diff options
Diffstat (limited to 'runtime/indent/html.vim')
| -rw-r--r-- | runtime/indent/html.vim | 1094 |
1 files changed, 1094 insertions, 0 deletions
diff --git a/runtime/indent/html.vim b/runtime/indent/html.vim new file mode 100644 index 0000000..65e0ffc --- /dev/null +++ b/runtime/indent/html.vim @@ -0,0 +1,1094 @@ +" Vim indent script for HTML +" Maintainer: Bram Moolenaar +" Original Author: Andy Wokula <anwoku@yahoo.de> +" Last Change: 2022 Jan 31 +" 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 + + if exists('b:html_indent_attribute') + let b:hi_attr_indent = b:html_indent_attribute + elseif exists('g:html_indent_attribute') + let b:hi_attr_indent = g:html_indent_attribute + else + let b:hi_attr_indent = 2 + 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 <script> itself + return b:hi_indent.blocktagind + endif + 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" + " indent for further lines + 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 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 by default + let idx = match(text, '<' . s:tagname . '$') + if idx >= 0 + call cursor(lnum, idx + 1) + return virtcol('.') - 1 + shiftwidth() * b:hi_attr_indent + 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 |