Module: ActionView::Helpers::TextHelper

Defined in:
lib/rails_autolink/helpers.rb

Instance Method Summary collapse

Instance Method Details

Turns all URLs and e-mail addresses into clickable links. The :link option will limit what should be linked. You can add HTML attributes to the links using :html. Possible values for :link are :all (default), :email_addresses, and :urls. If a block is given, each URL and e-mail address is yielded and the result is used as the link text. By default the text given is sanitized, you can override this behaviour setting the :sanitize option to false, or you can add options to the sanitization of the text using the :sanitize_options option hash.

Examples

auto_link("Go to http://www.rubyonrails.org and say hello to [email protected]")
# => "Go to <a href=\"http://www.rubyonrails.org\">http://www.rubyonrails.org</a> and
#     say hello to <a href=\"mailto:[email protected]\">[email protected]</a>"

auto_link("Visit http://www.loudthinking.com/ or e-mail [email protected]", :link => :urls)
# => "Visit <a href=\"http://www.loudthinking.com/\">http://www.loudthinking.com/</a>
#     or e-mail [email protected]"

auto_link("Visit http://www.loudthinking.com/ or e-mail [email protected]", :link => :email_addresses)
# => "Visit http://www.loudthinking.com/ or e-mail <a href=\"mailto:[email protected]\">[email protected]</a>"

post_body = "Welcome to my new blog at http://www.myblog.com/.  Please e-mail me at [email protected]."
auto_link(post_body, :html => { :target => '_blank' }) do |text|
  truncate(text, :length => 15)
end
# => "Welcome to my new blog at <a href=\"http://www.myblog.com/\" target=\"_blank\">http://www.m...</a>.
      Please e-mail me at <a href=\"mailto:[email protected]\">[email protected]</a>."

You can still use auto_link with the old API that accepts the link as its optional second parameter and the html_options hash as its optional third parameter:

post_body = "Welcome to my new blog at http://www.myblog.com/. Please e-mail me at [email protected]."
auto_link(post_body, :urls)
# => "Welcome to my new blog at <a href=\"http://www.myblog.com/\">http://www.myblog.com</a>.
      Please e-mail me at [email protected]."

auto_link(post_body, :all, :target => "_blank")
# => "Welcome to my new blog at <a href=\"http://www.myblog.com/\" target=\"_blank\">http://www.myblog.com</a>.
      Please e-mail me at <a href=\"mailto:[email protected]\">[email protected]</a>."



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# File 'lib/rails_autolink/helpers.rb', line 52

def auto_link(text, *args, &block) #link = :all, html = {}, &block)
  return ''.html_safe if text.blank?

  options = args.size == 2 ? {} : args.extract_options! # this is necessary because the old auto_link API has a Hash as its last parameter
  unless args.empty?
    options[:link] = args[0] || :all
    options[:html] = args[1] || {}
  end
  options.reverse_merge!(:link => :all, :html => {})
  sanitize = (options[:sanitize] != false)
  sanitize_options = options[:sanitize_options] || {}
  text = conditional_sanitize(text, sanitize, sanitize_options).to_str
  case options[:link].to_sym
    when :all             then conditional_html_safe(auto_link_email_addresses(auto_link_urls(text, options[:html], options, &block), options[:html], &block), sanitize)
    when :email_addresses then conditional_html_safe(auto_link_email_addresses(text, options[:html], &block), sanitize)
    when :urls            then conditional_html_safe(auto_link_urls(text, options[:html], options, &block), sanitize)
  end
end