1 files changed, 42 insertions, 0 deletions
diff --git a/devtools/client/memory/actions/tree-map-display.js b/devtools/client/memory/actions/tree-map-display.js
new file mode 100644
index 0000000000..e1c4a21132
--- /dev/null
+++ b/devtools/client/memory/actions/tree-map-display.js
@@ -0,0 +1,42 @@
+/* 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 { assert } = require("resource://devtools/shared/DevToolsUtils.js");
+const { actions } = require("resource://devtools/client/memory/constants.js");
+const {
+  refresh,
+} = require("resource://devtools/client/memory/actions/refresh.js");
+/**
+ * Sets the tree map display as the current display and refreshes the tree map
+ * census.
+ */
+exports.setTreeMapAndRefresh = function (heapWorker, display) {
+  return async function ({ dispatch, getState }) {
+    dispatch(setTreeMap(display));
+    await dispatch(refresh(heapWorker));
+  };
+};
+
+/**
+ * Clears out all cached census data in the snapshots and sets new display data
+ * for tree maps.
+ *
+ * @param {treeMapModel} display
+ */
+const setTreeMap = (exports.setTreeMap = function (display) {
+  assert(
+    typeof display === "object" &&
+      display &&
+      display.breakdown &&
+      display.breakdown.by,
+    "Breakdowns must be an object with a `by` property, attempted to set: " +
+      JSON.stringify(display)
+  );
+
+  return {
+    type: actions.SET_TREE_MAP_DISPLAY,
+    display,
+  };
+});