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//// FLEXWebViewController.m// Flipboard//// Created by Ryan Olson on 6/10/14.// Copyright (c) 2014 Flipboard. All rights reserved.//
#import "FLEXWebViewController.h"#import "FLEXUtility.h"
@interface FLEXWebViewController () <UIWebViewDelegate>
@property (nonatomic, strong) UIWebView *webView;@property (nonatomic, strong) NSString *originalText;
@end
@implementation FLEXWebViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{ self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { self.webView = [[UIWebView alloc] init]; self.webView.delegate = self; self.webView.dataDetectorTypes = UIDataDetectorTypeLink; self.webView.scalesPageToFit = YES; } return self;}
- (id)initWithText:(NSString *)text{ self = [self initWithNibName:nil bundle:nil]; if (self) { self.originalText = text; NSString *htmlString = [NSString stringWithFormat:@"<head><meta name='viewport' content='initial-scale=1.0'></head><body><pre>%@</pre></body>", [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{ // UIWebView's delegate is assign so we need to clear it manually. if (_webView.delegate == self) { _webView.delegate = 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 - UIWebView Delegate
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{ BOOL shouldStart = NO; if (navigationType == UIWebViewNavigationTypeOther) { // Allow the initial load shouldStart = YES; } 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 do handle the navigation. FLEXWebViewController *webVC = [[[self class] alloc] initWithURL:[request URL]]; webVC.title = [[request URL] absoluteString]; [self.navigationController pushViewController:webVC animated:YES]; } return shouldStart;}
#pragma mark - Class Helpers
+ (BOOL)supportsPathExtension:(NSString *)extension{ BOOL supported = NO; NSSet<NSString *> *supportedExtensions = [self webViewSupportedPathExtensions]; if ([supportedExtensions containsObject:[extension lowercaseString]]) { supported = YES; } return supported;}
+ (NSSet<NSString *> *)webViewSupportedPathExtensions{ static NSSet<NSString *> *pathExtenstions = 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/ios/documentation/AppleApplications/Reference/SafariWebContent/CreatingContentforSafarioniPhone/CreatingContentforSafarioniPhone.html#//apple_ref/doc/uid/TP40006482-SW7 pathExtenstions = [NSSet<NSString *> 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 pathExtenstions;}
@end
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