Module: Asciidoctor::ISO::Validate

Included in:
Converter
Defined in:
lib/asciidoctor/iso/validate.rb,
lib/asciidoctor/iso/validate_style.rb,
lib/asciidoctor/iso/validate_section.rb,
lib/asciidoctor/iso/validate_requirements.rb

Constant Summary collapse

SOURCELOCALITY = 
".//locality[@type = 'clause']/referenceFrom".freeze
SI_UNIT =

leaving out as problematic: N J K C S T H h d B o E

"(m|cm|mm|km|μm|nm|g|kg|mgmol|cd|rad|sr|Hz|Hz|MHz|Pa|hPa|kJ|"\
"V|kV|W|MW|kW|F|μF|Ω|Wb|°C|lm|lx|Bq|Gy|Sv|kat|l|t|eV|u|Np|Bd|"\
"bit|kB|MB|Hart|nat|Sh|var)".freeze
NONSTD_UNITS = 
{
  "sec": "s", "mins": "min", "hrs": "h", "hr": "h", "cc": "cm^3",
  "lit": "l", "amp": "A", "amps": "A", "rpm": "r/min"
}.freeze
ONE_SYMBOLS_WARNING = 
"ISO style: only one Symbols and Abbreviated "\
"Terms section in the standard".freeze
NON_DL_SYMBOLS_WARNING = 
"ISO style: Symbols and Abbreviated Terms can "\
"only contain a definition list".freeze
SEQ =

spec of permissible section sequence we skip normative references, it goes to end of list

[
    {
      msg: "Initial section must be (content) Foreword",
      val:  [{ tag: "foreword", title: "Foreword" }],
    },
    {
      msg: "Prefatory material must be followed by (clause) Scope",
      val:  [{ tag: "introduction", title: "Introduction" },
             { tag: "clause", title: "Scope" }],
    },
    {
      msg: "Prefatory material must be followed by (clause) Scope",
      val: [{ tag: "clause", title: "Scope" }],
    },
    {
      msg: "Normative References must be followed by "\
      "Terms and Definitions",
      val: [
        { tag: "terms", title: "Terms and definitions" },
        { tag: "clause", title: "Terms and definitions" },
        {
          tag: "terms",
          title: "Terms, definitions, symbols and abbreviated terms",
        },
        {
          tag: "clause",
          title: "Terms, definitions, symbols and abbreviated terms",
        },
      ],
    },
].freeze
SECTIONS_XPATH = 
"//foreword | //introduction | //sections/terms | .//annex | "\
"//sections/definitions | //sections/clause | //references[not(parent::clause)] | "\
"//clause[descendant::references][not(parent::clause)]".freeze
NORM_ISO_WARN = 
"non-ISO/IEC reference not expected as normative".freeze
SCOPE_WARN = 
"Scope contains subclauses: should be succint".freeze
ASSETS_TO_STYLE = 
"//termsource | //formula | //termnote | //p | //li[not(p)] | "\
"//dt | //dd[not(p)] | //td[not(p)] | //th[not(p)]".freeze
NORM_BIBITEMS = 
"//references[title = 'Normative References']/bibitem".freeze
REQUIREMENT_RE_STR = 
<<~REGEXP.freeze
  \\b
   ( shall | (is|are)_to |
     (is|are)_required_(not_)?to |
     (is|are)_required_that |
     has_to |
     only\\b[^.,]+\\b(is|are)_permitted |
     it_is_necessary |
     (is|are)_not_(allowed | permitted |
                   acceptable | permissible) |
     (is|are)_not_to_be |
     do_not )
  \\b
REGEXP
REQUIREMENT_RE = 
Regexp.new(REQUIREMENT_RE_STR.gsub(/\s/, "").gsub(/_/, "\\s"),
Regexp::IGNORECASE)
RECOMMENDATION_RE_STR = 
<<~REGEXP.freeze
  \\b
      should |
      ought_(not_)?to |
      it_is_(not_)?recommended_that
  \\b
REGEXP
RECOMMENDATION_RE = 
Regexp.new(RECOMMENDATION_RE_STR.gsub(/\s/, "").gsub(/_/, "\\s"),
Regexp::IGNORECASE)
PERMISSION_RE_STR = 
<<~REGEXP.freeze
  \\b
       may |
      (is|are)_(permitted | allowed | permissible ) |
      it_is_not_required_that |
      no\\b[^.,]+\\b(is|are)_required
  \\b
REGEXP
PERMISSION_RE = 
Regexp.new(PERMISSION_RE_STR.gsub(/\s/, "").gsub(/_/, "\\s"),
Regexp::IGNORECASE)
POSSIBILITY_RE_STR = 
<<~REGEXP.freeze
  \\b
     can | cannot | be_able_to |
     there_is_a_possibility_of |
     it_is_possible_to | be_unable_to |
     there_is_no_possibility_of |
     it_is_not_possible_to
  \\b
REGEXP
POSSIBILITY_RE = 
Regexp.new(POSSIBILITY_RE_STR.gsub(/\s/, "").gsub(/_/, "\\s"),
Regexp::IGNORECASE)

Instance Method Summary collapse

Instance Method Details

#asset_style(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_section.rb', line 191

def asset_style(root)
  root.xpath("//example | //termexample").each { |e| example_style(e) }
  root.xpath("//definition").each { |e| definition_style(e) }
  root.xpath("//note").each { |e| note_style(e) }
  root.xpath("//fn").each { |e| footnote_style(e) }
  root.xpath(ASSETS_TO_STYLE).each { |e| style(e, extract_text(e)) }
  asset_title_style(root)
  norm_bibitem_style(root)
end

#asset_title_style(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_section.rb', line 174

def asset_title_style(root)
  root.xpath("//figure[image][not(title)]").each do |node|
    style_warning(node, "Figure should have title", nil)
  end
  root.xpath("//table[not(title)]").each do |node|
    style_warning(node, "Table should have title", nil)
  end
end

#content_validate(doc) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 184

def content_validate(doc)
  title_validate(doc.root)
  isosubgroup_validate(doc.root)
  section_validate(doc)
  onlychild_clause_validate(doc.root)
  termdef_style(doc.root)
  iev_validate(doc.root)
  see_xrefs_validate(doc.root)
  see_erefs_validate(doc.root)
  locality_erefs_validate(doc.root)
end

#definition_style(node) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 33

def definition_style(node)
  return if @novalid
  r = requirement(extract_text(node))
  style_warning(node, "Definition may contain requirement", r) if r
end

#example_style(node) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 39

def example_style(node)
  return if @novalid
  style_no_guidance(node, extract_text(node), "Term Example")
  style(node, extract_text(node))
end

#external_constraint(text) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_requirements.rb', line 88

def external_constraint(text)
  text.split(/\.\s+/).each do |t|
    return t if /\b(must)\b/xi.match t
  end
  nil
end

#extract_text(node) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 8

def extract_text(node)
  return "" if node.nil?
  node1 = Nokogiri::XML.fragment(node.to_s)
  node1.xpath("//link | //locality").each(&:remove)
  ret = ""
  node1.traverse { |x| ret += x.text if x.text? }
  ret
end

#footnote_style(node) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 51

def footnote_style(node)
  return if @novalid
  style_no_guidance(node, extract_text(node), "Footnote")
  style(node, extract_text(node))
end

#foreword_style(node) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 17

def foreword_style(node)
  return if @novalid
  style_no_guidance(node, extract_text(node), "Foreword")
end

#foreword_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_section.rb', line 17

def foreword_validate(root)
  f = root.at("//foreword") || return
  s = f.at("./clause")
  warn "ISO style: foreword contains subclauses" unless s.nil?
end

#formattedstr_strip(doc) ⇒ Object

RelaxNG cannot cope well with wildcard attributes. So we strip any attributes from FormattedString instances (which can contain xs:any markup, and are signalled with @format) before validation.



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# File 'lib/asciidoctor/iso/validate.rb', line 212

def formattedstr_strip(doc)
  doc.xpath("//*[@format]").each do |n|
    n.elements.each do |e|
      e.traverse do |e1|
        next unless e1.element?
        e1.each { |k, _v| e.delete(k) }
      end
    end
  end
  doc
end

#iev_validate(xmldoc) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 173

def iev_validate(xmldoc)
  xmldoc.xpath("//term").each do |t|
    /^IEV($|\s|:)/.match(t&.at(".//origin/@citeas")&.text) or next
    pref = t.xpath("./preferred").inject([]) { |m, x| m << x&.text&.downcase }
    locality = t.xpath(SOURCELOCALITY)&.text or next
    iev = @iev.fetch(locality, xmldoc&.at("//language")&.text || "en") or next
    pref.include?(iev.downcase) or
      warn %(Term "#{pref[0]}" does not match IEV #{locality} "#{iev}")
  end
end

#introduction_style(node) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 27

def introduction_style(node)
  return if @novalid
  r = requirement(extract_text(node))
  style_warning(node, "Introduction may contain requirement", r) if r
end

#isosubgroup_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 110

def isosubgroup_validate(root)
  root.xpath("//technical-committee/@type").each do |t|
    unless %w{TC PC JTC JPC}.include? t.text
      warn "ISO: invalid technical committee type #{t}"
    end
  end
  root.xpath("//subcommittee/@type").each do |t|
    unless %w{SC JSC}.include? t.text
      warn "ISO: invalid subcommittee type #{t}"
    end
  end
end

#locality_erefs_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 147

def locality_erefs_validate(root)
  root.xpath("//eref[locality]").each do |t|
    unless /:[ ]?\d+{4}$/.match t["citeas"]
      warn "ISO: undated reference #{t['citeas']} should not contain "\
        "specific elements"
    end
  end
end

#norm_bibitem_style(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_section.rb', line 183

def norm_bibitem_style(root)
  root.xpath(NORM_BIBITEMS).each do |b|
    if b.at(Cleanup::ISO_PUBLISHER_XPATH).nil?
      Utils::warning(b, NORM_ISO_WARN, b.text)
    end
  end
end

#normref_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_section.rb', line 23

def normref_validate(root)
  f = root.at("//references[title = 'Normative References']") || return
  f.at("./references | ./clause") &&
    warn("ISO style: normative references contains subclauses")
end

#note_style(node) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 45

def note_style(node)
  return if @novalid
  style_no_guidance(node, extract_text(node), "Note")
  style(node, extract_text(node))
end

#onlychild_clause_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 100

def onlychild_clause_validate(root)
  root.xpath(Utils::SUBCLAUSE_XPATH).each do |c|
    next unless c.xpath("../clause").size == 1
    title = c.at("./title")
    location = c["id"] || c.text[0..60] + "..."
    location += ":#{title.text}" if c["id"] && !title.nil?
    warn "ISO style: #{location}: subclause is only child"
  end
end

#permission(text) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_requirements.rb', line 63

def permission(text)
  text.split(/\.\s+/).each do |t|
    return t if PERMISSION_RE.match t
  end
  nil
end

#possibility(text) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_requirements.rb', line 83

def possibility(text)
  text.split(/\.\s+/).each { |t| return t if POSSIBILITY_RE.match t }
  nil
end

#recommendation(text) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_requirements.rb', line 44

def recommendation(text)
  text.split(/\.\s+/).each do |t|
    return t if RECOMMENDATION_RE.match t
  end
  nil
end

#requirement(text) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_requirements.rb', line 26

def requirement(text)
  text.split(/\.\s+/).each do |t|
    return t if REQUIREMENT_RE.match t
  end
  nil
end

#schema_validate(doc, filename) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 196

def schema_validate(doc, filename)
  File.open(".tmp.xml", "w:UTF-8") { |f| f.write(doc.to_xml) }
  begin
    errors = Jing.new(filename).validate(".tmp.xml")
  rescue Jing::Error => e
    abort "what what what #{e}"
  end
  warn "Valid!" if errors.none?
  errors.each do |error|
    warn "#{error[:message]} @ #{error[:line]}:#{error[:column]}"
  end
end

#scope_style(node) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 22

def scope_style(node)
  return if @novalid
  style_no_guidance(node, extract_text(node), "Scope")
end

#section_style(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_section.rb', line 149

def section_style(root)
  foreword_style(root.at("//foreword"))
  introduction_style(root.at("//introduction"))
  scope_style(root.at("//clause[title = 'Scope']"))
  scope = root.at("//clause[title = 'Scope']/clause")
  scope.nil? || style_warning(scope, SCOPE_WARN, nil)
end

#section_validate(doc) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_section.rb', line 6

def section_validate(doc)
  foreword_validate(doc.root)
  normref_validate(doc.root)
  symbols_validate(doc.root)
  sections_sequence_validate(doc.root)
  section_style(doc.root)
  subclause_validate(doc.root)
  sourcecode_style(doc.root)
  asset_style(doc.root)
end

#sections_sequence_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_section.rb', line 96

def sections_sequence_validate(root)
  f = root.xpath(SECTIONS_XPATH)
  names = f.map { |s| { tag: s.name, title: s&.at("./title")&.text } }
  names = seqcheck(names, SEQ[0][:msg], SEQ[0][:val]) || return
  n = names[0]
  names = seqcheck(names, SEQ[1][:msg], SEQ[1][:val]) || return
  if n == { tag: "introduction", title: "Introduction" }
    names = seqcheck(names, SEQ[2][:msg], SEQ[2][:val]) || return
  end
  names = seqcheck(names, SEQ[3][:msg], SEQ[3][:val]) || return
  n = names.shift
  if n == { tag: "definitions", title: nil }
    n = names.shift || return
  end
  unless n
    warn "ISO style: Document must contain at least one clause"
    return
  end
  n[:tag] == "clause" ||
    warn("ISO style: Document must contain clause after "\
         "Terms and Definitions")
  n == { tag: "clause", title: "Scope" } &&
    warn("ISO style: Scope must occur before Terms and Definitions")
  n = names.shift || return
  while n[:tag] == "clause"
    n[:title] == "Scope" &&
      warn("ISO style: Scope must occur before Terms and Definitions")
    n = names.shift || return
  end
  unless n[:tag] == "annex" || n[:tag] == "references"
    warn "ISO style: Only annexes and references can follow clauses"
  end
  while n[:tag] == "annex"
    n = names.shift
    if n.nil?
      warn("ISO style: Document must include (references) "\
           "Normative References")
      return
    end
  end
  n == { tag: "references", title: "Normative References" } ||
    warn("ISO style: Document must include (references) "\
         "Normative References")
  n = names.shift
  n == { tag: "references", title: "Bibliography" } ||
    warn("ISO style: Final section must be (references) Bibliography")
  names.empty? ||
    warn("ISO style: There are sections after the final Bibliography")
end

#see_erefs_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 135

def see_erefs_validate(root)
  root.xpath("//eref").each do |t|
    preceding = t.at("./preceding-sibling::text()[last()]")
    next unless !preceding.nil? && /\bsee\s*$/mi.match(preceding)
    target = root.at("//*[@id = '#{t['bibitemid']}']")
    if target.at("./ancestor::references"\
        "[title = 'Normative References']")
      warn "ISO: 'see #{t}' is pointing to a normative reference"
    end
  end
end

#see_xrefs_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 123

def see_xrefs_validate(root)
  root.xpath("//xref").each do |t|
    # does not deal with preceding text marked up
    preceding = t.at("./preceding-sibling::text()[last()]")
    next unless !preceding.nil? && /\bsee\s*$/mi.match(preceding)
    (target = root.at("//*[@id = '#{t['target']}']")) || next
    if target&.at("./ancestor-or-self::*[@obligation = 'normative']")
      warn "ISO: 'see #{t['target']}' is pointing to a normative section"
    end
  end
end

#seqcheck(names, msg, accepted) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_section.rb', line 47

def seqcheck(names, msg, accepted)
  n = names.shift
  unless accepted.include? n
    warn "ISO style: #{msg}"
    names = []
  end
  names
end

#sourcecode_style(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_section.rb', line 157

def sourcecode_style(root)
  root.xpath("//sourcecode").each do |x|
    callouts = x.elements.select { |e| e.name == "callout" }
    annotations = x.elements.select { |e| e.name == "annotation" }
    if callouts.size != annotations.size
      warn "#{x['id']}: mismatch of callouts and annotations"
    end
  end
end

#style(n, t) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 82

def style(n, t)
  return if @novalid
  style_number(n, t)
  style_percent(n, t)
  style_abbrev(n, t)
  style_units(n, t)
end

#style_abbrev(n, t) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 107

def style_abbrev(n, t)
  style_regex(/(^|\s)(?!e\.g\.|i\.e\.)
              (?<num>[a-z]{1,2}\.([a-z]{1,2}|\.))\b/ix,
                "no dots in abbreviations", n, t)
  style_regex(/\b(?<num>ppm)\b/i,
              "language-specific abbreviation", n, t)
end

#style_no_guidance(node, text, docpart) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_requirements.rb', line 95

def style_no_guidance(node, text, docpart)
  r = requirement(text)
  style_warning(node, "#{docpart} may contain requirement", r) if r
  r = permission(text)
  style_warning(node, "#{docpart} may contain permission", r) if r
  r = recommendation(text)
  style_warning(node, "#{docpart} may contain recommendation", r) if r
end

#style_non_std_units(n, t) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 133

def style_non_std_units(n, t)
  NONSTD_UNITS.each do |k, v|
    style_regex(/\b(?<num>[0-9][0-9,]*\s+#{k})\b/,
                "non-standard unit (should be #{v})", n, t)
  end
end

#style_number(n, t) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 90

def style_number(n, t)
  style_two_regex_not_prev(n, t, /^(?<num>-?[0-9]{4,}[,0-9]*)$/,
                           %r{(\bISO|\bIEC|\bIEEE/)$},
                           "number not broken up in threes")
  style_regex(/\b(?<num>[0-9]+\.[0-9]+)/i,
              "possible decimal point", n, t)
  style_regex(/\b(?<num>billion[s]?)\b/i,
              "ambiguous number", n, t)
end

#style_percent(n, t) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 100

def style_percent(n, t)
  style_regex(/\b(?<num>[0-9.,]+%)/,
              "no space before percent sign", n, t)
  style_regex(/\b(?<num>[0-9.,]+ \u00b1 [0-9,.]+ %)/,
              "unbracketed tolerance before percent sign", n, t)
end

#style_regex(re, warning, n, text) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 64

def style_regex(re, warning, n, text)
  (m = re.match(text)) && style_warning(n, warning, m[:num])
end

#style_two_regex_not_prev(n, text, re, re_prev, warning) ⇒ Object

style check with a regex on a token and a negative match on its preceding token



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# File 'lib/asciidoctor/iso/validate_style.rb', line 70

def style_two_regex_not_prev(n, text, re, re_prev, warning)
  return if text.nil?
  arr = text.split(/\W+/)
  arr.each_index do |i|
    m = re.match arr[i]
    m_prev = i.zero? ? nil : re_prev.match(arr[i - 1])
    if !m.nil? && m_prev.nil?
      style_warning(n, warning, m[:num])
    end
  end
end

#style_units(n, t) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 120

def style_units(n, t)
  style_regex(/\b(?<num>[0-9][0-9,]*\s+[\u00b0\u2032\u2033])/,
              "space between number and degrees/minutes/seconds", n, t)
  style_regex(/\b(?<num>[0-9][0-9,]*#{SI_UNIT})\b/,
              "no space between number and SI unit", n, t)
  style_non_std_units(n, t)
end

#style_warning(node, msg, text) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_style.rb', line 57

def style_warning(node, msg, text)
  return if @novalid
  w = "ISO style: WARNING (#{Utils::current_location(node)}): #{msg}"
  w += ": #{text}" if text
  warn w
end

#subclause_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_section.rb', line 201

def subclause_validate(root)
  root.xpath("//clause/clause/clause/clause/clause/clause/clause/clause").each do |c|
    style_warning(c, "Exceeds the maximum clause depth of 7", nil)
  end
end

#symbols_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate_section.rb', line 35

def symbols_validate(root)
  f = root.xpath("//definitions")
  f.empty? && return
  (f.size == 1) || warn(ONE_SYMBOLS_WARNING)
  f.first.elements.each do |e|
    unless e.name == "dl"
      warn(NON_DL_SYMBOLS_WARNING)
      return
    end
  end
end

#termdef_style(xmldoc) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 160

def termdef_style(xmldoc)
  xmldoc.xpath("//term").each do |t|
    para = t.at("./definition") || return
    term = t.at("./preferred").text
    termdef_warn(para.text, /^(the|a)\b/i, term,
                 "term definition starts with article")
    termdef_warn(para.text, /\.$/i, term,
                 "term definition ends with period")
  end
end

#termdef_warn(text, re, term, msg) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 156

def termdef_warn(text, re, term, msg)
  re.match(text) && warn("ISO style: #{term}: #{msg}")
end

#title_all_siblings(xpath, label) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 76

def title_all_siblings(xpath, label)
  notitle = false
  withtitle = false
  xpath.each do |s|
    title_all_siblings(s.xpath("./clause | ./terms | ./references"),
                       s&.at("./title")&.text || s["id"])
    subtitle = s.at("./title")
    notitle = notitle || (!subtitle || subtitle.text.empty?)
    withtitle = withtitle || (subtitle && !subtitle.text.empty?)
  end
  notitle && withtitle &&
    warn("#{label}: all subclauses must have a title, or none")
end

#title_first_level_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 65

def title_first_level_validate(root)
      root.xpath(SECTIONS_XPATH).each do |s|
        title = s&.at("./title")&.text || s.name
        s.xpath("./clause | ./terms | ./references").each do |ss|
          subtitle = ss.at("./title")
          !subtitle.nil? && !subtitle&.text&.empty? ||
            warn("#{title}: each first-level subclause must have a title")
    end
  end
end

#title_intro_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 13

def title_intro_validate(root)
  title_intro_en = root.at("//title-intro[@language='en']")
  title_intro_fr = root.at("//title-intro[@language='fr']")
  if title_intro_en.nil? && !title_intro_fr.nil?
    warn "No English Title Intro!"
  end
  if !title_intro_en.nil? && title_intro_fr.nil?
    warn "No French Title Intro!"
  end
end

#title_main_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 24

def title_main_validate(root)
  title_main_en = root.at("//title-main[@language='en']")
  title_main_fr = root.at("//title-main[@language='fr']")
  if title_main_en.nil? && !title_main_fr.nil?
    warn "No English Title!"
  end
  if !title_main_en.nil? && title_main_fr.nil?
    warn "No French Title!"
  end
end

#title_names_type_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 52

def title_names_type_validate(root)
  doctypes = /International\sStandard | Technical\sSpecification |
  Publicly\sAvailable\sSpecification | Technical\sReport | Guide /xi
  title_main_en = root.at("//title-main[@language='en']")
  if !title_main_en.nil? && doctypes.match(title_main_en.text)
    warn "Main Title may name document type"
  end
  title_intro_en = root.at("//title-intro[@language='en']")
  if !title_intro_en.nil? && doctypes.match(title_intro_en.text)
    warn "Title Intro may name document type"
  end
end

#title_part_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 35

def title_part_validate(root)
  title_part_en = root.at("//title-part[@language='en']")
  title_part_fr = root.at("//title-part[@language='fr']")
  (title_part_en.nil? && !title_part_fr.nil?) &&
    warn("No English Title Part!")
  (!title_part_en.nil? && title_part_fr.nil?) &&
    warn("No French Title Part!")
end

#title_subpart_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 44

def title_subpart_validate(root)
  subpart = root.at("//bibdata/docidentifier/project-number[@subpart]")
  iec = root.at("//bibdata/contributor[role/@type = 'publisher']/"\
                "organization[abbreviation = 'IEC' or "\
                "name = 'International Electrotechnical Commission']")
  warn("Subpart defined on non-IEC document!") if subpart && !iec
end

#title_validate(root) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 90

def title_validate(root)
  title_intro_validate(root)
  title_main_validate(root)
  title_part_validate(root)
  title_subpart_validate(root)
  title_names_type_validate(root)
  title_first_level_validate(root)
  title_all_siblings(root.xpath(SECTIONS_XPATH), "(top level)")
end

#validate(doc) ⇒ Object 



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# File 'lib/asciidoctor/iso/validate.rb', line 224

def validate(doc)
  content_validate(doc)
  schema_validate(formattedstr_strip(doc.dup),
                  File.join(File.dirname(__FILE__), "isostandard.rng"))
end