iosWebViewFix/lib/src/in_app_webview.dart

import 'dart:async';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter/gestures.dart';

import 'context_menu.dart';
import 'webview.dart';
import 'types.dart';
import 'in_app_webview_controller.dart';

///List of forbidden names for JavaScript handlers.
const javaScriptHandlerForbiddenNames = [
  "onLoadResource",
  "shouldInterceptAjaxRequest",
  "onAjaxReadyStateChange",
  "onAjaxProgress",
  "shouldInterceptFetchRequest",
  "onPrint",
  "androidKeyboardWorkaroundFocusoutEvent"
];

///Flutter Widget for adding an **inline native WebView** integrated in the flutter widget tree.
class InAppWebView extends StatefulWidget implements WebView {
  /// `gestureRecognizers` specifies which gestures should be consumed by the web view.
  /// It is possible for other gesture recognizers to be competing with the web view on pointer
  /// events, e.g if the web view is inside a [ListView] the [ListView] will want to handle
  /// vertical drags. The web view will claim gestures that are recognized by any of the
  /// recognizers on this list.
  /// When `gestureRecognizers` is empty or null, the web view will only handle pointer events for gestures that
  /// were not claimed by any other gesture recognizer.
  final Set<Factory<OneSequenceGestureRecognizer>> gestureRecognizers;

  const InAppWebView({
    Key key,
    this.initialUrl = "about:blank",
    this.initialFile,
    this.initialData,
    this.initialHeaders = const {},
    @required this.initialOptions,
    this.contextMenu,
    this.onWebViewCreated,
    this.onLoadStart,
    this.onLoadStop,
    this.onLoadError,
    this.onLoadHttpError,
    this.onConsoleMessage,
    this.onProgressChanged,
    this.shouldOverrideUrlLoading,
    this.onLoadResource,
    this.onScrollChanged,
    this.onDownloadStart,
    this.onLoadResourceCustomScheme,
    this.onCreateWindow,
    this.onJsAlert,
    this.onJsConfirm,
    this.onJsPrompt,
    this.onReceivedHttpAuthRequest,
    this.onReceivedServerTrustAuthRequest,
    this.onReceivedClientCertRequest,
    this.onFindResultReceived,
    this.shouldInterceptAjaxRequest,
    this.onAjaxReadyStateChange,
    this.onAjaxProgress,
    this.shouldInterceptFetchRequest,
    this.onUpdateVisitedHistory,
    this.onPrint,
    this.onLongPressHitTestResult,
    this.androidOnSafeBrowsingHit,
    this.androidOnPermissionRequest,
    this.androidOnGeolocationPermissionsShowPrompt,
    this.androidOnGeolocationPermissionsHidePrompt,
    this.iosOnWebContentProcessDidTerminate,
    this.iosOnDidCommit,
    this.iosOnDidReceiveServerRedirectForProvisionalNavigation,
    this.gestureRecognizers,
  }) : super(key: key);

  @override
  _InAppWebViewState createState() => _InAppWebViewState();

  @override
  final Future<void> Function(InAppWebViewController controller)
      androidOnGeolocationPermissionsHidePrompt;

  @override
  final Future<GeolocationPermissionShowPromptResponse> Function(
          InAppWebViewController controller, String origin)
      androidOnGeolocationPermissionsShowPrompt;

  @override
  final Future<PermissionRequestResponse> Function(
      InAppWebViewController controller,
      String origin,
      List<String> resources) androidOnPermissionRequest;

  @override
  final Future<SafeBrowsingResponse> Function(InAppWebViewController controller,
      String url, SafeBrowsingThreat threatType) androidOnSafeBrowsingHit;

  @override
  final InAppWebViewInitialData initialData;

  @override
  final String initialFile;

  @override
  final Map<String, String> initialHeaders;

  @override
  final InAppWebViewGroupOptions initialOptions;

  @override
  final String initialUrl;

  @override
  final ContextMenu contextMenu;

  @override
  final Future<void> Function(InAppWebViewController controller) iosOnDidCommit;

  @override
  final Future<void> Function(InAppWebViewController controller)
      iosOnDidReceiveServerRedirectForProvisionalNavigation;

  @override
  final Future<void> Function(InAppWebViewController controller)
      iosOnWebContentProcessDidTerminate;

  @override
  final Future<AjaxRequestAction> Function(
          InAppWebViewController controller, AjaxRequest ajaxRequest)
      onAjaxProgress;

  @override
  final Future<AjaxRequestAction> Function(
          InAppWebViewController controller, AjaxRequest ajaxRequest)
      onAjaxReadyStateChange;

  @override
  final void Function(
          InAppWebViewController controller, ConsoleMessage consoleMessage)
      onConsoleMessage;

  @override
  final void Function(InAppWebViewController controller,
      OnCreateWindowRequest onCreateWindowRequest) onCreateWindow;

  @override
  final void Function(InAppWebViewController controller, String url)
      onDownloadStart;

  @override
  final void Function(InAppWebViewController controller, int activeMatchOrdinal,
      int numberOfMatches, bool isDoneCounting) onFindResultReceived;

  @override
  final Future<JsAlertResponse> Function(
      InAppWebViewController controller, String message) onJsAlert;

  @override
  final Future<JsConfirmResponse> Function(
      InAppWebViewController controller, String message) onJsConfirm;

  @override
  final Future<JsPromptResponse> Function(InAppWebViewController controller,
      String message, String defaultValue) onJsPrompt;

  @override
  final void Function(InAppWebViewController controller, String url, int code,
      String message) onLoadError;

  @override
  final void Function(InAppWebViewController controller, String url,
      int statusCode, String description) onLoadHttpError;

  @override
  final void Function(
          InAppWebViewController controller, LoadedResource resource)
      onLoadResource;

  @override
  final Future<CustomSchemeResponse> Function(
          InAppWebViewController controller, String scheme, String url)
      onLoadResourceCustomScheme;

  @override
  final void Function(InAppWebViewController controller, String url)
      onLoadStart;

  @override
  final void Function(InAppWebViewController controller, String url) onLoadStop;

  @override
  final void Function(InAppWebViewController controller,
      InAppWebViewHitTestResult hitTestResult) onLongPressHitTestResult;

  @override
  final void Function(InAppWebViewController controller, String url) onPrint;

  @override
  final void Function(InAppWebViewController controller, int progress)
      onProgressChanged;

  @override
  final Future<ClientCertResponse> Function(
          InAppWebViewController controller, ClientCertChallenge challenge)
      onReceivedClientCertRequest;

  @override
  final Future<HttpAuthResponse> Function(
          InAppWebViewController controller, HttpAuthChallenge challenge)
      onReceivedHttpAuthRequest;

  @override
  final Future<ServerTrustAuthResponse> Function(
          InAppWebViewController controller, ServerTrustChallenge challenge)
      onReceivedServerTrustAuthRequest;

  @override
  final void Function(InAppWebViewController controller, int x, int y)
      onScrollChanged;

  @override
  final void Function(
          InAppWebViewController controller, String url, bool androidIsReload)
      onUpdateVisitedHistory;

  @override
  final void Function(InAppWebViewController controller) onWebViewCreated;

  @override
  final Future<AjaxRequest> Function(
          InAppWebViewController controller, AjaxRequest ajaxRequest)
      shouldInterceptAjaxRequest;

  @override
  final Future<FetchRequest> Function(
          InAppWebViewController controller, FetchRequest fetchRequest)
      shouldInterceptFetchRequest;

  @override
  final Future<ShouldOverrideUrlLoadingAction> Function(
          InAppWebViewController controller,
          ShouldOverrideUrlLoadingRequest shouldOverrideUrlLoadingRequest)
      shouldOverrideUrlLoading;
}

class _InAppWebViewState extends State<InAppWebView> {
  InAppWebViewController _controller;

  @override
  Widget build(BuildContext context) {
    if (defaultTargetPlatform == TargetPlatform.android) {
      return AndroidView(
        viewType: 'com.pichillilorenzo/flutter_inappwebview',
        onPlatformViewCreated: _onPlatformViewCreated,
        gestureRecognizers: widget.gestureRecognizers,
        layoutDirection: TextDirection.rtl,
        creationParams: <String, dynamic>{
          'initialUrl': '${Uri.parse(widget.initialUrl)}',
          'initialFile': widget.initialFile,
          'initialData': widget.initialData?.toMap(),
          'initialHeaders': widget.initialHeaders,
          'initialOptions': widget.initialOptions?.toMap() ?? {},
          'contextMenu': widget.contextMenu?.toMap() ?? {}
        },
        creationParamsCodec: const StandardMessageCodec(),
      );
      // onLongPress issue: https://github.com/flutter/plugins/blob/f31d16a6ca0c4bd6849cff925a00b6823973696b/packages/webview_flutter/lib/src/webview_android.dart#L31
      /*return GestureDetector(
        onLongPress: () {},
        excludeFromSemantics: true,
        child: AndroidView(
          viewType: 'com.pichillilorenzo/flutter_inappwebview',
          onPlatformViewCreated: _onPlatformViewCreated,
          gestureRecognizers: widget.gestureRecognizers,
          layoutDirection: TextDirection.rtl,
          creationParams: <String, dynamic>{
            'initialUrl': '${Uri.parse(widget.initialUrl)}',
            'initialFile': widget.initialFile,
            'initialData': widget.initialData?.toMap(),
            'initialHeaders': widget.initialHeaders,
            'initialOptions': initialOptions
          },
          creationParamsCodec: const StandardMessageCodec(),
        ),
      );*/
    } else if (defaultTargetPlatform == TargetPlatform.iOS) {
      return UiKitView(
        viewType: 'com.pichillilorenzo/flutter_inappwebview',
        onPlatformViewCreated: _onPlatformViewCreated,
        gestureRecognizers: widget.gestureRecognizers,
        creationParams: <String, dynamic>{
          'initialUrl': '${Uri.parse(widget.initialUrl)}',
          'initialFile': widget.initialFile,
          'initialData': widget.initialData?.toMap(),
          'initialHeaders': widget.initialHeaders,
          'initialOptions': widget.initialOptions?.toMap() ?? {},
          'contextMenu': widget.contextMenu?.toMap() ?? {}
        },
        creationParamsCodec: const StandardMessageCodec(),
      );
    }
    return Text(
        '$defaultTargetPlatform is not yet supported by the flutter_inappwebview plugin');
  }

  @override
  void didUpdateWidget(InAppWebView oldWidget) {
    super.didUpdateWidget(oldWidget);
  }

  @override
  void dispose() {
    super.dispose();
  }

  void _onPlatformViewCreated(int id) {
    _controller = InAppWebViewController(id, widget);
    if (widget.onWebViewCreated != null) {
      widget.onWebViewCreated(_controller);
    }
  }
}