1 (* Copyright (C) 2004-2005, 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/
26 type mathml_markup = boxml_markup Mpresentation.mpres
27 and boxml_markup = mathml_markup Box.box
29 type markup = mathml_markup
31 let atop_attributes = [None, "linethickness", "0pt"]
32 let binder_attributes = [None, "mathcolor", "blue"]
33 let indent_attributes = [None, "indent", "1em"]
35 let mpres_arrow = Mpresentation.Mo (binder_attributes, "->")
36 (* TODO unicode symbol "to" *)
37 let mpres_implicit = Mpresentation.Mtext ([], "?")
42 Utf8Macro.expand (String.sub s 1 (String.length s - 1))
44 with Utf8Macro.Macro_not_found _ -> s
46 let rec make_attributes l1 = function
48 | None :: tl -> make_attributes (List.tl l1) tl
50 let p,n = List.hd l1 in
51 (p,n,s) :: make_attributes (List.tl l1) tl
55 Mpresentation.Mobject (_, box) -> box
56 | mpres -> Box.Object ([], mpres)
60 Box.Object (_, mpres) -> mpres
61 | box -> Mpresentation.Mobject ([], box)
65 | Mpresentation.Mobject _ -> false
68 let box_of mathonly spec attrs children =
72 let kind, spacing, indent = spec in
73 let rec dress = function
76 | hd :: tl -> hd :: Mpresentation.Mtext ([], " ") :: dress tl
78 if mathonly then Mpresentation.Mrow (attrs, dress children)
81 if spacing then [None, "spacing", "0.5em"] else []
82 @ if indent then [None, "indent", "0em 0.5em"] else []
86 | CicNotationPt.H when List.for_all genuine_math children ->
87 Mpresentation.Mrow (attrs', children)
89 mpres_of_box (Box.H (attrs', List.map box_of_mpres children))
91 mpres_of_box (Box.V (attrs', List.map box_of_mpres children))
93 mpres_of_box (Box.HV (attrs', List.map box_of_mpres children))
94 | CicNotationPt.HOV ->
95 mpres_of_box (Box.HOV (attrs', List.map box_of_mpres children))
97 let open_paren = Mpresentation.Mo ([], "(")
98 let closed_paren = Mpresentation.Mo ([], ")")
99 let open_box_paren = Box.Text ([], "(")
100 let closed_box_paren = Box.Text ([], ")")
102 type child_pos = [ `Left | `Right | `Inner ]
106 | Gramext.LeftA -> "LeftA"
107 | Gramext.RightA -> "RightA"
108 | Gramext.NonA -> "NonA"
117 let module P = Mpresentation in
118 let rec aux_mpres = function
125 | P.Mobject (_, box) -> aux_box box
126 | P.Maction (_, [mpres])
127 | P.Mrow (_, [mpres]) -> aux_mpres mpres
129 and aux_box = function
133 | Box.Object (_, mpres) -> aux_mpres mpres
138 | Box.Action (_, [box]) -> aux_box box
143 let add_parens child_prec child_assoc child_pos curr_prec t =
144 prerr_endline (Printf.sprintf "add_parens %d %s %s %d" child_prec
145 (pp_assoc child_assoc) (pp_pos child_pos) (curr_prec));
146 if is_atomic t then t
147 else if child_prec < curr_prec
148 || (child_prec = curr_prec &&
149 child_assoc = Gramext.LeftA &&
151 || (child_prec = curr_prec &&
152 child_assoc = Gramext.RightA &&
154 then (* parens should be added *)
156 | Mpresentation.Mobject (_, box) ->
157 mpres_of_box (Box.H ([], [ open_box_paren; box; closed_box_paren ]))
158 | mpres -> Mpresentation.Mrow ([], [open_paren; t; closed_paren])
162 let render ids_to_uris t =
163 let module A = CicNotationPt in
164 let module P = Mpresentation in
165 let use_unicode = true in
166 let lookup_uri = function
168 | Some id -> (try Some (Hashtbl.find ids_to_uris id) with Not_found -> None)
171 let uri = lookup_uri xref in
172 make_attributes [Some "helm","xref"; Some "xlink","href"] [xref;uri]
174 let make_xref xref = make_attributes [Some "helm","xref"] [xref] in
175 let make_box = function
176 | P.Mobject (attrs, box) ->
179 | m -> Box.Object ([], m)
181 let make_hv xref children =
182 let attrs = indent_attributes @ make_href xref in
183 P.Mobject ([], Box.HV (indent_attributes, List.map make_box children))
185 let rec invoke mathonly xref prec assoc t =
186 fst (aux mathonly xref prec assoc t)
187 (* when mathonly is true no boxes should be generated, only mrows *)
188 and aux mathonly xref prec assoc t =
189 let return t = t, (prec, assoc) in
191 | A.AttributedTerm (`Loc _, t) -> return (invoke mathonly xref prec assoc t)
192 | A.AttributedTerm (`Level (prec, assoc), t) ->
193 return (invoke mathonly xref prec assoc t)
194 | A.AttributedTerm (`IdRef xref, t) ->
195 return (invoke mathonly (Some xref) prec assoc t)
197 | A.Ident (literal, _) -> return (P.Mi (make_href xref, to_unicode literal))
198 | A.Num (literal, _) -> return (P.Mn (make_href xref, to_unicode literal))
199 | A.Symbol (literal, _) -> return (P.Mo (make_href xref,to_unicode literal))
200 | A.Uri (literal, _) -> return (P.Mi (make_href xref, to_unicode literal))
202 (* default pretty printing shant' be implemented here *)
204 let children = aux_children mathonly xref prec assoc terms in
205 make_hv xref children
206 | A.Binder (`Pi, (A.Ident ("_", None), ty_opt), body)
207 | A.Binder (`Forall, (A.Ident ("_", None), ty_opt), body) ->
210 | None -> mpres_implicit
211 | Some ty -> invoke mathonly None prec assoc ty
213 let body' = invoke mathonly None prec assoc body in
214 return (make_hv xref [ty'; make_h None [mpres_arrow; body']]) *)
216 | A.Literal l -> aux_literal xref prec assoc l
217 | A.Layout l -> aux_layout mathonly xref prec assoc l
219 | A.Variable _ -> assert false (* should have been instantiated *)
222 prerr_endline (CicNotationPp.pp_term t);
225 and aux_literal xref prec assoc l =
226 let return t = t, (prec, assoc) in
227 let attrs = make_href xref in
230 | `Keyword s -> return (P.Mo (attrs, to_unicode s))
231 | `Number s -> return (P.Mn (attrs, to_unicode s))
232 and aux_layout mathonly xref prec assoc l =
233 let return t = t, (prec, assoc) in
234 let attrs = make_xref xref in
235 let invoke' t = invoke true None prec assoc t in
237 | A.Sub (t1, t2) -> return (P.Msub (attrs, invoke' t1, invoke' t2))
238 | A.Sup (t1, t2) -> return (P.Msup (attrs, invoke' t1, invoke' t2))
239 | A.Below (t1, t2) -> return (P.Munder (attrs, invoke' t1, invoke' t2))
240 | A.Above (t1, t2) -> return (P.Mover (attrs, invoke' t1, invoke' t2))
242 | A.Over (t1, t2) -> return (P.Mfrac (attrs, invoke' t1, invoke' t2))
244 return (P.Mfrac (atop_attributes @ attrs, invoke' t1, invoke' t2))
245 | A.Sqrt t -> return (P.Msqrt (attrs, invoke' t))
246 | A.Root (t1, t2) -> return (P.Mroot (attrs, invoke' t1, invoke' t2))
247 | A.Box (kind, terms) ->
248 let children = aux_children mathonly xref prec assoc terms in
249 return (box_of mathonly kind attrs children)
250 and aux_children mathonly xref prec assoc terms =
251 let rec aux_list first =
255 let t', (child_prec, child_assoc) = aux mathonly xref prec assoc t in
256 prerr_endline ("T " ^ CicNotationPp.pp_term t);
257 [add_parens child_prec child_assoc `Right prec t']
259 let t', (child_prec, child_assoc) = aux mathonly xref prec assoc t in
260 prerr_endline ( "T " ^ CicNotationPp.pp_term t);
261 let child_pos = if first then `Left else `Inner in
262 let hd = add_parens child_prec child_assoc child_pos prec t' in
263 hd :: aux_list false tl
266 [t] -> [invoke mathonly xref prec assoc t]
267 | tl -> aux_list true tl
269 fst (aux false None 0 Gramext.NonA t)
271 let render_to_boxml id_to_uri t =
272 let rec print_box (t: CicNotationPres.boxml_markup) =
273 Box.box2xml print_mpres t
274 and print_mpres (t: CicNotationPres.mathml_markup) =
275 Mpresentation.print_mpres print_box t
277 let xml_stream = print_box (box_of_mpres (render id_to_uri t)) in
278 Ast2pres.add_xml_declaration xml_stream