I'm trying to make a vim plugin that will split the window on load and simulate a info bar at the top of my terminal. I've got it sorta working but I think I've either reached limits of my knowledge of vim syntax or there's a logic problem in my code.
The desired effect would be to do a reverse search for any declaration of a Perl subroutine form my current location in the active buffer and display the line in the top buffer. I'm also trying to make it skip that buffer when I switch buffers with <C-R>. My attempt at that so far can be seen in the mess of nested if statements.
Anyway, here's the code. I would greatly appreciate feedback from anyone.
(pastebin pastebin.com/8cuMPn1Q)
let s:current_function_bufname = 'Current\ Function\/Subroutine'
function! s:get_current_function_name(no_echo)
let lnum = line(".")
let col = col(".")
if a:no_echo
let s:current_function_name = getline(search("^[^s]sub .$", 'bW'))
else
echohl ModeMsg
echo getline(search("^[^s]sub .$", 'bW'))
"echo getline(search("^[^ \t#/]\{2}.[^:]\s$", 'bW'))
echohl None
endif
endfunction
let s:previous_winbufnr = 1
let s:current_function_name = ''
let s:current_function_buffer_created = 0
let s:current_function_bufnr = 2
function! s:show_current_function()
let total_buffers = winnr('$')
let current_winbufnr = winnr()
if s:previous_winbufnr != current_winbufnr
if bufname(current_winbufnr) == s:current_function_bufname
if s:previous_winbufnr < current_winbufnr
let i = current_winbufnr + 1
if i total_buffers
let i = 1
endif
if i == s:current_function_bufnr
let i = i + 1
endif
if i total buffers
let i = 1
endif
exec i.'wincmd w'
else
let i = current_winbufnr - 1
if i < 1
let i = total_buffers
endif
if i == s:current_function_bufnr
let i = i - 1
endif
if i < 1
let i = total_buffers
endif
try
exec i.'wincmd w'
finally
exec total_buffers.'wincmd w'
endtry
endif
endif
let s:previous_winbufnr = current_winbufnr
return 1
endif
if s:current_function_buffer_created == 0
exec 'top 1 split '.s:current_function_bufname
call s:set_as_scratch_buffer()
let s:current_function_buffer_created = 1
let s:current_function_bufnr = winnr()
endif
call s:activate_buffer_by_name(s:current_function_bufname)
setlocal modifiable
call s:get_current_function_name(1)
call setline(1, s:current_function_name)
setlocal nomodifiable
call s:activate_buffer_by_name(bufname(current_winbufnr))
endfunction
function! s:set_as_scratch_buffer()
setlocal noswapfile
setlocal nomodifiable
setlocal bufhidden=delete
setlocal buftype=nofile
setlocal nobuflisted
setlocal nonumber
setlocal nowrap
setlocal cursorline
endfunction
function! s:activate_buffer_by_name(name)
for i in range(1, winnr('$'))
let name = bufname(winbufnr(i))
let full_name = fnamemodify(bufname(winbufnr(i)), ':p')
if name == a:name || full_name == a:name
exec i.'wincmd w'
return 1
endif
endfor
return 0
endfunction
set laststatus=2
autocmd! CursorMoved,CursorMovedI,BufWinEnter * call s:show_current_function()
(pastebin pastebin.com/8cuMPn1Q)
similar to VIM: display custom reference bar on top of window
and http://vim.wikia.com/wiki/Show_current_function_name_in_C_programs
