Fix viewport staying pinned to the top after ESC[3J clears the scrollback (#6081)

2026-08-10 11:38:58 +00:00
parent 8c9b9fdb9b
commit d6cfe3db5d
2 changed files with 53 additions and 0 deletions
@@ -1286,6 +1286,11 @@ export class InputHandler extends Disposable implements IInputHandler {
          this._activeBuffer.lines.trimStart(scrollBackSize);
          this._activeBuffer.ybase = Math.max(this._activeBuffer.ybase - scrollBackSize, 0);
          this._activeBuffer.ydisp = Math.max(this._activeBuffer.ydisp - scrollBackSize, 0);
+          // isUserScrolling tracks the normal buffer's viewport, so ED3 on the alt
+          // screen must not touch it
+          if (this._activeBuffer === this._bufferService.buffers.normal) {
+            this._bufferService.isUserScrolling = false;
+          }
          // Force a scroll event to refresh viewport
          this._onScroll.fire(0);
        }