implement j/k hotkeys to move between feeds (closes #292)

3 files changed, 60 insertions, 3 deletions

diff --git a/FeedTree.js b/FeedTree.js
index 26629e8ce..a0d4fc7ea 100644
--- a/FeedTree.js
+++ b/FeedTree.js
@@ -52,6 +52,55 @@ dojo.declare("fox.FeedStoreModel", dijit.tree.ForestStoreModel, {
 		if (treeItem)
 			return this.store.setValue(treeItem, key, value);
 	},
+	getNextFeed: function (feed, is_cat) {
+		if (is_cat) {
+			treeItem = this.store._itemsByIdentity['CAT:' + feed];
+		} else {
+			treeItem = this.store._itemsByIdentity['FEED:' + feed];
+		}
+
+		items = this.store._arrayOfAllItems;
+		var item = items[0];
+
+		for (var i = 0; i < items.length; i++) {
+			if (items[i] == treeItem) {
+				item = items[i+1];
+				break;
+			}
+		}
+
+		if (item) {
+			return [this.store.getValue(item, 'bare_id'), 
+					 	!this.store.getValue(item, 'id').match('FEED:')];
+		} else {
+			return false;
+		}
+	},
+	getPreviousFeed: function (feed, is_cat) {
+		if (is_cat) {
+			treeItem = this.store._itemsByIdentity['CAT:' + feed];
+		} else {
+			treeItem = this.store._itemsByIdentity['FEED:' + feed];
+		}
+
+		items = this.store._arrayOfAllItems;
+		var item = items[items.length-1];
+
+		for (var i = 0; i < items.length; i++) {
+			if (items[i] == treeItem) {
+				item = items[i-1];
+				break;
+			}
+		}
+
+		if (item) {
+			return [this.store.getValue(item, 'bare_id'), 
+					 	!this.store.getValue(item, 'id').match('FEED:')];
+		} else {
+			return false;
+		}
+	},
+
 	getNextUnreadFeed: function (feed, is_cat) {
 		if (is_cat) {
 			treeItem = this.store._itemsByIdentity['CAT:' + feed];
diff --git a/help/3.php b/help/3.php
index c45da8634..d48adc618 100644
--- a/help/3.php
+++ b/help/3.php
@@ -5,7 +5,7 @@
 	<h2><?php echo __("Navigation") ?></h2>
 
 	<table>
-		<!-- <tr><td class='n'>j/k</td><td><?php echo __("Move between feeds") ?></td></tr> -->
+		<tr><td class='n'>j/k</td><td><?php echo __("Move between feeds") ?></td></tr>
 		<tr><td class='n'>n/p</td><td><?php echo __("Move between articles") ?></td></tr>
 		<tr><td class='n'>/</td><td><?php echo __("Show search dialog") ?></td></tr>
 	</table>
diff --git a/tt-rss.js b/tt-rss.js
index 546c22131..9c8f5590a 100644
--- a/tt-rss.js
+++ b/tt-rss.js
@@ -704,12 +704,20 @@ function hotkey_handler(e) {
 			}
 
 			if (keycode == 74) { // j
-				// TODO: move to previous feed
+				var rv = dijit.byId("feedTree").model.getPreviousFeed(
+						getActiveFeedId(), activeFeedIsCat());
+
+				if (rv) viewfeed(rv[0], '', rv[1]);
+
 				return;
 			}
 	
 			if (keycode == 75) { // k
-				// TODO: move to next feed
+				var rv = dijit.byId("feedTree").model.getNextFeed(
+						getActiveFeedId(), activeFeedIsCat());
+
+				if (rv) viewfeed(rv[0], '', rv[1]);
+
 				return;
 			}