596eabe9e6
This patch adds HTML::ImageRequest and HTML::DecodedImageData. The latter had to use a different name than "ImageData", as there is already an IDL-exposed ImageData class in HTML.
100 lines
3.7 KiB
C++
100 lines
3.7 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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#include <LibGfx/Bitmap.h>
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#include <LibWeb/Fetch/Infrastructure/FetchController.h>
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#include <LibWeb/HTML/DecodedImageData.h>
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#include <LibWeb/HTML/ImageRequest.h>
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namespace Web::HTML {
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ErrorOr<NonnullRefPtr<ImageRequest>> ImageRequest::create()
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{
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return adopt_nonnull_ref_or_enomem(new (nothrow) ImageRequest);
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}
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ImageRequest::ImageRequest() = default;
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ImageRequest::~ImageRequest() = default;
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// https://html.spec.whatwg.org/multipage/images.html#img-available
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bool ImageRequest::is_available() const
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{
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// When an image request's state is either partially available or completely available, the image request is said to be available.
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return m_state == State::PartiallyAvailable || m_state == State::CompletelyAvailable;
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}
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ImageRequest::State ImageRequest::state() const
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{
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return m_state;
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}
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void ImageRequest::set_state(State state)
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{
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m_state = state;
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}
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AK::URL const& ImageRequest::current_url() const
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{
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return m_current_url;
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}
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void ImageRequest::set_current_url(AK::URL url)
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{
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m_current_url = move(url);
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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 ImageRequest::abort(JS::Realm& realm)
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{
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// 1. Forget image request's image data, if any.
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m_image_data = nullptr;
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// 2. Abort any instance of the fetching algorithm for image request,
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// discarding any pending tasks generated by that algorithm.
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if (m_fetch_controller)
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m_fetch_controller->abort(realm, {});
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m_fetch_controller = nullptr;
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}
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RefPtr<DecodedImageData const> ImageRequest::image_data() const
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{
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return m_image_data;
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}
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void ImageRequest::set_image_data(RefPtr<DecodedImageData const> data)
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{
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m_image_data = move(data);
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}
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// https://html.spec.whatwg.org/multipage/images.html#prepare-an-image-for-presentation
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void ImageRequest::prepare_for_presentation(HTMLImageElement&)
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{
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// FIXME: 1. Let exifTagMap be the EXIF tags obtained from req's image data, as defined by the relevant codec. [EXIF]
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// FIXME: 2. Let physicalWidth and physicalHeight be the width and height obtained from req's image data, as defined by the relevant codec.
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// FIXME: 3. Let dimX be the value of exifTagMap's tag 0xA002 (PixelXDimension).
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// FIXME: 4. Let dimY be the value of exifTagMap's tag 0xA003 (PixelYDimension).
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// FIXME: 5. Let resX be the value of exifTagMap's tag 0x011A (XResolution).
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// FIXME: 6. Let resY be the value of exifTagMap's tag 0x011B (YResolution).
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// FIXME: 7. Let resUnit be the value of exifTagMap's tag 0x0128 (ResolutionUnit).
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// FIXME: 8. If either dimX or dimY is not a positive integer, then return.
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// FIXME: 9. If either resX or resY is not a positive floating-point number, then return.
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// FIXME: 10. If resUnit is not equal to 2 (Inch), then return.
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// FIXME: 11. Let widthFromDensity be the value of physicalWidth, multiplied by 72 and divided by resX.
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// FIXME: 12. Let heightFromDensity be the value of physicalHeight, multiplied by 72 and divided by resY.
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// FIXME: 13. If widthFromDensity is not equal to dimX or heightFromDensity is not equal to dimY, then return.
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// FIXME: 14. If req's image data is CORS-cross-origin, then set img's intrinsic dimensions to dimX and dimY, scale img's pixel data accordingly, and return.
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// FIXME: 15. Set req's preferred density-corrected dimensions to a struct with its width set to dimX and its height set to dimY.
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// FIXME: 16. Update req's img element's presentation appropriately.
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}
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void ImageRequest::set_fetch_controller(JS::GCPtr<Fetch::Infrastructure::FetchController> fetch_controller)
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{
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m_fetch_controller = move(fetch_controller);
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}
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}
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