| // Copyright 2013 The Flutter 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 "FWFWebViewHostApi.h" |
| #import "FWFDataConverters.h" |
| |
| @implementation FWFAssetManager |
| - (NSString *)lookupKeyForAsset:(NSString *)asset { |
| return [FlutterDartProject lookupKeyForAsset:asset]; |
| } |
| @end |
| |
| @implementation FWFWebView |
| - (instancetype)initWithFrame:(CGRect)frame |
| configuration:(nonnull WKWebViewConfiguration *)configuration |
| binaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger |
| instanceManager:(FWFInstanceManager *)instanceManager { |
| self = [self initWithFrame:frame configuration:configuration]; |
| if (self) { |
| _objectApi = [[FWFObjectFlutterApiImpl alloc] initWithBinaryMessenger:binaryMessenger |
| instanceManager:instanceManager]; |
| |
| self.scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever; |
| if (@available(iOS 13.0, *)) { |
| self.scrollView.automaticallyAdjustsScrollIndicatorInsets = NO; |
| } |
| } |
| return self; |
| } |
| |
| - (void)setFrame:(CGRect)frame { |
| [super setFrame:frame]; |
| // Prevents the contentInsets from being adjusted by iOS and gives control to Flutter. |
| self.scrollView.contentInset = UIEdgeInsetsZero; |
| |
| // Adjust contentInset to compensate the adjustedContentInset so the sum will |
| // always be 0. |
| if (UIEdgeInsetsEqualToEdgeInsets(self.scrollView.adjustedContentInset, UIEdgeInsetsZero)) { |
| return; |
| } |
| UIEdgeInsets insetToAdjust = self.scrollView.adjustedContentInset; |
| self.scrollView.contentInset = UIEdgeInsetsMake(-insetToAdjust.top, -insetToAdjust.left, |
| -insetToAdjust.bottom, -insetToAdjust.right); |
| } |
| |
| - (void)observeValueForKeyPath:(NSString *)keyPath |
| ofObject:(id)object |
| change:(NSDictionary<NSKeyValueChangeKey, id> *)change |
| context:(void *)context { |
| [self.objectApi observeValueForObject:self |
| keyPath:keyPath |
| object:object |
| change:change |
| completion:^(FlutterError *error) { |
| NSAssert(!error, @"%@", error); |
| }]; |
| } |
| |
| - (nonnull UIView *)view { |
| return self; |
| } |
| @end |
| |
| @interface FWFWebViewHostApiImpl () |
| // BinaryMessenger must be weak to prevent a circular reference with the host API it |
| // references. |
| @property(nonatomic, weak) id<FlutterBinaryMessenger> binaryMessenger; |
| // InstanceManager must be weak to prevent a circular reference with the object it stores. |
| @property(nonatomic, weak) FWFInstanceManager *instanceManager; |
| @property NSBundle *bundle; |
| @property FWFAssetManager *assetManager; |
| @end |
| |
| @implementation FWFWebViewHostApiImpl |
| - (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger |
| instanceManager:(FWFInstanceManager *)instanceManager { |
| return [self initWithBinaryMessenger:binaryMessenger |
| instanceManager:instanceManager |
| bundle:[NSBundle mainBundle] |
| assetManager:[[FWFAssetManager alloc] init]]; |
| } |
| |
| - (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger |
| instanceManager:(FWFInstanceManager *)instanceManager |
| bundle:(NSBundle *)bundle |
| assetManager:(FWFAssetManager *)assetManager { |
| self = [self init]; |
| if (self) { |
| _binaryMessenger = binaryMessenger; |
| _instanceManager = instanceManager; |
| _bundle = bundle; |
| _assetManager = assetManager; |
| } |
| return self; |
| } |
| |
| - (FWFWebView *)webViewForIdentifier:(NSInteger)identifier { |
| return (FWFWebView *)[self.instanceManager instanceForIdentifier:identifier]; |
| } |
| |
| + (nonnull FlutterError *)errorForURLString:(nonnull NSString *)string { |
| NSString *errorDetails = [NSString stringWithFormat:@"Initializing NSURL with the supplied " |
| @"'%@' path resulted in a nil value.", |
| string]; |
| return [FlutterError errorWithCode:@"FWFURLParsingError" |
| message:@"Failed parsing file path." |
| details:errorDetails]; |
| } |
| |
| - (void)createWithIdentifier:(NSInteger)identifier |
| configurationIdentifier:(NSInteger)configurationIdentifier |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| WKWebViewConfiguration *configuration = (WKWebViewConfiguration *)[self.instanceManager |
| instanceForIdentifier:configurationIdentifier]; |
| FWFWebView *webView = [[FWFWebView alloc] initWithFrame:CGRectMake(0, 0, 0, 0) |
| configuration:configuration |
| binaryMessenger:self.binaryMessenger |
| instanceManager:self.instanceManager]; |
| [self.instanceManager addDartCreatedInstance:webView withIdentifier:identifier]; |
| } |
| |
| - (void)loadRequestForWebViewWithIdentifier:(NSInteger)identifier |
| request:(nonnull FWFNSUrlRequestData *)request |
| error: |
| (FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| NSURLRequest *urlRequest = FWFNativeNSURLRequestFromRequestData(request); |
| if (!urlRequest) { |
| *error = [FlutterError errorWithCode:@"FWFURLRequestParsingError" |
| message:@"Failed instantiating an NSURLRequest." |
| details:[NSString stringWithFormat:@"URL was: '%@'", request.url]]; |
| return; |
| } |
| [[self webViewForIdentifier:identifier] loadRequest:urlRequest]; |
| } |
| |
| - (void)setCustomUserAgentForWebViewWithIdentifier:(NSInteger)identifier |
| userAgent:(nullable NSString *)userAgent |
| error: |
| (FlutterError *_Nullable __autoreleasing *_Nonnull) |
| error { |
| [[self webViewForIdentifier:identifier] setCustomUserAgent:userAgent]; |
| } |
| |
| - (nullable NSNumber *) |
| canGoBackForWebViewWithIdentifier:(NSInteger)identifier |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| return @([self webViewForIdentifier:identifier].canGoBack); |
| } |
| |
| - (nullable NSString *) |
| URLForWebViewWithIdentifier:(NSInteger)identifier |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| return [self webViewForIdentifier:identifier].URL.absoluteString; |
| } |
| |
| - (nullable NSNumber *) |
| canGoForwardForWebViewWithIdentifier:(NSInteger)identifier |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| return @([[self webViewForIdentifier:identifier] canGoForward]); |
| } |
| |
| - (nullable NSNumber *) |
| estimatedProgressForWebViewWithIdentifier:(NSInteger)identifier |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull) |
| error { |
| return @([[self webViewForIdentifier:identifier] estimatedProgress]); |
| } |
| |
| - (void)evaluateJavaScriptForWebViewWithIdentifier:(NSInteger)identifier |
| javaScriptString:(nonnull NSString *)javaScriptString |
| completion: |
| (nonnull void (^)(id _Nullable, |
| FlutterError *_Nullable))completion { |
| [[self webViewForIdentifier:identifier] |
| evaluateJavaScript:javaScriptString |
| completionHandler:^(id _Nullable result, NSError *_Nullable error) { |
| id returnValue = nil; |
| FlutterError *flutterError = nil; |
| if (!error) { |
| if (!result || [result isKindOfClass:[NSString class]] || |
| [result isKindOfClass:[NSNumber class]]) { |
| returnValue = result; |
| } else if (![result isKindOfClass:[NSNull class]]) { |
| NSString *className = NSStringFromClass([result class]); |
| NSLog(@"Return type of evaluateJavaScript is not directly supported: %@. Returned " |
| @"description of value.", |
| className); |
| returnValue = [result description]; |
| } |
| } else { |
| flutterError = [FlutterError errorWithCode:@"FWFEvaluateJavaScriptError" |
| message:@"Failed evaluating JavaScript." |
| details:FWFNSErrorDataFromNativeNSError(error)]; |
| } |
| |
| completion(returnValue, flutterError); |
| }]; |
| } |
| |
| - (void)setInspectableForWebViewWithIdentifier:(NSInteger)identifier |
| inspectable:(BOOL)inspectable |
| error:(FlutterError *_Nullable *_Nonnull)error { |
| if (@available(macOS 13.3, iOS 16.4, tvOS 16.4, *)) { |
| #if __MAC_OS_X_VERSION_MAX_ALLOWED >= 130300 || __IPHONE_OS_VERSION_MAX_ALLOWED >= 160400 |
| [[self webViewForIdentifier:identifier] setInspectable:inspectable]; |
| #endif |
| } else { |
| *error = [FlutterError errorWithCode:@"FWFUnsupportedVersionError" |
| message:@"setInspectable is only supported on versions 16.4+." |
| details:nil]; |
| } |
| } |
| |
| - (void)goBackForWebViewWithIdentifier:(NSInteger)identifier |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| [[self webViewForIdentifier:identifier] goBack]; |
| } |
| |
| - (void)goForwardForWebViewWithIdentifier:(NSInteger)identifier |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| [[self webViewForIdentifier:identifier] goForward]; |
| } |
| |
| - (void)loadAssetForWebViewWithIdentifier:(NSInteger)identifier |
| assetKey:(nonnull NSString *)key |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| NSString *assetFilePath = [self.assetManager lookupKeyForAsset:key]; |
| |
| NSURL *url = [self.bundle URLForResource:[assetFilePath stringByDeletingPathExtension] |
| withExtension:assetFilePath.pathExtension]; |
| if (!url) { |
| *error = [FWFWebViewHostApiImpl errorForURLString:assetFilePath]; |
| } else { |
| [[self webViewForIdentifier:identifier] loadFileURL:url |
| allowingReadAccessToURL:[url URLByDeletingLastPathComponent]]; |
| } |
| } |
| |
| - (void)loadFileForWebViewWithIdentifier:(NSInteger)identifier |
| fileURL:(nonnull NSString *)url |
| readAccessURL:(nonnull NSString *)readAccessUrl |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| NSURL *fileURL = [NSURL fileURLWithPath:url isDirectory:NO]; |
| NSURL *readAccessNSURL = [NSURL fileURLWithPath:readAccessUrl isDirectory:YES]; |
| |
| if (!fileURL) { |
| *error = [FWFWebViewHostApiImpl errorForURLString:url]; |
| } else if (!readAccessNSURL) { |
| *error = [FWFWebViewHostApiImpl errorForURLString:readAccessUrl]; |
| } else { |
| [[self webViewForIdentifier:identifier] loadFileURL:fileURL |
| allowingReadAccessToURL:readAccessNSURL]; |
| } |
| } |
| |
| - (void)loadHTMLForWebViewWithIdentifier:(NSInteger)identifier |
| HTMLString:(nonnull NSString *)string |
| baseURL:(nullable NSString *)baseUrl |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| [[self webViewForIdentifier:identifier] loadHTMLString:string |
| baseURL:[NSURL URLWithString:baseUrl]]; |
| } |
| |
| - (void)reloadWebViewWithIdentifier:(NSInteger)identifier |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| [[self webViewForIdentifier:identifier] reload]; |
| } |
| |
| - (void) |
| setAllowsBackForwardForWebViewWithIdentifier:(NSInteger)identifier |
| isAllowed:(BOOL)allow |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull) |
| error { |
| [[self webViewForIdentifier:identifier] setAllowsBackForwardNavigationGestures:allow]; |
| } |
| |
| - (void) |
| setNavigationDelegateForWebViewWithIdentifier:(NSInteger)identifier |
| delegateIdentifier:(nullable NSNumber *)navigationDelegateIdentifier |
| error: |
| (FlutterError *_Nullable __autoreleasing *_Nonnull) |
| error { |
| id<WKNavigationDelegate> navigationDelegate = (id<WKNavigationDelegate>)[self.instanceManager |
| instanceForIdentifier:navigationDelegateIdentifier.longValue]; |
| [[self webViewForIdentifier:identifier] setNavigationDelegate:navigationDelegate]; |
| } |
| |
| - (void)setUIDelegateForWebViewWithIdentifier:(NSInteger)identifier |
| delegateIdentifier:(nullable NSNumber *)uiDelegateIdentifier |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull) |
| error { |
| id<WKUIDelegate> navigationDelegate = |
| (id<WKUIDelegate>)[self.instanceManager instanceForIdentifier:uiDelegateIdentifier.longValue]; |
| [[self webViewForIdentifier:identifier] setUIDelegate:navigationDelegate]; |
| } |
| |
| - (nullable NSString *) |
| titleForWebViewWithIdentifier:(NSInteger)identifier |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| return [[self webViewForIdentifier:identifier] title]; |
| } |
| |
| - (nullable NSString *) |
| customUserAgentForWebViewWithIdentifier:(NSInteger)identifier |
| error: |
| (FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| return [[self webViewForIdentifier:identifier] customUserAgent]; |
| } |
| @end |
