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LibGUI: Don't spam WindowServer with SetWindowOverrideCursor messages

Browse source 
Remember the override cursor in GUI::Window and avoid sending a message
to WindowServer when possible.

This removes a lot of synchronous IPC between Browser and WindowServer,
which noticeably improves DOM event responsiveness. :^)
This commit is contained in:
Andreas Kling 2020-03-22 01:07:07 +01:00
parent 065db26d7c
commit ec6e55cfc6
2 changed files with 6 additions and 0 deletions
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5
Libraries/LibGUI/Window.cpp
View file

@ -89,6 +89,7 @@ void Window::show()
{
if (is_visible())
return;
m_override_cursor = StandardCursor::None;
auto response = WindowServerConnection::the().send_sync<Messages::WindowServer::CreateWindow>(
m_rect_when_windowless,
m_has_alpha_channel,
@ -123,6 +124,7 @@ void Window::hide()
m_pending_paint_event_rects.clear();
m_back_bitmap = nullptr;
m_front_bitmap = nullptr;
m_override_cursor = StandardCursor::None;
bool app_has_visible_windows = false;
for (auto& window : *all_windows) {
@ -183,7 +185,10 @@ void Window::set_override_cursor(StandardCursor cursor)
{
if (!is_visible())
return;
if (m_override_cursor == cursor)
return;
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowOverrideCursor>(m_window_id, (u32)cursor);
m_override_cursor = cursor;
}
void Window::event(Core::Event& event)