add SerializeAddon

addons/xterm-addon-serialize/src/SerializeAddon.ts

@@ -0,0 +1,42 @@
+/**
+ * Copyright (c) 2019 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+import { Terminal, ITerminalAddon } from 'xterm';
+
+export class SerializeAddon implements ITerminalAddon {
+  private _terminal: Terminal | undefined;
+
+  constructor() { }
+
+  public activate(terminal: Terminal): void {
+    this._terminal = terminal;
+  }
+
+  public serialize(rows?: number): string {
+    if (!this._terminal) {
+      return '';
+    }
+    const buffer = this._terminal.buffer;
+    const length = Math.max(0, Math.min((rows === undefined ? buffer.length : rows), buffer.length));
+    let data = '';
+
+    for (let i = 0; i < length; i++) {
+      const line = buffer.getLine(i);
+      const last = i === length - 1;
+      if (line) {
+        data += line.translateToString();
+      }
+      if (!last) {
+        data += '\r\n';
+      }
+    }
+
+    return data;
+  }
+
+  public dispose(): void {
+    if (this._terminal !== undefined) { }
+  }
+}