1 files changed, 104 insertions, 0 deletions
diff --git a/devtools/server/actors/utils/logEvent.js b/devtools/server/actors/utils/logEvent.js
new file mode 100644
index 0000000000..ae07b393ba
--- /dev/null
+++ b/devtools/server/actors/utils/logEvent.js
@@ -0,0 +1,104 @@
+/* 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 {
+  formatDisplayName,
+} = require("resource://devtools/server/actors/frame.js");
+const {
+  TYPES,
+  getResourceWatcher,
+} = require("resource://devtools/server/actors/resources/index.js");
+
+// Get a string message to display when a frame evaluation throws.
+function getThrownMessage(completion) {
+  try {
+    if (completion.throw.getOwnPropertyDescriptor) {
+      return completion.throw.getOwnPropertyDescriptor("message").value;
+    } else if (completion.toString) {
+      return completion.toString();
+    }
+  } catch (ex) {
+    // ignore
+  }
+  return "Unknown exception";
+}
+module.exports.getThrownMessage = getThrownMessage;
+
+function logEvent({ threadActor, frame, level, expression, bindings }) {
+  const { sourceActor, line, column } =
+    threadActor.sourcesManager.getFrameLocation(frame);
+  const displayName = formatDisplayName(frame);
+
+  // TODO remove this branch when (#1592584) lands (#1609540)
+  if (isWorker) {
+    threadActor._parent._consoleActor.evaluateJS({
+      text: `console.log(...${expression})`,
+      bindings: { displayName, ...bindings },
+      url: sourceActor.url,
+      lineNumber: line,
+    });
+
+    return undefined;
+  }
+
+  const completion = frame.evalWithBindings(
+    expression,
+    {
+      displayName,
+      ...bindings,
+    },
+    { hideFromDebugger: true }
+  );
+
+  let value;
+  if (!completion) {
+    // The evaluation was killed (possibly by the slow script dialog).
+    value = ["Evaluation failed"];
+  } else if ("return" in completion) {
+    value = completion.return;
+  } else {
+    value = [getThrownMessage(completion)];
+    level = `${level}Error`;
+  }
+
+  if (value && typeof value.unsafeDereference === "function") {
+    value = value.unsafeDereference();
+  }
+
+  const targetActor = threadActor._parent;
+  const message = {
+    filename: sourceActor.url,
+    lineNumber: line,
+    columnNumber: column,
+    arguments: value,
+    level,
+    timeStamp: ChromeUtils.dateNow(),
+    chromeContext:
+      targetActor.actorID &&
+      /conn\d+\.parentProcessTarget\d+/.test(targetActor.actorID),
+    // The 'prepareConsoleMessageForRemote' method in webconsoleActor expects internal source ID,
+    // thus we can't set sourceId directly to sourceActorID.
+    sourceId: sourceActor.internalSourceId,
+  };
+
+  // Note that only WindowGlobalTarget actor support resource watcher
+  // This is still missing for worker and content processes
+  const consoleMessageWatcher = getResourceWatcher(
+    targetActor,
+    TYPES.CONSOLE_MESSAGE
+  );
+  if (consoleMessageWatcher) {
+    consoleMessageWatcher.emitMessages([message]);
+  } else {
+    // Bug 1642296: Once we enable ConsoleMessage resource on the server, we should remove onConsoleAPICall
+    // from the WebConsoleActor, and only support the ConsoleMessageWatcher codepath.
+    targetActor._consoleActor.onConsoleAPICall(message);
+  }
+
+  return undefined;
+}
+
+module.exports.logEvent = logEvent;