third_party/WebKit/Source/core/html/RadioNodeList.cpp

/*
 * Copyright (c) 2012 Motorola Mobility, 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 MOTOROLA MOBILITY, INC. 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 MOTOROLA MOBILITY, INC. 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 "core/html/RadioNodeList.h"

#include "core/HTMLNames.h"
#include "core/InputTypeNames.h"
#include "core/dom/Element.h"
#include "core/dom/NodeRareData.h"
#include "core/html/HTMLFormElement.h"
#include "core/html/HTMLImageElement.h"
#include "core/html/HTMLInputElement.h"
#include "core/html/HTMLObjectElement.h"

namespace blink {

using namespace HTMLNames;

RadioNodeList::RadioNodeList(ContainerNode& rootNode,
                             const AtomicString& name,
                             CollectionType type)
    : LiveNodeList(rootNode,
                   type,
                   InvalidateForFormControls,
                   isHTMLFormElement(rootNode) ? NodeListRootType::TreeScope
                                               : NodeListRootType::Node),
      m_name(name) {}

RadioNodeList::~RadioNodeList() {}

static inline HTMLInputElement* toRadioButtonInputElement(Element& element) {
  if (!isHTMLInputElement(element))
    return nullptr;
  HTMLInputElement& inputElement = toHTMLInputElement(element);
  if (inputElement.type() != InputTypeNames::radio ||
      inputElement.value().isEmpty())
    return nullptr;
  return &inputElement;
}

String RadioNodeList::value() const {
  if (shouldOnlyMatchImgElements())
    return String();
  unsigned length = this->length();
  for (unsigned i = 0; i < length; ++i) {
    const HTMLInputElement* inputElement = toRadioButtonInputElement(*item(i));
    if (!inputElement || !inputElement->checked())
      continue;
    return inputElement->value();
  }
  return String();
}

void RadioNodeList::setValue(const String& value) {
  if (shouldOnlyMatchImgElements())
    return;
  unsigned length = this->length();
  for (unsigned i = 0; i < length; ++i) {
    HTMLInputElement* inputElement = toRadioButtonInputElement(*item(i));
    if (!inputElement || inputElement->value() != value)
      continue;
    inputElement->setChecked(true);
    return;
  }
}

bool RadioNodeList::matchesByIdOrName(const Element& testElement) const {
  return testElement.getIdAttribute() == m_name ||
         testElement.getNameAttribute() == m_name;
}

bool RadioNodeList::checkElementMatchesRadioNodeListFilter(
    const Element& testElement) const {
  DCHECK(!shouldOnlyMatchImgElements());
  DCHECK(isHTMLObjectElement(testElement) ||
         testElement.isFormControlElement());
  if (isHTMLFormElement(ownerNode())) {
    HTMLFormElement* formElement = toHTMLElement(testElement).formOwner();
    if (!formElement || formElement != ownerNode())
      return false;
  }

  return matchesByIdOrName(testElement);
}

bool RadioNodeList::elementMatches(const Element& element) const {
  if (shouldOnlyMatchImgElements()) {
    if (!isHTMLImageElement(element))
      return false;

    if (toHTMLImageElement(element).formOwner() != ownerNode())
      return false;

    return matchesByIdOrName(element);
  }

  if (!isHTMLObjectElement(element) && !element.isFormControlElement())
    return false;

  if (isHTMLInputElement(element) &&
      toHTMLInputElement(element).type() == InputTypeNames::image)
    return false;

  return checkElementMatchesRadioNodeListFilter(element);
}

}  // namespace blink