AXObjectCacheMac.mm revision 2daae5fd11344eaa88a0d92b0f6d65f8d2255c00 
1/*
2 * Copyright (C) 2003, 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#import "config.h"
27#import "AXObjectCache.h"
28
29#if HAVE(ACCESSIBILITY)
30
31#import "AccessibilityObject.h"
32#import "AccessibilityObjectWrapper.h"
33#import "RenderObject.h"
34#import "WebCoreSystemInterface.h"
35
36#import <wtf/PassRefPtr.h>
37
38#ifndef NSAccessibilityLiveRegionChangedNotification
39#define NSAccessibilityLiveRegionChangedNotification @"AXLiveRegionChanged"
40#endif
41
42// The simple Cocoa calls in this file don't throw exceptions.
43
44namespace WebCore {
45
46void AXObjectCache::detachWrapper(AccessibilityObject* obj)
47{
48    [obj->wrapper() detach];
49    [obj->wrapper() release];
50    obj->setWrapper(0);
51}
52
53void AXObjectCache::attachWrapper(AccessibilityObject* obj)
54{
55    obj->setWrapper([[AccessibilityObjectWrapper alloc] initWithAccessibilityObject:obj]);
56}
57
58void AXObjectCache::postPlatformNotification(AccessibilityObject* obj, AXNotification notification)
59{
60    if (!obj)
61        return;
62
63    // Some notifications are unique to Safari and do not have NSAccessibility equivalents.
64    String macNotification;
65    switch (notification) {
66        case AXActiveDescendantChanged:
67            // An active descendant change for trees means a selected rows change.
68            if (obj->isTree())
69                macNotification = NSAccessibilitySelectedRowsChangedNotification;
70            else
71                macNotification = NSAccessibilityFocusedUIElementChangedNotification;
72            break;
73        case AXAutocorrectionOccured:
74#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_SNOW_LEOPARD)
75            macNotification = @"AXAutocorrectionOccurred";
76            break;
77#else
78            return;
79#endif
80        case AXFocusedUIElementChanged:
81            macNotification = NSAccessibilityFocusedUIElementChangedNotification;
82            break;
83        case AXLayoutComplete:
84            macNotification = "AXLayoutComplete";
85            break;
86        case AXLoadComplete:
87            macNotification = "AXLoadComplete";
88            break;
89        case AXInvalidStatusChanged:
90            macNotification = "AXInvalidStatusChanged";
91            break;
92        case AXSelectedChildrenChanged:
93            macNotification = NSAccessibilitySelectedChildrenChangedNotification;
94            break;
95        case AXSelectedTextChanged:
96            macNotification = NSAccessibilitySelectedTextChangedNotification;
97            break;
98        case AXValueChanged:
99            macNotification = NSAccessibilityValueChangedNotification;
100            break;
101        case AXLiveRegionChanged:
102            macNotification = NSAccessibilityLiveRegionChangedNotification;
103            break;
104        case AXRowCountChanged:
105            macNotification = NSAccessibilityRowCountChangedNotification;
106            break;
107#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD)
108        case AXRowExpanded:
109            macNotification = NSAccessibilityRowExpandedNotification;
110            break;
111        case AXRowCollapsed:
112            macNotification = NSAccessibilityRowCollapsedNotification;
113            break;
114#endif
115            // Does not exist on Mac.
116        case AXCheckedStateChanged:
117        default:
118            return;
119    }
120
121    // NSAccessibilityPostNotification will call this method, (but not when running DRT), so ASSERT here to make sure it does not crash.
122    // https://bugs.webkit.org/show_bug.cgi?id=46662
123    ASSERT([obj->wrapper() accessibilityIsIgnored] || true);
124
125    NSAccessibilityPostNotification(obj->wrapper(), macNotification);
126
127    // Used by DRT to know when notifications are posted.
128    [obj->wrapper() accessibilityPostedNotification:macNotification];
129}
130
131void AXObjectCache::nodeTextChangePlatformNotification(AccessibilityObject*, AXTextChange, unsigned, unsigned)
132{
133}
134
135void AXObjectCache::handleFocusedUIElementChanged(RenderObject*, RenderObject*)
136{
137    wkAccessibilityHandleFocusChanged();
138}
139
140void AXObjectCache::handleScrolledToAnchor(const Node*)
141{
142}
143
144}
145
146#endif // HAVE(ACCESSIBILITY)
147