Fix other interface classes naming convention

js/input/IContext.js

@@ -0,0 +1,30 @@
+export default class IContext {
+
+    constructor(target, blueprint, options) {
+        /** @type {HTMLElement} */
+        this.target = target
+        /** @type {import("../Blueprint").default}" */
+        this.blueprint = blueprint
+        this.options = options
+        let self = this
+        this.blueprintFocusHandler = _ => self.listenEvents()
+        this.blueprintUnfocusHandler = _ => self.unlistenEvents()
+        if (options?.wantsFocusCallback ?? false) {
+            this.blueprint.addEventListener("blueprint-focus", this.blueprintFocusHandler)
+            this.blueprint.addEventListener("blueprint-unfocus", this.blueprintUnfocusHandler)
+        }
+    }
+
+    unlistenDOMElement() {
+        this.unlistenEvents()
+        this.blueprint.removeEventListener("blueprint-focus", this.blueprintFocusHandler)
+        this.blueprint.removeEventListener("blueprint-unfocus", this.blueprintUnfocusHandler)
+    }
+
+    /* Subclasses will probabily override the following methods */
+    listenEvents() {
+    }
+
+    unlistenEvents() {
+    }
+}