Added Riece pkg subtree

[packages] / xemacs-packages / riece / lisp / riece-foolproof.el

diff --git a/xemacs-packages/riece/lisp/riece-foolproof.el b/xemacs-packages/riece/lisp/riece-foolproof.el
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+;;; riece-foolproof.el --- prevent miss-operation in the command buffer -*- lexical-binding: t -*-
+;; Copyright (C) 2004 TAKAHASHI Kaoru
+
+;; Author: TAKAHASHI Kaoru <kaoru@kaisei.org>
+;; Keywords: IRC, riece
+
+;; This file is part of Riece.
+
+;; This program 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 program is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Commentary:
+
+;; NOTE: This is an add-on module for Riece.
+
+;;; Code:
+
+(eval-when-compile
+  (require 'riece-identity)
+  (require 'riece-display))
+
+(defconst riece-foolproof-description
+  "Prevent miss-operation in the command buffer.")
+
+(defun riece-foolproof-get-channel-window (identity)
+  (get-buffer-window
+   (cdr (riece-identity-assoc
+        identity riece-channel-buffer-alist))))
+
+(defun riece-foolproof-command-send-message-function ()
+  (when (get 'riece-foolproof 'riece-addon-enabled)
+    (unless (or (not riece-channel-buffer-mode)
+               (riece-foolproof-get-channel-window
+                riece-current-channel))
+      (error "Channel %s is not displayed"
+            (riece-identity-prefix riece-current-channel)))
+    (when (text-property-not-all
+          (riece-line-beginning-position) (riece-line-end-position)
+          'invisible nil)
+      (error "Invisible text included: %s"
+            (buffer-substring-no-properties
+             (riece-line-beginning-position)
+             (riece-line-end-position))))
+    (when executing-kbd-macro
+      (error "%s" "Forbidden to run keyboard macro"))))
+
+(defun riece-foolproof-insinuate ()
+  (add-hook 'riece-command-send-message-hook
+           'riece-foolproof-command-send-message-function))
+
+(defun riece-foolproof-uninstall ()
+  (remove-hook 'riece-command-send-message-hook
+              'riece-foolproof-command-send-message-function))
+
+(provide 'riece-foolproof)
+
+;;; riece-foolproof.el ends here