forked from zhurui/management
87 lines
2.5 KiB
JavaScript
87 lines
2.5 KiB
JavaScript
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var optimizeProperties = require('../properties/optimizer');
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var removeDuplicates = require('./remove-duplicates');
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var mergeAdjacent = require('./merge-adjacent');
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var reduceNonAdjacent = require('./reduce-non-adjacent');
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var mergeNonAdjacentBySelector = require('./merge-non-adjacent-by-selector');
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var mergeNonAdjacentByBody = require('./merge-non-adjacent-by-body');
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var restructure = require('./restructure');
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var removeDuplicateMediaQueries = require('./remove-duplicate-media-queries');
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var mergeMediaQueries = require('./merge-media-queries');
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function removeEmpty(tokens) {
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for (var i = 0, l = tokens.length; i < l; i++) {
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var token = tokens[i];
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var isEmpty = false;
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switch (token[0]) {
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case 'selector':
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isEmpty = token[1].length === 0 || token[2].length === 0;
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break;
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case 'block':
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removeEmpty(token[2]);
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isEmpty = token[2].length === 0;
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}
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if (isEmpty) {
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tokens.splice(i, 1);
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i--;
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l--;
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}
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}
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}
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function recursivelyOptimizeBlocks(tokens, options, context) {
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for (var i = 0, l = tokens.length; i < l; i++) {
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var token = tokens[i];
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if (token[0] == 'block') {
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var isKeyframes = /@(-moz-|-o-|-webkit-)?keyframes/.test(token[1][0]);
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optimize(token[2], options, context, !isKeyframes);
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}
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}
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}
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function recursivelyOptimizeProperties(tokens, options, context) {
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for (var i = 0, l = tokens.length; i < l; i++) {
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var token = tokens[i];
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switch (token[0]) {
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case 'selector':
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optimizeProperties(token[1], token[2], false, true, options, context);
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break;
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case 'block':
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recursivelyOptimizeProperties(token[2], options, context);
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}
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}
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}
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function optimize(tokens, options, context, withRestructuring) {
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recursivelyOptimizeBlocks(tokens, options, context);
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recursivelyOptimizeProperties(tokens, options, context);
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removeDuplicates(tokens);
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mergeAdjacent(tokens, options, context);
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reduceNonAdjacent(tokens, options, context);
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mergeNonAdjacentBySelector(tokens, options, context);
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mergeNonAdjacentByBody(tokens, options);
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if (options.restructuring && withRestructuring) {
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restructure(tokens, options);
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mergeAdjacent(tokens, options, context);
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}
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if (options.mediaMerging) {
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removeDuplicateMediaQueries(tokens);
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var reduced = mergeMediaQueries(tokens);
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for (var i = reduced.length - 1; i >= 0; i--) {
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optimize(reduced[i][2], options, context, false);
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}
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}
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removeEmpty(tokens);
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}
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module.exports = optimize;
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