/* 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_TaskbarPreview_h__ #define __mozilla_widget_TaskbarPreview_h__ #include <windows.h> #include <shobjidl.h> #undef LogSeverity // SetupAPI.h #defines this as DWORD #include "mozilla/RefPtr.h" #include <nsITaskbarPreview.h> #include <nsITaskbarPreviewController.h> #include <nsString.h> #include <nsWeakPtr.h> #include <nsIDocShell.h> #include "WindowHook.h" namespace mozilla { namespace widget { class TaskbarPreviewCallback; class TaskbarPreview : public nsITaskbarPreview { public: TaskbarPreview(ITaskbarList4 *aTaskbar, nsITaskbarPreviewController *aController, HWND aHWND, nsIDocShell *aShell); friend class TaskbarPreviewCallback; NS_DECL_NSITASKBARPREVIEW protected: virtual ~TaskbarPreview(); // 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 RefPtr<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(uint32_t width, uint32_t 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. nullptr if no // preview is active (some other window is). static TaskbarPreview *sActivePreview; }; /* * Callback object TaskbarPreview hands to preview controllers when we * request async thumbnail or live preview images. Controllers invoke * this interface once they have aquired the requested image. */ class TaskbarPreviewCallback : public nsITaskbarPreviewCallback { public: TaskbarPreviewCallback() : mIsThumbnail(true) { } NS_DECL_ISUPPORTS NS_DECL_NSITASKBARPREVIEWCALLBACK void SetPreview(TaskbarPreview* aPreview) { mPreview = aPreview; } void SetIsPreview() { mIsThumbnail = false; } protected: virtual ~TaskbarPreviewCallback() {} private: RefPtr<TaskbarPreview> mPreview; bool mIsThumbnail; }; } // namespace widget } // namespace mozilla #endif /* __mozilla_widget_TaskbarPreview_h__ */