146 lines
4.4 KiB
VimL
146 lines
4.4 KiB
VimL
if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'elixir') == -1
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if exists("b:did_indent")
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finish
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endif
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let b:did_indent = 1
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setlocal nosmartindent
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setlocal indentexpr=GetElixirIndent()
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setlocal indentkeys+=0),0],0=end,0=else,0=match,0=elsif,0=catch,0=after,0=rescue
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if exists("*GetElixirIndent")
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finish
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endif
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let s:cpo_save = &cpo
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set cpo&vim
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let s:no_colon_before = ':\@<!'
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let s:no_colon_after = ':\@!'
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let s:symbols_end = '\]\|}\|)'
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let s:symbols_start = '\[\|{\|('
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let s:arrow = '^.*->$'
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let s:skip_syntax = '\%(Comment\|String\)$'
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let s:block_skip = "synIDattr(synID(line('.'),col('.'),1),'name') =~? '".s:skip_syntax."'"
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let s:block_start = '\<\%(do\|fn\)\>'
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let s:block_middle = 'else\|match\|elsif\|catch\|after\|rescue'
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let s:block_end = 'end'
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let s:starts_with_pipeline = '^\s*|>.*$'
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let s:ending_with_assignment = '=\s*$'
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let s:indent_keywords = '\<'.s:no_colon_before.'\%('.s:block_start.'\|'.s:block_middle.'\)$'.'\|'.s:arrow
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let s:deindent_keywords = '^\s*\<\%('.s:block_end.'\|'.s:block_middle.'\)\>'.'\|'.s:arrow
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let s:pair_start = '\<\%('.s:no_colon_before.s:block_start.'\)\>'.s:no_colon_after
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let s:pair_middle = '\<\%('.s:block_middle.'\)\>'.s:no_colon_after.'\zs'
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let s:pair_end = '\<\%('.s:no_colon_before.s:block_end.'\)\>\zs'
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let s:inside_block = 0
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function! GetElixirIndent()
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let lnum = prevnonblank(v:lnum - 1)
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" At the start of the file use zero indent.
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if lnum == 0
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return 0
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endif
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let opened_symbol = 0
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let current_line = getline(v:lnum)
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let last_line = getline(lnum)
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let ind = indent(lnum)
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" TODO: Remove these 2 lines
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" I don't know why, but for the test on spec/indent/lists_spec.rb:24.
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" Vim is making some mess on parsing the syntax of 'end', it is being
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" recognized as 'elixirString' when should be recognized as 'elixirBlock'.
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" This forces vim to sync the syntax.
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call synID(v:lnum, 1, 1)
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syntax sync fromstart
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if synIDattr(synID(v:lnum, 1, 1), "name") !~ s:skip_syntax
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if last_line !~ s:arrow
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let split_line = split(last_line, '\zs')
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let opened_symbol += count(split_line, '(') - count(split_line, ')')
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let opened_symbol += count(split_line, '[') - count(split_line, ']')
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let opened_symbol += count(split_line, '{') - count(split_line, '}')
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end
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" if start symbol is followed by a character, indent based on the
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" whitespace after the symbol, otherwise use the default shiftwidth
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if last_line =~ '\('.s:symbols_start.'\).'
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let opened_prefix = matchlist(last_line, '\('.s:symbols_start.'\)\s*')[0]
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let ind += (opened_symbol * strlen(opened_prefix))
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else
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let ind += (opened_symbol * &sw)
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endif
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if last_line =~ '^\s*\('.s:symbols_end.'\)' || last_line =~ s:indent_keywords
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let ind += &sw
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endif
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if current_line =~ '^\s*\('.s:symbols_end.'\)'
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let ind -= &sw
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endif
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if last_line =~ s:ending_with_assignment && opened_symbol == 0
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let b:old_ind = indent(lnum)
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let ind += &sw
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end
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" if line starts with pipeline
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" and last line ends with a pipeline,
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" align them
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if last_line =~ '|>.*$' &&
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\ current_line =~ s:starts_with_pipeline
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let ind = float2nr(match(last_line, '|>') / &sw) * &sw
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" if line starts with pipeline
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" and last line is an attribution
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" indents pipeline in same level as attribution
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elseif current_line =~ s:starts_with_pipeline &&
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\ last_line =~ '^[^=]\+=.\+$'
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if !exists('b:old_ind') || b:old_ind == 0
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let b:old_ind = indent(lnum)
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end
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let ind = float2nr(matchend(last_line, '=\s*[^ ]') / &sw) * &sw
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endif
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" if last line starts with pipeline
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" and current line doesn't start with pipeline
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" returns the indentation before the pipeline
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if last_line =~ s:starts_with_pipeline &&
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\ current_line !~ s:starts_with_pipeline
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let ind = b:old_ind
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endif
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if current_line =~ s:deindent_keywords
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let bslnum = searchpair(
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\ s:pair_start,
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\ s:pair_middle,
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\ s:pair_end,
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\ 'nbW',
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\ s:block_skip
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\ )
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let ind = indent(bslnum)
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endif
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" indent case statements '->'
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if current_line =~ s:arrow
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let ind += &sw
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endif
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endif
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return ind
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endfunction
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let &cpo = s:cpo_save
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unlet s:cpo_save
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endif
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