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54 lines
1.1 KiB
54 lines
1.1 KiB
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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* 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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* 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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* 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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