1 files changed, 20 insertions, 0 deletions
diff --git a/filter/rule-editor.h b/filter/rule-editor.h
index b981a61b65..f054023c87 100644
--- a/filter/rule-editor.h
+++ b/filter/rule-editor.h
@@ -30,6 +30,7 @@
 
 typedef struct _RuleEditor	RuleEditor;
 typedef struct _RuleEditorClass	RuleEditorClass;
+typedef struct _RuleEditorUndo	RuleEditorUndo;
 
 struct _RuleEditor {
 	GnomeDialog parent;
@@ -43,6 +44,9 @@ struct _RuleEditor {
 	
 	char *source;
 
+	struct _RuleEditorUndo *undo_log;	/* cancel/undo log */
+	unsigned int undo_active:1; /* we're performing undo */
+
 	struct _RuleEditorPrivate *priv;
 };
 
@@ -58,6 +62,22 @@ struct _RuleEditorClass {
 	/* signals */
 };
 
+enum {
+	RULE_EDITOR_LOG_EDIT,
+	RULE_EDITOR_LOG_ADD,
+	RULE_EDITOR_LOG_REMOVE,
+	RULE_EDITOR_LOG_RANK,
+};
+
+struct _RuleEditorUndo {
+	struct _RuleEditorUndo *next;
+
+	unsigned int type;
+	struct _FilterRule *rule;
+	int rank;
+	int newrank;
+};
+
 struct _GladeXML;
 struct _RuleContext;