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Diffstat (limited to 'modules/thai/thai-lang.c')
| -rw-r--r-- | modules/thai/thai-lang.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/modules/thai/thai-lang.c b/modules/thai/thai-lang.c new file mode 100644 index 00000000..37c1a2c8 --- /dev/null +++ b/modules/thai/thai-lang.c @@ -0,0 +1,139 @@ +/* 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; +} + |