/*

 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

 *

 * 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"

#if ENABLE(PROGRESS_TAG)

#include "RenderProgress.h"

#include "HTMLNames.h"

#include "HTMLProgressElement.h"

#include "RenderTheme.h"

#include "ShadowElement.h"

#include <wtf/CurrentTime.h>

#include <wtf/RefPtr.h>

using namespace std;

namespace WebCore {

RenderProgress::RenderProgress(HTMLProgressElement* element)

    : RenderIndicator(element)

    , m_position(-1)

    , m_animationStartTime(0)

    , m_animationRepeatInterval(0)

    , m_animationDuration(0)

    , m_animating(false)

    , m_animationTimer(this, &RenderProgress::animationTimerFired)

{

}

RenderProgress::~RenderProgress()

{

    if (m_valuePart)

        m_valuePart->detach();

}

void RenderProgress::updateFromElement()

{

    HTMLProgressElement* element = progressElement();

    if (m_position == element->position())

        return;

    m_position = element->position();

    updateAnimationState();

    RenderIndicator::updateFromElement();

}

double RenderProgress::animationProgress() const

{

    return m_animating ? (fmod((currentTime() - m_animationStartTime), m_animationDuration) / m_animationDuration) : 0;

}

bool RenderProgress::isDeterminate() const

{

    return 0 <= position();

}

void RenderProgress::animationTimerFired(Timer<RenderProgress>*)

{

    repaint();

}

void RenderProgress::paint(PaintInfo& paintInfo, int tx, int ty)

{

    if (paintInfo.phase == PaintPhaseBlockBackground) {

        if (!m_animationTimer.isActive() && m_animating)

            m_animationTimer.startOneShot(m_animationRepeatInterval);

    }

    RenderIndicator::paint(paintInfo, tx, ty);

}

void RenderProgress::layoutParts()

{

    updatePartsState();

    if (m_valuePart)

        m_valuePart->layoutAsPart(valuePartRect());

    updateAnimationState();

}

bool RenderProgress::shouldHaveParts() const

{

    if (!style()->hasAppearance())

        return true;

    if (ShadowBlockElement::partShouldHaveStyle(this, PROGRESS_BAR_VALUE))

        return true;

    return false;

}

void RenderProgress::updatePartsState()

{

    if (shouldHaveParts() && !m_valuePart) {

        style()->setAppearance(NoControlPart);

        m_valuePart = ShadowBlockElement::createForPart(this->node(), PROGRESS_BAR_VALUE);

        addChild(m_valuePart->renderer());

    } else if (!shouldHaveParts() && m_valuePart) {

        m_valuePart->detach();

        m_valuePart = 0;

    }

}

void RenderProgress::updateAnimationState()

{

    m_animationDuration = theme()->animationDurationForProgressBar(this);

    m_animationRepeatInterval = theme()->animationRepeatIntervalForProgressBar(this);

    bool animating = style()->hasAppearance() && m_animationDuration > 0;

    if (animating == m_animating)

        return;

    m_animating = animating;

    if (m_animating) {

        m_animationStartTime = currentTime();

        m_animationTimer.startOneShot(m_animationRepeatInterval);

    } else

        m_animationTimer.stop();

}

IntRect RenderProgress::valuePartRect() const

{

    IntRect rect(borderLeft() + paddingLeft(), borderTop() + paddingTop(), lround((width() - borderLeft() - paddingLeft() - borderRight() - paddingRight()) * position()), height()  - borderTop() - paddingTop() - borderBottom() - paddingBottom());

    if (style()->direction() == RTL)

        rect.setX(width() - borderRight() - paddingRight() - rect.width());

    return rect;

}

HTMLProgressElement* RenderProgress::progressElement() const

{

    return static_cast<HTMLProgressElement*>(node());

}    

} // namespace WebCore

#endif