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+"------------------------------------------------------------------------------
+" Description: Vim Ada indent file
+" Language: Ada (2005)
+" $Id: ada.vim 887 2008-07-08 14:29:01Z krischik $
+" Copyright: Copyright (C) 2006 Martin Krischik
+" Maintainer: Martin Krischik <krischik@users.sourceforge.net>
+" Neil Bird <neil@fnxweb.com>
+" Ned Okie <nokie@radford.edu>
+" $Author: krischik $
+" $Date: 2008-07-08 16:29:01 +0200 (Di, 08 Jul 2008) $
+" Version: 4.6
+" $Revision: 887 $
+" $HeadURL: https://gnuada.svn.sourceforge.net/svnroot/gnuada/trunk/tools/vim/indent/ada.vim $
+" History: 24.05.2006 MK Unified Headers
+" 16.07.2006 MK Ada-Mode as vim-ball
+" 15.10.2006 MK Bram's suggestion for runtime integration
+" 05.11.2006 MK Bram suggested to save on spaces
+" 19.09.2007 NO g: missing before ada#Comment
+" 2022 April: b:undo_indent added by Doug Kearns
+" Help Page: ft-vim-indent
+"------------------------------------------------------------------------------
+" ToDo:
+" Verify handling of multi-line exprs. and recovery upon the final ';'.
+" Correctly find comments given '"' and "" ==> " syntax.
+" Combine the two large block-indent functions into one?
+"------------------------------------------------------------------------------
+
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent") || version < 700
+ finish
+endif
+
+let b:did_indent = 45
+
+setlocal indentexpr=GetAdaIndent()
+setlocal indentkeys-=0{,0}
+setlocal indentkeys+=0=~then,0=~end,0=~elsif,0=~when,0=~exception,0=~begin,0=~is,0=~record
+
+let b:undo_indent = "setl inde< indk<"
+
+" Only define the functions once.
+if exists("*GetAdaIndent")
+ finish
+endif
+let s:keepcpo= &cpo
+set cpo&vim
+
+if exists("g:ada_with_gnat_project_files")
+ let s:AdaBlockStart = '^\s*\(if\>\|while\>\|else\>\|elsif\>\|loop\>\|for\>.*\<\(loop\|use\)\>\|declare\>\|begin\>\|type\>.*\<is\>[^;]*$\|\(type\>.*\)\=\<record\>\|procedure\>\|function\>\|accept\>\|do\>\|task\>\|package\>\|project\>\|then\>\|when\>\|is\>\)'
+else
+ let s:AdaBlockStart = '^\s*\(if\>\|while\>\|else\>\|elsif\>\|loop\>\|for\>.*\<\(loop\|use\)\>\|declare\>\|begin\>\|type\>.*\<is\>[^;]*$\|\(type\>.*\)\=\<record\>\|procedure\>\|function\>\|accept\>\|do\>\|task\>\|package\>\|then\>\|when\>\|is\>\)'
+endif
+
+" Section: s:MainBlockIndent {{{1
+"
+" Try to find indent of the block we're in
+" prev_indent = the previous line's indent
+" prev_lnum = previous line (to start looking on)
+" blockstart = expr. that indicates a possible start of this block
+" stop_at = if non-null, if a matching line is found, gives up!
+" No recursive previous block analysis: simply look for a valid line
+" with a lesser or equal indent than we currently (on prev_lnum) have.
+" This shouldn't work as well as it appears to with lines that are currently
+" nowhere near the correct indent (e.g., start of line)!
+" Seems to work OK as it 'starts' with the indent of the /previous/ line.
+function s:MainBlockIndent (prev_indent, prev_lnum, blockstart, stop_at)
+ let lnum = a:prev_lnum
+ let line = substitute( getline(lnum), g:ada#Comment, '', '' )
+ while lnum > 1
+ if a:stop_at != '' && line =~ '^\s*' . a:stop_at && indent(lnum) < a:prev_indent
+ return a:prev_indent
+ elseif line =~ '^\s*' . a:blockstart
+ let ind = indent(lnum)
+ if ind < a:prev_indent
+ return ind
+ endif
+ endif
+
+ let lnum = prevnonblank(lnum - 1)
+ " Get previous non-blank/non-comment-only line
+ while 1
+ let line = substitute( getline(lnum), g:ada#Comment, '', '' )
+ if line !~ '^\s*$' && line !~ '^\s*#'
+ break
+ endif
+ let lnum = prevnonblank(lnum - 1)
+ if lnum <= 0
+ return a:prev_indent
+ endif
+ endwhile
+ endwhile
+ " Fallback - just move back one
+ return a:prev_indent - shiftwidth()
+endfunction MainBlockIndent
+
+" Section: s:EndBlockIndent {{{1
+"
+" Try to find indent of the block we're in (and about to complete),
+" including handling of nested blocks. Works on the 'end' of a block.
+" prev_indent = the previous line's indent
+" prev_lnum = previous line (to start looking on)
+" blockstart = expr. that indicates a possible start of this block
+" blockend = expr. that indicates a possible end of this block
+function s:EndBlockIndent( prev_indent, prev_lnum, blockstart, blockend )
+ let lnum = a:prev_lnum
+ let line = getline(lnum)
+ let ends = 0
+ while lnum > 1
+ if getline(lnum) =~ '^\s*' . a:blockstart
+ let ind = indent(lnum)
+ if ends <= 0
+ if ind < a:prev_indent
+ return ind
+ endif
+ else
+ let ends = ends - 1
+ endif
+ elseif getline(lnum) =~ '^\s*' . a:blockend
+ let ends = ends + 1
+ endif
+
+ let lnum = prevnonblank(lnum - 1)
+ " Get previous non-blank/non-comment-only line
+ while 1
+ let line = getline(lnum)
+ let line = substitute( line, g:ada#Comment, '', '' )
+ if line !~ '^\s*$'
+ break
+ endif
+ let lnum = prevnonblank(lnum - 1)
+ if lnum <= 0
+ return a:prev_indent
+ endif
+ endwhile
+ endwhile
+ " Fallback - just move back one
+ return a:prev_indent - shiftwidth()
+endfunction EndBlockIndent
+
+" Section: s:StatementIndent {{{1
+"
+" Return indent of previous statement-start
+" (after we've indented due to multi-line statements).
+" This time, we start searching on the line *before* the one given (which is
+" the end of a statement - we want the previous beginning).
+function s:StatementIndent( current_indent, prev_lnum )
+ let lnum = a:prev_lnum
+ while lnum > 0
+ let prev_lnum = lnum
+ let lnum = prevnonblank(lnum - 1)
+ " Get previous non-blank/non-comment-only line
+ while 1
+ let line = substitute( getline(lnum), g:ada#Comment, '', '' )
+
+ if line !~ '^\s*$' && line !~ '^\s*#'
+ break
+ endif
+ let lnum = prevnonblank(lnum - 1)
+ if lnum <= 0
+ return a:current_indent
+ endif
+ endwhile
+ " Leave indent alone if our ';' line is part of a ';'-delineated
+ " aggregate (e.g., procedure args.) or first line after a block start.
+ if line =~ s:AdaBlockStart || line =~ '(\s*$'
+ return a:current_indent
+ endif
+ if line !~ '[.=(]\s*$'
+ let ind = indent(prev_lnum)
+ if ind < a:current_indent
+ return ind
+ endif
+ endif
+ endwhile
+ " Fallback - just use current one
+ return a:current_indent
+endfunction StatementIndent
+
+
+" Section: GetAdaIndent {{{1
+"
+" Find correct indent of a new line based upon what went before
+"
+function GetAdaIndent()
+ " Find a non-blank line above the current line.
+ let lnum = prevnonblank(v:lnum - 1)
+ let ind = indent(lnum)
+ let package_line = 0
+
+ " Get previous non-blank/non-comment-only/non-cpp line
+ while 1
+ let line = substitute( getline(lnum), g:ada#Comment, '', '' )
+ if line !~ '^\s*$' && line !~ '^\s*#'
+ break
+ endif
+ let lnum = prevnonblank(lnum - 1)
+ if lnum <= 0
+ return ind
+ endif
+ endwhile
+
+ " Get default indent (from prev. line)
+ let ind = indent(lnum)
+ let initind = ind
+
+ " Now check what's on the previous line
+ if line =~ s:AdaBlockStart || line =~ '(\s*$'
+ " Check for false matches to AdaBlockStart
+ let false_match = 0
+ if line =~ '^\s*\(procedure\|function\|package\)\>.*\<is\s*new\>'
+ " Generic instantiation
+ let false_match = 1
+ elseif line =~ ')\s*;\s*$' || line =~ '^\([^(]*([^)]*)\)*[^(]*;\s*$'
+ " forward declaration
+ let false_match = 1
+ endif
+ " Move indent in
+ if ! false_match
+ let ind = ind + shiftwidth()
+ endif
+ elseif line =~ '^\s*\(case\|exception\)\>'
+ " Move indent in twice (next 'when' will move back)
+ let ind = ind + 2 * shiftwidth()
+ elseif line =~ '^\s*end\s*record\>'
+ " Move indent back to tallying 'type' preceding the 'record'.
+ " Allow indent to be equal to 'end record's.
+ let ind = s:MainBlockIndent( ind+shiftwidth(), lnum, 'type\>', '' )
+ elseif line =~ '\(^\s*new\>.*\)\@<!)\s*[;,]\s*$'
+ " Revert to indent of line that started this parenthesis pair
+ exe lnum
+ exe 'normal! $F)%'
+ if getline('.') =~ '^\s*('
+ " Dire layout - use previous indent (could check for g:ada#Comment here)
+ let ind = indent( prevnonblank( line('.')-1 ) )
+ else
+ let ind = indent('.')
+ endif
+ exe v:lnum
+ elseif line =~ '[.=(]\s*$'
+ " A statement continuation - move in one
+ let ind = ind + shiftwidth()
+ elseif line =~ '^\s*new\>'
+ " Multiple line generic instantiation ('package blah is\nnew thingy')
+ let ind = s:StatementIndent( ind - shiftwidth(), lnum )
+ elseif line =~ ';\s*$'
+ " Statement end (but not 'end' ) - try to find current statement-start indent
+ let ind = s:StatementIndent( ind, lnum )
+ endif
+
+ " Check for potential argument list on next line
+ let continuation = (line =~ '[A-Za-z0-9_]\s*$')
+
+
+ " Check current line; search for simplistic matching start-of-block
+ let line = getline(v:lnum)
+ if line =~ '^\s*#'
+ " Start of line for ada-pp
+ let ind = 0
+ elseif continuation && line =~ '^\s*('
+ " Don't do this if we've already indented due to the previous line
+ if ind == initind
+ let ind = ind + shiftwidth()
+ endif
+ elseif line =~ '^\s*\(begin\|is\)\>'
+ let ind = s:MainBlockIndent( ind, lnum, '\(procedure\|function\|declare\|package\|task\)\>', 'begin\>' )
+ elseif line =~ '^\s*record\>'
+ let ind = s:MainBlockIndent( ind, lnum, 'type\>\|for\>.*\<use\>', '' ) + shiftwidth()
+ elseif line =~ '^\s*\(else\|elsif\)\>'
+ let ind = s:MainBlockIndent( ind, lnum, 'if\>', '' )
+ elseif line =~ '^\s*when\>'
+ " Align 'when' one /in/ from matching block start
+ let ind = s:MainBlockIndent( ind, lnum, '\(case\|exception\)\>', '' ) + shiftwidth()
+ elseif line =~ '^\s*end\>\s*\<if\>'
+ " End of if statements
+ let ind = s:EndBlockIndent( ind, lnum, 'if\>', 'end\>\s*\<if\>' )
+ elseif line =~ '^\s*end\>\s*\<loop\>'
+ " End of loops
+ let ind = s:EndBlockIndent( ind, lnum, '\(\(while\|for\)\>.*\)\?\<loop\>', 'end\>\s*\<loop\>' )
+ elseif line =~ '^\s*end\>\s*\<record\>'
+ " End of records
+ let ind = s:EndBlockIndent( ind, lnum, '\(type\>.*\)\=\<record\>', 'end\>\s*\<record\>' )
+ elseif line =~ '^\s*end\>\s*\<procedure\>'
+ " End of procedures
+ let ind = s:EndBlockIndent( ind, lnum, 'procedure\>.*\<is\>', 'end\>\s*\<procedure\>' )
+ elseif line =~ '^\s*end\>\s*\<case\>'
+ " End of case statement
+ let ind = s:EndBlockIndent( ind, lnum, 'case\>.*\<is\>', 'end\>\s*\<case\>' )
+ elseif line =~ '^\s*end\>'
+ " General case for end
+ let ind = s:MainBlockIndent( ind, lnum, '\(if\|while\|for\|loop\|accept\|begin\|record\|case\|exception\|package\)\>', '' )
+ elseif line =~ '^\s*exception\>'
+ let ind = s:MainBlockIndent( ind, lnum, 'begin\>', '' )
+ elseif line =~ '^\s*then\>'
+ let ind = s:MainBlockIndent( ind, lnum, 'if\>', '' )
+ endif
+
+ return ind
+endfunction GetAdaIndent
+
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
+finish " 1}}}
+
+"------------------------------------------------------------------------------
+" Copyright (C) 2006 Martin Krischik
+"
+" Vim is Charityware - see ":help license" or uganda.txt for licence details.
+"------------------------------------------------------------------------------
+" vim: textwidth=78 wrap tabstop=8 shiftwidth=3 softtabstop=3 noexpandtab
+" vim: foldmethod=marker