/usr/share/emacs/site-lisp/w3m/w3m-fb.el is in w3m-el 1.4.538+0.20141022-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 | ;;; w3m-fb.el --- frame-local buffers support for Emacs-w3m
;;; Copyright (C) 2005, 2006 Matthew P. Hodges
;; Author: Matthew P. Hodges <MPHodges@member.fsf.org>
;; Version: $Id: w3m-fb.el,v 1.4 2006/09/20 09:26:42 yamaoka Exp $
;; w3m-fb.el 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.
;; w3m-fb.el 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.
;;; Commentary:
;;
;; With this mode switched on, W3M buffers are associated with the
;; frame on which they were created. Only tabs for the current
;; frame's W3M buffers are shown (with non-nil w3m-use-tab); other
;; affected commands are w3m-next-buffer w3m-previous-buffer,
;; w3m-select-buffer and w3m-quit.
;;
;; Switch the mode on programmatically with:
;;
;; (w3m-fb-mode 1)
;;
;; or toggle interactively with M-x w3m-fb-mode RET.
;;; Code:
(defconst w3m-fb-version "1.0.0"
"Version number of this package.")
(eval-when-compile
(autoload 'w3m-delete-buffer "w3m" nil t)
(autoload 'w3m-list-buffers "w3m-util")
(autoload 'w3m-next-buffer "w3m" nil t)
(defvar w3m-pop-up-frames))
(eval-and-compile
(defalias 'w3m-fb-frame-parameter
(cond
((fboundp 'frame-parameter)
'frame-parameter)
((fboundp 'frame-property)
'frame-property)
(t
(error "No frame parameter/property function")))))
(defvar w3m-fb-delete-frame-functions
(cond
((boundp 'delete-frame-functions)
'delete-frame-functions)
((boundp 'delete-frame-hook)
'delete-frame-hook)
(t
(error "No delete-frame hook/functions variable found")))
"Symbol associated with `delete-frame' hooks.")
(defvar w3m-fb-list-buffers-frame nil
"Frame to list buffers for in `w3m-list-buffers'.
Bind this if the buffers associated with a frame other than the
selected frame are required.")
;; Customizable variables
(defgroup w3m-fb nil
"Frame local buffers for Emacs-w3m."
:group 'w3m)
(defcustom w3m-fb-delete-frame-kill-buffers t
"If non-nil, kill W3M buffers after deleting frames."
:group 'w3m-fb
:type 'boolean
:set (lambda (sym val)
(set sym val)
(when (boundp 'w3m-fb-mode)
(if w3m-fb-mode
(add-hook w3m-fb-delete-frame-functions
'w3m-fb-delete-frame-buffers)
(remove-hook w3m-fb-delete-frame-functions
'w3m-fb-delete-frame-buffers)))))
;; Internal variables
(defvar w3m-fb-buffer-list nil
"List of w3m buffers associated with the selected frame.")
(defvar w3m-fb-inhibit-buffer-selection nil
"Non-nil to inhibit selecting a suitable w3m buffer.")
;; Internal functions
(defun w3m-fb-delete-frame-buffers (&optional frame)
"Delete W3M buffers associated with frame FRAME."
(let* ((w3m-fb-list-buffers-frame frame)
(buffers (w3m-list-buffers))
;; Now bind w3m-fb-mode to nil so that w3m-delete-buffer
;; doesn't call w3m-quit when there are w3m buffers belonging
;; to other frames.
(w3m-fb-mode nil)
(w3m-fb-inhibit-buffer-selection t))
(save-window-excursion
(dolist (b buffers)
(with-current-buffer b
(w3m-delete-buffer))))))
;; Could use set-frame-parameter here, but it isn't portable
(defun w3m-fb-set-frame-parameter (frame parameter value)
"Set for frame FRAME parameter PARAMETER to VALUE."
(modify-frame-parameters frame (list (cons parameter value))))
(defun w3m-fb-add ()
"Add current buffer to `w3m-fb-buffer-list'."
(let ((val (w3m-fb-frame-parameter nil 'w3m-fb-buffer-list)))
(w3m-fb-set-frame-parameter
nil 'w3m-fb-buffer-list (nconc val (list (current-buffer))))))
(defun w3m-fb-remove ()
"Remove current buffer from `w3m-fb-buffer-list'.
Applies to all frames."
(when (eq major-mode 'w3m-mode)
(let (val)
(dolist (f (frame-list))
(setq val (w3m-fb-frame-parameter f 'w3m-fb-buffer-list))
(w3m-fb-set-frame-parameter
f 'w3m-fb-buffer-list (delq (current-buffer) val))))))
(defun w3m-fb-associate ()
"Associate all `w3m-mode' buffers with a frame."
(let (buffers done rest)
;; Buffers displayed in windows
(dolist (f (frame-list))
(setq buffers nil)
(dolist (w (window-list f nil (frame-selected-window f)))
(when (with-current-buffer (window-buffer w)
(eq major-mode 'w3m-mode))
(setq buffers (nconc buffers (list (window-buffer w))))
(setq done (nconc done (list (window-buffer w))))))
(w3m-fb-set-frame-parameter
f 'w3m-fb-buffer-list buffers))
;; Buffers not displayed in windows; add to selected frame
(let ((w3m-fb-mode nil))
(setq rest (w3m-list-buffers)))
(dolist (b done)
(setq rest (delq b rest)))
(when rest
(w3m-fb-set-frame-parameter
nil 'w3m-fb-buffer-list
(nconc (w3m-fb-frame-parameter nil 'w3m-fb-buffer-list) rest)))))
(defun w3m-fb-dissociate ()
"Disassociate `w3m-mode' buffers from frames."
(dolist (f (frame-list))
(w3m-fb-set-frame-parameter f 'w3m-fb-buffer-list nil)))
(defun w3m-fb-select-buffer ()
"Select an appropriate W3M buffer to display."
;; If there are w3m buffers belonging to this frame, ensure one is
;; selected; if not make sure that we're not displaying a w3m
;; buffer
(cond
;; Select w3m buffer belonging to frame, if one is available
((w3m-list-buffers)
(unless (memq (current-buffer) (w3m-list-buffers))
(w3m-next-buffer -1)))
(t
;; If no w3m buffers belong to frame, don't display any w3m buffer
(while (eq major-mode 'w3m-mode)
;; (assert (eq (current-buffer)
;; (window-buffer (selected-window))))
(bury-buffer)))))
;; Minor mode setup
;;;###autoload
(define-minor-mode w3m-fb-mode
"Toggle W3M Frame Buffer mode.
This allows frame-local lists of buffers (tabs)."
:init-value nil
:group 'w3m-fb
:global t
(if (and w3m-fb-mode
(if w3m-pop-up-frames
(prog1
(setq w3m-fb-mode nil)
(message "\
W3M Frame Buffer mode not activated (non-nil w3m-pop-up-frames)")
(sit-for 2))
t))
(progn
(add-hook 'w3m-mode-hook 'w3m-fb-add)
(add-hook 'kill-buffer-hook 'w3m-fb-remove)
(when w3m-fb-delete-frame-kill-buffers
(add-hook w3m-fb-delete-frame-functions
'w3m-fb-delete-frame-buffers))
(w3m-fb-associate))
(remove-hook 'w3m-mode-hook 'w3m-fb-add)
(remove-hook 'kill-buffer-hook 'w3m-fb-remove)
(remove-hook w3m-fb-delete-frame-functions 'w3m-fb-delete-frame-buffers)
(w3m-fb-dissociate)))
(provide 'w3m-fb)
;;; w3m-fb.el ends here
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