1 files changed, 59 insertions, 0 deletions
diff --git a/devtools/shared/commands/resource/legacy-listeners/console-messages.js b/devtools/shared/commands/resource/legacy-listeners/console-messages.js
new file mode 100644
index 0000000000..ae3f81b4df
--- /dev/null
+++ b/devtools/shared/commands/resource/legacy-listeners/console-messages.js
@@ -0,0 +1,59 @@
+/* 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 ResourceCommand = require("resource://devtools/shared/commands/resource/resource-command.js");
+
+module.exports = async function ({ targetCommand, targetFront, onAvailable }) {
+  // Allow the top level target unconditionnally.
+  // Also allow frame, but only in content toolbox, i.e. still ignore them in
+  // the context of the browser toolbox as we inspect messages via the process
+  // targets
+  const listenForFrames = targetCommand.descriptorFront.isTabDescriptor;
+
+  // Allow workers when messages aren't dispatched to the main thread.
+  const listenForWorkers =
+    !targetCommand.rootFront.traits
+      .workerConsoleApiMessagesDispatchedToMainThread;
+
+  const acceptTarget =
+    targetFront.isTopLevel ||
+    targetFront.targetType === targetCommand.TYPES.PROCESS ||
+    (targetFront.targetType === targetCommand.TYPES.FRAME && listenForFrames) ||
+    (targetFront.targetType === targetCommand.TYPES.WORKER && listenForWorkers);
+
+  if (!acceptTarget) {
+    return;
+  }
+
+  const webConsoleFront = await targetFront.getFront("console");
+  if (webConsoleFront.isDestroyed()) {
+    return;
+  }
+
+  // Request notifying about new messages
+  await webConsoleFront.startListeners(["ConsoleAPI"]);
+
+  // Fetch already existing messages
+  // /!\ The actor implementation requires to call startListeners(ConsoleAPI) first /!\
+  const { messages } = await webConsoleFront.getCachedMessages(["ConsoleAPI"]);
+
+  for (const message of messages) {
+    message.resourceType = ResourceCommand.TYPES.CONSOLE_MESSAGE;
+  }
+  onAvailable(messages);
+
+  // Forward new message events
+  webConsoleFront.on("consoleAPICall", message => {
+    // Ignore console messages that are cloned from the content process
+    // (they aren't relevant to toolboxes still using legacy listeners)
+    if (message.clonedFromContentProcess) {
+      return;
+    }
+
+    message.resourceType = ResourceCommand.TYPES.CONSOLE_MESSAGE;
+    onAvailable([message]);
+  });
+};