Mise à jour terminée. Pour connaître les apports de la version 13.8.4 par rapport à notre ancienne version vous pouvez lire les "Release Notes" suivantes :
https://about.gitlab.com/releases/2021/02/11/security-release-gitlab-13-8-4-released/
https://about.gitlab.com/releases/2021/02/05/gitlab-13-8-3-released/

why3ide.ml 67.5 KB
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(********************************************************************)
(*                                                                  *)
(*  The Why3 Verification Platform   /   The Why3 Development Team  *)
(*  Copyright 2010-2017   --   INRIA - CNRS - Paris-Sud University  *)
(*                                                                  *)
(*  This software is distributed under the terms of the GNU Lesser  *)
(*  General Public License version 2.1, with the special exception  *)
(*  on linking described in file LICENSE.                           *)
(*                                                                  *)
(********************************************************************)

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open Why3
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open Format
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open Gconfig
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open Stdlib
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open Ide_utils
open History
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open Itp_communication
open Itp_server
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external reset_gc : unit -> unit = "ml_reset_gc"

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let debug = Debug.lookup_flag "ide_info"
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let debug_stack_trace = Debug.lookup_flag "stack_trace"
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(***************************)
(* Debugging Json protocol *)
(***************************)


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(* TODO remove print_request_json and print_notification_json *)
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exception Badparsing

let print_request_json fmt (r: ide_request) =
  (try (
    let s = Pp.string_of Json_util.print_request r in
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    let x = Json_util.parse_request s in
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    if r = x then () else raise Badparsing)
  with
    _ -> Format.eprintf "Bad parsing@.");
  Json_util.print_request fmt r

let print_notification_json fmt (n: notification) =
  (try (
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    let x = Json_util.parse_notification (Pp.string_of Json_util.print_notification n) in
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    if n = x then () else raise Badparsing)
  with
    _ -> Format.eprintf "Bad parsing@.");
  Json_util.print_notification fmt n

let debug_json = Debug.register_flag "json_proto"
    ~desc:"Print@ json@ requests@ and@ notifications@"

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(*******************)
(* server protocol *)
(*******************)
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module Protocol_why3ide = struct
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  let debug_proto = Debug.register_flag "ide_proto"
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      ~desc:"Print@ debugging@ messages@ about@ Why3Ide@ protocol@"
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  let print_request_debug r =
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    Debug.dprintf debug_proto "request %a@." print_request r;
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    Debug.dprintf debug_json "%a@." print_request_json r
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  let print_msg_debug m =
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    Debug.dprintf debug_proto "message %a@." print_msg m
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  let print_notify_debug n =
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    Debug.dprintf debug_proto "handling notification %a@." print_notify n;
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    Debug.dprintf debug_json "%a@." print_notification_json n
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  let list_requests: ide_request list ref = ref []

  let get_requests () =
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    let n = List.length !list_requests in
    if n > 0 then
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      Debug.dprintf debug_proto "got %d new requests@." n;
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    let l = List.rev !list_requests in
    list_requests := [];
    l

  let send_request r =
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    print_request_debug r;
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    list_requests := r :: !list_requests

  let notification_list: notification list ref = ref []

  let notify n =
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(* too early, print when handling notifications
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    print_notify_debug n;
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 *)    notification_list := n :: !notification_list
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  let get_notified () =
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    let n = List.length !notification_list in
    if n > 0 then
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      Debug.dprintf debug_proto "got %d new notifications@." n;
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    let l = List.rev !notification_list in
    notification_list := [];
    l
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end

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(* True when session differs from the saved session *)
let session_needs_saving = ref false

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let get_notified = Protocol_why3ide.get_notified
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let send_request r =
  (* If request changes the session then session needs saving *)
  if modify_session r then
    session_needs_saving := true;
  Protocol_why3ide.send_request r
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(****************************************)
(* server instance on the GTK scheduler *)
(****************************************)
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(*
   The gtk scheduler is catching all exceptions avoiding the printing of the
   backtrace that is normally done by debug option stack_trace. To recover this
   behavior we catch exceptions ourselves. If "stack_trace" is on, we exit on
   first exception and print backtrace on standard output otherwise we raise
   the exception again (with information on error output).
*)
let backtrace_and_exit f () =
  try f () with
  | e ->
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     if Debug.test_flag debug_stack_trace then
       begin
         Printexc.print_backtrace stderr;
         Format.eprintf "exception '%a' was raised in a LablGtk callback.@."
                        Exn_printer.exn_printer e;
         exit 1
       end
     else
       begin
         Format.eprintf "exception '%a' was raised in a LablGtk callback.@."
                        Exn_printer.exn_printer e;
         Format.eprintf "This should not happen. Please report. @.";
         raise e
       end
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module Scheduler = struct
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    let blocking = false

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    let multiplier = 3
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    let idle ~prio f =
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      let (_ : GMain.Idle.id) = GMain.Idle.add ~prio (backtrace_and_exit f) in ()
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    let timeout ~ms f =
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      let (_ : GMain.Timeout.id) =
        GMain.Timeout.add ~ms ~callback:(backtrace_and_exit f) in ()
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end
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module Server = Itp_server.Make (Scheduler) (Protocol_why3ide)
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(************************)
(* parsing command line *)
(************************)
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let files : string Queue.t = Queue.create ()
let opt_parser = ref None

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let spec = [
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  "-F", Arg.String (fun s -> opt_parser := Some s),
      "<format> select input format (default: \"why\")";
  "--format", Arg.String (fun s -> opt_parser := Some s),
      " same as -F";
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(*
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  "-f",
   Arg.String (fun s -> input_files := s :: !input_files),
   "<file> add file to the project (ignored if it is already there)";
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*)
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  Termcode.arg_extra_expl_prefix
]
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let usage_str = sprintf
  "Usage: %s [options] [<file.why>|<project directory>]..."
  (Filename.basename Sys.argv.(0))
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let env, gconfig = try
  let config, base_config, env =
    Whyconf.Args.initialize spec (fun f -> Queue.add f files) usage_str in
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    if Queue.is_empty files then
      Whyconf.Args.exit_with_usage spec usage_str;
    Gconfig.load_config config base_config;
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    env, Gconfig.config ()
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  with e when not (Debug.test_flag Debug.stack_trace) ->
    eprintf "%a@." Exn_printer.exn_printer e;
    exit 1

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(* Initialization of config, provers, task_driver and controller in the server *)
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let () =
  let dir =
    try
      Server_utils.get_session_dir ~allow_mkdir:true files
    with Invalid_argument s ->
      Format.eprintf "Error: %s@." s;
      Whyconf.Args.exit_with_usage spec usage_str
  in
  Server.init_server gconfig.config env dir;
  Queue.iter (fun f -> send_request (Add_file_req f)) files
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let () =
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  Debug.dprintf debug "Init the GTK interface...@?";
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  ignore (GtkMain.Main.init ());
  Debug.dprintf debug " done.@.";
  Gconfig.init ()

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(********************************)
(* Source language highlighting *)
(********************************)

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let (why_lang, any_lang) =
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  let main = Whyconf.get_main gconfig.config in
  let load_path = Filename.concat (Whyconf.datadir main) "lang" in
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  let languages_manager =
    GSourceView2.source_language_manager ~default:true
  in
  languages_manager#set_search_path
    (load_path :: languages_manager#search_path);
  let why_lang =
    match languages_manager#language "why3" with
    | None ->
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        eprintf "language file for 'why3' not found in directory %s@."
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          load_path;
        exit 1
    | Some _ as l -> l in
  let any_lang filename =
    match languages_manager#guess_language ~filename () with
    | None -> why_lang
    | Some _ as l -> l in
  (why_lang, any_lang)

(* Borrowed from Frama-C src/gui/source_manager.ml:
Try to convert a source file either as UTF-8 or as locale. *)
let try_convert s =
  try
    if Glib.Utf8.validate s then s else Glib.Convert.locale_to_utf8 s
  with Glib.Convert.Error _ ->
    try
      Glib.Convert.convert_with_fallback
        ~fallback:"#neither UTF-8 nor locale nor ISO-8859-15#"
        ~to_codeset:"UTF-8"
        ~from_codeset:"ISO_8859-15"
        s
    with Glib.Convert.Error _ as e -> Printexc.to_string e

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(****************************)
(* Color handling in source *)
(****************************)

(* For each view, we have to recreate the tags *)
let create_colors v =
  let premise_tag (v: GSourceView2.source_view) = v#buffer#create_tag
      ~name:"premise_tag" [`BACKGROUND gconfig.premise_color] in

  let neg_premise_tag (v: GSourceView2.source_view) = v#buffer#create_tag
      ~name:"neg_premise_tag" [`BACKGROUND gconfig.neg_premise_color] in

  let goal_tag (v: GSourceView2.source_view) = v#buffer#create_tag
      ~name:"goal_tag" [`BACKGROUND gconfig.goal_color] in

  let error_tag (v: GSourceView2.source_view) = v#buffer#create_tag
      ~name:"error_tag" [`BACKGROUND gconfig.error_color] in
  let _ : GText.tag = premise_tag v in
  let _ : GText.tag = neg_premise_tag v in
  let _ : GText.tag = goal_tag v in
  let _ : GText.tag = error_tag v in
  ()

(* Erase all the source location tags in a source file *)
let erase_color_loc (v:GSourceView2.source_view) =
  let buf = v#buffer in
  buf#remove_tag_by_name "premise_tag" ~start:buf#start_iter ~stop:buf#end_iter;
  buf#remove_tag_by_name "neg_premise_tag" ~start:buf#start_iter ~stop:buf#end_iter;
  buf#remove_tag_by_name "goal_tag" ~start:buf#start_iter ~stop:buf#end_iter;
  buf#remove_tag_by_name "error_tag" ~start:buf#start_iter ~stop:buf#end_iter


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(*******************)
(* Graphical tools *)
(*******************)

(* Elements needed for usage of graphical elements *)

(* [quit_on_saved] set to true by exit function to delay quiting after Saved
   notification is received *)
let quit_on_saved = ref false

(* Exit brutally without asking anything *)
let exit_function_unsafe () =
  send_request Exit_req;
  GMain.quit ()

(* Contains a quadruplets (tab page, source_view, file_has_been_modified, label_of_tab):
   - tab_page is a unique number for each pages of the notebook
   - source_view is the graphical element inside a tab
   - has_been_modified is a reference to a boolean stating if the current tab
     source has been modified
   - label_of_tab is the mutable title of the tab
*)
let source_view_table : (int * GSourceView2.source_view * bool ref * GMisc.label) Hstr.t =
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(* The corresponding file does not have a source view *)
exception Nosourceview of string

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let get_source_view_table (file:string) =
  match Hstr.find source_view_table file with
  | v -> v
  | exception Not_found -> raise (Nosourceview file)

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(* This returns the source_view of a file *)
let get_source_view (file: string) : GSourceView2.source_view =
  match Hstr.find source_view_table file with
  | (_, v, _, _) -> v
  | exception Not_found -> raise (Nosourceview file)

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(* Saving function for sources *)
let save_sources () =
  Hstr.iter
    (fun k (_n, (s: GSourceView2.source_view), b, _l) ->
      if !b then
        let text_to_save = s#source_buffer#get_text () in
        send_request (Save_file_req (k, text_to_save))
    )
    source_view_table

(* True if there exist a file which needs saving *)
let files_need_saving () =
  Hstr.fold (fun _k (_, _, b, _) acc -> !b || acc) source_view_table false

(* Ask if the user wants to save session before exit. Exit is then delayed until
   the [Saved] notification is received *)
let exit_function_safe () =
  if not !session_needs_saving && not (files_need_saving ()) then
    exit_function_unsafe ()
  else
    let answer =
      GToolbox.question_box
        ~title:"Why3 saving session and files"
        ~buttons:["Yes"; "No"; "Cancel"]
        "Do you want to save the session and unsaved files?"
    in
    begin
      match answer with
      | 1 -> save_sources(); send_request Save_req; quit_on_saved := true
      | 2 -> exit_function_unsafe ()
      | _ -> ()
    end

(* Update name of the tab when the label changes so that it has a * as prefix *)
let update_label_change (label: GMisc.label) =
  let s = label#text in
  if not (Strings.has_prefix "*" s) then
    label#set_text ("*" ^ s)

(* Update name of the tab when the label is saved. Removes * prefix *)
let update_label_saved (label: GMisc.label) =
  let s = label#text in
  if (Strings.has_prefix "*" s) then
    label#set_text (String.sub s 1 (String.length s - 1))

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(**********************)
(* Graphical elements *)
(**********************)
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let main_window : GWindow.window =
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  let w = GWindow.window
            ~allow_grow:true ~allow_shrink:true
            ~width:gconfig.window_width
            ~height:gconfig.window_height
            ~title:"Why3 Interactive Proof Session" ()
  in
  (* callback to record the new size of the main window when changed, so
   that on restart the window size is the same as the last session *)
  let (_ : GtkSignal.id) =
    w#misc#connect#size_allocate
      ~callback:
      (fun {Gtk.width=w;Gtk.height=h} ->
       gconfig.window_height <- h;
       gconfig.window_width <- w)
  in w

(* the main window contains a vertical box, containing:
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   1. the menu [menubar]
   2. an horizontal box [hb]
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 *)

let vbox = GPack.vbox ~packing:main_window#add ()

let menubar = GMenu.menu_bar
  ~packing:(vbox#pack ?from:None ?expand:None ?fill:None ?padding:None)
  ()

let hb = GPack.hbox ~packing:vbox#add ()

(* 1. Menu *)

let factory = new GMenu.factory menubar

let accel_group = factory#accel_group

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let create_menu_item (factory:GMenu.menu GMenu.factory)
                     ?key label tooltip =
  let i = factory#add_item ?key label in
  i#misc#set_tooltip_markup tooltip;
  i

let connect_menu_item i ~callback =
  let (_ : GtkSignal.id) = i#connect#activate ~callback in ()

(* 1.1 "File" menu items *)
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let file_menu = factory#add_submenu "_File"
let file_factory = new GMenu.factory file_menu ~accel_group
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let menu_add_file =
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  create_menu_item file_factory "Add file to session"
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                   "Insert another file in the current session"
let menu_preferences =
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  create_menu_item file_factory "Preferences"
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                   "Open Preferences Window"
let menu_save_session =
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  create_menu_item file_factory "Save session"
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                   "Save the current proof session on disk"
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let menu_save_files =
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  create_menu_item file_factory "Save files"
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                   "Save the edited source files on disk"
let menu_save_session_and_files =
  create_menu_item file_factory ~key:GdkKeysyms._S "_Save session and files"
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                   "Save the current proof session and the source files"
let menu_refresh =
  create_menu_item file_factory ~key:GdkKeysyms._R "Save all and _Refresh session"
                   "Save the current proof session and the source files, then refresh the proof session with updated source files."
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let menu_quit =
  create_menu_item file_factory ~key:GdkKeysyms._Q "_Quit"
                   "Quit the interface. See the Preferences for setting the policy on automatic file saving at exit."

(* 1.2 "Tools" menu items *)

let tools_menu = factory#add_submenu "_Tools"
let tools_factory = new GMenu.factory tools_menu ~accel_group
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let tools_accel_group = GtkData.AccelGroup.create ()
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let strategies_factory =
  let tools_submenu_strategies = tools_factory#add_submenu "Strategies" in
  let ( _ : GMenu.menu_item) = tools_factory#add_separator () in
  new GMenu.factory tools_submenu_strategies

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let provers_factory =
  let tools_submenu_provers = tools_factory#add_submenu "Provers" in
  let ( _ : GMenu.menu_item) = tools_factory#add_separator () in
  new GMenu.factory tools_submenu_provers
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(* 1.3 "View" menu items *)



(****************************)
(* actions of the interface *)
(****************************)









(***********************************)
(* connection of actions to signals *)
(***********************************)

(* File menu signals *)

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let send_session_config_to_server () =
  let nb = gconfig.session_nb_processes in
  send_request (Set_config_param("max_tasks",nb));
  let nb = gconfig.session_time_limit in
  send_request (Set_config_param("timelimit",nb));
  let nb = gconfig.session_mem_limit in
  send_request (Set_config_param("memlimit",nb))

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let () =
  let callback () =
    Gconfig.preferences gconfig;
    (* TODO:
      begin
        match !current_env_session with
          | None -> ()
          | Some e ->
              Session.update_env_session_config e gconfig.config;
              Session.unload_provers e
      end;
      recreate_gui ();
(*
      Mprover.iter
        (fun p pi ->
          Debug.dprintf debug "editor for %a : %s@." Whyconf.print_prover p
            pi.editor)
        (Whyconf.get_provers gconfig.config);
     *)
     *)
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    send_session_config_to_server ()
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  in
  connect_menu_item menu_preferences ~callback

let () =
  connect_menu_item
    menu_save_session
    ~callback:(fun () -> send_request Save_req)
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let () =
  connect_menu_item
    menu_save_session_and_files
    ~callback:(fun () -> save_sources(); send_request Save_req)

let () =
  connect_menu_item
    menu_save_files
    ~callback:(fun () -> save_sources())


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let () =
  connect_menu_item
    menu_quit
    ~callback:exit_function_safe
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let (_ : GtkSignal.id) =
  main_window#connect#destroy
    ~callback:exit_function_safe

let (_ : GtkSignal.id) =
  main_window#event#connect#delete
    ~callback:(fun _ -> exit_function_safe (); true)
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(* 2. horizontal box contains:
   2.1 TODO: a tool box ?
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   2.2 a horizontal paned [hp] containing:
     2.2.1 a scrolled window to hold the tree view of the session [scrolledview]
     2.2.2 a vertical paned containing [vpan222]
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*)

let hp = GPack.paned `HORIZONTAL ~packing:hb#add ()

let scrollview =
  let sv =
    GBin.scrolled_window
      ~hpolicy:`AUTOMATIC ~vpolicy:`AUTOMATIC
      ~width:gconfig.tree_width ~shadow_type:`ETCHED_OUT
      ~packing:hp#add ()
  in
  let (_ : GtkSignal.id) =
    sv#misc#connect#size_allocate
      ~callback:
      (fun {Gtk.width=w;Gtk.height=_h} ->
       gconfig.tree_width <- w)
  in sv

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(** {2 view for the session tree} *)
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let scrolled_session_view =
  GBin.scrolled_window
    ~hpolicy: `AUTOMATIC ~vpolicy: `AUTOMATIC
    ~shadow_type:`ETCHED_OUT
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    ~packing:scrollview#add_with_viewport
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    ()

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(* Vertical pan *)
let vpan222 = GPack.paned `VERTICAL ~packing:hp#add ()

(*  the scrolled window 2.2.1 [scrolled_session_view] contains a GTK tree

*)

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(** {3 the model for tree view} *)

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let cols = new GTree.column_list
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(* first column: unique id of the object *)
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let node_id_column = cols#add Gobject.Data.int
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(* second column: an icon identifying the object: file,theory, goal, transformation *)
let icon_column = cols#add Gobject.Data.gobject
(* third column: name of the object *)
let name_column = cols#add Gobject.Data.string
(* fourth column: icon status for the object: proved/unproved, unknown, timeout, etc. *)
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let status_column = cols#add Gobject.Data.gobject
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(* fifth column: extra status info: time, obsolete status, limits *)
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let time_column = cols#add Gobject.Data.string
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(* first view column: icon and name *)
let view_name_column =
  let v = GTree.view_column ~title:"Theories/Goals" () in
  (* icon attribute *)
  let icon_renderer = GTree.cell_renderer_pixbuf [ ] in
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  v#pack icon_renderer ~expand:false;
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  v#add_attribute icon_renderer "pixbuf" icon_column;
  let name_renderer = GTree.cell_renderer_text [`XALIGN 0.] in
  v#pack name_renderer;
  v#add_attribute name_renderer "text" name_column;
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  (* v#set_sizing `AUTOSIZE; *)
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  v#set_resizable true;
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  (*  v#set_max_width 1000;*)
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  v

(* second view column: status *)
let view_status_column =
  let status_renderer = GTree.cell_renderer_pixbuf [ ] in
  let v = GTree.view_column ~title:"Status"
                            ~renderer:(status_renderer, ["pixbuf", status_column])
                            ()
  in
  v#set_resizable false;
  v#set_visible true;
  v
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let view_time_column =
  let renderer = GTree.cell_renderer_text [`XALIGN 0.] in
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  let v = GTree.view_column ~title:"Time"
                            ~renderer:(renderer, ["text", time_column]) ()
  in
  v#set_resizable false;
  v#set_visible true;
  v
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let goals_model,goals_view =
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  Debug.dprintf debug "Creating tree model...@?";
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  let model = GTree.tree_store cols in
  let view = GTree.view ~model ~packing:scrolled_session_view#add () in
  let () = view#selection#set_mode (* `SINGLE *) `MULTIPLE in
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(*
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  let () = view#set_rules_hint true in
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*)
  let () = view#set_enable_search false in
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  let _: int = view#append_column view_status_column in
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  let _: int = view#append_column view_name_column in
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  let _: int = view#append_column view_time_column in
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  view#set_expander_column (Some view_name_column);
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  Debug.dprintf debug "done@.";
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  model,view
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(***********************************)
(* Mapping session to the GTK tree *)
(***********************************)

type pa_status = Controller_itp.proof_attempt_status
      * bool   (* obsolete or not *) (* TODO *)
      * Call_provers.resource_limit

let node_id_type : node_type Hint.t = Hint.create 17
let node_id_proved : bool Hint.t = Hint.create 17
let node_id_pa : pa_status Hint.t = Hint.create 17
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let node_id_detached : bool Hint.t = Hint.create 17
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let get_node_type id = Hint.find node_id_type id
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let get_node_proved id =
  try Hint.find node_id_proved id
  with Not_found -> false

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let get_node_id_pa id = Hint.find node_id_pa id

let get_obs (pa_st: pa_status) = match pa_st with
| _, b, _ -> b

let get_proof_attempt (pa_st: pa_status) = match pa_st with
| pa, _, _ -> pa

let get_limit (pa_st: pa_status) = match pa_st with
| _, _, l -> l

let get_node_obs id = get_obs (get_node_id_pa id)
let get_node_proof_attempt id = get_proof_attempt (get_node_id_pa id)
let get_node_limit id = get_limit (get_node_id_pa id)

let get_node_id iter = goals_model#get ~row:iter ~column:node_id_column

(* To each node we have the corresponding row_reference *)
let node_id_to_gtree : GTree.row_reference Hint.t = Hint.create 42
(* TODO exception for those: *)
let get_node_row id = Hint.find node_id_to_gtree id

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let get_node_detached id =
  Hint.find node_id_detached id

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(******************************)
(* Initialization of the tree *)
(******************************)

let remove_tree goals_model =
  Hint.iter (fun _x i ->
    try ignore(goals_model#remove (i#iter)) with _ -> ())
    node_id_to_gtree

let clear_tree_and_table goals_model =
  remove_tree goals_model;
  Hint.clear node_id_to_gtree;
  Hint.clear node_id_type;
  Hint.clear node_id_proved;
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  Hint.clear node_id_pa;
  Hint.clear node_id_detached
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(**************)
(* Menu items *)
(**************)
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let reload_unsafe () = send_request Reload_req
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let save_and_reload () = save_sources (); reload_unsafe ()

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(* Same as reload_safe but propose to save edited sources before reload *)
let reload_safe () =
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  if files_need_saving () then
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    let answer =
      GToolbox.question_box
        ~title:"Why3 saving source files"
        ~buttons:["Yes"; "No"; "Cancel"]
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        "Do you want to save modified source files before refresh?\nBeware that unsaved modifications will be discarded."
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    in
    match answer with
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    | 1 -> save_and_reload ()
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    | 2 -> reload_unsafe ()
    | _ -> ()
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  else
    reload_unsafe ()
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let () = connect_menu_item menu_refresh ~callback:save_and_reload
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(* vpan222 contains:
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   2.2.2.1 a notebook containing view of the current task, source code etc
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   2.2.2.2 a vertical pan which contains [vbox2222]
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     2.2.2.2.1 the input field to type commands
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     2.2.2.2.2 a scrolled window to hold the output of the commands
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 *)

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(***********************************)
(*    notebook on the top 2.2.2.1  *)
(***********************************)
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(* notebook is composed of a Task page and several source files pages *)
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let notebook = GPack.notebook ~packing:vpan222#add ()

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(********************************)
(* Task view (part of notebook) *)
(********************************)
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let task_page,scrolled_task_view =
  let label = GMisc.label ~text:"Task" () in
  0, GPack.vbox ~homogeneous:false ~packing:
    (fun w -> ignore(notebook#append_page ~tab_label:label#coerce w)) ()

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let scrolled_task_view =
  GBin.scrolled_window
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    ~height:gconfig.task_height
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    ~hpolicy: `AUTOMATIC ~vpolicy: `AUTOMATIC
    ~shadow_type:`ETCHED_OUT
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    ~packing:scrolled_task_view#add ()
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let (_ : GtkSignal.id) =
  scrolled_task_view#misc#connect#size_allocate
    ~callback:
    (fun {Gtk.width=_w;Gtk.height=h} ->
       gconfig.task_height <- h)


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let task_view =
  GSourceView2.source_view
    ~editable:false
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    ~cursor_visible:false
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    ~show_line_numbers:true
    ~packing:scrolled_task_view#add
    ()

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(* Creating a page for source code view *)
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let create_source_view =
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  (* Counter for pages *)
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  let n = ref 1 in
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  (* Create a page with tabname [f] and buffer equal to [content] in the
     notebook. Also add a corresponding page in source_view_table. *)
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  let create_source_view f content =
    if not (Hstr.mem source_view_table f) then
      begin
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        let label = GMisc.label ~text:f () in
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        let source_page, scrolled_source_view =
          !n, GPack.vbox ~homogeneous:false ~packing:
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            (fun w -> ignore(notebook#append_page ~tab_label:label#coerce w)) ()
        in
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        let scrolled_source_view =
          GBin.scrolled_window
            ~hpolicy: `AUTOMATIC ~vpolicy: `AUTOMATIC
            ~shadow_type:`ETCHED_OUT
            ~packing:scrolled_source_view#add () in
        let source_view =
          GSourceView2.source_view
            ~auto_indent:true
            ~insert_spaces_instead_of_tabs:true ~tab_width:2
            ~show_line_numbers:true
            ~right_margin_position:80 ~show_right_margin:true
            (* ~smart_home_end:true *)
            ~editable:true
            ~packing:scrolled_source_view#add
            () in
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        let has_changed = ref false in
        Hstr.add source_view_table f (source_page, source_view, has_changed, label);
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        n := !n + 1;
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        source_view#source_buffer#begin_not_undoable_action ();
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        source_view#source_buffer#set_text content;
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        source_view#source_buffer#end_not_undoable_action ();
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        (* At initialization, file has not changed. When it changes, changes the
           name of the tab and update has_changed boolean. *)
        let (_: GtkSignal.id) = source_view#source_buffer#connect#changed
          ~callback:(fun () ->
            try
              let _source_page, _source_view, has_changed, label =
                Hstr.find source_view_table f in
              update_label_change label;
              has_changed := true;
              ()
            with Not_found -> () ) in
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        Gconfig.add_modifiable_mono_font_view source_view#misc;
        source_view#source_buffer#set_language why_lang;
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        (* We have to create the tags for background colors for each view.
           They are not reusable from the other views.  *)
        create_colors source_view;
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        Gconfig.set_fonts ()
      end in
  create_source_view
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(* End of notebook *)

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(*
  2.2.2.2 a vertical pan which contains [vbox2222]
    2.2.2.2.1 the input field to type commands [hbox22221]
    2.2.2.2.2 a scrolled window to hold the output of the commands [message_zone]
*)
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let vbox2222 = GPack.vbox ~packing:vpan222#add  ()
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(* 2.2.2.2.1 Horizontal box [hbox22221]
     [monitor] number of scheduled/running provers
     [command_entry] Commands to run on the session
*)
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let hbox22221 =
  GPack.hbox
    ~packing:(vbox2222#pack ?from:None ?expand:None ?fill:None ?padding:None) ()

let monitor =
  GMisc.label
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    ~text:"  0/0/0"
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    ~width:100
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    ~xalign:0.0
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    ~packing:(hbox22221#pack ?from:None ?expand:None ?fill:None ?padding:None) ()
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let command_entry =
  GEdit.entry
    ~text:"type commands here"
    ~packing:hbox22221#add ()
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(* Part 2.2.2.2.2 contains messages returned by the IDE/server *)
let messages_notebook = GPack.notebook ~packing:vbox2222#add ()

let error_page,error_view =
  let label = GMisc.label ~text:"Messages" () in
  0, GPack.vbox ~homogeneous:false ~packing:
    (fun w -> ignore(messages_notebook#append_page ~tab_label:label#coerce w)) ()

let log_page,log_view =
  let label = GMisc.label ~text:"Log" () in
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  1, GPack.vbox ~homogeneous:false ~packing:
    (fun w -> ignore(messages_notebook#append_page ~tab_label:label#coerce w)) ()

(* tab 3: edited proof *)
let edited_page,edited_tab =
  let label = GMisc.label ~text:"Edited proof" () in
  2, GPack.vbox ~homogeneous:false ~packing:
    (fun w -> ignore(messages_notebook#append_page ~tab_label:label#coerce w)) ()

let scrolled_edited_view =
  GBin.scrolled_window
    ~hpolicy: `AUTOMATIC ~vpolicy: `AUTOMATIC
    ~shadow_type:`ETCHED_OUT ~packing:edited_tab#add ()

let edited_view =
  GSourceView2.source_view
    ~editable:false
    ~show_line_numbers:true
    ~packing:scrolled_edited_view#add
    ()

(* tab 4: prover output *)
let output_page,output_tab =
  let label = GMisc.label ~text:"Prover output" () in
  3, GPack.vbox ~homogeneous:false ~packing:
    (fun w -> ignore(messages_notebook#append_page ~tab_label:label#coerce w)) ()

let scrolled_output_view =
  GBin.scrolled_window
    ~hpolicy: `AUTOMATIC ~vpolicy: `AUTOMATIC
    ~shadow_type:`ETCHED_OUT ~packing:output_tab#add ()

let output_view =
  GSourceView2.source_view
    ~editable:false
    ~show_line_numbers:true
    ~packing:scrolled_output_view#add
    ()


(* tab 5: counterexample *)
let counterexample_page,counterexample_tab =
  let label = GMisc.label ~text:"Counterexample" () in
  4, GPack.vbox ~homogeneous:false ~packing:
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    (fun w -> ignore(messages_notebook#append_page ~tab_label:label#coerce w)) ()

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let scrolled_counterexample_view =
  GBin.scrolled_window
    ~hpolicy: `AUTOMATIC ~vpolicy: `AUTOMATIC
    ~shadow_type:`ETCHED_OUT ~packing:counterexample_tab#add ()

let counterexample_view =
  GSourceView2.source_view
    ~editable:false
    ~show_line_numbers:true
    ~packing:scrolled_counterexample_view#add
    ()





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let message_zone =
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  let sv = GBin.scrolled_window
      ~hpolicy:`AUTOMATIC ~vpolicy:`AUTOMATIC
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      ~shadow_type:`ETCHED_OUT ~packing:error_view#add ()
  in
  GText.view ~editable:false ~cursor_visible:false
    ~packing:sv#add ()

let log_zone =
  let sv = GBin.scrolled_window
      ~hpolicy:`AUTOMATIC ~vpolicy:`AUTOMATIC
      ~shadow_type:`ETCHED_OUT ~packing:log_view#add ()
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  in
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  GText.view ~editable:false ~cursor_visible:false
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    ~packing:sv#add ()

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(* Create a tag for errors in the message zone. *)
let message_zone_error_tag = message_zone#buffer#create_tag
  ~name:"error" [`BACKGROUND gconfig.neg_premise_color]

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(**** Message-zone printing functions *****)

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let add_to_log mark s =
  log_zone#buffer#insert ("\n--------["^ mark ^"]--------\n");
  log_zone#buffer#insert s;
  log_zone#scroll_to_mark `INSERT

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(* Function used to print stuff on the message_zone *)
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let print_message ~kind ~mark fmt =
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  Format.kfprintf
    (fun _ -> let s = flush_str_formatter () in
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              add_to_log mark s;
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              if kind>0 then
                begin
                  message_zone#buffer#set_text s;
                  messages_notebook#goto_page error_page
                end)
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    str_formatter
    fmt

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(**** Monitor *****)
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let fan n =
  match n mod 4 with
    | 0 -> "|"
    | 1 | -3 -> "\\"
    | 2 | -2 -> "-"
    | 3 | -1 -> "/"
    | _ -> assert false

let update_monitor =
  let c = ref 0 in
  fun t s r ->
  reset_gc ();
  incr c;
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  let f = if r=0 then "  " else fan (!c / 2) ^ " " in
  monitor#set_text
    (f ^ (string_of_int t) ^ "/" ^ (string_of_int s) ^ "/" ^ (string_of_int r))
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(****************************)
(* command entry completion *)
(****************************)

let completion_cols = new GTree.column_list
let completion_col = completion_cols#add Gobject.Data.string
let completion_model = GTree.tree_store completion_cols

let command_entry_completion : GEdit.entry_completion =
  GEdit.entry_completion ~model:completion_model ~minimum_key_length:1 ~entry:command_entry ()

let add_completion_entry s =
  let row = completion_model#append () in
  completion_model#set ~row ~column:completion_col s

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let match_function s iter =
  let candidate = completion_model#get ~row:iter ~column:completion_col in
  try
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    ignore (Str.search_forward (Str.regexp_string_case_fold s) candidate 0);
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    true
  with Not_found -> false

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(* see also init_compeltion below *)
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(*********************)
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(* Terminal history  *)
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(*********************)

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let list_commands = create_history()
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let _ =
  command_entry#event#connect#key_press
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    ~callback:(fun (ev: 'a Gdk.event) ->
      match GdkEvent.Key.keyval ev with
      | k when k = GdkKeysyms._Up -> (* Arrow up *)
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          let s = print_next_command list_commands in
          (match s with
          | None -> true
          | Some s ->
              (command_entry#set_text s; true))
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      | k when k = GdkKeysyms._Down -> (* Arrow down *)
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          let s = print_prev_command list_commands in
          (match s with
          | None -> true
          | Some s ->
              (command_entry#set_text s; true))
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      | k when k = GdkKeysyms._Escape ->
        goals_view#misc#grab_focus ();
        true
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      | _ -> false
      )

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let () = send_session_config_to_server ()
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(********************)
(* Locations colors *)
(********************)

(* This apply a background [color] on a location given by its file view [v] line
   [l] beginning char [b] and end char [e]. *)
let color_loc (v:GSourceView2.source_view) ~color l b e =
  let buf = v#buffer in
  let top = buf#start_iter in
  let start = top#forward_lines (l-1) in
  let start = start#forward_chars b in
  let stop = start#forward_chars (e-b) in
  buf#apply_tag_by_name ~start ~stop color

let convert_color (color: color): string =
  match color with
  | Neg_premise_color -> "neg_premise_tag"
  | Premise_color -> "premise_tag"
  | Goal_color -> "goal_tag"

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let move_to_line ~yalign (v : GSourceView2.source_view) line =
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  let line = max 0 (line - 1) in
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  let line = min line v#buffer#line_count in
  let it = v#buffer#get_iter (`LINE line) in
  v#buffer#place_cursor ~where:it;
  let mark = `MARK (v#buffer#create_mark it) in
  v#scroll_to_mark ~use_align:true ~yalign mark

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(* Add a color tag on the right locations on the correct file.
   If the file was not open yet, nothing is done *)
let color_loc ~color loc =
  let f, l, b, e = Loc.get loc in
  try
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    let (_, v, _, _) = get_source_view_table f in
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    let color = convert_color color in
    color_loc ~color v l b e
  with
  | Nosourceview _ ->
      (* If the file is not present do nothing *)
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      print_message ~kind:0 ~mark:"color_loc" "%s" "No source view yet"
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(* Scroll to a specific locations *)
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let scroll_to_loc ~force_tab_switch loc_of_goal =
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  match loc_of_goal with
  | None -> ()
  | Some (loc, _) ->
    let f, l, _, _ = Loc.get loc in
    try
      let (n, v, _, _) = get_source_view_table f in
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      if force_tab_switch then
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        begin
          Debug.dprintf debug "tab switch to page %d@." n;
          notebook#goto_page n;
        end;
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      move_to_line ~yalign:0.0 v l
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    with Nosourceview _ ->
      Debug.dprintf debug "scroll_to_loc: no source know for file %s@." f
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(* Erase the colors and apply the colors given by l (which come from the task)
   to appropriate source files *)
let apply_loc_on_source (l: (Loc.position * color) list) =
  Hstr.iter (fun _ (_, v, _, _) -> erase_color_loc v) source_view_table;
  List.iter (fun (loc, color) ->
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    color_loc ~color loc) l;
  let loc_of_goal =
    (* TODO the last location sent seems more relevant thus the rev. This
       should be changed, the sent task should contain the information of where
       to scroll and the list of locations is far too long. *)
    try Some (List.find (fun (_, color) -> color = Goal_color) (List.rev l))
    with Not_found -> None
  in
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  scroll_to_loc ~force_tab_switch:false loc_of_goal