" Test 'statusline'
"
" Not tested yet:
"   %a
"   %N
"   %T
"   %X

source view_util.vim

func s:get_statusline()
  return ScreenLines(&lines - 1, &columns)[0]
endfunc

func StatuslineWithCaughtError()
  let s:func_in_statusline_called = 1
  try
    call eval('unknown expression')
  catch
  endtry
  return ''
endfunc

func StatuslineWithError()
  let s:func_in_statusline_called = 1
  call eval('unknown expression')
  return ''
endfunc

" Function used to display syntax group.
func SyntaxItem()
  call assert_equal(s:expected_curbuf, g:actual_curbuf)
  call assert_equal(s:expected_curwin, g:actual_curwin)
  return synIDattr(synID(line("."), col("."),1), "name")
endfunc

func Test_caught_error_in_statusline()
  let s:func_in_statusline_called = 0
  set laststatus=2
  let statusline = '%{StatuslineWithCaughtError()}'
  let &statusline = statusline
  redrawstatus
  call assert_true(s:func_in_statusline_called)
  call assert_equal(statusline, &statusline)
  set statusline=
endfunc

func Test_statusline_will_be_disabled_with_error()
  let s:func_in_statusline_called = 0
  set laststatus=2
  let statusline = '%{StatuslineWithError()}'
  try
    let &statusline = statusline
    redrawstatus
  catch
  endtry
  call assert_true(s:func_in_statusline_called)
  call assert_equal('', &statusline)
  set statusline=
endfunc

func Test_statusline()
  new Xstatusline
  only
  set laststatus=2
  set splitbelow
  call setline(1, range(1, 10000))

  " %b: Value of character under cursor.
  " %B: As above, in hexadecimal.
  call cursor(9000, 1)
  set statusline=%b,%B
  call assert_match('^57,39\s*$', s:get_statusline())

  " %o: Byte number in file of byte under cursor, first byte is 1.
  " %O: As above, in hexadecimal.
  set statusline=%o,%O
  set fileformat=dos
  call assert_match('^52888,CE98\s*$', s:get_statusline())
  set fileformat=mac
  call assert_match('^43889,AB71\s*$', s:get_statusline())
  set fileformat=unix
  call assert_match('^43889,AB71\s*$', s:get_statusline())
  set fileformat&

  " %f: Path to the file in the buffer, as typed or relative to current dir.
  set statusline=%f
  call assert_match('^Xstatusline\s*$', s:get_statusline())

  " %F: Full path to the file in the buffer.
  set statusline=%F
  call assert_match('/testdir/Xstatusline\s*$', s:get_statusline())

  " %h: Help buffer flag, text is "[help]".
  " %H: Help buffer flag, text is ",HLP".
  set statusline=%h,%H
  call assert_match('^,\s*$', s:get_statusline())
  help
  call assert_match('^\[Help\],HLP\s*$', s:get_statusline())
  helpclose

  " %k: Value of "b:keymap_name" or 'keymap'
  "     when :lmap mappings are being used: <keymap>"
  set statusline=%k
  if has('keymap')
    set keymap=esperanto
    call assert_match('^<Eo>\s*$', s:get_statusline())
    set keymap&
  else
    call assert_match('^\s*$', s:get_statusline())
  endif

  " %l: Line number.
  " %L: Number of line in buffer.
  " %c: Column number.
  set statusline=%l/%L,%c
  call assert_match('^9000/10000,1\s*$', s:get_statusline())

  " %m: Modified flag, text is "[+]", "[-]" if 'modifiable' is off.
  " %M: Modified flag, text is ",+" or ",-".
  set statusline=%m%M
  call assert_match('^\[+\],+\s*$', s:get_statusline())
  set nomodifiable
  call assert_match('^\[+-\],+-\s*$', s:get_statusline())
  write
  call assert_match('^\[-\],-\s*$', s:get_statusline())
  set modifiable&
  call assert_match('^\s*$', s:get_statusline())

  " %n: Buffer number.
  set statusline=%n
  call assert_match('^'.bufnr('%').'\s*$', s:get_statusline())

  " %p: Percentage through file in lines as in CTRL-G.
  " %P: Percentage through file of displayed window.
  set statusline=%p,%P
  0
  call assert_match('^0,Top\s*$', s:get_statusline())
  norm G
  call assert_match('^100,Bot\s*$', s:get_statusline())
  9000
  " Don't check the exact percentage as it depends on the window size
  call assert_match('^90,\(Top\|Bot\|\d\+%\)\s*$', s:get_statusline())

  " %q: "[Quickfix List]", "[Location List]" or empty.
  set statusline=%q
  call assert_match('^\s*$', s:get_statusline())
  copen
  call assert_match('^\[Quickfix List\]\s*$', s:get_statusline())
  cclose
  lexpr getline(1, 2)
  lopen
  call assert_match('^\[Location List\]\s*$', s:get_statusline())
  lclose

  " %r: Readonly flag, text is "[RO]".
  " %R: Readonly flag, text is ",RO".
  set statusline=%r,%R
  call assert_match('^,\s*$', s:get_statusline())
  help
  call assert_match('^\[RO\],RO\s*$', s:get_statusline())
  helpclose

  " %t: File name (tail) of file in the buffer.
  set statusline=%t
  call assert_match('^Xstatusline\s*$', s:get_statusline())

  " %v: Virtual column number.
  " %V: Virtual column number as -{num}. Not displayed if equal to 'c'.
  call cursor(9000, 2)
  set statusline=%v,%V
  call assert_match('^2,\s*$', s:get_statusline())
  set virtualedit=all
  norm 10|
  call assert_match('^10,-10\s*$', s:get_statusline())
  set virtualedit&

  " %w: Preview window flag, text is "[Preview]".
  " %W: Preview window flag, text is ",PRV".
  set statusline=%w%W
  call assert_match('^\s*$', s:get_statusline())
  pedit
  wincmd j
  call assert_match('^\[Preview\],PRV\s*$', s:get_statusline())
  pclose

  " %y: Type of file in the buffer, e.g., "[vim]". See 'filetype'.
  " %Y: Type of file in the buffer, e.g., ",VIM". See 'filetype'.
  set statusline=%y\ %Y
  call assert_match('^\s*$', s:get_statusline())
  setfiletype vim
  call assert_match('^\[vim\] VIM\s*$', s:get_statusline())

  " %=: Separation point between left and right aligned items.
  set statusline=foo%=bar
  call assert_match('^foo\s\+bar\s*$', s:get_statusline())

  " Test min/max width, leading zeroes, left/right justify.
  set statusline=%04B
  call cursor(9000, 1)
  call assert_match('^0039\s*$', s:get_statusline())
  set statusline=#%4B#
  call assert_match('^#  39#\s*$', s:get_statusline())
  set statusline=#%-4B#
  call assert_match('^#39  #\s*$', s:get_statusline())
  set statusline=%.6f
  call assert_match('^<sline\s*$', s:get_statusline())

  " %<: Where to truncate.
  " First check with when %< should not truncate with many columns
  exe 'set statusline=a%<b' . repeat('c', &columns - 3) . 'd'
  call assert_match('^abc\+d$', s:get_statusline())
  exe 'set statusline=a' . repeat('b', &columns - 2) . '%<c'
  call assert_match('^ab\+c$', s:get_statusline())
  " Then check when %< should truncate when there with too few columns.
  exe 'set statusline=a%<b' . repeat('c', &columns - 2) . 'd'
  call assert_match('^a<c\+d$', s:get_statusline())
  exe 'set statusline=a' . repeat('b', &columns - 1) . '%<c'
  call assert_match('^ab\+>$', s:get_statusline())

  "%{: Evaluate expression between '%{' and '}' and substitute result.
  syntax on
  let s:expected_curbuf = string(bufnr(''))
  let s:expected_curwin = string(win_getid())
  set statusline=%{SyntaxItem()}
  call assert_match('^vimNumber\s*$', s:get_statusline())
  s/^/"/
  call assert_match('^vimLineComment\s*$', s:get_statusline())
  syntax off

  "%(: Start of item group.
  set statusline=ab%(cd%q%)de
  call assert_match('^abde\s*$', s:get_statusline())
  copen
  call assert_match('^abcd\[Quickfix List]de\s*$', s:get_statusline())
  cclose

  " %#: Set highlight group. The name must follow and then a # again.
  set statusline=ab%#Todo#cd%#Error#ef
  call assert_match('^abcdef\s*$', s:get_statusline())
  let sa1=screenattr(&lines - 1, 1)
  let sa2=screenattr(&lines - 1, 3)
  let sa3=screenattr(&lines - 1, 5)
  call assert_notequal(sa1, sa2)
  call assert_notequal(sa1, sa3)
  call assert_notequal(sa2, sa3)
  call assert_equal(sa1, screenattr(&lines - 1, 2))
  call assert_equal(sa2, screenattr(&lines - 1, 4))
  call assert_equal(sa3, screenattr(&lines - 1, 6))
  call assert_equal(sa3, screenattr(&lines - 1, 7))

  " %*: Set highlight group to User{N}
  set statusline=a%1*b%0*c
  call assert_match('^abc\s*$', s:get_statusline())
  let sa1=screenattr(&lines - 1, 1)
  let sa2=screenattr(&lines - 1, 2)
  let sa3=screenattr(&lines - 1, 3)
  call assert_equal(sa1, sa3)
  call assert_notequal(sa1, sa2)

  " An empty group that contains highlight changes
  let g:a = ''
  set statusline=ab%(cd%1*%{g:a}%*%)de
  call assert_match('^abde\s*$', s:get_statusline())
  let sa1=screenattr(&lines - 1, 1)
  let sa2=screenattr(&lines - 1, 4)
  call assert_equal(sa1, sa2)
  let g:a = 'X'
  call assert_match('^abcdXde\s*$', s:get_statusline())
  let sa1=screenattr(&lines - 1, 1)
  let sa2=screenattr(&lines - 1, 5)
  let sa3=screenattr(&lines - 1, 7)
  call assert_equal(sa1, sa3)
  call assert_notequal(sa1, sa2)

  let g:a = ''
  set statusline=ab%1*%(cd%*%{g:a}%1*%)de
  call assert_match('^abde\s*$', s:get_statusline())
  let sa1=screenattr(&lines - 1, 1)
  let sa2=screenattr(&lines - 1, 4)
  call assert_notequal(sa1, sa2)
  let g:a = 'X'
  call assert_match('^abcdXde\s*$', s:get_statusline())
  let sa1=screenattr(&lines - 1, 1)
  let sa2=screenattr(&lines - 1, 3)
  let sa3=screenattr(&lines - 1, 5)
  let sa4=screenattr(&lines - 1, 7)
  call assert_notequal(sa1, sa2)
  call assert_equal(sa1, sa3)
  call assert_equal(sa2, sa4)

  " An empty group that contains highlight changes and doesn't reset them
  let g:a = ''
  set statusline=ab%(cd%1*%{g:a}%)de
  call assert_match('^abcdde\s*$', s:get_statusline())
  let sa1=screenattr(&lines - 1, 1)
  let sa2=screenattr(&lines - 1, 5)
  call assert_notequal(sa1, sa2)
  let g:a = 'X'
  call assert_match('^abcdXde\s*$', s:get_statusline())
  let sa1=screenattr(&lines - 1, 1)
  let sa2=screenattr(&lines - 1, 5)
  let sa3=screenattr(&lines - 1, 7)
  call assert_notequal(sa1, sa2)
  call assert_equal(sa2, sa3)

  let g:a = ''
  set statusline=ab%1*%(cd%*%{g:a}%)de
  call assert_match('^abcdde\s*$', s:get_statusline())
  let sa1=screenattr(&lines - 1, 1)
  let sa2=screenattr(&lines - 1, 3)
  let sa3=screenattr(&lines - 1, 5)
  call assert_notequal(sa1, sa2)
  call assert_equal(sa1, sa3)
  let g:a = 'X'
  call assert_match('^abcdXde\s*$', s:get_statusline())
  let sa1=screenattr(&lines - 1, 1)
  let sa2=screenattr(&lines - 1, 3)
  let sa3=screenattr(&lines - 1, 5)
  let sa4=screenattr(&lines - 1, 7)
  call assert_notequal(sa1, sa2)
  call assert_equal(sa1, sa3)
  call assert_equal(sa1, sa4)

  let g:a = ''
  set statusline=%#Error#{%(\ %{g:a}\ %)}
  call assert_match('^{}\s*$', s:get_statusline())
  let g:a = 'X'
  call assert_match('^{ X }\s*$', s:get_statusline())

  " %%: a percent sign.
  set statusline=10%%
  call assert_match('^10%\s*$', s:get_statusline())

  " %!: evaluated expression is used as the option value
  set statusline=%!2*3+1
  call assert_match('7\s*$', s:get_statusline())

  func GetNested()
    call assert_equal(string(win_getid()), g:actual_curwin)
    call assert_equal(string(bufnr('')), g:actual_curbuf)
    return 'nested'
  endfunc
  func GetStatusLine()
    call assert_equal(win_getid(), g:statusline_winid)
    return 'the %{GetNested()} line'
  endfunc
  set statusline=%!GetStatusLine()
  call assert_match('the nested line', s:get_statusline())
  call assert_false(exists('g:actual_curwin'))
  call assert_false(exists('g:actual_curbuf'))
  call assert_false(exists('g:statusline_winid'))
  delfunc GetNested
  delfunc GetStatusLine

  " Check statusline in current and non-current window
  " with the 'fillchars' option.
  set fillchars=stl:^,stlnc:=,vert:\|,fold:-,diff:-
  vsplit
  set statusline=x%=y
  call assert_match('^x^\+y^x=\+y$', s:get_statusline())
  set fillchars&
  close

  %bw!
  call delete('Xstatusline')
  set statusline&
  set laststatus&
  set splitbelow&
endfunc
