+++ /dev/null
-;;; pmail-header.el --- Header handling code of "PMAIL" mail reader for Emacs
-
-;; Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
-;; Free Software Foundation, Inc.
-
-;; Maintainer: FSF
-;; Keywords: mail
-
-;; This file is part of GNU Emacs.
-
-;; GNU Emacs is free software: you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation, either version 3 of the License, or
-;; (at your option) any later version.
-
-;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;; GNU General Public License for more details.
-
-;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
-
-;;; Commentary:
-
-;;; Code:
-
-(eval-when-compile
- (require 'mail-utils))
-
-(defconst pmail-header-attribute-header "X-BABYL-V6-ATTRIBUTES"
- "The header that stores the Pmail attribute data.")
-
-(defconst pmail-header-keyword-header "X-BABYL-V6-KEYWORDS"
- "The header that stores the Pmail keyword data.")
-
-(defvar pmail-header-overlay-list nil
- "List of cached overlays used to make headers hidden or visible.")
-
-(defvar pmail-header-display-state nil
- "Records the current header display state.
-nil means headers are displayed, t indicates headers are not displayed.")
-
-(defun pmail-header-get-limit ()
- "Return the end of the headers.
-The current buffer must show one message. If you want to narrow
-to the headers of a mail by number, use `pmail-narrow-to-header'
-instead."
- (save-excursion
- (goto-char (point-min))
- (if (search-forward "\n\n" nil t)
- (1- (point))
- (error "Invalid message format"))))
-
-(defun pmail-header-add-header (header value)
- "Add HEADER to the list of headers and associate VALUE with it.
-The current buffer, possibly narrowed, contains a single message.
-If VALUE is nil or the empty string, the header is removed
-instead."
- (save-excursion
- (let* ((inhibit-read-only t)
- (case-fold-search t)
- (inhibit-point-motion-hooks t)
- (buffer-undo-list t)
- (limit (pmail-header-get-limit))
- start end)
- ;; Search for the given header. If found, then set it's value.
- ;; If not then add the header to the end of the header section.
- (goto-char (point-min))
- (if (re-search-forward (format "^%s: " header) limit t)
- (let ((start (match-beginning 0)))
- (re-search-forward "\n[^ \t]")
- (goto-char limit)
- (delete-region start (1+ (match-beginning 0))))
- (goto-char limit))
- (when (> (length value) 0)
- (insert header ": " value "\n")))))
-
-(defun pmail-header-contains-keyword-p (keyword)
- "Return t if KEYWORD exists in the current buffer, nil otherwise."
- (let ((limit (pmail-header-get-limit)))
- (goto-char (point-min))
- (if (re-search-forward (format "^%s: " pmail-header-keyword-header) limit t)
- ;; Some keywords exist. Now search for the specific keyword.
- (let ((start (point))
- (end (progn (end-of-line) (point))))
- (if (re-search-forward (concat "\\(" keyword ",\\|" keyword "$\\)"))
- t)))))
-
-(defun pmail-header-get-header (&rest args)
- "Return the text value for a header or nil if no such header exists.
-The arguments ARGS are passed to `mail-fetch-field'. The first
-argument is the header to get.
-
-The current buffer, possibly narrowed, contains a single message.
-Note that it is not necessary to call `pmail-header-show-headers'
-because `inhibit-point-motion-hooks' is locally bound to t."
- (save-excursion
- (save-restriction
- (let* ((inhibit-point-motion-hooks t)
- (limit (pmail-header-get-limit)))
- (narrow-to-region (point-min) limit)
- (apply 'mail-fetch-field args)))))
-
-(defun pmail-header-get-keywords ()
- "Return the keywords in the current message.
-The current buffer, possibly narrowed, contains a single message."
- ;; Search for a keyword header and return the comma separated
- ;; strings as a list.
- (let ((limit (pmail-header-get-limit)) result)
- (goto-char (point-min))
- (if (re-search-forward
- (format "^%s: " pmail-header-keyword-header) limit t)
- (save-excursion
- (save-restriction
- (narrow-to-region (point) (line-end-position))
- (goto-char (point-min))
- (mail-parse-comma-list))))))
-
-(defun pmail-header-hide-headers ()
- "Hide ignored headers. All others will be visible.
-The current buffer, possibly narrowed, contains a single message."
- (save-excursion
- (pmail-header-show-headers)
- (let ((overlay-list pmail-header-overlay-list)
- (limit (pmail-header-get-limit))
- (inhibit-point-motion-hooks t)
- (case-fold-search t)
- visibility-p)
- ;; Record the display state as having headers hidden.
- (setq pmail-header-display-state t)
- (if pmail-displayed-headers
- ;; Set the visibility predicate function to ignore headers
- ;; marked for display.
- (setq visibility-p 'pmail-header-show-displayed-p)
- ;; Set the visibility predicate function to hide ignored
- ;; headers.
- (setq visibility-p 'pmail-header-hide-ignored-p))
- ;; Walk through all the headers marking the non-displayed
- ;; headers as invisible.
- (goto-char (point-min))
- (while (re-search-forward "^[^ \t:]+[ :]" limit t)
- ;; Determine if the current header needs to be hidden.
- (forward-line 0)
- (if (not (funcall visibility-p))
- ;; It does not. Move point away from this header.
- (progn
- (forward-line 1)
- (while (looking-at "[ \t]+")
- (forward-line 1)))
- ;; It does. Make this header hidden by setting an overlay
- ;; with both the invisible and intangible properties set.
- (let ((start (point)))
- ;; Move to end and pick upp any continuation lines on folded
- ;; headers.
- (forward-line 1)
- (while (looking-at "[ \t]+")
- (forward-line 1))
- (if (car overlay-list)
- ;; Use one of the cleared, cached overlays.
- (let ((overlay (car overlay-list)))
- (move-overlay overlay start (point))
- (setq overlay-list (cdr overlay-list)))
- ;; No overlay exists for this header. Create one and
- ;; add it to the cache.
- (let ((overlay (make-overlay start (point))))
- (overlay-put overlay 'invisible t)
- (overlay-put overlay 'intangible t)
- (push overlay pmail-header-overlay-list)))))))))
-
-(defun pmail-header-show-headers ()
- "Show all headers.
-The current buffer, possibly narrowed, contains a single message."
- ;; Remove all the overlays used to control hiding headers.
- (mapc 'delete-overlay pmail-header-overlay-list)
- (setq pmail-header-display-state nil))
-
-(defun pmail-header-toggle-visibility (&optional arg)
- "Toggle the visibility of the ignored headers if ARG is nil.
-Hide the ignored headers if ARG is greater than 0, otherwise show the
-ignored headers. The current buffer, possibly narrowed, contains a
-single message."
- (cond ((eq arg nil)
- (if pmail-header-display-state
- (pmail-header-show-headers)
- (pmail-header-hide-headers)))
- ((or (eq arg t) (> arg 0))
- (pmail-header-hide-headers))
- (t (pmail-header-show-headers))))
-
-(defun pmail-header-hide-ignored-p ()
- "Test that the header is one of the headers marked to be ignored."
- (looking-at pmail-ignored-headers))
-
-(defun pmail-header-show-displayed-p ()
- "Test that the header is not one of the headers marked for display."
- (not (looking-at pmail-displayed-headers)))
-
-(provide 'pmailhdr)
-
-;; arch-tag: d708a0d9-2686-4958-b61a-7d3d2ace2131
-;;; pmailhdr.el ends here
projects / emacs.git / commitdiff