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Simplify handling of frame parameters

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* src/frame.c (x_set_frame_parameters): Avoid extra loop processing
foreground color, background color and font parameters.  Adjust
comments.
This commit is contained in:
Dmitry Antipov 2016-06-30 09:21:07 +03:00
parent 4bd3503991
commit 3aeb7c35ed
1 changed files with 32 additions and 49 deletions
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81
src/frame.c
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@ -3110,70 +3110,58 @@ x_set_frame_parameters (struct frame *f, Lisp_Object alist)
/* Record in these vectors all the parms specified. */
Lisp_Object *parms;
Lisp_Object *values;
ptrdiff_t i, p;
ptrdiff_t i, j, size;
bool left_no_change = 0, top_no_change = 0;
#ifdef HAVE_X_WINDOWS
bool icon_left_no_change = 0, icon_top_no_change = 0;
#endif
i = 0;
for (tail = alist; CONSP (tail); tail = XCDR (tail))
i++;
for (size = 0, tail = alist; CONSP (tail); tail = XCDR (tail))
size++;
USE_SAFE_ALLOCA;
SAFE_ALLOCA_LISP (parms, 2 * i);
values = parms + i;
SAFE_ALLOCA_LISP (parms, 2 * size);
values = parms + size;
/* Extract parm names and values into those vectors. */
i = 0;
i = 0, j = size - 1;
for (tail = alist; CONSP (tail); tail = XCDR (tail))
{
Lisp_Object elt;
Lisp_Object elt = XCAR (tail), prop = Fcar (elt), val = Fcdr (elt);
elt = XCAR (tail);
parms[i] = Fcar (elt);
values[i] = Fcdr (elt);
i++;
/* Some properties are independent of other properties, but other
properties are dependent upon them. These special properties
are foreground_color, background_color (affects cursor_color)
and font (affects fringe widths); they're recorded starting
from the end of PARMS and VALUES to process them first by using
reverse iteration. */
if (EQ (prop, Qforeground_color)
|| EQ (prop, Qbackground_color)
|| EQ (prop, Qfont))
{
parms[j] = prop;
values[j] = val;
j--;
}
else
{
parms[i] = prop;
values[i] = val;
i++;
}
}
/* TAIL and ALIST are not used again below here. */
alist = tail = Qnil;
top = left = Qunbound;
icon_left = icon_top = Qunbound;
/* Process foreground_color and background_color before anything else.
They are independent of other properties, but other properties (e.g.,
cursor_color) are dependent upon them. */
/* Process default font as well, since fringe widths depends on it. */
for (p = 0; p < i; p++)
{
Lisp_Object prop, val;
prop = parms[p];
val = values[p];
if (EQ (prop, Qforeground_color)
|| EQ (prop, Qbackground_color)
|| EQ (prop, Qfont))
{
register Lisp_Object param_index, old_value;
old_value = get_frame_param (f, prop);
if (NILP (Fequal (val, old_value)))
{
store_frame_param (f, prop, val);
param_index = Fget (prop, Qx_frame_parameter);
if (NATNUMP (param_index)
&& XFASTINT (param_index) < ARRAYELTS (frame_parms)
&& FRAME_RIF (f)->frame_parm_handlers[XINT (param_index)])
(*(FRAME_RIF (f)->frame_parm_handlers[XINT (param_index)])) (f, val, old_value);
}
}
}
/* Now process them in reverse of specified order. */
while (i-- != 0)
/* Reverse order is used to make sure that special
properties noticed above are processed first. */
for (i = size - 1; i >= 0; i--)
{
Lisp_Object prop, val;
@ -3221,11 +3209,6 @@ x_set_frame_parameters (struct frame *f, Lisp_Object alist)
fullscreen = val;
fullscreen_change = true;
}
else if (EQ (prop, Qforeground_color)
|| EQ (prop, Qbackground_color)
|| EQ (prop, Qfont))
/* Processed above. */
continue;
else
{
register Lisp_Object param_index, old_value;