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/*
* Copyright (C) 2009 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 "AccessibilityARIAGrid.h"
#include "AXObjectCache.h"
#include "AccessibilityTableCell.h"
#include "AccessibilityTableColumn.h"
#include "AccessibilityTableHeaderContainer.h"
#include "AccessibilityTableRow.h"
#include "RenderObject.h"
using namespace std;
namespace WebCore {
AccessibilityARIAGrid::AccessibilityARIAGrid(RenderObject* renderer)
: AccessibilityTable(renderer)
{
}
AccessibilityARIAGrid::~AccessibilityARIAGrid()
{
}
void AccessibilityARIAGrid::init()
{
AccessibilityTable::init();
#if ACCESSIBILITY_TABLES
m_isAccessibilityTable = true;
#else
m_isAccessibilityTable = false;
#endif
}
PassRefPtr<AccessibilityARIAGrid> AccessibilityARIAGrid::create(RenderObject* renderer)
{
AccessibilityARIAGrid* obj = new AccessibilityARIAGrid(renderer);
obj->init();
return adoptRef(obj);
}
bool AccessibilityARIAGrid::addTableCellChild(AccessibilityObject* child, HashSet<AccessibilityObject*>& appendedRows, unsigned& columnCount)
{
if (!child || !child->isTableRow() || child->ariaRoleAttribute() != RowRole)
return false;
AccessibilityTableRow* row = static_cast<AccessibilityTableRow*>(child);
if (appendedRows.contains(row))
return false;
// store the maximum number of columns
unsigned rowCellCount = row->children().size();
if (rowCellCount > columnCount)
columnCount = rowCellCount;
row->setRowIndex((int)m_rows.size());
m_rows.append(row);
// Try adding the row if it's not ignoring accessibility,
// otherwise add its children (the cells) as the grid's children.
if (!row->accessibilityIsIgnored())
m_children.append(row);
else
m_children.append(row->children());
appendedRows.add(row);
return true;
}
void AccessibilityARIAGrid::addChildren()
{
ASSERT(!m_haveChildren);
if (!isAccessibilityTable()) {
AccessibilityRenderObject::addChildren();
return;
}
m_haveChildren = true;
if (!m_renderer)
return;
AXObjectCache* axCache = m_renderer->document()->axObjectCache();
// add only rows that are labeled as aria rows
HashSet<AccessibilityObject*> appendedRows;
unsigned columnCount = 0;
for (RefPtr<AccessibilityObject> child = firstChild(); child; child = child->nextSibling()) {
if (!addTableCellChild(child.get(), appendedRows, columnCount)) {
// in case the render tree doesn't match the expected ARIA hierarchy, look at the children
if (!child->hasChildren())
child->addChildren();
// The children of this non-row will contain all non-ignored elements (recursing to find them).
// This allows the table to dive arbitrarily deep to find the rows.
AccessibilityChildrenVector children = child->children();
size_t length = children.size();
for (size_t i = 0; i < length; ++i)
addTableCellChild(children[i].get(), appendedRows, columnCount);
}
}
// make the columns based on the number of columns in the first body
for (unsigned i = 0; i < columnCount; ++i) {
AccessibilityTableColumn* column = static_cast<AccessibilityTableColumn*>(axCache->getOrCreate(ColumnRole));
column->setColumnIndex((int)i);
column->setParent(this);
m_columns.append(column);
if (!column->accessibilityIsIgnored())
m_children.append(column);
}
AccessibilityObject* headerContainerObject = headerContainer();
if (headerContainerObject && !headerContainerObject->accessibilityIsIgnored())
m_children.append(headerContainerObject);
}
AccessibilityTableCell* AccessibilityARIAGrid::cellForColumnAndRow(unsigned column, unsigned row)
{
if (!m_renderer)
return 0;
updateChildrenIfNecessary();
if (column >= columnCount() || row >= rowCount())
return 0;
int intRow = (int)row;
int intColumn = (int)column;
pair<int, int> columnRange;
pair<int, int> rowRange;
// Iterate backwards through the rows in case the desired cell has a rowspan and exists
// in a previous row.
for (; intRow >= 0; --intRow) {
AccessibilityObject* tableRow = m_rows[intRow].get();
if (!tableRow)
continue;
AccessibilityChildrenVector children = tableRow->children();
unsigned childrenLength = children.size();
// Since some cells may have colspans, we have to check the actual range of each
// cell to determine which is the right one.
for (unsigned k = 0; k < childrenLength; ++k) {
AccessibilityObject* child = children[k].get();
if (!child->isTableCell())
continue;
AccessibilityTableCell* tableCellChild = static_cast<AccessibilityTableCell*>(child);
tableCellChild->columnIndexRange(columnRange);
tableCellChild->rowIndexRange(rowRange);
if ((intColumn >= columnRange.first && intColumn < (columnRange.first + columnRange.second))
&& (intRow >= rowRange.first && intRow < (rowRange.first + rowRange.second)))
return tableCellChild;
}
}
return 0;
}
} // namespace WebCore
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