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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
commite06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch)
tree55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/postcss-modules-local-by-default/index.js
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+var postcss = require('postcss');
+var Tokenizer = require('css-selector-tokenizer');
+
+function normalizeNodeArray(nodes) {
+ var array = [];
+ nodes.forEach(function(x) {
+ if(Array.isArray(x)) {
+ normalizeNodeArray(x).forEach(function(item) {
+ array.push(item);
+ });
+ } else if(x) {
+ array.push(x);
+ }
+ });
+ if(array.length > 0 && array[array.length - 1].type === 'spacing') {
+ array.pop();
+ }
+ return array;
+}
+
+function localizeNode(node, context) {
+ if(context.ignoreNextSpacing && node.type !== 'spacing') {
+ throw new Error('Missing whitespace after :' + context.ignoreNextSpacing);
+ }
+ if(context.enforceNoSpacing && node.type === 'spacing') {
+ throw new Error('Missing whitespace before :' + context.enforceNoSpacing);
+ }
+
+ var newNodes;
+ switch(node.type) {
+ case 'selectors':
+ var resultingGlobal;
+ context.hasPureGlobals = false;
+ newNodes = node.nodes.map(function(n) {
+ var nContext = {
+ global: context.global,
+ lastWasSpacing: true,
+ hasLocals: false,
+ explicit: false
+ };
+ n = localizeNode(n, nContext);
+ if(typeof resultingGlobal === 'undefined') {
+ resultingGlobal = nContext.global;
+ } else if(resultingGlobal !== nContext.global) {
+ throw new Error('Inconsistent rule global/local result in rule "' +
+ Tokenizer.stringify(node) + '" (multiple selectors must result in the same mode for the rule)');
+ }
+ if(!nContext.hasLocals) {
+ context.hasPureGlobals = true;
+ }
+ return n;
+ });
+ context.global = resultingGlobal;
+ node = Object.create(node);
+ node.nodes = normalizeNodeArray(newNodes);
+ break;
+
+ case 'selector':
+ newNodes = node.nodes.map(function(n) {
+ return localizeNode(n, context);
+ });
+ node = Object.create(node);
+ node.nodes = normalizeNodeArray(newNodes);
+ break;
+
+ case 'spacing':
+ if(context.ignoreNextSpacing) {
+ context.ignoreNextSpacing = false;
+ context.lastWasSpacing = false;
+ context.enforceNoSpacing = false;
+ return null;
+ }
+ context.lastWasSpacing = true;
+ return node;
+
+ case 'pseudo-class':
+ if(node.name === 'local' || node.name === 'global') {
+ if(context.inside) {
+ throw new Error('A :' + node.name + ' is not allowed inside of a :' + context.inside + '(...)');
+ }
+ context.ignoreNextSpacing = context.lastWasSpacing ? node.name : false;
+ context.enforceNoSpacing = context.lastWasSpacing ? false : node.name;
+ context.global = (node.name === 'global');
+ context.explicit = true;
+ return null;
+ }
+ break;
+
+ case 'nested-pseudo-class':
+ var subContext;
+ if(node.name === 'local' || node.name === 'global') {
+ if(context.inside) {
+ throw new Error('A :' + node.name + '(...) is not allowed inside of a :' + context.inside + '(...)');
+ }
+ subContext = {
+ global: (node.name === 'global'),
+ inside: node.name,
+ hasLocals: false,
+ explicit: true
+ };
+ node = node.nodes.map(function(n) {
+ return localizeNode(n, subContext);
+ });
+ // don't leak spacing
+ node[0].before = undefined;
+ node[node.length - 1].after = undefined;
+ } else {
+ subContext = {
+ global: context.global,
+ inside: context.inside,
+ lastWasSpacing: true,
+ hasLocals: false,
+ explicit: context.explicit
+ };
+ newNodes = node.nodes.map(function(n) {
+ return localizeNode(n, subContext);
+ });
+ node = Object.create(node);
+ node.nodes = normalizeNodeArray(newNodes);
+ }
+ if(subContext.hasLocals) {
+ context.hasLocals = true;
+ }
+ break;
+
+ case 'id':
+ case 'class':
+ if(!context.global) {
+ node = {
+ type: 'nested-pseudo-class',
+ name: 'local',
+ nodes: [node]
+ };
+ context.hasLocals = true;
+ }
+ break;
+ }
+
+ // reset context
+ context.lastWasSpacing = false;
+ context.ignoreNextSpacing = false;
+ context.enforceNoSpacing = false;
+ return node;
+}
+
+function localizeDeclNode(node, context) {
+ var newNode;
+ switch(node.type) {
+ case 'item':
+ if(context.localizeNextItem) {
+ newNode = Object.create(node);
+ newNode.name = ':local(' + newNode.name + ')';
+ context.localizeNextItem = false;
+ return newNode;
+ }
+ break;
+
+ case 'nested-item':
+ var newNodes = node.nodes.map(function(n) {
+ return localizeDeclValue(n, context);
+ });
+ node = Object.create(node);
+ node.nodes = newNodes;
+ break;
+
+ case 'url':
+ if(context.options && context.options.rewriteUrl) {
+ newNode = Object.create(node);
+ newNode.url = context.options.rewriteUrl(context.global, node.url);
+ return newNode;
+ }
+ break;
+ }
+ return node;
+}
+
+function localizeDeclValue(valueNode, context) {
+ var newValueNode = Object.create(valueNode);
+ newValueNode.nodes = valueNode.nodes.map(function(node) {
+ return localizeDeclNode(node, context);
+ });
+ return newValueNode;
+}
+
+function localizeAnimationShorthandDeclValueNodes(nodes, context) {
+ var validIdent = validIdent = /^-?[_a-z][_a-z0-9-]*$/i;
+
+ /*
+ The spec defines some keywords that you can use to describe properties such as the timing
+ function. These are still valid animation names, so as long as there is a property that accepts
+ a keyword, it is given priority. Only when all the properties that can take a keyword are
+ exhausted can the animation name be set to the keyword. I.e.
+
+ animation: infinite infinite;
+
+ The animation will repeat an infinite number of times from the first argument, and will have an
+ animation name of infinite from the second.
+ */
+ var animationKeywords = {
+ '$alternate': 1,
+ '$alternate-reverse': 1,
+ '$backwards': 1,
+ '$both': 1,
+ '$ease': 1,
+ '$ease-in': 1,
+ '$ease-in-out': 1,
+ '$ease-out': 1,
+ '$forwards': 1,
+ '$infinite': 1,
+ '$linear': 1,
+ '$none': Infinity, // No matter how many times you write none, it will never be an animation name
+ '$normal': 1,
+ '$paused': 1,
+ '$reverse': 1,
+ '$running': 1,
+ '$step-end': 1,
+ '$step-start': 1,
+ '$initial': Infinity,
+ '$inherit': Infinity,
+ '$unset': Infinity,
+ };
+
+ var didParseAnimationName = false;
+ var parsedAnimationKeywords = {};
+ return nodes.map(function(valueNode) {
+ var value = valueNode.type === 'item'
+ ? valueNode.name.toLowerCase()
+ : null;
+
+ var shouldParseAnimationName = false;
+
+ if (!didParseAnimationName && value && validIdent.test(value)) {
+ if ('$' + value in animationKeywords) {
+ parsedAnimationKeywords['$' + value] = ('$' + value in parsedAnimationKeywords)
+ ? (parsedAnimationKeywords['$' + value] + 1)
+ : 0;
+
+ shouldParseAnimationName = (parsedAnimationKeywords['$' + value] >= animationKeywords['$' + value]);
+ } else {
+ shouldParseAnimationName = true;
+ }
+ }
+
+ var subContext = {
+ options: context.options,
+ global: context.global,
+ localizeNextItem: shouldParseAnimationName && !context.global
+ };
+ return localizeDeclNode(valueNode, subContext);
+ });
+}
+
+function localizeAnimationShorthandDeclValues(valuesNode, decl, context) {
+ var newValuesNode = Object.create(valuesNode);
+ newValuesNode.nodes = valuesNode.nodes.map(function(valueNode, index) {
+ var newValueNode = Object.create(valueNode);
+ newValueNode.nodes = localizeAnimationShorthandDeclValueNodes(valueNode.nodes, context);
+ return newValueNode;
+ });
+ decl.value = Tokenizer.stringifyValues(newValuesNode);
+}
+
+function localizeDeclValues(localize, valuesNode, decl, context) {
+ var newValuesNode = Object.create(valuesNode);
+ newValuesNode.nodes = valuesNode.nodes.map(function(valueNode) {
+ var subContext = {
+ options: context.options,
+ global: context.global,
+ localizeNextItem: localize && !context.global
+ };
+ return localizeDeclValue(valueNode, subContext);
+ });
+ decl.value = Tokenizer.stringifyValues(newValuesNode);
+}
+
+function localizeDecl(decl, context) {
+ var valuesNode = Tokenizer.parseValues(decl.value);
+
+ var isAnimation = /animation?$/.test(decl.prop);
+ if (isAnimation) return localizeAnimationShorthandDeclValues(valuesNode, decl, context);
+
+ var isAnimationName = /animation(-name)?$/.test(decl.prop);
+ if (isAnimationName) return localizeDeclValues(true, valuesNode, decl, context);
+
+ return localizeDeclValues(false, valuesNode, decl, context);
+}
+
+module.exports = postcss.plugin('postcss-modules-local-by-default', function (options) {
+ if (typeof options !== 'object') {
+ options = {}; // If options is undefined or not an object the plugin fails
+ }
+ if(options && options.mode) {
+ if(options.mode !== 'global' && options.mode !== 'local' && options.mode !== 'pure') {
+ throw new Error('options.mode must be either "global", "local" or "pure" (default "local")');
+ }
+ }
+ var pureMode = options && options.mode === 'pure';
+ var globalMode = options && options.mode === 'global';
+ return function(css) {
+ css.walkAtRules(function(atrule) {
+ if(/keyframes$/.test(atrule.name)) {
+ var globalMatch = /^\s*:global\s*\((.+)\)\s*$/.exec(atrule.params);
+ var localMatch = /^\s*:local\s*\((.+)\)\s*$/.exec(atrule.params);
+ var globalKeyframes = globalMode;
+ if(globalMatch) {
+ if(pureMode) {
+ throw atrule.error('@keyframes :global(...) is not allowed in pure mode');
+ }
+ atrule.params = globalMatch[1];
+ globalKeyframes = true;
+ } else if(localMatch) {
+ atrule.params = localMatch[0];
+ globalKeyframes = false;
+ } else if(!globalMode) {
+ atrule.params = ':local(' + atrule.params + ')';
+ }
+ atrule.walkDecls(function(decl) {
+ localizeDecl(decl, {
+ options: options,
+ global: globalKeyframes
+ });
+ });
+ } else if(atrule.nodes) {
+ atrule.nodes.forEach(function(decl) {
+ if(decl.type === 'decl') {
+ localizeDecl(decl, {
+ options: options,
+ global: globalMode
+ });
+ }
+ });
+ }
+ });
+ css.walkRules(function(rule) {
+ if(rule.parent.type === 'atrule' && /keyframes$/.test(rule.parent.name)) {
+ // ignore keyframe rules
+ return;
+ }
+ var selector = Tokenizer.parse(rule.selector);
+ var context = {
+ options: options,
+ global: globalMode,
+ hasPureGlobals: false
+ };
+ var newSelector;
+ try {
+ newSelector = localizeNode(selector, context);
+ } catch(e) {
+ throw rule.error(e.message);
+ }
+ if(pureMode && context.hasPureGlobals) {
+ throw rule.error('Selector "' + Tokenizer.stringify(selector) + '" is not pure ' +
+ '(pure selectors must contain at least one local class or id)');
+ }
+ // Less-syntax mixins parse as rules with no nodes
+ if (rule.nodes) {
+ rule.nodes.forEach(function(decl) {
+ localizeDecl(decl, context);
+ });
+ }
+ rule.selector = Tokenizer.stringify(newSelector);
+ });
+ };
+});