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
60 ?packing ?width ?height
61 ?isnotempty_callback ?share_id_to_uris_with () : term_editor
64 GMathViewAux.single_selection_math_view
65 ?packing ?width ?height () in
66 let drawing_area = mmlwidget#get_drawing_area in
67 let _ = drawing_area#misc#set_can_focus true in
68 let _ = drawing_area#misc#grab_focus () in
70 fun l s -> prerr_endline ("TERM_EDITOR (" ^ string_of_int l ^ "): " ^ s) in
73 Mathml_editor.default_dictionary_path
74 Mathml_editor.default_mathml_stylesheet_path
75 Mathml_editor.default_tex_stylesheet_path
79 (new GObj.event_ops mmlwidget#coerce#as_widget)#connect#button_press
80 ~callback:(fun _ -> drawing_area#misc#grab_focus () ; true) in
82 (new GObj.event_ops drawing_area#coerce#as_widget)#connect#focus_in
86 Mathml_editor.cursor_show ~editor:tex_editor ;
90 (new GObj.event_ops drawing_area#coerce#as_widget)#connect#focus_out
94 Mathml_editor.cursor_hide ~editor:tex_editor ;
97 let _ = Mathml_editor.push tex_editor '$' in
98 let dom_tree = Mathml_editor.get_mml tex_editor in
99 let _ = mmlwidget#load_doc dom_tree in
101 drawing_area#event#connect#key_press
103 let key = GdkEvent.Key.keyval e in
106 if key = GdkKeysyms._space && GdkEvent.Key.state e = [] then
108 ignore (Mathml_editor.freeze tex_editor) ;
109 Mathml_editor.push tex_editor '\\' ;
110 Mathml_editor.push tex_editor ';' ;
111 ignore (Mathml_editor.thaw tex_editor)
113 (*CSC: end of pre-lexer *)
115 key >= 32 && key < 256 &&
116 (GdkEvent.Key.state e = [] || GdkEvent.Key.state e = [`SHIFT])
118 Mathml_editor.push tex_editor (Char.chr key)
119 else if key = GdkKeysyms._u then
122 ignore (Mathml_editor.freeze tex_editor) ;
123 Mathml_editor.reset tex_editor ;
124 Mathml_editor.push tex_editor '$' ;
125 ignore (Mathml_editor.thaw tex_editor) ;
128 else if key = GdkKeysyms._BackSpace then
129 Mathml_editor.drop tex_editor false ;
133 match share_id_to_uris_with with
134 None -> ref empty_id_to_uris
135 | Some obj -> obj#id_to_uris
138 match isnotempty_callback with
141 (* This approximation of the test that checks if the tree is empty *)
142 (* is utterly unprecise. We assume a tree to look as an empty tree *)
143 (* iff it is made of just one node m:mtext (which should be the *)
145 let is_empty_tree () =
146 let root = dom_tree#get_documentElement in
147 match root#get_firstChild with
149 | Some n -> n#get_nodeName#to_string = "m:mtext"
151 dom_tree#addEventListener
152 ~typ:(Gdome.domString "DOMSubtreeModified")
155 (function _ -> callback (not (is_empty_tree ()))))
159 method coerce = mmlwidget#coerce
162 ignore (Mathml_editor.freeze tex_editor) ;
163 Mathml_editor.reset tex_editor ;
164 Mathml_editor.push tex_editor '$' ;
165 ignore (Mathml_editor.thaw tex_editor) ;
168 method set_term txt =
170 ignore (Mathml_editor.freeze tex_editor) ;
172 (* we need to remove the initial and final '$' *)
173 let txt' = String.sub txt 1 (String.length txt - 2) in
174 String.iter (fun ch -> Mathml_editor.push tex_editor ch) txt' ;
175 ignore (Mathml_editor.thaw tex_editor) ;
178 method get_as_string =
179 Mathml_editor.get_tex tex_editor
181 method get_metasenv_and_term ~context ~metasenv =
189 let lexbuf = Lexing.from_string self#get_as_string in
190 let dom,mk_metasenv_and_expr =
191 TexCicTextualParserContext.main
192 ~context:name_context ~metasenv TexCicTextualLexer.token lexbuf
194 let id_to_uris',metasenv,expr =
195 Disambiguate'.disambiguate_input mqi_handle
196 context metasenv dom mk_metasenv_and_expr ~id_to_uris:!id_to_uris
198 id_to_uris := id_to_uris' ;
200 method id_to_uris = id_to_uris
203 let term_editor = new term_editor_impl