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