* net/tramp-cache.el (tramp-flush-file-function): Wrap the code
[emacs.git] / lisp / image-dired.el
1 ;;; image-dired.el --- use dired to browse and manipulate your images
2 ;;
3 ;; Copyright (C) 2005-2014 Free Software Foundation, Inc.
4 ;;
5 ;; Version: 0.4.11
6 ;; Keywords: multimedia
7 ;; Author: Mathias Dahl <mathias.rem0veth1s.dahl@gmail.com>
8
9 ;; This file is part of GNU Emacs.
10
11 ;; GNU Emacs is free software: you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation, either version 3 of the License, or
14 ;; (at your option) any later version.
15
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19 ;; GNU General Public License for more details.
20
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
23
24 ;;; Commentary:
25 ;;
26 ;; BACKGROUND
27 ;; ==========
28 ;;
29 ;;  I needed a program to browse, organize and tag my pictures.  I got
30 ;; tired of the old gallery program I used as it did not allow
31 ;; multi-file operations easily.  Also, it put things out of my
32 ;; control.  Image viewing programs I tested did not allow multi-file
33 ;; operations or did not do what I wanted it to.
34 ;;
35 ;;  So, I got the idea to use the wonderful functionality of Emacs and
36 ;; `dired' to do it.  It would allow me to do almost anything I wanted,
37 ;; which is basically just to browse all my pictures in an easy way,
38 ;; letting me manipulate and tag them in various ways.  `dired' already
39 ;; provide all the file handling and navigation facilities; I only
40 ;; needed to add some functions to display the images.
41 ;;
42 ;;  I briefly tried out thumbs.el, and although it seemed more
43 ;; powerful than this package, it did not work the way I wanted to.  It
44 ;; was too slow to created thumbnails of all files in a directory (I
45 ;; currently keep all my 2000+ images in the same directory) and
46 ;; browsing the thumbnail buffer was slow too.  image-dired.el will not
47 ;; create thumbnails until they are needed and the browsing is done
48 ;; quickly and easily in dired.  I copied a great deal of ideas and
49 ;; code from there though... :)
50 ;;
51 ;;  `image-dired' stores the thumbnail files in `image-dired-dir'
52 ;; using the file name format ORIGNAME.thumb.ORIGEXT.  For example
53 ;; ~/.emacs.d/image-dired/myimage01.thumb.jpg.  The "database" is for
54 ;; now just a plain text file with the following format:
55 ;;
56 ;; file-name-non-directory;comment:comment-text;tag1;tag2;tag3;...;tagN
57 ;;
58 ;;
59 ;; PREREQUISITES
60 ;; =============
61 ;;
62 ;; * The ImageMagick package.  Currently, `convert' and `mogrify' are
63 ;; used.  Find it here: http://www.imagemagick.org.
64 ;;
65 ;; * For non-lossy rotation of JPEG images, the JpegTRAN program is
66 ;; needed.
67 ;;
68 ;; * For `image-dired-get-exif-data' and `image-dired-write-exif-data' to work,
69 ;; the command line tool `exiftool' is needed.  It can be found here:
70 ;; http://www.sno.phy.queensu.ca/~phil/exiftool/.  These two functions
71 ;; are, among other things, used for writing comments to image files
72 ;; using `image-dired-thumbnail-set-image-description' and to create
73 ;; "unique" file names using `image-dired-get-exif-file-name' (used by
74 ;; `image-dired-copy-with-exif-file-name').
75 ;;
76 ;;
77 ;; USAGE
78 ;; =====
79 ;;
80 ;; This information has been moved to the manual.  Type `C-h r' to open
81 ;; the Emacs manual and go to the node Thumbnails by typing `g
82 ;; Thumbnails RET'.
83 ;;
84 ;; Quickstart: M-x image-dired RET DIRNAME RET
85 ;;
86 ;; where DIRNAME is a directory containing image files.
87 ;;
88 ;; LIMITATIONS
89 ;; ===========
90 ;;
91 ;; * Supports all image formats that Emacs and convert supports, but
92 ;; the thumbnails are hard-coded to JPEG format.
93 ;;
94 ;; * WARNING: The "database" format used might be changed so keep a
95 ;; backup of `image-dired-db-file' when testing new versions.
96 ;;
97 ;;
98 ;; TODO
99 ;; ====
100 ;;
101 ;; * Support gallery creation when using per-directory thumbnail
102 ;; storage.
103 ;;
104 ;; * Some sort of auto-rotate function based on rotate info in the
105 ;; EXIF data.
106 ;;
107 ;; * Check if exiftool exist before trying to call it to give a better
108 ;; error message.
109 ;;
110 ;; * Investigate if it is possible to also write the tags to the image
111 ;; files.
112 ;;
113 ;; * From thumbs.el: Add an option for clean-up/max-size functionality
114 ;;   for thumbnail directory.
115 ;;
116 ;; * From thumbs.el: Add setroot function.
117 ;;
118 ;; * From thumbs.el: Add image resizing, if useful (image-dired's automatic
119 ;;  "image fit" might be enough)
120 ;;
121 ;; * From thumbs.el: Add the "modify" commands (emboss, negate,
122 ;;   monochrome etc).
123 ;;
124 ;; * Asynchronous creation of thumbnails.
125 ;;
126 ;; * Add `image-dired-display-thumbs-ring' and functions to cycle that.  Find
127 ;; out which is best, saving old batch just before inserting new, or
128 ;; saving the current batch in the ring when inserting it.  Adding it
129 ;; probably needs rewriting `image-dired-display-thumbs' to be more general.
130 ;;
131 ;; * Find some way of toggling on and off really nice keybindings in
132 ;; dired (for example, using C-n or <down> instead of C-S-n).  Richard
133 ;; suggested that we could keep C-t as prefix for image-dired commands
134 ;; as it is currently not used in dired.  He also suggested that
135 ;; `dired-next-line' and `dired-previous-line' figure out if
136 ;; image-dired is enabled in the current buffer and, if it is, call
137 ;; `image-dired-dired-next-line' and
138 ;; `image-dired-dired-previous-line', respectively.  Update: This is
139 ;; partly done; some bindings have now been added to dired.
140 ;;
141 ;; * Enhanced gallery creation with basic CSS-support and pagination
142 ;; of tag pages with many pictures.
143 ;;
144 ;; * Rewrite `image-dired-modify-mark-on-thumb-original-file' to be
145 ;; less ugly.
146 ;;
147 ;; * In some way keep track of buffers and windows and stuff so that
148 ;; it works as the user expects.
149 ;;
150 ;; * More/better documentation
151 ;;
152 ;;
153 ;;; Code:
154
155 (require 'dired)
156 (require 'format-spec)
157 (require 'widget)
158
159 (require 'cl-lib)
160
161 (eval-when-compile
162   (require 'wid-edit))
163
164 (defgroup image-dired nil
165   "Use dired to browse your images as thumbnails, and more."
166   :prefix "image-dired-"
167   :group 'multimedia)
168
169 (defcustom image-dired-dir (locate-user-emacs-file "image-dired/")
170   "Directory where thumbnail images are stored."
171   :type 'string
172   :group 'image-dired)
173
174 (defcustom image-dired-thumbnail-storage 'use-image-dired-dir
175   "How to store image-dired's thumbnail files.
176 Image-Dired can store thumbnail files in one of two ways and this is
177 controlled by this variable.  \"Use image-dired dir\" means that the
178 thumbnails are stored in a central directory.  \"Per directory\"
179 means that each thumbnail is stored in a subdirectory called
180 \".image-dired\" in the same directory where the image file is.
181 \"Thumbnail Managing Standard\" means that the thumbnails are
182 stored and generated according to the Thumbnail Managing Standard
183 that allows sharing of thumbnails across different programs."
184   :type '(choice :tag "How to store thumbnail files"
185                  (const :tag "Thumbnail Managing Standard" standard)
186                  (const :tag "Use image-dired-dir" use-image-dired-dir)
187                  (const :tag "Per-directory" per-directory))
188   :group 'image-dired)
189
190 (defcustom image-dired-db-file
191   (expand-file-name ".image-dired_db" image-dired-dir)
192   "Database file where file names and their associated tags are stored."
193   :type 'string
194   :group 'image-dired)
195
196 (defcustom image-dired-temp-image-file
197   (expand-file-name ".image-dired_temp" image-dired-dir)
198   "Name of temporary image file used by various commands."
199   :type 'string
200   :group 'image-dired)
201
202 (defcustom image-dired-gallery-dir
203   (expand-file-name ".image-dired_gallery" image-dired-dir)
204   "Directory to store generated gallery html pages.
205 This path needs to be \"shared\" to the public so that it can access
206 the index.html page that image-dired creates."
207   :type 'string
208   :group 'image-dired)
209
210 (defcustom image-dired-gallery-image-root-url
211 "http://your.own.server/image-diredpics"
212   "URL where the full size images are to be found.
213 Note that this path has to be configured in your web server.  Image-Dired
214 expects to find pictures in this directory."
215   :type 'string
216   :group 'image-dired)
217
218 (defcustom image-dired-gallery-thumb-image-root-url
219 "http://your.own.server/image-diredthumbs"
220   "URL where the thumbnail images are to be found.
221 Note that this path has to be configured in your web server.  Image-Dired
222 expects to find pictures in this directory."
223   :type 'string
224   :group 'image-dired)
225
226 (defcustom image-dired-cmd-create-thumbnail-program
227   "convert"
228   "Executable used to create thumbnail.
229 Used together with `image-dired-cmd-create-thumbnail-options'."
230   :type 'string
231   :group 'image-dired)
232
233 (defcustom image-dired-cmd-create-thumbnail-options
234   "%p -size %wx%h \"%f\" -resize \"%wx%h>\" -strip jpeg:\"%t\""
235   "Format of command used to create thumbnail image.
236 Available options are %p which is replaced by
237 `image-dired-cmd-create-thumbnail-program', %w which is replaced by
238 `image-dired-thumb-width', %h which is replaced by `image-dired-thumb-height',
239 %f which is replaced by the file name of the original image and %t
240 which is replaced by the file name of the thumbnail file."
241   :type 'string
242   :group 'image-dired)
243
244 (defcustom image-dired-cmd-create-temp-image-program
245   "convert"
246   "Executable used to create temporary image.
247 Used together with `image-dired-cmd-create-temp-image-options'."
248   :type 'string
249   :group 'image-dired)
250
251 (defcustom image-dired-cmd-create-temp-image-options
252   "%p -size %wx%h \"%f\" -resize \"%wx%h>\" -strip jpeg:\"%t\""
253   "Format of command used to create temporary image for display window.
254 Available options are %p which is replaced by
255 `image-dired-cmd-create-temp-image-program', %w and %h which is replaced by
256 the calculated max size for width and height in the image display window,
257 %f which is replaced by the file name of the original image and %t which
258 is replaced by the file name of the temporary file."
259   :type 'string
260   :group 'image-dired)
261
262 (defcustom image-dired-cmd-pngnq-program (executable-find "pngnq")
263   "The file name of the `pngnq' program.
264 It quantizes colors of PNG images down to 256 colors."
265   :type '(choice (const :tag "Not Set" nil) string)
266   :group 'image-dired)
267
268 (defcustom image-dired-cmd-pngcrush-program (executable-find "pngcrush")
269   "The file name of the `pngcrush' program.
270 It optimizes the compression of PNG images.  Also it adds PNG textual chunks
271 with the information required by the Thumbnail Managing Standard."
272   :type '(choice (const :tag "Not Set" nil) string)
273   :group 'image-dired)
274
275 (defcustom image-dired-cmd-create-standard-thumbnail-command
276   (concat
277    image-dired-cmd-create-thumbnail-program " "
278    "-size %wx%h \"%f\" "
279    (unless (or image-dired-cmd-pngcrush-program image-dired-cmd-pngnq-program)
280      (concat
281       "-set \"Thumb::MTime\" \"%m\" "
282       "-set \"Thumb::URI\" \"file://%f\" "
283       "-set \"Description\" \"Thumbnail of file://%f\" "
284       "-set \"Software\" \"" (emacs-version) "\" "))
285    "-thumbnail \"%wx%h>\" png:\"%t\""
286    (if image-dired-cmd-pngnq-program
287        (concat
288         " ; " image-dired-cmd-pngnq-program " -f \"%t\""
289         (unless image-dired-cmd-pngcrush-program
290           " ; mv %q %t")))
291    (if image-dired-cmd-pngcrush-program
292        (concat
293         (unless image-dired-cmd-pngcrush-program
294           " ; cp %t %q")
295         " ; " image-dired-cmd-pngcrush-program " -q "
296         "-text b \"Description\" \"Thumbnail of file://%f\" "
297         "-text b \"Software\" \"" (emacs-version) "\" "
298         ;; "-text b \"Thumb::Image::Height\" \"%oh\" "
299         ;; "-text b \"Thumb::Image::Mimetype\" \"%mime\" "
300         ;; "-text b \"Thumb::Image::Width\" \"%ow\" "
301         "-text b \"Thumb::MTime\" \"%m\" "
302         ;; "-text b \"Thumb::Size\" \"%b\" "
303         "-text b \"Thumb::URI\" \"file://%f\" "
304         "%q %t"
305         " ; rm %q")))
306   "Command to create thumbnails according to the Thumbnail Managing Standard."
307   :type 'string
308   :group 'image-dired)
309
310 (defcustom image-dired-cmd-rotate-thumbnail-program
311   "mogrify"
312   "Executable used to rotate thumbnail.
313 Used together with `image-dired-cmd-rotate-thumbnail-options'."
314   :type 'string
315   :group 'image-dired)
316
317 (defcustom image-dired-cmd-rotate-thumbnail-options
318   "%p -rotate %d \"%t\""
319   "Format of command used to rotate thumbnail image.
320 Available options are %p which is replaced by
321 `image-dired-cmd-rotate-thumbnail-program', %d which is replaced by the
322 number of (positive) degrees to rotate the image, normally 90 or 270
323 \(for 90 degrees right and left), %t which is replaced by the file name
324 of the thumbnail file."
325   :type 'string
326   :group 'image-dired)
327
328 (defcustom image-dired-cmd-rotate-original-program
329   "jpegtran"
330   "Executable used to rotate original image.
331 Used together with `image-dired-cmd-rotate-original-options'."
332   :type 'string
333   :group 'image-dired)
334
335 (defcustom image-dired-cmd-rotate-original-options
336   "%p -rotate %d -copy all -outfile %t \"%o\""
337   "Format of command used to rotate original image.
338 Available options are %p which is replaced by
339 `image-dired-cmd-rotate-original-program', %d which is replaced by the
340 number of (positive) degrees to rotate the image, normally 90 or
341 270 \(for 90 degrees right and left), %o which is replaced by the
342 original image file name and %t which is replaced by
343 `image-dired-temp-image-file'."
344   :type 'string
345   :group 'image-dired)
346
347 (defcustom image-dired-temp-rotate-image-file
348   (expand-file-name ".image-dired_rotate_temp" image-dired-dir)
349   "Temporary file for rotate operations."
350   :type 'string
351   :group 'image-dired)
352
353 (defcustom image-dired-rotate-original-ask-before-overwrite t
354   "Confirm overwrite of original file after rotate operation.
355 If non-nil, ask user for confirmation before overwriting the
356 original file with `image-dired-temp-rotate-image-file'."
357   :type 'boolean
358   :group 'image-dired)
359
360 (defcustom image-dired-cmd-write-exif-data-program
361   "exiftool"
362   "Program used to write EXIF data to image.
363 Used together with `image-dired-cmd-write-exif-data-options'."
364   :type 'string
365   :group 'image-dired)
366
367 (defcustom image-dired-cmd-write-exif-data-options
368   "%p -%t=\"%v\" \"%f\""
369   "Format of command used to write EXIF data.
370 Available options are %p which is replaced by
371 `image-dired-cmd-write-exif-data-program', %f which is replaced by
372 the image file name, %t which is replaced by the tag name and %v
373 which is replaced by the tag value."
374   :type 'string
375   :group 'image-dired)
376
377 (defcustom image-dired-cmd-read-exif-data-program
378   "exiftool"
379   "Program used to read EXIF data to image.
380 Used together with `image-dired-cmd-read-exif-data-program-options'."
381   :type 'string
382   :group 'image-dired)
383
384 (defcustom image-dired-cmd-read-exif-data-options
385   "%p -s -s -s -%t \"%f\""
386   "Format of command used to read EXIF data.
387 Available options are %p which is replaced by
388 `image-dired-cmd-write-exif-data-program', %f which is replaced
389 by the image file name and %t which is replaced by the tag name."
390   :type 'string
391   :group 'image-dired)
392
393 (defcustom image-dired-gallery-hidden-tags
394   (list "private" "hidden" "pending")
395   "List of \"hidden\" tags.
396 Used by `image-dired-gallery-generate' to leave out \"hidden\" images."
397   :type '(repeat string)
398   :group 'image-dired)
399
400 (defcustom image-dired-thumb-size (if (eq 'standard image-dired-thumbnail-storage) 128 100)
401   "Size of thumbnails, in pixels.
402 This is the default size for both `image-dired-thumb-width'
403 and `image-dired-thumb-height'."
404   :type 'integer
405   :group 'image-dired)
406
407 (defcustom image-dired-thumb-width image-dired-thumb-size
408   "Width of thumbnails, in pixels."
409   :type 'integer
410   :group 'image-dired)
411
412 (defcustom image-dired-thumb-height image-dired-thumb-size
413   "Height of thumbnails, in pixels."
414   :type 'integer
415   :group 'image-dired)
416
417 (defcustom image-dired-thumb-relief 2
418   "Size of button-like border around thumbnails."
419   :type 'integer
420   :group 'image-dired)
421
422 (defcustom image-dired-thumb-margin 2
423   "Size of the margin around thumbnails.
424 This is where you see the cursor."
425   :type 'integer
426   :group 'image-dired)
427
428 (defcustom image-dired-line-up-method 'dynamic
429   "Default method for line-up of thumbnails in thumbnail buffer.
430 Used by `image-dired-display-thumbs' and other functions that needs
431 to line-up thumbnails.  Dynamic means to use the available width of
432 the window containing the thumbnail buffer, Fixed means to use
433 `image-dired-thumbs-per-row', Interactive is for asking the user,
434 and No line-up means that no automatic line-up will be done."
435   :type '(choice :tag "Default line-up method"
436                  (const :tag "Dynamic" dynamic)
437                  (const :tag "Fixed" fixed)
438                  (const :tag "Interactive" interactive)
439                  (const :tag "No line-up" none))
440   :group 'image-dired)
441
442 (defcustom image-dired-thumbs-per-row 3
443   "Number of thumbnails to display per row in thumb buffer."
444   :type 'integer
445   :group 'image-dired)
446
447 (defcustom image-dired-display-window-width-correction 1
448   "Number to be used to correct image display window width.
449 Change if the default (1) does not work (i.e. if the image does not
450 completely fit)."
451   :type 'integer
452   :group 'image-dired)
453
454 (defcustom image-dired-display-window-height-correction 0
455   "Number to be used to correct image display window height.
456 Change if the default (0) does not work (i.e. if the image does not
457 completely fit)."
458   :type 'integer
459   :group 'image-dired)
460
461 (defcustom image-dired-track-movement t
462   "The current state of the tracking and mirroring.
463 For more information, see the documentation for
464 `image-dired-toggle-movement-tracking'."
465   :type 'boolean
466   :group 'image-dired)
467
468 (defcustom image-dired-append-when-browsing nil
469   "Append thumbnails in thumbnail buffer when browsing.
470 If non-nil, using `image-dired-next-line-and-display' and
471 `image-dired-previous-line-and-display' will leave a trail of thumbnail
472 images in the thumbnail buffer.  If you enable this and want to clean
473 the thumbnail buffer because it is filled with too many thumbnails,
474 just call `image-dired-display-thumb' to display only the image at point.
475 This value can be toggled using `image-dired-toggle-append-browsing'."
476   :type 'boolean
477   :group 'image-dired)
478
479 (defcustom image-dired-dired-disp-props t
480   "If non-nil, display properties for dired file when browsing.
481 Used by `image-dired-next-line-and-display',
482 `image-dired-previous-line-and-display' and `image-dired-mark-and-display-next'.
483 If the database file is large, this can slow down image browsing in
484 dired and you might want to turn it off."
485   :type 'boolean
486   :group 'image-dired)
487
488 (defcustom image-dired-display-properties-format "%b: %f (%t): %c"
489   "Display format for thumbnail properties.
490 %b is replaced with associated dired buffer name, %f with file name
491 \(without path) of original image file, %t with the list of tags and %c
492 with the comment."
493   :type 'string
494   :group 'image-dired)
495
496 (defcustom image-dired-external-viewer
497   ;; TODO: Use mailcap, dired-guess-shell-alist-default,
498   ;; dired-view-command-alist.
499   (cond ((executable-find "display"))
500         ((executable-find "xli"))
501         ((executable-find "qiv") "qiv -t"))
502   "Name of external viewer.
503 Including parameters.  Used when displaying original image from
504 `image-dired-thumbnail-mode'."
505   :type 'string
506   :group 'image-dired)
507
508 (defcustom image-dired-main-image-directory "~/pics/"
509   "Name of main image directory, if any.
510 Used by `image-dired-copy-with-exif-file-name'."
511   :type 'string
512   :group 'image-dired)
513
514 (defcustom image-dired-show-all-from-dir-max-files 50
515   "Maximum number of files to show using `image-dired-show-all-from-dir'
516 before warning the user."
517   :type 'integer
518   :group 'image-dired)
519
520 (defmacro image-dired--with-db-file (&rest body)
521   "Run BODY in a temp buffer containing `image-dired-db-file'.
522 Return the last form in BODY."
523   `(with-temp-buffer
524      (if (file-exists-p image-dired-db-file)
525          (insert-file-contents image-dired-db-file))
526      ,@body))
527
528 (defun image-dired-dir ()
529   "Return the current thumbnails directory (from variable `image-dired-dir').
530 Create the thumbnails directory if it does not exist."
531   (let ((image-dired-dir (file-name-as-directory
532                     (expand-file-name image-dired-dir))))
533     (unless (file-directory-p image-dired-dir)
534       (make-directory image-dired-dir t)
535       (message "Creating thumbnails directory"))
536     image-dired-dir))
537
538 (defun image-dired-insert-image (file type relief margin)
539   "Insert image FILE of image TYPE, using RELIEF and MARGIN, at point."
540
541   (let ((i `(image :type ,type
542                    :file ,file
543                    :relief ,relief
544                    :margin ,margin)))
545     (insert-image i)))
546
547 (defun image-dired-get-thumbnail-image (file)
548   "Return the image descriptor for a thumbnail of image file FILE."
549   (unless (string-match (image-file-name-regexp) file)
550     (error "%s is not a valid image file" file))
551   (let ((thumb-file (image-dired-thumb-name file)))
552     (unless (and (file-exists-p thumb-file)
553                  (<= (float-time (nth 5 (file-attributes file)))
554                      (float-time (nth 5 (file-attributes thumb-file)))))
555       (image-dired-create-thumb file thumb-file))
556     (create-image thumb-file)
557 ;;     (list 'image :type 'jpeg
558 ;;           :file thumb-file
559 ;;        :relief image-dired-thumb-relief :margin image-dired-thumb-margin)
560     ))
561
562 (defun image-dired-insert-thumbnail (file original-file-name
563                                      associated-dired-buffer)
564   "Insert thumbnail image FILE.
565 Add text properties ORIGINAL-FILE-NAME and ASSOCIATED-DIRED-BUFFER."
566   (let (beg end)
567     (setq beg (point))
568     (image-dired-insert-image file
569                         ;; TODO: this should depend on the real file type
570                         (if (eq 'standard image-dired-thumbnail-storage)
571                             'png 'jpeg)
572                         image-dired-thumb-relief
573                         image-dired-thumb-margin)
574     (setq end (point))
575     (add-text-properties
576      beg end
577      (list 'image-dired-thumbnail t
578            'original-file-name original-file-name
579            'associated-dired-buffer associated-dired-buffer
580            'tags (image-dired-list-tags original-file-name)
581            'mouse-face 'highlight
582            'comment (image-dired-get-comment original-file-name)))))
583
584 (defun image-dired-thumb-name (file)
585   "Return thumbnail file name for FILE.
586 Depending on the value of `image-dired-thumbnail-storage', the file
587 name will vary.  For central thumbnail file storage, make a
588 MD5-hash of the image file's directory name and add that to make
589 the thumbnail file name unique.  For per-directory storage, just
590 add a subdirectory.  For standard storage, produce the file name
591 according to the Thumbnail Managing Standard."
592   (cond ((eq 'standard image-dired-thumbnail-storage)
593          (expand-file-name
594           (concat "~/.thumbnails/normal/"
595                   (md5 (concat "file://" (expand-file-name file))) ".png")))
596         ((eq 'use-image-dired-dir image-dired-thumbnail-storage)
597          (let* ((f (expand-file-name file))
598                 (md5-hash
599                  ;; Is MD5 hashes fast enough? The checksum of a
600                  ;; thumbnail file name need not be that
601                  ;; "cryptographically" good so a faster one could
602                  ;; be used here.
603                  (md5 (file-name-as-directory (file-name-directory f)))))
604            (format "%s%s%s.thumb.%s"
605                    (file-name-as-directory (expand-file-name (image-dired-dir)))
606                    (file-name-base f)
607                    (if md5-hash (concat "_" md5-hash) "")
608                    (file-name-extension f))))
609         ((eq 'per-directory image-dired-thumbnail-storage)
610          (let ((f (expand-file-name file)))
611            (format "%s.image-dired/%s.thumb.%s"
612                    (file-name-directory f)
613                    (file-name-base f)
614                    (file-name-extension f))))))
615
616 (defun image-dired-create-thumb (original-file thumbnail-file)
617   "For ORIGINAL-FILE, create thumbnail image named THUMBNAIL-FILE."
618   (let* ((width (int-to-string image-dired-thumb-width))
619          (height (int-to-string image-dired-thumb-height))
620          (modif-time (format "%.0f" (float-time (nth 5 (file-attributes
621                                                         original-file)))))
622          (thumbnail-nq8-file (replace-regexp-in-string ".png\\'" "-nq8.png"
623                                                        thumbnail-file))
624          (command
625           (format-spec
626            (if (eq 'standard image-dired-thumbnail-storage)
627                image-dired-cmd-create-standard-thumbnail-command
628              image-dired-cmd-create-thumbnail-options)
629            (list
630             (cons ?p image-dired-cmd-create-thumbnail-program)
631             (cons ?w width)
632             (cons ?h height)
633             (cons ?m modif-time)
634             (cons ?f original-file)
635             (cons ?q thumbnail-nq8-file)
636             (cons ?t thumbnail-file))))
637          thumbnail-dir)
638     (when (not (file-exists-p
639                 (setq thumbnail-dir (file-name-directory thumbnail-file))))
640       (message "Creating thumbnail directory.")
641       (make-directory thumbnail-dir))
642     (call-process shell-file-name nil nil nil shell-command-switch command)))
643
644 ;;;###autoload
645 (defun image-dired-dired-toggle-marked-thumbs (&optional arg)
646   "Toggle thumbnails in front of file names in the dired buffer.
647 If no marked file could be found, insert or hide thumbnails on the
648 current line.  ARG, if non-nil, specifies the files to use instead
649 of the marked files.  If ARG is an integer, use the next ARG (or
650 previous -ARG, if ARG<0) files."
651   (interactive "P")
652   (dired-map-over-marks
653    (let* ((image-pos  (dired-move-to-filename))
654           (image-file (dired-get-filename nil t))
655           thumb-file
656           overlay)
657      (when (and image-file
658                 (string-match-p (image-file-name-regexp) image-file))
659        (setq thumb-file (image-dired-get-thumbnail-image image-file))
660        ;; If image is not already added, then add it.
661        (let* ((cur-ovs (overlays-in (point) (1+ (point))))
662               (thumb-ov (car (cl-remove-if-not
663                               (lambda (ov) (overlay-get ov 'thumb-file))
664                               cur-ovs))))
665          (if thumb-ov
666              (delete-overlay thumb-ov)
667            (put-image thumb-file image-pos)
668            (setq overlay
669                  (cl-loop for o in (overlays-in (point) (1+ (point)))
670                           when (overlay-get o 'put-image) collect o into ov
671                           finally return (car ov)))
672            (overlay-put overlay 'image-file image-file)
673            (overlay-put overlay 'thumb-file thumb-file)))))
674    arg             ; Show or hide image on ARG next files.
675    'show-progress) ; Update dired display after each image is updated.
676   (add-hook 'dired-after-readin-hook
677             'image-dired-dired-after-readin-hook nil t))
678
679 (defun image-dired-dired-after-readin-hook ()
680   "Relocate existing thumbnail overlays in dired buffer after reverting.
681 Move them to their corresponding files if they still exist.
682 Otherwise, delete overlays."
683   (mapc (lambda (overlay)
684           (when (overlay-get overlay 'put-image)
685             (let* ((image-file (overlay-get overlay 'image-file))
686                    (image-pos (dired-goto-file image-file)))
687               (if image-pos
688                   (move-overlay overlay image-pos image-pos)
689                 (delete-overlay overlay)))))
690         (overlays-in (point-min) (point-max))))
691
692 (defun image-dired-next-line-and-display ()
693   "Move to next dired line and display thumbnail image."
694   (interactive)
695   (dired-next-line 1)
696   (image-dired-display-thumbs
697    t (or image-dired-append-when-browsing nil) t)
698   (if image-dired-dired-disp-props
699       (image-dired-dired-display-properties)))
700
701 (defun image-dired-previous-line-and-display ()
702   "Move to previous dired line and display thumbnail image."
703   (interactive)
704   (dired-previous-line 1)
705   (image-dired-display-thumbs
706    t (or image-dired-append-when-browsing nil) t)
707   (if image-dired-dired-disp-props
708       (image-dired-dired-display-properties)))
709
710 (defun image-dired-toggle-append-browsing ()
711   "Toggle `image-dired-append-when-browsing'."
712   (interactive)
713   (setq image-dired-append-when-browsing
714         (not image-dired-append-when-browsing))
715   (message "Append browsing %s."
716            (if image-dired-append-when-browsing
717                "on"
718              "off")))
719
720 (defun image-dired-mark-and-display-next ()
721   "Mark current file in dired and display next thumbnail image."
722   (interactive)
723   (dired-mark 1)
724   (image-dired-display-thumbs
725    t (or image-dired-append-when-browsing nil) t)
726   (if image-dired-dired-disp-props
727       (image-dired-dired-display-properties)))
728
729 (defun image-dired-toggle-dired-display-properties ()
730   "Toggle `image-dired-dired-disp-props'."
731   (interactive)
732   (setq image-dired-dired-disp-props
733         (not image-dired-dired-disp-props))
734   (message "Dired display properties %s."
735            (if image-dired-dired-disp-props
736                "on"
737              "off")))
738
739 (defvar image-dired-thumbnail-buffer "*image-dired*"
740   "Image-Dired's thumbnail buffer.")
741
742 (defun image-dired-create-thumbnail-buffer ()
743   "Create thumb buffer and set `image-dired-thumbnail-mode'."
744   (let ((buf (get-buffer-create image-dired-thumbnail-buffer)))
745     (with-current-buffer buf
746       (setq buffer-read-only t)
747       (if (not (eq major-mode 'image-dired-thumbnail-mode))
748           (image-dired-thumbnail-mode)))
749     buf))
750
751 (defvar image-dired-display-image-buffer "*image-dired-display-image*"
752   "Where larger versions of the images are display.")
753
754 (defun image-dired-create-display-image-buffer ()
755   "Create image display buffer and set `image-dired-display-image-mode'."
756   (let ((buf (get-buffer-create image-dired-display-image-buffer)))
757     (with-current-buffer buf
758       (setq buffer-read-only t)
759       (if (not (eq major-mode 'image-dired-display-image-mode))
760           (image-dired-display-image-mode)))
761     buf))
762
763 (defvar image-dired-saved-window-configuration nil
764   "Saved window configuration.")
765
766 ;;;###autoload
767 (defun image-dired-dired-with-window-configuration (dir &optional arg)
768   "Open directory DIR and create a default window configuration.
769
770 Convenience command that:
771
772  - Opens dired in folder DIR
773  - Splits windows in most useful (?) way
774  - Set `truncate-lines' to t
775
776 After the command has finished, you would typically mark some
777 image files in dired and type
778 \\[image-dired-display-thumbs] (`image-dired-display-thumbs').
779
780 If called with prefix argument ARG, skip splitting of windows.
781
782 The current window configuration is saved and can be restored by
783 calling `image-dired-restore-window-configuration'."
784   (interactive "DDirectory: \nP")
785   (let ((buf (image-dired-create-thumbnail-buffer))
786         (buf2 (image-dired-create-display-image-buffer)))
787     (setq image-dired-saved-window-configuration
788           (current-window-configuration))
789     (dired dir)
790     (delete-other-windows)
791     (when (not arg)
792       (split-window-right)
793       (setq truncate-lines t)
794       (save-excursion
795         (other-window 1)
796         (switch-to-buffer buf)
797         (select-window (split-window-below))
798         (switch-to-buffer buf2)
799         (other-window -2)))))
800
801 (defun image-dired-restore-window-configuration ()
802   "Restore window configuration.
803 Restore any changes to the window configuration made by calling
804 `image-dired-dired-with-window-configuration'."
805   (interactive)
806   (if image-dired-saved-window-configuration
807       (set-window-configuration image-dired-saved-window-configuration)
808     (message "No saved window configuration")))
809
810 ;;;###autoload
811 (defun image-dired-display-thumbs (&optional arg append do-not-pop)
812   "Display thumbnails of all marked files, in `image-dired-thumbnail-buffer'.
813 If a thumbnail image does not exist for a file, it is created on the
814 fly.  With prefix argument ARG, display only thumbnail for file at
815 point (this is useful if you have marked some files but want to show
816 another one).
817
818 Recommended usage is to split the current frame horizontally so that
819 you have the dired buffer in the left window and the
820 `image-dired-thumbnail-buffer' buffer in the right window.
821
822 With optional argument APPEND, append thumbnail to thumbnail buffer
823 instead of erasing it first.
824
825 Optional argument DO-NOT-POP controls if `pop-to-buffer' should be
826 used or not.  If non-nil, use `display-buffer' instead of
827 `pop-to-buffer'.  This is used from functions like
828 `image-dired-next-line-and-display' and
829 `image-dired-previous-line-and-display' where we do not want the
830 thumbnail buffer to be selected."
831   (interactive "P")
832   (let ((buf (image-dired-create-thumbnail-buffer))
833         thumb-name files dired-buf)
834     (if arg
835         (setq files (list (dired-get-filename)))
836       (setq files (dired-get-marked-files)))
837     (setq dired-buf (current-buffer))
838     (with-current-buffer buf
839       (let ((inhibit-read-only t))
840         (if (not append)
841             (erase-buffer)
842           (goto-char (point-max)))
843         (mapc
844          (lambda (curr-file)
845            (setq thumb-name (image-dired-thumb-name curr-file))
846            (if (and (not (file-exists-p thumb-name))
847                     (not (= 0 (image-dired-create-thumb curr-file thumb-name))))
848                (message "Thumb could not be created for file %s" curr-file)
849              (image-dired-insert-thumbnail thumb-name curr-file dired-buf)))
850          files))
851       (cond ((eq 'dynamic image-dired-line-up-method)
852              (image-dired-line-up-dynamic))
853             ((eq 'fixed image-dired-line-up-method)
854              (image-dired-line-up))
855             ((eq 'interactive image-dired-line-up-method)
856              (image-dired-line-up-interactive))
857             ((eq 'none image-dired-line-up-method)
858              nil)
859             (t
860              (image-dired-line-up-dynamic))))
861     (if do-not-pop
862         (display-buffer image-dired-thumbnail-buffer)
863       (pop-to-buffer image-dired-thumbnail-buffer))))
864
865 ;;;###autoload
866 (defun image-dired-show-all-from-dir (dir)
867   "Make a preview buffer for all images in DIR and display it.
868 If the number of files in DIR matching `image-file-name-regexp'
869 exceeds `image-dired-show-all-from-dir-max-files', a warning will be
870 displayed."
871   (interactive "DDir: ")
872   (dired dir)
873   (dired-mark-files-regexp (image-file-name-regexp))
874   (let ((files (dired-get-marked-files)))
875     (if (or (<= (length files) image-dired-show-all-from-dir-max-files)
876             (and (> (length files) image-dired-show-all-from-dir-max-files)
877                  (y-or-n-p
878                   (format
879                    "Directory contains more than %d image files.  Proceed? "
880                    image-dired-show-all-from-dir-max-files))))
881         (progn
882           (image-dired-display-thumbs)
883           (pop-to-buffer image-dired-thumbnail-buffer))
884       (message "Canceled."))))
885
886 ;;;###autoload
887 (defalias 'image-dired 'image-dired-show-all-from-dir)
888
889 ;;;###autoload
890 (define-obsolete-function-alias 'tumme 'image-dired "24.4")
891
892 (defun image-dired-sane-db-file ()
893   "Check if `image-dired-db-file' exists.
894 If not, try to create it (including any parent directories).
895 Signal error if there are problems creating it."
896   (or (file-exists-p image-dired-db-file)
897       (let (dir buf)
898         (unless (file-directory-p (setq dir (file-name-directory
899                                              image-dired-db-file)))
900           (make-directory dir t))
901         (with-current-buffer (setq buf (create-file-buffer
902                                         image-dired-db-file))
903           (write-file image-dired-db-file))
904         (kill-buffer buf)
905         (file-exists-p image-dired-db-file))
906       (error "Could not create %s" image-dired-db-file)))
907
908 (defun image-dired-write-tags (file-tags)
909   "Write file tags to database.
910 Write each file and tag in FILE-TAGS to the database.
911 FILE-TAGS is an alist in the following form:
912  ((FILE . TAG) ... )"
913   (image-dired-sane-db-file)
914   (let (end file tag)
915     (image-dired--with-db-file
916      (setq buffer-file-name image-dired-db-file)
917      (dolist (elt file-tags)
918        (setq file (car elt)
919              tag (cdr elt))
920        (goto-char (point-min))
921        (if (search-forward-regexp (format "^%s.*$" file) nil t)
922            (progn
923              (setq end (point))
924              (beginning-of-line)
925              (when (not (search-forward (format ";%s" tag) end t))
926                (end-of-line)
927                (insert (format ";%s" tag))))
928          (goto-char (point-max))
929          (insert (format "\n%s;%s" file tag))))
930      (save-buffer))))
931
932 (defun image-dired-remove-tag (files tag)
933   "For all FILES, remove TAG from the image database."
934   (image-dired-sane-db-file)
935   (image-dired--with-db-file
936    (setq buffer-file-name image-dired-db-file)
937    (let (end)
938      (unless (listp files)
939        (if (stringp files)
940            (setq files (list files))
941          (error "Files must be a string or a list of strings!")))
942      (dolist (file files)
943        (goto-char (point-min))
944        (when (search-forward-regexp (format "^%s" file) nil t)
945          (end-of-line)
946          (setq end (point))
947          (beginning-of-line)
948          (when (search-forward-regexp (format "\\(;%s\\)" tag) end t)
949            (delete-region (match-beginning 1) (match-end 1))
950            ;; Check if file should still be in the database. If
951            ;; it has no tags or comments, it will be removed.
952            (end-of-line)
953            (setq end (point))
954            (beginning-of-line)
955            (when (not (search-forward ";" end t))
956              (kill-line 1)
957              ;; If on empty line at end of buffer
958              (and (eobp)
959                   (looking-at "^$")
960                   (delete-char -1)))))))
961    (save-buffer)))
962
963 (defun image-dired-list-tags (file)
964   "Read all tags for image FILE from the image database."
965   (image-dired-sane-db-file)
966   (image-dired--with-db-file
967    (let (end (tags ""))
968      (when (search-forward-regexp (format "^%s" file) nil t)
969        (end-of-line)
970        (setq end (point))
971        (beginning-of-line)
972        (if (search-forward ";" end t)
973            (if (search-forward "comment:" end t)
974                (if (search-forward ";" end t)
975                    (setq tags (buffer-substring (point) end)))
976              (setq tags (buffer-substring (point) end)))))
977      (split-string tags ";"))))
978
979 ;;;###autoload
980 (defun image-dired-tag-files (arg)
981   "Tag marked file(s) in dired.  With prefix ARG, tag file at point."
982   (interactive "P")
983   (let ((tag (read-string "Tags to add (separate tags with a semicolon): "))
984         files)
985     (if arg
986         (setq files (list (dired-get-filename)))
987       (setq files (dired-get-marked-files)))
988     (image-dired-write-tags
989      (mapcar
990       (lambda (x)
991         (cons x tag))
992       files))))
993
994 (defun image-dired-tag-thumbnail ()
995   "Tag current thumbnail."
996   (interactive)
997   (let ((tag (read-string "Tags to add (separate tags with a semicolon): ")))
998     (image-dired-write-tags (list (cons (image-dired-original-file-name) tag))))
999   (image-dired-update-property
1000    'tags (image-dired-list-tags (image-dired-original-file-name))))
1001
1002 ;;;###autoload
1003 (defun image-dired-delete-tag (arg)
1004   "Remove tag for selected file(s).
1005 With prefix argument ARG, remove tag from file at point."
1006   (interactive "P")
1007   (let ((tag (read-string "Tag to remove: "))
1008         files)
1009     (if arg
1010         (setq files (list (dired-get-filename)))
1011       (setq files (dired-get-marked-files)))
1012     (image-dired-remove-tag files tag)))
1013
1014 (defun image-dired-tag-thumbnail-remove ()
1015   "Remove tag from thumbnail."
1016   (interactive)
1017   (let ((tag (read-string "Tag to remove: ")))
1018     (image-dired-remove-tag (image-dired-original-file-name) tag))
1019   (image-dired-update-property
1020    'tags (image-dired-list-tags (image-dired-original-file-name))))
1021
1022 (defun image-dired-original-file-name ()
1023   "Get original file name for thumbnail or display image at point."
1024   (get-text-property (point) 'original-file-name))
1025
1026 (defun image-dired-associated-dired-buffer ()
1027   "Get associated dired buffer at point."
1028   (get-text-property (point) 'associated-dired-buffer))
1029
1030 (defun image-dired-get-buffer-window (buf)
1031   "Return window where buffer BUF is."
1032   (get-window-with-predicate
1033    (lambda (window)
1034      (equal (window-buffer window) buf))
1035    nil t))
1036
1037 (defun image-dired-track-original-file ()
1038   "Track the original file in the associated dired buffer.
1039 See documentation for `image-dired-toggle-movement-tracking'.
1040 Interactive use only useful if `image-dired-track-movement' is nil."
1041   (interactive)
1042   (let* ((dired-buf (image-dired-associated-dired-buffer))
1043          (file-name (image-dired-original-file-name))
1044          (window (image-dired-get-buffer-window dired-buf)))
1045     (and (buffer-live-p dired-buf) file-name
1046          (with-current-buffer dired-buf
1047            (if (not (dired-goto-file file-name))
1048                (message "Could not track file")
1049              (if window (set-window-point window (point))))))))
1050
1051 (defun image-dired-toggle-movement-tracking ()
1052   "Turn on and off `image-dired-track-movement'.
1053 Tracking of the movements between thumbnail and dired buffer so that
1054 they are \"mirrored\" in the dired buffer.  When this is on, moving
1055 around in the thumbnail or dired buffer will find the matching
1056 position in the other buffer."
1057   (interactive)
1058   (setq image-dired-track-movement (not image-dired-track-movement))
1059   (message "Tracking %s" (if image-dired-track-movement "on" "off")))
1060
1061 (defun image-dired-track-thumbnail ()
1062   "Track current dired file's thumb in `image-dired-thumbnail-buffer'.
1063 This is almost the same as what `image-dired-track-original-file' does,
1064 but the other way around."
1065   (let ((file (dired-get-filename))
1066         prop-val found window)
1067     (when (get-buffer image-dired-thumbnail-buffer)
1068       (with-current-buffer image-dired-thumbnail-buffer
1069         (goto-char (point-min))
1070         (while (and (not (eobp))
1071                     (not found))
1072           (if (and (setq prop-val
1073                          (get-text-property (point) 'original-file-name))
1074                    (string= prop-val file))
1075               (setq found t))
1076           (if (not found)
1077               (forward-char 1)))
1078         (when found
1079           (if (setq window (image-dired-thumbnail-window))
1080               (set-window-point window (point)))
1081           (image-dired-display-thumb-properties))))))
1082
1083 (defun image-dired-dired-next-line (&optional arg)
1084   "Call `dired-next-line', then track thumbnail.
1085 This can safely replace `dired-next-line'.
1086 With prefix argument, move ARG lines."
1087   (interactive "P")
1088   (dired-next-line (or arg 1))
1089   (if image-dired-track-movement
1090       (image-dired-track-thumbnail)))
1091
1092 (defun image-dired-dired-previous-line (&optional arg)
1093   "Call `dired-previous-line', then track thumbnail.
1094 This can safely replace `dired-previous-line'.
1095 With prefix argument, move ARG lines."
1096   (interactive "P")
1097   (dired-previous-line (or arg 1))
1098   (if image-dired-track-movement
1099       (image-dired-track-thumbnail)))
1100
1101 (defun image-dired-forward-image (&optional arg)
1102   "Move to next image and display properties.
1103 Optional prefix ARG says how many images to move; default is one
1104 image."
1105   (interactive "p")
1106   (let (pos (steps (or arg 1)))
1107     (dotimes (i steps)
1108       (if (and (not (eobp))
1109                (save-excursion
1110                  (forward-char)
1111                  (while (and (not (eobp))
1112                              (not (image-dired-image-at-point-p)))
1113                    (forward-char))
1114                  (setq pos (point))
1115                  (image-dired-image-at-point-p)))
1116           (goto-char pos)
1117         (error "At last image"))))
1118   (when image-dired-track-movement
1119     (image-dired-track-original-file))
1120   (image-dired-display-thumb-properties))
1121
1122 (defun image-dired-backward-image (&optional arg)
1123   "Move to previous image and display properties.
1124 Optional prefix ARG says how many images to move; default is one
1125 image."
1126   (interactive "p")
1127   (let (pos (steps (or arg 1)))
1128     (dotimes (i steps)
1129       (if (and (not (bobp))
1130                (save-excursion
1131                  (backward-char)
1132                  (while (and (not (bobp))
1133                              (not (image-dired-image-at-point-p)))
1134                    (backward-char))
1135                  (setq pos (point))
1136                  (image-dired-image-at-point-p)))
1137           (goto-char pos)
1138         (error "At first image"))))
1139   (when image-dired-track-movement
1140     (image-dired-track-original-file))
1141   (image-dired-display-thumb-properties))
1142
1143 (defun image-dired-next-line ()
1144   "Move to next line and display properties."
1145   (interactive)
1146   (forward-line 1)
1147   ;; If we end up in an empty spot, back up to the next thumbnail.
1148   (if (not (image-dired-image-at-point-p))
1149       (image-dired-backward-image))
1150   (if image-dired-track-movement
1151       (image-dired-track-original-file))
1152   (image-dired-display-thumb-properties))
1153
1154
1155 (defun image-dired-previous-line ()
1156   "Move to previous line and display properties."
1157   (interactive)
1158   (forward-line -1)
1159   ;; If we end up in an empty spot, back up to the next
1160   ;; thumbnail. This should only happen if the user deleted a
1161   ;; thumbnail and did not refresh, so it is not very common. But we
1162   ;; can handle it in a good manner, so why not?
1163   (if (not (image-dired-image-at-point-p))
1164       (image-dired-backward-image))
1165   (if image-dired-track-movement
1166       (image-dired-track-original-file))
1167   (image-dired-display-thumb-properties))
1168
1169 (defun image-dired-format-properties-string (buf file props comment)
1170   "Format display properties.
1171 BUF is the associated dired buffer, FILE is the original image file
1172 name, PROPS is a list of tags and COMMENT is the image file's
1173 comment."
1174   (format-spec
1175    image-dired-display-properties-format
1176    (list
1177     (cons ?b (or buf ""))
1178     (cons ?f file)
1179     (cons ?t (or (princ props) ""))
1180     (cons ?c (or comment "")))))
1181
1182 (defun image-dired-display-thumb-properties ()
1183   "Display thumbnail properties in the echo area."
1184   (if (not (eobp))
1185       (let ((file-name (file-name-nondirectory (image-dired-original-file-name)))
1186             (dired-buf (buffer-name (image-dired-associated-dired-buffer)))
1187             (props (mapconcat
1188                     'princ
1189                     (get-text-property (point) 'tags)
1190                     ", "))
1191             (comment (get-text-property (point) 'comment)))
1192         (if file-name
1193              (message "%s"
1194              (image-dired-format-properties-string
1195               dired-buf
1196               file-name
1197               props
1198               comment))))))
1199
1200 (defun image-dired-dired-file-marked-p ()
1201   "Check whether file on current line is marked or not."
1202   (save-excursion
1203     (beginning-of-line)
1204     (not (looking-at "^ .*$"))))
1205
1206 (defun image-dired-modify-mark-on-thumb-original-file (command)
1207   "Modify mark in dired buffer.
1208 COMMAND is one of 'mark for marking file in dired, 'unmark for
1209 unmarking file in dired or 'flag for flagging file for delete in
1210 dired."
1211   (let ((file-name (image-dired-original-file-name))
1212         (dired-buf (image-dired-associated-dired-buffer)))
1213     (if (not (and dired-buf file-name))
1214         (message "No image, or image with correct properties, at point.")
1215     (with-current-buffer dired-buf
1216         (message "%s" file-name)
1217         (if (dired-goto-file file-name)
1218             (cond ((eq command 'mark) (dired-mark 1))
1219                   ((eq command 'unmark) (dired-unmark 1))
1220                   ((eq command 'toggle)
1221                    (if (image-dired-dired-file-marked-p)
1222                        (dired-unmark 1)
1223                      (dired-mark 1)))
1224                   ((eq command 'flag) (dired-flag-file-deletion 1))))))))
1225
1226 (defun image-dired-mark-thumb-original-file ()
1227   "Mark original image file in associated dired buffer."
1228   (interactive)
1229   (image-dired-modify-mark-on-thumb-original-file 'mark)
1230   (image-dired-forward-image))
1231
1232 (defun image-dired-unmark-thumb-original-file ()
1233   "Unmark original image file in associated dired buffer."
1234   (interactive)
1235   (image-dired-modify-mark-on-thumb-original-file 'unmark)
1236   (image-dired-forward-image))
1237
1238 (defun image-dired-flag-thumb-original-file ()
1239   "Flag original image file for deletion in associated dired buffer."
1240   (interactive)
1241   (image-dired-modify-mark-on-thumb-original-file 'flag)
1242   (image-dired-forward-image))
1243
1244 (defun image-dired-toggle-mark-thumb-original-file ()
1245   "Toggle mark on original image file in associated dired buffer."
1246   (interactive)
1247   (image-dired-modify-mark-on-thumb-original-file 'toggle))
1248
1249 (defun image-dired-jump-original-dired-buffer ()
1250   "Jump to the dired buffer associated with the current image file.
1251 You probably want to use this together with
1252 `image-dired-track-original-file'."
1253   (interactive)
1254   (let ((buf (image-dired-associated-dired-buffer))
1255         window frame)
1256     (setq window (image-dired-get-buffer-window buf))
1257     (if window
1258         (progn
1259           (if (not (equal (selected-frame) (setq frame (window-frame window))))
1260               (select-frame-set-input-focus frame))
1261           (select-window window))
1262       (message "Associated dired buffer not visible"))))
1263
1264 ;;;###autoload
1265 (defun image-dired-jump-thumbnail-buffer ()
1266   "Jump to thumbnail buffer."
1267   (interactive)
1268   (let ((window (image-dired-thumbnail-window))
1269         frame)
1270     (if window
1271         (progn
1272           (if (not (equal (selected-frame) (setq frame (window-frame window))))
1273               (select-frame-set-input-focus frame))
1274           (select-window window))
1275       (message "Thumbnail buffer not visible"))))
1276
1277 (defvar image-dired-thumbnail-mode-map (make-sparse-keymap)
1278   "Keymap for `image-dired-thumbnail-mode'.")
1279
1280 (defvar image-dired-thumbnail-mode-line-up-map (make-sparse-keymap)
1281   "Keymap for line-up commands in `image-dired-thumbnail-mode'.")
1282
1283 (defvar image-dired-thumbnail-mode-tag-map (make-sparse-keymap)
1284   "Keymap for tag commands in `image-dired-thumbnail-mode'.")
1285
1286 (defun image-dired-define-thumbnail-mode-keymap ()
1287   "Define keymap for `image-dired-thumbnail-mode'."
1288
1289   ;; Keys
1290   (define-key image-dired-thumbnail-mode-map [right] 'image-dired-forward-image)
1291   (define-key image-dired-thumbnail-mode-map [left] 'image-dired-backward-image)
1292   (define-key image-dired-thumbnail-mode-map [up] 'image-dired-previous-line)
1293   (define-key image-dired-thumbnail-mode-map [down] 'image-dired-next-line)
1294   (define-key image-dired-thumbnail-mode-map "\C-f" 'image-dired-forward-image)
1295   (define-key image-dired-thumbnail-mode-map "\C-b" 'image-dired-backward-image)
1296   (define-key image-dired-thumbnail-mode-map "\C-p" 'image-dired-previous-line)
1297   (define-key image-dired-thumbnail-mode-map "\C-n" 'image-dired-next-line)
1298
1299   (define-key image-dired-thumbnail-mode-map "d" 'image-dired-flag-thumb-original-file)
1300   (define-key image-dired-thumbnail-mode-map [delete]
1301     'image-dired-flag-thumb-original-file)
1302   (define-key image-dired-thumbnail-mode-map "m" 'image-dired-mark-thumb-original-file)
1303   (define-key image-dired-thumbnail-mode-map "u" 'image-dired-unmark-thumb-original-file)
1304   (define-key image-dired-thumbnail-mode-map "." 'image-dired-track-original-file)
1305   (define-key image-dired-thumbnail-mode-map [tab] 'image-dired-jump-original-dired-buffer)
1306
1307   ;; add line-up map
1308   (define-key image-dired-thumbnail-mode-map "g" image-dired-thumbnail-mode-line-up-map)
1309
1310   ;; map it to "g" so that the user can press it more quickly
1311   (define-key image-dired-thumbnail-mode-line-up-map "g" 'image-dired-line-up-dynamic)
1312   ;; "f" for "fixed" number of thumbs per row
1313   (define-key image-dired-thumbnail-mode-line-up-map "f" 'image-dired-line-up)
1314   ;; "i" for "interactive"
1315   (define-key image-dired-thumbnail-mode-line-up-map "i" 'image-dired-line-up-interactive)
1316
1317   ;; add tag map
1318   (define-key image-dired-thumbnail-mode-map "t" image-dired-thumbnail-mode-tag-map)
1319
1320   ;; map it to "t" so that the user can press it more quickly
1321   (define-key image-dired-thumbnail-mode-tag-map "t" 'image-dired-tag-thumbnail)
1322   ;; "r" for "remove"
1323   (define-key image-dired-thumbnail-mode-tag-map "r" 'image-dired-tag-thumbnail-remove)
1324
1325   (define-key image-dired-thumbnail-mode-map "\C-m"
1326     'image-dired-display-thumbnail-original-image)
1327   (define-key image-dired-thumbnail-mode-map [C-return]
1328     'image-dired-thumbnail-display-external)
1329
1330   (define-key image-dired-thumbnail-mode-map "l" 'image-dired-rotate-thumbnail-left)
1331   (define-key image-dired-thumbnail-mode-map "r" 'image-dired-rotate-thumbnail-right)
1332
1333   (define-key image-dired-thumbnail-mode-map "L" 'image-dired-rotate-original-left)
1334   (define-key image-dired-thumbnail-mode-map "R" 'image-dired-rotate-original-right)
1335
1336   (define-key image-dired-thumbnail-mode-map "D"
1337     'image-dired-thumbnail-set-image-description)
1338
1339   (define-key image-dired-thumbnail-mode-map "\C-d" 'image-dired-delete-char)
1340   (define-key image-dired-thumbnail-mode-map " "
1341     'image-dired-display-next-thumbnail-original)
1342   (define-key image-dired-thumbnail-mode-map
1343     (kbd "DEL") 'image-dired-display-previous-thumbnail-original)
1344   (define-key image-dired-thumbnail-mode-map "c" 'image-dired-comment-thumbnail)
1345   (define-key image-dired-thumbnail-mode-map "q" 'image-dired-kill-buffer-and-window)
1346
1347   ;; Mouse
1348   (define-key image-dired-thumbnail-mode-map [mouse-2] 'image-dired-mouse-display-image)
1349   (define-key image-dired-thumbnail-mode-map [mouse-1] 'image-dired-mouse-select-thumbnail)
1350
1351   ;; Seems I must first set C-down-mouse-1 to undefined, or else it
1352   ;; will trigger the buffer menu. If I try to instead bind
1353   ;; C-down-mouse-1 to `image-dired-mouse-toggle-mark', I get a message
1354   ;; about C-mouse-1 not being defined afterwards. Annoying, but I
1355   ;; probably do not completely understand mouse events.
1356
1357   (define-key image-dired-thumbnail-mode-map [C-down-mouse-1] 'undefined)
1358   (define-key image-dired-thumbnail-mode-map [C-mouse-1] 'image-dired-mouse-toggle-mark)
1359
1360   ;; Menu
1361   (define-key image-dired-thumbnail-mode-map [menu-bar image-dired]
1362     (cons "Image-Dired" (make-sparse-keymap "Image-Dired")))
1363
1364   (define-key image-dired-thumbnail-mode-map
1365     [menu-bar image-dired image-dired-kill-buffer-and-window]
1366     '("Quit" . image-dired-kill-buffer-and-window))
1367
1368   (define-key image-dired-thumbnail-mode-map
1369     [menu-bar image-dired image-dired-delete-char]
1370     '("Delete thumbnail from buffer" . image-dired-delete-char))
1371
1372   (define-key image-dired-thumbnail-mode-map
1373     [menu-bar image-dired image-dired-tag-thumbnail-remove]
1374     '("Remove tag from thumbnail" . image-dired-tag-thumbnail-remove))
1375
1376   (define-key image-dired-thumbnail-mode-map
1377     [menu-bar image-dired image-dired-tag-thumbnail]
1378     '("Tag thumbnail" . image-dired-tag-thumbnail))
1379
1380   (define-key image-dired-thumbnail-mode-map
1381     [menu-bar image-dired image-dired-comment-thumbnail]
1382     '("Comment thumbnail" . image-dired-comment-thumbnail))
1383
1384   (define-key image-dired-thumbnail-mode-map
1385     [menu-bar image-dired image-dired-refresh-thumb]
1386     '("Refresh thumb" . image-dired-refresh-thumb))
1387   (define-key image-dired-thumbnail-mode-map
1388     [menu-bar image-dired image-dired-line-up-dynamic]
1389     '("Dynamic line up" . image-dired-line-up-dynamic))
1390   (define-key image-dired-thumbnail-mode-map
1391     [menu-bar image-dired image-dired-line-up]
1392     '("Line up thumbnails" . image-dired-line-up))
1393
1394   (define-key image-dired-thumbnail-mode-map
1395     [menu-bar image-dired image-dired-rotate-thumbnail-left]
1396     '("Rotate thumbnail left" . image-dired-rotate-thumbnail-left))
1397   (define-key image-dired-thumbnail-mode-map
1398     [menu-bar image-dired image-dired-rotate-thumbnail-right]
1399     '("Rotate thumbnail right" . image-dired-rotate-thumbnail-right))
1400
1401   (define-key image-dired-thumbnail-mode-map
1402     [menu-bar image-dired image-dired-rotate-original-left]
1403     '("Rotate original left" . image-dired-rotate-original-left))
1404   (define-key image-dired-thumbnail-mode-map
1405     [menu-bar image-dired image-dired-rotate-original-right]
1406     '("Rotate original right" . image-dired-rotate-original-right))
1407
1408   (define-key image-dired-thumbnail-mode-map
1409     [menu-bar image-dired image-dired-toggle-movement-tracking]
1410     '("Toggle movement tracking on/off" . image-dired-toggle-movement-tracking))
1411
1412   (define-key image-dired-thumbnail-mode-map
1413     [menu-bar image-dired image-dired-jump-original-dired-buffer]
1414     '("Jump to dired buffer" . image-dired-jump-original-dired-buffer))
1415   (define-key image-dired-thumbnail-mode-map
1416     [menu-bar image-dired image-dired-track-original-file]
1417     '("Track original" . image-dired-track-original-file))
1418
1419   (define-key image-dired-thumbnail-mode-map
1420     [menu-bar image-dired image-dired-flag-thumb-original-file]
1421     '("Flag original for deletion" . image-dired-flag-thumb-original-file))
1422   (define-key image-dired-thumbnail-mode-map
1423     [menu-bar image-dired image-dired-unmark-thumb-original-file]
1424     '("Unmark original" . image-dired-unmark-thumb-original-file))
1425   (define-key image-dired-thumbnail-mode-map
1426     [menu-bar image-dired image-dired-mark-thumb-original-file]
1427     '("Mark original" . image-dired-mark-thumb-original-file))
1428
1429   (define-key image-dired-thumbnail-mode-map
1430     [menu-bar image-dired image-dired-thumbnail-display-external]
1431     '("Display in external viewer" . image-dired-thumbnail-display-external))
1432   (define-key image-dired-thumbnail-mode-map
1433     [menu-bar image-dired image-dired-display-thumbnail-original-image]
1434     '("Display image" . image-dired-display-thumbnail-original-image)))
1435
1436 (defvar image-dired-display-image-mode-map (make-sparse-keymap)
1437   "Keymap for `image-dired-display-image-mode'.")
1438
1439 (defun image-dired-define-display-image-mode-keymap ()
1440   "Define keymap for `image-dired-display-image-mode'."
1441
1442   ;; Keys
1443   (define-key image-dired-display-image-mode-map "q" 'image-dired-kill-buffer-and-window)
1444
1445   (define-key image-dired-display-image-mode-map "f"
1446     'image-dired-display-current-image-full)
1447
1448   (define-key image-dired-display-image-mode-map "s"
1449     'image-dired-display-current-image-sized)
1450
1451   ;; Menu
1452   (define-key image-dired-display-image-mode-map [menu-bar image-dired]
1453     (cons "Image-Dired" (make-sparse-keymap "Image-Dired")))
1454
1455   (define-key image-dired-display-image-mode-map
1456     [menu-bar image-dired image-dired-kill-buffer-and-window]
1457     '("Quit" . image-dired-kill-buffer-and-window))
1458
1459   (define-key image-dired-display-image-mode-map
1460     [menu-bar image-dired image-dired-display-current-image-sized]
1461     '("Display original, sized to fit" . image-dired-display-current-image-sized))
1462
1463   (define-key image-dired-display-image-mode-map
1464     [menu-bar image-dired image-dired-display-current-image-full]
1465     '("Display original, full size" . image-dired-display-current-image-full))
1466
1467   )
1468
1469 (defun image-dired-display-current-image-full ()
1470   "Display current image in full size."
1471   (interactive)
1472   (let ((file (image-dired-original-file-name)))
1473     (if file
1474         (progn
1475           (image-dired-display-image file t)
1476           (message "Full size image displayed"))
1477       (error "No original file name at point"))))
1478
1479 (defun image-dired-display-current-image-sized ()
1480   "Display current image in sized to fit window dimensions."
1481   (interactive)
1482   (let ((file (image-dired-original-file-name)))
1483     (if file
1484         (progn
1485           (image-dired-display-image file)
1486           (message "Full size image displayed"))
1487       (error "No original file name at point"))))
1488
1489 (define-derived-mode image-dired-thumbnail-mode
1490   fundamental-mode "image-dired-thumbnail"
1491   "Browse and manipulate thumbnail images using dired.
1492 Use `image-dired-dired' and `image-dired-setup-dired-keybindings' to get a
1493 nice setup to start with."
1494   (image-dired-define-thumbnail-mode-keymap)
1495   (message "image-dired-thumbnail-mode enabled"))
1496
1497 (define-derived-mode image-dired-display-image-mode
1498   fundamental-mode "image-dired-image-display"
1499   "Mode for displaying and manipulating original image.
1500 Resized or in full-size."
1501   (image-dired-define-display-image-mode-keymap)
1502   (message "image-dired-display-image-mode enabled"))
1503
1504 ;;;###autoload
1505 (defun image-dired-setup-dired-keybindings ()
1506   "Setup easy-to-use keybindings for the commands to be used in dired mode.
1507 Note that n, p and <down> and <up> will be hijacked and bound to
1508 `image-dired-dired-x-line'."
1509   (interactive)
1510
1511   ;; Hijack previous and next line movement. Let C-p and C-b be
1512   ;; though...
1513
1514   (define-key dired-mode-map "p" 'image-dired-dired-previous-line)
1515   (define-key dired-mode-map "n" 'image-dired-dired-next-line)
1516   (define-key dired-mode-map [up] 'image-dired-dired-previous-line)
1517   (define-key dired-mode-map [down] 'image-dired-dired-next-line)
1518
1519   (define-key dired-mode-map (kbd "C-S-n") 'image-dired-next-line-and-display)
1520   (define-key dired-mode-map (kbd "C-S-p") 'image-dired-previous-line-and-display)
1521   (define-key dired-mode-map (kbd "C-S-m") 'image-dired-mark-and-display-next)
1522
1523   (define-key dired-mode-map "\C-td" 'image-dired-display-thumbs)
1524   (define-key dired-mode-map "\C-tt" 'image-dired-tag-files)
1525   (define-key dired-mode-map "\C-tr" 'image-dired-delete-tag)
1526   (define-key dired-mode-map [tab] 'image-dired-jump-thumbnail-buffer)
1527   (define-key dired-mode-map "\C-ti" 'image-dired-dired-display-image)
1528   (define-key dired-mode-map "\C-tx" 'image-dired-dired-display-external)
1529   (define-key dired-mode-map "\C-ta" 'image-dired-display-thumbs-append)
1530   (define-key dired-mode-map "\C-t." 'image-dired-display-thumb)
1531   (define-key dired-mode-map "\C-tc" 'image-dired-dired-comment-files)
1532   (define-key dired-mode-map "\C-tf" 'image-dired-mark-tagged-files)
1533
1534   ;; Menu for dired
1535   (define-key dired-mode-map [menu-bar image-dired]
1536     (cons "Image-Dired" (make-sparse-keymap "Image-Dired")))
1537
1538   (define-key dired-mode-map [menu-bar image-dired image-dired-copy-with-exif-file-name]
1539     '("Copy with EXIF file name" . image-dired-copy-with-exif-file-name))
1540
1541   (define-key dired-mode-map [menu-bar image-dired image-dired-dired-comment-files]
1542     '("Comment files" . image-dired-dired-comment-files))
1543
1544   (define-key dired-mode-map [menu-bar image-dired image-dired-mark-tagged-files]
1545     '("Mark tagged files" . image-dired-mark-tagged-files))
1546
1547   (define-key dired-mode-map [menu-bar image-dired image-dired-delete-tag]
1548     '("Remove tag from files" . image-dired-delete-tag))
1549
1550   (define-key dired-mode-map [menu-bar image-dired image-dired-tag-files]
1551     '("Tag files" . image-dired-tag-files))
1552
1553   (define-key dired-mode-map [menu-bar image-dired image-dired-jump-thumbnail-buffer]
1554     '("Jump to thumbnail buffer" . image-dired-jump-thumbnail-buffer))
1555
1556   (define-key dired-mode-map [menu-bar image-dired image-dired-toggle-movement-tracking]
1557     '("Toggle movement tracking" . image-dired-toggle-movement-tracking))
1558
1559   (define-key dired-mode-map
1560     [menu-bar image-dired image-dired-toggle-append-browsing]
1561     '("Toggle append browsing" . image-dired-toggle-append-browsing))
1562
1563   (define-key dired-mode-map
1564     [menu-bar image-dired image-dired-toggle-disp-props]
1565     '("Toggle display properties" . image-dired-toggle-dired-display-properties))
1566
1567   (define-key dired-mode-map
1568     [menu-bar image-dired image-dired-dired-display-external]
1569     '("Display in external viewer" . image-dired-dired-display-external))
1570   (define-key dired-mode-map
1571     [menu-bar image-dired image-dired-dired-display-image]
1572     '("Display image" . image-dired-dired-display-image))
1573   (define-key dired-mode-map
1574     [menu-bar image-dired image-dired-display-thumb]
1575     '("Display this thumbnail" . image-dired-display-thumb))
1576   (define-key dired-mode-map
1577     [menu-bar image-dired image-dired-display-thumbs-append]
1578     '("Display thumbnails append" . image-dired-display-thumbs-append))
1579   (define-key dired-mode-map
1580     [menu-bar image-dired image-dired-display-thumbs]
1581     '("Display thumbnails" . image-dired-display-thumbs))
1582
1583   (define-key dired-mode-map
1584     [menu-bar image-dired image-dired-create-thumbs]
1585     '("Create thumbnails for marked files" . image-dired-create-thumbs))
1586
1587   (define-key dired-mode-map
1588     [menu-bar image-dired image-dired-mark-and-display-next]
1589     '("Mark and display next" . image-dired-mark-and-display-next))
1590   (define-key dired-mode-map
1591     [menu-bar image-dired image-dired-previous-line-and-display]
1592     '("Display thumb for previous file" . image-dired-previous-line-and-display))
1593   (define-key dired-mode-map
1594     [menu-bar image-dired image-dired-next-line-and-display]
1595     '("Display thumb for next file" . image-dired-next-line-and-display)))
1596
1597 (declare-function clear-image-cache "image.c" (&optional filter))
1598
1599 (defun image-dired-create-thumbs (&optional arg)
1600   "Create thumbnail images for all marked files in dired.
1601 With prefix argument ARG, create thumbnails even if they already exist
1602 \(i.e. use this to refresh your thumbnails)."
1603   (interactive "P")
1604   (let (thumb-name files)
1605     (setq files (dired-get-marked-files))
1606     (mapcar
1607      (lambda (curr-file)
1608        (setq thumb-name (image-dired-thumb-name curr-file))
1609        ;; If the user overrides the exist check, we must clear the
1610        ;; image cache so that if the user wants to display the
1611        ;; thumbnail, it is not fetched from cache.
1612        (if arg
1613            (clear-image-cache))
1614        (if (or (not (file-exists-p thumb-name))
1615                arg)
1616            (if (not (= 0 (image-dired-create-thumb curr-file
1617                                              (image-dired-thumb-name curr-file))))
1618                (error "Thumb could not be created"))))
1619      files)))
1620
1621 (defvar image-dired-slideshow-timer nil
1622   "Slideshow timer.")
1623
1624 (defvar image-dired-slideshow-count 0
1625   "Keeping track on number of images in slideshow.")
1626
1627 (defvar image-dired-slideshow-times 0
1628   "Number of pictures to display in slideshow.")
1629
1630 (defun image-dired-slideshow-step ()
1631   "Step to next file, if `image-dired-slideshow-times' has not been reached."
1632   (if (< image-dired-slideshow-count image-dired-slideshow-times)
1633       (progn
1634         (message "%s" (1+ image-dired-slideshow-count))
1635         (setq image-dired-slideshow-count (1+ image-dired-slideshow-count))
1636         (image-dired-next-line-and-display))
1637     (image-dired-slideshow-stop)))
1638
1639 (defun image-dired-slideshow-start ()
1640   "Start slideshow.
1641 Ask user for number of images to show and the delay in between."
1642   (interactive)
1643   (setq image-dired-slideshow-count 0)
1644   (setq image-dired-slideshow-times (string-to-number (read-string "How many: ")))
1645   (let ((repeat (string-to-number
1646                  (read-string
1647                   "Delay, in seconds. Decimals are accepted : " "1"))))
1648     (setq image-dired-slideshow-timer
1649           (run-with-timer
1650            0 repeat
1651            'image-dired-slideshow-step))))
1652
1653 (defun image-dired-slideshow-stop ()
1654   "Cancel slideshow."
1655   (interactive)
1656   (cancel-timer image-dired-slideshow-timer))
1657
1658 (defun image-dired-delete-char ()
1659   "Remove current thumbnail from thumbnail buffer and line up."
1660   (interactive)
1661   (let ((inhibit-read-only t))
1662     (delete-char 1)
1663     (if (looking-at " ")
1664         (delete-char 1))))
1665
1666 ;;;###autoload
1667 (defun image-dired-display-thumbs-append ()
1668   "Append thumbnails to `image-dired-thumbnail-buffer'."
1669   (interactive)
1670   (image-dired-display-thumbs nil t t))
1671
1672 ;;;###autoload
1673 (defun image-dired-display-thumb ()
1674   "Shorthand for `image-dired-display-thumbs' with prefix argument."
1675   (interactive)
1676   (image-dired-display-thumbs t nil t))
1677
1678 (defun image-dired-line-up ()
1679   "Line up thumbnails according to `image-dired-thumbs-per-row'.
1680 See also `image-dired-line-up-dynamic'."
1681   (interactive)
1682   (let ((inhibit-read-only t))
1683     (goto-char (point-min))
1684     (while (and (not (image-dired-image-at-point-p))
1685                 (not (eobp)))
1686       (delete-char 1))
1687     (while (not (eobp))
1688       (forward-char)
1689       (while (and (not (image-dired-image-at-point-p))
1690                   (not (eobp)))
1691         (delete-char 1)))
1692     (goto-char (point-min))
1693     (let ((count 0))
1694       (while (not (eobp))
1695         (forward-char)
1696         (if (= image-dired-thumbs-per-row 1)
1697             (insert "\n")
1698           (insert " ")
1699           (setq count (1+ count))
1700           (when (and (= count (- image-dired-thumbs-per-row 1))
1701                      (not (eobp)))
1702             (forward-char)
1703             (insert "\n")
1704             (setq count 0)))))
1705     (goto-char (point-min))))
1706
1707 (defun image-dired-line-up-dynamic ()
1708   "Line up thumbnails images dynamically.
1709 Calculate how many thumbnails fit."
1710   (interactive)
1711   (let* ((char-width (frame-char-width))
1712         (width (image-dired-window-width-pixels (image-dired-thumbnail-window)))
1713         (image-dired-thumbs-per-row
1714          (/ width
1715             (+ (* 2 image-dired-thumb-relief)
1716                (* 2 image-dired-thumb-margin)
1717                image-dired-thumb-width char-width))))
1718     (image-dired-line-up)))
1719
1720 (defun image-dired-line-up-interactive ()
1721   "Line up thumbnails interactively.
1722 Ask user how many thumbnails should be displayed per row."
1723   (interactive)
1724   (let ((image-dired-thumbs-per-row
1725          (string-to-number (read-string "How many thumbs per row: "))))
1726     (if (not (> image-dired-thumbs-per-row 0))
1727         (message "Number must be greater than 0")
1728       (image-dired-line-up))))
1729
1730 (defun image-dired-thumbnail-display-external ()
1731   "Display original image for thumbnail at point using external viewer."
1732   (interactive)
1733   (let ((file (image-dired-original-file-name)))
1734     (if (not (image-dired-image-at-point-p))
1735         (message "No thumbnail at point")
1736       (if (not file)
1737           (message "No original file name found")
1738         (call-process shell-file-name nil nil nil shell-command-switch
1739                       (format "%s \"%s\"" image-dired-external-viewer file))))))
1740
1741 ;;;###autoload
1742 (defun image-dired-dired-display-external ()
1743   "Display file at point using an external viewer."
1744   (interactive)
1745   (let ((file (dired-get-filename)))
1746     (call-process shell-file-name nil nil nil shell-command-switch
1747                   (format "%s \"%s\"" image-dired-external-viewer file))))
1748
1749 (defun image-dired-window-width-pixels (window)
1750   "Calculate WINDOW width in pixels."
1751     (* (window-width window) (frame-char-width)))
1752
1753 (defun image-dired-window-height-pixels (window)
1754   "Calculate WINDOW height in pixels."
1755   ;; Note: The mode-line consumes one line
1756     (* (- (window-height window) 1) (frame-char-height)))
1757
1758 (defun image-dired-display-window ()
1759   "Return window where `image-dired-display-image-buffer' is visible."
1760   (get-window-with-predicate
1761    (lambda (window)
1762      (equal (buffer-name (window-buffer window)) image-dired-display-image-buffer))
1763    nil t))
1764
1765 (defun image-dired-thumbnail-window ()
1766   "Return window where `image-dired-thumbnail-buffer' is visible."
1767   (get-window-with-predicate
1768    (lambda (window)
1769      (equal (buffer-name (window-buffer window)) image-dired-thumbnail-buffer))
1770    nil t))
1771
1772 (defun image-dired-associated-dired-buffer-window ()
1773   "Return window where associated dired buffer is visible."
1774   (let (buf)
1775     (if (image-dired-image-at-point-p)
1776         (progn
1777           (setq buf (image-dired-associated-dired-buffer))
1778           (get-window-with-predicate
1779            (lambda (window)
1780              (equal (window-buffer window) buf))))
1781       (error "No thumbnail image at point"))))
1782
1783 (defun image-dired-display-window-width ()
1784   "Return width, in pixels, of image-dired's image display window."
1785   (- (image-dired-window-width-pixels (image-dired-display-window))
1786      image-dired-display-window-width-correction))
1787
1788 (defun image-dired-display-window-height ()
1789   "Return height, in pixels, of image-dired's image display window."
1790   (- (image-dired-window-height-pixels (image-dired-display-window))
1791      image-dired-display-window-height-correction))
1792
1793 (defun image-dired-display-image (file &optional original-size)
1794   "Display image FILE in image buffer.
1795 Use this when you want to display the image, semi sized, in a new
1796 window.  The image is sized to fit the display window (using a
1797 temporary file, don't worry).  Because of this, it will not be as
1798 quick as opening it directly, but on most modern systems it
1799 should feel snappy enough.
1800
1801 If optional argument ORIGINAL-SIZE is non-nil, display image in its
1802 original size."
1803   (let ((new-file (expand-file-name image-dired-temp-image-file))
1804         width height command ret
1805         (image-type 'jpeg))
1806     (setq file (expand-file-name file))
1807     (if (not original-size)
1808         (progn
1809           (setq width (image-dired-display-window-width))
1810           (setq height (image-dired-display-window-height))
1811           (setq command
1812                 (format-spec
1813                  image-dired-cmd-create-temp-image-options
1814                  (list
1815                   (cons ?p image-dired-cmd-create-temp-image-program)
1816                   (cons ?w width)
1817                   (cons ?h height)
1818                   (cons ?f file)
1819                   (cons ?t new-file))))
1820           (setq ret (call-process shell-file-name nil nil nil
1821                                   shell-command-switch command))
1822           (if (not (= 0 ret))
1823               (error "Could not resize image")))
1824       (setq image-type (image-type-from-file-name file))
1825       (copy-file file new-file t))
1826     (with-current-buffer (image-dired-create-display-image-buffer)
1827       (let ((inhibit-read-only t))
1828         (erase-buffer)
1829         (clear-image-cache)
1830         (image-dired-insert-image image-dired-temp-image-file image-type 0 0)
1831         (goto-char (point-min))
1832         (image-dired-update-property 'original-file-name file)))))
1833
1834 (defun image-dired-display-thumbnail-original-image (&optional arg)
1835   "Display current thumbnail's original image in display buffer.
1836 See documentation for `image-dired-display-image' for more information.
1837 With prefix argument ARG, display image in its original size."
1838   (interactive "P")
1839   (let ((file (image-dired-original-file-name)))
1840     (if (not (string-equal major-mode "image-dired-thumbnail-mode"))
1841         (message "Not in image-dired-thumbnail-mode")
1842       (if (not (image-dired-image-at-point-p))
1843           (message "No thumbnail at point")
1844         (if (not file)
1845             (message "No original file name found")
1846           (image-dired-create-display-image-buffer)
1847           (display-buffer image-dired-display-image-buffer)
1848           (image-dired-display-image file arg))))))
1849
1850
1851 ;;;###autoload
1852 (defun image-dired-dired-display-image (&optional arg)
1853   "Display current image file.
1854 See documentation for `image-dired-display-image' for more information.
1855 With prefix argument ARG, display image in its original size."
1856   (interactive "P")
1857   (image-dired-create-display-image-buffer)
1858   (display-buffer image-dired-display-image-buffer)
1859   (image-dired-display-image (dired-get-filename) arg))
1860
1861 (defun image-dired-image-at-point-p ()
1862   "Return true if there is an image-dired thumbnail at point."
1863   (get-text-property (point) 'image-dired-thumbnail))
1864
1865 (defun image-dired-rotate-thumbnail (degrees)
1866   "Rotate thumbnail DEGREES degrees."
1867   (if (not (image-dired-image-at-point-p))
1868       (message "No thumbnail at point")
1869     (let ((file (image-dired-thumb-name (image-dired-original-file-name)))
1870           command)
1871       (setq command (format-spec
1872                      image-dired-cmd-rotate-thumbnail-options
1873                      (list
1874                       (cons ?p image-dired-cmd-rotate-thumbnail-program)
1875                       (cons ?d degrees)
1876                       (cons ?t (expand-file-name file)))))
1877       (call-process shell-file-name nil nil nil shell-command-switch command)
1878       ;; Clear the cache to refresh image. I wish I could just refresh
1879       ;; the current file but I do not know how to do that. Yet...
1880       (clear-image-cache))))
1881
1882 (defun image-dired-rotate-thumbnail-left ()
1883   "Rotate thumbnail left (counter clockwise) 90 degrees.
1884 The result of the rotation is displayed in the image display area
1885 and a confirmation is needed before the original image files is
1886 overwritten.  This confirmation can be turned off using
1887 `image-dired-rotate-original-ask-before-overwrite'."
1888   (interactive)
1889   (image-dired-rotate-thumbnail "270"))
1890
1891 (defun image-dired-rotate-thumbnail-right ()
1892   "Rotate thumbnail counter right (clockwise) 90 degrees.
1893 The result of the rotation is displayed in the image display area
1894 and a confirmation is needed before the original image files is
1895 overwritten.  This confirmation can be turned off using
1896 `image-dired-rotate-original-ask-before-overwrite'."
1897   (interactive)
1898   (image-dired-rotate-thumbnail "90"))
1899
1900 (defun image-dired-refresh-thumb ()
1901   "Force creation of new image for current thumbnail."
1902   (interactive)
1903   (let ((file (image-dired-original-file-name)))
1904     (clear-image-cache)
1905     (image-dired-create-thumb file (image-dired-thumb-name file))))
1906
1907 (defun image-dired-rotate-original (degrees)
1908   "Rotate original image DEGREES degrees."
1909   (if (not (image-dired-image-at-point-p))
1910       (message "No image at point")
1911     (let ((file (image-dired-original-file-name))
1912           command)
1913       (if (not (string-match "\.[jJ][pP[eE]?[gG]$" file))
1914           (error "Only JPEG images can be rotated!"))
1915       (setq command (format-spec
1916                      image-dired-cmd-rotate-original-options
1917                      (list
1918                       (cons ?p image-dired-cmd-rotate-original-program)
1919                       (cons ?d degrees)
1920                       (cons ?o (expand-file-name file))
1921                       (cons ?t image-dired-temp-rotate-image-file))))
1922       (if (not (= 0 (call-process shell-file-name nil nil nil
1923                                   shell-command-switch command)))
1924           (error "Could not rotate image")
1925         (image-dired-display-image image-dired-temp-rotate-image-file)
1926         (if (or (and image-dired-rotate-original-ask-before-overwrite
1927                      (y-or-n-p
1928                       "Rotate to temp file OK.  Overwrite original image? "))
1929                 (not image-dired-rotate-original-ask-before-overwrite))
1930             (progn
1931               (copy-file image-dired-temp-rotate-image-file file t)
1932               (image-dired-refresh-thumb))
1933           (image-dired-display-image file))))))
1934
1935 (defun image-dired-rotate-original-left ()
1936   "Rotate original image left (counter clockwise) 90 degrees."
1937   (interactive)
1938   (image-dired-rotate-original "270"))
1939
1940 (defun image-dired-rotate-original-right ()
1941   "Rotate original image right (clockwise) 90 degrees."
1942   (interactive)
1943   (image-dired-rotate-original "90"))
1944
1945 (defun image-dired-get-exif-file-name (file)
1946   "Use the image's EXIF information to return a unique file name.
1947 The file name should be unique as long as you do not take more than
1948 one picture per second.  The original file name is suffixed at the end
1949 for traceability.  The format of the returned file name is
1950 YYYY_MM_DD_HH_MM_DD_ORIG_FILE_NAME.jpg.  Used from
1951 `image-dired-copy-with-exif-file-name'."
1952   (let (data no-exif-data-found)
1953     (if (not (string-match "\.[Jj][Pp][Ee]?[Gg]$" (expand-file-name file)))
1954         (progn
1955           (setq no-exif-data-found t)
1956           (setq data
1957                 (format-time-string
1958                  "%Y:%m:%d %H:%M:%S"
1959                  (nth 5 (file-attributes (expand-file-name file))))))
1960       (setq data (image-dired-get-exif-data (expand-file-name file)
1961                                       "DateTimeOriginal")))
1962     (while (string-match "[ :]" data)
1963       (setq data (replace-match "_" nil nil data)))
1964     (format "%s%s%s" data
1965             (if no-exif-data-found
1966                 "_noexif_"
1967               "_")
1968             (file-name-nondirectory file))))
1969
1970 (defun image-dired-thumbnail-set-image-description ()
1971   "Set the ImageDescription EXIF tag for the original image.
1972 If the image already has a value for this tag, it is used as the
1973 default value at the prompt."
1974   (interactive)
1975   (if (not (image-dired-image-at-point-p))
1976       (message "No thumbnail at point")
1977     (let* ((file (image-dired-original-file-name))
1978            (old-value (image-dired-get-exif-data file "ImageDescription")))
1979       (if (eq 0
1980               (image-dired-set-exif-data file "ImageDescription"
1981                                    (read-string "Value of ImageDescription: "
1982                                                 old-value)))
1983           (message "Successfully wrote ImageDescription tag.")
1984         (error "Could not write ImageDescription tag")))))
1985
1986 (defun image-dired-set-exif-data (file tag-name tag-value)
1987   "In FILE, set EXIF tag TAG-NAME to value TAG-VALUE."
1988   (let (command)
1989     (setq command (format-spec
1990                    image-dired-cmd-write-exif-data-options
1991                    (list
1992                     (cons ?p image-dired-cmd-write-exif-data-program)
1993                     (cons ?f (expand-file-name file))
1994                     (cons ?t tag-name)
1995                     (cons ?v tag-value))))
1996     (call-process shell-file-name nil nil nil shell-command-switch command)))
1997
1998 (defun image-dired-get-exif-data (file tag-name)
1999   "From FILE, return EXIF tag TAG-NAME."
2000   (let ((buf (get-buffer-create "*image-dired-get-exif-data*"))
2001         command tag-value)
2002     (setq command (format-spec
2003                    image-dired-cmd-read-exif-data-options
2004                    (list
2005                     (cons ?p image-dired-cmd-read-exif-data-program)
2006                     (cons ?f file)
2007                     (cons ?t tag-name))))
2008     (with-current-buffer buf
2009       (delete-region (point-min) (point-max))
2010       (if (not (eq (call-process shell-file-name nil t nil
2011                                  shell-command-switch command) 0))
2012           (error "Could not get EXIF tag")
2013         (goto-char (point-min))
2014         ;; Clean buffer from newlines and carriage returns before
2015         ;; getting final info
2016         (while (search-forward-regexp "[\n\r]" nil t)
2017           (replace-match "" nil t))
2018         (setq tag-value (buffer-substring (point-min) (point-max)))))
2019     tag-value))
2020
2021 (defun image-dired-copy-with-exif-file-name ()
2022   "Copy file with unique name to main image directory.
2023 Copy current or all marked files in dired to a new file in your
2024 main image directory, using a file name generated by
2025 `image-dired-get-exif-file-name'.  A typical usage for this if when
2026 copying images from a digital camera into the image directory.
2027
2028  Typically, you would open up the folder with the incoming
2029 digital images, mark the files to be copied, and execute this
2030 function.  The result is a couple of new files in
2031 `image-dired-main-image-directory' called
2032 2005_05_08_12_52_00_dscn0319.jpg,
2033 2005_05_08_14_27_45_dscn0320.jpg etc."
2034   (interactive)
2035   (let (new-name
2036         (files (dired-get-marked-files)))
2037     (mapcar
2038      (lambda (curr-file)
2039        (setq new-name
2040              (format "%s/%s"
2041                      (file-name-as-directory
2042                       (expand-file-name image-dired-main-image-directory))
2043                      (image-dired-get-exif-file-name curr-file)))
2044        (message "Copying %s to %s" curr-file new-name)
2045        (copy-file curr-file new-name))
2046      files)))
2047
2048 (defun image-dired-display-next-thumbnail-original ()
2049   "In thumbnail buffer, move to next thumbnail and display the image."
2050   (interactive)
2051   (image-dired-forward-image)
2052   (image-dired-display-thumbnail-original-image))
2053
2054 (defun image-dired-display-previous-thumbnail-original ()
2055   "Move to previous thumbnail and display image."
2056   (interactive)
2057   (image-dired-backward-image)
2058   (image-dired-display-thumbnail-original-image))
2059
2060 (defun image-dired-write-comments (file-comments)
2061   "Write file comments to database.
2062 Write file comments to one or more files.
2063 FILE-COMMENTS is an alist on the following form:
2064  ((FILE . COMMENT) ... )"
2065   (image-dired-sane-db-file)
2066   (let (end comment-beg-pos comment-end-pos file comment)
2067     (image-dired--with-db-file
2068      (setq buffer-file-name image-dired-db-file)
2069      (dolist (elt file-comments)
2070        (setq file (car elt)
2071              comment (cdr elt))
2072        (goto-char (point-min))
2073        (if (search-forward-regexp (format "^%s.*$" file) nil t)
2074            (progn
2075              (setq end (point))
2076              (beginning-of-line)
2077              ;; Delete old comment, if any
2078              (when (search-forward ";comment:" end t)
2079                (setq comment-beg-pos (match-beginning 0))
2080                ;; Any tags after the comment?
2081                (if (search-forward ";" end t)
2082                    (setq comment-end-pos (- (point) 1))
2083                  (setq comment-end-pos end))
2084                ;; Delete comment tag and comment
2085                (delete-region comment-beg-pos comment-end-pos))
2086              ;; Insert new comment
2087              (beginning-of-line)
2088              (unless (search-forward ";" end t)
2089                (end-of-line)
2090                (insert ";"))
2091              (insert (format "comment:%s;" comment)))
2092          ;; File does not exist in database - add it.
2093          (goto-char (point-max))
2094          (insert (format "\n%s;comment:%s" file comment))))
2095      (save-buffer))))
2096
2097 (defun image-dired-update-property (prop value)
2098   "Update text property PROP with value VALUE at point."
2099   (let ((inhibit-read-only t))
2100     (put-text-property
2101      (point) (1+ (point))
2102      prop
2103      value)))
2104
2105 ;;;###autoload
2106 (defun image-dired-dired-comment-files ()
2107   "Add comment to current or marked files in dired."
2108   (interactive)
2109   (let ((comment (image-dired-read-comment)))
2110     (image-dired-write-comments
2111      (mapcar
2112       (lambda (curr-file)
2113         (cons curr-file comment))
2114       (dired-get-marked-files)))))
2115
2116 (defun image-dired-comment-thumbnail ()
2117   "Add comment to current thumbnail in thumbnail buffer."
2118   (interactive)
2119   (let* ((file (image-dired-original-file-name))
2120          (comment (image-dired-read-comment file)))
2121     (image-dired-write-comments (list (cons file comment)))
2122     (image-dired-update-property 'comment comment))
2123   (image-dired-display-thumb-properties))
2124
2125 (defun image-dired-read-comment (&optional file)
2126   "Read comment for an image.
2127 Optionally use old comment from FILE as initial value."
2128   (let ((comment
2129          (read-string
2130           "Comment: "
2131           (if file (image-dired-get-comment file)))))
2132     comment))
2133
2134 (defun image-dired-get-comment (file)
2135   "Get comment for file FILE."
2136   (image-dired-sane-db-file)
2137   (image-dired--with-db-file
2138    (let (end comment-beg-pos comment-end-pos comment)
2139      (when (search-forward-regexp (format "^%s" file) nil t)
2140        (end-of-line)
2141        (setq end (point))
2142        (beginning-of-line)
2143        (when (search-forward ";comment:" end t)
2144          (setq comment-beg-pos (point))
2145          (if (search-forward ";" end t)
2146              (setq comment-end-pos (- (point) 1))
2147            (setq comment-end-pos end))
2148          (setq comment (buffer-substring
2149                         comment-beg-pos comment-end-pos))))
2150      comment)))
2151
2152 ;;;###autoload
2153 (defun image-dired-mark-tagged-files ()
2154   "Use regexp to mark files with matching tag.
2155 A `tag' is a keyword, a piece of meta data, associated with an
2156 image file and stored in image-dired's database file.  This command
2157 lets you input a regexp and this will be matched against all tags
2158 on all image files in the database file.  The files that have a
2159 matching tag will be marked in the dired buffer."
2160   (interactive)
2161   (image-dired-sane-db-file)
2162   (let ((tag (read-string "Mark tagged files (regexp): "))
2163         (hits 0)
2164         files)
2165     (image-dired--with-db-file
2166      ;; Collect matches
2167      (while (search-forward-regexp
2168              (concat "\\(^[^;\n]+\\);.*" tag ".*$") nil t)
2169        (push (match-string 1) files)))
2170     ;; Mark files
2171     (dolist (curr-file files)
2172       ;; I tried using `dired-mark-files-regexp' but it was waaaay to
2173       ;; slow.  Don't bother about hits found in other directories
2174       ;; than the current one.
2175       (when (string= (file-name-as-directory
2176                       (expand-file-name default-directory))
2177                      (file-name-as-directory
2178                       (file-name-directory curr-file)))
2179         (setq curr-file (file-name-nondirectory curr-file))
2180         (goto-char (point-min))
2181         (when (search-forward-regexp (format "\\s %s$" curr-file) nil t)
2182           (setq hits (+ hits 1))
2183           (dired-mark 1))))
2184     (message "%d files with matching tag marked." hits)))
2185
2186 (defun image-dired-mouse-display-image (event)
2187   "Use mouse EVENT, call `image-dired-display-image' to display image.
2188 Track this in associated dired buffer if `image-dired-track-movement' is
2189 non-nil."
2190   (interactive "e")
2191   (mouse-set-point event)
2192   (goto-char (posn-point (event-end event)))
2193   (let ((file (image-dired-original-file-name)))
2194     (when file
2195       (if image-dired-track-movement
2196           (image-dired-track-original-file))
2197       (image-dired-create-display-image-buffer)
2198       (display-buffer image-dired-display-image-buffer)
2199       (image-dired-display-image file))))
2200
2201 (defun image-dired-mouse-select-thumbnail (event)
2202   "Use mouse EVENT to select thumbnail image.
2203 Track this in associated dired buffer if `image-dired-track-movement' is
2204 non-nil."
2205   (interactive "e")
2206   (mouse-set-point event)
2207   (goto-char (posn-point (event-end event)))
2208   (if image-dired-track-movement
2209       (image-dired-track-original-file))
2210   (image-dired-display-thumb-properties))
2211
2212 (defun image-dired-mouse-toggle-mark (event)
2213   "Use mouse EVENT to toggle dired mark for thumbnail.
2214 Track this in associated dired buffer if `image-dired-track-movement' is
2215 non-nil."
2216   (interactive "e")
2217   (mouse-set-point event)
2218   (goto-char (posn-point (event-end event)))
2219   (if image-dired-track-movement
2220       (image-dired-track-original-file))
2221   (image-dired-toggle-mark-thumb-original-file))
2222
2223 (defun image-dired-dired-display-properties ()
2224   "Display properties for dired file in the echo area."
2225   (interactive)
2226   (let* ((file (dired-get-filename))
2227          (file-name (file-name-nondirectory file))
2228          (dired-buf (buffer-name (current-buffer)))
2229          (props (mapconcat
2230                  'princ
2231                  (image-dired-list-tags file)
2232                  ", "))
2233          (comment (image-dired-get-comment file)))
2234     (if file-name
2235         (message "%s"
2236          (image-dired-format-properties-string
2237           dired-buf
2238           file-name
2239           props
2240           comment)))))
2241
2242 (defvar image-dired-tag-file-list nil
2243   "List to store tag-file structure.")
2244
2245 (defvar image-dired-file-tag-list nil
2246   "List to store file-tag structure.")
2247
2248 (defvar image-dired-file-comment-list nil
2249   "List to store file comments.")
2250
2251 (defun image-dired-add-to-tag-file-list (tag file)
2252   "Add relation between TAG and FILE."
2253   (let (curr)
2254     (if image-dired-tag-file-list
2255         (if (setq curr (assoc tag image-dired-tag-file-list))
2256             (if (not (member file curr))
2257                 (setcdr curr (cons file (cdr curr))))
2258           (setcdr image-dired-tag-file-list
2259                   (cons (list tag file) (cdr image-dired-tag-file-list))))
2260       (setq image-dired-tag-file-list (list (list tag file))))))
2261
2262 (defun image-dired-add-to-tag-file-lists (tag file)
2263   "Helper function used from `image-dired-create-gallery-lists'.
2264
2265 Add TAG to FILE in one list and FILE to TAG in the other.
2266
2267 Lisp structures look like the following:
2268
2269 image-dired-file-tag-list:
2270
2271   ((\"filename1\" \"tag1\" \"tag2\" \"tag3\" ...)
2272    (\"filename2\" \"tag1\" \"tag2\" \"tag3\" ...)
2273    ...)
2274
2275 image-dired-tag-file-list:
2276
2277  ((\"tag1\" \"filename1\" \"filename2\" \"filename3\" ...)
2278   (\"tag2\" \"filename1\" \"filename2\" \"filename3\" ...)
2279   ...)"
2280   ;; Add tag to file list
2281   (let (curr)
2282     (if image-dired-file-tag-list
2283         (if (setq curr (assoc file image-dired-file-tag-list))
2284             (setcdr curr (cons tag (cdr curr)))
2285           (setcdr image-dired-file-tag-list
2286                   (cons (list file tag) (cdr image-dired-file-tag-list))))
2287       (setq image-dired-file-tag-list (list (list file tag))))
2288     ;; Add file to tag list
2289     (if image-dired-tag-file-list
2290         (if (setq curr (assoc tag image-dired-tag-file-list))
2291             (if (not (member file curr))
2292                 (setcdr curr (cons file (cdr curr))))
2293           (setcdr image-dired-tag-file-list
2294                   (cons (list tag file) (cdr image-dired-tag-file-list))))
2295       (setq image-dired-tag-file-list (list (list tag file))))))
2296
2297 (defun image-dired-add-to-file-comment-list (file comment)
2298   "Helper function used from `image-dired-create-gallery-lists'.
2299
2300 For FILE, add COMMENT to list.
2301
2302 Lisp structure looks like the following:
2303
2304 image-dired-file-comment-list:
2305
2306   ((\"filename1\" .  \"comment1\")
2307    (\"filename2\" .  \"comment2\")
2308    ...)"
2309   (if image-dired-file-comment-list
2310       (if (not (assoc file image-dired-file-comment-list))
2311           (setcdr image-dired-file-comment-list
2312                   (cons (cons file comment)
2313                         (cdr image-dired-file-comment-list))))
2314     (setq image-dired-file-comment-list (list (cons file comment)))))
2315
2316 (defun image-dired-create-gallery-lists ()
2317   "Create temporary lists used by `image-dired-gallery-generate'."
2318   (image-dired-sane-db-file)
2319   (image-dired--with-db-file
2320    (let (end beg file row-tags)
2321      (setq image-dired-tag-file-list nil)
2322      (setq image-dired-file-tag-list nil)
2323      (setq image-dired-file-comment-list nil)
2324      (goto-char (point-min))
2325      (while (search-forward-regexp "^." nil t)
2326        (end-of-line)
2327        (setq end (point))
2328        (beginning-of-line)
2329        (setq beg (point))
2330        (unless (search-forward ";" end nil)
2331          (error "Something is really wrong, check format of database"))
2332        (setq row-tags (split-string
2333                        (buffer-substring beg end) ";"))
2334        (setq file (car row-tags))
2335        (dolist (x (cdr row-tags))
2336          (if (not (string-match "^comment:\\(.*\\)" x))
2337              (image-dired-add-to-tag-file-lists x file)
2338            (image-dired-add-to-file-comment-list file (match-string 1 x)))))))
2339   ;; Sort tag-file list
2340   (setq image-dired-tag-file-list
2341         (sort image-dired-tag-file-list
2342               (lambda (x y)
2343                 (string< (car x) (car y))))))
2344
2345 (defun image-dired-hidden-p (file)
2346   "Return t if image FILE has a \"hidden\" tag."
2347   (let (hidden)
2348     (mapc
2349      (lambda (tag)
2350        (if (member tag image-dired-gallery-hidden-tags)
2351            (setq hidden t)))
2352      (cdr (assoc file image-dired-file-tag-list)))
2353     hidden))
2354
2355 (defun image-dired-gallery-generate ()
2356   "Generate gallery pages.
2357 First we create a couple of Lisp structures from the database to make
2358 it easier to generate, then HTML-files are created in
2359 `image-dired-gallery-dir'."
2360   (interactive)
2361   (if (eq 'per-directory image-dired-thumbnail-storage)
2362       (error "Currently, gallery generation is not supported \
2363 when using per-directory thumbnail file storage"))
2364   (image-dired-create-gallery-lists)
2365   (let ((tags image-dired-tag-file-list)
2366         (index-file (format "%s/index.html" image-dired-gallery-dir))
2367         count tag tag-file
2368         comment file-tags tag-link tag-link-list)
2369     ;; Make sure gallery root exist
2370     (if (file-exists-p image-dired-gallery-dir)
2371         (if (not (file-directory-p image-dired-gallery-dir))
2372             (error "Variable image-dired-gallery-dir is not a directory"))
2373       (make-directory image-dired-gallery-dir))
2374     ;; Open index file
2375     (with-temp-file index-file
2376       (if (file-exists-p index-file)
2377           (insert-file-contents index-file))
2378       (insert "<html>\n")
2379       (insert "  <body>\n")
2380       (insert "   <h2>Image-Dired Gallery</h2>\n")
2381       (insert (format "<p>\n    Gallery generated %s\n   <p>\n"
2382                       (current-time-string)))
2383       (insert "   <h3>Tag index</h3>\n")
2384       (setq count 1)
2385       ;; Pre-generate list of all tag links
2386       (dolist (curr tags)
2387         (setq tag (car curr))
2388         (when (not (member tag image-dired-gallery-hidden-tags))
2389           (setq tag-link (format "<a href=\"%d.html\">%s</a>" count tag))
2390           (if tag-link-list
2391               (setq tag-link-list
2392                     (append tag-link-list (list (cons tag tag-link))))
2393             (setq tag-link-list (list (cons tag tag-link))))
2394           (setq count (1+ count))))
2395       (setq count 1)
2396       ;; Main loop where we generated thumbnail pages per tag
2397       (dolist (curr tags)
2398         (setq tag (car curr))
2399         ;; Don't display hidden tags
2400         (when (not (member tag image-dired-gallery-hidden-tags))
2401           ;; Insert link to tag page in index
2402           (insert (format "    %s<br>\n" (cdr (assoc tag tag-link-list))))
2403           ;; Open per-tag file
2404           (setq tag-file (format "%s/%s.html" image-dired-gallery-dir count))
2405           (with-temp-file tag-file
2406             (if (file-exists-p tag-file)
2407                 (insert-file-contents tag-file))
2408             (erase-buffer)
2409             (insert "<html>\n")
2410             (insert "  <body>\n")
2411             (insert "  <p><a href=\"index.html\">Index</a></p>\n")
2412             (insert (format "  <h2>Images with tag &quot;%s&quot;</h2>" tag))
2413             ;; Main loop for files per tag page
2414             (dolist (file (cdr curr))
2415               (unless (image-dired-hidden-p file)
2416                 ;; Insert thumbnail with link to full image
2417                 (insert
2418                  (format "<a href=\"%s/%s\"><img src=\"%s/%s\"%s></a>\n"
2419                          image-dired-gallery-image-root-url
2420                          (file-name-nondirectory file)
2421                          image-dired-gallery-thumb-image-root-url
2422                          (file-name-nondirectory (image-dired-thumb-name file)) file))
2423                 ;; Insert comment, if any
2424                 (if (setq comment (cdr (assoc file image-dired-file-comment-list)))
2425                     (insert (format "<br>\n%s<br>\n" comment))
2426                   (insert "<br>\n"))
2427                 ;; Insert links to other tags, if any
2428                 (when (> (length
2429                           (setq file-tags (assoc file image-dired-file-tag-list))) 2)
2430                   (insert "[ ")
2431                   (dolist (extra-tag file-tags)
2432                     ;; Only insert if not file name or the main tag
2433                     (if (and (not (equal extra-tag tag))
2434                              (not (equal extra-tag file)))
2435                         (insert
2436                          (format "%s " (cdr (assoc extra-tag tag-link-list))))))
2437                   (insert "]<br>\n"))))
2438             (insert "  <p><a href=\"index.html\">Index</a></p>\n")
2439             (insert "  </body>\n")
2440             (insert "</html>\n"))
2441           (setq count (1+ count))))
2442       (insert "  </body>\n")
2443       (insert "</html>"))))
2444
2445 (defun image-dired-kill-buffer-and-window ()
2446   "Kill the current buffer and, if possible, also the window."
2447   (interactive)
2448   (let ((buffer (current-buffer)))
2449     (condition-case nil
2450         (delete-window (selected-window))
2451       (error nil))
2452     (kill-buffer buffer)))
2453
2454 (defvar image-dired-widget-list nil
2455   "List to keep track of meta data in edit buffer.")
2456
2457 (declare-function widget-forward "wid-edit" (arg))
2458
2459 ;;;###autoload
2460 (defun image-dired-dired-edit-comment-and-tags ()
2461   "Edit comment and tags of current or marked image files.
2462 Edit comment and tags for all marked image files in an
2463 easy-to-use form."
2464   (interactive)
2465   (setq image-dired-widget-list nil)
2466   ;; Setup buffer.
2467   (let ((files (dired-get-marked-files)))
2468     (switch-to-buffer "*Image-Dired Edit Meta Data*")
2469     (kill-all-local-variables)
2470     (make-local-variable 'widget-example-repeat)
2471     (let ((inhibit-read-only t))
2472       (erase-buffer))
2473     (remove-overlays)
2474     ;; Some help for the user.
2475     (widget-insert
2476 "\nEdit comments and tags for each image.  Separate multiple tags
2477 with a comma.  Move forward between fields using TAB or RET.
2478 Move to the previous field using backtab (S-TAB).  Save by
2479 activating the Save button at the bottom of the form or cancel
2480 the operation by activating the Cancel button.\n\n")
2481     ;; Here comes all images and a comment and tag field for each
2482     ;; image.
2483     (let (thumb-file img comment-widget tag-widget)
2484
2485       (dolist (file files)
2486
2487        (setq thumb-file (image-dired-thumb-name file)
2488              img (create-image thumb-file))
2489
2490        (insert-image img)
2491        (widget-insert "\n\nComment: ")
2492        (setq comment-widget
2493              (widget-create 'editable-field
2494                             :size 60
2495                             :format "%v "
2496                             :value (or (image-dired-get-comment file) "")))
2497        (widget-insert "\nTags:    ")
2498        (setq tag-widget
2499              (widget-create 'editable-field
2500                             :size 60
2501                             :format "%v "
2502                             :value (or (mapconcat
2503                                         (lambda (tag)
2504                                           tag)
2505                                         (image-dired-list-tags file)
2506                                         ",") "")))
2507        ;; Save information in all widgets so that we can use it when
2508        ;; the user saves the form.
2509        (setq image-dired-widget-list
2510              (append image-dired-widget-list
2511                      (list (list file comment-widget tag-widget))))
2512        (widget-insert "\n\n")))
2513
2514     ;; Footer with Save and Cancel button.
2515     (widget-insert "\n")
2516     (widget-create 'push-button
2517                  :notify
2518                  (lambda (&rest _ignore)
2519                    (image-dired-save-information-from-widgets)
2520                    (bury-buffer)
2521                    (message "Done."))
2522                  "Save")
2523     (widget-insert " ")
2524     (widget-create 'push-button
2525                    :notify
2526                    (lambda (&rest _ignore)
2527                      (bury-buffer)
2528                      (message "Operation canceled."))
2529                    "Cancel")
2530     (widget-insert "\n")
2531     (use-local-map widget-keymap)
2532     (widget-setup)
2533     ;; Jump to the first widget.
2534     (widget-forward 1)))
2535
2536 (defun image-dired-save-information-from-widgets ()
2537   "Save information found in `image-dired-widget-list'.
2538 Use the information in `image-dired-widget-list' to save comments and
2539 tags to their respective image file.  Internal function used by
2540 `image-dired-dired-edit-comment-and-tags'."
2541   (let (file comment tag-string tag-list lst)
2542     (image-dired-write-comments
2543           (mapcar
2544            (lambda (widget)
2545              (setq file (car widget)
2546                    comment (widget-value (cadr widget)))
2547              (cons file comment))
2548            image-dired-widget-list))
2549     (image-dired-write-tags
2550      (dolist (widget image-dired-widget-list lst)
2551        (setq file (car widget)
2552              tag-string (widget-value (car (cddr widget)))
2553              tag-list (split-string tag-string ","))
2554        (dolist (tag tag-list)
2555          (push (cons file tag) lst))))))
2556
2557 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
2558 ;;;;;;;;; TEST-SECTION ;;;;;;;;;;;
2559 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
2560
2561 ;; (defvar image-dired-dir-max-size 12300000)
2562
2563 ;; (defun image-dired-test-clean-old-files ()
2564 ;;   "Clean `image-dired-dir' from old thumbnail files.
2565 ;; \"Oldness\" measured using last access time.  If the total size of all
2566 ;; thumbnail files in `image-dired-dir' is larger than 'image-dired-dir-max-size',
2567 ;; old files are deleted until the max size is reached."
2568 ;;   (let* ((files
2569 ;;           (sort
2570 ;;            (mapcar
2571 ;;             (lambda (f)
2572 ;;               (let ((fattribs (file-attributes f)))
2573 ;;                 ;; Get last access time and file size
2574 ;;                 `(,(nth 4 fattribs) ,(nth 7 fattribs) ,f)))
2575 ;;             (directory-files (image-dired-dir) t ".+\.thumb\..+$"))
2576 ;;            ;; Sort function. Compare time between two files.
2577 ;;            (lambda (l1 l2)
2578 ;;               (time-less-p (car l1) (car l2)))))
2579 ;;          (dirsize (apply '+ (mapcar (lambda (x) (cadr x)) files))))
2580 ;;     (while (> dirsize image-dired-dir-max-size)
2581 ;;       (y-or-n-p
2582 ;;        (format "Size of thumbnail directory: %d, delete old file %s? "
2583 ;;                dirsize (cadr (cdar files))))
2584 ;;       (delete-file (cadr (cdar files)))
2585 ;;       (setq dirsize (- dirsize (car (cdar files))))
2586 ;;       (setq files (cdr files)))))
2587
2588 ;;;;;;;;;;;;;;;;;;;;;;,
2589
2590 ;; (defun dired-speedbar-buttons (dired-buffer)
2591 ;;   (when (and (boundp 'image-dired-use-speedbar)
2592 ;;           image-dired-use-speedbar)
2593 ;;     (let ((filename (with-current-buffer dired-buffer
2594 ;;                    (dired-get-filename))))
2595 ;;       (when (and (not (string-equal filename (buffer-string)))
2596 ;;               (string-match (image-file-name-regexp) filename))
2597 ;;      (erase-buffer)
2598 ;;      (insert (propertize
2599 ;;               filename
2600 ;;               'display
2601 ;;               (image-dired-get-thumbnail-image filename)))))))
2602
2603 ;; (setq image-dired-use-speedbar t)
2604
2605 (provide 'image-dired)
2606
2607 ;;; image-dired.el ends here