@kbd{w} calls @code{eww-copy-page-url}, which will copy the current
page's URL to the kill ring instead.
+@findex eww-copy-alternate-url
+@kindex A
+ The @kbd{A} command (@code{eww-copy-alternate-url}) copies the URL
+of an alternate link of the current page into the kill ring. If the
+page specifies multiple alternate links, this command prompts for one
+of them in the minibuffer, with completion. Alternate links are
+references that an @acronym{HTML} page may include to point to other
+documents that act as its alternative representations. Notably,
+@acronym{HTML} pages can use alternate links to point to their
+translated versions and to @acronym{RSS} feeds. Alternate links
+appear in the @samp{<head>} section of @acronym{HTML} pages as
+@samp{<link>} elements with @samp{rel} attribute equal to
+@samp{``alternate''}, they are part of the page's metadata and are not
+visible in its rendered content.
+
@findex eww-open-in-new-buffer
@kindex M-RET
The @kbd{M-@key{RET}} command (@code{eww-open-in-new-buffer}) opens the
"&" #'eww-browse-with-external-browser
"d" #'eww-download
"w" #'eww-copy-page-url
+ "A" #'eww-copy-alternate-url
"C" #'url-cookie-list
"v" #'eww-view-source
"R" #'eww-readable
(provide 'eww)
+;;; Alternate links (RSS and Atom feeds, etc.)
+
+(defun eww--alternate-urls (dom &optional base)
+ "Return an alist of alternate links in DOM.
+
+Each element is a list of the form (URL TYPE TITLE) where URL is
+the href attribute of the link expanded relative to BASE, TYPE is
+its type attribute, and TITLE is its title attribute. If any of
+these attributes is absent, the corresponding element is nil."
+ (let ((alternates
+ (seq-filter
+ (lambda (attrs) (string= (alist-get 'rel attrs)
+ "alternate"))
+ (mapcar #'dom-attributes (dom-by-tag dom 'link)))))
+ (mapcar (lambda (alternate)
+ (list (url-expand-file-name (alist-get 'href alternate)
+ base)
+ (alist-get 'type alternate)
+ (alist-get 'title alternate)))
+ alternates)))
+
+(defun eww-read-alternate-url ()
+ "Get the URL of an alternate link of this page.
+
+If there is just one alternate link, return its URL. If there
+are multiple alternate links, prompt for one in the minibuffer
+with completion. If there are none, return nil."
+ (when-let ((alternates (eww--alternate-urls
+ (plist-get eww-data :dom)
+ (plist-get eww-data :url))))
+ (let ((url-max-width
+ (seq-max (mapcar #'string-pixel-width
+ (mapcar #'car alternates))))
+ (title-max-width
+ (seq-max (mapcar #'string-pixel-width
+ (mapcar #'caddr alternates))))
+ (sep-width (string-pixel-width " ")))
+ (if (cdr alternates)
+ (let ((completion-extra-properties
+ (list :annotation-function
+ (lambda (feed)
+ (let* ((attrs (alist-get feed
+ alternates
+ nil
+ nil
+ #'string=))
+ (type (car attrs))
+ (title (cadr attrs)))
+ (concat
+ (propertize " " 'display
+ `(space :align-to
+ (,(+ sep-width
+ url-max-width))))
+ title
+ (when type
+ (concat
+ (propertize " " 'display
+ `(space :align-to
+ (,(+ (* 2 sep-width)
+ url-max-width
+ title-max-width))))
+ "[" type "]"))))))))
+ (completing-read "Alternate URL: " alternates nil t))
+ (caar alternates)))))
+
+(defun eww-copy-alternate-url ()
+ "Copy an alternate URL of the current page into the kill ring.
+
+Alternate links are references that an HTML page may include to
+point to its alternative representations, such as a translated
+version or an RSS feed."
+ (interactive nil eww-mode)
+ (if-let ((url (eww-read-alternate-url)))
+ (progn
+ (kill-new url)
+ (message "Copied %s to kill ring" url))
+ (user-error "No alternate links found on this page!")))
+
;;; eww.el ends here
projects / emacs.git / commitdiff