aux window - support Firefox

.eslintrc.json

@@ -308,6 +308,10 @@
 						"selector": "BinaryExpression[operator='instanceof'][right.name='MouseEvent']",
 						"message": "Use DOM.isMouseEvent() to support multi-window scenarios."
 					},
+					{
+						"selector": "BinaryExpression[operator='instanceof'][right.name=/^HTML\\w+/]",
+						"message": "Use DOM.isHTMLElement() and related methods to support multi-window scenarios."
+					},
 					{
 						"selector": "BinaryExpression[operator='instanceof'][right.name='KeyboardEvent']",
 						"message": "Use DOM.isKeyboardEvent() to support multi-window scenarios."

src/vs/base/browser/dom.ts

@@ -795,7 +795,7 @@ export function isAncestorUsingFlowTo(testChild: Node, testAncestor: Node): bool
 			return true;
 		}
 
-		if (node instanceof HTMLElement) {
+		if (isHTMLElement(node)) {
 			const flowToParentElement = getParentFlowToElement(node);
 			if (flowToParentElement) {
 				node = flowToParentElement;
@@ -1148,6 +1148,41 @@ function isCSSStyleRule(rule: CSSRule): rule is CSSStyleRule {
 	return typeof (rule as CSSStyleRule).selectorText === 'string';
 }
 
+export function isHTMLElement(e: unknown): e is HTMLElement {
+	// eslint-disable-next-line no-restricted-syntax
+	return e instanceof HTMLElement || e instanceof getWindow(e as Node).HTMLElement;
+}
+
+export function isHTMLAnchorElement(e: unknown): e is HTMLAnchorElement {
+	// eslint-disable-next-line no-restricted-syntax
+	return e instanceof HTMLAnchorElement || e instanceof getWindow(e as Node).HTMLAnchorElement;
+}
+
+export function isHTMLSpanElement(e: unknown): e is HTMLSpanElement {
+	// eslint-disable-next-line no-restricted-syntax
+	return e instanceof HTMLSpanElement || e instanceof getWindow(e as Node).HTMLSpanElement;
+}
+
+export function isHTMLTextAreaElement(e: unknown): e is HTMLTextAreaElement {
+	// eslint-disable-next-line no-restricted-syntax
+	return e instanceof HTMLTextAreaElement || e instanceof getWindow(e as Node).HTMLTextAreaElement;
+}
+
+export function isHTMLInputElement(e: unknown): e is HTMLInputElement {
+	// eslint-disable-next-line no-restricted-syntax
+	return e instanceof HTMLInputElement || e instanceof getWindow(e as Node).HTMLInputElement;
+}
+
+export function isHTMLButtonElement(e: unknown): e is HTMLButtonElement {
+	// eslint-disable-next-line no-restricted-syntax
+	return e instanceof HTMLButtonElement || e instanceof getWindow(e as Node).HTMLButtonElement;
+}
+
+export function isHTMLDivElement(e: unknown): e is HTMLDivElement {
+	// eslint-disable-next-line no-restricted-syntax
+	return e instanceof HTMLDivElement || e instanceof getWindow(e as Node).HTMLDivElement;
+}
+
 export function isMouseEvent(e: unknown): e is MouseEvent {
 	// eslint-disable-next-line no-restricted-syntax
 	return e instanceof MouseEvent || e instanceof getWindow(e as UIEvent).MouseEvent;
@@ -1286,7 +1321,7 @@ class FocusTracker extends Disposable implements IFocusTracker {
 	private _refreshStateHandler: () => void;
 
 	private static hasFocusWithin(element: HTMLElement | Window): boolean {
-		if (element instanceof HTMLElement) {
+		if (isHTMLElement(element)) {
 			const shadowRoot = getShadowRoot(element);
 			const activeElement = (shadowRoot ? shadowRoot.activeElement : element.ownerDocument.activeElement);
 			return isAncestor(activeElement, element);
@@ -1312,7 +1347,7 @@ class FocusTracker extends Disposable implements IFocusTracker {
 		const onBlur = () => {
 			if (hasFocus) {
 				loosingFocus = true;
-				(element instanceof HTMLElement ? getWindow(element) : element).setTimeout(() => {
+				(isHTMLElement(element) ? getWindow(element) : element).setTimeout(() => {
 					if (loosingFocus) {
 						loosingFocus = false;
 						hasFocus = false;
@@ -1335,7 +1370,7 @@ class FocusTracker extends Disposable implements IFocusTracker {
 
 		this._register(addDisposableListener(element, EventType.FOCUS, onFocus, true));
 		this._register(addDisposableListener(element, EventType.BLUR, onBlur, true));
-		if (element instanceof HTMLElement) {
+		if (isHTMLElement(element)) {
 			this._register(addDisposableListener(element, EventType.FOCUS_IN, () => this._refreshStateHandler()));
 			this._register(addDisposableListener(element, EventType.FOCUS_OUT, () => this._refreshStateHandler()));
 		}
@@ -1488,7 +1523,7 @@ export function hide(...elements: HTMLElement[]): void {
 
 function findParentWithAttribute(node: Node | null, attribute: string): HTMLElement | null {
 	while (node && node.nodeType === node.ELEMENT_NODE) {
-		if (node instanceof HTMLElement && node.hasAttribute(attribute)) {
+		if (isHTMLElement(node) && node.hasAttribute(attribute)) {
 			return node;
 		}
 
@@ -2304,7 +2339,7 @@ export function h(tag: string, ...args: [] | [attributes: { $: string } & Partia
 
 	if (children) {
 		for (const c of children) {
-			if (c instanceof HTMLElement) {
+			if (isHTMLElement(c)) {
 				el.appendChild(c);
 			} else if (typeof c === 'string') {
 				el.append(c);

src/vs/base/browser/ui/actionbar/actionbar.ts

@@ -328,7 +328,7 @@ export class ActionBar extends Disposable implements IActionRunner {
 		}
 
 		// by element
-		if (indexOrElement instanceof HTMLElement) {
+		if (DOM.isHTMLElement(indexOrElement)) {
 			while (indexOrElement.parentElement !== this.actionsList) {
 				if (!indexOrElement.parentElement) {
 					return undefined;

src/vs/base/browser/ui/contextview/contextview.ts

@@ -274,7 +274,7 @@ export class ContextView extends Disposable {
 		let around: IView;
 
 		// Get the element's position and size (to anchor the view)
-		if (anchor instanceof HTMLElement) {
+		if (DOM.isHTMLElement(anchor)) {
 			const elementPosition = DOM.getDomNodePagePosition(anchor);
 
 			// In areas where zoom is applied to the element or its ancestors, we need to adjust the size of the element

src/vs/base/browser/ui/iconLabel/iconLabel.ts

@@ -158,7 +158,7 @@ export class IconLabel extends Disposable {
 		const existingIconNode = this.domNode.element.querySelector('.monaco-icon-label-iconpath');
 		if (options?.iconPath) {
 			let iconNode;
-			if (!existingIconNode || !(existingIconNode instanceof HTMLElement)) {
+			if (!existingIconNode || !(dom.isHTMLElement(existingIconNode))) {
 				iconNode = dom.$('.monaco-icon-label-iconpath');
 				this.domNode.element.prepend(iconNode);
 			} else {

src/vs/base/browser/ui/list/listView.ts

@@ -4,7 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 
 import { DataTransfers, IDragAndDropData } from 'vs/base/browser/dnd';
-import { $, addDisposableListener, animate, Dimension, getContentHeight, getContentWidth, getTopLeftOffset, getWindow, isAncestor, scheduleAtNextAnimationFrame } from 'vs/base/browser/dom';
+import { $, addDisposableListener, animate, Dimension, getContentHeight, getContentWidth, getTopLeftOffset, getWindow, isAncestor, isHTMLElement, scheduleAtNextAnimationFrame } from 'vs/base/browser/dom';
 import { DomEmitter } from 'vs/base/browser/event';
 import { IMouseWheelEvent } from 'vs/base/browser/mouseEvent';
 import { EventType as TouchEventType, Gesture, GestureEvent } from 'vs/base/browser/touch';
@@ -1384,7 +1384,7 @@ export class ListView<T> implements IListView<T> {
 		const scrollableElement = this.scrollableElement.getDomNode();
 		let element: HTMLElement | null = target as (HTMLElement | null);
 
-		while (element instanceof HTMLElement && element !== this.rowsContainer && scrollableElement.contains(element)) {
+		while (isHTMLElement(element) && element !== this.rowsContainer && scrollableElement.contains(element)) {
 			const rawIndex = element.getAttribute('data-index');
 
 			if (rawIndex) {

src/vs/base/browser/ui/list/listWidget.ts

@@ -4,7 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 
 import { IDragAndDropData } from 'vs/base/browser/dnd';
-import { asCssValueWithDefault, createStyleSheet, Dimension, EventHelper, getActiveElement, getWindow, isActiveElement, isMouseEvent } from 'vs/base/browser/dom';
+import { asCssValueWithDefault, createStyleSheet, Dimension, EventHelper, getActiveElement, getWindow, isActiveElement, isHTMLElement, isMouseEvent } from 'vs/base/browser/dom';
 import { DomEmitter } from 'vs/base/browser/event';
 import { IKeyboardEvent, StandardKeyboardEvent } from 'vs/base/browser/keyboardEvent';
 import { Gesture } from 'vs/base/browser/touch';
@@ -635,7 +635,7 @@ class DOMFocusController<T> implements IDisposable {
 
 		const tabIndexElement = focusedDomElement.querySelector('[tabIndex]');
 
-		if (!tabIndexElement || !(tabIndexElement instanceof HTMLElement) || tabIndexElement.tabIndex === -1) {
+		if (!tabIndexElement || !(isHTMLElement(tabIndexElement)) || tabIndexElement.tabIndex === -1) {
 			return;
 		}
 

src/vs/base/browser/ui/sash/sash.ts

@@ -3,7 +3,7 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import { $, append, createStyleSheet, EventHelper, EventLike, getWindow } from 'vs/base/browser/dom';
+import { $, append, createStyleSheet, EventHelper, EventLike, getWindow, isHTMLElement } from 'vs/base/browser/dom';
 import { DomEmitter } from 'vs/base/browser/event';
 import { EventType, Gesture } from 'vs/base/browser/touch';
 import { Delayer } from 'vs/base/common/async';
@@ -670,7 +670,7 @@ export class Sash extends Disposable {
 	private getOrthogonalSash(e: PointerEvent): Sash | undefined {
 		const target = e.initialTarget ?? e.target;
 
-		if (!target || !(target instanceof HTMLElement)) {
+		if (!target || !(isHTMLElement(target))) {
 			return undefined;
 		}
 

src/vs/base/browser/ui/splitview/paneview.ts

@@ -5,7 +5,7 @@
 
 import { isFirefox } from 'vs/base/browser/browser';
 import { DataTransfers } from 'vs/base/browser/dnd';
-import { $, addDisposableListener, append, clearNode, EventHelper, EventType, getWindow, trackFocus } from 'vs/base/browser/dom';
+import { $, addDisposableListener, append, clearNode, EventHelper, EventType, getWindow, isHTMLElement, trackFocus } from 'vs/base/browser/dom';
 import { DomEmitter } from 'vs/base/browser/event';
 import { StandardKeyboardEvent } from 'vs/base/browser/keyboardEvent';
 import { Gesture, EventType as TouchEventType } from 'vs/base/browser/touch';
@@ -513,7 +513,7 @@ export class PaneView extends Disposable {
 
 		const eventDisposables = this._register(new DisposableStore());
 		const onKeyDown = this._register(new DomEmitter(this.element, 'keydown'));
-		const onHeaderKeyDown = Event.map(Event.filter(onKeyDown.event, e => e.target instanceof HTMLElement && e.target.classList.contains('pane-header'), eventDisposables), e => new StandardKeyboardEvent(e), eventDisposables);
+		const onHeaderKeyDown = Event.map(Event.filter(onKeyDown.event, e => isHTMLElement(e.target) && e.target.classList.contains('pane-header'), eventDisposables), e => new StandardKeyboardEvent(e), eventDisposables);
 
 		this._register(Event.filter(onHeaderKeyDown, e => e.keyCode === KeyCode.UpArrow, eventDisposables)(() => this.focusPrevious()));
 		this._register(Event.filter(onHeaderKeyDown, e => e.keyCode === KeyCode.DownArrow, eventDisposables)(() => this.focusNext()));

src/vs/base/test/browser/dom.test.ts

@@ -4,7 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 
 import * as assert from 'assert';
-import { $, asCssValueWithDefault, h, multibyteAwareBtoa, trackAttributes, copyAttributes, disposableWindowInterval, getWindows, getWindowsCount, getWindowId, getWindowById, hasWindow, getWindow, getDocument } from 'vs/base/browser/dom';
+import { $, asCssValueWithDefault, h, multibyteAwareBtoa, trackAttributes, copyAttributes, disposableWindowInterval, getWindows, getWindowsCount, getWindowId, getWindowById, hasWindow, getWindow, getDocument, isHTMLElement } from 'vs/base/browser/dom';
 import { ensureCodeWindow, isAuxiliaryWindow, mainWindow } from 'vs/base/browser/window';
 import { DeferredPromise, timeout } from 'vs/base/common/async';
 import { runWithFakedTimers } from 'vs/base/test/common/timeTravelScheduler';
@@ -85,23 +85,23 @@ suite('dom', () => {
 		test('should build simple nodes', () => {
 			const div = $('div');
 			assert(div);
-			assert(div instanceof HTMLElement);
+			assert(isHTMLElement(div));
 			assert.strictEqual(div.tagName, 'DIV');
 			assert(!div.firstChild);
 		});
 
 		test('should build nodes with id', () => {
 			const div = $('div#foo');
 			assert(div);
-			assert(div instanceof HTMLElement);
+			assert(isHTMLElement(div));
 			assert.strictEqual(div.tagName, 'DIV');
 			assert.strictEqual(div.id, 'foo');
 		});
 
 		test('should build nodes with class-name', () => {
 			const div = $('div.foo');
 			assert(div);
-			assert(div instanceof HTMLElement);
+			assert(isHTMLElement(div));
 			assert.strictEqual(div.tagName, 'DIV');
 			assert.strictEqual(div.className, 'foo');
 		});
@@ -136,15 +136,15 @@ suite('dom', () => {
 	suite('h', () => {
 		test('should build simple nodes', () => {
 			const div = h('div');
-			assert(div.root instanceof HTMLElement);
+			assert(isHTMLElement(div.root));
 			assert.strictEqual(div.root.tagName, 'DIV');
 
 			const span = h('span');
-			assert(span.root instanceof HTMLElement);
+			assert(isHTMLElement(span.root));
 			assert.strictEqual(span.root.tagName, 'SPAN');
 
 			const img = h('img');
-			assert(img.root instanceof HTMLElement);
+			assert(isHTMLElement(img.root));
 			assert.strictEqual(img.root.tagName, 'IMG');
 		});
 

src/vs/base/test/browser/iconLabels.test.ts

@@ -4,6 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 
 import * as assert from 'assert';
+import { isHTMLElement } from 'vs/base/browser/dom';
 import { renderLabelWithIcons } from 'vs/base/browser/ui/iconLabel/iconLabels';
 import { ensureNoDisposablesAreLeakedInTestSuite } from 'vs/base/test/common/utils';
 
@@ -47,7 +48,7 @@ suite('renderLabelWithIcons', () => {
 
 	const elementsToString = (elements: Array<HTMLElement | string>): string => {
 		return elements
-			.map(elem => elem instanceof HTMLElement ? elem.outerHTML : elem)
+			.map(elem => isHTMLElement(elem) ? elem.outerHTML : elem)
 			.reduce((a, b) => a + b, '');
 	};
 

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

@@ -12,7 +12,7 @@ import { IInstantiationService } from 'vs/platform/instantiation/common/instanti
 import { HoverWidget } from 'vs/editor/browser/services/hoverService/hoverWidget';
 import { IContextViewProvider, IDelegate } from 'vs/base/browser/ui/contextview/contextview';
 import { Disposable, DisposableStore, IDisposable, toDisposable } from 'vs/base/common/lifecycle';
-import { addDisposableListener, EventType, getActiveElement, isAncestorOfActiveElement, isAncestor, getWindow } from 'vs/base/browser/dom';
+import { addDisposableListener, EventType, getActiveElement, isAncestorOfActiveElement, isAncestor, getWindow, isHTMLElement } from 'vs/base/browser/dom';
 import { IKeybindingService } from 'vs/platform/keybinding/common/keybinding';
 import { StandardKeyboardEvent } from 'vs/base/browser/keyboardEvent';
 import { ResultKind } from 'vs/platform/keybinding/common/keybindingResolver';
@@ -90,7 +90,7 @@ export class HoverService extends Disposable implements IHoverService {
 		}, undefined, hoverDisposables);
 		// Set the container explicitly to enable aux window support
 		if (!options.container) {
-			const targetElement = options.target instanceof HTMLElement ? options.target : options.target.targetElements[0];
+			const targetElement = isHTMLElement(options.target) ? options.target : options.target.targetElements[0];
 			options.container = this._layoutService.getContainer(getWindow(targetElement));
 		}
 
@@ -259,7 +259,7 @@ export class HoverService extends Disposable implements IHoverService {
 				// track the mouse position
 				const onMouseMove = (e: MouseEvent) => {
 					target.x = e.x + 10;
-					if ((e.target instanceof HTMLElement) && getHoverTargetElement(e.target, htmlElement) !== htmlElement) {
+					if ((isHTMLElement(e.target)) && getHoverTargetElement(e.target, htmlElement) !== htmlElement) {
 						hideHover(true, true);
 					}
 				};
@@ -268,7 +268,7 @@ export class HoverService extends Disposable implements IHoverService {
 
 			hoverPreparation = toDispose;
 
-			if ((e.target instanceof HTMLElement) && getHoverTargetElement(e.target as HTMLElement, htmlElement) !== htmlElement) {
+			if ((isHTMLElement(e.target)) && getHoverTargetElement(e.target as HTMLElement, htmlElement) !== htmlElement) {
 				return; // Do not show hover when the mouse is over another hover target
 			}
 

src/vs/editor/browser/services/hoverService/hoverWidget.ts

@@ -150,7 +150,7 @@ export class HoverWidget extends Widget implements IHoverWidget {
 			contentsElement.textContent = options.content;
 			contentsElement.style.whiteSpace = 'pre-wrap';
 
-		} else if (options.content instanceof HTMLElement) {
+		} else if (dom.isHTMLElement(options.content)) {
 			contentsElement.appendChild(options.content);
 			contentsElement.classList.add('html-hover-contents');
 

src/vs/editor/browser/services/hoverService/updatableHoverWidget.ts

@@ -3,6 +3,7 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
+import { isHTMLElement } from 'vs/base/browser/dom';
 import type { IHoverWidget, IUpdatableHoverContent, IUpdatableHoverOptions } from 'vs/base/browser/ui/hover/hover';
 import type { IHoverDelegate, IHoverDelegateOptions, IHoverDelegateTarget } from 'vs/base/browser/ui/hover/hoverDelegate';
 import { HoverPosition } from 'vs/base/browser/ui/hover/hoverWidget';
@@ -33,7 +34,7 @@ export class UpdatableHoverWidget implements IDisposable {
 		}
 
 		let resolvedContent;
-		if (content === undefined || isString(content) || content instanceof HTMLElement) {
+		if (content === undefined || isString(content) || isHTMLElement(content)) {
 			resolvedContent = content;
 		} else if (!isFunction(content.markdown)) {
 			resolvedContent = content.markdown ?? content.markdownNotSupportedFallback;

src/vs/editor/contrib/inlayHints/browser/inlayHintsController.ts

@@ -3,7 +3,7 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import { ModifierKeyEmitter } from 'vs/base/browser/dom';
+import { isHTMLElement, ModifierKeyEmitter } from 'vs/base/browser/dom';
 import { isNonEmptyArray } from 'vs/base/common/arrays';
 import { RunOnceScheduler } from 'vs/base/common/async';
 import { CancellationToken, CancellationTokenSource } from 'vs/base/common/cancellation';
@@ -358,7 +358,7 @@ export class InlayHintsController implements IEditorContribution {
 
 	private _installContextMenu(): IDisposable {
 		return this._editor.onContextMenu(async e => {
-			if (!(e.event.target instanceof HTMLElement)) {
+			if (!(isHTMLElement(e.event.target))) {
 				return;
 			}
 			const part = this._getInlayHintLabelPart(e);

src/vs/platform/clipboard/browser/clipboardService.ts

@@ -4,7 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 
 import { isSafari, isWebkitWebView } from 'vs/base/browser/browser';
-import { $, addDisposableListener, getActiveDocument, getActiveWindow, onDidRegisterWindow } from 'vs/base/browser/dom';
+import { $, addDisposableListener, getActiveDocument, getActiveWindow, isHTMLElement, onDidRegisterWindow } from 'vs/base/browser/dom';
 import { mainWindow } from 'vs/base/browser/window';
 import { DeferredPromise } from 'vs/base/common/async';
 import { Event } from 'vs/base/common/event';
@@ -130,7 +130,7 @@ export class BrowserClipboardService extends Disposable implements IClipboardSer
 
 		activeDocument.execCommand('copy');
 
-		if (activeElement instanceof HTMLElement) {
+		if (isHTMLElement(activeElement)) {
 			activeElement.focus();
 		}