45a47cb32b
They currently assume the DOM node is an HTMLImageElement with respect to handling the alt attribute. The HTMLInputElement will require the same behavior.
147 lines
5.3 KiB
C++
147 lines
5.3 KiB
C++
/*
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* Copyright (c) 2018-2023, 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/ByteBuffer.h>
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#include <AK/OwnPtr.h>
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#include <LibGfx/Forward.h>
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#include <LibGfx/ImmutableBitmap.h>
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#include <LibJS/Heap/HeapFunction.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/DocumentLoadEventDelayer.h>
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#include <LibWeb/HTML/BrowsingContext.h>
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#include <LibWeb/HTML/CORSSettingAttribute.h>
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#include <LibWeb/HTML/FormAssociatedElement.h>
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#include <LibWeb/HTML/HTMLElement.h>
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#include <LibWeb/HTML/LazyLoadingElement.h>
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#include <LibWeb/HTML/SourceSet.h>
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#include <LibWeb/Layout/ImageProvider.h>
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namespace Web::HTML {
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class HTMLImageElement final
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: public HTMLElement
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, public FormAssociatedElement
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, public LazyLoadingElement<HTMLImageElement>
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, public Layout::ImageProvider
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, public DOM::Document::ViewportClient {
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WEB_PLATFORM_OBJECT(HTMLImageElement, HTMLElement);
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JS_DECLARE_ALLOCATOR(HTMLImageElement);
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FORM_ASSOCIATED_ELEMENT(HTMLElement, HTMLImageElement);
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LAZY_LOADING_ELEMENT(HTMLImageElement);
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public:
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virtual ~HTMLImageElement() override;
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virtual void form_associated_element_attribute_changed(FlyString const& name, Optional<String> const& value) override;
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String alt() const { return get_attribute_value(HTML::AttributeNames::alt); }
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String src() const { return get_attribute_value(HTML::AttributeNames::src); }
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RefPtr<Gfx::ImmutableBitmap> immutable_bitmap() const;
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RefPtr<Gfx::Bitmap const> bitmap() const;
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unsigned width() const;
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WebIDL::ExceptionOr<void> set_width(unsigned);
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unsigned height() const;
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WebIDL::ExceptionOr<void> set_height(unsigned);
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unsigned natural_width() const;
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unsigned natural_height() const;
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// https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-complete
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bool complete() const;
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virtual Optional<ARIA::Role> default_role() const override;
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// https://html.spec.whatwg.org/multipage/images.html#img-environment-changes
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void react_to_changes_in_the_environment();
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// https://html.spec.whatwg.org/multipage/images.html#update-the-image-data
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ErrorOr<void> update_the_image_data(bool restart_the_animations = false, bool maybe_omit_events = false);
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// https://html.spec.whatwg.org/multipage/images.html#use-srcset-or-picture
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[[nodiscard]] bool uses_srcset_or_picture() const;
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// https://html.spec.whatwg.org/multipage/rendering.html#restart-the-animation
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void restart_the_animation();
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// https://html.spec.whatwg.org/multipage/images.html#select-an-image-source
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[[nodiscard]] Optional<ImageSourceAndPixelDensity> select_an_image_source();
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void set_source_set(SourceSet);
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ImageRequest& current_request() { return *m_current_request; }
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ImageRequest const& current_request() const { return *m_current_request; }
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size_t current_frame_index() const { return m_current_frame_index; }
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// https://html.spec.whatwg.org/multipage/images.html#upgrade-the-pending-request-to-the-current-request
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void upgrade_pending_request_to_current_request();
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// ^Layout::ImageProvider
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virtual bool is_image_available() const override;
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virtual Optional<CSSPixels> intrinsic_width() const override;
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virtual Optional<CSSPixels> intrinsic_height() const override;
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virtual Optional<CSSPixelFraction> intrinsic_aspect_ratio() const override;
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virtual RefPtr<Gfx::ImmutableBitmap> current_image_bitmap(Gfx::IntSize = {}) const override;
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virtual void set_visible_in_viewport(bool) override;
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virtual void visit_edges(Cell::Visitor&) override;
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private:
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HTMLImageElement(DOM::Document&, DOM::QualifiedName);
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virtual bool is_html_image_element() const override { return true; }
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virtual void initialize(JS::Realm&) override;
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virtual void finalize() override;
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virtual void adopted_from(DOM::Document&) override;
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virtual void apply_presentational_hints(CSS::StyleProperties&) const override;
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virtual JS::GCPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
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virtual void did_set_viewport_rect(CSSPixelRect const&) override;
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void handle_successful_fetch(AK::URL const&, StringView mime_type, ImageRequest&, ByteBuffer, bool maybe_omit_events, AK::URL const& previous_url);
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void handle_failed_fetch();
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void add_callbacks_to_image_request(JS::NonnullGCPtr<ImageRequest>, bool maybe_omit_events, AK::URL const& url_string, AK::URL const& previous_url);
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void animate();
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RefPtr<Core::Timer> m_animation_timer;
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size_t m_current_frame_index { 0 };
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size_t m_loops_completed { 0 };
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Optional<DOM::DocumentLoadEventDelayer> m_load_event_delayer;
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CORSSettingAttribute m_cors_setting { CORSSettingAttribute::NoCORS };
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// https://html.spec.whatwg.org/multipage/images.html#last-selected-source
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// Each img element has a last selected source, which must initially be null.
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Optional<String> m_last_selected_source;
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// https://html.spec.whatwg.org/multipage/images.html#current-request
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JS::GCPtr<ImageRequest> m_current_request;
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// https://html.spec.whatwg.org/multipage/images.html#pending-request
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JS::GCPtr<ImageRequest> m_pending_request;
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SourceSet m_source_set;
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CSSPixelSize m_last_seen_viewport_size;
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};
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}
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namespace Web::DOM {
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template<>
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inline bool Node::fast_is<HTML::HTMLImageElement>() const { return is_html_image_element(); }
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}
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