[PATCH libinput 4/4] touchpad: on non-resolution touchpads, use 30% as maximum clickfinger spread

[Peter Hutterer]

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
 src/evdev-mt-touchpad-buttons.c | 35 +++++++++++++++++++++++------------
 test/touchpad.c                 |  2 +-
 2 files changed, 24 insertions(+), 13 deletions(-)

diff --git a/src/evdev-mt-touchpad-buttons.c b/src/evdev-mt-touchpad-buttons.c
index 469f0fa..5786ea8 100644
--- a/src/evdev-mt-touchpad-buttons.c
+++ b/src/evdev-mt-touchpad-buttons.c
@@ -789,27 +789,38 @@ tp_check_clickfinger_distance(struct tp_dispatch *tp,
 			      struct tp_touch *t1,
 			      struct tp_touch *t2)
 {
-	int res_x, res_y;
 	double x, y;
 
 	if (!t1 || !t2)
 		return 0;
 
+	x = abs(t1->point.x - t2->point.x);
+	y = abs(t1->point.y - t2->point.y);
+
 	/* no resolution, so let's assume they're close enough together */
-	if (tp->device->abs.fake_resolution)
-		return 1;
+	if (tp->device->abs.fake_resolution) {
+		int w, h;
 
-	res_x = tp->device->abs.absinfo_x->resolution;
-	res_y = tp->device->abs.absinfo_y->resolution;
+		/* Use a maximum of 30% of the touchpad width or height if
+		 * we dont' have resolution. */
+		w = tp->device->abs.absinfo_x->maximum -
+		    tp->device->abs.absinfo_x->minimum;
+		h = tp->device->abs.absinfo_y->maximum -
+		    tp->device->abs.absinfo_y->minimum;
 
-	x = abs(t1->point.x - t2->point.x)/res_x;
-	y = abs(t1->point.y - t2->point.y)/res_y;
+		return (x < w * 0.3 && y < h * 0.3) ? 1 : 0;
+	} else {
+		/* maximum spread is 40mm horiz, 20mm vert. Anything wider than that
+		 * is probably a gesture. The y spread is small so we ignore clicks
+		 * with thumbs at the bottom of the touchpad while the pointer
+		 * moving finger is still on the pad */
+
+		x /= tp->device->abs.absinfo_x->resolution;
+		y /= tp->device->abs.absinfo_y->resolution;
+
+		return (x < 40 && y < 20) ? 1 : 0;
+	}
 
-	/* maximum spread is 40mm horiz, 20mm vert. Anything wider than that
-	 * is probably a gesture. The y spread is small so we ignore clicks
-	 * with thumbs at the bottom of the touchpad while the pointer
-	 * moving finger is still on the pad */
-	return (x < 40 && y < 20) ? 1 : 0;
 }
 
 static uint32_t
diff --git a/test/touchpad.c b/test/touchpad.c
index d9daf43..692698c 100644
--- a/test/touchpad.c
+++ b/test/touchpad.c
@@ -5129,7 +5129,7 @@ litest_setup_tests(void)
 	litest_add("touchpad:clickfinger", touchpad_1fg_clickfinger, LITEST_CLICKPAD, LITEST_ANY);
 	litest_add("touchpad:clickfinger", touchpad_1fg_clickfinger_no_touch, LITEST_CLICKPAD, LITEST_ANY);
 	litest_add("touchpad:clickfinger", touchpad_2fg_clickfinger, LITEST_CLICKPAD, LITEST_ANY);
-	litest_add("touchpad:clickfinger", touchpad_2fg_clickfinger_distance, LITEST_CLICKPAD, LITEST_APPLE_CLICKPAD);
+	litest_add("touchpad:clickfinger", touchpad_2fg_clickfinger_distance, LITEST_CLICKPAD, LITEST_ANY);
 	litest_add("touchpad:clickfinger", touchpad_clickfinger_to_area_method, LITEST_CLICKPAD, LITEST_ANY);
 	litest_add("touchpad:clickfinger",
 		   touchpad_clickfinger_to_area_method_while_down, LITEST_CLICKPAD, LITEST_ANY);
-- 
2.4.1