" vim:tabstop=2:shiftwidth=2:expandtab:textwidth=99
" Vimwiki autoload plugin file
" Description: Utility functions
" Home: https://github.com/vimwiki/vimwiki/


" Execute: string v:count times
function! vimwiki#u#count_exe(cmd) abort
    for i in range( max([1, v:count]) )
        exe a:cmd
    endfor
endfunction


function! vimwiki#u#trim(string, ...) abort
  let chars = ''
  if a:0 > 0
    let chars = a:1
  endif
  let res = substitute(a:string, '^[[:space:]'.chars.']\+', '', '')
  let res = substitute(res, '[[:space:]'.chars.']\+$', '', '')
  return res
endfunction


" Builtin cursor doesn't work right with unicode characters.
function! vimwiki#u#cursor(lnum, cnum) abort
  exe a:lnum
  exe 'normal! 0'.a:cnum.'|'
endfunction


" Returns: OS name, human readable
function! vimwiki#u#os_name() abort
  if vimwiki#u#is_windows()
    return 'Windows'
  elseif vimwiki#u#is_macos()
    return 'Mac'
  else
    return 'Linux'
  endif
endfunction


function! vimwiki#u#is_windows() abort
  return has('win32') || has('win64') || has('win95') || has('win16')
endfunction


function! vimwiki#u#is_macos() abort
  if has('mac') || has('macunix') || has('gui_mac')
    return 1
  endif
  " that still doesn't mean we are not on Mac OS
  let os = substitute(system('uname'), '\n', '', '')
  return os ==? 'Darwin' || os ==? 'Mac'
endfunction


function! vimwiki#u#count_first_sym(line) abort
  let first_sym = matchstr(a:line, '\S')
  return len(matchstr(a:line, first_sym.'\+'))
endfunction


function! vimwiki#u#escape(string) abort
  return escape(a:string, '~.*[]\^$')
endfunction


" Load concrete Wiki syntax: sets regexes and templates for headers and links
function! vimwiki#u#reload_regexes() abort
  execute 'runtime! syntax/vimwiki_'.vimwiki#vars#get_wikilocal('syntax').'.vim'
endfunction


" Load syntax-specific functionality
function! vimwiki#u#reload_regexes_custom() abort
  execute 'runtime! syntax/vimwiki_'.vimwiki#vars#get_wikilocal('syntax').'_custom.vim'
endfunction


" Backward compatible version of the built-in function shiftwidth()
if exists('*shiftwidth')
  function! vimwiki#u#sw() abort
    return shiftwidth()
  endfunc
else
  function! vimwiki#u#sw() abort
    return &shiftwidth
  endfunc
endif

" a:mode single character indicating the mode as defined by :h maparg
" a:key the key sequence to map
" a:plug the plug command the key sequence should be mapped to
" a:1 optional argument with the following functionality:
"   if a:1==1 then the hasmapto(<Plug>) check is skipped.
"     this can be used to map different keys to the same <Plug> definition
"   if a:1==2 then the mapping is not <buffer> specific i.e. it is global
function! vimwiki#u#map_key(mode, key, plug, ...) abort
  if a:0 && a:1 == 2
    " global mappings
    if !hasmapto(a:plug) && maparg(a:key, a:mode) ==# ''
      exe a:mode . 'map ' . a:key . ' ' . a:plug
    endif
  elseif a:0 && a:1 == 1
      " vimwiki buffer mappings, repeat mapping to the same <Plug> definition
      exe a:mode . 'map <buffer> ' . a:key . ' ' . a:plug
  else
    " vimwiki buffer mappings
    if !hasmapto(a:plug)
      exe a:mode . 'map <buffer> ' . a:key . ' ' . a:plug
    endif
  endif
endfunction


" returns 1 if line is a code block or math block
"
" The last two conditions are needed for this to correctly
" detect nested syntaxes within code blocks
function! vimwiki#u#is_codeblock(lnum) abort
  let syn_g = synIDattr(synID(a:lnum,1,1),'name')
  if  syn_g =~# 'Vimwiki\(Pre.*\|IndentedCodeBlock\|Math.*\)'
        \ || (syn_g !~# 'Vimwiki.*' && syn_g !=? '')
    return 1
  else
    return 0
  endif
endfunction

" Sets the filetype to vimwiki
" If g:vimwiki_filetypes variable is set
" the filetype will be vimwiki.<ft1>.<ft2> etc.
function! vimwiki#u#ft_set() abort
  let ftypelist = vimwiki#vars#get_global('filetypes')
  let ftype = 'vimwiki'
  for ftypeadd in ftypelist
    let ftype = ftype . '.' . ftypeadd
  endfor
  let &filetype = ftype
endfunction

" Returns: 1 if filetype is vimwiki, 0 else
" If multiple fileytpes are in use 1 is returned only if the
" first ft is vimwiki which should always be the case unless
" the user manually changes it to something else
function! vimwiki#u#ft_is_vw() abort
  " Clause: is filetype defined
  if &filetype ==# '' | return 0 | endif
  if split(&filetype, '\.')[0] ==? 'vimwiki'
    return 1
  else
    return 0
  endif
endfunction