Module: Asciidoctor::Html::Pagination

Included in:
Book
Defined in:
lib/asciidoctor/html/pagination.rb

Overview

Mixin to add pagination support to Book class

Defined Under Namespace

Classes: PagItem

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.chevron(left: false) ⇒ Object 



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# File 'lib/asciidoctor/html/pagination.rb', line 10

def self.chevron(left: false)
  transform_attr = %( transform="rotate(180 7 8)") if left
  <<~HTML
    <svg xmlns="http://www.w3.org/2000/svg" width="100%" fill="currentColor" viewBox="3 0 8 16">
      <path#{transform_attr} fill-rule="evenodd" d="M6.776 1.553a.5.5 0 0 1 .671.223l3 6a.5.5 0 0 1 0 .448l-3 6a.5.5 0 1 1-.894-.448L9.44 8 6.553 2.224a.5.5 0 0 1 .223-.671"/>
    </svg>
  HTML
end

.display_prefix(prefix) ⇒ Object 



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# File 'lib/asciidoctor/html/pagination.rb', line 37

def self.display_prefix(prefix)
  %(<span class="title-prefix">#{prefix}</span><br>)
end

.pagitem_html(text, left: false) ⇒ Object 



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# File 'lib/asciidoctor/html/pagination.rb', line 19

def self.pagitem_html(text, left: false)
  if left
    <<~HTML
      <div class="chevron">
        #{Pagination.chevron left:}
      </div>
      <div class="pagination-prv">#{text}</div>
    HTML
  else
    <<~HTML
      <div class="pagination-nxt">#{text}</div>
      <div class="chevron">
        #{Pagination.chevron}
      </div>
    HTML
  end
end

Instance Method Details

#display_paginator(prv, nxt) ⇒ Object 



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# File 'lib/asciidoctor/html/pagination.rb', line 41

def display_paginator(prv, nxt)
  blank = %(<span class="blank">&nbsp;</span>)
  html = [<<~HTML
    <div class="paginator-wrapper">
    <div class="paginator dynamic-width">
  HTML
  ]
  html << if prv
            prefix = Pagination.display_prefix(prv.title) if prv.title
            text = "#{prefix}#{prv.text}"
            <<~HTML
              <a id="flip-back" href="#{prv.url}">
                #{Pagination.pagitem_html text, left: true}
              </a>
            HTML
          else
            blank
          end
  html << if nxt
            prefix = Pagination.display_prefix(nxt.title) if nxt.title
            text = "#{prefix}#{nxt.text}"
            <<~HTML
              <a id="flip-forward" href="#{nxt.url}">
                #{Pagination.pagitem_html text}
              </a>
            HTML
          else
            blank
          end
  html << %(</div></div>)
  html.join("\n")
end

#pagination(key = -1)) ⇒ Object 



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# File 'lib/asciidoctor/html/pagination.rb', line 92

def pagination(key = -1)
  keys = @refs.keys
  idx = keys.find_index key
  return "" unless idx

  prv_nxt keys, idx
end

#prv_nxt(keys, idx) ⇒ Object 



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# File 'lib/asciidoctor/html/pagination.rb', line 74

def prv_nxt(keys, idx)
  pagitems = []
  [idx - 1, idx + 1].each do |i|
    if i.between?(0, keys.size - 1)
      key = keys[i]
      tdata = @templates[key]
      pagitems << PagItem.new(
        url: "#{key}.html",
        title: tdata[:chapheading],
        text: tdata[:chapsubheading]
      )
    else
      pagitems << nil
    end
  end
  display_paginator(*pagitems)
end