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| 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 "core/accessibility/AXTableCell.h" | |
| 31 | |
| 32 #include "core/accessibility/AXObjectCacheImpl.h" | |
| 33 #include "core/rendering/RenderTableCell.h" | |
| 34 | |
| 35 | |
| 36 namespace blink { | |
| 37 | |
| 38 using namespace HTMLNames; | |
| 39 | |
| 40 AXTableCell::AXTableCell(RenderObject* renderer) | |
| 41 : AXRenderObject(renderer) | |
| 42 { | |
| 43 } | |
| 44 | |
| 45 AXTableCell::~AXTableCell() | |
| 46 { | |
| 47 } | |
| 48 | |
| 49 PassRefPtr<AXTableCell> AXTableCell::create(RenderObject* renderer) | |
| 50 { | |
| 51 return adoptRef(new AXTableCell(renderer)); | |
| 52 } | |
| 53 | |
| 54 bool AXTableCell::computeAccessibilityIsIgnored() const | |
| 55 { | |
| 56 AXObjectInclusion decision = defaultObjectInclusion(); | |
| 57 if (decision == IncludeObject) | |
| 58 return false; | |
| 59 if (decision == IgnoreObject) | |
| 60 return true; | |
| 61 | |
| 62 if (!isTableCell()) | |
| 63 return AXRenderObject::computeAccessibilityIsIgnored(); | |
| 64 | |
| 65 return false; | |
| 66 } | |
| 67 | |
| 68 AXObject* AXTableCell::parentTable() const | |
| 69 { | |
| 70 if (!m_renderer || !m_renderer->isTableCell()) | |
| 71 return 0; | |
| 72 | |
| 73 // If the document no longer exists, we might not have an axObjectCache. | |
| 74 if (!axObjectCache()) | |
| 75 return 0; | |
| 76 | |
| 77 // Do not use getOrCreate. parentTable() can be called while the render tree
is being modified | |
| 78 // by javascript, and creating a table element may try to access the render
tree while in a bad state. | |
| 79 // By using only get() implies that the AXTable must be created before AXTab
leCells. This should | |
| 80 // always be the case when AT clients access a table. | |
| 81 // https://bugs.webkit.org/show_bug.cgi?id=42652 | |
| 82 return axObjectCache()->get(toRenderTableCell(m_renderer)->table()); | |
| 83 } | |
| 84 | |
| 85 bool AXTableCell::isTableCell() const | |
| 86 { | |
| 87 AXObject* parent = parentObjectUnignored(); | |
| 88 if (!parent || !parent->isTableRow()) | |
| 89 return false; | |
| 90 | |
| 91 return true; | |
| 92 } | |
| 93 | |
| 94 AccessibilityRole AXTableCell::determineAccessibilityRole() | |
| 95 { | |
| 96 if (!isTableCell()) | |
| 97 return AXRenderObject::determineAccessibilityRole(); | |
| 98 | |
| 99 return CellRole; | |
| 100 } | |
| 101 | |
| 102 void AXTableCell::rowIndexRange(pair<unsigned, unsigned>& rowRange) | |
| 103 { | |
| 104 if (!m_renderer || !m_renderer->isTableCell()) | |
| 105 return; | |
| 106 | |
| 107 RenderTableCell* renderCell = toRenderTableCell(m_renderer); | |
| 108 rowRange.first = renderCell->rowIndex(); | |
| 109 rowRange.second = renderCell->rowSpan(); | |
| 110 | |
| 111 // since our table might have multiple sections, we have to offset our row a
ppropriately | |
| 112 RenderTableSection* section = renderCell->section(); | |
| 113 RenderTable* table = renderCell->table(); | |
| 114 if (!table || !section) | |
| 115 return; | |
| 116 | |
| 117 RenderTableSection* tableSection = table->topSection(); | |
| 118 unsigned rowOffset = 0; | |
| 119 while (tableSection) { | |
| 120 if (tableSection == section) | |
| 121 break; | |
| 122 rowOffset += tableSection->numRows(); | |
| 123 tableSection = table->sectionBelow(tableSection, SkipEmptySections); | |
| 124 } | |
| 125 | |
| 126 rowRange.first += rowOffset; | |
| 127 } | |
| 128 | |
| 129 void AXTableCell::columnIndexRange(pair<unsigned, unsigned>& columnRange) | |
| 130 { | |
| 131 if (!m_renderer || !m_renderer->isTableCell()) | |
| 132 return; | |
| 133 | |
| 134 RenderTableCell* renderCell = toRenderTableCell(m_renderer); | |
| 135 columnRange.first = renderCell->col(); | |
| 136 columnRange.second = renderCell->colSpan(); | |
| 137 } | |
| 138 | |
| 139 AXObject* AXTableCell::titleUIElement() const | |
| 140 { | |
| 141 // Try to find if the first cell in this row is a <th>. If it is, | |
| 142 // then it can act as the title ui element. (This is only in the | |
| 143 // case when the table is not appearing as an AXTable.) | |
| 144 if (isTableCell() || !m_renderer || !m_renderer->isTableCell()) | |
| 145 return 0; | |
| 146 | |
| 147 // Table cells that are th cannot have title ui elements, since by definitio
n | |
| 148 // they are title ui elements | |
| 149 Node* node = m_renderer->node(); | |
| 150 if (node && node->hasTagName(thTag)) | |
| 151 return 0; | |
| 152 | |
| 153 RenderTableCell* renderCell = toRenderTableCell(m_renderer); | |
| 154 | |
| 155 // If this cell is in the first column, there is no need to continue. | |
| 156 int col = renderCell->col(); | |
| 157 if (!col) | |
| 158 return 0; | |
| 159 | |
| 160 int row = renderCell->rowIndex(); | |
| 161 | |
| 162 RenderTableSection* section = renderCell->section(); | |
| 163 if (!section) | |
| 164 return 0; | |
| 165 | |
| 166 RenderTableCell* headerCell = section->primaryCellAt(row, 0); | |
| 167 if (!headerCell || headerCell == renderCell) | |
| 168 return 0; | |
| 169 | |
| 170 Node* cellElement = headerCell->node(); | |
| 171 if (!cellElement || !cellElement->hasTagName(thTag)) | |
| 172 return 0; | |
| 173 | |
| 174 return axObjectCache()->getOrCreate(headerCell); | |
| 175 } | |
| 176 | |
| 177 } // namespace blink | |
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Chromium Code Reviews
Issue 713933002:
Create Source/modules/accessibility/ and move most of core/accessibility/* into it (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master