Events Engine without publishing data from mobs.

[gacela.git] / src / gacela_mobs.scm

diff --git a/src/gacela_mobs.scm b/src/gacela_mobs.scm
index e0e2edd8ba5f7c718b7b6807a6354a98f2faec9e..79792419b279c98137357e4711fb852e65601f5c 100755 (executable)
--- a/src/gacela_mobs.scm
+++ b/src/gacela_mobs.scm
@@ -19,30 +19,38 @@
 
 (define show-mob-hash #f)
 (define hide-mob-hash #f)
+(define refresh-active-mobs #f)
 (define get-active-mobs #f)
-(define clear-active-mobs #f)
+(define hide-all-mobs #f)
 (define mobs-changed? #f)
 
-(let ((active-mobs (make-hash-table)) (changed #f))
+(let ((mobs-table (make-hash-table))
+      (active-mobs '())
+      (changed #f))
+
   (set! show-mob-hash
-       (lambda (key mob)
-         (hash-set! active-mobs key mob)
+       (lambda (mob)
+         (hash-set! mobs-table (mob 'get-mob-id) mob)
          (set! changed #t)))
 
   (set! hide-mob-hash
-       (lambda (key)
-         (hash-remove! key)
+       (lambda (mob-id)
+         (hash-remove! mobs-table mob-id)
          (set! changed #t)))
 
+  (set! refresh-active-mobs
+       (lambda ()
+         (cond (changed
+                (set! changed #f)
+                (set! active-mobs (hash-map->list (lambda (k v) v) mobs-table))))))
+
   (set! get-active-mobs
-       (lambda* (#:optional (refreshed #t))
-         (set! changed (not refreshed))
-         (hash-map->list (lambda (k v) v) active-mobs)))
+       (lambda () active-mobs))
 
-  (set! clear-active-mobs
+  (set! hide-all-mobs
        (lambda ()
          (set! changed #t)
-         (hash-clear! active-mobs)))
+         (hash-clear! mobs-table)))
 
   (set! mobs-changed?
        (lambda () changed)))
@@ -51,20 +59,28 @@
 (define-macro (show-mob mob)
   (cond ((list? mob)
         `(let ((m ,mob))
-           (show-mob-hash (m 'get-mob-id) m)))
+           (show-mob-hash m)))
        (else
-        `(show-mob-hash (,mob 'get-mob-id) (lambda () (,mob))))))
+        `(show-mob-hash (lambda* (#:optional (option #f)) (,mob option))))))
 
 (define-macro (hide-mob mob)
-  `(hide-mob-hash ',mob))
+  (cond ((list? mob)
+        `(let ((m ,mob))
+           (hide-mob-hash (m 'get-mob-id))))
+       (else
+        `(hide-mob-hash (,mob 'get-mob-id)))))
 
-(define (run-mobs mobs)
+(define* (run-mobs #:optional (mobs (get-active-mobs)))
+  (run-mobs-events)
+  (for-each (lambda (m) (m 'publish-data)) mobs)
+  (run-mobs-events)
   (for-each
    (lambda (m)
      (glPushMatrix)
      (m)
      (glPopMatrix))
-   mobs))
+   mobs)
+  (clear-events-data))
 
 
 ;;; Making mobs
@@ -72,16 +88,90 @@
 (define-macro (define-mob mob-head . body)
   (let ((name (car mob-head)) (attr (cdr mob-head)))
     `(define ,(string->symbol (string-concatenate (list "make-" (symbol->string name))))
-       (lambda ()
-        (lambda-mob ,attr ,@body)))))
+       (lambda* ,(if (null? attr) '() `(#:key ,@attr))
+        (the-mob ',name () ,attr ,@body)))))
+
+(define-macro (the-mob type attr publish . body)
+  (let ((mob-id-symbol (gensym))
+       (type-symbol (gensym)))
+    `(let ((,mob-id-symbol (gensym))
+          (,type-symbol ,type)
+          ,@attr)
+       (lambda* (#:optional (option #f))
+        (define (kill-me)
+          (hide-mob-hash ,mob-id-symbol))
+        (case option
+          ((get-mob-id)
+           ,mob-id-symbol)
+          ((get-type)
+           ,type-symbol)
+          ((get-data)
+           ,(cons 'list (map (lambda (x) `(cons ',(car x) ,(car x))) publish)))
+          (else
+           (catch #t
+                  (lambda () ,@body)
+                  (lambda (key . args) #f))))))))
 
 (define-macro (lambda-mob attr . body)
-  `(let ,(cons '(mob-id (gensym)) attr)
-     (lambda* (#:optional (option #f))
-       (case option
-        ((get-mob-id)
-         mob-id)
-        (else
-         (catch #t
-                (lambda () ,@body)
-                (lambda (key . args) #f)))))))
+  `(the-mob 'undefined ,attr '() ,@body))
+
+
+;;; Events Engine
+
+(define def-mobs-event #f)
+(define run-mobs-events #f)
+(define clear-events-data #f)
+
+(define mobs-events (make-hash-table))
+(define returned-data (make-hash-table))
+
+(let ((nop #f))
+  (set! def-mobs-event
+       (lambda (pair fun)
+         (cond ((not fun)
+                (hash-remove! mobs-events pair))
+               (else
+                (hash-set! mobs-events pair fun)))))
+
+  (set! run-mobs-events
+       (lambda* (#:optional (mobs (get-active-mobs)))
+         (hash-for-each
+          (lambda (types fun)
+            (let* ((t1 (car types)) (t2 (cadr types))
+                   (mobs-t1 (filter (lambda (m) (eq? (m 'get-type) t1)) mobs))
+                   (mobs-t2 (filter (lambda (m) (eq? (m 'get-type) t2)) mobs)))
+              (cond ((not (or (null? mobs-t1) (null? mobs-t2)))
+                     (for-each
+                      (lambda (m1)
+                        (let ((id1 (m1 'get-mob-id)))
+                          (for-each
+                           (lambda (m2)
+                             (let ((id2 (m2 'get-mob-id)))
+                               (cond ((not (eq? id1 id2))
+                                      (let ((res (catch #t
+                                                        (lambda () (fun (m1 'get-data) (m2 'get-data)))
+                                                        (lambda (key . args) #f))))
+                                        (cond ((and (list? res) (>= (length res) 2))
+                                               (return-data id1 t2 (car res))
+                                               (return-data id2 t1 (cadr res)))))))))
+                           mobs-t2)))
+                      mobs-t1)))))
+          mobs-events)))
+                 
+
+  (define (return-data mob-id mob-type data)
+    (let* ((key (list mob-id mob-type))
+          (res (hash-ref returned-data key)))
+      (hash-set! returned-data key
+                (cond (res (cons data res))
+                      (else (list data))))))
+
+  (set! clear-events-data
+       (lambda ()
+         (hash-clear! returned-data))))
+
+(define-macro (define-mobs-event types-pair . body)
+  `(def-mobs-event
+     ',types-pair
+     ,(cond ((null? body) #f)
+           (else `(lambda (,(car types-pair) ,(cadr types-pair)) ,@body)))))