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|
;;;;; -*-coding: iso-8859-1;-*-
;;;;;
;;;;; Copyright (C) 1991-2002 Lysator Academic Computer Association.
;;;;;
;;;;; This file is part of the LysKOM Emacs LISP client.
;;;;;
;;;;; LysKOM 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 2, or (at your option)
;;;;; any later version.
;;;;;
;;;;; LysKOM 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 LysKOM; see the file COPYING. If not, write to
;;;;; Lysator, c/o ISY, Linkoping University, S-581 83 Linkoping, SWEDEN,
;;;;; or the Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
;;;;; MA 02139, USA.
;;;;;
;;;;; Please mail bug reports to bug-lyskom@lysator.liu.se.
;;;;;
;;;; ================================================================
;;;; ================================================================
;;;;
;;;; File: filter.el
;;;;
;;;; Contains the support functions for text filtering.
;;;;
(eval-when-compile
(require 'lyskom-command "command"))
;;;============================================================
;;;
;;; Filter pattern accessors
;;;
;;; Filters are lists with the following structure
;;;
;;; (filter [ PATTERNS ATTRIBUTES FUNCTION])
;;;
;;; Where PATTERNS is a list of filter patterns and ATTRIBUTES is
;;; an association list. FUNCTION is a lisp function implementing
;;; the filter.
;;;
;;; The following attributes are reserved
;;;
;;; action -- What action to take when the pattern matches. Currently
;;; one of dontshow, skip or skip-comments.
;;; expire -- When the filter expires. Not used.
;;;
(defun lyskom-make-filter (&optional p a)
"Creates and returns a filter structure.
Optional P and A initialize pattern and attributes, respectively."
(lyskom-create-filter p a (lyskom-create-compile-filter-function p)))
(defun lyskom-create-filter (pattern attribute-list function)
(list 'filter (vector pattern attribute-list function)))
(defun lyskom-recompile-filter (filter)
"Re-compile the filter FILTER"
(set-filter->function filter
(lyskom-create-compile-filter-function
(filter->pattern filter))))
(defun lyskom-copy-filter (f)
"Create a copy of the filter F"
(lyskom-make-filter (copy-tree (filter->pattern f))
(copy-tree (filter->attribute-list f))))
(defun lyskom-filter-p (f)
"Returns T if f looks like a filter"
(and (listp f)
(eq 'filter (car f))))
(defun filter->pattern (f)
"Extract the patterns part of a filter F"
(elt (elt f 1) 0))
(defun filter->attribute-list (f)
"Extract the attribute list of F."
(elt (elt f 1) 1))
(defun filter->attribute (f a)
"From filter F, extract the value of attribute A.
Returns nil if no such attribute is present."
(cdr (assq a (filter->attribute-list f))))
(defun set-filter->pattern (f p)
"Set the patterns part of F to P."
(aset (elt f 1) 0 p))
(defun set-filter->attribute-list (f l)
"Set the attribute list of filter F to L"
(aset (elt f 1) 1 l))
(defun set-filter->attribute (f a v)
"Set the value in filter F of attribute A to V."
(let ((x (assq a (filter->attribute-list f))))
(if x
(setcdr x v)
(set-filter->attribute-list f
(cons (cons a v) (filter->attribute-list f))))))
(defun filter->function (f)
"Get the function for filter F"
(elt (elt f 1) 2))
(defun set-filter->function (f fn)
"Set the function for filter F to FN"
(aset (elt f 1) 2 fn))
;;;============================================================
;;;
;;;
(defvar lyskom-filter-hack nil
"Variable to busy-wait on to get the filter action. Set to
invalid-value until a filter action has been selected.")
(defun lyskom-filter-text-p (text-no)
(if (null lyskom-filter-list)
nil
(progn
(setq lyskom-filter-hack 'invalid-value)
(initiate-get-text-stat 'filter 'lyskom-filter-text-p-2 text-no)
;;
;; Block until done
;;
(while (eq lyskom-filter-hack 'invalid-value)
(lyskom-accept-process-output))
lyskom-filter-hack)))
(defun lyskom-filter-text-p-2 (text-stat)
(if (null text-stat)
(setq lyskom-filter-hack nil)
(progn
;;
;; Collect information from the server
;;
(lyskom-collect 'filter)
;;
;; Get the conf-stat of the author of the text
;; Get the text body
;;
(initiate-get-conf-stat 'filter nil (text-stat->author text-stat))
(initiate-get-text 'filter nil (text-stat->text-no text-stat))
;;
;; Get the conf-stat of the recipients
;;
(lyskom-traverse
misc
(text-stat->misc-info-list text-stat)
(let ((type (misc-info->type misc)))
(if (memq type lyskom-recpt-types-list)
(initiate-get-conf-stat 'filter
nil
(misc-info->recipient-no misc)))))
;;
;; Use the results
;;
(lyskom-use 'filter 'lyskom-filter-text-p-3 text-stat))))
(defun lyskom-filter-text-p-3 (author text &rest data)
(if (null text)
(setq lyskom-filter-hack nil)
(let (subject text-stat)
;;
;; Extract the text-stat which is the last element of data
;; Next shorten the list in data to exclude the text-stat.
;;
(setq text-stat (elt data (- (length data) 1)))
(if (= (length data) 1)
(setq data nil)
(rplacd (nthcdr (- (length data) 2) data) nil))
;;
;; Extract the subject
;;
(let ((str (text->decoded-text-mass text text-stat)))
(cond ((string-match "\n" str)
(setq subject (substring str 0 (match-beginning 0))))
(t (setq subject ""))))
;;
;; Do the checking
;;
(setq lyskom-filter-hack
(lyskom-check-filter-list text-stat
author
data
subject
(text->decoded-text-mass text text-stat)
lyskom-filter-list)))))
(defun lyskom-check-filter-list (text-stat
author
recipient-list
subject
text
filter-list)
(let (tmp)
(while filter-list
(condition-case nil
(if (functionp (filter->function (car filter-list)))
(setq tmp (funcall (filter->function (car filter-list))
(car filter-list)
author
recipient-list
subject
text-stat
text)))
(error nil))
(if tmp
(setq filter-list nil)
(setq filter-list (cdr filter-list))))
tmp))
;;;========================================
;;; The filter compiler.
;;;
(defmacro lyskom-filter-is-member (testfn arg list selector)
`(let (found
(objlist ,list))
(while (and objlist (not found))
(and (,testfn ,arg (,selector (car objlist)))
(setq found t))
(setq objlist (cdr objlist)))
found))
(defun lyskom-create-compile-filter-function (pattern)
(if (null pattern)
(byte-compile
'(lambda (filter author recipient-list subject text-stat text) nil))
(byte-compile (lyskom-create-filter-function pattern))))
(defun lyskom-create-filter-function (pattern)
`(lambda (filter author recipient-list subject text-stat text)
,(cons 'and (lyskom-create-filter-function-body pattern))))
(defun lyskom-create-filter-function-body (pattern)
(let (inverse)
(cond
;;
;; End of pattern
;;
((null pattern) '((filter->attribute filter 'action)))
;;
;; Bad pattern
;;
((or (not (listp pattern))
(not (listp (car pattern))))
(lyskom-error
"%s"
(lyskom-get-string 'filter-error-specification)))
;;
;; Assume valid pattern
;;
(t
(let ((key (car (car pattern)))
(args (cdr (car pattern)))
(form nil))
(if (eq key 'not)
(if (not (listp args))
(lyskom-error "%s" (lyskom-get-string 'filter-error-bad-not))
(setq key (car args) args (cdr args) inverse t)))
(setq form
(cond
((eq key 'author)
(lyskom-filter-check-args 'stringp args)
`(and author (string-match ,(regexp-quote args)
(conf-stat->name author))))
((eq key 'author-re)
(lyskom-filter-check-args 'regexpp args)
`(and author (string-match ,args
(conf-stat->name author))))
((eq key 'author-no)
(lyskom-filter-check-args 'integerp args)
`(and author (= ,args (conf-stat->conf-no author))))
((eq key 'recipient)
(lyskom-filter-check-args 'stringp args)
`(lyskom-filter-is-member
string-match
,(regexp-quote args)
recipient-list
conf-stat->name))
((eq key 'recipient-re)
(lyskom-filter-check-args 'regexpp args)
`(lyskom-filter-is-member
string-match
,args
recipient-list
conf-stat->name))
((eq key 'recipient-no)
(lyskom-filter-check-args 'integerp args)
`(lyskom-filter-is-member
=
,args
recipient-list
conf-stat->conf-no))
((eq key 'subject)
(lyskom-filter-check-args 'stringp args)
`(string-match ,(regexp-quote args)
subject))
((eq key 'subject-re)
(lyskom-filter-check-args 'regexpp args)
`(string-match ,args subject))
((eq key 'text)
(lyskom-filter-check-args 'stringp args)
`(string-match ,(regexp-quote args) text))
((eq key 'text-re)
(lyskom-filter-check-args 'regexpp args)
`(string-match ,args text))
(t (lyskom-error
(lyskom-get-string 'filter-error-unknown-key)
key
))))
(if inverse (setq form (list 'not form)))
(cons form (lyskom-create-filter-function-body (cdr pattern))))))))
(defun lyskom-filter-check-args (fn arg)
(if (not (funcall fn arg))
(lyskom-error (lyskom-get-string 'filter-error-key-arg)
fn arg)))
;;; ============================================================
;;; lyskom-filter-prompt
;;;
;;; Print a notice that a text has been filtered.
;;;
(defun lyskom-filter-prompt (text-no prompt)
(setq lyskom-filter-hack t)
(let ((text-stat (blocking-do 'get-text-stat text-no))
(subject nil))
(if text-stat
(blocking-do-multiple
((text (get-text text-no))
(conf-stat (get-conf-stat
(text-stat->author text-stat))))
(if text
(let ((str (text->decoded-text-mass text text-stat)))
(setq subject
(if (string-match "\n" str)
(substring str 0 (match-beginning 0))
str))
(lyskom-format-insert prompt
text-stat
subject
(or conf-stat
(text-stat->author text-stat)))
(lyskom-scroll))))))
(setq lyskom-filter-hack nil))
;;;========================================
;;; User functions and support functions
;;;
(defun lyskom-add-filter (filter)
"Add the filter FILTER to the LysKOM filtering mechanism."
(if (filter->attribute filter 'expire)
(setq kom-session-filter-list (cons filter
kom-session-filter-list))
(progn
(setq kom-permanent-filter-list (cons filter kom-permanent-filter-list))
(lyskom-save-options (current-buffer)
(lyskom-get-string 'filter-edit-saving)
(lyskom-get-string 'filter-edit-saving-done)
(lyskom-get-string 'filter-edit-saving-error))))
(setq lyskom-filter-list
(cons filter lyskom-filter-list)))
(defun lyskom-filter-read-action ()
"Read a filter action from the minibuffer, returning its symbol"
(let ((completion-ignore-case t))
(car
(rassoc
(lyskom-completing-read (lyskom-get-string 'filter-action)
(lyskom-maybe-frob-completion-table
(lyskom-reverse-pairs
lyskom-filter-actions))
nil
nil
(cdr (car lyskom-filter-actions))
t)
lyskom-filter-actions))))
(defun lyskom-filter-read-permanent ()
"Ask the user is a filter is permanent and return t in this case.
Otherwise return nil."
(lyskom-j-or-n-p (lyskom-get-string 'filter-permanent)))
;;;========================================
;;; Filtrera rende --- Filter subject
;;;
(def-kom-command kom-filter-subject (&optional subject)
"Interactively filter a subject. This creates a permanent or temporary
filter for a single subject in one conference or all conferences.
An alternative to this is `kom-super-jump'.
To change existing filters, use `kom-filter-edit'."
(interactive)
(when (not (eq 0 lyskom-current-conf))
(let* (conf perm filter action)
(setq subject (lyskom-read-from-minibuffer
(lyskom-get-string 'filter-subject)
(or subject lyskom-current-subject)))
(setq filter (cons (cons 'subject subject) filter))
(setq conf (lyskom-read-conf-no 'filter-in-conf
'(all) t nil t))
(if (not (eq conf 0))
(setq filter (cons (cons 'recipient-no conf) filter)))
(setq action (lyskom-filter-read-action))
(setq perm (lyskom-filter-read-permanent))
(lyskom-add-filter
(lyskom-make-filter filter
(list (cons 'action action)
(cons 'expire (not perm))))))))
;;;========================================
;;; Filtrera frfattare --- Filter author
;;;
(def-kom-command kom-filter-author ()
"Interactively filter an author. This creates a permanent or
temporary filter on a single author in one conference or all
conferences.
To change existing filters, use `kom-filter-edit'."
(interactive)
(let (author conf filter action permanent)
(setq author (lyskom-read-conf-no 'filter-author '(pers) t nil t))
(if (not (eq author 0))
(setq filter (cons (cons 'author-no author) filter)))
(setq conf (lyskom-read-conf-no 'filter-in-conf
'(all) t nil t))
(if (not (eq conf 0))
(setq filter (cons (cons 'recipient-no conf) filter)))
(setq action (lyskom-filter-read-action))
(setq permanent (lyskom-filter-read-permanent))
(lyskom-add-filter
(lyskom-make-filter filter
(list (cons 'action action)
(cons 'expire (not permanent)))))))
(def-kom-command kom-filter-recipient ()
"Interactively filter a recipient. This creates a permanent or
temporary filter on a particular recipient.
To change existing filters, use `kom-filter-edit'."
(interactive)
(let ((conf-no (lyskom-read-conf-no 'filter-recipient
'(all) nil nil t))
(action (lyskom-filter-read-action))
(permanent (lyskom-filter-read-permanent)))
(cond ((and conf-no (not (zerop conf-no)))
(lyskom-add-filter
(lyskom-make-filter (list (cons 'recipient-no conf-no))
(list (cons 'action action)
(cons 'expire (not permanent)))))
))))
;;;============================================================
;;;
;;; Superhoppa
;;;
(def-kom-command kom-super-jump (text-no)
"Skip all texts and comments that share the subject and recipient of
the selected text. This creates a temporary filter on the subject of
the selected text in one of its recipients. The recipient is selected
automatically: if the current conference is a recipient, then filter
in that conference. Otherwise filter in the first recipient that the
user is a member of.
To change existing filters, use `kom-filter-edit'.
This command accepts text number prefix arguments \(see
`lyskom-read-text-no-prefix-arg')."
(interactive (list (lyskom-read-text-no-prefix-arg 'super-jump-q)))
(if (or (null lyskom-current-text)
(zerop lyskom-current-text))
(lyskom-insert-string 'have-to-read)
(let ((text-stat (blocking-do 'get-text-stat lyskom-current-text))
(all-recipients nil)
(recipients-member nil)
(cc-recipients-member nil)
(bcc-recipients-member nil)
(recipients-nonmember nil)
(cc-recipients-nonmember nil)
(bcc-recipients-nonmember nil)
(filter-recipient nil))
;; Extract recipients into different lists
(lyskom-traverse misc
(text-stat->misc-info-list text-stat)
(when (memq (misc-info->type misc) lyskom-recpt-types-list)
(let* ((conf-no (misc-info->recipient-no misc))
(symbol
(if (lyskom-get-membership conf-no)
(cond ((eq (misc-info->type misc) 'RECPT)
'recipients-member)
((eq (misc-info->type misc) 'CC-RECPT)
'cc-recipients-member)
((eq (misc-info->type misc) 'BCC-RECPT)
'bcc-recipients-member))
(cond ((eq (misc-info->type misc) 'RECPT)
'recipients-nonmember)
((eq (misc-info->type misc) 'CC-RECPT)
'cc-recipients-nonmember)
((eq (misc-info->type misc) 'BCC-RECPT)
'bcc-recipients-nonmember)))))
(set symbol (cons conf-no (symbol-value symbol)))
(setq all-recipients (cons conf-no all-recipients)))))
;; Get the recipient to filter in
(setq filter-recipient
(or (and (memq lyskom-current-conf all-recipients) lyskom-current-conf)
(car (nreverse recipients-member))
(car (nreverse cc-recipients-member))
(car (nreverse bcc-recipients-member))
(car (nreverse recipients-nonmember))
(car (nreverse cc-recipients-nonmember))
(car (nreverse bcc-recipients-nonmember))))
(if (null filter-recipient)
(lyskom-insert-string 'no-recipient)
(let ((text lyskom-current-subject))
(when (string-match "^\\s-*$" lyskom-current-subject) (setq text ""))
(lyskom-add-filter
(lyskom-make-filter (list
(cons 'subject-re
(concat (if (string-equal text "") "^" "")
"\\([rR][eE]: *\\|[Ff][Ww][Dd]: *\\)*"
(replace-in-string
(regexp-quote text)
"[ \t]+" "[ \t]+")
(if (string-equal text "") "$" "")))
(cons 'recipient-no filter-recipient))
(list (cons 'action 'skip-tree)
(cons 'expire t))))
(lyskom-format-insert 'super-jump
(copy-sequence lyskom-current-subject)
filter-recipient))))))
;;;============================================================
;;;
;;; Filtrera text
;;;
(def-kom-command kom-filter-text (&optional text)
"Interactively filter on text contents. This creates a permanent or
temporary filter on the contents of texts in all conferences or in a
single conference.
To change existing filters, use `kom-filter-edit'."
(interactive)
(when (not (eq 0 lyskom-current-conf))
(let ((conf nil)
(action nil)
(perm nil)
(filter nil))
(setq text
(lyskom-read-from-minibuffer (lyskom-get-string
'filter-which-text)
(or text "")))
(setq filter (cons (cons 'text text) filter))
(setq conf (lyskom-read-conf-no 'filter-in-conf
'(all) t nil t))
(if (not (eq conf 0))
(setq filter (cons (cons 'recipient-no conf) filter)))
(setq action (lyskom-filter-read-action))
(setq perm (lyskom-filter-read-permanent))
(lyskom-add-filter
(lyskom-make-filter filter
(list (cons 'action action)
(cons 'expire (not perm))))))))
;;;============================================================
;;; Lista filter (kom-list-filters)
;;;
;;; Author: David Byers
;;; Calls internal functions in filter-edit mode. This may or
;;; may not be a good idea, but it works...
(def-kom-command kom-list-filters ()
"Display all filters. This lists all filters in the LysKOM buffer.
To change existing filters, use `kom-filter-edit'."
(interactive)
(let ((filters lyskom-filter-list))
(goto-char (point-max))
(if (null filters)
(lyskom-insert (lyskom-get-string 'no-filters))
(progn
(lyskom-insert (lyskom-get-string 'view-filters-header))
(while filters
(goto-char (point-max))
(lyskom-format-filter-pattern (car filters))
(setq filters (cdr filters)))
(lyskom-insert (lyskom-get-string 'view-filters-footer))))))
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