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if !has_key(g:polyglot_is_disabled, 'crystal')
finish
endif
" Initialization {{{1
" ==============
" Only load this indent file when no other was loaded.
if exists('b:did_indent')
finish
endif
let b:did_indent = 1
setlocal nosmartindent
" Now, set up our indentation expression and keys that trigger it.
setlocal indentexpr=GetCrystalIndent(v:lnum)
setlocal indentkeys=0{,0},0),0],!^F,o,O,e,.
setlocal indentkeys+==end,=else,=elsif,=when,=in,=ensure,=rescue
" Only define the function once.
if exists('*GetCrystalIndent')
finish
endif
" Return the value of a single shift-width
if exists('*shiftwidth')
let s:sw = function('shiftwidth')
else
function! s:sw()
return &shiftwidth
endfunction
endif
" GetCrystalIndent Function {{{1
" =========================
function! GetCrystalIndent(...) abort
" Setup {{{2
" -----
let indent_info = {}
" The value of a single shift-width
let indent_info.sw = s:sw()
" For the current line, use the first argument if given, else v:lnum
let indent_info.clnum = a:0 ? a:1 : v:lnum
let indent_info.cline = getline(indent_info.clnum)
" Set up variables for restoring position in file.
let indent_info.col = col('.')
" Work on the current line {{{2
" ------------------------
for callback_name in g:crystal#indent#curr_line_callbacks
let indent = call(function(callback_name), [indent_info])
if indent >= 0
return indent
endif
endfor
" Work on the previous line. {{{2
" --------------------------
" Special case: we don't need the real PrevNonBlank for an empty line
" inside a string. And that call can be quite expensive in that
" particular situation.
let indent = crystal#indent#EmptyInsideString(indent_info)
if indent >= 0
return indent
endif
" Previous line number
let indent_info.plnum = crystal#indent#PrevNonBlank(indent_info.clnum - 1)
let indent_info.pline = getline(indent_info.plnum)
for callback_name in g:crystal#indent#prev_line_callbacks
let indent = call(function(callback_name), [indent_info])
if indent >= 0
return indent
endif
endfor
" Work on the MSL. {{{2
" ----------------
" Most Significant line based on the previous one -- in case it's a
" contination of something above
let indent_info.plnum_msl = crystal#indent#GetMSL(indent_info.plnum)
let indent_info.pline_msl = getline(indent_info.plnum_msl)
for callback_name in g:crystal#indent#msl_callbacks
let indent = call(function(callback_name), [indent_info])
if indent >= 0
return indent
endif
endfor
" }}}2
" By default, just return the previous line's indent
return indent(indent_info.plnum)
endfunction
" }}}1
" vim:sw=2 sts=2 ts=8 fdm=marker et:
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