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Diffstat (limited to '')
| -rw-r--r-- | runtime/indent/pascal.vim | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/runtime/indent/pascal.vim b/runtime/indent/pascal.vim new file mode 100644 index 0000000..b21b725 --- /dev/null +++ b/runtime/indent/pascal.vim @@ -0,0 +1,229 @@ +" Vim indent file +" Language: Pascal +" Maintainer: Neil Carter <n.carter@swansea.ac.uk> +" Created: 2004 Jul 13 +" Last Change: 2021 Sep 22 +" +" For further documentation, see https://psy.swansea.ac.uk/staff/carter/vim/ + + +if exists("b:did_indent") + finish +endif +let b:did_indent = 1 + +setlocal indentexpr=GetPascalIndent(v:lnum) +setlocal indentkeys& +setlocal indentkeys+==end;,==const,==type,==var,==begin,==repeat,==until,==for +setlocal indentkeys+==program,==function,==procedure,==object,==private +setlocal indentkeys+==record,==if,==else,==case + +let b:undo_indent = 'setlocal indentexpr< indentkeys<' + +if exists("*GetPascalIndent") + finish +endif + + +" ________________________________________________________________ +function! s:GetPrevNonCommentLineNum( line_num ) + + " Skip lines starting with a comment + let SKIP_LINES = '^\s*\(\((\*\)\|\(\*\ \)\|\(\*)\)\|{\|}\)' + + let nline = a:line_num + while nline > 0 + let nline = prevnonblank(nline-1) + if getline(nline) !~? SKIP_LINES + break + endif + endwhile + + return nline +endfunction + + +" ________________________________________________________________ +function! s:PurifyCode( line_num ) + " Strip any trailing comments and whitespace + let pureline = 'TODO' + return pureline +endfunction + + +" ________________________________________________________________ +function! GetPascalIndent( line_num ) + + " Line 0 always goes at column 0 + if a:line_num == 0 + return 0 + endif + + let this_codeline = getline( a:line_num ) + + + " SAME INDENT + + " Middle of a three-part comment + if this_codeline =~ '^\s*\*' + return indent( a:line_num - 1) + endif + + + " COLUMN 1 ALWAYS + + " Last line of the program + if this_codeline =~ '^\s*end\.' + return 0 + endif + + " Compiler directives, allowing "(*" and "{" + "if this_codeline =~ '^\s*\({\|(\*\)$\(IFDEF\|IFNDEF\|ELSE\|ENDIF\)' + if this_codeline =~ '^\s*\({\|(\*\)\$' + return 0 + endif + + " section headers + if this_codeline =~ '^\s*\(program\|procedure\|function\|type\)\>' + return 0 + endif + + " Subroutine separators, lines ending with "const" or "var" + if this_codeline =~ '^\s*\((\*\ _\+\ \*)\|\(const\|var\)\)$' + return 0 + endif + + + " OTHERWISE, WE NEED TO LOOK FURTHER BACK... + + let prev_codeline_num = s:GetPrevNonCommentLineNum( a:line_num ) + let prev_codeline = getline( prev_codeline_num ) + let indnt = indent( prev_codeline_num ) + + + " INCREASE INDENT + + " If the PREVIOUS LINE ended in these items, always indent + if prev_codeline =~ '\<\(type\|const\|var\)$' + return indnt + shiftwidth() + endif + + if prev_codeline =~ '\<repeat$' + if this_codeline !~ '^\s*until\>' + return indnt + shiftwidth() + else + return indnt + endif + endif + + if prev_codeline =~ '\<\(begin\|record\)$' + if this_codeline !~ '^\s*end\>' + return indnt + shiftwidth() + else + return indnt + endif + endif + + " If the PREVIOUS LINE ended with these items, indent if not + " followed by "begin" + if prev_codeline =~ '\<\(\|else\|then\|do\)$' || prev_codeline =~ ':$' + if this_codeline !~ '^\s*begin\>' + return indnt + shiftwidth() + else + " If it does start with "begin" then keep the same indent + "return indnt + shiftwidth() + return indnt + endif + endif + + " Inside a parameter list (i.e. a "(" without a ")"). ???? Considers + " only the line before the current one. TODO: Get it working for + " parameter lists longer than two lines. + if prev_codeline =~ '([^)]\+$' + return indnt + shiftwidth() + endif + + + " DECREASE INDENT + + " Lines starting with "else", but not following line ending with + " "end". + if this_codeline =~ '^\s*else\>' && prev_codeline !~ '\<end$' + return indnt - shiftwidth() + endif + + " Lines after a single-statement branch/loop. + " Two lines before ended in "then", "else", or "do" + " Previous line didn't end in "begin" + let prev2_codeline_num = s:GetPrevNonCommentLineNum( prev_codeline_num ) + let prev2_codeline = getline( prev2_codeline_num ) + if prev2_codeline =~ '\<\(then\|else\|do\)$' && prev_codeline !~ '\<begin$' + " If the next code line after a single statement branch/loop + " starts with "end", "except" or "finally", we need an + " additional unindentation. + if this_codeline =~ '^\s*\(end;\|except\|finally\|\)$' + " Note that we don't return from here. + return indnt - 2 * shiftwidth() + endif + return indnt - shiftwidth() + endif + + " Lines starting with "until" or "end". This rule must be overridden + " by the one for "end" after a single-statement branch/loop. In + " other words that rule should come before this one. + if this_codeline =~ '^\s*\(end\|until\)\>' + return indnt - shiftwidth() + endif + + + " MISCELLANEOUS THINGS TO CATCH + + " Most "begin"s will have been handled by now. Any remaining + " "begin"s on their own line should go in column 1. + if this_codeline =~ '^\s*begin$' + return 0 + endif + + +" ________________________________________________________________ +" Object/Borland Pascal/Delphi Extensions +" +" Note that extended-pascal is handled here, unless it is simpler to +" handle them in the standard-pascal section above. + + + " COLUMN 1 ALWAYS + + " section headers at start of line. + if this_codeline =~ '^\s*\(interface\|implementation\|uses\|unit\)\>' + return 0 + endif + + + " INDENT ONCE + + " If the PREVIOUS LINE ended in these items, always indent. + if prev_codeline =~ '^\s*\(unit\|uses\|try\|except\|finally\|private\|protected\|public\|published\)$' + return indnt + shiftwidth() + endif + + " ???? Indent "procedure" and "functions" if they appear within an + " class/object definition. But that means overriding standard-pascal + " rule where these words always go in column 1. + + + " UNINDENT ONCE + + if this_codeline =~ '^\s*\(except\|finally\)$' + return indnt - shiftwidth() + endif + + if this_codeline =~ '^\s*\(private\|protected\|public\|published\)$' + return indnt - shiftwidth() + endif + + + " If nothing changed, return same indent. + return indnt +endfunction + |