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/*
* 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 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 "AccessibilityTableColumn.h"
#include "AXObjectCache.h"
#include "AccessibilityTableCell.h"
#include "HTMLElement.h"
#include "HTMLNames.h"
#include "RenderTable.h"
#include "RenderTableCell.h"
#include "RenderTableSection.h"
namespace WebCore {
using namespace HTMLNames;
AccessibilityTableColumn::AccessibilityTableColumn()
{
}
AccessibilityTableColumn::~AccessibilityTableColumn()
{
}
Ref<AccessibilityTableColumn> AccessibilityTableColumn::create()
{
return adoptRef(*new AccessibilityTableColumn());
}
void AccessibilityTableColumn::setParent(AccessibilityObject* parent)
{
AccessibilityMockObject::setParent(parent);
clearChildren();
}
LayoutRect AccessibilityTableColumn::elementRect() const
{
// This used to be cached during the call to addChildren(), but calling elementRect()
// can invalidate elements, so its better to ask for this on demand.
LayoutRect columnRect;
AccessibilityChildrenVector childrenCopy = m_children;
for (const auto& cell : childrenCopy)
columnRect.unite(cell->elementRect());
return columnRect;
}
AccessibilityObject* AccessibilityTableColumn::headerObject()
{
if (!m_parent)
return nullptr;
RenderObject* renderer = m_parent->renderer();
if (!renderer)
return nullptr;
if (!is<AccessibilityTable>(*m_parent))
return nullptr;
auto& parentTable = downcast<AccessibilityTable>(*m_parent);
if (!parentTable.isExposableThroughAccessibility())
return nullptr;
if (parentTable.isAriaTable()) {
for (const auto& cell : children()) {
if (cell->ariaRoleAttribute() == ColumnHeaderRole)
return cell.get();
}
return nullptr;
}
if (!is<RenderTable>(*renderer))
return nullptr;
RenderTable& table = downcast<RenderTable>(*renderer);
// try the <thead> section first. this doesn't require th tags
if (auto* headerObject = headerObjectForSection(table.header(), false))
return headerObject;
RenderTableSection* bodySection = table.firstBody();
while (bodySection && bodySection->isAnonymous())
bodySection = table.sectionBelow(bodySection, SkipEmptySections);
// now try for <th> tags in the first body. If the first body is
return headerObjectForSection(bodySection, true);
}
AccessibilityObject* AccessibilityTableColumn::headerObjectForSection(RenderTableSection* section, bool thTagRequired)
{
if (!section)
return nullptr;
unsigned numCols = section->numColumns();
if (m_columnIndex >= numCols)
return nullptr;
if (!section->numRows())
return nullptr;
RenderTableCell* cell = nullptr;
// also account for cells that have a span
for (int testCol = m_columnIndex; testCol >= 0; --testCol) {
// Run down the rows in case initial rows are invalid (like when a <caption> is used).
unsigned rowCount = section->numRows();
for (unsigned testRow = 0; testRow < rowCount; testRow++) {
RenderTableCell* testCell = section->primaryCellAt(testRow, testCol);
// No cell at this index, keep checking more rows and columns.
if (!testCell)
continue;
// If we've reached a cell that doesn't even overlap our column it can't be the header.
if ((testCell->col() + (testCell->colSpan()-1)) < m_columnIndex)
break;
// If this does not have an element (like a <caption>) then check the next row
if (!testCell->element())
continue;
// If th is required, but we found an element that doesn't have a th tag, we can stop looking.
if (thTagRequired && !testCell->element()->hasTagName(thTag))
break;
cell = testCell;
break;
}
}
if (!cell)
return nullptr;
return axObjectCache()->getOrCreate(cell);
}
bool AccessibilityTableColumn::computeAccessibilityIsIgnored() const
{
if (!m_parent)
return true;
#if PLATFORM(IOS) || PLATFORM(GTK) || PLATFORM(EFL)
return true;
#endif
return m_parent->accessibilityIsIgnored();
}
void AccessibilityTableColumn::addChildren()
{
ASSERT(!m_haveChildren);
m_haveChildren = true;
if (!is<AccessibilityTable>(m_parent))
return;
auto& parentTable = downcast<AccessibilityTable>(*m_parent);
if (!parentTable.isExposableThroughAccessibility())
return;
int numRows = parentTable.rowCount();
for (int i = 0; i < numRows; ++i) {
AccessibilityTableCell* cell = parentTable.cellForColumnAndRow(m_columnIndex, i);
if (!cell)
continue;
// make sure the last one isn't the same as this one (rowspan cells)
if (m_children.size() > 0 && m_children.last() == cell)
continue;
m_children.append(cell);
}
}
} // namespace WebCore
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