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/* Pango
* arabic-fc.h:
*
* Copyright (C) 2006 Red Hat Software
* Author: Behdad Esfahbod <besfahbo@redhat.com>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <string.h>
#include "arabic-ot.h"
#include "pango-engine.h"
#include "pango-break.h"
/* No extra fields needed */
typedef PangoEngineLang ArabicEngineLang;
typedef PangoEngineLangClass ArabicEngineLangClass ;
#define SCRIPT_ENGINE_NAME "ArabicScriptEngineLang"
#define RENDER_TYPE PANGO_RENDER_TYPE_NONE
static PangoEngineScriptInfo arabic_scripts[] = {
{ PANGO_SCRIPT_ARABIC, "*" },
};
static PangoEngineInfo script_engines[] = {
{
SCRIPT_ENGINE_NAME,
PANGO_ENGINE_TYPE_LANG,
RENDER_TYPE,
arabic_scripts, G_N_ELEMENTS(arabic_scripts)
}
};
static void
arabic_engine_break (PangoEngineLang *engine,
const char *text,
int length,
PangoAnalysis *analysis,
PangoLogAttr *attrs,
int attrs_len)
{
int i;
const char *p;
gunichar prev_wc, this_wc;
/* See http://bugzilla.gnome.org/show_bug.cgi?id=350132 for issues this
* module tries to solve.
*/
for (p = text, i = 0, prev_wc = 0;
p < text + length;
p = g_utf8_next_char (p), i++, prev_wc = this_wc)
{
this_wc = g_utf8_get_char (p);
/*
* Unset backspace_deletes_character for various combinations:
*/
if (G_UNLIKELY (
this_wc == 0x0622 /* ARABIC LETTER ALEF WITH MADDA ABOVE */ ||
(prev_wc == 0x0627 /* ARABIC LETTER ALEF */ && this_wc == 0x0653 /* ARABIC MADDAH ABOVE */)
))
attrs[i+1].backspace_deletes_character = FALSE;
}
}
static void
arabic_engine_lang_class_init (PangoEngineLangClass *class)
{
class->script_break = arabic_engine_break;
}
PANGO_ENGINE_LANG_DEFINE_TYPE (ArabicEngineLang, arabic_engine_lang,
arabic_engine_lang_class_init, NULL)
void
PANGO_MODULE_ENTRY(init) (GTypeModule *module)
{
arabic_engine_lang_register_type (module);
}
void
PANGO_MODULE_ENTRY(exit) (void)
{
}
void
PANGO_MODULE_ENTRY(list) (PangoEngineInfo **engines,
int *n_engines)
{
*engines = script_engines;
*n_engines = G_N_ELEMENTS (script_engines);
}
PangoEngine *
PANGO_MODULE_ENTRY(create) (const char *id)
{
if (!strcmp (id, SCRIPT_ENGINE_NAME))
return g_object_new (arabic_engine_lang_type, NULL);
else
return NULL;
}
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