mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2026-06-18 15:52:21 +00:00
9340d2d1a3
Move the layout tree from GC allocation to refcounted ownership so removed layout and paint subtrees are destroyed synchronously instead of waiting for the next GC sweep. This dramatically reduces GC memory usage peaks after layout tree churn and makes it easier for memory use to fall back after large document updates. Update layout factories, tree traversal, SVG layout node creation, paintable back-pointers, and pseudo-element layout links to use RefPtr ownership. Make display: contents follow the same shape as Blink and WebKit: the element itself does not create a layout node, and its children are flattened into the nearest layout parent. Wrap direct non-whitespace text in an anonymous inline node when the boxless element contributes inherited style to that text. Use an internal inline wrapper for display: contents pseudo-elements so generated content can still participate in layout, painting, hit testing, and pseudo-element queries. Keep CSSOM reporting the computed display value from the pseudo style, not the internal wrapper. Remove the retained out-of-tree layout node list and its testing hook, since the flattened model does not need a side owner for boxless elements. Add coverage for inherited text style, dynamic insertion order, pseudo-element hit testing, and computed style queries.
114 lines
4 KiB
C++
114 lines
4 KiB
C++
/*
|
|
* Copyright (c) 2020, Andreas Kling <andreas@ladybird.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <LibCore/Forward.h>
|
|
#include <LibGfx/Forward.h>
|
|
#include <LibWeb/HTML/NavigableContainer.h>
|
|
#include <LibWeb/Layout/ImageProvider.h>
|
|
|
|
namespace Web::HTML {
|
|
|
|
class HTMLObjectElement final
|
|
: public NavigableContainer
|
|
, public Layout::ImageProvider {
|
|
WEB_PLATFORM_OBJECT(HTMLObjectElement, NavigableContainer)
|
|
GC_DECLARE_ALLOCATOR(HTMLObjectElement);
|
|
|
|
enum class Representation {
|
|
Unknown,
|
|
Image,
|
|
ContentNavigable,
|
|
Children,
|
|
};
|
|
|
|
public:
|
|
virtual ~HTMLObjectElement() override;
|
|
|
|
virtual void form_associated_element_attribute_changed(FlyString const& name, Optional<String> const& old_value, Optional<String> const& value, Optional<FlyString> const& namespace_) override;
|
|
virtual void form_associated_element_was_removed(DOM::Node*) override;
|
|
|
|
String data() const;
|
|
void set_data(String const& data);
|
|
|
|
String type() const { return get_attribute_value(HTML::AttributeNames::type); }
|
|
|
|
// ^FormAssociatedElement
|
|
virtual bool is_form_associated_element() const override { return true; }
|
|
|
|
// ^FormAssociatedElement
|
|
// https://html.spec.whatwg.org/multipage/forms.html#category-listed
|
|
virtual bool is_listed() const override { return true; }
|
|
|
|
// ^EventTarget
|
|
virtual bool is_focusable() const override
|
|
{
|
|
return meets_focusable_area_rendering_requirements();
|
|
}
|
|
|
|
virtual void visit_edges(Cell::Visitor&) override;
|
|
|
|
private:
|
|
HTMLObjectElement(DOM::Document&, DOM::QualifiedName);
|
|
|
|
virtual bool is_html_object_element() const override { return true; }
|
|
|
|
virtual void initialize(JS::Realm&) override;
|
|
|
|
virtual bool is_presentational_hint(FlyString const&) const override;
|
|
virtual void apply_presentational_hints(Vector<CSS::StyleProperty>&) const override;
|
|
|
|
virtual RefPtr<Layout::Node> create_layout_node(CSS::ComputedProperties const&) override;
|
|
virtual void adjust_computed_style(CSS::ComputedProperties&) override;
|
|
|
|
bool has_ancestor_media_element_or_object_element_not_showing_fallback_content() const;
|
|
|
|
void queue_element_task_to_run_object_representation_steps();
|
|
void run_object_representation_handler_steps(Fetch::Infrastructure::Response const&, MimeSniff::MimeType const&, ReadonlyBytes);
|
|
void run_object_representation_completed_steps(Representation);
|
|
void run_object_representation_fallback_steps();
|
|
|
|
void load_image();
|
|
void update_layout_and_child_objects(Representation);
|
|
|
|
void resource_did_load(Fetch::Infrastructure::Response const&, ReadonlyBytes);
|
|
void resource_did_fail();
|
|
|
|
// ^DOM::Element
|
|
virtual i32 default_tab_index_value() const override;
|
|
|
|
// ^Layout::ImageProvider
|
|
virtual bool is_image_available() const override;
|
|
virtual Optional<CSSPixels> intrinsic_width() const override;
|
|
virtual Optional<CSSPixels> intrinsic_height() const override;
|
|
virtual Optional<CSSPixelFraction> intrinsic_aspect_ratio() const override;
|
|
virtual Optional<Gfx::DecodedImageFrame> current_image_frame_sized(Gfx::IntSize) const override;
|
|
virtual void set_visible_in_viewport(bool) override;
|
|
virtual GC::Ptr<DOM::Element const> to_html_element() const override { return *this; }
|
|
virtual size_t current_frame_index() const override { return 0; }
|
|
virtual GC::Ptr<DecodedImageData> decoded_image_data() const override { return image_data(); }
|
|
|
|
GC::Ptr<DecodedImageData> image_data() const;
|
|
|
|
Representation m_representation { Representation::Unknown };
|
|
|
|
GC::Ptr<SharedResourceRequest> m_resource_request;
|
|
|
|
GC::Ptr<DOM::DocumentObserver> m_document_observer;
|
|
|
|
Vector<DOM::DocumentLoadEventDelayer> m_document_load_event_delayer_for_object_representation_task;
|
|
Vector<DOM::DocumentLoadEventDelayer> m_document_load_event_delayer_for_resource_load;
|
|
};
|
|
|
|
}
|
|
|
|
namespace Web::DOM {
|
|
|
|
template<>
|
|
inline bool Node::fast_is<HTML::HTMLObjectElement>() const { return is_html_object_element(); }
|
|
|
|
}
|