Bring back ephy_string_shorten.

2005-10-10  Christian Persch  <chpe@cvs.gnome.org>

	* lib/ephy-string.c: (ephy_string_blank_chr),
	(ephy_string_shorten):
	* lib/ephy-string.h:

	Bring back ephy_string_shorten.

	* src/ephy-tab.c: (ephy_tab_file_monitor_cb), (ephy_tab_set_title):

	Shorten overlong tab titles, hard. Increase reload delay slightly.
	Strip whitespace from tab title before determining if it's empty.

2 files changed, 55 insertions, 3 deletions

diff --git a/lib/ephy-string.c b/lib/ephy-string.c
index 2d53c25b5..f996a7fe3 100644
--- a/lib/ephy-string.c
+++ b/lib/ephy-string.c
@@ -27,6 +27,8 @@
 #include <stdlib.h>
 #include <glib.h>
 
+#define ELLIPSIS "\xe2\x80\xa6"
+
 gboolean
 ephy_string_to_int (const char *string, gulong *integer)
 {
@@ -85,3 +87,50 @@ ephy_string_blank_chr (char *source)
 
         return source;
 }
+
+/**
+ * ephy_string_shorten: shortens a string
+ * @str: the string to shorten, in UTF-8
+ * @target_length: the length of the shortened string (in characters)
+ * 
+ * If @str is already short enough, it is returned. Otherwise a new string
+ * is allocated and @str is consumed.
+ * 
+ * Return value: a newly allocated string, not longer than target_length
+ * characters.
+ */
+char *
+ephy_string_shorten (const char *str,
+		     gsize target_length)
+{
+        char *new_str;
+        glong actual_length;
+        gulong bytes;
+
+	g_return_val_if_fail (target_length > 0, NULL);
+
+        if (!str) return NULL;
+
+ 	/* FIXME: this function is a big mess. While it is utf-8 safe now,
+	 * it can still split a sequence of combining characters.
+	 */
+
+        actual_length = g_utf8_strlen (str, -1);
+
+        /* if the string is already short enough, or if it's too short for
+         * us to shorten it, return a new copy */
+        if (actual_length <= target_length) return g_strdup (str);
+
+        /* create string */
+        bytes = GPOINTER_TO_UINT (g_utf8_offset_to_pointer (str, target_length - 1) - str);
+
+        new_str = g_new (gchar, bytes + strlen(ELLIPSIS) + 1);
+
+        strncpy (new_str, str, bytes);
+        strncpy (new_str + bytes, ELLIPSIS, strlen (ELLIPSIS));
+	new_str[bytes + strlen (ELLIPSIS)] = '\0';
+
+	g_free (str);
+
+        return new_str;
+}
diff --git a/lib/ephy-string.h b/lib/ephy-string.h
index 36e23d1c3..86ab9eafc 100644
--- a/lib/ephy-string.h
+++ b/lib/ephy-string.h
@@ -25,10 +25,13 @@
 
 G_BEGIN_DECLS
 
-gboolean	 ephy_string_to_int			(const char *string,
-							 gulong *integer);
+gboolean  ephy_string_to_int	(const char *string,
+				 gulong *integer);
 
-char		*ephy_string_blank_chr			(char *source);
+char	 *ephy_string_blank_chr	(char *source);
+
+char	 *ephy_string_shorten	(const char *str,
+				 gsize target_length);
 
 G_END_DECLS