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" Vim indent file
" Language: Vim script
" Maintainer: Bram Moolenaar <Bram@vim.org>
" Last Change: 2021 Jan 21
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
setlocal indentexpr=GetVimIndent()
setlocal indentkeys+==end,=},=else,=cat,=finall,=END,0\\,0=\"\\\
setlocal indentkeys-=0#
let b:undo_indent = "setl indentkeys< indentexpr<"
" Only define the function once.
if exists("*GetVimIndent")
finish
endif
let s:keepcpo= &cpo
set cpo&vim
function GetVimIndent()
let ignorecase_save = &ignorecase
try
let &ignorecase = 0
return GetVimIndentIntern()
finally
let &ignorecase = ignorecase_save
endtry
endfunc
let s:lineContPat = '^\s*\(\\\|"\\ \)'
function GetVimIndentIntern()
" Find a non-blank line above the current line.
let lnum = prevnonblank(v:lnum - 1)
" The previous line, ignoring line continuation
let prev_text_end = lnum > 0 ? getline(lnum) : ''
" If the current line doesn't start with '\' or '"\ ' and below a line that
" starts with '\' or '"\ ', use the indent of the line above it.
let cur_text = getline(v:lnum)
if cur_text !~ s:lineContPat
while lnum > 0 && getline(lnum) =~ s:lineContPat
let lnum = lnum - 1
endwhile
endif
" At the start of the file use zero indent.
if lnum == 0
return 0
endif
" the start of the previous line, skipping over line continuation
let prev_text = getline(lnum)
let found_cont = 0
" Add a 'shiftwidth' after :if, :while, :try, :catch, :finally, :function
" and :else. Add it three times for a line that starts with '\' or '"\ '
" after a line that doesn't (or g:vim_indent_cont if it exists).
let ind = indent(lnum)
" In heredoc indenting works completely differently.
if has('syntax_items')
let syn_here = synIDattr(synID(v:lnum, 1, 1), "name")
if syn_here =~ 'vimLetHereDocStop'
" End of heredoc: use indent of matching start line
let lnum = v:lnum - 1
while lnum > 0
if synIDattr(synID(lnum, 1, 1), "name") !~ 'vimLetHereDoc'
return indent(lnum)
endif
let lnum -= 1
endwhile
return 0
endif
if syn_here =~ 'vimLetHereDoc'
if synIDattr(synID(lnum, 1, 1), "name") !~ 'vimLetHereDoc'
" First line in heredoc: increase indent
return ind + shiftwidth()
endif
" Heredoc continues: no change in indent
return ind
endif
endif
if cur_text =~ s:lineContPat && v:lnum > 1 && prev_text !~ s:lineContPat
let found_cont = 1
if exists("g:vim_indent_cont")
let ind = ind + g:vim_indent_cont
else
let ind = ind + shiftwidth() * 3
endif
elseif prev_text =~ '^\s*aug\%[roup]\s\+' && prev_text !~ '^\s*aug\%[roup]\s\+[eE][nN][dD]\>'
let ind = ind + shiftwidth()
else
" A line starting with :au does not increment/decrement indent.
if prev_text !~ '^\s*au\%[tocmd]'
let i = match(prev_text, '\(^\||\)\s*\(export\s\+\)\?\({\|\(if\|wh\%[ile]\|for\|try\|cat\%[ch]\|fina\|finall\%[y]\|fu\%[nction]\|def\|el\%[seif]\)\>\)')
if i >= 0
let ind += shiftwidth()
if strpart(prev_text, i, 1) == '|' && has('syntax_items')
\ && synIDattr(synID(lnum, i, 1), "name") =~ '\(Comment\|String\)$'
let ind -= shiftwidth()
endif
endif
endif
endif
" If the previous line contains an "end" after a pipe, but not in an ":au"
" command. And not when there is a backslash before the pipe.
" And when syntax HL is enabled avoid a match inside a string.
let i = match(prev_text, '[^\\]|\s*\(ene\@!\)')
if i > 0 && prev_text !~ '^\s*au\%[tocmd]'
if !has('syntax_items') || synIDattr(synID(lnum, i + 2, 1), "name") !~ '\(Comment\|String\)$'
let ind = ind - shiftwidth()
endif
endif
" For a line starting with "}" find the matching "{". If it is at the start
" of the line align with it, probably end of a block.
" Use the mapped "%" from matchit to find the match, otherwise we may match
" a { inside a comment or string.
if cur_text =~ '^\s*}'
if maparg('%') != ''
exe v:lnum
silent! normal %
if line('.') < v:lnum && getline('.') =~ '^\s*{'
let ind = indent('.')
endif
else
" todo: use searchpair() to find a match
endif
endif
" Below a line starting with "}" find the matching "{". If it is at the
" end of the line we must be below the end of a dictionary.
if prev_text =~ '^\s*}'
if maparg('%') != ''
exe lnum
silent! normal %
if line('.') == lnum || getline('.') !~ '^\s*{'
let ind = ind - shiftwidth()
endif
else
" todo: use searchpair() to find a match
endif
endif
" Below a line starting with "]" we must be below the end of a list.
if prev_text_end =~ '^\s*]'
let ind = ind - shiftwidth()
endif
" A line ending in "{"/"[} is most likely the start of a dict/list literal,
" indent the next line more. Not for a continuation line.
if prev_text_end =~ '[{[]\s*$' && !found_cont
let ind = ind + shiftwidth()
endif
" Subtract a 'shiftwidth' on a :endif, :endwhile, :catch, :finally, :endtry,
" :endfun, :enddef, :else and :augroup END.
if cur_text =~ '^\s*\(ene\@!\|cat\|finall\|el\|aug\%[roup]\s\+[eE][nN][dD]\)'
let ind = ind - shiftwidth()
endif
return ind
endfunction
let &cpo = s:keepcpo
unlet s:keepcpo
" vim:sw=2
|
