bug#24893: 26.0.50; shr doesn't parse srcset <img> correctly

[Katsumi Yamaoka]

On Mon, 07 Nov 2016 12:11:51 +0100, Lars Ingebrigtsen wrote:
> (shr--preferred-image
[...]
> => "
> "
> I'm guessing it's the newlines or something that's the problem.  Or the
> protocol-less URLs?  I haven't examined.

Though this is no more than a workaround:

--- shr.el~     2016-11-04 10:32:58.932040100 +0000
+++ shr.el      2016-11-08 05:54:35.912122700 +0000
@@ -1529,7 +1529,7 @@
       (setq srcset
             (sort (mapcar
                    (lambda (elem)
-                     (let ((spec (split-string elem " ")))
+                     (let ((spec (split-string elem "[\t\n ]+")))
                        (cond
                         ((= (length spec) 1)
                          ;; Make sure it's well formed.
@@ -1543,7 +1543,9 @@
                         (t
                          (list (car spec)
                                (string-to-number (cadr spec)))))))
-                   (split-string srcset ", "))
+                   (split-string (replace-regexp-in-string
+                                 "\\`[\t\n ]+\\|[\t\n ]+\\'" "" srcset)
+                                "[\t\n ]*,[\t\n ]*"))
                   (lambda (e1 e2)
                     (> (cadr e1) (cadr e2)))))
       ;; Choose the smallest picture that's bigger than the current