* dired: More verbose subdir headers; show #files in subdir
@ 2016-09-09 17:50 Tino Calancha
0 siblings, 0 replies; only message in thread
From: Tino Calancha @ 2016-09-09 17:50 UTC (permalink / raw
To: Emacs developers
Drew Adams define in files+ Dired header lines with information
on the number of files (see patch below).
Following shows the Emacs (1) and files+ (2) header lines for
my home directory:
1) total used in directory 87648 available 372113104
2) files 226/226 space used 87648 available 372086532
Where in X/Y, X is the number of files in the current subdir;
Y is the number of files in default-directory: in this example,
both numbers are the same because default-directory and
(dired-current-directory) are the same.
Note that the entries '.' and '..' are not counted.
If you have some directories in the listing you might try:
> i
then, another subdirectory will be added.
In my case, the header line for that subdir is:
files 0/226 space used 44K available 372086532
The 0 means that the directory is empty (i.e., just '.' and '..').
I like showing X in the Dired header line. I think is nice if Emacs
add this feature.
I am not sure about the convenience of showing Y though. Most of
the times i just look at X and ignore Y. Furthermore, for Dired buffers
with just one subdir you get X/X which looks strange, specially
when you have many files.
For example, if i visit /usr/bin with Dired the header line is:
files 2349/2349 space used 376M available 41182232
Do you like adding # files info in the Dired header lines?
What is your opinion?
Tino
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From 5fdde63547761dc2ea226b3ac6df3ffab576234c Mon Sep 17 00:00:00 2001
From: Tino Calancha <tino.calancha@gmail.com>
Date: Sat, 10 Sep 2016 02:42:12 +0900
Subject: [PATCH] dired: More verbose subdir headers
* lisp/files (count-dired-files): New defun; return the
number of files in the current directory listing.
(insert-directory): Add in each Dired header line the number of files
in the current subdir and the total number of files in default-directory.
(update-dired-files-count): New defun; update file count in each Dired
header line.
---
lisp/files.el | 82
++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 75 insertions(+), 7 deletions(-)
diff --git a/lisp/files.el b/lisp/files.el
index 4bd708d..dce69a2 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -6431,6 +6431,59 @@ directory-listing-before-filename-regexp
(defvar insert-directory-ls-version 'unknown)
+(defun count-dired-files ()
+ "Returns the number of files in the current Dired directory listing.
+This includes directory entries, as well as files, but it excludes `.'
+and `..'."
+ (save-excursion
+ (when (save-restriction (widen) (eobp)) (goto-char (1- (point))))
+ (re-search-backward "^$" nil 'to-bob)
+ (if (not (re-search-forward dired-move-to-filename-regexp nil t))
+ 0
+ (let* ((beg (line-beginning-position))
+ (end (save-excursion (re-search-forward "^$" nil t)))
+ (dots-p (save-excursion ; Is `..' present?
+ (goto-char beg)
+ (re-search-forward
+ (concat directory-listing-before-filename-regexp
+ "\\.\\./?$")
+ end t))))
+ (if dots-p (- (count-lines beg end) 2) (count-lines beg end))))))
+
+(add-hook 'dired-after-readin-hook 'update-dired-files-count)
+(defun update-dired-files-count ()
+ "Update file count in Dired header for each directory listed."
+ (save-restriction
+ (widen)
+ (let* ((num-files (count-dired-files))
+ (str-num-files (number-to-string num-files)))
+ (save-excursion
+ (goto-char (point-min))
+ (while (re-search-forward "^ files \\([0-9]+\\)/\\([0-9]+\\)"
nil t)
+ ;; No-op if the line should be hidden.
+ (unless (eq (get-text-property (match-beginning 0) 'invisible)
+ 'dired-hide-details-information)
+ (let ((buffer-read-only nil)
+ (map (make-sparse-keymap)))
+ (define-key map [mouse-2]
'dired-mouse-describe-listed-directory)
+ (define-key map "\r" 'dired-describe-listed-directory)
+ (replace-match str-num-files nil nil nil 1)
+ (replace-match (if (zerop num-files)
+ str-num-files
+ (number-to-string (- (length
(directory-files
+
default-directory
+ nil nil t))
+ 2)))
+ nil nil nil 2)
+ ;; Ignore any error, e.g. from `dired-details.el' hiding
text.
+ (condition-case nil
+ (add-text-properties
+ (save-excursion (beginning-of-line) (+ 2 (point)))
(match-end 2)
+ `(mouse-face highlight keymap ,map
+ help-echo "Files in subdir / files in
default-directory"))
+ (error nil)))))
+ (set-buffer-modified-p nil)))))
+
;; insert-directory
;; - must insert _exactly_one_line_ describing FILE if WILDCARD and
;; FULL-DIRECTORY-P is nil.
@@ -6706,13 +6759,28 @@ insert-directory
(save-excursion
(goto-char beg)
;; First find the line to put it on.
- (when (re-search-forward "^ *\\(total\\)" nil t)
- (let ((available (get-free-disk-space ".")))
- (when available
- ;; Replace "total" with "used", to avoid confusion.
- (replace-match "total used in directory" nil nil nil
1)
- (end-of-line)
- (insert " available " available))))))))))
+ (while (re-search-forward "^ *\\(total\\)" nil t)
+ (goto-char (match-beginning 1))
+ (insert "files " (number-to-string (save-match-data
+
(count-dired-files)))
+ "/" (number-to-string
+ (- (length (directory-files
default-directory
+ nil nil t))
2))
+ " ")
+ (goto-char beg)
+ (re-search-forward "^ *files [0-9]+/[0-9]+ \\(total\\)"
nil t)
+ (replace-match "space used" nil nil nil 1)
+ (let ((available (and (fboundp 'get-free-disk-space)
+ (get-free-disk-space ".")))
+ (map (make-sparse-keymap)))
+ (define-key map [mouse-2]
'dired-mouse-describe-listed-directory)
+ (define-key map "\r"
'dired-describe-listed-directory)
+ (when available (end-of-line) (insert " available "
available))
+ (add-text-properties (line-beginning-position)
+ (1- (match-beginning 1))
+ `(mouse-face highlight keymap
,map
+ help-echo "Files in
subdir / files in \
+default-directory"))))))))))
(defun insert-directory-adj-pos (pos error-lines)
"Convert `ls --dired' file name position value POS to a buffer
position.
--
2.9.3
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
In GNU Emacs 25.1.50.1 (x86_64-pc-linux-gnu, GTK+ Version 3.21.5)
of 2016-09-08 built on calancha-pc
Repository revision: 367f8568bc9e759ebdfb423648891efa0346456b
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2016-09-09 17:50 dired: More verbose subdir headers; show #files in subdir Tino Calancha
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