[scintilla:bugs] #2416 SciTE doesn't maintain scroll position when switching tabs
Piotr Fusik
[bugs:#2416] SciTE doesn't maintain scroll position when switching tabs
Status: open
Group: Bug
Created: Tue Nov 21, 2023 10:51 AM UTC by Piotr Fusik
Last Updated: Tue Nov 21, 2023 10:51 AM UTC
Owner: nobody
Attachments:
- scite-wrap-scroll.txt (1.4 kB; text/plain)
Environment:
- SciTE 5.4.0
- Windows 11 with latest updates
- 4K screen with 200% scale set in Windows
Steps:
- Open the attached scite-wrap-scroll.txt file in SciTE
- Select Options / Wrap
- Open any other tab (for example Ctrl+N)
- Scroll down in scite-wrap-scroll.txt so that line 10 is at the top
- Press Ctrl+Tab twice
Expected:
- File remains with line 10 at the top
Actual:
- File scrolled to line 7
This hinders working with files in wrap mode.
See the recording at https://www.youtube.com/watch?v=auWRXrE9zwE
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Neil Hodgson
- labels: --> scintilla, scite, wrap
- status: open --> open-wont-fix
- Priority: 5 --> 4
- Comment:
Most wrapping issues are due to wrapping occurring as a background task.
What is happening here is that SciTE switches to the document but has no wrapping. It tries to scroll to line 10 but that would leave lines beyond the document end appearing in the window. Therefore, it instead scrolls so that the end of the file is the last line in the window. In your case max_line - window_height_in_lines = 7 so it scrolls to line 7. After this, wrapping occurs as a background task with each portion of wrapping maintaining the top_line 7.
This will not occur if there are more than window_height_in_lines after your scroll position. The issue can be worked around by allowing display of whitespace after the file end with end.at.last.line=0.
[bugs:#2416] SciTE doesn't maintain scroll position when switching tabs
Status: open-wont-fix
Group: Bug
Labels: scintilla scite wrap
Created: Tue Nov 21, 2023 10:51 AM UTC by Piotr Fusik
Last Updated: Tue Nov 21, 2023 10:51 AM UTC
Owner: nobody
Attachments:
SilverDirk
I'm having a similar issue, but shouldn't be affected by wrapping. I have SciTE 5.5.5 with Scintilla 5.5.5 compiled for GTK:3.24.49, on Arch Linux. Wrapping is enabled, but none of the lines in these files have wrapped.
An example: Starting from a file with 689 lines (physical lines, not wrapped) scrolled to look at lines 428-498 and with my cursor on line 485, I switch tabs to look at a file with 173 lines total. I scroll up to line 1 of the second tab and put the cursor on line 1. When I switch back to the original tab, it is viewing lines 103-173. Thankfully my cursor is still on 485 so touching an arrow key brings me back to where I left off, but it's still fairly annoying.
I added your workaround of end.at.last.line=0 and restarted SciTE but it had no effect on the problem (but I can now scroll down until the last line is the top of the screen, so I think it took effect).
[bugs:#2416] SciTE doesn't maintain scroll position when switching tabs
Status: open-wont-fix
Group: Bug
Labels: scintilla scite wrap
Created: Tue Nov 21, 2023 10:51 AM UTC by Piotr Fusik
Last Updated: Tue Nov 21, 2023 09:59 PM UTC
Owner: nobody
Attachments:
Neil Hodgson
That appears to be a different and new problem. I have reproduced it on GTK/Linux but not on Windows. It may be related to the recent feature that remembers the selection and scroll position for undo.
[bugs:#2416] SciTE doesn't maintain scroll position when switching tabs
Status: open-wont-fix
Group: Bug
Labels: scintilla scite wrap
Created: Tue Nov 21, 2023 10:51 AM UTC by Piotr Fusik
Last Updated: Tue Apr 29, 2025 06:16 PM UTC
Owner: nobody
Attachments:
Neil Hodgson
Likely caused by the fix to [#2322] where there were problems with updating scroll bars in some contexts. The fix deferred changing scroll bars to idle time. That means that the the scroll range hasn't been extended at the time setting the vertical scroll position is attempted so it is capped to the current range which is set to the number of lines in the previous file.
Potential fixes include narrowing the set of contexts where this deferral occurs. Perhaps the case where the application changes documents with SCI_GETDOCPOINTER can perform a synchronous change to the vertical scroll range since the application is likely to do that outside any other changes to the Scintilla widget. Since the above bug occurred on Xorg and hasn't been seen on Wayland, there could be a change to always update scroll bars synchronously on Wayland.
[bugs:#2416] SciTE doesn't maintain scroll position when switching tabs
Status: open-wont-fix
Group: Bug
Labels: scintilla scite wrap
Created: Tue Nov 21, 2023 10:51 AM UTC by Piotr Fusik
Last Updated: Wed Apr 30, 2025 11:11 PM UTC
Owner: nobody
Attachments:
Neil Hodgson
Should check if Xorg or Wayland active.
Potential change for Wayland:
--- a/gtk/ScintillaGTK.cxx Sun Apr 27 09:53:31 2025 +1000
+++ b/gtk/ScintillaGTK.cxx Fri May 02 11:23:29 2025 +1000
@@ -1162,6 +1166,15 @@
}
void ScintillaGTK::SetScrollBars() {
+#if defined(GDK_WINDOWING_WAYLAND)
+ GdkDisplay *pdisplay = gdk_display_get_default();
+ if (GDK_IS_WAYLAND_DISPLAY(pdisplay)) {
+ // On Wayland, perform synchronous resize
+ ChangeScrollBars();
+ return;
+ }
+#endif
+
if (scrollBarIdleID) {
// Only allow one scroll bar change to be queued
return;
[bugs:#2416] SciTE doesn't maintain scroll position when switching tabs
Status: open-wont-fix
Group: Bug
Labels: scintilla scite wrap
Created: Tue Nov 21, 2023 10:51 AM UTC by Piotr Fusik
Last Updated: Fri May 02, 2025 02:00 AM UTC
Owner: nobody
Attachments:
Neil Hodgson
Committed change [9803ff] that, for GTK, synchronously resets the scroll bar to its full range inside SCI_SETDOCPOINTER. This fixes just the non-wrap case reported by SilverDirk above and not the initial wrap mode problem reported.
The above change for Wayland may help with other cases so may be applied in the future.
[bugs:#2416] SciTE doesn't maintain scroll position when switching tabs
Status: open-wont-fix
Group: Bug
Labels: scintilla scite wrap
Created: Tue Nov 21, 2023 10:51 AM UTC by Piotr Fusik
Last Updated: Fri May 02, 2025 02:03 AM UTC
Owner: nobody
Attachments:
Neil Hodgson
- status: open-wont-fix --> closed-fixed
[bugs:#2416] SciTE doesn't maintain scroll position when switching tabs
Status: closed-fixed
Group: Bug
Labels: scintilla scite wrap
Created: Tue Nov 21, 2023 10:51 AM UTC by Piotr Fusik
Last Updated: Mon May 05, 2025 06:51 AM UTC
Owner: nobody
Attachments: