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neovim/runtime/indent/html.vim
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" Vim indent script for HTML
" Maintainer: Bram Moolenaar
" Original Author: Andy Wokula <anwoku@yahoo.de>
" Last Change: 2021 Jan 26
" Version: 1.0 "{{{
" Description: HTML indent script with cached state for faster indenting on a
" range of lines.
" Supports template systems through hooks.
" Supports Closure stylesheets.
"
" Credits:
" indent/html.vim (2006 Jun 05) from J. Zellner
" indent/css.vim (2006 Dec 20) from N. Weibull
"
" History:
" 2014 June (v1.0) overhaul (Bram)
" 2012 Oct 21 (v0.9) added support for shiftwidth()
" 2011 Sep 09 (v0.8) added HTML5 tags (thx to J. Zuckerman)
" 2008 Apr 28 (v0.6) revised customization
" 2008 Mar 09 (v0.5) fixed 'indk' issue (thx to C.J. Robinson)
"}}}
" Init Folklore, check user settings (2nd time ++)
if exists("b:did_indent") "{{{
finish
endif
" Load the Javascript indent script first, it defines GetJavascriptIndent().
" Undo the rest.
" Load base python indent.
if !exists('*GetJavascriptIndent')
runtime! indent/javascript.vim
endif
let b:did_indent = 1
setlocal indentexpr=HtmlIndent()
setlocal indentkeys=o,O,<Return>,<>>,{,},!^F
" Needed for % to work when finding start/end of a tag.
setlocal matchpairs+=<:>
let b:undo_indent = "setlocal inde< indk<"
" b:hi_indent keeps state to speed up indenting consecutive lines.
let b:hi_indent = {"lnum": -1}
"""""" Code below this is loaded only once. """""
if exists("*HtmlIndent") && !exists('g:force_reload_html')
call HtmlIndent_CheckUserSettings()
finish
endif
" Allow for line continuation below.
let s:cpo_save = &cpo
set cpo-=C
"}}}
" Pattern to match the name of a tag, including custom elements.
let s:tagname = '\w\+\(-\w\+\)*'
" Check and process settings from b:html_indent and g:html_indent... variables.
" Prefer using buffer-local settings over global settings, so that there can
" be defaults for all HTML files and exceptions for specific types of HTML
" files.
func! HtmlIndent_CheckUserSettings()
"{{{
let inctags = ''
if exists("b:html_indent_inctags")
let inctags = b:html_indent_inctags
elseif exists("g:html_indent_inctags")
let inctags = g:html_indent_inctags
endif
let b:hi_tags = {}
if len(inctags) > 0
call s:AddITags(b:hi_tags, split(inctags, ","))
endif
let autotags = ''
if exists("b:html_indent_autotags")
let autotags = b:html_indent_autotags
elseif exists("g:html_indent_autotags")
let autotags = g:html_indent_autotags
endif
let b:hi_removed_tags = {}
if len(autotags) > 0
call s:RemoveITags(b:hi_removed_tags, split(autotags, ","))
endif
" Syntax names indicating being inside a string of an attribute value.
let string_names = []
if exists("b:html_indent_string_names")
let string_names = b:html_indent_string_names
elseif exists("g:html_indent_string_names")
let string_names = g:html_indent_string_names
endif
let b:hi_insideStringNames = ['htmlString']
if len(string_names) > 0
for s in string_names
call add(b:hi_insideStringNames, s)
endfor
endif
" Syntax names indicating being inside a tag.
let tag_names = []
if exists("b:html_indent_tag_names")
let tag_names = b:html_indent_tag_names
elseif exists("g:html_indent_tag_names")
let tag_names = g:html_indent_tag_names
endif
let b:hi_insideTagNames = ['htmlTag', 'htmlScriptTag']
if len(tag_names) > 0
for s in tag_names
call add(b:hi_insideTagNames, s)
endfor
endif
let indone = {"zero": 0
\,"auto": "indent(prevnonblank(v:lnum-1))"
\,"inc": "b:hi_indent.blocktagind + shiftwidth()"}
let script1 = ''
if exists("b:html_indent_script1")
let script1 = b:html_indent_script1
elseif exists("g:html_indent_script1")
let script1 = g:html_indent_script1
endif
if len(script1) > 0
let b:hi_js1indent = get(indone, script1, indone.zero)
else
let b:hi_js1indent = 0
endif
let style1 = ''
if exists("b:html_indent_style1")
let style1 = b:html_indent_style1
elseif exists("g:html_indent_style1")
let style1 = g:html_indent_style1
endif
if len(style1) > 0
let b:hi_css1indent = get(indone, style1, indone.zero)
else
let b:hi_css1indent = 0
endif
if !exists('b:html_indent_line_limit')
if exists('g:html_indent_line_limit')
let b:html_indent_line_limit = g:html_indent_line_limit
else
let b:html_indent_line_limit = 200
endif
endif
endfunc "}}}
" Init Script Vars
"{{{
let b:hi_lasttick = 0
let b:hi_newstate = {}
let s:countonly = 0
"}}}
" Fill the s:indent_tags dict with known tags.
" The key is "tagname" or "/tagname". {{{
" The value is:
" 1 opening tag
" 2 "pre"
" 3 "script"
" 4 "style"
" 5 comment start
" 6 conditional comment start
" -1 closing tag
" -2 "/pre"
" -3 "/script"
" -4 "/style"
" -5 comment end
" -6 conditional comment end
let s:indent_tags = {}
let s:endtags = [0,0,0,0,0,0,0] " long enough for the highest index
"}}}
" Add a list of tag names for a pair of <tag> </tag> to "tags".
func! s:AddITags(tags, taglist)
"{{{
for itag in a:taglist
let a:tags[itag] = 1
let a:tags['/' . itag] = -1
endfor
endfunc "}}}
" Take a list of tag name pairs that are not to be used as tag pairs.
func! s:RemoveITags(tags, taglist)
"{{{
for itag in a:taglist
let a:tags[itag] = 1
let a:tags['/' . itag] = 1
endfor
endfunc "}}}
" Add a block tag, that is a tag with a different kind of indenting.
func! s:AddBlockTag(tag, id, ...)
"{{{
if !(a:id >= 2 && a:id < len(s:endtags))
echoerr 'AddBlockTag ' . a:id
return
endif
let s:indent_tags[a:tag] = a:id
if a:0 == 0
let s:indent_tags['/' . a:tag] = -a:id
let s:endtags[a:id] = "</" . a:tag . ">"
else
let s:indent_tags[a:1] = -a:id
let s:endtags[a:id] = a:1
endif
endfunc "}}}
" Add known tag pairs.
" Self-closing tags and tags that are sometimes {{{
" self-closing (e.g., <p>) are not here (when encountering </p> we can find
" the matching <p>, but not the other way around).
" Known self-closing tags: " 'p', 'img', 'source', 'area', 'keygen', 'track',
" 'wbr'.
" Old HTML tags:
call s:AddITags(s:indent_tags, [
\ 'a', 'abbr', 'acronym', 'address', 'b', 'bdo', 'big',
\ 'blockquote', 'body', 'button', 'caption', 'center', 'cite', 'code',
\ 'colgroup', 'dd', 'del', 'dfn', 'dir', 'div', 'dl', 'dt', 'em', 'fieldset', 'font',
\ 'form', 'frameset', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'html',
\ 'i', 'iframe', 'ins', 'kbd', 'label', 'legend', 'li',
\ 'map', 'menu', 'noframes', 'noscript', 'object', 'ol',
\ 'optgroup', 'q', 's', 'samp', 'select', 'small', 'span', 'strong', 'sub',
\ 'sup', 'table', 'textarea', 'title', 'tt', 'u', 'ul', 'var', 'th', 'td',
\ 'tr', 'tbody', 'tfoot', 'thead'])
" New HTML5 elements:
call s:AddITags(s:indent_tags, [
\ 'article', 'aside', 'audio', 'bdi', 'canvas', 'command', 'data',
\ 'datalist', 'details', 'dialog', 'embed', 'figcaption', 'figure',
\ 'footer', 'header', 'hgroup', 'main', 'mark', 'meter', 'nav', 'output',
\ 'picture', 'progress', 'rp', 'rt', 'ruby', 'section', 'summary',
\ 'svg', 'time', 'video'])
" Tags added for web components:
call s:AddITags(s:indent_tags, [
\ 'content', 'shadow', 'template'])
"}}}
" Add Block Tags: these contain alien content
"{{{
call s:AddBlockTag('pre', 2)
call s:AddBlockTag('script', 3)
call s:AddBlockTag('style', 4)
call s:AddBlockTag('<!--', 5, '-->')
call s:AddBlockTag('<!--[', 6, '![endif]-->')
"}}}
" Return non-zero when "tagname" is an opening tag, not being a block tag, for
" which there should be a closing tag. Can be used by scripts that include
" HTML indenting.
func! HtmlIndent_IsOpenTag(tagname)
"{{{
if get(s:indent_tags, a:tagname) == 1
return 1
endif
return get(b:hi_tags, a:tagname) == 1
endfunc "}}}
" Get the value for "tagname", taking care of buffer-local tags.
func! s:get_tag(tagname)
"{{{
let i = get(s:indent_tags, a:tagname)
if (i == 1 || i == -1) && get(b:hi_removed_tags, a:tagname) != 0
return 0
endif
if i == 0
let i = get(b:hi_tags, a:tagname)
endif
return i
endfunc "}}}
" Count the number of start and end tags in "text".
func! s:CountITags(text)
"{{{
" Store the result in s:curind and s:nextrel.
let s:curind = 0 " relative indent steps for current line [unit &sw]:
let s:nextrel = 0 " relative indent steps for next line [unit &sw]:
let s:block = 0 " assume starting outside of a block
let s:countonly = 1 " don't change state
call substitute(a:text, '<\zs/\=' . s:tagname . '\>\|<!--\[\|\[endif\]-->\|<!--\|-->', '\=s:CheckTag(submatch(0))', 'g')
let s:countonly = 0
endfunc "}}}
" Count the number of start and end tags in text.
func! s:CountTagsAndState(text)
"{{{
" Store the result in s:curind and s:nextrel. Update b:hi_newstate.block.
let s:curind = 0 " relative indent steps for current line [unit &sw]:
let s:nextrel = 0 " relative indent steps for next line [unit &sw]:
let s:block = b:hi_newstate.block
let tmp = substitute(a:text, '<\zs/\=' . s:tagname . '\>\|<!--\[\|\[endif\]-->\|<!--\|-->', '\=s:CheckTag(submatch(0))', 'g')
if s:block == 3
let b:hi_newstate.scripttype = s:GetScriptType(matchstr(tmp, '\C.*<SCRIPT\>\zs[^>]*'))
endif
let b:hi_newstate.block = s:block
endfunc "}}}
" Used by s:CountITags() and s:CountTagsAndState().
func! s:CheckTag(itag)
"{{{
" Returns an empty string or "SCRIPT".
" a:itag can be "tag" or "/tag" or "<!--" or "-->"
if (s:CheckCustomTag(a:itag))
return ""
endif
let ind = s:get_tag(a:itag)
if ind == -1
" closing tag
if s:block != 0
" ignore itag within a block
return ""
endif
if s:nextrel == 0
let s:curind -= 1
else
let s:nextrel -= 1
endif
elseif ind == 1
" opening tag
if s:block != 0
return ""
endif
let s:nextrel += 1
elseif ind != 0
" block-tag (opening or closing)
return s:CheckBlockTag(a:itag, ind)
" else ind==0 (other tag found): keep indent
endif
return ""
endfunc "}}}
" Used by s:CheckTag(). Returns an empty string or "SCRIPT".
func! s:CheckBlockTag(blocktag, ind)
"{{{
if a:ind > 0
" a block starts here
if s:block != 0
" already in a block (nesting) - ignore
" especially ignore comments after other blocktags
return ""
endif
let s:block = a:ind " block type
if s:countonly
return ""
endif
let b:hi_newstate.blocklnr = v:lnum
" save allover indent for the endtag
let b:hi_newstate.blocktagind = b:hi_indent.baseindent + (s:nextrel + s:curind) * shiftwidth()
if a:ind == 3
return "SCRIPT" " all except this must be lowercase
" line is to be checked again for the type attribute
endif
else
let s:block = 0
" we get here if starting and closing a block-tag on the same line
endif
return ""
endfunc "}}}
" Used by s:CheckTag().
func! s:CheckCustomTag(ctag)
"{{{
" Returns 1 if ctag is the tag for a custom element, 0 otherwise.
" a:ctag can be "tag" or "/tag" or "<!--" or "-->"
let pattern = '\%\(\w\+-\)\+\w\+'
if match(a:ctag, pattern) == -1
return 0
endif
if matchstr(a:ctag, '\/\ze.\+') == "/"
" closing tag
if s:block != 0
" ignore ctag within a block
return 1
endif
if s:nextrel == 0
let s:curind -= 1
else
let s:nextrel -= 1
endif
else
" opening tag
if s:block != 0
return 1
endif
let s:nextrel += 1
endif
return 1
endfunc "}}}
" Return the <script> type: either "javascript" or ""
func! s:GetScriptType(str)
"{{{
if a:str == "" || a:str =~ "java"
return "javascript"
else
return ""
endif
endfunc "}}}
" Look back in the file, starting at a:lnum - 1, to compute a state for the
" start of line a:lnum. Return the new state.
func! s:FreshState(lnum)
"{{{
" A state is to know ALL relevant details about the
" lines 1..a:lnum-1, initial calculating (here!) can be slow, but updating is
" fast (incremental).
" TODO: this should be split up in detecting the block type and computing the
" indent for the block type, so that when we do not know the indent we do
" not need to clear the whole state and re-detect the block type again.
" State:
" lnum last indented line == prevnonblank(a:lnum - 1)
" block = 0 a:lnum located within special tag: 0:none, 2:<pre>,
" 3:<script>, 4:<style>, 5:<!--, 6:<!--[
" baseindent use this indent for line a:lnum as a start - kind of
" autoindent (if block==0)
" scripttype = '' type attribute of a script tag (if block==3)
" blocktagind indent for current opening (get) and closing (set)
" blocktag (if block!=0)
" blocklnr lnum of starting blocktag (if block!=0)
" inattr line {lnum} starts with attributes of a tag
let state = {}
let state.lnum = prevnonblank(a:lnum - 1)
let state.scripttype = ""
let state.blocktagind = -1
let state.block = 0
let state.baseindent = 0
let state.blocklnr = 0
let state.inattr = 0
if state.lnum == 0
return state
endif
" Heuristic:
" remember startline state.lnum
" look back for <pre, </pre, <script, </script, <style, </style tags
" remember stopline
" if opening tag found,
" assume a:lnum within block
" else
" look back in result range (stopline, startline) for comment
" \ delimiters (<!--, -->)
" if comment opener found,
" assume a:lnum within comment
" else
" assume usual html for a:lnum
" if a:lnum-1 has a closing comment
" look back to get indent of comment opener
" FI
" look back for a blocktag
let stopline2 = v:lnum + 1
if has_key(b:hi_indent, 'block') && b:hi_indent.block > 5
let [stopline2, stopcol2] = searchpos('<!--', 'bnW')
endif
let [stopline, stopcol] = searchpos('\c<\zs\/\=\%(pre\>\|script\>\|style\>\)', "bnW")
if stopline > 0 && stopline < stopline2
" ugly ... why isn't there searchstr()
let tagline = tolower(getline(stopline))
let blocktag = matchstr(tagline, '\/\=\%(pre\>\|script\>\|style\>\)', stopcol - 1)
if blocktag[0] != "/"
" opening tag found, assume a:lnum within block
let state.block = s:indent_tags[blocktag]
if state.block == 3
let state.scripttype = s:GetScriptType(matchstr(tagline, '\>[^>]*', stopcol))
endif
let state.blocklnr = stopline
" check preceding tags in the line:
call s:CountITags(tagline[: stopcol-2])
let state.blocktagind = indent(stopline) + (s:curind + s:nextrel) * shiftwidth()
return state
elseif stopline == state.lnum
" handle special case: previous line (= state.lnum) contains a
" closing blocktag which is preceded by line-noise;
" blocktag == "/..."
let swendtag = match(tagline, '^\s*</') >= 0
if !swendtag
let [bline, bcol] = searchpos('<'.blocktag[1:].'\>', "bnW")
call s:CountITags(tolower(getline(bline)[: bcol-2]))
let state.baseindent = indent(bline) + (s:curind + s:nextrel) * shiftwidth()
return state
endif
endif
endif
if stopline > stopline2
let stopline = stopline2
let stopcol = stopcol2
endif
" else look back for comment
let [comlnum, comcol, found] = searchpos('\(<!--\[\)\|\(<!--\)\|-->', 'bpnW', stopline)
if found == 2 || found == 3
" comment opener found, assume a:lnum within comment
let state.block = (found == 3 ? 5 : 6)
let state.blocklnr = comlnum
" check preceding tags in the line:
call s:CountITags(tolower(getline(comlnum)[: comcol-2]))
if found == 2
let state.baseindent = b:hi_indent.baseindent
endif
let state.blocktagind = indent(comlnum) + (s:curind + s:nextrel) * shiftwidth()
return state
endif
" else within usual HTML
let text = tolower(getline(state.lnum))
" Check a:lnum-1 for closing comment (we need indent from the opening line).
" Not when other tags follow (might be --> inside a string).
let comcol = stridx(text, '-->')
if comcol >= 0 && match(text, '[<>]', comcol) <= 0
call cursor(state.lnum, comcol + 1)
let [comlnum, comcol] = searchpos('<!--', 'bW')
if comlnum == state.lnum
let text = text[: comcol-2]
else
let text = tolower(getline(comlnum)[: comcol-2])
endif
call s:CountITags(text)
let state.baseindent = indent(comlnum) + (s:curind + s:nextrel) * shiftwidth()
" TODO check tags that follow "-->"
return state
endif
" Check if the previous line starts with end tag.
let swendtag = match(text, '^\s*</') >= 0
" If previous line ended in a closing tag, line up with the opening tag.
if !swendtag && text =~ '</' . s:tagname . '\s*>\s*$'
call cursor(state.lnum, 99999)
normal! F<
let start_lnum = HtmlIndent_FindStartTag()
if start_lnum > 0
let state.baseindent = indent(start_lnum)
if col('.') > 2
" check for tags before the matching opening tag.
let text = getline(start_lnum)
let swendtag = match(text, '^\s*</') >= 0
call s:CountITags(text[: col('.') - 2])
let state.baseindent += s:nextrel * shiftwidth()
if !swendtag
let state.baseindent += s:curind * shiftwidth()
endif
endif
return state
endif
endif
" Else: no comments. Skip backwards to find the tag we're inside.
let [state.lnum, found] = HtmlIndent_FindTagStart(state.lnum)
" Check if that line starts with end tag.
let text = getline(state.lnum)
let swendtag = match(text, '^\s*</') >= 0
call s:CountITags(tolower(text))
let state.baseindent = indent(state.lnum) + s:nextrel * shiftwidth()
if !swendtag
let state.baseindent += s:curind * shiftwidth()
endif
return state
endfunc "}}}
" Indent inside a <pre> block: Keep indent as-is.
func! s:Alien2()
"{{{
return -1
endfunc "}}}
" Return the indent inside a <script> block for javascript.
func! s:Alien3()
"{{{
let lnum = prevnonblank(v:lnum - 1)
while lnum > 1 && getline(lnum) =~ '^\s*/[/*]'
" Skip over comments to avoid that cindent() aligns with the <script> tag
let lnum = prevnonblank(lnum - 1)
endwhile
if lnum == b:hi_indent.blocklnr
" indent for the first line after <script>
return eval(b:hi_js1indent)
endif
if b:hi_indent.scripttype == "javascript"
return eval(b:hi_js1indent) + GetJavascriptIndent()
else
return -1
endif
endfunc "}}}
" Return the indent inside a <style> block.
func! s:Alien4()
"{{{
if prevnonblank(v:lnum-1) == b:hi_indent.blocklnr
" indent for first content line
return eval(b:hi_css1indent)
endif
return s:CSSIndent()
endfunc "}}}
" Indending inside a <style> block. Returns the indent.
func! s:CSSIndent()
"{{{
" This handles standard CSS and also Closure stylesheets where special lines
" start with @.
" When the line starts with '*' or the previous line starts with "/*"
" and does not end in "*/", use C indenting to format the comment.
" Adopted $VIMRUNTIME/indent/css.vim
let curtext = getline(v:lnum)
if curtext =~ '^\s*[*]'
\ || (v:lnum > 1 && getline(v:lnum - 1) =~ '\s*/\*'
\ && getline(v:lnum - 1) !~ '\*/\s*$')
return cindent(v:lnum)
endif
let min_lnum = b:hi_indent.blocklnr
let prev_lnum = s:CssPrevNonComment(v:lnum - 1, min_lnum)
let [prev_lnum, found] = HtmlIndent_FindTagStart(prev_lnum)
if prev_lnum <= min_lnum
" Just below the <style> tag, indent for first content line after comments.
return eval(b:hi_css1indent)
endif
" If the current line starts with "}" align with its match.
if curtext =~ '^\s*}'
call cursor(v:lnum, 1)
try
normal! %
" Found the matching "{", align with it after skipping unfinished lines.
let align_lnum = s:CssFirstUnfinished(line('.'), min_lnum)
return indent(align_lnum)
catch
" can't find it, try something else, but it's most likely going to be
" wrong
endtry
endif
" add indent after {
let brace_counts = HtmlIndent_CountBraces(prev_lnum)
let extra = brace_counts.c_open * shiftwidth()
let prev_text = getline(prev_lnum)
let below_end_brace = prev_text =~ '}\s*$'
" Search back to align with the first line that's unfinished.
let align_lnum = s:CssFirstUnfinished(prev_lnum, min_lnum)
" Handle continuation lines if aligning with previous line and not after a
" "}".
if extra == 0 && align_lnum == prev_lnum && !below_end_brace
let prev_hasfield = prev_text =~ '^\s*[a-zA-Z0-9-]\+:'
let prev_special = prev_text =~ '^\s*\(/\*\|@\)'
if curtext =~ '^\s*\(/\*\|@\)'
" if the current line is not a comment or starts with @ (used by template
" systems) reduce indent if previous line is a continuation line
if !prev_hasfield && !prev_special
let extra = -shiftwidth()
endif
else
let cur_hasfield = curtext =~ '^\s*[a-zA-Z0-9-]\+:'
let prev_unfinished = s:CssUnfinished(prev_text)
if prev_unfinished
" Continuation line has extra indent if the previous line was not a
" continuation line.
let extra = shiftwidth()
" Align with @if
if prev_text =~ '^\s*@if '
let extra = 4
endif
elseif cur_hasfield && !prev_hasfield && !prev_special
" less indent below a continuation line
let extra = -shiftwidth()
endif
endif
endif
if below_end_brace
" find matching {, if that line starts with @ it's not the start of a rule
" but something else from a template system
call cursor(prev_lnum, 1)
call search('}\s*$')
try
normal! %
" Found the matching "{", align with it.
let align_lnum = s:CssFirstUnfinished(line('.'), min_lnum)
let special = getline(align_lnum) =~ '^\s*@'
catch
let special = 0
endtry
if special
" do not reduce indent below @{ ... }
if extra < 0
let extra += shiftwidth()
endif
else
let extra -= (brace_counts.c_close - (prev_text =~ '^\s*}')) * shiftwidth()
endif
endif
" if no extra indent yet...
if extra == 0
if brace_counts.p_open > brace_counts.p_close
" previous line has more ( than ): add a shiftwidth
let extra = shiftwidth()
elseif brace_counts.p_open < brace_counts.p_close
" previous line has more ) than (: subtract a shiftwidth
let extra = -shiftwidth()
endif
endif
return indent(align_lnum) + extra
endfunc "}}}
" Inside <style>: Whether a line is unfinished.
" tag:
" tag: blah
" tag: blah &&
" tag: blah ||
func! s:CssUnfinished(text)
"{{{
return a:text =~ '\(||\|&&\|:\|\k\)\s*$'
endfunc "}}}
" Search back for the first unfinished line above "lnum".
func! s:CssFirstUnfinished(lnum, min_lnum)
"{{{
let align_lnum = a:lnum
while align_lnum > a:min_lnum && s:CssUnfinished(getline(align_lnum - 1))
let align_lnum -= 1
endwhile
return align_lnum
endfunc "}}}
" Find the non-empty line at or before "lnum" that is not a comment.
func! s:CssPrevNonComment(lnum, stopline)
"{{{
" caller starts from a line a:lnum + 1 that is not a comment
let lnum = prevnonblank(a:lnum)
while 1
let ccol = match(getline(lnum), '\*/')
if ccol < 0
" No comment end thus it's something else.
return lnum
endif
call cursor(lnum, ccol + 1)
" Search back for the /* that starts the comment
let lnum = search('/\*', 'bW', a:stopline)
if indent(".") == virtcol(".") - 1
" The found /* is at the start of the line. Now go back to the line
" above it and again check if it is a comment.
let lnum = prevnonblank(lnum - 1)
else
" /* is after something else, thus it's not a comment line.
return lnum
endif
endwhile
endfunc "}}}
" Check the number of {} and () in line "lnum". Return a dict with the counts.
func! HtmlIndent_CountBraces(lnum)
"{{{
let brs = substitute(getline(a:lnum), '[''"].\{-}[''"]\|/\*.\{-}\*/\|/\*.*$\|[^{}()]', '', 'g')
let c_open = 0
let c_close = 0
let p_open = 0
let p_close = 0
for brace in split(brs, '\zs')
if brace == "{"
let c_open += 1
elseif brace == "}"
if c_open > 0
let c_open -= 1
else
let c_close += 1
endif
elseif brace == '('
let p_open += 1
elseif brace == ')'
if p_open > 0
let p_open -= 1
else
let p_close += 1
endif
endif
endfor
return {'c_open': c_open,
\ 'c_close': c_close,
\ 'p_open': p_open,
\ 'p_close': p_close}
endfunc "}}}
" Return the indent for a comment: <!-- -->
func! s:Alien5()
"{{{
let curtext = getline(v:lnum)
if curtext =~ '^\s*\zs-->'
" current line starts with end of comment, line up with comment start.
call cursor(v:lnum, 0)
let lnum = search('<!--', 'b')
if lnum > 0
" TODO: what if <!-- is not at the start of the line?
return indent(lnum)
endif
" Strange, can't find it.
return -1
endif
let prevlnum = prevnonblank(v:lnum - 1)
let prevtext = getline(prevlnum)
let idx = match(prevtext, '^\s*\zs<!--')
if idx >= 0
" just below comment start, add a shiftwidth
return indent(prevlnum) + shiftwidth()
endif
" Some files add 4 spaces just below a TODO line. It's difficult to detect
" the end of the TODO, so let's not do that.
" Align with the previous non-blank line.
return indent(prevlnum)
endfunc "}}}
" Return the indent for conditional comment: <!--[ ![endif]-->
func! s:Alien6()
"{{{
let curtext = getline(v:lnum)
if curtext =~ '\s*\zs<!\[endif\]-->'
" current line starts with end of comment, line up with comment start.
let lnum = search('<!--', 'bn')
if lnum > 0
return indent(lnum)
endif
endif
return b:hi_indent.baseindent + shiftwidth()
endfunc "}}}
" When the "lnum" line ends in ">" find the line containing the matching "<".
func! HtmlIndent_FindTagStart(lnum)
"{{{
" Avoids using the indent of a continuation line.
" Moves the cursor.
" Return two values:
" - the matching line number or "lnum".
" - a flag indicating whether we found the end of a tag.
" This method is global so that HTML-like indenters can use it.
" To avoid matching " > " or " < " inside a string require that the opening
" "<" is followed by a word character and the closing ">" comes after a
" non-white character.
let idx = match(getline(a:lnum), '\S>\s*$')
if idx > 0
call cursor(a:lnum, idx)
let lnum = searchpair('<\w', '' , '\S>', 'bW', '', max([a:lnum - b:html_indent_line_limit, 0]))
if lnum > 0
return [lnum, 1]
endif
endif
return [a:lnum, 0]
endfunc "}}}
" Find the unclosed start tag from the current cursor position.
func! HtmlIndent_FindStartTag()
"{{{
" The cursor must be on or before a closing tag.
" If found, positions the cursor at the match and returns the line number.
" Otherwise returns 0.
let tagname = matchstr(getline('.')[col('.') - 1:], '</\zs' . s:tagname . '\ze')
let start_lnum = searchpair('<' . tagname . '\>', '', '</' . tagname . '\>', 'bW')
if start_lnum > 0
return start_lnum
endif
return 0
endfunc "}}}
" Moves the cursor from a "<" to the matching ">".
func! HtmlIndent_FindTagEnd()
"{{{
" Call this with the cursor on the "<" of a start tag.
" This will move the cursor to the ">" of the matching end tag or, when it's
" a self-closing tag, to the matching ">".
" Limited to look up to b:html_indent_line_limit lines away.
let text = getline('.')
let tagname = matchstr(text, s:tagname . '\|!--', col('.'))
if tagname == '!--'
call search('--\zs>')
elseif s:get_tag('/' . tagname) != 0
" tag with a closing tag, find matching "</tag>"
call searchpair('<' . tagname, '', '</' . tagname . '\zs>', 'W', '', line('.') + b:html_indent_line_limit)
else
" self-closing tag, find the ">"
call search('\S\zs>')
endif
endfunc "}}}
" Indenting inside a start tag. Return the correct indent or -1 if unknown.
func! s:InsideTag(foundHtmlString)
"{{{
if a:foundHtmlString
" Inside an attribute string.
" Align with the opening quote or use an external function.
let lnum = v:lnum - 1
if lnum > 1
if exists('b:html_indent_tag_string_func')
return b:html_indent_tag_string_func(lnum)
endif
" If there is a double quote in the previous line, indent with the
" character after it.
if getline(lnum) =~ '"'
call cursor(lnum, 0)
normal f"
return virtcol('.')
endif
return indent(lnum)
endif
endif
" Should be another attribute: " attr="val". Align with the previous
" attribute start.
let lnum = v:lnum
while lnum > 1
let lnum -= 1
let text = getline(lnum)
" Find a match with one of these, align with "attr":
" attr=
" <tag attr=
" text<tag attr=
" <tag>text</tag>text<tag attr=
" For long lines search for the first match, finding the last match
" gets very slow.
if len(text) < 300
let idx = match(text, '.*\s\zs[_a-zA-Z0-9-]\+="')
else
let idx = match(text, '\s\zs[_a-zA-Z0-9-]\+="')
endif
if idx == -1
" try <tag attr
let idx = match(text, '<' . s:tagname . '\s\+\zs\w')
endif
if idx == -1
" after just "<tag" indent two levels more
let idx = match(text, '<' . s:tagname . '$')
if idx >= 0
call cursor(lnum, idx + 1)
return virtcol('.') - 1 + shiftwidth() * 2
endif
endif
if idx > 0
" Found the attribute to align with.
call cursor(lnum, idx)
return virtcol('.')
endif
endwhile
return -1
endfunc "}}}
" THE MAIN INDENT FUNCTION. Return the amount of indent for v:lnum.
func! HtmlIndent()
"{{{
if prevnonblank(v:lnum - 1) < 1
" First non-blank line has no indent.
return 0
endif
let curtext = tolower(getline(v:lnum))
let indentunit = shiftwidth()
let b:hi_newstate = {}
let b:hi_newstate.lnum = v:lnum
" When syntax HL is enabled, detect we are inside a tag. Indenting inside
" a tag works very differently. Do not do this when the line starts with
" "<", it gets the "htmlTag" ID but we are not inside a tag then.
if curtext !~ '^\s*<'
normal! ^
let stack = synstack(v:lnum, col('.')) " assumes there are no tabs
let foundHtmlString = 0
for synid in reverse(stack)
let name = synIDattr(synid, "name")
if index(b:hi_insideStringNames, name) >= 0
let foundHtmlString = 1
elseif index(b:hi_insideTagNames, name) >= 0
" Yes, we are inside a tag.
let indent = s:InsideTag(foundHtmlString)
if indent >= 0
" Do not keep the state. TODO: could keep the block type.
let b:hi_indent.lnum = 0
return indent
endif
endif
endfor
endif
" does the line start with a closing tag?
let swendtag = match(curtext, '^\s*</') >= 0
if prevnonblank(v:lnum - 1) == b:hi_indent.lnum && b:hi_lasttick == b:changedtick - 1
" use state (continue from previous line)
else
" start over (know nothing)
let b:hi_indent = s:FreshState(v:lnum)
endif
if b:hi_indent.block >= 2
" within block
let endtag = s:endtags[b:hi_indent.block]
let blockend = stridx(curtext, endtag)
if blockend >= 0
" block ends here
let b:hi_newstate.block = 0
" calc indent for REST OF LINE (may start more blocks):
call s:CountTagsAndState(strpart(curtext, blockend + strlen(endtag)))
if swendtag && b:hi_indent.block != 5
let indent = b:hi_indent.blocktagind + s:curind * indentunit
let b:hi_newstate.baseindent = indent + s:nextrel * indentunit
else
let indent = s:Alien{b:hi_indent.block}()
let b:hi_newstate.baseindent = b:hi_indent.blocktagind + s:nextrel * indentunit
endif
else
" block continues
" indent this line with alien method
let indent = s:Alien{b:hi_indent.block}()
endif
else
" not within a block - within usual html
let b:hi_newstate.block = b:hi_indent.block
if swendtag
" The current line starts with an end tag, align with its start tag.
call cursor(v:lnum, 1)
let start_lnum = HtmlIndent_FindStartTag()
if start_lnum > 0
" check for the line starting with something inside a tag:
" <sometag <- align here
" attr=val><open> not here
let text = getline(start_lnum)
let angle = matchstr(text, '[<>]')
if angle == '>'
call cursor(start_lnum, 1)
normal! f>%
let start_lnum = line('.')
let text = getline(start_lnum)
endif
let indent = indent(start_lnum)
if col('.') > 2
let swendtag = match(text, '^\s*</') >= 0
call s:CountITags(text[: col('.') - 2])
let indent += s:nextrel * shiftwidth()
if !swendtag
let indent += s:curind * shiftwidth()
endif
endif
else
" not sure what to do
let indent = b:hi_indent.baseindent
endif
let b:hi_newstate.baseindent = indent
else
call s:CountTagsAndState(curtext)
let indent = b:hi_indent.baseindent
let b:hi_newstate.baseindent = indent + (s:curind + s:nextrel) * indentunit
endif
endif
let b:hi_lasttick = b:changedtick
call extend(b:hi_indent, b:hi_newstate, "force")
return indent
endfunc "}}}
" Check user settings when loading this script the first time.
call HtmlIndent_CheckUserSettings()
let &cpo = s:cpo_save
unlet s:cpo_save
" vim: fdm=marker ts=8 sw=2 tw=78
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