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

/*
 * 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 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;
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 */

#include "modules/accessibility/AXImageMapLink.h"

#include "SkMatrix44.h"
#include "core/dom/ElementTraversal.h"
#include "modules/accessibility/AXLayoutObject.h"
#include "modules/accessibility/AXObjectCacheImpl.h"
#include "platform/graphics/Path.h"

namespace blink {

using namespace HTMLNames;

AXImageMapLink::AXImageMapLink(HTMLAreaElement* area,
                               AXObjectCacheImpl& axObjectCache)
    : AXNodeObject(area, axObjectCache) {}

AXImageMapLink::~AXImageMapLink() {}

AXImageMapLink* AXImageMapLink::create(HTMLAreaElement* area,
                                       AXObjectCacheImpl& axObjectCache) {
  return new AXImageMapLink(area, axObjectCache);
}

HTMLMapElement* AXImageMapLink::mapElement() const {
  HTMLAreaElement* area = areaElement();
  if (!area)
    return nullptr;
  return Traversal<HTMLMapElement>::firstAncestor(*area);
}

AXObject* AXImageMapLink::computeParent() const {
  ASSERT(!isDetached());
  if (m_parent)
    return m_parent;

  if (!mapElement())
    return nullptr;

  return axObjectCache().getOrCreate(mapElement()->layoutObject());
}

AccessibilityRole AXImageMapLink::roleValue() const {
  const AtomicString& ariaRole = getAttribute(roleAttr);
  if (!ariaRole.isEmpty())
    return AXObject::ariaRoleToWebCoreRole(ariaRole);

  return LinkRole;
}

bool AXImageMapLink::computeAccessibilityIsIgnored(
    IgnoredReasons* ignoredReasons) const {
  return accessibilityIsIgnoredByDefault(ignoredReasons);
}

Element* AXImageMapLink::actionElement() const {
  return anchorElement();
}

Element* AXImageMapLink::anchorElement() const {
  return getNode() ? toElement(getNode()) : nullptr;
}

KURL AXImageMapLink::url() const {
  if (!areaElement())
    return KURL();

  return areaElement()->href();
}

void AXImageMapLink::getRelativeBounds(
    AXObject** outContainer,
    FloatRect& outBoundsInContainer,
    SkMatrix44& outContainerTransform) const {
  *outContainer = nullptr;
  outBoundsInContainer = FloatRect();
  outContainerTransform.setIdentity();

  HTMLAreaElement* area = areaElement();
  HTMLMapElement* map = mapElement();
  if (!area || !map)
    return;

  LayoutObject* layoutObject;
  if (m_parent && m_parent->isAXLayoutObject())
    layoutObject = toAXLayoutObject(m_parent)->getLayoutObject();
  else
    layoutObject = map->layoutObject();

  if (!layoutObject)
    return;

  outBoundsInContainer = area->getPath(layoutObject).boundingRect();
  *outContainer = axObjectCache().getOrCreate(layoutObject);
}

DEFINE_TRACE(AXImageMapLink) {
  AXNodeObject::trace(visitor);
}

}  // namespace blink