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Editing: html.vim
" Vim indent script for HTML " Header: "{{{ " Maintainer: Bram Moolenaar " Original Author: Andy Wokula <anwoku@yahoo.de> " Last Change: 2018 Mar 28 " 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'. " Old HTML tags: call s:AddITags(s:indent_tags, [ \ 'a', 'abbr', 'acronym', 'address', 'b', 'bdo', 'big', \ 'blockquote', 'body', 'button', 'caption', 'center', 'cite', 'code', \ 'colgroup', 'del', 'dfn', 'dir', 'div', 'dl', '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, [ \ 'area', 'article', 'aside', 'audio', 'bdi', 'canvas', \ 'command', 'data', 'datalist', 'details', 'embed', 'figcaption', \ 'figure', 'footer', 'header', 'keygen', 'main', 'mark', 'meter', \ 'nav', 'output', 'picture', 'progress', 'rp', 'rt', 'ruby', 'section', \ 'summary', 'svg', 'time', 'track', 'video', 'wbr']) " 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 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 it's 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 !cur_hasfield && (prev_hasfield || 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. func! s:CssUnfinished(text) "{{{ return a:text =~ '\s\(||\|&&\|:\)\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 idx + 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 previous line 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 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 one level more let idx = match(text, '<' . s:tagname . '$') if idx >= 0 call cursor(lnum, idx) return virtcol('.') + shiftwidth() 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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