2 * fribidi-joining.h - Arabic joining algorithm
5 * Behdad Esfahbod, 2004
7 * Copyright (C) 2004 Sharif FarsiWeb, Inc
8 * Copyright (C) 2004 Behdad Esfahbod
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this library, in a file named COPYING; if not, write to the
22 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 * Boston, MA 02110-1301, USA
25 * For licensing issues, contact <fribidi.license@gmail.com>.
27 #ifndef _FRIBIDI_JOINING_H
28 #define _FRIBIDI_JOINING_H
30 #include "fribidi-common.h"
32 #include "fribidi-types.h"
33 #include "fribidi-bidi-types.h"
34 #include "fribidi-joining-types.h"
36 #include "fribidi-begindecls.h"
38 /* fribidi_join_arabic - do Arabic joining
40 * This function does the Arabic joining algorithm. Means, given Arabic
41 * joining types of the characters in ar_props (don't worry,
42 * FriBidiJoiningType can be casted to FriBidiArabicProp automagically), this
43 * function modifies this properties to grasp the effect of neighboring
44 * characters. You probably need this information later to do Arabic shaping.
46 * This function implements rules R1 to R7 inclusive (all rules) of the Arabic
47 * Cursive Joining algorithm of the Unicode standard as available at
48 * http://www.unicode.org/versions/Unicode4.0.0/ch08.pdf#G7462. It also
49 * interacts correctly with the bidirection algorithm as defined in Section
50 * 3.5 Shaping of the Unicode Bidirectional Algorithm available at
51 * http://www.unicode.org/reports/tr9/#Shaping.
53 * There are a few macros defined in fribidi-joining-types.h for querying the
54 * Arabic properties computed by this function.
56 FRIBIDI_ENTRY void fribidi_join_arabic (
57 const FriBidiCharType *bidi_types, /* input list of bidi types as
59 fribidi_get_bidi_types() */
60 const FriBidiStrIndex len, /* input string length */
61 const FriBidiLevel *embedding_levels, /* input list of embedding
62 levels, as returned by
63 fribidi_get_par_embedding_levels */
64 FriBidiArabicProp *ar_props /* Arabic properties to analyze, initialized by
65 joining types, as returned by
66 fribidi_get_joining_types */
69 #include "fribidi-enddecls.h"
71 #endif /* !_FRIBIDI_JOINING_H */
73 * vim:textwidth=78:tabstop=8:shiftwidth=2:autoindent:cindent