1 files changed, 52 insertions, 0 deletions
diff --git a/devtools/client/netmonitor/reducers/timing-markers.js b/devtools/client/netmonitor/reducers/timing-markers.js
new file mode 100644
index 000000000..cb500b2c4
--- /dev/null
+++ b/devtools/client/netmonitor/reducers/timing-markers.js
@@ -0,0 +1,52 @@
+/* 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 I = require("devtools/client/shared/vendor/immutable");
+const { ADD_TIMING_MARKER,
+        CLEAR_TIMING_MARKERS } = require("../constants");
+
+const TimingMarkers = I.Record({
+  firstDocumentDOMContentLoadedTimestamp: -1,
+  firstDocumentLoadTimestamp: -1,
+});
+
+function addTimingMarker(state, action) {
+  if (action.marker.name == "document::DOMContentLoaded" &&
+      state.firstDocumentDOMContentLoadedTimestamp == -1) {
+    return state.set("firstDocumentDOMContentLoadedTimestamp",
+                     action.marker.unixTime / 1000);
+  }
+
+  if (action.marker.name == "document::Load" &&
+      state.firstDocumentLoadTimestamp == -1) {
+    return state.set("firstDocumentLoadTimestamp",
+                     action.marker.unixTime / 1000);
+  }
+
+  return state;
+}
+
+function clearTimingMarkers(state) {
+  return state.withMutations(st => {
+    st.remove("firstDocumentDOMContentLoadedTimestamp");
+    st.remove("firstDocumentLoadTimestamp");
+  });
+}
+
+function timingMarkers(state = new TimingMarkers(), action) {
+  switch (action.type) {
+    case ADD_TIMING_MARKER:
+      return addTimingMarker(state, action);
+
+    case CLEAR_TIMING_MARKERS:
+      return clearTimingMarkers(state);
+
+    default:
+      return state;
+  }
+}
+
+module.exports = timingMarkers;