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" Vim indent file
" Language: Handlebars
" Maintainer: Devin Weaver
" Last Change: 2026 Feb 20
" Origin: https://github.com/joukevandermaas/vim-ember-hbs
" Credits: Jouke van der Maas
" Acknowledgement: Based on eruby.vim indentation by TPope
" License: MIT
" The MIT License (MIT)
"
" Copyright (c) 2026 Devin Weaver
" Copyright (c) 2015 Jouke van der Maas
"
" Permission is hereby granted, free of charge, to any person obtaining a copy
" of this software and associated documentation files (the "Software"), to deal
" in the Software without restriction, including without limitation the rights
" to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
" copies of the Software, and to permit persons to whom the Software is
" furnished to do so, subject to the following conditions:
"
" The above copyright notice and this permission notice shall be included in all
" copies or substantial portions of the Software.
"
" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
" IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
" FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
" AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
" LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
" OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
" SOFTWARE.
if exists("b:did_indent")
finish
endif
runtime! indent/html.vim
unlet! b:did_indent
" Force HTML indent to not keep state.
let b:html_indent_usestate = 0
let b:handlebars_current_indent = 0
if &l:indentexpr == ''
if &l:cindent
let &l:indentexpr = 'cindent(v:lnum)'
else
let &l:indentexpr = 'indent(prevnonblank(v:lnum-1))'
endif
endif
let b:handlebars_subtype_indentexpr = &l:indentexpr
let b:did_indent = 1
setlocal indentexpr=GetHandlebarsIndent()
setlocal indentkeys=o,O,*<Return>,<>>,{,},0),0],o,O,!^F,=else,={{#,={{/
" Only define the function once.
if exists("*GetHandlebarsIndent")
finish
endif
function! GetHandlebarsIndent(...)
" The value of a single shift-width
let sw = shiftwidth()
if a:0 && a:1 == '.'
let v:lnum = line('.')
elseif a:0 && a:1 =~ '^\d'
let v:lnum = a:1
endif
let vcol = col('.')
call cursor(v:lnum,1)
call cursor(v:lnum,vcol)
exe "let ind = ".b:handlebars_subtype_indentexpr
" Workaround for Andy Wokula's HTML indent. This should be removed after
" some time, since the newest version is fixed in a different way. Credit
" to eruby.vim indent by tpope
if b:handlebars_subtype_indentexpr =~# '^HtmlIndent('
\ && exists('b:indent')
\ && type(b:indent) == type({})
\ && has_key(b:indent, 'lnum')
" Force HTML indent to not keep state
let b:indent.lnum = -1
endif
let lnum = prevnonblank(v:lnum-1)
let prevLine = getline(lnum)
let currentLine = getline(v:lnum)
" all indent rules only apply if the block opening/closing
" tag is on a separate line
" indent after block {{#block
if prevLine =~# '\v\s*\{\{\#'
let ind = ind + sw
endif
" but not if the block ends on the same line
if prevLine =~# '\v\s*\{\{\#(.+)(\s+|\}\}).+\{\{\/\1'
let ind = ind - sw
endif
" unindent after block close {{/block}}
if currentLine =~# '\v^\s*\{\{\/'
let ind = ind - sw
endif
" indent after component block {{a-component
if prevLine =~# '\v\s*\{\{\w'
let ind = ind + sw
endif
" but not if the component block ends on the same line
if prevLine =~# '\v\s*\{\{\w(.+)\}\}'
let ind = ind - sw
endif
" unindent }} lines
if currentLine =~# '\v^\s*\}\}\s*$' || (currentLine !~# '\v^\s*\{\{\/' && prevLine =~# '\v^\s*[^\{\}]+\}\}\s*$')
let ind = ind - sw
endif
" unindent {{else}}
if currentLine =~# '\v^\s*\{\{else'
let ind = ind - sw
endif
" indent again after {{else}}
if prevLine =~# '\v^\s*\{\{else'
let ind = ind + sw
endif
return ind
endfunction
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