Implement TextInput onContentSizeChange

Examples/UIExplorer/TextInputExample.android.js

@@ -76,18 +76,21 @@ var TextEventsExample = React.createClass({
 class AutoExpandingTextInput extends React.Component {
   constructor(props) {
     super(props);
-    this.state = {text: '', height: 0};
+    this.state = {
+      text: 'React Native enables you to build world-class application experiences on native platforms using a consistent developer experience based on JavaScript and React. The focus of React Native is on developer efficiency across all the platforms you care about — learn once, write anywhere. Facebook uses React Native in multiple production apps and will continue investing in React Native.',
+      height: 0,
+    };
   }
   render() {
     return (
       <TextInput
         {...this.props}
         multiline={true}
-        onChange={(event) => {
-          this.setState({
-            text: event.nativeEvent.text,
-            height: event.nativeEvent.contentSize.height,
-          });
+        onContentSizeChange={(contentSize) => {
+          this.setState({height: contentSize.height});
+        }}
+        onChangeText={(text) => {
+          this.setState({text});
         }}
         style={[styles.default, {height: Math.max(35, this.state.height)}]}
         value={this.state.text}
@@ -412,19 +415,19 @@ exports.examples = [
     render: function() {
       return (
         <View>
-          <TextInput 
+          <TextInput
             style={[styles.singleLine, {fontFamily: 'sans-serif'}]}
             placeholder="Custom fonts like Sans-Serif are supported"
           />
-          <TextInput 
+          <TextInput
             style={[styles.singleLine, {fontFamily: 'sans-serif', fontWeight: 'bold'}]}
             placeholder="Sans-Serif bold"
           />
-          <TextInput 
+          <TextInput
             style={[styles.singleLine, {fontFamily: 'sans-serif', fontStyle: 'italic'}]}
             placeholder="Sans-Serif italic"
           />
-          <TextInput 
+          <TextInput
             style={[styles.singleLine, {fontFamily: 'serif'}]}
             placeholder="Serif"
           />

Examples/UIExplorer/TextInputExample.ios.js

@@ -102,18 +102,21 @@ class AutoExpandingTextInput extends React.Component {
 
   constructor(props) {
     super(props);
-    this.state = {text: '', height: 0};
+    this.state = {
+      text: 'React Native enables you to build world-class application experiences on native platforms using a consistent developer experience based on JavaScript and React. The focus of React Native is on developer efficiency across all the platforms you care about — learn once, write anywhere. Facebook uses React Native in multiple production apps and will continue investing in React Native.',
+      height: 0,
+    };
   }
   render() {
     return (
       <TextInput
         {...this.props}
         multiline={true}
-        onChange={(event) => {
-          this.setState({
-            text: event.nativeEvent.text,
-            height: event.nativeEvent.contentSize.height,
-          });
+        onChangeText={(text) => {
+          this.setState({text});
+        }}
+        onContentSizeChange={(contentSize) => {
+          this.setState({height: contentSize.height});
         }}
         style={[styles.default, {height: Math.max(35, this.state.height)}]}
         value={this.state.text}

Libraries/Components/TextInput/TextInput.js

@@ -310,6 +310,11 @@ const TextInput = React.createClass({
      * Changed text is passed as an argument to the callback handler.
      */
     onChangeText: PropTypes.func,
+    /**
+     * Callback that is called when the text input's content size changes.
+     * The new content size is passed as an argument to the callback.
+     */
+    onContentSizeChange: PropTypes.func,
     /**
      * Callback that is called when text input ends.
      */
@@ -523,6 +528,11 @@ const TextInput = React.createClass({
       };
     }
 
+    var onContentSizeChange;
+    if (this.props.onContentSizeChange) {
+      onContentSizeChange = this._onContentSizeChange;
+    }
+
     var props = Object.assign({}, this.props);
     props.style = [styles.input, this.props.style];
     if (!props.multiline) {
@@ -566,6 +576,7 @@ const TextInput = React.createClass({
           onFocus={this._onFocus}
           onBlur={this._onBlur}
           onChange={this._onChange}
+          onContentSizeChange={onContentSizeChange}
           onSelectionChange={onSelectionChange}
           onTextInput={this._onTextInput}
           onSelectionChangeShouldSetResponder={emptyFunction.thatReturnsTrue}
@@ -599,6 +610,11 @@ const TextInput = React.createClass({
       };
     }
 
+    var onContentSizeChange;
+    if (this.props.onContentSizeChange) {
+      onContentSizeChange = this._onContentSizeChange;
+    }
+
     var autoCapitalize =
       UIManager.AndroidTextInput.Constants.AutoCapitalizationType[this.props.autoCapitalize];
     var children = this.props.children;
@@ -626,6 +642,7 @@ const TextInput = React.createClass({
         onFocus={this._onFocus}
         onBlur={this._onBlur}
         onChange={this._onChange}
+        onContentSizeChange={onContentSizeChange}
         onSelectionChange={onSelectionChange}
         onTextInput={this._onTextInput}
         onEndEditing={this.props.onEndEditing}
@@ -673,6 +690,12 @@ const TextInput = React.createClass({
     }
   },
 
+  _onContentSizeChange(event: Event) {
+    if (this.props.onContentSizeChange) {
+      this.props.onContentSizeChange(event.nativeEvent.contentSize);
+    }
+  },
+
   _onChange: function(event: Event) {
     // Make sure to fire the mostRecentEventCount first so it is already set on
     // native when the text value is set.

Libraries/Text/RCTTextView.h

@@ -29,6 +29,7 @@
 @property (nonatomic, strong) NSNumber *maxLength;
 
 @property (nonatomic, copy) RCTDirectEventBlock onChange;
+@property (nonatomic, copy) RCTDirectEventBlock onContentSizeChange;
 @property (nonatomic, copy) RCTDirectEventBlock onSelectionChange;
 @property (nonatomic, copy) RCTDirectEventBlock onTextInput;
 

Libraries/Text/RCTTextView.m

@@ -77,6 +77,9 @@ @implementation RCTTextView
   BOOL _blockTextShouldChange;
   BOOL _nativeUpdatesInFlight;
   NSInteger _nativeEventCount;
+
+  CGSize _previousContentSize;
+  BOOL _sendContentSizeUpdates;
 }
 
 - (instancetype)initWithEventDispatcher:(RCTEventDispatcher *)eventDispatcher
@@ -261,6 +264,17 @@ - (void)updateContentSize
   size.height = [_textView sizeThatFits:size].height;
   _scrollView.contentSize = size;
   _textView.frame = (CGRect){CGPointZero, size};
+
+  if (_sendContentSizeUpdates && _onContentSizeChange && !CGSizeEqualToSize(_previousContentSize, size)) {
+    _previousContentSize = size;
+    _onContentSizeChange(@{
+      @"contentSize": @{
+        @"height": @(size.height),
+        @"width": @(size.width),
+      },
+      @"target": self.reactTag,
+    });
+  }
 }
 
 - (void)updatePlaceholder
@@ -633,6 +647,11 @@ - (BOOL)resignFirstResponder
 - (void)layoutSubviews
 {
   [super layoutSubviews];
+
+  // Start sending content size updates only after the view has been layed out
+  // otherwise we send multiple events with bad dimentions on initial render.
+  _sendContentSizeUpdates = YES;
+
   [self updateFrames];
 }
 

Libraries/Text/RCTTextViewManager.m

@@ -35,6 +35,7 @@ - (UIView *)view
 RCT_REMAP_VIEW_PROPERTY(keyboardAppearance, textView.keyboardAppearance, UIKeyboardAppearance)
 RCT_EXPORT_VIEW_PROPERTY(maxLength, NSNumber)
 RCT_EXPORT_VIEW_PROPERTY(onChange, RCTBubblingEventBlock)
+RCT_EXPORT_VIEW_PROPERTY(onContentSizeChange, RCTBubblingEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(onSelectionChange, RCTDirectEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(onTextInput, RCTDirectEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(placeholder, NSString)

ReactAndroid/src/main/java/com/facebook/react/uimanager/UIManagerModuleConstants.java

@@ -71,11 +71,12 @@
 
   /* package */ static Map getDirectEventTypeConstants() {
     return MapBuilder.builder()
-        .put("topSelectionChange", MapBuilder.of("registrationName", "onSelectionChange"))
-        .put("topLoadingStart", MapBuilder.of("registrationName", "onLoadingStart"))
-        .put("topLoadingFinish", MapBuilder.of("registrationName", "onLoadingFinish"))
-        .put("topLoadingError", MapBuilder.of("registrationName", "onLoadingError"))
+        .put("topContentSizeChange", MapBuilder.of("registrationName", "onContentSizeChange"))
         .put("topLayout", MapBuilder.of("registrationName", "onLayout"))
+        .put("topLoadingError", MapBuilder.of("registrationName", "onLoadingError"))
+        .put("topLoadingFinish", MapBuilder.of("registrationName", "onLoadingFinish"))
+        .put("topLoadingStart", MapBuilder.of("registrationName", "onLoadingStart"))
+        .put("topSelectionChange", MapBuilder.of("registrationName", "onSelectionChange"))
         .build();
   }
 

ReactAndroid/src/main/java/com/facebook/react/views/recyclerview/RecyclerViewBackedScrollViewManager.java

@@ -85,9 +85,6 @@ public void scrollTo(
   Map getExportedCustomDirectEventTypeConstants() {
     return MapBuilder.builder()
         .put(ScrollEventType.SCROLL.getJSEventName(), MapBuilder.of("registrationName", "onScroll"))
-        .put(
-            ContentSizeChangeEvent.EVENT_NAME,
-            MapBuilder.of("registrationName", "onContentSizeChange"))
         .build();
   }
 }

ReactAndroid/src/main/java/com/facebook/react/views/textinput/ContentSizeWatcher.java

@@ -0,0 +1,14 @@
+/**
+ * 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.views.textinput;
+
+public interface ContentSizeWatcher {
+  public void onLayout();
+}

ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactContentSizeChangedEvent.java

@@ -0,0 +1,58 @@
+/**
+ * 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.views.textinput;
+
+import com.facebook.react.bridge.Arguments;
+import com.facebook.react.bridge.WritableMap;
+import com.facebook.react.uimanager.events.Event;
+import com.facebook.react.uimanager.events.RCTEventEmitter;
+
+/**
+ * Event emitted by EditText native view when content size changes.
+ */
+public class ReactContentSizeChangedEvent extends Event<ReactTextChangedEvent> {
+
+  public static final String EVENT_NAME = "topContentSizeChange";
+
+  private int mContentWidth;
+  private int mContentHeight;
+
+  public ReactContentSizeChangedEvent(
+    int viewId,
+    long timestampMs,
+    int contentSizeWidth,
+    int contentSizeHeight) {
+    super(viewId, timestampMs);
+    mContentWidth = contentSizeWidth;
+    mContentHeight = contentSizeHeight;
+  }
+
+  @Override
+  public String getEventName() {
+    return EVENT_NAME;
+  }
+
+  @Override
+  public void dispatch(RCTEventEmitter rctEventEmitter) {
+    rctEventEmitter.receiveEvent(getViewTag(), getEventName(), serializeEventData());
+  }
+
+  private WritableMap serializeEventData() {
+    WritableMap eventData = Arguments.createMap();
+
+    WritableMap contentSize = Arguments.createMap();
+    contentSize.putDouble("width", mContentWidth);
+    contentSize.putDouble("height", mContentHeight);
+    eventData.putMap("contentSize", contentSize);
+
+    eventData.putInt("target", getViewTag());
+    return eventData;
+  }
+}

ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactEditText.java

@@ -71,6 +71,7 @@ public class ReactEditText extends EditText {
   private boolean mContainsImages;
   private boolean mBlurOnSubmit;
   private @Nullable SelectionWatcher mSelectionWatcher;
+  private @Nullable ContentSizeWatcher mContentSizeWatcher;
   private final InternalKeyListener mKeyListener;
 
   private static final KeyListener sKeyListener = QwertyKeyListener.getInstanceForFullKeyboard();
@@ -102,7 +103,23 @@ public ReactEditText(Context context) {
   // TODO: t6408636 verify if we should schedule a layout after a View does a requestLayout()
   @Override
   public boolean isLayoutRequested() {
-    return false;
+    // If we are watching and updating container height based on content size
+    // then we don't want to scroll right away. This isn't perfect -- you might
+    // want to limit the height the text input can grow to. Possible solution
+    // is to add another prop that determines whether we should scroll to end
+    // of text.
+    if (mContentSizeWatcher != null) {
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  @Override
+  protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
+    if (mContentSizeWatcher != null) {
+      mContentSizeWatcher.onLayout();
+    }
   }
 
   // Consume 'Enter' key events: TextView tries to give focus to the next TextInput, but it can't
@@ -162,6 +179,10 @@ public void removeTextChangedListener(TextWatcher watcher) {
     }
   }
 
+  public void setContentSizeWatcher(ContentSizeWatcher contentSizeWatcher) {
+    mContentSizeWatcher = contentSizeWatcher;
+  }
+
   @Override
   protected void onSelectionChanged(int selStart, int selEnd) {
     super.onSelectionChanged(selStart, selEnd);
@@ -447,7 +468,7 @@ public void onTextChanged(CharSequence s, int start, int before, int count) {
     @Override
     public void afterTextChanged(Editable s) {
       if (!mIsSettingTextFromJS && mListeners != null) {
-        for (android.text.TextWatcher listener : mListeners) {
+        for (TextWatcher listener : mListeners) {
           listener.afterTextChanged(s);
         }
       }