73 lines
1.9 KiB
JavaScript
73 lines
1.9 KiB
JavaScript
var split = require('../../../utils/split');
|
|
var startsAsUrl = require('./starts-as-url');
|
|
|
|
var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
|
|
|
|
var EXPRESSION_PATTERN = /^expression\(.*\)$/;
|
|
var ANY_FUNCTION_PATTERN = /^(-(?:moz|ms|o|webkit)-[a-z-]+|[a-z-]+)\((.+)\)$/;
|
|
var TOKEN_SEPARATOR_PATTERN = /([\s,/])/;
|
|
|
|
var DOT_ZERO_PATTERN = /(^|\D)\.0+(\D|$)/g;
|
|
var FRACTION_PATTERN = /\.([1-9]*)0+(\D|$)/g;
|
|
var LEADING_ZERO_FRACTION_PATTERN = /(^|\D)0\.(\d)/g;
|
|
var MINUS_ZERO_FRACTION_PATTERN = /([^\w\d-]|^)-0([^.]|$)/g;
|
|
var ZERO_PREFIXED_UNIT_PATTERN = /(^|\s)0+([1-9])/g;
|
|
|
|
function optimizeRecursively(value) {
|
|
var functionTokens;
|
|
var tokens;
|
|
|
|
if (startsAsUrl(value)) {
|
|
return value;
|
|
}
|
|
|
|
if (EXPRESSION_PATTERN.test(value)) {
|
|
return value;
|
|
}
|
|
|
|
functionTokens = ANY_FUNCTION_PATTERN.exec(value);
|
|
|
|
if (!functionTokens) {
|
|
return optimizeFractions(value);
|
|
}
|
|
|
|
tokens = split(functionTokens[2], TOKEN_SEPARATOR_PATTERN)
|
|
.map(function(token) { return optimizeRecursively(token); });
|
|
|
|
return functionTokens[1] + '(' + tokens.join('') + ')';
|
|
}
|
|
|
|
function optimizeFractions(value) {
|
|
if (value.indexOf('0') == -1) {
|
|
return value;
|
|
}
|
|
|
|
if (value.indexOf('-') > -1) {
|
|
value = value
|
|
.replace(MINUS_ZERO_FRACTION_PATTERN, '$10$2')
|
|
.replace(MINUS_ZERO_FRACTION_PATTERN, '$10$2');
|
|
}
|
|
|
|
return value
|
|
.replace(ZERO_PREFIXED_UNIT_PATTERN, '$1$2')
|
|
.replace(DOT_ZERO_PATTERN, '$10$2')
|
|
.replace(FRACTION_PATTERN, function(match, nonZeroPart, suffix) {
|
|
return (nonZeroPart.length > 0 ? '.' : '') + nonZeroPart + suffix;
|
|
})
|
|
.replace(LEADING_ZERO_FRACTION_PATTERN, '$1.$2');
|
|
}
|
|
|
|
var plugin = {
|
|
level1: {
|
|
value: function fraction(name, value, options) {
|
|
if (!options.level[OptimizationLevel.One].replaceZeroUnits) {
|
|
return value;
|
|
}
|
|
|
|
return optimizeRecursively(value);
|
|
}
|
|
}
|
|
};
|
|
|
|
module.exports = plugin;
|