// Domain Public by Eric Wendelin http://eriwen.com/ (2008)
//                  Luke Smith http://lucassmith.name/ (2008)
//                  Loic Dachary <loic@dachary.org> (2008)
//                  Johan Euphrosine <proppy@aminche.com> (2008)
//                  Oyvind Sean Kinsey http://kinsey.no/blog (2010)
//                  Victor Homyakov <victor-homyakov@users.sourceforge.net> (2010)

/**
 * Main function giving a function stack trace with a forced or passed in Error
 *
 * @cfg {Error} e The error to create a stacktrace from (optional)
 * @cfg {Boolean} guess If we should try to resolve the names of anonymous functions
 * @return {Array} of Strings with functions, lines, files, and arguments where possible
 */
function printStackTrace(options) {
   options = options || { guess: true };
   var ex = options.e || null, guess = !!options.guess;
   var p = new printStackTrace.implementation(), result = p.run(ex);
   return (guess) ? p.guessAnonymousFunctions(result) : result;
}

printStackTrace.implementation = function () {
};

printStackTrace.implementation.prototype = {
   /**
    * @param {Error} ex The error to create a stacktrace from (optional)
    * @param {String} mode Forced mode (optional, mostly for unit tests)
    */
   run: function (ex, mode) {
      ex = ex || this.createException();
      // examine exception properties w/o debugger
      //for (var prop in ex) {alert("Ex['" + prop + "']=" + ex[prop]);}
      mode = mode || this.mode(ex);
      if (mode === 'other') {
         return this.other(arguments.callee);
      } else {
         return this[mode](ex);
      }
   },

   createException: function () {
      try {
         this.undef();
      } catch (e) {
         return e;
      }
   },

   /**
    * Mode could differ for different exception, e.g.
    * exceptions in Chrome may or may not have arguments or stack.
    *
    * @return {String} mode of operation for the exception
    */
   mode: function (e) {
      if (e['arguments'] && e.stack) {
         return 'chrome';
      } else if (e.stack && e.sourceURL) {
         return 'safari';
      } else if (typeof e.message === 'string' && typeof window !== 'undefined' && window.opera) {
         // e.message.indexOf("Backtrace:") > -1 -> opera
         // !e.stacktrace -> opera
         if (!e.stacktrace) {
            return 'opera9'; // use e.message
         }
         // 'opera#sourceloc' in e -> opera9, opera10a
         if (e.message.indexOf('\n') > -1 && e.message.split('\n').length > e.stacktrace.split('\n').length) {
            return 'opera9'; // use e.message
         }
         // e.stacktrace && !e.stack -> opera10a
         if (!e.stack) {
            return 'opera10a'; // use e.stacktrace
         }
         // e.stacktrace && e.stack -> opera10b
         if (e.stacktrace.indexOf("called from line") < 0) {
            return 'opera10b'; // use e.stacktrace, format differs from 'opera10a'
         }
         // e.stacktrace && e.stack -> opera11
         return 'opera11'; // use e.stacktrace, format differs from 'opera10a', 'opera10b'
      } else if (e.stack) {
         return 'firefox';
      }
      return 'other';
   },

   /**
    * Given a context, function name, and callback function, overwrite it so that it calls
    * printStackTrace() first with a callback and then runs the rest of the body.
    *
    * @param {Object} context of execution (e.g. window)
    * @param {String} functionName to instrument
    * @param {Function} function to call with a stack trace on invocation
    */
   instrumentFunction: function (context, functionName, callback) {
      context = context || window;
      var original = context[functionName];
      context[functionName] = function instrumented() {
         callback.call(this, printStackTrace().slice(4));
         return context[functionName]._instrumented.apply(this, arguments);
      };
      context[functionName]._instrumented = original;
   },

   /**
    * Given a context and function name of a function that has been
    * instrumented, revert the function to it's original (non-instrumented)
    * state.
    *
    * @param {Object} context of execution (e.g. window)
    * @param {String} functionName to de-instrument
    */
   deinstrumentFunction: function (context, functionName) {
      if (context[functionName].constructor === Function &&
              context[functionName]._instrumented &&
              context[functionName]._instrumented.constructor === Function) {
         context[functionName] = context[functionName]._instrumented;
      }
   },

   /**
    * Given an Error object, return a formatted Array based on Chrome's stack string.
    *
    * @param e - Error object to inspect
    * @return Array<String> of function calls, files and line numbers
    */
   chrome: function (e) {
      var stack = (e.stack + '\n').replace(/^\S[^\(]+?[\n$]/gm, '').
        replace(/^\s+(at eval )?at\s+/gm, '').
        replace(/^([^\(]+?)([\n$])/gm, '{anonymous}()@$1$2').
        replace(/^Object.<anonymous>\s*\(([^\)]+)\)/gm, '{anonymous}()@$1').split('\n');
      stack.pop();
      return stack;
   },

   /**
    * Given an Error object, return a formatted Array based on Safari's stack string.
    *
    * @param e - Error object to inspect
    * @return Array<String> of function calls, files and line numbers
    */
   safari: function (e) {
      return e.stack.replace(/\[native code\]\n/m, '').replace(/^@/gm, '{anonymous}()@').split('\n');
   },

   /**
    * Given an Error object, return a formatted Array based on Firefox's stack string.
    *
    * @param e - Error object to inspect
    * @return Array<String> of function calls, files and line numbers
    */
   firefox: function (e) {
      return e.stack.replace(/(?:\n@:0)?\s+$/m, '').replace(/^[\(@]/gm, '{anonymous}()@').split('\n');
   },

   opera11: function (e) {
      var ANON = '{anonymous}', lineRE = /^.*line (\d+), column (\d+)(?: in (.+))? in (\S+):$/;
      var lines = e.stacktrace.split('\n'), result = [];

      for (var i = 0, len = lines.length; i < len; i += 2) {
         var match = lineRE.exec(lines[i]);
         if (match) {
            var location = match[4] + ':' + match[1] + ':' + match[2];
            var fnName = match[3] || "global code";
            fnName = fnName.replace(/<anonymous function: (\S+)>/, "$1").replace(/<anonymous function>/, ANON);
            result.push(fnName + '@' + location + ' -- ' + lines[i + 1].replace(/^\s+/, ''));
         }
      }

      return result;
   },

   opera10b: function (e) {
      // "<anonymous function: run>([arguments not available])@file://localhost/G:/js/stacktrace.js:27\n" +
      // "printStackTrace([arguments not available])@file://localhost/G:/js/stacktrace.js:18\n" +
      // "@file://localhost/G:/js/test/functional/testcase1.html:15"
      var lineRE = /^(.*)@(.+):(\d+)$/;
      var lines = e.stacktrace.split('\n'), result = [];

      for (var i = 0, len = lines.length; i < len; i++) {
         var match = lineRE.exec(lines[i]);
         if (match) {
            var fnName = match[1] ? (match[1] + '()') : "global code";
            result.push(fnName + '@' + match[2] + ':' + match[3]);
         }
      }

      return result;
   },

   /**
    * Given an Error object, return a formatted Array based on Opera 10's stacktrace string.
    *
    * @param e - Error object to inspect
    * @return Array<String> of function calls, files and line numbers
    */
   opera10a: function (e) {
      // "  Line 27 of linked script file://localhost/G:/js/stacktrace.js\n"
      // "  Line 11 of inline#1 script in file://localhost/G:/js/test/functional/testcase1.html: In function foo\n"
      var ANON = '{anonymous}', lineRE = /Line (\d+).*script (?:in )?(\S+)(?:: In function (\S+))?$/i;
      var lines = e.stacktrace.split('\n'), result = [];

      for (var i = 0, len = lines.length; i < len; i += 2) {
         var match = lineRE.exec(lines[i]);
         if (match) {
            var fnName = match[3] || ANON;
            result.push(fnName + '()@' + match[2] + ':' + match[1] + ' -- ' + lines[i + 1].replace(/^\s+/, ''));
         }
      }

      return result;
   },

   // Opera 7.x-9.2x only!
   opera9: function (e) {
      // "  Line 43 of linked script file://localhost/G:/js/stacktrace.js\n"
      // "  Line 7 of inline#1 script in file://localhost/G:/js/test/functional/testcase1.html\n"
      var ANON = '{anonymous}', lineRE = /Line (\d+).*script (?:in )?(\S+)/i;
      var lines = e.message.split('\n'), result = [];

      for (var i = 2, len = lines.length; i < len; i += 2) {
         var match = lineRE.exec(lines[i]);
         if (match) {
            result.push(ANON + '()@' + match[2] + ':' + match[1] + ' -- ' + lines[i + 1].replace(/^\s+/, ''));
         }
      }

      return result;
   },

   // Safari 5-, IE 9-, and others
   other: function (curr) {
      var ANON = '{anonymous}', fnRE = /function\s*([\w\-$]+)?\s*\(/i, stack = [], fn, args, maxStackSize = 10;
      while (curr && curr['arguments'] && stack.length < maxStackSize) {
         fn = fnRE.test(curr.toString()) ? RegExp.$1 || ANON : ANON;
         args = Array.prototype.slice.call(curr['arguments'] || []);
         stack[stack.length] = fn + '(' + this.stringifyArguments(args) + ')';
         curr = curr.caller;
      }
      return stack;
   },

   /**
    * Given arguments array as a String, subsituting type names for non-string types.
    *
    * @param {Arguments} args
    * @return {Array} of Strings with stringified arguments
    */
   stringifyArguments: function (args) {
      var result = [];
      var slice = Array.prototype.slice;
      for (var i = 0; i < args.length; ++i) {
         var arg = args[i];
         if (arg === undefined) {
            result[i] = 'undefined';
         } else if (arg === null) {
            result[i] = 'null';
         } else if (arg.constructor) {
            if (arg.constructor === Array) {
               if (arg.length < 3) {
                  result[i] = '[' + this.stringifyArguments(arg) + ']';
               } else {
                  result[i] = '[' + this.stringifyArguments(slice.call(arg, 0, 1)) + '...' + this.stringifyArguments(slice.call(arg, -1)) + ']';
               }
            } else if (arg.constructor === Object) {
               result[i] = '#object';
            } else if (arg.constructor === Function) {
               result[i] = '#function';
            } else if (arg.constructor === String) {
               result[i] = '"' + arg + '"';
            } else if (arg.constructor === Number) {
               result[i] = arg;
            }
         }
      }
      return result.join(',');
   },

   sourceCache: {},

   /**
    * @return the text from a given URL
    */
   ajax: function (url) {
      var req = this.createXMLHTTPObject();
      if (req) {
         try {
            req.open('GET', url, false);
            //req.overrideMimeType('text/plain');
            //req.overrideMimeType('text/javascript');
            req.send(null);
            //return req.status == 200 ? req.responseText : '';
            return req.responseText;
         } catch (e) {
         }
      }
      return '';
   },

   /**
    * Try XHR methods in order and store XHR factory.
    *
    * @return <Function> XHR function or equivalent
    */
   createXMLHTTPObject: function () {
      var xmlhttp, XMLHttpFactories = [
          function () {
             return new XMLHttpRequest();
          }, function () {
             return new ActiveXObject('Msxml2.XMLHTTP');
          }, function () {
             return new ActiveXObject('Msxml3.XMLHTTP');
          }, function () {
             return new ActiveXObject('Microsoft.XMLHTTP');
          }
      ];
      for (var i = 0; i < XMLHttpFactories.length; i++) {
         try {
            xmlhttp = XMLHttpFactories[i]();
            // Use memoization to cache the factory
            this.createXMLHTTPObject = XMLHttpFactories[i];
            return xmlhttp;
         } catch (e) {
         }
      }
   },

   /**
    * Given a URL, check if it is in the same domain (so we can get the source
    * via Ajax).
    *
    * @param url <String> source url
    * @return False if we need a cross-domain request
    */
   isSameDomain: function (url) {
      return typeof location !== "undefined" && url.indexOf(location.hostname) !== -1; // location may not be defined, e.g. when running from nodejs.
   },

   /**
    * Get source code from given URL if in the same domain.
    *
    * @param url <String> JS source URL
    * @return <Array> Array of source code lines
    */
   getSource: function (url) {
      // TODO reuse source from script tags?
      if (!(url in this.sourceCache)) {
         this.sourceCache[url] = this.ajax(url).split('\n');
      }
      return this.sourceCache[url];
   },

   guessAnonymousFunctions: function (stack) {
      for (var i = 0; i < stack.length; ++i) {
         var reStack = /\{anonymous\}\(.*\)@(.*)/,
             reRef = /^(.*?)(?::(\d+))(?::(\d+))?(?: -- .+)?$/,
             frame = stack[i], ref = reStack.exec(frame);

         if (ref) {
            var m = reRef.exec(ref[1]);
            if (m) { // If falsey, we did not get any file/line information
               var file = m[1], lineno = m[2], charno = m[3] || 0;
               if (file && this.isSameDomain(file) && lineno) {
                  var functionName = this.guessAnonymousFunction(file, lineno, charno);
                  stack[i] = frame.replace('{anonymous}', functionName);
               }
            }
         }
      }
      return stack;
   },

   guessAnonymousFunction: function (url, lineNo, charNo) {
      var ret;
      try {
         ret = this.findFunctionName(this.getSource(url), lineNo);
      } catch (e) {
         ret = 'getSource failed with url: ' + url + ', exception: ' + e.toString();
      }
      return ret;
   },

   findFunctionName: function (source, lineNo) {
      // FIXME findFunctionName fails for compressed source
      // (more than one function on the same line)
      // TODO use captured args
      // function {name}({args}) m[1]=name m[2]=args
      var reFunctionDeclaration = /function\s+([^(]*?)\s*\(([^)]*)\)/;
      // {name} = function ({args}) TODO args capture
      // /['"]?([0-9A-Za-z_]+)['"]?\s*[:=]\s*function(?:[^(]*)/
      var reFunctionExpression = /['"]?([0-9A-Za-z_]+)['"]?\s*[:=]\s*function\b/;
      // {name} = eval()
      var reFunctionEvaluation = /['"]?([0-9A-Za-z_]+)['"]?\s*[:=]\s*(?:eval|new Function)\b/;
      // Walk backwards in the source lines until we find
      // the line which matches one of the patterns above
      var code = "", line, maxLines = Math.min(lineNo, 20), m, commentPos;
      for (var i = 0; i < maxLines; ++i) {
         // lineNo is 1-based, source[] is 0-based
         line = source[lineNo - i - 1];
         commentPos = line.indexOf('//');
         if (commentPos >= 0) {
            line = line.substr(0, commentPos);
         }
         // TODO check other types of comments? Commented code may lead to false positive
         if (line) {
            code = line + code;
            m = reFunctionExpression.exec(code);
            if (m && m[1]) {
               return m[1];
            }
            m = reFunctionDeclaration.exec(code);
            if (m && m[1]) {
               //return m[1] + "(" + (m[2] || "") + ")";
               return m[1];
            }
            m = reFunctionEvaluation.exec(code);
            if (m && m[1]) {
               return m[1];
            }
         }
      }
      return '(?)';
   }
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_getPageUrl(href){var uri,query,result;href=href||State.Get("href");if(href===undefined){if(window.location.hash&&window.location.hash.length>1){href=ABL.GetSignificantPath(window.location.hash.substr(1))}else{href=ABL.GetSignificantPath(window.location.href)}}else if(href){uri=URI.asURI(href);href=uri.toString(false,false,false,true,true)}if(href.substr(0,1)=="/"){var match=/.*~\//.exec(href);if(match){href=href.substr(match[0].length)}}else{if(href.substr(0,2)=="~/"){href=href.substr(2)}var winloc=URI.asURI(ABL.GetSignificantPath(window.location.href));href=winloc.toString(false,false,false,true,true)+href}query=State.ExposedUrlString();if(query){result=href+"?"+query}else{result=href}State.Set("href",result);return result};function _getPageTitle(){var page=State.Get('page');return State.Settings.Get('sitetitle')};var _jqXHR={};function _request(historyState,cached,httpMethod){cached=typeof cached=='undefined'?true:cached;var 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url!='string'||url==''){ABL.LogError('History Store Get, url is not a string or empty:'+url);return}return $.jStorage.get(url,{})}},NormalizeUrl:function(url){if(!Modernizr.history){var appPath=State.Settings.Get('applicationpath');if(url.substr(0,appPath.length)===appPath){url=url.substr(appPath.length)}}return url}},Request:function(){ABL.PushState(State.AsObject(true),_getPageTitle(),_getPageUrl())},SetHistoryState:function(){var title,url,state,entry;title=_getPageTitle();url=ABL.History.NormalizeUrl(_getPageUrl());state=State.AsObject(true);ABL.LogInfo('setHistoryState',state);if(Modernizr.history){entry=history.state;entry={id:!entry?stateId:entry.id,state:state};stateId=entry.id;history.replaceState(entry,title,url)}else{entry=ABL.History.Store.Get(url);entry={id:!entry?stateId:entry.id,state:state,ignoreHashChange:true};stateId=entry.id;var hash=ABL.History.Store.Replace(url,entry);if(typeof hash!='undefined'){ABL.LogInfo('Setting location.hash from "SetHistoryState" - 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