com.itextpdf.text.pdf.languages

Class ArabicLigaturizer

java.lang.Object

com.itextpdf.text.pdf.languages.ArabicLigaturizer

All Implemented Interfaces:

LanguageProcessor

public class ArabicLigaturizer
extends Object
implements LanguageProcessor

Shape arabic characters. This code was inspired by an LGPL'ed C library: Pango ( see http://www.pango.com/ ). Note that the code of this class is the original work of Paulo Soares.

Author:

Paulo Soares

Field Summary

Fields

Modifier and Type	Field and Description
static int	ar_composedtashkeel
static int	ar_lig
static int	ar_nothing
static int	ar_novowel
static int	DIGIT_TYPE_AN Digit type option: Use Arabic-Indic digits (U+0660...U+0669).
static int	DIGIT_TYPE_AN_EXTENDED Digit type option: Use Eastern (Extended) Arabic-Indic digits (U+06f0...U+06f9).
static int	DIGIT_TYPE_MASK Bit mask for digit type options.
static int	DIGITS_AN2EN Digit shaping option: Replace Arabic-Indic digits by European digits (U+0030...U+0039).
static int	DIGITS_EN2AN Digit shaping option: Replace European digits (U+0030...U+0039) by Arabic-Indic digits.
static int	DIGITS_EN2AN_INIT_AL Digit shaping option: Replace European digits (U+0030...U+0039) by Arabic-Indic digits if the most recent strongly directional character is an Arabic letter (its Bidi direction value is RIGHT_TO_LEFT_ARABIC).
static int	DIGITS_EN2AN_INIT_LR Digit shaping option: Replace European digits (U+0030...U+0039) by Arabic-Indic digits if the most recent strongly directional character is an Arabic letter (its Bidi direction value is RIGHT_TO_LEFT_ARABIC).
static int	DIGITS_MASK Bit mask for digit shaping options.
protected int	options
protected int	runDirection

Constructor Summary

Constructors

Constructor and Description
ArabicLigaturizer()
ArabicLigaturizer(int runDirection, int options)

Method Summary

Modifier and Type	Method and Description
static int	arabic_shape(char[] src, int srcoffset, int srclength, char[] dest, int destoffset, int destlength, int level)
static Character	getReverseMapping(char c)
boolean	isRTL() Arabic is written from right to left.
String	process(String s) Processes a String
static void	processNumbers(char[] text, int offset, int length, int options)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ar_nothing

public static final int ar_nothing

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Constant Field Values

ar_novowel

public static final int ar_novowel

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Constant Field Values

ar_composedtashkeel

public static final int ar_composedtashkeel

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Constant Field Values

ar_lig

public static final int ar_lig

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Constant Field Values

DIGITS_EN2AN

public static final int DIGITS_EN2AN

Digit shaping option: Replace European digits (U+0030...U+0039) by Arabic-Indic digits.

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Constant Field Values

DIGITS_AN2EN

public static final int DIGITS_AN2EN

Digit shaping option: Replace Arabic-Indic digits by European digits (U+0030...U+0039).

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Constant Field Values

DIGITS_EN2AN_INIT_LR

public static final int DIGITS_EN2AN_INIT_LR

Digit shaping option: Replace European digits (U+0030...U+0039) by Arabic-Indic digits if the most recent strongly directional character is an Arabic letter (its Bidi direction value is RIGHT_TO_LEFT_ARABIC). The initial state at the start of the text is assumed to be not an Arabic, letter, so European digits at the start of the text will not change. Compare to DIGITS_ALEN2AN_INIT_AL.

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Constant Field Values

DIGITS_EN2AN_INIT_AL

public static final int DIGITS_EN2AN_INIT_AL

Digit shaping option: Replace European digits (U+0030...U+0039) by Arabic-Indic digits if the most recent strongly directional character is an Arabic letter (its Bidi direction value is RIGHT_TO_LEFT_ARABIC). The initial state at the start of the text is assumed to be an Arabic, letter, so European digits at the start of the text will change. Compare to DIGITS_ALEN2AN_INT_LR.

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Constant Field Values

DIGITS_MASK

public static final int DIGITS_MASK

Bit mask for digit shaping options.

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Constant Field Values

DIGIT_TYPE_AN

public static final int DIGIT_TYPE_AN

Digit type option: Use Arabic-Indic digits (U+0660...U+0669).

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Constant Field Values

DIGIT_TYPE_AN_EXTENDED

public static final int DIGIT_TYPE_AN_EXTENDED

Digit type option: Use Eastern (Extended) Arabic-Indic digits (U+06f0...U+06f9).

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Constant Field Values

DIGIT_TYPE_MASK

public static final int DIGIT_TYPE_MASK

Bit mask for digit type options.

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Constant Field Values

options

protected int options

runDirection

protected int runDirection

Constructor Detail

ArabicLigaturizer

public ArabicLigaturizer()

ArabicLigaturizer

public ArabicLigaturizer(int runDirection,
                         int options)

Method Detail

arabic_shape

public static int arabic_shape(char[] src,
                               int srcoffset,
                               int srclength,
                               char[] dest,
                               int destoffset,
                               int destlength,
                               int level)

processNumbers

public static void processNumbers(char[] text,
                                  int offset,
                                  int length,
                                  int options)

getReverseMapping

public static Character getReverseMapping(char c)

process

public String process(String s)

Description copied from interface: LanguageProcessor

Processes a String

Specified by:

process in interface LanguageProcessor

Parameters:

s - the original String

Returns:

the processed String

isRTL

public boolean isRTL()

Arabic is written from right to left.

Specified by:

isRTL in interface LanguageProcessor

Returns:

true

See Also:

LanguageProcessor.isRTL()