set N/P hotkeys to scroll active article (or headlines pane in CDM)

help/3.php

@@ -18,7 +18,9 @@
 		<tr><td class='n'>u</td><td><?php echo __("Toggle unread") ?></td></tr>
 		<tr><td class='n'>T</td><td><?php echo __("Edit tags") ?></td></tr>
 		<tr><td class='n'>o</td><td><?php echo __("Open article in new window") ?></td></tr>
-		<tr><td class='n'>N/P</td><td><?php echo __("Mark articles below/above active one as read") ?></td></tr>
+		<tr><td class='n'>c n/c p</td><td><?php echo __("Mark articles below/above active one as read") ?></td></tr>
+		<tr><td class='n'>N/P</td><td><?php echo __("Scroll article content") ?></td></tr>
+
 	</table>
 
 	<h2><?php echo __("Other actions") ?></h2>

tt-rss.js

@@ -1134,16 +1134,27 @@ function hotkey_handler(e) {
 				return;
 			}
 
-			if (shift_key && (keycode == 78 || keycode == 40)) { // shift - n, down
+			if (shift_key && keycode == 40) { // shift-down
 				catchupRelativeToArticle(1);
 				return;
 			}
 
-			if (shift_key && (keycode == 80 || keycode == 38)) { // shift - p, up
+			if (shift_key && keycode == 38) { // shift-up
 				catchupRelativeToArticle(0);
 				return;
 			}
 
+			if (shift_key && keycode == 78) { // N
+				scrollArticle(50);	
+				return;
+			}
+
+			if (shift_key && keycode == 80) { // P
+				scrollArticle(-50);	
+				return;
+			}
+
+
 			if (keycode == 78 || keycode == 40) { // n, down
 				if (typeof moveToPost != 'undefined') {
 					moveToPost('next');
@@ -1332,6 +1343,17 @@ function hotkey_handler(e) {
 				}
 			}
 
+			if (keycode == 78) { // n
+				catchupRelativeToArticle(1);
+				return;
+			}
+
+			if (keycode == 80) { // p
+				catchupRelativeToArticle(0);
+				return;
+			}
+
+
 		}
 
 		/* Prefix g */

viewfeed.js

@@ -1903,3 +1903,22 @@ function zoomToArticle(id) {
 		exception_error("zoomToArticle", e);
 	}
 }
+
+function scrollArticle(offset) {
+	try {
+		if (!isCdmMode()) {
+			var ci = document.getElementById("content-insert");
+			if (ci) {
+				ci.scrollTop += offset;
+			}
+		} else {
+			var hi = document.getElementById("headlinesInnerContainer");
+			if (hi) {
+				hi.scrollTop += offset;
+			}
+
+		}
+	} catch (e) {
+		exception_error("scrollArticle", e);
+	}
+}