/*

 * 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 "AccessibilityARIAGridRow.h"

#include "AccessibilityObject.h"

#include "AccessibilityTable.h"

#include "RenderObject.h"

using namespace std;

namespace WebCore {

AccessibilityARIAGridRow::AccessibilityARIAGridRow(RenderObject* renderer)

    : AccessibilityTableRow(renderer)

{

}

AccessibilityARIAGridRow::~AccessibilityARIAGridRow()

{

}

PassRefPtr<AccessibilityARIAGridRow> AccessibilityARIAGridRow::create(RenderObject* renderer)

{

    return adoptRef(new AccessibilityARIAGridRow(renderer));

}

bool AccessibilityARIAGridRow::isARIATreeGridRow() const

{

    AccessibilityObject* parent = parentTable();

    if (!parent)

        return false;

    return parent->ariaRoleAttribute() == TreeGridRole;

}

void AccessibilityARIAGridRow::disclosedRows(AccessibilityChildrenVector& disclosedRows)

{

    // The contiguous disclosed rows will be the rows in the table that 

    // have an aria-level of plus 1 from this row.

    AccessibilityObject* parent = parentObjectUnignored();

    if (!parent || !parent->isDataTable())

        return;

    // Search for rows that match the correct level. 

    // Only take the subsequent rows from this one that are +1 from this row's level.

    int index = rowIndex();

    if (index < 0)

        return;

    unsigned level = hierarchicalLevel();

    AccessibilityChildrenVector& allRows = static_cast<AccessibilityTable*>(parent)->rows();

    int rowCount = allRows.size();

    for (int k = index + 1; k < rowCount; ++k) {

        AccessibilityObject* row = allRows[k].get();

        // Stop at the first row that doesn't match the correct level.

        if (row->hierarchicalLevel() != level + 1)

            break;

        disclosedRows.append(row);

    }

}

AccessibilityObject* AccessibilityARIAGridRow::disclosedByRow() const

{

    // The row that discloses this one is the row in the table

    // that is aria-level subtract 1 from this row.

    AccessibilityObject* parent = parentObjectUnignored();

    if (!parent || !parent->isDataTable())

        return 0;

    // If the level is 1 or less, than nothing discloses this row.

    unsigned level = hierarchicalLevel();

    if (level <= 1)

        return 0;

    // Search for the previous row that matches the correct level.

    int index = rowIndex();

    AccessibilityChildrenVector& allRows = static_cast<AccessibilityTable*>(parent)->rows();

    int rowCount = allRows.size();

    if (index >= rowCount)

        return 0;

    for (int k = index - 1; k >= 0; --k) {

        AccessibilityObject* row = allRows[k].get();

        if (row->hierarchicalLevel() == level - 1)

            return row;

    }

    return 0;

}

AccessibilityObject* AccessibilityARIAGridRow::parentTable() const

{

    AccessibilityObject* parent = parentObjectUnignored();

    if (!parent->isDataTable())

        return 0;

    return parent;

}

AccessibilityObject* AccessibilityARIAGridRow::headerObject()

{

    AccessibilityChildrenVector rowChildren = children();

    unsigned childrenCount = rowChildren.size();

    for (unsigned i = 0; i < childrenCount; ++i) {

        AccessibilityObject* cell = rowChildren[i].get();

        if (cell->ariaRoleAttribute() == RowHeaderRole)

            return cell;

    }

    return 0;

}

} // namespace WebCore