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/
30 module Ast = CicNotationPt
31 module Mpres = Mpresentation
33 type mathml_markup = boxml_markup Mpres.mpres
34 and boxml_markup = mathml_markup Box.box
36 type markup = mathml_markup
38 let atop_attributes = [None, "linethickness", "0pt"]
40 let to_unicode = Utf8Macro.unicode_of_tex
42 let rec make_attributes l1 = function
46 | None -> make_attributes (List.tl l1) tl
48 let p,n = List.hd l1 in
49 (p,n,s) :: make_attributes (List.tl l1) tl)
53 | Mpresentation.Mobject (attrs, box) ->
56 | mpres -> Box.Object ([], mpres)
60 | Box.Object (attrs, mpres) ->
63 | box -> Mpresentation.Mobject ([], box)
65 let rec genuine_math =
67 | Mpresentation.Mobject ([], obj) -> not (genuine_box obj)
71 | Box.Object ([], mpres) -> not (genuine_math mpres)
74 let rec eligible_math =
76 | Mpresentation.Mobject ([], Box.Object ([], mpres)) -> eligible_math mpres
77 | Mpresentation.Mobject ([], _) -> false
80 let rec promote_to_math =
82 | Mpresentation.Mobject ([], Box.Object ([], mpres)) -> promote_to_math mpres
86 Mpresentation.Mspace (RenderingAttrs.small_skip_attributes `MathML)
88 let rec add_mpres_attributes new_attr = function
89 | Mpresentation.Mobject (attr, box) ->
90 Mpresentation.Mobject (attr, add_box_attributes new_attr box)
92 Mpresentation.set_attr (new_attr @ Mpresentation.get_attr mpres) mpres
93 and add_box_attributes new_attr = function
94 | Box.Object (attr, mpres) ->
95 Box.Object (attr, add_mpres_attributes new_attr mpres)
96 | box -> Box.set_attr (new_attr @ Box.get_attr box) box
98 let box_of mathonly spec attrs children =
100 | [t] -> add_mpres_attributes attrs t
102 let kind, spacing, indent = spec in
105 CicNotationUtil.dress small_skip children
109 if mathonly then Mpresentation.Mrow (attrs, dress children)
112 (if spacing then RenderingAttrs.spacing_attributes `BoxML else [])
113 @ (if indent then RenderingAttrs.indent_attributes `BoxML else [])
118 if List.for_all eligible_math children then
119 Mpresentation.Mrow (attrs',
120 dress (List.map promote_to_math children))
122 mpres_of_box (Box.H (attrs',
123 List.map box_of_mpres children))
124 (* | Ast.H when List.for_all genuine_math children ->
125 Mpresentation.Mrow (attrs', dress children) *)
127 mpres_of_box (Box.V (attrs',
128 List.map box_of_mpres children))
130 mpres_of_box (Box.HV (attrs',
131 List.map box_of_mpres children))
133 mpres_of_box (Box.HOV (attrs',
134 List.map box_of_mpres children))
136 let open_paren = Mpresentation.Mo ([], "(")
137 let closed_paren = Mpresentation.Mo ([], ")")
138 let open_brace = Mpresentation.Mo ([], "{")
139 let closed_brace = Mpresentation.Mo ([], "}")
140 let hidden_substs = Mpresentation.Mtext ([], "{...}")
141 let open_box_paren = Box.Text ([], "(")
142 let closed_box_paren = Box.Text ([], ")")
143 let semicolon = Mpresentation.Mo ([], ";")
144 let toggle_action children =
145 Mpresentation.Maction ([None, "actiontype", "toggle"], children)
147 type child_pos = [ `Left | `Right | `Inner ]
151 | Gramext.LeftA -> "LeftA"
152 | Gramext.RightA -> "RightA"
153 | Gramext.NonA -> "NonA"
156 let rec aux_mpres = function
162 | Mpres.Mspace _ -> true
163 | Mpres.Mobject (_, box) -> aux_box box
164 | Mpres.Maction (_, [mpres])
165 | Mpres.Mrow (_, [mpres]) -> aux_mpres mpres
167 and aux_box = function
171 | Box.Object (_, mpres) -> aux_mpres mpres
176 | Box.Action (_, [box]) -> aux_box box
181 let add_parens child_prec child_assoc child_pos curr_prec t =
184 "child_prec = %d\nchild_assoc = %s\nchild_pos = %s\ncurr_prec= %d\n\n%!")
185 child_prec (pp_assoc child_assoc) (CicNotationPp.pp_pos child_pos)
187 if is_atomic t then t
188 else if child_prec >= 0
189 && (child_prec < curr_prec
190 || (child_prec = curr_prec &&
191 child_assoc = Gramext.LeftA &&
193 || (child_prec = curr_prec &&
194 child_assoc = Gramext.RightA &&
195 child_pos <> `Right))
196 then begin (* parens should be added *)
197 (* prerr_endline "adding parens!"; *)
199 | Mpresentation.Mobject (_, box) ->
200 mpres_of_box (Box.H ([], [ open_box_paren; box; closed_box_paren ]))
201 | mpres -> Mpresentation.Mrow ([], [open_paren; t; closed_paren])
205 let render ids_to_uris =
206 let module A = Ast in
207 let module P = Mpresentation in
208 (* let use_unicode = true in *)
211 let uri = Hashtbl.find ids_to_uris id in
212 Some (UriManager.string_of_uri uri)
213 with Not_found -> None)
215 let make_href xmlattrs xref =
219 match lookup_uri xref with
221 | Some uri -> uri :: uris)
224 let xmlattrs_uris, xmlattrs =
225 let xref_attrs, other_attrs =
227 (function Some "xlink", "href", _ -> true | _ -> false)
230 List.map (fun (_, _, uri) -> uri) xref_attrs,
234 match xmlattrs_uris @ xref_uris with
237 Some (String.concat " "
238 (HExtlib.list_uniq (List.sort String.compare uris)))
241 match !xref with [] -> None | xrefs -> Some (String.concat " " xrefs)
245 @ make_attributes [Some "helm", "xref"; Some "xlink", "href"]
250 match !xref with [] -> None | xrefs -> Some (String.concat " " xrefs)
253 make_attributes [Some "helm","xref"] [xrefs]
255 (* when mathonly is true no boxes should be generated, only mrows *)
257 let rec aux xmlattrs mathonly xref pos prec t =
259 | A.AttributedTerm _ ->
260 aux_attributes xmlattrs mathonly xref pos prec t
261 | A.Num (literal, _) ->
263 (RenderingAttrs.number_attributes `MathML)
264 @ make_href xmlattrs xref
266 Mpres.Mn (attrs, literal)
267 | A.Symbol (literal, _) ->
269 (RenderingAttrs.symbol_attributes `MathML)
270 @ make_href xmlattrs xref
272 Mpres.Mo (attrs, to_unicode literal)
273 | A.Ident (literal, subst)
274 | A.Uri (literal, subst) ->
276 (RenderingAttrs.ident_attributes `MathML)
277 @ make_href xmlattrs xref
279 let name = Mpres.Mi (attrs, to_unicode literal) in
285 box_of mathonly (A.H, false, false) []
287 :: (CicNotationUtil.dress semicolon
290 box_of mathonly (A.H, false, false) [] [
292 Mpres.Mo ([], to_unicode "\\def");
293 aux [] mathonly xref pos prec t ])
297 let substs_maction = toggle_action [ hidden_substs; substs' ] in
298 box_of mathonly (A.H, false, false) [] [ name; substs_maction ])
299 | A.Literal l -> aux_literal xmlattrs xref prec l
300 | A.UserInput -> Mpres.Mtext ([], "%")
301 | A.Layout l -> aux_layout mathonly xref pos prec l
303 | A.Variable _ -> assert false (* should have been instantiated *)
305 prerr_endline ("unexpected ast: " ^ CicNotationPp.pp_term t);
307 and aux_attributes xmlattrs mathonly xref pos prec t =
308 let reset = ref false in
309 let new_level = ref None in
310 let new_xref = ref [] in
311 let new_xmlattrs = ref [] in
312 let new_pos = ref pos in
313 (* let reinit = ref false in *)
314 let rec aux_attribute =
316 | A.AttributedTerm (attr, t) ->
320 | `Level (-1, _) -> reset := true
321 | `Level (child_prec, child_assoc) ->
322 new_level := Some (child_prec, child_assoc)
323 | `IdRef xref -> new_xref := xref :: !new_xref
324 | `ChildPos pos -> new_pos := pos
325 | `XmlAttrs attrs -> new_xmlattrs := attrs @ !new_xmlattrs);
328 (match !new_level with
329 | None -> aux !new_xmlattrs mathonly new_xref !new_pos prec t
330 | Some (child_prec, child_assoc) ->
332 aux !new_xmlattrs mathonly new_xref !new_pos child_prec t in
335 else add_parens child_prec child_assoc !new_pos prec t')
338 and aux_literal xmlattrs xref prec l =
339 let attrs = make_href xmlattrs xref in
341 | `Symbol s -> Mpres.Mo (attrs, to_unicode s)
342 | `Keyword s -> Mpres.Mo (attrs, to_unicode s)
343 | `Number s -> Mpres.Mn (attrs, to_unicode s))
344 and aux_layout mathonly xref pos prec l =
345 let attrs = make_xref xref in
346 let invoke' t = aux [] true (ref []) pos prec t in
347 (* use the one below to reset precedence and associativity *)
348 let invoke_reinit t = aux [] mathonly xref `Inner ~-1 t in
350 | A.Sub (t1, t2) -> Mpres.Msub (attrs, invoke' t1, invoke_reinit t2)
351 | A.Sup (t1, t2) -> Mpres.Msup (attrs, invoke' t1, invoke_reinit t2)
352 | A.Below (t1, t2) -> Mpres.Munder (attrs, invoke' t1, invoke_reinit t2)
353 | A.Above (t1, t2) -> Mpres.Mover (attrs, invoke' t1, invoke_reinit t2)
356 Mpres.Mfrac (attrs, invoke_reinit t1, invoke_reinit t2)
358 Mpres.Mfrac (atop_attributes @ attrs, invoke_reinit t1,
360 | A.Sqrt t -> Mpres.Msqrt (attrs, invoke_reinit t)
362 Mpres.Mroot (attrs, invoke_reinit t1, invoke_reinit t2)
363 | A.Box ((_, spacing, _) as kind, terms) ->
365 aux_children mathonly spacing xref pos prec
366 (CicNotationUtil.ungroup terms)
368 box_of mathonly kind attrs children
371 aux_children mathonly false xref pos prec
372 (CicNotationUtil.ungroup terms)
374 box_of mathonly (A.H, false, false) attrs children
375 | A.Break -> assert false (* TODO? *)
376 and aux_children mathonly spacing xref pos prec terms =
378 let rec aux_list first clusters acc =
380 [] when acc = [] -> List.rev clusters
381 | [] -> aux_list first (List.rev acc :: clusters) [] []
382 | (A.Layout A.Break) :: tl when acc = [] ->
383 aux_list first clusters [] tl
384 | (A.Layout A.Break) :: tl ->
385 aux_list first (List.rev acc :: clusters) [] tl
397 aux_list false clusters
398 (aux [] mathonly xref pos prec hd :: acc) []
401 match pos, first with
403 | `None, false -> `Inner
404 | `Left, true -> `Left
405 | `Left, false -> `Inner
406 | `Right, _ -> `Inner
407 | `Inner, _ -> `Inner
409 aux_list false clusters
410 (aux [] mathonly xref pos prec hd :: acc) tl
417 | tl -> box_of mathonly (A.H, spacing, false) [] tl
419 List.map boxify_pres (find_clusters terms)
421 aux [] false (ref []) `Inner ~-1
423 let rec print_box (t: boxml_markup) =
424 Box.box2xml print_mpres t
425 and print_mpres (t: mathml_markup) =
426 Mpresentation.print_mpres print_box t
428 let print_xml = print_mpres
430 (* let render_to_boxml id_to_uri t =
431 let xml_stream = print_box (box_of_mpres (render id_to_uri t)) in
432 Xml.add_xml_declaration xml_stream *)