1 ;;; mime-view.el --- interactive MIME viewer for GNU Emacs
3 ;; Copyright (C) 1995,96,97,98,99,2000 Free Software Foundation, Inc.
5 ;; Author: MORIOKA Tomohiko <tomo@m17n.org>
7 ;; Renamed: 1994/08/31 from tm-body.el
8 ;; Renamed: 1997/02/19 from tm-view.el
9 ;; Keywords: MIME, multimedia, mail, news
11 ;; This file is part of SEMI (Sample of Elastic MIME Interfaces).
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.
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.
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.
36 (eval-when-compile (require 'static))
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) ")"))
52 (defgroup mime-view nil
56 (defcustom mime-situation-examples-file "~/.mime-example"
57 "*File name of situation-examples demonstrated by user."
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."
67 :type '(choice (const :tag "Off" nil)
69 (sexp :tag "Situation" 1)))
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)))
76 "List of mailcap files."
81 ;;; @ in raw-buffer (representation space)
84 (defvar mime-preview-buffer nil
85 "MIME-preview buffer corresponding with the (raw) buffer.")
86 (make-variable-buffer-local 'mime-preview-buffer)
89 (defvar mime-raw-representation-type-alist
90 '((mime-show-message-mode . binary)
91 (mime-temp-message-mode . binary)
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'.")
100 ;;; @ in preview-buffer (presentation space)
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)
109 ;; (defvar mime-raw-buffer nil
110 ;; "Raw buffer corresponding with the (MIME-preview) buffer.")
111 ;; (make-variable-buffer-local 'mime-raw-buffer)
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)
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
122 (if (and recursive mime-mother-buffer)
124 (set-buffer mime-mother-buffer)
125 (mime-preview-original-major-mode recursive)
127 (cdr (assq 'major-mode
128 (get-text-property (or point
129 (if (> (point) (buffer-size))
130 (max (1- (point-max)) (point-min))
132 'mime-view-situation)))))
135 ;;; @ entity information
138 (defun mime-entity-situation (entity &optional situation)
139 "Return situation of ENTITY."
140 (let (rest param name)
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)
148 (unless (assq 'subtype situation)
150 (setq rest (or (cdr (mime-entity-content-type entity))
151 '((subtype . plain)))))
152 (setq situation (cons (car rest) situation)
156 (setq param (car rest))
157 (or (assoc (car param) situation)
158 (setq situation (cons param situation)))
159 (setq rest (cdr rest)))
161 ;; Content-Disposition
163 (unless (assq 'disposition-type situation)
164 (setq rest (mime-entity-content-disposition entity))
166 (setq situation (cons (cons 'disposition-type
167 (mime-content-disposition-type rest))
169 rest (mime-content-disposition-parameters rest))
172 (setq param (car rest)
174 (if (cond ((string= name "filename")
175 (if (assq 'filename situation)
177 (setq name 'filename)))
178 ((string= name "creation-date")
179 (if (assq 'creation-date situation)
181 (setq name 'creation-date)))
182 ((string= name "modification-date")
183 (if (assq 'modification-date situation)
185 (setq name 'modification-date)))
186 ((string= name "read-date")
187 (if (assq 'read-date situation)
189 (setq name 'read-date)))
190 ((string= name "size")
191 (if (assq 'size situation)
194 (t (setq name (cons 'disposition name))
195 (if (assoc name situation)
199 (cons (cons name (cdr param))
201 (setq rest (cdr rest)))
203 ;; Content-Transfer-Encoding
204 (or (assq 'encoding situation)
206 (cons (cons 'encoding (or (mime-entity-encoding entity)
212 (defsubst mime-delq-null-situation (situations field
213 &rest ignored-values)
216 (let* ((situation (car situations))
217 (cell (assq field situation)))
219 (or (memq (cdr cell) ignored-values)
220 (setq dest (cons situation dest))
222 (setq situations (cdr situations)))
225 (defun mime-compare-situation-with-example (situation example)
226 (let ((example (copy-alist example))
229 (let* ((cell (car situation))
231 (ecell (assoc key example)))
233 (if (equal cell ecell)
234 (setq match (1+ match))
235 (setq example (delq ecell example))
238 (setq situation (cdr situation))
243 (defun mime-sort-situation (situation)
253 (disposition-type . 6)
257 (let ((ret (assq a-t order)))
259 (setq a-order (cdr ret))
265 (let ((ret (assq b-t order)))
267 (setq b-order (cdr ret))
272 (if (= a-order b-order)
273 (string< (format "%s" a-t)(format "%s" b-t))
278 (defun mime-unify-situations (entity-situation
279 condition situation-examples
280 &optional required-name ignored-value
283 (in-calist-package 'mime-view)
285 (ctree-find-calist condition entity-situation
288 (setq ret (mime-delq-null-situation ret required-name
290 (or (assq 'ignore-examples entity-situation)
298 (let ((situation (car rest))
299 (examples situation-examples))
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))
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))
317 ((= (cdar examples) max-escore)
319 (cons (cdr ret) max-examples))
320 (or (member situation max-situations)
322 (cons situation max-situations)))
324 (setq examples (cdr examples))))
325 (setq rest (cdr rest)))
327 (setq ret max-situations)
329 (let* ((example (car max-examples))
331 (assoc example situation-examples)))
333 (setcdr cell (1+ (cdr cell)))
334 (setq situation-examples
335 (cons (cons example 0)
338 (setq max-examples (cdr max-examples))
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)
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)
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)
356 (defun mime-find-entity-preview-situation (entity
357 &optional default-situation)
359 (mime-unify-situations
360 (append (mime-entity-situation entity)
362 mime-preview-condition
363 mime-preview-situation-example-list)))
364 (setq mime-preview-situation-example-list
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)
374 (defun mime-view-read-situation-examples-file (&optional file)
376 (setq file mime-situation-examples-file))
378 (file-readable-p file))
380 (insert-file-contents file)
381 (setq mime-situation-examples-file-coding-system
383 ((boundp 'buffer-file-coding-system)
384 (symbol-value 'buffer-file-coding-system))
385 ((boundp 'file-coding-system)
386 (symbol-value 'file-coding-system))
388 ;; (and (boundp 'buffer-file-coding-system)
389 ;; buffer-file-coding-system)
391 (condition-case error
393 (error (message "%s is broken: %s" file (cdr error))))
397 (while (and (> (length mime-preview-situation-example-list)
398 mime-preview-situation-example-list-max-size)
400 (setq mime-preview-situation-example-list
401 (mime-reduce-situation-examples
402 mime-preview-situation-example-list))
404 (error (setq mime-preview-situation-example-list nil)))
405 ;; (let ((rest mime-preview-situation-example-list))
407 ;; (ctree-set-calist-strictly 'mime-preview-condition
409 ;; (setq rest (cdr rest))))
412 (while (and (> (length mime-acting-situation-example-list)
413 mime-acting-situation-example-list-max-size)
415 (setq mime-acting-situation-example-list
416 (mime-reduce-situation-examples
417 mime-acting-situation-example-list))
419 (error (setq mime-acting-situation-example-list nil))))))
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)
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)
435 (if mime-acting-situation-example-list
436 (pp `(setq mime-acting-situation-example-list
437 ',mime-acting-situation-example-list)
440 (file-name-nondirectory file)
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)
454 (add-hook 'kill-emacs-hook 'mime-save-situation-examples)
456 (defun mime-reduce-situation-examples (situation-examples)
457 (let ((len (length situation-examples))
465 ir situation-examples)
469 jr situation-examples)
473 (setq ret (mime-compare-situation-with-example (car ic)(car jc))
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)
485 dest (cons (cdr ret) freq))
488 (cond ((> min-det-ret det-ret)
489 (setq min-det-ret det-ret
494 dest (cons (cdr ret) freq))
496 ((= min-det-ret det-ret)
497 (cond ((> min-det-org det-org)
498 (setq min-det-org det-org
502 dest (cons (cdr ret) freq))
504 ((= min-det-org det-org)
505 (cond ((> min-freq freq)
509 dest (cons (cdr ret) freq))
523 (setq jr (nthcdr (1- d-j) situation-examples))
524 (setcdr jr (cddr jr))
526 (setq situation-examples
527 (cdr situation-examples))
528 (setq ir (nthcdr (1- d-i) situation-examples))
529 (setcdr ir (cddr ir))
531 (if (setq ir (assoc (car dest) situation-examples))
533 (setcdr ir (+ (cdr ir)(cdr dest)))
535 (cons dest situation-examples)
536 ;; situation-examples may be modified.
540 ;;; @ presentation of preview
546 ;;; @@@ predicate function
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)
560 ;; (not (eq (mime-entity-media-subtype mother-entity)
565 ;;; @@@ entity button generator
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)))
574 (let ((access-type (assoc "access-type" params))
575 (num (or (cdr (assoc "x-part-number" params))
576 (if (consp entity-node-id)
579 (format "%s" (1+ num))
581 (reverse entity-node-id) ".")
585 (let ((server (assoc "server" params)))
586 (setq access-type (cdr access-type))
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)))
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))
602 (let ((media-type (mime-entity-media-type entity))
603 (media-subtype (mime-entity-media-subtype entity))
604 (charset (cdr (assoc "charset" params)))
605 (encoding (mime-entity-encoding entity)))
609 (format " <%s/%s%s%s>"
610 media-type media-subtype
612 (concat "; " charset)
615 (concat " (" encoding ")")
617 (if (>= (+ (current-column)(length rest))(window-width))
621 (function mime-preview-play-current-entity))
628 (defvar mime-header-presentation-method-alist nil
629 "Alist of major mode vs. corresponding header-presentation-method functions.
630 Each element looks like (SYMBOL . FUNCTION).
631 SYMBOL must be major mode in raw-buffer or t. t means default.
632 Interface of FUNCTION must be (ENTITY SITUATION).")
634 (defvar mime-view-ignored-field-list
635 '(".*Received:" ".*Path:" ".*Id:" "^References:"
636 "^Replied:" "^Errors-To:"
637 "^Lines:" "^Sender:" ".*Host:" "^Xref:"
638 "^Content-Type:" "^Precedence:"
639 "^Status:" "^X-VM-.*:")
640 "All fields that match this list will be hidden in MIME preview buffer.
641 Each elements are regexp of field-name.")
643 (defvar mime-view-visible-field-list '("^Dnas.*:" "^Message-Id:")
644 "All fields that match this list will be displayed in MIME preview buffer.
645 Each elements are regexp of field-name.")
651 ;;; @@@ predicate function
654 (in-calist-package 'mime-view)
656 (defun mime-calist::field-match-method-as-default-rule (calist
657 field-type field-value)
658 (let ((s-field (assq field-type calist)))
659 (cond ((null s-field)
660 (cons (cons field-type field-value) calist)
664 (define-calist-field-match-method
665 'header #'mime-calist::field-match-method-as-default-rule)
667 (define-calist-field-match-method
668 'body #'mime-calist::field-match-method-as-default-rule)
671 (defvar mime-preview-condition nil
672 "Condition-tree about how to display entity.")
674 (ctree-set-calist-strictly
675 'mime-preview-condition '((type . application)(subtype . octet-stream)
678 (ctree-set-calist-strictly
679 'mime-preview-condition '((type . application)(subtype . octet-stream)
682 (ctree-set-calist-strictly
683 'mime-preview-condition '((type . application)(subtype . octet-stream)
687 (ctree-set-calist-strictly
688 'mime-preview-condition '((type . application)(subtype . pgp)
691 (ctree-set-calist-strictly
692 'mime-preview-condition '((type . application)(subtype . x-latex)
695 (ctree-set-calist-strictly
696 'mime-preview-condition '((type . application)(subtype . x-selection)
699 (ctree-set-calist-strictly
700 'mime-preview-condition '((type . application)(subtype . x-comment)
703 (ctree-set-calist-strictly
704 'mime-preview-condition '((type . message)(subtype . delivery-status)
707 (ctree-set-calist-strictly
708 'mime-preview-condition
710 (body-presentation-method . mime-display-text/plain)))
712 (ctree-set-calist-strictly
713 'mime-preview-condition
716 (body-presentation-method . mime-display-text/plain)))
718 (ctree-set-calist-strictly
719 'mime-preview-condition
720 '((type . text)(subtype . enriched)
722 (body-presentation-method . mime-display-text/enriched)))
724 (ctree-set-calist-strictly
725 'mime-preview-condition
726 '((type . text)(subtype . richtext)
728 (body-presentation-method . mime-display-text/richtext)))
730 (autoload 'mime-display-application/x-postpet "postpet")
732 (ctree-set-calist-strictly
733 'mime-preview-condition
734 '((type . application)(subtype . x-postpet)
736 (body-presentation-method . mime-display-application/x-postpet)))
738 (ctree-set-calist-strictly
739 'mime-preview-condition
740 '((type . text)(subtype . t)
742 (body-presentation-method . mime-display-text/plain)))
744 (ctree-set-calist-strictly
745 'mime-preview-condition
746 '((type . multipart)(subtype . alternative)
748 (body-presentation-method . mime-display-multipart/alternative)))
750 (ctree-set-calist-strictly
751 'mime-preview-condition
752 '((type . multipart)(subtype . related)
754 (body-presentation-method . mime-display-multipart/related)))
756 (ctree-set-calist-strictly
757 'mime-preview-condition
758 '((type . multipart)(subtype . t)
760 (body-presentation-method . mime-display-multipart/mixed)))
762 (ctree-set-calist-strictly
763 'mime-preview-condition
764 '((type . message)(subtype . partial)
766 (body-presentation-method . mime-display-message/partial-button)))
768 (ctree-set-calist-strictly
769 'mime-preview-condition
770 '((type . message)(subtype . rfc822)
772 (body-presentation-method . mime-display-multipart/mixed)
773 (childrens-situation (header . visible)
774 (entity-button . invisible))))
776 (ctree-set-calist-strictly
777 'mime-preview-condition
778 '((type . message)(subtype . news)
780 (body-presentation-method . mime-display-multipart/mixed)
781 (childrens-situation (header . visible)
782 (entity-button . invisible))))
785 ;;; @@@ entity presentation
788 (defun mime-display-text/plain (entity situation)
790 (narrow-to-region (point-max)(point-max))
792 (mime-insert-text-content entity)
794 (message "Can't decode current entity.")
796 (run-hooks 'mime-text-decode-hook)
797 (goto-char (point-max))
798 (if (not (eq (char-after (1- (point))) ?\n))
801 (mime-add-url-buttons)
802 (run-hooks 'mime-display-text/plain-hook)
805 (defun mime-display-text/richtext (entity situation)
807 (narrow-to-region (point-max)(point-max))
808 (mime-insert-text-content entity)
809 (run-hooks 'mime-text-decode-hook)
810 (let ((beg (point-min)))
811 (remove-text-properties beg (point-max) '(face nil))
812 (richtext-decode beg (point-max))
815 (defun mime-display-text/enriched (entity situation)
817 (narrow-to-region (point-max)(point-max))
818 (mime-insert-text-content entity)
819 (run-hooks 'mime-text-decode-hook)
820 (let ((beg (point-min)))
821 (remove-text-properties beg (point-max) '(face nil))
822 (enriched-decode beg (point-max))
826 (defvar mime-view-announcement-for-message/partial
827 (if (and (>= emacs-major-version 19) window-system)
829 \[[ This is message/partial style split message. ]]
830 \[[ Please press `v' key in this buffer ]]
831 \[[ or click here by mouse button-2. ]]"
833 \[[ This is message/partial style split message. ]]
834 \[[ Please press `v' key in this buffer. ]]"
837 (defun mime-display-message/partial-button (&optional entity situation)
839 (goto-char (point-max))
840 (if (not (search-backward "\n\n" nil t))
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)
850 (defun mime-display-multipart/mixed (entity situation)
851 (let ((children (mime-entity-children entity))
852 (original-major-mode-cell (assq 'major-mode 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)))
859 (mime-display-entity (car children) nil default-situation)
860 (setq children (cdr children))
863 (defcustom mime-view-type-subtype-score-alist
864 '(((text . enriched) . 3)
865 ((text . richtext) . 2)
868 "Alist MEDIA-TYPE vs corresponding score.
869 MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t. t means default."
871 :type '(repeat (cons (choice :tag "Media-Type"
872 (cons :tag "Type/Subtype"
873 (symbol :tag "Primary-type")
874 (symbol :tag "Subtype"))
876 (const :tag "Default" t))
879 (defun mime-display-multipart/alternative (entity situation)
880 (let* ((children (mime-entity-children entity))
881 (original-major-mode-cell (assq 'major-mode situation))
883 (cdr (assq 'childrens-situation situation)))
888 (if original-major-mode-cell
889 (setq default-situation
890 (cons original-major-mode-cell default-situation)))
895 (mime-find-entity-preview-situation
896 child default-situation)))
897 (if (cdr (assq 'body-presentation-method situation))
902 (cdr (assq 'type situation))
903 (cdr (assq 'subtype situation)))
904 mime-view-type-subtype-score-alist)
906 (cdr (assq 'type situation))
907 mime-view-type-subtype-score-alist)
910 mime-view-type-subtype-score-alist)
912 (if (> score max-score)
922 (let ((child (car children))
923 (situation (car situations)))
924 (mime-display-entity child (if (= i p)
926 (put-alist 'body 'invisible
927 (copy-alist situation)))))
928 (setq children (cdr children)
929 situations (cdr situations)
932 (defun mime-display-multipart/related (entity situation)
933 (let* ((param-start (mime-parse-msg-id
934 (std11-lexical-analyze
936 (mime-content-type-parameters
937 (mime-entity-content-type entity)))))))
938 (start (or (and param-start (mime-find-entity-from-content-id
941 (car (mime-entity-children entity))))
942 (original-major-mode-cell (assq 'major-mode situation))
943 (default-situation (cdr (assq 'childrens-situation situation))))
944 (if original-major-mode-cell
945 (setq default-situation
946 (cons original-major-mode-cell default-situation)))
947 (mime-display-entity start nil default-situation)))
949 ;;; @ acting-condition
952 (defvar mime-acting-condition nil
953 "Condition-tree about how to process entity.")
955 (defun mime-view-read-mailcap-files (&optional files)
957 (setq files mime-view-mailcap-files))
960 (setq file (car files))
961 (if (file-readable-p file)
962 (setq entries (append entries (mime-parse-mailcap-file file))))
963 (setq files (cdr files)))
965 (let ((entry (car entries))
968 (let* ((field (car entry))
969 (field-type (car field)))
970 (cond ((eq field-type 'view) (setq view field))
971 ((eq field-type 'print) (setq print field))
972 ((memq field-type '(compose composetyped edit)))
973 (t (setq shared (cons field shared))))
975 (setq entry (cdr entry)))
976 (setq shared (nreverse shared))
977 (ctree-set-calist-with-default
978 'mime-acting-condition
979 (append shared (list '(mode . "play")(cons 'method (cdr view)))))
981 (ctree-set-calist-with-default
982 'mime-acting-condition
984 (list '(mode . "print")(cons 'method (cdr view)))))))
985 (setq entries (cdr entries)))))
987 (mime-view-read-mailcap-files)
989 (ctree-set-calist-strictly
990 'mime-acting-condition
991 '((type . application)(subtype . octet-stream)
993 (method . mime-detect-content)
996 (ctree-set-calist-with-default
997 'mime-acting-condition
999 (method . mime-save-content)))
1001 (ctree-set-calist-strictly
1002 'mime-acting-condition
1003 '((type . text)(subtype . x-rot13-47)(mode . "play")
1004 (method . mime-view-caesar)
1006 (ctree-set-calist-strictly
1007 'mime-acting-condition
1008 '((type . text)(subtype . x-rot13-47-48)(mode . "play")
1009 (method . mime-view-caesar)
1012 (ctree-set-calist-strictly
1013 'mime-acting-condition
1014 '((type . message)(subtype . rfc822)(mode . "play")
1015 (method . mime-view-message/rfc822)
1017 (ctree-set-calist-strictly
1018 'mime-acting-condition
1019 '((type . message)(subtype . partial)(mode . "play")
1020 (method . mime-store-message/partial-piece)
1023 (ctree-set-calist-strictly
1024 'mime-acting-condition
1025 '((type . message)(subtype . external-body)
1026 ("access-type" . "anon-ftp")
1027 (method . mime-view-message/external-anon-ftp)
1030 (ctree-set-calist-strictly
1031 'mime-acting-condition
1032 '((type . message)(subtype . external-body)
1033 ("access-type" . "url")
1034 (method . mime-view-message/external-url)
1037 (ctree-set-calist-strictly
1038 'mime-acting-condition
1039 '((type . application)(subtype . octet-stream)
1040 (method . mime-save-content)
1044 ;;; @ quitting method
1047 (defvar mime-preview-quitting-method-alist
1048 '((mime-show-message-mode
1049 . mime-preview-quitting-method-for-mime-show-message-mode))
1050 "Alist of major-mode vs. quitting-method of mime-view.")
1052 (defvar mime-preview-over-to-previous-method-alist nil
1053 "Alist of major-mode vs. over-to-previous-method of mime-view.")
1055 (defvar mime-preview-over-to-next-method-alist nil
1056 "Alist of major-mode vs. over-to-next-method of mime-view.")
1059 ;;; @ following method
1062 (defvar mime-preview-following-method-alist nil
1063 "Alist of major-mode vs. following-method of mime-view.")
1065 (defvar mime-view-following-required-fields-list
1072 (defun mime-display-entity (entity &optional situation
1073 default-situation preview-buffer)
1075 (setq preview-buffer (current-buffer)))
1076 (let* (e nb ne nhb nbb)
1077 (in-calist-package 'mime-view)
1080 (mime-find-entity-preview-situation entity default-situation)))
1081 (let ((button-is-invisible
1082 (eq (cdr (or (assq '*entity-button situation)
1083 (assq 'entity-button situation)))
1086 (eq (cdr (or (assq '*header situation)
1087 (assq 'header situation)))
1090 (eq (cdr (or (assq '*body situation)
1091 (assq 'body situation)))
1093 (children (mime-entity-children entity)))
1094 (set-buffer preview-buffer)
1096 (narrow-to-region nb nb)
1097 (or button-is-invisible
1098 ;; (if (mime-view-entity-button-visible-p entity)
1099 (mime-view-insert-entity-button entity)
1102 (if header-is-visible
1103 (let ((header-presentation-method
1104 (or (cdr (assq 'header-presentation-method situation))
1105 (cdr (assq (cdr (assq 'major-mode situation))
1106 mime-header-presentation-method-alist)))))
1108 (if header-presentation-method
1109 (funcall header-presentation-method entity situation)
1110 (mime-insert-header entity
1111 mime-view-ignored-field-list
1112 mime-view-visible-field-list))
1113 (run-hooks 'mime-display-header-hook)
1114 (put-text-property nhb (point-max) 'mime-view-entity-header entity)
1115 (goto-char (point-max))
1120 (let ((body-presentation-method
1121 (cdr (assq 'body-presentation-method situation))))
1122 (if (functionp body-presentation-method)
1123 (funcall body-presentation-method entity situation)
1124 (mime-display-text/plain entity situation)))
1125 (when button-is-invisible
1126 (goto-char (point-max))
1127 (mime-view-insert-entity-button entity)
1129 (unless header-is-visible
1130 (goto-char (point-max))
1133 (setq ne (point-max))
1135 (put-text-property nb ne 'mime-view-entity entity)
1136 (put-text-property nb ne 'mime-view-situation situation)
1137 (put-text-property nbb ne 'mime-view-entity-body entity)
1139 (if (and children body-is-visible)
1140 (let ((body-presentation-method
1141 (cdr (assq 'body-presentation-method situation))))
1142 (if (functionp body-presentation-method)
1143 (funcall body-presentation-method entity situation)
1144 (mime-display-multipart/mixed entity situation))))
1148 ;;; @ MIME viewer mode
1151 (defconst mime-view-menu-title "MIME-View")
1152 (defconst mime-view-menu-list
1153 '((up "Move to upper entity" mime-preview-move-to-upper)
1154 (previous "Move to previous entity" mime-preview-move-to-previous)
1155 (next "Move to next entity" mime-preview-move-to-next)
1156 (scroll-down "Scroll-down" mime-preview-scroll-down-entity)
1157 (scroll-up "Scroll-up" mime-preview-scroll-up-entity)
1158 (play "Play current entity" mime-preview-play-current-entity)
1159 (extract "Extract current entity" mime-preview-extract-current-entity)
1160 (print "Print current entity" mime-preview-print-current-entity)
1162 "Menu for MIME Viewer")
1164 (cond ((featurep 'xemacs)
1165 (defvar mime-view-xemacs-popup-menu
1166 (cons mime-view-menu-title
1169 (vector (nth 1 item)(nth 2 item) t)
1171 mime-view-menu-list)))
1172 (defun mime-view-xemacs-popup-menu (event)
1173 "Popup the menu in the MIME Viewer buffer"
1175 (select-window (event-window event))
1176 (set-buffer (event-buffer event))
1177 (popup-menu 'mime-view-xemacs-popup-menu))
1178 (defvar mouse-button-2 'button2)
1179 (defvar mouse-button-3 'button3)
1182 (defvar mime-view-popup-menu
1183 (let ((menu (make-sparse-keymap mime-view-menu-title)))
1187 (list (intern (nth 1 item)) 'menu-item
1188 (nth 1 item)(nth 2 item))
1190 mime-view-menu-list))))
1191 (defun mime-view-popup-menu (event)
1192 "Popup the menu in the MIME Viewer buffer"
1194 (let ((menu mime-view-popup-menu) events func)
1195 (setq events (x-popup-menu t menu))
1197 (setq func (lookup-key menu (apply #'vector events)))
1200 (defvar mouse-button-2 [mouse-2])
1201 (defvar mouse-button-3 [mouse-3])
1204 (defun mime-view-define-keymap (&optional default)
1205 (let ((mime-view-mode-map (if (keymapp default)
1206 (copy-keymap default)
1207 (make-sparse-keymap))))
1208 (define-key mime-view-mode-map
1209 "u" (function mime-preview-move-to-upper))
1210 (define-key mime-view-mode-map
1211 "p" (function mime-preview-move-to-previous))
1212 (define-key mime-view-mode-map
1213 "n" (function mime-preview-move-to-next))
1214 (define-key mime-view-mode-map
1215 "\e\t" (function mime-preview-move-to-previous))
1216 (define-key mime-view-mode-map
1217 "\t" (function mime-preview-move-to-next))
1218 (define-key mime-view-mode-map
1219 " " (function mime-preview-scroll-up-entity))
1220 (define-key mime-view-mode-map
1221 "\M- " (function mime-preview-scroll-down-entity))
1222 (define-key mime-view-mode-map
1223 "\177" (function mime-preview-scroll-down-entity))
1224 (define-key mime-view-mode-map
1225 "\C-m" (function mime-preview-next-line-entity))
1226 (define-key mime-view-mode-map
1227 "\C-\M-m" (function mime-preview-previous-line-entity))
1228 (define-key mime-view-mode-map
1229 "v" (function mime-preview-play-current-entity))
1230 (define-key mime-view-mode-map
1231 "e" (function mime-preview-extract-current-entity))
1232 (define-key mime-view-mode-map
1233 "\C-c\C-p" (function mime-preview-print-current-entity))
1235 (define-key mime-view-mode-map
1236 "\C-c\C-t\C-f" (function mime-preview-toggle-header))
1237 (define-key mime-view-mode-map
1238 "\C-c\C-th" (function mime-preview-toggle-header))
1239 (define-key mime-view-mode-map
1240 "\C-c\C-t\C-c" (function mime-preview-toggle-content))
1242 (define-key mime-view-mode-map
1243 "\C-c\C-v\C-f" (function mime-preview-show-header))
1244 (define-key mime-view-mode-map
1245 "\C-c\C-vh" (function mime-preview-show-header))
1246 (define-key mime-view-mode-map
1247 "\C-c\C-v\C-c" (function mime-preview-show-content))
1249 (define-key mime-view-mode-map
1250 "\C-c\C-d\C-f" (function mime-preview-hide-header))
1251 (define-key mime-view-mode-map
1252 "\C-c\C-dh" (function mime-preview-hide-header))
1253 (define-key mime-view-mode-map
1254 "\C-c\C-d\C-c" (function mime-preview-hide-content))
1256 (define-key mime-view-mode-map
1257 "a" (function mime-preview-follow-current-entity))
1258 (define-key mime-view-mode-map
1259 "q" (function mime-preview-quit))
1260 (define-key mime-view-mode-map
1261 "\C-c\C-x" (function mime-preview-kill-buffer))
1262 ;; (define-key mime-view-mode-map
1263 ;; "<" (function beginning-of-buffer))
1264 ;; (define-key mime-view-mode-map
1265 ;; ">" (function end-of-buffer))
1266 (define-key mime-view-mode-map
1267 "?" (function describe-mode))
1268 (define-key mime-view-mode-map
1269 [tab] (function mime-preview-move-to-next))
1270 (define-key mime-view-mode-map
1271 [delete] (function mime-preview-scroll-down-entity))
1272 (define-key mime-view-mode-map
1273 [backspace] (function mime-preview-scroll-down-entity))
1274 (if (functionp default)
1275 (cond ((featurep 'xemacs)
1276 (set-keymap-default-binding mime-view-mode-map default)
1279 (setq mime-view-mode-map
1280 (append mime-view-mode-map (list (cons t default))))
1283 (define-key mime-view-mode-map
1284 mouse-button-2 (function mime-button-dispatcher))
1286 (cond ((featurep 'xemacs)
1287 (define-key mime-view-mode-map
1288 mouse-button-3 (function mime-view-xemacs-popup-menu))
1290 ((>= emacs-major-version 19)
1291 (define-key mime-view-mode-map
1292 mouse-button-3 (function mime-view-popup-menu))
1293 (define-key mime-view-mode-map [menu-bar mime-view]
1294 (cons mime-view-menu-title
1295 (make-sparse-keymap mime-view-menu-title)))
1298 (define-key mime-view-mode-map
1299 (vector 'menu-bar 'mime-view (car item))
1300 (cons (nth 1 item)(nth 2 item)))
1302 (reverse mime-view-menu-list))
1304 ;; (run-hooks 'mime-view-define-keymap-hook)
1305 mime-view-mode-map))
1307 (defvar mime-view-mode-default-map (mime-view-define-keymap))
1310 (defsubst mime-maybe-hide-echo-buffer ()
1311 "Clear mime-echo buffer and delete window for it."
1312 (let ((buf (get-buffer mime-echo-buffer-name)))
1317 (let ((win (get-buffer-window buf)))
1324 (defvar mime-view-redisplay nil)
1327 (defun mime-display-message (message &optional preview-buffer
1328 mother default-keymap-or-function
1329 original-major-mode keymap)
1330 "View MESSAGE in MIME-View mode.
1332 Optional argument PREVIEW-BUFFER specifies the buffer of the
1333 presentation. It must be either nil or a name of preview buffer.
1335 Optional argument MOTHER specifies mother-buffer of the preview-buffer.
1337 Optional argument DEFAULT-KEYMAP-OR-FUNCTION is nil, keymap or
1338 function. If it is a keymap, keymap of MIME-View mode will be added
1339 to it. If it is a function, it will be bound as default binding of
1340 keymap of MIME-View mode.
1342 Optional argument ORIGINAL-MAJOR-MODE is major-mode of representation
1343 buffer of MESSAGE. If it is nil, current `major-mode' is used.
1345 Optional argument KEYMAP is keymap of MIME-View mode. If it is
1346 non-nil, DEFAULT-KEYMAP-OR-FUNCTION is ignored. If it is nil,
1347 `mime-view-mode-default-map' is used."
1348 (mime-maybe-hide-echo-buffer)
1349 (let ((win-conf (current-window-configuration)))
1351 (setq preview-buffer
1352 (concat "*Preview-" (mime-entity-name message) "*")))
1353 (or original-major-mode
1354 (setq original-major-mode major-mode))
1355 (let ((inhibit-read-only t))
1356 (set-buffer (get-buffer-create preview-buffer))
1360 (setq mime-mother-buffer mother))
1361 (setq mime-preview-original-window-configuration win-conf)
1362 (setq major-mode 'mime-view-mode)
1363 (setq mode-name "MIME-View")
1364 (mime-display-entity message nil
1365 `((entity-button . invisible)
1367 (major-mode . ,original-major-mode))
1371 (if default-keymap-or-function
1372 (mime-view-define-keymap default-keymap-or-function)
1373 mime-view-mode-default-map)))
1375 (next-single-property-change (point-min) 'mime-view-entity)))
1378 (goto-char (point-min))
1379 (search-forward "\n\n" nil t)))
1380 (run-hooks 'mime-view-mode-hook)
1381 (set-buffer-modified-p nil)
1382 (setq buffer-read-only t)
1386 (defun mime-view-buffer (&optional raw-buffer preview-buffer mother
1387 default-keymap-or-function
1388 representation-type)
1389 "View RAW-BUFFER in MIME-View mode.
1390 Optional argument PREVIEW-BUFFER is either nil or a name of preview
1392 Optional argument DEFAULT-KEYMAP-OR-FUNCTION is nil, keymap or
1393 function. If it is a keymap, keymap of MIME-View mode will be added
1394 to it. If it is a function, it will be bound as default binding of
1395 keymap of MIME-View mode.
1396 Optional argument REPRESENTATION-TYPE is representation-type of
1397 message. It must be nil, `binary' or `cooked'. If it is nil,
1398 `cooked' is used as default."
1401 (setq raw-buffer (current-buffer)))
1402 (or representation-type
1403 (setq representation-type
1405 (set-buffer raw-buffer)
1406 (cdr (or (assq major-mode mime-raw-representation-type-alist)
1407 (assq t mime-raw-representation-type-alist)))
1409 (if (eq representation-type 'binary)
1410 (setq representation-type 'buffer)
1412 (setq preview-buffer (mime-display-message
1413 (mime-open-entity representation-type raw-buffer)
1414 preview-buffer mother default-keymap-or-function))
1415 (or (get-buffer-window preview-buffer)
1416 (let ((r-win (get-buffer-window raw-buffer)))
1418 (set-window-buffer r-win preview-buffer)
1419 (let ((m-win (and mother (get-buffer-window mother))))
1421 (set-window-buffer m-win preview-buffer)
1422 (switch-to-buffer preview-buffer)
1425 (defun mime-view-mode (&optional mother ctl encoding
1426 raw-buffer preview-buffer
1427 default-keymap-or-function)
1428 "Major mode for viewing MIME message.
1430 Here is a list of the standard keys for mime-view-mode.
1435 u Move to upper content
1436 p or M-TAB Move to previous content
1437 n or TAB Move to next content
1438 SPC Scroll up or move to next content
1439 M-SPC or DEL Scroll down or move to previous content
1440 RET Move to next line
1441 M-RET Move to previous line
1442 v Decode current content as `play mode'
1443 e Decode current content as `extract mode'
1444 C-c C-p Decode current content as `print mode'
1445 a Followup to current content.
1447 button-2 Move to point under the mouse cursor
1448 and decode current content as `play mode'
1451 (unless mime-view-redisplay
1453 (if raw-buffer (set-buffer raw-buffer))
1456 (or (assq major-mode mime-raw-representation-type-alist)
1457 (assq t mime-raw-representation-type-alist)))))
1458 (if (eq type 'binary)
1461 (setq mime-message-structure (mime-open-entity type raw-buffer))
1462 (or (mime-entity-content-type mime-message-structure)
1463 (mime-entity-set-content-type mime-message-structure ctl))
1465 (or (mime-entity-encoding mime-message-structure)
1466 (mime-entity-set-encoding mime-message-structure encoding))
1468 (mime-display-message mime-message-structure preview-buffer
1469 mother default-keymap-or-function)
1476 (defun mime-preview-find-boundary-info (&optional with-children)
1477 "Return boundary information of current part.
1478 If WITH-CHILDREN, refer boundary surrounding current part and its branches."
1482 (while (null (setq entity
1483 (get-text-property (point) 'mime-view-entity)))
1485 (setq p-beg (previous-single-property-change (point) 'mime-view-entity))
1486 (setq entity-node-id (mime-entity-node-id entity))
1487 (setq len (length entity-node-id))
1490 (if (eq (next-single-property-change (point-min)
1496 ((eq (next-single-property-change p-beg 'mime-view-entity)
1498 (setq p-beg (point))
1500 (setq p-end (next-single-property-change p-beg 'mime-view-entity))
1502 (setq p-end (point-max))
1504 ((null entity-node-id)
1505 (setq p-end (point-max))
1512 (next-single-property-change
1513 (point) 'mime-view-entity))
1515 (let ((rc (mime-entity-node-id
1516 (get-text-property (point)
1517 'mime-view-entity))))
1518 (or (and (>= (setq i (- (length rc) len)) 0)
1519 (equal entity-node-id (nthcdr i rc)))
1521 (setq p-end (or (next-single-property-change
1522 (point) 'mime-view-entity)
1524 (setq p-end (point-max))))
1526 (vector p-beg p-end entity)))
1532 (autoload 'mime-preview-play-current-entity "mime-play"
1533 "Play current entity." t)
1535 (defun mime-preview-extract-current-entity (&optional ignore-examples)
1536 "Extract current entity into file (maybe).
1537 It decodes current entity to call internal or external method as
1538 \"extract\" mode. The method is selected from variable
1539 `mime-acting-condition'."
1541 (mime-preview-play-current-entity ignore-examples "extract")
1544 (defun mime-preview-print-current-entity (&optional ignore-examples)
1545 "Print current entity (maybe).
1546 It decodes current entity to call internal or external method as
1547 \"print\" mode. The method is selected from variable
1548 `mime-acting-condition'."
1550 (mime-preview-play-current-entity ignore-examples "print")
1557 (defun mime-preview-follow-current-entity ()
1558 "Write follow message to current entity.
1559 It calls following-method selected from variable
1560 `mime-preview-following-method-alist'."
1562 (let ((entity (mime-preview-find-boundary-info t))
1565 (setq p-beg (aref entity 0)
1566 p-end (aref entity 1)
1567 entity (aref entity 2))
1568 (if (get-text-property p-beg 'mime-view-entity-body)
1571 (next-single-property-change
1572 p-beg 'mime-view-entity-body nil
1573 (or (next-single-property-change p-beg 'mime-view-entity)
1575 (let* ((mode (mime-preview-original-major-mode 'recursive))
1576 (entity-node-id (mime-entity-node-id entity))
1578 (format "%s-%s" (buffer-name) (reverse entity-node-id)))
1580 (the-buf (current-buffer))
1583 (set-buffer (setq new-buf (get-buffer-create new-name)))
1586 (insert-buffer-substring the-buf pb-beg p-end)
1587 (goto-char (point-min))
1588 (let ((current-entity
1589 (if (and (eq (mime-entity-media-type entity) 'message)
1590 (eq (mime-entity-media-subtype entity) 'rfc822))
1591 (car (mime-entity-children entity))
1593 (while (and current-entity
1594 (if (and (eq (mime-entity-media-type
1595 current-entity) 'message)
1596 (eq (mime-entity-media-subtype
1597 current-entity) 'rfc822))
1599 (mime-insert-header current-entity fields)
1601 (setq fields (std11-collect-field-names)
1602 current-entity (mime-entity-parent current-entity))
1604 (let ((rest mime-view-following-required-fields-list)
1607 (setq field-name (car rest))
1608 (or (std11-field-body field-name)
1611 (set-buffer the-buf)
1612 (let ((entity (when mime-mother-buffer
1613 (set-buffer mime-mother-buffer)
1614 (get-text-property (point)
1615 'mime-view-entity))))
1617 (null (setq ret (mime-entity-fetch-field
1618 entity field-name))))
1619 (setq entity (mime-entity-parent entity)))))
1621 (insert (concat field-name ": " ret "\n"))
1623 (setq rest (cdr rest))
1626 (let ((f (cdr (assq mode mime-preview-following-method-alist))))
1631 "Sorry, following method for %s is not implemented yet."
1640 (defun mime-preview-move-to-upper ()
1641 "Move to upper entity.
1642 If there is no upper entity, call function `mime-preview-quit'."
1645 (while (null (setq cinfo
1646 (get-text-property (point) 'mime-view-entity)))
1649 (let ((r (mime-entity-parent cinfo))
1652 (while (setq point (previous-single-property-change
1653 (point) 'mime-view-entity))
1655 (when (eq r (get-text-property (point) 'mime-view-entity))
1656 (if (or (eq mime-preview-move-scroll t)
1657 (and mime-preview-move-scroll
1660 (move-to-window-line -1)
1661 (forward-line (* -1 next-screen-context-lines))
1664 (recenter next-screen-context-lines))
1671 (defun mime-preview-move-to-previous ()
1672 "Move to previous entity.
1673 If there is no previous entity, it calls function registered in
1674 variable `mime-preview-over-to-previous-method-alist'."
1676 (while (and (not (bobp))
1677 (null (get-text-property (point) 'mime-view-entity)))
1680 (let ((point (previous-single-property-change (point) 'mime-view-entity)))
1682 (>= point (point-min)))
1683 (if (get-text-property (1- point) 'mime-view-entity)
1684 (progn (goto-char point)
1686 (or (eq mime-preview-move-scroll t)
1687 (and mime-preview-move-scroll
1690 (move-to-window-line 0)
1691 (forward-line next-screen-context-lines)
1694 (recenter (* -1 next-screen-context-lines))))
1695 (goto-char (1- point))
1696 (mime-preview-move-to-previous)
1698 (let ((f (assq (mime-preview-original-major-mode)
1699 mime-preview-over-to-previous-method-alist)))
1705 (defun mime-preview-move-to-next ()
1706 "Move to next entity.
1707 If there is no previous entity, it calls function registered in
1708 variable `mime-preview-over-to-next-method-alist'."
1710 (while (and (not (eobp))
1711 (null (get-text-property (point) 'mime-view-entity)))
1714 (let ((point (next-single-property-change (point) 'mime-view-entity)))
1716 (<= point (point-max)))
1719 (if (null (get-text-property point 'mime-view-entity))
1720 (mime-preview-move-to-next)
1722 (or (eq mime-preview-move-scroll t)
1723 (and mime-preview-move-scroll
1726 (move-to-window-line -1)
1728 (* -1 next-screen-context-lines))
1731 (recenter next-screen-context-lines))
1733 (let ((f (assq (mime-preview-original-major-mode)
1734 mime-preview-over-to-next-method-alist)))
1740 (defun mime-preview-scroll-up-entity (&optional h)
1741 "Scroll up current entity.
1742 If reached to (point-max), it calls function registered in variable
1743 `mime-preview-over-to-next-method-alist'."
1746 (let ((f (assq (mime-preview-original-major-mode)
1747 mime-preview-over-to-next-method-alist)))
1752 (or (next-single-property-change (point) 'mime-view-entity)
1754 (bottom (window-end (selected-window))))
1757 (progn (goto-char point)
1758 (recenter next-screen-context-lines))
1762 (goto-char (point-max)))))
1765 (defun mime-preview-scroll-down-entity (&optional h)
1766 "Scroll down current entity.
1767 If reached to (point-min), it calls function registered in variable
1768 `mime-preview-over-to-previous-method-alist'."
1771 (let ((f (assq (mime-preview-original-major-mode)
1772 mime-preview-over-to-previous-method-alist)))
1777 (or (previous-single-property-change (point) 'mime-view-entity)
1779 (top (window-start (selected-window))))
1782 (progn (goto-char point)
1783 (recenter (* -1 next-screen-context-lines)))
1786 (beginning-of-buffer
1787 (goto-char (point-min)))))
1790 (defun mime-preview-next-line-entity (&optional lines)
1791 "Scroll up one line (or prefix LINES lines).
1792 If LINES is negative, scroll down LINES lines."
1794 (mime-preview-scroll-up-entity (or lines 1))
1797 (defun mime-preview-previous-line-entity (&optional lines)
1798 "Scrroll down one line (or prefix LINES lines).
1799 If LINES is negative, scroll up LINES lines."
1801 (mime-preview-scroll-down-entity (or lines 1))
1808 (defun mime-preview-toggle-display (type &optional display)
1809 (let ((situation (mime-preview-find-boundary-info t))
1810 (sym (intern (concat "*" (symbol-name type))))
1812 (setq p-beg (aref situation 0)
1813 p-end (aref situation 1)
1814 entity (aref situation 2)
1815 situation (get-text-property p-beg 'mime-view-situation))
1816 (cond ((eq display 'invisible)
1821 (eq (cdr (or (assq sym situation)
1822 (assq type situation)))
1824 (setq situation (put-alist sym (if display
1829 (let ((inhibit-read-only t))
1830 (delete-region p-beg p-end)
1831 (mime-display-entity entity situation)))
1832 (let ((ret (assoc situation mime-preview-situation-example-list)))
1834 (setcdr ret (1+ (cdr ret)))
1835 (add-to-list 'mime-preview-situation-example-list
1836 (cons situation 0))))))
1838 (defun mime-preview-toggle-header (&optional force-visible)
1840 (mime-preview-toggle-display 'header force-visible))
1842 (defun mime-preview-toggle-content (&optional force-visible)
1844 (mime-preview-toggle-display 'body force-visible))
1846 (defun mime-preview-show-header ()
1848 (mime-preview-toggle-display 'header 'visible))
1850 (defun mime-preview-show-content ()
1852 (mime-preview-toggle-display 'body 'visible))
1854 (defun mime-preview-hide-header ()
1856 (mime-preview-toggle-display 'header 'invisible))
1858 (defun mime-preview-hide-content ()
1860 (mime-preview-toggle-display 'body 'invisible))
1866 (defun mime-preview-quit ()
1867 "Quit from MIME-preview buffer.
1868 It calls function registered in variable
1869 `mime-preview-quitting-method-alist'."
1871 (let ((r (assq (mime-preview-original-major-mode)
1872 mime-preview-quitting-method-alist)))
1877 (defun mime-preview-kill-buffer ()
1879 (kill-buffer (current-buffer))
1886 (provide 'mime-view)
1889 (setq mime-situation-examples-file nil)
1890 ;; to avoid to read situation-examples-file at compile time.
1893 (mime-view-read-situation-examples-file)
1895 ;;; mime-view.el ends here