64 lines
1.3 KiB
JavaScript
64 lines
1.3 KiB
JavaScript
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let Declaration = require('../declaration')
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class BreakProps extends Declaration {
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/**
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* Change name for -webkit- and -moz- prefix
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*/
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prefixed(prop, prefix) {
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return `${prefix}column-${prop}`
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}
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/**
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* Return property name by final spec
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*/
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normalize(prop) {
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if (prop.includes('inside')) {
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return 'break-inside'
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}
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if (prop.includes('before')) {
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return 'break-before'
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}
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return 'break-after'
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}
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/**
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* Change prefixed value for avoid-column and avoid-page
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*/
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set(decl, prefix) {
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if (
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(decl.prop === 'break-inside' && decl.value === 'avoid-column') ||
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decl.value === 'avoid-page'
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) {
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decl.value = 'avoid'
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}
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return super.set(decl, prefix)
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}
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/**
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* Don’t prefix some values
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*/
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insert(decl, prefix, prefixes) {
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if (decl.prop !== 'break-inside') {
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return super.insert(decl, prefix, prefixes)
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}
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if (/region/i.test(decl.value) || /page/i.test(decl.value)) {
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return undefined
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}
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return super.insert(decl, prefix, prefixes)
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}
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}
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BreakProps.names = [
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'break-inside',
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'page-break-inside',
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'column-break-inside',
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'break-before',
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'page-break-before',
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'column-break-before',
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'break-after',
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'page-break-after',
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'column-break-after'
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]
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module.exports = BreakProps
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