2 lines
9.4 KiB
JavaScript
2 lines
9.4 KiB
JavaScript
"use strict";function _interopDefault(e){return e&&"object"==typeof e&&"default"in e?e.default:e}function _interopNamespace(e){if(e&&e.__esModule)return e;var t={};return e&&Object.keys(e).forEach((function(s){var r=Object.getOwnPropertyDescriptor(e,s);Object.defineProperty(t,s,r.get?r:{enumerable:!0,get:function(){return e[s]}})})),t.default=e,t}Object.defineProperty(exports,"__esModule",{value:!0});var postcss=require("postcss"),selectorParser=_interopDefault(require("postcss-selector-parser")),fs=require("fs"),util=require("util"),glob=_interopDefault(require("glob")),path=_interopDefault(require("path"));const defaultOptions={css:[],content:[],defaultExtractor:e=>e.match(/[A-Za-z0-9_-]+/g)||[],extractors:[],fontFace:!1,keyframes:!1,rejected:!1,stdin:!1,stdout:!1,variables:!1,whitelist:[],whitelistPatterns:[],whitelistPatternsChildren:[]},IGNORE_ANNOTATION_CURRENT="purgecss ignore current",IGNORE_ANNOTATION_NEXT="purgecss ignore",IGNORE_ANNOTATION_START="purgecss start ignore",IGNORE_ANNOTATION_END="purgecss end ignore",CONFIG_FILENAME="purgecss.config.js",ERROR_CONFIG_FILE_LOADING="Error loading the config file",CSS_WHITELIST=["*","::-webkit-scrollbar","::selection",":root","::before","::after"];class VariableNode{constructor(e){this.nodes=[],this.isUsed=!1,this.value=e}}class VariablesStructure{constructor(){this.nodes=new Map,this.usedVariables=new Set}addVariable(e){const{prop:t}=e;if(!this.nodes.has(t)){const s=new VariableNode(e);this.nodes.set(t,s)}}addVariableUsage(e,t){const{prop:s}=e,r=this.nodes.get(s);for(const e of t){const t=e[1];if(this.nodes.has(t)){const e=this.nodes.get(t);r.nodes.push(e)}}}addVariableUsageInProperties(e){for(const t of e){const e=t[1];this.usedVariables.add(e)}}setAsUsed(e){const t=[this.nodes.get(e)];for(;0!==t.length;){const e=t.pop();e.isUsed||(e.isUsed=!0,t.push(...e.nodes))}}removeUnused(){for(const e of this.usedVariables)this.setAsUsed(e);for(const[,e]of this.nodes)e.isUsed||e.value.remove()}}const asyncFs={access:util.promisify(fs.access),readFile:util.promisify(fs.readFile)};async function setOptions(e=CONFIG_FILENAME){let t;try{const s=path.join(process.cwd(),e);t=await new Promise((function(e){e(_interopNamespace(require(s)))}))}catch(e){throw new Error(`${ERROR_CONFIG_FILE_LOADING} ${e.message}`)}return{...defaultOptions,...t}}function extractSelectors(e,t){const s=t(e);return Array.isArray(s)?{attributes:{names:[],values:[]},classes:[],ids:[],tags:[],undetermined:s}:s}function isIgnoreAnnotation(e,t){switch(t){case"next":return e.text.includes("purgecss ignore");case"start":return e.text.includes("purgecss start ignore");case"end":return e.text.includes("purgecss end ignore")}}function isRuleEmpty(e){return!!("rule"===e.type&&!e.selector||e.nodes&&!e.nodes.length||"atrule"===e.type&&(!e.nodes&&!e.params||!e.params&&e.nodes&&!e.nodes.length))}function hasIgnoreAnnotation(e){let t=!1;return e.walkComments(e=>{e&&"comment"===e.type&&e.text.includes("purgecss ignore current")&&(t=!0,e.remove())}),t}function mergeExtractorSelectors(e,t){return{attributes:{names:[...e.attributes.names,...t.attributes.names],values:[...e.attributes.values,...t.attributes.values]},classes:[...e.classes,...t.classes],ids:[...e.ids,...t.ids],tags:[...e.tags,...t.tags],undetermined:[...e.undetermined,...t.undetermined]}}function stripQuotes(e){return e.replace(/(^["'])|(["']$)/g,"")}function isAttributeFound(e,t){if(!t.attributes.names.includes(e.attribute)&&!t.undetermined.includes(e.attribute))return!1;switch(e.operator){case"$=":return t.attributes.values.some(t=>t.endsWith(e.value))||t.undetermined.some(t=>t.endsWith(e.value));case"~=":case"*=":return t.attributes.values.some(t=>t.includes(e.value))||t.undetermined.some(t=>t.includes(e.value));case"=":return t.attributes.values.some(t=>t===e.value)||t.undetermined.some(t=>t===e.value);case"|=":case"^=":return t.attributes.values.some(t=>t.startsWith(e.value))||t.undetermined.some(t=>t.startsWith(e.value));default:return!0}}function isClassFound(e,t){return t.classes.includes(e.value)||t.undetermined.includes(e.value)}function isIdentifierFound(e,t){return t.ids.includes(e.value)||t.undetermined.includes(e.value)}function isTagFound(e,t){return t.tags.includes(e.value)||t.undetermined.includes(e.value)}function isInPseudoClass(e){return e.parent&&"pseudo"===e.parent.type&&e.parent.value.startsWith(":")}function matchAll(e,t){const s=[];return e.replace(t,(function(){const t=Array.prototype.slice.call(arguments,0,-2);return t.input=arguments[arguments.length-1],t.index=arguments[arguments.length-2],s.push(t),e})),s}class PurgeCSS{constructor(){this.ignore=!1,this.atRules={fontFace:[],keyframes:[]},this.usedAnimations=new Set,this.usedFontFaces=new Set,this.selectorsRemoved=new Set,this.variablesStructure=new VariablesStructure,this.options=defaultOptions}collectDeclarationsData(e){const{prop:t,value:s}=e;if(this.options.variables){const r=matchAll(s,/var\((.+?)[\,)]/g);t.startsWith("--")?(this.variablesStructure.addVariable(e),r.length>0&&this.variablesStructure.addVariableUsage(e,r)):r.length>0&&this.variablesStructure.addVariableUsageInProperties(r)}if(!this.options.keyframes||"animation"!==t&&"animation-name"!==t)if(this.options.fontFace){if("font-family"===t)for(const e of s.split(",")){const t=stripQuotes(e.trim());this.usedFontFaces.add(t)}}else;else for(const e of s.split(/[\s,]+/))this.usedAnimations.add(e)}getFileExtractor(e,t){const s=t.find(t=>t.extensions.find(t=>e.endsWith(t)));return void 0===s?this.options.defaultExtractor:s.extractor}async extractSelectorsFromFiles(e,t){let s={attributes:{names:[],values:[]},classes:[],ids:[],tags:[],undetermined:[]};for(const r of e){let e=[];try{await asyncFs.access(r,fs.constants.F_OK),e.push(r)}catch(t){e=glob.sync(r)}for(const r of e){s=mergeExtractorSelectors(s,extractSelectors(await asyncFs.readFile(r,"utf-8"),this.getFileExtractor(r,t)))}}return s}extractSelectorsFromString(e,t){let s={attributes:{names:[],values:[]},classes:[],ids:[],tags:[],undetermined:[]};for(const{raw:r,extension:n}of e){s=mergeExtractorSelectors(s,extractSelectors(r,this.getFileExtractor(`.${n}`,t)))}return s}evaluateAtRule(e){if(this.options.keyframes&&e.name.endsWith("keyframes"))this.atRules.keyframes.push(e);else if(this.options.fontFace&&"font-face"===e.name&&e.nodes)for(const t of e.nodes)"decl"===t.type&&"font-family"===t.prop&&this.atRules.fontFace.push({name:stripQuotes(t.value),node:e})}async evaluateRule(e,t){if(this.ignore)return;const s=e.prev();if(s&&"comment"===s.type&&isIgnoreAnnotation(s,"next"))return void s.remove();if(e.parent&&"atrule"===e.parent.type&&"keyframes"===e.parent.name)return;if("rule"!==e.type)return;if(hasIgnoreAnnotation(e))return;let r=!0;if(e.selector=selectorParser(e=>{e.walk(e=>{"selector"===e.type&&(r=this.shouldKeepSelector(e,t),r||(this.options.rejected&&this.selectorsRemoved.add(e.toString()),e.remove()))})}).processSync(e.selector),r&&void 0!==e.nodes)for(const t of e.nodes)"decl"===t.type&&this.collectDeclarationsData(t);const n=e.parent;e.selector||e.remove(),isRuleEmpty(n)&&n.remove()}async getPurgedCSS(e,t){const s=[],r=[];for(const t of e)"string"==typeof t?r.push(...glob.sync(t)):r.push(t);for(const e of r){const r="string"==typeof e?this.options.stdin?e:await asyncFs.readFile(e,"utf-8"):e.raw,n=postcss.parse(r);this.walkThroughCSS(n,t),this.options.fontFace&&this.removeUnusedFontFaces(),this.options.keyframes&&this.removeUnusedKeyframes(),this.options.variables&&this.removeUnusedCSSVariables();const i={css:n.toString(),file:"string"==typeof e?e:void 0};"string"==typeof e&&(i.file=e),this.options.rejected&&(i.rejected=Array.from(this.selectorsRemoved),this.selectorsRemoved.clear()),s.push(i)}return s}isSelectorWhitelisted(e){return CSS_WHITELIST.includes(e)||this.options.whitelist&&this.options.whitelist.some(t=>t===e)||this.options.whitelistPatterns&&this.options.whitelistPatterns.some(t=>t.test(e))}isSelectorWhitelistedChildren(e){return this.options.whitelistPatternsChildren&&this.options.whitelistPatternsChildren.some(t=>t.test(e))}async purge(e){this.options="object"!=typeof e?await setOptions(e):{...defaultOptions,...e};const{content:t,css:s,extractors:r}=this.options,n=t.filter(e=>"string"==typeof e),i=t.filter(e=>"object"==typeof e),o=await this.extractSelectorsFromFiles(n,r),a=this.extractSelectorsFromString(i,r);return this.getPurgedCSS(s,mergeExtractorSelectors(o,a))}removeUnusedCSSVariables(){this.variablesStructure.removeUnused()}removeUnusedFontFaces(){for(const{name:e,node:t}of this.atRules.fontFace)this.usedFontFaces.has(e)||t.remove()}removeUnusedKeyframes(){for(const e of this.atRules.keyframes)this.usedAnimations.has(e.params)||e.remove()}shouldKeepSelector(e,t){if(isInPseudoClass(e))return!0;let s=!1;for(const r of e.nodes){const e="attribute"===r.type&&r.attribute||r.value;if(e&&this.isSelectorWhitelistedChildren(e))return!0;if(e&&(CSS_WHITELIST.includes(e)||this.isSelectorWhitelisted(e)))s=!0;else{switch(r.type){case"attribute":s=!!["value","checked","selected","open"].includes(r.attribute)||isAttributeFound(r,t);break;case"class":s=isClassFound(r,t);break;case"id":s=isIdentifierFound(r,t);break;case"tag":s=isTagFound(r,t)}if(!s)return!1}}return s}walkThroughCSS(e,t){e.walk(e=>"rule"===e.type?this.evaluateRule(e,t):"atrule"===e.type?this.evaluateAtRule(e):void("comment"===e.type&&(isIgnoreAnnotation(e,"start")?(this.ignore=!0,e.remove()):isIgnoreAnnotation(e,"end")&&(this.ignore=!1,e.remove()))))}}exports.PurgeCSS=PurgeCSS,exports.default=PurgeCSS,exports.defaultOptions=defaultOptions,exports.mergeExtractorSelectors=mergeExtractorSelectors,exports.setOptions=setOptions;
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