c648e24cff
We achieve this by adding a new Layout::ImageProvider class and having both HTMLImageElement and HTMLObjectElement inherit from it. The HTML spec is vague on how object image loading should work, which is why this first pass is focusing on image elements.
119 lines
3.9 KiB
C++
119 lines
3.9 KiB
C++
/*
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* Copyright (c) 2018-2020, 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 <LibWeb/DOM/DocumentLoadEventDelayer.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/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 Layout::ImageProvider {
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WEB_PLATFORM_OBJECT(HTMLImageElement, HTMLElement);
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FORM_ASSOCIATED_ELEMENT(HTMLElement, HTMLImageElement)
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public:
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virtual ~HTMLImageElement() override;
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virtual void parse_attribute(DeprecatedFlyString const& name, DeprecatedString const& value) override;
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virtual void did_remove_attribute(DeprecatedFlyString const& name) override;
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DeprecatedString alt() const { return attribute(HTML::AttributeNames::alt); }
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DeprecatedString src() const { return attribute(HTML::AttributeNames::src); }
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RefPtr<Gfx::Bitmap const> bitmap() const;
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unsigned width() const;
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void set_width(unsigned);
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unsigned height() const;
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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#update-the-image-data
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ErrorOr<void> update_the_image_data(bool restart_the_animations = 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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enum class LazyLoading {
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Lazy,
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Eager,
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};
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[[nodiscard]] LazyLoading lazy_loading() const;
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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 RefPtr<Gfx::Bitmap const> current_image_bitmap() const override;
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virtual void set_visible_in_viewport(bool) override;
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private:
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HTMLImageElement(DOM::Document&, DOM::QualifiedName);
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virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) 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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void handle_successful_fetch(AK::URL const&, ImageRequest&, ByteBuffer);
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void handle_failed_fetch();
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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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RefPtr<ImageRequest> m_current_request;
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// https://html.spec.whatwg.org/multipage/images.html#pending-request
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RefPtr<ImageRequest> m_pending_request;
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SourceSet m_source_set;
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};
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}
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