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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 *)
(************************************************************************)
(* Parameters of pretty-printing *)
type pp_global_params = {
margin : int;
max_indent : int;
max_depth : int;
ellipsis : string }
(* Default parameters of pretty-printing *)
let dflt_gp = {
margin = 78;
max_indent = 50;
max_depth = 50;
ellipsis = "..." }
(* A deeper pretty-printer to print proof scripts *)
let deep_gp = {
margin = 78;
max_indent = 50;
max_depth = 10000;
ellipsis = "..." }
(* set_gp : Format.formatter -> pp_global_params -> unit
* set the parameters of a formatter *)
let set_gp ft gp =
Format.pp_set_margin ft gp.margin ;
Format.pp_set_max_indent ft gp.max_indent ;
Format.pp_set_max_boxes ft gp.max_depth ;
Format.pp_set_ellipsis_text ft gp.ellipsis
let set_dflt_gp ft = set_gp ft dflt_gp
let get_gp ft =
{ margin = Format.pp_get_margin ft ();
max_indent = Format.pp_get_max_indent ft ();
max_depth = Format.pp_get_max_boxes ft ();
ellipsis = Format.pp_get_ellipsis_text ft () }
(* with_fp : 'a pp_formatter_params -> Format.formatter
* returns of formatter for given formatter functions *)
let with_fp chan out_function flush_function =
let ft = Format.make_formatter out_function flush_function in
Format.pp_set_formatter_out_channel ft chan;
ft
(* Output on a channel ch *)
let with_output_to ch =
let ft = with_fp ch (output ch) (fun () -> flush ch) in
set_gp ft deep_gp;
ft
let std_ft = ref Format.std_formatter
let _ = set_dflt_gp !std_ft
let err_ft = ref Format.err_formatter
let _ = set_gp !err_ft deep_gp
let deep_ft = ref (with_output_to stdout)
let _ = set_gp !deep_ft deep_gp
(* For parametrization through vernacular *)
let default = Format.pp_get_max_boxes !std_ft ()
let default_margin = Format.pp_get_margin !std_ft ()
let get_depth_boxes () = Some (Format.pp_get_max_boxes !std_ft ())
let set_depth_boxes v =
Format.pp_set_max_boxes !std_ft (match v with None -> default | Some v -> v)
let get_margin () = Some (Format.pp_get_margin !std_ft ())
let set_margin v =
let v = match v with None -> default_margin | Some v -> v in
Format.pp_set_margin Format.str_formatter v;
Format.pp_set_margin !std_ft v;
Format.pp_set_margin !deep_ft v;
(* Heuristic, based on usage: the column on the right of max_indent
column is 20% of width, capped to 30 characters *)
let m = max (64 * v / 100) (v-30) in
Format.pp_set_max_indent Format.str_formatter m;
Format.pp_set_max_indent !std_ft m;
Format.pp_set_max_indent !deep_ft m
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