let s:save_cpo = &cpo
set cpo&vim

" glob() wrapper which returns List
" and 'wildignore' does not affect
" this function's return value.
if v:version ># 703 ||
\  (v:version is 703 && has('patch465'))
  function! s:glob(expr)
    return glob(a:expr, 1, 1)
  endfunction
else
  function! s:glob(expr)
    let R = glob(a:expr, 1)
    return split(R, '\n')
  endfunction
endif

" globpath() wrapper which returns List
" and 'suffixes' and 'wildignore' does not affect
" this function's return value.
function! s:globpath(path, expr)
  let R = globpath(a:path, a:expr, 1)
  return split(R, '\n')
endfunction

" Wrapper functions for type().
let [
\   s:__TYPE_NUMBER,
\   s:__TYPE_STRING,
\   s:__TYPE_FUNCREF,
\   s:__TYPE_LIST,
\   s:__TYPE_DICT,
\   s:__TYPE_FLOAT] = [
      \   type(3),
      \   type(""),
      \   type(function('tr')),
      \   type([]),
      \   type({}),
      \   has('float') ? type(str2float('0')) : -1]
" __TYPE_FLOAT = -1 when -float
" This doesn't match to anything.

" Number or Float
function! s:is_numeric(Value)
  let _ = type(a:Value)
  return _ ==# s:__TYPE_NUMBER
  \   || _ ==# s:__TYPE_FLOAT
endfunction

" Number
function! s:is_integer(Value)
  echoerr 'Prelude.is_integer() is obsolete. Use its is_number() instead; they are equivalent.'
  return s:is_number(a:Value)
endfunction

function! s:is_number(Value)
  return type(a:Value) ==# s:__TYPE_NUMBER
endfunction

" Float
function! s:is_float(Value)
  return type(a:Value) ==# s:__TYPE_FLOAT
endfunction
" String
function! s:is_string(Value)
  return type(a:Value) ==# s:__TYPE_STRING
endfunction
" Funcref
function! s:is_funcref(Value)
  return type(a:Value) ==# s:__TYPE_FUNCREF
endfunction
" List
function! s:is_list(Value)
  return type(a:Value) ==# s:__TYPE_LIST
endfunction
" Dictionary
function! s:is_dict(Value)
  return type(a:Value) ==# s:__TYPE_DICT
endfunction

function! s:truncate_smart(str, max, footer_width, separator)
  echoerr 'Prelude.truncate_smart() is obsolete. Use its truncate_skipping() instead; they are equivalent.'
  return s:truncate_skipping(a:str, a:max, a:footer_width, a:separator)
endfunction

function! s:truncate_skipping(str, max, footer_width, separator)
  let width = s:wcswidth(a:str)
  if width <= a:max
    let ret = a:str
  else
    let header_width = a:max - s:wcswidth(a:separator) - a:footer_width
    let ret = s:strwidthpart(a:str, header_width) . a:separator
          \ . s:strwidthpart_reverse(a:str, a:footer_width)
  endif

  return s:truncate(ret, a:max)
endfunction

function! s:truncate(str, width)
  " Original function is from mattn.
  " http://github.com/mattn/googlereader-vim/tree/master

  if a:str =~# '^[\x00-\x7f]*$'
    return len(a:str) < a:width ?
          \ printf('%-'.a:width.'s', a:str) : strpart(a:str, 0, a:width)
  endif

  let ret = a:str
  let width = s:wcswidth(a:str)
  if width > a:width
    let ret = s:strwidthpart(ret, a:width)
    let width = s:wcswidth(ret)
  endif

  if width < a:width
    let ret .= repeat(' ', a:width - width)
  endif

  return ret
endfunction

function! s:strwidthpart(str, width)
  if a:width <= 0
    return ''
  endif
  let ret = a:str
  let width = s:wcswidth(a:str)
  while width > a:width
    let char = matchstr(ret, '.$')
    let ret = ret[: -1 - len(char)]
    let width -= s:wcswidth(char)
  endwhile

  return ret
endfunction
function! s:strwidthpart_reverse(str, width)
  if a:width <= 0
    return ''
  endif
  let ret = a:str
  let width = s:wcswidth(a:str)
  while width > a:width
    let char = matchstr(ret, '^.')
    let ret = ret[len(char) :]
    let width -= s:wcswidth(char)
  endwhile

  return ret
endfunction

if v:version >= 703
  " Use builtin function.
  function! s:wcswidth(str)
    return strwidth(a:str)
  endfunction
else
  function! s:wcswidth(str)
    if a:str =~# '^[\x00-\x7f]*$'
      return strlen(a:str)
    end

    let mx_first = '^\(.\)'
    let str = a:str
    let width = 0
    while 1
      let ucs = char2nr(substitute(str, mx_first, '\1', ''))
      if ucs == 0
        break
      endif
      let width += s:_wcwidth(ucs)
      let str = substitute(str, mx_first, '', '')
    endwhile
    return width
  endfunction

  " UTF-8 only.
  function! s:_wcwidth(ucs)
    let ucs = a:ucs
    if (ucs >= 0x1100
          \  && (ucs <= 0x115f
          \  || ucs == 0x2329
          \  || ucs == 0x232a
          \  || (ucs >= 0x2e80 && ucs <= 0xa4cf
          \      && ucs != 0x303f)
          \  || (ucs >= 0xac00 && ucs <= 0xd7a3)
          \  || (ucs >= 0xf900 && ucs <= 0xfaff)
          \  || (ucs >= 0xfe30 && ucs <= 0xfe6f)
          \  || (ucs >= 0xff00 && ucs <= 0xff60)
          \  || (ucs >= 0xffe0 && ucs <= 0xffe6)
          \  || (ucs >= 0x20000 && ucs <= 0x2fffd)
          \  || (ucs >= 0x30000 && ucs <= 0x3fffd)
          \  ))
      return 2
    endif
    return 1
  endfunction
endif

let s:is_windows = has('win16') || has('win32') || has('win64') || has('win95')
let s:is_cygwin = has('win32unix')
let s:is_mac = !s:is_windows && !s:is_cygwin
      \ && (has('mac') || has('macunix') || has('gui_macvim') ||
      \   (!isdirectory('/proc') && executable('sw_vers')))
let s:is_unix = has('unix')

function! s:is_windows()
  return s:is_windows
endfunction

function! s:is_cygwin()
  return s:is_cygwin
endfunction

function! s:is_mac()
  return s:is_mac
endfunction

function! s:is_unix()
  return s:is_unix
endfunction

function! s:print_error(message)
  echohl ErrorMsg
  for m in split(a:message, "\n")
    echomsg m
  endfor
  echohl None
endfunction

function! s:smart_execute_command(action, word)
  execute a:action . ' ' . (a:word == '' ? '' : '`=a:word`')
endfunction

function! s:escape_file_searching(buffer_name)
  return escape(a:buffer_name, '*[]?{}, ')
endfunction

function! s:escape_pattern(str)
  return escape(a:str, '~"\.^$[]*')
endfunction

" iconv() wrapper for safety.
function! s:iconv(expr, from, to)
  if a:from == '' || a:to == '' || a:from ==? a:to
    return a:expr
  endif
  let result = iconv(a:expr, a:from, a:to)
  return result != '' ? result : a:expr
endfunction

" Like builtin getchar() but returns string always.
function! s:getchar(...)
  let c = call('getchar', a:000)
  return type(c) == type(0) ? nr2char(c) : c
endfunction

" Like builtin getchar() but returns string always.
" and do inputsave()/inputrestore() before/after getchar().
function! s:getchar_safe(...)
  let c = s:input_helper('getchar', a:000)
  return type(c) == type("") ? c : nr2char(c)
endfunction

" Like builtin getchar() but
" do inputsave()/inputrestore() before/after input().
function! s:input_safe(...)
    return s:input_helper('input', a:000)
endfunction

" Do inputsave()/inputrestore() before/after calling a:funcname.
function! s:input_helper(funcname, args)
    let success = 0
    if inputsave() !=# success
        throw 'inputsave() failed'
    endif
    try
        return call(a:funcname, a:args)
    finally
        if inputrestore() !=# success
            throw 'inputrestore() failed'
        endif
    endtry
endfunction

function! s:set_default(var, val)
  if !exists(a:var) || type({a:var}) != type(a:val)
    let {a:var} = a:val
  endif
endfunction

function! s:set_dictionary_helper(variable, keys, pattern)
  for key in split(a:keys, '\s*,\s*')
    if !has_key(a:variable, key)
      let a:variable[key] = a:pattern
    endif
  endfor
endfunction

function! s:substitute_path_separator(path)
  return s:is_windows ? substitute(a:path, '\\', '/', 'g') : a:path
endfunction

function! s:path2directory(path)
  return s:substitute_path_separator(isdirectory(a:path) ? a:path : fnamemodify(a:path, ':p:h'))
endfunction

function! s:path2project_directory(path, ...)
  let is_allow_empty = get(a:000, 0, 0)
  let search_directory = s:path2directory(a:path)
  let directory = ''

  " Search VCS directory.
  for vcs in ['.git', '.bzr', '.hg', '.svn']
    let find_directory = s:escape_file_searching(search_directory)
    let d = finddir(vcs, find_directory . ';')
    if d == ''
      continue
    endif

    let directory = fnamemodify(d, ':p:h:h')

    if vcs ==# '.svn'
      " Search parent directories.
      let parent_directory = s:path2directory(
            \ fnamemodify(directory, ':h'))

      if parent_directory != ''
        let d = finddir(vcs, parent_directory . ';')
        if d != ''
          let directory = s:path2project_directory(parent_directory)
        endif
      endif
    endif
  endfor

  " Search project file.
  if directory == ''
    for d in ['build.xml', 'prj.el', '.project', 'pom.xml',
          \ 'Makefile', 'configure', 'Rakefile', 'NAnt.build', 'tags', 'gtags']
      let d = findfile(d, s:escape_file_searching(search_directory) . ';')
      if d != ''
        let directory = fnamemodify(d, ':p:h')
        break
      endif
    endfor
  endif

  if directory == ''
    " Search /src/ directory.
    let base = s:substitute_path_separator(search_directory)
    if base =~# '/src/'
      let directory = base[: strridx(base, '/src/') + 3]
    endif
  endif

  if directory == '' && !is_allow_empty
    " Use original path.
    let directory = search_directory
  endif

  return s:substitute_path_separator(directory)
endfunction

" Check vimproc.
function! s:has_vimproc()
  if !exists('s:exists_vimproc')
    try
      call vimproc#version()
      let s:exists_vimproc = 1
    catch
      let s:exists_vimproc = 0
    endtry
  endif
  return s:exists_vimproc
endfunction

function! s:system(str, ...)
  let command = a:str
  let input = a:0 >= 1 ? a:1 : ''
  let command = s:iconv(command, &encoding, 'char')
  let input = s:iconv(input, &encoding, 'char')

  if a:0 == 0
    let output = s:has_vimproc() ?
          \ vimproc#system(command) : system(command)
  elseif a:0 == 1
    let output = s:has_vimproc() ?
          \ vimproc#system(command, input) : system(command, input)
  else
    " ignores 3rd argument unless you have vimproc.
    let output = s:has_vimproc() ?
          \ vimproc#system(command, input, a:2) : system(command, input)
  endif

  let output = s:iconv(output, 'char', &encoding)

  return output
endfunction

function! s:get_last_status()
  return s:has_vimproc() ?
        \ vimproc#get_last_status() : v:shell_error
endfunction

let &cpo = s:save_cpo
unlet s:save_cpo

" vim:set et ts=2 sts=2 sw=2 tw=0: