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1 " Description: InstallShield indenter
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2 " Author: Johannes Zellner <johannes@zellner.org>
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3 " Last Change: Tue, 27 Apr 2004 14:54:59 CEST
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4
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5 " Only load this indent file when no other was loaded.
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6 if exists("b:did_indent")
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7 finish
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8 endif
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9 let b:did_indent = 1
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10
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11 setlocal autoindent
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12 setlocal indentexpr=GetIshdIndent(v:lnum)
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13 setlocal indentkeys&
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14 setlocal indentkeys+==else,=elseif,=endif,=end,=begin,<:>
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15 " setlocal indentkeys-=0#
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16
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17 let b:undo_indent = "setl ai< indentexpr< indentkeys<"
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18
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19 " Only define the function once.
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20 if exists("*GetIshdIndent")
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21 finish
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22 endif
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23
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24 fun! GetIshdIndent(lnum)
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25 " labels and preprocessor get zero indent immediately
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26 let this_line = getline(a:lnum)
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27 let LABELS_OR_PREPROC = '^\s*\(\<\k\+\>:\s*$\|#.*\)'
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28 let LABELS_OR_PREPROC_EXCEPT = '^\s*\<default\+\>:'
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29 if this_line =~ LABELS_OR_PREPROC && this_line !~ LABELS_OR_PREPROC_EXCEPT
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30 return 0
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31 endif
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32
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33 " Find a non-blank line above the current line.
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34 " Skip over labels and preprocessor directives.
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35 let lnum = a:lnum
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36 while lnum > 0
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37 let lnum = prevnonblank(lnum - 1)
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38 let previous_line = getline(lnum)
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39 if previous_line !~ LABELS_OR_PREPROC || previous_line =~ LABELS_OR_PREPROC_EXCEPT
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40 break
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41 endif
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42 endwhile
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43
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44 " Hit the start of the file, use zero indent.
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45 if lnum == 0
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46 return 0
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47 endif
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48
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49 let ind = indent(lnum)
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50
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51 " Add
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52 if previous_line =~ '^\s*\<\(function\|begin\|switch\|case\|default\|if.\{-}then\|else\|elseif\|while\|repeat\)\>'
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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
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57 if this_line =~ '^\s*\<endswitch\>'
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58 let ind = ind - 2 * &sw
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59 elseif this_line =~ '^\s*\<\(begin\|end\|endif\|endwhile\|else\|elseif\|until\)\>'
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60 let ind = ind - &sw
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61 elseif this_line =~ '^\s*\<\(case\|default\)\>'
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62 if previous_line !~ '^\s*\<switch\>'
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63 let ind = ind - &sw
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64 endif
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65 endif
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66
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67 return ind
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68 endfun
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