// This module defines the "official" high-level API of the Qt port of
// Scintilla.
//
// Copyright (c) 2011 Riverbank Computing Limited <info@riverbankcomputing.com>
// 
// This file is part of QScintilla.
// 
// This file may be used under the terms of the GNU General Public
// License versions 2.0 or 3.0 as published by the Free Software
// Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
// included in the packaging of this file.  Alternatively you may (at
// your option) use any later version of the GNU General Public
// License if such license has been publicly approved by Riverbank
// Computing Limited (or its successors, if any) and the KDE Free Qt
// Foundation. In addition, as a special exception, Riverbank gives you
// certain additional rights. These rights are described in the Riverbank
// GPL Exception version 1.1, which can be found in the file
// GPL_EXCEPTION.txt in this package.
// 
// Please review the following information to ensure GNU General
// Public Licensing requirements will be met:
// http://trolltech.com/products/qt/licenses/licensing/opensource/. If
// you are unsure which license is appropriate for your use, please
// review the following information:
// http://trolltech.com/products/qt/licenses/licensing/licensingoverview
// or contact the sales department at sales@riverbankcomputing.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.


#ifndef QSCISCINTILLA_H
#define QSCISCINTILLA_H

#ifdef __APPLE__
extern "C++" {
#endif

#include <qobject.h>
#include <qstringlist.h>

#include <QByteArray>
#include <QList>
#include <QPointer>

#include <Qsci/qsciglobal.h>
#include <Qsci/qscidocument.h>
#include <Qsci/qsciscintillabase.h>


QT_BEGIN_NAMESPACE
class QIODevice;
class QPoint;
QT_END_NAMESPACE

class QsciCommandSet;
class QsciLexer;
class QsciStyle;
class QsciStyledText;
class ListBoxQt;


//! \brief The QsciScintilla class implements a higher level, more Qt-like,
//! API to the Scintilla editor widget.
//!
//! QsciScintilla implements methods, signals and slots similar to those found
//! in other Qt editor classes. It also provides a higher level interface to
//! features specific to Scintilla such as syntax styling, call tips,
//! auto-indenting and auto-completion than that provided by QsciScintillaBase.
class QSCINTILLA_EXPORT QsciScintilla : public QsciScintillaBase
{
    Q_OBJECT

public:
    //! This enum defines the different auto-indentation styles.
    enum {
        //! A line is automatically indented to match the previous line.
        AiMaintain = 0x01,

        //! If the language supported by the current lexer has a specific start
        //! of block character (e.g. { in C++), then a line that begins with
        //! that character is indented as well as the lines that make up the
        //! block.  It may be logically ored with AiClosing.
        AiOpening = 0x02,

        //! If the language supported by the current lexer has a specific end
        //! of block character (e.g. } in C++), then a line that begins with
        //! that character is indented as well as the lines that make up the
        //! block.  It may be logically ored with AiOpening.
        AiClosing = 0x04
    };

    //! This enum defines the different annotation display styles.
    enum AnnotationDisplay {
        //! Annotations are not displayed.
        AnnotationHidden = ANNOTATION_HIDDEN,

        //! Annotations are drawn left justified with no adornment.
        AnnotationStandard = ANNOTATION_STANDARD,

        //! Annotations are surrounded by a box.
        AnnotationBoxed = ANNOTATION_BOXED
    };

    //! This enum defines the behavior if an auto-completion list contains a
    //! single entry.
    enum AutoCompletionUseSingle {
        //! The single entry is not used automatically and the auto-completion
        //! list is displayed.
        AcusNever,

        //! The single entry is used automatically when auto-completion is
        //! explicitly requested (using autoCompleteFromAPIs() or
        //! autoCompleteFromDocument()) but not when auto-completion is
        //! triggered as the user types.
        AcusExplicit,

        //! The single entry is used automatically and the auto-completion list
        //! is not displayed.
        AcusAlways
    };

    //! This enum defines the different sources for auto-completion lists.
    enum AutoCompletionSource {
        //! No sources are used, ie. automatic auto-completion is disabled.
        AcsNone,

        //! The source is all available sources.
        AcsAll,

        //! The source is the current document.
        AcsDocument,

        //! The source is any installed APIs.
        AcsAPIs
    };

    //! This enum defines the different brace matching modes.  The character
    //! pairs {}, [] and () are treated as braces.  The Python lexer will also
    //! match a : with the end of the corresponding indented block.
    enum BraceMatch {
        //! Brace matching is disabled.
        NoBraceMatch,

        //! Brace matching is enabled for a brace immediately before the
        //! current position.
        StrictBraceMatch,

        //! Brace matching is enabled for a brace immediately before or after
        //! the current position.
        SloppyBraceMatch
    };

    //! This enum defines the different call tip styles.
    enum CallTipsStyle {
        //! Call tips are disabled.
        CallTipsNone,

        //! Call tips are displayed without a context.  A context is any scope
        //! (e.g. a C++ namespace or a Python module) prior to the function
        //! name.
        CallTipsNoContext,

        //! Call tips are displayed with a context only if the user hasn't
        //! already implicitly identified the context using autocompletion.
        //! Note that this style may not always be able to align the call tip
        //! with the text being entered.
        CallTipsNoAutoCompletionContext,

        //! Call tips are displayed with a context.  Note that this style
        //! may not always be able to align the call tip with the text being
        //! entered.
        CallTipsContext
    };

    //! This enum defines the different edge modes for long lines.
    enum EdgeMode {
        //! Long lines are not marked.
        EdgeNone = EDGE_NONE,

        //! A vertical line is drawn at the column set by setEdgeColumn().
        //! This is recommended for monospace fonts.
        EdgeLine = EDGE_LINE,

        //! The background color of characters after the column limit is
        //! changed to the color set by setEdgeColor().  This is recommended
        //! for proportional fonts.
        EdgeBackground = EDGE_BACKGROUND
    };

    //! This enum defines the different end-of-line modes.
    enum EolMode {
        //! A carriage return/line feed as used on Windows systems.
        EolWindows = SC_EOL_CRLF,

        //! A line feed as used on Unix systems.
        EolUnix = SC_EOL_LF,

        //! A carriage return as used on Mac systems.
        EolMac = SC_EOL_CR
    };

    //! This enum defines the different styles for the folding margin.
    enum FoldStyle {
        //! Folding is disabled.
        NoFoldStyle,

        //! Plain folding style using plus and minus symbols.
        PlainFoldStyle,

        //! Circled folding style using circled plus and minus symbols.
        CircledFoldStyle,

        //! Boxed folding style using boxed plus and minus symbols.
        BoxedFoldStyle,

        //! Circled tree style using a flattened tree with circled plus and
        //! minus symbols and rounded corners.
        CircledTreeFoldStyle,

        //! Boxed tree style using a flattened tree with boxed plus and minus
        //! symbols and right-angled corners.
        BoxedTreeFoldStyle
    };

    //! This enum defines the different indicator styles.
    enum IndicatorStyle {
        // A single straight underline.
        PlainIndicator = INDIC_PLAIN,

        // A squiggly underline.
        SquiggleIndicator = INDIC_SQUIGGLE,

        // A line of small T shapes.
        TTIndicator = INDIC_TT,

        // Diagonal hatching.
        DiagonalIndicator = INDIC_DIAGONAL,

        // Strike out.
        StrikeIndicator = INDIC_STRIKE,

        // An indicator with no visual appearence.
        HiddenIndicator = INDIC_HIDDEN,

        // A rectangle around the text.
        BoxIndicator = INDIC_BOX,

        // A rectangle with rounded corners around the text with the interior
        // more transparent than the border.
        RoundBoxIndicator = INDIC_ROUNDBOX
    };

    //! This enum defines the different margin types.
    enum MarginType {
        //! The margin contains symbols, including those used for folding.
        SymbolMargin = SC_MARGIN_SYMBOL,

        //! The margin contains symbols and uses the default foreground color
        //! as its background color.
        SymbolMarginDefaultForegroundColor = SC_MARGIN_FORE,

        //! The margin contains symbols and uses the default background color
        //! as its background color.
        SymbolMarginDefaultBackgroundColor = SC_MARGIN_BACK,

        //! The margin contains line numbers.
        NumberMargin = SC_MARGIN_NUMBER,

        //! The margin contains styled text.
        TextMargin = SC_MARGIN_TEXT,

        //! The margin contains right justified styled text.
        TextMarginRightJustified = SC_MARGIN_RTEXT
    };

    //! This enum defines the different pre-defined marker symbols.
    enum MarkerSymbol {
        //! A circle.
        Circle = SC_MARK_CIRCLE,

        //! A rectangle.
        Rectangle = SC_MARK_ROUNDRECT,

        //! A triangle pointing to the right.
        RightTriangle = SC_MARK_ARROW,

        //! A smaller rectangle.
        SmallRectangle = SC_MARK_SMALLRECT,

        //! An arrow pointing to the right.
        RightArrow = SC_MARK_SHORTARROW,

        //! An invisible marker that allows code to track the movement
        //! of lines.
        Invisible = SC_MARK_EMPTY,

        //! A triangle pointing down.
        DownTriangle = SC_MARK_ARROWDOWN,

        //! A drawn minus sign.
        Minus = SC_MARK_MINUS,

        //! A drawn plus sign.
        Plus = SC_MARK_PLUS,

        //! A vertical line drawn in the background colour.
        VerticalLine = SC_MARK_VLINE,

        //! A bottom left corner drawn in the background colour.
        BottomLeftCorner = SC_MARK_LCORNER,

        //! A vertical line with a centre right horizontal line drawn
        //! in the background colour.
        LeftSideSplitter = SC_MARK_TCORNER,

        //! A drawn plus sign in a box.
        BoxedPlus = SC_MARK_BOXPLUS,

        //! A drawn plus sign in a connected box.
        BoxedPlusConnected = SC_MARK_BOXPLUSCONNECTED,

        //! A drawn minus sign in a box.
        BoxedMinus = SC_MARK_BOXMINUS,

        //! A drawn minus sign in a connected box.
        BoxedMinusConnected = SC_MARK_BOXMINUSCONNECTED,

        //! A rounded bottom left corner drawn in the background
        //! colour.
        RoundedBottomLeftCorner = SC_MARK_LCORNERCURVE,

        //! A vertical line with a centre right curved line drawn in the
        //! background colour.
        LeftSideRoundedSplitter = SC_MARK_TCORNERCURVE,

        //! A drawn plus sign in a circle.
        CircledPlus = SC_MARK_CIRCLEPLUS,

        //! A drawn plus sign in a connected box.
        CircledPlusConnected = SC_MARK_CIRCLEPLUSCONNECTED,

        //! A drawn minus sign in a circle.
        CircledMinus = SC_MARK_CIRCLEMINUS,

        //! A drawn minus sign in a connected circle.
        CircledMinusConnected = SC_MARK_CIRCLEMINUSCONNECTED,

        //! No symbol is drawn but the line is drawn with the same background
        //! color as the marker's.
        Background = SC_MARK_BACKGROUND,

        //! Three drawn dots.
        ThreeDots = SC_MARK_DOTDOTDOT,

        //! Three drawn arrows pointing right.
        ThreeRightArrows = SC_MARK_ARROWS,

        //! A full rectangle (ie. the margin background) using the marker's
        //! background color.
        FullRectangle = SC_MARK_FULLRECT,

        //! A left rectangle (ie. the left part of the margin background) using
        //! the marker's background color.
        LeftRectangle = SC_MARK_LEFTRECT,

        //! No symbol is drawn but the line is drawn underlined using the
        //! marker's background color.
        Underline = SC_MARK_UNDERLINE
    };

    //! This enum defines the different whitespace visibility modes.  When
    //! whitespace is visible spaces are displayed as small centred dots and
    //! tabs are displayed as light arrows pointing to the right.
    enum WhitespaceVisibility {
        //! Whitespace is invisible.
        WsInvisible = SCWS_INVISIBLE,

        //! Whitespace is always visible.
        WsVisible = SCWS_VISIBLEALWAYS,

        //! Whitespace is visible after the whitespace used for indentation.
        WsVisibleAfterIndent = SCWS_VISIBLEAFTERINDENT
    };

    //! This enum defines the different line wrap modes.
    enum WrapMode {
        //! Lines are not wrapped.
        WrapNone = SC_WRAP_NONE,

        //! Lines are wrapped at word boundaries.
        WrapWord = SC_WRAP_WORD,

        //! Lines are wrapped at character boundaries.
        WrapCharacter = SC_WRAP_CHAR
    };

    //! This enum defines the different line wrap visual flags.
    enum WrapVisualFlag {
        //! No wrap flag is displayed.
        WrapFlagNone,

        //! A wrap flag is displayed by the text.
        WrapFlagByText,

        //! A wrap flag is displayed by the border.
        WrapFlagByBorder
    };

    //! This enum defines the different line wrap indentation modes.
    enum WrapIndentMode {
        //! Wrapped sub-lines are indented by the amount set by
        //! setWrapVisualFlags().
        WrapIndentFixed = SC_WRAPINDENT_FIXED,

        //! Wrapped sub-lines are indented by the same amount as the first
        //! sub-line.
        WrapIndentSame = SC_WRAPINDENT_SAME,

        //! Wrapped sub-lines are indented by the same amount as the first
        //! sub-line plus one more level of indentation.
        WrapIndentIndented = SC_WRAPINDENT_INDENT
    };

    //! Construct an empty QsciScintilla with parent \a parent.
    QsciScintilla(QWidget *parent = 0);

    //! Destroys the QsciScintilla instance.
    virtual ~QsciScintilla();

    //! Returns the API context, which is a list of words, before the position
    //! \a pos in the document.  The context can be used by auto-completion and
    //! call tips to help to identify which API call the user is referring to.
    //! In the default implementation the current lexer determines what
    //! characters make up a word, and what characters determine the boundaries
    //! of words (ie. the start characters).  If there is no current lexer then
    //! the context will consist of a single word.  On return \a context_start
    //! will contain the position in the document of the start of the context
    //! and \a last_word_start will contain the position in the document of the
    //! start of the last word of the context.
    virtual QStringList apiContext(int pos, int &context_start,
            int &last_word_start);

    //! Annotate the line \a line with the text \a text using the style number
    //! \a style.
    void annotate(int line, const QString &text, int style);

    //! Annotate the line \a line with the text \a text using the style \a
    //! style.
    void annotate(int line, const QString &text, const QsciStyle &style);

    //! Annotate the line \a line with the styled text \a text.
    void annotate(int line, const QsciStyledText &text);

    //! Annotate the line \a line with the list of styled text \a text.
    void annotate(int line, const QList<QsciStyledText> &text);

    //! Returns the annotation on line \a line, if any.
    QString annotation(int line) const;

    //! Returns the display style for annotations.
    //!
    //! \sa setAnnotationDisplay()
    AnnotationDisplay annotationDisplay() const;

    //! The annotations on line \a line are removed.  If \a line is negative
    //! then all annotations are removed.
    void clearAnnotations(int line = -1);

    //! Returns true if auto-completion lists are case sensitive.
    //!
    //! \sa setAutoCompletionCaseSensitivity()
    bool autoCompletionCaseSensitivity() const;

    //! Returns true if auto-completion fill-up characters are enabled.
    //!
    //! \sa setAutoCompletionFillups(), setAutoCompletionFillupsEnabled()
    bool autoCompletionFillupsEnabled() const;

    //! Returns true if the rest of the word to the right of the current cursor
    //! is removed when an item from an auto-completion list is selected.
    //!
    //! \sa setAutoCompletionReplaceWord()
    bool autoCompletionReplaceWord() const;

    //! Returns true if the only item in an auto-completion list with a single
    //! entry is automatically used and the list not displayed.  Note that this
    //! is deprecated and autoCompletionUseSingle() should be used instead.
    //!
    //! \sa setAutoCompletionShowSingle()
    bool autoCompletionShowSingle() const;

    //! Returns the current source for the auto-completion list when it is
    //! being displayed automatically as the user types.
    //!
    //! \sa setAutoCompletionSource()
    AutoCompletionSource autoCompletionSource() const {return acSource;}

    //! Returns the current threshold for the automatic display of the
    //! auto-completion list as the user types.
    //!
    //! \sa setAutoCompletionThreshold()
    int autoCompletionThreshold() const {return acThresh;}

    //! Returns the current behavior when an auto-completion list contains a
    //! single entry.
    //!
    //! \sa setAutoCompletionUseSingle()
    AutoCompletionUseSingle autoCompletionUseSingle() const;

    //! Returns true if auto-indentation is enabled.
    //!
    //! \sa setAutoIndent()
    bool autoIndent() const {return autoInd;}

    //! Returns true if the backspace key unindents a line instead of deleting
    //! a character.  The default is false.
    //!
    //! \sa setBackspaceUnindents(), tabIndents(), setTabIndents()
    bool backspaceUnindents() const;

    //! Mark the beginning of a sequence of actions that can be undone by a
    //! single call to undo().
    //!
    //! \sa endUndoAction(), undo()
    void beginUndoAction();

    //! Returns the brace matching mode.
    //!
    //! \sa setBraceMatching()
    BraceMatch braceMatching() const {return braceMode;}

    //! Returns the current call tip style.
    //!
    //! \sa setCallTipsStyle()
    CallTipsStyle callTipsStyle() const {return call_tips_style;}

    //! Returns the maximum number of call tips that are displayed.
    //!
    //! \sa setCallTipsVisible()
    int callTipsVisible() const {return maxCallTips;}

    //! Cancel any current auto-completion or user defined list.
    void cancelList();

    //! Returns true if the current language lexer is case sensitive.  If there
    //! is no current lexer then true is returned.
    bool caseSensitive() const;

    //! Clear all current folds, i.e. ensure that all lines are displayed
    //! unfolded.
    //!
    //! \sa setFolding()
    void clearFolds();

    //! Clears the range of text with indicator \a indicatorNumber starting at
    //! position \a indexFrom in line \a lineFrom and finishing at position
    //! \a indexTo in line \a lineTo.
    //!
    //! \sa fillIndicatorRange()
    void clearIndicatorRange(int lineFrom, int indexFrom, int lineTo,
            int indexTo, int indicatorNumber);

    //! Clear all registered images.
    //!
    //! \sa registerImage()
    void clearRegisteredImages();

    //! Returns the widget's text (ie. foreground) colour.
    //!
    //! \sa setColor()
    QColor color() const;

    //! Returns a list of the line numbers that have contracted folds.  This is
    //! typically used to save the fold state of a document.
    //!
    //! \sa setContractedFolds()
    QList<int> contractedFolds() const;

    //! All the lines of the text have their end-of-lines converted to mode
    //! \a mode.
    //!
    //! \sa eolMode(), setEolMode()
    void convertEols(EolMode mode);

    //! Returns the attached document.
    //!
    //! \sa setDocument()
    QsciDocument document() const {return doc;}

    //! Mark the end of a sequence of actions that can be undone by a single
    //! call to undo().
    //!
    //! \sa beginUndoAction(), undo()
    void endUndoAction();

    //! Returns the color of the marker used to show that a line has exceeded
    //! the length set by setEdgeColumn().
    //!
    //! \sa setEdgeColor(), \sa setEdgeColumn
    QColor edgeColor() const;

    //! Returns the number of the column after which lines are considered to be
    //! long.
    //!
    //! \sa setEdgeColumn()
    int edgeColumn() const;

    //! Returns the edge mode which determines how long lines are marked.
    //!
    //! \sa setEdgeMode()
    EdgeMode edgeMode() const;

    //! Set the default font.  This has no effect if a language lexer has been
    //! set.
    void setFont(const QFont &f);

    //! Returns the end-of-line mode.
    //!
    //! \sa setEolMode()
    EolMode eolMode() const;

    //! Returns the visibility of end-of-lines.
    //!
    //! \sa setEolVisibility()
    bool eolVisibility() const;

    //! Returns the extra space added to the height of a line above the
    //! baseline of the text.
    //!
    //! \sa setExtraAscent(), extraDescent()
    int extraAscent() const;

    //! Returns the extra space added to the height of a line below the
    //! baseline of the text.
    //!
    //! \sa setExtraDescent(), extraAscent()
    int extraDescent() const;

    //! Fills the range of text with indicator \a indicatorNumber starting at
    //! position \a indexFrom in line \a lineFrom and finishing at position
    //! \a indexTo in line \a lineTo.
    //!
    //! \sa clearIndicatorRange()
    void fillIndicatorRange(int lineFrom, int indexFrom, int lineTo,
            int indexTo, int indicatorNumber);

    //! Find the next occurrence of the string \a expr and return true if
    //! \a expr was found, otherwise returns false.  If \a expr is found it
    //! becomes the current selection.
    //!
    //! If \a re is true then \a expr is interpreted as a regular expression
    //! rather than a simple string.
    //!
    //! If \a cs is true then the search is case sensitive.
    //!
    //! If \a wo is true then the search looks for whole word matches only,
    //! otherwise it searches for any matching text.
    //!
    //! If \a wrap is true then the search wraps around the end of the text.
    //!
    //! If \a forward is true (the default) then the search is forward from the
    //! starting position to the end of the text, otherwise it is backwards to
    //! the beginning of the text. 
    //!
    //! If either \a line or \a index are negative (the default) then the
    //! search begins from the current cursor position.  Otherwise the search
    //! begins at position \a index of line \a line.
    //!
    //! If \a show is true (the default) then any text found is made visible
    //! (ie. it is unfolded).
    //!
    //! \sa findNext(), replace()
    virtual bool findFirst(const QString &expr, bool re, bool cs, bool wo,
            bool wrap, bool forward = true, int line = -1, int index = -1,
            bool show = true);

    //! Find the next occurence of the string found using findFirst().
    //!
    //! \sa findFirst(), replace()
    virtual bool findNext();

    //! Returns the number of the first visible line.
    //!
    //! \sa setFirstVisibleLine()
    int firstVisibleLine() const;

    //! Returns the current folding style.
    //!
    //! \sa setFolding()
    FoldStyle folding() const {return fold;}

    //! Sets \a *line and \a *index to the line and index of the cursor.
    //!
    //! \sa setCursorPosition()
    void getCursorPosition(int *line, int *index) const;

    //! If there is a selection, \a *lineFrom is set to the line number in
    //! which the selection begins and \a *lineTo is set to the line number in
    //! which the selection ends.  (They could be the same.)  \a *indexFrom is
    //! set to the index at which the selection begins within \a *lineFrom, and
    //! \a *indexTo is set to the index at which the selection ends within
    //! \a *lineTo.  If there is no selection, \a *lineFrom, \a *indexFrom,
    //! \a *lineTo and \a *indexTo are all set to -1. 
    //!
    //! \sa setSelection()
    void getSelection(int *lineFrom, int *indexFrom, int *lineTo,
            int *indexTo) const;

    //! Returns true if some text is selected.
    //!
    //! \sa selectedText()
    bool hasSelectedText() const {return selText;}

    //! Returns the number of characters that line \a line is indented by.
    //!
    //! \sa setIndentation()
    int indentation(int line) const;

    //! Returns true if the display of indentation guides is enabled.
    //!
    //! \sa setIndentationGuides()
    bool indentationGuides() const;

    //! Returns true if indentations are created using tabs and spaces, rather
    //! than just spaces.  The default is true.
    //!
    //! \sa setIndentationsUseTabs()
    bool indentationsUseTabs() const;

    //! Returns the indentation width in characters.  The default is 0 which
    //! means that the value returned by tabWidth() is actually used.
    //!
    //! \sa setIndentationWidth(), tabWidth()
    int indentationWidth() const;

    //! Define a type of indicator using the style \a style with the indicator
    //! number \a indicatorNumber.  If \a indicatorNumber is -1 then the
    //! indicator number is automatically allocated.  The indicator number is
    //! returned or -1 if too many types of indicator have been defined.
    //!
    //! Indicators are used to display additional information over the top of
    //! styling.  They can be used to show, for example, syntax errors,
    //! deprecated names and bad indentation by drawing lines under text or
    //! boxes around text.
    //!
    //! There may be up to 32 types of indicator defined at a time.  The first
    //! 8 are normally used by lexers.  By default indicator number 0 is a
    //! dark green SquiggleIndicator, 1 is a blue TTIndicator, and 2 is a red
    //! PlainIndicator.
    int indicatorDefine(IndicatorStyle style, int indicatorNumber = -1);

    //! Returns true if the indicator \a indicatorNumber is drawn under the
    //! text (i.e. in the background).  The default is false.
    //!
    //! \sa setIndicatorDrawUnder()
    bool indicatorDrawUnder(int indicatorNumber) const;

    //! Returns true if a call tip is currently active.
    bool isCallTipActive() const;

    //! Returns true if an auto-completion or user defined list is currently
    //! active.
    bool isListActive() const;

    //! Returns true if the text has been modified.
    //!
    //! \sa setModified(), modificationChanged()
    bool isModified() const;

    //! Returns true if the text edit is read-only.
    //!
    //! \sa setReadOnly()
    bool isReadOnly() const;

    //! Returns true if there is something that can be redone.
    //!
    //! \sa redo()
    bool isRedoAvailable() const;

    //! Returns true if there is something that can be undone.
    //!
    //! \sa undo()
    bool isUndoAvailable() const;

    //! Returns true if text is interpreted as being UTF8 encoded.  The default
    //! is to interpret the text as Latin1 encoded.
    //!
    //! \sa setUtf8()
    bool isUtf8() const;

    //! Returns true if character \a ch is a valid word character.
    //!
    //! \sa wordCharacters()
    bool isWordCharacter(char ch) const;

    //! Returns the line which is at \a point pixel coordinates or -1 if there
    //! is no line at that point.
    int lineAt(const QPoint &point) const;

    //! QScintilla uses the combination of a line number and a character index
    //! from the start of that line to specify the position of a character
    //! within the text.  The underlying Scintilla instead uses a byte index
    //! from the start of the text.  This will convert the \a position byte
    //! index to the \a *line line number and \a *index character index.
    //!
    //! \sa positionFromLineIndex()
    void lineIndexFromPosition(int position, int *line, int *index) const;

    //! Returns the length of line \a line int bytes or -1 if there is no such
    //! line.  In order to get the length in characters use text(line).length().
    int lineLength(int line) const;

    //! Returns the number of lines of text.
    int lines() const;

    //! Returns the length of the text edit's text in bytes.  In order to get
    //! the length in characters use text().length().
    int length() const;

    //! Returns the current language lexer used to style text.  If it is 0 then
    //! syntax styling is disabled.
    //!
    //! \sa setLexer()
    QsciLexer *lexer() const;

    //! Returns true if line numbers are enabled for margin \a margin.
    //!
    //! \sa setMarginLineNumbers(), marginType(), SCI_GETMARGINTYPEN
    bool marginLineNumbers(int margin) const;

    //! Returns the marker mask of margin \a margin.
    //!
    //! \sa setMarginMask(), QsciMarker, SCI_GETMARGINMASKN
    int marginMarkerMask(int margin) const;

    //! Returns true if margin \a margin is sensitive to mouse clicks.
    //!
    //! \sa setMarginSensitivity(), marginClicked(), SCI_GETMARGINTYPEN
    bool marginSensitivity(int margin) const;

    //! Returns the type of margin \a margin.
    //!
    //! \sa setMarginType(), SCI_GETMARGINTYPEN
    MarginType marginType(int margin) const;

    //! Returns the width in pixels of margin \a margin.
    //!
    //! \sa setMarginWidth(), SCI_GETMARGINWIDTHN
    int marginWidth(int margin) const;

    //! Define a type of marker using the symbol \a sym with the marker number
    //! \a markerNumber.  If \a markerNumber is -1 then the marker number is
    //! automatically allocated.  The marker number is returned or -1 if too
    //! many types of marker have been defined.
    //!
    //! Markers are small geometric symbols and characters used, for example,
    //! to indicate the current line or, in debuggers, to indicate breakpoints.
    //! If a margin has a width of 0 then its markers are not drawn, but their
    //! background colours affect the background colour of the corresponding
    //! line of text.
    //!
    //! There may be up to 32 types of marker defined at a time and each line
    //! of text has a set of marker instances associated with it.  Markers are
    //! drawn according to their numerical identifier.  Markers try to move
    //! with their text by tracking where the start of their line moves to.
    //! For example, when a line is deleted its markers are added to previous
    //! line's markers.
    //!
    //! Each marker type is identified by a marker number.  Each instance of a
    //! marker is identified by a marker handle.
    int markerDefine(MarkerSymbol sym, int markerNumber = -1);

    //! Define a marker using the character \a ch with the marker number
    //! \a markerNumber.  If \a markerNumber is -1 then the marker number is
    //! automatically allocated.  The marker number is returned or -1 if too
    //! many markers have been defined.
    int markerDefine(char ch, int markerNumber = -1);

    //! Define a marker using a copy of the pixmap \a pm with the marker number
    //! \a markerNumber.  If \a markerNumber is -1 then the marker number is
    //! automatically allocated.  The marker number is returned or -1 if too
    //! many markers have been defined.
    int markerDefine(const QPixmap &pm, int markerNumber = -1);

    //! Add an instance of marker number \a markerNumber to line number
    //! \a linenr.  A handle for the marker is returned which can be used to
    //! track the marker's position, or -1 if the \a markerNumber was invalid.
    //!
    //! \sa markerDelete(), markerDeleteAll(), markerDeleteHandle()
    int markerAdd(int linenr, int markerNumber);

    //! Returns the 32 bit mask of marker numbers at line number \a linenr.
    //!
    //! \sa markerAdd()
    unsigned markersAtLine(int linenr) const;

    //! Delete all markers with the marker number \a markerNumber in the line
    //! \a linenr.  If \a markerNumber is -1 then delete all markers from line
    //! \a linenr.
    //!
    //! \sa markerAdd(), markerDeleteAll(), markerDeleteHandle()
    void markerDelete(int linenr, int markerNumber = -1);

    //! Delete the all markers with the marker number \a markerNumber.  If
    //! \a markerNumber is -1 then delete all markers.
    //!
    //! \sa markerAdd(), markerDelete(), markerDeleteHandle()
    void markerDeleteAll(int markerNumber = -1);

    //! Delete the the marker instance with the marker handle \a mhandle.
    //!
    //! \sa markerAdd(), markerDelete(), markerDeleteAll()
    void markerDeleteHandle(int mhandle);

    //! Return the line number that contains the marker instance with the
    //! marker handle \a mhandle.
    int markerLine(int mhandle) const;

    //! Return the number of the next line to contain at least one marker from
    //! a 32 bit mask of markers.  \a linenr is the line number to start the
    //! search from.  \a mask is the mask of markers to search for.
    //!
    //! \sa markerFindPrevious()
    int markerFindNext(int linenr, unsigned mask) const;

    //! Return the number of the previous line to contain at least one marker
    //! from a 32 bit mask of markers.  \a linenr is the line number to start
    //! the search from.  \a mask is the mask of markers to search for.
    //!
    //! \sa markerFindNext()
    int markerFindPrevious(int linenr, unsigned mask) const;

    //! Returns the widget's paper (ie. background) colour.
    //!
    //! \sa setPaper()
    QColor paper() const;

    //! QScintilla uses the combination of a line number and a character index
    //! from the start of that line to specify the position of a character
    //! within the text.  The underlying Scintilla instead uses a byte index
    //! from the start of the text.  This will return the byte index
    //! corresponding to the \a line line number and \a index character index.
    //!
    //! \sa lineIndexFromPosition()
    int positionFromLineIndex(int line, int index) const;

    //! Reads the current document from the \a io device and returns true if
    //! there was no error.
    //!
    //! \sa write()
    bool read(QIODevice *io);

    //! Recolours the document between the \a start and \a end positions.
    //! \a start defaults to the start of the document and \a end defaults to
    //! the end of the document.
    virtual void recolor(int start = 0, int end = -1);

    //! Register an image \a pm with ID \a id.  Registered images can be
    //! displayed in auto-completion lists.
    //!
    //! \sa clearRegisteredImages(), QsciLexer::apiLoad()
    void registerImage(int id, const QPixmap &pm);

    //! Replace the current selection, set by a previous call to findFirst() or
    //! findNext(), with \a replaceStr.
    //!
    //! \sa findFirst(), findNext()
    virtual void replace(const QString &replaceStr);

    //! Reset the fold margin colours to their defaults.
    //!
    //! \sa setFoldMarginColors()
    void resetFoldMarginColors();

    //! The fold margin may be drawn as a one pixel sized checkerboard pattern
    //! of two colours, \a fore and \a back.
    //!
    //! \sa resetFoldMarginColors()
    void setFoldMarginColors(const QColor &fore, const QColor &back);

    //! Set the display style for annotations.  The default is
    //! AnnotationStandard.
    //!
    //! \sa annotationDisplay()
    void setAnnotationDisplay(AnnotationDisplay display);

    //! Enable the use of fill-up characters, either those explicitly set or
    //! those set by a lexer.  By default, fill-up characters are disabled.
    //!
    //! \sa autoCompletionFillupsEnabled(), setAutoCompletionFillups()
    void setAutoCompletionFillupsEnabled(bool enabled);

    //! A fill-up character is one that, when entered while an auto-completion
    //! list is being displayed, causes the currently selected item from the
    //! list to be added to the text followed by the fill-up character.
    //! \a fillups is the set of fill-up characters.  If a language lexer has
    //! been set then this is ignored and the lexer defines the fill-up
    //! characters.  The default is that no fill-up characters are set.
    //!
    //! \sa autoCompletionFillupsEnabled(), setAutoCompletionFillupsEnabled()
    void setAutoCompletionFillups(const char *fillups);

    //! A word separator is a sequence of characters that, when entered, causes
    //! the auto-completion list to be displayed.  If a language lexer has been
    //! set then this is ignored and the lexer defines the word separators.
    //! The default is that no word separators are set.
    //!
    //! \sa setAutoCompletionThreshold()
    void setAutoCompletionWordSeparators(const QStringList &separators);

    //! Set the background colour of call tips to \a col.  The default is
    //! white.
    void setCallTipsBackgroundColor(const QColor &col);

    //! Set the foreground colour of call tips to \a col.  The default is
    //! mid-gray.
    void setCallTipsForegroundColor(const QColor &col);

    //! Set the highlighted colour of call tip text to \a col.  The default is
    //! dark blue.
    void setCallTipsHighlightColor(const QColor &col);

    //! Set the current call tip style.  The default is CallTipsNoContext.
    //!
    //! \sa callTipsStyle()
    void setCallTipsStyle(CallTipsStyle style);

    //! Set the maximum number of call tips that are displayed to \a nr.  If
    //! the maximum number is 0 then all applicable call tips are displayed.
    //! If the maximum number is -1 then one call tip will be displayed with up
    //! and down arrows that allow the use to scroll through the full list.
    //! The default is -1.
    //!
    //! \sa callTipsVisible()
    void setCallTipsVisible(int nr);

    //! Sets each line in the \a folds list of line numbers to be a contracted
    //! fold.  This is typically used to restore the fold state of a document.
    //!
    //! \sa contractedFolds()
    void setContractedFolds(const QList<int> &folds);

    //! Attach the document \a document, replacing the currently attached
    //! document.
    //!
    //! \sa document()
    void setDocument(const QsciDocument &document);

    //! Set the color of the marker used to show that a line has exceeded the
    //! length set by setEdgeColumn().
    //!
    //! \sa edgeColor(), \sa setEdgeColumn
    void setEdgeColor(const QColor &col);

    //! Set the number of the column after which lines are considered to be
    //! long.
    //!
    //! \sa edgeColumn()
    void setEdgeColumn(int colnr);

    //! Set the edge mode which determines how long lines are marked.
    //!
    //! \sa edgeMode()
    void setEdgeMode(EdgeMode mode);

    //! Set the number of the first visible line to \a linenr.
    //!
    //! \sa firstVisibleLine()
    void setFirstVisibleLine(int linenr);

    //! Enables or disables, according to \a under, if the indicator
    //! \a indicatorNumber is drawn under or over the text (i.e. in the
    //! background or foreground).  If \a indicatorNumber is -1 then the state
    //! of all indicators is set.
    //!
    //! \sa indicatorDrawUnder()
    void setIndicatorDrawUnder(bool under, int indicatorNumber = -1);

    //! Set the foreground colour of indicator \a indicatorNumber to \a col.
    //! If \a indicatorNumber is -1 then the colour of all indicators is set.
    void setIndicatorForegroundColor(const QColor &col, int indicatorNumber = -1);

    //! Set the margin text of line \a line with the text \a text using the
    //! style number \a style.
    void setMarginText(int line, const QString &text, int style);

    //! Set the margin text of line \a line with the text \a text using the
    //! style \a style.
    void setMarginText(int line, const QString &text, const QsciStyle &style);

    //! Set the margin text of line \a line with the styled text \a text.
    void setMarginText(int line, const QsciStyledText &text);

    //! Set the margin text of line \a line with the list of styled text \a
    //! text.
    void setMarginText(int line, const QList<QsciStyledText> &text);

    //! Set the type of margin \a margin to type \a type.
    //!
    //! \sa marginType(), SCI_SETMARGINTYPEN
    void setMarginType(int margin, MarginType type);

    //! The margin text on line \a line is removed.  If \a line is negative
    //! then all margin text is removed.
    void clearMarginText(int line = -1);

    //! Set the background colour, including the alpha component, of marker
    //! \a markerNumber to \a col.  If \a markerNumber is -1 then the colour of
    //! all markers is set.  The default is white.
    //!
    //! \sa setMarkerForegroundColor()
    void setMarkerBackgroundColor(const QColor &col, int markerNumber = -1);

    //! Set the foreground colour of marker \a markerNumber to \a col.  If
    //! \a markerNumber is -1 then the colour of all markers is set.  The
    //! default is black.
    //!
    //! \sa setMarkerBackgroundColor()
    void setMarkerForegroundColor(const QColor &col, int markerNumber = -1);

    //! Set the background colour used to display matched braces to \a col.
    //! The default is white.
    //!
    //! \sa setMatchedBraceForegroundColor()
    void setMatchedBraceBackgroundColor(const QColor &col);

    //! Set the foreground colour used to display matched braces to \a col.
    //! The default is red.
    //!
    //! \sa setMatchedBraceBackgroundColor()
    void setMatchedBraceForegroundColor(const QColor &col);

    //! Set the background colour used to display unmatched braces to \a col.
    //! The default is white.
    //!
    //! \sa setUnmatchedBraceForegroundColor()
    void setUnmatchedBraceBackgroundColor(const QColor &col);

    //! Set the foreground colour used to display unmatched braces to \a col.
    //! The default is blue.
    //!
    //! \sa setUnmatchedBraceBackgroundColor()
    void setUnmatchedBraceForegroundColor(const QColor &col);

    //! Set the visual flags displayed when a line is wrapped.  \a endFlag
    //! determines if and where the flag at the end of a line is displayed.
    //! \a startFlag determines if and where the flag at the start of a line is
    //! displayed.  \a indent is the number of characters a wrapped line is
    //! indented by.  By default no visual flags are displayed.
    void setWrapVisualFlags(WrapVisualFlag endFlag,
            WrapVisualFlag startFlag = WrapFlagNone, int indent = 0);

    //! Returns the selected text or an empty string if there is no currently
    //! selected text.
    //!
    //! \sa hasSelectedText()
    QString selectedText() const;

    //! Returns whether or not the selection is drawn up to the right hand
    //! border.
    //!
    //! \sa setSelectionToEol()
    bool selectionToEol() const;

    //! Sets whether or not the selection is drawn up to the right hand border.
    //! \a filled is set if the selection is drawn to the border.
    //!
    //! \sa selectionToEol()
    void setSelectionToEol(bool filled);

    //! Sets the extra space added to the height of a line above the baseline
    //! of the text to \a extra.
    //!
    //! \sa extraAscent(), setExtraDescent()
    void setExtraAscent(int extra);

    //! Sets the extra space added to the height of a line below the baseline
    //! of the text to \a extra.
    //!
    //! \sa extraDescent(), setExtraAscent()
    void setExtraDescent(int extra);

    //! Sets the background colour of visible whitespace to \a col.  If \a col
    //! is an invalid color (the default) then the color specified by the
    //! current lexer is used.
    void setWhitespaceBackgroundColor(const QColor &col);

    //! Sets the foreground colour of visible whitespace to \a col.  If \a col
    //! is an invalid color (the default) then the color specified by the
    //! current lexer is used.
    void setWhitespaceForegroundColor(const QColor &col);

    //! Sets the size of the dots used to represent visible whitespace.
    //!
    //! \sa whitespaceSize()
    void setWhitespaceSize(int size);

    //! Sets the line wrap indentation mode to \a mode.  The default is
    //! WrapIndentFixed.
    //!
    //! \sa wrapIndentMode()
    void setWrapIndentMode(WrapIndentMode mode);

    //! Displays a user defined list which can be interacted with like an
    //! auto-completion list.  \a id is an identifier for the list which is
    //! passed as an argument to the userListActivated() signal and must be at
    //! least 1.  \a list is the text with which the list is populated.
    //!
    //! \sa cancelList(), isListActive(), userListActivated()
    void showUserList(int id, const QStringList &list);

    //! The standard command set is returned.
    QsciCommandSet *standardCommands() const {return stdCmds;}

    //! Returns true if the tab key indents a line instead of inserting a tab
    //! character.  The default is true.
    //!
    //! \sa setTabIndents(), backspaceUnindents(), setBackspaceUnindents()
    bool tabIndents() const;

    //! Returns the tab width in characters.  The default is 8.
    //!
    //! \sa setTabWidth()
    int tabWidth() const;

    //! Returns the text of the current document.
    //!
    //! \sa setText()
    QString text() const;

    //! \overload
    //!
    //! Returns the text of line \a line.
    //!
    //! \sa setText()
    QString text(int line) const;

    //! Returns the height in pixels of the text in line number \a linenr.
    int textHeight(int linenr) const;

    //! Returns the size of the dots used to represent visible whitespace.
    //!
    //! \sa setWhitespaceSize()
    int whitespaceSize() const;

    //! Returns the visibility of whitespace.
    //!
    //! \sa setWhitespaceVisibility()
    WhitespaceVisibility whitespaceVisibility() const;

    //! Returns the word at the \a point pixel coordinates.
    QString wordAtPoint(const QPoint &point) const;

    //! Returns the set of valid word character as defined by the current
    //! language lexer.  If there is no current lexer then the set contains an
    //! an underscore, numbers and all upper and lower case alphabetic
    //! characters.
    //!
    //! \sa isWordCharacter()
    const char *wordCharacters() const;

    //! Returns the line wrap mode.
    //!
    //! \sa setWrapMode()
    WrapMode wrapMode() const;

    //! Returns the line wrap indentation mode.
    //!
    //! \sa setWrapIndentMode()
    WrapIndentMode wrapIndentMode() const;

    //! Writes the current document to the \a io device and returns true if
    //! there was no error.
    //!
    //! \sa read()
    bool write(QIODevice *io) const;

public slots:
    //! Appends the text \a text to the end of the text edit.  Note that the
    //! undo/redo history is cleared by this function.
    virtual void append(const QString &text);

    //! Display an auto-completion list based on any installed APIs, the
    //! current contents of the document and the characters immediately to the
    //! left of the cursor.
    //!
    //! \sa autoCompleteFromAPIs(), autoCompleteFromDocument()
    virtual void autoCompleteFromAll();

    //! Display an auto-completion list based on any installed APIs and the
    //! characters immediately to the left of the cursor.
    //!
    //! \sa autoCompleteFromAll(), autoCompleteFromDocument(),
    //! setAutoCompletionAPIs()
    virtual void autoCompleteFromAPIs();

    //! Display an auto-completion list based on the current contents of the
    //! document and the characters immediately to the left of the cursor.
    //!
    //! \sa autoCompleteFromAll(), autoCompleteFromAPIs()
    virtual void autoCompleteFromDocument();

    //! Display a call tip based on the the characters immediately to the left
    //! of the cursor.
    virtual void callTip();

    //! Deletes all the text in the text edit.
    virtual void clear();

    //! Copies any selected text to the clipboard.
    //!
    //! \sa copyAvailable(), cut(), paste()
    virtual void copy();

    //! Copies any selected text to the clipboard and then deletes the text.
    //!
    //! \sa copy(), paste()
    virtual void cut();

    //! Ensures that the cursor is visible.
    virtual void ensureCursorVisible();

    //! Ensures that the line number \a line is visible.
    virtual void ensureLineVisible(int line);

    //! If any lines are currently folded then they are all unfolded.
    //! Otherwise all lines are folded.  This has the same effect as clicking
    //! in the fold margin with the shift and control keys pressed.  If
    //! \a children is not set (the default) then only the top level fold
    //! points are affected, otherwise the state of all fold points are
    //! changed.
    virtual void foldAll(bool children = false);

    //! If the line \a line is folded then it is unfolded.  Otherwise it is
    //! folded.  This has the same effect as clicking in the fold margin.
    virtual void foldLine(int line);

    //! Increases the indentation of line \a line by an indentation width.
    //!
    //! \sa unindent()
    virtual void indent(int line);

    //! Insert the text \a text at the current position.
    virtual void insert(const QString &text);

    //! Insert the text \a text in the line \a line at the position
    //! \a index.
    virtual void insertAt(const QString &text, int line, int index);

    //! If the cursor is either side of a brace character then move it to the
    //! position of the corresponding brace.
    virtual void moveToMatchingBrace();

    //! Pastes any text from the clipboard into the text edit at the current
    //! cursor position.
    //!
    //! \sa copy(), cut()
    virtual void paste();

    //! Redo the last change or sequence of changes.
    //!
    //! \sa isRedoAvailable()
    virtual void redo();

    //! Removes any selected text.
    //!
    //! \sa replaceSelectedText()
    virtual void removeSelectedText();

    //! Replaces any selected text with \a text.
    //!
    //! \sa removeSelectedText()
    virtual void replaceSelectedText(const QString &text);

    //! Resets the background colour of selected text to the default.
    //!
    //! \sa setSelectionBackgroundColor(), resetSelectionForegroundColor()
    virtual void resetSelectionBackgroundColor();

    //! Resets the foreground colour of selected text to the default.
    //!
    //! \sa setSelectionForegroundColor(), resetSelectionBackgroundColor()
    virtual void resetSelectionForegroundColor();

    //! If \a select is true (the default) then all the text is selected.  If
    //! \a select is false then any currently selected text is deselected.
    virtual void selectAll(bool select = true);

    //! If the cursor is either side of a brace character then move it to the
    //! position of the corresponding brace and select the text between the
    //! braces.
    virtual void selectToMatchingBrace();

    //! If \a cs is true then auto-completion lists are case sensitive.  The
    //! default is true.  Note that setting a lexer may change the case
    //! sensitivity.
    //!
    //! \sa autoCompletionCaseSensitivity()
    virtual void setAutoCompletionCaseSensitivity(bool cs);

    //! If \a replace is true then when an item from an auto-completion list is
    //! selected, the rest of the word to the right of the current cursor is
    //! removed.  The default is false.
    //!
    //! \sa autoCompletionReplaceWord()
    virtual void setAutoCompletionReplaceWord(bool replace);

    //! If \a single is true then when there is only a single entry in an
    //! auto-completion list it is automatically used and the list is not
    //! displayed.  This only has an effect when auto-completion is explicitly
    //! requested (using autoCompleteFromAPIs() and autoCompleteFromDocument())
    //! and has no effect when auto-completion is triggered as the user types.
    //! The default is false.  Note that this is deprecated and
    //! setAutoCompletionUseSingle() should be used instead.
    //!
    //! \sa autoCompletionShowSingle()
    virtual void setAutoCompletionShowSingle(bool single);

    //! Sets the source for the auto-completion list when it is being displayed
    //! automatically as the user types to \a source.  The default is AcsNone,
    //! ie. it is disabled.
    //!
    //! \sa autoCompletionSource()
    virtual void setAutoCompletionSource(AutoCompletionSource source);

    //! Sets the threshold for the automatic display of the auto-completion
    //! list as the user types to \a thresh.  The threshold is the number of
    //! characters that the user must type before the list is displayed.  If
    //! the threshold is less than or equal to 0 then the list is disabled.
    //! The default is -1.
    //!
    //! \sa autoCompletionThreshold(), setAutoCompletionWordSeparators()
    virtual void setAutoCompletionThreshold(int thresh);

    //! Sets the behavior of the auto-completion list when it has a single
    //! entry.  The default is AcusNever.
    //!
    //! \sa autoCompletionUseSingle()
    virtual void setAutoCompletionUseSingle(AutoCompletionUseSingle single);

    //! If \a autoindent is true then auto-indentation is enabled.  The default
    //! is false.
    //!
    //! \sa autoIndent()
    virtual void setAutoIndent(bool autoindent);

    //! Sets the brace matching mode to \a bm.  The default is NoBraceMatching.
    //!
    //! \sa braceMatching()
    virtual void setBraceMatching(BraceMatch bm);

    //! If \a deindent is true then the backspace key will unindent a line
    //! rather then delete a character.
    //!
    //! \sa backspaceUnindents(), tabIndents(), setTabIndents()
    virtual void setBackspaceUnindents(bool unindent);

    //! Sets the foreground colour of the caret to \a col.
    virtual void setCaretForegroundColor(const QColor &col);

    //! Sets the background colour, including the alpha component, of the line
    //! containing the caret to \a col.
    //!
    //! \sa setCaretLineVisible()
    virtual void setCaretLineBackgroundColor(const QColor &col);

    //! Enables or disables, according to \a enable, the background color of
    //! the line containing the caret.
    //!
    //! \sa setCaretLineBackgroundColor()
    virtual void setCaretLineVisible(bool enable);

    //! Sets the width of the caret to \a width pixels.  A \a width of 0 makes
    //! the caret invisible.
    virtual void setCaretWidth(int width);

    //! The widget's text (ie. foreground) colour is set to \a c.  This has no
    //! effect if a language lexer has been set.
    //!
    //! \sa color()
    virtual void setColor(const QColor &c);

    //! Sets the cursor to the line \a line at the position \a index.
    //!
    //! \sa getCursorPosition()
    virtual void setCursorPosition(int line, int index);

    //! Sets the end-of-line mode to \a mode.  The default is the platform's
    //! natural mode.
    //!
    //! \sa eolMode()
    virtual void setEolMode(EolMode mode);

    //! If \a visible is true then end-of-lines are made visible.  The default
    //! is that they are invisible.
    //!
    //! \sa eolVisibility()
    virtual void setEolVisibility(bool visible);

    //! Sets the folding style for margin \a margin to \a fold.  The default
    //! style is NoFoldStyle (ie. folding is disabled) and the default margin
    //! is 2.
    //!
    //! \sa folding()
    virtual void setFolding(FoldStyle fold, int margin = 2);

    //! Sets the indentation of line \a line to \a indentation characters.
    //!
    //! \sa indentation()
    virtual void setIndentation(int line, int indentation);

    //! Enables or disables, according to \a enable, this display of
    //! indentation guides.
    //!
    //! \sa indentationGuides()
    virtual void setIndentationGuides(bool enable);

    //! Set the background colour of indentation guides to \a col.
    //!
    //! \sa setIndentationGuidesForegroundColor()
    virtual void setIndentationGuidesBackgroundColor(const QColor &col);

    //! Set the foreground colour of indentation guides to \a col.
    //!
    //! \sa setIndentationGuidesBackgroundColor()
    virtual void setIndentationGuidesForegroundColor(const QColor &col);

    //! If \a tabs is true then indentations are created using tabs and spaces,
    //! rather than just spaces.
    //!
    //! \sa indentationsUseTabs()
    virtual void setIndentationsUseTabs(bool tabs);

    //! Sets the indentation width to \a width characters.  If \a width is 0
    //! then the value returned by tabWidth() is used.
    //!
    //! \sa indentationWidth(), tabWidth()
    virtual void setIndentationWidth(int width);

    //! Sets the specific language lexer used to style text to \a lex.  If
    //! \a lex is 0 then syntax styling is disabled.
    //!
    //! \sa lexer()
    virtual void setLexer(QsciLexer *lexer = 0);

    //! Set the background colour of all margins to \a col.  The default is a
    //! gray.
    //!
    //! \sa setMarginsForegroundColor()
    virtual void setMarginsBackgroundColor(const QColor &col);

    //! Set the font used in all margins to \a f.
    virtual void setMarginsFont(const QFont &f);

    //! Set the foreground colour of all margins to \a col.  The default is
    //! black.
    //!
    //! \sa setMarginsBackgroundColor()
    virtual void setMarginsForegroundColor(const QColor &col);

    //! Enables or disables, according to \a lnrs, the display of line numbers
    //! in margin \a margin.
    //!
    //! \sa marginLineNumbers(), setMarginType(), SCI_SETMARGINTYPEN
    virtual void setMarginLineNumbers(int margin, bool lnrs);

    //! Sets the marker mask of margin \a margin to \a mask.  Only those
    //! markers whose bit is set in the mask are displayed in the margin.
    //!
    //! \sa marginMarkerMask(), QsciMarker, SCI_SETMARGINMASKN
    virtual void setMarginMarkerMask(int margin, int mask);

    //! Enables or disables, according to \a sens, the sensitivity of margin
    //! \a margin to mouse clicks.  If the user clicks in a sensitive margin
    //! the marginClicked() signal is emitted.
    //!
    //! \sa marginSensitivity(), marginClicked(), SCI_SETMARGINSENSITIVEN
    virtual void setMarginSensitivity(int margin, bool sens);

    //! Sets the width of margin \a margin to \a width pixels.  If the width of
    //! a margin is 0 then it is not displayed.
    //!
    //! \sa marginWidth(), SCI_SETMARGINWIDTHN
    virtual void setMarginWidth(int margin, int width);

    //! Sets the width of margin \a margin so that it is wide enough to display
    //! \a s in the current margin font.
    //!
    //! \sa marginWidth(), SCI_SETMARGINWIDTHN
    virtual void setMarginWidth(int margin, const QString &s);

    //! Sets the modified state of the text edit to \a m.  Note that it is only
    //! possible to clear the modified state (where \a m is false).  Attempts
    //! to set the modified state (where \a m is true) are ignored.
    //!
    //! \sa isModified(), modificationChanged()
    virtual void setModified(bool m);

    //! The widget's paper (ie. background) colour is set to \a c.  This has no
    //! effect if a language lexer has been set.
    //!
    //! \sa paper()
    virtual void setPaper(const QColor &c);

    //! Sets the read-only state of the text edit to \a ro.
    //!
    //! \sa isReadOnly()
    virtual void setReadOnly(bool ro);

    //! Sets the selection which starts at position \a indexFrom in line
    //! \a lineFrom and ends at position \a indexTo in line \a lineTo.  The
    //! cursor is moved to position \a indexTo in \a lineTo.
    //!
    //! \sa getSelection()
    virtual void setSelection(int lineFrom, int indexFrom, int lineTo,
            int indexTo);

    //! Sets the background colour, including the alpha component, of selected
    //! text to \a col.
    //!
    //! \sa resetSelectionBackgroundColor(), setSelectionForegroundColor()
    virtual void setSelectionBackgroundColor(const QColor &col);

    //! Sets the foreground colour of selected text to \a col.
    //!
    //! \sa resetSelectionForegroundColor(), setSelectionBackgroundColor()
    virtual void setSelectionForegroundColor(const QColor &col);

    //! If \a indent is true then the tab key will indent a line rather than
    //! insert a tab character.
    //!
    //! \sa tabIndents(), backspaceUnindents(), setBackspaceUnindents()
    virtual void setTabIndents(bool indent);

    //! Sets the tab width to \a width characters.
    //!
    //! \sa tabWidth()
    virtual void setTabWidth(int width);

    //! Replaces all of the current text with \a text.  Note that the
    //! undo/redo history is cleared by this function.
    //!
    //! \sa text()
    virtual void setText(const QString &text);

    //! Sets the current text encoding.  If \a cp is true then UTF8 is used,
    //! otherwise Latin1 is used.
    //!
    //! \sa isUtf8()
    virtual void setUtf8(bool cp);

    //! Sets the visibility of whitespace to mode \a mode.  The default is that
    //! whitespace is invisible.
    //!
    //! \sa whitespaceVisibility()
    virtual void setWhitespaceVisibility(WhitespaceVisibility mode);

    //! Sets the line wrap mode to \a mode.  The default is that lines are not
    //! wrapped.
    //!
    //! \sa wrapMode()
    virtual void setWrapMode(WrapMode mode);

    //! Undo the last change or sequence of changes.
    //!
    //! Scintilla has multiple level undo and redo.  It will continue to record
    //! undoable actions until memory runs out.  Sequences of typing or
    //! deleting are compressed into single actions to make it easier to undo
    //! and redo at a sensible level of detail.  Sequences of actions can be
    //! combined into actions that are undone as a unit.  These sequences occur
    //! between calls to beginUndoAction() and endUndoAction().  These
    //! sequences can be nested and only the top level sequences are undone as
    //! units. 
    //!
    //! \sa beginUndoAction(), endUndoAction(), isUndoAvailable()
    virtual void undo();

    //! Decreases the indentation of line \a line by an indentation width.
    //!
    //! \sa indent()
    virtual void unindent(int line);

    //! Zooms in on the text by by making the base font size \a range points
    //! larger and recalculating all font sizes.
    //!
    //! \sa zoomOut(), zoomTo()
    virtual void zoomIn(int range);

    //! \overload
    //!
    //! Zooms in on the text by by making the base font size one point larger
    //! and recalculating all font sizes.
    virtual void zoomIn();

    //! Zooms out on the text by by making the base font size \a range points
    //! smaller and recalculating all font sizes.
    //!
    //! \sa zoomIn(), zoomTo()
    virtual void zoomOut(int range);

    //! \overload
    //!
    //! Zooms out on the text by by making the base font size one point larger
    //! and recalculating all font sizes.
    virtual void zoomOut();

    //! Zooms the text by making the base font size \a size points and
    //! recalculating all font sizes.
    //!
    //! \sa zoomIn(), zoomOut()
    virtual void zoomTo(int size);

signals:
    //! This signal is emitted whenever the cursor position changes.  \a line
    //! contains the line number and \a index contains the character index
    //! within the line.
    void cursorPositionChanged(int line, int index);

    //! This signal is emitted whenever text is selected or de-selected.
    //! \a yes is true if text has been selected and false if text has been
    //! deselected.  If \a yes is true then copy() can be used to copy the
    //! selection to the clipboard.  If \a yes is false then copy() does
    //! nothing. 
    //!
    //! \sa copy(), selectionChanged()
    void copyAvailable(bool yes);

    //! This signal is emitted whenever the user clicks on an indicator.  \a
    //! line is the number of the line where the user clicked.  \a index is the
    //! character index within the line.  \a state is the state of the modifier
    //! keys (Qt::ShiftModifier, Qt::ControlModifier and Qt::AltModifer) when
    //! the user clicked.
    //!
    //! \sa indicatorReleased()
    void indicatorClicked(int line, int index, Qt::KeyboardModifiers state);

    //! This signal is emitted whenever the user releases the mouse on an
    //! indicator.  \a line is the number of the line where the user clicked.
    //! \a index is the character index within the line.  \a state is the state
    //! of the modifier keys (Qt::ShiftModifier, Qt::ControlModifier and
    //! Qt::AltModifer) when the user released the mouse.
    //!
    //! \sa indicatorClicked()
    void indicatorReleased(int line, int index, Qt::KeyboardModifiers state);

    //! This signal is emitted whenever the number of lines of text changes.
    void linesChanged();

    //! This signal is emitted whenever the user clicks on a sensitive margin.
    //! \a margin is the margin.  \a line is the number of the line where the
    //! user clicked.  \a state is the state of the modifier keys
    //! (Qt::ShiftModifier, Qt::ControlModifier and Qt::AltModifer) when the
    //! user clicked.
    //!
    //! \sa marginSensitivity(), setMarginSensitivity()
    void marginClicked(int margin, int line, Qt::KeyboardModifiers state);

    //! This signal is emitted whenever the user attempts to modify read-only
    //! text.
    //!
    //! \sa isReadOnly(), setReadOnly()
    void modificationAttempted();

    //! This signal is emitted whenever the modification state of the text
    //! changes.  \a m is true if the text has been modified.
    //!
    //! \sa isModified(), setModified()
    void modificationChanged(bool m);

    //! This signal is emitted whenever the selection changes.
    //!
    //! \sa copyAvailable()
    void selectionChanged();

    //! This signal is emitted whenever the text in the text edit changes.
    void textChanged();

    //! This signal is emitted when an item in a user defined list is activated
    //! (selected).  \a id is the list identifier.  \a string is the text of
    //! the item.
    //!
    //! \sa showUserList()
    void userListActivated(int id, const QString &string);

private slots:
    void handleCallTipClick(int dir);
    void handleCharAdded(int charadded);
    void handleIndicatorClick(int pos, int modifiers);
    void handleIndicatorRelease(int pos, int modifiers);
    void handleMarginClick(int pos, int margin, int modifiers);
    void handleModified(int pos, int mtype, const char *text, int len,
            int added, int line, int foldNow, int foldPrev, int token,
            int annotationLinesAdded);
    void handlePropertyChange(const char *prop, const char *val);
    void handleSavePointReached();
    void handleSavePointLeft();
    void handleSelectionChanged(bool yes);
    void handleAutoCompletionSelection();
    void handleUserListSelection(const char *text, int id);

    void handleStyleColorChange(const QColor &c, int style);
    void handleStyleEolFillChange(bool eolfill, int style);
    void handleStyleFontChange(const QFont &f, int style);
    void handleStylePaperChange(const QColor &c, int style);

    void handleUpdateUI(int updated);

private:
    typedef QByteArray ScintillaString;

    void detachLexer();

    enum IndentState {
        isNone,
        isKeywordStart,
        isBlockStart,
        isBlockEnd
    };

    void maintainIndentation(char ch, long pos);
    void autoIndentation(char ch, long pos);
    void autoIndentLine(long pos, int line, int indent);
    int blockIndent(int line);
    IndentState getIndentState(int line);
    bool rangeIsWhitespace(long spos, long epos);
    int findStyledWord(const char *text, int style, const char *words);

    void checkMarker(int &markerNumber);
    void checkIndicator(int &indicatorNumber);
    static void allocateId(int &id, unsigned &allocated, int min, int max);
    int currentIndent() const;
    int indentWidth() const;
    bool doFind();
    int simpleFind();
    void foldClick(int lineClick, int bstate);
    void foldChanged(int line, int levelNow, int levelPrev);
    void foldExpand(int &line, bool doExpand, bool force = false,
            int visLevels = 0, int level = -1);
    void setFoldMarker(int marknr, int mark = SC_MARK_EMPTY);
    QString convertTextS2Q(const char *s) const;
    ScintillaString convertTextQ2S(const QString &q) const;
    void setLexerStyle(int style);
    void setStylesFont(const QFont &f, int style);

    void braceMatch();
    bool findMatchingBrace(long &brace, long &other, BraceMatch mode);
    long checkBrace(long pos, int brace_style, bool &colonMode);
    void gotoMatchingBrace(bool select);

    void startAutoCompletion(AutoCompletionSource acs, bool checkThresh,
            bool choose_single);

    int adjustedCallTipPosition(int ctshift) const;
    bool getSeparator(int &pos) const;
    QString getWord(int &pos) const;
    char getCharacter(int &pos) const;
    bool isStartChar(char ch) const;

    bool ensureRW();
    void insertAtPos(const QString &text, int pos);
    static int mapModifiers(int modifiers);

    ScintillaString styleText(const QList<QsciStyledText> &styled_text,
            char **styles, int style_offset = 0);

    struct FindState
    {
        FindState() : inProgress(0) {}

        bool inProgress;
        QString expr;
        bool wrap;
        bool forward;
        int flags;
        long startpos;
        long endpos;
        bool show;
    };

    FindState findState;

    unsigned allocatedMarkers;
    unsigned allocatedIndicators;
    int oldPos;
    int ctPos;
    bool selText;
    FoldStyle fold;
    int foldmargin;
    bool autoInd;
    BraceMatch braceMode;
    AutoCompletionSource acSource;
    int acThresh;
    QStringList wseps;
    const char *wchars;
    CallTipsStyle call_tips_style;
    int maxCallTips;
    QStringList ct_entries;
    int ct_cursor;
    QList<int> ct_shifts;
    AutoCompletionUseSingle use_single;
    QPointer<QsciLexer> lex;
    QsciCommandSet *stdCmds;
    QsciDocument doc;
    QColor nl_text_colour;
    QColor nl_paper_colour;
    QByteArray explicit_fillups;
    bool fillups_enabled;

    // The following allow ListBoxQt to distinguish between an auto-completion
    // list and a user list, and to return the full selection of an
    // auto-completion list.
    friend class ListBoxQt;

    QString acSelection;
    bool isAutoCompletionList() const;

    QsciScintilla(const QsciScintilla &);
    QsciScintilla &operator=(const QsciScintilla &);
};

#ifdef __APPLE__
}
#endif

#endif
