1 files changed, 44 insertions, 0 deletions
diff --git a/devtools/client/debugger/src/utils/source-queue.js b/devtools/client/debugger/src/utils/source-queue.js
new file mode 100644
index 0000000000..78aac2d5dc
--- /dev/null
+++ b/devtools/client/debugger/src/utils/source-queue.js
@@ -0,0 +1,44 @@
+/* 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/>. */
+
+// @flow
+
+import { throttle } from "lodash";
+import type { QueuedSourceData } from "../types";
+
+// This SourceQueue module is now only used for source mapped sources
+let newQueuedSources;
+let queuedSources;
+let currentWork;
+
+async function dispatchNewSources(): Promise<void> {
+  const sources = queuedSources;
+  queuedSources = [];
+  currentWork = await newQueuedSources(sources);
+}
+
+const queue = throttle(dispatchNewSources, 100);
+
+export default {
+  initialize: (actions: Object) => {
+    newQueuedSources = actions.newQueuedSources;
+    queuedSources = [];
+  },
+  queue: (source: QueuedSourceData) => {
+    queuedSources.push(source);
+    queue();
+  },
+  queueSources: (sources: QueuedSourceData[]) => {
+    if (sources.length > 0) {
+      queuedSources = queuedSources.concat(sources);
+      queue();
+    }
+  },
+
+  flush: () => Promise.all([queue.flush(), currentWork]),
+  clear: () => {
+    queuedSources = [];
+    queue.cancel();
+  },
+};