Class: Asciidoctor::Section

Inherits:
AbstractBlock show all
Defined in:
lib/asciidoctor/section.rb

Overview

> 1

Constant Summary

Constants included from Substitutors

Asciidoctor::Substitutors::CAN, Asciidoctor::Substitutors::CGI, Asciidoctor::Substitutors::DEL, Asciidoctor::Substitutors::ESC_R_SB, Asciidoctor::Substitutors::HighlightedPassSlotRx, Asciidoctor::Substitutors::PASS_END, Asciidoctor::Substitutors::PASS_START, Asciidoctor::Substitutors::PLUS, Asciidoctor::Substitutors::PassSlotRx, Asciidoctor::Substitutors::QuotedTextSniffRx, Asciidoctor::Substitutors::RS, Asciidoctor::Substitutors::R_SB, Asciidoctor::Substitutors::SUB_GROUPS, Asciidoctor::Substitutors::SUB_HINTS, Asciidoctor::Substitutors::SUB_OPTIONS, Asciidoctor::Substitutors::SpecialCharsRx, Asciidoctor::Substitutors::SpecialCharsTr

Instance Attribute Summary collapse

Attributes inherited from AbstractBlock

#blocks, #content_model, #level, #numeral, #source_location, #style, #subs

Attributes inherited from AbstractNode

#attributes, #context, #document, #id, #node_name, #parent

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from AbstractBlock

#alt, #assign_caption, #block?, #blocks?, #captioned_title, #content, #context=, #convert, #file, #find_by, #inline?, #lineno, #list_marker_keyword, #next_adjacent_block, #number, #remove_sub, #sections, #sections?, #sub?, #title, #title=, #title?

Methods inherited from AbstractNode

#add_role, #attr, #attr?, #block?, #converter, #enabled_options, #generate_data_uri, #generate_data_uri_from_uri, #has_role?, #icon_uri, #image_uri, #inline?, #is_uri?, #media_uri, #normalize_asset_path, #normalize_system_path, #normalize_web_path, #option?, #read_asset, #read_contents, #reftext, #reftext?, #remove_attr, #remove_role, #role, #role?, #roles, #set_attr, #set_option, #update_attributes

Methods included from Substitutors

#apply_header_subs, #apply_normal_subs, #apply_reftext_subs, #apply_subs, #expand_subs, #extract_passthroughs, #highlight_source, #resolve_block_subs, #resolve_lines_to_highlight, #resolve_pass_subs, #resolve_subs, #restore_passthroughs, #sub_attributes, #sub_callouts, #sub_macros, #sub_post_replacements, #sub_quotes, #sub_replacements, #sub_source, #sub_specialchars

Methods included from Logging

#logger, #message_with_context

Constructor Details

#initialize(parent = nil, level = nil, numbered = false, opts = {}) ⇒ Section

Initialize an Asciidoctor::Section object.

Parameters:

  • parent (defaults to: nil) —

    The parent AbstractBlock. If set, must be a Document or Section object (default: nil)

  • level (defaults to: nil) —

    The Integer level of this section (default: 1 more than parent level or 1 if parent not defined)

  • numbered (defaults to: false) —

    A Boolean indicating whether numbering is enabled for this Section (default: false)

  • opts (defaults to: {}) —

    An optional Hash of options (default: {})



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# File 'lib/asciidoctor/section.rb', line 46

def initialize parent = nil, level = nil, numbered = false, opts = {}
  super parent, :section, opts
  if Section === parent
    @level, @special = level || (parent.level + 1), parent.special
  else
    @level, @special = level || 1, false
  end
  @numbered = numbered
  @index = 0
end

Instance Attribute Details

#caption ⇒ Object (readonly)

Get the caption for this section (only relevant for appendices)



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# File 'lib/asciidoctor/section.rb', line 38

def caption
  @caption
end

#index ⇒ Object

Get/Set the 0-based index order of this section within the parent block



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# File 'lib/asciidoctor/section.rb', line 25

def index
  @index
end

#numbered ⇒ Object

Get/Set the flag to indicate whether this section should be numbered. The sectnum method should only be called if this flag is true.



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# File 'lib/asciidoctor/section.rb', line 35

def numbered
  @numbered
end

#sectname ⇒ Object

Get/Set the section name of this section



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# File 'lib/asciidoctor/section.rb', line 28

def sectname
  @sectname
end

#special ⇒ Object

Get/Set the flag to indicate whether this is a special section or a child of one



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# File 'lib/asciidoctor/section.rb', line 31

def special
  @special
end

Class Method Details

.generate_id(title, document) ⇒ String

Generate a String ID from the given section title.

The generated ID is prefixed with value of the ‘idprefix’ attribute, which is an underscore (_) by default. Invalid characters are then removed and spaces are replaced with the value of the ‘idseparator’ attribute, which is an underscore (_) by default.

If the generated ID is already in use in the document, a count is appended, offset by the separator, until a unique ID is found.

Section ID generation can be disabled by unsetting the ‘sectids’ document attribute.

Examples:

Section.generate_id 'Foo', document
=> "_foo"

Returns:

  • (String) —

    Returns the generated String ID.



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# File 'lib/asciidoctor/section.rb', line 191

def self.generate_id title, document
  attrs = document.attributes
  pre = attrs['idprefix'] || '_'
  if (sep = attrs['idseparator'])
    if sep.length == 1 || (!(no_sep = sep.empty?) && (sep = attrs['idseparator'] = sep.chr))
      sep_sub = sep == '-' || sep == '.' ? ' .-' : %( #{sep}.-)
    end
  else
    sep, sep_sub = '_', ' _.-'
  end
  gen_id = %(#{pre}#{title.downcase.gsub InvalidSectionIdCharsRx, ''})
  if no_sep
    gen_id = gen_id.delete ' '
  else
    # replace space with separator and remove repeating and trailing separator characters
    gen_id = gen_id.tr_s sep_sub, sep
    gen_id = gen_id.chop if gen_id.end_with? sep
    # ensure id doesn't begin with idseparator if idprefix is empty (assuming idseparator is not empty)
    gen_id = gen_id.slice 1, gen_id.length if pre.empty? && (gen_id.start_with? sep)
  end
  if document.catalog[:refs].key? gen_id
    ids = document.catalog[:refs]
    cnt = Compliance.unique_id_start_index
    cnt += 1 while ids[candidate_id = %(#{gen_id}#{sep}#{cnt})]
    candidate_id
  else
    gen_id
  end
end

Instance Method Details

#<<(block) ⇒ The

Append a content block to this block’s list of blocks.

If the child block is a Section, assign an index to it.

Parameters:

  • block —

    The child Block to append to this parent Block

Returns:

  • (The) —

    parent Block



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# File 'lib/asciidoctor/section.rb', line 159

def << block
  assign_numeral block if block.context == :section
  super
end

#generate_id ⇒ Object

Generate a String ID from the title of this section.

See Section.generate_id for details.



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# File 'lib/asciidoctor/section.rb', line 63

def generate_id
  Section.generate_id title, @document
end

#sectnum(delimiter = '.', append = nil) ⇒ Object

Get the section number for the current Section

The section number is a dot-separated String that uniquely describes the position of this Section in the document. Each entry represents a level of nesting. The value of each entry is the 1-based outline number of the Section amongst its numbered sibling Sections.

This method assumes that both the @level and @parent instance variables have been assigned. The method also assumes that the value of @parent is either a Document or Section.

Examples:

sect1 = Section.new(document)
sect1.level = 1
sect1_1 = Section.new(sect1)
sect1_1.level = 2
sect1_2 = Section.new(sect1)
sect1_2.level = 2
sect1 << sect1_1
sect1 << sect1_2
sect1_1_1 = Section.new(sect1_1)
sect1_1_1.level = 3
sect1_1 << sect1_1_1
sect1.sectnum
# => 1.
sect1_1.sectnum
# => 1.1.
sect1_2.sectnum
# => 1.2.
sect1_1_1.sectnum
# => 1.1.1.
sect1_1_1.sectnum(',', false)
# => 1,1,1

Parameters:

  • delimiter (defaults to: '.') —

    the delimiter to separate the number for each level

  • append (defaults to: nil) —

    the String to append at the end of the section number or Boolean to indicate the delimiter should not be appended to the final level (default: nil)

Returns:

  • the section number as a String



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# File 'lib/asciidoctor/section.rb', line 112

def sectnum(delimiter = '.', append = nil)
  append ||= (append == false ? '' : delimiter)
  @level > 1 && Section === @parent ? %(#{@parent.sectnum(delimiter, delimiter)}#{@numeral}#{append}) : %(#{@numeral}#{append})
end

#to_s ⇒ Object 



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# File 'lib/asciidoctor/section.rb', line 164

def to_s
  if @title
    formal_title = @numbered ? %(#{sectnum} #{@title}) : @title
    %(#<#{self.class}@#{object_id} {level: #{@level}, title: #{formal_title.inspect}, blocks: #{@blocks.size}}>)
  else
    super
  end
end

#xreftext(xrefstyle = nil) ⇒ Object

Public: Generate cross reference text (xreftext) that can be used to refer to this block.

Use the explicit reftext for this block, if specified, retrieved from the AbstractNode#reftext method. Otherwise, if this is a section or captioned block (a block with both a title and caption), generate the xreftext according to the value of the xrefstyle argument (e.g., full, short). This logic may leverage the Asciidoctor::Substitutors#sub_quotes method to apply formatting to the text. If this is not a captioned block, return the title, if present, or nil otherwise.

xrefstyle - An optional String that specifies the style to use to format

the xreftext ('full', 'short', or 'basic') (default: nil).

Returns the generated [String] xreftext used to refer to this block or nothing if there isn’t sufficient information to generate one.



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# File 'lib/asciidoctor/section.rb', line 118

def xreftext xrefstyle = nil
  if (val = reftext) && !val.empty?
    val
  elsif xrefstyle
    if @numbered
      case xrefstyle
      when 'full'
        if (type = @sectname) == 'chapter' || type == 'appendix'
          quoted_title = sub_placeholder (sub_quotes '_%s_'), title
        else
          quoted_title = sub_placeholder (sub_quotes @document.compat_mode ? %q(``%s'') : '"`%s`"'), title
        end
        if (signifier = @document.attributes[%(#{type}-refsig)])
          %(#{signifier} #{sectnum '.', ','} #{quoted_title})
        else
          %(#{sectnum '.', ','} #{quoted_title})
        end
      when 'short'
        if (signifier = @document.attributes[%(#{@sectname}-refsig)])
          %(#{signifier} #{sectnum '.', ''})
        else
          sectnum '.', ''
        end
      else # 'basic'
        (type = @sectname) == 'chapter' || type == 'appendix' ? (sub_placeholder (sub_quotes '_%s_'), title) : title
      end
    else # apply basic styling
      (type = @sectname) == 'chapter' || type == 'appendix' ? (sub_placeholder (sub_quotes '_%s_'), title) : title
    end
  else
    title
  end
end