| 'use strict' |
| |
| let { SourceMapConsumer, SourceMapGenerator } = require('source-map-js') |
| let { dirname, resolve, relative, sep } = require('path') |
| let { pathToFileURL } = require('url') |
| |
| let Input = require('./input') |
| |
| let sourceMapAvailable = Boolean(SourceMapConsumer && SourceMapGenerator) |
| let pathAvailable = Boolean(dirname && resolve && relative && sep) |
| |
| class MapGenerator { |
| constructor(stringify, root, opts, cssString) { |
| this.stringify = stringify |
| this.mapOpts = opts.map || {} |
| this.root = root |
| this.opts = opts |
| this.css = cssString |
| } |
| |
| isMap() { |
| if (typeof this.opts.map !== 'undefined') { |
| return !!this.opts.map |
| } |
| return this.previous().length > 0 |
| } |
| |
| previous() { |
| if (!this.previousMaps) { |
| this.previousMaps = [] |
| if (this.root) { |
| this.root.walk(node => { |
| if (node.source && node.source.input.map) { |
| let map = node.source.input.map |
| if (!this.previousMaps.includes(map)) { |
| this.previousMaps.push(map) |
| } |
| } |
| }) |
| } else { |
| let input = new Input(this.css, this.opts) |
| if (input.map) this.previousMaps.push(input.map) |
| } |
| } |
| |
| return this.previousMaps |
| } |
| |
| isInline() { |
| if (typeof this.mapOpts.inline !== 'undefined') { |
| return this.mapOpts.inline |
| } |
| |
| let annotation = this.mapOpts.annotation |
| if (typeof annotation !== 'undefined' && annotation !== true) { |
| return false |
| } |
| |
| if (this.previous().length) { |
| return this.previous().some(i => i.inline) |
| } |
| return true |
| } |
| |
| isSourcesContent() { |
| if (typeof this.mapOpts.sourcesContent !== 'undefined') { |
| return this.mapOpts.sourcesContent |
| } |
| if (this.previous().length) { |
| return this.previous().some(i => i.withContent()) |
| } |
| return true |
| } |
| |
| clearAnnotation() { |
| if (this.mapOpts.annotation === false) return |
| |
| if (this.root) { |
| let node |
| for (let i = this.root.nodes.length - 1; i >= 0; i--) { |
| node = this.root.nodes[i] |
| if (node.type !== 'comment') continue |
| if (node.text.indexOf('# sourceMappingURL=') === 0) { |
| this.root.removeChild(i) |
| } |
| } |
| } else if (this.css) { |
| this.css = this.css.replace(/(\n)?\/\*#[\S\s]*?\*\/$/gm, '') |
| } |
| } |
| |
| setSourcesContent() { |
| let already = {} |
| if (this.root) { |
| this.root.walk(node => { |
| if (node.source) { |
| let from = node.source.input.from |
| if (from && !already[from]) { |
| already[from] = true |
| this.map.setSourceContent( |
| this.toUrl(this.path(from)), |
| node.source.input.css |
| ) |
| } |
| } |
| }) |
| } else if (this.css) { |
| let from = this.opts.from |
| ? this.toUrl(this.path(this.opts.from)) |
| : '<no source>' |
| this.map.setSourceContent(from, this.css) |
| } |
| } |
| |
| applyPrevMaps() { |
| for (let prev of this.previous()) { |
| let from = this.toUrl(this.path(prev.file)) |
| let root = prev.root || dirname(prev.file) |
| let map |
| |
| if (this.mapOpts.sourcesContent === false) { |
| map = new SourceMapConsumer(prev.text) |
| if (map.sourcesContent) { |
| map.sourcesContent = map.sourcesContent.map(() => null) |
| } |
| } else { |
| map = prev.consumer() |
| } |
| |
| this.map.applySourceMap(map, from, this.toUrl(this.path(root))) |
| } |
| } |
| |
| isAnnotation() { |
| if (this.isInline()) { |
| return true |
| } |
| if (typeof this.mapOpts.annotation !== 'undefined') { |
| return this.mapOpts.annotation |
| } |
| if (this.previous().length) { |
| return this.previous().some(i => i.annotation) |
| } |
| return true |
| } |
| |
| toBase64(str) { |
| if (Buffer) { |
| return Buffer.from(str).toString('base64') |
| } else { |
| return window.btoa(unescape(encodeURIComponent(str))) |
| } |
| } |
| |
| addAnnotation() { |
| let content |
| |
| if (this.isInline()) { |
| content = |
| 'data:application/json;base64,' + this.toBase64(this.map.toString()) |
| } else if (typeof this.mapOpts.annotation === 'string') { |
| content = this.mapOpts.annotation |
| } else if (typeof this.mapOpts.annotation === 'function') { |
| content = this.mapOpts.annotation(this.opts.to, this.root) |
| } else { |
| content = this.outputFile() + '.map' |
| } |
| let eol = '\n' |
| if (this.css.includes('\r\n')) eol = '\r\n' |
| |
| this.css += eol + '/*# sourceMappingURL=' + content + ' */' |
| } |
| |
| outputFile() { |
| if (this.opts.to) { |
| return this.path(this.opts.to) |
| } else if (this.opts.from) { |
| return this.path(this.opts.from) |
| } else { |
| return 'to.css' |
| } |
| } |
| |
| generateMap() { |
| if (this.root) { |
| this.generateString() |
| } else if (this.previous().length === 1) { |
| let prev = this.previous()[0].consumer() |
| prev.file = this.outputFile() |
| this.map = SourceMapGenerator.fromSourceMap(prev) |
| } else { |
| this.map = new SourceMapGenerator({ file: this.outputFile() }) |
| this.map.addMapping({ |
| source: this.opts.from |
| ? this.toUrl(this.path(this.opts.from)) |
| : '<no source>', |
| generated: { line: 1, column: 0 }, |
| original: { line: 1, column: 0 } |
| }) |
| } |
| |
| if (this.isSourcesContent()) this.setSourcesContent() |
| if (this.root && this.previous().length > 0) this.applyPrevMaps() |
| if (this.isAnnotation()) this.addAnnotation() |
| |
| if (this.isInline()) { |
| return [this.css] |
| } else { |
| return [this.css, this.map] |
| } |
| } |
| |
| path(file) { |
| if (file.indexOf('<') === 0) return file |
| if (/^\w+:\/\//.test(file)) return file |
| if (this.mapOpts.absolute) return file |
| |
| let from = this.opts.to ? dirname(this.opts.to) : '.' |
| |
| if (typeof this.mapOpts.annotation === 'string') { |
| from = dirname(resolve(from, this.mapOpts.annotation)) |
| } |
| |
| file = relative(from, file) |
| return file |
| } |
| |
| toUrl(path) { |
| if (sep === '\\') { |
| path = path.replace(/\\/g, '/') |
| } |
| return encodeURI(path).replace(/[#?]/g, encodeURIComponent) |
| } |
| |
| sourcePath(node) { |
| if (this.mapOpts.from) { |
| return this.toUrl(this.mapOpts.from) |
| } else if (this.mapOpts.absolute) { |
| if (pathToFileURL) { |
| return pathToFileURL(node.source.input.from).toString() |
| } else { |
| throw new Error( |
| '`map.absolute` option is not available in this PostCSS build' |
| ) |
| } |
| } else { |
| return this.toUrl(this.path(node.source.input.from)) |
| } |
| } |
| |
| generateString() { |
| this.css = '' |
| this.map = new SourceMapGenerator({ file: this.outputFile() }) |
| |
| let line = 1 |
| let column = 1 |
| |
| let noSource = '<no source>' |
| let mapping = { |
| source: '', |
| generated: { line: 0, column: 0 }, |
| original: { line: 0, column: 0 } |
| } |
| |
| let lines, last |
| this.stringify(this.root, (str, node, type) => { |
| this.css += str |
| |
| if (node && type !== 'end') { |
| mapping.generated.line = line |
| mapping.generated.column = column - 1 |
| if (node.source && node.source.start) { |
| mapping.source = this.sourcePath(node) |
| mapping.original.line = node.source.start.line |
| mapping.original.column = node.source.start.column - 1 |
| this.map.addMapping(mapping) |
| } else { |
| mapping.source = noSource |
| mapping.original.line = 1 |
| mapping.original.column = 0 |
| this.map.addMapping(mapping) |
| } |
| } |
| |
| lines = str.match(/\n/g) |
| if (lines) { |
| line += lines.length |
| last = str.lastIndexOf('\n') |
| column = str.length - last |
| } else { |
| column += str.length |
| } |
| |
| if (node && type !== 'start') { |
| let p = node.parent || { raws: {} } |
| if (node.type !== 'decl' || node !== p.last || p.raws.semicolon) { |
| if (node.source && node.source.end) { |
| mapping.source = this.sourcePath(node) |
| mapping.original.line = node.source.end.line |
| mapping.original.column = node.source.end.column - 1 |
| mapping.generated.line = line |
| mapping.generated.column = column - 2 |
| this.map.addMapping(mapping) |
| } else { |
| mapping.source = noSource |
| mapping.original.line = 1 |
| mapping.original.column = 0 |
| mapping.generated.line = line |
| mapping.generated.column = column - 1 |
| this.map.addMapping(mapping) |
| } |
| } |
| } |
| }) |
| } |
| |
| generate() { |
| this.clearAnnotation() |
| if (pathAvailable && sourceMapAvailable && this.isMap()) { |
| return this.generateMap() |
| } else { |
| let result = '' |
| this.stringify(this.root, i => { |
| result += i |
| }) |
| return [result] |
| } |
| } |
| } |
| |
| module.exports = MapGenerator |
