89 lines
2.1 KiB
JavaScript
89 lines
2.1 KiB
JavaScript
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let Declaration = require('../declaration')
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class MaskComposite extends Declaration {
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/**
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* Prefix mask-composite for webkit
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*/
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insert(decl, prefix, prefixes) {
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let isCompositeProp = decl.prop === 'mask-composite'
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let compositeValues
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if (isCompositeProp) {
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compositeValues = decl.value.split(',')
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} else {
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compositeValues = decl.value.match(MaskComposite.regexp) || []
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}
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compositeValues = compositeValues.map(el => el.trim()).filter(el => el)
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let hasCompositeValues = compositeValues.length
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let compositeDecl
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if (hasCompositeValues) {
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compositeDecl = this.clone(decl)
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compositeDecl.value = compositeValues
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.map(value => MaskComposite.oldValues[value] || value)
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.join(', ')
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if (compositeValues.includes('intersect')) {
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compositeDecl.value += ', xor'
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}
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compositeDecl.prop = prefix + 'mask-composite'
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}
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if (isCompositeProp) {
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if (!hasCompositeValues) {
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return undefined
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}
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if (this.needCascade(decl)) {
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compositeDecl.raws.before = this.calcBefore(prefixes, decl, prefix)
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}
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return decl.parent.insertBefore(decl, compositeDecl)
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}
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let cloned = this.clone(decl)
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cloned.prop = prefix + cloned.prop
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if (hasCompositeValues) {
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cloned.value = cloned.value.replace(MaskComposite.regexp, '')
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}
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if (this.needCascade(decl)) {
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cloned.raws.before = this.calcBefore(prefixes, decl, prefix)
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}
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decl.parent.insertBefore(decl, cloned)
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if (!hasCompositeValues) {
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return decl
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}
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if (this.needCascade(decl)) {
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compositeDecl.raws.before = this.calcBefore(prefixes, decl, prefix)
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}
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return decl.parent.insertBefore(decl, compositeDecl)
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}
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}
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MaskComposite.names = ['mask', 'mask-composite']
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MaskComposite.oldValues = {
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add: 'source-over',
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exclude: 'xor',
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intersect: 'source-in',
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subtract: 'source-out'
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}
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MaskComposite.regexp = new RegExp(
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`\\s+(${Object.keys(MaskComposite.oldValues).join(
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'|'
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)})\\b(?!\\))\\s*(?=[,])`,
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'ig'
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)
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module.exports = MaskComposite
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