mirror of
https://github.com/RGBCube/serenity
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115 lines
3.6 KiB
C++
115 lines
3.6 KiB
C++
/*
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* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/NonnullOwnPtr.h>
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#include <LibWeb/Layout/Box.h>
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#include <LibWeb/Layout/LineBox.h>
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#include <LibWeb/Layout/TextNode.h>
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namespace Web::Painting {
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enum class PaintPhase {
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Background,
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Border,
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Foreground,
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FocusOutline,
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Overlay,
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};
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struct HitTestResult {
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NonnullRefPtr<Painting::Paintable> paintable;
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int index_in_node { 0 };
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enum InternalPosition {
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None,
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Before,
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Inside,
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After,
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};
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InternalPosition internal_position { None };
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DOM::Node* dom_node();
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DOM::Node const* dom_node() const;
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};
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enum class HitTestType {
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Exact, // Exact matches only
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TextCursor, // Clicking past the right/bottom edge of text will still hit the text
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};
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class Paintable : public RefCounted<Paintable> {
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AK_MAKE_NONMOVABLE(Paintable);
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AK_MAKE_NONCOPYABLE(Paintable);
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public:
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virtual ~Paintable() = default;
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virtual void paint(PaintContext&, PaintPhase) const { }
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virtual void before_children_paint(PaintContext&, PaintPhase) const { }
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virtual void after_children_paint(PaintContext&, PaintPhase) const { }
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virtual Optional<HitTestResult> hit_test(Gfx::FloatPoint const&, HitTestType) const;
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virtual bool wants_mouse_events() const { return false; }
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enum class DispatchEventOfSameName {
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Yes,
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No,
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};
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// When these methods return true, the DOM event with the same name will be
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// dispatch at the mouse_event_target if it returns a valid DOM::Node, or
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// the layout node's associated DOM node if it doesn't.
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virtual DispatchEventOfSameName handle_mousedown(Badge<EventHandler>, const Gfx::IntPoint&, unsigned button, unsigned modifiers);
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virtual DispatchEventOfSameName handle_mouseup(Badge<EventHandler>, const Gfx::IntPoint&, unsigned button, unsigned modifiers);
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virtual DispatchEventOfSameName handle_mousemove(Badge<EventHandler>, const Gfx::IntPoint&, unsigned buttons, unsigned modifiers);
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virtual DOM::Node* mouse_event_target() const { return nullptr; }
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virtual bool handle_mousewheel(Badge<EventHandler>, const Gfx::IntPoint&, unsigned buttons, unsigned modifiers, int wheel_delta_x, int wheel_delta_y);
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Layout::Node const& layout_node() const { return m_layout_node; }
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Layout::Node& layout_node() { return const_cast<Layout::Node&>(m_layout_node); }
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DOM::Node* dom_node() { return layout_node().dom_node(); }
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DOM::Node const* dom_node() const { return layout_node().dom_node(); }
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auto const& computed_values() const { return m_layout_node.computed_values(); }
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HTML::BrowsingContext const& browsing_context() const { return m_layout_node.browsing_context(); }
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HTML::BrowsingContext& browsing_context() { return layout_node().browsing_context(); }
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void set_needs_display() const { const_cast<Layout::Node&>(m_layout_node).set_needs_display(); }
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Layout::BlockContainer const* containing_block() const
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{
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if (!m_containing_block.has_value())
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m_containing_block = const_cast<Layout::Node&>(m_layout_node).containing_block();
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return *m_containing_block;
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}
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protected:
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explicit Paintable(Layout::Node const& layout_node)
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: m_layout_node(layout_node)
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{
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}
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private:
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Layout::Node const& m_layout_node;
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Optional<Layout::BlockContainer*> mutable m_containing_block;
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};
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inline DOM::Node* HitTestResult::dom_node()
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{
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return paintable->dom_node();
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}
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inline DOM::Node const* HitTestResult::dom_node() const
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{
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return paintable->dom_node();
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}
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}
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