Class: Gretel::Crumb

Inherits:
Object
  • Object
show all
Defined in:
lib/gretel/crumb.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(context, key, *args) ⇒ Crumb

Initializes a new crumb from the given key. It finds the breadcrumb created in Gretel::Crumbs.layout and renders the block using the arguments supplied in args.

Raises:

  • (ArgumentError) 


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# File 'lib/gretel/crumb.rb', line 5

def initialize(context, key, *args)
  block = Gretel::Crumbs.crumbs[key]
  raise ArgumentError, "Breadcrumb :#{key} not found." unless block
  @key = key
  @context = context
  instance_exec *args, &block
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object

Proxy to view context



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# File 'lib/gretel/crumb.rb', line 46

def method_missing(method, *args, &block)
  context.send(method, *args, &block)
end

Instance Attribute Details

#context ⇒ Object (readonly)

The current view context.



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# File 'lib/gretel/crumb.rb', line 43

def context
  @context
end

#key ⇒ Object (readonly)

Key of the breadcrumb.



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# File 'lib/gretel/crumb.rb', line 40

def key
  @key
end

Instance Method Details

Sets link of the breadcrumb.



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# File 'lib/gretel/crumb.rb', line 14

def link(text, url = nil)
  # Transform objects to real paths.
  url = url_for(url) if url
  
  links << Gretel::Link.new(key, text, url)
end

#links ⇒ Object

Holds all of the breadcrumb’s links as a breadcrumb can have multiple links.



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# File 'lib/gretel/crumb.rb', line 22

def links
  @links ||= []
end

#parent(*args) ⇒ Object

Sets or gets the parent breadcrumb. If you supply a parent key and optional arguments, it will set the parent. If nothing is supplied, it will return the parent, if this has been set.

Example:

parent :category, category



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# File 'lib/gretel/crumb.rb', line 32

def parent(*args)
  return @parent if args.empty?
  key = args.shift

  @parent = Gretel::Crumb.new(context, key, *args)
end