/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef _mozilla_widget_TaskbarTabPreview_h_
#define _mozilla_widget_TaskbarTabPreview_h_

#include "nsITaskbarTabPreview.h"
#include "TaskbarPreview.h"

namespace mozilla {
namespace widget {

class TaskbarTabPreview : public nsITaskbarTabPreview, public TaskbarPreview {
  virtual ~TaskbarTabPreview();

 public:
  TaskbarTabPreview(ITaskbarList4* aTaskbar,
                    nsITaskbarPreviewController* aController, HWND aHWND,
                    nsIDocShell* aShell);
  virtual nsresult Init() override;

  NS_DECL_ISUPPORTS
  NS_DECL_NSITASKBARTABPREVIEW
  NS_FORWARD_NSITASKBARPREVIEW(TaskbarPreview::)

 private:
  virtual nsresult ShowActive(bool active);
  virtual HWND& PreviewWindow();
  virtual LRESULT WndProc(UINT nMsg, WPARAM wParam, LPARAM lParam);
  static LRESULT CALLBACK GlobalWndProc(HWND hWnd, UINT nMsg, WPARAM wParam,
                                        LPARAM lParam);

  virtual nsresult UpdateTaskbarProperties();
  virtual nsresult Enable();
  virtual nsresult Disable();
  virtual void DetachFromNSWindow();

  // WindowHook procedure for hooking mWnd
  static bool MainWindowHook(void* aContext, HWND hWnd, UINT nMsg,
                             WPARAM wParam, LPARAM lParam, LRESULT* aResult);

  // Bug 520807 - we need to update the proxy window style based on the main
  // window's style to workaround a bug with the way the DWM displays the
  // previews.
  void UpdateProxyWindowStyle();

  nsresult UpdateTitle();
  nsresult UpdateIcon();
  nsresult UpdateNext();

  // Handle to the toplevel proxy window
  HWND mProxyWindow;
  nsString mTitle;
  nsCOMPtr<imgIContainer> mIconImage;
  // Cached Windows icon of mIconImage
  HICON mIcon;
  // Preview that follows this preview in the taskbar (left-to-right order)
  nsCOMPtr<nsITaskbarTabPreview> mNext;
  // True if this preview has been registered with the taskbar
  bool mRegistered;
};

}  // namespace widget
}  // namespace mozilla

#endif /* _mozilla_widget_TaskbarTabPreview_h_ */