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barriers: Reindent the constrainment hook

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Signed-off-by: Jasper St. Pierre <jstpierre@mecheye.net>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Jasper St. Pierre 2012-12-09 22:48:18 -05:00 committed by Peter Hutterer
parent 97da74c80e
commit 85a37ddcc2
1 changed files with 28 additions and 27 deletions
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55
Xi/xibarriers.c
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@ -311,43 +311,44 @@ input_constrain_cursor(DeviceIntPtr dev, ScreenPtr screen,
BarrierScreenPtr cs = GetBarrierScreen(screen);
int x = dest_x,
y = dest_y;
int dir;
int i;
struct PointerBarrier *nearest = NULL;
PointerBarrierClientPtr c;
if (!xorg_list_is_empty(&cs->barriers) && !IsFloating(dev)) {
int dir;
int i;
struct PointerBarrier *nearest = NULL;
PointerBarrierClientPtr c;
if (xorg_list_is_empty(&cs->barriers) || IsFloating(dev))
goto out;
/* How this works:
* Given the origin and the movement vector, get the nearest barrier
* to the origin that is blocking the movement.
* Clamp to that barrier.
* Then, check from the clamped intersection to the original
* destination, again finding the nearest barrier and clamping.
*/
dir = barrier_get_direction(current_x, current_y, x, y);
/* How this works:
* Given the origin and the movement vector, get the nearest barrier
* to the origin that is blocking the movement.
* Clamp to that barrier.
* Then, check from the clamped intersection to the original
* destination, again finding the nearest barrier and clamping.
*/
dir = barrier_get_direction(current_x, current_y, x, y);
#define MAX_BARRIERS 2
for (i = 0; i < MAX_BARRIERS; i++) {
c = barrier_find_nearest(cs, dev, dir, current_x, current_y, x, y);
if (!c)
break;
for (i = 0; i < MAX_BARRIERS; i++) {
c = barrier_find_nearest(cs, dev, dir, current_x, current_y, x, y);
if (!c)
break;
nearest = &c->barrier;
nearest = &c->barrier;
barrier_clamp_to_barrier(nearest, dir, &x, &y);
barrier_clamp_to_barrier(nearest, dir, &x, &y);
if (barrier_is_vertical(nearest)) {
dir &= ~(BarrierNegativeX | BarrierPositiveX);
current_x = x;
}
else if (barrier_is_horizontal(nearest)) {
dir &= ~(BarrierNegativeY | BarrierPositiveY);
current_y = y;
}
if (barrier_is_vertical(nearest)) {
dir &= ~(BarrierNegativeX | BarrierPositiveX);
current_x = x;
}
else if (barrier_is_horizontal(nearest)) {
dir &= ~(BarrierNegativeY | BarrierPositiveY);
current_y = y;
}
}
out:
*out_x = x;
*out_y = y;
}