| 1 | ;;; mh-buffers.el --- MH-E buffer constants and utilities |
| 2 | |
| 3 | ;; Copyright (C) 1993, 1995, 1997, 2000-2013 Free Software Foundation, |
| 4 | ;; Inc. |
| 5 | |
| 6 | ;; Author: Bill Wohler <wohler@newt.com> |
| 7 | ;; Maintainer: Bill Wohler <wohler@newt.com> |
| 8 | ;; Keywords: mail |
| 9 | ;; See: mh-e.el |
| 10 | |
| 11 | ;; This file is part of GNU Emacs. |
| 12 | |
| 13 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
| 14 | ;; it under the terms of the GNU General Public License as published by |
| 15 | ;; the Free Software Foundation, either version 3 of the License, or |
| 16 | ;; (at your option) any later version. |
| 17 | |
| 18 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 19 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | ;; GNU 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. If not, see <http://www.gnu.org/licenses/>. |
| 25 | |
| 26 | ;;; Commentary: |
| 27 | |
| 28 | ;;; Change Log: |
| 29 | |
| 30 | ;;; Code: |
| 31 | |
| 32 | ;; The names of ephemeral buffers have a " *mh-" prefix (so that they |
| 33 | ;; are hidden and can be programmatically removed in mh-quit), and the |
| 34 | ;; variable names have the form mh-temp-.*-buffer. |
| 35 | (defconst mh-temp-buffer " *mh-temp*") ;scratch |
| 36 | (defconst mh-temp-checksum-buffer " *mh-checksum*") |
| 37 | (defconst mh-temp-fetch-buffer " *mh-fetch*") ;wget/curl/fetch output |
| 38 | (defconst mh-temp-index-buffer " *mh-index*") |
| 39 | |
| 40 | ;; The names of MH-E buffers that are not ephemeral and can be used by |
| 41 | ;; the user (and deleted by the user when no longer needed) have a |
| 42 | ;; "*MH-E " prefix (so they can be programmatically removed in |
| 43 | ;; mh-quit), and the variable names have the form mh-.*-buffer. |
| 44 | ;; Temporary buffers for search results |
| 45 | (defconst mh-aliases-buffer "*MH-E Aliases*") ;alias lookups |
| 46 | (defconst mh-folders-buffer "*MH-E Folders*") ;folder list |
| 47 | (defconst mh-help-buffer "*MH-E Help*") ;quick help |
| 48 | (defconst mh-info-buffer "*MH-E Info*") ;version information buffer |
| 49 | (defconst mh-log-buffer "*MH-E Log*") ;output of MH commands and so on |
| 50 | (defconst mh-mail-delivery-buffer "*MH-E Mail Delivery*") ;mail delivery log |
| 51 | (defconst mh-recipients-buffer "*MH-E Recipients*") ;killed when draft sent |
| 52 | (defconst mh-sequences-buffer "*MH-E Sequences*") ;sequences list |
| 53 | |
| 54 | (defvar mh-log-buffer-lines 100 |
| 55 | "Number of lines to keep in `mh-log-buffer'.") |
| 56 | |
| 57 | \f |
| 58 | |
| 59 | (defun mh-truncate-log-buffer () |
| 60 | "If `mh-log-buffer' is too big then truncate it. |
| 61 | If the number of lines in `mh-log-buffer' exceeds |
| 62 | `mh-log-buffer-lines' then keep only the last |
| 63 | `mh-log-buffer-lines'. As a side effect the point is set to the |
| 64 | end of the log buffer. |
| 65 | |
| 66 | The function returns the size of the final size of the log buffer." |
| 67 | (with-current-buffer (get-buffer-create mh-log-buffer) |
| 68 | (goto-char (point-max)) |
| 69 | (save-excursion |
| 70 | (when (equal (forward-line (- mh-log-buffer-lines)) 0) |
| 71 | (delete-region (point-min) (point)))) |
| 72 | (unless (or (bobp) |
| 73 | (save-excursion |
| 74 | (and (equal (forward-line -1) 0) (equal (char-after) ?\f)))) |
| 75 | (insert "\n\f\n")) |
| 76 | (buffer-size))) |
| 77 | |
| 78 | (provide 'mh-buffers) |
| 79 | |
| 80 | ;; Local Variables: |
| 81 | ;; indent-tabs-mode: nil |
| 82 | ;; sentence-end-double-space: nil |
| 83 | ;; End: |
| 84 | |
| 85 | ;;; mh-buffers.el ends here |