/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
 * Copyright (C) 2011 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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#include "core/html/forms/CheckboxInputType.h"

#include "core/events/KeyboardEvent.h"
#include "core/html/forms/HTMLInputElement.h"
#include "core/input_type_names.h"
#include "platform/text/PlatformLocale.h"

namespace blink {

InputType* CheckboxInputType::Create(HTMLInputElement& element) {
  return new CheckboxInputType(element);
}

const AtomicString& CheckboxInputType::FormControlType() const {
  return InputTypeNames::checkbox;
}

bool CheckboxInputType::ValueMissing(const String&) const {
  return GetElement().IsRequired() && !GetElement().checked();
}

String CheckboxInputType::ValueMissingText() const {
  return GetLocale().QueryString(
      WebLocalizedString::kValidationValueMissingForCheckbox);
}

void CheckboxInputType::HandleKeyupEvent(KeyboardEvent* event) {
  const String& key = event->key();
  if (key != " ")
    return;
  DispatchSimulatedClickIfActive(event);
}

ClickHandlingState* CheckboxInputType::WillDispatchClick() {
  // An event handler can use preventDefault or "return false" to reverse the
  // checking we do here.  The ClickHandlingState object contains what we need
  // to undo what we did here in didDispatchClick.

  ClickHandlingState* state = new ClickHandlingState;

  state->checked = GetElement().checked();
  state->indeterminate = GetElement().indeterminate();

  if (state->indeterminate)
    GetElement().setIndeterminate(false);

  GetElement().setChecked(!state->checked, kDispatchChangeEvent);
  is_in_click_handler_ = true;
  return state;
}

void CheckboxInputType::DidDispatchClick(Event* event,
                                         const ClickHandlingState& state) {
  if (event->defaultPrevented() || event->DefaultHandled()) {
    GetElement().setIndeterminate(state.indeterminate);
    GetElement().setChecked(state.checked);
  } else {
    GetElement().DispatchInputAndChangeEventIfNeeded();
  }
  is_in_click_handler_ = false;
  // The work we did in willDispatchClick was default handling.
  event->SetDefaultHandled();
}

bool CheckboxInputType::ShouldAppearIndeterminate() const {
  return GetElement().indeterminate();
}

}  // namespace blink