0002-Reduce-edge-exclusion-zone-for-Apple-touchpads.patc

0002-Reduce-edge-exclusion-zone-for-Apple-touchpads.patc

From ff46248d082b7851ef74db385d115dd7d07bbb0b Mon Sep 17 00:00:00 2001
From: "Peter Y. Chuang" <peteryuchuang@gmail.com>
Date: Mon, 14 Aug 2017 08:53:42 +0200
Subject: [PATCH libinput 2/2] Reduce edge exclusion zone for Apple touchpads

---
 src/evdev-mt-touchpad.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/src/evdev-mt-touchpad.c b/src/evdev-mt-touchpad.c
index 80e74efd..ce6ac659 100644
--- a/src/evdev-mt-touchpad.c
+++ b/src/evdev-mt-touchpad.c
@@ -2456,18 +2456,30 @@ tp_init_palmdetect_edge(struct tp_dispatch *tp,
 	if (width < 70.0)
 		return;
 
-	/* palm edges are 8% of the width on each side */
-	mm.x = width * 0.08;
+	/* palm edges are 8% of the width on each side.
+	   In case of Apple's touchpads, which has touch-size-based 
+	   palm detection, the edge is hard-coded at 3 mm. */
+	if (device->model_flags & EVDEV_MODEL_APPLE_TOUCHPAD)
+		mm.x = 3;
+	else
+		mm.x = width * 0.08;
 	edges = evdev_device_mm_to_units(device, &mm);
 	tp->palm.left_edge = edges.x;
 
-	mm.x = width * 0.92;
+	if (device->model_flags & EVDEV_MODEL_APPLE_TOUCHPAD)
+		mm.x = width -3;
+	else
+		mm.x = width * 0.92;
 	edges = evdev_device_mm_to_units(device, &mm);
 	tp->palm.right_edge = edges.x;
 
 	if (!tp->buttons.has_topbuttons) {
-		/* top edge is 5% of the height */
-		mm.y = height * 0.05;
+		/* top edge is 5% of the height, except in the case of 
+		   Apple touchpads. */
+		if (device->model_flags & EVDEV_MODEL_APPLE_TOUCHPAD)
+			mm.y = 3;
+		else
+			mm.y = height * 0.05;
 		edges = evdev_device_mm_to_units(device, &mm);
 		tp->palm.upper_edge = edges.y;
 	}
-- 
2.14.1