third_party/WebKit/Source/core/html/forms/BaseCheckableInputType.cpp

/*
 * 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:
 *
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 * 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/BaseCheckableInputType.h"

#include "core/HTMLNames.h"
#include "core/events/KeyboardEvent.h"
#include "core/html/FormData.h"
#include "core/html/HTMLInputElement.h"
#include "core/html/forms/FormController.h"

namespace blink {

using namespace HTMLNames;

DEFINE_TRACE(BaseCheckableInputType)
{
    InputTypeView::trace(visitor);
    InputType::trace(visitor);
}

InputTypeView* BaseCheckableInputType::createView()
{
    return this;
}

FormControlState BaseCheckableInputType::saveFormControlState() const
{
    return FormControlState(element().checked() ? "on" : "off");
}

void BaseCheckableInputType::restoreFormControlState(const FormControlState& state)
{
    element().setChecked(state[0] == "on");
}

void BaseCheckableInputType::appendToFormData(FormData& formData) const
{
    if (element().checked())
        formData.append(element().name(), element().value());
}

void BaseCheckableInputType::handleKeydownEvent(KeyboardEvent* event)
{
    const String& key = event->key();
    if (key == " ") {
        element().setActive(true);
        // No setDefaultHandled(), because IE dispatches a keypress in this case
        // and the caller will only dispatch a keypress if we don't call setDefaultHandled().
    }
}

void BaseCheckableInputType::handleKeypressEvent(KeyboardEvent* event)
{
    if (event->charCode() == ' ') {
        // Prevent scrolling down the page.
        event->setDefaultHandled();
    }
}

bool BaseCheckableInputType::canSetStringValue() const
{
    return false;
}

// FIXME: Could share this with KeyboardClickableInputTypeView and
// RangeInputType if we had a common base class.
void BaseCheckableInputType::accessKeyAction(bool sendMouseEvents)
{
    InputTypeView::accessKeyAction(sendMouseEvents);

    element().dispatchSimulatedClick(0, sendMouseEvents ? SendMouseUpDownEvents : SendNoEvents);
}

bool BaseCheckableInputType::matchesDefaultPseudoClass()
{
    return element().fastHasAttribute(checkedAttr);
}

String BaseCheckableInputType::fallbackValue() const
{
    return "on";
}

bool BaseCheckableInputType::storesValueSeparateFromAttribute()
{
    return false;
}

void BaseCheckableInputType::setValue(const String& sanitizedValue, bool, TextFieldEventBehavior)
{
    element().setAttribute(valueAttr, AtomicString(sanitizedValue));
}

void BaseCheckableInputType::readingChecked() const
{
    if (m_isInClickHandler)
        UseCounter::count(element().document(), UseCounter::ReadingCheckedInClickHandler);
}

bool BaseCheckableInputType::isCheckable()
{
    return true;
}

bool BaseCheckableInputType::shouldDispatchFormControlChangeEvent(String& oldValue, String& newValue)
{
    return oldValue != newValue;
}

} // namespace blink