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LibWeb: Handle document/navigable disconnection during favicon decode

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If the document is disconnected from the navigable by the time a favicon
decode completes successfully, we don't want to show the favicon for
whatever document is now loaded in the navigable.

Fix this by deferring getting the navigable until after the decode has
completed.
This commit is contained in:
Andreas Kling 2024-08-21 14:52:51 +02:00 • committed by Andreas Kling
commit 5606ce412e
Notes: github-actions[bot] 2024-08-22 07:35:49 +00:00
1 changed files with 5 additions and 4 deletions
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9
Userland/Libraries/LibWeb/HTML/HTMLLinkElement.cpp
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@ -520,16 +520,17 @@ void HTMLLinkElement::resource_did_load_favicon()
document().check_favicon_after_loading_link_resource(); document().check_favicon_after_loading_link_resource();
} }
static NonnullRefPtr<Core::Promise<Web::Platform::DecodedImage>> decode_favicon(ReadonlyBytes favicon_data, URL::URL const& favicon_url, JS::GCPtr<Navigable> navigable) static NonnullRefPtr<Core::Promise<Web::Platform::DecodedImage>> decode_favicon(ReadonlyBytes favicon_data, URL::URL const& favicon_url, JS::NonnullGCPtr<DOM::Document> document)
{ {
auto on_failed_decode = [favicon_url]([[maybe_unused]] Error& error) { auto on_failed_decode = [favicon_url]([[maybe_unused]] Error& error) {
dbgln_if(IMAGE_DECODER_DEBUG, "Failed to decode favicon {}: {}", favicon_url, error); dbgln_if(IMAGE_DECODER_DEBUG, "Failed to decode favicon {}: {}", favicon_url, error);
}; };
auto on_successful_decode = [navigable = JS::Handle(*navigable)](Web::Platform::DecodedImage& decoded_image) -> ErrorOr<void> { auto on_successful_decode = [document = JS::Handle(document)](Web::Platform::DecodedImage& decoded_image) -> ErrorOr<void> {
auto favicon_bitmap = decoded_image.frames[0].bitmap; auto favicon_bitmap = decoded_image.frames[0].bitmap;
dbgln_if(IMAGE_DECODER_DEBUG, "Decoded favicon, {}", favicon_bitmap->size()); dbgln_if(IMAGE_DECODER_DEBUG, "Decoded favicon, {}", favicon_bitmap->size());
auto navigable = document->navigable();
if (navigable && navigable->is_traversable()) if (navigable && navigable->is_traversable())
navigable->traversable_navigable()->page().client().page_did_change_favicon(*favicon_bitmap); navigable->traversable_navigable()->page().client().page_did_change_favicon(*favicon_bitmap);
@ -547,7 +548,7 @@ bool HTMLLinkElement::load_favicon_and_use_if_window_is_active()
return false; return false;
// FIXME: Refactor the caller(s) to handle the async nature of image loading // FIXME: Refactor the caller(s) to handle the async nature of image loading
auto promise = decode_favicon(resource()->encoded_data(), resource()->url(), navigable()); auto promise = decode_favicon(resource()->encoded_data(), resource()->url(), document());
auto result = promise->await(); auto result = promise->await();
return !result.is_error(); return !result.is_error();
} }
@ -583,7 +584,7 @@ WebIDL::ExceptionOr<void> HTMLLinkElement::load_fallback_favicon_if_needed(JS::N
auto global = JS::NonnullGCPtr { realm.global_object() }; auto global = JS::NonnullGCPtr { realm.global_object() };
auto process_body = JS::create_heap_function(realm.heap(), [document, request](ByteBuffer body) { auto process_body = JS::create_heap_function(realm.heap(), [document, request](ByteBuffer body) {
(void)decode_favicon(body, request->url(), document->navigable()); (void)decode_favicon(body, request->url(), document);
}); });
auto process_body_error = JS::create_heap_function(realm.heap(), [](JS::Value) { auto process_body_error = JS::create_heap_function(realm.heap(), [](JS::Value) {
}); });