450 lines
10 KiB
JavaScript
450 lines
10 KiB
JavaScript
'use strict'
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let CssSyntaxError = require('./css-syntax-error')
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let Stringifier = require('./stringifier')
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let stringify = require('./stringify')
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let { isClean, my } = require('./symbols')
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function cloneNode(obj, parent) {
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let cloned = new obj.constructor()
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for (let i in obj) {
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if (!Object.prototype.hasOwnProperty.call(obj, i)) {
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/* c8 ignore next 2 */
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continue
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}
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if (i === 'proxyCache') continue
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let value = obj[i]
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let type = typeof value
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if (i === 'parent' && type === 'object') {
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if (parent) cloned[i] = parent
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} else if (i === 'source') {
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cloned[i] = value
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} else if (Array.isArray(value)) {
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cloned[i] = value.map(j => cloneNode(j, cloned))
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} else {
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if (type === 'object' && value !== null) value = cloneNode(value)
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cloned[i] = value
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}
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}
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return cloned
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}
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function sourceOffset(inputCSS, position) {
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// Not all custom syntaxes support `offset` in `source.start` and `source.end`
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if (position && typeof position.offset !== 'undefined') {
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return position.offset
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}
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let column = 1
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let line = 1
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let offset = 0
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for (let i = 0; i < inputCSS.length; i++) {
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if (line === position.line && column === position.column) {
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offset = i
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break
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}
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if (inputCSS[i] === '\n') {
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column = 1
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line += 1
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} else {
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column += 1
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}
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}
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return offset
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}
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class Node {
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get proxyOf() {
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return this
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}
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constructor(defaults = {}) {
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this.raws = {}
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this[isClean] = false
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this[my] = true
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for (let name in defaults) {
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if (name === 'nodes') {
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this.nodes = []
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for (let node of defaults[name]) {
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if (typeof node.clone === 'function') {
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this.append(node.clone())
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} else {
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this.append(node)
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}
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}
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} else {
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this[name] = defaults[name]
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}
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}
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}
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addToError(error) {
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error.postcssNode = this
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if (error.stack && this.source && /\n\s{4}at /.test(error.stack)) {
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let s = this.source
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error.stack = error.stack.replace(
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/\n\s{4}at /,
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`$&${s.input.from}:${s.start.line}:${s.start.column}$&`
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)
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}
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return error
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}
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after(add) {
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this.parent.insertAfter(this, add)
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return this
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}
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assign(overrides = {}) {
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for (let name in overrides) {
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this[name] = overrides[name]
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}
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return this
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}
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before(add) {
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this.parent.insertBefore(this, add)
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return this
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}
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cleanRaws(keepBetween) {
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delete this.raws.before
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delete this.raws.after
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if (!keepBetween) delete this.raws.between
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}
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clone(overrides = {}) {
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let cloned = cloneNode(this)
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for (let name in overrides) {
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cloned[name] = overrides[name]
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}
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return cloned
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}
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cloneAfter(overrides = {}) {
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let cloned = this.clone(overrides)
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this.parent.insertAfter(this, cloned)
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return cloned
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}
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cloneBefore(overrides = {}) {
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let cloned = this.clone(overrides)
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this.parent.insertBefore(this, cloned)
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return cloned
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}
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error(message, opts = {}) {
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if (this.source) {
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let { end, start } = this.rangeBy(opts)
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return this.source.input.error(
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message,
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{ column: start.column, line: start.line },
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{ column: end.column, line: end.line },
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opts
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)
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}
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return new CssSyntaxError(message)
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}
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getProxyProcessor() {
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return {
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get(node, prop) {
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if (prop === 'proxyOf') {
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return node
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} else if (prop === 'root') {
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return () => node.root().toProxy()
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} else {
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return node[prop]
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}
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},
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set(node, prop, value) {
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if (node[prop] === value) return true
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node[prop] = value
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if (
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prop === 'prop' ||
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prop === 'value' ||
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prop === 'name' ||
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prop === 'params' ||
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prop === 'important' ||
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/* c8 ignore next */
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prop === 'text'
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) {
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node.markDirty()
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}
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return true
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}
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}
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}
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/* c8 ignore next 3 */
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markClean() {
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this[isClean] = true
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}
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markDirty() {
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if (this[isClean]) {
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this[isClean] = false
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let next = this
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while ((next = next.parent)) {
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next[isClean] = false
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}
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}
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}
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next() {
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if (!this.parent) return undefined
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let index = this.parent.index(this)
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return this.parent.nodes[index + 1]
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}
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positionBy(opts = {}) {
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let pos = this.source.start
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if (opts.index) {
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pos = this.positionInside(opts.index)
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} else if (opts.word) {
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let inputString =
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'document' in this.source.input
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? this.source.input.document
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: this.source.input.css
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let stringRepresentation = inputString.slice(
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sourceOffset(inputString, this.source.start),
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sourceOffset(inputString, this.source.end)
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)
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let index = stringRepresentation.indexOf(opts.word)
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if (index !== -1) pos = this.positionInside(index)
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}
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return pos
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}
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positionInside(index) {
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let column = this.source.start.column
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let line = this.source.start.line
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let inputString =
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'document' in this.source.input
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? this.source.input.document
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: this.source.input.css
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let offset = sourceOffset(inputString, this.source.start)
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let end = offset + index
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for (let i = offset; i < end; i++) {
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if (inputString[i] === '\n') {
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column = 1
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line += 1
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} else {
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column += 1
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}
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}
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return { column, line, offset: end }
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}
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prev() {
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if (!this.parent) return undefined
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let index = this.parent.index(this)
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return this.parent.nodes[index - 1]
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}
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rangeBy(opts = {}) {
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let inputString =
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'document' in this.source.input
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? this.source.input.document
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: this.source.input.css
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let start = {
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column: this.source.start.column,
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line: this.source.start.line,
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offset: sourceOffset(inputString, this.source.start)
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}
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let end = this.source.end
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? {
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column: this.source.end.column + 1,
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line: this.source.end.line,
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offset:
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typeof this.source.end.offset === 'number'
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? // `source.end.offset` is exclusive, so we don't need to add 1
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this.source.end.offset
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: // Since line/column in this.source.end is inclusive,
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// the `sourceOffset(... , this.source.end)` returns an inclusive offset.
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// So, we add 1 to convert it to exclusive.
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sourceOffset(inputString, this.source.end) + 1
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}
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: {
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column: start.column + 1,
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line: start.line,
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offset: start.offset + 1
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}
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if (opts.word) {
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let stringRepresentation = inputString.slice(
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sourceOffset(inputString, this.source.start),
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sourceOffset(inputString, this.source.end)
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)
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let index = stringRepresentation.indexOf(opts.word)
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if (index !== -1) {
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start = this.positionInside(index)
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end = this.positionInside(index + opts.word.length)
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}
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} else {
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if (opts.start) {
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start = {
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column: opts.start.column,
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line: opts.start.line,
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offset: sourceOffset(inputString, opts.start)
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}
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} else if (opts.index) {
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start = this.positionInside(opts.index)
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}
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if (opts.end) {
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end = {
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column: opts.end.column,
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line: opts.end.line,
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offset: sourceOffset(inputString, opts.end)
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}
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} else if (typeof opts.endIndex === 'number') {
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end = this.positionInside(opts.endIndex)
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} else if (opts.index) {
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end = this.positionInside(opts.index + 1)
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}
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}
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if (
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end.line < start.line ||
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(end.line === start.line && end.column <= start.column)
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) {
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end = {
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column: start.column + 1,
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line: start.line,
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offset: start.offset + 1
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}
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}
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return { end, start }
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}
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raw(prop, defaultType) {
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let str = new Stringifier()
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return str.raw(this, prop, defaultType)
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}
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remove() {
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if (this.parent) {
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this.parent.removeChild(this)
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}
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this.parent = undefined
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return this
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}
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replaceWith(...nodes) {
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if (this.parent) {
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let bookmark = this
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let foundSelf = false
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for (let node of nodes) {
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if (node === this) {
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foundSelf = true
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} else if (foundSelf) {
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this.parent.insertAfter(bookmark, node)
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bookmark = node
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} else {
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this.parent.insertBefore(bookmark, node)
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}
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}
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if (!foundSelf) {
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this.remove()
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}
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}
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return this
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}
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root() {
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let result = this
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while (result.parent && result.parent.type !== 'document') {
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result = result.parent
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}
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return result
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}
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toJSON(_, inputs) {
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let fixed = {}
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let emitInputs = inputs == null
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inputs = inputs || new Map()
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let inputsNextIndex = 0
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for (let name in this) {
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if (!Object.prototype.hasOwnProperty.call(this, name)) {
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/* c8 ignore next 2 */
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continue
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}
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if (name === 'parent' || name === 'proxyCache') continue
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let value = this[name]
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if (Array.isArray(value)) {
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fixed[name] = value.map(i => {
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if (typeof i === 'object' && i.toJSON) {
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return i.toJSON(null, inputs)
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} else {
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return i
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}
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})
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} else if (typeof value === 'object' && value.toJSON) {
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fixed[name] = value.toJSON(null, inputs)
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} else if (name === 'source') {
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if (value == null) continue
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let inputId = inputs.get(value.input)
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if (inputId == null) {
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inputId = inputsNextIndex
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inputs.set(value.input, inputsNextIndex)
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inputsNextIndex++
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}
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fixed[name] = {
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end: value.end,
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inputId,
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start: value.start
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}
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} else {
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fixed[name] = value
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}
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}
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if (emitInputs) {
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fixed.inputs = [...inputs.keys()].map(input => input.toJSON())
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}
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return fixed
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}
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toProxy() {
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if (!this.proxyCache) {
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this.proxyCache = new Proxy(this, this.getProxyProcessor())
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}
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return this.proxyCache
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}
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toString(stringifier = stringify) {
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if (stringifier.stringify) stringifier = stringifier.stringify
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let result = ''
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stringifier(this, i => {
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result += i
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})
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return result
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}
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warn(result, text, opts = {}) {
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let data = { node: this }
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for (let i in opts) data[i] = opts[i]
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return result.warn(text, data)
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}
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}
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module.exports = Node
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Node.default = Node
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