1 files changed, 76 insertions, 0 deletions
diff --git a/components/downloads/DownloadsLogger.jsm b/components/downloads/DownloadsLogger.jsm
new file mode 100644
index 0000000..1218539
--- /dev/null
+++ b/components/downloads/DownloadsLogger.jsm
@@ -0,0 +1,76 @@
+/* -*- Mode: js2; js2-basic-offset: 2; indent-tabs-mode: nil; -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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/. */
+
+/**
+ * The contents of this file were copied almost entirely from
+ * toolkit/identity/LogUtils.jsm. Until we've got a more generalized logging
+ * mechanism for toolkit, I think this is going to be how we roll.
+ */
+
+"use strict";
+
+this.EXPORTED_SYMBOLS = ["DownloadsLogger"];
+const PREF_DEBUG = "browser.download.debug";
+
+const Cu = Components.utils;
+const Ci = Components.interfaces;
+const Cc = Components.classes;
+const Cr = Components.results;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+
+this.DownloadsLogger = {
+  _generateLogMessage: function _generateLogMessage(args) {
+    // create a string representation of a list of arbitrary things
+    let strings = [];
+
+    for (let arg of args) {
+      if (typeof arg === 'string') {
+        strings.push(arg);
+      } else if (arg === undefined) {
+        strings.push('undefined');
+      } else if (arg === null) {
+        strings.push('null');
+      } else {
+        try {
+          strings.push(JSON.stringify(arg, null, 2));
+        } catch(err) {
+          strings.push("<<something>>");
+        }
+      }
+    };
+    return 'Downloads: ' + strings.join(' ');
+  },
+
+  /**
+   * log() - utility function to print a list of arbitrary things
+   *
+   * Enable with about:config pref browser.download.debug
+   */
+  log: function DL_log(...args) {
+    let output = this._generateLogMessage(args);
+    dump(output + "\n");
+
+    // Additionally, make the output visible in the Error Console
+    Services.console.logStringMessage(output);
+  },
+
+  /**
+   * reportError() - report an error through component utils as well as
+   * our log function
+   */
+  reportError: function DL_reportError(...aArgs) {
+    // Report the error in the browser
+    let output = this._generateLogMessage(aArgs);
+    Cu.reportError(output);
+    dump("ERROR:" + output + "\n");
+    for (let frame = Components.stack.caller; frame; frame = frame.caller) {
+      dump("\t" + frame + "\n");
+    }
+  }
+
+};