implement go-parent command

src/background/keys.js

@@ -32,6 +32,7 @@ const defaultKeymap = {
   'L': { type: operations.NAVIGATE_HISTORY_NEXT },
   '[[': { type: operations.NAVIGATE_LINK_PREV },
   ']]': { type: operations.NAVIGATE_LINK_NEXT },
+  'gu': { type: operations.NAVIGATE_PARENT },
 };
 
 const asKeymapChars = (keys) => {

src/content/index.js

@@ -43,6 +43,8 @@ const execOperation = (operation) => {
     return navigates.linkPrev(window);
   case operations.NAVIGATE_LINK_NEXT:
     return navigates.linkNext(window);
+  case operations.NAVIGATE_PARENT:
+    return navigates.parent(window);
   }
 };
 

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 };

src/operations/index.js

@@ -15,6 +15,7 @@ export default {
   NAVIGATE_HISTORY_NEXT: 'navigate.history.next',
   NAVIGATE_LINK_PREV: 'navigate.link.prev',
   NAVIGATE_LINK_NEXT: 'navigate.link.next',
+  NAVIGATE_PARENT: 'navigate.parent',
 
   // Background
   TABS_CLOSE: 'tabs.close',