Services: Move to Userland/Services/

1 files changed, 776 insertions, 0 deletions

diff --git a/Userland/Services/WindowServer/Window.cpp b/Userland/Services/WindowServer/Window.cpp
new file mode 100644
index 0000000000..1d0497c1c6
--- /dev/null
+++ b/Userland/Services/WindowServer/Window.cpp
@@ -0,0 +1,776 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "Window.h"
+#include "AppletManager.h"
+#include "ClientConnection.h"
+#include "Compositor.h"
+#include "Event.h"
+#include "EventLoop.h"
+#include "Screen.h"
+#include "WindowManager.h"
+#include <AK/Badge.h>
+#include <WindowServer/WindowClientEndpoint.h>
+
+namespace WindowServer {
+
+static String default_window_icon_path()
+{
+    return "/res/icons/16x16/window.png";
+}
+
+static Gfx::Bitmap& default_window_icon()
+{
+    static Gfx::Bitmap* s_icon;
+    if (!s_icon)
+        s_icon = Gfx::Bitmap::load_from_file(default_window_icon_path()).leak_ref();
+    return *s_icon;
+}
+
+static Gfx::Bitmap& minimize_icon()
+{
+    static Gfx::Bitmap* s_icon;
+    if (!s_icon)
+        s_icon = Gfx::Bitmap::load_from_file("/res/icons/16x16/downward-triangle.png").leak_ref();
+    return *s_icon;
+}
+
+static Gfx::Bitmap& maximize_icon()
+{
+    static Gfx::Bitmap* s_icon;
+    if (!s_icon)
+        s_icon = Gfx::Bitmap::load_from_file("/res/icons/16x16/upward-triangle.png").leak_ref();
+    return *s_icon;
+}
+
+static Gfx::Bitmap& restore_icon()
+{
+    static Gfx::Bitmap* s_icon;
+    if (!s_icon)
+        s_icon = Gfx::Bitmap::load_from_file("/res/icons/16x16/window-restore.png").leak_ref();
+    return *s_icon;
+}
+
+static Gfx::Bitmap& close_icon()
+{
+    static Gfx::Bitmap* s_icon;
+    if (!s_icon)
+        s_icon = Gfx::Bitmap::load_from_file("/res/icons/16x16/window-close.png").leak_ref();
+    return *s_icon;
+}
+
+Window::Window(Core::Object& parent, WindowType type)
+    : Core::Object(&parent)
+    , m_type(type)
+    , m_icon(default_window_icon())
+    , m_frame(*this)
+{
+    WindowManager::the().add_window(*this);
+}
+
+Window::Window(ClientConnection& client, WindowType window_type, int window_id, bool modal, bool minimizable, bool frameless, bool resizable, bool fullscreen, bool accessory, Window* parent_window)
+    : Core::Object(&client)
+    , m_client(&client)
+    , m_type(window_type)
+    , m_modal(modal)
+    , m_minimizable(minimizable)
+    , m_frameless(frameless)
+    , m_resizable(resizable)
+    , m_fullscreen(fullscreen)
+    , m_accessory(accessory)
+    , m_window_id(window_id)
+    , m_client_id(client.client_id())
+    , m_icon(default_window_icon())
+    , m_frame(*this)
+{
+    // FIXME: This should not be hard-coded here.
+    if (m_type == WindowType::Taskbar) {
+        m_wm_event_mask = WMEventMask::WindowStateChanges | WMEventMask::WindowRemovals | WMEventMask::WindowIconChanges;
+        m_listens_to_wm_events = true;
+    }
+
+    if (parent_window)
+        set_parent_window(*parent_window);
+    WindowManager::the().add_window(*this);
+}
+
+Window::~Window()
+{
+    // Detach from client at the start of teardown since we don't want
+    // to confuse things by trying to send messages to it.
+    m_client = nullptr;
+
+    WindowManager::the().remove_window(*this);
+}
+
+void Window::destroy()
+{
+    m_destroyed = true;
+    set_visible(false);
+}
+
+void Window::set_title(const String& title)
+{
+    if (m_title == title)
+        return;
+    m_title = title;
+    frame().invalidate_title_bar();
+    WindowManager::the().notify_title_changed(*this);
+}
+
+void Window::set_rect(const Gfx::IntRect& rect)
+{
+    ASSERT(!rect.is_empty());
+    if (m_rect == rect)
+        return;
+    auto old_rect = m_rect;
+    m_rect = rect;
+    if (!m_client && (!m_backing_store || old_rect.size() != rect.size())) {
+        m_backing_store = Gfx::Bitmap::create(Gfx::BitmapFormat::RGB32, m_rect.size());
+    }
+
+    invalidate(true);
+    m_frame.notify_window_rect_changed(old_rect, rect); // recomputes occlusions
+}
+
+void Window::set_rect_without_repaint(const Gfx::IntRect& rect)
+{
+    ASSERT(!rect.is_empty());
+    if (m_rect == rect)
+        return;
+    auto old_rect = m_rect;
+    m_rect = rect;
+
+    if (old_rect.size() == m_rect.size()) {
+        auto delta = m_rect.location() - old_rect.location();
+        for (auto& child_window : m_child_windows) {
+            if (child_window)
+                child_window->move_by(delta);
+        }
+    }
+
+    invalidate(true);
+    m_frame.notify_window_rect_changed(old_rect, rect); // recomputes occlusions
+}
+
+void Window::handle_mouse_event(const MouseEvent& event)
+{
+    set_automatic_cursor_tracking_enabled(event.buttons() != 0);
+
+    switch (event.type()) {
+    case Event::MouseMove:
+        m_client->post_message(Messages::WindowClient::MouseMove(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta(), event.is_drag(), event.mime_types()));
+        break;
+    case Event::MouseDown:
+        m_client->post_message(Messages::WindowClient::MouseDown(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta()));
+        break;
+    case Event::MouseDoubleClick:
+        m_client->post_message(Messages::WindowClient::MouseDoubleClick(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta()));
+        break;
+    case Event::MouseUp:
+        m_client->post_message(Messages::WindowClient::MouseUp(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta()));
+        break;
+    case Event::MouseWheel:
+        m_client->post_message(Messages::WindowClient::MouseWheel(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta()));
+        break;
+    default:
+        ASSERT_NOT_REACHED();
+    }
+}
+
+void Window::update_menu_item_text(PopupMenuItem item)
+{
+    if (m_window_menu) {
+        m_window_menu->item((int)item).set_text(item == PopupMenuItem::Minimize ? (m_minimized ? "Unminimize" : "Minimize") : (m_maximized ? "Restore" : "Maximize"));
+        m_window_menu->redraw();
+    }
+}
+
+void Window::update_menu_item_enabled(PopupMenuItem item)
+{
+    if (m_window_menu) {
+        m_window_menu->item((int)item).set_enabled(item == PopupMenuItem::Minimize ? m_minimizable : m_resizable);
+        m_window_menu->redraw();
+    }
+}
+
+void Window::set_minimized(bool minimized)
+{
+    if (m_minimized == minimized)
+        return;
+    if (minimized && !m_minimizable)
+        return;
+    m_minimized = minimized;
+    update_menu_item_text(PopupMenuItem::Minimize);
+    Compositor::the().invalidate_occlusions();
+    Compositor::the().invalidate_screen(frame().rect());
+    if (!blocking_modal_window())
+        start_minimize_animation();
+    if (!minimized)
+        request_update({ {}, size() });
+    WindowManager::the().notify_minimization_state_changed(*this);
+}
+
+void Window::set_minimizable(bool minimizable)
+{
+    if (m_minimizable == minimizable)
+        return;
+    m_minimizable = minimizable;
+    update_menu_item_enabled(PopupMenuItem::Minimize);
+    // TODO: Hide/show (or alternatively change enabled state of) window minimize button dynamically depending on value of m_minimizable
+}
+
+void Window::set_taskbar_rect(const Gfx::IntRect& rect)
+{
+    m_taskbar_rect = rect;
+    m_have_taskbar_rect = !m_taskbar_rect.is_empty();
+}
+
+void Window::start_minimize_animation()
+{
+    if (!m_have_taskbar_rect) {
+        // If this is a modal window, it may not have its own taskbar
+        // button, so there is no rectangle. In that case, walk the
+        // modal stack until we find a window that may have one
+        WindowManager::the().for_each_window_in_modal_stack(*this, [&](Window& w, bool) {
+            if (w.has_taskbar_rect()) {
+                // We purposely do NOT set m_have_taskbar_rect to true here
+                // because we want to only copy the rectangle from the
+                // window that has it, but since this window wouldn't receive
+                // any updates down the road we want to query it again
+                // next time we want to start the animation
+                m_taskbar_rect = w.taskbar_rect();
+
+                ASSERT(!m_have_taskbar_rect); // should remain unset!
+                return IterationDecision::Break;
+            };
+            return IterationDecision::Continue;
+        });
+    }
+    m_minimize_animation_step = 0;
+}
+
+void Window::set_opacity(float opacity)
+{
+    if (m_opacity == opacity)
+        return;
+    bool was_opaque = is_opaque();
+    m_opacity = opacity;
+    if (was_opaque != is_opaque())
+        Compositor::the().invalidate_occlusions();
+    Compositor::the().invalidate_screen(frame().rect());
+    WindowManager::the().notify_opacity_changed(*this);
+}
+
+void Window::set_occluded(bool occluded)
+{
+    if (m_occluded == occluded)
+        return;
+    m_occluded = occluded;
+    WindowManager::the().notify_occlusion_state_changed(*this);
+}
+
+void Window::set_maximized(bool maximized)
+{
+    if (m_maximized == maximized)
+        return;
+    if (maximized && (!is_resizable() || resize_aspect_ratio().has_value()))
+        return;
+    set_tiled(WindowTileType::None);
+    m_maximized = maximized;
+    update_menu_item_text(PopupMenuItem::Maximize);
+    if (maximized) {
+        m_unmaximized_rect = m_rect;
+        set_rect(WindowManager::the().maximized_window_rect(*this));
+    } else {
+        set_rect(m_unmaximized_rect);
+    }
+    m_frame.did_set_maximized({}, maximized);
+    Core::EventLoop::current().post_event(*this, make<ResizeEvent>(m_rect));
+    set_default_positioned(false);
+}
+
+void Window::set_resizable(bool resizable)
+{
+    if (m_resizable == resizable)
+        return;
+    m_resizable = resizable;
+    update_menu_item_enabled(PopupMenuItem::Maximize);
+    // TODO: Hide/show (or alternatively change enabled state of) window maximize button dynamically depending on value of is_resizable()
+}
+
+void Window::event(Core::Event& event)
+{
+    if (!m_client) {
+        ASSERT(parent());
+        event.ignore();
+        return;
+    }
+
+    if (blocking_modal_window()) {
+        // We still want to handle the WindowDeactivated event below when a new modal is
+        // created to notify its parent window, despite it being "blocked by modal window".
+        if (event.type() != Event::WindowDeactivated)
+            return;
+    }
+
+    if (static_cast<Event&>(event).is_mouse_event())
+        return handle_mouse_event(static_cast<const MouseEvent&>(event));
+
+    switch (event.type()) {
+    case Event::WindowEntered:
+        m_client->post_message(Messages::WindowClient::WindowEntered(m_window_id));
+        break;
+    case Event::WindowLeft:
+        m_client->post_message(Messages::WindowClient::WindowLeft(m_window_id));
+        break;
+    case Event::KeyDown:
+        m_client->post_message(
+            Messages::WindowClient::KeyDown(m_window_id,
+                (u32) static_cast<const KeyEvent&>(event).code_point(),
+                (u32) static_cast<const KeyEvent&>(event).key(),
+                static_cast<const KeyEvent&>(event).modifiers(),
+                (u32) static_cast<const KeyEvent&>(event).scancode()));
+        break;
+    case Event::KeyUp:
+        m_client->post_message(
+            Messages::WindowClient::KeyUp(m_window_id,
+                (u32) static_cast<const KeyEvent&>(event).code_point(),
+                (u32) static_cast<const KeyEvent&>(event).key(),
+                static_cast<const KeyEvent&>(event).modifiers(),
+                (u32) static_cast<const KeyEvent&>(event).scancode()));
+        break;
+    case Event::WindowActivated:
+        m_client->post_message(Messages::WindowClient::WindowActivated(m_window_id));
+        break;
+    case Event::WindowDeactivated:
+        m_client->post_message(Messages::WindowClient::WindowDeactivated(m_window_id));
+        break;
+    case Event::WindowInputEntered:
+        m_client->post_message(Messages::WindowClient::WindowInputEntered(m_window_id));
+        break;
+    case Event::WindowInputLeft:
+        m_client->post_message(Messages::WindowClient::WindowInputLeft(m_window_id));
+        break;
+    case Event::WindowCloseRequest:
+        m_client->post_message(Messages::WindowClient::WindowCloseRequest(m_window_id));
+        break;
+    case Event::WindowResized:
+        m_client->post_message(Messages::WindowClient::WindowResized(m_window_id, static_cast<const ResizeEvent&>(event).rect()));
+        break;
+    default:
+        break;
+    }
+}
+
+void Window::set_global_cursor_tracking_enabled(bool enabled)
+{
+    m_global_cursor_tracking_enabled = enabled;
+}
+
+void Window::set_visible(bool b)
+{
+    if (m_visible == b)
+        return;
+    m_visible = b;
+
+    Compositor::the().invalidate_occlusions();
+    if (m_visible)
+        invalidate(true);
+    else
+        Compositor::the().invalidate_screen(frame().rect());
+}
+
+void Window::invalidate(bool invalidate_frame)
+{
+    m_invalidated = true;
+    m_invalidated_all = true;
+    m_invalidated_frame |= invalidate_frame;
+    m_dirty_rects.clear();
+    Compositor::the().invalidate_window();
+}
+
+void Window::invalidate(const Gfx::IntRect& rect, bool with_frame)
+{
+    if (type() == WindowType::MenuApplet) {
+        AppletManager::the().invalidate_applet(*this, rect);
+        return;
+    }
+
+    if (invalidate_no_notify(rect, with_frame))
+        Compositor::the().invalidate_window();
+}
+
+bool Window::invalidate_no_notify(const Gfx::IntRect& rect, bool with_frame)
+{
+    if (rect.is_empty())
+        return false;
+    if (m_invalidated_all) {
+        m_invalidated_frame |= with_frame;
+        return false;
+    }
+
+    auto outer_rect = frame().rect();
+    auto inner_rect = rect;
+    inner_rect.move_by(position());
+    // FIXME: This seems slightly wrong; the inner rect shouldn't intersect the border part of the outer rect.
+    inner_rect.intersect(outer_rect);
+    if (inner_rect.is_empty())
+        return false;
+
+    m_invalidated = true;
+    m_invalidated_frame |= with_frame;
+    m_dirty_rects.add(inner_rect.translated(-outer_rect.location()));
+    return true;
+}
+
+void Window::prepare_dirty_rects()
+{
+    if (m_invalidated_all) {
+        if (m_invalidated_frame)
+            m_dirty_rects = frame().rect();
+        else
+            m_dirty_rects = rect();
+    } else {
+        m_dirty_rects.move_by(frame().rect().location());
+    }
+}
+
+void Window::clear_dirty_rects()
+{
+    m_invalidated_all = false;
+    m_invalidated_frame = false;
+    m_invalidated = false;
+    m_dirty_rects.clear_with_capacity();
+}
+
+bool Window::is_active() const
+{
+    return WindowManager::the().active_window() == this;
+}
+
+Window* Window::blocking_modal_window()
+{
+    // A window is blocked if any immediate child, or any child further
+    // down the chain is modal
+    for (auto& window : m_child_windows) {
+        if (window && !window->is_destroyed()) {
+            if (window->is_modal())
+                return window;
+
+            if (auto* blocking_window = window->blocking_modal_window())
+                return blocking_window;
+        }
+    }
+    return nullptr;
+}
+
+void Window::set_default_icon()
+{
+    m_icon = default_window_icon();
+}
+
+void Window::request_update(const Gfx::IntRect& rect, bool ignore_occlusion)
+{
+    if (rect.is_empty())
+        return;
+    if (m_pending_paint_rects.is_empty()) {
+        deferred_invoke([this, ignore_occlusion](auto&) {
+            client()->post_paint_message(*this, ignore_occlusion);
+        });
+    }
+    m_pending_paint_rects.add(rect);
+}
+
+void Window::ensure_window_menu()
+{
+    if (!m_window_menu) {
+        m_window_menu = Menu::construct(nullptr, -1, "(Window Menu)");
+        m_window_menu->set_window_menu_of(*this);
+
+        auto minimize_item = make<MenuItem>(*m_window_menu, 1, m_minimized ? "Unminimize" : "Minimize");
+        m_window_menu_minimize_item = minimize_item.ptr();
+        m_window_menu->add_item(move(minimize_item));
+
+        auto maximize_item = make<MenuItem>(*m_window_menu, 2, m_maximized ? "Restore" : "Maximize");
+        m_window_menu_maximize_item = maximize_item.ptr();
+        m_window_menu->add_item(move(maximize_item));
+
+        m_window_menu->add_item(make<MenuItem>(*m_window_menu, MenuItem::Type::Separator));
+
+        auto close_item = make<MenuItem>(*m_window_menu, 3, "Close");
+        m_window_menu_close_item = close_item.ptr();
+        m_window_menu_close_item->set_icon(&close_icon());
+        m_window_menu_close_item->set_default(true);
+        m_window_menu->add_item(move(close_item));
+
+        m_window_menu->item((int)PopupMenuItem::Minimize).set_enabled(m_minimizable);
+        m_window_menu->item((int)PopupMenuItem::Maximize).set_enabled(m_resizable);
+
+        m_window_menu->on_item_activation = [&](auto& item) {
+            switch (item.identifier()) {
+            case 1:
+                WindowManager::the().minimize_windows(*this, !m_minimized);
+                if (!m_minimized)
+                    WindowManager::the().move_to_front_and_make_active(*this);
+                break;
+            case 2:
+                WindowManager::the().maximize_windows(*this, !m_maximized);
+                WindowManager::the().move_to_front_and_make_active(*this);
+                break;
+            case 3:
+                request_close();
+                break;
+            }
+        };
+    }
+}
+
+void Window::popup_window_menu(const Gfx::IntPoint& position, WindowMenuDefaultAction default_action)
+{
+    ensure_window_menu();
+    if (default_action == WindowMenuDefaultAction::BasedOnWindowState) {
+        // When clicked on the task bar, determine the default action
+        if (!is_active() && !is_minimized())
+            default_action = WindowMenuDefaultAction::None;
+        else if (is_minimized())
+            default_action = WindowMenuDefaultAction::Unminimize;
+        else
+            default_action = WindowMenuDefaultAction::Minimize;
+    }
+    m_window_menu_minimize_item->set_default(default_action == WindowMenuDefaultAction::Minimize || default_action == WindowMenuDefaultAction::Unminimize);
+    m_window_menu_minimize_item->set_icon(m_minimized ? 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_close_item->set_default(default_action == WindowMenuDefaultAction::Close);
+
+    m_window_menu->popup(position);
+}
+
+void Window::window_menu_activate_default()
+{
+    ensure_window_menu();
+    m_window_menu->activate_default();
+}
+
+void Window::request_close()
+{
+    Event close_request(Event::WindowCloseRequest);
+    event(close_request);
+}
+
+void Window::set_fullscreen(bool fullscreen)
+{
+    if (m_fullscreen == fullscreen)
+        return;
+    m_fullscreen = fullscreen;
+    Gfx::IntRect new_window_rect = m_rect;
+    if (m_fullscreen) {
+        m_saved_nonfullscreen_rect = m_rect;
+        new_window_rect = Screen::the().rect();
+    } else if (!m_saved_nonfullscreen_rect.is_empty()) {
+        new_window_rect = m_saved_nonfullscreen_rect;
+    }
+
+    Core::EventLoop::current().post_event(*this, make<ResizeEvent>(new_window_rect));
+    set_rect(new_window_rect);
+}
+
+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,
+            menu_height,
+            Screen::the().width() / 2 - frame_width,
+            max_height);
+    case WindowTileType::Right:
+        return Gfx::IntRect(Screen::the().width() / 2 + frame_width,
+            menu_height,
+            Screen::the().width() / 2 - frame_width,
+            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();
+    }
+}
+
+void Window::set_tiled(WindowTileType tiled)
+{
+    if (m_tiled == tiled)
+        return;
+
+    if (resize_aspect_ratio().has_value())
+        return;
+
+    m_tiled = tiled;
+    if (tiled != WindowTileType::None)
+        m_untiled_rect = m_rect;
+    set_rect(tiled_rect(tiled));
+    Core::EventLoop::current().post_event(*this, make<ResizeEvent>(m_rect));
+}
+
+void Window::detach_client(Badge<ClientConnection>)
+{
+    m_client = nullptr;
+}
+
+void Window::recalculate_rect()
+{
+    if (!is_resizable())
+        return;
+
+    bool send_event = true;
+    if (m_tiled != WindowTileType::None) {
+        set_rect(tiled_rect(m_tiled));
+    } else if (is_maximized()) {
+        set_rect(WindowManager::the().maximized_window_rect(*this));
+    } else if (type() == WindowType::Desktop) {
+        set_rect(WindowManager::the().desktop_rect());
+    } else {
+        send_event = false;
+    }
+
+    if (send_event) {
+        Core::EventLoop::current().post_event(*this, make<ResizeEvent>(m_rect));
+    }
+}
+
+void Window::add_child_window(Window& child_window)
+{
+    m_child_windows.append(child_window);
+}
+
+void Window::add_accessory_window(Window& accessory_window)
+{
+    m_accessory_windows.append(accessory_window);
+}
+
+void Window::set_parent_window(Window& parent_window)
+{
+    ASSERT(!m_parent_window);
+    m_parent_window = parent_window;
+    if (m_accessory)
+        parent_window.add_accessory_window(*this);
+    else
+        parent_window.add_child_window(*this);
+}
+
+bool Window::is_accessory() const
+{
+    if (!m_accessory)
+        return false;
+    if (parent_window() != nullptr)
+        return true;
+
+    // If accessory window was unparented, convert to a regular window
+    const_cast<Window*>(this)->set_accessory(false);
+    return false;
+}
+
+bool Window::is_accessory_of(Window& window) const
+{
+    if (!is_accessory())
+        return false;
+    return parent_window() == &window;
+}
+
+void Window::modal_unparented()
+{
+    m_modal = false;
+    WindowManager::the().notify_modal_unparented(*this);
+}
+
+bool Window::is_modal() const
+{
+    if (!m_modal)
+        return false;
+    if (!m_parent_window) {
+        const_cast<Window*>(this)->modal_unparented();
+        return false;
+    }
+    return true;
+}
+
+void Window::set_progress(int progress)
+{
+    if (m_progress == progress)
+        return;
+
+    m_progress = progress;
+    WindowManager::the().notify_progress_changed(*this);
+}
+
+bool Window::is_descendant_of(Window& window) const
+{
+    for (auto* parent = parent_window(); parent; parent = parent->parent_window()) {
+        if (parent == &window)
+            return true;
+        for (auto& accessory : parent->accessory_windows()) {
+            if (accessory == &window)
+                return true;
+        }
+    }
+    return false;
+}
+
+}