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

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** This file is part of the QtGui module of the Qt Toolkit.

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** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

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**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

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** If you have questions regarding the use of this file, please contact

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** $QT_END_LICENSE$

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

#include "qlineedit.h"

#include "qlineedit_p.h"

#ifndef QT_NO_LINEEDIT

#include "qabstractitemview.h"

#include "qclipboard.h"

#ifndef QT_NO_ACCESSIBILITY

#include "qaccessible.h"

#endif

#ifndef QT_NO_IM

#include "qinputcontext.h"

#include "qlist.h"

#endif

QT_BEGIN_NAMESPACE

const int QLineEditPrivate::verticalMargin(1);

const int QLineEditPrivate::horizontalMargin(2);

int QLineEditPrivate::xToPos(int x, QTextLine::CursorPosition betweenOrOn) const

{

    QRect cr = adjustedContentsRect();

    x-= cr.x() - hscroll + horizontalMargin;

    return control->xToPos(x, betweenOrOn);

}

QRect QLineEditPrivate::cursorRect() const

{

    QRect cr = adjustedContentsRect();

    int cix = cr.x() - hscroll + horizontalMargin;

    QRect crect = control->cursorRect();

    crect.moveTo(crect.topLeft() + QPoint(cix, vscroll));

    return crect;

}

#ifndef QT_NO_COMPLETER

void QLineEditPrivate::_q_completionHighlighted(QString newText)

{

    Q_Q(QLineEdit);

    if (control->completer()->completionMode() != QCompleter::InlineCompletion) {

        q->setText(newText);

    } else {

        int c = control->cursor();

        QString text = control->text();

        q->setText(text.left(c) + newText.mid(c));

        control->moveCursor(control->end(), false);

        control->moveCursor(c, true);

    }

}

#endif // QT_NO_COMPLETER

void QLineEditPrivate::_q_handleWindowActivate()

{

    Q_Q(QLineEdit);

    if (!q->hasFocus() && control->hasSelectedText())

        control->deselect();

}

void QLineEditPrivate::_q_textEdited(const QString &text)

{

    Q_Q(QLineEdit);

    emit q->textEdited(text);

#ifndef QT_NO_COMPLETER

    if (control->completer()

        && control->completer()->completionMode() != QCompleter::InlineCompletion)

        control->complete(-1); // update the popup on cut/paste/del

#endif

}

void QLineEditPrivate::_q_cursorPositionChanged(int from, int to)

{

    Q_Q(QLineEdit);

    q->update();

    emit q->cursorPositionChanged(from, to);

}

#ifdef QT_KEYPAD_NAVIGATION

void QLineEditPrivate::_q_editFocusChange(bool e)

{

    Q_Q(QLineEdit);

    q->setEditFocus(e);

}

#endif

void QLineEditPrivate::_q_selectionChanged()

{

    Q_Q(QLineEdit);

    if (!control->text().isEmpty() && control->preeditAreaText().isEmpty()) {

        QStyleOptionFrameV2 opt;

        q->initStyleOption(&opt);

        bool showCursor = control->hasSelectedText() ?

                          q->style()->styleHint(QStyle::SH_BlinkCursorWhenTextSelected, &opt, q):

                          q->hasFocus();

        setCursorVisible(showCursor);

    }

    emit q->selectionChanged();

}

void QLineEditPrivate::init(const QString& txt)

{

    Q_Q(QLineEdit);

    control = new QLineControl(txt);

    control->setFont(q->font());

    QObject::connect(control, SIGNAL(textChanged(QString)),

            q, SIGNAL(textChanged(QString)));

    QObject::connect(control, SIGNAL(textEdited(QString)),

            q, SLOT(_q_textEdited(QString)));

    QObject::connect(control, SIGNAL(cursorPositionChanged(int,int)),

            q, SLOT(_q_cursorPositionChanged(int,int)));

    QObject::connect(control, SIGNAL(selectionChanged()),

            q, SLOT(_q_selectionChanged()));

    QObject::connect(control, SIGNAL(accepted()),

            q, SIGNAL(returnPressed()));

    QObject::connect(control, SIGNAL(editingFinished()),

            q, SIGNAL(editingFinished()));

#ifdef QT_KEYPAD_NAVIGATION

    QObject::connect(control, SIGNAL(editFocusChange(bool)),

            q, SLOT(_q_editFocusChange(bool)));

#endif

    QObject::connect(control, SIGNAL(cursorPositionChanged(int,int)),

            q, SLOT(updateMicroFocus()));

    QObject::connect(control, SIGNAL(textChanged(const QString &)),

            q, SLOT(updateMicroFocus()));

    // for now, going completely overboard with updates.

    QObject::connect(control, SIGNAL(selectionChanged()),

            q, SLOT(update()));

    QObject::connect(control, SIGNAL(displayTextChanged(QString)),

            q, SLOT(update()));

    QObject::connect(control, SIGNAL(updateNeeded(QRect)),

            q, SLOT(update()));

    QStyleOptionFrameV2 opt;

    q->initStyleOption(&opt);

    control->setPasswordCharacter(q->style()->styleHint(QStyle::SH_LineEdit_PasswordCharacter, &opt, q));

#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);

    q->setAttribute(Qt::WA_MacShowFocusRect);

}

QRect QLineEditPrivate::adjustedContentsRect() const

{

    Q_Q(const QLineEdit);

    QStyleOptionFrameV2 opt;

    q->initStyleOption(&opt);

    QRect r = q->style()->subElementRect(QStyle::SE_LineEditContents, &opt, q);

    r.setX(r.x() + leftTextMargin);

    r.setY(r.y() + topTextMargin);

    r.setRight(r.right() - rightTextMargin);

    r.setBottom(r.bottom() - bottomTextMargin);

    return r;

}

void QLineEditPrivate::setCursorVisible(bool visible)

{

    Q_Q(QLineEdit);

    if ((bool)cursorVisible == visible)

        return;

    cursorVisible = visible;

    QRect r = cursorRect();

    if (control->inputMask().isEmpty())

        q->update(r);

    else

        q->update();

}

void QLineEditPrivate::updatePasswordEchoEditing(bool editing)

{

    Q_Q(QLineEdit);

    control->updatePasswordEchoEditing(editing);

    q->setAttribute(Qt::WA_InputMethodEnabled, shouldEnableInputMethod());

}

/*!

  This function is not intended as polymorphic usage. Just a shared code

  fragment that calls QInputContext::mouseHandler for this

  class.

*/

bool QLineEditPrivate::sendMouseEventToInputContext( QMouseEvent *e )

{

#if !defined QT_NO_IM

    Q_Q(QLineEdit);

    if ( control->composeMode() ) {

	int tmp_cursor = xToPos(e->pos().x());

	int mousePos = tmp_cursor - control->cursor();

	if ( mousePos < 0 || mousePos > control->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 (!control->preeditAreaText().isEmpty())

            return true;

    }

#else

    Q_UNUSED(e);

#endif

    return false;

}

#ifndef QT_NO_DRAGANDDROP

void QLineEditPrivate::drag()

{

    Q_Q(QLineEdit);

    dndTimer.stop();

    QMimeData *data = new QMimeData;

    data->setText(control->selectedText());

    QDrag *drag = new QDrag(q);

    drag->setMimeData(data);

    Qt::DropAction action = drag->start();

    if (action == Qt::MoveAction && !control->isReadOnly() && drag->target() != q)

        control->removeSelection();

}

#endif // QT_NO_DRAGANDDROP

QT_END_NAMESPACE

#endif