[Emacs-diffs] Changes to org-irc.el

[Carsten Dominik]

CVSROOT:        /sources/emacs
Module name:    emacs
Changes by:     Carsten Dominik <cdominik>      08/03/13 08:51:58

Index: org-irc.el
===================================================================
RCS file: org-irc.el
diff -N org-irc.el
--- /dev/null   1 Jan 1970 00:00:00 -0000
+++ org-irc.el  13 Mar 2008 08:51:58 -0000      1.1
@@ -0,0 +1,232 @@
+;;; org-irc.el --- Store links to IRC sessions
+;;
+;; Copyright (C) 2008  Free Software Foundation, Inc.
+;;
+;; Author: Philip Jackson <address@hidden>
+;; Keywords: erc, irc, link, org
+;; Version: 1.3
+;;
+;; 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, 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; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+;;
+;;; Commentary:
+;;
+;; Link to an IRC session. Only ERC has been implemented at the
+;; moment.
+;;
+;; This file is loaded by default whenever org.el is loaded.  Please
+;; customize the variable `org-default-extensions' to select extensions
+;; you would like to use, and to deselect those which you don't want.
+;;
+;; Please note that at the moment only ERC is supported. Other clients
+;; shouldn't be diffficult to add though.
+;;
+;; Then set `org-irc-link-to-logs' to non-nil if you would like a
+;; file:/ type link to be created to the current line in the logs or
+;; to t if you would like to create an irc:/ style link.
+;;
+;; Links within an org buffer might look like this:
+;;
+;; [[irc:/irc.freenode.net/#emacs/bob][chat with bob in #emacs on freenode]]
+;; [[irc:/irc.freenode.net/#emacs][#emacs on freenode]]
+;; [[irc:/irc.freenode.net/]]
+;;
+;; If, when the resulting link is visited, there is no connection to a
+;; requested server then one will be created.
+;;
+;;; Code:
+
+
+(eval-when-compile
+  (require 'cl))
+
+(require 'org)
+(require 'erc)
+(require 'erc-log)
+
+(defvar org-irc-client 'erc
+  "The IRC client to act on")
+(defvar org-irc-link-to-logs nil
+  "non-nil will store a link to the logs, nil will store an irc: style link")
+
+(defvar erc-default-port) ; dynamically scoped from erc.el
+(defvar erc-session-port) ; dynamically scoped form erc-backend.el
+(defvar erc-server-announced-name) ; dynamically scoped form erc-backend.el
+
+;; Generic functions/config (extend these for other clients)
+
+(add-to-list 'org-store-link-functions
+             'org-irc-store-link)
+
+(org-add-link-type "irc" 'org-irc-visit nil)
+
+(defun org-irc-visit (link)
+  "Dispatch to the correct visit function based on the client"
+  (let ((link (org-irc-parse-link link)))
+    (cond
+      ((eq org-irc-client 'erc)
+       (org-irc-visit-erc link))
+      (t
+       (error "erc only known client")))))
+
+(defun org-irc-parse-link (link)
+  "Get a of irc link attributes where `link' looks like
+server:port/chan/user (port, chan and user being optional)."
+  (let* ((parts (split-string link "/" t))
+         (len (length parts)))
+    (when (or (< len 1) (> len 3))
+      (error "Failed to parse link needed 1-3 parts, got %d." len))
+    (setcar parts (split-string (car parts) ":" t))
+    parts))
+
+;;;###autoload
+(defun org-irc-store-link ()
+  "Dispatch to the appropreate function to store a link to
+something IRC related"
+  (cond
+    ((eq major-mode 'erc-mode)
+     (org-irc-erc-store-link))))
+
+(defun org-irc-elipsify-description (string &optional after)
+  "Strip starting and ending whitespace and replace any chars
+that appear after the value in `after' with '...'"
+  (let* ((after (number-to-string (or after 30)))
+         (replace-map (list (cons "^[ \t]*" "")
+                            (cons "[ \t]*$" "")
+                            (cons (concat "^\\(.\\{" after
+                                          "\\}\\).*") "\\1..."))))
+    (mapc (lambda (x)
+            (when (string-match (car x) string)
+              (setq string (replace-match (cdr x) nil nil string))))
+          replace-map)
+    string))
+
+;; ERC specific functions
+
+(defun org-irc-erc-get-line-from-log (erc-line)
+  "Find the most suitable line to link to from the erc logs. If
+the user is on the erc-prompt then search backward for the first
+non-blank line, otherwise return the current line. The result is
+a cons of the filename and search string."
+  (erc-save-buffer-in-logs)
+  (with-current-buffer (find-file-noselect (erc-current-logfile))
+    (goto-char (point-max))
+    (list
+     (abbreviate-file-name buffer-file-name)
+     ;; can we get a '::' part?
+     (if (string= erc-line (erc-prompt))
+         (progn
+           (goto-char (point-at-bol))
+           (when (search-backward-regexp "^[^  ]" nil t)
+             (buffer-substring-no-properties (point-at-bol)
+                                             (point-at-eol))))
+         (when (search-backward erc-line nil t)
+           (buffer-substring-no-properties (point-at-bol)
+                                           (point-at-eol)))))))
+
+(defun org-irc-erc-store-link ()
+  "Depending on the variable `org-irc-link-to-logs' store either
+a link to the log file for the current session or an irc: link to
+the session itself."
+  (if org-irc-link-to-logs
+      (let* ((erc-line (buffer-substring-no-properties
+                        (point-at-bol) (point-at-eol)))
+             (parsed-line (org-irc-erc-get-line-from-log erc-line)))
+        (if (erc-logging-enabled nil)
+            (progn
+              (org-store-link-props
+               :type "file"
+               :description (concat "'" (org-irc-elipsify-description
+                                         (cadr parsed-line) 20)
+                                    "' from an IRC conversation")
+               :link (concat "file:" (car parsed-line) "::"
+                             (cadr parsed-line)))
+              t)
+            (error "This ERC session is not being logged")))
+      (let* ((link-text (org-irc-get-erc-link))
+             (link (org-irc-parse-link link-text)))
+        (if link-text
+            (progn
+              (org-store-link-props
+               :type "irc"
+               :link (org-make-link "irc:/" link-text)
+               :description (concat "irc session '" link-text "'")
+               :server (car (car link))
+               :port (or (cadr (pop link)) erc-default-port)
+               :nick (pop link))
+              t)
+            (error "Failed to create ('irc:/' style) ERC link")))))
+
+(defun org-irc-get-erc-link ()
+  "Return an org compatible irc:/ link from an ERC buffer"
+  (let ((link (concat erc-server-announced-name ":"
+                      (number-to-string erc-session-port))))
+    (concat link "/"
+            (if (and (erc-default-target)
+                     (erc-channel-p (erc-default-target))
+                     (car (get-text-property (point) 'erc-data)))
+                ;; we can get a nick
+                (let ((nick (car (get-text-property (point) 'erc-data))))
+                  (concat (erc-default-target) "/" nick))
+                (erc-default-target)))))
+
+(defun org-irc-visit-erc (link)
+  "Visit an ERC buffer based on criteria from the followed link"
+  (let* ((server (car (car link)))
+         (port (or (cadr (pop link)) erc-default-port))
+         (server-buffer)
+         (buffer-list
+          (erc-buffer-filter
+           (lambda nil
+             (let ((tmp-server-buf (erc-server-buffer)))
+               (and tmp-server-buf
+                    (with-current-buffer tmp-server-buf
+                      (and
+                       (string= erc-session-port port)
+                       (string= erc-server-announced-name server)
+                       (setq server-buffer tmp-server-buf)))))))))
+    (if buffer-list
+        (let ((chan-name (pop link)))
+          ;; if we got a channel name then switch to it or join it
+          (if chan-name
+              (let ((chan-buf (find-if
+                               (lambda (x)
+                                 (string= (buffer-name x) chan-name))
+                               buffer-list)))
+                (if chan-buf
+                    (progn
+                      (switch-to-buffer chan-buf)
+                      ;; if we got a nick, and they're in the chan,
+                      ;; then start a chat with them
+                      (let ((nick (pop link)))
+                        (when nick
+                          (if (find nick (erc-get-server-nickname-list)
+                                    :test 'string=)
+                              (progn
+                                (goto-char (point-max))
+                                (insert (concat nick ": ")))
+                              (error "%s not found in %s" nick chan-name)))))
+                    (progn
+                      (switch-to-buffer server-buffer)
+                      (erc-cmd-JOIN chan-name))))
+              (switch-to-buffer server-buffer)))
+        ;; no server match, make new connection
+        (erc-select :server server :port port))))
+
+(provide 'org-irc)
+
+;;; org-irc.el ends here