shift73k/assets_old/node_modules/postcss-minify-gradients/dist/index.js

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'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _postcss = require('postcss');
var _postcss2 = _interopRequireDefault(_postcss);
var _postcssValueParser = require('postcss-value-parser');
var _postcssValueParser2 = _interopRequireDefault(_postcssValueParser);
var _cssnanoUtilGetArguments = require('cssnano-util-get-arguments');
var _cssnanoUtilGetArguments2 = _interopRequireDefault(_cssnanoUtilGetArguments);
var _isColorStop = require('is-color-stop');
var _isColorStop2 = _interopRequireDefault(_isColorStop);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
const angles = {
top: '0deg',
right: '90deg',
bottom: '180deg',
left: '270deg'
};
function isLessThan(a, b) {
return a.unit.toLowerCase() === b.unit.toLowerCase() && parseFloat(a.number) >= parseFloat(b.number);
}
function optimise(decl) {
const value = decl.value;
if (!~value.toLowerCase().indexOf('gradient')) {
return;
}
decl.value = (0, _postcssValueParser2.default)(value).walk(node => {
if (node.type !== 'function' || !node.nodes.length) {
return false;
}
const lowerCasedValue = node.value.toLowerCase();
if (lowerCasedValue === 'linear-gradient' || lowerCasedValue === 'repeating-linear-gradient' || lowerCasedValue === '-webkit-linear-gradient' || lowerCasedValue === '-webkit-repeating-linear-gradient') {
let args = (0, _cssnanoUtilGetArguments2.default)(node);
if (node.nodes[0].value.toLowerCase() === 'to' && args[0].length === 3) {
node.nodes = node.nodes.slice(2);
node.nodes[0].value = angles[node.nodes[0].value.toLowerCase()];
}
let lastStop = null;
args.forEach((arg, index) => {
if (!arg[2]) {
return;
}
let isFinalStop = index === args.length - 1;
let thisStop = (0, _postcssValueParser.unit)(arg[2].value);
if (lastStop === null) {
lastStop = thisStop;
if (!isFinalStop && lastStop && lastStop.number === '0' && lastStop.unit.toLowerCase() !== 'deg') {
arg[1].value = arg[2].value = '';
}
return;
}
if (lastStop && thisStop && isLessThan(lastStop, thisStop)) {
arg[2].value = 0;
}
lastStop = thisStop;
if (isFinalStop && arg[2].value === '100%') {
arg[1].value = arg[2].value = '';
}
});
return false;
}
if (lowerCasedValue === 'radial-gradient' || lowerCasedValue === 'repeating-radial-gradient') {
let args = (0, _cssnanoUtilGetArguments2.default)(node);
let lastStop;
const hasAt = args[0].find(n => n.value.toLowerCase() === 'at');
args.forEach((arg, index) => {
if (!arg[2] || !index && hasAt) {
return;
}
let thisStop = (0, _postcssValueParser.unit)(arg[2].value);
if (!lastStop) {
lastStop = thisStop;
return;
}
if (lastStop && thisStop && isLessThan(lastStop, thisStop)) {
arg[2].value = 0;
}
lastStop = thisStop;
});
return false;
}
if (lowerCasedValue === '-webkit-radial-gradient' || lowerCasedValue === '-webkit-repeating-radial-gradient') {
let args = (0, _cssnanoUtilGetArguments2.default)(node);
let lastStop;
args.forEach(arg => {
let color;
let stop;
if (arg[2] !== undefined) {
if (arg[0].type === 'function') {
color = `${arg[0].value}(${(0, _postcssValueParser.stringify)(arg[0].nodes)})`;
} else {
color = arg[0].value;
}
if (arg[2].type === 'function') {
stop = `${arg[2].value}(${(0, _postcssValueParser.stringify)(arg[2].nodes)})`;
} else {
stop = arg[2].value;
}
} else {
if (arg[0].type === 'function') {
color = `${arg[0].value}(${(0, _postcssValueParser.stringify)(arg[0].nodes)})`;
}
color = arg[0].value;
}
color = color.toLowerCase();
const colorStop = stop || stop === 0 ? (0, _isColorStop2.default)(color, stop.toLowerCase()) : (0, _isColorStop2.default)(color);
if (!colorStop || !arg[2]) {
return;
}
let thisStop = (0, _postcssValueParser.unit)(arg[2].value);
if (!lastStop) {
lastStop = thisStop;
return;
}
if (lastStop && thisStop && isLessThan(lastStop, thisStop)) {
arg[2].value = 0;
}
lastStop = thisStop;
});
return false;
}
}).toString();
}
exports.default = _postcss2.default.plugin('postcss-minify-gradients', () => {
return css => css.walkDecls(optimise);
});
module.exports = exports['default'];