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[VSoRC/.git] / node_modules / xterm / src / browser / ScreenDprMonitor.ts

diff --git a/node_modules/xterm/src/browser/ScreenDprMonitor.ts b/node_modules/xterm/src/browser/ScreenDprMonitor.ts
deleted file mode 100644 (file)
index ec8c6d8..0000000
--- a/node_modules/xterm/src/browser/ScreenDprMonitor.ts
+++ /dev/null
@@ -1,69 +0,0 @@
-/**
- * Copyright (c) 2017 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { Disposable } from 'common/Lifecycle';
-
-export type ScreenDprListener = (newDevicePixelRatio?: number, oldDevicePixelRatio?: number) => void;
-
-/**
- * The screen device pixel ratio monitor allows listening for when the
- * window.devicePixelRatio value changes. This is done not with polling but with
- * the use of window.matchMedia to watch media queries. When the event fires,
- * the listener will be reattached using a different media query to ensure that
- * any further changes will register.
- *
- * The listener should fire on both window zoom changes and switching to a
- * monitor with a different DPI.
- */
-export class ScreenDprMonitor extends Disposable {
-  private _currentDevicePixelRatio: number = window.devicePixelRatio;
-  private _outerListener: ((this: MediaQueryList, ev: MediaQueryListEvent) => any) | undefined;
-  private _listener: ScreenDprListener | undefined;
-  private _resolutionMediaMatchList: MediaQueryList | undefined;
-
-  public setListener(listener: ScreenDprListener): void {
-    if (this._listener) {
-      this.clearListener();
-    }
-    this._listener = listener;
-    this._outerListener = () => {
-      if (!this._listener) {
-        return;
-      }
-      this._listener(window.devicePixelRatio, this._currentDevicePixelRatio);
-      this._updateDpr();
-    };
-    this._updateDpr();
-  }
-
-  public dispose(): void {
-    super.dispose();
-    this.clearListener();
-  }
-
-  private _updateDpr(): void {
-    if (!this._resolutionMediaMatchList || !this._outerListener) {
-      return;
-    }
-
-    // Clear listeners for old DPR
-    this._resolutionMediaMatchList.removeListener(this._outerListener);
-
-    // Add listeners for new DPR
-    this._currentDevicePixelRatio = window.devicePixelRatio;
-    this._resolutionMediaMatchList = window.matchMedia(`screen and (resolution: ${window.devicePixelRatio}dppx)`);
-    this._resolutionMediaMatchList.addListener(this._outerListener);
-  }
-
-  public clearListener(): void {
-    if (!this._resolutionMediaMatchList || !this._listener || !this._outerListener) {
-      return;
-    }
-    this._resolutionMediaMatchList.removeListener(this._outerListener);
-    this._resolutionMediaMatchList = undefined;
-    this._listener = undefined;
-    this._outerListener = undefined;
-  }
-}