Redmine

    # The URL of a default image to display if the given email address does

    # not have a gravatar.

    :default => nil,

    # The default size in pixels for the gravatar image (they're square).

    :size => 50,

    # exclude gravatars that may be out of character for your site.

    :rating => 'PG',

    # The alt text to use in the img tag for the gravatar.  Since it's a

    # decorational picture, the alt text should be empty according to the

    # XHTML specs.

    # The title text to use for the img tag for the gravatar.

    :title => '',

    # The class to assign to the img tag for the gravatar.

    :class => 'gravatar',

    # Whether or not to display the gravatars using HTTPS instead of HTTP

    :ssl => false,

  }

  # The methods that will be made available to your views.

  module PublicMethods

    # the given user object will respond_to "email", and return the user's

    # email address.

    def gravatar_for(user, options={})

    def gravatar(email, options={})

      src = h(gravatar_url(email, options))

      options = DEFAULT_OPTIONS.merge(options)

      [:class, :alt, :title].each { |opt| options[opt] = h(options[opt]) }

      # double the size for hires displays

      image_tag src, options.except(:rating, :size, :default, :ssl)

    end

    # Returns the base Gravatar URL for the given email hash

    def gravatar_api_url(hash)

      "//www.gravatar.com/avatar/#{hash}"

    end

  end

end