how can can I make the cursor position fixed

[sakhnik]

how can can I make the cursor position fixed

[voldikss]

Hi @sakhnik Have you found the solution for this problem?

I've made a patch which basically works

diff --git a/autoload/nvimgdb.vim b/autoload/nvimgdb.vim
index 71673f0..4fb1c66 100644
--- a/autoload/nvimgdb.vim
+++ b/autoload/nvimgdb.vim
@@ -99,3 +99,18 @@ function! nvimgdb#GlobalCleanup()
   delcommand GdbLopenBacktrace
   delcommand GdbLopenBreakpoints
 endfunction
+
+function! nvimgdb#KeepCursor(winid) abort
+  let curr = win_getid()
+  noa keepalt call win_gotoid(a:winid)
+  let wininfo = getwininfo(a:winid)[0]
+  let botline = wininfo['botline']
+  let topline = wininfo['topline']
+  let currlnum = line('.')
+  let lastlnum = line('$')
+  if botline - topline > &scrolloff && botline - currlnum < &scrolloff && botline < lastlnum
+    let topline += &scrolloff - (botline - currlnum)
+    call winrestview({'topline': topline})
+  endif
+  noa keepalt call win_gotoid(curr)
+endfunction
diff --git a/rplugin/python3/gdb/win.py b/rplugin/python3/gdb/win.py
index 87d453c..a7ee547 100644
--- a/rplugin/python3/gdb/win.py
+++ b/rplugin/python3/gdb/win.py
@@ -84,7 +84,11 @@ class Win(Common):
         # Ensure the jump window is available
         with self._saved_mode():
             self._ensure_jump_window()
-        if not self.jump_win:
+        if self.jump_win:
+            winid = self.vim.call("bufwinid", target_buf)
+            if winid > 0:
+                self.vim.call('nvimgdb#KeepCursor', winid)
+        else:
             raise AssertionError("No jump window")
 
         # The terminal buffer may contain the name of the source file

[sakhnik]

That's a good idea. You could set the option scrolloff to a positive number to keep the cursor off the edges. Consider using setlocal scrolloff=5 to make the change local to the window.
Could you please prepare a pull request?

[zhoupro]

#38 Please check the pr, tks.

[voldikss]

The problem still exists for me. Can anyone please reproduce it?

[sakhnik]

Thanks for the report! I think I understand the issue. The option 'scrolloff' only handles the cursor. So we just need to let the cursor follow the current line sign.
UPD: The code is actually there:

nvim-gdb/rplugin/python3/gdb/win.py

Line 106 in 531a575

self.jump_win.cursor = (line, 0)

, but it doesn't work. The cursor is only adjusted when I jump to the code window. Need to investigate.

[voldikss]

The scrolloff is set only the first time the code window is opened(BufEnter event is fired and the code related to set scrolloff is executed). After that the cursor won't enter the code window again, correspondingly the BufEnter event won't be fired.

[sakhnik]

That's a good solution, I like it. Could you please prepare a pull request?
I'd like to run it through the test suite, then we can accept it as is.
But there's a bigger change coming in the branch lua (fa1e3d9). I'll take your change into it.