Use get-language-info to get the default coding-system.
[riece] / lisp / riece-log.el
index f8d6b47..e1c0a74 100644 (file)
@@ -1,7 +1,9 @@
 ;;; riece-log.el --- saving irc logs add-on
 ;; Copyright (C) 2003 OHASHI Akira
+;; Copyright (C) 2004 Daiki Ueno
 
 ;; Author: OHASHI Akira <bg66@koka-in.org>
+;;     Daiki Ueno <ueno@unixuser.org>
 ;; Keywords: IRC, riece
 
 ;; This file is part of Riece.
@@ -53,7 +55,8 @@
   "*If non-nil, irc messages flash back from log files.
 If integer, flash back only this line numbers. t means all lines."
   :type '(choice (integer :tag "line numbers")
-                (boolean :tag "flash back or not"))
+                (const t :tag "of the day")
+                (const nil :tag "no flashback"))
   :group 'riece-log)
 
 (defcustom riece-log-coding-system nil
@@ -68,10 +71,25 @@ If integer, flash back only this line numbers. t means all lines."
   :type 'symbol
   :group 'riece-log)
 
-(defcustom riece-log-open-directory-function 'find-file
-  "*Function for opening a directory."
-  :type 'function
-  :group 'riece-log)
+(defface riece-log-date-face
+  '((((class color)
+      (background dark))
+     (:foreground "Gray70"))
+    (((class color)
+      (background light))
+     (:foreground "DimGray"))
+    (t
+     (:bold t)))
+  "Face used for displaying \"(YYYY/MM/dd)\" extent."
+  :group 'riece-highlight-faces)
+(defvar riece-log-date-face 'riece-log-date-face)
+
+(defvar riece-log-lock-file nil
+  "Lock file for riece-log.
+It is created if there is at least one instance of Emacs running riece-log.")
+
+(defconst riece-log-file-name-regexp
+  (concat (riece-make-interval-regexp "[0-9]" 8) "\\.txt\\(\\.\\(.*\\)\\)?$"))
 
 (defvar riece-log-enabled nil)
 
@@ -80,56 +98,57 @@ If integer, flash back only this line numbers. t means all lines."
 
 (defun riece-log-display-message-function (message)
   (if riece-log-enabled
-      (let ((file (riece-log-get-file (riece-message-target message)))
-           (coding-system-for-write riece-log-coding-system))
+      (let ((coding-system-for-write
+            (if (featurep 'mule)
+                (or riece-log-coding-system
+                    (car (get-language-info current-language-environment
+                                            'coding-system)))))
+           (file (riece-log-make-file-name (riece-message-target message)
+                                           coding-system-for-write))
+           file-name-coding-system
+           default-file-name-coding-system)
        (unless (file-directory-p (file-name-directory file))
          (make-directory (file-name-directory file) t))
        (write-region (concat (format-time-string "%H:%M") " "
                              (riece-format-message message))
-                     nil file t 0))))
-
-(defun riece-log-get-file (identity)
-  (expand-file-name
-   (concat (format-time-string "%Y%m%d") ".log")
-   (riece-log-get-directory identity)))
-
-(defun riece-log-get-files (identity)
-  (let ((files (directory-files (riece-log-get-directory identity) t
-                               (concat "^"
-                                       (riece-make-interval-regexp "[0-9]" 8)
-                                       "\\.log$")
-                               t)))
-    (nreverse (sort files #'string-lessp))))
-
-(defun riece-log-get-directory (identity)
-  (let ((channel (riece-identity-canonicalize-prefix
-                 (riece-identity-prefix identity)))
-       (server (riece-identity-server identity))
-       (map (assoc (riece-format-identity identity) riece-log-directory-map))
-       name)
-    (cond (map (setq name (cdr map)))
-         ((string-match riece-strict-channel-regexp channel)
-          (let ((suffix (match-string 2 channel)))
-            (setq name (substring channel (match-end 1) (match-beginning 2)))
-            (when (and (stringp suffix)
-                       (string-match "^:\\*\\.\\(.*\\)" suffix))
-              (setq name (concat name "-" (match-string 1 suffix))))))
-         (t (setq name "priv")))
-    (if server
-       (expand-file-name name (expand-file-name server riece-log-directory))
-      (expand-file-name name riece-log-directory))))
-
-(defun riece-log-get-directory-1 (identity)
+                     nil file t 0
+                     riece-log-lock-file))))
+
+(defun riece-log-make-file-name (identity coding-system)
+  (expand-file-name (if (featurep 'mule)
+                       (format "%s.txt.%s"
+                               (format-time-string "%Y%m%d")
+                               coding-system)
+                     (format "%s.txt"
+                               (format-time-string "%Y%m%d")))
+                   (riece-log-directory identity)))
+
+(defun riece-log-list-files (identity time)
+  (let ((directory (riece-log-directory identity))
+       (time-prefix (format-time-string "%Y%m%d" (or time '(0 0))))
+       files)
+    (when (file-directory-p directory)
+      (setq files (nreverse (sort (directory-files
+                                  directory t
+                                  (concat "^" riece-log-file-name-regexp)
+                                  t)
+                                 #'string-lessp)))
+      (while (and files
+                 (string-lessp (file-name-nondirectory (car files))
+                               time-prefix))
+       (setq files (cdr files)))
+      files)))
+
+(defun riece-log-directory (identity)
   (let ((prefix (riece-identity-canonicalize-prefix
                 (riece-identity-prefix identity)))
        (server (riece-identity-server identity))
-       (map (assoc (riece-format-identity identity) riece-log-directory-map))
-       name)
+       (map (assoc (riece-format-identity identity) riece-log-directory-map)))
     (if map
-       (setq name (cdr map))
+       (expand-file-name (cdr map) riece-log-directory)
       (expand-file-name (riece-log-encode-file-name prefix)
                        (expand-file-name
-                        (riece-log-encode-file-name (concat "." server))
+                        (concat "." (riece-log-encode-file-name server))
                         riece-log-directory)))))
 
 (defun riece-log-encode-file-name (file-name)
@@ -139,27 +158,26 @@ If integer, flash back only this line numbers. t means all lines."
                                  riece-log-file-name-coding-system)))
   (let ((index 0)
        c)
-    (while (string-match "[^-0-9A-Za-z=_\x80-\xFF]" file-name index)
-      (setq c (aref file-name (match-beginning 0))
-           file-name (replace-match
-                      (if (eq c ?=)
-                          "=="
-                        (format "=%02X" c))
-                      nil t file-name)
-           index (+ 3 index)))
+    (while (string-match "[^-0-9A-Za-z_\x80-\xFF]" file-name index)
+      (setq c (aref file-name (match-beginning 0)))
+      (if (eq c ?=)
+         (setq file-name (replace-match "==" nil t file-name)
+               index (1+ (match-end 0)))
+       (setq file-name (replace-match (format "=%02X" c) nil t file-name)
+             index (+ 2 (match-end 0)))))
     file-name))
 
 (defun riece-log-decode-file-name (file-name)
   (let ((index 0))
     (while (string-match "==\\|=\\([0-7][0-9A-F]\\)" file-name index)
       (setq file-name (replace-match
-                      (if (eq (aref file-name (match-end 0)) ?=)
+                      (if (eq (aref file-name (1- (match-end 0))) ?=)
                           "="
                         (char-to-string
                          (car (read-from-string
                                (concat "?\\x" (match-string 1 file-name))))))
                       nil t file-name)
-           index (1+ index)))
+           index (1+ (match-beginning 0))))
     file-name)
   (if riece-log-file-name-coding-system
       (setq file-name
@@ -167,70 +185,91 @@ If integer, flash back only this line numbers. t means all lines."
                                  riece-log-file-name-coding-system)))
   file-name)
 
-(defun riece-log-flashback-1 (identity)
-  (if (eq riece-log-flashback t)
-      (let ((file (riece-log-get-file identity)))
-       (if (file-exists-p file)
-           (insert-file-contents file)))
-    (let ((files (riece-log-get-files identity))
-         (lines (- riece-log-flashback))
-         date point)
-      (while (and (< lines 0) files)
-       (if (and (file-exists-p (car files))
-                (string-match (concat "\\("
-                                      (riece-make-interval-regexp "[0-9]" 4)
-                                      "\\)\\("
-                                      (riece-make-interval-regexp "[0-9]" 2)
-                                      "\\)\\("
-                                      (riece-make-interval-regexp "[0-9]" 2)
-                                      "\\).log$")
-                              (car files)))
-           (save-restriction
-             (narrow-to-region (point-min) (point-min))
-             (setq date (concat " (" (match-string 1 (car files)) "/"
-                                (match-string 2 (car files)) "/"
-                                (match-string 3 (car files)) ")"))
-             (insert-file-contents (car files))
-             (goto-char (point-max))
-             (setq lines (forward-line lines)
-                   point (point))
-             (while (not (eobp))
-               (end-of-line)
-               (insert date)
-               (forward-line))
-             (goto-char point)))
-       (setq files (cdr files)))
-      (if (zerop lines)
-         (delete-region (point-min) (point))))))
+(defun riece-log-insert (identity lines)
+  "Insert logs for IDENTITY at most LINES.
+If LINES is t, insert today's logs entirely."
+  (let* (file-name-coding-system
+        default-file-name-coding-system
+        (files (riece-log-list-files identity
+                                     (if (eq lines t) (current-time))))
+        name coding-system date point)
+    (while (and (or (eq lines t) (> lines 0)) files)
+      (save-restriction
+       (narrow-to-region (point) (point))
+       (if (and (string-match
+                 (concat "^" riece-log-file-name-regexp)
+                 (setq name (file-name-nondirectory (car files))))
+                (match-beginning 2))
+           (progn
+             (setq coding-system
+                   (intern (substring name (match-beginning 2))))
+             (if (featurep 'xemacs)
+                 (setq coding-system (find-coding-system coding-system))
+               (unless (coding-system-p coding-system)
+                 (setq coding-system nil)))
+             (if coding-system
+                 (let ((coding-system-for-read coding-system))
+                   (insert-file-contents (car files)))
+               ;;don't insert file contents if they use non
+               ;;supported coding-system.
+               ))
+         ;;if the filename has no coding-system suffix, decode with
+         ;;riece-log-coding-system.
+         (let ((coding-system-for-read riece-log-coding-system))
+           (insert-file-contents (car files))))
+       ;;lines in the file contents are in reversed order.
+       (unless (eq lines t)
+         (goto-char (point-max))
+         (setq lines (- (forward-line (- lines))))
+         (delete-region (point-min) (point)))
+       ;;add (YYYY/MM/dd) suffix on each line left in the current buffer.
+       (unless (equal (substring name 0 8) (format-time-string "%Y%m%d"))
+         (setq date (concat " (" (substring name 0 4) "/"
+                            (substring name 4 6) "/"
+                            (substring name 6 8) ")"))
+         (while (not (eobp))
+           (end-of-line)
+           (setq point (point))
+           (insert date)
+           (put-text-property point (point)
+                              'riece-overlay-face 'riece-log-date-face)
+           (forward-line))
+         (goto-char (point-min))))
+      (setq files (cdr files)))))
 
 (defun riece-log-flashback (identity)
   (when riece-log-flashback
+    (riece-insert-info (current-buffer)
+                      (if (eq riece-log-flashback t)
+                          "Recent messages of the day:\n"
+                        (format "Recent messages up to %d lines:\n"
+                                riece-log-flashback)))
     (let (buffer-read-only
          (point (goto-char (point-max))))
       (insert (with-temp-buffer
-               (riece-log-flashback-1 identity)
+               (riece-log-insert identity riece-log-flashback)
                (buffer-string)))
       (goto-char point)
       (while (re-search-forward
-             "^[0-9][0-9]:[0-9][0-9] [<>]\\([^<>]+\\)[<>] " nil t)
-       (put-text-property (match-beginning 1) (match-end 1)
+             (concat "^" riece-time-prefix-regexp
+                      "\\(<[^>]+>\\|>[^<]+<\\|([^)]+)\\|{[^}]+}\\|=[^=]+=\\)")
+             nil t)
+       (put-text-property (1+ (match-beginning 1)) (1- (match-end 1))
                           'riece-identity
                           (riece-make-identity
-                           (riece-match-string-no-properties 1)
+                           (buffer-substring (1+ (match-beginning 1))
+                                             (1- (match-end 1)))
                            (riece-identity-server identity))))
-      (when (and (memq 'riece-button riece-addons)
-                riece-button-enabled)
-       (riece-button-update-buffer))
-      (goto-char (point-max))
+      (run-hook-with-args 'riece-after-insert-functions
+                         point (goto-char (point-max)))
       (set-window-point (get-buffer-window (current-buffer))
                        (point)))))
 
-(defun riece-log-open-directory (&optional channel)
+(defun riece-log-dired (&optional channel)
   (interactive)
-  (let ((directory (riece-log-get-directory
-                   (or channel riece-current-channel))))
+  (let ((directory (riece-log-directory (or channel riece-current-channel))))
     (if (file-directory-p directory)
-       (funcall riece-log-open-directory-function directory)
+       (dired directory)
       (error "No log directory"))))
 
 (defun riece-log-requires ()
@@ -238,6 +277,13 @@ If integer, flash back only this line numbers. t means all lines."
       '(riece-button)))
 
 (defun riece-log-insinuate ()
+  (make-directory riece-log-directory t)
+  (setq riece-log-lock-file
+       (expand-file-name (format "!%s-%d-%d"
+                                 (riece-log-encode-file-name (system-name))
+                                 (user-uid)
+                                 (emacs-pid))
+                         riece-log-directory))
   ;; FIXME: Use `riece-after-insert-functions' for trapping change,
   ;; notice, wallops and so on. But must add argument.
   (add-hook 'riece-after-display-message-functions
@@ -247,7 +293,7 @@ If integer, flash back only this line numbers. t means all lines."
 
 (defvar riece-command-mode-map)
 (defun riece-log-enable ()
-  (define-key riece-command-mode-map "\C-cd" 'riece-log-open-directory)
+  (define-key riece-command-mode-map "\C-cd" 'riece-log-dired)
   (setq riece-log-enabled t))
 
 (defun riece-log-disable ()