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| 1 | +" Vim indent file |
| 2 | +" Language: Idris 2 |
| 3 | +" Maintainer: Idris Hackers (https://github.com/edwinb/idris2-vim), Serhii Khoma <srghma@gmail.com> |
| 4 | +" Author: raichoo <raichoo@googlemail.com> |
| 5 | +" Last Change: 2024 Nov 05 |
| 6 | +" License: Vim (see :h license) |
| 7 | +" Repository: https://github.com/ShinKage/idris2-nvim |
| 8 | +" |
| 9 | +" indentation for idris (idris-lang.org) |
| 10 | +" |
| 11 | +" Based on haskell indentation by motemen <motemen@gmail.com> |
| 12 | +" |
| 13 | +" Indentation configuration variables: |
| 14 | +" |
| 15 | +" g:idris2_indent_if (default: 3) |
| 16 | +" Controls indentation after 'if' statements |
| 17 | +" Example: |
| 18 | +" if condition |
| 19 | +" >>>then expr |
| 20 | +" >>>else expr |
| 21 | +" |
| 22 | +" g:idris2_indent_case (default: 5) |
| 23 | +" Controls indentation of case expressions |
| 24 | +" Example: |
| 25 | +" case x of |
| 26 | +" >>>>>Left y => ... |
| 27 | +" >>>>>Right z => ... |
| 28 | +" |
| 29 | +" g:idris2_indent_let (default: 4) |
| 30 | +" Controls indentation after 'let' bindings |
| 31 | +" Example: |
| 32 | +" let x = expr in |
| 33 | +" >>>>body |
| 34 | +" |
| 35 | +" g:idris2_indent_rewrite (default: 8) |
| 36 | +" Controls indentation after 'rewrite' expressions |
| 37 | +" Example: |
| 38 | +" rewrite proof in |
| 39 | +" >>>>>>>>expr |
| 40 | +" |
| 41 | +" g:idris2_indent_where (default: 6) |
| 42 | +" Controls indentation of 'where' blocks |
| 43 | +" Example: |
| 44 | +" function args |
| 45 | +" >>>>>>where helper = expr |
| 46 | +" |
| 47 | +" g:idris2_indent_do (default: 3) |
| 48 | +" Controls indentation in 'do' blocks |
| 49 | +" Example: |
| 50 | +" do x <- action |
| 51 | +" >>>y <- action |
| 52 | +" |
| 53 | +" Example configuration in .vimrc: |
| 54 | +" let g:idris2_indent_if = 2 |
| 55 | + |
| 56 | +if exists('b:did_indent') |
| 57 | + finish |
| 58 | +endif |
| 59 | + |
| 60 | +setlocal indentexpr=GetIdrisIndent() |
| 61 | +setlocal indentkeys=!^F,o,O,} |
| 62 | + |
| 63 | +let b:did_indent = 1 |
| 64 | +let b:undo_indent = "setlocal indentexpr< indentkeys<" |
| 65 | + |
| 66 | +" we want to use line continuations (\) BEGINNING |
| 67 | +let s:cpo_save = &cpo |
| 68 | +set cpo&vim |
| 69 | + |
| 70 | +" Define defaults for indent configuration |
| 71 | +let s:indent_defaults = { |
| 72 | + \ 'idris2_indent_if': 3, |
| 73 | + \ 'idris2_indent_case': 5, |
| 74 | + \ 'idris2_indent_let': 4, |
| 75 | + \ 'idris2_indent_rewrite': 8, |
| 76 | + \ 'idris2_indent_where': 6, |
| 77 | + \ 'idris2_indent_do': 3 |
| 78 | + \ } |
| 79 | + |
| 80 | +" we want to use line continuations (\) END |
| 81 | +let &cpo = s:cpo_save |
| 82 | +unlet s:cpo_save |
| 83 | + |
| 84 | +" Set up indent settings with user overrides |
| 85 | +for [key, default] in items(s:indent_defaults) |
| 86 | + let varname = 'g:' . key |
| 87 | + if !exists(varname) |
| 88 | + execute 'let' varname '=' default |
| 89 | + endif |
| 90 | +endfor |
| 91 | + |
| 92 | +if exists("*GetIdrisIndent") |
| 93 | + finish |
| 94 | +endif |
| 95 | + |
| 96 | +function! GetIdrisIndent() |
| 97 | + let prevline = getline(v:lnum - 1) |
| 98 | + |
| 99 | + if prevline =~ '\s\+(\s*.\+\s\+:\s\+.\+\s*)\s\+->\s*$' |
| 100 | + return match(prevline, '(') |
| 101 | + elseif prevline =~ '\s\+{\s*.\+\s\+:\s\+.\+\s*}\s\+->\s*$' |
| 102 | + return match(prevline, '{') |
| 103 | + endif |
| 104 | + |
| 105 | + if prevline =~ '[!#$%&*+./<>?@\\^|~-]\s*$' |
| 106 | + let s = match(prevline, '[:=]') |
| 107 | + if s > 0 |
| 108 | + return s + 2 |
| 109 | + else |
| 110 | + return match(prevline, '\S') |
| 111 | + endif |
| 112 | + endif |
| 113 | + |
| 114 | + if prevline =~ '[{([][^})\]]\+$' |
| 115 | + return match(prevline, '[{([]') |
| 116 | + endif |
| 117 | + |
| 118 | + if prevline =~ '\<let\>\s\+.\+\<in\>\s*$' |
| 119 | + return match(prevline, '\<let\>') + g:idris2_indent_let |
| 120 | + endif |
| 121 | + |
| 122 | + if prevline =~ '\<rewrite\>\s\+.\+\<in\>\s*$' |
| 123 | + return match(prevline, '\<rewrite\>') + g:idris2_indent_rewrite |
| 124 | + endif |
| 125 | + |
| 126 | + if prevline !~ '\<else\>' |
| 127 | + let s = match(prevline, '\<if\>.*\&.*\zs\<then\>') |
| 128 | + if s > 0 |
| 129 | + return s |
| 130 | + endif |
| 131 | + |
| 132 | + let s = match(prevline, '\<if\>') |
| 133 | + if s > 0 |
| 134 | + return s + g:idris2_indent_if |
| 135 | + endif |
| 136 | + endif |
| 137 | + |
| 138 | + if prevline =~ '\(\<where\>\|\<do\>\|=\|[{([]\)\s*$' |
| 139 | + return match(prevline, '\S') + &shiftwidth |
| 140 | + endif |
| 141 | + |
| 142 | + if prevline =~ '\<where\>\s\+\S\+.*$' |
| 143 | + return match(prevline, '\<where\>') + g:idris2_indent_where |
| 144 | + endif |
| 145 | + |
| 146 | + if prevline =~ '\<do\>\s\+\S\+.*$' |
| 147 | + return match(prevline, '\<do\>') + g:idris2_indent_do |
| 148 | + endif |
| 149 | + |
| 150 | + if prevline =~ '^\s*\<\(co\)\?data\>\s\+[^=]\+\s\+=\s\+\S\+.*$' |
| 151 | + return match(prevline, '=') |
| 152 | + endif |
| 153 | + |
| 154 | + if prevline =~ '\<with\>\s\+([^)]*)\s*$' |
| 155 | + return match(prevline, '\S') + &shiftwidth |
| 156 | + endif |
| 157 | + |
| 158 | + if prevline =~ '\<case\>\s\+.\+\<of\>\s*$' |
| 159 | + return match(prevline, '\<case\>') + g:idris2_indent_case |
| 160 | + endif |
| 161 | + |
| 162 | + if prevline =~ '^\s*\(\<namespace\>\|\<\(co\)\?data\>\)\s\+\S\+\s*$' |
| 163 | + return match(prevline, '\(\<namespace\>\|\<\(co\)\?data\>\)') + &shiftwidth |
| 164 | + endif |
| 165 | + |
| 166 | + if prevline =~ '^\s*\(\<using\>\|\<parameters\>\)\s*([^(]*)\s*$' |
| 167 | + return match(prevline, '\(\<using\>\|\<parameters\>\)') + &shiftwidth |
| 168 | + endif |
| 169 | + |
| 170 | + if prevline =~ '^\s*\<mutual\>\s*$' |
| 171 | + return match(prevline, '\<mutual\>') + &shiftwidth |
| 172 | + endif |
| 173 | + |
| 174 | + let line = getline(v:lnum) |
| 175 | + |
| 176 | + if (line =~ '^\s*}\s*' && prevline !~ '^\s*;') |
| 177 | + return match(prevline, '\S') - &shiftwidth |
| 178 | + endif |
| 179 | + |
| 180 | + return match(prevline, '\S') |
| 181 | +endfunction |
| 182 | + |
| 183 | +" vim:et:sw=2:sts=2 |
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