lisp/gnus/mm-partial.el

   1 ;;; mm-partial.el --- showing message/partial
   2 ;; Copyright (C) 2000 Free Software Foundation, Inc.
   3
   4 ;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
   5 ;; Keywords: message partial
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software; you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published
  11 ;; by the Free Software Foundation; either version 2, or (at your
  12 ;; option) any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful, but
  15 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17 ;; General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22 ;; Boston, MA 02111-1307, USA.
  23
  24 ;;; Commentary:
  25
  26 ;;; Code:
  27
  28 (eval-when-compile
  29   (require 'cl))
  30
  31 (require 'gnus-sum)
  32 (require 'mm-util)
  33 (require 'mm-decode)
  34
  35 (defun mm-partial-find-parts (id &optional art)
  36   (let ((headers (save-excursion
  37                    (set-buffer gnus-summary-buffer)
  38                    gnus-newsgroup-headers))
  39         phandles header)
  40     (while (setq header (pop headers))
  41       (unless (eq (aref header 0) art)
  42         (mm-with-unibyte-buffer
  43           (gnus-request-article-this-buffer (aref header 0)
  44                                             gnus-newsgroup-name)
  45           (when (search-forward id nil t)
  46             (let ((nhandles (mm-dissect-buffer)) nid)
  47               (if (consp (car nhandles))
  48                   (mm-destroy-parts nhandles)
  49                 (setq nid (cdr (assq 'id
  50                                      (cdr (mm-handle-type nhandles)))))
  51                 (if (not (equal id nid))
  52                     (mm-destroy-parts nhandles)
  53                   (push nhandles phandles))))))))
  54     phandles))
  55
  56 ;;;###autoload
  57 (defun mm-inline-partial (handle &optional no-display)
  58   "Show the partial part of HANDLE.
  59 This function replaces the buffer of HANDLE with a buffer contains
  60 the entire message.
  61 If NO-DISPLAY is nil, display it. Otherwise, do nothing after replacing."
  62   (let ((id (cdr (assq 'id (cdr (mm-handle-type handle)))))
  63         phandles
  64         (b (point)) (n 1) total
  65         phandle nn ntotal
  66         gnus-displaying-mime handles buffer)
  67     (unless (mm-handle-cache handle)
  68       (unless id
  69         (error "Can not find message/partial id."))
  70       (setq phandles
  71             (sort (cons handle
  72                         (mm-partial-find-parts
  73                          id
  74                          (save-excursion
  75                            (set-buffer gnus-summary-buffer)
  76                            (gnus-summary-article-number))))
  77                   #'(lambda (a b)
  78                       (let ((anumber (string-to-number
  79                                       (cdr (assq 'number
  80                                                  (cdr (mm-handle-type a))))))
  81                             (bnumber (string-to-number
  82                                       (cdr (assq 'number
  83                                                  (cdr (mm-handle-type b)))))))
  84                         (< anumber bnumber)))))
  85       (setq gnus-article-mime-handles
  86             (append (if (listp (car gnus-article-mime-handles))
  87                         gnus-article-mime-handles
  88                       (list gnus-article-mime-handles))
  89                     phandles))
  90       (save-excursion
  91         (set-buffer (generate-new-buffer " *mm*"))
  92         (while (setq phandle (pop phandles))
  93           (setq nn (string-to-number
  94                     (cdr (assq 'number
  95                                (cdr (mm-handle-type phandle))))))
  96           (setq ntotal (string-to-number
  97                         (cdr (assq 'total
  98                                    (cdr (mm-handle-type phandle))))))
  99           (if ntotal
 100               (if total
 101                   (unless (eq total ntotal)
 102                   (error "The numbers of total are different."))
 103                 (setq total ntotal)))
 104           (unless (< nn n)
 105             (unless (eq nn n)
 106               (error "Missing part %d" n))
 107             (mm-insert-part phandle)
 108             (goto-char (point-max))
 109             (when (not (eq 0 (skip-chars-backward "\r\n")))
 110               ;; remove tail blank spaces except one
 111               (if (looking-at "\r?\n")
 112                   (goto-char (match-end 0)))
 113               (delete-region (point) (point-max)))
 114             (setq n (+ n 1))))
 115         (unless total
 116           (error "Don't known the total number of"))
 117         (if (<= n total)
 118             (error "Missing part %d" n))
 119         (kill-buffer (mm-handle-buffer handle))
 120         (setcar handle (current-buffer))
 121         (mm-handle-set-cache handle t)))
 122     (unless no-display
 123       (save-excursion
 124         (save-restriction
 125           (narrow-to-region b b)
 126           (mm-insert-part handle)
 127           (let (gnus-article-mime-handles)
 128             (run-hooks 'gnus-article-decode-hook)
 129             (gnus-article-prepare-display)
 130             (setq handles gnus-article-mime-handles))
 131           (when handles
 132             ;; It is in article buffer.
 133             (setq gnus-article-mime-handles
 134                   (nconc (if (listp (car gnus-article-mime-handles))
 135                            gnus-article-mime-handles
 136                            (list gnus-article-mime-handles))
 137                          (if (listp (car handles))
 138                              handles (list handles)))))
 139           (mm-handle-set-undisplayer
 140            handle
 141            `(lambda ()
 142               (let (buffer-read-only)
 143                 (condition-case nil
 144                     ;; This is only valid on XEmacs.
 145                     (mapcar (lambda (prop)
 146                             (remove-specifier
 147                              (face-property 'default prop) (current-buffer)))
 148                             '(background background-pixmap foreground))
 149                   (error nil))
 150                 (delete-region ,(point-min-marker) ,(point-max-marker))))))))))
 151
 152 ;; mm-partial.el ends here