--- /dev/null
+(* Copyright (C) 2000-2002, HELM Team.
+ *
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ *
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ *
+ * For details, see the HELM World-Wide-Web page,
+ * http://cs.unibo.it/helm/.
+ *)
+
+(******************************************************************************)
+(* *)
+(* PROJECT HELM *)
+(* *)
+(* Claudio Sacerdoti Coen <sacerdot@cs.unibo.it> *)
+(* 06/01/2002 *)
+(* *)
+(* *)
+(******************************************************************************)
+
+(* A WIDGET TO ENTER CIC TERMS *)
+
+class type term_editor =
+ object
+ method coerce : GObj.widget
+ (* get_as_string returns the unquoted string *)
+ method get_as_string : string
+ method get_metasenv_and_term :
+ context:Cic.context ->
+ metasenv:Cic.metasenv -> Cic.metasenv * Cic.term
+ method reset : unit
+ (* The input of set_term is unquoted *)
+ method set_term : string -> unit
+ method id_to_uris : Disambiguate.domain_and_interpretation ref
+ end
+;;
+
+let empty_id_to_uris = ([],function _ -> None);;
+
+module Make(C:Disambiguate.Callbacks) =
+ struct
+
+ module Disambiguate' = Disambiguate.Make(C);;
+
+ class term_editor_impl
+ mqi_handle
+ ?packing ?width ?height
+ ?isnotempty_callback ?share_id_to_uris_with () : term_editor
+ =
+ let mmlwidget =
+ GMathViewAux.single_selection_math_view
+ ?packing ?width ?height () in
+ let drawing_area = mmlwidget#get_drawing_area in
+ let _ = drawing_area#misc#set_can_focus true in
+ let _ = drawing_area#misc#grab_focus () in
+ let logger =
+ fun l s -> prerr_endline ("TERM_EDITOR (" ^ string_of_int l ^ "): " ^ s) in
+ let tex_editor =
+ Mathml_editor.create
+ ~alt_lexer:true
+ ~dictionary_uri:"dictionary-cic.xml"
+ ~mml_uri:Mathml_editor.default_mathml_stylesheet_path
+(*CSC: togliere il path assoluto
+ ~tml_uri:Mathml_editor.default_tex_stylesheet_path
+*)
+ ~tml_uri:"/usr/share/editex/tml-litex.xsl"
+ ~log:logger
+ in
+ let _ =
+ (new GObj.event_ops mmlwidget#coerce#as_widget)#connect#button_press
+ ~callback:(fun _ -> drawing_area#misc#grab_focus () ; true) in
+ let _ =
+ (new GObj.event_ops drawing_area#coerce#as_widget)#connect#focus_in
+ ~callback:
+ (fun _ ->
+ mmlwidget#freeze ;
+ Mathml_editor.cursor_show ~editor:tex_editor ;
+ mmlwidget#thaw ;
+ true) in
+ let _ =
+ (new GObj.event_ops drawing_area#coerce#as_widget)#connect#focus_out
+ ~callback:
+ (fun _ ->
+ mmlwidget#freeze ;
+ Mathml_editor.cursor_hide ~editor:tex_editor ;
+ mmlwidget#thaw ;
+ true) in
+ let _ = Mathml_editor.push tex_editor '$' in
+ let dom_tree = Mathml_editor.get_mml tex_editor in
+ let _ = mmlwidget#load_doc dom_tree in
+ let _ =
+ drawing_area#event#connect#key_press
+ (function e ->
+ let key = GdkEvent.Key.keyval e in
+ mmlwidget#freeze ;
+ if
+ key >= 32 && key < 256 &&
+ (GdkEvent.Key.state e = [] || GdkEvent.Key.state e = [`SHIFT])
+ then
+ Mathml_editor.push tex_editor (Char.chr key)
+ else if key = GdkKeysyms._u then
+ begin
+ mmlwidget#freeze ;
+ ignore (Mathml_editor.freeze tex_editor) ;
+ Mathml_editor.reset tex_editor ;
+ Mathml_editor.push tex_editor '$' ;
+ ignore (Mathml_editor.thaw tex_editor) ;
+ mmlwidget#thaw
+ end
+ else if key = GdkKeysyms._BackSpace then
+ Mathml_editor.drop tex_editor false ;
+ mmlwidget#thaw ;
+ false) in
+ let id_to_uris =
+ match share_id_to_uris_with with
+ None -> ref empty_id_to_uris
+ | Some obj -> obj#id_to_uris
+ in
+ let _ =
+ match isnotempty_callback with
+ None -> ()
+ | Some callback ->
+ (* This approximation of the test that checks if the tree is empty *)
+ (* is utterly unprecise. We assume a tree to look as an empty tree *)
+ (* iff it is made of just one node m:mtext (which should be the *)
+ (* cursor). *)
+ let is_empty_tree () =
+ let root = dom_tree#get_documentElement in
+ match root#get_firstChild with
+ None -> true
+ | Some n -> n#get_nodeName#to_string = "m:mtext"
+ in
+ dom_tree#addEventListener
+ ~typ:(Gdome.domString "DOMSubtreeModified")
+ ~listener:
+ (Gdome.eventListener
+ (function _ -> callback (not (is_empty_tree ()))))
+ ~useCapture:false
+ in
+ object(self)
+ method coerce = mmlwidget#coerce
+ method reset =
+ mmlwidget#freeze ;
+ ignore (Mathml_editor.freeze tex_editor) ;
+ Mathml_editor.reset tex_editor ;
+ Mathml_editor.push tex_editor '$' ;
+ ignore (Mathml_editor.thaw tex_editor) ;
+ mmlwidget#thaw
+
+ (* The input of set_term is unquoted *)
+ method set_term txt =
+ mmlwidget#freeze ;
+ ignore (Mathml_editor.freeze tex_editor) ;
+ self#reset ;
+ let txt' = Str.global_replace (Str.regexp "_") "\\_" txt in
+ String.iter (fun ch -> Mathml_editor.push tex_editor ch) txt' ;
+ ignore (Mathml_editor.thaw tex_editor) ;
+ mmlwidget#thaw
+
+ (* get_as_string returns the unquoted string *)
+ method get_as_string =
+ let term = Mathml_editor.get_tex tex_editor in
+ Str.global_replace (Str.regexp "^\\$\\$?") ""
+ (Str.global_replace (Str.regexp "\\$\\$?$") ""
+ (Str.global_replace (Str.regexp "\\\\_") "_" term))
+
+ method get_metasenv_and_term ~context ~metasenv =
+ let name_context =
+ List.map
+ (function
+ Some (n,_) -> Some n
+ | None -> None
+ ) context
+ in
+prerr_endline ("###CSC: " ^ (Mathml_editor.get_tex tex_editor)) ;
+ let lexbuf = Lexing.from_string (Mathml_editor.get_tex tex_editor) in
+ let dom,mk_metasenv_and_expr =
+ TexCicTextualParserContext.main
+ ~context:name_context ~metasenv TexCicTextualLexer.token lexbuf
+ in
+ let id_to_uris',metasenv,expr =
+ Disambiguate'.disambiguate_input mqi_handle
+ context metasenv dom mk_metasenv_and_expr ~id_to_uris:!id_to_uris
+ in
+ id_to_uris := id_to_uris' ;
+ metasenv,expr
+ method id_to_uris = id_to_uris
+ end
+
+ let term_editor = new term_editor_impl
+
+end
+;;
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