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##
# Subclass of the RDoc::Markup::ToHtml class that supports looking up method
# names, classes, etc to create links. RDoc::CrossReference is used to
# generate those links based on the current context.
class RDoc::Markup::ToHtmlCrossref < RDoc::Markup::ToHtml
# :stopdoc:
ALL_CROSSREF_REGEXP = RDoc::CrossReference::ALL_CROSSREF_REGEXP
CLASS_REGEXP_STR = RDoc::CrossReference::CLASS_REGEXP_STR
CROSSREF_REGEXP = RDoc::CrossReference::CROSSREF_REGEXP
METHOD_REGEXP_STR = RDoc::CrossReference::METHOD_REGEXP_STR
# :startdoc:
##
# RDoc::CodeObject for generating references
attr_accessor :context
##
# Should we show '#' characters on method references?
attr_accessor :show_hash
##
# Creates a new crossref resolver that generates links relative to +context+
# which lives at +from_path+ in the generated files. '#' characters on
# references are removed unless +show_hash+ is true. Only method names
# preceded by '#' or '::' are linked, unless +hyperlink_all+ is true.
def initialize(options, from_path, context, markup = nil)
raise ArgumentError, 'from_path cannot be nil' if from_path.nil?
super options, markup
@context = context
@from_path = from_path
@hyperlink_all = @options.hyperlink_all
@show_hash = @options.show_hash
crossref_re = @hyperlink_all ? ALL_CROSSREF_REGEXP : CROSSREF_REGEXP
@markup.add_special crossref_re, :CROSSREF
@cross_reference = RDoc::CrossReference.new @context
end
##
# Creates a link to the reference +name+ if the name exists. If +text+ is
# given it is used as the link text, otherwise +name+ is used.
def cross_reference name, text = nil
lookup = name
name = name[1..-1] unless @show_hash if name[0, 1] == '#'
name = "#{CGI.unescape $'} at #{$1}" if name =~ /(.*[^#:])@/
text = name unless text
link lookup, text
end
##
# We're invoked when any text matches the CROSSREF pattern. If we find the
# corresponding reference, generate a link. If the name we're looking for
# contains no punctuation, we look for it up the module/class chain. For
# example, ToHtml is found, even without the <tt>RDoc::Markup::</tt> prefix,
# because we look for it in module Markup first.
def handle_special_CROSSREF(special)
name = special.text
return name if name =~ /@[\w-]+\.[\w-]/ # labels that look like emails
unless @hyperlink_all then
# This ensures that words entirely consisting of lowercase letters will
# not have cross-references generated (to suppress lots of erroneous
# cross-references to "new" in text, for instance)
return name if name =~ /\A[a-z]*\z/
end
cross_reference name
end
##
# Handles <tt>rdoc-ref:</tt> scheme links and allows RDoc::Markup::ToHtml to
# handle other schemes.
def handle_special_HYPERLINK special
return cross_reference $' if special.text =~ /\Ardoc-ref:/
super
end
##
# +special+ is an rdoc-schemed link that will be converted into a hyperlink.
# For the rdoc-ref scheme the cross-reference will be looked up and the
# given name will be used.
#
# All other contents are handled by
# {the superclass}[rdoc-ref:RDoc::Markup::ToHtml#handle_special_RDOCLINK]
def handle_special_RDOCLINK special
url = special.text
case url
when /\Ardoc-ref:/ then
cross_reference $'
else
super
end
end
##
# Generates links for <tt>rdoc-ref:</tt> scheme URLs and allows
# RDoc::Markup::ToHtml to handle other schemes.
def gen_url url, text
return super unless url =~ /\Ardoc-ref:/
cross_reference $', text
end
##
# Creates an HTML link to +name+ with the given +text+.
def link name, text
original_name = name
if name =~ /(.*[^#:])@/ then
name = $1
label = $'
end
ref = @cross_reference.resolve name, text
text = ref.output_name @context if
RDoc::MethodAttr === ref and text == original_name
case ref
when String then
ref
else
path = ref.as_href @from_path
if path =~ /#/ then
path << "-label-#{label}"
elsif ref.sections and
ref.sections.any? { |section| label == section.title } then
path << "##{label}"
else
path << "#label-#{label}"
end if label
"<a href=\"#{path}\">#{text}</a>"
end
end
end