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/* Pango
* thai-lang.c:
*
* Copyright (C) 2003 Theppitak Karoonboonyanan <thep@linux.thai.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include <glib.h>
#include <pango/pango-engine.h>
#include <pango/pango-break.h>
#include <thai/thwchar.h>
#include <thai/thbrk.h>
/* No extra fields needed */
typedef PangoEngineLang ThaiEngineLang;
typedef PangoEngineLangClass ThaiEngineLangClass;
#define SCRIPT_ENGINE_NAME "ThaiScriptEngineLang"
static PangoEngineScriptInfo thai_scripts[] = {
{ PANGO_SCRIPT_THAI, "*" }
};
static PangoEngineInfo script_engines[] = {
{
SCRIPT_ENGINE_NAME,
PANGO_ENGINE_TYPE_LANG,
PANGO_RENDER_TYPE_NONE,
thai_scripts, G_N_ELEMENTS(thai_scripts)
}
};
static thchar_t *
utf8_to_tis (const char *text, int len)
{
thchar_t *tis_text;
thchar_t *tis_p;
const char *text_p;
if (len < 0)
len = strlen (text);
tis_text = g_new (thchar_t, g_utf8_strlen (text, len) + 1);
if (!tis_text)
return NULL;
tis_p = tis_text;
for (text_p = text; text_p < text + len; text_p = g_utf8_next_char (text_p))
*tis_p++ = th_uni2tis (g_utf8_get_char (text_p));
*tis_p = '\0';
return tis_text;
}
static void
thai_engine_break (PangoEngineLang *engine,
const char *text,
int len,
PangoAnalysis *analysis,
PangoLogAttr *attrs,
int attrs_len)
{
thchar_t *tis_text;
tis_text = utf8_to_tis (text, len);
if (tis_text)
{
int brk_len = strlen ((const char*)tis_text) + 1;
int *brk_pnts = g_new (int, brk_len);
int brk_n;
int i;
/* find line break positions */
brk_n = th_brk (tis_text, brk_pnts, brk_len);
for (i = 0; i < brk_n; i++)
{
attrs[brk_pnts[i]].is_line_break = TRUE;
attrs[brk_pnts[i]].is_word_start = TRUE;
attrs[brk_pnts[i]].is_word_end = TRUE;
}
g_free (brk_pnts);
g_free (tis_text);
}
}
static void
thai_engine_lang_class_init (PangoEngineLangClass *class)
{
class->script_break = thai_engine_break;
}
PANGO_ENGINE_LANG_DEFINE_TYPE (ThaiEngineLang, thai_engine_lang,
thai_engine_lang_class_init, NULL);
void
PANGO_MODULE_ENTRY(init) (GTypeModule *module)
{
thai_engine_lang_register_type (module);
}
void
PANGO_MODULE_ENTRY(exit) (void)
{
}
void
PANGO_MODULE_ENTRY(list) (PangoEngineInfo **engines, gint *n_engines)
{
*engines = script_engines;
*n_engines = G_N_ELEMENTS (script_engines);
}
/* Load a particular engine given the ID for the engine
*/
PangoEngine *
PANGO_MODULE_ENTRY(create) (const char *id)
{
if (!strcmp (id, SCRIPT_ENGINE_NAME))
return g_object_new (thai_engine_lang_type, NULL);
else
return NULL;
}
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