369 lines
9.5 KiB
JavaScript
369 lines
9.5 KiB
JavaScript
'use strict'
|
|
|
|
let { SourceMapConsumer, SourceMapGenerator } = require('source-map-js')
|
|
let { dirname, relative, resolve, 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
|
|
this.originalCSS = cssString
|
|
this.usesFileUrls = !this.mapOpts.from && this.mapOpts.absolute
|
|
|
|
this.memoizedFileURLs = new Map()
|
|
this.memoizedPaths = new Map()
|
|
this.memoizedURLs = new Map()
|
|
}
|
|
|
|
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 + ' */'
|
|
}
|
|
|
|
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 = null
|
|
}
|
|
} else {
|
|
map = prev.consumer()
|
|
}
|
|
|
|
this.map.applySourceMap(map, from, this.toUrl(this.path(root)))
|
|
}
|
|
}
|
|
|
|
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, '')
|
|
}
|
|
}
|
|
|
|
generate() {
|
|
this.clearAnnotation()
|
|
if (pathAvailable && sourceMapAvailable && this.isMap()) {
|
|
return this.generateMap()
|
|
} else {
|
|
let result = ''
|
|
this.stringify(this.root, i => {
|
|
result += i
|
|
})
|
|
return [result]
|
|
}
|
|
}
|
|
|
|
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, {
|
|
ignoreInvalidMapping: true
|
|
})
|
|
} else {
|
|
this.map = new SourceMapGenerator({
|
|
file: this.outputFile(),
|
|
ignoreInvalidMapping: true
|
|
})
|
|
this.map.addMapping({
|
|
generated: { column: 0, line: 1 },
|
|
original: { column: 0, line: 1 },
|
|
source: this.opts.from
|
|
? this.toUrl(this.path(this.opts.from))
|
|
: '<no source>'
|
|
})
|
|
}
|
|
|
|
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]
|
|
}
|
|
}
|
|
|
|
generateString() {
|
|
this.css = ''
|
|
this.map = new SourceMapGenerator({
|
|
file: this.outputFile(),
|
|
ignoreInvalidMapping: true
|
|
})
|
|
|
|
let line = 1
|
|
let column = 1
|
|
|
|
let noSource = '<no source>'
|
|
let mapping = {
|
|
generated: { column: 0, line: 0 },
|
|
original: { column: 0, line: 0 },
|
|
source: ''
|
|
}
|
|
|
|
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: {} }
|
|
let childless =
|
|
node.type === 'decl' || (node.type === 'atrule' && !node.nodes)
|
|
if (!childless || 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)
|
|
}
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
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
|
|
}
|
|
|
|
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
|
|
}
|
|
|
|
isMap() {
|
|
if (typeof this.opts.map !== 'undefined') {
|
|
return !!this.opts.map
|
|
}
|
|
return this.previous().length > 0
|
|
}
|
|
|
|
isSourcesContent() {
|
|
if (typeof this.mapOpts.sourcesContent !== 'undefined') {
|
|
return this.mapOpts.sourcesContent
|
|
}
|
|
if (this.previous().length) {
|
|
return this.previous().some(i => i.withContent())
|
|
}
|
|
return true
|
|
}
|
|
|
|
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'
|
|
}
|
|
}
|
|
|
|
path(file) {
|
|
if (this.mapOpts.absolute) return file
|
|
if (file.charCodeAt(0) === 60 /* `<` */) return file
|
|
if (/^\w+:\/\//.test(file)) return file
|
|
let cached = this.memoizedPaths.get(file)
|
|
if (cached) return cached
|
|
|
|
let from = this.opts.to ? dirname(this.opts.to) : '.'
|
|
|
|
if (typeof this.mapOpts.annotation === 'string') {
|
|
from = dirname(resolve(from, this.mapOpts.annotation))
|
|
}
|
|
|
|
let path = relative(from, file)
|
|
this.memoizedPaths.set(file, path)
|
|
|
|
return path
|
|
}
|
|
|
|
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.originalCSS, this.opts)
|
|
if (input.map) this.previousMaps.push(input.map)
|
|
}
|
|
}
|
|
|
|
return this.previousMaps
|
|
}
|
|
|
|
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
|
|
let fromUrl = this.usesFileUrls
|
|
? this.toFileUrl(from)
|
|
: this.toUrl(this.path(from))
|
|
this.map.setSourceContent(fromUrl, 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)
|
|
}
|
|
}
|
|
|
|
sourcePath(node) {
|
|
if (this.mapOpts.from) {
|
|
return this.toUrl(this.mapOpts.from)
|
|
} else if (this.usesFileUrls) {
|
|
return this.toFileUrl(node.source.input.from)
|
|
} else {
|
|
return this.toUrl(this.path(node.source.input.from))
|
|
}
|
|
}
|
|
|
|
toBase64(str) {
|
|
if (Buffer) {
|
|
return Buffer.from(str).toString('base64')
|
|
} else {
|
|
return window.btoa(unescape(encodeURIComponent(str)))
|
|
}
|
|
}
|
|
|
|
toFileUrl(path) {
|
|
let cached = this.memoizedFileURLs.get(path)
|
|
if (cached) return cached
|
|
|
|
if (pathToFileURL) {
|
|
let fileURL = pathToFileURL(path).toString()
|
|
this.memoizedFileURLs.set(path, fileURL)
|
|
|
|
return fileURL
|
|
} else {
|
|
throw new Error(
|
|
'`map.absolute` option is not available in this PostCSS build'
|
|
)
|
|
}
|
|
}
|
|
|
|
toUrl(path) {
|
|
let cached = this.memoizedURLs.get(path)
|
|
if (cached) return cached
|
|
|
|
if (sep === '\\') {
|
|
path = path.replace(/\\/g, '/')
|
|
}
|
|
|
|
let url = encodeURI(path).replace(/[#?]/g, encodeURIComponent)
|
|
this.memoizedURLs.set(path, url)
|
|
|
|
return url
|
|
}
|
|
}
|
|
|
|
module.exports = MapGenerator
|