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WebView.ios.js 14KB

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  1. /**
  2. * Copyright (c) 2015-present, Facebook, Inc.
  3. *
  4. * This source code is licensed under the MIT license found in the
  5. * LICENSE file in the root directory of this source tree.
  6. *
  7. * @format
  8. * @flow
  9. */
  10. import React from 'react';
  11. import {
  12. ActivityIndicator,
  13. Linking,
  14. StyleSheet,
  15. Text,
  16. UIManager,
  17. View,
  18. requireNativeComponent,
  19. NativeModules,
  20. Image,
  21. findNodeHandle,
  22. } from 'react-native';
  23. import invariant from 'fbjs/lib/invariant';
  24. import keyMirror from 'fbjs/lib/keyMirror';
  25. import {
  26. defaultOriginWhitelist,
  27. createOnShouldStartLoadWithRequest,
  28. } from './WebViewShared';
  29. import type {
  30. WebViewEvent,
  31. WebViewError,
  32. WebViewErrorEvent,
  33. WebViewMessageEvent,
  34. WebViewNavigationEvent,
  35. WebViewSharedProps,
  36. WebViewSource,
  37. WebViewProgressEvent,
  38. } from './WebViewTypes';
  39. const resolveAssetSource = Image.resolveAssetSource;
  40. let didWarnAboutUIWebViewUsage = false;
  41. // Imported from https://github.com/facebook/react-native/blob/master/Libraries/Components/ScrollView/processDecelerationRate.js
  42. function processDecelerationRate(decelerationRate) {
  43. if (decelerationRate === 'normal') {
  44. decelerationRate = 0.998;
  45. } else if (decelerationRate === 'fast') {
  46. decelerationRate = 0.99;
  47. }
  48. return decelerationRate;
  49. }
  50. const RNCUIWebViewManager = NativeModules.RNCUIWebViewManager;
  51. const RNCWKWebViewManager = NativeModules.RNCWKWebViewManager;
  52. const BGWASH = 'rgba(255,255,255,0.8)';
  53. const WebViewState = keyMirror({
  54. IDLE: null,
  55. LOADING: null,
  56. ERROR: null,
  57. });
  58. const NavigationType = keyMirror({
  59. click: true,
  60. formsubmit: true,
  61. backforward: true,
  62. reload: true,
  63. formresubmit: true,
  64. other: true,
  65. });
  66. const JSNavigationScheme = 'react-js-navigation';
  67. type State = {|
  68. viewState: WebViewState,
  69. lastErrorEvent: ?WebViewError,
  70. |};
  71. const DataDetectorTypes = [
  72. 'phoneNumber',
  73. 'link',
  74. 'address',
  75. 'calendarEvent',
  76. 'trackingNumber',
  77. 'flightNumber',
  78. 'lookupSuggestion',
  79. 'none',
  80. 'all',
  81. ];
  82. const defaultRenderLoading = () => (
  83. <View style={styles.loadingView}>
  84. <ActivityIndicator />
  85. </View>
  86. );
  87. const defaultRenderError = (errorDomain, errorCode, errorDesc) => (
  88. <View style={styles.errorContainer}>
  89. <Text style={styles.errorTextTitle}>Error loading page</Text>
  90. <Text style={styles.errorText}>{'Domain: ' + errorDomain}</Text>
  91. <Text style={styles.errorText}>{'Error Code: ' + errorCode}</Text>
  92. <Text style={styles.errorText}>{'Description: ' + errorDesc}</Text>
  93. </View>
  94. );
  95. /**
  96. * `WebView` renders web content in a native view.
  97. *
  98. *```
  99. * import React, { Component } from 'react';
  100. * import { WebView } from 'react-native';
  101. *
  102. * class MyWeb extends Component {
  103. * render() {
  104. * return (
  105. * <WebView
  106. * source={{uri: 'https://github.com/facebook/react-native'}}
  107. * style={{marginTop: 20}}
  108. * />
  109. * );
  110. * }
  111. * }
  112. *```
  113. *
  114. * You can use this component to navigate back and forth in the web view's
  115. * history and configure various properties for the web content.
  116. */
  117. class WebView extends React.Component<WebViewSharedProps, State> {
  118. static JSNavigationScheme = JSNavigationScheme;
  119. static NavigationType = NavigationType;
  120. static defaultProps = {
  121. useWebKit: true,
  122. cacheEnabled: true,
  123. originWhitelist: defaultOriginWhitelist,
  124. useSharedProcessPool: true,
  125. };
  126. static isFileUploadSupported = async () => {
  127. // no native implementation for iOS, depends only on permissions
  128. return true;
  129. };
  130. state = {
  131. viewState: this.props.startInLoadingState
  132. ? WebViewState.LOADING
  133. : WebViewState.IDLE,
  134. lastErrorEvent: null,
  135. };
  136. webViewRef = React.createRef();
  137. UNSAFE_componentWillMount() {
  138. if (!this.props.useWebKit && !didWarnAboutUIWebViewUsage) {
  139. didWarnAboutUIWebViewUsage = true;
  140. console.warn(
  141. 'UIWebView is deprecated and will be removed soon, please use WKWebView (do not override useWebkit={true} prop),' +
  142. ' more infos here: https://github.com/react-native-community/react-native-webview/issues/312',
  143. );
  144. }
  145. if (
  146. this.props.useWebKit === true &&
  147. this.props.scalesPageToFit !== undefined
  148. ) {
  149. console.warn(
  150. 'The scalesPageToFit property is not supported when useWebKit = true',
  151. );
  152. }
  153. if (
  154. !this.props.useWebKit &&
  155. this.props.allowsBackForwardNavigationGestures
  156. ) {
  157. console.warn(
  158. 'The allowsBackForwardNavigationGestures property is not supported when useWebKit = false',
  159. );
  160. }
  161. if (!this.props.useWebKit && this.props.incognito) {
  162. console.warn(
  163. 'The incognito property is not supported when useWebKit = false',
  164. );
  165. }
  166. }
  167. render() {
  168. let otherView = null;
  169. let scalesPageToFit;
  170. if (this.props.useWebKit) {
  171. ({ scalesPageToFit } = this.props);
  172. } else {
  173. ({ scalesPageToFit = true } = this.props);
  174. }
  175. if (this.state.viewState === WebViewState.LOADING) {
  176. otherView = (this.props.renderLoading || defaultRenderLoading)();
  177. } else if (this.state.viewState === WebViewState.ERROR) {
  178. const errorEvent = this.state.lastErrorEvent;
  179. invariant(errorEvent != null, 'lastErrorEvent expected to be non-null');
  180. otherView = (this.props.renderError || defaultRenderError)(
  181. errorEvent.domain,
  182. errorEvent.code,
  183. errorEvent.description,
  184. );
  185. } else if (this.state.viewState !== WebViewState.IDLE) {
  186. console.error(
  187. 'RNCWebView invalid state encountered: ' + this.state.viewState,
  188. );
  189. }
  190. const webViewStyles = [styles.container, styles.webView, this.props.style];
  191. if (
  192. this.state.viewState === WebViewState.LOADING ||
  193. this.state.viewState === WebViewState.ERROR
  194. ) {
  195. // if we're in either LOADING or ERROR states, don't show the webView
  196. webViewStyles.push(styles.hidden);
  197. }
  198. const nativeConfig = this.props.nativeConfig || {};
  199. const onShouldStartLoadWithRequest = createOnShouldStartLoadWithRequest(
  200. this.onShouldStartLoadWithRequestCallback,
  201. this.props.originWhitelist,
  202. this.props.onShouldStartLoadWithRequest,
  203. );
  204. const decelerationRate = processDecelerationRate(
  205. this.props.decelerationRate,
  206. );
  207. let source: WebViewSource = this.props.source || {};
  208. if (!this.props.source && this.props.html) {
  209. source = { html: this.props.html };
  210. } else if (!this.props.source && this.props.url) {
  211. source = { uri: this.props.url };
  212. }
  213. let NativeWebView = nativeConfig.component;
  214. if (this.props.useWebKit) {
  215. NativeWebView = NativeWebView || RNCWKWebView;
  216. } else {
  217. NativeWebView = NativeWebView || RNCUIWebView;
  218. }
  219. const webView = (
  220. <NativeWebView
  221. ref={this.webViewRef}
  222. key="webViewKey"
  223. style={webViewStyles}
  224. source={resolveAssetSource(source)}
  225. injectedJavaScript={this.props.injectedJavaScript}
  226. bounces={this.props.bounces}
  227. scrollEnabled={this.props.scrollEnabled}
  228. pagingEnabled={this.props.pagingEnabled}
  229. cacheEnabled={this.props.cacheEnabled}
  230. decelerationRate={decelerationRate}
  231. contentInset={this.props.contentInset}
  232. automaticallyAdjustContentInsets={
  233. this.props.automaticallyAdjustContentInsets
  234. }
  235. hideKeyboardAccessoryView={this.props.hideKeyboardAccessoryView}
  236. allowsBackForwardNavigationGestures={
  237. this.props.allowsBackForwardNavigationGestures
  238. }
  239. incognito={this.props.incognito}
  240. userAgent={this.props.userAgent}
  241. onLoadingStart={this._onLoadingStart}
  242. onLoadingFinish={this._onLoadingFinish}
  243. onLoadingError={this._onLoadingError}
  244. onLoadingProgress={this._onLoadingProgress}
  245. onMessage={this._onMessage}
  246. messagingEnabled={typeof this.props.onMessage === 'function'}
  247. onShouldStartLoadWithRequest={onShouldStartLoadWithRequest}
  248. scalesPageToFit={scalesPageToFit}
  249. allowsInlineMediaPlayback={this.props.allowsInlineMediaPlayback}
  250. mediaPlaybackRequiresUserAction={
  251. this.props.mediaPlaybackRequiresUserAction
  252. }
  253. dataDetectorTypes={this.props.dataDetectorTypes}
  254. useSharedProcessPool={this.props.useSharedProcessPool}
  255. allowsLinkPreview={this.props.allowsLinkPreview}
  256. showsHorizontalScrollIndicator={this.props.showsHorizontalScrollIndicator}
  257. showsVerticalScrollIndicator={this.props.showsVerticalScrollIndicator}
  258. {...nativeConfig.props}
  259. />
  260. );
  261. return (
  262. <View style={styles.container}>
  263. {webView}
  264. {otherView}
  265. </View>
  266. );
  267. }
  268. _getViewManagerConfig = (viewManagerName: string) => {
  269. if (!UIManager.getViewManagerConfig) {
  270. return UIManager[viewManagerName];
  271. }
  272. return UIManager.getViewManagerConfig(viewManagerName);
  273. };
  274. _getCommands = () =>
  275. !this.props.useWebKit
  276. ? this._getViewManagerConfig('RNCUIWebView').Commands
  277. : this._getViewManagerConfig('RNCWKWebView').Commands;
  278. /**
  279. * Go forward one page in the web view's history.
  280. */
  281. goForward = () => {
  282. UIManager.dispatchViewManagerCommand(
  283. this.getWebViewHandle(),
  284. this._getCommands().goForward,
  285. null,
  286. );
  287. };
  288. /**
  289. * Go back one page in the web view's history.
  290. */
  291. goBack = () => {
  292. UIManager.dispatchViewManagerCommand(
  293. this.getWebViewHandle(),
  294. this._getCommands().goBack,
  295. null,
  296. );
  297. };
  298. /**
  299. * Reloads the current page.
  300. */
  301. reload = () => {
  302. this.setState({ viewState: WebViewState.LOADING });
  303. UIManager.dispatchViewManagerCommand(
  304. this.getWebViewHandle(),
  305. this._getCommands().reload,
  306. null,
  307. );
  308. };
  309. /**
  310. * Stop loading the current page.
  311. */
  312. stopLoading = () => {
  313. UIManager.dispatchViewManagerCommand(
  314. this.getWebViewHandle(),
  315. this._getCommands().stopLoading,
  316. null,
  317. );
  318. };
  319. /**
  320. * Posts a message to the web view, which will emit a `message` event.
  321. * Accepts one argument, `data`, which must be a string.
  322. *
  323. * In your webview, you'll need to something like the following.
  324. *
  325. * ```js
  326. * document.addEventListener('message', e => { document.title = e.data; });
  327. * ```
  328. */
  329. postMessage = (data: string) => {
  330. UIManager.dispatchViewManagerCommand(
  331. this.getWebViewHandle(),
  332. this._getCommands().postMessage,
  333. [String(data)],
  334. );
  335. };
  336. /**
  337. * Injects a javascript string into the referenced WebView. Deliberately does not
  338. * return a response because using eval() to return a response breaks this method
  339. * on pages with a Content Security Policy that disallows eval(). If you need that
  340. * functionality, look into postMessage/onMessage.
  341. */
  342. injectJavaScript = (data: string) => {
  343. UIManager.dispatchViewManagerCommand(
  344. this.getWebViewHandle(),
  345. this._getCommands().injectJavaScript,
  346. [data],
  347. );
  348. };
  349. /**
  350. * We return an event with a bunch of fields including:
  351. * url, title, loading, canGoBack, canGoForward
  352. */
  353. _updateNavigationState = (event: WebViewNavigationEvent) => {
  354. if (this.props.onNavigationStateChange) {
  355. this.props.onNavigationStateChange(event.nativeEvent);
  356. }
  357. };
  358. /**
  359. * Returns the native `WebView` node.
  360. */
  361. getWebViewHandle = () => {
  362. return findNodeHandle(this.webViewRef.current);
  363. };
  364. _onLoadingStart = (event: WebViewNavigationEvent) => {
  365. const onLoadStart = this.props.onLoadStart;
  366. onLoadStart && onLoadStart(event);
  367. this._updateNavigationState(event);
  368. };
  369. _onLoadingError = (event: WebViewErrorEvent) => {
  370. event.persist(); // persist this event because we need to store it
  371. const { onError, onLoadEnd } = this.props;
  372. onError && onError(event);
  373. onLoadEnd && onLoadEnd(event);
  374. console.warn('Encountered an error loading page', event.nativeEvent);
  375. this.setState({
  376. lastErrorEvent: event.nativeEvent,
  377. viewState: WebViewState.ERROR,
  378. });
  379. };
  380. _onLoadingFinish = (event: WebViewNavigationEvent) => {
  381. const { onLoad, onLoadEnd } = this.props;
  382. onLoad && onLoad(event);
  383. onLoadEnd && onLoadEnd(event);
  384. this.setState({
  385. viewState: WebViewState.IDLE,
  386. });
  387. this._updateNavigationState(event);
  388. };
  389. _onMessage = (event: WebViewMessageEvent) => {
  390. const { onMessage } = this.props;
  391. onMessage && onMessage(event);
  392. };
  393. _onLoadingProgress = (event: WebViewProgressEvent) => {
  394. const { onLoadProgress } = this.props;
  395. onLoadProgress && onLoadProgress(event);
  396. };
  397. onShouldStartLoadWithRequestCallback = (
  398. shouldStart: boolean,
  399. url: string,
  400. lockIdentifier: number,
  401. ) => {
  402. let viewManager = (this.props.nativeConfig || {}).viewManager;
  403. if (this.props.useWebKit) {
  404. viewManager = viewManager || RNCWKWebViewManager;
  405. } else {
  406. viewManager = viewManager || RNCUIWebViewManager;
  407. }
  408. invariant(viewManager != null, 'viewManager expected to be non-null');
  409. viewManager.startLoadWithResult(!!shouldStart, lockIdentifier);
  410. };
  411. componentDidUpdate(prevProps: WebViewSharedProps) {
  412. if (!(prevProps.useWebKit && this.props.useWebKit)) {
  413. return;
  414. }
  415. this._showRedboxOnPropChanges(prevProps, 'allowsInlineMediaPlayback');
  416. this._showRedboxOnPropChanges(prevProps, 'incognito');
  417. this._showRedboxOnPropChanges(prevProps, 'mediaPlaybackRequiresUserAction');
  418. this._showRedboxOnPropChanges(prevProps, 'dataDetectorTypes');
  419. if (this.props.scalesPageToFit !== undefined) {
  420. console.warn(
  421. 'The scalesPageToFit property is not supported when useWebKit = true',
  422. );
  423. }
  424. }
  425. _showRedboxOnPropChanges(prevProps, propName: string) {
  426. if (this.props[propName] !== prevProps[propName]) {
  427. console.error(
  428. `Changes to property ${propName} do nothing after the initial render.`,
  429. );
  430. }
  431. }
  432. }
  433. const RNCUIWebView = requireNativeComponent('RNCUIWebView');
  434. const RNCWKWebView = requireNativeComponent('RNCWKWebView');
  435. const styles = StyleSheet.create({
  436. container: {
  437. flex: 1,
  438. },
  439. errorContainer: {
  440. flex: 1,
  441. justifyContent: 'center',
  442. alignItems: 'center',
  443. backgroundColor: BGWASH,
  444. },
  445. errorText: {
  446. fontSize: 14,
  447. textAlign: 'center',
  448. marginBottom: 2,
  449. },
  450. errorTextTitle: {
  451. fontSize: 15,
  452. fontWeight: '500',
  453. marginBottom: 10,
  454. },
  455. hidden: {
  456. height: 0,
  457. flex: 0, // disable 'flex:1' when hiding a View
  458. },
  459. loadingView: {
  460. backgroundColor: BGWASH,
  461. flex: 1,
  462. justifyContent: 'center',
  463. alignItems: 'center',
  464. height: 100,
  465. },
  466. webView: {
  467. backgroundColor: '#ffffff',
  468. },
  469. });
  470. module.exports = WebView;