Long live Qt 4.5!

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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QLINEEDIT_P_H
+#define QLINEEDIT_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "QtCore/qglobal.h"
+
+#ifndef QT_NO_LINEEDIT
+#include "private/qwidget_p.h"
+#include "QtGui/qlineedit.h"
+#include "QtGui/qtextlayout.h"
+#include "QtGui/qstyleoption.h"
+#include "QtCore/qbasictimer.h"
+#include "QtGui/qcompleter.h"
+#include "QtCore/qpointer.h"
+#include "QtGui/qlineedit.h"
+
+QT_BEGIN_NAMESPACE
+
+class QLineEditPrivate : public QWidgetPrivate
+{
+    Q_DECLARE_PUBLIC(QLineEdit)
+public:
+
+    QLineEditPrivate()
+        : cursor(0), preeditCursor(0), cursorTimer(0), frame(1),
+          cursorVisible(0), hideCursor(false), separator(0), readOnly(0),
+          dragEnabled(0), contextMenuEnabled(1), echoMode(0), textDirty(0),
+          selDirty(0), validInput(1), alignment(Qt::AlignLeading | Qt::AlignVCenter), ascent(0),
+          maxLength(32767), hscroll(0), vscroll(0), lastCursorPos(-1), maskData(0),
+          modifiedState(0), undoState(0), selstart(0), selend(0), userInput(false),
+          emitingEditingFinished(false), passwordEchoEditing(false)
+#ifndef QT_NO_COMPLETER
+        , completer(0)
+#endif
+        , leftTextMargin(0), topTextMargin(0), rightTextMargin(0), bottomTextMargin(0)
+        {
+        }
+
+    ~QLineEditPrivate()
+    {
+        delete [] maskData;
+    }
+    void init(const QString&);
+
+    QString text;
+    int cursor;
+    int preeditCursor;
+    int cursorTimer; // -1 for non blinking cursor.
+    QPoint tripleClick;
+    QBasicTimer tripleClickTimer;
+    uint frame : 1;
+    uint cursorVisible : 1;
+    uint hideCursor : 1; // used to hide the cursor inside preedit areas
+    uint separator : 1;
+    uint readOnly : 1;
+    uint dragEnabled : 1;
+    uint contextMenuEnabled : 1;
+    uint echoMode : 2;
+    uint textDirty : 1;
+    uint selDirty : 1;
+    uint validInput : 1;
+    uint alignment;
+    int ascent;
+    int maxLength;
+    int hscroll;
+    int vscroll;
+    int lastCursorPos;
+
+#ifndef QT_NO_CONTEXTMENU
+    QPointer<QAction> selectAllAction;
+#endif
+
+    inline void emitCursorPositionChanged();
+    bool sendMouseEventToInputContext(QMouseEvent *e);
+
+    void finishChange(int validateFromState = -1, bool update = false, bool edited = true);
+
+    QPointer<QValidator> validator;
+    struct MaskInputData {
+        enum Casemode { NoCaseMode, Upper, Lower };
+        QChar maskChar; // either the separator char or the inputmask
+        bool separator;
+        Casemode caseMode;
+    };
+    QString inputMask;
+    QChar blank;
+    MaskInputData *maskData;
+    inline int nextMaskBlank(int pos) {
+        int c = findInMask(pos, true, false);
+        separator |= (c != pos);
+        return (c != -1 ?  c : maxLength);
+    }
+    inline int prevMaskBlank(int pos) {
+        int c = findInMask(pos, false, false);
+        separator |= (c != pos);
+        return (c != -1 ? c : 0);
+    }
+
+    void setCursorVisible(bool visible);
+
+
+    // undo/redo handling
+    enum CommandType { Separator, Insert, Remove, Delete, RemoveSelection, DeleteSelection, SetSelection };
+    struct Command {
+        inline Command() {}
+        inline Command(CommandType t, int p, QChar c, int ss, int se) : type(t),uc(c),pos(p),selStart(ss),selEnd(se) {}
+        uint type : 4;
+        QChar uc;
+        int pos, selStart, selEnd;
+    };
+    int modifiedState;
+    int undoState;
+    QVector<Command> history;
+    void addCommand(const Command& cmd);
+    void insert(const QString& s);
+    void del(bool wasBackspace = false);
+    void remove(int pos);
+
+    inline void separate() { separator = true; }
+    void undo(int until = -1);
+    void redo();
+    inline bool isUndoAvailable() const { return !readOnly && undoState; }
+    inline bool isRedoAvailable() const { return !readOnly && undoState < (int)history.size(); }
+
+    // selection
+    int selstart, selend;
+    inline bool allSelected() const { return !text.isEmpty() && selstart == 0 && selend == (int)text.length(); }
+    inline bool hasSelectedText() const { return !text.isEmpty() && selend > selstart; }
+    inline void deselect() { selDirty |= (selend > selstart); selstart = selend = 0; }
+    void removeSelectedText();
+#ifndef QT_NO_CLIPBOARD
+    void copy(bool clipboard = true) const;
+#endif
+    inline bool inSelection(int x) const
+    { if (selstart >= selend) return false;
+    int pos = xToPos(x, QTextLine::CursorOnCharacter);  return pos >= selstart && pos < selend; }
+
+    // masking
+    void parseInputMask(const QString &maskFields);
+    bool isValidInput(QChar key, QChar mask) const;
+    bool hasAcceptableInput(const QString &text) const;
+    QString maskString(uint pos, const QString &str, bool clear = false) const;
+    QString clearString(uint pos, uint len) const;
+    QString stripString(const QString &str) const;
+    int findInMask(int pos, bool forward, bool findSeparator, QChar searchChar = QChar()) const;
+
+    // input methods
+    bool composeMode() const { return !textLayout.preeditAreaText().isEmpty(); }
+
+    // complex text layout
+    QTextLayout textLayout;
+    void updateTextLayout();
+    void moveCursor(int pos, bool mark = false);
+    void setText(const QString& txt, int pos = -1, bool edited = true);
+    int xToPos(int x, QTextLine::CursorPosition = QTextLine::CursorBetweenCharacters) const;
+    QRect cursorRect() const;
+    bool fixup();
+
+    QRect adjustedContentsRect() const;
+
+#ifndef QT_NO_DRAGANDDROP
+    // drag and drop
+    QPoint dndPos;
+    QBasicTimer dndTimer;
+    void drag();
+#endif
+
+    void _q_clipboardChanged();
+    void _q_handleWindowActivate();
+    void _q_deleteSelected();
+    bool userInput;
+    bool emitingEditingFinished;
+
+#ifdef QT_KEYPAD_NAVIGATION
+    QBasicTimer deleteAllTimer; // keypad navigation
+    QString origText;
+#endif
+
+    bool passwordEchoEditing;
+    void updatePasswordEchoEditing(bool editing);
+
+#ifndef QT_NO_COMPLETER
+    QPointer<QCompleter> completer;
+    void complete(int key = -1);
+    void _q_completionHighlighted(QString);
+    bool advanceToEnabledItem(int n);
+#endif
+
+    int leftTextMargin;
+    int topTextMargin;
+    int rightTextMargin;
+    int bottomTextMargin;
+};
+
+#endif // QT_NO_LINEEDIT
+
+QT_END_NAMESPACE
+
+#endif // QLINEEDIT_P_H