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comparison: accessible/src/windows/msaa/HTMLWin32ObjectAccessible.cpp
accessible/src/windows/msaa/HTMLWin32ObjectAccessible.cpp
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| 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/. */ | |
| 5 | |
| 6 #include "HTMLWin32ObjectAccessible.h" | |
| 7 | |
| 8 #include "Role.h" | |
| 9 #include "States.h" | |
| 10 | |
| 11 using namespace mozilla::a11y; | |
| 12 | |
| 13 //////////////////////////////////////////////////////////////////////////////// | |
| 14 // HTMLWin32ObjectOwnerAccessible | |
| 15 //////////////////////////////////////////////////////////////////////////////// | |
| 16 | |
| 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 } | |
| 26 | |
| 27 //////////////////////////////////////////////////////////////////////////////// | |
| 28 // HTMLWin32ObjectOwnerAccessible: Accessible implementation | |
| 29 | |
| 30 void | |
| 31 HTMLWin32ObjectOwnerAccessible::Shutdown() | |
| 32 { | |
| 33 AccessibleWrap::Shutdown(); | |
| 34 mNativeAccessible = nullptr; | |
| 35 } | |
| 36 | |
| 37 role | |
| 38 HTMLWin32ObjectOwnerAccessible::NativeRole() | |
| 39 { | |
| 40 return roles::EMBEDDED_OBJECT; | |
| 41 } | |
| 42 | |
| 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 } | |
| 50 | |
| 51 //////////////////////////////////////////////////////////////////////////////// | |
| 52 // HTMLWin32ObjectOwnerAccessible: Accessible protected implementation | |
| 53 | |
| 54 void | |
| 55 HTMLWin32ObjectOwnerAccessible::CacheChildren() | |
| 56 { | |
| 57 if (mNativeAccessible) | |
| 58 AppendChild(mNativeAccessible); | |
| 59 } | |
| 60 | |
| 61 | |
| 62 //////////////////////////////////////////////////////////////////////////////// | |
| 63 // HTMLWin32ObjectAccessible | |
| 64 //////////////////////////////////////////////////////////////////////////////// | |
| 65 | |
| 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 } | |
| 81 | |
| 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 } | |
| 92 |
