feat(web): add Keyboard and KMXKeyboard classes

The `Keyboard` class can be either a JS or KMX keyboard. Also make use
of the `Keyboard` class where it makes sense and add TODOs in the places
that still need to be implemented for KMX keyboard support.

web/src/app/browser/src/beepHandler.ts

@@ -1,4 +1,5 @@
 import { type JSKeyboardInterface } from 'keyman/engine/js-processor';
+import { JSKeyboard, type KeyboardMinimalInterface } from 'keyman/engine/keyboard';
 import { DesignIFrame, OutputTarget } from 'keyman/engine/element-wrappers';
 
 // Utility object used to handle beep (keyboard error response) operations.
@@ -17,9 +18,9 @@ class BeepData {
 }
 
 export class BeepHandler {
-  readonly keyboardInterface: JSKeyboardInterface;
+  readonly keyboardInterface: KeyboardMinimalInterface;
 
-  constructor(keyboardInterface: JSKeyboardInterface) {
+  constructor(keyboardInterface: KeyboardMinimalInterface) {
     this.keyboardInterface = keyboardInterface;
   }
 
@@ -75,11 +76,13 @@ export class BeepHandler {
    * Description  Reset/terminate beep or flash (not currently used: Aug 2011)
    */
   readonly reset = () => {
-    this.keyboardInterface.resetContextCache();
+    // TODO-web-core: implement for KMX keyboards if needed
+    if (this.keyboardInterface.activeKeyboard instanceof JSKeyboard) {
+      (this.keyboardInterface as JSKeyboardInterface).resetContextCache();
+    }
 
-    var Lbo;
     this._BeepTimeout = 0;
-    for(Lbo=0;Lbo<this._BeepObjects.length;Lbo++) { // I1511 - array prototype extended
+    for(let Lbo=0;Lbo<this._BeepObjects.length;Lbo++) { // I1511 - array prototype extended
       this._BeepObjects[Lbo].reset();
     }
     this._BeepObjects = [];

web/src/app/browser/src/contextManager.ts

@@ -1,4 +1,4 @@
-import { type JSKeyboard, KeyboardScriptError } from 'keyman/engine/keyboard';
+import { JSKeyboard, type Keyboard, KeyboardScriptError } from 'keyman/engine/keyboard';
 import { type KeyboardStub } from 'keyman/engine/keyboard-storage';
 import { CookieSerializer } from 'keyman/engine/dom-utils';
 import { eventOutputTarget, outputTargetForElement, PageContextAttachment } from 'keyman/engine/attachment';
@@ -23,10 +23,12 @@ export interface KeyboardCookie {
  * has the same directionality, text runs will be re-ordered which is confusing and causes
  * incorrect caret positioning
  *
- * @param       {Object}      Ptarg      Target element
+ * @param       {Object}      Ptarg           Target element
+ * @param       {Keyboard}    activeKeyboard  The active keyboard
  */
-function _SetTargDir(Ptarg: HTMLElement, activeKeyboard: JSKeyboard) {
-  const elDir = activeKeyboard?.isRTL ? 'rtl' : 'ltr';
+function _SetTargDir(Ptarg: HTMLElement, activeKeyboard: Keyboard) {
+  // TODO-web-core: do we need to support RTL in Core?
+  const elDir = activeKeyboard instanceof JSKeyboard && activeKeyboard?.isRTL ? 'rtl' : 'ltr';
 
   if(Ptarg) {
     if(Ptarg instanceof Ptarg.ownerDocument.defaultView.HTMLInputElement

web/src/app/browser/src/keymanEngine.ts

@@ -7,7 +7,7 @@ import {
   VisualKeyboard
 } from 'keyman/engine/osk';
 import { ErrorStub, KeyboardStub, CloudQueryResult, toPrefixedKeyboardId as prefixed } from 'keyman/engine/keyboard-storage';
-import { DeviceSpec, JSKeyboard } from "keyman/engine/keyboard";
+import { DeviceSpec, JSKeyboard, Keyboard } from "keyman/engine/keyboard";
 import KeyboardObject = KeymanWebKeyboard.KeyboardObject;
 
 import * as views from './viewsAnchorpoint.js';
@@ -425,7 +425,7 @@ export default class KeymanEngine extends KeymanEngineBase<BrowserConfiguration,
    * See https://help.keyman.com/developer/engine/web/current-version/reference/core/isCJK
    */
   public isCJK(k0?: KeyboardObject | ReturnType<KeymanEngine['_GetKeyboardDetail']> /* [b/c Toolbar UI]*/) {
-    let kbd: JSKeyboard;
+    let kbd: Keyboard;
     if(k0) {
       let kbdDetail = k0 as ReturnType<KeymanEngine['_GetKeyboardDetail']>;
       if(kbdDetail.KeyboardID){
@@ -437,7 +437,8 @@ export default class KeymanEngine extends KeymanEngineBase<BrowserConfiguration,
       kbd = this.core.activeKeyboard;
     }
 
-    return kbd && kbd.isCJK;
+    // TODO-web-core: implement for KMX keyboards if needed
+    return kbd && kbd instanceof JSKeyboard && kbd.isCJK;
   }
 
   /**
@@ -453,7 +454,12 @@ export default class KeymanEngine extends KeymanEngineBase<BrowserConfiguration,
     const stub = this.keyboardRequisitioner.cache.getStub(PInternalName, PlgCode);
     const keyboard = this.keyboardRequisitioner.cache.getKeyboardForStub(stub);
 
-    return stub && this._GetKeyboardDetail(stub, keyboard);
+    if (keyboard instanceof JSKeyboard) {
+      return stub && this._GetKeyboardDetail(stub, keyboard);
+    } else {
+      // TODO-web-core: implement for KMX keyboards if needed
+      return null;
+    }
   }
 
   /**
@@ -478,8 +484,12 @@ export default class KeymanEngine extends KeymanEngineBase<BrowserConfiguration,
       // In Chrome, (including on Android), Array.prototype.find() requires Chrome 45.
       // This is a later version than the default on our oldest-supported Android devices.
       const Lkbd = cache.getKeyboardForStub(Lstub);
-      const Lrn = this._GetKeyboardDetail(Lstub, Lkbd);  // I2078 - Full keyboard detail
-      Lr.push(Lrn);
+      if (Lkbd instanceof JSKeyboard) {
+        const Lrn = this._GetKeyboardDetail(Lstub, Lkbd);  // I2078 - Full keyboard detail
+        Lr.push(Lrn);
+      } else {
+        // TODO-web-core: implement for KMX keyboards if needed
+      }
     }
     return Lr;
   }
@@ -669,13 +679,17 @@ export default class KeymanEngine extends KeymanEngineBase<BrowserConfiguration,
     argFormFactor?: DeviceSpec.FormFactor,
     argLayerId?: string
   ): HTMLElement {
-    let PKbd: JSKeyboard = null;
+    let PKbd: Keyboard = null;
 
     if(PInternalName != null) {
       PKbd = this.keyboardRequisitioner.cache.getKeyboard(PInternalName);
     }
 
     PKbd = PKbd || this.core.activeKeyboard;
+    if (!(PKbd instanceof JSKeyboard)) {
+      // TODO-web-core: implement for KMX keyboards if needed
+      return null;
+    }
     let Pstub = this.keyboardRequisitioner.cache.getStub(PKbd);
 
     // help.keyman.com will set this function in place to specify the desired

web/src/app/webview/src/contextManager.ts

@@ -1,4 +1,4 @@
-import { type JSKeyboard  } from 'keyman/engine/keyboard';
+import { JSKeyboard, Keyboard  } from 'keyman/engine/keyboard';
 import { Mock, OutputTarget, Transcription, findCommonSubstringEndIndex, isEmptyTransform, TextTransform } from 'keyman/engine/js-processor';
 import { KeyboardStub } from 'keyman/engine/keyboard-storage';
 import { ContextManagerBase } from 'keyman/engine/main';
@@ -192,7 +192,7 @@ export default class ContextManager extends ContextManagerBase<WebviewConfigurat
   protected prepareKeyboardForActivation(
     keyboardId: string,
     languageCode?: string
-  ): {keyboard: Promise<JSKeyboard>, metadata: KeyboardStub} {
+  ): {keyboard: Promise<Keyboard>, metadata: KeyboardStub} {
     const originalKeyboard = this.activeKeyboard;
     const activatingKeyboard = super.prepareKeyboardForActivation(keyboardId, languageCode);
 
@@ -203,7 +203,10 @@ export default class ContextManager extends ContextManagerBase<WebviewConfigurat
     // That said, it's best to keep it around for now and verify later.
     if(originalKeyboard?.metadata?.id == activatingKeyboard?.metadata?.id) {
       activatingKeyboard.keyboard = activatingKeyboard.keyboard.then((kbd) => {
-        kbd.refreshLayouts()
+        // TODO-web-core: Do we need to refresh layouts for KMX keyboards also?
+        if (kbd instanceof JSKeyboard) {
+          kbd.refreshLayouts();
+        }
         return kbd;
       });
     }

web/src/app/webview/src/passthroughKeyboard.ts

@@ -1,10 +1,10 @@
-import { DeviceSpec, JSKeyboard, KeyEvent, ManagedPromise } from 'keyman/engine/keyboard';
+import { DeviceSpec, Keyboard, KeyEvent, ManagedPromise } from 'keyman/engine/keyboard';
 
 import { HardKeyboard, processForMnemonicsAndLegacy } from 'keyman/engine/main';
 
 export default class PassthroughKeyboard extends HardKeyboard {
   readonly baseDevice: DeviceSpec;
-  public activeKeyboard: JSKeyboard;
+  public activeKeyboard: Keyboard;
 
   constructor(baseDevice: DeviceSpec) {
     super();

web/src/engine/keyboard-storage/src/stubAndKeyboardCache.ts

@@ -1,4 +1,4 @@
-import { JSKeyboard, KeyboardLoaderBase as KeyboardLoader } from "keyman/engine/keyboard";
+import { type Keyboard, JSKeyboard, KeyboardLoaderBase as KeyboardLoader } from "keyman/engine/keyboard";
 import { EventEmitter } from "eventemitter3";
 
 import KeyboardStub from "./keyboardStub.js";
@@ -38,12 +38,12 @@ interface EventMap {
   /**
    * Indicates that the specified Keyboard has just been added to the cache.
    */
-  keyboardadded: (keyboard: JSKeyboard) => void;
+  keyboardadded: (keyboard: Keyboard) => void;
 }
 
 export default class StubAndKeyboardCache extends EventEmitter<EventMap> {
   private stubSetTable: Record<string, Record<string, KeyboardStub>> = {};
-  private keyboardTable: Record<string, JSKeyboard | Promise<JSKeyboard>> = {};
+  private keyboardTable: Record<string, Keyboard | Promise<Keyboard>> = {};
 
   private readonly keyboardLoader: KeyboardLoader;
 
@@ -52,11 +52,11 @@ export default class StubAndKeyboardCache extends EventEmitter<EventMap> {
     this.keyboardLoader = keyboardLoader;
   }
 
-  getKeyboardForStub(stub: KeyboardStub): JSKeyboard {
+  getKeyboardForStub(stub: KeyboardStub): Keyboard {
     return stub ? this.getKeyboard(stub.KI) : null;
   }
 
-  getKeyboard(keyboardID: string): JSKeyboard {
+  getKeyboard(keyboardID: string): Keyboard {
     if(!keyboardID) {
       return null;
     }
@@ -112,14 +112,14 @@ export default class StubAndKeyboardCache extends EventEmitter<EventMap> {
     }
   }
 
-  addKeyboard(keyboard: JSKeyboard) {
+  addKeyboard(keyboard: Keyboard) {
     const keyboardID = prefixed(keyboard.id);
     this.keyboardTable[keyboardID] = keyboard;
 
     this.emit('keyboardadded', keyboard);
   }
 
-  fetchKeyboardForStub(stub: KeyboardStub) : Promise<JSKeyboard> {
+  fetchKeyboardForStub(stub: KeyboardStub) : Promise<Keyboard> {
     return this.fetchKeyboard(stub.KI);
   }
 
@@ -134,7 +134,7 @@ export default class StubAndKeyboardCache extends EventEmitter<EventMap> {
     return cachedEntry instanceof Promise;
   }
 
-  fetchKeyboard(keyboardID: string): Promise<JSKeyboard> {
+  fetchKeyboard(keyboardID: string): Promise<Keyboard> {
     if(!keyboardID) {
       throw new Error("Keyboard ID must be specified");
     }
@@ -166,7 +166,9 @@ export default class StubAndKeyboardCache extends EventEmitter<EventMap> {
 
     promise.then((kbd) => {
       // Overrides the built-in ID in case of keyboard namespacing.
-      kbd.scriptObject["KI"] = keyboardID;
+      if (kbd instanceof JSKeyboard) {
+        kbd.scriptObject["KI"] = keyboardID;
+      }
       this.addKeyboard(kbd);
     }).catch((err) => {
       delete this.keyboardTable[keyboardID];

web/src/engine/keyboard/build.sh

@@ -22,6 +22,7 @@ builder_describe \
   "@/web/src/tools/testing/recorder-core  test" \
   "@/web/src/tools/es-bundling" \
   "@/web/src/engine/common/web-utils" \
+  "@/web/src/engine/core-processor" \
   configure \
   clean \
   build \

web/src/engine/keyboard/src/index.ts

@@ -1,8 +1,10 @@
 export { ActiveKeyBase, ActiveKey, ActiveSubKey, ActiveRow, ActiveLayer, ActiveLayout } from "./keyboards/activeLayout.js";
 export { ButtonClass, ButtonClasses, LayoutLayer, LayoutFormFactor, LayoutRow, LayoutKey, LayoutSubKey, Layouts } from "./keyboards/defaultLayouts.js";
 export { JSKeyboard, LayoutState, VariableStoreDictionary } from "./keyboards/jsKeyboard.js";
+export { KeyboardMinimalInterface } from './keyboards/keyboardMinimalInterface.js';
+export { KMXKeyboard } from './keyboards/kmxKeyboard.js';
 export { KeyboardHarness, KeyboardKeymanGlobal, MinimalCodesInterface, MinimalKeymanGlobal } from "./keyboards/keyboardHarness.js";
-export { KeyboardLoaderBase } from "./keyboards/keyboardLoaderBase.js";
+export { Keyboard, KeyboardLoaderBase } from "./keyboards/keyboardLoaderBase.js";
 export { KeyboardLoadErrorBuilder, KeyboardMissingError, KeyboardScriptError, KeyboardDownloadError, InvalidKeyboardError } from './keyboards/keyboardLoadError.js'
 export {
   CloudKeyboardFont,

web/src/engine/keyboard/src/keyboards/keyboardLoaderBase.ts

@@ -1,12 +1,16 @@
+import { MainModule as KmCoreModule, KM_CORE_STATUS } from 'keyman/engine/core-processor';
 import { JSKeyboard } from "./jsKeyboard.js";
+import { KMXKeyboard } from './kmxKeyboard.js';
 import { KeyboardHarness } from "./keyboardHarness.js";
 import KeyboardProperties from "./keyboardProperties.js";
 import { KeyboardLoadErrorBuilder, StubBasedErrorBuilder, UriBasedErrorBuilder } from './keyboardLoadError.js';
 
 export type KeyboardStub = KeyboardProperties & { filename: string };
+export type Keyboard = JSKeyboard | KMXKeyboard;
 
 export abstract class KeyboardLoaderBase {
   private _harness: KeyboardHarness;
+  protected _km_core: Promise<KmCoreModule>;
 
   public get harness(): KeyboardHarness {
     return this._harness;
@@ -16,13 +20,17 @@ export abstract class KeyboardLoaderBase {
     this._harness = harness;
   }
 
+  public set coreModule(km_core: Promise<KmCoreModule>) {
+    this._km_core = km_core;
+  }
+
   /**
    * Load a keyboard from a remote or local URI.
    *
    * @param uri  The URI of the keyboard to load.
    * @returns    A Promise that resolves to the loaded keyboard.
    */
-  public loadKeyboardFromPath(uri: string): Promise<JSKeyboard> {
+  public loadKeyboardFromPath(uri: string): Promise<Keyboard> {
     this.harness.install();
     return this.loadKeyboardInternal(uri, new UriBasedErrorBuilder(uri));
   }
@@ -33,17 +41,22 @@ export abstract class KeyboardLoaderBase {
    * @param stub  The stub of the keyboard to load.
    * @returns     A Promise that resolves to the loaded keyboard.
    */
-  public async loadKeyboardFromStub(stub: KeyboardStub): Promise<JSKeyboard> {
+  public async loadKeyboardFromStub(stub: KeyboardStub): Promise<Keyboard> {
     this.harness.install();
     return this.loadKeyboardInternal(stub.filename, new StubBasedErrorBuilder(stub));
   }
 
-  private async loadKeyboardInternal(uri: string, errorBuilder: KeyboardLoadErrorBuilder): Promise<JSKeyboard> {
+  private async loadKeyboardInternal(uri: string, errorBuilder: KeyboardLoadErrorBuilder): Promise<Keyboard> {
     const byteArray = await this.loadKeyboardBlob(uri, errorBuilder);
 
     if (byteArray.slice(0, 4) == Uint8Array.from([0x4b, 0x58, 0x54, 0x53])) { // 'KXTS'
       // KMX or LDML (KMX+) keyboard
-      console.error("KMX keyboard loading is not yet implemented!");
+      const result = (await this._km_core).keyboard_load_from_blob(uri, byteArray);
+      if (result.status == KM_CORE_STATUS.OK) {
+        // extract keyboard name from URI
+        const id = uri.split('#')[0].split('?')[0].split('/').pop().split('.')[0];
+        return new KMXKeyboard(id, result.object);
+      }
       return null;
     }
 

web/src/engine/keyboard/src/keyboards/keyboardMinimalInterface.ts

@@ -0,0 +1,5 @@
+import { Keyboard } from './keyboardLoaderBase.js';
+
+export interface KeyboardMinimalInterface {
+    activeKeyboard: Keyboard;
+}

web/src/engine/keyboard/src/keyboards/kmxKeyboard.ts

@@ -0,0 +1,24 @@
+import { km_core_keyboard } from 'keyman/engine/core-processor';
+
+/**
+ * Acts as a wrapper class for KMX(+) Keyman keyboards
+ */
+export class KMXKeyboard {
+
+  constructor(id: string, keyboard: km_core_keyboard) {
+    this.id = id;
+    this.keyboard = keyboard;
+  }
+
+  id: string;
+  keyboard: km_core_keyboard;
+
+  get isMnemonic(): boolean {
+    return false;
+  }
+
+  get version(): string {
+    // TODO-web-core: get version from `km_core_keyboard_get_attrs`
+    return '';
+  }
+}