Function: image-fit-to-window

image-fit-to-window is a byte-compiled function defined in image-mode.el.gz.

Signature

(image-fit-to-window WINDOW)

Documentation

Adjust size of image to display it exactly in WINDOW boundaries.

Source Code

;; Defined in /usr/src/emacs/lisp/image-mode.el.gz
(defun image-fit-to-window (window)
  "Adjust size of image to display it exactly in WINDOW boundaries."
  (when (window-live-p window)
    (with-current-buffer (window-buffer window)
      (when (derived-mode-p 'image-mode)
        (let ((spec (image-get-display-property)))
          (when (eq (car-safe spec) 'image)
            (let* ((image-width  (plist-get (cdr spec) :max-width))
                   (image-height (plist-get (cdr spec) :max-height))
                   (edges (window-inside-pixel-edges window))
                   (window-width  (- (nth 2 edges) (nth 0 edges)))
                   (window-height (- (nth 3 edges) (nth 1 edges))))
              ;; If the size has been changed manually (with `+'/`-'),
              ;; then :max-width/:max-height is nil.  In that case, do
              ;; no automatic resizing.
              (when (and image-width image-height
                         ;; Don't do resizing if we have a manual
                         ;; rotation (from the `r' command), either.
                         (not (plist-get (cdr spec) :rotation))
                         (or (not (= image-width  window-width))
                             (not (= image-height window-height))))
                (unless image-fit-to-window-lock
                  (unwind-protect
                      (progn
                        (setq-local image-fit-to-window-lock t)
                        (ignore-error 'remote-file-error
                          (image-toggle-display-image)))
                    (setq image-fit-to-window-lock nil)))))))))))