1 files changed, 8 insertions, 3 deletions
diff --git a/src/Utils.ts b/src/Utils.ts
index 38eb51529..e6aa0ad8b 100644
--- a/src/Utils.ts
+++ b/src/Utils.ts
@@ -8,6 +8,7 @@ import Color = require('color');
 
 export namespace Utils {
     export let DRAG_THRESHOLD = 4;
+    export let SNAP_THRESHOLD = 10;
 
     export function readUploadedFileAsText(inputFile: File) {
         const temporaryFileReader = new FileReader();
@@ -204,11 +205,11 @@ export namespace Utils {
         return { h: h, s: s, l: l };
     }
 
-    export function scrollIntoView(targetY: number, targetHgt: number, scrollTop: number, contextHgt: number, minSpacing: number) {
-        if (scrollTop + contextHgt < targetY + minSpacing + targetHgt) {
+    export function scrollIntoView(targetY: number, targetHgt: number, scrollTop: number, contextHgt: number, minSpacing: number, scrollHeight: number) {
+        if (scrollTop + contextHgt < Math.min(scrollHeight, targetY + minSpacing + targetHgt)) {
             return Math.ceil(targetY + minSpacing + targetHgt - contextHgt);
         }
-        if (scrollTop > targetY - minSpacing - targetHgt) {
+        if (scrollTop >= Math.max(0, targetY - minSpacing - targetHgt)) {
             return Math.max(0, Math.floor(targetY - minSpacing - targetHgt));
         }
     }
@@ -440,6 +441,10 @@ export function returnTrue() { return true; }
 
 export function returnFalse() { return false; }
 
+export function returnAll() { return "all"; }
+
+export function returnNone() { return "none"; }
+
 export function returnVal(val1?: number, val2?: number) { return val1 !== undefined ? val1 : val2 !== undefined ? val2 : 0; }
 
 export function returnOne() { return 1; }