Sun Jul 3 08:25:45 UTC 2011 pix@kepibu.org
* Add support for XMLS-style lists, conflicting with LHTML-style lists
diff -rN -u old-Oh, Ducks!/notes new-Oh, Ducks!/notes
--- old-Oh, Ducks!/notes 2013-07-24 10:35:45.000000000 +0000
+++ new-Oh, Ducks!/notes 2013-07-24 10:35:45.000000000 +0000
@@ -51,7 +51,15 @@
For example,
: :depends-on (:oh-ducks :closure-html :cxml)
+** Differentiating between LHTML lists and XMLS lists
+While it would, in theory, be possible to inspect lists and determine if they
+are LHTML or XMLS lists, this is not currently done. You can, however, choose
+which type you'd like to work with by pushing =:lists-are-xmls= or
+=:lists-are-lhtml= to =*features*= before loading "Oh, Ducks!".
+Unfortunately, this means you can only expect to use one list type in a single
+lisp image. Patches to either automagically detect the list type, or to provide
+layered functions are welcome.
* Usage
The combination of oh-ducks and closure-html provides an HTML template
for use with cl-unification, and has the following syntax:
diff -rN -u old-Oh, Ducks!/oh-ducks.asd new-Oh, Ducks!/oh-ducks.asd
--- old-Oh, Ducks!/oh-ducks.asd 2013-07-24 10:35:45.000000000 +0000
+++ new-Oh, Ducks!/oh-ducks.asd 2013-07-24 10:35:45.000000000 +0000
@@ -32,11 +32,17 @@
:requires (:oh-ducks :closure-html)
:components ((:file "chtml")
(:module "traversal"
- :components ((:file "lhtml")
+ :components (#-lists-are-xmls (:file "lhtml")
(:file "pt")))))
(defsystem-connection ducks+cxml
:requires (:oh-ducks :cxml)
:components ((:file "cxml")
(:module "traversal"
- :components ((:file "dom")))))
+ :components ((:file "dom")
+ #-lists-are-lhtml (:file "xmls")))))
+
+;; In case you're wondering, we check the inverse of the :lists-are-* keywords
+;; so, in the event you only load cxml (or chtml), and don't specify which
+;; format lists are expected to take, you get the appropriate list operation by
+;; default.
diff -rN -u old-Oh, Ducks!/traversal/xmls.lisp new-Oh, Ducks!/traversal/xmls.lisp
--- old-Oh, Ducks!/traversal/xmls.lisp 1970-01-01 00:00:00.000000000 +0000
+++ new-Oh, Ducks!/traversal/xmls.lisp 2013-07-24 10:35:45.000000000 +0000
@@ -0,0 +1,58 @@
+;;; WARNING: This conflicts with lhtml.
+(in-package #:oh-ducks.traversal)
+
+(defvar *xmls-family-tree* nil)
+
+(defun in-hash (key hash)
+ (multiple-value-bind (val present-p) (gethash key hash)
+ (declare (ignore val))
+ present-p))
+
+(defun %mark-parents (parent children)
+ (dolist (item children)
+ (setf (gethash item *xmls-family-tree*) parent)
+ (%mark-parents item (element-children item))))
+
+;; WARNING: This won't produce sane results for nested (match)es, because we
+;; have no way to bind in a large enough scope.
+(defmethod unify:unify ((template oh-ducks::css-selector-template)
+ (element list)
+ &optional (env (unify:make-empty-environment))
+ &key)
+ (if (and *xmls-family-tree*
+ (in-hash element *xmls-family-tree*))
+ (call-next-method)
+ (let ((*xmls-family-tree* (make-hash-table :test 'eq)))
+ (%mark-parents nil (list element))
+ (%mark-parents element (element-children element))
+ (call-next-method))))
+
+(defmethod unify:unify ((document list) (template oh-ducks::css-selector-template)
+ &optional (env (unify:make-empty-environment))
+ &key)
+ (unify:unify template document env))
+
+;;; general accessors
+
+(defmethod element-children ((element list))
+ (remove-if-not (lambda (x) (and (listp x) (stringp (car x))))
+ (cddr element)))
+
+(defmethod element-parent ((element list))
+ (multiple-value-bind (parent present?)
+ (gethash element *xmls-family-tree*)
+ (if present?
+ parent
+ (error "unable to determine parent"))))
+
+#+(or)
+(defmethod element-attribute ((attribute symbol) (element list))
+ (cadr (assoc attribute (cadr element))))
+(defmethod element-attribute ((attribute string) (element list))
+ (cadr (assoc attribute (cadr element) :test #'string=)))
+
+(defmethod element-type ((element list))
+ (car element))
+
+(defmethod element-content ((element list))
+ (cddr element))