diff options
Diffstat (limited to 'node_modules/clean-css/lib/optimizer/level-1/optimize.js')
| -rw-r--r-- | node_modules/clean-css/lib/optimizer/level-1/optimize.js | 676 |
1 files changed, 0 insertions, 676 deletions
diff --git a/node_modules/clean-css/lib/optimizer/level-1/optimize.js b/node_modules/clean-css/lib/optimizer/level-1/optimize.js deleted file mode 100644 index 13cfd8c5..00000000 --- a/node_modules/clean-css/lib/optimizer/level-1/optimize.js +++ /dev/null @@ -1,676 +0,0 @@ -var shortenHex = require('./shorten-hex'); -var shortenHsl = require('./shorten-hsl'); -var shortenRgb = require('./shorten-rgb'); -var sortSelectors = require('./sort-selectors'); -var tidyRules = require('./tidy-rules'); -var tidyBlock = require('./tidy-block'); -var tidyAtRule = require('./tidy-at-rule'); - -var Hack = require('../hack'); -var removeUnused = require('../remove-unused'); -var restoreFromOptimizing = require('../restore-from-optimizing'); -var wrapForOptimizing = require('../wrap-for-optimizing').all; - -var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel; - -var Token = require('../../tokenizer/token'); -var Marker = require('../../tokenizer/marker'); - -var formatPosition = require('../../utils/format-position'); -var split = require('../../utils/split'); - -var serializeRules = require('../../writer/one-time').rules; - -var IgnoreProperty = 'ignore-property'; - -var CHARSET_TOKEN = '@charset'; -var CHARSET_REGEXP = new RegExp('^' + CHARSET_TOKEN, 'i'); - -var DEFAULT_ROUNDING_PRECISION = require('../../options/rounding-precision').DEFAULT; - -var WHOLE_PIXEL_VALUE = /(?:^|\s|\()(-?\d+)px/; -var TIME_VALUE = /^(\-?[\d\.]+)(m?s)$/; - -var HEX_VALUE_PATTERN = /[0-9a-f]/i; -var PROPERTY_NAME_PATTERN = /^(?:\-chrome\-|\-[\w\-]+\w|\w[\w\-]+\w|\-\-\S+)$/; -var IMPORT_PREFIX_PATTERN = /^@import/i; -var QUOTED_PATTERN = /^('.*'|".*")$/; -var QUOTED_BUT_SAFE_PATTERN = /^['"][a-zA-Z][a-zA-Z\d\-_]+['"]$/; -var URL_PREFIX_PATTERN = /^url\(/i; -var VARIABLE_NAME_PATTERN = /^--\S+$/; - -function isNegative(value) { - return value && value[1][0] == '-' && parseFloat(value[1]) < 0; -} - -function isQuoted(value) { - return QUOTED_PATTERN.test(value); -} - -function isUrl(value) { - return URL_PREFIX_PATTERN.test(value); -} - -function normalizeUrl(value) { - return value - .replace(URL_PREFIX_PATTERN, 'url(') - .replace(/\\?\n|\\?\r\n/g, ''); -} - -function optimizeBackground(property) { - var values = property.value; - - if (values.length == 1 && values[0][1] == 'none') { - values[0][1] = '0 0'; - } - - if (values.length == 1 && values[0][1] == 'transparent') { - values[0][1] = '0 0'; - } -} - -function optimizeBorderRadius(property) { - var values = property.value; - var spliceAt; - - if (values.length == 3 && values[1][1] == '/' && values[0][1] == values[2][1]) { - spliceAt = 1; - } else if (values.length == 5 && values[2][1] == '/' && values[0][1] == values[3][1] && values[1][1] == values[4][1]) { - spliceAt = 2; - } else if (values.length == 7 && values[3][1] == '/' && values[0][1] == values[4][1] && values[1][1] == values[5][1] && values[2][1] == values[6][1]) { - spliceAt = 3; - } else if (values.length == 9 && values[4][1] == '/' && values[0][1] == values[5][1] && values[1][1] == values[6][1] && values[2][1] == values[7][1] && values[3][1] == values[8][1]) { - spliceAt = 4; - } - - if (spliceAt) { - property.value.splice(spliceAt); - property.dirty = true; - } -} - -function optimizeColors(name, value, compatibility) { - if (value.indexOf('#') === -1 && value.indexOf('rgb') == -1 && value.indexOf('hsl') == -1) { - return shortenHex(value); - } - - value = value - .replace(/rgb\((\-?\d+),(\-?\d+),(\-?\d+)\)/g, function (match, red, green, blue) { - return shortenRgb(red, green, blue); - }) - .replace(/hsl\((-?\d+),(-?\d+)%?,(-?\d+)%?\)/g, function (match, hue, saturation, lightness) { - return shortenHsl(hue, saturation, lightness); - }) - .replace(/(^|[^='"])#([0-9a-f]{6})/gi, function (match, prefix, color, at, inputValue) { - var suffix = inputValue[at + match.length]; - - if (suffix && HEX_VALUE_PATTERN.test(suffix)) { - return match; - } else if (color[0] == color[1] && color[2] == color[3] && color[4] == color[5]) { - return (prefix + '#' + color[0] + color[2] + color[4]).toLowerCase(); - } else { - return (prefix + '#' + color).toLowerCase(); - } - }) - .replace(/(^|[^='"])#([0-9a-f]{3})/gi, function (match, prefix, color) { - return prefix + '#' + color.toLowerCase(); - }) - .replace(/(rgb|rgba|hsl|hsla)\(([^\)]+)\)/g, function (match, colorFunction, colorDef) { - var tokens = colorDef.split(','); - var applies = (colorFunction == 'hsl' && tokens.length == 3) || - (colorFunction == 'hsla' && tokens.length == 4) || - (colorFunction == 'rgb' && tokens.length == 3 && colorDef.indexOf('%') > 0) || - (colorFunction == 'rgba' && tokens.length == 4 && colorDef.indexOf('%') > 0); - - if (!applies) { - return match; - } - - if (tokens[1].indexOf('%') == -1) { - tokens[1] += '%'; - } - - if (tokens[2].indexOf('%') == -1) { - tokens[2] += '%'; - } - - return colorFunction + '(' + tokens.join(',') + ')'; - }); - - if (compatibility.colors.opacity && name.indexOf('background') == -1) { - value = value.replace(/(?:rgba|hsla)\(0,0%?,0%?,0\)/g, function (match) { - if (split(value, ',').pop().indexOf('gradient(') > -1) { - return match; - } - - return 'transparent'; - }); - } - - return shortenHex(value); -} - -function optimizeFilter(property) { - if (property.value.length == 1) { - property.value[0][1] = property.value[0][1].replace(/progid:DXImageTransform\.Microsoft\.(Alpha|Chroma)(\W)/, function (match, filter, suffix) { - return filter.toLowerCase() + suffix; - }); - } - - property.value[0][1] = property.value[0][1] - .replace(/,(\S)/g, ', $1') - .replace(/ ?= ?/g, '='); -} - -function optimizeFontWeight(property, atIndex) { - var value = property.value[atIndex][1]; - - if (value == 'normal') { - value = '400'; - } else if (value == 'bold') { - value = '700'; - } - - property.value[atIndex][1] = value; -} - -function optimizeMultipleZeros(property) { - var values = property.value; - var spliceAt; - - if (values.length == 4 && values[0][1] === '0' && values[1][1] === '0' && values[2][1] === '0' && values[3][1] === '0') { - if (property.name.indexOf('box-shadow') > -1) { - spliceAt = 2; - } else { - spliceAt = 1; - } - } - - if (spliceAt) { - property.value.splice(spliceAt); - property.dirty = true; - } -} - -function optimizeOutline(property) { - var values = property.value; - - if (values.length == 1 && values[0][1] == 'none') { - values[0][1] = '0'; - } -} - -function optimizePixelLengths(_, value, compatibility) { - if (!WHOLE_PIXEL_VALUE.test(value)) { - return value; - } - - return value.replace(WHOLE_PIXEL_VALUE, function (match, val) { - var newValue; - var intVal = parseInt(val); - - if (intVal === 0) { - return match; - } - - if (compatibility.properties.shorterLengthUnits && compatibility.units.pt && intVal * 3 % 4 === 0) { - newValue = intVal * 3 / 4 + 'pt'; - } - - if (compatibility.properties.shorterLengthUnits && compatibility.units.pc && intVal % 16 === 0) { - newValue = intVal / 16 + 'pc'; - } - - if (compatibility.properties.shorterLengthUnits && compatibility.units.in && intVal % 96 === 0) { - newValue = intVal / 96 + 'in'; - } - - if (newValue) { - newValue = match.substring(0, match.indexOf(val)) + newValue; - } - - return newValue && newValue.length < match.length ? newValue : match; - }); -} - -function optimizePrecision(_, value, precisionOptions) { - if (!precisionOptions.enabled || value.indexOf('.') === -1) { - return value; - } - - return value - .replace(precisionOptions.decimalPointMatcher, '$1$2$3') - .replace(precisionOptions.zeroMatcher, function (match, integerPart, fractionPart, unit) { - var multiplier = precisionOptions.units[unit].multiplier; - var parsedInteger = parseInt(integerPart); - var integer = isNaN(parsedInteger) ? 0 : parsedInteger; - var fraction = parseFloat(fractionPart); - - return Math.round((integer + fraction) * multiplier) / multiplier + unit; - }); -} - -function optimizeTimeUnits(_, value) { - if (!TIME_VALUE.test(value)) - return value; - - return value.replace(TIME_VALUE, function (match, val, unit) { - var newValue; - - if (unit == 'ms') { - newValue = parseInt(val) / 1000 + 's'; - } else if (unit == 's') { - newValue = parseFloat(val) * 1000 + 'ms'; - } - - return newValue.length < match.length ? newValue : match; - }); -} - -function optimizeUnits(name, value, unitsRegexp) { - if (/^(?:\-moz\-calc|\-webkit\-calc|calc|rgb|hsl|rgba|hsla)\(/.test(value)) { - return value; - } - - if (name == 'flex' || name == '-ms-flex' || name == '-webkit-flex' || name == 'flex-basis' || name == '-webkit-flex-basis') { - return value; - } - - if (value.indexOf('%') > 0 && (name == 'height' || name == 'max-height' || name == 'width' || name == 'max-width')) { - return value; - } - - return value - .replace(unitsRegexp, '$1' + '0' + '$2') - .replace(unitsRegexp, '$1' + '0' + '$2'); -} - -function optimizeWhitespace(name, value) { - if (name.indexOf('filter') > -1 || value.indexOf(' ') == -1 || value.indexOf('expression') === 0) { - return value; - } - - if (value.indexOf(Marker.SINGLE_QUOTE) > -1 || value.indexOf(Marker.DOUBLE_QUOTE) > -1) { - return value; - } - - value = value.replace(/\s+/g, ' '); - - if (value.indexOf('calc') > -1) { - value = value.replace(/\) ?\/ ?/g, ')/ '); - } - - return value - .replace(/(\(;?)\s+/g, '$1') - .replace(/\s+(;?\))/g, '$1') - .replace(/, /g, ','); -} - -function optimizeZeroDegUnit(_, value) { - if (value.indexOf('0deg') == -1) { - return value; - } - - return value.replace(/\(0deg\)/g, '(0)'); -} - -function optimizeZeroUnits(name, value) { - if (value.indexOf('0') == -1) { - return value; - } - - if (value.indexOf('-') > -1) { - value = value - .replace(/([^\w\d\-]|^)\-0([^\.]|$)/g, '$10$2') - .replace(/([^\w\d\-]|^)\-0([^\.]|$)/g, '$10$2'); - } - - return value - .replace(/(^|\s)0+([1-9])/g, '$1$2') - .replace(/(^|\D)\.0+(\D|$)/g, '$10$2') - .replace(/(^|\D)\.0+(\D|$)/g, '$10$2') - .replace(/\.([1-9]*)0+(\D|$)/g, function (match, nonZeroPart, suffix) { - return (nonZeroPart.length > 0 ? '.' : '') + nonZeroPart + suffix; - }) - .replace(/(^|\D)0\.(\d)/g, '$1.$2'); -} - -function removeQuotes(name, value) { - if (name == 'content' || name.indexOf('font-variation-settings') > -1 || name.indexOf('font-feature-settings') > -1 || name.indexOf('grid-') > -1) { - return value; - } - - return QUOTED_BUT_SAFE_PATTERN.test(value) ? - value.substring(1, value.length - 1) : - value; -} - -function removeUrlQuotes(value) { - return /^url\(['"].+['"]\)$/.test(value) && !/^url\(['"].*[\*\s\(\)'"].*['"]\)$/.test(value) && !/^url\(['"]data:[^;]+;charset/.test(value) ? - value.replace(/["']/g, '') : - value; -} - -function transformValue(propertyName, propertyValue, rule, transformCallback) { - var selector = serializeRules(rule); - var transformedValue = transformCallback(propertyName, propertyValue, selector); - - if (transformedValue === undefined) { - return propertyValue; - } else if (transformedValue === false) { - return IgnoreProperty; - } else { - return transformedValue; - } -} - -// - -function optimizeBody(rule, properties, context) { - var options = context.options; - var levelOptions = options.level[OptimizationLevel.One]; - var property, name, type, value; - var valueIsUrl; - var propertyToken; - var _properties = wrapForOptimizing(properties, true); - - propertyLoop: - for (var i = 0, l = _properties.length; i < l; i++) { - property = _properties[i]; - name = property.name; - - if (!PROPERTY_NAME_PATTERN.test(name)) { - propertyToken = property.all[property.position]; - context.warnings.push('Invalid property name \'' + name + '\' at ' + formatPosition(propertyToken[1][2][0]) + '. Ignoring.'); - property.unused = true; - } - - if (property.value.length === 0) { - propertyToken = property.all[property.position]; - context.warnings.push('Empty property \'' + name + '\' at ' + formatPosition(propertyToken[1][2][0]) + '. Ignoring.'); - property.unused = true; - } - - if (property.hack && ( - (property.hack[0] == Hack.ASTERISK || property.hack[0] == Hack.UNDERSCORE) && !options.compatibility.properties.iePrefixHack || - property.hack[0] == Hack.BACKSLASH && !options.compatibility.properties.ieSuffixHack || - property.hack[0] == Hack.BANG && !options.compatibility.properties.ieBangHack)) { - property.unused = true; - } - - if (levelOptions.removeNegativePaddings && name.indexOf('padding') === 0 && (isNegative(property.value[0]) || isNegative(property.value[1]) || isNegative(property.value[2]) || isNegative(property.value[3]))) { - property.unused = true; - } - - if (!options.compatibility.properties.ieFilters && isLegacyFilter(property)) { - property.unused = true; - } - - if (property.unused) { - continue; - } - - if (property.block) { - optimizeBody(rule, property.value[0][1], context); - continue; - } - - if (VARIABLE_NAME_PATTERN.test(name)) { - continue; - } - - for (var j = 0, m = property.value.length; j < m; j++) { - type = property.value[j][0]; - value = property.value[j][1]; - valueIsUrl = isUrl(value); - - if (type == Token.PROPERTY_BLOCK) { - property.unused = true; - context.warnings.push('Invalid value token at ' + formatPosition(value[0][1][2][0]) + '. Ignoring.'); - break; - } - - if (valueIsUrl && !context.validator.isUrl(value)) { - property.unused = true; - context.warnings.push('Broken URL \'' + value + '\' at ' + formatPosition(property.value[j][2][0]) + '. Ignoring.'); - break; - } - - if (valueIsUrl) { - value = levelOptions.normalizeUrls ? - normalizeUrl(value) : - value; - value = !options.compatibility.properties.urlQuotes ? - removeUrlQuotes(value) : - value; - } else if (isQuoted(value)) { - value = levelOptions.removeQuotes ? - removeQuotes(name, value) : - value; - } else { - value = levelOptions.removeWhitespace ? - optimizeWhitespace(name, value) : - value; - value = optimizePrecision(name, value, options.precision); - value = optimizePixelLengths(name, value, options.compatibility); - value = levelOptions.replaceTimeUnits ? - optimizeTimeUnits(name, value) : - value; - value = levelOptions.replaceZeroUnits ? - optimizeZeroUnits(name, value) : - value; - - if (options.compatibility.properties.zeroUnits) { - value = optimizeZeroDegUnit(name, value); - value = optimizeUnits(name, value, options.unitsRegexp); - } - - if (options.compatibility.properties.colors) { - value = optimizeColors(name, value, options.compatibility); - } - } - - value = transformValue(name, value, rule, levelOptions.transform); - - if (value === IgnoreProperty) { - property.unused = true; - continue propertyLoop; - } - - property.value[j][1] = value; - } - - if (levelOptions.replaceMultipleZeros) { - optimizeMultipleZeros(property); - } - - if (name == 'background' && levelOptions.optimizeBackground) { - optimizeBackground(property); - } else if (name.indexOf('border') === 0 && name.indexOf('radius') > 0 && levelOptions.optimizeBorderRadius) { - optimizeBorderRadius(property); - } else if (name == 'filter'&& levelOptions.optimizeFilter && options.compatibility.properties.ieFilters) { - optimizeFilter(property); - } else if (name == 'font-weight' && levelOptions.optimizeFontWeight) { - optimizeFontWeight(property, 0); - } else if (name == 'outline' && levelOptions.optimizeOutline) { - optimizeOutline(property); - } - } - - restoreFromOptimizing(_properties); - removeUnused(_properties); - removeComments(properties, options); -} - -function removeComments(tokens, options) { - var token; - var i; - - for (i = 0; i < tokens.length; i++) { - token = tokens[i]; - - if (token[0] != Token.COMMENT) { - continue; - } - - optimizeComment(token, options); - - if (token[1].length === 0) { - tokens.splice(i, 1); - i--; - } - } -} - -function optimizeComment(token, options) { - if (token[1][2] == Marker.EXCLAMATION && (options.level[OptimizationLevel.One].specialComments == 'all' || options.commentsKept < options.level[OptimizationLevel.One].specialComments)) { - options.commentsKept++; - return; - } - - token[1] = []; -} - -function cleanupCharsets(tokens) { - var hasCharset = false; - - for (var i = 0, l = tokens.length; i < l; i++) { - var token = tokens[i]; - - if (token[0] != Token.AT_RULE) - continue; - - if (!CHARSET_REGEXP.test(token[1])) - continue; - - if (hasCharset || token[1].indexOf(CHARSET_TOKEN) == -1) { - tokens.splice(i, 1); - i--; - l--; - } else { - hasCharset = true; - tokens.splice(i, 1); - tokens.unshift([Token.AT_RULE, token[1].replace(CHARSET_REGEXP, CHARSET_TOKEN)]); - } - } -} - -function buildUnitRegexp(options) { - var units = ['px', 'em', 'ex', 'cm', 'mm', 'in', 'pt', 'pc', '%']; - var otherUnits = ['ch', 'rem', 'vh', 'vm', 'vmax', 'vmin', 'vw']; - - otherUnits.forEach(function (unit) { - if (options.compatibility.units[unit]) { - units.push(unit); - } - }); - - return new RegExp('(^|\\s|\\(|,)0(?:' + units.join('|') + ')(\\W|$)', 'g'); -} - -function buildPrecisionOptions(roundingPrecision) { - var precisionOptions = { - matcher: null, - units: {}, - }; - var optimizable = []; - var unit; - var value; - - for (unit in roundingPrecision) { - value = roundingPrecision[unit]; - - if (value != DEFAULT_ROUNDING_PRECISION) { - precisionOptions.units[unit] = {}; - precisionOptions.units[unit].value = value; - precisionOptions.units[unit].multiplier = Math.pow(10, value); - - optimizable.push(unit); - } - } - - if (optimizable.length > 0) { - precisionOptions.enabled = true; - precisionOptions.decimalPointMatcher = new RegExp('(\\d)\\.($|' + optimizable.join('|') + ')($|\W)', 'g'); - precisionOptions.zeroMatcher = new RegExp('(\\d*)(\\.\\d+)(' + optimizable.join('|') + ')', 'g'); - } - - return precisionOptions; -} - -function isImport(token) { - return IMPORT_PREFIX_PATTERN.test(token[1]); -} - -function isLegacyFilter(property) { - var value; - - if (property.name == 'filter' || property.name == '-ms-filter') { - value = property.value[0][1]; - - return value.indexOf('progid') > -1 || - value.indexOf('alpha') === 0 || - value.indexOf('chroma') === 0; - } else { - return false; - } -} - -function level1Optimize(tokens, context) { - var options = context.options; - var levelOptions = options.level[OptimizationLevel.One]; - var ie7Hack = options.compatibility.selectors.ie7Hack; - var adjacentSpace = options.compatibility.selectors.adjacentSpace; - var spaceAfterClosingBrace = options.compatibility.properties.spaceAfterClosingBrace; - var format = options.format; - var mayHaveCharset = false; - var afterRules = false; - - options.unitsRegexp = options.unitsRegexp || buildUnitRegexp(options); - options.precision = options.precision || buildPrecisionOptions(levelOptions.roundingPrecision); - options.commentsKept = options.commentsKept || 0; - - for (var i = 0, l = tokens.length; i < l; i++) { - var token = tokens[i]; - - switch (token[0]) { - case Token.AT_RULE: - token[1] = isImport(token) && afterRules ? '' : token[1]; - token[1] = levelOptions.tidyAtRules ? tidyAtRule(token[1]) : token[1]; - mayHaveCharset = true; - break; - case Token.AT_RULE_BLOCK: - optimizeBody(token[1], token[2], context); - afterRules = true; - break; - case Token.NESTED_BLOCK: - token[1] = levelOptions.tidyBlockScopes ? tidyBlock(token[1], spaceAfterClosingBrace) : token[1]; - level1Optimize(token[2], context); - afterRules = true; - break; - case Token.COMMENT: - optimizeComment(token, options); - break; - case Token.RULE: - token[1] = levelOptions.tidySelectors ? tidyRules(token[1], !ie7Hack, adjacentSpace, format, context.warnings) : token[1]; - token[1] = token[1].length > 1 ? sortSelectors(token[1], levelOptions.selectorsSortingMethod) : token[1]; - optimizeBody(token[1], token[2], context); - afterRules = true; - break; - } - - if (token[0] == Token.COMMENT && token[1].length === 0 || levelOptions.removeEmpty && (token[1].length === 0 || (token[2] && token[2].length === 0))) { - tokens.splice(i, 1); - i--; - l--; - } - } - - if (levelOptions.cleanupCharsets && mayHaveCharset) { - cleanupCharsets(tokens); - } - - return tokens; -} - -module.exports = level1Optimize; |