From: Manuel Giraud via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: contovob@tcd.ie, 61394@debbugs.gnu.org
Subject: bug#61394: 30.0.50; [PATCH] Image-dired thumb name based on content
Date: Sun, 12 Feb 2023 00:06:32 +0100 [thread overview]
Message-ID: <87bklzol8n.fsf@ledu-giraud.fr> (raw)
In-Reply-To: <838rh4jlsq.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 11 Feb 2023 16:53:25 +0200")
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So, here is another version of the patch. I'm not quite sure for the
docstring of image-dired-thumb-name.
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From 5cf749b1b321c5f1bd80ae4bb3e1dcf2ba5c02e1 Mon Sep 17 00:00:00 2001
From: Manuel Giraud <manuel@ledu-giraud.fr>
Date: Thu, 9 Feb 2023 19:56:37 +0100
Subject: [PATCH] Image-dired thumb name based on contents
* lisp/image/image-dired-util.el (image-dired-contents-sha1): New
utility that compute the SHA-1 of the first 4KiB of the contents of a
file.
(image-dired-thumb-name): Fix the docstring and use
image-dired-contents-sha1.
---
lisp/image/image-dired-util.el | 23 ++++++++++++++++++-----
1 file changed, 18 insertions(+), 5 deletions(-)
diff --git a/lisp/image/image-dired-util.el b/lisp/image/image-dired-util.el
index c03f9d2e3d3..cde9d0be8d8 100644
--- a/lisp/image/image-dired-util.el
+++ b/lisp/image/image-dired-util.el
@@ -57,18 +57,31 @@ image-dired-dir
(message "Thumbnail directory created: %s" image-dired-dir))
image-dired-dir))
+(defun image-dired-contents-sha1 (filename)
+ "Compute the SHA-1 of the first 4KiB of FILENAME's contents."
+ (with-temp-buffer
+ (insert-file-contents-literally filename nil 0 4096)
+ (sha1 (current-buffer))))
+
(defun image-dired-thumb-name (file)
"Return absolute file name for thumbnail FILE.
Depending on the value of `image-dired-thumbnail-storage', the
file name of the thumbnail will vary:
-- For `use-image-dired-dir', make a SHA1-hash of the image file's
- directory name and add that to make the thumbnail file name
- unique.
-- For `per-directory' storage, just add a subdirectory.
+
+- For `image-dired', make a SHA1-hash the contents of the image
+ FILE with `image-dired-contents-sha1' and append a \".jpg\"
+ extension. This thumbnail will be stored in the
+ `image-dired-dir' directory.
+
+- For `per-directory', append a \".thumb.jpg\" extension to the
+ FILE's name. This thumbnail will be stored in a
+ \".image-dired\" subdirectory into the FILE's directory.
+
- For `standard' storage, produce the file name according to the
Thumbnail Managing Standard. Among other things, an MD5-hash
of the image file's directory name will be added to the
filename.
+
See also `image-dired-thumbnail-storage'."
(let ((file (expand-file-name file)))
(cond ((memq image-dired-thumbnail-storage
@@ -85,7 +98,7 @@ image-dired-thumb-name
((or (eq 'image-dired image-dired-thumbnail-storage)
;; Maintained for backwards compatibility:
(eq 'use-image-dired-dir image-dired-thumbnail-storage))
- (expand-file-name (format "%s.jpg" (sha1 file))
+ (expand-file-name (format "%s.jpg" (image-dired-contents-sha1 file))
(image-dired-dir)))
((eq 'per-directory image-dired-thumbnail-storage)
(expand-file-name (format "%s.thumb.jpg"
--
2.39.1
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--
Manuel Giraud
next prev parent reply other threads:[~2023-02-11 23:06 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-09 19:06 bug#61394: 30.0.50; [PATCH] Image-dired thumb name based on content Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-02-10 15:13 ` Basil Contovounesios via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-02-10 18:46 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-02-11 9:50 ` Eli Zaretskii
2023-02-11 12:30 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-02-11 14:53 ` Eli Zaretskii
2023-02-11 22:33 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-02-11 23:06 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2023-02-12 3:02 ` Stefan Kangas
2023-02-12 21:53 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-02-15 14:19 ` Stefan Kangas
2023-02-15 15:35 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-02-19 14:06 ` Stefan Kangas
2023-02-19 14:43 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-02-19 16:19 ` Stefan Kangas
2023-02-20 9:20 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-02-25 18:45 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-07-26 19:18 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-07-27 7:04 ` Eli Zaretskii
2023-07-27 13:52 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-07-27 14:16 ` Eli Zaretskii
2023-07-27 21:30 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-07-28 6:55 ` Eli Zaretskii
2023-07-28 9:33 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-07-28 12:20 ` Eli Zaretskii
2023-07-28 16:00 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-07-28 18:44 ` Eli Zaretskii
2023-07-29 9:51 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-07-29 10:34 ` Eli Zaretskii
2023-07-29 16:50 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-03 8:43 ` Eli Zaretskii
2023-07-29 10:47 ` Michael Albinus
2023-07-31 15:53 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-01 17:05 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-02 11:42 ` Eli Zaretskii
2023-08-02 18:00 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-02 18:16 ` Eli Zaretskii
2023-08-03 11:10 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-03 11:38 ` Eli Zaretskii
2023-08-03 16:51 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-03 18:30 ` Eli Zaretskii
2023-08-04 7:44 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-04 10:55 ` Eli Zaretskii
2023-08-04 13:37 ` Manuel Giraud via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-04 14:05 ` Eli Zaretskii
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