| " vim: set sw=4 sts=4: |
| " Maintainer : Gergely Kontra <kgergely@mcl.hu> |
| " 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 |
