--- /dev/null
+// 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 (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\s+/gm, '').
+ replace(/^([^\(]+?)([\n$])/gm, '{anonymous}()@$1$2').
+ replace(/^Object.<anonymous>\s*\(([^\)]+)\)/gm, '{anonymous}()@$1').split('\n');
+ stack.pop();
+ return stack;
+ },
+
+ /**
+ * Given an Error object, return a formatted Array based on Firefox's stack string.
+ *
+ * @param e - Error object to inspect
+ * @return Array<String> of function calls, files and line numbers
+ */
+ firefox: function(e) {
+ return e.stack.replace(/(?:\n@:0)?\s+$/m, '').replace(/^\(/gm, '{anonymous}(').split('\n');
+ },
+
+ opera11: function(e) {
+ // "Error thrown at line 42, column 12 in <anonymous function>() in file://localhost/G:/js/stacktrace.js:\n"
+ // "Error thrown at line 42, column 12 in <anonymous function: createException>() in file://localhost/G:/js/stacktrace.js:\n"
+ // "called from line 7, column 4 in bar(n) in file://localhost/G:/js/test/functional/testcase1.html:\n"
+ // "called from line 15, column 3 in file://localhost/G:/js/test/functional/testcase1.html:\n"
+ 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+)>/, "$1").replace(/<anonymous function>/, ANON);
+ result.push(fnName + '@' + location + ' -- ' + lines[i + 1].replace(/^\s+/, ''));
+ }
+ }
+
+ return result;
+ },
+
+ opera10b: function(e) {
+ // "<anonymous function: run>([arguments not available])@file://localhost/G:/js/stacktrace.js:27\n" +
+ // "printStackTrace([arguments not available])@file://localhost/G:/js/stacktrace.js:18\n" +
+ // "@file://localhost/G:/js/test/functional/testcase1.html:15"
+ var ANON = '{anonymous}', lineRE = /^(.*)@(.+):(\d+)$/;
+ 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+))?$/i;
+ var lines = e.stacktrace.split('\n'), result = [];
+
+ for (var i = 0, len = lines.length; i < len; i += 2) {
+ var match = lineRE.exec(lines[i]);
+ if (match) {
+ var fnName = match[3] || ANON;
+ result.push(fnName + '()@' + match[2] + ':' + match[1] + ' -- ' + lines[i + 1].replace(/^\s+/, ''));
+ }
+ }
+
+ return result;
+ },
+
+ // Opera 7.x-9.2x only!
+ opera9: function(e) {
+ // " Line 43 of linked script file://localhost/G:/js/stacktrace.js\n"
+ // " Line 7 of inline#1 script in file://localhost/G:/js/test/functional/testcase1.html\n"
+ var ANON = '{anonymous}', lineRE = /Line (\d+).*script (?:in )?(\S+)/i;
+ var lines = e.message.split('\n'), result = [];
+
+ for (var i = 2, len = lines.length; i < len; i += 2) {
+ var match = lineRE.exec(lines[i]);
+ if (match) {
+ result.push(ANON + '()@' + match[2] + ':' + match[1] + ' -- ' + lines[i + 1].replace(/^\s+/, ''));
+ }
+ }
+
+ return result;
+ },
+
+ // Safari, IE, and others
+ other: function(curr) {
+ var ANON = '{anonymous}', fnRE = /function\s*([\w\-$]+)?\s*\(/i, stack = [], fn, args, maxStackSize = 10;
+ while (curr && 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} object
+ * @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.send(null);
+ 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 url.indexOf(location.hostname) !== -1;
+ },
+
+ /**
+ * 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]), 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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