lisp/gnus/mm-partial.el

   1 ;;; mm-partial.el --- showing message/partial
   2
   3 ;; Copyright (C) 2000, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   5
   6 ;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
   7 ;; Keywords: message partial
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;;; Code:
  27
  28 (eval-when-compile (require 'cl))
  29
  30 (require 'gnus-sum)
  31 (require 'mm-util)
  32 (require 'mm-decode)
  33
  34 (defun mm-partial-find-parts (id &optional art)
  35   (let ((headers (with-current-buffer gnus-summary-buffer
  36                    gnus-newsgroup-headers))
  37         phandles header)
  38     (while (setq header (pop headers))
  39       (unless (eq (aref header 0) art)
  40         (mm-with-unibyte-buffer
  41           (gnus-request-article-this-buffer (aref header 0)
  42                                             gnus-newsgroup-name)
  43           (when (search-forward id nil t)
  44             (let ((nhandles (mm-dissect-buffer
  45                              nil gnus-article-loose-mime)) nid)
  46               (if (consp (car nhandles))
  47                   (mm-destroy-parts nhandles)
  48                 (setq nid (cdr (assq 'id
  49                                      (cdr (mm-handle-type nhandles)))))
  50                 (if (not (equal id nid))
  51                     (mm-destroy-parts nhandles)
  52                   (push nhandles phandles))))))))
  53     phandles))
  54
  55 ;;;###autoload
  56 (defun mm-inline-partial (handle &optional no-display)
  57   "Show the partial part of HANDLE.
  58 This function replaces the buffer of HANDLE with a buffer contains
  59 the entire message.
  60 If NO-DISPLAY is nil, display it. Otherwise, do nothing after replacing."
  61   (let ((id (cdr (assq 'id (cdr (mm-handle-type handle)))))
  62         phandles
  63         (b (point)) (n 1) total
  64         phandle nn ntotal
  65         gnus-displaying-mime handles buffer)
  66     (unless (mm-handle-cache handle)
  67       (unless id
  68         (error "Can not find message/partial id"))
  69       (setq phandles
  70             (sort (cons handle
  71                         (mm-partial-find-parts
  72                          id
  73                          (save-excursion
  74                            (set-buffer gnus-summary-buffer)
  75                            (gnus-summary-article-number))))
  76                   #'(lambda (a b)
  77                       (let ((anumber (string-to-number
  78                                       (cdr (assq 'number
  79                                                  (cdr (mm-handle-type a))))))
  80                             (bnumber (string-to-number
  81                                       (cdr (assq 'number
  82                                                  (cdr (mm-handle-type b)))))))
  83                         (< anumber bnumber)))))
  84       (setq gnus-article-mime-handles
  85             (mm-merge-handles gnus-article-mime-handles phandles))
  86       (save-excursion
  87         (set-buffer (generate-new-buffer " *mm*"))
  88         (while (setq phandle (pop phandles))
  89           (setq nn (string-to-number
  90                     (cdr (assq 'number
  91                                (cdr (mm-handle-type phandle))))))
  92           (setq ntotal (string-to-number
  93                         (cdr (assq 'total
  94                                    (cdr (mm-handle-type phandle))))))
  95           (if ntotal
  96               (if total
  97                   (unless (eq total ntotal)
  98                   (error "The numbers of total are different"))
  99                 (setq total ntotal)))
 100           (unless (< nn n)
 101             (unless (eq nn n)
 102               (error "Missing part %d" n))
 103             (mm-insert-part phandle)
 104             (goto-char (point-max))
 105             (when (not (eq 0 (skip-chars-backward "\r\n")))
 106               ;; remove tail blank spaces except one
 107               (if (looking-at "\r?\n")
 108                   (goto-char (match-end 0)))
 109               (delete-region (point) (point-max)))
 110             (setq n (+ n 1))))
 111         (unless total
 112           (error "Don't known the total number of"))
 113         (if (<= n total)
 114             (error "Missing part %d" n))
 115         (kill-buffer (mm-handle-buffer handle))
 116         (goto-char (point-min))
 117         (let ((point (if (search-forward "\n\n" nil t)
 118                          (1- (point))
 119                        (point-max))))
 120           (goto-char (point-min))
 121           (unless (re-search-forward "^mime-version:" point t)
 122             (insert "MIME-Version: 1.0\n")))
 123         (setcar handle (current-buffer))
 124         (mm-handle-set-cache handle t)))
 125     (unless no-display
 126       (save-excursion
 127         (save-restriction
 128           (narrow-to-region b b)
 129           (mm-insert-part handle)
 130           (let (gnus-article-mime-handles)
 131             (run-hooks 'gnus-article-decode-hook)
 132             (gnus-article-prepare-display)
 133             (setq handles gnus-article-mime-handles))
 134           (when handles
 135             ;; It is in article buffer.
 136             (setq gnus-article-mime-handles
 137                   (mm-merge-handles gnus-article-mime-handles handles)))
 138           (mm-handle-set-undisplayer
 139            handle
 140            `(lambda ()
 141               (let (buffer-read-only)
 142                 (condition-case nil
 143                     ;; This is only valid on XEmacs.
 144                     (mapcar (lambda (prop)
 145                             (remove-specifier
 146                              (face-property 'default prop) (current-buffer)))
 147                             '(background background-pixmap foreground))
 148                   (error nil))
 149                 (delete-region ,(point-min-marker) ,(point-max-marker))))))))))
 150
 151 (provide 'mm-partial)
 152
 153 ;; arch-tag: 460e7424-05f2-4a1d-a0f2-70ec081eff7d
 154 ;;; mm-partial.el ends here