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 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 "AccessibilityTable.h" 34#include "AccessibilityTableCell.h" 35#include "HTMLNames.h" 36#include "HTMLTableRowElement.h" 37#include "RenderObject.h" 38#include "RenderTableCell.h" 39#include "RenderTableRow.h" 40 41namespace WebCore { 42 43using namespace HTMLNames; 44 45AccessibilityTableRow::AccessibilityTableRow(RenderObject* renderer) 46 : AccessibilityRenderObject(renderer) 47{ 48} 49 50AccessibilityTableRow::~AccessibilityTableRow() 51{ 52} 53 54PassRefPtr<AccessibilityTableRow> AccessibilityTableRow::create(RenderObject* renderer) 55{ 56 return adoptRef(new AccessibilityTableRow(renderer)); 57} 58 59AccessibilityRole AccessibilityTableRow::determineAccessibilityRole() 60{ 61 if (!isTableRow()) 62 return AccessibilityRenderObject::determineAccessibilityRole(); 63 64 m_ariaRole = determineAriaRoleAttribute(); 65 66 AccessibilityRole ariaRole = ariaRoleAttribute(); 67 if (ariaRole != UnknownRole) 68 return ariaRole; 69 70 return RowRole; 71} 72 73bool AccessibilityTableRow::isTableRow() const 74{ 75 AccessibilityObject* table = parentTable(); 76 if (!table || !table->isAccessibilityTable()) 77 return false; 78 79 return true; 80} 81 82AccessibilityObject* AccessibilityTableRow::observableObject() const 83{ 84 // This allows the table to be the one who sends notifications about tables. 85 return parentTable(); 86} 87 88bool AccessibilityTableRow::computeAccessibilityIsIgnored() const 89{ 90 AccessibilityObjectInclusion decision = defaultObjectInclusion(); 91 if (decision == IncludeObject) 92 return false; 93 if (decision == IgnoreObject) 94 return true; 95 96 if (!isTableRow()) 97 return AccessibilityRenderObject::computeAccessibilityIsIgnored(); 98 99 return false; 100} 101 102AccessibilityTable* AccessibilityTableRow::parentTable() const 103{ 104 // The parent table might not be the direct ancestor of the row unfortunately. ARIA states that role="grid" should 105 // only have "row" elements, but if not, we still should handle it gracefully by finding the right table. 106 for (AccessibilityObject* parent = parentObject(); parent; parent = parent->parentObject()) { 107 // If this is a table object, but not an accessibility table, we should stop because we don't want to 108 // choose another ancestor table as this row's table. 109 if (parent->isTable()) 110 return parent->isAccessibilityTable() ? toAccessibilityTable(parent) : 0; 111 } 112 113 return 0; 114} 115 116AccessibilityObject* AccessibilityTableRow::headerObject() 117{ 118 if (!m_renderer || !m_renderer->isTableRow()) 119 return 0; 120 121 const auto& rowChildren = children(); 122 if (!rowChildren.size()) 123 return 0; 124 125 // check the first element in the row to see if it is a TH element 126 AccessibilityObject* cell = rowChildren[0].get(); 127 if (!cell->isTableCell()) 128 return 0; 129 130 RenderObject* cellRenderer = toAccessibilityTableCell(cell)->renderer(); 131 if (!cellRenderer) 132 return 0; 133 134 Node* cellNode = cellRenderer->node(); 135 if (!cellNode || !cellNode->hasTagName(thTag)) 136 return 0; 137 138 return cell; 139} 140 141} // namespace WebCore 142