Simplify chat theme system

svn path=/trunk/; revision=507

1 files changed, 48 insertions, 0 deletions

diff --git a/libempathy-gtk/empathy-ui-utils.c b/libempathy-gtk/empathy-ui-utils.c
index 6f1b5a857..2989ce2ac 100644
--- a/libempathy-gtk/empathy-ui-utils.c
+++ b/libempathy-gtk/empathy-ui-utils.c
@@ -1376,3 +1376,51 @@ empathy_toggle_button_set_state_quietly (GtkWidget *widget,
 	g_signal_handlers_unblock_by_func (widget, callback, user_data);
 }
 
+GtkTextTag *
+empathy_text_buffer_tag_set (GtkTextBuffer *buffer,
+			     const gchar   *tag_name,
+			     const gchar   *first_property_name,
+			     ...)
+{
+	GtkTextTagTable *table;
+	GtkTextTag      *tag;
+
+	g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
+	g_return_val_if_fail (tag_name != NULL, NULL);
+
+	table = gtk_text_buffer_get_tag_table (buffer);
+	tag = gtk_text_tag_table_lookup (table, tag_name);
+
+	if (!tag) {
+		tag = gtk_text_tag_new (tag_name);
+		gtk_text_tag_table_add (table, tag);
+		g_object_unref (tag);
+	} else {
+		/* Clear the old values so that we don't affect the new theme. */
+		g_object_set (tag,
+			      "background-set", FALSE,
+			      "foreground-set", FALSE,
+			      "invisible-set", FALSE,
+			      "justification-set", FALSE,
+			      "paragraph-background-set", FALSE,
+			      "pixels-above-lines-set", FALSE,
+			      "pixels-below-lines-set", FALSE,
+			      "rise-set", FALSE,
+			      "scale-set", FALSE,
+			      "size-set", FALSE,
+			      "style-set", FALSE,
+			      "weight-set", FALSE,
+			      NULL);
+	}
+
+	if (first_property_name) {
+		va_list list;
+
+		va_start (list, first_property_name);
+		g_object_set_valist (G_OBJECT (tag), first_property_name, list);
+		va_end (list);
+	}
+
+	return tag;
+}
+