" vim: set sw=4 sts=4: " Maintainer : Gergely Kontra " Revised on : 2002.02.18. 23:34:05 " Language : Prolog " TODO: " checking with respect to syntax highlighting " ignoring multiline comments " detecting multiline strings " Only load this indent file when no other was loaded. if exists("b:did_indent") finish endif let b:did_indent = 1 setlocal indentexpr=GetPrologIndent() setlocal indentkeys-=:,0# setlocal indentkeys+=0%,-,0;,>,0) " Only define the function once. "if exists("*GetPrologIndent") " finish "endif function! GetPrologIndent() " 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 clause head on previous line if pline =~ ':-\s*\(%.*\)\?$' let ind = ind + &sw " Check for end of clause on previous line elseif pline =~ '\.\s*\(%.*\)\?$' let ind = ind - &sw endif " Check for opening conditional on previous line if pline =~ '^\s*\([(;]\|->\)' let ind = ind + &sw endif " Check for closing an unclosed paren, or middle ; or -> if line =~ '^\s*\([);]\|->\)' let ind = ind - &sw endif return ind endfunction