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LibWeb: Update HTML image loading algorithm with null checks from spec

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The spec has been updated to fix the missing null checks we found:
8f3d1fc6d1
This commit is contained in:
Andreas Kling 2023-06-11 06:53:40 +02:00
parent 2b89020b6c
commit 2e9b12d327
Notes: sideshowbarker 2024-07-17 02:14:39 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/2e9b12d327
Pull-request: https://github.com/SerenityOS/serenity/pull/19348
3 changed files with 29 additions and 31 deletions
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30
Userland/Libraries/LibWeb/HTML/HTMLImageElement.cpp
View file

@ -319,11 +319,8 @@ ErrorOr<void> HTMLImageElement::update_the_image_data(bool restart_animations)
entry->ignore_higher_layer_caching = true;
// 2. Abort the image request for the current request and the pending request.
m_current_request->abort(realm());
// FIXME: Spec bug? Seems like pending request can be null here.
if (m_pending_request)
m_pending_request->abort(realm());
abort_the_image_request(realm(), m_current_request);
abort_the_image_request(realm(), m_pending_request);
// 3. Set pending request to null.
m_pending_request = nullptr;
@ -379,11 +376,8 @@ after_step_6:
// abort the image request for the current request and the pending request,
// and set pending request to null.
m_current_request->set_state(ImageRequest::State::Broken);
m_current_request->abort(realm());
// FIXME: Spec bug? Seems like the image's pending request can be null here.
if (m_pending_request)
m_pending_request->abort(realm());
abort_the_image_request(realm(), m_current_request);
abort_the_image_request(realm(), m_pending_request);
m_pending_request = nullptr;
// 2. Queue an element task on the DOM manipulation task source given the img element and the following steps:
@ -406,11 +400,8 @@ after_step_6:
// If that is not successful, then:
if (!url_string.is_valid()) {
// 1. Abort the image request for the current request and the pending request.
m_current_request->abort(realm());
// FIXME: Spec bug? Seems like pending request can be null here.
if (m_pending_request)
m_pending_request->abort(realm());
abort_the_image_request(realm(), m_current_request);
abort_the_image_request(realm(), m_pending_request);
// 2. Set the current request's state to broken.
m_current_request->set_state(ImageRequest::State::Broken);
@ -440,9 +431,7 @@ after_step_6:
// queue an element task on the DOM manipulation task source given the img element
// to restart the animation if restart animation is set, and return.
if (url_string == m_current_request->current_url() && m_current_request->state() == ImageRequest::State::PartiallyAvailable) {
// FIXME: Spec bug? Seems like pending request can be null here.
if (m_pending_request)
m_pending_request->abort(realm());
abort_the_image_request(realm(), m_pending_request);
if (restart_animations) {
queue_an_element_task(HTML::Task::Source::DOMManipulation, [this] {
restart_the_animation();
@ -452,8 +441,7 @@ after_step_6:
}
// 14. If the pending request is not null, then abort the image request for the pending request.
if (m_pending_request)
m_pending_request->abort(realm());
abort_the_image_request(realm(), m_pending_request);
// 15. Set image request to a new image request whose current URL is urlString.
auto image_request = ImageRequest::create().release_value_but_fixme_should_propagate_errors();
@ -587,7 +575,7 @@ void HTMLImageElement::handle_successful_fetch(AK::URL const& url_string, String
// upgrade the pending request to the current request
// and prepare image request for presentation given the img element.
if (image_request == m_pending_request) {
m_current_request->abort(realm());
abort_the_image_request(realm(), m_current_request);
upgrade_pending_request_to_current_request();
image_request.prepare_for_presentation(*this);
}

23
Userland/Libraries/LibWeb/HTML/ImageRequest.cpp
View file

@ -48,17 +48,21 @@ void ImageRequest::set_current_url(AK::URL url)
}
// https://html.spec.whatwg.org/multipage/images.html#abort-the-image-request
void ImageRequest::abort(JS::Realm& realm)
void abort_the_image_request(JS::Realm& realm, ImageRequest* image_request)
{
// 1. Forget image request's image data, if any.
m_image_data = nullptr;
// 1. If image request is null, then return.
if (!image_request)
return;
// 2. Abort any instance of the fetching algorithm for image request,
// 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.
if (m_fetch_controller)
m_fetch_controller->abort(realm, {});
if (auto fetch_controller = image_request->fetch_controller())
fetch_controller->abort(realm, {});
m_fetch_controller = nullptr;
image_request->set_fetch_controller(nullptr);
}
RefPtr<DecodedImageData const> ImageRequest::image_data() const
@ -92,6 +96,11 @@ void ImageRequest::prepare_for_presentation(HTMLImageElement&)
// FIXME: 16. Update req's img element's presentation appropriately.
}
JS::GCPtr<Fetch::Infrastructure::FetchController> ImageRequest::fetch_controller()
{
return m_fetch_controller.ptr();
}
void ImageRequest::set_fetch_controller(JS::GCPtr<Fetch::Infrastructure::FetchController> fetch_controller)
{
m_fetch_controller = move(fetch_controller);

7
Userland/Libraries/LibWeb/HTML/ImageRequest.h
View file

@ -37,9 +37,6 @@ public:
AK::URL const& current_url() const;
void set_current_url(AK::URL);
// https://html.spec.whatwg.org/multipage/images.html#abort-the-image-request
void abort(JS::Realm&);
[[nodiscard]] RefPtr<DecodedImageData const> image_data() const;
void set_image_data(RefPtr<DecodedImageData const>);
@ -52,6 +49,7 @@ public:
// https://html.spec.whatwg.org/multipage/images.html#prepare-an-image-for-presentation
void prepare_for_presentation(HTMLImageElement&);
[[nodiscard]] JS::GCPtr<Fetch::Infrastructure::FetchController> fetch_controller();
void set_fetch_controller(JS::GCPtr<Fetch::Infrastructure::FetchController>);
private:
@ -80,4 +78,7 @@ private:
JS::Handle<Fetch::Infrastructure::FetchController> m_fetch_controller;
};
// https://html.spec.whatwg.org/multipage/images.html#abort-the-image-request
void abort_the_image_request(JS::Realm&, ImageRequest*);
}