/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbCore module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this file.

** Please review the following information to ensure the GNU Lesser General

** Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#include "hbiconanimation_p.h"

#include "hbimagetraces_p.h"

#include "hbiconloader_p.h"

#include "hbiconanimationmanager_p.h"

#include "hbiconanimator.h"

#include "hbiconanimator_p.h"

#include "hbtimer_p.h"

#include <QSvgRenderer>

#include <QImageReader>

#include <QPainter>

#include <QPixmap>

#include <QDebug>

#include <QStyleOption>

#include <QApplication>

#include <QPalette>

HbIconAnimation::HbIconAnimation(HbIconAnimator *animator, const QString &iconName) :

    mIconName(iconName),

    mMirrored(false),

    mResolutionCorrected(false),

    mAspectRatioMode(Qt::KeepAspectRatio),

    mMode(QIcon::Normal),

    mPlayMode(HbIconAnimationDefinition::PlayOnce),

    mStartSignalTimer(0),

    mFresh(true),

    mAnimMgrD(HbIconAnimationManagerPrivate::d_ptr(HbIconAnimationManager::global())),

    mColor(QColor()),

    mAnimator(animator),

    mView(0),

    mPaused(false),

    mPausedDueToBackground(false)

{

    Q_ASSERT(!(animator->d->animation));

    // Set the animation in the animator, it takes ownership of this object.

    animator->d->animation = this;

#ifdef HB_ICON_TRACES

    qDebug() << "HbIconAnimation created: " << mIconName;

#endif

}

HbIconAnimation::~HbIconAnimation()

{

#ifdef HB_ICON_TRACES

    qDebug() << "HbIconAnimation destroyed: " << mIconName;

#endif

    mAnimMgrD->animNotPlaying(this);

}

QString HbIconAnimation::iconName() const

{

    return mIconName;

}

QSizeF HbIconAnimation::size() const

{

    return mSize;

}

void HbIconAnimation::setSize(const QSizeF &size)

{

    // If size changed, invalidate calculated render size

    if (size != mSize) {

        mRenderSize = QSizeF();

    }

    mSize = size;

}

QColor HbIconAnimation::color() const

{

    return mColor;

}

void HbIconAnimation::setColor(const QColor &color)

{

    mColor = color;

}

Qt::AspectRatioMode HbIconAnimation::aspectRatioMode() const

{

    return mAspectRatioMode;

}

void HbIconAnimation::setAspectRatioMode(Qt::AspectRatioMode mode)

{

    // If aspect ratio mode changed, invalidate calculated render size

    if (mode != mAspectRatioMode) {

        mRenderSize = QSizeF();

    }

    mAspectRatioMode = mode;

}

QIcon::Mode HbIconAnimation::mode() const

{

    return mMode;

}

void HbIconAnimation::setMode(QIcon::Mode mode)

{

    mMode = mode;

}

QSizeF HbIconAnimation::defaultSize() const

{

    return mDefaultSize;

}

void HbIconAnimation::setDefaultSize(const QSizeF &size)

{

    mDefaultSize = size;

}

QSizeF HbIconAnimation::renderSize() const

{

    if (mRenderSize.isEmpty()) {

        const_cast<QSizeF &>(mRenderSize) = mDefaultSize;

        if (!mSize.isEmpty()) {

            const_cast<QSizeF &>(mRenderSize).scale(mSize, mAspectRatioMode);

        }

        // Apply resolution correction

        if (mResolutionCorrected) {

            HbIconLoader *loader = HbIconLoader::global();

            loader->applyResolutionCorrection(const_cast<QSizeF &>(mRenderSize));

        }

    }

    return mRenderSize;

}

void HbIconAnimation::setRenderSize(const QSizeF &size)

{

    mRenderSize = size;

}

bool HbIconAnimation::mirrored() const

{

    return mMirrored;

}

void HbIconAnimation::setMirrored(bool mirrored)

{

    mMirrored = mirrored;

}

bool HbIconAnimation::resolutionCorrected() const

{

    return mResolutionCorrected;

}

void HbIconAnimation::setResolutionCorrected(bool corrected)

{

    mResolutionCorrected = corrected;

}

HbIconAnimationDefinition::PlayMode HbIconAnimation::playMode() const

{

    return mPlayMode;

}

void HbIconAnimation::setPlayMode(HbIconAnimationDefinition::PlayMode playMode)

{

}

void HbIconAnimation::delayedEmitStarted()

{

    if (!mStartSignalTimer) {

        mStartSignalTimer = new QTimer(this);

        connect(mStartSignalTimer, SIGNAL(timeout()), SLOT(notifyAnimationStarted()));

    }

    mStartSignalTimer->setSingleShot(true);

    mStartSignalTimer->start(0);

}

void HbIconAnimation::notifyAnimationStarted()

{

    mAnimMgrD->animPlaying(this);

    emit animationStarted();

}

void HbIconAnimation::notifyAnimationStopped()

{

    mAnimMgrD->animNotPlaying(this);

    emit animationStopped();

}

void HbIconAnimation::notifyAnimationFinished()

{

    mAnimMgrD->animNotPlaying(this);

    emit animationFinished();

}

// -----------------------------------------------------------------------------

// Class HbIconAnimationSvg

// -----------------------------------------------------------------------------

HbIconAnimationSvg::HbIconAnimationSvg(

    HbIconAnimator *animator,

    const QString &iconName,

    QSvgRenderer *renderer,

    const QString &iconPath) :

    HbIconAnimation(animator, iconName),

    mSvgRenderer(renderer),

    mIconPath(iconPath)

{

    connect(mSvgRenderer, SIGNAL(repaintNeeded()), this, SLOT(handleSvgAnimationUpdated()));

}

HbIconAnimationSvg::~HbIconAnimationSvg()

{

    delete mSvgRenderer;

}

int HbIconAnimationSvg::type() const

{

    return SVG;

}

void HbIconAnimationSvg::start()

{

    // TODO

}

void HbIconAnimationSvg::stop()

{

    // TODO

}

void HbIconAnimationSvg::pause()

{

    // TODO

}

void HbIconAnimationSvg::resume()

{

    // TODO

}

QPixmap HbIconAnimationSvg::currentFrame() const

{

    QSize pixelSize = renderSize().toSize();

    if (!pixelSize.isEmpty()) {

        QPixmap canvasPixmap(pixelSize);

        canvasPixmap.fill(Qt::transparent);

        QPainter painter(&canvasPixmap);

        mSvgRenderer->render(&painter, QRectF(QPointF(), pixelSize));

        painter.end();

        // Apply mirroring if required

        if (mMirrored) {

            QTransform t;

            t.scale(-1, 1);

            canvasPixmap = canvasPixmap.transformed(t);

        }

        // Apply mode

        if (mMode != QIcon::Normal) {

            QStyleOption opt(0);

            opt.palette = QApplication::palette();

            canvasPixmap = QApplication::style()->generatedIconPixmap(mMode, canvasPixmap, &opt);

        }

        return canvasPixmap;

    } else {

#ifdef HB_ICON_TRACES

        qDebug() << "Warning: HbIconAnimationSvg::currentFrame() - SVG default size is empty.";

#endif

        return QPixmap();

    }

}

void HbIconAnimationSvg::handleSvgAnimationUpdated()

{

#ifdef HB_ICON_TRACES

    qDebug() << "HbIconAnimation updated: " << iconName();

#endif

    emit animationUpdated();

}

// -----------------------------------------------------------------------------

// Class HbIconAnimationImage

// -----------------------------------------------------------------------------

HbIconAnimationImage::HbIconAnimationImage(

    HbIconAnimator *animator,

    const QString &iconName,

    const QString &iconFileName,

    QImageReader *renderer,

    int type) :

    HbIconAnimation(animator, iconName),

    mImageRenderer(renderer),

    mIconFileName(iconFileName),

    mType(type),

    mTimerEntry(0)

{

    // This class supports these types

    Q_ASSERT(mType == MNG || mType == GIF);

    // Read the first frame. QImageReader::read() must be called before

    // QImageReader::nextImageDelay()

    QImage img = mImageRenderer->read();

    // Store the first frame in the current frame pixmap

    mCurrentFrame = QPixmap::fromImage(img);

    // Set default size based on the first frame

    setDefaultSize(mCurrentFrame.size());

    // Do not start the timer or initiate any signal emission here.

    // Do it in start() instead, since mFresh is true by default.

}

HbIconAnimationImage::~HbIconAnimationImage()

{

    delete mImageRenderer;

}

int HbIconAnimationImage::type() const

{

    return mType;

}

inline void stopTimer(HbTimerSignalEntry *&entry)

{

    // entry may be non-null and may already be deleted, however this is not a

    // problem because we avoid double deletion by checking the return value of

    // unregisterEntry().

    if (entry && HbTimer::instance()->unregisterEntry(entry)) {

        delete entry;

        entry = 0;

    }

}

void HbIconAnimationImage::start()

{

    if (mStartSignalTimer && mStartSignalTimer->isActive()) {

        return;

    }

    if (mFresh) {

        mFresh = false;

        mTimerInterval = mImageRenderer->nextImageDelay();

        mTimerEntry = HbTimer::instance()->addTimeout(mTimerInterval, this, SLOT(handleAnimationUpdated()));

        // Emit the signal later as nobody is connected at this point (if the

        // animation is auto-started, because the start() comes straight after

        // construction in that case).

        delayedEmitStarted();

    } else {

        stopTimer(mTimerEntry);

        // Recreate the image reader. It's slow but QImageReader::jumpToImage does not work.

        delete mImageRenderer;

        mImageRenderer = 0;

        mImageRenderer = new QImageReader(mIconFileName, mType == MNG ? "MNG" : "GIF");

        // New image reader starts from the first frame. Handle animation update.

        notifyAnimationStarted();

        handleAnimationUpdated();

    }

}

void HbIconAnimationImage::stop()

{

    // If there is still a pending 'started' signal then drop it.

    if (mStartSignalTimer && mStartSignalTimer->isActive()) {

        mStartSignalTimer->stop();

    }

    // Stop the animation and go to the last frame.

    stopTimer(mTimerEntry);

    // Has the last frame been read already?

    if (!mLastFrame.isNull()) {

        mCurrentFrame = mLastFrame;

    } else {

        // Read all frames until the last one.

        // QImageReader::jumpToImage does not work so cannot jump to the last frame if it has not been read yet.

        while (true) {

            QImage img = mImageRenderer->read();

            // Reached last frame?

            if (!mImageRenderer->canRead()) {

                mCurrentFrame = QPixmap::fromImage(img);

                mLastFrame = mCurrentFrame;

                break;

            }

        }

    }

    // Inform client to update display

    emit animationUpdated();

    notifyAnimationStopped();

}

void HbIconAnimationImage::pause()

{

    stopTimer(mTimerEntry);

}

void HbIconAnimationImage::resume()

{

    if (!mTimerEntry) {

        mTimerEntry = HbTimer::instance()->addTimeout(mTimerInterval, this, SLOT(handleAnimationUpdated()));

    }

}

QPixmap HbIconAnimationImage::currentFrame() const

{

    QSize pixelSize = renderSize().toSize();

    QPixmap canvasPixmap;

    if (!pixelSize.isEmpty()) {

        if (pixelSize != mCurrentFrame.size()) {

            canvasPixmap = mCurrentFrame.scaled(pixelSize, mAspectRatioMode, Qt::SmoothTransformation);

        } else {

            canvasPixmap = mCurrentFrame;

        }

        // Apply mirroring if required

        if (mMirrored) {

            QTransform t;

            t.scale(-1, 1);

            canvasPixmap = canvasPixmap.transformed(t);

        }

        // Apply mode

        if (mMode != QIcon::Normal) {

            QStyleOption opt(0);

            opt.palette = QApplication::palette();

            canvasPixmap = QApplication::style()->generatedIconPixmap(mMode, canvasPixmap, &opt);

        }

        return canvasPixmap;

    } else {

#ifdef HB_ICON_TRACES

        qDebug() << "Warning: HbIconAnimationImage::currentFrame() - default size is empty.";

#endif

        return QPixmap();

    }

}

void HbIconAnimationImage::handleAnimationUpdated()

{

    bool finished = false;

    // Read the new frame. QImageReader::read() must be called before

    // QImageReader::nextImageDelay()

    QImage img = mImageRenderer->read();

    int delay = mImageRenderer->nextImageDelay();

    // If there is next image, restart the timer

    if (!img.isNull() && delay > 0) {