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fribidi_get_par_embedding_levels
Langue: en
Version: 30 January 2006 (fedora - 05/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
fribidi_get_par_embedding_levels - get bidi embedding levels of a paragraphSYNOPSIS
#include <fribidi.h>FriBidiLevel fribidi_get_par_embedding_levels
(
const FriBidiCharType *bidi_types,
const FriBidiStrIndex len,
FriBidiParType *pbase_dir,
FriBidiLevel *embedding_levels
);
PARAMETERS
- const FriBidiCharType *bidi_types
- Input list of bidi types as returned by fribidi_get_bidi_types().
Possible values for a const FriBidiCharType are as follows:
-
- FRIBIDI_TYPE_LTR
- Left-To-Right letter.
- FRIBIDI_TYPE_RTL
- Right-To-Left letter.
- FRIBIDI_TYPE_AL
- Arabic Letter.
- FRIBIDI_TYPE_EN
- European Numeral.
- FRIBIDI_TYPE_AN
- Arabic Numeral.
- FRIBIDI_TYPE_ES
- European number Separator.
- FRIBIDI_TYPE_ET
- European number Terminator.
- FRIBIDI_TYPE_CS
- Common Separator.
- FRIBIDI_TYPE_NSM
- Non Spacing Mark.
- FRIBIDI_TYPE_BN
- Boundary Neutral.
- FRIBIDI_TYPE_BS
- Block Separator.
- FRIBIDI_TYPE_SS
- Segment Separator.
- FRIBIDI_TYPE_WS
- WhiteSpace.
- FRIBIDI_TYPE_ON
- Other Neutral.
- FRIBIDI_TYPE_LRE
- Left-to-Right Embedding.
- FRIBIDI_TYPE_RLE
- Right-to-Left Embedding.
- FRIBIDI_TYPE_LRO
- Left-to-Right Override.
- FRIBIDI_TYPE_RLO
- Right-to-Left Override.
- FRIBIDI_TYPE_PDF
- Pop Directional Flag.
-
- const FriBidiStrIndex len
- Input string length of the paragraph.
- FriBidiParType *pbase_dir
- Requested and resolved paragraph base direction.
Possible values for a 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.
-
- FriBidiLevel *embedding_levels
- Output list of embedding levels.
DESCRIPTION
This function finds the bidi embedding levels of a single paragraph, as defined by the Unicode Bidirectional Algorithm available at http://www.unicode.org/reports/tr9/. This function implements rules P2 to I1 inclusive, and parts 1 to 3 of L1, except for rule X9 which is implemented in fribidi_remove_bidi_marks(). Part 4 of L1 is implemented in fribidi_reorder_line().There are a few macros defined in fribidi-bidi-types.h to work with this embedding levels.
RETURNS
Maximum level found plus one, or zero if any error occured (memory allocation failure most probably).SEE ALSO
fribidi_charset_to_unicode(3), fribidi_unicode_to_charset(3), fribidi_parse_charset(3), fribidi_shape_arabic(3), fribidi_get_par_direction(3), fribidi_reorder_line(3), fribidi_get_bidi_type(3), fribidi_get_bidi_types(3), fribidi_get_bidi_type_name(3), fribidi_debug_status(3), fribidi_mirroring_status(3), fribidi_set_mirroring(3), fribidi_reorder_nsm_status(3), fribidi_set_reorder_nsm(3), fribidi_log2vis_get_embedding_levels(3), fribidi_get_type(3), fribidi_get_type_internal(3), fribidi_remove_bidi_marks(3), fribidi_log2vis(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_shape(3)Contenus ©2006-2024 Benjamin Poulain
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