From: Dmitry Antipov <dmantipov@yandex.ru>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: 'struct window' cleanup #3
Date: Sun, 01 Jul 2012 19:05:31 +0400 [thread overview]
Message-ID: <4FF0673B.9010002@yandex.ru> (raw)
In-Reply-To: <838vf88s3i.fsf@gnu.org>
[-- Attachment #1: Type: text/plain, Size: 831 bytes --]
One more minor simplification: W->region_showing may be only nil or t,
so it may be reduced to a bitfield.
Hard case:
if (((!NILP (Vtransient_mark_mode)
&& !NILP (BVAR (XBUFFER (w->buffer), mark_active)))
!= !NILP (w->region_showing))
|| (!NILP (w->region_showing)
&& !EQ (w->region_showing,
Fmarker_position (BVAR (XBUFFER (w->buffer), mark)))))
There are two possible cases:
- both w->region_showing and Fmarker_position (BVAR (XBUFFER (w->buffer), mark))
are nil;
- w->region_showing is t and Fmarker_position (BVAR (XBUFFER (w->buffer), mark))
is a number, so !EQ (...) is always non-zero.
So if-statement may be simplified to:
if (((!NILP (Vtransient_mark_mode)
&& !NILP (BVAR (XBUFFER (w->buffer), mark_active)))
!= w->region_showing) || w->region_showing)
Dmitry
[-- Attachment #2: region_showing.patch --]
[-- Type: text/plain, Size: 3652 bytes --]
=== modified file 'src/window.h'
--- src/window.h 2012-06-29 11:48:08 +0000
+++ src/window.h 2012-07-01 09:55:44 +0000
@@ -198,10 +198,6 @@
as long as the window shows that buffer. */
Lisp_Object base_line_pos;
- /* If we have highlighted the region (or any part of it),
- this is the mark position that we used, as an integer. */
- Lisp_Object region_showing;
-
/* The column number currently displayed in this window's mode line,
or nil if column numbers are not being displayed. */
Lisp_Object column_number_displayed;
@@ -289,6 +285,9 @@
was last updated. */
unsigned last_had_star : 1;
+ /* Non-zero if we have highlighted the region (or any part of it). */
+ unsigned region_showing : 1;
+
/* Non-zero means current value of `start'
was the beginning of a line when it was chosen. */
unsigned start_at_line_beg : 1;
=== modified file 'src/xdisp.c'
--- src/xdisp.c 2012-06-29 18:52:54 +0000
+++ src/xdisp.c 2012-07-01 14:56:24 +0000
@@ -11202,7 +11202,7 @@
!= w->last_had_star)
|| ((!NILP (Vtransient_mark_mode)
&& !NILP (BVAR (XBUFFER (w->buffer), mark_active)))
- != !NILP (w->region_showing)))
+ != w->region_showing))
{
struct buffer *prev = current_buffer;
ptrdiff_t count = SPECPDL_INDEX ();
@@ -11400,7 +11400,7 @@
!= w->last_had_star)
|| ((!NILP (Vtransient_mark_mode)
&& !NILP (BVAR (XBUFFER (w->buffer), mark_active)))
- != !NILP (w->region_showing)))
+ != w->region_showing))
{
struct buffer *prev = current_buffer;
ptrdiff_t count = SPECPDL_INDEX ();
@@ -13105,10 +13105,7 @@
the optimization directly below this if-statement. */
if (((!NILP (Vtransient_mark_mode)
&& !NILP (BVAR (XBUFFER (w->buffer), mark_active)))
- != !NILP (w->region_showing))
- || (!NILP (w->region_showing)
- && !EQ (w->region_showing,
- Fmarker_position (BVAR (XBUFFER (w->buffer), mark)))))
+ != w->region_showing) || w->region_showing)
CHARPOS (this_line_start_pos) = 0;
/* Optimize the case that only the line containing the cursor in the
@@ -13276,7 +13273,7 @@
&& (EQ (selected_window,
BVAR (current_buffer, last_selected_window))
|| highlight_nonselected_windows)
- && NILP (w->region_showing)
+ && !w->region_showing
&& NILP (Vshow_trailing_whitespace)
&& !cursor_in_echo_area)
{
@@ -14953,7 +14950,7 @@
set the cursor. */
&& !(!NILP (Vtransient_mark_mode)
&& !NILP (BVAR (current_buffer, mark_active)))
- && NILP (w->region_showing)
+ && !w->region_showing
&& NILP (Vshow_trailing_whitespace)
/* This code is not used for mini-buffer for the sake of the case
of redisplaying to replace an echo area message; since in
@@ -16324,7 +16321,7 @@
/* Can't do this if region may have changed. */
if ((!NILP (Vtransient_mark_mode)
&& !NILP (BVAR (current_buffer, mark_active)))
- || !NILP (w->region_showing)
+ || w->region_showing
|| !NILP (Vshow_trailing_whitespace))
return 0;
@@ -17156,7 +17153,7 @@
GIVE_UP (11);
/* Likewise if showing a region. */
- if (!NILP (w->region_showing))
+ if (w->region_showing)
GIVE_UP (10);
/* Can't use this if overlay arrow position and/or string have
@@ -19134,7 +19131,7 @@
}
/* Is IT->w showing the region? */
- it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil;
+ it->w->region_showing = it->region_beg_charpos > 0;
/* Clear the result glyph row and enable it. */
prepare_desired_row (row);
next prev parent reply other threads:[~2012-07-01 15:05 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-25 8:56 'struct window' cleanup #2 Dmitry Antipov
2012-06-25 14:22 ` John Wiegley
2012-06-25 14:42 ` Dmitry Antipov
2012-06-25 14:27 ` Paul Eggert
2012-06-25 14:53 ` Stefan Monnier
2012-06-25 16:30 ` Dmitry Antipov
2012-06-25 16:35 ` martin rudalics
2012-06-25 16:49 ` Dmitry Antipov
2012-06-26 7:26 ` martin rudalics
2012-06-26 9:06 ` Dmitry Antipov
2012-06-26 15:37 ` Eli Zaretskii
2012-06-26 15:32 ` Eli Zaretskii
2012-06-26 16:49 ` Dmitry Antipov
2012-06-26 17:12 ` Eli Zaretskii
2012-06-27 0:42 ` Stefan Monnier
2012-06-27 3:03 ` Eli Zaretskii
2012-06-27 7:10 ` 'struct window' cleanup #3 Dmitry Antipov
2012-06-27 13:32 ` Stefan Monnier
2012-06-27 17:37 ` Eli Zaretskii
2012-06-27 17:24 ` Eli Zaretskii
2012-06-27 17:59 ` Dmitry Antipov
2012-06-27 19:36 ` Eli Zaretskii
2012-07-01 15:05 ` Dmitry Antipov [this message]
2012-07-01 15:42 ` Andreas Schwab
2012-06-28 12:51 ` Dmitry Antipov
2012-06-27 7:06 ` 'struct window' cleanup #2 martin rudalics
2012-06-27 16:59 ` Eli Zaretskii
2012-06-25 16:39 ` Eli Zaretskii
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