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Diffstat (limited to 'runtime/indent/logtalk.vim')
| -rw-r--r-- | runtime/indent/logtalk.vim | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/runtime/indent/logtalk.vim b/runtime/indent/logtalk.vim new file mode 100644 index 0000000..8e36f86 --- /dev/null +++ b/runtime/indent/logtalk.vim @@ -0,0 +1,64 @@ +" Maintainer: Paulo Moura <pmoura@logtalk.org> +" Revised on: 2018.08.04 +" Language: Logtalk + +" This Logtalk indent file is a modified version of the Prolog +" indent file written by Gergely Kontra + +" Only load this indent file when no other was loaded. +if exists("b:did_indent") + finish +endif + +let b:did_indent = 1 + +setlocal indentexpr=GetLogtalkIndent() +setlocal indentkeys-=:,0# +setlocal indentkeys+=0%,-,0;,>,0) + +" Only define the function once. +if exists("*GetLogtalkIndent") + finish +endif + +function! GetLogtalkIndent() + " Find a non-blank line above the current line. + let pnum = prevnonblank(v:lnum - 1) + " Hit the start of the file, use zero indent. + if pnum == 0 + return 0 + endif + let line = getline(v:lnum) + let pline = getline(pnum) + + let ind = indent(pnum) + " Previous line was comment -> use previous line's indent + if pline =~ '^\s*%' + retu ind + endif + " Check for entity opening directive on previous line + if pline =~ '^\s*:-\s\(object\|protocol\|category\)\ze(.*,$' + let ind = ind + shiftwidth() + " Check for clause head on previous line + elseif pline =~ ':-\s*\(%.*\)\?$' + let ind = ind + shiftwidth() + " Check for grammar rule head on previous line + elseif pline =~ '-->\s*\(%.*\)\?$' + let ind = ind + shiftwidth() + " Check for entity closing directive on previous line + elseif pline =~ '^\s*:-\send_\(object\|protocol\|category\)\.\(%.*\)\?$' + let ind = ind - shiftwidth() + " Check for end of clause on previous line + elseif pline =~ '\.\s*\(%.*\)\?$' + let ind = ind - shiftwidth() + endif + " Check for opening conditional on previous line + if pline =~ '^\s*\([(;]\|->\)' && pline !~ '\.\s*\(%.*\)\?$' && pline !~ '^.*\([)][,]\s*\(%.*\)\?$\)' + let ind = ind + shiftwidth() + endif + " Check for closing an unclosed paren, or middle ; or -> + if line =~ '^\s*\([);]\|->\)' + let ind = ind - shiftwidth() + endif + return ind +endfunction |