1 (* Copyright (C) 2000, 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.
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15 * GNU General Public License for more details.
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22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
26 (******************************************************************************)
30 (* A tactic to print Coq objects in XML *)
32 (* Claudio Sacerdoti Coen <sacerdot@cs.unibo.it> *)
35 (* This module defines a pretty-printer and the stream of commands to the pp *)
37 (******************************************************************************)
40 (* the type token for XML cdata, empty elements and not-empty elements *)
43 (* Empty (prefix, element_name, *)
44 (* [prefix1, attrname1, value1 ; ... ; prefixn, attrnamen, valuen] *)
45 (* NEmpty (prefix, element_name, *)
46 (* [prefix1, attrname1, value1 ; ... ; prefixn, attrnamen, valuen], *)
50 | Empty of string option * string * (string option * string * string) list
51 | NEmpty of string option * string * (string option * string * string) list *
55 (* currified versions of the constructors make the code more readable *)
56 let xml_empty ?prefix name attrs =
57 [< 'Empty(prefix,name,attrs) >]
58 let xml_nempty ?prefix name attrs content =
59 [< 'NEmpty(prefix,name,attrs,content) >]
63 (** low level for other PPs: pretty print each token of strm applying 'f' to a
64 canonical string representation of each token *)
69 | Some p -> p ^ ":" in
76 | [< 'Empty(p,n,l) ; s >] ->
78 f ("<" ^ (pprefix p) ^ n) ;
79 List.iter (fun (p,n,v) -> f (" " ^ (pprefix p) ^ n ^ "=\"" ^ v ^ "\"")) l;
82 | [< 'NEmpty(p,n,l,c) ; s >] ->
84 f ("<" ^ (pprefix p) ^ n) ;
85 List.iter (fun (p,n,v) -> f (" " ^ (pprefix p) ^ n ^ "=\"" ^ v ^ "\"")) l;
89 f ("</" ^ (pprefix p) ^ n ^ ">\n") ;
93 for i = 1 to m do f " " done
98 (** pretty printer on output channels *)
99 let pp_to_outchan strm oc =
100 pp_gen (fun s -> output_string oc s) strm;
104 let pp_to_gzipchan strm oc =
105 pp_gen (fun s -> Gzip.output oc s 0 (String.length s)) strm
108 (** pretty printer to string *)
109 let pp_to_string strm =
110 let buf = Buffer.create 10240 in
111 pp_gen (Buffer.add_string buf) strm;
115 (** pretty printer to file *)
117 (* pp tokens None pretty prints the output on stdout *)
118 (* pp tokens (Some filename) pretty prints the output on the file filename *)
119 let pp ?(gzip=false) strm fn =
123 let outchan = Gzip.open_out filename in
125 pp_to_gzipchan strm outchan;
127 Gzip.close_out outchan;
129 Gzip.close_out outchan
130 | None -> failwith "Can't sent gzipped output to stdout"
134 let outchan = open_out filename in
136 pp_to_outchan strm outchan;
141 | None -> pp_to_outchan strm stdout
145 let profiler = HExtlib.profile "Xml.pp" in
147 profiler.HExtlib.profile (pp ?gzip strm) fn
150 let add_xml_declaration stream =
151 let box_prefix = "b" in
153 xml_cdata "<?xml version=\"1.0\" ?>\n" ;
155 xml_nempty ~prefix:box_prefix "box"
156 [ Some "xmlns","m","http://www.w3.org/1998/Math/MathML" ;
157 Some "xmlns","b","http://helm.cs.unibo.it/2003/BoxML" ;
158 Some "xmlns","helm","http://www.cs.unibo.it/helm" ;
159 Some "xmlns","xlink","http://www.w3.org/1999/xlink"
163 (* TODO BRRRRR .... *)
164 (** strip first 4 line of a string, used to strip xml declaration and doctype
165 declaration from XML strings generated by Xml.pp_to_string *)
166 let strip_xml_headings s =
169 then String.sub s pos (String.length s - pos)
170 else aux (n - 1) (String.index_from s pos '\n' + 1)