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LibGUI: Don't spam WindowServer with SetWindowOverrideCursor messages
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. :^)
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2 changed files with 6 additions and 0 deletions
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@ -89,6 +89,7 @@ void Window::show()
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{
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if (is_visible())
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return;
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m_override_cursor = StandardCursor::None;
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auto response = WindowServerConnection::the().send_sync<Messages::WindowServer::CreateWindow>(
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m_rect_when_windowless,
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m_has_alpha_channel,
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@ -123,6 +124,7 @@ void Window::hide()
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m_pending_paint_event_rects.clear();
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m_back_bitmap = nullptr;
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m_front_bitmap = nullptr;
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m_override_cursor = StandardCursor::None;
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bool app_has_visible_windows = false;
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for (auto& window : *all_windows) {
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@ -183,7 +185,10 @@ void Window::set_override_cursor(StandardCursor cursor)
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{
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if (!is_visible())
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return;
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if (m_override_cursor == cursor)
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return;
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WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowOverrideCursor>(m_window_id, (u32)cursor);
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m_override_cursor = cursor;
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}
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void Window::event(Core::Event& event)
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