mime-view.el

   1 ;;; mime-view.el --- interactive MIME viewer for GNU Emacs
   2
   3 ;; Copyright (C) 1995,96,97,98,99,2000 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 'mime)
  31 (require 'semi-def)
  32 (require 'calist)
  33 (require 'alist)
  34 (require 'mime-conf)
  35
  36 (eval-when-compile (require 'static))
  37
  38
  39 ;;; @ version
  40 ;;;
  41
  42 (defconst mime-view-version
  43   (concat (mime-product-name mime-user-interface-product) " MIME-View "
  44           (mapconcat #'number-to-string
  45                      (mime-product-version mime-user-interface-product) ".")
  46           " (" (mime-product-code-name mime-user-interface-product) ")"))
  47
  48
  49 ;;; @ variables
  50 ;;;
  51
  52 (defgroup mime-view nil
  53   "MIME view mode"
  54   :group 'mime)
  55
  56 (defcustom mime-situation-examples-file "~/.mime-example"
  57   "*File name of situation-examples demonstrated by user."
  58   :group 'mime-view
  59   :type 'file)
  60
  61 (defcustom mime-preview-move-scroll nil
  62   "*Decides whether to scroll when moving to next entity.
  63 When t, scroll the buffer. Non-nil but not t means scroll when
  64 the next entity is within next-screen-context-lines from top or
  65 buttom. Nil means don't scroll at all."
  66   :group 'mime-view
  67   :type '(choice (const :tag "Off" nil)
  68                  (const :tag "On" t)
  69                  (sexp :tag "Situation" 1)))
  70
  71 (defcustom mime-view-mailcap-files
  72   (let ((files '("/etc/mailcap" "/usr/etc/mailcap" "~/.mailcap")))
  73     (or (member mime-mailcap-file files)
  74         (setq files (cons mime-mailcap-file files)))
  75     files)
  76   "List of mailcap files."
  77   :group 'mime-view
  78   :type '(repeat file))
  79
  80
  81 ;;; @ in raw-buffer (representation space)
  82 ;;;
  83
  84 (defvar mime-preview-buffer nil
  85   "MIME-preview buffer corresponding with the (raw) buffer.")
  86 (make-variable-buffer-local 'mime-preview-buffer)
  87
  88
  89 (defvar mime-raw-representation-type-alist
  90   '((mime-show-message-mode     . binary)
  91     (mime-temp-message-mode     . binary)
  92     (t                          . cooked)
  93     )
  94   "Alist of major-mode vs. representation-type of mime-raw-buffer.
  95 Each element looks like (SYMBOL . REPRESENTATION-TYPE).  SYMBOL is
  96 major-mode or t.  t means default.  REPRESENTATION-TYPE must be
  97 `binary' or `cooked'.")
  98
  99
 100 ;;; @ in preview-buffer (presentation space)
 101 ;;;
 102
 103 (defvar mime-mother-buffer nil
 104   "Mother buffer corresponding with the (MIME-preview) buffer.
 105 If current MIME-preview buffer is generated by other buffer, such as
 106 message/partial, it is called `mother-buffer'.")
 107 (make-variable-buffer-local 'mime-mother-buffer)
 108
 109 ;; (defvar mime-raw-buffer nil
 110 ;;   "Raw buffer corresponding with the (MIME-preview) buffer.")
 111 ;; (make-variable-buffer-local 'mime-raw-buffer)
 112
 113 (defvar mime-preview-original-window-configuration nil
 114   "Window-configuration before mime-view-mode is called.")
 115 (make-variable-buffer-local 'mime-preview-original-window-configuration)
 116
 117 (defun mime-preview-original-major-mode (&optional recursive point)
 118   "Return major-mode of original buffer.
 119 If optional argument RECURSIVE is non-nil and current buffer has
 120 mime-mother-buffer, it returns original major-mode of the
 121 mother-buffer."
 122   (if (and recursive mime-mother-buffer)
 123       (save-excursion
 124         (set-buffer mime-mother-buffer)
 125         (mime-preview-original-major-mode recursive)
 126         )
 127     (cdr (assq 'major-mode
 128                (get-text-property (or point
 129                                       (if (> (point) (buffer-size))
 130                                           (max (1- (point-max)) (point-min))
 131                                         (point)))
 132                                   'mime-view-situation)))))
 133
 134
 135 ;;; @ entity information
 136 ;;;
 137
 138 (defun mime-entity-situation (entity &optional situation)
 139   "Return situation of ENTITY."
 140   (let (rest param name)
 141     ;; Content-Type
 142     (unless (assq 'type situation)
 143       (setq rest (or (mime-entity-content-type entity)
 144                      (make-mime-content-type 'text 'plain))
 145             situation (cons (car rest) situation)
 146             rest (cdr rest))
 147       )
 148     (unless (assq 'subtype situation)
 149       (or rest
 150           (setq rest (or (cdr (mime-entity-content-type entity))
 151                          '((subtype . plain)))))
 152       (setq situation (cons (car rest) situation)
 153             rest (cdr rest))
 154       )
 155     (while rest
 156       (setq param (car rest))
 157       (or (assoc (car param) situation)
 158           (setq situation (cons param situation)))
 159       (setq rest (cdr rest)))
 160
 161     ;; Content-Disposition
 162     (setq rest nil)
 163     (unless (assq 'disposition-type situation)
 164       (setq rest (mime-entity-content-disposition entity))
 165       (if rest
 166           (setq situation (cons (cons 'disposition-type
 167                                       (mime-content-disposition-type rest))
 168                                 situation)
 169                 rest (mime-content-disposition-parameters rest))
 170         ))
 171     (while rest
 172       (setq param (car rest)
 173             name (car param))
 174       (if (cond ((string= name "filename")
 175                  (if (assq 'filename situation)
 176                      nil
 177                    (setq name 'filename)))
 178                 ((string= name "creation-date")
 179                  (if (assq 'creation-date situation)
 180                      nil
 181                    (setq name 'creation-date)))
 182                 ((string= name "modification-date")
 183                  (if (assq 'modification-date situation)
 184                      nil
 185                    (setq name 'modification-date)))
 186                 ((string= name "read-date")
 187                  (if (assq 'read-date situation)
 188                      nil
 189                    (setq name 'read-date)))
 190                 ((string= name "size")
 191                  (if (assq 'size situation)
 192                      nil
 193                    (setq name 'size)))
 194                 (t (setq name (cons 'disposition name))
 195                    (if (assoc name situation)
 196                        nil
 197                      name)))
 198           (setq situation
 199                 (cons (cons name (cdr param))
 200                       situation)))
 201       (setq rest (cdr rest)))
 202
 203     ;; Content-Transfer-Encoding
 204     (or (assq 'encoding situation)
 205         (setq situation
 206               (cons (cons 'encoding (or (mime-entity-encoding entity)
 207                                         "7bit"))
 208                     situation)))
 209
 210     situation))
 211
 212 (defsubst mime-delq-null-situation (situations field
 213                                                &rest ignored-values)
 214   (let (dest)
 215     (while situations
 216       (let* ((situation (car situations))
 217              (cell (assq field situation)))
 218         (if cell
 219             (or (memq (cdr cell) ignored-values)
 220                 (setq dest (cons situation dest))
 221                 )))
 222       (setq situations (cdr situations)))
 223     dest))
 224
 225 (defun mime-compare-situation-with-example (situation example)
 226   (let ((example (copy-alist example))
 227         (match 0))
 228     (while situation
 229       (let* ((cell (car situation))
 230              (key (car cell))
 231              (ecell (assoc key example)))
 232         (when ecell
 233           (if (equal cell ecell)
 234               (setq match (1+ match))
 235             (setq example (delq ecell example))
 236             ))
 237         )
 238       (setq situation (cdr situation))
 239       )
 240     (cons match example)
 241     ))
 242
 243 (defun mime-sort-situation (situation)
 244   (sort situation
 245         #'(lambda (a b)
 246             (let ((a-t (car a))
 247                   (b-t (car b))
 248                   (order '((type . 1)
 249                            (subtype . 2)
 250                            (mode . 3)
 251                            (method . 4)
 252                            (major-mode . 5)
 253                            (disposition-type . 6)
 254                            ))
 255                   a-order b-order)
 256               (if (symbolp a-t)
 257                   (let ((ret (assq a-t order)))
 258                     (if ret
 259                         (setq a-order (cdr ret))
 260                       (setq a-order 7)
 261                       ))
 262                 (setq a-order 8)
 263                 )
 264               (if (symbolp b-t)
 265                   (let ((ret (assq b-t order)))
 266                     (if ret
 267                         (setq b-order (cdr ret))
 268                       (setq b-order 7)
 269                       ))
 270                 (setq b-order 8)
 271                 )
 272               (if (= a-order b-order)
 273                   (string< (format "%s" a-t)(format "%s" b-t))
 274                 (< a-order b-order))
 275               )))
 276   )
 277
 278 (defun mime-unify-situations (entity-situation
 279                               condition situation-examples
 280                               &optional required-name ignored-value
 281                               every-situations)
 282   (let (ret)
 283     (in-calist-package 'mime-view)
 284     (setq ret
 285           (ctree-find-calist condition entity-situation
 286                              every-situations))
 287     (if required-name
 288         (setq ret (mime-delq-null-situation ret required-name
 289                                             ignored-value t)))
 290     (or (assq 'ignore-examples entity-situation)
 291         (if (cdr ret)
 292             (let ((rest ret)
 293                   (max-score 0)
 294                   (max-escore 0)
 295                   max-examples
 296                   max-situations)
 297               (while rest
 298                 (let ((situation (car rest))
 299                       (examples situation-examples))
 300                   (while examples
 301                     (let* ((ret
 302                             (mime-compare-situation-with-example
 303                              situation (caar examples)))
 304                            (ret-score (car ret)))
 305                       (cond ((> ret-score max-score)
 306                              (setq max-score ret-score
 307                                    max-escore (cdar examples)
 308                                    max-examples (list (cdr ret))
 309                                    max-situations (list situation))
 310                              )
 311                             ((= ret-score max-score)
 312                              (cond ((> (cdar examples) max-escore)
 313                                     (setq max-escore (cdar examples)
 314                                           max-examples (list (cdr ret))
 315                                           max-situations (list situation))
 316                                     )
 317                                    ((= (cdar examples) max-escore)
 318                                     (setq max-examples
 319                                           (cons (cdr ret) max-examples))
 320                                     (or (member situation max-situations)
 321                                         (setq max-situations
 322                                               (cons situation max-situations)))
 323                                     )))))
 324                     (setq examples (cdr examples))))
 325                 (setq rest (cdr rest)))
 326               (when max-situations
 327                 (setq ret max-situations)
 328                 (while max-examples
 329                   (let* ((example (car max-examples))
 330                          (cell
 331                           (assoc example situation-examples)))
 332                     (if cell
 333                         (setcdr cell (1+ (cdr cell)))
 334                       (setq situation-examples
 335                             (cons (cons example 0)
 336                                   situation-examples))
 337                       ))
 338                   (setq max-examples (cdr max-examples))
 339                   )))))
 340     (cons ret situation-examples)
 341     ;; ret: list of situations
 342     ;; situation-examples: new examples (notoce that contents of
 343     ;;                     argument `situation-examples' has bees modified)
 344     ))
 345
 346 (defun mime-view-entity-title (entity)
 347   (or (mime-entity-read-field entity 'Content-Description)
 348       (mime-entity-read-field entity 'Subject)
 349       (mime-entity-filename entity)
 350       ""))
 351
 352 (defvar mime-preview-situation-example-list nil)
 353 (defvar mime-preview-situation-example-list-max-size 16)
 354 ;; (defvar mime-preview-situation-example-condition nil)
 355
 356 (defun mime-find-entity-preview-situation (entity
 357                                            &optional default-situation)
 358   (or (let ((ret
 359              (mime-unify-situations
 360               (append (mime-entity-situation entity)
 361                       default-situation)
 362               mime-preview-condition
 363               mime-preview-situation-example-list)))
 364         (setq mime-preview-situation-example-list
 365               (cdr ret))
 366         (caar ret))
 367       default-situation))
 368
 369
 370 (defvar mime-acting-situation-example-list nil)
 371 (defvar mime-acting-situation-example-list-max-size 16)
 372 (defvar mime-situation-examples-file-coding-system nil)
 373
 374 (defun mime-view-read-situation-examples-file (&optional file)
 375   (or file
 376       (setq file mime-situation-examples-file))
 377   (if (and file
 378            (file-readable-p file))
 379       (with-temp-buffer
 380         (insert-file-contents file)
 381         (setq mime-situation-examples-file-coding-system
 382               (static-cond
 383                ((boundp 'buffer-file-coding-system)
 384                 (symbol-value 'buffer-file-coding-system))
 385                ((boundp 'file-coding-system)
 386                 (symbol-value 'file-coding-system))
 387                (t nil))
 388               ;; (and (boundp 'buffer-file-coding-system)
 389               ;;      buffer-file-coding-system)
 390               )
 391         (condition-case error
 392             (eval-buffer)
 393           (error (message "%s is broken: %s" file (cdr error))))
 394         ;; format check
 395         (condition-case nil
 396             (let ((i 0))
 397               (while (and (> (length mime-preview-situation-example-list)
 398                              mime-preview-situation-example-list-max-size)
 399                           (< i 16))
 400                 (setq mime-preview-situation-example-list
 401                       (mime-reduce-situation-examples
 402                        mime-preview-situation-example-list))
 403                 (setq i (1+ i))))
 404           (error (setq mime-preview-situation-example-list nil)))
 405         ;; (let ((rest mime-preview-situation-example-list))
 406         ;;   (while rest
 407         ;;     (ctree-set-calist-strictly 'mime-preview-condition
 408         ;;                                (caar rest))
 409         ;;     (setq rest (cdr rest))))
 410         (condition-case nil
 411             (let ((i 0))
 412               (while (and (> (length mime-acting-situation-example-list)
 413                              mime-acting-situation-example-list-max-size)
 414                           (< i 16))
 415                 (setq mime-acting-situation-example-list
 416                       (mime-reduce-situation-examples
 417                        mime-acting-situation-example-list))
 418                 (setq i (1+ i))))
 419           (error (setq mime-acting-situation-example-list nil))))))
 420
 421 (defun mime-save-situation-examples ()
 422   (if (or mime-preview-situation-example-list
 423           mime-acting-situation-example-list)
 424       (let ((file mime-situation-examples-file)
 425             print-length print-level)
 426         (with-temp-buffer
 427           (insert ";;; " (file-name-nondirectory file) "\n")
 428           (insert "\n;; This file is generated automatically by "
 429                   mime-view-version "\n\n")
 430           (insert ";;; Code:\n\n")
 431           (if mime-preview-situation-example-list
 432               (pp `(setq mime-preview-situation-example-list
 433                          ',mime-preview-situation-example-list)
 434                   (current-buffer)))
 435           (if mime-acting-situation-example-list
 436               (pp `(setq mime-acting-situation-example-list
 437                          ',mime-acting-situation-example-list)
 438                   (current-buffer)))
 439           (insert "\n;;; "
 440                   (file-name-nondirectory file)
 441                   " ends here.\n")
 442           (static-cond
 443            ((boundp 'buffer-file-coding-system)
 444             (setq buffer-file-coding-system
 445                   mime-situation-examples-file-coding-system))
 446            ((boundp 'file-coding-system)
 447             (setq file-coding-system
 448                   mime-situation-examples-file-coding-system)))
 449           ;; (setq buffer-file-coding-system
 450           ;;       mime-situation-examples-file-coding-system)
 451           (setq buffer-file-name file)
 452           (save-buffer)))))
 453
 454 (add-hook 'kill-emacs-hook 'mime-save-situation-examples)
 455
 456 (defun mime-reduce-situation-examples (situation-examples)
 457   (let ((len (length situation-examples))
 458         i ir ic j jr jc ret
 459         dest d-i d-j
 460         (max-sim 0) sim
 461         min-det-ret det-ret
 462         min-det-org det-org
 463         min-freq freq)
 464     (setq i 0
 465           ir situation-examples)
 466     (while (< i len)
 467       (setq ic (car ir)
 468             j 0
 469             jr situation-examples)
 470       (while (< j len)
 471         (unless (= i j)
 472           (setq jc (car jr))
 473           (setq ret (mime-compare-situation-with-example (car ic)(car jc))
 474                 sim (car ret)
 475                 det-ret (+ (length (car ic))(length (car jc)))
 476                 det-org (length (cdr ret))
 477                 freq (+ (cdr ic)(cdr jc)))
 478           (cond ((< max-sim sim)
 479                  (setq max-sim sim
 480                        min-det-ret det-ret
 481                        min-det-org det-org
 482                        min-freq freq
 483                        d-i i
 484                        d-j j
 485                        dest (cons (cdr ret) freq))
 486                  )
 487                 ((= max-sim sim)
 488                  (cond ((> min-det-ret det-ret)
 489                         (setq min-det-ret det-ret
 490                               min-det-org det-org
 491                               min-freq freq
 492                               d-i i
 493                               d-j j
 494                               dest (cons (cdr ret) freq))
 495                         )
 496                        ((= min-det-ret det-ret)
 497                         (cond ((> min-det-org det-org)
 498                                (setq min-det-org det-org
 499                                      min-freq freq
 500                                      d-i i
 501                                      d-j j
 502                                      dest (cons (cdr ret) freq))
 503                                )
 504                               ((= min-det-org det-org)
 505                                (cond ((> min-freq freq)
 506                                       (setq min-freq freq
 507                                             d-i i
 508                                             d-j j
 509                                             dest (cons (cdr ret) freq))
 510                                       ))
 511                                ))
 512                         ))
 513                  ))
 514           )
 515         (setq jr (cdr jr)
 516               j (1+ j)))
 517       (setq ir (cdr ir)
 518             i (1+ i)))
 519     (if (> d-i d-j)
 520         (setq i d-i
 521               d-i d-j
 522               d-j i))
 523     (setq jr (nthcdr (1- d-j) situation-examples))
 524     (setcdr jr (cddr jr))
 525     (if (= d-i 0)
 526         (setq situation-examples
 527               (cdr situation-examples))
 528       (setq ir (nthcdr (1- d-i) situation-examples))
 529       (setcdr ir (cddr ir))
 530       )
 531     (if (setq ir (assoc (car dest) situation-examples))
 532         (progn
 533           (setcdr ir (+ (cdr ir)(cdr dest)))
 534           situation-examples)
 535       (cons dest situation-examples)
 536       ;; situation-examples may be modified.
 537       )))
 538
 539
 540 ;;; @ presentation of preview
 541 ;;;
 542
 543 ;;; @@ entity-button
 544 ;;;
 545
 546 ;;; @@@ predicate function
 547 ;;;
 548
 549 ;; (defun mime-view-entity-button-visible-p (entity)
 550 ;;   "Return non-nil if header of ENTITY is visible.
 551 ;; Please redefine this function if you want to change default setting."
 552 ;;   (let ((media-type (mime-entity-media-type entity))
 553 ;;         (media-subtype (mime-entity-media-subtype entity)))
 554 ;;     (or (not (eq media-type 'application))
 555 ;;         (and (not (eq media-subtype 'x-selection))
 556 ;;              (or (not (eq media-subtype 'octet-stream))
 557 ;;                  (let ((mother-entity (mime-entity-parent entity)))
 558 ;;                    (or (not (eq (mime-entity-media-type mother-entity)
 559 ;;                                 'multipart))
 560 ;;                        (not (eq (mime-entity-media-subtype mother-entity)
 561 ;;                                 'encrypted)))
 562 ;;                    )
 563 ;;                  )))))
 564
 565 ;;; @@@ entity button generator
 566 ;;;
 567
 568 (defun mime-view-insert-entity-button (entity)
 569   "Insert entity-button of ENTITY."
 570   (let ((entity-node-id (mime-entity-node-id entity))
 571         (params (mime-entity-parameters entity))
 572         (subject (mime-view-entity-title entity)))
 573     (mime-insert-button
 574      (let ((access-type (assoc "access-type" params))
 575            (num (or (cdr (assoc "x-part-number" params))
 576                     (if (consp entity-node-id)
 577                         (mapconcat (function
 578                                     (lambda (num)
 579                                       (format "%s" (1+ num))
 580                                       ))
 581                                    (reverse entity-node-id) ".")
 582                       "0"))
 583                 ))
 584        (cond (access-type
 585               (let ((server (assoc "server" params)))
 586                 (setq access-type (cdr access-type))
 587                 (if server
 588                     (format "%s %s ([%s] %s)"
 589                             num subject access-type (cdr server))
 590                 (let ((site (cdr (assoc "site" params)))
 591                       (dir (cdr (assoc "directory" params)))
 592                       (url (cdr (assoc "url" params)))
 593                       )
 594                   (if url
 595                       (format "%s %s ([%s] %s)"
 596                               num subject access-type url)
 597                     (format "%s %s ([%s] %s:%s)"
 598                             num subject access-type site dir))
 599                   )))
 600             )
 601            (t
 602             (let* ((charset (cdr (assoc "charset" params)))
 603                    (encoding (mime-entity-encoding entity))
 604                    (rest (format " <%s/%s%s%s>"
 605                                  (mime-entity-media-type entity)
 606                                  (mime-entity-media-subtype entity)
 607                                  (if charset
 608                                      (concat "; " charset)
 609                                    "")
 610                                  (if encoding
 611                                      (concat " (" encoding ")")
 612                                    ""))))
 613               (concat
 614                num " " subject
 615                (if (>= (+ (current-column)(length rest))(window-width))
 616                    "\n\t")
 617                rest))
 618             )))
 619      (function mime-preview-play-current-entity))
 620     ))
 621
 622
 623 ;;; @@ entity-header
 624 ;;;
 625
 626 (defvar mime-header-presentation-method-alist nil
 627   "Alist of major mode vs. corresponding header-presentation-method functions.
 628 Each element looks like (SYMBOL . FUNCTION).
 629 SYMBOL must be major mode in raw-buffer or t.  t means default.
 630 Interface of FUNCTION must be (ENTITY SITUATION).")
 631
 632 (defvar mime-view-ignored-field-list
 633   '(".*Received:" ".*Path:" ".*Id:" "^References:"
 634     "^Replied:" "^Errors-To:"
 635     "^Lines:" "^Sender:" ".*Host:" "^Xref:"
 636     "^Content-Type:" "^Precedence:"
 637     "^Status:" "^X-VM-.*:")
 638   "All fields that match this list will be hidden in MIME preview buffer.
 639 Each elements are regexp of field-name.")
 640
 641 (defvar mime-view-visible-field-list '("^Dnas.*:" "^Message-Id:")
 642   "All fields that match this list will be displayed in MIME preview buffer.
 643 Each elements are regexp of field-name.")
 644
 645
 646 ;;; @@ entity-body
 647 ;;;
 648
 649 ;;; @@@ predicate function
 650 ;;;
 651
 652 (in-calist-package 'mime-view)
 653
 654 (defun mime-calist::field-match-method-as-default-rule (calist
 655                                                         field-type field-value)
 656   (let ((s-field (assq field-type calist)))
 657     (cond ((null s-field)
 658            (cons (cons field-type field-value) calist)
 659            )
 660           (t calist))))
 661
 662 (define-calist-field-match-method
 663   'header #'mime-calist::field-match-method-as-default-rule)
 664
 665 (define-calist-field-match-method
 666   'body #'mime-calist::field-match-method-as-default-rule)
 667
 668
 669 (defvar mime-preview-condition nil
 670   "Condition-tree about how to display entity.")
 671
 672 (ctree-set-calist-strictly
 673  'mime-preview-condition '((type . application)(subtype . octet-stream)
 674                            (encoding . nil)
 675                            (body . visible)))
 676 (ctree-set-calist-strictly
 677  'mime-preview-condition '((type . application)(subtype . octet-stream)
 678                            (encoding . "7bit")
 679                            (body . visible)))
 680 (ctree-set-calist-strictly
 681  'mime-preview-condition '((type . application)(subtype . octet-stream)
 682                            (encoding . "8bit")
 683                            (body . visible)))
 684
 685 (ctree-set-calist-strictly
 686  'mime-preview-condition '((type . application)(subtype . pgp)
 687                            (body . visible)))
 688
 689 (ctree-set-calist-strictly
 690  'mime-preview-condition '((type . application)(subtype . x-latex)
 691                            (body . visible)))
 692
 693 (ctree-set-calist-strictly
 694  'mime-preview-condition '((type . application)(subtype . x-selection)
 695                            (body . visible)))
 696
 697 (ctree-set-calist-strictly
 698  'mime-preview-condition '((type . application)(subtype . x-comment)
 699                            (body . visible)))
 700
 701 (ctree-set-calist-strictly
 702  'mime-preview-condition '((type . message)(subtype . delivery-status)
 703                            (body . visible)))
 704
 705 (ctree-set-calist-strictly
 706  'mime-preview-condition
 707  '((body . visible)
 708    (body-presentation-method . mime-display-text/plain)))
 709
 710 (ctree-set-calist-strictly
 711  'mime-preview-condition
 712  '((type . nil)
 713    (body . visible)
 714    (body-presentation-method . mime-display-text/plain)))
 715
 716 (ctree-set-calist-strictly
 717  'mime-preview-condition
 718  '((type . text)(subtype . enriched)
 719    (body . visible)
 720    (body-presentation-method . mime-display-text/enriched)))
 721
 722 (ctree-set-calist-strictly
 723  'mime-preview-condition
 724  '((type . text)(subtype . richtext)
 725    (body . visible)
 726    (body-presentation-method . mime-display-text/richtext)))
 727
 728 (autoload 'mime-display-application/x-postpet "postpet")
 729
 730 (ctree-set-calist-strictly
 731  'mime-preview-condition
 732  '((type . application)(subtype . x-postpet)
 733    (body . visible)
 734    (body-presentation-method . mime-display-application/x-postpet)))
 735
 736 (ctree-set-calist-strictly
 737  'mime-preview-condition
 738  '((type . text)(subtype . t)
 739    (body . visible)
 740    (body-presentation-method . mime-display-text/plain)))
 741
 742 (ctree-set-calist-strictly
 743  'mime-preview-condition
 744  '((type . multipart)(subtype . alternative)
 745    (body . visible)
 746    (body-presentation-method . mime-display-multipart/alternative)))
 747
 748 (ctree-set-calist-strictly
 749  'mime-preview-condition
 750  '((type . multipart)(subtype . related)
 751    (body . visible)
 752    (body-presentation-method . mime-display-multipart/related)))
 753
 754 (ctree-set-calist-strictly
 755  'mime-preview-condition
 756  '((type . multipart)(subtype . t)
 757    (body . visible)
 758    (body-presentation-method . mime-display-multipart/mixed)))
 759
 760 (ctree-set-calist-strictly
 761  'mime-preview-condition
 762  '((type . message)(subtype . partial)
 763    (body . visible)
 764    (body-presentation-method . mime-display-message/partial-button)))
 765
 766 (ctree-set-calist-strictly
 767  'mime-preview-condition
 768  '((type . message)(subtype . rfc822)
 769    (body . visible)
 770    (body-presentation-method . mime-display-multipart/mixed)
 771    (childrens-situation (header . visible)
 772                         (entity-button . invisible))))
 773
 774 (ctree-set-calist-strictly
 775  'mime-preview-condition
 776  '((type . message)(subtype . news)
 777    (body . visible)
 778    (body-presentation-method . mime-display-multipart/mixed)
 779    (childrens-situation (header . visible)
 780                         (entity-button . invisible))))
 781
 782
 783 ;;; @@@ entity presentation
 784 ;;;
 785
 786 (defun mime-display-text/plain (entity situation)
 787   (save-restriction
 788     (narrow-to-region (point-max)(point-max))
 789     (condition-case nil
 790         (mime-insert-text-content entity)
 791       (error (progn
 792                (message "Can't decode current entity.")
 793                (sit-for 1))))
 794     (run-hooks 'mime-text-decode-hook)
 795     (goto-char (point-max))
 796     (if (not (eq (char-after (1- (point))) ?\n))
 797         (insert "\n")
 798       )
 799     (mime-add-url-buttons)
 800     (run-hooks 'mime-display-text/plain-hook)
 801     ))
 802
 803 (defun mime-display-text/richtext (entity situation)
 804   (save-restriction
 805     (narrow-to-region (point-max)(point-max))
 806     (mime-insert-text-content entity)
 807     (run-hooks 'mime-text-decode-hook)
 808     (let ((beg (point-min))
 809           (adaptive-fill-mode nil))
 810       (remove-text-properties beg (point-max) '(face nil))
 811       (richtext-decode beg (point-max))
 812       )))
 813
 814 (defun mime-display-text/enriched (entity situation)
 815   (save-restriction
 816     (narrow-to-region (point-max)(point-max))
 817     (mime-insert-text-content entity)
 818     (run-hooks 'mime-text-decode-hook)
 819     (let ((beg (point-min))
 820           (adaptive-fill-mode nil))
 821       (remove-text-properties beg (point-max) '(face nil))
 822       (enriched-decode beg (point-max))
 823       )))
 824
 825
 826 (defvar mime-view-announcement-for-message/partial
 827   (if (and (>= emacs-major-version 19) window-system)
 828       "\
 829 \[[ This is message/partial style split message. ]]
 830 \[[ Please press `v' key in this buffer          ]]
 831 \[[ or click here by mouse button-2.             ]]"
 832     "\
 833 \[[ This is message/partial style split message. ]]
 834 \[[ Please press `v' key in this buffer.         ]]"
 835     ))
 836
 837 (defun mime-display-message/partial-button (&optional entity situation)
 838   (save-restriction
 839     (goto-char (point-max))
 840     (if (not (search-backward "\n\n" nil t))
 841         (insert "\n")
 842       )
 843     (goto-char (point-max))
 844     (narrow-to-region (point-max)(point-max))
 845     (insert mime-view-announcement-for-message/partial)
 846     (mime-add-button (point-min)(point-max)
 847                      #'mime-preview-play-current-entity)
 848     ))
 849
 850 (defun mime-display-multipart/mixed (entity situation)
 851   (let ((children (mime-entity-children entity))
 852         (original-major-mode-cell (assq 'major-mode situation))
 853         (default-situation
 854           (cdr (assq 'childrens-situation situation))))
 855     (if original-major-mode-cell
 856         (setq default-situation
 857               (cons original-major-mode-cell default-situation)))
 858     (while children
 859       (mime-display-entity (car children) nil default-situation)
 860       (setq children (cdr children))
 861       )))
 862
 863 (defcustom mime-view-type-subtype-score-alist
 864   '(((text . enriched) . 3)
 865     ((text . richtext) . 2)
 866     ((text . plain)    . 1)
 867     (t . 0))
 868   "Alist MEDIA-TYPE vs corresponding score.
 869 MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t.  t means default."
 870   :group 'mime-view
 871   :type '(repeat (cons (choice :tag "Media-Type"
 872                                (cons :tag "Type/Subtype"
 873                                      (symbol :tag "Primary-type")
 874                                      (symbol :tag "Subtype"))
 875                                (symbol :tag "Type")
 876                                (const :tag "Default" t))
 877                        integer)))
 878
 879 (defun mime-display-multipart/alternative (entity situation)
 880   (let* ((children (mime-entity-children entity))
 881          (original-major-mode-cell (assq 'major-mode situation))
 882          (default-situation
 883            (cdr (assq 'childrens-situation situation)))
 884          (i 0)
 885          (p 0)
 886          (max-score 0)
 887          situations)
 888     (if original-major-mode-cell
 889         (setq default-situation
 890               (cons original-major-mode-cell default-situation)))
 891     (setq situations
 892           (mapcar (function
 893                    (lambda (child)
 894                      (let ((situation
 895                             (mime-find-entity-preview-situation
 896                              child default-situation)))
 897                        (if (cdr (assq 'body-presentation-method situation))
 898                            (let ((score
 899                                   (cdr
 900                                    (or (assoc
 901                                         (cons
 902                                          (cdr (assq 'type situation))
 903                                          (cdr (assq 'subtype situation)))
 904                                         mime-view-type-subtype-score-alist)
 905                                        (assq
 906                                         (cdr (assq 'type situation))
 907                                         mime-view-type-subtype-score-alist)
 908                                        (assq
 909                                         t
 910                                         mime-view-type-subtype-score-alist)
 911                                        ))))
 912                              (if (> score max-score)
 913                                  (setq p i
 914                                        max-score score)
 915                                )))
 916                        (setq i (1+ i))
 917                        situation)
 918                      ))
 919                   children))
 920     (setq i 0)
 921     (while children
 922       (let ((child (car children))
 923             (situation (car situations)))
 924         (mime-display-entity child (if (= i p)
 925                                        situation
 926                                      (put-alist 'body 'invisible
 927                                                 (copy-alist situation)))))
 928       (setq children (cdr children)
 929             situations (cdr situations)
 930             i (1+ i)))))
 931
 932 (defun mime-display-multipart/related (entity situation)
 933   (let* ((param-start (mime-parse-msg-id
 934                        (std11-lexical-analyze
 935                         (cdr (assoc "start"
 936                                     (mime-content-type-parameters
 937                                      (mime-entity-content-type entity)))))))
 938          (start (or (and param-start (mime-find-entity-from-content-id
 939                                       param-start
 940                                       entity))
 941                     (car (mime-entity-children entity))))
 942          (original-major-mode-cell (assq 'major-mode situation))
 943          (default-situation (cdr (assq 'childrens-situation situation))))
 944     (when start
 945       (if original-major-mode-cell
 946           (setq default-situation
 947                 (cons original-major-mode-cell default-situation)))
 948       (mime-display-entity start nil default-situation))))
 949
 950 ;;; @ acting-condition
 951 ;;;
 952
 953 (defvar mime-acting-condition nil
 954   "Condition-tree about how to process entity.")
 955
 956 (defun mime-view-read-mailcap-files (&optional files)
 957   (or files
 958       (setq files mime-view-mailcap-files))
 959   (let (entries file)
 960     (while files
 961       (setq file (car files))
 962       (if (file-readable-p file)
 963           (setq entries (append entries (mime-parse-mailcap-file file))))
 964       (setq files (cdr files)))
 965     (while entries
 966       (let ((entry (car entries))
 967             view print shared)
 968         (while entry
 969           (let* ((field (car entry))
 970                  (field-type (car field)))
 971             (cond ((eq field-type 'view)  (setq view field))
 972                   ((eq field-type 'print) (setq print field))
 973                   ((memq field-type '(compose composetyped edit)))
 974                   (t (setq shared (cons field shared))))
 975             )
 976           (setq entry (cdr entry)))
 977         (setq shared (nreverse shared))
 978         (ctree-set-calist-with-default
 979          'mime-acting-condition
 980          (append shared (list '(mode . "play")(cons 'method (cdr view)))))
 981         (if print
 982             (ctree-set-calist-with-default
 983              'mime-acting-condition
 984              (append shared
 985                      (list '(mode . "print")(cons 'method (cdr view)))))))
 986       (setq entries (cdr entries)))))
 987
 988 (mime-view-read-mailcap-files)
 989
 990 (ctree-set-calist-strictly
 991  'mime-acting-condition
 992  '((type . application)(subtype . octet-stream)
 993    (mode . "play")
 994    (method . mime-detect-content)
 995    ))
 996
 997 (ctree-set-calist-with-default
 998  'mime-acting-condition
 999  '((mode . "extract")
1000    (method . mime-save-content)))
1001
1002 (ctree-set-calist-strictly
1003  'mime-acting-condition
1004  '((type . text)(subtype . x-rot13-47)(mode . "play")
1005    (method . mime-view-caesar)
1006    ))
1007 (ctree-set-calist-strictly
1008  'mime-acting-condition
1009  '((type . text)(subtype . x-rot13-47-48)(mode . "play")
1010    (method . mime-view-caesar)
1011    ))
1012
1013 (ctree-set-calist-strictly
1014  'mime-acting-condition
1015  '((type . message)(subtype . rfc822)(mode . "play")
1016    (method . mime-view-message/rfc822)
1017    ))
1018 (ctree-set-calist-strictly
1019  'mime-acting-condition
1020  '((type . message)(subtype . partial)(mode . "play")
1021    (method . mime-store-message/partial-piece)
1022    ))
1023
1024 (ctree-set-calist-strictly
1025  'mime-acting-condition
1026  '((type . message)(subtype . external-body)
1027    ("access-type" . "anon-ftp")
1028    (method . mime-view-message/external-anon-ftp)
1029    ))
1030
1031 (ctree-set-calist-strictly
1032  'mime-acting-condition
1033  '((type . message)(subtype . external-body)
1034    ("access-type" . "url")
1035    (method . mime-view-message/external-url)
1036    ))
1037
1038 (ctree-set-calist-strictly
1039  'mime-acting-condition
1040  '((type . application)(subtype . octet-stream)
1041    (method . mime-save-content)
1042    ))
1043
1044
1045 ;;; @ quitting method
1046 ;;;
1047
1048 (defvar mime-preview-quitting-method-alist
1049   '((mime-show-message-mode
1050      . mime-preview-quitting-method-for-mime-show-message-mode))
1051   "Alist of major-mode vs. quitting-method of mime-view.")
1052
1053 (defvar mime-preview-over-to-previous-method-alist nil
1054   "Alist of major-mode vs. over-to-previous-method of mime-view.")
1055
1056 (defvar mime-preview-over-to-next-method-alist nil
1057   "Alist of major-mode vs. over-to-next-method of mime-view.")
1058
1059
1060 ;;; @ following method
1061 ;;;
1062
1063 (defvar mime-preview-following-method-alist nil
1064   "Alist of major-mode vs. following-method of mime-view.")
1065
1066 (defvar mime-view-following-required-fields-list
1067   '("From"))
1068
1069
1070 ;;; @ buffer setup
1071 ;;;
1072
1073 (defun mime-display-entity (entity &optional situation
1074                                    default-situation preview-buffer)
1075   (or preview-buffer
1076       (setq preview-buffer (current-buffer)))
1077   (let* (e nb ne nhb nbb)
1078     (in-calist-package 'mime-view)
1079     (or situation
1080         (setq situation
1081               (mime-find-entity-preview-situation entity default-situation)))
1082     (let ((button-is-invisible
1083            (eq (cdr (or (assq '*entity-button situation)
1084                         (assq 'entity-button situation)))
1085                'invisible))
1086           (header-is-visible
1087            (eq (cdr (or (assq '*header situation)
1088                         (assq 'header situation)))
1089                'visible))
1090           (body-is-visible
1091            (eq (cdr (or (assq '*body situation)
1092                         (assq 'body situation)))
1093                'visible))
1094           (children (mime-entity-children entity)))
1095       (set-buffer preview-buffer)
1096       (setq nb (point))
1097       (narrow-to-region nb nb)
1098       (or button-is-invisible
1099           ;; (if (mime-view-entity-button-visible-p entity)
1100           (mime-view-insert-entity-button entity)
1101           ;;   )
1102           )
1103       (if header-is-visible
1104           (let ((header-presentation-method
1105                  (or (cdr (assq 'header-presentation-method situation))
1106                      (cdr (assq (cdr (assq 'major-mode situation))
1107                                 mime-header-presentation-method-alist)))))
1108             (setq nhb (point))
1109             (if header-presentation-method
1110                 (funcall header-presentation-method entity situation)
1111               (mime-insert-header entity
1112                                   mime-view-ignored-field-list
1113                                   mime-view-visible-field-list))
1114             (run-hooks 'mime-display-header-hook)
1115             (put-text-property nhb (point-max) 'mime-view-entity-header entity)
1116             (goto-char (point-max))
1117             (insert "\n")))
1118       (setq nbb (point))
1119       (unless children
1120         (if body-is-visible
1121             (let ((body-presentation-method
1122                    (cdr (assq 'body-presentation-method situation))))
1123               (if (functionp body-presentation-method)
1124                   (funcall body-presentation-method entity situation)
1125                 (mime-display-text/plain entity situation)))
1126           (when button-is-invisible
1127             (goto-char (point-max))
1128             (mime-view-insert-entity-button entity)
1129             )
1130           (unless header-is-visible
1131             (goto-char (point-max))
1132             (insert "\n"))
1133           ))
1134       (setq ne (point-max))
1135       (widen)
1136       (put-text-property nb ne 'mime-view-entity entity)
1137       (put-text-property nb ne 'mime-view-situation situation)
1138       (put-text-property nbb ne 'mime-view-entity-body entity)
1139       (goto-char ne)
1140       (if (and children body-is-visible)
1141           (let ((body-presentation-method
1142                  (cdr (assq 'body-presentation-method situation))))
1143             (if (functionp body-presentation-method)
1144                 (funcall body-presentation-method entity situation)
1145               (mime-display-multipart/mixed entity situation))))
1146       )))
1147
1148
1149 ;;; @ MIME viewer mode
1150 ;;;
1151
1152 (defconst mime-view-menu-title "MIME-View")
1153 (defconst mime-view-menu-list
1154   '((up          "Move to upper entity"    mime-preview-move-to-upper)
1155     (previous    "Move to previous entity" mime-preview-move-to-previous)
1156     (next        "Move to next entity"     mime-preview-move-to-next)
1157     (scroll-down "Scroll-down"             mime-preview-scroll-down-entity)
1158     (scroll-up   "Scroll-up"               mime-preview-scroll-up-entity)
1159     (play        "Play current entity"     mime-preview-play-current-entity)
1160     (extract     "Extract current entity"  mime-preview-extract-current-entity)
1161     (print       "Print current entity"    mime-preview-print-current-entity)
1162     )
1163   "Menu for MIME Viewer")
1164
1165 (cond ((featurep 'xemacs)
1166        (defvar mime-view-xemacs-popup-menu
1167          (cons mime-view-menu-title
1168                (mapcar (function
1169                         (lambda (item)
1170                           (vector (nth 1 item)(nth 2 item) t)
1171                           ))
1172                        mime-view-menu-list)))
1173        (defun mime-view-xemacs-popup-menu (event)
1174          "Popup the menu in the MIME Viewer buffer"
1175          (interactive "e")
1176          (select-window (event-window event))
1177          (set-buffer (event-buffer event))
1178          (popup-menu 'mime-view-xemacs-popup-menu))
1179        (defvar mouse-button-2 'button2)
1180        (defvar mouse-button-3 'button3)
1181        )
1182       (t
1183        (defvar mime-view-popup-menu
1184          (let ((menu (make-sparse-keymap mime-view-menu-title)))
1185            (nconc menu
1186                   (mapcar (function
1187                            (lambda (item)
1188                              (list (intern (nth 1 item)) 'menu-item
1189                                    (nth 1 item)(nth 2 item))
1190                              ))
1191                           mime-view-menu-list))))
1192        (defun mime-view-popup-menu (event)
1193          "Popup the menu in the MIME Viewer buffer"
1194          (interactive "@e")
1195          (let ((menu mime-view-popup-menu) events func)
1196            (setq events (x-popup-menu t menu))
1197            (and events
1198                 (setq func (lookup-key menu (apply #'vector events)))
1199                 (commandp func)
1200                 (funcall func))))
1201        (defvar mouse-button-2 [mouse-2])
1202        (defvar mouse-button-3 [mouse-3])
1203        ))
1204
1205 (defun mime-view-define-keymap (&optional default)
1206   (let ((mime-view-mode-map (if (keymapp default)
1207                                 (copy-keymap default)
1208                               (make-sparse-keymap))))
1209     (define-key mime-view-mode-map
1210       "u"        (function mime-preview-move-to-upper))
1211     (define-key mime-view-mode-map
1212       "p"        (function mime-preview-move-to-previous))
1213     (define-key mime-view-mode-map
1214       "n"        (function mime-preview-move-to-next))
1215     (define-key mime-view-mode-map
1216       "\e\t"     (function mime-preview-move-to-previous))
1217     (define-key mime-view-mode-map
1218       "\t"       (function mime-preview-move-to-next))
1219     (define-key mime-view-mode-map
1220       " "        (function mime-preview-scroll-up-entity))
1221     (define-key mime-view-mode-map
1222       "\M- "     (function mime-preview-scroll-down-entity))
1223     (define-key mime-view-mode-map
1224       "\177"     (function mime-preview-scroll-down-entity))
1225     (define-key mime-view-mode-map
1226       "\C-m"     (function mime-preview-next-line-entity))
1227     (define-key mime-view-mode-map
1228       "\C-\M-m"  (function mime-preview-previous-line-entity))
1229     (define-key mime-view-mode-map
1230       "v"        (function mime-preview-play-current-entity))
1231     (define-key mime-view-mode-map
1232       "e"        (function mime-preview-extract-current-entity))
1233     (define-key mime-view-mode-map
1234       "\C-c\C-p" (function mime-preview-print-current-entity))
1235
1236     (define-key mime-view-mode-map
1237       "\C-c\C-t\C-f" (function mime-preview-toggle-header))
1238     (define-key mime-view-mode-map
1239       "\C-c\C-th" (function mime-preview-toggle-header))
1240     (define-key mime-view-mode-map
1241       "\C-c\C-t\C-c" (function mime-preview-toggle-content))
1242
1243     (define-key mime-view-mode-map
1244       "\C-c\C-v\C-f" (function mime-preview-show-header))
1245     (define-key mime-view-mode-map
1246       "\C-c\C-vh" (function mime-preview-show-header))
1247     (define-key mime-view-mode-map
1248       "\C-c\C-v\C-c" (function mime-preview-show-content))
1249
1250     (define-key mime-view-mode-map
1251       "\C-c\C-d\C-f" (function mime-preview-hide-header))
1252     (define-key mime-view-mode-map
1253       "\C-c\C-dh" (function mime-preview-hide-header))
1254     (define-key mime-view-mode-map
1255       "\C-c\C-d\C-c" (function mime-preview-hide-content))
1256
1257     (define-key mime-view-mode-map
1258       "a"        (function mime-preview-follow-current-entity))
1259     (define-key mime-view-mode-map
1260       "q"        (function mime-preview-quit))
1261     (define-key mime-view-mode-map
1262       "\C-c\C-x" (function mime-preview-kill-buffer))
1263     ;; (define-key mime-view-mode-map
1264     ;;   "<"        (function beginning-of-buffer))
1265     ;; (define-key mime-view-mode-map
1266     ;;   ">"        (function end-of-buffer))
1267     (define-key mime-view-mode-map
1268       "?"        (function describe-mode))
1269     (define-key mime-view-mode-map
1270       [tab] (function mime-preview-move-to-next))
1271     (define-key mime-view-mode-map
1272       [delete] (function mime-preview-scroll-down-entity))
1273     (define-key mime-view-mode-map
1274       [backspace] (function mime-preview-scroll-down-entity))
1275     (if (functionp default)
1276         (cond ((featurep 'xemacs)
1277                (set-keymap-default-binding mime-view-mode-map default)
1278                )
1279               (t
1280                (setq mime-view-mode-map
1281                      (append mime-view-mode-map (list (cons t default))))
1282                )))
1283     (if mouse-button-2
1284         (define-key mime-view-mode-map
1285           mouse-button-2 (function mime-button-dispatcher))
1286       )
1287     (cond ((featurep 'xemacs)
1288            (define-key mime-view-mode-map
1289              mouse-button-3 (function mime-view-xemacs-popup-menu))
1290            )
1291           ((>= emacs-major-version 19)
1292            (define-key mime-view-mode-map
1293              mouse-button-3 (function mime-view-popup-menu))
1294            (define-key mime-view-mode-map [menu-bar mime-view]
1295              (cons mime-view-menu-title
1296                    (make-sparse-keymap mime-view-menu-title)))
1297            (mapcar (function
1298                     (lambda (item)
1299                       (define-key mime-view-mode-map
1300                         (vector 'menu-bar 'mime-view (car item))
1301                         (cons (nth 1 item)(nth 2 item)))
1302                       ))
1303                    (reverse mime-view-menu-list))
1304            ))
1305     ;; (run-hooks 'mime-view-define-keymap-hook)
1306     mime-view-mode-map))
1307
1308 (defvar mime-view-mode-default-map (mime-view-define-keymap))
1309
1310
1311 (defsubst mime-maybe-hide-echo-buffer ()
1312   "Clear mime-echo buffer and delete window for it."
1313   (let ((buf (get-buffer mime-echo-buffer-name)))
1314     (if buf
1315         (save-excursion
1316           (set-buffer buf)
1317           (erase-buffer)
1318           (let ((win (get-buffer-window buf)))
1319             (if win
1320                 (delete-window win)
1321               ))
1322           (bury-buffer buf)
1323           ))))
1324
1325 (defvar mime-view-redisplay nil)
1326
1327 ;;;###autoload
1328 (defun mime-display-message (message &optional preview-buffer
1329                                      mother default-keymap-or-function
1330                                      original-major-mode keymap)
1331   "View MESSAGE in MIME-View mode.
1332
1333 Optional argument PREVIEW-BUFFER specifies the buffer of the
1334 presentation.  It must be either nil or a name of preview buffer.
1335
1336 Optional argument MOTHER specifies mother-buffer of the preview-buffer.
1337
1338 Optional argument DEFAULT-KEYMAP-OR-FUNCTION is nil, keymap or
1339 function.  If it is a keymap, keymap of MIME-View mode will be added
1340 to it.  If it is a function, it will be bound as default binding of
1341 keymap of MIME-View mode.
1342
1343 Optional argument ORIGINAL-MAJOR-MODE is major-mode of representation
1344 buffer of MESSAGE.  If it is nil, current `major-mode' is used.
1345
1346 Optional argument KEYMAP is keymap of MIME-View mode.  If it is
1347 non-nil, DEFAULT-KEYMAP-OR-FUNCTION is ignored.  If it is nil,
1348 `mime-view-mode-default-map' is used."
1349   (mime-maybe-hide-echo-buffer)
1350   (let ((win-conf (current-window-configuration)))
1351     (or preview-buffer
1352         (setq preview-buffer
1353               (concat "*Preview-" (mime-entity-name message) "*")))
1354     (or original-major-mode
1355         (setq original-major-mode major-mode))
1356     (let ((inhibit-read-only t))
1357       (set-buffer (get-buffer-create preview-buffer))
1358       (widen)
1359       (erase-buffer)
1360       (if mother
1361           (setq mime-mother-buffer mother))
1362       (setq mime-preview-original-window-configuration win-conf)
1363       (setq major-mode 'mime-view-mode)
1364       (setq mode-name "MIME-View")
1365       (mime-display-entity message nil
1366                            `((entity-button . invisible)
1367                              (header . visible)
1368                              (major-mode . ,original-major-mode))
1369                            preview-buffer)
1370       (use-local-map
1371        (or keymap
1372            (if default-keymap-or-function
1373                (mime-view-define-keymap default-keymap-or-function)
1374              mime-view-mode-default-map)))
1375       (let ((point
1376              (next-single-property-change (point-min) 'mime-view-entity)))
1377         (if point
1378             (goto-char point)
1379           (goto-char (point-min))
1380           (search-forward "\n\n" nil t)))
1381       (run-hooks 'mime-view-mode-hook)
1382       (set-buffer-modified-p nil)
1383       (setq buffer-read-only t)
1384       preview-buffer)))
1385
1386 ;;;###autoload
1387 (defun mime-view-buffer (&optional raw-buffer preview-buffer mother
1388                                    default-keymap-or-function
1389                                    representation-type)
1390   "View RAW-BUFFER in MIME-View mode.
1391 Optional argument PREVIEW-BUFFER is either nil or a name of preview
1392 buffer.
1393 Optional argument DEFAULT-KEYMAP-OR-FUNCTION is nil, keymap or
1394 function.  If it is a keymap, keymap of MIME-View mode will be added
1395 to it.  If it is a function, it will be bound as default binding of
1396 keymap of MIME-View mode.
1397 Optional argument REPRESENTATION-TYPE is representation-type of
1398 message.  It must be nil, `binary' or `cooked'.  If it is nil,
1399 `cooked' is used as default."
1400   (interactive)
1401   (or raw-buffer
1402       (setq raw-buffer (current-buffer)))
1403   (or representation-type
1404       (setq representation-type
1405             (save-excursion
1406               (set-buffer raw-buffer)
1407               (cdr (or (assq major-mode mime-raw-representation-type-alist)
1408                        (assq t mime-raw-representation-type-alist)))
1409               )))
1410   (if (eq representation-type 'binary)
1411       (setq representation-type 'buffer)
1412     )
1413   (setq preview-buffer (mime-display-message
1414                         (mime-open-entity representation-type raw-buffer)
1415                         preview-buffer mother default-keymap-or-function))
1416   (or (get-buffer-window preview-buffer)
1417       (let ((r-win (get-buffer-window raw-buffer)))
1418         (if r-win
1419             (set-window-buffer r-win preview-buffer)
1420           (let ((m-win (and mother (get-buffer-window mother))))
1421             (if m-win
1422                 (set-window-buffer m-win preview-buffer)
1423               (switch-to-buffer preview-buffer)
1424               ))))))
1425
1426 (defun mime-view-mode (&optional mother ctl encoding
1427                                  raw-buffer preview-buffer
1428                                  default-keymap-or-function)
1429   "Major mode for viewing MIME message.
1430
1431 Here is a list of the standard keys for mime-view-mode.
1432
1433 key             feature
1434 ---             -------
1435
1436 u               Move to upper content
1437 p or M-TAB      Move to previous content
1438 n or TAB        Move to next content
1439 SPC             Scroll up or move to next content
1440 M-SPC or DEL    Scroll down or move to previous content
1441 RET             Move to next line
1442 M-RET           Move to previous line
1443 v               Decode current content as `play mode'
1444 e               Decode current content as `extract mode'
1445 C-c C-p         Decode current content as `print mode'
1446 a               Followup to current content.
1447 q               Quit
1448 button-2        Move to point under the mouse cursor
1449                 and decode current content as `play mode'
1450 "
1451   (interactive)
1452   (unless mime-view-redisplay
1453     (save-excursion
1454       (if raw-buffer (set-buffer raw-buffer))
1455       (let ((type
1456              (cdr
1457               (or (assq major-mode mime-raw-representation-type-alist)
1458                   (assq t mime-raw-representation-type-alist)))))
1459         (if (eq type 'binary)
1460             (setq type 'buffer)
1461           )
1462         (setq mime-message-structure (mime-open-entity type raw-buffer))
1463         (or (mime-entity-content-type mime-message-structure)
1464             (mime-entity-set-content-type mime-message-structure ctl))
1465         )
1466       (or (mime-entity-encoding mime-message-structure)
1467           (mime-entity-set-encoding mime-message-structure encoding))
1468       ))
1469   (mime-display-message mime-message-structure preview-buffer
1470                         mother default-keymap-or-function)
1471   )
1472
1473
1474 ;;; @@ utility
1475 ;;;
1476
1477 (defun mime-preview-find-boundary-info (&optional with-children)
1478   "Return boundary information of current part.
1479 If WITH-CHILDREN, refer boundary surrounding current part and its branches."
1480   (let (entity
1481         p-beg p-end
1482         entity-node-id len)
1483     (while (and
1484             (null (setq entity
1485                         (get-text-property (point) 'mime-view-entity)))
1486             (> (point) (point-min)))
1487       (backward-char))
1488     (setq p-beg (previous-single-property-change (point) 'mime-view-entity))
1489     (setq entity-node-id (and entity (mime-entity-node-id entity)))
1490     (setq len (length entity-node-id))
1491     (cond ((null p-beg)
1492            (setq p-beg
1493                  (if (eq (next-single-property-change (point-min)
1494                                                       'mime-view-entity)
1495                          (point))
1496                      (point)
1497                    (point-min)))
1498            )
1499           ((eq (next-single-property-change p-beg 'mime-view-entity)
1500                (point))
1501            (setq p-beg (point))
1502            ))
1503     (setq p-end (next-single-property-change p-beg 'mime-view-entity))
1504     (cond ((null p-end)
1505            (setq p-end (point-max))
1506            )
1507           ((null entity-node-id)
1508            (setq p-end (point-max))
1509            )
1510           (with-children
1511            (save-excursion
1512              (catch 'tag
1513                (let (e i)
1514                  (while (setq e
1515                               (next-single-property-change
1516                                (point) 'mime-view-entity))
1517                    (goto-char e)
1518                    (let ((rc (mime-entity-node-id
1519                               (get-text-property (point)
1520                                                  'mime-view-entity))))
1521                      (or (and (>= (setq i (- (length rc) len)) 0)
1522                               (equal entity-node-id (nthcdr i rc)))
1523                          (throw 'tag nil)))
1524                    (setq p-end (or (next-single-property-change
1525                                     (point) 'mime-view-entity)
1526                                    (point-max)))))
1527                (setq p-end (point-max))))
1528            ))
1529     (vector p-beg p-end entity)))
1530
1531
1532 ;;; @@ playing
1533 ;;;
1534
1535 (autoload 'mime-preview-play-current-entity "mime-play"
1536   "Play current entity." t)
1537
1538 (defun mime-preview-extract-current-entity (&optional ignore-examples)
1539   "Extract current entity into file (maybe).
1540 It decodes current entity to call internal or external method as
1541 \"extract\" mode.  The method is selected from variable
1542 `mime-acting-condition'."
1543   (interactive "P")
1544   (mime-preview-play-current-entity ignore-examples "extract")
1545   )
1546
1547 (defun mime-preview-print-current-entity (&optional ignore-examples)
1548   "Print current entity (maybe).
1549 It decodes current entity to call internal or external method as
1550 \"print\" mode.  The method is selected from variable
1551 `mime-acting-condition'."
1552   (interactive "P")
1553   (mime-preview-play-current-entity ignore-examples "print")
1554   )
1555
1556
1557 ;;; @@ following
1558 ;;;
1559
1560 (defun mime-preview-follow-current-entity ()
1561   "Write follow message to current entity.
1562 It calls following-method selected from variable
1563 `mime-preview-following-method-alist'."
1564   (interactive)
1565   (let* ((boundary-info (mime-preview-find-boundary-info t))
1566          (p-beg (aref boundary-info 0))
1567          (p-end (aref boundary-info 1))
1568          (entity (aref boundary-info 2))
1569          pb-beg)
1570     (if (or (get-text-property p-beg 'mime-view-entity-body)
1571             (null entity))
1572         (setq pb-beg p-beg)
1573       (setq pb-beg
1574             (next-single-property-change
1575              p-beg 'mime-view-entity-body nil
1576              (or (next-single-property-change p-beg 'mime-view-entity)
1577                  p-end))))
1578     (let* ((mode (mime-preview-original-major-mode 'recursive))
1579            (entity-node-id (and entity (mime-entity-node-id entity)))
1580            (new-name
1581             (format "%s-%s" (buffer-name) (reverse entity-node-id)))
1582            new-buf
1583            (the-buf (current-buffer))
1584            fields)
1585       (save-excursion
1586         (set-buffer (setq new-buf (get-buffer-create new-name)))
1587         (erase-buffer)
1588         (insert ?\n)
1589         (insert-buffer-substring the-buf pb-beg p-end)
1590         (goto-char (point-min))
1591         (let ((current-entity
1592                (if (and entity
1593                         (eq (mime-entity-media-type entity) 'message)
1594                         (eq (mime-entity-media-subtype entity) 'rfc822))
1595                    (car (mime-entity-children entity))
1596                  entity)))
1597           (while (and current-entity
1598                       (if (and (eq (mime-entity-media-type
1599                                     current-entity) 'message)
1600                                (eq (mime-entity-media-subtype
1601                                     current-entity) 'rfc822))
1602                           nil
1603                         (mime-insert-header current-entity fields)
1604                         t))
1605             (setq fields (std11-collect-field-names)
1606                   current-entity (mime-entity-parent current-entity))
1607             ))
1608         (let ((rest mime-view-following-required-fields-list)
1609               field-name ret)
1610           (while rest
1611             (setq field-name (car rest))
1612             (or (std11-field-body field-name)
1613                 (progn
1614                   (save-excursion
1615                     (set-buffer the-buf)
1616                     (let ((entity (when mime-mother-buffer
1617                                     (set-buffer mime-mother-buffer)
1618                                     (get-text-property (point)
1619                                                        'mime-view-entity))))
1620                       (while (and entity
1621                                   (null (setq ret (mime-entity-fetch-field
1622                                                    entity field-name))))
1623                         (setq entity (mime-entity-parent entity)))))
1624                   (if ret
1625                       (insert (concat field-name ": " ret "\n"))
1626                     )))
1627             (setq rest (cdr rest))
1628             ))
1629         )
1630       (let ((f (cdr (assq mode mime-preview-following-method-alist))))
1631         (if (functionp f)
1632             (funcall f new-buf)
1633           (message
1634            "Sorry, following method for %s is not implemented yet."
1635            mode)
1636           ))
1637       )))
1638
1639
1640 ;;; @@ moving
1641 ;;;
1642
1643 (defun mime-preview-move-to-upper ()
1644   "Move to upper entity.
1645 If there is no upper entity, call function `mime-preview-quit'."
1646   (interactive)
1647   (let (cinfo)
1648     (while (null (setq cinfo
1649                        (get-text-property (point) 'mime-view-entity)))
1650       (backward-char)
1651       )
1652     (let ((r (mime-entity-parent cinfo))
1653           point)
1654       (catch 'tag
1655         (while (setq point (previous-single-property-change
1656                             (point) 'mime-view-entity))
1657           (goto-char point)
1658           (when (eq r (get-text-property (point) 'mime-view-entity))
1659             (if (or (eq mime-preview-move-scroll t)
1660                     (and mime-preview-move-scroll
1661                          (>= point
1662                              (save-excursion
1663                                (move-to-window-line -1)
1664                                (forward-line (* -1 next-screen-context-lines))
1665                                (beginning-of-line)
1666                                (point)))))
1667                 (recenter next-screen-context-lines))
1668             (throw 'tag t)
1669             )
1670           )
1671         (mime-preview-quit)
1672         ))))
1673
1674 (defun mime-preview-move-to-previous ()
1675   "Move to previous entity.
1676 If there is no previous entity, it calls function registered in
1677 variable `mime-preview-over-to-previous-method-alist'."
1678   (interactive)
1679   (while (and (not (bobp))
1680               (null (get-text-property (point) 'mime-view-entity)))
1681     (backward-char)
1682     )
1683   (let ((point (previous-single-property-change (point) 'mime-view-entity)))
1684     (if (and point
1685              (>= point (point-min)))
1686         (if (get-text-property (1- point) 'mime-view-entity)
1687             (progn (goto-char point)
1688                    (if
1689                     (or (eq mime-preview-move-scroll t)
1690                         (and mime-preview-move-scroll
1691                              (<= point
1692                                 (save-excursion
1693                                   (move-to-window-line 0)
1694                                   (forward-line next-screen-context-lines)
1695                                   (end-of-line)
1696                                   (point)))))
1697                         (recenter (* -1 next-screen-context-lines))))
1698           (goto-char (1- point))
1699           (mime-preview-move-to-previous)
1700           )
1701       (let ((f (assq (mime-preview-original-major-mode)
1702                      mime-preview-over-to-previous-method-alist)))
1703         (if f
1704             (funcall (cdr f))
1705           ))
1706       )))
1707
1708 (defun mime-preview-move-to-next ()
1709   "Move to next entity.
1710 If there is no previous entity, it calls function registered in
1711 variable `mime-preview-over-to-next-method-alist'."
1712   (interactive)
1713   (while (and (not (eobp))
1714               (null (get-text-property (point) 'mime-view-entity)))
1715     (forward-char)
1716     )
1717   (let ((point (next-single-property-change (point) 'mime-view-entity)))
1718     (if (and point
1719              (<= point (point-max)))
1720         (progn
1721           (goto-char point)
1722           (if (null (get-text-property point 'mime-view-entity))
1723               (mime-preview-move-to-next)
1724             (and
1725              (or (eq mime-preview-move-scroll t)
1726                  (and mime-preview-move-scroll
1727                       (>= point
1728                          (save-excursion
1729                            (move-to-window-line -1)
1730                            (forward-line
1731                             (* -1 next-screen-context-lines))
1732                            (beginning-of-line)
1733                            (point)))))
1734                  (recenter next-screen-context-lines))
1735             ))
1736       (let ((f (assq (mime-preview-original-major-mode)
1737                      mime-preview-over-to-next-method-alist)))
1738         (if f
1739             (funcall (cdr f))
1740           ))
1741       )))
1742
1743 (defun mime-preview-scroll-up-entity (&optional h)
1744   "Scroll up current entity.
1745 If reached to (point-max), it calls function registered in variable
1746 `mime-preview-over-to-next-method-alist'."
1747   (interactive)
1748   (if (eobp)
1749       (let ((f (assq (mime-preview-original-major-mode)
1750                      mime-preview-over-to-next-method-alist)))
1751         (if f
1752             (funcall (cdr f))
1753           ))
1754     (let ((point
1755            (or (next-single-property-change (point) 'mime-view-entity)
1756                (point-max)))
1757           (bottom (window-end (selected-window))))
1758       (if (and (not h)
1759                (> bottom point))
1760           (progn (goto-char point)
1761                  (recenter next-screen-context-lines))
1762         (condition-case nil
1763             (scroll-up h)
1764           (end-of-buffer
1765            (goto-char (point-max)))))
1766       )))
1767
1768 (defun mime-preview-scroll-down-entity (&optional h)
1769   "Scroll down current entity.
1770 If reached to (point-min), it calls function registered in variable
1771 `mime-preview-over-to-previous-method-alist'."
1772   (interactive)
1773   (if (bobp)
1774       (let ((f (assq (mime-preview-original-major-mode)
1775                      mime-preview-over-to-previous-method-alist)))
1776         (if f
1777             (funcall (cdr f))
1778           ))
1779     (let ((point
1780            (or (previous-single-property-change (point) 'mime-view-entity)
1781                (point-min)))
1782           (top (window-start (selected-window))))
1783       (if (and (not h)
1784                (< top point))
1785           (progn (goto-char point)
1786                  (recenter (* -1 next-screen-context-lines)))
1787         (condition-case nil
1788             (scroll-down h)
1789           (beginning-of-buffer
1790            (goto-char (point-min)))))
1791       )))
1792
1793 (defun mime-preview-next-line-entity (&optional lines)
1794   "Scroll up one line (or prefix LINES lines).
1795 If LINES is negative, scroll down LINES lines."
1796   (interactive "p")
1797   (mime-preview-scroll-up-entity (or lines 1))
1798   )
1799
1800 (defun mime-preview-previous-line-entity (&optional lines)
1801   "Scrroll down one line (or prefix LINES lines).
1802 If LINES is negative, scroll up LINES lines."
1803   (interactive "p")
1804   (mime-preview-scroll-down-entity (or lines 1))
1805   )
1806
1807
1808 ;;; @@ display
1809 ;;;
1810
1811 (defun mime-preview-toggle-display (type &optional display)
1812   (let ((situation (mime-preview-find-boundary-info t))
1813         (sym (intern (concat "*" (symbol-name type))))
1814         entity p-beg p-end)
1815     (setq p-beg (aref situation 0)
1816           p-end (aref situation 1)
1817           entity (aref situation 2)
1818           situation (get-text-property p-beg 'mime-view-situation))
1819     (cond ((eq display 'invisible)
1820            (setq display nil))
1821           (display)
1822           (t
1823            (setq display
1824                  (memq (cdr (or (assq sym situation)
1825                                 (assq type situation)))
1826                        '(nil invisible)))))
1827     (setq situation (put-alist sym (if display
1828                                        'visible
1829                                      'invisible)
1830                                situation))
1831     (save-excursion
1832       (let ((inhibit-read-only t))
1833         (delete-region p-beg p-end)
1834         (mime-display-entity entity situation)))
1835     (let ((ret (assoc situation mime-preview-situation-example-list)))
1836       (if ret
1837           (setcdr ret (1+ (cdr ret)))
1838         (add-to-list 'mime-preview-situation-example-list
1839                      (cons situation 0))))))
1840
1841 (defun mime-preview-toggle-header (&optional force-visible)
1842   (interactive "P")
1843   (mime-preview-toggle-display 'header force-visible))
1844
1845 (defun mime-preview-toggle-content (&optional force-visible)
1846   (interactive "P")
1847   (mime-preview-toggle-display 'body force-visible))
1848
1849 (defun mime-preview-show-header ()
1850   (interactive)
1851   (mime-preview-toggle-display 'header 'visible))
1852
1853 (defun mime-preview-show-content ()
1854   (interactive)
1855   (mime-preview-toggle-display 'body 'visible))
1856
1857 (defun mime-preview-hide-header ()
1858   (interactive)
1859   (mime-preview-toggle-display 'header 'invisible))
1860
1861 (defun mime-preview-hide-content ()
1862   (interactive)
1863   (mime-preview-toggle-display 'body 'invisible))
1864
1865
1866 ;;; @@ quitting
1867 ;;;
1868
1869 (defun mime-preview-quit ()
1870   "Quit from MIME-preview buffer.
1871 It calls function registered in variable
1872 `mime-preview-quitting-method-alist'."
1873   (interactive)
1874   (let ((r (assq (mime-preview-original-major-mode)
1875                  mime-preview-quitting-method-alist)))
1876     (if r
1877         (funcall (cdr r))
1878       )))
1879
1880 (defun mime-preview-kill-buffer ()
1881   (interactive)
1882   (kill-buffer (current-buffer))
1883   )
1884
1885
1886 ;;; @ end
1887 ;;;
1888
1889 (provide 'mime-view)
1890
1891 (eval-when-compile
1892   (setq mime-situation-examples-file nil)
1893   ;; to avoid to read situation-examples-file at compile time.
1894   )
1895
1896 (mime-view-read-situation-examples-file)
1897
1898 ;;; mime-view.el ends here