From ac743e902af29fd2748399cff5f0115d0afde0a2 Mon Sep 17 00:00:00 2001
From: James Ide <ide@jameside.com>
Date: Sat, 28 Feb 2015 04:22:26 -0800
Subject: [PATCH] [Scroll] Add scrollWithoutAnimationTo to immediately scroll

This is an API like setting the contentOffset except it is imperative, which is usually what you want unless the scroll view is a controlled component.
---
 Libraries/Components/ScrollView/ScrollView.js |  8 ++++++++
 React/Modules/RCTUIManager.m                  | 14 ++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/Libraries/Components/ScrollView/ScrollView.js b/Libraries/Components/ScrollView/ScrollView.js
index 92cdab05ac0bc1..a51a93b9e9259f 100644
--- a/Libraries/Components/ScrollView/ScrollView.js
+++ b/Libraries/Components/ScrollView/ScrollView.js
@@ -195,6 +195,14 @@ var ScrollView = React.createClass({
     );
   },
 
+  scrollWithoutAnimationTo: function(destY?: number, destX?: number) {
+    RCTUIManager.scrollWithoutAnimationTo(
+      this.getNodeHandle(),
+      destX || 0,
+      destY || 0
+    );
+  },
+
   render: function() {
     var contentContainerStyle = [
       this.props.horizontal && styles.contentContainerHorizontal,
diff --git a/React/Modules/RCTUIManager.m b/React/Modules/RCTUIManager.m
index a0e7285c6b0dfb..833ada9725395e 100644
--- a/React/Modules/RCTUIManager.m
+++ b/React/Modules/RCTUIManager.m
@@ -1048,6 +1048,20 @@ - (void)scrollToOffsetWithView:(NSNumber *)reactTag scrollToOffsetX:(NSNumber *)
   }];
 }
 
+- (void)scrollToOffsetWithoutAnimationWithView:(NSNumber *)reactTag scrollToOffsetX:(NSNumber *)offsetX offsetY:(NSNumber *)offsetY
+{
+  RCT_EXPORT(scrollWithoutAnimationTo);
+
+  [self addUIBlock:^(RCTUIManager *uiManager, RCTSparseArray *viewRegistry){
+    UIView *view = viewRegistry[reactTag];
+    if ([view conformsToProtocol:@protocol(RCTScrollableProtocol)]) {
+      [(id<RCTScrollableProtocol>)view scrollToOffset:CGPointMake([offsetX floatValue], [offsetY floatValue]) animated:NO];
+    } else {
+      RCTLogError(@"tried to scrollToOffsetWithoutAnimation: on non-RCTScrollableProtocol view %@ with tag %@", view, reactTag);
+    }
+  }];
+}
+
 - (void)zoomToRectWithView:(NSNumber *)reactTag rect:(NSDictionary *)rectDict
 {
   RCT_EXPORT(zoomToRect);