Initial Move from Azure DevOps to GitHub

src/Explorer/Notebook/NotebookComponent/VirtualCommandBarComponent.tsx

@@ -0,0 +1,79 @@
+import * as React from "react";
+import { AppState, ContentRef, selectors } from "@nteract/core";
+import { connect } from "react-redux";
+import NteractUtil from "../NTeractUtil";
+
+interface VirtualCommandBarComponentProps {
+  kernelSpecName: string;
+  kernelStatus: string;
+  currentCellType: string;
+  onRender: () => void;
+}
+
+class VirtualCommandBarComponent extends React.Component<VirtualCommandBarComponentProps> {
+  constructor(props: VirtualCommandBarComponentProps) {
+    super(props);
+    this.state = {};
+  }
+
+  shouldComponentUpdate(nextProps: VirtualCommandBarComponentProps): boolean {
+    return (
+      this.props.kernelStatus !== nextProps.kernelStatus ||
+      this.props.kernelSpecName !== nextProps.kernelSpecName ||
+      this.props.currentCellType !== nextProps.currentCellType
+    );
+  }
+
+  public render(): JSX.Element {
+    this.props.onRender && this.props.onRender();
+    return <></>;
+  }
+}
+
+interface InitialProps {
+  contentRef: ContentRef;
+  onRender: () => void;
+}
+
+// Redux
+const makeMapStateToProps = (
+  initialState: AppState,
+  initialProps: InitialProps
+): ((state: AppState) => VirtualCommandBarComponentProps) => {
+  const { contentRef } = initialProps;
+  const mapStateToProps = (state: AppState) => {
+    const content = selectors.content(state, { contentRef });
+    let kernelStatus, kernelSpecName, currentCellType;
+
+    if (!content || content.type !== "notebook") {
+      return {
+        kernelStatus,
+        kernelSpecName,
+        currentCellType
+      } as VirtualCommandBarComponentProps;
+    }
+
+    const kernelRef = content.model.kernelRef;
+    let kernel;
+    if (kernelRef) {
+      kernel = selectors.kernel(state, { kernelRef });
+    }
+
+    if (kernel) {
+      kernelStatus = kernel.status;
+      kernelSpecName = kernel.kernelSpecName;
+    }
+
+    currentCellType = NteractUtil.getCurrentCellType(content);
+    return {
+      kernelStatus,
+      kernelSpecName,
+      currentCellType,
+      onRender: initialProps.onRender
+    };
+  };
+
+  return mapStateToProps;
+};
+
+export default connect(makeMapStateToProps)(VirtualCommandBarComponent);