eww.el: Patch to cache the parse tree

[T.V. Raman]

Hi,

I'd like  to add some code to eww.el so that the parsed document
is cached ( -- this will enable  functionality such as document
filtering etc (see
http://emacspeak.googlecode.com/svn/trunk/lisp/shr-url.el) for
similar functionality that I originally built using bare shr.

Here is a patch against Master:

git diff master
diff --git a/lisp/net/eww.el b/lisp/net/eww.el
index 86e0977..a446a01 100644
--- a/lisp/net/eww.el
+++ b/lisp/net/eww.el
@@ -89,6 +89,9 @@
   :group 'eww)

 (defvar eww-current-url nil)
+(defvar eww-current-dom nil)
+(make-variable-buffer-local 'eww-current-dom)
+
 (defvar eww-current-title ""
   "Title of current page.")
 (defvar eww-history nil)
@@ -208,6 +211,7 @@ word(s) will be searched for via `eww-search-prefix'."
                  (start end &optional base-url))

 (defun eww-display-html (charset url)
+  (declare (special eww-current-dom))
   (or (fboundp 'libxml-parse-html-region)
       (error "This function requires Emacs to be compiled with libxml2"))
   (unless (eq charset 'utf8)
@@ -219,6 +223,7 @@ word(s) will be searched for via `eww-search-prefix'."
          'base (list (cons 'href url))
          (libxml-parse-html-region (point) (point-max)))))
     (eww-setup-buffer)
+    (setq eww-current-dom document)
     (let ((inhibit-read-only t)
          (after-change-functions nil)
          (shr-width nil)
@@ -387,9 +392,11 @@ word(s) will be searched for via `eww-search-prefix'."
   )

 (defun eww-save-history ()
+  (declare (special ew-current-dom))
   (push (list :url eww-current-url
              :title eww-current-title
              :point (point)
+              :dom eww-current-dom
              :text (buffer-string))
        eww-history))

@@ -427,6 +434,7 @@ word(s) will be searched for via `eww-search-prefix'."
   (let ((inhibit-read-only t))
     (erase-buffer)
     (insert (plist-get elem :text))
+    (setq eww-current-dom (plist-get elem :dom))
     (goto-char (plist-get elem :point))
     (setq eww-current-url (plist-get elem :url)
          eww-current-title (plist-get elem :title))))
09:05:43 raman-glaptop net $
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