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| 1 /* | |
| 2 * Copyright (C) 2008, 2009, 2010 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 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 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 | |
| 27 #include "config.h" | |
| 28 #include "AXObjectCache.h" | |
| 29 | |
| 30 #include "AccessibilityObject.h" | |
| 31 #include "Chrome.h" | |
| 32 #include "Document.h" | |
| 33 #include "Page.h" | |
| 34 #include "RenderObject.h" | |
| 35 | |
| 36 using namespace std; | |
| 37 | |
| 38 namespace WebCore { | |
| 39 | |
| 40 void AXObjectCache::detachWrapper(AccessibilityObject* obj) | |
| 41 { | |
| 42 // On Windows, AccessibilityObjects are created when get_accChildCount is | |
| 43 // called, but they are not wrapped until get_accChild is called, so this | |
| 44 // object may not have a wrapper. | |
| 45 if (AccessibilityObjectWrapper* wrapper = obj->wrapper()) | |
| 46 wrapper->detach(); | |
| 47 } | |
| 48 | |
| 49 void AXObjectCache::attachWrapper(AccessibilityObject*) | |
| 50 { | |
| 51 // On Windows, AccessibilityObjects are wrapped when the accessibility | |
| 52 // software requests them via get_accChild. | |
| 53 } | |
| 54 | |
| 55 void AXObjectCache::handleScrolledToAnchor(const Node* anchorNode) | |
| 56 { | |
| 57 // The anchor node may not be accessible. Post the notification for the | |
| 58 // first accessible object. | |
| 59 postPlatformNotification(AccessibilityObject::firstAccessibleObjectFromNode(
anchorNode), AXScrolledToAnchor); | |
| 60 } | |
| 61 | |
| 62 void AXObjectCache::postPlatformNotification(AccessibilityObject* obj, AXNotific
ation notification) | |
| 63 { | |
| 64 if (!obj) | |
| 65 return; | |
| 66 | |
| 67 Document* document = obj->document(); | |
| 68 if (!document) | |
| 69 return; | |
| 70 | |
| 71 Page* page = document->page(); | |
| 72 if (!page || !page->chrome()->platformPageClient()) | |
| 73 return; | |
| 74 | |
| 75 DWORD msaaEvent; | |
| 76 switch (notification) { | |
| 77 case AXFocusedUIElementChanged: | |
| 78 case AXActiveDescendantChanged: | |
| 79 msaaEvent = EVENT_OBJECT_FOCUS; | |
| 80 break; | |
| 81 | |
| 82 case AXScrolledToAnchor: | |
| 83 msaaEvent = EVENT_SYSTEM_SCROLLINGSTART; | |
| 84 break; | |
| 85 | |
| 86 case AXValueChanged: | |
| 87 case AXMenuListValueChanged: | |
| 88 msaaEvent = EVENT_OBJECT_VALUECHANGE; | |
| 89 break; | |
| 90 | |
| 91 case AXMenuListItemSelected: | |
| 92 msaaEvent = EVENT_OBJECT_SELECTION; | |
| 93 break; | |
| 94 | |
| 95 default: | |
| 96 return; | |
| 97 } | |
| 98 | |
| 99 // Windows will end up calling get_accChild() on the root accessible | |
| 100 // object for the WebView, passing the child ID that we specify below. We | |
| 101 // negate the AXID so we know that the caller is passing the ID of an | |
| 102 // element, not the index of a child element. | |
| 103 | |
| 104 ASSERT(obj->axObjectID() >= 1); | |
| 105 ASSERT(obj->axObjectID() <= numeric_limits<LONG>::max()); | |
| 106 | |
| 107 NotifyWinEvent(msaaEvent, page->chrome()->platformPageClient(), OBJID_CLIENT
, -static_cast<LONG>(obj->axObjectID())); | |
| 108 } | |
| 109 | |
| 110 void AXObjectCache::nodeTextChangePlatformNotification(AccessibilityObject*, AXT
extChange, unsigned, const String&) | |
| 111 { | |
| 112 } | |
| 113 | |
| 114 void AXObjectCache::frameLoadingEventPlatformNotification(AccessibilityObject*,
AXLoadingEvent) | |
| 115 { | |
| 116 } | |
| 117 | |
| 118 AXID AXObjectCache::platformGenerateAXID() const | |
| 119 { | |
| 120 static AXID lastUsedID = 0; | |
| 121 | |
| 122 // Generate a new ID. Windows accessibility relies on a positive AXID, | |
| 123 // ranging from 1 to LONG_MAX. | |
| 124 AXID objID = lastUsedID; | |
| 125 do { | |
| 126 ++objID; | |
| 127 objID %= std::numeric_limits<LONG>::max(); | |
| 128 } while (objID == 0 || HashTraits<AXID>::isDeletedValue(objID) || m_idsInUse
.contains(objID)); | |
| 129 | |
| 130 ASSERT(objID >= 1 && objID <= std::numeric_limits<LONG>::max()); | |
| 131 | |
| 132 lastUsedID = objID; | |
| 133 | |
| 134 return objID; | |
| 135 } | |
| 136 | |
| 137 void AXObjectCache::handleFocusedUIElementChanged(Node*, Node* newFocusedNode) | |
| 138 { | |
| 139 if (!newFocusedNode) | |
| 140 return; | |
| 141 | |
| 142 Page* page = newFocusedNode->document()->page(); | |
| 143 if (!page || !page->chrome()->platformPageClient()) | |
| 144 return; | |
| 145 | |
| 146 AccessibilityObject* focusedObject = focusedUIElementForPage(page); | |
| 147 if (!focusedObject) | |
| 148 return; | |
| 149 | |
| 150 ASSERT(!focusedObject->accessibilityIsIgnored()); | |
| 151 | |
| 152 postPlatformNotification(focusedObject, AXFocusedUIElementChanged); | |
| 153 } | |
| 154 | |
| 155 } // namespace WebCore | |
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Chromium Code Reviews
Issue 13642009:
WebCore: Remove PLATFORM(WIN) files we do not use. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk