michael@0: /* vim: se cin sw=2 ts=2 et : */
michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef __mozilla_widget_TaskbarPreview_h__
michael@0: #define __mozilla_widget_TaskbarPreview_h__
michael@0: 
michael@0: #include <windows.h>
michael@0: #include <shobjidl.h>
michael@0: #undef LogSeverity // SetupAPI.h #defines this as DWORD
michael@0: 
michael@0: #include <nsITaskbarPreview.h>
michael@0: #include <nsAutoPtr.h>
michael@0: #include <nsString.h>
michael@0: #include <nsWeakPtr.h>
michael@0: #include <nsIDocShell.h>
michael@0: #include "WindowHook.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace widget {
michael@0: 
michael@0: class TaskbarPreview : public nsITaskbarPreview
michael@0: {
michael@0: public:
michael@0:   TaskbarPreview(ITaskbarList4 *aTaskbar, nsITaskbarPreviewController *aController, HWND aHWND, nsIDocShell *aShell);
michael@0:   virtual ~TaskbarPreview();
michael@0: 
michael@0:   NS_DECL_NSITASKBARPREVIEW
michael@0: 
michael@0: protected:
michael@0:   // Called to update ITaskbarList4 dependent properties
michael@0:   virtual nsresult UpdateTaskbarProperties();
michael@0: 
michael@0:   // Invoked when the preview is made visible
michael@0:   virtual nsresult Enable();
michael@0:   // Invoked when the preview is made invisible
michael@0:   virtual nsresult Disable();
michael@0: 
michael@0:   // Detaches this preview from the nsWindow instance it's tied to
michael@0:   virtual void DetachFromNSWindow();
michael@0: 
michael@0:   // Determines if the window is available and a destroy has not yet started
michael@0:   bool IsWindowAvailable() const;
michael@0: 
michael@0:   // Marks this preview as being active
michael@0:   virtual nsresult ShowActive(bool active) = 0;
michael@0:   // Gets a reference to the window used to handle the preview messages
michael@0:   virtual HWND& PreviewWindow() = 0;
michael@0: 
michael@0:   // Window procedure for the PreviewWindow (hooked for window previews)
michael@0:   virtual LRESULT WndProc(UINT nMsg, WPARAM wParam, LPARAM lParam);
michael@0: 
michael@0:   // Returns whether or not the taskbar icon has been created for mWnd The
michael@0:   // ITaskbarList4 API requires that we wait until the icon has been created
michael@0:   // before we can call its methods.
michael@0:   bool CanMakeTaskbarCalls();
michael@0: 
michael@0:   // Gets the WindowHook for the nsWindow
michael@0:   WindowHook &GetWindowHook();
michael@0: 
michael@0:   // Enables/disables custom drawing for the given window
michael@0:   static void EnableCustomDrawing(HWND aHWND, bool aEnable);
michael@0: 
michael@0:   // MSCOM Taskbar interface
michael@0:   nsRefPtr<ITaskbarList4> mTaskbar;
michael@0:   // Controller for this preview
michael@0:   nsCOMPtr<nsITaskbarPreviewController> mController;
michael@0:   // The HWND to the nsWindow that this object previews
michael@0:   HWND                    mWnd;
michael@0:   // Whether or not this preview is visible
michael@0:   bool                    mVisible;
michael@0: 
michael@0: private:
michael@0:   // Called when the tooltip should be updated
michael@0:   nsresult UpdateTooltip();
michael@0: 
michael@0:   // Requests the controller to draw into a canvas of the given width and
michael@0:   // height. The resulting bitmap is sent to the DWM to display.
michael@0:   void DrawBitmap(uint32_t width, uint32_t height, bool isPreview);
michael@0: 
michael@0:   // WindowHook procedure for hooking mWnd
michael@0:   static bool MainWindowHook(void *aContext,
michael@0:                                HWND hWnd, UINT nMsg,
michael@0:                                WPARAM wParam, LPARAM lParam,
michael@0:                                LRESULT *aResult);
michael@0: 
michael@0:   // Docshell corresponding to the <window> the nsWindow contains
michael@0:   nsWeakPtr               mDocShell;
michael@0:   nsString                mTooltip;
michael@0: 
michael@0:   // The preview currently marked as active in the taskbar. nullptr if no
michael@0:   // preview is active (some other window is).
michael@0:   static TaskbarPreview  *sActivePreview;
michael@0: };
michael@0: 
michael@0: } // namespace widget
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif /* __mozilla_widget_TaskbarPreview_h__ */
michael@0: