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

**

** 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 HbPlugins 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 <QTimer>

#include <hbinputkeymap.h>

#include <hbinputkeymapfactory.h>

#include <hbinputsettingproxy.h>

#include "hbinputabstractbase.h"

#include "hbinputbasichandler_p.h"

#include "hbinputmodehandler_p.h"

#include "hbhardwareinputbasicqwertyhandler.h"

class HbHardwareInputBasicQwertyHandlerPrivate: public HbInputBasicHandlerPrivate

{

    Q_DECLARE_PUBLIC(HbHardwareInputBasicQwertyHandler)

public:

    HbHardwareInputBasicQwertyHandlerPrivate();

    ~HbHardwareInputBasicQwertyHandlerPrivate();

    // button related operations.

    bool buttonPressed(const QKeyEvent *event);

    bool buttonReleased(const QKeyEvent *event);

    void _q_timeout();

public:

    HbFnState mFnState;

    int mButton;

    HbInputShiftKeyState mShiftKeyState;

};

HbHardwareInputBasicQwertyHandlerPrivate::HbHardwareInputBasicQwertyHandlerPrivate()

:mFnState(HbFnOff),

mButton(0),

mShiftKeyState(EKeyPressedNone)

{

}

HbHardwareInputBasicQwertyHandlerPrivate::~HbHardwareInputBasicQwertyHandlerPrivate()

{

}

bool HbHardwareInputBasicQwertyHandlerPrivate::buttonPressed(const QKeyEvent * event)

{

    mButton = event->key();

    if (!mTimer->isActive()){

        mTimer->start(HbLongPressTimerTimeout);

    }

    if (event->key() != Qt::Key_Delete && event->key() != Qt::Key_Backspace) {

        return true;

    } else {

        return false;

    }

}

bool HbHardwareInputBasicQwertyHandlerPrivate::buttonReleased(const QKeyEvent * event)

{

// Kept for handling button released specific logic

    Q_Q(HbHardwareInputBasicQwertyHandler);

    HbInputFocusObject *focusObject = 0;

    focusObject = mInputMethod->focusObject();

    if (!focusObject) {

        qDebug("HbHardwareInputBasicQwertyHandler::virtualButtonClicked : no focused editor widget!");

        return false;

    }

    // If the timer is not active and it is alpha mode, it is a long press

    // and handled in another function. So just return.

    if (mTimer->isActive()) {

        mTimer->stop();

    }

    int eventKey = event->key();

    //Handle long key press here

    switch(eventKey) {

    case Qt::Key_Alt:

        //handle function key (fn key) states here using fn & shift handler helper class

        break;

    case Qt::Key_Shift: {

        //If the shift key state is EShiftKeyPressed and a second shift key press is received before any other

        //key events, then current text case should not be changed.

        if (mShiftKeyState){

            mShiftKeyState = EKeyPressedNone;

        } else {

            mShiftKeyState = EShiftKeyPressed;

            int currentTextCase = focusObject->editorInterface().textCase();

            switch(currentTextCase) {

            case HbTextCaseLower:

                focusObject->editorInterface().setTextCase(HbTextCaseUpper);

                focusObject->syncEditorInterface();

                break;

            case HbTextCaseUpper:

            case HbTextCaseAutomatic:

                focusObject->editorInterface().setTextCase(HbTextCaseLower);

                focusObject->syncEditorInterface();

                break;

            default:

                break;

            }

        }

    }

        break;

    case Qt::Key_Control:{

        return true;

        }

        break;

    case Qt::Key_Backspace:

    case Qt::Key_Delete: {

        // let's pass the backspace event to the focused editor.

        //return q->HbInputBasicHandler::filterEvent(event);

        break;

    }

    case Qt::Key_Return:

    case Qt::Key_Enter:

    case Qt::Key_Space: {

        QChar qc(eventKey);

        if(Qt::Key_Space == eventKey && (event->modifiers() & Qt::ControlModifier)){

            if (HbInputSettingProxy::instance()->predictiveInputStatus()) {

                    HbInputSettingProxy::instance()->setPredictiveInputStatus(0);

                } else {

                    HbInputSettingProxy::instance()->setPredictiveInputStatus(1);

                }

            break;

        }

        if (qc == Qt::Key_Enter || qc == Qt::Key_Return) {

            qc = QChar('\n');  // Editor expects normal line feed.

        }

        if(focusObject){

            q->commitAndUpdate(qc); 

        }

        break;

        }

    default: {

        if (q->HbInputBasicHandler::filterEvent(event)) {

                return true;

            }   

        QList<QInputMethodEvent::Attribute> list;

        QString newText;

        int currentTextCase = focusObject->editorInterface().textCase();

        // If function key is pressed, get the functionized 

        QString chars;

        const HbMappedKey* mappedKey = mKeymap->keyForKeycode(mInputMethod->inputState().keyboard(), eventKey);

        if (currentTextCase == HbTextCaseLower)

           chars = mappedKey->characters(HbModifierNone);

        else

           chars = mappedKey->characters(HbModifierShiftPressed);

        if(chars.length()){

            q->commitAndUpdate(chars);

        }

        // Reset the shift state.

        if (EShiftKeyPressed == mShiftKeyState) {

            mShiftKeyState = EKeyPressedNone;

            int textCase = HbTextCaseLower;

            HbModifier modifier = HbModifierNone;

            if (HbTextCaseLower == currentTextCase) {

                textCase = HbTextCaseUpper;

                modifier = HbModifierShiftPressed;

            }

            focusObject->editorInterface().setTextCase(textCase);

            focusObject->syncEditorInterface();

        }

        mInputMethod->updateState();

        }

        break;

    }   

    return true;

}

void HbHardwareInputBasicQwertyHandlerPrivate::_q_timeout()

{

    mTimer->stop();

    qDebug("Timer stoped");

    if (mButton == Qt::Key_Shift ){

        mShiftKeyState = EShiftKeyPressed;

    } else {        

        mFnState = HbFnNext;

    }

    return;

}

HbHardwareInputBasicQwertyHandler::HbHardwareInputBasicQwertyHandler(HbInputAbstractMethod* inputMethod)

:HbInputBasicHandler(* new HbHardwareInputBasicQwertyHandlerPrivate, inputMethod)

{

    Q_D(HbHardwareInputBasicQwertyHandler);

    d->q_ptr = this;

}

HbHardwareInputBasicQwertyHandler::~HbHardwareInputBasicQwertyHandler()

{

}

/*!

filterEvent function key handling.

*/

bool HbHardwareInputBasicQwertyHandler::filterEvent(const QKeyEvent* event)

{

    Q_D(HbHardwareInputBasicQwertyHandler);

    if (!event->isAutoRepeat()) {

        if ((event->type() == QEvent::KeyRelease) ) {

            return d->buttonReleased(event);

        } else {

            return d->buttonPressed(event);

        }

    }

    return false;

}

/*!

returns true if in inline edit.

*/

bool HbHardwareInputBasicQwertyHandler::isComposing() const

{   

    Q_D(const HbHardwareInputBasicQwertyHandler);

    return d->mTimer->isActive();

}

/*!

Action handler

*/

bool HbHardwareInputBasicQwertyHandler::actionHandler(HbInputModeAction action)

{

    Q_D(HbHardwareInputBasicQwertyHandler);

    bool ret = true;

    switch (action) {

    case HbInputModeActionReset:

        if (d->mTimer->isActive()) {

            d->mTimer->stop();

            qDebug("Timer stoped");

        }

        break;

    default: {

        ret = HbInputBasicHandler::actionHandler(action);

        }

    }

    return ret;

}

/*!

this SLOT is called by input plugin when there is a character selected from character preview pane.

*/

void HbHardwareInputBasicQwertyHandler::charFromPreviewSelected(QString characters)

{

    Q_D(HbHardwareInputBasicQwertyHandler);

    if(characters.size() > 0) {

        sctCharacterSelected(characters[0]);

        d->mInputMethod->updateState();

    }

}

void HbHardwareInputBasicQwertyHandler::sctCharacterSelected(QChar character)

{

    HbInputModeHandler::sctCharacterSelected(character);

}