354 lines
8.0 KiB
JavaScript
354 lines
8.0 KiB
JavaScript
'use strict'
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const DEFAULT_RAW = {
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after: '\n',
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beforeClose: '\n',
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beforeComment: '\n',
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beforeDecl: '\n',
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beforeOpen: ' ',
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beforeRule: '\n',
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colon: ': ',
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commentLeft: ' ',
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commentRight: ' ',
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emptyBody: '',
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indent: ' ',
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semicolon: false
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}
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function capitalize(str) {
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return str[0].toUpperCase() + str.slice(1)
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}
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class Stringifier {
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constructor(builder) {
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this.builder = builder
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}
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atrule(node, semicolon) {
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let name = '@' + node.name
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let params = node.params ? this.rawValue(node, 'params') : ''
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if (typeof node.raws.afterName !== 'undefined') {
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name += node.raws.afterName
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} else if (params) {
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name += ' '
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}
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if (node.nodes) {
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this.block(node, name + params)
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} else {
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let end = (node.raws.between || '') + (semicolon ? ';' : '')
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this.builder(name + params + end, node)
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}
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}
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beforeAfter(node, detect) {
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let value
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if (node.type === 'decl') {
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value = this.raw(node, null, 'beforeDecl')
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} else if (node.type === 'comment') {
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value = this.raw(node, null, 'beforeComment')
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} else if (detect === 'before') {
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value = this.raw(node, null, 'beforeRule')
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} else {
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value = this.raw(node, null, 'beforeClose')
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}
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let buf = node.parent
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let depth = 0
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while (buf && buf.type !== 'root') {
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depth += 1
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buf = buf.parent
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}
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if (value.includes('\n')) {
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let indent = this.raw(node, null, 'indent')
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if (indent.length) {
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for (let step = 0; step < depth; step++) value += indent
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}
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}
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return value
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}
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block(node, start) {
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let between = this.raw(node, 'between', 'beforeOpen')
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this.builder(start + between + '{', node, 'start')
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let after
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if (node.nodes && node.nodes.length) {
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this.body(node)
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after = this.raw(node, 'after')
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} else {
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after = this.raw(node, 'after', 'emptyBody')
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}
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if (after) this.builder(after)
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this.builder('}', node, 'end')
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}
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body(node) {
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let last = node.nodes.length - 1
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while (last > 0) {
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if (node.nodes[last].type !== 'comment') break
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last -= 1
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}
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let semicolon = this.raw(node, 'semicolon')
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for (let i = 0; i < node.nodes.length; i++) {
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let child = node.nodes[i]
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let before = this.raw(child, 'before')
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if (before) this.builder(before)
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this.stringify(child, last !== i || semicolon)
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}
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}
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comment(node) {
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let left = this.raw(node, 'left', 'commentLeft')
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let right = this.raw(node, 'right', 'commentRight')
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this.builder('/*' + left + node.text + right + '*/', node)
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}
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decl(node, semicolon) {
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let between = this.raw(node, 'between', 'colon')
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let string = node.prop + between + this.rawValue(node, 'value')
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if (node.important) {
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string += node.raws.important || ' !important'
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}
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if (semicolon) string += ';'
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this.builder(string, node)
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}
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document(node) {
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this.body(node)
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}
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raw(node, own, detect) {
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let value
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if (!detect) detect = own
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// Already had
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if (own) {
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value = node.raws[own]
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if (typeof value !== 'undefined') return value
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}
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let parent = node.parent
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if (detect === 'before') {
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// Hack for first rule in CSS
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if (!parent || (parent.type === 'root' && parent.first === node)) {
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return ''
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}
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// `root` nodes in `document` should use only their own raws
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if (parent && parent.type === 'document') {
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return ''
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}
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}
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// Floating child without parent
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if (!parent) return DEFAULT_RAW[detect]
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// Detect style by other nodes
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let root = node.root()
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if (!root.rawCache) root.rawCache = {}
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if (typeof root.rawCache[detect] !== 'undefined') {
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return root.rawCache[detect]
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}
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if (detect === 'before' || detect === 'after') {
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return this.beforeAfter(node, detect)
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} else {
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let method = 'raw' + capitalize(detect)
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if (this[method]) {
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value = this[method](root, node)
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} else {
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root.walk(i => {
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value = i.raws[own]
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if (typeof value !== 'undefined') return false
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})
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}
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}
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if (typeof value === 'undefined') value = DEFAULT_RAW[detect]
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root.rawCache[detect] = value
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return value
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}
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rawBeforeClose(root) {
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let value
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root.walk(i => {
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if (i.nodes && i.nodes.length > 0) {
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if (typeof i.raws.after !== 'undefined') {
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value = i.raws.after
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if (value.includes('\n')) {
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value = value.replace(/[^\n]+$/, '')
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}
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return false
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}
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}
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})
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if (value) value = value.replace(/\S/g, '')
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return value
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}
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rawBeforeComment(root, node) {
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let value
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root.walkComments(i => {
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if (typeof i.raws.before !== 'undefined') {
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value = i.raws.before
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if (value.includes('\n')) {
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value = value.replace(/[^\n]+$/, '')
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}
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return false
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}
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})
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if (typeof value === 'undefined') {
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value = this.raw(node, null, 'beforeDecl')
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} else if (value) {
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value = value.replace(/\S/g, '')
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}
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return value
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}
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rawBeforeDecl(root, node) {
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let value
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root.walkDecls(i => {
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if (typeof i.raws.before !== 'undefined') {
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value = i.raws.before
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if (value.includes('\n')) {
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value = value.replace(/[^\n]+$/, '')
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}
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return false
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}
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})
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if (typeof value === 'undefined') {
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value = this.raw(node, null, 'beforeRule')
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} else if (value) {
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value = value.replace(/\S/g, '')
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}
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return value
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}
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rawBeforeOpen(root) {
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let value
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root.walk(i => {
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if (i.type !== 'decl') {
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value = i.raws.between
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if (typeof value !== 'undefined') return false
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}
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})
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return value
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}
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rawBeforeRule(root) {
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let value
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root.walk(i => {
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if (i.nodes && (i.parent !== root || root.first !== i)) {
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if (typeof i.raws.before !== 'undefined') {
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value = i.raws.before
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if (value.includes('\n')) {
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value = value.replace(/[^\n]+$/, '')
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}
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return false
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}
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}
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})
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if (value) value = value.replace(/\S/g, '')
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return value
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}
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rawColon(root) {
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let value
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root.walkDecls(i => {
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if (typeof i.raws.between !== 'undefined') {
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value = i.raws.between.replace(/[^\s:]/g, '')
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return false
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}
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})
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return value
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}
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rawEmptyBody(root) {
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let value
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root.walk(i => {
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if (i.nodes && i.nodes.length === 0) {
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value = i.raws.after
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if (typeof value !== 'undefined') return false
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}
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})
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return value
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}
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rawIndent(root) {
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if (root.raws.indent) return root.raws.indent
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let value
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root.walk(i => {
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let p = i.parent
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if (p && p !== root && p.parent && p.parent === root) {
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if (typeof i.raws.before !== 'undefined') {
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let parts = i.raws.before.split('\n')
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value = parts[parts.length - 1]
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value = value.replace(/\S/g, '')
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return false
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}
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}
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})
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return value
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}
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rawSemicolon(root) {
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let value
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root.walk(i => {
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if (i.nodes && i.nodes.length && i.last.type === 'decl') {
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value = i.raws.semicolon
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if (typeof value !== 'undefined') return false
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}
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})
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return value
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}
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rawValue(node, prop) {
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let value = node[prop]
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let raw = node.raws[prop]
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if (raw && raw.value === value) {
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return raw.raw
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}
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return value
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}
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root(node) {
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this.body(node)
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if (node.raws.after) this.builder(node.raws.after)
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}
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rule(node) {
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this.block(node, this.rawValue(node, 'selector'))
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if (node.raws.ownSemicolon) {
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this.builder(node.raws.ownSemicolon, node, 'end')
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}
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}
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stringify(node, semicolon) {
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/* c8 ignore start */
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if (!this[node.type]) {
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throw new Error(
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'Unknown AST node type ' +
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node.type +
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'. ' +
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'Maybe you need to change PostCSS stringifier.'
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)
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}
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/* c8 ignore stop */
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this[node.type](node, semicolon)
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}
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}
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module.exports = Stringifier
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Stringifier.default = Stringifier
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