(* Title: Pure/PIDE/document.ML
Author: Makarius
Document as collection of named nodes, each consisting of an editable
list of commands, associated with asynchronous execution process.
*)
signature DOCUMENT =
sig
val timing: bool Unsynchronized.ref
type node_header = {master: string, header: Thy_Header.header, errors: string list}
type overlay = Document_ID.command * (string * string list)
datatype node_edit =
Edits of (Document_ID.command option * Document_ID.command option) list |
Deps of node_header |
Perspective of bool * Document_ID.command list * overlay list
type edit = string * node_edit
type state
val init_state: state
val define_blob: string -> string -> state -> state
type blob_digest = (string * string option) Exn.result
val define_command: Document_ID.command -> string -> blob_digest list -> int ->
((int * int) * string) list -> state -> state
val command_exec: state -> string -> Document_ID.command -> Command.exec option
val remove_versions: Document_ID.version list -> state -> state
val start_execution: state -> state
val update: Document_ID.version -> Document_ID.version -> edit list -> bool -> state ->
Document_ID.exec list * (Document_ID.command * Document_ID.exec list) list * state
val state: unit -> state
val change_state: (state -> state) -> unit
end;
structure Document: DOCUMENT =
struct
val timing = Unsynchronized.ref false;
fun timeit msg e = cond_timeit (! timing) msg e;
(** document structure **)
fun err_dup kind id = error ("Duplicate " ^ kind ^ ": " ^ Document_ID.print id);
fun err_undef kind id = error ("Undefined " ^ kind ^ ": " ^ Document_ID.print id);
type node_header =
{master: string, header: Thy_Header.header, errors: string list};
type perspective =
{required: bool, (*required node*)
visible: Inttab.set, (*visible commands*)
visible_last: Document_ID.command option, (*last visible command*)
overlays: (string * string list) list Inttab.table}; (*command id -> print functions with args*)
structure Entries = Linear_Set(type key = Document_ID.command val ord = int_ord);
abstype node = Node of
{header: node_header, (*master directory, theory header, errors*)
keywords: Keyword.keywords option, (*outer syntax keywords*)
perspective: perspective, (*command perspective*)
entries: Command.exec option Entries.T, (*command entries with executions*)
result: (Document_ID.command * Command.eval) option, (*result of last execution*)
consolidated: unit lazy} (*consolidated status of eval forks*)
and version = Version of node String_Graph.T (*development graph wrt. static imports*)
with
fun make_node (header, keywords, perspective, entries, result, consolidated) =
Node {header = header, keywords = keywords, perspective = perspective,
entries = entries, result = result, consolidated = consolidated};
fun map_node f (Node {header, keywords, perspective, entries, result, consolidated}) =
make_node (f (header, keywords, perspective, entries, result, consolidated));
fun make_perspective (required, command_ids, overlays) : perspective =
{required = required,
visible = Inttab.make_set command_ids,
visible_last = try List.last command_ids,
overlays = Inttab.make_list overlays};
val no_header: node_header =
{master = "", header = Thy_Header.make ("", Position.none) [] [], errors = []};
val no_perspective = make_perspective (false, [], []);
val empty_node =
make_node (no_header, NONE, no_perspective, Entries.empty, NONE, Lazy.value ());
fun is_no_perspective ({required, visible, visible_last, overlays}: perspective) =
not required andalso
Inttab.is_empty visible andalso
is_none visible_last andalso
Inttab.is_empty overlays;
fun is_empty_node (Node {header, keywords, perspective, entries, result, consolidated}) =
header = no_header andalso
is_none keywords andalso
is_no_perspective perspective andalso
Entries.is_empty entries andalso
is_none result andalso
Lazy.is_finished consolidated;
(* basic components *)
fun master_directory (Node {header = {master, ...}, ...}) =
(case try Url.explode master of
SOME (Url.File path) => path
| _ => Path.current);
fun set_header master header errors =
map_node (fn (_, keywords, perspective, entries, result, consolidated) =>
({master = master, header = header, errors = errors},
keywords, perspective, entries, result, consolidated));
fun get_header (Node {header, ...}) = header;
fun set_keywords keywords =
map_node (fn (header, _, perspective, entries, result, consolidated) =>
(header, keywords, perspective, entries, result, consolidated));
fun get_keywords (Node {keywords, ...}) = keywords;
fun read_header node span =
let
val {header, errors, ...} = get_header node;
val _ =
if null errors then ()
else
cat_lines errors |>
(case Position.get_id (Position.thread_data ()) of
NONE => I
| SOME id => Protocol_Message.command_positions_yxml id)
|> error;
val {name = (name, _), imports, ...} = header;
val {name = (_, pos), imports = imports', keywords} =
Thy_Header.read_tokens Position.none span;
val imports'' = (map #1 imports ~~ map #2 imports') handle ListPair.UnequalLengths => imports;
in Thy_Header.make (name, pos) imports'' keywords end;
fun get_perspective (Node {perspective, ...}) = perspective;
fun set_perspective args =
map_node (fn (header, keywords, _, entries, result, consolidated) =>
(header, keywords, make_perspective args, entries, result, consolidated));
val required_node = #required o get_perspective;
val visible_command = Inttab.defined o #visible o get_perspective;
val visible_last = #visible_last o get_perspective;
val visible_node = is_some o visible_last
val overlays = Inttab.lookup_list o #overlays o get_perspective;
fun map_entries f =
map_node (fn (header, keywords, perspective, entries, result, consolidated) =>
(header, keywords, perspective, f entries, result, consolidated));
fun get_entries (Node {entries, ...}) = entries;
fun iterate_entries f = Entries.iterate NONE f o get_entries;
fun iterate_entries_after start f (Node {entries, ...}) =
(case Entries.get_after entries start of
NONE => I
| SOME id => Entries.iterate (SOME id) f entries);
fun get_result (Node {result, ...}) = result;
fun set_result result =
map_node (fn (header, keywords, perspective, entries, _, consolidated) =>
(header, keywords, perspective, entries, result, consolidated));
fun pending_result node =
(case get_result node of
SOME (_, eval) => not (Command.eval_finished eval)
| NONE => false);
fun finished_result node =
(case get_result node of
SOME (_, eval) => Command.eval_finished eval
| NONE => false);
fun finished_result_theory node =
if finished_result node then
let
val (result_id, eval) = the (get_result node);
val st = Command.eval_result_state eval;
in SOME (result_id, Toplevel.end_theory Position.none st) handle ERROR _ => NONE end
else NONE;
val reset_consolidated =
map_node (fn (header, keywords, perspective, entries, result, _) =>
(header, keywords, perspective, entries, result, Lazy.lazy I));
fun get_consolidated (Node {consolidated, ...}) = consolidated;
val is_consolidated = Lazy.is_finished o get_consolidated;
fun commit_consolidated node =
(Lazy.force (get_consolidated node); Output.status (Markup.markup_only Markup.consolidated));
fun could_consolidate node =
not (is_consolidated node) andalso is_some (finished_result_theory node);
fun get_node nodes name = String_Graph.get_node nodes name
handle String_Graph.UNDEF _ => empty_node;
fun default_node name = String_Graph.default_node (name, empty_node);
fun update_node name f = default_node name #> String_Graph.map_node name f;
(* node edits and associated executions *)
type overlay = Document_ID.command * (string * string list);
datatype node_edit =
Edits of (Document_ID.command option * Document_ID.command option) list |
Deps of node_header |
Perspective of bool * Document_ID.command list * overlay list;
type edit = string * node_edit;
val after_entry = Entries.get_after o get_entries;
fun lookup_entry node id =
(case Entries.lookup (get_entries node) id of
NONE => NONE
| SOME (exec, _) => exec);
fun the_entry node id =
(case Entries.lookup (get_entries node) id of
NONE => err_undef "command entry" id
| SOME (exec, _) => exec);
fun assign_entry (command_id, exec) node =
if is_none (Entries.lookup (get_entries node) command_id) then node
else map_entries (Entries.update (command_id, exec)) node;
fun reset_after id entries =
(case Entries.get_after entries id of
NONE => entries
| SOME next => Entries.update (next, NONE) entries);
val edit_node = map_entries o fold
(fn (id, SOME id2) => Entries.insert_after id (id2, NONE)
| (id, NONE) => Entries.delete_after id #> reset_after id);
(* version operations *)
val empty_version = Version String_Graph.empty;
fun nodes_of (Version nodes) = nodes;
val node_of = get_node o nodes_of;
fun cycle_msg names = "Cyclic dependency of " ^ space_implode " via " (map quote names);
fun edit_nodes (name, node_edit) (Version nodes) =
Version
(case node_edit of
Edits edits => update_node name (edit_node edits) nodes
| Deps {master, header, errors} =>
let
val imports = map fst (#imports header);
val nodes1 = nodes
|> default_node name
|> fold default_node imports;
val nodes2 = nodes1
|> String_Graph.Keys.fold
(fn dep => String_Graph.del_edge (dep, name)) (String_Graph.imm_preds nodes1 name);
val (nodes3, errors1) =
(String_Graph.add_deps_acyclic (name, imports) nodes2, errors)
handle String_Graph.CYCLES cs => (nodes2, errors @ map cycle_msg cs);
in String_Graph.map_node name (set_header master header errors1) nodes3 end
| Perspective perspective => update_node name (set_perspective perspective) nodes);
fun update_keywords name nodes =
nodes |> String_Graph.map_node name (fn node =>
if is_empty_node node then node
else
let
val {master, header, errors} = get_header node;
val imports_keywords = map_filter (get_keywords o get_node nodes o #1) (#imports header);
val keywords =
Library.foldl Keyword.merge_keywords (Session.get_keywords (), imports_keywords);
val (keywords', errors') =
(Keyword.add_keywords (#keywords header) keywords, errors)
handle ERROR msg =>
(keywords, if member (op =) errors msg then errors else errors @ [msg]);
in
node
|> set_header master header errors'
|> set_keywords (SOME keywords')
end);
fun edit_keywords edits (Version nodes) =
Version
(fold update_keywords
(String_Graph.all_succs nodes (map_filter (fn (a, Deps _) => SOME a | _ => NONE) edits))
nodes);
fun put_node (name, node) (Version nodes) =
let
val nodes1 = update_node name (K node) nodes;
val nodes2 =
if String_Graph.is_maximal nodes1 name andalso is_empty_node node
then String_Graph.del_node name nodes1
else nodes1;
in Version nodes2 end;
end;
(** main state -- document structure and execution process **)
type blob_digest = (string * string option) Exn.result; (*file node name, raw digest*)
type execution =
{version_id: Document_ID.version, (*static version id*)
execution_id: Document_ID.execution, (*dynamic execution id*)
delay_request: unit future, (*pending event timer request*)
parallel_prints: Command.exec list}; (*parallel prints for early execution*)
val no_execution: execution =
{version_id = Document_ID.none,
execution_id = Document_ID.none,
delay_request = Future.value (),
parallel_prints = []};
fun new_execution version_id delay_request parallel_prints : execution =
{version_id = version_id,
execution_id = Execution.start (),
delay_request = delay_request,
parallel_prints = parallel_prints};
abstype state = State of
{versions: version Inttab.table, (*version id -> document content*)
blobs: (SHA1.digest * string list) Symtab.table, (*raw digest -> digest, lines*)
commands: (string * blob_digest list * int * Token.T list lazy) Inttab.table,
(*command id -> name, inlined files, token index of files, command span*)
execution: execution} (*current execution process*)
with
fun make_state (versions, blobs, commands, execution) =
State {versions = versions, blobs = blobs, commands = commands, execution = execution};
fun map_state f (State {versions, blobs, commands, execution}) =
make_state (f (versions, blobs, commands, execution));
val init_state =
make_state (Inttab.make [(Document_ID.none, empty_version)],
Symtab.empty, Inttab.empty, no_execution);
(* document versions *)
fun parallel_prints_node node =
iterate_entries (fn (_, opt_exec) => fn rev_result =>
(case opt_exec of
SOME (eval, prints) =>
(case filter Command.parallel_print prints of
[] => SOME rev_result
| prints' => SOME ((eval, prints') :: rev_result))
| NONE => NONE)) node [] |> rev;
fun define_version version_id version assigned_nodes =
map_state (fn (versions, blobs, commands, {delay_request, ...}) =>
let
val version' = fold put_node assigned_nodes version;
val versions' = Inttab.update_new (version_id, version') versions
handle Inttab.DUP dup => err_dup "document version" dup;
val parallel_prints = maps (parallel_prints_node o #2) assigned_nodes;
val execution' = new_execution version_id delay_request parallel_prints;
in (versions', blobs, commands, execution') end);
fun the_version (State {versions, ...}) version_id =
(case Inttab.lookup versions version_id of
NONE => err_undef "document version" version_id
| SOME version => version);
fun delete_version version_id versions =
Inttab.delete version_id versions
handle Inttab.UNDEF _ => err_undef "document version" version_id;
(* inlined files *)
fun define_blob digest text =
map_state (fn (versions, blobs, commands, execution) =>
let val blobs' = Symtab.update (digest, (SHA1.fake digest, split_lines text)) blobs
in (versions, blobs', commands, execution) end);
fun the_blob (State {blobs, ...}) digest =
(case Symtab.lookup blobs digest of
NONE => error ("Undefined blob: " ^ digest)
| SOME content => content);
fun resolve_blob state (blob_digest: blob_digest) =
blob_digest |> Exn.map_res (fn (file_node, raw_digest) =>
(file_node, Option.map (the_blob state) raw_digest));
fun blob_reports pos (blob_digest: blob_digest) =
(case blob_digest of Exn.Res (file_node, _) => [(pos, Markup.path file_node)] | _ => []);
(* commands *)
fun define_command command_id name blobs_digests blobs_index toks =
map_state (fn (versions, blobs, commands, execution) =>
let
val id = Document_ID.print command_id;
val span =
Lazy.lazy_name "Document.define_command" (fn () =>
Position.setmp_thread_data (Position.id_only id)
(fn () =>
let
val (tokens, _) = fold_map Token.make toks (Position.id id);
val _ =
if blobs_index < 0
then (*inlined errors*)
map_filter Exn.get_exn blobs_digests
|> List.app (Output.error_message o Runtime.exn_message)
else (*auxiliary files*)
let val pos = Token.pos_of (nth tokens blobs_index)
in Position.reports (maps (blob_reports pos) blobs_digests) end;
in tokens end) ());
val commands' =
Inttab.update_new (command_id, (name, blobs_digests, blobs_index, span)) commands
handle Inttab.DUP dup => err_dup "command" dup;
val _ =
Position.setmp_thread_data (Position.id_only id)
(fn () => Output.status (Markup.markup_only Markup.accepted)) ();
in (versions, blobs, commands', execution) end);
fun the_command (State {commands, ...}) command_id =
(case Inttab.lookup commands command_id of
NONE => err_undef "command" command_id
| SOME command => command);
val the_command_name = #1 oo the_command;
(* execution *)
fun get_execution (State {execution, ...}) = execution;
fun get_execution_version state = the_version state (#version_id (get_execution state));
fun command_exec state node_name command_id =
let
val version = get_execution_version state;
val node = get_node (nodes_of version) node_name;
in the_entry node command_id end;
end;
(* remove_versions *)
fun remove_versions version_ids state = state |> map_state (fn (versions, _, _, execution) =>
let
val _ =
member (op =) version_ids (#version_id execution) andalso
error ("Attempt to remove execution version " ^ Document_ID.print (#version_id execution));
val versions' = fold delete_version version_ids versions;
val commands' =
(versions', Inttab.empty) |->
Inttab.fold (fn (_, version) => nodes_of version |>
String_Graph.fold (fn (_, (node, _)) => node |>
iterate_entries (fn ((_, command_id), _) =>
SOME o Inttab.insert (K true) (command_id, the_command state command_id))));
val blobs' =
(commands', Symtab.empty) |->
Inttab.fold (fn (_, (_, blobs, _, _)) => blobs |>
fold (fn Exn.Res (_, SOME b) => Symtab.update (b, the_blob state b) | _ => I));
in (versions', blobs', commands', execution) end);
(* document execution *)
fun make_required nodes =
let
fun all_preds P =
String_Graph.fold (fn (a, (node, _)) => P node ? cons a) nodes []
|> String_Graph.all_preds nodes
|> Symtab.make_set;
val all_visible = all_preds visible_node;
val all_required = all_preds required_node;
in
Symtab.fold (fn (a, ()) =>
exists (Symtab.defined all_visible) (String_Graph.immediate_succs nodes a) ?
Symtab.update (a, ())) all_visible all_required
end;
fun start_execution state = state |> map_state (fn (versions, blobs, commands, execution) =>
timeit "Document.start_execution" (fn () =>
let
val {version_id, execution_id, delay_request, parallel_prints} = execution;
val delay = seconds (Options.default_real "editor_execution_delay");
val _ = Future.cancel delay_request;
val delay_request' = Event_Timer.future (Time.now () + delay);
val delay = Future.task_of delay_request';
val parallel_prints' = parallel_prints
|> map_filter (Command.exec_parallel_prints execution_id [delay]);
fun finished_import (name, (node, _)) =
finished_result node orelse is_some (Thy_Info.lookup_theory name);
val nodes = nodes_of (the_version state version_id);
val required = make_required nodes;
val _ =
nodes |> String_Graph.schedule
(fn deps => fn (name, node) =>
if Symtab.defined required name orelse visible_node node orelse pending_result node then
let
fun body () =
(Execution.worker_task_active true name;
if forall finished_import deps then
iterate_entries (fn (_, opt_exec) => fn () =>
(case opt_exec of
SOME exec =>
if Execution.is_running execution_id
then SOME (Command.exec execution_id exec)
else NONE
| NONE => NONE)) node ()
else ();
Execution.worker_task_active false name)
handle exn =>
(Output.system_message (Runtime.exn_message exn);
Execution.worker_task_active false name;
Exn.reraise exn);
val future =
(singleton o Future.forks)
{name = "theory:" ^ name,
group = SOME (Future.new_group NONE),
deps = delay :: Execution.active_tasks name @ maps (the_list o #2 o #2) deps,
pri = 0, interrupts = false} body;
in (node, SOME (Future.task_of future)) end
else (node, NONE));
val execution' =
{version_id = version_id, execution_id = execution_id,
delay_request = delay_request', parallel_prints = parallel_prints'};
in (versions, blobs, commands, execution') end));
(** document update **)
(* exec state assignment *)
type assign_update = Command.exec option Inttab.table; (*command id -> exec*)
val assign_update_empty: assign_update = Inttab.empty;
fun assign_update_defined (tab: assign_update) command_id = Inttab.defined tab command_id;
fun assign_update_change entry (tab: assign_update) = Inttab.update entry tab;
fun assign_update_apply (tab: assign_update) node = Inttab.fold assign_entry tab node;
fun assign_update_new upd (tab: assign_update) =
Inttab.update_new upd tab
handle Inttab.DUP dup => err_dup "exec state assignment" dup;
fun assign_update_result (tab: assign_update) =
Inttab.fold (fn (command_id, exec) => cons (command_id, Command.exec_ids exec)) tab [];
(* update *)
local
fun init_theory deps node span =
let
val master_dir = master_directory node;
val header = read_header node span;
val imports = #imports header;
fun maybe_end_theory pos st =
SOME (Toplevel.end_theory pos st)
handle ERROR msg => (Output.error_message msg; NONE);
val parents_reports =
imports |> map_filter (fn (import, pos) =>
(case Thy_Info.lookup_theory import of
NONE =>
maybe_end_theory pos
(case get_result (snd (the (AList.lookup (op =) deps import))) of
NONE => Toplevel.toplevel
| SOME (_, eval) => Command.eval_result_state eval)
| some => some)
|> Option.map (fn thy => (thy, (pos, Theory.get_markup thy))));
val parents =
if null parents_reports then [Theory.get_pure ()] else map #1 parents_reports;
val _ = Position.reports (map #2 parents_reports);
val thy = Resources.begin_theory master_dir header parents;
val _ = Output.status (Markup.markup_only Markup.initialized);
in thy end;
fun check_root_theory node =
let
val master_dir = master_directory node;
val header = #header (get_header node);
val header_name = #1 (#name header);
val parent =
if header_name = Sessions.root_name then
SOME (Thy_Info.get_theory Sessions.theory_name)
else if member (op =) Thy_Header.ml_roots header_name then
SOME (Thy_Info.get_theory Thy_Header.ml_bootstrapN)
else NONE;
in parent |> Option.map (fn thy => Resources.begin_theory master_dir header [thy]) end;
fun check_theory full name node =
is_some (Thy_Info.lookup_theory name) orelse
null (#errors (get_header node)) andalso (not full orelse is_some (get_result node));
fun last_common keywords state node_required node0 node =
let
fun update_flags prev (visible, initial) =
let
val visible' = visible andalso prev <> visible_last node;
val initial' = initial andalso
(case prev of
NONE => true
| SOME command_id => the_command_name state command_id <> Thy_Header.theoryN);
in (visible', initial') end;
fun get_common ((prev, command_id), opt_exec) (_, ok, flags, assign_update) =
if ok then
let
val flags' as (visible', _) = update_flags prev flags;
val ok' =
(case (lookup_entry node0 command_id, opt_exec) of
(SOME (eval0, _), SOME (eval, _)) =>
Command.eval_eq (eval0, eval) andalso
(visible' orelse node_required orelse Command.eval_running eval)
| _ => false);
val assign_update' = assign_update |> ok' ?
(case opt_exec of
SOME (eval, prints) =>
let
val command_visible = visible_command node command_id;
val command_overlays = overlays node command_id;
val command_name = the_command_name state command_id;
in
(case
Command.print command_visible command_overlays keywords command_name eval prints
of
SOME prints' => assign_update_new (command_id, SOME (eval, prints'))
| NONE => I)
end
| NONE => I);
in SOME (prev, ok', flags', assign_update') end
else NONE;
val (common, ok, flags, assign_update') =
iterate_entries get_common node (NONE, true, (true, true), assign_update_empty);
val (common', flags') =
if ok then
let val last = Entries.get_after (get_entries node) common
in (last, update_flags last flags) end
else (common, flags);
in (assign_update', common', flags') end;
fun illegal_init _ = error "Illegal theory header";
fun new_exec keywords state node proper_init command_id' (assign_update, command_exec, init) =
if not proper_init andalso is_none init then NONE
else
let
val command_visible = visible_command node command_id';
val command_overlays = overlays node command_id';
val (command_name, blob_digests, blobs_index, span0) = the_command state command_id';
val blobs = map (resolve_blob state) blob_digests;
val span = Lazy.force span0;
val eval' =
Command.eval keywords (master_directory node) (fn () => the_default illegal_init init span)
(blobs, blobs_index) command_id' span (#1 (#2 command_exec));
val prints' =
perhaps (Command.print command_visible command_overlays keywords command_name eval') [];
val exec' = (eval', prints');
val assign_update' = assign_update_new (command_id', SOME exec') assign_update;
val init' = if command_name = Thy_Header.theoryN then NONE else init;
in SOME (assign_update', (command_id', exec'), init') end;
fun removed_execs node0 (command_id, exec_ids) =
subtract (op =) exec_ids (Command.exec_ids (lookup_entry node0 command_id));
fun print_consolidation options the_command_span node_name (assign_update, node) =
(case finished_result_theory node of
SOME (result_id, thy) =>
let
val active_tasks =
(node, false) |-> iterate_entries (fn (_, opt_exec) => fn active =>
if active then NONE
else
(case opt_exec of
NONE => NONE
| SOME (eval, _) =>
SOME (not (null (Execution.snapshot [Command.eval_exec_id eval])))));
in
if not active_tasks then
let
val consolidation =
if Options.bool options "editor_presentation" then
let
val (_, offsets, rev_segments) =
iterate_entries (fn (_, opt_exec) => fn (offset, offsets, segments) =>
(case opt_exec of
SOME (eval, _) =>
let
val command_id = Command.eval_command_id eval;
val span = the_command_span command_id;
val exec_id = Command.eval_exec_id eval;
val tr = Command.eval_result_command eval;
val st' = Command.eval_result_state eval;
val offset' = offset + the_default 0 (Command_Span.symbol_length span);
val offsets' = offsets
|> Inttab.update (command_id, offset)
|> Inttab.update (exec_id, offset);
val segments' = (span, tr, st') :: segments;
in SOME (offset', offsets', segments') end
| NONE => NONE)) node (0, Inttab.empty, []);
val adjust = Inttab.lookup offsets;
val segments =
rev rev_segments |> map (fn (span, tr, st') =>
{span = Command_Span.adjust_offsets adjust span, command = tr, state = st'});
val presentation_context: Thy_Info.presentation_context =
{options = options,
file_pos = Position.file node_name,
adjust_pos = Position.adjust_offsets adjust,
segments = segments};
in
fn _ =>
(Thy_Info.apply_presentation presentation_context thy;
commit_consolidated node)
end
else fn _ => commit_consolidated node;
val result_entry =
(case lookup_entry node result_id of
NONE => err_undef "result command entry" result_id
| SOME (eval, prints) =>
let
val print = eval |> Command.print0
{pri = Task_Queue.urgent_pri + 1, print_fn = K consolidation};
in (result_id, SOME (eval, print :: prints)) end);
val assign_update' = assign_update |> assign_update_change result_entry;
val node' = node |> assign_entry result_entry;
in (assign_update', node') end
else (assign_update, node)
end
| NONE => (assign_update, node));
in
fun update old_version_id new_version_id edits consolidate state =
Runtime.exn_trace_system (fn () =>
let
val options = Options.default ();
val the_command_span = Outer_Syntax.make_span o Lazy.force o #4 o the_command state;
val old_version = the_version state old_version_id;
val new_version =
timeit "Document.edit_nodes"
(fn () => old_version |> fold edit_nodes edits |> edit_keywords edits);
val nodes = nodes_of new_version;
val required = make_required nodes;
val required0 = make_required (nodes_of old_version);
val edited = fold (fn (name, _) => Symtab.update (name, ())) edits Symtab.empty;
val updated = timeit "Document.update" (fn () =>
nodes |> String_Graph.schedule
(fn deps => fn (name, node) =>
(singleton o Future.forks)
{name = "Document.update", group = NONE,
deps = map (Future.task_of o #2) deps, pri = 1, interrupts = false}
(fn () =>
timeit ("Document.update " ^ name) (fn () =>
Runtime.exn_trace_system (fn () =>
let
val root_theory = check_root_theory node;
val keywords = the_default (Session.get_keywords ()) (get_keywords node);
val maybe_consolidate = consolidate andalso could_consolidate node;
val imports = map (apsnd Future.join) deps;
val imports_result_changed = exists (#4 o #1 o #2) imports;
val node_required = Symtab.defined required name;
in
if Symtab.defined edited name orelse maybe_consolidate orelse
visible_node node orelse imports_result_changed orelse
Symtab.defined required0 name <> node_required
then
let
val node0 = node_of old_version name;
val init = init_theory imports node;
val proper_init =
is_some root_theory orelse
check_theory false name node andalso
forall (fn (name, (_, node)) => check_theory true name node) imports;
val (print_execs, common, (still_visible, initial)) =
if imports_result_changed then (assign_update_empty, NONE, (true, true))
else last_common keywords state node_required node0 node;
val common_command_exec =
(case common of
SOME id => (id, the_default Command.no_exec (the_entry node id))
| NONE => (Document_ID.none, Command.init_exec root_theory));
val (updated_execs, (command_id', exec'), _) =
(print_execs, common_command_exec, if initial then SOME init else NONE)
|> (still_visible orelse node_required) ?
iterate_entries_after common
(fn ((prev, id), _) => fn res =>
if not node_required andalso prev = visible_last node then NONE
else new_exec keywords state node proper_init id res) node;
val assign_update =
(node0, updated_execs) |-> iterate_entries_after common
(fn ((_, command_id0), exec0) => fn res =>
if is_none exec0 then NONE
else if assign_update_defined updated_execs command_id0 then SOME res
else SOME (assign_update_new (command_id0, NONE) res));
val last_exec =
if command_id' = Document_ID.none then NONE else SOME command_id';
val result =
if is_none last_exec orelse is_some (after_entry node last_exec) then NONE
else SOME (command_id', #1 exec');
val result_changed =
not (eq_option (Command.eval_eq o apply2 #2) (get_result node0, result));
val (assign_update', node') = node
|> assign_update_apply assign_update
|> set_result result
|> result_changed ? reset_consolidated
|> pair assign_update
|> (not result_changed andalso maybe_consolidate) ?
print_consolidation options the_command_span name;
val assign_result = assign_update_result assign_update';
val removed = maps (removed_execs node0) assign_result;
val _ = List.app Execution.cancel removed;
val assigned_node = SOME (name, node');
in ((removed, assign_result, assigned_node, result_changed), node') end
else (([], [], NONE, false), node)
end))))
|> Future.joins |> map #1);
val removed = maps #1 updated;
val assign_result = maps #2 updated;
val assigned_nodes = map_filter #3 updated;
val state' = state
|> define_version new_version_id new_version assigned_nodes;
in (removed, assign_result, state') end);
end;
(** global state **)
val global_state = Synchronized.var "Document.global_state" init_state;
fun state () = Synchronized.value global_state;
val change_state = Synchronized.change global_state;
end;