1/* 2 * Copyright (C) 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 * 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 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include "config.h" 30#include "AccessibilityTableRow.h" 31 32#include "AXObjectCache.h" 33#include "AccessibilityTableCell.h" 34#include "HTMLNames.h" 35#include "HTMLTableRowElement.h" 36#include "RenderObject.h" 37#include "RenderTableCell.h" 38#include "RenderTableRow.h" 39 40using namespace std; 41 42namespace WebCore { 43 44using namespace HTMLNames; 45 46AccessibilityTableRow::AccessibilityTableRow(RenderObject* renderer) 47 : AccessibilityRenderObject(renderer) 48{ 49} 50 51AccessibilityTableRow::~AccessibilityTableRow() 52{ 53} 54 55PassRefPtr<AccessibilityTableRow> AccessibilityTableRow::create(RenderObject* renderer) 56{ 57 return adoptRef(new AccessibilityTableRow(renderer)); 58} 59 60AccessibilityRole AccessibilityTableRow::determineAccessibilityRole() 61{ 62 if (!isTableRow()) 63 return AccessibilityRenderObject::determineAccessibilityRole(); 64 65 m_ariaRole = determineAriaRoleAttribute(); 66 67 AccessibilityRole ariaRole = ariaRoleAttribute(); 68 if (ariaRole != UnknownRole) 69 return ariaRole; 70 71 return RowRole; 72} 73 74bool AccessibilityTableRow::isTableRow() const 75{ 76 AccessibilityObject* table = parentTable(); 77 if (!table || !table->isAccessibilityTable()) 78 return false; 79 80 return true; 81} 82 83AccessibilityObject* AccessibilityTableRow::observableObject() const 84{ 85 // This allows the table to be the one who sends notifications about tables. 86 return parentTable(); 87} 88 89bool AccessibilityTableRow::computeAccessibilityIsIgnored() const 90{ 91 AccessibilityObjectInclusion decision = defaultObjectInclusion(); 92 if (decision == IncludeObject) 93 return false; 94 if (decision == IgnoreObject) 95 return true; 96 97 if (!isTableRow()) 98 return AccessibilityRenderObject::computeAccessibilityIsIgnored(); 99 100 return false; 101} 102 103AccessibilityObject* AccessibilityTableRow::parentTable() const 104{ 105 // The parent table might not be the direct ancestor of the row unfortunately. ARIA states that role="grid" should 106 // only have "row" elements, but if not, we still should handle it gracefully by finding the right table. 107 for (AccessibilityObject* parent = parentObject(); parent; parent = parent->parentObject()) { 108 // If this is a table object, but not an accessibility table, we should stop because we don't want to 109 // choose another ancestor table as this row's table. 110 if (parent->isTable()) 111 return parent->isAccessibilityTable() ? parent : 0; 112 } 113 114 return 0; 115} 116 117AccessibilityObject* AccessibilityTableRow::headerObject() 118{ 119 if (!m_renderer || !m_renderer->isTableRow()) 120 return 0; 121 122 AccessibilityChildrenVector rowChildren = children(); 123 if (!rowChildren.size()) 124 return 0; 125 126 // check the first element in the row to see if it is a TH element 127 AccessibilityObject* cell = rowChildren[0].get(); 128 if (!cell->isTableCell()) 129 return 0; 130 131 RenderObject* cellRenderer = static_cast<AccessibilityTableCell*>(cell)->renderer(); 132 if (!cellRenderer) 133 return 0; 134 135 Node* cellNode = cellRenderer->node(); 136 if (!cellNode || !cellNode->hasTagName(thTag)) 137 return 0; 138 139 return cell; 140} 141 142} // namespace WebCore 143