Revert "Defer updating screen reader content when not in a11y mode" (microsoft#167829)

Fixes microsoft#165821: Revert "Defer updating screen reader content when not in a11y mode"

This reverts commit ffe90c3.

Author: alexdima

src/vs/editor/browser/controller/textAreaHandler.ts

@@ -34,7 +34,6 @@ import { MOUSE_CURSOR_TEXT_CSS_CLASS_NAME } from 'vs/base/browser/ui/mouseCursor
 import { TokenizationRegistry } from 'vs/editor/common/languages';
 import { ColorId, ITokenPresentation } from 'vs/editor/common/encodedTokenAttributes';
 import { Color } from 'vs/base/common/color';
-import { TimeoutTimer } from 'vs/base/common/async';
 import { IME } from 'vs/base/common/ime';
 
 export interface IVisibleRangeProvider {
@@ -114,7 +113,6 @@ export class TextAreaHandler extends ViewPart {
 
 	private _accessibilitySupport!: AccessibilitySupport;
 	private _accessibilityPageSize!: number;
-	private _accessibilityWriteTimer: TimeoutTimer;
 	private _textAreaWrapping!: boolean;
 	private _textAreaWidth!: number;
 	private _contentLeft: number;
@@ -154,7 +152,6 @@ export class TextAreaHandler extends ViewPart {
 		const layoutInfo = options.get(EditorOption.layoutInfo);
 
 		this._setAccessibilityOptions(options);
-		this._accessibilityWriteTimer = this._register(new TimeoutTimer());
 		this._contentLeft = layoutInfo.contentLeft;
 		this._contentWidth = layoutInfo.contentWidth;
 		this._contentHeight = layoutInfo.height;
@@ -610,11 +607,9 @@ export class TextAreaHandler extends ViewPart {
 	public override onCursorStateChanged(e: viewEvents.ViewCursorStateChangedEvent): boolean {
 		this._selections = e.selections.slice(0);
 		this._modelSelections = e.modelSelections.slice(0);
-		if (this._accessibilitySupport === AccessibilitySupport.Disabled) {
-			this._accessibilityWriteTimer.cancelAndSet(() => this._textAreaInput.writeScreenReaderContent('selection changed'), 0);
-		} else {
-			this._textAreaInput.writeScreenReaderContent('selection changed');
-		}
+		// We must update the <textarea> synchronously, otherwise long press IME on macos breaks.
+		// See https://github.com/microsoft/vscode/issues/165821
+		this._textAreaInput.writeScreenReaderContent('selection changed');
 		return true;
 	}
 	public override onDecorationsChanged(e: viewEvents.ViewDecorationsChangedEvent): boolean {