+let xslNS = Gdome.domString "http://www.w3.org/1999/XSL/Transform"
+let outputS = Gdome.domString "output"
+let q_outputS = Gdome.domString "xsl:output"
+let is_supported_property name = List.mem name supported_properties
+
+ (** set a list of output properties in an xslt stylesheet, return a copy of
+ the given stylesheet modified as needed, given stylesheet wont be changed by
+ this operation *)
+let apply_properties logger last_stylesheet props =
+ let last_stylesheet =
+ new Gdome.document_of_node (last_stylesheet#cloneNode ~deep:true)
+ in
+ let output_element =
+ let node_list = last_stylesheet#getElementsByTagNameNS xslNS outputS in
+ (match node_list#item 0 with
+ | None -> (* no xsl:output element, create it from scratch *)
+ logger#log `Debug "Creating xsl:output node ...";
+ let elt = last_stylesheet#createElementNS (Some xslNS) q_outputS in
+ let root = last_stylesheet#get_documentElement in
+ ignore (root#insertBefore (elt :> Gdome.node) root#get_firstChild);
+ elt
+ | Some node -> new Gdome.element_of_node node)
+ in
+ let apply_property (name, value) =
+ if is_supported_property name then begin
+ logger#log `Debug (sprintf "Setting property: %s = %s" name value);
+ output_element#setAttribute
+ (Gdome.domString name)
+ (Gdome.domString value)
+ end
+ else
+ raise (Unsupported_property name)
+ in
+ List.iter apply_property props;
+ last_stylesheet
+
+ (** given a Gdome.document representing an XSLT stylesheet and an output
+ property return 'Some value' where 'value' is the property value, or None if
+ it's not defined *)
+let get_property name (document: Gdome.document) =
+ let node_list = document#getElementsByTagNameNS xslNS outputS in
+ match node_list#item 0 with
+ | None -> None
+ | Some node ->
+ let element = new Gdome.element_of_node node in
+ let domName = Gdome.domString name in
+ if element#hasAttribute domName then
+ Some (element#getAttribute domName)#to_string
+ else
+ None
+