DTM changes

 * Updated dom-text-mapper to 3fb30bee (master branch)
 * Updated Annotator to 631c1345 (typed-packaging branch)

These are all internal DTM / Annotator changes.
The communcation about DOM changes has migrated from method calls
to events.

See also https://github.com/hypothesis/dom-text-mapper/issues/14

h/lib/_annotator_mapsrc/src/plugin/pdf.coffee

@@ -48,11 +48,12 @@ class window.PDFTextMapper extends window.PageTextMapperCore
         @_unmapPage @pageInfo[index]
 
     # Do something about cross-page selections
-    window.DomTextMapper.instances.push
-      id: "cross-page catcher"
-      rootNode: document.getElementById "viewer"
-      performUpdateOnNode: (node, data) =>
+    viewer = document.getElementById "viewer"
+    viewer.addEventListener "domChange", (event) =>
+      node = event.srcElement
+      data = event.data
       if "viewer" is node.getAttribute? "id"
+        console.log "Detected cross-page change event."
         # This event escaped the pages.
         # Must be a cross-page selection.
         if data.start? and data.end?
@@ -61,8 +62,6 @@ class window.PDFTextMapper extends window.PageTextMapperCore
           for index in [ startPage.index .. endPage.index ]
             #console.log "Should rescan page #" + index
             @_updateMap @pageInfo[index]
-      documentChanged: ->
-      timestamp: ->
 
     $(PDFView.container).on 'scroll', => @_onScroll()
 

h/lib/_annotator_mapsrc/src/plugin/texthighlights.coffee

@@ -67,7 +67,10 @@ class TextHighlight extends Annotator.Highlight
 
     for node in normedRange.textNodes() when not white.test node.nodeValue
       r = @$(node).wrapAll(hl).parent().show()[0]
-      window.DomTextMapper?.changed node, "created hilite"
+      event = document.createEvent "UIEvents"
+      event.initUIEvent "domChange", true, false, window, 0
+      event.reason = "created hilite"
+      node.dispatchEvent event
       r
 
   # Public: highlight a list of ranges
@@ -121,8 +124,11 @@ class TextHighlight extends Annotator.Highlight
         # We should restore original state
         child = hl.childNodes[0]
         @$(hl).replaceWith hl.childNodes
-        window.DomTextMapper?.changed child.parentNode,
-          "removed hilite (annotation deleted)"
+
+        event = document.createEvent "UIEvents"
+        event.initUIEvent "domChange", true, false, window, 0
+        event.reason = "removed hilite (annotation deleted)"
+        child.parentNode.dispatchEvent event
 
   # Get the HTML elements making up the highlight
   _getDOMElements: -> @_highlights

h/lib/_annotator_mapsrc/src/range.coffee

@@ -211,9 +211,12 @@ class Range.BrowserRange
     while nr.commonAncestor.nodeType isnt Node.ELEMENT_NODE
       nr.commonAncestor = nr.commonAncestor.parentNode
 
-    if window.DomTextMapper? and changed
-#      console.log "Ranged normalization changed the DOM, updating d-t-m"
-      window.DomTextMapper.changed nr.commonAncestor, "range normalization", nr
+    if changed
+      event = document.createEvent "UIEvents"
+      event.initUIEvent "domChange", true, false, window, 0
+      event.reason = "range normalization"
+      event.data = nr
+      nr.commonAncestor.dispatchEvent event
 
     new Range.NormalizedRange(nr)
 

h/lib/annotator.js

 // Generated by CoffeeScript 1.6.3
 /*
-** Annotator 1.2.6-dev-3d4ae84
+** Annotator 1.2.6-dev-6bedfd2
 ** https://github.com/okfn/annotator/
 **
 ** Copyright 2012 Aron Carroll, Rufus Pollock, and Nick Stenning.
 ** Dual licensed under the MIT and GPLv3 licenses.
 ** https://github.com/okfn/annotator/blob/master/LICENSE
 **
-** Built at: 2013-11-28 15:22:14Z
+** Built at: 2013-11-28 17:54:20Z
 */
 
 
@@ -492,7 +492,7 @@
     }
 
     BrowserRange.prototype.normalize = function(root) {
-      var changed, n, node, nr, r;
+      var changed, event, n, node, nr, r;
       if (this.tainted) {
         console.error(_t("You may only call normalize() once on a BrowserRange!"));
         return false;
@@ -557,8 +557,12 @@
       while (nr.commonAncestor.nodeType !== Node.ELEMENT_NODE) {
         nr.commonAncestor = nr.commonAncestor.parentNode;
       }
-      if ((window.DomTextMapper != null) && changed) {
-        window.DomTextMapper.changed(nr.commonAncestor, "range normalization", nr);
+      if (changed) {
+        event = document.createEvent("UIEvents");
+        event.initUIEvent("domChange", true, false, window, 0);
+        event.reason = "range normalization";
+        event.data = nr;
+        nr.commonAncestor.dispatchEvent(event);
       }
       return new Range.NormalizedRange(nr);
     };

h/lib/annotator.pdf.js

 // Generated by CoffeeScript 1.6.3
 /*
-** Annotator 1.2.6-dev-2000a65
+** Annotator 1.2.6-dev-6bedfd2
 ** https://github.com/okfn/annotator/
 **
 ** Copyright 2012 Aron Carroll, Rufus Pollock, and Nick Stenning.
 ** Dual licensed under the MIT and GPLv3 licenses.
 ** https://github.com/okfn/annotator/blob/master/LICENSE
 **
-** Built at: 2013-11-26 10:43:03Z
+** Built at: 2013-11-28 18:04:55Z
 */
 
 
@@ -61,7 +61,8 @@
     }
 
     PDFTextMapper.prototype.setEvents = function() {
-      var _this = this;
+      var viewer,
+        _this = this;
       addEventListener("pagerender", function(evt) {
         var index;
         if (_this.pageInfo == null) {
@@ -78,12 +79,13 @@
           return _this._unmapPage(_this.pageInfo[index]);
         }
       });
-      window.DomTextMapper.instances.push({
-        id: "cross-page catcher",
-        rootNode: document.getElementById("viewer"),
-        performUpdateOnNode: function(node, data) {
-          var endPage, index, startPage, _i, _ref, _ref1, _results;
+      viewer = document.getElementById("viewer");
+      viewer.addEventListener("domChange", function(event) {
+        var data, endPage, index, node, startPage, _i, _ref, _ref1, _results;
+        node = event.srcElement;
+        data = event.data;
         if ("viewer" === (typeof node.getAttribute === "function" ? node.getAttribute("id") : void 0)) {
+          console.log("Detected cross-page change event.");
           if ((data.start != null) && (data.end != null)) {
             startPage = _this.getPageForNode(data.start);
             endPage = _this.getPageForNode(data.end);
@@ -94,9 +96,6 @@
             return _results;
           }
         }
-        },
-        documentChanged: function() {},
-        timestamp: function() {}
       });
       return $(PDFView.container).on('scroll', function() {
         return _this._onScroll();

h/lib/annotator.pdf.map

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+{"version":3,"file":"annotator.pdf.js","sources":["_preamble.coffee","_annotator_mapsrc/src/plugin/pdf.coffee"],"names":[],"mappings":";AAAA;;;;;;;;;;CAAA;CAAA;;;;;;;ACCA;CAAA,GAAA,EAAA;KAAA;;oSAAA;;CAAA,CAAM,IAAM;CAGV;;CAAA,EAAa,CAAb,KAAa,CAAb,GAAC;CAAe,GAAA,MAAA;CAAH,EAA0B;CAAvC,IAAa;;CAAb,EAE4B,CAF5B,sBAEA;;CAFA,EAKc,MAAA,GAAd;CAAyB,IAAK,EAAN,MAAP;CALjB,IAKc;;CALd,EAQc,MAAA,GAAd;CAAyB,EAAO,CAAf,GAAO,MAAP;CARjB,IAQc;;CARd,EAWc,EAAA,IAAC,GAAf;CAAiC,EAAO,CAAf,CAAe,EAAR,MAAP;CAXzB,IAWc;;CAXd,EAciB,EAAA,IAAC,MAAlB;CACE,SAAA,CAAA;CAAA,IAAsC,CAAtC;CAfF,IAciB;;CAdjB,EAkBoB,EAAA,IAAC,SAArB;CACU,IAAM,EAAP,EAAuB,IAA9B;CAnBF,IAkBoB;;CAGP,EAAA,CAAA,mBAAA;CACX,gDAAA;CAAA,gEAAA;CAAA,GAAC,EAAD,GAAA;CAtBF,IAqBa;;CArBb,EAyBW,MAAX;CAEE,KAAA,IAAA;SAAA,GAAA;CAAA,CAA+B,CAAA,GAA/B,GAAgC,GAAhC,IAAA;CAIE,IAAA,OAAA;CAAA,GAAc,IAAd,cAAA;CAAA,eAAA;UAAA;CAAA,EAEQ,EAAR,CAAkB,EAAlB,EAAQ;CACP,IAAA,UAAD;CAPF,MAA+B;CAA/B,CAUmC,CAAA,GAAnC,GAAoC,OAApC;CACE,UAAA,CAAA;CAAA,EAAO,CAAP,EAAA,EAAA;CACA,GAAG,CAAiB,GAApB,CAAmF,EAAzC,CAAvC;CACD,CAAmC,CAA3B,CAAa,CAArB,CAAiB,EAAT,EAAR;CAGC,IAAA,GAAqB,EAAtB,OAAA;UAN+B;CAAnC,MAAmC;CAVnC,EAmBS,GAAT,EAAiB,MAAR;CAnBT,CAoBqC,CAAA,EAAA,CAArC,GAAsC,EAAtC,KAAA;CACE,WAAA,oDAAA;CAAA,EAAO,CAAP,CAAY,GAAZ,EAAA;CAAA,EACO,CAAP,CAAY,GAAZ;CACA,EAAe,CAAZ,IAAH;CACE,EAAA,IAAO,GAAP,yBAAA;CAGA,GAAG,MAAH,QAAA,EAAG;CACD,EAAY,CAAoB,CAAnB,IAAb,GAAA,EAAY;CAAZ,EACU,CAAoB,CAAnB,EAAX,KAAA,EAAU;AACV,CAAA;GAAA,eAAa,wHAAb;CAEE,IAAC,GAAqB,EAAtB;CAFF;6BAHF;YAJF;UAHmC;CAArC,MAAqC;CAcrC,CAAA,CAAkC,IAAzB,CAAT,CAAA,IAAA;CAAsC,IAAA,IAAD,MAAA;CAArC,MAAkC;CA7DpC,IAyBW;;CAzBX,EA+DoB,IA/DpB,WA+DA;;CA/DA,EAgEqB,CAAA,KAAC,UAAtB;CAAoC,CAA6B,CAAlC,CAAI,GAAJ,MAAA,KAAA;CAhE/B,IAgEqB;;CAhErB,EAmEM,CAAN,KAAM;CAEJ,SAAA,EAAA;;CAAC,EAAmB,CAAnB,CAAwB,EAAL,CAApB;QAAA;CAGA,GAAO,EAAP,qBAAA;CAGE,EAAY,KAAZ,CAAY,CAAZ;CAAgB,GAAD,CAAC,YAAD;CAAJ,CAAc,CAAzB,MAAY;CACZ,GAAQ,OAAR,IAAO;QAPT;CAAA,EAUwB,CAAxB,EAAA,CAAO,EAAiB;CACtB,EAAA,IAAO,CAAP,uBAAA;CAAA,CAAA,CAEY,EAAX,GAAD;CACC,IAAA,UAAD,CAAA;CAJF,MAAwB;CAOvB,GAAA,SAAD;CAtFF,IAmEM;;CAnEN,EA4FkB,MAAC,OAAnB;CAEE,GAAA,MAAA;SAAA,GAAA;CAAA,EAAO,CAAP,CAA6C,CAA7C,GAA6C,IAAP,IAAd;CAGnB,EAAsB,CAAvB,KAAwB,IAA5B,CAAA;CAGE,WAAA,aAAA;CAAA,EAAa,KAAb,EAAA;;CAAc;CAAA;gBAAA,2BAAA;6BAAA;CAAA,GAAI;CAAJ;;CAAD,EAAA,CAAA;CAAb,EAGU,EAAC,EAAX,CAAA,EAAU,SAAA;CAHV,EAMuB,EAAtB,GAAD,CAAU;CAAa,CAAS,KAAT,GAAA;CANvB,SAAA;CAQA,EAAuC,CAApC,CAAa,CAAA,CAAO,CAAvB,CAAG;CACA,IAAA,MAAD,MAAA;MADF,IAAA;CAGG,EAA6B,EAA7B,IAAiB,OAAlB,CAAA;UAduB;CAA3B,MAA2B;CAjG7B,IA4FkB;;CA5FlB,EAkHa,MAAA,EAAb;CAEE,GAAC,EAAD,aAAA;CAAA,GAGC,EAAD,CAAA,IAAY;CAGX,GAAA,QAAD,CAAA;CA1HF,IAkHa;;CAlHb,EA8HgB,CAAA,KAAC,KAAjB;CAEE,SAAA;CAAA,EAAA,CAAA,EAAA;CACA,EACM,CAAmB,CAAJ,EAElB,CAFA,GAED,CAFA,CAAA,sBAAA;CAIA,EAAA,KAAA,EAAA;CANF,MACA;CADA,CASkC,CAA1B,EAAR,CAAA,EAAQ,EAAuB;CAG9B,GAAA,CAAS,GAAA,KAAV;CA5IF,IA8HgB;;CA9HhB;;CAHiC,KAAM;;CAAzC,CAmJM,IAAgB,GAAP;CAEb;;;;;CAAA;;CAAA,EAAY,MAAA,CAAZ;AAES,CAAP,GAAA,EAAA,CAAyB,EAAR,IAAjB;CACE,aAAM,+CAAN;QADF;CAGC,GAAA,GAAD,EAAU,IAAV,WAAmC;CAEjC,CAAM,EAAN,IAAA;CAAA,CACQ,IAAR,EAAA,KADA;CAPQ,OAKV;CALF,IAAY;;CAAZ;;CAFiC,QAAS;CAnJ5C"}
\ No newline at end of file

h/lib/annotator.texthighlights.js

 // Generated by CoffeeScript 1.6.3
 /*
-** Annotator 1.2.6-dev-9183f7e
+** Annotator 1.2.6-dev-6bedfd2
 ** https://github.com/okfn/annotator/
 **
 ** Copyright 2012 Aron Carroll, Rufus Pollock, and Nick Stenning.
 ** Dual licensed under the MIT and GPLv3 licenses.
 ** https://github.com/okfn/annotator/blob/master/LICENSE
 **
-** Built at: 2013-11-28 15:40:48Z
+** Built at: 2013-11-28 17:56:16Z
 */
 
 
@@ -71,7 +71,7 @@
     };
 
     TextHighlight.prototype._highlightRange = function(normedRange, cssClass) {
-      var hl, node, r, white, _i, _len, _ref, _ref1, _results;
+      var event, hl, node, r, white, _i, _len, _ref, _results;
       if (cssClass == null) {
         cssClass = 'annotator-hl';
       }
@@ -85,9 +85,10 @@
           continue;
         }
         r = this.$(node).wrapAll(hl).parent().show()[0];
-        if ((_ref1 = window.DomTextMapper) != null) {
-          _ref1.changed(node, "created hilite");
-        }
+        event = document.createEvent("UIEvents");
+        event.initUIEvent("domChange", true, false, window, 0);
+        event.reason = "created hilite";
+        node.dispatchEvent(event);
         _results.push(r);
       }
       return _results;
@@ -137,7 +138,7 @@
     };
 
     TextHighlight.prototype.removeFromDocument = function() {
-      var child, hl, _i, _len, _ref, _ref1, _results;
+      var child, event, hl, _i, _len, _ref, _results;
       _ref = this._highlights;
       _results = [];
       for (_i = 0, _len = _ref.length; _i < _len; _i++) {
@@ -145,7 +146,10 @@
         if ((hl.parentNode != null) && this.annotator.domMapper.isPageMapped(this.pageIndex)) {
           child = hl.childNodes[0];
           this.$(hl).replaceWith(hl.childNodes);
-          _results.push((_ref1 = window.DomTextMapper) != null ? _ref1.changed(child.parentNode, "removed hilite (annotation deleted)") : void 0);
+          event = document.createEvent("UIEvents");
+          event.initUIEvent("domChange", true, false, window, 0);
+          event.reason = "removed hilite (annotation deleted)";
+          _results.push(child.parentNode.dispatchEvent(event));
         } else {
           _results.push(void 0);
         }

h/lib/annotator.texthighlights.map

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+{"version":3,"file":"annotator.texthighlights.js","sources":["_preamble.coffee","_annotator_mapsrc/src/plugin/texthighlights.coffee"],"names":[],"mappings":";AAAA;;;;;;;;;;CAAA;CAAA;;;;;;;ACGA;CAAA,KAAA,aAAA;KAAA;;0JAAA;;CAAA,CAAM;CAIJ;;CAAA,EAAa,CAAb,KAAA,IAAC;;CAAD,EACK,CAAL,KAAc,IAAb;;CADD,EAEiB,CAAjB,SAAC,EAFD;;CAAA,EAKa,CAAb,GAAa,EAAC,CAAd,GAAC;CAA0B,GAAA,GAAD,CAAA,KAAA,CAAA;CAL1B,IAKa;;CALb,EAQuB,CAAvB,GAAuB,EAAC,IAAvB,OAAD;CACG,GAAA,GAAD,MAAA,gBAAA;CATF,IAQuB;;CARvB,CAAA,CAYU,CAAV,GAAA,MAAC;;CAZD,EAeQ,CAAR,CAAA,IAAS,IAAR;CACC,SAAA,IAAA;SAAA,GAAA;CAAA,CAAU,EAAA,EAAV,CAAU,EAAA,MAAa;CAAvB,aAAA;QAAA;CAAA,EAEiB,EAAA,CAAjB,GAAkB,KAAlB;CAEE,UAAA,CAAA;CAAA,EAAc,EAAqB,CAArB,CAAA,CAAd,CAGO,EAHP,EAA2B,EAAb;CAGJ,GAAO,QAAA,CAAa,IAAb;CAHH,QAGP;CAGO,QAAd,EAAA,EAAa,EAAb;CAVF,MAEiB;CAFjB,CAYoC,CAAa,EAAA,CAAjD,EAAA,CAAS,EAAT,IAAA;CACY,CAAwC,GAAtB,IAAnB,IAAmB,CAAA,CAA5B,EAAA;CADF,MAAiD;CAZjD,CAeoC,CAAY,EAAA,CAAhD,EAAA,CAAS,CAAT,KAAA;CACY,CAAuC,GAAtB,IAAlB,IAAkB,CAAA,CAA3B,CAAA;CADF,MAAgD;CAfhD,CAkBoC,CAAa,EAAA,CAAjD,EAAA,CAAS,EAAT,IAAA;CACY,CAAwC,GAAtB,IAAnB,IAAmB,CAAA,CAA5B,EAAA;CADF,MAAiD;CAlBjD,CAqBoC,CAAS,EAAA,CAA7C,CAAA,CAAA,CAAS,MAAT;CACY,CAAoC,GAAtB,IAAf,IAAT,CAAwB,CAAxB;CADF,MAA6C;CAG5C,GAAA,GAAO,EAAR,IAAA;CAxCF,IAeQ;;CAfR,CAiD+B,CAAd,KAAA,CAAC,EAAD,IAAjB;CACE,SAAA,yCAAA;;GADsC,KAAT;QAC7B;CAAA,EAAQ,EAAR,CAAA,CAAA;CAAA,CAEA,CAAK,CAAC,EAAN,EAAS,GAAJ,IAAI;CAQT;CAAA;YAAA,+BAAA;yBAAA;AAA6C,CAAJ,GAAI,CAAK,IAAL;;UAC3C;CAAA,CAAI,CAAA,CAAC,EAAD,CAAA,CAAJ;CAAA,EACQ,EAAR,GAAA,EAAQ,CAAA;CADR,CAE+B,EAA/B,CAAK,CAAL,EAAA,GAAA;CAFA,EAGe,EAAV,CAAL,EAAA,QAHA;CAAA,GAII,CAAJ,GAAA,KAAA;CAJA;CADF;uBAXe;CAjDjB,IAiDiB;;CAjDjB,CA0EiC,CAAf,KAAA,CAAC,GAAD,IAAlB;CACE,SAAA,aAAA;;GADwC,KAAT;QAC/B;CAAA,CAAA,CAAa,GAAb,IAAA;AACA,CAAA,UAAA,wCAAA;8BAAA;CACE,CAAqB,EAApB,CAAD,GAAA,EAAA,KAAqB;CADvB,MADA;CADgB,YAIhB;CA9EF,IA0EkB;;CAML,CAAS,CAAT,CAAA,EAAA,GAAA,EAAA,YAAC;CACZ,CAAc,IAAd,GAAA,sCAAM;CAAN,GACqB,CAArB,CAAA,GAAA,IAAa;CADb,EAGK,CAAJ,EAAD,OAAkB;CAHlB,EAIa,CAAZ,EAAD,GAAA,IAA0B;CAJ1B,EAOe,CAAd,EAAD,KAAA,IAAe;CAPf,CAQoC,EAAnC,EAAD,IAAA,CAAA,CAAA;CAzFF,IAgFa;;CAhFb,EA8Fa,MAAA,EAAb;CAAiB,GAAA,SAAD;CA9FhB,IA8Fa;;CA9Fb,EAiGc,EAAA,IAAC,GAAf;CACE,EAAc,CAAb,CAAD,CAAA,IAAA;CACA,GAAG,CAAH,CAAA;CACG,GAAA,IAAD,GAAA,IAAA,SAAA;MADF,EAAA;CAGG,GAAA,OAAD,IAAA,SAAA;QALU;CAjGd,IAiGc;;CAjGd,EAyGW,EAAA,IAAX;CACE,GAAG,CAAH,CAAA;CACG,GAAA,IAAD,GAAA,IAAA,MAAA;MADF,EAAA;CAGG,GAAA,OAAD,IAAA,MAAA;QAJO;CAzGX,IAyGW;;CAzGX,EAgHoB,MAAA,SAApB;CACE,SAAA,gCAAA;CAAA;CAAA;YAAA,+BAAA;uBAAA;CAEE,GAAG,IAAH,CAAgC,GAAV,WAAnB;CAED,CAAU,CAAF,EAAR,KAAA;CAAA,CACA,EAAC,MAAD,CAAA;CADA,EAGQ,EAAR,GAAgB,EAAhB,CAAQ;CAHR,CAI+B,EAA/B,CAAK,CAAL,IAAA,CAAA;CAJA,EAKe,EAAV,CAAL,IAAA,2BALA;CAAA,IAMK,KAAW,GAAhB;MARF,IAAA;CAAA;UAFF;CAAA;uBADkB;CAhHpB,IAgHoB;;CAhHpB,EA8HiB,MAAA,MAAjB;CAAqB,GAAA,SAAD;CA9HpB,IA8HiB;;CA9HjB;;CAJ0B,QAAS;;CAArC,CAoIM,IAAgB,GAAP;CAGb;;;;;CAAA;;CAAA,EAAY,MAAA,CAAZ;CAEY,EAAgB,MAAjB,IAAT;CAFF,IAAY;;CAAZ;;CAH4C,QAAS;CApIvD"}
\ No newline at end of file

h/lib/dom_text_mapper.coffee

@@ -7,38 +7,41 @@ class window.DomTextMapper
   SELECT_CHILDREN_INSTEAD = ["thead", "tbody", "ol", "a", "caption", "p", "span", "div", "h1", "h2", "h3", "h4", "h5", "h6", "ul", "li", "form"]
   CONTEXT_LEN = 32
 
-  @instances: []
-
-  @changed: (node, reason = "no reason", data = {}) ->
-    if @instances.length is 0 then return
-#    console.log "==== Node"
-#    console.log node
-#    console.log "has changed: " + reason
-#    console.log data
-    for instance in @instances when instance.rootNode.contains(node)
-#      console.log "Telling instance '" + instance.id + "'."
-      instance.documentChanged()
-      instance.performUpdateOnNode node, false, data
-      instance.lastScanned = instance.timestamp()
-    null
+  @instances: 0
 
   constructor: (@id)->
     @setRealRoot()
-    instances = window.DomTextMapper.instances
-    instances.push this
-    @id ?= "d-t-m #" + instances.length
+    DomTextMapper.instances += 1
+    @id ?= "d-t-m #" + DomTextMapper.instances
 
-  log: (msg) ->
-    console.log @id + ": " + msg
+  log: (msg...) ->
+    console.log @id, ": ", msg...
 
   # ===== Public methods =======
 
+  # Change handler
+  _onChange: (event) =>
+#    @log "received change event", event
+#    console.log "source", event.srcElement
+#    console.log "reason", event.reason ? "no reason"
+#    console.log "data", event.data
+    @documentChanged()
+    @performUpdateOnNode event.srcElement, false, event.data
+    @lastScanned = @timestamp()
+
+  # Change the root node, and subscribe to the events
+  _changeRootNode: (node) ->
+    @rootNode?.removeEventListener "domChange", @_onChange
+    @rootNode = node
+    @rootNode.addEventListener "domChange", @_onChange
+    node
+
   # Consider only the sub-tree beginning with the given node.
   # 
   # This will be the root node to use for all operations.
   setRootNode: (rootNode) ->
     @rootWin = window
-    @pathStartNode = @rootNode = rootNode
+    @pathStartNode = @_changeRootNode rootNode
 
   # Consider only the sub-tree beginning with the node whose ID was given.
   # 
@@ -55,7 +58,7 @@ class window.DomTextMapper
     @rootWin = iframe.contentWindow
     unless @rootWin?
       throw new Error "Can't access contents of the specified iframe!"
-    @rootNode = @rootWin.document
+    @_changeRootNode @rootWin.document
     @pathStartNode = @getBody()
 
   # Return the default path
@@ -67,7 +70,7 @@ class window.DomTextMapper
   # a different root earlier, and now you want to restore the default setting.)
   setRealRoot: ->
     @rootWin = window
-    @rootNode = document
+    @_changeRootNode document
     @pathStartNode = @getBody() 
 
   # Notify the library that the document has changed.