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;;; ECMAScript for Guile
;; Copyright (C) 2009 Free Software Foundation, Inc.
;; This program 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 2, 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 General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Code:
(define-module (language ecmascript function)
#:use-module (oop goops)
#:use-module (language ecmascript base)
#:export (*function-prototype* *program-wrappers*))
(define-class <js-program-wrapper> (<js-object>))
(define *program-wrappers* (make-doubly-weak-hash-table 31))
(define *function-prototype* (make <js-object> #:class "Function"
#:value (lambda args *undefined*)))
(define-js-method *function-prototype* (toString)
(format #f "~A" (js-value this)))
(define-js-method *function-prototype* (apply this-arg array)
(cond ((or (null? array) (eq? array *undefined*))
(call/this this-arg (js-value this)))
((is-a? array <js-array-object>)
(call/this this-arg
(lambda ()
(apply (js-value this)
(vector->list (js-array-vector array))))))
(else
(throw 'TypeError 'apply array))))
(define-js-method *function-prototype* (call this-arg . args)
(call/this this-arg
(lambda ()
(apply (js-value this) args))))
(define-method (pget (o <applicable>) p)
(let ((wrapper (hashq-ref *program-wrappers* o)))
(if wrapper
(pget wrapper p)
(pget *function-prototype* p))))
(define-method (pput (o <applicable>) p v)
(let ((wrapper (hashq-ref *program-wrappers* o)))
(if wrapper
(pput wrapper p v)
(let ((wrapper (make <js-program-wrapper> #:value o #:class "Function"
#:prototype *function-prototype*)))
(hashq-set! *program-wrappers* o wrapper)
(pput wrapper p v)))))
(define-method (js-prototype (o <applicable>))
(let ((wrapper (hashq-ref *program-wrappers* o)))
(if wrapper
(js-prototype wrapper)
#f)))
(define-method (js-constructor (o <applicable>))
(let ((wrapper (hashq-ref *program-wrappers* o)))
(if wrapper
(js-constructor wrapper)
#f)))
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