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progress on migrating to heex templates and font-icons

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Adam Piontek 2022-08-13 07:32:36 -04:00
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21793 changed files with 2161968 additions and 16895 deletions

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## 4.2.0 (November 26, 2020)
- Trim Custom Property values when possible (#393)
- Fixed removing unit for zero-length dimentions in `min()`, `max()` and `clamp()` functions (#426)
- Fixed crash on bad value in TRBL declaration value (#412)
## 4.1.1 (November 15, 2020)
- Fixed build setup to exclude full `mdn/data` that reduced the lib size:
* dist/csso.js: 794.5Kb -> 255.2Kb
* dist/csso.min.js: 394.4Kb -> 194.2Kb
* package size: 237.8 kB -> 156.1 kB
* package unpacked size: 1.3 MB -> 586.8 kB
## 4.1.0 (October 27, 2020)
- Bumped [CSSTree](https://github.com/csstree/csstree) to `^1.0.0`
- Fixed wrongly merging of TRBL values when one of them contains `var()` (#420)
- Fixed wrongly merging of pseudo class and element with the same name, e.g. `:-ms-input-placeholder` and `::-ms-input-placeholder` (#383, #416)
- Fixed wrongly merging of `overflow` fallback (#415)
## 4.0.3 (March 24, 2020)
- Prevented percent sign removal in `flex`/`-ms-flex` (#410)
- Fixed restructuring optimisation in some cases (@charlessuh & @chsuh, #358, #411)
- Bumped dependencies (@AviVahl, #409)
## 4.0.2 (October 28, 2019)
- Fixed clean stage to avoid exceptions when source has unparsed or bad parts (#380)
- Fixed wrong percentage sign removal for zero values (#395)
## 4.0.1 (October 22, 2019)
- Bumped CSSTree to [`1.0.0-alpha.37`](https://github.com/csstree/csstree/releases/tag/v1.0.0-alpha.37) to avoid source map generation inconsistency across Node.js versions
## 4.0.0 (October 21, 2019)
- Dropped support for Node.js < 8
- Refreshed dev dependencies and scripts
- Bumped [CSSTree](https://github.com/csstree/csstree) to `1.0.0-alpha.36` (#399)
- Changed bundle files: `dist/csso.js` and `dist/csso.min.js` instead single `dist/csso-browser.js` (min version)
- Expose `compress()` as `syntax.compress()`
## 3.5.1 (June 7, 2018)
- Bumped [CSSTree](https://github.com/csstree/csstree) to `1.0.0-alpha.29` (fixes some issues)
## 3.5.0 (January 14, 2018)
- Migrated to [CSSTree](https://github.com/csstree/csstree) `1.0.0-alpha.27`
## 3.4.0 (November 3, 2017)
- Added percent sign removal for zero percentages for some properties that is safe (@RubaXa, #286)
- Removed unit removal for zero values in `-ms-flex` due it breaks flex in IE10/11 (#362)
- Improved performance of selectors comparison (@smelukov, #343)
## 3.3.1 (October 17, 2017)
- Fixed merge of `position` declarations when `sticky` fallback is using (@gruzzilkin, #356)
## 3.3.0 (October 12, 2017)
- Migrated to [CSSTree](https://github.com/csstree/csstree) `1.0.0-alpha25`
- Changed AST format (see [CSSTree change log](https://github.com/csstree/csstree/blob/master/HISTORY.md) for details)
- Fixed performance issue when generate CSS with source map (quadratic increase in time depending on the size of the CSS)
## 3.2.0 (September 10, 2017)
- Fixed named color compression to apply only when an identifier is guaranteed to be a color
- Added lifting of `@keyframes` to the beginning of style sheet (chunk), but after `@charset` and `@import` rules
- Added removal of `@keyframes`, `@media` and `@supports` with no prelude
- Added removal of duplicate `@keyframes` (#202)
- Added new option `forceMediaMerge` to force media rules merging. It's unsafe in general, but works fine in many cases. Use it on your own risk (#350)
- Bumped `CSSTree` to `1.0.0-alpha23`
## 3.1.1 (April 25, 2017)
- Fixed crash on a number processing when it used not in a list (#335)
## 3.1.0 (April 24, 2017)
- Implemented optimisation for `none` keyword in `border` and `outline` properties (@zoobestik, #41)
- Implemented replacing `rgba(x, x, x, 0)` to `transparent`
- Fixed plus sign omitting for numbers following identifier, hex color, number or unicode range, since it can change the meaning of CSS (e.g. `calc(1px+2px)` has been optimized to `calc(1px2px)` before, now it stays the same)
- Improved usage filtering for nested selectors (i.e. for `:nth-*()`, `:has()`, `:matches` and other pseudos)
- Implemented `blacklist` filtering in usage (#334, see [Black list filtering](https://github.com/css/csso#black-list-filtering))
- Improved white space removing, now white spaces are removing in the beginning and at the ending of sequences, and between stylesheet and block nodes
- Bumped `CSSTree` to `1.0.0-alpha19`
## 3.0.1 (March 14, 2017)
- Fixed declaration merging when declaration contains an `!important`
## 3.0.0 (March 13, 2017)
- Migrated to [CSSTree](https://github.com/csstree/csstree) as AST backend and exposed its API behind `syntax` property
- Extracted CLI into standalone package [css/csso-cli](https://github.com/css/csso-cli)
## 2.3.1 (January 6, 2017)
- Added `\0` IE hack support (#320)
## 2.3.0 (October 25, 2016)
- Added `beforeCompress` and `afterCompress` options support (#316)
- Fixed crash on empty argument in function (#317)
## 2.2.1 (July 25, 2016)
- Fixed shorthand optimisation issue when value has a color value or something unknown (#311)
- Fixed `cursor` broken fallback (#306)
## 2.2.0 (June 23, 2016)
- Implement AST cloning by adding `clone()` [function](https://github.com/css/csso#cloneast) and `clone` [option](https://github.com/css/csso#compressast-options) for `compress()` function (#296)
- Fix parse and translate attribute selector with flags but w/o operator (i.e. `[attrName i]`)
- Don't merge rules with flagged attribute selectors with others (#291)
- Take in account functions when merge TRBL-properties (#297, thanks to @ArturAralin)
- Improve partial merge (#304)
- Tweak scanner, reduce code deoptimizations and other small improvements
## 2.1.1 (May 11, 2016)
- Fix wrong declaration with `\9` hack merge (#295)
## 2.1.0 (May 8, 2016)
- New option `comments` to specify what comments to left: `exclamation`, `first-exclamation` and `none`
- Add `offset` to CSS parse error details
- Fix token `offset` computation
## 2.0.0 (April 5, 2016)
- No more `gonzales` AST format and related code
- `minify()` and `minifyBlock()` is always return an object as result now (i.e. `{ css: String, map: SourceMapGenerator or null }`)
- `parse()`
- Returns AST in new format (so called `internal`)
- Dynamic scanner implemented
- New AST format + dynamic scanner = performance boost and less memory consumption
- No more `context` argument, context should be specified via `options`
- Supported contexts now: `stylesheet`, `atrule`, `atruleExpression`, `ruleset`, `selector`, `simpleSelector`, `block`, `declaration` and `value`
- Drop `needPositions` option, `positions` option should be used instead
- Drop `needInfo` option, `info` object is attaching to nodes when some information is requested by `options`
- `options` should be an object, otherwise it treats as empty object
- `compress()`
- No more AST converting (performance boost and less memory consumption)
- Drop `outputAst` option
- Returns an object as result instead of AST (i.e. `{ ast: Object }`)
- Drop methods: `justDoIt()`, `stringify()`, `cleanInfo()`
## 1.8.1 (March 30, 2016)
- Don't remove spaces after function/braces/urls since unsafe (#289)
## 1.8.0 (March 24, 2016)
- Usage data support:
- Filter rulesets by tag names, class names and ids white lists.
- More aggressive ruleset moving using class name scopes information.
- New CLI option `--usage` to pass usage data file.
- Improve initial ruleset merge
- Change order of ruleset processing, now it's left to right. Previously unmerged rulesets may prevent lookup and other rulesets merge.
- Difference in pseudo signature just prevents ruleset merging, but don't stop lookup.
- Simplify block comparison (performance).
- New method `csso.minifyBlock()` for css block compression (e.g. `style` attribute content).
- Ruleset merge improvement: at-rules with block (like `@media` or `@supports`) now can be skipped during ruleset merge lookup if doesn't contain something prevents it.
- FIX: Add negation (`:not()`) to pseudo signature to avoid unsafe merge (old browsers doesn't support it).
- FIX: Check nested parts of value when compute compatibility. It fixes unsafe property merging.
## 1.7.1 (March 16, 2016)
- pass block mode to tokenizer for correct parsing of declarations properties with `//` hack
- fix wrongly `@import` and `@charset` removal on double exclamation comment
## 1.7.0 (March 10, 2016)
- support for [CSS Custom Properties](https://www.w3.org/TR/css-variables/) (#279)
- rework RTBL properties merge – better merge for values with special units and don't merge values with CSS-wide keywords (#255)
- remove redundant universal selectors (#178)
- take in account `!important` when check for property overriding (#280)
- don't merge `text-align` declarations with some values (#281)
- add spaces around `/deep/` combinator on translate, since it together with universal selector can produce a comment
- better keyword and property name resolving (tolerant to hacks and so on)
- integration improvements
- compression log function could be customized by `logger` option for `compress()` and `minify()`
- make possible to set initial line and column for parser
## 1.6.4 (March 1, 2016)
- `npm` publish issue (#276)
## 1.6.3 (February 29, 2016)
- add `file` to generated source map since other tools can relay on it in source map transform chain
## 1.6.2 (February 29, 2016)
- tweak some parse error messages and their positions
- fix `:not()` parsing and selector groups in `:not()` is supported now (#215)
- `needPosition` parser option is deprecated, `positions` option should be used instead (`needPosition` is used still if `positions` option omitted)
- expose internal AST API as `csso.internal.*`
- `minify()` adds `sourcesContent` by default when source map is generated
- bring back support for node.js `0.10` until major release (#275)
## 1.6.1 (February 28, 2016)
- fix exception on zero length dimension compress outside declaration (#273)
## 1.6.0 (February 27, 2016)
- **source maps support**
- parser remake:
- various parsing issues fixed
- fix unicode sequence processing in ident (#191)
- support for flags in attribute selector (#270)
- position (line and column) of parse error (#109)
- 4x performance boost, less memory consumption
- compressor refactoring
- internal AST is using doubly linked lists (with safe transformation support during iteration) instead of arrays
- rename `restructuring` to `restructure` option for `minify()`/`compress()` (`restructuring` is alias for `restructure` now, with lower priority)
- unquote urls when possible (#141, #60)
- setup code coverage and a number of related fixes
- add eslint to check unused things
## 1.5.4 (January 27, 2016)
- one more fix (in `restructRuleset` this time) with merge of rulesets when a ruleset with same specificity places between them (#264)
- disable partial merge of rulesets in `@keyframes` rulesets (until sure it's correct)
## 1.5.3 (January 25, 2016)
- don't override display values with different browser support (#259)
- fix publish issue (one of modules leak in development state)
## 1.5.2 (January 24, 2016)
- don't merge rulesets if between them a ruleset with same specificity (#264)
## 1.5.1 (January 14, 2016)
- ensure `-` is not used as an identifier in attribute selectors (thanks to @mathiasbynens)
- fix broken `justDoIt()` function
- various small fixes
## 1.5.0 (January 14, 2016)
### Parser
- attach minus to number
### Compressor
- split code base into small modules and related refactoring
- introduce internal AST format for compressor (`gonzales`→`internal` and `internal`→`gonzales` convertors, walkers, translator)
- various optimizations: no snapshots, using caches and indexes
- sort selectors, merge selectors in alphabet order
- compute selector's specificity
- better ruleset restructuring, improve compression of partially equal blocks
- better ruleset merge – not only closest but also disjoined by other rulesets when safe
- join `@media` with same query
- `outputAst` – new option to specify output AST format (`gonzales` by default for backward compatibility)
- remove quotes surrounding attribute values in attribute selectors when possible (#73)
- replace `from`→`0%` and `100%`→`to` at `@keyframes` (#205)
- prevent partial merge of rulesets at `@keyframes` (#80, #197)
### API
- walker for `gonzales` AST was implemented
### CLI
- new option `--stat` (output stat in `stderr`)
- new optional parameter `level` for `--debug` option
## 1.4.4 (December 10, 2015)
- prevent removal of spaces after braces that before identifier that breaking at-rules expressions (#258)
## 1.4.3 (December 4, 2015)
- fix unicode-range parsing that cause to wrong function detection (#250)
## 1.4.2 (November 9, 2015)
- allow spaces between `progid:` and rest part of value for IE's `filter` property as `autoprefixer` generates this kind of code (#249)
- fixes for Windows:
- correct processing new lines
- normalize file content in test suite
- fixes to work in strict mode (#252)
- init compressor dictionaries for every css block (#248, #251)
- bump uglify-js version
## 1.4.1 (October 20, 2015)
- allow merge for `display` property (#167, #244)
- more accurate `rect` (`clip` property value) merge
- fix typo when specifying options in cli (thanks to @Taritsyn)
- fix safe unit values merge with keyword values (#244)
- fix wrong descendant combinator removal (#246)
- build browser version on `prepublish` (thanks to @silentroach)
- parser: store whitespaces as single token (performance and reduce memory consumption)
- rearrange compress tests layout
## 1.4 (October 16, 2015)
Bringing project back to life. Changed files structure, cleaned up and refactored most of sources.
### Common
- single code base (no more `src` folder)
- build browser version with `browserify` (no more `make`, and `web` folder), browser version is available at `dist/csso-browser.js`
- main file is `lib/index.js` now
- minimal `node.js` version is `0.12` now
- restrict file list to publish on npm (no more useless folders and files in package)
- add `jscs` to control code style
- automate `gh-pages` update
- util functions reworked
- translator reworked
- test suite reworked
- compressor refactored
- initial parser refactoring
### API
- new method `minify(src, options)`, options:
- `restructuring` – if set to `false`, disable structure optimisations (`true` by default)
- `debug` - outputs intermediate state of CSS during compression (`false` by default)
- deprecate `justDoIt()` method (use `minify` instead)
- rename `treeToString()` method to `stringify()`
- drop `printTree()` method
- AST node info
- `column` and `offset` added
- `ln` renamed to `line`
- fix line counting across multiple files and input with CR LF (#147)
### CLI
- completely reworked, use [clap](https://github.com/lahmatiy/clap) to parse argv
- add support for input from stdin (#128)
- drop undocumented and obsoleted options `--rule` and `--parser` (suppose nobody use it)
- drop `-off` alias for `--restructure-off` as incorrect (only one letter options should starts with single `-`)
- new option `--debug` that reflecting to `options.debug` for `minify`
### Parsing and optimizations
- keep all exclamation comments (#194)
- add `/deep/` combinator support (#209)
- attribute selector
- allow colon in attribute name (#237)
- support for namespaces (#233)
- color
- support all css/html colors
- convert `hsla` to `rgba` and `hls` to `rgb`
- convert `rgba` with 1 as alpha value to `rgb` (#122)
- interpolate `rgb` and `rgba` percentage values to absolute values
- replace percentage values in `rgba` for normalized/interpolated values
- lowercase hex colors and color names (#169)
- fix color minification when hex value replaced for color name (#176)
- fit rgb values to 0..255 range (#181)
- calc
- remove spaces for multiple operator in calc
- don't remove units inside calc (#222)
- fix wrong white space removal around `+` and `-` (#228)
- don't remove units in `flex` property as it could change value meaning (#200)
- don't merge `\9` hack values (#231)
- merge property values only if they have the same functions (#150, #227)
- don't merge property values with some sort of units (#140, #161)
- fix `!important` issue for `top-right-bottom-left` properties (#189)
- fix `top-right-bottom-left` properties merge (#139, #175)
- support for unicode-range (#148)
- don't crash on ruleset with no selector (#135)
- tolerant to class names that starts with digit (#99, #105)
- fix background compressing (#170)
## 1.3.12 (October 8, 2015)
- Case insensitive check for `!important` (#187)
- Fix problems with using `csso` as cli command on Windows (#83, #136, #142 and others)
- Remove byte order marker (the UTF-8 BOM) from input
- Don't strip space between funktion-funktion and funktion-vhash (#134)
- Don't merge TRBL values having \9 (hack for IE8 in bootstrap) (#159, #214, #230, #231 and others)
- Don't strip units off dimensions of non-length (#226, #229 and others)
## 1.3.7 (February 11, 2013)
- Gonzales 1.0.7.
## 1.3.6 (November 26, 2012)
- Gonzales 1.0.6.
## 1.3.5 (October 28, 2012)
- Gonzales 1.0.5.
- Protecting copyright notices in CSS: https://github.com/css/csso/issues/92
- Zero CSS throws an error: https://github.com/css/csso/issues/96
- Don't minify the second `0s` in Firefox for animations: https://github.com/css/csso/issues/100
- Japan manual
- BEM ready documentation
## 1.3.4 (October 10, 2012)
- @page inside @media Causes Error: https://github.com/css/csso/issues/90
## 1.3.3 (October 9, 2012)
- CSSO 1.3.2 compresses ".t-1" and ".t-01" as identical classes: https://github.com/css/csso/issues/88
## 1.3.2 (October 8, 2012)
- filter + important breaks CSSO v1.3.1: https://github.com/css/csso/issues/87
## 1.3.1 (October 8, 2012)
- "filter" IE property breaks CSSO v1.3.0: https://github.com/css/csso/issues/86
## 1.3.0 (October 4, 2012)
- PeCode CSS parser replaced by Gonzales CSS parser

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Copyright (C) 2015-2019 by Roman Dvornov
Copyright (C) 2011-2015 by Sergey Kryzhanovsky
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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[![NPM version](https://img.shields.io/npm/v/csso.svg)](https://www.npmjs.com/package/csso)
[![Build Status](https://travis-ci.org/css/csso.svg?branch=master)](https://travis-ci.org/css/csso)
[![Coverage Status](https://coveralls.io/repos/github/css/csso/badge.svg?branch=master)](https://coveralls.io/github/css/csso?branch=master)
[![NPM Downloads](https://img.shields.io/npm/dm/csso.svg)](https://www.npmjs.com/package/csso)
[![Twitter](https://img.shields.io/badge/Twitter-@cssoptimizer-blue.svg)](https://twitter.com/cssoptimizer)
CSSO (CSS Optimizer) is a CSS minifier. It performs three sort of transformations: cleaning (removing redundant), compression (replacement for shorter form) and restructuring (merge of declarations, rulesets and so on). As a result your CSS becomes much smaller.
[![Originated by Yandex](https://cdn.rawgit.com/css/csso/8d1b89211ac425909f735e7d5df87ee16c2feec6/docs/yandex.svg)](https://www.yandex.com/)
[![Sponsored by Avito](https://cdn.rawgit.com/css/csso/8d1b89211ac425909f735e7d5df87ee16c2feec6/docs/avito.svg)](https://www.avito.ru/)
## Ready to use
- [Web interface](http://css.github.io/csso/csso.html)
- [csso-cli](https://github.com/css/csso-cli) – command line interface
- [gulp-csso](https://github.com/ben-eb/gulp-csso) – `Gulp` plugin
- [grunt-csso](https://github.com/t32k/grunt-csso) – `Grunt` plugin
- [broccoli-csso](https://github.com/sindresorhus/broccoli-csso) – `Broccoli` plugin
- [postcss-csso](https://github.com/lahmatiy/postcss-csso) – `PostCSS` plugin
- [csso-loader](https://github.com/sandark7/csso-loader) – `webpack` loader
- [csso-webpack-plugin](https://github.com/zoobestik/csso-webpack-plugin) – `webpack` plugin
- [CSSO Visual Studio Code plugin](https://marketplace.visualstudio.com/items?itemName=Aneryu.csso)
## Install
```
npm install csso
```
## API
<!-- TOC depthfrom:3 -->
- [minify(source[, options])](#minifysource-options)
- [minifyBlock(source[, options])](#minifyblocksource-options)
- [syntax.compress(ast[, options])](#syntaxcompressast-options)
- [Source maps](#source-maps)
- [Usage data](#usage-data)
- [White list filtering](#white-list-filtering)
- [Black list filtering](#black-list-filtering)
- [Scopes](#scopes)
<!-- /TOC -->
Basic usage:
```js
var csso = require('csso');
var minifiedCss = csso.minify('.test { color: #ff0000; }').css;
console.log(minifiedCss);
// .test{color:red}
```
CSSO is based on [CSSTree](https://github.com/csstree/csstree) to parse CSS into AST, AST traversal and to generate AST back to CSS. All `CSSTree` API is available behind `syntax` field. You may minify CSS step by step:
```js
var csso = require('csso');
var ast = csso.syntax.parse('.test { color: #ff0000; }');
var compressedAst = csso.syntax.compress(ast).ast;
var minifiedCss = csso.syntax.generate(compressedAst);
console.log(minifiedCss);
// .test{color:red}
```
> Warning: CSSO uses early versions of CSSTree that still in active development. CSSO doesn't guarantee API behind `syntax` field or AST format will not change in future releases of CSSO, since it's subject to change in CSSTree. Be careful with CSSO updates if you use `syntax` API until this warning removal.
### minify(source[, options])
Minify `source` CSS passed as `String`.
```js
var result = csso.minify('.test { color: #ff0000; }', {
restructure: false, // don't change CSS structure, i.e. don't merge declarations, rulesets etc
debug: true // show additional debug information:
// true or number from 1 to 3 (greater number - more details)
});
console.log(result.css);
// > .test{color:red}
```
Returns an object with properties:
- css `String` – resulting CSS
- map `Object` – instance of [`SourceMapGenerator`](https://github.com/mozilla/source-map#sourcemapgenerator) or `null`
Options:
- sourceMap
Type: `Boolean`
Default: `false`
Generate a source map when `true`.
- filename
Type: `String`
Default: `'<unknown>'`
Filename of input CSS, uses for source map generation.
- debug
Type: `Boolean`
Default: `false`
Output debug information to `stderr`.
- beforeCompress
Type: `function(ast, options)` or `Array<function(ast, options)>` or `null`
Default: `null`
Called right after parse is run.
- afterCompress
Type: `function(compressResult, options)` or `Array<function(compressResult, options)>` or `null`
Default: `null`
Called right after [`syntax.compress()`](#syntaxcompressast-options) is run.
- Other options are the same as for [`syntax.compress()`](#syntaxcompressast-options) function.
### minifyBlock(source[, options])
The same as `minify()` but for list of declarations. Usually it's a `style` attribute value.
```js
var result = csso.minifyBlock('color: rgba(255, 0, 0, 1); color: #ff0000');
console.log(result.css);
// > color:red
```
### syntax.compress(ast[, options])
Does the main task – compress an AST. This is CSSO's extension in CSSTree syntax API.
> NOTE: `syntax.compress()` performs AST compression by transforming input AST by default (since AST cloning is expensive and needed in rare cases). Use `clone` option with truthy value in case you want to keep input AST untouched.
Returns an object with properties:
- ast `Object` – resulting AST
Options:
- restructure
Type: `Boolean`
Default: `true`
Disable or enable a structure optimisations.
- forceMediaMerge
Type: `Boolean`
Default: `false`
Enables merging of `@media` rules with the same media query by splitted by other rules. The optimisation is unsafe in general, but should work fine in most cases. Use it on your own risk.
- clone
Type: `Boolean`
Default: `false`
Transform a copy of input AST if `true`. Useful in case of AST reuse.
- comments
Type: `String` or `Boolean`
Default: `true`
Specify what comments to leave:
- `'exclamation'` or `true` – leave all exclamation comments (i.e. `/*! .. */`)
- `'first-exclamation'` – remove every comment except first one
- `false` – remove all comments
- usage
Type: `Object` or `null`
Default: `null`
Usage data for advanced optimisations (see [Usage data](#usage-data) for details)
- logger
Type: `Function` or `null`
Default: `null`
Function to track every step of transformation.
### Source maps
To get a source map set `true` for `sourceMap` option. Additianaly `filename` option can be passed to specify source file. When `sourceMap` option is `true`, `map` field of result object will contain a [`SourceMapGenerator`](https://github.com/mozilla/source-map#sourcemapgenerator) instance. This object can be mixed with another source map or translated to string.
```js
var csso = require('csso');
var css = fs.readFileSync('path/to/my.css', 'utf8');
var result = csso.minify(css, {
filename: 'path/to/my.css', // will be added to source map as reference to source file
sourceMap: true // generate source map
});
console.log(result);
// { css: '...minified...', map: SourceMapGenerator {} }
console.log(result.map.toString());
// '{ .. source map content .. }'
```
Example of generating source map with respect of source map from input CSS:
```js
var require('source-map');
var csso = require('csso');
var inputFile = 'path/to/my.css';
var input = fs.readFileSync(inputFile, 'utf8');
var inputMap = input.match(/\/\*# sourceMappingURL=(\S+)\s*\*\/\s*$/);
var output = csso.minify(input, {
filename: inputFile,
sourceMap: true
});
// apply input source map to output
if (inputMap) {
output.map.applySourceMap(
new SourceMapConsumer(inputMap[1]),
inputFile
)
}
// result CSS with source map
console.log(
output.css +
'/*# sourceMappingURL=data:application/json;base64,' +
new Buffer(output.map.toString()).toString('base64') +
' */'
);
```
### Usage data
`CSSO` can use data about how `CSS` is used in a markup for better compression. File with this data (`JSON`) can be set using `usage` option. Usage data may contain following sections:
- `blacklist` – a set of black lists (see [Black list filtering](#black-list-filtering))
- `tags` – white list of tags
- `ids` – white list of ids
- `classes` – white list of classes
- `scopes` – groups of classes which never used with classes from other groups on the same element
All sections are optional. Value of `tags`, `ids` and `classes` should be an array of a string, value of `scopes` should be an array of arrays of strings. Other values are ignoring.
#### White list filtering
`tags`, `ids` and `classes` are using on clean stage to filter selectors that contain something not in the lists. Selectors are filtering only by those kind of simple selector which white list is specified. For example, if only `tags` list is specified then type selectors are checking, and if all type selectors in selector present in list or selector has no any type selector it isn't filter.
> `ids` and `classes` are case sensitive, `tags` – is not.
Input CSS:
```css
* { color: green; }
ul, ol, li { color: blue; }
UL.foo, span.bar { color: red; }
```
Usage data:
```json
{
"tags": ["ul", "LI"]
}
```
Resulting CSS:
```css
*{color:green}ul,li{color:blue}ul.foo{color:red}
```
Filtering performs for nested selectors too. `:not()` pseudos content is ignoring since the result of matching is unpredictable. Example for the same usage data as above:
```css
:nth-child(2n of ul, ol) { color: red }
:nth-child(3n + 1 of img) { color: yellow }
:not(div, ol, ul) { color: green }
:has(:matches(ul, ol), ul, ol) { color: blue }
```
Turns into:
```css
:nth-child(2n of ul){color:red}:not(div,ol,ul){color:green}:has(:matches(ul),ul){color:blue}
```
#### Black list filtering
Black list filtering performs the same as white list filtering, but filters things that mentioned in the lists. `blacklist` can contain the lists `tags`, `ids` and `classes`.
Black list has a higher priority, so when something mentioned in the white list and in the black list then white list occurrence is ignoring. The `:not()` pseudos content ignoring as well.
```css
* { color: green; }
ul, ol, li { color: blue; }
UL.foo, li.bar { color: red; }
```
Usage data:
```json
{
"blacklist": {
"tags": ["ul"]
},
"tags": ["ul", "LI"]
}
```
Resulting CSS:
```css
*{color:green}li{color:blue}li.bar{color:red}
```
#### Scopes
Scopes is designed for CSS scope isolation solutions such as [css-modules](https://github.com/css-modules/css-modules). Scopes are similar to namespaces and define lists of class names that exclusively used on some markup. This information allows the optimizer to move rules more agressive. Since it assumes selectors from different scopes don't match for the same element. This can improve rule merging.
Suppose we have a file:
```css
.module1-foo { color: red; }
.module1-bar { font-size: 1.5em; background: yellow; }
.module2-baz { color: red; }
.module2-qux { font-size: 1.5em; background: yellow; width: 50px; }
```
It can be assumed that first two rules are never used with the second two on the same markup. But we can't say that for sure without a markup review. The optimizer doesn't know it either and will perform safe transformations only. The result will be the same as input but with no spaces and some semicolons:
```css
.module1-foo{color:red}.module1-bar{font-size:1.5em;background:#ff0}.module2-baz{color:red}.module2-qux{font-size:1.5em;background:#ff0;width:50px}
```
With usage data `CSSO` can produce better output. If follow usage data is provided:
```json
{
"scopes": [
["module1-foo", "module1-bar"],
["module2-baz", "module2-qux"]
]
}
```
The result will be (29 bytes extra saving):
```css
.module1-foo,.module2-baz{color:red}.module1-bar,.module2-qux{font-size:1.5em;background:#ff0}.module2-qux{width:50px}
```
If class name isn't mentioned in the `scopes` it belongs to default scope. `scopes` data doesn't affect `classes` whitelist. If class name mentioned in `scopes` but missed in `classes` (both sections are specified) it will be filtered.
Note that class name can't be set for several scopes. Also a selector can't have class names from different scopes. In both cases an exception will thrown.
Currently the optimizer doesn't care about changing order safety for out-of-bounds selectors (i.e. selectors that match to elements without class name, e.g. `.scope div` or `.scope ~ :last-child`). It assumes that scoped CSS modules doesn't relay on it's order. It may be fix in future if to be an issue.

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var resolveKeyword = require('css-tree').keyword;
var { hasNoChildren } = require('./utils');
module.exports = function cleanAtrule(node, item, list) {
if (node.block) {
// otherwise removed at-rule don't prevent @import for removal
if (this.stylesheet !== null) {
this.stylesheet.firstAtrulesAllowed = false;
}
if (hasNoChildren(node.block)) {
list.remove(item);
return;
}
}
switch (node.name) {
case 'charset':
if (hasNoChildren(node.prelude)) {
list.remove(item);
return;
}
// if there is any rule before @charset -> remove it
if (item.prev) {
list.remove(item);
return;
}
break;
case 'import':
if (this.stylesheet === null || !this.stylesheet.firstAtrulesAllowed) {
list.remove(item);
return;
}
// if there are some rules that not an @import or @charset before @import
// remove it
list.prevUntil(item.prev, function(rule) {
if (rule.type === 'Atrule') {
if (rule.name === 'import' || rule.name === 'charset') {
return;
}
}
this.root.firstAtrulesAllowed = false;
list.remove(item);
return true;
}, this);
break;
default:
var name = resolveKeyword(node.name).basename;
if (name === 'keyframes' ||
name === 'media' ||
name === 'supports') {
// drop at-rule with no prelude
if (hasNoChildren(node.prelude) || hasNoChildren(node.block)) {
list.remove(item);
}
}
}
};

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module.exports = function cleanComment(data, item, list) {
list.remove(item);
};

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var property = require('css-tree').property;
module.exports = function cleanDeclartion(node, item, list) {
if (node.value.children && node.value.children.isEmpty()) {
list.remove(item);
return;
}
if (property(node.property).custom) {
if (/\S/.test(node.value.value)) {
node.value.value = node.value.value.trim();
}
}
};

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var { isNodeChildrenList } = require('./utils');
module.exports = function cleanRaw(node, item, list) {
// raw in stylesheet or block children
if (isNodeChildrenList(this.stylesheet, list) ||
isNodeChildrenList(this.block, list)) {
list.remove(item);
}
};

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var hasOwnProperty = Object.prototype.hasOwnProperty;
var walk = require('css-tree').walk;
var { hasNoChildren } = require('./utils');
function cleanUnused(selectorList, usageData) {
selectorList.children.each(function(selector, item, list) {
var shouldRemove = false;
walk(selector, function(node) {
// ignore nodes in nested selectors
if (this.selector === null || this.selector === selectorList) {
switch (node.type) {
case 'SelectorList':
// TODO: remove toLowerCase when pseudo selectors will be normalized
// ignore selectors inside :not()
if (this.function === null || this.function.name.toLowerCase() !== 'not') {
if (cleanUnused(node, usageData)) {
shouldRemove = true;
}
}
break;
case 'ClassSelector':
if (usageData.whitelist !== null &&
usageData.whitelist.classes !== null &&
!hasOwnProperty.call(usageData.whitelist.classes, node.name)) {
shouldRemove = true;
}
if (usageData.blacklist !== null &&
usageData.blacklist.classes !== null &&
hasOwnProperty.call(usageData.blacklist.classes, node.name)) {
shouldRemove = true;
}
break;
case 'IdSelector':
if (usageData.whitelist !== null &&
usageData.whitelist.ids !== null &&
!hasOwnProperty.call(usageData.whitelist.ids, node.name)) {
shouldRemove = true;
}
if (usageData.blacklist !== null &&
usageData.blacklist.ids !== null &&
hasOwnProperty.call(usageData.blacklist.ids, node.name)) {
shouldRemove = true;
}
break;
case 'TypeSelector':
// TODO: remove toLowerCase when type selectors will be normalized
// ignore universal selectors
if (node.name.charAt(node.name.length - 1) !== '*') {
if (usageData.whitelist !== null &&
usageData.whitelist.tags !== null &&
!hasOwnProperty.call(usageData.whitelist.tags, node.name.toLowerCase())) {
shouldRemove = true;
}
if (usageData.blacklist !== null &&
usageData.blacklist.tags !== null &&
hasOwnProperty.call(usageData.blacklist.tags, node.name.toLowerCase())) {
shouldRemove = true;
}
}
break;
}
}
});
if (shouldRemove) {
list.remove(item);
}
});
return selectorList.children.isEmpty();
}
module.exports = function cleanRule(node, item, list, options) {
if (hasNoChildren(node.prelude) || hasNoChildren(node.block)) {
list.remove(item);
return;
}
var usageData = options.usage;
if (usageData && (usageData.whitelist !== null || usageData.blacklist !== null)) {
cleanUnused(node.prelude, usageData);
if (hasNoChildren(node.prelude)) {
list.remove(item);
return;
}
}
};

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// remove useless universal selector
module.exports = function cleanTypeSelector(node, item, list) {
var name = item.data.name;
// check it's a non-namespaced universal selector
if (name !== '*') {
return;
}
// remove when universal selector before other selectors
var nextType = item.next && item.next.data.type;
if (nextType === 'IdSelector' ||
nextType === 'ClassSelector' ||
nextType === 'AttributeSelector' ||
nextType === 'PseudoClassSelector' ||
nextType === 'PseudoElementSelector') {
list.remove(item);
}
};

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var { isNodeChildrenList } = require('./utils');
function isSafeOperator(node) {
return node.type === 'Operator' && node.value !== '+' && node.value !== '-';
}
module.exports = function cleanWhitespace(node, item, list) {
// remove when first or last item in sequence
if (item.next === null || item.prev === null) {
list.remove(item);
return;
}
// white space in stylesheet or block children
if (isNodeChildrenList(this.stylesheet, list) ||
isNodeChildrenList(this.block, list)) {
list.remove(item);
return;
}
if (item.next.data.type === 'WhiteSpace') {
list.remove(item);
return;
}
if (isSafeOperator(item.prev.data) || isSafeOperator(item.next.data)) {
list.remove(item);
return;
}
};

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var walk = require('css-tree').walk;
var handlers = {
Atrule: require('./Atrule'),
Comment: require('./Comment'),
Declaration: require('./Declaration'),
Raw: require('./Raw'),
Rule: require('./Rule'),
TypeSelector: require('./TypeSelector'),
WhiteSpace: require('./WhiteSpace')
};
module.exports = function(ast, options) {
walk(ast, {
leave: function(node, item, list) {
if (handlers.hasOwnProperty(node.type)) {
handlers[node.type].call(this, node, item, list, options);
}
}
});
};

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module.exports = {
hasNoChildren: function(node) {
return !node || !node.children || node.children.isEmpty();
},
isNodeChildrenList: function(node, list) {
return node !== null && node.children === list;
}
};

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var List = require('css-tree').List;
var clone = require('css-tree').clone;
var usageUtils = require('./usage');
var clean = require('./clean');
var replace = require('./replace');
var restructure = require('./restructure');
var walk = require('css-tree').walk;
function readChunk(children, specialComments) {
var buffer = new List();
var nonSpaceTokenInBuffer = false;
var protectedComment;
children.nextUntil(children.head, function(node, item, list) {
if (node.type === 'Comment') {
if (!specialComments || node.value.charAt(0) !== '!') {
list.remove(item);
return;
}
if (nonSpaceTokenInBuffer || protectedComment) {
return true;
}
list.remove(item);
protectedComment = node;
return;
}
if (node.type !== 'WhiteSpace') {
nonSpaceTokenInBuffer = true;
}
buffer.insert(list.remove(item));
});
return {
comment: protectedComment,
stylesheet: {
type: 'StyleSheet',
loc: null,
children: buffer
}
};
}
function compressChunk(ast, firstAtrulesAllowed, num, options) {
options.logger('Compress block #' + num, null, true);
var seed = 1;
if (ast.type === 'StyleSheet') {
ast.firstAtrulesAllowed = firstAtrulesAllowed;
ast.id = seed++;
}
walk(ast, {
visit: 'Atrule',
enter: function markScopes(node) {
if (node.block !== null) {
node.block.id = seed++;
}
}
});
options.logger('init', ast);
// remove redundant
clean(ast, options);
options.logger('clean', ast);
// replace nodes for shortened forms
replace(ast, options);
options.logger('replace', ast);
// structure optimisations
if (options.restructuring) {
restructure(ast, options);
}
return ast;
}
function getCommentsOption(options) {
var comments = 'comments' in options ? options.comments : 'exclamation';
if (typeof comments === 'boolean') {
comments = comments ? 'exclamation' : false;
} else if (comments !== 'exclamation' && comments !== 'first-exclamation') {
comments = false;
}
return comments;
}
function getRestructureOption(options) {
if ('restructure' in options) {
return options.restructure;
}
return 'restructuring' in options ? options.restructuring : true;
}
function wrapBlock(block) {
return new List().appendData({
type: 'Rule',
loc: null,
prelude: {
type: 'SelectorList',
loc: null,
children: new List().appendData({
type: 'Selector',
loc: null,
children: new List().appendData({
type: 'TypeSelector',
loc: null,
name: 'x'
})
})
},
block: block
});
}
module.exports = function compress(ast, options) {
ast = ast || { type: 'StyleSheet', loc: null, children: new List() };
options = options || {};
var compressOptions = {
logger: typeof options.logger === 'function' ? options.logger : function() {},
restructuring: getRestructureOption(options),
forceMediaMerge: Boolean(options.forceMediaMerge),
usage: options.usage ? usageUtils.buildIndex(options.usage) : false
};
var specialComments = getCommentsOption(options);
var firstAtrulesAllowed = true;
var input;
var output = new List();
var chunk;
var chunkNum = 1;
var chunkChildren;
if (options.clone) {
ast = clone(ast);
}
if (ast.type === 'StyleSheet') {
input = ast.children;
ast.children = output;
} else {
input = wrapBlock(ast);
}
do {
chunk = readChunk(input, Boolean(specialComments));
compressChunk(chunk.stylesheet, firstAtrulesAllowed, chunkNum++, compressOptions);
chunkChildren = chunk.stylesheet.children;
if (chunk.comment) {
// add \n before comment if there is another content in output
if (!output.isEmpty()) {
output.insert(List.createItem({
type: 'Raw',
value: '\n'
}));
}
output.insert(List.createItem(chunk.comment));
// add \n after comment if chunk is not empty
if (!chunkChildren.isEmpty()) {
output.insert(List.createItem({
type: 'Raw',
value: '\n'
}));
}
}
if (firstAtrulesAllowed && !chunkChildren.isEmpty()) {
var lastRule = chunkChildren.last();
if (lastRule.type !== 'Atrule' ||
(lastRule.name !== 'import' && lastRule.name !== 'charset')) {
firstAtrulesAllowed = false;
}
}
if (specialComments !== 'exclamation') {
specialComments = false;
}
output.appendList(chunkChildren);
} while (!input.isEmpty());
return {
ast: ast
};
};

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var csstree = require('css-tree');
var parse = csstree.parse;
var compress = require('./compress');
var generate = csstree.generate;
function debugOutput(name, options, startTime, data) {
if (options.debug) {
console.error('## ' + name + ' done in %d ms\n', Date.now() - startTime);
}
return data;
}
function createDefaultLogger(level) {
var lastDebug;
return function logger(title, ast) {
var line = title;
if (ast) {
line = '[' + ((Date.now() - lastDebug) / 1000).toFixed(3) + 's] ' + line;
}
if (level > 1 && ast) {
var css = generate(ast);
// when level 2, limit css to 256 symbols
if (level === 2 && css.length > 256) {
css = css.substr(0, 256) + '...';
}
line += '\n ' + css + '\n';
}
console.error(line);
lastDebug = Date.now();
};
}
function copy(obj) {
var result = {};
for (var key in obj) {
result[key] = obj[key];
}
return result;
}
function buildCompressOptions(options) {
options = copy(options);
if (typeof options.logger !== 'function' && options.debug) {
options.logger = createDefaultLogger(options.debug);
}
return options;
}
function runHandler(ast, options, handlers) {
if (!Array.isArray(handlers)) {
handlers = [handlers];
}
handlers.forEach(function(fn) {
fn(ast, options);
});
}
function minify(context, source, options) {
options = options || {};
var filename = options.filename || '<unknown>';
var result;
// parse
var ast = debugOutput('parsing', options, Date.now(),
parse(source, {
context: context,
filename: filename,
positions: Boolean(options.sourceMap)
})
);
// before compress handlers
if (options.beforeCompress) {
debugOutput('beforeCompress', options, Date.now(),
runHandler(ast, options, options.beforeCompress)
);
}
// compress
var compressResult = debugOutput('compress', options, Date.now(),
compress(ast, buildCompressOptions(options))
);
// after compress handlers
if (options.afterCompress) {
debugOutput('afterCompress', options, Date.now(),
runHandler(compressResult, options, options.afterCompress)
);
}
// generate
if (options.sourceMap) {
result = debugOutput('generate(sourceMap: true)', options, Date.now(), (function() {
var tmp = generate(compressResult.ast, { sourceMap: true });
tmp.map._file = filename; // since other tools can relay on file in source map transform chain
tmp.map.setSourceContent(filename, source);
return tmp;
}()));
} else {
result = debugOutput('generate', options, Date.now(), {
css: generate(compressResult.ast),
map: null
});
}
return result;
}
function minifyStylesheet(source, options) {
return minify('stylesheet', source, options);
}
function minifyBlock(source, options) {
return minify('declarationList', source, options);
}
module.exports = {
version: require('../package.json').version,
// main methods
minify: minifyStylesheet,
minifyBlock: minifyBlock,
// css syntax parser/walkers/generator/etc
syntax: Object.assign({
compress: compress
}, csstree)
};

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var resolveKeyword = require('css-tree').keyword;
var compressKeyframes = require('./atrule/keyframes');
module.exports = function(node) {
// compress @keyframe selectors
if (resolveKeyword(node.name).basename === 'keyframes') {
compressKeyframes(node);
}
};

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// Can unquote attribute detection
// Adopted implementation of Mathias Bynens
// https://github.com/mathiasbynens/mothereff.in/blob/master/unquoted-attributes/eff.js
var escapesRx = /\\([0-9A-Fa-f]{1,6})(\r\n|[ \t\n\f\r])?|\\./g;
var blockUnquoteRx = /^(-?\d|--)|[\u0000-\u002c\u002e\u002f\u003A-\u0040\u005B-\u005E\u0060\u007B-\u009f]/;
function canUnquote(value) {
if (value === '' || value === '-') {
return;
}
// Escapes are valid, so replace them with a valid non-empty string
value = value.replace(escapesRx, 'a');
return !blockUnquoteRx.test(value);
}
module.exports = function(node) {
var attrValue = node.value;
if (!attrValue || attrValue.type !== 'String') {
return;
}
var unquotedValue = attrValue.value.replace(/^(.)(.*)\1$/, '$2');
if (canUnquote(unquotedValue)) {
node.value = {
type: 'Identifier',
loc: attrValue.loc,
name: unquotedValue
};
}
};

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var packNumber = require('./Number').pack;
var MATH_FUNCTIONS = {
'calc': true,
'min': true,
'max': true,
'clamp': true
};
var LENGTH_UNIT = {
// absolute length units
'px': true,
'mm': true,
'cm': true,
'in': true,
'pt': true,
'pc': true,
// relative length units
'em': true,
'ex': true,
'ch': true,
'rem': true,
// viewport-percentage lengths
'vh': true,
'vw': true,
'vmin': true,
'vmax': true,
'vm': true
};
module.exports = function compressDimension(node, item) {
var value = packNumber(node.value, item);
node.value = value;
if (value === '0' && this.declaration !== null && this.atrulePrelude === null) {
var unit = node.unit.toLowerCase();
// only length values can be compressed
if (!LENGTH_UNIT.hasOwnProperty(unit)) {
return;
}
// issue #362: shouldn't remove unit in -ms-flex since it breaks flex in IE10/11
// issue #200: shouldn't remove unit in flex since it breaks flex in IE10/11
if (this.declaration.property === '-ms-flex' ||
this.declaration.property === 'flex') {
return;
}
// issue #222: don't remove units inside calc
if (this.function && MATH_FUNCTIONS.hasOwnProperty(this.function.name)) {
return;
}
item.data = {
type: 'Number',
loc: node.loc,
value: value
};
}
};

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var OMIT_PLUSSIGN = /^(?:\+|(-))?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/;
var KEEP_PLUSSIGN = /^([\+\-])?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/;
var unsafeToRemovePlusSignAfter = {
Dimension: true,
Hash: true,
Identifier: true,
Number: true,
Raw: true,
UnicodeRange: true
};
function packNumber(value, item) {
// omit plus sign only if no prev or prev is safe type
var regexp = item && item.prev !== null && unsafeToRemovePlusSignAfter.hasOwnProperty(item.prev.data.type)
? KEEP_PLUSSIGN
: OMIT_PLUSSIGN;
// 100 -> '100'
// 00100 -> '100'
// +100 -> '100' (only when safe, e.g. omitting plus sign for 1px+1px leads to single dimension instead of two)
// -100 -> '-100'
// 0.123 -> '.123'
// 0.12300 -> '.123'
// 0.0 -> ''
// 0 -> ''
// -0 -> '-'
value = String(value).replace(regexp, '$1$2$3');
if (value === '' || value === '-') {
value = '0';
}
return value;
}
module.exports = function(node, item) {
node.value = packNumber(node.value, item);
};
module.exports.pack = packNumber;

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var lexer = require('css-tree').lexer;
var packNumber = require('./Number').pack;
var blacklist = new Set([
// see https://github.com/jakubpawlowicz/clean-css/issues/957
'width',
'min-width',
'max-width',
'height',
'min-height',
'max-height',
// issue #410: Don’t remove units in flex-basis value for (-ms-)flex shorthand
// issue #362: shouldn't remove unit in -ms-flex since it breaks flex in IE10/11
// issue #200: shouldn't remove unit in flex since it breaks flex in IE10/11
'flex',
'-ms-flex'
]);
module.exports = function compressPercentage(node, item) {
node.value = packNumber(node.value, item);
if (node.value === '0' && this.declaration && !blacklist.has(this.declaration.property)) {
// try to convert a number
item.data = {
type: 'Number',
loc: node.loc,
value: node.value
};
// that's ok only when new value matches on length
if (!lexer.matchDeclaration(this.declaration).isType(item.data, 'length')) {
// otherwise rollback changes
item.data = node;
}
}
};

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module.exports = function(node) {
var value = node.value;
// remove escaped newlines, i.e.
// .a { content: "foo\
// bar"}
// ->
// .a { content: "foobar" }
value = value.replace(/\\(\r\n|\r|\n|\f)/g, '');
node.value = value;
};

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var UNICODE = '\\\\[0-9a-f]{1,6}(\\r\\n|[ \\n\\r\\t\\f])?';
var ESCAPE = '(' + UNICODE + '|\\\\[^\\n\\r\\f0-9a-fA-F])';
var NONPRINTABLE = '\u0000\u0008\u000b\u000e-\u001f\u007f';
var SAFE_URL = new RegExp('^(' + ESCAPE + '|[^\"\'\\(\\)\\\\\\s' + NONPRINTABLE + '])*$', 'i');
module.exports = function(node) {
var value = node.value;
if (value.type !== 'String') {
return;
}
var quote = value.value[0];
var url = value.value.substr(1, value.value.length - 2);
// convert `\\` to `/`
url = url.replace(/\\\\/g, '/');
// remove quotes when safe
// https://www.w3.org/TR/css-syntax-3/#url-unquoted-diagram
if (SAFE_URL.test(url)) {
node.value = {
type: 'Raw',
loc: node.value.loc,
value: url
};
} else {
// use double quotes if string has no double quotes
// otherwise use original quotes
// TODO: make better quote type selection
node.value.value = url.indexOf('"') === -1 ? '"' + url + '"' : quote + url + quote;
}
};

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var resolveName = require('css-tree').property;
var handlers = {
'font': require('./property/font'),
'font-weight': require('./property/font-weight'),
'background': require('./property/background'),
'border': require('./property/border'),
'outline': require('./property/border')
};
module.exports = function compressValue(node) {
if (!this.declaration) {
return;
}
var property = resolveName(this.declaration.property);
if (handlers.hasOwnProperty(property.basename)) {
handlers[property.basename](node);
}
};

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module.exports = function(node) {
node.block.children.each(function(rule) {
rule.prelude.children.each(function(simpleselector) {
simpleselector.children.each(function(data, item) {
if (data.type === 'Percentage' && data.value === '100') {
item.data = {
type: 'TypeSelector',
loc: data.loc,
name: 'to'
};
} else if (data.type === 'TypeSelector' && data.name === 'from') {
item.data = {
type: 'Percentage',
loc: data.loc,
value: '0'
};
}
});
});
});
};

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var lexer = require('css-tree').lexer;
var packNumber = require('./Number').pack;
// http://www.w3.org/TR/css3-color/#svg-color
var NAME_TO_HEX = {
'aliceblue': 'f0f8ff',
'antiquewhite': 'faebd7',
'aqua': '0ff',
'aquamarine': '7fffd4',
'azure': 'f0ffff',
'beige': 'f5f5dc',
'bisque': 'ffe4c4',
'black': '000',
'blanchedalmond': 'ffebcd',
'blue': '00f',
'blueviolet': '8a2be2',
'brown': 'a52a2a',
'burlywood': 'deb887',
'cadetblue': '5f9ea0',
'chartreuse': '7fff00',
'chocolate': 'd2691e',
'coral': 'ff7f50',
'cornflowerblue': '6495ed',
'cornsilk': 'fff8dc',
'crimson': 'dc143c',
'cyan': '0ff',
'darkblue': '00008b',
'darkcyan': '008b8b',
'darkgoldenrod': 'b8860b',
'darkgray': 'a9a9a9',
'darkgrey': 'a9a9a9',
'darkgreen': '006400',
'darkkhaki': 'bdb76b',
'darkmagenta': '8b008b',
'darkolivegreen': '556b2f',
'darkorange': 'ff8c00',
'darkorchid': '9932cc',
'darkred': '8b0000',
'darksalmon': 'e9967a',
'darkseagreen': '8fbc8f',
'darkslateblue': '483d8b',
'darkslategray': '2f4f4f',
'darkslategrey': '2f4f4f',
'darkturquoise': '00ced1',
'darkviolet': '9400d3',
'deeppink': 'ff1493',
'deepskyblue': '00bfff',
'dimgray': '696969',
'dimgrey': '696969',
'dodgerblue': '1e90ff',
'firebrick': 'b22222',
'floralwhite': 'fffaf0',
'forestgreen': '228b22',
'fuchsia': 'f0f',
'gainsboro': 'dcdcdc',
'ghostwhite': 'f8f8ff',
'gold': 'ffd700',
'goldenrod': 'daa520',
'gray': '808080',
'grey': '808080',
'green': '008000',
'greenyellow': 'adff2f',
'honeydew': 'f0fff0',
'hotpink': 'ff69b4',
'indianred': 'cd5c5c',
'indigo': '4b0082',
'ivory': 'fffff0',
'khaki': 'f0e68c',
'lavender': 'e6e6fa',
'lavenderblush': 'fff0f5',
'lawngreen': '7cfc00',
'lemonchiffon': 'fffacd',
'lightblue': 'add8e6',
'lightcoral': 'f08080',
'lightcyan': 'e0ffff',
'lightgoldenrodyellow': 'fafad2',
'lightgray': 'd3d3d3',
'lightgrey': 'd3d3d3',
'lightgreen': '90ee90',
'lightpink': 'ffb6c1',
'lightsalmon': 'ffa07a',
'lightseagreen': '20b2aa',
'lightskyblue': '87cefa',
'lightslategray': '789',
'lightslategrey': '789',
'lightsteelblue': 'b0c4de',
'lightyellow': 'ffffe0',
'lime': '0f0',
'limegreen': '32cd32',
'linen': 'faf0e6',
'magenta': 'f0f',
'maroon': '800000',
'mediumaquamarine': '66cdaa',
'mediumblue': '0000cd',
'mediumorchid': 'ba55d3',
'mediumpurple': '9370db',
'mediumseagreen': '3cb371',
'mediumslateblue': '7b68ee',
'mediumspringgreen': '00fa9a',
'mediumturquoise': '48d1cc',
'mediumvioletred': 'c71585',
'midnightblue': '191970',
'mintcream': 'f5fffa',
'mistyrose': 'ffe4e1',
'moccasin': 'ffe4b5',
'navajowhite': 'ffdead',
'navy': '000080',
'oldlace': 'fdf5e6',
'olive': '808000',
'olivedrab': '6b8e23',
'orange': 'ffa500',
'orangered': 'ff4500',
'orchid': 'da70d6',
'palegoldenrod': 'eee8aa',
'palegreen': '98fb98',
'paleturquoise': 'afeeee',
'palevioletred': 'db7093',
'papayawhip': 'ffefd5',
'peachpuff': 'ffdab9',
'peru': 'cd853f',
'pink': 'ffc0cb',
'plum': 'dda0dd',
'powderblue': 'b0e0e6',
'purple': '800080',
'rebeccapurple': '639',
'red': 'f00',
'rosybrown': 'bc8f8f',
'royalblue': '4169e1',
'saddlebrown': '8b4513',
'salmon': 'fa8072',
'sandybrown': 'f4a460',
'seagreen': '2e8b57',
'seashell': 'fff5ee',
'sienna': 'a0522d',
'silver': 'c0c0c0',
'skyblue': '87ceeb',
'slateblue': '6a5acd',
'slategray': '708090',
'slategrey': '708090',
'snow': 'fffafa',
'springgreen': '00ff7f',
'steelblue': '4682b4',
'tan': 'd2b48c',
'teal': '008080',
'thistle': 'd8bfd8',
'tomato': 'ff6347',
'turquoise': '40e0d0',
'violet': 'ee82ee',
'wheat': 'f5deb3',
'white': 'fff',
'whitesmoke': 'f5f5f5',
'yellow': 'ff0',
'yellowgreen': '9acd32'
};
var HEX_TO_NAME = {
'800000': 'maroon',
'800080': 'purple',
'808000': 'olive',
'808080': 'gray',
'00ffff': 'cyan',
'f0ffff': 'azure',
'f5f5dc': 'beige',
'ffe4c4': 'bisque',
'000000': 'black',
'0000ff': 'blue',
'a52a2a': 'brown',
'ff7f50': 'coral',
'ffd700': 'gold',
'008000': 'green',
'4b0082': 'indigo',
'fffff0': 'ivory',
'f0e68c': 'khaki',
'00ff00': 'lime',
'faf0e6': 'linen',
'000080': 'navy',
'ffa500': 'orange',
'da70d6': 'orchid',
'cd853f': 'peru',
'ffc0cb': 'pink',
'dda0dd': 'plum',
'f00': 'red',
'ff0000': 'red',
'fa8072': 'salmon',
'a0522d': 'sienna',
'c0c0c0': 'silver',
'fffafa': 'snow',
'd2b48c': 'tan',
'008080': 'teal',
'ff6347': 'tomato',
'ee82ee': 'violet',
'f5deb3': 'wheat',
'ffffff': 'white',
'ffff00': 'yellow'
};
function hueToRgb(p, q, t) {
if (t < 0) {
t += 1;
}
if (t > 1) {
t -= 1;
}
if (t < 1 / 6) {
return p + (q - p) * 6 * t;
}
if (t < 1 / 2) {
return q;
}
if (t < 2 / 3) {
return p + (q - p) * (2 / 3 - t) * 6;
}
return p;
}
function hslToRgb(h, s, l, a) {
var r;
var g;
var b;
if (s === 0) {
r = g = b = l; // achromatic
} else {
var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
var p = 2 * l - q;
r = hueToRgb(p, q, h + 1 / 3);
g = hueToRgb(p, q, h);
b = hueToRgb(p, q, h - 1 / 3);
}
return [
Math.round(r * 255),
Math.round(g * 255),
Math.round(b * 255),
a
];
}
function toHex(value) {
value = value.toString(16);
return value.length === 1 ? '0' + value : value;
}
function parseFunctionArgs(functionArgs, count, rgb) {
var cursor = functionArgs.head;
var args = [];
var wasValue = false;
while (cursor !== null) {
var node = cursor.data;
var type = node.type;
switch (type) {
case 'Number':
case 'Percentage':
if (wasValue) {
return;
}
wasValue = true;
args.push({
type: type,
value: Number(node.value)
});
break;
case 'Operator':
if (node.value === ',') {
if (!wasValue) {
return;
}
wasValue = false;
} else if (wasValue || node.value !== '+') {
return;
}
break;
default:
// something we couldn't understand
return;
}
cursor = cursor.next;
}
if (args.length !== count) {
// invalid arguments count
// TODO: remove those tokens
return;
}
if (args.length === 4) {
if (args[3].type !== 'Number') {
// 4th argument should be a number
// TODO: remove those tokens
return;
}
args[3].type = 'Alpha';
}
if (rgb) {
if (args[0].type !== args[1].type || args[0].type !== args[2].type) {
// invalid color, numbers and percentage shouldn't be mixed
// TODO: remove those tokens
return;
}
} else {
if (args[0].type !== 'Number' ||
args[1].type !== 'Percentage' ||
args[2].type !== 'Percentage') {
// invalid color, for hsl values should be: number, percentage, percentage
// TODO: remove those tokens
return;
}
args[0].type = 'Angle';
}
return args.map(function(arg) {
var value = Math.max(0, arg.value);
switch (arg.type) {
case 'Number':
// fit value to [0..255] range
value = Math.min(value, 255);
break;
case 'Percentage':
// convert 0..100% to value in [0..255] range
value = Math.min(value, 100) / 100;
if (!rgb) {
return value;
}
value = 255 * value;
break;
case 'Angle':
// fit value to (-360..360) range
return (((value % 360) + 360) % 360) / 360;
case 'Alpha':
// fit value to [0..1] range
return Math.min(value, 1);
}
return Math.round(value);
});
}
function compressFunction(node, item, list) {
var functionName = node.name;
var args;
if (functionName === 'rgba' || functionName === 'hsla') {
args = parseFunctionArgs(node.children, 4, functionName === 'rgba');
if (!args) {
// something went wrong
return;
}
if (functionName === 'hsla') {
args = hslToRgb.apply(null, args);
node.name = 'rgba';
}
if (args[3] === 0) {
// try to replace `rgba(x, x, x, 0)` to `transparent`
// always replace `rgba(0, 0, 0, 0)` to `transparent`
// otherwise avoid replacement in gradients since it may break color transition
// http://stackoverflow.com/questions/11829410/css3-gradient-rendering-issues-from-transparent-to-white
var scopeFunctionName = this.function && this.function.name;
if ((args[0] === 0 && args[1] === 0 && args[2] === 0) ||
!/^(?:to|from|color-stop)$|gradient$/i.test(scopeFunctionName)) {
item.data = {
type: 'Identifier',
loc: node.loc,
name: 'transparent'
};
return;
}
}
if (args[3] !== 1) {
// replace argument values for normalized/interpolated
node.children.each(function(node, item, list) {
if (node.type === 'Operator') {
if (node.value !== ',') {
list.remove(item);
}
return;
}
item.data = {
type: 'Number',
loc: node.loc,
value: packNumber(args.shift(), null)
};
});
return;
}
// otherwise convert to rgb, i.e. rgba(255, 0, 0, 1) -> rgb(255, 0, 0)
functionName = 'rgb';
}
if (functionName === 'hsl') {
args = args || parseFunctionArgs(node.children, 3, false);
if (!args) {
// something went wrong
return;
}
// convert to rgb
args = hslToRgb.apply(null, args);
functionName = 'rgb';
}
if (functionName === 'rgb') {
args = args || parseFunctionArgs(node.children, 3, true);
if (!args) {
// something went wrong
return;
}
// check if color is not at the end and not followed by space
var next = item.next;
if (next && next.data.type !== 'WhiteSpace') {
list.insert(list.createItem({
type: 'WhiteSpace',
value: ' '
}), next);
}
item.data = {
type: 'Hash',
loc: node.loc,
value: toHex(args[0]) + toHex(args[1]) + toHex(args[2])
};
compressHex(item.data, item);
}
}
function compressIdent(node, item) {
if (this.declaration === null) {
return;
}
var color = node.name.toLowerCase();
if (NAME_TO_HEX.hasOwnProperty(color) &&
lexer.matchDeclaration(this.declaration).isType(node, 'color')) {
var hex = NAME_TO_HEX[color];
if (hex.length + 1 <= color.length) {
// replace for shorter hex value
item.data = {
type: 'Hash',
loc: node.loc,
value: hex
};
} else {
// special case for consistent colors
if (color === 'grey') {
color = 'gray';
}
// just replace value for lower cased name
node.name = color;
}
}
}
function compressHex(node, item) {
var color = node.value.toLowerCase();
// #112233 -> #123
if (color.length === 6 &&
color[0] === color[1] &&
color[2] === color[3] &&
color[4] === color[5]) {
color = color[0] + color[2] + color[4];
}
if (HEX_TO_NAME[color]) {
item.data = {
type: 'Identifier',
loc: node.loc,
name: HEX_TO_NAME[color]
};
} else {
node.value = color;
}
}
module.exports = {
compressFunction: compressFunction,
compressIdent: compressIdent,
compressHex: compressHex
};

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var walk = require('css-tree').walk;
var handlers = {
Atrule: require('./Atrule'),
AttributeSelector: require('./AttributeSelector'),
Value: require('./Value'),
Dimension: require('./Dimension'),
Percentage: require('./Percentage'),
Number: require('./Number'),
String: require('./String'),
Url: require('./Url'),
Hash: require('./color').compressHex,
Identifier: require('./color').compressIdent,
Function: require('./color').compressFunction
};
module.exports = function(ast) {
walk(ast, {
leave: function(node, item, list) {
if (handlers.hasOwnProperty(node.type)) {
handlers[node.type].call(this, node, item, list);
}
}
});
};

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assets_old/node_modules/csso/lib/replace/property/background.js generated vendored Normal file
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var List = require('css-tree').List;
module.exports = function compressBackground(node) {
function lastType() {
if (buffer.length) {
return buffer[buffer.length - 1].type;
}
}
function flush() {
if (lastType() === 'WhiteSpace') {
buffer.pop();
}
if (!buffer.length) {
buffer.unshift(
{
type: 'Number',
loc: null,
value: '0'
},
{
type: 'WhiteSpace',
value: ' '
},
{
type: 'Number',
loc: null,
value: '0'
}
);
}
newValue.push.apply(newValue, buffer);
buffer = [];
}
var newValue = [];
var buffer = [];
node.children.each(function(node) {
if (node.type === 'Operator' && node.value === ',') {
flush();
newValue.push(node);
return;
}
// remove defaults
if (node.type === 'Identifier') {
if (node.name === 'transparent' ||
node.name === 'none' ||
node.name === 'repeat' ||
node.name === 'scroll') {
return;
}
}
// don't add redundant spaces
if (node.type === 'WhiteSpace' && (!buffer.length || lastType() === 'WhiteSpace')) {
return;
}
buffer.push(node);
});
flush();
node.children = new List().fromArray(newValue);
};

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assets_old/node_modules/csso/lib/replace/property/border.js generated vendored Normal file
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function removeItemAndRedundantWhiteSpace(list, item) {
var prev = item.prev;
var next = item.next;
if (next !== null) {
if (next.data.type === 'WhiteSpace' && (prev === null || prev.data.type === 'WhiteSpace')) {
list.remove(next);
}
} else if (prev !== null && prev.data.type === 'WhiteSpace') {
list.remove(prev);
}
list.remove(item);
}
module.exports = function compressBorder(node) {
node.children.each(function(node, item, list) {
if (node.type === 'Identifier' && node.name.toLowerCase() === 'none') {
if (list.head === list.tail) {
// replace `none` for zero when `none` is a single term
item.data = {
type: 'Number',
loc: node.loc,
value: '0'
};
} else {
removeItemAndRedundantWhiteSpace(list, item);
}
}
});
};

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assets_old/node_modules/csso/lib/replace/property/font-weight.js generated vendored Normal file
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module.exports = function compressFontWeight(node) {
var value = node.children.head.data;
if (value.type === 'Identifier') {
switch (value.name) {
case 'normal':
node.children.head.data = {
type: 'Number',
loc: value.loc,
value: '400'
};
break;
case 'bold':
node.children.head.data = {
type: 'Number',
loc: value.loc,
value: '700'
};
break;
}
}
};

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assets_old/node_modules/csso/lib/replace/property/font.js generated vendored Normal file
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module.exports = function compressFont(node) {
var list = node.children;
list.eachRight(function(node, item) {
if (node.type === 'Identifier') {
if (node.name === 'bold') {
item.data = {
type: 'Number',
loc: node.loc,
value: '700'
};
} else if (node.name === 'normal') {
var prev = item.prev;
if (prev && prev.data.type === 'Operator' && prev.data.value === '/') {
this.remove(prev);
}
this.remove(item);
} else if (node.name === 'medium') {
var next = item.next;
if (!next || next.data.type !== 'Operator') {
this.remove(item);
}
}
}
});
// remove redundant spaces
list.each(function(node, item) {
if (node.type === 'WhiteSpace') {
if (!item.prev || !item.next || item.next.data.type === 'WhiteSpace') {
this.remove(item);
}
}
});
if (list.isEmpty()) {
list.insert(list.createItem({
type: 'Identifier',
name: 'normal'
}));
}
};

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assets_old/node_modules/csso/lib/restructure/1-mergeAtrule.js generated vendored Normal file
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var List = require('css-tree').List;
var resolveKeyword = require('css-tree').keyword;
var hasOwnProperty = Object.prototype.hasOwnProperty;
var walk = require('css-tree').walk;
function addRuleToMap(map, item, list, single) {
var node = item.data;
var name = resolveKeyword(node.name).basename;
var id = node.name.toLowerCase() + '/' + (node.prelude ? node.prelude.id : null);
if (!hasOwnProperty.call(map, name)) {
map[name] = Object.create(null);
}
if (single) {
delete map[name][id];
}
if (!hasOwnProperty.call(map[name], id)) {
map[name][id] = new List();
}
map[name][id].append(list.remove(item));
}
function relocateAtrules(ast, options) {
var collected = Object.create(null);
var topInjectPoint = null;
ast.children.each(function(node, item, list) {
if (node.type === 'Atrule') {
var name = resolveKeyword(node.name).basename;
switch (name) {
case 'keyframes':
addRuleToMap(collected, item, list, true);
return;
case 'media':
if (options.forceMediaMerge) {
addRuleToMap(collected, item, list, false);
return;
}
break;
}
if (topInjectPoint === null &&
name !== 'charset' &&
name !== 'import') {
topInjectPoint = item;
}
} else {
if (topInjectPoint === null) {
topInjectPoint = item;
}
}
});
for (var atrule in collected) {
for (var id in collected[atrule]) {
ast.children.insertList(
collected[atrule][id],
atrule === 'media' ? null : topInjectPoint
);
}
}
};
function isMediaRule(node) {
return node.type === 'Atrule' && node.name === 'media';
}
function processAtrule(node, item, list) {
if (!isMediaRule(node)) {
return;
}
var prev = item.prev && item.prev.data;
if (!prev || !isMediaRule(prev)) {
return;
}
// merge @media with same query
if (node.prelude &&
prev.prelude &&
node.prelude.id === prev.prelude.id) {
prev.block.children.appendList(node.block.children);
list.remove(item);
// TODO: use it when we can refer to several points in source
// prev.loc = {
// primary: prev.loc,
// merged: node.loc
// };
}
}
module.exports = function rejoinAtrule(ast, options) {
relocateAtrules(ast, options);
walk(ast, {
visit: 'Atrule',
reverse: true,
enter: processAtrule
});
};

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var walk = require('css-tree').walk;
var utils = require('./utils');
function processRule(node, item, list) {
var selectors = node.prelude.children;
var declarations = node.block.children;
list.prevUntil(item.prev, function(prev) {
// skip non-ruleset node if safe
if (prev.type !== 'Rule') {
return utils.unsafeToSkipNode.call(selectors, prev);
}
var prevSelectors = prev.prelude.children;
var prevDeclarations = prev.block.children;
// try to join rulesets with equal pseudo signature
if (node.pseudoSignature === prev.pseudoSignature) {
// try to join by selectors
if (utils.isEqualSelectors(prevSelectors, selectors)) {
prevDeclarations.appendList(declarations);
list.remove(item);
return true;
}
// try to join by declarations
if (utils.isEqualDeclarations(declarations, prevDeclarations)) {
utils.addSelectors(prevSelectors, selectors);
list.remove(item);
return true;
}
}
// go to prev ruleset if has no selector similarities
return utils.hasSimilarSelectors(selectors, prevSelectors);
});
}
// NOTE: direction should be left to right, since rulesets merge to left
// ruleset. When direction right to left unmerged rulesets may prevent lookup
// TODO: remove initial merge
module.exports = function initialMergeRule(ast) {
walk(ast, {
visit: 'Rule',
enter: processRule
});
};

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var List = require('css-tree').List;
var walk = require('css-tree').walk;
function processRule(node, item, list) {
var selectors = node.prelude.children;
// generate new rule sets:
// .a, .b { color: red; }
// ->
// .a { color: red; }
// .b { color: red; }
// while there are more than 1 simple selector split for rulesets
while (selectors.head !== selectors.tail) {
var newSelectors = new List();
newSelectors.insert(selectors.remove(selectors.head));
list.insert(list.createItem({
type: 'Rule',
loc: node.loc,
prelude: {
type: 'SelectorList',
loc: node.prelude.loc,
children: newSelectors
},
block: {
type: 'Block',
loc: node.block.loc,
children: node.block.children.copy()
},
pseudoSignature: node.pseudoSignature
}), item);
}
}
module.exports = function disjoinRule(ast) {
walk(ast, {
visit: 'Rule',
reverse: true,
enter: processRule
});
};

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var List = require('css-tree').List;
var generate = require('css-tree').generate;
var walk = require('css-tree').walk;
var REPLACE = 1;
var REMOVE = 2;
var TOP = 0;
var RIGHT = 1;
var BOTTOM = 2;
var LEFT = 3;
var SIDES = ['top', 'right', 'bottom', 'left'];
var SIDE = {
'margin-top': 'top',
'margin-right': 'right',
'margin-bottom': 'bottom',
'margin-left': 'left',
'padding-top': 'top',
'padding-right': 'right',
'padding-bottom': 'bottom',
'padding-left': 'left',
'border-top-color': 'top',
'border-right-color': 'right',
'border-bottom-color': 'bottom',
'border-left-color': 'left',
'border-top-width': 'top',
'border-right-width': 'right',
'border-bottom-width': 'bottom',
'border-left-width': 'left',
'border-top-style': 'top',
'border-right-style': 'right',
'border-bottom-style': 'bottom',
'border-left-style': 'left'
};
var MAIN_PROPERTY = {
'margin': 'margin',
'margin-top': 'margin',
'margin-right': 'margin',
'margin-bottom': 'margin',
'margin-left': 'margin',
'padding': 'padding',
'padding-top': 'padding',
'padding-right': 'padding',
'padding-bottom': 'padding',
'padding-left': 'padding',
'border-color': 'border-color',
'border-top-color': 'border-color',
'border-right-color': 'border-color',
'border-bottom-color': 'border-color',
'border-left-color': 'border-color',
'border-width': 'border-width',
'border-top-width': 'border-width',
'border-right-width': 'border-width',
'border-bottom-width': 'border-width',
'border-left-width': 'border-width',
'border-style': 'border-style',
'border-top-style': 'border-style',
'border-right-style': 'border-style',
'border-bottom-style': 'border-style',
'border-left-style': 'border-style'
};
function TRBL(name) {
this.name = name;
this.loc = null;
this.iehack = undefined;
this.sides = {
'top': null,
'right': null,
'bottom': null,
'left': null
};
}
TRBL.prototype.getValueSequence = function(declaration, count) {
var values = [];
var iehack = '';
var hasBadValues = declaration.value.type !== 'Value' || declaration.value.children.some(function(child) {
var special = false;
switch (child.type) {
case 'Identifier':
switch (child.name) {
case '\\0':
case '\\9':
iehack = child.name;
return;
case 'inherit':
case 'initial':
case 'unset':
case 'revert':
special = child.name;
break;
}
break;
case 'Dimension':
switch (child.unit) {
// is not supported until IE11
case 'rem':
// v* units is too buggy across browsers and better
// don't merge values with those units
case 'vw':
case 'vh':
case 'vmin':
case 'vmax':
case 'vm': // IE9 supporting "vm" instead of "vmin".
special = child.unit;
break;
}
break;
case 'Hash': // color
case 'Number':
case 'Percentage':
break;
case 'Function':
if (child.name === 'var') {
return true;
}
special = child.name;
break;
case 'WhiteSpace':
return false; // ignore space
default:
return true; // bad value
}
values.push({
node: child,
special: special,
important: declaration.important
});
});
if (hasBadValues || values.length > count) {
return false;
}
if (typeof this.iehack === 'string' && this.iehack !== iehack) {
return false;
}
this.iehack = iehack; // move outside
return values;
};
TRBL.prototype.canOverride = function(side, value) {
var currentValue = this.sides[side];
return !currentValue || (value.important && !currentValue.important);
};
TRBL.prototype.add = function(name, declaration) {
function attemptToAdd() {
var sides = this.sides;
var side = SIDE[name];
if (side) {
if (side in sides === false) {
return false;
}
var values = this.getValueSequence(declaration, 1);
if (!values || !values.length) {
return false;
}
// can mix only if specials are equal
for (var key in sides) {
if (sides[key] !== null && sides[key].special !== values[0].special) {
return false;
}
}
if (!this.canOverride(side, values[0])) {
return true;
}
sides[side] = values[0];
return true;
} else if (name === this.name) {
var values = this.getValueSequence(declaration, 4);
if (!values || !values.length) {
return false;
}
switch (values.length) {
case 1:
values[RIGHT] = values[TOP];
values[BOTTOM] = values[TOP];
values[LEFT] = values[TOP];
break;
case 2:
values[BOTTOM] = values[TOP];
values[LEFT] = values[RIGHT];
break;
case 3:
values[LEFT] = values[RIGHT];
break;
}
// can mix only if specials are equal
for (var i = 0; i < 4; i++) {
for (var key in sides) {
if (sides[key] !== null && sides[key].special !== values[i].special) {
return false;
}
}
}
for (var i = 0; i < 4; i++) {
if (this.canOverride(SIDES[i], values[i])) {
sides[SIDES[i]] = values[i];
}
}
return true;
}
}
if (!attemptToAdd.call(this)) {
return false;
}
// TODO: use it when we can refer to several points in source
// if (this.loc) {
// this.loc = {
// primary: this.loc,
// merged: declaration.loc
// };
// } else {
// this.loc = declaration.loc;
// }
if (!this.loc) {
this.loc = declaration.loc;
}
return true;
};
TRBL.prototype.isOkToMinimize = function() {
var top = this.sides.top;
var right = this.sides.right;
var bottom = this.sides.bottom;
var left = this.sides.left;
if (top && right && bottom && left) {
var important =
top.important +
right.important +
bottom.important +
left.important;
return important === 0 || important === 4;
}
return false;
};
TRBL.prototype.getValue = function() {
var result = new List();
var sides = this.sides;
var values = [
sides.top,
sides.right,
sides.bottom,
sides.left
];
var stringValues = [
generate(sides.top.node),
generate(sides.right.node),
generate(sides.bottom.node),
generate(sides.left.node)
];
if (stringValues[LEFT] === stringValues[RIGHT]) {
values.pop();
if (stringValues[BOTTOM] === stringValues[TOP]) {
values.pop();
if (stringValues[RIGHT] === stringValues[TOP]) {
values.pop();
}
}
}
for (var i = 0; i < values.length; i++) {
if (i) {
result.appendData({ type: 'WhiteSpace', value: ' ' });
}
result.appendData(values[i].node);
}
if (this.iehack) {
result.appendData({ type: 'WhiteSpace', value: ' ' });
result.appendData({
type: 'Identifier',
loc: null,
name: this.iehack
});
}
return {
type: 'Value',
loc: null,
children: result
};
};
TRBL.prototype.getDeclaration = function() {
return {
type: 'Declaration',
loc: this.loc,
important: this.sides.top.important,
property: this.name,
value: this.getValue()
};
};
function processRule(rule, shorts, shortDeclarations, lastShortSelector) {
var declarations = rule.block.children;
var selector = rule.prelude.children.first().id;
rule.block.children.eachRight(function(declaration, item) {
var property = declaration.property;
if (!MAIN_PROPERTY.hasOwnProperty(property)) {
return;
}
var key = MAIN_PROPERTY[property];
var shorthand;
var operation;
if (!lastShortSelector || selector === lastShortSelector) {
if (key in shorts) {
operation = REMOVE;
shorthand = shorts[key];
}
}
if (!shorthand || !shorthand.add(property, declaration)) {
operation = REPLACE;
shorthand = new TRBL(key);
// if can't parse value ignore it and break shorthand children
if (!shorthand.add(property, declaration)) {
lastShortSelector = null;
return;
}
}
shorts[key] = shorthand;
shortDeclarations.push({
operation: operation,
block: declarations,
item: item,
shorthand: shorthand
});
lastShortSelector = selector;
});
return lastShortSelector;
}
function processShorthands(shortDeclarations, markDeclaration) {
shortDeclarations.forEach(function(item) {
var shorthand = item.shorthand;
if (!shorthand.isOkToMinimize()) {
return;
}
if (item.operation === REPLACE) {
item.item.data = markDeclaration(shorthand.getDeclaration());
} else {
item.block.remove(item.item);
}
});
}
module.exports = function restructBlock(ast, indexer) {
var stylesheetMap = {};
var shortDeclarations = [];
walk(ast, {
visit: 'Rule',
reverse: true,
enter: function(node) {
var stylesheet = this.block || this.stylesheet;
var ruleId = (node.pseudoSignature || '') + '|' + node.prelude.children.first().id;
var ruleMap;
var shorts;
if (!stylesheetMap.hasOwnProperty(stylesheet.id)) {
ruleMap = {
lastShortSelector: null
};
stylesheetMap[stylesheet.id] = ruleMap;
} else {
ruleMap = stylesheetMap[stylesheet.id];
}
if (ruleMap.hasOwnProperty(ruleId)) {
shorts = ruleMap[ruleId];
} else {
shorts = {};
ruleMap[ruleId] = shorts;
}
ruleMap.lastShortSelector = processRule.call(this, node, shorts, shortDeclarations, ruleMap.lastShortSelector);
}
});
processShorthands(shortDeclarations, indexer.declaration);
};

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var resolveProperty = require('css-tree').property;
var resolveKeyword = require('css-tree').keyword;
var walk = require('css-tree').walk;
var generate = require('css-tree').generate;
var fingerprintId = 1;
var dontRestructure = {
'src': 1 // https://github.com/afelix/csso/issues/50
};
var DONT_MIX_VALUE = {
// https://developer.mozilla.org/en-US/docs/Web/CSS/display#Browser_compatibility
'display': /table|ruby|flex|-(flex)?box$|grid|contents|run-in/i,
// https://developer.mozilla.org/en/docs/Web/CSS/text-align
'text-align': /^(start|end|match-parent|justify-all)$/i
};
var SAFE_VALUES = {
cursor: [
'auto', 'crosshair', 'default', 'move', 'text', 'wait', 'help',
'n-resize', 'e-resize', 's-resize', 'w-resize',
'ne-resize', 'nw-resize', 'se-resize', 'sw-resize',
'pointer', 'progress', 'not-allowed', 'no-drop', 'vertical-text', 'all-scroll',
'col-resize', 'row-resize'
],
overflow: [
'hidden', 'visible', 'scroll', 'auto'
],
position: [
'static', 'relative', 'absolute', 'fixed'
]
};
var NEEDLESS_TABLE = {
'border-width': ['border'],
'border-style': ['border'],
'border-color': ['border'],
'border-top': ['border'],
'border-right': ['border'],
'border-bottom': ['border'],
'border-left': ['border'],
'border-top-width': ['border-top', 'border-width', 'border'],
'border-right-width': ['border-right', 'border-width', 'border'],
'border-bottom-width': ['border-bottom', 'border-width', 'border'],
'border-left-width': ['border-left', 'border-width', 'border'],
'border-top-style': ['border-top', 'border-style', 'border'],
'border-right-style': ['border-right', 'border-style', 'border'],
'border-bottom-style': ['border-bottom', 'border-style', 'border'],
'border-left-style': ['border-left', 'border-style', 'border'],
'border-top-color': ['border-top', 'border-color', 'border'],
'border-right-color': ['border-right', 'border-color', 'border'],
'border-bottom-color': ['border-bottom', 'border-color', 'border'],
'border-left-color': ['border-left', 'border-color', 'border'],
'margin-top': ['margin'],
'margin-right': ['margin'],
'margin-bottom': ['margin'],
'margin-left': ['margin'],
'padding-top': ['padding'],
'padding-right': ['padding'],
'padding-bottom': ['padding'],
'padding-left': ['padding'],
'font-style': ['font'],
'font-variant': ['font'],
'font-weight': ['font'],
'font-size': ['font'],
'font-family': ['font'],
'list-style-type': ['list-style'],
'list-style-position': ['list-style'],
'list-style-image': ['list-style']
};
function getPropertyFingerprint(propertyName, declaration, fingerprints) {
var realName = resolveProperty(propertyName).basename;
if (realName === 'background') {
return propertyName + ':' + generate(declaration.value);
}
var declarationId = declaration.id;
var fingerprint = fingerprints[declarationId];
if (!fingerprint) {
switch (declaration.value.type) {
case 'Value':
var vendorId = '';
var iehack = '';
var special = {};
var raw = false;
declaration.value.children.each(function walk(node) {
switch (node.type) {
case 'Value':
case 'Brackets':
case 'Parentheses':
node.children.each(walk);
break;
case 'Raw':
raw = true;
break;
case 'Identifier':
var name = node.name;
if (!vendorId) {
vendorId = resolveKeyword(name).vendor;
}
if (/\\[09]/.test(name)) {
iehack = RegExp.lastMatch;
}
if (SAFE_VALUES.hasOwnProperty(realName)) {
if (SAFE_VALUES[realName].indexOf(name) === -1) {
special[name] = true;
}
} else if (DONT_MIX_VALUE.hasOwnProperty(realName)) {
if (DONT_MIX_VALUE[realName].test(name)) {
special[name] = true;
}
}
break;
case 'Function':
var name = node.name;
if (!vendorId) {
vendorId = resolveKeyword(name).vendor;
}
if (name === 'rect') {
// there are 2 forms of rect:
// rect(<top>, <right>, <bottom>, <left>) - standart
// rect(<top> <right> <bottom> <left>) – backwards compatible syntax
// only the same form values can be merged
var hasComma = node.children.some(function(node) {
return node.type === 'Operator' && node.value === ',';
});
if (!hasComma) {
name = 'rect-backward';
}
}
special[name + '()'] = true;
// check nested tokens too
node.children.each(walk);
break;
case 'Dimension':
var unit = node.unit;
if (/\\[09]/.test(unit)) {
iehack = RegExp.lastMatch;
}
switch (unit) {
// is not supported until IE11
case 'rem':
// v* units is too buggy across browsers and better
// don't merge values with those units
case 'vw':
case 'vh':
case 'vmin':
case 'vmax':
case 'vm': // IE9 supporting "vm" instead of "vmin".
special[unit] = true;
break;
}
break;
}
});
fingerprint = raw
? '!' + fingerprintId++
: '!' + Object.keys(special).sort() + '|' + iehack + vendorId;
break;
case 'Raw':
fingerprint = '!' + declaration.value.value;
break;
default:
fingerprint = generate(declaration.value);
}
fingerprints[declarationId] = fingerprint;
}
return propertyName + fingerprint;
}
function needless(props, declaration, fingerprints) {
var property = resolveProperty(declaration.property);
if (NEEDLESS_TABLE.hasOwnProperty(property.basename)) {
var table = NEEDLESS_TABLE[property.basename];
for (var i = 0; i < table.length; i++) {
var ppre = getPropertyFingerprint(property.prefix + table[i], declaration, fingerprints);
var prev = props.hasOwnProperty(ppre) ? props[ppre] : null;
if (prev && (!declaration.important || prev.item.data.important)) {
return prev;
}
}
}
}
function processRule(rule, item, list, props, fingerprints) {
var declarations = rule.block.children;
declarations.eachRight(function(declaration, declarationItem) {
var property = declaration.property;
var fingerprint = getPropertyFingerprint(property, declaration, fingerprints);
var prev = props[fingerprint];
if (prev && !dontRestructure.hasOwnProperty(property)) {
if (declaration.important && !prev.item.data.important) {
props[fingerprint] = {
block: declarations,
item: declarationItem
};
prev.block.remove(prev.item);
// TODO: use it when we can refer to several points in source
// declaration.loc = {
// primary: declaration.loc,
// merged: prev.item.data.loc
// };
} else {
declarations.remove(declarationItem);
// TODO: use it when we can refer to several points in source
// prev.item.data.loc = {
// primary: prev.item.data.loc,
// merged: declaration.loc
// };
}
} else {
var prev = needless(props, declaration, fingerprints);
if (prev) {
declarations.remove(declarationItem);
// TODO: use it when we can refer to several points in source
// prev.item.data.loc = {
// primary: prev.item.data.loc,
// merged: declaration.loc
// };
} else {
declaration.fingerprint = fingerprint;
props[fingerprint] = {
block: declarations,
item: declarationItem
};
}
}
});
if (declarations.isEmpty()) {
list.remove(item);
}
}
module.exports = function restructBlock(ast) {
var stylesheetMap = {};
var fingerprints = Object.create(null);
walk(ast, {
visit: 'Rule',
reverse: true,
enter: function(node, item, list) {
var stylesheet = this.block || this.stylesheet;
var ruleId = (node.pseudoSignature || '') + '|' + node.prelude.children.first().id;
var ruleMap;
var props;
if (!stylesheetMap.hasOwnProperty(stylesheet.id)) {
ruleMap = {};
stylesheetMap[stylesheet.id] = ruleMap;
} else {
ruleMap = stylesheetMap[stylesheet.id];
}
if (ruleMap.hasOwnProperty(ruleId)) {
props = ruleMap[ruleId];
} else {
props = {};
ruleMap[ruleId] = props;
}
processRule.call(this, node, item, list, props, fingerprints);
}
});
};

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var walk = require('css-tree').walk;
var utils = require('./utils');
/*
At this step all rules has single simple selector. We try to join by equal
declaration blocks to first rule, e.g.
.a { color: red }
b { ... }
.b { color: red }
->
.a, .b { color: red }
b { ... }
*/
function processRule(node, item, list) {
var selectors = node.prelude.children;
var declarations = node.block.children;
var nodeCompareMarker = selectors.first().compareMarker;
var skippedCompareMarkers = {};
list.nextUntil(item.next, function(next, nextItem) {
// skip non-ruleset node if safe
if (next.type !== 'Rule') {
return utils.unsafeToSkipNode.call(selectors, next);
}
if (node.pseudoSignature !== next.pseudoSignature) {
return true;
}
var nextFirstSelector = next.prelude.children.head;
var nextDeclarations = next.block.children;
var nextCompareMarker = nextFirstSelector.data.compareMarker;
// if next ruleset has same marked as one of skipped then stop joining
if (nextCompareMarker in skippedCompareMarkers) {
return true;
}
// try to join by selectors
if (selectors.head === selectors.tail) {
if (selectors.first().id === nextFirstSelector.data.id) {
declarations.appendList(nextDeclarations);
list.remove(nextItem);
return;
}
}
// try to join by properties
if (utils.isEqualDeclarations(declarations, nextDeclarations)) {
var nextStr = nextFirstSelector.data.id;
selectors.some(function(data, item) {
var curStr = data.id;
if (nextStr < curStr) {
selectors.insert(nextFirstSelector, item);
return true;
}
if (!item.next) {
selectors.insert(nextFirstSelector);
return true;
}
});
list.remove(nextItem);
return;
}
// go to next ruleset if current one can be skipped (has no equal specificity nor element selector)
if (nextCompareMarker === nodeCompareMarker) {
return true;
}
skippedCompareMarkers[nextCompareMarker] = true;
});
}
module.exports = function mergeRule(ast) {
walk(ast, {
visit: 'Rule',
enter: processRule
});
};

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var List = require('css-tree').List;
var walk = require('css-tree').walk;
var utils = require('./utils');
function calcSelectorLength(list) {
var length = 0;
list.each(function(data) {
length += data.id.length + 1;
});
return length - 1;
}
function calcDeclarationsLength(tokens) {
var length = 0;
for (var i = 0; i < tokens.length; i++) {
length += tokens[i].length;
}
return (
length + // declarations
tokens.length - 1 // delimeters
);
}
function processRule(node, item, list) {
var avoidRulesMerge = this.block !== null ? this.block.avoidRulesMerge : false;
var selectors = node.prelude.children;
var block = node.block;
var disallowDownMarkers = Object.create(null);
var allowMergeUp = true;
var allowMergeDown = true;
list.prevUntil(item.prev, function(prev, prevItem) {
var prevBlock = prev.block;
var prevType = prev.type;
if (prevType !== 'Rule') {
var unsafe = utils.unsafeToSkipNode.call(selectors, prev);
if (!unsafe && prevType === 'Atrule' && prevBlock) {
walk(prevBlock, {
visit: 'Rule',
enter: function(node) {
node.prelude.children.each(function(data) {
disallowDownMarkers[data.compareMarker] = true;
});
}
});
}
return unsafe;
}
var prevSelectors = prev.prelude.children;
if (node.pseudoSignature !== prev.pseudoSignature) {
return true;
}
allowMergeDown = !prevSelectors.some(function(selector) {
return selector.compareMarker in disallowDownMarkers;
});
// try prev ruleset if simpleselectors has no equal specifity and element selector
if (!allowMergeDown && !allowMergeUp) {
return true;
}
// try to join by selectors
if (allowMergeUp && utils.isEqualSelectors(prevSelectors, selectors)) {
prevBlock.children.appendList(block.children);
list.remove(item);
return true;
}
// try to join by properties
var diff = utils.compareDeclarations(block.children, prevBlock.children);
// console.log(diff.eq, diff.ne1, diff.ne2);
if (diff.eq.length) {
if (!diff.ne1.length && !diff.ne2.length) {
// equal blocks
if (allowMergeDown) {
utils.addSelectors(selectors, prevSelectors);
list.remove(prevItem);
}
return true;
} else if (!avoidRulesMerge) { /* probably we don't need to prevent those merges for @keyframes
TODO: need to be checked */
if (diff.ne1.length && !diff.ne2.length) {
// prevBlock is subset block
var selectorLength = calcSelectorLength(selectors);
var blockLength = calcDeclarationsLength(diff.eq); // declarations length
if (allowMergeUp && selectorLength < blockLength) {
utils.addSelectors(prevSelectors, selectors);
block.children = new List().fromArray(diff.ne1);
}
} else if (!diff.ne1.length && diff.ne2.length) {
// node is subset of prevBlock
var selectorLength = calcSelectorLength(prevSelectors);
var blockLength = calcDeclarationsLength(diff.eq); // declarations length
if (allowMergeDown && selectorLength < blockLength) {
utils.addSelectors(selectors, prevSelectors);
prevBlock.children = new List().fromArray(diff.ne2);
}
} else {
// diff.ne1.length && diff.ne2.length
// extract equal block
var newSelector = {
type: 'SelectorList',
loc: null,
children: utils.addSelectors(prevSelectors.copy(), selectors)
};
var newBlockLength = calcSelectorLength(newSelector.children) + 2; // selectors length + curly braces length
var blockLength = calcDeclarationsLength(diff.eq); // declarations length
// create new ruleset if declarations length greater than
// ruleset description overhead
if (blockLength >= newBlockLength) {
var newItem = list.createItem({
type: 'Rule',
loc: null,
prelude: newSelector,
block: {
type: 'Block',
loc: null,
children: new List().fromArray(diff.eq)
},
pseudoSignature: node.pseudoSignature
});
block.children = new List().fromArray(diff.ne1);
prevBlock.children = new List().fromArray(diff.ne2overrided);
if (allowMergeUp) {
list.insert(newItem, prevItem);
} else {
list.insert(newItem, item);
}
return true;
}
}
}
}
if (allowMergeUp) {
// TODO: disallow up merge only if any property interception only (i.e. diff.ne2overrided.length > 0);
// await property families to find property interception correctly
allowMergeUp = !prevSelectors.some(function(prevSelector) {
return selectors.some(function(selector) {
return selector.compareMarker === prevSelector.compareMarker;
});
});
}
prevSelectors.each(function(data) {
disallowDownMarkers[data.compareMarker] = true;
});
});
}
module.exports = function restructRule(ast) {
walk(ast, {
visit: 'Rule',
reverse: true,
enter: processRule
});
};

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var prepare = require('./prepare/index');
var mergeAtrule = require('./1-mergeAtrule');
var initialMergeRuleset = require('./2-initialMergeRuleset');
var disjoinRuleset = require('./3-disjoinRuleset');
var restructShorthand = require('./4-restructShorthand');
var restructBlock = require('./6-restructBlock');
var mergeRuleset = require('./7-mergeRuleset');
var restructRuleset = require('./8-restructRuleset');
module.exports = function(ast, options) {
// prepare ast for restructing
var indexer = prepare(ast, options);
options.logger('prepare', ast);
mergeAtrule(ast, options);
options.logger('mergeAtrule', ast);
initialMergeRuleset(ast);
options.logger('initialMergeRuleset', ast);
disjoinRuleset(ast);
options.logger('disjoinRuleset', ast);
restructShorthand(ast, indexer);
options.logger('restructShorthand', ast);
restructBlock(ast);
options.logger('restructBlock', ast);
mergeRuleset(ast);
options.logger('mergeRuleset', ast);
restructRuleset(ast);
options.logger('restructRuleset', ast);
};

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var generate = require('css-tree').generate;
function Index() {
this.seed = 0;
this.map = Object.create(null);
}
Index.prototype.resolve = function(str) {
var index = this.map[str];
if (!index) {
index = ++this.seed;
this.map[str] = index;
}
return index;
};
module.exports = function createDeclarationIndexer() {
var ids = new Index();
return function markDeclaration(node) {
var id = generate(node);
node.id = ids.resolve(id);
node.length = id.length;
node.fingerprint = null;
return node;
};
};

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var resolveKeyword = require('css-tree').keyword;
var walk = require('css-tree').walk;
var generate = require('css-tree').generate;
var createDeclarationIndexer = require('./createDeclarationIndexer');
var processSelector = require('./processSelector');
module.exports = function prepare(ast, options) {
var markDeclaration = createDeclarationIndexer();
walk(ast, {
visit: 'Rule',
enter: function processRule(node) {
node.block.children.each(markDeclaration);
processSelector(node, options.usage);
}
});
walk(ast, {
visit: 'Atrule',
enter: function(node) {
if (node.prelude) {
node.prelude.id = null; // pre-init property to avoid multiple hidden class for generate
node.prelude.id = generate(node.prelude);
}
// compare keyframe selectors by its values
// NOTE: still no clarification about problems with keyframes selector grouping (issue #197)
if (resolveKeyword(node.name).basename === 'keyframes') {
node.block.avoidRulesMerge = true; /* probably we don't need to prevent those merges for @keyframes
TODO: need to be checked */
node.block.children.each(function(rule) {
rule.prelude.children.each(function(simpleselector) {
simpleselector.compareMarker = simpleselector.id;
});
});
}
}
});
return {
declaration: markDeclaration
};
};

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var generate = require('css-tree').generate;
var specificity = require('./specificity');
var nonFreezePseudoElements = {
'first-letter': true,
'first-line': true,
'after': true,
'before': true
};
var nonFreezePseudoClasses = {
'link': true,
'visited': true,
'hover': true,
'active': true,
'first-letter': true,
'first-line': true,
'after': true,
'before': true
};
module.exports = function freeze(node, usageData) {
var pseudos = Object.create(null);
var hasPseudo = false;
node.prelude.children.each(function(simpleSelector) {
var tagName = '*';
var scope = 0;
simpleSelector.children.each(function(node) {
switch (node.type) {
case 'ClassSelector':
if (usageData && usageData.scopes) {
var classScope = usageData.scopes[node.name] || 0;
if (scope !== 0 && classScope !== scope) {
throw new Error('Selector can\'t has classes from different scopes: ' + generate(simpleSelector));
}
scope = classScope;
}
break;
case 'PseudoClassSelector':
var name = node.name.toLowerCase();
if (!nonFreezePseudoClasses.hasOwnProperty(name)) {
pseudos[':' + name] = true;
hasPseudo = true;
}
break;
case 'PseudoElementSelector':
var name = node.name.toLowerCase();
if (!nonFreezePseudoElements.hasOwnProperty(name)) {
pseudos['::' + name] = true;
hasPseudo = true;
}
break;
case 'TypeSelector':
tagName = node.name.toLowerCase();
break;
case 'AttributeSelector':
if (node.flags) {
pseudos['[' + node.flags.toLowerCase() + ']'] = true;
hasPseudo = true;
}
break;
case 'WhiteSpace':
case 'Combinator':
tagName = '*';
break;
}
});
simpleSelector.compareMarker = specificity(simpleSelector).toString();
simpleSelector.id = null; // pre-init property to avoid multiple hidden class
simpleSelector.id = generate(simpleSelector);
if (scope) {
simpleSelector.compareMarker += ':' + scope;
}
if (tagName !== '*') {
simpleSelector.compareMarker += ',' + tagName;
}
});
// add property to all rule nodes to avoid multiple hidden class
node.pseudoSignature = hasPseudo && Object.keys(pseudos).sort().join(',');
};

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module.exports = function specificity(simpleSelector) {
var A = 0;
var B = 0;
var C = 0;
simpleSelector.children.each(function walk(node) {
switch (node.type) {
case 'SelectorList':
case 'Selector':
node.children.each(walk);
break;
case 'IdSelector':
A++;
break;
case 'ClassSelector':
case 'AttributeSelector':
B++;
break;
case 'PseudoClassSelector':
switch (node.name.toLowerCase()) {
case 'not':
node.children.each(walk);
break;
case 'before':
case 'after':
case 'first-line':
case 'first-letter':
C++;
break;
// TODO: support for :nth-*(.. of <SelectorList>), :matches(), :has()
default:
B++;
}
break;
case 'PseudoElementSelector':
C++;
break;
case 'TypeSelector':
// ignore universal selector
if (node.name.charAt(node.name.length - 1) !== '*') {
C++;
}
break;
}
});
return [A, B, C];
};

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var hasOwnProperty = Object.prototype.hasOwnProperty;
function isEqualSelectors(a, b) {
var cursor1 = a.head;
var cursor2 = b.head;
while (cursor1 !== null && cursor2 !== null && cursor1.data.id === cursor2.data.id) {
cursor1 = cursor1.next;
cursor2 = cursor2.next;
}
return cursor1 === null && cursor2 === null;
}
function isEqualDeclarations(a, b) {
var cursor1 = a.head;
var cursor2 = b.head;
while (cursor1 !== null && cursor2 !== null && cursor1.data.id === cursor2.data.id) {
cursor1 = cursor1.next;
cursor2 = cursor2.next;
}
return cursor1 === null && cursor2 === null;
}
function compareDeclarations(declarations1, declarations2) {
var result = {
eq: [],
ne1: [],
ne2: [],
ne2overrided: []
};
var fingerprints = Object.create(null);
var declarations2hash = Object.create(null);
for (var cursor = declarations2.head; cursor; cursor = cursor.next) {
declarations2hash[cursor.data.id] = true;
}
for (var cursor = declarations1.head; cursor; cursor = cursor.next) {
var data = cursor.data;
if (data.fingerprint) {
fingerprints[data.fingerprint] = data.important;
}
if (declarations2hash[data.id]) {
declarations2hash[data.id] = false;
result.eq.push(data);
} else {
result.ne1.push(data);
}
}
for (var cursor = declarations2.head; cursor; cursor = cursor.next) {
var data = cursor.data;
if (declarations2hash[data.id]) {
// when declarations1 has an overriding declaration, this is not a difference
// unless no !important is used on prev and !important is used on the following
if (!hasOwnProperty.call(fingerprints, data.fingerprint) ||
(!fingerprints[data.fingerprint] && data.important)) {
result.ne2.push(data);
}
result.ne2overrided.push(data);
}
}
return result;
}
function addSelectors(dest, source) {
source.each(function(sourceData) {
var newStr = sourceData.id;
var cursor = dest.head;
while (cursor) {
var nextStr = cursor.data.id;
if (nextStr === newStr) {
return;
}
if (nextStr > newStr) {
break;
}
cursor = cursor.next;
}
dest.insert(dest.createItem(sourceData), cursor);
});
return dest;
}
// check if simpleselectors has no equal specificity and element selector
function hasSimilarSelectors(selectors1, selectors2) {
var cursor1 = selectors1.head;
while (cursor1 !== null) {
var cursor2 = selectors2.head;
while (cursor2 !== null) {
if (cursor1.data.compareMarker === cursor2.data.compareMarker) {
return true;
}
cursor2 = cursor2.next;
}
cursor1 = cursor1.next;
}
return false;
}
// test node can't to be skipped
function unsafeToSkipNode(node) {
switch (node.type) {
case 'Rule':
// unsafe skip ruleset with selector similarities
return hasSimilarSelectors(node.prelude.children, this);
case 'Atrule':
// can skip at-rules with blocks
if (node.block) {
// unsafe skip at-rule if block contains something unsafe to skip
return node.block.children.some(unsafeToSkipNode, this);
}
break;
case 'Declaration':
return false;
}
// unsafe by default
return true;
}
module.exports = {
isEqualSelectors: isEqualSelectors,
isEqualDeclarations: isEqualDeclarations,
compareDeclarations: compareDeclarations,
addSelectors: addSelectors,
hasSimilarSelectors: hasSimilarSelectors,
unsafeToSkipNode: unsafeToSkipNode
};

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var hasOwnProperty = Object.prototype.hasOwnProperty;
function buildMap(list, caseInsensitive) {
var map = Object.create(null);
if (!Array.isArray(list)) {
return null;
}
for (var i = 0; i < list.length; i++) {
var name = list[i];
if (caseInsensitive) {
name = name.toLowerCase();
}
map[name] = true;
}
return map;
}
function buildList(data) {
if (!data) {
return null;
}
var tags = buildMap(data.tags, true);
var ids = buildMap(data.ids);
var classes = buildMap(data.classes);
if (tags === null &&
ids === null &&
classes === null) {
return null;
}
return {
tags: tags,
ids: ids,
classes: classes
};
}
function buildIndex(data) {
var scopes = false;
if (data.scopes && Array.isArray(data.scopes)) {
scopes = Object.create(null);
for (var i = 0; i < data.scopes.length; i++) {
var list = data.scopes[i];
if (!list || !Array.isArray(list)) {
throw new Error('Wrong usage format');
}
for (var j = 0; j < list.length; j++) {
var name = list[j];
if (hasOwnProperty.call(scopes, name)) {
throw new Error('Class can\'t be used for several scopes: ' + name);
}
scopes[name] = i + 1;
}
}
}
return {
whitelist: buildList(data),
blacklist: buildList(data.blacklist),
scopes: scopes
};
}
module.exports = {
buildIndex: buildIndex
};

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## 1.1.2
- Rolled back to use spread syntax in object literals since it not supported by nodejs < 8.3 (#145)
## 1.1.1 (November 18, 2020)
- Fixed edge cases in mismatch location computation for `SyntaxMatchError`
## 1.1.0 (November 17, 2020)
- Bumped `mdn-data` to 2.0.14
- Extended `fork()` method to allow append syntax instead of overriding for `types`, `properties` and `atrules`, e.g. `csstree.fork({ types: { color: '| foo | bar' } })`
- Extended lexer API for validation
- Added `Lexer#checkAtruleName(atruleName)`, `Lexer#checkAtrulePrelude(atruleName, prelude)`, `Lexer#checkAtruleDescriptorName(atruleName, descriptorName)` and `Lexer#checkPropertyName(propertyName)`
- Added `Lexer#getAtrule(atruleName, fallbackBasename)` method
- Extended `Lexer#getAtrulePrelude()` and `Lexer#getProperty()` methods to take `fallbackBasename` parameter
- Improved `SyntaxMatchError` location details
- Changed error messages
## 1.0.1 (November 11, 2020)
- Fixed edge cases for parsing of custom property value with a single whitespace when `parseCustomProperty:true`
## 1.0.0 (October 27, 2020)
- Added `onComment` option to parser config
- Added support for `break` and `skip` values in `walk()` to control traversal
- Added `List#reduce()` and `List#reduceRight()` methods
- Bumped `mdn-data` to 2.0.12
- Exposed version of the lib (i.e. `import { version } from 'css-tree'`)
- Fixed `Lexer#dump()` to dump atrules syntaxes as well
- Fixed matching comma separated `<urange>` list (#135)
- Renamed `HexColor` node type into `Hash`
- Removed `element()` specific parsing rules
- Removed `dist/default-syntax.json` from package
## 1.0.0-alpha.39 (December 5, 2019)
- Fixed walker with `visit: "Declaration"` to iterate `DeclarationList` (#114)
## 1.0.0-alpha.38 (November 25, 2019)
- Bumped `mdn-data` to `2.0.6`
- Added initial implmentation for at-rule matching via `Lexer#matchAtrulePrelude()` and `Lexer#matchAtruleDescriptor()` methods
- Added `-moz-control-character-visibility`, `-ms-grid-columns`, `-ms-grid-rows` and `-ms-hyphenate-limit-last` properties to patch (#111)
- Added `flow`, `flow-root` and `table-caption` values to patched `display` (#112)
## 1.0.0-alpha.37 (October 22, 2019)
- Bumped `source-map` version to `^0.6.1` to fix source map generation inconsistency across node.js versions due to mappings sorting bug and v8 moving to [a stable Array#sort](https://v8.dev/blog/array-sort) ([fix commit](https://github.com/mozilla/source-map/commit/f35a2e4212dd025cb5e1fc219e7ac8a4b96c2cc9) in `source-map`)
## 1.0.0-alpha.36 (October 13, 2019)
- Dropped support for Node < 8
- Updated dev deps (fixed `npm audit` issues)
- Reworked build pipeline
- Package provides `dist/csstree.js` and `dist/csstree.min.js` now (instead of single `dist/csstree.js` that was a min version)
- Bundle size (min version) reduced from 191Kb to 158Kb due to some optimisations
- Definition syntax
- Renamed `grammar` into `definitionSyntax` (named per spec)
- Added `compact` option to `generate()` method to avoid formatting (spaces) when possible
- Lexer
- Changed `dump()` method to produce syntaxes in compact form by default
## 1.0.0-alpha.35 (October 7, 2019)
- Walker
- Changed implementation to avoid runtime compilation due to CSP issues (see #91, #109)
- Added `find()`, `findLast()` and `findAll()` methods (e.g. `csstree.find(ast, node => node.type === 'ClassSelector')`)
## 1.0.0-alpha.34 (July 27, 2019)
- Tokenizer
- Added `isBOM()` function
- Added `charCodeCategory()` function
- Removed `firstCharOffset()` function (use `isBOM()` instead)
- Removed `CHARCODE` dictionary
- Removed `INPUT_STREAM_CODE*` dictionaries
- Lexer
- Allowed comments in matching value (just ignore them like whitespaces)
- Increased iteration count in value matching from 10k up to 15k
- Fixed missed `debugger` (#104)
## 1.0.0-alpha.33 (July 11, 2019)
- Lexer
- Fixed low priority productions matching by changing an approach for robust one (#103)
## 1.0.0-alpha.32 (July 11, 2019)
- Lexer
- Fixed low priority productions matching in long `||-` and `&&-` groups (#103)
## 1.0.0-alpha.31 (July 11, 2019)
- Bumped `mdn/data` to `2.0.4` (#99)
- Lexer
- Added [bracketed range notation](https://drafts.csswg.org/css-values-4/#numeric-ranges) support and related refactoring
- Removed `<number-zero-one>`, `<number-one-or-greater>` and `<positive-integer>` from generic types. In fact, types moved to patch, because those types can be expressed in a regular grammar due to bracketed range notation implemented
- Added support for multiple token string matching
- Improved `<custom-ident>` production matching to claim the keyword only if no other unfulfilled production can claim it (#101)
- Improved `<length>` production matching to claim "unitless zero" only if no other unfulfilled production can claim it
- Changed lexer's constructor to prevent generic types override when used
- Fixed large `||`- and `&&`-group matching, matching continues from the beginning on term match (#85)
- Fixed checking that value has `var()` occurrences when value is a string (such values can't be matched on syntax currently and fail with specific error that can be used for ignorance in validation tools)
- Fixed `<declaration-value>` and `<any-value>` matching when a value contains a function, parentheses or braces
## 1.0.0-alpha.30 (July 3, 2019)
- Bumped `mdn/data` to `~2.0.3`
- Removed type removals from `mdn/data` due to lack of some generic types and specific lexer restictions (since lexer was reworked, see below)
- Reduced and updated patches
- Tokenizer
- Reworked tokenizer itself to compliment [CSS Syntax Module Level 3](https://drafts.csswg.org/css-syntax/#tokenization)
- `Tokenizer` class splitted into several abstractions:
- Added `TokenStream` class
- Added `OffsetToLocation` class
- Added `tokenize()` function that creates `TokenStream` instance for given string or updates a `TokenStream` instance passed as second parameter
- Removed `Tokenizer` class
- Removed `Raw` token type
- Renamed `Identifier` token type to `Ident`
- Added token types: `Hash`, `BadString`, `BadUrl`, `Delim`, `Percentage`, `Dimension`, `Colon`, `Semicolon`, `Comma`, `LeftSquareBracket`, `RightSquareBracket`, `LeftParenthesis`, `RightParenthesis`, `LeftCurlyBracket`, `RightCurlyBracket`
- Replaced `Punctuator` with `Delim` token type, that excludes specific characters with its own token type like `Colon`, `Semicolon` etc
- Removed `findCommentEnd`, `findStringEnd`, `findDecimalNumberEnd`, `findNumberEnd`, `findEscapeEnd`, `findIdentifierEnd` and `findUrlRawEnd` helper function
- Removed `SYMBOL_TYPE`, `PUNCTUATION` and `STOP_URL_RAW` dictionaries
- Added `isDigit`, `isHexDigit`, `isUppercaseLetter`, `isLowercaseLetter`, `isLetter`, `isNonAscii`, `isNameStart`, `isName`, `isNonPrintable`, `isNewline`, `isWhiteSpace`, `isValidEscape`, `isIdentifierStart`, `isNumberStart`, `consumeEscaped`, `consumeName`, `consumeNumber` and `consumeBadUrlRemnants` helper functions
- Parser
- Changed parsing algorithms to work with new token type set
- Changed `HexColor` consumption in way to relax checking a value, i.e. now `value` is a sequence of one or more name chars
- Added `&` as a property hack
- Relaxed `var()` parsing to only check that a first arguments is an identifier (not a custom property name as before)
- Lexer
- Reworked syntax matching to relay on token set only (having AST is optional now)
- Extended `Lexer#match()`, `Lexer#matchType()` and `Lexer#matchProperty()` methods to take a string as value, beside AST as a value
- Extended `Lexer#match()` method to take a string as a syntax, beside of syntax descriptor
- Reworked generic types:
- Removed `<attr()>`, `<url>` (moved to patch) and `<progid>` types
- Added types:
- Related to token types: `<ident-token>`, `<function-token>`, `<at-keyword-token>`, `<hash-token>`, `<string-token>`, `<bad-string-token>`, `<url-token>`, `<bad-url-token>`, `<delim-token>`, `<number-token>`, `<percentage-token>`, `<dimension-token>`, `<whitespace-token>`, `<CDO-token>`, `<CDC-token>`, `<colon-token>`, `<semicolon-token>`, `<comma-token>`, `<[-token>`, `<]-token>`, `<(-token>`, `<)-token>`, `<{-token>` and `<}-token>`
- Complex types: `<an-plus-b>`, `<urange>`, `<custom-property-name>`, `<declaration-value>`, `<any-value>` and `<zero>`
- Renamed `<unicode-range>` to `<urange>` as per spec
- Renamed `<expression>` (IE legacy extension) to `<-ms-legacy-expression>` and may to be removed in next releases
## 1.0.0-alpha.29 (May 30, 2018)
- Lexer
- Syntax matching was completely reworked. Now it's token-based and uses state machine. Public API has not changed. However, some internal data structures have changed. Most significal change in syntax match result tree structure, it's became token-based instead of node-based.
- Grammar
- Changed grammar tree format:
- Added `Token` node type to represent a single code point (`<delim-token>`)
- Added `Multiplier` that wraps a single node (`term` property)
- Added `AtKeyword` to represent `<at-keyword-token>`
- Removed `Slash` and `Percent` node types, they are replaced for a node with `Token` type
- Changed `Function` to represent `<function-token>` with no children
- Removed `multiplier` property from `Group`
- Changed `generate()` method:
- Method takes an `options` as second argument now (`generate(node, forceBraces, decorator)` -> `generate(node, options)`). Two options are supported: `forceBraces` and `decorator`
- When a second parameter is a function it treats as `decorate` option value, i.e. `generate(node, fn)` -> `generate(node, { decorate: fn })`
- Decorate function invokes with additional parameter – a reference to a node
- Tokenizer
- Renamed `Atrule` const to `AtKeyword`
## 1.0.0-alpha.28 (February 19, 2018)
- Renamed `lexer.grammar.translate()` method into `generate()`
- Fixed `<'-webkit-font-smoothing'>` and `<'-moz-osx-font-smoothing'>` syntaxes (#75)
- Added vendor keywords for `<'overflow'>` property syntax (#76)
- Pinned `mdn-data` to `~1.1.0` and fixed issues with some updated property syntaxes
## 1.0.0-alpha.27 (January 14, 2018)
- Generator
- Changed node's `generate()` methods invocation, methods now take a node as a single argument and context (i.e. `this`) that have methods: `chunk()`, `node()` and `children()`
- Renamed `translate()` to `generate()` and changed to take `options` argument
- Removed `translateMarkup(ast, enter, leave)` method, use `generate(ast, { decorator: (handlers) => { ... }})` instead
- Removed `translateWithSourceMap(ast)`, use `generate(ast, { sourceMap: true })` instead
- Changed to support for children as an array
- Walker
- Changed `walk()` to take an `options` argument instead of handler, with `enter`, `leave`, `visit` and `reverse` options (`walk(ast, fn)` is still works and equivalent to `walk(ast, { enter: fn })`)
- Removed `walkUp(ast, fn)`, use `walk(ast, { leave: fn })`
- Removed `walkRules(ast, fn)`, use `walk(ast, { visit: 'Rule', enter: fn })` instead
- Removed `walkRulesRight(ast, fn)`, use `walk(ast, { visit: 'Rule', reverse: true, enter: fn })` instead
- Removed `walkDeclarations(ast, fn)`, use `walk(ast, { visit: 'Declaration', enter: fn })` instead
- Changed to support for children as array in most cases (`reverse: true` will fail on arrays since they have no `forEachRight()` method)
- Misc
- List
- Added `List#forEach()` method
- Added `List#forEachRight()` method
- Added `List#filter()` method
- Changed `List#map()` method to return a `List` instance instead of `Array`
- Added `List#push()` method, similar to `List#appendData()` but returns nothing
- Added `List#pop()` method
- Added `List#unshift()` method, similar to `List#prependData()` but returns nothing
- Added `List#shift()` method
- Added `List#prependList()` method
- Changed `List#insert()`, `List#insertData()`, `List#appendList()` and `List#insertList()` methods to return a list that performed an operation
- Changed `keyword()` method
- Changed `name` field to include a vendor prefix
- Added `basename` field to contain a name without a vendor prefix
- Added `custom` field that contain a `true` when keyword is a custom property reference
- Changed `property()` method
- Changed `name` field to include a vendor prefix
- Added `basename` field to contain a name without any prefixes, i.e. a hack and a vendor prefix
- Added `vendorPrefix()` method
- Added `isCustomProperty()` method
## 1.0.0-alpha.26 (November 9, 2017)
- Tokenizer
- Added `Tokenizer#isBalanceEdge()` method
- Removed `Tokenizer.endsWith()` method
- Parser
- Made the parser tolerant to errors by default
- Removed `tolerant` parser option (no parsing modes anymore)
- Removed `property` parser option (a value parsing does not depend on property name anymore)
- Canceled error for a handing semicolon in a block
- Canceled error for unclosed `Brackets`, `Function` and `Parentheses` when EOF is reached
- Fixed error when prelude ends with a comment for at-rules with custom prelude consumer
- Relaxed at-rule parsing:
- Canceled error when EOF is reached after a prelude
- Canceled error for an at-rule with custom block consumer when at-rule has no block (just don't apply consumer in that case)
- Canceled error on at-rule parsing when it occurs outside prelude or block (at-rule is converting to `Raw` node)
- Allowed for any at-rule to have a prelude and a block, even if it's invalid per at-rule syntax (the responsibility for this check is moved to lexer, since it's possible to construct a AST with such errors)
- Made a declaration value a safe parsing point (i.e. error on value parsing lead to a value is turning into `Raw` node, not a declaration as before)
- Excluded surrounding white spaces and comments from a `Raw` node that represents a declaration value
- Changed `Value` parse handler to return a node only with type `Value` (previously it returned a `Raw` node in some cases)
- Fixed issue with `onParseError()` is not invoked for errors occured on selector or declaration value parsing in some cases
- Changed using of `onParseError()` to stop parsing if handler throws an exception
- Lexer
- Changed `grammar.walk()` to invoke passed handler on entering to node rather than on leaving the node
- Improved `grammar.walk()` to take a walk handler pair as an object, i.e. `walk(node, { enter: fn, leave: fn })`
- Changed `Lexer#match*()` methods to take a node of any type, but with a `children` field
- Added `Lexer#match(syntax, node)` method
- Fixed `Lexer#matchType()` method to stop return a positive result for the CSS wide keywords
## 1.0.0-alpha25 (October 9, 2017)
- Parser
- Added fallback node as argument to `onParseError()` handler
- Fixed raw consuming in tolerant mode when selector is invalid (greedy consuming and redundant warnings)
- Fixed exception in tolerant mode caused by unknown at-rule with unclosed block
- Changed handling of semicolons:
- Hanging semicolon inside declaration blocks raise an error or turns into a `Raw` node in tolerant mode instead of being ignored
- Semicolon outside of declaration blocks opens a `Rule` node as part of selector instead of being ignored
- Aligned `parseAtrulePrelude` behaviour to `parseRulePrelude`
- Removed `Raw` node wraping into `AtrulePrelude` when `parseAtrulePrelude` is disabled
- Removed error emitting when at-rule has a custom prelude customer but no prelude is found (it should be validated by a lexer later)
- Generator
- Fixed performance issue with `translateWithSourceMap()`, flattening the string (because of mixing building string and indexing into it) turned it into a quadratic algorithm (approximate numbers can be found in [the quiz created by this case](https://gist.github.com/lahmatiy/ea25d0e623d88ca9848384b5707d52d9))
- Added support for a single solidus hack for `property()`
- Minor fixes for custom errors
## 1.0.0-alpha24 (September 14, 2017)
- Improved CSSTree to be stable for standart build-in objects extension (#58)
- Parser
- Renamed rule's `selector` to `prelude`. The reasons: [spec names this part so](https://www.w3.org/TR/css-syntax-3/#qualified-rule), and this branch can contain not only a selector (`SelectorList`) but also a raw payload (`Raw`). What's changed:
- Renamed `Rule.selector` to `Rule.prelude`
- Renamed `parseSelector` parser option to `parseRulePrelude`
- Removed option for selector parse in `SelectorList`
- Lexer
- Fixed undefined positions in a error when match a syntax to empty or white space only value
- Improved `Lexer#checkStructure()`
- Return a warning as an object with node reference and message
- No exception on unknown node type, return a warning instead
## 1.0.0-alpha23 (September 10, 2017)
- Fixed `Tokenizer#getRawLength()`'s false positive balance match to the end of input in some cases (#56)
- Rename walker's entry point methods to be the same as CSSTree exposed methods (i.e. `walk()`, `walkUp()` etc)
- Rename at-rule's `expression` to `prelude` (since [spec names it so](https://www.w3.org/TR/css-syntax-3/#at-rule))
- `AtruleExpression` node type → `AtrulePrelude`
- `Atrule.expression` field → `Atrule.prelude`
- `parseAtruleExpression` parser's option → `parseAtrulePrelude`
- `atruleExpression` parse context → `atrulePrelude`
- `atruleExpression` walk context reference → `atrulePrelude`
## 1.0.0-alpha22 (September 8, 2017)
- Parser
- Fixed exception on parsing of unclosed `{}-block` in tolerant mode
- Added tolerant mode support for `DeclarationList`
- Added standalone entry point, i.e. default parser can be used via `require('css-tree/lib/parser')` (#47)
- Generator
- Changed generator to produce `+n` when `AnPlusB.a` is `+1` to be "round-trip" with parser
- Added standalone entry point, i.e. default generators can be used via `require('css-tree/lib/generator')`
- Walker
- Added standalone entry point, i.e. default walkers can be used via `require('css-tree/lib/walker')` (#47)
- Lexer
- Added `default` keyword to the list of invalid values for `<custom-ident>` (since it reversed per [spec](https://www.w3.org/TR/css-values/#custom-idents))
- Convertors (`toPlainObject()` and `fromPlainObject()`) moved to `lib/convertor` (entry point is `require('css-tree/lib/convertor')`)
## 1.0.0-alpha21 (September 5, 2017)
- Tokenizer
- Added `Raw` token type
- Improved tokenization of `url()` with raw as url to be more spec complient
- Added `Tokenizer#balance` array computation on token layout
- Added `Tokenizer#getRawLength()` to compute a raw length with respect of block balance
- Added `Tokenizer#getTokenStart(offset)` method to get token start offset by token index
- Added `idx` and `balance` fields to each token of `Tokenizer#dump()` method result
- Parser
- Added `onParseError` option
- Reworked node parsers that consume a `Raw` node to use a new approach. Since now a `Raw` node builds in `parser#Raw()` function only
- Changed semantic of `parser#Raw()`, it takes 5 parameters now (it might to be changed in future)
- Changed `parser#tolerantParse()` to pass a start token index to fallback function instead of source offset
- Fixed `AtruleExpression` consuming in tolerant mode
- Atrule handler to convert an empty `AtruleExpression` node into `null`
- Changed `AtruleExpression` handler to always return a node (before it could return a `null` in some cases)
- Lexer
- Fixed comma match node for `#` multiplier
- Added reference name to `SyntaxReferenceError`
- Additional fixes on custom errors
- Reduced possible corruption of base config by `syntax.fork()`
## 1.0.0-alpha20 (August 28, 2017)
- Tokenizer
- Added `Atrule` token type (`<at-rule-token>` per spec)
- Added `Function` token type (`<function-token>` per spec)
- Added `Url` token type
- Replaced `Tokenizer#getTypes()` method with `Tokenizer#dump()` to get all tokens as an array
- Renamed `Tokenizer.TYPE.Whitespace` to `Tokenizer.TYPE.WhiteSpace`
- Renamed `Tokenizer.findWhitespaceEnd()` to `Tokenizer.findWhiteSpaceEnd()`
- Parser
- Added initial implementation of tollerant mode (turn on by passing `tolerant: true` option). In this mode parse errors are never occour and any invalid part of CSS turns into a `Raw` node. Current safe points: `Atrule`, `AtruleExpression`, `Rule`, `Selector` and `Declaration`. Feature is experimental and further improvements are planned.
- Changed `Atrule.expression` to contain a `AtruleExpression` node or `null` only (other node types is wrapping into a `AtruleExpression` node)
- Renamed `AttributeSelector.operator` to `AttributeSelector.matcher`
- Generator
- `translate()` method is now can take a function as second argument, that recieves every generated chunk. When no function is passed, default handler is used, it concats all the chunks and method returns a string.
- Lexer
- Used [mdn/data](https://github.com/mdn/data) package as source of lexer's grammar instead of local dictionaries
- Added `x` unit to `<resolution>` generic type
- Improved match tree:
- Omited Group (sequences) match nodes
- Omited empty match nodes (for terms with `zero or more` multipliers)
- Added `ASTNode` node type to contain a reference to AST node
- Fixed node duplication (uncompleted match were added to tree)
- Added AST node reference in match nodes
- Added comma match node by `#` multiplier
- Grammar
- Changed `translate()` function to get a handler as third argument (optional). That handler recieves result of node traslation and can be used for decoration purposes. See [example](https://github.com/csstree/docs/blob/04c65af44477b5ea05feb373482898122b2a4528/docs/syntax.html#L619-L627)
- Added `SyntaxParseError` to grammar export
- Reworked group and multipliers representation in syntax tree:
- Replaced `Sequence` for `Group` node type (`Sequence` node type removed)
- Added `explicit` boolean property for `Group`
- Only groups can have a multiplier now (other node types is wrapping into a single term implicit group when multiplier is applied)
- Renamed `nonEmpty` Group's property to `disallowEmpty`
- Added optimisation for syntax tree by dropping redundant root `Group` when it contains a single `Group` term (return this `Group` as a result)
- Changed lexer's match functionality
- Changed `Lexer#matchProperty()` and `Lexer#matchType()` to return an object instead of match tree. A match tree stores in `matched` field when AST is matched to grammar successfully, otherwise an error in `error` field. The result object also has some methods to test AST node against a match tree: `getTrace()`, `isType()`, `isProperty()` and `isKeyword()`
- Added `Lexer#matchDeclaration()` method
- Removed `Lexer#lastMatchError` (error stores in match result object in `error` field)
- Added initial implementation of search for AST segments (new lexer methods: `Lexer#findValueSegments()`, `Lexer#findDeclarationValueSegments()` and `Lexer#findAllSegments`)
- Implemented `SyntaxReferenceError` for unknown property and type references
- Renamed field in resulting object of `property()` function: `variable` → `custom`
- Fixed issue with readonly properties (e.g. `line` and `column`) of `Error` and exception on attempt to write in iOS Safari
## 1.0.0-alpha19 (April 24, 2017)
- Extended `List` class with new methods:
- `List#prepend(item)`
- `List#prependData(data)`
- `List#insertData(data)`
- `List#insertList(list)`
- `List#replace(item, itemOrList)`
## 1.0.0-alpha18 (April 3, 2017)
- Added `atrule` walk context (#39)
- Changed a result of generate method for `AnPlusB`, `AttributeSelector`, `Function`, `MediaFeature` and `Ratio` ([1e95877](https://github.com/csstree/csstree/commit/1e9587710efa8e9338bcf0bc794b4b45f286231d))
- Fixed typo in `List` exception messages (@strarsis, #42)
- Improved tokenizer to convert an input to a string
## 1.0.0-alpha17 (March 13, 2017)
- Implemented new concept of `syntax`
- Changed main `exports` to expose a default syntax
- Defined initial [CSS syntax](lib/syntax/default.js)
- Implemented `createSyntax()` method to create a new syntax from scratch
- Implemented `fork()` method to create a new syntax based on given via extension
- Parser
- Implemented `mediaQueryList` and `mediaQuery` parsing contexts
- Implemented `CDO` and `CDC` node types
- Implemented additional declaration property prefix hacks (`#` and `+`)
- Added support for UTF-16LE BOM
- Added support for `@font-face` at-rule
- Added `chroma()` to legacy IE filter functions
- Improved `HexColor` to consume hex only
- Improved support for `\0` and `\9` hacks (#2)
- Relaxed number check for `Ratio` terms
- Allowed fractal values as a `Ratio` term
- Disallowed zero number as a `Ratio` term
- Changed important clause parsing
- Allowed any identifier for important (to support hacks like `!ie`)
- Store `true` for `important` field in case identifier equals to `important` and string otherwise
- Fixed parse error formatted message rendering to take into account tabs
- Removed exposing of `Parser` class
- Removed `readSelectorSequence()`, `readSequenceFallback()` and `readSelectorSequenceFallback` methods
- Used single universal sequence consumer for `AtruleExpression`, `Selector` and `Value`
- Generator
- Reworked generator to use auto-generated functions based on syntax definition (additional work to be done in next releases)
- Implemented `translateMarkup(ast, before, after)` method for complex cases
- Reworked `translateWithSourceMap` to be more flexible (based on `translateMarkup`, additional work to be done in next releases)
- Walker
- Reworked walker to use auto-generated function based on syntax definition (additional work to be done in next releases)
- Lexer
- Prepared for better extensibility (additional work to be done in next releases)
- Implemented `checkStructure(ast)` method to check AST structure based on syntax definition
- Update syntax dictionaries to latest `mdn/data`
- Add missing `<'offset-position'>` syntax
- Extended `<position>` property with `-webkit-sticky` (@sergejmueller, #37)
- Improved mismatch error position
- Implemented script (`gen:syntax`) to generate AST format reference page (`docs/ast.md`) using syntax definition
## 1.0.0-alpha16 (February 12, 2017)
- Exposed `Parser` class
- Added `startOffset` option to `Tokenizer` (constructor and `setSource()` method)
- Added fallback functions for default (`readSequenceFallback`) and selector (`readSelectorSequenceFallback`) sequence readers
- Fixed edge cases for `AnPlusB`
- Fixed wrong whitespace ignoring in `Selector` consumer
## 1.0.0-alpha15 (February 8, 2017)
- Fixed broken `atruleExpression` context
- Fixed vendor prefix detection in `keyword()` and `property()`
- Fixed `property()` to not lowercase custom property names
- Added `variable` boolean flag in `property()` result
- Renamed `scanner` into `tokenizer`
- Ranamed `syntax` into `lexer`
- Moved `docs/*.html` files to [csstree/docs](https://github.com/csstree/docs) repo
- Added `element()` function for `Value` context (`-moz-element()` supported as well)
- Merged `Universal` node type into `Type`
- Renamed node types:
- `Id` -> `IdSelector`
- `Class` -> `ClassSelector`
- `Type` -> `TypeSelector`
- `Attribute` -> `AttributeSelector`
- `PseudoClass` -> `PseudoClassSelector`
- `PseudoElement` -> `PseudoElementSelector`
- `Hash` -> `HexColor`
- `Space` -> `WhiteSpace`
- `An+B` -> `AnPlusB`
- Removed `Progid` node type
- Relaxed `MediaQuery` consumer to not validate syntax on parse and to include whitespaces in children sequence as is
- Added `WhiteSpace.value` property to store whitespace sequence
- Implemented parser options to specify what should be parsed in details (when option is `false` some part of CSS represents as balanced `Raw`):
- `parseAtruleExpression` – to parse at-rule expressions (`true` by default)
- `parseSelector` – to parse rule's selector (`true` by default)
- `parseValue` - to parse declaration's value (`true` by default)
- `parseCustomProperty` – to parse value and fallback of custom property (`false` by default)
- Changed tokenization to stick leading hyphen minus to identifier token
- Changed selector parsing:
- Don't convert spaces into descendant combinator
- Don't validate selector structure on parsing (selectors may be checked by lexer later)
- Initial refactoring of [docs](https://github.com/csstree/csstree/blob/master/docs)
- Various improvements and fixes
## 1.0.0-alpha14 (February 3, 2017)
- Implemented `DeclarationList`, `MediaQueryList`, `MediaQuery`, `MediaFeature` and `Ratio` node types
- Implemented `declarationList` context (useful to parse HTML `style` attribute content)
- Implemented custom consumers for `@import`, `@media`, `@page` and `@supports` at-rules
- Implemented `atrule` option for `parse()` config, is used for `atruleExpession` context to specify custom consumer for at-rule if any
- Added `Scanner#skipWS()`, `Scanner#eatNonWS()`, `Scanner#consume()` and `Scanner#consumeNonWS()` helper methods
- Added custom consumers for known functional-pseudos, consume unknown functional-pseudo content as balanced `Raw`
- Allowed any `PseudoElement` to be a functional-pseudo (#33)
- Improved walker implementations to reduce GC thrashing by reusing cursors
- Changed `Atrule.block` to contain a `Block` node type only if any
- Changed `Block.loc` positions to include curly brackets
- Changed `Atrule.expression` to store a `null` if no expression
- Changed parser to use `StyleSheet` node type only for top level node (when context is `stylesheet`, that's by default)
- Changed `Parentheses`, `Brackets` and `Function` consumers to use passed sequence reader instead of its own
- Changed `Value` and `AtruleExpression` consumers to use common sequence reader (that reader was used by `Value` consumer before)
- Changed default sequence reader to exclude storage of spaces around `Comma`
- Changed processing of custom properties:
- Consume declaration value as balanced `Raw`
- Consume `var()` fallback value as balanced `Raw`
- Validate first argument of `var()` starts with double dash
- Custom property's value and fallback includes spaces around
- Fixed `Nth` to have a `loc` property
- Fixed `SelectorList.loc` and `Selector.loc` positions to exclude spaces
- Fixed issue Browserify build fail with `default-syntax.json` is not found error (#32, @philschatz)
- Disallowed `Type` selector starting with dash (parser throws an error in this case now)
- Disallowed empty selectors for `Rule` (not sure if it's correct but looks reasonable)
- Removed `>>` combinator support until any browser support (no signals about that yet)
- Removed `PseudoElement.legacy` property
- Removed special case for `:before`, `:after`, `:first-letter` and `:first-line` to represent them as `PseudoElement`, now those pseudos are represented as `PseudoClass` nodes
- Removed deprecated `Syntax#match()` method
- Parser was splitted into modules and related changes, one step closer to an extensible parser
- Various fixes and improvements, all changes have negligible impact on performance
## 1.0.0-alpha13 (January 19, 2017)
- Changed location storing in `SyntaxMatchError`
- Changed property to store mismatch offset to `mismatchOffset`
- Changed `offset` property to store bad node offset in source CSS if any
- Added `loc` property that stores bad node `loc` if any
## 1.0.0-alpha12 (January 19, 2017)
- Fixed `Syntax#matchProperty()` method to always return a positive result for custom properties since syntax is never defined for them (#31)
- Implemented `fromPlainObject()` and `toPlainObject()` to convert plain object to AST or AST to plain object (currently converts `List` <-> `Array`)
## 1.0.0-alpha11 (January 18, 2017)
- Added support for `:matches(<selector-list>)` (#28)
- Added support for `:has(<relative-selector-list>)`
- Added support for `::slotted(<compound-selector>)`
- Implemented `Brackets` node type
- Implemented basic support for at-rule inside rule block (#24)
- Renamed `Selector` node type to `SelectorList`
- Renamed `SimpleSelector` node type to `Selector`
- Renamed `UnicodeRange.name` property to `UnicodeRange.value`
- Replaced `Negation` node type for regular `PseudoClass`
- Unified name of node property to store nested nodes, it always `children` now:
- `StyleSheet.rules` -> `StyleSheet.children`
- `SelectorList.selectors` -> `SelectorList.children`
- `Block.declarations` -> `Block.children`
- `*.sequence` -> `*.children`
- Fixed edge cases in parsing `Hex` and `UnicodeRange` when number not an integer
- Changed `nth-` pseudos parsing
- Implemented `An+B` node type to represent expressions like `2n + 1` or `-3n`
- Fixed edge cases when `a` or `b` is not an integer
- Changed `odd` and `even` keywords processing, keywords are storing as `Identifier` node type now
- Changed `Nth` node type format to store a `nth`-query and an optional `selector`
- Implemented `of` clause for `nth-` pseudos (a.e. `:nth-child(2n + 1 of li, img)`)
- Limited `Nth` parsing rules to `:nth-child()`, `:nth-last-child()`, `:nth-of-type()` and `:nth-last-of-type()` pseudos
- Changed the way to store locations
- Renamed `info` node property to `loc`
- Changed format of `loc` to store `start` and `end` positions
## 1.0.0-alpha10 (January 11, 2017)
- Reworked `Scanner` to be a single point to its functionality
- Exposed `Scanner` class to be useful for external projects
- Changed `walk()` function behaviour to traverse AST nodes in natural order
- Implemented `walkUp()` function to traverse AST nodes from deepest to parent (behaves as `walk()` before)
## 1.0.0-alpha9 (December 21, 2016)
- Fixed `<angle>` generic according to specs that allow a `<number>` equals to zero to be used as valid value (#30)
## 1.0.0-alpha8 (November 11, 2016)
- Fixed `Scanner#skip()` issue method when cursor is moving to the end of source
- Simplified `Progid` node
- Changed behaviour for bad selector processing, now parsing fails instead of selector ignoring
- Fixed `<id-selector>` generic syntax
- Added `q` unit for `<length>` generic syntax
- Refactored syntax parser (performance)
- Reduced startup time by implementing lazy syntax parsing (default syntax doesn't parse on module load)
- Updated syntax dictionaries and used [`mdn/data`](https://github.com/mdn/data) instead of `Template:CSSData`
- Renamed `syntax.stringify()` method to `syntax.translate()`
- Simplified generic syntax functions, those functions receive a single AST node for checking and should return `true` or `false`
- Added exception for values that contains `var()`, those values are always valid for now
- Added more tests and increase code coverage to `98.5%`
## 1.0.0-alpha7 (October 7, 2016)
- Added support for explicit descendant combinator (`>>`)
- Implemented `Type` and `Universal` type nodes
- Improved `Number` parsing by including sign and exponent (#26)
- Parse `before`, `after`, `first-letter` and `first-line` pseudos with single colon as `PseudoElement`
- Changed `FunctionalPseudo` node type to `PseudoClass`
- Fixed attribute selector name parsing (namespace edge cases)
- Fixed location calculation for specified offset when `eof` is reached
- Added more non-standard colors (#25)
- Removed obsolete `Syntax#getAll()` method
- Fixed various edge cases, code clean up and performance improvements
## 1.0.0-alpha6 (September 23, 2016)
- More accurate positions for syntax mismatch errors
- Added [`apple`](https://webkit.org/blog/3709/using-the-system-font-in-web-content/) specific font keywords (#20)
- Changed `Property` node stucture from object to string
- Renamed `Ruleset` node type to `Rule`
- Removed `Argument` node type
- Fixed `Dimension` and `Percentage` position computation
- Fixed bad selector parsing (temporary solution)
- Fixed location computation for CSS with very long lines that may lead to really long parsing with `positions:true` (even freeze)
- Fixed `line` and `column` computation for `SyntaxMatch` error
- Improved performance of parsing and translation. Now CSSTree is under 10ms in [PostCSS benchmark](https://github.com/postcss/benchmark).

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Copyright (C) 2016-2019 by Roman Dvornov
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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<img align="right" width="111" height="111"
alt="CSSTree logo"
src="https://cloud.githubusercontent.com/assets/270491/19243723/6f9136c6-8f21-11e6-82ac-eeeee4c6c452.png"/>
# CSSTree
[![NPM version](https://img.shields.io/npm/v/css-tree.svg)](https://www.npmjs.com/package/css-tree)
[![Build Status](https://travis-ci.org/csstree/csstree.svg?branch=master)](https://travis-ci.org/csstree/csstree)
[![Coverage Status](https://coveralls.io/repos/github/csstree/csstree/badge.svg?branch=master)](https://coveralls.io/github/csstree/csstree?branch=master)
[![NPM Downloads](https://img.shields.io/npm/dm/css-tree.svg)](https://www.npmjs.com/package/css-tree)
[![Twitter](https://img.shields.io/badge/Twitter-@csstree-blue.svg)](https://twitter.com/csstree)
CSSTree is a tool set for CSS: [fast](https://github.com/postcss/benchmark) detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations. The main goal is to be efficient and W3C specs compliant, with focus on CSS analyzing and source-to-source transforming tasks.
> NOTE: The library isn't in final shape and needs further improvements (e.g. AST format and API are subjects to change in next major versions). However it's stable enough and used by projects like [CSSO](https://github.com/css/csso) (CSS minifier) and [SVGO](https://github.com/svg/svgo) (SVG optimizer) in production.
## Features
- **Detailed parsing with an adjustable level of detail**
By default CSSTree parses CSS as detailed as possible, i.e. each single logical part is representing with its own AST node (see [AST format](docs/ast.md) for all possible node types). The parsing detail level can be changed through [parser options](docs/parsing.md#parsesource-options), for example, you can disable parsing of selectors or declaration values for component parts.
- **Tolerant to errors by design**
Parser behaves as [spec says](https://www.w3.org/TR/css-syntax-3/#error-handling): "When errors occur in CSS, the parser attempts to recover gracefully, throwing away only the minimum amount of content before returning to parsing as normal". The only thing the parser departs from the specification is that it doesn't throw away bad content, but wraps it in a special node type (`Raw`) that allows processing it later.
- **Fast and efficient**
CSSTree is created with focus on performance and effective memory consumption. Therefore it's [one of the fastest CSS parsers](https://github.com/postcss/benchmark) at the moment.
- **Syntax validation**
The build-in lexer can test CSS against syntaxes defined by W3C. CSSTree uses [mdn/data](https://github.com/mdn/data/) as a basis for lexer's dictionaries and extends it with vendor specific and legacy syntaxes. Lexer can only check the declaration values currently, but this feature will be extended to other parts of the CSS in the future.
## Documentation
- [AST format](docs/ast.md)
- [Parsing CSS → AST](docs/parsing.md)
- [parse(source[, options])](docs/parsing.md#parsesource-options)
- [Serialization AST → CSS](docs/generate.md)
- [generate(ast[, options])](docs/generate.md#generateast-options)
- [AST traversal](docs/traversal.md)
- [walk(ast, options)](docs/traversal.md#walkast-options)
- [find(ast, fn)](docs/traversal.md#findast-fn)
- [findLast(ast, fn)](docs/traversal.md#findlastast-fn)
- [findAll(ast, fn)](docs/traversal.md#findallast-fn)
- [Utils for AST](docs/utils.md)
- [property(name)](docs/utils.md#propertyname)
- [keyword(name)](docs/utils.md#keywordname)
- [clone(ast)](docs/utils.md#cloneast)
- [fromPlainObject(object)](docs/utils.md#fromplainobjectobject)
- [toPlainObject(ast)](docs/utils.md#toplainobjectast)
- [Value Definition Syntax](docs/definition-syntax.md)
- [parse(source)](docs/definition-syntax.md#parsesource)
- [walk(node, options, context)](docs/definition-syntax.md#walknode-options-context)
- [generate(node, options)](docs/definition-syntax.md#generatenode-options)
- [AST format](docs/definition-syntax.md#ast-format)
## Tools
* [AST Explorer](https://astexplorer.net/#/gist/244e2fb4da940df52bf0f4b94277db44/e79aff44611020b22cfd9708f3a99ce09b7d67a8) – explore CSSTree AST format with zero setup
* [CSS syntax reference](https://csstree.github.io/docs/syntax.html)
* [CSS syntax validator](https://csstree.github.io/docs/validator.html)
## Related projects
* [csstree-validator](https://github.com/csstree/validator) – NPM package to validate CSS
* [stylelint-csstree-validator](https://github.com/csstree/stylelint-validator) – plugin for stylelint to validate CSS
* [Grunt plugin](https://github.com/sergejmueller/grunt-csstree-validator)
* [Gulp plugin](https://github.com/csstree/gulp-csstree)
* [Sublime plugin](https://github.com/csstree/SublimeLinter-contrib-csstree)
* [VS Code plugin](https://github.com/csstree/vscode-plugin)
* [Atom plugin](https://github.com/csstree/atom-plugin)
## Usage
Install with npm:
```
> npm install css-tree
```
Basic usage:
```js
var csstree = require('css-tree');
// parse CSS to AST
var ast = csstree.parse('.example { world: "!" }');
// traverse AST and modify it
csstree.walk(ast, function(node) {
if (node.type === 'ClassSelector' && node.name === 'example') {
node.name = 'hello';
}
});
// generate CSS from AST
console.log(csstree.generate(ast));
// .hello{world:"!"}
```
Syntax matching:
```js
// parse CSS to AST as a declaration value
var ast = csstree.parse('red 1px solid', { context: 'value' });
// match to syntax of `border` property
var matchResult = csstree.lexer.matchProperty('border', ast);
// check first value node is a <color>
console.log(matchResult.isType(ast.children.first(), 'color'));
// true
// get a type list matched to a node
console.log(matchResult.getTrace(ast.children.first()));
// [ { type: 'Property', name: 'border' },
// { type: 'Type', name: 'color' },
// { type: 'Type', name: 'named-color' },
// { type: 'Keyword', name: 'red' } ]
```
## Top level API
![API map](https://cdn.rawgit.com/csstree/csstree/1.0/docs/api-map.svg)
## License
MIT

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const mdnAtrules = require('mdn-data/css/at-rules.json');
const mdnProperties = require('mdn-data/css/properties.json');
const mdnSyntaxes = require('mdn-data/css/syntaxes.json');
const patch = require('./patch.json');
const extendSyntax = /^\s*\|\s*/;
function preprocessAtrules(dict) {
const result = Object.create(null);
for (const atruleName in dict) {
const atrule = dict[atruleName];
let descriptors = null;
if (atrule.descriptors) {
descriptors = Object.create(null);
for (const descriptor in atrule.descriptors) {
descriptors[descriptor] = atrule.descriptors[descriptor].syntax;
}
}
result[atruleName.substr(1)] = {
prelude: atrule.syntax.trim().match(/^@\S+\s+([^;\{]*)/)[1].trim() || null,
descriptors
};
}
return result;
}
function patchDictionary(dict, patchDict) {
const result = {};
// copy all syntaxes for an original dict
for (const key in dict) {
result[key] = dict[key].syntax || dict[key];
}
// apply a patch
for (const key in patchDict) {
if (key in dict) {
if (patchDict[key].syntax) {
result[key] = extendSyntax.test(patchDict[key].syntax)
? result[key] + ' ' + patchDict[key].syntax.trim()
: patchDict[key].syntax;
} else {
delete result[key];
}
} else {
if (patchDict[key].syntax) {
result[key] = patchDict[key].syntax.replace(extendSyntax, '');
}
}
}
return result;
}
function unpackSyntaxes(dict) {
const result = {};
for (const key in dict) {
result[key] = dict[key].syntax;
}
return result;
}
function patchAtrules(dict, patchDict) {
const result = {};
// copy all syntaxes for an original dict
for (const key in dict) {
const patchDescriptors = (patchDict[key] && patchDict[key].descriptors) || null;
result[key] = {
prelude: key in patchDict && 'prelude' in patchDict[key]
? patchDict[key].prelude
: dict[key].prelude || null,
descriptors: dict[key].descriptors
? patchDictionary(dict[key].descriptors, patchDescriptors || {})
: patchDescriptors && unpackSyntaxes(patchDescriptors)
};
}
// apply a patch
for (const key in patchDict) {
if (!hasOwnProperty.call(dict, key)) {
result[key] = {
prelude: patchDict[key].prelude || null,
descriptors: patchDict[key].descriptors && unpackSyntaxes(patchDict[key].descriptors)
};
}
}
return result;
}
module.exports = {
types: patchDictionary(mdnSyntaxes, patch.syntaxes),
atrules: patchAtrules(preprocessAtrules(mdnAtrules), patch.atrules),
properties: patchDictionary(mdnProperties, patch.properties)
};

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{
"atrules": {
"charset": {
"prelude": "<string>"
},
"font-face": {
"descriptors": {
"unicode-range": {
"comment": "replaces <unicode-range>, an old production name",
"syntax": "<urange>#"
}
}
}
},
"properties": {
"-moz-background-clip": {
"comment": "deprecated syntax in old Firefox, https://developer.mozilla.org/en/docs/Web/CSS/background-clip",
"syntax": "padding | border"
},
"-moz-border-radius-bottomleft": {
"comment": "https://developer.mozilla.org/en-US/docs/Web/CSS/border-bottom-left-radius",
"syntax": "<'border-bottom-left-radius'>"
},
"-moz-border-radius-bottomright": {
"comment": "https://developer.mozilla.org/en-US/docs/Web/CSS/border-bottom-right-radius",
"syntax": "<'border-bottom-right-radius'>"
},
"-moz-border-radius-topleft": {
"comment": "https://developer.mozilla.org/en-US/docs/Web/CSS/border-top-left-radius",
"syntax": "<'border-top-left-radius'>"
},
"-moz-border-radius-topright": {
"comment": "https://developer.mozilla.org/en-US/docs/Web/CSS/border-bottom-right-radius",
"syntax": "<'border-bottom-right-radius'>"
},
"-moz-control-character-visibility": {
"comment": "firefox specific keywords, https://bugzilla.mozilla.org/show_bug.cgi?id=947588",
"syntax": "visible | hidden"
},
"-moz-osx-font-smoothing": {
"comment": "misssed old syntax https://developer.mozilla.org/en-US/docs/Web/CSS/font-smooth",
"syntax": "auto | grayscale"
},
"-moz-user-select": {
"comment": "https://developer.mozilla.org/en-US/docs/Web/CSS/user-select",
"syntax": "none | text | all | -moz-none"
},
"-ms-flex-align": {
"comment": "misssed old syntax implemented in IE, https://www.w3.org/TR/2012/WD-css3-flexbox-20120322/#flex-align",
"syntax": "start | end | center | baseline | stretch"
},
"-ms-flex-item-align": {
"comment": "misssed old syntax implemented in IE, https://www.w3.org/TR/2012/WD-css3-flexbox-20120322/#flex-align",
"syntax": "auto | start | end | center | baseline | stretch"
},
"-ms-flex-line-pack": {
"comment": "misssed old syntax implemented in IE, https://www.w3.org/TR/2012/WD-css3-flexbox-20120322/#flex-line-pack",
"syntax": "start | end | center | justify | distribute | stretch"
},
"-ms-flex-negative": {
"comment": "misssed old syntax implemented in IE; TODO: find references for comfirmation",
"syntax": "<'flex-shrink'>"
},
"-ms-flex-pack": {
"comment": "misssed old syntax implemented in IE, https://www.w3.org/TR/2012/WD-css3-flexbox-20120322/#flex-pack",
"syntax": "start | end | center | justify | distribute"
},
"-ms-flex-order": {
"comment": "misssed old syntax implemented in IE; https://msdn.microsoft.com/en-us/library/jj127303(v=vs.85).aspx",
"syntax": "<integer>"
},
"-ms-flex-positive": {
"comment": "misssed old syntax implemented in IE; TODO: find references for comfirmation",
"syntax": "<'flex-grow'>"
},
"-ms-flex-preferred-size": {
"comment": "misssed old syntax implemented in IE; TODO: find references for comfirmation",
"syntax": "<'flex-basis'>"
},
"-ms-interpolation-mode": {
"comment": "https://msdn.microsoft.com/en-us/library/ff521095(v=vs.85).aspx",
"syntax": "nearest-neighbor | bicubic"
},
"-ms-grid-column-align": {
"comment": "add this property first since it uses as fallback for flexbox, https://msdn.microsoft.com/en-us/library/windows/apps/hh466338.aspx",
"syntax": "start | end | center | stretch"
},
"-ms-grid-row-align": {
"comment": "add this property first since it uses as fallback for flexbox, https://msdn.microsoft.com/en-us/library/windows/apps/hh466348.aspx",
"syntax": "start | end | center | stretch"
},
"-ms-hyphenate-limit-last": {
"comment": "misssed old syntax implemented in IE; https://www.w3.org/TR/css-text-4/#hyphenate-line-limits",
"syntax": "none | always | column | page | spread"
},
"-webkit-appearance": {
"comment": "webkit specific keywords",
"references": [
"http://css-infos.net/property/-webkit-appearance"
],
"syntax": "none | button | button-bevel | caps-lock-indicator | caret | checkbox | default-button | inner-spin-button | listbox | listitem | media-controls-background | media-controls-fullscreen-background | media-current-time-display | media-enter-fullscreen-button | media-exit-fullscreen-button | media-fullscreen-button | media-mute-button | media-overlay-play-button | media-play-button | media-seek-back-button | media-seek-forward-button | media-slider | media-sliderthumb | media-time-remaining-display | media-toggle-closed-captions-button | media-volume-slider | media-volume-slider-container | media-volume-sliderthumb | menulist | menulist-button | menulist-text | menulist-textfield | meter | progress-bar | progress-bar-value | push-button | radio | scrollbarbutton-down | scrollbarbutton-left | scrollbarbutton-right | scrollbarbutton-up | scrollbargripper-horizontal | scrollbargripper-vertical | scrollbarthumb-horizontal | scrollbarthumb-vertical | scrollbartrack-horizontal | scrollbartrack-vertical | searchfield | searchfield-cancel-button | searchfield-decoration | searchfield-results-button | searchfield-results-decoration | slider-horizontal | slider-vertical | sliderthumb-horizontal | sliderthumb-vertical | square-button | textarea | textfield | -apple-pay-button"
},
"-webkit-background-clip": {
"comment": "https://developer.mozilla.org/en/docs/Web/CSS/background-clip",
"syntax": "[ <box> | border | padding | content | text ]#"
},
"-webkit-column-break-after": {
"comment": "added, http://help.dottoro.com/lcrthhhv.php",
"syntax": "always | auto | avoid"
},
"-webkit-column-break-before": {
"comment": "added, http://help.dottoro.com/lcxquvkf.php",
"syntax": "always | auto | avoid"
},
"-webkit-column-break-inside": {
"comment": "added, http://help.dottoro.com/lclhnthl.php",
"syntax": "always | auto | avoid"
},
"-webkit-font-smoothing": {
"comment": "https://developer.mozilla.org/en-US/docs/Web/CSS/font-smooth",
"syntax": "auto | none | antialiased | subpixel-antialiased"
},
"-webkit-mask-box-image": {
"comment": "missed; https://developer.mozilla.org/en-US/docs/Web/CSS/-webkit-mask-box-image",
"syntax": "[ <url> | <gradient> | none ] [ <length-percentage>{4} <-webkit-mask-box-repeat>{2} ]?"
},
"-webkit-print-color-adjust": {
"comment": "missed",
"references": [
"https://developer.mozilla.org/en/docs/Web/CSS/-webkit-print-color-adjust"
],
"syntax": "economy | exact"
},
"-webkit-text-security": {
"comment": "missed; http://help.dottoro.com/lcbkewgt.php",
"syntax": "none | circle | disc | square"
},
"-webkit-user-drag": {
"comment": "missed; http://help.dottoro.com/lcbixvwm.php",
"syntax": "none | element | auto"
},
"-webkit-user-select": {
"comment": "auto is supported by old webkit, https://developer.mozilla.org/en-US/docs/Web/CSS/user-select",
"syntax": "auto | none | text | all"
},
"alignment-baseline": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/text.html#AlignmentBaselineProperty"
],
"syntax": "auto | baseline | before-edge | text-before-edge | middle | central | after-edge | text-after-edge | ideographic | alphabetic | hanging | mathematical"
},
"baseline-shift": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/text.html#BaselineShiftProperty"
],
"syntax": "baseline | sub | super | <svg-length>"
},
"behavior": {
"comment": "added old IE property https://msdn.microsoft.com/en-us/library/ms530723(v=vs.85).aspx",
"syntax": "<url>+"
},
"clip-rule": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/masking.html#ClipRuleProperty"
],
"syntax": "nonzero | evenodd"
},
"cue": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "<'cue-before'> <'cue-after'>?"
},
"cue-after": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "<url> <decibel>? | none"
},
"cue-before": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "<url> <decibel>? | none"
},
"cursor": {
"comment": "added legacy keywords: hand, -webkit-grab. -webkit-grabbing, -webkit-zoom-in, -webkit-zoom-out, -moz-grab, -moz-grabbing, -moz-zoom-in, -moz-zoom-out",
"references": [
"https://www.sitepoint.com/css3-cursor-styles/"
],
"syntax": "[ [ <url> [ <x> <y> ]? , ]* [ auto | default | none | context-menu | help | pointer | progress | wait | cell | crosshair | text | vertical-text | alias | copy | move | no-drop | not-allowed | e-resize | n-resize | ne-resize | nw-resize | s-resize | se-resize | sw-resize | w-resize | ew-resize | ns-resize | nesw-resize | nwse-resize | col-resize | row-resize | all-scroll | zoom-in | zoom-out | grab | grabbing | hand | -webkit-grab | -webkit-grabbing | -webkit-zoom-in | -webkit-zoom-out | -moz-grab | -moz-grabbing | -moz-zoom-in | -moz-zoom-out ] ]"
},
"display": {
"comment": "extended with -ms-flexbox",
"syntax": "| <-non-standard-display>"
},
"position": {
"comment": "extended with -webkit-sticky",
"syntax": "| -webkit-sticky"
},
"dominant-baseline": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/text.html#DominantBaselineProperty"
],
"syntax": "auto | use-script | no-change | reset-size | ideographic | alphabetic | hanging | mathematical | central | middle | text-after-edge | text-before-edge"
},
"image-rendering": {
"comment": "extended with <-non-standard-image-rendering>, added SVG keywords optimizeSpeed and optimizeQuality",
"references": [
"https://developer.mozilla.org/en/docs/Web/CSS/image-rendering",
"https://www.w3.org/TR/SVG/painting.html#ImageRenderingProperty"
],
"syntax": "| optimizeSpeed | optimizeQuality | <-non-standard-image-rendering>"
},
"fill": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#FillProperty"
],
"syntax": "<paint>"
},
"fill-opacity": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#FillProperty"
],
"syntax": "<number-zero-one>"
},
"fill-rule": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#FillProperty"
],
"syntax": "nonzero | evenodd"
},
"filter": {
"comment": "extend with IE legacy syntaxes",
"syntax": "| <-ms-filter-function-list>"
},
"glyph-orientation-horizontal": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/text.html#GlyphOrientationHorizontalProperty"
],
"syntax": "<angle>"
},
"glyph-orientation-vertical": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/text.html#GlyphOrientationVerticalProperty"
],
"syntax": "<angle>"
},
"kerning": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/text.html#KerningProperty"
],
"syntax": "auto | <svg-length>"
},
"letter-spacing": {
"comment": "fix syntax <length> -> <length-percentage>",
"references": [
"https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/letter-spacing"
],
"syntax": "normal | <length-percentage>"
},
"marker": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#MarkerProperties"
],
"syntax": "none | <url>"
},
"marker-end": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#MarkerProperties"
],
"syntax": "none | <url>"
},
"marker-mid": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#MarkerProperties"
],
"syntax": "none | <url>"
},
"marker-start": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#MarkerProperties"
],
"syntax": "none | <url>"
},
"max-width": {
"comment": "fix auto -> none (https://github.com/mdn/data/pull/431); extend by non-standard width keywords https://developer.mozilla.org/en-US/docs/Web/CSS/max-width",
"syntax": "none | <length-percentage> | min-content | max-content | fit-content(<length-percentage>) | <-non-standard-width>"
},
"min-width": {
"comment": "extend by non-standard width keywords https://developer.mozilla.org/en-US/docs/Web/CSS/width",
"syntax": "auto | <length-percentage> | min-content | max-content | fit-content(<length-percentage>) | <-non-standard-width>"
},
"overflow": {
"comment": "extend by vendor keywords https://developer.mozilla.org/en-US/docs/Web/CSS/overflow",
"syntax": "| <-non-standard-overflow>"
},
"pause": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "<'pause-before'> <'pause-after'>?"
},
"pause-after": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "<time> | none | x-weak | weak | medium | strong | x-strong"
},
"pause-before": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "<time> | none | x-weak | weak | medium | strong | x-strong"
},
"rest": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "<'rest-before'> <'rest-after'>?"
},
"rest-after": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "<time> | none | x-weak | weak | medium | strong | x-strong"
},
"rest-before": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "<time> | none | x-weak | weak | medium | strong | x-strong"
},
"shape-rendering": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#ShapeRenderingPropert"
],
"syntax": "auto | optimizeSpeed | crispEdges | geometricPrecision"
},
"src": {
"comment": "added @font-face's src property https://developer.mozilla.org/en-US/docs/Web/CSS/@font-face/src",
"syntax": "[ <url> [ format( <string># ) ]? | local( <family-name> ) ]#"
},
"speak": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "auto | none | normal"
},
"speak-as": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "normal | spell-out || digits || [ literal-punctuation | no-punctuation ]"
},
"stroke": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#StrokeProperties"
],
"syntax": "<paint>"
},
"stroke-dasharray": {
"comment": "added SVG property; a list of comma and/or white space separated <length>s and <percentage>s",
"references": [
"https://www.w3.org/TR/SVG/painting.html#StrokeProperties"
],
"syntax": "none | [ <svg-length>+ ]#"
},
"stroke-dashoffset": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#StrokeProperties"
],
"syntax": "<svg-length>"
},
"stroke-linecap": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#StrokeProperties"
],
"syntax": "butt | round | square"
},
"stroke-linejoin": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#StrokeProperties"
],
"syntax": "miter | round | bevel"
},
"stroke-miterlimit": {
"comment": "added SVG property (<miterlimit> = <number-one-or-greater>) ",
"references": [
"https://www.w3.org/TR/SVG/painting.html#StrokeProperties"
],
"syntax": "<number-one-or-greater>"
},
"stroke-opacity": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#StrokeProperties"
],
"syntax": "<number-zero-one>"
},
"stroke-width": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/painting.html#StrokeProperties"
],
"syntax": "<svg-length>"
},
"text-anchor": {
"comment": "added SVG property",
"references": [
"https://www.w3.org/TR/SVG/text.html#TextAlignmentProperties"
],
"syntax": "start | middle | end"
},
"unicode-bidi": {
"comment": "added prefixed keywords https://developer.mozilla.org/en-US/docs/Web/CSS/unicode-bidi",
"syntax": "| -moz-isolate | -moz-isolate-override | -moz-plaintext | -webkit-isolate | -webkit-isolate-override | -webkit-plaintext"
},
"unicode-range": {
"comment": "added missed property https://developer.mozilla.org/en-US/docs/Web/CSS/%40font-face/unicode-range",
"syntax": "<urange>#"
},
"voice-balance": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "<number> | left | center | right | leftwards | rightwards"
},
"voice-duration": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "auto | <time>"
},
"voice-family": {
"comment": "<name> -> <family-name>, https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "[ [ <family-name> | <generic-voice> ] , ]* [ <family-name> | <generic-voice> ] | preserve"
},
"voice-pitch": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "<frequency> && absolute | [ [ x-low | low | medium | high | x-high ] || [ <frequency> | <semitones> | <percentage> ] ]"
},
"voice-range": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "<frequency> && absolute | [ [ x-low | low | medium | high | x-high ] || [ <frequency> | <semitones> | <percentage> ] ]"
},
"voice-rate": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "[ normal | x-slow | slow | medium | fast | x-fast ] || <percentage>"
},
"voice-stress": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "normal | strong | moderate | none | reduced"
},
"voice-volume": {
"comment": "https://www.w3.org/TR/css3-speech/#property-index",
"syntax": "silent | [ [ x-soft | soft | medium | loud | x-loud ] || <decibel> ]"
},
"writing-mode": {
"comment": "extend with SVG keywords",
"syntax": "| <svg-writing-mode>"
}
},
"syntaxes": {
"-legacy-gradient": {
"comment": "added collection of legacy gradient syntaxes",
"syntax": "<-webkit-gradient()> | <-legacy-linear-gradient> | <-legacy-repeating-linear-gradient> | <-legacy-radial-gradient> | <-legacy-repeating-radial-gradient>"
},
"-legacy-linear-gradient": {
"comment": "like standard syntax but w/o `to` keyword https://developer.mozilla.org/en-US/docs/Web/CSS/linear-gradient",
"syntax": "-moz-linear-gradient( <-legacy-linear-gradient-arguments> ) | -webkit-linear-gradient( <-legacy-linear-gradient-arguments> ) | -o-linear-gradient( <-legacy-linear-gradient-arguments> )"
},
"-legacy-repeating-linear-gradient": {
"comment": "like standard syntax but w/o `to` keyword https://developer.mozilla.org/en-US/docs/Web/CSS/linear-gradient",
"syntax": "-moz-repeating-linear-gradient( <-legacy-linear-gradient-arguments> ) | -webkit-repeating-linear-gradient( <-legacy-linear-gradient-arguments> ) | -o-repeating-linear-gradient( <-legacy-linear-gradient-arguments> )"
},
"-legacy-linear-gradient-arguments": {
"comment": "like standard syntax but w/o `to` keyword https://developer.mozilla.org/en-US/docs/Web/CSS/linear-gradient",
"syntax": "[ <angle> | <side-or-corner> ]? , <color-stop-list>"
},
"-legacy-radial-gradient": {
"comment": "deprecated syntax that implemented by some browsers https://www.w3.org/TR/2011/WD-css3-images-20110908/#radial-gradients",
"syntax": "-moz-radial-gradient( <-legacy-radial-gradient-arguments> ) | -webkit-radial-gradient( <-legacy-radial-gradient-arguments> ) | -o-radial-gradient( <-legacy-radial-gradient-arguments> )"
},
"-legacy-repeating-radial-gradient": {
"comment": "deprecated syntax that implemented by some browsers https://www.w3.org/TR/2011/WD-css3-images-20110908/#radial-gradients",
"syntax": "-moz-repeating-radial-gradient( <-legacy-radial-gradient-arguments> ) | -webkit-repeating-radial-gradient( <-legacy-radial-gradient-arguments> ) | -o-repeating-radial-gradient( <-legacy-radial-gradient-arguments> )"
},
"-legacy-radial-gradient-arguments": {
"comment": "deprecated syntax that implemented by some browsers https://www.w3.org/TR/2011/WD-css3-images-20110908/#radial-gradients",
"syntax": "[ <position> , ]? [ [ [ <-legacy-radial-gradient-shape> || <-legacy-radial-gradient-size> ] | [ <length> | <percentage> ]{2} ] , ]? <color-stop-list>"
},
"-legacy-radial-gradient-size": {
"comment": "before a standard it contains 2 extra keywords (`contain` and `cover`) https://www.w3.org/TR/2011/WD-css3-images-20110908/#ltsize",
"syntax": "closest-side | closest-corner | farthest-side | farthest-corner | contain | cover"
},
"-legacy-radial-gradient-shape": {
"comment": "define to double sure it doesn't extends in future https://www.w3.org/TR/2011/WD-css3-images-20110908/#ltshape",
"syntax": "circle | ellipse"
},
"-non-standard-font": {
"comment": "non standard fonts",
"references": [
"https://webkit.org/blog/3709/using-the-system-font-in-web-content/"
],
"syntax": "-apple-system-body | -apple-system-headline | -apple-system-subheadline | -apple-system-caption1 | -apple-system-caption2 | -apple-system-footnote | -apple-system-short-body | -apple-system-short-headline | -apple-system-short-subheadline | -apple-system-short-caption1 | -apple-system-short-footnote | -apple-system-tall-body"
},
"-non-standard-color": {
"comment": "non standard colors",
"references": [
"http://cssdot.ru/%D0%A1%D0%BF%D1%80%D0%B0%D0%B2%D0%BE%D1%87%D0%BD%D0%B8%D0%BA_CSS/color-i305.html",
"https://developer.mozilla.org/en-US/docs/Web/CSS/color_value#Mozilla_Color_Preference_Extensions"
],
"syntax": "-moz-ButtonDefault | -moz-ButtonHoverFace | -moz-ButtonHoverText | -moz-CellHighlight | -moz-CellHighlightText | -moz-Combobox | -moz-ComboboxText | -moz-Dialog | -moz-DialogText | -moz-dragtargetzone | -moz-EvenTreeRow | -moz-Field | -moz-FieldText | -moz-html-CellHighlight | -moz-html-CellHighlightText | -moz-mac-accentdarkestshadow | -moz-mac-accentdarkshadow | -moz-mac-accentface | -moz-mac-accentlightesthighlight | -moz-mac-accentlightshadow | -moz-mac-accentregularhighlight | -moz-mac-accentregularshadow | -moz-mac-chrome-active | -moz-mac-chrome-inactive | -moz-mac-focusring | -moz-mac-menuselect | -moz-mac-menushadow | -moz-mac-menutextselect | -moz-MenuHover | -moz-MenuHoverText | -moz-MenuBarText | -moz-MenuBarHoverText | -moz-nativehyperlinktext | -moz-OddTreeRow | -moz-win-communicationstext | -moz-win-mediatext | -moz-activehyperlinktext | -moz-default-background-color | -moz-default-color | -moz-hyperlinktext | -moz-visitedhyperlinktext | -webkit-activelink | -webkit-focus-ring-color | -webkit-link | -webkit-text"
},
"-non-standard-image-rendering": {
"comment": "non-standard keywords http://phrogz.net/tmp/canvas_image_zoom.html",
"syntax": "optimize-contrast | -moz-crisp-edges | -o-crisp-edges | -webkit-optimize-contrast"
},
"-non-standard-overflow": {
"comment": "non-standard keywords https://developer.mozilla.org/en-US/docs/Web/CSS/overflow",
"syntax": "-moz-scrollbars-none | -moz-scrollbars-horizontal | -moz-scrollbars-vertical | -moz-hidden-unscrollable"
},
"-non-standard-width": {
"comment": "non-standard keywords https://developer.mozilla.org/en-US/docs/Web/CSS/width",
"syntax": "fill-available | min-intrinsic | intrinsic | -moz-available | -moz-fit-content | -moz-min-content | -moz-max-content | -webkit-min-content | -webkit-max-content"
},
"-webkit-gradient()": {
"comment": "first Apple proposal gradient syntax https://webkit.org/blog/175/introducing-css-gradients/ - TODO: simplify when after match algorithm improvement ( [, point, radius | , point] -> [, radius]? , point )",
"syntax": "-webkit-gradient( <-webkit-gradient-type>, <-webkit-gradient-point> [, <-webkit-gradient-point> | , <-webkit-gradient-radius>, <-webkit-gradient-point> ] [, <-webkit-gradient-radius>]? [, <-webkit-gradient-color-stop>]* )"
},
"-webkit-gradient-color-stop": {
"comment": "first Apple proposal gradient syntax https://webkit.org/blog/175/introducing-css-gradients/",
"syntax": "from( <color> ) | color-stop( [ <number-zero-one> | <percentage> ] , <color> ) | to( <color> )"
},
"-webkit-gradient-point": {
"comment": "first Apple proposal gradient syntax https://webkit.org/blog/175/introducing-css-gradients/",
"syntax": "[ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ]"
},
"-webkit-gradient-radius": {
"comment": "first Apple proposal gradient syntax https://webkit.org/blog/175/introducing-css-gradients/",
"syntax": "<length> | <percentage>"
},
"-webkit-gradient-type": {
"comment": "first Apple proposal gradient syntax https://webkit.org/blog/175/introducing-css-gradients/",
"syntax": "linear | radial"
},
"-webkit-mask-box-repeat": {
"comment": "missed; https://developer.mozilla.org/en-US/docs/Web/CSS/-webkit-mask-box-image",
"syntax": "repeat | stretch | round"
},
"-webkit-mask-clip-style": {
"comment": "missed; there is no enough information about `-webkit-mask-clip` property, but looks like all those keywords are working",
"syntax": "border | border-box | padding | padding-box | content | content-box | text"
},
"-ms-filter-function-list": {
"comment": "https://developer.mozilla.org/en-US/docs/Web/CSS/-ms-filter",
"syntax": "<-ms-filter-function>+"
},
"-ms-filter-function": {
"comment": "https://developer.mozilla.org/en-US/docs/Web/CSS/-ms-filter",
"syntax": "<-ms-filter-function-progid> | <-ms-filter-function-legacy>"
},
"-ms-filter-function-progid": {
"comment": "https://developer.mozilla.org/en-US/docs/Web/CSS/-ms-filter",
"syntax": "'progid:' [ <ident-token> '.' ]* [ <ident-token> | <function-token> <any-value>? ) ]"
},
"-ms-filter-function-legacy": {
"comment": "https://developer.mozilla.org/en-US/docs/Web/CSS/-ms-filter",
"syntax": "<ident-token> | <function-token> <any-value>? )"
},
"-ms-filter": {
"syntax": "<string>"
},
"age": {
"comment": "https://www.w3.org/TR/css3-speech/#voice-family",
"syntax": "child | young | old"
},
"attr-name": {
"syntax": "<wq-name>"
},
"attr-fallback": {
"syntax": "<any-value>"
},
"border-radius": {
"comment": "missed, https://drafts.csswg.org/css-backgrounds-3/#the-border-radius",
"syntax": "<length-percentage>{1,2}"
},
"bottom": {
"comment": "missed; not sure we should add it, but no others except `shape` is using it so it's ok for now; https://drafts.fxtf.org/css-masking-1/#funcdef-clip-rect",
"syntax": "<length> | auto"
},
"content-list": {
"comment": "missed -> https://drafts.csswg.org/css-content/#typedef-content-list (document-url, <target> and leader() is omitted util stabilization)",
"syntax": "[ <string> | contents | <image> | <quote> | <target> | <leader()> | <attr()> | counter( <ident>, <'list-style-type'>? ) ]+"
},
"element()": {
"comment": "https://drafts.csswg.org/css-gcpm/#element-syntax & https://drafts.csswg.org/css-images-4/#element-notation",
"syntax": "element( <custom-ident> , [ first | start | last | first-except ]? ) | element( <id-selector> )"
},
"generic-voice": {
"comment": "https://www.w3.org/TR/css3-speech/#voice-family",
"syntax": "[ <age>? <gender> <integer>? ]"
},
"gender": {
"comment": "https://www.w3.org/TR/css3-speech/#voice-family",
"syntax": "male | female | neutral"
},
"generic-family": {
"comment": "added -apple-system",
"references": [
"https://webkit.org/blog/3709/using-the-system-font-in-web-content/"
],
"syntax": "| -apple-system"
},
"gradient": {
"comment": "added legacy syntaxes support",
"syntax": "| <-legacy-gradient>"
},
"left": {
"comment": "missed; not sure we should add it, but no others except `shape` is using it so it's ok for now; https://drafts.fxtf.org/css-masking-1/#funcdef-clip-rect",
"syntax": "<length> | auto"
},
"mask-image": {
"comment": "missed; https://drafts.fxtf.org/css-masking-1/#the-mask-image",
"syntax": "<mask-reference>#"
},
"name-repeat": {
"comment": "missed, and looks like obsolete, keep it as is since other property syntaxes should be changed too; https://www.w3.org/TR/2015/WD-css-grid-1-20150917/#typedef-name-repeat",
"syntax": "repeat( [ <positive-integer> | auto-fill ], <line-names>+)"
},
"named-color": {
"comment": "added non standard color names",
"syntax": "| <-non-standard-color>"
},
"paint": {
"comment": "used by SVG https://www.w3.org/TR/SVG/painting.html#SpecifyingPaint",
"syntax": "none | <color> | <url> [ none | <color> ]? | context-fill | context-stroke"
},
"page-size": {
"comment": "https://www.w3.org/TR/css-page-3/#typedef-page-size-page-size",
"syntax": "A5 | A4 | A3 | B5 | B4 | JIS-B5 | JIS-B4 | letter | legal | ledger"
},
"ratio": {
"comment": "missed, https://drafts.csswg.org/mediaqueries-4/#typedef-ratio",
"syntax": "<integer> / <integer>"
},
"right": {
"comment": "missed; not sure we should add it, but no others except `shape` is using it so it's ok for now; https://drafts.fxtf.org/css-masking-1/#funcdef-clip-rect",
"syntax": "<length> | auto"
},
"shape": {
"comment": "missed spaces in function body and add backwards compatible syntax",
"syntax": "rect( <top>, <right>, <bottom>, <left> ) | rect( <top> <right> <bottom> <left> )"
},
"svg-length": {
"comment": "All coordinates and lengths in SVG can be specified with or without a unit identifier",
"references": [
"https://www.w3.org/TR/SVG11/coords.html#Units"
],
"syntax": "<percentage> | <length> | <number>"
},
"svg-writing-mode": {
"comment": "SVG specific keywords (deprecated for CSS)",
"references": [
"https://developer.mozilla.org/en/docs/Web/CSS/writing-mode",
"https://www.w3.org/TR/SVG/text.html#WritingModeProperty"
],
"syntax": "lr-tb | rl-tb | tb-rl | lr | rl | tb"
},
"top": {
"comment": "missed; not sure we should add it, but no others except `shape` is using it so it's ok for now; https://drafts.fxtf.org/css-masking-1/#funcdef-clip-rect",
"syntax": "<length> | auto"
},
"track-group": {
"comment": "used by old grid-columns and grid-rows syntax v0",
"syntax": "'(' [ <string>* <track-minmax> <string>* ]+ ')' [ '[' <positive-integer> ']' ]? | <track-minmax>"
},
"track-list-v0": {
"comment": "used by old grid-columns and grid-rows syntax v0",
"syntax": "[ <string>* <track-group> <string>* ]+ | none"
},
"track-minmax": {
"comment": "used by old grid-columns and grid-rows syntax v0",
"syntax": "minmax( <track-breadth> , <track-breadth> ) | auto | <track-breadth> | fit-content"
},
"x": {
"comment": "missed; not sure we should add it, but no others except `cursor` is using it so it's ok for now; https://drafts.csswg.org/css-ui-3/#cursor",
"syntax": "<number>"
},
"y": {
"comment": "missed; not sure we should add it, but no others except `cursor` is using so it's ok for now; https://drafts.csswg.org/css-ui-3/#cursor",
"syntax": "<number>"
},
"declaration": {
"comment": "missed, restored by https://drafts.csswg.org/css-syntax",
"syntax": "<ident-token> : <declaration-value>? [ '!' important ]?"
},
"declaration-list": {
"comment": "missed, restored by https://drafts.csswg.org/css-syntax",
"syntax": "[ <declaration>? ';' ]* <declaration>?"
},
"url": {
"comment": "https://drafts.csswg.org/css-values-4/#urls",
"syntax": "url( <string> <url-modifier>* ) | <url-token>"
},
"url-modifier": {
"comment": "https://drafts.csswg.org/css-values-4/#typedef-url-modifier",
"syntax": "<ident> | <function-token> <any-value> )"
},
"number-zero-one": {
"syntax": "<number [0,1]>"
},
"number-one-or-greater": {
"syntax": "<number [1,∞]>"
},
"positive-integer": {
"syntax": "<integer [0,∞]>"
},
"-non-standard-display": {
"syntax": "-ms-inline-flexbox | -ms-grid | -ms-inline-grid | -webkit-flex | -webkit-inline-flex | -webkit-box | -webkit-inline-box | -moz-inline-stack | -moz-box | -moz-inline-box"
}
}
}

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assets_old/node_modules/csso/node_modules/css-tree/lib/common/List.js generated vendored Normal file
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//
// list
// ┌──────┐
// ┌──────────────┼─head │
// │ │ tail─┼──────────────┐
// │ └──────┘ │
// ▼ ▼
// item item item item
// ┌──────┐ ┌──────┐ ┌──────┐ ┌──────┐
// null ◀──┼─prev │◀───┼─prev │◀───┼─prev │◀───┼─prev │
// │ next─┼───▶│ next─┼───▶│ next─┼───▶│ next─┼──▶ null
// ├──────┤ ├──────┤ ├──────┤ ├──────┤
// │ data │ │ data │ │ data │ │ data │
// └──────┘ └──────┘ └──────┘ └──────┘
//
function createItem(data) {
return {
prev: null,
next: null,
data: data
};
}
function allocateCursor(node, prev, next) {
var cursor;
if (cursors !== null) {
cursor = cursors;
cursors = cursors.cursor;
cursor.prev = prev;
cursor.next = next;
cursor.cursor = node.cursor;
} else {
cursor = {
prev: prev,
next: next,
cursor: node.cursor
};
}
node.cursor = cursor;
return cursor;
}
function releaseCursor(node) {
var cursor = node.cursor;
node.cursor = cursor.cursor;
cursor.prev = null;
cursor.next = null;
cursor.cursor = cursors;
cursors = cursor;
}
var cursors = null;
var List = function() {
this.cursor = null;
this.head = null;
this.tail = null;
};
List.createItem = createItem;
List.prototype.createItem = createItem;
List.prototype.updateCursors = function(prevOld, prevNew, nextOld, nextNew) {
var cursor = this.cursor;
while (cursor !== null) {
if (cursor.prev === prevOld) {
cursor.prev = prevNew;
}
if (cursor.next === nextOld) {
cursor.next = nextNew;
}
cursor = cursor.cursor;
}
};
List.prototype.getSize = function() {
var size = 0;
var cursor = this.head;
while (cursor) {
size++;
cursor = cursor.next;
}
return size;
};
List.prototype.fromArray = function(array) {
var cursor = null;
this.head = null;
for (var i = 0; i < array.length; i++) {
var item = createItem(array[i]);
if (cursor !== null) {
cursor.next = item;
} else {
this.head = item;
}
item.prev = cursor;
cursor = item;
}
this.tail = cursor;
return this;
};
List.prototype.toArray = function() {
var cursor = this.head;
var result = [];
while (cursor) {
result.push(cursor.data);
cursor = cursor.next;
}
return result;
};
List.prototype.toJSON = List.prototype.toArray;
List.prototype.isEmpty = function() {
return this.head === null;
};
List.prototype.first = function() {
return this.head && this.head.data;
};
List.prototype.last = function() {
return this.tail && this.tail.data;
};
List.prototype.each = function(fn, context) {
var item;
if (context === undefined) {
context = this;
}
// push cursor
var cursor = allocateCursor(this, null, this.head);
while (cursor.next !== null) {
item = cursor.next;
cursor.next = item.next;
fn.call(context, item.data, item, this);
}
// pop cursor
releaseCursor(this);
};
List.prototype.forEach = List.prototype.each;
List.prototype.eachRight = function(fn, context) {
var item;
if (context === undefined) {
context = this;
}
// push cursor
var cursor = allocateCursor(this, this.tail, null);
while (cursor.prev !== null) {
item = cursor.prev;
cursor.prev = item.prev;
fn.call(context, item.data, item, this);
}
// pop cursor
releaseCursor(this);
};
List.prototype.forEachRight = List.prototype.eachRight;
List.prototype.reduce = function(fn, initialValue, context) {
var item;
if (context === undefined) {
context = this;
}
// push cursor
var cursor = allocateCursor(this, null, this.head);
var acc = initialValue;
while (cursor.next !== null) {
item = cursor.next;
cursor.next = item.next;
acc = fn.call(context, acc, item.data, item, this);
}
// pop cursor
releaseCursor(this);
return acc;
};
List.prototype.reduceRight = function(fn, initialValue, context) {
var item;
if (context === undefined) {
context = this;
}
// push cursor
var cursor = allocateCursor(this, this.tail, null);
var acc = initialValue;
while (cursor.prev !== null) {
item = cursor.prev;
cursor.prev = item.prev;
acc = fn.call(context, acc, item.data, item, this);
}
// pop cursor
releaseCursor(this);
return acc;
};
List.prototype.nextUntil = function(start, fn, context) {
if (start === null) {
return;
}
var item;
if (context === undefined) {
context = this;
}
// push cursor
var cursor = allocateCursor(this, null, start);
while (cursor.next !== null) {
item = cursor.next;
cursor.next = item.next;
if (fn.call(context, item.data, item, this)) {
break;
}
}
// pop cursor
releaseCursor(this);
};
List.prototype.prevUntil = function(start, fn, context) {
if (start === null) {
return;
}
var item;
if (context === undefined) {
context = this;
}
// push cursor
var cursor = allocateCursor(this, start, null);
while (cursor.prev !== null) {
item = cursor.prev;
cursor.prev = item.prev;
if (fn.call(context, item.data, item, this)) {
break;
}
}
// pop cursor
releaseCursor(this);
};
List.prototype.some = function(fn, context) {
var cursor = this.head;
if (context === undefined) {
context = this;
}
while (cursor !== null) {
if (fn.call(context, cursor.data, cursor, this)) {
return true;
}
cursor = cursor.next;
}
return false;
};
List.prototype.map = function(fn, context) {
var result = new List();
var cursor = this.head;
if (context === undefined) {
context = this;
}
while (cursor !== null) {
result.appendData(fn.call(context, cursor.data, cursor, this));
cursor = cursor.next;
}
return result;
};
List.prototype.filter = function(fn, context) {
var result = new List();
var cursor = this.head;
if (context === undefined) {
context = this;
}
while (cursor !== null) {
if (fn.call(context, cursor.data, cursor, this)) {
result.appendData(cursor.data);
}
cursor = cursor.next;
}
return result;
};
List.prototype.clear = function() {
this.head = null;
this.tail = null;
};
List.prototype.copy = function() {
var result = new List();
var cursor = this.head;
while (cursor !== null) {
result.insert(createItem(cursor.data));
cursor = cursor.next;
}
return result;
};
List.prototype.prepend = function(item) {
// head
// ^
// item
this.updateCursors(null, item, this.head, item);
// insert to the beginning of the list
if (this.head !== null) {
// new item <- first item
this.head.prev = item;
// new item -> first item
item.next = this.head;
} else {
// if list has no head, then it also has no tail
// in this case tail points to the new item
this.tail = item;
}
// head always points to new item
this.head = item;
return this;
};
List.prototype.prependData = function(data) {
return this.prepend(createItem(data));
};
List.prototype.append = function(item) {
return this.insert(item);
};
List.prototype.appendData = function(data) {
return this.insert(createItem(data));
};
List.prototype.insert = function(item, before) {
if (before !== undefined && before !== null) {
// prev before
// ^
// item
this.updateCursors(before.prev, item, before, item);
if (before.prev === null) {
// insert to the beginning of list
if (this.head !== before) {
throw new Error('before doesn\'t belong to list');
}
// since head points to before therefore list doesn't empty
// no need to check tail
this.head = item;
before.prev = item;
item.next = before;
this.updateCursors(null, item);
} else {
// insert between two items
before.prev.next = item;
item.prev = before.prev;
before.prev = item;
item.next = before;
}
} else {
// tail
// ^
// item
this.updateCursors(this.tail, item, null, item);
// insert to the ending of the list
if (this.tail !== null) {
// last item -> new item
this.tail.next = item;
// last item <- new item
item.prev = this.tail;
} else {
// if list has no tail, then it also has no head
// in this case head points to new item
this.head = item;
}
// tail always points to new item
this.tail = item;
}
return this;
};
List.prototype.insertData = function(data, before) {
return this.insert(createItem(data), before);
};
List.prototype.remove = function(item) {
// item
// ^
// prev next
this.updateCursors(item, item.prev, item, item.next);
if (item.prev !== null) {
item.prev.next = item.next;
} else {
if (this.head !== item) {
throw new Error('item doesn\'t belong to list');
}
this.head = item.next;
}
if (item.next !== null) {
item.next.prev = item.prev;
} else {
if (this.tail !== item) {
throw new Error('item doesn\'t belong to list');
}
this.tail = item.prev;
}
item.prev = null;
item.next = null;
return item;
};
List.prototype.push = function(data) {
this.insert(createItem(data));
};
List.prototype.pop = function() {
if (this.tail !== null) {
return this.remove(this.tail);
}
};
List.prototype.unshift = function(data) {
this.prepend(createItem(data));
};
List.prototype.shift = function() {
if (this.head !== null) {
return this.remove(this.head);
}
};
List.prototype.prependList = function(list) {
return this.insertList(list, this.head);
};
List.prototype.appendList = function(list) {
return this.insertList(list);
};
List.prototype.insertList = function(list, before) {
// ignore empty lists
if (list.head === null) {
return this;
}
if (before !== undefined && before !== null) {
this.updateCursors(before.prev, list.tail, before, list.head);
// insert in the middle of dist list
if (before.prev !== null) {
// before.prev <-> list.head
before.prev.next = list.head;
list.head.prev = before.prev;
} else {
this.head = list.head;
}
before.prev = list.tail;
list.tail.next = before;
} else {
this.updateCursors(this.tail, list.tail, null, list.head);
// insert to end of the list
if (this.tail !== null) {
// if destination list has a tail, then it also has a head,
// but head doesn't change
// dest tail -> source head
this.tail.next = list.head;
// dest tail <- source head
list.head.prev = this.tail;
} else {
// if list has no a tail, then it also has no a head
// in this case points head to new item
this.head = list.head;
}
// tail always start point to new item
this.tail = list.tail;
}
list.head = null;
list.tail = null;
return this;
};
List.prototype.replace = function(oldItem, newItemOrList) {
if ('head' in newItemOrList) {
this.insertList(newItemOrList, oldItem);
} else {
this.insert(newItemOrList, oldItem);
}
this.remove(oldItem);
};
module.exports = List;

91
assets_old/node_modules/csso/node_modules/css-tree/lib/common/OffsetToLocation.js generated vendored Normal file
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var adoptBuffer = require('./adopt-buffer');
var isBOM = require('../tokenizer').isBOM;
var N = 10;
var F = 12;
var R = 13;
function computeLinesAndColumns(host, source) {
var sourceLength = source.length;
var lines = adoptBuffer(host.lines, sourceLength); // +1
var line = host.startLine;
var columns = adoptBuffer(host.columns, sourceLength);
var column = host.startColumn;
var startOffset = source.length > 0 ? isBOM(source.charCodeAt(0)) : 0;
for (var i = startOffset; i < sourceLength; i++) { // -1
var code = source.charCodeAt(i);
lines[i] = line;
columns[i] = column++;
if (code === N || code === R || code === F) {
if (code === R && i + 1 < sourceLength && source.charCodeAt(i + 1) === N) {
i++;
lines[i] = line;
columns[i] = column;
}
line++;
column = 1;
}
}
lines[i] = line;
columns[i] = column;
host.lines = lines;
host.columns = columns;
}
var OffsetToLocation = function() {
this.lines = null;
this.columns = null;
this.linesAndColumnsComputed = false;
};
OffsetToLocation.prototype = {
setSource: function(source, startOffset, startLine, startColumn) {
this.source = source;
this.startOffset = typeof startOffset === 'undefined' ? 0 : startOffset;
this.startLine = typeof startLine === 'undefined' ? 1 : startLine;
this.startColumn = typeof startColumn === 'undefined' ? 1 : startColumn;
this.linesAndColumnsComputed = false;
},
ensureLinesAndColumnsComputed: function() {
if (!this.linesAndColumnsComputed) {
computeLinesAndColumns(this, this.source);
this.linesAndColumnsComputed = true;
}
},
getLocation: function(offset, filename) {
this.ensureLinesAndColumnsComputed();
return {
source: filename,
offset: this.startOffset + offset,
line: this.lines[offset],
column: this.columns[offset]
};
},
getLocationRange: function(start, end, filename) {
this.ensureLinesAndColumnsComputed();
return {
source: filename,
start: {
offset: this.startOffset + start,
line: this.lines[start],
column: this.columns[start]
},
end: {
offset: this.startOffset + end,
line: this.lines[end],
column: this.columns[end]
}
};
}
};
module.exports = OffsetToLocation;

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assets_old/node_modules/csso/node_modules/css-tree/lib/common/SyntaxError.js generated vendored Normal file
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var createCustomError = require('../utils/createCustomError');
var MAX_LINE_LENGTH = 100;
var OFFSET_CORRECTION = 60;
var TAB_REPLACEMENT = ' ';
function sourceFragment(error, extraLines) {
function processLines(start, end) {
return lines.slice(start, end).map(function(line, idx) {
var num = String(start + idx + 1);
while (num.length < maxNumLength) {
num = ' ' + num;
}
return num + ' |' + line;
}).join('\n');
}
var lines = error.source.split(/\r\n?|\n|\f/);
var line = error.line;
var column = error.column;
var startLine = Math.max(1, line - extraLines) - 1;
var endLine = Math.min(line + extraLines, lines.length + 1);
var maxNumLength = Math.max(4, String(endLine).length) + 1;
var cutLeft = 0;
// column correction according to replaced tab before column
column += (TAB_REPLACEMENT.length - 1) * (lines[line - 1].substr(0, column - 1).match(/\t/g) || []).length;
if (column > MAX_LINE_LENGTH) {
cutLeft = column - OFFSET_CORRECTION + 3;
column = OFFSET_CORRECTION - 2;
}
for (var i = startLine; i <= endLine; i++) {
if (i >= 0 && i < lines.length) {
lines[i] = lines[i].replace(/\t/g, TAB_REPLACEMENT);
lines[i] =
(cutLeft > 0 && lines[i].length > cutLeft ? '\u2026' : '') +
lines[i].substr(cutLeft, MAX_LINE_LENGTH - 2) +
(lines[i].length > cutLeft + MAX_LINE_LENGTH - 1 ? '\u2026' : '');
}
}
return [
processLines(startLine, line),
new Array(column + maxNumLength + 2).join('-') + '^',
processLines(line, endLine)
].filter(Boolean).join('\n');
}
var SyntaxError = function(message, source, offset, line, column) {
var error = createCustomError('SyntaxError', message);
error.source = source;
error.offset = offset;
error.line = line;
error.column = column;
error.sourceFragment = function(extraLines) {
return sourceFragment(error, isNaN(extraLines) ? 0 : extraLines);
};
Object.defineProperty(error, 'formattedMessage', {
get: function() {
return (
'Parse error: ' + error.message + '\n' +
sourceFragment(error, 2)
);
}
});
// for backward capability
error.parseError = {
offset: offset,
line: line,
column: column
};
return error;
};
module.exports = SyntaxError;

219
assets_old/node_modules/csso/node_modules/css-tree/lib/common/TokenStream.js generated vendored Normal file
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var constants = require('../tokenizer/const');
var TYPE = constants.TYPE;
var NAME = constants.NAME;
var utils = require('../tokenizer/utils');
var cmpStr = utils.cmpStr;
var EOF = TYPE.EOF;
var WHITESPACE = TYPE.WhiteSpace;
var COMMENT = TYPE.Comment;
var OFFSET_MASK = 0x00FFFFFF;
var TYPE_SHIFT = 24;
var TokenStream = function() {
this.offsetAndType = null;
this.balance = null;
this.reset();
};
TokenStream.prototype = {
reset: function() {
this.eof = false;
this.tokenIndex = -1;
this.tokenType = 0;
this.tokenStart = this.firstCharOffset;
this.tokenEnd = this.firstCharOffset;
},
lookupType: function(offset) {
offset += this.tokenIndex;
if (offset < this.tokenCount) {
return this.offsetAndType[offset] >> TYPE_SHIFT;
}
return EOF;
},
lookupOffset: function(offset) {
offset += this.tokenIndex;
if (offset < this.tokenCount) {
return this.offsetAndType[offset - 1] & OFFSET_MASK;
}
return this.source.length;
},
lookupValue: function(offset, referenceStr) {
offset += this.tokenIndex;
if (offset < this.tokenCount) {
return cmpStr(
this.source,
this.offsetAndType[offset - 1] & OFFSET_MASK,
this.offsetAndType[offset] & OFFSET_MASK,
referenceStr
);
}
return false;
},
getTokenStart: function(tokenIndex) {
if (tokenIndex === this.tokenIndex) {
return this.tokenStart;
}
if (tokenIndex > 0) {
return tokenIndex < this.tokenCount
? this.offsetAndType[tokenIndex - 1] & OFFSET_MASK
: this.offsetAndType[this.tokenCount] & OFFSET_MASK;
}
return this.firstCharOffset;
},
// TODO: -> skipUntilBalanced
getRawLength: function(startToken, mode) {
var cursor = startToken;
var balanceEnd;
var offset = this.offsetAndType[Math.max(cursor - 1, 0)] & OFFSET_MASK;
var type;
loop:
for (; cursor < this.tokenCount; cursor++) {
balanceEnd = this.balance[cursor];
// stop scanning on balance edge that points to offset before start token
if (balanceEnd < startToken) {
break loop;
}
type = this.offsetAndType[cursor] >> TYPE_SHIFT;
// check token is stop type
switch (mode(type, this.source, offset)) {
case 1:
break loop;
case 2:
cursor++;
break loop;
default:
offset = this.offsetAndType[cursor] & OFFSET_MASK;
// fast forward to the end of balanced block
if (this.balance[balanceEnd] === cursor) {
cursor = balanceEnd;
}
}
}
return cursor - this.tokenIndex;
},
isBalanceEdge: function(pos) {
return this.balance[this.tokenIndex] < pos;
},
isDelim: function(code, offset) {
if (offset) {
return (
this.lookupType(offset) === TYPE.Delim &&
this.source.charCodeAt(this.lookupOffset(offset)) === code
);
}
return (
this.tokenType === TYPE.Delim &&
this.source.charCodeAt(this.tokenStart) === code
);
},
getTokenValue: function() {
return this.source.substring(this.tokenStart, this.tokenEnd);
},
getTokenLength: function() {
return this.tokenEnd - this.tokenStart;
},
substrToCursor: function(start) {
return this.source.substring(start, this.tokenStart);
},
skipWS: function() {
for (var i = this.tokenIndex, skipTokenCount = 0; i < this.tokenCount; i++, skipTokenCount++) {
if ((this.offsetAndType[i] >> TYPE_SHIFT) !== WHITESPACE) {
break;
}
}
if (skipTokenCount > 0) {
this.skip(skipTokenCount);
}
},
skipSC: function() {
while (this.tokenType === WHITESPACE || this.tokenType === COMMENT) {
this.next();
}
},
skip: function(tokenCount) {
var next = this.tokenIndex + tokenCount;
if (next < this.tokenCount) {
this.tokenIndex = next;
this.tokenStart = this.offsetAndType[next - 1] & OFFSET_MASK;
next = this.offsetAndType[next];
this.tokenType = next >> TYPE_SHIFT;
this.tokenEnd = next & OFFSET_MASK;
} else {
this.tokenIndex = this.tokenCount;
this.next();
}
},
next: function() {
var next = this.tokenIndex + 1;
if (next < this.tokenCount) {
this.tokenIndex = next;
this.tokenStart = this.tokenEnd;
next = this.offsetAndType[next];
this.tokenType = next >> TYPE_SHIFT;
this.tokenEnd = next & OFFSET_MASK;
} else {
this.tokenIndex = this.tokenCount;
this.eof = true;
this.tokenType = EOF;
this.tokenStart = this.tokenEnd = this.source.length;
}
},
forEachToken(fn) {
for (var i = 0, offset = this.firstCharOffset; i < this.tokenCount; i++) {
var start = offset;
var item = this.offsetAndType[i];
var end = item & OFFSET_MASK;
var type = item >> TYPE_SHIFT;
offset = end;
fn(type, start, end, i);
}
},
dump() {
var tokens = new Array(this.tokenCount);
this.forEachToken((type, start, end, index) => {
tokens[index] = {
idx: index,
type: NAME[type],
chunk: this.source.substring(start, end),
balance: this.balance[index]
};
});
return tokens;
}
};
module.exports = TokenStream;

10
assets_old/node_modules/csso/node_modules/css-tree/lib/common/adopt-buffer.js generated vendored Normal file
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var MIN_SIZE = 16 * 1024;
var SafeUint32Array = typeof Uint32Array !== 'undefined' ? Uint32Array : Array; // fallback on Array when TypedArray is not supported
module.exports = function adoptBuffer(buffer, size) {
if (buffer === null || buffer.length < size) {
return new SafeUint32Array(Math.max(size + 1024, MIN_SIZE));
}
return buffer;
};

28
assets_old/node_modules/csso/node_modules/css-tree/lib/convertor/create.js generated vendored Normal file
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var List = require('../common/List');
module.exports = function createConvertors(walk) {
return {
fromPlainObject: function(ast) {
walk(ast, {
enter: function(node) {
if (node.children && node.children instanceof List === false) {
node.children = new List().fromArray(node.children);
}
}
});
return ast;
},
toPlainObject: function(ast) {
walk(ast, {
leave: function(node) {
if (node.children && node.children instanceof List) {
node.children = node.children.toArray();
}
}
});
return ast;
}
};
};

3
assets_old/node_modules/csso/node_modules/css-tree/lib/convertor/index.js generated vendored Normal file
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var createConvertor = require('./create');
module.exports = createConvertor(require('../walker'));

14
assets_old/node_modules/csso/node_modules/css-tree/lib/definition-syntax/SyntaxError.js generated vendored Normal file
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var createCustomError = require('../utils/createCustomError');
module.exports = function SyntaxError(message, input, offset) {
var error = createCustomError('SyntaxError', message);
error.input = input;
error.offset = offset;
error.rawMessage = message;
error.message = error.rawMessage + '\n' +
' ' + error.input + '\n' +
'--' + new Array((error.offset || error.input.length) + 1).join('-') + '^';
return error;
};

129
assets_old/node_modules/csso/node_modules/css-tree/lib/definition-syntax/generate.js generated vendored Normal file
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function noop(value) {
return value;
}
function generateMultiplier(multiplier) {
if (multiplier.min === 0 && multiplier.max === 0) {
return '*';
}
if (multiplier.min === 0 && multiplier.max === 1) {
return '?';
}
if (multiplier.min === 1 && multiplier.max === 0) {
return multiplier.comma ? '#' : '+';
}
if (multiplier.min === 1 && multiplier.max === 1) {
return '';
}
return (
(multiplier.comma ? '#' : '') +
(multiplier.min === multiplier.max
? '{' + multiplier.min + '}'
: '{' + multiplier.min + ',' + (multiplier.max !== 0 ? multiplier.max : '') + '}'
)
);
}
function generateTypeOpts(node) {
switch (node.type) {
case 'Range':
return (
' [' +
(node.min === null ? '-∞' : node.min) +
',' +
(node.max === null ? '∞' : node.max) +
']'
);
default:
throw new Error('Unknown node type `' + node.type + '`');
}
}
function generateSequence(node, decorate, forceBraces, compact) {
var combinator = node.combinator === ' ' || compact ? node.combinator : ' ' + node.combinator + ' ';
var result = node.terms.map(function(term) {
return generate(term, decorate, forceBraces, compact);
}).join(combinator);
if (node.explicit || forceBraces) {
result = (compact || result[0] === ',' ? '[' : '[ ') + result + (compact ? ']' : ' ]');
}
return result;
}
function generate(node, decorate, forceBraces, compact) {
var result;
switch (node.type) {
case 'Group':
result =
generateSequence(node, decorate, forceBraces, compact) +
(node.disallowEmpty ? '!' : '');
break;
case 'Multiplier':
// return since node is a composition
return (
generate(node.term, decorate, forceBraces, compact) +
decorate(generateMultiplier(node), node)
);
case 'Type':
result = '<' + node.name + (node.opts ? decorate(generateTypeOpts(node.opts), node.opts) : '') + '>';
break;
case 'Property':
result = '<\'' + node.name + '\'>';
break;
case 'Keyword':
result = node.name;
break;
case 'AtKeyword':
result = '@' + node.name;
break;
case 'Function':
result = node.name + '(';
break;
case 'String':
case 'Token':
result = node.value;
break;
case 'Comma':
result = ',';
break;
default:
throw new Error('Unknown node type `' + node.type + '`');
}
return decorate(result, node);
}
module.exports = function(node, options) {
var decorate = noop;
var forceBraces = false;
var compact = false;
if (typeof options === 'function') {
decorate = options;
} else if (options) {
forceBraces = Boolean(options.forceBraces);
compact = Boolean(options.compact);
if (typeof options.decorate === 'function') {
decorate = options.decorate;
}
}
return generate(node, decorate, forceBraces, compact);
};

6
assets_old/node_modules/csso/node_modules/css-tree/lib/definition-syntax/index.js generated vendored Normal file
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module.exports = {
SyntaxError: require('./SyntaxError'),
parse: require('./parse'),
generate: require('./generate'),
walk: require('./walk')
};

568
assets_old/node_modules/csso/node_modules/css-tree/lib/definition-syntax/parse.js generated vendored Normal file
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var Tokenizer = require('./tokenizer');
var TAB = 9;
var N = 10;
var F = 12;
var R = 13;
var SPACE = 32;
var EXCLAMATIONMARK = 33; // !
var NUMBERSIGN = 35; // #
var AMPERSAND = 38; // &
var APOSTROPHE = 39; // '
var LEFTPARENTHESIS = 40; // (
var RIGHTPARENTHESIS = 41; // )
var ASTERISK = 42; // *
var PLUSSIGN = 43; // +
var COMMA = 44; // ,
var HYPERMINUS = 45; // -
var LESSTHANSIGN = 60; // <
var GREATERTHANSIGN = 62; // >
var QUESTIONMARK = 63; // ?
var COMMERCIALAT = 64; // @
var LEFTSQUAREBRACKET = 91; // [
var RIGHTSQUAREBRACKET = 93; // ]
var LEFTCURLYBRACKET = 123; // {
var VERTICALLINE = 124; // |
var RIGHTCURLYBRACKET = 125; // }
var INFINITY = 8734; // ∞
var NAME_CHAR = createCharMap(function(ch) {
return /[a-zA-Z0-9\-]/.test(ch);
});
var COMBINATOR_PRECEDENCE = {
' ': 1,
'&&': 2,
'||': 3,
'|': 4
};
function createCharMap(fn) {
var array = typeof Uint32Array === 'function' ? new Uint32Array(128) : new Array(128);
for (var i = 0; i < 128; i++) {
array[i] = fn(String.fromCharCode(i)) ? 1 : 0;
}
return array;
}
function scanSpaces(tokenizer) {
return tokenizer.substringToPos(
tokenizer.findWsEnd(tokenizer.pos)
);
}
function scanWord(tokenizer) {
var end = tokenizer.pos;
for (; end < tokenizer.str.length; end++) {
var code = tokenizer.str.charCodeAt(end);
if (code >= 128 || NAME_CHAR[code] === 0) {
break;
}
}
if (tokenizer.pos === end) {
tokenizer.error('Expect a keyword');
}
return tokenizer.substringToPos(end);
}
function scanNumber(tokenizer) {
var end = tokenizer.pos;
for (; end < tokenizer.str.length; end++) {
var code = tokenizer.str.charCodeAt(end);
if (code < 48 || code > 57) {
break;
}
}
if (tokenizer.pos === end) {
tokenizer.error('Expect a number');
}
return tokenizer.substringToPos(end);
}
function scanString(tokenizer) {
var end = tokenizer.str.indexOf('\'', tokenizer.pos + 1);
if (end === -1) {
tokenizer.pos = tokenizer.str.length;
tokenizer.error('Expect an apostrophe');
}
return tokenizer.substringToPos(end + 1);
}
function readMultiplierRange(tokenizer) {
var min = null;
var max = null;
tokenizer.eat(LEFTCURLYBRACKET);
min = scanNumber(tokenizer);
if (tokenizer.charCode() === COMMA) {
tokenizer.pos++;
if (tokenizer.charCode() !== RIGHTCURLYBRACKET) {
max = scanNumber(tokenizer);
}
} else {
max = min;
}
tokenizer.eat(RIGHTCURLYBRACKET);
return {
min: Number(min),
max: max ? Number(max) : 0
};
}
function readMultiplier(tokenizer) {
var range = null;
var comma = false;
switch (tokenizer.charCode()) {
case ASTERISK:
tokenizer.pos++;
range = {
min: 0,
max: 0
};
break;
case PLUSSIGN:
tokenizer.pos++;
range = {
min: 1,
max: 0
};
break;
case QUESTIONMARK:
tokenizer.pos++;
range = {
min: 0,
max: 1
};
break;
case NUMBERSIGN:
tokenizer.pos++;
comma = true;
if (tokenizer.charCode() === LEFTCURLYBRACKET) {
range = readMultiplierRange(tokenizer);
} else {
range = {
min: 1,
max: 0
};
}
break;
case LEFTCURLYBRACKET:
range = readMultiplierRange(tokenizer);
break;
default:
return null;
}
return {
type: 'Multiplier',
comma: comma,
min: range.min,
max: range.max,
term: null
};
}
function maybeMultiplied(tokenizer, node) {
var multiplier = readMultiplier(tokenizer);
if (multiplier !== null) {
multiplier.term = node;
return multiplier;
}
return node;
}
function maybeToken(tokenizer) {
var ch = tokenizer.peek();
if (ch === '') {
return null;
}
return {
type: 'Token',
value: ch
};
}
function readProperty(tokenizer) {
var name;
tokenizer.eat(LESSTHANSIGN);
tokenizer.eat(APOSTROPHE);
name = scanWord(tokenizer);
tokenizer.eat(APOSTROPHE);
tokenizer.eat(GREATERTHANSIGN);
return maybeMultiplied(tokenizer, {
type: 'Property',
name: name
});
}
// https://drafts.csswg.org/css-values-3/#numeric-ranges
// 4.1. Range Restrictions and Range Definition Notation
//
// Range restrictions can be annotated in the numeric type notation using CSS bracketed
// range notation—[min,max]—within the angle brackets, after the identifying keyword,
// indicating a closed range between (and including) min and max.
// For example, <integer [0, 10]> indicates an integer between 0 and 10, inclusive.
function readTypeRange(tokenizer) {
// use null for Infinity to make AST format JSON serializable/deserializable
var min = null; // -Infinity
var max = null; // Infinity
var sign = 1;
tokenizer.eat(LEFTSQUAREBRACKET);
if (tokenizer.charCode() === HYPERMINUS) {
tokenizer.peek();
sign = -1;
}
if (sign == -1 && tokenizer.charCode() === INFINITY) {
tokenizer.peek();
} else {
min = sign * Number(scanNumber(tokenizer));
}
scanSpaces(tokenizer);
tokenizer.eat(COMMA);
scanSpaces(tokenizer);
if (tokenizer.charCode() === INFINITY) {
tokenizer.peek();
} else {
sign = 1;
if (tokenizer.charCode() === HYPERMINUS) {
tokenizer.peek();
sign = -1;
}
max = sign * Number(scanNumber(tokenizer));
}
tokenizer.eat(RIGHTSQUAREBRACKET);
// If no range is indicated, either by using the bracketed range notation
// or in the property description, then [−∞,∞] is assumed.
if (min === null && max === null) {
return null;
}
return {
type: 'Range',
min: min,
max: max
};
}
function readType(tokenizer) {
var name;
var opts = null;
tokenizer.eat(LESSTHANSIGN);
name = scanWord(tokenizer);
if (tokenizer.charCode() === LEFTPARENTHESIS &&
tokenizer.nextCharCode() === RIGHTPARENTHESIS) {
tokenizer.pos += 2;
name += '()';
}
if (tokenizer.charCodeAt(tokenizer.findWsEnd(tokenizer.pos)) === LEFTSQUAREBRACKET) {
scanSpaces(tokenizer);
opts = readTypeRange(tokenizer);
}
tokenizer.eat(GREATERTHANSIGN);
return maybeMultiplied(tokenizer, {
type: 'Type',
name: name,
opts: opts
});
}
function readKeywordOrFunction(tokenizer) {
var name;
name = scanWord(tokenizer);
if (tokenizer.charCode() === LEFTPARENTHESIS) {
tokenizer.pos++;
return {
type: 'Function',
name: name
};
}
return maybeMultiplied(tokenizer, {
type: 'Keyword',
name: name
});
}
function regroupTerms(terms, combinators) {
function createGroup(terms, combinator) {
return {
type: 'Group',
terms: terms,
combinator: combinator,
disallowEmpty: false,
explicit: false
};
}
combinators = Object.keys(combinators).sort(function(a, b) {
return COMBINATOR_PRECEDENCE[a] - COMBINATOR_PRECEDENCE[b];
});
while (combinators.length > 0) {
var combinator = combinators.shift();
for (var i = 0, subgroupStart = 0; i < terms.length; i++) {
var term = terms[i];
if (term.type === 'Combinator') {
if (term.value === combinator) {
if (subgroupStart === -1) {
subgroupStart = i - 1;
}
terms.splice(i, 1);
i--;
} else {
if (subgroupStart !== -1 && i - subgroupStart > 1) {
terms.splice(
subgroupStart,
i - subgroupStart,
createGroup(terms.slice(subgroupStart, i), combinator)
);
i = subgroupStart + 1;
}
subgroupStart = -1;
}
}
}
if (subgroupStart !== -1 && combinators.length) {
terms.splice(
subgroupStart,
i - subgroupStart,
createGroup(terms.slice(subgroupStart, i), combinator)
);
}
}
return combinator;
}
function readImplicitGroup(tokenizer) {
var terms = [];
var combinators = {};
var token;
var prevToken = null;
var prevTokenPos = tokenizer.pos;
while (token = peek(tokenizer)) {
if (token.type !== 'Spaces') {
if (token.type === 'Combinator') {
// check for combinator in group beginning and double combinator sequence
if (prevToken === null || prevToken.type === 'Combinator') {
tokenizer.pos = prevTokenPos;
tokenizer.error('Unexpected combinator');
}
combinators[token.value] = true;
} else if (prevToken !== null && prevToken.type !== 'Combinator') {
combinators[' '] = true; // a b
terms.push({
type: 'Combinator',
value: ' '
});
}
terms.push(token);
prevToken = token;
prevTokenPos = tokenizer.pos;
}
}
// check for combinator in group ending
if (prevToken !== null && prevToken.type === 'Combinator') {
tokenizer.pos -= prevTokenPos;
tokenizer.error('Unexpected combinator');
}
return {
type: 'Group',
terms: terms,
combinator: regroupTerms(terms, combinators) || ' ',
disallowEmpty: false,
explicit: false
};
}
function readGroup(tokenizer) {
var result;
tokenizer.eat(LEFTSQUAREBRACKET);
result = readImplicitGroup(tokenizer);
tokenizer.eat(RIGHTSQUAREBRACKET);
result.explicit = true;
if (tokenizer.charCode() === EXCLAMATIONMARK) {
tokenizer.pos++;
result.disallowEmpty = true;
}
return result;
}
function peek(tokenizer) {
var code = tokenizer.charCode();
if (code < 128 && NAME_CHAR[code] === 1) {
return readKeywordOrFunction(tokenizer);
}
switch (code) {
case RIGHTSQUAREBRACKET:
// don't eat, stop scan a group
break;
case LEFTSQUAREBRACKET:
return maybeMultiplied(tokenizer, readGroup(tokenizer));
case LESSTHANSIGN:
return tokenizer.nextCharCode() === APOSTROPHE
? readProperty(tokenizer)
: readType(tokenizer);
case VERTICALLINE:
return {
type: 'Combinator',
value: tokenizer.substringToPos(
tokenizer.nextCharCode() === VERTICALLINE
? tokenizer.pos + 2
: tokenizer.pos + 1
)
};
case AMPERSAND:
tokenizer.pos++;
tokenizer.eat(AMPERSAND);
return {
type: 'Combinator',
value: '&&'
};
case COMMA:
tokenizer.pos++;
return {
type: 'Comma'
};
case APOSTROPHE:
return maybeMultiplied(tokenizer, {
type: 'String',
value: scanString(tokenizer)
});
case SPACE:
case TAB:
case N:
case R:
case F:
return {
type: 'Spaces',
value: scanSpaces(tokenizer)
};
case COMMERCIALAT:
code = tokenizer.nextCharCode();
if (code < 128 && NAME_CHAR[code] === 1) {
tokenizer.pos++;
return {
type: 'AtKeyword',
name: scanWord(tokenizer)
};
}
return maybeToken(tokenizer);
case ASTERISK:
case PLUSSIGN:
case QUESTIONMARK:
case NUMBERSIGN:
case EXCLAMATIONMARK:
// prohibited tokens (used as a multiplier start)
break;
case LEFTCURLYBRACKET:
// LEFTCURLYBRACKET is allowed since mdn/data uses it w/o quoting
// check next char isn't a number, because it's likely a disjoined multiplier
code = tokenizer.nextCharCode();
if (code < 48 || code > 57) {
return maybeToken(tokenizer);
}
break;
default:
return maybeToken(tokenizer);
}
}
function parse(source) {
var tokenizer = new Tokenizer(source);
var result = readImplicitGroup(tokenizer);
if (tokenizer.pos !== source.length) {
tokenizer.error('Unexpected input');
}
// reduce redundant groups with single group term
if (result.terms.length === 1 && result.terms[0].type === 'Group') {
result = result.terms[0];
}
return result;
}
// warm up parse to elimitate code branches that never execute
// fix soft deoptimizations (insufficient type feedback)
parse('[a&&<b>#|<\'c\'>*||e() f{2} /,(% g#{1,2} h{2,})]!');
module.exports = parse;

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assets_old/node_modules/csso/node_modules/css-tree/lib/definition-syntax/tokenizer.js generated vendored Normal file
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var SyntaxError = require('./SyntaxError');
var TAB = 9;
var N = 10;
var F = 12;
var R = 13;
var SPACE = 32;
var Tokenizer = function(str) {
this.str = str;
this.pos = 0;
};
Tokenizer.prototype = {
charCodeAt: function(pos) {
return pos < this.str.length ? this.str.charCodeAt(pos) : 0;
},
charCode: function() {
return this.charCodeAt(this.pos);
},
nextCharCode: function() {
return this.charCodeAt(this.pos + 1);
},
nextNonWsCode: function(pos) {
return this.charCodeAt(this.findWsEnd(pos));
},
findWsEnd: function(pos) {
for (; pos < this.str.length; pos++) {
var code = this.str.charCodeAt(pos);
if (code !== R && code !== N && code !== F && code !== SPACE && code !== TAB) {
break;
}
}
return pos;
},
substringToPos: function(end) {
return this.str.substring(this.pos, this.pos = end);
},
eat: function(code) {
if (this.charCode() !== code) {
this.error('Expect `' + String.fromCharCode(code) + '`');
}
this.pos++;
},
peek: function() {
return this.pos < this.str.length ? this.str.charAt(this.pos++) : '';
},
error: function(message) {
throw new SyntaxError(message, this.str, this.pos);
}
};
module.exports = Tokenizer;

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assets_old/node_modules/csso/node_modules/css-tree/lib/definition-syntax/walk.js generated vendored Normal file
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var noop = function() {};
function ensureFunction(value) {
return typeof value === 'function' ? value : noop;
}
module.exports = function(node, options, context) {
function walk(node) {
enter.call(context, node);
switch (node.type) {
case 'Group':
node.terms.forEach(walk);
break;
case 'Multiplier':
walk(node.term);
break;
case 'Type':
case 'Property':
case 'Keyword':
case 'AtKeyword':
case 'Function':
case 'String':
case 'Token':
case 'Comma':
break;
default:
throw new Error('Unknown type: ' + node.type);
}
leave.call(context, node);
}
var enter = noop;
var leave = noop;
if (typeof options === 'function') {
enter = options;
} else if (options) {
enter = ensureFunction(options.enter);
leave = ensureFunction(options.leave);
}
if (enter === noop && leave === noop) {
throw new Error('Neither `enter` nor `leave` walker handler is set or both aren\'t a function');
}
walk(node, context);
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/generator/create.js generated vendored Normal file
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var sourceMap = require('./sourceMap');
var hasOwnProperty = Object.prototype.hasOwnProperty;
function processChildren(node, delimeter) {
var list = node.children;
var prev = null;
if (typeof delimeter !== 'function') {
list.forEach(this.node, this);
} else {
list.forEach(function(node) {
if (prev !== null) {
delimeter.call(this, prev);
}
this.node(node);
prev = node;
}, this);
}
}
module.exports = function createGenerator(config) {
function processNode(node) {
if (hasOwnProperty.call(types, node.type)) {
types[node.type].call(this, node);
} else {
throw new Error('Unknown node type: ' + node.type);
}
}
var types = {};
if (config.node) {
for (var name in config.node) {
types[name] = config.node[name].generate;
}
}
return function(node, options) {
var buffer = '';
var handlers = {
children: processChildren,
node: processNode,
chunk: function(chunk) {
buffer += chunk;
},
result: function() {
return buffer;
}
};
if (options) {
if (typeof options.decorator === 'function') {
handlers = options.decorator(handlers);
}
if (options.sourceMap) {
handlers = sourceMap(handlers);
}
}
handlers.node(node);
return handlers.result();
};
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/generator/index.js generated vendored Normal file
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var createGenerator = require('./create');
var config = require('../syntax/config/parser');
module.exports = createGenerator(config);

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assets_old/node_modules/csso/node_modules/css-tree/lib/generator/sourceMap.js generated vendored Normal file
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var SourceMapGenerator = require('source-map/lib/source-map-generator').SourceMapGenerator;
var trackNodes = {
Atrule: true,
Selector: true,
Declaration: true
};
module.exports = function generateSourceMap(handlers) {
var map = new SourceMapGenerator();
var line = 1;
var column = 0;
var generated = {
line: 1,
column: 0
};
var original = {
line: 0, // should be zero to add first mapping
column: 0
};
var sourceMappingActive = false;
var activatedGenerated = {
line: 1,
column: 0
};
var activatedMapping = {
generated: activatedGenerated
};
var handlersNode = handlers.node;
handlers.node = function(node) {
if (node.loc && node.loc.start && trackNodes.hasOwnProperty(node.type)) {
var nodeLine = node.loc.start.line;
var nodeColumn = node.loc.start.column - 1;
if (original.line !== nodeLine ||
original.column !== nodeColumn) {
original.line = nodeLine;
original.column = nodeColumn;
generated.line = line;
generated.column = column;
if (sourceMappingActive) {
sourceMappingActive = false;
if (generated.line !== activatedGenerated.line ||
generated.column !== activatedGenerated.column) {
map.addMapping(activatedMapping);
}
}
sourceMappingActive = true;
map.addMapping({
source: node.loc.source,
original: original,
generated: generated
});
}
}
handlersNode.call(this, node);
if (sourceMappingActive && trackNodes.hasOwnProperty(node.type)) {
activatedGenerated.line = line;
activatedGenerated.column = column;
}
};
var handlersChunk = handlers.chunk;
handlers.chunk = function(chunk) {
for (var i = 0; i < chunk.length; i++) {
if (chunk.charCodeAt(i) === 10) { // \n
line++;
column = 0;
} else {
column++;
}
}
handlersChunk(chunk);
};
var handlersResult = handlers.result;
handlers.result = function() {
if (sourceMappingActive) {
map.addMapping(activatedMapping);
}
return {
css: handlersResult(),
map: map
};
};
return handlers;
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/index.js generated vendored Normal file
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module.exports = require('./syntax');

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assets_old/node_modules/csso/node_modules/css-tree/lib/lexer/Lexer.js generated vendored Normal file
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var SyntaxReferenceError = require('./error').SyntaxReferenceError;
var SyntaxMatchError = require('./error').SyntaxMatchError;
var names = require('../utils/names');
var generic = require('./generic');
var parse = require('../definition-syntax/parse');
var generate = require('../definition-syntax/generate');
var walk = require('../definition-syntax/walk');
var prepareTokens = require('./prepare-tokens');
var buildMatchGraph = require('./match-graph').buildMatchGraph;
var matchAsTree = require('./match').matchAsTree;
var trace = require('./trace');
var search = require('./search');
var getStructureFromConfig = require('./structure').getStructureFromConfig;
var cssWideKeywords = buildMatchGraph('inherit | initial | unset');
var cssWideKeywordsWithExpression = buildMatchGraph('inherit | initial | unset | <-ms-legacy-expression>');
function dumpMapSyntax(map, compact, syntaxAsAst) {
var result = {};
for (var name in map) {
if (map[name].syntax) {
result[name] = syntaxAsAst
? map[name].syntax
: generate(map[name].syntax, { compact: compact });
}
}
return result;
}
function dumpAtruleMapSyntax(map, compact, syntaxAsAst) {
const result = {};
for (const [name, atrule] of Object.entries(map)) {
result[name] = {
prelude: atrule.prelude && (
syntaxAsAst
? atrule.prelude.syntax
: generate(atrule.prelude.syntax, { compact })
),
descriptors: atrule.descriptors && dumpMapSyntax(atrule.descriptors, compact, syntaxAsAst)
};
}
return result;
}
function valueHasVar(tokens) {
for (var i = 0; i < tokens.length; i++) {
if (tokens[i].value.toLowerCase() === 'var(') {
return true;
}
}
return false;
}
function buildMatchResult(match, error, iterations) {
return {
matched: match,
iterations: iterations,
error: error,
getTrace: trace.getTrace,
isType: trace.isType,
isProperty: trace.isProperty,
isKeyword: trace.isKeyword
};
}
function matchSyntax(lexer, syntax, value, useCommon) {
var tokens = prepareTokens(value, lexer.syntax);
var result;
if (valueHasVar(tokens)) {
return buildMatchResult(null, new Error('Matching for a tree with var() is not supported'));
}
if (useCommon) {
result = matchAsTree(tokens, lexer.valueCommonSyntax, lexer);
}
if (!useCommon || !result.match) {
result = matchAsTree(tokens, syntax.match, lexer);
if (!result.match) {
return buildMatchResult(
null,
new SyntaxMatchError(result.reason, syntax.syntax, value, result),
result.iterations
);
}
}
return buildMatchResult(result.match, null, result.iterations);
}
var Lexer = function(config, syntax, structure) {
this.valueCommonSyntax = cssWideKeywords;
this.syntax = syntax;
this.generic = false;
this.atrules = {};
this.properties = {};
this.types = {};
this.structure = structure || getStructureFromConfig(config);
if (config) {
if (config.types) {
for (var name in config.types) {
this.addType_(name, config.types[name]);
}
}
if (config.generic) {
this.generic = true;
for (var name in generic) {
this.addType_(name, generic[name]);
}
}
if (config.atrules) {
for (var name in config.atrules) {
this.addAtrule_(name, config.atrules[name]);
}
}
if (config.properties) {
for (var name in config.properties) {
this.addProperty_(name, config.properties[name]);
}
}
}
};
Lexer.prototype = {
structure: {},
checkStructure: function(ast) {
function collectWarning(node, message) {
warns.push({
node: node,
message: message
});
}
var structure = this.structure;
var warns = [];
this.syntax.walk(ast, function(node) {
if (structure.hasOwnProperty(node.type)) {
structure[node.type].check(node, collectWarning);
} else {
collectWarning(node, 'Unknown node type `' + node.type + '`');
}
});
return warns.length ? warns : false;
},
createDescriptor: function(syntax, type, name, parent = null) {
var ref = {
type: type,
name: name
};
var descriptor = {
type: type,
name: name,
parent: parent,
syntax: null,
match: null
};
if (typeof syntax === 'function') {
descriptor.match = buildMatchGraph(syntax, ref);
} else {
if (typeof syntax === 'string') {
// lazy parsing on first access
Object.defineProperty(descriptor, 'syntax', {
get: function() {
Object.defineProperty(descriptor, 'syntax', {
value: parse(syntax)
});
return descriptor.syntax;
}
});
} else {
descriptor.syntax = syntax;
}
// lazy graph build on first access
Object.defineProperty(descriptor, 'match', {
get: function() {
Object.defineProperty(descriptor, 'match', {
value: buildMatchGraph(descriptor.syntax, ref)
});
return descriptor.match;
}
});
}
return descriptor;
},
addAtrule_: function(name, syntax) {
if (!syntax) {
return;
}
this.atrules[name] = {
type: 'Atrule',
name: name,
prelude: syntax.prelude ? this.createDescriptor(syntax.prelude, 'AtrulePrelude', name) : null,
descriptors: syntax.descriptors
? Object.keys(syntax.descriptors).reduce((res, descName) => {
res[descName] = this.createDescriptor(syntax.descriptors[descName], 'AtruleDescriptor', descName, name);
return res;
}, {})
: null
};
},
addProperty_: function(name, syntax) {
if (!syntax) {
return;
}
this.properties[name] = this.createDescriptor(syntax, 'Property', name);
},
addType_: function(name, syntax) {
if (!syntax) {
return;
}
this.types[name] = this.createDescriptor(syntax, 'Type', name);
if (syntax === generic['-ms-legacy-expression']) {
this.valueCommonSyntax = cssWideKeywordsWithExpression;
}
},
checkAtruleName: function(atruleName) {
if (!this.getAtrule(atruleName)) {
return new SyntaxReferenceError('Unknown at-rule', '@' + atruleName);
}
},
checkAtrulePrelude: function(atruleName, prelude) {
let error = this.checkAtruleName(atruleName);
if (error) {
return error;
}
var atrule = this.getAtrule(atruleName);
if (!atrule.prelude && prelude) {
return new SyntaxError('At-rule `@' + atruleName + '` should not contain a prelude');
}
if (atrule.prelude && !prelude) {
return new SyntaxError('At-rule `@' + atruleName + '` should contain a prelude');
}
},
checkAtruleDescriptorName: function(atruleName, descriptorName) {
let error = this.checkAtruleName(atruleName);
if (error) {
return error;
}
var atrule = this.getAtrule(atruleName);
var descriptor = names.keyword(descriptorName);
if (!atrule.descriptors) {
return new SyntaxError('At-rule `@' + atruleName + '` has no known descriptors');
}
if (!atrule.descriptors[descriptor.name] &&
!atrule.descriptors[descriptor.basename]) {
return new SyntaxReferenceError('Unknown at-rule descriptor', descriptorName);
}
},
checkPropertyName: function(propertyName) {
var property = names.property(propertyName);
// don't match syntax for a custom property
if (property.custom) {
return new Error('Lexer matching doesn\'t applicable for custom properties');
}
if (!this.getProperty(propertyName)) {
return new SyntaxReferenceError('Unknown property', propertyName);
}
},
matchAtrulePrelude: function(atruleName, prelude) {
var error = this.checkAtrulePrelude(atruleName, prelude);
if (error) {
return buildMatchResult(null, error);
}
if (!prelude) {
return buildMatchResult(null, null);
}
return matchSyntax(this, this.getAtrule(atruleName).prelude, prelude, true);
},
matchAtruleDescriptor: function(atruleName, descriptorName, value) {
var error = this.checkAtruleDescriptorName(atruleName, descriptorName);
if (error) {
return buildMatchResult(null, error);
}
var atrule = this.getAtrule(atruleName);
var descriptor = names.keyword(descriptorName);
return matchSyntax(this, atrule.descriptors[descriptor.name] || atrule.descriptors[descriptor.basename], value, true);
},
matchDeclaration: function(node) {
if (node.type !== 'Declaration') {
return buildMatchResult(null, new Error('Not a Declaration node'));
}
return this.matchProperty(node.property, node.value);
},
matchProperty: function(propertyName, value) {
var error = this.checkPropertyName(propertyName);
if (error) {
return buildMatchResult(null, error);
}
return matchSyntax(this, this.getProperty(propertyName), value, true);
},
matchType: function(typeName, value) {
var typeSyntax = this.getType(typeName);
if (!typeSyntax) {
return buildMatchResult(null, new SyntaxReferenceError('Unknown type', typeName));
}
return matchSyntax(this, typeSyntax, value, false);
},
match: function(syntax, value) {
if (typeof syntax !== 'string' && (!syntax || !syntax.type)) {
return buildMatchResult(null, new SyntaxReferenceError('Bad syntax'));
}
if (typeof syntax === 'string' || !syntax.match) {
syntax = this.createDescriptor(syntax, 'Type', 'anonymous');
}
return matchSyntax(this, syntax, value, false);
},
findValueFragments: function(propertyName, value, type, name) {
return search.matchFragments(this, value, this.matchProperty(propertyName, value), type, name);
},
findDeclarationValueFragments: function(declaration, type, name) {
return search.matchFragments(this, declaration.value, this.matchDeclaration(declaration), type, name);
},
findAllFragments: function(ast, type, name) {
var result = [];
this.syntax.walk(ast, {
visit: 'Declaration',
enter: function(declaration) {
result.push.apply(result, this.findDeclarationValueFragments(declaration, type, name));
}.bind(this)
});
return result;
},
getAtrule: function(atruleName, fallbackBasename = true) {
var atrule = names.keyword(atruleName);
var atruleEntry = atrule.vendor && fallbackBasename
? this.atrules[atrule.name] || this.atrules[atrule.basename]
: this.atrules[atrule.name];
return atruleEntry || null;
},
getAtrulePrelude: function(atruleName, fallbackBasename = true) {
const atrule = this.getAtrule(atruleName, fallbackBasename);
return atrule && atrule.prelude || null;
},
getAtruleDescriptor: function(atruleName, name) {
return this.atrules.hasOwnProperty(atruleName) && this.atrules.declarators
? this.atrules[atruleName].declarators[name] || null
: null;
},
getProperty: function(propertyName, fallbackBasename = true) {
var property = names.property(propertyName);
var propertyEntry = property.vendor && fallbackBasename
? this.properties[property.name] || this.properties[property.basename]
: this.properties[property.name];
return propertyEntry || null;
},
getType: function(name) {
return this.types.hasOwnProperty(name) ? this.types[name] : null;
},
validate: function() {
function validate(syntax, name, broken, descriptor) {
if (broken.hasOwnProperty(name)) {
return broken[name];
}
broken[name] = false;
if (descriptor.syntax !== null) {
walk(descriptor.syntax, function(node) {
if (node.type !== 'Type' && node.type !== 'Property') {
return;
}
var map = node.type === 'Type' ? syntax.types : syntax.properties;
var brokenMap = node.type === 'Type' ? brokenTypes : brokenProperties;
if (!map.hasOwnProperty(node.name) || validate(syntax, node.name, brokenMap, map[node.name])) {
broken[name] = true;
}
}, this);
}
}
var brokenTypes = {};
var brokenProperties = {};
for (var key in this.types) {
validate(this, key, brokenTypes, this.types[key]);
}
for (var key in this.properties) {
validate(this, key, brokenProperties, this.properties[key]);
}
brokenTypes = Object.keys(brokenTypes).filter(function(name) {
return brokenTypes[name];
});
brokenProperties = Object.keys(brokenProperties).filter(function(name) {
return brokenProperties[name];
});
if (brokenTypes.length || brokenProperties.length) {
return {
types: brokenTypes,
properties: brokenProperties
};
}
return null;
},
dump: function(syntaxAsAst, pretty) {
return {
generic: this.generic,
types: dumpMapSyntax(this.types, !pretty, syntaxAsAst),
properties: dumpMapSyntax(this.properties, !pretty, syntaxAsAst),
atrules: dumpAtruleMapSyntax(this.atrules, !pretty, syntaxAsAst)
};
},
toString: function() {
return JSON.stringify(this.dump());
}
};
module.exports = Lexer;

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assets_old/node_modules/csso/node_modules/css-tree/lib/lexer/error.js generated vendored Normal file
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const createCustomError = require('../utils/createCustomError');
const generate = require('../definition-syntax/generate');
const defaultLoc = { offset: 0, line: 1, column: 1 };
function locateMismatch(matchResult, node) {
const tokens = matchResult.tokens;
const longestMatch = matchResult.longestMatch;
const mismatchNode = longestMatch < tokens.length ? tokens[longestMatch].node || null : null;
const badNode = mismatchNode !== node ? mismatchNode : null;
let mismatchOffset = 0;
let mismatchLength = 0;
let entries = 0;
let css = '';
let start;
let end;
for (let i = 0; i < tokens.length; i++) {
const token = tokens[i].value;
if (i === longestMatch) {
mismatchLength = token.length;
mismatchOffset = css.length;
}
if (badNode !== null && tokens[i].node === badNode) {
if (i <= longestMatch) {
entries++;
} else {
entries = 0;
}
}
css += token;
}
if (longestMatch === tokens.length || entries > 1) { // last
start = fromLoc(badNode || node, 'end') || buildLoc(defaultLoc, css);
end = buildLoc(start);
} else {
start = fromLoc(badNode, 'start') ||
buildLoc(fromLoc(node, 'start') || defaultLoc, css.slice(0, mismatchOffset));
end = fromLoc(badNode, 'end') ||
buildLoc(start, css.substr(mismatchOffset, mismatchLength));
}
return {
css,
mismatchOffset,
mismatchLength,
start,
end
};
}
function fromLoc(node, point) {
const value = node && node.loc && node.loc[point];
if (value) {
return 'line' in value ? buildLoc(value) : value;
}
return null;
}
function buildLoc({ offset, line, column }, extra) {
const loc = {
offset,
line,
column
};
if (extra) {
const lines = extra.split(/\n|\r\n?|\f/);
loc.offset += extra.length;
loc.line += lines.length - 1;
loc.column = lines.length === 1 ? loc.column + extra.length : lines.pop().length + 1;
}
return loc;
}
const SyntaxReferenceError = function(type, referenceName) {
const error = createCustomError(
'SyntaxReferenceError',
type + (referenceName ? ' `' + referenceName + '`' : '')
);
error.reference = referenceName;
return error;
};
const SyntaxMatchError = function(message, syntax, node, matchResult) {
const error = createCustomError('SyntaxMatchError', message);
const {
css,
mismatchOffset,
mismatchLength,
start,
end
} = locateMismatch(matchResult, node);
error.rawMessage = message;
error.syntax = syntax ? generate(syntax) : '<generic>';
error.css = css;
error.mismatchOffset = mismatchOffset;
error.mismatchLength = mismatchLength;
error.message = message + '\n' +
' syntax: ' + error.syntax + '\n' +
' value: ' + (css || '<empty string>') + '\n' +
' --------' + new Array(error.mismatchOffset + 1).join('-') + '^';
Object.assign(error, start);
error.loc = {
source: (node && node.loc && node.loc.source) || '<unknown>',
start,
end
};
return error;
};
module.exports = {
SyntaxReferenceError,
SyntaxMatchError
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/lexer/generic-an-plus-b.js generated vendored Normal file
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var isDigit = require('../tokenizer').isDigit;
var cmpChar = require('../tokenizer').cmpChar;
var TYPE = require('../tokenizer').TYPE;
var DELIM = TYPE.Delim;
var WHITESPACE = TYPE.WhiteSpace;
var COMMENT = TYPE.Comment;
var IDENT = TYPE.Ident;
var NUMBER = TYPE.Number;
var DIMENSION = TYPE.Dimension;
var PLUSSIGN = 0x002B; // U+002B PLUS SIGN (+)
var HYPHENMINUS = 0x002D; // U+002D HYPHEN-MINUS (-)
var N = 0x006E; // U+006E LATIN SMALL LETTER N (n)
var DISALLOW_SIGN = true;
var ALLOW_SIGN = false;
function isDelim(token, code) {
return token !== null && token.type === DELIM && token.value.charCodeAt(0) === code;
}
function skipSC(token, offset, getNextToken) {
while (token !== null && (token.type === WHITESPACE || token.type === COMMENT)) {
token = getNextToken(++offset);
}
return offset;
}
function checkInteger(token, valueOffset, disallowSign, offset) {
if (!token) {
return 0;
}
var code = token.value.charCodeAt(valueOffset);
if (code === PLUSSIGN || code === HYPHENMINUS) {
if (disallowSign) {
// Number sign is not allowed
return 0;
}
valueOffset++;
}
for (; valueOffset < token.value.length; valueOffset++) {
if (!isDigit(token.value.charCodeAt(valueOffset))) {
// Integer is expected
return 0;
}
}
return offset + 1;
}
// ... <signed-integer>
// ... ['+' | '-'] <signless-integer>
function consumeB(token, offset_, getNextToken) {
var sign = false;
var offset = skipSC(token, offset_, getNextToken);
token = getNextToken(offset);
if (token === null) {
return offset_;
}
if (token.type !== NUMBER) {
if (isDelim(token, PLUSSIGN) || isDelim(token, HYPHENMINUS)) {
sign = true;
offset = skipSC(getNextToken(++offset), offset, getNextToken);
token = getNextToken(offset);
if (token === null && token.type !== NUMBER) {
return 0;
}
} else {
return offset_;
}
}
if (!sign) {
var code = token.value.charCodeAt(0);
if (code !== PLUSSIGN && code !== HYPHENMINUS) {
// Number sign is expected
return 0;
}
}
return checkInteger(token, sign ? 0 : 1, sign, offset);
}
// An+B microsyntax https://www.w3.org/TR/css-syntax-3/#anb
module.exports = function anPlusB(token, getNextToken) {
/* eslint-disable brace-style*/
var offset = 0;
if (!token) {
return 0;
}
// <integer>
if (token.type === NUMBER) {
return checkInteger(token, 0, ALLOW_SIGN, offset); // b
}
// -n
// -n <signed-integer>
// -n ['+' | '-'] <signless-integer>
// -n- <signless-integer>
// <dashndashdigit-ident>
else if (token.type === IDENT && token.value.charCodeAt(0) === HYPHENMINUS) {
// expect 1st char is N
if (!cmpChar(token.value, 1, N)) {
return 0;
}
switch (token.value.length) {
// -n
// -n <signed-integer>
// -n ['+' | '-'] <signless-integer>
case 2:
return consumeB(getNextToken(++offset), offset, getNextToken);
// -n- <signless-integer>
case 3:
if (token.value.charCodeAt(2) !== HYPHENMINUS) {
return 0;
}
offset = skipSC(getNextToken(++offset), offset, getNextToken);
token = getNextToken(offset);
return checkInteger(token, 0, DISALLOW_SIGN, offset);
// <dashndashdigit-ident>
default:
if (token.value.charCodeAt(2) !== HYPHENMINUS) {
return 0;
}
return checkInteger(token, 3, DISALLOW_SIGN, offset);
}
}
// '+'? n
// '+'? n <signed-integer>
// '+'? n ['+' | '-'] <signless-integer>
// '+'? n- <signless-integer>
// '+'? <ndashdigit-ident>
else if (token.type === IDENT || (isDelim(token, PLUSSIGN) && getNextToken(offset + 1).type === IDENT)) {
// just ignore a plus
if (token.type !== IDENT) {
token = getNextToken(++offset);
}
if (token === null || !cmpChar(token.value, 0, N)) {
return 0;
}
switch (token.value.length) {
// '+'? n
// '+'? n <signed-integer>
// '+'? n ['+' | '-'] <signless-integer>
case 1:
return consumeB(getNextToken(++offset), offset, getNextToken);
// '+'? n- <signless-integer>
case 2:
if (token.value.charCodeAt(1) !== HYPHENMINUS) {
return 0;
}
offset = skipSC(getNextToken(++offset), offset, getNextToken);
token = getNextToken(offset);
return checkInteger(token, 0, DISALLOW_SIGN, offset);
// '+'? <ndashdigit-ident>
default:
if (token.value.charCodeAt(1) !== HYPHENMINUS) {
return 0;
}
return checkInteger(token, 2, DISALLOW_SIGN, offset);
}
}
// <ndashdigit-dimension>
// <ndash-dimension> <signless-integer>
// <n-dimension>
// <n-dimension> <signed-integer>
// <n-dimension> ['+' | '-'] <signless-integer>
else if (token.type === DIMENSION) {
var code = token.value.charCodeAt(0);
var sign = code === PLUSSIGN || code === HYPHENMINUS ? 1 : 0;
for (var i = sign; i < token.value.length; i++) {
if (!isDigit(token.value.charCodeAt(i))) {
break;
}
}
if (i === sign) {
// Integer is expected
return 0;
}
if (!cmpChar(token.value, i, N)) {
return 0;
}
// <n-dimension>
// <n-dimension> <signed-integer>
// <n-dimension> ['+' | '-'] <signless-integer>
if (i + 1 === token.value.length) {
return consumeB(getNextToken(++offset), offset, getNextToken);
} else {
if (token.value.charCodeAt(i + 1) !== HYPHENMINUS) {
return 0;
}
// <ndash-dimension> <signless-integer>
if (i + 2 === token.value.length) {
offset = skipSC(getNextToken(++offset), offset, getNextToken);
token = getNextToken(offset);
return checkInteger(token, 0, DISALLOW_SIGN, offset);
}
// <ndashdigit-dimension>
else {
return checkInteger(token, i + 2, DISALLOW_SIGN, offset);
}
}
}
return 0;
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/lexer/generic-urange.js generated vendored Normal file
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var isHexDigit = require('../tokenizer').isHexDigit;
var cmpChar = require('../tokenizer').cmpChar;
var TYPE = require('../tokenizer').TYPE;
var IDENT = TYPE.Ident;
var DELIM = TYPE.Delim;
var NUMBER = TYPE.Number;
var DIMENSION = TYPE.Dimension;
var PLUSSIGN = 0x002B; // U+002B PLUS SIGN (+)
var HYPHENMINUS = 0x002D; // U+002D HYPHEN-MINUS (-)
var QUESTIONMARK = 0x003F; // U+003F QUESTION MARK (?)
var U = 0x0075; // U+0075 LATIN SMALL LETTER U (u)
function isDelim(token, code) {
return token !== null && token.type === DELIM && token.value.charCodeAt(0) === code;
}
function startsWith(token, code) {
return token.value.charCodeAt(0) === code;
}
function hexSequence(token, offset, allowDash) {
for (var pos = offset, hexlen = 0; pos < token.value.length; pos++) {
var code = token.value.charCodeAt(pos);
if (code === HYPHENMINUS && allowDash && hexlen !== 0) {
if (hexSequence(token, offset + hexlen + 1, false) > 0) {
return 6; // dissallow following question marks
}
return 0; // dash at the ending of a hex sequence is not allowed
}
if (!isHexDigit(code)) {
return 0; // not a hex digit
}
if (++hexlen > 6) {
return 0; // too many hex digits
};
}
return hexlen;
}
function withQuestionMarkSequence(consumed, length, getNextToken) {
if (!consumed) {
return 0; // nothing consumed
}
while (isDelim(getNextToken(length), QUESTIONMARK)) {
if (++consumed > 6) {
return 0; // too many question marks
}
length++;
}
return length;
}
// https://drafts.csswg.org/css-syntax/#urange
// Informally, the <urange> production has three forms:
// U+0001
// Defines a range consisting of a single code point, in this case the code point "1".
// U+0001-00ff
// Defines a range of codepoints between the first and the second value, in this case
// the range between "1" and "ff" (255 in decimal) inclusive.
// U+00??
// Defines a range of codepoints where the "?" characters range over all hex digits,
// in this case defining the same as the value U+0000-00ff.
// In each form, a maximum of 6 digits is allowed for each hexadecimal number (if you treat "?" as a hexadecimal digit).
//
// <urange> =
// u '+' <ident-token> '?'* |
// u <dimension-token> '?'* |
// u <number-token> '?'* |
// u <number-token> <dimension-token> |
// u <number-token> <number-token> |
// u '+' '?'+
module.exports = function urange(token, getNextToken) {
var length = 0;
// should start with `u` or `U`
if (token === null || token.type !== IDENT || !cmpChar(token.value, 0, U)) {
return 0;
}
token = getNextToken(++length);
if (token === null) {
return 0;
}
// u '+' <ident-token> '?'*
// u '+' '?'+
if (isDelim(token, PLUSSIGN)) {
token = getNextToken(++length);
if (token === null) {
return 0;
}
if (token.type === IDENT) {
// u '+' <ident-token> '?'*
return withQuestionMarkSequence(hexSequence(token, 0, true), ++length, getNextToken);
}
if (isDelim(token, QUESTIONMARK)) {
// u '+' '?'+
return withQuestionMarkSequence(1, ++length, getNextToken);
}
// Hex digit or question mark is expected
return 0;
}
// u <number-token> '?'*
// u <number-token> <dimension-token>
// u <number-token> <number-token>
if (token.type === NUMBER) {
if (!startsWith(token, PLUSSIGN)) {
return 0;
}
var consumedHexLength = hexSequence(token, 1, true);
if (consumedHexLength === 0) {
return 0;
}
token = getNextToken(++length);
if (token === null) {
// u <number-token> <eof>
return length;
}
if (token.type === DIMENSION || token.type === NUMBER) {
// u <number-token> <dimension-token>
// u <number-token> <number-token>
if (!startsWith(token, HYPHENMINUS) || !hexSequence(token, 1, false)) {
return 0;
}
return length + 1;
}
// u <number-token> '?'*
return withQuestionMarkSequence(consumedHexLength, length, getNextToken);
}
// u <dimension-token> '?'*
if (token.type === DIMENSION) {
if (!startsWith(token, PLUSSIGN)) {
return 0;
}
return withQuestionMarkSequence(hexSequence(token, 1, true), ++length, getNextToken);
}
return 0;
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/lexer/generic.js generated vendored Normal file
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var tokenizer = require('../tokenizer');
var isIdentifierStart = tokenizer.isIdentifierStart;
var isHexDigit = tokenizer.isHexDigit;
var isDigit = tokenizer.isDigit;
var cmpStr = tokenizer.cmpStr;
var consumeNumber = tokenizer.consumeNumber;
var TYPE = tokenizer.TYPE;
var anPlusB = require('./generic-an-plus-b');
var urange = require('./generic-urange');
var cssWideKeywords = ['unset', 'initial', 'inherit'];
var calcFunctionNames = ['calc(', '-moz-calc(', '-webkit-calc('];
// https://www.w3.org/TR/css-values-3/#lengths
var LENGTH = {
// absolute length units
'px': true,
'mm': true,
'cm': true,
'in': true,
'pt': true,
'pc': true,
'q': true,
// relative length units
'em': true,
'ex': true,
'ch': true,
'rem': true,
// viewport-percentage lengths
'vh': true,
'vw': true,
'vmin': true,
'vmax': true,
'vm': true
};
var ANGLE = {
'deg': true,
'grad': true,
'rad': true,
'turn': true
};
var TIME = {
's': true,
'ms': true
};
var FREQUENCY = {
'hz': true,
'khz': true
};
// https://www.w3.org/TR/css-values-3/#resolution (https://drafts.csswg.org/css-values/#resolution)
var RESOLUTION = {
'dpi': true,
'dpcm': true,
'dppx': true,
'x': true // https://github.com/w3c/csswg-drafts/issues/461
};
// https://drafts.csswg.org/css-grid/#fr-unit
var FLEX = {
'fr': true
};
// https://www.w3.org/TR/css3-speech/#mixing-props-voice-volume
var DECIBEL = {
'db': true
};
// https://www.w3.org/TR/css3-speech/#voice-props-voice-pitch
var SEMITONES = {
'st': true
};
// safe char code getter
function charCode(str, index) {
return index < str.length ? str.charCodeAt(index) : 0;
}
function eqStr(actual, expected) {
return cmpStr(actual, 0, actual.length, expected);
}
function eqStrAny(actual, expected) {
for (var i = 0; i < expected.length; i++) {
if (eqStr(actual, expected[i])) {
return true;
}
}
return false;
}
// IE postfix hack, i.e. 123\0 or 123px\9
function isPostfixIeHack(str, offset) {
if (offset !== str.length - 2) {
return false;
}
return (
str.charCodeAt(offset) === 0x005C && // U+005C REVERSE SOLIDUS (\)
isDigit(str.charCodeAt(offset + 1))
);
}
function outOfRange(opts, value, numEnd) {
if (opts && opts.type === 'Range') {
var num = Number(
numEnd !== undefined && numEnd !== value.length
? value.substr(0, numEnd)
: value
);
if (isNaN(num)) {
return true;
}
if (opts.min !== null && num < opts.min) {
return true;
}
if (opts.max !== null && num > opts.max) {
return true;
}
}
return false;
}
function consumeFunction(token, getNextToken) {
var startIdx = token.index;
var length = 0;
// balanced token consuming
do {
length++;
if (token.balance <= startIdx) {
break;
}
} while (token = getNextToken(length));
return length;
}
// TODO: implement
// can be used wherever <length>, <frequency>, <angle>, <time>, <percentage>, <number>, or <integer> values are allowed
// https://drafts.csswg.org/css-values/#calc-notation
function calc(next) {
return function(token, getNextToken, opts) {
if (token === null) {
return 0;
}
if (token.type === TYPE.Function && eqStrAny(token.value, calcFunctionNames)) {
return consumeFunction(token, getNextToken);
}
return next(token, getNextToken, opts);
};
}
function tokenType(expectedTokenType) {
return function(token) {
if (token === null || token.type !== expectedTokenType) {
return 0;
}
return 1;
};
}
function func(name) {
name = name + '(';
return function(token, getNextToken) {
if (token !== null && eqStr(token.value, name)) {
return consumeFunction(token, getNextToken);
}
return 0;
};
}
// =========================
// Complex types
//
// https://drafts.csswg.org/css-values-4/#custom-idents
// 4.2. Author-defined Identifiers: the <custom-ident> type
// Some properties accept arbitrary author-defined identifiers as a component value.
// This generic data type is denoted by <custom-ident>, and represents any valid CSS identifier
// that would not be misinterpreted as a pre-defined keyword in that property’s value definition.
//
// See also: https://developer.mozilla.org/en-US/docs/Web/CSS/custom-ident
function customIdent(token) {
if (token === null || token.type !== TYPE.Ident) {
return 0;
}
var name = token.value.toLowerCase();
// The CSS-wide keywords are not valid <custom-ident>s
if (eqStrAny(name, cssWideKeywords)) {
return 0;
}
// The default keyword is reserved and is also not a valid <custom-ident>
if (eqStr(name, 'default')) {
return 0;
}
// TODO: ignore property specific keywords (as described https://developer.mozilla.org/en-US/docs/Web/CSS/custom-ident)
// Specifications using <custom-ident> must specify clearly what other keywords
// are excluded from <custom-ident>, if any—for example by saying that any pre-defined keywords
// in that property’s value definition are excluded. Excluded keywords are excluded
// in all ASCII case permutations.
return 1;
}
// https://drafts.csswg.org/css-variables/#typedef-custom-property-name
// A custom property is any property whose name starts with two dashes (U+002D HYPHEN-MINUS), like --foo.
// The <custom-property-name> production corresponds to this: it’s defined as any valid identifier
// that starts with two dashes, except -- itself, which is reserved for future use by CSS.
// NOTE: Current implementation treat `--` as a valid name since most (all?) major browsers treat it as valid.
function customPropertyName(token) {
// ... defined as any valid identifier
if (token === null || token.type !== TYPE.Ident) {
return 0;
}
// ... that starts with two dashes (U+002D HYPHEN-MINUS)
if (charCode(token.value, 0) !== 0x002D || charCode(token.value, 1) !== 0x002D) {
return 0;
}
return 1;
}
// https://drafts.csswg.org/css-color-4/#hex-notation
// The syntax of a <hex-color> is a <hash-token> token whose value consists of 3, 4, 6, or 8 hexadecimal digits.
// In other words, a hex color is written as a hash character, "#", followed by some number of digits 0-9 or
// letters a-f (the case of the letters doesn’t matter - #00ff00 is identical to #00FF00).
function hexColor(token) {
if (token === null || token.type !== TYPE.Hash) {
return 0;
}
var length = token.value.length;
// valid values (length): #rgb (4), #rgba (5), #rrggbb (7), #rrggbbaa (9)
if (length !== 4 && length !== 5 && length !== 7 && length !== 9) {
return 0;
}
for (var i = 1; i < length; i++) {
if (!isHexDigit(token.value.charCodeAt(i))) {
return 0;
}
}
return 1;
}
function idSelector(token) {
if (token === null || token.type !== TYPE.Hash) {
return 0;
}
if (!isIdentifierStart(charCode(token.value, 1), charCode(token.value, 2), charCode(token.value, 3))) {
return 0;
}
return 1;
}
// https://drafts.csswg.org/css-syntax/#any-value
// It represents the entirety of what a valid declaration can have as its value.
function declarationValue(token, getNextToken) {
if (!token) {
return 0;
}
var length = 0;
var level = 0;
var startIdx = token.index;
// The <declaration-value> production matches any sequence of one or more tokens,
// so long as the sequence ...
scan:
do {
switch (token.type) {
// ... does not contain <bad-string-token>, <bad-url-token>,
case TYPE.BadString:
case TYPE.BadUrl:
break scan;
// ... unmatched <)-token>, <]-token>, or <}-token>,
case TYPE.RightCurlyBracket:
case TYPE.RightParenthesis:
case TYPE.RightSquareBracket:
if (token.balance > token.index || token.balance < startIdx) {
break scan;
}
level--;
break;
// ... or top-level <semicolon-token> tokens
case TYPE.Semicolon:
if (level === 0) {
break scan;
}
break;
// ... or <delim-token> tokens with a value of "!"
case TYPE.Delim:
if (token.value === '!' && level === 0) {
break scan;
}
break;
case TYPE.Function:
case TYPE.LeftParenthesis:
case TYPE.LeftSquareBracket:
case TYPE.LeftCurlyBracket:
level++;
break;
}
length++;
// until balance closing
if (token.balance <= startIdx) {
break;
}
} while (token = getNextToken(length));
return length;
}
// https://drafts.csswg.org/css-syntax/#any-value
// The <any-value> production is identical to <declaration-value>, but also
// allows top-level <semicolon-token> tokens and <delim-token> tokens
// with a value of "!". It represents the entirety of what valid CSS can be in any context.
function anyValue(token, getNextToken) {
if (!token) {
return 0;
}
var startIdx = token.index;
var length = 0;
// The <any-value> production matches any sequence of one or more tokens,
// so long as the sequence ...
scan:
do {
switch (token.type) {
// ... does not contain <bad-string-token>, <bad-url-token>,
case TYPE.BadString:
case TYPE.BadUrl:
break scan;
// ... unmatched <)-token>, <]-token>, or <}-token>,
case TYPE.RightCurlyBracket:
case TYPE.RightParenthesis:
case TYPE.RightSquareBracket:
if (token.balance > token.index || token.balance < startIdx) {
break scan;
}
break;
}
length++;
// until balance closing
if (token.balance <= startIdx) {
break;
}
} while (token = getNextToken(length));
return length;
}
// =========================
// Dimensions
//
function dimension(type) {
return function(token, getNextToken, opts) {
if (token === null || token.type !== TYPE.Dimension) {
return 0;
}
var numberEnd = consumeNumber(token.value, 0);
// check unit
if (type !== null) {
// check for IE postfix hack, i.e. 123px\0 or 123px\9
var reverseSolidusOffset = token.value.indexOf('\\', numberEnd);
var unit = reverseSolidusOffset === -1 || !isPostfixIeHack(token.value, reverseSolidusOffset)
? token.value.substr(numberEnd)
: token.value.substring(numberEnd, reverseSolidusOffset);
if (type.hasOwnProperty(unit.toLowerCase()) === false) {
return 0;
}
}
// check range if specified
if (outOfRange(opts, token.value, numberEnd)) {
return 0;
}
return 1;
};
}
// =========================
// Percentage
//
// §5.5. Percentages: the <percentage> type
// https://drafts.csswg.org/css-values-4/#percentages
function percentage(token, getNextToken, opts) {
// ... corresponds to the <percentage-token> production
if (token === null || token.type !== TYPE.Percentage) {
return 0;
}
// check range if specified
if (outOfRange(opts, token.value, token.value.length - 1)) {
return 0;
}
return 1;
}
// =========================
// Numeric
//
// https://drafts.csswg.org/css-values-4/#numbers
// The value <zero> represents a literal number with the value 0. Expressions that merely
// evaluate to a <number> with the value 0 (for example, calc(0)) do not match <zero>;
// only literal <number-token>s do.
function zero(next) {
if (typeof next !== 'function') {
next = function() {
return 0;
};
}
return function(token, getNextToken, opts) {
if (token !== null && token.type === TYPE.Number) {
if (Number(token.value) === 0) {
return 1;
}
}
return next(token, getNextToken, opts);
};
}
// § 5.3. Real Numbers: the <number> type
// https://drafts.csswg.org/css-values-4/#numbers
// Number values are denoted by <number>, and represent real numbers, possibly with a fractional component.
// ... It corresponds to the <number-token> production
function number(token, getNextToken, opts) {
if (token === null) {
return 0;
}
var numberEnd = consumeNumber(token.value, 0);
var isNumber = numberEnd === token.value.length;
if (!isNumber && !isPostfixIeHack(token.value, numberEnd)) {
return 0;
}
// check range if specified
if (outOfRange(opts, token.value, numberEnd)) {
return 0;
}
return 1;
}
// §5.2. Integers: the <integer> type
// https://drafts.csswg.org/css-values-4/#integers
function integer(token, getNextToken, opts) {
// ... corresponds to a subset of the <number-token> production
if (token === null || token.type !== TYPE.Number) {
return 0;
}
// The first digit of an integer may be immediately preceded by `-` or `+` to indicate the integer’s sign.
var i = token.value.charCodeAt(0) === 0x002B || // U+002B PLUS SIGN (+)
token.value.charCodeAt(0) === 0x002D ? 1 : 0; // U+002D HYPHEN-MINUS (-)
// When written literally, an integer is one or more decimal digits 0 through 9 ...
for (; i < token.value.length; i++) {
if (!isDigit(token.value.charCodeAt(i))) {
return 0;
}
}
// check range if specified
if (outOfRange(opts, token.value, i)) {
return 0;
}
return 1;
}
module.exports = {
// token types
'ident-token': tokenType(TYPE.Ident),
'function-token': tokenType(TYPE.Function),
'at-keyword-token': tokenType(TYPE.AtKeyword),
'hash-token': tokenType(TYPE.Hash),
'string-token': tokenType(TYPE.String),
'bad-string-token': tokenType(TYPE.BadString),
'url-token': tokenType(TYPE.Url),
'bad-url-token': tokenType(TYPE.BadUrl),
'delim-token': tokenType(TYPE.Delim),
'number-token': tokenType(TYPE.Number),
'percentage-token': tokenType(TYPE.Percentage),
'dimension-token': tokenType(TYPE.Dimension),
'whitespace-token': tokenType(TYPE.WhiteSpace),
'CDO-token': tokenType(TYPE.CDO),
'CDC-token': tokenType(TYPE.CDC),
'colon-token': tokenType(TYPE.Colon),
'semicolon-token': tokenType(TYPE.Semicolon),
'comma-token': tokenType(TYPE.Comma),
'[-token': tokenType(TYPE.LeftSquareBracket),
']-token': tokenType(TYPE.RightSquareBracket),
'(-token': tokenType(TYPE.LeftParenthesis),
')-token': tokenType(TYPE.RightParenthesis),
'{-token': tokenType(TYPE.LeftCurlyBracket),
'}-token': tokenType(TYPE.RightCurlyBracket),
// token type aliases
'string': tokenType(TYPE.String),
'ident': tokenType(TYPE.Ident),
// complex types
'custom-ident': customIdent,
'custom-property-name': customPropertyName,
'hex-color': hexColor,
'id-selector': idSelector, // element( <id-selector> )
'an-plus-b': anPlusB,
'urange': urange,
'declaration-value': declarationValue,
'any-value': anyValue,
// dimensions
'dimension': calc(dimension(null)),
'angle': calc(dimension(ANGLE)),
'decibel': calc(dimension(DECIBEL)),
'frequency': calc(dimension(FREQUENCY)),
'flex': calc(dimension(FLEX)),
'length': calc(zero(dimension(LENGTH))),
'resolution': calc(dimension(RESOLUTION)),
'semitones': calc(dimension(SEMITONES)),
'time': calc(dimension(TIME)),
// percentage
'percentage': calc(percentage),
// numeric
'zero': zero(),
'number': calc(number),
'integer': calc(integer),
// old IE stuff
'-ms-legacy-expression': func('expression')
};

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module.exports = {
Lexer: require('./Lexer')
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/lexer/match-graph.js generated vendored Normal file
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var parse = require('../definition-syntax/parse');
var MATCH = { type: 'Match' };
var MISMATCH = { type: 'Mismatch' };
var DISALLOW_EMPTY = { type: 'DisallowEmpty' };
var LEFTPARENTHESIS = 40; // (
var RIGHTPARENTHESIS = 41; // )
function createCondition(match, thenBranch, elseBranch) {
// reduce node count
if (thenBranch === MATCH && elseBranch === MISMATCH) {
return match;
}
if (match === MATCH && thenBranch === MATCH && elseBranch === MATCH) {
return match;
}
if (match.type === 'If' && match.else === MISMATCH && thenBranch === MATCH) {
thenBranch = match.then;
match = match.match;
}
return {
type: 'If',
match: match,
then: thenBranch,
else: elseBranch
};
}
function isFunctionType(name) {
return (
name.length > 2 &&
name.charCodeAt(name.length - 2) === LEFTPARENTHESIS &&
name.charCodeAt(name.length - 1) === RIGHTPARENTHESIS
);
}
function isEnumCapatible(term) {
return (
term.type === 'Keyword' ||
term.type === 'AtKeyword' ||
term.type === 'Function' ||
term.type === 'Type' && isFunctionType(term.name)
);
}
function buildGroupMatchGraph(combinator, terms, atLeastOneTermMatched) {
switch (combinator) {
case ' ':
// Juxtaposing components means that all of them must occur, in the given order.
//
// a b c
// =
// match a
// then match b
// then match c
// then MATCH
// else MISMATCH
// else MISMATCH
// else MISMATCH
var result = MATCH;
for (var i = terms.length - 1; i >= 0; i--) {
var term = terms[i];
result = createCondition(
term,
result,
MISMATCH
);
};
return result;
case '|':
// A bar (|) separates two or more alternatives: exactly one of them must occur.
//
// a | b | c
// =
// match a
// then MATCH
// else match b
// then MATCH
// else match c
// then MATCH
// else MISMATCH
var result = MISMATCH;
var map = null;
for (var i = terms.length - 1; i >= 0; i--) {
var term = terms[i];
// reduce sequence of keywords into a Enum
if (isEnumCapatible(term)) {
if (map === null && i > 0 && isEnumCapatible(terms[i - 1])) {
map = Object.create(null);
result = createCondition(
{
type: 'Enum',
map: map
},
MATCH,
result
);
}
if (map !== null) {
var key = (isFunctionType(term.name) ? term.name.slice(0, -1) : term.name).toLowerCase();
if (key in map === false) {
map[key] = term;
continue;
}
}
}
map = null;
// create a new conditonal node
result = createCondition(
term,
MATCH,
result
);
};
return result;
case '&&':
// A double ampersand (&&) separates two or more components,
// all of which must occur, in any order.
// Use MatchOnce for groups with a large number of terms,
// since &&-groups produces at least N!-node trees
if (terms.length > 5) {
return {
type: 'MatchOnce',
terms: terms,
all: true
};
}
// Use a combination tree for groups with small number of terms
//
// a && b && c
// =
// match a
// then [b && c]
// else match b
// then [a && c]
// else match c
// then [a && b]
// else MISMATCH
//
// a && b
// =
// match a
// then match b
// then MATCH
// else MISMATCH
// else match b
// then match a
// then MATCH
// else MISMATCH
// else MISMATCH
var result = MISMATCH;
for (var i = terms.length - 1; i >= 0; i--) {
var term = terms[i];
var thenClause;
if (terms.length > 1) {
thenClause = buildGroupMatchGraph(
combinator,
terms.filter(function(newGroupTerm) {
return newGroupTerm !== term;
}),
false
);
} else {
thenClause = MATCH;
}
result = createCondition(
term,
thenClause,
result
);
};
return result;
case '||':
// A double bar (||) separates two or more options:
// one or more of them must occur, in any order.
// Use MatchOnce for groups with a large number of terms,
// since ||-groups produces at least N!-node trees
if (terms.length > 5) {
return {
type: 'MatchOnce',
terms: terms,
all: false
};
}
// Use a combination tree for groups with small number of terms
//
// a || b || c
// =
// match a
// then [b || c]
// else match b
// then [a || c]
// else match c
// then [a || b]
// else MISMATCH
//
// a || b
// =
// match a
// then match b
// then MATCH
// else MATCH
// else match b
// then match a
// then MATCH
// else MATCH
// else MISMATCH
var result = atLeastOneTermMatched ? MATCH : MISMATCH;
for (var i = terms.length - 1; i >= 0; i--) {
var term = terms[i];
var thenClause;
if (terms.length > 1) {
thenClause = buildGroupMatchGraph(
combinator,
terms.filter(function(newGroupTerm) {
return newGroupTerm !== term;
}),
true
);
} else {
thenClause = MATCH;
}
result = createCondition(
term,
thenClause,
result
);
};
return result;
}
}
function buildMultiplierMatchGraph(node) {
var result = MATCH;
var matchTerm = buildMatchGraph(node.term);
if (node.max === 0) {
// disable repeating of empty match to prevent infinite loop
matchTerm = createCondition(
matchTerm,
DISALLOW_EMPTY,
MISMATCH
);
// an occurrence count is not limited, make a cycle;
// to collect more terms on each following matching mismatch
result = createCondition(
matchTerm,
null, // will be a loop
MISMATCH
);
result.then = createCondition(
MATCH,
MATCH,
result // make a loop
);
if (node.comma) {
result.then.else = createCondition(
{ type: 'Comma', syntax: node },
result,
MISMATCH
);
}
} else {
// create a match node chain for [min .. max] interval with optional matches
for (var i = node.min || 1; i <= node.max; i++) {
if (node.comma && result !== MATCH) {
result = createCondition(
{ type: 'Comma', syntax: node },
result,
MISMATCH
);
}
result = createCondition(
matchTerm,
createCondition(
MATCH,
MATCH,
result
),
MISMATCH
);
}
}
if (node.min === 0) {
// allow zero match
result = createCondition(
MATCH,
MATCH,
result
);
} else {
// create a match node chain to collect [0 ... min - 1] required matches
for (var i = 0; i < node.min - 1; i++) {
if (node.comma && result !== MATCH) {
result = createCondition(
{ type: 'Comma', syntax: node },
result,
MISMATCH
);
}
result = createCondition(
matchTerm,
result,
MISMATCH
);
}
}
return result;
}
function buildMatchGraph(node) {
if (typeof node === 'function') {
return {
type: 'Generic',
fn: node
};
}
switch (node.type) {
case 'Group':
var result = buildGroupMatchGraph(
node.combinator,
node.terms.map(buildMatchGraph),
false
);
if (node.disallowEmpty) {
result = createCondition(
result,
DISALLOW_EMPTY,
MISMATCH
);
}
return result;
case 'Multiplier':
return buildMultiplierMatchGraph(node);
case 'Type':
case 'Property':
return {
type: node.type,
name: node.name,
syntax: node
};
case 'Keyword':
return {
type: node.type,
name: node.name.toLowerCase(),
syntax: node
};
case 'AtKeyword':
return {
type: node.type,
name: '@' + node.name.toLowerCase(),
syntax: node
};
case 'Function':
return {
type: node.type,
name: node.name.toLowerCase() + '(',
syntax: node
};
case 'String':
// convert a one char length String to a Token
if (node.value.length === 3) {
return {
type: 'Token',
value: node.value.charAt(1),
syntax: node
};
}
// otherwise use it as is
return {
type: node.type,
value: node.value.substr(1, node.value.length - 2).replace(/\\'/g, '\''),
syntax: node
};
case 'Token':
return {
type: node.type,
value: node.value,
syntax: node
};
case 'Comma':
return {
type: node.type,
syntax: node
};
default:
throw new Error('Unknown node type:', node.type);
}
}
module.exports = {
MATCH: MATCH,
MISMATCH: MISMATCH,
DISALLOW_EMPTY: DISALLOW_EMPTY,
buildMatchGraph: function(syntaxTree, ref) {
if (typeof syntaxTree === 'string') {
syntaxTree = parse(syntaxTree);
}
return {
type: 'MatchGraph',
match: buildMatchGraph(syntaxTree),
syntax: ref || null,
source: syntaxTree
};
}
};

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var hasOwnProperty = Object.prototype.hasOwnProperty;
var matchGraph = require('./match-graph');
var MATCH = matchGraph.MATCH;
var MISMATCH = matchGraph.MISMATCH;
var DISALLOW_EMPTY = matchGraph.DISALLOW_EMPTY;
var TYPE = require('../tokenizer/const').TYPE;
var STUB = 0;
var TOKEN = 1;
var OPEN_SYNTAX = 2;
var CLOSE_SYNTAX = 3;
var EXIT_REASON_MATCH = 'Match';
var EXIT_REASON_MISMATCH = 'Mismatch';
var EXIT_REASON_ITERATION_LIMIT = 'Maximum iteration number exceeded (please fill an issue on https://github.com/csstree/csstree/issues)';
var ITERATION_LIMIT = 15000;
var totalIterationCount = 0;
function reverseList(list) {
var prev = null;
var next = null;
var item = list;
while (item !== null) {
next = item.prev;
item.prev = prev;
prev = item;
item = next;
}
return prev;
}
function areStringsEqualCaseInsensitive(testStr, referenceStr) {
if (testStr.length !== referenceStr.length) {
return false;
}
for (var i = 0; i < testStr.length; i++) {
var testCode = testStr.charCodeAt(i);
var referenceCode = referenceStr.charCodeAt(i);
// testCode.toLowerCase() for U+0041 LATIN CAPITAL LETTER A (A) .. U+005A LATIN CAPITAL LETTER Z (Z).
if (testCode >= 0x0041 && testCode <= 0x005A) {
testCode = testCode | 32;
}
if (testCode !== referenceCode) {
return false;
}
}
return true;
}
function isContextEdgeDelim(token) {
if (token.type !== TYPE.Delim) {
return false;
}
// Fix matching for unicode-range: U+30??, U+FF00-FF9F
// Probably we need to check out previous match instead
return token.value !== '?';
}
function isCommaContextStart(token) {
if (token === null) {
return true;
}
return (
token.type === TYPE.Comma ||
token.type === TYPE.Function ||
token.type === TYPE.LeftParenthesis ||
token.type === TYPE.LeftSquareBracket ||
token.type === TYPE.LeftCurlyBracket ||
isContextEdgeDelim(token)
);
}
function isCommaContextEnd(token) {
if (token === null) {
return true;
}
return (
token.type === TYPE.RightParenthesis ||
token.type === TYPE.RightSquareBracket ||
token.type === TYPE.RightCurlyBracket ||
token.type === TYPE.Delim
);
}
function internalMatch(tokens, state, syntaxes) {
function moveToNextToken() {
do {
tokenIndex++;
token = tokenIndex < tokens.length ? tokens[tokenIndex] : null;
} while (token !== null && (token.type === TYPE.WhiteSpace || token.type === TYPE.Comment));
}
function getNextToken(offset) {
var nextIndex = tokenIndex + offset;
return nextIndex < tokens.length ? tokens[nextIndex] : null;
}
function stateSnapshotFromSyntax(nextState, prev) {
return {
nextState: nextState,
matchStack: matchStack,
syntaxStack: syntaxStack,
thenStack: thenStack,
tokenIndex: tokenIndex,
prev: prev
};
}
function pushThenStack(nextState) {
thenStack = {
nextState: nextState,
matchStack: matchStack,
syntaxStack: syntaxStack,
prev: thenStack
};
}
function pushElseStack(nextState) {
elseStack = stateSnapshotFromSyntax(nextState, elseStack);
}
function addTokenToMatch() {
matchStack = {
type: TOKEN,
syntax: state.syntax,
token: token,
prev: matchStack
};
moveToNextToken();
syntaxStash = null;
if (tokenIndex > longestMatch) {
longestMatch = tokenIndex;
}
}
function openSyntax() {
syntaxStack = {
syntax: state.syntax,
opts: state.syntax.opts || (syntaxStack !== null && syntaxStack.opts) || null,
prev: syntaxStack
};
matchStack = {
type: OPEN_SYNTAX,
syntax: state.syntax,
token: matchStack.token,
prev: matchStack
};
}
function closeSyntax() {
if (matchStack.type === OPEN_SYNTAX) {
matchStack = matchStack.prev;
} else {
matchStack = {
type: CLOSE_SYNTAX,
syntax: syntaxStack.syntax,
token: matchStack.token,
prev: matchStack
};
}
syntaxStack = syntaxStack.prev;
}
var syntaxStack = null;
var thenStack = null;
var elseStack = null;
// null – stashing allowed, nothing stashed
// false – stashing disabled, nothing stashed
// anithing else – fail stashable syntaxes, some syntax stashed
var syntaxStash = null;
var iterationCount = 0; // count iterations and prevent infinite loop
var exitReason = null;
var token = null;
var tokenIndex = -1;
var longestMatch = 0;
var matchStack = {
type: STUB,
syntax: null,
token: null,
prev: null
};
moveToNextToken();
while (exitReason === null && ++iterationCount < ITERATION_LIMIT) {
// function mapList(list, fn) {
// var result = [];
// while (list) {
// result.unshift(fn(list));
// list = list.prev;
// }
// return result;
// }
// console.log('--\n',
// '#' + iterationCount,
// require('util').inspect({
// match: mapList(matchStack, x => x.type === TOKEN ? x.token && x.token.value : x.syntax ? ({ [OPEN_SYNTAX]: '<', [CLOSE_SYNTAX]: '</' }[x.type] || x.type) + '!' + x.syntax.name : null),
// token: token && token.value,
// tokenIndex,
// syntax: syntax.type + (syntax.id ? ' #' + syntax.id : '')
// }, { depth: null })
// );
switch (state.type) {
case 'Match':
if (thenStack === null) {
// turn to MISMATCH when some tokens left unmatched
if (token !== null) {
// doesn't mismatch if just one token left and it's an IE hack
if (tokenIndex !== tokens.length - 1 || (token.value !== '\\0' && token.value !== '\\9')) {
state = MISMATCH;
break;
}
}
// break the main loop, return a result - MATCH
exitReason = EXIT_REASON_MATCH;
break;
}
// go to next syntax (`then` branch)
state = thenStack.nextState;
// check match is not empty
if (state === DISALLOW_EMPTY) {
if (thenStack.matchStack === matchStack) {
state = MISMATCH;
break;
} else {
state = MATCH;
}
}
// close syntax if needed
while (thenStack.syntaxStack !== syntaxStack) {
closeSyntax();
}
// pop stack
thenStack = thenStack.prev;
break;
case 'Mismatch':
// when some syntax is stashed
if (syntaxStash !== null && syntaxStash !== false) {
// there is no else branches or a branch reduce match stack
if (elseStack === null || tokenIndex > elseStack.tokenIndex) {
// restore state from the stash
elseStack = syntaxStash;
syntaxStash = false; // disable stashing
}
} else if (elseStack === null) {
// no else branches -> break the main loop
// return a result - MISMATCH
exitReason = EXIT_REASON_MISMATCH;
break;
}
// go to next syntax (`else` branch)
state = elseStack.nextState;
// restore all the rest stack states
thenStack = elseStack.thenStack;
syntaxStack = elseStack.syntaxStack;
matchStack = elseStack.matchStack;
tokenIndex = elseStack.tokenIndex;
token = tokenIndex < tokens.length ? tokens[tokenIndex] : null;
// pop stack
elseStack = elseStack.prev;
break;
case 'MatchGraph':
state = state.match;
break;
case 'If':
// IMPORTANT: else stack push must go first,
// since it stores the state of thenStack before changes
if (state.else !== MISMATCH) {
pushElseStack(state.else);
}
if (state.then !== MATCH) {
pushThenStack(state.then);
}
state = state.match;
break;
case 'MatchOnce':
state = {
type: 'MatchOnceBuffer',
syntax: state,
index: 0,
mask: 0
};
break;
case 'MatchOnceBuffer':
var terms = state.syntax.terms;
if (state.index === terms.length) {
// no matches at all or it's required all terms to be matched
if (state.mask === 0 || state.syntax.all) {
state = MISMATCH;
break;
}
// a partial match is ok
state = MATCH;
break;
}
// all terms are matched
if (state.mask === (1 << terms.length) - 1) {
state = MATCH;
break;
}
for (; state.index < terms.length; state.index++) {
var matchFlag = 1 << state.index;
if ((state.mask & matchFlag) === 0) {
// IMPORTANT: else stack push must go first,
// since it stores the state of thenStack before changes
pushElseStack(state);
pushThenStack({
type: 'AddMatchOnce',
syntax: state.syntax,
mask: state.mask | matchFlag
});
// match
state = terms[state.index++];
break;
}
}
break;
case 'AddMatchOnce':
state = {
type: 'MatchOnceBuffer',
syntax: state.syntax,
index: 0,
mask: state.mask
};
break;
case 'Enum':
if (token !== null) {
var name = token.value.toLowerCase();
// drop \0 and \9 hack from keyword name
if (name.indexOf('\\') !== -1) {
name = name.replace(/\\[09].*$/, '');
}
if (hasOwnProperty.call(state.map, name)) {
state = state.map[name];
break;
}
}
state = MISMATCH;
break;
case 'Generic':
var opts = syntaxStack !== null ? syntaxStack.opts : null;
var lastTokenIndex = tokenIndex + Math.floor(state.fn(token, getNextToken, opts));
if (!isNaN(lastTokenIndex) && lastTokenIndex > tokenIndex) {
while (tokenIndex < lastTokenIndex) {
addTokenToMatch();
}
state = MATCH;
} else {
state = MISMATCH;
}
break;
case 'Type':
case 'Property':
var syntaxDict = state.type === 'Type' ? 'types' : 'properties';
var dictSyntax = hasOwnProperty.call(syntaxes, syntaxDict) ? syntaxes[syntaxDict][state.name] : null;
if (!dictSyntax || !dictSyntax.match) {
throw new Error(
'Bad syntax reference: ' +
(state.type === 'Type'
? '<' + state.name + '>'
: '<\'' + state.name + '\'>')
);
}
// stash a syntax for types with low priority
if (syntaxStash !== false && token !== null && state.type === 'Type') {
var lowPriorityMatching =
// https://drafts.csswg.org/css-values-4/#custom-idents
// When parsing positionally-ambiguous keywords in a property value, a <custom-ident> production
// can only claim the keyword if no other unfulfilled production can claim it.
(state.name === 'custom-ident' && token.type === TYPE.Ident) ||
// https://drafts.csswg.org/css-values-4/#lengths
// ... if a `0` could be parsed as either a <number> or a <length> in a property (such as line-height),
// it must parse as a <number>
(state.name === 'length' && token.value === '0');
if (lowPriorityMatching) {
if (syntaxStash === null) {
syntaxStash = stateSnapshotFromSyntax(state, elseStack);
}
state = MISMATCH;
break;
}
}
openSyntax();
state = dictSyntax.match;
break;
case 'Keyword':
var name = state.name;
if (token !== null) {
var keywordName = token.value;
// drop \0 and \9 hack from keyword name
if (keywordName.indexOf('\\') !== -1) {
keywordName = keywordName.replace(/\\[09].*$/, '');
}
if (areStringsEqualCaseInsensitive(keywordName, name)) {
addTokenToMatch();
state = MATCH;
break;
}
}
state = MISMATCH;
break;
case 'AtKeyword':
case 'Function':
if (token !== null && areStringsEqualCaseInsensitive(token.value, state.name)) {
addTokenToMatch();
state = MATCH;
break;
}
state = MISMATCH;
break;
case 'Token':
if (token !== null && token.value === state.value) {
addTokenToMatch();
state = MATCH;
break;
}
state = MISMATCH;
break;
case 'Comma':
if (token !== null && token.type === TYPE.Comma) {
if (isCommaContextStart(matchStack.token)) {
state = MISMATCH;
} else {
addTokenToMatch();
state = isCommaContextEnd(token) ? MISMATCH : MATCH;
}
} else {
state = isCommaContextStart(matchStack.token) || isCommaContextEnd(token) ? MATCH : MISMATCH;
}
break;
case 'String':
var string = '';
for (var lastTokenIndex = tokenIndex; lastTokenIndex < tokens.length && string.length < state.value.length; lastTokenIndex++) {
string += tokens[lastTokenIndex].value;
}
if (areStringsEqualCaseInsensitive(string, state.value)) {
while (tokenIndex < lastTokenIndex) {
addTokenToMatch();
}
state = MATCH;
} else {
state = MISMATCH;
}
break;
default:
throw new Error('Unknown node type: ' + state.type);
}
}
totalIterationCount += iterationCount;
switch (exitReason) {
case null:
console.warn('[csstree-match] BREAK after ' + ITERATION_LIMIT + ' iterations');
exitReason = EXIT_REASON_ITERATION_LIMIT;
matchStack = null;
break;
case EXIT_REASON_MATCH:
while (syntaxStack !== null) {
closeSyntax();
}
break;
default:
matchStack = null;
}
return {
tokens: tokens,
reason: exitReason,
iterations: iterationCount,
match: matchStack,
longestMatch: longestMatch
};
}
function matchAsList(tokens, matchGraph, syntaxes) {
var matchResult = internalMatch(tokens, matchGraph, syntaxes || {});
if (matchResult.match !== null) {
var item = reverseList(matchResult.match).prev;
matchResult.match = [];
while (item !== null) {
switch (item.type) {
case STUB:
break;
case OPEN_SYNTAX:
case CLOSE_SYNTAX:
matchResult.match.push({
type: item.type,
syntax: item.syntax
});
break;
default:
matchResult.match.push({
token: item.token.value,
node: item.token.node
});
break;
}
item = item.prev;
}
}
return matchResult;
}
function matchAsTree(tokens, matchGraph, syntaxes) {
var matchResult = internalMatch(tokens, matchGraph, syntaxes || {});
if (matchResult.match === null) {
return matchResult;
}
var item = matchResult.match;
var host = matchResult.match = {
syntax: matchGraph.syntax || null,
match: []
};
var hostStack = [host];
// revert a list and start with 2nd item since 1st is a stub item
item = reverseList(item).prev;
// build a tree
while (item !== null) {
switch (item.type) {
case OPEN_SYNTAX:
host.match.push(host = {
syntax: item.syntax,
match: []
});
hostStack.push(host);
break;
case CLOSE_SYNTAX:
hostStack.pop();
host = hostStack[hostStack.length - 1];
break;
default:
host.match.push({
syntax: item.syntax || null,
token: item.token.value,
node: item.token.node
});
}
item = item.prev;
}
return matchResult;
}
module.exports = {
matchAsList: matchAsList,
matchAsTree: matchAsTree,
getTotalIterationCount: function() {
return totalIterationCount;
}
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/lexer/prepare-tokens.js generated vendored Normal file
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var tokenize = require('../tokenizer');
var TokenStream = require('../common/TokenStream');
var tokenStream = new TokenStream();
var astToTokens = {
decorator: function(handlers) {
var curNode = null;
var prev = { len: 0, node: null };
var nodes = [prev];
var buffer = '';
return {
children: handlers.children,
node: function(node) {
var tmp = curNode;
curNode = node;
handlers.node.call(this, node);
curNode = tmp;
},
chunk: function(chunk) {
buffer += chunk;
if (prev.node !== curNode) {
nodes.push({
len: chunk.length,
node: curNode
});
} else {
prev.len += chunk.length;
}
},
result: function() {
return prepareTokens(buffer, nodes);
}
};
}
};
function prepareTokens(str, nodes) {
var tokens = [];
var nodesOffset = 0;
var nodesIndex = 0;
var currentNode = nodes ? nodes[nodesIndex].node : null;
tokenize(str, tokenStream);
while (!tokenStream.eof) {
if (nodes) {
while (nodesIndex < nodes.length && nodesOffset + nodes[nodesIndex].len <= tokenStream.tokenStart) {
nodesOffset += nodes[nodesIndex++].len;
currentNode = nodes[nodesIndex].node;
}
}
tokens.push({
type: tokenStream.tokenType,
value: tokenStream.getTokenValue(),
index: tokenStream.tokenIndex, // TODO: remove it, temporary solution
balance: tokenStream.balance[tokenStream.tokenIndex], // TODO: remove it, temporary solution
node: currentNode
});
tokenStream.next();
// console.log({ ...tokens[tokens.length - 1], node: undefined });
}
return tokens;
}
module.exports = function(value, syntax) {
if (typeof value === 'string') {
return prepareTokens(value, null);
}
return syntax.generate(value, astToTokens);
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/lexer/search.js generated vendored Normal file
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var List = require('../common/List');
function getFirstMatchNode(matchNode) {
if ('node' in matchNode) {
return matchNode.node;
}
return getFirstMatchNode(matchNode.match[0]);
}
function getLastMatchNode(matchNode) {
if ('node' in matchNode) {
return matchNode.node;
}
return getLastMatchNode(matchNode.match[matchNode.match.length - 1]);
}
function matchFragments(lexer, ast, match, type, name) {
function findFragments(matchNode) {
if (matchNode.syntax !== null &&
matchNode.syntax.type === type &&
matchNode.syntax.name === name) {
var start = getFirstMatchNode(matchNode);
var end = getLastMatchNode(matchNode);
lexer.syntax.walk(ast, function(node, item, list) {
if (node === start) {
var nodes = new List();
do {
nodes.appendData(item.data);
if (item.data === end) {
break;
}
item = item.next;
} while (item !== null);
fragments.push({
parent: list,
nodes: nodes
});
}
});
}
if (Array.isArray(matchNode.match)) {
matchNode.match.forEach(findFragments);
}
}
var fragments = [];
if (match.matched !== null) {
findFragments(match.matched);
}
return fragments;
}
module.exports = {
matchFragments: matchFragments
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/lexer/structure.js generated vendored Normal file
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var List = require('../common/List');
var hasOwnProperty = Object.prototype.hasOwnProperty;
function isValidNumber(value) {
// Number.isInteger(value) && value >= 0
return (
typeof value === 'number' &&
isFinite(value) &&
Math.floor(value) === value &&
value >= 0
);
}
function isValidLocation(loc) {
return (
Boolean(loc) &&
isValidNumber(loc.offset) &&
isValidNumber(loc.line) &&
isValidNumber(loc.column)
);
}
function createNodeStructureChecker(type, fields) {
return function checkNode(node, warn) {
if (!node || node.constructor !== Object) {
return warn(node, 'Type of node should be an Object');
}
for (var key in node) {
var valid = true;
if (hasOwnProperty.call(node, key) === false) {
continue;
}
if (key === 'type') {
if (node.type !== type) {
warn(node, 'Wrong node type `' + node.type + '`, expected `' + type + '`');
}
} else if (key === 'loc') {
if (node.loc === null) {
continue;
} else if (node.loc && node.loc.constructor === Object) {
if (typeof node.loc.source !== 'string') {
key += '.source';
} else if (!isValidLocation(node.loc.start)) {
key += '.start';
} else if (!isValidLocation(node.loc.end)) {
key += '.end';
} else {
continue;
}
}
valid = false;
} else if (fields.hasOwnProperty(key)) {
for (var i = 0, valid = false; !valid && i < fields[key].length; i++) {
var fieldType = fields[key][i];
switch (fieldType) {
case String:
valid = typeof node[key] === 'string';
break;
case Boolean:
valid = typeof node[key] === 'boolean';
break;
case null:
valid = node[key] === null;
break;
default:
if (typeof fieldType === 'string') {
valid = node[key] && node[key].type === fieldType;
} else if (Array.isArray(fieldType)) {
valid = node[key] instanceof List;
}
}
}
} else {
warn(node, 'Unknown field `' + key + '` for ' + type + ' node type');
}
if (!valid) {
warn(node, 'Bad value for `' + type + '.' + key + '`');
}
}
for (var key in fields) {
if (hasOwnProperty.call(fields, key) &&
hasOwnProperty.call(node, key) === false) {
warn(node, 'Field `' + type + '.' + key + '` is missed');
}
}
};
}
function processStructure(name, nodeType) {
var structure = nodeType.structure;
var fields = {
type: String,
loc: true
};
var docs = {
type: '"' + name + '"'
};
for (var key in structure) {
if (hasOwnProperty.call(structure, key) === false) {
continue;
}
var docsTypes = [];
var fieldTypes = fields[key] = Array.isArray(structure[key])
? structure[key].slice()
: [structure[key]];
for (var i = 0; i < fieldTypes.length; i++) {
var fieldType = fieldTypes[i];
if (fieldType === String || fieldType === Boolean) {
docsTypes.push(fieldType.name);
} else if (fieldType === null) {
docsTypes.push('null');
} else if (typeof fieldType === 'string') {
docsTypes.push('<' + fieldType + '>');
} else if (Array.isArray(fieldType)) {
docsTypes.push('List'); // TODO: use type enum
} else {
throw new Error('Wrong value `' + fieldType + '` in `' + name + '.' + key + '` structure definition');
}
}
docs[key] = docsTypes.join(' | ');
}
return {
docs: docs,
check: createNodeStructureChecker(name, fields)
};
}
module.exports = {
getStructureFromConfig: function(config) {
var structure = {};
if (config.node) {
for (var name in config.node) {
if (hasOwnProperty.call(config.node, name)) {
var nodeType = config.node[name];
if (nodeType.structure) {
structure[name] = processStructure(name, nodeType);
} else {
throw new Error('Missed `structure` field in `' + name + '` node type definition');
}
}
}
}
return structure;
}
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/lexer/trace.js generated vendored Normal file
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function getTrace(node) {
function shouldPutToTrace(syntax) {
if (syntax === null) {
return false;
}
return (
syntax.type === 'Type' ||
syntax.type === 'Property' ||
syntax.type === 'Keyword'
);
}
function hasMatch(matchNode) {
if (Array.isArray(matchNode.match)) {
// use for-loop for better perfomance
for (var i = 0; i < matchNode.match.length; i++) {
if (hasMatch(matchNode.match[i])) {
if (shouldPutToTrace(matchNode.syntax)) {
result.unshift(matchNode.syntax);
}
return true;
}
}
} else if (matchNode.node === node) {
result = shouldPutToTrace(matchNode.syntax)
? [matchNode.syntax]
: [];
return true;
}
return false;
}
var result = null;
if (this.matched !== null) {
hasMatch(this.matched);
}
return result;
}
function testNode(match, node, fn) {
var trace = getTrace.call(match, node);
if (trace === null) {
return false;
}
return trace.some(fn);
}
function isType(node, type) {
return testNode(this, node, function(matchNode) {
return matchNode.type === 'Type' && matchNode.name === type;
});
}
function isProperty(node, property) {
return testNode(this, node, function(matchNode) {
return matchNode.type === 'Property' && matchNode.name === property;
});
}
function isKeyword(node) {
return testNode(this, node, function(matchNode) {
return matchNode.type === 'Keyword';
});
}
module.exports = {
getTrace: getTrace,
isType: isType,
isProperty: isProperty,
isKeyword: isKeyword
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/parser/create.js generated vendored Normal file
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var OffsetToLocation = require('../common/OffsetToLocation');
var SyntaxError = require('../common/SyntaxError');
var TokenStream = require('../common/TokenStream');
var List = require('../common/List');
var tokenize = require('../tokenizer');
var constants = require('../tokenizer/const');
var { findWhiteSpaceStart, cmpStr } = require('../tokenizer/utils');
var sequence = require('./sequence');
var noop = function() {};
var TYPE = constants.TYPE;
var NAME = constants.NAME;
var WHITESPACE = TYPE.WhiteSpace;
var COMMENT = TYPE.Comment;
var IDENT = TYPE.Ident;
var FUNCTION = TYPE.Function;
var URL = TYPE.Url;
var HASH = TYPE.Hash;
var PERCENTAGE = TYPE.Percentage;
var NUMBER = TYPE.Number;
var NUMBERSIGN = 0x0023; // U+0023 NUMBER SIGN (#)
var NULL = 0;
function createParseContext(name) {
return function() {
return this[name]();
};
}
function processConfig(config) {
var parserConfig = {
context: {},
scope: {},
atrule: {},
pseudo: {}
};
if (config.parseContext) {
for (var name in config.parseContext) {
switch (typeof config.parseContext[name]) {
case 'function':
parserConfig.context[name] = config.parseContext[name];
break;
case 'string':
parserConfig.context[name] = createParseContext(config.parseContext[name]);
break;
}
}
}
if (config.scope) {
for (var name in config.scope) {
parserConfig.scope[name] = config.scope[name];
}
}
if (config.atrule) {
for (var name in config.atrule) {
var atrule = config.atrule[name];
if (atrule.parse) {
parserConfig.atrule[name] = atrule.parse;
}
}
}
if (config.pseudo) {
for (var name in config.pseudo) {
var pseudo = config.pseudo[name];
if (pseudo.parse) {
parserConfig.pseudo[name] = pseudo.parse;
}
}
}
if (config.node) {
for (var name in config.node) {
parserConfig[name] = config.node[name].parse;
}
}
return parserConfig;
}
module.exports = function createParser(config) {
var parser = {
scanner: new TokenStream(),
locationMap: new OffsetToLocation(),
filename: '<unknown>',
needPositions: false,
onParseError: noop,
onParseErrorThrow: false,
parseAtrulePrelude: true,
parseRulePrelude: true,
parseValue: true,
parseCustomProperty: false,
readSequence: sequence,
createList: function() {
return new List();
},
createSingleNodeList: function(node) {
return new List().appendData(node);
},
getFirstListNode: function(list) {
return list && list.first();
},
getLastListNode: function(list) {
return list.last();
},
parseWithFallback: function(consumer, fallback) {
var startToken = this.scanner.tokenIndex;
try {
return consumer.call(this);
} catch (e) {
if (this.onParseErrorThrow) {
throw e;
}
var fallbackNode = fallback.call(this, startToken);
this.onParseErrorThrow = true;
this.onParseError(e, fallbackNode);
this.onParseErrorThrow = false;
return fallbackNode;
}
},
lookupNonWSType: function(offset) {
do {
var type = this.scanner.lookupType(offset++);
if (type !== WHITESPACE) {
return type;
}
} while (type !== NULL);
return NULL;
},
eat: function(tokenType) {
if (this.scanner.tokenType !== tokenType) {
var offset = this.scanner.tokenStart;
var message = NAME[tokenType] + ' is expected';
// tweak message and offset
switch (tokenType) {
case IDENT:
// when identifier is expected but there is a function or url
if (this.scanner.tokenType === FUNCTION || this.scanner.tokenType === URL) {
offset = this.scanner.tokenEnd - 1;
message = 'Identifier is expected but function found';
} else {
message = 'Identifier is expected';
}
break;
case HASH:
if (this.scanner.isDelim(NUMBERSIGN)) {
this.scanner.next();
offset++;
message = 'Name is expected';
}
break;
case PERCENTAGE:
if (this.scanner.tokenType === NUMBER) {
offset = this.scanner.tokenEnd;
message = 'Percent sign is expected';
}
break;
default:
// when test type is part of another token show error for current position + 1
// e.g. eat(HYPHENMINUS) will fail on "-foo", but pointing on "-" is odd
if (this.scanner.source.charCodeAt(this.scanner.tokenStart) === tokenType) {
offset = offset + 1;
}
}
this.error(message, offset);
}
this.scanner.next();
},
consume: function(tokenType) {
var value = this.scanner.getTokenValue();
this.eat(tokenType);
return value;
},
consumeFunctionName: function() {
var name = this.scanner.source.substring(this.scanner.tokenStart, this.scanner.tokenEnd - 1);
this.eat(FUNCTION);
return name;
},
getLocation: function(start, end) {
if (this.needPositions) {
return this.locationMap.getLocationRange(
start,
end,
this.filename
);
}
return null;
},
getLocationFromList: function(list) {
if (this.needPositions) {
var head = this.getFirstListNode(list);
var tail = this.getLastListNode(list);
return this.locationMap.getLocationRange(
head !== null ? head.loc.start.offset - this.locationMap.startOffset : this.scanner.tokenStart,
tail !== null ? tail.loc.end.offset - this.locationMap.startOffset : this.scanner.tokenStart,
this.filename
);
}
return null;
},
error: function(message, offset) {
var location = typeof offset !== 'undefined' && offset < this.scanner.source.length
? this.locationMap.getLocation(offset)
: this.scanner.eof
? this.locationMap.getLocation(findWhiteSpaceStart(this.scanner.source, this.scanner.source.length - 1))
: this.locationMap.getLocation(this.scanner.tokenStart);
throw new SyntaxError(
message || 'Unexpected input',
this.scanner.source,
location.offset,
location.line,
location.column
);
}
};
config = processConfig(config || {});
for (var key in config) {
parser[key] = config[key];
}
return function(source, options) {
options = options || {};
var context = options.context || 'default';
var onComment = options.onComment;
var ast;
tokenize(source, parser.scanner);
parser.locationMap.setSource(
source,
options.offset,
options.line,
options.column
);
parser.filename = options.filename || '<unknown>';
parser.needPositions = Boolean(options.positions);
parser.onParseError = typeof options.onParseError === 'function' ? options.onParseError : noop;
parser.onParseErrorThrow = false;
parser.parseAtrulePrelude = 'parseAtrulePrelude' in options ? Boolean(options.parseAtrulePrelude) : true;
parser.parseRulePrelude = 'parseRulePrelude' in options ? Boolean(options.parseRulePrelude) : true;
parser.parseValue = 'parseValue' in options ? Boolean(options.parseValue) : true;
parser.parseCustomProperty = 'parseCustomProperty' in options ? Boolean(options.parseCustomProperty) : false;
if (!parser.context.hasOwnProperty(context)) {
throw new Error('Unknown context `' + context + '`');
}
if (typeof onComment === 'function') {
parser.scanner.forEachToken((type, start, end) => {
if (type === COMMENT) {
const loc = parser.getLocation(start, end);
const value = cmpStr(source, end - 2, end, '*/')
? source.slice(start + 2, end - 2)
: source.slice(start + 2, end);
onComment(value, loc);
}
});
}
ast = parser.context[context].call(parser, options);
if (!parser.scanner.eof) {
parser.error();
}
return ast;
};
};

4
assets_old/node_modules/csso/node_modules/css-tree/lib/parser/index.js generated vendored Normal file
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var createParser = require('./create');
var config = require('../syntax/config/parser');
module.exports = createParser(config);

54
assets_old/node_modules/csso/node_modules/css-tree/lib/parser/sequence.js generated vendored Normal file
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var TYPE = require('../tokenizer').TYPE;
var WHITESPACE = TYPE.WhiteSpace;
var COMMENT = TYPE.Comment;
module.exports = function readSequence(recognizer) {
var children = this.createList();
var child = null;
var context = {
recognizer: recognizer,
space: null,
ignoreWS: false,
ignoreWSAfter: false
};
this.scanner.skipSC();
while (!this.scanner.eof) {
switch (this.scanner.tokenType) {
case COMMENT:
this.scanner.next();
continue;
case WHITESPACE:
if (context.ignoreWS) {
this.scanner.next();
} else {
context.space = this.WhiteSpace();
}
continue;
}
child = recognizer.getNode.call(this, context);
if (child === undefined) {
break;
}
if (context.space !== null) {
children.push(context.space);
context.space = null;
}
children.push(child);
if (context.ignoreWSAfter) {
context.ignoreWSAfter = false;
context.ignoreWS = true;
} else {
context.ignoreWS = false;
}
}
return children;
};

8
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/atrule/font-face.js generated vendored Normal file
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module.exports = {
parse: {
prelude: null,
block: function() {
return this.Block(true);
}
}
};

40
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/atrule/import.js generated vendored Normal file
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var TYPE = require('../../tokenizer').TYPE;
var STRING = TYPE.String;
var IDENT = TYPE.Ident;
var URL = TYPE.Url;
var FUNCTION = TYPE.Function;
var LEFTPARENTHESIS = TYPE.LeftParenthesis;
module.exports = {
parse: {
prelude: function() {
var children = this.createList();
this.scanner.skipSC();
switch (this.scanner.tokenType) {
case STRING:
children.push(this.String());
break;
case URL:
case FUNCTION:
children.push(this.Url());
break;
default:
this.error('String or url() is expected');
}
if (this.lookupNonWSType(0) === IDENT ||
this.lookupNonWSType(0) === LEFTPARENTHESIS) {
children.push(this.WhiteSpace());
children.push(this.MediaQueryList());
}
return children;
},
block: null
}
};

7
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/atrule/index.js generated vendored Normal file
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module.exports = {
'font-face': require('./font-face'),
'import': require('./import'),
'media': require('./media'),
'page': require('./page'),
'supports': require('./supports')
};

12
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/atrule/media.js generated vendored Normal file
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module.exports = {
parse: {
prelude: function() {
return this.createSingleNodeList(
this.MediaQueryList()
);
},
block: function() {
return this.Block(false);
}
}
};

12
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/atrule/page.js generated vendored Normal file
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module.exports = {
parse: {
prelude: function() {
return this.createSingleNodeList(
this.SelectorList()
);
},
block: function() {
return this.Block(true);
}
}
};

89
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/atrule/supports.js generated vendored Normal file
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var TYPE = require('../../tokenizer').TYPE;
var WHITESPACE = TYPE.WhiteSpace;
var COMMENT = TYPE.Comment;
var IDENT = TYPE.Ident;
var FUNCTION = TYPE.Function;
var COLON = TYPE.Colon;
var LEFTPARENTHESIS = TYPE.LeftParenthesis;
function consumeRaw() {
return this.createSingleNodeList(
this.Raw(this.scanner.tokenIndex, null, false)
);
}
function parentheses() {
this.scanner.skipSC();
if (this.scanner.tokenType === IDENT &&
this.lookupNonWSType(1) === COLON) {
return this.createSingleNodeList(
this.Declaration()
);
}
return readSequence.call(this);
}
function readSequence() {
var children = this.createList();
var space = null;
var child;
this.scanner.skipSC();
scan:
while (!this.scanner.eof) {
switch (this.scanner.tokenType) {
case WHITESPACE:
space = this.WhiteSpace();
continue;
case COMMENT:
this.scanner.next();
continue;
case FUNCTION:
child = this.Function(consumeRaw, this.scope.AtrulePrelude);
break;
case IDENT:
child = this.Identifier();
break;
case LEFTPARENTHESIS:
child = this.Parentheses(parentheses, this.scope.AtrulePrelude);
break;
default:
break scan;
}
if (space !== null) {
children.push(space);
space = null;
}
children.push(child);
}
return children;
}
module.exports = {
parse: {
prelude: function() {
var children = readSequence.call(this);
if (this.getFirstListNode(children) === null) {
this.error('Condition is expected');
}
return children;
},
block: function() {
return this.Block(false);
}
}
};

9
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/config/lexer.js generated vendored Normal file
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var data = require('../../../data');
module.exports = {
generic: true,
types: data.types,
atrules: data.atrules,
properties: data.properties,
node: require('../node')
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/config/mix.js generated vendored Normal file
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const hasOwnProperty = Object.prototype.hasOwnProperty;
const shape = {
generic: true,
types: appendOrAssign,
atrules: {
prelude: appendOrAssignOrNull,
descriptors: appendOrAssignOrNull
},
properties: appendOrAssign,
parseContext: assign,
scope: deepAssign,
atrule: ['parse'],
pseudo: ['parse'],
node: ['name', 'structure', 'parse', 'generate', 'walkContext']
};
function isObject(value) {
return value && value.constructor === Object;
}
function copy(value) {
return isObject(value)
? Object.assign({}, value)
: value;
}
function assign(dest, src) {
return Object.assign(dest, src);
}
function deepAssign(dest, src) {
for (const key in src) {
if (hasOwnProperty.call(src, key)) {
if (isObject(dest[key])) {
deepAssign(dest[key], copy(src[key]));
} else {
dest[key] = copy(src[key]);
}
}
}
return dest;
}
function append(a, b) {
if (typeof b === 'string' && /^\s*\|/.test(b)) {
return typeof a === 'string'
? a + b
: b.replace(/^\s*\|\s*/, '');
}
return b || null;
}
function appendOrAssign(a, b) {
if (typeof b === 'string') {
return append(a, b);
}
const result = Object.assign({}, a);
for (let key in b) {
if (hasOwnProperty.call(b, key)) {
result[key] = append(hasOwnProperty.call(a, key) ? a[key] : undefined, b[key]);
}
}
return result;
}
function appendOrAssignOrNull(a, b) {
const result = appendOrAssign(a, b);
return !isObject(result) || Object.keys(result).length
? result
: null;
}
function mix(dest, src, shape) {
for (const key in shape) {
if (hasOwnProperty.call(shape, key) === false) {
continue;
}
if (shape[key] === true) {
if (key in src) {
if (hasOwnProperty.call(src, key)) {
dest[key] = copy(src[key]);
}
}
} else if (shape[key]) {
if (typeof shape[key] === 'function') {
const fn = shape[key];
dest[key] = fn({}, dest[key]);
dest[key] = fn(dest[key] || {}, src[key]);
} else if (isObject(shape[key])) {
const result = {};
for (let name in dest[key]) {
result[name] = mix({}, dest[key][name], shape[key]);
}
for (let name in src[key]) {
result[name] = mix(result[name] || {}, src[key][name], shape[key]);
}
dest[key] = result;
} else if (Array.isArray(shape[key])) {
const res = {};
const innerShape = shape[key].reduce(function(s, k) {
s[k] = true;
return s;
}, {});
for (const [name, value] of Object.entries(dest[key] || {})) {
res[name] = {};
if (value) {
mix(res[name], value, innerShape);
}
}
for (const name in src[key]) {
if (hasOwnProperty.call(src[key], name)) {
if (!res[name]) {
res[name] = {};
}
if (src[key] && src[key][name]) {
mix(res[name], src[key][name], innerShape);
}
}
}
dest[key] = res;
}
}
}
return dest;
}
module.exports = (dest, src) => mix(dest, src, shape);

25
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/config/parser.js generated vendored Normal file
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module.exports = {
parseContext: {
default: 'StyleSheet',
stylesheet: 'StyleSheet',
atrule: 'Atrule',
atrulePrelude: function(options) {
return this.AtrulePrelude(options.atrule ? String(options.atrule) : null);
},
mediaQueryList: 'MediaQueryList',
mediaQuery: 'MediaQuery',
rule: 'Rule',
selectorList: 'SelectorList',
selector: 'Selector',
block: function() {
return this.Block(true);
},
declarationList: 'DeclarationList',
declaration: 'Declaration',
value: 'Value'
},
scope: require('../scope'),
atrule: require('../atrule'),
pseudo: require('../pseudo'),
node: require('../node')
};

3
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/config/walker.js generated vendored Normal file
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module.exports = {
node: require('../node')
};

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assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/create.js generated vendored Normal file
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var List = require('../common/List');
var SyntaxError = require('../common/SyntaxError');
var TokenStream = require('../common/TokenStream');
var Lexer = require('../lexer/Lexer');
var definitionSyntax = require('../definition-syntax');
var tokenize = require('../tokenizer');
var createParser = require('../parser/create');
var createGenerator = require('../generator/create');
var createConvertor = require('../convertor/create');
var createWalker = require('../walker/create');
var clone = require('../utils/clone');
var names = require('../utils/names');
var mix = require('./config/mix');
function createSyntax(config) {
var parse = createParser(config);
var walk = createWalker(config);
var generate = createGenerator(config);
var convert = createConvertor(walk);
var syntax = {
List: List,
SyntaxError: SyntaxError,
TokenStream: TokenStream,
Lexer: Lexer,
vendorPrefix: names.vendorPrefix,
keyword: names.keyword,
property: names.property,
isCustomProperty: names.isCustomProperty,
definitionSyntax: definitionSyntax,
lexer: null,
createLexer: function(config) {
return new Lexer(config, syntax, syntax.lexer.structure);
},
tokenize: tokenize,
parse: parse,
walk: walk,
generate: generate,
find: walk.find,
findLast: walk.findLast,
findAll: walk.findAll,
clone: clone,
fromPlainObject: convert.fromPlainObject,
toPlainObject: convert.toPlainObject,
createSyntax: function(config) {
return createSyntax(mix({}, config));
},
fork: function(extension) {
var base = mix({}, config); // copy of config
return createSyntax(
typeof extension === 'function'
? extension(base, Object.assign)
: mix(base, extension)
);
}
};
syntax.lexer = new Lexer({
generic: true,
types: config.types,
atrules: config.atrules,
properties: config.properties,
node: config.node
}, syntax);
return syntax;
};
exports.create = function(config) {
return createSyntax(mix({}, config));
};

7
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/function/expression.js generated vendored Normal file
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// legacy IE function
// expression( <any-value> )
module.exports = function() {
return this.createSingleNodeList(
this.Raw(this.scanner.tokenIndex, null, false)
);
};

43
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/function/var.js generated vendored Normal file
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var TYPE = require('../../tokenizer').TYPE;
var rawMode = require('../node/Raw').mode;
var COMMA = TYPE.Comma;
var WHITESPACE = TYPE.WhiteSpace;
// var( <ident> , <value>? )
module.exports = function() {
var children = this.createList();
this.scanner.skipSC();
// NOTE: Don't check more than a first argument is an ident, rest checks are for lexer
children.push(this.Identifier());
this.scanner.skipSC();
if (this.scanner.tokenType === COMMA) {
children.push(this.Operator());
const startIndex = this.scanner.tokenIndex;
const value = this.parseCustomProperty
? this.Value(null)
: this.Raw(this.scanner.tokenIndex, rawMode.exclamationMarkOrSemicolon, false);
if (value.type === 'Value' && value.children.isEmpty()) {
for (let offset = startIndex - this.scanner.tokenIndex; offset <= 0; offset++) {
if (this.scanner.lookupType(offset) === WHITESPACE) {
value.children.appendData({
type: 'WhiteSpace',
loc: null,
value: ' '
});
break;
}
}
}
children.push(value);
}
return children;
};

21
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/index.js generated vendored Normal file
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function merge() {
var dest = {};
for (var i = 0; i < arguments.length; i++) {
var src = arguments[i];
for (var key in src) {
dest[key] = src[key];
}
}
return dest;
}
module.exports = require('./create').create(
merge(
require('./config/lexer'),
require('./config/parser'),
require('./config/walker')
)
);
module.exports.version = require('../../package.json').version;

297
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/node/AnPlusB.js generated vendored Normal file
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var cmpChar = require('../../tokenizer').cmpChar;
var isDigit = require('../../tokenizer').isDigit;
var TYPE = require('../../tokenizer').TYPE;
var WHITESPACE = TYPE.WhiteSpace;
var COMMENT = TYPE.Comment;
var IDENT = TYPE.Ident;
var NUMBER = TYPE.Number;
var DIMENSION = TYPE.Dimension;
var PLUSSIGN = 0x002B; // U+002B PLUS SIGN (+)
var HYPHENMINUS = 0x002D; // U+002D HYPHEN-MINUS (-)
var N = 0x006E; // U+006E LATIN SMALL LETTER N (n)
var DISALLOW_SIGN = true;
var ALLOW_SIGN = false;
function checkInteger(offset, disallowSign) {
var pos = this.scanner.tokenStart + offset;
var code = this.scanner.source.charCodeAt(pos);
if (code === PLUSSIGN || code === HYPHENMINUS) {
if (disallowSign) {
this.error('Number sign is not allowed');
}
pos++;
}
for (; pos < this.scanner.tokenEnd; pos++) {
if (!isDigit(this.scanner.source.charCodeAt(pos))) {
this.error('Integer is expected', pos);
}
}
}
function checkTokenIsInteger(disallowSign) {
return checkInteger.call(this, 0, disallowSign);
}
function expectCharCode(offset, code) {
if (!cmpChar(this.scanner.source, this.scanner.tokenStart + offset, code)) {
var msg = '';
switch (code) {
case N:
msg = 'N is expected';
break;
case HYPHENMINUS:
msg = 'HyphenMinus is expected';
break;
}
this.error(msg, this.scanner.tokenStart + offset);
}
}
// ... <signed-integer>
// ... ['+' | '-'] <signless-integer>
function consumeB() {
var offset = 0;
var sign = 0;
var type = this.scanner.tokenType;
while (type === WHITESPACE || type === COMMENT) {
type = this.scanner.lookupType(++offset);
}
if (type !== NUMBER) {
if (this.scanner.isDelim(PLUSSIGN, offset) ||
this.scanner.isDelim(HYPHENMINUS, offset)) {
sign = this.scanner.isDelim(PLUSSIGN, offset) ? PLUSSIGN : HYPHENMINUS;
do {
type = this.scanner.lookupType(++offset);
} while (type === WHITESPACE || type === COMMENT);
if (type !== NUMBER) {
this.scanner.skip(offset);
checkTokenIsInteger.call(this, DISALLOW_SIGN);
}
} else {
return null;
}
}
if (offset > 0) {
this.scanner.skip(offset);
}
if (sign === 0) {
type = this.scanner.source.charCodeAt(this.scanner.tokenStart);
if (type !== PLUSSIGN && type !== HYPHENMINUS) {
this.error('Number sign is expected');
}
}
checkTokenIsInteger.call(this, sign !== 0);
return sign === HYPHENMINUS ? '-' + this.consume(NUMBER) : this.consume(NUMBER);
}
// An+B microsyntax https://www.w3.org/TR/css-syntax-3/#anb
module.exports = {
name: 'AnPlusB',
structure: {
a: [String, null],
b: [String, null]
},
parse: function() {
/* eslint-disable brace-style*/
var start = this.scanner.tokenStart;
var a = null;
var b = null;
// <integer>
if (this.scanner.tokenType === NUMBER) {
checkTokenIsInteger.call(this, ALLOW_SIGN);
b = this.consume(NUMBER);
}
// -n
// -n <signed-integer>
// -n ['+' | '-'] <signless-integer>
// -n- <signless-integer>
// <dashndashdigit-ident>
else if (this.scanner.tokenType === IDENT && cmpChar(this.scanner.source, this.scanner.tokenStart, HYPHENMINUS)) {
a = '-1';
expectCharCode.call(this, 1, N);
switch (this.scanner.getTokenLength()) {
// -n
// -n <signed-integer>
// -n ['+' | '-'] <signless-integer>
case 2:
this.scanner.next();
b = consumeB.call(this);
break;
// -n- <signless-integer>
case 3:
expectCharCode.call(this, 2, HYPHENMINUS);
this.scanner.next();
this.scanner.skipSC();
checkTokenIsInteger.call(this, DISALLOW_SIGN);
b = '-' + this.consume(NUMBER);
break;
// <dashndashdigit-ident>
default:
expectCharCode.call(this, 2, HYPHENMINUS);
checkInteger.call(this, 3, DISALLOW_SIGN);
this.scanner.next();
b = this.scanner.substrToCursor(start + 2);
}
}
// '+'? n
// '+'? n <signed-integer>
// '+'? n ['+' | '-'] <signless-integer>
// '+'? n- <signless-integer>
// '+'? <ndashdigit-ident>
else if (this.scanner.tokenType === IDENT || (this.scanner.isDelim(PLUSSIGN) && this.scanner.lookupType(1) === IDENT)) {
var sign = 0;
a = '1';
// just ignore a plus
if (this.scanner.isDelim(PLUSSIGN)) {
sign = 1;
this.scanner.next();
}
expectCharCode.call(this, 0, N);
switch (this.scanner.getTokenLength()) {
// '+'? n
// '+'? n <signed-integer>
// '+'? n ['+' | '-'] <signless-integer>
case 1:
this.scanner.next();
b = consumeB.call(this);
break;
// '+'? n- <signless-integer>
case 2:
expectCharCode.call(this, 1, HYPHENMINUS);
this.scanner.next();
this.scanner.skipSC();
checkTokenIsInteger.call(this, DISALLOW_SIGN);
b = '-' + this.consume(NUMBER);
break;
// '+'? <ndashdigit-ident>
default:
expectCharCode.call(this, 1, HYPHENMINUS);
checkInteger.call(this, 2, DISALLOW_SIGN);
this.scanner.next();
b = this.scanner.substrToCursor(start + sign + 1);
}
}
// <ndashdigit-dimension>
// <ndash-dimension> <signless-integer>
// <n-dimension>
// <n-dimension> <signed-integer>
// <n-dimension> ['+' | '-'] <signless-integer>
else if (this.scanner.tokenType === DIMENSION) {
var code = this.scanner.source.charCodeAt(this.scanner.tokenStart);
var sign = code === PLUSSIGN || code === HYPHENMINUS;
for (var i = this.scanner.tokenStart + sign; i < this.scanner.tokenEnd; i++) {
if (!isDigit(this.scanner.source.charCodeAt(i))) {
break;
}
}
if (i === this.scanner.tokenStart + sign) {
this.error('Integer is expected', this.scanner.tokenStart + sign);
}
expectCharCode.call(this, i - this.scanner.tokenStart, N);
a = this.scanner.source.substring(start, i);
// <n-dimension>
// <n-dimension> <signed-integer>
// <n-dimension> ['+' | '-'] <signless-integer>
if (i + 1 === this.scanner.tokenEnd) {
this.scanner.next();
b = consumeB.call(this);
} else {
expectCharCode.call(this, i - this.scanner.tokenStart + 1, HYPHENMINUS);
// <ndash-dimension> <signless-integer>
if (i + 2 === this.scanner.tokenEnd) {
this.scanner.next();
this.scanner.skipSC();
checkTokenIsInteger.call(this, DISALLOW_SIGN);
b = '-' + this.consume(NUMBER);
}
// <ndashdigit-dimension>
else {
checkInteger.call(this, i - this.scanner.tokenStart + 2, DISALLOW_SIGN);
this.scanner.next();
b = this.scanner.substrToCursor(i + 1);
}
}
} else {
this.error();
}
if (a !== null && a.charCodeAt(0) === PLUSSIGN) {
a = a.substr(1);
}
if (b !== null && b.charCodeAt(0) === PLUSSIGN) {
b = b.substr(1);
}
return {
type: 'AnPlusB',
loc: this.getLocation(start, this.scanner.tokenStart),
a: a,
b: b
};
},
generate: function(node) {
var a = node.a !== null && node.a !== undefined;
var b = node.b !== null && node.b !== undefined;
if (a) {
this.chunk(
node.a === '+1' ? '+n' : // eslint-disable-line operator-linebreak, indent
node.a === '1' ? 'n' : // eslint-disable-line operator-linebreak, indent
node.a === '-1' ? '-n' : // eslint-disable-line operator-linebreak, indent
node.a + 'n' // eslint-disable-line operator-linebreak, indent
);
if (b) {
b = String(node.b);
if (b.charAt(0) === '-' || b.charAt(0) === '+') {
this.chunk(b.charAt(0));
this.chunk(b.substr(1));
} else {
this.chunk('+');
this.chunk(b);
}
}
} else {
this.chunk(String(node.b));
}
}
};

107
assets_old/node_modules/csso/node_modules/css-tree/lib/syntax/node/Atrule.js generated vendored Normal file
View file

@ -0,0 +1,107 @@
var TYPE = require('../../tokenizer').TYPE;
var rawMode = require('./Raw').mode;
var ATKEYWORD = TYPE.AtKeyword;
var SEMICOLON = TYPE.Semicolon;
var LEFTCURLYBRACKET = TYPE.LeftCurlyBracket;
var RIGHTCURLYBRACKET = TYPE.RightCurlyBracket;
function consumeRaw(startToken) {
return this.Raw(startToken, rawMode.leftCurlyBracketOrSemicolon, true);
}
function isDeclarationBlockAtrule() {
for (var offset = 1, type; type = this.scanner.lookupType(offset); offset++) {
if (type === RIGHTCURLYBRACKET) {
return true;
}
if (type === LEFTCURLYBRACKET ||
type === ATKEYWORD) {
return false;
}
}
return false;
}
module.exports = {
name: 'Atrule',
structure: {
name: String,
prelude: ['AtrulePrelude', 'Raw', null],
block: ['Block', null]
},
parse: function() {
var start = this.scanner.tokenStart;
var name;
var nameLowerCase;
var prelude = null;
var block = null;
this.eat(ATKEYWORD);
name = this.scanner.substrToCursor(start + 1);
nameLowerCase = name.toLowerCase();
this.scanner.skipSC();
// parse prelude
if (this.scanner.eof === false &&
this.scanner.tokenType !== LEFTCURLYBRACKET &&
this.scanner.tokenType !== SEMICOLON) {
if (this.parseAtrulePrelude) {
prelude = this.parseWithFallback(this.AtrulePrelude.bind(this, name), consumeRaw);
// turn empty AtrulePrelude into null
if (prelude.type === 'AtrulePrelude' && prelude.children.head === null) {
prelude = null;
}
} else {
prelude = consumeRaw.call(this, this.scanner.tokenIndex);
}
this.scanner.skipSC();
}
switch (this.scanner.tokenType) {
case SEMICOLON:
this.scanner.next();
break;
case LEFTCURLYBRACKET:
if (this.atrule.hasOwnProperty(nameLowerCase) &&
typeof this.atrule[nameLowerCase].block === 'function') {
block = this.atrule[nameLowerCase].block.call(this);
} else {
// TODO: should consume block content as Raw?
block = this.Block(isDeclarationBlockAtrule.call(this));
}
break;
}
return {
type: 'Atrule',
loc: this.getLocation(start, this.scanner.tokenStart),
name: name,
prelude: prelude,
block: block
};
},
generate: function(node) {
this.chunk('@');
this.chunk(node.name);
if (node.prelude !== null) {
this.chunk(' ');
this.node(node.prelude);
}
if (node.block) {
this.node(node.block);
} else {
this.chunk(';');
}
},
walkContext: 'atrule'
};

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