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" Vim indent file
" Language: Dylan
" Version: 0.01
" Last Change: 2017 Jun 13
" Maintainer: Brent A. Fulgham <bfulgham@debian.org>
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
setlocal indentkeys+==~begin,=~block,=~case,=~cleanup,=~define,=~end,=~else,=~elseif,=~exception,=~for,=~finally,=~if,=~otherwise,=~select,=~unless,=~while
" Define the appropriate indent function but only once
setlocal indentexpr=DylanGetIndent()
if exists("*DylanGetIndent")
finish
endif
function DylanGetIndent()
" Get the line to be indented
let cline = getline(v:lnum)
" Don't reindent comments on first column
if cline =~ '^/\[/\*]'
return 0
endif
"Find the previous non-blank line
let lnum = prevnonblank(v:lnum - 1)
"Use zero indent at the top of the file
if lnum == 0
return 0
endif
let prevline=getline(lnum)
let ind = indent(lnum)
let chg = 0
" If previous line was a comment, use its indent
if prevline =~ '^\s*//'
return ind
endif
" If previous line was a 'define', indent
if prevline =~? '\(^\s*\(begin\|block\|case\|define\|else\|elseif\|for\|finally\|if\|select\|unless\|while\)\|\s*\S*\s*=>$\)'
let chg = shiftwidth()
" local methods indent the shift-width, plus 6 for the 'local'
elseif prevline =~? '^\s*local'
let chg = shiftwidth() + 6
" If previous line was a let with no closing semicolon, indent
elseif prevline =~? '^\s*let.*[^;]\s*$'
let chg = shiftwidth()
" If previous line opened a parenthesis, and did not close it, indent
elseif prevline =~ '^.*(\s*[^)]*\((.*)\)*[^)]*$'
return = match( prevline, '(.*\((.*)\|[^)]\)*.*$') + 1
"elseif prevline =~ '^.*(\s*[^)]*\((.*)\)*[^)]*$'
elseif prevline =~ '^[^(]*)\s*$'
" This line closes a parenthesis. Find opening
let curr_line = prevnonblank(lnum - 1)
while curr_line >= 0
let str = getline(curr_line)
if str !~ '^.*(\s*[^)]*\((.*)\)*[^)]*$'
let curr_line = prevnonblank(curr_line - 1)
else
break
endif
endwhile
if curr_line < 0
return -1
endif
let ind = indent(curr_line)
" Although we found the closing parenthesis, make sure this
" line doesn't start with an indentable command:
let curr_str = getline(curr_line)
if curr_str =~? '^\s*\(begin\|block\|case\|define\|else\|elseif\|for\|finally\|if\|select\|unless\|while\)'
let chg = shiftwidth()
endif
endif
" If a line starts with end, un-indent (even if we just indented!)
if cline =~? '^\s*\(cleanup\|end\|else\|elseif\|exception\|finally\|otherwise\)'
let chg = chg - shiftwidth()
endif
return ind + chg
endfunction
" vim:sw=2 tw=130