3 * Stefano Zacchiroli <zack@cs.unibo.it>
4 * for the HELM Team http://helm.cs.unibo.it/
6 * This file is part of HELM, an Hypertextual, Electronic
7 * Library of Mathematics, developed at the Computer Science
8 * Department, University of Bologna, Italy.
10 * HELM is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version 2
13 * of the License, or (at your option) any later version.
15 * HELM is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with HELM; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
25 * For details, see the HELM World-Wide-Web page,
26 * http://helm.cs.unibo.it/
31 exception Stylesheet_not_found of string;;
32 exception Stylesheet_already_in of string;;
36 (* INVARIANT: 'stylesheets' and 'uris' are in sync *)
38 val mutable stylesheets = []
40 val domImpl = Gdome.domImplementation ()
42 (** process an XSLT stylesheet *)
43 method private process uri = domImpl#createDocumentFromURI ~uri ()
46 let rev_keys = List.rev keys in
47 let last_key = List.hd rev_keys in
50 (fun collected_styles key ->
51 let (key, stylesheet) =
53 List.find (fun (k, _) -> k = key) stylesheets
54 with Not_found -> raise (Stylesheet_not_found key)
56 (key, Gdome_xslt.processStylesheet stylesheet)::collected_styles)
61 snd (List.find (fun (k, _) -> k = last_key) stylesheets)
63 (p_stylesheets, last_stylesheet)
66 if (List.mem_assoc key uris) then
67 raise (Stylesheet_already_in key)
69 uris <- (key, uri) :: uris;
70 stylesheets <- (key, self#process uri) :: stylesheets
74 if not (List.mem_assoc key uris) then
75 raise (Stylesheet_not_found key)
77 uris <- List.remove_assoc key uris;
78 stylesheets <- List.remove_assoc key stylesheets
81 method removeAll = uris <- []; stylesheets <- []
86 sprintf "key = %s, uri = %s" key (List.assoc key uris))
91 let uri = List.assoc key uris in
93 (key, self#process uri) :: (List.remove_assoc key stylesheets)
95 raise (Stylesheet_not_found key))
98 stylesheets <- List.map (fun (key, uri) -> (key, self#process uri)) uris