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LibWeb: Use JS::HeapFunction for callbacks in SharedImageRequest

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If a function that captures a GC-allocated object is owned by another
GC-allocated object, it is more preferable to use JS::HeapFunction.
This is because JS::HeapFunction is visited, unlike introducing a new
heap root as JS::SafeFunction does.
This commit is contained in:
Aliaksandr Kalenik 2023-09-25 14:27:11 +02:00 • committed by Andreas Kling
parent 4f488f7e07
commit df86e52d75
4 changed files with 21 additions and 10 deletions
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20
Userland/Libraries/LibWeb/HTML/SharedImageRequest.cpp
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@ -48,6 +48,10 @@ void SharedImageRequest::visit_edges(JS::Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_fetch_controller);
for (auto& callback : m_callbacks) {
visitor.visit(callback.on_finish);
visitor.visit(callback.on_fail);
}
}
RefPtr<DecodedImageData const> SharedImageRequest::image_data() const
@ -99,7 +103,7 @@ void SharedImageRequest::fetch_image(JS::Realm& realm, JS::NonnullGCPtr<Fetch::I
set_fetch_controller(fetch_controller);
}
void SharedImageRequest::add_callbacks(JS::SafeFunction<void()> on_finish, JS::SafeFunction<void()> on_fail)
void SharedImageRequest::add_callbacks(Function<void()> on_finish, Function<void()> on_fail)
{
if (m_state == State::Finished) {
if (on_finish)
@ -113,7 +117,13 @@ void SharedImageRequest::add_callbacks(JS::SafeFunction<void()> on_finish, JS::S
return;
}
m_callbacks.append({ move(on_finish), move(on_fail) });
Callbacks callbacks;
if (on_finish)
callbacks.on_finish = JS::create_heap_function(vm().heap(), move(on_finish));
if (on_fail)
callbacks.on_fail = JS::create_heap_function(vm().heap(), move(on_fail));
m_callbacks.append(move(callbacks));
}
void SharedImageRequest::handle_successful_fetch(AK::URL const& url_string, StringView mime_type, ByteBuffer data)
@ -129,7 +139,7 @@ void SharedImageRequest::handle_successful_fetch(AK::URL const& url_string, Stri
m_state = State::Failed;
for (auto& callback : m_callbacks) {
if (callback.on_fail)
callback.on_fail();
callback.on_fail->function()();
}
};
@ -160,7 +170,7 @@ void SharedImageRequest::handle_successful_fetch(AK::URL const& url_string, Stri
for (auto& callback : m_callbacks) {
if (callback.on_finish)
callback.on_finish();
callback.on_finish->function()();
}
m_callbacks.clear();
}
@ -170,7 +180,7 @@ void SharedImageRequest::handle_failed_fetch()
m_state = State::Failed;
for (auto& callback : m_callbacks) {
if (callback.on_fail)
callback.on_fail();
callback.on_fail->function()();
}
m_callbacks.clear();
}