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require 'rdoc/markup/to_html'
##
# Subclass of the RDoc::Markup::ToHtml class that supports looking up words in
# the AllReferences list. Those that are found (like AllReferences in this
# comment) will be hyperlinked
class RDoc::Markup::ToHtmlHyperlink < RDoc::Markup::ToHtml
attr_accessor :context
##
# We need to record the html path of our caller so we can generate
# correct relative paths for any hyperlinks that we find
def initialize(from_path, context, show_hash)
super()
# class names, variable names, or instance variables
@markup.add_special(/(
# A::B.meth(**) (for operator in Fortran95)
\w+(::\w+)*[.\#]\w+(\([\.\w+\*\/\+\-\=\<\>]+\))?
# meth(**) (for operator in Fortran95)
| \#\w+(\([.\w\*\/\+\-\=\<\>]+\))?
| \b([A-Z]\w*(::\w+)*[.\#]\w+) # A::B.meth
| \b([A-Z]\w+(::\w+)*) # A::B
| \#\w+[!?=]? # #meth_name
| \\?\b\w+([_\/\.]+\w+)*[!?=]? # meth_name
)/x,
:CROSSREF)
# external hyperlinks
@markup.add_special(/((link:|https?:|mailto:|ftp:|www\.)\S+\w)/, :HYPERLINK)
# and links of the form <text>[<url>]
@markup.add_special(/(((\{.*?\})|\b\S+?)\[\S+?\.\S+?\])/, :TIDYLINK)
@from_path = from_path
@context = context
@show_hash = show_hash
@seen = {}
end
##
# We're invoked when any text matches the CROSSREF pattern
# (defined in MarkUp). If we fine the corresponding reference,
# generate a hyperlink. If the name we're looking for contains
# no punctuation, we look for it up the module/class chain. For
# example, HyperlinkHtml is found, even without the Generator::
# prefix, because we look for it in module Generator first.
def handle_special_CROSSREF(special)
name = special.text
return @seen[name] if @seen.include? name
if name[0,1] == '#' then
lookup = name[1..-1]
name = lookup unless @show_hash
else
lookup = name
end
# Find class, module, or method in class or module.
if /([A-Z]\w*)[.\#](\w+[!?=]?)/ =~ lookup then
container = $1
method = $2
ref = @context.find_symbol container, method
elsif /([A-Za-z]\w*)[.\#](\w+(\([\.\w+\*\/\+\-\=\<\>]+\))?)/ =~ lookup then
container = $1
method = $2
ref = @context.find_symbol container, method
else
ref = @context.find_symbol lookup
end
out = if lookup =~ /^\\/ then
$'
elsif ref and ref.document_self then
"<a href=\"#{ref.as_href(@from_path)}\">#{name}</a>"
else
name
end
@seen[name] = out
out
end
##
# Generate a hyperlink for url, labeled with text. Handle the
# special cases for img: and link: described under handle_special_HYPEDLINK
def gen_url(url, text)
if url =~ /([A-Za-z]+):(.*)/ then
type = $1
path = $2
else
type = "http"
path = url
url = "http://#{url}"
end
if type == "link" then
url = if path[0, 1] == '#' then # is this meaningful?
path
else
HTML.gen_url @from_path, path
end
end
if (type == "http" or type == "link") and
url =~ /\.(gif|png|jpg|jpeg|bmp)$/ then
"<img src=\"#{url}\" />"
else
"<a href=\"#{url}\">#{text.sub(%r{^#{type}:/*}, '')}</a>"
end
end
##
# And we're invoked with a potential external hyperlink mailto:
# just gets inserted. http: links are checked to see if they
# reference an image. If so, that image gets inserted using an
# <img> tag. Otherwise a conventional <a href> is used. We also
# support a special type of hyperlink, link:, which is a reference
# to a local file whose path is relative to the --op directory.
def handle_special_HYPERLINK(special)
url = special.text
gen_url url, url
end
##
# Here's a hypedlink where the label is different to the URL
# <label>[url]
def handle_special_TIDYLINK(special)
text = special.text
return text unless text =~ /\{(.*?)\}\[(.*?)\]/ or text =~ /(\S+)\[(.*?)\]/
label = $1
url = $2
gen_url url, label
end
end
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