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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 "AccessibilityTableRow.h"
#include "AXObjectCache.h"
#include "AccessibilityTable.h"
#include "AccessibilityTableCell.h"
#include "HTMLNames.h"
#include "RenderObject.h"
namespace WebCore {
using namespace HTMLNames;
AccessibilityTableRow::AccessibilityTableRow(AXID axID, RenderObject& renderer)
: AccessibilityRenderObject(axID, renderer)
{
}
AccessibilityTableRow::AccessibilityTableRow(AXID axID, Node& node)
: AccessibilityRenderObject(axID, node)
{
}
AccessibilityTableRow::~AccessibilityTableRow() = default;
Ref<AccessibilityTableRow> AccessibilityTableRow::create(AXID axID, RenderObject& renderer)
{
return adoptRef(*new AccessibilityTableRow(axID, renderer));
}
Ref<AccessibilityTableRow> AccessibilityTableRow::create(AXID axID, Node& node)
{
return adoptRef(*new AccessibilityTableRow(axID, node));
}
AccessibilityRole AccessibilityTableRow::determineAccessibilityRole()
{
if (!isTableRow())
return AccessibilityRenderObject::determineAccessibilityRole();
if ((m_ariaRole = determineAriaRoleAttribute()) != AccessibilityRole::Unknown)
return m_ariaRole;
return AccessibilityRole::Row;
}
bool AccessibilityTableRow::isTableRow() const
{
auto* table = parentTable();
return table && table->isExposable();
}
AccessibilityObject* AccessibilityTableRow::observableObject() const
{
// This allows the table to be the one who sends notifications about tables.
return parentTable();
}
bool AccessibilityTableRow::computeIsIgnored() const
{
AccessibilityObjectInclusion decision = defaultObjectInclusion();
if (decision == AccessibilityObjectInclusion::IncludeObject)
return false;
if (decision == AccessibilityObjectInclusion::IgnoreObject)
return true;
if (!isTableRow())
return AccessibilityRenderObject::computeIsIgnored();
return isRenderHidden() || ignoredFromPresentationalRole();
}
AccessibilityTable* AccessibilityTableRow::parentTable() const
{
// The parent table might not be the direct ancestor of the row unfortunately. ARIA states that role="grid" should
// only have "row" elements, but if not, we still should handle it gracefully by finding the right table.
for (RefPtr parent = parentObject(); parent; parent = parent->parentObject()) {
// If this is a non-anonymous table object, but not an accessibility table, we should stop because we don't want to
// choose another ancestor table as this row's table.
if (auto* parentTable = dynamicDowncast<AccessibilityTable>(*parent)) {
if (parentTable->isExposable())
return parentTable;
if (parentTable->node())
break;
}
}
return nullptr;
}
void AccessibilityTableRow::setRowIndex(unsigned rowIndex)
{
if (m_rowIndex == rowIndex)
return;
m_rowIndex = rowIndex;
#if ENABLE(ACCESSIBILITY_ISOLATED_TREE)
if (auto* cache = axObjectCache())
cache->rowIndexChanged(*this);
#endif
}
AccessibilityObject* AccessibilityTableRow::rowHeader()
{
const auto& rowChildren = unignoredChildren();
if (rowChildren.isEmpty())
return nullptr;
Ref firstCell = rowChildren[0].get();
if (!firstCell->node() || !firstCell->node()->hasTagName(thTag))
return nullptr;
// Verify that the row header is not part of an entire row of headers.
// In that case, it is unlikely this is a row header.
for (const auto& child : rowChildren) {
// We found a non-header cell, so this is not an entire row of headers -- return the original header cell.
if (child->node() && !child->node()->hasTagName(thTag))
return &downcast<AccessibilityObject>(firstCell.get());
}
return nullptr;
}
void AccessibilityTableRow::addChildren()
{
// If the element specifies its cells through aria-owns, return that first.
auto ownedObjects = this->ownedObjects();
if (ownedObjects.size()) {
for (auto& object : ownedObjects)
addChild(downcast<AccessibilityObject>(object.get()), DescendIfIgnored::No);
m_childrenInitialized = true;
m_subtreeDirty = false;
}
else
AccessibilityRenderObject::addChildren();
// "ARIA 1.1, If the set of columns which is present in the DOM is contiguous, and if there are no cells which span more than one row or
// column in that set, then authors may place aria-colindex on each row, setting the value to the index of the first column of the set."
// Update child cells' axColIndex if there's an aria-colindex value set for the row. So the cell doesn't have to go through the siblings
// to calculate the index.
int colIndex = axColumnIndex();
if (colIndex == -1)
return;
unsigned index = 0;
for (const auto& cell : unignoredChildren()) {
if (auto* tableCell = dynamicDowncast<AccessibilityTableCell>(cell.get()))
tableCell->setAXColIndexFromRow(colIndex + index);
index++;
}
}
int AccessibilityTableRow::axColumnIndex() const
{
int value = getIntegralAttribute(aria_colindexAttr);
return value >= 1 ? value : -1;
}
int AccessibilityTableRow::axRowIndex() const
{
int value = getIntegralAttribute(aria_rowindexAttr);
return value >= 1 ? value : -1;
}
} // namespace WebCore
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