third_party/WebKit/Source/modules/accessibility/AXTableRow.cpp

/*
 * Copyright (C) 2008 Apple Inc. All rights reserved.
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 *     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
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#include "modules/accessibility/AXTableRow.h"

#include "core/layout/LayoutObject.h"
#include "modules/accessibility/AXObjectCacheImpl.h"
#include "modules/accessibility/AXTableCell.h"

namespace blink {

using namespace HTMLNames;

AXTableRow::AXTableRow(LayoutObject* layoutObject,
                       AXObjectCacheImpl& axObjectCache)
    : AXLayoutObject(layoutObject, axObjectCache) {}

AXTableRow::~AXTableRow() {}

AXTableRow* AXTableRow::create(LayoutObject* layoutObject,
                               AXObjectCacheImpl& axObjectCache) {
  return new AXTableRow(layoutObject, axObjectCache);
}

void AXTableRow::addChildren() {
  AXLayoutObject::addChildren();

  // A row is allowed to have a column index, indicating the index of the
  // first cell in that row, and each subsequent cell gets the next index.
  int colIndex = ariaColumnIndex();
  if (!colIndex)
    return;

  unsigned index = 0;
  for (const auto& cell : children()) {
    if (cell->isTableCell())
      toAXTableCell(cell.get())->setARIAColIndexFromRow(colIndex + index);
    index++;
  }
}

AccessibilityRole AXTableRow::determineAccessibilityRole() {
  if (!isTableRow())
    return AXLayoutObject::determineAccessibilityRole();

  if ((m_ariaRole = determineAriaRoleAttribute()) != UnknownRole)
    return m_ariaRole;

  return RowRole;
}

bool AXTableRow::isTableRow() const {
  AXObject* table = parentTable();
  if (!table || !table->isAXTable())
    return false;

  return true;
}

bool AXTableRow::computeAccessibilityIsIgnored(
    IgnoredReasons* ignoredReasons) const {
  AXObjectInclusion decision = defaultObjectInclusion(ignoredReasons);
  if (decision == IncludeObject)
    return false;
  if (decision == IgnoreObject)
    return true;

  if (!isTableRow())
    return AXLayoutObject::computeAccessibilityIsIgnored(ignoredReasons);

  return false;
}

AXObject* AXTableRow::parentTable() const {
  AXObject* parent = parentObjectUnignored();
  if (!parent || !parent->isAXTable())
    return 0;

  return parent;
}

AXObject* AXTableRow::headerObject() {
  AXObjectVector headers;
  headerObjectsForRow(headers);
  if (!headers.size())
    return 0;

  return headers[0].get();
}

unsigned AXTableRow::ariaColumnIndex() const {
  const AtomicString& colIndexValue = getAttribute(aria_colindexAttr);
  if (colIndexValue.toInt() >= 1)
    return colIndexValue.toInt();

  return 0;
}

unsigned AXTableRow::ariaRowIndex() const {
  const AtomicString& rowIndexValue = getAttribute(aria_rowindexAttr);
  if (rowIndexValue.toInt() >= 1)
    return rowIndexValue.toInt();

  return 0;
}

void AXTableRow::headerObjectsForRow(AXObjectVector& headers) {
  if (!m_layoutObject || !m_layoutObject->isTableRow())
    return;

  for (const auto& cell : children()) {
    if (!cell->isTableCell())
      continue;

    if (toAXTableCell(cell.get())->scanToDecideHeaderRole() == RowHeaderRole)
      headers.append(cell);
  }
}

}  // namespace blink