elm.vim (3277B)
1 " Elm indent plugin file 2 " Language: Elm 3 " Maintainer: Andreas Scharf <as@99n.de> 4 " Original Author: Joseph Hager <ajhager@gmail.com> 5 " Copyright: Joseph Hager <ajhager@gmail.com> 6 " License: BSD3 7 " Latest Revision: 2021-09-29 8 9 " Only load this indent file when no other was loaded. 10 if exists('b:did_indent') 11 finish 12 endif 13 let b:did_indent = 1 14 15 " Local defaults 16 setlocal expandtab 17 setlocal indentexpr=GetElmIndent() 18 setlocal indentkeys+=0=else,0=if,0=of,0=import,0=then,0=type,0\|,0},0\],0),=-},0=in 19 setlocal nolisp 20 setlocal nosmartindent 21 22 let b:undo_indent = "setl et< inde< indk< lisp< si<" 23 24 " Only define the function once. 25 if exists('*GetElmIndent') 26 finish 27 endif 28 29 " Indent pairs 30 function! s:FindPair(pstart, pmid, pend) 31 "call search(a:pend, 'bW') 32 return indent(searchpair(a:pstart, a:pmid, a:pend, 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"')) 33 endfunction 34 35 function! GetElmIndent() 36 let l:lnum = v:lnum - 1 37 38 " Ident 0 if the first line of the file: 39 if l:lnum == 0 40 return 0 41 endif 42 43 let l:ind = indent(l:lnum) 44 let l:lline = getline(l:lnum) 45 let l:line = getline(v:lnum) 46 47 " Indent if current line begins with '}': 48 if l:line =~? '^\s*}' 49 return s:FindPair('{', '', '}') 50 51 " Indent if current line begins with 'else': 52 elseif l:line =~# '^\s*else\>' 53 if l:lline !~# '^\s*\(if\|then\)\>' 54 return s:FindPair('\<if\>', '', '\<else\>') 55 endif 56 57 " Indent if current line begins with 'then': 58 elseif l:line =~# '^\s*then\>' 59 if l:lline !~# '^\s*\(if\|else\)\>' 60 return s:FindPair('\<if\>', '', '\<then\>') 61 endif 62 63 " HACK: Indent lines in case with nearest case clause: 64 elseif l:line =~# '->' && l:line !~# ':' && l:line !~# '\\' 65 return indent(search('^\s*case', 'bWn')) + &shiftwidth 66 67 " HACK: Don't change the indentation if the last line is a comment. 68 elseif l:lline =~# '^\s*--' 69 return l:ind 70 71 " Align the end of block comments with the start 72 elseif l:line =~# '^\s*-}' 73 return indent(search('{-', 'bWn')) 74 75 " Indent double shift after let with an empty rhs 76 elseif l:lline =~# '\<let\>.*\s=$' 77 return l:ind + 4 + &shiftwidth 78 79 " Align 'in' with the parent let. 80 elseif l:line =~# '^\s*in\>' 81 return indent(search('^\s*let', 'bWn')) 82 83 " Align bindings with the parent let. 84 elseif l:lline =~# '\<let\>' 85 return l:ind + 4 86 87 " Align bindings with the parent in. 88 elseif l:lline =~# '^\s*in\>' 89 return l:ind 90 91 endif 92 93 " Add a 'shiftwidth' after lines ending with: 94 if l:lline =~# '\(|\|=\|->\|<-\|(\|\[\|{\|\<\(of\|else\|if\|then\)\)\s*$' 95 let l:ind = l:ind + &shiftwidth 96 97 " Add a 'shiftwidth' after lines starting with type ending with '=': 98 elseif l:lline =~# '^\s*type' && l:line =~# '^\s*=' 99 let l:ind = l:ind + &shiftwidth 100 101 " Back to normal indent after comments: 102 elseif l:lline =~# '-}\s*$' 103 call search('-}', 'bW') 104 let l:ind = indent(searchpair('{-', '', '-}', 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string"')) 105 106 " Ident some operators if there aren't any starting the last line. 107 elseif l:line =~# '^\s*\(!\|&\|(\|`\|+\||\|{\|[\|,\)=' && l:lline !~# '^\s*\(!\|&\|(\|`\|+\||\|{\|[\|,\)=' && l:lline !~# '^\s*$' 108 let l:ind = l:ind + &shiftwidth 109 110 elseif l:lline ==# '' && getline(l:lnum - 1) !=# '' 111 let l:ind = indent(search('^\s*\S+', 'bWn')) 112 113 endif 114 115 return l:ind 116 endfunc