QsciLexer Class Reference

#include <qscilexer.h>

Inherits QObject.

Inherited by QsciLexerAVS, QsciLexerBash, QsciLexerBatch, QsciLexerCMake, QsciLexerCoffeeScript, QsciLexerCPP, QsciLexerCSS, QsciLexerCustom, QsciLexerD, QsciLexerDiff, QsciLexerFortran77, QsciLexerHTML, QsciLexerJSON, QsciLexerLua, QsciLexerMakefile, QsciLexerMarkdown, QsciLexerMatlab, QsciLexerPascal, QsciLexerPerl, QsciLexerPO, QsciLexerPostScript, QsciLexerPOV, QsciLexerProperties, QsciLexerPython, QsciLexerRuby, QsciLexerSpice, QsciLexerSQL, QsciLexerTCL, QsciLexerTeX, QsciLexerVerilog, QsciLexerVHDL, and QsciLexerYAML.

Public Slots
virtual void	setAutoIndentStyle (int autoindentstyle)
virtual void	setColor (const QColor &c, int style=-1)
virtual void	setEolFill (bool eoffill, int style=-1)
virtual void	setFont (const QFont &f, int style=-1)
virtual void	setPaper (const QColor &c, int style=-1)

Signals
void	colorChanged (const QColor &c, int style)
void	eolFillChanged (bool eolfilled, int style)
void	fontChanged (const QFont &f, int style)
void	paperChanged (const QColor &c, int style)
void	propertyChanged (const char *prop, const char *val)

Public Member Functions
	QsciLexer (QObject *parent=0)
virtual	~QsciLexer ()
virtual const char *	language () const =0
virtual const char *	lexer () const
virtual int	lexerId () const
QsciAbstractAPIs *	apis () const
virtual const char *	autoCompletionFillups () const
virtual QStringList	autoCompletionWordSeparators () const
int	autoIndentStyle ()
virtual const char *	blockEnd (int *style=0) const
virtual int	blockLookback () const
virtual const char *	blockStart (int *style=0) const
virtual const char *	blockStartKeyword (int *style=0) const
virtual int	braceStyle () const
virtual bool	caseSensitive () const
virtual QColor	color (int style) const
virtual bool	eolFill (int style) const
virtual QFont	font (int style) const
virtual int	indentationGuideView () const
virtual const char *	keywords (int set) const
virtual int	defaultStyle () const
virtual QString	description (int style) const =0
virtual QColor	paper (int style) const
QColor	defaultColor () const
virtual QColor	defaultColor (int style) const
virtual bool	defaultEolFill (int style) const
QFont	defaultFont () const
virtual QFont	defaultFont (int style) const
QColor	defaultPaper () const
virtual QColor	defaultPaper (int style) const
QsciScintilla *	editor () const
void	setAPIs (QsciAbstractAPIs *apis)
void	setDefaultColor (const QColor &c)
void	setDefaultFont (const QFont &f)
void	setDefaultPaper (const QColor &c)
virtual void	setEditor (QsciScintilla *editor)
bool	readSettings (QSettings &qs, const char *prefix="/Scintilla")
virtual void	refreshProperties ()
virtual int	styleBitsNeeded () const
virtual const char *	wordCharacters () const
bool	writeSettings (QSettings &qs, const char *prefix="/Scintilla") const

Protected Member Functions
virtual bool	readProperties (QSettings &qs, const QString &prefix)
virtual bool	writeProperties (QSettings &qs, const QString &prefix) const

Detailed Description

The QsciLexer class is an abstract class used as a base for language lexers.

A lexer scans the text breaking it up into separate language objects, e.g. keywords, strings, operators. The lexer then uses a different style to draw each object. A style is identified by a style number and has a number of attributes, including colour and font. A specific language lexer will implement appropriate default styles which can be overriden by an application by further sub-classing the specific language lexer.

A lexer may provide one or more sets of words to be recognised as keywords. Most lexers only provide one set, but some may support languages embedded in other languages and provide several sets.

QsciLexer provides convenience methods for saving and restoring user preferences for fonts and colours.

If you want to write a lexer for a new language then you can add it to the underlying Scintilla code and implement a corresponding QsciLexer sub-class to manage the different styles used. Alternatively you can implement a sub-class of QsciLexerCustom.

Constructor & Destructor Documentation

QsciLexer::QsciLexer

(

QObject *

parent = 0

)

Construct a QsciLexer with parent parent. parent is typically the QsciScintilla instance.

Member Function Documentation

virtual const char* QsciLexer::language ( ) const

pure virtual

Returns the name of the language. It must be re-implemented by a sub-class.

Implemented in QsciLexerHTML, QsciLexerPerl, QsciLexerCPP, QsciLexerRuby, QsciLexerVerilog, QsciLexerCSS, QsciLexerCoffeeScript, QsciLexerSQL, QsciLexerD, QsciLexerMarkdown, QsciLexerPython, QsciLexerTCL, QsciLexerLua, QsciLexerPOV, QsciLexerPostScript, QsciLexerVHDL, QsciLexerAVS, QsciLexerCMake, QsciLexerFortran77, QsciLexerPascal, QsciLexerPO, QsciLexerBash, QsciLexerJSON, QsciLexerYAML, QsciLexerMatlab, QsciLexerSpice, QsciLexerBatch, QsciLexerDiff, QsciLexerMakefile, QsciLexerProperties, QsciLexerTeX, QsciLexerCSharp, QsciLexerIDL, QsciLexerJavaScript, QsciLexerOctave, QsciLexerFortran, QsciLexerJava, and QsciLexerXML.

virtual const char* QsciLexer::lexer ( ) const

virtual

Returns the name of the lexer. If 0 is returned then the lexer's numeric identifier is used. The default implementation returns 0.

See also

lexerId()

Reimplemented in QsciLexerHTML, QsciLexerPerl, QsciLexerCPP, QsciLexerRuby, QsciLexerVerilog, QsciLexerCSS, QsciLexerCoffeeScript, QsciLexerSQL, QsciLexerD, QsciLexerMarkdown, QsciLexerPython, QsciLexerTCL, QsciLexerLua, QsciLexerPOV, QsciLexerPostScript, QsciLexerVHDL, QsciLexerAVS, QsciLexerCMake, QsciLexerFortran77, QsciLexerPascal, QsciLexerPO, QsciLexerBash, QsciLexerJSON, QsciLexerYAML, QsciLexerMatlab, QsciLexerSpice, QsciLexerBatch, QsciLexerDiff, QsciLexerMakefile, QsciLexerProperties, QsciLexerTeX, QsciLexerOctave, QsciLexerFortran, and QsciLexerXML.

virtual int QsciLexer::lexerId ( ) const

virtual

Returns the identifier (i.e. a QsciScintillaBase::SCLEX_* value) of the lexer. This is only used if lexer() returns 0. The default implementation returns QsciScintillaBase::SCLEX_CONTAINER.

See also

lexer()

QsciAbstractAPIs* QsciLexer::apis

(

)

const

Returns the current API set or 0 if there isn't one.

See also

setAPIs()

virtual QStringList QsciLexer::autoCompletionWordSeparators ( ) const

virtual

Returns the list of character sequences that can separate auto-completion words. The first in the list is assumed to be the sequence used to separate words in the lexer's API files.

Reimplemented in QsciLexerPerl, QsciLexerCPP, QsciLexerCoffeeScript, QsciLexerD, QsciLexerPython, QsciLexerLua, and QsciLexerPascal.

int QsciLexer::autoIndentStyle

(

)

Returns the auto-indentation style. The default is 0 if the language is block structured, or QsciScintilla::AiMaintain if not.

See also

setAutoIndentStyle(), QsciScintilla::AiMaintain, QsciScintilla::AiOpening, QsciScintilla::AiClosing

virtual const char* QsciLexer::blockEnd ( int *  style = 0 ) const

virtual

Returns a space separated list of words or characters in a particular style that define the end of a block for auto-indentation. The style is returned via style.

Reimplemented in QsciLexerPerl, QsciLexerCPP, QsciLexerRuby, QsciLexerCoffeeScript, QsciLexerCSS, QsciLexerD, and QsciLexerPascal.

virtual int QsciLexer::blockLookback ( ) const

virtual

Returns the number of lines prior to the current one when determining the scope of a block when auto-indenting.

Reimplemented in QsciLexerPython.

virtual const char* QsciLexer::blockStart ( int *  style = 0 ) const

virtual

Returns a space separated list of words or characters in a particular style that define the start of a block for auto-indentation. The style is returned via style.

Reimplemented in QsciLexerPerl, QsciLexerCPP, QsciLexerRuby, QsciLexerCoffeeScript, QsciLexerCSS, QsciLexerD, QsciLexerPython, QsciLexerLua, and QsciLexerPascal.

virtual const char* QsciLexer::blockStartKeyword ( int *  style = 0 ) const

virtual

Returns a space separated list of keywords in a particular style that define the start of a block for auto-indentation. The style is returned via style.

Reimplemented in QsciLexerCPP, QsciLexerRuby, QsciLexerCoffeeScript, QsciLexerD, and QsciLexerPascal.

virtual QColor QsciLexer::color ( int  style ) const

virtual

Returns the foreground colour of the text for style number style. The default colour is that returned by defaultColor().

See also

defaultColor(), paper()

virtual bool QsciLexer::eolFill ( int  style ) const

virtual

Returns the end-of-line for style number style. The default is false.

virtual QFont QsciLexer::font ( int  style ) const

virtual

Returns the font for style number style. The default font is that returned by defaultFont().

See also

defaultFont()

virtual const char* QsciLexer::keywords ( int  set ) const

virtual

Returns the set of keywords for the keyword set set recognised by the lexer as a space separated string. 0 is returned if there is no such set.

Reimplemented in QsciLexerHTML, QsciLexerCPP, QsciLexerPerl, QsciLexerRuby, QsciLexerCoffeeScript, QsciLexerD, QsciLexerPython, QsciLexerVerilog, QsciLexerCSS, QsciLexerLua, QsciLexerSQL, QsciLexerTCL, QsciLexerPascal, QsciLexerPOV, QsciLexerVHDL, QsciLexerPostScript, QsciLexerFortran77, QsciLexerBash, QsciLexerAVS, QsciLexerCMake, QsciLexerJSON, QsciLexerBatch, QsciLexerYAML, QsciLexerMatlab, QsciLexerSpice, QsciLexerTeX, QsciLexerXML, QsciLexerCSharp, QsciLexerJavaScript, QsciLexerOctave, QsciLexerFortran, QsciLexerIDL, and QsciLexerJava.

virtual int QsciLexer::defaultStyle ( ) const

virtual

Returns the number of the style used for whitespace. The default implementation returns 0 which is the convention adopted by most lexers.

virtual QString QsciLexer::description ( int  style ) const

pure virtual

Returns the descriptive name for style number style. For a valid style number for this language a non-empty QString must be returned. If the style number is invalid then an empty QString must be returned. This is intended to be used in user preference dialogs.

Implemented in QsciLexerHTML, QsciLexerCPP, QsciLexerPerl, QsciLexerRuby, QsciLexerCoffeeScript, QsciLexerD, QsciLexerPython, QsciLexerVerilog, QsciLexerCSS, QsciLexerLua, QsciLexerSQL, QsciLexerTCL, QsciLexerPascal, QsciLexerMarkdown, QsciLexerPOV, QsciLexerVHDL, QsciLexerPostScript, QsciLexerFortran77, QsciLexerBash, QsciLexerAVS, QsciLexerCMake, QsciLexerJSON, QsciLexerPO, QsciLexerBatch, QsciLexerYAML, QsciLexerSpice, QsciLexerMakefile, QsciLexerMatlab, QsciLexerProperties, QsciLexerDiff, QsciLexerTeX, QsciLexerCSharp, QsciLexerJavaScript, and QsciLexerIDL.

virtual QColor QsciLexer::paper ( int  style ) const

virtual

Returns the background colour of the text for style number style.

See also

defaultPaper(), color()

QColor QsciLexer::defaultColor

(

)

const

Returns the default text colour.

See also

setDefaultColor()

virtual bool QsciLexer::defaultEolFill ( int  style ) const

virtual

Returns the default end-of-line for style number style. The default is false.

Reimplemented in QsciLexerHTML, QsciLexerPerl, QsciLexerCPP, QsciLexerRuby, QsciLexerCoffeeScript, QsciLexerD, QsciLexerVerilog, QsciLexerPython, QsciLexerLua, QsciLexerSQL, QsciLexerTCL, QsciLexerPascal, QsciLexerPOV, QsciLexerVHDL, QsciLexerFortran77, QsciLexerBash, QsciLexerJSON, QsciLexerBatch, QsciLexerYAML, QsciLexerMakefile, QsciLexerProperties, QsciLexerXML, QsciLexerCSharp, and QsciLexerJavaScript.

QFont QsciLexer::defaultFont

(

)

const

Returns the default font.

See also

setDefaultFont()

QColor QsciLexer::defaultPaper

(

)

const

Returns the default paper colour.

See also

setDefaultPaper()

QsciScintilla* QsciLexer::editor ( ) const

inline

Returns the QsciScintilla instance that the lexer is currently attached to or 0 if it is unattached.

void QsciLexer::setAPIs

(

QsciAbstractAPIs *

apis

)

The current set of APIs is set to apis. If apis is 0 then any existing APIs for this lexer are removed.

See also

apis()

void QsciLexer::setDefaultColor

(

const QColor &

c

)

The default text colour is set to c.

See also

defaultColor(), color()

void QsciLexer::setDefaultFont

(

const QFont &

f

)

The default font is set to f.

See also

defaultFont(), font()

void QsciLexer::setDefaultPaper

(

const QColor &

c

)

The default paper colour is set to c.

See also

defaultPaper(), paper()

bool QsciLexer::readSettings	(	QSettings &	qs,
		const char *	prefix = "/Scintilla"
	)

The colour, paper, font and end-of-line for each style number, and all lexer specific properties are read from the settings qs. prefix is prepended to the key of each entry. true is returned if there was no error.

See also

writeSettings(), QsciScintilla::setLexer()

virtual void QsciLexer::refreshProperties ( )

virtual

Causes all properties to be refreshed by emitting the propertyChanged() signal as required.

Reimplemented in QsciLexerHTML, QsciLexerCPP, QsciLexerPerl, QsciLexerRuby, QsciLexerCoffeeScript, QsciLexerD, QsciLexerPython, QsciLexerVerilog, QsciLexerCSS, QsciLexerLua, QsciLexerSQL, QsciLexerTCL, QsciLexerPascal, QsciLexerPOV, QsciLexerVHDL, QsciLexerPostScript, QsciLexerFortran77, QsciLexerBash, QsciLexerAVS, QsciLexerCMake, QsciLexerJSON, QsciLexerPO, QsciLexerYAML, QsciLexerProperties, QsciLexerTeX, and QsciLexerXML.

virtual int QsciLexer::styleBitsNeeded ( ) const

virtual

Returns the number of style bits needed by the lexer. Normally this should only be re-implemented by custom lexers.

Reimplemented in QsciLexerCustom.

virtual const char* QsciLexer::wordCharacters ( ) const

virtual

Returns the string of characters that comprise a word. The default is 0 which implies the upper and lower case alphabetic characters and underscore.

Reimplemented in QsciLexerHTML, QsciLexerPerl, QsciLexerCPP, QsciLexerCoffeeScript, QsciLexerD, QsciLexerCSS, QsciLexerVerilog, QsciLexerPOV, QsciLexerAVS, QsciLexerBash, QsciLexerBatch, QsciLexerDiff, QsciLexerMakefile, QsciLexerProperties, and QsciLexerTeX.

bool QsciLexer::writeSettings	(	QSettings &	qs,
		const char *	prefix = "/Scintilla"
	)		const

The colour, paper, font and end-of-line for each style number, and all lexer specific properties are written to the settings qs. prefix is prepended to the key of each entry. true is returned if there was no error.

See also

readSettings()

virtual void QsciLexer::setAutoIndentStyle ( int  autoindentstyle )

virtualslot

The auto-indentation style is set to autoindentstyle.

See also

autoIndentStyle(), QsciScintilla::AiMaintain, QsciScintilla::AiOpening, QsciScintilla::AiClosing

virtual void QsciLexer::setColor ( const QColor &  c, int  style = -1  )

virtualslot

The foreground colour for style number style is set to c. If style is -1 then the colour is set for all styles.

virtual void QsciLexer::setEolFill ( bool  eoffill, int  style = -1  )

virtualslot

The end-of-line fill for style number style is set to eoffill. If style is -1 then the fill is set for all styles.

virtual void QsciLexer::setFont ( const QFont &  f, int  style = -1  )

virtualslot

The font for style number style is set to f. If style is -1 then the font is set for all styles.

virtual void QsciLexer::setPaper ( const QColor &  c, int  style = -1  )

virtualslot

The background colour for style number style is set to c. If style is -1 then the colour is set for all styles.

void QsciLexer::colorChanged ( const QColor &  c, int  style  )

signal

This signal is emitted when the foreground colour of style number style has changed. The new colour is c.

void QsciLexer::eolFillChanged ( bool  eolfilled, int  style  )

signal

This signal is emitted when the end-of-file fill of style number style has changed. The new fill is eolfilled.

void QsciLexer::fontChanged ( const QFont &  f, int  style  )

signal

This signal is emitted when the font of style number style has changed. The new font is f.

void QsciLexer::paperChanged ( const QColor &  c, int  style  )

signal

This signal is emitted when the background colour of style number style has changed. The new colour is c.

void QsciLexer::propertyChanged ( const char *  prop, const char *  val  )

signal

This signal is emitted when the value of the lexer property prop needs to be changed. The new value is val.

virtual bool QsciLexer::readProperties ( QSettings &  qs, const QString &  prefix  )

protectedvirtual

The lexer's properties are read from the settings qs. prefix (which has a trailing '/') should be used as a prefix to the key of each setting. true is returned if there is no error.

Reimplemented in QsciLexerHTML, QsciLexerCPP, QsciLexerPerl, QsciLexerPython, QsciLexerSQL, QsciLexerCoffeeScript, QsciLexerVerilog, QsciLexerCSS, QsciLexerRuby, QsciLexerD, QsciLexerPascal, QsciLexerVHDL, QsciLexerPOV, QsciLexerPostScript, QsciLexerLua, QsciLexerTCL, QsciLexerJSON, QsciLexerBash, QsciLexerAVS, QsciLexerFortran77, QsciLexerPO, QsciLexerCMake, QsciLexerTeX, QsciLexerProperties, QsciLexerYAML, and QsciLexerXML.

Referenced by QsciLexerPerl::foldAtElse(), QsciLexerVerilog::foldAtModule(), QsciLexerTCL::foldComments(), QsciLexerJSON::foldCompact(), QsciLexerRuby::foldCompact(), QsciLexerProperties::initialSpaces(), QsciLexerHTML::makoTemplates(), QsciLexerTeX::processIf(), QsciLexerSQL::quotedIdentifiers(), QsciLexerCSS::SCSSLanguage(), QsciLexerCoffeeScript::stylePreprocessor(), QsciLexerPython::v3BytesAllowed(), and QsciLexerCPP::verbatimStringEscapeSequencesAllowed().

virtual bool QsciLexer::writeProperties ( QSettings &  qs, const QString &  prefix  ) const

protectedvirtual

The lexer's properties are written to the settings qs. prefix (which has a trailing '/') should be used as a prefix to the key of each setting. true is returned if there is no error.

Reimplemented in QsciLexerHTML, QsciLexerCPP, QsciLexerPerl, QsciLexerPython, QsciLexerSQL, QsciLexerCoffeeScript, QsciLexerVerilog, QsciLexerCSS, QsciLexerD, QsciLexerRuby, QsciLexerPascal, QsciLexerVHDL, QsciLexerPOV, QsciLexerPostScript, QsciLexerLua, QsciLexerTCL, QsciLexerJSON, QsciLexerBash, QsciLexerAVS, QsciLexerFortran77, QsciLexerPO, QsciLexerCMake, QsciLexerTeX, QsciLexerProperties, QsciLexerYAML, and QsciLexerXML.

Referenced by QsciLexerPerl::foldAtElse(), QsciLexerVerilog::foldAtModule(), QsciLexerTCL::foldComments(), QsciLexerJSON::foldCompact(), QsciLexerRuby::foldCompact(), QsciLexerProperties::initialSpaces(), QsciLexerHTML::makoTemplates(), QsciLexerTeX::processIf(), QsciLexerSQL::quotedIdentifiers(), QsciLexerCSS::SCSSLanguage(), QsciLexerCoffeeScript::stylePreprocessor(), QsciLexerPython::v3BytesAllowed(), and QsciLexerCPP::verbatimStringEscapeSequencesAllowed().