polish (microsoft#252392)

Author: aiday-mar

src/vs/editor/browser/controller/editContext/textArea/textAreaEditContext.ts

@@ -742,8 +742,7 @@ export class TextAreaEditContext extends AbstractEditContext {
 				}
 
 				// Try to render the textarea with the color/font style to match the text under it
-				const viewPosition = this._context.viewModel.coordinatesConverter.convertViewPositionToModelPosition(new Position(startPosition.lineNumber, 1));
-				const lineHeight = this._context.viewLayout.getLineHeightForLineNumber(viewPosition.lineNumber);
+				const lineHeight = this._context.viewLayout.getLineHeightForLineNumber(startPosition.lineNumber);
 				const viewLineData = this._context.viewModel.getViewLineData(startPosition.lineNumber);
 				const startTokenIndex = viewLineData.tokens.findTokenIndexAtOffset(startPosition.column - 1);
 				const endTokenIndex = viewLineData.tokens.findTokenIndexAtOffset(endPosition.column - 1);

src/vs/editor/browser/services/abstractCodeEditorService.ts

@@ -460,7 +460,7 @@ class DecorationTypeOptionsProvider implements IModelDecorationOptionsProvider {
 	public afterContentClassName: string | undefined;
 	public glyphMarginClassName: string | undefined;
 	public isWholeLine: boolean;
-	public lineHeight?: number;
+	public lineHeight: number | undefined;
 	public overviewRuler: IModelDecorationOverviewRulerOptions | undefined;
 	public stickiness: TrackedRangeStickiness | undefined;
 	public beforeInjectedText: InjectedTextOptions | undefined;