--- /dev/null
+;;; gnus-namazu.el --- Search mail with Namazu.
+
+;; Copyright (C) 2000,2001 Tsuchiya Masatoshi <tsuchiya@namazu.org>
+
+;; Author: Tsuchiya Masatoshi <tsuchiya@namazu.org>
+;; Keywords: mail searching namazu
+
+;;; Copyright:
+
+;; This file is a part of Semi-Gnus.
+
+;; This program 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.
+
+;; This program 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 this program; if not, you can either send email to this
+;; program's maintainer or write to: The Free Software Foundation,
+;; Inc.; 59 Temple Place, Suite 330; Boston, MA 02111-1307, USA.
+
+
+;;; Commentary:
+
+;; This file defines the command to search mails with Namazu and
+;; browse its results with Gnus. This module requires the external
+;; command Namazu. Visit the following page for more information.
+;;
+;; http://namazu.org/
+
+
+;;; Install:
+
+;; Make index of articles with Namzu before using this module.
+;;
+;; % mkdir ~/News/namazu
+;; % mknmz -a -h -O ~/News/namazu ~/Mail
+;;
+;; When you put index files of Namazu into the directory other than
+;; the default one (~/News/namazu), it is necessary to put this
+;; expression to your ~/.gnus, in order to set the path of index files
+;; to `gnus-namazu-index-directories'.
+;;
+;; (setq gnus-namazu-index-directories
+;; (list (expand-file-name "~/namazu")))
+;;
+;; If you would like to use this module in Gnus (not T-gnus), put this
+;; file into the lisp/ directory in the Gnus source tree and run `make
+;; install'. And then, put the following expressions into your ~/.gnus.
+;;
+;; (require 'gnus-namazu)
+;; (gnus-namazu-insinuate)
+
+
+;;; Usage:
+
+;; In group buffer or in summary buffer, type C-c C-n query RET.
+
+
+;;; Code:
+
+(eval-when-compile (require 'cl))
+(require 'nnoo)
+(require 'nnheader)
+(require 'nnmail)
+(require 'gnus-sum)
+
+;; It is required for Mule 2.3. See the file Mule23@1934.en.
+(eval-and-compile
+ (autoload 'regexp-opt "regexp-opt"))
+
+;; To suppress byte-compile warning.
+(eval-when-compile
+ (defvar nnml-directory)
+ (defvar nnml-group-alist)
+ (defvar nnmh-directory)
+ (defvar nnmh-group-alist))
+
+
+(defgroup gnus-namazu nil
+ "Search nnmh and nnml groups in Gnus with Namazu."
+ :group 'namazu
+ :group 'gnus
+ :prefix "gnus-namazu-")
+
+(defcustom gnus-namazu-index-directories
+ (list
+ (or (and (boundp 'gnus-namazu-index-directory)
+ (symbol-value 'gnus-namazu-index-directory))
+ (and (boundp 'nnir-namazu-index-directory)
+ (symbol-value 'nnir-namazu-index-directory))
+ (expand-file-name "namazu" gnus-directory)))
+ "*Index directory of Namazu."
+ :type '(repeat directory)
+ :group 'gnus-namazu)
+
+(defcustom gnus-namazu-command
+ (or (and (boundp 'namazu-command)
+ (symbol-value 'namazu-command))
+ (and (boundp 'nnir-namazu-program)
+ (symbol-value 'nnir-namazu-program))
+ "namazu")
+ "*Name of the executable file of Namazu."
+ :group 'gnus-namazu
+ :type 'string)
+
+(defcustom gnus-namazu-additional-arguments nil
+ "*Additional arguments of Namazu.
+The options `-q', `-a', and `-l' are always used, very few other
+options make any sense in this context."
+ :type '(repeat string)
+ :group 'gnus-namazu)
+
+(defcustom gnus-namazu-field-keywords
+ '("date" "from" "newsgroups" "size" "subject" "summary" "to" "uri")
+ "*List of keywords to do field-search."
+ :type '(repeat string)
+ :group 'gnus-namazu)
+
+(defcustom gnus-namazu-coding-system
+ (if (memq system-type '(windows-nt OS/2 emx))
+ (if (boundp 'MULE) '*sjis* 'shift_jis)
+ (if (boundp 'MULE) '*euc-japan* 'euc-japan))
+ "*Coding system for Namazu process."
+ :type 'coding-system
+ :group 'gnus-namazu)
+
+(defcustom gnus-namazu-need-path-normalization
+ (eq system-type 'windows-nt)
+ "*Non-nil means that outputs of namazu may contain a not normalized path."
+ :type 'boolean
+ :group 'gnus-namazu)
+
+(defcustom gnus-namazu-case-sensitive-filesystem
+ (not (eq system-type 'windows-nt))
+ "*Non-nil means that the using file system distinguishes cases of characters."
+ :type 'boolean
+ :group 'gnus-namazu)
+
+
+;;; Internal Variable:
+(defvar gnus-namazu/group-alist nil
+ "Associative list to map groups in lower case to official names.")
+(defconst gnus-namazu/group-name-regexp "\\`nnvirtual:namazu-search\\?")
+
+
+(defmacro gnus-namazu/make-article (group number)
+ `(cons ,group ,number))
+(defmacro gnus-namazu/article-group (x) `(car ,x))
+(defmacro gnus-namazu/article-number (x) `(cdr ,x))
+
+(defsubst gnus-namazu/indexed-servers ()
+ "Choice appropriate servers from opened ones, and return thier list."
+ (append
+ (gnus-servers-using-backend 'nnml)
+ (gnus-servers-using-backend 'nnmh)))
+
+(defun gnus-namazu/setup ()
+ (add-to-list 'gnus-group-name-charset-group-alist
+ (cons gnus-namazu/group-name-regexp gnus-namazu-coding-system))
+ (unless gnus-namazu-case-sensitive-filesystem
+ ;; FIXME: The alist to map group names in lower case to real names
+ ;; is reconstructed every when gnus-namazu/setup() is called.
+ ;; This reconstruction make gnus-namazu-search() slow.
+ (setq gnus-namazu/group-alist nil)
+ (dolist (server (gnus-namazu/indexed-servers))
+ (dolist (group (gnus-namazu/request-list server))
+ (let ((name (gnus-group-prefixed-name group server)))
+ (unless (assoc name gnus-namazu/group-alist)
+ (push (cons (downcase name) name) gnus-namazu/group-alist)))))))
+
+(defun gnus-namazu/shutdown ()
+ (setq gnus-namazu/group-alist nil))
+(add-hook 'gnus-exit-gnus-hook 'gnus-namazu/shutdown)
+
+(defun gnus-namazu/request-list (server)
+ "Return groups of the server SERVER."
+ (and (memq (car server) '(nnml nnmh))
+ (nnoo-change-server (car server) (nth 1 server) (nthcdr 2 server))
+ (gnus-request-list server)
+ (mapcar (function car)
+ (if (eq 'nnml (car server))
+ nnml-group-alist
+ nnmh-group-alist))))
+
+(defun gnus-namazu/server-directory (server)
+ "Return the top directory of the server SERVER."
+ (and (memq (car server) '(nnml nnmh))
+ (nnoo-change-server (car server) (nth 1 server) (nthcdr 2 server))
+ (file-name-as-directory
+ (expand-file-name (if (eq 'nnml (car server))
+ nnml-directory
+ nnmh-directory)))))
+
+;;; Functions to call Namazu.
+(defsubst gnus-namazu/normalize-results ()
+ "Normalize file names returned by Namazu in this current buffer."
+ (goto-char (point-min))
+ (while (not (eobp))
+ (when (if gnus-namazu-need-path-normalization
+ (or (not (looking-at "/\\(.\\)|/"))
+ (replace-match "\\1:/"))
+ (eq ?~ (char-after (point))))
+ (insert (expand-file-name
+ (buffer-substring (gnus-point-at-bol) (gnus-point-at-eol))))
+ (delete-region (point) (gnus-point-at-eol)))
+ (forward-line 1)))
+
+(defsubst gnus-namazu/call-namazu (query)
+ (let ((coding-system-for-read gnus-namazu-coding-system)
+ (coding-system-for-write gnus-namazu-coding-system)
+ (default-process-coding-system
+ (cons gnus-namazu-coding-system gnus-namazu-coding-system))
+ (file-name-coding-system gnus-namazu-coding-system)
+ (pathname-coding-system gnus-namazu-coding-system))
+ (apply 'call-process
+ `(,gnus-namazu-command
+ nil ; input from /dev/null
+ t ; output
+ nil ; don't redisplay
+ "-q" ; don't be verbose
+ "-a" ; show all matches
+ "-l" ; use list format
+ ,@gnus-namazu-additional-arguments
+ ,query
+ ,@gnus-namazu-index-directories))))
+
+(defsubst gnus-namazu/group-prefixed-name (group method)
+ "Return the whole name from GROUP and METHOD."
+ (if gnus-namazu-case-sensitive-filesystem
+ (gnus-group-prefixed-name group method)
+ (let ((name (gnus-group-prefixed-name group method)))
+ (or (cdr (assoc (downcase name) gnus-namazu/group-alist))
+ name))))
+
+(defun gnus-namazu/search (groups query)
+ (with-temp-buffer
+ (let ((exit-status (gnus-namazu/call-namazu query)))
+ (unless (zerop exit-status)
+ (error "Namazu finished abnormally: %d" exit-status))
+ (let* ((articles)
+ (server-alist
+ (delq nil
+ (let (dir)
+ (mapcar
+ (lambda (s)
+ (when (setq dir (gnus-namazu/server-directory s))
+ (cons (file-name-as-directory dir) s)))
+ (gnus-namazu/indexed-servers)))))
+ (topdir-regexp (regexp-opt (mapcar 'car server-alist))))
+ (gnus-namazu/normalize-results)
+ (goto-char (point-min))
+ (while (not (eobp))
+ (let (server group file)
+ (and (looking-at topdir-regexp)
+ ;; Check a discovered file is managed by Gnus servers.
+ (setq file (buffer-substring-no-properties
+ (match-end 0) (gnus-point-at-eol))
+ server (cdr (assoc (match-string-no-properties 0)
+ server-alist)))
+ ;; Check validity of the file name.
+ (string-match "/\\([0-9]+\\)\\'" file)
+ (progn
+ (setq group (substring file 0 (match-beginning 0))
+ file (match-string 1 file))
+ (setq group
+ (gnus-namazu/group-prefixed-name
+ (nnheader-replace-chars-in-string group ?/ ?.)
+ server))
+ (when (or (not groups)
+ (member group groups))
+ (push (gnus-namazu/make-article
+ group (string-to-number file))
+ articles)))))
+ (forward-line 1))
+ (nreverse articles)))))
+
+
+;;; User Interface:
+(defun gnus-namazu/get-target-groups ()
+ (cond
+ ((eq major-mode 'gnus-group-mode)
+ ;; In Group buffer.
+ (cond
+ (current-prefix-arg
+ (gnus-group-process-prefix current-prefix-arg))
+ (gnus-group-marked
+ (prog1 gnus-group-marked (gnus-group-unmark-all-groups)))))
+ ((eq major-mode 'gnus-summary-mode)
+ ;; In Summary buffer.
+ (if current-prefix-arg
+ (list (gnus-read-group "Group: "))
+ (if (and (gnus-ephemeral-group-p gnus-newsgroup-name)
+ (string-match gnus-namazu/group-name-regexp gnus-newsgroup-name))
+ (cadr (assq 'gnus-namazu-target-groups
+ (gnus-info-method (gnus-get-info gnus-newsgroup-name))))
+ (list gnus-newsgroup-name))))))
+
+(defun gnus-namazu/get-current-query ()
+ (and (eq major-mode 'gnus-summary-mode)
+ (gnus-ephemeral-group-p gnus-newsgroup-name)
+ (string-match gnus-namazu/group-name-regexp gnus-newsgroup-name)
+ (cadr (assq 'gnus-namazu-current-query
+ (gnus-info-method (gnus-get-info gnus-newsgroup-name))))))
+
+(defvar gnus-namazu/read-query-original-buffer nil)
+(defvar gnus-namazu/read-query-prompt nil)
+(defvar gnus-namazu/read-query-history nil)
+
+(defun gnus-namazu/get-current-subject ()
+ (and gnus-namazu/read-query-original-buffer
+ (bufferp gnus-namazu/read-query-original-buffer)
+ (with-current-buffer gnus-namazu/read-query-original-buffer
+ (when (eq major-mode 'gnus-summary-mode)
+ (let ((s (gnus-summary-article-subject)))
+ ;; Remove typically prefixes of mailing lists.
+ (when (string-match
+ "^\\(\\[[^]]*[0-9]+\\]\\|([^)]*[0-9]+)\\)\\s-*" s)
+ (setq s (substring s (match-end 0))))
+ (when (string-match
+ "^\\(Re\\(\\^?\\([0-9]+\\|\\[[0-9]+\\]\\)\\)?:\\s-*\\)+" s)
+ (setq s (substring s (match-end 0))))
+ (when (string-match "\\s-*(\\(re\\|was\\)\\b" s)
+ (setq s (substring s 0 (match-beginning 0))))
+ s)))))
+
+(defun gnus-namazu/get-current-from ()
+ (and gnus-namazu/read-query-original-buffer
+ (bufferp gnus-namazu/read-query-original-buffer)
+ (with-current-buffer gnus-namazu/read-query-original-buffer
+ (when (eq major-mode 'gnus-summary-mode)
+ (cadr (mail-extract-address-components
+ (mail-header-from
+ (gnus-summary-article-header))))))))
+
+(defmacro gnus-namazu/minibuffer-prompt-end ()
+ (if (fboundp 'minibuffer-prompt-end)
+ '(minibuffer-prompt-end)
+ '(point-min)))
+
+(defun gnus-namazu/message (string &rest arguments)
+ (let* ((s1 (concat
+ gnus-namazu/read-query-prompt
+ (buffer-substring (gnus-namazu/minibuffer-prompt-end)
+ (point-max))))
+ (s2 (apply (function format) string arguments))
+ (w (- (window-width)
+ (string-width s1)
+ (string-width s2)
+ 1)))
+ (message (if (>= w 0)
+ (concat s1 (make-string w ?\ ) s2)
+ s2))
+ (if (sit-for 0.3) (message s1))
+ s2))
+
+(defun gnus-namazu/complete-query ()
+ (interactive)
+ (let ((pos (point)))
+ (cond
+ ((and (re-search-backward "\\+\\([a-z]*\\)" nil t)
+ (= pos (match-end 0)))
+ (let* ((partial (match-string 1))
+ (completions
+ (all-completions
+ partial
+ (mapcar 'list gnus-namazu-field-keywords))))
+ (cond
+ ((null completions)
+ (gnus-namazu/message "No completions of %s" partial))
+ ((= 1 (length completions))
+ (goto-char (match-beginning 1))
+ (delete-region (match-beginning 1) (match-end 1))
+ (insert (car completions) ":")
+ (setq pos (point))
+ (gnus-namazu/message "Completed"))
+ (t
+ (let ((x (try-completion partial (mapcar 'list completions))))
+ (if (string= x partial)
+ (if (and (eq last-command
+ 'gnus-namazu/field-keyword-completion)
+ completion-auto-help)
+ (with-output-to-temp-buffer "*Completions*"
+ (display-completion-list completions))
+ (gnus-namazu/message "Sole completion"))
+ (goto-char (match-beginning 1))
+ (delete-region (match-beginning 1) (match-end 1))
+ (insert x)
+ (setq pos (point))))))))
+ ((and (looking-at "\\+subject:")
+ (= pos (match-end 0)))
+ (let ((s (gnus-namazu/get-current-subject)))
+ (when s
+ (goto-char pos)
+ (insert "\"" s "\"")
+ (setq pos (point)))))
+ ((and (looking-at "\\+from:")
+ (= pos (match-end 0)))
+ (let ((f (gnus-namazu/get-current-from)))
+ (when f
+ (goto-char pos)
+ (insert "\"" f "\"")
+ (setq pos (point))))))
+ (goto-char pos)))
+
+(defvar gnus-namazu/read-query-map
+ (let ((keymap (copy-keymap minibuffer-local-map)))
+ (define-key keymap "\t" 'gnus-namazu/complete-query)
+ keymap))
+
+(defun gnus-namazu/read-query (prompt &optional initial)
+ (let ((gnus-namazu/read-query-original-buffer (current-buffer))
+ (gnus-namazu/read-query-prompt prompt))
+ (unless initial
+ (when (setq initial (gnus-namazu/get-current-query))
+ (setq initial (cons initial 0))))
+ (read-from-minibuffer prompt initial gnus-namazu/read-query-map nil
+ 'gnus-namazu/read-query-history)))
+
+(defun gnus-namazu/truncate-article-list (articles)
+ (let ((hit (length articles)))
+ (when (> hit gnus-large-newsgroup)
+ (let* ((cursor-in-echo-area nil)
+ (input
+ (when (> hit gnus-large-newsgroup)
+ (read-from-minibuffer
+ (format
+ "Too many articles were retrieved. How many articles (max %d): "
+ hit)
+ (cons (number-to-string gnus-large-newsgroup) 0)))))
+ (unless (string-match "\\`[ \t]*\\'" input)
+ (setcdr (nthcdr (min (1- (string-to-number input)) hit) articles)
+ nil))))
+ articles))
+
+(defun gnus-namazu-search (groups query)
+ "Search QUERY through GROUPS with Namazu,
+and make a virtual group contains its results."
+ (interactive
+ (list
+ (gnus-namazu/get-target-groups)
+ (gnus-namazu/read-query "Enter query: ")))
+ (gnus-namazu/setup)
+ (let ((articles (gnus-namazu/search groups query)))
+ (if articles
+ (let ((real-groups groups)
+ (vgroup
+ (apply (function format)
+ "nnvirtual:namazu-search?query=%s&groups=%s&id=%d%d%d"
+ query
+ (if groups (mapconcat 'identity groups ",") "ALL")
+ (current-time))
+ gnus-namazu-coding-system))
+ (gnus-namazu/truncate-article-list articles)
+ (unless real-groups
+ (dolist (a articles)
+ (add-to-list 'real-groups (gnus-namazu/article-group a))))
+ ;; Generate virtual group which includes all results.
+ (when (fboundp 'gnus-group-decoded-name)
+ (setq vgroup
+ (encode-coding-string vgroup gnus-namazu-coding-system)))
+ (setq vgroup
+ (gnus-group-read-ephemeral-group
+ vgroup
+ `(nnvirtual ,vgroup
+ (nnvirtual-component-groups ,real-groups)
+ (gnus-namazu-target-groups ,groups)
+ (gnus-namazu-current-query ,query))
+ t (cons (current-buffer) (current-window-configuration)) t))
+ ;; Generate new summary buffer which contains search results.
+ (gnus-group-read-group
+ t t vgroup
+ (sort (delq nil ;; Ad-hoc fix, to avoid wrong-type-argument error.
+ (mapcar
+ (lambda (a)
+ (nnvirtual-reverse-map-article
+ (gnus-namazu/article-group a)
+ (gnus-namazu/article-number a)))
+ articles))
+ '<)))
+ (message "No entry."))))
+
+(defun gnus-namazu-insinuate ()
+ (add-hook
+ 'gnus-group-mode-hook
+ (lambda ()
+ (define-key gnus-group-mode-map "\C-c\C-n" 'gnus-namazu-search)))
+ (add-hook
+ 'gnus-summary-mode-hook
+ (lambda ()
+ (define-key gnus-summary-mode-map "\C-c\C-n" 'gnus-namazu-search))))
+
+(provide 'gnus-namazu)
+
+;; gnus-namazu.el ends here.
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