Re: HTML img tags

[Konstantin Shakhnov]

On Sat, Dec 10, 2016 at 10:53:02AM -0600, Hikaru Ichijyo wrote:
> Is there a mode, or some bit of Lisp code I can put in ~/.emacs, that
> will let Emacs guess the width= and height= attributes of an image file
> from the image itself when I create an img tag in HTML?  I realize
> there's probably no way for Emacs to do that without calling external
> programs as a subprocess, so it's unlikely, but it would certainly be
> convenient, and there are some HTML authoring programs that will do that
> for you.  The old KDE 3 app Quanta Plus did, but I'd rather do
> everything in Emacs.

If you have imagemagic this will work:

(defun my-insert-html-image-tag (filename)
  "Insert html tag for image file"
  (interactive "fFile name: ")
  (insert
   (format "<img src=\"%s\" %s />"
           filename
           (replace-regexp-in-string
            "\n" ""
            (shell-command-to-string
            (format "identify %s | sed -r 's/^.* ([0-9]+)x([0-9]+) .*/width=\\1 
heght=\\2/'" filename))))))