67 lines
1.5 KiB
JavaScript
67 lines
1.5 KiB
JavaScript
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var List = require('../../../utils/list.js');
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module.exports = function compressBackground(node) {
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function lastType() {
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if (buffer.length) {
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return buffer[buffer.length - 1].type;
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}
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}
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function flush() {
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if (lastType() === 'Space') {
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buffer.pop();
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}
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if (!buffer.length) {
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buffer.unshift(
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{
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type: 'Number',
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value: '0'
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},
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{
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type: 'Space'
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},
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{
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type: 'Number',
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value: '0'
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}
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);
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}
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newValue.push.apply(newValue, buffer);
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buffer = [];
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}
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var newValue = [];
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var buffer = [];
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node.sequence.each(function(node) {
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if (node.type === 'Operator' && node.value === ',') {
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flush();
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newValue.push(node);
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return;
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}
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// remove defaults
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if (node.type === 'Identifier') {
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if (node.name === 'transparent' ||
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node.name === 'none' ||
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node.name === 'repeat' ||
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node.name === 'scroll') {
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return;
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}
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}
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// don't add redundant spaces
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if (node.type === 'Space' && (!buffer.length || lastType() === 'Space')) {
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return;
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}
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buffer.push(node);
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});
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flush();
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node.sequence = new List(newValue);
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};
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