The Tor Browser: accessible/src/windows/msaa/HTMLWin32ObjectAccessible.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "HTMLWin32ObjectAccessible.h"

     8 #include "Role.h"

     9 #include "States.h"

    11 using namespace mozilla::a11y;

    13 ////////////////////////////////////////////////////////////////////////////////

    14 // HTMLWin32ObjectOwnerAccessible

    15 ////////////////////////////////////////////////////////////////////////////////

    17 HTMLWin32ObjectOwnerAccessible::

    18   HTMLWin32ObjectOwnerAccessible(nsIContent* aContent,

    19                                  DocAccessible* aDoc, void* aHwnd) :

    20   AccessibleWrap(aContent, aDoc), mHwnd(aHwnd)

    21 {

    22   // Our only child is a HTMLWin32ObjectAccessible object.

    23   if (mHwnd)

    24     mNativeAccessible = new HTMLWin32ObjectAccessible(mHwnd);

    25 }

    27 ////////////////////////////////////////////////////////////////////////////////

    28 // HTMLWin32ObjectOwnerAccessible: Accessible implementation

    30 void

    31 HTMLWin32ObjectOwnerAccessible::Shutdown()

    32 {

    33   AccessibleWrap::Shutdown();

    34   mNativeAccessible = nullptr;

    35 }

    37 role

    38 HTMLWin32ObjectOwnerAccessible::NativeRole()

    39 {

    40   return roles::EMBEDDED_OBJECT;

    41 }

    43 bool

    44 HTMLWin32ObjectOwnerAccessible::NativelyUnavailable() const

    45 {

    46   // XXX: No HWND means this is windowless plugin which is not accessible in

    47   // the meantime.

    48   return !mHwnd;

    49 }

    51 ////////////////////////////////////////////////////////////////////////////////

    52 // HTMLWin32ObjectOwnerAccessible: Accessible protected implementation

    54 void

    55 HTMLWin32ObjectOwnerAccessible::CacheChildren()

    56 {

    57   if (mNativeAccessible)

    58     AppendChild(mNativeAccessible);

    59 }

    62 ////////////////////////////////////////////////////////////////////////////////

    63 // HTMLWin32ObjectAccessible

    64 ////////////////////////////////////////////////////////////////////////////////

    66 HTMLWin32ObjectAccessible::HTMLWin32ObjectAccessible(void* aHwnd) :

    67   DummyAccessible()

    68 {

    69   mHwnd = aHwnd;

    70   if (mHwnd) {

    71     // The plugin is not windowless. In this situation we use

    72     // use its inner child owned by the plugin so that we don't get

    73     // in an infinite loop, where the WM_GETOBJECT's get forwarded

    74     // back to us and create another HTMLWin32ObjectAccessible

    75     HWND childWnd = ::GetWindow((HWND)aHwnd, GW_CHILD);

    76     if (childWnd) {

    77       mHwnd = childWnd;

    78     }

    79   }

    80 }

    82 NS_IMETHODIMP

    83 HTMLWin32ObjectAccessible::GetNativeInterface(void** aNativeAccessible)

    84 {

    85   if (mHwnd) {

    86     ::AccessibleObjectFromWindow(static_cast<HWND>(mHwnd),

    87                                  OBJID_WINDOW, IID_IAccessible,

    88                                  aNativeAccessible);

    89   }

    90   return NS_OK;

    91 }

The Tor Browser / file revision