1 files changed, 93 insertions, 0 deletions
diff --git a/remote/domains/content/Log.jsm b/remote/domains/content/Log.jsm
new file mode 100644
index 0000000000..316f1adfeb
--- /dev/null
+++ b/remote/domains/content/Log.jsm
@@ -0,0 +1,93 @@
+/* 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";
+
+var EXPORTED_SYMBOLS = ["Log"];
+
+const { ContentProcessDomain } = ChromeUtils.import(
+  "chrome://remote/content/domains/ContentProcessDomain.jsm"
+);
+const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
+
+const CONSOLE_MESSAGE_LEVEL_MAP = {
+  [Ci.nsIConsoleMessage.debug]: "verbose",
+  [Ci.nsIConsoleMessage.info]: "info",
+  [Ci.nsIConsoleMessage.warn]: "warning",
+  [Ci.nsIConsoleMessage.error]: "error",
+};
+
+class Log extends ContentProcessDomain {
+  constructor(session) {
+    super(session);
+    this.enabled = false;
+  }
+
+  destructor() {
+    this.disable();
+
+    super.destructor();
+  }
+
+  enable() {
+    if (!this.enabled) {
+      this.enabled = true;
+
+      Services.console.registerListener(this);
+    }
+  }
+
+  disable() {
+    if (this.enabled) {
+      this.enabled = false;
+
+      Services.console.unregisterListener(this);
+    }
+  }
+
+  _getLogCategory(category) {
+    if (category.startsWith("CORS")) {
+      return "network";
+    } else if (category.includes("javascript")) {
+      return "javascript";
+    }
+
+    return "other";
+  }
+
+  // nsIObserver
+
+  /**
+   * Takes all script error messages that do not have an exception attached,
+   * and emits a "Log.entryAdded" event.
+   *
+   * @param {nsIConsoleMessage} message
+   *     Message originating from the nsIConsoleService.
+   */
+  observe(message) {
+    if (message instanceof Ci.nsIScriptError && !message.hasException) {
+      let url;
+      if (message.sourceName !== "debugger eval code") {
+        url = message.sourceName;
+      }
+
+      const entry = {
+        source: this._getLogCategory(message.category),
+        level: CONSOLE_MESSAGE_LEVEL_MAP[message.logLevel],
+        text: message.errorMessage,
+        timestamp: message.timeStamp,
+        url,
+        lineNumber: message.lineNumber,
+      };
+
+      this.emit("Log.entryAdded", { entry });
+    }
+  }
+
+  // XPCOM
+
+  get QueryInterface() {
+    return ChromeUtils.generateQI(["nsIConsoleListener"]);
+  }
+}