* lisp/dom.el (dom-previous-sibling): New function.

[gnu-emacs] / lisp / dom.el

diff --git a/lisp/dom.el b/lisp/dom.el
index 6b24e4ffa91c79fc30dd0ab2fc0d4e8bc5b5ae2f..42131073a04e2a5e0591bf0fc2e48ec10c1f5886 100644 (file)
--- a/lisp/dom.el
+++ b/lisp/dom.el
@@ -1,6 +1,6 @@
 ;;; dom.el --- XML/HTML (etc.) DOM manipulation and searching functions
 
-;; Copyright (C) 2014 Free Software Foundation, Inc.
+;; Copyright (C) 2014-2015 Free Software Foundation, Inc.
 
 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
 ;; Keywords: xml, html
@@ -103,6 +103,14 @@ A name is a symbol like `td'."
        (cons dom matches)
       matches)))
 
+(defun dom-strings (dom)
+  "Return elements in DOM that are strings."
+  (cl-loop for child in (dom-children dom)
+          if (stringp child)
+          collect child
+          else
+          append (dom-strings child)))
+
 (defun dom-by-class (dom match)
   "Return elements in DOM that have a class name that matches regexp MATCH."
   (dom-elements dom 'class match))
@@ -141,6 +149,16 @@ ATTRIBUTE would typically be `class', `id' or the like."
          (setq result (dom-parent elem node))))
       result)))
 
+(defun dom-previous-sibling (dom node)
+  (when-let (parent (dom-parent dom node))
+    (let ((siblings (dom-children parent))
+         (previous nil))
+      (while siblings
+       (when (eq (cadr siblings) node)
+         (setq previous (car siblings)))
+       (pop siblings))
+      previous)))
+
 (defun dom-node (tag &optional attributes &rest children)
   "Return a DOM node with TAG and ATTRIBUTES."
   (if children