extract-properties.js
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// This extractor is used in level 2 optimizations
// IMPORTANT: Mind Token class and this code is not related!
// Properties will be tokenized in one step, see #429
var Token = require('../../tokenizer/token');
var serializeRules = require('../../writer/one-time').rules;
var serializeValue = require('../../writer/one-time').value;
function extractProperties(token) {
var properties = [];
var inSpecificSelector;
var property;
var name;
var value;
var i, l;
if (token[0] == Token.RULE) {
inSpecificSelector = !/[\.\+>~]/.test(serializeRules(token[1]));
for (i = 0, l = token[2].length; i < l; i++) {
property = token[2][i];
if (property[0] != Token.PROPERTY)
continue;
name = property[1][1];
if (name.length === 0)
continue;
if (name.indexOf('--') === 0)
continue;
value = serializeValue(property, i);
properties.push([
name,
value,
findNameRoot(name),
token[2][i],
name + ':' + value,
token[1],
inSpecificSelector
]);
}
} else if (token[0] == Token.NESTED_BLOCK) {
for (i = 0, l = token[2].length; i < l; i++) {
properties = properties.concat(extractProperties(token[2][i]));
}
}
return properties;
}
function findNameRoot(name) {
if (name == 'list-style')
return name;
if (name.indexOf('-radius') > 0)
return 'border-radius';
if (name == 'border-collapse' || name == 'border-spacing' || name == 'border-image')
return name;
if (name.indexOf('border-') === 0 && /^border\-\w+\-\w+$/.test(name))
return name.match(/border\-\w+/)[0];
if (name.indexOf('border-') === 0 && /^border\-\w+$/.test(name))
return 'border';
if (name.indexOf('text-') === 0)
return name;
if (name == '-chrome-')
return name;
return name.replace(/^\-\w+\-/, '').match(/([a-zA-Z]+)/)[0].toLowerCase();
}
module.exports = extractProperties;