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LibWeb: Implement EventHandler::focus_previous_element()

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This implements EventHandler::focus_previous_element() so we can cycle
backwards through focusable elements on a web page with Shift+Tab.
This commit is contained in:
Kenneth Myhra 2022-02-08 21:23:43 +01:00 • committed by Linus Groh
parent 3f9fc0f690
commit bf7f6a9e98
2 changed files with 26 additions and 2 deletions
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10
Userland/Libraries/LibWeb/DOM/NonDocumentTypeChildNode.h
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@ -24,6 +24,15 @@ public:
return nullptr;
}
Element* previous_element_in_pre_order()
{
for (auto* node = static_cast<NodeType*>(this)->previous_in_pre_order(); node; node = node->previous_in_pre_order()) {
if (is<Element>(*node))
return verify_cast<Element>(node);
}
return nullptr;
}
Element* next_element_sibling()
{
for (auto* sibling = static_cast<NodeType*>(this)->next_sibling(); sibling; sibling = sibling->next_sibling()) {
@ -43,6 +52,7 @@ public:
}
const Element* previous_element_sibling() const { return const_cast<NonDocumentTypeChildNode*>(this)->previous_element_sibling(); }
const Element* previous_element_in_pre_order() const { return const_cast<NonDocumentTypeChildNode*>(this)->previous_element_in_pre_order(); }
const Element* next_element_sibling() const { return const_cast<NonDocumentTypeChildNode*>(this)->next_element_sibling(); }
const Element* next_element_in_pre_order() const { return const_cast<NonDocumentTypeChildNode*>(this)->next_element_in_pre_order(); }