/*

 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)

 *           (C) 1999 Antti Koivisto (koivisto@kde.org)

 *           (C) 2001 Dirk Mueller (mueller@kde.org)

 * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.

 *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)

 * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public License

 * along with this library; see the file COPYING.LIB.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 *

 */

#include "config.h"

#include "HTMLButtonElement.h"

#include "Attribute.h"

#include "EventNames.h"

#include "FormDataList.h"

#include "HTMLFormElement.h"

#include "HTMLNames.h"

#include "KeyboardEvent.h"

#include "RenderButton.h"

#include "ScriptEventListener.h"

#include <wtf/StdLibExtras.h>

namespace WebCore {

using namespace HTMLNames;

inline HTMLButtonElement::HTMLButtonElement(const QualifiedName& tagName, Document* document, HTMLFormElement* form)

    : HTMLFormControlElement(tagName, document, form)

    , m_type(SUBMIT)

    , m_activeSubmit(false)

{

    ASSERT(hasTagName(buttonTag));

}

PassRefPtr<HTMLButtonElement> HTMLButtonElement::create(const QualifiedName& tagName, Document* document, HTMLFormElement* form)

{

    return adoptRef(new HTMLButtonElement(tagName, document, form));

}

RenderObject* HTMLButtonElement::createRenderer(RenderArena* arena, RenderStyle*)

{

    return new (arena) RenderButton(this);

}

const AtomicString& HTMLButtonElement::formControlType() const

{

    switch (m_type) {

        case SUBMIT: {

            DEFINE_STATIC_LOCAL(const AtomicString, submit, ("submit"));

            return submit;

        }

        case BUTTON: {

            DEFINE_STATIC_LOCAL(const AtomicString, button, ("button"));

            return button;

        }

        case RESET: {

            DEFINE_STATIC_LOCAL(const AtomicString, reset, ("reset"));

            return reset;

        }

    }

    ASSERT_NOT_REACHED();

    return emptyAtom;

}

void HTMLButtonElement::parseMappedAttribute(Attribute* attr)

{

    if (attr->name() == typeAttr) {

        if (equalIgnoringCase(attr->value(), "reset"))

            m_type = RESET;

        else if (equalIgnoringCase(attr->value(), "button"))

            m_type = BUTTON;

        else

            m_type = SUBMIT;

    } else if (attr->name() == alignAttr) {

        // Don't map 'align' attribute.  This matches what Firefox and IE do, but not Opera.

        // See http://bugs.webkit.org/show_bug.cgi?id=12071

    } else

        HTMLFormControlElement::parseMappedAttribute(attr);

}

void HTMLButtonElement::defaultEventHandler(Event* evt)

{

    if (evt->type() == eventNames().DOMActivateEvent && !disabled()) {

        if (form() && m_type == SUBMIT) {

            m_activeSubmit = true;

            form()->prepareSubmit(evt);

            m_activeSubmit = false; // in case we were canceled

        }

        if (form() && m_type == RESET)

            form()->reset();

    }

    if (evt->isKeyboardEvent()) {

        if (evt->type() == eventNames().keydownEvent && static_cast<KeyboardEvent*>(evt)->keyIdentifier() == "U+0020") {

            setActive(true, true);

            // No setDefaultHandled() - IE dispatches a keypress in this case.

            return;

        }

        if (evt->type() == eventNames().keypressEvent) {

            switch (static_cast<KeyboardEvent*>(evt)->charCode()) {

                case '\r':

                    dispatchSimulatedClick(evt);

                    evt->setDefaultHandled();

                    return;

                case ' ':

                    // Prevent scrolling down the page.

                    evt->setDefaultHandled();

                    return;

                default:

                    break;

            }

        }

        if (evt->type() == eventNames().keyupEvent && static_cast<KeyboardEvent*>(evt)->keyIdentifier() == "U+0020") {

            if (active())

                dispatchSimulatedClick(evt);

            evt->setDefaultHandled();

            return;

        }

    }

    HTMLFormControlElement::defaultEventHandler(evt);

}

bool HTMLButtonElement::isSuccessfulSubmitButton() const

{

    // HTML spec says that buttons must have names to be considered successful.

    // However, other browsers do not impose this constraint.

    return m_type == SUBMIT && !disabled();

}

bool HTMLButtonElement::isActivatedSubmit() const

{

    return m_activeSubmit;

}

void HTMLButtonElement::setActivatedSubmit(bool flag)

{

    m_activeSubmit = flag;

}

bool HTMLButtonElement::appendFormData(FormDataList& formData, bool)

{

    if (m_type != SUBMIT || name().isEmpty() || !m_activeSubmit)

        return false;

    formData.appendData(name(), value());

    return true;

}

void HTMLButtonElement::accessKeyAction(bool sendToAnyElement)

{

    focus();

    // send the mouse button events iff the caller specified sendToAnyElement

    dispatchSimulatedClick(0, sendToAnyElement);

}

String HTMLButtonElement::value() const

{

    return getAttribute(valueAttr);

}

} // namespace