return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil;
}
+DEFUN ("force-mode-line-update", Fforce_mode_line_update,
+ Sforce_mode_line_update, 0, 1, 0,
+ doc: /* Force redisplay of the current buffer's mode line and header line.
+With optional non-nil ALL, force redisplay of all mode lines and
+header lines. This function also forces recomputation of the
+menu bar menus and the frame title. */)
+ (Lisp_Object all)
+{
+ if (!NILP (all))
+ {
+ update_mode_lines = 10;
+ /* FIXME: This can't be right. */
+ current_buffer->prevent_redisplay_optimizations_p = true;
+ }
+ else if (buffer_window_count (current_buffer))
+ {
+ bset_update_mode_line (current_buffer);
+ current_buffer->prevent_redisplay_optimizations_p = true;
+ }
+ return all;
+}
+
DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p,
1, 1, 0,
doc: /* Mark current buffer as modified or unmodified according to FLAG.
A non-nil FLAG means mark the buffer modified. */)
(Lisp_Object flag)
{
- Lisp_Object fn;
+ Frestore_buffer_modified_p (flag);
+
+ /* Set update_mode_lines only if buffer is displayed in some window.
+ Packages like jit-lock or lazy-lock preserve a buffer's modified
+ state by recording/restoring the state around blocks of code.
+ Setting update_mode_lines makes redisplay consider all windows
+ (on all frames). Stealth fontification of buffers not displayed
+ would incur additional redisplay costs if we'd set
+ update_modes_lines unconditionally.
+
+ Ideally, I think there should be another mechanism for fontifying
+ buffers without "modifying" buffers, or redisplay should be
+ smarter about updating the `*' in mode lines. --gerd */
+ return Fforce_mode_line_update (Qnil);
+}
+DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p,
+ Srestore_buffer_modified_p, 1, 1, 0,
+ doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
+It is not ensured that mode lines will be updated to show the modified
+state of the current buffer. Use with care. */)
+ (Lisp_Object flag)
+{
#ifdef CLASH_DETECTION
+ Lisp_Object fn;
+
/* If buffer becoming modified, lock the file.
If buffer becoming unmodified, unlock the file. */
or increase MODIFF. */
: MODIFF++);
- /* Set update_mode_lines only if buffer is displayed in some window.
- Packages like jit-lock or lazy-lock preserve a buffer's modified
- state by recording/restoring the state around blocks of code.
- Setting update_mode_lines makes redisplay consider all windows
- (on all frames). Stealth fontification of buffers not displayed
- would incur additional redisplay costs if we'd set
- update_modes_lines unconditionally.
-
- Ideally, I think there should be another mechanism for fontifying
- buffers without "modifying" buffers, or redisplay should be
- smarter about updating the `*' in mode lines. --gerd */
- if (buffer_window_count (current_buffer))
- {
- update_mode_lines = 10;
- current_buffer->prevent_redisplay_optimizations_p = 1;
- }
-
- return flag;
-}
-
-DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p,
- Srestore_buffer_modified_p, 1, 1, 0,
- doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
-It is not ensured that mode lines will be updated to show the modified
-state of the current buffer. Use with care. */)
- (Lisp_Object flag)
-{
-#ifdef CLASH_DETECTION
- Lisp_Object fn;
-
- /* If buffer becoming modified, lock the file.
- If buffer becoming unmodified, unlock the file. */
-
- fn = BVAR (current_buffer, file_truename);
- /* Test buffer-file-name so that binding it to nil is effective. */
- if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename)))
- {
- bool already = SAVE_MODIFF < MODIFF;
- if (!already && !NILP (flag))
- lock_file (fn);
- else if (already && NILP (flag))
- unlock_file (fn);
- }
-#endif /* CLASH_DETECTION */
-
- SAVE_MODIFF = NILP (flag) ? MODIFF : 0;
return flag;
}
/* Run replace_buffer_in_windows before making another buffer current
since set-window-buffer-start-and-point will refuse to make another
buffer current if the selected window does not show the current
- buffer. (Bug#10114) */
+ buffer (bug#10114). */
replace_buffer_in_windows (buffer);
/* Exit if replacing the buffer in windows has killed our buffer. */
if (narrowed)
error ("Changing multibyteness in a narrowed buffer");
+ invalidate_buffer_caches (current_buffer, BEGV, ZV);
+
if (NILP (flag))
{
ptrdiff_t pos, stop;
BUF_COMPUTE_UNCHANGED (buf, start, end);
- /* If BUF is visible, consider updating the display if ... */
- if (buffer_window_count (buf) > 0)
- {
- /* ... it's visible in other window than selected, */
- if (buf != XBUFFER (XWINDOW (selected_window)->contents))
- windows_or_buffers_changed = 11;
- /* ... or if we modify an overlay at the end of the buffer
- and so we cannot be sure that window end is still valid. */
- else if (end >= ZV && start <= ZV)
- windows_or_buffers_changed = 12;
- }
+ bset_redisplay (buf);
++BUF_OVERLAY_MODIFF (buf);
}
if (PER_BUFFER_IDX (offset) == 0)
/* Did a DEFVAR_PER_BUFFER without initializing the corresponding
- slot of buffer_local_flags */
+ slot of buffer_local_flags. */
emacs_abort ();
}
-/* initialize the buffer routines */
+/* Initialize the buffer routines. */
void
syms_of_buffer (void)
{
DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename),
Qstringp,
- doc: /* Name of file visited in current buffer, or nil if not visiting a file. */);
+ doc: /* Name of file visited in current buffer, or nil if not visiting a file.
+This should be an absolute file name. */);
DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename),
Qstringp,
defsubr (&Sbuffer_local_value);
defsubr (&Sbuffer_local_variables);
defsubr (&Sbuffer_modified_p);
+ defsubr (&Sforce_mode_line_update);
defsubr (&Sset_buffer_modified_p);
defsubr (&Sbuffer_modified_tick);
defsubr (&Sbuffer_chars_modified_tick);