Put command line file names and mouse dragging onto 'file-name-history'

* lisp/dnd.el (dnd-open-local-file): Add file to history.
* lisp/files.el (file-name-history--add): New function (bug#12915).

* lisp/startup.el (command-line-1): Add file to history.

4 files changed, 14 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 7bf42330b9d..922b2ab6eb3 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -92,6 +92,10 @@ proper pty support that Emacs needs.
 * Startup Changes in Emacs 28.1
 
 ---
+** File names given on the command line will now be pushed onto
+'file-name-history'.
+
+---
 ** In GTK builds, Emacs now supports startup notification.
 This means that Emacs won't steal keyboard focus upon startup
 (when started via the Desktop) if the user is typing into another
@@ -335,6 +339,10 @@ by dragging the tab lines of their topmost windows with the mouse.
 
 * Editing Changes in Emacs 28.1
 
+---
+** Dragging a file to Emacs will now also push the name of the file
+onto 'file-name-history'.
+
 +++
 ** A prefix arg now causes 'delete-other-frames' to only iconify frames.
 
diff --git a/lisp/dnd.el b/lisp/dnd.el
index 7319a27d190..e641b2843a9 100644
--- a/lisp/dnd.el
+++ b/lisp/dnd.el
@@ -180,6 +180,7 @@ An alternative for systems that do not support unc file names is
           (if dnd-open-file-other-window
               (find-file-other-window f)
             (find-file f))
+          (file-name-history--add f)
           'private)
       (error "Can not read %s" uri))))
 
diff --git a/lisp/files.el b/lisp/files.el
index 59077cd266a..c265f33550f 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -1702,6 +1702,10 @@ rather than FUN itself, to `minibuffer-setup-hook'."
   (list (read-file-name prompt nil default-directory mustmatch)
         t))
 
+(defun file-name-history--add (file)
+  "Add FILE to `file-name-history'."
+  (add-to-history 'file-name-history (abbreviate-file-name file)))
+
 (defun find-file (filename &optional wildcards)
   "Edit file FILENAME.
 Switch to a buffer visiting file FILENAME,
diff --git a/lisp/startup.el b/lisp/startup.el
index 456c01efd13..f337f7c6bcf 100644
--- a/lisp/startup.el
+++ b/lisp/startup.el
@@ -2391,6 +2391,7 @@ nil default-directory" name)
                                   (command-line-normalize-file-name name)
                                   dir))
                            (buf (find-file-noselect file)))
+                      (file-name-history--add file)
                       (setq displayable-buffers (cons buf displayable-buffers))
                       ;; Set the file buffer to the current buffer so
                       ;; that it will be used with "--eval" and