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var isMergeable = require('./is-mergeable');
var optimizeProperties = require('./properties/optimize');
var sortSelectors = require('../level-1/sort-selectors');
var tidyRules = require('../level-1/tidy-rules');
var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel;
var serializeBody = require('../../writer/one-time').body;
var serializeRules = require('../../writer/one-time').rules;
var Token = require('../../tokenizer/token');
function mergeAdjacent(tokens, context) {
var lastToken = [null, [], []];
var options = context.options;
var adjacentSpace = options.compatibility.selectors.adjacentSpace;
var selectorsSortingMethod = options.level[OptimizationLevel.One].selectorsSortingMethod;
var mergeablePseudoClasses = options.compatibility.selectors.mergeablePseudoClasses;
var mergeablePseudoElements = options.compatibility.selectors.mergeablePseudoElements;
var mergeLimit = options.compatibility.selectors.mergeLimit;
var multiplePseudoMerging = options.compatibility.selectors.multiplePseudoMerging;
for (var i = 0, l = tokens.length; i < l; i++) {
var token = tokens[i];
if (token[0] != Token.RULE) {
lastToken = [null, [], []];
continue;
}
if (lastToken[0] == Token.RULE && serializeRules(token[1]) == serializeRules(lastToken[1])) {
Array.prototype.push.apply(lastToken[2], token[2]);
optimizeProperties(lastToken[2], true, true, context);
token[2] = [];
} else if (lastToken[0] == Token.RULE && serializeBody(token[2]) == serializeBody(lastToken[2])
&& isMergeable(serializeRules(token[1]), mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging)
&& isMergeable(
serializeRules(lastToken[1]),
mergeablePseudoClasses,
mergeablePseudoElements,
multiplePseudoMerging
)
&& lastToken[1].length < mergeLimit) {
lastToken[1] = tidyRules(lastToken[1].concat(token[1]), false, adjacentSpace, false, context.warnings);
lastToken[1] = lastToken.length > 1 ? sortSelectors(lastToken[1], selectorsSortingMethod) : lastToken[1];
token[2] = [];
} else {
lastToken = token;
}
}
}
module.exports = mergeAdjacent;
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