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32004
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1 " Vim indent file
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2 " Language: fish
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3 " Maintainer: Nicholas Boyle (github.com/nickeb96)
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4 " Repository: https://github.com/nickeb96/fish.vim
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5 " Last Change: February 4, 2023
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6
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7 if exists("b:did_indent")
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8 finish
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9 endif
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10 let b:did_indent = 1
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11
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12 setlocal indentexpr=GetFishIndent(v:lnum)
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13 setlocal indentkeys+==end,=else,=case
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14
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15 function s:PrevCmdStart(linenum)
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16 let l:linenum = a:linenum
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17 " look for the first line that isn't a line continuation
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18 while l:linenum > 1 && getline(l:linenum - 1) =~# '\\$'
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19 let l:linenum = l:linenum - 1
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20 endwhile
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21 return l:linenum
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22 endfunction
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23
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24 function GetFishIndent(lnum)
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25 let l:shiftwidth = shiftwidth()
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26
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27 let l:prevlnum = prevnonblank(a:lnum - 1)
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28 if l:prevlnum ==# 0
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29 return 0
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30 endif
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31
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32 " if the previous line ended with a line continuation
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33 if getline(a:lnum - 1) =~# '\\$'
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34 if a:lnum ==# 0 || getline(a:lnum - 2) !~# '\\$'
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35 " this is the first line continuation in a chain, so indent it
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36 return indent(a:lnum - 1) + l:shiftwidth
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37 else
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38 " use the same indentation as the previous continued line
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39 return indent(a:lnum - 1)
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40 endif
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41 endif
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42
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43 let l:prevlnum = s:PrevCmdStart(l:prevlnum)
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44
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45 let l:prevline = getline(l:prevlnum)
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46 if l:prevline =~# '^\s*\(begin\|if\|else\|while\|for\|function\|case\|switch\)\>'
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47 let l:indent = l:shiftwidth
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48 else
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49 let l:indent = 0
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50 endif
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51
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52 let l:line = getline(a:lnum)
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53 if l:line =~# '^\s*end\>'
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54 " find end's matching start
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55 let l:depth = 1
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56 let l:currentlnum = a:lnum
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57 while l:depth > 0 && l:currentlnum > 0
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58 let l:currentlnum = s:PrevCmdStart(prevnonblank(l:currentlnum - 1))
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59 let l:currentline = getline(l:currentlnum)
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60 if l:currentline =~# '^\s*end\>'
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61 let l:depth = l:depth + 1
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62 elseif l:currentline =~# '^\s*\(begin\|if\|while\|for\|function\|switch\)\>'
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63 let l:depth = l:depth - 1
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64 endif
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65 endwhile
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66 if l:currentline =~# '^\s*switch\>'
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67 return indent(l:currentlnum)
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68 else
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69 return indent(l:prevlnum) + l:indent - l:shiftwidth
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70 endif
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71 elseif l:line =~# '^\s*else\>'
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72 return indent(l:prevlnum) + l:indent - l:shiftwidth
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73 elseif l:line =~# '^\s*case\>'
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74 if getline(l:prevlnum) =~# '^\s*switch\>'
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75 return indent(l:prevlnum) + l:indent
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76 else
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77 return indent(l:prevlnum) + l:indent - l:shiftwidth
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78 endif
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79 else
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80 return indent(l:prevlnum) + l:indent
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81 endif
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82 endfunction
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