author  wenzelm 
Sat, 13 Aug 2011 13:42:35 +0200  
changeset 44180  a6dc270d3edb 
parent 44160  8848867501fb 
child 44182  ecb51b457064 
permissions  rwrr 
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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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type id = int 
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type version_id = id 
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type command_id = id 
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type exec_id = id 
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val no_id: id 
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val new_id: unit > id 
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val parse_id: string > id 
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val print_id: id > string 
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type node_header = string * string list * string list 
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datatype node_edit = 
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Remove  
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Edits of (command_id option * command_id option) list  
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Update_Header of node_header Exn.result 
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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 get_theory: state > version_id > Position.T > string > theory 
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val cancel_execution: state > unit > unit 
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val define_command: command_id > string > state > state 
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val edit: version_id > version_id > edit list > state > (command_id * exec_id) list * state 
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val execute: version_id > state > 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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(* unique identifiers *) 
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type id = int; 
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type version_id = id; 
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type command_id = id; 
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type exec_id = id; 
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val no_id = 0; 
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val new_id = Synchronized.counter (); 
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val parse_id = Markup.parse_int; 
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val print_id = Markup.print_int; 
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fun err_dup kind id = error ("Duplicate " ^ kind ^ ": " ^ print_id id); 
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fun err_undef kind id = error ("Undefined " ^ kind ^ ": " ^ print_id id); 
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(** document structure **) 
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type node_header = string * string list * string list; 
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structure Entries = Linear_Set(type key = command_id val ord = int_ord); 
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abstype node = Node of 
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{header: node_header Exn.result, 
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entries: exec_id option Entries.T, (*command entries with excecutions*) 

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last: exec_id} (*last entry with main result*) 

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and version = Version of node Graph.T (*development graph wrt. static imports*) 
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fun make_node (header, entries, last) = 
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Node {header = header, entries = entries, last = last}; 

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fun map_node f (Node {header, entries, last}) = 
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make_node (f (header, entries, last)); 

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fun get_header (Node {header, ...}) = header; 
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fun set_header header = map_node (fn (_, entries, last) => (header, entries, last)); 

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fun map_entries f (Node {header, entries, last}) = make_node (header, f entries, last); 

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fun fold_entries start f (Node {entries, ...}) = Entries.fold start f entries; 
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fun first_entry start P (Node {entries, ...}) = Entries.get_first start P entries; 

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fun get_last (Node {last, ...}) = last; 
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fun set_last last = map_node (fn (header, entries, _) => (header, entries, last)); 

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val empty_node = make_node (Exn.Exn (ERROR "Bad theory header"), Entries.empty, no_id); 

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val empty_version = Version Graph.empty; 
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(* node edits and associated executions *) 
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datatype node_edit = 
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Remove  
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Edits of (command_id option * command_id option) list  
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Update_Header of node_header Exn.result; 
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type edit = string * node_edit; 
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fun the_entry (Node {entries, ...}) id = 
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(case Entries.lookup entries id of 
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NONE => err_undef "command entry" id 
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 SOME entry => entry); 
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fun update_entry (id, exec_id) = 
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map_entries (Entries.update (id, SOME exec_id)); 

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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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fun nodes_of (Version nodes) = nodes; 
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val node_names_of = Graph.keys o nodes_of; 
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fun get_node version name = Graph.get_node (nodes_of version) name 
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handle Graph.UNDEF _ => empty_node; 
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fun update_node name f = 
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Graph.default_node (name, empty_node) #> Graph.map_node name f; 

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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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Remove => perhaps (try (Graph.del_node name)) nodes 
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 Edits edits => update_node name (edit_node edits) nodes 
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(* FIXME maintain deps; cycles!? *) 

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 Update_Header header => update_node name (set_header header) nodes); 

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fun put_node name node (Version nodes) = 
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Version (nodes 
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> Graph.default_node (name, empty_node) 

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> Graph.map_node name (K node)); 

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end; 
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(** global state  document structure and execution process **) 
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abstype state = State of 
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{versions: version Inttab.table, (*version_id > document content*) 
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commands: Toplevel.transition future Inttab.table, (*command_id > transition (future parsing)*) 
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execs: (bool * Toplevel.state) lazy Inttab.table, (*exec_id > execution process*) 
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execution: unit future list} (*global execution process*) 

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with 
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fun make_state (versions, commands, execs, execution) = 
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State {versions = versions, commands = commands, execs = execs, execution = execution}; 
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fun map_state f (State {versions, commands, execs, execution}) = 
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make_state (f (versions, commands, execs, execution)); 
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val init_state = 
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make_state (Inttab.make [(no_id, empty_version)], 
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Inttab.make [(no_id, Future.value Toplevel.empty)], 
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Inttab.make [(no_id, Lazy.value (true, Toplevel.toplevel))], 
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[]); 
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(* document versions *) 
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fun define_version (id: version_id) version = 
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map_state (fn (versions, commands, execs, execution) => 
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let val versions' = Inttab.update_new (id, version) versions 
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handle Inttab.DUP dup => err_dup "document version" dup 
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in (versions', commands, execs, execution) end); 
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fun the_version (State {versions, ...}) (id: version_id) = 
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(case Inttab.lookup versions id of 
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NONE => err_undef "document version" id 
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 SOME version => version); 
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(* commands *) 
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fun define_command (id: command_id) text = 
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map_state (fn (versions, commands, execs, execution) => 
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let 
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val id_string = print_id id; 
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val tr = Future.fork_pri 2 (fn () => 
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Position.setmp_thread_data (Position.id_only id_string) 
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(fn () => Outer_Syntax.prepare_command (Position.id id_string) text) ()); 
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val commands' = 
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Inttab.update_new (id, tr) commands 
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handle Inttab.DUP dup => err_dup "command" dup; 
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in (versions, commands', execs, execution) end); 
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fun the_command (State {commands, ...}) (id: command_id) = 
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(case Inttab.lookup commands id of 
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NONE => err_undef "command" id 
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 SOME tr => tr); 
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fun join_commands (State {commands, ...}) = 
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Inttab.fold (fn (_, tr) => fn () => ignore (Future.join_result tr)) commands (); 
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(* command executions *) 
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fun define_exec (id: exec_id) exec = 
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map_state (fn (versions, commands, execs, execution) => 
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let val execs' = Inttab.update_new (id, exec) execs 
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handle Inttab.DUP dup => err_dup "command execution" dup 
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in (versions, commands, execs', execution) end); 
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fun the_exec (State {execs, ...}) (id: exec_id) = 
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(case Inttab.lookup execs id of 
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NONE => err_undef "command execution" id 
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 SOME exec => exec); 
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43668  215 
fun get_theory state version_id pos name = 
216 
let 

217 
val last = get_last (get_node (the_version state version_id) name); 

44180  218 
val st = 
219 
(case Lazy.peek (the_exec state last) of 

220 
SOME result => #2 (Exn.release result) 

221 
 NONE => error ("Unfinished execution for theory " ^ quote name)); 

43668  222 
in Toplevel.end_theory pos st end; 
223 

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(* document execution *) 
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43666  227 
fun cancel_execution (State {execution, ...}) = 
228 
(List.app Future.cancel execution; 

229 
fn () => ignore (Future.join_results execution)); 

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end; 
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(* toplevel transactions *) 
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local 
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fun timing tr t = Toplevel.status tr (Markup.timing t); 
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fun proof_status tr st = 
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(case try Toplevel.proof_of st of 
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SOME prf => Toplevel.status tr (Proof.status_markup prf) 
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 NONE => ()); 
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fun async_state tr st = 
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ignore 
41673  248 
(singleton 
41674  249 
(Future.forks {name = "Document.async_state", 
44113  250 
group = SOME (Task_Queue.new_group NONE), deps = [], pri = 0, interrupts = true}) 
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(fn () => 
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Toplevel.setmp_thread_position tr 
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(fn () => Toplevel.print_state false st) ())); 
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40390  255 
fun run int tr st = 
256 
(case Toplevel.transition int tr st of 

257 
SOME (st', NONE) => ([], SOME st') 

258 
 SOME (_, SOME exn_info) => 

259 
(case ML_Compiler.exn_messages (Runtime.EXCURSION_FAIL exn_info) of 

260 
[] => Exn.interrupt () 

261 
 errs => (errs, NONE)) 

262 
 NONE => ([ML_Compiler.exn_message Runtime.TERMINATE], NONE)); 

263 

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in 
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fun run_command node_name raw_tr st = 
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(case 
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(case Toplevel.init_of raw_tr of 
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SOME _ => 
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Exn.capture (fn () => 
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let val master_dir = Path.dir (Path.explode node_name); (* FIXME move to Scala side *) 
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in Toplevel.modify_master (SOME master_dir) raw_tr end) () 
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 NONE => Exn.Res raw_tr) of 
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Exn.Res tr => 
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let 
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val is_init = is_some (Toplevel.init_of tr); 
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val is_proof = Keyword.is_proof (Toplevel.name_of tr); 
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val do_print = not is_init andalso (Toplevel.print_of tr orelse is_proof); 
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val start = Timing.start (); 
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val (errs, result) = 
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if Toplevel.is_toplevel st andalso not is_init then ([], SOME st) 
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else run (is_init orelse is_proof) (Toplevel.set_print false tr) st; 
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val _ = timing tr (Timing.result start); 
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val _ = List.app (Toplevel.error_msg tr) errs; 
40398  286 
val res = 
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(case result of 
40398  288 
NONE => (Toplevel.status tr Markup.failed; (false, st)) 
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 SOME st' => 
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(Toplevel.status tr Markup.finished; 
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proof_status tr st'; 
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if do_print then async_state tr st' else (); 
40398  293 
(true, st'))); 
294 
in res end 

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 Exn.Exn exn => 
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if Exn.is_interrupt exn then reraise exn 
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else 
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(Toplevel.error_msg raw_tr (ML_Compiler.exn_message exn); 
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Toplevel.status raw_tr Markup.failed; 
40398  300 
(false, Toplevel.toplevel))); 
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end; 
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303 

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304 

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(** editing **) 
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(* edit *) 
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local 
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312 

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fun is_changed node' ((_, id), exec) = 
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(case try (the_entry node') id of 
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NONE => true 
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 SOME exec' => exec' <> exec); 
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317 

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fun new_exec name (id: command_id) (exec_id, updates, state) = 
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let 
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val exec = the_exec state exec_id; 
38419  321 
val exec_id' = new_id (); 
38449  322 
val future_tr = the_command state id; 
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val exec' = 
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Lazy.lazy (fn () => 
40398  325 
let 
326 
val st = #2 (Lazy.force exec); 

327 
val exec_tr = Toplevel.put_id (print_id exec_id') (Future.join future_tr); 

328 
in run_command name exec_tr st end); 

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val state' = define_exec exec_id' exec' state; 
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in (exec_id', (id, exec_id') :: updates, state') end; 
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in 
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333 

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fun edit (old_id: version_id) (new_id: version_id) edits state = 
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let 
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val old_version = the_version state old_id; 
44180  337 
val _ = Time.now (); (* FIXME odd workaround for polyml5.4.0/x86_64 *) 
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val new_version = fold edit_nodes edits old_version; 
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339 

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fun update_node name (rev_updates, version, st) = 
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let val node = get_node version name in 
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(case first_entry NONE (is_changed (get_node old_version name)) node of 
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NONE => (rev_updates, version, st) 
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 SOME ((prev, id), _) => 
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let 
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val prev_exec = 
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(case prev of 
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NONE => no_id 
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 SOME prev_id => the_default no_id (the_entry node prev_id)); 
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val (last, rev_upds, st') = 
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fold_entries (SOME id) (new_exec name o #2 o #1) node (prev_exec, [], st); 
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val node' = node > fold update_entry rev_upds > set_last last; 
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in (rev_upds @ rev_updates, put_node name node' version, st') end) 
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end; 
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(* FIXME proper node deps *) 
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val (rev_updates, new_version', state') = 
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fold update_node (node_names_of new_version) ([], new_version, state); 
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val state'' = define_version new_id new_version' state'; 
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val _ = join_commands state''; (* FIXME async!? *) 
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in (rev rev_updates, state'') end; 
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end; 
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366 

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(* execute *) 
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fun execute version_id state = 
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state > map_state (fn (versions, commands, execs, _) => 
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let 
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val version = the_version state version_id; 
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fun force_exec NONE = () 
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 force_exec (SOME exec_id) = ignore (Lazy.force (the_exec state exec_id)); 
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44180  377 
val execution' = (* FIXME Graph.schedule *) 
44113  378 
Future.forks 
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{name = "Document.execute", group = NONE, deps = [], pri = 1, interrupts = true} 

41673  380 
[fn () => 
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node_names_of version > List.app (fn name => 
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fold_entries NONE (fn (_, exec) => fn () => force_exec exec) 

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(get_node version name) ())]; 

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in (versions, commands, execs, execution') end); 
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(** global state **) 
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val global_state = Synchronized.var "Document" init_state; 
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fun state () = Synchronized.value global_state; 
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val change_state = Synchronized.change global_state; 
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end; 
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397 