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This commit is contained in:
hatuhn
2019-09-13 09:45:04 +07:00
parent f14a34ba19
commit 558fb07261
16790 changed files with 0 additions and 1642370 deletions
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48
node_modules/csso/lib/compressor/restructure/1-initialMergeRuleset.js generated vendored
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var utils = require('./utils.js');
var walkRules = require('../../utils/walk.js').rules;
function processRuleset(node, item, list) {
var selectors = node.selector.selectors;
var declarations = node.block.declarations;
list.prevUntil(item.prev, function(prev) {
// skip non-ruleset node if safe
if (prev.type !== 'Ruleset') {
return utils.unsafeToSkipNode.call(selectors, prev);
}
var prevSelectors = prev.selector.selectors;
var prevDeclarations = prev.block.declarations;
// try to join rulesets with equal pseudo signature
if (node.pseudoSignature === prev.pseudoSignature) {
// try to join by selectors
if (utils.isEqualLists(prevSelectors, selectors)) {
prevDeclarations.appendList(declarations);
list.remove(item);
return true;
}
// try to join by declarations
if (utils.isEqualDeclarations(declarations, prevDeclarations)) {
utils.addSelectors(prevSelectors, selectors);
list.remove(item);
return true;
}
}
// go to prev ruleset if has no selector similarities
return utils.hasSimilarSelectors(selectors, prevSelectors);
});
};
// NOTE: direction should be left to right, since rulesets merge to left
// ruleset. When direction right to left unmerged rulesets may prevent lookup
// TODO: remove initial merge
module.exports = function initialMergeRuleset(ast) {
walkRules(ast, function(node, item, list) {
if (node.type === 'Ruleset') {
processRuleset(node, item, list);
}
});
};

35
node_modules/csso/lib/compressor/restructure/2-mergeAtrule.js generated vendored
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@@ -1,35 +0,0 @@
var walkRulesRight = require('../../utils/walk.js').rulesRight;
function isMediaRule(node) {
return node.type === 'Atrule' && node.name === 'media';
}
function processAtrule(node, item, list) {
if (!isMediaRule(node)) {
return;
}
var prev = item.prev && item.prev.data;
if (!prev || !isMediaRule(prev)) {
return;
}
// merge @media with same query
if (node.expression.id === prev.expression.id) {
prev.block.rules.appendList(node.block.rules);
prev.info = {
primary: prev.info,
merged: node.info
};
list.remove(item);
}
};
module.exports = function rejoinAtrule(ast) {
walkRulesRight(ast, function(node, item, list) {
if (node.type === 'Atrule') {
processAtrule(node, item, list);
}
});
};

42
node_modules/csso/lib/compressor/restructure/3-disjoinRuleset.js generated vendored
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@@ -1,42 +0,0 @@
var List = require('../../utils/list.js');
var walkRulesRight = require('../../utils/walk.js').rulesRight;
function processRuleset(node, item, list) {
var selectors = node.selector.selectors;
// generate new rule sets:
// .a, .b { color: red; }
// ->
// .a { color: red; }
// .b { color: red; }
// while there are more than 1 simple selector split for rulesets
while (selectors.head !== selectors.tail) {
var newSelectors = new List();
newSelectors.insert(selectors.remove(selectors.head));
list.insert(list.createItem({
type: 'Ruleset',
info: node.info,
pseudoSignature: node.pseudoSignature,
selector: {
type: 'Selector',
info: node.selector.info,
selectors: newSelectors
},
block: {
type: 'Block',
info: node.block.info,
declarations: node.block.declarations.copy()
}
}), item);
}
};
module.exports = function disjoinRuleset(ast) {
walkRulesRight(ast, function(node, item, list) {
if (node.type === 'Ruleset') {
processRuleset(node, item, list);
}
});
};

430
node_modules/csso/lib/compressor/restructure/4-restructShorthand.js generated vendored
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@@ -1,430 +0,0 @@
var List = require('../../utils/list.js');
var translate = require('../../utils/translate.js');
var walkRulesRight = require('../../utils/walk.js').rulesRight;
var REPLACE = 1;
var REMOVE = 2;
var TOP = 0;
var RIGHT = 1;
var BOTTOM = 2;
var LEFT = 3;
var SIDES = ['top', 'right', 'bottom', 'left'];
var SIDE = {
'margin-top': 'top',
'margin-right': 'right',
'margin-bottom': 'bottom',
'margin-left': 'left',
'padding-top': 'top',
'padding-right': 'right',
'padding-bottom': 'bottom',
'padding-left': 'left',
'border-top-color': 'top',
'border-right-color': 'right',
'border-bottom-color': 'bottom',
'border-left-color': 'left',
'border-top-width': 'top',
'border-right-width': 'right',
'border-bottom-width': 'bottom',
'border-left-width': 'left',
'border-top-style': 'top',
'border-right-style': 'right',
'border-bottom-style': 'bottom',
'border-left-style': 'left'
};
var MAIN_PROPERTY = {
'margin': 'margin',
'margin-top': 'margin',
'margin-right': 'margin',
'margin-bottom': 'margin',
'margin-left': 'margin',
'padding': 'padding',
'padding-top': 'padding',
'padding-right': 'padding',
'padding-bottom': 'padding',
'padding-left': 'padding',
'border-color': 'border-color',
'border-top-color': 'border-color',
'border-right-color': 'border-color',
'border-bottom-color': 'border-color',
'border-left-color': 'border-color',
'border-width': 'border-width',
'border-top-width': 'border-width',
'border-right-width': 'border-width',
'border-bottom-width': 'border-width',
'border-left-width': 'border-width',
'border-style': 'border-style',
'border-top-style': 'border-style',
'border-right-style': 'border-style',
'border-bottom-style': 'border-style',
'border-left-style': 'border-style'
};
function TRBL(name) {
this.name = name;
this.info = null;
this.iehack = undefined;
this.sides = {
'top': null,
'right': null,
'bottom': null,
'left': null
};
}
TRBL.prototype.getValueSequence = function(value, count) {
var values = [];
var iehack = '';
var hasBadValues = value.sequence.some(function(child) {
var special = false;
switch (child.type) {
case 'Identifier':
switch (child.name) {
case '\\0':
case '\\9':
iehack = child.name;
return;
case 'inherit':
case 'initial':
case 'unset':
case 'revert':
special = child.name;
break;
}
break;
case 'Dimension':
switch (child.unit) {
// is not supported until IE11
case 'rem':
// v* units is too buggy across browsers and better
// don't merge values with those units
case 'vw':
case 'vh':
case 'vmin':
case 'vmax':
case 'vm': // IE9 supporting "vm" instead of "vmin".
special = child.unit;
break;
}
break;
case 'Hash': // color
case 'Number':
case 'Percentage':
break;
case 'Function':
special = child.name;
break;
case 'Space':
return false; // ignore space
default:
return true; // bad value
}
values.push({
node: child,
special: special,
important: value.important
});
});
if (hasBadValues || values.length > count) {
return false;
}
if (typeof this.iehack === 'string' && this.iehack !== iehack) {
return false;
}
this.iehack = iehack; // move outside
return values;
};
TRBL.prototype.canOverride = function(side, value) {
var currentValue = this.sides[side];
return !currentValue || (value.important && !currentValue.important);
};
TRBL.prototype.add = function(name, value, info) {
function attemptToAdd() {
var sides = this.sides;
var side = SIDE[name];
if (side) {
if (side in sides === false) {
return false;
}
var values = this.getValueSequence(value, 1);
if (!values || !values.length) {
return false;
}
// can mix only if specials are equal
for (var key in sides) {
if (sides[key] !== null && sides[key].special !== values[0].special) {
return false;
}
}
if (!this.canOverride(side, values[0])) {
return true;
}
sides[side] = values[0];
return true;
} else if (name === this.name) {
var values = this.getValueSequence(value, 4);
if (!values || !values.length) {
return false;
}
switch (values.length) {
case 1:
values[RIGHT] = values[TOP];
values[BOTTOM] = values[TOP];
values[LEFT] = values[TOP];
break;
case 2:
values[BOTTOM] = values[TOP];
values[LEFT] = values[RIGHT];
break;
case 3:
values[LEFT] = values[RIGHT];
break;
}
// can mix only if specials are equal
for (var i = 0; i < 4; i++) {
for (var key in sides) {
if (sides[key] !== null && sides[key].special !== values[i].special) {
return false;
}
}
}
for (var i = 0; i < 4; i++) {
if (this.canOverride(SIDES[i], values[i])) {
sides[SIDES[i]] = values[i];
}
}
return true;
}
}
if (!attemptToAdd.call(this)) {
return false;
}
if (this.info) {
this.info = {
primary: this.info,
merged: info
};
} else {
this.info = info;
}
return true;
};
TRBL.prototype.isOkToMinimize = function() {
var top = this.sides.top;
var right = this.sides.right;
var bottom = this.sides.bottom;
var left = this.sides.left;
if (top && right && bottom && left) {
var important =
top.important +
right.important +
bottom.important +
left.important;
return important === 0 || important === 4;
}
return false;
};
TRBL.prototype.getValue = function() {
var result = [];
var sides = this.sides;
var values = [
sides.top,
sides.right,
sides.bottom,
sides.left
];
var stringValues = [
translate(sides.top.node),
translate(sides.right.node),
translate(sides.bottom.node),
translate(sides.left.node)
];
if (stringValues[LEFT] === stringValues[RIGHT]) {
values.pop();
if (stringValues[BOTTOM] === stringValues[TOP]) {
values.pop();
if (stringValues[RIGHT] === stringValues[TOP]) {
values.pop();
}
}
}
for (var i = 0; i < values.length; i++) {
if (i) {
result.push({ type: 'Space' });
}
result.push(values[i].node);
}
if (this.iehack) {
result.push({ type: 'Space' }, {
type: 'Identifier',
info: {},
name: this.iehack
});
}
return {
type: 'Value',
info: {},
important: sides.top.important,
sequence: new List(result)
};
};
TRBL.prototype.getProperty = function() {
return {
type: 'Property',
info: {},
name: this.name
};
};
function processRuleset(ruleset, shorts, shortDeclarations, lastShortSelector) {
var declarations = ruleset.block.declarations;
var selector = ruleset.selector.selectors.first().id;
ruleset.block.declarations.eachRight(function(declaration, item) {
var property = declaration.property.name;
if (!MAIN_PROPERTY.hasOwnProperty(property)) {
return;
}
var key = MAIN_PROPERTY[property];
var shorthand;
var operation;
if (!lastShortSelector || selector === lastShortSelector) {
if (key in shorts) {
operation = REMOVE;
shorthand = shorts[key];
}
}
if (!shorthand || !shorthand.add(property, declaration.value, declaration.info)) {
operation = REPLACE;
shorthand = new TRBL(key);
// if can't parse value ignore it and break shorthand sequence
if (!shorthand.add(property, declaration.value, declaration.info)) {
lastShortSelector = null;
return;
}
}
shorts[key] = shorthand;
shortDeclarations.push({
operation: operation,
block: declarations,
item: item,
shorthand: shorthand
});
lastShortSelector = selector;
});
return lastShortSelector;
};
function processShorthands(shortDeclarations, markDeclaration) {
shortDeclarations.forEach(function(item) {
var shorthand = item.shorthand;
if (!shorthand.isOkToMinimize()) {
return;
}
if (item.operation === REPLACE) {
item.item.data = markDeclaration({
type: 'Declaration',
info: shorthand.info,
property: shorthand.getProperty(),
value: shorthand.getValue(),
id: 0,
length: 0,
fingerprint: null
});
} else {
item.block.remove(item.item);
}
});
};
module.exports = function restructBlock(ast, indexer) {
var stylesheetMap = {};
var shortDeclarations = [];
walkRulesRight(ast, function(node) {
if (node.type !== 'Ruleset') {
return;
}
var stylesheet = this.stylesheet;
var rulesetId = (node.pseudoSignature || '') + '|' + node.selector.selectors.first().id;
var rulesetMap;
var shorts;
if (!stylesheetMap.hasOwnProperty(stylesheet.id)) {
rulesetMap = {
lastShortSelector: null
};
stylesheetMap[stylesheet.id] = rulesetMap;
} else {
rulesetMap = stylesheetMap[stylesheet.id];
}
if (rulesetMap.hasOwnProperty(rulesetId)) {
shorts = rulesetMap[rulesetId];
} else {
shorts = {};
rulesetMap[rulesetId] = shorts;
}
rulesetMap.lastShortSelector = processRuleset.call(this, node, shorts, shortDeclarations, rulesetMap.lastShortSelector);
});
processShorthands(shortDeclarations, indexer.declaration);
};

261
node_modules/csso/lib/compressor/restructure/6-restructBlock.js generated vendored
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@@ -1,261 +0,0 @@
var resolveProperty = require('../../utils/names.js').property;
var resolveKeyword = require('../../utils/names.js').keyword;
var walkRulesRight = require('../../utils/walk.js').rulesRight;
var translate = require('../../utils/translate.js');
var dontRestructure = {
'src': 1 // https://github.com/afelix/csso/issues/50
};
var DONT_MIX_VALUE = {
// https://developer.mozilla.org/en-US/docs/Web/CSS/display#Browser_compatibility
'display': /table|ruby|flex|-(flex)?box$|grid|contents|run-in/i,
// https://developer.mozilla.org/en/docs/Web/CSS/text-align
'text-align': /^(start|end|match-parent|justify-all)$/i
};
var CURSOR_SAFE_VALUE = [
'auto', 'crosshair', 'default', 'move', 'text', 'wait', 'help',
'n-resize', 'e-resize', 's-resize', 'w-resize',
'ne-resize', 'nw-resize', 'se-resize', 'sw-resize',
'pointer', 'progress', 'not-allowed', 'no-drop', 'vertical-text', 'all-scroll',
'col-resize', 'row-resize'
];
var NEEDLESS_TABLE = {
'border-width': ['border'],
'border-style': ['border'],
'border-color': ['border'],
'border-top': ['border'],
'border-right': ['border'],
'border-bottom': ['border'],
'border-left': ['border'],
'border-top-width': ['border-top', 'border-width', 'border'],
'border-right-width': ['border-right', 'border-width', 'border'],
'border-bottom-width': ['border-bottom', 'border-width', 'border'],
'border-left-width': ['border-left', 'border-width', 'border'],
'border-top-style': ['border-top', 'border-style', 'border'],
'border-right-style': ['border-right', 'border-style', 'border'],
'border-bottom-style': ['border-bottom', 'border-style', 'border'],
'border-left-style': ['border-left', 'border-style', 'border'],
'border-top-color': ['border-top', 'border-color', 'border'],
'border-right-color': ['border-right', 'border-color', 'border'],
'border-bottom-color': ['border-bottom', 'border-color', 'border'],
'border-left-color': ['border-left', 'border-color', 'border'],
'margin-top': ['margin'],
'margin-right': ['margin'],
'margin-bottom': ['margin'],
'margin-left': ['margin'],
'padding-top': ['padding'],
'padding-right': ['padding'],
'padding-bottom': ['padding'],
'padding-left': ['padding'],
'font-style': ['font'],
'font-variant': ['font'],
'font-weight': ['font'],
'font-size': ['font'],
'font-family': ['font'],
'list-style-type': ['list-style'],
'list-style-position': ['list-style'],
'list-style-image': ['list-style']
};
function getPropertyFingerprint(propertyName, declaration, fingerprints) {
var realName = resolveProperty(propertyName).name;
if (realName === 'background' ||
(realName === 'filter' && declaration.value.sequence.first().type === 'Progid')) {
return propertyName + ':' + translate(declaration.value);
}
var declarationId = declaration.id;
var fingerprint = fingerprints[declarationId];
if (!fingerprint) {
var vendorId = '';
var iehack = '';
var special = {};
declaration.value.sequence.each(function walk(node) {
switch (node.type) {
case 'Argument':
case 'Value':
case 'Braces':
node.sequence.each(walk);
break;
case 'Identifier':
var name = node.name;
if (!vendorId) {
vendorId = resolveKeyword(name).vendor;
}
if (/\\[09]/.test(name)) {
iehack = RegExp.lastMatch;
}
if (realName === 'cursor') {
if (CURSOR_SAFE_VALUE.indexOf(name) === -1) {
special[name] = true;
}
} else if (DONT_MIX_VALUE.hasOwnProperty(realName)) {
if (DONT_MIX_VALUE[realName].test(name)) {
special[name] = true;
}
}
break;
case 'Function':
var name = node.name;
if (!vendorId) {
vendorId = resolveKeyword(name).vendor;
}
if (name === 'rect') {
// there are 2 forms of rect:
// rect(<top>, <right>, <bottom>, <left>) - standart
// rect(<top> <right> <bottom> <left>) – backwards compatible syntax
// only the same form values can be merged
if (node.arguments.size < 4) {
name = 'rect-backward';
}
}
special[name + '()'] = true;
// check nested tokens too
node.arguments.each(walk);
break;
case 'Dimension':
var unit = node.unit;
switch (unit) {
// is not supported until IE11
case 'rem':
// v* units is too buggy across browsers and better
// don't merge values with those units
case 'vw':
case 'vh':
case 'vmin':
case 'vmax':
case 'vm': // IE9 supporting "vm" instead of "vmin".
special[unit] = true;
break;
}
break;
}
});
fingerprint = '|' + Object.keys(special).sort() + '|' + iehack + vendorId;
fingerprints[declarationId] = fingerprint;
}
return propertyName + fingerprint;
}
function needless(props, declaration, fingerprints) {
var property = resolveProperty(declaration.property.name);
if (NEEDLESS_TABLE.hasOwnProperty(property.name)) {
var table = NEEDLESS_TABLE[property.name];
for (var i = 0; i < table.length; i++) {
var ppre = getPropertyFingerprint(property.prefix + table[i], declaration, fingerprints);
var prev = props[ppre];
if (prev && (!declaration.value.important || prev.item.data.value.important)) {
return prev;
}
}
}
}
function processRuleset(ruleset, item, list, props, fingerprints) {
var declarations = ruleset.block.declarations;
declarations.eachRight(function(declaration, declarationItem) {
var property = declaration.property.name;
var fingerprint = getPropertyFingerprint(property, declaration, fingerprints);
var prev = props[fingerprint];
if (prev && !dontRestructure.hasOwnProperty(property)) {
if (declaration.value.important && !prev.item.data.value.important) {
props[fingerprint] = {
block: declarations,
item: declarationItem
};
prev.block.remove(prev.item);
declaration.info = {
primary: declaration.info,
merged: prev.item.data.info
};
} else {
declarations.remove(declarationItem);
prev.item.data.info = {
primary: prev.item.data.info,
merged: declaration.info
};
}
} else {
var prev = needless(props, declaration, fingerprints);
if (prev) {
declarations.remove(declarationItem);
prev.item.data.info = {
primary: prev.item.data.info,
merged: declaration.info
};
} else {
declaration.fingerprint = fingerprint;
props[fingerprint] = {
block: declarations,
item: declarationItem
};
}
}
});
if (declarations.isEmpty()) {
list.remove(item);
}
};
module.exports = function restructBlock(ast) {
var stylesheetMap = {};
var fingerprints = Object.create(null);
walkRulesRight(ast, function(node, item, list) {
if (node.type !== 'Ruleset') {
return;
}
var stylesheet = this.stylesheet;
var rulesetId = (node.pseudoSignature || '') + '|' + node.selector.selectors.first().id;
var rulesetMap;
var props;
if (!stylesheetMap.hasOwnProperty(stylesheet.id)) {
rulesetMap = {};
stylesheetMap[stylesheet.id] = rulesetMap;
} else {
rulesetMap = stylesheetMap[stylesheet.id];
}
if (rulesetMap.hasOwnProperty(rulesetId)) {
props = rulesetMap[rulesetId];
} else {
props = {};
rulesetMap[rulesetId] = props;
}
processRuleset.call(this, node, item, list, props, fingerprints);
});
};

87
node_modules/csso/lib/compressor/restructure/7-mergeRuleset.js generated vendored
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@@ -1,87 +0,0 @@
var utils = require('./utils.js');
var walkRules = require('../../utils/walk.js').rules;
/*
At this step all rules has single simple selector. We try to join by equal
declaration blocks to first rule, e.g.
.a { color: red }
b { ... }
.b { color: red }
->
.a, .b { color: red }
b { ... }
*/
function processRuleset(node, item, list) {
var selectors = node.selector.selectors;
var declarations = node.block.declarations;
var nodeCompareMarker = selectors.first().compareMarker;
var skippedCompareMarkers = {};
list.nextUntil(item.next, function(next, nextItem) {
// skip non-ruleset node if safe
if (next.type !== 'Ruleset') {
return utils.unsafeToSkipNode.call(selectors, next);
}
if (node.pseudoSignature !== next.pseudoSignature) {
return true;
}
var nextFirstSelector = next.selector.selectors.head;
var nextDeclarations = next.block.declarations;
var nextCompareMarker = nextFirstSelector.data.compareMarker;
// if next ruleset has same marked as one of skipped then stop joining
if (nextCompareMarker in skippedCompareMarkers) {
return true;
}
// try to join by selectors
if (selectors.head === selectors.tail) {
if (selectors.first().id === nextFirstSelector.data.id) {
declarations.appendList(nextDeclarations);
list.remove(nextItem);
return;
}
}
// try to join by properties
if (utils.isEqualDeclarations(declarations, nextDeclarations)) {
var nextStr = nextFirstSelector.data.id;
selectors.some(function(data, item) {
var curStr = data.id;
if (nextStr < curStr) {
selectors.insert(nextFirstSelector, item);
return true;
}
if (!item.next) {
selectors.insert(nextFirstSelector);
return true;
}
});
list.remove(nextItem);
return;
}
// go to next ruleset if current one can be skipped (has no equal specificity nor element selector)
if (nextCompareMarker === nodeCompareMarker) {
return true;
}
skippedCompareMarkers[nextCompareMarker] = true;
});
};
module.exports = function mergeRuleset(ast) {
walkRules(ast, function(node, item, list) {
if (node.type === 'Ruleset') {
processRuleset(node, item, list);
}
});
};

157
node_modules/csso/lib/compressor/restructure/8-restructRuleset.js generated vendored
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@@ -1,157 +0,0 @@
var List = require('../../utils/list.js');
var utils = require('./utils.js');
var walkRulesRight = require('../../utils/walk.js').rulesRight;
function calcSelectorLength(list) {
var length = 0;
list.each(function(data) {
length += data.id.length + 1;
});
return length - 1;
}
function calcDeclarationsLength(tokens) {
var length = 0;
for (var i = 0; i < tokens.length; i++) {
length += tokens[i].length;
}
return (
length + // declarations
tokens.length - 1 // delimeters
);
}
function processRuleset(node, item, list) {
var avoidRulesMerge = this.stylesheet.avoidRulesMerge;
var selectors = node.selector.selectors;
var block = node.block;
var disallowDownMarkers = Object.create(null);
var allowMergeUp = true;
var allowMergeDown = true;
list.prevUntil(item.prev, function(prev, prevItem) {
// skip non-ruleset node if safe
if (prev.type !== 'Ruleset') {
return utils.unsafeToSkipNode.call(selectors, prev);
}
var prevSelectors = prev.selector.selectors;
var prevBlock = prev.block;
if (node.pseudoSignature !== prev.pseudoSignature) {
return true;
}
allowMergeDown = !prevSelectors.some(function(selector) {
return selector.compareMarker in disallowDownMarkers;
});
// try prev ruleset if simpleselectors has no equal specifity and element selector
if (!allowMergeDown && !allowMergeUp) {
return true;
}
// try to join by selectors
if (allowMergeUp && utils.isEqualLists(prevSelectors, selectors)) {
prevBlock.declarations.appendList(block.declarations);
list.remove(item);
return true;
}
// try to join by properties
var diff = utils.compareDeclarations(block.declarations, prevBlock.declarations);
// console.log(diff.eq, diff.ne1, diff.ne2);
if (diff.eq.length) {
if (!diff.ne1.length && !diff.ne2.length) {
// equal blocks
if (allowMergeDown) {
utils.addSelectors(selectors, prevSelectors);
list.remove(prevItem);
}
return true;
} else if (!avoidRulesMerge) { /* probably we don't need to prevent those merges for @keyframes
TODO: need to be checked */
if (diff.ne1.length && !diff.ne2.length) {
// prevBlock is subset block
var selectorLength = calcSelectorLength(selectors);
var blockLength = calcDeclarationsLength(diff.eq); // declarations length
if (allowMergeUp && selectorLength < blockLength) {
utils.addSelectors(prevSelectors, selectors);
block.declarations = new List(diff.ne1);
}
} else if (!diff.ne1.length && diff.ne2.length) {
// node is subset of prevBlock
var selectorLength = calcSelectorLength(prevSelectors);
var blockLength = calcDeclarationsLength(diff.eq); // declarations length
if (allowMergeDown && selectorLength < blockLength) {
utils.addSelectors(selectors, prevSelectors);
prevBlock.declarations = new List(diff.ne2);
}
} else {
// diff.ne1.length && diff.ne2.length
// extract equal block
var newSelector = {
type: 'Selector',
info: {},
selectors: utils.addSelectors(prevSelectors.copy(), selectors)
};
var newBlockLength = calcSelectorLength(newSelector.selectors) + 2; // selectors length + curly braces length
var blockLength = calcDeclarationsLength(diff.eq); // declarations length
// create new ruleset if declarations length greater than
// ruleset description overhead
if (allowMergeDown && blockLength >= newBlockLength) {
var newRuleset = {
type: 'Ruleset',
info: {},
pseudoSignature: node.pseudoSignature,
selector: newSelector,
block: {
type: 'Block',
info: {},
declarations: new List(diff.eq)
}
};
block.declarations = new List(diff.ne1);
prevBlock.declarations = new List(diff.ne2.concat(diff.ne2overrided));
list.insert(list.createItem(newRuleset), prevItem);
return true;
}
}
}
}
if (allowMergeUp) {
// TODO: disallow up merge only if any property interception only (i.e. diff.ne2overrided.length > 0);
// await property families to find property interception correctly
allowMergeUp = !prevSelectors.some(function(prevSelector) {
return selectors.some(function(selector) {
return selector.compareMarker === prevSelector.compareMarker;
});
});
}
prevSelectors.each(function(data) {
disallowDownMarkers[data.compareMarker] = true;
});
});
};
module.exports = function restructRuleset(ast) {
walkRulesRight(ast, function(node, item, list) {
if (node.type === 'Ruleset') {
processRuleset.call(this, node, item, list);
}
});
};

35
node_modules/csso/lib/compressor/restructure/index.js generated vendored
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@@ -1,35 +0,0 @@
var prepare = require('./prepare/index.js');
var initialMergeRuleset = require('./1-initialMergeRuleset.js');
var mergeAtrule = require('./2-mergeAtrule.js');
var disjoinRuleset = require('./3-disjoinRuleset.js');
var restructShorthand = require('./4-restructShorthand.js');
var restructBlock = require('./6-restructBlock.js');
var mergeRuleset = require('./7-mergeRuleset.js');
var restructRuleset = require('./8-restructRuleset.js');
module.exports = function(ast, usageData, debug) {
// prepare ast for restructing
var indexer = prepare(ast, usageData);
debug('prepare', ast);
initialMergeRuleset(ast);
debug('initialMergeRuleset', ast);
mergeAtrule(ast);
debug('mergeAtrule', ast);
disjoinRuleset(ast);
debug('disjoinRuleset', ast);
restructShorthand(ast, indexer);
debug('restructShorthand', ast);
restructBlock(ast);
debug('restructBlock', ast);
mergeRuleset(ast);
debug('mergeRuleset', ast);
restructRuleset(ast);
debug('restructRuleset', ast);
};

32
node_modules/csso/lib/compressor/restructure/prepare/createDeclarationIndexer.js generated vendored
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@@ -1,32 +0,0 @@
var translate = require('../../../utils/translate.js');
function Index() {
this.seed = 0;
this.map = Object.create(null);
}
Index.prototype.resolve = function(str) {
var index = this.map[str];
if (!index) {
index = ++this.seed;
this.map[str] = index;
}
return index;
};
module.exports = function createDeclarationIndexer() {
var names = new Index();
var values = new Index();
return function markDeclaration(node) {
var property = node.property.name;
var value = translate(node.value);
node.id = names.resolve(property) + (values.resolve(value) << 12);
node.length = property.length + 1 + value.length;
return node;
};
};

44
node_modules/csso/lib/compressor/restructure/prepare/index.js generated vendored
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@@ -1,44 +0,0 @@
var resolveKeyword = require('../../../utils/names.js').keyword;
var walkRules = require('../../../utils/walk.js').rules;
var translate = require('../../../utils/translate.js');
var createDeclarationIndexer = require('./createDeclarationIndexer.js');
var processSelector = require('./processSelector.js');
function walk(node, markDeclaration, usageData) {
switch (node.type) {
case 'Ruleset':
node.block.declarations.each(markDeclaration);
processSelector(node, usageData);
break;
case 'Atrule':
if (node.expression) {
node.expression.id = translate(node.expression);
}
// compare keyframe selectors by its values
// NOTE: still no clarification about problems with keyframes selector grouping (issue #197)
if (resolveKeyword(node.name).name === 'keyframes') {
node.block.avoidRulesMerge = true; /* probably we don't need to prevent those merges for @keyframes
TODO: need to be checked */
node.block.rules.each(function(ruleset) {
ruleset.selector.selectors.each(function(simpleselector) {
simpleselector.compareMarker = simpleselector.id;
});
});
}
break;
}
};
module.exports = function prepare(ast, usageData) {
var markDeclaration = createDeclarationIndexer();
walkRules(ast, function(node) {
walk(node, markDeclaration, usageData);
});
return {
declaration: markDeclaration
};
};

99
node_modules/csso/lib/compressor/restructure/prepare/processSelector.js generated vendored
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@@ -1,99 +0,0 @@
var translate = require('../../../utils/translate.js');
var specificity = require('./specificity.js');
var nonFreezePseudoElements = {
'first-letter': true,
'first-line': true,
'after': true,
'before': true
};
var nonFreezePseudoClasses = {
'link': true,
'visited': true,
'hover': true,
'active': true,
'first-letter': true,
'first-line': true,
'after': true,
'before': true
};
module.exports = function freeze(node, usageData) {
var pseudos = Object.create(null);
var hasPseudo = false;
node.selector.selectors.each(function(simpleSelector) {
var tagName = '*';
var scope = 0;
simpleSelector.sequence.some(function(node) {
switch (node.type) {
case 'Class':
if (usageData && usageData.scopes) {
var classScope = usageData.scopes[node.name] || 0;
if (scope !== 0 && classScope !== scope) {
throw new Error('Selector can\'t has classes from different scopes: ' + translate(simpleSelector));
}
scope = classScope;
}
break;
case 'PseudoClass':
if (!nonFreezePseudoClasses.hasOwnProperty(node.name)) {
pseudos[node.name] = true;
hasPseudo = true;
}
break;
case 'PseudoElement':
if (!nonFreezePseudoElements.hasOwnProperty(node.name)) {
pseudos[node.name] = true;
hasPseudo = true;
}
break;
case 'FunctionalPseudo':
pseudos[node.name] = true;
hasPseudo = true;
break;
case 'Negation':
pseudos.not = true;
hasPseudo = true;
break;
case 'Identifier':
tagName = node.name;
break;
case 'Attribute':
if (node.flags) {
pseudos['[' + node.flags + ']'] = true;
hasPseudo = true;
}
break;
case 'Combinator':
tagName = '*';
break;
}
});
simpleSelector.id = translate(simpleSelector);
simpleSelector.compareMarker = specificity(simpleSelector).toString();
if (scope) {
simpleSelector.compareMarker += ':' + scope;
}
if (tagName !== '*') {
simpleSelector.compareMarker += ',' + tagName;
}
});
if (hasPseudo) {
node.pseudoSignature = Object.keys(pseudos).sort().join(',');
}
};

48
node_modules/csso/lib/compressor/restructure/prepare/specificity.js generated vendored
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@@ -1,48 +0,0 @@
module.exports = function specificity(simpleSelector) {
var A = 0;
var B = 0;
var C = 0;
simpleSelector.sequence.each(function walk(data) {
switch (data.type) {
case 'SimpleSelector':
case 'Negation':
data.sequence.each(walk);
break;
case 'Id':
A++;
break;
case 'Class':
case 'Attribute':
case 'FunctionalPseudo':
B++;
break;
case 'Identifier':
if (data.name !== '*') {
C++;
}
break;
case 'PseudoElement':
C++;
break;
case 'PseudoClass':
var name = data.name.toLowerCase();
if (name === 'before' ||
name === 'after' ||
name === 'first-line' ||
name === 'first-letter') {
C++;
} else {
B++;
}
break;
}
});
return [A, B, C];
};

141
node_modules/csso/lib/compressor/restructure/utils.js generated vendored
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@@ -1,141 +0,0 @@
var hasOwnProperty = Object.prototype.hasOwnProperty;
function isEqualLists(a, b) {
var cursor1 = a.head;
var cursor2 = b.head;
while (cursor1 !== null && cursor2 !== null && cursor1.data.id === cursor2.data.id) {
cursor1 = cursor1.next;
cursor2 = cursor2.next;
}
return cursor1 === null && cursor2 === null;
}
function isEqualDeclarations(a, b) {
var cursor1 = a.head;
var cursor2 = b.head;
while (cursor1 !== null && cursor2 !== null && cursor1.data.id === cursor2.data.id) {
cursor1 = cursor1.next;
cursor2 = cursor2.next;
}
return cursor1 === null && cursor2 === null;
}
function compareDeclarations(declarations1, declarations2) {
var result = {
eq: [],
ne1: [],
ne2: [],
ne2overrided: []
};
var fingerprints = Object.create(null);
var declarations2hash = Object.create(null);
for (var cursor = declarations2.head; cursor; cursor = cursor.next) {
declarations2hash[cursor.data.id] = true;
}
for (var cursor = declarations1.head; cursor; cursor = cursor.next) {
var data = cursor.data;
if (data.fingerprint) {
fingerprints[data.fingerprint] = data.value.important;
}
if (declarations2hash[data.id]) {
declarations2hash[data.id] = false;
result.eq.push(data);
} else {
result.ne1.push(data);
}
}
for (var cursor = declarations2.head; cursor; cursor = cursor.next) {
var data = cursor.data;
if (declarations2hash[data.id]) {
// if declarations1 has overriding declaration, this is not a difference
// but take in account !important - prev should be equal or greater than follow
if (hasOwnProperty.call(fingerprints, data.fingerprint) &&
Number(fingerprints[data.fingerprint]) >= Number(data.value.important)) {
result.ne2overrided.push(data);
} else {
result.ne2.push(data);
}
}
}
return result;
}
function addSelectors(dest, source) {
source.each(function(sourceData) {
var newStr = sourceData.id;
var cursor = dest.head;
while (cursor) {
var nextStr = cursor.data.id;
if (nextStr === newStr) {
return;
}
if (nextStr > newStr) {
break;
}
cursor = cursor.next;
}
dest.insert(dest.createItem(sourceData), cursor);
});
return dest;
}
// check if simpleselectors has no equal specificity and element selector
function hasSimilarSelectors(selectors1, selectors2) {
return selectors1.some(function(a) {
return selectors2.some(function(b) {
return a.compareMarker === b.compareMarker;
});
});
}
// test node can't to be skipped
function unsafeToSkipNode(node) {
switch (node.type) {
case 'Ruleset':
// unsafe skip ruleset with selector similarities
return hasSimilarSelectors(node.selector.selectors, this);
case 'Atrule':
// can skip at-rules with blocks
if (node.block) {
// non-stylesheet blocks are safe to skip since have no selectors
if (node.block.type !== 'StyleSheet') {
return false;
}
// unsafe skip at-rule if block contains something unsafe to skip
return node.block.rules.some(unsafeToSkipNode, this);
}
break;
}
// unsafe by default
return true;
}
module.exports = {
isEqualLists: isEqualLists,
isEqualDeclarations: isEqualDeclarations,
compareDeclarations: compareDeclarations,
addSelectors: addSelectors,
hasSimilarSelectors: hasSimilarSelectors,
unsafeToSkipNode: unsafeToSkipNode
};