From 20e619ea213d6ccbb8adb6ba8c3f6bfd6b7c1d5b Mon Sep 17 00:00:00 2001
From: Rowan Hogan <rowan.hogan@gmail.com>
Date: Sat, 13 Jun 2015 15:00:54 +1000
Subject: [PATCH] Adds viewport dimension panning options (and related keyboard
 shortcuts).

---
 js/id/ui.js | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/js/id/ui.js b/js/id/ui.js
index b568c9b8e..cb545665f 100644
--- a/js/id/ui.js
+++ b/js/id/ui.js
@@ -154,7 +154,10 @@ iD.ui = function(context) {
             context.history().unlock();
         };
 
+        var mapDimensions = map.dimensions();
+
         d3.select(window).on('resize.editor', function() {
+            mapDimensions = m.dimensions();
             map.dimensions(m.dimensions());
         });
 
@@ -165,14 +168,18 @@ iD.ui = function(context) {
         }
 
         // pan amount
-        var pa = 5;
+        var pa = 10;
 
         var keybinding = d3.keybinding('main')
             .on('⌫', function() { d3.event.preventDefault(); })
             .on('←', pan([pa, 0]))
             .on('↑', pan([0, pa]))
             .on('→', pan([-pa, 0]))
-            .on('↓', pan([0, -pa]));
+            .on('↓', pan([0, -pa]))
+            .on('shift+←', pan([mapDimensions[0], 0]))
+            .on('shift+↑', pan([0, mapDimensions[1]]))
+            .on('shift+→', pan([-mapDimensions[0], 0]))
+            .on('shift+↓', pan([0, -mapDimensions[1]]));
 
         d3.select(document)
             .call(keybinding);