Module: IsoDoc::HtmlFunction::Html

Included in:
IsoDoc::HeadlessHtmlConvert, IsoDoc::HtmlConvert, PdfConvert
Defined in:
lib/isodoc/html_function/html.rb,
lib/isodoc/html_function/postprocess.rb,
lib/isodoc/html_function/postprocess_cover.rb,
lib/isodoc/html_function/postprocess_footnotes.rb

Constant Summary collapse

MATHJAX_ADDR = 
"https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/latest.js".freeze
MATHJAX = 
<<~"MATHJAX".freeze
  <script type="text/x-mathjax-config">
    MathJax.Hub.Config({
      "HTML-CSS": { preferredFont: "STIX" },
      asciimath2jax: { delimiters: [['OPEN', 'CLOSE']] }
   });
  </script>
  <script src="#{MATHJAX_ADDR}?config=MML_HTMLorMML-full" async="async"></script>
MATHJAX

Instance Method Summary collapse

Instance Method Details

#authority_cleanup(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 62

def authority_cleanup(docxml)
  %w(copyright license legal feedback).each do |t|
    authority_cleanup1(docxml, t)
  end
  coverpage_note_cleanup(docxml)
end

#authority_cleanup1(docxml, klass) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 53

def authority_cleanup1(docxml, klass)
  dest = docxml.at("//div[@id = 'boilerplate-#{klass}-destination']")
  auth = docxml.at("//div[@id = 'boilerplate-#{klass}' or " \
                   "@class = 'boilerplate-#{klass}']")
  auth&.xpath(".//h1[not(text())] | .//h2[not(text())]")&.each(&:remove)
  auth&.xpath(".//h1 | .//h2")&.each { |h| h["class"] = "IntroTitle" }
  dest and auth and dest.replace(auth.remove)
end

#convert1(docxml, filename, dir) ⇒ Object 



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# File 'lib/isodoc/html_function/html.rb', line 7

def convert1(docxml, filename, dir)
  noko do |xml|
    xml.html lang: @lang.to_s do |html|
      info docxml, nil
      populate_css
      html.head { |head| define_head head, filename, dir }
      make_body(html, docxml)
    end
  end.join("\n")
end

#coverpage_note_cleanup(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 69

def coverpage_note_cleanup(docxml)
  if dest = docxml.at("//div[@id = 'coverpage-note-destination']")
    auth = docxml.xpath("//*[@coverpage]")
    if auth.empty? then dest.remove
    else
      auth.each do |x|
        dest << x.remove
      end
    end
  end
  docxml.xpath("//*[@coverpage]").each { |x| x.delete("coverpage") }
end

#datauri(img) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 104

def datauri(img)
  img["src"] = Vectory::Utils::datauri(img["src"], @localdir)
end

#footnote_backlinks(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_footnotes.rb', line 40

def footnote_backlinks(docxml)
  seen = {}
  docxml.xpath('//a[@class = "FootnoteRef"]').each_with_index do |x, i|
    (seen[x["href"]] and next) or seen[x["href"]] = true
    fn = docxml.at(%<//*[@id = '#{x['href'].sub(/^#/, '')}']>) || next
    footnote_backlinks1(x, fn)
    x["id"] ||= "fnref:#{i + 1}"
    fn.add_child "<a href='##{x['id']}'>&#x21A9;</a>"
  end
  docxml
end

#footnote_backlinks1(xref, footnote) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_footnotes.rb', line 27

def footnote_backlinks1(xref, footnote)
  xdup = xref.dup
  xdup.remove["id"]
  if footnote.elements.empty?
    #footnote.children.empty? and footnote << " "
    #footnote.children.first.previous = xdup
    footnote.add_first_child xdup
  else
    #footnote.elements.first.children.first.previous = xdup
    footnote.elements.first.add_first_child xdup
  end
end

#footnote_format(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_footnotes.rb', line 52

def footnote_format(docxml)
  docxml.xpath("//a[@class = 'FootnoteRef']/sup").each do |x|
    footnote_reference_format(x)
  end
  docxml.xpath("//a[@class = 'TableFootnoteRef'] | "\
               "//span[@class = 'TableFootnoteRef']").each do |x|
    table_footnote_reference_format(x)
  end
  docxml
end

#googlefonts ⇒ Object 



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# File 'lib/isodoc/html_function/html.rb', line 36

def googlefonts
  <<~HEAD.freeze
    <link href="https://fonts.googleapis.com/css?family=Overpass:300,300i,600,900" rel="stylesheet"/>
    <link href="https://fonts.googleapis.com/css?family=Lato:400,400i,700,900" rel="stylesheet"/>
  HEAD
end

#heading_anchor(hdr, id) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 45

def heading_anchor(hdr, id)
  hdr.children = <<~HTML.strip
    <a class='anchor' href='##{id}'/><a class='header' href='##{id}'>#{hdr.children.to_xml}</a>
  HTML
end

#heading_anchors(html) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 34

def heading_anchors(html)
  html.xpath("//h1 | //h2 | //h3 | //h4 | //h5 | //h6 | //h7 | //h8 "\
             "//span[@class = 'inline-header']").each do |h|
    h.at("./ancestor::div[@id='toc']") and next
    div = h.xpath("./ancestor::div[@id]")
    div.empty? and next
    heading_anchor(h, div[-1]["id"])
  end
  html
end

#html5(doc) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 22

def html5(doc)
  doc.sub(%r{<!DOCTYPE html [^<>]+>}, "<!DOCTYPE html>")
    .sub(%r{<\?xml[^<>]+>}, "")
end

#html_button ⇒ Object 



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# File 'lib/isodoc/html_function/html.rb', line 62

def html_button
  return "" if @bare

  '<button onclick="topFunction()" id="myBtn" ' \
  'title="Go to top">Top</button>'.freeze
end

#html_cleanup(html) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 27

def html_cleanup(html)
  html = term_header(html_footnote_filter(html_preface(htmlstyle(html))))
  html = footnote_format(footnote_backlinks(html))
  html = mathml(html_list_clean(remove_placeholder_paras(html)))
  html_toc(heading_anchors(sourcecode_cleanup(html)))
end

#html_cover(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 82

def html_cover(docxml)
  doc = to_xhtml_fragment(File.read(@htmlcoverpage, encoding: "UTF-8"))
  d = docxml.at('//div[@class="title-section"]')
  #d.children.first.add_previous_sibling(
  d.add_first_child(
    populate_template(doc.to_xml(encoding: "US-ASCII"), :html),
  )
end

#html_footnote_filter(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_footnotes.rb', line 17

def html_footnote_filter(docxml)
  seen = {}
  i = 1
  docxml.xpath('//a[@class = "FootnoteRef"]').each do |x|
    fn = docxml.at(%<//*[@id = '#{x['href'].sub(/^#/, '')}']>) || next
    i, seen = update_footnote_filter(fn, x, i, seen)
  end
  docxml
end

#html_head ⇒ Object 



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# File 'lib/isodoc/html_function/html.rb', line 43

def html_head
  <<~HEAD.freeze
    <title>#{@meta&.get&.dig(:doctitle)}</title>
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

    <!--TOC script import-->
    <script type="text/javascript"  src="https://cdn.rawgit.com/jgallen23/toc/0.3.2/dist/toc.min.js"></script>
    <script type="text/javascript">#{toclevel}</script>

    <!--Google fonts-->
    <link rel="preconnect" href="https://fonts.gstatic.com"/>
    #{googlefonts}
    <!--Font awesome import for the link icon-->
    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.8/css/solid.css" integrity="sha384-v2Tw72dyUXeU3y4aM2Y0tBJQkGfplr39mxZqlTBDUZAb9BGoC40+rdFCG0m10lXk" crossorigin="anonymous"/>
    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.8/css/fontawesome.css" integrity="sha384-q3jl8XQu1OpdLgGFvNRnPdj5VIlCvgsDQTQB6owSOHWlAurxul7f+JpUOVdAiJ5P" crossorigin="anonymous"/>
    <style class="anchorjs"></style>
  HEAD
end

#html_intro(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 91

def html_intro(docxml)
  doc = to_xhtml_fragment(File.read(@htmlintropage, encoding: "UTF-8"))
  d = docxml.at('//div[@class="prefatory-section"]')
  #d.children.first.add_previous_sibling(
  d.add_first_child(
    populate_template(doc.to_xml(encoding: "US-ASCII"), :html),
  )
end

#html_list_clean(html) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 70

def html_list_clean(html)
  html.xpath("//ol/div | //ul/div").each do |div|
    li = div.xpath("./preceding-sibling::li")&.last ||
      div.at("./following-sibling::li")
    div.parent = li
  end
  html
end

#html_main(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/html.rb', line 69

def html_main(docxml)
  docxml.at("//head").add_child(html_head)
  d = docxml.at('//div[@class="main-section"]')
  d.name = "main"
  d.children.empty? or d.children.first.previous = html_button
end

#html_preface(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 42

def html_preface(docxml)
  @htmlcoverpage && !@htmlcoverpage.empty? && !@bare and
    html_cover(docxml)
  @htmlintropage && !@htmlintropage.empty? && !@bare and
    html_intro(docxml)
  docxml.at("//body") << mathjax(@openmathdelim, @closemathdelim)
  html_main(docxml)
  authority_cleanup(docxml)
  docxml
end

#html_toc(docxml) ⇒ Object

needs to be same output as toclevel



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 125

def html_toc(docxml)
  idx = html_toc_init(docxml) or return docxml
  path = toclevel_classes.map do |x|
    x.map { |l| "//main//#{l}#{toc_exclude_class}" }
  end
  toc = html_toc_entries(docxml, path)
    .map { |k| k[:entry] }.join("\n")
  idx << "<ul>#{toc}</ul>"
  docxml
end

#html_toc_entries(docxml, path) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 144

def html_toc_entries(docxml, path)
  headers = html_toc_entries_prep(docxml, path)
  path.each_with_index.with_object([]) do |(p, i), m|
    docxml.xpath(p.join(" | ")).each do |h|
      m << { entry: html_toc_entry("h#{i + 1}", h),
             line: headers[h["id"]] }
    end
  end.sort_by { |k| k[:line] }
end

#html_toc_entries_prep(docxml, path) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 154

def html_toc_entries_prep(docxml, path)
  docxml.xpath(path.join(" | "))
    .each_with_index.with_object({}) do |(h, i), m|
      h["id"] ||= "_#{UUIDTools::UUID.random_create}"
      m[h["id"]] = i
    end
end

#html_toc_entry(level, header) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 100

def html_toc_entry(level, header)
  content = header.at("./following-sibling::p" \
                      "[@class = 'variant-title-toc']") || header
  id = header.at(".//a[@class = 'anchor']/@href")&.text&.sub(/^#/, "") ||
    header["id"]
  %(<li class="#{level}"><a href="##{id}">\
#{header_strip(content)}</a></li>)
end

#html_toc_init(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 136

def html_toc_init(docxml)
  dest = docxml.at("//div[@id = 'toc']") or return
  if source = docxml.at("//div[@class = 'TOC']")
    dest << to_xml(source.remove.children)
  end
  dest
end

#htmlstyle(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 28

def htmlstyle(docxml)
  return docxml unless @htmlstylesheet

  head = docxml.at("//*[local-name() = 'head']")
  head << htmlstylesheet(@htmlstylesheet)
  s = htmlstylesheet(@htmlstylesheet_override) and head << s
  s = @meta.get[:code_css] and
    head << "<style><!--#{s.gsub(/sourcecode/,
                                 'pre.sourcecode')}--></style>"
  @bare and
    head << "<style>body {margin-left: 2em; margin-right: 2em;}</style>"
  docxml
end

#htmlstylesheet(file) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 15

def htmlstylesheet(file)
  return if file.nil?

  file.open if file.is_a?(Tempfile)
  stylesheet = file.read
  xml = Nokogiri::XML("<style/>")
  xml.children.first << Nokogiri::XML::Comment
    .new(xml, "\n#{stylesheet}\n")
  file.close
  file.unlink if file.is_a?(Tempfile)
  xml.root.to_s
end

#image_body_parse(node, attrs, out) ⇒ Object 



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# File 'lib/isodoc/html_function/html.rb', line 101

def image_body_parse(node, attrs, out)
  if svg = node.at("./m:svg", "m" => "http://www.w3.org/2000/svg")
    %i(height width).each do |k|
      v = attrs[k] and v != "auto" and !v.empty? and
        svg[k.to_s] = v
    end
    out.parent.add_child(svg)
  else super
  end
end

#image_suffix(img) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 108

def image_suffix(img)
  type = img["mimetype"]&.sub(%r{^[^/*]+/}, "")
  matched = /\.(?<suffix>[^. \r\n\t]+)$/.match img["src"]
  type and !type.empty? and return type
  !matched.nil? and matched[:suffix] and return matched[:suffix]
  "png"
end

#inject_script(doc) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 167

def inject_script(doc)
  return doc unless @scripts

  scripts = File.read(@scripts, encoding: "UTF-8")
  scripts_override = ""
  @scripts_override and
    scripts_override = File.read(@scripts_override, encoding: "UTF-8")
  a = doc.split(%r{</body>})
  "#{a[0]}#{scripts}#{scripts_override}</body>#{a[1]}"
end

#make_body1(body, _docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/html.rb', line 18

def make_body1(body, _docxml)
  return if @bare

  body.div class: "title-section" do |div1|
    div1.p { |p| p << "&#xa0;" } # placeholder
  end
  section_break(body)
end

#make_body2(body, _docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/html.rb', line 27

def make_body2(body, _docxml)
  return if @bare

  body.div class: "prefatory-section" do |div2|
    div2.p { |p| p << "&#xa0;" } # placeholder
  end
  section_break(body)
end

#mathjax(open, close) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 190

def mathjax(open, close)
  MATHJAX.gsub("OPEN", open).gsub("CLOSE", close)
end

#mathml(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 79

def mathml(docxml)
  IsoDoc::HtmlFunction::MathvariantToPlain.new(docxml).convert
end

#move_image1(img) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 116

def move_image1(img)
  suffix = image_suffix(img)
  uuid = UUIDTools::UUID.random_create.to_s
  fname = "#{uuid}.#{suffix}"
  new_full_filename = File.join(tmpimagedir, fname)
  local_filename = image_localfile(img)
  FileUtils.cp local_filename, new_full_filename
  img["src"] = File.join(rel_tmpimagedir, fname)
end

#move_images(docxml) ⇒ Object

presupposes that the image source is local



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# File 'lib/isodoc/html_function/postprocess.rb', line 94

def move_images(docxml)
  FileUtils.rm_rf tmpimagedir
  FileUtils.mkdir tmpimagedir
  docxml.xpath("//*[local-name() = 'img'][@src]").each do |i|
    /^data:/.match? i["src"] and next
    @datauriimage ? datauri(i) : move_image1(i)
  end
  docxml
end

#postprocess(result, filename, _dir) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 9

def postprocess(result, filename, _dir)
  result = from_xhtml(cleanup(to_xhtml(textcleanup(result))))
  toHTML(result, filename)
  @files_to_delete.each { |f| FileUtils.rm_rf f }
end

#remove_placeholder_paras(html) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 63

def remove_placeholder_paras(html)
  %w(title-section prefatory-section).each do |s|
    html&.at("//div[@class = '#{s}']/p[last()]")&.remove
  end
  html
end

#resize_images(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 83

def resize_images(docxml)
  docxml.xpath("//*[local-name() = 'img' or local-name() = 'svg']")
    .each do |i|
    loc = image_localfile(i) or next
    i["width"], i["height"] = Vectory::ImageResize.new
      .call(i, loc, @maxheight, @maxwidth)
  end
  docxml
end

#script_cdata(result) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 8

def script_cdata(result)
  result.gsub(%r{<script([^<>]*)>\s*<!\[CDATA\[}m, "<script\\1>")
    .gsub(%r{\]\]>\s*</script>}, "</script>")
    .gsub(%r{<!\[CDATA\[\s*<script([^<>]*)>}m, "<script\\1>")
    .gsub(%r{</script>\s*\]\]>}, "</script>")
end

#sourcecode_cleanup(html) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 51

def sourcecode_cleanup(html)
  ann = ".//div[@class = 'annotation']"
  html.xpath("//pre[#{ann}] | //div[@class = 'sourcecode'][#{ann}]")
    .each do |p|
    ins = p.after("<pre class='sourcecode'/>").next_element
    p.xpath(ann).each do |d|
      ins << d.remove.children
    end
  end
  html
end

#sourcecode_parse(node, out) ⇒ Object 



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# File 'lib/isodoc/html_function/html.rb', line 76

def sourcecode_parse(node, out)
  name = node.at(ns("./fmt-name"))
  tag = node.at(ns(".//sourcecode | .//table")) ? "div" : "pre"
  attr = sourcecode_attrs(node).merge(class: "sourcecode")
  out.send tag, **attr do |div|
    sourcecode_parse1(node, div)
  end
  annotation_parse(node, out)
  sourcecode_name_parse(node, out, name)
end

#table_attrs(node) ⇒ Object 



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# File 'lib/isodoc/html_function/html.rb', line 95

def table_attrs(node)
  ret = super
  node.at(ns("./colgroup")) and ret[:style] += "table-layout:fixed;"
  ret
end

#term_header(docxml) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 126

def term_header(docxml)
  %w(h1 h2 h3 h4 h5 h6 h7 h8).each do |h|
    docxml.xpath("//p[@class = 'TermNum'][../#{h}]").each do |p|
      p.name = "h#{h[1].to_i + 1}"
      id = p["id"]
      p["id"] = "_#{UUIDTools::UUID.random_create}"
      p.wrap("<div id='#{id}'></div>")
    end
  end
  docxml
end

#toc_exclude_class ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 162

def toc_exclude_class
  "[not(@class = 'TermNum')][not(@class = 'noTOC')]" \
    "[string-length(normalize-space(.))>0]"
end

#toclevel ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 115

def toclevel
  ret = toclevel_classes.flatten.map do |l|
    "#{l}:not(:empty):not(.TermNum):not(.noTOC)"
  end
  <<~HEAD.freeze
    function toclevel() { return "#{ret.join(',')}";}
  HEAD
end

#toclevel_classes ⇒ Object

array of arrays, one per level, containing XPath fragments for the elems matching that ToC level



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# File 'lib/isodoc/html_function/postprocess_cover.rb', line 111

def toclevel_classes
  (1..@htmlToClevels).reduce([]) { |m, i| m << ["h#{i}"] }
end

#toHTML(result, filename) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess.rb', line 15

def toHTML(result, filename)
  result = from_xhtml(html_cleanup(to_xhtml(result)))
  result = from_xhtml(move_images(resize_images(to_xhtml(result))))
  result = html5(script_cdata(inject_script(result)))
  File.open(filename, "w:UTF-8") { |f| f.write(result) }
end

#underline_parse(node, out) ⇒ Object 



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# File 'lib/isodoc/html_function/html.rb', line 87

def underline_parse(node, out)
  style = node["style"] ? " #{node['style']}" : ""
  attr = { style: "text-decoration: underline#{style}" }
  out.span **attr do |e|
    node.children.each { |n| parse(n, e) }
  end
end

#update_footnote_filter(fnote, xref, idx, seen) ⇒ Object 



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# File 'lib/isodoc/html_function/postprocess_footnotes.rb', line 4

def update_footnote_filter(fnote, xref, idx, seen)
  if seen[fnote.text]
    xref.at("./sup").content = seen[fnote.text][:num].to_s
    fnote.remove unless xref["href"] == seen[fnote.text][:href]
    xref["href"] = seen[fnote.text][:href]
  else
    seen[fnote.text] = { num: idx, href: xref["href"] }
    xref.at("./sup").content = idx.to_s
    idx += 1
  end
  [idx, seen]
end