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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);
| };
|
|
