1 (* Copyright (C) 2006, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
28 type attribute = string * string (* <key, value> pair *)
30 module type GraphvizFormatter =
34 ?name:string -> ?graph_attrs:(attribute list) ->
35 ?node_attrs:(attribute list) -> ?edge_attrs:(attribute list) ->
38 val node: string -> ?attrs:(attribute list) -> Format.formatter -> unit
40 string -> string -> ?attrs:(attribute list) -> Format.formatter ->
42 val raw: string -> Format.formatter -> unit
43 val trailer: Format.formatter -> unit
50 let attribute fmt (k, v) = fprintf fmt "@[<hv2>%s=@,\"%s\",@]" k v
51 let attributes attrs fmt = List.iter (attribute fmt) attrs
52 let quote_string quote s = if quote then "\"" ^s ^ "\"" else s
54 let node name ~quote ?(attrs = []) fmt =
55 fprintf fmt "@[<hov2>%s@ [" (quote_string quote name);
59 let edge ~quote name1 name2 ?(attrs = []) fmt =
60 fprintf fmt "@[<hov2>%s ->@ %s@ ["
61 (quote_string quote name1) (quote_string quote name2);
65 let header ?(graph_type = "digraph") ?(name = "g") ?(graph_attrs = []) ?node_attrs ?edge_attrs fmt =
66 fprintf fmt "@[<hv2>%s %s {@," graph_type name;
67 List.iter (fun (k, v) -> fprintf fmt "@[<hv2>%s=@,%s;@]@," k v)
69 (match node_attrs with
70 | Some attrs -> node "node" ~quote:false ~attrs fmt
72 (match edge_attrs with
73 | Some attrs -> node "edge" ~quote:false ~attrs fmt
76 let node = node ~quote:true
77 let edge = edge ~quote:true
78 let raw s fmt = pp_print_string fmt s
79 let trailer fmt = fprintf fmt "@,}@]%!"