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/**
* @internal
* @addtogroup Evas_Utils
*
* @{
*/
/**
* @internal
* @defgroup Evas_Script Evas Script (language) utility functions
*
* This set of functions and types helps evas handle scripts correctly.
* @todo Document types, structures and macros.
*
* @{
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <locale.h>
#ifdef ENABLE_NLS
# include <libintl.h>
#else
# define dgettext(domain, x) (x)
#endif
#ifdef HAVE_EVIL
# include <Evil.h>
#endif
#include <Eina.h>
#include "evas_language_utils.h"
#include "evas_bidi_utils.h" /* Used for splitting according to bidi */
#include "../evas_font_ot.h" /* Used for harfbuzz info */
#ifdef USE_HARFBUZZ
# include <hb.h>
#endif
#include "evas_script_table.h"
/* The given 'script' of a character is an EXPLICIT_SCRIPT if it is not one of
* the three special values: INHERITED, COMMON and UNKNOWN.
* See http://www.unicode.org/reports/tr24 */
#define EXPLICIT_SCRIPT(script) \
(((script) != EVAS_SCRIPT_UNKNOWN) && ((script) > EVAS_SCRIPT_INHERITED))
static char lang[6]; /* FIXME: Maximum length I know about */
static char lang_full[32];
static Evas_BiDi_Direction lang_dir = EVAS_BIDI_DIRECTION_NEUTRAL;
static Evas_Script_Type
_evas_common_language_char_script_search(Eina_Unicode unicode)
{
int min = 0;
int max = (sizeof(_evas_script_slow_table) /
sizeof(_evas_script_slow_table[0])) - 1;
int mid;
do
{
mid = (min + max) / 2;
if (unicode < _evas_script_slow_table[mid].start)
max = mid - 1;
else if (unicode >= _evas_script_slow_table[mid].start +
_evas_script_slow_table[mid].len)
min = mid + 1;
else
return _evas_script_slow_table[mid].script;
}
while (min <= max);
return EVAS_SCRIPT_UNKNOWN;
}
Evas_Script_Type
evas_common_language_char_script_get(Eina_Unicode _unicode)
{
uint32_t unicode = _unicode;
if (unicode < EVAS_SCRIPT_DIRECT_TABLE_LIMIT)
return _evas_script_fast_table[unicode];
return _evas_common_language_char_script_search(unicode);
}
int
evas_common_language_script_end_of_run_get(const Eina_Unicode *str,
const Evas_BiDi_Paragraph_Props *bidi_props, size_t start, int len)
{
/* FIXME: Use the standard segmentation instead */
Evas_Script_Type first = EVAS_SCRIPT_UNKNOWN;
int i;
/* Find the first EXPLICIT_SCRIPT (see documented macro above), and
* use it to determine the script run */
for (i = 0 ; (i < len) && !EXPLICIT_SCRIPT(first) ; i++, str++)
{
first = evas_common_language_char_script_get(*str);
}
/* At this point either (i == len) or 'first' is an EXPLICIT_SCRIPT. */
/* NOTE: ++i, ++str is to start at the character after 'first', if exists. */
for ( ; i < len ; ++i, ++str)
{
Evas_Script_Type tmp = evas_common_language_char_script_get(*str);
if (EXPLICIT_SCRIPT(tmp) && (tmp != first))
{
break;
}
}
#ifdef BIDI_SUPPORT
{
int bidi_end;
bidi_end = evas_bidi_end_of_run_get(bidi_props, start, len);
if (bidi_end > 0)
{
i = (i < bidi_end) ? i : bidi_end;
}
}
#else
(void) bidi_props;
(void) start;
#endif
return (i < len) ? i : 0;
}
Evas_Script_Type
evas_common_language_script_type_get(const Eina_Unicode *str, size_t len)
{
Evas_Script_Type script = EVAS_SCRIPT_COMMON;
const Eina_Unicode *end = str + len;
for ( ; (str < end) && !EXPLICIT_SCRIPT(script) ; str++)
{
script = evas_common_language_char_script_get(*str);
}
return script;
}
const char *
evas_common_language_from_locale_get(void)
{
if (*lang) return lang;
const char *locale;
locale = setlocale(LC_MESSAGES, NULL);
if (locale && *locale)
{
char *itr;
const size_t size = sizeof(lang);
strncpy(lang, locale, size - 1);
lang[size - 1] = '\0';
itr = lang;
while (*itr)
{
if (*itr == '_')
{
*itr = '\0';
}
itr++;
}
return lang;
}
return "";
}
const char *
evas_common_language_from_locale_full_get(void)
{
if (*lang_full) return lang_full;
const char *locale;
locale = setlocale(LC_MESSAGES, NULL);
if (locale && *locale)
{
const size_t size = sizeof(lang_full);
size_t i;
for (i = 0 ; locale[i] ; i++)
{
const char c = locale[i];
if ((c == '.') || (c == '@') || (c == ' ')) /* Looks like en_US.UTF8 or de_DE@euro or aa_ER UTF-8*/
break;
}
if (i >= size)
{
i = size - 1;
}
strncpy(lang_full, locale, i);
lang_full[i] = '\0';
return lang_full;
}
return "";
}
Evas_BiDi_Direction
evas_common_language_direction_get(void)
{
if (lang_dir == EVAS_BIDI_DIRECTION_NEUTRAL)
{
const char *dir_str = dgettext(PACKAGE, "default:LTR");
if (dir_str && !strcmp(dir_str, "default:RTL"))
lang_dir = EVAS_BIDI_DIRECTION_RTL;
else
lang_dir = EVAS_BIDI_DIRECTION_LTR;
}
return lang_dir;
}
void
evas_common_language_reinit(void)
{
*lang = *lang_full = '\0';
lang_dir = EVAS_BIDI_DIRECTION_NEUTRAL;
}
/*
* @}
*/
/*
* @}
*/
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