Serial Monitor message history

[philipmcgaw-cpi]

Describe the request

In Arduino IDE 1.x, you can 'up arrow' through the recently sent commands, to send the same one a second time, or even go further back in history.

Describe the current behavior

none, this functionality is missing.

Arduino IDE version

IDE 2.0.0-rc9.3

Operating system

macOS

Operating system version

Monterey

Additional context

No response

Issue checklist

• I searched for previous requests in the issue tracker
• I verified the feature was still missing when using the latest nightly build
• My request contains all necessary details

[philipmcgaw-cpi]

This issue is linked to a forum post: https://forum.arduino.cc/t/ide-2-0-0-rc9-3-serial-console-text-entry/1028868/3

[nmzaheer]

The legacy IDE has a separate class called commandHistory that implements this functionality at CommandHistory.java

public class CommandHistory {

  private final LinkedList<String> commandHistory = new LinkedList<String>();
  private final int maxHistorySize;
  private ListIterator<String> iterator = null;

which is consumed by SerialMonitor.java as

      public void keyPressed(KeyEvent e) {
        switch (e.getKeyCode()) {

          // Select previous command.
          case KeyEvent.VK_UP:
            if (commandHistory.hasPreviousCommand()) {
              textField.setText(
                  commandHistory.getPreviousCommand(textField.getText()));
            }
            break;

          // Select next command.
          case KeyEvent.VK_DOWN:
            if (commandHistory.hasNextCommand()) {
              textField.setText(commandHistory.getNextCommand());
            }
            break;

          // Reset history location, restoring the last unexecuted command.
          case KeyEvent.VK_ESCAPE:
            textField.setText(commandHistory.resetHistoryLocation());
            break;
        }
      }
    });

---

Proposal

1. I'm not sure whether Javascript has a built-in standard LinkedList implementation which means we will have to write an implementation of a LinkedList and then incorporate it into the Serial monitor.
2. We can implement the same functionality with an Array, however if you look at the commit history of commandHistory.java the codebase has moved from an initial Array implementation to the LinkedList version for performance reasons.

Looking forward to comments on how to proceed with this.