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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 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 "AccessibilityARIAGridCell.h"
#include "AccessibilityObject.h"
#include "AccessibilityTable.h"
#include "AccessibilityTableRow.h"
#include "HTMLNames.h"
namespace WebCore {
using namespace HTMLNames;
AccessibilityARIAGridCell::AccessibilityARIAGridCell(RenderObject* renderer)
: AccessibilityTableCell(renderer)
{
}
AccessibilityARIAGridCell::~AccessibilityARIAGridCell()
{
}
Ref<AccessibilityARIAGridCell> AccessibilityARIAGridCell::create(RenderObject* renderer)
{
return adoptRef(*new AccessibilityARIAGridCell(renderer));
}
AccessibilityTable* AccessibilityARIAGridCell::parentTable() const
{
// ARIA gridcells may have multiple levels of unignored ancestors that are not the parent table,
// including rows and interactive rowgroups. In addition, poorly-formed grids may contain elements
// which pass the tests for inclusion.
for (AccessibilityObject* parent = parentObjectUnignored(); parent; parent = parent->parentObjectUnignored()) {
if (is<AccessibilityTable>(*parent) && downcast<AccessibilityTable>(*parent).isExposableThroughAccessibility())
return downcast<AccessibilityTable>(parent);
}
return nullptr;
}
void AccessibilityARIAGridCell::rowIndexRange(std::pair<unsigned, unsigned>& rowRange) const
{
AccessibilityObject* parent = parentObjectUnignored();
if (!parent)
return;
if (is<AccessibilityTableRow>(*parent)) {
// We already got a table row, use its API.
rowRange.first = downcast<AccessibilityTableRow>(*parent).rowIndex();
} else if (is<AccessibilityTable>(*parent) && downcast<AccessibilityTable>(*parent).isExposableThroughAccessibility()) {
// We reached the parent table, so we need to inspect its
// children to determine the row index for the cell in it.
unsigned columnCount = downcast<AccessibilityTable>(*parent).columnCount();
if (!columnCount)
return;
const auto& siblings = parent->children();
unsigned childrenSize = siblings.size();
for (unsigned k = 0; k < childrenSize; ++k) {
if (siblings[k].get() == this) {
rowRange.first = k / columnCount;
break;
}
}
}
// ARIA 1.1, aria-rowspan attribute is intended for cells and gridcells which are not contained in a native table.
// So we should check for that attribute here.
rowRange.second = ariaRowSpanWithRowIndex(rowRange.first);
}
unsigned AccessibilityARIAGridCell::ariaRowSpanWithRowIndex(unsigned rowIndex) const
{
unsigned rowSpan = AccessibilityTableCell::ariaRowSpan();
AccessibilityObject* parent = parentObjectUnignored();
if (!parent)
return 1;
// Setting the value to 0 indicates that the cell or gridcell is to span all the remaining rows in the row group.
if (!rowSpan) {
// rowSpan defaults to 1.
rowSpan = 1;
if (AccessibilityObject* parentRowGroup = this->parentRowGroup()) {
// If the row group is the parent table, we use total row count to calculate the span.
if (is<AccessibilityTable>(*parentRowGroup))
rowSpan = downcast<AccessibilityTable>(*parentRowGroup).rowCount() - rowIndex;
// Otherwise, we have to get the index for the current row within the parent row group.
else if (is<AccessibilityTableRow>(*parent)) {
const auto& siblings = parentRowGroup->children();
unsigned rowCount = siblings.size();
for (unsigned k = 0; k < rowCount; ++k) {
if (siblings[k].get() == parent) {
rowSpan = rowCount - k;
break;
}
}
}
}
}
return rowSpan;
}
void AccessibilityARIAGridCell::columnIndexRange(std::pair<unsigned, unsigned>& columnRange) const
{
AccessibilityObject* parent = parentObjectUnignored();
if (!parent)
return;
if (!is<AccessibilityTableRow>(*parent)
&& !(is<AccessibilityTable>(*parent) && downcast<AccessibilityTable>(*parent).isExposableThroughAccessibility()))
return;
const AccessibilityChildrenVector& siblings = parent->children();
unsigned childrenSize = siblings.size();
for (unsigned k = 0; k < childrenSize; ++k) {
if (siblings[k].get() == this) {
columnRange.first = k;
break;
}
}
// ARIA 1.1, aria-colspan attribute is intended for cells and gridcells which are not contained in a native table.
// So we should check for that attribute here.
columnRange.second = ariaColumnSpan();
}
AccessibilityObject* AccessibilityARIAGridCell::parentRowGroup() const
{
for (AccessibilityObject* parent = parentObject(); parent; parent = parent->parentObject()) {
if (parent->hasTagName(theadTag) || parent->hasTagName(tbodyTag) || parent->hasTagName(tfootTag) || parent->roleValue() == RowGroupRole)
return parent;
}
// If there's no row group found, we use the parent table as the row group.
return parentTable();
}
} // namespace WebCore
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