f70d3faa0f
This forces us to diverge from the spec, but it's for a good cause: by moving it into ImageRequest, we'll be able to reuse fetching and decoding logic from CSS and other places. This patch also makes ImageRequests shareable, currently keyed by the URL (this part needs improvement!)
100 lines
3.6 KiB
C++
100 lines
3.6 KiB
C++
/*
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* Copyright (c) 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/Error.h>
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#include <AK/OwnPtr.h>
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#include <AK/URL.h>
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#include <LibGfx/Size.h>
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#include <LibJS/Heap/Handle.h>
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#include <LibWeb/Forward.h>
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namespace Web::HTML {
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// https://html.spec.whatwg.org/multipage/images.html#image-request
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class ImageRequest : public RefCounted<ImageRequest> {
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public:
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static ErrorOr<NonnullRefPtr<ImageRequest>> create(Page&);
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static ErrorOr<NonnullRefPtr<ImageRequest>> get_shareable_or_create(Page&, AK::URL const&);
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~ImageRequest();
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// https://html.spec.whatwg.org/multipage/images.html#img-req-state
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enum class State {
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Unavailable,
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PartiallyAvailable,
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CompletelyAvailable,
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Broken,
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};
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bool is_available() const;
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State state() const;
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void set_state(State);
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AK::URL const& current_url() const;
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void set_current_url(AK::URL);
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[[nodiscard]] RefPtr<DecodedImageData const> image_data() const;
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void set_image_data(RefPtr<DecodedImageData const>);
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[[nodiscard]] float current_pixel_density() const { return m_current_pixel_density; }
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void set_current_pixel_density(float density) { m_current_pixel_density = density; }
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[[nodiscard]] Optional<Gfx::FloatSize> const& preferred_density_corrected_dimensions() const { return m_preferred_density_corrected_dimensions; }
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void set_preferred_density_corrected_dimensions(Optional<Gfx::FloatSize> dimensions) { m_preferred_density_corrected_dimensions = move(dimensions); }
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// https://html.spec.whatwg.org/multipage/images.html#prepare-an-image-for-presentation
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void prepare_for_presentation(HTMLImageElement&);
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[[nodiscard]] JS::GCPtr<Fetch::Infrastructure::FetchController> fetch_controller();
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void set_fetch_controller(JS::GCPtr<Fetch::Infrastructure::FetchController>);
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void fetch_image(JS::Realm&, JS::NonnullGCPtr<Fetch::Infrastructure::Request>);
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void add_callbacks(JS::SafeFunction<void()> on_finish, JS::SafeFunction<void()> on_fail);
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private:
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explicit ImageRequest(Page&);
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void handle_successful_fetch(AK::URL const&, StringView mime_type, ByteBuffer data);
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void handle_failed_fetch();
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Page& m_page;
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struct Callbacks {
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JS::SafeFunction<void()> on_finish;
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JS::SafeFunction<void()> on_fail;
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};
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Vector<Callbacks> m_callbacks;
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// https://html.spec.whatwg.org/multipage/images.html#img-req-state
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// An image request's state is initially unavailable.
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State m_state { State::Unavailable };
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// https://html.spec.whatwg.org/multipage/images.html#img-req-url
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// An image request's current URL is initially the empty string.
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AK::URL m_current_url;
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// https://html.spec.whatwg.org/multipage/images.html#img-req-data
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RefPtr<DecodedImageData const> m_image_data;
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// https://html.spec.whatwg.org/multipage/images.html#current-pixel-density
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// Each image request has a current pixel density, which must initially be 1.
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float m_current_pixel_density { 1 };
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// https://html.spec.whatwg.org/multipage/images.html#preferred-density-corrected-dimensions
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// Each image request has preferred density-corrected dimensions,
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// which is either a struct consisting of a width and a height or is null. It must initially be null.
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Optional<Gfx::FloatSize> m_preferred_density_corrected_dimensions;
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JS::Handle<Fetch::Infrastructure::FetchController> m_fetch_controller;
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};
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// https://html.spec.whatwg.org/multipage/images.html#abort-the-image-request
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void abort_the_image_request(JS::Realm&, ImageRequest*);
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}
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