" Vim indent file
" Program: CMake - Cross-Platform Makefile Generator
" Module: $RCSfile: cmake-indent.vim,v $
" Language: CMake (ft=cmake)
" Author: Andy Cedilnik <[email protected]>
" Maintainer: Karthik Krishnan <[email protected]>
" Last Change: $Date: 2008-01-16 16:53:53 $
" Version: $Revision: 1.9 $
"
" Licence: The CMake license applies to this file. See
" http://www.cmake.org/HTML/Copyright.html
" This implies that distribution with Vim is allowed

if exists("b:did_indent")
finish
endif
let b:did_indent = 1

setlocal indentexpr=CMakeGetIndent(v:lnum)
setlocal indentkeys+==ENDIF(,ENDFOREACH(,ENDMACRO(,ELSE(,ELSEIF(,ENDWHILE(

" Only define the function once.
if exists("*CMakeGetIndent")
finish
endif
let s:keepcpo= &cpo
set cpo&vim

fun! CMakeGetIndent(lnum)
let this_line = getline(a:lnum)

" Find a non-blank line above the current line.
let lnum = a:lnum
let lnum = prevnonblank(lnum - 1)
let previous_line = getline(lnum)

" Hit the start of the file, use zero indent.
if lnum == 0
return 0
endif

let ind = indent(lnum)

let or = '\|'
" Regular expressions used by line indentation function.
let cmake_regex_comment = '#.*'
let cmake_regex_identifier = '[A-Za-z][A-Za-z0-9_]*'
let cmake_regex_quoted = '"\([^"\\]\|\\.\)*"'
let cmake_regex_arguments = '\(' . cmake_regex_quoted .
\ or . '\$(' . cmake_regex_identifier . ')' .
\ or . '[^()\\#"]' . or . '\\.' . '\)*'

let cmake_indent_comment_line = '^\s*' . cmake_regex_comment
let cmake_indent_blank_regex = '^\s*$'
let cmake_indent_open_regex = '^\s*' . cmake_regex_identifier .
\ '\s*(' . cmake_regex_arguments .
\ '\(' . cmake_regex_comment . '\)\?$'

let cmake_indent_close_regex = '^' . cmake_regex_arguments .
\ ')\s*' .
\ '\(' . cmake_regex_comment . '\)\?$'

let cmake_indent_begin_regex = '^\s*\(IF\|MACRO\|FOREACH\|ELSE\|ELSEIF\|WHILE\|FUNCTION\)\s*('
let cmake_indent_end_regex = '^\s*\(ENDIF\|ENDFOREACH\|ENDMACRO\|ELSE\|ELSEIF\|ENDWHILE\|ENDFUNCTION\)\s*('

" Add
if previous_line =~? cmake_indent_comment_line " Handle comments
let ind = ind
else
if previous_line =~? cmake_indent_begin_regex
let ind = ind + &sw
endif
if previous_line =~? cmake_indent_open_regex
let ind = ind + &sw
endif
endif

" Subtract
if this_line =~? cmake_indent_end_regex
let ind = ind - &sw
endif
if previous_line =~? cmake_indent_close_regex
let ind = ind - &sw
endif

return ind
endfun

let &cpo = s:keepcpo
unlet s:keepcpo