How to enable code preview

[axot]

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Code preview works with Files command, and how to enable code preview for other commands, eg: Ag_raw

let g:fzf_files_options =
  \ '--preview "(coderay {} || cat {}) 2> /dev/null | head -'.&lines.'"'

[junegunn]

It's a little more complicated as we have to extract the file name and the line number from the output. This can be a start:

command! -bang -nargs=* AgRaw call fzf#vim#ag_raw(<q-args>, fzf#wrap('ag-raw',
\ {'options': "--preview 'coderay $(cut -d: -f1 <<< {}) | sed -n $(cut -d: -f2 <<< {}),\\$p | head -".&lines."'"}))

[axot]

Thank you for giving a hint, I am using this now, works great!

autocmd! VimEnter * command! -nargs=* -complete=file Ag :call fzf#vim#ag_raw(<q-args>, fzf#wrap('ag-raw',
\ {'options': "--preview 'coderay $(cut -d: -f1 <<< {}) 2> /dev/null | sed -n $(cut -d: -f2 <<< {}),\\$p | head -".&lines."'"}))

[termosa]

Preview works, but files are not opening. nvim receive the piece of code instead of file name.
Did you have this problem? Do you know how can it be solved?

[termosa]

@junegunn I've spent a night by trying to do the same for GitFiles (I'm not familiar with vimscript, at least a day ago). But the only option I found is to directly edit FZF plugin.
Is it possible to pass options to GitFiles from the .vimrc ? It would be nice to have a preview for all file-type searches (like Locate).

[junegunn]

@termosa Something like this?

call fzf#vim#gitfiles('', fzf#vim#with_preview('right'))

[termosa]

@junegunn thank you for the support! Have a nice day!

[guilala]

I am trying to get preview on marks: call fzf#vim#marks('', fzf#vim#with_preview('right'))
But like this, the preview function doesn't parse the line, column and url correctly resulting in 'File not found'. How can i make it work?

[CaioBianchi]

The above solution is no longer working. Thoughts?

[dylan-chong]

@junegunn Just wondering, the preview window is really really useful, but the preview window is only enabled for git by default, the normal :Files is does not show the preview window and unless I instead call call fzf#vim#files('', fzf#vim#with_preview('right'))

[lengerrong]

Use cat for preview is just too plain text, no highlight
let g:fzf_files_options =
\ '--preview "(coderay {} || cat {}) 2> /dev/null | head -'.&lines.'"'

We can use less and source-highlight to enhance the preview result on ubuntu.

#install source-highlight
sudo apt-get install source-highlight
#configure less with source-highlight
vim ~/.bashrc
export LESSOPEN="| /usr/share/source-highlight/src-hilite-lesspipe.sh %s"
export LESS=" -R "
source ~/.bashrc
#use less to preview
let g:fzf_files_options =
\ '--preview "(coderay {} || less {}) 2> /dev/null | head -'.&lines.'"'

[devenv]

So, is there a way to enable preview on fzf#vim#marks()?

[junegunn]

If you can come up with a command/script that generates preview output for each line of :marks, you can pass it to the function like so:

call fzf#vim#marks({'options': ['--preview', 'echo line = {}']})

[raducucu]

Was looking for preview on Marks, thanks for the hint.
I use '--preview', 'cat -n {-1} | egrep --color=always -C 10 ^[[:space:]]*{2}[[:space:]]', does exactly what I need.

[Glavnokoman]

Preview works, but files are not opening. nvim receive the piece of code instead of file name.
Did you have this problem? Do you know how can it be solved?

have the same issue with nvim. Did you find the solution?

[raducucu]

Preview works, but files are not opening. nvim receive the piece of code instead of file name.
Did you have this problem? Do you know how can it be solved?

have the same issue with nvim. Did you find the solution?

If current buffer is open, nvim return the line instead of file name. I use something like this:
(test -f {-1} && echo {-1} || echo ' . expand('%.p') . ') | xargs -I{} '.s:bin['preview'].' {}:{2}

[gennaro-tedesco]

call fzf#vim#gitfiles('', fzf#vim#with_preview('right'))

Strangely enough, this does not work for the GFiles? version, namely the git diff is not shown (the preview buffer is empty instead). Same behaviour happens with any custom configuration being passed to GFiles, the ? version stops producing diff preview.

Screenshot

The following line

command! -bang -nargs=? -complete=dir GFiles call fzf#vim#gitfiles('?', fzf#vim#with_preview('down'), <bang>0)

yields

whereas the preview works just fine if the custom option is not included.

[fedoranvar]

Here is preview for marks. (Took from https://github.com/chengzeyi/fzf-preview.vim)

function! s:fzf_preview_p(bang, ...) abort
    let preview_args = get(g:, 'fzf_preview_window', ['up:50%', 'ctrl-/'])
    if empty(preview_args)
        return { 'options': ['--preview-window', 'hidden'] }
    endif

    " For backward-compatiblity
    if type(preview_args) == type('')
        let preview_args = [preview_args]
    endif
    return call('fzf#vim#with_preview', extend(copy(a:000), preview_args))
endfunction

  command! -bar -bang MP
        \ call fzf#vim#marks(
        \     s:fzf_preview_p(<bang>0, {'placeholder': '$([ -r $(echo {4} | sed "s#^~#$HOME#") ] && echo {4} || echo ' . fzf#shellescape(expand('%')) . '):{2}',
        \               'options': '--preview-window +{2}-/2'}),
        \     <bang>0)

[ChHaeni]

Here is preview for marks. (Took from https://github.com/chengzeyi/fzf-preview.vim)

Thx!

Changing the command as below doesn't fail to display marks in the current file on an empty line:

  command! -bar -bang MP
        \ call fzf#vim#marks(
        \     s:fzf_preview_p(<bang>0, {'placeholder': '$([ -r $(echo {4} | sed "s#^~#$HOME#") ]  && [ -n {4} ] || echo ' . fzf#shellescape(expand('%')) . '):{2}',
        \               'options': '--preview-window +{2}-/2'}),
        \     <bang>0)