michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim:expandtab:shiftwidth=2:tabstop=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 nsWinUtils_h_
michael@0: #define nsWinUtils_h_
michael@0: 
michael@0: #include <windows.h>
michael@0: 
michael@0: #include "nsIDOMCSSStyleDeclaration.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsRefPtrHashtable.h"
michael@0: 
michael@0: class nsIArray;
michael@0: class nsIContent;
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace a11y {
michael@0: 
michael@0: class DocAccessible;
michael@0: 
michael@0: const LPCWSTR kClassNameRoot = L"MozillaUIWindowClass";
michael@0: const LPCWSTR kClassNameTabContent = L"MozillaContentWindowClass";
michael@0: 
michael@0: class nsWinUtils
michael@0: {
michael@0: public:
michael@0:   /**
michael@0:    * Return computed styles declaration for the given node.
michael@0:    *
michael@0:    * @note Please use it carefully since it can shutdown the accessible tree
michael@0:    *       you operate on.
michael@0:    */
michael@0:   static already_AddRefed<nsIDOMCSSStyleDeclaration>
michael@0:     GetComputedStyleDeclaration(nsIContent* aContent);
michael@0: 
michael@0:   /**
michael@0:    * Start window emulation if presence of specific AT is detected.
michael@0:    */
michael@0:   static bool MaybeStartWindowEmulation();
michael@0: 
michael@0:   /**
michael@0:    * Free resources used for window emulation.
michael@0:    */
michael@0:   static void ShutdownWindowEmulation();
michael@0: 
michael@0:   /**
michael@0:    * Return true if window emulation is started.
michael@0:    */
michael@0:   static bool IsWindowEmulationStarted();
michael@0: 
michael@0:   /**
michael@0:    * Helper to register window class.
michael@0:    */
michael@0:   static void RegisterNativeWindow(LPCWSTR aWindowClass);
michael@0: 
michael@0:   /**
michael@0:    * Helper to create a window.
michael@0:    */
michael@0:   static HWND CreateNativeWindow(LPCWSTR aWindowClass, HWND aParentWnd,
michael@0:                                  int aX, int aY, int aWidth, int aHeight,
michael@0:                                  bool aIsActive);
michael@0: 
michael@0:   /**
michael@0:    * Helper to show window.
michael@0:    */
michael@0:   static void ShowNativeWindow(HWND aWnd);
michael@0: 
michael@0:   /**
michael@0:    * Helper to hide window.
michael@0:    */
michael@0:   static void HideNativeWindow(HWND aWnd);
michael@0: 
michael@0:   /**
michael@0:    * Cache for HWNDs of windows created for document accessibles in windows
michael@0:    * emulation mode.
michael@0:    */
michael@0:   static nsRefPtrHashtable<nsPtrHashKey<void>, DocAccessible>* sHWNDCache;
michael@0: };
michael@0: 
michael@0: } // namespace a11y
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif