Creating a hotkeys context for viewer

Packages/ohif-hotkeys/client/classes/HotkeysManager.js

@@ -0,0 +1,59 @@
+import { ReactiveVar } from 'meteor/reactive-var';
+import { HotkeysContext } from 'meteor/ohif:hotkeys/client/classes/HotkeysContext';
+
+export class HotkeysManager {
+    constructor() {
+        this.contexts = {};
+        this.currentContextName = null;
+        this.enabled = new ReactiveVar(true);
+    }
+
+    disable() {
+        this.enabled.set(false);
+    }
+
+    enable() {
+        this.enabled.set(true);
+    }
+
+    getContext(contextName) {
+        return this.contexts[contextName];
+    }
+
+    getCurrentContext() {
+        return this.getContext(this.currentContextName);
+    }
+
+    setContext(contextName, contextDefinitions) {
+        const enabled = this.enabled;
+        const context = new HotkeysContext(contextName, contextDefinitions, enabled);
+        const currentContext = this.getCurrentContext();
+        if (currentContext && currentContext.name === contextName) {
+            currentContext.destroy();
+            context.initialize();
+        }
+
+        this.contexts[contextName] = context;
+    }
+
+    unsetContext(contextName) {
+        if (contextName === this.currentContextName) {
+            this.getCurrentContext().destroy();
+        }
+
+        delete this.contexts[contextName];
+    }
+
+    switchToContext(contextName) {
+        const currentContext = this.getCurrentContext();
+        if (currentContext) {
+            currentContext.destroy();
+        }
+
+        const newContext = this.contexts[contextName];
+        if (!newContext) return;
+
+        this.currentContextName = contextName;
+        newContext.initialize();
+    }
+}