[webview] Add macOS support in implementation package

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FLTWebViewFlutterPlugin.h → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FLTWebViewFlutterPlugin.h

@@ -2,9 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import <Flutter/Flutter.h>
 #import <WebKit/WebKit.h>
 
+#if TARGET_OS_OSX
+#import <FlutterMacOS/FlutterMacOS.h>
+#else
+#import <Flutter/Flutter.h>
+#endif
+
 NS_ASSUME_NONNULL_BEGIN
 
 @interface FLTWebViewFlutterPlugin : NSObject <FlutterPlugin>

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FLTWebViewFlutterPlugin.m → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FLTWebViewFlutterPlugin.m

@@ -36,10 +36,16 @@ - (instancetype)initWithManager:(FWFInstanceManager *)manager {
   return self;
 }
 
+#pragma mark FlutterPlatformViewFactory
+
 - (NSObject<FlutterMessageCodec> *)createArgsCodec {
   return [FlutterStandardMessageCodec sharedInstance];
 }
 
+// The FlutterPlatformViewFactory protocol is slightly different on iOS and
+// macOS.
+#if TARGET_OS_IOS
+
 - (NSObject<FlutterPlatformView> *)createWithFrame:(CGRect)frame
                                     viewIdentifier:(int64_t)viewId
                                          arguments:(id _Nullable)args {
@@ -50,6 +56,17 @@ - (instancetype)initWithManager:(FWFInstanceManager *)manager {
   return webView;
 }
 
+#else
+
+- (nonnull NSView *)createWithViewIdentifier:(int64_t)viewId arguments:(nullable id)args {
+  NSNumber *identifier = (NSNumber *)args;
+  FWFWebView *webView =
+      (FWFWebView *)[self.instanceManager instanceForIdentifier:identifier.longValue];
+  return webView;
+}
+
+#endif
+
 @end
 
 @implementation FLTWebViewFlutterPlugin
@@ -88,8 +105,10 @@ + (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar {
   SetUpFWFWKUIDelegateHostApi(registrar.messenger, [[FWFUIDelegateHostApiImpl alloc]
                                                        initWithBinaryMessenger:registrar.messenger
                                                                instanceManager:instanceManager]);
+#if TARGET_OS_IOS
   SetUpFWFUIViewHostApi(registrar.messenger,
                         [[FWFUIViewHostApiImpl alloc] initWithInstanceManager:instanceManager]);
+#endif
   SetUpFWFWKUserContentControllerHostApi(
       registrar.messenger,
       [[FWFUserContentControllerHostApiImpl alloc] initWithInstanceManager:instanceManager]);
@@ -106,10 +125,12 @@ + (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar {
   SetUpFWFNSUrlHostApi(registrar.messenger,
                        [[FWFURLHostApiImpl alloc] initWithBinaryMessenger:registrar.messenger
                                                           instanceManager:instanceManager]);
+#if TARGET_OS_IOS
   SetUpFWFUIScrollViewDelegateHostApi(
       registrar.messenger,
       [[FWFScrollViewDelegateHostApiImpl alloc] initWithBinaryMessenger:registrar.messenger
                                                         instanceManager:instanceManager]);
+#endif
   SetUpFWFNSUrlCredentialHostApi(
       registrar.messenger,
       [[FWFURLCredentialHostApiImpl alloc] initWithBinaryMessenger:registrar.messenger

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFDataConverters.h → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFDataConverters.h

@@ -178,7 +178,7 @@ extern FWFWKSecurityOriginData *FWFWKSecurityOriginDataFromNativeWKSecurityOrigi
  *
  * @return A WKPermissionDecision or -1 if data could not be converted.
  */
-API_AVAILABLE(ios(15.0))
+API_AVAILABLE(ios(15.0), macos(12))
 extern WKPermissionDecision FWFNativeWKPermissionDecisionFromData(
     FWFWKPermissionDecisionData *data);
 
@@ -189,7 +189,7 @@ extern WKPermissionDecision FWFNativeWKPermissionDecisionFromData(
  *
  * @return A FWFWKMediaCaptureTypeData or nil if data could not be converted.
  */
-API_AVAILABLE(ios(15.0))
+API_AVAILABLE(ios(15.0), macos(12))
 extern FWFWKMediaCaptureTypeData *FWFWKMediaCaptureTypeDataFromNativeWKMediaCaptureType(
     WKMediaCaptureType type);
 

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFDataConverters.m → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFDataConverters.m

@@ -4,7 +4,11 @@
 
 #import "FWFDataConverters.h"
 
+#if TARGET_OS_OSX
+#import <FlutterMacOS/FlutterMacOS.h>
+#else
 #import <Flutter/Flutter.h>
+#endif
 
 NSURLRequest *_Nullable FWFNativeNSURLRequestFromRequestData(FWFNSUrlRequestData *data) {
   NSURL *url = [NSURL URLWithString:data.url];
@@ -83,7 +87,7 @@ NSHTTPCookiePropertyKey _Nullable FWFNativeNSHTTPCookiePropertyKeyFromEnumData(
     case FWFNSHttpCookiePropertyKeyEnumPort:
       return NSHTTPCookiePort;
     case FWFNSHttpCookiePropertyKeyEnumSameSitePolicy:
-      if (@available(iOS 13.0, *)) {
+      if (@available(iOS 13.0, macOS 10.15, *)) {
         return NSHTTPCookieSameSitePolicy;
       } else {
         return nil;

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFHTTPCookieStoreHostApi.h → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFHTTPCookieStoreHostApi.h

@@ -2,9 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import <Flutter/Flutter.h>
 #import <WebKit/WebKit.h>
 
+#if TARGET_OS_OSX
+#import <FlutterMacOS/FlutterMacOS.h>
+#else
+#import <Flutter/Flutter.h>
+#endif
+
 #import "FWFGeneratedWebKitApis.h"
 #import "FWFInstanceManager.h"
 

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFNavigationDelegateHostApi.h → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFNavigationDelegateHostApi.h

@@ -2,10 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import <Flutter/Flutter.h>
 #import <Foundation/Foundation.h>
 #import <WebKit/WebKit.h>
 
+#if TARGET_OS_OSX
+#import <FlutterMacOS/FlutterMacOS.h>
+#else
+#import <Flutter/Flutter.h>
+#endif
+
 #import "FWFGeneratedWebKitApis.h"
 #import "FWFInstanceManager.h"
 #import "FWFObjectHostApi.h"

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFObjectHostApi.h → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFObjectHostApi.h

@@ -2,7 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#if TARGET_OS_OSX
+#import <FlutterMacOS/FlutterMacOS.h>
+#else
 #import <Flutter/Flutter.h>
+#endif
 
 #import "FWFGeneratedWebKitApis.h"
 #import "FWFInstanceManager.h"

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFPreferencesHostApi.h → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFPreferencesHostApi.h

@@ -2,7 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#if TARGET_OS_OSX
+#import <FlutterMacOS/FlutterMacOS.h>
+#else
 #import <Flutter/Flutter.h>
+#endif
 #import <WebKit/WebKit.h>
 
 #import "FWFGeneratedWebKitApis.h"

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScriptMessageHandlerHostApi.h → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFScriptMessageHandlerHostApi.h

@@ -2,9 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import <Flutter/Flutter.h>
 #import <WebKit/WebKit.h>
 
+#if TARGET_OS_OSX
+#import <FlutterMacOS/FlutterMacOS.h>
+#else
+#import <Flutter/Flutter.h>
+#endif
+
 #import "FWFGeneratedWebKitApis.h"
 #import "FWFInstanceManager.h"
 #import "FWFObjectHostApi.h"

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScrollViewDelegateHostApi.h → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFScrollViewDelegateHostApi.h

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Using directory structure to remove platform-specific files doesn't work
+// well with umbrella headers and module maps, so just no-op the file for
+// other platforms instead.
+#if TARGET_OS_IOS
+
 #import <Flutter/Flutter.h>
 #import <WebKit/WebKit.h>
 #import "FWFObjectHostApi.h"
@@ -44,3 +49,5 @@ NS_ASSUME_NONNULL_BEGIN
 @end
 
 NS_ASSUME_NONNULL_END
+
+#endif

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScrollViewDelegateHostApi.m → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFScrollViewDelegateHostApi.m

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Using directory structure to remove platform-specific files doesn't work
+// well with umbrella headers and module maps, so just no-op the file for
+// other platforms instead.
+#if TARGET_OS_IOS
+
 #import "FWFScrollViewDelegateHostApi.h"
 #import "FWFWebViewHostApi.h"
 
@@ -88,3 +93,5 @@ - (void)createWithIdentifier:(NSInteger)identifier error:(FlutterError *_Nullabl
   [self.instanceManager addDartCreatedInstance:uiScrollViewDelegate withIdentifier:identifier];
 }
 @end
+
+#endif

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScrollViewHostApi.h → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFScrollViewHostApi.h

@@ -2,9 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import <Flutter/Flutter.h>
 #import <WebKit/WebKit.h>
 
+#if TARGET_OS_OSX
+#import <FlutterMacOS/FlutterMacOS.h>
+#else
+#import <Flutter/Flutter.h>
+#endif
+
 #import "FWFGeneratedWebKitApis.h"
 #import "FWFInstanceManager.h"
 

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScrollViewHostApi.m → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFScrollViewHostApi.m

@@ -24,47 +24,65 @@ - (instancetype)initWithInstanceManager:(FWFInstanceManager *)instanceManager {
   return self;
 }
 
+#if TARGET_OS_IOS
 - (UIScrollView *)scrollViewForIdentifier:(NSInteger)identifier {
   return (UIScrollView *)[self.instanceManager instanceForIdentifier:identifier];
 }
+#endif
 
 - (void)createFromWebViewWithIdentifier:(NSInteger)identifier
                       webViewIdentifier:(NSInteger)webViewIdentifier
                                   error:(FlutterError *_Nullable __autoreleasing *_Nonnull)error {
+#if TARGET_OS_IOS
   WKWebView *webView = (WKWebView *)[self.instanceManager instanceForIdentifier:webViewIdentifier];
   [self.instanceManager addDartCreatedInstance:webView.scrollView withIdentifier:identifier];
+#else
+  *error = [FlutterError errorWithCode:@"UnavailableApi"
+                               message:@"scrollView is unavailable on macOS"
+                               details:nil];
+#endif
 }
 
 - (NSArray<NSNumber *> *)
     contentOffsetForScrollViewWithIdentifier:(NSInteger)identifier
                                        error:(FlutterError *_Nullable *_Nonnull)error {
+#if TARGET_OS_IOS
   CGPoint point = [[self scrollViewForIdentifier:identifier] contentOffset];
   return @[ @(point.x), @(point.y) ];
+#else
+  return @[ @(0), @(0) ];
+#endif
 }
 
 - (void)scrollByForScrollViewWithIdentifier:(NSInteger)identifier
                                           x:(double)x
                                           y:(double)y
                                       error:(FlutterError *_Nullable *_Nonnull)error {
+#if TARGET_OS_IOS
   UIScrollView *scrollView = [self scrollViewForIdentifier:identifier];
   CGPoint contentOffset = scrollView.contentOffset;
   [scrollView setContentOffset:CGPointMake(contentOffset.x + x, contentOffset.y + y)];
+#endif
 }
 
 - (void)setContentOffsetForScrollViewWithIdentifier:(NSInteger)identifier
                                                 toX:(double)x
                                                   y:(double)y
                                               error:(FlutterError *_Nullable *_Nonnull)error {
+#if TARGET_OS_IOS
   [[self scrollViewForIdentifier:identifier] setContentOffset:CGPointMake(x, y)];
+#endif
 }
 
 - (void)setDelegateForScrollViewWithIdentifier:(NSInteger)identifier
                 uiScrollViewDelegateIdentifier:(nullable NSNumber *)uiScrollViewDelegateIdentifier
                                          error:(FlutterError *_Nullable *_Nonnull)error {
+#if TARGET_OS_IOS
   [[self scrollViewForIdentifier:identifier]
       setDelegate:uiScrollViewDelegateIdentifier
                       ? (FWFScrollViewDelegate *)[self.instanceManager
                             instanceForIdentifier:uiScrollViewDelegateIdentifier.longValue]
                       : nil];
+#endif
 }
 @end

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIDelegateHostApi.h → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFUIDelegateHostApi.h

@@ -2,9 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import <Flutter/Flutter.h>
 #import <WebKit/WebKit.h>
 
+#if TARGET_OS_OSX
+#import <FlutterMacOS/FlutterMacOS.h>
+#else
+#import <Flutter/Flutter.h>
+#endif
+
 #import "FWFGeneratedWebKitApis.h"
 #import "FWFInstanceManager.h"
 #import "FWFObjectHostApi.h"

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIDelegateHostApi.m → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFUIDelegateHostApi.m

@@ -64,7 +64,7 @@ - (void)requestMediaCapturePermissionForDelegateWithIdentifier:(FWFUIDelegate *)
                                                           type:(WKMediaCaptureType)type
                                                     completion:
                                                         (void (^)(WKPermissionDecision))completion
-    API_AVAILABLE(ios(15.0)) {
+    API_AVAILABLE(ios(15.0), macos(12)) {
   [self
       requestMediaCapturePermissionForDelegateWithIdentifier:[self identifierForDelegate:instance]
                                            webViewIdentifier:
@@ -177,7 +177,7 @@ - (void)webView:(WKWebView *)webView
                           initiatedByFrame:(WKFrameInfo *)frame
                                       type:(WKMediaCaptureType)type
                            decisionHandler:(void (^)(WKPermissionDecision))decisionHandler
-    API_AVAILABLE(ios(15.0)) {
+    API_AVAILABLE(ios(15.0), macos(12)) {
   [self.UIDelegateAPI
       requestMediaCapturePermissionForDelegateWithIdentifier:self
                                                      webView:webView

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIViewHostApi.h → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFUIViewHostApi.h

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Using directory structure to remove platform-specific files doesn't work
+// well with umbrella headers and module maps, so just no-op the file for
+// other platforms instead.
+#if TARGET_OS_IOS
+
 #import <Flutter/Flutter.h>
 
 #import "FWFGeneratedWebKitApis.h"
@@ -19,3 +24,5 @@ NS_ASSUME_NONNULL_BEGIN
 @end
 
 NS_ASSUME_NONNULL_END
+
+#endif

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIViewHostApi.m → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFUIViewHostApi.m

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Using directory structure to remove platform-specific files doesn't work
+// well with umbrella headers and module maps, so just no-op the file for
+// other platforms instead.
+#if TARGET_OS_IOS
+
 #import "FWFUIViewHostApi.h"
 
 @interface FWFUIViewHostApiImpl ()
@@ -42,3 +47,5 @@ - (void)setOpaqueForViewWithIdentifier:(NSInteger)identifier
   [[self viewForIdentifier:identifier] setOpaque:opaque];
 }
 @end
+
+#endif

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFURLAuthenticationChallengeHostApi.h → packages/webview_flutter/webview_flutter_wkwebview/darwin/Classes/FWFURLAuthenticationChallengeHostApi.h

@@ -2,11 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import <Flutter/Flutter.h>
 #import <Foundation/Foundation.h>
 #import "FWFGeneratedWebKitApis.h"
 #import "FWFInstanceManager.h"
 
+#if TARGET_OS_OSX
+#import <FlutterMacOS/FlutterMacOS.h>
+#else
+#import <Flutter/Flutter.h>
+#endif
+
 NS_ASSUME_NONNULL_BEGIN
 
 /**