- update descriptions of changed hotkeys

- bind noscroll variants of move article hotkeys to n/p by default
- update N/P (i.e. scroll article content) hotkeys to scroll by fraction of viewport height instead of hardcoded pixel distance
- minor fixes w/ checking for undefined

include/functions.php

@@ -1041,10 +1041,10 @@
 			__("Navigation") => array(
 				"next_feed" => __("Open next feed"),
 				"prev_feed" => __("Open previous feed"),
-				"next_article" => __("Open next article (scroll long articles)"),
-				"prev_article" => __("Open previous article (scroll long articles)"),
-				"next_article_page" => __("Open next article (scroll down page)"),
-				"prev_article_page" => __("Open previous article (scroll up page)"),
+				"next_article_or_scroll" => __("Open next article (in combined mode, scroll down)"),
+				"prev_article_or_scroll" => __("Open previous article (in combined mode, scroll up)"),
+				"next_article_page" => __("Scroll article by one page down"),
+				"prev_article_page" => __("Scroll article by one page up"),
 				"next_article_noscroll" => __("Open next article"),
 				"prev_article_noscroll" => __("Open previous article"),
 				"next_article_noexpand" => __("Move to next article (don't expand or mark read)"),
@@ -1116,14 +1116,14 @@
 		$hotkeys = array(
 			"k" => "next_feed",
 			"j" => "prev_feed",
-			"n" => "next_article",
-			"p" => "prev_article",
+			"n" => "next_article_noscroll",
+			"p" => "prev_article_noscroll",
 			//"(33)|PageUp" => "prev_article_page",
 			//"(34)|PageDown" => "next_article_page",
-			"*(33)|Shift+PageUp" => "article_page_up",
-			"*(34)|Shift+PageDown" => "article_page_down",
-			"(38)|Up" => "prev_article",
-			"(40)|Down" => "next_article",
+			"*(33)|Shift+PgUp" => "article_page_up",
+			"*(34)|Shift+PgDn" => "article_page_down",
+			"(38)|Up" => "prev_article_or_scroll",
+			"(40)|Down" => "next_article_or_scroll",
 			"*(38)|Shift+Up" => "article_scroll_up",
 			"*(40)|Shift+Down" => "article_scroll_down",
 			"^(38)|Ctrl+Up" => "prev_article_noscroll",

js/Article.js

@@ -329,13 +329,7 @@ define(["dojo/_base/declare"], function (declare) {
 				return 0;
 		},
 		scrollByPages: function (page_offset, event) {
-			let elem;
-
-			if (!App.isCombinedMode()) {
-				elem = $("content-insert");
-			} else {
-				elem = $("headlines-frame");
-			}
+			const elem = App.isCombinedMode() ? $("headlines-frame") : $("content-insert");
 
 			const offset = elem.offsetHeight * page_offset * 0.99;
 
@@ -343,13 +337,7 @@ define(["dojo/_base/declare"], function (declare) {
 		},
 		scroll: function (offset, event) {
 
-			let elem;
-
-			if (!App.isCombinedMode()) {
-				elem = $("content-insert");
-			} else {
-				elem = $("headlines-frame");
-			}
+			const elem = App.isCombinedMode() ? $("headlines-frame") : $("content-insert");
 
 			if (event && event.repeat) {
 				elem.addClassName("forbid-smooth-scroll");

js/tt-rss.js

@@ -277,10 +277,10 @@ require(["dojo/_base/kernel",
 
 						if (rv) Feeds.open({feed: rv[0], is_cat: rv[1], delayed: true})
 					};
-					this.hotkey_actions["next_article"] = function (event) {
+					this.hotkey_actions["next_article_or_scroll"] = function (event) {
 						Headlines.move('next', {event: event});
 					};
-					this.hotkey_actions["prev_article"] = function (event) {
+					this.hotkey_actions["prev_article_or_scroll"] = function (event) {
 						Headlines.move('prev', {event: event});
 					};
 					this.hotkey_actions["next_article_noscroll"] = function (event) {
@@ -325,10 +325,16 @@ require(["dojo/_base/kernel",
 						Headlines.catchupRelativeTo(0);
 					};
 					this.hotkey_actions["article_scroll_down"] = function (event) {
-						Article.scroll(80, event);
+						const ctr = App.isCombinedMode() ? $("headlines-frame") : $("content-insert");
+
+						if (ctr)
+							Article.scroll(ctr.offsetHeight / 2, event);
 					};
 					this.hotkey_actions["article_scroll_up"] = function (event) {
-						Article.scroll(-80, event);
+						const ctr = App.isCombinedMode() ? $("headlines-frame") : $("content-insert");
+
+						if (ctr)
+							Article.scroll(-ctr.offsetHeight / 2, event);
 					};
 					this.hotkey_actions["next_article_page"] = function (event) {
 						Headlines.scrollByPages(1, event);
@@ -375,7 +381,7 @@ require(["dojo/_base/kernel",
 						Headlines.select('none');
 					};
 					this.hotkey_actions["feed_refresh"] = function () {
-						if (Feeds.getActive() != undefined) {
+						if (typeof Feeds.getActive() != "undefined") {
 							Feeds.open({feed: Feeds.getActive(), is_cat: Feeds.activeIsCat()});
 						}
 					};
@@ -405,7 +411,7 @@ require(["dojo/_base/kernel",
 							CommonDialogs.editFeed(Feeds.getActive());
 					};
 					this.hotkey_actions["feed_catchup"] = function () {
-						if (Feeds.getActive() != undefined) {
+						if (typeof Feeds.getActive() != "undefined") {
 							Feeds.catchupCurrent();
 						}
 					};