1 /* 2 * Copyright (C) 2011 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 * 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 AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "config.h" 27 #include "AccessibilityScrollView.h" 28 29 #include "AXObjectCache.h" 30 #include "AccessibilityScrollbar.h" 31 #include "FrameView.h" 32 #include "HTMLFrameOwnerElement.h" 33 #include "RenderPart.h" 34 #include "ScrollView.h" 35 #include "Widget.h" 36 37 namespace WebCore { 38 39 AccessibilityScrollView::AccessibilityScrollView(ScrollView* view) 40 : m_scrollView(view) 41 { 42 } 43 44 PassRefPtr<AccessibilityScrollView> AccessibilityScrollView::create(ScrollView* view) 45 { 46 return adoptRef(new AccessibilityScrollView(view)); 47 } 48 49 AccessibilityObject* AccessibilityScrollView::scrollBar(AccessibilityOrientation orientation) const 50 { 51 switch (orientation) { 52 case AccessibilityOrientationVertical: 53 return m_verticalScrollbar ? m_verticalScrollbar.get() : 0; 54 case AccessibilityOrientationHorizontal: 55 return m_horizontalScrollbar ? m_horizontalScrollbar.get() : 0; 56 } 57 58 return 0; 59 } 60 61 const AccessibilityObject::AccessibilityChildrenVector& AccessibilityScrollView::children() 62 { 63 if (!m_haveChildren) 64 addChildren(); 65 return m_children; 66 } 67 68 // If this is WebKit1 then the native scroll view needs to return the 69 // AX information (because there are no scroll bar children in the ScrollView object in WK1). 70 // In WebKit2, the ScrollView object will return the AX information (because there are no platform widgets). 71 bool AccessibilityScrollView::isAttachment() const 72 { 73 return m_scrollView->platformWidget(); 74 } 75 76 Widget* AccessibilityScrollView::widgetForAttachmentView() const 77 { 78 return m_scrollView.get(); 79 } 80 81 void AccessibilityScrollView::updateChildrenIfNecessary() 82 { 83 if (m_scrollView->horizontalScrollbar() && !m_horizontalScrollbar) 84 m_horizontalScrollbar = addChildScrollbar(m_scrollView->horizontalScrollbar()); 85 else if (!m_scrollView->horizontalScrollbar() && m_horizontalScrollbar) { 86 removeChildScrollbar(m_horizontalScrollbar.get()); 87 m_horizontalScrollbar = 0; 88 } 89 90 if (m_scrollView->verticalScrollbar() && !m_verticalScrollbar) 91 m_verticalScrollbar = addChildScrollbar(m_scrollView->verticalScrollbar()); 92 else if (!m_scrollView->verticalScrollbar() && m_verticalScrollbar) { 93 removeChildScrollbar(m_verticalScrollbar.get()); 94 m_verticalScrollbar = 0; 95 } 96 } 97 98 void AccessibilityScrollView::removeChildScrollbar(AccessibilityObject* scrollbar) 99 { 100 size_t pos = m_children.find(scrollbar); 101 if (pos != WTF::notFound) 102 m_children.remove(pos); 103 } 104 105 AccessibilityScrollbar* AccessibilityScrollView::addChildScrollbar(Scrollbar* scrollbar) 106 { 107 if (!scrollbar) 108 return 0; 109 110 AccessibilityScrollbar* scrollBarObject = static_cast<AccessibilityScrollbar*>(axObjectCache()->getOrCreate(scrollbar)); 111 scrollBarObject->setParent(this); 112 m_children.append(scrollBarObject); 113 return scrollBarObject; 114 } 115 116 void AccessibilityScrollView::addChildren() 117 { 118 ASSERT(!m_haveChildren); 119 m_haveChildren = true; 120 121 AccessibilityObject* webArea = webAreaObject(); 122 if (webArea) 123 m_children.append(webArea); 124 125 updateChildrenIfNecessary(); 126 } 127 128 AccessibilityObject* AccessibilityScrollView::webAreaObject() const 129 { 130 if (!m_scrollView->isFrameView()) 131 return 0; 132 133 Document* doc = static_cast<FrameView*>(m_scrollView.get())->frame()->document(); 134 if (!doc || !doc->renderer()) 135 return 0; 136 137 return axObjectCache()->getOrCreate(doc->renderer()); 138 } 139 140 AccessibilityObject* AccessibilityScrollView::accessibilityHitTest(const IntPoint& point) const 141 { 142 AccessibilityObject* webArea = webAreaObject(); 143 if (!webArea) 144 return 0; 145 146 if (m_horizontalScrollbar && m_horizontalScrollbar->elementRect().contains(point)) 147 return m_horizontalScrollbar.get(); 148 if (m_verticalScrollbar && m_verticalScrollbar->elementRect().contains(point)) 149 return m_verticalScrollbar.get(); 150 151 return webArea->accessibilityHitTest(point); 152 } 153 154 IntRect AccessibilityScrollView::elementRect() const 155 { 156 return m_scrollView->frameRect(); 157 } 158 159 FrameView* AccessibilityScrollView::documentFrameView() const 160 { 161 if (!m_scrollView->isFrameView()) 162 return 0; 163 164 return static_cast<FrameView*>(m_scrollView.get()); 165 } 166 167 AccessibilityObject* AccessibilityScrollView::parentObject() const 168 { 169 if (!m_scrollView->isFrameView()) 170 return 0; 171 172 HTMLFrameOwnerElement* owner = static_cast<FrameView*>(m_scrollView.get())->frame()->ownerElement(); 173 if (owner && owner->renderPart()) 174 return axObjectCache()->getOrCreate(owner->renderPart()->parent()); 175 176 return 0; 177 } 178 179 } // namespace WebCore 180
