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;;; chess-kibitz.el --- Chess kibitzing, stored as annotations
;; Copyright (C) 2002, 2014 Free Software Foundation, Inc.
;; Author: John Wiegley <johnw@gnu.org>
;; Maintainer: Mario Lang <mlang@delysid.org>
;; Keywords: games
;; This 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 3, or (at your option) any later
;; version.
;;
;; This 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. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Implements chess kibitzing, stored as annotations to the game being
;; viewed or played. C-c C-c is used to save a kibitzing comment.
;;; Code:
(require 'chess-game)
(defvar chess-kibitz-input-last nil)
(defvar chess-kibitz-index nil)
(make-variable-buffer-local 'chess-kibitz-input-last)
(make-variable-buffer-local 'chess-kibitz-index)
(define-derived-mode chess-kibitz-mode text-mode "Kibitz"
"A mode for editing chess annotations."
(set-buffer-modified-p nil)
(setq chess-kibitz-input-last (copy-marker (point-max) t))
(let ((map (current-local-map)))
(define-key map [(control ?c) (control ?c)] 'chess-kibitz-save)))
(defvar chess-module-game)
(defun chess-kibitz-save ()
(interactive)
(let ((ann (buffer-substring-no-properties chess-kibitz-input-last
(point-max))))
(chess-game-run-hooks chess-module-game 'kibitz ann)
(chess-pos-add-annotation (chess-game-pos chess-kibitz-index) ann))
(set-marker chess-kibitz-input-last (point-max))
(set-buffer-modified-p nil))
(defun chess-kibitz-show-annotations (index)
(setq chess-kibitz-index index)
(erase-buffer)
(let ((position (chess-game-pos chess-module-game index))
popup)
(dolist (ann (chess-pos-annotations position))
(when (stringp ann)
(insert ann ?\n)
(setq popup t)))
(if popup
(display-buffer (current-buffer)))))
(defun chess-kibitz-handler (game event &rest args)
(cond
((eq event 'initialize)
(kill-buffer (current-buffer))
(set-buffer (generate-new-buffer "*Annotations*"))
(chess-kibitz-mode)
t)
((eq event 'switch-to-annotations)
(switch-to-buffer-other-window (current-buffer)))
((eq event 'kibitz)
(chess-kibitz-handler 'switch-to-annotations)
(save-excursion
(goto-char chess-kibitz-input-last)
(insert (car args))))
((eq event 'set-index)
(chess-kibitz-show-annotations (car args)))
((memq event '(post-undo move))
(chess-kibitz-show-annotations (chess-game-index game)))))
(provide 'chess-kibitz)
;;; chess-kibitz.el ends here
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