+(defun murk-add-formatting (string)
+ (with-temp-buffer
+ (insert string)
+ (goto-char (point-min))
+ (let ((bold nil)
+ (italics nil)
+ (underline nil)
+ (strikethrough nil)
+ (prev-point (point)))
+ (while (re-search-forward (rx (or (any "\x02\x1D\x1F\x1E\x0F")
+ (: "\x03" (+ digit) (opt "," (* digit)))))
+ nil t)
+ (let ((beg (+ (match-beginning 0) 1)))
+ (if bold
+ (add-face-text-property prev-point beg '(:weight bold)))
+ (if italics
+ (add-face-text-property prev-point beg '(:slant italic)))
+ (if underline
+ (add-face-text-property prev-point beg '(:underline t)))
+ (if strikethrough
+ (add-face-text-property prev-point beg '(:strike-through t)))
+ (pcase (match-string 0)
+ ("\x02" (setq bold (not bold)))
+ ("\x1D" (setq italics (not italics)))
+ ("\x1F" (setq underline (not underline)))
+ ("\x1E" (setq strikethrough (not strikethrough)))
+ ("\x0F" ; Reset
+ (setq bold nil)
+ (setq italics nil)
+ (setq underline nil)
+ (setq strikethrough nil))
+ (_))
+ (delete-region (match-beginning 0) (match-end 0))
+ (setq prev-point (point)))))
+ (buffer-string)))
+
+
+;;; Message evaluation
+;;
+
+(defun murk-eval-msg-string (server string)
+ (if murk-debug
+ (murk-display-string nil nil string))
+ (let* ((msg (murk-string->msg string)))
+ (pcase (murk-msg-cmd msg)
+ ("PING"
+ (murk-send-msg server
+ (murk-msg nil nil "PONG" (murk-msg-params msg))))
+
+ ("PONG")
+
+ (_
+ (murk-display-notice nil (murk-msg->string msg))))))
+
+;;; Commands
+;;
+
+(defvar murk-command-table
+ '(("DEBUG" "Toggle debug mode on/off." murk-command-debug murk-boolean-completions)
+ ("HEADER" "Toggle display of header." murk-command-header murk-boolean-completions)
+ ("CONNECT" "Connect to an IRC network." murk-command-connect murk-network-completions)
+ ("NETWORKS" "List known IRC networks." murk-command-networks)
+ ("QUIT" "Disconnect from current network." murk-command-quit)
+ ("NICK" "Change nick." murk-command-nick)
+ ("MSG" "Send private message to user." murk-command-msg murk-nick-completions)
+ ("CLEAR" "Clear buffer text." murk-command-clear murk-context-completions)
+ ("HELP" "Display help on client commands." murk-command-help murk-help-completions))
+ "Table of commands explicitly supported by murk.")
+
+(defun murk-command-help (params)
+ (if params
+ (let* ((cmd-str (upcase (car params)))
+ (row (assoc cmd-str murk-command-table #'equal)))
+ (if row
+ (progn
+ (murk-display-notice nil "Help for \x02" cmd-str "\x02:")
+ (murk-display-notice nil " " (elt row 1)))
+ (murk-display-notice nil "No such (client-interpreted) command.")))
+ (murk-display-notice nil "Client-interpreted commands:")
+ (dolist (row murk-command-table)
+ (murk-display-notice nil " \x02" (elt row 0) "\x02: " (elt row 1)))
+ (murk-display-notice nil "Use /HELP COMMAND to display information about a specific command.")))
+
+(defun murk-command-debug (params)
+ (setq murk-debug
+ (if params
+ (if (equal (upcase (car params)) "ON")
+ t
+ nil)
+ (not murk-debug)))
+ (murk-display-notice nil "Debug mode now " (if murk-debug "on" "off") "."))
+
+(defun murk-command-clear (params)
+ (if (not params)
+ (murk-clear-buffer)
+ (dolist (context params)
+ (murk-clear-context context))))
+
+
+;;; Command entering
+;;
+
+(defun murk-enter-string (string)
+ (if (string-prefix-p "/" string)
+ (pcase string
+ ((rx (: "/" (let cmd-str (+ (not whitespace)))
+ (opt (+ whitespace)
+ (let params-str (+ anychar))
+ string-end)))
+ (let ((command-row (assoc (upcase cmd-str) murk-command-table #'equal))
+ (params (if params-str
+ (split-string params-str nil t)
+ nil)))
+ (if (and command-row (elt command-row 2))
+ (funcall (elt command-row 2) params)
+ (murk-send-msg (murk-msg nil nil (upcase cmd-str) params)))))
+ (_
+ (murk-display-error "Badly formed command.")))
+ (unless (string-empty-p string)
+ (if (murk-current-context)
+ (progn
+ (murk-send-msg server
+ (murk-msg nil nil "PRIVMSG"
+ (murk-context-name murk-current-context)
+ string))
+ (murk-display-message murk-nick (murk-context->string (murk-current-context)) string))
+ (murk-display-error "No current context.")))))
+
+
+;;; Command history
+;;
+
+(defvar murk-history nil
+ "Commands and messages sent in current session.")
+
+(defvar murk-history-index nil)
+
+(defun murk-history-cycle (delta)
+ (when murk-history
+ (with-current-buffer "*murk*"
+ (if murk-history-index
+ (setq murk-history-index
+ (max 0
+ (min (- (length murk-history) 1)
+ (+ delta murk-history-index))))
+ (setq murk-history-index 0))
+ (delete-region murk-input-marker (point-max))
+ (insert (elt murk-history murk-history-index)))))
+
+
+;;; Interactive commands
+;;
+
+(defun murk-enter ()
+ "Enter current contents of line after prompt."
+ (interactive)
+ (with-current-buffer "*murk*"
+ (let ((line (buffer-substring murk-input-marker (point-max))))
+ (push line murk-history)
+ (setq murk-history-index nil)
+ (let ((inhibit-read-only t))
+ (delete-region murk-input-marker (point-max)))
+ (murk-enter-string line))))
+