[macOS][Cocoa][Swift]IMEを変更させる

# IMEの変更

## ソース

```swift
import Cocoa
import InputMethodKit

class InputSource {
    fileprivate static var inputSources: [TISInputSource] {
        let inputSourceNSArray = TISCreateInputSourceList(nil, false).takeRetainedValue() as NSArray
        return inputSourceNSArray as! [TISInputSource]
    }
    
    fileprivate static var selectCapableInputSources: [TISInputSource] {
        return inputSources.filter({ $0.isSelectCapable })
    }
    
    static func change(id: String) {
        guard let inputSource = selectCapableInputSources.filter({ $0.id == id }).first else { return }
        TISSelectInputSource(inputSource)
    }
    
    // 確認用
    static func print() {
        for source in inputSources {
            Swift.print("id:[\(source.id)]")
            Swift.print("localizedName:[\(source.localizedName)]")
            Swift.print("isSelectCapable:[\(source.isSelectCapable)]")
            Swift.print("isSelected:[\(source.isSelected)]")
            Swift.print("sourceLanguages:[\(source.sourceLanguages)]")
            Swift.print("--------------------")
        }
    }
}

extension TISInputSource {
    func getProperty(_ key: CFString) -> AnyObject? {
        guard let cfType = TISGetInputSourceProperty(self, key) else { return nil }
        return Unmanaged<AnyObject>.fromOpaque(cfType).takeUnretainedValue()
    }
    
    var id: String {
        return getProperty(kTISPropertyInputSourceID) as! String
    }
    
    var localizedName: String {
        return getProperty(kTISPropertyLocalizedName) as! String
    }
    
    var isSelectCapable: Bool {
        return getProperty(kTISPropertyInputSourceIsSelectCapable) as! Bool
    }
    
    var isSelected: Bool {
        return getProperty(kTISPropertyInputSourceIsSelected) as! Bool
    }
    
    var sourceLanguages: [String] {
        return getProperty(kTISPropertyInputSourceLanguages) as! [String]
    }
}
```

```swift
// IMEを変更
InputSource.change(id: "com.google.inputmethod.Japanese.base")
```

## 確認用の出力結果

```
id:[com.apple.inputmethod.Kotoeri.Japanese]
localizedName:[Hiragana]
isSelectCapable:[true]
isSelected:[false]
sourceLanguages:[["ja"]]
--------------------
id:[com.apple.inputmethod.Kotoeri.Roman]
localizedName:[Romaji]
isSelectCapable:[true]
isSelected:[false]
sourceLanguages:[["en"]]
--------------------
id:[com.apple.inputmethod.Kotoeri]
localizedName:[Japanese]
isSelectCapable:[false]
isSelected:[false]
sourceLanguages:[["ja", "en"]]
--------------------
id:[com.apple.inputmethod.Kotoeri.Japanese.Katakana]
localizedName:[Katakana]
isSelectCapable:[true]
isSelected:[false]
sourceLanguages:[["ja"]]
--------------------
id:[com.apple.CharacterPaletteIM]
localizedName:[Emoji & Symbols]
isSelectCapable:[true]
isSelected:[false]
sourceLanguages:[["en"]]
--------------------
id:[com.apple.50onPaletteIM]
localizedName:[Japanese Kana Palette]
isSelectCapable:[true]
isSelected:[false]
sourceLanguages:[["ja"]]
--------------------
id:[com.apple.inputmethod.Kotoeri.Japanese.HalfWidthKana]
localizedName:[Half-width Katakana]
isSelectCapable:[true]
isSelected:[false]
sourceLanguages:[["ja"]]
--------------------
id:[com.google.inputmethod.Japanese.Katakana]
localizedName:[Katakana (Google)]
isSelectCapable:[true]
isSelected:[false]
sourceLanguages:[["ja"]]
--------------------
id:[com.google.inputmethod.Japanese.HalfWidthKana]
localizedName:[Half-width Katakana (Google)]
isSelectCapable:[true]
isSelected:[false]
sourceLanguages:[["ja"]]
--------------------
id:[com.google.inputmethod.Japanese.Roman]
localizedName:[Alphanumeric (Google)]
isSelectCapable:[true]
isSelected:[true]
sourceLanguages:[["en"]]
--------------------
id:[com.google.inputmethod.Japanese.FullWidthRoman]
localizedName:[Full-width Alphanumeric (Google)]
isSelectCapable:[true]
isSelected:[false]
sourceLanguages:[["ja"]]
--------------------
id:[com.google.inputmethod.Japanese.base]
localizedName:[Hiragana (Google)]
isSelectCapable:[true]
isSelected:[false]
sourceLanguages:[["ja"]]
--------------------
id:[com.google.inputmethod.Japanese]
localizedName:[Google Japanese Input]
isSelectCapable:[false]
isSelected:[false]
sourceLanguages:[["ja", "en"]]
--------------------
```