lisp/thumbs.el

   1 ;;; thumbs.el --- Thumbnails previewer for images files
   2
   3 ;; Copyright 2004 Free Software Foundation, Inc
   4
   5 ;; Author: Jean-Philippe Theberge <jphiltheberge@videotron.ca>
   6 ;; Keywords: Multimedia
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24 ;;
  25 ;; Thanks: Alex Schroeder <alex@gnu.org> for maintaining the package at some time
  26 ;;         The peoples at #emacs@freenode.net for numerous help
  27 ;;         RMS for emacs and the GNU project.
  28 ;;
  29
  30 ;;; Commentary:
  31
  32 ;; This package create two new mode: thumbs-mode and
  33 ;; thumbs-view-image-mode.  It is used for images browsing and viewing
  34 ;; from within Emacs.  Minimal image manipulation functions are also
  35 ;; available via external programs.
  36 ;;
  37 ;; The 'convert' program from 'ImageMagick'
  38 ;; [URL:http://www.imagemagick.org/] is required.
  39 ;;
  40 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  41 ;; CHANGELOG
  42 ;;
  43 ;; This is version 2.0
  44 ;;
  45 ;; USAGE
  46 ;;
  47 ;; Type M-x thumbs RET DIR RET to view the directory DIR in Thumbs mode.
  48 ;; That should be a directory containing image files.
  49 ;; from dired, C-t m enter in thumbs-mode with all marked files
  50 ;;             C-t a enter in thumbs-mode with all files in current-directory
  51 ;; In thumbs-mode, pressing <return> on a image will bring you in image view mode
  52 ;; for that image.  C-h m will give you a list of available keybinding.
  53
  54 ;;; History:
  55 ;;
  56
  57 ;;; Code:
  58
  59 (require 'dired)
  60
  61 ;; CUSTOMIZATIONS
  62
  63 (defgroup thumbs nil
  64   "Thumbnails previewer."
  65   :version "21.4"
  66   :group 'multimedia)
  67
  68 (defcustom thumbs-thumbsdir
  69   (expand-file-name "~/.emacs-thumbs")
  70   "*Directory to store thumbnails."
  71   :type 'directory
  72   :group 'thumbs)
  73
  74 (defcustom thumbs-geometry "100x100"
  75   "*Size of thumbnails."
  76   :type 'string
  77   :group 'thumbs)
  78
  79 (defcustom thumbs-per-line 5
  80   "*Number of thumbnails per line to show in directory."
  81   :type 'string
  82   :group 'thumbs)
  83
  84 (defcustom thumbs-thumbsdir-max-size 50000000
  85   "Max size for thumbnails directory.
  86 When it reach that size (in bytes), a warning is send."
  87   :type 'string
  88   :group 'thumbs)
  89
  90 (defcustom thumbs-conversion-program
  91   (if (equal 'windows-nt system-type)
  92       "convert.exe"
  93     (or (executable-find "convert")
  94         "/usr/X11R6/bin/convert"))
  95   "*Name of conversion program for thumbnails generation.
  96 It must be 'convert'."
  97   :type 'string
  98   :group 'thumbs)
  99
 100 (defcustom thumbs-setroot-command
 101   "xloadimage -onroot -fullscreen *"
 102   "Command to set the root window."
 103   :type 'string
 104   :group 'thumbs)
 105
 106 (defcustom thumbs-relief 5
 107   "*Size of button-like border around thumbnails."
 108   :type 'string
 109   :group 'thumbs)
 110
 111 (defcustom thumbs-margin 2
 112   "*Size of the margin around thumbnails.
 113 This is where you see the cursor."
 114   :type 'string
 115   :group 'thumbs)
 116
 117 (defcustom thumbs-thumbsdir-auto-clean t
 118   "If set, delete older file in the thumbnails directory.
 119 Deletion is done at load time when the directory size is bigger
 120 than 'thumbs-thumbsdir-max-size'."
 121   :type 'boolean
 122   :group 'thumbs)
 123
 124 (defcustom thumbs-image-resizing-step 10
 125   "Step by wich to resize image."
 126   :type 'string
 127   :group 'thumbs)
 128
 129 (defcustom thumbs-temp-dir
 130   "/tmp/"
 131   "Temporary directory to use.
 132 Leaving it to default '/tmp/' can let another user
 133 see some of your images."
 134   :type 'directory
 135   :group 'thumbs)
 136
 137 (defcustom thumbs-temp-prefix "emacsthumbs"
 138   "Prefix to add to temp files."
 139   :type 'string
 140   :group 'thumbs)
 141
 142 ;; Initialize some variable, for later use.
 143 (defvar thumbs-temp-file
 144   (concat thumbs-temp-dir thumbs-temp-prefix)
 145   "Temporary filesname for images.")
 146
 147 (defvar thumbs-current-tmp-filename
 148   nil
 149   "Temporary filename of current image.")
 150 (defvar thumbs-current-image-filename
 151   nil
 152   "Filename of current image.")
 153 (defvar thumbs-current-image-size
 154   nil
 155   "Size of current image.")
 156 (defvar thumbs-image-num
 157   nil
 158   "Number of current image.")
 159 (defvar thumbs-current-dir
 160   nil
 161   "Current directory.")
 162 (defvar thumbs-markedL
 163   nil
 164   "List of marked files.")
 165
 166 ;; Make sure auto-image-file-mode is ON.
 167 (auto-image-file-mode t)
 168
 169 ;; Create the thumbs directory if it does not exists.
 170 (setq thumbs-thumbsdir (expand-file-name thumbs-thumbsdir))
 171
 172 (when (not (file-directory-p thumbs-thumbsdir))
 173   (progn
 174     (make-directory thumbs-thumbsdir)
 175     (message "Creating thumbnails directory")))
 176
 177 (defvar thumbs-gensym-counter 0)
 178
 179 (defun thumbs-gensym (&optional arg)
 180   "Generate a new uninterned symbol.
 181 The name is made by appending a number to PREFIX, default \"Thumbs\"."
 182   (let ((prefix (if (stringp arg) arg "Thumbs"))
 183         (num (if (integerp arg) arg
 184                (prog1
 185                    thumbs-gensym-counter
 186                  (setq thumbs-gensym-counter (1+ thumbs-gensym-counter))))))
 187     (make-symbol (format "%s%d" prefix num))))
 188
 189 (defun thumbs-cleanup-thumbsdir ()
 190   "Clean the thumbnails directory.
 191 If the total size of all files in 'thumbs-thumbsdir' is bigger than
 192 'thumbs-thumbsdir-max-size', files are deleted until the max size is
 193 reached."
 194   (let* ((filesL
 195           (sort
 196            (mapcar
 197             (lambda (f)
 198               (let ((fattribsL (file-attributes f)))
 199                 `(,(nth 4 fattribsL) ,(nth 7 fattribsL) ,f)))
 200             (directory-files thumbs-thumbsdir t (image-file-name-regexp)))
 201            '(lambda (l1 l2) (time-less-p (car l1)(car l2)))))
 202          (dirsize (apply '+ (mapcar (lambda (x) (cadr x)) filesL))))
 203     (while (> dirsize thumbs-thumbsdir-max-size)
 204       (progn
 205         (message "Deleting file %s" (cadr (cdar filesL))))
 206       (delete-file (cadr (cdar filesL)))
 207       (setq dirsize (- dirsize (car (cdar filesL))))
 208       (setq filesL (cdr filesL)))))
 209
 210 ;; Check the thumbsnail directory size and clean it if necessary.
 211 (when thumbs-thumbsdir-auto-clean
 212   (thumbs-cleanup-thumbsdir))
 213
 214 (defun thumbs-call-convert (filein fileout action
 215                                    &optional arg output-format action-prefix)
 216   "Call the convert program.
 217 FILEIN is the input file,
 218 FILEOUT is the output file,
 219 ACTION is the command to send to convert.
 220 Optional argument are:
 221 ARG any arguments to the ACTION command,
 222 OUTPUT-FORMAT is the file format to output, default is jpeg
 223 ACTION-PREFIX is the symbol to place before the ACTION command
 224               (default to '-' but can sometime be '+')."
 225   (let ((command (format "%s %s%s %s \"%s\" \"%s:%s\""
 226                          thumbs-conversion-program
 227                          (or action-prefix "-")
 228                          action
 229                          (or arg "")
 230                          filein
 231                          (or output-format "jpeg")
 232                          fileout)))
 233     (shell-command command)))
 234
 235 (defun thumbs-increment-image-size-element (n d)
 236   "Increment number N by D percent."
 237   (round (+ n (/ (* d n) 100))))
 238
 239 (defun thumbs-decrement-image-size-element (n d)
 240   "Decrement number N by D percent."
 241   (round (- n (/ (* d n) 100))))
 242
 243 (defun thumbs-increment-image-size (s)
 244   "Increment S (a cons of width x heigh)."
 245   (cons
 246    (thumbs-increment-image-size-element (car s)
 247                                         thumbs-image-resizing-step)
 248    (thumbs-increment-image-size-element (cdr s)
 249                                         thumbs-image-resizing-step)))
 250
 251 (defun thumbs-decrement-image-size (s)
 252   "Decrement S (a cons of width x heigh)."
 253   (cons
 254    (thumbs-decrement-image-size-element (car s)
 255                                         thumbs-image-resizing-step)
 256    (thumbs-decrement-image-size-element (cdr s)
 257                                         thumbs-image-resizing-step)))
 258
 259 (defun thumbs-resize-image (&optional increment size)
 260   "Resize image in current buffer.
 261 if INCREMENT is set, make the image bigger, else smaller.
 262 Or, alternatively, a SIZE may be specified."
 263   (interactive)
 264   ;; cleaning of old temp file
 265   (condition-case nil
 266     (apply 'delete-file
 267            (directory-files
 268             thumbs-temp-dir t
 269             thumbs-temp-prefix))
 270     (error nil))
 271   (let ((buffer-read-only nil)
 272         (x (if size
 273                size
 274              (if increment
 275                  (thumbs-increment-image-size
 276                   thumbs-current-image-size)
 277                (thumbs-decrement-image-size
 278                 thumbs-current-image-size))))
 279         (tmp (format "%s%s.jpg" thumbs-temp-file (thumbs-gensym))))
 280     (erase-buffer)
 281     (thumbs-call-convert thumbs-current-image-filename
 282                          tmp "sample"
 283                          (concat (number-to-string (car x)) "x"
 284                                  (number-to-string (cdr x))))
 285     (thumbs-insert-image tmp 'jpeg 0)
 286     (setq thumbs-current-tmp-filename tmp)))
 287
 288 (defun thumbs-resize-interactive (width height)
 289   "Resize Image interactively to specified WIDTH and HEIGHT."
 290   (interactive "nWidth: \nnHeight: ")
 291   (thumbs-resize-image nil (cons width height)))
 292
 293 (defun thumbs-resize-image-size-down ()
 294   "Resize image (smaller)."
 295   (interactive)
 296   (thumbs-resize-image nil))
 297
 298 (defun thumbs-resize-image-size-up ()
 299   "Resize image (bigger)."
 300   (interactive)
 301   (thumbs-resize-image t))
 302
 303 (defun thumbs-thumbname (img)
 304   "Return a thumbnail name for the image IMG."
 305   (concat thumbs-thumbsdir "/"
 306           (subst-char-in-string
 307            ?\  ?\_
 308            (apply
 309             'concat
 310             (split-string
 311              (expand-file-name img) "/")))))
 312
 313 (defun thumbs-make-thumb (img)
 314   "Create the thumbnail for IMG."
 315   (let* ((fn (expand-file-name img))
 316          (tn (thumbs-thumbname img)))
 317     (if (or (not (file-exists-p tn))
 318             ;;  This is not the right fix, but I don't understand
 319             ;;  the external program or why it produces a geometry
 320             ;;  unequal to the one requested -- rms.
 321 ;;;         (not (equal (thumbs-file-size tn) thumbs-geometry))
 322             )
 323         (thumbs-call-convert fn tn "sample" thumbs-geometry))
 324     tn))
 325
 326 (defun thumbs-image-type (img)
 327   "Return image type from filename IMG."
 328   (cond ((string-match ".*\\.jpe?g\\'" img) 'jpeg)
 329         ((string-match ".*\\.xpm\\'" img) 'xpm)
 330         ((string-match ".*\\.xbm\\'" img) 'xbm)
 331         ((string-match ".*\\.gif\\'" img) 'gif)
 332         ((string-match ".*\\.bmp\\'" img) 'bmp)
 333         ((string-match ".*\\.png\\'" img) 'png)
 334         ((string-match ".*\\.tiff?\\'" img) 'tiff)))
 335
 336 (defun thumbs-file-size (img)
 337   (let ((i (image-size (find-image `((:type ,(thumbs-image-type img) :file ,img))) t)))
 338     (concat (number-to-string (round (car i)))
 339             "x"
 340             (number-to-string (round (cdr i))))))
 341
 342 ;;;###autoload
 343 (defun thumbs-find-thumb (img)
 344   "Display the thumbnail for IMG."
 345   (interactive "f")
 346   (find-file (thumbs-make-thumb img)))
 347
 348 (defun thumbs-insert-image (img type relief &optional marked)
 349   "Insert image IMG at point.
 350 TYPE and RELIEF will be used in constructing the image; see `image'
 351 in the emacs-lisp manual for further documentation.
 352 if MARKED is non-nil, the image is marked."
 353   (let ((i `(image :type ,type
 354                    :file ,img
 355                    :relief ,relief
 356                    :conversion ,(if marked 'disabled)
 357                    :margin ,thumbs-margin)))
 358     (insert-image i)
 359     (setq thumbs-current-image-size
 360           (image-size i t))))
 361
 362 (defun thumbs-insert-thumb (img &optional marked)
 363   "Insert the thumbnail for IMG at point.
 364 if MARKED is non-nil, the image is marked"
 365   (thumbs-insert-image
 366    (thumbs-make-thumb img) 'jpeg thumbs-relief marked)
 367   (put-text-property (1- (point)) (point)
 368                      'thumb-image-file img))
 369
 370 (defun thumbs-do-thumbs-insertion (L)
 371   "Insert all thumbs in list L."
 372   (let ((i 0))
 373     (dolist (img L)
 374       (thumbs-insert-thumb img
 375                            (member img thumbs-markedL))
 376       (when (= 0 (mod (setq i (1+ i)) thumbs-per-line))
 377         (newline)))
 378     (unless (bobp) (newline))))
 379
 380 (defun thumbs-show-thumbs-list (L &optional buffer-name same-window)
 381   (when (not (display-images-p))
 382     (error "Images are not supported in this Emacs session"))
 383   (funcall (if same-window 'switch-to-buffer 'pop-to-buffer)
 384            (or buffer-name "*THUMB-View*"))
 385   (let ((inhibit-read-only t))
 386     (erase-buffer)
 387     (thumbs-mode)
 388     (thumbs-do-thumbs-insertion L)
 389     (goto-char (point-min))
 390     (setq thumbs-current-dir default-directory)
 391     (make-variable-buffer-local 'thumbs-current-dir)))
 392
 393 ;;;###autoload
 394 (defun thumbs-show-all-from-dir (dir &optional reg same-window)
 395   "Make a preview buffer for all images in DIR.
 396 Optional argument REG to select file matching a regexp,
 397 and SAME-WINDOW to show thumbs in the same window."
 398   (interactive "DDir: ")
 399   (thumbs-show-thumbs-list
 400    (directory-files dir t
 401                     (or reg (image-file-name-regexp)))
 402    (concat "*Thumbs: " dir) same-window))
 403
 404 ;;;###autoload
 405 (defun thumbs-dired-show-marked ()
 406   "In Dired, make a thumbs buffer with all marked files."
 407   (interactive)
 408   (thumbs-show-thumbs-list (dired-get-marked-files) nil t))
 409
 410 ;;;###autoload
 411 (defun thumbs-dired-show-all ()
 412   "In dired, make a thumbs buffer with all files in current directory."
 413   (interactive)
 414   (thumbs-show-all-from-dir default-directory nil t))
 415
 416 ;;;###autoload
 417 (defalias 'thumbs 'thumbs-show-all-from-dir)
 418
 419 (defun thumbs-find-image (img &optional num otherwin)
 420   (funcall
 421    (if otherwin 'switch-to-buffer-other-window 'switch-to-buffer)
 422    (concat "*Image: " (file-name-nondirectory img) " - "
 423            (number-to-string (or num 0)) "*"))
 424   (thumbs-view-image-mode)
 425   (let ((inhibit-read-only t))
 426     (setq thumbs-current-image-filename img
 427           thumbs-current-tmp-filename nil
 428           thumbs-image-num (or num 0))
 429     (make-variable-buffer-local 'thumbs-current-image-filename)
 430     (make-variable-buffer-local 'thumbs-current-tmp-filename)
 431     (make-variable-buffer-local 'thumbs-current-image-size)
 432     (make-variable-buffer-local 'thumbs-image-num)
 433     (delete-region (point-min)(point-max))
 434     (thumbs-insert-image img (thumbs-image-type img) 0)))
 435
 436 (defun thumbs-find-image-at-point (&optional img otherwin)
 437   "Display image IMG for thumbnail at point.
 438 use another window it OTHERWIN is t."
 439   (interactive)
 440   (let* ((i (or img (thumbs-current-image))))
 441     (thumbs-find-image i (point) otherwin)))
 442
 443 (defun thumbs-find-image-at-point-other-window ()
 444   "Display image for thumbnail at point in the preview buffer.
 445 Open another window."
 446   (interactive)
 447   (thumbs-find-image-at-point nil t))
 448
 449 (defun thumbs-mouse-find-image (event)
 450   "Display image for thumbnail at mouse click EVENT."
 451   (interactive "e")
 452   (mouse-set-point event)
 453   (thumbs-find-image-at-point))
 454
 455 (defun thumbs-call-setroot-command (img)
 456   "Call the setroot program for IMG."
 457   (run-hooks 'thumbs-before-setroot-hook)
 458   (shell-command (replace-regexp-in-string
 459                   "\\*"
 460                   (shell-quote-argument (expand-file-name img))
 461                   thumbs-setroot-command nil t))
 462   (run-hooks 'thumbs-after-setroot-hook))
 463
 464 (defun thumbs-set-image-at-point-to-root-window ()
 465   "Set the image at point as the desktop wallpaper."
 466   (interactive)
 467   (thumbs-call-setroot-command
 468    (thumbs-current-image)))
 469
 470 (defun thumbs-set-root ()
 471   "Set the current image as root."
 472   (interactive)
 473   (thumbs-call-setroot-command
 474    (or thumbs-current-tmp-filename
 475        thumbs-current-image-filename)))
 476
 477 (defun thumbs-file-alist ()
 478   "Make an alist of elements (POS . FILENAME) for all images in thumb buffer."
 479   (save-excursion
 480     (let (list)
 481       (goto-char (point-min))
 482       (while (not (eobp))
 483         (if (thumbs-current-image)
 484             (push (cons (point-marker)
 485                         (thumbs-current-image))
 486                   list))
 487         (forward-char 1))
 488       list)))
 489
 490 (defun thumbs-file-list ()
 491   "Make a list of file names for all images in thumb buffer."
 492   (save-excursion
 493     (let (list)
 494       (goto-char (point-min))
 495       (while (not (eobp))
 496         (if (thumbs-current-image)
 497             (push (thumbs-current-image) list))
 498         (forward-char 1))
 499       (nreverse list))))
 500
 501 (defun thumbs-delete-images ()
 502   "Delete the image at point (and it's thumbnail) (or marked files if any)."
 503   (interactive)
 504   (let ((files (or thumbs-markedL (list (thumbs-current-image)))))
 505     (if (yes-or-no-p (format "Really delete %d files? " (length files)))
 506         (let ((thumbs-fileL (thumbs-file-alist))
 507               (inhibit-read-only t))
 508           (dolist (x files)
 509             (let (failure)
 510               (condition-case ()
 511                   (progn
 512                     (delete-file x)
 513                     (delete-file (thumbs-thumbname x)))
 514                 (file-error (setq failure t)))
 515               (unless failure
 516                 (when (rassoc x thumbs-fileL)
 517                   (goto-char (car (rassoc x thumbs-fileL)))
 518                   (delete-region (point) (1+ (point))))
 519                 (setq thumbs-markedL
 520                       (delq x thumbs-markedL)))))))))
 521
 522 (defun thumbs-rename-images (newfile)
 523   "Rename the image at point (and it's thumbnail) (or marked files if any)."
 524   (interactive "FRename to file or directory: ")
 525   (let ((files (or thumbs-markedL (list (thumbs-current-image))))
 526         failures)
 527     (if (and (not (file-directory-p newfile))
 528              thumbs-markedL)
 529         (if (file-exists-p newfile)
 530             (error "Renaming marked files to file name `%s'" newfile)
 531           (make-directory newfile t)))
 532     (if (yes-or-no-p (format "Really rename %d files? " (length files)))
 533         (let ((thumbs-fileL (thumbs-file-alist))
 534               (inhibit-read-only t))
 535           (dolist (file files)
 536             (let (failure)
 537               (condition-case ()
 538                   (if (file-directory-p newfile)
 539                       (rename-file file
 540                                    (expand-file-name
 541                                     (file-name-nondirectory file)
 542                                     newfile))
 543                     (rename-file file newfile))
 544                 (file-error (setq failure t)
 545                             (push file failures)))
 546               (unless failure
 547                 (when (rassoc file thumbs-fileL)
 548                   (goto-char (car (rassoc file thumbs-fileL)))
 549                   (delete-region (point) (1+ (point))))
 550                 (setq thumbs-markedL
 551                       (delq file thumbs-markedL)))))))
 552     (if failures
 553         (display-warning 'file-error
 554                          (format "Rename failures for %s into %s"
 555                                  failures newfile)
 556                          :error))))
 557
 558 (defun thumbs-kill-buffer ()
 559   "Kill the current buffer."
 560   (interactive)
 561   (let ((buffer (current-buffer)))
 562     (condition-case nil
 563         (delete-window (selected-window))
 564       (error nil))
 565     (kill-buffer buffer)))
 566
 567 (defun thumbs-show-image-num (num)
 568   "Show the image with number NUM."
 569   (let ((image-buffer (get-buffer-create "*Image*")))
 570     (let ((i (thumbs-current-image)))
 571       (with-current-buffer image-buffer
 572         (thumbs-insert-image i (thumbs-image-type i) 0))
 573       (setq thumbs-image-num num
 574             thumbs-current-image-filename i))))
 575
 576 (defun thumbs-next-image ()
 577   "Show next image."
 578   (interactive)
 579   (let* ((i (1+ thumbs-image-num))
 580          (list (thumbs-file-alist))
 581          (l (caar list)))
 582     (while (and (/= i thumbs-image-num) (not (assoc i list)))
 583       (setq i (if (>= i l) 1 (1+ i))))
 584     (thumbs-show-image-num i)))
 585
 586 (defun thumbs-previous-image ()
 587   "Show the previous image."
 588   (interactive)
 589   (let* ((i (- thumbs-image-num 1))
 590          (list (thumbs-file-alist))
 591          (l (caar list)))
 592     (while (and (/= i thumbs-image-num) (not (assoc i list)))
 593       (setq i (if (<= i 1) l (1- i))))
 594     (thumbs-show-image-num i)))
 595
 596 (defun thumbs-redraw-buffer ()
 597   "Redraw the current thumbs buffer."
 598   (let ((p (point))
 599         (inhibit-read-only t)
 600         (files (thumbs-file-list)))
 601     (erase-buffer)
 602     (thumbs-do-thumbs-insertion files)
 603     (goto-char p)))
 604
 605 (defun thumbs-mark ()
 606   "Mark the image at point."
 607   (interactive)
 608   (let ((elt (thumbs-current-image)))
 609     (unless elt
 610       (error "No image here"))
 611     (push elt thumbs-markedL)
 612     (let ((inhibit-read-only t))
 613       (delete-char 1)
 614       (thumbs-insert-thumb elt t)))
 615   (when (eolp) (forward-char)))
 616
 617 (defun thumbs-unmark ()
 618   "Unmark the image at point."
 619   (interactive)
 620   (let ((elt (thumbs-current-image)))
 621     (unless elt
 622       (error "No image here"))
 623     (setq thumbs-markedL (delete elt thumbs-markedL))
 624     (let ((inhibit-read-only t))
 625       (delete-char 1)
 626       (thumbs-insert-thumb elt nil)))
 627   (when (eolp) (forward-char)))
 628
 629 ;; Image modification routines
 630
 631 (defun thumbs-modify-image (action &optional arg)
 632   "Call convert to do ACTION on image with argument ARG.
 633 ACTION and ARG should be legal convert command."
 634   (interactive "sAction: \nsValue: ")
 635   ;; cleaning of old temp file
 636   (mapc 'delete-file
 637         (directory-files
 638          thumbs-temp-dir
 639          t
 640          thumbs-temp-prefix))
 641   (let ((buffer-read-only nil)
 642         (tmp (format "%s%s.jpg" thumbs-temp-file (thumbs-gensym))))
 643     (erase-buffer)
 644     (thumbs-call-convert thumbs-current-image-filename
 645                          tmp
 646                          action
 647                          (or arg ""))
 648     (thumbs-insert-image tmp 'jpeg 0)
 649     (setq thumbs-current-tmp-filename tmp)))
 650
 651 (defun thumbs-emboss-image (emboss)
 652   "Emboss the image with value EMBOSS."
 653   (interactive "nEmboss value: ")
 654   (if (or (< emboss 3) (> emboss 31) (zerop (% emboss 2)))
 655       (error "Arg must be an odd number between 3 and 31"))
 656   (thumbs-modify-image "emboss" (number-to-string emboss)))
 657
 658 (defun thumbs-monochrome-image ()
 659   "Turn the image to monochrome."
 660   (interactive)
 661   (thumbs-modify-image "monochrome"))
 662
 663 (defun thumbs-negate-image ()
 664   "Negate the image."
 665   (interactive)
 666   (thumbs-modify-image "negate"))
 667
 668 (defun thumbs-rotate-left ()
 669   "Rotate the image 90 degrees counter-clockwise."
 670   (interactive)
 671   (thumbs-modify-image "rotate" "270"))
 672
 673 (defun thumbs-rotate-right ()
 674   "Rotate the image 90 degrees clockwise."
 675   (interactive)
 676   (thumbs-modify-image "rotate" "90"))
 677
 678 (defun thumbs-current-image ()
 679   "Return the name of the image file name at point."
 680   (get-text-property (point) 'thumb-image-file))
 681
 682 (defun thumbs-forward-char ()
 683   "Move forward one image."
 684   (interactive)
 685   (forward-char)
 686   (while (and (not (eobp)) (not (thumbs-current-image)))
 687     (forward-char))
 688   (thumbs-show-name))
 689
 690 (defun thumbs-backward-char ()
 691   "Move backward one image."
 692   (interactive)
 693   (forward-char -1)
 694   (while (and (not (bobp)) (not (thumbs-current-image)))
 695     (forward-char -1))
 696   (thumbs-show-name))
 697
 698 (defun thumbs-forward-line ()
 699   "Move down one line."
 700   (interactive)
 701   (forward-line 1)
 702   (thumbs-show-name))
 703
 704 (defun thumbs-backward-line ()
 705   "Move up one line."
 706   (interactive)
 707   (forward-line -1)
 708   (thumbs-show-name))
 709
 710 (defun thumbs-show-name ()
 711   "Show the name of the current file."
 712   (interactive)
 713   (let ((f (thumbs-current-image)))
 714     (and f (message "%s [%s]" f (thumbs-file-size f)))))
 715
 716 (defun thumbs-save-current-image ()
 717   "Save the current image."
 718   (interactive)
 719   (let ((f (or thumbs-current-tmp-filename
 720                thumbs-current-image-filename))
 721         (sa (read-from-minibuffer "Save image file as: "
 722                                   thumbs-current-image-filename)))
 723     (copy-file f sa)))
 724
 725 (defun thumbs-dired ()
 726   "Use `dired' on the current thumbs directory."
 727   (interactive)
 728   (dired thumbs-current-dir))
 729
 730 ;; thumbs-mode
 731
 732 (defvar thumbs-mode-map
 733   (let ((map (make-sparse-keymap)))
 734     (define-key map [return] 'thumbs-find-image-at-point)
 735     (define-key map [mouse-2] 'thumbs-mouse-find-image)
 736     (define-key map [(meta return)] 'thumbs-find-image-at-point-other-window)
 737     (define-key map [(control return)] 'thumbs-set-image-at-point-to-root-window)
 738     (define-key map [delete] 'thumbs-delete-images)
 739     (define-key map [right] 'thumbs-forward-char)
 740     (define-key map [left] 'thumbs-backward-char)
 741     (define-key map [up] 'thumbs-backward-line)
 742     (define-key map [down] 'thumbs-forward-line)
 743     (define-key map "d" 'thumbs-dired)
 744     (define-key map "m" 'thumbs-mark)
 745     (define-key map "u" 'thumbs-unmark)
 746     (define-key map "R" 'thumbs-rename-images)
 747     (define-key map "x" 'thumbs-delete-images)
 748     (define-key map "s" 'thumbs-show-name)
 749     (define-key map "q" 'thumbs-kill-buffer)
 750     map)
 751   "Keymap for `thumbs-mode'.")
 752
 753 (put 'thumbs-mode 'mode-class 'special)
 754 (define-derived-mode thumbs-mode
 755   fundamental-mode "thumbs"
 756   "Preview images in a thumbnails buffer"
 757   (make-variable-buffer-local 'thumbs-markedL)
 758   (setq buffer-read-only t)
 759   (setq thumbs-markedL nil))
 760
 761 (defvar thumbs-view-image-mode-map
 762   (let ((map (make-sparse-keymap)))
 763     (define-key map [prior] 'thumbs-previous-image)
 764     (define-key map [next] 'thumbs-next-image)
 765     (define-key map "-" 'thumbs-resize-image-size-down)
 766     (define-key map "+" 'thumbs-resize-image-size-up)
 767     (define-key map "<" 'thumbs-rotate-left)
 768     (define-key map ">" 'thumbs-rotate-right)
 769     (define-key map "e" 'thumbs-emboss-image)
 770     (define-key map "r" 'thumbs-resize-interactive)
 771     (define-key map "s" 'thumbs-save-current-image)
 772     (define-key map "q" 'thumbs-kill-buffer)
 773     (define-key map "w" 'thumbs-set-root)
 774     map)
 775   "Keymap for `thumbs-view-image-mode'.")
 776
 777 ;; thumbs-view-image-mode
 778 (put 'thumbs-view-image-mode 'mode-class 'special)
 779 (define-derived-mode thumbs-view-image-mode
 780   fundamental-mode "image-view-mode"
 781   (setq buffer-read-only t))
 782
 783 ;;;###autoload
 784 (defun thumbs-dired-setroot ()
 785   "In dired, Call the setroot program on the image at point."
 786   (interactive)
 787   (thumbs-call-setroot-command (dired-get-filename)))
 788
 789 ;; Modif to dired mode map
 790 (define-key dired-mode-map "\C-ta" 'thumbs-dired-show-all)
 791 (define-key dired-mode-map "\C-tm" 'thumbs-dired-show-marked)
 792 (define-key dired-mode-map "\C-tw" 'thumbs-dired-setroot)
 793
 794 (provide 'thumbs)
 795
 796 ;;; thumbs.el ends here
 797
 798
 799 ;;; arch-tag: f9ac1ef8-83fc-42c0-8069-1fae43fd2e5c