From 1afbde6e199309703f07f2d031632d9d2422a3d5 Mon Sep 17 00:00:00 2001
From: Shin'ya Ueoka <ueokande@i-beam.org>
Date: Wed, 23 Aug 2017 21:28:50 +0900
Subject: support history navigation

---
 src/content/histories.js | 8 ++++++++
 src/content/index.js     | 9 ++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 src/content/histories.js

(limited to 'src/content')

diff --git a/src/content/histories.js b/src/content/histories.js
new file mode 100644
index 0000000..2e34dc6
--- /dev/null
+++ b/src/content/histories.js
@@ -0,0 +1,8 @@
+const prev = (win) => {
+  win.history.back()
+};
+const next = (win) => {
+  win.history.forward()
+};
+
+export { prev, next };
diff --git a/src/content/index.js b/src/content/index.js
index 78389fd..2bbe39c 100644
--- a/src/content/index.js
+++ b/src/content/index.js
@@ -1,7 +1,8 @@
 import * as scrolls from './scrolls';
+import * as histories from './histories';
+import * as actions from '../shared/actions';
 import FooterLine from './footer-line';
 import Follow from './follow';
-import * as actions from '../shared/actions';
 
 var footer = null;
 
@@ -56,6 +57,12 @@ const invokeEvent = (action) => {
   case actions.FOLLOW_START:
     new Follow(window.document, action[1] || false);
     break;
+  case actions.HISTORY_PREV:
+    histories.prev(window);
+    break;
+  case actions.HISTORY_NEXT:
+    histories.next(window);
+    break;
   }
 }
 
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