[PATCH libinput 1/3] touchpad: Enlarge topbutton area a bit while the touchpad is disabled

[Hans de Goede]

Make it easier to hit the topbutton area when the touchpad is disabled,
normally we don't want to make the topbutton area too big, so as to not
interfere with normal touchpad operation, but when disabled we have no such
worries.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 src/evdev-mt-touchpad-buttons.c | 19 ++++++++++++-------
 src/evdev-mt-touchpad.c         |  4 ++++
 src/evdev-mt-touchpad.h         |  4 +++-
 3 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/src/evdev-mt-touchpad-buttons.c b/src/evdev-mt-touchpad-buttons.c
index 865346b..f0800d7 100644
--- a/src/evdev-mt-touchpad-buttons.c
+++ b/src/evdev-mt-touchpad-buttons.c
@@ -496,7 +496,8 @@ tp_release_all_buttons(struct tp_dispatch *tp,
 
 void
 tp_init_softbuttons(struct tp_dispatch *tp,
-		    struct evdev_device *device)
+		    struct evdev_device *device,
+		    double topbutton_size_mult)
 {
 	int width, height;
 	const struct input_absinfo *absinfo_x, *absinfo_y;
@@ -524,14 +525,18 @@ tp_init_softbuttons(struct tp_dispatch *tp,
 	tp->buttons.bottom_area.rightbutton_left_edge = width/2 + xoffset;
 
 	if (tp->buttons.has_topbuttons) {
-		/* T440s has the top button line 5mm from the top,
-		   event analysis has shown events to start down to ~10mm
-		   from the top - which maps to 15% */
+		/* T440s has the top button line 5mm from the top, event
+		   analysis has shown events to start down to ~10mm from the
+		   top - which maps to 15%.  We allow the caller to enlarge the
+		   area using a multiplier for the touchpad disabled case. */
+		double topsize_mm = 10 * topbutton_size_mult;
+		double topsize_pct = .15 * topbutton_size_mult;
+
 		if (yres > 1) {
 			tp->buttons.top_area.bottom_edge =
-			yoffset + 10 * yres;
+			yoffset + topsize_mm * yres;
 		} else {
-			tp->buttons.top_area.bottom_edge = height * .15 + yoffset;
+			tp->buttons.top_area.bottom_edge = height * topsize_pct + yoffset;
 		}
 		tp->buttons.top_area.rightbutton_left_edge = width * .58 + xoffset;
 		tp->buttons.top_area.leftbutton_right_edge = width * .42 + xoffset;
@@ -581,7 +586,7 @@ tp_init_buttons(struct tp_dispatch *tp,
 		tp->buttons.use_clickfinger = true;
 
 	if (tp->buttons.is_clickpad && !tp->buttons.use_clickfinger) {
-		tp_init_softbuttons(tp, device);
+		tp_init_softbuttons(tp, device, 1.0);
 	} else {
 		tp->buttons.bottom_area.top_edge = INT_MAX;
 		tp->buttons.top_area.bottom_edge = INT_MIN;
diff --git a/src/evdev-mt-touchpad.c b/src/evdev-mt-touchpad.c
index 9e568ad..1c32cc6 100644
--- a/src/evdev-mt-touchpad.c
+++ b/src/evdev-mt-touchpad.c
@@ -645,6 +645,8 @@ tp_suspend(struct tp_dispatch *tp, struct evdev_device *device)
 	 */
 	if (tp->buttons.has_topbuttons) {
 		evdev_notify_suspended_device(device);
+		/* Enlarge topbutton area while suspended */
+		tp_init_softbuttons(tp, device, 1.5);
 	} else {
 		evdev_device_suspend(device);
 	}
@@ -656,6 +658,8 @@ tp_resume(struct tp_dispatch *tp, struct evdev_device *device)
 	if (tp->buttons.has_topbuttons) {
 		/* tap state-machine is offline while suspended, reset state */
 		tp_clear_state(tp, device);
+		/* restore original topbutton area size */
+		tp_init_softbuttons(tp, device, 1.0);
 		evdev_notify_resumed_device(device);
 	} else {
 		evdev_device_resume(device);
diff --git a/src/evdev-mt-touchpad.h b/src/evdev-mt-touchpad.h
index 15cca76..e0c8c47 100644
--- a/src/evdev-mt-touchpad.h
+++ b/src/evdev-mt-touchpad.h
@@ -245,7 +245,9 @@ int
 tp_init_buttons(struct tp_dispatch *tp, struct evdev_device *device);
 
 void
-tp_init_softbuttons(struct tp_dispatch *tp, struct evdev_device *device);
+tp_init_softbuttons(struct tp_dispatch *tp,
+		    struct evdev_device *device,
+		    double topbutton_size_mult);
 
 void
 tp_destroy_buttons(struct tp_dispatch *tp);
-- 
2.1.0