--- /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/.
+ *)
+
+let mathmlns = "http://www.w3.org/1998/Math/MathML";;
+let xmldiffns = "http://helm.cs.unibo.it/XmlDiff";;
+let helmns = "http://www.cs.unibo.it/helm";;
+
+let ds_selection = Gdome.domString "selection";;
+let ds_2 = Gdome.domString "2";;
+let ds_mathmlns = Gdome.domString mathmlns;;
+let ds_m_style = Gdome.domString "m:mstyle";;
+let ds_mathbackground = Gdome.domString "mathbackground";;
+let ds_xmldiffns = Gdome.domString xmldiffns;;
+let ds_xmldiff_type = Gdome.domString "xmldiff:type";;
+let ds_fake = Gdome.domString "fake";;
+let ds_helmns = Gdome.domString helmns;;
+let ds_xref = Gdome.domString "xref";;
+let ds_type = Gdome.domString "type";;
+let ds_yellow = Gdome.domString "yellow";;
+let ds_green = Gdome.domString "#00ff00";;
+let ds_maction = Gdome.domString "maction";;
+let ds_mtr = Gdome.domString "mtr";;
+let ds_mtd = Gdome.domString "mtd";;
+
+type highlighted_nodes = Gdome.node list;;
+
+let rec make_visible (n: Gdome.node) =
+ match n#get_parentNode with
+ None -> ()
+ | Some p ->
+ match p#get_namespaceURI, p#get_localName with
+ Some nu, Some ln when
+ nu#equals ds_mathmlns && ln#equals ds_maction ->
+ (new Gdome.element_of_node p)#setAttribute
+ ~name:ds_selection
+ ~value:ds_2 ;
+ make_visible p
+ | _,_ -> make_visible p
+;;
+
+let highlight_node_total_time = ref 0.0;;
+
+let highlight_node ?(color=ds_yellow) (doc: Gdome.document) (n: Gdome.node) =
+ let highlight (n: Gdome.node) =
+ let highlighter =
+ doc#createElementNS
+ ~namespaceURI:(Some ds_mathmlns)
+ ~qualifiedName:ds_m_style
+ in
+ highlighter#setAttribute ~name:ds_mathbackground ~value:color ;
+ highlighter#setAttributeNS
+ ~namespaceURI:(Some ds_xmldiffns)
+ ~qualifiedName:ds_xmldiff_type
+ ~value:ds_fake ;
+ let parent =
+ match n#get_parentNode with
+ None -> assert false
+ | Some p -> p
+ in
+ ignore
+ (parent#replaceChild ~oldChild:n ~newChild:(highlighter :> Gdome.node)) ;
+ ignore (highlighter#appendChild n) ;
+ (highlighter :> Gdome.node)
+ in
+ let rec find_mstylable_node n =
+ match n#get_namespaceURI, n#get_localName with
+ Some nu, Some ln when
+ nu#equals ds_mathmlns &&
+ (not (ln#equals ds_mtr)) && (not (ln#equals ds_mtd)) -> n
+ | Some nu, Some ln when
+ nu#equals ds_mathmlns &&
+ ln#equals ds_mtr || ln#equals ds_mtd ->
+ let true_child =
+ match n#get_firstChild with
+ None -> assert false
+ | Some n -> n
+ in
+ find_mstylable_node true_child
+ | _,_ ->
+ match n#get_parentNode with
+ None -> assert false
+ | Some p -> find_mstylable_node p
+ in
+ let highlighter = highlight (find_mstylable_node n) in
+ make_visible highlighter ;
+ highlighter
+;;
+
+let iter_children ~f (n:Gdome.node) =
+ let rec aux =
+ function
+ None -> ()
+ | Some n ->
+ let sibling = n#get_nextSibling in
+ (f n) ;
+ aux sibling
+ in
+ aux n#get_firstChild
+;;
+
+let highlight_nodes ~xrefs (doc:Gdome.document) =
+ let highlighted = ref [] in
+ let rec aux (n:Gdome.element) =
+ let attributeNS =
+ (n#getAttributeNS ~namespaceURI:ds_helmns
+ ~localName:ds_xref)#to_string in
+ if List.mem attributeNS xrefs then
+ highlighted :=
+ (highlight_node ~color:ds_green doc (n :> Gdome.node))::
+ !highlighted ;
+ iter_children (n :> Gdome.node)
+ ~f:(function n ->
+ if n#get_nodeType = GdomeNodeTypeT.ELEMENT_NODE then
+ aux (new Gdome.element_of_node n))
+ in
+ aux doc#get_documentElement ;
+ !highlighted
+;;
+
+let dim_nodes =
+ List.iter
+ (function (n : Gdome.node) ->
+ assert
+ (n#get_nodeType = GdomeNodeTypeT.ELEMENT_NODE &&
+ ((new Gdome.element_of_node n)#getAttributeNS
+ ~namespaceURI:ds_xmldiffns
+ ~localName:ds_type)#equals ds_fake) ;
+ let true_child =
+ match n#get_firstChild with
+ None -> assert false
+ | Some n -> n in
+ let p =
+ match n#get_parentNode with
+ None -> assert false
+ | Some n -> n
+ in
+ ignore (p#replaceChild ~oldChild:n ~newChild:true_child)
+ )
+;;
+
+let update_dom ~(from : Gdome.document) (d : Gdome.document) =
+ let rec aux (p: Gdome.node) (f: Gdome.node) (t: Gdome.node) =
+ let replace t1 =
+ if
+ t1 = GdomeNodeTypeT.ELEMENT_NODE &&
+ ((new Gdome.element_of_node f)#getAttributeNS
+ ~namespaceURI:ds_xmldiffns
+ ~localName:ds_type)#equals ds_fake
+ then
+ let true_child =
+ match f#get_firstChild with
+ None -> assert false
+ | Some n -> n
+ in
+ begin
+ ignore (p#replaceChild ~oldChild:f ~newChild:true_child) ;
+ aux p true_child t
+ end
+ else
+ let t' = from#importNode t true in
+ ignore (p#replaceChild ~newChild:t' ~oldChild:f) ;
+ (* ignore (highlight_node from t') *)
+ in
+ match
+ f#get_nodeType,t#get_nodeType
+ with
+ GdomeNodeTypeT.TEXT_NODE,GdomeNodeTypeT.TEXT_NODE ->
+ (match f#get_nodeValue, t#get_nodeValue with
+ Some v, Some v' when v#equals v' -> ()
+ | Some _, (Some _ as v') -> f#set_nodeValue v'
+ | _,_ -> assert false)
+ | GdomeNodeTypeT.ELEMENT_NODE as t1,GdomeNodeTypeT.ELEMENT_NODE ->
+ (match
+ f#get_namespaceURI,t#get_namespaceURI,f#get_localName,t#get_localName
+ with
+ Some nu, Some nu', Some ln, Some ln' when
+ ln#equals ln' && nu#equals nu' ->
+ begin
+ match f#get_attributes, t#get_attributes with
+ Some fattrs, Some tattrs ->
+ let flen = fattrs#get_length in
+ let tlen = tattrs#get_length in
+ let processed = ref [] in
+ for i = 0 to flen -1 do
+ match fattrs#item i with
+ None -> () (* CSC: sigh, togliere un nodo rompe fa decrescere la lunghezza ==> passare a un while *)
+ | Some attr ->
+ match attr#get_namespaceURI with
+ None ->
+ (* Back to DOM Level 1 ;-( *)
+ begin
+ let name = attr#get_nodeName in
+ match tattrs#getNamedItem ~name with
+ None ->
+ ignore (fattrs#removeNamedItem ~name)
+ | Some attr' ->
+ processed :=
+ (None,Some name)::!processed ;
+ match attr#get_nodeValue, attr'#get_nodeValue with
+ Some v1, Some v2 when
+ v1#equals v2
+ || (name#equals ds_selection &&
+ nu#equals ds_mathmlns &&
+ ln#equals ds_maction)
+ ->
+ ()
+ | Some v1, Some v2 ->
+ let attr'' = from#importNode attr' true in
+ ignore (fattrs#setNamedItem attr'')
+ | _,_ -> assert false
+ end
+ | Some namespaceURI ->
+ let localName =
+ match attr#get_localName with
+ Some v -> v
+ | None -> assert false
+ in
+ match
+ tattrs#getNamedItemNS ~namespaceURI ~localName
+ with
+ None ->
+ ignore
+ (fattrs#removeNamedItemNS
+ ~namespaceURI ~localName)
+ | Some attr' ->
+ processed :=
+ (Some namespaceURI,Some localName)::!processed ;
+ match attr#get_nodeValue, attr'#get_nodeValue with
+ Some v1, Some v2 when
+ v1#equals v2 ->
+ ()
+ | Some _, Some _ ->
+ let attr'' = from#importNode attr' true in
+ ignore (fattrs#setNamedItem attr'')
+ | _,_ -> assert false
+ done ;
+ for i = 0 to tlen -1 do
+ match tattrs#item i with
+ None -> assert false
+ | Some attr ->
+ let namespaceURI,localName =
+ match attr#get_namespaceURI with
+ None ->
+ None,attr#get_nodeName
+ | Some namespaceURI as v ->
+ v, match attr#get_localName with
+ None -> assert false
+ | Some v -> v
+ in
+ if
+ not
+ (List.exists
+ (function
+ None,Some localName' ->
+ (match namespaceURI with
+ None ->
+ localName#equals localName'
+ | Some _ -> false)
+ | Some namespaceURI', Some localName' ->
+ (match namespaceURI with
+ None -> false
+ | Some namespaceURI ->
+ localName#equals localName' &&
+ namespaceURI#equals namespaceURI'
+ )
+ | _,_ -> assert false
+ ) !processed)
+ then
+ let attr' = from#importNode attr false in
+ ignore (fattrs#setNamedItem attr')
+ done
+ | _,_ -> assert false
+ end ;
+ let rec dumb_diff =
+ function
+ [],[] -> ()
+ | he1::tl1,he2::tl2 ->
+ aux f he1 he2 ;
+ dumb_diff (tl1,tl2)
+ | [],tl2 ->
+ List.iter
+ (function n ->
+ let n' = from#importNode n true in
+ ignore (f#appendChild n') ;
+ (* ignore (highlight_node from n') *)
+ ()
+ ) tl2
+ | tl1,[] ->
+ List.iter (function n -> ignore (f#removeChild n)) tl1
+ in
+ let node_list_of_nodeList n =
+ let rec aux =
+ function
+ None -> []
+ | Some n when
+ n#get_nodeType = GdomeNodeTypeT.ELEMENT_NODE
+ or n#get_nodeType = GdomeNodeTypeT.TEXT_NODE ->
+ n::(aux n#get_nextSibling)
+ | Some n ->
+ aux n#get_nextSibling
+ in
+ aux n#get_firstChild
+ in
+ dumb_diff
+ (node_list_of_nodeList f, node_list_of_nodeList t)
+ | _,_,_,_ -> replace t1
+ )
+ | t1,t2 when
+ (t1 = GdomeNodeTypeT.ELEMENT_NODE || t1 = GdomeNodeTypeT.TEXT_NODE) &&
+ (t2 = GdomeNodeTypeT.ELEMENT_NODE || t2 = GdomeNodeTypeT.TEXT_NODE) ->
+ replace t1
+ | _,_ -> assert false
+ in
+ try
+ aux (d :> Gdome.node)
+ (from#get_documentElement :> Gdome.node)
+ (d#get_documentElement :> Gdome.node)
+ with
+ (GdomeInit.DOMException (e,msg) as ex) -> raise ex
+ | e -> raise e
+;;
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