WindowServer: Allow for more flexible tiling

The desktop can now be split up into halves (both vertical and
horizontal) and quarters by dragging a window into the corresponding
edge or corner.

This makes tiling behave more like you would expect from similiar
window managers.

Services/WindowServer/Window.cpp

@@ -598,19 +598,53 @@ void Window::set_fullscreen(bool fullscreen)
 Gfx::IntRect Window::tiled_rect(WindowTileType tiled) const
 {
     int frame_width = (m_frame.rect().width() - m_rect.width()) / 2;
+    int title_bar_height = m_frame.title_bar_rect().height();
+    int menu_height = WindowManager::the().maximized_window_rect(*this).y();
+    int max_height = WindowManager::the().maximized_window_rect(*this).height();
+
     switch (tiled) {
     case WindowTileType::None:
         return m_untiled_rect;
     case WindowTileType::Left:
         return Gfx::IntRect(0,
-            WindowManager::the().maximized_window_rect(*this).y(),
+            menu_height,
             Screen::the().width() / 2 - frame_width,
-            WindowManager::the().maximized_window_rect(*this).height());
+            max_height);
     case WindowTileType::Right:
         return Gfx::IntRect(Screen::the().width() / 2 + frame_width,
-            WindowManager::the().maximized_window_rect(*this).y(),
+            menu_height,
             Screen::the().width() / 2 - frame_width,
-            WindowManager::the().maximized_window_rect(*this).height());
+            max_height);
+    case WindowTileType::Top:
+        return Gfx::IntRect(0,
+            menu_height,
+            Screen::the().width() - frame_width,
+            (max_height - title_bar_height) / 2 - frame_width);
+    case WindowTileType::Bottom:
+        return Gfx::IntRect(0,
+            menu_height + (title_bar_height + max_height) / 2 + frame_width,
+            Screen::the().width() - frame_width,
+            (max_height - title_bar_height) / 2 - frame_width);
+    case WindowTileType::TopLeft:
+        return Gfx::IntRect(0,
+            menu_height,
+            Screen::the().width() / 2 - frame_width,
+            (max_height - title_bar_height) / 2 - frame_width);
+    case WindowTileType::TopRight:
+        return Gfx::IntRect(Screen::the().width() / 2 + frame_width,
+            menu_height,
+            Screen::the().width() / 2 - frame_width,
+            (max_height - title_bar_height) / 2 - frame_width);
+    case WindowTileType::BottomLeft:
+        return Gfx::IntRect(0,
+            menu_height + (title_bar_height + max_height) / 2 + frame_width,
+            Screen::the().width() / 2 - frame_width,
+            (max_height - title_bar_height) / 2);
+    case WindowTileType::BottomRight:
+        return Gfx::IntRect(Screen::the().width() / 2 + frame_width,
+            menu_height + (title_bar_height + max_height) / 2 + frame_width,
+            Screen::the().width() / 2 - frame_width,
+            (max_height - title_bar_height) / 2);
     default:
         ASSERT_NOT_REACHED();
     }

Services/WindowServer/Window.h

@@ -55,6 +55,12 @@ enum class WindowTileType {
     None = 0,
     Left,
     Right,
+    Top,
+    Bottom,
+    TopLeft,
+    TopRight,
+    BottomLeft,
+    BottomRight
 };
 
 enum class PopupMenuItem {

Services/WindowServer/WindowManager.cpp

@@ -528,7 +528,8 @@ bool WindowManager::process_ongoing_window_move(MouseEvent& event, Window*& hove
 
 #endif
 
-        const int maximization_deadzone = 2;
+        const int tiling_deadzone = 10;
+        const int secondary_deadzone = 2;
 
         if (m_move_window->is_maximized()) {
             auto pixels_moved_from_start = event.position().pixels_moved(m_move_origin);
@@ -536,7 +537,7 @@ bool WindowManager::process_ongoing_window_move(MouseEvent& event, Window*& hove
             if (pixels_moved_from_start > 5) {
                 // dbg() << "[WM] de-maximizing window";
                 m_move_origin = event.position();
-                if (m_move_origin.y() <= maximization_deadzone)
+                if (m_move_origin.y() <= secondary_deadzone)
                     return true;
                 auto width_before_resize = m_move_window->width();
                 m_move_window->set_maximized(false);
@@ -546,17 +547,26 @@ bool WindowManager::process_ongoing_window_move(MouseEvent& event, Window*& hove
         } else {
             bool is_resizable = m_move_window->is_resizable();
             auto pixels_moved_from_start = event.position().pixels_moved(m_move_origin);
-            const int tiling_deadzone = 5;
+            auto desktop = desktop_rect();
 
-            if (is_resizable && event.y() <= maximization_deadzone) {
-                m_move_window->set_tiled(WindowTileType::None);
-                m_move_window->set_maximized(true);
-                return true;
-            }
             if (is_resizable && event.x() <= tiling_deadzone) {
-                m_move_window->set_tiled(WindowTileType::Left);
+                if (event.y() <= tiling_deadzone + desktop.top())
+                    m_move_window->set_tiled(WindowTileType::TopLeft);
+                else if (event.y() >= desktop.height() - tiling_deadzone)
+                    m_move_window->set_tiled(WindowTileType::BottomLeft);
+                else
+                    m_move_window->set_tiled(WindowTileType::Left);
             } else if (is_resizable && event.x() >= Screen::the().width() - tiling_deadzone) {
-                m_move_window->set_tiled(WindowTileType::Right);
+                if (event.y() <= tiling_deadzone + desktop.top())
+                    m_move_window->set_tiled(WindowTileType::TopRight);
+                else if (event.y() >= desktop.height() - tiling_deadzone)
+                    m_move_window->set_tiled(WindowTileType::BottomRight);
+                else
+                    m_move_window->set_tiled(WindowTileType::Right);
+            } else if (is_resizable && event.y() <= secondary_deadzone + desktop.top()) {
+                m_move_window->set_tiled(WindowTileType::Top);
+            } else if (is_resizable && event.y() >= desktop.bottom() - secondary_deadzone) {
+                m_move_window->set_tiled(WindowTileType::Bottom);
             } else if (pixels_moved_from_start > 5 || m_move_window->tiled() == WindowTileType::None) {
                 m_move_window->set_tiled(WindowTileType::None);
                 Gfx::IntPoint pos = m_move_window_origin.translated(event.position() - m_move_origin);