From 5ac4dd95939084582e81bb1eb84dbc9a7b805c7a Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Sat, 14 Jun 2014 14:11:42 +0200
Subject: [PATCH] Prevent rendering unnecessary pages when the HOME/END keys
 are pressed

Currently (at least in Firefox) when the HOME/END keys are pressed, this will trigger unnecessary rendering of pages that lay between the current page and the first/last page. Avoid this by going straight to the first/last page instead.
---
 web/viewer.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/web/viewer.js b/web/viewer.js
index 15eedcb54..2e56a912b 100644
--- a/web/viewer.js
+++ b/web/viewer.js
@@ -2347,13 +2347,14 @@ window.addEventListener('keydown', function keydown(evt) {
         break;
 
       case 36: // home
-        if (PresentationMode.active) {
+        if (PresentationMode.active || PDFView.page > 1) {
           PDFView.page = 1;
           handled = true;
         }
         break;
       case 35: // end
-        if (PresentationMode.active) {
+        if (PresentationMode.active ||
+            PDFView.page < PDFView.pdfDocument.numPages) {
           PDFView.page = PDFView.pdfDocument.numPages;
           handled = true;
         }