1 files changed, 138 insertions, 0 deletions
diff --git a/lib/ephy-langs.c b/lib/ephy-langs.c
index ff05c34e1..bf86010bf 100644
--- a/lib/ephy-langs.c
+++ b/lib/ephy-langs.c
@@ -24,6 +24,8 @@
 
 #include <glib/gi18n.h>
 
+#include <string.h>
+
 static const EphyFontsLanguageInfo font_languages [] =
 {
 	{ N_("Arabic"),					"ar" },
@@ -57,3 +59,139 @@ ephy_font_n_languages (void)
 {
 	return n_font_languages;
 }
+
+/* sanitise the languages list according to the rules for HTTP accept-language
+ * in RFC 2616, Sect. 14.4
+ */
+void
+ephy_langs_sanitise (GArray *array)
+{
+	char *lang1, *lang2;
+	int i, j;
+
+	/* if we have 'xy-ab' in list but not 'xy', append 'xy' */
+	for (i = 0; i < array->len; i++)
+	{
+		gboolean found = FALSE;
+		char *dash, *prefix;
+
+		lang1 = (char *) g_array_index (array,char *, i);
+
+		dash = strchr (lang1, '-');
+		if (dash == NULL) continue;
+
+		for (j = i + 1; j < array->len; j++)
+		{
+			lang2 = (char *) g_array_index (array, char *, j);
+			if (strchr (lang2, '-') == NULL &&
+			    g_str_has_prefix (lang1, lang2))
+			{
+				found = TRUE;
+			}
+		}
+
+		if (found == FALSE)
+		{
+			prefix = g_strndup (lang1, dash - lang1);
+			g_array_append_val (array, prefix);
+		}
+	}
+
+	/* uniquify */
+	for (i = 0; i < array->len - 1; i++)
+	{
+		for (j = array->len - 1; j > i; j--)
+		{
+			lang1 = (char *) g_array_index (array,char *, i);
+			lang2 = (char *) g_array_index (array, char *, j);
+
+			if (strcmp (lang1, lang2) == 0)
+			{
+				g_array_remove_index (array, j);
+				g_free (lang2);
+			}
+		}
+	}
+
+	/* move 'xy' code behind all 'xy-ab' codes */
+	for (i = array->len - 2; i >= 0; i--)
+	{
+		for (j = array->len - 1; j > i; j--)
+		{
+			lang1 = (char *) g_array_index (array, char *, i);
+			lang2 = (char *) g_array_index (array, char *, j);
+
+			if (strchr (lang1, '-') == NULL &&
+			    strchr (lang2, '-') != NULL &&
+			    g_str_has_prefix (lang2, lang1))
+			{
+				g_array_insert_val (array, j + 1, lang1);
+				g_array_remove_index (array, i);
+				break;
+			}
+		}
+	}
+}
+
+void
+ephy_langs_append_languages (GArray *array)
+{
+	const char * const * languages;
+	const char *system_lang;
+	char *lang;
+	int i;
+
+	/**
+	* This is a comma separated list of language ranges, as specified
+	* by RFC 2616, 14.4.
+	* Always include the basic language code last.
+	*
+	* Examples:
+	* "pt"    translation: "pt"
+	* "pt_BR" translation: "pt-br,pt"
+	* "zh_CN" translation: "zh-cn,zh"
+	* "zh_HK" translation: "zh-hk,zh" or maybe "zh-hk,zh-tw,zh"
+	*/
+	system_lang = _("system-language");
+
+	/* FIXME: use system_language when given, instead of g_get_language_names () ? */
+	languages = g_get_language_names ();
+	g_return_if_fail (languages != NULL);
+
+	/* FIXME: maybe just use the first, instead of all of them? */
+	for (i = 0; languages[i] != NULL; i++)
+	{
+
+		if (strstr (languages[i], ".") == 0 &&
+		    strstr (languages[i], "@") == 0 &&
+		    strcmp (languages[i], "C") != 0)
+		{
+			/* change to lowercase and '_' to '-' */
+			lang = g_strdelimit (g_ascii_strdown
+						(languages[i], -1), "_", '-');
+
+			g_array_append_val (array, lang);
+		}
+	}
+
+	/* Fallback: add "en" if list is empty */
+	if (array->len == 0)
+	{
+		lang = g_strdup ("en");
+		g_array_append_val (array, lang);
+	}
+}
+
+char **
+ephy_langs_get_languages (void)
+{
+	GArray *array;
+
+	array = g_array_new (TRUE, FALSE, sizeof (char *));
+
+	ephy_langs_append_languages (array);
+
+	ephy_langs_sanitise (array);
+
+	return (char **) g_array_free (array, FALSE);
+}