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402x 399x 399x 402x 7x 7x 1x 6x 6x 6x 28x 11x 11x 28x 28x 6x 6x 2x 2x 4x 4x 4x 21x 4x 4x 4x 4x 4x | import { type BindingMetadata, type CodegenSourceMapGenerator, type CompilerError, type ElementNode, NodeTypes, type ParserOptions, type RawSourceMap, type RootNode, type SourceLocation, createRoot, } from '@vue/compiler-core' import * as CompilerDOM from '@vue/compiler-dom' import { SourceMapGenerator } from 'source-map-js' import type { TemplateCompiler } from './compileTemplate' import { parseCssVars } from './style/cssVars' import { createCache } from './cache' import type { ImportBinding } from './compileScript' import { isImportUsed } from './script/importUsageCheck' import type { LRUCache } from 'lru-cache' import { genCacheKey } from '@vue/shared' export const DEFAULT_FILENAME = 'anonymous.vue' export interface SFCParseOptions { filename?: string sourceMap?: boolean sourceRoot?: string pad?: boolean | 'line' | 'space' ignoreEmpty?: boolean compiler?: TemplateCompiler templateParseOptions?: ParserOptions } export interface SFCBlock { type: string content: string attrs: Record<string, string | true> loc: SourceLocation map?: RawSourceMap lang?: string src?: string } export interface SFCTemplateBlock extends SFCBlock { type: 'template' ast?: RootNode } export interface SFCScriptBlock extends SFCBlock { type: 'script' setup?: string | boolean bindings?: BindingMetadata imports?: Record<string, ImportBinding> scriptAst?: import('@babel/types').Statement[] scriptSetupAst?: import('@babel/types').Statement[] warnings?: string[] /** * Fully resolved dependency file paths (unix slashes) with imported types * used in macros, used for HMR cache busting in @vitejs/plugin-vue and * vue-loader. */ deps?: string[] } export interface SFCStyleBlock extends SFCBlock { type: 'style' scoped?: boolean module?: string | boolean } export interface SFCDescriptor { filename: string source: string template: SFCTemplateBlock | null script: SFCScriptBlock | null scriptSetup: SFCScriptBlock | null styles: SFCStyleBlock[] customBlocks: SFCBlock[] cssVars: string[] /** * whether the SFC uses :slotted() modifier. * this is used as a compiler optimization hint. */ slotted: boolean /** * compare with an existing descriptor to determine whether HMR should perform * a reload vs. re-render. * * Note: this comparison assumes the prev/next script are already identical, * and only checks the special case where <script setup lang="ts"> unused import * pruning result changes due to template changes. */ shouldForceReload: (prevImports: Record<string, ImportBinding>) => boolean } export interface SFCParseResult { descriptor: SFCDescriptor errors: (CompilerError | SyntaxError)[] } export const parseCache: | Map<string, SFCParseResult> | LRUCache<string, SFCParseResult> = createCache<SFCParseResult>() export function parse( source: string, options: SFCParseOptions = {}, ): SFCParseResult { const sourceKey = genCacheKey(source, { ...options, compiler: { parse: options.compiler?.parse }, }) const cache = parseCache.get(sourceKey) if (cache) { return cache } const { sourceMap = true, filename = DEFAULT_FILENAME, sourceRoot = '', pad = false, ignoreEmpty = true, compiler = CompilerDOM, templateParseOptions = {}, } = options const descriptor: SFCDescriptor = { filename, source, template: null, script: null, scriptSetup: null, styles: [], customBlocks: [], cssVars: [], slotted: false, shouldForceReload: prevImports => hmrShouldReload(prevImports, descriptor), } const errors: (CompilerError | SyntaxError)[] = [] const ast = compiler.parse(source, { parseMode: 'sfc', prefixIdentifiers: true, ...templateParseOptions, onError: e => { errors.push(e) }, }) ast.children.forEach(node => { if (node.type !== NodeTypes.ELEMENT) { return } // we only want to keep the nodes that are not empty // (when the tag is not a template) if ( ignoreEmpty && node.tag !== 'template' && isEmpty(node) && !hasSrc(node) ) { return } switch (node.tag) { case 'template': if (!descriptor.template) { const templateBlock = (descriptor.template = createBlock( node, source, false, ) as SFCTemplateBlock) if (!templateBlock.attrs.src) { templateBlock.ast = createRoot(node.children, source) } // warn against 2.x <template functional> if (templateBlock.attrs.functional) { const err = new SyntaxError( `<template functional> is no longer supported in Vue 3, since ` + `functional components no longer have significant performance ` + `difference from stateful ones. Just use a normal <template> ` + `instead.`, ) as CompilerError err.loc = node.props.find( p => p.type === NodeTypes.ATTRIBUTE && p.name === 'functional', )!.loc errors.push(err) } } else { errors.push(createDuplicateBlockError(node)) } break case 'script': const scriptBlock = createBlock(node, source, pad) as SFCScriptBlock const isSetup = !!scriptBlock.attrs.setup if (isSetup && !descriptor.scriptSetup) { descriptor.scriptSetup = scriptBlock break } if (!isSetup && !descriptor.script) { descriptor.script = scriptBlock break } errors.push(createDuplicateBlockError(node, isSetup)) break case 'style': const styleBlock = createBlock(node, source, pad) as SFCStyleBlock if (styleBlock.attrs.vars) { errors.push( new SyntaxError( `<style vars> has been replaced by a new proposal: ` + `https://github.com/vuejs/rfcs/pull/231`, ), ) } descriptor.styles.push(styleBlock) break default: descriptor.customBlocks.push(createBlock(node, source, pad)) break } }) if (!descriptor.template && !descriptor.script && !descriptor.scriptSetup) { errors.push( new SyntaxError( `At least one <template> or <script> is required in a single file component. ${descriptor.filename}`, ), ) } if (descriptor.scriptSetup) { if (descriptor.scriptSetup.src) { errors.push( new SyntaxError( `<script setup> cannot use the "src" attribute because ` + `its syntax will be ambiguous outside of the component.`, ), ) descriptor.scriptSetup = null } if (descriptor.script && descriptor.script.src) { errors.push( new SyntaxError( `<script> cannot use the "src" attribute when <script setup> is ` + `also present because they must be processed together.`, ), ) descriptor.script = null } } // dedent pug/jade templates let templateColumnOffset = 0 if ( descriptor.template && (descriptor.template.lang === 'pug' || descriptor.template.lang === 'jade') ) { ;[descriptor.template.content, templateColumnOffset] = dedent( descriptor.template.content, ) } if (sourceMap) { const genMap = (block: SFCBlock | null, columnOffset = 0) => { if (block && !block.src) { block.map = generateSourceMap( filename, source, block.content, sourceRoot, !pad || block.type === 'template' ? block.loc.start.line - 1 : 0, columnOffset, ) } } genMap(descriptor.template, templateColumnOffset) genMap(descriptor.script) descriptor.styles.forEach(s => genMap(s)) descriptor.customBlocks.forEach(s => genMap(s)) } // parse CSS vars descriptor.cssVars = parseCssVars(descriptor) // check if the SFC uses :slotted const slottedRE = /(?:::v-|:)slotted\(/ descriptor.slotted = descriptor.styles.some( s => s.scoped && slottedRE.test(s.content), ) const result = { descriptor, errors, } parseCache.set(sourceKey, result) return result } function createDuplicateBlockError( node: ElementNode, isScriptSetup = false, ): CompilerError { const err = new SyntaxError( `Single file component can contain only one <${node.tag}${ isScriptSetup ? ` setup` : `` }> element`, ) as CompilerError err.loc = node.loc return err } function createBlock( node: ElementNode, source: string, pad: SFCParseOptions['pad'], ): SFCBlock { const type = node.tag const loc = node.innerLoc! const attrs: Record<string, string | true> = {} const block: SFCBlock = { type, content: source.slice(loc.start.offset, loc.end.offset), loc, attrs, } if (pad) { block.content = padContent(source, block, pad) + block.content } node.props.forEach(p => { if (p.type === NodeTypes.ATTRIBUTE) { const name = p.name attrs[name] = p.value ? p.value.content || true : true if (name === 'lang') { block.lang = p.value && p.value.content } else if (name === 'src') { block.src = p.value && p.value.content } else if (type === 'style') { if (name === 'scoped') { ;(block as SFCStyleBlock).scoped = true } else if (name === 'module') { ;(block as SFCStyleBlock).module = attrs[name] } } else if (type === 'script' && name === 'setup') { ;(block as SFCScriptBlock).setup = attrs.setup } } }) return block } const splitRE = /\r?\n/g const emptyRE = /^(?:\/\/)?\s*$/ const replaceRE = /./g function generateSourceMap( filename: string, source: string, generated: string, sourceRoot: string, lineOffset: number, columnOffset: number, ): RawSourceMap { const map = new SourceMapGenerator({ file: filename.replace(/\\/g, '/'), sourceRoot: sourceRoot.replace(/\\/g, '/'), }) as unknown as CodegenSourceMapGenerator map.setSourceContent(filename, source) map._sources.add(filename) generated.split(splitRE).forEach((line, index) => { if (!emptyRE.test(line)) { const originalLine = index + 1 + lineOffset const generatedLine = index + 1 for (let i = 0; i < line.length; i++) { if (!/\s/.test(line[i])) { map._mappings.add({ originalLine, originalColumn: i + columnOffset, generatedLine, generatedColumn: i, source: filename, name: null, }) } } } }) return map.toJSON() } function padContent( content: string, block: SFCBlock, pad: SFCParseOptions['pad'], ): string { content = content.slice(0, block.loc.start.offset) if (pad === 'space') { return content.replace(replaceRE, ' ') } else { const offset = content.split(splitRE).length const padChar = block.type === 'script' && !block.lang ? '//\n' : '\n' return Array(offset).join(padChar) } } function hasSrc(node: ElementNode) { return node.props.some(p => { if (p.type !== NodeTypes.ATTRIBUTE) { return false } return p.name === 'src' }) } /** * Returns true if the node has no children * once the empty text nodes (trimmed content) have been filtered out. */ function isEmpty(node: ElementNode) { for (let i = 0; i < node.children.length; i++) { const child = node.children[i] if (child.type !== NodeTypes.TEXT || child.content.trim() !== '') { return false } } return true } /** * Note: this comparison assumes the prev/next script are already identical, * and only checks the special case where <script setup lang="ts"> unused import * pruning result changes due to template changes. */ export function hmrShouldReload( prevImports: Record<string, ImportBinding>, next: SFCDescriptor, ): boolean { if ( !next.scriptSetup || (next.scriptSetup.lang !== 'ts' && next.scriptSetup.lang !== 'tsx') ) { return false } // for each previous import, check if its used status remain the same based on // the next descriptor's template for (const key in prevImports) { // if an import was previous unused, but now is used, we need to force // reload so that the script now includes that import. if (!prevImports[key].isUsedInTemplate && isImportUsed(key, next)) { return true } } return false } /** * Dedent a string. * * This removes any whitespace that is common to all lines in the string from * each line in the string. */ function dedent(s: string): [string, number] { const lines = s.split('\n') const minIndent = lines.reduce(function (minIndent, line) { if (line.trim() === '') { return minIndent } const indent = line.match(/^\s*/)?.[0]?.length || 0 return Math.min(indent, minIndent) }, Infinity) if (minIndent === 0) { return [s, minIndent] } return [ lines .map(function (line) { return line.slice(minIndent) }) .join('\n'), minIndent, ] } |