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##
# This class encapsulates links. It contains the text and the URI for
# 'a' tags parsed out of an HTML page. If the link contains an image,
# the alt text will be used for that image.
#
# For example, the text for the following links with both be 'Hello World':
#
# <a href="http://example">Hello World</a>
# <a href="http://example"><img src="test.jpg" alt="Hello World"></a>
class Mechanize::Page::Link
attr_reader :node
attr_reader :href
attr_reader :attributes
attr_reader :page
alias :referer :page
def initialize(node, mech, page)
@node = node
@attributes = node
@href = node['href']
@mech = mech
@page = page
@text = nil
@uri = nil
end
# Click on this link
def click
@mech.click self
end
# This method is a shorthand to get link's DOM id.
# Common usage:
# page.link_with(:dom_id => "links_exact_id")
def dom_id
node['id']
end
# This method is a shorthand to get a link's DOM class
# Common usage:
# page.link_with(:dom_class => "links_exact_class")
def dom_class
node['class']
end
def pretty_print(q) # :nodoc:
q.object_group(self) {
q.breakable; q.pp text
q.breakable; q.pp href
}
end
alias inspect pretty_inspect # :nodoc:
# A list of words in the rel attribute, all lower-cased.
def rel
@rel ||= (val = attributes['rel']) ? val.downcase.split(' ') : []
end
# Test if the rel attribute includes +kind+.
def rel? kind
rel.include? kind
end
# Test if this link should not be traced.
def noreferrer?
rel?('noreferrer')
end
# The text content of this link
def text
return @text if @text
@text = @node.inner_text
# If there is no text, try to find an image and use it's alt text
if (@text.nil? or @text.empty?) and imgs = @node.search('img') then
@text = imgs.map do |e|
e['alt']
end.join
end
@text
end
alias :to_s :text
# A URI for the #href for this link. The link is first parsed as a raw
# link. If that fails parsing an escaped link is attepmted.
def uri
@uri ||= if @href then
begin
URI.parse @href
rescue URI::InvalidURIError
URI.parse WEBrick::HTTPUtils.escape @href
end
end
end
# A fully resolved URI for the #href for this link.
def resolved_uri
@mech.resolve uri
end
end
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