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;;; rudel-display.el --- Display functions for Rudel objects
;;
;; Copyright (C) 2009 Jan Moringen
;;
;; Author: Jan Moringen <scymtym@users.sourceforge.net>
;; Keywords: rudel, display, icons, text, representation
;; X-RCS: $Id:$
;;
;; This file is part of Rudel.
;;
;; Rudel is free software: you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;;
;; Rudel is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with Rudel. If not, see <http://www.gnu.org/licenses>.
;;; Commentary:
;;
;; This file contains methods for `rudel-user' and `rudel-document'
;; classes of the generic function `rudel-display-string'. Specialized
;; methods can be written for derived classes when appropriate.
;;; History:
;;
;; 0.1 - Initial version
;;; Code:
;;
(require 'rudel) ;; make sure `rudel-user' and `rudel-document' are
;; defined
(require 'rudel-icons)
;;; Display functions for basic objects
;;
(defmethod rudel-display-string ((this rudel-user)
&optional use-images align)
"Return a textual representation of THIS for user interface purposes.
When USE-IMAGES is non-nil, add an icon that indicates a user to
the text representation.
When ALIGN is non-nil, align the text representation. If ALIGN is
t, align it to a fixed width. When ALIGN is a number, align it to
a width equal to that number."
(with-slots ((name :object-name) color) this
(propertize
(concat
(when use-images
(propertize "*" 'display rudel-icon-person))
name)
'face (list :background color)))
)
(defmethod rudel-display-string ((this rudel-document)
&optional use-images align)
"Return a textual representation of THIS for user interface purposes.
When USE-IMAGES is non-nil, add an icon that indicates a document
to the text representation.
When ALIGN is non-nil, align the text representation. If ALIGN is
t, align it to a fixed width. When ALIGN is a number, align it to
a width equal to that number."
(with-slots ((name :object-name)) this
(concat
(when use-images
(propertize "*" 'display rudel-icon-document))
name))
)
;;; Display functions for composite structures
;;
(defun rudel-display-object-list-string (objects
&optional separator use-images align)
"Return a textual representation of USER-LIST for user interface purposes.
String representations of users are separated by the string
SEPARATOR or \" \" when SEPARATOR is nil.
USE-IMAGES and ALIGN are passed to the `rudel-display-string'
method for the user class."
(mapconcat
(lambda (object)
(rudel-display-string object use-images align))
objects
(or separator " "))
)
(provide 'rudel-display)
;;; rudel-display.el ends here
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