var roundingPrecisionFrom = require('./rounding-precision').roundingPrecisionFrom;
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var override = require('../utils/override');
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var OptimizationLevel = {
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Zero: '0',
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One: '1',
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Two: '2'
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};
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var DEFAULTS = {};
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DEFAULTS[OptimizationLevel.Zero] = {};
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DEFAULTS[OptimizationLevel.One] = {
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cleanupCharsets: true,
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normalizeUrls: true,
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optimizeBackground: true,
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optimizeBorderRadius: true,
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optimizeFilter: true,
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optimizeFontWeight: true,
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optimizeOutline: true,
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removeEmpty: true,
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removeNegativePaddings: true,
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removeQuotes: true,
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removeWhitespace: true,
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replaceMultipleZeros: true,
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replaceTimeUnits: true,
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replaceZeroUnits: true,
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roundingPrecision: roundingPrecisionFrom(undefined),
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selectorsSortingMethod: 'standard',
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specialComments: 'all',
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tidyAtRules: true,
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tidyBlockScopes: true,
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tidySelectors: true,
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transform: noop
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};
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DEFAULTS[OptimizationLevel.Two] = {
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mergeAdjacentRules: true,
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mergeIntoShorthands: true,
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mergeMedia: true,
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mergeNonAdjacentRules: true,
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mergeSemantically: false,
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overrideProperties: true,
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removeEmpty: true,
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reduceNonAdjacentRules: true,
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removeDuplicateFontRules: true,
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removeDuplicateMediaBlocks: true,
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removeDuplicateRules: true,
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removeUnusedAtRules: false,
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restructureRules: false,
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skipProperties: []
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};
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var ALL_KEYWORD_1 = '*';
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var ALL_KEYWORD_2 = 'all';
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var FALSE_KEYWORD_1 = 'false';
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var FALSE_KEYWORD_2 = 'off';
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var TRUE_KEYWORD_1 = 'true';
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var TRUE_KEYWORD_2 = 'on';
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var LIST_VALUE_SEPARATOR = ',';
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var OPTION_SEPARATOR = ';';
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var OPTION_VALUE_SEPARATOR = ':';
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function noop() {}
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function optimizationLevelFrom(source) {
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var level = override(DEFAULTS, {});
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var Zero = OptimizationLevel.Zero;
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var One = OptimizationLevel.One;
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var Two = OptimizationLevel.Two;
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if (undefined === source) {
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delete level[Two];
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return level;
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}
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if (typeof source == 'string') {
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source = parseInt(source);
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}
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if (typeof source == 'number' && source === parseInt(Two)) {
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return level;
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}
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if (typeof source == 'number' && source === parseInt(One)) {
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delete level[Two];
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return level;
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}
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if (typeof source == 'number' && source === parseInt(Zero)) {
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delete level[Two];
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delete level[One];
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return level;
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}
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if (typeof source == 'object') {
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source = covertValuesToHashes(source);
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}
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if (One in source && 'roundingPrecision' in source[One]) {
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source[One].roundingPrecision = roundingPrecisionFrom(source[One].roundingPrecision);
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}
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if (Two in source && 'skipProperties' in source[Two] && typeof(source[Two].skipProperties) == 'string') {
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source[Two].skipProperties = source[Two].skipProperties.split(LIST_VALUE_SEPARATOR);
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}
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if (Zero in source || One in source || Two in source) {
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level[Zero] = override(level[Zero], source[Zero]);
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}
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if (One in source && ALL_KEYWORD_1 in source[One]) {
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level[One] = override(level[One], defaults(One, normalizeValue(source[One][ALL_KEYWORD_1])));
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delete source[One][ALL_KEYWORD_1];
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}
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if (One in source && ALL_KEYWORD_2 in source[One]) {
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level[One] = override(level[One], defaults(One, normalizeValue(source[One][ALL_KEYWORD_2])));
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delete source[One][ALL_KEYWORD_2];
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}
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if (One in source || Two in source) {
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level[One] = override(level[One], source[One]);
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} else {
|
delete level[One];
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}
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if (Two in source && ALL_KEYWORD_1 in source[Two]) {
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level[Two] = override(level[Two], defaults(Two, normalizeValue(source[Two][ALL_KEYWORD_1])));
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delete source[Two][ALL_KEYWORD_1];
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}
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if (Two in source && ALL_KEYWORD_2 in source[Two]) {
|
level[Two] = override(level[Two], defaults(Two, normalizeValue(source[Two][ALL_KEYWORD_2])));
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delete source[Two][ALL_KEYWORD_2];
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}
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if (Two in source) {
|
level[Two] = override(level[Two], source[Two]);
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} else {
|
delete level[Two];
|
}
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|
return level;
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}
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function defaults(level, value) {
|
var options = override(DEFAULTS[level], {});
|
var key;
|
|
for (key in options) {
|
if (typeof options[key] == 'boolean') {
|
options[key] = value;
|
}
|
}
|
|
return options;
|
}
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function normalizeValue(value) {
|
switch (value) {
|
case FALSE_KEYWORD_1:
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case FALSE_KEYWORD_2:
|
return false;
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case TRUE_KEYWORD_1:
|
case TRUE_KEYWORD_2:
|
return true;
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default:
|
return value;
|
}
|
}
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function covertValuesToHashes(source) {
|
var clonedSource = override(source, {});
|
var level;
|
var i;
|
|
for (i = 0; i <= 2; i++) {
|
level = '' + i;
|
|
if (level in clonedSource && (clonedSource[level] === undefined || clonedSource[level] === false)) {
|
delete clonedSource[level];
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}
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|
if (level in clonedSource && clonedSource[level] === true) {
|
clonedSource[level] = {};
|
}
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|
if (level in clonedSource && typeof clonedSource[level] == 'string') {
|
clonedSource[level] = covertToHash(clonedSource[level], level);
|
}
|
}
|
|
return clonedSource;
|
}
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function covertToHash(asString, level) {
|
return asString
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.split(OPTION_SEPARATOR)
|
.reduce(function (accumulator, directive) {
|
var parts = directive.split(OPTION_VALUE_SEPARATOR);
|
var name = parts[0];
|
var value = parts[1];
|
var normalizedValue = normalizeValue(value);
|
|
if (ALL_KEYWORD_1 == name || ALL_KEYWORD_2 == name) {
|
accumulator = override(accumulator, defaults(level, normalizedValue));
|
} else {
|
accumulator[name] = normalizedValue;
|
}
|
|
return accumulator;
|
}, {});
|
}
|
|
module.exports = {
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OptimizationLevel: OptimizationLevel,
|
optimizationLevelFrom: optimizationLevelFrom,
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};
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