Generalization of isInAParentText context

Summary:
Currently `isInAParentText` context works as imaginary `isInAAncestorText` context (not like a real `isInAParentText`).
Let's imagine we have hierarchy like:
`View -> Text -> Text* -> View* -> Text* -> Text* -> View*`
With current implementation all nodes marked with asterisk have `isInAParentText` context, which is incorrect (because some of them actually in View context).

With the new implemetations it will work like this:
`View -> Text -> Text* -> View* -> Text -> Text* -> View*`
So, only nodes which have <Text> (or <TextInput>) as a parent will have `isInAParentText` context.

This change allows to select proper `Text` vs. `VirtualText` component in cases where <Text> and <View> components can interleave each other.

Reviewed By: sahrens

Differential Revision: D6690495

fbshipit-source-id: f7c59b23d0eaf68a1d08036b858d99c9547f7878

Libraries/Components/TextInput/TextInput.js

@@ -31,6 +31,7 @@ const TimerMixin = require('react-timer-mixin');
 const TouchableWithoutFeedback = require('TouchableWithoutFeedback');
 const UIManager = require('UIManager');
 const ViewPropTypes = require('ViewPropTypes');
+const {ViewContextTypes} = require('ViewContext');
 
 /* $FlowFixMe(>=0.54.0 site=react_native_oss) This comment suppresses an error
  * found when Flow v0.54 was deployed. To see the error delete this comment and
@@ -48,6 +49,8 @@ const onlyMultiline = {
   children: true,
 };
 
+import type {ViewChildContext} from 'ViewContext';
+
 if (Platform.OS === 'android') {
   var AndroidTextInput = requireNativeComponent('AndroidTextInput', null);
 } else if (Platform.OS === 'ios') {
@@ -612,11 +615,6 @@ const TextInput = createReactClass({
     );
   },
 
-  contextTypes: {
-    onFocusRequested: PropTypes.func,
-    focusEmitter: PropTypes.instanceOf(EventEmitter),
-  },
-
   _inputRef: (undefined: any),
   _focusSubscription: (undefined: ?Function),
   _lastNativeText: (undefined: ?string),
@@ -652,12 +650,18 @@ const TextInput = createReactClass({
     }
   },
 
-  getChildContext: function(): Object {
+  getChildContext(): ViewChildContext {
-    return {isInAParentText: true};
+    return {
+      isInAParentText: true,
+    };
   },
 
-  childContextTypes: {
+  childContextTypes: ViewContextTypes,
-    isInAParentText: PropTypes.bool,
+
+  contextTypes: {
+    ...ViewContextTypes,
+    onFocusRequested: PropTypes.func,
+    focusEmitter: PropTypes.instanceOf(EventEmitter),
   },
 
   /**

Libraries/Components/View/View.js

@@ -14,17 +14,18 @@
 
 const NativeMethodsMixin = require('NativeMethodsMixin');
 const Platform = require('Platform');
-const PropTypes = require('prop-types');
 const React = require('React');
 const ReactNativeStyleAttributes = require('ReactNativeStyleAttributes');
 const ReactNativeViewAttributes = require('ReactNativeViewAttributes');
 const ViewPropTypes = require('ViewPropTypes');
+const {ViewContextTypes} = require('ViewContext');
 
 const createReactClass = require('create-react-class');
 const invariant = require('fbjs/lib/invariant');
 const requireNativeComponent = require('requireNativeComponent');
 
 import type {ViewProps} from 'ViewPropTypes';
+import type {ViewChildContext} from 'ViewContext';
 
 export type Props = ViewProps;
 
@@ -56,8 +57,12 @@ const View = createReactClass({
     validAttributes: ReactNativeViewAttributes.RCTView,
   },
 
-  contextTypes: {
+  childContextTypes: ViewContextTypes,
-    isInAParentText: PropTypes.bool,
+
+  getChildContext(): ViewChildContext {
+    return {
+      isInAParentText: false,
+    };
   },
 
   render() {

Libraries/Components/View/ViewContext.js

@@ -0,0 +1,23 @@
+/**
+ * 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.
+ *
+ * @providesModule ViewContext
+ * @flow
+ * @format
+ */
+'use strict';
+
+const PropTypes = require('prop-types');
+
+export type ViewChildContext = {|
+  +isInAParentText: boolean,
+|};
+
+export const ViewContextTypes = {
+  isInAParentText: PropTypes.bool,
+};

Libraries/Image/Image.android.js

@@ -22,17 +22,17 @@ var ReactNativeViewAttributes = require('ReactNativeViewAttributes');
 var Set = require('Set');
 var StyleSheet = require('StyleSheet');
 var StyleSheetPropType = require('StyleSheetPropType');
-var View = require('View');
 var ViewPropTypes = require('ViewPropTypes');
 var ViewStylePropTypes = require('ViewStylePropTypes');
 
 var createReactClass = require('create-react-class');
-var filterObject = require('fbjs/lib/filterObject');
 var flattenStyle = require('flattenStyle');
 var merge = require('merge');
 var requireNativeComponent = require('requireNativeComponent');
 var resolveAssetSource = require('resolveAssetSource');
 
+const {ViewContextTypes} = require('ViewContext');
+
 var {ImageLoader} = NativeModules;
 
 let _requestId = 1;
@@ -261,9 +261,7 @@ var Image = createReactClass({
     validAttributes: ReactNativeViewAttributes.RCTView,
   },
 
-  contextTypes: {
+  contextTypes: ViewContextTypes,
-    isInAParentText: PropTypes.bool,
-  },
 
   render: function() {
     const source = resolveAssetSource(this.props.source);

Libraries/Text/Text.js

@@ -26,9 +26,12 @@ const createReactClass = require('create-react-class');
 const requireNativeComponent = require('requireNativeComponent');
 const mergeFast = require('mergeFast');
 const processColor = require('processColor');
+const {ViewContextTypes} = require('ViewContext');
 
 const stylePropType = StyleSheetPropType(TextStylePropTypes);
 
+import type {ViewChildContext} from 'ViewContext';
+
 /**
  * A React component for displaying text.
  *
@@ -401,15 +404,13 @@ const Text = createReactClass({
     });
   },
   mixins: [NativeMethodsMixin],
-  getChildContext(): Object {
+  getChildContext(): ViewChildContext {
-    return {isInAParentText: true};
+    return {
-  },
+      isInAParentText: true,
-  childContextTypes: {
+    };
-    isInAParentText: PropTypes.bool,
-  },
-  contextTypes: {
-    isInAParentText: PropTypes.bool,
   },
+  childContextTypes: ViewContextTypes,
+  contextTypes: ViewContextTypes,
   /**
    * Only assigned if touch is needed.
    */