michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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: #include "HTMLWin32ObjectAccessible.h"
michael@0: 
michael@0: #include "Role.h"
michael@0: #include "States.h"
michael@0: 
michael@0: using namespace mozilla::a11y;
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLWin32ObjectOwnerAccessible
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: HTMLWin32ObjectOwnerAccessible::
michael@0:   HTMLWin32ObjectOwnerAccessible(nsIContent* aContent,
michael@0:                                  DocAccessible* aDoc, void* aHwnd) :
michael@0:   AccessibleWrap(aContent, aDoc), mHwnd(aHwnd)
michael@0: {
michael@0:   // Our only child is a HTMLWin32ObjectAccessible object.
michael@0:   if (mHwnd)
michael@0:     mNativeAccessible = new HTMLWin32ObjectAccessible(mHwnd);
michael@0: }
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLWin32ObjectOwnerAccessible: Accessible implementation
michael@0: 
michael@0: void
michael@0: HTMLWin32ObjectOwnerAccessible::Shutdown()
michael@0: {
michael@0:   AccessibleWrap::Shutdown();
michael@0:   mNativeAccessible = nullptr;
michael@0: }
michael@0: 
michael@0: role
michael@0: HTMLWin32ObjectOwnerAccessible::NativeRole()
michael@0: {
michael@0:   return roles::EMBEDDED_OBJECT;
michael@0: }
michael@0: 
michael@0: bool
michael@0: HTMLWin32ObjectOwnerAccessible::NativelyUnavailable() const
michael@0: {
michael@0:   // XXX: No HWND means this is windowless plugin which is not accessible in
michael@0:   // the meantime.
michael@0:   return !mHwnd;
michael@0: }
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLWin32ObjectOwnerAccessible: Accessible protected implementation
michael@0: 
michael@0: void
michael@0: HTMLWin32ObjectOwnerAccessible::CacheChildren()
michael@0: {
michael@0:   if (mNativeAccessible)
michael@0:     AppendChild(mNativeAccessible);
michael@0: }
michael@0: 
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLWin32ObjectAccessible
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: HTMLWin32ObjectAccessible::HTMLWin32ObjectAccessible(void* aHwnd) :
michael@0:   DummyAccessible()
michael@0: {
michael@0:   mHwnd = aHwnd;
michael@0:   if (mHwnd) {
michael@0:     // The plugin is not windowless. In this situation we use 
michael@0:     // use its inner child owned by the plugin so that we don't get
michael@0:     // in an infinite loop, where the WM_GETOBJECT's get forwarded
michael@0:     // back to us and create another HTMLWin32ObjectAccessible
michael@0:     HWND childWnd = ::GetWindow((HWND)aHwnd, GW_CHILD);
michael@0:     if (childWnd) {
michael@0:       mHwnd = childWnd;
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP 
michael@0: HTMLWin32ObjectAccessible::GetNativeInterface(void** aNativeAccessible)
michael@0: {
michael@0:   if (mHwnd) {
michael@0:     ::AccessibleObjectFromWindow(static_cast<HWND>(mHwnd),
michael@0:                                  OBJID_WINDOW, IID_IAccessible,
michael@0:                                  aNativeAccessible);
michael@0:   }
michael@0:   return NS_OK;
michael@0: }
michael@0: