view runtime/indent/falcon.vim @ 33293:42b89193ab3e v9.0.1912

patch 9.0.1912: Cirrus-CI running out of credits Commit: https://github.com/vim/vim/commit/6f00d17e8d64ed46c85625e8ac38ed0928b32c58 Author: Christian Brabandt <cb@256bit.org> Date: Tue Sep 19 20:16:46 2023 +0200 patch 9.0.1912: Cirrus-CI running out of credits Problem: Cirrus-CI running out of credits Solution: disable Cirrus-CI for now We are running out of credits for Cirrus CI already at the middle of the month and unfortunately this means our CI now consistently fails. This all hapens because cirrus ci is not enforcing the free-tier limits (see also https://cirrus-ci.org/blog/2023/07/17/limiting-free-usage-of-cirrus-ci/). Perhaps at the beginning of the next month we can revisit and enable just a build without testing it. Hopefully this is won't take too many credits and we can at least verify that building works. Signed-off-by: Christian Brabandt <cb@256bit.org>
author Christian Brabandt <cb@256bit.org>
date Tue, 19 Sep 2023 20:30:10 +0200
parents 6dd88e45d47d
children
line wrap: on
line source

" Vim indent file
" Language: Falcon
" Maintainer: Steven Oliver <oliver.steven@gmail.com>
" Website: https://steveno@github.com/steveno/falconpl-vim.git
" Credits: This is, to a great extent, a copy n' paste of ruby.vim.
"		2022 April: b:undo_indent added by Doug Kearns

" 1. Setup {{{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

" Setup indent function and when to use it
setlocal indentexpr=FalconGetIndent(v:lnum)
setlocal indentkeys=0{,0},0),0],!^F,o,O,e
setlocal indentkeys+==~case,=~catch,=~default,=~elif,=~else,=~end,=~\"

let b:undo_indent = "setl inde< indk< si<"

" Define the appropriate indent function but only once
if exists("*FalconGetIndent")
    finish
endif

let s:cpo_save = &cpo
set cpo&vim

" 2. Variables {{{1
" ============

" Regex of syntax group names that are strings AND comments
let s:syng_strcom = '\<falcon\%(String\|StringEscape\|Comment\)\>'

" Regex of syntax group names that are strings
let s:syng_string = '\<falcon\%(String\|StringEscape\)\>'

" Regex that defines blocks.
"
" Note that there's a slight problem with this regex and s:continuation_regex.
" Code like this will be matched by both:
"
"   method_call do |(a, b)|
"
" The reason is that the pipe matches a hanging "|" operator.
"
let s:block_regex =
      \ '\%(\<do:\@!\>\|%\@<!{\)\s*\%(|\s*(*\s*\%([*@&]\=\h\w*,\=\s*\)\%(,\s*(*\s*[*@&]\=\h\w*\s*)*\s*\)*|\)\=\s*\%(#.*\)\=$'

let s:block_continuation_regex = '^\s*[^])}\t ].*'.s:block_regex

" Regex that defines continuation lines.
" TODO: this needs to deal with if ...: and so on
let s:continuation_regex =
      \ '\%(%\@<![({[\\.,:*/%+]\|\<and\|\<or\|\%(<%\)\@<![=-]\|\W[|&?]\|||\|&&\)\s*\%(#.*\)\=$'

" Regex that defines bracket continuations
let s:bracket_continuation_regex = '%\@<!\%([({[]\)\s*\%(#.*\)\=$'

" Regex that defines continuation lines, not including (, {, or [.
let s:non_bracket_continuation_regex = '\%([\\.,:*/%+]\|\<and\|\<or\|\%(<%\)\@<![=-]\|\W[|&?]\|||\|&&\)\s*\%(#.*\)\=$'

" Keywords to indent on
let s:falcon_indent_keywords = '^\s*\(case\|catch\|class\|enum\|default\|elif\|else' .
    \ '\|for\|function\|if.*"[^"]*:.*"\|if \(\(:\)\@!.\)*$\|loop\|object\|select' .
    \ '\|switch\|try\|while\|\w*\s*=\s*\w*([$\)'

" Keywords to deindent on
let s:falcon_deindent_keywords = '^\s*\(case\|catch\|default\|elif\|else\|end\)'

" 3. Functions {{{1
" ============

" Check if the character at lnum:col is inside a string, comment, or is ascii.
function s:IsInStringOrComment(lnum, col)
    return synIDattr(synID(a:lnum, a:col, 1), 'name') =~ s:syng_strcom
endfunction

" Check if the character at lnum:col is inside a string.
function s:IsInString(lnum, col)
    return synIDattr(synID(a:lnum, a:col, 1), 'name') =~ s:syng_string
endfunction

" Check if the character at lnum:col is inside a string delimiter
function s:IsInStringDelimiter(lnum, col)
    return synIDattr(synID(a:lnum, a:col, 1), 'name') == 'falconStringDelimiter'
endfunction

" Find line above 'lnum' that isn't empty, in a comment, or in a string.
function s:PrevNonBlankNonString(lnum)
    let in_block = 0
    let lnum = prevnonblank(a:lnum)
    while lnum > 0
	" Go in and out of blocks comments as necessary.
	" If the line isn't empty (with opt. comment) or in a string, end search.
	let line = getline(lnum)
	if line =~ '^=begin'
	    if in_block
		let in_block = 0
	    else
		break
	    endif
	elseif !in_block && line =~ '^=end'
	    let in_block = 1
	elseif !in_block && line !~ '^\s*#.*$' && !(s:IsInStringOrComment(lnum, 1)
		    \ && s:IsInStringOrComment(lnum, strlen(line)))
	    break
	endif
	let lnum = prevnonblank(lnum - 1)
    endwhile
    return lnum
endfunction

" Find line above 'lnum' that started the continuation 'lnum' may be part of.
function s:GetMSL(lnum)
    " Start on the line we're at and use its indent.
    let msl = a:lnum
    let msl_body = getline(msl)
    let lnum = s:PrevNonBlankNonString(a:lnum - 1)
    while lnum > 0
	" If we have a continuation line, or we're in a string, use line as MSL.
	" Otherwise, terminate search as we have found our MSL already.
	let line = getline(lnum)
	
	if s:Match(line, s:non_bracket_continuation_regex) &&
          	\ s:Match(msl, s:non_bracket_continuation_regex)
	    " If the current line is a non-bracket continuation and so is the
	    " previous one, keep its indent and continue looking for an MSL.
	    "    
	    " Example:
	    "   method_call one,
	    "       two,
	    "           three
	    "           
	    let msl = lnum
	elseif s:Match(lnum, s:non_bracket_continuation_regex) &&
		    \ (s:Match(msl, s:bracket_continuation_regex) || s:Match(msl, s:block_continuation_regex))
	    " If the current line is a bracket continuation or a block-starter, but
	    " the previous is a non-bracket one, respect the previous' indentation,
	    " and stop here.
	    " 
	    " Example:
	    "   method_call one,
	    "       two {
	    "           three
	    "
	    return lnum
	elseif s:Match(lnum, s:bracket_continuation_regex) &&
		    \ (s:Match(msl, s:bracket_continuation_regex) || s:Match(msl, s:block_continuation_regex))
	    " If both lines are bracket continuations (the current may also be a
	    " block-starter), use the current one's and stop here
	    "
	    " Example:
	    "   method_call(
	    "       other_method_call(
	    "             foo
	    return msl
	elseif s:Match(lnum, s:block_regex) &&
		    \ !s:Match(msl, s:continuation_regex) &&
		    \ !s:Match(msl, s:block_continuation_regex)
	    " If the previous line is a block-starter and the current one is
	    " mostly ordinary, use the current one as the MSL.
	    " 
	    " Example:
	    "   method_call do
	    "       something
	    "           something_else
	    return msl
	else
	    let col = match(line, s:continuation_regex) + 1
	    if (col > 0 && !s:IsInStringOrComment(lnum, col))
			\ || s:IsInString(lnum, strlen(line))
		let msl = lnum
	    else
		break
	    endif
	endif
	
	let msl_body = getline(msl)
	let lnum = s:PrevNonBlankNonString(lnum - 1)
    endwhile
    return msl
endfunction

" Check if line 'lnum' has more opening brackets than closing ones.
function s:ExtraBrackets(lnum)
    let opening = {'parentheses': [], 'braces': [], 'brackets': []}
    let closing = {'parentheses': [], 'braces': [], 'brackets': []}

    let line = getline(a:lnum)
    let pos  = match(line, '[][(){}]', 0)

    " Save any encountered opening brackets, and remove them once a matching
    " closing one has been found. If a closing bracket shows up that doesn't
    " close anything, save it for later.
    while pos != -1
	if !s:IsInStringOrComment(a:lnum, pos + 1)
	    if line[pos] == '('
		call add(opening.parentheses, {'type': '(', 'pos': pos})
	    elseif line[pos] == ')'
		if empty(opening.parentheses)
		    call add(closing.parentheses, {'type': ')', 'pos': pos})
		else
		    let opening.parentheses = opening.parentheses[0:-2]
		endif
	    elseif line[pos] == '{'
		call add(opening.braces, {'type': '{', 'pos': pos})
	    elseif line[pos] == '}'
		if empty(opening.braces)
		    call add(closing.braces, {'type': '}', 'pos': pos})
		else
		    let opening.braces = opening.braces[0:-2]
		endif
	    elseif line[pos] == '['
		call add(opening.brackets, {'type': '[', 'pos': pos})
	    elseif line[pos] == ']'
		if empty(opening.brackets)
		    call add(closing.brackets, {'type': ']', 'pos': pos})
		else
		    let opening.brackets = opening.brackets[0:-2]
		endif
	    endif
	endif
	
	let pos = match(line, '[][(){}]', pos + 1)
    endwhile

    " Find the rightmost brackets, since they're the ones that are important in
    " both opening and closing cases
    let rightmost_opening = {'type': '(', 'pos': -1}
    let rightmost_closing = {'type': ')', 'pos': -1}

    for opening in opening.parentheses + opening.braces + opening.brackets
	if opening.pos > rightmost_opening.pos
	    let rightmost_opening = opening
	endif
    endfor

    for closing in closing.parentheses + closing.braces + closing.brackets
	if closing.pos > rightmost_closing.pos
	    let rightmost_closing = closing
	endif
    endfor

    return [rightmost_opening, rightmost_closing]
endfunction

function s:Match(lnum, regex)
    let col = match(getline(a:lnum), '\C'.a:regex) + 1
    return col > 0 && !s:IsInStringOrComment(a:lnum, col) ? col : 0
endfunction

function s:MatchLast(lnum, regex)
    let line = getline(a:lnum)
    let col = match(line, '.*\zs' . a:regex)
    while col != -1 && s:IsInStringOrComment(a:lnum, col)
	let line = strpart(line, 0, col)
	let col = match(line, '.*' . a:regex)
    endwhile
    return col + 1
endfunction

" 4. FalconGetIndent Routine {{{1
" ============

function FalconGetIndent(...)
    " For the current line, use the first argument if given, else v:lnum
    let clnum = a:0 ? a:1 : v:lnum

    " Use zero indent at the top of the file
    if clnum == 0
        return 0
    endif

    let line = getline(clnum)
    let ind = -1

    " If we got a closing bracket on an empty line, find its match and indent
    " according to it.  For parentheses we indent to its column - 1, for the
    " others we indent to the containing line's MSL's level.  Return -1 if fail.
    let col = matchend(line, '^\s*[]})]')
    if col > 0 && !s:IsInStringOrComment(clnum, col)
	call cursor(clnum, col)
	let bs = strpart('(){}[]', stridx(')}]', line[col - 1]) * 2, 2)
	if searchpair(escape(bs[0], '\['), '', bs[1], 'bW', s:skip_expr) > 0
	    if line[col-1]==')' && col('.') != col('$') - 1
		let ind = virtcol('.') - 1
	    else
		let ind = indent(s:GetMSL(line('.')))
	    endif
	endif
	return ind
    endif

    " If we have a deindenting keyword, find its match and indent to its level.
    " TODO: this is messy
    if s:Match(clnum, s:falcon_deindent_keywords)
	call cursor(clnum, 1)
	if searchpair(s:end_start_regex, s:end_middle_regex, s:end_end_regex, 'bW',
		    \ s:end_skip_expr) > 0
	    let msl  = s:GetMSL(line('.'))
	    let line = getline(line('.'))

	    if strpart(line, 0, col('.') - 1) =~ '=\s*$' &&
			\ strpart(line, col('.') - 1, 2) !~ 'do'
		let ind = virtcol('.') - 1
	    elseif getline(msl) =~ '=\s*\(#.*\)\=$'
		let ind = indent(line('.'))
	    else
		let ind = indent(msl)
	    endif
	endif
	return ind
    endif

    " If we are in a multi-line string or line-comment, don't do anything to it.
    if s:IsInString(clnum, matchend(line, '^\s*') + 1)
	return indent('.')
    endif

    " Find a non-blank, non-multi-line string line above the current line.
    let lnum = s:PrevNonBlankNonString(clnum - 1)

    " If the line is empty and inside a string, use the previous line.
    if line =~ '^\s*$' && lnum != prevnonblank(clnum - 1)
	return indent(prevnonblank(clnum))
    endif

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

    " Set up variables for the previous line.
    let line = getline(lnum)
    let ind = indent(lnum)

    " If the previous line ended with a block opening, add a level of indent.
    if s:Match(lnum, s:block_regex)
	return indent(s:GetMSL(lnum)) + shiftwidth()
    endif

    " If it contained hanging closing brackets, find the rightmost one, find its
    " match and indent according to that.
    if line =~ '[[({]' || line =~ '[])}]\s*\%(#.*\)\=$'
	let [opening, closing] = s:ExtraBrackets(lnum)

	if opening.pos != -1
	    if opening.type == '(' && searchpair('(', '', ')', 'bW', s:skip_expr) > 0
		if col('.') + 1 == col('$')
		    return ind + shiftwidth()
		else
		    return virtcol('.')
		endif
	    else
		let nonspace = matchend(line, '\S', opening.pos + 1) - 1
		return nonspace > 0 ? nonspace : ind + shiftwidth()
	    endif
	elseif closing.pos != -1
	    call cursor(lnum, closing.pos + 1)
	    normal! %

	    if s:Match(line('.'), s:falcon_indent_keywords)
		return indent('.') + shiftwidth()
	    else
		return indent('.')
	    endif
	else
	    call cursor(clnum, 0)  " FIXME: column was vcol
	end
    endif

    " If the previous line ended with an "end", match that "end"s beginning's
    " indent.
    let col = s:Match(lnum, '\%(^\|[^.:@$]\)\<end\>\s*\%(#.*\)\=$')
    if col > 0
	call cursor(lnum, col)
	if searchpair(s:end_start_regex, '', s:end_end_regex, 'bW',
		    \ s:end_skip_expr) > 0
	    let n = line('.')
	    let ind = indent('.')
	    let msl = s:GetMSL(n)
	    if msl != n
		let ind = indent(msl)
	    end
	    return ind
	endif
    end

    let col = s:Match(lnum, s:falcon_indent_keywords)
    if col > 0
	call cursor(lnum, col)
	let ind = virtcol('.') - 1 + shiftwidth()
	" TODO: make this better (we need to count them) (or, if a searchpair
	" fails, we know that something is lacking an end and thus we indent a
	" level
	if s:Match(lnum, s:end_end_regex)
	    let ind = indent('.')
	endif
	return ind
    endif

    " Set up variables to use and search for MSL to the previous line.
    let p_lnum = lnum
    let lnum = s:GetMSL(lnum)

    " If the previous line wasn't a MSL and is continuation return its indent.
    " TODO: the || s:IsInString() thing worries me a bit.
    if p_lnum != lnum
	if s:Match(p_lnum, s:non_bracket_continuation_regex) || s:IsInString(p_lnum,strlen(line))
	    return ind
	endif
    endif

    " Set up more variables, now that we know we wasn't continuation bound.
    let line = getline(lnum)
    let msl_ind = indent(lnum)

    " If the MSL line had an indenting keyword in it, add a level of indent.
    " TODO: this does not take into account contrived things such as
    " module Foo; class Bar; end
    if s:Match(lnum, s:falcon_indent_keywords)
	let ind = msl_ind + shiftwidth()
	if s:Match(lnum, s:end_end_regex)
	    let ind = ind - shiftwidth()
	endif
	return ind
    endif

    " If the previous line ended with [*+/.,-=], but wasn't a block ending or a
    " closing bracket, indent one extra level.
    if s:Match(lnum, s:non_bracket_continuation_regex) && !s:Match(lnum, '^\s*\([\])}]\|end\)')
	if lnum == p_lnum
	    let ind = msl_ind + shiftwidth()
	else
	    let ind = msl_ind
	endif
	return ind
    endif

  return ind
endfunction

" }}}1

let &cpo = s:cpo_save
unlet s:cpo_save

" vim: set sw=4 sts=4 et tw=80 :