" vim: et sw=2 sts=2

scriptencoding utf-8

" Function: #escape {{{1
function! sy#util#escape(path) abort
  if exists('+shellslash')
    let old_ssl = &shellslash
    if fnamemodify(&shell, ':t') == 'cmd.exe'
      set noshellslash
    else
      set shellslash
    endif
  endif

  let path = shellescape(a:path)

  if exists('old_ssl')
    let &shellslash = old_ssl
  endif

  return path
endfunction

" Function: #refresh_windows {{{1
function! sy#util#refresh_windows() abort
  if exists('*win_getid')
    let winid = win_getid()
  else
    let winnr = winnr()
  endif

  if !get(g:, 'signify_cmdwin_active')
    keepjumps windo if exists('b:sy') | call sy#start() | endif
  endif

  if exists('winid')
    call win_gotoid(winid)
  else
    execute winnr .'wincmd w'
  endif
endfunction

" Function: #hunk_text_object {{{1
function! sy#util#hunk_text_object(emptylines) abort
  execute sy#util#return_if_no_changes()

  let lnum  = line('.')
  let hunks = filter(copy(b:sy.hunks), 'v:val.start <= lnum && v:val.end >= lnum')

  if empty(hunks)
    echomsg 'signify: Here is no hunk.'
    return
  endif

  execute hunks[0].start
  normal! V

  if a:emptylines
    let lnum = hunks[0].end
    while getline(lnum+1) =~ '^$'
      let lnum += 1
    endwhile
    execute lnum
  else
    execute hunks[0].end
  endif
endfunction

" Function: #shell_redirect {{{1
function! sy#util#shell_redirect(path) abort
  " if shellredir contains a %s it is replaced with the path
  " otherwise, just append it (from :help shellredir:
  "   The name of the temporary file can be represented by '%s' if necessary
  "   (the file name is appended automatically if no %s appears in the value
  "   of this option)
  if &shellredir =~# '%s'
    return substitute(&shellredir, '\C%s', a:path, 'g')
  else
    return &shellredir .' '. a:path
  endif
endfunction

" Function: #chdir {{{1
function! sy#util#chdir() abort
  let chdir = haslocaldir()
        \ ? 'lcd'
        \ : (exists(':tcd') && haslocaldir(-1, 0)) ? 'tcd' : 'cd'
  return [getcwd(), chdir]
endfunction

" Function: #has_changes {{{1
function! sy#util#return_if_no_changes() abort
  if !exists('b:sy') || empty(b:sy.hunks)
    echomsg 'signify: There are no changes.'
    return 'return'
  endif
  return ''
endfunction

" Function: #execute {{{1
function! sy#util#execute(cmd) abort
  let lang = v:lang
  redir => output
    silent! execute a:cmd
  redir END
  silent! execute 'language message' lang
  return output
endfunction