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Diffstat (limited to '')
| -rw-r--r-- | runtime/indent/vim.vim | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/runtime/indent/vim.vim b/runtime/indent/vim.vim new file mode 100644 index 0000000..b031d1f --- /dev/null +++ b/runtime/indent/vim.vim @@ -0,0 +1,177 @@ +" 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 |