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53 lines
1.3 KiB
JavaScript

let Declaration = require('../declaration')
let { isPureNumber } = require('../utils')
class GridEnd extends Declaration {
/**
* Change repeating syntax for IE
*/
insert(decl, prefix, prefixes, result) {
if (prefix !== '-ms-') return super.insert(decl, prefix, prefixes)
let clonedDecl = this.clone(decl)
let startProp = decl.prop.replace(/end$/, 'start')
let spanProp = prefix + decl.prop.replace(/end$/, 'span')
if (decl.parent.some(i => i.prop === spanProp)) {
return undefined
}
clonedDecl.prop = spanProp
if (decl.value.includes('span')) {
clonedDecl.value = decl.value.replace(/span\s/i, '')
} else {
let startDecl
decl.parent.walkDecls(startProp, d => {
startDecl = d
})
if (startDecl) {
if (isPureNumber(startDecl.value)) {
let value = Number(decl.value) - Number(startDecl.value) + ''
clonedDecl.value = value
} else {
return undefined
}
} else {
decl.warn(
result,
`Can not prefix ${decl.prop} (${startProp} is not found)`
)
}
}
decl.cloneBefore(clonedDecl)
return undefined
}
}
GridEnd.names = ['grid-row-end', 'grid-column-end']
module.exports = GridEnd