src/ios/CDVWKWebViewEngine.m - cordova-plugin-wkwebview-engine - Git at Google

 /*
  Licensed to the Apache Software Foundation (ASF) under one
  or more contributor license agreements.  See the NOTICE file
  distributed with this work for additional information
  regarding copyright ownership.  The ASF licenses this file
  to you under the Apache License, Version 2.0 (the
  "License"); you may not use this file except in compliance
  with the License.  You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an
  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  KIND, either express or implied.  See the License for the
  specific language governing permissions and limitations
  under the License.
  */

 #import "CDVWKWebViewEngine.h"
 #import "CDVWKWebViewUIDelegate.h"
 #import <Cordova/NSDictionary+CordovaPreferences.h>

 #import <objc/message.h>

 #define CDV_BRIDGE_NAME @"cordova"
 #define CDV_WKWEBVIEW_FILE_URL_LOAD_SELECTOR @"loadFileURL:allowingReadAccessToURL:"

 @interface CDVWKWebViewEngine ()

 @property (nonatomic, strong, readwrite) UIView* engineWebView;
 @property (nonatomic, strong, readwrite) id <WKUIDelegate> uiDelegate;

 @end

 // see forwardingTargetForSelector: selector comment for the reason for this pragma
 #pragma clang diagnostic ignored "-Wprotocol"

 @implementation CDVWKWebViewEngine

 @synthesize engineWebView = _engineWebView;

 - (instancetype)initWithFrame:(CGRect)frame
 {
     self = [super init];
     if (self) {
         if (NSClassFromString(@"WKWebView") == nil) {
             return nil;
         }
         self.uiDelegate = [[CDVWKWebViewUIDelegate alloc] initWithTitle:[[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleDisplayName"]];

         WKUserContentController* userContentController = [[WKUserContentController alloc] init];
         [userContentController addScriptMessageHandler:self name:CDV_BRIDGE_NAME];

         WKWebViewConfiguration* configuration = [[WKWebViewConfiguration alloc] init];
         configuration.userContentController = userContentController;

         WKWebView* wkWebView = [[WKWebView alloc] initWithFrame:frame configuration:configuration];

         wkWebView.UIDelegate = self.uiDelegate;

         self.engineWebView = wkWebView;

         NSLog(@"Using WKWebView");
     }

     return self;
 }

 - (void)pluginInitialize
 {
     // viewController would be available now. we attempt to set all possible delegates to it, by default

     WKWebView* wkWebView = (WKWebView*)_engineWebView;

     if ([self.viewController conformsToProtocol:@protocol(WKUIDelegate)]) {
         wkWebView.UIDelegate = (id <WKUIDelegate>)self.viewController;
     }

     if ([self.viewController conformsToProtocol:@protocol(WKNavigationDelegate)]) {
         wkWebView.navigationDelegate = (id <WKNavigationDelegate>)self.viewController;
     } else {
         wkWebView.navigationDelegate = (id <WKNavigationDelegate>)self;
     }

     if ([self.viewController conformsToProtocol:@protocol(WKScriptMessageHandler)]) {
         [wkWebView.configuration.userContentController addScriptMessageHandler:(id < WKScriptMessageHandler >)self.viewController name:@"cordova"];
     }

     [self updateSettings:self.commandDelegate.settings];

     // check if content thread has died on resume
     NSLog(@"%@", @"CDVWKWebViewEngine will reload WKWebView if required on resume");
     [[NSNotificationCenter defaultCenter]
         addObserver:self
            selector:@selector(onAppWillEnterForeground:)
                name:UIApplicationWillEnterForegroundNotification object:nil];
 }

 - (void) onAppWillEnterForeground:(NSNotification*)notification {
     [self reloadIfRequired];
 }

 - (BOOL)reloadIfRequired
 {
     WKWebView* wkWebView = (WKWebView*)_engineWebView;
     NSString* title = wkWebView.title;
     BOOL reload = ((title == nil) || [title isEqualToString:@""]);

 #ifdef DEBUG
     NSLog(@"%@", @"CDVWKWebViewEngine reloadIfRequired");
     NSLog(@"CDVWKWebViewEngine reloadIfRequired WKWebView.title: %@", title);
     NSLog(@"CDVWKWebViewEngine reloadIfRequired reload: %u", reload);
 #endif

     if (reload) {
         NSLog(@"%@", @"CDVWKWebViewEngine reloading!");
         [wkWebView reload];
     }
     return reload;
 }

 - (id)loadRequest:(NSURLRequest*)request
 {
     if ([self canLoadRequest:request]) { // can load, differentiate between file urls and other schemes
         if (request.URL.fileURL) {
             SEL wk_sel = NSSelectorFromString(CDV_WKWEBVIEW_FILE_URL_LOAD_SELECTOR);
             NSURL* readAccessUrl = [request.URL URLByDeletingLastPathComponent];
             return ((id (*)(id, SEL, id, id))objc_msgSend)(_engineWebView, wk_sel, request.URL, readAccessUrl);
         } else {
             return [(WKWebView*)_engineWebView loadRequest:request];
         }
     } else { // can't load, print out error
         NSString* errorHtml = [NSString stringWithFormat:
                                @"<!doctype html>"
                                @"<title>Error</title>"
                                @"<div style='font-size:2em'>"
                                @"   <p>The WebView engine '%@' is unable to load the request: %@</p>"
                                @"   <p>Most likely the cause of the error is that the loading of file urls is not supported in iOS %@.</p>"
                                @"</div>",
                                NSStringFromClass([self class]),
                                [request.URL description],
                                [[UIDevice currentDevice] systemVersion]
                                ];
         return [self loadHTMLString:errorHtml baseURL:nil];
     }
 }

 - (id)loadHTMLString:(NSString*)string baseURL:(NSURL*)baseURL
 {
     return [(WKWebView*)_engineWebView loadHTMLString:string baseURL:baseURL];
 }

 - (NSURL*) URL
 {
     return [(WKWebView*)_engineWebView URL];
 }

 - (BOOL) canLoadRequest:(NSURLRequest*)request
 {
     // See: https://issues.apache.org/jira/browse/CB-9636
     SEL wk_sel = NSSelectorFromString(CDV_WKWEBVIEW_FILE_URL_LOAD_SELECTOR);

     // if it's a file URL, check whether WKWebView has the selector (which is in iOS 9 and up only)
     if (request.URL.fileURL) {
         return [_engineWebView respondsToSelector:wk_sel];
     } else {
         return YES;
     }
 }

 - (void)updateSettings:(NSDictionary*)settings
 {
     WKWebView* wkWebView = (WKWebView*)_engineWebView;

     wkWebView.configuration.preferences.minimumFontSize = [settings cordovaFloatSettingForKey:@"MinimumFontSize" defaultValue:0.0];
     wkWebView.configuration.allowsInlineMediaPlayback = [settings cordovaBoolSettingForKey:@"AllowInlineMediaPlayback" defaultValue:NO];
     wkWebView.configuration.mediaPlaybackRequiresUserAction = [settings cordovaBoolSettingForKey:@"MediaPlaybackRequiresUserAction" defaultValue:YES];
     wkWebView.configuration.suppressesIncrementalRendering = [settings cordovaBoolSettingForKey:@"SuppressesIncrementalRendering" defaultValue:NO];
     wkWebView.configuration.mediaPlaybackAllowsAirPlay = [settings cordovaBoolSettingForKey:@"MediaPlaybackAllowsAirPlay" defaultValue:YES];

     /*
      wkWebView.configuration.preferences.javaScriptEnabled = [settings cordovaBoolSettingForKey:@"JavaScriptEnabled" default:YES];
      wkWebView.configuration.preferences.javaScriptCanOpenWindowsAutomatically = [settings cordovaBoolSettingForKey:@"JavaScriptCanOpenWindowsAutomatically" default:NO];
      */

     // By default, DisallowOverscroll is false (thus bounce is allowed)
     BOOL bounceAllowed = !([settings cordovaBoolSettingForKey:@"DisallowOverscroll" defaultValue:NO]);

     // prevent webView from bouncing
     if (!bounceAllowed) {
         if ([wkWebView respondsToSelector:@selector(scrollView)]) {
             ((UIScrollView*)[wkWebView scrollView]).bounces = NO;
         } else {
             for (id subview in wkWebView.subviews) {
                 if ([[subview class] isSubclassOfClass:[UIScrollView class]]) {
                     ((UIScrollView*)subview).bounces = NO;
                 }
             }
         }
     }

     NSString* decelerationSetting = [settings cordovaSettingForKey:@"WKWebViewDecelerationSpeed"];
     if (!decelerationSetting) {
         // Fallback to the UIWebView-named preference
         decelerationSetting = [settings cordovaSettingForKey:@"UIWebViewDecelerationSpeed"];
     }

     if (![@"fast" isEqualToString:decelerationSetting]) {
         [wkWebView.scrollView setDecelerationRate:UIScrollViewDecelerationRateNormal];
     }
 }

 - (void)updateWithInfo:(NSDictionary*)info
 {
     NSDictionary* scriptMessageHandlers = [info objectForKey:kCDVWebViewEngineScriptMessageHandlers];
     NSDictionary* settings = [info objectForKey:kCDVWebViewEngineWebViewPreferences];
     id navigationDelegate = [info objectForKey:kCDVWebViewEngineWKNavigationDelegate];
     id uiDelegate = [info objectForKey:kCDVWebViewEngineWKUIDelegate];

     WKWebView* wkWebView = (WKWebView*)_engineWebView;

     if (scriptMessageHandlers && [scriptMessageHandlers isKindOfClass:[NSDictionary class]]) {
         NSArray* allKeys = [scriptMessageHandlers allKeys];

         for (NSString* key in allKeys) {
             id object = [scriptMessageHandlers objectForKey:key];
             if ([object conformsToProtocol:@protocol(WKScriptMessageHandler)]) {
                 [wkWebView.configuration.userContentController addScriptMessageHandler:object name:key];
             }
         }
     }

     if (navigationDelegate && [navigationDelegate conformsToProtocol:@protocol(WKNavigationDelegate)]) {
         wkWebView.navigationDelegate = navigationDelegate;
     }

     if (uiDelegate && [uiDelegate conformsToProtocol:@protocol(WKUIDelegate)]) {
         wkWebView.UIDelegate = uiDelegate;
     }

     if (settings && [settings isKindOfClass:[NSDictionary class]]) {
         [self updateSettings:settings];
     }
 }

 // This forwards the methods that are in the header that are not implemented here.
 // Both WKWebView and UIWebView implement the below:
 //     loadHTMLString:baseURL:
 //     loadRequest:
 - (id)forwardingTargetForSelector:(SEL)aSelector
 {
     return _engineWebView;
 }

 - (UIView*)webView
 {
     return self.engineWebView;
 }

 #pragma mark WKScriptMessageHandler implementation

 - (void)userContentController:(WKUserContentController*)userContentController didReceiveScriptMessage:(WKScriptMessage*)message
 {
     if (![message.name isEqualToString:CDV_BRIDGE_NAME]) {
         return;
     }

     CDVViewController* vc = (CDVViewController*)self.viewController;

     NSArray* jsonEntry = message.body; // NSString:callbackId, NSString:service, NSString:action, NSArray:args
     CDVInvokedUrlCommand* command = [CDVInvokedUrlCommand commandFromJson:jsonEntry];
     CDV_EXEC_LOG(@"Exec(%@): Calling %@.%@", command.callbackId, command.className, command.methodName);

     if (![vc.commandQueue execute:command]) {
 #ifdef DEBUG
         NSError* error = nil;
         NSString* commandJson = nil;
         NSData* jsonData = [NSJSONSerialization dataWithJSONObject:jsonEntry
                                                            options:0
                                                              error:&error];

         if (error == nil) {
             commandJson = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
         }

             static NSUInteger maxLogLength = 1024;
             NSString* commandString = ([commandJson length] > maxLogLength) ?
                 [NSString stringWithFormat : @"%@[...]", [commandJson substringToIndex:maxLogLength]] :
                 commandJson;

             NSLog(@"FAILED pluginJSON = %@", commandString);
 #endif
     }
 }

 #pragma mark WKNavigationDelegate implementation

 - (void)webView:(WKWebView*)webView didStartProvisionalNavigation:(WKNavigation*)navigation
 {
     [[NSNotificationCenter defaultCenter] postNotification:[NSNotification notificationWithName:CDVPluginResetNotification object:webView]];
 }

 - (void)webView:(WKWebView*)webView didFinishNavigation:(WKNavigation*)navigation
 {
     CDVViewController* vc = (CDVViewController*)self.viewController;
     [CDVUserAgentUtil releaseLock:vc.userAgentLockToken];

     [[NSNotificationCenter defaultCenter] postNotification:[NSNotification notificationWithName:CDVPageDidLoadNotification object:webView]];
 }

 - (void)webView:(WKWebView*)theWebView didFailNavigation:(WKNavigation*)navigation withError:(NSError*)error
 {
     CDVViewController* vc = (CDVViewController*)self.viewController;
     [CDVUserAgentUtil releaseLock:vc.userAgentLockToken];

     NSString* message = [NSString stringWithFormat:@"Failed to load webpage with error: %@", [error localizedDescription]];
     NSLog(@"%@", message);

     NSURL* errorUrl = vc.errorURL;
     if (errorUrl) {
         errorUrl = [NSURL URLWithString:[NSString stringWithFormat:@"?error=%@", [message stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]] relativeToURL:errorUrl];
         NSLog(@"%@", [errorUrl absoluteString]);
         [theWebView loadRequest:[NSURLRequest requestWithURL:errorUrl]];
     }
 }

 - (void)webViewWebContentProcessDidTerminate:(WKWebView *)webView
 {
     [webView reload];
 }

 - (BOOL)defaultResourcePolicyForURL:(NSURL*)url
 {
     // all file:// urls are allowed
     if ([url isFileURL]) {
         return YES;
     }

     return NO;
 }

 - (void) webView: (WKWebView *) webView decidePolicyForNavigationAction: (WKNavigationAction*) navigationAction decisionHandler: (void (^)(WKNavigationActionPolicy)) decisionHandler
 {
     NSURL* url = [navigationAction.request URL];
     CDVViewController* vc = (CDVViewController*)self.viewController;

     /*
      * Give plugins the chance to handle the url
      */
     BOOL anyPluginsResponded = NO;
     BOOL shouldAllowRequest = NO;

     for (NSString* pluginName in vc.pluginObjects) {
         CDVPlugin* plugin = [vc.pluginObjects objectForKey:pluginName];
         SEL selector = NSSelectorFromString(@"shouldOverrideLoadWithRequest:navigationType:");
         if ([plugin respondsToSelector:selector]) {
             anyPluginsResponded = YES;
             shouldAllowRequest = (((BOOL (*)(id, SEL, id, int))objc_msgSend)(plugin, selector, navigationAction.request, navigationAction.navigationType));
             if (!shouldAllowRequest) {
                 break;
             }
         }
     }

     if (anyPluginsResponded) {
         return decisionHandler(shouldAllowRequest);
     }

     /*
      * Handle all other types of urls (tel:, sms:), and requests to load a url in the main webview.
      */
     BOOL shouldAllowNavigation = [self defaultResourcePolicyForURL:url];
     if (shouldAllowNavigation) {
         return decisionHandler(YES);
     } else {
         [[NSNotificationCenter defaultCenter] postNotification:[NSNotification notificationWithName:CDVPluginHandleOpenURLNotification object:url]];
     }

     return decisionHandler(NO);
 }
 @end
	/*
	Licensed to the Apache Software Foundation (ASF) under one
	or more contributor license agreements. See the NOTICE file
	distributed with this work for additional information
	regarding copyright ownership. The ASF licenses this file
	to you under the Apache License, Version 2.0 (the
	"License"); you may not use this file except in compliance
	with the License. You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

	Unless required by applicable law or agreed to in writing,
	software distributed under the License is distributed on an
	"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	KIND, either express or implied. See the License for the
	specific language governing permissions and limitations
	under the License.
	*/

	#import "CDVWKWebViewEngine.h"
	#import "CDVWKWebViewUIDelegate.h"
	#import <Cordova/NSDictionary+CordovaPreferences.h>

	#import <objc/message.h>

	#define CDV_BRIDGE_NAME @"cordova"
	#define CDV_WKWEBVIEW_FILE_URL_LOAD_SELECTOR @"loadFileURL:allowingReadAccessToURL:"

	@interface CDVWKWebViewEngine ()

	@property (nonatomic, strong, readwrite) UIView* engineWebView;
	@property (nonatomic, strong, readwrite) id <WKUIDelegate> uiDelegate;

	@end

	// see forwardingTargetForSelector: selector comment for the reason for this pragma
	#pragma clang diagnostic ignored "-Wprotocol"

	@implementation CDVWKWebViewEngine

	@synthesize engineWebView = _engineWebView;

	- (instancetype)initWithFrame:(CGRect)frame
	{
	self = [super init];
	if (self) {
	if (NSClassFromString(@"WKWebView") == nil) {
	return nil;
	}
	self.uiDelegate = [[CDVWKWebViewUIDelegate alloc] initWithTitle:[[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleDisplayName"]];

	WKUserContentController* userContentController = [[WKUserContentController alloc] init];
	[userContentController addScriptMessageHandler:self name:CDV_BRIDGE_NAME];

	WKWebViewConfiguration* configuration = [[WKWebViewConfiguration alloc] init];
	configuration.userContentController = userContentController;

	WKWebView* wkWebView = [[WKWebView alloc] initWithFrame:frame configuration:configuration];

	wkWebView.UIDelegate = self.uiDelegate;

	self.engineWebView = wkWebView;

	NSLog(@"Using WKWebView");
	}

	return self;
	}

	- (void)pluginInitialize
	{
	// viewController would be available now. we attempt to set all possible delegates to it, by default

	WKWebView* wkWebView = (WKWebView*)_engineWebView;

	if ([self.viewController conformsToProtocol:@protocol(WKUIDelegate)]) {
	wkWebView.UIDelegate = (id <WKUIDelegate>)self.viewController;
	}

	if ([self.viewController conformsToProtocol:@protocol(WKNavigationDelegate)]) {
	wkWebView.navigationDelegate = (id <WKNavigationDelegate>)self.viewController;
	} else {
	wkWebView.navigationDelegate = (id <WKNavigationDelegate>)self;
	}

	if ([self.viewController conformsToProtocol:@protocol(WKScriptMessageHandler)]) {
	[wkWebView.configuration.userContentController addScriptMessageHandler:(id < WKScriptMessageHandler >)self.viewController name:@"cordova"];
	}

	[self updateSettings:self.commandDelegate.settings];

	// check if content thread has died on resume
	NSLog(@"%@", @"CDVWKWebViewEngine will reload WKWebView if required on resume");
	[[NSNotificationCenter defaultCenter]
	addObserver:self
	selector:@selector(onAppWillEnterForeground:)
	name:UIApplicationWillEnterForegroundNotification object:nil];
	}

	- (void) onAppWillEnterForeground:(NSNotification*)notification {
	[self reloadIfRequired];
	}

	- (BOOL)reloadIfRequired
	{
	WKWebView* wkWebView = (WKWebView*)_engineWebView;
	NSString* title = wkWebView.title;
	BOOL reload = ((title == nil) \|\| [title isEqualToString:@""]);

	#ifdef DEBUG
	NSLog(@"%@", @"CDVWKWebViewEngine reloadIfRequired");
	NSLog(@"CDVWKWebViewEngine reloadIfRequired WKWebView.title: %@", title);
	NSLog(@"CDVWKWebViewEngine reloadIfRequired reload: %u", reload);
	#endif

	if (reload) {
	NSLog(@"%@", @"CDVWKWebViewEngine reloading!");
	[wkWebView reload];
	}
	return reload;
	}

	- (id)loadRequest:(NSURLRequest*)request
	{
	if ([self canLoadRequest:request]) { // can load, differentiate between file urls and other schemes
	if (request.URL.fileURL) {
	SEL wk_sel = NSSelectorFromString(CDV_WKWEBVIEW_FILE_URL_LOAD_SELECTOR);
	NSURL* readAccessUrl = [request.URL URLByDeletingLastPathComponent];
	return ((id (*)(id, SEL, id, id))objc_msgSend)(_engineWebView, wk_sel, request.URL, readAccessUrl);
	} else {
	return [(WKWebView*)_engineWebView loadRequest:request];
	}
	} else { // can't load, print out error
	NSString* errorHtml = [NSString stringWithFormat:
	@"<!doctype html>"
	@"<title>Error</title>"
	@"<div style='font-size:2em'>"
	@" <p>The WebView engine '%@' is unable to load the request: %@</p>"
	@" <p>Most likely the cause of the error is that the loading of file urls is not supported in iOS %@.</p>"
	@"</div>",
	NSStringFromClass([self class]),
	[request.URL description],
	[[UIDevice currentDevice] systemVersion]
	];
	return [self loadHTMLString:errorHtml baseURL:nil];
	}
	}

	- (id)loadHTMLString:(NSString)string baseURL:(NSURL)baseURL
	{
	return [(WKWebView*)_engineWebView loadHTMLString:string baseURL:baseURL];
	}

	- (NSURL*) URL
	{
	return [(WKWebView*)_engineWebView URL];
	}

	- (BOOL) canLoadRequest:(NSURLRequest*)request
	{
	// See: https://issues.apache.org/jira/browse/CB-9636
	SEL wk_sel = NSSelectorFromString(CDV_WKWEBVIEW_FILE_URL_LOAD_SELECTOR);

	// if it's a file URL, check whether WKWebView has the selector (which is in iOS 9 and up only)
	if (request.URL.fileURL) {
	return [_engineWebView respondsToSelector:wk_sel];
	} else {
	return YES;
	}
	}

	- (void)updateSettings:(NSDictionary*)settings
	{
	WKWebView* wkWebView = (WKWebView*)_engineWebView;

	wkWebView.configuration.preferences.minimumFontSize = [settings cordovaFloatSettingForKey:@"MinimumFontSize" defaultValue:0.0];
	wkWebView.configuration.allowsInlineMediaPlayback = [settings cordovaBoolSettingForKey:@"AllowInlineMediaPlayback" defaultValue:NO];
	wkWebView.configuration.mediaPlaybackRequiresUserAction = [settings cordovaBoolSettingForKey:@"MediaPlaybackRequiresUserAction" defaultValue:YES];
	wkWebView.configuration.suppressesIncrementalRendering = [settings cordovaBoolSettingForKey:@"SuppressesIncrementalRendering" defaultValue:NO];
	wkWebView.configuration.mediaPlaybackAllowsAirPlay = [settings cordovaBoolSettingForKey:@"MediaPlaybackAllowsAirPlay" defaultValue:YES];

	/*
	wkWebView.configuration.preferences.javaScriptEnabled = [settings cordovaBoolSettingForKey:@"JavaScriptEnabled" default:YES];
	wkWebView.configuration.preferences.javaScriptCanOpenWindowsAutomatically = [settings cordovaBoolSettingForKey:@"JavaScriptCanOpenWindowsAutomatically" default:NO];
	*/

	// By default, DisallowOverscroll is false (thus bounce is allowed)
	BOOL bounceAllowed = !([settings cordovaBoolSettingForKey:@"DisallowOverscroll" defaultValue:NO]);

	// prevent webView from bouncing
	if (!bounceAllowed) {
	if ([wkWebView respondsToSelector:@selector(scrollView)]) {
	((UIScrollView*)[wkWebView scrollView]).bounces = NO;
	} else {
	for (id subview in wkWebView.subviews) {
	if ([[subview class] isSubclassOfClass:[UIScrollView class]]) {
	((UIScrollView*)subview).bounces = NO;
	}
	}
	}
	}

	NSString* decelerationSetting = [settings cordovaSettingForKey:@"WKWebViewDecelerationSpeed"];
	if (!decelerationSetting) {
	// Fallback to the UIWebView-named preference
	decelerationSetting = [settings cordovaSettingForKey:@"UIWebViewDecelerationSpeed"];
	}

	if (![@"fast" isEqualToString:decelerationSetting]) {
	[wkWebView.scrollView setDecelerationRate:UIScrollViewDecelerationRateNormal];
	}
	}

	- (void)updateWithInfo:(NSDictionary*)info
	{
	NSDictionary* scriptMessageHandlers = [info objectForKey:kCDVWebViewEngineScriptMessageHandlers];
	NSDictionary* settings = [info objectForKey:kCDVWebViewEngineWebViewPreferences];
	id navigationDelegate = [info objectForKey:kCDVWebViewEngineWKNavigationDelegate];
	id uiDelegate = [info objectForKey:kCDVWebViewEngineWKUIDelegate];

	WKWebView* wkWebView = (WKWebView*)_engineWebView;

	if (scriptMessageHandlers && [scriptMessageHandlers isKindOfClass:[NSDictionary class]]) {
	NSArray* allKeys = [scriptMessageHandlers allKeys];

	for (NSString* key in allKeys) {
	id object = [scriptMessageHandlers objectForKey:key];
	if ([object conformsToProtocol:@protocol(WKScriptMessageHandler)]) {
	[wkWebView.configuration.userContentController addScriptMessageHandler:object name:key];
	}
	}
	}

	if (navigationDelegate && [navigationDelegate conformsToProtocol:@protocol(WKNavigationDelegate)]) {
	wkWebView.navigationDelegate = navigationDelegate;
	}

	if (uiDelegate && [uiDelegate conformsToProtocol:@protocol(WKUIDelegate)]) {
	wkWebView.UIDelegate = uiDelegate;
	}

	if (settings && [settings isKindOfClass:[NSDictionary class]]) {
	[self updateSettings:settings];
	}
	}

	// This forwards the methods that are in the header that are not implemented here.
	// Both WKWebView and UIWebView implement the below:
	// loadHTMLString:baseURL:
	// loadRequest:
	- (id)forwardingTargetForSelector:(SEL)aSelector
	{
	return _engineWebView;
	}

	- (UIView*)webView
	{
	return self.engineWebView;
	}

	#pragma mark WKScriptMessageHandler implementation

	- (void)userContentController:(WKUserContentController)userContentController didReceiveScriptMessage:(WKScriptMessage)message
	{
	if (![message.name isEqualToString:CDV_BRIDGE_NAME]) {
	return;
	}

	CDVViewController* vc = (CDVViewController*)self.viewController;

	NSArray* jsonEntry = message.body; // NSString:callbackId, NSString:service, NSString:action, NSArray:args
	CDVInvokedUrlCommand* command = [CDVInvokedUrlCommand commandFromJson:jsonEntry];
	CDV_EXEC_LOG(@"Exec(%@): Calling %@.%@", command.callbackId, command.className, command.methodName);

	if (![vc.commandQueue execute:command]) {
	#ifdef DEBUG
	NSError* error = nil;
	NSString* commandJson = nil;
	NSData* jsonData = [NSJSONSerialization dataWithJSONObject:jsonEntry
	options:0
	error:&error];

	if (error == nil) {
	commandJson = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
	}

	static NSUInteger maxLogLength = 1024;
	NSString* commandString = ([commandJson length] > maxLogLength) ?
	[NSString stringWithFormat : @"%@[...]", [commandJson substringToIndex:maxLogLength]] :
	commandJson;

	NSLog(@"FAILED pluginJSON = %@", commandString);
	#endif
	}
	}

	#pragma mark WKNavigationDelegate implementation

	- (void)webView:(WKWebView)webView didStartProvisionalNavigation:(WKNavigation)navigation
	{
	[[NSNotificationCenter defaultCenter] postNotification:[NSNotification notificationWithName:CDVPluginResetNotification object:webView]];
	}

	- (void)webView:(WKWebView)webView didFinishNavigation:(WKNavigation)navigation
	{
	CDVViewController* vc = (CDVViewController*)self.viewController;
	[CDVUserAgentUtil releaseLock:vc.userAgentLockToken];

	[[NSNotificationCenter defaultCenter] postNotification:[NSNotification notificationWithName:CDVPageDidLoadNotification object:webView]];
	}

	- (void)webView:(WKWebView)theWebView didFailNavigation:(WKNavigation)navigation withError:(NSError*)error
	{
	CDVViewController* vc = (CDVViewController*)self.viewController;
	[CDVUserAgentUtil releaseLock:vc.userAgentLockToken];

	NSString* message = [NSString stringWithFormat:@"Failed to load webpage with error: %@", [error localizedDescription]];
	NSLog(@"%@", message);

	NSURL* errorUrl = vc.errorURL;
	if (errorUrl) {
	errorUrl = [NSURL URLWithString:[NSString stringWithFormat:@"?error=%@", [message stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]] relativeToURL:errorUrl];
	NSLog(@"%@", [errorUrl absoluteString]);
	[theWebView loadRequest:[NSURLRequest requestWithURL:errorUrl]];
	}
	}

	- (void)webViewWebContentProcessDidTerminate:(WKWebView *)webView
	{
	[webView reload];
	}

	- (BOOL)defaultResourcePolicyForURL:(NSURL*)url
	{
	// all file:// urls are allowed
	if ([url isFileURL]) {
	return YES;
	}

	return NO;
	}

	- (void) webView: (WKWebView ) webView decidePolicyForNavigationAction: (WKNavigationAction) navigationAction decisionHandler: (void (^)(WKNavigationActionPolicy)) decisionHandler
	{
	NSURL* url = [navigationAction.request URL];
	CDVViewController* vc = (CDVViewController*)self.viewController;

	/*
	* Give plugins the chance to handle the url
	*/
	BOOL anyPluginsResponded = NO;
	BOOL shouldAllowRequest = NO;

	for (NSString* pluginName in vc.pluginObjects) {
	CDVPlugin* plugin = [vc.pluginObjects objectForKey:pluginName];
	SEL selector = NSSelectorFromString(@"shouldOverrideLoadWithRequest:navigationType:");
	if ([plugin respondsToSelector:selector]) {
	anyPluginsResponded = YES;
	shouldAllowRequest = (((BOOL (*)(id, SEL, id, int))objc_msgSend)(plugin, selector, navigationAction.request, navigationAction.navigationType));
	if (!shouldAllowRequest) {
	break;
	}
	}
	}

	if (anyPluginsResponded) {
	return decisionHandler(shouldAllowRequest);
	}

	/*
	* Handle all other types of urls (tel:, sms:), and requests to load a url in the main webview.
	*/
	BOOL shouldAllowNavigation = [self defaultResourcePolicyForURL:url];
	if (shouldAllowNavigation) {
	return decisionHandler(YES);
	} else {
	[[NSNotificationCenter defaultCenter] postNotification:[NSNotification notificationWithName:CDVPluginHandleOpenURLNotification object:url]];
	}

	return decisionHandler(NO);
	}
	@end