mime-view.el

   1 ;;; mime-view.el --- interactive MIME viewer for GNU Emacs
   2
   3 ;; Copyright (C) 1995,1996,1997,1998,1999,2000 Free Software Foundation, Inc.
   4
   5 ;; Author: MORIOKA Tomohiko <tomo@m17n.org>
   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 (Sample of Elastic 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 'emu)
  31 (require 'mime)
  32 (require 'semi-def)
  33 (require 'calist)
  34 (require 'alist)
  35 (require 'mailcap)
  36
  37
  38 ;;; @ version
  39 ;;;
  40
  41 (defconst mime-view-version
  42   (concat (mime-product-name mime-user-interface-product) " MIME-View "
  43           (mapconcat #'number-to-string
  44                      (mime-product-version mime-user-interface-product) ".")
  45           " (" (mime-product-code-name mime-user-interface-product) ")"))
  46
  47
  48 ;;; @ variables
  49 ;;;
  50
  51 (defgroup mime-view nil
  52   "MIME view mode"
  53   :group 'mime)
  54
  55 (defcustom mime-view-find-every-acting-situation t
  56   "*Find every available acting-situation if non-nil."
  57   :group 'mime-view
  58   :type 'boolean)
  59
  60 (defcustom mime-acting-situation-examples-file "~/.mime-example"
  61   "*File name of example about acting-situation demonstrated by user."
  62   :group 'mime-view
  63   :type 'file)
  64
  65 (defcustom mime-preview-move-scroll nil
  66   "*Decides whether to scroll when moving to next entity.
  67 When t, scroll the buffer. Non-nil but not t means scroll when
  68 the next entity is within next-screen-context-lines from top or
  69 buttom. Nil means don't scroll at all."
  70   :group 'mime-view
  71   :type '(choice (const :tag "Off" nil)
  72                  (const :tag "On" t)
  73                  (sexp :tag "Situation" 1)))
  74
  75 ;;; @ in raw-buffer (representation space)
  76 ;;;
  77
  78 (defvar mime-preview-buffer nil
  79   "MIME-preview buffer corresponding with the (raw) buffer.")
  80 (make-variable-buffer-local 'mime-preview-buffer)
  81
  82
  83 (defvar mime-raw-representation-type-alist
  84   '((mime-show-message-mode     . binary)
  85     (mime-temp-message-mode     . binary)
  86     (t                          . cooked)
  87     )
  88   "Alist of major-mode vs. representation-type of mime-raw-buffer.
  89 Each element looks like (SYMBOL . REPRESENTATION-TYPE).  SYMBOL is
  90 major-mode or t.  t means default.  REPRESENTATION-TYPE must be
  91 `binary' or `cooked'.")
  92
  93
  94 ;; (defun mime-raw-find-entity-from-point (point &optional message-info)
  95 ;;   "Return entity from POINT in mime-raw-buffer.
  96 ;; If optional argument MESSAGE-INFO is not specified,
  97 ;; `mime-message-structure' is used."
  98 ;;   (or message-info
  99 ;;       (setq message-info mime-message-structure))
 100 ;;   (if (and (<= (mime-entity-point-min message-info) point)
 101 ;;            (<= point (mime-entity-point-max message-info)))
 102 ;;       (let ((children (mime-entity-children message-info)))
 103 ;;         (catch 'tag
 104 ;;           (while children
 105 ;;             (let ((ret
 106 ;;                    (mime-raw-find-entity-from-point point (car children))))
 107 ;;               (if ret
 108 ;;                   (throw 'tag ret)
 109 ;;                 ))
 110 ;;             (setq children (cdr children)))
 111 ;;           message-info))))
 112 ;; (make-obsolete 'mime-raw-find-entity-from-point "don't use it.")
 113
 114
 115 ;;; @ in preview-buffer (presentation space)
 116 ;;;
 117
 118 (defvar mime-mother-buffer nil
 119   "Mother buffer corresponding with the (MIME-preview) buffer.
 120 If current MIME-preview buffer is generated by other buffer, such as
 121 message/partial, it is called `mother-buffer'.")
 122 (make-variable-buffer-local 'mime-mother-buffer)
 123
 124 ;; (defvar mime-raw-buffer nil
 125 ;;   "Raw buffer corresponding with the (MIME-preview) buffer.")
 126 ;; (make-variable-buffer-local 'mime-raw-buffer)
 127
 128 (defvar mime-preview-original-window-configuration nil
 129   "Window-configuration before mime-view-mode is called.")
 130 (make-variable-buffer-local 'mime-preview-original-window-configuration)
 131
 132 (defun mime-preview-original-major-mode (&optional recursive point)
 133   "Return major-mode of original buffer.
 134 If optional argument RECURSIVE is non-nil and current buffer has
 135 mime-mother-buffer, it returns original major-mode of the
 136 mother-buffer."
 137   (if (and recursive mime-mother-buffer)
 138       (save-excursion
 139         (set-buffer mime-mother-buffer)
 140         (mime-preview-original-major-mode recursive)
 141         )
 142     (cdr (assq 'major-mode
 143                (get-text-property (or point
 144                                       (if (> (point) (buffer-size))
 145                                           (max (1- (point-max)) (point-min))
 146                                         (point)))
 147                                   'mime-view-situation)))))
 148
 149
 150 ;;; @ entity information
 151 ;;;
 152
 153 (defun mime-entity-situation (entity &optional situation)
 154   "Return situation of ENTITY."
 155   (let (rest param name)
 156     ;; Content-Type
 157     (unless (assq 'type situation)
 158       (setq rest (or (mime-entity-content-type entity)
 159                      (make-mime-content-type 'text 'plain))
 160             situation (cons (car rest) situation)
 161             rest (cdr rest))
 162       )
 163     (unless (assq 'subtype situation)
 164       (or rest
 165           (setq rest (or (cdr (mime-entity-content-type entity))
 166                          '((subtype . plain)))))
 167       (setq situation (cons (car rest) situation)
 168             rest (cdr rest))
 169       )
 170     (while rest
 171       (setq param (car rest))
 172       (or (assoc (car param) situation)
 173           (setq situation (cons param situation)))
 174       (setq rest (cdr rest)))
 175
 176     ;; Content-Disposition
 177     (setq rest nil)
 178     (unless (assq 'disposition-type situation)
 179       (setq rest (mime-entity-content-disposition entity))
 180       (if rest
 181           (setq situation (cons (cons 'disposition-type
 182                                       (mime-content-disposition-type rest))
 183                                 situation)
 184                 rest (mime-content-disposition-parameters rest))
 185         ))
 186     (while rest
 187       (setq param (car rest)
 188             name (car param))
 189       (if (cond ((string= name "filename")
 190                  (if (assq 'filename situation)
 191                      nil
 192                    (setq name 'filename)))
 193                 ((string= name "creation-date")
 194                  (if (assq 'creation-date situation)
 195                      nil
 196                    (setq name 'creation-date)))
 197                 ((string= name "modification-date")
 198                  (if (assq 'modification-date situation)
 199                      nil
 200                    (setq name 'modification-date)))
 201                 ((string= name "read-date")
 202                  (if (assq 'read-date situation)
 203                      nil
 204                    (setq name 'read-date)))
 205                 ((string= name "size")
 206                  (if (assq 'size situation)
 207                      nil
 208                    (setq name 'size)))
 209                 (t (setq name (cons 'disposition name))
 210                    (if (assoc name situation)
 211                        nil
 212                      name)))
 213           (setq situation
 214                 (cons (cons name (cdr param))
 215                       situation)))
 216       (setq rest (cdr rest)))
 217
 218     ;; Content-Transfer-Encoding
 219     (or (assq 'encoding situation)
 220         (setq situation
 221               (cons (cons 'encoding (or (mime-entity-encoding entity)
 222                                         "7bit"))
 223                     situation)))
 224
 225     situation))
 226
 227 (defsubst mime-delq-null-situation (situations field
 228                                                &optional ignored-value)
 229   (let (dest)
 230     (while situations
 231       (let* ((situation (car situations))
 232              (cell (assq field situation)))
 233         (if cell
 234             (or (eq (cdr cell) ignored-value)
 235                 (setq dest (cons situation dest))
 236                 )))
 237       (setq situations (cdr situations)))
 238     dest))
 239
 240 (defun mime-compare-situation-with-example (situation example)
 241   (let ((example (copy-alist example))
 242         (match 0))
 243     (while situation
 244       (let* ((cell (car situation))
 245              (key (car cell))
 246              (ecell (assoc key example)))
 247         (when ecell
 248           (if (equal cell ecell)
 249               (setq match (1+ match))
 250             (setq example (delq ecell example))
 251             ))
 252         )
 253       (setq situation (cdr situation))
 254       )
 255     (cons match example)
 256     ))
 257
 258 (defun mime-sort-situation (situation)
 259   (sort situation
 260         #'(lambda (a b)
 261             (let ((a-t (car a))
 262                   (b-t (car b))
 263                   (order '((type . 1)
 264                            (subtype . 2)
 265                            (mode . 3)
 266                            (method . 4)
 267                            (major-mode . 5)
 268                            (disposition-type . 6)
 269                            ))
 270                   a-order b-order)
 271               (if (symbolp a-t)
 272                   (let ((ret (assq a-t order)))
 273                     (if ret
 274                         (setq a-order (cdr ret))
 275                       (setq a-order 7)
 276                       ))
 277                 (setq a-order 8)
 278                 )
 279               (if (symbolp b-t)
 280                   (let ((ret (assq b-t order)))
 281                     (if ret
 282                         (setq b-order (cdr ret))
 283                       (setq b-order 7)
 284                       ))
 285                 (setq b-order 8)
 286                 )
 287               (if (= a-order b-order)
 288                   (string< (format "%s" a-t)(format "%s" b-t))
 289                 (< a-order b-order))
 290               )))
 291   )
 292
 293 (defun mime-unify-situations (entity-situation condition situation-examples
 294                                                &optional ignored-method)
 295   (let (ret)
 296     (in-calist-package 'mime-view)
 297     (setq ret
 298           (mime-delq-null-situation
 299            (ctree-find-calist condition entity-situation
 300                               mime-view-find-every-acting-situation)
 301            'method ignored-method))
 302     (or (assq 'ignore-examples entity-situation)
 303         (if (cdr ret)
 304             (let ((rest ret)
 305                   (max-score 0)
 306                   (max-escore 0)
 307                   max-examples
 308                   max-situations)
 309               (while rest
 310                 (let ((situation (car rest))
 311                       (examples situation-examples))
 312                   (while examples
 313                     (let* ((ret
 314                             (mime-compare-situation-with-example
 315                              situation (caar examples)))
 316                            (ret-score (car ret)))
 317                       (cond ((> ret-score max-score)
 318                              (setq max-score ret-score
 319                                    max-escore (cdar examples)
 320                                    max-examples (list (cdr ret))
 321                                    max-situations (list situation))
 322                              )
 323                             ((= ret-score max-score)
 324                              (cond ((> (cdar examples) max-escore)
 325                                     (setq max-escore (cdar examples)
 326                                           max-examples (list (cdr ret))
 327                                           max-situations (list situation))
 328                                     )
 329                                    ((= (cdar examples) max-escore)
 330                                     (setq max-examples
 331                                           (cons (cdr ret) max-examples))
 332                                     (or (member situation max-situations)
 333                                         (setq max-situations
 334                                               (cons situation max-situations)))
 335                                     )))))
 336                     (setq examples (cdr examples))))
 337                 (setq rest (cdr rest)))
 338               (when max-situations
 339                 (setq ret max-situations)
 340                 (while max-examples
 341                   (let* ((example (car max-examples))
 342                          (cell
 343                           (assoc example situation-examples)))
 344                     (if cell
 345                         (setcdr cell (1+ (cdr cell)))
 346                       (setq situation-examples
 347                             (cons (cons example 0)
 348                                   situation-examples))
 349                       ))
 350                   (setq max-examples (cdr max-examples))
 351                   )))))
 352     (cons ret situation-examples)
 353     ;; ret: list of situations
 354     ;; situation-examples: new examples (notoce that contents of
 355     ;;                     argument `situation-examples' has bees modified)
 356     ))
 357
 358 (defun mime-view-entity-title (entity)
 359   (or (mime-entity-read-field entity 'Content-Description)
 360       (mime-entity-read-field entity 'Subject)
 361       (mime-entity-filename entity)
 362       ""))
 363
 364 (defvar mime-preview-situation-example-list nil)
 365 (defvar mime-acting-situation-example-list nil)
 366
 367 (defvar mime-acting-situation-example-list-max-size 16)
 368
 369 (defun mime-save-acting-situation-examples ()
 370   (let* ((file mime-acting-situation-examples-file)
 371          (buffer (get-buffer-create " *mime-example*")))
 372     (unwind-protect
 373         (save-excursion
 374           (set-buffer buffer)
 375           (setq buffer-file-name file)
 376           (erase-buffer)
 377           (insert ";;; " (file-name-nondirectory file) "\n")
 378           (insert "\n;; This file is generated automatically by "
 379                   mime-view-version "\n\n")
 380           (insert ";;; Code:\n\n")
 381           (pp `(setq mime-acting-situation-example-list
 382                      ',mime-acting-situation-example-list)
 383               (current-buffer))
 384           (insert "\n;;; "
 385                   (file-name-nondirectory file)
 386                   " ends here.\n")
 387           (save-buffer))
 388       (kill-buffer buffer))))
 389
 390 (add-hook 'kill-emacs-hook 'mime-save-acting-situation-examples)
 391
 392 (defun mime-reduce-acting-situation-examples ()
 393   (let ((len (length mime-acting-situation-example-list))
 394         i ir ic j jr jc ret
 395         dest d-i d-j
 396         (max-sim 0) sim
 397         min-det-ret det-ret
 398         min-det-org det-org
 399         min-freq freq)
 400     (setq i 0
 401           ir mime-acting-situation-example-list)
 402     (while (< i len)
 403       (setq ic (car ir)
 404             j 0
 405             jr mime-acting-situation-example-list)
 406       (while (< j len)
 407         (unless (= i j)
 408           (setq jc (car jr))
 409           (setq ret (mime-compare-situation-with-example (car ic)(car jc))
 410                 sim (car ret)
 411                 det-ret (+ (length (car ic))(length (car jc)))
 412                 det-org (length (cdr ret))
 413                 freq (+ (cdr ic)(cdr jc)))
 414           (cond ((< max-sim sim)
 415                  (setq max-sim sim
 416                        min-det-ret det-ret
 417                        min-det-org det-org
 418                        min-freq freq
 419                        d-i i
 420                        d-j j
 421                        dest (cons (cdr ret) freq))
 422                  )
 423                 ((= max-sim sim)
 424                  (cond ((> min-det-ret det-ret)
 425                         (setq min-det-ret det-ret
 426                               min-det-org det-org
 427                               min-freq freq
 428                               d-i i
 429                               d-j j
 430                               dest (cons (cdr ret) freq))
 431                         )
 432                        ((= min-det-ret det-ret)
 433                         (cond ((> min-det-org det-org)
 434                                (setq min-det-org det-org
 435                                      min-freq freq
 436                                      d-i i
 437                                      d-j j
 438                                      dest (cons (cdr ret) freq))
 439                                )
 440                               ((= min-det-org det-org)
 441                                (cond ((> min-freq freq)
 442                                       (setq min-freq freq
 443                                             d-i i
 444                                             d-j j
 445                                             dest (cons (cdr ret) freq))
 446                                       ))
 447                                ))
 448                         ))
 449                  ))
 450           )
 451         (setq jr (cdr jr)
 452               j (1+ j)))
 453       (setq ir (cdr ir)
 454             i (1+ i)))
 455     (if (> d-i d-j)
 456         (setq i d-i
 457               d-i d-j
 458               d-j i))
 459     (setq jr (nthcdr (1- d-j) mime-acting-situation-example-list))
 460     (setcdr jr (cddr jr))
 461     (if (= d-i 0)
 462         (setq mime-acting-situation-example-list
 463               (cdr mime-acting-situation-example-list))
 464       (setq ir (nthcdr (1- d-i) mime-acting-situation-example-list))
 465       (setcdr ir (cddr ir))
 466       )
 467     (if (setq ir (assoc (car dest) mime-acting-situation-example-list))
 468         (setcdr ir (+ (cdr ir)(cdr dest)))
 469       (setq mime-acting-situation-example-list
 470             (cons dest mime-acting-situation-example-list))
 471       )))
 472
 473
 474 ;;; @ presentation of preview
 475 ;;;
 476
 477 ;;; @@ entity-button
 478 ;;;
 479
 480 ;;; @@@ predicate function
 481 ;;;
 482
 483 (defun mime-view-entity-button-visible-p (entity)
 484   "Return non-nil if header of ENTITY is visible.
 485 Please redefine this function if you want to change default setting."
 486   (let ((media-type (mime-entity-media-type entity))
 487         (media-subtype (mime-entity-media-subtype entity)))
 488     (or (not (eq media-type 'application))
 489         (and (not (eq media-subtype 'x-selection))
 490              (or (not (eq media-subtype 'octet-stream))
 491                  (let ((mother-entity (mime-entity-parent entity)))
 492                    (or (not (eq (mime-entity-media-type mother-entity)
 493                                 'multipart))
 494                        (not (eq (mime-entity-media-subtype mother-entity)
 495                                 'encrypted)))
 496                    )
 497                  )))))
 498
 499 ;;; @@@ entity button generator
 500 ;;;
 501
 502 (defun mime-view-insert-entity-button (entity)
 503   "Insert entity-button of ENTITY."
 504   (let ((entity-node-id (mime-entity-node-id entity))
 505         (params (mime-entity-parameters entity))
 506         (subject (mime-view-entity-title entity)))
 507     (mime-insert-button
 508      (let ((access-type (assoc "access-type" params))
 509            (num (or (cdr (assoc "x-part-number" params))
 510                     (if (consp entity-node-id)
 511                         (mapconcat (function
 512                                     (lambda (num)
 513                                       (format "%s" (1+ num))
 514                                       ))
 515                                    (reverse entity-node-id) ".")
 516                       "0"))
 517                 ))
 518        (cond (access-type
 519               (let ((server (assoc "server" params)))
 520                 (setq access-type (cdr access-type))
 521                 (if server
 522                     (format "%s %s ([%s] %s)"
 523                             num subject access-type (cdr server))
 524                 (let ((site (cdr (assoc "site" params)))
 525                       (dir (cdr (assoc "directory" params)))
 526                       (url (cdr (assoc "url" params)))
 527                       )
 528                   (if url
 529                       (format "%s %s ([%s] %s)"
 530                               num subject access-type url)
 531                     (format "%s %s ([%s] %s:%s)"
 532                             num subject access-type site dir))
 533                   )))
 534             )
 535            (t
 536             (let ((media-type (mime-entity-media-type entity))
 537                   (media-subtype (mime-entity-media-subtype entity))
 538                   (charset (cdr (assoc "charset" params)))
 539                   (encoding (mime-entity-encoding entity)))
 540               (concat
 541                num " " subject
 542                (let ((rest
 543                       (format " <%s/%s%s%s>"
 544                               media-type media-subtype
 545                               (if charset
 546                                   (concat "; " charset)
 547                                 "")
 548                               (if encoding
 549                                   (concat " (" encoding ")")
 550                                 ""))))
 551                  (if (>= (+ (current-column)(length rest))(window-width))
 552                      "\n\t")
 553                  rest)))
 554             )))
 555      (function mime-preview-play-current-entity))
 556     ))
 557
 558
 559 ;;; @@ entity-header
 560 ;;;
 561
 562 (defvar mime-header-presentation-method-alist nil
 563   "Alist of major mode vs. corresponding header-presentation-method functions.
 564 Each element looks like (SYMBOL . FUNCTION).
 565 SYMBOL must be major mode in raw-buffer or t.  t means default.
 566 Interface of FUNCTION must be (ENTITY SITUATION).")
 567
 568 (defvar mime-view-ignored-field-list
 569   '(".*Received:" ".*Path:" ".*Id:" "^References:"
 570     "^Replied:" "^Errors-To:"
 571     "^Lines:" "^Sender:" ".*Host:" "^Xref:"
 572     "^Content-Type:" "^Precedence:"
 573     "^Status:" "^X-VM-.*:")
 574   "All fields that match this list will be hidden in MIME preview buffer.
 575 Each elements are regexp of field-name.")
 576
 577 (defvar mime-view-visible-field-list '("^Dnas.*:" "^Message-Id:")
 578   "All fields that match this list will be displayed in MIME preview buffer.
 579 Each elements are regexp of field-name.")
 580
 581
 582 ;;; @@ entity-body
 583 ;;;
 584
 585 ;;; @@@ predicate function
 586 ;;;
 587
 588 (in-calist-package 'mime-view)
 589
 590 (defun mime-calist::field-match-method-as-default-rule (calist
 591                                                         field-type field-value)
 592   (let ((s-field (assq field-type calist)))
 593     (cond ((null s-field)
 594            (cons (cons field-type field-value) calist)
 595            )
 596           (t calist))))
 597
 598 (define-calist-field-match-method
 599   'header #'mime-calist::field-match-method-as-default-rule)
 600
 601 (define-calist-field-match-method
 602   'body #'mime-calist::field-match-method-as-default-rule)
 603
 604
 605 (defvar mime-preview-condition nil
 606   "Condition-tree about how to display entity.")
 607
 608 (ctree-set-calist-strictly
 609  'mime-preview-condition '((type . application)(subtype . octet-stream)
 610                            (encoding . nil)
 611                            (body . visible)))
 612 (ctree-set-calist-strictly
 613  'mime-preview-condition '((type . application)(subtype . octet-stream)
 614                            (encoding . "7bit")
 615                            (body . visible)))
 616 (ctree-set-calist-strictly
 617  'mime-preview-condition '((type . application)(subtype . octet-stream)
 618                            (encoding . "8bit")
 619                            (body . visible)))
 620
 621 (ctree-set-calist-strictly
 622  'mime-preview-condition '((type . application)(subtype . pgp)
 623                            (body . visible)))
 624
 625 (ctree-set-calist-strictly
 626  'mime-preview-condition '((type . application)(subtype . x-latex)
 627                            (body . visible)))
 628
 629 (ctree-set-calist-strictly
 630  'mime-preview-condition '((type . application)(subtype . x-selection)
 631                            (body . visible)))
 632
 633 (ctree-set-calist-strictly
 634  'mime-preview-condition '((type . application)(subtype . x-comment)
 635                            (body . visible)))
 636
 637 (ctree-set-calist-strictly
 638  'mime-preview-condition '((type . message)(subtype . delivery-status)
 639                            (body . visible)))
 640
 641 (ctree-set-calist-strictly
 642  'mime-preview-condition
 643  '((body . visible)
 644    (body-presentation-method . mime-display-text/plain)))
 645
 646 (ctree-set-calist-strictly
 647  'mime-preview-condition
 648  '((type . nil)
 649    (body . visible)
 650    (body-presentation-method . mime-display-text/plain)))
 651
 652 (ctree-set-calist-strictly
 653  'mime-preview-condition
 654  '((type . text)(subtype . enriched)
 655    (body . visible)
 656    (body-presentation-method . mime-display-text/enriched)))
 657
 658 (ctree-set-calist-strictly
 659  'mime-preview-condition
 660  '((type . text)(subtype . richtext)
 661    (body . visible)
 662    (body-presentation-method . mime-display-text/richtext)))
 663
 664 (autoload 'mime-display-application/x-postpet "postpet")
 665
 666 (ctree-set-calist-strictly
 667  'mime-preview-condition
 668  '((type . application)(subtype . x-postpet)
 669    (body . visible)
 670    (body-presentation-method . mime-display-application/x-postpet)))
 671
 672 (ctree-set-calist-strictly
 673  'mime-preview-condition
 674  '((type . text)(subtype . t)
 675    (body . visible)
 676    (body-presentation-method . mime-display-text/plain)))
 677
 678 (ctree-set-calist-strictly
 679  'mime-preview-condition
 680  '((type . multipart)(subtype . alternative)
 681    (body . visible)
 682    (body-presentation-method . mime-display-multipart/alternative)))
 683
 684 (ctree-set-calist-strictly
 685  'mime-preview-condition '((type . message)(subtype . partial)
 686                            (body-presentation-method
 687                             . mime-display-message/partial-button)))
 688
 689 (ctree-set-calist-strictly
 690  'mime-preview-condition '((type . message)(subtype . rfc822)
 691                            (body-presentation-method . nil)
 692                            (childrens-situation (header . visible)
 693                                                 (entity-button . invisible))))
 694
 695 (ctree-set-calist-strictly
 696  'mime-preview-condition '((type . message)(subtype . news)
 697                            (body-presentation-method . nil)
 698                            (childrens-situation (header . visible)
 699                                                 (entity-button . invisible))))
 700
 701
 702 ;;; @@@ entity presentation
 703 ;;;
 704
 705 (defun mime-display-text/plain (entity situation)
 706   (save-restriction
 707     (narrow-to-region (point-max)(point-max))
 708     (mime-insert-text-content entity)
 709     (run-hooks 'mime-text-decode-hook)
 710     (goto-char (point-max))
 711     (if (not (eq (char-after (1- (point))) ?\n))
 712         (insert "\n")
 713       )
 714     (mime-add-url-buttons)
 715     (run-hooks 'mime-display-text/plain-hook)
 716     ))
 717
 718 (defun mime-display-text/richtext (entity situation)
 719   (save-restriction
 720     (narrow-to-region (point-max)(point-max))
 721     (mime-insert-text-content entity)
 722     (run-hooks 'mime-text-decode-hook)
 723     (let ((beg (point-min)))
 724       (remove-text-properties beg (point-max) '(face nil))
 725       (richtext-decode beg (point-max))
 726       )))
 727
 728 (defun mime-display-text/enriched (entity situation)
 729   (save-restriction
 730     (narrow-to-region (point-max)(point-max))
 731     (mime-insert-text-content entity)
 732     (run-hooks 'mime-text-decode-hook)
 733     (let ((beg (point-min)))
 734       (remove-text-properties beg (point-max) '(face nil))
 735       (enriched-decode beg (point-max))
 736       )))
 737
 738
 739 (defvar mime-view-announcement-for-message/partial
 740   (if (and (>= emacs-major-version 19) window-system)
 741       "\
 742 \[[ This is message/partial style split message. ]]
 743 \[[ Please press `v' key in this buffer          ]]
 744 \[[ or click here by mouse button-2.             ]]"
 745     "\
 746 \[[ This is message/partial style split message. ]]
 747 \[[ Please press `v' key in this buffer.         ]]"
 748     ))
 749
 750 (defun mime-display-message/partial-button (&optional entity situation)
 751   (save-restriction
 752     (goto-char (point-max))
 753     (if (not (search-backward "\n\n" nil t))
 754         (insert "\n")
 755       )
 756     (goto-char (point-max))
 757     (narrow-to-region (point-max)(point-max))
 758     (insert mime-view-announcement-for-message/partial)
 759     (mime-add-button (point-min)(point-max)
 760                      #'mime-preview-play-current-entity)
 761     ))
 762
 763 (defun mime-display-multipart/mixed (entity situation)
 764   (let ((children (mime-entity-children entity))
 765         (original-major-mode-cell (assq 'major-mode situation))
 766         (default-situation
 767           (cdr (assq 'childrens-situation situation))))
 768     (if original-major-mode-cell
 769         (setq default-situation
 770               (cons original-major-mode-cell default-situation)))
 771     (while children
 772       (mime-display-entity (car children) nil default-situation)
 773       (setq children (cdr children))
 774       )))
 775
 776 (defcustom mime-view-type-subtype-score-alist
 777   '(((text . enriched) . 3)
 778     ((text . richtext) . 2)
 779     ((text . plain)    . 1)
 780     (t . 0))
 781   "Alist MEDIA-TYPE vs corresponding score.
 782 MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t.  t means default."
 783   :group 'mime-view
 784   :type '(repeat (cons (choice :tag "Media-Type"
 785                                (cons :tag "Type/Subtype"
 786                                      (symbol :tag "Primary-type")
 787                                      (symbol :tag "Subtype"))
 788                                (symbol :tag "Type")
 789                                (const :tag "Default" t))
 790                        integer)))
 791
 792 (defun mime-display-multipart/alternative (entity situation)
 793   (let* ((children (mime-entity-children entity))
 794          (original-major-mode-cell (assq 'major-mode situation))
 795          (default-situation
 796            (cdr (assq 'childrens-situation situation)))
 797          (i 0)
 798          (p 0)
 799          (max-score 0)
 800          situations)
 801     (if original-major-mode-cell
 802         (setq default-situation
 803               (cons original-major-mode-cell default-situation)))
 804     (setq situations
 805           (mapcar (function
 806                    (lambda (child)
 807                      (let ((situation
 808                             (or (ctree-match-calist
 809                                  mime-preview-condition
 810                                  (append (mime-entity-situation child)
 811                                          default-situation))
 812                                 default-situation)))
 813                        (if (cdr (assq 'body-presentation-method situation))
 814                            (let ((score
 815                                   (cdr
 816                                    (or (assoc
 817                                         (cons
 818                                          (cdr (assq 'type situation))
 819                                          (cdr (assq 'subtype situation)))
 820                                         mime-view-type-subtype-score-alist)
 821                                        (assq
 822                                         (cdr (assq 'type situation))
 823                                         mime-view-type-subtype-score-alist)
 824                                        (assq
 825                                         t
 826                                         mime-view-type-subtype-score-alist)
 827                                        ))))
 828                              (if (> score max-score)
 829                                  (setq p i
 830                                        max-score score)
 831                                )))
 832                        (setq i (1+ i))
 833                        situation)
 834                      ))
 835                   children))
 836     (setq i 0)
 837     (while children
 838       (let ((child (car children))
 839             (situation (car situations)))
 840         (mime-display-entity child (if (= i p)
 841                                        situation
 842                                      (del-alist 'body-presentation-method
 843                                                 (copy-alist situation))))
 844         )
 845       (setq children (cdr children)
 846             situations (cdr situations)
 847             i (1+ i))
 848       )))
 849
 850
 851 ;;; @ acting-condition
 852 ;;;
 853
 854 (defvar mime-acting-condition nil
 855   "Condition-tree about how to process entity.")
 856
 857 (if (file-readable-p mailcap-file)
 858     (let ((entries (mailcap-parse-file)))
 859       (while entries
 860         (let ((entry (car entries))
 861               view print shared)
 862           (while entry
 863             (let* ((field (car entry))
 864                    (field-type (car field)))
 865               (cond ((eq field-type 'view)  (setq view field))
 866                     ((eq field-type 'print) (setq print field))
 867                     ((memq field-type '(compose composetyped edit)))
 868                     (t (setq shared (cons field shared))))
 869               )
 870             (setq entry (cdr entry))
 871             )
 872           (setq shared (nreverse shared))
 873           (ctree-set-calist-with-default
 874            'mime-acting-condition
 875            (append shared (list '(mode . "play")(cons 'method (cdr view)))))
 876           (if print
 877               (ctree-set-calist-with-default
 878                'mime-acting-condition
 879                (append shared
 880                        (list '(mode . "print")(cons 'method (cdr view))))
 881                ))
 882           )
 883         (setq entries (cdr entries))
 884         )))
 885
 886 (ctree-set-calist-strictly
 887  'mime-acting-condition
 888  '((type . application)(subtype . octet-stream)
 889    (mode . "play")
 890    (method . mime-detect-content)
 891    ))
 892
 893 (ctree-set-calist-with-default
 894  'mime-acting-condition
 895  '((mode . "extract")
 896    (method . mime-save-content)))
 897
 898 (ctree-set-calist-strictly
 899  'mime-acting-condition
 900  '((type . text)(subtype . x-rot13-47)(mode . "play")
 901    (method . mime-view-caesar)
 902    ))
 903 (ctree-set-calist-strictly
 904  'mime-acting-condition
 905  '((type . text)(subtype . x-rot13-47-48)(mode . "play")
 906    (method . mime-view-caesar)
 907    ))
 908
 909 (ctree-set-calist-strictly
 910  'mime-acting-condition
 911  '((type . message)(subtype . rfc822)(mode . "play")
 912    (method . mime-view-message/rfc822)
 913    ))
 914 (ctree-set-calist-strictly
 915  'mime-acting-condition
 916  '((type . message)(subtype . partial)(mode . "play")
 917    (method . mime-store-message/partial-piece)
 918    ))
 919
 920 (ctree-set-calist-strictly
 921  'mime-acting-condition
 922  '((type . message)(subtype . external-body)
 923    ("access-type" . "anon-ftp")
 924    (method . mime-view-message/external-anon-ftp)
 925    ))
 926
 927 (ctree-set-calist-strictly
 928  'mime-acting-condition
 929  '((type . message)(subtype . external-body)
 930    ("access-type" . "url")
 931    (method . mime-view-message/external-url)
 932    ))
 933
 934 (ctree-set-calist-strictly
 935  'mime-acting-condition
 936  '((type . application)(subtype . octet-stream)
 937    (method . mime-save-content)
 938    ))
 939
 940
 941 ;;; @ quitting method
 942 ;;;
 943
 944 (defvar mime-preview-quitting-method-alist
 945   '((mime-show-message-mode
 946      . mime-preview-quitting-method-for-mime-show-message-mode))
 947   "Alist of major-mode vs. quitting-method of mime-view.")
 948
 949 (defvar mime-preview-over-to-previous-method-alist nil
 950   "Alist of major-mode vs. over-to-previous-method of mime-view.")
 951
 952 (defvar mime-preview-over-to-next-method-alist nil
 953   "Alist of major-mode vs. over-to-next-method of mime-view.")
 954
 955
 956 ;;; @ following method
 957 ;;;
 958
 959 (defvar mime-preview-following-method-alist nil
 960   "Alist of major-mode vs. following-method of mime-view.")
 961
 962 (defvar mime-view-following-required-fields-list
 963   '("From"))
 964
 965
 966 ;;; @ buffer setup
 967 ;;;
 968
 969 (defun mime-display-entity (entity &optional situation
 970                                    default-situation preview-buffer)
 971   (or preview-buffer
 972       (setq preview-buffer (current-buffer)))
 973   (let* (e nb ne nhb nbb)
 974     (mime-goto-header-start-point entity)
 975     (in-calist-package 'mime-view)
 976     (or situation
 977         (setq situation
 978               (or (ctree-match-calist mime-preview-condition
 979                                       (append (mime-entity-situation entity)
 980                                               default-situation))
 981                   default-situation)))
 982     (let ((button-is-invisible
 983            (eq (cdr (assq 'entity-button situation)) 'invisible))
 984           (header-is-visible
 985            (eq (cdr (assq 'header situation)) 'visible))
 986           (header-presentation-method
 987            (or (cdr (assq 'header-presentation-method situation))
 988                (cdr (assq (cdr (assq 'major-mode situation))
 989                           mime-header-presentation-method-alist))))
 990           (body-presentation-method
 991            (cdr (assq 'body-presentation-method situation)))
 992           (children (mime-entity-children entity)))
 993       (set-buffer preview-buffer)
 994       (setq nb (point))
 995       (narrow-to-region nb nb)
 996       (or button-is-invisible
 997           (if (mime-view-entity-button-visible-p entity)
 998               (mime-view-insert-entity-button entity)
 999             ))
1000       (when header-is-visible
1001         (setq nhb (point))
1002         (if header-presentation-method
1003             (funcall header-presentation-method entity situation)
1004           (mime-insert-header entity
1005                               mime-view-ignored-field-list
1006                               mime-view-visible-field-list))
1007         (run-hooks 'mime-display-header-hook)
1008         (put-text-property nhb (point-max) 'mime-view-entity-header entity)
1009         (goto-char (point-max))
1010         (insert "\n")
1011         )
1012       (setq nbb (point))
1013       (cond (children)
1014             ((functionp body-presentation-method)
1015              (funcall body-presentation-method entity situation)
1016              )
1017             (t
1018              (when button-is-invisible
1019                (goto-char (point-max))
1020                (mime-view-insert-entity-button entity)
1021                )
1022              (or header-is-visible
1023                  (progn
1024                    (goto-char (point-max))
1025                    (insert "\n")
1026                    ))
1027              ))
1028       (setq ne (point-max))
1029       (widen)
1030       (put-text-property nb ne 'mime-view-entity entity)
1031       (put-text-property nb ne 'mime-view-situation situation)
1032       (put-text-property nbb ne 'mime-view-entity-body entity)
1033       (goto-char ne)
1034       (if children
1035           (if (functionp body-presentation-method)
1036               (funcall body-presentation-method entity situation)
1037             (mime-display-multipart/mixed entity situation)
1038             ))
1039       )))
1040
1041
1042 ;;; @ MIME viewer mode
1043 ;;;
1044
1045 (defconst mime-view-menu-title "MIME-View")
1046 (defconst mime-view-menu-list
1047   '((up          "Move to upper entity"    mime-preview-move-to-upper)
1048     (previous    "Move to previous entity" mime-preview-move-to-previous)
1049     (next        "Move to next entity"     mime-preview-move-to-next)
1050     (scroll-down "Scroll-down"             mime-preview-scroll-down-entity)
1051     (scroll-up   "Scroll-up"               mime-preview-scroll-up-entity)
1052     (play        "Play current entity"     mime-preview-play-current-entity)
1053     (extract     "Extract current entity"  mime-preview-extract-current-entity)
1054     (print       "Print current entity"    mime-preview-print-current-entity)
1055     )
1056   "Menu for MIME Viewer")
1057
1058 (cond ((featurep 'xemacs)
1059        (defvar mime-view-xemacs-popup-menu
1060          (cons mime-view-menu-title
1061                (mapcar (function
1062                         (lambda (item)
1063                           (vector (nth 1 item)(nth 2 item) t)
1064                           ))
1065                        mime-view-menu-list)))
1066        (defun mime-view-xemacs-popup-menu (event)
1067          "Popup the menu in the MIME Viewer buffer"
1068          (interactive "e")
1069          (select-window (event-window event))
1070          (set-buffer (event-buffer event))
1071          (popup-menu 'mime-view-xemacs-popup-menu))
1072        (defvar mouse-button-2 'button2)
1073        )
1074       (t
1075        (defvar mime-view-popup-menu
1076          (let ((menu (make-sparse-keymap mime-view-menu-title)))
1077            (nconc menu
1078                   (mapcar (function
1079                            (lambda (item)
1080                              (list (intern (nth 1 item)) 'menu-item
1081                                    (nth 1 item)(nth 2 item))
1082                              ))
1083                           mime-view-menu-list))))
1084        (defun mime-view-popup-menu (event)
1085          "Popup the menu in the MIME Viewer buffer"
1086          (interactive "@e")
1087          (let ((menu mime-view-popup-menu) events func)
1088            (setq events (x-popup-menu t menu))
1089            (and events
1090                 (setq func (lookup-key menu (apply #'vector events)))
1091                 (commandp func)
1092                 (funcall func))))
1093        (defvar mouse-button-2 [mouse-2])
1094        ))
1095
1096 (defun mime-view-define-keymap (&optional default)
1097   (let ((mime-view-mode-map (if (keymapp default)
1098                                 (copy-keymap default)
1099                               (make-sparse-keymap)
1100                               )))
1101     (define-key mime-view-mode-map
1102       "u"        (function mime-preview-move-to-upper))
1103     (define-key mime-view-mode-map
1104       "p"        (function mime-preview-move-to-previous))
1105     (define-key mime-view-mode-map
1106       "n"        (function mime-preview-move-to-next))
1107     (define-key mime-view-mode-map
1108       "\e\t"     (function mime-preview-move-to-previous))
1109     (define-key mime-view-mode-map
1110       "\t"       (function mime-preview-move-to-next))
1111     (define-key mime-view-mode-map
1112       " "        (function mime-preview-scroll-up-entity))
1113     (define-key mime-view-mode-map
1114       "\M- "     (function mime-preview-scroll-down-entity))
1115     (define-key mime-view-mode-map
1116       "\177"     (function mime-preview-scroll-down-entity))
1117     (define-key mime-view-mode-map
1118       "\C-m"     (function mime-preview-next-line-entity))
1119     (define-key mime-view-mode-map
1120       "\C-\M-m"  (function mime-preview-previous-line-entity))
1121     (define-key mime-view-mode-map
1122       "v"        (function mime-preview-play-current-entity))
1123     (define-key mime-view-mode-map
1124       "e"        (function mime-preview-extract-current-entity))
1125     (define-key mime-view-mode-map
1126       "\C-c\C-p" (function mime-preview-print-current-entity))
1127     (define-key mime-view-mode-map
1128       "a"        (function mime-preview-follow-current-entity))
1129     (define-key mime-view-mode-map
1130       "q"        (function mime-preview-quit))
1131     (define-key mime-view-mode-map
1132       "\C-c\C-x" (function mime-preview-kill-buffer))
1133     ;; (define-key mime-view-mode-map
1134     ;;   "<"        (function beginning-of-buffer))
1135     ;; (define-key mime-view-mode-map
1136     ;;   ">"        (function end-of-buffer))
1137     (define-key mime-view-mode-map
1138       "?"        (function describe-mode))
1139     (define-key mime-view-mode-map
1140       [tab] (function mime-preview-move-to-next))
1141     (define-key mime-view-mode-map
1142       [delete] (function mime-preview-scroll-down-entity))
1143     (define-key mime-view-mode-map
1144       [backspace] (function mime-preview-scroll-down-entity))
1145     (if (functionp default)
1146         (cond ((featurep 'xemacs)
1147                (set-keymap-default-binding mime-view-mode-map default)
1148                )
1149               (t
1150                (setq mime-view-mode-map
1151                      (append mime-view-mode-map (list (cons t default))))
1152                )))
1153     (if mouse-button-2
1154         (define-key mime-view-mode-map
1155           mouse-button-2 (function mime-button-dispatcher))
1156       )
1157     (cond ((featurep 'xemacs)
1158            (define-key mime-view-mode-map
1159              mouse-button-3 (function mime-view-xemacs-popup-menu))
1160            )
1161           ((>= emacs-major-version 19)
1162            (define-key mime-view-mode-map
1163              mouse-button-3 (function mime-view-popup-menu))
1164            (define-key mime-view-mode-map [menu-bar mime-view]
1165              (cons mime-view-menu-title
1166                    (make-sparse-keymap mime-view-menu-title)))
1167            (mapcar (function
1168                     (lambda (item)
1169                       (define-key mime-view-mode-map
1170                         (vector 'menu-bar 'mime-view (car item))
1171                         (cons (nth 1 item)(nth 2 item))
1172                         )
1173                       ))
1174                    (reverse mime-view-menu-list)
1175                    )
1176            ))
1177     (use-local-map mime-view-mode-map)
1178     (run-hooks 'mime-view-define-keymap-hook)
1179     ))
1180
1181 (defsubst mime-maybe-hide-echo-buffer ()
1182   "Clear mime-echo buffer and delete window for it."
1183   (let ((buf (get-buffer mime-echo-buffer-name)))
1184     (if buf
1185         (save-excursion
1186           (set-buffer buf)
1187           (erase-buffer)
1188           (let ((win (get-buffer-window buf)))
1189             (if win
1190                 (delete-window win)
1191               ))
1192           (bury-buffer buf)
1193           ))))
1194
1195 (defvar mime-view-redisplay nil)
1196
1197 ;;;###autoload
1198 (defun mime-display-message (message &optional preview-buffer
1199                                      mother default-keymap-or-function
1200                                      original-major-mode)
1201   "View MESSAGE in MIME-View mode.
1202
1203 Optional argument PREVIEW-BUFFER specifies the buffer of the
1204 presentation.  It must be either nil or a name of preview buffer.
1205
1206 Optional argument MOTHER specifies mother-buffer of the preview-buffer.
1207
1208 Optional argument DEFAULT-KEYMAP-OR-FUNCTION is nil, keymap or
1209 function.  If it is a keymap, keymap of MIME-View mode will be added
1210 to it.  If it is a function, it will be bound as default binding of
1211 keymap of MIME-View mode."
1212   (mime-maybe-hide-echo-buffer)
1213   (let ((win-conf (current-window-configuration)))
1214     (or preview-buffer
1215         (setq preview-buffer
1216               (concat "*Preview-" (mime-entity-name message) "*")))
1217     (or original-major-mode
1218         (setq original-major-mode
1219               (with-current-buffer (mime-entity-header-buffer message)
1220                 major-mode)))
1221     (let ((inhibit-read-only t))
1222       (set-buffer (get-buffer-create preview-buffer))
1223       (widen)
1224       (erase-buffer)
1225       (if mother
1226           (setq mime-mother-buffer mother)
1227         )
1228       (setq mime-preview-original-window-configuration win-conf)
1229       (setq major-mode 'mime-view-mode)
1230       (setq mode-name "MIME-View")
1231       (mime-display-entity message nil
1232                            `((entity-button . invisible)
1233                              (header . visible)
1234                              (major-mode . ,original-major-mode))
1235                            preview-buffer)
1236       (mime-view-define-keymap default-keymap-or-function)
1237       (let ((point
1238              (next-single-property-change (point-min) 'mime-view-entity)))
1239         (if point
1240             (goto-char point)
1241           (goto-char (point-min))
1242           (search-forward "\n\n" nil t)
1243           ))
1244       (run-hooks 'mime-view-mode-hook)
1245       (set-buffer-modified-p nil)
1246       (setq buffer-read-only t)
1247       preview-buffer)))
1248
1249 ;;;###autoload
1250 (defun mime-view-buffer (&optional raw-buffer preview-buffer mother
1251                                    default-keymap-or-function
1252                                    representation-type)
1253   "View RAW-BUFFER in MIME-View mode.
1254 Optional argument PREVIEW-BUFFER is either nil or a name of preview
1255 buffer.
1256 Optional argument DEFAULT-KEYMAP-OR-FUNCTION is nil, keymap or
1257 function.  If it is a keymap, keymap of MIME-View mode will be added
1258 to it.  If it is a function, it will be bound as default binding of
1259 keymap of MIME-View mode.
1260 Optional argument REPRESENTATION-TYPE is representation-type of
1261 message.  It must be nil, `binary' or `cooked'.  If it is nil,
1262 `cooked' is used as default."
1263   (interactive)
1264   (or raw-buffer
1265       (setq raw-buffer (current-buffer)))
1266   (or representation-type
1267       (setq representation-type
1268             (save-excursion
1269               (set-buffer raw-buffer)
1270               (cdr (or (assq major-mode mime-raw-representation-type-alist)
1271                        (assq t mime-raw-representation-type-alist)))
1272               )))
1273   (if (eq representation-type 'binary)
1274       (setq representation-type 'buffer)
1275     )
1276   (setq preview-buffer (mime-display-message
1277                         (mime-open-entity representation-type raw-buffer)
1278                         preview-buffer mother default-keymap-or-function))
1279   (or (get-buffer-window preview-buffer)
1280       (let ((r-win (get-buffer-window raw-buffer)))
1281         (if r-win
1282             (set-window-buffer r-win preview-buffer)
1283           (let ((m-win (and mother (get-buffer-window mother))))
1284             (if m-win
1285                 (set-window-buffer m-win preview-buffer)
1286               (switch-to-buffer preview-buffer)
1287               ))))))
1288
1289 (defun mime-view-mode (&optional mother ctl encoding
1290                                  raw-buffer preview-buffer
1291                                  default-keymap-or-function)
1292   "Major mode for viewing MIME message.
1293
1294 Here is a list of the standard keys for mime-view-mode.
1295
1296 key             feature
1297 ---             -------
1298
1299 u               Move to upper content
1300 p or M-TAB      Move to previous content
1301 n or TAB        Move to next content
1302 SPC             Scroll up or move to next content
1303 M-SPC or DEL    Scroll down or move to previous content
1304 RET             Move to next line
1305 M-RET           Move to previous line
1306 v               Decode current content as `play mode'
1307 e               Decode current content as `extract mode'
1308 C-c C-p         Decode current content as `print mode'
1309 a               Followup to current content.
1310 q               Quit
1311 button-2        Move to point under the mouse cursor
1312                 and decode current content as `play mode'
1313 "
1314   (interactive)
1315   (unless mime-view-redisplay
1316     (save-excursion
1317       (if raw-buffer (set-buffer raw-buffer))
1318       (let ((type
1319              (cdr
1320               (or (assq major-mode mime-raw-representation-type-alist)
1321                   (assq t mime-raw-representation-type-alist)))))
1322         (if (eq type 'binary)
1323             (setq type 'buffer)
1324           )
1325         (setq mime-message-structure (mime-open-entity type raw-buffer))
1326         (or (mime-entity-content-type mime-message-structure)
1327             (mime-entity-set-content-type-internal
1328              mime-message-structure ctl))
1329         )
1330       (or (mime-entity-encoding mime-message-structure)
1331           (mime-entity-set-encoding-internal mime-message-structure encoding))
1332       ))
1333   (mime-display-message mime-message-structure preview-buffer
1334                         mother default-keymap-or-function)
1335   )
1336
1337
1338 ;;; @@ playing
1339 ;;;
1340
1341 (autoload 'mime-preview-play-current-entity "mime-play"
1342   "Play current entity." t)
1343
1344 (defun mime-preview-extract-current-entity (&optional ignore-examples)
1345   "Extract current entity into file (maybe).
1346 It decodes current entity to call internal or external method as
1347 \"extract\" mode.  The method is selected from variable
1348 `mime-acting-condition'."
1349   (interactive "P")
1350   (mime-preview-play-current-entity ignore-examples "extract")
1351   )
1352
1353 (defun mime-preview-print-current-entity (&optional ignore-examples)
1354   "Print current entity (maybe).
1355 It decodes current entity to call internal or external method as
1356 \"print\" mode.  The method is selected from variable
1357 `mime-acting-condition'."
1358   (interactive "P")
1359   (mime-preview-play-current-entity ignore-examples "print")
1360   )
1361
1362
1363 ;;; @@ following
1364 ;;;
1365
1366 (defun mime-preview-follow-current-entity ()
1367   "Write follow message to current entity.
1368 It calls following-method selected from variable
1369 `mime-preview-following-method-alist'."
1370   (interactive)
1371   (let (entity)
1372     (while (null (setq entity
1373                        (get-text-property (point) 'mime-view-entity)))
1374       (backward-char)
1375       )
1376     (let* ((p-beg
1377             (previous-single-property-change (point) 'mime-view-entity))
1378            p-end
1379            ph-end
1380            (entity-node-id (mime-entity-node-id entity))
1381            (len (length entity-node-id))
1382            )
1383       (cond ((null p-beg)
1384              (setq p-beg
1385                    (if (eq (next-single-property-change (point-min)
1386                                                         'mime-view-entity)
1387                            (point))
1388                        (point)
1389                      (point-min)))
1390              )
1391             ((eq (next-single-property-change p-beg 'mime-view-entity)
1392                  (point))
1393              (setq p-beg (point))
1394              ))
1395       (setq p-end (next-single-property-change p-beg 'mime-view-entity))
1396       (cond ((null p-end)
1397              (setq p-end (point-max))
1398              )
1399             ((null entity-node-id)
1400              (setq p-end (point-max))
1401              )
1402             (t
1403              (save-excursion
1404                (goto-char p-end)
1405                (catch 'tag
1406                  (let (e)
1407                    (while (setq e
1408                                 (next-single-property-change
1409                                  (point) 'mime-view-entity))
1410                      (goto-char e)
1411                      (let ((rc (mime-entity-node-id
1412                                 (get-text-property (point)
1413                                                    'mime-view-entity))))
1414                        (or (equal entity-node-id
1415                                   (nthcdr (- (length rc) len) rc))
1416                            (throw 'tag nil)
1417                            ))
1418                      (setq p-end e)
1419                      ))
1420                  (setq p-end (point-max))
1421                  ))
1422              ))
1423       (setq ph-end
1424             (previous-single-property-change p-end 'mime-view-entity-header))
1425       (if (or (null ph-end)
1426               (< ph-end p-beg))
1427           (setq ph-end p-beg)
1428         )
1429       (let* ((mode (mime-preview-original-major-mode 'recursive))
1430              (new-name
1431               (format "%s-%s" (buffer-name) (reverse entity-node-id)))
1432              new-buf
1433              (the-buf (current-buffer))
1434              fields)
1435         (save-excursion
1436           (set-buffer (setq new-buf (get-buffer-create new-name)))
1437           (erase-buffer)
1438           (insert-buffer-substring the-buf ph-end p-end)
1439           (when (= ph-end p-beg)
1440             (goto-char (point-min))
1441             (insert ?\n))
1442           (goto-char (point-min))
1443           (let ((current-entity
1444                  (if (and (eq (mime-entity-media-type entity) 'message)
1445                           (eq (mime-entity-media-subtype entity) 'rfc822))
1446                      (mime-entity-children entity)
1447                    entity))
1448                 str)
1449             (while (and current-entity
1450                         (progn
1451                           (setq str
1452                                 (with-current-buffer
1453                                     (mime-entity-header-buffer current-entity)
1454                                   (save-restriction
1455                                     (narrow-to-region
1456                                      (mime-entity-header-start-point
1457                                       current-entity)
1458                                      (mime-entity-header-end-point
1459                                       current-entity))
1460                                     (std11-header-string-except
1461                                      (concat
1462                                       "^"
1463                                       (apply (function regexp-or) fields)
1464                                       ":") ""))))
1465                           (if (and (eq (mime-entity-media-type
1466                                         current-entity) 'message)
1467                                    (eq (mime-entity-media-subtype
1468                                         current-entity) 'rfc822))
1469                               nil
1470                             (if str
1471                                 (insert str)
1472                               )
1473                             t)))
1474               (setq fields (std11-collect-field-names)
1475                     current-entity (mime-entity-parent current-entity))
1476               )
1477             )
1478           (let ((rest mime-view-following-required-fields-list)
1479                 field-name ret)
1480             (while rest
1481               (setq field-name (car rest))
1482               (or (std11-field-body field-name)
1483                   (progn
1484                     (save-excursion
1485                       (set-buffer the-buf)
1486                       (let ((entity (when mime-mother-buffer
1487                                       (set-buffer mime-mother-buffer)
1488                                       (get-text-property (point)
1489                                                          'mime-view-entity))))
1490                         (while (and entity
1491                                     (null (setq ret (mime-entity-fetch-field
1492                                                      entity field-name))))
1493                           (setq entity (mime-entity-parent entity)))))
1494                     (if ret
1495                         (insert (concat field-name ": " ret "\n"))
1496                       )))
1497               (setq rest (cdr rest))
1498               ))
1499           (mime-decode-header-in-buffer)
1500           )
1501         (let ((f (cdr (assq mode mime-preview-following-method-alist))))
1502           (if (functionp f)
1503               (funcall f new-buf)
1504             (message
1505              (format
1506               "Sorry, following method for %s is not implemented yet."
1507               mode))
1508             ))
1509         ))))
1510
1511
1512 ;;; @@ moving
1513 ;;;
1514
1515 (defun mime-preview-move-to-upper ()
1516   "Move to upper entity.
1517 If there is no upper entity, call function `mime-preview-quit'."
1518   (interactive)
1519   (let (cinfo)
1520     (while (null (setq cinfo
1521                        (get-text-property (point) 'mime-view-entity)))
1522       (backward-char)
1523       )
1524     (let ((r (mime-entity-parent cinfo))
1525           point)
1526       (catch 'tag
1527         (while (setq point (previous-single-property-change
1528                             (point) 'mime-view-entity))
1529           (goto-char point)
1530           (when (eq r (get-text-property (point) 'mime-view-entity))
1531             (if (or (eq mime-preview-move-scroll t)
1532                     (and mime-preview-move-scroll
1533                          (>= point
1534                              (save-excursion
1535                                (move-to-window-line -1)
1536                                (forward-line (* -1 next-screen-context-lines))
1537                                (beginning-of-line)
1538                                (point)))))
1539                 (recenter next-screen-context-lines))
1540             (throw 'tag t)
1541             )
1542           )
1543         (mime-preview-quit)
1544         ))))
1545
1546 (defun mime-preview-move-to-previous ()
1547   "Move to previous entity.
1548 If there is no previous entity, it calls function registered in
1549 variable `mime-preview-over-to-previous-method-alist'."
1550   (interactive)
1551   (while (and (not (bobp))
1552               (null (get-text-property (point) 'mime-view-entity)))
1553     (backward-char)
1554     )
1555   (let ((point (previous-single-property-change (point) 'mime-view-entity)))
1556     (if (and point
1557              (>= point (point-min)))
1558         (if (get-text-property (1- point) 'mime-view-entity)
1559             (progn (goto-char point)
1560                    (if
1561                     (or (eq mime-preview-move-scroll t)
1562                         (and mime-preview-move-scroll
1563                              (<= point
1564                                 (save-excursion
1565                                   (move-to-window-line 0)
1566                                   (forward-line next-screen-context-lines)
1567                                   (end-of-line)
1568                                   (point)))))
1569                         (recenter (* -1 next-screen-context-lines))))
1570           (goto-char (1- point))
1571           (mime-preview-move-to-previous)
1572           )
1573       (let ((f (assq (mime-preview-original-major-mode)
1574                      mime-preview-over-to-previous-method-alist)))
1575         (if f
1576             (funcall (cdr f))
1577           ))
1578       )))
1579
1580 (defun mime-preview-move-to-next ()
1581   "Move to next entity.
1582 If there is no previous entity, it calls function registered in
1583 variable `mime-preview-over-to-next-method-alist'."
1584   (interactive)
1585   (while (and (not (eobp))
1586               (null (get-text-property (point) 'mime-view-entity)))
1587     (forward-char)
1588     )
1589   (let ((point (next-single-property-change (point) 'mime-view-entity)))
1590     (if (and point
1591              (<= point (point-max)))
1592         (progn
1593           (goto-char point)
1594           (if (null (get-text-property point 'mime-view-entity))
1595               (mime-preview-move-to-next)
1596             (and
1597              (or (eq mime-preview-move-scroll t)
1598                  (and mime-preview-move-scroll
1599                       (>= point
1600                          (save-excursion
1601                            (move-to-window-line -1)
1602                            (forward-line
1603                             (* -1 next-screen-context-lines))
1604                            (beginning-of-line)
1605                            (point)))))
1606                  (recenter next-screen-context-lines))
1607             ))
1608       (let ((f (assq (mime-preview-original-major-mode)
1609                      mime-preview-over-to-next-method-alist)))
1610         (if f
1611             (funcall (cdr f))
1612           ))
1613       )))
1614
1615 (defun mime-preview-scroll-up-entity (&optional h)
1616   "Scroll up current entity.
1617 If reached to (point-max), it calls function registered in variable
1618 `mime-preview-over-to-next-method-alist'."
1619   (interactive)
1620   (if (eobp)
1621       (let ((f (assq (mime-preview-original-major-mode)
1622                      mime-preview-over-to-next-method-alist)))
1623         (if f
1624             (funcall (cdr f))
1625           ))
1626     (let ((point
1627            (or (next-single-property-change (point) 'mime-view-entity)
1628                (point-max)))
1629           (bottom (window-end (selected-window))))
1630       (if (and (not h)
1631                (> bottom point))
1632           (progn (goto-char point)
1633                  (recenter next-screen-context-lines))
1634         (condition-case nil
1635             (scroll-up h)
1636           (end-of-buffer
1637            (goto-char (point-max)))))
1638       )))
1639
1640 (defun mime-preview-scroll-down-entity (&optional h)
1641   "Scroll down current entity.
1642 If reached to (point-min), it calls function registered in variable
1643 `mime-preview-over-to-previous-method-alist'."
1644   (interactive)
1645   (if (bobp)
1646       (let ((f (assq (mime-preview-original-major-mode)
1647                      mime-preview-over-to-previous-method-alist)))
1648         (if f
1649             (funcall (cdr f))
1650           ))
1651     (let ((point
1652            (or (previous-single-property-change (point) 'mime-view-entity)
1653                (point-min)))
1654           (top (window-start (selected-window))))
1655       (if (and (not h)
1656                (< top point))
1657           (progn (goto-char point)
1658                  (recenter (* -1 next-screen-context-lines)))
1659         (condition-case nil
1660             (scroll-down h)
1661           (beginning-of-buffer
1662            (goto-char (point-min)))))
1663       )))
1664
1665 (defun mime-preview-next-line-entity (&optional lines)
1666   "Scroll up one line (or prefix LINES lines).
1667 If LINES is negative, scroll down LINES lines."
1668   (interactive "p")
1669   (mime-preview-scroll-up-entity (or lines 1))
1670   )
1671
1672 (defun mime-preview-previous-line-entity (&optional lines)
1673   "Scrroll down one line (or prefix LINES lines).
1674 If LINES is negative, scroll up LINES lines."
1675   (interactive "p")
1676   (mime-preview-scroll-down-entity (or lines 1))
1677   )
1678
1679 ;;; @@ quitting
1680 ;;;
1681
1682 (defun mime-preview-quit ()
1683   "Quit from MIME-preview buffer.
1684 It calls function registered in variable
1685 `mime-preview-quitting-method-alist'."
1686   (interactive)
1687   (let ((r (assq (mime-preview-original-major-mode)
1688                  mime-preview-quitting-method-alist)))
1689     (if r
1690         (funcall (cdr r))
1691       )))
1692
1693 (defun mime-preview-kill-buffer ()
1694   (interactive)
1695   (kill-buffer (current-buffer))
1696   )
1697
1698
1699 ;;; @ end
1700 ;;;
1701
1702 (provide 'mime-view)
1703
1704 (let* ((file mime-acting-situation-examples-file)
1705        (buffer (get-buffer-create " *mime-example*")))
1706   (if (file-readable-p file)
1707       (unwind-protect
1708           (save-excursion
1709             (set-buffer buffer)
1710             (erase-buffer)
1711             (insert-file-contents file)
1712             (eval-buffer)
1713             ;; format check
1714             (condition-case nil
1715                 (let ((i 0))
1716                   (while (and (> (length mime-acting-situation-example-list)
1717                                  mime-acting-situation-example-list-max-size)
1718                               (< i 16))
1719                     (mime-reduce-acting-situation-examples)
1720                     (setq i (1+ i))
1721                     ))
1722               (error (setq mime-acting-situation-example-list nil)))
1723             )
1724         (kill-buffer buffer))))
1725
1726 ;;; mime-view.el ends here