/*

* 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: implementation of recipient field (to, cc, bcc) line editor

*

*/

#include "nmailuiwidgetsheaders.h"

static const QString NmRecipientLineEditSemicolon(";");

static const QString NmRecipientLineEditDelimiter("; ");

static const QRegExp NmRecipientLineEditCommaOrSemicolon("[,;]");

static const int NmRecipientLineEditFadedAlpha(125);

static const int NmRecipientLineEditForegroundZValue(200);

static const int NmRecipientLineEditBackgroundZValue(0);

static const QString FILE_PATH_WIDGETML = ":nmrecipientlineedit.widgetml";

static const QString FILE_PATH_CSS = ":nmrecipientlineedit.css";

static const QString FILE_PATH_AUTOFILL_DOCML = ":nmautofilllistview.docml";

static const QString FILE_PATH_AUTOFILLITEM_WIDGETML = ":nmautofilllistviewitem.widgetml";

static const QString FILE_PATH_AUTOFILLITEM_CSS = ":nmautofilllistviewitem.css";

/*!

   Constructor

*/

NmRecipientLineEdit::NmRecipientLineEdit(QGraphicsItem *parent)

    : NmHtmlLineEdit(parent),

    mNeedToGenerateEmailAddressList(true),

    mContactHistoryModel(NULL),

    mAutoFillPopup(NULL),

    mAutofillListView(NULL),

    mAutofillListViewItem(NULL),

    mPopupBackground(NULL)

{

    NM_FUNCTION;

    HbStyleLoader::registerFilePath(FILE_PATH_WIDGETML);

    HbStyleLoader::registerFilePath(FILE_PATH_CSS);

    HbStyleLoader::registerFilePath(FILE_PATH_AUTOFILLITEM_WIDGETML);

    HbStyleLoader::registerFilePath(FILE_PATH_AUTOFILLITEM_CSS);

    createAutofillComponents();

    connect(this, SIGNAL(textChanged(QString)), this, SLOT(handleTextChanged(QString)));

}

/*!

   Destructor

*/

NmRecipientLineEdit::~NmRecipientLineEdit()

{

    NM_FUNCTION;

    delete mPopupBackground;

    delete mContactHistoryModel;

    delete mAutofillListView;

    HbStyleLoader::unregisterFilePath(FILE_PATH_WIDGETML);

    HbStyleLoader::unregisterFilePath(FILE_PATH_CSS);

    HbStyleLoader::unregisterFilePath(FILE_PATH_AUTOFILLITEM_WIDGETML);

    HbStyleLoader::unregisterFilePath(FILE_PATH_AUTOFILLITEM_CSS);

}

/*!

   Get the emailaddress list generated from the content of the lineedit.

*/

QList<NmAddress> NmRecipientLineEdit::emailAddressList()

{

    NM_FUNCTION;

    if (mNeedToGenerateEmailAddressList) {

        // Empty mEmailAddressList.

        mEmailAddressList.clear();

        // Generate mEmailAddressList from the lineedit content.

        generateEmailAddressList();

        mNeedToGenerateEmailAddressList = false;

    }

    return mEmailAddressList;

}

/*!

   This Slot appends the selected contacts to the end of the lineedit content.

*/

void NmRecipientLineEdit::addSelectedContacts(const QVariant &selectedContacts)

{

    NM_FUNCTION;

    // If user selected contact

    if (!selectedContacts.isNull()) {

        // If the lineedit is not empty and if there is no ";" or "; " at the end,

        // add a delimiter("; ") at the end.

        if (text().length() != 0 && !(text().endsWith(NmRecipientLineEditSemicolon)) &&

            !(text().endsWith(NmRecipientLineEditDelimiter))){

            // Move cursor to the end of the lineedit.

            setCursorPosition(text().length());

            QTextCursor textCursor(this->textCursor());

            // Append delimiter("; ") to the end of the lineedit

            textCursor.insertText(NmRecipientLineEditDelimiter);

        }

        CntServicesContactList contactList = qVariantValue<CntServicesContactList>(selectedContacts);

        // Loop through all the selected contacts.

        for (int i = 0; i < contactList.count(); ++i) {

            QString contactName = contactList[i].mDisplayName;

            QString contactEmailAddress = contactList[i].mEmailAddress;

            // If this contact has no name, use it's emailaddress as the display name

            if (contactName.isEmpty()) {

                // Move cursor to the end of the lineedit.

                setCursorPosition(text().length());

                insertContactText(contactEmailAddress);

            }

            // If this contact has name, use the name as the display name

            else {

                // Handle a rare case: there are contacts has same name but different emailaddress.

                for (int i = 0; i != mRecipientsAddedFromContacts.count(); ++i) {

                    if (mRecipientsAddedFromContacts.at(i).displayName() == contactName &&

                  	    mRecipientsAddedFromContacts.at(i).address() != contactEmailAddress) {

                        // Differentiate this contact by supplying it's emailaddress

                        contactName.append("<");

                        contactName.append(contactEmailAddress);

                        contactName.append(">");

                    }

                }

                // Move cursor to the end of the lineedit.

                setCursorPosition(text().length());

                insertContactText(contactName);

            }

            // Form the contact into NmAddress format.

            NmAddress contact;

            contact.setAddress(contactEmailAddress);

            contact.setDisplayName(contactName);

            // Add this NmAddress formated contact into mRecipientsAddedFromContacts.

            mRecipientsAddedFromContacts.append(contact);

        }

    }

    else {

        //Request returned NULL

        NM_COMMENT("ContactsPicker request returned NULL.");

    }

}

Q_IMPLEMENT_USER_METATYPE(CntServicesContact)

Q_IMPLEMENT_USER_METATYPE_NO_OPERATORS(CntServicesContactList)

/*!

   keyPressEvent handles different keypress events, and reacts to them

*/

void NmRecipientLineEdit::keyPressEvent(QKeyEvent *keyEvent)

{

    NM_FUNCTION;

    if (keyEvent) {

        switch (keyEvent->key()) {

        case Qt::Key_Comma:

        case Qt::Key_Semicolon:

            keyPressEventSemicolon(keyEvent);

            break;

        case Qt::Key_Backspace:

        case Qt::Key_Delete:

            keyPressEventDelete(keyEvent);

            break;

        case Qt::Key_Left:

            keyPressEventLeft(keyEvent);

            break;

        case Qt::Key_Right:

            keyPressEventRight(keyEvent);

            break;

        default:

            NmHtmlLineEdit::keyPressEvent(keyEvent);

            break;

        } // switch

    keyEvent->accept();

    }

}

/*!

 * subroutine of keyPressEvent that handles semicolon and comma key presses

 */

void NmRecipientLineEdit::keyPressEventSemicolon(QKeyEvent *event)

{

    NM_FUNCTION;

    QString textBeforeCursor = (text()).left(cursorPosition());

    // No action when the lineedit is empty or cursor is after a Delimiter("; ")

    // or a Semicolon (";").

    if ((text()).isEmpty() || textBeforeCursor.endsWith(NmRecipientLineEditDelimiter)

        || textBeforeCursor.endsWith(NmRecipientLineEditSemicolon)) {

        event->ignore();

    }

    else {

        // Generate custom keyevent for Delimiter("; ") and

        // forward to the base class to handle.

        QKeyEvent delimiterKeyEvent(event->type(), event->key(),

                                    event->modifiers(), NmRecipientLineEditDelimiter);

        NmHtmlLineEdit::keyPressEvent(&delimiterKeyEvent);

    }

}

/*!

 * subroutine of keyPressEvent that handles delete and backspace key presses

 */

void NmRecipientLineEdit::keyPressEventDelete(QKeyEvent *event)

{

    NM_FUNCTION;

    int pos = cursorPosition();

    // 1) if selection exists, delete it

    if (hasSelectedText()) {

        // if already selected delete it

        disconnect(this, SIGNAL(textChanged(QString)),

                this, SLOT(handleTextChanged(QString)));

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

        HbLineEdit::keyPressEvent(&eve);

        connect(this, SIGNAL(textChanged(QString)),

                this, SLOT(handleTextChanged(QString)));

        setCursorPosition(text().length());

        handleTextChanged(text());

    } else { // no selection..

        // peek if earlier chars are underlined

        setCursorPosition(pos-2);

        bool isContact(textCursor().charFormat().fontUnderline());

        setCursorPosition(pos);

        if (isContact) {

            // contact

            setCursorPosition(pos-3);

            setHighlight(pos-3); // creates a selection for the current contact

        } else {

            // plain text

            HbLineEdit::keyPressEvent(event);

        }

    }

}

/*!

 * subroutine of keyPressEvent that handles left key presses

 */

void NmRecipientLineEdit::keyPressEventLeft(QKeyEvent *event)

{

    NM_FUNCTION;

    //look ahead left.

    int pos = cursorPosition();

    QString text = this->text();

    text = text.left(pos);

    //look for next seperator while going left.

    int semicolonPos = text.lastIndexOf(NmRecipientLineEditSemicolon);

    bool selectedText = hasSelectedText();

    if (selectedText) {

        int selectionStart = textCursor().selectionStart();

        if (selectionStart>=2) {

            setCursorPosition(selectionStart-2);

        }

        else {

            setCursorPosition(0);

        }

        textCursor().clearSelection();

    }

    else { // not selected

        setCursorPosition(pos-2);

        bool isContact = textCursor().charFormat().fontUnderline();

        setCursorPosition(pos);

        if (isContact) {

            setHighlight(pos-3);

        }

        else {

            if (pos-2  == semicolonPos) {

                setCursorPosition(pos-1); // jump over one extra char

            }

            HbLineEdit::keyPressEvent(event);

        }

    }

}

/*!

 * subroutine of keyPressEvent that handles right key presses

 */

void NmRecipientLineEdit::keyPressEventRight(QKeyEvent *event)

{

    NM_FUNCTION;

    bool selectedText = hasSelectedText();

    if (selectedText) {

        int selectionEnd = textCursor().selectionEnd();

        setCursorPosition(selectionEnd+1);

        textCursor().clearSelection();

    }

    else {

        int pos = cursorPosition();

        //look ahead

        setCursorPosition(pos+3);

        bool isContact = textCursor().charFormat().fontUnderline();

        setCursorPosition(pos);

        if (isContact) {

            setHighlight(pos+3);

        }

        else {

            int nextSemicolon = text().indexOf(NmRecipientLineEditSemicolon,pos);

            if (nextSemicolon==pos) {

                setCursorPosition(pos+1); // jump over one extra char

            }

        HbLineEdit::keyPressEvent(event);

        }

    }

}

/*!

   inputMethodEvent handles replacing user inputs "," or ";" from virtual keyboard with "; ".

   P.S. keyPressEvent can only catch QKeyEvent "," or ";" typed from physical keyboard

*/

void NmRecipientLineEdit::inputMethodEvent(QInputMethodEvent *event)

{

    NM_FUNCTION;

	bool eventHandled(false);

    if (event) {

        QString eventText = event->commitString();

        if (!eventText.isEmpty() || event->replacementLength()) {

            // If typed charater from virtual keyboard is "," or ";"

            if (eventText.contains(NmRecipientLineEditCommaOrSemicolon)) {

                QString textBeforeCursor = text().left(cursorPosition());

                // No action when the lineedit is empty or cursor is after a Delimiter("; ")

                // or Semicolon (";").

                if (text().isEmpty() || textBeforeCursor.endsWith(NmRecipientLineEditDelimiter) || textBeforeCursor.endsWith(NmRecipientLineEditSemicolon)) {

                    event->ignore();

                    eventHandled = true;

                }

                else {

                    // Modify event with Delimiter("; ") and forward to the base class to handle.

                    event->setCommitString(NmRecipientLineEditDelimiter, event->replacementStart(),

                                           event->replacementLength());

                    NmHtmlLineEdit::inputMethodEvent(event);

                    eventHandled = true;

                }

            }

        }

    }

    // If event is not handled, forward to the base class to handle.

    if (!eventHandled) {

        NmHtmlLineEdit::inputMethodEvent(event);

    }

}

/*!

 signal received from user screen input

 */

void NmRecipientLineEdit::gestureEvent(QGestureEvent* event)

{

    //passing gesture event to base class.

    HbLineEdit::gestureEvent(event);

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

        switch (tap->state()) {

        case Qt::GestureFinished:

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

                handleTap();

            }

            break;

        default:

            break;

        }

        event->accept();

    }

    else {

        event->ignore();

    }

}

/*!

 user has tapped the recipient field on the screen

 */

void NmRecipientLineEdit::handleTap()

{

    int currentPos = cursorPosition();

    QString txt = text();

    int previousSemicolonIndex = leftTxt.lastIndexOf(NmRecipientLineEditSemicolon,currentPos);

    if ((currentPos>0) &&

       (currentPos==previousSemicolonIndex || currentPos==previousSemicolonIndex+1)) {

        //pressed just on seperator

        setCursorPosition(previousSemicolonIndex+2);

    }

        // pressed in middle of an address

        if (textCursor().charFormat().fontUnderline()) {

            // This entry is a "contact"

        }

    }

}

/*!

   Generate a list of all the email addresses from the content of the lineedit.

*/

void NmRecipientLineEdit::generateEmailAddressList()

{

    NM_FUNCTION;

    // Remove whitespace from the start and the end of the lineedit content.

    QString contentOfLineedit = text().trimmed();

    // Split the lineedit content by semicolon(";").

    QStringList itemsOfLineeditContent = contentOfLineedit.split(NmRecipientLineEditSemicolon, QString::SkipEmptyParts);

    // Loop through all the items of the lineedit content.

    for (int i = 0; i != itemsOfLineeditContent.count(); ++i) {

        // Remove whitespace from the start and the end of the item.

        QString itemInLineedit = itemsOfLineeditContent.at(i).trimmed();

        // Get the count of the recipients added from Contacts.

        int countOfRecipientsAddedFromContacts = mRecipientsAddedFromContacts.count();

        // If there is recipient added from Contacts.

        if (countOfRecipientsAddedFromContacts > 0) {

            QStringList listOfAddedContactsName;

            QStringList listOfAddedContactsAddress;

            // Loop through all the recipients added from Contacts.

            for (int j = 0; j != countOfRecipientsAddedFromContacts; ++j) {

                NmAddress contact = mRecipientsAddedFromContacts.at(j);

                listOfAddedContactsName.append(contact.displayName());

                listOfAddedContactsAddress.append(contact.address());

            }

            int indexInAddedContactsName = listOfAddedContactsName.indexOf(itemInLineedit);

            int indexInAddedContactsAddress = listOfAddedContactsAddress.indexOf(itemInLineedit);

            // If this itemInLineedit matches the name of one added contact.

            if (indexInAddedContactsName >= 0) {

                // Add the recipient into mEmailAddressList.

                mEmailAddressList.append(mRecipientsAddedFromContacts.at(indexInAddedContactsName));

            }

            // If this itemInLineedit matches the emailaddress of one added contact.

            else if (indexInAddedContactsAddress >= 0) {

                // Add the recipient into mEmailAddressList.

                mEmailAddressList.append(mRecipientsAddedFromContacts.at(indexInAddedContactsAddress));

            }

            // This itemInLineedit is not added from Contacts

            else {

                // Form the item into NmAddress format.

                NmAddress recipient;

                recipient.setAddress(itemInLineedit);

                // There is no display name info available, so leave display name empty.

                recipient.setDisplayName(QString());

                // Add this NmAddress formated lineedit item into mEmailAddressList.

                mEmailAddressList.append(recipient);

            }

        }

        else { // There is no recipient is added from Contacts

            // Form the item into NmAddress format.

            NmAddress recipient;

            recipient.setAddress(itemInLineedit);

            // There is no display name info available, so leave display name emapty.

            recipient.setDisplayName(QString());

            // Add this NmAddress formated lineedit item into mEmailAddressList.

            mEmailAddressList.append(recipient);

        }

    }

}