From: Javier Sancho <jsf@jsancho.org>
Date: Mon, 3 Sep 2012 15:23:02 +0000 (+0200)
Subject: Defining views
X-Git-Url: https://git.jsancho.org/?a=commitdiff_plain;h=779dc6f65b65f45439355545fb1063b40dcc44ea;p=gacela.git

Defining views
---

diff --git a/src/utils.scm b/src/utils.scm
index eb20531..d63a511 100644
--- a/src/utils.scm
+++ b/src/utils.scm
@@ -19,7 +19,8 @@
   #:export (use-cache-with
 	    arguments-calling
 	    arguments-apply
-	    bound?))
+	    bound?
+	    make-producer))
 
 
 ;;; Cache for procedures
diff --git a/src/views.scm b/src/views.scm
index f021286..4665729 100644
--- a/src/views.scm
+++ b/src/views.scm
@@ -26,25 +26,21 @@
 
 (define view-type
   (make-record-type "view" 
-		    '(id body meshes priority)
+		    '(id constructor body meshes priority)
 		    (lambda (record port)
 		      (format port "#<view: ~a meshes>"
 			      (length (view-meshes record))))))
 
-(define (make-view body meshes) ((record-constructor view-type) (gensym) body meshes 0))
+(define (make-view constructor) ((record-constructor view-type) (gensym) constructor #f '() 0))
 (define view? (record-predicate view-type))
 (define view-id (record-accessor view-type 'id))
+(define view-constructor (record-accessor view-type 'constructor))
 (define view-body (record-accessor view-type 'body))
 (define view-meshes (record-accessor view-type 'meshes))
 (define view-priority (record-accessor view-type 'priority))
 
-(define-macro (define-view meshes . body)
-  `(make-view
-    ,(cond ((null? body) `(lambda () #f))
-	   (else `(lambda () ,@body)))
-    (map (lambda (m)
-	   `(,(mesh-inner-property m 'id) . ,m))
-	 ,meshes)))
+(define-macro (define-view body)
+  `(make-view (lambda () ,body)))
 
 (define activated-views '())
 (define (sort-views views-alist)