2 (* Copyright (C) 2002, HELM Team.
4 * This file is part of HELM, an Hypertextual, Electronic
5 * Library of Mathematics, developed at the Computer Science
6 * Department, University of Bologna, Italy.
8 * HELM is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version 2
11 * of the License, or (at your option) any later version.
13 * HELM is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with HELM; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
23 * For details, see the HELM World-Wide-Web page,
24 * http://cs.unibo.it/helm/.
30 exception Unsupported_property of string;;
32 let xslNS = Gdome.domString "http://www.w3.org/1999/XSL/Transform"
33 let outputS = Gdome.domString "output"
34 let q_outputS = Gdome.domString "xsl:output"
36 (** set a list of output properties in an xslt stylesheet, return a copy of
37 the given stylesheet modified as needed, given stylesheet wont be changed by
39 let apply_properties logger last_stylesheet props =
41 new Gdome.document_of_node (last_stylesheet#cloneNode ~deep:true)
44 let node_list = last_stylesheet#getElementsByTagNameNS xslNS outputS in
45 (match node_list#item 0 with
46 | None -> (* no xsl:output element, create it from scratch *)
47 logger#log `Debug "Creating xsl:output node ...";
48 let elt = last_stylesheet#createElementNS (Some xslNS) q_outputS in
49 let root = last_stylesheet#get_documentElement in
50 ignore (root#appendChild (elt :> Gdome.node));
52 | Some node -> new Gdome.element_of_node node)
54 let apply_property (name, value) =
55 if Uwobo_common.is_supported_property name then begin
56 logger#log `Debug (sprintf "Setting property: %s = %s" name value);
57 output_element#setAttribute
58 (Gdome.domString name)
59 (Gdome.domString value)
62 raise (Unsupported_property name)
64 List.iter apply_property props;
67 (** given a Gdome.document representing an XSLT stylesheet and an output
68 property return 'Some value' where 'value' is the property value, or None if
70 let get_property name (document: Gdome.document) =
71 let node_list = document#getElementsByTagNameNS xslNS outputS in
72 match node_list#item 0 with
75 let element = new Gdome.element_of_node node in
76 let domName = Gdome.domString name in
77 if element#hasAttribute domName then
78 Some (element#getAttribute domName)#to_string
83 ~(logger: Uwobo_logger.sysLogger)
84 ~(styles: Uwobo_styles.styles)
85 ~keys ~params ~props ~input =
86 (* "p_" prefix means "processed" *)
87 let (p_stylesheets, last_stylesheet) = styles#get keys in
88 logger#log `Debug "Creating input document ...";
89 let result = (* Gdome.document *)
91 (fun source (key, stylesheet) ->
92 logger#log `Debug (sprintf "Applying stylesheet %s ..." key);
95 List.map (fun (key,value) -> (key, "'" ^ value ^ "'")) (params key)
100 "Gdome_xslt.applyStylesheet params=%s"
101 (String.concat ", " (List.map (fun (k,v) -> k^": "^v) params)));
102 let res = Gdome_xslt.applyStylesheet ~source ~stylesheet ~params in
104 with e -> raise (Uwobo_failure (Printexc.to_string e)))
108 (* used to retrieve serialization options *)
109 let last_stylesheet =
111 apply_properties logger last_stylesheet props
112 with Unsupported_property prop ->
113 raise (Uwobo_failure (sprintf "Unsupported property: %s" prop))
115 let p_last_stylesheet = Gdome_xslt.processStylesheet last_stylesheet in
116 ((fun outchan -> (* serialization function *)
117 Gdome_xslt.saveResultToChannel
120 ~stylesheet:p_last_stylesheet),
121 (get_property "media-type" last_stylesheet), (* media-type *)
122 (get_property "encoding" last_stylesheet)) (* encoding *)