yeet

node_modules/react-native/Libraries/Animated/src/nodes/AnimatedTracking.js

@@ -0,0 +1,102 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ * @format
+ */
+
+'use strict';
+
+const AnimatedValue = require('./AnimatedValue');
+const AnimatedNode = require('./AnimatedNode');
+const {
+  generateNewAnimationId,
+  shouldUseNativeDriver,
+} = require('../NativeAnimatedHelper');
+
+import type {EndCallback} from '../animations/Animation';
+
+class AnimatedTracking extends AnimatedNode {
+  _value: AnimatedValue;
+  _parent: AnimatedNode;
+  _callback: ?EndCallback;
+  _animationConfig: Object;
+  _animationClass: any;
+  _useNativeDriver: boolean;
+
+  constructor(
+    value: AnimatedValue,
+    parent: AnimatedNode,
+    animationClass: any,
+    animationConfig: Object,
+    callback?: ?EndCallback,
+  ) {
+    super();
+    this._value = value;
+    this._parent = parent;
+    this._animationClass = animationClass;
+    this._animationConfig = animationConfig;
+    this._useNativeDriver = shouldUseNativeDriver(animationConfig);
+    this._callback = callback;
+    this.__attach();
+  }
+
+  __makeNative() {
+    this.__isNative = true;
+    this._parent.__makeNative();
+    super.__makeNative();
+    this._value.__makeNative();
+  }
+
+  __getValue(): Object {
+    return this._parent.__getValue();
+  }
+
+  __attach(): void {
+    this._parent.__addChild(this);
+    if (this._useNativeDriver) {
+      // when the tracking starts we need to convert this node to a "native node"
+      // so that the parent node will be made "native" too. This is necessary as
+      // if we don't do this `update` method will get called. At that point it
+      // may be too late as it would mean the JS driver has already started
+      // updating node values
+      this.__makeNative();
+    }
+  }
+
+  __detach(): void {
+    this._parent.__removeChild(this);
+    super.__detach();
+  }
+
+  update(): void {
+    this._value.animate(
+      new this._animationClass({
+        ...this._animationConfig,
+        toValue: (this._animationConfig.toValue: any).__getValue(),
+      }),
+      this._callback,
+    );
+  }
+
+  __getNativeConfig(): any {
+    const animation = new this._animationClass({
+      ...this._animationConfig,
+      // remove toValue from the config as it's a ref to Animated.Value
+      toValue: undefined,
+    });
+    const animationConfig = animation.__getNativeAnimationConfig();
+    return {
+      type: 'tracking',
+      animationId: generateNewAnimationId(),
+      animationConfig,
+      toValue: this._parent.__getNativeTag(),
+      value: this._value.__getNativeTag(),
+    };
+  }
+}
+
+module.exports = AnimatedTracking;