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1 " Vim indent file
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2 " Language: SDL
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3 " Maintainer: Michael Piefel <piefel@informatik.hu-berlin.de>
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4 " Last Change: 2001 Sep 17
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5
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6 " Shamelessly stolen from the Vim-Script indent file
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7
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8 " Only load this indent file when no other was loaded.
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9 if exists("b:did_indent")
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10 finish
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11 endif
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12 let b:did_indent = 1
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13
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14 setlocal indentexpr=GetSDLIndent()
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15 setlocal indentkeys+==~end,=~state,*<Return>
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16
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17 " Only define the function once.
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18 if exists("*GetSDLIndent")
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19 " finish
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20 endif
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21
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22 set cpo-=C
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23
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24 function! GetSDLIndent()
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25 " Find a non-blank line above the current line.
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26 let lnum = prevnonblank(v:lnum - 1)
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27
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28 " At the start of the file use zero indent.
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29 if lnum == 0
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30 return 0
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31 endif
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32
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33 let ind = indent(lnum)
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34 let virtuality = '^\s*\(\(virtual\|redefined\|finalized\)\s\+\)\=\s*'
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35
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36 " Add a single space to comments which use asterisks
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37 if getline(lnum) =~ '^\s*\*'
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38 let ind = ind - 1
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39 endif
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40 if getline(v:lnum) =~ '^\s*\*'
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41 let ind = ind + 1
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42 endif
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43
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44 " Add a 'shiftwidth' after states, different blocks, decision (and alternatives), inputs
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45 if (getline(lnum) =~? '^\s*\(start\|state\|system\|package\|connection\|channel\|alternative\|macro\|operator\|newtype\|select\|substructure\|decision\|generator\|refinement\|service\|method\|exceptionhandler\|asntype\|syntype\|value\|(.*):\|\(priority\s\+\)\=input\|provided\)'
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46 \ || getline(lnum) =~? virtuality . '\(process\|procedure\|block\|object\)')
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47 \ && getline(lnum) !~? 'end[[:alpha:]]\+;$'
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48 let ind = ind + &sw
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49 endif
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50
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51 " Subtract a 'shiftwidth' after states
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52 if getline(lnum) =~? '^\s*\(stop\|return\>\|nextstate\)'
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53 let ind = ind - &sw
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54 endif
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55
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56 " Subtract a 'shiftwidth' on on end (uncompleted line)
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57 if getline(v:lnum) =~? '^\s*end\>'
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58 let ind = ind - &sw
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59 endif
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60
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61 " Put each alternatives where the corresponding decision was
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62 if getline(v:lnum) =~? '^\s*\((.*)\|else\):'
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63 normal k
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64 let ind = indent(searchpair('^\s*decision', '', '^\s*enddecision', 'bW',
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65 \ 'synIDattr(synID(line("."), col("."), 0), "name") =~? "sdlString"'))
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66 endif
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67
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68 " Put each state where the preceding state was
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69 if getline(v:lnum) =~? '^\s*state\>'
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70 let ind = indent(search('^\s*start', 'bW'))
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71 endif
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72
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73 " Systems and packages are always in column 0
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74 if getline(v:lnum) =~? '^\s*\(\(end\)\=system\|\(end\)\=package\)'
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75 return 0;
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76 endif
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77
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78 " Put each end* where the corresponding begin was
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79 if getline(v:lnum) =~? '^\s*end[[:alpha:]]'
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80 normal k
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81 let partner=matchstr(getline(v:lnum), '\(' . virtuality . 'end\)\@<=[[:alpha:]]\+')
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82 let ind = indent(searchpair(virtuality . partner, '', '^\s*end' . partner, 'bW',
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83 \ 'synIDattr(synID(line("."), col("."), 0), "name") =~? "sdlString"'))
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84 endif
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85
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86 return ind
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87 endfunction
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88
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89 " vim:sw=2
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