147 lines
4.8 KiB
EmacsLisp
147 lines
4.8 KiB
EmacsLisp
;;; mm-partial.el --- showing message/partial -*- lexical-binding: t; -*-
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;; Copyright (C) 2000-2024 Free Software Foundation, Inc.
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;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
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;; Keywords: message partial
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(require 'gnus-sum)
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(require 'mm-util)
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(require 'mm-decode)
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(defun mm-partial-find-parts (id &optional art)
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(let ((headers (with-current-buffer gnus-summary-buffer
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gnus-newsgroup-headers))
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phandles header)
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(while (setq header (pop headers))
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(unless (eq (aref header 0) art)
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(mm-with-unibyte-buffer
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(gnus-request-article-this-buffer (aref header 0)
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gnus-newsgroup-name)
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(when (search-forward id nil t)
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(let ((nhandles (mm-dissect-buffer
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nil gnus-article-loose-mime))
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nid)
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(if (consp (car nhandles))
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(mm-destroy-parts nhandles)
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(setq nid (cdr (assq 'id
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(cdr (mm-handle-type nhandles)))))
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(if (not (equal id nid))
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(mm-destroy-parts nhandles)
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(push nhandles phandles))))))))
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phandles))
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(defvar gnus-displaying-mime)
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;;;###autoload
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(defun mm-inline-partial (handle &optional no-display)
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"Show the partial part of HANDLE.
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This function replaces the buffer of HANDLE with a buffer contains
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the entire message.
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If NO-DISPLAY is nil, display it. Otherwise, do nothing after replacing."
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(let ((id (cdr (assq 'id (cdr (mm-handle-type handle)))))
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phandles
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(b (point)) (n 1) total
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phandle nn ntotal
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gnus-displaying-mime handles) ;; buffer
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(unless (mm-handle-cache handle)
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(unless id
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(error "Can not find message/partial id"))
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(setq phandles
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(sort (cons handle
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(mm-partial-find-parts
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id
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(with-current-buffer gnus-summary-buffer
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(gnus-summary-article-number))))
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(lambda (a b)
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(let ((anumber (string-to-number
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(cdr (assq 'number
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(cdr (mm-handle-type a))))))
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(bnumber (string-to-number
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(cdr (assq 'number
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(cdr (mm-handle-type b)))))))
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(< anumber bnumber)))))
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(setq gnus-article-mime-handles
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(mm-merge-handles gnus-article-mime-handles phandles))
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(with-current-buffer (generate-new-buffer " *mm*")
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(while (setq phandle (pop phandles))
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(setq nn (string-to-number
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(cdr (assq 'number
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(cdr (mm-handle-type phandle))))))
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(setq ntotal (string-to-number
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(cdr (assq 'total
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(cdr (mm-handle-type phandle))))))
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(if ntotal
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(if total
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(unless (eq total ntotal)
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(error "The numbers of total are different"))
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(setq total ntotal)))
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(unless (< nn n)
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(unless (eq nn n)
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(error "Missing part %d" n))
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(mm-insert-part phandle)
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(goto-char (point-max))
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(when (not (eq 0 (skip-chars-backward "\r\n")))
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;; remove tail blank spaces except one
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(if (looking-at "\r?\n")
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(goto-char (match-end 0)))
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(delete-region (point) (point-max)))
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(setq n (+ n 1))))
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(unless total
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(error "Don't known the total number of"))
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(if (<= n total)
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(error "Missing part %d" n))
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(kill-buffer (mm-handle-buffer handle))
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(goto-char (point-min))
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(let ((point (if (search-forward "\n\n" nil t)
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(1- (point))
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(point-max))))
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(goto-char (point-min))
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(unless (re-search-forward "^mime-version:" point t)
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(insert "MIME-Version: 1.0\n")))
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(setcar handle (current-buffer))
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(mm-handle-set-cache handle t)))
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(unless no-display
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(save-excursion
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(save-restriction
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(narrow-to-region b b)
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(mm-insert-part handle)
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(let (gnus-article-mime-handles)
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(run-hooks 'gnus-article-decode-hook)
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(gnus-article-prepare-display)
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(setq handles gnus-article-mime-handles))
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(when handles
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;; It is in article buffer.
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(setq gnus-article-mime-handles
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(mm-merge-handles gnus-article-mime-handles handles)))
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(mm-handle-set-undisplayer
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handle
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(let ((beg (point-min-marker))
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(end (point-max-marker)))
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(lambda ()
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(let ((inhibit-read-only t))
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(delete-region beg end))))))))))
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(provide 'mm-partial)
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;;; mm-partial.el ends here
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