Vim-airline: [ Question ] persistent fugitive branch in multiple splits

[rjshrjndrn]

Hi,
Thank you for the awesome plugin. I just have a question.
Is there any way to make the branch show persistently, even when the windows get resized.

With branch

Without branch in split

[chrisbra]

The window is too small to display it. You can try if changing this here fixes it: https://github.com/vim-airline/vim-airline/blob/1c3ae6077af76927f82f87e05a7b9fdfba47ce2c/autoload/airline/init.vim#L157-L159

[clason]

Is there some setting I can use in my init.vim? The line let g:airline#extensions#default#section_truncate_width = {} doesn't seem to make any difference for the branch and hunks sections.

[rjshrjndrn]

call airline#parts#define('branch', {
'raw': '',
'minwidth': 120})

Nope.. Nothing happened @chrisbra

[chrisbra]

You need to also define the default truncation width:

 let g:airline#extensions#default#section_truncate_width = {
    \ 'b': 79,
    \ 'x': 60,
    \ 'y': 88,
    \ 'z': 45,
    \ 'warning': 80,
    \ 'error': 80,
    \ })
   au VimEnter * call airline#parts#define('branch', {'raw': '', 'minwidth': 10})
   au VimEnter * let g:airline_section_b = airline#section#create(['hunks', 'branch'])

Make sure to use a small one for section b

[clason]

But the documentation says that an empty dict disables truncation completely -- which works for other parts, but apparently not for the hunks and branch parts?

[chrisbra]

You need to distinguish between section truncation and within a section minimum width for e.g the branch and hunk extension

Am 26.02.2019 um 11:46 schrieb Christian Clason [e-mail]:

But the documentation says that an empty dict disables truncation completely -- which works for other parts, but apparently not for the hunks and branch parts?

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[clason]

Ah, I see. But then I'm still a bit confused how #1877 lead to the changed behavior -- I thought only the way the minimum width is accessed was changed, not the widths themselves (which are still fixed at 100 resp. 120)?

[chrisbra]

Yes, it did not change the width itself.

[clason]

So why is it truncating now when it used not to before (for the same window size)? Maybe @maxnordlund can help me restore the old behavior via .vimrc?

[chrisbra]

it was always truncating.

[clason]

I'm sorry, I must have expressed myself poorly. What I mean is that for the same window size (~80 cols),

1. before commit eb0ddf6, airline showed branch and hunks where applicable,
2. after commit eb0ddf6, airline no longer shows branch and hunks.

(And I'm not trying to debate you here, just honestly trying to figure out what happened and how to fix it on my end. I do appreciate your time spent on this.)

[chrisbra]

Are you sure? I do not see this. Have you updated all plugins (fugitive, whatever plugin you use for hunks)? What exactly does :echo winwidth(0) tell you? Please try with a larger size around 120 columns first. Then try to find at what size it starts truncating?

[chrisbra]

also, what system are you using? Windows, Linux, gui non-gui? What Vim version?

[clason]

This is neovim (I know...), but vim/gvim (8.1.877) behaves the same, both on Linux and macOS, both tui and gui.

hunks are dropped on winwidth 100 and(!) below, branch is dropped below(!) winwidth 120 (so the behavior is not completely consistent

[chrisbra]

Yes and I believe this has always been the default for those widths.

[clason]

That's what I thought (and why I'm so confused). So the previous behavior was a bug (and the different behavior of branch and hunks is intended)?

(I'd prefer those never to be truncated and rather fileencoding be dropped or the filename be truncated. Is there some sort of precedence I can tinker with?)

[chrisbra]

Doesn't that does it for you? (You need to add a similar airline#parts#define() call for the hunk extension, defining the minimal width there.)

[clason]

It does; I was just wary of cargo-culting it without understanding what was going on. If the previous behavior (never truncating) was a bug and the current behavior is intended and needs to be overriden, then that's all I need to know. Thank you for your time!

(Quick related question, then I'll go my way: Is there a way to use the different formatters for the tabline also for the filename in section C?)

[chrisbra]

well, by default, vim-airline will use %f%m or %F%m depending on your autochdir setting. You could however create a custom function, that reformats the filename differently and stick that into section c instead.

[clason]

No, sorry, I spoke too soon -- it works only after redrawing the grid, but not when starting (except for neovim GUIs). Weird. Maybe I need a different autocommand? Here's what I have:

au VimEnter * call airline#parts#define('branch', {'raw': '', 'minwidth': 10})  
au VimEnter * call airline#parts#define('hunks', {'raw': '', 'minwidth': 10})     
au VimEnter * let g:airline_section_b = airline#section#create(['hunks', 'branch'])

(And I specifically was interested in reusing the airline formatters used for the tabline, which are pretty useful!)

[chrisbra]

What do you mean with redrawing the grid? Pressing ctrl-l? or using :AirlineRefresh? About the airline formatters, it might work, you would need to try it out.

[clason]

Either resize the window (gvim) or open a new split (tui) (ctrl-l doesn't suffice, but :AirlineRefresh does).

[chrisbra]

Okay, then you probably need to add this to the VimEnter autocommand.

[clason]

Yeah, that works -- seems a bit hacky, though. (But you're _the_ vim expert, of course, so I'm happy to take your word for it.) And thanks for your help!

[maxnordlund]

Hm, the only thing I can think of is that by setting an explicit minwidth the normal/global cutoff behavior kicks in and that somehow interferes with the custom one for hunks and branch.

https://github.com/vim-airline/vim-airline/blob/1c3ae6077af76927f82f87e05a7b9fdfba47ce2c/autoload/airline/init.vim#L154-L159

Try putting this in your vimrc:

" Remove explicit minwidth constraint
let hunks = airline#parts#get("hunks")
unlet hunks.minwidth
let branch = airline#parts#get("branch")
unlet branch.minwidth

" Must recreate the section to remove minwidth constraints
let g:airline_section_b = airline#section#create(['hunks', 'branch'])

[clason]

That results in errors:

line  248:
E716: Key not present in Dictionary: minwidth
line  250:
E716: Key not present in Dictionary: minwidth

[maxnordlund]

I didn't for me, but I ran it manually. So I guess on VimEnter? Or just source a file by hand.

[clason]

Yes, with au VimEnter (and AirlineRefresh) that indeed works.