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container.js
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Wed, Feb 5, 11:48

container.js
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'use strict'
let { isClean, my } = require('./symbols')
let Declaration = require('./declaration')
let Comment = require('./comment')
let Node = require('./node')
let parse, Rule, AtRule, Root
function cleanSource(nodes) {
return nodes.map(i => {
if (i.nodes) i.nodes = cleanSource(i.nodes)
delete i.source
return i
})
}
function markDirtyUp(node) {
node[isClean] = false
if (node.proxyOf.nodes) {
for (let i of node.proxyOf.nodes) {
markDirtyUp(i)
}
}
}
class Container extends Node {
push(child) {
child.parent = this
this.proxyOf.nodes.push(child)
return this
}
each(callback) {
if (!this.proxyOf.nodes) return undefined
let iterator = this.getIterator()
let index, result
while (this.indexes[iterator] < this.proxyOf.nodes.length) {
index = this.indexes[iterator]
result = callback(this.proxyOf.nodes[index], index)
if (result === false) break
this.indexes[iterator] += 1
}
delete this.indexes[iterator]
return result
}
walk(callback) {
return this.each((child, i) => {
let result
try {
result = callback(child, i)
} catch (e) {
throw child.addToError(e)
}
if (result !== false && child.walk) {
result = child.walk(callback)
}
return result
})
}
walkDecls(prop, callback) {
if (!callback) {
callback = prop
return this.walk((child, i) => {
if (child.type === 'decl') {
return callback(child, i)
}
})
}
if (prop instanceof RegExp) {
return this.walk((child, i) => {
if (child.type === 'decl' && prop.test(child.prop)) {
return callback(child, i)
}
})
}
return this.walk((child, i) => {
if (child.type === 'decl' && child.prop === prop) {
return callback(child, i)
}
})
}
walkRules(selector, callback) {
if (!callback) {
callback = selector
return this.walk((child, i) => {
if (child.type === 'rule') {
return callback(child, i)
}
})
}
if (selector instanceof RegExp) {
return this.walk((child, i) => {
if (child.type === 'rule' && selector.test(child.selector)) {
return callback(child, i)
}
})
}
return this.walk((child, i) => {
if (child.type === 'rule' && child.selector === selector) {
return callback(child, i)
}
})
}
walkAtRules(name, callback) {
if (!callback) {
callback = name
return this.walk((child, i) => {
if (child.type === 'atrule') {
return callback(child, i)
}
})
}
if (name instanceof RegExp) {
return this.walk((child, i) => {
if (child.type === 'atrule' && name.test(child.name)) {
return callback(child, i)
}
})
}
return this.walk((child, i) => {
if (child.type === 'atrule' && child.name === name) {
return callback(child, i)
}
})
}
walkComments(callback) {
return this.walk((child, i) => {
if (child.type === 'comment') {
return callback(child, i)
}
})
}
append(...children) {
for (let child of children) {
let nodes = this.normalize(child, this.last)
for (let node of nodes) this.proxyOf.nodes.push(node)
}
this.markDirty()
return this
}
prepend(...children) {
children = children.reverse()
for (let child of children) {
let nodes = this.normalize(child, this.first, 'prepend').reverse()
for (let node of nodes) this.proxyOf.nodes.unshift(node)
for (let id in this.indexes) {
this.indexes[id] = this.indexes[id] + nodes.length
}
}
this.markDirty()
return this
}
cleanRaws(keepBetween) {
super.cleanRaws(keepBetween)
if (this.nodes) {
for (let node of this.nodes) node.cleanRaws(keepBetween)
}
}
insertBefore(exist, add) {
let existIndex = this.index(exist)
let type = existIndex === 0 ? 'prepend' : false
let nodes = this.normalize(add, this.proxyOf.nodes[existIndex], type).reverse()
existIndex = this.index(exist)
for (let node of nodes) this.proxyOf.nodes.splice(existIndex, 0, node)
let index
for (let id in this.indexes) {
index = this.indexes[id]
if (existIndex <= index) {
this.indexes[id] = index + nodes.length
}
}
this.markDirty()
return this
}
insertAfter(exist, add) {
let existIndex = this.index(exist)
let nodes = this.normalize(add, this.proxyOf.nodes[existIndex]).reverse()
existIndex = this.index(exist)
for (let node of nodes) this.proxyOf.nodes.splice(existIndex + 1, 0, node)
let index
for (let id in this.indexes) {
index = this.indexes[id]
if (existIndex < index) {
this.indexes[id] = index + nodes.length
}
}
this.markDirty()
return this
}
removeChild(child) {
child = this.index(child)
this.proxyOf.nodes[child].parent = undefined
this.proxyOf.nodes.splice(child, 1)
let index
for (let id in this.indexes) {
index = this.indexes[id]
if (index >= child) {
this.indexes[id] = index - 1
}
}
this.markDirty()
return this
}
removeAll() {
for (let node of this.proxyOf.nodes) node.parent = undefined
this.proxyOf.nodes = []
this.markDirty()
return this
}
replaceValues(pattern, opts, callback) {
if (!callback) {
callback = opts
opts = {}
}
this.walkDecls(decl => {
if (opts.props && !opts.props.includes(decl.prop)) return
if (opts.fast && !decl.value.includes(opts.fast)) return
decl.value = decl.value.replace(pattern, callback)
})
this.markDirty()
return this
}
every(condition) {
return this.nodes.every(condition)
}
some(condition) {
return this.nodes.some(condition)
}
index(child) {
if (typeof child === 'number') return child
if (child.proxyOf) child = child.proxyOf
return this.proxyOf.nodes.indexOf(child)
}
get first() {
if (!this.proxyOf.nodes) return undefined
return this.proxyOf.nodes[0]
}
get last() {
if (!this.proxyOf.nodes) return undefined
return this.proxyOf.nodes[this.proxyOf.nodes.length - 1]
}
normalize(nodes, sample) {
if (typeof nodes === 'string') {
nodes = cleanSource(parse(nodes).nodes)
} else if (Array.isArray(nodes)) {
nodes = nodes.slice(0)
for (let i of nodes) {
if (i.parent) i.parent.removeChild(i, 'ignore')
}
} else if (nodes.type === 'root' && this.type !== 'document') {
nodes = nodes.nodes.slice(0)
for (let i of nodes) {
if (i.parent) i.parent.removeChild(i, 'ignore')
}
} else if (nodes.type) {
nodes = [nodes]
} else if (nodes.prop) {
if (typeof nodes.value === 'undefined') {
throw new Error('Value field is missed in node creation')
} else if (typeof nodes.value !== 'string') {
nodes.value = String(nodes.value)
}
nodes = [new Declaration(nodes)]
} else if (nodes.selector) {
nodes = [new Rule(nodes)]
} else if (nodes.name) {
nodes = [new AtRule(nodes)]
} else if (nodes.text) {
nodes = [new Comment(nodes)]
} else {
throw new Error('Unknown node type in node creation')
}
let processed = nodes.map(i => {
/* c8 ignore next */
if (!i[my]) Container.rebuild(i)
i = i.proxyOf
if (i.parent) i.parent.removeChild(i)
if (i[isClean]) markDirtyUp(i)
if (typeof i.raws.before === 'undefined') {
if (sample && typeof sample.raws.before !== 'undefined') {
i.raws.before = sample.raws.before.replace(/\S/g, '')
}
}
i.parent = this.proxyOf
return i
})
return processed
}
getProxyProcessor() {
return {
set(node, prop, value) {
if (node[prop] === value) return true
node[prop] = value
if (prop === 'name' || prop === 'params' || prop === 'selector') {
node.markDirty()
}
return true
},
get(node, prop) {
if (prop === 'proxyOf') {
return node
} else if (!node[prop]) {
return node[prop]
} else if (
prop === 'each' ||
(typeof prop === 'string' && prop.startsWith('walk'))
) {
return (...args) => {
return node[prop](
...args.map(i => {
if (typeof i === 'function') {
return (child, index) => i(child.toProxy(), index)
} else {
return i
}
})
)
}
} else if (prop === 'every' || prop === 'some') {
return cb => {
return node[prop]((child, ...other) =>
cb(child.toProxy(), ...other)
)
}
} else if (prop === 'root') {
return () => node.root().toProxy()
} else if (prop === 'nodes') {
return node.nodes.map(i => i.toProxy())
} else if (prop === 'first' || prop === 'last') {
return node[prop].toProxy()
} else {
return node[prop]
}
}
}
}
getIterator() {
if (!this.lastEach) this.lastEach = 0
if (!this.indexes) this.indexes = {}
this.lastEach += 1
let iterator = this.lastEach
this.indexes[iterator] = 0
return iterator
}
}
Container.registerParse = dependant => {
parse = dependant
}
Container.registerRule = dependant => {
Rule = dependant
}
Container.registerAtRule = dependant => {
AtRule = dependant
}
Container.registerRoot = dependant => {
Root = dependant
}
module.exports = Container
Container.default = Container
/* c8 ignore start */
Container.rebuild = node => {
if (node.type === 'atrule') {
Object.setPrototypeOf(node, AtRule.prototype)
} else if (node.type === 'rule') {
Object.setPrototypeOf(node, Rule.prototype)
} else if (node.type === 'decl') {
Object.setPrototypeOf(node, Declaration.prototype)
} else if (node.type === 'comment') {
Object.setPrototypeOf(node, Comment.prototype)
} else if (node.type === 'root') {
Object.setPrototypeOf(node, Root.prototype)
}
node[my] = true
if (node.nodes) {
node.nodes.forEach(child => {
Container.rebuild(child)
})
}
}
/* c8 ignore stop */

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