50 lines
1.2 KiB
JavaScript
50 lines
1.2 KiB
JavaScript
'use strict'
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const directiveParser = require('./directive-parser.js')
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module.exports = {
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stack: [],
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pop (current) {
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const index = this.stack.indexOf(current)
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if (index !== -1) {
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this.stack.splice(index, 1)
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}
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if (!current.preserve) {
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current.source.remove()
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}
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},
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parse (node, lazyResult, callback) {
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let current
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const metadata = directiveParser(node)
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if (metadata) {
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if (!metadata.begin && metadata.end) {
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this.walk((item) => {
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if (metadata.name === item.metadata.name) {
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this.pop(item)
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current = { metadata, directive: item.directive, source: node, preserve: item.preserve }
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return false
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}
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})
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} else {
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current = { metadata, directive: null, source: node, preserve: null }
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}
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if (current === undefined) {
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lazyResult.warn(`found end "${metadata.name}" without a matching begin.`, { node: node })
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} else if (callback(current)) {
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this.stack.push(current)
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} else if (!current.preserve) {
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current.source.remove()
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}
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}
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},
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walk (callback) {
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let len = this.stack.length
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while (--len > -1) {
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if (!callback(this.stack[len])) {
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break
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}
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}
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}
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}
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