Add SwipeableFlatList

Reviewed By: sahrens

Differential Revision: D5912488

fbshipit-source-id: 3d2872a7712c00badcbd8341a7d058df14a9091a

Libraries/Experimental/SwipeableRow/SwipeableFlatList.js

@@ -0,0 +1,189 @@
+/**
+ * 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 SwipeableFlatList
+ * @flow
+ * @format
+ */
+'use strict';
+
+import type {Props as FlatListProps} from 'FlatList';
+import type {renderItemType} from 'VirtualizedList';
+
+const PropTypes = require('prop-types');
+const React = require('React');
+const SwipeableRow = require('SwipeableRow');
+const FlatList = require('FlatList');
+
+type SwipableListProps = {
+  /**
+   * To alert the user that swiping is possible, the first row can bounce
+   * on component mount.
+   */
+  bounceFirstRowOnMount: boolean,
+  // Maximum distance to open to after a swipe
+  maxSwipeDistance: number | (Object => number),
+  // Callback method to render the view that will be unveiled on swipe
+  renderQuickActions: renderItemType,
+};
+
+type Props<ItemT> = SwipableListProps & FlatListProps<ItemT>;
+
+type State = {
+  openRowKey: ?string,
+};
+
+/**
+ * A container component that renders multiple SwipeableRow's in a FlatList
+ * implementation. This is designed to be a drop-in replacement for the
+ * standard React Native `FlatList`, so use it as if it were a FlatList, but
+ * with extra props, i.e.
+ *
+ * <SwipeableListView renderRow={..} renderQuickActions={..} {..FlatList props} />
+ *
+ * SwipeableRow can be used independently of this component, but the main
+ * benefit of using this component is
+ *
+ * - It ensures that at most 1 row is swiped open (auto closes others)
+ * - It can bounce the 1st row of the list so users know it's swipeable
+ * - Increase performance on iOS by locking list swiping when row swiping is occuring
+ * - More to come
+ */
+
+class SwipeableFlatList<ItemT> extends React.Component<Props<ItemT>, State> {
+  props: Props<ItemT>;
+  state: State;
+
+  _flatListRef: ?FlatList<ItemT> = null;
+  _shouldBounceFirstRowOnMount: boolean = false;
+
+  static propTypes = {
+    ...FlatList.propTypes,
+
+    /**
+     * To alert the user that swiping is possible, the first row can bounce
+     * on component mount.
+     */
+    bounceFirstRowOnMount: PropTypes.bool.isRequired,
+
+    // Maximum distance to open to after a swipe
+    maxSwipeDistance: PropTypes.oneOfType([PropTypes.number, PropTypes.func])
+      .isRequired,
+
+    // Callback method to render the view that will be unveiled on swipe
+    renderQuickActions: PropTypes.func.isRequired,
+  };
+
+  static defaultProps = {
+    ...FlatList.defaultProps,
+    bounceFirstRowOnMount: true,
+    renderQuickActions: () => null,
+  };
+
+  constructor(props: Props<ItemT>, context: any): void {
+    super(props, context);
+    this.state = {
+      openRowKey: null,
+    };
+
+    this._shouldBounceFirstRowOnMount = this.props.bounceFirstRowOnMount;
+  }
+
+  render(): React.Node {
+    return (
+      <FlatList
+        {...this.props}
+        ref={ref => {
+          this._flatListRef = ref;
+        }}
+        onScroll={this._onScroll}
+        renderItem={this._renderItem}
+      />
+    );
+  }
+
+  _onScroll = (e): void => {
+    // Close any opens rows on ListView scroll
+    if (this.state.openRowKey) {
+      this.setState({
+        openRowKey: null,
+      });
+    }
+
+    this.props.onScroll && this.props.onScroll(e);
+  };
+
+  _renderItem = (info: Object): ?React.Element<any> => {
+    const slideoutView = this.props.renderQuickActions(info);
+    const key = this.props.keyExtractor(info.item, info.index);
+
+    // If renderQuickActions is unspecified or returns falsey, don't allow swipe
+    if (!slideoutView) {
+      return this.props.renderItem(info);
+    }
+
+    let shouldBounceOnMount = false;
+    if (this._shouldBounceFirstRowOnMount) {
+      this._shouldBounceFirstRowOnMount = false;
+      shouldBounceOnMount = true;
+    }
+
+    return (
+      <SwipeableRow
+        slideoutView={slideoutView}
+        isOpen={key === this.state.openRowKey}
+        maxSwipeDistance={this._getMaxSwipeDistance(info)}
+        onOpen={() => this._onOpen(key)}
+        onClose={() => this._onClose(key)}
+        shouldBounceOnMount={shouldBounceOnMount}
+        onSwipeEnd={this._setListViewScrollable}
+        onSwipeStart={this._setListViewNotScrollable}>
+        {this.props.renderItem(info)}
+      </SwipeableRow>
+    );
+  };
+
+  // This enables rows having variable width slideoutView.
+  _getMaxSwipeDistance(info: Object): number {
+    if (typeof this.props.maxSwipeDistance === 'function') {
+      return this.props.maxSwipeDistance(info);
+    }
+
+    return this.props.maxSwipeDistance;
+  }
+
+  _setListViewScrollableTo(value: boolean) {
+    if (this._flatListRef) {
+      this._flatListRef.setNativeProps({
+        scrollEnabled: value,
+      });
+    }
+  }
+
+  _setListViewScrollable = () => {
+    this._setListViewScrollableTo(true);
+  };
+
+  _setListViewNotScrollable = () => {
+    this._setListViewScrollableTo(false);
+  };
+
+  _onOpen(key: any): void {
+    this.setState({
+      openRowKey: key,
+    });
+  }
+
+  _onClose(key: any): void {
+    this.setState({
+      openRowKey: null,
+    });
+  }
+}
+
+module.exports = SwipeableFlatList;

Libraries/Lists/FlatList.js

@@ -201,15 +201,15 @@ type OptionalProps<ItemT> = {
    */
   viewabilityConfigCallbackPairs?: Array<ViewabilityConfigCallbackPair>,
 };
-type Props<ItemT> = RequiredProps<ItemT> &
+export type Props<ItemT> = RequiredProps<ItemT> &
   OptionalProps<ItemT> &
   VirtualizedListProps;
 
 const defaultProps = {
   ...VirtualizedList.defaultProps,
   numColumns: 1,
 };
-type DefaultProps = typeof defaultProps;
+export type DefaultProps = typeof defaultProps;
 
 /**
  * A performant interface for rendering simple, flat lists, supporting the most handy features:

Libraries/Lists/VirtualizedList.js

@@ -42,7 +42,7 @@ import type {
 
 type Item = any;
 
-type renderItemType = (info: any) => ?React.Element<any>;
+export type renderItemType = (info: any) => ?React.Element<any>;
 
 type ViewabilityHelperCallbackTuple = {
   viewabilityHelper: ViewabilityHelper,

Libraries/react-native/react-native-implementation.js

@@ -46,6 +46,7 @@ const ReactNative = {
   get Switch() { return require('Switch'); },
   get RefreshControl() { return require('RefreshControl'); },
   get StatusBar() { return require('StatusBar'); },
+  get SwipeableFlatList() { return require('SwipeableFlatList'); },
   get SwipeableListView() { return require('SwipeableListView'); },
   get TabBarIOS() { return require('TabBarIOS'); },
   get Text() { return require('Text'); },

RNTester/js/RNTesterList.android.js

@@ -85,6 +85,10 @@ const ComponentExamples: Array<RNTesterExample> = [
     key: 'StatusBarExample',
     module: require('./StatusBarExample'),
   },
+  {
+    key: 'SwipeableFlatListExample',
+    module: require('./SwipeableFlatListExample')
+  },
   {
     key: 'SwipeableListViewExample',
     module: require('./SwipeableListViewExample')

RNTester/js/RNTesterList.ios.js

@@ -153,6 +153,11 @@ const ComponentExamples: Array<RNTesterExample> = [
     module: require('./StatusBarExample'),
     supportsTVOS: false,
   },
+  {
+    key: 'SwipeableFlatListExample',
+    module: require('./SwipeableFlatListExample'),
+    supportsTVOS: false,
+  },
   {
     key: 'SwipeableListViewExample',
     module: require('./SwipeableListViewExample'),

RNTester/js/SwipeableFlatListExample.js

@@ -0,0 +1,151 @@
+/**
+ * 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 SwipeableFlatListExample
+ * @flow
+ * @format
+ */
+'use strict';
+
+const React = require('react');
+const createReactClass = require('create-react-class');
+const ReactNative = require('react-native');
+const {
+  Image,
+  SwipeableFlatList,
+  TouchableHighlight,
+  StyleSheet,
+  Text,
+  View,
+  Alert,
+} = ReactNative;
+
+const RNTesterPage = require('./RNTesterPage');
+
+const data = [
+  {
+    key: 'like',
+    icon: require('./Thumbnails/like.png'),
+    data: 'Like!',
+  },
+  {
+    key: 'heart',
+    icon: require('./Thumbnails/heart.png'),
+    data: 'Heart!',
+  },
+  {
+    key: 'party',
+    icon: require('./Thumbnails/party.png'),
+    data: 'Party!',
+  },
+];
+
+const SwipeableFlatListExample = createReactClass({
+  displayName: 'SwipeableFlatListExample',
+  statics: {
+    title: '<SwipeableFlatList>',
+    description: 'Performant, scrollable, swipeable list of data.',
+  },
+
+  render: function() {
+    return (
+      <RNTesterPage
+        title={this.props.navigator ? null : '<SwipeableListView>'}
+        noSpacer={true}
+        noScroll={true}>
+        <SwipeableFlatList
+          data={data}
+          bounceFirstRowOnMount={true}
+          maxSwipeDistance={160}
+          renderItem={this._renderItem.bind(this)}
+          renderQuickActions={this._renderQuickActions.bind(this)}
+        />
+      </RNTesterPage>
+    );
+  },
+
+  _renderItem: function({item}): ?React.Element<any> {
+    return (
+      <View style={styles.row}>
+        <Image style={styles.rowIcon} source={item.icon} />
+        <View style={styles.rowData}>
+          <Text style={styles.rowDataText}>
+            {item.data}
+          </Text>
+        </View>
+      </View>
+    );
+  },
+
+  _renderQuickActions: function({item}: Object): ?React.Element<any> {
+    return (
+      <View style={styles.actionsContainer}>
+        <TouchableHighlight
+          style={styles.actionButton}
+          onPress={() => {
+            Alert.alert(
+              'Tips',
+              'You could do something with this edit action!',
+            );
+          }}>
+          <Text style={styles.actionButtonText}>Edit</Text>
+        </TouchableHighlight>
+        <TouchableHighlight
+          style={[styles.actionButton, styles.actionButtonDestructive]}
+          onPress={() => {
+            Alert.alert(
+              'Tips',
+              'You could do something with this remove action!',
+            );
+          }}>
+          <Text style={styles.actionButtonText}>Remove</Text>
+        </TouchableHighlight>
+      </View>
+    );
+  },
+});
+
+var styles = StyleSheet.create({
+  row: {
+    flexDirection: 'row',
+    justifyContent: 'center',
+    alignItems: 'center',
+    padding: 10,
+    backgroundColor: '#F6F6F6',
+  },
+  rowIcon: {
+    width: 64,
+    height: 64,
+    marginRight: 20,
+  },
+  rowData: {
+    flex: 1,
+  },
+  rowDataText: {
+    fontSize: 24,
+  },
+  actionsContainer: {
+    flex: 1,
+    flexDirection: 'row',
+    justifyContent: 'flex-end',
+    alignItems: 'center',
+  },
+  actionButton: {
+    padding: 10,
+    width: 80,
+    backgroundColor: '#999999',
+  },
+  actionButtonDestructive: {
+    backgroundColor: '#FF0000',
+  },
+  actionButtonText: {
+    textAlign: 'center',
+  },
+});
+
+module.exports = SwipeableFlatListExample;