X-Git-Url: https://git.hcoop.net/clinton/lisp-on-lines.git/blobdiff_plain/b1c8f43be32503f3911e60696dba8c9194f28ca5..f56d6e7e926f9c3f968325e244794ff748435ac3:/src/display.lisp

diff --git a/src/display.lisp b/src/display.lisp
index a0be611..6078e83 100644
--- a/src/display.lisp
+++ b/src/display.lisp
@@ -17,11 +17,20 @@
   (dolist (d activate context)
     (setf context (adjoin-layer (find-description d)
 				context))))
-  
-
 
+(defun funcall-with-attribute-context (attribute thunk)
+  (funcall-with-layer-context 
+   (modify-layer-context (current-layer-context) 
+			 :activate (attribute-active-descriptions attribute)
+			 :deactivate (attribute-inactive-descriptions attribute))
+   thunk))
 
+(defmacro with-attribute-context ((attribute) &body body)
+  `(funcall-with-attribute-context ,attribute (lambda () ,@body)))
+  
+  
 (defun display (display object &rest args &key deactivate activate &allow-other-keys)
+
   (funcall-with-layer-context 
    (modify-layer-context (current-layer-context) 
 			 :activate activate 
@@ -32,6 +41,7 @@
 (define-layered-method display-using-description 
   :around (description display object &rest args)
   (declare (ignorable args))
+#+nil  (break "Entering DISPLAY for ~A on ~A using ~A" object display description)
   (let ((*display* display))
     (apply #'funcall-with-described-object 
      (lambda ()
@@ -40,8 +50,6 @@
 
 
 
-
-
 (defun display/d (&rest args)
   (apply #'display-using-description args))