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" Language: xml
" Repository: https://github.com/chrisbra/vim-xml-ftplugin
" Last Changed: Jan 28, 2019
" Maintainer: Christian Brabandt <cb@256bit.org>
" Previous Maintainer: Johannes Zellner <johannes@zellner.org>
" Last Change:
" 20190128 - Make sure to find previous tag
" https://github.com/chrisbra/vim-xml-ftplugin/issues/4
" 20181116 - Fix indentation when tags start with a colon or an underscore
" https://github.com/vim/vim/pull/926
" 20181022 - Do not overwrite indentkeys setting
" https://github.com/chrisbra/vim-xml-ftplugin/issues/1
" 20180724 - Correctly indent xml comments https://github.com/vim/vim/issues/3200
"
" Notes:
" 1) does not indent pure non-xml code (e.g. embedded scripts)
" 2) will be confused by unbalanced tags in comments
" or CDATA sections.
" 2009-05-26 patch by Nikolai Weibull
" TODO: implement pre-like tags, see xml_indent_open / xml_indent_close
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
let s:keepcpo= &cpo
set cpo&vim
" [-- local settings (must come before aborting the script) --]
" Attention: Parameter use_syntax_check is used by the docbk.vim indent script
setlocal indentexpr=XmlIndentGet(v:lnum,1)
setlocal indentkeys=o,O,*<Return>,<>>,<<>,/,{,},!^F
if !exists('b:xml_indent_open')
let b:xml_indent_open = '.\{-}<[:A-Z_a-z]'
" pre tag, e.g. <address>
" let b:xml_indent_open = '.\{-}<[/]\@!\(address\)\@!'
endif
if !exists('b:xml_indent_close')
let b:xml_indent_close = '.\{-}</'
" end pre tag, e.g. </address>
" let b:xml_indent_close = '.\{-}</\(address\)\@!'
endif
let &cpo = s:keepcpo
unlet s:keepcpo
" [-- finish, if the function already exists --]
if exists('*XmlIndentGet')
finish
endif
let s:keepcpo= &cpo
set cpo&vim
fun! <SID>XmlIndentWithPattern(line, pat)
let s = substitute('x'.a:line, a:pat, "\1", 'g')
return strlen(substitute(s, "[^\1].*$", '', ''))
endfun
" [-- check if it's xml --]
fun! <SID>XmlIndentSynCheck(lnum)
if &syntax != ''
let syn1 = synIDattr(synID(a:lnum, 1, 1), 'name')
let syn2 = synIDattr(synID(a:lnum, strlen(getline(a:lnum)) - 1, 1), 'name')
if syn1 != '' && syn1 !~ 'xml' && syn2 != '' && syn2 !~ 'xml'
" don't indent pure non-xml code
return 0
endif
endif
return 1
endfun
" [-- return the sum of indents of a:lnum --]
fun! <SID>XmlIndentSum(lnum, style, add)
let line = getline(a:lnum)
if a:style == match(line, '^\s*</')
return (shiftwidth() *
\ (<SID>XmlIndentWithPattern(line, b:xml_indent_open)
\ - <SID>XmlIndentWithPattern(line, b:xml_indent_close)
\ - <SID>XmlIndentWithPattern(line, '.\{-}/>'))) + a:add
else
return a:add
endif
endfun
" Main indent function
fun! XmlIndentGet(lnum, use_syntax_check)
" Find a non-empty line above the current line.
let plnum = prevnonblank(a:lnum - 1)
" Hit the start of the file, use zero indent.
if plnum == 0
return 0
endif
" Find previous line with a tag (regardless whether open or closed,
" but always start restrict the match to a line before the current one
let ptag_pattern = '\%(.\{-}<[/:A-Z_a-z]\)'. '\%(\&\%<'. line('.').'l\)'
let ptag = search(ptag_pattern, 'bnw')
let syn_name = ''
if a:use_syntax_check
let check_lnum = <SID>XmlIndentSynCheck(plnum)
let check_alnum = <SID>XmlIndentSynCheck(a:lnum)
if check_lnum == 0 || check_alnum == 0
return indent(a:lnum)
endif
let syn_name = synIDattr(synID(a:lnum, strlen(getline(a:lnum)) - 1, 1), 'name')
endif
if syn_name =~ 'Comment'
return <SID>XmlIndentComment(a:lnum)
endif
" Get indent from previous tag line
let ind = <SID>XmlIndentSum(ptag, -1, indent(ptag))
" Determine indent from current line
let ind = <SID>XmlIndentSum(a:lnum, 0, ind)
return ind
endfun
" return indent for a commented line,
" the middle part might be indented on additional level
func! <SID>XmlIndentComment(lnum)
let ptagopen = search(b:xml_indent_open, 'bnw')
let ptagclose = search(b:xml_indent_close, 'bnw')
if getline(a:lnum) =~ '<!--'
" if previous tag was a closing tag, do not add
" one additional level of indent
if ptagclose > ptagopen && a:lnum > ptagclose
return indent(ptagclose)
else
" start of comment, add one indentation level
return indent(ptagopen) + shiftwidth()
endif
elseif getline(a:lnum) =~ '-->'
" end of comment, same as start of comment
return indent(search('<!--', 'bnw'))
else
" middle part of comment, add one additional level
return indent(search('<!--', 'bnw')) + shiftwidth()
endif
endfunc
let &cpo = s:keepcpo
unlet s:keepcpo
" vim:ts=4 et sts=-1 sw=0
|
