author | wenzelm |
Fri, 16 Jan 2009 12:10:51 +0100 | |
changeset 29507 | 1684a9c4554f |
parent 29499 | 2819ba5f0c32 |
child 29517 | d7648f30f923 |
permissions | -rw-r--r-- |
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(* Title: Pure/Isar/isar_document.ML |
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Author: Makarius |
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Interactive Isar documents. |
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*) |
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signature ISAR_DOCUMENT = |
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sig |
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type state_id = string |
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type command_id = string |
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type document_id = string |
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val define_command: command_id -> Toplevel.transition -> unit |
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val begin_document: document_id -> Path.T -> unit |
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val end_document: document_id -> unit |
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val edit_document: document_id -> document_id -> (command_id * command_id option) list -> unit |
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end; |
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structure IsarDocument: ISAR_DOCUMENT = |
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struct |
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(* unique identifiers *) |
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type state_id = string; |
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type command_id = string; |
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type document_id = string; |
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fun new_id () = "isabelle:" ^ serial_string (); |
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fun err_dup kind id = error ("Duplicate " ^ kind ^ ": " ^ quote id); |
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fun err_undef kind id = error ("Unknown " ^ kind ^ ": " ^ quote id); |
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||
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(** documents **) |
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(* command entries *) |
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datatype entry = Entry of {next: command_id option, state: state_id option}; |
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fun make_entry next state = Entry {next = next, state = state}; |
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fun the_entry entries (id: command_id) = |
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(case Symtab.lookup entries id of |
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NONE => err_undef "document entry" id |
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| SOME (Entry entry) => entry); |
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fun put_entry (id: command_id, entry: entry) = Symtab.update (id, entry); |
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fun put_entry_state (id: command_id) state entries = |
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let val {next, ...} = the_entry entries id |
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in put_entry (id, make_entry next state) entries end; |
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fun reset_entry_state id = put_entry_state id NONE; |
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fun set_entry_state (id, state_id) = put_entry_state id (SOME state_id); |
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(* document *) |
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datatype document = Document of |
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{dir: Path.T, (*master directory*) |
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name: string, (*theory name*) |
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start: command_id, (*empty start command*) |
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entries: entry Symtab.table}; (*unique command entries indexed by command_id*) |
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fun make_document dir name start entries = |
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Document {dir = dir, name = name, start = start, entries = entries}; |
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fun map_entries f (Document {dir, name, start, entries}) = |
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make_document dir name start (f entries); |
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(* iterate entries *) |
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fun fold_entries id0 f (Document {entries, ...}) = |
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let |
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fun apply NONE x = x |
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| apply (SOME id) x = |
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let val entry = the_entry entries id |
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in apply (#next entry) (f (id, entry) x) end; |
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in if Symtab.defined entries id0 then apply (SOME id0) else I end; |
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fun first_entry P (Document {start, entries, ...}) = |
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let |
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fun find _ NONE = NONE |
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| find prev (SOME id) = |
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let val entry = the_entry entries id |
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in if P (id, entry) then SOME (prev, id) else find (SOME id) (#next entry) end; |
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in find NONE (SOME start) end; |
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(* modify entries *) |
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fun insert_after (id: command_id) (id2: command_id) = map_entries (fn entries => |
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let val {next, state} = the_entry entries id in |
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entries |
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|> put_entry (id, make_entry (SOME id2) state) |
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|> put_entry (id2, make_entry next NONE) |
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end); |
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fun delete_after (id: command_id) = map_entries (fn entries => |
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let val {next, state} = the_entry entries id in |
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(case next of |
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NONE => error ("No next entry to delete: " ^ quote id) |
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| SOME id2 => |
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entries |> |
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(case #next (the_entry entries id2) of |
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NONE => put_entry (id, make_entry NONE state) |
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| SOME id3 => put_entry (id, make_entry (SOME id3) state) #> reset_entry_state id3)) |
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end); |
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(** global configuration **) |
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local |
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val global_states = ref (Symtab.empty: Toplevel.state option future Symtab.table); |
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val global_commands = ref (Symtab.empty: Toplevel.transition Symtab.table); |
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val global_documents = ref (Symtab.empty: document Symtab.table); |
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in |
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fun change_states f = NAMED_CRITICAL "Isar" (fn () => change global_states f); |
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fun get_states () = NAMED_CRITICAL "Isar" (fn () => ! global_states); |
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fun change_commands f = NAMED_CRITICAL "Isar" (fn () => change global_commands f); |
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fun get_commands () = NAMED_CRITICAL "Isar" (fn () => ! global_commands); |
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fun change_documents f = NAMED_CRITICAL "Isar" (fn () => change global_documents f); |
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fun get_documents () = NAMED_CRITICAL "Isar" (fn () => ! global_documents); |
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fun init () = NAMED_CRITICAL "Isar" (fn () => |
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(global_states := Symtab.empty; |
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global_commands := Symtab.empty; |
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global_documents := Symtab.empty)); |
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end; |
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fun define_state (id: state_id) state = |
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change_states (Symtab.update_new (id, state)) |
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handle Symtab.DUP dup => err_dup "state" dup; |
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fun the_state (id: state_id) = |
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(case Symtab.lookup (get_states ()) id of |
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NONE => err_undef "state" id |
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| SOME state => state); |
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fun define_command id tr = |
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change_commands (Symtab.update_new (id, Toplevel.put_id id tr)) |
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handle Symtab.DUP dup => err_dup "command" dup; |
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fun the_command (id: command_id) = |
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(case Symtab.lookup (get_commands ()) id of |
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NONE => err_undef "command" id |
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| SOME tr => tr); |
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fun define_document (id: document_id) document = |
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change_documents (Symtab.update_new (id, document)) |
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handle Symtab.DUP dup => err_dup "document" dup; |
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fun the_document (id: document_id) = |
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(case Symtab.lookup (get_documents ()) id of |
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NONE => err_undef "document" id |
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| SOME (Document doc) => doc); |
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(* begin/end document *) |
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fun begin_document (id: document_id) path = |
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let |
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val (dir, name) = ThyLoad.split_thy_path path; |
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val _ = define_command id Toplevel.empty; |
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val _ = define_state id (Future.value (SOME Toplevel.toplevel)); |
175 |
val entries = Symtab.make [(id, make_entry NONE (SOME id))]; |
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val _ = define_document id (make_document dir name id entries); |
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in () end; |
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fun end_document (id: document_id) = error "FIXME"; |
180 |
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181 |
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182 |
(* document editing *) |
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183 |
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29507 | 184 |
local |
185 |
||
186 |
fun is_changed entries' (id, {next = _, state}) = |
|
187 |
(case try (the_entry entries') id of |
|
188 |
SOME {next = _, state = state'} => state' <> state |
|
189 |
| _ => true); |
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190 |
||
191 |
fun cancel_state (id, {next = _, state = SOME state_id}) () = Future.cancel (the_state state_id) |
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| cancel_state _ () = (); |
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||
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fun update_state tr state state_id' = |
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Future.fork_deps [state] (fn () => |
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(case Future.join state of |
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NONE => NONE |
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| SOME st => Toplevel.run_command (Toplevel.put_id state_id' tr) st)); |
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||
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fun new_state (id, _) (state_id, updates) = |
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let |
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val state_id' = new_id (); |
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val state' = update_state (the_command id) (the_state state_id) state_id'; |
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val _ = define_state state_id' state'; |
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in (state_id', (id, state_id') :: updates) end; |
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fun update_states old_document new_document = |
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let |
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fun cancel_old id = fold_entries id cancel_state old_document (); |
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||
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val Document {entries = old_entries, ...} = old_document; |
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val Document {entries = new_entries, ...} = new_document; |
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in |
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(case first_entry (is_changed old_entries) new_document of |
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NONE => |
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(case first_entry (is_changed new_entries) old_document of |
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NONE => ([], new_document) |
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| SOME (_, id) => (cancel_old id; ([], new_document))) |
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| SOME (prev, id) => |
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let |
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val _ = cancel_old id; |
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val prev_state_id = the (#state (the_entry new_entries (the prev))); |
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val (_, updates) = fold_entries id new_state new_document (prev_state_id, []); |
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val new_document' = new_document |> map_entries (fold set_entry_state updates); |
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in (rev updates, new_document') end) |
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end; |
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fun report_updates _ [] = () |
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| report_updates (document_id: document_id) updates = |
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implode (map (fn (id, state_id) => Markup.markup (Markup.edit id state_id) "") updates) |
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|> Markup.markup (Markup.edits document_id) |
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|> Output.status; |
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|
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in |
235 |
||
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fun edit_document (id: document_id) (id': document_id) edits = |
237 |
let |
|
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val document = Document (the_document id); |
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val (updates, document') = |
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document |
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|> fold (fn (id, SOME id2) => insert_after id id2 | (id, NONE) => delete_after id) edits |
242 |
|> update_states document; |
|
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val _ = define_document id' document'; |
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val _ = report_updates id' updates; |
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in () end; |
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246 |
|
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end; |
248 |
||
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249 |
|
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250 |
|
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251 |
(** concrete syntax **) |
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|
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local structure P = OuterParse structure V = ValueParse in |
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254 |
|
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val _ = |
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OuterSyntax.internal_command "Isar.define_command" |
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(P.string -- P.string >> (fn (id, text) => |
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Toplevel.imperative (fn () => |
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define_command id (OuterSyntax.prepare_command (Position.id id) text)))); |
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260 |
|
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val _ = |
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OuterSyntax.internal_command "Isar.begin_document" |
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263 |
(P.string -- P.string >> (fn (id, path) => |
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Toplevel.imperative (fn () => begin_document id (Path.explode path)))); |
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|
265 |
|
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|
266 |
val _ = |
29468 | 267 |
OuterSyntax.internal_command "Isar.end_document" |
268 |
(P.string >> (fn id => Toplevel.imperative (fn () => end_document id))); |
|
269 |
||
270 |
val _ = |
|
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|
271 |
OuterSyntax.internal_command "Isar.edit_document" |
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272 |
(P.string -- P.string -- V.list (P.string -- (P.string >> SOME) || P.string >> rpair NONE) |
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273 |
>> (fn ((id, new_id), edits) => Toplevel.imperative (fn () => edit_document id new_id edits))); |
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|
274 |
|
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|
275 |
end; |
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|
276 |
|
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|
277 |
end; |
29467 | 278 |