| Bram Moolenaar | 520470a | 2005-06-16 21:59:56 +0000 | [diff] [blame] | 1 | " Vim indent file
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| 2 | " Language: Pascal
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| 3 | " Maintainer: Neil Carter <n.carter@swansea.ac.uk>
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| 4 | " Created: 2004 Jul 13
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| 5 | " Last Change: 2005 Jun 15
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| 6 |
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| 7 |
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| 8 | if exists("b:did_indent")
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| 9 | finish
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| 10 | endif
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| 11 | let b:did_indent = 1
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| 12 |
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| 13 | setlocal indentexpr=GetPascalIndent(v:lnum)
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| 14 | setlocal indentkeys&
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| 15 | setlocal indentkeys+==end;,==const,==type,==var,==begin,==repeat,==until,==for
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| 16 | setlocal indentkeys+==program,==function,==procedure,==object,==private
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| 17 | setlocal indentkeys+==record,==if,==else,==case
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| 18 |
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| 19 | if exists("*GetPascalIndent")
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| 20 | finish
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| 21 | endif
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| 22 |
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| 23 |
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| 24 | function! s:GetPrevNonCommentLineNum( line_num )
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| 25 |
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| 26 | " Skip lines starting with a comment
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| 27 | let SKIP_LINES = '^\s*\(\((\*\)\|\(\*\ \)\|\(\*)\)\|{\|}\)'
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| 28 |
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| 29 | let nline = a:line_num
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| 30 | while nline > 0
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| 31 | let nline = prevnonblank(nline-1)
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| 32 | if getline(nline) !~? SKIP_LINES
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| 33 | break
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| 34 | endif
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| 35 | endwhile
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| 36 |
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| 37 | return nline
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| 38 | endfunction
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| 39 |
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| 40 |
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| 41 | function! GetPascalIndent( line_num )
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| 42 | " Line 0 always goes at column 0
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| 43 | if a:line_num == 0
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| 44 | return 0
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| 45 | endif
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| 46 |
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| 47 | let this_codeline = getline( a:line_num )
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| 48 |
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| 49 | " If in the middle of a three-part comment
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| 50 | if this_codeline =~ '^\s*\*'
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| 51 | return indent( a:line_num )
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| 52 | endif
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| 53 |
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| 54 | let prev_codeline_num = s:GetPrevNonCommentLineNum( a:line_num )
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| 55 | let prev_codeline = getline( prev_codeline_num )
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| 56 | let indnt = indent( prev_codeline_num )
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| 57 |
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| 58 | " Compiler directives should always go in column zero.
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| 59 | if this_codeline =~ '^\s*{\(\$IFDEF\|\$ELSE\|\$ENDIF\)'
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| 60 | return 0
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| 61 | endif
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| 62 |
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| 63 | " These items have nothing before or after (not even a comment), and
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| 64 | " go on column 0. Make sure that the ^\s* is followed by \( to make
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| 65 | " ORs work properly, and not include the start of line (this must
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| 66 | " always appear).
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| 67 | " The bracketed expression with the underline is a routine
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| 68 | " separator. This is one case where we do indent comment lines.
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| 69 | if this_codeline =~ '^\s*\((\*\ _\+\ \*)\|\<\(const\|var\)\>\)$'
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| 70 | return 0
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| 71 | endif
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| 72 |
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| 73 | " These items may have text after them, and go on column 0 (in most
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| 74 | " cases). The problem is that "function" and "procedure" keywords
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| 75 | " should be indented if within a class declaration.
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| 76 | if this_codeline =~ '^\s*\<\(program\|type\|uses\|procedure\|function\)\>'
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| 77 | return 0
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| 78 | endif
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| 79 |
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| 80 | " BEGIN
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| 81 | " If the begin does not come after "if", "for", or "else", then it
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| 82 | " goes in column 0
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| 83 | if this_codeline =~ '^\s*begin\>' && prev_codeline !~ '^\s*\<\(if\|for\|else\)\>'
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| 84 | return 0
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| 85 | endif
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| 86 |
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| 87 | " These keywords are indented once only.
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| 88 | if this_codeline =~ '^\s*\<\(private\)\>'
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| 89 | return &shiftwidth
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| 90 | endif
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| 91 |
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| 92 | " If the PREVIOUS LINE contained these items, the current line is
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| 93 | " always indented once.
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| 94 | if prev_codeline =~ '^\s*\<\(type\|uses\)\>'
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| 95 | return &shiftwidth
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| 96 | endif
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| 97 |
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| 98 | " These keywords are indented once only. Possibly surrounded by
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| 99 | " other chars.
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| 100 | if this_codeline =~ '^.\+\<\(object\|record\)\>'
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| 101 | return &shiftwidth
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| 102 | endif
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| 103 |
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| 104 | " If the previous line was indenting...
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| 105 | if prev_codeline =~ '^\s*\<\(for\|if\|case\|else\|end\ else\)\>'
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| 106 | " then indent.
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| 107 | let indnt = indnt + &shiftwidth
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| 108 | " BUT... if this is the start of a multistatement block then we
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| 109 | " need to align the begin with the previous line.
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| 110 | if this_codeline =~ '^\s*begin\>'
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| 111 | return indnt - &shiftwidth
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| 112 | endif
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| 113 |
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| 114 | " We also need to keep the indentation level constant if the
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| 115 | " whole if-then statement was on one line.
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| 116 | if prev_codeline =~ '\<then\>.\+'
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| 117 | let indnt = indnt - &shiftwidth
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| 118 | endif
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| 119 | endif
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| 120 |
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| 121 | " PREVIOUS-LINE BEGIN
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| 122 | " If the previous line was an indenting keyword then indent once...
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| 123 | if prev_codeline =~ '^\s*\<\(const\|var\|begin\|repeat\|private\)\>'
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| 124 | " But only if this is another var in a list.
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| 125 | if this_codeline !~ '^\s*var\>'
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| 126 | return indnt + &shiftwidth
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| 127 | endif
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| 128 | endif
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| 129 |
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| 130 | " PREVIOUS-LINE BEGIN
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| 131 | " Indent code after a case statement begin
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| 132 | if prev_codeline =~ '\:\ begin\>'
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| 133 | return indnt + &shiftwidth
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| 134 | endif
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| 135 |
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| 136 | " These words may have text before them on the line (hence the .*)
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| 137 | " but are followed by nothing. Always indent once only.
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| 138 | if prev_codeline =~ '^\(.*\|\s*\)\<\(object\|record\)\>$'
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| 139 | return indnt + &shiftwidth
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| 140 | endif
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| 141 |
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| 142 | " If we just closed a bracket that started on a previous line, then
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| 143 | " unindent. But don't return yet -- we need to check for further
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| 144 | " unindentation (for end/until/else)
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| 145 | if prev_codeline =~ '^[^(]*[^*])'
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| 146 | let indnt = indnt - &shiftwidth
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| 147 | endif
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| 148 |
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| 149 | " At the end of a block, we have to unindent both the current line
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| 150 | " (the "end" for instance) and the newly-created line.
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| 151 | if this_codeline =~ '^\s*\<\(end\|until\|else\)\>'
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| 152 | return indnt - &shiftwidth
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| 153 | endif
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| 154 |
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| 155 | " If we have opened a bracket and it continues over one line,
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| 156 | " then indent once.
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| 157 | "
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| 158 | " RE = an opening bracket followed by any amount of anything other
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| 159 | " than a closing bracket and then the end-of-line.
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| 160 | "
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| 161 | " If we didn't include the end of line, this RE would match even
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| 162 | " closed brackets, since it would match everything up to the closing
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| 163 | " bracket.
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| 164 | "
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| 165 | " This test isn't clever enough to handle brackets inside strings or
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| 166 | " comments.
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| 167 | if prev_codeline =~ '([^*]\=[^)]*$'
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| 168 | return indnt + &shiftwidth
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| 169 | endif
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| 170 |
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| 171 | return indnt
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| 172 | endfunction
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| 173 |
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