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;;; erc-tab.el --- Provide a tab-style interface to erc buffers.
;; Copyright (C) 2003 David Edmondson <dme@dme.org>
;; Author: David Edmondson <dme@dme.org>
;; Keywords: tabs, faces
;; URL: http://www.emacswiki.org/cgi-bin/wiki.pl?ErcTabs
;; This file is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; This file 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., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; Provides tabs in the header-line to access different erc buffers.
;; This only works if your emacs supports a header line (emacs 21
;; does). Add to your ~/.emacs:
;; (require 'erc-tab)
;; (erc-tab-mode 1)
;; The ideas and implementation here are taken from emacs-w3m.
;; Todo:
;;
;; * change the colour of the text in a tab to reflect activity and
;; the type of activity (a combination of erc-track and xchat
;; behaviour). DONE: not as complex as erc-track, but useful for
;; discussion.
(require 'erc)
; anything else?
;;; Code:
(defconst erc-tab-version "$Revision$"
"ERC tab mode revision")
(defgroup erc-tab nil
"Provide a tab interface to ERC buffers.")
(defcustom erc-tab-topic-format
'(" " nick " " channel-modes " " topic)
"Format of the topic in the header-line in erc-mode.
Only used in Emacs 21. This variable is processed using
`erc-prepare-mode-line-format'."
:group 'erc-tab
:type 'sexp)
(defcustom erc-tab-max-width 16
"Maximum width of any one channel tab."
:group 'erc-tab
:type 'number)
; this removes server buffers for me
(defcustom erc-tab-interesting-buffers-regexp "^[^:]*$"
"Regular expression used to look for interesting buffers. Buffers whose
names match this expression will have a tab created in erc buffers."
:group 'erc-tab
:type 'regexp)
(defface erc-tab-unselected-face
'((((type x w32 mac) (class color))
:background "Gray50" :foreground "Gray20"
:underline "Gray85" :box (:line-width -1 :style released-button))
(((class color))
(:background "cyan" :foreground "black" :underline "blue")))
"*Face to fontify unselected tabs."
:group 'erc-tab)
; TODO: use `:inherit' from `erc-tab-unselected-face' and then
; change the foreground.
(defface erc-tab-unselected-active-face
'((((type x w32 mac) (class color))
:background "Gray50" :foreground "blue"
:underline "Gray85" :box (:line-width -1 :style released-button))
(((class color))
(:background "cyan" :foreground "yellow" :underline "blue")))
"*Face to fontify unselected tabs."
:group 'erc-tab)
(defface erc-tab-selected-face
'((((type x w32 mac) (class color))
:background "Gray85" :foreground "black"
:underline "Gray85" :box (:line-width -1 :style released-button))
(((class color))
(:background "blue" :foreground "black" :underline "blue"))
(t (:underline t)))
"*Face to fontify selected tab."
:group 'erc-tab)
(defface erc-tab-topic-face
'((((type x w32 mac) (class color))
:foreground "Grey85"
:underline "Gray85" :box (:line-width -1 :style released-button))
(((class color))
(:background "cyan" :foreground "black" :underline "blue"))
(t (:underline t)))
"*Face to fontify the tab gutter, which contains the topic."
:group 'erc-tab)
;;;
(defun erc-tab-buffer-list ()
"Return all erc buffers."
(mapcar
'buffer-name
(erc-buffer-list)))
(defun erc-tab-all-visible-buffer-names ()
"Return all visible channel or query buffer names."
(mapcar
'buffer-name
(erc-buffer-filter
(lambda () (get-buffer-window (current-buffer) 'visible)))))
(defun erc-tab-all-interesting-buffer-names ()
"Return all interesting erc buffer names."
(mapcar
'buffer-name
(erc-buffer-filter
(lambda ()
(string-match erc-tab-interesting-buffers-regexp
(buffer-name (current-buffer)))))))
(defun erc-tab-make-keymap (buffer)
(let ((map (make-sparse-keymap))
(fn `(lambda (e) (interactive "e")
(select-window (car (event-start e)))
(switch-to-buffer ,buffer))))
(define-key map [header-line down-mouse-1] 'ignore)
(define-key map [header-line drag-mouse-1] fn)
(define-key map [header-line mouse-1] fn)
map))
(defun erc-tab-update ()
"Update all tabs, as necessary."
; buffers which are visible don't belong in erc-tab-modified-buffers
(mapcar (lambda (b)
(setq erc-tab-modified-buffers
(remove b erc-tab-modified-buffers)))
(erc-tab-all-visible-buffer-names))
(mapcar 'erc-tab-update-buffer (erc-tab-buffer-list)))
(defun erc-tab-update-buffer (buffer)
"Update the tabs in erc buffer `buffer'."
(save-excursion
(set-buffer buffer)
(setq header-line-format
(append
(mapcar
(lambda (b)
(propertize
(concat " " (truncate-string-to-width
b (- erc-tab-max-width 2)) " ")
'face (cond
((eq b buffer)
'erc-tab-selected-face)
((member b erc-tab-modified-buffers)
'erc-tab-unselected-active-face)
(t
'erc-tab-unselected-face))
'local-map (erc-tab-make-keymap b)))
(erc-sort-strings (erc-tab-all-interesting-buffer-names)))
(list
(let* ((topic-text
(mapconcat 'identity
(erc-prepare-mode-line-format
erc-tab-topic-format) ""))
(help-text
(with-temp-buffer
(insert topic-text)
(fill-region (point-min) (point-max))
(buffer-string))))
(propertize topic-text
'help-echo help-text
'face 'erc-tab-topic-face)))))))
(defvar erc-tab-modified-buffers nil)
(defun erc-tab-buffer-updated ()
"Hook for `erc-insert-post-hook'."
(let ((this-channel (erc-default-target)))
(if (and (not (get-buffer-window (current-buffer) 'visible))
(not (memq this-channel erc-tab-modified-buffers)))
(setq erc-tab-modified-buffers
(cons this-channel erc-tab-modified-buffers)))))
(defun erc-tab-JOIN (proc parsed)
(erc-tab-update)
nil)
; TODO: only really needs to update the buffer that changed.
(defun erc-tab-TOPIC (proc parsed)
(erc-tab-update)
nil)
(defun erc-tab-remove ()
"Unset the header line for all erc buffers."
(save-excursion
(mapcar
(lambda (b) (set-buffer b) (setq header-line-format nil))
(erc-tab-buffer-list))))
;;; Module;
(setq erc-tab-server-hooks '("JOIN" "TOPIC"))
;;;###autoload (autoload 'erc-tab-mode "erc-tab" nil t)
(define-erc-module tab nil
"This mode provides a tab interface to ERC buffers."
; enable:
((if (featurep 'xemacs)
(defadvice switch-to-buffer (after erc-update (&rest args) activate)
(erc-tab-update))
(add-hook 'window-configuration-change-hook
'erc-tab-update))
(mapcar
(lambda (message)
(add-hook (intern (concat "erc-server-" message "-hook"))
(intern (concat "erc-tab-" message))
t))
erc-tab-server-hooks)
(add-hook 'erc-kill-server-hook 'erc-tab-update t)
(add-hook 'erc-kill-channel-hook 'erc-tab-update t)
(add-hook 'erc-kill-buffer-hook 'erc-tab-update t)
(add-hook 'erc-insert-post-hook 'erc-tab-buffer-updated)
; stop the normal header-line updates
(remove-hook 'erc-update-mode-line-hooks 'erc-update-header-line)
(erc-tab-update))
; disable:
; re-enable normal header-line updates
((add-hook 'erc-update-mode-line-hooks 'erc-update-header-line)
(remove-hook 'erc-insert-post-hook 'erc-tab-buffer-updated)
(remove-hook 'erc-kill-buffer-hook 'erc-tab-update)
(remove-hook 'erc-kill-channel-hook 'erc-tab-update)
(remove-hook 'erc-kill-server-hook 'erc-tab-update)
(mapcar
(lambda (message)
(remove-hook (intern (concat "erc-server-" message "-hook"))
(intern (concat "erc-tab-" message))))
(reverse erc-tab-server-hooks))
(if (featurep 'xemacs)
(ad-disable-advice 'switch-to-buffer 'after 'erc-update)
(remove-hook 'window-configuration-change-hook
'erc-tab-update))
(erc-tab-remove)))
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