/****************************************************************************
**
** 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 <hbinputbutton.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);
};

HbInputPrediction12KeyThaiHandlerPrivate::HbInputPrediction12KeyThaiHandlerPrivate()
{
}

HbInputPrediction12KeyThaiHandlerPrivate::~HbInputPrediction12KeyThaiHandlerPrivate()
{
   
}

bool HbInputPrediction12KeyThaiHandlerPrivate::buttonPressed(const QKeyEvent *keyEvent)
{
    Q_Q(HbInputPrediction12KeyThaiHandler);

    mLongPressHappened = false;
    HbInputFocusObject *focusObject = 0;
    focusObject = mInputMethod->focusObject();
    if (!focusObject) {
        return false;
    }

    int buttonId = keyEvent->key();

    if (keyEvent->isAutoRepeat() && mLastKey == buttonId) {
        if (buttonId == Qt::Key_0) {
			q->actionHandler(HbInputModeHandler::HbInputModeActionCommit);
			q->commitFirstMappedNumber(buttonId, mInputMethod->currentKeyboardType());
            mLongPressHappened = true;
        } else if (buttonId != HbInputButton::ButtonKeyCodeAsterisk) {
            return HbInputPrediction12KeyHandlerPrivate::buttonPressed(keyEvent);
        }
        if (mLongPressHappened) {
            mLastKey = 0;
            return true;
        }        
    }

    //Pass the event to base class except Shift key
	if (buttonId == Qt::Key_Shift) {		
	  mLastKey = buttonId;
	  mButtonDown = true;
	} else {
		return HbInputPrediction12KeyHandlerPrivate::buttonPressed(keyEvent);
	}
    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){
        mLongPressHappened = false;
        return false;
    }

    int buttonId = keyEvent->key(); 

	if (buttonId == HbInputButton::ButtonKeyCodeAsterisk && !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 == HbInputButton::ButtonKeyCodeShift ) {
		//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;
		} 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