Bug 1067576 - Make console.log work in frame scripts (r=Mossop)

2014-10-07 11:46:25 -07:00
parent 2b10dbf23d
commit c878081fc9
8 changed files with 144 additions and 2 deletions
--- a/toolkit/components/processsingleton/ContentProcessSingleton.js
+++ b/toolkit/components/processsingleton/ContentProcessSingleton.js
@@ -0,0 +1,64 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const Cu = Components.utils;
+const Ci = Components.interfaces;
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+
+XPCOMUtils.defineLazyServiceGetter(this, "cpmm",
+                                   "@mozilla.org/childprocessmessagemanager;1",
+                                   "nsIMessageSender");
+
+function ContentProcessSingleton() {}
+ContentProcessSingleton.prototype = {
+  classID: Components.ID("{ca2a8470-45c7-11e4-916c-0800200c9a66}"),
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
+                                         Ci.nsISupportsWeakReference]),
+
+  observe: function(subject, topic, data) {
+    switch (topic) {
+    case "app-startup": {
+      Services.obs.addObserver(this, "console-api-log-event", false);
+      Services.obs.addObserver(this, "xpcom-shutdown", false);
+      break;
+    }
+    case "console-api-log-event": {
+      let consoleMsg = subject.wrappedJSObject;
+
+      let msgData = {
+        level: consoleMsg.level,
+        filename: consoleMsg.filename,
+        lineNumber: consoleMsg.lineNumber,
+        functionName: consoleMsg.functionName,
+        timeStamp: consoleMsg.timeStamp,
+        arguments: [],
+      };
+
+      // We can't send objects over the message manager, so we sanitize
+      // them out.
+      for (let arg of consoleMsg.arguments) {
+        if ((typeof arg == "object" || typeof arg == "function") && arg !== null) {
+          msgData.arguments.push("<unavailable>");
+        } else {
+          msgData.arguments.push(arg);
+        }
+      }
+
+      cpmm.sendAsyncMessage("Console:Log", msgData);
+      break;
+    }
+
+    case "xpcom-shutdown":
+      Services.obs.removeObserver(this, "console-api-log-event");
+      Services.obs.removeObserver(this, "xpcom-shutdown");
+      break;
+    }
+  },
+};
+
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory([ContentProcessSingleton]);