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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2015 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Util
class type proof_view =
object
inherit GObj.widget
method buffer : GText.buffer
method refresh : unit -> unit
method clear : unit -> unit
method set_goals : Interface.goals option -> unit
method set_evars : Interface.evar list option -> unit
method width : int
end
(* tag is the tag to be hooked, item is the item covered by this tag, make_menu
* * is the template for building menu if needed, sel_cb is the callback if
* there
* * is a selection o said menu, hover_cb is the callback when there is only
* * hovering *)
let hook_tag_cb tag menu_content sel_cb hover_cb =
ignore (tag#connect#event ~callback:
(fun ~origin evt it ->
let iter = new GText.iter it in
let start = iter#backward_to_tag_toggle (Some tag) in
let stop = iter#forward_to_tag_toggle (Some tag) in
match GdkEvent.get_type evt with
| `BUTTON_PRESS ->
let ev = GdkEvent.Button.cast evt in
if (GdkEvent.Button.button ev) <> 3 then false else begin
let ctxt_menu = GMenu.menu () in
let factory = new GMenu.factory ctxt_menu in
List.iter
(fun (text,cmd) -> ignore (factory#add_item text ~callback:(sel_cb cmd)))
menu_content;
ctxt_menu#popup ~button:3 ~time:(GdkEvent.Button.time ev);
true
end
| `MOTION_NOTIFY ->
hover_cb start stop; false
| _ -> false))
let mode_tactic sel_cb (proof : #GText.view_skel) goals hints = match goals with
| [] -> assert false
| { Interface.goal_hyp = hyps; Interface.goal_ccl = cur_goal; } :: rem_goals ->
let on_hover sel_start sel_stop =
proof#buffer#remove_tag
~start:proof#buffer#start_iter
~stop:sel_start
Tags.Proof.highlight;
proof#buffer#remove_tag
~start:sel_stop
~stop:proof#buffer#end_iter
Tags.Proof.highlight;
proof#buffer#apply_tag ~start:sel_start ~stop:sel_stop Tags.Proof.highlight
in
let goals_cnt = List.length rem_goals + 1 in
let head_str = Printf.sprintf
"%d subgoal%s\n" goals_cnt (if 1 < goals_cnt then "s" else "")
in
let goal_str index total = Printf.sprintf
"______________________________________(%d/%d)\n" index total
in
(* Insert current goal and its hypotheses *)
let hyps_hints, goal_hints = match hints with
| None -> [], []
| Some (hl, h) -> (hl, h)
in
let rec insert_hyp hints hs = match hs with
| [] -> ()
| hyp :: hs ->
let tags, rem_hints = match hints with
| [] -> [], []
| hint :: hints ->
let tag = proof#buffer#create_tag [] in
let () = hook_tag_cb tag hint sel_cb on_hover in
[tag], hints
in
let () = proof#buffer#insert ~tags (hyp ^ "\n") in
insert_hyp rem_hints hs
in
let () = proof#buffer#insert head_str in
let () = insert_hyp hyps_hints hyps in
let () =
let tags = Tags.Proof.goal :: if goal_hints <> [] then
let tag = proof#buffer#create_tag [] in
let () = hook_tag_cb tag goal_hints sel_cb on_hover in
[tag]
else []
in
proof#buffer#insert (goal_str 1 goals_cnt);
proof#buffer#insert ~tags cur_goal;
proof#buffer#insert "\n"
in
(* Insert remaining goals (no hypotheses) *)
let fold_goal i _ { Interface.goal_ccl = g } =
proof#buffer#insert (goal_str i goals_cnt);
proof#buffer#insert (g ^ "\n")
in
let () = Util.List.fold_left_i fold_goal 2 () rem_goals in
ignore(proof#buffer#place_cursor
~where:(proof#buffer#end_iter#backward_to_tag_toggle
(Some Tags.Proof.goal)));
ignore(proof#scroll_to_mark ~use_align:true ~yalign:0.95 `INSERT)
let mode_cesar (proof : #GText.view_skel) = function
| [] -> assert false
| { Interface.goal_hyp = hyps; Interface.goal_ccl = cur_goal; } :: _ ->
proof#buffer#insert " *** Declarative Mode ***\n";
List.iter
(fun hyp -> proof#buffer#insert (hyp^"\n"))
hyps;
proof#buffer#insert "______________________________________\n";
proof#buffer#insert ("thesis := \n "^cur_goal^"\n");
ignore (proof#scroll_to_iter (proof#buffer#get_iter_at_mark `INSERT))
let rec flatten = function
| [] -> []
| (lg, rg) :: l ->
let inner = flatten l in
List.rev_append lg inner @ rg
let display mode (view : #GText.view_skel) goals hints evars =
let () = view#buffer#set_text "" in
match goals with
| None -> ()
(* No proof in progress *)
| Some { Interface.fg_goals = []; bg_goals = bg; shelved_goals; given_up_goals; } ->
let bg = flatten (List.rev bg) in
let evars = match evars with None -> [] | Some evs -> evs in
begin match (bg, shelved_goals,given_up_goals, evars) with
| [], [], [], [] ->
view#buffer#insert "No more subgoals."
| [], [], [], _ :: _ ->
(* A proof has been finished, but not concluded *)
view#buffer#insert "No more subgoals, but there are non-instantiated existential variables:\n\n";
let iter evar =
let msg = Printf.sprintf "%s\n" evar.Interface.evar_info in
view#buffer#insert msg
in
List.iter iter evars;
view#buffer#insert "\nYou can use Grab Existential Variables."
| [], [], _, _ ->
(* The proof is finished, with the exception of given up goals. *)
view#buffer#insert "No more subgoals, but there are some goals you gave up:\n\n";
let iter goal =
let msg = Printf.sprintf "%s\n" goal.Interface.goal_ccl in
view#buffer#insert msg
in
List.iter iter given_up_goals;
view#buffer#insert "\nYou need to go back and solve them."
| [], _, _, _ ->
(* All the goals have been resolved but those on the shelf. *)
view#buffer#insert "All the remaining goals are on the shelf:\n\n";
let iter goal =
let msg = Printf.sprintf "%s\n" goal.Interface.goal_ccl in
view#buffer#insert msg
in
List.iter iter shelved_goals
| _, _, _, _ ->
(* No foreground proofs, but still unfocused ones *)
let total = List.length bg in
let goal_str index = Printf.sprintf
"______________________________________(%d/%d)\n" index total
in
view#buffer#insert "This subproof is complete, but there are some unfocused goals:\n\n";
let iter i goal =
let () = view#buffer#insert (goal_str (succ i)) in
let msg = Printf.sprintf "%s\n" goal.Interface.goal_ccl in
view#buffer#insert msg
in
List.iteri iter bg
end
| Some { Interface.fg_goals = fg } ->
mode view fg hints
let proof_view () =
let buffer = GSourceView2.source_buffer
~highlight_matching_brackets:true
~tag_table:Tags.Proof.table ()
in
let text_buffer = new GText.buffer buffer#as_buffer in
let view = GSourceView2.source_view
~source_buffer:buffer ~editable:false ~wrap_mode:`WORD ()
in
let () = Gtk_parsing.fix_double_click view in
let default_clipboard = GData.clipboard Gdk.Atom.primary in
let _ = buffer#add_selection_clipboard default_clipboard in
object
inherit GObj.widget view#as_widget
val mutable goals = None
val mutable evars = None
method buffer = text_buffer
method clear () = buffer#set_text ""
method set_goals gls = goals <- gls
method set_evars evs = evars <- evs
method refresh () =
let dummy _ () = () in
display (mode_tactic dummy) (view :> GText.view_skel) goals None evars
method width = Ideutils.textview_width (view :> GText.view_skel)
end
(* ignore (proof_buffer#add_selection_clipboard cb); *)
|
