moved uwobo sources to the root uwobo directory

[helm.git] / helm / uwobo / uwobo_styles.ml

diff --git a/helm/uwobo/uwobo_styles.ml b/helm/uwobo/uwobo_styles.ml
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+++ b/helm/uwobo/uwobo_styles.ml
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+(*
+ * Copyright (C) 2003:
+ *    Stefano Zacchiroli <zack@cs.unibo.it>
+ *    for the HELM Team http://helm.cs.unibo.it/
+ *
+ *  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://helm.cs.unibo.it/
+ *)
+
+open Printf;;
+
+exception Stylesheet_not_found of string;;
+exception Stylesheet_already_in of string;;
+
+class styles =
+  object (self)
+    (* INVARIANT: 'stylesheets' and 'uris' are in sync *)
+
+    val mutable stylesheets = []
+    val mutable uris = []
+    val domImpl = Gdome.domImplementation ()
+
+      (** process an XSLT stylesheet *)
+    method private process uri = domImpl#createDocumentFromURI ~uri ()
+
+    method get keys =
+      let rev_keys = List.rev keys in
+      let last_key = List.hd rev_keys in
+      let p_stylesheets =
+        List.fold_left
+          (fun collected_styles key ->
+            let (key, stylesheet) =
+              try
+                List.find (fun (k, _) -> k = key) stylesheets
+              with Not_found -> raise (Stylesheet_not_found key)
+            in
+            (key, Gdome_xslt.processStylesheet stylesheet)::collected_styles)
+          []
+          rev_keys
+      in
+      let last_stylesheet =
+        snd (List.find (fun (k, _) -> k = last_key) stylesheets)
+      in
+      (p_stylesheets, last_stylesheet)
+
+    method add key uri =
+      if (List.mem_assoc key uris) then
+        raise (Stylesheet_already_in key)
+      else begin
+        uris <- (key, uri) :: uris;
+        stylesheets <- (key, self#process uri) :: stylesheets
+      end
+
+    method remove key =
+      if not (List.mem_assoc key uris) then
+        raise (Stylesheet_not_found key)
+      else begin
+        uris <- List.remove_assoc key uris;
+        stylesheets <- List.remove_assoc key stylesheets
+      end
+
+    method removeAll = uris <- []; stylesheets <- []
+
+    method list =
+      List.map
+        (fun (key, uri) ->
+          sprintf "key = %s, uri = %s" key (List.assoc key uris))
+        uris
+
+    method reload key =
+      (try
+        let uri = List.assoc key uris in
+        stylesheets <-
+          (key, self#process uri) :: (List.remove_assoc key stylesheets)
+      with Not_found ->
+        raise (Stylesheet_not_found key))
+
+    method reloadAll =
+      stylesheets <- List.map (fun (key, uri) -> (key, self#process uri)) uris
+
+  end
+