Added package definition.

[lurk.git] / lurk.el

diff --git a/lurk.el b/lurk.el
index e9c089f..8114597 100644 (file)
--- a/lurk.el
+++ b/lurk.el
@@ -1,13 +1,13 @@
 ;;; lurk.el --- Little Unibuffer iRc Klient -*- lexical-binding:t -*-
 
 ;;; lurk.el --- Little Unibuffer iRc Klient -*- lexical-binding:t -*-
 

-;; Copyright (C) 2021 Tim Vaughan
+;; Copyright (C) 2021--2024 plugd

 
 

-;; Author: Tim Vaughan <timv@ughan.xyz>
+;; Author: plugd <plugd@thelambdalab.xyz>

 ;; Created: 14 June 2021
 ;; Created: 14 June 2021

-;; Version: 1.0
-;; Keywords: network
+;; Version: 2.0

 ;; Homepage: http://thelambdalab.xyz/lurk
 ;; Homepage: http://thelambdalab.xyz/lurk

-;; Package-Requires: ((emacs "26"))
+;; Keywords: comm
+;; Package-Requires: ((emacs "26.1"))

 
 ;; This file is not part of GNU Emacs.
 
 
 ;; This file is not part of GNU Emacs.
 


@@ -26,78 +26,102 @@
 
 ;;; Commentary:
 
 
 ;;; Commentary:
 

+;; A very simple IRC client which uses only a single buffer.
+

 ;;; Code:
 
 (provide 'lurk)
 
 ;;; Code:
 
 (provide 'lurk)
 

+(require 'cl-lib)
+

 
 ;;; Customizations
 
 ;;; Customizations

-;;

 
 (defgroup lurk nil
 
 (defgroup lurk nil

-  "Little Unibuffer iRc Klient."
+  "Multinetwork Unibuffer iRc Klient"

   :group 'network)
 
   :group 'network)
 

-(defcustom lurk-nick "plugd"
-  "Default nick.")
+(defcustom lurk-default-nick "plugd"
+  "Default nick."
+  :type '(string))

 
 (defcustom lurk-default-quit-msg "Bye"
 
 (defcustom lurk-default-quit-msg "Bye"

-  "Default quit message when none supplied.")
+  "Default quit message when none supplied."
+  :type '(string))

 
 (defcustom lurk-networks
 
 (defcustom lurk-networks

-  '(("libera" "irc.libera.chat" 6697))
-  "IRC networks.")
-
-(defcustom lurk-allow-ipv6 nil
-  "Set to non-nil to allow use of IPv6.")
+  '(("libera" "irc.libera.chat" 6697)
+    ("tilde" "tilde.chat" 6697)
+    ("sdf" "irc.sdf.org" 6697))
+  "IRC networks."
+  :type '(alist :key-type string))

 
 (defcustom lurk-show-joins nil
   "Set to non-nil to be notified of joins, parts and quits.")
 
 (defcustom lurk-display-header t
 
 (defcustom lurk-show-joins nil
   "Set to non-nil to be notified of joins, parts and quits.")
 
 (defcustom lurk-display-header t

-  "If non-nil, use buffer header to display information on current host and channel.")
+  "If non-nil, use buffer header to display current host and channel."
+  :type '(boolean))
+
+(defcustom lurk-autoreply-table nil
+  "Table of autoreply messages.
+
+Each autoreply is a list of two elements: (matcher reply)
+
+Here matcher is a list:
+
+(network src cmd params ...)
+
+and reply is another list:
+
+ (cmd params ...)
+
+Each entry in the matcher list is a regular expression tested against the
+corresponding values in the incomming message.  Entries can be nil,
+in which case they match anything."
+  :type '(list (list) (list)))
+

 
 ;;; Faces
 ;;
 
 (defface lurk-text
   '((t :inherit default))
 
 ;;; Faces
 ;;
 
 (defface lurk-text
   '((t :inherit default))

-  "Face used for Lurk text.")
+  "Face used for lurk text.")

 
 (defface lurk-prompt
 
 (defface lurk-prompt

-  '((t :inherit org-priority))
+  '((t :inherit font-lock-keyword-face))

   "Face used for the prompt.")
 
 (defface lurk-context
   "Face used for the prompt.")
 
 (defface lurk-context

-  '((t :inherit org-tag))
+  '((t :inherit lurk-context))

   "Face used for the context name in the prompt.")
 
 (defface lurk-faded
   "Face used for the context name in the prompt.")
 
 (defface lurk-faded

-  '((t :inherit org-agenda-dimmed-todo-face))
-  "Face used for faded Lurk text.")
+  '((t :inherit shadow))
+  "Face used for faded lurk text.")

 
 (defface lurk-timestamp
 
 (defface lurk-timestamp

-  '((t :inherit org-agenda-dimmed-todo-face))
+  '((t :inherit shadow))

   "Face used for timestamps.")
 
 (defface lurk-error
   "Face used for timestamps.")
 
 (defface lurk-error

-  '((t :inherit font-lock-regexp-grouping-construct))
-  "Face used for Lurk error text.")
+  '((t :inherit error))
+  "Face used for lurk error text.")

 
 (defface lurk-notice
 
 (defface lurk-notice

-  '((t :inherit org-upcoming-deadline))
-  "Face used for Lurk notice text.")
+  '((t :inherit warning))
+  "Face used for lurk notice text.")
+

 
 ;;; Global variables
 ;;
 
 
 ;;; Global variables
 ;;
 

-(defvar lurk-version "Lurk v0.1"
+(defvar lurk-version "Lurk v0.0"

   "Value of this string is used in response to CTCP version queries.")
 
 (defvar lurk-notice-prefix "-!-")
   "Value of this string is used in response to CTCP version queries.")
 
 (defvar lurk-notice-prefix "-!-")

-

 (defvar lurk-error-prefix "!!!")
 (defvar lurk-error-prefix "!!!")

-

 (defvar lurk-prompt-string ">")
 
 (defvar lurk-debug nil
 (defvar lurk-prompt-string ">")
 
 (defvar lurk-debug nil


@@ -116,36 +140,65 @@
     nil))
 
 
     nil))
 
 

-;;; Network process
+;;; Network processes

 ;;
 
 ;;
 

-(defvar lurk-response "")
+(defvar lurk-connection-table nil
+  "An alist associating networks to connection information.
+This includes the process and the response string.")

 
 

-(defun lurk-filter (proc string)
-  (dolist (line (split-string (concat lurk-response string) "\n"))
-    (if (string-suffix-p "\r" line)
-        (lurk-eval-msg-string (string-trim line))
-      (setq lurk-response line))))
+(defun lurk-connection-process (network)
+  (elt (assoc network lurk-connection-table) 1))

 
 

-(defun lurk-sentinel (proc string)
-  (unless (equal "open" (string-trim string))
-    (lurk-display-error "Disconnected from server.")
-    (clrhash lurk-contexts)
-    (lurk-set-current-context nil)
-    (lurk-render-prompt)
-    (cancel-timer lurk-ping-timer)))
+(defun lurk-connection-nick (network)
+  (elt (assoc network lurk-connection-table) 2))
+
+(defun lurk-set-connection-nick (network nick)
+  (setf (elt (assoc network lurk-connection-table) 2) nick))
+
+(defun lurk-connection-response (network)
+  (elt (assoc network lurk-connection-table) 3))
+
+(defun lurk-set-connection-response (network string)
+  (setf (elt (assoc network lurk-connection-table) 3) string))
+
+(defun lurk-connection-new (network process nick)
+  (add-to-list 'lurk-connection-table
+               (list network process nick "")))
+
+(defun lurk-connection-remove (network)
+  (setq lurk-connection-table
+        (seq-remove (lambda (row) (equal (car row) network))
+                    lurk-connection-table)))
+
+(defun lurk-make-network-filter (network)
+  (lambda (_proc string)
+    (dolist (line (split-string (concat (lurk-connection-response network) string)
+                                "\n"))
+      (if (string-suffix-p "\r" line)
+          (lurk-eval-msg-string network (string-trim line))
+        (lurk-set-connection-response network line)))))
+
+(defun lurk-make-network-sentinel (network)
+  (lambda (_proc string)
+    (unless (equal "open" (string-trim string))
+      (lurk-display-error "Disconnected from network.")
+      (lurk-connection-remove network)
+      (lurk-remove-network-contexts network)
+      (lurk-highlight-current-context)
+      (lurk-render-prompt))))

 
 (defun lurk-start-process (network)
   (let* ((row (assoc network lurk-networks))
          (host (elt row 1))
          (port (elt row 2))
          (flags (seq-drop row 3)))
 
 (defun lurk-start-process (network)
   (let* ((row (assoc network lurk-networks))
          (host (elt row 1))
          (port (elt row 2))
          (flags (seq-drop row 3)))

-    (make-network-process :name "lurk"
+    (make-network-process :name (concat "lurk-" network)

                           :host host
                           :service port
                           :host host
                           :service port

-                          :family (if lurk-allow-ipv6 nil 'ipv4)
-                          :filter #'lurk-filter
-                          :sentinel #'lurk-sentinel
+                          :family nil
+                          :filter (lurk-make-network-filter network)
+                          :sentinel (lurk-make-network-sentinel network)

                           :nowait nil
                           :tls-parameters (if (memq :notls flags)
                                               nil
                           :nowait nil
                           :tls-parameters (if (memq :notls flags)
                                               nil


@@ -155,40 +208,33 @@
                                                    :hostname host)))
                           :buffer "*lurk*")))
 
                                                    :hostname host)))
                           :buffer "*lurk*")))
 

-(defvar lurk-ping-timer nil)

 (defvar lurk-ping-period 60)
 
 (defvar lurk-ping-period 60)
 

-(defun lurk-ping-function ()
-  (lurk-send-msg (lurk-msg nil nil "PING" (car (process-contact (get-process "lurk")))))
-  (setq lurk-ping-timer (run-with-timer lurk-ping-period nil #'lurk-ping-function)))
+;; IDEA: Have a single ping timer which pings all connected hosts

 
 (defun lurk-connect (network)
 
 (defun lurk-connect (network)

-  (if (get-process "lurk")
-      (lurk-display-error "Already connected.  Disconnect first.")
+  (if (assoc network lurk-connection-table)
+      (lurk-display-error "Already connected to this network")

     (if (not (assoc network lurk-networks))
         (lurk-display-error "Network '" network "' is unknown.")
     (if (not (assoc network lurk-networks))
         (lurk-display-error "Network '" network "' is unknown.")

-      (clrhash lurk-contexts)
-      (lurk-set-current-context nil)
-      (lurk-start-process network)
-      (lurk-send-msg (lurk-msg nil nil "USER" lurk-nick 0 "*" lurk-nick))
-      (lurk-send-msg (lurk-msg nil nil "NICK" lurk-nick))
-      (setq lurk-ping-timer (run-with-timer lurk-ping-period nil #'lurk-ping-function)))))
-
-(defun lurk-connected-p ()
-  (let ((proc (get-process "lurk")))
-    (and proc (eq (process-status proc) 'open))))
-
-(defun lurk-send-msg (msg)
+      (let ((proc (lurk-start-process network)))
+        (lurk-connection-new network proc lurk-default-nick))
+      (lurk-send-msg network (lurk-msg nil nil "USER" lurk-default-nick 0 "*" lurk-default-nick))
+      (lurk-send-msg network (lurk-msg nil nil "NICK" lurk-default-nick))
+      (lurk-add-context (list network))
+      (lurk-highlight-current-context)
+      (lurk-render-prompt))))
+
+(defun lurk-send-msg (network msg)

   (if lurk-debug
       (lurk-display-string nil nil (lurk-msg->string msg)))
   (if lurk-debug
       (lurk-display-string nil nil (lurk-msg->string msg)))

-  (let ((proc (get-process "lurk")))
+  (let ((proc (lurk-connection-process network)))

     (if (and proc (eq (process-status proc) 'open))
         (process-send-string proc (concat (lurk-msg->string msg) "\r\n"))
     (if (and proc (eq (process-status proc) 'open))
         (process-send-string proc (concat (lurk-msg->string msg) "\r\n"))

-      (lurk-display-error "No server connection established.")
-      (error "No server connection established"))))
+      (lurk-display-error "No network connection established"))))

 
 
 
 

-;;; Server messages
+;;; network messages

 ;;
 
 (defun lurk-msg (tags src cmd &rest params)
 ;;
 
 (defun lurk-msg (tags src cmd &rest params)


@@ -221,7 +267,7 @@
    (opt (group (+ not-newline))))
   "Regex used to parse IRC messages.
 Note that this regex is incomplete.  Noteably, we discard the non-nick
    (opt (group (+ not-newline))))
   "Regex used to parse IRC messages.
 Note that this regex is incomplete.  Noteably, we discard the non-nick

-portion of the source component of the message, as LURK doesn't use this.")
+portion of the source component of the message, as lurk doesn't use this.")

 
 (defun lurk-string->msg (string)
   (if (string-match lurk-msg-regex string)
 
 (defun lurk-string->msg (string)
   (if (string-match lurk-msg-regex string)


@@ -231,13 +277,13 @@ portion of the source component of the message, as LURK doesn't use this.")
              (params-str (match-string 4 string))
              (params
               (if params-str
              (params-str (match-string 4 string))
              (params
               (if params-str

-                  (let* ((idx (cl-search ":" params-str))
+                  (let* ((idx (seq-position params-str ?:))

                          (l (split-string (string-trim (substring params-str 0 idx))))
                          (r (if idx (list (substring params-str (+ 1 idx))) nil)))
                     (append l r))
                 nil)))
         (apply #'lurk-msg (append (list tags src cmd) params)))
                          (l (split-string (string-trim (substring params-str 0 idx))))
                          (r (if idx (list (substring params-str (+ 1 idx))) nil)))
                     (append l r))
                 nil)))
         (apply #'lurk-msg (append (list tags src cmd) params)))

-    (error "Failed to parse string " string)))
+    (error "Failed to parse string %s" string)))

 
 (defun lurk-msg->string (msg)
   (let ((tags (lurk-msg-tags msg))
 
 (defun lurk-msg->string (msg)
   (let ((tags (lurk-msg-tags msg))


@@ -259,79 +305,152 @@ portion of the source component of the message, as LURK doesn't use this.")
 ;;; Contexts
 ;;
 
 ;;; Contexts
 ;;
 

-(defvar lurk-current-context nil)
-(defvar lurk-contexts (make-hash-table :test #'equal))
-
-(defun lurk-add-context (name)
-  (puthash name nil lurk-contexts))
-
-(defun lurk-del-context (name)
-  (remhash name lurk-contexts))
-
-(defun lurk-get-context-users (name)
-  (gethash name lurk-contexts))
-
-(defun lurk-add-context-users (context users)
-  (puthash context
-           (append users
-                   (gethash context lurk-contexts))
-           lurk-contexts))
-
-(defun lurk-del-context-user (context user)
-  (puthash context
-           (remove user (gethash context lurk-contexts))
-           lurk-contexts))
-
-(defun lurk-del-user (user)
-  (dolist (context (lurk-get-context-list))
-    (lurk-del-context-user context user)))
-
-(defun lurk-rename-user (old-nick new-nick)
-  (dolist (context (lurk-get-context-list))
-    (lurk-del-context-user context old-nick)
-    (lurk-add-context-users context (list new-nick))))
-
-(defun lurk-get-context-type (name)
-  (cond
-   ((string-prefix-p "#" name) 'channel)
-   ((string-match-p (rx (or "." "localhost")) name) 'host)
-   (t 'nick)))
-
-(defun lurk-get-context-list ()
-  (let ((res nil))
-    (maphash (lambda (key val)
-               (cl-pushnew key res))
-             lurk-contexts)
-    res))
-
-(defun lurk-get-next-context (&optional prev)
-  (if lurk-current-context
-      (let* ((context-list (if prev
-                               (reverse (lurk-get-context-list))
-                             (lurk-get-context-list)))
-             (context-list* (member lurk-current-context context-list)))
-        (if (> (length context-list*) 1)
-            (cadr context-list*)
-          (car context-list)))
+;; A context is a list (network channel) identifying the network
+;; and channel.  The tail of the list contains the nicks of users
+;; present in the channel.
+;;
+;; Each network has a special context (network) used for messages
+;; to/from the network itself.
+
+(defvar lurk-contexts nil
+  "List of currently-available contexts.
+The head of this list is always the current context.")
+
+(defun lurk-current-context ()
+  "Return the current context."
+  (if lurk-contexts
+      (car lurk-contexts)

     nil))
 
     nil))
 

-(defun lurk-set-current-context (context)
-  (setq lurk-current-context context)
-  (lurk-highlight-context context)
-  (if lurk-zoomed
-      (lurk-zoom-in lurk-current-context)))
+(defun lurk-contexts-equal (c1 c2)
+  (if (lurk-network-context-p c1)
+      (and (lurk-network-context-p c2)
+           (equal (lurk-context-network c1)
+                  (lurk-context-network c2)))
+    (and (not (lurk-network-context-p c2))
+         (equal (seq-take c1 2)
+                (seq-take c2 2)))))
+
+(defun lurk-context-network (ctx)
+  (elt ctx 0))
+
+(defun lurk-context-channel (ctx)
+  (elt ctx 1))
+
+(defun lurk-network-context-p (ctx)
+  (not (cdr ctx)))
+
+(defun lurk-add-context (ctx)
+  (add-to-list 'lurk-contexts ctx))
+
+(defun lurk-remove-context (ctx)
+  (setq lurk-contexts
+        (seq-remove
+         (lambda (this-ctx)
+           (lurk-contexts-equal this-ctx ctx))
+         lurk-contexts)))
+
+(defun lurk-remove-network-contexts (network)
+  (setq lurk-contexts
+        (seq-remove (lambda (row) (equal (car row) network))
+                    lurk-contexts)))
+
+(defun lurk-context->string (ctx)
+  (concat
+   (if (lurk-network-context-p ctx)
+       ""
+     (concat (lurk-context-channel ctx) "@"))
+   (lurk-context-network ctx)))
+
+(defun lurk-string->context (string)
+  (if (not (string-prefix-p "#" string))
+      (lurk-get-context string)
+    (let* ((parts (string-split string "@"))
+           (channel (elt parts 0))
+           (network (elt parts 1)))
+      (lurk-get-context network channel))))
+
+(defun lurk-get-context (network &optional channel)
+  (if (and channel (string-prefix-p "#" channel))
+      (let ((test-ctx (list network channel)))
+        (seq-find (lambda (ctx)
+                    (equal (seq-take ctx 2) test-ctx))
+                  lurk-contexts))
+    (car (member (list network) lurk-contexts))))
+
+(defun lurk-cycle-contexts (&optional reverse)
+  (setq lurk-contexts
+        (if reverse
+            (let ((nminus1 (- (length lurk-contexts) 1)))
+              (cons
+               (elt lurk-contexts nminus1)
+               (seq-take lurk-contexts nminus1)))
+          (append (cdr lurk-contexts) (list (car lurk-contexts))))))
+
+(defun lurk-switch-to-context (ctx)
+  (setq lurk-contexts
+        (let* ((new-head (memq ctx lurk-contexts))
+               (new-tail (take (- (length lurk-contexts)
+                                  (length new-head))
+                               lurk-contexts)))
+          (append new-head new-tail))))
+
+
+;;; Context users
+;;

 
 

-(defun lurk-cycle-contexts (&optional rev)
-  (if lurk-current-context
-      (progn
-        (lurk-set-current-context (lurk-get-next-context rev))
-        (lurk-render-prompt))
-    (lurk-display-error "No channels joined.")))
+(defvar lurk-context-users nil
+  "Association list between channel contexts and users.")
+
+(defun lurk-get-context-users (ctx)
+  (cdr (assoc ctx lurk-context-users)))
+
+(defun lurk-set-context-users (ctx users)
+  (setq lurk-context-users
+        (cons (cons ctx users) (assoc-delete-all ctx lurk-context-users))))
+
+(defun lurk-add-context-users (ctx users)
+  (lurk-set-context-users
+   ctx
+   (cl-union users (lurk-get-context-users ctx))))
+
+(defun lurk-del-context-user (ctx user)
+  (lurk-set-context-users
+   ctx
+   (delete user (lurk-get-context-users ctx))))
+
+(defun lurk-del-all-context-users (ctx)
+  (lurk-set-context-users ctx nil))
+
+(defun lurk-del-network-user (network user)
+  (dolist (ctx lurk-contexts)
+    (if (and (equal (lurk-context-network ctx) network)
+             (not (lurk-network-context-p ctx)))
+        (lurk-del-context-user ctx user))))
+
+(defun lurk-del-all-network-users (network)
+  (dolist (ctx lurk-contexts)
+    (if (and (equal (lurk-context-network ctx) network)
+             (not (lurk-network-context-p ctx)))
+        (lurk-del-all-context-users ctx))))
+
+(defun lurk-rename-network-user (network old-nick new-nick)
+  (dolist (ctx lurk-contexts)
+    (when (and (equal (lurk-context-network ctx) network)
+               (member old-nick (lurk-get-context-users ctx)))
+      (lurk-del-context-user ctx old-nick)
+      (lurk-add-context-users ctx (list new-nick)))))

 
 
 ;;; Buffer
 ;;
 
 
 
 ;;; Buffer
 ;;
 

+(defvar lurk-prompt-marker nil
+  "Marker for prompt position in lurk buffer.")
+
+(defvar lurk-input-marker nil
+  "Marker for prompt position in lurk buffer.")
+

 (defun lurk-render-prompt ()
   (with-current-buffer "*lurk*"
     (let ((update-point (= lurk-input-marker (point)))
 (defun lurk-render-prompt ()
   (with-current-buffer "*lurk*"
     (let ((update-point (= lurk-input-marker (point)))


@@ -346,9 +465,10 @@ portion of the source component of the message, as LURK doesn't use this.")
           (delete-region lurk-prompt-marker lurk-input-marker)
           (goto-char lurk-prompt-marker)
           (insert
           (delete-region lurk-prompt-marker lurk-input-marker)
           (goto-char lurk-prompt-marker)
           (insert

-           (propertize (if lurk-current-context
-                           lurk-current-context
-                         "")
+           (propertize (let ((ctx (lurk-current-context)))
+                         (if ctx
+                             (lurk-context->string ctx)
+                           ""))

                        'face 'lurk-context
                        'read-only t)
            (propertize lurk-prompt-string
                        'face 'lurk-context
                        'read-only t)
            (propertize lurk-prompt-string


@@ -364,32 +484,25 @@ portion of the source component of the message, as LURK doesn't use this.")
         (if (car v)
             (set-window-point (cadr v) lurk-input-marker))))))
   
         (if (car v)
             (set-window-point (cadr v) lurk-input-marker))))))
   

-(defvar lurk-prompt-marker nil
-  "Marker for prompt position in LURK buffer.")
-
-(defvar lurk-input-marker nil
-  "Marker for prompt position in LURK buffer.")
-

 (defun lurk-setup-header ()
   (with-current-buffer "*lurk*"
     (setq-local header-line-format
                 '((:eval
 (defun lurk-setup-header ()
   (with-current-buffer "*lurk*"
     (setq-local header-line-format
                 '((:eval

-                   (let ((proc (get-process "lurk")))
-                     (if proc
-                         (concat
-                          "Host: " (car (process-contact proc))
-                          ", Context: "
-                          (if lurk-current-context
+                   (let* ((ctx (lurk-current-context)))
+                     (if ctx
+                         (let ((network (lurk-context-network ctx)))
+                           (concat
+                            "Network: " network ", "
+                            (if (lurk-network-context-p ctx)
+                                "network"

                               (concat
                               (concat

-                               lurk-current-context
+                               "Channel: "
+                               (lurk-context-channel ctx)

                                " ("
                                (number-to-string
                                " ("
                                (number-to-string

-                                (length (lurk-get-context-users lurk-current-context)))
-                               " users)")
-                            "Server"))
-                       "No connection")))
-                  (:eval
-                   (if lurk-zoomed " [ZOOMED]" ""))))))
+                                (length (lurk-get-context-users ctx)))
+                               ")"))))
+                       "No connection")))))))

 
 (defun lurk-setup-buffer ()
   (with-current-buffer (get-buffer-create "*lurk*")
 
 (defun lurk-setup-buffer ()
   (with-current-buffer (get-buffer-create "*lurk*")


@@ -402,10 +515,17 @@ portion of the source component of the message, as LURK doesn't use this.")
         (set-marker lurk-input-marker (point-max))
       (setq lurk-input-marker (point-max-marker)))
     (goto-char (point-max))
         (set-marker lurk-input-marker (point-max))
       (setq lurk-input-marker (point-max-marker)))
     (goto-char (point-max))

+    (lurk-highlight-current-context)

     (lurk-render-prompt)
     (if lurk-display-header
         (lurk-setup-header))))
 
     (lurk-render-prompt)
     (if lurk-display-header
         (lurk-setup-header))))
 

+(defun lurk-clear-buffer ()
+  "Completely erase all non-prompt and non-input text from lurk buffer."
+  (with-current-buffer "*lurk*"
+    (let ((inhibit-read-only t))
+      (delete-region (point-min) lurk-prompt-marker))))
+

 
 ;;; Output formatting and highlighting
 ;;
 
 ;;; Output formatting and highlighting
 ;;


@@ -428,7 +548,7 @@ portion of the source component of the message, as LURK doesn't use this.")
   "List of seen contexts and associated face lists.")
 
 (defun lurk-get-context-facelist (context)
   "List of seen contexts and associated face lists.")
 
 (defun lurk-get-context-facelist (context)

-  (let ((facelist (gethash context lurk-context-facelists)))
+  (let* ((facelist (gethash context lurk-context-facelists)))

     (unless facelist
       (setq facelist (list 'lurk-text))
       (puthash context facelist lurk-context-facelists))
     (unless facelist
       (setq facelist (list 'lurk-text))
       (puthash context facelist lurk-context-facelists))


@@ -444,14 +564,17 @@ portion of the source component of the message, as LURK doesn't use this.")
       (buffer-string))))
 
 (defun lurk-display-string (context prefix &rest strings)
       (buffer-string))))
 
 (defun lurk-display-string (context prefix &rest strings)

-  (with-current-buffer (get-buffer-create "*lurk*")
+  (with-current-buffer "*lurk*"

     (save-excursion
       (goto-char lurk-prompt-marker)
       (let* ((inhibit-read-only t)
              (old-pos (marker-position lurk-prompt-marker))
              (padded-timestamp (concat (format-time-string "%H:%M ")))
              (padded-prefix (if prefix (concat prefix " ") ""))
     (save-excursion
       (goto-char lurk-prompt-marker)
       (let* ((inhibit-read-only t)
              (old-pos (marker-position lurk-prompt-marker))
              (padded-timestamp (concat (format-time-string "%H:%M ")))
              (padded-prefix (if prefix (concat prefix " ") ""))

-             (context-atom (if context (intern context) nil)))
+             (context-atom (if context
+                               (intern (lurk-context->string context))
+                             nil))
+             (context-face (lurk-get-context-facelist context)))

         (insert-before-markers
          (lurk--fill-strings
           80
         (insert-before-markers
          (lurk--fill-strings
           80


@@ -468,36 +591,54 @@ portion of the source component of the message, as LURK doesn't use this.")
                       'invisible context-atom)
           (lurk-add-formatting
            (propertize (concat (apply #'lurk-buttonify-urls strings) "\n")
                       'invisible context-atom)
           (lurk-add-formatting
            (propertize (concat (apply #'lurk-buttonify-urls strings) "\n")

-                       'face (lurk-get-context-facelist context)
+                       'face context-face

                        'read-only t
                        'context context
                        'read-only t
                        'context context

-                       'invisible context-atom))))))))
+                       'invisible context-atom)))))))
+  (lurk-scroll-windows-to-last-line))
+
+(defun lurk-click-context (button)
+  (lurk-switch-to-context (button-get button 'context))
+  (lurk-highlight-current-context)
+  (lurk-render-prompt)
+  (if lurk-zoomed
+      (lurk-zoom-in (lurk-current-context))))
+
+(defun lurk-make-context-button (context &optional string)
+  (with-temp-buffer
+    (let ((label (or string (lurk-context->string context))))
+      (insert-text-button label
+                          'action #'lurk-click-context
+                          'context context
+                          'follow-link t
+                          'help-echo "Switch context"))
+    (buffer-string)))

 
 

-(defun lurk-display-message (from to text)
-  (let ((context (if (eq 'channel (lurk-get-context-type to))
-                     to
-                   (if (equal to lurk-nick) from to))))
+(defun lurk-display-message (network from to text)
+  (let ((context (if (string-prefix-p "#" to)
+                     (lurk-get-context network to)
+                   (lurk-get-context network))))

     (lurk-display-string
      context
      (propertize
     (lurk-display-string
      context
      (propertize

-      (pcase (lurk-get-context-type to)
-        ('channel (concat to " <" from ">"))
-        ('nick (concat "[" from " -> " to "]"))
-        (_
-         (error "Unsupported context type")))
+      (if (lurk-network-context-p context)
+          (concat "[" from "->" to "]")
+        (concat
+         (lurk-make-context-button context)
+         " <" from ">"))

       'face (lurk-get-context-facelist context))
      text)))
 
       'face (lurk-get-context-facelist context))
      text)))
 

-(defun lurk-display-action (from to action-text)
-  (let ((context (if (eq 'channel (lurk-get-context-type to))
-                     to
-                   (if (equal to lurk-nick) from to))))
+(defun lurk-display-action (network from to action-text)
+  (let ((context (if (string-prefix-p "#" to)
+                     (lurk-get-context network to)
+                   (lurk-get-context network))))

     (lurk-display-string
      context
      (propertize
     (lurk-display-string
      context
      (propertize

-      (concat context " * " from)
+      (concat (lurk-context->string context) " *")

       'face (lurk-get-context-facelist context))
       'face (lurk-get-context-facelist context))

-     action-text)))
+     from " " action-text)))

 
 (defun lurk-display-notice (context &rest notices)
   (lurk-display-string
 
 (defun lurk-display-notice (context &rest notices)
   (lurk-display-string


@@ -511,13 +652,14 @@ portion of the source component of the message, as LURK doesn't use this.")
    (propertize lurk-error-prefix 'face 'lurk-error)
    (apply #'concat messages)))
 
    (propertize lurk-error-prefix 'face 'lurk-error)
    (apply #'concat messages)))
 

-(defun lurk-highlight-context (context)
-  (maphash
-   (lambda (this-context facelist)
-     (if (equal this-context context)
-         (setcar facelist 'lurk-text)
-       (setcar facelist 'lurk-faded)))
-   lurk-context-facelists)
+(defun lurk-highlight-current-context ()
+  (with-current-buffer "*lurk*"
+    (maphash
+     (lambda (this-context facelist)
+       (if (equal this-context (lurk-current-context))
+           (setcar facelist 'lurk-text)
+         (setcar facelist 'lurk-faded)))
+     lurk-context-facelists))

   (force-window-update "*lurk*"))
 
 (defun lurk-zoom-in (context)
   (force-window-update "*lurk*"))
 
 (defun lurk-zoom-in (context)


@@ -525,21 +667,40 @@ portion of the source component of the message, as LURK doesn't use this.")
     (maphash
      (lambda (this-context _)
        (when this-context
     (maphash
      (lambda (this-context _)
        (when this-context

-         (let ((this-context-atom (intern this-context)))
+         (let ((this-context-atom
+                (intern (lurk-context->string this-context))))

            (if (equal this-context context)
                (remove-from-invisibility-spec this-context-atom)
              (add-to-invisibility-spec this-context-atom)))))
      lurk-context-facelists)
            (if (equal this-context context)
                (remove-from-invisibility-spec this-context-atom)
              (add-to-invisibility-spec this-context-atom)))))
      lurk-context-facelists)

-    (force-window-update "*lurk*")))
+    (force-window-update "*lurk*"))
+  (lurk-scroll-windows-to-last-line))

 
 (defun lurk-zoom-out ()
   (with-current-buffer "*lurk*"
     (maphash
      (lambda (this-context _)
 
 (defun lurk-zoom-out ()
   (with-current-buffer "*lurk*"
     (maphash
      (lambda (this-context _)

-       (let ((this-context-atom (if this-context (intern this-context) nil)))
+       (let ((this-context-atom
+              (if this-context
+                  (intern (lurk-context->string this-context))
+                nil)))

          (remove-from-invisibility-spec this-context-atom)))
      lurk-context-facelists)
          (remove-from-invisibility-spec this-context-atom)))
      lurk-context-facelists)

-    (force-window-update "*lurk*")))
+    (force-window-update "*lurk*"))
+  (lurk-scroll-windows-to-last-line))
+
+(defun lurk--start-of-final-line ()
+  (with-current-buffer "*lurk*"
+    (save-excursion
+      (goto-char (point-max))
+      (line-beginning-position))))
+
+(defun lurk-scroll-windows-to-last-line ()
+  (with-current-buffer "*lurk*"
+    (dolist (window (get-buffer-window-list))
+      (if (>= (window-point window) (lurk--start-of-final-line))
+          (with-selected-window window
+            (recenter -1))))))

 
 (defconst lurk-url-regex
   (rx (:
 
 (defconst lurk-url-regex
   (rx (:


@@ -583,7 +744,8 @@ portion of the source component of the message, as LURK doesn't use this.")
           (strikethrough nil)
           (prev-point (point)))
       (while (re-search-forward (rx (or (any "\x02\x1D\x1F\x1E\x0F")
           (strikethrough nil)
           (prev-point (point)))
       (while (re-search-forward (rx (or (any "\x02\x1D\x1F\x1E\x0F")

-                                        (: "\x03" (+ digit) (opt "," (* digit))))) nil t)
+                                        (: "\x03" (* digit) (opt "," (* digit)))))
+                                nil t)

         (let ((beg (+ (match-beginning 0) 1)))
           (if bold
               (add-face-text-property prev-point beg '(:weight bold)))
         (let ((beg (+ (match-beginning 0) 1)))
           (if bold
               (add-face-text-property prev-point beg '(:weight bold)))


@@ -612,120 +774,143 @@ portion of the source component of the message, as LURK doesn't use this.")
 ;;; Message evaluation
 ;;
 
 ;;; Message evaluation
 ;;
 

-(defun lurk-eval-msg-string (string)
+(defun lurk-eval-msg-string (network string)

   (if lurk-debug
       (lurk-display-string nil nil string))
   (let* ((msg (lurk-string->msg string)))
   (if lurk-debug
       (lurk-display-string nil nil string))
   (let* ((msg (lurk-string->msg string)))

-    (lurk-process-autoreplies msg)
+    (lurk-process-autoreplies network msg)

     (pcase (lurk-msg-cmd msg)
       ("PING"
     (pcase (lurk-msg-cmd msg)
       ("PING"

-       (lurk-send-msg
+       (lurk-send-msg network

         (lurk-msg nil nil "PONG" (lurk-msg-params msg))))
 
       ("PONG")
 
         (lurk-msg nil nil "PONG" (lurk-msg-params msg))))
 
       ("PONG")
 

-      ("001"
+      ("001" ; RPL_WELCOME

        (let* ((params (lurk-msg-params msg))
               (nick (elt params 0))
               (text (string-join (seq-drop params 1) " ")))
        (let* ((params (lurk-msg-params msg))
               (nick (elt params 0))
               (text (string-join (seq-drop params 1) " ")))

-         (setq lurk-nick nick)
-         (lurk-display-notice nil text)))
+         (lurk-set-connection-nick network nick)
+         (lurk-display-notice (lurk-get-context network) text))
+       (let* ((row (assoc network lurk-networks))
+              (channels (if (memq :channels row)
+                            (cdr (memq :channels row))
+                          nil)))
+         (dolist (channel channels)
+           (lurk-command-join (list channel)))))

 
       ("353" ; NAMEREPLY
        (let* ((params (lurk-msg-params msg))
               (channel (elt params 2))
 
       ("353" ; NAMEREPLY
        (let* ((params (lurk-msg-params msg))
               (channel (elt params 2))

-              (names (split-string (elt params 3))))
-         (lurk-add-context-users channel names)))
+              (names (split-string (elt params 3)))
+              (ctx (lurk-get-context network channel)))
+         (if ctx
+             (lurk-add-context-users ctx names)
+           (lurk-display-notice ctx "Users in " channel
+                                ": " (string-join names " ")))))

 
       ("366" ; ENDOFNAMES
        (let* ((params (lurk-msg-params msg))
 
       ("366" ; ENDOFNAMES
        (let* ((params (lurk-msg-params msg))

-              (channel (elt params 1)))
-         (lurk-display-notice
-          channel
-          (lurk--as-string (length (lurk-get-context-users channel)))
-          " users in " channel)))
-
-      ("331"
+              (channel (elt params 1))
+              (ctx (lurk-get-context network channel)))
+         (if ctx
+             (lurk-display-notice
+              ctx
+              (lurk--as-string (length (lurk-get-context-users ctx)))
+              " users in " channel)
+           (lurk-display-notice (lurk-get-context network)
+                                "End of " channel " names list."))))
+
+      ("331" ; RPL_NOTOPIC

        (let* ((params (lurk-msg-params msg))
        (let* ((params (lurk-msg-params msg))

-              (channel (elt params 1)))
-         (lurk-display-notice
-          channel
-          "No topic set.")))
+              (channel (elt params 1))
+              (ctx (lurk-get-context network channel)))
+         (lurk-display-notice ctx "No topic set.")))

 
 

-      ("332"
+      ("332" ; RPL_TOPIC

        (let* ((params (lurk-msg-params msg))
               (channel (elt params 1))
        (let* ((params (lurk-msg-params msg))
               (channel (elt params 1))

-              (topic (elt params 2)))
-         (lurk-display-notice channel "Topic: " topic)))
-
-      ("333") ; Avoid displaying these
+              (topic (elt params 2))
+              (ctx (lurk-get-context network channel)))
+         (lurk-display-notice ctx "Topic: " topic)))

 
       ((rx (= 3 (any digit)))
 
       ((rx (= 3 (any digit)))

-       (lurk-display-notice nil (mapconcat 'identity (cdr (lurk-msg-params msg)) " ")))
+       (lurk-display-notice (lurk-get-context network)
+                            (mapconcat 'identity (cdr (lurk-msg-params msg)) " ")))

 
       ((and "JOIN"
 
       ((and "JOIN"

-            (guard (equal lurk-nick (lurk-msg-src msg))))
-       (let ((channel (car (lurk-msg-params msg))))
-         (lurk-add-context channel)
-         (lurk-set-current-context channel)
-         (lurk-display-notice channel "Joining channel " channel)
+            (guard (equal (lurk-connection-nick network)
+                          (lurk-msg-src msg))))
+       (let* ((channel (car (lurk-msg-params msg)))
+              (context (list network channel)))
+         (lurk-add-context context)
+         (lurk-del-all-context-users context)
+         (lurk-display-notice (lurk-current-context)
+                              "Joining channel " channel " on " network)
+         (lurk-highlight-current-context)

          (lurk-render-prompt)))
 
       ("JOIN"
          (lurk-render-prompt)))
 
       ("JOIN"

-       (let ((channel (car (lurk-msg-params msg)))
-             (nick (lurk-msg-src msg)))
-         (lurk-add-context-users channel (list nick))
+       (let* ((channel (car (lurk-msg-params msg)))
+              (nick (lurk-msg-src msg))
+              (ctx (lurk-get-context network channel)))
+         (lurk-add-context-users ctx (list nick))

          (if lurk-show-joins
          (if lurk-show-joins

-             (lurk-display-notice channel nick " joined channel " channel))))
+             (lurk-display-notice ctx nick " joined channel " channel
+                                  " on " network))))

 
       ((and "PART"
 
       ((and "PART"

-            (guard (equal lurk-nick (lurk-msg-src msg))))
-       (let ((channel (car (lurk-msg-params msg))))
-         (lurk-display-notice channel "Left channel " channel)
-         (lurk-del-context channel)
-         (if (equal channel lurk-current-context)
-             (lurk-set-current-context (lurk-get-next-context)))
+            (guard (equal (lurk-connection-nick network)
+                          (lurk-msg-src msg))))
+       (let* ((channel (car (lurk-msg-params msg)))
+              (context (list network channel)))
+         (lurk-display-notice context "Left channel " channel)
+         (lurk-remove-context context)
+         (lurk-del-all-context-users context)
+         (lurk-highlight-current-context)

          (lurk-render-prompt)))
 
       ("PART"
          (lurk-render-prompt)))
 
       ("PART"

-       (let ((channel (car (lurk-msg-params msg)))
-             (nick (lurk-msg-src msg)))
-         (lurk-del-context-user channel nick)
-         (if lurk-show-joins
-             (lurk-display-notice channel nick " left channel " channel))))
-
-      ((and "KICK")
-       (let ((kicker-nick (lurk-msg-src msg))
-             (channel (car (lurk-msg-params msg)))
-             (nick (cadr (lurk-msg-params msg)))
-             (reason (caddr (lurk-msg-params msg))))
-         (if (equal nick lurk-nick)
-             (progn
-               (lurk-display-notice channel kicker-nick " kicked you from " channel ": " reason)
-               (lurk-del-context channel)
-               (if (equal channel lurk-current-context)
-                   (lurk-set-current-context (lurk-get-next-context)))
-               (lurk-render-prompt))
-           (lurk-del-context-user channel nick)
-           (lurk-display-notice channel kicker-nick " kicked " nick " from " channel ": " reason))))
-
-      ("QUIT"
-       (let ((nick (lurk-msg-src msg))
-             (reason (mapconcat 'identity (lurk-msg-params msg) " ")))
-         (lurk-del-user nick)
+       (let* ((channel (car (lurk-msg-params msg)))
+              (nick (lurk-msg-src msg))
+              (ctx (lurk-get-context network channel)))
+         (lurk-del-context-user ctx nick)

          (if lurk-show-joins
          (if lurk-show-joins

-             (lurk-display-notice nil nick " quit: " reason))))
+             (lurk-display-notice ctx nick " left channel " channel
+                                  " on " network))))

 
       ((and "NICK"
 
       ((and "NICK"

-            (guard (equal lurk-nick (lurk-msg-src msg))))
-       (setq lurk-nick (car (lurk-msg-params msg)))
-       (lurk-display-notice nil "Set nick to " lurk-nick))
+            (guard (equal (lurk-connection-nick network)
+                          (lurk-msg-src msg))))
+       (let ((new-nick (car (lurk-msg-params msg)))
+             (old-nick (lurk-connection-nick network)))
+         (lurk-set-connection-nick network new-nick)
+         (lurk-rename-network-user network old-nick new-nick)
+         (lurk-display-notice (lurk-get-context network)
+                              "Nick set to " new-nick " on " network)))

 
       ("NICK"
        (let ((old-nick (lurk-msg-src msg))
              (new-nick (car (lurk-msg-params msg))))
 
       ("NICK"
        (let ((old-nick (lurk-msg-src msg))
              (new-nick (car (lurk-msg-params msg))))

-         (lurk-display-notice nil old-nick " is now known as " new-nick)
-         (lurk-rename-user old-nick new-nick)))
+         (lurk-display-notice (lurk-get-context network)
+                              old-nick " is now known as " new-nick
+                              " on " network)
+         (lurk-rename-network-user network old-nick new-nick)))
+
+      ("TOPIC"
+       (let ((channel (car (lurk-msg-params msg)))
+             (nick (lurk-msg-src msg))
+             (topic (cadr (lurk-msg-params msg))))
+         (lurk-display-notice (lurk-get-context network channel)
+                              nick " set the topic: " topic)))
+
+      ("QUIT"
+       (let ((nick (lurk-msg-src msg))
+             (reason (mapconcat 'identity (lurk-msg-params msg) " ")))
+         (lurk-del-network-user network nick)
+         (if lurk-show-joins
+             (lurk-display-notice (lurk-get-context network)
+                                  nick " on " network " has quit: " reason))))

 
       ("NOTICE"
        (let ((nick (lurk-msg-src msg))
 
       ("NOTICE"
        (let ((nick (lurk-msg-src msg))


@@ -735,9 +920,10 @@ portion of the source component of the message, as LURK doesn't use this.")
            ((rx (: "\01VERSION "
                    (let version (* (not "\01")))
                    "\01"))
            ((rx (: "\01VERSION "
                    (let version (* (not "\01")))
                    "\01"))

-            (lurk-display-notice nil "CTCP version reply from " nick ": " version))
+            (lurk-display-notice (lurk-get-context network)
+                                 "CTCP version reply from " nick ": " version))

            (_
            (_

-            (lurk-display-notice nil text)))))
+            (lurk-display-notice (lurk-get-context network channel) text)))))

 
       ("PRIVMSG"
        (let* ((from (lurk-msg-src msg))
 
       ("PRIVMSG"
        (let* ((from (lurk-msg-src msg))


@@ -747,47 +933,43 @@ portion of the source component of the message, as LURK doesn't use this.")
          (pcase text
            ("\01VERSION\01"
             (let ((version-string (concat lurk-version " - running on GNU Emacs " emacs-version)))
          (pcase text
            ("\01VERSION\01"
             (let ((version-string (concat lurk-version " - running on GNU Emacs " emacs-version)))

-              (lurk-send-msg (lurk-msg nil nil "NOTICE"
+              (lurk-send-msg network
+                             (lurk-msg nil nil "NOTICE"

                                        (list from (concat "\01VERSION "
                                                           version-string
                                                           "\01")))))
                                        (list from (concat "\01VERSION "
                                                           version-string
                                                           "\01")))))

-            (lurk-display-notice nil "CTCP version request received from " from))
+            (lurk-display-notice (lurk-get-context network)
+                                 "CTCP version request received from "
+                                 from " on " network))

 
            ((rx (let ping (: "\01PING " (* (not "\01")) "\01")))
 
            ((rx (let ping (: "\01PING " (* (not "\01")) "\01")))

-            (lurk-send-msg (lurk-msg nil nil "NOTICE" (list from ping)))
-            (lurk-display-notice from "CTCP ping received from " from))
+            (lurk-send-msg network (lurk-msg nil nil "NOTICE" (list from ping)))
+            (lurk-display-notice (lurk-get-context network)
+                                 "CTCP ping received from " from " on " network))

 
            ("\01USERINFO\01"
 
            ("\01USERINFO\01"

-            (lurk-display-notice from "CTCP userinfo request from " from " (no response sent)"))
+            (lurk-display-notice (lurk-get-context network)
+                                 "CTCP userinfo request from " from
+                                 " on " network " (no response sent)"))
+
+           ("\01CLIENTINFO\01"
+            (lurk-display-notice (lurk-get-context network)
+                                 "CTCP clientinfo request from " from
+                                 " on " network " (no response sent)"))

 
            ((rx (: "\01ACTION " (let action-text (* (not "\01"))) "\01"))
 
            ((rx (: "\01ACTION " (let action-text (* (not "\01"))) "\01"))

-            (lurk-display-action from to action-text))
+            (lurk-display-action network from to action-text))

 
            (_
 
            (_

-            (lurk-display-message from to text)))))
+            (lurk-display-message network from to text)))))
+

       (_
       (_

-       (lurk-display-notice nil (lurk-msg->string msg))))))
+       (lurk-display-notice (lurk-get-context network)
+                            (lurk-msg->string msg))))))

 
 
 ;;; User-defined responses
 
 
 ;;; User-defined responses

-
-
-(defvar lurk-autoreply-table nil
-  "Table of autoreply messages.
-
-Each autoreply is a list of two elements: (matcher reply)
-
-Here matcher is a list:
-
-(network src cmd params ...)
-
-and reply is another list:
-
- (cmd params ...)
-
-Each entry in the matcher list is a regular expression tested against the
-corresponding values in the incomming message.  Entries can be nil,
-in which case they match anything.")
+;;

 
 (defun lurk--lists-equal (l1 l2)
     (if (and l1 l2)
 
 (defun lurk--lists-equal (l1 l2)
     (if (and l1 l2)


@@ -797,25 +979,23 @@ in which case they match anything.")
           nil)
       t))
 
           nil)
       t))
 

-(defun lurk-process-autoreply (msg autoreply)
+(defun lurk-process-autoreply (network msg autoreply)

   (let ((matcher (car autoreply))
         (reply (cadr autoreply)))
   (let ((matcher (car autoreply))
         (reply (cadr autoreply)))

-    (let ((network (car matcher)))
-      (when (and (or (not network)
-                     (and (get-process "lurk")
-                          (equal (car (process-contact (get-process "lurk")))
-                                 (cadr (assoc network lurk-networks)))))
+    (let ((target-network (car matcher)))
+      (when (and (or (not target-network)
+                     (and (equal network target-network)))

                  (lurk--lists-equal (cdr matcher)
                                     (append (list (lurk-msg-src msg)
                                                   (lurk-msg-cmd msg))
                                             (lurk-msg-params msg))))
                  (lurk--lists-equal (cdr matcher)
                                     (append (list (lurk-msg-src msg)
                                                   (lurk-msg-cmd msg))
                                             (lurk-msg-params msg))))

-        (lurk-send-msg
+        (lurk-send-msg network

          (lurk-msg nil nil (car reply) (cdr reply)))))))
 
          (lurk-msg nil nil (car reply) (cdr reply)))))))
 

-(defun lurk-process-autoreplies (msg)
+(defun lurk-process-autoreplies (network msg)

   (mapc
    (lambda (autoreply)
   (mapc
    (lambda (autoreply)

-     (lurk-process-autoreply msg autoreply))
+     (lurk-process-autoreply network msg autoreply))

    lurk-autoreply-table))
 
 
    lurk-autoreply-table))
 
 


@@ -825,17 +1005,23 @@ in which case they match anything.")
 (defvar lurk-command-table
   '(("DEBUG" "Toggle debug mode on/off." lurk-command-debug lurk-boolean-completions)
     ("HEADER" "Toggle display of header." lurk-command-header lurk-boolean-completions)
 (defvar lurk-command-table
   '(("DEBUG" "Toggle debug mode on/off." lurk-command-debug lurk-boolean-completions)
     ("HEADER" "Toggle display of header." lurk-command-header lurk-boolean-completions)

+    ("SHOWJOINS" "Toggles display of joins/parts." lurk-command-showjoins lurk-boolean-completions)
+    ("NETWORKS" "List known IRC networks." lurk-command-networks)

     ("CONNECT" "Connect to an IRC network." lurk-command-connect lurk-network-completions)
     ("CONNECT" "Connect to an IRC network." lurk-command-connect lurk-network-completions)

-    ("TOPIC" "Set topic for current channel." lurk-command-topic)
-    ("ME" "Display action." lurk-command-me)
-    ("VERSION" "Request version of another user's client via CTCP." lurk-command-version)
-    ("PART" "Leave channel." lurk-command-part lurk-context-completions)

     ("QUIT" "Disconnect from current network." lurk-command-quit)
     ("QUIT" "Disconnect from current network." lurk-command-quit)

+    ("JOIN" "Join one or more channels." lurk-command-join)
+    ("PART" "Leave channel." lurk-command-part lurk-channel-completions)
+    ("SWITCHCONTEXT" "Switch current context" lurk-command-switch-context lurk-context-completions)

     ("NICK" "Change nick." lurk-command-nick)
     ("LIST" "Display details of one or more channels." lurk-command-list)
     ("NICK" "Change nick." lurk-command-nick)
     ("LIST" "Display details of one or more channels." lurk-command-list)

+    ("TOPIC" "Set/query topic for current channel." lurk-command-topic)
+    ("USERS" "List nicks of users in current channel." lurk-command-users)

     ("MSG" "Send private message to user." lurk-command-msg lurk-nick-completions)
     ("MSG" "Send private message to user." lurk-command-msg lurk-nick-completions)

+    ("ME" "Display action." lurk-command-me)
+    ("VERSION" "Request version of another user's client via CTCP." lurk-command-version lurk-nick-completions)
+    ("CLEAR" "Clear buffer text." lurk-command-clear lurk-context-completions)

     ("HELP" "Display help on client commands." lurk-command-help lurk-help-completions))
     ("HELP" "Display help on client commands." lurk-command-help lurk-help-completions))

-  "Table of commands explicitly supported by Lurk.")
+  "Table of commands explicitly supported by lurk.")

 
 (defun lurk-boolean-completions ()
   '("on" "off"))
 
 (defun lurk-boolean-completions ()
   '("on" "off"))


@@ -843,15 +1029,19 @@ in which case they match anything.")
 (defun lurk-network-completions ()
   (mapcar (lambda (row) (car row)) lurk-networks))
 
 (defun lurk-network-completions ()
   (mapcar (lambda (row) (car row)) lurk-networks))
 

-(defun lurk-nick-completions ()
-  (lurk-get-context-users lurk-current-context))
-
-(defun lurk-context-completions ()
-  (lurk-get-context-list))
-

 (defun lurk-help-completions ()
   (mapcar (lambda (row) (car row)) lurk-command-table))
 
 (defun lurk-help-completions ()
   (mapcar (lambda (row) (car row)) lurk-command-table))
 

+(defun lurk-channel-completions ()
+  (mapcar (lambda (ctx)
+            (lurk-context->string ctx))
+          (seq-filter (lambda (ctx)
+                        (not (lurk-network-context-p ctx)))
+                      lurk-contexts)))
+
+(defun lurk-context-completions ()
+  (mapcar (lambda (ctx) (lurk-context->string ctx)) lurk-contexts))
+

 (defun lurk-command-help (params)
   (if params
       (let* ((cmd-str (upcase (car params)))
 (defun lurk-command-help (params)
   (if params
       (let* ((cmd-str (upcase (car params)))


@@ -886,6 +1076,16 @@ in which case they match anything.")
     (setq-local header-line-format nil)
     (lurk-display-notice nil "Header disabled.")))
 
     (setq-local header-line-format nil)
     (lurk-display-notice nil "Header disabled.")))
 

+(defun lurk-command-showjoins (params)
+  (setq lurk-show-joins 
+        (if params
+            (if (equal (upcase (car params)) "ON")
+                t
+              nil)
+          (not lurk-show-joins)))
+  (lurk-display-notice nil "Joins/parts will now be "
+                       (if lurk-show-joins "shown" "hidden") "."))
+

 (defun lurk-command-connect (params)
   (if params
       (let ((network (car params)))
 (defun lurk-command-connect (params)
   (if params
       (let ((network (car params)))


@@ -893,69 +1093,139 @@ in which case they match anything.")
         (lurk-connect network))
     (lurk-display-notice nil "Usage: /connect <network>")))
 
         (lurk-connect network))
     (lurk-display-notice nil "Usage: /connect <network>")))
 

-(defun lurk-command-quit (params)
-  (let ((quit-msg (if params (string-join params " ") nil)))
-    (lurk-send-msg (lurk-msg nil nil "QUIT" quit-msg))))
+(defun lurk-command-networks (_params)
+  (lurk-display-notice nil "Currently-known networks:")
+  (dolist (row lurk-networks)
+    (seq-let (network network port &rest _others) row
+      (lurk-display-notice nil "\t" network
+                           " [" network
+                           " " (number-to-string port) "]")))
+  (lurk-display-notice nil "(Modify the `lurk-networks' variable to add more.)"))

 
 

-(defun lurk-command-part (params)
-  (let ((channel (if params (car params) lurk-current-context)))
-    (if channel
-        (lurk-send-msg (lurk-msg nil nil "PART" channel))
-      (lurk-display-error "No current channel to leave."))))
+(defun lurk-command-quit (params)
+  (let ((ctx (lurk-current-context)))
+    (if (not ctx)
+        (lurk-display-error "No current network")
+      (let ((quit-msg (if params (string-join params " ") lurk-default-quit-msg)))
+        (lurk-send-msg
+         (lurk-context-network ctx)
+         (lurk-msg nil nil "QUIT" quit-msg))))))

 
 

-(defun lurk-command-version (params)
+(defun lurk-command-join (params)

   (if params
   (if params

-      (let ((nick (car params)))
-        (lurk-send-msg (lurk-msg nil nil "PRIVMSG"
-                                 (list nick "\01VERSION\01")))
-        (lurk-display-notice nil "CTCP version request sent to " nick))
-    (lurk-display-notice nil "Usage: /version <nick>")))
+      (let ((network (lurk-context-network (lurk-current-context))))
+        (dolist (channel params)
+          (lurk-send-msg network (lurk-msg nil nil "JOIN" channel))))
+    (lurk-display-notice nil "Usage: /join channel [channel2 ...]")))

 
 

-(defun lurk-command-quit (params)
-  (let ((quit-msg (if params (string-join parms " ") lurk-default-quit-msg)))
-    (lurk-send-msg (lurk-msg nil nil "QUIT" quit-msg))))
+(defun lurk-command-part (params)
+  (let ((ctx (cond
+              ((not params) (lurk-current-context))
+              ((seq-contains (car params) "@") (lurk-string->context (car params)))
+              (t (list (lurk-context-network (lurk-current-context))  (car params))))))
+    (let ((network (lurk-context-network ctx))
+          (channel (lurk-context-channel ctx)))
+      (if channel
+          (lurk-send-msg network (lurk-msg nil nil "PART" channel))
+        (lurk-display-error "Specify which channel to leave")))))
+
+(defun lurk-command-switch-context (params)
+  (if (not params)
+      (lurk-display-notice nil "Usage: /switchcontext #channel@network")
+    (let ((ctx (lurk-string->context (car params))))
+      (lurk-switch-to-context ctx)
+      (lurk-highlight-current-context)
+      (lurk-render-prompt)
+      (if lurk-zoomed
+          (lurk-zoom-in (lurk-current-context))))))

 
 (defun lurk-command-nick (params)
 
 (defun lurk-command-nick (params)

-  (let ((new-nick (if params (string-join params " ") nil)))
-    (if new-nick
-        (if (lurk-connected-p)
-            (lurk-send-msg (lurk-msg nil nil "NICK" new-nick))
-          (setq lurk-nick nick)
-          (lurk-display-notice nil "Set default nick to '" nick "'."))
-      (lurk-display-notice nil "Current nick: " lurk-nick))))
-
-(defun lurk-command-me (params)
-  (if lurk-current-context
-      (if params
-          (let* ((action (string-join params " "))
-                 (ctcp-text (concat "\01ACTION " action "\01")))
-            (lurk-send-msg (lurk-msg nil nil "PRIVMSG"
-                                     (list lurk-current-context ctcp-text)))
-            (lurk-display-action lurk-nick lurk-current-context action))
-        (lurk-display-notice nil "Usage: /me <action>"))
-    (lurk-display-notice nil "No current channel.")))
+  (if params
+      (let ((new-nick (string-join params " "))
+            (ctx (lurk-current-context)))
+        (if ctx
+            (lurk-send-msg (lurk-context-network ctx)
+                           (lurk-msg nil nil "NICK" new-nick))
+          (lurk-display-error "No current connection")))
+    (lurk-display-notice nil "Usage: /nick <new-nick>")))

 
 (defun lurk-command-list (params)
 
 (defun lurk-command-list (params)

-  (if (not params)
-      (lurk-display-notice nil "This command can generate lots of output. Use `/LIST -yes' if you really want this, or `/LIST <channel_regexp>' to reduce the output.")
-    (if (equal (upcase (car params)) "-YES")
-        (lurk-send-msg (lurk-msg nil nil "LIST"))
-      (lurk-send-msg (lurk-msg nil nil "LIST" (car params))))))
+  (let ((ctx (lurk-current-context)))
+    (if ctx
+        (if (not params)
+            (lurk-display-notice nil "This command can generate lots of output."
+                                 " Use `/LIST -yes' if you really want this,"
+                                 " or `/LIST <channel_regexp>' to reduce the output.")
+          (let ((network (lurk-context-network ctx)))
+            (if (equal (upcase (car params)) "-YES")
+                (lurk-send-msg network (lurk-msg nil nil "LIST"))
+              (lurk-send-msg network (lurk-msg nil nil "LIST"
+                                              (car params))))))
+      (lurk-display-error "No current connection"))))

 
 (defun lurk-command-topic (params)
 
 (defun lurk-command-topic (params)

-  (if lurk-current-context
-      (if params
-          (lurk-send-msg (lurk-msg nil nil "TOPIC" lurk-current-context (string-join params " ")))
-        (lurk-display-notice nil "Usage: /topic <new topic>"))
-    (lurk-display-notice nil "No current channel.")))
+  (let ((ctx (lurk-current-context)))
+    (if (and ctx (not (lurk-network-context-p ctx)))
+        (let ((network (lurk-context-network ctx))
+              (channel (lurk-context-channel ctx)))
+          (if params
+              (lurk-send-msg network
+                             (lurk-msg nil nil "TOPIC" channel
+                                       (string-join params " ")))
+            (lurk-send-msg network
+                           (lurk-msg nil nil "TOPIC" channel))))
+      (lurk-display-notice nil "No current channel."))))

 
 (defun lurk-command-msg (params)
 
 (defun lurk-command-msg (params)

-  (if (and params (>= (length params) 2))
-      (let ((to (car params))
-            (text (string-join (cdr params) " ")))
-        (lurk-send-msg (lurk-msg nil nil "PRIVMSG" to text))
-        (lurk-display-message lurk-nick to text))
-    (lurk-display-notice nil "Usage: /msg <nick> <message>")))
+  (let ((network (lurk-context-network (lurk-current-context))))
+    (if (and params (>= (length params) 2))
+        (let ((to (car params))
+              (text (string-join (cdr params) " ")))
+          (lurk-send-msg network (lurk-msg nil nil "PRIVMSG" to text))
+          (lurk-display-message network
+                                (lurk-connection-nick network)
+                                to text))
+      (lurk-display-notice nil "Usage: /msg <nick> <message>"))))
+
+(defun lurk-command-me (params)
+  (let* ((ctx (lurk-current-context))
+         (network (lurk-context-network ctx)))
+    (if (and ctx (not (lurk-network-context-p ctx)))
+        (if params
+            (let* ((channel (lurk-context-channel ctx))
+                   (my-nick (lurk-connection-nick network))
+                   (action (string-join params " "))
+                   (ctcp-text (concat "\01ACTION " action "\01")))
+              (lurk-send-msg network
+                             (lurk-msg nil nil "PRIVMSG"
+                                       (list channel ctcp-text)))
+              (lurk-display-action network my-nick channel action))
+          (lurk-display-notice nil "Usage: /me <action>"))
+      (lurk-display-notice nil "No current channel."))))
+
+(defun lurk-command-version (params)
+  (let ((ctx (lurk-current-context)))
+    (if ctx
+        (if params
+            (let ((network (lurk-context-network ctx))
+                  (nick (car params)))
+              (lurk-send-msg network
+                             (lurk-msg nil nil "PRIVMSG"
+                                       (list nick "\01VERSION\01")))
+              (lurk-display-notice ctx "CTCP version request sent to "
+                                   nick " on " network))
+          (lurk-display-notice ctx "Usage: /version <nick>"))
+      (lurk-display-notice nil "No current channel."))))
+
+(defun lurk-command-users (_params)
+  (let ((ctx (lurk-current-context)))
+    (if (and ctx (not (lurk-network-context-p ctx)))
+        (let ((channel (lurk-context-channel ctx))
+              (network (lurk-context-network ctx))
+              (users (lurk-get-context-users ctx)))
+          (lurk-display-notice ctx "Users in " channel " on " network ":")
+          (lurk-display-notice ctx (string-join users " ")))
+      (lurk-display-notice nil "No current channel."))))

 
 
 ;;; Command entering
 
 
 ;;; Command entering


@@ -972,19 +1242,26 @@ in which case they match anything.")
                (params (if params-str
                            (split-string params-str nil t)
                          nil)))
                (params (if params-str
                            (split-string params-str nil t)
                          nil)))

-           (if command-row
+           (if (and command-row (elt command-row 2))

                (funcall (elt command-row 2) params)
                (funcall (elt command-row 2) params)

-             (lurk-send-msg (lurk-msg nil nil (upcase cmd-str) params)))))
+             (lurk-send-msg
+              (lurk-context-network (lurk-current-context))
+              (lurk-msg nil nil (upcase cmd-str) params)))))

         (_
         (_

-         (lurk-display-error "Badly formed command.")))
+         (lurk-display-error "Badly formed command")))

     (unless (string-empty-p string)
     (unless (string-empty-p string)

-      (if lurk-current-context
-          (progn
-            (lurk-send-msg (lurk-msg nil nil "PRIVMSG"
-                                     lurk-current-context
-                                     string))
-            (lurk-display-message lurk-nick lurk-current-context string))
-        (lurk-display-error "No current context.")))))
+      (let ((ctx (lurk-current-context)))
+        (if ctx
+            (if (not (lurk-network-context-p ctx))
+                (let ((network (lurk-context-network ctx))
+                      (channel (lurk-context-channel ctx)))
+                  (lurk-send-msg network
+                                 (lurk-msg nil nil "PRIVMSG" channel string))
+                  (lurk-display-message network
+                                        (lurk-connection-nick network)
+                                        channel string))
+              (lurk-display-error "No current channel"))
+          (lurk-display-error "No current context"))))))

 
 
 ;;; Command history
 
 
 ;;; Command history


@@ -1008,16 +1285,43 @@ in which case they match anything.")
       (insert (elt lurk-history lurk-history-index)))))
 
 
       (insert (elt lurk-history lurk-history-index)))))
 
 

-;;; Interactive functions
+;;; Interactive commands

 ;;
 
 ;;
 

+(defun lurk-enter ()
+  "Enter current contents of line after prompt."
+  (interactive)
+  (with-current-buffer "*lurk*"
+    (let ((line (buffer-substring lurk-input-marker (point-max))))
+      (push line lurk-history)
+      (setq lurk-history-index nil)
+      (let ((inhibit-read-only t))
+        (delete-region lurk-input-marker (point-max)))
+      (lurk-enter-string line))))
+
+(defun lurk-history-next ()
+  (interactive)
+  (lurk-history-cycle -1))
+
+(defun lurk-history-prev ()
+  (interactive)
+  (lurk-history-cycle +1))
+

 (defun lurk-cycle-contexts-forward ()
   (interactive)
 (defun lurk-cycle-contexts-forward ()
   (interactive)

-  (lurk-cycle-contexts))
+  (lurk-cycle-contexts)
+  (lurk-highlight-current-context)
+  (lurk-render-prompt)
+  (if lurk-zoomed
+      (lurk-zoom-in (lurk-current-context))))

 
 (defun lurk-cycle-contexts-reverse ()
   (interactive)
 
 (defun lurk-cycle-contexts-reverse ()
   (interactive)

-  (lurk-cycle-contexts t))
+  (lurk-cycle-contexts t)
+  (lurk-highlight-current-context)
+  (lurk-render-prompt)
+  (if lurk-zoomed
+      (lurk-zoom-in (lurk-current-context))))

 
 (defvar lurk-zoomed nil
   "Keeps track of zoom status.")
 
 (defvar lurk-zoomed nil
   "Keeps track of zoom status.")


@@ -1026,21 +1330,14 @@ in which case they match anything.")
   (interactive)
   (if lurk-zoomed
       (lurk-zoom-out)
   (interactive)
   (if lurk-zoomed
       (lurk-zoom-out)

-    (lurk-zoom-in lurk-current-context))
+    (lurk-zoom-in (lurk-current-context)))

   (setq lurk-zoomed (not lurk-zoomed)))
 
   (setq lurk-zoomed (not lurk-zoomed)))
 

-(defun lurk-history-next ()
-  (interactive)
-  (lurk-history-cycle -1))
-
-(defun lurk-history-prev ()
-  (interactive)
-  (lurk-history-cycle +1))

 
 (defun lurk-complete-input ()
   (interactive)
   (let ((completion-ignore-case t))
 
 (defun lurk-complete-input ()
   (interactive)
   (let ((completion-ignore-case t))

-    (when (and (>= (point) lurk-input-marker))
+    (when (>= (point) lurk-input-marker)

       (pcase (buffer-substring lurk-input-marker (point))
         ((rx (: "/" (let cmd-str (+ (not whitespace))) (+ " ") (* (not whitespace)) string-end))
          (let ((space-idx (save-excursion
       (pcase (buffer-substring lurk-input-marker (point))
         ((rx (: "/" (let cmd-str (+ (not whitespace))) (+ " ") (* (not whitespace)) string-end))
          (let ((space-idx (save-excursion


@@ -1061,20 +1358,11 @@ in which case they match anything.")
                              (re-search-backward " " lurk-input-marker t)))
                 (start (if space-idx (+ 1 space-idx) lurk-input-marker)))
            (unless (string-prefix-p "/" (buffer-substring start end))
                              (re-search-backward " " lurk-input-marker t)))
                 (start (if space-idx (+ 1 space-idx) lurk-input-marker)))
            (unless (string-prefix-p "/" (buffer-substring start end))

-             (completion-in-region start end (lurk-get-context-users lurk-current-context)))))))))
-
-(defun lurk-enter ()
-  "Enter current contents of line after prompt."
-  (interactive)
-  (with-current-buffer "*lurk*"
-    (let ((line (buffer-substring lurk-input-marker (point-max))))
-      (push line lurk-history)
-      (setq lurk-history-index nil)
-      (let ((inhibit-read-only t))
-        (delete-region lurk-input-marker (point-max)))
-      (lurk-enter-string line))))
-
-
+             (let* ((users (lurk-get-context-users (lurk-current-context)))
+                    (users-no@ (mapcar
+                                (lambda (u) (car (split-string u "@" t)))
+                                users)))
+               (completion-in-region start end users-no@)))))))))

 
 ;;; Mode
 ;;
 
 ;;; Mode
 ;;


@@ -1082,35 +1370,36 @@ in which case they match anything.")
 (defvar lurk-mode-map
   (let ((map (make-sparse-keymap)))
     (define-key map (kbd "RET") 'lurk-enter)
 (defvar lurk-mode-map
   (let ((map (make-sparse-keymap)))
     (define-key map (kbd "RET") 'lurk-enter)

-    (define-key map (kbd "<tab>") 'lurk-complete-input)
+    (define-key map (kbd "TAB") 'lurk-complete-input)

     (define-key map (kbd "C-c C-z") 'lurk-toggle-zoom)
     (define-key map (kbd "C-c C-z") 'lurk-toggle-zoom)

-    (define-key map (kbd "<C-tab>") 'lurk-cycle-contexts-forward)
-    (define-key map (kbd "<C-S-tab>") 'lurk-cycle-contexts-reverse)

     (define-key map (kbd "<C-up>") 'lurk-history-prev)
     (define-key map (kbd "<C-down>") 'lurk-history-next)
     (define-key map (kbd "<C-up>") 'lurk-history-prev)
     (define-key map (kbd "<C-down>") 'lurk-history-next)

+    (define-key map (kbd "<C-tab>") 'lurk-cycle-contexts-forward)
+    (define-key map (kbd "<C-S-iso-lefttab>") 'lurk-cycle-contexts-reverse)
+    (define-key map (kbd "<C-S-tab>") 'lurk-cycle-contexts-reverse)
+    (when (fboundp 'evil-define-key*)
+      (evil-define-key* 'motion map
+        (kbd "TAB") 'lurk-complete-input))

     map))
 
     map))
 

-(defvar lurk-mode-map)
-

 (define-derived-mode lurk-mode text-mode "lurk"
 (define-derived-mode lurk-mode text-mode "lurk"

-  "Major mode for LURK.")
+  "Major mode for lurk.")

 
 (when (fboundp 'evil-set-initial-state)
   (evil-set-initial-state 'lurk-mode 'insert))
 
 
 (when (fboundp 'evil-set-initial-state)
   (evil-set-initial-state 'lurk-mode 'insert))
 

-

 ;;; Main start procedure
 ;;
 
 ;;; Main start procedure
 ;;
 

+;;;###autoload

 (defun lurk ()
 (defun lurk ()

-  "Switch to *lurk* buffer."
+  "Start lurk or just switch to the lurk buffer if one already exists."

   (interactive)
   (if (get-buffer "*lurk*")
       (switch-to-buffer "*lurk*")
     (switch-to-buffer "*lurk*")
     (lurk-mode)
     (lurk-setup-buffer))
   (interactive)
   (if (get-buffer "*lurk*")
       (switch-to-buffer "*lurk*")
     (switch-to-buffer "*lurk*")
     (lurk-mode)
     (lurk-setup-buffer))

-  "Started LURK.")
-
+  "Started lurk.")

 
 ;;; lurk.el ends here
 
 ;;; lurk.el ends here