WindowServer: Consolidate tiled and maximized window rects calculation

Calculating tiled and miximized window frame have a lot in common. In
fact, we can look at maximized window state as a special case of the
tile type. It simplifies the code since there is a lot of cases when
we take an action only if the window is maximized or tiled.

5 files changed, 91 insertions, 164 deletions

diff --git a/Userland/Services/WindowServer/Window.cpp b/Userland/Services/WindowServer/Window.cpp
index 5c9ade0825..daae361091 100644
--- a/Userland/Services/WindowServer/Window.cpp
+++ b/Userland/Services/WindowServer/Window.cpp
@@ -294,12 +294,12 @@ void Window::update_window_menu_items()
     m_window_menu_minimize_item->set_text(m_minimized_state != WindowMinimizedState::None ? "&Unminimize" : "Mi&nimize");
     m_window_menu_minimize_item->set_enabled(m_minimizable);
 
-    m_window_menu_maximize_item->set_text(m_maximized ? "&Restore" : "Ma&ximize");
+    m_window_menu_maximize_item->set_text(is_maximized() ? "&Restore" : "Ma&ximize");
     m_window_menu_maximize_item->set_enabled(m_resizable);
 
     m_window_menu_close_item->set_enabled(m_closeable);
 
-    m_window_menu_move_item->set_enabled(m_minimized_state == WindowMinimizedState::None && !m_maximized && !m_fullscreen);
+    m_window_menu_move_item->set_enabled(m_minimized_state == WindowMinimizedState::None && !is_maximized() && !m_fullscreen);
 }
 
 void Window::set_minimized(bool minimized)
@@ -476,16 +476,15 @@ void Window::set_occluded(bool occluded)
 
 void Window::set_maximized(bool maximized, Optional<Gfx::IntPoint> fixed_point)
 {
-    if (m_maximized == maximized)
+    if (is_maximized() == maximized)
         return;
     if (maximized && (!is_resizable() || resize_aspect_ratio().has_value()))
         return;
-    m_tile_type = WindowTileType::None;
-    m_maximized = maximized;
+    m_tile_type = maximized ? WindowTileType::Maximized : WindowTileType::None;
     update_window_menu_items();
     if (maximized) {
         m_unmaximized_rect = m_floating_rect;
-        set_rect(WindowManager::the().maximized_window_rect(*this));
+        set_rect(WindowManager::the().tiled_window_rect(*this));
     } else {
         if (fixed_point.has_value()) {
             auto new_rect = Gfx::IntRect(m_rect);
@@ -837,7 +836,7 @@ void Window::handle_window_menu_action(WindowMenuAction action)
             WindowManager::the().move_to_front_and_make_active(*this);
         break;
     case WindowMenuAction::MaximizeOrRestore:
-        WindowManager::the().maximize_windows(*this, !m_maximized);
+        WindowManager::the().maximize_windows(*this, !is_maximized());
         WindowManager::the().move_to_front_and_make_active(*this);
         break;
     case WindowMenuAction::Move:
@@ -881,7 +880,7 @@ void Window::popup_window_menu(const Gfx::IntPoint& position, WindowMenuDefaultA
     m_window_menu_minimize_item->set_default(default_action == WindowMenuDefaultAction::Minimize || default_action == WindowMenuDefaultAction::Unminimize);
     m_window_menu_minimize_item->set_icon(m_minimized_state != WindowMinimizedState::None ? nullptr : &minimize_icon());
     m_window_menu_maximize_item->set_default(default_action == WindowMenuDefaultAction::Maximize || default_action == WindowMenuDefaultAction::Restore);
-    m_window_menu_maximize_item->set_icon(m_maximized ? &restore_icon() : &maximize_icon());
+    m_window_menu_maximize_item->set_icon(is_maximized() ? &restore_icon() : &maximize_icon());
     m_window_menu_close_item->set_default(default_action == WindowMenuDefaultAction::Close);
     m_window_menu_menubar_visibility_item->set_enabled(m_menubar.has_menus());
     m_window_menu_menubar_visibility_item->set_checked(m_menubar.has_menus() && m_should_show_menubar);
@@ -921,118 +920,6 @@ void Window::set_fullscreen(bool fullscreen)
     set_rect(new_window_rect);
 }
 
-Gfx::IntRect Window::tiled_rect(Screen* target_screen, WindowTileType tile_type) const
-{
-    if (!target_screen) {
-        // If no explicit target screen was supplied,
-        // guess based on the current frame rectangle
-        target_screen = &Screen::closest_to_rect(frame().rect());
-    }
-
-    VERIFY(tile_type != WindowTileType::None);
-
-    int frame_width = (m_frame.rect().width() - m_rect.width()) / 2;
-    int titlebar_height = m_frame.titlebar_rect().height();
-    auto maximized_rect_relative_to_window_screen = WindowManager::the().maximized_window_rect(*this, true);
-    int menu_height = maximized_rect_relative_to_window_screen.y();
-    int max_height = maximized_rect_relative_to_window_screen.height();
-
-    auto& screen = *target_screen;
-    auto screen_location = screen.rect().location();
-    switch (tile_type) {
-    case WindowTileType::Left:
-        return Gfx::IntRect(0,
-            menu_height,
-            screen.width() / 2 - frame_width,
-            max_height)
-            .translated(screen_location);
-    case WindowTileType::Right: {
-        Gfx::IntPoint location {
-            screen.width() / 2 + frame_width,
-            menu_height
-        };
-        return Gfx::IntRect(
-            location,
-            { screen.width() - location.x(), max_height })
-            .translated(screen_location);
-    }
-    case WindowTileType::Top:
-        return Gfx::IntRect(0,
-            menu_height,
-            screen.width(),
-            (max_height - titlebar_height) / 2 - frame_width)
-            .translated(screen_location);
-    case WindowTileType::Bottom: {
-        Gfx::IntPoint location {
-            0,
-            menu_height + (titlebar_height + max_height) / 2 + frame_width
-        };
-        return Gfx::IntRect(
-            location,
-            { screen.width(), screen.height() - location.y() })
-            .translated(screen_location);
-    }
-    case WindowTileType::TopLeft:
-        return Gfx::IntRect(0,
-            menu_height,
-            screen.width() / 2 - frame_width,
-            (max_height - titlebar_height) / 2 - frame_width)
-            .translated(screen_location);
-    case WindowTileType::TopRight: {
-        Gfx::IntPoint location {
-            screen.width() / 2 + frame_width,
-            menu_height
-        };
-        return Gfx::IntRect(
-            location,
-            { screen.width() - location.x(), (max_height - titlebar_height) / 2 - frame_width })
-            .translated(screen_location);
-    }
-    case WindowTileType::BottomLeft: {
-        Gfx::IntPoint location {
-            0,
-            menu_height + (titlebar_height + max_height) / 2 + frame_width
-        };
-        return Gfx::IntRect(
-            location,
-            { screen.width() / 2 - frame_width, screen.height() - location.y() })
-            .translated(screen_location);
-    }
-    case WindowTileType::BottomRight: {
-        Gfx::IntPoint location {
-            screen.width() / 2 + frame_width,
-            menu_height + (titlebar_height + max_height) / 2 + frame_width
-        };
-        return Gfx::IntRect(
-            location,
-            { screen.width() - location.x(), screen.height() - location.y() })
-            .translated(screen_location);
-    }
-    case WindowTileType::VerticallyMaximized: {
-        Gfx::IntPoint location {
-            floating_rect().location().x(),
-            menu_height
-        };
-        return Gfx::IntRect(
-            location,
-            { floating_rect().width(), max_height })
-            .translated(screen_location);
-    }
-    case WindowTileType::HorizontallyMaximized: {
-        Gfx::IntPoint location {
-            0,
-            floating_rect().location().y()
-        };
-        return Gfx::IntRect(
-            location,
-            { screen.width(), floating_rect().height() })
-            .translated(screen_location);
-    }
-    default:
-        VERIFY_NOT_REACHED();
-    }
-}
-
 WindowTileType Window::tile_type_based_on_rect(Gfx::IntRect const& rect) const
 {
     auto& window_screen = Screen::closest_to_rect(this->rect()); // based on currently used rect
@@ -1044,7 +931,7 @@ WindowTileType Window::tile_type_based_on_rect(Gfx::IntRect const& rect) const
         bool tiling_to_left = current_tile_type == WindowTileType::Left || current_tile_type == WindowTileType::TopLeft || current_tile_type == WindowTileType::BottomLeft;
         bool tiling_to_right = current_tile_type == WindowTileType::Right || current_tile_type == WindowTileType::TopRight || current_tile_type == WindowTileType::BottomRight;
 
-        auto ideal_tiled_rect = tiled_rect(&window_screen, current_tile_type);
+        auto ideal_tiled_rect = WindowManager::the().tiled_window_rect(*this, current_tile_type);
         bool same_top = ideal_tiled_rect.top() == rect.top();
         bool same_left = ideal_tiled_rect.left() == rect.left();
         bool same_right = ideal_tiled_rect.right() == rect.right();
@@ -1056,9 +943,9 @@ WindowTileType Window::tile_type_based_on_rect(Gfx::IntRect const& rect) const
         if (tiling_to_top && same_top && same_left && same_right)
             return WindowTileType::Top;
         else if ((tiling_to_top || tiling_to_left) && same_top && same_left)
-            return rect.bottom() == tiled_rect(&window_screen, WindowTileType::Bottom).bottom() ? WindowTileType::Left : WindowTileType::TopLeft;
+            return rect.bottom() == WindowManager::the().tiled_window_rect(*this, WindowTileType::Bottom).bottom() ? WindowTileType::Left : WindowTileType::TopLeft;
         else if ((tiling_to_top || tiling_to_right) && same_top && same_right)
-            return rect.bottom() == tiled_rect(&window_screen, WindowTileType::Bottom).bottom() ? WindowTileType::Right : WindowTileType::TopRight;
+            return rect.bottom() == WindowManager::the().tiled_window_rect(*this, WindowTileType::Bottom).bottom() ? WindowTileType::Right : WindowTileType::TopRight;
         else if (tiling_to_left && same_left && same_top && same_bottom)
             return WindowTileType::Left;
         else if (tiling_to_right && same_right && same_top && same_bottom)
@@ -1066,9 +953,9 @@ WindowTileType Window::tile_type_based_on_rect(Gfx::IntRect const& rect) const
         else if (tiling_to_bottom && same_bottom && same_left && same_right)
             return WindowTileType::Bottom;
         else if ((tiling_to_bottom || tiling_to_left) && same_bottom && same_left)
-            return rect.top() == tiled_rect(&window_screen, WindowTileType::Left).top() ? WindowTileType::Left : WindowTileType::BottomLeft;
+            return rect.top() == WindowManager::the().tiled_window_rect(*this, WindowTileType::Left).top() ? WindowTileType::Left : WindowTileType::BottomLeft;
         else if ((tiling_to_bottom || tiling_to_right) && same_bottom && same_right)
-            return rect.top() == tiled_rect(&window_screen, WindowTileType::Right).top() ? WindowTileType::Right : WindowTileType::BottomRight;
+            return rect.top() == WindowManager::the().tiled_window_rect(*this, WindowTileType::Right).top() ? WindowTileType::Right : WindowTileType::BottomRight;
     }
     return tile_type;
 }
@@ -1111,7 +998,7 @@ bool Window::set_untiled(Optional<Gfx::IntPoint> fixed_point)
     return true;
 }
 
-void Window::set_tiled(Screen* screen, WindowTileType tile_type)
+void Window::set_tiled(WindowTileType tile_type)
 {
     VERIFY(tile_type != WindowTileType::None);
 
@@ -1126,7 +1013,7 @@ void Window::set_tiled(Screen* screen, WindowTileType tile_type)
 
     m_tile_type = tile_type;
 
-    set_rect(tiled_rect(screen, tile_type));
+    set_rect(WindowManager::the().tiled_window_rect(*this, tile_type));
     Core::EventLoop::current().post_event(*this, make<ResizeEvent>(m_rect));
 }
 
@@ -1142,9 +1029,7 @@ void Window::recalculate_rect()
 
     bool send_event = true;
     if (is_tiled()) {
-        set_rect(tiled_rect(nullptr, m_tile_type));
-    } else if (is_maximized()) {
-        set_rect(WindowManager::the().maximized_window_rect(*this));
+        set_rect(WindowManager::the().tiled_window_rect(*this, m_tile_type));
     } else if (type() == WindowType::Desktop) {
         set_rect(WindowManager::the().arena_rect_for_type(Screen::main(), WindowType::Desktop));
     } else {
diff --git a/Userland/Services/WindowServer/Window.h b/Userland/Services/WindowServer/Window.h
index b595605dcb..253c77f90d 100644
--- a/Userland/Services/WindowServer/Window.h
+++ b/Userland/Services/WindowServer/Window.h
@@ -51,6 +51,7 @@ enum class WindowTileType {
     BottomRight,
     VerticallyMaximized,
     HorizontallyMaximized,
+    Maximized,
 };
 
 enum class WindowMenuAction {
@@ -107,7 +108,7 @@ public:
     bool is_resizable() const { return m_resizable && !m_fullscreen; }
     void set_resizable(bool);
 
-    bool is_maximized() const { return m_maximized; }
+    bool is_maximized() const { return m_tile_type == WindowTileType::Maximized; }
     void set_maximized(bool, Optional<Gfx::IntPoint> fixed_point = {});
 
     bool is_always_on_top() const { return m_always_on_top; }
@@ -118,7 +119,7 @@ public:
 
     WindowTileType tile_type() const { return m_tile_type; }
     bool is_tiled() const { return m_tile_type != WindowTileType::None; }
-    void set_tiled(Screen*, WindowTileType);
+    void set_tiled(WindowTileType);
     WindowTileType tile_type_based_on_rect(Gfx::IntRect const&) const;
     void check_untile_due_to_resize(Gfx::IntRect const&);
     bool set_untiled(Optional<Gfx::IntPoint> fixed_point = {});
@@ -291,7 +292,6 @@ public:
 
     void start_launch_animation(Gfx::IntRect const&);
 
-    Gfx::IntRect tiled_rect(Screen*, WindowTileType) const;
     void recalculate_rect();
 
     IntrusiveListNode<Window> m_list_node;
@@ -423,7 +423,6 @@ private:
     bool m_resizable { false };
     Optional<Gfx::IntSize> m_resize_aspect_ratio {};
     WindowMinimizedState m_minimized_state { WindowMinimizedState::None };
-    bool m_maximized { false };
     bool m_fullscreen { false };
     bool m_accessory { false };
     bool m_destroyed { false };
diff --git a/Userland/Services/WindowServer/WindowFrame.cpp b/Userland/Services/WindowServer/WindowFrame.cpp
index 751038f981..5710d7f856 100644
--- a/Userland/Services/WindowServer/WindowFrame.cpp
+++ b/Userland/Services/WindowServer/WindowFrame.cpp
@@ -84,18 +84,16 @@ void WindowFrame::window_was_constructed(Badge<Window>)
             m_window.handle_window_menu_action(WindowMenuAction::MaximizeOrRestore);
         });
         button->on_middle_click = [&](auto&) {
-            auto& window_screen = Screen::closest_to_location(m_window.rect().location());
             if (m_window.tile_type() == WindowTileType::VerticallyMaximized)
                 m_window.set_untiled();
             else
-                m_window.set_tiled(&window_screen, WindowTileType::VerticallyMaximized);
+                m_window.set_tiled(WindowTileType::VerticallyMaximized);
         };
         button->on_secondary_click = [&](auto&) {
-            auto& window_screen = Screen::closest_to_location(m_window.rect().location());
             if (m_window.tile_type() == WindowTileType::HorizontallyMaximized)
                 m_window.set_untiled();
             else
-                m_window.set_tiled(&window_screen, WindowTileType::HorizontallyMaximized);
+                m_window.set_tiled(WindowTileType::HorizontallyMaximized);
         };
         m_maximize_button = button.ptr();
         m_buttons.append(move(button));
@@ -543,7 +541,7 @@ Gfx::IntRect WindowFrame::rect() const
 
 Gfx::IntRect WindowFrame::constrained_render_rect_to_screen(const Gfx::IntRect& render_rect) const
 {
-    if (m_window.is_maximized() || m_window.is_tiled())
+    if (m_window.is_tiled())
         return render_rect.intersected(Screen::closest_to_rect(rect()).rect());
     return render_rect;
 }
diff --git a/Userland/Services/WindowServer/WindowManager.cpp b/Userland/Services/WindowServer/WindowManager.cpp
index e3fec05163..f0f57e4147 100644
--- a/Userland/Services/WindowServer/WindowManager.cpp
+++ b/Userland/Services/WindowServer/WindowManager.cpp
@@ -674,7 +674,7 @@ void WindowManager::start_window_move(Window& window, Gfx::IntPoint const& origi
     m_move_window->set_default_positioned(false);
     m_move_origin = origin;
     m_move_window_origin = window.position();
-    m_move_window_cursor_position = window.is_tiled() || window.is_maximized() ? to_floating_cursor_position(m_mouse_down_origin) : m_mouse_down_origin;
+    m_move_window_cursor_position = window.is_tiled() ? to_floating_cursor_position(m_mouse_down_origin) : m_mouse_down_origin;
     m_geometry_overlay = Compositor::the().create_overlay<WindowGeometryOverlay>(window);
     m_geometry_overlay->set_enabled(true);
     window.invalidate(true, true);
@@ -741,7 +741,7 @@ bool WindowManager::process_ongoing_window_move(MouseEvent& event)
 
         dbgln_if(MOVE_DEBUG, "[WM] Finish moving Window({})", m_move_window);
 
-        if (!m_move_window->is_tiled() && !m_move_window->is_maximized())
+        if (!m_move_window->is_tiled())
             m_move_window->set_floating_rect(m_move_window->rect());
 
         m_move_window->invalidate(true, true);
@@ -787,22 +787,22 @@ bool WindowManager::process_ongoing_window_move(MouseEvent& event)
             auto event_location_relative_to_screen = event.position().translated(-cursor_screen.rect().location());
             if (is_resizable && event_location_relative_to_screen.x() <= tiling_deadzone) {
                 if (event_location_relative_to_screen.y() <= tiling_deadzone + desktop_relative_to_screen.top())
-                    m_move_window->set_tiled(&cursor_screen, WindowTileType::TopLeft);
+                    m_move_window->set_tiled(WindowTileType::TopLeft);
                 else if (event_location_relative_to_screen.y() >= desktop_relative_to_screen.height() - tiling_deadzone)
-                    m_move_window->set_tiled(&cursor_screen, WindowTileType::BottomLeft);
+                    m_move_window->set_tiled(WindowTileType::BottomLeft);
                 else
-                    m_move_window->set_tiled(&cursor_screen, WindowTileType::Left);
+                    m_move_window->set_tiled(WindowTileType::Left);
             } else if (is_resizable && event_location_relative_to_screen.x() >= cursor_screen.width() - tiling_deadzone) {
                 if (event_location_relative_to_screen.y() <= tiling_deadzone + desktop.top())
-                    m_move_window->set_tiled(&cursor_screen, WindowTileType::TopRight);
+                    m_move_window->set_tiled(WindowTileType::TopRight);
                 else if (event_location_relative_to_screen.y() >= desktop_relative_to_screen.height() - tiling_deadzone)
-                    m_move_window->set_tiled(&cursor_screen, WindowTileType::BottomRight);
+                    m_move_window->set_tiled(WindowTileType::BottomRight);
                 else
-                    m_move_window->set_tiled(&cursor_screen, WindowTileType::Right);
+                    m_move_window->set_tiled(WindowTileType::Right);
             } else if (is_resizable && event_location_relative_to_screen.y() <= secondary_deadzone + desktop_relative_to_screen.top()) {
-                m_move_window->set_tiled(&cursor_screen, WindowTileType::Top);
+                m_move_window->set_tiled(WindowTileType::Top);
             } else if (is_resizable && event_location_relative_to_screen.y() >= desktop_relative_to_screen.bottom() - secondary_deadzone) {
-                m_move_window->set_tiled(&cursor_screen, WindowTileType::Bottom);
+                m_move_window->set_tiled(WindowTileType::Bottom);
             } else if (!m_move_window->is_tiled()) {
                 Gfx::IntPoint pos = m_move_window_origin.translated(event.position() - m_move_origin);
                 m_move_window->set_position_without_repaint(pos);
@@ -864,7 +864,7 @@ bool WindowManager::process_ongoing_window_resize(MouseEvent const& event)
             auto desktop_rect = this->desktop_rect(cursor_screen);
             if (event.y() >= desktop_rect.bottom() - vertical_maximize_deadzone + 1 || event.y() <= desktop_rect.top() + vertical_maximize_deadzone - 1) {
                 dbgln_if(RESIZE_DEBUG, "Should tile as VerticallyMaximized");
-                m_resize_window->set_tiled(&cursor_screen, WindowTileType::VerticallyMaximized);
+                m_resize_window->set_tiled(WindowTileType::VerticallyMaximized);
                 m_resize_window = nullptr;
                 m_geometry_overlay = nullptr;
                 m_resizing_mouse_button = MouseButton::None;
@@ -876,7 +876,7 @@ bool WindowManager::process_ongoing_window_resize(MouseEvent const& event)
     if (event.type() == Event::MouseUp && event.button() == m_resizing_mouse_button) {
         dbgln_if(RESIZE_DEBUG, "[WM] Finish resizing Window({})", m_resize_window);
 
-        if (!m_resize_window->is_tiled() && !m_resize_window->is_maximized())
+        if (!m_resize_window->is_tiled())
             m_resize_window->set_floating_rect(m_resize_window->rect());
 
         Core::EventLoop::current().post_event(*m_resize_window, make<ResizeEvent>(m_resize_window->rect()));
@@ -1692,7 +1692,7 @@ void WindowManager::process_key_event(KeyEvent& event)
                 }
                 if (active_input_window->is_maximized())
                     maximize_windows(*active_input_window, false);
-                active_input_window->set_tiled(nullptr, WindowTileType::Left);
+                active_input_window->set_tiled(WindowTileType::Left);
                 return;
             }
             if (event.key() == Key_Right) {
@@ -1702,7 +1702,7 @@ void WindowManager::process_key_event(KeyEvent& event)
                 }
                 if (active_input_window->is_maximized())
                     maximize_windows(*active_input_window, false);
-                active_input_window->set_tiled(nullptr, WindowTileType::Right);
+                active_input_window->set_tiled(WindowTileType::Right);
                 return;
             }
         }
@@ -1717,7 +1717,7 @@ void WindowManager::process_key_event(KeyEvent& event)
                 }
                 if (active_input_window->is_maximized())
                     maximize_windows(*active_input_window, false);
-                active_input_window->set_tiled(nullptr, WindowTileType::HorizontallyMaximized);
+                active_input_window->set_tiled(WindowTileType::HorizontallyMaximized);
                 return;
             }
             if (event.key() == Key_Up || event.key() == Key_Down) {
@@ -1727,7 +1727,7 @@ void WindowManager::process_key_event(KeyEvent& event)
                 }
                 if (active_input_window->is_maximized())
                     maximize_windows(*active_input_window, false);
-                active_input_window->set_tiled(nullptr, WindowTileType::VerticallyMaximized);
+                active_input_window->set_tiled(WindowTileType::VerticallyMaximized);
                 return;
             }
         }
@@ -1960,15 +1960,13 @@ ResizeDirection WindowManager::resize_direction_of_window(Window const& window)
     return m_resize_direction;
 }
 
-Gfx::IntRect WindowManager::maximized_window_rect(Window const& window, bool relative_to_window_screen) const
+Gfx::IntRect WindowManager::tiled_window_rect(Window const& window, WindowTileType tile_type, bool relative_to_window_screen) const
 {
+    VERIFY(tile_type != WindowTileType::None);
+
     auto& screen = Screen::closest_to_rect(window.frame().rect());
     Gfx::IntRect rect = screen.rect();
 
-    // Subtract window title bar (leaving the border)
-    rect.set_y(rect.y() + window.frame().titlebar_rect().height() + window.frame().menubar_rect().height());
-    rect.set_height(rect.height() - window.frame().titlebar_rect().height() - window.frame().menubar_rect().height());
-
     if (screen.is_main_screen()) {
         // Subtract taskbar window height if present
         const_cast<WindowManager*>(this)->current_window_stack().for_each_visible_window_of_type_from_back_to_front(WindowType::Taskbar, [&rect](Window& taskbar_window) {
@@ -1977,9 +1975,56 @@ Gfx::IntRect WindowManager::maximized_window_rect(Window const& window, bool rel
         });
     }
 
-    constexpr int tasteful_space_above_maximized_window = 1;
-    rect.set_y(rect.y() + tasteful_space_above_maximized_window);
-    rect.set_height(rect.height() - tasteful_space_above_maximized_window);
+    if (tile_type == WindowTileType::Maximized) {
+        auto border_thickness = palette().window_border_thickness();
+        rect.inflate(border_thickness * 2, border_thickness * 2);
+    }
+
+    if (tile_type == WindowTileType::Left
+        || tile_type == WindowTileType::TopLeft
+        || tile_type == WindowTileType::BottomLeft) {
+        rect.set_width(rect.width() / 2);
+    }
+
+    if (tile_type == WindowTileType::Right
+        || tile_type == WindowTileType::TopRight
+        || tile_type == WindowTileType::BottomRight) {
+        rect.set_width(rect.width() / 2);
+        rect.set_x(rect.width());
+    }
+
+    if (tile_type == WindowTileType::Top
+        || tile_type == WindowTileType::TopLeft
+        || tile_type == WindowTileType::TopRight) {
+        rect.set_height(rect.height() / 2);
+    }
+
+    if (tile_type == WindowTileType::Bottom
+        || tile_type == WindowTileType::BottomLeft
+        || tile_type == WindowTileType::BottomRight) {
+        auto half_screen_reminder = rect.height() % 2;
+        rect.set_height(rect.height() / 2 + half_screen_reminder);
+        rect.set_y(rect.height() - half_screen_reminder);
+    }
+
+    Gfx::IntRect window_rect = window.rect();
+    Gfx::IntRect window_frame_rect = window.frame().rect();
+
+    if (tile_type == WindowTileType::VerticallyMaximized) {
+        rect.set_x(window_rect.x());
+        rect.set_width(window_rect.width());
+    } else {
+        rect.set_x(rect.x() + window_rect.x() - window_frame_rect.x());
+        rect.set_width(rect.width() - window_frame_rect.width() + window_rect.width());
+    }
+
+    if (tile_type == WindowTileType::HorizontallyMaximized) {
+        rect.set_y(window_rect.y());
+        rect.set_height(window_rect.height());
+    } else {
+        rect.set_y(rect.y() + window_rect.y() - window_frame_rect.y());
+        rect.set_height(rect.height() - window_frame_rect.height() + window_rect.height());
+    }
 
     if (relative_to_window_screen)
         rect.translate_by(-screen.rect().location());
diff --git a/Userland/Services/WindowServer/WindowManager.h b/Userland/Services/WindowServer/WindowManager.h
index 3be36cbc59..1b9c4fb32c 100644
--- a/Userland/Services/WindowServer/WindowManager.h
+++ b/Userland/Services/WindowServer/WindowManager.h
@@ -88,7 +88,7 @@ public:
     void notify_progress_changed(Window&);
     void notify_modified_changed(Window&);
 
-    Gfx::IntRect maximized_window_rect(Window const&, bool relative_to_window_screen = false) const;
+    Gfx::IntRect tiled_window_rect(Window const&, WindowTileType tile_type = WindowTileType::Maximized, bool relative_to_window_screen = false) const;
 
     ClientConnection const* dnd_client() const { return m_dnd_client.ptr(); }
     Core::MimeData const& dnd_mime_data() const { return *m_dnd_mime_data; }