Class: Kramdown::BridgetownDocument

Inherits:
Document
  • Object
show all
Defined in:
lib/bridgetown-core/converters/markdown/kramdown_parser.rb

Overview

A Kramdown::Document` subclass meant to optimize memory usage from initializing a kramdown document for parsing.

The optimization is by using the same options Hash (and its derivatives) for converting all Markdown documents in a Bridgetown site.

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source, options = {}) ⇒ BridgetownDocument

rubocop:disable Lint/MissingSuper



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# File 'lib/bridgetown-core/converters/markdown/kramdown_parser.rb', line 47

def initialize(source, options = {}) # rubocop:disable Lint/MissingSuper
  BridgetownDocument.setup(options)

  @options = BridgetownDocument.options
  @root, @warnings = BridgetownDocument.parser.parse(source, @options)
end

Class Attribute Details

.options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/bridgetown-core/converters/markdown/kramdown_parser.rb', line 11

def options
  @options
end

.parser ⇒ Object (readonly)

Returns the value of attribute parser.



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# File 'lib/bridgetown-core/converters/markdown/kramdown_parser.rb', line 11

def parser
  @parser
end

Class Method Details

.setup(options) ⇒ Object

The implementation is basically the core logic in +Kramdown::Document#initialize+



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# File 'lib/bridgetown-core/converters/markdown/kramdown_parser.rb', line 14

def setup(options)
  @cache ||= {}

  # reset variables on a subsequent set up with a different options Hash
  unless @cache[:id] == options.hash
    @options = @parser = nil
    @cache[:id] = options.hash
  end

  @options ||= Options.merge(options).freeze
  @parser  ||= begin
    parser_name = (@options[:input] || "kramdown").to_s
    parser_name = parser_name[0..0].upcase + parser_name[1..]
    try_require("parser", parser_name)

    if Parser.const_defined?(parser_name)
      Parser.const_get(parser_name)
    else
      raise Kramdown::Error, "kramdown has no parser to handle the specified " \
                             "input format: #{@options[:input]}"
    end
  end
end

Instance Method Details

#to_html ⇒ Object

Use Kramdown::Converter::Html class to convert this document into HTML.

The implementation is basically an optimized version of core logic in +Kramdown::Document#method_missing+ from kramdown-2.1.0.



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# File 'lib/bridgetown-core/converters/markdown/kramdown_parser.rb', line 58

def to_html
  output, warnings = Kramdown::Converter::Html.convert(@root, @options)
  @warnings.concat(warnings)
  output
end