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 method get_as_string : string
42 method get_metasenv_and_term :
43 context:Cic.context ->
44 metasenv:Cic.metasenv -> Cic.metasenv * Cic.term
46 method set_term : string -> unit
47 method id_to_uris : Disambiguate.domain_and_interpretation ref
51 let empty_id_to_uris = ([],function _ -> None);;
53 module Make(C:Disambiguate.Callbacks) =
56 module Disambiguate' = Disambiguate.Make(C);;
58 class term_editor_impl
59 ?packing ?width ?height
60 ?isnotempty_callback ?share_id_to_uris_with () : term_editor
63 GMathViewAux.single_selection_math_view
64 ?packing ?width ?height () in
65 let drawing_area = mmlwidget#get_drawing_area in
66 let _ = drawing_area#misc#set_can_focus true in
67 let _ = drawing_area#misc#grab_focus () in
69 fun l s -> prerr_endline ("TERM_EDITOR (" ^ string_of_int l ^ "): " ^ s) in
72 Mathml_editor.default_dictionary_path
73 Mathml_editor.default_mathml_stylesheet_path
74 Mathml_editor.default_tex_stylesheet_path
78 (new GObj.event_ops mmlwidget#coerce#as_widget)#connect#button_press
79 ~callback:(fun _ -> drawing_area#misc#grab_focus () ; true) in
81 (new GObj.event_ops drawing_area#coerce#as_widget)#connect#focus_in
85 Mathml_editor.cursor_show ~editor:tex_editor ;
89 (new GObj.event_ops drawing_area#coerce#as_widget)#connect#focus_out
93 Mathml_editor.cursor_hide ~editor:tex_editor ;
96 let _ = Mathml_editor.push tex_editor '$' in
97 let dom_tree = Mathml_editor.get_mml tex_editor in
98 let _ = mmlwidget#load_doc dom_tree in
100 drawing_area#event#connect#key_press
102 let key = GdkEvent.Key.keyval e in
105 if key = GdkKeysyms._space && GdkEvent.Key.state e = [] then
107 ignore (Mathml_editor.freeze tex_editor) ;
108 Mathml_editor.push tex_editor '\\' ;
109 Mathml_editor.push tex_editor ';' ;
110 ignore (Mathml_editor.thaw tex_editor)
112 (*CSC: end of pre-lexer *)
114 key >= 32 && key < 256 &&
115 (GdkEvent.Key.state e = [] || GdkEvent.Key.state e = [`SHIFT])
117 Mathml_editor.push tex_editor (Char.chr key)
118 else if key = GdkKeysyms._u then
121 Mathml_editor.reset tex_editor ;
122 Mathml_editor.push tex_editor '$' ;
125 else if key = GdkKeysyms._BackSpace then
126 Mathml_editor.drop tex_editor false ;
130 match share_id_to_uris_with with
131 None -> ref empty_id_to_uris
132 | Some obj -> obj#id_to_uris
135 match isnotempty_callback with
138 (* This approximation of the test that checks if the tree is empty *)
139 (* is utterly unprecise. We assume a tree to look as an empty tree *)
140 (* iff it is made of just one node m:mtext (which should be the *)
142 let is_empty_tree () =
143 let root = dom_tree#get_documentElement in
144 match root#get_firstChild with
146 | Some n -> n#get_nodeName#to_string = "m:mtext"
148 dom_tree#addEventListener
149 ~typ:(Gdome.domString "DOMSubtreeModified")
152 (function _ -> callback (not (is_empty_tree ()))))
156 method coerce = mmlwidget#coerce
159 Mathml_editor.reset tex_editor ;
160 Mathml_editor.push tex_editor '$' ;
163 method set_term txt =
165 ignore (Mathml_editor.freeze tex_editor) ;
167 (* we need to remove the initial and final '$' *)
168 let txt' = String.sub txt 1 (String.length txt - 2) in
169 String.iter (fun ch -> Mathml_editor.push tex_editor ch) txt' ;
170 ignore (Mathml_editor.thaw tex_editor) ;
173 method get_as_string =
174 Mathml_editor.get_tex tex_editor
176 method get_metasenv_and_term ~context ~metasenv =
184 let lexbuf = Lexing.from_string self#get_as_string in
185 let dom,mk_metasenv_and_expr =
186 TexCicTextualParserContext.main
187 ~context:name_context ~metasenv TexCicTextualLexer.token lexbuf
189 let id_to_uris',metasenv,expr =
190 Disambiguate'.disambiguate_input
191 context metasenv dom mk_metasenv_and_expr ~id_to_uris:!id_to_uris
193 id_to_uris := id_to_uris' ;
195 method id_to_uris = id_to_uris
198 let term_editor = new term_editor_impl