com.lowagie.text.pdf

Class ArabicLigaturizer

public class ArabicLigaturizer extends Object

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 is the original work of Paulo Soares. Hence it is perfectly justifiable to distribute it under the MPL.

Author: Paulo Soares (psoares@consiste.pt)

Nested Class Summary
static class	ArabicLigaturizer.charstruct

Field Summary
static char	ALEF
static char	ALEFHAMZA
static char	ALEFHAMZABELOW
static char	ALEFMADDA
static char	ALEFMAKSURA
static int	ar_composedtashkeel
static int	ar_lig
static int	ar_nothing
static int	ar_novowel
static char[][]	chartable
static char	DAMMA
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.
static int	DIGITS_RESERVED Not a valid option value.
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 char	FARSIYEH
static char	FATHA
static char	HAMZA
static char	HAMZAABOVE
static char	HAMZABELOW
static char	KASRA
static char	LAM
static char	LAM_ALEF
static char	LAM_ALEFHAMZA
static char	LAM_ALEFHAMZABELOW
static char	LAM_ALEFMADDA
static char	MADDA
static char	SHADDA
static char	TATWEEL
static char	WAW
static char	WAWHAMZA
static char	YEH
static char	YEHHAMZA
static char	ZWJ

Method Summary
static int	arabic_shape(char[] src, int srcoffset, int srclength, char[] dest, int destoffset, int destlength, int level)
static char	charshape(char s, int which)
static boolean	connects_to_left(ArabicLigaturizer.charstruct a)
static void	copycstostring(StringBuffer string, ArabicLigaturizer.charstruct s, int level)
static void	doublelig(StringBuffer string, int level)
static boolean	isVowel(char s)
static int	ligature(char newchar, ArabicLigaturizer.charstruct oldchar)
static void	processNumbers(char[] text, int offset, int length, int options)
static void	shape(char[] text, StringBuffer string, int level)
static int	shapecount(char s)
static void	shapeToArabicDigitsWithContext(char[] dest, int start, int length, char digitBase, boolean lastStrongWasAL)

Field Detail

ALEF

private static final char ALEF

ALEFHAMZA

private static final char ALEFHAMZA

ALEFHAMZABELOW

private static final char ALEFHAMZABELOW

ALEFMADDA

private static final char ALEFMADDA

ALEFMAKSURA

private static final char ALEFMAKSURA

ar_composedtashkeel

public static final int ar_composedtashkeel

ar_lig

public static final int ar_lig

ar_nothing

public static final int ar_nothing

ar_novowel

public static final int ar_novowel

chartable

private static final char[][] chartable

DAMMA

private static final char DAMMA

DIGITS_AN2EN

public static final int DIGITS_AN2EN

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

DIGITS_EN2AN

public static final int DIGITS_EN2AN

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

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.

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.