src/Pure/PIDE/isar_document.ML
author wenzelm
Fri, 02 Sep 2011 21:48:27 +0200
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child 44673 2fa51ac191bc
permissions -rw-r--r--
raw message function "assign_execs" avoids full overhead of decoding and caching message body;
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(*  Title:      Pure/PIDE/isar_document.ML
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    Author:     Makarius
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Protocol message formats for interactive Isar documents.
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*)
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structure Isar_Document: sig end =
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struct
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val _ =
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  Isabelle_Process.add_command "Isar_Document.define_command"
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    (fn [id, name, text] =>
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      Document.change_state (Document.define_command (Document.parse_id id) name text));
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val _ =
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  Isabelle_Process.add_command "Isar_Document.cancel_execution"
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    (fn [] => ignore (Document.cancel_execution (Document.state ())));
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val _ =
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  Isabelle_Process.add_command "Isar_Document.update_perspective"
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    (fn [old_id_string, new_id_string, name, ids_yxml] => Document.change_state (fn state =>
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      let
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        val old_id = Document.parse_id old_id_string;
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        val new_id = Document.parse_id new_id_string;
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        val ids = YXML.parse_body ids_yxml
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          |> let open XML.Decode in list int end;
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        val _ = Future.join_tasks (Document.cancel_execution state);
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      in
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        state
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        |> Document.update_perspective old_id new_id name ids
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        |> Document.execute new_id
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      end));
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val _ =
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  Isabelle_Process.add_command "Isar_Document.update"
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    (fn [old_id_string, new_id_string, edits_yxml] => Document.change_state (fn state =>
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      let
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        val old_id = Document.parse_id old_id_string;
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        val new_id = Document.parse_id new_id_string;
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        val edits =
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          YXML.parse_body edits_yxml |>
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            let open XML.Decode in
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              list (pair string
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                (variant
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                 [fn ([], []) => Document.Clear,
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                  fn ([], a) => Document.Edits (list (pair (option int) (option int)) a),
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                  fn ([], a) =>
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                    Document.Header
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                      (Exn.Res (triple string (list string) (list (pair string bool)) a)),
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                  fn ([a], []) => Document.Header (Exn.Exn (ERROR a)),
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                  fn (a, []) => Document.Perspective (map int_atom a)]))
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            end;
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        val running = Document.cancel_execution state;
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        val (assignment, state1) = Document.update old_id new_id edits state;
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        val _ = Future.join_tasks running;
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        val _ =
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          Output.raw_message Markup.assign_execs
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            ((new_id, assignment) |>
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              let open XML.Encode
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              in pair int (pair (list (pair int (option int))) (list (pair string (option int)))) end
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              |> YXML.string_of_body);
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        val state2 = Document.execute new_id state1;
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      in state2 end));
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val _ =
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  Isabelle_Process.add_command "Isar_Document.invoke_scala"
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    (fn [id, tag, res] => Invoke_Scala.fulfill_method id tag res);
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end;
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