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randr: Make the RRConstrainCursorHarder logic the same as miPointerSetPosition

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The constraining logic in RRConstrainCursorHarder allows the cursor to reach
crtc positions of x = width and y = height while the constraining code in
miPointerSetPosition only allows it to reach x = width - 1 and y = height - 1
for the analogous screen case.

This patch makes the former's logic equivalent to the latter's which allows
applications to benefit from Fitts's law. E.g. a maximized application
adjacent to a crtc border wouldn't get pointer events if the user moved the
pointer all the way until it's contained.

Signed-off-by: Rui Matos <tiagomatos@gmail.com>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Rui Matos 2011-11-01 21:32:36 +00:00 committed by Keith Packard
parent 548c6fe044
commit 9cc44b955b
1 changed files with 10 additions and 19 deletions
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29
randr/rrcrtc.c
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@ -1459,7 +1459,7 @@ RRConstrainCursorHarder(DeviceIntPtr pDev, ScreenPtr pScreen, int mode, int *x,
crtc_bounds(crtc, &left, &right, &top, &bottom);
if ((*x >= left) && (*x <= right) && (*y >= top) && (*y <= bottom))
if ((*x >= left) && (*x < right) && (*y >= top) && (*y < bottom))
return;
}
@ -1475,24 +1475,15 @@ RRConstrainCursorHarder(DeviceIntPtr pDev, ScreenPtr pScreen, int mode, int *x,
crtc_bounds(crtc, &left, &right, &top, &bottom);
miPointerGetPosition(pDev, &nx, &ny);
if ((nx >= left) && (nx <= right) && (ny >= top) && (ny <= bottom)) {
if ((*x <= left) || (*x >= right)) {
int dx = *x - nx;
if (dx > 0)
*x = right;
else if (dx < 0)
*x = left;
}
if ((*y <= top) || (*y >= bottom)) {
int dy = *y - ny;
if (dy > 0)
*y = bottom;
else if (dy < 0)
*y = top;
}
if ((nx >= left) && (nx < right) && (ny >= top) && (ny < bottom)) {
if (*x < left)
*x = left;
if (*x >= right)
*x = right - 1;
if (*y < top)
*y = top;
if (*y >= bottom)
*y = bottom - 1;
return;
}