140 lines
3.9 KiB
JavaScript
140 lines
3.9 KiB
JavaScript
var mergeAdjacent = require('./merge-adjacent');
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var mergeMediaQueries = require('./merge-media-queries');
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var mergeNonAdjacentByBody = require('./merge-non-adjacent-by-body');
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var mergeNonAdjacentBySelector = require('./merge-non-adjacent-by-selector');
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var reduceNonAdjacent = require('./reduce-non-adjacent');
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var removeDuplicateFontAtRules = require('./remove-duplicate-font-at-rules');
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var removeDuplicateMediaQueries = require('./remove-duplicate-media-queries');
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var removeDuplicates = require('./remove-duplicates');
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var removeUnusedAtRules = require('./remove-unused-at-rules');
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var restructure = require('./restructure');
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var optimizeProperties = require('./properties/optimize');
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var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel;
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var Token = require('../../tokenizer/token');
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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 Token.RULE:
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isEmpty = token[1].length === 0 || token[2].length === 0;
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break;
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case Token.NESTED_BLOCK:
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removeEmpty(token[2]);
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isEmpty = token[2].length === 0;
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break;
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case Token.AT_RULE:
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isEmpty = token[1].length === 0;
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break;
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case Token.AT_RULE_BLOCK:
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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, 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] == Token.NESTED_BLOCK) {
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var isKeyframes = /@(-moz-|-o-|-webkit-)?keyframes/.test(token[1][0][1]);
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level2Optimize(token[2], context, !isKeyframes);
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}
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}
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}
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function recursivelyOptimizeProperties(tokens, 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 Token.RULE:
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optimizeProperties(token[2], true, true, context);
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break;
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case Token.NESTED_BLOCK:
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recursivelyOptimizeProperties(token[2], context);
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}
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}
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}
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function level2Optimize(tokens, context, withRestructuring) {
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var levelOptions = context.options.level[OptimizationLevel.Two];
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var level2Plugins = context.options.plugins.level2Block;
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var reduced;
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var i;
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recursivelyOptimizeBlocks(tokens, context);
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recursivelyOptimizeProperties(tokens, context);
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if (levelOptions.removeDuplicateRules) {
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removeDuplicates(tokens, context);
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}
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if (levelOptions.mergeAdjacentRules) {
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mergeAdjacent(tokens, context);
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}
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if (levelOptions.reduceNonAdjacentRules) {
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reduceNonAdjacent(tokens, context);
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}
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if (levelOptions.mergeNonAdjacentRules && levelOptions.mergeNonAdjacentRules != 'body') {
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mergeNonAdjacentBySelector(tokens, context);
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}
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if (levelOptions.mergeNonAdjacentRules && levelOptions.mergeNonAdjacentRules != 'selector') {
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mergeNonAdjacentByBody(tokens, context);
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}
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if (levelOptions.restructureRules && levelOptions.mergeAdjacentRules && withRestructuring) {
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restructure(tokens, context);
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mergeAdjacent(tokens, context);
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}
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if (levelOptions.restructureRules && !levelOptions.mergeAdjacentRules && withRestructuring) {
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restructure(tokens, context);
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}
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if (levelOptions.removeDuplicateFontRules) {
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removeDuplicateFontAtRules(tokens, context);
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}
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if (levelOptions.removeDuplicateMediaBlocks) {
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removeDuplicateMediaQueries(tokens, context);
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}
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if (levelOptions.removeUnusedAtRules) {
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removeUnusedAtRules(tokens, context);
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}
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if (levelOptions.mergeMedia) {
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reduced = mergeMediaQueries(tokens, context);
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for (i = reduced.length - 1; i >= 0; i--) {
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level2Optimize(reduced[i][2], context, false);
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}
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}
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for (i = 0; i < level2Plugins.length; i++) {
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level2Plugins[i](tokens);
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}
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if (levelOptions.removeEmpty) {
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removeEmpty(tokens);
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}
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return tokens;
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}
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module.exports = level2Optimize;
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