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LibWeb: Add a flag to pause an HTML event loop's execution

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This will be used to unblock the WebContent IPC event loop while waiting
for a dialog response.
This commit is contained in:
Timothy Flynn 2022-11-15 15:27:58 -05:00 • committed by Linus Groh
parent 894bddf62c
commit 4b8729aea6
2 changed files with 12 additions and 0 deletions
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6
Userland/Libraries/LibWeb/HTML/EventLoop/EventLoop.h
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@ -73,6 +73,10 @@ public:
double compute_deadline() const; double compute_deadline() const;
// https://html.spec.whatwg.org/multipage/webappapis.html#pause
void set_execution_paused(bool execution_paused) { m_execution_paused = execution_paused; }
bool execution_paused() const { return m_execution_paused; }
private: private:
Type m_type { Type::Window }; Type m_type { Type::Window };
@ -104,6 +108,8 @@ private:
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#termination-nesting-level // https://html.spec.whatwg.org/multipage/browsing-the-web.html#termination-nesting-level
size_t m_termination_nesting_level { 0 }; size_t m_termination_nesting_level { 0 };
bool m_execution_paused { false };
}; };
EventLoop& main_thread_event_loop(); EventLoop& main_thread_event_loop();

6
Userland/Libraries/LibWeb/HTML/EventLoop/TaskQueue.cpp
View file

@ -24,6 +24,9 @@ void TaskQueue::add(NonnullOwnPtr<Task> task)
OwnPtr<Task> TaskQueue::take_first_runnable() OwnPtr<Task> TaskQueue::take_first_runnable()
{ {
if (m_event_loop.execution_paused())
return nullptr;
for (size_t i = 0; i < m_tasks.size(); ++i) { for (size_t i = 0; i < m_tasks.size(); ++i) {
if (m_tasks[i]->is_runnable()) if (m_tasks[i]->is_runnable())
return m_tasks.take(i); return m_tasks.take(i);
@ -33,6 +36,9 @@ OwnPtr<Task> TaskQueue::take_first_runnable()
bool TaskQueue::has_runnable_tasks() const bool TaskQueue::has_runnable_tasks() const
{ {
if (m_event_loop.execution_paused())
return false;
for (auto& task : m_tasks) { for (auto& task : m_tasks) {
if (task->is_runnable()) if (task->is_runnable())
return true; return true;