1 (* Copyright (C) 2000-2002, 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://cs.unibo.it/helm/.
26 (******************************************************************************)
30 (* Claudio Sacerdoti Coen <sacerdot@cs.unibo.it> *)
34 (******************************************************************************)
36 (* A WIDGET TO ENTER CIC TERMS *)
38 class type term_editor =
40 method coerce : GObj.widget
41 (* get_as_string returns the unquoted string *)
42 method get_as_string : string
43 method get_metasenv_and_term :
44 context:Cic.context ->
45 metasenv:Cic.metasenv -> Cic.metasenv * Cic.term
47 (* The input of set_term is unquoted *)
48 method set_term : string -> unit
49 method id_to_uris : Disambiguate.domain_and_interpretation ref
53 let empty_id_to_uris = ([],function _ -> None);;
55 module Make(C:Disambiguate.Callbacks) =
58 module Disambiguate' = Disambiguate.Make(C);;
60 class term_editor_impl
62 ?packing ?width ?height
63 ?isnotempty_callback ?share_id_to_uris_with () : term_editor
66 GMathViewAux.single_selection_math_view
67 ?packing ?width ?height () in
68 let drawing_area = mmlwidget#get_drawing_area in
69 let _ = drawing_area#misc#set_can_focus true in
70 let _ = drawing_area#misc#grab_focus () in
72 fun l s -> prerr_endline ("TERM_EDITOR (" ^ string_of_int l ^ "): " ^ s) in
75 Mathml_editor.default_dictionary_path
76 Mathml_editor.default_mathml_stylesheet_path
77 Mathml_editor.default_tex_stylesheet_path
81 (new GObj.event_ops mmlwidget#coerce#as_widget)#connect#button_press
82 ~callback:(fun _ -> drawing_area#misc#grab_focus () ; true) in
84 (new GObj.event_ops drawing_area#coerce#as_widget)#connect#focus_in
88 Mathml_editor.cursor_show ~editor:tex_editor ;
92 (new GObj.event_ops drawing_area#coerce#as_widget)#connect#focus_out
96 Mathml_editor.cursor_hide ~editor:tex_editor ;
99 let _ = Mathml_editor.push tex_editor '$' in
100 let dom_tree = Mathml_editor.get_mml tex_editor in
101 let _ = mmlwidget#load_doc dom_tree in
103 drawing_area#event#connect#key_press
105 let key = GdkEvent.Key.keyval e in
108 if key = GdkKeysyms._space && GdkEvent.Key.state e = [] then
110 ignore (Mathml_editor.freeze tex_editor) ;
111 Mathml_editor.push tex_editor '\\' ;
112 Mathml_editor.push tex_editor ';' ;
113 ignore (Mathml_editor.thaw tex_editor)
115 (*CSC: end of pre-lexer *)
117 key >= 32 && key < 256 &&
118 (GdkEvent.Key.state e = [] || GdkEvent.Key.state e = [`SHIFT])
120 Mathml_editor.push tex_editor (Char.chr key)
121 else if key = GdkKeysyms._u then
124 ignore (Mathml_editor.freeze tex_editor) ;
125 Mathml_editor.reset tex_editor ;
126 Mathml_editor.push tex_editor '$' ;
127 ignore (Mathml_editor.thaw tex_editor) ;
130 else if key = GdkKeysyms._BackSpace then
131 Mathml_editor.drop tex_editor false ;
135 match share_id_to_uris_with with
136 None -> ref empty_id_to_uris
137 | Some obj -> obj#id_to_uris
140 match isnotempty_callback with
143 (* This approximation of the test that checks if the tree is empty *)
144 (* is utterly unprecise. We assume a tree to look as an empty tree *)
145 (* iff it is made of just one node m:mtext (which should be the *)
147 let is_empty_tree () =
148 let root = dom_tree#get_documentElement in
149 match root#get_firstChild with
151 | Some n -> n#get_nodeName#to_string = "m:mtext"
153 dom_tree#addEventListener
154 ~typ:(Gdome.domString "DOMSubtreeModified")
157 (function _ -> callback (not (is_empty_tree ()))))
161 method coerce = mmlwidget#coerce
164 ignore (Mathml_editor.freeze tex_editor) ;
165 Mathml_editor.reset tex_editor ;
166 Mathml_editor.push tex_editor '$' ;
167 ignore (Mathml_editor.thaw tex_editor) ;
170 (* The input of set_term is unquoted *)
171 method set_term txt =
173 ignore (Mathml_editor.freeze tex_editor) ;
175 let txt' = Str.global_replace (Str.regexp "_") "\\_" txt in
176 String.iter (fun ch -> Mathml_editor.push tex_editor ch) txt' ;
177 ignore (Mathml_editor.thaw tex_editor) ;
180 (* get_as_string returns the unquoted string *)
181 method get_as_string =
182 let term = Mathml_editor.get_tex tex_editor in
183 Str.global_replace (Str.regexp "^\\$\\$?") ""
184 (Str.global_replace (Str.regexp "\\$\\$?$") ""
185 (Str.global_replace (Str.regexp "\\\\_") "_" term))
187 method get_metasenv_and_term ~context ~metasenv =
195 let lexbuf = Lexing.from_string (Mathml_editor.get_tex tex_editor) in
196 let dom,mk_metasenv_and_expr =
197 TexCicTextualParserContext.main
198 ~context:name_context ~metasenv TexCicTextualLexer.token lexbuf
200 let id_to_uris',metasenv,expr =
201 Disambiguate'.disambiguate_input mqi_handle
202 context metasenv dom mk_metasenv_and_expr ~id_to_uris:!id_to_uris
204 id_to_uris := id_to_uris' ;
206 method id_to_uris = id_to_uris
209 let term_editor = new term_editor_impl