Improve find by tracking actual rendered text (#9419)

* Improve find by tracking actual rendered text

* Fix tests, add notebook md render

src/sql/workbench/services/notebook/browser/models/cell.ts

@@ -37,6 +37,7 @@ export class CellModel implements ICellModel {
 	private _cellGuid: string;
 	private _future: FutureInternal;
 	private _outputs: nb.ICellOutput[] = [];
+	private _renderedOutputTextContent: string[] = [];
 	private _isEditMode: boolean;
 	private _onOutputsChanged = new Emitter<IOutputChangedEvent>();
 	private _onCellModeChanged = new Emitter<boolean>();
@@ -464,6 +465,14 @@ export class CellModel implements ICellModel {
 		return this._outputs;
 	}
 
+	public get renderedOutputTextContent(): string[] {
+		return this._renderedOutputTextContent;
+	}
+
+	public set renderedOutputTextContent(content: string[]) {
+		this._renderedOutputTextContent = content;
+	}
+
 	private handleReply(msg: nb.IShellMessage): void {
 		// TODO #931 we should process this. There can be a payload attached which should be added to outputs.
 		// In all other cases, it is a no-op

src/sql/workbench/services/notebook/browser/models/modelInterfaces.ts

@@ -468,6 +468,7 @@ export interface ICellModel {
 	executionCount: number | undefined;
 	readonly future: FutureInternal;
 	readonly outputs: ReadonlyArray<nb.ICellOutput>;
+	renderedOutputTextContent?: string[];
 	readonly onOutputsChanged: Event<IOutputChangedEvent>;
 	readonly onExecutionStateChange: Event<CellExecutionState>;
 	readonly executionState: CellExecutionState;