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 MarkupHelper

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

Instance Method Details

#anchor_for(object) ⇒ String

Returns the anchor for a specific object

Parameters:

Returns:

  • (String)

    the anchor for a specific object



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# File 'lib/yard/templates/helpers/html_helper.rb', line 290

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.

Returns:

  • (String)

    the current character set

Since:

  • 0.5.4



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# File 'lib/yard/templates/helpers/html_helper.rb', line 478

def charset
  if @file && RUBY19
    lang = @file.contents.encoding.to_s
  else
    return 'utf-8' unless RUBY19 || lang = ENV['LANG']
    if RUBY19
      lang = ::Encoding.default_external.name.downcase
    else
      lang = 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

Returns:

  • (String)

    a formatted list of objects



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# File 'lib/yard/templates/helpers/html_helper.rb', line 365

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.

Parameters:

  • typelist (Array<String>, FalseClass)

    the list of types to be formatted.

  • brackets (Boolean) (defaults to: true)

    omits the surrounding brackets if brackets is set to false.

Returns:

  • (String)

    the list of types formatted as [Type1, Type2, …] with the types linked to their respective descriptions.



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# File 'lib/yard/templates/helpers/html_helper.rb', line 383

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

Parameters:

  • text (String)

    the text to escape

Returns:

  • (String)

    the HTML with escaped entities



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# File 'lib/yard/templates/helpers/html_helper.rb', line 16

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

#html_markup_html(text) ⇒ String

Converts HTML to HTML

Parameters:

  • text (String)

    input html

Returns:

Since:

  • 0.6.0



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# File 'lib/yard/templates/helpers/html_helper.rb', line 128

def html_markup_html(text)
  text
end

#html_markup_markdown(text) ⇒ String

Converts Markdown to HTML

Parameters:

  • text (String)

    input Markdown text

Returns:

Since:

  • 0.6.0



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# File 'lib/yard/templates/helpers/html_helper.rb', line 62

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, :gh_blockcode, :fenced_code, :autolink).to_html
  else
    provider.new(text).to_html
  end
end

#html_markup_none(text) ⇒ String

Returns the same text with no markup

Returns:

  • (String)

    the same text with no markup

Since:

  • 0.6.6



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# File 'lib/yard/templates/helpers/html_helper.rb', line 120

def html_markup_none(text)
  h(text)
end

#html_markup_pre(text) ⇒ String

Converts plaintext to pre-formatted HTML

Parameters:

  • text (String)

    the input text

Returns:

  • (String)

    the output HTML

Since:

  • 0.6.0



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# File 'lib/yard/templates/helpers/html_helper.rb', line 106

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

#html_markup_rdoc(text) ⇒ String

Converts RDoc formatting (SimpleMarkup) to HTML

Parameters:

  • text (String)

    the input RDoc formatted text

Returns:

Since:

  • 0.6.0



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# File 'lib/yard/templates/helpers/html_helper.rb', line 96

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”.

Parameters:

  • source (String)

    the Ruby source

Returns:

  • (String)

    the highlighted HTML

Since:

  • 0.7.0



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

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

Parameters:

  • text (String)

    the input text

Returns:

  • (String)

    the output HTML

Since:

  • 0.6.0



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# File 'lib/yard/templates/helpers/html_helper.rb', line 114

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

#html_markup_textile(text) ⇒ String

Converts Textile to HTML

Parameters:

  • text (String)

    the input Textile text

Returns:

Since:

  • 0.6.0



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

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)

Parameters:

  • text (String)

    the input textile data

Returns:

  • (String)

    the output HTML

Since:

  • 0.6.0



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# File 'lib/yard/templates/helpers/html_helper.rb', line 88

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.

Parameters:

  • source (String)

    the source code to highlight

  • type (Symbol) (defaults to: nil)

    the language type (:ruby, :plain, etc). Use :plain for no syntax highlighting.

Returns:

  • (String)

    the highlighted source



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# File 'lib/yard/templates/helpers/html_helper.rb', line 159

def html_syntax_highlight(source, type = nil)
  return "" unless source
  return h(source) if options[:no_highlight]

  type ||= object.source_type || :ruby

  # handle !!!LANG prefix to send to html_syntax_highlight_LANG
  if source =~ /\A(?:[ \t]*\r?\n)?[ \t]*!!!([\w.+-]+)[ \t]*\r?\n/
    type, source = $1, $'
    source = $'
  end

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

#html_syntax_highlight_plain(source) ⇒ String

Returns unhighlighted source

Returns:

  • (String)

    unhighlighted source



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# File 'lib/yard/templates/helpers/html_helper.rb', line 176

def html_syntax_highlight_plain(source)
  h(source)
end

#htmlify(text, markup = options[:markup]) ⇒ String

Turns text into HTML using markup style formatting.

Parameters:

  • text (String)

    the text to format

  • markup (Symbol) (defaults to: options[:markup])

    examples are :markdown, :textile, :rdoc. To add a custom markup type, see MarkupHelper

Returns:



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# File 'lib/yard/templates/helpers/html_helper.rb', line 36

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)
  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)
  html = html.gsub(/<pre\s*(?:lang="(.+?)")?>(?:\s*<code>)?(.+?)(?:<\/code>\s*)?<\/pre>/m) do
    language = $1
    string   = $2 
    
    string = html_syntax_highlight(CGI.unescapeHTML(string), language) unless options[:no_highlight]
    classes = ['code', language].compact.join(' ')
    %Q{<pre class="#{classes}">#{string}</pre>}
  end unless [:text, :none, :pre].include?(markup)
  html
end

#htmlify_line(*args) ⇒ String

Returns HTMLified text as a single line (paragraphs removed)

Returns:

  • (String)

    HTMLified text as a single line (paragraphs removed)



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# File 'lib/yard/templates/helpers/html_helper.rb', line 144

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

Links to an extra file

Parameters:

  • filename (String)

    the filename to link to

  • title (String) (defaults to: nil)

    the title of the link

  • anchor (String) (defaults to: nil)

    optional anchor

Returns:

  • (String)

    the link to the file

Since:

  • 0.5.5



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# File 'lib/yard/templates/helpers/html_helper.rb', line 228

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

Parameters:

  • file (String)

    the filename to include

Returns:

  • (String)

    the file's contents

Since:

  • 0.7.0



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# File 'lib/yard/templates/helpers/html_helper.rb', line 240

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)
  htmlify(file.contents, file.attributes[:markup] || options[:markup])
end

Includes an object's docstring into output.

Parameters:

Returns:

  • (String)

    the object's docstring (no tags)

Since:

  • 0.6.0



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# File 'lib/yard/templates/helpers/html_helper.rb', line 249

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

Links to an object with an optional title

Parameters:

Returns:

  • (String)

    the linked object



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# File 'lib/yard/templates/helpers/html_helper.rb', line 254

def link_object(obj, otitle = nil, anchor = nil, relative = true)
  return otitle if obj.nil?
  obj = Registry.resolve(object, obj, true, true) if obj.is_a?(String)
  if !otitle && obj.root?
    title = "Top Level Namespace"
  elsif otitle
    title = otitle.to_s
  elsif object.is_a?(CodeObjects::Base)
    title = h(object.relative_path(obj))
  else
    title = h(obj.to_s)
  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.path} (#{obj.type})")) : title
  "<span class='object_link'>" + link + "</span>"
end

Links to a URL

Parameters:

  • url (String)

    the URL to link to

  • title (String) (defaults to: nil)

    the optional title to display the link as

  • params (Hash) (defaults to: {})

    optional parameters for the link

Returns:



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

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

Parameters:

  • text (String)

    the text to resolve links in

Returns:

  • (String)

    HTML with linkified references



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# File 'lib/yard/templates/helpers/html_helper.rb', line 191

def resolve_links(text)
  code_tags = 0
  text.gsub(/<(\/)?(pre|code|tt)|(\\|!)?\{(?!\})(\S+?)(?:\s([^\}]*?\S))?\}(?=[\W<]|.+<\/|$)/m) do |str|
    closed, tag, escape, name, title, match = $1, $2, $3, $4, $5, $&
    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 =~ /href=["'](.+?)["'].*>.*<\/a>\s*(.*)\Z/
      name, title = $1, $2
      title = nil if title.empty?
    end
    
    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 = (@file ? @file.filename : object.file) || '(unknown)'
        line = (@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 ? ":" : ".")
        log.warn((match[1] ? '...' : '') + match[2].gsub("\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.

Parameters:

  • meth (CodeObjects::MethodObject)

    the method object to list the signature of

  • link (Boolean) (defaults to: true)

    whether to link the method signature to the details view

  • show_extras (Boolean) (defaults to: true)

    whether to show extra meta-data (visibility, attribute info)

  • full_attr_name (Boolean) (defaults to: true)

    whether to show the full attribute name (“name=” instead of “name”)

Returns:

  • (String)

    the formatted method signature



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# File 'lib/yard/templates/helpers/html_helper.rb', line 436

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

  type = signature_types(meth, link)
  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
    if rw = meth.attr_info
      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 %s<strong>%s</strong>%s %s" % [scope, type, h(name), args, blk]
  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
    link_url(url_for(obj), 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.

Parameters:

Returns:

  • (String)

    the signature types

Since:

  • 0.5.3



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# File 'lib/yard/templates/helpers/html_helper.rb', line 399

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

Returns the URL for an object.

Parameters:

  • obj (String, CodeObjects::Base)

    the object (or object path) to link to

  • anchor (String) (defaults to: nil)

    the anchor to link to

  • relative (Boolean) (defaults to: true)

    use a relative or absolute link

Returns:

  • (String)

    the URL location of the object



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# File 'lib/yard/templates/helpers/html_helper.rb', line 311

def url_for(obj, anchor = nil, relative = true)
  link = nil
  return link unless serializer

  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

  if relative
    fromobj = object
    if object.is_a?(CodeObjects::Base) &&
        !object.is_a?(CodeObjects::NamespaceObject)
      fromobj = fromobj.namespace
    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

Parameters:

Returns:

  • (String)

    the URL pointing to the file



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# File 'lib/yard/templates/helpers/html_helper.rb', line 344

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)
  if filename == options[:readme]
    path = 'index.html'
  else
    path = serializer.serialized_path(filename)
  end
  link = File.relative_path(from, path)
  link += (anchor ? '#' + urlencode(anchor) : '')
  link
end

#urlencode(text) ⇒ String

Escapes a URL

Parameters:

Returns:

  • (String)

    the escaped URL



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# File 'lib/yard/templates/helpers/html_helper.rb', line 24

def urlencode(text)
  CGI.escape(text.to_s)
end