From 9b4927c9c444c61b8ddf3c1f17325d1b85bf6a2d Mon Sep 17 00:00:00 2001
From: Ryan Gomba <ryan@ryangomba.com>
Date: Wed, 2 Nov 2016 14:47:42 -0700
Subject: [PATCH] Implement NativeAnimated modulus node on Android

Summary:
This diff implements ModulusAnimatedNode on Android, bringing Android up to date with JS and iOS native animation APIs.
Closes https://github.com/facebook/react-native/pull/10681

Differential Revision: D4120162

fbshipit-source-id: 4e58e1b6309c1c7a12ef835547a3f3d321c20714
---
 .../react/animated/ModulusAnimatedNode.java   | 40 +++++++++++++++++++
 .../animated/NativeAnimatedNodesManager.java  |  2 +
 2 files changed, 42 insertions(+)
 create mode 100644 ReactAndroid/src/main/java/com/facebook/react/animated/ModulusAnimatedNode.java

diff --git a/ReactAndroid/src/main/java/com/facebook/react/animated/ModulusAnimatedNode.java b/ReactAndroid/src/main/java/com/facebook/react/animated/ModulusAnimatedNode.java
new file mode 100644
index 000000000..102ff1200
--- /dev/null
+++ b/ReactAndroid/src/main/java/com/facebook/react/animated/ModulusAnimatedNode.java
@@ -0,0 +1,40 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+package com.facebook.react.animated;
+
+import com.facebook.react.bridge.JSApplicationCausedNativeException;
+import com.facebook.react.bridge.ReadableArray;
+import com.facebook.react.bridge.ReadableMap;
+
+/*package*/ class ModulusAnimatedNode extends ValueAnimatedNode {
+
+  private final NativeAnimatedNodesManager mNativeAnimatedNodesManager;
+  private final int mInputNode;
+  private final int mModulus;
+
+  public ModulusAnimatedNode(
+      ReadableMap config,
+      NativeAnimatedNodesManager nativeAnimatedNodesManager) {
+    mNativeAnimatedNodesManager = nativeAnimatedNodesManager;
+    mInputNode = config.getInt("input");
+    mModulus = config.getInt("modulus");
+  }
+
+  @Override
+  public void update() {
+    AnimatedNode animatedNode = mNativeAnimatedNodesManager.getNodeById(mInputNode);
+    if (animatedNode != null && animatedNode instanceof ValueAnimatedNode) {
+      mValue = ((ValueAnimatedNode) animatedNode).mValue % mModulus;
+    } else {
+      throw new JSApplicationCausedNativeException("Illegal node ID set as an input for " +
+        "Animated.modulus node");
+    }
+  }
+}
diff --git a/ReactAndroid/src/main/java/com/facebook/react/animated/NativeAnimatedNodesManager.java b/ReactAndroid/src/main/java/com/facebook/react/animated/NativeAnimatedNodesManager.java
index ecd54345f..622c497a6 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/animated/NativeAnimatedNodesManager.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/animated/NativeAnimatedNodesManager.java
@@ -93,6 +93,8 @@ import javax.annotation.Nullable;
       node = new DivisionAnimatedNode(config, this);
     } else if ("multiplication".equals(type)) {
       node = new MultiplicationAnimatedNode(config, this);
+    } else if ("modulus".equals(type)) {
+      node = new ModulusAnimatedNode(config, this);
     } else if ("diffclamp".equals(type)) {
       node = new DiffClampAnimatedNode(config, this);
     } else if ("transform".equals(type)) {