wenzelm@26605
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(* Title: Pure/Isar/isar.ML
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Author: Makarius
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The global Isabelle/Isar state and main read-eval-print loop.
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*)
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signature ISAR =
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sig
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val init: unit -> unit
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val exn: unit -> (exn * string) option
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val state: unit -> Toplevel.state
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val context: unit -> Proof.context
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val goal: unit -> thm
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val print: unit -> unit
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val >> : Toplevel.transition -> bool
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val >>> : Toplevel.transition list -> unit
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val linear_undo: int -> unit
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val undo: int -> unit
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val kill: unit -> unit
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val kill_proof: unit -> unit
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val crashes: exn list ref
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val toplevel_loop: {init: bool, welcome: bool, sync: bool, secure: bool} -> unit
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val loop: unit -> unit
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val main: unit -> unit
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type id = string
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val no_id: id
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val create_command: Toplevel.transition -> id
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val insert_command: id -> id -> unit
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val remove_command: id -> unit
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end;
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structure Isar: ISAR =
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struct
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(** TTY model -- SINGLE-THREADED! **)
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(* the global state *)
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type history = (Toplevel.state * Toplevel.transition) list;
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(*previous state, state transition -- regular commands only*)
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local
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val global_history = ref ([]: history);
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val global_state = ref Toplevel.toplevel;
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val global_exn = ref (NONE: (exn * string) option);
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in
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fun edit_history count f = NAMED_CRITICAL "Isar" (fn () =>
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let
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fun edit 0 (st, hist) = (global_history := hist; global_state := st; global_exn := NONE)
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| edit n (st, hist) = edit (n - 1) (f st hist);
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in edit count (! global_state, ! global_history) end);
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fun state () = NAMED_CRITICAL "Isar" (fn () => ! global_state);
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fun set_state state = NAMED_CRITICAL "Isar" (fn () => global_state := state);
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fun exn () = NAMED_CRITICAL "Isar" (fn () => ! global_exn);
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fun set_exn exn = NAMED_CRITICAL "Isar" (fn () => global_exn := exn);
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end;
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fun init () = edit_history 1 (K (K (Toplevel.toplevel, [])));
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fun context () = Toplevel.context_of (state ())
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handle Toplevel.UNDEF => error "Unknown context";
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fun goal () = #2 (#2 (Proof.get_goal (Toplevel.proof_of (state ()))))
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handle Toplevel.UNDEF => error "No goal present";
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fun print () = Toplevel.print_state false (state ());
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(* history navigation *)
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local
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fun find_and_undo _ [] = error "Undo history exhausted"
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| find_and_undo which ((prev, tr) :: hist) =
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((case Toplevel.init_of tr of SOME name => ThyInfo.kill_thy name | NONE => ());
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if which (Toplevel.name_of tr) then (prev, hist) else find_and_undo which hist);
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in
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fun linear_undo n = edit_history n (K (find_and_undo (K true)));
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fun undo n = edit_history n (fn st => fn hist =>
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find_and_undo (if Toplevel.is_proof st then K true else OuterKeyword.is_theory) hist);
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fun kill () = edit_history 1 (fn st => fn hist =>
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find_and_undo
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(if Toplevel.is_proof st then OuterKeyword.is_theory else OuterKeyword.is_theory_begin) hist);
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fun kill_proof () = edit_history 1 (fn st => fn hist =>
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if Toplevel.is_proof st then find_and_undo OuterKeyword.is_theory hist
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else raise Toplevel.UNDEF);
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end;
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(* interactive state transformations *)
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fun op >> tr =
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(case Toplevel.transition true tr (state ()) of
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NONE => false
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| SOME (_, SOME err) => (set_exn (SOME err); Toplevel.error_msg tr err; true)
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| SOME (st', NONE) =>
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let
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val name = Toplevel.name_of tr;
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val _ = if OuterKeyword.is_theory_begin name then init () else ();
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val _ =
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if OuterKeyword.is_regular name
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then edit_history 1 (fn st => fn hist => (st', (st, tr) :: hist)) else ();
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in true end);
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fun op >>> [] = ()
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| op >>> (tr :: trs) = if op >> tr then op >>> trs else ();
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(* toplevel loop *)
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val crashes = ref ([]: exn list);
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local
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fun raw_loop secure src =
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let
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fun check_secure () =
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(if secure then warning "Secure loop -- cannot exit to ML" else (); secure);
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in
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(case Source.get_single (Source.set_prompt Source.default_prompt src) of
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NONE => if secure then quit () else ()
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| SOME (tr, src') => if op >> tr orelse check_secure () then raw_loop secure src' else ())
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handle exn =>
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(Output.error_msg (Toplevel.exn_message exn)
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handle crash =>
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(CRITICAL (fn () => change crashes (cons crash));
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warning "Recovering from Isar toplevel crash -- see also Isar.crashes");
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raw_loop secure src)
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end;
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in
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fun toplevel_loop {init = do_init, welcome, sync, secure} =
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(Context.set_thread_data NONE;
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if do_init then init () else (); (* FIXME init editor model *)
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if welcome then writeln (Session.welcome ()) else ();
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uninterruptible (fn _ => fn () => raw_loop secure (OuterSyntax.isar sync)) ());
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end;
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fun loop () =
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toplevel_loop {init = false, welcome = false, sync = false, secure = Secure.is_secure ()};
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fun main () =
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toplevel_loop {init = true, welcome = true, sync = false, secure = Secure.is_secure ()};
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(** individual toplevel commands **)
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(* unique identification *)
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type id = string;
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val no_id : id = "";
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(* command category *)
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datatype category = Empty | Theory | Proof | Diag | Control;
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fun category_of tr =
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let val name = Toplevel.name_of tr in
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if name = "" then Empty
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else if OuterKeyword.is_theory name then Theory
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else if OuterKeyword.is_proof name then Proof
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else if OuterKeyword.is_diag name then Diag
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else Control
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end;
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val is_theory = fn Theory => true | _ => false;
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val is_proper = fn Theory => true | Proof => true | _ => false;
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val is_regular = fn Control => false | _ => true;
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(* command status *)
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datatype status =
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Unprocessed |
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Running |
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Failed of exn * string |
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Finished of Toplevel.state;
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fun status_markup Unprocessed = Markup.unprocessed
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| status_markup Running = (Markup.runningN, [])
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| status_markup (Failed _) = Markup.failed
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| status_markup (Finished _) = Markup.finished;
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fun run int tr state =
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(case Toplevel.transition int tr state of
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NONE => NONE
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| SOME (_, SOME err) => (Toplevel.error_msg tr err; SOME (Failed err))
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| SOME (state', NONE) => SOME (Finished state'));
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(* datatype command *)
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datatype command = Command of
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{category: category,
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transition: Toplevel.transition,
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status: status};
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fun make_command (category, transition, status) =
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Command {category = category, transition = transition, status = status};
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val empty_command =
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make_command (Empty, Toplevel.empty, Finished Toplevel.toplevel);
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fun map_command f (Command {category, transition, status}) =
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make_command (f (category, transition, status));
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fun map_status f = map_command (fn (category, transition, status) =>
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(category, transition, f status));
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(* global collection of identified commands *)
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fun err_dup id = sys_error ("Duplicate command " ^ quote id);
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fun err_undef id = sys_error ("Unknown command " ^ quote id);
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local val global_commands = ref (Graph.empty: command Graph.T) in
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fun change_commands f = NAMED_CRITICAL "Isar" (fn () => change global_commands f)
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handle Graph.DUP bad => err_dup bad | Graph.UNDEF bad => err_undef bad;
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fun get_commands () = NAMED_CRITICAL "Isar" (fn () => ! global_commands);
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end;
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fun add_edge (id1, id2) =
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if id1 = no_id orelse id2 = no_id then I else Graph.add_edge (id1, id2);
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fun init_commands () = change_commands (K Graph.empty);
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fun the_command id =
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let val Command cmd =
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if id = no_id then empty_command
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else (Graph.get_node (get_commands ()) id handle Graph.UNDEF bad => err_undef bad)
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wenzelm@27524
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in cmd end;
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wenzelm@27518
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wenzelm@27518
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fun prev_command id =
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if id = no_id then no_id
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else
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(case Graph.imm_preds (get_commands ()) id handle Graph.UNDEF bad => err_undef bad of
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wenzelm@27620
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[] => no_id
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| [prev] => prev
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| _ => sys_error ("Non-linear command dependency " ^ quote id));
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wenzelm@27501
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wenzelm@27616
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fun next_commands id =
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if id = no_id then []
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else Graph.imm_succs (get_commands ()) id handle Graph.UNDEF bad => err_undef bad;
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wenzelm@27501
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fun descendant_commands ids =
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wenzelm@27620
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Graph.all_succs (get_commands ()) (distinct (op =) (filter_out (fn id => id = no_id) ids))
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handle Graph.UNDEF bad => err_undef bad;
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wenzelm@27428
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wenzelm@27616
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(* maintain status *)
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fun report_status markup id = Toplevel.status (#transition (the_command id)) markup;
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fun update_status status id = change_commands (Graph.map_node id (map_status (K status)));
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fun report_update_status status id =
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change_commands (Graph.map_node id (map_status (fn old_status =>
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let val markup = status_markup status
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in if markup <> status_markup old_status then report_status markup id else (); status end)));
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wenzelm@27616
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(* create and dispose commands *)
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wenzelm@27616
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wenzelm@27616
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fun create_command raw_tr =
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wenzelm@27616
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let
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wenzelm@29314
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val (id, tr) =
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wenzelm@29314
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(case Toplevel.get_id raw_tr of
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wenzelm@29314
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SOME id => (id, raw_tr)
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wenzelm@29314
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| NONE =>
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wenzelm@29314
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let val id =
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wenzelm@29314
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if ! Toplevel.debug then "isabelle:" ^ Toplevel.name_of raw_tr ^ serial_string ()
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wenzelm@29314
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else "isabelle:" ^ serial_string ()
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wenzelm@29314
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in (id, Toplevel.put_id id raw_tr) end);
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wenzelm@29314
|
295 |
|
wenzelm@27616
|
296 |
val cmd = make_command (category_of tr, tr, Unprocessed);
|
wenzelm@27616
|
297 |
val _ = change_commands (Graph.new_node (id, cmd));
|
wenzelm@27616
|
298 |
in id end;
|
wenzelm@27616
|
299 |
|
wenzelm@27620
|
300 |
fun dispose_commands ids =
|
wenzelm@27616
|
301 |
let
|
wenzelm@27620
|
302 |
val desc = descendant_commands ids;
|
wenzelm@27616
|
303 |
val _ = List.app (report_status Markup.disposed) desc;
|
wenzelm@27616
|
304 |
val _ = change_commands (Graph.del_nodes desc);
|
wenzelm@27616
|
305 |
in () end;
|
wenzelm@27616
|
306 |
|
wenzelm@27616
|
307 |
|
wenzelm@27616
|
308 |
(* final state *)
|
wenzelm@27616
|
309 |
|
wenzelm@27616
|
310 |
fun the_state id =
|
wenzelm@27524
|
311 |
(case the_command id of
|
wenzelm@27616
|
312 |
{status = Finished state, ...} => state
|
wenzelm@27524
|
313 |
| {transition, ...} => error ("Unfinished command " ^ Toplevel.str_of transition));
|
wenzelm@27524
|
314 |
|
wenzelm@27606
|
315 |
|
wenzelm@27428
|
316 |
|
wenzelm@27616
|
317 |
(** editor model **)
|
wenzelm@27616
|
318 |
|
wenzelm@27620
|
319 |
(* run commands *)
|
wenzelm@27616
|
320 |
|
wenzelm@27620
|
321 |
fun try_run id =
|
wenzelm@27620
|
322 |
(case try the_state (prev_command id) of
|
wenzelm@27620
|
323 |
NONE => ()
|
wenzelm@27620
|
324 |
| SOME state =>
|
wenzelm@27622
|
325 |
(case run true (#transition (the_command id)) state of
|
wenzelm@27620
|
326 |
NONE => ()
|
wenzelm@27662
|
327 |
| SOME status => report_update_status status id));
|
wenzelm@28300
|
328 |
|
wenzelm@27620
|
329 |
fun rerun_commands ids =
|
wenzelm@27662
|
330 |
(List.app (report_update_status Unprocessed) ids; List.app try_run ids);
|
wenzelm@27616
|
331 |
|
wenzelm@27616
|
332 |
|
wenzelm@27616
|
333 |
(* modify document *)
|
wenzelm@27616
|
334 |
|
wenzelm@27616
|
335 |
fun insert_command prev id = NAMED_CRITICAL "Isar" (fn () =>
|
wenzelm@27616
|
336 |
let
|
wenzelm@27616
|
337 |
val nexts = next_commands prev;
|
wenzelm@27616
|
338 |
val _ = change_commands
|
wenzelm@27620
|
339 |
(fold (fn next => Graph.del_edge (prev, next)) nexts #> add_edge (prev, id) #>
|
wenzelm@27620
|
340 |
fold (fn next => Graph.add_edge (id, next)) nexts);
|
wenzelm@27620
|
341 |
in descendant_commands [id] end) |> rerun_commands;
|
wenzelm@27616
|
342 |
|
wenzelm@27616
|
343 |
fun remove_command id = NAMED_CRITICAL "Isar" (fn () =>
|
wenzelm@27616
|
344 |
let
|
wenzelm@27620
|
345 |
val prev = prev_command id;
|
wenzelm@27616
|
346 |
val nexts = next_commands id;
|
wenzelm@27620
|
347 |
val _ = change_commands
|
wenzelm@27620
|
348 |
(fold (fn next => Graph.del_edge (id, next)) nexts #>
|
wenzelm@27620
|
349 |
fold (fn next => add_edge (prev, next)) nexts);
|
wenzelm@27620
|
350 |
in descendant_commands nexts end) |> rerun_commands;
|
wenzelm@27616
|
351 |
|
wenzelm@28300
|
352 |
|
wenzelm@30174
|
353 |
|
wenzelm@30174
|
354 |
(** command syntax **)
|
wenzelm@28300
|
355 |
|
wenzelm@28300
|
356 |
local
|
wenzelm@28300
|
357 |
|
wenzelm@30174
|
358 |
structure P = OuterParse and K = OuterKeyword;
|
wenzelm@28300
|
359 |
val op >> = Scan.>>;
|
wenzelm@28300
|
360 |
|
wenzelm@28300
|
361 |
in
|
wenzelm@28300
|
362 |
|
wenzelm@30174
|
363 |
(* global history *)
|
wenzelm@30174
|
364 |
|
wenzelm@30174
|
365 |
val _ =
|
wenzelm@30174
|
366 |
OuterSyntax.improper_command "init_toplevel" "init toplevel point-of-interest" K.control
|
wenzelm@30174
|
367 |
(Scan.succeed (Toplevel.no_timing o Toplevel.imperative init));
|
wenzelm@30174
|
368 |
|
wenzelm@30174
|
369 |
val _ =
|
wenzelm@30174
|
370 |
OuterSyntax.improper_command "linear_undo" "undo commands" K.control
|
wenzelm@30174
|
371 |
(Scan.optional P.nat 1 >>
|
wenzelm@30174
|
372 |
(fn n => Toplevel.no_timing o Toplevel.imperative (fn () => linear_undo n)));
|
wenzelm@30174
|
373 |
|
wenzelm@30174
|
374 |
val _ =
|
wenzelm@30174
|
375 |
OuterSyntax.improper_command "undo" "undo commands (skipping closed proofs)" K.control
|
wenzelm@30174
|
376 |
(Scan.optional P.nat 1 >>
|
wenzelm@30174
|
377 |
(fn n => Toplevel.no_timing o Toplevel.imperative (fn () => undo n)));
|
wenzelm@30174
|
378 |
|
wenzelm@30174
|
379 |
val _ =
|
wenzelm@30174
|
380 |
OuterSyntax.improper_command "undos_proof" "undo commands (skipping closed proofs)" K.control
|
wenzelm@30174
|
381 |
(Scan.optional P.nat 1 >> (fn n => Toplevel.no_timing o
|
wenzelm@30174
|
382 |
Toplevel.keep (fn state =>
|
wenzelm@30174
|
383 |
if Toplevel.is_proof state then (undo n; print ()) else raise Toplevel.UNDEF)));
|
wenzelm@30174
|
384 |
|
wenzelm@30174
|
385 |
val _ =
|
wenzelm@30174
|
386 |
OuterSyntax.improper_command "cannot_undo" "partial undo -- Proof General legacy" K.control
|
wenzelm@30174
|
387 |
(P.name >>
|
wenzelm@30174
|
388 |
(fn "end" => Toplevel.no_timing o Toplevel.imperative (fn () => undo 1)
|
wenzelm@30174
|
389 |
| txt => Toplevel.imperative (fn () => error ("Cannot undo " ^ quote txt))));
|
wenzelm@30174
|
390 |
|
wenzelm@30174
|
391 |
val _ =
|
wenzelm@30174
|
392 |
OuterSyntax.improper_command "kill" "kill partial proof or theory development" K.control
|
wenzelm@30174
|
393 |
(Scan.succeed (Toplevel.no_timing o Toplevel.imperative kill));
|
wenzelm@30174
|
394 |
|
wenzelm@30174
|
395 |
|
wenzelm@30174
|
396 |
(* editor model *)
|
wenzelm@30174
|
397 |
|
wenzelm@28300
|
398 |
val _ =
|
wenzelm@29313
|
399 |
OuterSyntax.internal_command "Isar.command"
|
wenzelm@29313
|
400 |
(P.string -- P.string >> (fn (id, text) =>
|
wenzelm@29313
|
401 |
Toplevel.imperative (fn () =>
|
wenzelm@29313
|
402 |
ignore (create_command (OuterSyntax.prepare_command (Position.id id) text)))));
|
wenzelm@28300
|
403 |
|
wenzelm@28300
|
404 |
val _ =
|
wenzelm@29313
|
405 |
OuterSyntax.internal_command "Isar.insert"
|
wenzelm@28300
|
406 |
(P.string -- P.string >> (fn (prev, id) =>
|
wenzelm@29313
|
407 |
Toplevel.imperative (fn () => insert_command prev id)));
|
wenzelm@28300
|
408 |
|
wenzelm@28300
|
409 |
val _ =
|
wenzelm@29313
|
410 |
OuterSyntax.internal_command "Isar.remove"
|
wenzelm@29313
|
411 |
(P.string >> (fn id => Toplevel.imperative (fn () => remove_command id)));
|
wenzelm@28300
|
412 |
|
wenzelm@26605
|
413 |
end;
|
wenzelm@26605
|
414 |
|
wenzelm@28300
|
415 |
end;
|