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[pinentry.git] / qt4 / qsecurelineedit.cpp

/*
   qsecurelineedit.cpp - QLineEdit that uses secmem

   Copyright (C) 2008 Klarälvdalens Datakonsult AB (KDAB)

   Written by Marc Mutz <marc@kdab.com>.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/

// the following code has been ported from QString to secqstring.
// The licence of the original code:

/****************************************************************************
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** Licensees holding a valid Qt License Agreement may use this file in
** accordance with the rights, responsibilities and obligations
** contained therein.  Please consult your licensing agreement or
** contact sales@trolltech.com if any conditions of this licensing
** agreement are not clear to you.
**
** Further information about Qt licensing is available at:
** http://www.trolltech.com/products/qt/licensing.html or by
** contacting info@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "qlineedit.h" // added to pick up qt defines

#ifndef QT_NO_LINEEDIT
#include "qaction.h"
#include "qapplication.h"
#include "qclipboard.h"
#include "qdrag.h"
#include "qdrawutil.h"
#include "qevent.h"
#include "qfontmetrics.h"
#include "qmenu.h"
#include "qpainter.h"
#include "qpixmap.h"
#include "qpointer.h"
#include "qstringlist.h"
#include "qstyle.h"
#include "qstyleoption.h"
#include "qtimer.h"
#include "qvalidator.h"
#include "qvariant.h"
#include "qvector.h"
#include "qwhatsthis.h"
#include "qdebug.h"
#include "qtextedit.h"
//#include <private/qtextedit_p.h>
#ifndef QT_NO_ACCESSIBILITY
#include "qaccessible.h"
#endif
#ifndef QT_NO_IM
#include "qinputcontext.h"
#include "qlist.h"
#endif
#include "qabstractitemview.h"
#ifdef QT_NO_STYLE_STYLESHEET
#include "private/qstylesheetstyle_p.h"
#endif

#ifndef QT_NO_SHORTCUT
#include "qkeysequence.h"
#define ACCEL_KEY(k) QLatin1String("\t") + QString(QKeySequence(k))
#else
#define ACCEL_KEY(k) QString()
#endif

#include <limits.h>

// these go last so they don't contaminate other Qt headers
#include "qsecurelineedit_p.h"
#include "qsecurelineedit.h"

#define verticalMargin 1
#define horizontalMargin 2

QT_BEGIN_NAMESPACE

#ifdef Q_WS_MAC
extern void qt_mac_secure_keyboard(bool); //qapplication_mac.cpp
#endif

/*!
    Initialize \a option with the values from this QSecureLineEdit. This method
    is useful for subclasses when they need a QStyleOptionFrame or QStyleOptionFrameV2, but don't want
    to fill in all the information themselves. This function will check the version
    of the QStyleOptionFrame and fill in the additional values for a
    QStyleOptionFrameV2.

    \sa QStyleOption::initFrom()
*/
void QSecureLineEdit::initStyleOption(QStyleOptionFrame *option) const
{
    if (!option)
        return;

    Q_D(const QSecureLineEdit);
    option->initFrom(this);
    option->rect = contentsRect();
    option->lineWidth = d->frame ? style()->pixelMetric(QStyle::PM_DefaultFrameWidth, option, this)
                                 : 0;
    option->midLineWidth = 0;
    option->state |= QStyle::State_Sunken;
    if (d->readOnly)
        option->state |= QStyle::State_ReadOnly;
#ifdef QT_KEYPAD_NAVIGATION
    if (hasEditFocus())
        option->state |= QStyle::State_HasEditFocus;
#endif
    if (QStyleOptionFrameV2 *optionV2 = qstyleoption_cast<QStyleOptionFrameV2 *>(option))
        optionV2->features = QStyleOptionFrameV2::None;
}

/*!
    \class QSecureLineEdit
    \brief The QSecureLineEdit widget is a one-line text editor.

    \ingroup basicwidgets
    \mainclass

    A line edit allows the user to enter and edit a single line of
    plain text with a useful collection of editing functions,
    including undo and redo, cut and paste, and drag and drop.

    By changing the echoMode() of a line edit, it can also be used as
    a "write-only" field, for inputs such as passwords.

    The length of the text can be constrained to maxLength(). The text
    can be arbitrarily constrained using a validator() or an
    inputMask(), or both.

    A related class is QTextEdit which allows multi-line, rich text
    editing.

    You can change the text with setText() or insert(). The text is
    retrieved with text(); the displayed text (which may be different,
    see \l{EchoMode}) is retrieved with displayText(). Text can be
    selected with setSelection() or selectAll(), and the selection can
    be cut(), copy()ied and paste()d. The text can be aligned with
    setAlignment().

    When the text changes the textChanged() signal is emitted; when
    the text changes other than by calling setText() the textEdited()
    signal is emitted; when the cursor is moved the
    cursorPositionChanged() signal is emitted; and when the Return or
    Enter key is pressed the returnPressed() signal is emitted.

    When editing is finished, either because the line edit lost focus
    or Return/Enter is pressed the editingFinished() signal is
    emitted.

    Note that if there is a validator set on the line edit, the
    returnPressed()/editingFinished() signals will only be emitted if
    the validator returns QValidator::Acceptable.

    By default, QSecureLineEdits have a frame as specified by the Windows
    and Motif style guides; you can turn it off by calling
    setFrame(false).

    The default key bindings are described below. The line edit also
    provides a context menu (usually invoked by a right mouse click)
    that presents some of these editing options.
    \target desc
    \table
    \header \i Keypress \i Action
    \row \i Left Arrow \i Moves the cursor one character to the left.
    \row \i Shift+Left Arrow \i Moves and selects text one character to the left.
    \row \i Right Arrow \i Moves the cursor one character to the right.
    \row \i Shift+Right Arrow \i Moves and selects text one character to the right.
    \row \i Home \i Moves the cursor to the beginning of the line.
    \row \i End \i Moves the cursor to the end of the line.
    \row \i Backspace \i Deletes the character to the left of the cursor.
    \row \i Ctrl+Backspace \i Deletes the word to the left of the cursor.
    \row \i Delete \i Deletes the character to the right of the cursor.
    \row \i Ctrl+Delete \i Deletes the word to the right of the cursor.
    \row \i Ctrl+A \i Select all.
    \row \i Ctrl+C \i Copies the selected text to the clipboard.
    \row \i Ctrl+Insert \i Copies the selected text to the clipboard.
    \row \i Ctrl+K \i Deletes to the end of the line.
    \row \i Ctrl+V \i Pastes the clipboard text into line edit.
    \row \i Shift+Insert \i Pastes the clipboard text into line edit.
    \row \i Ctrl+X \i Deletes the selected text and copies it to the clipboard.
    \row \i Shift+Delete \i Deletes the selected text and copies it to the clipboard.
    \row \i Ctrl+Z \i Undoes the last operation.
    \row \i Ctrl+Y \i Redoes the last undone operation.
    \endtable

    Any other key sequence that represents a valid character, will
    cause the character to be inserted into the line edit.

    \table 100%
    \row \o \inlineimage macintosh-lineedit.png Screenshot of a Macintosh style line edit
         \o A line edit shown in the \l{Macintosh Style Widget Gallery}{Macintosh widget style}.
    \row \o \inlineimage windows-lineedit.png Screenshot of a Windows XP style line edit
         \o A line edit shown in the \l{Windows XP Style Widget Gallery}{Windows XP widget style}.
    \row \o \inlineimage plastique-lineedit.png Screenshot of a Plastique style line edit
         \o A line edit shown in the \l{Plastique Style Widget Gallery}{Plastique widget style}.
    \endtable

    \sa QTextEdit, QLabel, QComboBox, {fowler}{GUI Design Handbook: Field, Entry}, {Line Edits Example}
*/


/*!
    \fn void QSecureLineEdit::textChanged(const QString &text)

    This signal is emitted whenever the text changes. The \a text
    argument is the new text.

    Unlike textEdited(), this signal is also emitted when the text is
    changed programmatically, for example, by calling setText().
*/

/*!
    \fn void QSecureLineEdit::textEdited(const QString &text)

    This signal is emitted whenever the text is edited. The \a text
    argument is the next text.

    Unlike textChanged(), this signal is not emitted when the text is
    changed programmatically, for example, by calling setText().
*/

/*!
    \fn void QSecureLineEdit::cursorPositionChanged(int old, int new)

    This signal is emitted whenever the cursor moves. The previous
    position is given by \a old, and the new position by \a new.

    \sa setCursorPosition(), cursorPosition()
*/

/*!
    \fn void QSecureLineEdit::selectionChanged()

    This signal is emitted whenever the selection changes.

    \sa hasSelectedText(), selectedText()
*/

/*!
    Constructs a line edit with no text.

    The maximum text length is set to 32767 characters.

    The \a parent argument is sent to the QWidget constructor.

    \sa setText(), setMaxLength()
*/
QSecureLineEdit::QSecureLineEdit(QWidget* parent)
    : QWidget(parent,0), m_d(new QSecureLineEditPrivate(this))
{
    Q_D(QSecureLineEdit);
    d->init(secqstring());
}

/*!
    Constructs a line edit containing the text \a contents.

    The cursor position is set to the end of the line and the maximum
    text length to 32767 characters.

    The \a parent and argument is sent to the QWidget
    constructor.

    \sa text(), setMaxLength()
*/
QSecureLineEdit::QSecureLineEdit(const secqstring& contents, QWidget* parent)
    : QWidget(parent, 0), m_d(new QSecureLineEditPrivate(this))
{
    Q_D(QSecureLineEdit);
    d->init(contents);
}


#ifdef QT3_SUPPORT
/*!
    Constructs a line edit with no text.

    The maximum text length is set to 32767 characters.

    The \a parent and \a name arguments are sent to the QWidget constructor.

    \sa setText(), setMaxLength()
*/
QSecureLineEdit::QSecureLineEdit(QWidget* parent, const char* name)
    : QWidget(parent,0), m_d(new QSecureLineEditPrivate(this))
{
    Q_D(QSecureLineEdit);
    setObjectName(QString::fromAscii(name));
    d->init(secqstring());
}

/*!
    Constructs a line edit containing the text \a contents.

    The cursor position is set to the end of the line and the maximum
    text length to 32767 characters.

    The \a parent and \a name arguments are sent to the QWidget
    constructor.

    \sa text(), setMaxLength()
*/

QSecureLineEdit::QSecureLineEdit(const secqstring& contents, QWidget* parent, const char* name)
    : QWidget(parent, 0), m_d(new QSecureLineEditPrivate(this))
{
    Q_D(QSecureLineEdit);
    setObjectName(QString::fromAscii(name));
    d->init(contents);
}

/*!
    Constructs a line edit with an input \a inputMask and the text \a
    contents.

    The cursor position is set to the end of the line and the maximum
    text length is set to the length of the mask (the number of mask
    characters and separators).

    The \a parent and \a name arguments are sent to the QWidget
    constructor.

    \sa setMask() text()
*/
QSecureLineEdit::QSecureLineEdit(const QString& contents, const QString &inputMask, QWidget* parent, const char* name)
    : QWidget(parent, 0), m_d(new QSecureLineEditPrivate(this))
{
    Q_D(QSecureLineEdit);
    setObjectName(QString::fromAscii(name));
    d->parseInputMask(inputMask);
    if (d->maskData) {
        QString ms = d->maskString(0, contents);
        d->init(ms + d->clearString(ms.length(), d->maxLength - ms.length()));
        d->cursor = d->nextMaskBlank(ms.length());
    } else {
        d->init(contents);
    }
}
#endif

/*!
    Destroys the line edit.
*/

QSecureLineEdit::~QSecureLineEdit()
{
    delete m_d;
}


/*!
    \property QSecureLineEdit::text
    \brief the line edit's text

    Setting this property clears the selection, clears the undo/redo
    history, moves the cursor to the end of the line and resets the
    \l modified property to false. The text is not validated when
    inserted with setText().

    The text is truncated to maxLength() length.

    \sa insert(), clear()
*/
secqstring QSecureLineEdit::text() const
{
    Q_D(const QSecureLineEdit);
    secqstring res = d->text;
    if (d->maskData)
        res = d->stripString(d->text);
    return res;//(res.isNull() ? QString::fromLatin1("") : res);
}

void QSecureLineEdit::setText(const secqstring& text)
{
    Q_D(QSecureLineEdit);
    d->setText(text, -1, false);
#ifdef QT_KEYPAD_NAVIGATION
    d->origText = d->text;
#endif
}


/*!
    \property QSecureLineEdit::displayText
    \brief the displayed text

    If \l echoMode is \l Normal this returns the same as text(); if
    \l EchoMode is \l Password or \l PasswordEchoOnEdit it returns a string of asterisks
    text().length() characters long, e.g. "******"; if \l EchoMode is
    \l NoEcho returns an empty string, "".

    \sa setEchoMode() text() EchoMode
*/

secqstring QSecureLineEdit::displayText() const
{
    Q_D(const QSecureLineEdit);
    if (d->echoMode == NoEcho)
        return secqstring();
    secqstring res = d->text;

    if (d->echoMode == Password || d->echoMode == PasswordEchoOnEdit) {
        QStyleOptionFrameV2 opt;
        initStyleOption(&opt);
        return secqstring( res.size(), style()->styleHint(QStyle::SH_LineEdit_PasswordCharacter, &opt, this) );
        //res.fill(style()->styleHint(QStyle::SH_LineEdit_PasswordCharacter, &opt, this));
    }
    return res;//(res.isNull() ? QString::fromLatin1("") : res);
}


/*!
    \property QSecureLineEdit::maxLength
    \brief the maximum permitted length of the text

    If the text is too long, it is truncated at the limit.

    If truncation occurs any selected text will be unselected, the
    cursor position is set to 0 and the first part of the string is
    shown.

    If the line edit has an input mask, the mask defines the maximum
    string length.

    \sa inputMask
*/

int QSecureLineEdit::maxLength() const
{
    Q_D(const QSecureLineEdit);
    return d->maxLength;
}

void QSecureLineEdit::setMaxLength(int maxLength)
{
    Q_D(QSecureLineEdit);
    if (d->maskData)
        return;
    d->maxLength = maxLength;
    setText(d->text);
}



/*!
    \property QSecureLineEdit::frame
    \brief whether the line edit draws itself with a frame

    If enabled (the default) the line edit draws itself inside a
    frame, otherwise the line edit draws itself without any frame.
*/
bool QSecureLineEdit::hasFrame() const
{
    Q_D(const QSecureLineEdit);
    return d->frame;
}


void QSecureLineEdit::setFrame(bool enable)
{
    Q_D(QSecureLineEdit);
    d->frame = enable;
    update();
    updateGeometry();
}


/*!
    \enum QSecureLineEdit::EchoMode

    This enum type describes how a line edit should display its
    contents.

    \value Normal   Display characters as they are entered. This is the
                    default.
    \value NoEcho   Do not display anything. This may be appropriate
                    for passwords where even the length of the
                    password should be kept secret.
    \value Password  Display asterisks instead of the characters
                    actually entered.
    \value PasswordEchoOnEdit Display characters as they are entered
                    while editing otherwise display asterisks.

    \sa setEchoMode() echoMode()
*/


/*!
    \property QSecureLineEdit::echoMode
    \brief the line edit's echo mode

    The initial setting is \l Normal, but QSecureLineEdit also supports \l
    NoEcho, \l Password and \l PasswordEchoOnEdit modes.

    The widget's display and the ability to copy or drag the text is
    affected by this setting.

    \sa EchoMode displayText()
*/

QSecureLineEdit::EchoMode QSecureLineEdit::echoMode() const
{
    Q_D(const QSecureLineEdit);
    return (EchoMode) d->echoMode;
}

void QSecureLineEdit::setEchoMode(EchoMode mode)
{
    Q_D(QSecureLineEdit);
    if(mode == (EchoMode)d->echoMode)
        return;
    setAttribute(Qt::WA_InputMethodEnabled, mode == Normal || mode == PasswordEchoOnEdit);
    d->echoMode = mode;
    d->updateTextLayout();
    update();
#ifdef Q_WS_MAC
    if (hasFocus())
        qt_mac_secure_keyboard(d->echoMode == Password || d->echoMode == NoEcho);
#endif
}


#ifndef QT_NO_VALIDATOR
/*!
    Returns a pointer to the current input validator, or 0 if no
    validator has been set.

    \sa setValidator()
*/

const QValidator * QSecureLineEdit::validator() const
{
    Q_D(const QSecureLineEdit);
    return d->validator;
}

/*!
    Sets this line edit to only accept input that the validator, \a v,
    will accept. This allows you to place any arbitrary constraints on
    the text which may be entered.

    If \a v == 0, setValidator() removes the current input validator.
    The initial setting is to have no input validator (i.e. any input
    is accepted up to maxLength()).

    \sa validator() QIntValidator QDoubleValidator QRegExpValidator
*/

void QSecureLineEdit::setValidator(const QValidator *v)
{
    Q_D(QSecureLineEdit);
    d->validator = const_cast<QValidator*>(v);
}
#endif // QT_NO_VALIDATOR

#ifndef QT_NO_COMPLETER
/*!
    \since 4.2

    Sets this line edit to provide auto completions from the completer, \a c.
    The completion mode is set using QCompleter::setCompletionMode().

    To use a QCompleter with a QValidator or QSecureLineEdit::inputMask, you need to
    ensure that the model provided to QCompleter contains valid entries. You can
    use the QSortFilterProxyModel to ensure that the QCompleter's model contains
    only valid entries.

    If \a c == 0, setCompleter() removes the current completer, effectively
    disabling auto completion.

    \sa QCompleter
*/
void QSecureLineEdit::setCompleter(QCompleter *c)
{
    Q_D(QSecureLineEdit);
    if (c == d->completer)
        return;
    if (d->completer) {
        disconnect(d->completer, 0, this, 0);
        d->completer->setWidget(0);
        if (d->completer->parent() == this)
            delete d->completer;
    }
    d->completer = c;
    if (!c)
        return;
    if (c->widget() == 0)
        c->setWidget(this);
    if (hasFocus()) {
        QObject::connect(d->completer, SIGNAL(activated(QString)),
                         this, SLOT(setText(QString)));
        QObject::connect(d->completer, SIGNAL(highlighted(QString)),
                         this, SLOT(_q_completionHighlighted(QString)));
    }
}

/*!
    \since 4.2

    Returns the current QCompleter that provides completions.
*/
QCompleter *QSecureLineEdit::completer() const
{
    Q_D(const QSecureLineEdit);
    return d->completer;
}

// looks for an enabled item iterating forward(dir=1)/backward(dir=-1) from the
// current row based. dir=0 indicates a new completion prefix was set.
bool QSecureLineEditPrivate::advanceToEnabledItem(int dir)
{
    int start = completer->currentRow();
    if (start == -1)
        return false;
    int i = start + dir;
    if (dir == 0) dir = 1;
    do {
        if (!completer->setCurrentRow(i)) {
            if (!completer->wrapAround())
                break;
            i = i > 0 ? 0 : completer->completionCount() - 1;
        } else {
            QModelIndex currentIndex = completer->currentIndex();
            if (completer->completionModel()->flags(currentIndex) & Qt::ItemIsEnabled)
                return true;
            i += dir;
        }
    } while (i != start);

    completer->setCurrentRow(start); // restore
    return false;
}

void QSecureLineEditPrivate::complete(int key)
{
    if (!completer || readOnly || echoMode != QSecureLineEdit::Normal)
        return;

    if (completer->completionMode() == QCompleter::InlineCompletion) {
        if (key == Qt::Key_Backspace)
            return;
        int n = 0;
        if (key == Qt::Key_Up || key == Qt::Key_Down) {
            if (selend != 0 && selend != text.length())
                return;
            QString prefix = hasSelectedText() ? text.left(selstart) : text;
            if (text.compare(completer->currentCompletion(), completer->caseSensitivity()) != 0
                || prefix.compare(completer->completionPrefix(), completer->caseSensitivity()) != 0) {
                completer->setCompletionPrefix(prefix);
            } else {
                n = (key == Qt::Key_Up) ? -1 : +1;
            }
        } else {
            completer->setCompletionPrefix(text);
        }
        if (!advanceToEnabledItem(n))
            return;
    } else {
#ifndef QT_KEYPAD_NAVIGATION
        if (text.isEmpty()) {
            completer->popup()->hide();
            return;
        }
#endif
        completer->setCompletionPrefix(text);
    }

    completer->complete();
}

void QSecureLineEditPrivate::_q_completionHighlighted(QString newText)
{
    Q_Q(QSecureLineEdit);
    if (completer->completionMode() != QCompleter::InlineCompletion)
        q->setText(newText);
    else {
        int c = cursor;
        q->setText(text.left(c) + newText.mid(c));
        q->setSelection(text.length(), c - newText.length());
    }
}
#endif // QT_NO_COMPLETER

/*!
    Returns a recommended size for the widget.

    The width returned, in pixels, is usually enough for about 15 to
    20 characters.
*/

QSize QSecureLineEdit::sizeHint() const
{
    Q_D(const QSecureLineEdit);
    ensurePolished();
    QFontMetrics fm(font());
    int leftmargin, topmargin, rightmargin, bottommargin;
    getContentsMargins( &leftmargin, &topmargin, &rightmargin, &bottommargin );
    int h = qMax(fm.lineSpacing(), 14) + 2*verticalMargin
            + topmargin + bottommargin;
    int w = fm.width(QLatin1Char('x')) * 17 + 2*horizontalMargin
            + leftmargin + rightmargin; // "some"
    QStyleOptionFrameV2 opt;
    initStyleOption(&opt);
    return (style()->sizeFromContents(QStyle::CT_LineEdit, &opt, QSize(w, h).
                                      expandedTo(QApplication::globalStrut()), this));
}


/*!
    Returns a minimum size for the line edit.

    The width returned is enough for at least one character.
*/

QSize QSecureLineEdit::minimumSizeHint() const
{
    Q_D(const QSecureLineEdit);
    ensurePolished();
    QFontMetrics fm = fontMetrics();
    int leftmargin, topmargin, rightmargin, bottommargin;
    getContentsMargins( &leftmargin, &topmargin, &rightmargin, &bottommargin );
    int h = fm.height() + qMax(2*verticalMargin, fm.leading())
            + topmargin + bottommargin;
    int w = fm.maxWidth() + leftmargin + rightmargin;
    QStyleOptionFrameV2 opt;
    initStyleOption(&opt);
    return (style()->sizeFromContents(QStyle::CT_LineEdit, &opt, QSize(w, h).
                                      expandedTo(QApplication::globalStrut()), this));
}


/*!
    \property QSecureLineEdit::cursorPosition
    \brief the current cursor position for this line edit

    Setting the cursor position causes a repaint when appropriate.
*/

int QSecureLineEdit::cursorPosition() const
{
    Q_D(const QSecureLineEdit);
    return d->cursor;
}

void QSecureLineEdit::setCursorPosition(int pos)
{
    Q_D(QSecureLineEdit);
    if (pos < 0)
        pos = 0;

    if (pos <= d->text.length())
        d->moveCursor(pos);
}

/*!
    Returns the cursor position under the point \a pos.
*/
// ### What should this do if the point is outside of contentsRect? Currently returns 0.
int QSecureLineEdit::cursorPositionAt(const QPoint &pos)
{
    Q_D(QSecureLineEdit);
    return d->xToPos(pos.x());
}


#ifdef QT3_SUPPORT
/*! \obsolete

    Use setText(), setCursorPosition() and setSelection() instead.
*/
bool QSecureLineEdit::validateAndSet(const QString &newText, int newPos,
                                 int newMarkAnchor, int newMarkDrag)
{
    Q_D(QSecureLineEdit);
    int priorState = d->undoState;
    d->selstart = 0;
    d->selend = d->text.length();
    d->removeSelectedText();
    d->insert(newText);
    d->finishChange(priorState);
    if (d->undoState > priorState) {
        d->cursor = newPos;
        d->selstart = qMin(newMarkAnchor, newMarkDrag);
        d->selend = qMax(newMarkAnchor, newMarkDrag);
        update();
        d->emitCursorPositionChanged();
        return true;
    }
    return false;
}
#endif //QT3_SUPPORT

/*!
    \property QSecureLineEdit::alignment
    \brief the alignment of the line edit

    Both horizontal and vertical alignment is allowed here, Qt::AlignJustify
    will map to Qt::AlignLeft.

    \sa Qt::Alignment
*/

Qt::Alignment QSecureLineEdit::alignment() const
{
    Q_D(const QSecureLineEdit);
    return QFlag(d->alignment);
}

void QSecureLineEdit::setAlignment(Qt::Alignment alignment)
{
    Q_D(QSecureLineEdit);
    d->alignment = alignment;
    update();
}


/*!
    Moves the cursor forward \a steps characters. If \a mark is true
    each character moved over is added to the selection; if \a mark is
    false the selection is cleared.

    \sa cursorBackward()
*/

void QSecureLineEdit::cursorForward(bool mark, int steps)
{
    Q_D(QSecureLineEdit);
    int cursor = d->cursor;
    if (steps > 0) {
        while(steps--)
            cursor = d->textLayout.nextCursorPosition(cursor);
    } else if (steps < 0) {
        while (steps++)
            cursor = d->textLayout.previousCursorPosition(cursor);
    }
    d->moveCursor(cursor, mark);
}


/*!
    Moves the cursor back \a steps characters. If \a mark is true each
    character moved over is added to the selection; if \a mark is
    false the selection is cleared.

    \sa cursorForward()
*/
void QSecureLineEdit::cursorBackward(bool mark, int steps)
{
    cursorForward(mark, -steps);
}

/*!
    Moves the cursor one word forward. If \a mark is true, the word is
    also selected.

    \sa cursorWordBackward()
*/
void QSecureLineEdit::cursorWordForward(bool mark)
{
    Q_D(QSecureLineEdit);
    d->moveCursor(d->textLayout.nextCursorPosition(d->cursor, QTextLayout::SkipWords), mark);
}

/*!
    Moves the cursor one word backward. If \a mark is true, the word
    is also selected.

    \sa cursorWordForward()
*/

void QSecureLineEdit::cursorWordBackward(bool mark)
{
    Q_D(QSecureLineEdit);
    d->moveCursor(d->textLayout.previousCursorPosition(d->cursor, QTextLayout::SkipWords), mark);
}


/*!
    If no text is selected, deletes the character to the left of the
    text cursor and moves the cursor one position to the left. If any
    text is selected, the cursor is moved to the beginning of the
    selected text and the selected text is deleted.

    \sa del()
*/
void QSecureLineEdit::backspace()
{
    Q_D(QSecureLineEdit);
    int priorState = d->undoState;
    if (d->hasSelectedText()) {
        d->removeSelectedText();
    } else if (d->cursor) {
            --d->cursor;
            if (d->maskData)
                d->cursor = d->prevMaskBlank(d->cursor);
            QChar uc = d->text.at(d->cursor);
            if (d->cursor > 0 && uc.unicode() >= 0xdc00 && uc.unicode() < 0xe000) {
                // second half of a surrogate, check if we have the first half as well,
                // if yes delete both at once
                uc = d->text.at(d->cursor - 1);
                if (uc.unicode() >= 0xd800 && uc.unicode() < 0xdc00) {
                    d->del(true);
                    --d->cursor;
                }
            }
            d->del(true);
    }
    d->finishChange(priorState);
}

/*!
    If no text is selected, deletes the character to the right of the
    text cursor. If any text is selected, the cursor is moved to the
    beginning of the selected text and the selected text is deleted.

    \sa backspace()
*/

void QSecureLineEdit::del()
{
    Q_D(QSecureLineEdit);
    int priorState = d->undoState;
    if (d->hasSelectedText()) {
        d->removeSelectedText();
    } else {
        int n = d->textLayout.nextCursorPosition(d->cursor) - d->cursor;
        while (n--)
            d->del();
    }
    d->finishChange(priorState);
}

/*!
    Moves the text cursor to the beginning of the line unless it is
    already there. If \a mark is true, text is selected towards the
    first position; otherwise, any selected text is unselected if the
    cursor is moved.

    \sa end()
*/

void QSecureLineEdit::home(bool mark)
{
    Q_D(QSecureLineEdit);
    d->moveCursor(0, mark);
}

/*!
    Moves the text cursor to the end of the line unless it is already
    there. If \a mark is true, text is selected towards the last
    position; otherwise, any selected text is unselected if the cursor
    is moved.

    \sa home()
*/

void QSecureLineEdit::end(bool mark)
{
    Q_D(QSecureLineEdit);
    d->moveCursor(d->text.length(), mark);
}


/*!
    \property QSecureLineEdit::modified
    \brief whether the line edit's contents has been modified by the user

    The modified flag is never read by QSecureLineEdit; it has a default value
    of false and is changed to true whenever the user changes the line
    edit's contents.

    This is useful for things that need to provide a default value but
    do not start out knowing what the default should be (perhaps it
    depends on other fields on the form). Start the line edit without
    the best default, and when the default is known, if modified()
    returns false (the user hasn't entered any text), insert the
    default value.

    Calling setText() resets the modified flag to false.
*/

bool QSecureLineEdit::isModified() const
{
    Q_D(const QSecureLineEdit);
    return d->modifiedState != d->undoState;
}

void QSecureLineEdit::setModified(bool modified)
{
    Q_D(QSecureLineEdit);
    if (modified)
        d->modifiedState = -1;
    else
        d->modifiedState = d->undoState;
}


/*!\fn QSecureLineEdit::clearModified()

Use setModified(false) instead.

    \sa isModified()
*/


/*!
    \property QSecureLineEdit::hasSelectedText
    \brief whether there is any text selected

    hasSelectedText() returns true if some or all of the text has been
    selected by the user; otherwise returns false.

    \sa selectedText()
*/


bool QSecureLineEdit::hasSelectedText() const
{
    Q_D(const QSecureLineEdit);
    return d->hasSelectedText();
}

/*!
    \property QSecureLineEdit::selectedText
    \brief the selected text

    If there is no selected text this property's value is
    an empty string.

    \sa hasSelectedText()
*/

secqstring QSecureLineEdit::selectedText() const
{
    Q_D(const QSecureLineEdit);
    if (d->hasSelectedText())
        return d->text.substr(d->selstart, d->selend - d->selstart);
    return secqstring();
}

/*!
    selectionStart() returns the index of the first selected character in the
    line edit or -1 if no text is selected.

    \sa selectedText()
*/

int QSecureLineEdit::selectionStart() const
{
    Q_D(const QSecureLineEdit);
    return d->hasSelectedText() ? d->selstart : -1;
}


#ifdef QT3_SUPPORT

/*!
    \fn void QSecureLineEdit::lostFocus()

    This signal is emitted when the line edit has lost focus.

    Use editingFinished() instead
    \sa editingFinished(), returnPressed()
*/

/*!
    Use isModified() instead.
*/
bool QSecureLineEdit::edited() const { return isModified(); }
/*!
    Use setModified()  or setText().
*/
void QSecureLineEdit::setEdited(bool on) { setModified(on); }

/*!
    There exists no equivalent functionality in Qt 4.
*/
int QSecureLineEdit::characterAt(int xpos, QChar *chr) const
{
    Q_D(const QSecureLineEdit);
    int pos = d->xToPos(xpos + contentsRect().x() - d->hscroll + horizontalMargin);
    if (chr && pos < (int) d->text.length())
        *chr = d->text.at(pos);
    return pos;

}

/*!
    Use selectedText() and selectionStart() instead.
*/
bool QSecureLineEdit::getSelection(int *start, int *end)
{
    Q_D(QSecureLineEdit);
    if (d->hasSelectedText() && start && end) {
        *start = d->selstart;
        *end = d->selend;
        return true;
    }
    return false;
}
#endif


/*!
    Selects text from position \a start and for \a length characters.
    Negative lengths are allowed.

    \sa deselect() selectAll() selectedText()
*/

void QSecureLineEdit::setSelection(int start, int length)
{
    Q_D(QSecureLineEdit);
    if (start < 0 || start > (int)d->text.length()) {
        qWarning("QSecureLineEdit::setSelection: Invalid start position (%d)", start);
        return;
    } else {
        if (length > 0) {
            d->selstart = start;
            d->selend = qMin(start + length, (int)d->text.length());
            d->cursor = d->selend;
        } else {
            d->selstart = qMax(start + length, 0);
            d->selend = start;
            d->cursor = d->selstart;
        }
    }

    if (d->hasSelectedText()){
        QStyleOptionFrameV2 opt;
        initStyleOption(&opt);
        if (!style()->styleHint(QStyle::SH_BlinkCursorWhenTextSelected, &opt, this))
            d->setCursorVisible(false);
    }

    update();
    d->emitCursorPositionChanged();
}


/*!
    \property QSecureLineEdit::undoAvailable
    \brief whether undo is available
*/

bool QSecureLineEdit::isUndoAvailable() const
{
    Q_D(const QSecureLineEdit);
    return d->isUndoAvailable();
}

/*!
    \property QSecureLineEdit::redoAvailable
    \brief whether redo is available
*/

bool QSecureLineEdit::isRedoAvailable() const
{
    Q_D(const QSecureLineEdit);
    return d->isRedoAvailable();
}

/*!
    \property QSecureLineEdit::dragEnabled
    \brief whether the lineedit starts a drag if the user presses and
    moves the mouse on some selected text

    Dragging is disabled by default.
*/

bool QSecureLineEdit::dragEnabled() const
{
    Q_D(const QSecureLineEdit);
    return d->dragEnabled;
}

void QSecureLineEdit::setDragEnabled(bool b)
{
    Q_D(QSecureLineEdit);
    d->dragEnabled = b;
}


/*!
    \property QSecureLineEdit::acceptableInput
    \brief whether the input satisfies the inputMask and the
    validator.

    \sa setInputMask(), setValidator()
*/
bool QSecureLineEdit::hasAcceptableInput() const
{
    Q_D(const QSecureLineEdit);
    return d->hasAcceptableInput(d->text);
}

/*!
    \property QSecureLineEdit::inputMask
    \brief The validation input mask

    If no mask is set, inputMask() returns an empty string.

    Sets the QSecureLineEdit's validation mask. Validators can be used
    instead of, or in conjunction with masks; see setValidator().

    Unset the mask and return to normal QSecureLineEdit operation by passing
    an empty string ("") or just calling setInputMask() with no
    arguments.

    The table below shows the characters that can be used in an input mask.
    A space character, the default character for a blank, is needed for cases
    where a character is \e{permitted but not required}.

    \table
    \header \i Character \i Meaning
    \row \i \c A \i ASCII alphabetic character required. A-Z, a-z.
    \row \i \c a \i ASCII alphabetic character permitted but not required.
    \row \i \c N \i ASCII alphanumeric character required. A-Z, a-z, 0-9.
    \row \i \c n \i ASCII alphanumeric character permitted but not required.
    \row \i \c X \i Any character required.
    \row \i \c x \i Any character permitted but not required.
    \row \i \c 9 \i ASCII digit required. 0-9.
    \row \i \c 0 \i ASCII digit permitted but not required.
    \row \i \c D \i ASCII digit required. 1-9.
    \row \i \c d \i ASCII digit permitted but not required (1-9).
    \row \i \c # \i ASCII digit or plus/minus sign permitted but not required.
    \row \i \c H \i Hexadecimal character required. A-F, a-f, 0-9.
    \row \i \c h \i Hexadecimal character permitted but not required.
    \row \i \c B \i Binary character required. 0-1.
    \row \i \c b \i Binary character permitted but not required.
    \row \i \c > \i All following alphabetic characters are uppercased.
    \row \i \c < \i All following alphabetic characters are lowercased.
    \row \i \c ! \i Switch off case conversion.
    \row \i \tt{\\} \i Use \tt{\\} to escape the special
                           characters listed above to use them as
                           separators.
    \endtable

    The mask consists of a string of mask characters and separators,
    optionally followed by a semicolon and the character used for
    blanks. The blank characters are always removed from the text
    after editing.

    Examples:
    \table
    \header \i Mask \i Notes
    \row \i \c 000.000.000.000;_ \i IP address; blanks are \c{_}.
    \row \i \c HH:HH:HH:HH:HH:HH;_ \i MAC address
    \row \i \c 0000-00-00 \i ISO Date; blanks are \c space
    \row \i \c >AAAAA-AAAAA-AAAAA-AAAAA-AAAAA;# \i License number;
    blanks are \c - and all (alphabetic) characters are converted to
    uppercase.
    \endtable

    To get range control (e.g. for an IP address) use masks together
    with \link setValidator() validators\endlink.

    \sa maxLength
*/
QString QSecureLineEdit::inputMask() const
{
    Q_D(const QSecureLineEdit);
    return (d->maskData ? d->inputMask + QLatin1Char(';') + d->blank : QString());
}

void QSecureLineEdit::setInputMask(const QString &inputMask)
{
    Q_D(QSecureLineEdit);
    d->parseInputMask(inputMask);
    if (d->maskData)
        d->moveCursor(d->nextMaskBlank(0));
}

/*!
    Selects all the text (i.e. highlights it) and moves the cursor to
    the end. This is useful when a default value has been inserted
    because if the user types before clicking on the widget, the
    selected text will be deleted.

    \sa setSelection() deselect()
*/

void QSecureLineEdit::selectAll()
{
    Q_D(QSecureLineEdit);
    d->selstart = d->selend = d->cursor = 0;
    d->moveCursor(d->text.length(), true);
}

/*!
    Deselects any selected text.

    \sa setSelection() selectAll()
*/

void QSecureLineEdit::deselect()
{
    Q_D(QSecureLineEdit);
    d->deselect();
    d->finishChange();
}


/*!
    Deletes any selected text, inserts \a newText, and validates the
    result. If it is valid, it sets it as the new contents of the line
    edit.

    \sa setText(), clear()
*/
void QSecureLineEdit::insert(const secqstring &newText)
{
//     q->resetInputContext(); //#### FIX ME IN QT
    Q_D(QSecureLineEdit);
    int priorState = d->undoState;
    d->removeSelectedText();
    d->insert(newText);
    d->finishChange(priorState);
}

/*!
    Clears the contents of the line edit.

    \sa setText(), insert()
*/
void QSecureLineEdit::clear()
{
    Q_D(QSecureLineEdit);
    int priorState = d->undoState;
    resetInputContext();
    d->selstart = 0;
    d->selend = d->text.length();
    d->removeSelectedText();
    d->separate();
    d->finishChange(priorState, /*update*/false, /*edited*/false);
}

/*!
    Undoes the last operation if undo is \link
    QSecureLineEdit::undoAvailable available\endlink. Deselects any current
    selection, and updates the selection start to the current cursor
    position.
*/
void QSecureLineEdit::undo()
{
    Q_D(QSecureLineEdit);
    resetInputContext();
    d->undo();
    d->finishChange(-1, true);
}

/*!
    Redoes the last operation if redo is \link
    QSecureLineEdit::redoAvailable available\endlink.
*/
void QSecureLineEdit::redo()
{
    Q_D(QSecureLineEdit);
    resetInputContext();
    d->redo();
    d->finishChange();
}


/*!
    \property QSecureLineEdit::readOnly
    \brief whether the line edit is read only.

    In read-only mode, the user can still copy the text to the
    clipboard, or drag and drop the text (if echoMode() is \l Normal),
    but cannot edit it.

    QSecureLineEdit does not show a cursor in read-only mode.

    \sa setEnabled()
*/

bool QSecureLineEdit::isReadOnly() const
{
    Q_D(const QSecureLineEdit);
    return d->readOnly;
}

void QSecureLineEdit::setReadOnly(bool enable)
{
    Q_D(QSecureLineEdit);
    if (d->readOnly != enable) {
        d->readOnly = enable;
        setAttribute(Qt::WA_MacShowFocusRect, !d->readOnly);
#ifndef QT_NO_CURSOR
        setCursor(enable ? Qt::ArrowCursor : Qt::IBeamCursor);
#endif
        update();
    }
}


#ifndef QT_NO_CLIPBOARD
/*!
    Copies the selected text to the clipboard and deletes it, if there
    is any, and if echoMode() is \l Normal.

    If the current validator disallows deleting the selected text,
    cut() will copy without deleting.

    \sa copy() paste() setValidator()
*/

void QSecureLineEdit::cut()
{
    if (hasSelectedText()) {
        copy();
        del();
    }
}


/*!
    Copies the selected text to the clipboard, if there is any, and if
    echoMode() is \l Normal.

    \sa cut() paste()
*/

void QSecureLineEdit::copy() const
{
    Q_D(const QSecureLineEdit);
    d->copy();
}

/*!
    Inserts the clipboard's text at the cursor position, deleting any
    selected text, providing the line edit is not \link
    QSecureLineEdit::readOnly read-only\endlink.

    If the end result would not be acceptable to the current
    \link setValidator() validator\endlink, nothing happens.

    \sa copy() cut()
*/

void QSecureLineEdit::paste()
{
    if(echoMode() == PasswordEchoOnEdit)
    {
        Q_D(QSecureLineEdit);
        setEchoMode(Normal);
        clear();
        d->resumePassword = true;
    }
    insert(QApplication::clipboard()->text(QClipboard::Clipboard));
}

void QSecureLineEditPrivate::copy(bool clipboard) const
{
    Q_Q(const QSecureLineEdit);
    QString t = q->selectedText();
    if (!t.isEmpty() && echoMode == QSecureLineEdit::Normal) {
        q->disconnect(QApplication::clipboard(), SIGNAL(selectionChanged()), q, 0);
        QApplication::clipboard()->setText(t, clipboard ? QClipboard::Clipboard : QClipboard::Selection);
        q->connect(QApplication::clipboard(), SIGNAL(selectionChanged()),
                   q, SLOT(_q_clipboardChanged()));
    }
}

#endif // !QT_NO_CLIPBOARD

/*! \reimp
*/
bool QSecureLineEdit::event(QEvent * e)
{
    Q_D(QSecureLineEdit);
    if (e->type() == QEvent::ShortcutOverride && !d->readOnly) {
        QKeyEvent* ke = (QKeyEvent*) e;
        if (ke->modifiers() == Qt::NoModifier || ke->modifiers() == Qt::ShiftModifier
            || ke->modifiers() == Qt::KeypadModifier) {
            if (ke->key() < Qt::Key_Escape) {
                ke->accept();
            } else {
                switch (ke->key()) {
                case Qt::Key_Delete:
                case Qt::Key_Home:
                case Qt::Key_End:
                case Qt::Key_Backspace:
                case Qt::Key_Left:
                case Qt::Key_Right:
                    ke->accept();
                default:
                    break;
                }
            }
        } else if (ke->modifiers() & Qt::ControlModifier) {
            switch (ke->key()) {
// Those are too frequently used for application functionality
/*            case Qt::Key_A:
            case Qt::Key_B:
            case Qt::Key_D:
            case Qt::Key_E:
            case Qt::Key_F:
            case Qt::Key_H:
            case Qt::Key_K:
*/
            case Qt::Key_C:
            case Qt::Key_V:
            case Qt::Key_X:
            case Qt::Key_Y:
            case Qt::Key_Z:
            case Qt::Key_Left:
            case Qt::Key_Right:
#if !defined(Q_WS_MAC)
            case Qt::Key_Insert:
            case Qt::Key_Delete:
#endif
                ke->accept();
            default:
                break;
            }
        }
    } else if (e->type() == QEvent::Timer) {
        // should be timerEvent, is here for binary compatibility
        int timerId = ((QTimerEvent*)e)->timerId();
        if (timerId == d->cursorTimer) {
            QStyleOptionFrameV2 opt;
            initStyleOption(&opt);
            if(!hasSelectedText()
               || style()->styleHint(QStyle::SH_BlinkCursorWhenTextSelected, &opt, this))
                d->setCursorVisible(!d->cursorVisible);
#ifndef QT_NO_DRAGANDDROP
        } else if (timerId == d->dndTimer.timerId()) {
            d->drag();
#endif
        }
        else if (timerId == d->tripleClickTimer.timerId())
            d->tripleClickTimer.stop();
#ifdef QT_KEYPAD_NAVIGATION
        else if (timerId == d->deleteAllTimer.timerId()) {
            d->deleteAllTimer.stop();
            clear();
        }
#endif
    } else if (e->type() == QEvent::ContextMenu) {
#ifndef QT_NO_IM
        if (d->composeMode())
            return true;
#endif
        d->separate();
    } else if (e->type() == QEvent::WindowActivate) {
        QTimer::singleShot(0, this, SLOT(_q_handleWindowActivate()));
    }
#ifdef QT_KEYPAD_NAVIGATION
    if (QApplication::keypadNavigationEnabled()) {
        if ((e->type() == QEvent::KeyPress) || (e->type() == QEvent::KeyRelease)) {
            QKeyEvent *ke = (QKeyEvent *)e;
            if (ke->key() == Qt::Key_Back) {
                if (ke->isAutoRepeat()) {
                    // Swallow it. We don't want back keys running amok.
                    ke->accept();
                    return true;
                }
                if ((e->type() == QEvent::KeyRelease)
                    && !isReadOnly()
                    && d->deleteAllTimer.isActive()) {
                    d->deleteAllTimer.stop();
                    backspace();
                    ke->accept();
                    return true;
                }
            }
        } else if (e->type() == QEvent::EnterEditFocus) {
            end(false);
            if (!d->cursorTimer) {
                int cft = QApplication::cursorFlashTime();
                d->cursorTimer = cft ? startTimer(cft/2) : -1;
            }
        } else if (e->type() == QEvent::LeaveEditFocus) {
            d->setCursorVisible(false);
            if (d->cursorTimer > 0)
                killTimer(d->cursorTimer);
            d->cursorTimer = 0;

            if (!d->emitingEditingFinished) {
                if (hasAcceptableInput() || d->fixup()) {
                    d->emitingEditingFinished = true;
                    emit editingFinished();
                    d->emitingEditingFinished = false;
                }
            }
        }
    }
#endif
    return QWidget::event(e);
}

/*! \reimp
*/
void QSecureLineEdit::mousePressEvent(QMouseEvent* e)
{
    Q_D(QSecureLineEdit);
    if (d->sendMouseEventToInputContext(e))
        return;
    if (e->button() == Qt::RightButton)
        return;
#ifdef QT_KEYPAD_NAVIGATION
    if (QApplication::keypadNavigationEnabled() && !hasEditFocus()) {
        setEditFocus(true);
        // Get the completion list to pop up.
        if (d->completer)
            d->completer->complete();
    }
#endif
    if (d->tripleClickTimer.isActive() && (e->pos() - d->tripleClick).manhattanLength() <
         QApplication::startDragDistance()) {
        selectAll();
        return;
    }
    bool mark = e->modifiers() & Qt::ShiftModifier;
    int cursor = d->xToPos(e->pos().x());
#ifndef QT_NO_DRAGANDDROP
    if (!mark && d->dragEnabled && d->echoMode == Normal &&
         e->button() == Qt::LeftButton && d->inSelection(e->pos().x())) {
        d->cursor = cursor;
        update();
        d->dndPos = e->pos();
        if (!d->dndTimer.isActive())
            d->dndTimer.start(QApplication::startDragTime(), this);
        d->emitCursorPositionChanged();
    } else
#endif
    {
        d->moveCursor(cursor, mark);
    }
}

/*! \reimp
*/
void QSecureLineEdit::mouseMoveEvent(QMouseEvent * e)
{
    Q_D(QSecureLineEdit);
    if (d->sendMouseEventToInputContext(e))
        return;

    if (e->buttons() & Qt::LeftButton) {
#ifndef QT_NO_DRAGANDDROP
        if (d->dndTimer.isActive()) {
            if ((d->dndPos - e->pos()).manhattanLength() > QApplication::startDragDistance())
                d->drag();
        } else
#endif
        {
            d->moveCursor(d->xToPos(e->pos().x()), true);
        }
    }
}

/*! \reimp
*/
void QSecureLineEdit::mouseReleaseEvent(QMouseEvent* e)
{
    Q_D(QSecureLineEdit);
    if (d->sendMouseEventToInputContext(e))
        return;
#ifndef QT_NO_DRAGANDDROP
    if (e->button() == Qt::LeftButton) {
        if (d->dndTimer.isActive()) {
            d->dndTimer.stop();
            deselect();
            return;
        }
    }
#endif
#ifndef QT_NO_CLIPBOARD
    if (QApplication::clipboard()->supportsSelection()) {
        if (e->button() == Qt::LeftButton) {
            d->copy(false);
        } else if (!d->readOnly && e->button() == Qt::MidButton) {
            d->deselect();
            insert(QApplication::clipboard()->text(QClipboard::Selection));
        }
    }
#endif
}

/*! \reimp
*/
void QSecureLineEdit::mouseDoubleClickEvent(QMouseEvent* e)
{
    Q_D(QSecureLineEdit);
    if (d->sendMouseEventToInputContext(e))
        return;
    if (e->button() == Qt::LeftButton) {
        deselect();
        d->cursor = d->xToPos(e->pos().x());
        d->cursor = d->textLayout.previousCursorPosition(d->cursor, QTextLayout::SkipWords);
        // ## text layout should support end of words.
        int end = d->textLayout.nextCursorPosition(d->cursor, QTextLayout::SkipWords);
        while (end > d->cursor && d->text[end-1].isSpace())
            --end;
        d->moveCursor(end, true);
        d->tripleClickTimer.start(QApplication::doubleClickInterval(), this);
        d->tripleClick = e->pos();
    }
}

/*!
    \fn void  QSecureLineEdit::returnPressed()

    This signal is emitted when the Return or Enter key is pressed.
    Note that if there is a validator() or inputMask() set on the line
    edit, the returnPressed() signal will only be emitted if the input
    follows the inputMask() and the validator() returns
    QValidator::Acceptable.
*/

/*!
    \fn void  QSecureLineEdit::editingFinished()

    This signal is emitted when the Return or Enter key is pressed or
    the line edit loses focus. Note that if there is a validator() or
    inputMask() set on the line edit and enter/return is pressed, the
    editingFinished() signal will only be emitted if the input follows
    the inputMask() and the validator() returns QValidator::Acceptable.
*/

/*!
    Converts the given key press \a event into a line edit action.

    If Return or Enter is pressed and the current text is valid (or
    can be \link QValidator::fixup() made valid\endlink by the
    validator), the signal returnPressed() is emitted.

    The default key bindings are listed in the class's detailed
    description.
*/

void QSecureLineEdit::keyPressEvent(QKeyEvent *event)
{
    Q_D(QSecureLineEdit);

#ifndef QT_NO_COMPLETER
    if (d->completer
        && d->completer->popup()
        && d->completer->popup()->isVisible()) {
        // The following keys are forwarded by the completer to the widget
        // Ignoring the events lets the completer provide suitable default behavior
       switch (event->key()) {
       case Qt::Key_Escape:
            event->ignore();
            return;
       case Qt::Key_Enter:
       case Qt::Key_Return:
       case Qt::Key_F4:
#ifdef QT_KEYPAD_NAVIGATION
       case Qt::Key_Select:
           if (!QApplication::keypadNavigationEnabled())
               break;
#endif
           d->completer->popup()->hide(); // just hide. will end up propagating to parent
       default:
           break; // normal key processing
       }
    }
#endif // QT_NO_COMPLETER

#ifdef QT_KEYPAD_NAVIGATION
    bool select = false;
    switch (event->key()) {
        case Qt::Key_Select:
            if (QApplication::keypadNavigationEnabled()) {
                if (hasEditFocus()) {
                    setEditFocus(false);
                    if (d->completer && d->completer->popup()->isVisible())
                        d->completer->popup()->hide();
                    select = true;
                }
            }
            break;
        case Qt::Key_Back:
        case Qt::Key_No:
            if (!QApplication::keypadNavigationEnabled() || !hasEditFocus()) {
                event->ignore();
                return;
            }
            break;
        default:
            if (QApplication::keypadNavigationEnabled()) {
                if (!hasEditFocus() && !(event->modifiers() & Qt::ControlModifier)) {
                    if (!event->text().isEmpty() && event->text().at(0).isPrint()
                        && !isReadOnly())
                    {
                        setEditFocus(true);
                        clear();
                    } else {
                        event->ignore();
                        return;
                    }
                }
            }
    }



    if (QApplication::keypadNavigationEnabled() && !select && !hasEditFocus()) {
        setEditFocus(true);
        if (event->key() == Qt::Key_Select)
            return; // Just start. No action.
    }
#endif


    if(echoMode() == PasswordEchoOnEdit &&
       !isReadOnly() &&
       !event->text().isEmpty() &&
#ifdef QT_KEYPAD_NAVIGATION
       event->key() != Qt::Key_Select &&
       event->key() != Qt::Key_Up &&
       event->key() != Qt::Key_Down &&
       event->key() != Qt::Key_Back &&
#endif
       !(event->modifiers() & Qt::ControlModifier))
    {
        setEchoMode(Normal);
        clear();
        d->resumePassword = true;
    }

    d->setCursorVisible(true);
    if (event->key() == Qt::Key_Enter || event->key() == Qt::Key_Return) {
        if (hasAcceptableInput() || d->fixup()) {
            emit returnPressed();
            d->emitingEditingFinished = true;
            emit editingFinished();
            d->emitingEditingFinished = false;
        }
        event->ignore();
        return;
    }
    bool unknown = false;

    if (false) {
    }
#ifndef QT_NO_SHORTCUT
    else if (event == QKeySequence::Undo) {
        if (!d->readOnly)
            undo();
    }
    else if (event == QKeySequence::Redo) {
        if (!d->readOnly)
            redo();
    }
    else if (event == QKeySequence::SelectAll) {
        selectAll();
    }
#ifndef QT_NO_CLIPBOARD
    else if (event == QKeySequence::Copy) {
        copy();
    }
    else if (event == QKeySequence::Paste) {
        if (!d->readOnly)
            paste();
    }
    else if (event == QKeySequence::Cut) {
        if (!d->readOnly) {
            cut();
        }
    }
    else if (event == QKeySequence::DeleteEndOfLine) {
        if (!d->readOnly) {
            setSelection(d->cursor, d->text.size());
            copy();
            del();
        }
    }
#endif //QT_NO_CLIPBOARD
    else if (event == QKeySequence::MoveToStartOfLine) {
        home(0);
    }
    else if (event == QKeySequence::MoveToEndOfLine) {
        end(0);
    }
    else if (event == QKeySequence::SelectStartOfLine) {
        home(1);
    }
    else if (event == QKeySequence::SelectEndOfLine) {
        end(1);
    }
    else if (event == QKeySequence::MoveToNextChar) {
#if !defined(Q_WS_WIN) || defined(QT_NO_COMPLETER)
        if (d->hasSelectedText()) {
#else
        if (d->hasSelectedText() && d->completer
            && d->completer->completionMode() == QCompleter::InlineCompletion) {
#endif
            d->moveCursor(d->selend, false);
        } else {
            cursorForward(0, layoutDirection() == Qt::LeftToRight ? 1 : -1);
        }
    }
    else if (event == QKeySequence::SelectNextChar) {
        cursorForward(1, layoutDirection() == Qt::LeftToRight ? 1 : -1);
    }
    else if (event == QKeySequence::MoveToPreviousChar) {
#if !defined(Q_WS_WIN) || defined(QT_NO_COMPLETER)
        if (d->hasSelectedText()) {
#else
        if (d->hasSelectedText() && d->completer
            && d->completer->completionMode() == QCompleter::InlineCompletion) {
#endif
            d->moveCursor(d->selstart, false);
        } else {
            cursorBackward(0, layoutDirection() == Qt::LeftToRight ? 1 : -1);
        }
    }
    else if (event == QKeySequence::SelectPreviousChar) {
        cursorBackward(1, layoutDirection() == Qt::LeftToRight ? 1 : -1);
    }
    else if (event == QKeySequence::MoveToNextWord) {
        if (echoMode() == Normal)
            layoutDirection() == Qt::LeftToRight ? cursorWordForward(0) : cursorWordBackward(0);
        else
            layoutDirection() == Qt::LeftToRight ? end(0) : home(0);
    }
    else if (event == QKeySequence::MoveToPreviousWord) {
        if (echoMode() == Normal)
            layoutDirection() == Qt::LeftToRight ? cursorWordBackward(0) : cursorWordForward(0);
        else if (!d->readOnly) {
            layoutDirection() == Qt::LeftToRight ? home(0) : end(0);
        }
    }
    else if (event == QKeySequence::SelectNextWord) {
        if (echoMode() == Normal)
            layoutDirection() == Qt::LeftToRight ? cursorWordForward(1) : cursorWordBackward(1);
        else
            layoutDirection() == Qt::LeftToRight ? end(1) : home(1);
    }
    else if (event == QKeySequence::SelectPreviousWord) {
        if (echoMode() == Normal)
            layoutDirection() == Qt::LeftToRight ? cursorWordBackward(1) : cursorWordForward(1);
        else
            layoutDirection() == Qt::LeftToRight ? home(1) : end(1);
    }
    else if (event == QKeySequence::Delete) {
        if (!d->readOnly)
            del();
    }
    else if (event == QKeySequence::DeleteEndOfWord) {
        if (!d->readOnly) {
            cursorWordForward(true);
            del();
        }
    }
    else if (event == QKeySequence::DeleteStartOfWord) {
        if (!d->readOnly) {
            cursorWordBackward(true);
            del();
        }
    }
#endif // QT_NO_SHORTCUT
    else {
#ifdef Q_WS_MAC
        if (event->key() == Qt::Key_Up || event->key() == Qt::Key_Down) {
            Qt::KeyboardModifiers myModifiers = (event->modifiers() & ~Qt::KeypadModifier);
            if (myModifiers & Qt::ShiftModifier) {
                if (myModifiers == (Qt::ControlModifier|Qt::ShiftModifier)
                        || myModifiers == (Qt::AltModifier|Qt::ShiftModifier)
                        || myModifiers == Qt::ShiftModifier) {

                    event->key() == Qt::Key_Up ? home(1) : end(1);
                }
            } else {
                if ((myModifiers == Qt::ControlModifier
                     || myModifiers == Qt::AltModifier
                     || myModifiers == Qt::NoModifier)) {
                    event->key() == Qt::Key_Up ? home(0) : end(0);
                }
            }
        }
#endif
        if (event->modifiers() & Qt::ControlModifier) {
            switch (event->key()) {
            case Qt::Key_Backspace:
                if (!d->readOnly) {
                    cursorWordBackward(true);
                    del();
                }
                break;
#ifndef QT_NO_COMPLETER
            case Qt::Key_Up:
            case Qt::Key_Down:
                d->complete(event->key());
                break;
#endif
#if defined(Q_WS_X11)
            case Qt::Key_E:
                end(0);
                break;

            case Qt::Key_U:
                if (!d->readOnly) {
                    setSelection(0, d->text.size());
#ifndef QT_NO_CLIPBOARD
                    copy();
#endif
                    del();
                }
            break;
#endif
            default:
                unknown = true;
            }
        } else { // ### check for *no* modifier
            switch (event->key()) {
            case Qt::Key_Backspace:
                if (!d->readOnly) {
                    backspace();
#ifndef QT_NO_COMPLETER
                    d->complete(Qt::Key_Backspace);
#endif
                }
                break;
#ifdef QT_KEYPAD_NAVIGATION
            case Qt::Key_Back:
                if (QApplication::keypadNavigationEnabled() && !event->isAutoRepeat()
                    && !isReadOnly()) {
                    if (text().length() == 0) {
                        setText(d->origText);

                        if (d->resumePassword)
                        {
                            setEchoMode(PasswordEchoOnEdit);
                            d->resumePassword = false;
                        }

                        setEditFocus(false);
                    } else if (!d->deleteAllTimer.isActive()) {
                        d->deleteAllTimer.start(750, this);
                    }
                } else {
                    unknown = true;
                }
                break;
#endif

            default:
                unknown = true;
            }
        }
    }

    if (event->key() == Qt::Key_Direction_L || event->key() == Qt::Key_Direction_R) {
        setLayoutDirection((event->key() == Qt::Key_Direction_L) ? Qt::LeftToRight : Qt::RightToLeft);
        d->updateTextLayout();
        update();
        unknown = false;
    }

    if (unknown && !d->readOnly) {
        QString t = event->text();
        if (!t.isEmpty() && t.at(0).isPrint()) {
            insert( secqstring( t.begin(), t.end() ) );
            // PENDING(marc) wipe 't' here?
            // wipe( const_cast<QChar*>( t.constData() ), t.length() );
#ifndef QT_NO_COMPLETER
            d->complete(event->key());
#endif
            event->accept();
            return;
        }
    }

    if (unknown)
        event->ignore();
    else
        event->accept();
}

/*!
  \since 4.4

  Returns a rectangle that includes the lineedit cursor.
*/
QRect QSecureLineEdit::cursorRect() const
{
    Q_D(const QSecureLineEdit);
    return d->cursorRect();
}

/*!
  This function is not intended as polymorphic usage. Just a shared code
  fragment that calls QInputContext::mouseHandler for this
  class.
*/
bool QSecureLineEditPrivate::sendMouseEventToInputContext( QMouseEvent *e )
{
#if !defined QT_NO_IM
    Q_Q(QSecureLineEdit);
    if ( composeMode() ) {
        int tmp_cursor = xToPos(e->pos().x());
        int mousePos = tmp_cursor - cursor;
        if ( mousePos < 0 || mousePos > textLayout.preeditAreaText().length() ) {
            mousePos = -1;
            // don't send move events outside the preedit area
            if ( e->type() == QEvent::MouseMove )
                return true;
        }

        QInputContext *qic = q->inputContext();
        if ( qic )
            // may be causing reset() in some input methods
            qic->mouseHandler(mousePos, e);
        if (!textLayout.preeditAreaText().isEmpty())
            return true;
    }
#else
    Q_UNUSED(e);
#endif

    return false;
}

/*! \reimp
 */
void QSecureLineEdit::inputMethodEvent(QInputMethodEvent *e)
{
    Q_D(QSecureLineEdit);
    if (d->readOnly) {
        e->ignore();
        return;
    }


    if(echoMode() == PasswordEchoOnEdit)
    {
        setEchoMode(Normal);
        clear();
        d->resumePassword = true;
    }


#ifdef QT_KEYPAD_NAVIGATION
    // Focus in if currently in navigation focus on the widget
    // Only focus in on preedits, to allow input methods to
    // commit text as they focus out without interfering with focus
    if (QApplication::keypadNavigationEnabled() &&
            hasFocus() && !hasEditFocus()
            && !e->preeditString().isEmpty()) {
        setEditFocus(true);
        selectAll();        // so text is replaced rather than appended to
    }
#endif

    int priorState = d->undoState;
    d->removeSelectedText();

    int c = d->cursor; // cursor position after insertion of commit string
    if (e->replacementStart() <= 0)
        c += e->commitString().length() + qMin(-e->replacementStart(), e->replacementLength());

    d->cursor += e->replacementStart();

    // insert commit string
    if (e->replacementLength()) {
        d->selstart = d->cursor;
        d->selend = d->selstart + e->replacementLength();
        d->removeSelectedText();
    }
    const QString commitString = e->commitString();
    if (!commitString.isEmpty())
        d->insert(secqstring(commitString.begin(), commitString.end()));

    d->cursor = c;

    d->textLayout.setPreeditArea(d->cursor, e->preeditString());
    d->preeditCursor = e->preeditString().length();
    d->hideCursor = false;
    QList<QTextLayout::FormatRange> formats;
    for (int i = 0; i < e->attributes().size(); ++i) {
        const QInputMethodEvent::Attribute &a = e->attributes().at(i);
        if (a.type == QInputMethodEvent::Cursor) {
            d->preeditCursor = a.start;
            d->hideCursor = !a.length;
        } else if (a.type == QInputMethodEvent::TextFormat) {
            QTextCharFormat f = qvariant_cast<QTextFormat>(a.value).toCharFormat();
            if (f.isValid()) {
                QTextLayout::FormatRange o;
                o.start = a.start + d->cursor;
                o.length = a.length;
                o.format = f;
                formats.append(o);
            }
        }
    }
    d->textLayout.setAdditionalFormats(formats);
    d->updateTextLayout();
    update();
    if (!e->commitString().isEmpty())
        d->emitCursorPositionChanged();
    d->finishChange(priorState);
#ifndef QT_NO_COMPLETER
    if (!e->commitString().isEmpty())
        d->complete(Qt::Key_unknown);
#endif
}

/*!\reimp
*/
QVariant QSecureLineEdit::inputMethodQuery(Qt::InputMethodQuery property) const
{
    Q_D(const QSecureLineEdit);
    switch(property) {
    case Qt::ImMicroFocus:
        return d->cursorRect();
    case Qt::ImFont:
        return font();
    case Qt::ImCursorPosition:
        return QVariant(d->cursor);
#ifdef TEMPORARILY_REMOVED // PENDING(marc) insecure
    case Qt::ImSurroundingText:
        return QVariant(d->text);
    case Qt::ImCurrentSelection:
        return QVariant(selectedText());
#endif
    default:
        return QVariant();
    }
}

/*!\reimp
*/

void QSecureLineEdit::focusInEvent(QFocusEvent *e)
{
    Q_D(QSecureLineEdit);
    if (e->reason() == Qt::TabFocusReason ||
         e->reason() == Qt::BacktabFocusReason  ||
         e->reason() == Qt::ShortcutFocusReason) {
        if (d->maskData)
            d->moveCursor(d->nextMaskBlank(0));
        else if (!d->hasSelectedText())
            selectAll();
    }
#ifdef QT_KEYPAD_NAVIGATION
    if (!QApplication::keypadNavigationEnabled() || (hasEditFocus() && e->reason() == Qt::PopupFocusReason))
#endif
    if (!d->cursorTimer) {
        int cft = QApplication::cursorFlashTime();
        d->cursorTimer = cft ? startTimer(cft/2) : -1;
    }
    QStyleOptionFrameV2 opt;
    initStyleOption(&opt);
    if((!hasSelectedText() && d->textLayout.preeditAreaText().isEmpty())
       || style()->styleHint(QStyle::SH_BlinkCursorWhenTextSelected, &opt, this))
        d->setCursorVisible(true);
#ifdef Q_WS_MAC
    if (d->echoMode == Password || d->echoMode == NoEcho)
        qt_mac_secure_keyboard(true);
#endif
#ifdef QT_KEYPAD_NAVIGATION
    d->origText = d->text;
#endif
#ifndef QT_NO_COMPLETER
    if (d->completer) {
        d->completer->setWidget(this);
        QObject::connect(d->completer, SIGNAL(activated(QString)),
                         this, SLOT(setText(QString)));
        QObject::connect(d->completer, SIGNAL(highlighted(QString)),
                         this, SLOT(_q_completionHighlighted(QString)));
    }
#endif
    update();
}

/*!\reimp
*/

void QSecureLineEdit::focusOutEvent(QFocusEvent *e)
{
    Q_D(QSecureLineEdit);


    if(d->resumePassword){
        setEchoMode(PasswordEchoOnEdit);
        d->resumePassword = false;
    }


    Qt::FocusReason reason = e->reason();
    if (reason != Qt::ActiveWindowFocusReason &&
        reason != Qt::PopupFocusReason)
        deselect();

    d->setCursorVisible(false);
    if (d->cursorTimer > 0)
        killTimer(d->cursorTimer);
    d->cursorTimer = 0;

#ifdef QT_KEYPAD_NAVIGATION
    // editingFinished() is already emitted on LeaveEditFocus
    if (!QApplication::keypadNavigationEnabled())
#endif
    if (reason != Qt::PopupFocusReason
        || !(QApplication::activePopupWidget() && QApplication::activePopupWidget()->parentWidget() == this)) {
        if (!d->emitingEditingFinished) {
            if (hasAcceptableInput() || d->fixup()) {
                d->emitingEditingFinished = true;
                emit editingFinished();
                d->emitingEditingFinished = false;
            }
        }
#ifdef QT3_SUPPORT
        emit lostFocus();
#endif
    }
#ifdef Q_WS_MAC
    if (d->echoMode == Password || d->echoMode == NoEcho)
        qt_mac_secure_keyboard(false);
#endif
#ifdef QT_KEYPAD_NAVIGATION
    d->origText = QString();
#endif
#ifndef QT_NO_COMPLETER
    if (d->completer) {
        QObject::disconnect(d->completer, 0, this, 0);
    }
#endif
    update();
}

/*!\reimp
*/
void QSecureLineEdit::paintEvent(QPaintEvent *)
{
    Q_D(QSecureLineEdit);
    QPainter p(this);

    QRect r = rect();
    QPalette pal = palette();

    QStyleOptionFrameV2 panel;
    initStyleOption(&panel);
    style()->drawPrimitive(QStyle::PE_PanelLineEdit, &panel, &p, this);
    r = style()->subElementRect(QStyle::SE_LineEditContents, &panel, this);
    p.setClipRect(r);

    QFontMetrics fm = fontMetrics();
    Qt::Alignment va = QStyle::visualAlignment(layoutDirection(), QFlag(d->alignment));
    switch (va & Qt::AlignVertical_Mask) {
     case Qt::AlignBottom:
         d->vscroll = r.y() + r.height() - fm.height() - verticalMargin;
         break;
     case Qt::AlignTop:
         d->vscroll = r.y() + verticalMargin;
         break;
     default:
         //center
         d->vscroll = r.y() + (r.height() - fm.height() + 1) / 2;
         break;
    }
    QRect lineRect(r.x() + horizontalMargin, d->vscroll, r.width() - 2*horizontalMargin, fm.height());
    QTextLine line = d->textLayout.lineAt(0);

    int cursor = d->cursor;
    if (d->preeditCursor != -1)
        cursor += d->preeditCursor;
    // locate cursor position
    int cix = qRound(line.cursorToX(cursor));

    // horizontal scrolling
    int minLB = qMax(0, -fm.minLeftBearing());
    int minRB = qMax(0, -fm.minRightBearing());


    int widthUsed = qRound(line.naturalTextWidth()) + 1 + minRB;
    if ((minLB + widthUsed) <=  lineRect.width()) {
        switch (va & ~(Qt::AlignAbsolute|Qt::AlignVertical_Mask)) {
        case Qt::AlignRight:
            d->hscroll = widthUsed - lineRect.width() + 1;
            break;
        case Qt::AlignHCenter:
            d->hscroll = (widthUsed - lineRect.width()) / 2;
            break;
        default:
            // Left
            d->hscroll = 0;
            break;
        }
        d->hscroll -= minLB;
    } else if (cix - d->hscroll >= lineRect.width()) {
        d->hscroll = cix - lineRect.width() + 1;
    } else if (cix - d->hscroll < 0) {
        d->hscroll = cix;
    } else if (widthUsed - d->hscroll < lineRect.width()) {
        d->hscroll = widthUsed - lineRect.width() + 1;
    }
    // the y offset is there to keep the baseline constant in case we have script changes in the text.
    QPoint topLeft = lineRect.topLeft() - QPoint(d->hscroll, d->ascent - fm.ascent());

    // draw text, selections and cursors
#ifndef QT_NO_STYLE_STYLESHEET
    if (QStyleSheetStyle* cssStyle = qobject_cast<QStyleSheetStyle*>(style())) {
        cssStyle->focusPalette(this, &panel, &pal);
    }
#endif
    p.setPen(pal.text().color());

    QVector<QTextLayout::FormatRange> selections;
#ifdef QT_KEYPAD_NAVIGATION
    if (!QApplication::keypadNavigationEnabled() || hasEditFocus())
#endif
    if (d->selstart < d->selend || (d->cursorVisible && d->maskData && !d->readOnly)) {
        QTextLayout::FormatRange o;
        if (d->selstart < d->selend) {
            o.start = d->selstart;
            o.length = d->selend - d->selstart;
            o.format.setBackground(pal.brush(QPalette::Highlight));
            o.format.setForeground(pal.brush(QPalette::HighlightedText));
        } else {
            // mask selection
            o.start = d->cursor;
            o.length = 1;
            o.format.setBackground(pal.brush(QPalette::Text));
            o.format.setForeground(pal.brush(QPalette::Window));
        }
        selections.append(o);
    }

    // Asian users see an IM selection text as cursor on candidate
    // selection phase of input method, so the ordinary cursor should be
    // invisible if we have a preedit string.
    d->textLayout.draw(&p, topLeft, selections, r);
    if (d->cursorVisible && !d->readOnly && !d->hideCursor)
        d->textLayout.drawCursor(&p, topLeft, cursor, style()->pixelMetric(QStyle::PM_TextCursorWidth));
}


#ifndef QT_NO_DRAGANDDROP
/*!\reimp
*/
void QSecureLineEdit::dragMoveEvent(QDragMoveEvent *e)
{
    Q_D(QSecureLineEdit);
    if (!d->readOnly && e->mimeData()->hasFormat(QLatin1String("text/plain"))) {
        e->acceptProposedAction();
        d->cursor = d->xToPos(e->pos().x());
        d->cursorVisible = true;
        update();
        d->emitCursorPositionChanged();
    }
}

/*!\reimp */
void QSecureLineEdit::dragEnterEvent(QDragEnterEvent * e)
{
    QSecureLineEdit::dragMoveEvent(e);
}

/*!\reimp */
void QSecureLineEdit::dragLeaveEvent(QDragLeaveEvent *)
{
    Q_D(QSecureLineEdit);
    if (d->cursorVisible) {
        d->cursorVisible = false;
        update();
    }
}

/*!\reimp */
void QSecureLineEdit::dropEvent(QDropEvent* e)
{
    Q_D(QSecureLineEdit);
    QString str = e->mimeData()->text();

    if (!str.isNull() && !d->readOnly) {
        if (e->source() == this && e->dropAction() == Qt::CopyAction)
            deselect();
        d->cursor =d->xToPos(e->pos().x());
        int selStart = d->cursor;
        int oldSelStart = d->selstart;
        int oldSelEnd = d->selend;
        d->cursorVisible = false;
        e->acceptProposedAction();
        insert(str);
        if (e->source() == this) {
            if (e->dropAction() == Qt::MoveAction) {
                if (selStart > oldSelStart && selStart <= oldSelEnd)
                    setSelection(oldSelStart, str.length());
                else if (selStart > oldSelEnd)
                    setSelection(selStart - str.length(), str.length());
                else
                    setSelection(selStart, str.length());
            } else {
                setSelection(selStart, str.length());
            }
        }
    } else {
        e->ignore();
        update();
    }
}

void QSecureLineEditPrivate::drag()
{
    Q_Q(QSecureLineEdit);
    dndTimer.stop();
    QMimeData *data = new QMimeData;
    data->setText(q->selectedText());
    QDrag *drag = new QDrag(q);
    drag->setMimeData(data);
    Qt::DropAction action = drag->start();
    if (action == Qt::MoveAction && !readOnly && drag->target() != q) {
        int priorState = undoState;
        removeSelectedText();
        finishChange(priorState);
    }
}

#endif // QT_NO_DRAGANDDROP

#ifndef QT_NO_CONTEXTMENU
/*!
    Shows the standard context menu created with
    createStandardContextMenu().

    If you do not want the line edit to have a context menu, you can set
    its \l contextMenuPolicy to Qt::NoContextMenu. If you want to
    customize the context menu, reimplement this function. If you want
    to extend the standard context menu, reimplement this function, call
    createStandardContextMenu() and extend the menu returned.

    \snippet doc/src/snippets/code/src.gui.widgets.qsecurelineedit.cpp 0

    The \a event parameter is used to obtain the position where
    the mouse cursor was when the event was generated.

    \sa setContextMenuPolicy()
*/
void QSecureLineEdit::contextMenuEvent(QContextMenuEvent *event)
{
    QPointer<QMenu> menu = createStandardContextMenu();
    menu->exec(event->globalPos());
    delete menu;
}

#if defined(Q_WS_WIN)
    extern bool qt_use_rtl_extensions;
#endif

/*!  This function creates the standard context menu which is shown
        when the user clicks on the line edit with the right mouse
        button. It is called from the default contextMenuEvent() handler.
        The popup menu's ownership is transferred to the caller.
*/

QMenu *QSecureLineEdit::createStandardContextMenu()
{
    Q_D(QSecureLineEdit);
    if (!d->actions[QSecureLineEditPrivate::UndoAct]) {
        d->actions[QSecureLineEditPrivate::UndoAct] = new QAction(QSecureLineEdit::tr("&Undo") + ACCEL_KEY(QKeySequence::Undo), this);
        QObject::connect(d->actions[QSecureLineEditPrivate::UndoAct], SIGNAL(triggered()), this, SLOT(undo()));
        d->actions[QSecureLineEditPrivate::RedoAct] = new QAction(QSecureLineEdit::tr("&Redo") + ACCEL_KEY(QKeySequence::Redo), this);
        QObject::connect(d->actions[QSecureLineEditPrivate::RedoAct], SIGNAL(triggered()), this, SLOT(redo()));
        //popup->insertSeparator();
#ifndef QT_NO_CLIPBOARD
        d->actions[QSecureLineEditPrivate::CutAct] = new QAction(QSecureLineEdit::tr("Cu&t") + ACCEL_KEY(QKeySequence::Cut), this);
        QObject::connect(d->actions[QSecureLineEditPrivate::CutAct], SIGNAL(triggered()), this, SLOT(cut()));
        d->actions[QSecureLineEditPrivate::CopyAct] = new QAction(QSecureLineEdit::tr("&Copy") + ACCEL_KEY(QKeySequence::Copy), this);
        QObject::connect(d->actions[QSecureLineEditPrivate::CopyAct], SIGNAL(triggered()), this, SLOT(copy()));
        d->actions[QSecureLineEditPrivate::PasteAct] = new QAction(QSecureLineEdit::tr("&Paste") + ACCEL_KEY(QKeySequence::Paste), this);
        QObject::connect(d->actions[QSecureLineEditPrivate::PasteAct], SIGNAL(triggered()), this, SLOT(paste()));
#endif
        d->actions[QSecureLineEditPrivate::ClearAct] = new QAction(QSecureLineEdit::tr("Delete"), this);
        QObject::connect(d->actions[QSecureLineEditPrivate::ClearAct], SIGNAL(triggered()), this, SLOT(_q_deleteSelected()));
        //popup->insertSeparator();
        d->actions[QSecureLineEditPrivate::SelectAllAct] = new QAction(QSecureLineEdit::tr("Select All")
                                                                 + ACCEL_KEY(QKeySequence::SelectAll)
                                                                 , this);
        QObject::connect(d->actions[QSecureLineEditPrivate::SelectAllAct], SIGNAL(triggered()), this, SLOT(selectAll()));
    }
    d->actions[QSecureLineEditPrivate::UndoAct]->setEnabled(d->isUndoAvailable());
    d->actions[QSecureLineEditPrivate::RedoAct]->setEnabled(d->isRedoAvailable());
#ifndef QT_NO_CLIPBOARD
    d->actions[QSecureLineEditPrivate::CutAct]->setEnabled(!d->readOnly && d->hasSelectedText());
    d->actions[QSecureLineEditPrivate::CopyAct]->setEnabled(d->hasSelectedText());
    d->actions[QSecureLineEditPrivate::PasteAct]->setEnabled(!d->readOnly && !QApplication::clipboard()->text().isEmpty());
#else
    d->actions[QSecureLineEditPrivate::CutAct]->setEnabled(false);
    d->actions[QSecureLineEditPrivate::CopyAct]->setEnabled(false);
    d->actions[QSecureLineEditPrivate::PasteAct]->setEnabled(false);
#endif
    d->actions[QSecureLineEditPrivate::ClearAct]->setEnabled(!d->readOnly && !d->text.isEmpty() && d->hasSelectedText());
    d->actions[QSecureLineEditPrivate::SelectAllAct]->setEnabled(!d->text.isEmpty() && !d->allSelected());

    QMenu *popup = new QMenu(this);
    popup->setObjectName(QLatin1String("qt_edit_menu"));
    popup->addAction(d->actions[QSecureLineEditPrivate::UndoAct]);
    popup->addAction(d->actions[QSecureLineEditPrivate::RedoAct]);
    popup->addSeparator();
    popup->addAction(d->actions[QSecureLineEditPrivate::CutAct]);
    popup->addAction(d->actions[QSecureLineEditPrivate::CopyAct]);
    popup->addAction(d->actions[QSecureLineEditPrivate::PasteAct]);
    popup->addAction(d->actions[QSecureLineEditPrivate::ClearAct]);
    popup->addSeparator();
    popup->addAction(d->actions[QSecureLineEditPrivate::SelectAllAct]);
#if !defined(QT_NO_IM)
    QInputContext *qic = inputContext();
    if (qic) {
        QList<QAction *> imActions = qic->actions();
        for (int i = 0; i < imActions.size(); ++i)
            popup->addAction(imActions.at(i));
    }
#endif

#if defined(Q_WS_WIN)
    if (!d->readOnly && qt_use_rtl_extensions) {
#else
    if (!d->readOnly) {
#endif
        popup->addSeparator();
        QUnicodeControlCharacterMenu *ctrlCharacterMenu = new QUnicodeControlCharacterMenu(this, popup);
        popup->addMenu(ctrlCharacterMenu);
    }
    return popup;
}
#endif // QT_NO_CONTEXTMENU

/*! \reimp */
void QSecureLineEdit::changeEvent(QEvent *ev)
{
    Q_D(QSecureLineEdit);
    if(ev->type() == QEvent::ActivationChange) {
        if (!palette().isEqual(QPalette::Active, QPalette::Inactive))
            update();
    } else if (ev->type() == QEvent::FontChange || ev->type() == QEvent::StyleChange) {
        d->updateTextLayout();
    }
    QWidget::changeEvent(ev);
}

void QSecureLineEditPrivate::_q_clipboardChanged()
{
}

void QSecureLineEditPrivate::_q_handleWindowActivate()
{
    Q_Q(QSecureLineEdit);
    if (!q->hasFocus() && q->hasSelectedText())
        q->deselect();
}

void QSecureLineEditPrivate::_q_deleteSelected()
{
    Q_Q(QSecureLineEdit);
    if (!hasSelectedText())
        return;

    int priorState = undoState;
    q->resetInputContext();
    removeSelectedText();
    separate();
    finishChange(priorState);
}
void QSecureLineEditPrivate::init(const secqstring& txt)
{
    Q_Q(QSecureLineEdit);
#ifndef QT_NO_CURSOR
    q->setCursor(Qt::IBeamCursor);
#endif
    q->setFocusPolicy(Qt::StrongFocus);
    q->setAttribute(Qt::WA_InputMethodEnabled);
    //   Specifies that this widget can use more, but is able to survive on
    //   less, horizontal space; and is fixed vertically.
    q->setSizePolicy(QSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed, QSizePolicy::LineEdit));
    q->setBackgroundRole(QPalette::Base);
    q->setAttribute(Qt::WA_KeyCompression);
    q->setMouseTracking(true);
    q->setAcceptDrops(true);
    text = txt;
    updateTextLayout();
    cursor = text.size();

    q->setAttribute(Qt::WA_MacShowFocusRect);
}

void QSecureLineEditPrivate::updateTextLayout()
{
    // replace certain non-printable characters with spaces (to avoid
    // drawing boxes when using fonts that don't have glyphs for such
    // characters)
    Q_Q(QSecureLineEdit);
    secqstring str = q->displayText();
    QChar* uc = str.empty() ? 0 : &str[0] ;
    for (int i = 0; i < (int)str.size(); ++i) {
        if ((uc[i] < 0x20 && uc[i] != 0x09)
            || uc[i] == QChar::LineSeparator
            || uc[i] == QChar::ParagraphSeparator
            || uc[i] == QChar::ObjectReplacementCharacter)
            uc[i] = QChar(0x0020);
    }
    textLayout.setFont(q->font());
    // PENDING(marc) insecure (only when not in password mode)
    textLayout.setText( QString( str.data(), str.size() ) );
    QTextOption option;
    option.setTextDirection(q->layoutDirection());
    option.setFlags(QTextOption::IncludeTrailingSpaces);
    textLayout.setTextOption(option);

    textLayout.beginLayout();
    QTextLine l = textLayout.createLine();
    textLayout.endLayout();
    ascent = qRound(l.ascent());
}

int QSecureLineEditPrivate::xToPos(int x, QTextLine::CursorPosition betweenOrOn) const
{
    QRect cr = adjustedContentsRect();
    x-= cr.x() - hscroll + horizontalMargin;
    QTextLine l = textLayout.lineAt(0);
    return l.xToCursor(x, betweenOrOn);
}

QRect QSecureLineEditPrivate::cursorRect() const
{
    Q_Q(const QSecureLineEdit);
    QRect cr = adjustedContentsRect();
    int cix = cr.x() - hscroll + horizontalMargin;
    QTextLine l = textLayout.lineAt(0);
    int c = cursor;
    if (preeditCursor != -1)
        c += preeditCursor;
    cix += qRound(l.cursorToX(c));
    int ch = qMin(cr.height(), q->fontMetrics().height() + 1);
    int w = q->style()->pixelMetric(QStyle::PM_TextCursorWidth);
    return QRect(cix-5, vscroll, w + 9, ch);
}

QRect QSecureLineEditPrivate::adjustedContentsRect() const
{
    Q_Q(const QSecureLineEdit);
    QStyleOptionFrameV2 opt;
    q->initStyleOption(&opt);
    return q->style()->subElementRect(QStyle::SE_LineEditContents, &opt, q);
}

bool QSecureLineEditPrivate::fixup() // this function assumes that validate currently returns != Acceptable
{
#ifndef QT_NO_VALIDATOR
    if (validator) {
        QString textCopy = text;
        int cursorCopy = cursor;
        validator->fixup(textCopy);
        if (validator->validate(textCopy, cursorCopy) == QValidator::Acceptable) {
            if (textCopy != text || cursorCopy != cursor)
                setText(textCopy, cursorCopy);
            return true;
        }
    }
#endif
    return false;
}


void QSecureLineEditPrivate::moveCursor(int pos, bool mark)
{
    Q_Q(QSecureLineEdit);
    if (pos != cursor) {
        separate();
        if (maskData)
            pos = pos > cursor ? nextMaskBlank(pos) : prevMaskBlank(pos);
    }
    bool fullUpdate = mark || hasSelectedText();
    if (mark) {
        int anchor;
        if (selend > selstart && cursor == selstart)
            anchor = selend;
        else if (selend > selstart && cursor == selend)
            anchor = selstart;
        else
            anchor = cursor;
        selstart = qMin(anchor, pos);
        selend = qMax(anchor, pos);
        updateTextLayout();
    } else {
        deselect();
    }
    if (fullUpdate) {
        cursor = pos;
        q->update();
    } else {
        setCursorVisible(false);
        cursor = pos;
        setCursorVisible(true);
        if (!adjustedContentsRect().contains(cursorRect()))
            q->update();
    }
    QStyleOptionFrameV2 opt;
    q->initStyleOption(&opt);
    if (mark && !q->style()->styleHint(QStyle::SH_BlinkCursorWhenTextSelected, &opt, q))
        setCursorVisible(false);
    if (mark || selDirty) {
        selDirty = false;
        emit q->selectionChanged();
    }
    emitCursorPositionChanged();
}

void QSecureLineEditPrivate::finishChange(int validateFromState, bool update, bool edited)
{
    Q_Q(QSecureLineEdit);
    bool lineDirty = selDirty;
    if (textDirty) {
        // do validation
        bool wasValidInput = validInput;
        validInput = true;
#ifndef QT_NO_VALIDATOR
        if (validator) {
            validInput = false;
            QString textCopy = text;
            int cursorCopy = cursor;
            validInput = (validator->validate(textCopy, cursorCopy) != QValidator::Invalid);
            if (validInput) {
                if (text != textCopy) {
                    setText(textCopy, cursorCopy);
                    return;
                }
                cursor = cursorCopy;
            }
        }
#endif
        if (validateFromState >= 0 && wasValidInput && !validInput) {
            undo(validateFromState);
            history.resize(undoState);
            if (modifiedState > undoState)
                modifiedState = -1;
            validInput = true;
            textDirty = false;
        }
        updateTextLayout();
        lineDirty |= textDirty;
        if (textDirty) {
            textDirty = false;
            secqstring actualText = maskData ? stripString(text) : text;
            if (edited)
                emit q->textEdited(actualText);
            q->updateMicroFocus();
            emit q->textChanged(actualText);
#ifndef QT_NO_COMPLETER
            if (edited && completer && completer->completionMode() != QCompleter::InlineCompletion)
                complete(-1); // update the popup on cut/paste/del
#endif
        }
#ifndef QT_NO_ACCESSIBILITY
        QAccessible::updateAccessibility(q, 0, QAccessible::ValueChanged);
#endif
    }
    if (selDirty) {
        selDirty = false;
        emit q->selectionChanged();
    }
    if (lineDirty || update)
        q->update();
    emitCursorPositionChanged();
}

void QSecureLineEditPrivate::emitCursorPositionChanged()
{
    Q_Q(QSecureLineEdit);
    if (cursor != lastCursorPos) {
        const int oldLast = lastCursorPos;
        lastCursorPos = cursor;
        emit q->cursorPositionChanged(oldLast, cursor);
    }
}

void QSecureLineEditPrivate::setText(const secqstring& txt, int pos, bool edited)
{
    Q_Q(QSecureLineEdit);
    q->resetInputContext();
    deselect();
    secqstring oldText = text;
    if (maskData) {
        text = maskString(0, txt, true);
        text += clearString(text.size(), maxLength - text.size());
    } else {
        text = txt.empty() ? txt : txt.substr(0, maxLength);
    }
    history.clear();
    modifiedState =  undoState = 0;
    cursor = (pos < 0 || pos > text.size()) ? text.size() : pos;
    textDirty = (oldText != text);
    finishChange(-1, true, edited);
}


void QSecureLineEditPrivate::setCursorVisible(bool visible)
{
    Q_Q(QSecureLineEdit);
    if ((bool)cursorVisible == visible)
        return;
    if (cursorTimer)
        cursorVisible = visible;
    QRect r = cursorRect();
    if (maskData)
        q->update();
    else
        q->update(r);
}

void QSecureLineEditPrivate::addCommand(const Command& cmd)
{
    if (separator && undoState && history[undoState-1].type != Separator) {
        history.resize(undoState + 2);
        history[undoState++] = Command(Separator, cursor, 0, selstart, selend);
    } else {
        history.resize(undoState + 1);
    }
    separator = false;
    history[undoState++] = cmd;
}

void QSecureLineEditPrivate::insert(const secqstring& s)
{
    if (hasSelectedText())
        addCommand(Command(SetSelection, cursor, 0, selstart, selend));
    if (maskData) {
        secqstring ms = maskString(cursor, s);
        for (int i = 0; i < (int) ms.length(); ++i) {
            addCommand (Command(DeleteSelection, cursor+i, text.at(cursor+i), -1, -1));
            addCommand(Command(Insert, cursor+i, ms.at(i), -1, -1));
        }
        text.replace(cursor, ms.length(), secqstring( ms.begin(), ms.end() ) );
        cursor += ms.length();
        cursor = nextMaskBlank(cursor);
    } else {
        int remaining = maxLength - text.size();
        text.insert(cursor, s.substr(0,remaining));
        for (int i = 0; i < (int) s.substr(0,remaining).size(); ++i)
            addCommand(Command(Insert, cursor++, s[i], -1, -1));
    }
    textDirty = true;
}

void QSecureLineEditPrivate::del(bool wasBackspace)
{
    if (cursor < (int) text.size()) {
        if (hasSelectedText())
            addCommand(Command(SetSelection, cursor, 0, selstart, selend));
        addCommand (Command((CommandType)((maskData?2:0)+(wasBackspace?Remove:Delete)), cursor, text[cursor], -1, -1));
        if (maskData) {
            text.replace(cursor, 1, clearString(cursor, 1));
            addCommand(Command(Insert, cursor, text[cursor], -1, -1));
        } else {
            text.erase(cursor, 1);
        }
        textDirty = true;
    }
}

void QSecureLineEditPrivate::removeSelectedText()
{
    if (selstart < selend && selend <= (int) text.size()) {
        separate();
        int i ;
        addCommand(Command(SetSelection, cursor, 0, selstart, selend));
        if (selstart <= cursor && cursor < selend) {
            // cursor is within the selection. Split up the commands
            // to be able to restore the correct cursor position
            for (i = cursor; i >= selstart; --i)
                addCommand (Command(DeleteSelection, i, text[i], -1, 1));
            for (i = selend - 1; i > cursor; --i)
                addCommand (Command(DeleteSelection, i - cursor + selstart - 1, text[i], -1, -1));
        } else {
            for (i = selend-1; i >= selstart; --i)
                addCommand (Command(RemoveSelection, i, text[i], -1, -1));
        }
        if (maskData) {
            text.replace(selstart, selend - selstart,  clearString(selstart, selend - selstart));
            for (int i = 0; i < selend - selstart; ++i)
                addCommand(Command(Insert, selstart + i, text[selstart + i], -1, -1));
        } else {
            text.erase(selstart, selend - selstart);
        }
        if (cursor > selstart)
            cursor -= qMin(cursor, selend) - selstart;
        deselect();
        textDirty = true;

        // adjust hscroll to avoid gap
        const int minRB = qMax(0, -q_func()->fontMetrics().minRightBearing());
        updateTextLayout();
        const QTextLine line = textLayout.lineAt(0);
        const int widthUsed = qRound(line.naturalTextWidth()) + 1 + minRB;
        hscroll = qMin(hscroll, widthUsed);
    }
}

void QSecureLineEditPrivate::parseInputMask(const QString &maskFields)
{
    int delimiter = maskFields.indexOf(QLatin1Char(';'));
    if (maskFields.isEmpty() || delimiter == 0) {
        if (maskData) {
            delete [] maskData;
            maskData = 0;
            maxLength = 32767;
            setText(secqstring());
        }
        return;
    }

    if (delimiter == -1) {
        blank = QLatin1Char(' ');
        inputMask = maskFields;
    } else {
        inputMask = maskFields.left(delimiter);
        blank = (delimiter + 1 < maskFields.length()) ? maskFields[delimiter + 1] : QLatin1Char(' ');
    }

    // calculate maxLength / maskData length
    maxLength = 0;
    QChar c = 0;
    for (int i=0; i<inputMask.length(); i++) {
        c = inputMask.at(i);
        if (i > 0 && inputMask.at(i-1) == QLatin1Char('\\')) {
            maxLength++;
            continue;
        }
        if (c != QLatin1Char('\\') && c != QLatin1Char('!') &&
             c != QLatin1Char('<') && c != QLatin1Char('>') &&
             c != QLatin1Char('{') && c != QLatin1Char('}') &&
             c != QLatin1Char('[') && c != QLatin1Char(']'))
            maxLength++;
    }

    delete [] maskData;
    maskData = new MaskInputData[maxLength];

    MaskInputData::Casemode m = MaskInputData::NoCaseMode;
    c = 0;
    bool s;
    bool escape = false;
    int index = 0;
    for (int i = 0; i < inputMask.length(); i++) {
        c = inputMask.at(i);
        if (escape) {
            s = true;
            maskData[index].maskChar = c;
            maskData[index].separator = s;
            maskData[index].caseMode = m;
            index++;
            escape = false;
        } else if (c == QLatin1Char('<')) {
                m = MaskInputData::Lower;
        } else if (c == QLatin1Char('>')) {
            m = MaskInputData::Upper;
        } else if (c == QLatin1Char('!')) {
            m = MaskInputData::NoCaseMode;
        } else if (c != QLatin1Char('{') && c != QLatin1Char('}') && c != QLatin1Char('[') && c != QLatin1Char(']')) {
            switch (c.unicode()) {
            case 'A':
            case 'a':
            case 'N':
            case 'n':
            case 'X':
            case 'x':
            case '9':
            case '0':
            case 'D':
            case 'd':
            case '#':
            case 'H':
            case 'h':
            case 'B':
            case 'b':
                s = false;
                break;
            case '\\':
                escape = true;
            default:
                s = true;
                break;
            }

            if (!escape) {
                maskData[index].maskChar = c;
                maskData[index].separator = s;
                maskData[index].caseMode = m;
                index++;
            }
        }
    }
    setText(text);
}


/* checks if the key is valid compared to the inputMask */
bool QSecureLineEditPrivate::isValidInput(QChar key, QChar mask) const
{
    switch (mask.unicode()) {
    case 'A':
        if (key.isLetter())
            return true;
        break;
    case 'a':
        if (key.isLetter() || key == blank)
            return true;
        break;
    case 'N':
        if (key.isLetterOrNumber())
            return true;
        break;
    case 'n':
        if (key.isLetterOrNumber() || key == blank)
            return true;
        break;
    case 'X':
        if (key.isPrint())
            return true;
        break;
    case 'x':
        if (key.isPrint() || key == blank)
            return true;
        break;
    case '9':
        if (key.isNumber())
            return true;
        break;
    case '0':
        if (key.isNumber() || key == blank)
            return true;
        break;
    case 'D':
        if (key.isNumber() && key.digitValue() > 0)
            return true;
        break;
    case 'd':
        if ((key.isNumber() && key.digitValue() > 0) || key == blank)
            return true;
        break;
    case '#':
        if (key.isNumber() || key == QLatin1Char('+') || key == QLatin1Char('-') || key == blank)
            return true;
        break;
    case 'B':
        if (key == QLatin1Char('0') || key == QLatin1Char('1'))
            return true;
        break;
    case 'b':
        if (key == QLatin1Char('0') || key == QLatin1Char('1') || key == blank)
            return true;
        break;
    case 'H':
        if (key.isNumber() || (key >= QLatin1Char('a') && key <= QLatin1Char('f')) || (key >= QLatin1Char('A') && key <= QLatin1Char('F')))
            return true;
        break;
    case 'h':
        if (key.isNumber() || (key >= QLatin1Char('a') && key <= QLatin1Char('f')) || (key >= QLatin1Char('A') && key <= QLatin1Char('F')) || key == blank)
            return true;
        break;
    default:
        break;
    }
    return false;
}

bool QSecureLineEditPrivate::hasAcceptableInput(const secqstring &str) const
{
#ifndef QT_NO_VALIDATOR
    QString textCopy = str;
    int cursorCopy = cursor;
    if (validator && validator->validate(textCopy, cursorCopy)
        != QValidator::Acceptable)
        return false;
#endif

    if (!maskData)
        return true;

    if (str.length() != maxLength)
        return false;

    for (int i=0; i < maxLength; ++i) {
        if (maskData[i].separator) {
            if (str[i] != maskData[i].maskChar)
                return false;
        } else {
            if (!isValidInput(str[i], maskData[i].maskChar))
                return false;
        }
    }
    return true;
}

/*
  Applies the inputMask on \a str starting from position \a pos in the mask. \a clear
  specifies from where characters should be gotten when a separator is met in \a str - true means
  that blanks will be used, false that previous input is used.
  Calling this when no inputMask is set is undefined.
*/
secqstring QSecureLineEditPrivate::maskString(uint pos, const secqstring &str, bool clear) const
{
    if (pos >= (uint)maxLength)
        return secqstring();

    secqstring fill;
    fill = clear ? clearString(0, maxLength) : text;

    int strIndex = 0;
    secqstring s;
    int i = pos;
    while (i < maxLength) {
        if (strIndex < str.length()) {
            if (maskData[i].separator) {
                s += maskData[i].maskChar;
                if (str[(int)strIndex] == maskData[i].maskChar)
                    strIndex++;
                ++i;
            } else {
                if (isValidInput(str[(int)strIndex], maskData[i].maskChar)) {
                    switch (maskData[i].caseMode) {
                    case MaskInputData::Upper:
                        s += str[(int)strIndex].toUpper();
                        break;
                    case MaskInputData::Lower:
                        s += str[(int)strIndex].toLower();
                        break;
                    default:
                        s += str[(int)strIndex];
                    }
                    ++i;
                } else {
                    // search for separator first
                    int n = findInMask(i, true, true, str[(int)strIndex]);
                    if (n != -1) {
                        if (str.length() != 1 || i == 0 || (i > 0 && (!maskData[i-1].separator || maskData[i-1].maskChar != str[(int)strIndex]))) {
                            s += fill.substr(i, n-i+1);
                            i = n + 1; // update i to find + 1
                        }
                    } else {
                        // search for valid blank if not
                        n = findInMask(i, true, false, str[(int)strIndex]);
                        if (n != -1) {
                            s += fill.substr(i, n-i);
                            switch (maskData[n].caseMode) {
                            case MaskInputData::Upper:
                                s += str[(int)strIndex].toUpper();
                                break;
                            case MaskInputData::Lower:
                                s += str[(int)strIndex].toLower();
                                break;
                            default:
                                s += str[(int)strIndex];
                            }
                            i = n + 1; // updates i to find + 1
                        }
                    }
                }
                strIndex++;
            }
        } else
            break;
    }

    return s;
}



/*
  Returns a "cleared" string with only separators and blank chars.
  Calling this when no inputMask is set is undefined.
*/
secqstring QSecureLineEditPrivate::clearString(uint pos, uint len) const
{
    if (pos >= (uint)maxLength)
        return secqstring();

    secqstring s;
    int end = qMin((uint)maxLength, pos + len);
    for (int i=pos; i<end; i++)
        if (maskData[i].separator)
            s += maskData[i].maskChar;
        else
            s += blank;

    return s;
}

/*
  Strips blank parts of the input in a QSecureLineEdit when an inputMask is set,
  separators are still included. Typically "127.0__.0__.1__" becomes "127.0.0.1".
*/
secqstring QSecureLineEditPrivate::stripString(const secqstring &str) const
{
    if (!maskData)
        return str;

    secqstring s;
    int end = qMin(maxLength, (int)str.size());
    for (int i=0; i < end; i++)
        if (maskData[i].separator)
            s += maskData[i].maskChar;
        else
            if (str[i] != blank)
                s += str[i];

    return s;
}

/* searches forward/backward in maskData for either a separator or a blank */
int QSecureLineEditPrivate::findInMask(int pos, bool forward, bool findSeparator, QChar searchChar) const
{
    if (pos >= maxLength || pos < 0)
        return -1;

    int end = forward ? maxLength : -1;
    int step = forward ? 1 : -1;
    int i = pos;

    while (i != end) {
        if (findSeparator) {
            if (maskData[i].separator && maskData[i].maskChar == searchChar)
                return i;
        } else {
            if (!maskData[i].separator) {
                if (searchChar.isNull())
                    return i;
                else if (isValidInput(searchChar, maskData[i].maskChar))
                    return i;
            }
        }
        i += step;
    }
    return -1;
}

void QSecureLineEditPrivate::undo(int until)
{
    if (!isUndoAvailable())
        return;
    deselect();
    while (undoState && undoState > until) {
        Command& cmd = history[--undoState];
        switch (cmd.type) {
        case Insert:
            text.erase(cmd.pos, 1);
            cursor = cmd.pos;
            break;
        case SetSelection:
            selstart = cmd.selStart;
            selend = cmd.selEnd;
            cursor = cmd.pos;
            break;
        case Remove:
        case RemoveSelection:
            text.insert(cmd.pos, &cmd.uc, 1);
            cursor = cmd.pos + 1;
            break;
        case Delete:
        case DeleteSelection:
            text.insert(cmd.pos, &cmd.uc, 1);
            cursor = cmd.pos;
            break;
        case Separator:
            continue;
        }
        if (until < 0 && undoState) {
            Command& next = history[undoState-1];
            if (next.type != cmd.type && next.type < RemoveSelection
                 && (cmd.type < RemoveSelection || next.type == Separator))
                break;
        }
    }
    textDirty = true;
    emitCursorPositionChanged();
}

void QSecureLineEditPrivate::redo() {
    if (!isRedoAvailable())
        return;
    deselect();
    while (undoState < (int)history.size()) {
        Command& cmd = history[undoState++];
        switch (cmd.type) {
        case Insert:
            text.insert(cmd.pos, &cmd.uc, 1);
            cursor = cmd.pos + 1;
            break;
        case SetSelection:
            selstart = cmd.selStart;
            selend = cmd.selEnd;
            cursor = cmd.pos;
            break;
        case Remove:
        case Delete:
        case RemoveSelection:
        case DeleteSelection:
            text.erase(cmd.pos, 1);
            cursor = cmd.pos;
            break;
        case Separator:
            selstart = cmd.selStart;
            selend = cmd.selEnd;
            cursor = cmd.pos;
            break;
        }
        if (undoState < (int)history.size()) {
            Command& next = history[undoState];
            if (next.type != cmd.type && cmd.type < RemoveSelection && next.type != Separator
                 && (next.type < RemoveSelection || cmd.type == Separator))
                break;
        }
    }
    textDirty = true;
    emitCursorPositionChanged();
}

/*!
    \fn void QSecureLineEdit::repaintArea(int a, int b)

    Use update() instead.
*/

/*!
    \fn void QSecureLineEdit::cursorLeft(bool mark, int steps)

    Use cursorForward() with a negative number of steps instead. For
    example, cursorForward(mark, -steps).
*/

/*!
    \fn void QSecureLineEdit::cursorRight(bool mark, int steps)

    Use cursorForward() instead.
*/

/*!
    \fn bool QSecureLineEdit::frame() const

    Use hasFrame() instead.
*/

/*!
    \fn void QSecureLineEdit::clearValidator()

    Use setValidator(0) instead.
*/

/*!
    \fn bool QSecureLineEdit::hasMarkedText() const

    Use hasSelectedText() instead.
*/

/*!
    \fn QString QSecureLineEdit::markedText() const

    Use selectedText() instead.
*/

/*!
    \fn void QSecureLineEdit::setFrameRect(QRect)
    \internal
*/

/*!
    \fn QRect QSecureLineEdit::frameRect() const
    \internal
*/
/*!
    \enum QSecureLineEdit::DummyFrame
    \internal

    \value Box
    \value Sunken
    \value Plain
    \value Raised
    \value MShadow
    \value NoFrame
    \value Panel
    \value StyledPanel
    \value HLine
    \value VLine
    \value GroupBoxPanel
    \value WinPanel
    \value ToolBarPanel
    \value MenuBarPanel
    \value PopupPanel
    \value LineEditPanel
    \value TabWidgetPanel
    \value MShape
*/

/*!
    \fn void QSecureLineEdit::setFrameShadow(DummyFrame)
    \internal
*/

/*!
    \fn DummyFrame QSecureLineEdit::frameShadow() const
    \internal
*/

/*!
    \fn void QSecureLineEdit::setFrameShape(DummyFrame)
    \internal
*/

/*!
    \fn DummyFrame QSecureLineEdit::frameShape() const
    \internal
*/

/*!
    \fn void QSecureLineEdit::setFrameStyle(int)
    \internal
*/

/*!
    \fn int QSecureLineEdit::frameStyle() const
    \internal
*/

/*!
    \fn int QSecureLineEdit::frameWidth() const
    \internal
*/

/*!
    \fn void QSecureLineEdit::setLineWidth(int)
    \internal
*/

/*!
    \fn int QSecureLineEdit::lineWidth() const
    \internal
*/

/*!
    \fn void QSecureLineEdit::setMargin(int margin)
    Sets the width of the margin around the contents of the widget to \a margin.

    Use QWidget::setContentsMargins() instead.
    \sa margin(), QWidget::setContentsMargins()
*/

/*!
    \fn int QSecureLineEdit::margin() const
    Returns the with of the the margin around the contents of the widget.

    Use QWidget::getContentsMargins() instead.
    \sa setMargin(), QWidget::getContentsMargins()
*/

/*!
    \fn void QSecureLineEdit::setMidLineWidth(int)
    \internal
*/

/*!
    \fn int QSecureLineEdit::midLineWidth() const
    \internal
*/

QT_END_NAMESPACE

#include "qsecurelineedit.moc"

#endif // QT_NO_LINEEDIT