1 files changed, 32 insertions, 0 deletions
diff --git a/devtools/shared/commands/resource/transformers/thread-states.js b/devtools/shared/commands/resource/transformers/thread-states.js
new file mode 100644
index 0000000000..1564585b36
--- /dev/null
+++ b/devtools/shared/commands/resource/transformers/thread-states.js
@@ -0,0 +1,32 @@
+/* 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 { Front, types } = require("resource://devtools/shared/protocol.js");
+
+module.exports = function ({ resource, watcherFront, targetFront }) {
+  // only "paused" have a frame attribute, and legacy listeners are already passing a FrameFront
+  if (resource.frame && !(resource.frame instanceof Front)) {
+    // Use ThreadFront as parent as debugger's commands.js expects FrameFront to be children
+    // of the ThreadFront.
+    resource.frame = types
+      .getType("frame")
+      .read(resource.frame, targetFront.threadFront);
+  }
+
+  // If we are using server side request (i.e. watcherFront is defined)
+  // Fake paused and resumed events as the thread front depends on them.
+  // We can't emit "EventEmitter" events, as ThreadFront uses `Front.before`
+  // to listen for paused and resumed. ("before" is part of protocol.js Front and not part of EventEmitter)
+  if (watcherFront) {
+    if (resource.state == "paused") {
+      targetFront.threadFront._beforePaused(resource);
+    } else if (resource.state == "resumed") {
+      targetFront.threadFront._beforeResumed(resource);
+    }
+  }
+
+  return resource;
+};