diff --git a/build/demo/kitchen-sink/mode-xquery-uncompressed.js b/build/demo/kitchen-sink/mode-xquery-uncompressed.js
index 9061836f..8be9f6d1 100644
--- a/build/demo/kitchen-sink/mode-xquery-uncompressed.js
+++ b/build/demo/kitchen-sink/mode-xquery-uncompressed.js
@@ -118,6 +118,7 @@ oop.inherits(Mode, TextMode);
     
     this.createWorker = function(session) {
         var worker = new WorkerClient(["ace"], "worker-xquery.js", "ace/mode/xquery_worker", "XQueryWorker");
+        var self = this;
         worker.attachToDocument(session.getDocument());
         
         worker.on("error", function(e) {
@@ -129,7 +130,7 @@ oop.inherits(Mode, TextMode);
         });
         
         worker.on("highlight", function(tokens) {
-          session.getMode().$tokenizer.cache = tokens.data;
+          self.$tokenizer.cache = tokens.data;
         });
         return worker;
     };
diff --git a/build/src/mode-xquery-noconflict.js b/build/src/mode-xquery-noconflict.js
index a56176a1..01346175 100644
--- a/build/src/mode-xquery-noconflict.js
+++ b/build/src/mode-xquery-noconflict.js
@@ -1 +1 @@
-ace.define("ace/mode/xquery",["require","exports","module","ace/worker/worker_client","ace/lib/oop","ace/mode/text","ace/mode/xquery_tokenizer","ace/mode/behaviour/xquery","ace/range"],function(a,b,c){"use strict";var d=a("../worker/worker_client").WorkerClient,e=a("../lib/oop"),f=a("./text").Mode,g=a("./xquery_tokenizer").XQueryTokenizer,h=a("./behaviour/xquery").XQueryBehaviour,i=a("../range").Range,j=function(a){this.$tokenizer=new g,this.$behaviour=new h(a)};e.inherits(j,f),function(){this.getNextLineIndent=function(a,b,c){var d=this.$getIndent(b),e=b.match(/\s*(?:then|else|return|[{\(]|<\w+>)\s*$/);return e&&(d+=c),d},this.checkOutdent=function(a,b,c){return/^\s+$/.test(b)?/^\s*[\}\)]/.test(c):!1},this.autoOutdent=function(a,b,c){var d=b.getLine(c),e=d.match(/^(\s*[\}\)])/);if(!e)return 0;var f=e[1].length,g=b.findMatchingBracket({row:c,column:f});if(!g||g.row==c)return 0;var h=this.$getIndent(b.getLine(g.row));b.replace(new i(c,0,c,f-1),h)},this.$getIndent=function(a){var b=a.match(/^(\s+)/);return b?b[1]:""},this.toggleCommentLines=function(a,b,c,d){var e,f,g=!0,h=/^\s*\(:(.*):\)/;for(e=c;e<=d;e++)if(!h.test(b.getLine(e))){g=!1;break}var j=new i(0,0,0,0);for(e=c;e<=d;e++)f=b.getLine(e),j.start.row=e,j.end.row=e,j.end.column=f.length,b.replace(j,g?f.match(h)[1]:"(:"+f+":)")},this.createWorker=function(a){var b=new d(["ace"],"worker-xquery.js","ace/mode/xquery_worker","XQueryWorker");return b.attachToDocument(a.getDocument()),b.on("error",function(b){a.setAnnotations([b.data])}),b.on("ok",function(b){a.clearAnnotations()}),b.on("highlight",function(b){a.getMode().$tokenizer.cache=b.data}),b}}.call(j.prototype),b.Mode=j}),ace.define("ace/mode/xquery_tokenizer",["require","exports","module","ace/tokenizer","ace/mode/xquery_highlight_rules"],function(a,b,c){"use strict";var d=a("../tokenizer").Tokenizer,e=a("./xquery_highlight_rules").XQueryHighlightRules,f=b.XQueryTokenizer=function(){this.cache=[],this.$regexpTokenizer=new d((new e).getRules())};(function(){this.getLineTokens=function(a,b){var c=null;for(var d in this.cache){var e=this.cache[d];if(e&&e.line==a&&e.state==b)return e.tokens}return this.$regexpTokenizer.getLineTokens(a,b)}}).call(f.prototype)}),ace.define("ace/mode/xquery_highlight_rules",["require","exports","module","ace/lib/oop","ace/lib/lang","ace/mode/text_highlight_rules"],function(a,b,c){"use strict";var d=a("../lib/oop"),e=a("../lib/lang"),f=a("./text_highlight_rules").TextHighlightRules,g=function(){var a=e.arrayToMap("return|for|let|where|order|by|declare|function|variable|xquery|version|option|namespace|import|module|when|encoding|switch|default|try|catch|group|tumbling|sliding|window|start|end|at|only|using|stemming|while|external|if|then|else|as|and|or|typeswitch|case|ascending|descending|empty|in|count|updating|insert|delete|replace|value|node|attribute|text|element|into|of|with|contains".split("|"));this.$rules={start:[{token:"text",regex:"<\\!\\[CDATA\\[",next:"cdata"},{token:"xml_pe",regex:"<\\?.*?\\?>"},{token:"comment",regex:"<\\!--",next:"comment"},{token:"comment",regex:"\\(:",next:"comment"},{token:"text",regex:"<\\/?",next:"tag"},{token:"constant",regex:"[+-]?\\d+(?:(?:\\.\\d*)?(?:[eE][+-]?\\d+)?)?\\b"},{token:"variable",regex:"\\$[a-zA-Z_][a-zA-Z0-9_\\-:]*\\b"},{token:"string",regex:'".*?"'},{token:"string",regex:"'.*?'"},{token:"text",regex:"\\s+"},{token:"support.function",regex:"\\w[\\w+_\\-:]+(?=\\()"},{token:function(b){return a[b]?"keyword":"identifier"},regex:"[a-zA-Z_$][a-zA-Z0-9_$]*\\b"},{token:"keyword.operator",regex:"\\*|=|<|>|\\-|\\+|and|or|eq|ne|lt|gt"},{token:"lparen",regex:"[[({]"},{token:"rparen",regex:"[\\])}]"}],tag:[{token:"text",regex:">",next:"start"},{token:"meta.tag",regex:"[-_a-zA-Z0-9:]+"},{token:"text",regex:"\\s+"},{token:"string",regex:'".*?"'},{token:"string",regex:"'.*?'"}],cdata:[{token:"text",regex:"\\]\\]>",next:"start"},{token:"text",regex:"\\s+"},{token:"text",regex:"(?:[^\\]]|\\](?!\\]>))+"}],comment:[{token:"comment",regex:".*?-->",next:"start"},{token:"comment",regex:".*:\\)",next:"start"},{token:"comment",regex:".+"}]}};d.inherits(g,f),b.XQueryHighlightRules=g}),ace.define("ace/mode/behaviour/xquery",["require","exports","module","ace/lib/oop","ace/mode/behaviour","ace/mode/behaviour/cstyle"],function(a,b,c){"use strict";var d=a("../../lib/oop"),e=a("../behaviour").Behaviour,f=a("./cstyle").CstyleBehaviour,g=function(a){this.inherit(f,["braces","parens","string_dquotes"]),this.parent=a,this.add("brackets","insertion",function(a,b,c,d,e){if(e=="\n"){var f=c.getCursorPosition(),g=d.doc.getLine(f.row),h=g.substring(f.column,f.column+2);if(h=="</"){var i=this.$getIndent(d.doc.getLine(f.row))+d.getTabString(),j=this.$getIndent(d.doc.getLine(f.row));return{text:"\n"+i+"\n"+j,selection:[1,i.length,1,i.length]}}}return!1}),this.add("slash","insertion",function(b,c,d,e,f){if(f=="/"){var g=d.getCursorPosition(),h=e.doc.getLine(g.row);if(g.column>0&&h.charAt(g.column-1)=="<"){h=h.substring(0,g.column)+"/"+h.substring(g.column);var i=e.doc.getAllLines();i[g.row]=h,a.exec("closeTag",i.join(e.doc.getNewLineCharacter()),g.row)}}return!1})};d.inherits(g,e),b.XQueryBehaviour=g}),ace.define("ace/mode/behaviour/cstyle",["require","exports","module","ace/lib/oop","ace/mode/behaviour"],function(a,b,c){"use strict";var d=a("../../lib/oop"),e=a("../behaviour").Behaviour,f=function(){this.add("braces","insertion",function(a,b,c,d,e){if(e=="{"){var f=c.getSelectionRange(),g=d.doc.getTextRange(f);return g!==""?{text:"{"+g+"}",selection:!1}:{text:"{}",selection:[1,1]}}if(e=="}"){var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column,h.column+1);if(j=="}"){var k=d.$findOpeningBracket("}",{column:h.column+1,row:h.row});if(k!==null)return{text:"",selection:[1,1]}}}else if(e=="\n"){var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column,h.column+1);if(j=="}"){var l=d.findMatchingBracket({row:h.row,column:h.column+1});if(!l)return null;var m=this.getNextLineIndent(a,i.substring(0,i.length-1),d.getTabString()),n=this.$getIndent(d.doc.getLine(l.row));return{text:"\n"+m+"\n"+n,selection:[1,m.length,1,m.length]}}}}),this.add("braces","deletion",function(a,b,c,d,e){var f=d.doc.getTextRange(e);if(!e.isMultiLine()&&f=="{"){var g=d.doc.getLine(e.start.row),h=g.substring(e.end.column,e.end.column+1);if(h=="}")return e.end.column++,e}}),this.add("parens","insertion",function(a,b,c,d,e){if(e=="("){var f=c.getSelectionRange(),g=d.doc.getTextRange(f);return g!==""?{text:"("+g+")",selection:!1}:{text:"()",selection:[1,1]}}if(e==")"){var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column,h.column+1);if(j==")"){var k=d.$findOpeningBracket(")",{column:h.column+1,row:h.row});if(k!==null)return{text:"",selection:[1,1]}}}}),this.add("parens","deletion",function(a,b,c,d,e){var f=d.doc.getTextRange(e);if(!e.isMultiLine()&&f=="("){var g=d.doc.getLine(e.start.row),h=g.substring(e.start.column+1,e.start.column+2);if(h==")")return e.end.column++,e}}),this.add("string_dquotes","insertion",function(a,b,c,d,e){if(e=='"'){var f=c.getSelectionRange(),g=d.doc.getTextRange(f);if(g!=="")return{text:'"'+g+'"',selection:!1};var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column-1,h.column);if(j=="\\")return null;var k=d.getTokens(f.start.row,f.start.row)[0].tokens,l=0,m,n=-1;for(var o=0;o<k.length;o++){m=k[o],m.type=="string"?n=-1:n<0&&(n=m.value.indexOf('"'));if(m.value.length+l>f.start.column)break;l+=k[o].value.length}if(!m||n<0&&m.type!=="comment"&&(m.type!=="string"||f.start.column!==m.value.length+l-1&&m.value.lastIndexOf('"')===m.value.length-1))return{text:'""',selection:[1,1]};if(m&&m.type==="string"){var p=i.substring(h.column,h.column+1);if(p=='"')return{text:"",selection:[1,1]}}}}),this.add("string_dquotes","deletion",function(a,b,c,d,e){var f=d.doc.getTextRange(e);if(!e.isMultiLine()&&f=='"'){var g=d.doc.getLine(e.start.row),h=g.substring(e.start.column+1,e.start.column+2);if(h=='"')return e.end.column++,e}})};d.inherits(f,e),b.CstyleBehaviour=f})
\ No newline at end of file
+ace.define("ace/mode/xquery",["require","exports","module","ace/worker/worker_client","ace/lib/oop","ace/mode/text","ace/mode/xquery_tokenizer","ace/mode/behaviour/xquery","ace/range"],function(a,b,c){"use strict";var d=a("../worker/worker_client").WorkerClient,e=a("../lib/oop"),f=a("./text").Mode,g=a("./xquery_tokenizer").XQueryTokenizer,h=a("./behaviour/xquery").XQueryBehaviour,i=a("../range").Range,j=function(a){this.$tokenizer=new g,this.$behaviour=new h(a)};e.inherits(j,f),function(){this.getNextLineIndent=function(a,b,c){var d=this.$getIndent(b),e=b.match(/\s*(?:then|else|return|[{\(]|<\w+>)\s*$/);return e&&(d+=c),d},this.checkOutdent=function(a,b,c){return/^\s+$/.test(b)?/^\s*[\}\)]/.test(c):!1},this.autoOutdent=function(a,b,c){var d=b.getLine(c),e=d.match(/^(\s*[\}\)])/);if(!e)return 0;var f=e[1].length,g=b.findMatchingBracket({row:c,column:f});if(!g||g.row==c)return 0;var h=this.$getIndent(b.getLine(g.row));b.replace(new i(c,0,c,f-1),h)},this.$getIndent=function(a){var b=a.match(/^(\s+)/);return b?b[1]:""},this.toggleCommentLines=function(a,b,c,d){var e,f,g=!0,h=/^\s*\(:(.*):\)/;for(e=c;e<=d;e++)if(!h.test(b.getLine(e))){g=!1;break}var j=new i(0,0,0,0);for(e=c;e<=d;e++)f=b.getLine(e),j.start.row=e,j.end.row=e,j.end.column=f.length,b.replace(j,g?f.match(h)[1]:"(:"+f+":)")},this.createWorker=function(a){var b=new d(["ace"],"worker-xquery.js","ace/mode/xquery_worker","XQueryWorker"),c=this;return b.attachToDocument(a.getDocument()),b.on("error",function(b){a.setAnnotations([b.data])}),b.on("ok",function(b){a.clearAnnotations()}),b.on("highlight",function(a){c.$tokenizer.cache=a.data}),b}}.call(j.prototype),b.Mode=j}),ace.define("ace/mode/xquery_tokenizer",["require","exports","module","ace/tokenizer","ace/mode/xquery_highlight_rules"],function(a,b,c){"use strict";var d=a("../tokenizer").Tokenizer,e=a("./xquery_highlight_rules").XQueryHighlightRules,f=b.XQueryTokenizer=function(){this.cache=[],this.$regexpTokenizer=new d((new e).getRules())};(function(){this.getLineTokens=function(a,b){var c=null;for(var d in this.cache){var e=this.cache[d];if(e&&e.line==a&&e.state==b)return e.tokens}return this.$regexpTokenizer.getLineTokens(a,b)}}).call(f.prototype)}),ace.define("ace/mode/xquery_highlight_rules",["require","exports","module","ace/lib/oop","ace/lib/lang","ace/mode/text_highlight_rules"],function(a,b,c){"use strict";var d=a("../lib/oop"),e=a("../lib/lang"),f=a("./text_highlight_rules").TextHighlightRules,g=function(){var a=e.arrayToMap("return|for|let|where|order|by|declare|function|variable|xquery|version|option|namespace|import|module|when|encoding|switch|default|try|catch|group|tumbling|sliding|window|start|end|at|only|using|stemming|while|external|if|then|else|as|and|or|typeswitch|case|ascending|descending|empty|in|count|updating|insert|delete|replace|value|node|attribute|text|element|into|of|with|contains".split("|"));this.$rules={start:[{token:"text",regex:"<\\!\\[CDATA\\[",next:"cdata"},{token:"xml_pe",regex:"<\\?.*?\\?>"},{token:"comment",regex:"<\\!--",next:"comment"},{token:"comment",regex:"\\(:",next:"comment"},{token:"text",regex:"<\\/?",next:"tag"},{token:"constant",regex:"[+-]?\\d+(?:(?:\\.\\d*)?(?:[eE][+-]?\\d+)?)?\\b"},{token:"variable",regex:"\\$[a-zA-Z_][a-zA-Z0-9_\\-:]*\\b"},{token:"string",regex:'".*?"'},{token:"string",regex:"'.*?'"},{token:"text",regex:"\\s+"},{token:"support.function",regex:"\\w[\\w+_\\-:]+(?=\\()"},{token:function(b){return a[b]?"keyword":"identifier"},regex:"[a-zA-Z_$][a-zA-Z0-9_$]*\\b"},{token:"keyword.operator",regex:"\\*|=|<|>|\\-|\\+|and|or|eq|ne|lt|gt"},{token:"lparen",regex:"[[({]"},{token:"rparen",regex:"[\\])}]"}],tag:[{token:"text",regex:">",next:"start"},{token:"meta.tag",regex:"[-_a-zA-Z0-9:]+"},{token:"text",regex:"\\s+"},{token:"string",regex:'".*?"'},{token:"string",regex:"'.*?'"}],cdata:[{token:"text",regex:"\\]\\]>",next:"start"},{token:"text",regex:"\\s+"},{token:"text",regex:"(?:[^\\]]|\\](?!\\]>))+"}],comment:[{token:"comment",regex:".*?-->",next:"start"},{token:"comment",regex:".*:\\)",next:"start"},{token:"comment",regex:".+"}]}};d.inherits(g,f),b.XQueryHighlightRules=g}),ace.define("ace/mode/behaviour/xquery",["require","exports","module","ace/lib/oop","ace/mode/behaviour","ace/mode/behaviour/cstyle"],function(a,b,c){"use strict";var d=a("../../lib/oop"),e=a("../behaviour").Behaviour,f=a("./cstyle").CstyleBehaviour,g=function(a){this.inherit(f,["braces","parens","string_dquotes"]),this.parent=a,this.add("brackets","insertion",function(a,b,c,d,e){if(e=="\n"){var f=c.getCursorPosition(),g=d.doc.getLine(f.row),h=g.substring(f.column,f.column+2);if(h=="</"){var i=this.$getIndent(d.doc.getLine(f.row))+d.getTabString(),j=this.$getIndent(d.doc.getLine(f.row));return{text:"\n"+i+"\n"+j,selection:[1,i.length,1,i.length]}}}return!1}),this.add("slash","insertion",function(b,c,d,e,f){if(f=="/"){var g=d.getCursorPosition(),h=e.doc.getLine(g.row);if(g.column>0&&h.charAt(g.column-1)=="<"){h=h.substring(0,g.column)+"/"+h.substring(g.column);var i=e.doc.getAllLines();i[g.row]=h,a.exec("closeTag",i.join(e.doc.getNewLineCharacter()),g.row)}}return!1})};d.inherits(g,e),b.XQueryBehaviour=g}),ace.define("ace/mode/behaviour/cstyle",["require","exports","module","ace/lib/oop","ace/mode/behaviour"],function(a,b,c){"use strict";var d=a("../../lib/oop"),e=a("../behaviour").Behaviour,f=function(){this.add("braces","insertion",function(a,b,c,d,e){if(e=="{"){var f=c.getSelectionRange(),g=d.doc.getTextRange(f);return g!==""?{text:"{"+g+"}",selection:!1}:{text:"{}",selection:[1,1]}}if(e=="}"){var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column,h.column+1);if(j=="}"){var k=d.$findOpeningBracket("}",{column:h.column+1,row:h.row});if(k!==null)return{text:"",selection:[1,1]}}}else if(e=="\n"){var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column,h.column+1);if(j=="}"){var l=d.findMatchingBracket({row:h.row,column:h.column+1});if(!l)return null;var m=this.getNextLineIndent(a,i.substring(0,i.length-1),d.getTabString()),n=this.$getIndent(d.doc.getLine(l.row));return{text:"\n"+m+"\n"+n,selection:[1,m.length,1,m.length]}}}}),this.add("braces","deletion",function(a,b,c,d,e){var f=d.doc.getTextRange(e);if(!e.isMultiLine()&&f=="{"){var g=d.doc.getLine(e.start.row),h=g.substring(e.end.column,e.end.column+1);if(h=="}")return e.end.column++,e}}),this.add("parens","insertion",function(a,b,c,d,e){if(e=="("){var f=c.getSelectionRange(),g=d.doc.getTextRange(f);return g!==""?{text:"("+g+")",selection:!1}:{text:"()",selection:[1,1]}}if(e==")"){var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column,h.column+1);if(j==")"){var k=d.$findOpeningBracket(")",{column:h.column+1,row:h.row});if(k!==null)return{text:"",selection:[1,1]}}}}),this.add("parens","deletion",function(a,b,c,d,e){var f=d.doc.getTextRange(e);if(!e.isMultiLine()&&f=="("){var g=d.doc.getLine(e.start.row),h=g.substring(e.start.column+1,e.start.column+2);if(h==")")return e.end.column++,e}}),this.add("string_dquotes","insertion",function(a,b,c,d,e){if(e=='"'){var f=c.getSelectionRange(),g=d.doc.getTextRange(f);if(g!=="")return{text:'"'+g+'"',selection:!1};var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column-1,h.column);if(j=="\\")return null;var k=d.getTokens(f.start.row,f.start.row)[0].tokens,l=0,m,n=-1;for(var o=0;o<k.length;o++){m=k[o],m.type=="string"?n=-1:n<0&&(n=m.value.indexOf('"'));if(m.value.length+l>f.start.column)break;l+=k[o].value.length}if(!m||n<0&&m.type!=="comment"&&(m.type!=="string"||f.start.column!==m.value.length+l-1&&m.value.lastIndexOf('"')===m.value.length-1))return{text:'""',selection:[1,1]};if(m&&m.type==="string"){var p=i.substring(h.column,h.column+1);if(p=='"')return{text:"",selection:[1,1]}}}}),this.add("string_dquotes","deletion",function(a,b,c,d,e){var f=d.doc.getTextRange(e);if(!e.isMultiLine()&&f=='"'){var g=d.doc.getLine(e.start.row),h=g.substring(e.start.column+1,e.start.column+2);if(h=='"')return e.end.column++,e}})};d.inherits(f,e),b.CstyleBehaviour=f})
\ No newline at end of file
diff --git a/build/src/mode-xquery-uncompressed-noconflict.js b/build/src/mode-xquery-uncompressed-noconflict.js
index 4c6289ef..4faff5af 100644
--- a/build/src/mode-xquery-uncompressed-noconflict.js
+++ b/build/src/mode-xquery-uncompressed-noconflict.js
@@ -118,6 +118,7 @@ oop.inherits(Mode, TextMode);
     
     this.createWorker = function(session) {
         var worker = new WorkerClient(["ace"], "worker-xquery.js", "ace/mode/xquery_worker", "XQueryWorker");
+        var self = this;
         worker.attachToDocument(session.getDocument());
         
         worker.on("error", function(e) {
@@ -129,7 +130,7 @@ oop.inherits(Mode, TextMode);
         });
         
         worker.on("highlight", function(tokens) {
-          session.getMode().$tokenizer.cache = tokens.data;
+          self.$tokenizer.cache = tokens.data;
         });
         return worker;
     };
diff --git a/build/src/mode-xquery-uncompressed.js b/build/src/mode-xquery-uncompressed.js
index ae0c4aa3..0a349454 100644
--- a/build/src/mode-xquery-uncompressed.js
+++ b/build/src/mode-xquery-uncompressed.js
@@ -118,6 +118,7 @@ oop.inherits(Mode, TextMode);
     
     this.createWorker = function(session) {
         var worker = new WorkerClient(["ace"], "worker-xquery.js", "ace/mode/xquery_worker", "XQueryWorker");
+        var self = this;
         worker.attachToDocument(session.getDocument());
         
         worker.on("error", function(e) {
@@ -129,7 +130,7 @@ oop.inherits(Mode, TextMode);
         });
         
         worker.on("highlight", function(tokens) {
-          session.getMode().$tokenizer.cache = tokens.data;
+          self.$tokenizer.cache = tokens.data;
         });
         return worker;
     };
diff --git a/build/src/mode-xquery.js b/build/src/mode-xquery.js
index 1266e276..7270adbe 100644
--- a/build/src/mode-xquery.js
+++ b/build/src/mode-xquery.js
@@ -1 +1 @@
-define("ace/mode/xquery",["require","exports","module","ace/worker/worker_client","ace/lib/oop","ace/mode/text","ace/mode/xquery_tokenizer","ace/mode/behaviour/xquery","ace/range"],function(a,b,c){"use strict";var d=a("../worker/worker_client").WorkerClient,e=a("../lib/oop"),f=a("./text").Mode,g=a("./xquery_tokenizer").XQueryTokenizer,h=a("./behaviour/xquery").XQueryBehaviour,i=a("../range").Range,j=function(a){this.$tokenizer=new g,this.$behaviour=new h(a)};e.inherits(j,f),function(){this.getNextLineIndent=function(a,b,c){var d=this.$getIndent(b),e=b.match(/\s*(?:then|else|return|[{\(]|<\w+>)\s*$/);return e&&(d+=c),d},this.checkOutdent=function(a,b,c){return/^\s+$/.test(b)?/^\s*[\}\)]/.test(c):!1},this.autoOutdent=function(a,b,c){var d=b.getLine(c),e=d.match(/^(\s*[\}\)])/);if(!e)return 0;var f=e[1].length,g=b.findMatchingBracket({row:c,column:f});if(!g||g.row==c)return 0;var h=this.$getIndent(b.getLine(g.row));b.replace(new i(c,0,c,f-1),h)},this.$getIndent=function(a){var b=a.match(/^(\s+)/);return b?b[1]:""},this.toggleCommentLines=function(a,b,c,d){var e,f,g=!0,h=/^\s*\(:(.*):\)/;for(e=c;e<=d;e++)if(!h.test(b.getLine(e))){g=!1;break}var j=new i(0,0,0,0);for(e=c;e<=d;e++)f=b.getLine(e),j.start.row=e,j.end.row=e,j.end.column=f.length,b.replace(j,g?f.match(h)[1]:"(:"+f+":)")},this.createWorker=function(a){var b=new d(["ace"],"worker-xquery.js","ace/mode/xquery_worker","XQueryWorker");return b.attachToDocument(a.getDocument()),b.on("error",function(b){a.setAnnotations([b.data])}),b.on("ok",function(b){a.clearAnnotations()}),b.on("highlight",function(b){a.getMode().$tokenizer.cache=b.data}),b}}.call(j.prototype),b.Mode=j}),define("ace/mode/xquery_tokenizer",["require","exports","module","ace/tokenizer","ace/mode/xquery_highlight_rules"],function(a,b,c){"use strict";var d=a("../tokenizer").Tokenizer,e=a("./xquery_highlight_rules").XQueryHighlightRules,f=b.XQueryTokenizer=function(){this.cache=[],this.$regexpTokenizer=new d((new e).getRules())};(function(){this.getLineTokens=function(a,b){var c=null;for(var d in this.cache){var e=this.cache[d];if(e&&e.line==a&&e.state==b)return e.tokens}return this.$regexpTokenizer.getLineTokens(a,b)}}).call(f.prototype)}),define("ace/mode/xquery_highlight_rules",["require","exports","module","ace/lib/oop","ace/lib/lang","ace/mode/text_highlight_rules"],function(a,b,c){"use strict";var d=a("../lib/oop"),e=a("../lib/lang"),f=a("./text_highlight_rules").TextHighlightRules,g=function(){var a=e.arrayToMap("return|for|let|where|order|by|declare|function|variable|xquery|version|option|namespace|import|module|when|encoding|switch|default|try|catch|group|tumbling|sliding|window|start|end|at|only|using|stemming|while|external|if|then|else|as|and|or|typeswitch|case|ascending|descending|empty|in|count|updating|insert|delete|replace|value|node|attribute|text|element|into|of|with|contains".split("|"));this.$rules={start:[{token:"text",regex:"<\\!\\[CDATA\\[",next:"cdata"},{token:"xml_pe",regex:"<\\?.*?\\?>"},{token:"comment",regex:"<\\!--",next:"comment"},{token:"comment",regex:"\\(:",next:"comment"},{token:"text",regex:"<\\/?",next:"tag"},{token:"constant",regex:"[+-]?\\d+(?:(?:\\.\\d*)?(?:[eE][+-]?\\d+)?)?\\b"},{token:"variable",regex:"\\$[a-zA-Z_][a-zA-Z0-9_\\-:]*\\b"},{token:"string",regex:'".*?"'},{token:"string",regex:"'.*?'"},{token:"text",regex:"\\s+"},{token:"support.function",regex:"\\w[\\w+_\\-:]+(?=\\()"},{token:function(b){return a[b]?"keyword":"identifier"},regex:"[a-zA-Z_$][a-zA-Z0-9_$]*\\b"},{token:"keyword.operator",regex:"\\*|=|<|>|\\-|\\+|and|or|eq|ne|lt|gt"},{token:"lparen",regex:"[[({]"},{token:"rparen",regex:"[\\])}]"}],tag:[{token:"text",regex:">",next:"start"},{token:"meta.tag",regex:"[-_a-zA-Z0-9:]+"},{token:"text",regex:"\\s+"},{token:"string",regex:'".*?"'},{token:"string",regex:"'.*?'"}],cdata:[{token:"text",regex:"\\]\\]>",next:"start"},{token:"text",regex:"\\s+"},{token:"text",regex:"(?:[^\\]]|\\](?!\\]>))+"}],comment:[{token:"comment",regex:".*?-->",next:"start"},{token:"comment",regex:".*:\\)",next:"start"},{token:"comment",regex:".+"}]}};d.inherits(g,f),b.XQueryHighlightRules=g}),define("ace/mode/behaviour/xquery",["require","exports","module","ace/lib/oop","ace/mode/behaviour","ace/mode/behaviour/cstyle"],function(a,b,c){"use strict";var d=a("../../lib/oop"),e=a("../behaviour").Behaviour,f=a("./cstyle").CstyleBehaviour,g=function(a){this.inherit(f,["braces","parens","string_dquotes"]),this.parent=a,this.add("brackets","insertion",function(a,b,c,d,e){if(e=="\n"){var f=c.getCursorPosition(),g=d.doc.getLine(f.row),h=g.substring(f.column,f.column+2);if(h=="</"){var i=this.$getIndent(d.doc.getLine(f.row))+d.getTabString(),j=this.$getIndent(d.doc.getLine(f.row));return{text:"\n"+i+"\n"+j,selection:[1,i.length,1,i.length]}}}return!1}),this.add("slash","insertion",function(b,c,d,e,f){if(f=="/"){var g=d.getCursorPosition(),h=e.doc.getLine(g.row);if(g.column>0&&h.charAt(g.column-1)=="<"){h=h.substring(0,g.column)+"/"+h.substring(g.column);var i=e.doc.getAllLines();i[g.row]=h,a.exec("closeTag",i.join(e.doc.getNewLineCharacter()),g.row)}}return!1})};d.inherits(g,e),b.XQueryBehaviour=g}),define("ace/mode/behaviour/cstyle",["require","exports","module","ace/lib/oop","ace/mode/behaviour"],function(a,b,c){"use strict";var d=a("../../lib/oop"),e=a("../behaviour").Behaviour,f=function(){this.add("braces","insertion",function(a,b,c,d,e){if(e=="{"){var f=c.getSelectionRange(),g=d.doc.getTextRange(f);return g!==""?{text:"{"+g+"}",selection:!1}:{text:"{}",selection:[1,1]}}if(e=="}"){var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column,h.column+1);if(j=="}"){var k=d.$findOpeningBracket("}",{column:h.column+1,row:h.row});if(k!==null)return{text:"",selection:[1,1]}}}else if(e=="\n"){var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column,h.column+1);if(j=="}"){var l=d.findMatchingBracket({row:h.row,column:h.column+1});if(!l)return null;var m=this.getNextLineIndent(a,i.substring(0,i.length-1),d.getTabString()),n=this.$getIndent(d.doc.getLine(l.row));return{text:"\n"+m+"\n"+n,selection:[1,m.length,1,m.length]}}}}),this.add("braces","deletion",function(a,b,c,d,e){var f=d.doc.getTextRange(e);if(!e.isMultiLine()&&f=="{"){var g=d.doc.getLine(e.start.row),h=g.substring(e.end.column,e.end.column+1);if(h=="}")return e.end.column++,e}}),this.add("parens","insertion",function(a,b,c,d,e){if(e=="("){var f=c.getSelectionRange(),g=d.doc.getTextRange(f);return g!==""?{text:"("+g+")",selection:!1}:{text:"()",selection:[1,1]}}if(e==")"){var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column,h.column+1);if(j==")"){var k=d.$findOpeningBracket(")",{column:h.column+1,row:h.row});if(k!==null)return{text:"",selection:[1,1]}}}}),this.add("parens","deletion",function(a,b,c,d,e){var f=d.doc.getTextRange(e);if(!e.isMultiLine()&&f=="("){var g=d.doc.getLine(e.start.row),h=g.substring(e.start.column+1,e.start.column+2);if(h==")")return e.end.column++,e}}),this.add("string_dquotes","insertion",function(a,b,c,d,e){if(e=='"'){var f=c.getSelectionRange(),g=d.doc.getTextRange(f);if(g!=="")return{text:'"'+g+'"',selection:!1};var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column-1,h.column);if(j=="\\")return null;var k=d.getTokens(f.start.row,f.start.row)[0].tokens,l=0,m,n=-1;for(var o=0;o<k.length;o++){m=k[o],m.type=="string"?n=-1:n<0&&(n=m.value.indexOf('"'));if(m.value.length+l>f.start.column)break;l+=k[o].value.length}if(!m||n<0&&m.type!=="comment"&&(m.type!=="string"||f.start.column!==m.value.length+l-1&&m.value.lastIndexOf('"')===m.value.length-1))return{text:'""',selection:[1,1]};if(m&&m.type==="string"){var p=i.substring(h.column,h.column+1);if(p=='"')return{text:"",selection:[1,1]}}}}),this.add("string_dquotes","deletion",function(a,b,c,d,e){var f=d.doc.getTextRange(e);if(!e.isMultiLine()&&f=='"'){var g=d.doc.getLine(e.start.row),h=g.substring(e.start.column+1,e.start.column+2);if(h=='"')return e.end.column++,e}})};d.inherits(f,e),b.CstyleBehaviour=f})
\ No newline at end of file
+define("ace/mode/xquery",["require","exports","module","ace/worker/worker_client","ace/lib/oop","ace/mode/text","ace/mode/xquery_tokenizer","ace/mode/behaviour/xquery","ace/range"],function(a,b,c){"use strict";var d=a("../worker/worker_client").WorkerClient,e=a("../lib/oop"),f=a("./text").Mode,g=a("./xquery_tokenizer").XQueryTokenizer,h=a("./behaviour/xquery").XQueryBehaviour,i=a("../range").Range,j=function(a){this.$tokenizer=new g,this.$behaviour=new h(a)};e.inherits(j,f),function(){this.getNextLineIndent=function(a,b,c){var d=this.$getIndent(b),e=b.match(/\s*(?:then|else|return|[{\(]|<\w+>)\s*$/);return e&&(d+=c),d},this.checkOutdent=function(a,b,c){return/^\s+$/.test(b)?/^\s*[\}\)]/.test(c):!1},this.autoOutdent=function(a,b,c){var d=b.getLine(c),e=d.match(/^(\s*[\}\)])/);if(!e)return 0;var f=e[1].length,g=b.findMatchingBracket({row:c,column:f});if(!g||g.row==c)return 0;var h=this.$getIndent(b.getLine(g.row));b.replace(new i(c,0,c,f-1),h)},this.$getIndent=function(a){var b=a.match(/^(\s+)/);return b?b[1]:""},this.toggleCommentLines=function(a,b,c,d){var e,f,g=!0,h=/^\s*\(:(.*):\)/;for(e=c;e<=d;e++)if(!h.test(b.getLine(e))){g=!1;break}var j=new i(0,0,0,0);for(e=c;e<=d;e++)f=b.getLine(e),j.start.row=e,j.end.row=e,j.end.column=f.length,b.replace(j,g?f.match(h)[1]:"(:"+f+":)")},this.createWorker=function(a){var b=new d(["ace"],"worker-xquery.js","ace/mode/xquery_worker","XQueryWorker"),c=this;return b.attachToDocument(a.getDocument()),b.on("error",function(b){a.setAnnotations([b.data])}),b.on("ok",function(b){a.clearAnnotations()}),b.on("highlight",function(a){c.$tokenizer.cache=a.data}),b}}.call(j.prototype),b.Mode=j}),define("ace/mode/xquery_tokenizer",["require","exports","module","ace/tokenizer","ace/mode/xquery_highlight_rules"],function(a,b,c){"use strict";var d=a("../tokenizer").Tokenizer,e=a("./xquery_highlight_rules").XQueryHighlightRules,f=b.XQueryTokenizer=function(){this.cache=[],this.$regexpTokenizer=new d((new e).getRules())};(function(){this.getLineTokens=function(a,b){var c=null;for(var d in this.cache){var e=this.cache[d];if(e&&e.line==a&&e.state==b)return e.tokens}return this.$regexpTokenizer.getLineTokens(a,b)}}).call(f.prototype)}),define("ace/mode/xquery_highlight_rules",["require","exports","module","ace/lib/oop","ace/lib/lang","ace/mode/text_highlight_rules"],function(a,b,c){"use strict";var d=a("../lib/oop"),e=a("../lib/lang"),f=a("./text_highlight_rules").TextHighlightRules,g=function(){var a=e.arrayToMap("return|for|let|where|order|by|declare|function|variable|xquery|version|option|namespace|import|module|when|encoding|switch|default|try|catch|group|tumbling|sliding|window|start|end|at|only|using|stemming|while|external|if|then|else|as|and|or|typeswitch|case|ascending|descending|empty|in|count|updating|insert|delete|replace|value|node|attribute|text|element|into|of|with|contains".split("|"));this.$rules={start:[{token:"text",regex:"<\\!\\[CDATA\\[",next:"cdata"},{token:"xml_pe",regex:"<\\?.*?\\?>"},{token:"comment",regex:"<\\!--",next:"comment"},{token:"comment",regex:"\\(:",next:"comment"},{token:"text",regex:"<\\/?",next:"tag"},{token:"constant",regex:"[+-]?\\d+(?:(?:\\.\\d*)?(?:[eE][+-]?\\d+)?)?\\b"},{token:"variable",regex:"\\$[a-zA-Z_][a-zA-Z0-9_\\-:]*\\b"},{token:"string",regex:'".*?"'},{token:"string",regex:"'.*?'"},{token:"text",regex:"\\s+"},{token:"support.function",regex:"\\w[\\w+_\\-:]+(?=\\()"},{token:function(b){return a[b]?"keyword":"identifier"},regex:"[a-zA-Z_$][a-zA-Z0-9_$]*\\b"},{token:"keyword.operator",regex:"\\*|=|<|>|\\-|\\+|and|or|eq|ne|lt|gt"},{token:"lparen",regex:"[[({]"},{token:"rparen",regex:"[\\])}]"}],tag:[{token:"text",regex:">",next:"start"},{token:"meta.tag",regex:"[-_a-zA-Z0-9:]+"},{token:"text",regex:"\\s+"},{token:"string",regex:'".*?"'},{token:"string",regex:"'.*?'"}],cdata:[{token:"text",regex:"\\]\\]>",next:"start"},{token:"text",regex:"\\s+"},{token:"text",regex:"(?:[^\\]]|\\](?!\\]>))+"}],comment:[{token:"comment",regex:".*?-->",next:"start"},{token:"comment",regex:".*:\\)",next:"start"},{token:"comment",regex:".+"}]}};d.inherits(g,f),b.XQueryHighlightRules=g}),define("ace/mode/behaviour/xquery",["require","exports","module","ace/lib/oop","ace/mode/behaviour","ace/mode/behaviour/cstyle"],function(a,b,c){"use strict";var d=a("../../lib/oop"),e=a("../behaviour").Behaviour,f=a("./cstyle").CstyleBehaviour,g=function(a){this.inherit(f,["braces","parens","string_dquotes"]),this.parent=a,this.add("brackets","insertion",function(a,b,c,d,e){if(e=="\n"){var f=c.getCursorPosition(),g=d.doc.getLine(f.row),h=g.substring(f.column,f.column+2);if(h=="</"){var i=this.$getIndent(d.doc.getLine(f.row))+d.getTabString(),j=this.$getIndent(d.doc.getLine(f.row));return{text:"\n"+i+"\n"+j,selection:[1,i.length,1,i.length]}}}return!1}),this.add("slash","insertion",function(b,c,d,e,f){if(f=="/"){var g=d.getCursorPosition(),h=e.doc.getLine(g.row);if(g.column>0&&h.charAt(g.column-1)=="<"){h=h.substring(0,g.column)+"/"+h.substring(g.column);var i=e.doc.getAllLines();i[g.row]=h,a.exec("closeTag",i.join(e.doc.getNewLineCharacter()),g.row)}}return!1})};d.inherits(g,e),b.XQueryBehaviour=g}),define("ace/mode/behaviour/cstyle",["require","exports","module","ace/lib/oop","ace/mode/behaviour"],function(a,b,c){"use strict";var d=a("../../lib/oop"),e=a("../behaviour").Behaviour,f=function(){this.add("braces","insertion",function(a,b,c,d,e){if(e=="{"){var f=c.getSelectionRange(),g=d.doc.getTextRange(f);return g!==""?{text:"{"+g+"}",selection:!1}:{text:"{}",selection:[1,1]}}if(e=="}"){var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column,h.column+1);if(j=="}"){var k=d.$findOpeningBracket("}",{column:h.column+1,row:h.row});if(k!==null)return{text:"",selection:[1,1]}}}else if(e=="\n"){var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column,h.column+1);if(j=="}"){var l=d.findMatchingBracket({row:h.row,column:h.column+1});if(!l)return null;var m=this.getNextLineIndent(a,i.substring(0,i.length-1),d.getTabString()),n=this.$getIndent(d.doc.getLine(l.row));return{text:"\n"+m+"\n"+n,selection:[1,m.length,1,m.length]}}}}),this.add("braces","deletion",function(a,b,c,d,e){var f=d.doc.getTextRange(e);if(!e.isMultiLine()&&f=="{"){var g=d.doc.getLine(e.start.row),h=g.substring(e.end.column,e.end.column+1);if(h=="}")return e.end.column++,e}}),this.add("parens","insertion",function(a,b,c,d,e){if(e=="("){var f=c.getSelectionRange(),g=d.doc.getTextRange(f);return g!==""?{text:"("+g+")",selection:!1}:{text:"()",selection:[1,1]}}if(e==")"){var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column,h.column+1);if(j==")"){var k=d.$findOpeningBracket(")",{column:h.column+1,row:h.row});if(k!==null)return{text:"",selection:[1,1]}}}}),this.add("parens","deletion",function(a,b,c,d,e){var f=d.doc.getTextRange(e);if(!e.isMultiLine()&&f=="("){var g=d.doc.getLine(e.start.row),h=g.substring(e.start.column+1,e.start.column+2);if(h==")")return e.end.column++,e}}),this.add("string_dquotes","insertion",function(a,b,c,d,e){if(e=='"'){var f=c.getSelectionRange(),g=d.doc.getTextRange(f);if(g!=="")return{text:'"'+g+'"',selection:!1};var h=c.getCursorPosition(),i=d.doc.getLine(h.row),j=i.substring(h.column-1,h.column);if(j=="\\")return null;var k=d.getTokens(f.start.row,f.start.row)[0].tokens,l=0,m,n=-1;for(var o=0;o<k.length;o++){m=k[o],m.type=="string"?n=-1:n<0&&(n=m.value.indexOf('"'));if(m.value.length+l>f.start.column)break;l+=k[o].value.length}if(!m||n<0&&m.type!=="comment"&&(m.type!=="string"||f.start.column!==m.value.length+l-1&&m.value.lastIndexOf('"')===m.value.length-1))return{text:'""',selection:[1,1]};if(m&&m.type==="string"){var p=i.substring(h.column,h.column+1);if(p=='"')return{text:"",selection:[1,1]}}}}),this.add("string_dquotes","deletion",function(a,b,c,d,e){var f=d.doc.getTextRange(e);if(!e.isMultiLine()&&f=='"'){var g=d.doc.getLine(e.start.row),h=g.substring(e.start.column+1,e.start.column+2);if(h=='"')return e.end.column++,e}})};d.inherits(f,e),b.CstyleBehaviour=f})
\ No newline at end of file
diff --git a/lib/ace/mode/xquery.js b/lib/ace/mode/xquery.js
index afcc690e..2ffc57cf 100644
--- a/lib/ace/mode/xquery.js
+++ b/lib/ace/mode/xquery.js
@@ -118,6 +118,7 @@ oop.inherits(Mode, TextMode);
     
     this.createWorker = function(session) {
         var worker = new WorkerClient(["ace"], "worker-xquery.js", "ace/mode/xquery_worker", "XQueryWorker");
+        var self = this;
         worker.attachToDocument(session.getDocument());
         
         worker.on("error", function(e) {
@@ -129,7 +130,7 @@ oop.inherits(Mode, TextMode);
         });
         
         worker.on("highlight", function(tokens) {
-          session.getMode().$tokenizer.cache = tokens.data;
+          self.$tokenizer.cache = tokens.data;
         });
         return worker;
     };