mime-view.el

   1 ;;; mime-view.el --- interactive MIME viewer for GNU Emacs
   2
   3 ;; Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
   4
   5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
   6 ;; Created: 1994/07/13
   7 ;;      Renamed: 1994/08/31 from tm-body.el
   8 ;;      Renamed: 1997/02/19 from tm-view.el
   9 ;; Keywords: MIME, multimedia, mail, news
  10
  11 ;; This file is part of SEMI (Sophisticated Emacs MIME Interfaces).
  12
  13 ;; This program is free software; you can redistribute it and/or
  14 ;; modify it under the terms of the GNU General Public License as
  15 ;; published by the Free Software Foundation; either version 2, or (at
  16 ;; your option) any later version.
  17
  18 ;; This program is distributed in the hope that it will be useful, but
  19 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21 ;; General Public License for more details.
  22
  23 ;; You should have received a copy of the GNU General Public License
  24 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  25 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  26 ;; Boston, MA 02111-1307, USA.
  27
  28 ;;; Code:
  29
  30 (require 'std11)
  31 (require 'mel)
  32 (require 'eword-decode)
  33 (require 'mime-parse)
  34 (require 'semi-def)
  35 (require 'calist)
  36 (require 'alist)
  37 (require 'mailcap)
  38
  39
  40 ;;; @ version
  41 ;;;
  42
  43 (defconst mime-view-version-string
  44   `,(concat (car mime-module-version) " MIME-View "
  45             (mapconcat #'number-to-string (cddr mime-module-version) ".")
  46             " (" (cadr mime-module-version) ")"))
  47
  48
  49 ;;; @ variables
  50 ;;;
  51
  52 (defgroup mime-view nil
  53   "MIME view mode"
  54   :group 'mime)
  55
  56 (defcustom mime-view-find-every-acting-situation t
  57   "*Find every available acting-situation if non-nil."
  58   :group 'mime-view
  59   :type 'boolean)
  60
  61 (defcustom mime-acting-situation-examples-file "~/.mime-example"
  62   "*File name of example about acting-situation demonstrated by user."
  63   :group 'mime-view
  64   :type 'file)
  65
  66
  67 ;;; @ in raw-buffer (representation space)
  68 ;;;
  69
  70 (defvar mime-raw-message-info nil
  71   "Information about structure of message.
  72 Please use reference function `mime-entity-SLOT' to get value of SLOT.
  73
  74 Following is a list of slots of the structure:
  75
  76 buffer                  buffer includes this entity (buffer).
  77 node-id                 node-id (list of integers)
  78 header-start            minimum point of header in raw-buffer
  79 header-end              maximum point of header in raw-buffer
  80 body-start              minimum point of body in raw-buffer
  81 body-end                maximum point of body in raw-buffer
  82 content-type            content-type (content-type)
  83 content-disposition     content-disposition (content-disposition)
  84 encoding                Content-Transfer-Encoding (string or nil)
  85 children                entities included in this entity (list of entity)
  86
  87 If an entity includes other entities in its body, such as multipart or
  88 message/rfc822, `mime-entity' structures of them are included in
  89 `children', so the `mime-entity' structure become a tree.")
  90 (make-variable-buffer-local 'mime-raw-message-info)
  91
  92
  93 (defvar mime-preview-buffer nil
  94   "MIME-preview buffer corresponding with the (raw) buffer.")
  95 (make-variable-buffer-local 'mime-preview-buffer)
  96
  97
  98 (defvar mime-raw-representation-type nil
  99   "Representation-type of mime-raw-buffer.
 100 It must be nil, `binary' or `cooked'.
 101 If it is nil, `mime-raw-representation-type-alist' is used as default
 102 value.
 103 Notice that this variable is usually used as buffer local variable in
 104 raw-buffer.")
 105
 106 (make-variable-buffer-local 'mime-raw-representation-type)
 107
 108 (defvar mime-raw-representation-type-alist
 109   '((mime-show-message-mode     . binary)
 110     (mime-temp-message-mode     . binary)
 111     (t                          . cooked)
 112     )
 113   "Alist of major-mode vs. representation-type of mime-raw-buffer.
 114 Each element looks like (SYMBOL . REPRESENTATION-TYPE).  SYMBOL is
 115 major-mode or t.  t means default.  REPRESENTATION-TYPE must be
 116 `binary' or `cooked'.
 117 This value is overridden by buffer local variable
 118 `mime-raw-representation-type' if it is not nil.")
 119
 120
 121 (defsubst mime-raw-find-entity-from-node-id (entity-node-id
 122                                              &optional message-info)
 123   "Return entity from ENTITY-NODE-ID in mime-raw-buffer.
 124 If optional argument MESSAGE-INFO is not specified,
 125 `mime-raw-message-info' is used."
 126   (mime-raw-find-entity-from-number (reverse entity-node-id) message-info))
 127
 128 (defun mime-raw-find-entity-from-number (entity-number &optional message-info)
 129   "Return entity from ENTITY-NUMBER in mime-raw-buffer.
 130 If optional argument MESSAGE-INFO is not specified,
 131 `mime-raw-message-info' is used."
 132   (or message-info
 133       (setq message-info mime-raw-message-info))
 134   (if (eq entity-number t)
 135       message-info
 136     (let ((sn (car entity-number)))
 137       (if (null sn)
 138           message-info
 139         (let ((rc (nth sn (mime-entity-children message-info))))
 140           (if rc
 141               (mime-raw-find-entity-from-number (cdr entity-number) rc)
 142             ))
 143         ))))
 144
 145 (defun mime-raw-find-entity-from-point (point &optional message-info)
 146   "Return entity from POINT in mime-raw-buffer.
 147 If optional argument MESSAGE-INFO is not specified,
 148 `mime-raw-message-info' is used."
 149   (or message-info
 150       (setq message-info mime-raw-message-info))
 151   (if (and (<= (mime-entity-point-min message-info) point)
 152            (<= point (mime-entity-point-max message-info)))
 153       (let ((children (mime-entity-children message-info)))
 154         (catch 'tag
 155           (while children
 156             (let ((ret
 157                    (mime-raw-find-entity-from-point point (car children))))
 158               (if ret
 159                   (throw 'tag ret)
 160                 ))
 161             (setq children (cdr children)))
 162           message-info))))
 163
 164
 165 ;;; @ in preview-buffer (presentation space)
 166 ;;;
 167
 168 (defvar mime-mother-buffer nil
 169   "Mother buffer corresponding with the (MIME-preview) buffer.
 170 If current MIME-preview buffer is generated by other buffer, such as
 171 message/partial, it is called `mother-buffer'.")
 172 (make-variable-buffer-local 'mime-mother-buffer)
 173
 174 (defvar mime-raw-buffer nil
 175   "Raw buffer corresponding with the (MIME-preview) buffer.")
 176 (make-variable-buffer-local 'mime-raw-buffer)
 177
 178 (defvar mime-preview-original-window-configuration nil
 179   "Window-configuration before mime-view-mode is called.")
 180 (make-variable-buffer-local 'mime-preview-original-window-configuration)
 181
 182 (defun mime-preview-original-major-mode (&optional recursive)
 183   "Return major-mode of original buffer.
 184 If optional argument RECURSIVE is non-nil and current buffer has
 185 mime-mother-buffer, it returns original major-mode of the
 186 mother-buffer."
 187   (if (and recursive mime-mother-buffer)
 188       (save-excursion
 189         (set-buffer mime-mother-buffer)
 190         (mime-preview-original-major-mode recursive)
 191         )
 192     (save-excursion
 193       (set-buffer
 194        (mime-entity-buffer
 195         (get-text-property (point-min) 'mime-view-entity)))
 196       major-mode)))
 197
 198
 199 ;;; @ entity information
 200 ;;;
 201
 202 (defsubst mime-entity-parent (entity &optional message-info)
 203   "Return mother entity of ENTITY.
 204 If optional argument MESSAGE-INFO is not specified,
 205 `mime-raw-message-info' in buffer of ENTITY is used."
 206   (mime-raw-find-entity-from-node-id
 207    (cdr (mime-entity-node-id entity))
 208    (or message-info
 209        (save-excursion
 210          (set-buffer (mime-entity-buffer entity))
 211          mime-raw-message-info))))
 212
 213 (defun mime-entity-situation (entity)
 214   "Return situation of ENTITY."
 215   (append (or (mime-entity-content-type entity)
 216               (make-mime-content-type 'text 'plain))
 217           (let ((d (mime-entity-content-disposition entity)))
 218             (cons (cons 'disposition-type
 219                         (mime-content-disposition-type d))
 220                   (mapcar (function
 221                            (lambda (param)
 222                              (let ((name (car param)))
 223                                (cons (cond ((string= name "filename")
 224                                             'filename)
 225                                            ((string= name "creation-date")
 226                                             'creation-date)
 227                                            ((string= name "modification-date")
 228                                             'modification-date)
 229                                            ((string= name "read-date")
 230                                             'read-date)
 231                                            ((string= name "size")
 232                                             'size)
 233                                            (t (cons 'disposition (car param))))
 234                                      (cdr param)))))
 235                           (mime-content-disposition-parameters d))
 236                   ))
 237           (list (cons 'encoding (mime-entity-encoding entity))
 238                 (cons 'major-mode
 239                       (save-excursion
 240                         (set-buffer (mime-entity-buffer entity))
 241                         major-mode)))
 242           ))
 243
 244
 245 (defvar mime-view-uuencode-encoding-name-list '("x-uue" "x-uuencode"))
 246
 247 (defun mime-raw-get-uu-filename ()
 248   (save-excursion
 249     (if (re-search-forward "^begin [0-9]+ " nil t)
 250         (if (looking-at ".+$")
 251             (buffer-substring (match-beginning 0)(match-end 0))
 252           ))))
 253
 254 (defun mime-raw-get-subject (entity)
 255   (or (std11-find-field-body '("Content-Description" "Subject"))
 256       (let ((ret (mime-entity-content-disposition entity)))
 257         (and ret
 258              (setq ret (mime-content-disposition-filename ret))
 259              (std11-strip-quoted-string ret)
 260              ))
 261       (let ((ret (mime-entity-content-type entity)))
 262         (and ret
 263              (setq ret
 264                    (cdr
 265                     (let ((param (mime-content-type-parameters ret)))
 266                       (or (assoc "name" param)
 267                           (assoc "x-name" param))
 268                       )))
 269              (std11-strip-quoted-string ret)
 270              ))
 271       (if (member (mime-entity-encoding entity)
 272                   mime-view-uuencode-encoding-name-list)
 273           (mime-raw-get-uu-filename))
 274       ""))
 275
 276
 277 (defsubst mime-raw-point-to-entity-node-id (point &optional message-info)
 278   "Return entity-node-id from POINT in mime-raw-buffer.
 279 If optional argument MESSAGE-INFO is not specified,
 280 `mime-raw-message-info' is used."
 281   (mime-entity-node-id (mime-raw-find-entity-from-point point message-info)))
 282
 283 (defsubst mime-raw-point-to-entity-number (point &optional message-info)
 284   "Return entity-number from POINT in mime-raw-buffer.
 285 If optional argument MESSAGE-INFO is not specified,
 286 `mime-raw-message-info' is used."
 287   (mime-entity-number (mime-raw-find-entity-from-point point message-info)))
 288
 289 (defun mime-raw-flatten-message-info (&optional message-info)
 290   "Return list of entity in mime-raw-buffer.
 291 If optional argument MESSAGE-INFO is not specified,
 292 `mime-raw-message-info' is used."
 293   (or message-info
 294       (setq message-info mime-raw-message-info))
 295   (let ((dest (list message-info))
 296         (rcl (mime-entity-children message-info)))
 297     (while rcl
 298       (setq dest (nconc dest (mime-raw-flatten-message-info (car rcl))))
 299       (setq rcl (cdr rcl)))
 300     dest))
 301
 302
 303 ;;; @ presentation of preview
 304 ;;;
 305
 306 ;;; @@ entity-button
 307 ;;;
 308
 309 ;;; @@@ predicate function
 310 ;;;
 311
 312 (defun mime-view-entity-button-visible-p (entity)
 313   "Return non-nil if header of ENTITY is visible.
 314 Please redefine this function if you want to change default setting."
 315   (let ((media-type (mime-entity-media-type entity))
 316         (media-subtype (mime-entity-media-subtype entity)))
 317     (or (not (eq media-type 'application))
 318         (and (not (eq media-subtype 'x-selection))
 319              (or (not (eq media-subtype 'octet-stream))
 320                  (let ((mother-entity (mime-entity-parent entity)))
 321                    (or (not (eq (mime-entity-media-type mother-entity)
 322                                 'multipart))
 323                        (not (eq (mime-entity-media-subtype mother-entity)
 324                                 'encrypted)))
 325                    )
 326                  )))))
 327
 328 ;;; @@@ entity button generator
 329 ;;;
 330
 331 (defun mime-view-insert-entity-button (entity subject)
 332   "Insert entity-button of ENTITY."
 333   (let ((entity-node-id (mime-entity-node-id entity))
 334         (params (mime-entity-parameters entity)))
 335     (mime-insert-button
 336      (let ((access-type (assoc "access-type" params))
 337            (num (or (cdr (assoc "x-part-number" params))
 338                     (if (consp entity-node-id)
 339                         (mapconcat (function
 340                                     (lambda (num)
 341                                       (format "%s" (1+ num))
 342                                       ))
 343                                    (reverse entity-node-id) ".")
 344                       "0"))
 345                 ))
 346        (cond (access-type
 347               (let ((server (assoc "server" params)))
 348                 (setq access-type (cdr access-type))
 349                 (if server
 350                     (format "%s %s ([%s] %s)"
 351                             num subject access-type (cdr server))
 352                 (let ((site (cdr (assoc "site" params)))
 353                       (dir (cdr (assoc "directory" params)))
 354                       )
 355                   (format "%s %s ([%s] %s:%s)"
 356                           num subject access-type site dir)
 357                   )))
 358             )
 359            (t
 360             (let ((media-type (mime-entity-media-type entity))
 361                   (media-subtype (mime-entity-media-subtype entity))
 362                   (charset (cdr (assoc "charset" params)))
 363                   (encoding (mime-entity-encoding entity)))
 364               (concat
 365                num " " subject
 366                (let ((rest
 367                       (format " <%s/%s%s%s>"
 368                               media-type media-subtype
 369                               (if charset
 370                                   (concat "; " charset)
 371                                 "")
 372                               (if encoding
 373                                   (concat " (" encoding ")")
 374                                 ""))))
 375                  (if (>= (+ (current-column)(length rest))(window-width))
 376                      "\n\t")
 377                  rest)))
 378             )))
 379      (function mime-preview-play-current-entity))
 380     ))
 381
 382
 383 ;;; @@ entity-header
 384 ;;;
 385
 386 ;;; @@@ entity header filter
 387 ;;;
 388
 389 (defvar mime-view-content-header-filter-alist nil)
 390
 391 (defun mime-view-default-content-header-filter ()
 392   (mime-view-cut-header)
 393   (eword-decode-header)
 394   )
 395
 396 ;;; @@@ entity field cutter
 397 ;;;
 398
 399 (defvar mime-view-ignored-field-list
 400   '(".*Received" ".*Path" ".*Id" "References"
 401     "Replied" "Errors-To"
 402     "Lines" "Sender" ".*Host" "Xref"
 403     "Content-Type" "Precedence"
 404     "Status" "X-VM-.*")
 405   "All fields that match this list will be hidden in MIME preview buffer.
 406 Each elements are regexp of field-name.")
 407
 408 (defvar mime-view-ignored-field-regexp
 409   (concat "^"
 410           (apply (function regexp-or) mime-view-ignored-field-list)
 411           ":"))
 412
 413 (defvar mime-view-visible-field-list '("Dnas.*" "Message-Id")
 414   "All fields that match this list will be displayed in MIME preview buffer.
 415 Each elements are regexp of field-name.")
 416
 417 (defun mime-view-cut-header ()
 418   (goto-char (point-min))
 419   (while (re-search-forward mime-view-ignored-field-regexp nil t)
 420     (let* ((beg (match-beginning 0))
 421            (end (match-end 0))
 422            (name (buffer-substring beg end))
 423            )
 424       (catch 'visible
 425         (let ((rest mime-view-visible-field-list))
 426           (while rest
 427             (if (string-match (car rest) name)
 428                 (throw 'visible nil)
 429               )
 430             (setq rest (cdr rest))))
 431         (delete-region beg
 432                        (save-excursion
 433                          (if (re-search-forward "^\\([^ \t]\\|$\\)" nil t)
 434                              (match-beginning 0)
 435                            (point-max))))
 436         ))))
 437
 438
 439 ;;; @@ entity-body
 440 ;;;
 441
 442 ;;; @@@ predicate function
 443 ;;;
 444
 445 (defun mime-calist::field-match-method-as-default-rule (calist
 446                                                         field-type field-value)
 447   (let ((s-field (assq field-type calist)))
 448     (cond ((null s-field)
 449            (cons (cons field-type field-value) calist)
 450            )
 451           (t calist))))
 452
 453 (define-calist-field-match-method
 454   'header #'mime-calist::field-match-method-as-default-rule)
 455
 456 (define-calist-field-match-method
 457   'body #'mime-calist::field-match-method-as-default-rule)
 458
 459
 460 (defvar mime-preview-condition nil
 461   "Condition-tree about how to display entity.")
 462
 463 (ctree-set-calist-strictly
 464  'mime-preview-condition '((type . application)(subtype . octet-stream)
 465                            (encoding . nil)
 466                            (body . visible)))
 467 (ctree-set-calist-strictly
 468  'mime-preview-condition '((type . application)(subtype . octet-stream)
 469                            (encoding . "7bit")
 470                            (body . visible)))
 471 (ctree-set-calist-strictly
 472  'mime-preview-condition '((type . application)(subtype . octet-stream)
 473                            (encoding . "8bit")
 474                            (body . visible)))
 475
 476 (ctree-set-calist-strictly
 477  'mime-preview-condition '((type . application)(subtype . pgp)
 478                            (body . visible)))
 479
 480 (ctree-set-calist-strictly
 481  'mime-preview-condition '((type . application)(subtype . x-latex)
 482                            (body . visible)))
 483
 484 (ctree-set-calist-strictly
 485  'mime-preview-condition '((type . application)(subtype . x-selection)
 486                            (body . visible)))
 487
 488 (ctree-set-calist-strictly
 489  'mime-preview-condition '((type . application)(subtype . x-comment)
 490                            (body . visible)))
 491
 492 (ctree-set-calist-strictly
 493  'mime-preview-condition '((type . message)(subtype . delivery-status)
 494                            (body . visible)))
 495
 496 (ctree-set-calist-strictly
 497  'mime-preview-condition
 498  '((body . visible)
 499    (body-presentation-method . mime-preview-text/plain)))
 500
 501 (ctree-set-calist-strictly
 502  'mime-preview-condition
 503  '((type . nil)
 504    (body . visible)
 505    (body-presentation-method . mime-preview-text/plain)))
 506
 507 (ctree-set-calist-strictly
 508  'mime-preview-condition
 509  '((type . text)(subtype . enriched)
 510    (body . visible)
 511    (body-presentation-method . mime-preview-text/enriched)))
 512
 513 (ctree-set-calist-strictly
 514  'mime-preview-condition
 515  '((type . text)(subtype . richtext)
 516    (body . visible)
 517    (body-presentation-method . mime-preview-text/richtext)))
 518
 519 (ctree-set-calist-strictly
 520  'mime-preview-condition
 521  '((type . text)(subtype . t)
 522    (body . visible)
 523    (body-presentation-method . mime-preview-text/plain)))
 524
 525 (ctree-set-calist-strictly
 526  'mime-preview-condition
 527  '((type . multipart)(subtype . alternative)
 528    (body . visible)
 529    (body-presentation-method . mime-preview-multipart/alternative)))
 530
 531 (ctree-set-calist-strictly
 532  'mime-preview-condition '((type . message)(subtype . partial)
 533                            (body-presentation-method
 534                             . mime-preview-message/partial-button)))
 535
 536 (ctree-set-calist-strictly
 537  'mime-preview-condition '((type . message)(subtype . rfc822)
 538                            (body-presentation-method . nil)
 539                            (childrens-situation (header . visible)
 540                                                 (entity-button . invisible))))
 541
 542 (ctree-set-calist-strictly
 543  'mime-preview-condition '((type . message)(subtype . news)
 544                            (body-presentation-method . nil)
 545                            (childrens-situation (header . visible)
 546                                                 (entity-button . invisible))))
 547
 548
 549 ;;; @@@ entity presentation
 550 ;;;
 551
 552 (autoload 'mime-preview-text/plain "mime-text")
 553 (autoload 'mime-preview-text/enriched "mime-text")
 554 (autoload 'mime-preview-text/richtext "mime-text")
 555
 556 (defvar mime-view-announcement-for-message/partial
 557   (if (and (>= emacs-major-version 19) window-system)
 558       "\
 559 \[[ This is message/partial style split message. ]]
 560 \[[ Please press `v' key in this buffer          ]]
 561 \[[ or click here by mouse button-2.             ]]"
 562     "\
 563 \[[ This is message/partial style split message. ]]
 564 \[[ Please press `v' key in this buffer.         ]]"
 565     ))
 566
 567 (defun mime-preview-message/partial-button (&optional entity situation)
 568   (save-restriction
 569     (goto-char (point-max))
 570     (if (not (search-backward "\n\n" nil t))
 571         (insert "\n")
 572       )
 573     (goto-char (point-max))
 574     (narrow-to-region (point-max)(point-max))
 575     (insert mime-view-announcement-for-message/partial)
 576     (mime-add-button (point-min)(point-max)
 577                      #'mime-preview-play-current-entity)
 578     ))
 579
 580 (defun mime-preview-multipart/mixed (entity situation)
 581   (let ((children (mime-entity-children entity))
 582         (default-situation
 583           (cdr (assq 'childrens-situation situation))))
 584     (while children
 585       (mime-view-display-entity (car children)
 586                                 (save-excursion
 587                                   (set-buffer (mime-entity-buffer entity))
 588                                   mime-raw-message-info)
 589                                 (current-buffer)
 590                                 default-situation)
 591       (setq children (cdr children))
 592       )))
 593
 594 (defcustom mime-view-type-subtype-score-alist
 595   '(((text . enriched) . 3)
 596     ((text . richtext) . 2)
 597     ((text . plain)    . 1)
 598     (t . 0))
 599   "Alist MEDIA-TYPE vs corresponding score.
 600 MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t.  t means default."
 601   :group 'mime-view
 602   :type '(repeat (cons (choice :tag "Media-Type"
 603                                (item :tag "Type/Subtype"
 604                                      (cons symbol symbol))
 605                                (item :tag "Type" symbol)
 606                                (item :tag "Default" t))
 607                        integer)))
 608
 609 (defun mime-preview-multipart/alternative (entity situation)
 610   (let* ((children (mime-entity-children entity))
 611          (default-situation
 612            (cdr (assq 'childrens-situation situation)))
 613          (i 0)
 614          (p 0)
 615          (max-score 0)
 616          (situations
 617           (mapcar (function
 618                    (lambda (child)
 619                      (let ((situation
 620                             (or (ctree-match-calist
 621                                  mime-preview-condition
 622                                  (append (mime-entity-situation child)
 623                                          default-situation))
 624                                 default-situation)))
 625                        (if (cdr (assq 'body-presentation-method situation))
 626                            (let ((score
 627                                   (cdr
 628                                    (or (assoc
 629                                         (cons
 630                                          (cdr (assq 'type situation))
 631                                          (cdr (assq 'subtype situation)))
 632                                         mime-view-type-subtype-score-alist)
 633                                        (assq
 634                                         (cdr (assq 'type situation))
 635                                         mime-view-type-subtype-score-alist)
 636                                        (assq
 637                                         t
 638                                         mime-view-type-subtype-score-alist)
 639                                        ))))
 640                              (if (> score max-score)
 641                                  (setq p i
 642                                        max-score score)
 643                                )))
 644                        (setq i (1+ i))
 645                        situation)
 646                      ))
 647                   children)))
 648     (setq i 0)
 649     (while children
 650       (let ((child (car children))
 651             (situation (car situations)))
 652         (mime-view-display-entity child
 653                                   (save-excursion
 654                                     (set-buffer (mime-entity-buffer child))
 655                                     mime-raw-message-info)
 656                                   (current-buffer)
 657                                   default-situation
 658                                   (if (= i p)
 659                                       situation
 660                                     (del-alist 'body-presentation-method
 661                                                (copy-alist situation))))
 662         )
 663       (setq children (cdr children)
 664             situations (cdr situations)
 665             i (1+ i))
 666       )))
 667
 668
 669 ;;; @ acting-condition
 670 ;;;
 671
 672 (defvar mime-acting-condition nil
 673   "Condition-tree about how to process entity.")
 674
 675 (if (file-readable-p mailcap-file)
 676     (let ((entries (mailcap-parse-file)))
 677       (while entries
 678         (let ((entry (car entries))
 679               view print shared)
 680           (while entry
 681             (let* ((field (car entry))
 682                    (field-type (car field)))
 683               (cond ((eq field-type 'view)  (setq view field))
 684                     ((eq field-type 'print) (setq print field))
 685                     ((memq field-type '(compose composetyped edit)))
 686                     (t (setq shared (cons field shared))))
 687               )
 688             (setq entry (cdr entry))
 689             )
 690           (setq shared (nreverse shared))
 691           (ctree-set-calist-with-default
 692            'mime-acting-condition
 693            (append shared (list '(mode . "play")(cons 'method (cdr view)))))
 694           (if print
 695               (ctree-set-calist-with-default
 696                'mime-acting-condition
 697                (append shared
 698                        (list '(mode . "print")(cons 'method (cdr view))))
 699                ))
 700           )
 701         (setq entries (cdr entries))
 702         )))
 703
 704 ;; (ctree-set-calist-strictly
 705 ;;  'mime-acting-condition
 706 ;;  '((type . t)(subtype . t)(mode . "extract")
 707 ;;    (method . mime-method-to-save)))
 708 (ctree-set-calist-with-default
 709  'mime-acting-condition
 710  '((mode . "extract")
 711    (method . mime-method-to-save)))
 712
 713 ;; (ctree-set-calist-strictly
 714 ;;  'mime-acting-condition
 715 ;;  '((type . text)(subtype . plain)(mode . "play")
 716 ;;    (method "tm-plain" nil 'file "" 'encoding 'mode 'name)
 717 ;;    ))
 718 ;; (ctree-set-calist-strictly
 719 ;;  'mime-acting-condition
 720 ;;  '((type . text)(subtype . plain)(mode . "print")
 721 ;;    (method "tm-plain" nil 'file "" 'encoding 'mode 'name)
 722 ;;    ))
 723 ;; (ctree-set-calist-strictly
 724 ;;  'mime-acting-condition
 725 ;;  '((type . text)(subtype . html)(mode . "play")
 726 ;;    (method "tm-html" nil 'file "" 'encoding 'mode 'name)
 727 ;;    ))
 728 (ctree-set-calist-strictly
 729  'mime-acting-condition
 730  '((type . text)(subtype . x-rot13-47)(mode . "play")
 731    (method . mime-method-to-display-caesar)
 732    ))
 733 (ctree-set-calist-strictly
 734  'mime-acting-condition
 735  '((type . text)(subtype . x-rot13-47-48)(mode . "play")
 736    (method . mime-method-to-display-caesar)
 737    ))
 738
 739 ;; (ctree-set-calist-strictly
 740 ;;  'mime-acting-condition
 741 ;;  '((type . audio)(subtype . basic)(mode . "play")
 742 ;;    (method "tm-au" nil 'file "" 'encoding 'mode 'name)
 743 ;;    ))
 744
 745 ;; (ctree-set-calist-strictly
 746 ;;  'mime-acting-condition
 747 ;;  '((type . image)(mode . "play")
 748 ;;    (method "tm-image" nil 'file "" 'encoding 'mode 'name)
 749 ;;    ))
 750 ;; (ctree-set-calist-strictly
 751 ;;  'mime-acting-condition
 752 ;;  '((type . image)(mode . "print")
 753 ;;    (method "tm-image" nil 'file "" 'encoding 'mode 'name)
 754 ;;    ))
 755
 756 ;; (ctree-set-calist-strictly
 757 ;;  'mime-acting-condition
 758 ;;  '((type . video)(subtype . mpeg)(mode . "play")
 759 ;;    (method "tm-mpeg" nil 'file "" 'encoding 'mode 'name)
 760 ;;    ))
 761
 762 ;; (ctree-set-calist-strictly
 763 ;;  'mime-acting-condition
 764 ;;  '((type . application)(subtype . postscript)(mode . "play")
 765 ;;    (method "tm-ps" nil 'file "" 'encoding 'mode 'name)
 766 ;;    ))
 767 ;; (ctree-set-calist-strictly
 768 ;;  'mime-acting-condition
 769 ;;  '((type . application)(subtype . postscript)(mode . "print")
 770 ;;    (method "tm-ps" nil 'file "" 'encoding 'mode 'name)
 771 ;;    ))
 772
 773 (ctree-set-calist-strictly
 774  'mime-acting-condition
 775  '((type . message)(subtype . rfc822)(mode . "play")
 776    (method . mime-method-to-display-message/rfc822)
 777    ))
 778 (ctree-set-calist-strictly
 779  'mime-acting-condition
 780  '((type . message)(subtype . partial)(mode . "play")
 781    (method . mime-method-to-store-message/partial)
 782    ))
 783
 784 (ctree-set-calist-strictly
 785  'mime-acting-condition
 786  '((type . message)(subtype . external-body)
 787    ("access-type" . "anon-ftp")
 788    (method . mime-method-to-display-message/external-ftp)
 789    ))
 790
 791 (ctree-set-calist-strictly
 792  'mime-acting-condition
 793  '((type . application)(subtype . octet-stream)
 794    (method . mime-method-to-save)
 795    ))
 796
 797
 798 ;;; @ quitting method
 799 ;;;
 800
 801 (defvar mime-preview-quitting-method-alist
 802   '((mime-show-message-mode
 803      . mime-preview-quitting-method-for-mime-show-message-mode))
 804   "Alist of major-mode vs. quitting-method of mime-view.")
 805
 806 (defvar mime-view-over-to-previous-method-alist nil)
 807 (defvar mime-view-over-to-next-method-alist nil)
 808
 809
 810 ;;; @ following method
 811 ;;;
 812
 813 (defvar mime-view-following-method-alist nil
 814   "Alist of major-mode vs. following-method of mime-view.")
 815
 816 (defvar mime-view-following-required-fields-list
 817   '("From"))
 818
 819
 820 ;;; @ X-Face
 821 ;;;
 822
 823 ;; hack from Gnus 5.0.4.
 824
 825 (defvar mime-view-x-face-to-pbm-command
 826   "{ echo '/* Width=48, Height=48 */'; uncompface; } | icontopbm")
 827
 828 (defvar mime-view-x-face-command
 829   (concat mime-view-x-face-to-pbm-command
 830           " | xv -quit -")
 831   "String to be executed to display an X-Face field.
 832 The command will be executed in a sub-shell asynchronously.
 833 The compressed face will be piped to this command.")
 834
 835 (defun mime-view-x-face-function ()
 836   "Function to display X-Face field. You can redefine to customize."
 837   ;; 1995/10/12 (c.f. tm-eng:130)
 838   ;;    fixed by Eric Ding <ericding@San-Jose.ate.slb.com>
 839   (save-restriction
 840     (narrow-to-region (point-min) (re-search-forward "^$" nil t))
 841     ;; end
 842     (goto-char (point-min))
 843     (if (re-search-forward "^X-Face:[ \t]*" nil t)
 844         (let ((beg (match-end 0))
 845               (end (std11-field-end))
 846               )
 847           (call-process-region beg end "sh" nil 0 nil
 848                                "-c" mime-view-x-face-command)
 849           ))))
 850
 851
 852 ;;; @ buffer setup
 853 ;;;
 854
 855 (defun mime-view-display-entity (entity message-info obuf
 856                                         default-situation
 857                                         &optional situation)
 858   (let* ((raw-buffer (mime-entity-buffer entity))
 859          (start (mime-entity-point-min entity))
 860          (end (mime-entity-point-max entity))
 861          original-major-mode end-of-header e nb ne subj)
 862     (set-buffer raw-buffer)
 863     (setq original-major-mode major-mode)
 864     (goto-char start)
 865     (setq end-of-header (if (re-search-forward "^$" nil t)
 866                             (1+ (match-end 0))
 867                           end))
 868     (if (> end-of-header end)
 869         (setq end-of-header end)
 870       )
 871     (save-restriction
 872       (narrow-to-region start end)
 873       (setq subj (eword-decode-string (mime-raw-get-subject entity)))
 874       )
 875     (or situation
 876         (setq situation
 877               (or (ctree-match-calist mime-preview-condition
 878                                       (append (mime-entity-situation entity)
 879                                               default-situation))
 880                   default-situation)))
 881     (let ((button-is-invisible
 882            (eq (cdr (assq 'entity-button situation)) 'invisible))
 883           (header-is-visible
 884            (eq (cdr (assq 'header situation)) 'visible))
 885           (body-presentation-method
 886            (cdr (assq 'body-presentation-method situation)))
 887           (children (mime-entity-children entity)))
 888       (set-buffer obuf)
 889       (setq nb (point))
 890       (narrow-to-region nb nb)
 891       (or button-is-invisible
 892           (if (mime-view-entity-button-visible-p entity)
 893               (mime-view-insert-entity-button entity subj)
 894             ))
 895       (if header-is-visible
 896           (save-restriction
 897             (narrow-to-region (point)(point))
 898             (insert-buffer-substring raw-buffer start end-of-header)
 899             (let ((f (cdr (assq original-major-mode
 900                                 mime-view-content-header-filter-alist))))
 901               (if (functionp f)
 902                   (funcall f)
 903                 (mime-view-default-content-header-filter)
 904                 ))
 905             (run-hooks 'mime-view-content-header-filter-hook)
 906             ))
 907       (cond ((eq body-presentation-method 'with-filter)
 908              (let ((body-filter (cdr (assq 'body-filter situation))))
 909                (save-restriction
 910                  (narrow-to-region (point-max)(point-max))
 911                  (insert-buffer-substring raw-buffer end-of-header end)
 912                  (funcall body-filter situation)
 913                  )))
 914             (children)
 915             ((functionp body-presentation-method)
 916              (funcall body-presentation-method entity situation)
 917              )
 918             (t
 919              (when button-is-invisible
 920                (goto-char (point-max))
 921                (mime-view-insert-entity-button entity subj)
 922                )
 923              (or header-is-visible
 924                  (progn
 925                    (goto-char (point-max))
 926                    (insert "\n")
 927                    ))
 928              ))
 929       (setq ne (point-max))
 930       (widen)
 931       (put-text-property nb ne 'mime-view-entity entity)
 932       (goto-char ne)
 933       (if children
 934           (if (functionp body-presentation-method)
 935               (funcall body-presentation-method entity situation)
 936             (mime-preview-multipart/mixed entity situation)
 937             ))
 938       )))
 939
 940
 941 ;;; @ MIME viewer mode
 942 ;;;
 943
 944 (defconst mime-view-menu-title "MIME-View")
 945 (defconst mime-view-menu-list
 946   '((up          "Move to upper entity"    mime-preview-move-to-upper)
 947     (previous    "Move to previous entity" mime-preview-move-to-previous)
 948     (next        "Move to next entity"     mime-preview-move-to-next)
 949     (scroll-down "Scroll-down"             mime-preview-scroll-down-entity)
 950     (scroll-up   "Scroll-up"               mime-preview-scroll-up-entity)
 951     (play        "Play current entity"     mime-preview-play-current-entity)
 952     (extract     "Extract current entity"  mime-preview-extract-current-entity)
 953     (print       "Print current entity"    mime-preview-print-current-entity)
 954     (x-face      "Show X Face"             mime-preview-display-x-face)
 955     )
 956   "Menu for MIME Viewer")
 957
 958 (cond (running-xemacs
 959        (defvar mime-view-xemacs-popup-menu
 960          (cons mime-view-menu-title
 961                (mapcar (function
 962                         (lambda (item)
 963                           (vector (nth 1 item)(nth 2 item) t)
 964                           ))
 965                        mime-view-menu-list)))
 966        (defun mime-view-xemacs-popup-menu (event)
 967          "Popup the menu in the MIME Viewer buffer"
 968          (interactive "e")
 969          (select-window (event-window event))
 970          (set-buffer (event-buffer event))
 971          (popup-menu 'mime-view-xemacs-popup-menu))
 972        (defvar mouse-button-2 'button2)
 973        )
 974       (t
 975        (defvar mouse-button-2 [mouse-2])
 976        ))
 977
 978 (defun mime-view-define-keymap (&optional default)
 979   (let ((mime-view-mode-map (if (keymapp default)
 980                                 (copy-keymap default)
 981                               (make-sparse-keymap)
 982                               )))
 983     (define-key mime-view-mode-map
 984       "u"        (function mime-preview-move-to-upper))
 985     (define-key mime-view-mode-map
 986       "p"        (function mime-preview-move-to-previous))
 987     (define-key mime-view-mode-map
 988       "n"        (function mime-preview-move-to-next))
 989     (define-key mime-view-mode-map
 990       "\e\t"     (function mime-preview-move-to-previous))
 991     (define-key mime-view-mode-map
 992       "\t"       (function mime-preview-move-to-next))
 993     (define-key mime-view-mode-map
 994       " "        (function mime-preview-scroll-up-entity))
 995     (define-key mime-view-mode-map
 996       "\M- "     (function mime-preview-scroll-down-entity))
 997     (define-key mime-view-mode-map
 998       "\177"     (function mime-preview-scroll-down-entity))
 999     (define-key mime-view-mode-map
1000       "\C-m"     (function mime-preview-next-line-entity))
1001     (define-key mime-view-mode-map
1002       "\C-\M-m"  (function mime-preview-previous-line-entity))
1003     (define-key mime-view-mode-map
1004       "v"        (function mime-preview-play-current-entity))
1005     (define-key mime-view-mode-map
1006       "e"        (function mime-preview-extract-current-entity))
1007     (define-key mime-view-mode-map
1008       "\C-c\C-p" (function mime-preview-print-current-entity))
1009     (define-key mime-view-mode-map
1010       "a"        (function mime-preview-follow-current-entity))
1011     (define-key mime-view-mode-map
1012       "q"        (function mime-preview-quit))
1013     (define-key mime-view-mode-map
1014       "\C-c\C-x" (function mime-preview-kill-buffer))
1015     ;; (define-key mime-view-mode-map
1016     ;;   "<"        (function beginning-of-buffer))
1017     ;; (define-key mime-view-mode-map
1018     ;;   ">"        (function end-of-buffer))
1019     (define-key mime-view-mode-map
1020       "?"        (function describe-mode))
1021     (define-key mime-view-mode-map
1022       [tab] (function mime-preview-move-to-next))
1023     (define-key mime-view-mode-map
1024       [delete] (function mime-preview-scroll-down-entity))
1025     (define-key mime-view-mode-map
1026       [backspace] (function mime-preview-scroll-down-entity))
1027     (if (functionp default)
1028         (cond (running-xemacs
1029                (set-keymap-default-binding mime-view-mode-map default)
1030                )
1031               (t
1032                (setq mime-view-mode-map
1033                      (append mime-view-mode-map (list (cons t default))))
1034                )))
1035     (if mouse-button-2
1036         (define-key mime-view-mode-map
1037           mouse-button-2 (function mime-button-dispatcher))
1038       )
1039     (cond (running-xemacs
1040            (define-key mime-view-mode-map
1041              mouse-button-3 (function mime-view-xemacs-popup-menu))
1042            )
1043           ((>= emacs-major-version 19)
1044            (define-key mime-view-mode-map [menu-bar mime-view]
1045              (cons mime-view-menu-title
1046                    (make-sparse-keymap mime-view-menu-title)))
1047            (mapcar (function
1048                     (lambda (item)
1049                       (define-key mime-view-mode-map
1050                         (vector 'menu-bar 'mime-view (car item))
1051                         (cons (nth 1 item)(nth 2 item))
1052                         )
1053                       ))
1054                    (reverse mime-view-menu-list)
1055                    )
1056            ))
1057     (use-local-map mime-view-mode-map)
1058     (run-hooks 'mime-view-define-keymap-hook)
1059     ))
1060
1061 (defsubst mime-maybe-hide-echo-buffer ()
1062   "Clear mime-echo buffer and delete window for it."
1063   (let ((buf (get-buffer mime-echo-buffer-name)))
1064     (if buf
1065         (save-excursion
1066           (set-buffer buf)
1067           (erase-buffer)
1068           (let ((win (get-buffer-window buf)))
1069             (if win
1070                 (delete-window win)
1071               ))
1072           (bury-buffer buf)
1073           ))))
1074
1075 (defvar mime-view-redisplay nil)
1076
1077 (defun mime-view-display-message (message &optional preview-buffer
1078                                           mother default-keymap-or-function)
1079   (mime-maybe-hide-echo-buffer)
1080   (let ((win-conf (current-window-configuration))
1081         (raw-buffer (mime-entity-buffer message)))
1082     (or preview-buffer
1083         (setq preview-buffer
1084               (concat "*Preview-" (buffer-name raw-buffer) "*")))
1085     (set-buffer raw-buffer)
1086     (setq mime-raw-message-info (mime-parse-message))
1087     (setq mime-preview-buffer preview-buffer)
1088     (let ((inhibit-read-only t))
1089       (switch-to-buffer preview-buffer)
1090       (widen)
1091       (erase-buffer)
1092       (setq mime-raw-buffer raw-buffer)
1093       (if mother
1094           (setq mime-mother-buffer mother)
1095         )
1096       (setq mime-preview-original-window-configuration win-conf)
1097       (setq major-mode 'mime-view-mode)
1098       (setq mode-name "MIME-View")
1099       (mime-view-display-entity message message
1100                                 preview-buffer
1101                                 '((entity-button . invisible)
1102                                   (header . visible)
1103                                   ))
1104       (mime-view-define-keymap default-keymap-or-function)
1105       (let ((point
1106              (next-single-property-change (point-min) 'mime-view-entity)))
1107         (if point
1108             (goto-char point)
1109           (goto-char (point-min))
1110           (search-forward "\n\n" nil t)
1111           ))
1112       (run-hooks 'mime-view-mode-hook)
1113       ))
1114   (set-buffer-modified-p nil)
1115   (setq buffer-read-only t)
1116   )
1117
1118 (defun mime-view-buffer (&optional raw-buffer preview-buffer mother
1119                                    default-keymap-or-function)
1120   (interactive)
1121   (mime-view-display-message
1122    (save-excursion
1123      (if raw-buffer (set-buffer raw-buffer))
1124      (mime-parse-message)
1125      )
1126    preview-buffer mother default-keymap-or-function))
1127
1128 (defun mime-view-mode (&optional mother ctl encoding
1129                                  raw-buffer preview-buffer
1130                                  default-keymap-or-function)
1131   "Major mode for viewing MIME message.
1132
1133 Here is a list of the standard keys for mime-view-mode.
1134
1135 key             feature
1136 ---             -------
1137
1138 u               Move to upper content
1139 p or M-TAB      Move to previous content
1140 n or TAB        Move to next content
1141 SPC             Scroll up or move to next content
1142 M-SPC or DEL    Scroll down or move to previous content
1143 RET             Move to next line
1144 M-RET           Move to previous line
1145 v               Decode current content as `play mode'
1146 e               Decode current content as `extract mode'
1147 C-c C-p         Decode current content as `print mode'
1148 a               Followup to current content.
1149 x               Display X-Face
1150 q               Quit
1151 button-2        Move to point under the mouse cursor
1152                 and decode current content as `play mode'
1153 "
1154   (interactive)
1155   (mime-view-display-message
1156    (save-excursion
1157      (if raw-buffer (set-buffer raw-buffer))
1158      (or mime-view-redisplay
1159          (mime-parse-message ctl encoding))
1160      )
1161    preview-buffer mother default-keymap-or-function))
1162
1163
1164 ;;; @@ playing
1165 ;;;
1166
1167 (autoload 'mime-preview-play-current-entity "mime-play"
1168   "Play current entity." t)
1169
1170 (defun mime-preview-extract-current-entity ()
1171   "Extract current entity into file (maybe).
1172 It decodes current entity to call internal or external method as
1173 \"extract\" mode.  The method is selected from variable
1174 `mime-acting-condition'."
1175   (interactive)
1176   (mime-preview-play-current-entity "extract")
1177   )
1178
1179 (defun mime-preview-print-current-entity ()
1180   "Print current entity (maybe).
1181 It decodes current entity to call internal or external method as
1182 \"print\" mode.  The method is selected from variable
1183 `mime-acting-condition'."
1184   (interactive)
1185   (mime-preview-play-current-entity "print")
1186   )
1187
1188
1189 ;;; @@ following
1190 ;;;
1191
1192 (defun mime-preview-follow-current-entity ()
1193   "Write follow message to current entity.
1194 It calls following-method selected from variable
1195 `mime-view-following-method-alist'."
1196   (interactive)
1197   (let (entity)
1198     (while (null (setq entity
1199                        (get-text-property (point) 'mime-view-entity)))
1200       (backward-char)
1201       )
1202     (let* ((p-beg
1203             (previous-single-property-change (point) 'mime-view-entity))
1204            p-end
1205            (entity-node-id (mime-entity-node-id entity))
1206            (len (length entity-node-id))
1207            )
1208       (cond ((null p-beg)
1209              (setq p-beg
1210                    (if (eq (next-single-property-change (point-min)
1211                                                         'mime-view-entity)
1212                            (point))
1213                        (point)
1214                      (point-min)))
1215              )
1216             ((eq (next-single-property-change p-beg 'mime-view-entity)
1217                  (point))
1218              (setq p-beg (point))
1219              ))
1220       (setq p-end (next-single-property-change p-beg 'mime-view-entity))
1221       (cond ((null p-end)
1222              (setq p-end (point-max))
1223              )
1224             ((null entity-node-id)
1225              (setq p-end (point-max))
1226              )
1227             (t
1228              (save-excursion
1229                (goto-char p-end)
1230                (catch 'tag
1231                  (let (e)
1232                    (while (setq e
1233                                 (next-single-property-change
1234                                  (point) 'mime-view-entity))
1235                      (goto-char e)
1236                      (let ((rc (mime-entity-node-id
1237                                 (get-text-property (point)
1238                                                    'mime-view-entity))))
1239                        (or (equal entity-node-id
1240                                   (nthcdr (- (length rc) len) rc))
1241                            (throw 'tag nil)
1242                            ))
1243                      (setq p-end e)
1244                      ))
1245                  (setq p-end (point-max))
1246                  ))
1247              ))
1248       (let* ((mode (mime-preview-original-major-mode 'recursive))
1249              (new-name
1250               (format "%s-%s" (buffer-name) (reverse entity-node-id)))
1251              new-buf
1252              (the-buf (current-buffer))
1253              (a-buf mime-raw-buffer)
1254              fields)
1255         (save-excursion
1256           (set-buffer (setq new-buf (get-buffer-create new-name)))
1257           (erase-buffer)
1258           (insert-buffer-substring the-buf p-beg p-end)
1259           (goto-char (point-min))
1260           (let ((entity-node-id (mime-entity-node-id entity)) ci str)
1261             (while (progn
1262                      (setq
1263                       str
1264                       (save-excursion
1265                         (set-buffer a-buf)
1266                         (setq
1267                          ci
1268                          (mime-raw-find-entity-from-node-id entity-node-id))
1269                         (save-restriction
1270                           (narrow-to-region
1271                            (mime-entity-point-min ci)
1272                            (mime-entity-point-max ci)
1273                            )
1274                           (std11-header-string-except
1275                            (concat "^"
1276                                    (apply (function regexp-or) fields)
1277                                    ":") ""))))
1278                      (if (and
1279                           (eq (mime-entity-media-type ci) 'message)
1280                           (eq (mime-entity-media-subtype ci) 'rfc822))
1281                          nil
1282                        (if str
1283                            (insert str)
1284                          )
1285                        entity-node-id))
1286               (setq fields (std11-collect-field-names)
1287                     entity-node-id (cdr entity-node-id))
1288               )
1289             )
1290           (let ((rest mime-view-following-required-fields-list))
1291             (while rest
1292               (let ((field-name (car rest)))
1293                 (or (std11-field-body field-name)
1294                     (insert
1295                      (format
1296                       (concat field-name
1297                               ": "
1298                               (save-excursion
1299                                 (set-buffer the-buf)
1300                                 (set-buffer mime-mother-buffer)
1301                                 (set-buffer mime-raw-buffer)
1302                                 (std11-field-body field-name)
1303                                 )
1304                               "\n")))
1305                     ))
1306               (setq rest (cdr rest))
1307               ))
1308           (eword-decode-header)
1309           )
1310         (let ((f (cdr (assq mode mime-view-following-method-alist))))
1311           (if (functionp f)
1312               (funcall f new-buf)
1313             (message
1314              (format
1315               "Sorry, following method for %s is not implemented yet."
1316               mode))
1317             ))
1318         ))))
1319
1320
1321 ;;; @@ X-Face
1322 ;;;
1323
1324 (defun mime-preview-display-x-face ()
1325   (interactive)
1326   (save-window-excursion
1327     (set-buffer mime-raw-buffer)
1328     (mime-view-x-face-function)
1329     ))
1330
1331
1332 ;;; @@ moving
1333 ;;;
1334
1335 (defun mime-preview-move-to-upper ()
1336   "Move to upper entity.
1337 If there is no upper entity, call function `mime-preview-quit'."
1338   (interactive)
1339   (let (cinfo)
1340     (while (null (setq cinfo
1341                        (get-text-property (point) 'mime-view-entity)))
1342       (backward-char)
1343       )
1344     (let ((r (mime-raw-find-entity-from-node-id
1345               (cdr (mime-entity-node-id cinfo))
1346               (get-text-property 1 'mime-view-entity)))
1347           point)
1348       (catch 'tag
1349         (while (setq point (previous-single-property-change
1350                             (point) 'mime-view-entity))
1351           (goto-char point)
1352           (if (eq r (get-text-property (point) 'mime-view-entity))
1353               (throw 'tag t)
1354             )
1355           )
1356         (mime-preview-quit)
1357         ))))
1358
1359 (defun mime-preview-move-to-previous ()
1360   "Move to previous entity.
1361 If there is no previous entity, it calls function registered in
1362 variable `mime-view-over-to-previous-method-alist'."
1363   (interactive)
1364   (while (null (get-text-property (point) 'mime-view-entity))
1365     (backward-char)
1366     )
1367   (let ((point (previous-single-property-change (point) 'mime-view-entity)))
1368     (if point
1369         (if (get-text-property (1- point) 'mime-view-entity)
1370             (goto-char point)
1371           (goto-char (1- point))
1372           (mime-preview-move-to-previous)
1373           )
1374       (let ((f (assq (mime-preview-original-major-mode)
1375                      mime-view-over-to-previous-method-alist)))
1376         (if f
1377             (funcall (cdr f))
1378           ))
1379       )))
1380
1381 (defun mime-preview-move-to-next ()
1382   "Move to next entity.
1383 If there is no previous entity, it calls function registered in
1384 variable `mime-view-over-to-next-method-alist'."
1385   (interactive)
1386   (while (null (get-text-property (point) 'mime-view-entity))
1387     (forward-char)
1388     )
1389   (let ((point (next-single-property-change (point) 'mime-view-entity)))
1390     (if point
1391         (progn
1392           (goto-char point)
1393           (if (null (get-text-property point 'mime-view-entity))
1394               (mime-preview-move-to-next)
1395             ))
1396       (let ((f (assq (mime-preview-original-major-mode)
1397                      mime-view-over-to-next-method-alist)))
1398         (if f
1399             (funcall (cdr f))
1400           ))
1401       )))
1402
1403 (defun mime-preview-scroll-up-entity (&optional h)
1404   "Scroll up current entity.
1405 If reached to (point-max), it calls function registered in variable
1406 `mime-view-over-to-next-method-alist'."
1407   (interactive)
1408   (or h
1409       (setq h (1- (window-height)))
1410       )
1411   (if (= (point) (point-max))
1412       (let ((f (assq (mime-preview-original-major-mode)
1413                      mime-view-over-to-next-method-alist)))
1414         (if f
1415             (funcall (cdr f))
1416           ))
1417     (let ((point
1418            (or (next-single-property-change (point) 'mime-view-entity)
1419                (point-max))))
1420       (forward-line h)
1421       (if (> (point) point)
1422           (goto-char point)
1423         )
1424       )))
1425
1426 (defun mime-preview-scroll-down-entity (&optional h)
1427   "Scroll down current entity.
1428 If reached to (point-min), it calls function registered in variable
1429 `mime-view-over-to-previous-method-alist'."
1430   (interactive)
1431   (or h
1432       (setq h (1- (window-height)))
1433       )
1434   (if (= (point) (point-min))
1435       (let ((f (assq (mime-preview-original-major-mode)
1436                      mime-view-over-to-previous-method-alist)))
1437         (if f
1438             (funcall (cdr f))
1439           ))
1440     (let ((point
1441            (or (previous-single-property-change (point) 'mime-view-entity)
1442                (point-min))))
1443       (forward-line (- h))
1444       (if (< (point) point)
1445           (goto-char point)
1446         ))))
1447
1448 (defun mime-preview-next-line-entity ()
1449   (interactive)
1450   (mime-preview-scroll-up-entity 1)
1451   )
1452
1453 (defun mime-preview-previous-line-entity ()
1454   (interactive)
1455   (mime-preview-scroll-down-entity 1)
1456   )
1457
1458
1459 ;;; @@ quitting
1460 ;;;
1461
1462 (defun mime-preview-quit ()
1463   "Quit from MIME-preview buffer.
1464 It calls function registered in variable
1465 `mime-preview-quitting-method-alist'."
1466   (interactive)
1467   (let ((r (assq (mime-preview-original-major-mode)
1468                  mime-preview-quitting-method-alist)))
1469     (if r
1470         (funcall (cdr r))
1471       )))
1472
1473 (defun mime-preview-kill-buffer ()
1474   (interactive)
1475   (kill-buffer (current-buffer))
1476   )
1477
1478
1479 ;;; @ end
1480 ;;;
1481
1482 (provide 'mime-view)
1483
1484 (run-hooks 'mime-view-load-hook)
1485
1486 ;;; mime-view.el ends here