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/* FriBidi - Library of BiDi algorithm
* Copyright (C) 1999,2000 Dov Grobgeld, and
* Copyright (C) 2001 Behdad Esfahbod.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library, in a file named COPYING.LIB; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA
*
* For licensing issues, contact <dov@imagic.weizmann.ac.il> and
* <fwpg@sharif.edu>.
*/
#ifndef FRIBIDI_TYPES_H
#define FRIBIDI_TYPES_H
#ifndef FRIBIDI_USE_MINI_GLIB
#include <glib.h>
#else
#include "fribidi_mini_glib.h"
#endif
typedef guint32 FriBidiChar;
typedef guint16 FriBidiStrIndex;
/* Define some bit masks, that character types are based on, each one has
only one bit on. */
typedef enum
{
FRIBIDI_MASK_RTL = 0x00000001, /* Is right to left */
FRIBIDI_MASK_ARABIC = 0x00000002, /* Is arabic */
/* Each char can be only one of the three following. */
FRIBIDI_MASK_STRONG = 0x00000010, /* Is strong */
FRIBIDI_MASK_WEAK = 0x00000020, /* Is weak */
FRIBIDI_MASK_NEUTRAL = 0x00000040, /* Is neutral */
FRIBIDI_MASK_SENTINEL = 0x00000080, /* Is sentinel: SOT, EOT */
/* Sentinels are not valid chars, just identify the start and end of strings. */
/* Each char can be only one of the five following. */
FRIBIDI_MASK_LETTER = 0x00000100, /* Is letter: L, R, AL */
FRIBIDI_MASK_NUMBER = 0x00000200, /* Is number: EN, AN */
FRIBIDI_MASK_NUMSEPTER = 0x00000400, /* Is number separator or terminator: ES, ET, CS */
FRIBIDI_MASK_SPACE = 0x00000800, /* Is space: BN, BS, SS, WS */
FRIBIDI_MASK_EXPLICIT = 0x00001000, /* Is expilict mark: LRE, RLE, LRO, RLO, PDF */
/* Can be on only if FRIBIDI_MASK_SPACE is also on. */
FRIBIDI_MASK_SEPARATOR = 0x00002000, /* Is test separator: BS, SS */
/* Can be on only if FRIBIDI_MASK_EXPLICIT is also on. */
FRIBIDI_MASK_OVERRIDE = 0x00004000, /* Is explicit override: LRO, RLO */
/* The following must be to make types pairwise different, some of them can
be removed but are here because of efficiency (make queries faster). */
FRIBIDI_MASK_ES = 0x00010000,
FRIBIDI_MASK_ET = 0x00020000,
FRIBIDI_MASK_CS = 0x00040000,
FRIBIDI_MASK_NSM = 0x00080000,
FRIBIDI_MASK_BN = 0x00100000,
FRIBIDI_MASK_BS = 0x00200000,
FRIBIDI_MASK_SS = 0x00400000,
FRIBIDI_MASK_WS = 0x00800000,
}
FriBidiMaskType;
typedef enum
{
FRIBIDI_TYPE_LTR = /* Strong left to right */
FRIBIDI_MASK_STRONG + FRIBIDI_MASK_LETTER,
FRIBIDI_TYPE_RTL = /* Right to left characters */
FRIBIDI_MASK_STRONG + FRIBIDI_MASK_LETTER + FRIBIDI_MASK_RTL,
FRIBIDI_TYPE_AL = /* Arabic characters */
FRIBIDI_MASK_STRONG + FRIBIDI_MASK_LETTER +
FRIBIDI_MASK_RTL + FRIBIDI_MASK_ARABIC,
FRIBIDI_TYPE_LRE = /* Left-To-Right embedding */
FRIBIDI_MASK_STRONG + FRIBIDI_MASK_EXPLICIT,
FRIBIDI_TYPE_RLE = /* Right-To-Left embedding */
FRIBIDI_MASK_STRONG + FRIBIDI_MASK_EXPLICIT + FRIBIDI_MASK_RTL,
FRIBIDI_TYPE_LRO = /* Left-To-Right override */
FRIBIDI_MASK_STRONG + FRIBIDI_MASK_EXPLICIT + FRIBIDI_MASK_OVERRIDE,
FRIBIDI_TYPE_RLO = /* Right-To-Left override */
FRIBIDI_MASK_STRONG + FRIBIDI_MASK_EXPLICIT +
FRIBIDI_MASK_RTL + FRIBIDI_MASK_OVERRIDE,
FRIBIDI_TYPE_PDF = /* Pop directional override */
FRIBIDI_MASK_WEAK + FRIBIDI_MASK_EXPLICIT,
FRIBIDI_TYPE_EN = /* European digit */
FRIBIDI_MASK_WEAK + FRIBIDI_MASK_NUMBER,
FRIBIDI_TYPE_AN = /* Arabic digit */
FRIBIDI_MASK_WEAK + FRIBIDI_MASK_NUMBER + FRIBIDI_MASK_ARABIC,
FRIBIDI_TYPE_ES = /* European number separator */
FRIBIDI_MASK_WEAK + FRIBIDI_MASK_NUMSEPTER + FRIBIDI_MASK_ES,
FRIBIDI_TYPE_ET = /* European number terminator */
FRIBIDI_MASK_WEAK + FRIBIDI_MASK_NUMSEPTER + FRIBIDI_MASK_ET,
FRIBIDI_TYPE_CS = /* Common Separator */
FRIBIDI_MASK_WEAK + FRIBIDI_MASK_NUMSEPTER + FRIBIDI_MASK_CS,
FRIBIDI_TYPE_NSM = /* Non spacing mark */
FRIBIDI_MASK_WEAK + FRIBIDI_MASK_NSM,
FRIBIDI_TYPE_BN = /* Boundary neutral */
FRIBIDI_MASK_WEAK + FRIBIDI_MASK_SPACE + FRIBIDI_MASK_BN,
FRIBIDI_TYPE_BS = /* Block separator */
FRIBIDI_MASK_NEUTRAL + FRIBIDI_MASK_SPACE +
FRIBIDI_MASK_SEPARATOR + FRIBIDI_MASK_BS,
FRIBIDI_TYPE_SS = /* Segment separator */
FRIBIDI_MASK_NEUTRAL + FRIBIDI_MASK_SPACE +
FRIBIDI_MASK_SEPARATOR + FRIBIDI_MASK_SS,
FRIBIDI_TYPE_WS = /* Whitespace */
FRIBIDI_MASK_NEUTRAL + FRIBIDI_MASK_SPACE + FRIBIDI_MASK_WS,
FRIBIDI_TYPE_ON = /* Other Neutral */
FRIBIDI_MASK_NEUTRAL,
/* The following are used to identify the paragraph direction,
types L, R, N are not used internally anymore, and recommended to use
LTR, RTL and ON instead, didn't removed because of compatability. */
FRIBIDI_TYPE_L = FRIBIDI_TYPE_LTR,
FRIBIDI_TYPE_R = FRIBIDI_TYPE_RTL,
FRIBIDI_TYPE_N = FRIBIDI_TYPE_ON,
FRIBIDI_TYPE_WL = /* Weak left to right */
FRIBIDI_MASK_WEAK,
FRIBIDI_TYPE_WR = /* Weak right to left */
FRIBIDI_MASK_WEAK + FRIBIDI_MASK_RTL,
/* The following are only used internally */
FRIBIDI_TYPE_SOT = /* Start of text */
FRIBIDI_MASK_SENTINEL,
FRIBIDI_TYPE_EOT = /* End of text */
FRIBIDI_MASK_SENTINEL + FRIBIDI_MASK_RTL,
}
FriBidiCharType;
/* Defining macros for needed queries, It is fully dependent on the
implementation of FriBidiCharType. */
/* Return the direction of the level number, FRIBIDI_TYPE_LTR for even and
FRIBIDI_TYPE_RTL for odds. */
#define FRIBIDI_LEVEL_TO_DIR(lev) (FRIBIDI_TYPE_LTR | (lev & 1))
/* Return the minimum level of the direction, 0 for FRIBIDI_TYPE_LTR and
1 for FRIBIDI_TYPE_RTL and FRIBIDI_TYPE_AL. */
#define FRIBIDI_DIR_TO_LEVEL(dir) (dir & 1)
/* Is right to left? */
#define FRIBIDI_IS_RTL(p) ((P) & FRIBIDI_MASK_RTL)
/* Is arabic? */
#define FRIBIDI_IS_ARABIC(p) ((p) & FRIBIDI_MASK_ARABIC)
/* Is strong? */
#define FRIBIDI_IS_STRONG(p) ((p) & FRIBIDI_MASK_STRONG)
/* Is weak? */
#define FRIBIDI_IS_WEAK(p) ((p) & FRIBIDI_MASK_WEAK)
/* Is neutral? */
#define FRIBIDI_IS_NEUTRAL(p) ((p) & FRIBIDI_MASK_NEUTRAL)
/* Is sentinel? */
#define FRIBIDI_IS_SENTINEL(p) ((p) & FRIBIDI_MASK_SENTINEL)
/* Is letter: L, R, AL? */
#define FRIBIDI_IS_LETTER(p) ((p) & FRIBIDI_MASK_LETTER)
/* Is number: EN, AN? */
#define FRIBIDI_IS_NUMBER(p) ((p) & FRIBIDI_MASK_NUMBER)
/* Is number separator or terminator: ES, ET, CS? */
#define FRIBIDI_IS_NUMBER_SEPARATOR_OR_TERMINATOR(p) \
((p) & FRIBIDI_MASK_NUMSEPTER)
/* Is space: BN, BS, SS, WS? */
#define FRIBIDI_IS_SPACE(p) ((p) & FRIBIDI_MASK_SPACE)
/* Is explicit mark: LRE, RLE, LRO, RLO, PDF? */
#define FRIBIDI_IS_EXPLICIT(p) ((p) & FRIBIDI_MASK_EXPLICIT)
/* Is test separator: BS, SS? */
#define FRIBIDI_IS_SEPARATOR(p) ((p) & FRIBIDI_MASK_SEPARATOR)
/* Is explicit override: LRO, RLO? */
#define FRIBIDI_IS_OVERRIDE(p) ((p) & FRIBIDI_MASK_OVERRIDE)
/* Some more: */
/* Is left to right letter: LTR? */
#define FRIBIDI_IS_LTR_LETTER(p) \
((p) & (FRIBIDI_MASK_LETTER | FRIBIDI_MASK_RTL) == FRIBIDI_MASK_LETTER)
/* Is right to left letter: RTL, AL? */
#define FRIBIDI_IS_RTL_LETTER(p) \
((p) & (FRIBIDI_MASK_LETTER | FRIBIDI_MASK_RTL) == \
(FRIBIDI_MASK_LETTER | FRIBIDI_MASK_RTL))
/* Is ES or CS: ES, CS? */
#define FRIBIDI_IS_ES_OR_CS(p) \
((p) & (FRIBIDI_MASK_ES | FRIBIDI_MASK_CS))
/* Is explicit or BN: LRE, RLE, LRO, RLO, PDF, BN? */
#define FRIBIDI_IS_EXPLICIT_OR_BN(p) \
((p) & (FRIBIDI_MASK_EXPLICIT | FRIBIDI_MASK_BN))
/* Is explicit or separator or BN or WS: LRE, RLE, LRO, RLO, PDF, BS, SS, BN, WS? */
#define FRIBIDI_IS_EXPLICIT_OR_SEPARATOR_OR_BN_OR_WS(p) \
((p) & (FRIBIDI_MASK_EXPLICIT | FRIBIDI_MASK_SEPARATOR | \
FRIBIDI_MASK_BN | FRIBIDI_MASK_WS))
/* Define some conversions. */
/* Change numbers:EN, AN to RTL. */
#define FRIBIDI_CHANGE_NUMBER_TO_RTL(p) \
(FRIBIDI_IS_NUMBER(p) ? FRIBIDI_TYPE_RTL : (p))
/* Override status of an explicit mark: LRO->LTR, RLO->RTL, otherwise->ON. */
#define FRIBIDI_EXPLICIT_TO_OVERRIDE_DIR(p) \
(FRIBIDI_IS_OVERRIDE(p) ? FRIBIDI_LEVEL_TO_DIR(FRIBIDI_DIR_TO_LEVEL(p)) : \
FRIBIDI_TYPE_ON)
gchar fribidi_char_from_type (FriBidiCharType c);
gchar *fribidi_type_name (FriBidiCharType c);
/* Define character types that fribidi_tables.i uses. if MEM_OPTIMIZED
defined, then define them to be 0, 1, 2, ... and then in
fribidi_get_type.c map them on FriBidiCharType-s, else define them to
be equal to FribidiCharType-s */
#ifdef MEM_OPTIMIZED
#define _FRIBIDI_PROP(type) FRIBIDI_PROP_TYPE_##type
typedef guint8 FriBidiPropCharType;
#else
#define _FRIBIDI_PROP(type) FRIBIDI_PROP_TYPE_##type = FRIBIDI_TYPE_##type
typedef FriBidiCharType FriBidiPropCharType;
#endif
enum
{
_FRIBIDI_PROP (LTR), /* Strong left to right */
_FRIBIDI_PROP (RTL), /* Right to left characters */
_FRIBIDI_PROP (AL), /* Arabic characters */
_FRIBIDI_PROP (LRE), /* Left-To-Right embedding */
_FRIBIDI_PROP (RLE), /* Right-To-Left embedding */
_FRIBIDI_PROP (LRO), /* Left-To-Right override */
_FRIBIDI_PROP (RLO), /* Right-To-Left override */
_FRIBIDI_PROP (PDF), /* Pop directional override */
_FRIBIDI_PROP (EN), /* European digit */
_FRIBIDI_PROP (AN), /* Arabic digit */
_FRIBIDI_PROP (ES), /* European number separator */
_FRIBIDI_PROP (ET), /* European number terminator */
_FRIBIDI_PROP (CS), /* Common Separator */
_FRIBIDI_PROP (NSM), /* Non spacing mark */
_FRIBIDI_PROP (BN), /* Boundary neutral */
_FRIBIDI_PROP (BS), /* Block separator */
_FRIBIDI_PROP (SS), /* Segment separator */
_FRIBIDI_PROP (WS), /* Whitespace */
_FRIBIDI_PROP (ON), /* Other Neutral */
_FRIBIDI_PROP (WL), /* Weak left to right */
_FRIBIDI_PROP (WR), /* Weak right to left */
_FRIBIDI_PROP (SOT), /* Start of text */
_FRIBIDI_PROP (EOT), /* End of text */
};
#undef _FRIBIDI_PROP
/* The following type is used by fribidi_utils */
typedef struct
{
int length;
void *attribute;
}
FriBidiRunType;
/* TBD: The following should be configuration parameters, once we can
figure out how to make configure set them... */
#ifndef FRIBIDI_MAX_STRING_LENGTH
#define FRIBIDI_MAX_STRING_LENGTH 65535
#endif
FriBidiCharType _pango_fribidi_get_type(FriBidiChar uch);
#endif
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