if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'svelte') == -1
" Vim indent file
" Language: Svelte 3 (HTML/JavaScript)
" Author: Evan Lecklider <evan@lecklider.com>
" Maintainer: Evan Lecklide <evan@lecklider.com>
" URL: https://github.com/evanleck/vim-svelte
if exists("b:did_indent")
finish
endif
runtime! indent/html.vim
unlet! b:did_indent
let s:html_indent = &l:indentexpr
let b:did_indent = 1
if !exists('g:svelte_indent_script')
let g:svelte_indent_script = 1
endif
if !exists('g:svelte_indent_style')
let g:svelte_indent_style = 1
endif
setlocal indentexpr=GetSvelteIndent()
setlocal indentkeys=o,O,*<Return>,<>>,{,},0),0],!^F,;,=:else,=:then,=:catch,=/if,=/each,=/await
" Only define the function once.
if exists('*GetSvelteIndent')
finish
endif
function! GetSvelteIndent()
let current_line_number = v:lnum
if current_line_number == 0
return 0
endif
let current_line = getline(current_line_number)
" Opening script and style tags should be all the way outdented.
if current_line =~ '^\s*</\?\(script\|style\)'
return 0
endif
let previous_line_number = prevnonblank(current_line_number - 1)
let previous_line = getline(previous_line_number)
let previous_line_indent = indent(previous_line_number)
" The inside of scripts an styles should be indented unless disabled.
if previous_line =~ '^\s*<script'
if g:svelte_indent_script
return previous_line_indent + shiftwidth()
else
return previous_line_indent
endif
endif
if previous_line =~ '^\s*<style'
if g:svelte_indent_style
return previous_line_indent + shiftwidth()
else
return previous_line_indent
endif
endif
execute "let indent = " . s:html_indent
" For some reason, the HTML CSS indentation keeps indenting the next line over
" and over after each style declaration.
if searchpair('<style>', '', '</style>', 'bW') && previous_line =~ ';$' && current_line !~ '}'
return previous_line_indent
endif
" "/await" or ":catch" or ":then"
if current_line =~ '^\s*{\s*\/await' || current_line =~ '^\s*{\s*:\(catch\|then\)'
let await_start = searchpair('{\s*#await\>', '', '{\s*\/await\>', 'bW')
if await_start
return indent(await_start)
endif
endif
" "/each"
if current_line =~ '^\s*{\s*\/each'
let each_start = searchpair('{\s*#each\>', '', '{\s*\/each\>', 'bW')
if each_start
return indent(each_start)
endif
endif
" "/if"
if current_line =~ '^\s*{\s*\/if'
let if_start = searchpair('{\s*#if\>', '', '{\s*\/if\>', 'bW')
if if_start
return indent(if_start)
endif
endif
" ":else" is tricky because it can match an opening "#each" _or_ an opening
" "#if", so we try to be smart and look for the closest of the two.
if current_line =~ '^\s*{\s*:else'
let if_start = searchpair('{\s*#if\>', '', '{\s*\/if\>', 'bW')
" If it's an "else if" then we know to look for an "#if"
if current_line =~ '^\s*{\s*:else if' && if_start
return indent(if_start)
else
" The greater line number will be closer to the cursor position because
" we're searching backward.
return indent(max([if_start, searchpair('{\s*#each\>', '', '{\s*\/each\>', 'bW')]))
endif
endif
" "#if" or "#each"
if previous_line =~ '^\s*{\s*#\(if\|each\|await\)'
return previous_line_indent + shiftwidth()
endif
" ":else" or ":then"
if previous_line =~ '^\s*{\s*:\(else\|catch\|then\)'
return previous_line_indent + shiftwidth()
endif
" Custom element juggling for abnormal self-closing tags (<Widget />),
" capitalized component tags (<Widget></Widget>), and custom svelte tags
" (<svelte:head></svelte:head>).
if synID(previous_line_number, match(previous_line, '\S') + 1, 0) == hlID('htmlTag')
\ && synID(current_line_number, match(current_line, '\S') + 1, 0) != hlID('htmlEndTag')
let indents_match = indent == previous_line_indent
let previous_closes = previous_line =~ '/>$'
if indents_match && !previous_closes && previous_line =~ '<\(\u\|\l\+:\l\+\)'
return previous_line_indent + shiftwidth()
elseif !indents_match && previous_closes
return previous_line_indent
endif
endif
return indent
endfunction
endif
