gecko/widget/windows/TaskbarPreview.h

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4.8 KiB
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/* vim: se cin sw=2 ts=2 et : */
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2009
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Rob Arnold <tellrob@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef __mozilla_widget_TaskbarPreview_h__
#define __mozilla_widget_TaskbarPreview_h__
#include <windows.h>
#include <shobjidl.h>
#include <nsITaskbarPreview.h>
#include <nsAutoPtr.h>
#include <nsString.h>
#include <nsWeakPtr.h>
#include <nsIDocShell.h>
#include "WindowHook.h"
namespace mozilla {
namespace widget {
class TaskbarPreview : public nsITaskbarPreview
{
public:
TaskbarPreview(ITaskbarList4 *aTaskbar, nsITaskbarPreviewController *aController, HWND aHWND, nsIDocShell *aShell);
virtual ~TaskbarPreview();
NS_DECL_NSITASKBARPREVIEW
protected:
// Called to update ITaskbarList4 dependent properties
virtual nsresult UpdateTaskbarProperties();
// Invoked when the preview is made visible
virtual nsresult Enable();
// Invoked when the preview is made invisible
virtual nsresult Disable();
// Detaches this preview from the nsWindow instance it's tied to
virtual void DetachFromNSWindow();
// Determines if the window is available and a destroy has not yet started
bool IsWindowAvailable() const;
// Marks this preview as being active
virtual nsresult ShowActive(bool active) = 0;
// Gets a reference to the window used to handle the preview messages
virtual HWND& PreviewWindow() = 0;
// Window procedure for the PreviewWindow (hooked for window previews)
virtual LRESULT WndProc(UINT nMsg, WPARAM wParam, LPARAM lParam);
// Returns whether or not the taskbar icon has been created for mWnd The
// ITaskbarList4 API requires that we wait until the icon has been created
// before we can call its methods.
bool CanMakeTaskbarCalls();
// Gets the WindowHook for the nsWindow
WindowHook &GetWindowHook();
// Enables/disables custom drawing for the given window
static void EnableCustomDrawing(HWND aHWND, bool aEnable);
// MSCOM Taskbar interface
nsRefPtr<ITaskbarList4> mTaskbar;
// Controller for this preview
nsCOMPtr<nsITaskbarPreviewController> mController;
// The HWND to the nsWindow that this object previews
HWND mWnd;
// Whether or not this preview is visible
bool mVisible;
private:
// Called when the tooltip should be updated
nsresult UpdateTooltip();
// Requests the controller to draw into a canvas of the given width and
// height. The resulting bitmap is sent to the DWM to display.
void DrawBitmap(PRUint32 width, PRUint32 height, bool isPreview);
// WindowHook procedure for hooking mWnd
static bool MainWindowHook(void *aContext,
HWND hWnd, UINT nMsg,
WPARAM wParam, LPARAM lParam,
LRESULT *aResult);
// Docshell corresponding to the <window> the nsWindow contains
nsWeakPtr mDocShell;
nsString mTooltip;
// The preview currently marked as active in the taskbar. nsnull if no
// preview is active (some other window is).
static TaskbarPreview *sActivePreview;
};
} // namespace widget
} // namespace mozilla
#endif /* __mozilla_widget_TaskbarPreview_h__ */