You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
445 lines
14 KiB
JavaScript
445 lines
14 KiB
JavaScript
var cleanUpSelectors = require('./clean-up').selectors;
|
|
var cleanUpBlock = require('./clean-up').block;
|
|
var cleanUpAtRule = require('./clean-up').atRule;
|
|
var split = require('../utils/split');
|
|
|
|
var RGB = require('../colors/rgb');
|
|
var HSL = require('../colors/hsl');
|
|
var HexNameShortener = require('../colors/hex-name-shortener');
|
|
|
|
var wrapForOptimizing = require('../properties/wrap-for-optimizing').all;
|
|
var restoreFromOptimizing = require('../properties/restore-from-optimizing');
|
|
var removeUnused = require('../properties/remove-unused');
|
|
|
|
var DEFAULT_ROUNDING_PRECISION = 2;
|
|
var CHARSET_TOKEN = '@charset';
|
|
var CHARSET_REGEXP = new RegExp('^' + CHARSET_TOKEN, 'i');
|
|
|
|
var FONT_NUMERAL_WEIGHTS = ['100', '200', '300', '400', '500', '600', '700', '800', '900'];
|
|
var FONT_NAME_WEIGHTS = ['normal', 'bold', 'bolder', 'lighter'];
|
|
var FONT_NAME_WEIGHTS_WITHOUT_NORMAL = ['bold', 'bolder', 'lighter'];
|
|
|
|
var WHOLE_PIXEL_VALUE = /(?:^|\s|\()(-?\d+)px/;
|
|
var TIME_VALUE = /^(\-?[\d\.]+)(m?s)$/;
|
|
|
|
var valueMinifiers = {
|
|
'background': function (value, index, total) {
|
|
return index === 0 && total == 1 && (value == 'none' || value == 'transparent') ? '0 0' : value;
|
|
},
|
|
'font-weight': function (value) {
|
|
if (value == 'normal')
|
|
return '400';
|
|
else if (value == 'bold')
|
|
return '700';
|
|
else
|
|
return value;
|
|
},
|
|
'outline': function (value, index, total) {
|
|
return index === 0 && total == 1 && value == 'none' ? '0' : value;
|
|
}
|
|
};
|
|
|
|
function isNegative(property, idx) {
|
|
return property.value[idx] && property.value[idx][0][0] == '-' && parseFloat(property.value[idx][0]) < 0;
|
|
}
|
|
|
|
function zeroMinifier(name, value) {
|
|
if (value.indexOf('0') == -1)
|
|
return value;
|
|
|
|
if (value.indexOf('-') > -1) {
|
|
value = value
|
|
.replace(/([^\w\d\-]|^)\-0([^\.]|$)/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 zeroDegMinifier(_, value) {
|
|
if (value.indexOf('0deg') == -1)
|
|
return value;
|
|
|
|
return value.replace(/\(0deg\)/g, '(0)');
|
|
}
|
|
|
|
function whitespaceMinifier(name, value) {
|
|
if (name.indexOf('filter') > -1 || value.indexOf(' ') == -1)
|
|
return value;
|
|
|
|
value = value.replace(/\s+/g, ' ');
|
|
|
|
if (value.indexOf('calc') > -1)
|
|
value = value.replace(/\) ?\/ ?/g, ')/ ');
|
|
|
|
return value
|
|
.replace(/\( /g, '(')
|
|
.replace(/ \)/g, ')')
|
|
.replace(/, /g, ',');
|
|
}
|
|
|
|
function precisionMinifier(_, value, precisionOptions) {
|
|
if (precisionOptions.value === -1 || value.indexOf('.') === -1)
|
|
return value;
|
|
|
|
return value
|
|
.replace(precisionOptions.regexp, function (match, number) {
|
|
return Math.round(parseFloat(number) * precisionOptions.multiplier) / precisionOptions.multiplier + 'px';
|
|
})
|
|
.replace(/(\d)\.($|\D)/g, '$1$2');
|
|
}
|
|
|
|
function unitMinifier(name, value, unitsRegexp) {
|
|
if (/^(?:\-moz\-calc|\-webkit\-calc|calc)\(/.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'))
|
|
return value;
|
|
|
|
return value
|
|
.replace(unitsRegexp, '$1' + '0' + '$2')
|
|
.replace(unitsRegexp, '$1' + '0' + '$2');
|
|
}
|
|
|
|
function multipleZerosMinifier(property) {
|
|
var values = property.value;
|
|
var spliceAt;
|
|
|
|
if (values.length == 4 && values[0][0] === '0' && values[1][0] === '0' && values[2][0] === '0' && values[3][0] === '0') {
|
|
if (property.name.indexOf('box-shadow') > -1)
|
|
spliceAt = 2;
|
|
else
|
|
spliceAt = 1;
|
|
}
|
|
|
|
if (spliceAt) {
|
|
property.value.splice(spliceAt);
|
|
property.dirty = true;
|
|
}
|
|
}
|
|
|
|
function colorMininifier(name, value, compatibility) {
|
|
if (value.indexOf('#') === -1 && value.indexOf('rgb') == -1 && value.indexOf('hsl') == -1)
|
|
return HexNameShortener.shorten(value);
|
|
|
|
value = value
|
|
.replace(/rgb\((\-?\d+),(\-?\d+),(\-?\d+)\)/g, function (match, red, green, blue) {
|
|
return new RGB(red, green, blue).toHex();
|
|
})
|
|
.replace(/hsl\((-?\d+),(-?\d+)%?,(-?\d+)%?\)/g, function (match, hue, saturation, lightness) {
|
|
return new HSL(hue, saturation, lightness).toHex();
|
|
})
|
|
.replace(/(^|[^='"])#([0-9a-f]{6})/gi, function (match, prefix, color) {
|
|
if (color[0] == color[1] && color[2] == color[3] && color[4] == color[5])
|
|
return prefix + '#' + color[0] + color[2] + color[4];
|
|
else
|
|
return prefix + '#' + color;
|
|
})
|
|
.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 HexNameShortener.shorten(value);
|
|
}
|
|
|
|
function pixelLengthMinifier(_, 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 timeUnitMinifier(_, 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 minifyBorderRadius(property) {
|
|
var values = property.value;
|
|
var spliceAt;
|
|
|
|
if (values.length == 3 && values[1][0] == '/' && values[0][0] == values[2][0])
|
|
spliceAt = 1;
|
|
else if (values.length == 5 && values[2][0] == '/' && values[0][0] == values[3][0] && values[1][0] == values[4][0])
|
|
spliceAt = 2;
|
|
else if (values.length == 7 && values[3][0] == '/' && values[0][0] == values[4][0] && values[1][0] == values[5][0] && values[2][0] == values[6][0])
|
|
spliceAt = 3;
|
|
else if (values.length == 9 && values[4][0] == '/' && values[0][0] == values[5][0] && values[1][0] == values[6][0] && values[2][0] == values[7][0] && values[3][0] == values[8][0])
|
|
spliceAt = 4;
|
|
|
|
if (spliceAt) {
|
|
property.value.splice(spliceAt);
|
|
property.dirty = true;
|
|
}
|
|
}
|
|
|
|
function minifyFilter(property) {
|
|
if (property.value.length == 1) {
|
|
property.value[0][0] = property.value[0][0].replace(/progid:DXImageTransform\.Microsoft\.(Alpha|Chroma)(\W)/, function (match, filter, suffix) {
|
|
return filter.toLowerCase() + suffix;
|
|
});
|
|
}
|
|
|
|
property.value[0][0] = property.value[0][0]
|
|
.replace(/,(\S)/g, ', $1')
|
|
.replace(/ ?= ?/g, '=');
|
|
}
|
|
|
|
function minifyFont(property) {
|
|
var values = property.value;
|
|
var hasNumeral = FONT_NUMERAL_WEIGHTS.indexOf(values[0][0]) > -1 ||
|
|
values[1] && FONT_NUMERAL_WEIGHTS.indexOf(values[1][0]) > -1 ||
|
|
values[2] && FONT_NUMERAL_WEIGHTS.indexOf(values[2][0]) > -1;
|
|
|
|
if (hasNumeral)
|
|
return;
|
|
|
|
if (values[1] == '/')
|
|
return;
|
|
|
|
var normalCount = 0;
|
|
if (values[0][0] == 'normal')
|
|
normalCount++;
|
|
if (values[1] && values[1][0] == 'normal')
|
|
normalCount++;
|
|
if (values[2] && values[2][0] == 'normal')
|
|
normalCount++;
|
|
|
|
if (normalCount > 1)
|
|
return;
|
|
|
|
var toOptimize;
|
|
if (FONT_NAME_WEIGHTS_WITHOUT_NORMAL.indexOf(values[0][0]) > -1)
|
|
toOptimize = 0;
|
|
else if (values[1] && FONT_NAME_WEIGHTS_WITHOUT_NORMAL.indexOf(values[1][0]) > -1)
|
|
toOptimize = 1;
|
|
else if (values[2] && FONT_NAME_WEIGHTS_WITHOUT_NORMAL.indexOf(values[2][0]) > -1)
|
|
toOptimize = 2;
|
|
else if (FONT_NAME_WEIGHTS.indexOf(values[0][0]) > -1)
|
|
toOptimize = 0;
|
|
else if (values[1] && FONT_NAME_WEIGHTS.indexOf(values[1][0]) > -1)
|
|
toOptimize = 1;
|
|
else if (values[2] && FONT_NAME_WEIGHTS.indexOf(values[2][0]) > -1)
|
|
toOptimize = 2;
|
|
|
|
if (toOptimize !== undefined) {
|
|
property.value[toOptimize][0] = valueMinifiers['font-weight'](values[toOptimize][0]);
|
|
property.dirty = true;
|
|
}
|
|
}
|
|
|
|
function optimizeBody(properties, options) {
|
|
var property, name, value;
|
|
var _properties = wrapForOptimizing(properties);
|
|
|
|
for (var i = 0, l = _properties.length; i < l; i++) {
|
|
property = _properties[i];
|
|
name = property.name;
|
|
|
|
if (property.hack && (
|
|
(property.hack == 'star' || property.hack == 'underscore') && !options.compatibility.properties.iePrefixHack ||
|
|
property.hack == 'backslash' && !options.compatibility.properties.ieSuffixHack ||
|
|
property.hack == 'bang' && !options.compatibility.properties.ieBangHack))
|
|
property.unused = true;
|
|
|
|
if (name.indexOf('padding') === 0 && (isNegative(property, 0) || isNegative(property, 1) || isNegative(property, 2) || isNegative(property, 3)))
|
|
property.unused = true;
|
|
|
|
if (property.unused)
|
|
continue;
|
|
|
|
if (property.variable) {
|
|
if (property.block)
|
|
optimizeBody(property.value[0], options);
|
|
continue;
|
|
}
|
|
|
|
for (var j = 0, m = property.value.length; j < m; j++) {
|
|
value = property.value[j][0];
|
|
|
|
if (valueMinifiers[name])
|
|
value = valueMinifiers[name](value, j, m);
|
|
|
|
value = whitespaceMinifier(name, value);
|
|
value = precisionMinifier(name, value, options.precision);
|
|
value = pixelLengthMinifier(name, value, options.compatibility);
|
|
value = timeUnitMinifier(name, value);
|
|
value = zeroMinifier(name, value);
|
|
if (options.compatibility.properties.zeroUnits) {
|
|
value = zeroDegMinifier(name, value);
|
|
value = unitMinifier(name, value, options.unitsRegexp);
|
|
}
|
|
if (options.compatibility.properties.colors)
|
|
value = colorMininifier(name, value, options.compatibility);
|
|
|
|
property.value[j][0] = value;
|
|
}
|
|
|
|
multipleZerosMinifier(property);
|
|
|
|
if (name.indexOf('border') === 0 && name.indexOf('radius') > 0)
|
|
minifyBorderRadius(property);
|
|
else if (name == 'filter')
|
|
minifyFilter(property);
|
|
else if (name == 'font')
|
|
minifyFont(property);
|
|
}
|
|
|
|
restoreFromOptimizing(_properties, true);
|
|
removeUnused(_properties);
|
|
}
|
|
|
|
function cleanupCharsets(tokens) {
|
|
var hasCharset = false;
|
|
|
|
for (var i = 0, l = tokens.length; i < l; i++) {
|
|
var token = tokens[i];
|
|
|
|
if (token[0] != 'at-rule')
|
|
continue;
|
|
|
|
if (!CHARSET_REGEXP.test(token[1][0]))
|
|
continue;
|
|
|
|
if (hasCharset || token[1][0].indexOf(CHARSET_TOKEN) == -1) {
|
|
tokens.splice(i, 1);
|
|
i--;
|
|
l--;
|
|
} else {
|
|
hasCharset = true;
|
|
tokens.splice(i, 1);
|
|
tokens.unshift(['at-rule', [token[1][0].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 buildPrecision(options) {
|
|
var precision = {};
|
|
|
|
precision.value = options.roundingPrecision === undefined ?
|
|
DEFAULT_ROUNDING_PRECISION :
|
|
options.roundingPrecision;
|
|
precision.multiplier = Math.pow(10, precision.value);
|
|
precision.regexp = new RegExp('(\\d*\\.\\d{' + (precision.value + 1) + ',})px', 'g');
|
|
|
|
return precision;
|
|
}
|
|
|
|
function optimize(tokens, options) {
|
|
var ie7Hack = options.compatibility.selectors.ie7Hack;
|
|
var adjacentSpace = options.compatibility.selectors.adjacentSpace;
|
|
var spaceAfterClosingBrace = options.compatibility.properties.spaceAfterClosingBrace;
|
|
var mayHaveCharset = false;
|
|
|
|
options.unitsRegexp = buildUnitRegexp(options);
|
|
options.precision = buildPrecision(options);
|
|
|
|
for (var i = 0, l = tokens.length; i < l; i++) {
|
|
var token = tokens[i];
|
|
|
|
switch (token[0]) {
|
|
case 'selector':
|
|
token[1] = cleanUpSelectors(token[1], !ie7Hack, adjacentSpace);
|
|
optimizeBody(token[2], options);
|
|
break;
|
|
case 'block':
|
|
cleanUpBlock(token[1], spaceAfterClosingBrace);
|
|
optimize(token[2], options);
|
|
break;
|
|
case 'flat-block':
|
|
cleanUpBlock(token[1], spaceAfterClosingBrace);
|
|
optimizeBody(token[2], options);
|
|
break;
|
|
case 'at-rule':
|
|
cleanUpAtRule(token[1]);
|
|
mayHaveCharset = true;
|
|
}
|
|
|
|
if (token[1].length === 0 || (token[2] && token[2].length === 0)) {
|
|
tokens.splice(i, 1);
|
|
i--;
|
|
l--;
|
|
}
|
|
}
|
|
|
|
if (mayHaveCharset)
|
|
cleanupCharsets(tokens);
|
|
}
|
|
|
|
module.exports = optimize;
|