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 environment : DisambiguatingParser.EnvironmentP3.t ref
53 module Make(C:DisambiguateTypes.Callbacks) =
56 module Disambiguate' = DisambiguatingParser.Make(C);;
58 class term_editor_impl
60 ?packing ?width ?height
61 ?isnotempty_callback ?share_environment_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
74 ~dictionary_uri:"dictionary-cic.xml"
75 ~mml_uri:Mathml_editor.default_mathml_stylesheet_path
76 (*CSC: togliere il path assoluto
77 ~tml_uri:Mathml_editor.default_tex_stylesheet_path
79 ~tml_uri:"/usr/share/editex/tml-litex.xsl"
83 (new GObj.event_ops mmlwidget#coerce#as_widget)#connect#button_press
84 ~callback:(fun _ -> drawing_area#misc#grab_focus () ; true) in
86 (new GObj.event_ops drawing_area#coerce#as_widget)#connect#focus_in
90 Mathml_editor.cursor_show ~editor:tex_editor ;
94 (new GObj.event_ops drawing_area#coerce#as_widget)#connect#focus_out
98 Mathml_editor.cursor_hide ~editor:tex_editor ;
101 let _ = Mathml_editor.push tex_editor '$' in
102 let dom_tree = Mathml_editor.get_mml tex_editor in
103 let _ = mmlwidget#load_doc dom_tree in
105 drawing_area#event#connect#key_press
107 let key = GdkEvent.Key.keyval e in
110 key >= 32 && key < 256 &&
111 (GdkEvent.Key.state e = [] || GdkEvent.Key.state e = [`SHIFT])
113 Mathml_editor.push tex_editor (Char.chr key)
114 else if key = GdkKeysyms._u then
117 ignore (Mathml_editor.freeze tex_editor) ;
118 Mathml_editor.reset tex_editor ;
119 Mathml_editor.push tex_editor '$' ;
120 ignore (Mathml_editor.thaw tex_editor) ;
123 else if key = GdkKeysyms._BackSpace then
124 Mathml_editor.drop tex_editor
125 (List.mem `CONTROL (GdkEvent.Key.state e))
126 else if key = GdkKeysyms._v then
127 ignore (mmlwidget#misc#convert_selection "STRING" Gdk.Atom.primary);
128 let adj = mmlwidget#get_hadjustment in
130 adj#set_value adj#upper ;
133 match share_environment_with with
136 (DisambiguatingParser.EnvironmentP3.of_string
137 DisambiguatingParser.EnvironmentP3.empty)
138 | Some obj -> obj#environment
141 match isnotempty_callback with
144 (* This approximation of the test that checks if the tree is empty *)
145 (* is utterly unprecise. We assume a tree to look as an empty tree *)
146 (* iff it is made of just one node m:mtext (which should be the *)
148 let is_empty_tree () =
149 let root = dom_tree#get_documentElement in
150 match root#get_firstChild with
152 | Some n -> n#get_nodeName#to_string = "m:mtext"
154 dom_tree#addEventListener
155 ~typ:(Gdome.domString "DOMSubtreeModified")
158 (function _ -> callback (not (is_empty_tree ()))))
164 ignore (mmlwidget#misc#connect#selection_received
165 ~callback: (fun selection_data ~time ->
166 let input = try selection_data#data with Gpointer.Null -> "" in
168 ignore (Mathml_editor.freeze tex_editor) ;
169 for i = 0 to String.length input - 1 do
170 Mathml_editor.push tex_editor input.[i]
172 ignore (Mathml_editor.thaw tex_editor) ;
175 method coerce = mmlwidget#coerce
178 ignore (Mathml_editor.freeze tex_editor) ;
179 Mathml_editor.reset tex_editor ;
180 Mathml_editor.push tex_editor '$' ;
181 ignore (Mathml_editor.thaw tex_editor) ;
184 (* The input of set_term is unquoted *)
185 method set_term txt =
187 ignore (Mathml_editor.freeze tex_editor) ;
189 let txt' = Str.global_replace (Str.regexp "_") "\\_" txt in
190 String.iter (fun ch -> Mathml_editor.push tex_editor ch) txt' ;
191 ignore (Mathml_editor.thaw tex_editor) ;
194 (* get_as_string returns the unquoted string *)
195 method get_as_string =
196 let term = Mathml_editor.get_tex tex_editor in
197 Str.global_replace (Str.regexp "^\\$\\$?") ""
198 (Str.global_replace (Str.regexp "\\$\\$?$") ""
199 (Str.global_replace (Str.regexp "\\\\_") "_" term))
201 method get_metasenv_and_term ~context ~metasenv =
209 prerr_endline ("###CSC: " ^ (Mathml_editor.get_tex tex_editor)) ;
210 let environment',metasenv,expr =
211 Disambiguate'.disambiguate_term mqi_handle
212 context metasenv (Mathml_editor.get_tex tex_editor) !environment
214 environment := environment' ;
217 method environment = environment
220 let term_editor = new term_editor_impl