Merge pull request #4680 from Tyriar/crash

Revert Stylesheet change

src/browser/renderer/dom/DomRenderer.ts

@@ -14,7 +14,6 @@ import { color } from 'common/Color';
 import { EventEmitter } from 'common/EventEmitter';
 import { Disposable, toDisposable } from 'common/Lifecycle';
 import { IBufferService, IInstantiationService, IOptionsService } from 'common/services/Services';
-import { createStyle, IStyleSheet } from './StyleSheet';
 
 
 const TERMINAL_CLASS_PREFIX = 'xterm-dom-renderer-owner-';
@@ -36,8 +35,8 @@ export class DomRenderer extends Disposable implements IRenderer {
   private _rowFactory: DomRendererRowFactory;
   private _terminalClass: number = nextTerminalId++;
 
-  private _themeStyle!: IStyleSheet;
+  private _themeStyleElement!: HTMLStyleElement;
-  private _dimensionsStyle!: IStyleSheet;
+  private _dimensionsStyleElement!: HTMLStyleElement;
   private _rowContainer: HTMLElement;
   private _rowElements: HTMLElement[] = [];
   private _selectionContainer: HTMLElement;
@@ -92,9 +91,9 @@ export class DomRenderer extends Disposable implements IRenderer {
       // https://github.com/xtermjs/xterm.js/issues/2960
       this._rowContainer.remove();
       this._selectionContainer.remove();
-      this._themeStyle.dispose();
-      this._dimensionsStyle.dispose();
       this._widthCache.dispose();
+      this._themeStyleElement.remove();
+      this._dimensionsStyleElement.remove();
     }));
 
     this._widthCache = new WidthCache(document);
@@ -130,8 +129,9 @@ export class DomRenderer extends Disposable implements IRenderer {
       element.style.overflow = 'hidden';
     }
 
-    if (!this._dimensionsStyle) {
+    if (!this._dimensionsStyleElement) {
-      this._dimensionsStyle = createStyle(this._screenElement);
+      this._dimensionsStyleElement = document.createElement('style');
+      this._screenElement.appendChild(this._dimensionsStyleElement);
     }
 
     const styles =
@@ -141,7 +141,7 @@ export class DomRenderer extends Disposable implements IRenderer {
       ` vertical-align: top;` +
       `}`;
 
-    this._dimensionsStyle.setCss(styles);
+    this._dimensionsStyleElement.textContent = styles;
 
     this._selectionContainer.style.height = this._viewportElement.style.height;
     this._screenElement.style.width = `${this.dimensions.css.canvas.width}px`;
@@ -149,8 +149,9 @@ export class DomRenderer extends Disposable implements IRenderer {
   }
 
   private _injectCss(colors: ReadonlyColorSet): void {
-    if (!this._themeStyle) {
+    if (!this._themeStyleElement) {
-      this._themeStyle = createStyle(this._screenElement);
+      this._themeStyleElement = document.createElement('style');
+      this._screenElement.appendChild(this._themeStyleElement);
     }
 
     // Base CSS
@@ -248,7 +249,7 @@ export class DomRenderer extends Disposable implements IRenderer {
       `${this._terminalSelector} .${FG_CLASS_PREFIX}${INVERTED_DEFAULT_COLOR}.${RowCss.DIM_CLASS} { color: ${color.multiplyOpacity(color.opaque(colors.background), 0.5).css}; }` +
       `${this._terminalSelector} .${BG_CLASS_PREFIX}${INVERTED_DEFAULT_COLOR} { background-color: ${colors.foreground.css}; }`;
 
-    this._themeStyle.setCss(styles);
+    this._themeStyleElement.textContent = styles;
   }
 
   /**

src/browser/renderer/dom/StyleSheet.ts

@@ -1,50 +0,0 @@
-/**
- * Copyright (c) 2023 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { isElectron } from 'common/Platform';
-
-export interface IStyleSheet {
-  dispose: () => void;
-  setCss: (value: string) => void;
-}
-
-const createCssStyleSheet = (doc: Document): IStyleSheet => {
-  const sheet = new CSSStyleSheet();
-  doc.adoptedStyleSheets.push(sheet);
-  return {
-    dispose() {
-      const index = doc.adoptedStyleSheets.indexOf(sheet);
-      doc.adoptedStyleSheets.splice(index, 1);
-    },
-    setCss(css) {
-      sheet.replaceSync(css);
-    }
-  };
-};
-
-const createStyleElement = (parent: HTMLElement): IStyleSheet => {
-  const doc = parent.ownerDocument;
-  const element = doc.createElement('style');
-  parent.append(element);
-  return {
-    dispose() {
-      element.remove();
-    },
-    setCss(css) {
-      element.textContent = css;
-    }
-  };
-};
-
-export const createStyle = (parent: HTMLElement): IStyleSheet => {
-  // The combination of the CSP workaround and the DOM renderer can trigger a crash in electron
-  // https://github.com/microsoft/vscode/issues/189753
-  if (!isElectron) {
-    try {
-      return createCssStyleSheet(parent.ownerDocument);
-    } catch { /* Fall through */ }
-  }
-  return createStyleElement(parent);
-};

src/common/Platform.ts

@@ -17,7 +17,6 @@ export const isNode = (typeof navigator === 'undefined') ? true : false;
 const userAgent = (isNode) ? 'node' : navigator.userAgent;
 const platform = (isNode) ? 'node' : navigator.platform;
 
-export const isElectron = userAgent.includes('Electron');
 export const isFirefox = userAgent.includes('Firefox');
 export const isLegacyEdge = userAgent.includes('Edge');
 export const isSafari = /^((?!chrome|android).)*safari/i.test(userAgent);