Merge pull request #5535 from Tyriar/5408_2

Fix firefox selection when in shadow dom take 2

addons/addon-fit/src/FitAddon.ts

@@ -23,6 +23,17 @@ interface ITerminalDimensions {
 const MINIMUM_COLS = 2;
 const MINIMUM_ROWS = 1;
 
+function getWindow(e: Node): Window {
+  if (e?.ownerDocument?.defaultView) {
+    return e.ownerDocument.defaultView;
+  }
+
+  return window;
+}
+function _getComputedStyle(el: HTMLElement): CSSStyleDeclaration {
+  return getWindow(el).getComputedStyle(el, null);
+}
+
 export class FitAddon implements ITerminalAddon , IFitApi {
   private _terminal: Terminal | undefined;
 
@@ -69,10 +80,10 @@ export class FitAddon implements ITerminalAddon , IFitApi {
       ? 0
       : (this._terminal.options.overviewRuler?.width || ViewportConstants.DEFAULT_SCROLL_BAR_WIDTH));
 
-    const parentElementStyle = window.getComputedStyle(this._terminal.element.parentElement);
+    const parentElementStyle = _getComputedStyle(this._terminal.element.parentElement);
     const parentElementHeight = parseInt(parentElementStyle.getPropertyValue('height'));
     const parentElementWidth = Math.max(0, parseInt(parentElementStyle.getPropertyValue('width')));
-    const elementStyle = window.getComputedStyle(this._terminal.element);
+    const elementStyle = _getComputedStyle(this._terminal.element);
     const elementPadding = {
       top: parseInt(elementStyle.getPropertyValue('padding-top')),
       bottom: parseInt(elementStyle.getPropertyValue('padding-bottom')),

src/browser/services/MouseService.ts

@@ -3,6 +3,7 @@
  * @license MIT
  */
 
+import { getWindow } from 'vs/base/browser/dom';
 import { ICharSizeService, IRenderService, IMouseService } from './Services';
 import { getCoords, getCoordsRelativeToElement } from 'browser/input/Mouse';
 
@@ -30,7 +31,7 @@ export class MouseService implements IMouseService {
   }
 
   public getMouseReportCoords(event: MouseEvent, element: HTMLElement): { col: number, row: number, x: number, y: number } | undefined {
-    const coords = getCoordsRelativeToElement(window, event, element);
+    const coords = getCoordsRelativeToElement(getWindow(element), event, element);
     if (!this._charSizeService.hasValidSize) {
       return undefined;
     }