blob: 989c90a6ad75bec5dd4657941df3d55613aad477 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "views/accessibility/view_accessibility_wrapper.h"
#include "base/scoped_variant_win.h"
#include "views/accessibility/view_accessibility.h"
////////////////////////////////////////////////////////////////////////////////
//
// ViewAccessibilityWrapper - constructors, destructors
//
////////////////////////////////////////////////////////////////////////////////
ViewAccessibilityWrapper::ViewAccessibilityWrapper(views::View* view)
: accessibility_info_(NULL),
view_(view) {
}
STDMETHODIMP ViewAccessibilityWrapper::CreateDefaultInstance(REFIID iid) {
if (IID_IUnknown == iid || IID_IDispatch == iid || IID_IAccessible == iid) {
// If there is no instance of ViewAccessibility created, create it
// now. Otherwise reuse previous instance.
if (!accessibility_info_) {
CComObject<ViewAccessibility>* instance = NULL;
HRESULT hr = CComObject<ViewAccessibility>::CreateInstance(&instance);
if (!SUCCEEDED(hr) || !instance)
return E_FAIL;
ScopedComPtr<IAccessible> accessibility_instance(instance);
if (!SUCCEEDED(instance->Initialize(view_)))
return E_FAIL;
// All is well, assign the temp instance to the class smart pointer.
accessibility_info_.Attach(accessibility_instance.Detach());
}
return S_OK;
}
// Interface not supported.
return E_NOINTERFACE;
}
HRESULT ViewAccessibilityWrapper::Uninitialize() {
view_ = NULL;
if (accessibility_info_.get()) {
accessibility_info_->put_accValue(
ScopedVariant(kViewsUninitializeAccessibilityInstance), NULL);
::CoDisconnectObject(accessibility_info_.get(), 0);
accessibility_info_ = NULL;
}
return S_OK;
}
STDMETHODIMP ViewAccessibilityWrapper::GetInstance(REFIID iid,
void** interface_ptr) {
if (IID_IUnknown == iid || IID_IDispatch == iid || IID_IAccessible == iid) {
// If there is no accessibility instance created, create a default now.
// Otherwise reuse previous instance.
if (!accessibility_info_) {
HRESULT hr = CreateDefaultInstance(iid);
if (hr != S_OK) {
// Interface creation failed.
*interface_ptr = NULL;
return E_NOINTERFACE;
}
}
*interface_ptr = static_cast<IAccessible*>(accessibility_info_);
return S_OK;
}
// No supported interface found, return error.
*interface_ptr = NULL;
return E_NOINTERFACE;
}
STDMETHODIMP ViewAccessibilityWrapper::SetInstance(IAccessible* interface_ptr) {
if (!interface_ptr)
return E_NOINTERFACE;
accessibility_info_.Attach(interface_ptr);
// Paranoia check, to make sure we do have a valid IAccessible pointer stored.
if (!accessibility_info_)
return E_FAIL;
return S_OK;
}
|
