Class: YARD::Tags::Library

Inherits:
Object
  • Object
show all
Defined in:
lib/yard/tags/library.rb

Overview

Keeps track of all the registered meta-data tags and directives. Also allows for defining of custom tags and customizing the tag parsing syntax.

Defining Custom Meta-Data Tags

To define a custom tag, use Library.define_tag. You should pass the tag name and the factory method to use when creating the tag. If you do not provide a factory method to use, it will default to DefaultFactory#parse_tag

You can also define tag objects manually by simply implementing a “tagname_tag” method that returns a Tag object, but they will not take advantage of tag factory parsing:

def mytag_tag(text)
  Tag.new(:mytag, text)
end

Defining Custom Directives

Directives can be defined by calling the Library.define_directive method, taking the directive name, an optional tag factory parser method (to parse the data in the directive into a temporary Tag object) and a Directive subclass that performs the directive processing. For more information on creating a Directive subclass, see the Directive class documentation.

Similar to tags, Directives can also be defined manually, in this case using the method name “mydirective_directive” and returning a new Directive object:

def mydirective_directive(tag, parser)
  MyDirective.new(tag, parser)
end

Namespaced Tags

In YARD 0.8.0+, tags can be namespaced using the '.' character. It is recommended to namespace project specific tags, like @yard.tag_name, so that tags do not collide with other plugins or new built-in tags.

Adding/Changing the Tag Syntax

If you have specialized tag parsing needs you can substitute the #factory object with your own by setting Library.default_factory to a new class with its own parsing methods before running YARD. This is useful if you want to change the syntax of existing tags (@see, @since, etc.)

Examples:

Defining a custom tag

define_tag "Parameter", :param, :with_types_and_name
define_tag "Author", :author

Defining a custom directive

define_directive :method, :with_title_and_text, MethodDirective

See Also:

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(factory = Library.default_factory) ⇒ Library



258
259
260
# File 'lib/yard/tags/library.rb', line 258

def initialize(factory = Library.default_factory)
  self.factory = factory
end

Class Attribute Details

.default_factoryObject

Replace the factory object responsible for parsing tags by setting this to an object (or class) that responds to parse_TAGNAME methods where TAGNAME is the name of the tag.

You should set this value before performing any source parsing with YARD, otherwise your factory class will not be used.

Examples:

YARD::Tags::Library.default_factory = MyFactory

See Also:



82
83
84
# File 'lib/yard/tags/library.rb', line 82

def default_factory
  @default_factory ||= DefaultFactory.new
end

.instanceLibrary



66
67
68
# File 'lib/yard/tags/library.rb', line 66

def instance
  @instance ||= new
end

.labelsSymbolHash{Symbol=>String} (readonly)



62
63
64
# File 'lib/yard/tags/library.rb', line 62

def labels
  @labels
end

.transitive_tagsArray<Symbol>

Sets the list of tags that should apply to any children inside the namespace they are defined in. For instance, a “@since” tag should apply to all methods inside a module it is defined in. Transitive tags can be overridden by directly defining a tag on the child object.

Since:

  • 0.6.0



135
136
137
# File 'lib/yard/tags/library.rb', line 135

def transitive_tags
  @transitive_tags
end

.visible_tagsArray<Symbol>

Sets the list of tags to display when rendering templates. The order of tags in the list is also significant, as it represents the order that tags are displayed in templates.

You can use the Array#place to insert new tags to be displayed in the templates at specific positions:

Library.visible_tags.place(:mytag).before(:return)

Since:

  • 0.6.0



126
127
128
# File 'lib/yard/tags/library.rb', line 126

def visible_tags
  @visible_tags
end

Instance Attribute Details

#factoryObject

A factory class to handle parsing of tags, defaults to default_factory



256
257
258
# File 'lib/yard/tags/library.rb', line 256

def factory
  @factory
end

Class Method Details

.define_directive(tag, tag_meth = nil, directive_class) ⇒ Object

Convenience method to define a new directive using a Tag factory method and Directive subclass that implements the directive callbacks.

See Also:



194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
# File 'lib/yard/tags/library.rb', line 194

def define_directive(tag, tag_meth = nil, directive_class = nil)
  directive_meth = directive_method_name(tag)
  if directive_class.nil?
    tag_meth, directive_class = nil, tag_meth
  end
  class_eval <<-eof, __FILE__, __LINE__
    def #{directive_meth}(tag, parser)
      directive_call(tag, parser)
    end
  eof

  @factory_methods ||= SymbolHash.new(false)
  @factory_methods.update(tag => tag_meth)
  @directive_factory_classes ||= SymbolHash.new(false)
  @directive_factory_classes.update(tag => directive_class)

  tag
end

.define_tag(label, tag, meth = nil) ⇒ Object

Convenience method to define a new tag using one of Tag's factory methods, or the regular DefaultFactory#parse_tag factory method if none is supplied.



156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
# File 'lib/yard/tags/library.rb', line 156

def define_tag(label, tag, meth = nil)
  tag_meth = tag_method_name(tag)
  if meth.is_a?(Class) && Tag > meth
    class_eval <<-eof, __FILE__, __LINE__
      def #{tag_meth}(text)
        #{meth}.new(#{tag.inspect}, text)
      end
    eof
  else
    class_eval <<-eof, __FILE__, __LINE__
      def #{tag_meth}(text)
        send_to_factory(#{tag.inspect}, #{meth.inspect}, text)
      end
    eof
  end

  @labels ||= SymbolHash.new(false)
  @labels.update(tag => label)
  @factory_methods ||= SymbolHash.new(false)
  @factory_methods.update(tag => meth)
  tag
end

.directive_method_name(tag_name) ⇒ Object



217
218
219
# File 'lib/yard/tags/library.rb', line 217

def directive_method_name(tag_name)
  tag_or_directive_method_name(tag_name, 'directive')
end

.factory_method_for(tag) ⇒ Symbol, ...

Returns the factory method used to parse the tag text for a specific tag

Since:

  • 0.6.0



98
99
100
# File 'lib/yard/tags/library.rb', line 98

def factory_method_for(tag)
  @factory_methods[tag]
end

.factory_method_for_directive(directive) ⇒ Symbol, ...

Returns the factory method used to parse the tag text for a specific directive

Since:

  • 0.8.0



111
112
113
# File 'lib/yard/tags/library.rb', line 111

def factory_method_for_directive(directive)
  @directive_factory_classes[directive]
end

.sorted_labelsArray<Symbol>, String

Sorts the labels lexically by their label name, often used when displaying the tags.



141
142
143
# File 'lib/yard/tags/library.rb', line 141

def sorted_labels
  labels.sort_by {|a| a.last.downcase }
end

.tag_method_name(tag_name) ⇒ Object



213
214
215
# File 'lib/yard/tags/library.rb', line 213

def tag_method_name(tag_name)
  tag_or_directive_method_name(tag_name)
end

Instance Method Details

#directive_create(tag_name, tag_buf, parser) ⇒ Directive

Creates a new directive with tag information and a docstring parser object.



288
289
290
291
292
293
# File 'lib/yard/tags/library.rb', line 288

def directive_create(tag_name, tag_buf, parser)
  meth = self.class.factory_method_for(tag_name)
  tag = send_to_factory(tag_name, meth, tag_buf)
  meth = self.class.directive_method_name(tag_name)
  send(meth, tag, parser)
end

#has_directive?(tag_name) ⇒ Boolean



278
279
280
# File 'lib/yard/tags/library.rb', line 278

def has_directive?(tag_name)
  tag_name && respond_to?(self.class.directive_method_name(tag_name))
end

#has_tag?(tag_name) ⇒ Boolean



265
266
267
# File 'lib/yard/tags/library.rb', line 265

def has_tag?(tag_name)
  tag_name && respond_to?(self.class.tag_method_name(tag_name))
end

#tag_create(tag_name, tag_buf) ⇒ Tag

Creates a new Tag object with a given tag name and data



271
272
273
# File 'lib/yard/tags/library.rb', line 271

def tag_create(tag_name, tag_buf)
  send(self.class.tag_method_name(tag_name), tag_buf)
end