" Test 'statusline'
"
" Not tested yet:
"   %N

source util/screendump.vim

func SetUp()
  set laststatus=2
endfunc

func TearDown()
  set laststatus&
endfunc

func s:get_statusline()
  redraw!
  if has('gui_running')
    sleep 1m
  endif
  " Read the screen directly after redraw! instead of going through
  " ScreenLines(), whose own redraw! may process events and change the window
  " layout between here and the screenstring() calls.
  let row = &lines - 1
  return join(map(range(1, &columns), 'screenstring(row, v:val)'), '')
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
  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
  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()
  CheckFeature quickfix

  " %a: Argument list ({current} of {max})
  set statusline=%a
  call assert_match('^\s*$', s:get_statusline())
  arglocal a1 a2
  rewind
  call assert_match('^ (1 of 2)\s*$', s:get_statusline())
  next
  call assert_match('^ (2 of 2)\s*$', s:get_statusline())
  e Xstatusline
  call assert_match('^ ((2) of 2)\s*$', s:get_statusline())

  only
  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())

  " Test for min and max width with %(. For some reason, if this test is moved
  " after the below test for the help buffer flag, then the code to truncate
  " the string is not executed.
  set statusline=%015(%f%)
  call assert_match('^    Xstatusline\s*$', s:get_statusline())
  set statusline=%.6(%f%)
  call assert_match('^<sline\s*$', s:get_statusline())
  set statusline=%.5(1234567%),%2.5(1234567%),%5.5(1234567%),%50.5(1234567%)
  call assert_match('^<4567,<4567,<4567,<4567\s*$', s:get_statusline())
  set statusline=%14f
  call assert_match('^   Xstatusline\s*$', s:get_statusline())
  set statusline=%.4L
  call assert_match('^10>3\s*$', s:get_statusline())
  for filler in ['-', '∙']
    exec 'set fillchars+=stl:'..filler
    set statusline=%-5(x%),%-5.(x%),%-5.5(x%),%-5.10(x%);
    call assert_match(substitute('^x____,x____,x____,x____;_*$', '_', filler, 'g'), s:get_statusline())
    set statusline=%5(x%),%5.(x%),%5.5(x%),%5.10(x%);
    call assert_match(substitute('^____x,____x,____x,____x;_*$', '_', filler, 'g'), s:get_statusline())
    set statusline=%.5(12🙂345%),%4.5(12🙂345%),%5.5(12🙂345%),%50.5(12🙂345%);
    call assert_match(substitute('^<345,<345,<345_,<345_;_*$', '_', filler, 'g'), s:get_statusline())
  endfor
  if has('linux')
    " This assumes MAXPATHL is 4096 bytes.
    set stl=%{%repeat('x',4096-6)%}%10(X%)
    set fillchars+=stl:-
    call assert_match('^<x\+----X$', s:get_statusline())
    set fillchars+=stl:∙
    call assert_match('^<x\+∙X$', s:get_statusline())
  endif
  set fillchars&

  " %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())
  " The exact percentage depends on the window height, so create a window with
  " known height.
  9000 | botright 10split | setlocal scrolloff=0 | normal! zb
  call assert_match('^90,89%\s*$', s:get_statusline())
  normal! zt
  call assert_match('^90,90%\s*$', s:get_statusline())
  " %P should result in a string with 3 in length when not translated.
  normal! 500zb
  call assert_match('^5, 4%\s*$', s:get_statusline())
  close

  " %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 list
  call assert_match('^10,-10\s*$', s:get_statusline())
  set virtualedit&
  exe "norm A\<Tab>\<Tab>a\<Esc>"
  " In list mode a <Tab> is shown as "^I", which is 2-wide.
  call assert_match('^9,-9\s*$', s:get_statusline())
  set list&
  " Now the second <Tab> ends at the 16th screen column.
  call assert_match('^17,-17\s*$', s:get_statusline())
  undo

  " %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
  pbuffer
  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*$', s:get_statusline())
  set statusline=foo%=bar%=baz
  call assert_match('^foo\s\+bar\s\+baz\s*$', s:get_statusline())
  set statusline=foo%=bar%=baz%=qux
  call assert_match('^foo\s\+bar\s\+baz\s\+qux\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

  " %0{: result of expression is inserted verbatim
  set statusline=%{'\ x'}
  call assert_match('^x\s*$', s:get_statusline())
  set statusline=%0{'\ x'}
  call assert_match('^ x\s*$', s:get_statusline())
  set statusline=%{'000'}
  call assert_match('^0\s*$', s:get_statusline())
  set statusline=%0{'000'}
  call assert_match('^000\s*$', s:get_statusline())

  "%{%expr%}: evaluates expressions present in result of expr
  func! Inner_eval()
    return '%n some other text'
  endfunc
  func! Outer_eval()
    return 'some text %{%Inner_eval()%}'
  endfunc
  set statusline=%{%Outer_eval()%}
  call assert_match('^some text ' . bufnr() . ' some other text\s*$', s:get_statusline())
  delfunc Inner_eval
  delfunc Outer_eval

  "%{%expr%}: Doesn't get stuck in recursion
  func! Recurse_eval()
    return '%{%Recurse_eval()%}'
  endfunc
  set statusline=%{%Recurse_eval()%}
  call assert_match('^%{%Recurse_eval()%}\s*$', s:get_statusline())
  delfunc Recurse_eval

  "%(: 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

  " Test statusline works with 80+ items
  function! StatusLabel()
    redrawstatus
    return '[label]'
  endfunc
  let statusline = '%{StatusLabel()}'
  for i in range(150)
    let statusline .= '%#TabLine' . (i % 2 == 0 ? 'Fill' : 'Sel') . '#' . string(i)[0]
  endfor
  let &statusline = statusline
  redrawstatus
  set statusline&
  delfunc StatusLabel


  " 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 splitbelow&
endfunc

func Test_statusline_trailing_percent_zero()
  " this was causing illegal memory access
  set laststatus=2 stl=%!%0
  call assert_fails('redraw', 'E15: Invalid expression: "%0"')
  set laststatus& stl&
endfunc

func Test_statusline_visual()
  func CallWordcount()
    call wordcount()
  endfunc
  new x1
  setl statusline=count=%{CallWordcount()}
  " buffer must not be empty
  call setline(1, 'hello')

  " window with more lines than x1
  new x2
  call setline(1, range(10))
  $
  " Visual mode in line below liast line in x1 should not give ml_get error
  call feedkeys("\<C-V>", "xt")
  redraw

  delfunc CallWordcount
  bwipe! x1
  bwipe! x2
endfunc

func Test_statusline_removed_group()
  CheckScreendump

  let lines =<< trim END
    scriptencoding utf-8
    set laststatus=2
    let &statusline = '%#StatColorHi2#%(✓%#StatColorHi2#%) Q≡'
  END
  call writefile(lines, 'XTest_statusline', 'D')

  let buf = RunVimInTerminal('-S XTest_statusline', {'rows': 10, 'cols': 50})
  call VerifyScreenDump(buf, 'Test_statusline_1', {})

  " clean up
  call StopVimInTerminal(buf)
endfunc

func Test_statusline_using_mode()
  CheckScreendump

  let lines =<< trim END
    setlocal statusline=-%{mode()}-
    split
    setlocal statusline=+%{mode()}+
  END
  call writefile(lines, 'XTest_statusline', 'D')

  let buf = RunVimInTerminal('-S XTest_statusline', {'rows': 7, 'cols': 50})
  call VerifyScreenDump(buf, 'Test_statusline_mode_1', {})

  call term_sendkeys(buf, ":")
  call VerifyScreenDump(buf, 'Test_statusline_mode_2', {})

  " clean up
  call term_sendkeys(buf, "close\<CR>")
  call StopVimInTerminal(buf)
endfunc

func Test_statusline_after_split_vsplit()
  only

  " Make the status line of each window show the window number.
  set ls=2 stl=%{winnr()}

  split | redraw
  vsplit | redraw

  " The status line of the third window should read '3' here.
  call assert_equal('3', nr2char(screenchar(&lines - 1, 1)))

  only
  set ls& stl&
endfunc

" Test using a multibyte character for 'stl' and 'stlnc' items in 'fillchars'
" with a custom 'statusline'
func Test_statusline_mbyte_fillchar()
  only
  set fillchars=vert:\|,fold:-,stl:━,stlnc:═
  set statusline=a%=b
  call assert_match('^a\+━\+b$', s:get_statusline())
  vnew
  call assert_match('^a\+━\+b━a\+═\+b$', s:get_statusline())
  wincmd w
  call assert_match('^a\+═\+b═a\+━\+b$', s:get_statusline())
  set statusline& fillchars&
  %bw!
endfunc

" Used to write beyond allocated memory.  This assumes MAXPATHL is 4096 bytes.
func Test_statusline_verylong_filename()
  let fname = repeat('x', 4090)
  exe "new " .. fname
  set buftype=help
  set previewwindow
  redraw
  bwipe!
endfunc

func Test_statusline_highlight_truncate()
  CheckScreendump

  let lines =<< trim END
    set laststatus=2
    hi! link User1 Directory
    hi! link User2 ErrorMsg
    set statusline=%.5(%1*ABC%2*DEF%1*GHI%)
  END
  call writefile(lines, 'XTest_statusline', 'D')

  let buf = RunVimInTerminal('-S XTest_statusline', {'rows': 6})
  call VerifyScreenDump(buf, 'Test_statusline_hl', {})

  call StopVimInTerminal(buf)
endfunc

func Test_statusline_showcmd()
  CheckScreendump

  let lines =<< trim END
    func MyStatusLine()
      return '%S'
    endfunc

    set laststatus=2
    set statusline=%!MyStatusLine()
    set showcmdloc=statusline
    call setline(1, ['a', 'b', 'c'])
    set foldopen+=jump
    1,2fold
    3
  END
  call writefile(lines, 'XTest_statusline', 'D')

  let buf = RunVimInTerminal('-S XTest_statusline', {'rows': 6})

  call term_sendkeys(buf, "g")
  call VerifyScreenDump(buf, 'Test_statusline_showcmd_1', {})

  " typing "gg" should open the fold
  call term_sendkeys(buf, "g")
  call VerifyScreenDump(buf, 'Test_statusline_showcmd_2', {})

  call term_sendkeys(buf, "\<C-V>Gl")
  call VerifyScreenDump(buf, 'Test_statusline_showcmd_3', {})

  call term_sendkeys(buf, "\<Esc>1234")
  call VerifyScreenDump(buf, 'Test_statusline_showcmd_4', {})

  call term_sendkeys(buf, "\<Esc>:set statusline=\<CR>")
  call term_sendkeys(buf, ":\<CR>")
  call term_sendkeys(buf, "1234")
  call VerifyScreenDump(buf, 'Test_statusline_showcmd_5', {})

  call StopVimInTerminal(buf)
endfunc

func Test_statusline_highlight_group_cleared()
  CheckScreendump

  " the laststatus option is there to prevent
  " the code-style test from complaining about
  " trailing whitespace
  let lines =<< trim END
    set fillchars=stl:\ ,stlnc:\  laststatus=2
    split
    hi clear StatusLine
    hi clear StatusLineNC
  END
  call writefile(lines, 'XTest_statusline_stl', 'D')

  let buf = RunVimInTerminal('-S XTest_statusline_stl', {})

  call VerifyScreenDump(buf, 'Test_statusline_stl_1', {})

  call StopVimInTerminal(buf)
endfunc

" Test for setting both global and local 'statusline' values in a sandbox
func Test_statusline_in_sandbox()
  func SandboxStatusLine()
    call writefile(['after'], 'Xsandboxstatusline_write')
    return "status line"
  endfunc

  func Check_statusline_in_sandbox(set_cmd0, set_cmd1)
    only
    11new | 20vsplit
    call setline(1, 'foo')
    windo setlocal statusline=SomethingElse
    wincmd t
    setlocal statusline=
    call writefile(['before'], 'Xsandboxstatusline_write', 'D')

    exe 'sandbox' a:set_cmd0 'statusline=%!SandboxStatusLine()'
    call assert_equal('', &l:statusline)
    sandbox setlocal statusline=%!SandboxStatusLine()
    call assert_fails('redrawstatus', 'E48:')
    call assert_equal(['before'], readfile('Xsandboxstatusline_write'))
    wincmd b
    call assert_fails('redrawstatus!', 'E48:')
    call assert_equal(['before'], readfile('Xsandboxstatusline_write'))
    wincmd t

    5split
    call assert_fails('redrawstatus!', 'E48:')
    call assert_equal(['before'], readfile('Xsandboxstatusline_write'))
    close

    setlocal statusline=%!SandboxStatusLine() | redrawstatus
    call assert_equal('status line', Screenline(12))
    call assert_equal(['after'], readfile('Xsandboxstatusline_write'))

    call writefile(['before'], 'Xsandboxstatusline_write')
    setlocal statusline=
    call assert_fails('redrawstatus', 'E48:')
    call assert_equal(['before'], readfile('Xsandboxstatusline_write'))

    5split
    call assert_fails('redrawstatus!', 'E48:')
    call assert_equal(['before'], readfile('Xsandboxstatusline_write'))

    exe a:set_cmd1 'statusline=%!SandboxStatusLine()' | redrawstatus!
    call assert_equal('', &l:statusline)
    call assert_equal('status line', Screenline(6))
    call assert_equal('status line', Screenline(12))
    call assert_equal(['after'], readfile('Xsandboxstatusline_write'))
    bwipe!
  endfunc

  set noequalalways
  call Check_statusline_in_sandbox('setglobal', 'setglobal')
  call Check_statusline_in_sandbox('setglobal', 'set')
  call Check_statusline_in_sandbox('set', 'setglobal')
  call Check_statusline_in_sandbox('set', 'set')

  set equalalways& statusline&
  delfunc SandboxStatusLine
  delfunc Check_statusline_in_sandbox
endfunc

" This used to call memmove with a negative size and crash Vim
func Test_statusline_singlebyte_negative()
  let [_columns, _ls, _stl, _enc]  = [&columns, &ls, &stl, &enc]
  set encoding=latin1
  set laststatus=2 columns=15
  setl stl=%#ErrorMsg#abcdtàØ?}}o@`s`ÿæCú\xE%#Normal#
  vsp
  setl stl=%#ErrorMsg#abcdtàØ?}}o@`s`ÿæCú\xE%#Normal#
  redraw!
  redrawstatus
  bw!
  let [&columns, &ls, &stl, &enc] = [_columns, _ls, _stl, _enc]
endfunc

func g:StlClickTestFunc(info)
  let g:stl_click_info = a:info
  return 0
endfunc

func g:StlClickReturn1(info)
  let g:stl_click_info = a:info
  return 1
endfunc

func Test_statusline_click_handler()
  let save_mouse = &mouse
  let save_stl = &statusline
  let save_ls = &laststatus
  set mouse=a
  set laststatus=2

  " Basic click handler
  set statusline=%[StlClickTestFunc][Click]%[]\ %f
  redraw!

  " Click on the [Click] region
  let stl_row = win_screenpos(0)[0] + winheight(0)
  call test_setmouse(stl_row, 2)
  call feedkeys("\<LeftMouse>", 'xt')
  call feedkeys("\<LeftRelease>", 'xt')
  call assert_true(exists('g:stl_click_info'))
  call assert_equal('l', g:stl_click_info.button)
  call assert_equal(1, g:stl_click_info.nclicks)
  call assert_equal(0, g:stl_click_info.minwid)
  call assert_equal(win_getid(), g:stl_click_info.winid)
  call assert_equal('statusline', g:stl_click_info.area)
  unlet! g:stl_click_info

  " Click outside click region (on the filename part)
  call test_setmouse(stl_row, 20)
  call feedkeys("\<LeftMouse>", 'xt')
  call feedkeys("\<LeftRelease>", 'xt')
  call assert_false(exists('g:stl_click_info'))

  " Test with minwid
  set statusline=%42[StlClickTestFunc][Click]%[]\ %f
  redraw!
  call test_setmouse(stl_row, 2)
  call feedkeys("\<LeftMouse>", 'xt')
  call feedkeys("\<LeftRelease>", 'xt')
  call assert_true(exists('g:stl_click_info'))
  call assert_equal(42, g:stl_click_info.minwid)
  unlet! g:stl_click_info

  " Test middle click
  call test_setmouse(stl_row, 2)
  call feedkeys("\<MiddleMouse>", 'xt')
  call feedkeys("\<MiddleRelease>", 'xt')
  call assert_true(exists('g:stl_click_info'))
  call assert_equal('m', g:stl_click_info.button)
  unlet! g:stl_click_info
  let &mouse = save_mouse
  let &statusline = save_stl
  let &laststatus = save_ls
endfunc

func Test_statusline_click_multiple_regions()
  let save_mouse = &mouse
  let save_stl = &statusline
  let save_ls = &laststatus
  set mouse=a
  set laststatus=2

  " Two adjacent click regions with different minwid
  set statusline=%1[StlClickTestFunc][AAA]%[]%2[StlClickTestFunc][BBB]%[]
  redraw!

  let stl_row = win_screenpos(0)[0] + winheight(0)

  " Click on [AAA] region (col 2)
  call test_setmouse(stl_row, 2)
  call feedkeys("\<LeftMouse>", 'xt')
  call feedkeys("\<LeftRelease>", 'xt')
  call assert_true(exists('g:stl_click_info'))
  call assert_equal(1, g:stl_click_info.minwid)
  unlet! g:stl_click_info

  " Click on [BBB] region (col 7)
  call test_setmouse(stl_row, 7)
  call feedkeys("\<LeftMouse>", 'xt')
  call feedkeys("\<LeftRelease>", 'xt')
  call assert_true(exists('g:stl_click_info'))
  call assert_equal(2, g:stl_click_info.minwid)
  unlet! g:stl_click_info

  let &mouse = save_mouse
  let &statusline = save_stl
  let &laststatus = save_ls
endfunc

" Click on a region in any row of a multi-line statusline (issue #20116).
func Test_statusline_click_multiline()
  let save_mouse = &mouse
  let save_stl = &statusline
  let save_ls = &laststatus
  let save_stlo = &statuslineopt
  set mouse=a
  set laststatus=2

  " First row contains the click region, second row is filled with fillchar.
  set statusline=%[StlClickTestFunc][Click]%[]%@\ \ \ \
  set statuslineopt=maxheight:2,fixedheight
  redraw!

  let stl_row = win_screenpos(0)[0] + winheight(0)

  " Click on [Click] in the first row of the multi-line statusline.
  call test_setmouse(stl_row, 2)
  call feedkeys("\<LeftMouse>\<LeftRelease>", 'xt')
  call assert_true(exists('g:stl_click_info'))
  call assert_equal(0, g:stl_click_info.minwid)
  unlet! g:stl_click_info

  " A click region on the second row should also be recognized.
  set statusline=row1%@%2[StlClickTestFunc][Click2]%[]
  redraw!
  call test_setmouse(stl_row + 1, 2)
  call feedkeys("\<LeftMouse>\<LeftRelease>", 'xt')
  call assert_true(exists('g:stl_click_info'))
  call assert_equal(2, g:stl_click_info.minwid)
  unlet! g:stl_click_info

  let &mouse = save_mouse
  let &statusline = save_stl
  let &laststatus = save_ls
  let &statuslineopt = save_stlo
endfunc

func Test_statusline_click_region_extends_to_end()
  let save_mouse = &mouse
  let save_stl = &statusline
  let save_ls = &laststatus
  set mouse=a
  set laststatus=2

  " Click region without %[] extends to end of statusline
  set statusline=xxx%[StlClickTestFunc]Clickable
  redraw!

  let stl_row = win_screenpos(0)[0] + winheight(0)

  " Click near the end of the statusline
  call test_setmouse(stl_row, 15)
  call feedkeys("\<LeftMouse>", 'xt')
  call feedkeys("\<LeftRelease>", 'xt')
  call assert_true(exists('g:stl_click_info'))
  unlet! g:stl_click_info

  " Click on "xxx" (before the click region)
  call test_setmouse(stl_row, 1)
  call feedkeys("\<LeftMouse>", 'xt')
  call feedkeys("\<LeftRelease>", 'xt')
  call assert_false(exists('g:stl_click_info'))

  let &mouse = save_mouse
  let &statusline = save_stl
  let &laststatus = save_ls
endfunc

func Test_statusline_click_option_validation()
  " Valid formats should not produce errors
  let save_stl = &statusline
  set statusline=%[Func]text%[]
  set statusline=%3[Func]text%[]
  set statusline=%[Func]text
  set statusline=%[Func_Name]text%[]
  " %@ alone is still valid (line break)
  set statusline=%@
  let &statusline = save_stl
endfunc

func Test_statusline_click_linebreak_still_works()
  " Ensure %@ without FuncName still works as line break
  let save_stl = &statusline
  let save_ls = &laststatus
  set laststatus=2

  " This should not error - %@ is line break
  set statusline=line1%@line2
  redraw!

  let &statusline = save_stl
  let &laststatus = save_ls
endfunc

func Test_tabline_click_handler()
  let save_mouse = &mouse
  let save_tal = &tabline
  let save_stal = &showtabline
  if has('gui')
    let save_go = &guioptions
    set guioptions-=e
  endif
  set mouse=a
  set showtabline=2

  " Two adjacent click regions in 'tabline' with different minwid.
  set tabline=%1[StlClickTestFunc][AAA]%[]%2[StlClickTestFunc][BBB]%[]
  redraw!

  " Click on [AAA] region (tabline is row 1).
  call test_setmouse(1, 2)
  call feedkeys("\<LeftMouse>\<LeftRelease>", 'xt')
  call assert_true(exists('g:stl_click_info'))
  call assert_equal('l', g:stl_click_info.button)
  call assert_equal(1, g:stl_click_info.nclicks)
  call assert_equal(1, g:stl_click_info.minwid)
  " winid is 0 for tabline clicks (no associated window).
  call assert_equal(0, g:stl_click_info.winid)
  call assert_equal('tabline', g:stl_click_info.area)
  unlet! g:stl_click_info

  " Click on [BBB] region.
  call test_setmouse(1, 7)
  call feedkeys("\<LeftMouse>\<LeftRelease>", 'xt')
  call assert_true(exists('g:stl_click_info'))
  call assert_equal(2, g:stl_click_info.minwid)
  unlet! g:stl_click_info

  " Middle click on [AAA].
  call test_setmouse(1, 2)
  call feedkeys("\<MiddleMouse>\<MiddleRelease>", 'xt')
  call assert_true(exists('g:stl_click_info'))
  call assert_equal('m', g:stl_click_info.button)
  unlet! g:stl_click_info

  " Click outside any %[...] region: no callback, no error.
  set tabline=xxx%1[StlClickTestFunc][YYY]%[]
  redraw!
  call test_setmouse(1, 1)
  call feedkeys("\<LeftMouse>\<LeftRelease>", 'xt')
  call assert_false(exists('g:stl_click_info'))

  let &mouse = save_mouse
  let &tabline = save_tal
  let &showtabline = save_stal
  if has('gui')
    let &guioptions = save_go
  endif
endfunc

func Test_statusline_empty()
  set laststatus=2 statusline=%!'%{}%'
  try
  redraw!
  catch
  endtry
  set laststatus&
  set statusline&
endfunc

func Test_statusline_vsep_borrow_hl()
  CheckScreendump

  " borrow_stl_vsep_hl(): vsep cells adjacent to a status line should
  " borrow the highlight of the neighbouring window's status line edge so
  " that custom highlights flow into the separator column.
  "  - vsep next to curwin: curwin's edge hl is borrowed.
  "  - vsep between two non-current windows: the left window's right-edge
  "    hl is borrowed when the status fillchar is a space.
  let lines =<< trim END
    hi User1 ctermfg=Red ctermbg=Yellow
    hi User2 ctermfg=Blue ctermbg=Green
    set laststatus=2
    set statusline=%1*L%=%2*R
    vsplit
    vsplit
    vsplit
    " curwin is now the leftmost window; move to the second one so the
    " layout becomes: NC | cur | NC | NC.
    2wincmd w
  END
  call writefile(lines, 'XTest_statusline_vsep_borrow_hl', 'D')

  let buf = RunVimInTerminal('-S XTest_statusline_vsep_borrow_hl',
        \ {'rows': 6, 'cols': 78})
  call term_sendkeys(buf, "\<C-L>")
  call VerifyScreenDump(buf, 'Test_statusline_vsep_borrow_hl_01', {})

  " Move curwin to the third window: NC | NC | cur | NC.
  " Now the leftmost vsep is between two non-current windows.
  call term_sendkeys(buf, "\<C-w>l\<C-L>")
  call VerifyScreenDump(buf, 'Test_statusline_vsep_borrow_hl_02', {})

  call StopVimInTerminal(buf)
endfunc

" vim: shiftwidth=2 sts=2 expandtab
