wip

internal/vt/emulator.go

@@ -57,6 +57,15 @@ type Emulator interface {
 	// ActiveScreen reports whether we are on the primary or alternate buffer.
 	ActiveScreen() (Screen, error)
 
+	// ScrollViewportTop moves the viewport to the top of the scrollback.
+	ScrollViewportTop() error
+
+	// ScrollViewportBottom moves the viewport back to the active area.
+	ScrollViewportBottom() error
+
+	// ScrollViewportDelta moves the viewport by `delta` rows (negative = up).
+	ScrollViewportDelta(delta int) error
+
 	// OnWritePTY registers a callback that fires when the emulator wants
 	// to write bytes back to the PTY master (e.g. responses to DA / DSR
 	// queries). The callback runs synchronously inside Write and must not