mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 15:12:45 +00:00
934afcb9d5
This allows to partially solve the problem of cyclic dependency between HTMLImageElement and SharedImageRequest that prevents all image elements from being deallocated.
134 lines
4.9 KiB
C++
134 lines
4.9 KiB
C++
/*
|
|
* Copyright (c) 2023, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/HashTable.h>
|
|
#include <LibGfx/Bitmap.h>
|
|
#include <LibWeb/Fetch/Fetching/Fetching.h>
|
|
#include <LibWeb/Fetch/Infrastructure/FetchAlgorithms.h>
|
|
#include <LibWeb/Fetch/Infrastructure/FetchController.h>
|
|
#include <LibWeb/Fetch/Infrastructure/HTTP/Responses.h>
|
|
#include <LibWeb/HTML/AnimatedBitmapDecodedImageData.h>
|
|
#include <LibWeb/HTML/DecodedImageData.h>
|
|
#include <LibWeb/HTML/ImageRequest.h>
|
|
#include <LibWeb/HTML/ListOfAvailableImages.h>
|
|
#include <LibWeb/Platform/ImageCodecPlugin.h>
|
|
#include <LibWeb/SVG/SVGDecodedImageData.h>
|
|
|
|
namespace Web::HTML {
|
|
|
|
JS::NonnullGCPtr<ImageRequest> ImageRequest::create(JS::Realm& realm, Page& page)
|
|
{
|
|
return realm.heap().allocate<ImageRequest>(realm, page);
|
|
}
|
|
|
|
ImageRequest::ImageRequest(Page& page)
|
|
: m_page(page)
|
|
{
|
|
}
|
|
|
|
ImageRequest::~ImageRequest()
|
|
{
|
|
}
|
|
|
|
void ImageRequest::visit_edges(JS::Cell::Visitor& visitor)
|
|
{
|
|
Base::visit_edges(visitor);
|
|
visitor.visit(m_shared_image_request);
|
|
}
|
|
|
|
// https://html.spec.whatwg.org/multipage/images.html#img-available
|
|
bool ImageRequest::is_available() const
|
|
{
|
|
// When an image request's state is either partially available or completely available, the image request is said to be available.
|
|
return m_state == State::PartiallyAvailable || m_state == State::CompletelyAvailable;
|
|
}
|
|
|
|
bool ImageRequest::is_fetching() const
|
|
{
|
|
return m_shared_image_request && m_shared_image_request->is_fetching();
|
|
}
|
|
|
|
ImageRequest::State ImageRequest::state() const
|
|
{
|
|
return m_state;
|
|
}
|
|
|
|
void ImageRequest::set_state(State state)
|
|
{
|
|
m_state = state;
|
|
}
|
|
|
|
AK::URL const& ImageRequest::current_url() const
|
|
{
|
|
return m_current_url;
|
|
}
|
|
|
|
void ImageRequest::set_current_url(JS::Realm& realm, AK::URL url)
|
|
{
|
|
m_current_url = move(url);
|
|
if (m_current_url.is_valid())
|
|
m_shared_image_request = SharedImageRequest::get_or_create(realm, m_page, m_current_url);
|
|
}
|
|
|
|
// https://html.spec.whatwg.org/multipage/images.html#abort-the-image-request
|
|
void abort_the_image_request(JS::Realm&, ImageRequest* image_request)
|
|
{
|
|
// 1. If image request is null, then return.
|
|
if (!image_request)
|
|
return;
|
|
|
|
// 2. Forget image request's image data, if any.
|
|
image_request->set_image_data(nullptr);
|
|
|
|
// 3. Abort any instance of the fetching algorithm for image request,
|
|
// discarding any pending tasks generated by that algorithm.
|
|
// AD-HOC: We simply don't do this, since our SharedImageRequest may be used by someone else.
|
|
}
|
|
|
|
RefPtr<DecodedImageData const> ImageRequest::image_data() const
|
|
{
|
|
return m_image_data;
|
|
}
|
|
|
|
void ImageRequest::set_image_data(RefPtr<DecodedImageData const> data)
|
|
{
|
|
m_image_data = move(data);
|
|
}
|
|
|
|
// https://html.spec.whatwg.org/multipage/images.html#prepare-an-image-for-presentation
|
|
void ImageRequest::prepare_for_presentation(HTMLImageElement&)
|
|
{
|
|
// FIXME: 1. Let exifTagMap be the EXIF tags obtained from req's image data, as defined by the relevant codec. [EXIF]
|
|
// FIXME: 2. Let physicalWidth and physicalHeight be the width and height obtained from req's image data, as defined by the relevant codec.
|
|
// FIXME: 3. Let dimX be the value of exifTagMap's tag 0xA002 (PixelXDimension).
|
|
// FIXME: 4. Let dimY be the value of exifTagMap's tag 0xA003 (PixelYDimension).
|
|
// FIXME: 5. Let resX be the value of exifTagMap's tag 0x011A (XResolution).
|
|
// FIXME: 6. Let resY be the value of exifTagMap's tag 0x011B (YResolution).
|
|
// FIXME: 7. Let resUnit be the value of exifTagMap's tag 0x0128 (ResolutionUnit).
|
|
// FIXME: 8. If either dimX or dimY is not a positive integer, then return.
|
|
// FIXME: 9. If either resX or resY is not a positive floating-point number, then return.
|
|
// FIXME: 10. If resUnit is not equal to 2 (Inch), then return.
|
|
// FIXME: 11. Let widthFromDensity be the value of physicalWidth, multiplied by 72 and divided by resX.
|
|
// FIXME: 12. Let heightFromDensity be the value of physicalHeight, multiplied by 72 and divided by resY.
|
|
// FIXME: 13. If widthFromDensity is not equal to dimX or heightFromDensity is not equal to dimY, then return.
|
|
// 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.
|
|
// FIXME: 15. Set req's preferred density-corrected dimensions to a struct with its width set to dimX and its height set to dimY.
|
|
// FIXME: 16. Update req's img element's presentation appropriately.
|
|
}
|
|
|
|
void ImageRequest::fetch_image(JS::Realm& realm, JS::NonnullGCPtr<Fetch::Infrastructure::Request> request)
|
|
{
|
|
VERIFY(m_shared_image_request);
|
|
m_shared_image_request->fetch_image(realm, request);
|
|
}
|
|
|
|
void ImageRequest::add_callbacks(JS::SafeFunction<void()> on_finish, JS::SafeFunction<void()> on_fail)
|
|
{
|
|
VERIFY(m_shared_image_request);
|
|
m_shared_image_request->add_callbacks(move(on_finish), move(on_fail));
|
|
}
|
|
|
|
}
|