WindowServer: Split up WindowFrame::handle_mouse_event()

Break this function into a couple of smaller functions, one for each
of these areas:

- The titlebar
- The titlebar icon
- The menubar
- The border

Userland/Services/WindowServer/WindowFrame.cpp

@@ -647,22 +647,10 @@ Optional<HitTestResult> WindowFrame::hit_test(Gfx::IntPoint const& position) con
     return {};
 }
 
-void WindowFrame::on_mouse_event(const MouseEvent& event)
+bool WindowFrame::handle_titlebar_icon_mouse_event(MouseEvent const& event)
 {
-    VERIFY(!m_window.is_fullscreen());
-
     auto& wm = WindowManager::the();
-    if (m_window.type() != WindowType::Normal && m_window.type() != WindowType::ToolWindow && m_window.type() != WindowType::Notification)
-        return;
 
-    if (m_window.type() == WindowType::Normal || m_window.type() == WindowType::ToolWindow) {
-        if (event.type() == Event::MouseDown)
-            wm.move_to_front_and_make_active(m_window);
-
-        if (m_window.blocking_modal_window())
-            return;
-
-        if (titlebar_icon_rect().contains(event.position())) {
     if (event.type() == Event::MouseDown && (event.button() == MouseButton::Left || event.button() == MouseButton::Right)) {
         // Manually start a potential double click. Since we're opening
         // a menu, we will only receive the MouseDown event, so we
@@ -676,7 +664,7 @@ void WindowFrame::on_mouse_event(const MouseEvent& event)
         wm.start_menu_doubleclick(m_window, event);
 
         m_window.popup_window_menu(titlebar_rect().bottom_left().translated(rect().location()), WindowMenuDefaultAction::Close);
-                return;
+        return true;
     } else if (event.type() == Event::MouseUp && event.button() == MouseButton::Left) {
         // Since the MouseDown event opened a menu, another MouseUp
         // from the second click outside the menu wouldn't be considered
@@ -686,27 +674,26 @@ void WindowFrame::on_mouse_event(const MouseEvent& event)
             // It is a double click, so perform activate the default item
             m_window.window_menu_activate_default();
         }
-                return;
-            }
-        }
+        return true;
     }
+    return false;
+}
 
-    // This is slightly hackish, but expand the title bar rect by two pixels downwards,
-    // so that mouse events between the title bar and window contents don't act like
-    // mouse events on the border.
-    auto adjusted_titlebar_rect = titlebar_rect();
-    adjusted_titlebar_rect.set_height(adjusted_titlebar_rect.height() + 2);
-
-    if (adjusted_titlebar_rect.contains(event.position())) {
+void WindowFrame::handle_titlebar_mouse_event(MouseEvent const& event)
+{
+    auto& wm = WindowManager::the();
     wm.clear_resize_candidate();
 
-        if (event.type() == Event::MouseDown)
-            wm.move_to_front_and_make_active(m_window);
+    if (titlebar_icon_rect().contains(event.position())) {
+        if (handle_titlebar_icon_mouse_event(event))
+            return;
+    }
 
     for (auto& button : m_buttons) {
         if (button.relative_rect().contains(event.position()))
             return button.on_mouse_event(event.translated(-button.relative_rect().location()));
     }
+
     if (event.type() == Event::MouseDown) {
         if ((m_window.type() == WindowType::Normal || m_window.type() == WindowType::ToolWindow) && event.button() == MouseButton::Right) {
             auto default_action = m_window.is_maximized() ? WindowMenuDefaultAction::Restore : WindowMenuDefaultAction::Maximize;
@@ -716,6 +703,32 @@ void WindowFrame::on_mouse_event(const MouseEvent& event)
         if (m_window.is_movable() && event.button() == MouseButton::Left)
             wm.start_window_move(m_window, event.translated(rect().location()));
     }
+}
+
+void WindowFrame::handle_mouse_event(MouseEvent const& event)
+{
+    VERIFY(!m_window.is_fullscreen());
+
+    if (m_window.type() != WindowType::Normal && m_window.type() != WindowType::ToolWindow && m_window.type() != WindowType::Notification)
+        return;
+
+    auto& wm = WindowManager::the();
+    if (m_window.type() == WindowType::Normal || m_window.type() == WindowType::ToolWindow) {
+        if (event.type() == Event::MouseDown)
+            wm.move_to_front_and_make_active(m_window);
+    }
+
+    if (m_window.blocking_modal_window())
+        return;
+
+    // This is slightly hackish, but expand the title bar rect by two pixels downwards,
+    // so that mouse events between the title bar and window contents don't act like
+    // mouse events on the border.
+    auto adjusted_titlebar_rect = titlebar_rect();
+    adjusted_titlebar_rect.set_height(adjusted_titlebar_rect.height() + 2);
+
+    if (adjusted_titlebar_rect.contains(event.position())) {
+        handle_titlebar_mouse_event(event);
         return;
     }
 
@@ -726,7 +739,17 @@ void WindowFrame::on_mouse_event(const MouseEvent& event)
         return;
     }
 
-    if (m_window.is_resizable() && event.type() == Event::MouseMove && event.buttons() == 0) {
+    handle_border_mouse_event(event);
+}
+
+void WindowFrame::handle_border_mouse_event(const MouseEvent& event)
+{
+    if (!m_window.is_resizable())
+        return;
+
+    auto& wm = WindowManager::the();
+
+    if (event.type() == Event::MouseMove && event.buttons() == 0) {
         constexpr ResizeDirection direction_for_hot_area[3][3] = {
             { ResizeDirection::UpLeft, ResizeDirection::Up, ResizeDirection::UpRight },
             { ResizeDirection::Left, ResizeDirection::None, ResizeDirection::Right },
@@ -743,7 +766,7 @@ void WindowFrame::on_mouse_event(const MouseEvent& event)
         return;
     }
 
-    if (m_window.is_resizable() && event.type() == Event::MouseDown && event.button() == MouseButton::Left)
+    if (event.type() == Event::MouseDown && event.button() == MouseButton::Left)
         wm.start_window_resize(m_window, event.translated(rect().location()));
 }
 

Userland/Services/WindowServer/WindowFrame.h

@@ -35,7 +35,12 @@ public:
     void paint(Gfx::Painter&, const Gfx::IntRect&);
     void render(Gfx::Painter&);
     void render_to_cache();
-    void on_mouse_event(const MouseEvent&);
+
+    void handle_mouse_event(MouseEvent const&);
+    void handle_titlebar_mouse_event(MouseEvent const&);
+    bool handle_titlebar_icon_mouse_event(MouseEvent const&);
+    void handle_border_mouse_event(MouseEvent const&);
+
     void notify_window_rect_changed(const Gfx::IntRect& old_rect, const Gfx::IntRect& new_rect);
     void invalidate_titlebar();
     void invalidate(Gfx::IntRect relative_rect);

Userland/Services/WindowServer/WindowManager.cpp

@@ -1024,7 +1024,7 @@ void WindowManager::process_mouse_event(MouseEvent& event, Window*& hovered_wind
 
             if (window.frame().hit_test(event.position()).has_value()) {
                 // We are hitting the frame, pass the event along to WindowFrame.
-                window.frame().on_mouse_event(event.translated(-window.frame().rect().location()));
+                window.frame().handle_mouse_event(event.translated(-window.frame().rect().location()));
                 event_window_with_frame = &window;
             } else if (window.hit_test(event.position(), false).has_value()) {
                 // We are hitting the window content
@@ -1106,7 +1106,7 @@ void WindowManager::reevaluate_hovered_window(Window* updated_window)
                 hovered_window->dispatch_event(event);
             } else if (!hovered_window->is_frameless()) {
                 MouseEvent event(Event::MouseMove, cursor_location.translated(-hovered_window->frame().rect().location()), 0, MouseButton::None, 0);
-                hovered_window->frame().on_mouse_event(event);
+                hovered_window->frame().handle_mouse_event(event);
             }
         }
     }