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Diffstat (limited to 'Source/WebCore/accessibility/AccessibilityTableCell.cpp')
| -rw-r--r-- | Source/WebCore/accessibility/AccessibilityTableCell.cpp | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/Source/WebCore/accessibility/AccessibilityTableCell.cpp b/Source/WebCore/accessibility/AccessibilityTableCell.cpp new file mode 100644 index 0000000..7ad6063 --- /dev/null +++ b/Source/WebCore/accessibility/AccessibilityTableCell.cpp @@ -0,0 +1,179 @@ +/* + * Copyright (C) 2008 Apple Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of + * its contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" +#include "AccessibilityTableCell.h" + +#include "AXObjectCache.h" +#include "HTMLNames.h" +#include "RenderObject.h" +#include "RenderTableCell.h" + +using namespace std; + +namespace WebCore { + +using namespace HTMLNames; + +AccessibilityTableCell::AccessibilityTableCell(RenderObject* renderer) + : AccessibilityRenderObject(renderer) +{ +} + +AccessibilityTableCell::~AccessibilityTableCell() +{ +} + +PassRefPtr<AccessibilityTableCell> AccessibilityTableCell::create(RenderObject* renderer) +{ + return adoptRef(new AccessibilityTableCell(renderer)); +} + +bool AccessibilityTableCell::accessibilityIsIgnored() const +{ + AccessibilityObjectInclusion decision = accessibilityIsIgnoredBase(); + if (decision == IncludeObject) + return false; + if (decision == IgnoreObject) + return true; + + if (!isTableCell()) + return AccessibilityRenderObject::accessibilityIsIgnored(); + + return false; +} + +AccessibilityObject* AccessibilityTableCell::parentTable() const +{ + if (!m_renderer || !m_renderer->isTableCell()) + return 0; + + // Do not use getOrCreate. parentTable() can be called while the render tree is being modified + // by javascript, and creating a table element may try to access the render tree while in a bad state. + // By using only get() implies that the AXTable must be created before AXTableCells. This should + // always be the case when AT clients access a table. + // https://bugs.webkit.org/show_bug.cgi?id=42652 + return axObjectCache()->get(toRenderTableCell(m_renderer)->table()); +} + +bool AccessibilityTableCell::isTableCell() const +{ + AccessibilityObject* table = parentTable(); + if (!table || !table->isAccessibilityTable()) + return false; + + return true; +} + +AccessibilityRole AccessibilityTableCell::roleValue() const +{ + if (!isTableCell()) + return AccessibilityRenderObject::roleValue(); + + return CellRole; +} + +void AccessibilityTableCell::rowIndexRange(pair<int, int>& rowRange) +{ + if (!m_renderer || !m_renderer->isTableCell()) + return; + + RenderTableCell* renderCell = toRenderTableCell(m_renderer); + rowRange.first = renderCell->row(); + rowRange.second = renderCell->rowSpan(); + + // since our table might have multiple sections, we have to offset our row appropriately + RenderTableSection* section = renderCell->section(); + RenderTable* table = renderCell->table(); + if (!table || !section) + return; + + RenderTableSection* tableSection = table->header(); + if (!tableSection) + tableSection = table->firstBody(); + + unsigned rowOffset = 0; + while (tableSection) { + if (tableSection == section) + break; + rowOffset += tableSection->numRows(); + tableSection = table->sectionBelow(tableSection, true); + } + + rowRange.first += rowOffset; +} + +void AccessibilityTableCell::columnIndexRange(pair<int, int>& columnRange) +{ + if (!m_renderer || !m_renderer->isTableCell()) + return; + + RenderTableCell* renderCell = toRenderTableCell(m_renderer); + columnRange.first = renderCell->col(); + columnRange.second = renderCell->colSpan(); +} + +AccessibilityObject* AccessibilityTableCell::titleUIElement() const +{ + // Try to find if the first cell in this row is a <th>. If it is, + // then it can act as the title ui element. (This is only in the + // case when the table is not appearing as an AXTable.) + if (isTableCell() || !m_renderer || !m_renderer->isTableCell()) + return 0; + + // Table cells that are th cannot have title ui elements, since by definition + // they are title ui elements + Node* node = m_renderer->node(); + if (node && node->hasTagName(thTag)) + return 0; + + RenderTableCell* renderCell = toRenderTableCell(m_renderer); + + // If this cell is in the first column, there is no need to continue. + int col = renderCell->col(); + if (!col) + return 0; + + int row = renderCell->row(); + + RenderTableSection* section = renderCell->section(); + if (!section) + return 0; + + RenderTableCell* headerCell = section->primaryCellAt(row, 0); + if (!headerCell || headerCell == renderCell) + return 0; + + Node* cellElement = headerCell->node(); + if (!cellElement || !cellElement->hasTagName(thTag)) + return 0; + + return axObjectCache()->getOrCreate(headerCell); +} + +} // namespace WebCore |