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