[PATCH] randr: Make the RRConstrainCursorHarder logic the same as miPointerSetPosition
Rui Matos
tiagomatos at gmail.com
Mon Aug 22 10:28:12 PDT 2011
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 at gmail.com>
---
v2: no code changes, just a (hopefully) better and clearer commit message.
randr/rrcrtc.c | 29 ++++++++++-------------------
1 files changed, 10 insertions(+), 19 deletions(-)
diff --git a/randr/rrcrtc.c b/randr/rrcrtc.c
index dcff70b..12d879b 100644
--- a/randr/rrcrtc.c
+++ b/randr/rrcrtc.c
@@ -1463,7 +1463,7 @@ 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;
}
@@ -1479,24 +1479,15 @@ 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;
}
--
1.7.6
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