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

**

** 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 HbWidgets 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 "hbsmileyengine.h"

#include "hbsmileyengine_p.h"

#include <hbiconanimator.h>

#include <hbicon.h>

#include <QTextDocument>

#include <QFontMetricsF>

#include <QChar>

namespace {

    const qreal ICON_SCALE_FACTOR = 1.5;

}

HbSmileyTheme HbSmileyEnginePrivate::mDefaultTheme = HbSmileyTheme();

QSizeF HbIconTextObject::intrinsicSize(QTextDocument *doc, int posInDocument,

                                    const QTextFormat &format)

{

    Q_UNUSED(doc)

    Q_UNUSED(posInDocument)

    HbSmileyDataType smiley = qVariantValue<HbSmileyDataType>(format.property(HbSmileyData));

    HbIconAnimator *animator = smiley.second;

    Q_ASSERT(animator);

    QFont f = static_cast<const QTextCharFormat&>(format).font();

    QFontMetricsF fm(f);

    // TODO: optimize this

    HbIcon icon = animator->icon();

    qreal iconHeight = fm.height() * ICON_SCALE_FACTOR;

    if(icon.height() != iconHeight) {

        icon.setHeight(iconHeight);

        animator->setIcon(icon);

    }

    return icon.size();

}

void HbIconTextObject::drawObject(QPainter *painter, const QRectF &rect,

                               QTextDocument *doc, int posInDocument,

                               const QTextFormat &format)

{

    Q_UNUSED(doc)

    Q_UNUSED(posInDocument)

    HbSmileyDataType smiley = qVariantValue<HbSmileyDataType>(format.property(HbSmileyData));

    HbIconAnimator *animator = smiley.second;

    animator->paint(painter,rect);

}

HbSmileyEnginePrivate::HbSmileyEnginePrivate()

    :mDocument(0),

     mEdited(true),

     mIconTextObject(new HbIconTextObject)

{

    q_ptr = 0;

}

HbSmileyEnginePrivate::~HbSmileyEnginePrivate()

{

    cleanUp();

    delete mIconTextObject;

}

void HbSmileyEnginePrivate::init()

{

    // Load default smiley theme

    if(mDefaultTheme.isNull()) {

        HbSmileyEnginePrivate::mDefaultTheme.load(":smileys/smileys_theme.sml");

        //

        //TODO: uncomment the lines below if animation definition file is provided for

        //      default smiley theme.

        //HbIconAnimationManager* m = HbIconAnimationManager::global();

        //m->addDefinitionFile(":smileys/smileys_animations.xml");

    }

    mSmileyTheme = HbSmileyEnginePrivate::mDefaultTheme;

}

void HbSmileyEnginePrivate::cleanUp()

{

    QList<QTextCursor*> cursors = mCursorToAnimator.keys();

    qDeleteAll(cursors);

    QList<HbIconAnimator*> animators = mAnimatorToCursors.keys();

    qDeleteAll(animators);

    mAnimatorToCursors.clear();

    mCursorToAnimator.clear();

    mSmileyAnimator.clear();

}

void HbSmileyEnginePrivate::setDocument(QTextDocument *doc)

{

    Q_Q(HbSmileyEngine);

    mDocument = doc;

    mDocument->documentLayout()->registerHandler(HbIconTextFormat, mIconTextObject);

    q->connect(mDocument, SIGNAL(contentsChange(int,int,int)), q, SLOT(_q_documentContentsChanged(int,int,int)));

    cleanUp();

}

void HbSmileyEnginePrivate::insertSmiley( QTextCursor cursor, const QString& name)

{

    QTextCharFormat hbiconFormat;

    QTextCursor *tmpCursor = new QTextCursor(cursor);

    hbiconFormat.setObjectType(HbIconTextFormat);

    HbIconTextObject::HbSmileyDataType smiley;

    HbIconAnimator *animator = lookupAnimator(name);

    smiley.first = tmpCursor;

    smiley.second = animator;

    hbiconFormat.setProperty(HbIconTextObject::HbSmileyData, qVariantFromValue(smiley));

    mEdited = false;

    tmpCursor->insertText(QString(QChar::ObjectReplacementCharacter), hbiconFormat);

    mEdited = true;

    tmpCursor->setPosition(tmpCursor->position()-1);

    mAnimatorToCursors[animator] << tmpCursor;

    mCursorToAnimator[tmpCursor] = animator;

}

void HbSmileyEnginePrivate::insertSmileys( QTextCursor cursor, bool insertOne)

{

    QString regexpStr;

    foreach (QString pattern, mSmileyTheme.patterns()) {

        regexpStr += QRegExp::escape(pattern) + "|";

    }

    regexpStr.remove(regexpStr.count()-1, 1);

    QRegExp rx(regexpStr);

    cursor = mDocument->find(rx, cursor);

    while ( !cursor.isNull()){

        insertSmiley(cursor, mSmileyTheme.smiley(cursor.selectedText()));

        if (insertOne) {

            break;

        }

        cursor = mDocument->find(rx, cursor);

    }

}

HbIconAnimator* HbSmileyEnginePrivate::lookupAnimator(const QString& name)

{

    Q_Q(HbSmileyEngine);

    HbIconAnimator *animator = mSmileyAnimator.value(name);

    // Init icon if it doesn't already exits

    if (!animator) {

        HbIconAnimator *newAnimator = new HbIconAnimator();

        animator = newAnimator;

        HbIcon icon = HbIcon(name);

        icon.setFlags(HbIcon::NoAutoStartAnimation);

        animator->setIcon(icon);

        q->connect(animator,SIGNAL(animationProgressed()),q,SLOT(_q_animationProgressed()));

        animator->startAnimation();

        mSmileyAnimator[name] = animator;

    }

    return animator;

}

bool HbSmileyEnginePrivate::isCursorValid(QTextCursor* cursor) const

{

    bool ret = true;

    if (cursor) {

        if (mDocument->characterAt(cursor->position()) != QChar::ObjectReplacementCharacter) {

            ret = false;

         } else {

             QTextCursor tmpCursor(*cursor);

             tmpCursor.setPosition(tmpCursor.position()+1);

             QTextCharFormat format = tmpCursor.charFormat();

             HbIconTextObject::HbSmileyDataType smiley =

                     qVariantValue<HbIconTextObject::HbSmileyDataType>(format.property(HbIconTextObject::HbSmileyData));

             if (cursor != smiley.first) {

                ret = false;

             }

         }

     } else {

        ret = false;

     }

    return ret;

}

void HbSmileyEnginePrivate::convertToText(QTextDocument *copyDoc) const

{

    QList<QTextCursor> cursors;

    // copy the cursors to copy document so that the positions get automatically updated

    foreach(QTextCursor *cursor, mCursorToAnimator.keys()) {

        if(isCursorValid(cursor)) {

            QTextCursor copyCursor(copyDoc);

            copyCursor.setPosition(cursor->position());

            cursors << copyCursor;

        }

    }

    foreach(QTextCursor copyCursor, cursors) {

        copyCursor.setPosition(copyCursor.position()+1, QTextCursor::KeepAnchor);

        QTextFormat format = copyCursor.charFormat();

        HbIconTextObject::HbSmileyDataType smiley =

                qVariantValue<HbIconTextObject::HbSmileyDataType>(format.property(HbIconTextObject::HbSmileyData));

        HbIconAnimator *animator = smiley.second;

        Q_ASSERT(animator);

        QString pattern = mSmileyTheme.patterns(mSmileyAnimator.key(animator)).first();

        copyCursor.deleteChar();

        copyCursor.insertText(pattern);

    }

}

void HbSmileyEnginePrivate::_q_animationProgressed()

{

    Q_Q(HbSmileyEngine);

    HbIconAnimator *animator = qobject_cast<HbIconAnimator *>(q->sender());

    Q_ASSERT(animator);

    foreach(QTextCursor *cursor, mAnimatorToCursors.value(animator)) {

        QTextCursor tmpCursor(*cursor);

        tmpCursor.setPosition(tmpCursor.position()+1, QTextCursor::KeepAnchor);

        // update a bogus property, which will trigger a paint

        QTextCharFormat format;

        format.setProperty(HbIconTextObject::HbSmileyData+1, QString("Dummy"));

        mEdited = false;

        tmpCursor.mergeCharFormat(format);

        mEdited = true;

    }

}

void HbSmileyEnginePrivate::_q_documentContentsChanged(int position, int charsRemoved, int charsAdded)

{

    Q_UNUSED(position);

    Q_UNUSED(charsRemoved);

    Q_UNUSED(charsAdded);

    if(charsRemoved > 0 && mEdited) {

        foreach (QTextCursor* cursor, mCursorToAnimator.keys()) {          

            if (!isCursorValid(cursor)) {

                HbIconAnimator * animator = mCursorToAnimator.value(cursor);

                mCursorToAnimator.remove(cursor);

                QList<QTextCursor*> & cursorList = mAnimatorToCursors[animator];

                cursorList.removeFirst();

                if (!cursorList.count()) {

                    mAnimatorToCursors.remove(animator);

                    mSmileyAnimator.remove(mSmileyAnimator.key(animator));

                    animator->deleteLater();

                }

                delete cursor;

            }

        }

    }

}

HbSmileyEngine::HbSmileyEngine(QObject *parent)

    :QObject(parent),

    d_ptr(new HbSmileyEnginePrivate)

{

    Q_D(HbSmileyEngine);

    d->q_ptr = this;

    d->init();

}

HbSmileyEngine::HbSmileyEngine(HbSmileyEnginePrivate &dd, QObject *parent)

    :QObject(parent),

    d_ptr(&dd)

{

    Q_D(HbSmileyEngine);

    d->q_ptr = this;

    d->init();

}

HbSmileyEngine::~HbSmileyEngine()

{

    delete d_ptr;

}

void HbSmileyEngine::setDocument(QTextDocument *doc)

{

    Q_D(HbSmileyEngine);

    d->setDocument(doc);

}

void HbSmileyEngine::setTheme(const HbSmileyTheme& theme)

{

    Q_D(HbSmileyEngine);

    d->mSmileyTheme = theme;

}

HbSmileyTheme HbSmileyEngine::theme() const

{

    Q_D(const HbSmileyEngine);

    return d->mSmileyTheme;

}

HbSmileyTheme HbSmileyEngine::defaultTheme() const

{

    return HbSmileyEnginePrivate::mDefaultTheme;

}

QString HbSmileyEngine::toPlainText() const

{

    Q_D(const HbSmileyEngine);

    QTextDocument *copyDoc = d->mDocument->clone();

    d->convertToText(copyDoc);

    QString plainText = copyDoc->toPlainText();

    delete copyDoc;

    return plainText;

}

QString HbSmileyEngine::toHtml() const

{

    Q_D(const HbSmileyEngine);

    QTextDocument *copyDoc = d->mDocument->clone();

    d->convertToText(copyDoc);

    QString htmlString = copyDoc->toHtml();

    return htmlString;

}

void HbSmileyEngine::startAnimation()

{

    Q_D(HbSmileyEngine);

    foreach (HbIconAnimator *animator, d->mAnimatorToCursors.keys()) {

        animator->startAnimation();

    }

}

void HbSmileyEngine::stopAnimation()

{

    Q_D(HbSmileyEngine);

    foreach (HbIconAnimator *animator, d->mAnimatorToCursors.keys()) {

        animator->stopAnimation();

    }

}

void HbSmileyEngine::insertSmileys()

{

    Q_D(HbSmileyEngine);

    QTextCursor cursor(d->mDocument);

    d->insertSmileys(cursor);

}

void HbSmileyEngine::insertSmileys(const QTextCursor& cursor)

{

    Q_D(HbSmileyEngine);

    d->insertSmileys(cursor);

}

void HbSmileyEngine::insertSmiley(const QTextCursor& cursor)

{

    Q_D(HbSmileyEngine);

    d->insertSmileys(cursor,true);

}

#include "moc_hbsmileyengine.cpp"