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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 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 "AccessibilityTableColumn.h"
#include "AXObjectCache.h"
#include "AccessibilityTableCell.h"
#include "HTMLNames.h"
#include "RenderTable.h"
#include "RenderTableCell.h"
#include "RenderTableSection.h"
using namespace std;
namespace WebCore {
using namespace HTMLNames;
AccessibilityTableColumn::AccessibilityTableColumn()
: m_parentTable(0)
{
}
AccessibilityTableColumn::~AccessibilityTableColumn()
{
}
PassRefPtr<AccessibilityTableColumn> AccessibilityTableColumn::create()
{
return adoptRef(new AccessibilityTableColumn());
}
void AccessibilityTableColumn::setParentTable(AccessibilityTable* table)
{
m_parentTable = table;
clearChildren();
}
IntRect AccessibilityTableColumn::elementRect() const
{
// this will be filled in when addChildren is called
return m_columnRect;
}
IntSize AccessibilityTableColumn::size() const
{
return elementRect().size();
}
const AccessibilityObject::AccessibilityChildrenVector& AccessibilityTableColumn::children()
{
if (!m_haveChildren)
addChildren();
return m_children;
}
AccessibilityObject* AccessibilityTableColumn::headerObject()
{
if (!m_parentTable)
return 0;
RenderObject* renderer = m_parentTable->renderer();
if (!renderer)
return 0;
if (m_parentTable->isAriaTable()) {
AccessibilityChildrenVector rowChildren = children();
unsigned childrenCount = rowChildren.size();
for (unsigned i = 0; i < childrenCount; ++i) {
AccessibilityObject* cell = rowChildren[i].get();
if (cell->ariaRoleAttribute() == ColumnHeaderRole)
return cell;
}
return 0;
}
if (!renderer->isTable())
return 0;
RenderTable* table = toRenderTable(renderer);
AccessibilityObject* headerObject = 0;
// try the <thead> section first. this doesn't require th tags
headerObject = headerObjectForSection(table->header(), false);
if (headerObject)
return headerObject;
// now try for <th> tags in the first body
headerObject = headerObjectForSection(table->firstBody(), true);
return headerObject;
}
AccessibilityObject* AccessibilityTableColumn::headerObjectForSection(RenderTableSection* section, bool thTagRequired)
{
if (!section)
return 0;
int numCols = section->numColumns();
if (m_columnIndex >= numCols)
return 0;
if (!section->numRows())
return 0;
RenderTableCell* cell = 0;
// also account for cells that have a span
for (int testCol = m_columnIndex; testCol >= 0; --testCol) {
RenderTableCell* testCell = section->primaryCellAt(0, testCol);
if (!testCell)
continue;
// we've reached a cell that doesn't even overlap our column
// it can't be our header
if ((testCell->col() + (testCell->colSpan()-1)) < m_columnIndex)
break;
Node* node = testCell->node();
if (!node)
continue;
if (thTagRequired && !node->hasTagName(thTag))
continue;
cell = testCell;
}
if (!cell)
return 0;
return m_parentTable->axObjectCache()->getOrCreate(cell);
}
bool AccessibilityTableColumn::accessibilityIsIgnored() const
{
if (!m_parentTable)
return true;
#if PLATFORM(GTK)
return true;
#endif
return m_parentTable->accessibilityIsIgnored();
}
void AccessibilityTableColumn::addChildren()
{
ASSERT(!m_haveChildren);
m_haveChildren = true;
if (!m_parentTable)
return;
int numRows = m_parentTable->rowCount();
for (int i = 0; i < numRows; i++) {
AccessibilityTableCell* cell = m_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);
m_columnRect.unite(cell->elementRect());
}
}
} // namespace WebCore
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