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LibWeb: Don't take rendering task from queue while running rendering

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If event loop is already executing rendering task, we should not start
the next rendering task until the current one is finished.

Fixes https://github.com/LadybirdBrowser/ladybird/issues/3717
This commit is contained in:
Aliaksandr Kalenik
2025-02-27 15:41:15 +01:00
committed by Alexander Kalenik
parent b8af3fccf6
commit 4ca330adef
3 changed files with 11 additions and 5 deletions
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8
Libraries/LibWeb/HTML/EventLoop/EventLoop.cpp
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@@ -312,10 +312,10 @@ void EventLoop::process_input_events() const
// https://html.spec.whatwg.org/multipage/webappapis.html#update-the-rendering
void EventLoop::update_the_rendering()
{
VERIFY(!m_is_running_rendering_task);
m_is_running_rendering_task = true;
VERIFY(!m_running_rendering_task);
m_running_rendering_task = true;
ScopeGuard const guard = [this] {
m_is_running_rendering_task = false;
m_running_rendering_task = false;
};
process_input_events();
@@ -729,7 +729,7 @@ EventLoop::PauseHandle EventLoop::pause()
auto time_before_pause = HighResolutionTime::current_high_resolution_time(global);
// 3. If necessary, update the rendering or user interface of any Document or navigable to reflect the current state.
if (!m_is_running_rendering_task)
if (!m_running_rendering_task)
update_the_rendering();
// 4. Wait until the condition goal is met. While a user agent has a paused task, the corresponding event loop must