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

**

** 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 <hbinputsettingproxy.h>

#include <hbinputkeymapfactory.h>

#include <hbinputpredictionengine.h>

#include "virtual12key.h"

#include "hbinputprediction12keyhandler_p.h"

#include "hbinputprediction12keythaihandler.h"

class HbInputPrediction12KeyThaiHandlerPrivate: public HbInputPrediction12KeyHandlerPrivate

{

    Q_DECLARE_PUBLIC(HbInputPrediction12KeyThaiHandler)

public:

    HbInputPrediction12KeyThaiHandlerPrivate();

    ~HbInputPrediction12KeyThaiHandlerPrivate();

    bool buttonReleased(const QKeyEvent *keyEvent);

    bool buttonPressed(const QKeyEvent *keyEvent);

    void _q_timeout();

};

HbInputPrediction12KeyThaiHandlerPrivate::HbInputPrediction12KeyThaiHandlerPrivate()

{

}

HbInputPrediction12KeyThaiHandlerPrivate::~HbInputPrediction12KeyThaiHandlerPrivate()

{

}

void HbInputPrediction12KeyThaiHandlerPrivate::_q_timeout()

{

	Q_Q(HbInputPrediction12KeyHandler);

    // let's stop the timer first.

    mTimer->stop();

    if (mButtonDown) {

		if(mLastKey == Qt::Key_0){

			q->actionHandler(HbInputModeHandler::HbInputModeActionCommit);

			q->commitFirstMappedNumber(mLastKey);		

		} else if(mLastKey != Qt::Key_Asterisk) {

			//Long key press number key is applicable to all keys so pass it to Base class

			HbInputPrediction12KeyHandlerPrivate::_q_timeout();            

        }

    }

}

bool HbInputPrediction12KeyThaiHandlerPrivate::buttonPressed(const QKeyEvent *keyEvent)

{

    mLongPressHappened = false;

    HbInputFocusObject *focusObject = 0;

    focusObject = mInputMethod->focusObject();

    if (!focusObject) {

        return false;

    }

    int buttonId = keyEvent->key();

    //Pass the event to base class except Shift key

	if (buttonId == Qt::Key_Shift ) {		

	  mLastKey = buttonId;

	  mButtonDown = true;

	} else {

		HbInputPrediction12KeyHandlerPrivate::buttonPressed(keyEvent);

	}

	// custom button should not start timer.

    if ((buttonId & CUSTOM_INPUT_MASK) != CUSTOM_INPUT_MASK) {

        mTimer->start(HbLongPressTimerTimeout);

    }

    return false;

}

/*!

Handles the key release events from the VKB. Launches the SCT with key release event of

asterisk.

*/

bool HbInputPrediction12KeyThaiHandlerPrivate::buttonReleased(const QKeyEvent *keyEvent)

{

    Q_Q(HbInputPrediction12KeyHandler);

    if(!mButtonDown || mLongPressHappened){

        return false;

    }

    int buttonId = keyEvent->key(); 

    // it was a long press on sct swith button. so just return form here.

    if (!mTimer->isActive() && buttonId == Qt::Key_Control) {

        return true;

    }

	if (buttonId == Qt::Key_Asterisk && !mInputMethod->isSctModeActive()) {

		//Handle if key Asterisk pressed and SCT is not launched or else pass it to base handlers

		if (q->HbInputPredictionHandler::filterEvent(keyEvent)) {

			mButtonDown = false;

			return true;

		}

    } else if ( buttonId == Qt::Key_Shift ) {

		//As we can't map charatcers to Shift key in keymapping, making use of "#" key i.e. Qt::Key_NumberSign

		//in keymapping and manipulating event to Qt::Key_NumberSign when shift key is pressed

		const QKeyEvent *event = new QKeyEvent(QEvent::KeyPress, Qt::Key_NumberSign, Qt::NoModifier);

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

			mButtonDown = false;

			return true;

		}		

	} else {

		HbInputPrediction12KeyHandlerPrivate::buttonReleased(keyEvent);

	}

    return false;

}

HbInputPrediction12KeyThaiHandler::HbInputPrediction12KeyThaiHandler(HbInputAbstractMethod *inputMethod)

    :HbInputPrediction12KeyHandler(* new HbInputPrediction12KeyThaiHandlerPrivate, inputMethod)

{

    Q_D(HbInputPrediction12KeyThaiHandler);

    d->q_ptr = this;

}

HbInputPrediction12KeyThaiHandler::~HbInputPrediction12KeyThaiHandler()

{

}

/*!

    filterEvent to handler keypress/release events.

*/

bool HbInputPrediction12KeyThaiHandler::filterEvent(const QKeyEvent * event)

{

    Q_D(HbInputPrediction12KeyThaiHandler);

    HbInputFocusObject *focusObject = 0;

    focusObject = d->mInputMethod->focusObject();

    //If there was a handling for empty candidate-list, i.e. the engine did not predict

    //any meaningful word for the input sequence. 

	if(!d->mCanContinuePrediction) {

		int eventKey = event->key();

		//let's us return If engine did not predict any meaningful word for the input sequence 

		//for Shift,Asterisk and Control

		if(eventKey == Qt::Key_Control || eventKey == Qt::Key_0) {

			if(d->mCandidates->size() && focusObject ) {

				//Remove the "?" mark

				(*d->mCandidates)[d->mBestGuessLocation].chop(1);

				d->updateEditor();

				d->mCanContinuePrediction = true;

			}

		} else if (eventKey != Qt::Key_Shift && eventKey != Qt::Key_Asterisk){

			// For Shift key and Asterisk key Will handle it in button release Since we have character mapped to Shift and Asterisk

			// or else pass it to Prediction12KeyHandler handler

			HbInputPrediction12KeyHandler::filterEvent(event);

		}

    }	

	// If the word is in inline edit First tap of Qt::Key_0 should commit the word in the editor

	// For successive tap prediction mode can't handle Qt::Key_0, so we will emit a passFilterEvent

    // this signal must be connected to by the plugin to a modehandler.

    // which can handle it.

	if (event->key() == Qt::Key_0 && d->mEngine->inputLength() >= 1 ) {

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

			d->mButtonDown = true;

			// start Long Press timer as zero key should be allowed to enter

			d->mTimer->start(HbLongPressTimerTimeout);

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

			d->mTimer->stop();

			d->mButtonDown = false;

			actionHandler(HbInputModeHandler::HbInputModeActionCommit);

		}

		d->mLastKey = Qt::Key_0;

		return true;

	} else if (event->key() == Qt::Key_0) {

		emit passFilterEvent(event);

		d->mLastKey = Qt::Key_0;

		return true;

	} else {

		if (d->mLastKey == Qt::Key_0) {

			emit passActionHandler(HbInputModeActionCommit);

		}

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

			return d->buttonReleased(event);

		} else {

			return d->buttonPressed(event);

		}

	}

}

//EOF