Create ImageContext object to allow udpating the analyticsTag prop for RN sections

Summary:
As part of this diff I create the new ImageContext object that will be used to allow the update of the analyticsTag prop for components that contain multiple images in their view hierarchy

changelog: [JS][Added] Add ImageContext object, this object can be used to update the Imageview's analyticsTag prop on RN components that contain multiple images in their view hierarchy

Reviewed By: JoshuaGross

Differential Revision: D20880603

fbshipit-source-id: f2094bfd3ab1c867cf7c107e678a098aab7e94a8

Libraries/Image/Image.android.js

@@ -20,6 +20,7 @@ const ReactNative = require('../Renderer/shims/ReactNative'); // eslint-disable-
 const StyleSheet = require('../StyleSheet/StyleSheet');
 const TextAncestor = require('../Text/TextAncestor');
 
+const ImageContext = require('./ImageContext');
 const flattenStyle = require('../StyleSheet/flattenStyle');
 const resolveAssetSource = require('./resolveAssetSource');
 
@@ -292,15 +293,25 @@ let Image = (props: ImagePropsType, forwardedRef) => {
   };
 
   return (
-    <TextAncestor.Consumer>
-      {hasTextAncestor =>
-        hasTextAncestor ? (
-          <TextInlineImageNativeComponent {...nativeProps} />
-        ) : (
-          <ImageViewNativeComponent {...nativeProps} />
-        )
-      }
-    </TextAncestor.Consumer>
+    <ImageContext.Consumer>
+      {analyticTag => {
+        const nativePropsWithAnalytics = {
+          ...nativeProps,
+          analyticTag: analyticTag,
+        };
+        return (
+          <TextAncestor.Consumer>
+            {hasTextAncestor =>
+              hasTextAncestor ? (
+                <TextInlineImageNativeComponent {...nativePropsWithAnalytics} />
+              ) : (
+                <ImageViewNativeComponent {...nativePropsWithAnalytics} />
+              )
+            }
+          </TextAncestor.Consumer>
+        );
+      }}
+    </ImageContext.Consumer>
   );
 };
 

Libraries/Image/ImageContext.js

@@ -0,0 +1,15 @@
+/**
+ * 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 strict
+ * @format
+ */
+
+'use strict';
+
+const React = require('react');
+
+module.exports = (React.createContext(null): React$Context<$FlowFixMe>);