From e9863299abf9498c67660e8a97c70ddb090baffe Mon Sep 17 00:00:00 2001
From: Shin'ya Ueoka <ueokande@i-beam.org>
Date: Sun, 17 Sep 2017 12:52:24 +0900
Subject: implement go-parent command

---
 src/content/navigates.js | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

(limited to 'src/content/navigates.js')

diff --git a/src/content/navigates.js b/src/content/navigates.js
index b68052d..692b7be 100644
--- a/src/content/navigates.js
+++ b/src/content/navigates.js
@@ -44,4 +44,23 @@ const linkNext = (win) => {
   }
 };
 
-export { historyPrev, historyNext, linkPrev, linkNext };
+const parent = (win) => {
+  let loc = win.location;
+  if (loc.hash !== '') {
+    loc.hash = '';
+    return;
+  } else if (loc.search !== '') {
+    loc.search = '';
+    return;
+  }
+
+  const basenamePattern = /\/[^/]+$/;
+  const lastDirPattern = /\/[^/]+\/$/;
+  if (basenamePattern.test(loc.pathname)) {
+    loc.pathname = loc.pathname.replace(basenamePattern, '/');
+  } else if (lastDirPattern.test(loc.pathname)) {
+    loc.pathname = loc.pathname.replace(lastDirPattern, '/');
+  }
+};
+
+export { historyPrev, historyNext, linkPrev, linkNext, parent };
-- 
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