" LilyPond indent file
" Language: LilyPond
" Maintainer: Heikki Junes <hjunes@cc.hut.fi>
-" Last Change: 2004 Mar 01
-
+" Last Change: 2010 Jul 26
+"
+" Installed As: vim/indent/lilypond.vim
+"
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
finish
let b:did_indent = 1
setlocal indentexpr=GetLilyPondIndent()
+setlocal indentkeys=o,O,},>>,!^F
" Only define the function once.
if exists("*GetLilyPondIndent")
"Find a non-blank line above the current line.
let lnum = prevnonblank(v:lnum - 1)
- let ind = indent(lnum)
+ "Check if a block was started: '{' or '<<' is the last non-blank character of the previous line.
+ if getline(lnum) =~ '^.*\({\|<<\)\s*$'
+ let ind = indent(lnum) + &sw
+ else
+ let ind = indent(lnum)
+ endif
+
+ "Check if a block was ended: '}' or '>>' is the first non-blank character of the current line.
+ if getline(v:lnum) =~ '^\s*\(}\|>>\)'
+ let ind = ind - &sw
+ endif
+
+ " Check if the first character from the previous line is within
+ " a `lilyScheme' region, and if so, use lisp-style indentation
+ " for the current line.
+ "
+ " TODO:
+ " - Only works in version 7.1.215 or later, though it should
+ " silently fail in older versions.
+ " - We should support `lilyScheme' regions that begin in the
+ " middle of the line, too.
+ for id in synstack(lnum, 1)
+ if synIDattr(id, "name") == "lilyScheme"
+ let ind = lispindent(v:lnum)
+ endif
+ endfor
return ind
endfunction