Show image as text when trying to search/replace in image buffer (bug#25905)

* lisp/image-mode.el (image-mode-isearch-filter): New function.
(image-mode--setup-mode): Use it to add it as :before-while to
isearch-filter-predicate.

1 files changed, 11 insertions, 0 deletions

diff --git a/lisp/image-mode.el b/lisp/image-mode.el
index 465bf867627..143b68f52e7 100644
--- a/lisp/image-mode.el
+++ b/lisp/image-mode.el
@@ -667,6 +667,9 @@ Key bindings:
   (when image-auto-resize-on-window-resize
     (add-hook 'window-state-change-functions #'image--window-state-change nil t))
 
+  (add-function :before-while (local 'isearch-filter-predicate)
+                #'image-mode-isearch-filter)
+
   (run-mode-hooks 'image-mode-hook)
   (let ((image (image-get-display-property))
         (msg1 (substitute-command-keys
@@ -782,6 +785,14 @@ Remove text properties that display the image."
     (if (called-interactively-p 'any)
         (message "Repeat this command to go back to displaying the image"))))
 
+(defun image-mode-isearch-filter (_beg _end)
+  "Show image as text when trying to search/replace in the image buffer."
+  (save-match-data
+    (when (and (derived-mode-p 'image-mode)
+               (image-get-display-property))
+      (image-mode-as-text)))
+  t)
+
 (defvar archive-superior-buffer)
 (defvar tar-superior-buffer)
 (declare-function image-flush "image.c" (spec &optional frame))