diff -r 000000000000 -r 6474c204b198 widget/windows/TaskbarWindowPreview.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/windows/TaskbarWindowPreview.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,84 @@
+/* vim: se cin sw=2 ts=2 et : */
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * 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_TaskbarWindowPreview_h__
+#define __mozilla_widget_TaskbarWindowPreview_h__
+
+#include "nsITaskbarWindowPreview.h"
+#include "nsITaskbarProgress.h"
+#include "nsITaskbarOverlayIconController.h"
+#include "TaskbarPreview.h"
+#include <nsWeakReference.h>
+
+namespace mozilla {
+namespace widget {
+
+class TaskbarPreviewButton;
+class TaskbarWindowPreview : public TaskbarPreview,
+                             public nsITaskbarWindowPreview,
+                             public nsITaskbarProgress,
+                             public nsITaskbarOverlayIconController,
+                             public nsSupportsWeakReference
+{
+public:
+  TaskbarWindowPreview(ITaskbarList4 *aTaskbar, nsITaskbarPreviewController *aController, HWND aHWND, nsIDocShell *aShell);
+  virtual ~TaskbarWindowPreview();
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSITASKBARWINDOWPREVIEW
+  NS_DECL_NSITASKBARPROGRESS
+  NS_DECL_NSITASKBAROVERLAYICONCONTROLLER
+  NS_FORWARD_NSITASKBARPREVIEW(TaskbarPreview::)
+
+  virtual LRESULT WndProc(UINT nMsg, WPARAM wParam, LPARAM lParam);
+private:
+  virtual nsresult ShowActive(bool active);
+  virtual HWND &PreviewWindow();
+
+  virtual nsresult UpdateTaskbarProperties();
+  virtual nsresult Enable();
+  virtual nsresult Disable();
+  virtual void DetachFromNSWindow();
+  nsresult UpdateButton(uint32_t index);
+  nsresult UpdateButtons();
+
+  // Is custom drawing enabled?
+  bool                    mCustomDrawing;
+  // Have we made any buttons?
+  bool                    mHaveButtons;
+  // Windows button format
+  THUMBBUTTON             mThumbButtons[nsITaskbarWindowPreview::NUM_TOOLBAR_BUTTONS];
+  // Pointers to our button class (cached instances)
+  nsWeakPtr               mWeakButtons[nsITaskbarWindowPreview::NUM_TOOLBAR_BUTTONS];
+
+  // Called to update ITaskbarList4 dependent properties
+  nsresult UpdateTaskbarProgress();
+  nsresult UpdateOverlayIcon();
+
+  // The taskbar progress
+  TBPFLAG                 mState;
+  ULONGLONG               mCurrentValue;
+  ULONGLONG               mMaxValue;
+
+  // Taskbar overlay icon
+  HICON                   mOverlayIcon;
+  nsString                mIconDescription;
+
+  // WindowHook procedure for hooking mWnd for taskbar progress and icon stuff
+  static bool TaskbarWindowHook(void *aContext,
+                                  HWND hWnd, UINT nMsg,
+                                  WPARAM wParam, LPARAM lParam,
+                                  LRESULT *aResult);
+
+  friend class TaskbarPreviewButton;
+};
+
+} // namespace widget
+} // namespace mozilla
+
+#endif /* __mozilla_widget_TaskbarWindowPreview_h__ */
+