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MasterPassword/External/google-plus-ios-sdk/OpenSource/OpenInChromeController.m

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// Copyright 2012, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#import <UIKit/UIKit.h>
#import "OpenInChromeController.h"
static NSString * const kGoogleChromeHTTPScheme = @"googlechrome:";
static NSString * const kGoogleChromeHTTPSScheme = @"googlechromes:";
static NSString * const kGoogleChromeCallbackScheme =
@"googlechrome-x-callback:";
static NSString * encodeByAddingPercentEscapes(NSString *input) {
NSString *encodedValue =
(NSString *)CFURLCreateStringByAddingPercentEscapes(
kCFAllocatorDefault,
(CFStringRef)input,
NULL,
(CFStringRef)@"!*'();:@&=+$,/?%#[]",
kCFStringEncodingUTF8);
return [encodedValue autorelease];
}
@implementation OpenInChromeController
+ (OpenInChromeController *)sharedInstance {
static OpenInChromeController *sharedInstance;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
sharedInstance = [[self alloc] init];
});
return sharedInstance;
}
- (BOOL)isChromeInstalled {
NSURL *simpleURL = [NSURL URLWithString:kGoogleChromeHTTPScheme];
NSURL *callbackURL = [NSURL URLWithString:kGoogleChromeCallbackScheme];
return [[UIApplication sharedApplication] canOpenURL:simpleURL] ||
[[UIApplication sharedApplication] canOpenURL:callbackURL];
}
- (BOOL)openInChrome:(NSURL *)url {
return [self openInChrome:url withCallbackURL:nil createNewTab:NO];
}
- (BOOL)openInChrome:(NSURL *)url
withCallbackURL:(NSURL *)callbackURL
createNewTab:(BOOL)createNewTab {
NSURL *chromeSimpleURL = [NSURL URLWithString:kGoogleChromeHTTPScheme];
NSURL *chromeCallbackURL = [NSURL URLWithString:kGoogleChromeCallbackScheme];
if ([[UIApplication sharedApplication] canOpenURL:chromeCallbackURL]) {
NSString *appName =
[[NSBundle mainBundle]
objectForInfoDictionaryKey:@"CFBundleDisplayName"];
NSString *scheme = [url.scheme lowercaseString];
// Proceed only if scheme is http or https.
if ([scheme isEqualToString:@"http"] ||
[scheme isEqualToString:@"https"]) {
NSMutableString *chromeURLString = [NSMutableString string];
[chromeURLString appendFormat:
@"%@//x-callback-url/open/?x-source=%@&url=%@",
kGoogleChromeCallbackScheme,
encodeByAddingPercentEscapes(appName),
encodeByAddingPercentEscapes([url absoluteString])];
if (callbackURL) {
[chromeURLString appendFormat:@"&x-success=%@",
encodeByAddingPercentEscapes([callbackURL absoluteString])];
}
if (createNewTab) {
[chromeURLString appendString:@"&create-new-tab"];
}
NSURL *chromeURL = [NSURL URLWithString:chromeURLString];
// Open the URL with Google Chrome.
return [[UIApplication sharedApplication] openURL:chromeURL];
}
} else if ([[UIApplication sharedApplication] canOpenURL:chromeSimpleURL]) {
NSString *scheme = [url.scheme lowercaseString];
// Replace the URL Scheme with the Chrome equivalent.
NSString *chromeScheme = nil;
if ([scheme isEqualToString:@"http"]) {
chromeScheme = kGoogleChromeHTTPScheme;
} else if ([scheme isEqualToString:@"https"]) {
chromeScheme = kGoogleChromeHTTPSScheme;
}
// Proceed only if a valid Google Chrome URI Scheme is available.
if (chromeScheme) {
NSString *absoluteString = [url absoluteString];
NSRange rangeForScheme = [absoluteString rangeOfString:@":"];
NSString *urlNoScheme =
[absoluteString substringFromIndex:rangeForScheme.location + 1];
NSString *chromeURLString =
[chromeScheme stringByAppendingString:urlNoScheme];
NSURL *chromeURL = [NSURL URLWithString:chromeURLString];
// Open the URL with Google Chrome.
return [[UIApplication sharedApplication] openURL:chromeURL];
}
}
return NO;
}
@end