text: /*
   * Copyright (C) 2010 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.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 INC. OR
   * 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 "modules/accessibility/AXMenuListOption.h"
  
  #include "SkMatrix44.h"
  #include "modules/accessibility/AXMenuListPopup.h"
  #include "modules/accessibility/AXObjectCacheImpl.h"
  
  namespace blink {
  
  using namespace HTMLNames;
  
  AXMenuListOption::AXMenuListOption(HTMLOptionElement* element,
                                     AXObjectCacheImpl& axObjectCache)
      : AXMockObject(axObjectCache), m_element(element) {}
  
  AXMenuListOption::~AXMenuListOption() {
    ASSERT(!m_element);
  }
  
  void AXMenuListOption::detach() {
    m_element = nullptr;
    AXMockObject::detach();
  }
  
  AccessibilityRole AXMenuListOption::roleValue() const {
    const AtomicString& ariaRole = getAttribute(roleAttr);
    if (ariaRole.isEmpty())
      return MenuListOptionRole;
  
    AccessibilityRole role = ariaRoleToWebCoreRole(ariaRole);
    if (role)
      return role;
    return MenuListOptionRole;
  }
  
  Element* AXMenuListOption::actionElement() const {
    return m_element;
  }
  
  bool AXMenuListOption::isEnabled() const {
    // isDisabledFormControl() returns true if the parent <select> element is
    // disabled, which we don't want.
    return m_element && !m_element->ownElementDisabled();
  }
  
  bool AXMenuListOption::isVisible() const {
    if (!m_parent)
      return false;
  
    // In a single-option select with the popup collapsed, only the selected
    // item is considered visible.
    return !m_parent->isOffScreen() || isSelected();
  }
  
  bool AXMenuListOption::isOffScreen() const {
    // Invisible list options are considered to be offscreen.
    return !isVisible();
  }
  
  bool AXMenuListOption::isSelected() const {
    AXMenuListPopup* parent = static_cast<AXMenuListPopup*>(parentObject());
    if (parent && !parent->isOffScreen())
      return parent->activeDescendant() == this;
    return m_element && m_element->selected();
  }
  
  void AXMenuListOption::setSelected(bool b) {
    if (!m_element || !canSetSelectedAttribute())
      return;
  
    m_element->setSelected(b);
  }
  
  bool AXMenuListOption::canSetSelectedAttribute() const {
    return isEnabled();
  }
  
  bool AXMenuListOption::computeAccessibilityIsIgnored(
      IgnoredReasons* ignoredReasons) const {
    return accessibilityIsIgnoredByDefault(ignoredReasons);
  }
  
  void AXMenuListOption::getRelativeBounds(
      AXObject** outContainer,
      FloatRect& outBoundsInContainer,
      SkMatrix44& outContainerTransform) const {
    *outContainer = nullptr;
    outBoundsInContainer = FloatRect();
    outContainerTransform.setIdentity();
  
    AXObject* parent = parentObject();
    if (!parent)
      return;
    ASSERT(parent->isMenuListPopup());
  
    AXObject* grandparent = parent->parentObject();
    if (!grandparent)
      return;
    ASSERT(grandparent->isMenuList());
    grandparent->getRelativeBounds(outContainer, outBoundsInContainer,
                                   outContainerTransform);
  }
  
  String AXMenuListOption::textAlternative(bool recursive,
                                           bool inAriaLabelledByTraversal,
                                           AXObjectSet& visited,
                                           AXNameFrom& nameFrom,
                                           AXRelatedObjectVector* relatedObjects,
                                           NameSources* nameSources) const {
    // If nameSources is non-null, relatedObjects is used in filling it in, so it
    // must be non-null as well.
    if (nameSources)
      ASSERT(relatedObjects);
  
    if (!getNode())
      return String();
  
    bool foundTextAlternative = false;
    String textAlternative = ariaTextAlternative(
        recursive, inAriaLabelledByTraversal, visited, nameFrom, relatedObjects,
        nameSources, &foundTextAlternative);
    if (foundTextAlternative && !nameSources)
      return textAlternative;
  
    nameFrom = AXNameFromContents;
    textAlternative = m_element->displayLabel();
    if (nameSources) {
      nameSources->append(NameSource(foundTextAlternative));
      nameSources->last().type = nameFrom;
      nameSources->last().text = textAlternative;
      foundTextAlternative = true;
    }
  
    return textAlternative;
  }
  
  DEFINE_TRACE(AXMenuListOption) {
    visitor->trace(m_element);
    AXMockObject::trace(visitor);
  }
  
  }  // namespace blink
  