com.itextpdf.text.pdf
Class ArabicLigaturizer

java.lang.Object
  extended by com.itextpdf.text.pdf.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 class is the original work of Paulo Soares.

Author:
Paulo Soares

Nested Class Summary
(package private) static class ArabicLigaturizer.charstruct
           
 
Field Summary
private static char ALEF
           
private static char ALEFHAMZA
           
private static char ALEFHAMZABELOW
           
private static char ALEFMADDA
           
private static char ALEFMAKSURA
           
static int ar_composedtashkeel
           
static int ar_lig
           
static int ar_nothing
           
static int ar_novowel
           
private static char[][] chartable
           
private static char DAMMA
           
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.
private static int DIGITS_RESERVED
          Not a valid option value.
private static char FARSIYEH
           
private static char FATHA
           
private static char HAMZA
           
private static char HAMZAABOVE
           
private static char HAMZABELOW
           
private static char KASRA
           
private static char LAM
           
private static char LAM_ALEF
           
private static char LAM_ALEFHAMZA
           
private static char LAM_ALEFHAMZABELOW
           
private static char LAM_ALEFMADDA
           
private static char MADDA
           
private static char SHADDA
           
private static char TATWEEL
           
private static char WAW
           
private static char WAWHAMZA
           
private static char YEH
           
private static char YEHHAMZA
           
private static char ZWJ
           
 
Constructor Summary
ArabicLigaturizer()
           
 
Method Summary
(package private) static int arabic_shape(char[] src, int srcoffset, int srclength, char[] dest, int destoffset, int destlength, int level)
           
(package private) static char charshape(char s, int which)
           
(package private) static boolean connects_to_left(ArabicLigaturizer.charstruct a)
           
(package private) static void copycstostring(StringBuffer string, ArabicLigaturizer.charstruct s, int level)
           
(package private) static void doublelig(StringBuffer string, int level)
           
(package private) static boolean isVowel(char s)
           
(package private) static int ligature(char newchar, ArabicLigaturizer.charstruct oldchar)
           
(package private) static void processNumbers(char[] text, int offset, int length, int options)
           
(package private) static void shape(char[] text, StringBuffer string, int level)
           
(package private) static int shapecount(char s)
           
(package private) static void shapeToArabicDigitsWithContext(char[] dest, int start, int length, char digitBase, boolean lastStrongWasAL)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

ALEF

private static final char ALEF
See Also:
Constant Field Values

ALEFHAMZA

private static final char ALEFHAMZA
See Also:
Constant Field Values

ALEFHAMZABELOW

private static final char ALEFHAMZABELOW
See Also:
Constant Field Values

ALEFMADDA

private static final char ALEFMADDA
See Also:
Constant Field Values

LAM

private static final char LAM
See Also:
Constant Field Values

HAMZA

private static final char HAMZA
See Also:
Constant Field Values

TATWEEL

private static final char TATWEEL
See Also:
Constant Field Values

ZWJ

private static final char ZWJ
See Also:
Constant Field Values

HAMZAABOVE

private static final char HAMZAABOVE
See Also:
Constant Field Values

HAMZABELOW

private static final char HAMZABELOW
See Also:
Constant Field Values

WAWHAMZA

private static final char WAWHAMZA
See Also:
Constant Field Values

YEHHAMZA

private static final char YEHHAMZA
See Also:
Constant Field Values

WAW

private static final char WAW
See Also:
Constant Field Values

ALEFMAKSURA

private static final char ALEFMAKSURA
See Also:
Constant Field Values

YEH

private static final char YEH
See Also:
Constant Field Values

FARSIYEH

private static final char FARSIYEH
See Also:
Constant Field Values

SHADDA

private static final char SHADDA
See Also:
Constant Field Values

KASRA

private static final char KASRA
See Also:
Constant Field Values

FATHA

private static final char FATHA
See Also:
Constant Field Values

DAMMA

private static final char DAMMA
See Also:
Constant Field Values

MADDA

private static final char MADDA
See Also:
Constant Field Values

LAM_ALEF

private static final char LAM_ALEF
See Also:
Constant Field Values

LAM_ALEFHAMZA

private static final char LAM_ALEFHAMZA
See Also:
Constant Field Values

LAM_ALEFHAMZABELOW

private static final char LAM_ALEFHAMZABELOW
See Also:
Constant Field Values

LAM_ALEFMADDA

private static final char LAM_ALEFMADDA
See Also:
Constant Field Values

chartable

private static final char[][] chartable

ar_nothing

public static final int ar_nothing
See Also:
Constant Field Values

ar_novowel

public static final int ar_novowel
See Also:
Constant Field Values

ar_composedtashkeel

public static final int ar_composedtashkeel
See Also:
Constant Field Values

ar_lig

public static final int ar_lig
See Also:
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.

See Also:
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).

See Also:
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.

See Also:
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.

See Also:
Constant Field Values

DIGITS_RESERVED

private static final int DIGITS_RESERVED
Not a valid option value.

See Also:
Constant Field Values

DIGITS_MASK

public static final int DIGITS_MASK
Bit mask for digit shaping options.

See Also:
Constant Field Values

DIGIT_TYPE_AN

public static final int DIGIT_TYPE_AN
Digit type option: Use Arabic-Indic digits (U+0660...U+0669).

See Also:
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).

See Also:
Constant Field Values

DIGIT_TYPE_MASK

public static final int DIGIT_TYPE_MASK
Bit mask for digit type options.

See Also:
Constant Field Values
Constructor Detail

ArabicLigaturizer

public ArabicLigaturizer()
Method Detail

isVowel

static boolean isVowel(char s)

charshape

static char charshape(char s,
                      int which)

shapecount

static int shapecount(char s)

ligature

static int ligature(char newchar,
                    ArabicLigaturizer.charstruct oldchar)

copycstostring

static void copycstostring(StringBuffer string,
                           ArabicLigaturizer.charstruct s,
                           int level)

doublelig

static void doublelig(StringBuffer string,
                      int level)

connects_to_left

static boolean connects_to_left(ArabicLigaturizer.charstruct a)

shape

static void shape(char[] text,
                  StringBuffer string,
                  int level)

arabic_shape

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

processNumbers

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

shapeToArabicDigitsWithContext

static void shapeToArabicDigitsWithContext(char[] dest,
                                           int start,
                                           int length,
                                           char digitBase,
                                           boolean lastStrongWasAL)

Hosted by Hostbasket