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webview_flutter_test.dart
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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:math';
import 'dart:typed_data';
import 'package:flutter/services.dart';
import 'package:flutter/src/foundation/basic_types.dart';
import 'package:flutter/src/gestures/recognizer.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:webview_flutter/platform_interface.dart';
import 'package:webview_flutter/webview_flutter.dart';
typedef void VoidCallback();
void main() {
TestWidgetsFlutterBinding.ensureInitialized();
final _FakePlatformViewsController fakePlatformViewsController =
_FakePlatformViewsController();
final _FakeCookieManager _fakeCookieManager = _FakeCookieManager();
setUpAll(() {
SystemChannels.platform_views.setMockMethodCallHandler(
fakePlatformViewsController.fakePlatformViewsMethodHandler);
SystemChannels.platform
.setMockMethodCallHandler(_fakeCookieManager.onMethodCall);
});
setUp(() {
fakePlatformViewsController.reset();
_fakeCookieManager.reset();
});
testWidgets('Create WebView', (WidgetTester tester) async {
await tester.pumpWidget(const WebView());
});
testWidgets('Initial url', (WidgetTester tester) async {
late WebViewController controller;
await tester.pumpWidget(
WebView(
initialUrl: 'https://youtube.com',
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(await controller.currentUrl(), 'https://youtube.com');
});
testWidgets('Javascript mode', (WidgetTester tester) async {
await tester.pumpWidget(const WebView(
initialUrl: 'https://youtube.com',
javascriptMode: JavascriptMode.unrestricted,
));
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
expect(platformWebView.javascriptMode, JavascriptMode.unrestricted);
await tester.pumpWidget(const WebView(
initialUrl: 'https://youtube.com',
javascriptMode: JavascriptMode.disabled,
));
expect(platformWebView.javascriptMode, JavascriptMode.disabled);
});
testWidgets('Load url', (WidgetTester tester) async {
WebViewController? controller;
await tester.pumpWidget(
WebView(
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(controller, isNotNull);
await controller!.loadUrl('https://flutter.io');
expect(await controller!.currentUrl(), 'https://flutter.io');
});
testWidgets('Invalid urls', (WidgetTester tester) async {
WebViewController? controller;
await tester.pumpWidget(
WebView(
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(controller, isNotNull);
expect(await controller!.currentUrl(), isNull);
expect(() => controller!.loadUrl(''), throwsA(anything));
expect(await controller!.currentUrl(), isNull);
// Missing schema.
expect(() => controller!.loadUrl('flutter.io'), throwsA(anything));
expect(await controller!.currentUrl(), isNull);
});
testWidgets('Headers in loadUrl', (WidgetTester tester) async {
WebViewController? controller;
await tester.pumpWidget(
WebView(
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(controller, isNotNull);
final Map<String, String> headers = <String, String>{
'CACHE-CONTROL': 'ABC'
};
await controller!.loadUrl('https://flutter.io', headers: headers);
expect(await controller!.currentUrl(), equals('https://flutter.io'));
});
testWidgets("Can't go back before loading a page",
(WidgetTester tester) async {
WebViewController? controller;
await tester.pumpWidget(
WebView(
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(controller, isNotNull);
final bool canGoBackNoPageLoaded = await controller!.canGoBack();
expect(canGoBackNoPageLoaded, false);
});
testWidgets("Clear Cache", (WidgetTester tester) async {
WebViewController? controller;
await tester.pumpWidget(
WebView(
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(controller, isNotNull);
expect(fakePlatformViewsController.lastCreatedView!.hasCache, true);
await controller!.clearCache();
expect(fakePlatformViewsController.lastCreatedView!.hasCache, false);
});
testWidgets("Can't go back with no history", (WidgetTester tester) async {
WebViewController? controller;
await tester.pumpWidget(
WebView(
initialUrl: 'https://flutter.io',
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(controller, isNotNull);
final bool canGoBackFirstPageLoaded = await controller!.canGoBack();
expect(canGoBackFirstPageLoaded, false);
});
testWidgets('Can go back', (WidgetTester tester) async {
WebViewController? controller;
await tester.pumpWidget(
WebView(
initialUrl: 'https://flutter.io',
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(controller, isNotNull);
await controller!.loadUrl('https://www.google.com');
final bool canGoBackSecondPageLoaded = await controller!.canGoBack();
expect(canGoBackSecondPageLoaded, true);
});
testWidgets("Can't go forward before loading a page",
(WidgetTester tester) async {
WebViewController? controller;
await tester.pumpWidget(
WebView(
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(controller, isNotNull);
final bool canGoForwardNoPageLoaded = await controller!.canGoForward();
expect(canGoForwardNoPageLoaded, false);
});
testWidgets("Can't go forward with no history", (WidgetTester tester) async {
WebViewController? controller;
await tester.pumpWidget(
WebView(
initialUrl: 'https://flutter.io',
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(controller, isNotNull);
final bool canGoForwardFirstPageLoaded = await controller!.canGoForward();
expect(canGoForwardFirstPageLoaded, false);
});
testWidgets('Can go forward', (WidgetTester tester) async {
WebViewController? controller;
await tester.pumpWidget(
WebView(
initialUrl: 'https://flutter.io',
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(controller, isNotNull);
await controller!.loadUrl('https://youtube.com');
await controller!.goBack();
final bool canGoForwardFirstPageBacked = await controller!.canGoForward();
expect(canGoForwardFirstPageBacked, true);
});
testWidgets('Go back', (WidgetTester tester) async {
WebViewController? controller;
await tester.pumpWidget(
WebView(
initialUrl: 'https://youtube.com',
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(controller, isNotNull);
expect(await controller!.currentUrl(), 'https://youtube.com');
await controller!.loadUrl('https://flutter.io');
expect(await controller!.currentUrl(), 'https://flutter.io');
await controller!.goBack();
expect(await controller!.currentUrl(), 'https://youtube.com');
});
testWidgets('Go forward', (WidgetTester tester) async {
WebViewController? controller;
await tester.pumpWidget(
WebView(
initialUrl: 'https://youtube.com',
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(controller, isNotNull);
expect(await controller!.currentUrl(), 'https://youtube.com');
await controller!.loadUrl('https://flutter.io');
expect(await controller!.currentUrl(), 'https://flutter.io');
await controller!.goBack();
expect(await controller!.currentUrl(), 'https://youtube.com');
await controller!.goForward();
expect(await controller!.currentUrl(), 'https://flutter.io');
});
testWidgets('Current URL', (WidgetTester tester) async {
WebViewController? controller;
await tester.pumpWidget(
WebView(
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(controller, isNotNull);
// Test a WebView without an explicitly set first URL.
expect(await controller!.currentUrl(), isNull);
await controller!.loadUrl('https://youtube.com');
expect(await controller!.currentUrl(), 'https://youtube.com');
await controller!.loadUrl('https://flutter.io');
expect(await controller!.currentUrl(), 'https://flutter.io');
await controller!.goBack();
expect(await controller!.currentUrl(), 'https://youtube.com');
});
testWidgets('Reload url', (WidgetTester tester) async {
late WebViewController controller;
await tester.pumpWidget(
WebView(
initialUrl: 'https://flutter.io',
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
expect(platformWebView.currentUrl, 'https://flutter.io');
expect(platformWebView.amountOfReloadsOnCurrentUrl, 0);
await controller.reload();
expect(platformWebView.currentUrl, 'https://flutter.io');
expect(platformWebView.amountOfReloadsOnCurrentUrl, 1);
await controller.loadUrl('https://youtube.com');
expect(platformWebView.amountOfReloadsOnCurrentUrl, 0);
});
testWidgets('evaluate Javascript', (WidgetTester tester) async {
late WebViewController controller;
await tester.pumpWidget(
WebView(
initialUrl: 'https://flutter.io',
javascriptMode: JavascriptMode.unrestricted,
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(
await controller.evaluateJavascript("fake js string"), "fake js string",
reason: 'should get the argument');
});
testWidgets('evaluate Javascript with JavascriptMode disabled',
(WidgetTester tester) async {
late WebViewController controller;
await tester.pumpWidget(
WebView(
initialUrl: 'https://flutter.io',
javascriptMode: JavascriptMode.disabled,
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
expect(
() => controller.evaluateJavascript('fake js string'),
throwsA(anything),
);
});
testWidgets('Cookies can be cleared once', (WidgetTester tester) async {
await tester.pumpWidget(
const WebView(
initialUrl: 'https://flutter.io',
),
);
final CookieManager cookieManager = CookieManager();
final bool hasCookies = await cookieManager.clearCookies();
expect(hasCookies, true);
});
testWidgets('Second cookie clear does not have cookies',
(WidgetTester tester) async {
await tester.pumpWidget(
const WebView(
initialUrl: 'https://flutter.io',
),
);
final CookieManager cookieManager = CookieManager();
final bool hasCookies = await cookieManager.clearCookies();
expect(hasCookies, true);
final bool hasCookiesSecond = await cookieManager.clearCookies();
expect(hasCookiesSecond, false);
});
testWidgets('Initial JavaScript channels', (WidgetTester tester) async {
await tester.pumpWidget(
WebView(
initialUrl: 'https://youtube.com',
javascriptChannels: <JavascriptChannel>{
JavascriptChannel(
name: 'Tts', onMessageReceived: (JavascriptMessage msg) {}),
JavascriptChannel(
name: 'Alarm', onMessageReceived: (JavascriptMessage msg) {}),
},
),
);
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
expect(platformWebView.javascriptChannelNames,
unorderedEquals(<String>['Tts', 'Alarm']));
});
test('Only valid JavaScript channel names are allowed', () {
final JavascriptMessageHandler noOp = (JavascriptMessage msg) {};
JavascriptChannel(name: 'Tts1', onMessageReceived: noOp);
JavascriptChannel(name: '_Alarm', onMessageReceived: noOp);
JavascriptChannel(name: 'foo_bar_', onMessageReceived: noOp);
VoidCallback createChannel(String name) {
return () {
JavascriptChannel(name: name, onMessageReceived: noOp);
};
}
expect(createChannel('1Alarm'), throwsAssertionError);
expect(createChannel('foo.bar'), throwsAssertionError);
expect(createChannel(''), throwsAssertionError);
});
testWidgets('Unique JavaScript channel names are required',
(WidgetTester tester) async {
await tester.pumpWidget(
WebView(
initialUrl: 'https://youtube.com',
javascriptChannels: <JavascriptChannel>{
JavascriptChannel(
name: 'Alarm', onMessageReceived: (JavascriptMessage msg) {}),
JavascriptChannel(
name: 'Alarm', onMessageReceived: (JavascriptMessage msg) {}),
},
),
);
expect(tester.takeException(), isNot(null));
});
testWidgets('JavaScript channels update', (WidgetTester tester) async {
await tester.pumpWidget(
WebView(
initialUrl: 'https://youtube.com',
javascriptChannels: <JavascriptChannel>{
JavascriptChannel(
name: 'Tts', onMessageReceived: (JavascriptMessage msg) {}),
JavascriptChannel(
name: 'Alarm', onMessageReceived: (JavascriptMessage msg) {}),
},
),
);
await tester.pumpWidget(
WebView(
initialUrl: 'https://youtube.com',
javascriptChannels: <JavascriptChannel>{
JavascriptChannel(
name: 'Tts', onMessageReceived: (JavascriptMessage msg) {}),
JavascriptChannel(
name: 'Alarm2', onMessageReceived: (JavascriptMessage msg) {}),
JavascriptChannel(
name: 'Alarm3', onMessageReceived: (JavascriptMessage msg) {}),
},
),
);
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
expect(platformWebView.javascriptChannelNames,
unorderedEquals(<String>['Tts', 'Alarm2', 'Alarm3']));
});
testWidgets('Remove all JavaScript channels and then add',
(WidgetTester tester) async {
// This covers a specific bug we had where after updating javascriptChannels to null,
// updating it again with a subset of the previously registered channels fails as the
// widget's cache of current channel wasn't properly updated when updating javascriptChannels to
// null.
await tester.pumpWidget(
WebView(
initialUrl: 'https://youtube.com',
javascriptChannels: <JavascriptChannel>{
JavascriptChannel(
name: 'Tts', onMessageReceived: (JavascriptMessage msg) {}),
},
),
);
await tester.pumpWidget(
const WebView(
initialUrl: 'https://youtube.com',
),
);
await tester.pumpWidget(
WebView(
initialUrl: 'https://youtube.com',
javascriptChannels: <JavascriptChannel>{
JavascriptChannel(
name: 'Tts', onMessageReceived: (JavascriptMessage msg) {}),
},
),
);
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
expect(platformWebView.javascriptChannelNames,
unorderedEquals(<String>['Tts']));
});
testWidgets('JavaScript channel messages', (WidgetTester tester) async {
final List<String> ttsMessagesReceived = <String>[];
final List<String> alarmMessagesReceived = <String>[];
await tester.pumpWidget(
WebView(
initialUrl: 'https://youtube.com',
javascriptChannels: <JavascriptChannel>{
JavascriptChannel(
name: 'Tts',
onMessageReceived: (JavascriptMessage msg) {
ttsMessagesReceived.add(msg.message);
}),
JavascriptChannel(
name: 'Alarm',
onMessageReceived: (JavascriptMessage msg) {
alarmMessagesReceived.add(msg.message);
}),
},
),
);
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
expect(ttsMessagesReceived, isEmpty);
expect(alarmMessagesReceived, isEmpty);
platformWebView.fakeJavascriptPostMessage('Tts', 'Hello');
platformWebView.fakeJavascriptPostMessage('Tts', 'World');
expect(ttsMessagesReceived, <String>['Hello', 'World']);
});
group('$PageStartedCallback', () {
testWidgets('onPageStarted is not null', (WidgetTester tester) async {
String? returnedUrl;
await tester.pumpWidget(WebView(
initialUrl: 'https://youtube.com',
onPageStarted: (String url) {
returnedUrl = url;
},
));
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
platformWebView.fakeOnPageStartedCallback();
expect(platformWebView.currentUrl, returnedUrl);
});
testWidgets('onPageStarted is null', (WidgetTester tester) async {
await tester.pumpWidget(const WebView(
initialUrl: 'https://youtube.com',
onPageStarted: null,
));
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
// The platform side will always invoke a call for onPageStarted. This is
// to test that it does not crash on a null callback.
platformWebView.fakeOnPageStartedCallback();
});
testWidgets('onPageStarted changed', (WidgetTester tester) async {
String? returnedUrl;
await tester.pumpWidget(WebView(
initialUrl: 'https://youtube.com',
onPageStarted: (String url) {},
));
await tester.pumpWidget(WebView(
initialUrl: 'https://youtube.com',
onPageStarted: (String url) {
returnedUrl = url;
},
));
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
platformWebView.fakeOnPageStartedCallback();
expect(platformWebView.currentUrl, returnedUrl);
});
});
group('$PageFinishedCallback', () {
testWidgets('onPageFinished is not null', (WidgetTester tester) async {
String? returnedUrl;
await tester.pumpWidget(WebView(
initialUrl: 'https://youtube.com',
onPageFinished: (String url) {
returnedUrl = url;
},
));
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
platformWebView.fakeOnPageFinishedCallback();
expect(platformWebView.currentUrl, returnedUrl);
});
testWidgets('onPageFinished is null', (WidgetTester tester) async {
await tester.pumpWidget(const WebView(
initialUrl: 'https://youtube.com',
onPageFinished: null,
));
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
// The platform side will always invoke a call for onPageFinished. This is
// to test that it does not crash on a null callback.
platformWebView.fakeOnPageFinishedCallback();
});
testWidgets('onPageFinished changed', (WidgetTester tester) async {
String? returnedUrl;
await tester.pumpWidget(WebView(
initialUrl: 'https://youtube.com',
onPageFinished: (String url) {},
));
await tester.pumpWidget(WebView(
initialUrl: 'https://youtube.com',
onPageFinished: (String url) {
returnedUrl = url;
},
));
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
platformWebView.fakeOnPageFinishedCallback();
expect(platformWebView.currentUrl, returnedUrl);
});
});
group('navigationDelegate', () {
testWidgets('hasNavigationDelegate', (WidgetTester tester) async {
await tester.pumpWidget(const WebView(
initialUrl: 'https://youtube.com',
));
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
expect(platformWebView.hasNavigationDelegate, false);
await tester.pumpWidget(WebView(
initialUrl: 'https://youtube.com',
navigationDelegate: (NavigationRequest r) =>
NavigationDecision.navigate,
));
expect(platformWebView.hasNavigationDelegate, true);
});
testWidgets('Block navigation', (WidgetTester tester) async {
final List<NavigationRequest> navigationRequests = <NavigationRequest>[];
await tester.pumpWidget(WebView(
initialUrl: 'https://youtube.com',
navigationDelegate: (NavigationRequest request) {
navigationRequests.add(request);
// Only allow navigating to https://flutter.dev
return request.url == 'https://flutter.dev'
? NavigationDecision.navigate
: NavigationDecision.prevent;
}));
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
expect(platformWebView.hasNavigationDelegate, true);
platformWebView.fakeNavigate('https://www.google.com');
// The navigation delegate only allows navigation to https://flutter.dev
// so we should still be in https://youtube.com.
expect(platformWebView.currentUrl, 'https://youtube.com');
expect(navigationRequests.length, 1);
expect(navigationRequests[0].url, 'https://www.google.com');
expect(navigationRequests[0].isForMainFrame, true);
platformWebView.fakeNavigate('https://flutter.dev');
await tester.pump();
expect(platformWebView.currentUrl, 'https://flutter.dev');
});
});
group('debuggingEnabled', () {
testWidgets('enable debugging', (WidgetTester tester) async {
await tester.pumpWidget(const WebView(
debuggingEnabled: true,
));
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
expect(platformWebView.debuggingEnabled, true);
});
testWidgets('defaults to false', (WidgetTester tester) async {
await tester.pumpWidget(const WebView());
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
expect(platformWebView.debuggingEnabled, false);
});
testWidgets('can be changed', (WidgetTester tester) async {
final GlobalKey key = GlobalKey();
await tester.pumpWidget(WebView(key: key));
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
await tester.pumpWidget(WebView(
key: key,
debuggingEnabled: true,
));
expect(platformWebView.debuggingEnabled, true);
await tester.pumpWidget(WebView(
key: key,
debuggingEnabled: false,
));
expect(platformWebView.debuggingEnabled, false);
});
});
group('Custom platform implementation', () {
setUpAll(() {
WebView.platform = MyWebViewPlatform();
});
tearDownAll(() {
WebView.platform = null;
});
testWidgets('creation', (WidgetTester tester) async {
await tester.pumpWidget(
const WebView(
initialUrl: 'https://youtube.com',
gestureNavigationEnabled: true,
),
);
final MyWebViewPlatform builder = WebView.platform as MyWebViewPlatform;
final MyWebViewPlatformController platform = builder.lastPlatformBuilt!;
expect(
platform.creationParams,
MatchesCreationParams(CreationParams(
initialUrl: 'https://youtube.com',
webSettings: WebSettings(
javascriptMode: JavascriptMode.disabled,
hasNavigationDelegate: false,
debuggingEnabled: false,
userAgent: WebSetting<String?>.of(null),
gestureNavigationEnabled: true,
),
)));
});
testWidgets('loadUrl', (WidgetTester tester) async {
late WebViewController controller;
await tester.pumpWidget(
WebView(
initialUrl: 'https://youtube.com',
onWebViewCreated: (WebViewController webViewController) {
controller = webViewController;
},
),
);
final MyWebViewPlatform builder = WebView.platform as MyWebViewPlatform;
final MyWebViewPlatformController platform = builder.lastPlatformBuilt!;
final Map<String, String> headers = <String, String>{
'header': 'value',
};
await controller.loadUrl('https://google.com', headers: headers);
expect(platform.lastUrlLoaded, 'https://google.com');
expect(platform.lastRequestHeaders, headers);
});
});
testWidgets('Set UserAgent', (WidgetTester tester) async {
await tester.pumpWidget(const WebView(
initialUrl: 'https://youtube.com',
javascriptMode: JavascriptMode.unrestricted,
));
final FakePlatformWebView platformWebView =
fakePlatformViewsController.lastCreatedView!;
expect(platformWebView.userAgent, isNull);
await tester.pumpWidget(const WebView(
initialUrl: 'https://youtube.com',
javascriptMode: JavascriptMode.unrestricted,
userAgent: 'UA',
));
expect(platformWebView.userAgent, 'UA');
});
}
class FakePlatformWebView {
FakePlatformWebView(int? id, Map<dynamic, dynamic> params) {
if (params.containsKey('initialUrl')) {
final String? initialUrl = params['initialUrl'];
if (initialUrl != null) {
history.add(initialUrl);
currentPosition++;
}
}
if (params.containsKey('javascriptChannelNames')) {
javascriptChannelNames =
List<String>.from(params['javascriptChannelNames']);
}
javascriptMode = JavascriptMode.values[params['settings']['jsMode']];
hasNavigationDelegate =
params['settings']['hasNavigationDelegate'] ?? false;
debuggingEnabled = params['settings']['debuggingEnabled'];
userAgent = params['settings']['userAgent'];
channel = MethodChannel(
'plugins.flutter.io/webview_$id', const StandardMethodCodec());
channel.setMockMethodCallHandler(onMethodCall);
}
late MethodChannel channel;
List<String?> history = <String?>[];
int currentPosition = -1;
int amountOfReloadsOnCurrentUrl = 0;
bool hasCache = true;
String? get currentUrl => history.isEmpty ? null : history[currentPosition];
JavascriptMode? javascriptMode;
List<String>? javascriptChannelNames;
bool? hasNavigationDelegate;
bool? debuggingEnabled;
String? userAgent;
Future<dynamic> onMethodCall(MethodCall call) {
switch (call.method) {
case 'loadUrl':
final Map<dynamic, dynamic> request = call.arguments;
_loadUrl(request['url']);
return Future<void>.sync(() {});
case 'updateSettings':
if (call.arguments['jsMode'] != null) {
javascriptMode = JavascriptMode.values[call.arguments['jsMode']];
}
if (call.arguments['hasNavigationDelegate'] != null) {
hasNavigationDelegate = call.arguments['hasNavigationDelegate'];
}
if (call.arguments['debuggingEnabled'] != null) {
debuggingEnabled = call.arguments['debuggingEnabled'];
}
userAgent = call.arguments['userAgent'];
break;
case 'canGoBack':
return Future<bool>.sync(() => currentPosition > 0);
case 'canGoForward':
return Future<bool>.sync(() => currentPosition < history.length - 1);
case 'goBack':
currentPosition = max(-1, currentPosition - 1);
return Future<void>.sync(() {});
case 'goForward':
currentPosition = min(history.length - 1, currentPosition + 1);
return Future<void>.sync(() {});
case 'reload':
amountOfReloadsOnCurrentUrl++;
return Future<void>.sync(() {});
case 'currentUrl':
return Future<String?>.value(currentUrl);
case 'evaluateJavascript':
return Future<dynamic>.value(call.arguments);
case 'addJavascriptChannels':
final List<String> channelNames = List<String>.from(call.arguments);
javascriptChannelNames!.addAll(channelNames);
break;
case 'removeJavascriptChannels':
final List<String> channelNames = List<String>.from(call.arguments);
javascriptChannelNames!
.removeWhere((String channel) => channelNames.contains(channel));
break;
case 'clearCache':
hasCache = false;
return Future<void>.sync(() {});
}
return Future<void>.sync(() {});
}
void fakeJavascriptPostMessage(String jsChannel, String message) {
final StandardMethodCodec codec = const StandardMethodCodec();
final Map<String, dynamic> arguments = <String, dynamic>{
'channel': jsChannel,
'message': message
};
final ByteData data = codec
.encodeMethodCall(MethodCall('javascriptChannelMessage', arguments));
ServicesBinding.instance!.defaultBinaryMessenger
.handlePlatformMessage(channel.name, data, (ByteData? data) {});
}
// Fakes a main frame navigation that was initiated by the webview, e.g when
// the user clicks a link in the currently loaded page.
void fakeNavigate(String url) {
if (!hasNavigationDelegate!) {
print('no navigation delegate');
_loadUrl(url);
return;
}
final StandardMethodCodec codec = const StandardMethodCodec();
final Map<String, dynamic> arguments = <String, dynamic>{
'url': url,
'isForMainFrame': true
};
final ByteData data =
codec.encodeMethodCall(MethodCall('navigationRequest', arguments));
ServicesBinding.instance!.defaultBinaryMessenger
.handlePlatformMessage(channel.name, data, (ByteData? data) {
final bool allow = codec.decodeEnvelope(data!);
if (allow) {
_loadUrl(url);
}
});
}
void fakeOnPageStartedCallback() {
final StandardMethodCodec codec = const StandardMethodCodec();
final ByteData data = codec.encodeMethodCall(MethodCall(
'onPageStarted',
<dynamic, dynamic>{'url': currentUrl},
));