[PATCH libinput 10/19] touchpad: add support for multi-finger tapping
Peter Hutterer
peter.hutterer at who-t.net
Sun Feb 16 22:48:29 PST 2014
Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
doc/touchpad-tap-state-machine.svg | 771 +++++++++++++++++++++++++++++++++++++
src/Makefile.am | 1 +
src/evdev-mt-touchpad-tap.c | 586 ++++++++++++++++++++++++++++
src/evdev-mt-touchpad.c | 4 +
src/evdev-mt-touchpad.h | 33 ++
5 files changed, 1395 insertions(+)
create mode 100644 doc/touchpad-tap-state-machine.svg
create mode 100644 src/evdev-mt-touchpad-tap.c
diff --git a/doc/touchpad-tap-state-machine.svg b/doc/touchpad-tap-state-machine.svg
new file mode 100644
index 0000000..50ebc71
--- /dev/null
+++ b/doc/touchpad-tap-state-machine.svg
@@ -0,0 +1,771 @@
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+L 1063 1968 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10"
+pointer-events="none"/><path d="M 651 1153 L 105 1184" fill="none" stroke="#000000"
+stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="none"/><path d="M 100 1184 L
+107 1180 L 105 1184 L 107 1187 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10"
+pointer-events="none"/><path d="M 428 1347 L 105 1210" fill="none" stroke="#000000"
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+108 1208 L 105 1210 L 105 1214 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10"
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+pointer-events="none"/><rect x="251" y="1622" width="130" height="40" rx="2" ry="2"
+fill="#ccffcc" stroke="#000000" stroke-width="2" pointer-events="none"/><g
+text-anchor="middle" font-size="12px"><text x="316" y="1646" fill="#000000"
+font-family="Helvetica">DRAGGING_WAIT</text></g><path d="M 382 1727 C 385 1724 389 1722
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+stroke-miterlimit="10" pointer-events="none"/><g text-anchor="middle"
+font-size="12px"><text x="410" y="1756" fill="#000000"
+font-family="Helvetica">timeout</text></g><path d="M 328 1532 L 316 1616" fill="none"
+stroke="#000000" stroke-miterlimit="10" pointer-events="none"/><path d="M 316 1621 L 313
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+fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="none"/></g></svg>
diff --git a/src/Makefile.am b/src/Makefile.am
index f6d0335..0e74a97 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -12,6 +12,7 @@ libinput_la_SOURCES = \
evdev.h \
evdev-mt-touchpad.c \
evdev-mt-touchpad.h \
+ evdev-mt-touchpad-tap.c \
evdev-touchpad.c \
filter.c \
filter.h \
diff --git a/src/evdev-mt-touchpad-tap.c b/src/evdev-mt-touchpad-tap.c
new file mode 100644
index 0000000..7ac592b
--- /dev/null
+++ b/src/evdev-mt-touchpad-tap.c
@@ -0,0 +1,586 @@
+/*
+ * Copyright © 2013 Red Hat, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without
+ * fee, provided that the above copyright notice appear in all copies
+ * and that both that copyright notice and this permission notice
+ * appear in supporting documentation, and that the name of Red Hat
+ * not be used in advertising or publicity pertaining to distribution
+ * of the software without specific, written prior permission. Red
+ * Hat makes no representations about the suitability of this software
+ * for any purpose. It is provided "as is" without express or implied
+ * warranty.
+ *
+ * THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
+ * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+ * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/timerfd.h>
+
+#include "evdev-mt-touchpad.h"
+
+#define CASE_RETURN_STRING(a) case a: return #a;
+
+#define DEFAULT_TAP_TIMEOUT_PERIOD 180
+#define DEFAULT_TAP_MOVE_THRESHOLD 30
+
+enum tap_event {
+ TAP_EVENT_TOUCH = 12,
+ TAP_EVENT_MOTION,
+ TAP_EVENT_RELEASE,
+ TAP_EVENT_BUTTON,
+ TAP_EVENT_TIMEOUT,
+};
+
+/*****************************************
+ * DO NOT EDIT THIS FILE!
+ *
+ * Look at the state diagram in doc/touchpad-tap-state-machine.svg, or
+ * online at
+ * https://drive.google.com/file/d/0B1NwWmji69noYTdMcU1kTUZuUVE/edit?usp=sharing
+ * (it's a http://draw.io diagram)
+ *
+ * Any changes in this file must be represented in the diagram.
+ */
+
+static inline const char*
+tap_state_to_str(enum tp_tap_state state) {
+
+ switch(state) {
+ CASE_RETURN_STRING(TAP_STATE_IDLE);
+ CASE_RETURN_STRING(TAP_STATE_HOLD);
+ CASE_RETURN_STRING(TAP_STATE_TOUCH);
+ CASE_RETURN_STRING(TAP_STATE_TAPPED);
+ CASE_RETURN_STRING(TAP_STATE_TOUCH_2);
+ CASE_RETURN_STRING(TAP_STATE_TOUCH_2_HOLD);
+ CASE_RETURN_STRING(TAP_STATE_TOUCH_3);
+ CASE_RETURN_STRING(TAP_STATE_TOUCH_3_HOLD);
+ CASE_RETURN_STRING(TAP_STATE_DRAGGING);
+ CASE_RETURN_STRING(TAP_STATE_DRAGGING_WAIT);
+ CASE_RETURN_STRING(TAP_STATE_DRAGGING_OR_DOUBLETAP);
+ CASE_RETURN_STRING(TAP_STATE_DRAGGING_2);
+ CASE_RETURN_STRING(TAP_STATE_DEAD);
+ }
+ return NULL;
+}
+
+static inline const char*
+tap_event_to_str(enum tap_event event) {
+
+ switch(event) {
+ CASE_RETURN_STRING(TAP_EVENT_TOUCH);
+ CASE_RETURN_STRING(TAP_EVENT_MOTION);
+ CASE_RETURN_STRING(TAP_EVENT_RELEASE);
+ CASE_RETURN_STRING(TAP_EVENT_TIMEOUT);
+ CASE_RETURN_STRING(TAP_EVENT_BUTTON);
+ }
+ return NULL;
+}
+#undef CASE_RETURN_STRING
+
+static void
+tp_tap_notify(struct tp_dispatch *tp,
+ uint32_t time,
+ int nfingers,
+ enum libinput_pointer_button_state state)
+{
+ int32_t button;
+
+ switch (nfingers) {
+ case 1: button = BTN_LEFT; break;
+ case 2: button = BTN_RIGHT; break;
+ case 3: button = BTN_MIDDLE; break;
+ default:
+ return;
+ }
+
+ pointer_notify_button(&tp->device->base,
+ time,
+ button,
+ state);
+}
+
+static void
+tp_tap_set_timer(struct tp_dispatch *tp, uint32_t time)
+{
+ uint32_t timeout = time + DEFAULT_TAP_TIMEOUT_PERIOD;
+ struct itimerspec its;
+
+ its.it_interval.tv_sec = 0;
+ its.it_interval.tv_nsec = 0;
+ its.it_value.tv_sec = timeout / 1000;
+ its.it_value.tv_nsec = (timeout % 1000) * 1000 * 1000;
+ timerfd_settime(tp->tap.timer_fd, TFD_TIMER_ABSTIME, &its, NULL);
+
+ tp->tap.timeout = timeout;
+}
+
+static void
+tp_tap_clear_timer(struct tp_dispatch *tp)
+{
+ tp->tap.timeout = 0;
+}
+
+static void
+tp_tap_idle_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+
+ switch (event) {
+ case TAP_EVENT_TOUCH:
+ tp->tap.state = TAP_STATE_TOUCH;
+ tp_tap_set_timer(tp, time);
+ break;
+ case TAP_EVENT_RELEASE:
+ case TAP_EVENT_MOTION:
+ log_info("invalid event, no fingers are down\n");
+ break;
+ case TAP_EVENT_TIMEOUT:
+ break;
+ case TAP_EVENT_BUTTON:
+ tp->tap.state = TAP_STATE_DEAD;
+ break;
+ }
+}
+
+static void
+tp_tap_touch_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+
+ switch (event) {
+ case TAP_EVENT_TOUCH:
+ tp->tap.state = TAP_STATE_TOUCH_2;
+ tp_tap_set_timer(tp, time);
+ break;
+ case TAP_EVENT_RELEASE:
+ tp->tap.state = TAP_STATE_TAPPED;
+ tp_tap_notify(tp, time, 1, LIBINPUT_POINTER_BUTTON_STATE_PRESSED);
+ tp_tap_set_timer(tp, time);
+ break;
+ case TAP_EVENT_TIMEOUT:
+ case TAP_EVENT_MOTION:
+ tp->tap.state = TAP_STATE_HOLD;
+ tp_tap_clear_timer(tp);
+ break;
+ case TAP_EVENT_BUTTON:
+ tp->tap.state = TAP_STATE_DEAD;
+ break;
+ }
+}
+
+static void
+tp_tap_hold_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+
+ switch (event) {
+ case TAP_EVENT_TOUCH:
+ tp->tap.state = TAP_STATE_TOUCH_2;
+ tp_tap_set_timer(tp, time);
+ break;
+ case TAP_EVENT_RELEASE:
+ tp->tap.state = TAP_STATE_IDLE;
+ break;
+ case TAP_EVENT_MOTION:
+ case TAP_EVENT_TIMEOUT:
+ break;
+ case TAP_EVENT_BUTTON:
+ tp->tap.state = TAP_STATE_DEAD;
+ break;
+ }
+}
+
+static void
+tp_tap_tapped_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+
+ switch (event) {
+ case TAP_EVENT_MOTION:
+ case TAP_EVENT_RELEASE:
+ log_info("invalid event when fingers are up\n");
+ break;
+ case TAP_EVENT_TOUCH:
+ tp->tap.state = TAP_STATE_DRAGGING_OR_DOUBLETAP;
+ tp_tap_clear_timer(tp);
+ break;
+ case TAP_EVENT_TIMEOUT:
+ tp->tap.state = TAP_STATE_IDLE;
+ tp_tap_notify(tp, time, 1, LIBINPUT_POINTER_BUTTON_STATE_RELEASED);
+ break;
+ case TAP_EVENT_BUTTON:
+ tp->tap.state = TAP_STATE_DEAD;
+ tp_tap_notify(tp, time, 1, LIBINPUT_POINTER_BUTTON_STATE_RELEASED);
+ break;
+ }
+}
+
+static void
+tp_tap_touch2_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+
+ switch (event) {
+ case TAP_EVENT_TOUCH:
+ tp->tap.state = TAP_STATE_TOUCH_3;
+ tp_tap_set_timer(tp, time);
+ break;
+ case TAP_EVENT_RELEASE:
+ tp->tap.state = TAP_STATE_HOLD;
+ tp_tap_notify(tp, time, 2, LIBINPUT_POINTER_BUTTON_STATE_PRESSED);
+ tp_tap_notify(tp, time, 2, LIBINPUT_POINTER_BUTTON_STATE_RELEASED);
+ tp_tap_clear_timer(tp);
+ break;
+ case TAP_EVENT_MOTION:
+ tp_tap_clear_timer(tp);
+ case TAP_EVENT_TIMEOUT:
+ tp->tap.state = TAP_STATE_TOUCH_2_HOLD;
+ break;
+ case TAP_EVENT_BUTTON:
+ tp->tap.state = TAP_STATE_DEAD;
+ break;
+ }
+}
+
+static void
+tp_tap_touch2_hold_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+
+ switch (event) {
+ case TAP_EVENT_TOUCH:
+ tp->tap.state = TAP_STATE_TOUCH_3;
+ tp_tap_set_timer(tp, time);
+ break;
+ case TAP_EVENT_RELEASE:
+ tp->tap.state = TAP_STATE_HOLD;
+ break;
+ case TAP_EVENT_MOTION:
+ case TAP_EVENT_TIMEOUT:
+ tp->tap.state = TAP_STATE_TOUCH_2_HOLD;
+ break;
+ case TAP_EVENT_BUTTON:
+ tp->tap.state = TAP_STATE_DEAD;
+ break;
+ }
+}
+
+static void
+tp_tap_touch3_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+
+ switch (event) {
+ case TAP_EVENT_TOUCH:
+ tp->tap.state = TAP_STATE_DEAD;
+ tp_tap_clear_timer(tp);
+ break;
+ case TAP_EVENT_MOTION:
+ case TAP_EVENT_TIMEOUT:
+ tp->tap.state = TAP_STATE_TOUCH_3_HOLD;
+ tp_tap_clear_timer(tp);
+ break;
+ case TAP_EVENT_RELEASE:
+ tp->tap.state = TAP_STATE_TOUCH_2_HOLD;
+ tp_tap_notify(tp, time, 3, LIBINPUT_POINTER_BUTTON_STATE_PRESSED);
+ tp_tap_notify(tp, time, 3, LIBINPUT_POINTER_BUTTON_STATE_RELEASED);
+ break;
+ case TAP_EVENT_BUTTON:
+ tp->tap.state = TAP_STATE_DEAD;
+ break;
+ }
+}
+
+static void
+tp_tap_touch3_hold_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+
+ switch (event) {
+ case TAP_EVENT_TOUCH:
+ tp->tap.state = TAP_STATE_DEAD;
+ tp_tap_set_timer(tp, time);
+ break;
+ case TAP_EVENT_RELEASE:
+ tp->tap.state = TAP_STATE_TOUCH_2_HOLD;
+ break;
+ case TAP_EVENT_MOTION:
+ case TAP_EVENT_TIMEOUT:
+ break;
+ case TAP_EVENT_BUTTON:
+ tp->tap.state = TAP_STATE_DEAD;
+ break;
+ }
+}
+
+static void
+tp_tap_dragging_or_doubletap_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+ switch (event) {
+ case TAP_EVENT_TOUCH:
+ tp->tap.state = TAP_STATE_DRAGGING_2;
+ break;
+ case TAP_EVENT_RELEASE:
+ tp->tap.state = TAP_STATE_IDLE;
+ tp_tap_notify(tp, time, 1, LIBINPUT_POINTER_BUTTON_STATE_RELEASED);
+ tp_tap_notify(tp, time, 1, LIBINPUT_POINTER_BUTTON_STATE_PRESSED);
+ tp_tap_notify(tp, time, 1, LIBINPUT_POINTER_BUTTON_STATE_RELEASED);
+ tp_tap_clear_timer(tp);
+ break;
+ case TAP_EVENT_MOTION:
+ case TAP_EVENT_TIMEOUT:
+ tp->tap.state = TAP_STATE_DRAGGING;
+ break;
+ case TAP_EVENT_BUTTON:
+ tp->tap.state = TAP_STATE_DEAD;
+ tp_tap_notify(tp, time, 1, LIBINPUT_POINTER_BUTTON_STATE_RELEASED);
+ break;
+ }
+}
+
+static void
+tp_tap_dragging_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+
+ switch (event) {
+ case TAP_EVENT_TOUCH:
+ tp->tap.state = TAP_STATE_DRAGGING_2;
+ break;
+ case TAP_EVENT_RELEASE:
+ tp->tap.state = TAP_STATE_DRAGGING_WAIT;
+ tp_tap_set_timer(tp, time);
+ break;
+ case TAP_EVENT_MOTION:
+ case TAP_EVENT_TIMEOUT:
+ /* noop */
+ break;
+ case TAP_EVENT_BUTTON:
+ tp->tap.state = TAP_STATE_DEAD;
+ tp_tap_notify(tp, time, 1, LIBINPUT_POINTER_BUTTON_STATE_RELEASED);
+ break;
+ }
+}
+
+static void
+tp_tap_dragging_wait_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+
+ switch (event) {
+ case TAP_EVENT_TOUCH:
+ tp->tap.state = TAP_STATE_DRAGGING;
+ tp_tap_clear_timer(tp);
+ break;
+ case TAP_EVENT_RELEASE:
+ case TAP_EVENT_MOTION:
+ break;
+ case TAP_EVENT_TIMEOUT:
+ tp->tap.state = TAP_STATE_IDLE;
+ tp_tap_notify(tp, time, 1, LIBINPUT_POINTER_BUTTON_STATE_RELEASED);
+ break;
+ case TAP_EVENT_BUTTON:
+ tp->tap.state = TAP_STATE_DEAD;
+ tp_tap_notify(tp, time, 1, LIBINPUT_POINTER_BUTTON_STATE_RELEASED);
+ break;
+ }
+}
+
+static void
+tp_tap_dragging2_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+
+ switch (event) {
+ case TAP_EVENT_RELEASE:
+ tp->tap.state = TAP_STATE_DRAGGING;
+ break;
+ case TAP_EVENT_TOUCH:
+ tp->tap.state = TAP_STATE_DEAD;
+ tp_tap_notify(tp, time, 1, LIBINPUT_POINTER_BUTTON_STATE_RELEASED);
+ break;
+ case TAP_EVENT_MOTION:
+ case TAP_EVENT_TIMEOUT:
+ /* noop */
+ break;
+ case TAP_EVENT_BUTTON:
+ tp->tap.state = TAP_STATE_DEAD;
+ tp_tap_notify(tp, time, 1, LIBINPUT_POINTER_BUTTON_STATE_RELEASED);
+ break;
+ }
+}
+
+static void
+tp_tap_dead_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+
+ switch (event) {
+ case TAP_EVENT_RELEASE:
+ if (tp->nfingers_down == 0)
+ tp->tap.state = TAP_STATE_IDLE;
+ break;
+ case TAP_EVENT_TOUCH:
+ case TAP_EVENT_MOTION:
+ case TAP_EVENT_TIMEOUT:
+ case TAP_EVENT_BUTTON:
+ break;
+ }
+}
+
+static void
+tp_tap_handle_event(struct tp_dispatch *tp, enum tap_event event, uint32_t time)
+{
+ enum tp_tap_state current;
+ if (!tp->tap.enabled)
+ return;
+
+ current = tp->tap.state;
+
+ switch(tp->tap.state) {
+ case TAP_STATE_IDLE:
+ tp_tap_idle_handle_event(tp, event, time);
+ break;
+ case TAP_STATE_TOUCH:
+ tp_tap_touch_handle_event(tp, event, time);
+ break;
+ case TAP_STATE_HOLD:
+ tp_tap_hold_handle_event(tp, event, time);
+ break;
+ case TAP_STATE_TAPPED:
+ tp_tap_tapped_handle_event(tp, event, time);
+ break;
+ case TAP_STATE_TOUCH_2:
+ tp_tap_touch2_handle_event(tp, event, time);
+ break;
+ case TAP_STATE_TOUCH_2_HOLD:
+ tp_tap_touch2_hold_handle_event(tp, event, time);
+ break;
+ case TAP_STATE_TOUCH_3:
+ tp_tap_touch3_handle_event(tp, event, time);
+ break;
+ case TAP_STATE_TOUCH_3_HOLD:
+ tp_tap_touch3_hold_handle_event(tp, event, time);
+ break;
+ case TAP_STATE_DRAGGING_OR_DOUBLETAP:
+ tp_tap_dragging_or_doubletap_handle_event(tp, event, time);
+ break;
+ case TAP_STATE_DRAGGING:
+ tp_tap_dragging_handle_event(tp, event, time);
+ break;
+ case TAP_STATE_DRAGGING_WAIT:
+ tp_tap_dragging_wait_handle_event(tp, event, time);
+ break;
+ case TAP_STATE_DRAGGING_2:
+ tp_tap_dragging2_handle_event(tp, event, time);
+ break;
+ case TAP_STATE_DEAD:
+ tp_tap_dead_handle_event(tp, event, time);
+ break;
+ }
+
+ if (tp->tap.state == TAP_STATE_IDLE || tp->tap.state == TAP_STATE_DEAD)
+ tp_tap_clear_timer(tp);
+
+ log_debug("%s → %s → %s\n", tap_state_to_str(current), tap_event_to_str(event), tap_state_to_str(tp->tap.state));
+}
+
+static bool
+tp_tap_exceeds_motion_threshold(struct tp_dispatch *tp, struct tp_touch *t)
+{
+ int threshold = DEFAULT_TAP_MOVE_THRESHOLD;
+ double dx, dy;
+
+ tp_get_delta(t, &dx, &dy);
+
+ return dx * dx + dy * dy > threshold * threshold;
+}
+
+int
+tp_tap_handle_state(struct tp_dispatch *tp, uint32_t time)
+{
+ struct tp_touch *t;
+
+ if (tp->queued & TOUCHPAD_EVENT_BUTTON_PRESS)
+ tp_tap_handle_event(tp, TAP_EVENT_BUTTON, time);
+
+ tp_for_each_touch(tp, t) {
+ if (!t->dirty || t->state == TOUCH_NONE)
+ continue;
+
+ if (t->state == TOUCH_BEGIN)
+ tp_tap_handle_event(tp, TAP_EVENT_TOUCH, time);
+ else if (t->state == TOUCH_END)
+ tp_tap_handle_event(tp, TAP_EVENT_RELEASE, time);
+ else if (tp->tap.state != TAP_STATE_IDLE &&
+ tp_tap_exceeds_motion_threshold(tp, t))
+ tp_tap_handle_event(tp, TAP_EVENT_MOTION, time);
+ }
+
+ return 0;
+}
+
+static void
+tp_tap_timeout_handler(void *data)
+{
+ struct tp_dispatch *touchpad = data;
+ uint64_t expires;
+ int len;
+ struct timespec ts;
+ uint32_t now;
+
+ len = read(touchpad->tap.timer_fd, &expires, sizeof expires);
+ if (len != sizeof expires)
+ /* This will only happen if the application made the fd
+ * non-blocking, but this function should only be called
+ * upon the timeout, so lets continue anyway. */
+ fprintf(stderr, "timerfd read error: %m\n");
+
+ clock_gettime(CLOCK_MONOTONIC, &ts);
+ now = ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
+
+ tp_tap_handle_timeout(touchpad, now);
+}
+
+unsigned int
+tp_tap_handle_timeout(struct tp_dispatch *tp, uint32_t time)
+{
+ if (!tp->tap.enabled)
+ return 0;
+
+ if (tp->tap.timeout && tp->tap.timeout <= time) {
+ tp_tap_clear_timer(tp);
+ tp_tap_handle_event(tp, TAP_EVENT_TIMEOUT, time);
+ }
+
+ return tp->tap.timeout;
+}
+
+int
+tp_init_tap(struct tp_dispatch *tp)
+{
+ tp->tap.state = TAP_STATE_IDLE;
+ tp->tap.timer_fd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC);
+
+ if (tp->tap.timer_fd == -1)
+ return -1;
+
+ tp->tap.source =
+ libinput_add_fd(tp->device->base.seat->libinput,
+ tp->tap.timer_fd,
+ tp_tap_timeout_handler,
+ tp);
+
+ if (tp->tap.source == NULL) {
+ close(tp->tap.timer_fd);
+ return -1;
+ }
+
+ tp->tap.enabled = 1; /* FIXME */
+
+ return 0;
+}
diff --git a/src/evdev-mt-touchpad.c b/src/evdev-mt-touchpad.c
index 73ea8a8..d1268f6 100644
--- a/src/evdev-mt-touchpad.c
+++ b/src/evdev-mt-touchpad.c
@@ -369,6 +369,7 @@ tp_post_events(struct tp_dispatch *tp, uint32_t time)
return;
}
+ tp_tap_handle_state(tp, time);
if (t->history.count < 4)
return;
@@ -487,6 +488,9 @@ tp_init(struct tp_dispatch *tp,
if (tp_init_accel(tp, diagonal) != 0)
return -1;
+ if (tp_init_tap(tp) != 0)
+ return -1;
+
return 0;
}
diff --git a/src/evdev-mt-touchpad.h b/src/evdev-mt-touchpad.h
index 907aec8..973b478 100644
--- a/src/evdev-mt-touchpad.h
+++ b/src/evdev-mt-touchpad.h
@@ -45,6 +45,22 @@ enum touch_state {
TOUCH_END
};
+enum tp_tap_state {
+ TAP_STATE_IDLE = 4,
+ TAP_STATE_TOUCH,
+ TAP_STATE_HOLD,
+ TAP_STATE_TAPPED,
+ TAP_STATE_TOUCH_2,
+ TAP_STATE_TOUCH_2_HOLD,
+ TAP_STATE_TOUCH_3,
+ TAP_STATE_TOUCH_3_HOLD,
+ TAP_STATE_DRAGGING_OR_DOUBLETAP,
+ TAP_STATE_DRAGGING,
+ TAP_STATE_DRAGGING_WAIT,
+ TAP_STATE_DRAGGING_2,
+ TAP_STATE_DEAD, /**< finger count exceeded */
+};
+
struct tp_motion {
int32_t x;
int32_t y;
@@ -97,6 +113,14 @@ struct tp_dispatch {
} buttons; /* physical buttons */
enum touchpad_event queued;
+
+ struct {
+ bool enabled;
+ int timer_fd;
+ struct libinput_source *source;
+ unsigned int timeout;
+ enum tp_tap_state state;
+ } tap;
};
#define tp_for_each_touch(_tp, _t) \
@@ -105,4 +129,13 @@ struct tp_dispatch {
void
tp_get_delta(struct tp_touch *t, double *dx, double *dy);
+int
+tp_tap_handle_state(struct tp_dispatch *tp, uint32_t time);
+
+unsigned int
+tp_tap_handle_timeout(struct tp_dispatch *tp, uint32_t time);
+
+int
+tp_init_tap(struct tp_dispatch *tp);
+
#endif
--
1.8.4.2
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