Module: YARD::Templates::Helpers::MarkupHelper

Included in:
HtmlHelper
Defined in:
lib/yard/templates/helpers/markup_helper.rb

Overview

Helper methods for loading and managing markup types.

Constant Summary collapse

MARKUP_PROVIDERS =

The default list of markup providers for each markup type

{
  :markdown => [
    {:lib => :redcarpet, :const => 'RedcarpetCompat'},
    {:lib => :rdiscount, :const => 'RDiscount'},
    {:lib => :kramdown, :const => 'Kramdown::Document'},
    {:lib => :bluecloth, :const => 'BlueCloth'},
    {:lib => :maruku, :const => 'Maruku'},
    {:lib => :'rpeg-markdown', :const => 'PEGMarkdown'},
    {:lib => :rdoc, :const => 'YARD::Templates::Helpers::Markup::RDocMarkdown'},
  ],
  :textile => [
    {:lib => :redcloth, :const => 'RedCloth'},
  ],
  :textile_strict => [
    {:lib => :redcloth, :const => 'RedCloth'},
  ],
  :rdoc => [
    {:lib => nil, :const => 'YARD::Templates::Helpers::Markup::RDocMarkup'},
  ],
  :asciidoc => [
    {:lib => :asciidoctor, :const => 'Asciidoctor'}
  ],
  :ruby => [],
  :text => [],
  :pre  => [],
  :html => [],
  :none => [],
}
MARKUP_EXTENSIONS =

Returns a list of extensions for various markup types. To register extensions for a type, add them to the array of extensions for the type.

Since:

  • 0.6.0

{
  :html => ['htm', 'html', 'shtml'],
  :text => ['txt'],
  :textile => ['textile', 'txtile'],
  :asciidoc => ['asciidoc', 'ad', 'adoc', 'asc'],
  :markdown => ['markdown', 'md', 'mdown', 'mkd'],
  :rdoc => ['rdoc'],
  :ruby => ['rb', 'ru']
}
MARKUP_FILE_SHEBANG =

Contains the Regexp object that matches the shebang line of extra files to detect the markup type.

/\A#!(\S+)\s*$/

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.clear_markup_cachevoid

This method returns an undefined value.

Clears the markup provider cache information. Mainly used for testing.


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# File 'lib/yard/templates/helpers/markup_helper.rb', line 10

def clear_markup_cache
  self.markup_cache = {}
end

Instance Method Details

#load_markup_provider(type = options.markup) ⇒ Boolean

Attempts to load the first valid markup provider in MARKUP_PROVIDERS. If a provider is specified, immediately try to load it.

On success this sets `@markup_provider` and `@markup_class` to the provider name and library constant class/module respectively for the loaded provider.

On failure this method will inform the user that no provider could be found and exit the program.

Returns:

  • (Boolean)

    whether the markup provider was successfully loaded.


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# File 'lib/yard/templates/helpers/markup_helper.rb', line 81

def load_markup_provider(type = options.markup)
  return true if MarkupHelper.markup_cache[type]
  MarkupHelper.markup_cache[type] ||= {}

  providers = MARKUP_PROVIDERS[type.to_sym]
  return true if providers && providers.empty?
  if providers && options.markup_provider
    providers = providers.select {|p| p[:lib] == options.markup_provider }
  end

  if providers == nil || providers.empty?
    log.error "Invalid markup type '#{type}' or markup provider " +
      "(#{options.markup_provider}) is not registered."
    return false
  end

  # Search for provider, return the library class name as const if found
  providers.each do |provider|
    begin require provider[:lib].to_s; rescue LoadError; next end if provider[:lib]
    begin klass = eval("::" + provider[:const]); rescue NameError; next end
    MarkupHelper.markup_cache[type][:provider] = provider[:lib] # Cache the provider
    MarkupHelper.markup_cache[type][:class] = klass
    return true
  end

  # Show error message telling user to install first potential provider
  name, lib = *[providers.first[:const], providers.first[:lib] || type]
  log.error "Missing '#{lib}' gem for #{type.to_s.capitalize} formatting. Install it with `gem install #{lib}`"
  false
end

#markup_class(type = options.markup) ⇒ Class

Gets the markup provider class/module constant for a markup type Call #load_markup_provider before using this method.

Parameters:

  • type (Symbol) (defaults to: options.markup)

    the markup type (:rdoc, :markdown, etc.)

Returns:

  • (Class)

    the markup class


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# File 'lib/yard/templates/helpers/markup_helper.rb', line 154

def markup_class(type = options.markup)
  load_markup_provider(type)
  MarkupHelper.markup_cache[type][:class]
end

#markup_file_contents(contents) ⇒ String

Deprecated.

Strips any shebang lines on the file contents that pertain to markup or preprocessing data.

Returns:

  • (String)

    the file contents minus any preprocessing tags

Since:

  • 0.6.0


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# File 'lib/yard/templates/helpers/markup_helper.rb', line 145

def markup_file_contents(contents)
  contents =~ MARKUP_FILE_SHEBANG ? $' : contents
end

#markup_for_file(contents, filename) ⇒ Symbol

Checks for a shebang or looks at the file extension to determine the markup type for the file contents. File extensions are registered for a markup type in MARKUP_EXTENSIONS.

A shebang should be on the first line of a file and be in the form:

#!markup_type

Standard markup types are text, html, rdoc, markdown, textile

Parameters:

Returns:

  • (Symbol)

    the markup type recognized for the file

See Also:

Since:

  • 0.6.0


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# File 'lib/yard/templates/helpers/markup_helper.rb', line 127

def markup_for_file(contents, filename)
  if contents && contents =~ MARKUP_FILE_SHEBANG # Shebang support
    return $1.to_sym
  end

  ext = (File.extname(filename)[1..-1] || '').downcase
  MARKUP_EXTENSIONS.each do |type, exts|
    return type if exts.include?(ext)
  end
  options.markup
end

#markup_provider(type = options.markup) ⇒ Symbol

Gets the markup provider name for a markup type Call #load_markup_provider before using this method.

Parameters:

  • type (Symbol) (defaults to: options.markup)

    the markup type (:rdoc, :markdown, etc.)

Returns:

  • (Symbol)

    the markup provider name (usually the gem name of the library)


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# File 'lib/yard/templates/helpers/markup_helper.rb', line 164

def markup_provider(type = options.markup)
  MarkupHelper.markup_cache[type][:provider]
end