diff options
Diffstat (limited to 'node_modules/csso/cjs/restructure/prepare')
4 files changed, 0 insertions, 313 deletions
diff --git a/node_modules/csso/cjs/restructure/prepare/createDeclarationIndexer.cjs b/node_modules/csso/cjs/restructure/prepare/createDeclarationIndexer.cjs deleted file mode 100644 index 94489728..00000000 --- a/node_modules/csso/cjs/restructure/prepare/createDeclarationIndexer.cjs +++ /dev/null @@ -1,34 +0,0 @@ -'use strict'; - -const cssTree = require('css-tree'); - -class Index { - constructor() { - this.map = new Map(); - } - resolve(str) { - let index = this.map.get(str); - - if (index === undefined) { - index = this.map.size + 1; - this.map.set(str, index); - } - - return index; - } -} -function createDeclarationIndexer() { - const ids = new Index(); - - return function markDeclaration(node) { - const id = cssTree.generate(node); - - node.id = ids.resolve(id); - node.length = id.length; - node.fingerprint = null; - - return node; - }; -} - -module.exports = createDeclarationIndexer; diff --git a/node_modules/csso/cjs/restructure/prepare/index.cjs b/node_modules/csso/cjs/restructure/prepare/index.cjs deleted file mode 100644 index 42b49127..00000000 --- a/node_modules/csso/cjs/restructure/prepare/index.cjs +++ /dev/null @@ -1,45 +0,0 @@ -'use strict'; - -const cssTree = require('css-tree'); -const createDeclarationIndexer = require('./createDeclarationIndexer.cjs'); -const processSelector = require('./processSelector.cjs'); - -function prepare(ast, options) { - const markDeclaration = createDeclarationIndexer(); - - cssTree.walk(ast, { - visit: 'Rule', - enter(node) { - node.block.children.forEach(markDeclaration); - processSelector(node, options.usage); - } - }); - - cssTree.walk(ast, { - visit: 'Atrule', - enter(node) { - if (node.prelude) { - node.prelude.id = null; // pre-init property to avoid multiple hidden class for generate - node.prelude.id = cssTree.generate(node.prelude); - } - - // compare keyframe selectors by its values - // NOTE: still no clarification about problems with keyframes selector grouping (issue #197) - if (cssTree.keyword(node.name).basename === 'keyframes') { - node.block.avoidRulesMerge = true; /* probably we don't need to prevent those merges for @keyframes - TODO: need to be checked */ - node.block.children.forEach(function(rule) { - rule.prelude.children.forEach(function(simpleselector) { - simpleselector.compareMarker = simpleselector.id; - }); - }); - } - } - }); - - return { - declaration: markDeclaration - }; -} - -module.exports = prepare; diff --git a/node_modules/csso/cjs/restructure/prepare/processSelector.cjs b/node_modules/csso/cjs/restructure/prepare/processSelector.cjs deleted file mode 100644 index 5c9e1d21..00000000 --- a/node_modules/csso/cjs/restructure/prepare/processSelector.cjs +++ /dev/null @@ -1,101 +0,0 @@ -'use strict'; - -const cssTree = require('css-tree'); -const specificity = require('./specificity.cjs'); - -const nonFreezePseudoElements = new Set([ - 'first-letter', - 'first-line', - 'after', - 'before' -]); -const nonFreezePseudoClasses = new Set([ - 'link', - 'visited', - 'hover', - 'active', - 'first-letter', - 'first-line', - 'after', - 'before' -]); - -function processSelector(node, usageData) { - const pseudos = new Set(); - - node.prelude.children.forEach(function(simpleSelector) { - let tagName = '*'; - let scope = 0; - - simpleSelector.children.forEach(function(node) { - switch (node.type) { - case 'ClassSelector': - if (usageData && usageData.scopes) { - const classScope = usageData.scopes[node.name] || 0; - - if (scope !== 0 && classScope !== scope) { - throw new Error('Selector can\'t has classes from different scopes: ' + cssTree.generate(simpleSelector)); - } - - scope = classScope; - } - - break; - - case 'PseudoClassSelector': { - const name = node.name.toLowerCase(); - - if (!nonFreezePseudoClasses.has(name)) { - pseudos.add(`:${name}`); - } - - break; - } - - case 'PseudoElementSelector': { - const name = node.name.toLowerCase(); - - if (!nonFreezePseudoElements.has(name)) { - pseudos.add(`::${name}`); - } - - break; - } - - case 'TypeSelector': - tagName = node.name.toLowerCase(); - break; - - case 'AttributeSelector': - if (node.flags) { - pseudos.add(`[${node.flags.toLowerCase()}]`); - } - - break; - - case 'Combinator': - tagName = '*'; - break; - } - }); - - simpleSelector.compareMarker = specificity(simpleSelector).toString(); - simpleSelector.id = null; // pre-init property to avoid multiple hidden class - simpleSelector.id = cssTree.generate(simpleSelector); - - if (scope) { - simpleSelector.compareMarker += ':' + scope; - } - - if (tagName !== '*') { - simpleSelector.compareMarker += ',' + tagName; - } - }); - - // add property to all rule nodes to avoid multiple hidden class - node.pseudoSignature = pseudos.size > 0 - ? [...pseudos].sort().join(',') - : false; -} - -module.exports = processSelector; diff --git a/node_modules/csso/cjs/restructure/prepare/specificity.cjs b/node_modules/csso/cjs/restructure/prepare/specificity.cjs deleted file mode 100644 index b62c3291..00000000 --- a/node_modules/csso/cjs/restructure/prepare/specificity.cjs +++ /dev/null @@ -1,133 +0,0 @@ -'use strict'; - -const cssTree = require('css-tree'); - -function ensureSelectorList(node) { - if (node.type === 'Raw') { - return cssTree.parse(node.value, { context: 'selectorList' }); - } - - return node; -} - -function maxSpecificity(a, b) { - for (let i = 0; i < 3; i++) { - if (a[i] !== b[i]) { - return a[i] > b[i] ? a : b; - } - } - - return a; -} - -function maxSelectorListSpecificity(selectorList) { - return ensureSelectorList(selectorList).children.reduce( - (result, node) => maxSpecificity(specificity(node), result), - [0, 0, 0] - ); -} - -// §16. Calculating a selector’s specificity -// https://www.w3.org/TR/selectors-4/#specificity-rules -function specificity(simpleSelector) { - let A = 0; - let B = 0; - let C = 0; - - // A selector’s specificity is calculated for a given element as follows: - simpleSelector.children.forEach((node) => { - switch (node.type) { - // count the number of ID selectors in the selector (= A) - case 'IdSelector': - A++; - break; - - // count the number of class selectors, attributes selectors, ... - case 'ClassSelector': - case 'AttributeSelector': - B++; - break; - - // ... and pseudo-classes in the selector (= B) - case 'PseudoClassSelector': - switch (node.name.toLowerCase()) { - // The specificity of an :is(), :not(), or :has() pseudo-class is replaced - // by the specificity of the most specific complex selector in its selector list argument. - case 'not': - case 'has': - case 'is': - // :matches() is used before it was renamed to :is() - // https://github.com/w3c/csswg-drafts/issues/3258 - case 'matches': - // Older browsers support :is() functionality as prefixed pseudo-class :any() - // https://developer.mozilla.org/en-US/docs/Web/CSS/:is - case '-webkit-any': - case '-moz-any': { - const [a, b, c] = maxSelectorListSpecificity(node.children.first); - - A += a; - B += b; - C += c; - - break; - } - - // Analogously, the specificity of an :nth-child() or :nth-last-child() selector - // is the specificity of the pseudo class itself (counting as one pseudo-class selector) - // plus the specificity of the most specific complex selector in its selector list argument (if any). - case 'nth-child': - case 'nth-last-child': { - const arg = node.children.first; - - if (arg.type === 'Nth' && arg.selector) { - const [a, b, c] = maxSelectorListSpecificity(arg.selector); - - A += a; - B += b + 1; - C += c; - } else { - B++; - } - - break; - } - - // The specificity of a :where() pseudo-class is replaced by zero. - case 'where': - break; - - // The four Level 2 pseudo-elements (::before, ::after, ::first-line, and ::first-letter) may, - // for legacy reasons, be represented using the <pseudo-class-selector> grammar, - // with only a single ":" character at their start. - // https://www.w3.org/TR/selectors-4/#single-colon-pseudos - case 'before': - case 'after': - case 'first-line': - case 'first-letter': - C++; - break; - - default: - B++; - } - break; - - // count the number of type selectors ... - case 'TypeSelector': - // ignore the universal selector - if (!node.name.endsWith('*')) { - C++; - } - break; - - // ... and pseudo-elements in the selector (= C) - case 'PseudoElementSelector': - C++; - break; - } - }); - - return [A, B, C]; -} - -module.exports = specificity; |