1 files changed, 38 insertions, 0 deletions
diff --git a/devtools/client/responsive/reducers/screenshot.js b/devtools/client/responsive/reducers/screenshot.js
new file mode 100644
index 0000000000..67f26f1f9a
--- /dev/null
+++ b/devtools/client/responsive/reducers/screenshot.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 {
+  TAKE_SCREENSHOT_END,
+  TAKE_SCREENSHOT_START,
+} = require("resource://devtools/client/responsive/actions/index.js");
+
+const INITIAL_SCREENSHOT = {
+  isCapturing: false,
+};
+
+const reducers = {
+  [TAKE_SCREENSHOT_END](screenshot, action) {
+    return {
+      ...screenshot,
+      isCapturing: false,
+    };
+  },
+
+  [TAKE_SCREENSHOT_START](screenshot, action) {
+    return {
+      ...screenshot,
+      isCapturing: true,
+    };
+  },
+};
+
+module.exports = function (screenshot = INITIAL_SCREENSHOT, action) {
+  const reducer = reducers[action.type];
+  if (!reducer) {
+    return screenshot;
+  }
+  return reducer(screenshot, action);
+};