1 files changed, 54 insertions, 0 deletions
diff --git a/devtools/client/inspector/grids/reducers/highlighter-settings.js b/devtools/client/inspector/grids/reducers/highlighter-settings.js
new file mode 100644
index 0000000000..3568390df6
--- /dev/null
+++ b/devtools/client/inspector/grids/reducers/highlighter-settings.js
@@ -0,0 +1,54 @@
+/* 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 {
+  UPDATE_SHOW_GRID_AREAS,
+  UPDATE_SHOW_GRID_LINE_NUMBERS,
+  UPDATE_SHOW_INFINITE_LINES,
+} = require("resource://devtools/client/inspector/grids/actions/index.js");
+
+const SHOW_GRID_AREAS = "devtools.gridinspector.showGridAreas";
+const SHOW_GRID_LINE_NUMBERS = "devtools.gridinspector.showGridLineNumbers";
+const SHOW_INFINITE_LINES = "devtools.gridinspector.showInfiniteLines";
+
+const INITIAL_HIGHLIGHTER_SETTINGS = () => {
+  return {
+    showGridAreasOverlay: Services.prefs.getBoolPref(SHOW_GRID_AREAS),
+    showGridLineNumbers: Services.prefs.getBoolPref(SHOW_GRID_LINE_NUMBERS),
+    showInfiniteLines: Services.prefs.getBoolPref(SHOW_INFINITE_LINES),
+  };
+};
+
+const reducers = {
+  [UPDATE_SHOW_GRID_AREAS](highlighterSettings, { enabled }) {
+    return Object.assign({}, highlighterSettings, {
+      showGridAreasOverlay: enabled,
+    });
+  },
+
+  [UPDATE_SHOW_GRID_LINE_NUMBERS](highlighterSettings, { enabled }) {
+    return Object.assign({}, highlighterSettings, {
+      showGridLineNumbers: enabled,
+    });
+  },
+
+  [UPDATE_SHOW_INFINITE_LINES](highlighterSettings, { enabled }) {
+    return Object.assign({}, highlighterSettings, {
+      showInfiniteLines: enabled,
+    });
+  },
+};
+
+module.exports = function (
+  highlighterSettings = INITIAL_HIGHLIGHTER_SETTINGS(),
+  action
+) {
+  const reducer = reducers[action.type];
+  if (!reducer) {
+    return highlighterSettings;
+  }
+  return reducer(highlighterSettings, action);
+};