X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fmatita%2FmatitaMisc.mli;h=afaa631a08f01646e773aa505301c710db2718d3;hb=ef9ec8cb57d15426a96fe40d056eb07804753bb9;hp=f8e8ee40c0c98d533fb996c83f366d8c9c5fe622;hpb=142d3076f2a4dc17d9045c2bba4d4b01eddfd008;p=helm.git

diff --git a/helm/matita/matitaMisc.mli b/helm/matita/matitaMisc.mli
index f8e8ee40c..afaa631a0 100644
--- a/helm/matita/matitaMisc.mli
+++ b/helm/matita/matitaMisc.mli
@@ -38,3 +38,31 @@ val is_proof_object: string -> bool
   * it *)
 val append_phrase_sep: string -> string
 
+val strip_trailing_blanks: string -> string
+
+  (** Gdome.element of a MathML document whose rendering should be blank. Used
+  * by cicBrowser to render "about:blank" document *)
+val empty_mathml: Gdome.element
+
+exception History_failure
+
+type 'a memento
+
+class type ['a] history =
+  object ('b)
+    method add : 'a -> unit
+    method next : 'a        (** @raise History_failure *)
+    method previous : 'a    (** @raise History_failure *)
+    method load: 'a memento -> unit
+    method save: 'a memento
+  end
+
+  (** shell like history: new items added at the end of the history
+  * @param size maximum history size *)
+class shell_history : int -> [string] history
+
+  (** browser like history: new items added at the current point of the history
+  * @param size maximum history size
+  * @param first element in history (this history is never empty) *)
+class ['a] browser_history: ?memento:'a memento -> int -> 'a -> ['a] history
+