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Contents
module Radius
#
# A tag binding is passed into each tag definition and contains helper methods for working
# with tags. Use it to gain access to the attributes that were passed to the tag, to
# render the tag contents, and to do other tasks.
#
class TagBinding
# The Context that the TagBinding is associated with. Used internally. Try not to use
# this object directly.
attr_reader :context
# The locals object for the current tag.
attr_reader :locals
# The name of the tag (as used in a template string).
attr_reader :name
# The attributes of the tag. Also aliased as TagBinding#attr.
attr_reader :attributes
alias :attr :attributes
# The render block. When called expands the contents of the tag. Use TagBinding#expand
# instead.
attr_reader :block
# Creates a new TagBinding object.
def initialize(context, locals, name, attributes, block)
@context, @locals, @name, @attributes, @block = context, locals, name, attributes, block
end
# Evaluates the current tag and returns the rendered contents.
def expand
double? ? block.call : ''
end
# Returns true if the current tag is a single tag.
def single?
block.nil?
end
# Returns true if the current tag is a container tag.
def double?
not single?
end
# The globals object from which all locals objects ultimately inherit their values.
def globals
@context.globals
end
# Returns a list of the way tags are nested around the current tag as a string.
def nesting
@context.current_nesting
end
# Fires off Context#tag_missing for the current tag.
def missing!
@context.tag_missing(name, attributes, &block)
end
# Renders the tag using the current context .
def render(tag, attributes = {}, &block)
@context.render_tag(tag, attributes, &block)
end
# Shortcut for accessing tag.attr[key]
def [](key)
attr[key]
end
end
end
Version data entries
92 entries across 60 versions & 10 rubygems