1 files changed, 38 insertions, 0 deletions
diff --git a/devtools/client/memory/actions/label-display.js b/devtools/client/memory/actions/label-display.js
new file mode 100644
index 000000000..6e68293ab
--- /dev/null
+++ b/devtools/client/memory/actions/label-display.js
@@ -0,0 +1,38 @@
+/* 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("devtools/shared/DevToolsUtils");
+const { actions } = require("../constants");
+const { refresh } = require("./refresh");
+
+/**
+ * Change the display we use for labeling individual nodes and refresh the
+ * current data.
+ */
+exports.setLabelDisplayAndRefresh = function (heapWorker, display) {
+  return function* (dispatch, getState) {
+    // Clears out all stored census data and sets the display.
+    dispatch(setLabelDisplay(display));
+    yield dispatch(refresh(heapWorker));
+  };
+};
+
+/**
+ * Change the display we use for labeling individual nodes.
+ *
+ * @param {labelDisplayModel} display
+ */
+const setLabelDisplay = exports.setLabelDisplay = function (display) {
+  assert(typeof display === "object"
+         && display
+         && display.breakdown
+         && display.breakdown.by,
+    `Breakdowns must be an object with a \`by\` property, attempted to set: ${uneval(display)}`);
+
+  return {
+    type: actions.SET_LABEL_DISPLAY,
+    display,
+  };
+};