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LibHTML: Implement naive hit testing
We don't have proper line boxes yet, so we can't easily hit test inline text.
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parent
3ed41abba4
commit
3de4b99dc3
Notes:
sideshowbarker
2024-07-19 11:54:11 +09:00
Author: https://github.com/awesomekling Commit: https://github.com/SerenityOS/serenity/commit/3de4b99dc34
4 changed files with 38 additions and 0 deletions
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@ -1,5 +1,6 @@
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#include <LibGUI/GPainter.h>
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#include <LibGUI/GScrollBar.h>
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#include <LibHTML/DOM/Element.h>
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#include <LibHTML/Dump.h>
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#include <LibHTML/HtmlView.h>
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#include <LibHTML/Layout/LayoutNode.h>
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@ -78,3 +79,17 @@ void HtmlView::paint_event(GPaintEvent& event)
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RenderingContext context { painter };
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m_layout_root->render(context);
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}
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void HtmlView::mousemove_event(GMouseEvent& event)
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{
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if (!m_layout_root)
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return GScrollableWidget::mousemove_event(event);
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auto result = m_layout_root->hit_test(event.position());
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if (result.layout_node) {
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if (auto* node = result.layout_node->node()) {
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dbg() << "HtmlView: mousemove: " << node->tag_name() << "{" << node << "}";
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}
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}
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event.accept();
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}
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@ -17,6 +17,7 @@ protected:
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virtual void resize_event(GResizeEvent&) override;
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virtual void paint_event(GPaintEvent&) override;
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virtual void mousemove_event(GMouseEvent&) override;
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private:
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void layout_and_sync_size();
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@ -1,3 +1,4 @@
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#include <LibHTML/DOM/Element.h>
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#include <LibHTML/Layout/LayoutBlock.h>
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#include <LibHTML/Layout/LayoutNode.h>
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@ -34,3 +35,16 @@ void LayoutNode::render(RenderingContext& context)
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child.render(context);
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});
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}
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HitTestResult LayoutNode::hit_test(const Point& position) const
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{
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if (!m_rect.contains(position))
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return {};
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HitTestResult result { this };
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for_each_child([&](auto& child) {
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auto child_result = child.hit_test(position);
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if (child_result.layout_node)
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result = child_result;
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});
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return result;
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}
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@ -9,7 +9,13 @@
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#include <LibHTML/TreeNode.h>
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class Node;
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class Element;
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class LayoutBlock;
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class LayoutNode;
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struct HitTestResult {
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RefPtr<LayoutNode> layout_node;
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};
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class LayoutNode : public TreeNode<LayoutNode> {
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public:
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@ -22,6 +28,8 @@ public:
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ComputedStyle& style() { return m_style; }
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const ComputedStyle& style() const { return m_style; }
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virtual HitTestResult hit_test(const Point&) const;
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bool is_anonymous() const { return !m_node; }
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const Node* node() const { return m_node; }
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