Mon Nov 23 11:33:15 UTC 2009 pix@kepibu.org

* :first-child and :nth-child(n) selectors

--- old-Oh, Ducks!/notes 2015-04-10 16:16:00.000000000 +0000

+++ new-Oh, Ducks!/notes 2015-04-10 16:16:00.000000000 +0000

@@ -5,10 +5,11 @@

* [ ] selectors involving descendants

** write documentation

** improve selector support

-*** positional selectors

- * [ ] :nth-child

+*** positional selectors [2/12]

+ * [X] :nth-child(n)

+ * [ ] :nth-child(xn+y)

* [ ] :nth-last-child

- * [ ] :first-child

+ * [X] :first-child

* [ ] :last-child

* [ ] :nth-of-type

* [ ] :nth-last-of-type

@@ -17,7 +18,7 @@

* [ ] :only-child

* [ ] :only-of-type

* [ ] :empty

-*** attribute selectors

+*** attribute selectors [0/7]

* [ ] attribute-present [att]

* [ ] attribute-equal [att=val]

* [ ] attribute-member [att~=val]

--- old-Oh, Ducks!/selectors.lisp 2015-04-10 16:16:00.000000000 +0000

+++ new-Oh, Ducks!/selectors.lisp 2015-04-10 16:16:00.000000000 +0000

@@ -33,6 +33,10 @@

(defclass type-selector (simple-selector) ())

(defclass id-selector (simple-selector) ())

(defclass class-selector (simple-selector) ())

+(defclass nth-child-selector (simple-selector) ())

+

+(defmethod print-object ((selector universal-selector) stream)

+ (format stream "#<universal-selector>"))

(defmethod initialize-instance :after ((template combinator) &key)

(unless (slot-boundp template 'matcher)

@@ -44,13 +48,23 @@

;; combinators

#+TODO (#T(regexp$ "[ ]*[~][ ]*" ()) (list (make-instance 'sibling-combinator :matcher (parse-selector &rest))))

#+TODO (#T(regexp$ "[ ]*[+][ ]*" ()) (list (make-instance 'adjacent-combinator :matcher (parse-selector &rest))))

- (#T(regexp$ "[ ]*[>][ ]*" ()) (list (make-instance 'child-combinator :matcher (parse-selector &rest))))

- (#T(regexp$ "[ ]+" ()) (list (make-instance 'descendant-combinator :matcher (parse-selector &rest))))

- ;; simple selector

- (#T(regexp$ "[#](\\w+)" (?id)) (cons (make-instance 'id-selector :arg id) (parse-selector &rest)))

- (#T(regexp$ "[\\.](\\w+)" (?class)) (cons (make-instance 'class-selector :arg class) (parse-selector &rest)))

- (#T(regexp$ "(\\w+)" (?type)) (cons (make-instance 'type-selector :arg type) (parse-selector &rest)))

- (#T(regexp$ "\\*" ()) (cons (make-instance 'universal-selector) (parse-selector &rest)))))

+ (#T(regexp$ "[ ]*[>][ ]*" ())

+ (list (make-instance 'child-combinator :matcher (parse-selector &rest))))

+ (#T(regexp$ "[ ]+" ())

+ (list (make-instance 'descendant-combinator :matcher (parse-selector &rest))))

+ ;; simple selectors

+ (#T(regexp$ ":nth-child\\([ ]*([0-9]+)[ ]*\\)" (?n))

+ (cons (make-instance 'nth-child-selector :arg (parse-integer n)) (parse-selector &rest)))

+ (#T(regexp$ ":first-child" ())

+ (cons (make-instance 'nth-child-selector :arg 1) (parse-selector &rest)))

+ (#T(regexp$ "[#](\\w+)" (?id))

+ (cons (make-instance 'id-selector :arg id) (parse-selector &rest)))

+ (#T(regexp$ "[\\.](\\w+)" (?class))

+ (cons (make-instance 'class-selector :arg class) (parse-selector &rest)))

+ (#T(regexp$ "(\\w+)" (?type))

+ (cons (make-instance 'type-selector :arg type) (parse-selector &rest)))

+ (#T(regexp$ "\\*" ())

+ (cons (make-instance 'universal-selector) (parse-selector &rest)))))

(defgeneric find-matching-elements (selector element)

(:method (selector (element t))

@@ -70,6 +84,11 @@

(defmethod element-matches-p (element (selector id-selector))

(string= (element-id element) (selector-arg selector)))

+(defmethod element-matches-p (element (selector nth-child-selector))

+ (alexandria:when-let* ((parent (element-parent element))

+ (pos (position element (element-children parent) :test #'eq)))

+ (= (selector-arg selector) (1+ pos))))

+

(defmethod element-matches-p (element (selector class-selector))

(member (selector-arg selector)

(element-classes element)

--- old-Oh, Ducks!/tests.lisp 2015-04-10 16:16:00.000000000 +0000

+++ new-Oh, Ducks!/tests.lisp 2015-04-10 16:16:00.000000000 +0000

@@ -47,6 +47,12 @@

"<div>I do <i>not</i> like cheese.</div><div><span>I like <i>cheese</i>.</span></div>")

(values i span))

+(match (#T(html (:model dom)

+ ("div:first-child" . ?div)

+ ("i:nth-child(1)" . ?i))

+ "<div>I do <i>not</i> <i>like</i> cheese.</div><div><span>I like <i>cheese</i>.</span></div>")

+ (values div i))

+

#+LATER

(match (#t(html ("div::content" . #t(regexp+ "^f(o+)" (?o))))

"<div>barbaz</div><div>fooooooobar</div>")