-(in-package :lisp-on-lines)
-
-(define-layered-function display-using-description (description object component)
-; (:argument-precedence-order )
- (:documentation
- "Render the object in component,
- using DESCRIPTION, which is an occurence, an attribute, or something else entirely."))
-
-(define-layered-method
- display-using-description (d o c)
- (<:as-html "default :" o))
-
-(defmethod find-layer-for-type (type)
- type)
-
-
-(define-layered-function display (component object &rest args)
- (:documentation
- "Displays OBJECT in COMPONENT."))
-
-(define-layered-method display ((component t) (object t)
- &rest properties
- &key type
- &allow-other-keys)
- "The default display calls out via FUNCALL-WITH-LAYERS to tche DISPLAY-USING-DESCRIPTION method."
-
- (let* ((occurence (find-occurence object))
- (description (or (find-display-attribute
- occurence
- (setf type (or type (description.type occurence))))
- occurence)))
- (if description
- (dletf (((description.type occurence) type)
- ((description.layers description) (append `(+
-
- ;;find-layer-for-type is a
- ;; backwards compat thing
- ,(find-layer-for-type
- type))
- (description.layers description)))
- ((attributes description) (or
- (attributes description)
- (list-slots object))))
- (funcall-with-description
- description properties
- #'display-using-description description object component))
- (error "no description for ~A" object))))
-
-;;;;; Macros
-
-
-(defun funcall-with-description (description properties function &rest args)
- (if description
- (dletf* (((description.type description) (or
- (getf properties :type)
- (description.type description)))
-
- ((description.layers description) (append
- (description.layers description)
- (getf properties :layers)))
- ((description.properties description) properties))
- (funcall-with-layers
- (description.layers description)
- #'(lambda ()
- (contextl::funcall-with-special-initargs
- (list (cons description properties))
- #'(lambda ()
- (apply function args))))))
- (apply function args)))
-
-
-
-(defmacro with-description ((description &rest properties) &body body)
- `(funcall-with-description ,description (if ',(cdr properties)
- (list ,@properties)
- ,(car properties))
- #'(lambda ()
- ,@body)))
-
-(defmacro do-attributes ((var description &optional (attributes `(attributes ,description))) &body body)
- (with-unique-names (att properties type)
- `(dolist* (,att ,attributes)
- (let* ((,att (ensure-list ,att))
- (,properties (rest ,att))
- (,type (getf ,properties :type))
- (,var (let ((a (find-attribute ,description (first ,att))))
- (if ,type
- (apply #'make-attribute :name (first ,att) :type ,type ,properties)
- (if a a (make-attribute :name (first ,att) :slot-name (first ,att)))))))
- (funcall-with-description ,var ,properties
- #'(lambda () ,@body))))))
-
-(defmacro with-component ((component) &body body)
- `(let ((self ,component))
- (declare (ignorable self))
- (flet ((display* (thing &rest args)
- (apply #'display ,component thing args))
- (display-attribute (attribute obj &optional props)
- (if props
- (funcall-with-description
- attribute props
- #'display-using-description attribute obj ,component)
- (display-using-description attribute obj ,component))))
- (declare (ignorable #'display* #'display-attribute))
- ,@body)))
-
-(defmacro defdisplay (&body body)
- (loop with in-layerp = (eq (car body) :in-layer)
- with layer = (if in-layerp (cadr body) 't)
- for tail on (if in-layerp (cddr body) body)
- until (listp (car tail))
- collect (car tail) into qualifiers
- finally
- (when (member :in-layer qualifiers)
- (error "Incorrect occurrence of :in-layer in defdisplay. Must occur before qualifiers."))
- (return
- (destructuring-bind (description object &optional component) (car tail)
- (with-unique-names (d c)
- (let (standard-description-p)
- `(define-layered-method
- display-using-description
- :in-layer ,layer
- ,@qualifiers
-
- (,(cond
- ((listp description)
- (setf d (car description))
- description)
- (t
- (setf d description)
- (setf standard-description-p t)
- `(,d description)))
- ,object
- ,(cond
- ((null component)
- `(,c component))
- ((listp component)
- (setf c (car component))
- component)
- (t
- (setf c component)
- `(,c component))))
- (with-component (,c)
- ,@(cdr tail)))))))))
-
-
+(in-package :lisp-on-lines)
+
+(define-layered-function display-using-description (description object component)
+ (:method-combination wrapping-standard)
+ (:documentation
+ "Render the object in component,
+ using DESCRIPTION, which is an occurence, an attribute, or something else entirely."))
+
+(defun make-display-function (component object
+ &rest properties
+ &key (line #'line-in)
+ &allow-other-keys)
+ "returns a function that expects a 3 argument function as its argument
+
+The function argument (which is usually display-using-description) will be called with the proper environment for display all set up nice n pretty like."
+
+ (lambda (function)
+ (let* ((description (find-occurence object)))
+ (if description
+ (dletf (((attributes description)
+ (or
+ (attributes description)
+ (list-attributes description))))
+ ;; apply the default line to the description
+ (funcall-with-description
+ description
+ (funcall line object)
+ ;; apply the passed in arguments and call display-using-description
+ #'(lambda ()
+ (funcall-with-description
+ description
+ properties
+ function description object component))))
+ (error "no description for ~A" object)))))
+
+(define-layered-function display (component object &rest args)
+ (:documentation
+ "Displays OBJECT in COMPONENT."))
+
+(define-layered-method display ((component t) (object t)
+ &rest properties)
+ " The default display dispatch method
+
+ DISPLAY takes two required arguments,
+ COMPONENT : The component to display FROM (not neccesarily 'in')
+ OBJECT : The 'thing' we want to display... in this case it's the component
+
+ DISPLAY also takes keywords arguments which modify the DESCRIPTION,
+ that is to say the parameters that come together to create the output.
+
+The default display calls out via FUNCALL-WITH-LAYERS to tche DISPLAY-USING-DESCRIPTION method."
+ (funcall (apply 'make-display-function component object properties)
+ 'display-using-description))
+
+;;;;; Macros
+
+(defun funcall-with-layers (layers thunk)
+ (let ((context (current-layer-context)))
+ (loop :for (op layer)
+ :on layers :by #'cddr
+ :do (setf context
+ (case op
+ (+ (adjoin-layer layer context))
+ (- (remove-layer layer context)))))
+ (funcall-with-layer-context context thunk)))
+
+
+(defun funcall-with-description (description properties function &rest args)
+ (if description
+ (dletf* (((description-type description)
+ (or
+ (getf properties :type)
+ (description-type description)))
+
+ ((description-layers description)
+ (append
+ (description-layers description)
+ (getf properties :layers)))
+ ((description-properties description) (append (description-properties description) properties)))
+ (funcall-with-layers
+ (description-layers description)
+ (lambda ()
+ (contextl::funcall-with-special-initargs
+ (list (cons description properties))
+ #'(lambda ()
+ (apply function args))))))
+ (apply function args)))
+
+(defmacro with-description ((description &rest properties) &body body)
+ `(funcall-with-description ,description (if ',(cdr properties)
+ (list ,@properties)
+ ,(car properties))
+ #'(lambda ()
+ ,@body)))
+
+(define-layered-function find-do-attributes (desc))
+
+(define-layered-method find-do-attributes ((description description))
+
+ (loop
+ :for att
+ :in (attributes description)
+ :collect (let ((default (find (car (ensure-list att))
+ (default-attributes description)
+ :key #'car)))
+ (or default att))))
+
+(defmacro do-attributes ((var description &optional (attributes `(find-do-attributes ,description))) &body body)
+ (with-unique-names (att properties type)
+ `(dolist* (,att ,attributes)
+ (let* ((,att (ensure-list ,att))
+ (,properties (rest ,att))
+ (,type (getf ,properties :type))
+ (,var (let ((a (find-attribute ,description (first ,att))))
+ (if ,type
+ (apply #'make-attribute :name (first ,att) :type ,type ,properties)
+ (if a a (make-attribute :name (first ,att) :slot-name (first ,att)))))))
+ (funcall-with-description ,var ,properties
+ #'(lambda ()
+ ,@body))))))
+
+(defmacro with-component ((component) &body body)
+ `(let ((self ,component))
+ (declare (ignorable self))
+ (flet ((display* (thing &rest args)
+ (apply #'display ,component thing args))
+ (display-attribute (attribute obj &rest
+ props)
+ (if props
+ (funcall-with-description
+ attribute props
+ #'display-using-description attribute obj ,component)
+ (display-using-description attribute obj ,component))))
+ (declare (ignorable #'display* #'display-attribute))
+ ,@body)))
+
+
+
+
HCoop / clinton / lisp-on-lines.git / blobdiff