remove AccessibleBuffer (#4427)

* remove AccessibleBuffer

* rm more

* Update src/browser/Terminal.ts

* rm css

Author: meganrogge

css/xterm.css

@@ -151,29 +151,6 @@
     color: transparent;
 }
 
-.xterm .xterm-accessible-buffer div {
-	white-space: pre-wrap;
-}
-
-.xterm .xterm-accessible-buffer {
-    position: absolute;
-    left: 0;
-    top: 0;
-    bottom: 0;
-    right: 0;
-    padding: .5em;
-    background: #000;
-    color: #fff;
-    opacity: 0;
-    overflow: scroll;
-    overflow-x: hidden;
-}
-
-.xterm .xterm-accessible-buffer:focus-within {
-    opacity: 1;
-    z-index: 20;
-}
-
 .xterm .live-region {
     position: absolute;
     left: -9999px;

src/browser/AccessibleBuffer.ts

@@ -10,6 +10,3 @@ export let promptLabel = 'Terminal input';
 
 // eslint-disable-next-line prefer-const
 export let tooMuchOutput = 'Too much output to announce, navigate to rows manually to read';
-
-// eslint-disable-next-line prefer-const
-export let accessibleBuffer = 'Accessibility buffer';

src/browser/LocalizableStrings.ts

@@ -33,7 +33,6 @@ import * as Browser from 'common/Platform';
 import { addDisposableDomListener } from 'browser/Lifecycle';
 import * as Strings from 'browser/LocalizableStrings';
 import { AccessibilityManager } from './AccessibilityManager';
-import { AccessibleBuffer } from './AccessibleBuffer';
 import { ITheme, IMarker, IDisposable, ILinkProvider, IDecorationOptions, IDecoration } from 'xterm';
 import { DomRenderer } from 'browser/renderer/dom/DomRenderer';
 import { KeyboardResultType, CoreMouseEventType, CoreMouseButton, CoreMouseAction, ITerminalOptions, ScrollSource, IColorEvent, ColorIndex, ColorRequestType } from 'common/Types';
@@ -72,7 +71,6 @@ export class Terminal extends CoreTerminal implements ITerminal {
   private _viewportElement: HTMLElement | undefined;
   private _helperContainer: HTMLElement | undefined;
   private _compositionView: HTMLElement | undefined;
-  private _accessibleBuffer: AccessibleBuffer | undefined;
 
   private _overviewRulerRenderer: OverviewRulerRenderer | undefined;
 
@@ -193,13 +191,6 @@ export class Terminal extends CoreTerminal implements ITerminal {
     }));
   }
 
-  public registerBufferElementProvider(bufferProvider: IBufferElementProvider): IDisposable {
-    if (!this._accessibleBuffer) {
-      throw new Error ('Cannot register buffer element provider when terminal has not been opened yet');
-    }
-    return this._accessibleBuffer.registerBufferElementProvider(bufferProvider);
-  }
-
   /**
    * Handle color event from inputhandler for OSC 4|104 | 10|110 | 11|111 | 12|112.
    * An event from OSC 4|104 may contain multiple set or report requests, and multiple
@@ -585,8 +576,6 @@ export class Terminal extends CoreTerminal implements ITerminal {
     // Listen for mouse events and translate
     // them into terminal mouse protocols.
     this.bindMouse();
-
-    this._accessibleBuffer = this._instantiationService.createInstance(AccessibleBuffer, this);
   }
 
   private _createRenderer(): IRenderer {
@@ -778,9 +767,6 @@ export class Terminal extends CoreTerminal implements ITerminal {
      */
     this.register(addDisposableDomListener(el, 'mousedown', (ev: MouseEvent) => {
       ev.preventDefault();
-      if (this._accessibleBuffer?.isAccessibleBufferActive) {
-        return;
-      }
       this.focus();
 
       // Don't send the mouse button to the pty if mouse events are disabled or

src/browser/Terminal.ts

@@ -80,7 +80,6 @@ export interface IPublicTerminal extends IDisposable {
   refresh(start: number, end: number): void;
   clearTextureAtlas(): void;
   reset(): void;
-  registerBufferElementProvider(bufferProvider: IBufferElementProvider): IDisposable;
 }
 
 export type CustomKeyEventHandler = (event: KeyboardEvent) => boolean;

src/browser/Types.d.ts

@@ -236,9 +236,6 @@ export class Terminal implements ITerminalApi {
   public loadAddon(addon: ITerminalAddon): void {
     return this._addonManager.loadAddon(this, addon);
   }
-  public registerBufferElementProvider(bufferProvider: IBufferElementProvider): IDisposable {
-    return this._core.registerBufferElementProvider(bufferProvider);
-  }
   public static get strings(): ILocalizableStrings {
     return Strings;
   }

src/browser/public/Terminal.ts

@@ -498,11 +498,6 @@ declare module 'xterm' {
      * being printed to the terminal when `screenReaderMode` is enabled.
      */
     tooMuchOutput: string;
-
-    /**
-     * The aria label for the accessibility buffer
-     */
-    accessibleBuffer: string;
   }
 
   /**
@@ -1108,14 +1103,6 @@ declare module 'xterm' {
      * @param addon The addon to load.
      */
     loadAddon(addon: ITerminalAddon): void;
-
-   /*
-    * Registers a buffer element provider which will provide a custom element to
-    * use in the terminal's accessible buffer. Using this an xterm.js embedder
-    * has full control over how the buffer is represented in the DOM.
-    * @param bufferElementProvider The buffer element provider.
-    */
-    registerBufferElementProvider(bufferProvider: IBufferElementProvider): IDisposable;
   }
 
   /**