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;;;; Objective-CL, an Objective-C bridge for Common Lisp.
;;;; Copyright (C) 2007, 2008 Matthias Andreas Benkard.
;;;;
;;;; This program is free software: you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public License
;;;; as published by the Free Software Foundation, either version 3 of
;;;; the License, or (at your option) any later version.
;;;;
;;;; This program 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
;;;; Lesser General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this program. If not, see
;;;; <http://www.gnu.org/licenses/>.
(in-package #:mulk.objective-cl)
(eval-when (:compile-toplevel :load-toplevel :execute)
(find-objc-class "NSObject" t)
(find-objc-class "NSString" t)
(find-objc-class "NSArray" t)
(find-objc-class "NSDictionary" t))
(defclass lisp-value-wrapper-mixin ()
((lisp-value :initarg :value
:initform nil
:accessor lisp-value)))
;; May usefully override, among others:
;; - description
(defclass ns::mlk-lisp-value (ns::ns-object lisp-value-wrapper-mixin)
()
#+(or) (:default-constructor new)
(:metaclass ns::+ns-object))
(defcoercion id ((x list))
(intern-lisp-value x))
(defcoercion id ((x string))
;; FIXME: Implement INTERN-LISP-VALUE.
(primitive-invoke (find-objc-class 'ns-string)
"stringWithUTF8String:"
'id
x))
(defcoercion id ((x t))
(intern-lisp-value x))
(defun intern-lisp-value (value)
;; We need this function in order to preserve object identity on the
;; Objective-C side. As we want [(intern-lisp-value 10) self] to
;; return the FIXNUM 10, that is, a Lisp value rather than an
;; Objective-C instance, we cannot guarantee that
;;
;; (let ((x (intern-lisp-value y)))
;; (objc-eql x (invoke x 'self)))
;;
;; will evaluate to true unless we generally intern Lisp value
;; wrappers.
(error "FIXME"))
(defun make-lisp-value (value)
;; FIXME: The following won't work. Make MAKE-INSTANCE more useful...
;(make-instance 'ns::mlk-lisp-value :value value)
(let ((instance (invoke (typecase value
(string (find-class 'ns::mlk-lisp-string))
(vector (find-class 'ns::mlk-lisp-array))
(list (find-class 'ns::mlk-lisp-list))
(t (find-class 'ns::mlk-lisp-value)))
'new)))
(setf (lisp-value instance) value)
instance))
;; Must override:
;; - characterAtIndex:
;; - length
;;
;; May usefully override, among others:
;; - substringWithRange: (maybe)
;; - getCharacters:range: (for performance reasons)
;; - description
(defclass ns::mlk-lisp-string (ns::ns-string lisp-value-wrapper-mixin)
()
(:metaclass ns::+ns-object))
;; Must override:
;; - objectAtIndex:
;; - count
;;
;; May usefully override, among others:
;; - description
(defclass ns::mlk-lisp-array (ns::ns-array lisp-value-wrapper-mixin)
()
(:metaclass ns::+ns-object))
;; Must override:
;; - objectAtIndex:
;; - count
;;
;; May usefully override, among others:
;; - description
(defclass ns::mlk-lisp-list (ns::ns-array lisp-value-wrapper-mixin)
()
(:metaclass ns::+ns-object))
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