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Annotation of 43BSD/contrib/emacs/lisp/rmailkwd.el, revision 1.1

1.1     ! root        1: ;; "RMAIL" mail reader for Emacs.
        !             2: ;; Copyright (C) 1985 Richard M. Stallman.
        !             3: 
        !             4: ;; This file is part of GNU Emacs.
        !             5: 
        !             6: ;; GNU Emacs is distributed in the hope that it will be useful,
        !             7: ;; but WITHOUT ANY WARRANTY.  No author or distributor
        !             8: ;; accepts responsibility to anyone for the consequences of using it
        !             9: ;; or for whether it serves any particular purpose or works at all,
        !            10: ;; unless he says so in writing.  Refer to the GNU Emacs General Public
        !            11: ;; License for full details.
        !            12: 
        !            13: ;; Everyone is granted permission to copy, modify and redistribute
        !            14: ;; GNU Emacs, but only under the conditions described in the
        !            15: ;; GNU Emacs General Public License.   A copy of this license is
        !            16: ;; supposed to have been given to you along with GNU Emacs so you
        !            17: ;; can know your rights and responsibilities.  It should be in a
        !            18: ;; file named COPYING.  Among other things, the copyright notice
        !            19: ;; and this notice must be preserved on all copies.
        !            20: 
        !            21: 
        !            22: ;; Global to all RMAIL buffers.  It exists primarily for the sake of
        !            23: ;; completion.  It is better to use strings with the label functions
        !            24: ;; and let them worry about making the label.
        !            25: 
        !            26: (defvar rmail-label-obarray (make-vector 47 0))
        !            27: 
        !            28: ;; Named list of symbols representing valid message attributes in RMAIL.
        !            29: 
        !            30: (defconst rmail-attributes
        !            31:   (cons 'rmail-keywords
        !            32:        (mapcar '(lambda (s) (intern s rmail-label-obarray))
        !            33:                '("deleted" "answered" "filed" "forwarded" "unseen"))))
        !            34: 
        !            35: (defconst rmail-deleted-label (intern "deleted" rmail-label-obarray))
        !            36: 
        !            37: ;; Named list of symbols representing valid message keywords in RMAIL.
        !            38: 
        !            39: (defvar rmail-keywords nil)
        !            40: 
        !            41: (defun rmail-add-label (string)
        !            42:   "Add LABEL to labels associated with current RMAIL message.
        !            43: Completion is performed over known labels when reading."
        !            44:   (interactive (list (rmail-read-label "Add label")))
        !            45:   (rmail-set-label string t))
        !            46: 
        !            47: (defun rmail-kill-label (string)
        !            48:   "Remove LABEL from labels associated with current RMAIL message.
        !            49: Completion is performed over known labels when reading."
        !            50:   (interactive (list (rmail-read-label "Remove label")))
        !            51:   (rmail-set-label string nil))
        !            52: 
        !            53: (defun rmail-read-label (prompt)
        !            54:   (if (not rmail-keywords) (rmail-parse-file-keywords))
        !            55:   (let ((result
        !            56:         (completing-read (concat prompt
        !            57:                                  (if rmail-last-label
        !            58:                                      (concat " (default "
        !            59:                                              (symbol-name rmail-last-label)
        !            60:                                              "): ")
        !            61:                                    ": "))
        !            62:                          rmail-label-obarray
        !            63:                          nil
        !            64:                          nil)))
        !            65:     (if (string= result "")
        !            66:        rmail-last-label
        !            67:       (setq rmail-last-label (rmail-make-label result t)))))
        !            68: 
        !            69: (defun rmail-set-label (l state &optional n)
        !            70:   (rmail-maybe-set-message-counters)
        !            71:   (if (not n) (setq n rmail-current-message))
        !            72:   (aset rmail-summary-vector (1- n) nil)
        !            73:   (let* ((attribute (rmail-attribute-p l))
        !            74:         (keyword (and (not attribute)
        !            75:                       (or (rmail-keyword-p l)
        !            76:                           (rmail-install-keyword l))))
        !            77:         (label (or attribute keyword)))
        !            78:     (if label
        !            79:        (let ((omax (- (buffer-size) (point-max)))
        !            80:              (omin (- (buffer-size) (point-min)))
        !            81:              (buffer-read-only nil)
        !            82:              (case-fold-search t))
        !            83:          (unwind-protect
        !            84:              (save-excursion
        !            85:                (widen)
        !            86:                (goto-char (rmail-msgbeg n))
        !            87:                (forward-line 1)
        !            88:                (if (not (looking-at "[01],"))
        !            89:                    nil
        !            90:                  (let ((start (1+ (point)))
        !            91:                        (bound))
        !            92:                    (narrow-to-region (point) (progn (end-of-line) (point)))
        !            93:                    (setq bound (point-max))
        !            94:                    (search-backward ",," nil t)
        !            95:                    (if attribute
        !            96:                        (setq bound (1+ (point)))
        !            97:                      (setq start (1+ (point))))
        !            98:                    (goto-char start)
        !            99:                    (rmail-nuke-whitespace)
        !           100:                    (if (re-search-forward
        !           101:                           (concat "," (rmail-quote-label-name label) ",")
        !           102:                           bound
        !           103:                           'move)
        !           104:                        (if (not state) (replace-match ","))
        !           105:                      (if state (insert (symbol-name label) ",")))
        !           106:                    (if (eq label rmail-deleted-label)
        !           107:                        (rmail-set-message-deleted-p n state)))))
        !           108:            (narrow-to-region (- (buffer-size) omin) (- (buffer-size) omax))
        !           109:            (if (= n rmail-current-message) (rmail-display-labels)))))))
        !           110: 
        !           111: ;; Commented functions aren't used by RMAIL but might be nice for user
        !           112: ;; packages that do stuff with RMAIL.  Note that rmail-message-labels-p
        !           113: ;; is in rmailsum now.
        !           114: 
        !           115: ;(defun rmail-message-attribute-p (attribute &optional n)
        !           116: ;  "Returns t if ATTRIBUTE on NTH or current message."
        !           117: ;  (rmail-message-labels-p (rmail-make-label attribute t) n))
        !           118: 
        !           119: ;(defun rmail-message-keyword-p (keyword &optional n)
        !           120: ;  "Returns t if KEYWORD on NTH or current message."
        !           121: ;  (rmail-message-labels-p (rmail-make-label keyword t) n t))
        !           122: 
        !           123: ;(defun rmail-message-label-p (label &optional n)
        !           124: ;  "Returns symbol if LABEL (attribute or keyword) on NTH or current message."
        !           125: ;  (rmail-message-labels-p (rmail-make-label label t) n 'all))
        !           126: 
        !           127: ;; Not used by RMAIL but might be nice for user package.
        !           128: 
        !           129: ;(defun rmail-parse-message-labels (&optional n)
        !           130: ;  "Returns labels associated with NTH or current RMAIL message.
        !           131: ;Results is a list of two lists.  The first is the message attributes
        !           132: ;and the second is the message keywords.  Labels are represented as symbols."
        !           133: ;  (let ((omin (- (buffer-size) (point-min)))
        !           134: ;      (omax (- (buffer-size) (point-max)))
        !           135: ;      (result))       
        !           136: ;    (unwind-protect
        !           137: ;      (save-excursion
        !           138: ;        (let ((beg (rmail-msgbeg (or n rmail-current-message))))
        !           139: ;          (widen)
        !           140: ;          (goto-char beg)
        !           141: ;          (forward-line 1)
        !           142: ;          (if (looking-at "[01],")
        !           143: ;              (save-restriction
        !           144: ;                (narrow-to-region (point) (save-excursion (end-of-line) (point)))
        !           145: ;                (rmail-nuke-whitespace)
        !           146: ;                (goto-char (1+ (point-min)))
        !           147: ;                (list (mail-parse-comma-list) (mail-parse-comma-list))))))
        !           148: ;      (narrow-to-region (- (buffer-size) omin)
        !           149: ;                       (- (buffer-size) omax))
        !           150: ;      nil)))
        !           151: 
        !           152: (defun rmail-attribute-p (s)
        !           153:   (let ((symbol (rmail-make-label s)))
        !           154:     (if (memq symbol (cdr rmail-attributes)) symbol)))
        !           155: 
        !           156: (defun rmail-keyword-p (s)
        !           157:   (let ((symbol (rmail-make-label s)))
        !           158:     (if (memq symbol (cdr (rmail-keywords))) symbol)))
        !           159: 
        !           160: (defun rmail-make-label (s &optional forcep)
        !           161:   (cond ((symbolp s) s)
        !           162:        (forcep (intern (downcase s) rmail-label-obarray))
        !           163:        (t  (intern-soft (downcase s) rmail-label-obarray))))
        !           164: 
        !           165: (defun rmail-force-make-label (s)
        !           166:   (intern (downcase s) rmail-label-obarray))
        !           167: 
        !           168: (defun rmail-quote-label-name (label)
        !           169:   (regexp-quote (symbol-name (rmail-make-label label t))))
        !           170: 
        !           171: ;; Delete all whitespace in the visible part of the buffer.
        !           172: ;; The use of this function is unclean, and it should be flushed.
        !           173: (defun rmail-nuke-whitespace ()
        !           174:   (save-excursion
        !           175:     (let ((buffer-read-only nil))
        !           176:       (goto-char (point-min))
        !           177:       (while (re-search-forward "[ \t]+" nil t)
        !           178:        (replace-match "")))))
        !           179: 
        !           180: 
        !           181: ;; Motion on messages with keywords.
        !           182: 
        !           183: (defun rmail-previous-labeled-message (n label)
        !           184:   "Show previous message with LABEL.  Defaults to last labels used.
        !           185: With prefix argument N moves backward N messages with these labels."
        !           186:   (interactive "p\nsMove to previous msg with labels: ")
        !           187:   (rmail-next-labeled-message (- n) label))
        !           188: 
        !           189: (defun rmail-next-labeled-message (n labels)
        !           190:   "Show next message with LABEL.  Defaults to last labels used.
        !           191: With prefix argument N moves forward N messages with these labels."
        !           192:   (interactive "p\nsMove to next msg with labels: ")
        !           193:   (if (string= labels "")
        !           194:       (setq labels rmail-last-multi-labels))
        !           195:   (or labels
        !           196:       (error "No labels to find have been specified previously"))
        !           197:   (setq rmail-last-multi-labels labels)
        !           198:   (rmail-maybe-set-message-counters)
        !           199:   (let ((lastwin rmail-current-message)
        !           200:        (current rmail-current-message)
        !           201:        (regexp (concat ",\\("
        !           202:                        (mail-comma-list-regexp labels)
        !           203:                        "\\),")))
        !           204:     (save-restriction
        !           205:       (widen)
        !           206:       (while (and (> n 0) (< current rmail-total-messages))
        !           207:        (setq current (1+ current))
        !           208:        (if (rmail-message-labels-p current regexp)
        !           209:            (setq lastwin current n (1- n))))
        !           210:       (while (and (< n 0) (> current 1))
        !           211:        (setq current (1- current))
        !           212:        (if (rmail-message-labels-p current regexp)
        !           213:            (setq lastwin current n (1+ n)))))
        !           214:     (rmail-show-message lastwin)
        !           215:     (if (< n 0)
        !           216:        (message "No previous message with labels %s" labels))
        !           217:     (if (> n 0)
        !           218:        (message "No following message with labels %s" labels))))
        !           219: 
        !           220: ;;; Manipulate the file's Labels option.
        !           221: 
        !           222: ;; Return a list of symbols for all
        !           223: ;; the keywords (labels) recorded in this file's Labels option.
        !           224: (defun rmail-keywords ()
        !           225:   (or rmail-keywords (rmail-parse-file-keywords)))
        !           226: 
        !           227: ;; Set rmail-keywords to a list of symbols for all
        !           228: ;; the keywords (labels) recorded in this file's Labels option.
        !           229: (defun rmail-parse-file-keywords ()
        !           230:   (save-restriction
        !           231:     (save-excursion
        !           232:       (widen)
        !           233:       (goto-char 1)
        !           234:       (setq rmail-keywords
        !           235:            (if (search-forward "\nLabels:" (rmail-msgbeg 1) t)
        !           236:                (progn
        !           237:                  (narrow-to-region (point) (progn (end-of-line) (point)))
        !           238:                  (goto-char (point-min))
        !           239:                  (cons 'rmail-keywords
        !           240:                        (mapcar 'rmail-force-make-label
        !           241:                                (mail-parse-comma-list)))))))))
        !           242: 
        !           243: ;; Add WORD to the list in the file's Labels option.
        !           244: ;; Any keyword used for the first time needs this done.
        !           245: (defun rmail-install-keyword (word)
        !           246:   (let ((keyword (rmail-make-label word t))
        !           247:        (keywords (rmail-keywords)))
        !           248:     (if (not (or (rmail-attribute-p keyword)
        !           249:                 (rmail-keyword-p keyword)))
        !           250:        (let ((omin (- (buffer-size) (point-min)))
        !           251:              (omax (- (buffer-size) (point-max))))
        !           252:          (unwind-protect
        !           253:              (save-excursion
        !           254:                (widen)
        !           255:                (goto-char 1)
        !           256:                (let ((case-fold-search t)
        !           257:                      (buffer-read-only nil))
        !           258:                  (or (search-forward "\nLabels:" nil t)
        !           259:                      (progn
        !           260:                        (end-of-line)
        !           261:                        (insert "\nLabels:")))
        !           262:                  (delete-region (point) (progn (end-of-line) (point)))
        !           263:                  (setcdr keywords (cons keyword (cdr keywords)))
        !           264:                  (while (setq keywords (cdr keywords))
        !           265:                    (insert (symbol-name (car keywords)) ","))
        !           266:                  (delete-char -1)))
        !           267:            (narrow-to-region (- (buffer-size) omin)
        !           268:                              (- (buffer-size) omax)))))
        !           269:     keyword))

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