/*

 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 *

 */

#include "msgunieditorlineedit.h"

#include <HbTapGesture>

#include <HbMenu>

#include <QApplication>

#include <QClipboard>

const QRegExp expr("[,;\n]$");

const QRegExp sepAtEnd("; $");

const QRegExp sepAtMiddle("; ");

const QString replacementStr("; ");

const QString labelSeperator(": ");

const int fadedAlpha(125);

const int solidAlpha(255);

const int SNAP_DELAY = 350;

//Localization

#define LOC_PASTE hbTrId("txt_common_menu_paste")

MsgUnifiedEditorLineEdit::MsgUnifiedEditorLineEdit(const QString& label,QGraphicsItem *parent):

mSelectionStart(-1),

mSelectionEnd(-1),

mDefaultBehaviour(false)

{

    QString labelStr = label.trimmed();

    QTextCursor cursor(this->textCursor());

    QTextCharFormat colorFormat(cursor.charFormat());

    QColor fgColor = this->palette().color(QPalette::Text);     

    fgColor.setAlpha(fadedAlpha);

    colorFormat.setForeground(fgColor);

    cursor.insertText(labelStr , colorFormat);

    fgColor.setAlpha(solidAlpha);

    colorFormat.setForeground(fgColor);

    cursor.insertText(" ",colorFormat);    

    mLabelExpr.setPattern(QString("^"+labelStr+" $"));

    mLabel = labelStr+" ";

    moveCursor(QTextCursor::EndOfBlock);

    connect(this,SIGNAL(selectionChanged(QTextCursor,QTextCursor)),

            this,SLOT(selectionChanged(QTextCursor,QTextCursor)));

    connect(this, SIGNAL(contentsChanged()), this, SLOT(onContentsChanged()));

    connect(this,SIGNAL(aboutToShowContextMenu(HbMenu*,const QPointF &)),

            this,SLOT(aboutToShowContextMenu(HbMenu*,const QPointF &)));

}

MsgUnifiedEditorLineEdit::~MsgUnifiedEditorLineEdit()

{

}

void MsgUnifiedEditorLineEdit::inputMethodEvent(QInputMethodEvent *event)

{

    //let it go in default way.

    if(mDefaultBehaviour)

    {

        event->accept();

        return;

    }

    if (!event->commitString().isEmpty() || event->replacementLength())

    {

        if (event->commitString().contains(expr))

        {

            if(this->text().isEmpty() || this->text().contains(sepAtEnd) || this->text().contains(mLabelExpr))

            {

                event->accept();

                return;

            }

            this->setCursorPosition(this->text().length());

            QString str = event->commitString();

            str.replace(expr, replacementStr);            

            event->setCommitString(str, event->replacementStart(), event->replacementLength());            

        }

        {// all user inputs get appended at the end

            this->setCursorPosition(this->text().length());

        }

    }

    event->accept();

}

void MsgUnifiedEditorLineEdit::keyPressEvent(QKeyEvent *event)

{

    QString str = event->text();

    if(event->key()== Qt::Key_Enter || event->key()== Qt::Key_Return)

    {

        if(mDefaultBehaviour)

        {

            event->accept();

            return;

        }

        if(this->text().isEmpty() || this->text().contains(sepAtEnd) || this->text().contains(mLabelExpr))

        {

            event->accept();

            return;

        }

        this->setCursorPosition(this->text().length());

        str = replacementStr;

        QKeyEvent eve(event->type(), Qt::Key_Any, event->modifiers(), str);

        event->accept();

        return;

    }

    if(event->key() == Qt::Key_Backspace || event->key() == Qt::Key_Delete )

    {

        int pos = this->cursorPosition();

        bool pbkContact = true;

        {

            this->setCursorPosition(pos-2);

            pbkContact = this->textCursor().charFormat().fontUnderline();

            this->setCursorPosition(pos);

        }

        QString text = this->text();

        text = text.left(pos);

        if(text.contains(mLabelExpr))

        {

            event->accept();

            return;

        }

        if(pbkContact)

        {

            //if already selected delete it.

            {

                // deleting phbkContact is an atomic operation

                // ensure that the signal is emitted only once

                disconnect(this, SIGNAL(contentsChanged()), 

                        this, SLOT(onContentsChanged()));

                event->accept();

                //delete seperator (i.e."; ").

                QKeyEvent eve(event->type(), Qt::Key_Delete, Qt::NoModifier);

                connect(this, SIGNAL(contentsChanged()), 

                        this, SLOT(onContentsChanged()));

                onContentsChanged();

            }

            else //make it selected

            {                

                this->setCursorPosition(pos-3);

                setHighlight(pos-3);

            }

        }

        else

        {

            QString str = text.right(2);

            if(str == replacementStr)

            {

                // deleting contact is an atomic operation

                // ensure that the signal is emitted only once

                disconnect(this, SIGNAL(contentsChanged()), 

                        this, SLOT(onContentsChanged()));

                //delete seperator (i.e."; ").

                QKeyEvent eve(event->type(), Qt::Key_Backspace, Qt::NoModifier);

                connect(this, SIGNAL(contentsChanged()), 

                        this, SLOT(onContentsChanged()));

                onContentsChanged();

            }

            else

            {

            }

            event->accept();

        }

        event->accept();

        return;

    }

    if (event->key() == Qt::Key_Left )

    {

        //look ahead left.

        int pos = this->cursorPosition();

        QString text = this->text();

        text = text.left(pos);

        //no text other than label;

        if(text.contains(mLabelExpr))

        {

            event->accept();

            return;

        }

        //look for next seperator while going left.

        int newPos = text.lastIndexOf(sepAtMiddle);

        if(newPos < 0 && selectedText)

        {

            event->accept();

            return;

        }

        bool pbkContact = true;

        if(!selectedText)

        {

            this->setCursorPosition(pos-2);

            pbkContact = this->textCursor().charFormat().fontUnderline();

            this->setCursorPosition(pos);

        }

        else

        {

            this->setCursorPosition(newPos);

            pbkContact = this->textCursor().charFormat().fontUnderline();

            this->setCursorPosition(pos);

        }

        if(pbkContact && newPos >0)

        {

            setHighlight(newPos-1);

        }

        else

        {

            //move left, char by char. if seperator met jump over it.

            if( (newPos > 0 && selectedText) || (pos-2  == newPos))

            {

                this->setCursorPosition(newPos+1);

            }

        }

        event->accept();

        return;

    }

    if (event->key() == Qt::Key_Right)

    {

        //look ahead.

        int pos = this->cursorPosition();

        this->setCursorPosition(pos+3);

        bool pbkContact = this->textCursor().charFormat().fontUnderline();

        this->setCursorPosition(pos);

        //look for next seperator.

        QString text = this->text();

        int newPos = text.indexOf(sepAtMiddle,pos+2);

        if(pbkContact && newPos >0)

        {

            this->setCursorPosition(newPos-1);

            setHighlight(newPos-1);

        }

        else

        {            

            int seperatorPos = text.indexOf(sepAtMiddle,pos);

            if(selectedText || seperatorPos == pos)

            {

                this->setCursorPosition(pos+1);

                this->deselect();

            }

        }

        event->accept();

        return;

    }

    if(!str.isEmpty())

    {

        if(mDefaultBehaviour)

        {

            event->accept();

            return;

        }

        if (str.contains(expr))

        {

            if(this->text().isEmpty() || this->text().contains(sepAtEnd) || this->text().contains(mLabelExpr))

            {

                event->accept();

                return;

            }

            // auto-complete the last incomplete word

            int contentLength = this->text().length();

            int pos = this->cursorPosition();

            QString incompleteWord(this->text().right(contentLength-(pos-1)));

            if(!incompleteWord.contains(sepAtMiddle))

            {

                this->setCursorPosition(this->text().length());

            }

            str.replace(expr, replacementStr);

            QKeyEvent eve(event->type(), event->key(), event->modifiers(), str);

        }

        else

        {

            event->accept();

            return;

        }

    }

}

void MsgUnifiedEditorLineEdit::handleTap()

{

    int currentPos = this->cursorPosition();

    QString txt = this->text();

    QString tempTxt = txt.left(currentPos+2);

    int seperatorPos = tempTxt.lastIndexOf(sepAtMiddle,currentPos);

    txt = txt.right(txt.length() - currentPos);

    int labelPos = txt.indexOf(labelSeperator);

    if(labelPos >= 0 )//pressed on label.

    {

    }

    else if(seperatorPos == currentPos-1 || seperatorPos == currentPos)//pressed just on seperator.

    {

    }

    else

    {

        bool pbkContact = this->textCursor().charFormat().fontUnderline();

        if(pbkContact)

        {

            setHighlight(currentPos);

        }

    }

    this->update();

}

void MsgUnifiedEditorLineEdit::gestureEvent(QGestureEvent* event)

{

    //passing gesture event to base class.

    if(HbTapGesture *tap = qobject_cast<HbTapGesture*>(event->gesture(Qt::TapGesture)))

    {

        //capturing gesture position, and map to local co-ordinates.

        QPointF pos = mapFromScene(tap->scenePosition());

        switch (tap->state()) 

        {

            case Qt::GestureFinished:

            {

                if (HbTapGesture::Tap == tap->tapStyleHint()) 

                {

                    handleTap();

                }

                break;

            }

            default:

                break;

        }

        event->accept();

    }

    else

    {

        event->ignore();

    }

}

void MsgUnifiedEditorLineEdit::setText(const QString& text, bool underlined)

{

    if(!mDefaultBehaviour)

    {

        // atomic operation, ensure one signal only at the end

        disconnect(this, SIGNAL(contentsChanged()), this, SLOT(onContentsChanged()));

        //make sure previous text is complete.

        if(this->content().length() > 0)

        {

            QInputMethodEvent e;

            e.setCommitString(";");

            this->inputMethodEvent(&e);

        }

        this->setCursorPosition(this->text().length());

        QTextCursor cursor(this->textCursor());

        QTextCharFormat colorFormat(cursor.charFormat());

        if(underlined)

        {

            QColor fgColor = colorFormat.foreground().color();

            fgColor.setAlpha(fadedAlpha);

            colorFormat.setUnderlineColor(fgColor);

            colorFormat.setFontUnderline(true);        

        }

        cursor.insertText(text , colorFormat);

        colorFormat.setFontUnderline(false);

        cursor.insertText(replacementStr,colorFormat);

        connect(this, SIGNAL(contentsChanged()), this, SLOT(onContentsChanged()));

        onContentsChanged();

    }

    else

    {

       this->setCursorPosition(this->text().length());

       QTextCursor cursor(this->textCursor());

       cursor.insertText(text);

    }

    moveCursor(QTextCursor::EndOfBlock);

}

QStringList MsgUnifiedEditorLineEdit::addresses()

{

    QString text = this->content();

    QStringList list = text.split(replacementStr,QString::SkipEmptyParts);

    return list;

}

void MsgUnifiedEditorLineEdit::focusInEvent(QFocusEvent* event)

{    

}

void MsgUnifiedEditorLineEdit::focusOutEvent(QFocusEvent* event)

{    

}

void MsgUnifiedEditorLineEdit::setHighlight(int currentPos)

{

    QString txt = this->text();    

    int endPos = qMax(txt.indexOf(sepAtMiddle,currentPos),

                      txt.indexOf(labelSeperator,currentPos));

    int startPos = qMax(txt.lastIndexOf(sepAtMiddle,currentPos),

                        txt.lastIndexOf(labelSeperator,currentPos));

    disconnect(this,SIGNAL(selectionChanged(QTextCursor,QTextCursor)),

               this,SLOT(selectionChanged(QTextCursor,QTextCursor)));

    //highlight if pbk contact.

    if(startPos > 0 && endPos > 0 && startPos != endPos)

    {

        this->setSelection(startPos + 2, endPos - startPos - 2);

        this->update();

    }

    else

    {

        this->deselect();

    }

    this->update();

    connect(this,SIGNAL(selectionChanged(QTextCursor,QTextCursor)),

            this,SLOT(selectionChanged(QTextCursor,QTextCursor)));

}

void MsgUnifiedEditorLineEdit::selectionChanged(const QTextCursor &oldCursor, const QTextCursor& newCursor)

{

    if(mSelectionSnapTimer.isActive())

    {

        mSelectionSnapTimer.stop();

    }

    if(newCursor.selectionStart() < mLabel.length())

    {

        this->setTextCursor(oldCursor);

        return;

    }

    if(!mDefaultBehaviour)

        {

        mSelectionStart  = newCursor.selectionStart();

        mSelectionEnd    = newCursor.selectionEnd();