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require 'rdoc/code_object'
##
# Abstract class representing either a method or an attribute.
class RDoc::MethodAttr < RDoc::CodeObject
include Comparable
##
# Name of this method/attribute.
attr_accessor :name
##
# public, protected, private
attr_accessor :visibility
##
# Is this a singleton method/attribute?
attr_accessor :singleton
##
# Source file token stream
attr_reader :text
##
# Array of other names for this method/attribute
attr_reader :aliases
##
# The method/attribute we're aliasing
attr_accessor :is_alias_for
#--
# The attributes below are for AnyMethod only.
# They are left here for the time being to
# allow ri to operate.
# TODO modify ri to avoid calling these on attributes.
#++
##
# Parameters yielded by the called block
attr_reader :block_params
##
# Parameters for this method
attr_accessor :params
##
# Different ways to call this method
attr_accessor :call_seq
##
# The call_seq or the param_seq with method name, if there is no call_seq.
attr_reader :arglists
##
# Pretty parameter list for this method
attr_reader :param_seq
##
# Creates a new MethodAttr from token stream +text+ and method or attribute
# name +name+.
#
# Usually this is called by super from a subclass.
def initialize text, name
super()
@text = text
@name = name
@aliases = []
@is_alias_for = nil
@parent_name = nil
@singleton = nil
@visibility = :public
@see = false
@arglists = nil
@block_params = nil
@call_seq = nil
@param_seq = nil
@params = nil
end
##
# Order by #singleton then #name
def <=>(other)
[@singleton ? 0 : 1, name] <=> [other.singleton ? 0 : 1, other.name]
end
##
# A method/attribute is documented if any of the following is true:
# - it was marked with :nodoc:;
# - it has a comment;
# - it is an alias for a documented method;
# - it has a +#see+ method that is documented.
def documented?
super or
(is_alias_for and is_alias_for.documented?) or
(see and see.documented?)
end
##
# A method/attribute to look at,
# in particular if this method/attribute has no documentation.
#
# It can be a method/attribute of the superclass or of an included module,
# including the Kernel module, which is always appended to the included
# modules.
#
# Returns +nil+ if there is no such method/attribute.
# The +#is_alias_for+ method/attribute, if any, is not included.
#
# Templates may generate a "see also ..." if this method/attribute
# has documentation, and "see ..." if it does not.
def see
@see = find_see if @see == false
@see
end
def find_see # :nodoc:
return nil if singleton || is_alias_for
# look for the method
other = find_method_or_attribute name
return other if other
# if it is a setter, look for a getter
return nil unless name =~ /[a-z_]=$/i # avoid == or ===
return find_method_or_attribute name[0..-2]
end
def find_method_or_attribute name # :nodoc:
return nil unless parent.respond_to? :ancestors
searched = parent.ancestors
kernel = RDoc::TopLevel.all_modules_hash['Kernel']
searched << kernel if kernel &&
parent != kernel && !searched.include?(kernel)
searched.each do |ancestor|
next if parent == ancestor
next if String === ancestor
other = ancestor.find_method_named('#' << name) ||
ancestor.find_attribute_named(name)
return other if other
end
nil
end
##
# Abstract method. Contexts in their building phase call this
# to register a new alias for this known method/attribute.
#
# - creates a new AnyMethod/Attribute +newa+ named an_alias.new_name;
# - adds +self+ as +newa.is_alias_for+;
# - adds +newa+ to #aliases
# - adds +newa+ to the methods/attributes of +context+.
def add_alias(an_alias, context)
raise NotImplementedError
end
##
# HTML fragment reference for this method
def aref
type = singleton ? 'c' : 'i'
# % characters are not allowed in html names => dash instead
"#{aref_prefix}-#{type}-#{html_name}"
end
##
# Prefix for +aref+, defined by subclasses.
def aref_prefix
raise NotImplementedError
end
##
# Attempts to sanitize the content passed by the ruby parser:
# remove outer parentheses, etc.
def block_params=(value)
# 'yield.to_s' or 'assert yield, msg'
return @block_params = '' if value =~ /^[\.,]/
# remove trailing 'if/unless ...'
return @block_params = '' if value =~ /^(if|unless)\s/
value = $1.strip if value =~ /^(.+)\s(if|unless)\s/
# outer parentheses
value = $1 if value =~ /^\s*\((.*)\)\s*$/
value = value.strip
# proc/lambda
return @block_params = $1 if value =~ /^(proc|lambda)(\s*\{|\sdo)/
# surrounding +...+ or [...]
value = $1.strip if value =~ /^\+(.*)\+$/
value = $1.strip if value =~ /^\[(.*)\]$/
return @block_params = '' if value.empty?
# global variable
return @block_params = 'str' if value =~ /^\$[&0-9]$/
# wipe out array/hash indices
value.gsub!(/(\w)\[[^\[]+\]/, '\1')
# remove @ from class/instance variables
value.gsub!(/@@?([a-z0-9_]+)/, '\1')
# method calls => method name
value.gsub!(/([A-Z:a-z0-9_]+)\.([a-z0-9_]+)(\s*\(\s*[a-z0-9_.,\s]*\s*\)\s*)?/) do
case $2
when 'to_s' then $1
when 'const_get' then 'const'
when 'new' then
$1.split('::').last. # ClassName => class_name
gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').
gsub(/([a-z\d])([A-Z])/,'\1_\2').
downcase
else
$2
end
end
# class prefixes
value.gsub!(/[A-Za-z0-9_:]+::/, '')
# simple expressions
value = $1 if value =~ /^([a-z0-9_]+)\s*[-*+\/]/
@block_params = value.strip
end
##
# HTML id-friendly method/attribute name
def html_name
CGI.escape(@name.gsub('-', '-2D')).gsub('%','-').sub(/^-/, '')
end
##
# Full method/attribute name including namespace
def full_name
@full_name || "#{parent_name}#{pretty_name}"
end
##
# '::' for a class method/attribute, '#' for an instance method.
def name_prefix
singleton ? '::' : '#'
end
##
# Method/attribute name with class/instance indicator
def pretty_name
"#{name_prefix}#{@name}"
end
##
# Type of method/attribute (class or instance)
def type
singleton ? 'class' : 'instance'
end
##
# Path to this method
def path
"#{@parent.path}##{aref}"
end
##
# Name of our parent with special handling for un-marshaled methods
def parent_name
@parent_name || super
end
def pretty_print q # :nodoc:
alias_for = @is_alias_for ? "alias for #{@is_alias_for.name}" : nil
q.group 2, "[#{self.class.name} #{full_name} #{visibility}", "]" do
if alias_for then
q.breakable
q.text alias_for
end
if text then
q.breakable
q.text "text:"
q.breakable
q.pp @text
end
unless comment.empty? then
q.breakable
q.text "comment:"
q.breakable
q.pp @comment
end
end
end
def inspect # :nodoc:
alias_for = @is_alias_for ? " (alias for #{@is_alias_for.name})" : nil
"#<%s:0x%x %s (%s)%s>" % [
self.class, object_id,
full_name,
visibility,
alias_for,
]
end
def to_s # :nodoc:
if @is_alias_for
"#{self.class.name}: #{full_name} -> #{is_alias_for}"
else
"#{self.class.name}: #{full_name}"
end
end
end
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