JKQTPCSSParser Class Reference

A simple parser for certain CSS subsets. More...

#include <jkqtpcsstools.h>

Collaboration diagram for JKQTPCSSParser:

Classes
struct	GeneralError
struct	NumberWithUnit
	encodes a number with its unit, e.g. 100% or 45deg or ... More...
struct	RawErrorTag_t
struct	Token
struct	UnconvertobleError
	Exception when a string cannot be converted properly. More...
struct	UnexpectedTermError
	Exception for unexpected Term. More...
struct	UnexpectedTokenError
	Exception for unexpected Token. More...
struct	WrongNumberOfArgumentError
	Exception for wrong number of function arguments. More...

Static Public Member Functions
static QColor	readColor (const QString &prog)
	parses the given expression, which should represent a color (incl. color-functions like rgb() )
static QGradient	readGradient (const QString &prog)
	parses the given expression, which should represent a QGradient
static NumberWithUnit	readNumberWithUnit (const QString &prog)
	parses the given expression

Protected Member Functions
	JKQTPCSSParser (const QString &text)
	class constructor
Parser
JKQTPExpected< JKQTPCSSParser::NumberWithUnit, JKQTPCSSParser::GeneralError >	parseNumberWithUnit (bool get)
	parses a number with unit
JKQTPExpected< QColor, JKQTPCSSParser::GeneralError >	parseColor (bool get)
	parses a color definition <color>
JKQTPExpected< QGradient, JKQTPCSSParser::GeneralError >	parseGradient (bool get)
	parses a color definition <gradient>

Static Protected Attributes
Error Handling
static RawErrorTag_t	RawErrorTag

Tokenizer
Token	CurrentToken
	the current token while parsing a string
QString	text
	this stream is used to read in the program. An object is created and assigned (and destroyed) by the parse()-function
int	pos
	current reading position in text
Token	peekNextToken (int *endPos=nullptr)
	Tokenizer: look at the next token from the input, but don't set it as CurrentToken and don't move the read pointer pos.
Token	getToken ()
	Tokenizer: extract the next token from the input.
bool	textAtEnd () const
	indicates whether pos points to the end of text
bool	getCh (QChar &ch)
bool	peekCh (QChar &ch)
void	putBackCh ()

Detailed Description

A simple parser for certain CSS subsets.

EBNF definition of the parsed expressions

<lingradient>         -> linear-gradient( <angle>? , <gradientstops> )
<angle>               -> <numberwithunit>
                       | to (left|right|bottom|top) (left|right|bottom|top)?
<numberwithunit>      -> <number> [A-Za-z%]*
<gradientstops>       -> <gradientstop> | <gradientstop> , <gradientstops>
<gradientstop>        -> <color> (<number>%)?
<color>               -> NAME
                       | #<hexnumber>
                       | (rgb | rgba | hsl | hsv | gray | grey | red | green | blue) ( (<numberwithunit> [,/]? ){1-4} )

<number>              -> floating-point-number, i.e.  "[+-]?\d+\.?\d*"
<hexnumber>           -> RGB | RRGGBB | RGBA | RRGGBBAA

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Class Documentation

JKQTPCSSParser::RawErrorTag_t

struct JKQTPCSSParser::RawErrorTag_t

Constructor & Destructor Documentation

JKQTPCSSParser()

JKQTPCSSParser::JKQTPCSSParser ( const QString & text )

protected

class constructor

Note

This also registers all standatd functions and constants by calling addStandardFunctions() and addStandardVariables()

Member Function Documentation

getCh()

bool JKQTPCSSParser::getCh ( QChar & ch )

inlineprotected

getToken()

Token JKQTPCSSParser::getToken ( )

protected

Tokenizer: extract the next token from the input.

parseColor()

JKQTPExpected< QColor, JKQTPCSSParser::GeneralError > JKQTPCSSParser::parseColor ( bool get )

protected

parses a color definition <color>

parseGradient()

JKQTPExpected< QGradient, JKQTPCSSParser::GeneralError > JKQTPCSSParser::parseGradient ( bool get )

protected

parses a color definition <gradient>

parseNumberWithUnit()

JKQTPExpected< JKQTPCSSParser::NumberWithUnit, JKQTPCSSParser::GeneralError > JKQTPCSSParser::parseNumberWithUnit ( bool get )

protected

parses a number with unit

peekCh()

bool JKQTPCSSParser::peekCh ( QChar & ch )

inlineprotected

peekNextToken()

Token JKQTPCSSParser::peekNextToken ( int * endPos = nullptr )

protected

Tokenizer: look at the next token from the input, but don't set it as CurrentToken and don't move the read pointer pos.

putBackCh()

void JKQTPCSSParser::putBackCh ( )

inlineprotected

readColor()

QColor JKQTPCSSParser::readColor ( const QString & prog )

static

parses the given expression, which should represent a color (incl. color-functions like rgb() )

readGradient()

QGradient JKQTPCSSParser::readGradient ( const QString & prog )

static

parses the given expression, which should represent a QGradient

readNumberWithUnit()

NumberWithUnit JKQTPCSSParser::readNumberWithUnit ( const QString & prog )

static

parses the given expression

textAtEnd()

bool JKQTPCSSParser::textAtEnd ( ) const

inlineprotected

indicates whether pos points to the end of text

Member Data Documentation

CurrentToken

Token JKQTPCSSParser::CurrentToken

protected

the current token while parsing a string

pos

int JKQTPCSSParser::pos

protected

current reading position in text

RawErrorTag

RawErrorTag_t JKQTPCSSParser::RawErrorTag

staticprotected

text

QString JKQTPCSSParser::text

protected

this stream is used to read in the program. An object is created and assigned (and destroyed) by the parse()-function

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The documentation for this class was generated from the following file:

• jkqtpcsstools.h