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| 1 | +// |
| 2 | +// LSKit.swift |
| 3 | +// LSKit |
| 4 | +// |
| 5 | +// Created by Armin Briegel on 2021-08-30. |
| 6 | +// |
| 7 | + |
| 8 | +import Foundation |
| 9 | +import AppKit |
| 10 | +import UniformTypeIdentifiers |
| 11 | + |
| 12 | +class LSKit { |
| 13 | + |
| 14 | + /** |
| 15 | + returns a list of URLs to applications that can open URLs starting with the scheme |
| 16 | + - Parameter scheme: url scheme (excluding the `:` or `/`, e.g. `http`) |
| 17 | + - Returns: array of app URLs |
| 18 | + */ |
| 19 | + static func appURLs(forScheme scheme: String) -> [URL] { |
| 20 | + guard let url = URL(string: "\(scheme):") else { return [URL]() } |
| 21 | + |
| 22 | + if #available(macOS 12, *) { |
| 23 | + //print("running on macOS 12, using NSWorkspace") |
| 24 | + let ws = NSWorkspace.shared |
| 25 | + return ws.urlsForApplications(toOpen: url) |
| 26 | + } else { |
| 27 | + var urlList = [URL]() |
| 28 | + if let result = LSCopyApplicationURLsForURL(url as CFURL, .all) { |
| 29 | + let cfURLList = result.takeRetainedValue() as Array |
| 30 | + for item in cfURLList { |
| 31 | + if let appURL = item as? URL { |
| 32 | + urlList.append(appURL) |
| 33 | + } |
| 34 | + } |
| 35 | + } |
| 36 | + return urlList |
| 37 | + } |
| 38 | + } |
| 39 | + |
| 40 | + /** |
| 41 | + returns URL to the default application for URLs starting with scheme |
| 42 | + - Parameter scheme: url scheme (excluding the `:` or `/`, e.g. `http`) |
| 43 | + - Returns: urls to default application |
| 44 | + */ |
| 45 | + static func defaultAppURL(forScheme scheme: String) -> URL? { |
| 46 | + guard let url = URL(string: "\(scheme):") else { return nil } |
| 47 | + |
| 48 | + if #available(macOS 12, *) { |
| 49 | + //print("running on macOS 12, using NSWorkspace") |
| 50 | + let ws = NSWorkspace.shared |
| 51 | + return ws.urlForApplication(toOpen: url) |
| 52 | + } else { |
| 53 | + if let result = LSCopyDefaultApplicationURLForURL(url as CFURL, .all, nil) { |
| 54 | + let appURL = result.takeRetainedValue() as URL |
| 55 | + return appURL |
| 56 | + } |
| 57 | + return nil |
| 58 | + } |
| 59 | + } |
| 60 | + |
| 61 | + /** |
| 62 | + set the default app for scheme to the app with the identifier |
| 63 | + - Parameters: |
| 64 | + - identifier: bundle id of the new default application |
| 65 | + - scheme: url scheme (excluding the `:` or `/`, e.g. `http`) |
| 66 | + - Returns: OSStatus (discardable) |
| 67 | + */ |
| 68 | + @discardableResult static func setDefaultApp(identifier: String, forScheme scheme: String) -> OSStatus { |
| 69 | + if #available(macOS 12, *) { |
| 70 | + // print("running on macOS 12, using NSWorkspace") |
| 71 | + let ws = NSWorkspace.shared |
| 72 | + |
| 73 | + // since the new NSWorkspace function is asynchronous we have to use semaphores here |
| 74 | + let semaphore = DispatchSemaphore(value: 0) |
| 75 | + var errCode: OSStatus = 0 |
| 76 | + |
| 77 | + guard let appURL = ws.urlForApplication(withBundleIdentifier: identifier) else { return 1 } |
| 78 | + ws.setDefaultApplication(at: appURL, toOpenURLsWithScheme: scheme) { err in |
| 79 | + // err is an NSError wrapped in a CocoaError |
| 80 | + if let err = err as? CocoaError { |
| 81 | + if let underlyingError = err.errorUserInfo["NSUnderlyingError"] as? NSError { |
| 82 | + errCode = OSStatus(clamping: underlyingError.code) |
| 83 | + } |
| 84 | + } |
| 85 | + semaphore.signal() |
| 86 | + } |
| 87 | + semaphore.wait() |
| 88 | + return errCode |
| 89 | + } else { |
| 90 | + return LSSetDefaultHandlerForURLScheme(scheme as CFString, identifier as CFString) |
| 91 | + } |
| 92 | + } |
| 93 | + |
| 94 | + /** |
| 95 | + returns a list of URLs to applications that can open the given type identifier |
| 96 | + - Parameter forTypeIdentifier: Uniform Type Identifier, e.g. `public.html` |
| 97 | + - Returns: array of URLs to apps |
| 98 | + */ |
| 99 | + static func appURLs(forTypeIdentifier utidentifier: String) -> [URL] { |
| 100 | + if #available(macOS 12, *) { |
| 101 | + print("running on macOS 12, using NSWorkspace") |
| 102 | + let ws = NSWorkspace.shared |
| 103 | + guard let utype = UTType(utidentifier) else { |
| 104 | + return [URL]() |
| 105 | + } |
| 106 | + return ws.urlsForApplications(toOpen: utype) |
| 107 | + } else { |
| 108 | + var urlList = [URL]() |
| 109 | + if let result = LSCopyAllRoleHandlersForContentType(utidentifier as CFString, .all) { |
| 110 | + let cfURLList = result.takeRetainedValue() as Array |
| 111 | + for item in cfURLList { |
| 112 | + if let appURL = item as? URL { |
| 113 | + urlList.append(appURL) |
| 114 | + } |
| 115 | + } |
| 116 | + } |
| 117 | + return urlList |
| 118 | + } |
| 119 | + } |
| 120 | + |
| 121 | + /** |
| 122 | + returns URL to the default application for the given type identifier |
| 123 | + - Parameter forTypeIdentifier: url scheme (excluding the `:` or `/`, e.g. `http`) |
| 124 | + - Returns: url to default application |
| 125 | + */ |
| 126 | + static func defaultAppURL(forTypeIdentifier utidentifier: String) -> URL? { |
| 127 | + if #available(macOS 12, *) { |
| 128 | + //print("running on macOS 12, using NSWorkspace") |
| 129 | + guard let utype = UTType(utidentifier) else { |
| 130 | + return nil |
| 131 | + } |
| 132 | + let ws = NSWorkspace.shared |
| 133 | + return ws.urlForApplication(toOpen: utype) |
| 134 | + } else { |
| 135 | + if let result = LSCopyDefaultApplicationURLForContentType(utidentifier as CFString, .all, nil) { |
| 136 | + let appURL = result.takeRetainedValue() as URL |
| 137 | + return appURL |
| 138 | + } |
| 139 | + return nil |
| 140 | + } |
| 141 | + } |
| 142 | + |
| 143 | + /** |
| 144 | + set the default app for type identifier to the app with the bundle indentifier |
| 145 | + - Parameters: |
| 146 | + - identifier: bundle id of the new default application |
| 147 | + - forTypeIdentifier: uniform type identifier ( e.g. `public.html`) |
| 148 | + - Returns: OSStatus (discardable) |
| 149 | + */ |
| 150 | + @discardableResult static func setDefaultApp(identifier: String, forTypeIdentifier utidentifier: String) -> OSStatus { |
| 151 | + if #available(macOS 12, *) { |
| 152 | + // print("running on macOS 12, using NSWorkspace") |
| 153 | + guard let utype = UTType(utidentifier) else { |
| 154 | + return 1 |
| 155 | + } |
| 156 | + |
| 157 | + let ws = NSWorkspace.shared |
| 158 | + |
| 159 | + // since the new NSWorkspace function is asynchronous we have to use semaphores here |
| 160 | + let semaphore = DispatchSemaphore(value: 0) |
| 161 | + var errCode: OSStatus = 0 |
| 162 | + |
| 163 | + guard let appURL = ws.urlForApplication(withBundleIdentifier: identifier) else { return 1 } |
| 164 | + ws.setDefaultApplication(at: appURL, toOpen: utype) { err in |
| 165 | + // err is an NSError wrapped in a CocoaError |
| 166 | + if let err = err as? CocoaError { |
| 167 | + if let underlyingError = err.errorUserInfo["NSUnderlyingError"] as? NSError { |
| 168 | + errCode = OSStatus(clamping: underlyingError.code) |
| 169 | + } |
| 170 | + } |
| 171 | + semaphore.signal() |
| 172 | + } |
| 173 | + semaphore.wait() |
| 174 | + return errCode |
| 175 | + } else { |
| 176 | + return LSSetDefaultRoleHandlerForContentType(utidentifier as CFString, .all, identifier as CFString) |
| 177 | + } |
| 178 | + } |
| 179 | +} |
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