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 module Ast = CicNotationPt
27 module Mpres = Mpresentation
29 type mathml_markup = boxml_markup Mpres.mpres
30 and boxml_markup = mathml_markup Box.box
32 type markup = mathml_markup
34 let atop_attributes = [None, "linethickness", "0pt"]
36 let to_unicode = Utf8Macro.unicode_of_tex
38 let rec make_attributes l1 = function
42 | None -> make_attributes (List.tl l1) tl
44 let p,n = List.hd l1 in
45 (p,n,s) :: make_attributes (List.tl l1) tl)
49 | Mpresentation.Mobject (attrs, box) ->
52 | mpres -> Box.Object ([], mpres)
56 | Box.Object (attrs, mpres) ->
59 | box -> Mpresentation.Mobject ([], box)
61 let rec genuine_math =
63 | Mpresentation.Mobject ([], obj) -> not (genuine_box obj)
67 | Box.Object ([], mpres) -> not (genuine_math mpres)
70 let rec eligible_math =
72 | Mpresentation.Mobject ([], Box.Object ([], mpres)) -> eligible_math mpres
73 | Mpresentation.Mobject ([], _) -> false
76 let rec promote_to_math =
78 | Mpresentation.Mobject ([], Box.Object ([], mpres)) -> promote_to_math mpres
82 Mpresentation.Mspace (RenderingAttrs.small_skip_attributes `MathML)
84 let rec add_mpres_attributes new_attr = function
85 | Mpresentation.Mobject (attr, box) ->
86 Mpresentation.Mobject (attr, add_box_attributes new_attr box)
88 Mpresentation.set_attr (new_attr @ Mpresentation.get_attr mpres) mpres
89 and add_box_attributes new_attr = function
90 | Box.Object (attr, mpres) ->
91 Box.Object (attr, add_mpres_attributes new_attr mpres)
92 | box -> Box.set_attr (new_attr @ Box.get_attr box) box
94 let box_of mathonly spec attrs children =
96 | [t] -> add_mpres_attributes attrs t
98 let kind, spacing, indent = spec in
101 CicNotationUtil.dress small_skip children
105 if mathonly then Mpresentation.Mrow (attrs, dress children)
108 (if spacing then RenderingAttrs.spacing_attributes `BoxML else [])
109 @ (if indent then RenderingAttrs.indent_attributes `BoxML else [])
114 if List.for_all eligible_math children then
115 Mpresentation.Mrow (attrs',
116 dress (List.map promote_to_math children))
118 mpres_of_box (Box.H (attrs',
119 List.map box_of_mpres children))
120 (* | Ast.H when List.for_all genuine_math children ->
121 Mpresentation.Mrow (attrs', dress children) *)
123 mpres_of_box (Box.V (attrs',
124 List.map box_of_mpres children))
126 mpres_of_box (Box.HV (attrs',
127 List.map box_of_mpres children))
129 mpres_of_box (Box.HOV (attrs',
130 List.map box_of_mpres children))
132 let open_paren = Mpresentation.Mo ([], "(")
133 let closed_paren = Mpresentation.Mo ([], ")")
134 let open_brace = Mpresentation.Mo ([], "{")
135 let closed_brace = Mpresentation.Mo ([], "}")
136 let hidden_substs = Mpresentation.Mtext ([], "{...}")
137 let open_box_paren = Box.Text ([], "(")
138 let closed_box_paren = Box.Text ([], ")")
139 let semicolon = Mpresentation.Mo ([], ";")
140 let toggle_action children =
141 Mpresentation.Maction ([None, "actiontype", "toggle"], children)
143 type child_pos = [ `None | `Left | `Right | `Inner ]
147 | Gramext.LeftA -> "LeftA"
148 | Gramext.RightA -> "RightA"
149 | Gramext.NonA -> "NonA"
159 let rec aux_mpres = function
165 | Mpres.Mspace _ -> true
166 | Mpres.Mobject (_, box) -> aux_box box
167 | Mpres.Maction (_, [mpres])
168 | Mpres.Mrow (_, [mpres]) -> aux_mpres mpres
170 and aux_box = function
174 | Box.Object (_, mpres) -> aux_mpres mpres
179 | Box.Action (_, [box]) -> aux_box box
184 let add_parens child_prec child_assoc child_pos curr_prec t =
185 if is_atomic t then t
186 else if child_prec < curr_prec
187 || (child_prec = curr_prec &&
188 child_assoc = Gramext.LeftA &&
190 || (child_prec = curr_prec &&
191 child_assoc = Gramext.RightA &&
193 then (* parens should be added *)
195 | Mpresentation.Mobject (_, box) ->
196 mpres_of_box (Box.H ([], [ open_box_paren; box; closed_box_paren ]))
197 | mpres -> Mpresentation.Mrow ([], [open_paren; t; closed_paren])
201 let render ids_to_uris =
202 let module A = Ast in
203 let module P = Mpresentation in
204 let use_unicode = true in
207 let uri = Hashtbl.find ids_to_uris id in
209 with Not_found -> None)
211 let make_href xmlattrs xref =
215 match lookup_uri xref with
217 | Some uri -> uri :: uris)
220 let xmlattrs_uris, xmlattrs =
221 let xref_attrs, other_attrs =
223 (function Some "xlink", "href", _ -> true | _ -> false)
226 List.map (fun (_, _, uri) -> uri) xref_attrs,
230 match xmlattrs_uris @ xref_uris with
233 Some (String.concat " "
234 (HExtlib.list_uniq (List.sort String.compare uris)))
237 match !xref with [] -> None | xrefs -> Some (String.concat " " xrefs)
241 @ make_attributes [Some "helm", "xref"; Some "xlink", "href"]
246 match !xref with [] -> None | xrefs -> Some (String.concat " " xrefs)
249 make_attributes [Some "helm","xref"] [xrefs]
251 (* when mathonly is true no boxes should be generated, only mrows *)
253 let rec aux xmlattrs mathonly xref pos prec t =
255 | A.AttributedTerm _ ->
256 aux_attributes xmlattrs mathonly xref pos prec t
257 | A.Num (literal, _) ->
259 (RenderingAttrs.number_attributes `MathML)
260 @ make_href xmlattrs xref
262 Mpres.Mn (attrs, literal)
263 | A.Symbol (literal, _) ->
265 (RenderingAttrs.symbol_attributes `MathML)
266 @ make_href xmlattrs xref
268 Mpres.Mo (attrs, to_unicode literal)
269 | A.Ident (literal, subst)
270 | A.Uri (literal, subst) ->
272 (RenderingAttrs.ident_attributes `MathML)
273 @ make_href xmlattrs xref
275 let name = Mpres.Mi (attrs, to_unicode literal) in
281 box_of mathonly (A.H, false, false) []
283 :: (CicNotationUtil.dress semicolon
286 box_of mathonly (A.H, false, false) [] [
288 Mpres.Mo ([], to_unicode "\\def");
289 aux [] mathonly xref pos prec t ])
293 let substs_maction = toggle_action [ hidden_substs; substs' ] in
294 box_of mathonly (A.H, false, false) [] [ name; substs_maction ])
295 | A.Literal l -> aux_literal xmlattrs xref prec l
296 | A.UserInput -> Mpres.Mtext ([], "%")
297 | A.Layout l -> aux_layout mathonly xref pos prec l
299 | A.Variable _ -> assert false (* should have been instantiated *)
301 prerr_endline ("unexpected ast: " ^ CicNotationPp.pp_term t);
303 and aux_attributes xmlattrs mathonly xref pos prec t =
304 let new_level = ref None in
305 let new_xref = ref [] in
306 let new_xmlattrs = ref [] in
307 let rec aux_attribute =
309 | A.AttributedTerm (attr, t) ->
313 | `Level (child_prec, child_assoc) ->
314 new_level := Some (child_prec, child_assoc)
315 | `IdRef xref -> new_xref := xref :: !new_xref
316 | `XmlAttrs attrs -> new_xmlattrs := attrs @ !new_xmlattrs);
319 (match !new_level with
320 | None -> aux !new_xmlattrs mathonly new_xref pos prec t
321 | Some (child_prec, child_assoc) ->
323 aux !new_xmlattrs mathonly new_xref pos child_prec t
325 add_parens child_prec child_assoc pos prec t')
328 and aux_literal xmlattrs xref prec l =
329 let attrs = make_href xmlattrs xref in
331 | `Symbol s -> Mpres.Mo (attrs, to_unicode s)
332 | `Keyword s -> Mpres.Mo (attrs, to_unicode s)
333 | `Number s -> Mpres.Mn (attrs, to_unicode s))
334 and aux_layout mathonly xref pos prec l =
335 let attrs = make_xref xref in
336 let invoke' t = aux [] true (ref []) pos prec t in
337 (* use the one below to reset precedence and associativity *)
338 let invoke_reinit t = aux [] true (ref []) `None 0 t in
340 | A.Sub (t1, t2) -> Mpres.Msub (attrs, invoke' t1, invoke_reinit t2)
341 | A.Sup (t1, t2) -> Mpres.Msup (attrs, invoke' t1, invoke_reinit t2)
342 | A.Below (t1, t2) -> Mpres.Munder (attrs, invoke' t1, invoke_reinit t2)
343 | A.Above (t1, t2) -> Mpres.Mover (attrs, invoke' t1, invoke_reinit t2)
346 Mpres.Mfrac (attrs, invoke_reinit t1, invoke_reinit t2)
348 Mpres.Mfrac (atop_attributes @ attrs, invoke_reinit t1,
350 | A.Sqrt t -> Mpres.Msqrt (attrs, invoke_reinit t)
352 Mpres.Mroot (attrs, invoke_reinit t1, invoke_reinit t2)
353 | A.Box ((_, spacing, _) as kind, terms) ->
355 aux_children mathonly spacing xref pos prec
356 (CicNotationUtil.ungroup terms)
358 box_of mathonly kind attrs children
361 aux_children mathonly false xref pos prec
362 (CicNotationUtil.ungroup terms)
364 box_of mathonly (A.H, false, false) attrs children
365 | A.Break -> assert false (* TODO? *)
366 and aux_children mathonly spacing xref pos prec terms =
368 let rec aux_list first clusters acc =
370 [] when acc = [] -> List.rev clusters
371 | [] -> aux_list first (List.rev acc :: clusters) [] []
372 | (A.Layout A.Break) :: tl when acc = [] ->
373 aux_list first clusters [] tl
374 | (A.Layout A.Break) :: tl ->
375 aux_list first (List.rev acc :: clusters) [] tl
387 aux_list false clusters
388 (aux [] mathonly xref pos' prec hd :: acc) []
391 match pos, first with
393 | `None, false -> `Inner
394 | `Left, true -> `Left
395 | `Left, false -> `Inner
396 | `Right, _ -> `Inner
397 | `Inner, _ -> `Inner
399 aux_list false clusters
400 (aux [] mathonly xref pos' prec hd :: acc) tl
407 | tl -> box_of mathonly (A.H, spacing, false) [] tl
409 List.map boxify_pres (find_clusters terms)
411 aux [] false (ref []) `None 0
413 let rec print_box (t: boxml_markup) =
414 Box.box2xml print_mpres t
415 and print_mpres (t: mathml_markup) =
416 Mpresentation.print_mpres print_box t
418 let print_xml = print_mpres
420 (* let render_to_boxml id_to_uri t =
421 let xml_stream = print_box (box_of_mpres (render id_to_uri t)) in
422 Xml.add_xml_declaration xml_stream *)