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LibHTML: Implement immediate-child selectors (#foo > #bar)

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This commit is contained in:
Andreas Kling 2019-10-06 15:41:16 +02:00
parent 156b35742a
commit cad326f323
Notes: sideshowbarker 2024-07-19 11:46:43 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/cad326f3230
2 changed files with 25 additions and 2 deletions
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17
Base/home/anon/www/selectors.html
View File

@ -11,6 +11,10 @@
border-width: 1;
border-color: #00ff00;
}
div > .boo > .bee {
background-color: #000000;
color: #ff00ff;
}
</style>
</head>
<body>
@ -28,5 +32,18 @@
<div>hello</div>
</div>
</div>
<div>
<div class="boo">
<div class="bee">Spooky!</div>
</div>
</div>
<div>
<div class="boo">
<div>
<div class="bee">
Not spooky!
</div>
</div>
</div>
</body>
</html>

10
Libraries/LibHTML/CSS/StyleResolver.cpp
View File

@ -34,9 +34,10 @@ static bool matches(const Selector& selector, int component_index, const Element
auto& component = selector.components()[component_index];
if (!matches(component, element))
return false;
if (component.relation == Selector::Component::Relation::None)
switch (component.relation) {
case Selector::Component::Relation::None:
return true;
if (component.relation == Selector::Component::Relation::Descendant) {
case Selector::Component::Relation::Descendant:
ASSERT(component_index != 0);
for (auto* ancestor = element.parent(); ancestor; ancestor = ancestor->parent()) {
if (!ancestor->is_element())
@ -45,6 +46,11 @@ static bool matches(const Selector& selector, int component_index, const Element
return true;
}
return false;
case Selector::Component::Relation::ImmediateChild:
ASSERT(component_index != 0);
if (!element.parent() || !element.parent()->is_element())
return false;
return matches(selector, component_index - 1, static_cast<const Element&>(*element.parent()));
}
ASSERT_NOT_REACHED();
}