Module: YARD::Templates::Helpers::HtmlHelper

Includes:
HtmlSyntaxHighlightHelper, MarkupHelper
Defined in:
lib/yard/templates/helpers/html_helper.rb

Overview

The helper module for HTML templates.

Constant Summary

Constants included from MarkupHelper

MarkupHelper::MARKUP_EXTENSIONS, MarkupHelper::MARKUP_FILE_SHEBANG, MarkupHelper::MARKUP_PROVIDERS

Escaping Template Data collapse

Converting Markup to HTML collapse

Syntax Highlighting Source Code collapse

Linking Objects and URLs collapse

URL Helpers collapse

Formatting Objects and Attributes collapse

Getting the Character Encoding collapse

Methods included from HtmlSyntaxHighlightHelper

#html_syntax_highlight_ruby

Methods included from ModuleHelper

#prune_method_listing

Methods included from MarkupHelper

clear_markup_cache, #load_markup_provider, #markup_class, #markup_file_contents, #markup_for_file, #markup_provider

Class Method Details

.urlencode(text) ⇒ String

Escapes a URL


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# File 'lib/yard/templates/helpers/html_helper.rb', line 31

def urlencode(text)
  text = text.dup
  enc = nil
  if text.respond_to?(:force_encoding)
    enc = text.encoding
    text = text.force_encoding('binary')
  end

  text = text.gsub(/%[a-z0-9]{2}|#{URLMATCH}/i) do
    $&.size > 1 ? $& : "%" + $&.ord.to_s(16).upcase
  end.tr(' ', '+')

  text = text.force_encoding(enc) if enc
  text
end

Instance Method Details

#anchor_for(object) ⇒ String


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# File 'lib/yard/templates/helpers/html_helper.rb', line 337

def anchor_for(object)
  case object
  when CodeObjects::MethodObject
    "#{object.name}-#{object.scope}_#{object.type}"
  when CodeObjects::ClassVariableObject
    "#{object.name.to_s.gsub('@@', '')}-#{object.type}"
  when CodeObjects::Base
    "#{object.name}-#{object.type}"
  when CodeObjects::Proxy
    object.path
  else
    object.to_s
  end
end

#charsetString

Returns the current character set. The default value can be overridden by setting the LANG environment variable or by overriding this method. In Ruby 1.9 you can also modify this value by setting Encoding.default_external.

Since:

  • 0.5.4


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# File 'lib/yard/templates/helpers/html_helper.rb', line 564

def charset
  has_encoding = defined?(::Encoding)
  if defined?(@file) && @file && has_encoding
    lang = @file.contents.encoding.to_s
  else
    return 'utf-8' unless has_encoding || ENV['LANG']
    lang =
      if has_encoding
        ::Encoding.default_external.name.downcase
      else
        ENV['LANG'].downcase.split('.').last
      end
  end

  case lang
  when "ascii-8bit", "us-ascii", "ascii-7bit"; 'iso-8859-1'
  when "utf8"; 'utf-8'
  else; lang
  end
end

#format_object_name_list(objects) ⇒ String

Formats a list of objects and links them


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# File 'lib/yard/templates/helpers/html_helper.rb', line 448

def format_object_name_list(objects)
  objects.sort_by {|o| o.name.to_s.downcase }.map do |o|
    "<span class='name'>" + linkify(o, o.name) + "</span>"
  end.join(", ")
end

#format_types(typelist, brackets = true) ⇒ String

Formats a list of types from a tag.


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# File 'lib/yard/templates/helpers/html_helper.rb', line 466

def format_types(typelist, brackets = true)
  return unless typelist.is_a?(Array)
  list = typelist.map do |type|
    type = type.gsub(/([<>])/) { h($1) }
    type = type.gsub(/([\w:]+)/) { $1 == "lt" || $1 == "gt" ? $1 : linkify($1, $1) }
    "<tt>" + type + "</tt>"
  end
  list.empty? ? "" : (brackets ? "(#{list.join(", ")})" : list.join(", "))
end

#h(text) ⇒ String

Escapes HTML entities


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# File 'lib/yard/templates/helpers/html_helper.rb', line 23

def h(text)
  CGI.escapeHTML(text.to_s)
end

#html_markup_asciidoc(text) ⇒ String

Converts Asciidoc to HTML


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# File 'lib/yard/templates/helpers/html_helper.rb', line 102

def html_markup_asciidoc(text)
  options = {:attributes => ASCIIDOC_ATTRIBUTES}
  markup_class(:asciidoc).render(text, options)
end

#html_markup_html(text) ⇒ String

Converts HTML to HTML

Since:

  • 0.6.0


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# File 'lib/yard/templates/helpers/html_helper.rb', line 161

def html_markup_html(text)
  text
end

#html_markup_markdown(text) ⇒ String

Converts Markdown to HTML

Since:

  • 0.6.0


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# File 'lib/yard/templates/helpers/html_helper.rb', line 78

def html_markup_markdown(text)
  # TODO: other libraries might be more complex

  provider = markup_class(:markdown)
  if provider.to_s == 'RDiscount'
    provider.new(text, :autolink).to_html
  elsif provider.to_s == 'RedcarpetCompat'
    provider.new(text, :no_intraemphasis, :gh_blockcode,
                       :fenced_code, :autolink, :tables,
                       :lax_spacing).to_html
  else
    provider.new(text).to_html
  end
end

#html_markup_none(text) ⇒ String

Returns the same text with no markup

Since:

  • 0.6.6


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# File 'lib/yard/templates/helpers/html_helper.rb', line 153

def html_markup_none(text)
  h(text)
end

#html_markup_org(text) ⇒ String

Converts org-mode to HTML


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# File 'lib/yard/templates/helpers/html_helper.rb', line 95

def html_markup_org(text)
  markup_class(:org).new(text).to_html
end

#html_markup_pre(text) ⇒ String

Converts plaintext to pre-formatted HTML

Since:

  • 0.6.0


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# File 'lib/yard/templates/helpers/html_helper.rb', line 139

def html_markup_pre(text)
  "<pre>" + h(text) + "</pre>"
end

#html_markup_rdoc(text) ⇒ String

Converts RDoc formatting (SimpleMarkup) to HTML

Since:

  • 0.6.0


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# File 'lib/yard/templates/helpers/html_helper.rb', line 129

def html_markup_rdoc(text)
  doc = markup_class(:rdoc).new(text)
  doc.from_path = url_for(object) if doc.respond_to?(:from_path=)
  doc.to_html
end

#html_markup_ruby(source) ⇒ String

Highlights Ruby source. Similar to #html_syntax_highlight, but this method is meant to be called from #htmlify when markup is set to “ruby”.

Since:

  • 0.7.0


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# File 'lib/yard/templates/helpers/html_helper.rb', line 172

def html_markup_ruby(source)
  '<pre class="code ruby">' + html_syntax_highlight(source, :ruby) + '</pre>'
end

#html_markup_text(text) ⇒ String

Converts plaintext to regular HTML

Since:

  • 0.6.0


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# File 'lib/yard/templates/helpers/html_helper.rb', line 147

def html_markup_text(text)
  h(text).gsub(/\r?\n/, '<br/>')
end

#html_markup_textile(text) ⇒ String

Converts Textile to HTML

Since:

  • 0.6.0


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# File 'lib/yard/templates/helpers/html_helper.rb', line 111

def html_markup_textile(text)
  doc = markup_class(:textile).new(text)
  doc.hard_breaks = false if doc.respond_to?(:hard_breaks=)
  doc.to_html
end

#html_markup_textile_strict(text) ⇒ String

Converts plaintext to strict Textile (hard breaks)

Since:

  • 0.6.0


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# File 'lib/yard/templates/helpers/html_helper.rb', line 121

def html_markup_textile_strict(text)
  markup_class(:textile).new(text).to_html
end

#html_syntax_highlight(source, type = nil) ⇒ String

Note:

To support a specific language type, implement the method html_syntax_highlight_TYPE in this class.

Syntax highlights source in language type.


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# File 'lib/yard/templates/helpers/html_helper.rb', line 192

def html_syntax_highlight(source, type = nil)
  return "" unless source
  return h(source) unless options.highlight

  new_type, source = parse_lang_for_codeblock(source)
  type ||= new_type || :ruby
  meth = "html_syntax_highlight_#{type}"
  respond_to?(meth) ? send(meth, source) : h(source)
end

#html_syntax_highlight_plain(source) ⇒ String


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# File 'lib/yard/templates/helpers/html_helper.rb', line 203

def html_syntax_highlight_plain(source)
  h(source)
end

#htmlify(text, markup = options.markup) ⇒ String

Turns text into HTML using markup style formatting.


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# File 'lib/yard/templates/helpers/html_helper.rb', line 57

def htmlify(text, markup = options.markup)
  markup_meth = "html_markup_#{markup}"
  return text unless respond_to?(markup_meth)
  return "" unless text
  return text unless markup
  html = send(markup_meth, text).dup
  if html.respond_to?(:encode)
    html = html.force_encoding(text.encoding) # for libs that mess with encoding

    html = html.encode(:invalid => :replace, :replace => '?')
  end
  html = resolve_links(html)
  unless [:text, :none, :pre].include?(markup)
    html = parse_codeblocks(html)
  end
  html
end

#htmlify_line(*args) ⇒ String


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# File 'lib/yard/templates/helpers/html_helper.rb', line 177

def htmlify_line(*args)
  "<div class='inline'>" + htmlify(*args) + "</div>"
end

#insert_include(text, markup = options.markup) ⇒ Object

Inserts an include link while respecting inlining


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# File 'lib/yard/templates/helpers/html_helper.rb', line 289

def insert_include(text, markup = options.markup)
  htmlify(text, markup).gsub(%r{\A\s*<p>|</p>\s*\Z}, '')
end

Links to an extra file

Since:

  • 0.5.5


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# File 'lib/yard/templates/helpers/html_helper.rb', line 263

def link_file(filename, title = nil, anchor = nil)
  if CodeObjects::ExtraFileObject === filename
    file = filename
  else
    contents = File.file?(filename) ? nil : ''
    file = CodeObjects::ExtraFileObject.new(filename, contents)
  end
  return title || file.title unless serializer
  link_url(url_for_file(file, anchor), title || file.title)
end

Include a file as a docstring in output

Since:

  • 0.7.0


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# File 'lib/yard/templates/helpers/html_helper.rb', line 275

def link_include_file(file)
  unless file.is_a?(CodeObjects::ExtraFileObject)
    file = CodeObjects::ExtraFileObject.new(file)
  end
  file.attributes[:markup] ||= markup_for_file('', file.filename)
  insert_include(file.contents, file.attributes[:markup] || options.markup)
end

Includes an object's docstring into output.

Since:

  • 0.6.0


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# File 'lib/yard/templates/helpers/html_helper.rb', line 284

def link_include_object(obj)
  insert_include(obj.docstring)
end

Links to an object with an optional title


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# File 'lib/yard/templates/helpers/html_helper.rb', line 294

def link_object(obj, title = nil, anchor = nil, relative = true)
  return title if obj.nil?
  obj = Registry.resolve(object, obj, true, true) if obj.is_a?(String)
  if title
    title = title.to_s
  elsif object.is_a?(CodeObjects::Base)
    # Check if we're linking to a class method in the current

    # object. If we are, create a title in the format of

    # "CurrentClass.method_name"

    if obj.is_a?(CodeObjects::MethodObject) && obj.scope == :class && obj.parent == object
      title = h([object.name, obj.sep, obj.name].join)
    elsif obj.title != obj.path
      title = h(obj.title)
    else
      title = h(object.relative_path(obj))
    end
  else
    title = h(obj.title)
  end
  return title unless serializer
  return title if obj.is_a?(CodeObjects::Proxy)

  link = url_for(obj, anchor, relative)
  link = link ? link_url(link, title, :title => h("#{obj.title} (#{obj.type})")) : title
  "<span class='object_link'>" + link + "</span>"
end

Links to a URL


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# File 'lib/yard/templates/helpers/html_helper.rb', line 322

def link_url(url, title = nil, params = {})
  title ||= url
  title = title.gsub(/[\r\n]/, ' ')
  params = SymbolHash.new(false).update(
    :href => url,
    :title => h(title)
  ).update(params)
  params[:target] ||= '_parent' if url =~ %r{^(\w+)://}
  "<a #{tag_attrs(params)}>#{title}</a>".gsub(/[\r\n]/, ' ')
end

#mtime(_file) ⇒ Object


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# File 'lib/yard/templates/helpers/html_helper.rb', line 390

def mtime(_file) nil end

Resolves any text in the form of {Name} to the object specified by Name. Also supports link titles in the form {Name title}.

Examples:

Linking to an instance method

resolve_links("{MyClass#method}") # => "<a href='...'>MyClass#method</a>"

Linking to a class with a title

resolve_links("{A::B::C the C class}") # => "<a href='...'>the c class</a>"

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# File 'lib/yard/templates/helpers/html_helper.rb', line 218

def resolve_links(text)
  code_tags = 0
  text.gsub(%r{<(/)?(pre|code|tt)|(\\|!)?\{(?!\})(\S+?)(?:\s([^\}]*?\S))?\}(?=[\W<]|.+</|$)}m) do |str|
    closed = $1
    tag = $2
    escape = $3
    name = $4
    title = $5
    match = $&
    if tag
      code_tags += (closed ? -1 : 1)
      next str
    end
    next str unless code_tags == 0

    next(match[1..-1]) if escape

    next(match) if name[0, 1] == '|'

    if name == '<a' && title =~ %r{href=["'](.+?)["'].*>.*</a>\s*(.*)\Z}
      name = $1
      title = $2
      title = nil if title.empty?
    end

    name = CGI.unescapeHTML(name)

    if object.is_a?(String)
      object
    else
      link = linkify(name, title)
      if (link == name || link == title) && (name + ' ' + link !~ /\A<a\s.*>/)
        match = /(.+)?(\{#{Regexp.quote name}(?:\s.*?)?\})(.+)?/.match(text)
        file = (defined?(@file) && @file ? @file.filename : object.file) || '(unknown)'
        line = (defined?(@file) && @file ? 1 : (object.docstring.line_range ? object.docstring.line_range.first : 1)) + (match ? $`.count("\n") : 0)
        log.warn "In file `#{file}':#{line}: Cannot resolve link to #{name} from text" + (match ? ":" : ".") +
                 "\n\t" + (match[1] ? '...' : '') + match[2].delete("\n") + (match[3] ? '...' : '') if match
      end

      link
    end
  end
end

#signature(meth, link = true, show_extras = true, full_attr_name = true) ⇒ String

Formats the signature of method meth.


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# File 'lib/yard/templates/helpers/html_helper.rb', line 519

def signature(meth, link = true, show_extras = true, full_attr_name = true)
  meth = convert_method_to_overload(meth)

  type = signature_types(meth, link)
  type = "&#x21d2; #{type}" if type && !type.empty?
  scope = meth.scope == :class ? "." : "#"
  name = full_attr_name ? meth.name : meth.name.to_s.gsub(/^(\w+)=$/, '\1')
  blk = format_block(meth)
  args = !full_attr_name && meth.writer? ? "" : format_args(meth)
  extras = []
  extras_text = ''
  if show_extras
    rw = meth.attr_info
    if rw
      attname = [rw[:read] ? 'read' : nil, rw[:write] ? 'write' : nil].compact
      attname = attname.size == 1 ? attname.join('') + 'only' : nil
      extras << attname if attname
    end
    extras << meth.visibility if meth.visibility != :public
    extras_text = ' <span class="extras">(' + extras.join(", ") + ')</span>' unless extras.empty?
  end
  title = "%s<strong>%s</strong>%s %s %s" % [scope, h(name), args, blk, type]
  if link
    if meth.is_a?(YARD::CodeObjects::MethodObject)
      link_title = "#{h meth.name(true)} (#{meth.scope} #{meth.type})"
    else
      link_title = "#{h name} (#{meth.type})"
    end
    obj = meth.respond_to?(:object) ? meth.object : meth
    url = url_for(object, obj)
    link_url(url, title, :title => link_title) + extras_text
  else
    title + extras_text
  end
end

#signature_types(meth, link = true) ⇒ String

Get the return types for a method signature.

Since:

  • 0.5.3


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# File 'lib/yard/templates/helpers/html_helper.rb', line 482

def signature_types(meth, link = true)
  meth = convert_method_to_overload(meth)
  if meth.respond_to?(:object) && !meth.has_tag?(:return)
    meth = meth.object
  end

  type = options.default_return || ""
  if meth.tag(:return) && meth.tag(:return).types
    types = meth.tags(:return).map {|t| t.types ? t.types : [] }.flatten.uniq
    first = link ? h(types.first) : format_types([types.first], false)
    if types.size == 2 && types.last == 'nil'
      type = first + '<sup>?</sup>'
    elsif types.size == 2 && types.last =~ /^(Array)?<#{Regexp.quote types.first}>$/
      type = first + '<sup>+</sup>'
    elsif types.size > 2
      type = [first, '...'].join(', ')
    elsif types == ['void'] && options.hide_void_return
      type = ""
    else
      type = link ? h(types.join(", ")) : format_types(types, false)
    end
  elsif !type.empty?
    type = link ? h(type) : format_types([type], false)
  end
  type = "#{type} " unless type.empty?
  type
end

#url_for(obj, anchor = nil, relative = true) ⇒ String Also known as: mtime_url

Returns the URL for an object.


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# File 'lib/yard/templates/helpers/html_helper.rb', line 358

def url_for(obj, anchor = nil, relative = true)
  link = nil
  return link unless serializer
  return link if obj.is_a?(CodeObjects::Base) && run_verifier([obj]).empty?

  if obj.is_a?(CodeObjects::Base) && !obj.is_a?(CodeObjects::NamespaceObject)
    # If the obj is not a namespace obj make it the anchor.

    anchor = obj
    obj = obj.namespace
  end

  objpath = serializer.serialized_path(obj)
  return link unless objpath

  relative = false if object == Registry.root
  if relative
    fromobj = object
    if object.is_a?(CodeObjects::Base) &&
       !object.is_a?(CodeObjects::NamespaceObject)
      fromobj = owner
    end

    from = serializer.serialized_path(fromobj)
    link = File.relative_path(from, objpath)
  else
    link = objpath
  end

  link + (anchor ? '#' + urlencode(anchor_for(anchor)) : '')
end

#url_for_file(filename, anchor = nil) ⇒ String

Returns the URL for a specific file


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# File 'lib/yard/templates/helpers/html_helper.rb', line 397

def url_for_file(filename, anchor = nil)
  return '' unless serializer
  fromobj = object
  if CodeObjects::Base === fromobj && !fromobj.is_a?(CodeObjects::NamespaceObject)
    fromobj = fromobj.namespace
  end
  from = serializer.serialized_path(fromobj)
  path = filename == options.readme ?

    'index.html' : serializer.serialized_path(filename)
  link = File.relative_path(from, path)
  link += (anchor ? '#' + urlencode(anchor) : '')
  link
end

#url_for_framesetString

Returns the URL for the frameset page

Since:

  • 0.8.0


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# File 'lib/yard/templates/helpers/html_helper.rb', line 424

def url_for_frameset
  url_for_file("frames.html")
end

#url_for_indexString

Returns the URL for the alphabetic index page


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# File 'lib/yard/templates/helpers/html_helper.rb', line 440

def url_for_index
  url_for_file("_index.html")
end

#url_for_list(type) ⇒ String

Returns the URL for a list type

Since:

  • 0.8.0


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# File 'lib/yard/templates/helpers/html_helper.rb', line 416

def url_for_list(type)
  url_for_file("#{type}_list.html")
end

#url_for_mainString

Returns the URL for the main page (README or alphabetic index)


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# File 'lib/yard/templates/helpers/html_helper.rb', line 432

def url_for_main
  url_for_file("index.html")
end