/* Buffer insertion/deletion and gap motion for GNU Emacs.
- Copyright (C) 1985-1986, 1993-1995, 1997-2015 Free Software
+ Copyright (C) 1985-1986, 1993-1995, 1997-2016 Free Software
Foundation, Inc.
This file is part of GNU Emacs.
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 3 of the License, 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
if (i == 0)
break;
/* If a quit is requested, stop copying now.
- Change BYTEPOS to be where we have actually moved the gap to. */
+ Change BYTEPOS to be where we have actually moved the gap to.
+ Note that this cannot happen when we are called to make the
+ gap larger or smaller, since make_gap_larger and
+ make_gap_smaller prevent QUIT by setting inhibit-quit. */
if (QUITP)
{
bytepos = new_s1;
if (i == 0)
break;
/* If a quit is requested, stop copying now.
- Change BYTEPOS to be where we have actually moved the gap to. */
+ Change BYTEPOS to be where we have actually moved the gap to.
+ Note that this cannot happen when we are called to make the
+ gap larger or smaller, since make_gap_larger and
+ make_gap_smaller prevent QUIT by setting inhibit-quit. */
if (QUITP)
{
bytepos = new_s1;
enlarge_buffer_text (current_buffer, nbytes_added);
- /* Prevent quitting in move_gap. */
+ /* Prevent quitting in gap_left. We cannot allow a QUIT there,
+ because that would leave the buffer text in an inconsistent
+ state, with 2 gap holes instead of just one. */
tem = Vinhibit_quit;
Vinhibit_quit = Qt;
if (GAP_SIZE - nbytes_removed < GAP_BYTES_MIN)
nbytes_removed = GAP_SIZE - GAP_BYTES_MIN;
- /* Prevent quitting in move_gap. */
+ /* Prevent quitting in gap_right. We cannot allow a QUIT there,
+ because that would leave the buffer text in an inconsistent
+ state, with 2 gap holes instead of just one. */
tem = Vinhibit_quit;
Vinhibit_quit = Qt;