fribidi_get_par_direction(3) Programmer's Manual fribidi_get_par_direction(3)
NAME
fribidi_get_par_direction - get base paragraph direction
SYNOPSIS
#include <fribidi.h>
extern FriBidiParType fribidi_get_par_direction
(
const FriBidiCharType *bidi_types,
const FriBidiStrIndex len
);
PARAMETERS
const FriBidiCharType *bidi_types
Input list of bidi types as returned by
fribidi_get_bidi_types().
Since there are 23 possible values for a const FriBidiCharType,
they are not all listed here.
const FriBidiStrIndex len
Input string length.
DESCRIPTION
This function finds the base direction of a single paragraph, as de-
fined by rule P2 of the Unicode Bidirectional Algorithm available at
http://www.unicode.org/reports/tr9/#P2.
You typically do not need this function as fribidi_get_par_embed-
ding_levels() knows how to compute base direction itself, but you may
need this to implement a more sophisticated paragraph direction han-
dling. Note that you can pass more than a paragraph to this function
and the direction of the first non-neutral paragraph is returned, which
is a very good heuristic to set direction of the neutral paragraphs at
the beginning of text. For other neutral paragraphs, you better use
the direction of the previous paragraph.
RETURNS
Base pargraph direction. No weak paragraph direction is returned, only
LTR, RTL, or ON.
Possible values for an extern FriBidiParType are as follows:
FRIBIDI_PAR_LTR Left-To-Right paragraph.
FRIBIDI_PAR_RTL Right-To-Left paragraph.
FRIBIDI_PAR_ON DirectiOn-Neutral paragraph.
FRIBIDI_PAR_WLTR Weak Left To Right paragraph.
FRIBIDI_PAR_WRTL Weak Right To Left paragraph.
SEE ALSO
fribidi_shape_arabic(3), fribidi_get_par_embedding_levels_ex(3),
fribidi_reorder_line(3), fribidi_get_bidi_type(3),
fribidi_get_bidi_types(3), fribidi_get_bidi_type_name(3), fribidi_de-
bug_status(3), fribidi_set_debug(3), fribidi_charset_to_unicode(3),
fribidi_unicode_to_charset(3), fribidi_parse_charset(3), fribidi_mir-
roring_status(3), fribidi_set_mirroring(3), fribidi_reorder_nsm_sta-
tus(3), fribidi_set_reorder_nsm(3), fribidi_log2vis_get_embedding_lev-
els(3), fribidi_get_type(3), fribidi_get_type_internal(3),
fribidi_get_par_embedding_levels(3), fribidi_join_arabic(3),
fribidi_get_joining_type(3), fribidi_get_joining_types(3),
fribidi_get_joining_type_name(3), fribidi_get_mirror_char(3),
fribidi_shape_mirroring(3), fribidi_get_bracket(3),
fribidi_get_bracket_types(3), fribidi_shape(3), fribidi_re-
move_bidi_marks(3)
c2man fribidi-bidi.h 20 July 2018 fribidi_get_par_direction(3)
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