1 files changed, 90 insertions, 0 deletions
diff --git a/libempathy-gtk/empathy-theme-utils.c b/libempathy-gtk/empathy-theme-utils.c
new file mode 100644
index 000000000..56b758e2a
--- /dev/null
+++ b/libempathy-gtk/empathy-theme-utils.c
@@ -0,0 +1,90 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ * Copyright (C) 2007 Imendio AB
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <config.h>
+
+#include <gtk/gtktexttag.h>
+
+#include "empathy-theme-utils.h"
+
+void
+empathy_theme_utils_ensure_tag_by_name (GtkTextBuffer *buffer, const gchar *name)
+{
+	GtkTextTagTable *table;
+	GtkTextTag      *tag;
+
+	table = gtk_text_buffer_get_tag_table (buffer);
+	tag = gtk_text_tag_table_lookup (table, name);
+
+	if (!tag) {
+		gtk_text_buffer_create_tag (buffer,
+					    name,
+					    NULL);
+	}
+}
+
+GtkTextTag *
+empathy_theme_utils_init_tag_by_name (GtkTextTagTable *table, const gchar *name)
+{
+	GtkTextTag *tag;
+
+	tag = gtk_text_tag_table_lookup (table, name);
+
+	if (!tag) {
+		return gtk_text_tag_new (name);
+	}
+
+	/* 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);
+
+	return tag;
+}
+
+void
+empathy_theme_utils_add_tag (GtkTextTagTable *table, GtkTextTag *tag)
+{
+	gchar      *name;
+	GtkTextTag *check_tag;
+
+	g_object_get (tag, "name", &name, NULL);
+	check_tag = gtk_text_tag_table_lookup (table, name);
+	g_free (name);
+	if (check_tag) {
+		return;
+	}
+
+	gtk_text_tag_table_add (table, tag);
+
+	g_object_unref (tag);
+}
+