DevTools: linkify relative links in console.log(new Error().stack)

Source/devtools/front_end/console/ConsoleViewMessage.js

Index: Source/devtools/front_end/console/ConsoleViewMessage.js
diff --git a/Source/devtools/front_end/console/ConsoleViewMessage.js b/Source/devtools/front_end/console/ConsoleViewMessage.js
index 2d88c73e68ef891d651f7e396b49ff3327815f3f..4617e192ce59a5ebf434952bd9b4a93bf656bd48 100644
--- a/Source/devtools/front_end/console/ConsoleViewMessage.js
+++ b/Source/devtools/front_end/console/ConsoleViewMessage.js
@@ -166,8 +166,11 @@ WebInspector.ConsoleViewMessage.prototype = {
                         this._messageElement = this._format([consoleMessage.messageText]);
                         break;
                     default:
+                        if (consoleMessage.parameters && consoleMessage.parameters.length === 1 && consoleMessage.parameters[0].type === "string")
+                             this._messageElement = this._tryFormatAsError(/**@type {string} */(consoleMessage.parameters[0].value));
+
                         var args = consoleMessage.parameters || [consoleMessage.messageText];
-                        this._messageElement = this._format(args);
+                        this._messageElement = this._messageElement || this._format(args);
                 }
             } else if (consoleMessage.source === WebInspector.ConsoleMessage.MessageSource.Network) {
                 if (consoleMessage.request) {
@@ -282,9 +285,6 @@ WebInspector.ConsoleViewMessage.prototype = {
     _linkifyCallFrame: function(callFrame)
     {
         var target = this._target();
-        if (!this._linkifier)
-            return null;
-
         return this._linkifier.linkifyConsoleCallFrame(target, callFrame, "console-message-url");
     },
 
@@ -1272,6 +1272,73 @@ WebInspector.ConsoleViewMessage.prototype = {
     {
         return this._message.messageText;
     },
+
+    /**
+     * @param {string} string
+     * @return {?Element}
+     */
+    _tryFormatAsError: function(string)
+    {
+        var errorPrefixes = ["EvalError", "ReferenceError", "SyntaxError", "TypeError", "RangeError", "Error", "URIError"];
+        if (!errorPrefixes.some(String.prototype.startsWith.bind(new String(string))))
+            return null;
+
+        var lines = string.split("\n");
+        var links = [];
+        var position = 0;
+        for (var i = 0; i < lines.length; ++i) {
+            position += i > 0 ? lines[i - 1].length + 1 : 0;
+            var isCallFrameLine = /^\s*at\s/.test(lines[i]);
+            if (!isCallFrameLine && links.length)
+                return null;
+
+            if (!isCallFrameLine)
+                continue;
+
+            var openBracketIndex = lines[i].indexOf("(");
+            var closeBracketIndex = lines[i].indexOf(")");
+            var hasOpenBracket = openBracketIndex !== -1;
+            var hasCloseBracket = closeBracketIndex !== -1;
+
+            if ((openBracketIndex > closeBracketIndex) ||  (hasOpenBracket ^ hasCloseBracket))
+                return null;
+
+            var left = hasOpenBracket ? openBracketIndex + 1 : lines[i].indexOf("at") + 3;
+            var right = hasOpenBracket ? closeBracketIndex : lines[i].length;
+            var linkCandidate = lines[i].substring(left, right);
+            var splitResult = WebInspector.ParsedURL.splitLineAndColumn(linkCandidate);
+            if (!splitResult)
+                return null;
+
+            var parsed = splitResult.url.asParsedURL();
+            if (!parsed) {
+                var baseUrl = this._target() ? this._target().url() : WebInspector.targetManager.inspectedPageURL();
+                var completeURL = WebInspector.ParsedURL.completeURL(baseUrl, splitResult.url);
+                parsed = completeURL ? completeURL.asParsedURL() : null;
+            }
+
+            if (!parsed)
+                return null;
+
+            links.push({url: parsed.url, positionLeft: position + left, positionRight: position + right, lineNumber: splitResult.lineNumber, columnNumber: splitResult.columnNumber});
+        }
+
+        if (!links.length)
+            return null;
+
+        var formattedResult = createElement("span");
+        var start = 0;
+        for (var i = 0; i < links.length; ++i) {
+            formattedResult.appendChild(this._linkifier.linkifyStringAsFragment(this._target(), string.substring(start, links[i].positionLeft)));
+            formattedResult.appendChild(this._linkifier.linkifyScriptLocation(this._target(), null, links[i].url, links[i].lineNumber, links[i].columnNumber));
+            start = links[i].positionRight;
+        }
+
+        if (start != string.length)
+            formattedResult.appendChild(this._linkifier.linkifyStringAsFragment(this._target(), string.substring(start)));
+
+        return formattedResult;
+    }
 }
 
 /**