src/Pure/PIDE/document.ML
author wenzelm
Sun Dec 28 21:34:45 2014 +0100 (2014-12-28 ago)
changeset 59193 59f1591a11cb
parent 59086 94b2690ad494
child 59198 c73933e07c03
permissions -rw-r--r--
eliminated Document.execution frontier (again, see 627fb639a2d9): just run into older execution, potentially stalling worker thread, but without global delay due to long-running tasks (notably sledgehammer);
clarified Command.run_process etc.: join running eval, bypass running print;
eliminated Command.memo in favour of regular Lazy.lazy;
more Lazy.lazy status information;
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(*  Title:      Pure/PIDE/document.ML
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    Author:     Makarius
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Document as collection of named nodes, each consisting of an editable
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list of commands, associated with asynchronous execution process.
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*)
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signature DOCUMENT =
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sig
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  val timing: bool Unsynchronized.ref
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  type node_header = string * Thy_Header.header * string list
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  type overlay = Document_ID.command * (string * string list)
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  datatype node_edit =
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    Edits of (Document_ID.command option * Document_ID.command option) list |
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    Deps of node_header |
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    Perspective of bool * Document_ID.command list * overlay list
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  type edit = string * node_edit
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  type state
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  val init_state: state
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  val define_blob: string -> string -> state -> state
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  type blob_digest = (string * string option) Exn.result
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  val define_command: Document_ID.command -> string -> blob_digest list ->
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    ((int * int) * string) list -> state -> state
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  val remove_versions: Document_ID.version list -> state -> state
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  val start_execution: state -> state
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  val update: Document_ID.version -> Document_ID.version -> edit list -> state ->
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    Document_ID.exec list * (Document_ID.command * Document_ID.exec list) list * state
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  val state: unit -> state
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  val change_state: (state -> state) -> unit
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end;
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structure Document: DOCUMENT =
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struct
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val timing = Unsynchronized.ref false;
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fun timeit msg e = cond_timeit (! timing) msg e;
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(** document structure **)
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fun err_dup kind id = error ("Duplicate " ^ kind ^ ": " ^ Document_ID.print id);
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fun err_undef kind id = error ("Undefined " ^ kind ^ ": " ^ Document_ID.print id);
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type node_header = string * Thy_Header.header * string list;
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type perspective =
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 {required: bool,  (*required node*)
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  visible: Inttab.set,  (*visible commands*)
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  visible_last: Document_ID.command option,  (*last visible command*)
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  overlays: (string * string list) list Inttab.table};  (*command id -> print functions with args*)
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structure Entries = Linear_Set(type key = Document_ID.command val ord = int_ord);
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abstype node = Node of
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 {header: node_header,  (*master directory, theory header, errors*)
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  keywords: Keyword.keywords option,  (*outer syntax keywords*)
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  perspective: perspective,  (*command perspective*)
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  entries: Command.exec option Entries.T,  (*command entries with excecutions*)
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  result: Command.eval option}  (*result of last execution*)
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and version = Version of node String_Graph.T  (*development graph wrt. static imports*)
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with
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fun make_node (header, keywords, perspective, entries, result) =
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  Node {header = header, keywords = keywords, perspective = perspective,
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    entries = entries, result = result};
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fun map_node f (Node {header, keywords, perspective, entries, result}) =
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  make_node (f (header, keywords, perspective, entries, result));
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fun make_perspective (required, command_ids, overlays) : perspective =
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 {required = required,
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  visible = Inttab.make_set command_ids,
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  visible_last = try List.last command_ids,
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  overlays = Inttab.make_list overlays};
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val no_header: node_header = ("", Thy_Header.make ("", Position.none) [] [], []);
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val no_perspective = make_perspective (false, [], []);
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val empty_node = make_node (no_header, NONE, no_perspective, Entries.empty, NONE);
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fun is_no_perspective ({required, visible, visible_last, overlays}: perspective) =
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  not required andalso
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  Inttab.is_empty visible andalso
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  is_none visible_last andalso
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  Inttab.is_empty overlays;
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fun is_empty_node (Node {header, keywords, perspective, entries, result}) =
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  header = no_header andalso
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  is_none keywords andalso
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  is_no_perspective perspective andalso
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  Entries.is_empty entries andalso
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  is_none result;
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(* basic components *)
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fun master_directory (Node {header = (master, _, _), ...}) =
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  (case try Url.explode master of
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    SOME (Url.File path) => path
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  | _ => Path.current);
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fun set_header header =
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  map_node (fn (_, keywords, perspective, entries, result) =>
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    (header, keywords, perspective, entries, result));
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fun get_header_raw (Node {header, ...}) = header;
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fun get_header (Node {header = (master, header, errors), ...}) =
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  if null errors then (master, header)
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  else error (cat_lines errors);
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fun set_keywords keywords =
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  map_node (fn (header, _, perspective, entries, result) =>
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    (header, keywords, perspective, entries, result));
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fun get_keywords (Node {keywords, ...}) = keywords;
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fun read_header node span =
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  let
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    val {name = (name, _), imports, keywords} = #2 (get_header node);
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    val {name = (_, pos), imports = imports', ...} = Thy_Header.read_tokens span;
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  in Thy_Header.make (name, pos) (map #1 imports ~~ map #2 imports') keywords end;
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fun get_perspective (Node {perspective, ...}) = perspective;
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fun set_perspective args =
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  map_node (fn (header, keywords, _, entries, result) =>
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    (header, keywords, make_perspective args, entries, result));
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val required_node = #required o get_perspective;
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val visible_command = Inttab.defined o #visible o get_perspective;
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val visible_last = #visible_last o get_perspective;
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val visible_node = is_some o visible_last
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val overlays = Inttab.lookup_list o #overlays o get_perspective;
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fun map_entries f =
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  map_node (fn (header, keywords, perspective, entries, result) =>
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    (header, keywords, perspective, f entries, result));
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fun get_entries (Node {entries, ...}) = entries;
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fun iterate_entries f = Entries.iterate NONE f o get_entries;
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fun iterate_entries_after start f (Node {entries, ...}) =
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  (case Entries.get_after entries start of
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    NONE => I
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  | SOME id => Entries.iterate (SOME id) f entries);
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fun get_result (Node {result, ...}) = result;
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fun set_result result =
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  map_node (fn (header, keywords, perspective, entries, _) =>
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    (header, keywords, perspective, entries, result));
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fun changed_result node node' =
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  (case (get_result node, get_result node') of
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    (SOME eval, SOME eval') => not (Command.eval_eq (eval, eval'))
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  | (NONE, NONE) => false
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  | _ => true);
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fun pending_result node =
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  (case get_result node of
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    SOME eval => not (Command.eval_finished eval)
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  | NONE => false);
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fun get_node nodes name = String_Graph.get_node nodes name
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  handle String_Graph.UNDEF _ => empty_node;
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fun default_node name = String_Graph.default_node (name, empty_node);
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fun update_node name f = default_node name #> String_Graph.map_node name f;
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(* node edits and associated executions *)
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type overlay = Document_ID.command * (string * string list);
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datatype node_edit =
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  Edits of (Document_ID.command option * Document_ID.command option) list |
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  Deps of node_header |
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  Perspective of bool * Document_ID.command list * overlay list;
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type edit = string * node_edit;
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val after_entry = Entries.get_after o get_entries;
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fun lookup_entry node id =
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  (case Entries.lookup (get_entries node) id of
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    NONE => NONE
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  | SOME (exec, _) => exec);
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fun the_entry node id =
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  (case Entries.lookup (get_entries node) id of
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    NONE => err_undef "command entry" id
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  | SOME (exec, _) => exec);
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fun the_default_entry node (SOME id) = (id, the_default Command.no_exec (the_entry node id))
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  | the_default_entry _ NONE = (Document_ID.none, Command.no_exec);
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fun assign_entry (command_id, exec) node =
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  if is_none (Entries.lookup (get_entries node) command_id) then node
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  else map_entries (Entries.update (command_id, exec)) node;
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fun reset_after id entries =
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  (case Entries.get_after entries id of
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    NONE => entries
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  | SOME next => Entries.update (next, NONE) entries);
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val edit_node = map_entries o fold
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  (fn (id, SOME id2) => Entries.insert_after id (id2, NONE)
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    | (id, NONE) => Entries.delete_after id #> reset_after id);
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(* version operations *)
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val empty_version = Version String_Graph.empty;
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fun nodes_of (Version nodes) = nodes;
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val node_of = get_node o nodes_of;
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fun cycle_msg names = "Cyclic dependency of " ^ space_implode " via " (map quote names);
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fun edit_nodes (name, node_edit) (Version nodes) =
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  Version
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    (case node_edit of
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      Edits edits => update_node name (edit_node edits) nodes
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    | Deps (master, header, errors) =>
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        let
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          val imports = map fst (#imports header);
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          val nodes1 = nodes
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            |> default_node name
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            |> fold default_node imports;
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          val nodes2 = nodes1
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            |> String_Graph.Keys.fold
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                (fn dep => String_Graph.del_edge (dep, name)) (String_Graph.imm_preds nodes1 name);
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          val (nodes3, errors1) =
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            (String_Graph.add_deps_acyclic (name, imports) nodes2, errors)
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              handle String_Graph.CYCLES cs => (nodes2, errors @ map cycle_msg cs);
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        in String_Graph.map_node name (set_header (master, header, errors1)) nodes3 end
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    | Perspective perspective => update_node name (set_perspective perspective) nodes);
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fun update_keywords name nodes =
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  nodes |> String_Graph.map_node name (fn node =>
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    if is_empty_node node then node
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    else
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      let
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        val (master, header, errors) = get_header_raw node;
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        val imports_keywords = map_filter (get_keywords o get_node nodes o #1) (#imports header);
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        val keywords =
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          Library.foldl Keyword.merge_keywords (Session.get_keywords (), imports_keywords);
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        val (keywords', errors') =
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          (Keyword.add_keywords (#keywords header) keywords, errors)
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            handle ERROR msg =>
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              (keywords, if member (op =) errors msg then errors else errors @ [msg]);
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      in
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        node
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        |> set_header (master, header, errors')
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        |> set_keywords (SOME keywords')
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      end);
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fun edit_keywords edits (Version nodes) =
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  Version
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    (fold update_keywords
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      (String_Graph.all_succs nodes (map_filter (fn (a, Deps _) => SOME a | _ => NONE) edits))
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      nodes);
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fun put_node (name, node) (Version nodes) =
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  let
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    val nodes1 = update_node name (K node) nodes;
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    val nodes2 =
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      if String_Graph.is_maximal nodes1 name andalso is_empty_node node
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      then String_Graph.del_node name nodes1
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      else nodes1;
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  in Version nodes2 end;
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end;
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(** main state -- document structure and execution process **)
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type blob_digest = (string * string option) Exn.result;  (*file node name, raw digest*)
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type execution =
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 {version_id: Document_ID.version,  (*static version id*)
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  execution_id: Document_ID.execution,  (*dynamic execution id*)
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  delay_request: unit future};  (*pending event timer request*)
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val no_execution: execution =
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  {version_id = Document_ID.none,
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   execution_id = Document_ID.none,
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   delay_request = Future.value ()};
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fun new_execution version_id delay_request : execution =
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  {version_id = version_id,
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   execution_id = Execution.start (),
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   delay_request = delay_request};
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abstype state = State of
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 {versions: version Inttab.table,  (*version id -> document content*)
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  blobs: (SHA1.digest * string list) Symtab.table,  (*raw digest -> digest, lines*)
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  commands: (string * blob_digest list * Token.T list lazy) Inttab.table,
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    (*command id -> name, inlined files, command span*)
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  execution: execution}  (*current execution process*)
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with
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fun make_state (versions, blobs, commands, execution) =
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  State {versions = versions, blobs = blobs, commands = commands, execution = execution};
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fun map_state f (State {versions, blobs, commands, execution}) =
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  make_state (f (versions, blobs, commands, execution));
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val init_state =
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  make_state (Inttab.make [(Document_ID.none, empty_version)],
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    Symtab.empty, Inttab.empty, no_execution);
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(* document versions *)
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fun define_version version_id version =
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  map_state (fn (versions, blobs, commands, {delay_request, ...}) =>
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    let
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      val versions' = Inttab.update_new (version_id, version) versions
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        handle Inttab.DUP dup => err_dup "document version" dup;
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      val execution' = new_execution version_id delay_request;
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    in (versions', blobs, commands, execution') end);
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fun the_version (State {versions, ...}) version_id =
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  (case Inttab.lookup versions version_id of
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    NONE => err_undef "document version" version_id
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  | SOME version => version);
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fun delete_version version_id versions =
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  Inttab.delete version_id versions
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    handle Inttab.UNDEF _ => err_undef "document version" version_id;
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(* inlined files *)
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fun define_blob digest text =
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  map_state (fn (versions, blobs, commands, execution) =>
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    let val blobs' = Symtab.update (digest, (SHA1.fake digest, split_lines text)) blobs
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    in (versions, blobs', commands, execution) end);
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   342
wenzelm@54519
   343
fun the_blob (State {blobs, ...}) digest =
wenzelm@54519
   344
  (case Symtab.lookup blobs digest of
wenzelm@54519
   345
    NONE => error ("Undefined blob: " ^ digest)
wenzelm@55788
   346
  | SOME content => content);
wenzelm@54519
   347
wenzelm@56447
   348
fun resolve_blob state (blob_digest: blob_digest) =
wenzelm@56458
   349
  blob_digest |> Exn.map_result (fn (file_node, raw_digest) =>
wenzelm@56458
   350
    (file_node, Option.map (the_blob state) raw_digest));
wenzelm@56447
   351
wenzelm@54519
   352
wenzelm@38418
   353
(* commands *)
wenzelm@38418
   354
wenzelm@59085
   355
fun define_command command_id name command_blobs toks =
wenzelm@54519
   356
  map_state (fn (versions, blobs, commands, execution) =>
wenzelm@38418
   357
    let
wenzelm@52536
   358
      val id = Document_ID.print command_id;
wenzelm@52536
   359
      val span =
wenzelm@52536
   360
        Lazy.lazy (fn () =>
wenzelm@52536
   361
          Position.setmp_thread_data (Position.id_only id)
wenzelm@59085
   362
            (fn () => #1 (fold_map Token.make toks (Position.id id))) ());
wenzelm@47395
   363
      val _ =
wenzelm@52536
   364
        Position.setmp_thread_data (Position.id_only id)
wenzelm@50201
   365
          (fn () => Output.status (Markup.markup_only Markup.accepted)) ();
wenzelm@38418
   366
      val commands' =
wenzelm@54519
   367
        Inttab.update_new (command_id, (name, command_blobs, span)) commands
wenzelm@38418
   368
          handle Inttab.DUP dup => err_dup "command" dup;
wenzelm@54519
   369
    in (versions, blobs, commands', execution) end);
wenzelm@38418
   370
wenzelm@52536
   371
fun the_command (State {commands, ...}) command_id =
wenzelm@52536
   372
  (case Inttab.lookup commands command_id of
wenzelm@52536
   373
    NONE => err_undef "command" command_id
wenzelm@44644
   374
  | SOME command => command);
wenzelm@38418
   375
wenzelm@52569
   376
val the_command_name = #1 oo the_command;
wenzelm@52569
   377
wenzelm@47420
   378
end;
wenzelm@38418
   379
wenzelm@52566
   380
wenzelm@52566
   381
(* remove_versions *)
wenzelm@52566
   382
wenzelm@54519
   383
fun remove_versions version_ids state = state |> map_state (fn (versions, _, _, execution) =>
wenzelm@47420
   384
  let
wenzelm@52536
   385
    val _ =
wenzelm@52536
   386
      member (op =) version_ids (#version_id execution) andalso
wenzelm@52536
   387
        error ("Attempt to remove execution version " ^ Document_ID.print (#version_id execution));
wenzelm@47343
   388
wenzelm@52536
   389
    val versions' = fold delete_version version_ids versions;
wenzelm@47420
   390
    val commands' =
wenzelm@47420
   391
      (versions', Inttab.empty) |->
wenzelm@47420
   392
        Inttab.fold (fn (_, version) => nodes_of version |>
wenzelm@50862
   393
          String_Graph.fold (fn (_, (node, _)) => node |>
wenzelm@52536
   394
            iterate_entries (fn ((_, command_id), _) =>
wenzelm@52536
   395
              SOME o Inttab.insert (K true) (command_id, the_command state command_id))));
wenzelm@54519
   396
    val blobs' =
wenzelm@54519
   397
      (commands', Symtab.empty) |->
wenzelm@54519
   398
        Inttab.fold (fn (_, (_, blobs, _)) => blobs |>
wenzelm@56458
   399
          fold (fn Exn.Res (_, SOME b) => Symtab.update (b, the_blob state b) | _ => I));
wenzelm@54519
   400
wenzelm@54519
   401
  in (versions', blobs', commands', execution) end);
wenzelm@38418
   402
wenzelm@38418
   403
wenzelm@52604
   404
(* document execution *)
wenzelm@47389
   405
wenzelm@54519
   406
fun start_execution state = state |> map_state (fn (versions, blobs, commands, execution) =>
wenzelm@52796
   407
  timeit "Document.start_execution" (fn () =>
wenzelm@52796
   408
    let
wenzelm@59193
   409
      val {version_id, execution_id, delay_request} = execution;
wenzelm@52798
   410
wenzelm@52798
   411
      val delay = seconds (Options.default_real "editor_execution_delay");
wenzelm@52774
   412
wenzelm@52798
   413
      val _ = Future.cancel delay_request;
wenzelm@52798
   414
      val delay_request' = Event_Timer.future (Time.+ (Time.now (), delay));
wenzelm@52798
   415
wenzelm@59193
   416
      val _ =
wenzelm@52573
   417
        nodes_of (the_version state version_id) |> String_Graph.schedule
wenzelm@52573
   418
          (fn deps => fn (name, node) =>
wenzelm@52772
   419
            if visible_node node orelse pending_result node then
wenzelm@52774
   420
              let
wenzelm@52775
   421
                fun body () =
wenzelm@52775
   422
                  iterate_entries (fn (_, opt_exec) => fn () =>
wenzelm@52775
   423
                    (case opt_exec of
wenzelm@52775
   424
                      SOME exec =>
wenzelm@52775
   425
                        if Execution.is_running execution_id
wenzelm@52775
   426
                        then SOME (Command.exec execution_id exec)
wenzelm@52775
   427
                        else NONE
wenzelm@52775
   428
                    | NONE => NONE)) node ()
wenzelm@52775
   429
                  handle exn => if Exn.is_interrupt exn then () (*sic!*) else reraise exn;
wenzelm@52774
   430
                val future =
wenzelm@52774
   431
                  (singleton o Future.forks)
wenzelm@59193
   432
                   {name = "theory:" ^ name,
wenzelm@59193
   433
                    group = SOME (Future.new_group NONE),
wenzelm@59193
   434
                    deps = Future.task_of delay_request' :: maps #2 deps,
wenzelm@59193
   435
                    pri = 0, interrupts = false} body;
wenzelm@59193
   436
              in [Future.task_of future] end
wenzelm@52796
   437
            else []);
wenzelm@52798
   438
      val execution' =
wenzelm@59193
   439
        {version_id = version_id, execution_id = execution_id, delay_request = delay_request'};
wenzelm@54519
   440
    in (versions, blobs, commands, execution') end));
wenzelm@47345
   441
wenzelm@47345
   442
wenzelm@47420
   443
wenzelm@47420
   444
(** document update **)
wenzelm@38418
   445
wenzelm@52566
   446
(* exec state assignment *)
wenzelm@52566
   447
wenzelm@52566
   448
type assign_update = Command.exec option Inttab.table;  (*command id -> exec*)
wenzelm@52566
   449
wenzelm@52566
   450
val assign_update_empty: assign_update = Inttab.empty;
wenzelm@52566
   451
fun assign_update_defined (tab: assign_update) command_id = Inttab.defined tab command_id;
wenzelm@52566
   452
fun assign_update_apply (tab: assign_update) node = Inttab.fold assign_entry tab node;
wenzelm@52566
   453
wenzelm@52566
   454
fun assign_update_new upd (tab: assign_update) =
wenzelm@52566
   455
  Inttab.update_new upd tab
wenzelm@52566
   456
    handle Inttab.DUP dup => err_dup "exec state assignment" dup;
wenzelm@52566
   457
wenzelm@52566
   458
fun assign_update_result (tab: assign_update) =
wenzelm@52566
   459
  Inttab.fold (fn (command_id, exec) => cons (command_id, Command.exec_ids exec)) tab [];
wenzelm@52566
   460
wenzelm@52566
   461
wenzelm@52566
   462
(* update *)
wenzelm@52566
   463
wenzelm@38418
   464
local
wenzelm@38418
   465
wenzelm@47335
   466
fun make_required nodes =
wenzelm@47335
   467
  let
wenzelm@52808
   468
    fun all_preds P =
wenzelm@52808
   469
      String_Graph.fold (fn (a, (node, _)) => P node ? cons a) nodes []
wenzelm@50862
   470
      |> String_Graph.all_preds nodes
wenzelm@52808
   471
      |> Symtab.make_set;
wenzelm@47345
   472
wenzelm@52808
   473
    val all_visible = all_preds visible_node;
wenzelm@52808
   474
    val all_required = all_preds required_node;
wenzelm@52808
   475
  in
wenzelm@52808
   476
    Symtab.fold (fn (a, ()) =>
wenzelm@52808
   477
      exists (Symtab.defined all_visible) (String_Graph.immediate_succs nodes a) ?
wenzelm@52808
   478
        Symtab.update (a, ())) all_visible all_required
wenzelm@52808
   479
  end;
wenzelm@47335
   480
wenzelm@54516
   481
fun loaded_theory name =
wenzelm@54516
   482
  (case try (unsuffix ".thy") name of
wenzelm@56801
   483
    SOME a => get_first Thy_Info.lookup_theory [a, Long_Name.base_name a]
wenzelm@54516
   484
  | NONE => NONE);
wenzelm@54516
   485
wenzelm@48927
   486
fun init_theory deps node span =
wenzelm@47335
   487
  let
wenzelm@54526
   488
    val master_dir = master_directory node;
wenzelm@54526
   489
    val header = read_header node span;
wenzelm@48927
   490
    val imports = #imports header;
wenzelm@47335
   491
    val parents =
wenzelm@48927
   492
      imports |> map (fn (import, _) =>
wenzelm@54516
   493
        (case loaded_theory import of
wenzelm@47335
   494
          SOME thy => thy
wenzelm@47335
   495
        | NONE =>
wenzelm@47339
   496
            Toplevel.end_theory (Position.file_only import)
wenzelm@52536
   497
              (case get_result (snd (the (AList.lookup (op =) deps import))) of
wenzelm@52536
   498
                NONE => Toplevel.toplevel
wenzelm@52536
   499
              | SOME eval => Command.eval_result_state eval)));
wenzelm@48927
   500
    val _ = Position.reports (map #2 imports ~~ map Theory.get_markup parents);
wenzelm@56208
   501
  in Resources.begin_theory master_dir header parents end;
wenzelm@47335
   502
wenzelm@47407
   503
fun check_theory full name node =
wenzelm@54516
   504
  is_some (loaded_theory name) orelse
wenzelm@48707
   505
  can get_header node andalso (not full orelse is_some (get_result node));
wenzelm@47335
   506
wenzelm@58923
   507
fun last_common keywords state node_required node0 node =
wenzelm@44482
   508
  let
wenzelm@44645
   509
    fun update_flags prev (visible, initial) =
wenzelm@44645
   510
      let
wenzelm@52569
   511
        val visible' = visible andalso prev <> visible_last node;
wenzelm@44645
   512
        val initial' = initial andalso
wenzelm@44645
   513
          (case prev of
wenzelm@44645
   514
            NONE => true
wenzelm@58923
   515
          | SOME command_id =>
wenzelm@58923
   516
              not (Keyword.is_theory_begin keywords (the_command_name state command_id)));
wenzelm@44645
   517
      in (visible', initial') end;
wenzelm@52569
   518
wenzelm@52784
   519
    fun get_common ((prev, command_id), opt_exec) (_, ok, flags, assign_update) =
wenzelm@52784
   520
      if ok then
wenzelm@47630
   521
        let
wenzelm@52784
   522
          val flags' as (visible', _) = update_flags prev flags;
wenzelm@52784
   523
          val ok' =
wenzelm@52586
   524
            (case (lookup_entry node0 command_id, opt_exec) of
wenzelm@52784
   525
              (SOME (eval0, _), SOME (eval, _)) =>
wenzelm@52784
   526
                Command.eval_eq (eval0, eval) andalso
wenzelm@52784
   527
                  (visible' orelse node_required orelse Command.eval_running eval)
wenzelm@52586
   528
            | _ => false);
wenzelm@52784
   529
          val assign_update' = assign_update |> ok' ?
wenzelm@52569
   530
            (case opt_exec of
wenzelm@52569
   531
              SOME (eval, prints) =>
wenzelm@52569
   532
                let
wenzelm@52569
   533
                  val command_visible = visible_command node command_id;
wenzelm@52850
   534
                  val command_overlays = overlays node command_id;
wenzelm@52569
   535
                  val command_name = the_command_name state command_id;
wenzelm@52569
   536
                in
wenzelm@58923
   537
                  (case
wenzelm@58923
   538
                    Command.print command_visible command_overlays keywords command_name eval prints
wenzelm@58923
   539
                   of
wenzelm@52569
   540
                    SOME prints' => assign_update_new (command_id, SOME (eval, prints'))
wenzelm@52569
   541
                  | NONE => I)
wenzelm@52569
   542
                end
wenzelm@52569
   543
            | NONE => I);
wenzelm@52784
   544
        in SOME (prev, ok', flags', assign_update') end
wenzelm@47630
   545
      else NONE;
wenzelm@52784
   546
    val (common, ok, flags, assign_update') =
wenzelm@52569
   547
      iterate_entries get_common node (NONE, true, (true, true), assign_update_empty);
wenzelm@52569
   548
    val (common', flags') =
wenzelm@52784
   549
      if ok then
wenzelm@52569
   550
        let val last = Entries.get_after (get_entries node) common
wenzelm@52569
   551
        in (last, update_flags last flags) end
wenzelm@52569
   552
      else (common, flags);
wenzelm@52569
   553
  in (assign_update', common', flags') end;
wenzelm@44645
   554
wenzelm@52534
   555
fun illegal_init _ = error "Illegal theory header after end of theory";
wenzelm@52534
   556
wenzelm@58923
   557
fun new_exec keywords state node proper_init command_id' (assign_update, command_exec, init) =
wenzelm@47407
   558
  if not proper_init andalso is_none init then NONE
wenzelm@44645
   559
  else
wenzelm@44645
   560
    let
wenzelm@52534
   561
      val (_, (eval, _)) = command_exec;
wenzelm@52850
   562
wenzelm@52850
   563
      val command_visible = visible_command node command_id';
wenzelm@52850
   564
      val command_overlays = overlays node command_id';
wenzelm@55788
   565
      val (command_name, blob_digests, span0) = the_command state command_id';
wenzelm@56447
   566
      val blobs = map (resolve_blob state) blob_digests;
wenzelm@54519
   567
      val span = Lazy.force span0;
wenzelm@52566
   568
wenzelm@54519
   569
      val eval' =
wenzelm@58934
   570
        Command.eval keywords (master_directory node)
wenzelm@58923
   571
          (fn () => the_default illegal_init init span) blobs span eval;
wenzelm@58923
   572
      val prints' =
wenzelm@58923
   573
        perhaps (Command.print command_visible command_overlays keywords command_name eval') [];
wenzelm@52566
   574
      val exec' = (eval', prints');
wenzelm@44482
   575
wenzelm@52566
   576
      val assign_update' = assign_update_new (command_id', SOME exec') assign_update;
wenzelm@58923
   577
      val init' = if Keyword.is_theory_begin keywords command_name then NONE else init;
wenzelm@52566
   578
    in SOME (assign_update', (command_id', (eval', prints')), init') end;
wenzelm@52602
   579
wenzelm@52655
   580
fun removed_execs node0 (command_id, exec_ids) =
wenzelm@52655
   581
  subtract (op =) exec_ids (Command.exec_ids (lookup_entry node0 command_id));
wenzelm@52602
   582
wenzelm@38418
   583
in
wenzelm@38418
   584
wenzelm@59056
   585
fun update old_version_id new_version_id edits state = Runtime.exn_trace_system (fn () =>
wenzelm@38418
   586
  let
wenzelm@52536
   587
    val old_version = the_version state old_version_id;
wenzelm@59086
   588
    val new_version =
wenzelm@59086
   589
      timeit "Document.edit_nodes"
wenzelm@59086
   590
        (fn () => old_version |> fold edit_nodes edits |> edit_keywords edits);
wenzelm@38418
   591
wenzelm@44544
   592
    val nodes = nodes_of new_version;
wenzelm@52776
   593
    val required = make_required nodes;
wenzelm@52776
   594
    val required0 = make_required (nodes_of old_version);
wenzelm@52772
   595
    val edited = fold (fn (name, _) => Symtab.update (name, ())) edits Symtab.empty;
wenzelm@44544
   596
wenzelm@47628
   597
    val updated = timeit "Document.update" (fn () =>
wenzelm@50862
   598
      nodes |> String_Graph.schedule
wenzelm@44199
   599
        (fn deps => fn (name, node) =>
wenzelm@47406
   600
          (singleton o Future.forks)
wenzelm@47406
   601
            {name = "Document.update", group = NONE,
wenzelm@52716
   602
              deps = map (Future.task_of o #2) deps, pri = 1, interrupts = false}
wenzelm@59056
   603
            (fn () =>
wenzelm@59056
   604
              timeit ("Document.update " ^ name) (fn () =>
wenzelm@59056
   605
                Runtime.exn_trace_system (fn () =>
wenzelm@44482
   606
                  let
wenzelm@59086
   607
                    val keywords = the_default (Session.get_keywords ()) (get_keywords node);
wenzelm@59056
   608
                    val imports = map (apsnd Future.join) deps;
wenzelm@59056
   609
                    val imports_result_changed = exists (#4 o #1 o #2) imports;
wenzelm@59056
   610
                    val node_required = Symtab.defined required name;
wenzelm@59056
   611
                  in
wenzelm@59056
   612
                    if Symtab.defined edited name orelse visible_node node orelse
wenzelm@59056
   613
                      imports_result_changed orelse Symtab.defined required0 name <> node_required
wenzelm@59056
   614
                    then
wenzelm@59056
   615
                      let
wenzelm@59056
   616
                        val node0 = node_of old_version name;
wenzelm@59056
   617
                        val init = init_theory imports node;
wenzelm@59056
   618
                        val proper_init =
wenzelm@59056
   619
                          check_theory false name node andalso
wenzelm@59056
   620
                          forall (fn (name, (_, node)) => check_theory true name node) imports;
wenzelm@47406
   621
wenzelm@59056
   622
                        val (print_execs, common, (still_visible, initial)) =
wenzelm@59056
   623
                          if imports_result_changed then (assign_update_empty, NONE, (true, true))
wenzelm@59056
   624
                          else last_common keywords state node_required node0 node;
wenzelm@59056
   625
                        val common_command_exec = the_default_entry node common;
wenzelm@44479
   626
wenzelm@59056
   627
                        val (updated_execs, (command_id', (eval', _)), _) =
wenzelm@59056
   628
                          (print_execs, common_command_exec, if initial then SOME init else NONE)
wenzelm@59056
   629
                          |> (still_visible orelse node_required) ?
wenzelm@59056
   630
                            iterate_entries_after common
wenzelm@59056
   631
                              (fn ((prev, id), _) => fn res =>
wenzelm@59056
   632
                                if not node_required andalso prev = visible_last node then NONE
wenzelm@59056
   633
                                else new_exec keywords state node proper_init id res) node;
wenzelm@44479
   634
wenzelm@59056
   635
                        val assigned_execs =
wenzelm@59056
   636
                          (node0, updated_execs) |-> iterate_entries_after common
wenzelm@59056
   637
                            (fn ((_, command_id0), exec0) => fn res =>
wenzelm@59056
   638
                              if is_none exec0 then NONE
wenzelm@59056
   639
                              else if assign_update_defined updated_execs command_id0 then SOME res
wenzelm@59056
   640
                              else SOME (assign_update_new (command_id0, NONE) res));
wenzelm@44480
   641
wenzelm@59056
   642
                        val last_exec =
wenzelm@59056
   643
                          if command_id' = Document_ID.none then NONE else SOME command_id';
wenzelm@59056
   644
                        val result =
wenzelm@59056
   645
                          if is_none last_exec orelse is_some (after_entry node last_exec) then NONE
wenzelm@59056
   646
                          else SOME eval';
wenzelm@44480
   647
wenzelm@59056
   648
                        val assign_update = assign_update_result assigned_execs;
wenzelm@59056
   649
                        val removed = maps (removed_execs node0) assign_update;
wenzelm@59056
   650
                        val _ = List.app Execution.cancel removed;
wenzelm@52602
   651
wenzelm@59056
   652
                        val node' = node
wenzelm@59056
   653
                          |> assign_update_apply assigned_execs
wenzelm@59056
   654
                          |> set_result result;
wenzelm@59056
   655
                        val assigned_node = SOME (name, node');
wenzelm@59056
   656
                        val result_changed = changed_result node0 node';
wenzelm@59056
   657
                      in ((removed, assign_update, assigned_node, result_changed), node') end
wenzelm@59056
   658
                    else (([], [], NONE, false), node)
wenzelm@59056
   659
                  end))))
wenzelm@47628
   660
      |> Future.joins |> map #1);
wenzelm@44476
   661
wenzelm@52655
   662
    val removed = maps #1 updated;
wenzelm@52655
   663
    val assign_update = maps #2 updated;
wenzelm@52602
   664
    val assigned_nodes = map_filter #3 updated;
wenzelm@52602
   665
wenzelm@44197
   666
    val state' = state
wenzelm@52602
   667
      |> define_version new_version_id (fold put_node assigned_nodes new_version);
wenzelm@52602
   668
wenzelm@59056
   669
  in (removed, assign_update, state') end);
wenzelm@38418
   670
wenzelm@38418
   671
end;
wenzelm@38418
   672
wenzelm@38418
   673
wenzelm@43713
   674
wenzelm@43713
   675
(** global state **)
wenzelm@43713
   676
wenzelm@52508
   677
val global_state = Synchronized.var "Document.global_state" init_state;
wenzelm@43713
   678
wenzelm@43713
   679
fun state () = Synchronized.value global_state;
wenzelm@43713
   680
val change_state = Synchronized.change global_state;
wenzelm@43713
   681
wenzelm@38418
   682
end;
wenzelm@38418
   683