pgup/pgdown hotkey normalization:

- pgup/pgdown without modifier scroll headline buffer
- shift+pgup/pgdown work similarly to shift+up/down but operating on pages

include/functions.php

@@ -1114,14 +1114,16 @@
 			"j" => "prev_feed",
 			"n" => "next_article",
 			"p" => "prev_article",
+			"(33)|PageUp" => "prev_article_page",
+			"(34)|PageDown" => "next_article_page",
 			"(38)|Up" => "prev_article",
 			"(40)|Down" => "next_article",
 			"*(38)|Shift+Up" => "article_scroll_up",
 			"*(40)|Shift+Down" => "article_scroll_down",
 			"^(38)|Ctrl+Up" => "prev_article_noscroll",
 			"^(40)|Ctrl+Down" => "next_article_noscroll",
-			"(33)|Page Up" => "article_page_up",
+			"^(33)|Shift+PageUp" => "article_page_up",
-			"(34)|Page Down" => "article_page_down",
+			"^(34)|Shift+PageDown" => "article_page_down",
 			"/" => "search_dialog",
 			"s" => "toggle_mark",
 			"S" => "toggle_publ",

js/Article.js

@@ -314,7 +314,7 @@ define(["dojo/_base/declare"], function (declare) {
 			else
 				return 0;
 		},
-		scrollPages: function (offset) {
+		scrollByPages: function (offset) {
 			if (!App.isCombinedMode()) {
 				const ci = $("content-insert");
 				if (ci) {

js/Headlines.js

@@ -1381,6 +1381,12 @@ define(["dojo/_base/declare"], function (declare) {
 
 			}
 		},
+		scrollByPages: function (offset) {
+			const hi = $("headlines-frame");
+			if (hi) {
+				hi.scrollTop += hi.offsetHeight * offset * 0.9;
+			}
+		},
 		initHeadlinesMenu: function () {
 			if (!dijit.byId("headlinesMenu")) {
 

js/tt-rss.js

@@ -330,11 +330,17 @@ require(["dojo/_base/kernel",
 					this.hotkey_actions["article_scroll_up"] = function () {
 						Article.scroll(-40);
 					};
+					this.hotkey_actions["next_article_page"] = function () {
+						Headlines.scrollByPages(1);
+					};
+					this.hotkey_actions["prev_article_page"] = function () {
+						Headlines.scrollByPages(-1);
+					};
 					this.hotkey_actions["article_page_down"] = function () {
-						Article.scrollPages(1);
+						Article.scrollByPages(1);
 					};
 					this.hotkey_actions["article_page_up"] = function () {
-						Article.scrollPages(-1);
+						Article.scrollByPages(-1);
 					};
 					this.hotkey_actions["close_article"] = function () {
 						if (App.isCombinedMode()) {