LanguageResourceFullID protocol

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Summary

The LanguageResourceFullID protocol and the types that implement it (FullKeyboardID and FullLexicalModelID) represent unique identifiers for installed resource-language pairings of keyboards and lexical models within the KeymanEngine.

FullKeyboardID and FullLexicalModelID (both of which implement this protocol) are designed as a 'higher level' and 'friendlier' analogue to their corresponding LanguageResources and are safe to construct dynamically for use in any of KeymanEngine's API functions.

Syntax

LanguageResourceFullID.fieldName

Description

The LanguageResourceFullID protocol is frequently used for lookup operations within the KeymanEngine, as it represents the minimal amount of data needed to uniquely identify an installation for any LanguageResource. Both FullKeyboardID (for keyboards) and FullLexicalModelID (for lexical models) implement this protocol, allowing methods to be written that can handle either resource type. Also note the existence of AnyLanguageResourceFullID, which serves a "type erasure" role for classes implementing this protocol.

Associated Types

Resource:LanguageResource

The type of LanguageResource represented by this type.

Fields

id: String

The resource's internal name. This must be unique among all resources of the same type and follows standard unique ID constraints: a-z, A-Z, 0-9, and underscores only.

languageID: String

One language paired with this resource during installation.

type: LanguageResourceType

An enum representing resource types supported by the KeymanEngine. May be either .keyboard (for FullKeyboardID) or .lexicalModel (for FullLexicalModelID).

Example: Using FullKeyboardID to install a keyboard

The following script illustrates the use of FullKeyboardID, which implements this protocol:

let packageURL = Bundle.main.url(forResource: "sil_euro_latin", withExtension: "kmp")!
let keyboardID = FullKeyboardID("sil_euro_latin", "fr") // Marks the keyboard for use with French.

if let keyboardPackage = try ResourceFileManager.shared.prepareKMPInstall(packageURL) as? KeyboardKeymanPackage {
  // Gets the all of the package's metadata for the specified resource, without installing it.
  // Returned type:  InstallableKeyboard
  let keyboard = keyboardPackage.findResource(withID: keyboardID)
  // ...
}

History

While the classes that implement the protocol existed before this, the protocol itself was added in Keyman Engine for iPhone and iPad 14.0.

See Also

LanguageResource

Represents all metadata used internally by the KeymanEngine for installed keyboards and lexical models.