<C-O> doesn't work in NERDTree

[qstrahl]

Procedure

1. I am in file /var/www/example
2. I jump to directory /var/www/derpherper/
3. I hit <C-O> to go back to /var/www/example

Erroneous Result

The cursor is placed on the last line in NERDTree

Expected Result

Vim jumps back to /var/www/example

[juanibiapina]

There are many bugs involving ctrl+o and nerd tree, it becomes unusable if you're using :e .

[lifecrisis]

I'm unable to replicate this problem right now. If either of you could provide more specific examples, I'd be willing to try and confirm.

[juanibiapina]

Steps:

• clear jump list
• create two files called 1 and 2
• :e 1
• :e 2
• :e . (with hijack, opens nerd tree)
• ctrl+o (goes to end of nerd tree, annoying but fine, maybe keepjumps would help here)
• ctrl+o (goes to file 1, wrong, end of jumps)
• ctrl+i (goes to file 2, correct)
• ctrl+i (goes to beginning of nerd tree, skipping end of nerd tree, wrong)

I just added this line from the documentation which fixes the behavior for this example test:

let NERDTreeCreatePrefix='silent keepalt keepjumps'

Although I still get jumps back to nerd tree and inside of it. I'm not sure I want this behavior. I'll live with my fix for a while and figure out later if I want nerdtree to mess with the jumplist at all.

[lifecrisis]

Very good work, @juanibiapina. This bug is confirmed.

[lifecrisis]

I discovered another instance of this problem just now:

1. Position the cursor on a directory node that is not the root.
2. Press P.
3. Press R to refresh the tree.
4. Press <C-O> and notice that the cursor jumps to the end of the NERDTree window.

There is clearly a problem with the way that the NERDTree does not preserve jumps when printing the tree to the tree window.

[juanibiapina]

The worst case is when ctrl+o does not work at all, even though jumplist is full of stuff. I can't reproduce it in isolation, although it happens to me everyday.

[juanibiapina]

I'm working on a different project now because nerdtree is too bloated and I don't use the drawer and per-tab windows anyway, but part of the fix for this is easy enough so you can port from here: juanibiapina/vim-lighttree@2521fe4

[lifecrisis]

Thanks, @juanibiapina! I had played with a similar fix, myself.

[PhilRunninger]

There is no single way to define what <C-O> and <C-I> do in the context of NERDTree. Should they jump between the selected roots of NERDTree? Or should they jump between selected files? What constitutes a file selection: selecting it, opening it, collapsing a folder? What happens when a folder is expanded; now <C-O> could jump back to the wrong location.

For all these reasons and more, I'm going to close this issue. If anyone proposes a viable specification for this functionality, I'll entertain it.