// // FLEXWebViewController.m // Flipboard // // Created by Ryan Olson on 6/10/14. // Copyright (c) 2014 Flipboard. All rights reserved. // #import "FLEXWebViewController.h" #import "FLEXUtility.h" #import @interface FLEXWebViewController () @property (nonatomic) WKWebView *webView; @property (nonatomic) NSString *originalText; @end @implementation FLEXWebViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { WKWebViewConfiguration *configuration = [WKWebViewConfiguration new]; if (@available(iOS 10.0, *)) { configuration.dataDetectorTypes = UIDataDetectorTypeLink; } self.webView = [[WKWebView alloc] initWithFrame:CGRectZero configuration:configuration]; self.webView.navigationDelegate = self; } return self; } - (id)initWithText:(NSString *)text { self = [self initWithNibName:nil bundle:nil]; if (self) { self.originalText = text; NSString *htmlString = [NSString stringWithFormat:@"

%@

", [FLEXUtility stringByEscapingHTMLEntitiesInString:text]]; [self.webView loadHTMLString:htmlString baseURL:nil]; } return self; } - (id)initWithURL:(NSURL *)url { self = [self initWithNibName:nil bundle:nil]; if (self) { NSURLRequest *request = [NSURLRequest requestWithURL:url]; [self.webView loadRequest:request]; } return self; } - (void)dealloc { // WKWebView's delegate is assigned so we need to clear it manually. if (_webView.navigationDelegate == self) { _webView.navigationDelegate = nil; } } - (void)viewDidLoad { [super viewDidLoad]; [self.view addSubview:self.webView]; self.webView.frame = self.view.bounds; self.webView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; if (self.originalText.length > 0) { self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Copy" style:UIBarButtonItemStylePlain target:self action:@selector(copyButtonTapped:)]; } } - (void)copyButtonTapped:(id)sender { [UIPasteboard.generalPasteboard setString:self.originalText]; } #pragma mark - WKWebView Delegate - (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler { WKNavigationActionPolicy policy = WKNavigationActionPolicyCancel; if (navigationAction.navigationType == WKNavigationTypeOther) { // Allow the initial load policy = WKNavigationActionPolicyAllow; } else { // For clicked links, push another web view controller onto the navigation stack so that hitting the back button works as expected. // Don't allow the current web view to handle the navigation. NSURLRequest *request = navigationAction.request; FLEXWebViewController *webVC = [[[self class] alloc] initWithURL:[request URL]]; webVC.title = [[request URL] absoluteString]; [self.navigationController pushViewController:webVC animated:YES]; } decisionHandler(policy); } #pragma mark - Class Helpers + (BOOL)supportsPathExtension:(NSString *)extension { BOOL supported = NO; NSSet *supportedExtensions = [self webViewSupportedPathExtensions]; if ([supportedExtensions containsObject:[extension lowercaseString]]) { supported = YES; } return supported; } + (NSSet *)webViewSupportedPathExtensions { static NSSet *pathExtensions = nil; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ // Note that this is not exhaustive, but all these extensions should work well in the web view. // See https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/CreatingContentforSafarioniPhone/CreatingContentforSafarioniPhone.html#//apple_ref/doc/uid/TP40006482-SW7 pathExtensions = [NSSet setWithArray:@[@"jpg", @"jpeg", @"png", @"gif", @"pdf", @"svg", @"tiff", @"3gp", @"3gpp", @"3g2", @"3gp2", @"aiff", @"aif", @"aifc", @"cdda", @"amr", @"mp3", @"swa", @"mp4", @"mpeg", @"mpg", @"mp3", @"wav", @"bwf", @"m4a", @"m4b", @"m4p", @"mov", @"qt", @"mqv", @"m4v"]]; }); return pathExtensions; } @end