1 /*
2 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
3 * Copyright (C) 2008 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "config.h"
28 #include "AXObjectCache.h"
29 #include "AccessibilityObject.h"
30 #include "AccessibilityScrollbar.h"
31 #include "Chrome.h"
32 #include "ChromeClient.h"
33 #include "FrameView.h"
34 #include "Scrollbar.h"
35
36 namespace WebCore {
37
detachWrapper(AccessibilityObject * obj)38 void AXObjectCache::detachWrapper(AccessibilityObject* obj)
39 {
40 // In Chromium, AccessibilityObjects are wrapped lazily.
41 if (AccessibilityObjectWrapper* wrapper = obj->wrapper())
42 wrapper->detach();
43 }
44
attachWrapper(AccessibilityObject *)45 void AXObjectCache::attachWrapper(AccessibilityObject*)
46 {
47 // In Chromium, AccessibilityObjects are wrapped lazily.
48 }
49
postPlatformNotification(AccessibilityObject * obj,AXNotification notification)50 void AXObjectCache::postPlatformNotification(AccessibilityObject* obj, AXNotification notification)
51 {
52 if (obj && obj->isAccessibilityScrollbar() && notification == AXValueChanged) {
53 // Send document value changed on scrollbar value changed notification.
54 Scrollbar* scrollBar = static_cast<AccessibilityScrollbar*>(obj)->scrollbar();
55 if (!scrollBar || !scrollBar->parent() || !scrollBar->parent()->isFrameView())
56 return;
57 Document* document = static_cast<FrameView*>(scrollBar->parent())->frame()->document();
58 if (document != document->topDocument())
59 return;
60 obj = get(document->renderer());
61 }
62
63 if (!obj || !obj->document() || !obj->documentFrameView() || !obj->documentFrameView()->frame() || !obj->documentFrameView()->frame()->page())
64 return;
65
66 ChromeClient* client = obj->documentFrameView()->frame()->page()->chrome()->client();
67 if (!client)
68 return;
69
70 switch (notification) {
71 case AXActiveDescendantChanged:
72 if (!obj->document()->focusedNode() || (obj->node() != obj->document()->focusedNode()))
73 break;
74
75 // Calling handleFocusedUIElementChanged will focus the new active
76 // descendant and send the AXFocusedUIElementChanged notification.
77 handleFocusedUIElementChanged(0, obj->document()->focusedNode()->renderer());
78 break;
79 case AXAutocorrectionOccured:
80 case AXCheckedStateChanged:
81 case AXChildrenChanged:
82 case AXFocusedUIElementChanged:
83 case AXLayoutComplete:
84 case AXLiveRegionChanged:
85 case AXLoadComplete:
86 case AXMenuListValueChanged:
87 case AXRowCollapsed:
88 case AXRowCountChanged:
89 case AXRowExpanded:
90 case AXScrolledToAnchor:
91 case AXSelectedChildrenChanged:
92 case AXSelectedTextChanged:
93 case AXValueChanged:
94 case AXInvalidStatusChanged:
95 break;
96 }
97
98 client->postAccessibilityNotification(obj, notification);
99 }
100
nodeTextChangePlatformNotification(AccessibilityObject *,AXTextChange,unsigned,unsigned)101 void AXObjectCache::nodeTextChangePlatformNotification(AccessibilityObject*, AXTextChange, unsigned, unsigned)
102 {
103 }
104
handleFocusedUIElementChanged(RenderObject *,RenderObject * newFocusedRenderer)105 void AXObjectCache::handleFocusedUIElementChanged(RenderObject*, RenderObject* newFocusedRenderer)
106 {
107 if (!newFocusedRenderer)
108 return;
109
110 Page* page = newFocusedRenderer->document()->page();
111 if (!page)
112 return;
113
114 AccessibilityObject* focusedObject = focusedUIElementForPage(page);
115 if (!focusedObject)
116 return;
117
118 postPlatformNotification(focusedObject, AXFocusedUIElementChanged);
119 }
120
handleScrolledToAnchor(const Node * anchorNode)121 void AXObjectCache::handleScrolledToAnchor(const Node* anchorNode)
122 {
123 // The anchor node may not be accessible. Post the notification for the
124 // first accessible object.
125 postPlatformNotification(AccessibilityObject::firstAccessibleObjectFromNode(anchorNode), AXScrolledToAnchor);
126 }
127
128 } // namespace WebCore
129