Get undo to scroll to context

page200

When using the undo/redo feature, Notepad++ scrolls to the line where the change happened but not further. So I don’t see the lines above or below it.

How do I make it automatically scroll such that I see lines above and below the change? So how do I make it scroll the changed line to the center of the screen rather than the top or bottom of the screen?

PeterJones

@page200 ,

As you have guessed from two weeks with no reply, Notepad++ doesn’t have that feature.

I’m sorry no one had replied yet. Sometimes that happens if no one has a good idea right away.

I didn’t have time two weeks ago, but I did today, so I hacked up a pair of scripts for the PythonScript plugin.

Install PythonScript 3.0.22 or later per the PythonScript 3.0.x instructions in our PythonScript FAQ
Create and populate the new script undo_and_scroll.py using the source below and the instructions for “create” and “populate” in the FAQ
Create and populate the new script redo_and_scroll.py using the second source below and the same instructions
Verify them using Plugins > Python Script > Scripts > undo_and_scroll or redo_and_scroll
Once they are working, if you want, you can follow the FAQ instructions to create a shortcut for each (you could replace the Ctrl+Z and Ctrl+Y – but you’d have to use the shortcut mapper on the Scintilla commands page to remove those shortcuts from SCI_UNDO and SCI_REDO)

undo_and_scroll.py:

# encoding=utf-8
"""in response to https://community.notepad-plus-plus.org/topic/27122/

This does the UNDO then tries to scroll to approximate center
"""
from Npp import editor

# undo
editor.undo()

# find location after undo
pc = editor.getCurrentPos()
c = editor.lineFromPosition(pc)
editor.gotoLine(1)
editor.gotoLine(c)
editor.setCurrentPos(pc)

# try to center it
# this is counting >1 for a wrapped line, whereas the "Line" commands are logical line, but close enough
h = editor.linesOnScreen()
f = editor.getFirstVisibleLine()
s = int(c - h/2)

#console.write(f"h={h}, f={f}, c={c}, s={s}\n")
editor.lineScroll(0, s)

del(pc)
del(c)
del(h)
del(f)
del(s)

redo_and_scroll.py:

# encoding=utf-8
"""in response to https://community.notepad-plus-plus.org/topic/27122/

This does the REDO then tries to scroll to approximate center
"""
from Npp import editor

# redo
editor.redo()

# find location after undo
pc = editor.getCurrentPos()
c = editor.lineFromPosition(pc)
editor.gotoLine(1)
editor.gotoLine(c)
editor.setCurrentPos(pc)

# try to center it
# this is counting >1 for a wrapped line, whereas the "Line" commands are logical line, but close enough
h = editor.linesOnScreen()
f = editor.getFirstVisibleLine()
s = int(c - h/2)

#console.write(f"h={h}, f={f}, c={c}, s={s}\n")
editor.lineScroll(0, s)

del(pc)
del(c)
del(h)
del(f)
del(s)