clear
This commit is contained in:
sentsin
215
node_modules/clean-css/lib/properties/optimizer.js
generated
vendored
Normal file
215
node_modules/clean-css/lib/properties/optimizer.js
generated
vendored
Normal file
@@ -0,0 +1,215 @@
|
||||
var compactable = require('./compactable');
|
||||
var wrapForOptimizing = require('./wrap-for-optimizing').all;
|
||||
var populateComponents = require('./populate-components');
|
||||
var compactOverrides = require('./override-compactor');
|
||||
var compactShorthands = require('./shorthand-compactor');
|
||||
var removeUnused = require('./remove-unused');
|
||||
var restoreFromOptimizing = require('./restore-from-optimizing');
|
||||
var stringifyProperty = require('../stringifier/one-time').property;
|
||||
|
||||
var shorthands = {
|
||||
'animation-delay': ['animation'],
|
||||
'animation-direction': ['animation'],
|
||||
'animation-duration': ['animation'],
|
||||
'animation-fill-mode': ['animation'],
|
||||
'animation-iteration-count': ['animation'],
|
||||
'animation-name': ['animation'],
|
||||
'animation-play-state': ['animation'],
|
||||
'animation-timing-function': ['animation'],
|
||||
'-moz-animation-delay': ['-moz-animation'],
|
||||
'-moz-animation-direction': ['-moz-animation'],
|
||||
'-moz-animation-duration': ['-moz-animation'],
|
||||
'-moz-animation-fill-mode': ['-moz-animation'],
|
||||
'-moz-animation-iteration-count': ['-moz-animation'],
|
||||
'-moz-animation-name': ['-moz-animation'],
|
||||
'-moz-animation-play-state': ['-moz-animation'],
|
||||
'-moz-animation-timing-function': ['-moz-animation'],
|
||||
'-o-animation-delay': ['-o-animation'],
|
||||
'-o-animation-direction': ['-o-animation'],
|
||||
'-o-animation-duration': ['-o-animation'],
|
||||
'-o-animation-fill-mode': ['-o-animation'],
|
||||
'-o-animation-iteration-count': ['-o-animation'],
|
||||
'-o-animation-name': ['-o-animation'],
|
||||
'-o-animation-play-state': ['-o-animation'],
|
||||
'-o-animation-timing-function': ['-o-animation'],
|
||||
'-webkit-animation-delay': ['-webkit-animation'],
|
||||
'-webkit-animation-direction': ['-webkit-animation'],
|
||||
'-webkit-animation-duration': ['-webkit-animation'],
|
||||
'-webkit-animation-fill-mode': ['-webkit-animation'],
|
||||
'-webkit-animation-iteration-count': ['-webkit-animation'],
|
||||
'-webkit-animation-name': ['-webkit-animation'],
|
||||
'-webkit-animation-play-state': ['-webkit-animation'],
|
||||
'-webkit-animation-timing-function': ['-webkit-animation'],
|
||||
'border-color': ['border'],
|
||||
'border-style': ['border'],
|
||||
'border-width': ['border'],
|
||||
'border-bottom': ['border'],
|
||||
'border-bottom-color': ['border-bottom', 'border-color', 'border'],
|
||||
'border-bottom-style': ['border-bottom', 'border-style', 'border'],
|
||||
'border-bottom-width': ['border-bottom', 'border-width', 'border'],
|
||||
'border-left': ['border'],
|
||||
'border-left-color': ['border-left', 'border-color', 'border'],
|
||||
'border-left-style': ['border-left', 'border-style', 'border'],
|
||||
'border-left-width': ['border-left', 'border-width', 'border'],
|
||||
'border-right': ['border'],
|
||||
'border-right-color': ['border-right', 'border-color', 'border'],
|
||||
'border-right-style': ['border-right', 'border-style', 'border'],
|
||||
'border-right-width': ['border-right', 'border-width', 'border'],
|
||||
'border-top': ['border'],
|
||||
'border-top-color': ['border-top', 'border-color', 'border'],
|
||||
'border-top-style': ['border-top', 'border-style', 'border'],
|
||||
'border-top-width': ['border-top', 'border-width', 'border'],
|
||||
'font-family': ['font'],
|
||||
'font-size': ['font'],
|
||||
'font-style': ['font'],
|
||||
'font-variant': ['font'],
|
||||
'font-weight': ['font'],
|
||||
'transition-delay': ['transition'],
|
||||
'transition-duration': ['transition'],
|
||||
'transition-property': ['transition'],
|
||||
'transition-timing-function': ['transition'],
|
||||
'-moz-transition-delay': ['-moz-transition'],
|
||||
'-moz-transition-duration': ['-moz-transition'],
|
||||
'-moz-transition-property': ['-moz-transition'],
|
||||
'-moz-transition-timing-function': ['-moz-transition'],
|
||||
'-o-transition-delay': ['-o-transition'],
|
||||
'-o-transition-duration': ['-o-transition'],
|
||||
'-o-transition-property': ['-o-transition'],
|
||||
'-o-transition-timing-function': ['-o-transition'],
|
||||
'-webkit-transition-delay': ['-webkit-transition'],
|
||||
'-webkit-transition-duration': ['-webkit-transition'],
|
||||
'-webkit-transition-property': ['-webkit-transition'],
|
||||
'-webkit-transition-timing-function': ['-webkit-transition']
|
||||
};
|
||||
|
||||
function _optimize(properties, mergeAdjacent, aggressiveMerging, validator) {
|
||||
var overrideMapping = {};
|
||||
var lastName = null;
|
||||
var lastProperty;
|
||||
var j;
|
||||
|
||||
function mergeablePosition(position) {
|
||||
if (mergeAdjacent === false || mergeAdjacent === true)
|
||||
return mergeAdjacent;
|
||||
|
||||
return mergeAdjacent.indexOf(position) > -1;
|
||||
}
|
||||
|
||||
function sameValue(position) {
|
||||
var left = properties[position - 1];
|
||||
var right = properties[position];
|
||||
|
||||
return stringifyProperty(left.all, left.position) == stringifyProperty(right.all, right.position);
|
||||
}
|
||||
|
||||
propertyLoop:
|
||||
for (var position = 0, total = properties.length; position < total; position++) {
|
||||
var property = properties[position];
|
||||
var _name = (property.name == '-ms-filter' || property.name == 'filter') ?
|
||||
(lastName == 'background' || lastName == 'background-image' ? lastName : property.name) :
|
||||
property.name;
|
||||
var isImportant = property.important;
|
||||
var isHack = property.hack;
|
||||
|
||||
if (property.unused)
|
||||
continue;
|
||||
|
||||
if (position > 0 && lastProperty && _name == lastName && isImportant == lastProperty.important && isHack == lastProperty.hack && sameValue(position) && !lastProperty.unused) {
|
||||
property.unused = true;
|
||||
continue;
|
||||
}
|
||||
|
||||
// comment is necessary - we assume that if two properties are one after another
|
||||
// then it is intentional way of redefining property which may not be widely supported
|
||||
// e.g. a{display:inline-block;display:-moz-inline-box}
|
||||
// however if `mergeablePosition` yields true then the rule does not apply
|
||||
// (e.g merging two adjacent selectors: `a{display:block}a{display:block}`)
|
||||
if (_name in overrideMapping && (aggressiveMerging && _name != lastName || mergeablePosition(position))) {
|
||||
var toOverridePositions = overrideMapping[_name];
|
||||
var canOverride = compactable[_name] && compactable[_name].canOverride;
|
||||
var anyRemoved = false;
|
||||
|
||||
for (j = toOverridePositions.length - 1; j >= 0; j--) {
|
||||
var toRemove = properties[toOverridePositions[j]];
|
||||
var longhandToShorthand = toRemove.name != _name;
|
||||
var wasImportant = toRemove.important;
|
||||
var wasHack = toRemove.hack;
|
||||
|
||||
if (toRemove.unused)
|
||||
continue;
|
||||
|
||||
if (longhandToShorthand && wasImportant)
|
||||
continue;
|
||||
|
||||
if (!wasImportant && (wasHack && !isHack || !wasHack && isHack))
|
||||
continue;
|
||||
|
||||
if (wasImportant && (isHack == 'star' || isHack == 'underscore'))
|
||||
continue;
|
||||
|
||||
if (!wasHack && !isHack && !longhandToShorthand && canOverride && !canOverride(toRemove, property, validator))
|
||||
continue;
|
||||
|
||||
if (wasImportant && !isImportant || wasImportant && isHack) {
|
||||
property.unused = true;
|
||||
lastProperty = property;
|
||||
continue propertyLoop;
|
||||
} else {
|
||||
anyRemoved = true;
|
||||
toRemove.unused = true;
|
||||
}
|
||||
}
|
||||
|
||||
if (anyRemoved) {
|
||||
position = -1;
|
||||
lastProperty = null;
|
||||
lastName = null;
|
||||
overrideMapping = {};
|
||||
continue;
|
||||
}
|
||||
} else {
|
||||
overrideMapping[_name] = overrideMapping[_name] || [];
|
||||
overrideMapping[_name].push(position);
|
||||
|
||||
// TODO: to be removed with
|
||||
// certain shorthand (see values of `shorthands`) should trigger removal of
|
||||
// longhand properties (see keys of `shorthands`)
|
||||
var _shorthands = shorthands[_name];
|
||||
if (_shorthands) {
|
||||
for (j = _shorthands.length - 1; j >= 0; j--) {
|
||||
var shorthand = _shorthands[j];
|
||||
overrideMapping[shorthand] = overrideMapping[shorthand] || [];
|
||||
overrideMapping[shorthand].push(position);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
lastName = _name;
|
||||
lastProperty = property;
|
||||
}
|
||||
}
|
||||
|
||||
function optimize(selector, properties, mergeAdjacent, withCompacting, options, context) {
|
||||
var validator = context.validator;
|
||||
var warnings = context.warnings;
|
||||
|
||||
var _properties = wrapForOptimizing(properties);
|
||||
populateComponents(_properties, validator, warnings);
|
||||
_optimize(_properties, mergeAdjacent, options.aggressiveMerging, validator);
|
||||
|
||||
for (var i = 0, l = _properties.length; i < l; i++) {
|
||||
var _property = _properties[i];
|
||||
if (_property.variable && _property.block)
|
||||
optimize(selector, _property.value[0], mergeAdjacent, withCompacting, options, context);
|
||||
}
|
||||
|
||||
if (withCompacting && options.shorthandCompacting) {
|
||||
compactOverrides(_properties, options.compatibility, validator);
|
||||
compactShorthands(_properties, options.sourceMap, validator);
|
||||
}
|
||||
|
||||
restoreFromOptimizing(_properties);
|
||||
removeUnused(_properties);
|
||||
}
|
||||
|
||||
module.exports = optimize;
|
||||
Reference in New Issue
Block a user