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type CodegenResult,
type CompilerError,
type CompilerOptions,
type ElementNode,
type NodeTransform,
NodeTypes,
type ParserOptions,
type RawSourceMap,
type RootNode,
createRoot,
} from '@vue/compiler-core'
import { SourceMapConsumer, SourceMapGenerator } from 'source-map-js'
import {
type AssetURLOptions,
type AssetURLTagConfig,
createAssetUrlTransformWithOptions,
normalizeOptions,
transformAssetUrl,
} from './template/transformAssetUrl'
import {
createSrcsetTransformWithOptions,
transformSrcset,
} from './template/transformSrcset'
import { generateCodeFrame, isObject } from '@vue/shared'
import * as CompilerDOM from '@vue/compiler-dom'
import * as CompilerSSR from '@vue/compiler-ssr'
import consolidate from '@vue/consolidate'
import { warnOnce } from './warn'
import { genCssVarsFromList } from './style/cssVars'
export interface TemplateCompiler {
compile(source: string | RootNode, options: CompilerOptions): CodegenResult
parse(template: string, options: ParserOptions): RootNode
}
export interface SFCTemplateCompileResults {
code: string
ast?: RootNode
preamble?: string
source: string
tips: string[]
errors: (string | CompilerError)[]
map?: RawSourceMap
}
export interface SFCTemplateCompileOptions {
source: string
ast?: RootNode
filename: string
id: string
scoped?: boolean
slotted?: boolean
isProd?: boolean
ssr?: boolean
ssrCssVars?: string[]
inMap?: RawSourceMap
compiler?: TemplateCompiler
compilerOptions?: CompilerOptions
preprocessLang?: string
preprocessOptions?: any
/**
* In some cases, compiler-sfc may not be inside the project root (e.g. when
* linked or globally installed). In such cases a custom `require` can be
* passed to correctly resolve the preprocessors.
*/
preprocessCustomRequire?: (id: string) => any
/**
* Configure what tags/attributes to transform into asset url imports,
* or disable the transform altogether with `false`.
*/
transformAssetUrls?: AssetURLOptions | AssetURLTagConfig | boolean
}
interface PreProcessor {
render(
source: string,
options: any,
cb: (err: Error | null, res: string) => void,
): void
}
function preprocess(
{ source, filename, preprocessOptions }: SFCTemplateCompileOptions,
preprocessor: PreProcessor,
): string {
// Consolidate exposes a callback based API, but the callback is in fact
// called synchronously for most templating engines. In our case, we have to
// expose a synchronous API so that it is usable in Jest transforms (which
// have to be sync because they are applied via Node.js require hooks)
let res: string = ''
let err: Error | null = null
preprocessor.render(
source,
{ filename, ...preprocessOptions },
(_err, _res) => {
if (_err) err = _err
res = _res
},
)
if (err) throw err
return res
}
export function compileTemplate(
options: SFCTemplateCompileOptions,
): SFCTemplateCompileResults {
const { preprocessLang, preprocessCustomRequire } = options
if (
(__ESM_BROWSER__ || __GLOBAL__) &&
preprocessLang &&
!preprocessCustomRequire
) {
throw new Error(
`[@vue/compiler-sfc] Template preprocessing in the browser build must ` +
`provide the \`preprocessCustomRequire\` option to return the in-browser ` +
`version of the preprocessor in the shape of { render(): string }.`,
)
}
const preprocessor = preprocessLang
? preprocessCustomRequire
? preprocessCustomRequire(preprocessLang)
: __ESM_BROWSER__
? undefined
: consolidate[preprocessLang as keyof typeof consolidate]
: false
if (preprocessor) {
try {
return doCompileTemplate({
...options,
source: preprocess(options, preprocessor),
ast: undefined, // invalidate AST if template goes through preprocessor
})
} catch (e: any) {
return {
code: `export default function render() {}`,
source: options.source,
tips: [],
errors: [e],
}
}
} else if (preprocessLang) {
return {
code: `export default function render() {}`,
source: options.source,
tips: [
`Component ${options.filename} uses lang ${preprocessLang} for template. Please install the language preprocessor.`,
],
errors: [
`Component ${options.filename} uses lang ${preprocessLang} for template, however it is not installed.`,
],
}
} else {
return doCompileTemplate(options)
}
}
function doCompileTemplate({
filename,
id,
scoped,
slotted,
inMap,
source,
ast: inAST,
ssr = false,
ssrCssVars,
isProd = false,
compiler,
compilerOptions = {},
transformAssetUrls,
}: SFCTemplateCompileOptions): SFCTemplateCompileResults {
const errors: CompilerError[] = []
const warnings: CompilerError[] = []
let nodeTransforms: NodeTransform[] = []
if (isObject(transformAssetUrls)) {
const assetOptions = normalizeOptions(transformAssetUrls)
nodeTransforms = [
createAssetUrlTransformWithOptions(assetOptions),
createSrcsetTransformWithOptions(assetOptions),
]
} else if (transformAssetUrls !== false) {
nodeTransforms = [transformAssetUrl, transformSrcset]
}
if (ssr && !ssrCssVars) {
warnOnce(
`compileTemplate is called with \`ssr: true\` but no ` +
`corresponding \`cssVars\` option.`,
)
}
if (!id) {
warnOnce(`compileTemplate now requires the \`id\` option.`)
id = ''
}
const shortId = id.replace(/^data-v-/, '')
const longId = `data-v-${shortId}`
const defaultCompiler = ssr ? (CompilerSSR as TemplateCompiler) : CompilerDOM
compiler = compiler || defaultCompiler
if (compiler !== defaultCompiler) {
// user using custom compiler, this means we cannot reuse the AST from
// the descriptor as they might be different.
inAST = undefined
}
if (inAST?.transformed) {
// If input AST has already been transformed, then it cannot be reused.
// We need to parse a fresh one. Can't just use `source` here since we need
// the AST location info to be relative to the entire SFC.
const newAST = (ssr ? CompilerDOM : compiler).parse(inAST.source, {
prefixIdentifiers: true,
...compilerOptions,
parseMode: 'sfc',
onError: e => errors.push(e),
})
const template = newAST.children.find(
node => node.type === NodeTypes.ELEMENT && node.tag === 'template',
) as ElementNode
inAST = createRoot(template.children, inAST.source)
}
let { code, ast, preamble, map } = compiler.compile(inAST || source, {
mode: 'module',
prefixIdentifiers: true,
hoistStatic: true,
cacheHandlers: true,
ssrCssVars:
ssr && ssrCssVars && ssrCssVars.length
? genCssVarsFromList(ssrCssVars, shortId, isProd, true)
: '',
scopeId: scoped ? longId : undefined,
slotted,
sourceMap: true,
...compilerOptions,
hmr: !isProd,
nodeTransforms: nodeTransforms.concat(compilerOptions.nodeTransforms || []),
filename,
onError: e => errors.push(e),
onWarn: w => warnings.push(w),
})
// inMap should be the map produced by ./parse.ts which is a simple line-only
// mapping. If it is present, we need to adjust the final map and errors to
// reflect the original line numbers.
if (inMap && !inAST) {
if (map) {
map = mapLines(inMap, map)
}
if (errors.length) {
patchErrors(errors, source, inMap)
}
}
const tips = warnings.map(w => {
let msg = w.message
if (w.loc) {
msg += `\n${generateCodeFrame(
inAST?.source || source,
w.loc.start.offset,
w.loc.end.offset,
)}`
}
return msg
})
return { code, ast, preamble, source, errors, tips, map }
}
function mapLines(oldMap: RawSourceMap, newMap: RawSourceMap): RawSourceMap {
if (!oldMap) return newMap
if (!newMap) return oldMap
const oldMapConsumer = new SourceMapConsumer(oldMap)
const newMapConsumer = new SourceMapConsumer(newMap)
const mergedMapGenerator = new SourceMapGenerator()
newMapConsumer.eachMapping(m => {
if (m.originalLine == null) {
return
}
const origPosInOldMap = oldMapConsumer.originalPositionFor({
line: m.originalLine,
column: m.originalColumn,
})
if (origPosInOldMap.source == null) {
return
}
mergedMapGenerator.addMapping({
generated: {
line: m.generatedLine,
column: m.generatedColumn,
},
original: {
line: origPosInOldMap.line, // map line
// use current column, since the oldMap produced by @vue/compiler-sfc
// does not
column: m.originalColumn,
},
source: origPosInOldMap.source,
name: origPosInOldMap.name,
})
})
// source-map's type definition is incomplete
const generator = mergedMapGenerator as any
;(oldMapConsumer as any).sources.forEach((sourceFile: string) => {
generator._sources.add(sourceFile)
const sourceContent = oldMapConsumer.sourceContentFor(sourceFile)
if (sourceContent != null) {
mergedMapGenerator.setSourceContent(sourceFile, sourceContent)
}
})
generator._sourceRoot = oldMap.sourceRoot
generator._file = oldMap.file
return generator.toJSON()
}
function patchErrors(
errors: CompilerError[],
source: string,
inMap: RawSourceMap,
) {
const originalSource = inMap.sourcesContent![0]
const offset = originalSource.indexOf(source)
const lineOffset = originalSource.slice(0, offset).split(/\r?\n/).length - 1
errors.forEach(err => {
if (err.loc) {
err.loc.start.line += lineOffset
err.loc.start.offset += offset
if (err.loc.end !== err.loc.start) {
err.loc.end.line += lineOffset
err.loc.end.offset += offset
}
}
})
}
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