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/.
27 let debug_print s = if debug then prerr_endline s
29 (******************************************************************************)
33 (* Claudio Sacerdoti Coen <sacerdot@cs.unibo.it> *)
37 (******************************************************************************)
39 (* A WIDGET TO ENTER CIC TERMS *)
41 class type term_editor =
43 method coerce : GObj.widget
44 (* get_as_string returns the unquoted string *)
45 method get_as_string : string
46 method get_metasenv_and_term :
47 context:Cic.context ->
48 metasenv:Cic.metasenv -> Cic.metasenv * Cic.term
50 (* The input of set_term is unquoted *)
51 method set_term : string -> unit
52 method environment : DisambiguatingParser.EnvironmentP3.t ref
56 module Make(C:DisambiguateTypes.Callbacks) =
59 module Disambiguate' = DisambiguatingParser.Make(C);;
61 class term_editor_impl
63 ?packing ?width ?height
64 ?isnotempty_callback ?share_environment_with () : term_editor
67 GMathViewAux.single_selection_math_view
68 ?packing ?width ?height () in
69 let drawing_area = mmlwidget#get_drawing_area in
70 let _ = drawing_area#misc#set_can_focus true in
71 let _ = drawing_area#misc#grab_focus () in
73 fun l s -> prerr_endline ("TERM_EDITOR (" ^ string_of_int l ^ "): " ^ s) in
77 ~dictionary_uri:"dictionary-cic.xml"
78 ~mml_uri:Mathml_editor.default_mathml_stylesheet_path
79 (*CSC: togliere il path assoluto
80 ~tml_uri:Mathml_editor.default_tex_stylesheet_path
82 ~tml_uri:"/usr/share/editex/tml-litex.xsl"
86 (new GObj.event_ops mmlwidget#coerce#as_widget)#connect#button_press
87 ~callback:(fun _ -> drawing_area#misc#grab_focus () ; true) in
89 (new GObj.event_ops drawing_area#coerce#as_widget)#connect#focus_in
93 Mathml_editor.cursor_show ~editor:tex_editor ;
97 (new GObj.event_ops drawing_area#coerce#as_widget)#connect#focus_out
101 Mathml_editor.cursor_hide ~editor:tex_editor ;
104 let _ = Mathml_editor.push tex_editor '$' in
105 let dom_tree = Mathml_editor.get_mml tex_editor in
106 let _ = mmlwidget#load_doc dom_tree in
108 drawing_area#event#connect#key_press
110 let key = GdkEvent.Key.keyval e in
113 key >= 32 && key < 256 &&
114 (GdkEvent.Key.state e = [] || GdkEvent.Key.state e = [`SHIFT])
116 Mathml_editor.push tex_editor (Char.chr key)
117 else if key = GdkKeysyms._u then
120 ignore (Mathml_editor.freeze tex_editor) ;
121 Mathml_editor.reset tex_editor ;
122 Mathml_editor.push tex_editor '$' ;
123 ignore (Mathml_editor.thaw tex_editor) ;
126 else if key = GdkKeysyms._BackSpace then
127 Mathml_editor.drop tex_editor
128 (List.mem `CONTROL (GdkEvent.Key.state e))
129 else if key = GdkKeysyms._v then
130 ignore (mmlwidget#misc#convert_selection "STRING" Gdk.Atom.primary);
131 let adj = mmlwidget#get_hadjustment in
133 adj#set_value adj#upper ;
136 match share_environment_with with
139 (DisambiguatingParser.EnvironmentP3.of_string
140 DisambiguatingParser.EnvironmentP3.empty)
141 | Some obj -> obj#environment
144 match isnotempty_callback with
147 (* This approximation of the test that checks if the tree is empty *)
148 (* is utterly unprecise. We assume a tree to look as an empty tree *)
149 (* iff it is made of just one node m:mtext (which should be the *)
151 let is_empty_tree () =
152 let root = dom_tree#get_documentElement in
153 match root#get_firstChild with
155 | Some n -> n#get_nodeName#to_string = "m:mtext"
157 dom_tree#addEventListener
158 ~typ:(Gdome.domString "DOMSubtreeModified")
161 (function _ -> callback (not (is_empty_tree ()))))
167 ignore (mmlwidget#misc#connect#selection_received
168 ~callback: (fun selection_data ~time ->
169 let input = try selection_data#data with Gpointer.Null -> "" in
171 ignore (Mathml_editor.freeze tex_editor) ;
172 for i = 0 to String.length input - 1 do
173 Mathml_editor.push tex_editor input.[i]
175 ignore (Mathml_editor.thaw tex_editor) ;
178 method coerce = mmlwidget#coerce
181 ignore (Mathml_editor.freeze tex_editor) ;
182 Mathml_editor.reset tex_editor ;
183 Mathml_editor.push tex_editor '$' ;
184 ignore (Mathml_editor.thaw tex_editor) ;
187 (* The input of set_term is unquoted *)
188 method set_term txt =
190 ignore (Mathml_editor.freeze tex_editor) ;
192 let txt' = Str.global_replace (Str.regexp "_") "\\_" txt in
193 String.iter (fun ch -> Mathml_editor.push tex_editor ch) txt' ;
194 ignore (Mathml_editor.thaw tex_editor) ;
197 (* get_as_string returns the unquoted string *)
198 method get_as_string =
199 let term = Mathml_editor.get_tex tex_editor in
200 Str.global_replace (Str.regexp "^\\$\\$?") ""
201 (Str.global_replace (Str.regexp "\\$\\$?$") ""
202 (Str.global_replace (Str.regexp "\\\\_") "_" term))
204 method get_metasenv_and_term ~context ~metasenv =
212 debug_print ("TexTermEditor: Raw Tex: " ^ (Mathml_editor.get_tex tex_editor)) ;
213 let environment',metasenv,expr =
215 Disambiguate'.disambiguate_term mqi_handle
216 context metasenv (Mathml_editor.get_tex tex_editor) !environment
218 [environment',metasenv,expr] -> environment',metasenv,expr
221 environment := environment' ;
224 method environment = environment
227 let term_editor = new term_editor_impl