* m/iris4d.h (UNEXEC): Move definition ...

[bpt/emacs.git] / lisp / reveal.el

diff --git a/lisp/reveal.el b/lisp/reveal.el
index 3c76c2a..ff5c880 100644 (file)
--- a/lisp/reveal.el
+++ b/lisp/reveal.el
@@ -1,17 +1,17 @@
 ;;; reveal.el --- Automatically reveal hidden text at point
 
 ;; Copyright (C) 2000, 2001, 2002, 2003, 2004,
-;;   2005, 2006 Free Software Foundation, Inc.
+;;   2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
 
-;; Author: Stefan Monnier <monnier@cs.yale.edu>
+;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
 ;; Keywords: outlines
 
 ;; This file is part of GNU Emacs.
 
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; GNU Emacs 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.
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
 
 ;; GNU Emacs is distributed in the hope that it will be useful,
 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -19,9 +19,7 @@
 ;; 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.
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
 
 ;;; Commentary:
 
@@ -51,7 +49,7 @@
 
 (defgroup reveal nil
   "Reveal hidden text on the fly."
-  :group 'editing)
+  :group 'convenience)
 
 (defcustom reveal-around-mark t
   "Reveal text around the mark, if active."
@@ -85,7 +83,8 @@ Each element has the form (WINDOW . OVERLAY).")
                         ;; a window which does not show this buffer any more.
                         (cond
                          ((eq (car x) (selected-window)) (cdr x))
-                         ((not (eq (window-buffer (car x)) (current-buffer)))
+                         ((not (and (window-live-p (car x))
+                                    (eq (window-buffer (car x)) (current-buffer))))
                           ;; Adopt this since it's owned by a window that's
                           ;; either not live or at least not showing this
                           ;; buffer any more.
@@ -104,35 +103,37 @@ Each element has the form (WINDOW . OVERLAY).")
                            (overlays-at (mark)))
                          (overlays-at (point))))
         (setq old-ols (delq ol old-ols))
-        (let ((inv (overlay-get ol 'invisible)) open)
-          (when (and inv
-                     ;; There's an `invisible' property.  Make sure it's
-                     ;; actually invisible, and ellipsised.
-                     (and (consp buffer-invisibility-spec)
-                          (cdr (assq inv buffer-invisibility-spec)))
-                     (or (setq open
-                               (or (overlay-get ol 'reveal-toggle-invisible)
-                                   (and (symbolp inv)
-                                        (get inv 'reveal-toggle-invisible))
-                                   (overlay-get ol 'isearch-open-invisible-temporary)))
-                         (overlay-get ol 'isearch-open-invisible)
-                         (and (consp buffer-invisibility-spec)
-                              (cdr (assq inv buffer-invisibility-spec))))
-                     (overlay-put ol 'reveal-invisible inv))
-            (push (cons (selected-window) ol) reveal-open-spots)
-            (if (null open)
-                (overlay-put ol 'invisible nil)
-              ;; Use the provided opening function and repeat (since the
-              ;; opening function might have hidden a subpart around point).
-              (setq repeat t)
-              (condition-case err
-                  (funcall open ol nil)
-                (error (message "!!Reveal-show (funcall %s %s nil): %s !!"
-                                open ol err)
-                       ;; Let's default to a meaningful behavior to avoid
-                       ;; getting stuck in an infinite loop.
-                       (setq repeat nil)
-                       (overlay-put ol 'invisible nil)))))))))
+        (when (overlay-start ol)        ;Check it's still live.
+          (let ((inv (overlay-get ol 'invisible)) open)
+            (when (and inv
+                       ;; There's an `invisible' property.  Make sure it's
+                       ;; actually invisible, and ellipsised.
+                       (and (consp buffer-invisibility-spec)
+                            (cdr (assq inv buffer-invisibility-spec)))
+                       (or (setq open
+                                 (or (overlay-get ol 'reveal-toggle-invisible)
+                                     (and (symbolp inv)
+                                          (get inv 'reveal-toggle-invisible))
+                                     (overlay-get ol 'isearch-open-invisible-temporary)))
+                           (overlay-get ol 'isearch-open-invisible)
+                           (and (consp buffer-invisibility-spec)
+                                (cdr (assq inv buffer-invisibility-spec))))
+                       (overlay-put ol 'reveal-invisible inv))
+              (push (cons (selected-window) ol) reveal-open-spots)
+              (if (null open)
+                  (overlay-put ol 'invisible nil)
+                ;; Use the provided opening function and repeat (since the
+                ;; opening function might have hidden a subpart around point
+                ;; or moved/killed some of the overlays).
+                (setq repeat t)
+                (condition-case err
+                    (funcall open ol nil)
+                  (error (message "!!Reveal-show (funcall %s %s nil): %s !!"
+                                  open ol err)
+                         ;; Let's default to a meaningful behavior to avoid
+                         ;; getting stuck in an infinite loop.
+                         (setq repeat nil)
+                         (overlay-put ol 'invisible nil))))))))))
   old-ols)
 
 (defun reveal-close-old-overlays (old-ols)