Module: Snippr::Links

Defined in:
lib/snippr/links.rb

Constant Summary collapse

HREF_REGEX = 
/(href *= *['"])([^'"]*)(['"])/i

Class Method Summary collapse

Class Method Details

Adjusts a complete anchor tag, allowing the custom protocol popup: which will be converted to a javascript call to popup(this).



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# File 'lib/snippr/links.rb', line 20

def self.adjust_link(link)
  return link if link !~ HREF_REGEX
  url = $2
  if url =~ /popup:\/*(.*)$/i
    url = adjust_url $1
    onclick = "onclick=\"if (typeof popup == 'undefined') { return true; } else { popup(this); return false; }\""
    # replace an existing onclick (if present)
    link_with_onclick = link.gsub /onclick *= *['"][^'"]*['"]/i, onclick
    # add a new onclick (when there was no existing onclick)
    link_with_onclick = link.gsub /(^[^>]+)>/, "\\1 #{onclick}>" if link_with_onclick == link
    link = link_with_onclick
  else
    url = adjust_url url
  end
  link.gsub HREF_REGEX, "\\1#{url}\\3"
end

.adjust_url(url) ⇒ Object

Adjusts an url, prepending / and relative url root (context path) as needed.



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# File 'lib/snippr/links.rb', line 38

def self.adjust_url(url)
  adjust_urls_except.each do |regex|
    return url if url =~ regex
  end
  root = relative_url_root
  url.gsub(/^(#{root}|\/)?/, root)
end

.adjust_urls_except ⇒ Object

Returns the regular expressions used to determine which urls to exclude from adjustment.



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# File 'lib/snippr/links.rb', line 10

def self.adjust_urls_except
  @@adjust_urls_except ||= [/^#/, /^[a-z]+:/i]
end

.adjust_urls_except=(adjust_urls_except) ⇒ Object

Sets the regular expressions used to determine which urls to exclude from adjustment.



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# File 'lib/snippr/links.rb', line 15

def self.adjust_urls_except=(adjust_urls_except)
  @@adjust_urls_except = adjust_urls_except
end

.relative_url_root ⇒ Object

Returns the relative url root (context path) the application is deployed to.



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# File 'lib/snippr/links.rb', line 47

def self.relative_url_root
  if defined? ActionController::Base
    root = ActionController::Base.config.relative_url_root || '/'
    root = "/#{root}" unless root.start_with?('/')
    root << '/' unless root.end_with?('/')
    root
  else
    '/'
  end
end