diff -r 7c8bed80301f -r 87017fcbad83 src/Pure/PIDE/protocol.ML
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/PIDE/protocol.ML	Thu Dec 01 14:29:14 2011 +0100
@@ -0,0 +1,84 @@
+(*  Title:      Pure/PIDE/protocol.ML
+    Author:     Makarius
+
+Protocol message formats for interactive proof documents.
+*)
+
+structure Protocol: sig end =
+struct
+
+val _ =
+  Isabelle_Process.add_command "Document.define_command"
+    (fn [id, name, text] =>
+      Document.change_state (Document.define_command (Document.parse_id id) name text));
+
+val _ =
+  Isabelle_Process.add_command "Document.cancel_execution"
+    (fn [] => ignore (Document.cancel_execution (Document.state ())));
+
+val _ =
+  Isabelle_Process.add_command "Document.update_perspective"
+    (fn [old_id_string, new_id_string, name, ids_yxml] => Document.change_state (fn state =>
+      let
+        val old_id = Document.parse_id old_id_string;
+        val new_id = Document.parse_id new_id_string;
+        val ids = YXML.parse_body ids_yxml
+          |> let open XML.Decode in list int end;
+
+        val _ = Future.join_tasks (Document.cancel_execution state);
+      in
+        state
+        |> Document.update_perspective old_id new_id name ids
+        |> Document.execute new_id
+      end));
+
+val _ =
+  Isabelle_Process.add_command "Document.update"
+    (fn [old_id_string, new_id_string, edits_yxml] => Document.change_state (fn state =>
+      let
+        val old_id = Document.parse_id old_id_string;
+        val new_id = Document.parse_id new_id_string;
+        val edits =
+          YXML.parse_body edits_yxml |>
+            let open XML.Decode in
+              list (pair string
+                (variant
+                 [fn ([], []) => Document.Clear,
+                  fn ([], a) => Document.Edits (list (pair (option int) (option int)) a),
+                  fn ([], a) =>
+                    Document.Header
+                      (Exn.Res
+                        (triple (pair string string) (list string) (list (pair string bool)) a)),
+                  fn ([a], []) => Document.Header (Exn.Exn (ERROR a)),
+                  fn (a, []) => Document.Perspective (map int_atom a)]))
+            end;
+
+        val running = Document.cancel_execution state;
+        val (assignment, state1) = Document.update old_id new_id edits state;
+        val _ = Future.join_tasks running;
+        val _ =
+          Output.raw_message Isabelle_Markup.assign_execs
+            ((new_id, assignment) |>
+              let open XML.Encode
+              in pair int (pair (list (pair int (option int))) (list (pair string (option int)))) end
+              |> YXML.string_of_body);
+        val state2 = Document.execute new_id state1;
+      in state2 end));
+
+val _ =
+  Isabelle_Process.add_command "Document.remove_versions"
+    (fn [versions_yxml] => Document.change_state (fn state =>
+      let
+        val versions =
+          YXML.parse_body versions_yxml |>
+            let open XML.Decode in list int end;
+        val state1 = Document.remove_versions versions state;
+        val _ = Output.raw_message Isabelle_Markup.removed_versions versions_yxml;
+      in state1 end));
+
+val _ =
+  Isabelle_Process.add_command "Document.invoke_scala"
+    (fn [id, tag, res] => Invoke_Scala.fulfill_method id tag res);
+
+end;
+