text: #include "WSWindow.h"
  #include "WSEvent.h"
  #include "WSEventLoop.h"
  #include "WSWindowManager.h"
  #include <WindowServer/WSAPITypes.h>
  #include <WindowServer/WSClientConnection.h>
  
  static String default_window_icon_path()
  {
      return "/res/icons/16x16/window.png";
  }
  
  static GraphicsBitmap& default_window_icon()
  {
      static GraphicsBitmap* s_icon;
      if (!s_icon)
          s_icon = GraphicsBitmap::load_from_file(default_window_icon_path()).leak_ref();
      return *s_icon;
  }
  
  WSWindow::WSWindow(CObject& internal_owner, WSWindowType type)
      : m_internal_owner(&internal_owner)
      , m_type(type)
      , m_icon(default_window_icon())
      , m_icon_path(default_window_icon_path())
      , m_frame(*this)
  {
      WSWindowManager::the().add_window(*this);
  }
  
  WSWindow::WSWindow(WSClientConnection& client, WSWindowType window_type, int window_id, bool modal, bool resizable, bool fullscreen)
      : m_client(&client)
      , m_type(window_type)
      , m_modal(modal)
      , m_resizable(resizable)
      , m_fullscreen(fullscreen)
      , m_window_id(window_id)
      , m_icon(default_window_icon())
      , m_icon_path(default_window_icon_path())
      , m_frame(*this)
  {
      // FIXME: This should not be hard-coded here.
      if (m_type == WSWindowType::Taskbar) {
          m_wm_event_mask = WSAPI_WMEventMask::WindowStateChanges | WSAPI_WMEventMask::WindowRemovals | WSAPI_WMEventMask::WindowIconChanges;
          m_listens_to_wm_events = true;
      }
      WSWindowManager::the().add_window(*this);
  }
  
  WSWindow::~WSWindow()
  {
      WSWindowManager::the().remove_window(*this);
  }
  
  void WSWindow::set_title(const String& title)
  {
      if (m_title == title)
          return;
      m_title = title;
      WSWindowManager::the().notify_title_changed(*this);
  }
  
  void WSWindow::set_rect(const Rect& rect)
  {
      Rect old_rect;
      if (m_rect == rect)
          return;
      old_rect = m_rect;
      m_rect = rect;
      if (!m_client && (!m_backing_store || old_rect.size() != rect.size())) {
          m_backing_store = GraphicsBitmap::create(GraphicsBitmap::Format::RGB32, m_rect.size());
      }
      m_frame.notify_window_rect_changed(old_rect, rect);
  }
  
  // FIXME: Just use the same types.
  static WSAPI_MouseButton to_api(MouseButton button)
  {
      switch (button) {
      case MouseButton::None:
          return WSAPI_MouseButton::NoButton;
      case MouseButton::Left:
          return WSAPI_MouseButton::Left;
      case MouseButton::Right:
          return WSAPI_MouseButton::Right;
      case MouseButton::Middle:
          return WSAPI_MouseButton::Middle;
      }
      ASSERT_NOT_REACHED();
  }
  
  void WSWindow::handle_mouse_event(const WSMouseEvent& event)
  {
      set_automatic_cursor_tracking_enabled(event.buttons() != 0);
  
      WSAPI_ServerMessage server_message;
      server_message.window_id = window_id();
  
      switch (event.type()) {
      case WSEvent::MouseMove:
          server_message.type = WSAPI_ServerMessage::Type::MouseMove;
          break;
      case WSEvent::MouseDown:
          server_message.type = WSAPI_ServerMessage::Type::MouseDown;
          break;
      case WSEvent::MouseDoubleClick:
          server_message.type = WSAPI_ServerMessage::Type::MouseDoubleClick;
          break;
      case WSEvent::MouseUp:
          server_message.type = WSAPI_ServerMessage::Type::MouseUp;
          break;
      case WSEvent::MouseWheel:
          server_message.type = WSAPI_ServerMessage::Type::MouseWheel;
          break;
      default:
          ASSERT_NOT_REACHED();
      }
  
      server_message.mouse.position = event.position();
      server_message.mouse.button = to_api(event.button());
      server_message.mouse.buttons = event.buttons();
      server_message.mouse.modifiers = event.modifiers();
      server_message.mouse.wheel_delta = event.wheel_delta();
  
      m_client->post_message(server_message);
  }
  
  static WSAPI_WindowType to_api(WSWindowType ws_type)
  {
      switch (ws_type) {
      case WSWindowType::Normal:
          return WSAPI_WindowType::Normal;
      case WSWindowType::Menu:
          return WSAPI_WindowType::Menu;
      case WSWindowType::WindowSwitcher:
          return WSAPI_WindowType::WindowSwitcher;
      case WSWindowType::Taskbar:
          return WSAPI_WindowType::Taskbar;
      case WSWindowType::Tooltip:
          return WSAPI_WindowType::Tooltip;
      default:
          ASSERT_NOT_REACHED();
      }
  }
  
  void WSWindow::set_minimized(bool minimized)
  {
      if (m_minimized == minimized)
          return;
      m_minimized = minimized;
      if (!minimized)
          request_update({ {}, size() });
      invalidate();
      WSWindowManager::the().notify_minimization_state_changed(*this);
  }
  
  void WSWindow::set_maximized(bool maximized)
  {
      if (m_maximized == maximized)
          return;
      m_maximized = maximized;
      auto old_rect = m_rect;
      if (maximized) {
          m_unmaximized_rect = m_rect;
          set_rect(WSWindowManager::the().maximized_window_rect(*this));
      } else {
          set_rect(m_unmaximized_rect);
      }
      m_frame.did_set_maximized({}, maximized);
      WSEventLoop::the().post_event(*this, make<WSResizeEvent>(old_rect, m_rect));
  }
  
  void WSWindow::event(CEvent& event)
  {
      if (m_internal_owner)
          return m_internal_owner->event(event);
  
      if (is_blocked_by_modal_window())
          return;
  
      WSAPI_ServerMessage server_message;
      server_message.window_id = window_id();
  
      if (static_cast<WSEvent&>(event).is_mouse_event())
          return handle_mouse_event(static_cast<const WSMouseEvent&>(event));
  
      switch (event.type()) {
      case WSEvent::WindowEntered:
          server_message.type = WSAPI_ServerMessage::Type::WindowEntered;
          break;
      case WSEvent::WindowLeft:
          server_message.type = WSAPI_ServerMessage::Type::WindowLeft;
          break;
      case WSEvent::KeyDown:
          server_message.type = WSAPI_ServerMessage::Type::KeyDown;
          server_message.key.character = static_cast<const WSKeyEvent&>(event).character();
          server_message.key.key = static_cast<const WSKeyEvent&>(event).key();
          server_message.key.modifiers = static_cast<const WSKeyEvent&>(event).modifiers();
          break;
      case WSEvent::KeyUp:
          server_message.type = WSAPI_ServerMessage::Type::KeyUp;
          server_message.key.character = static_cast<const WSKeyEvent&>(event).character();
          server_message.key.key = static_cast<const WSKeyEvent&>(event).key();
          server_message.key.modifiers = static_cast<const WSKeyEvent&>(event).modifiers();
          break;
      case WSEvent::WindowActivated:
          server_message.type = WSAPI_ServerMessage::Type::WindowActivated;
          break;
      case WSEvent::WindowDeactivated:
          server_message.type = WSAPI_ServerMessage::Type::WindowDeactivated;
          break;
      case WSEvent::WindowCloseRequest:
          server_message.type = WSAPI_ServerMessage::Type::WindowCloseRequest;
          break;
      case WSEvent::WindowResized:
          server_message.type = WSAPI_ServerMessage::Type::WindowResized;
          server_message.window.old_rect = static_cast<const WSResizeEvent&>(event).old_rect();
          server_message.window.rect = static_cast<const WSResizeEvent&>(event).rect();
          break;
      case WSEvent::WM_WindowRemoved: {
          auto& removed_event = static_cast<const WSWMWindowRemovedEvent&>(event);
          server_message.type = WSAPI_ServerMessage::Type::WM_WindowRemoved;
          server_message.wm.client_id = removed_event.client_id();
          server_message.wm.window_id = removed_event.window_id();
          break;
      }
      case WSEvent::WM_WindowStateChanged: {
          auto& changed_event = static_cast<const WSWMWindowStateChangedEvent&>(event);
          server_message.type = WSAPI_ServerMessage::Type::WM_WindowStateChanged;
          server_message.wm.client_id = changed_event.client_id();
          server_message.wm.window_id = changed_event.window_id();
          server_message.wm.is_active = changed_event.is_active();
          server_message.wm.is_minimized = changed_event.is_minimized();
          server_message.wm.window_type = to_api(changed_event.window_type());
          ASSERT(changed_event.title().length() < sizeof(server_message.text));
          memcpy(server_message.text, changed_event.title().characters(), changed_event.title().length());
          server_message.text_length = changed_event.title().length();
          server_message.wm.rect = changed_event.rect();
          break;
      }
  
      case WSEvent::WM_WindowIconChanged: {
          auto& changed_event = static_cast<const WSWMWindowIconChangedEvent&>(event);
          server_message.type = WSAPI_ServerMessage::Type::WM_WindowIconChanged;
          server_message.wm.client_id = changed_event.client_id();
          server_message.wm.window_id = changed_event.window_id();
          ASSERT(changed_event.icon_path().length() < sizeof(server_message.text));
          memcpy(server_message.text, changed_event.icon_path().characters(), changed_event.icon_path().length());
          server_message.text_length = changed_event.icon_path().length();
          break;
      }
  
      case WSEvent::WM_WindowRectChanged: {
          auto& changed_event = static_cast<const WSWMWindowRectChangedEvent&>(event);
          server_message.type = WSAPI_ServerMessage::Type::WM_WindowRectChanged;
          server_message.wm.client_id = changed_event.client_id();
          server_message.wm.window_id = changed_event.window_id();
          server_message.wm.rect = changed_event.rect();
          break;
      }
  
      default:
          break;
      }
  
      if (server_message.type == WSAPI_ServerMessage::Type::Invalid)
          return;
  
      m_client->post_message(server_message);
  }
  
  void WSWindow::set_global_cursor_tracking_enabled(bool enabled)
  {
      m_global_cursor_tracking_enabled = enabled;
  }
  
  void WSWindow::set_visible(bool b)
  {
      if (m_visible == b)
          return;
      m_visible = b;
      invalidate();
  }
  
  void WSWindow::invalidate()
  {
      WSWindowManager::the().invalidate(*this);
  }
  
  bool WSWindow::is_active() const
  {
      return WSWindowManager::the().active_window() == this;
  }
  
  bool WSWindow::is_blocked_by_modal_window() const
  {
      return !is_modal() && client() && client()->is_showing_modal_window();
  }
  
  void WSWindow::set_default_icon()
  {
      m_icon = default_window_icon();
      m_icon_path = default_window_icon_path();
  }
  
  void WSWindow::request_update(const Rect& rect)
  {
      if (m_pending_paint_rects.is_empty()) {
          deferred_invoke([this](auto&) {
              client()->post_paint_message(*this);
          });
      }
      m_pending_paint_rects.add(rect);
  }
  