55 lines
1.1 KiB
JavaScript
55 lines
1.1 KiB
JavaScript
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let list = require('postcss').list
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let flexSpec = require('./flex-spec')
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let Declaration = require('../declaration')
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class Flex extends Declaration {
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/**
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* Return property name by final spec
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*/
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normalize() {
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return 'flex'
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}
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/**
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* Change property name for 2009 spec
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*/
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prefixed(prop, prefix) {
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let spec
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;[spec, prefix] = flexSpec(prefix)
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if (spec === 2009) {
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return prefix + 'box-flex'
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}
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return super.prefixed(prop, prefix)
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}
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/**
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* Spec 2009 supports only first argument
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* Spec 2012 disallows unitless basis
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*/
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set(decl, prefix) {
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let spec = flexSpec(prefix)[0]
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if (spec === 2009) {
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decl.value = list.space(decl.value)[0]
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decl.value = Flex.oldValues[decl.value] || decl.value
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return super.set(decl, prefix)
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}
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if (spec === 2012) {
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let components = list.space(decl.value)
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if (components.length === 3 && components[2] === '0') {
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decl.value = components.slice(0, 2).concat('0px').join(' ')
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}
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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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Flex.names = ['flex', 'box-flex']
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Flex.oldValues = {
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auto: '1',
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none: '0'
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}
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module.exports = Flex
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