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<a href="../../../index.html">all files</a> / <a href="index.html">src/hyperscript/hasCssSelector/</a> hasCssSelector.ts
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">import { VNode } from '../../'
import { matchesSelector } from './matchesSelector'
// tslint:disable-next-line:cyclomatic-complexity
export function hasCssSelector(cssSelector: string, vNode: VNode): boolean {
cssSelector = cssSelector.trim()
if (cssSelector === '*')
return true
if (cssSelector.indexOf(',') > -1) {
const cssSelectors = cssSelector.split(',').map((str) => str.trim())
for (let i = 0; i < cssSelectors.length; ++i)
if (hasCssSelector(cssSelectors[i], vNode))
return true
return false
} else if (cssSelector.indexOf('>') > -1) {
const [ parentSelector, childSelector ] = splitByLastIndex(cssSelector, '>')
<span class="missing-if-branch" title="if path not taken" >I</span>if (!vNode.parent)
<span class="cstat-no" title="statement not covered" > return false</span>
return hasCssSelector(parentSelector, vNode.parent) &&
hasCssSelector(childSelector, vNode)
} else if (cssSelector.indexOf(' + ') > -1) {
const [ siblingSelector, selector ] = splitByLastIndex(cssSelector, '+')
const parent = vNode.parent
<span class="missing-if-branch" title="if path not taken" >I</span>if (!parent || !hasCssSelector(selector, vNode))
<span class="cstat-no" title="statement not covered" > return false</span>
const children = parent.children
<span class="missing-if-branch" title="if path not taken" >I</span>if (!children) <span class="cstat-no" title="statement not covered" >return false</span>
const index = children.indexOf(vNode)
if (index === 0 || !hasCssSelector(siblingSelector, children[index - 1]))
return false
return true
} else if (cssSelector.indexOf(' ~ ') > -1) {
const [ siblingSelector, selector ] = splitByLastIndex(cssSelector, '~')
const parent = vNode.parent
<span class="missing-if-branch" title="if path not taken" >I</span>if (!parent || !hasCssSelector(selector, vNode))
<span class="cstat-no" title="statement not covered" > return false</span>
const children = parent.children
<span class="missing-if-branch" title="if path not taken" >I</span>if (!children) <span class="cstat-no" title="statement not covered" >return false</span>
const index = children.indexOf(vNode)
<span class="missing-if-branch" title="if path not taken" >I</span>if (index === 0)
<span class="cstat-no" title="statement not covered" > return false</span>
for (let i = 0; i < index; ++i)
if (hasCssSelector(siblingSelector, children[i]))
return true
return false
} else if (cssSelector.indexOf(' ') > -1) {
const cssSelectors: Array<string> =
cssSelector.split(' ').filter(Boolean).map((str) => str.trim())
let i = cssSelectors.length - 1
if (!hasCssSelector(cssSelectors[i], vNode))
return false
while (--i >= 0) {
const parentMatches =
traverseParentVNodes((parent) => hasCssSelector(cssSelectors[i], parent), vNode)
if (!parentMatches)
return false
}
return true
}
return matchesSelector(cssSelector, vNode)
}
function splitByLastIndex(cssSelector: string, token: string): [string, string] {
const index = cssSelector.lastIndexOf(token)
return [
cssSelector.substring(0, index).trim(),
cssSelector.substring(index + 1).trim(),
]
}
function traverseParentVNodes(
predicate: (vNode: VNode) => boolean,
vNode: VNode): boolean
{
const parent = vNode.parent
if (!parent) return false
if (predicate(parent))
return true
return traverseParentVNodes(predicate, parent)
}
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