[PATCH libinput v3 13/17] touchpad: softbuttons: Deal with a click arriving before any touches
Hans de Goede
hdegoede at redhat.com
Tue May 20 07:35:01 PDT 2014
It is possible for a click to get reported before any related touch events
get reported, here is the relevant part of an evemu-record session on a T440s:
E: 3.985585 0000 0000 0000 # ------------ SYN_REPORT (0) ----------
E: 3.997419 0003 0039 -001 # EV_ABS / ABS_MT_TRACKING_ID -1
E: 3.997419 0001 014a 0000 # EV_KEY / BTN_TOUCH 0
E: 3.997419 0003 0018 0000 # EV_ABS / ABS_PRESSURE 0
E: 3.997419 0001 0145 0000 # EV_KEY / BTN_TOOL_FINGER 0
E: 3.997419 0000 0000 0000 # ------------ SYN_REPORT (0) ----------
E: 5.117881 0001 0110 0001 # EV_KEY / BTN_LEFT 1
E: 5.117881 0000 0000 0000 # ------------ SYN_REPORT (0) ----------
E: 5.133422 0003 0039 0187 # EV_ABS / ABS_MT_TRACKING_ID 187
E: 5.133422 0003 0035 3098 # EV_ABS / ABS_MT_POSITION_X 3098
E: 5.133422 0003 0036 3282 # EV_ABS / ABS_MT_POSITION_Y 3282
E: 5.133422 0003 003a 0046 # EV_ABS / ABS_MT_PRESSURE 46
E: 5.133422 0001 014a 0001 # EV_KEY / BTN_TOUCH 1
E: 5.133422 0003 0000 3102 # EV_ABS / ABS_X 3102
E: 5.133422 0003 0001 3282 # EV_ABS / ABS_Y 3282
E: 5.133422 0003 0018 0046 # EV_ABS / ABS_PRESSURE 46
E: 5.133422 0001 0145 0001 # EV_KEY / BTN_TOOL_FINGER 1
E: 5.133422 0000 0000 0000 # ------------ SYN_REPORT (0) ----------
Notice the BTN_LEFT event all by itself!
To deal with this if a physical click registers before we get any touches,
wait for the first touch to resolve the click.
Also see the new activity diagram for the tp_post_softbutton_buttons
method which has been added to doc/touchpad-softbutton-state-machine.svg
Signed-off-by: Hans de Goede <hdegoede at redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer at who-t.net>
---
doc/touchpad-softbutton-state-machine.svg | 423 ++++++++++++++++++++++--------
src/evdev-mt-touchpad-buttons.c | 57 ++--
src/evdev-mt-touchpad.h | 1 +
3 files changed, 358 insertions(+), 123 deletions(-)
diff --git a/doc/touchpad-softbutton-state-machine.svg b/doc/touchpad-softbutton-state-machine.svg
index 1838e35..1142343 100644
--- a/doc/touchpad-softbutton-state-machine.svg
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+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="296" y="788">
finger in</text>
-<text x="254" y="713">
+<text x="296" y="802">
bottom</text>
-<text x="254" y="727">
+<text x="296" y="816">
button == curr</text>
</g>
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+<path d="M 361 765 L 349 799" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="none"/>
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+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1183" y="489">
+Check state of</text>
+<text x="1183" y="503">
+all touches</text>
+</g>
+<path d="M 1183 512 L 1183 520 Q 1183 529 1183 536 L 1183 544" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1178 536 L 1183 545 L 1187 536" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
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+<rect x="1133" y="17" width="100" height="40" fill="none" stroke="none" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1183" y="41">
+tp_post_softbutton_buttons()</text>
+</g>
+<path d="M 1183 212 L 1278 267 L 1183 322 L 1088 267 Z" fill="#ffffc0" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1183" y="264">
+!buttons.click_pend</text>
+<text x="1183" y="278">
+&& current == old</text>
+</g>
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+<path d="M 1418 271 L 1427 267 L 1418 262" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" font-size="11px">
+<rect fill="#ffffff" stroke="none" x="1368" y="247" width="24" height="18" stroke-width="0"/>
+<text x="1368" y="261">
+yes</text>
+</g>
+<path d="M 1183 322 L 1183 332 Q 1183 342 1183 351 L 1183 360" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1178 352 L 1183 361 L 1187 352" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" font-size="11px">
+<rect fill="#ffffff" stroke="none" x="1184" y="329" width="18" height="18" stroke-width="0"/>
+<text x="1185" y="339">
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+</g>
+<ellipse cx="1443" cy="267" rx="11" ry="11" fill="#000000" stroke="#ff0000" pointer-events="none"/>
+<ellipse cx="1443" cy="267" rx="15" ry="15" fill="transparent" stroke="#ff0000" pointer-events="none"/>
+<rect x="1078" y="112" width="200" height="60" rx="24" ry="24" fill="#ffffc0" stroke="#ff0000" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1178" y="132">
+current = buttons.state & 0x01</text>
+<text x="1178" y="146">
+old = buttons.old_state & 0x01</text>
+<text x="1178" y="160">
+button = 0</text>
+</g>
+<path d="M 1183 172 L 1183 182 Q 1183 192 1183 201 L 1183 210" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1178 202 L 1183 211 L 1187 202" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
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+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1183" y="621">
+All touches are in state none</text>
+</g>
+<path d="M 1183 688 L 1183 696 Q 1183 703 1183 709 L 1183 716" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1178 708 L 1183 717 L 1187 708" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" font-size="11px">
+<rect fill="#ffffff" stroke="none" x="1184" y="685" width="18" height="18" stroke-width="0"/>
+<text x="1185" y="698">
+no</text>
+</g>
+<path d="M 1298 617 L 1308 617 Q 1318 617 1327 617 L 1335 617" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1328 622 L 1337 617 L 1328 613" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" font-size="11px">
+<rect fill="#ffffff" stroke="none" x="1299" y="625" width="24" height="18" stroke-width="0"/>
+<text x="1300" y="634">
+yes</text>
+</g>
+<rect x="1338" y="597" width="150" height="40" rx="16" ry="16" fill="#ffffc0" stroke="#ff0000" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1413" y="621">
+buttons.click_pend = 1</text>
+</g>
+<path d="M 1488 617 L 1498 617 Q 1508 617 1517 617 L 1525 617" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1518 622 L 1527 617 L 1518 613" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1183 718 L 1298 789 L 1183 860 L 1068 789 Z" fill="#ffffc0" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1183" y="793">
+(Some touches are in right) &&</text>
+<text x="1183" y="807">
+(Some touches are in left)</text>
+</g>
+<path d="M 1298 789 L 1308 789 Q 1318 789 1327 789 L 1335 789" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1328 794 L 1337 789 L 1328 785" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" font-size="11px">
+<rect fill="#ffffff" stroke="none" x="1301" y="797" width="24" height="18" stroke-width="0"/>
+<text x="1302" y="806">
+yes</text>
+</g>
+<rect x="1338" y="769" width="160" height="40" rx="16" ry="16" fill="#ffffc0" stroke="#ff0000" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1418" y="793">
+button = BTN_MIDDLE</text>
+</g>
+<path d="M 1498 789 L 1528 789 Q 1538 789 1538 799 L 1538 1207 Q 1538 1217 1528 1217 L 1282 1217" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1290 1212 L 1281 1217 L 1290 1221" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1183 362 L 1245 396 L 1183 431 L 1120 396 Z" fill="#ffffc0" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1183" y="400">
+current</text>
+</g>
+<path d="M 1120 396 L 971 396 Q 961 396 961 406 L 961 1172 Q 961 1182 961 1182 L 961 1182" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 965 1180 L 961 1182 L 965 1184" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" font-size="11px">
+<rect fill="#ffffff" stroke="none" x="1057" y="377" width="18" height="18" stroke-width="0"/>
+<text x="1058" y="390">
+no</text>
+</g>
+<path d="M 1183 431 L 1183 441 Q 1183 451 1183 460 L 1183 470" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1178 462 L 1183 471 L 1187 462" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" font-size="11px">
+<rect fill="#ffffff" stroke="none" x="1184" y="438" width="24" height="18" stroke-width="0"/>
+<text x="1185" y="448">
+yes</text>
+</g>
+<path d="M 1183 902 L 1279 967 L 1183 1032 L 1086 967 Z" fill="#ffffc0" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1183" y="971">
+Some touches are in right</text>
+</g>
+<path d="M 1279 967 L 1298 967 Q 1308 967 1318 967 L 1335 967" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1328 971 L 1337 967 L 1328 962" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" font-size="11px">
+<rect fill="#ffffff" stroke="none" x="1309" y="984" width="24" height="18" stroke-width="0"/>
+<text x="1310" y="994">
+yes</text>
+</g>
+<path d="M 1183 860 L 1183 871 Q 1183 881 1183 890 L 1183 900" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1178 892 L 1183 901 L 1187 892" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" font-size="11px">
+<rect fill="#ffffff" stroke="none" x="1184" y="863" width="18" height="18" stroke-width="0"/>
+<text x="1185" y="877">
+no</text>
+</g>
+<rect x="1338" y="947" width="160" height="40" rx="16" ry="16" fill="#ffffc0" stroke="#ff0000" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1418" y="971">
+button = BTN_RIGHT</text>
+</g>
+<rect x="1103" y="1082" width="160" height="40" rx="16" ry="16" fill="#ffffc0" stroke="#ff0000" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1183" y="1106">
+button = BTN_LEFT</text>
+</g>
+<path d="M 1183 1032 L 1183 1047 Q 1183 1057 1183 1067 L 1183 1080" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1178 1072 L 1183 1081 L 1187 1072" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" font-size="11px">
+<rect fill="#ffffff" stroke="none" x="1184" y="1039" width="18" height="18" stroke-width="0"/>
+<text x="1185" y="1053">
+no</text>
+</g>
+<rect x="1085" y="1182" width="195" height="70" rx="28" ry="28" fill="#ffffc0" stroke="#ff0000" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1183" y="1214">
+buttons.active = button</text>
+<text x="1183" y="1228">
+state = BUTTON_PRESSED</text>
+</g>
+<path d="M 1183 1252 L 1183 1282 Q 1183 1292 1173 1292 L 1083 1292 Q 1073 1292 1073 1302 L 1073 1330" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1068 1322 L 1073 1331 L 1077 1322" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1183 1122 L 1183 1142 Q 1183 1152 1183 1162 L 1183 1180" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1178 1172 L 1183 1181 L 1187 1172" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1498 967 L 1528 967 Q 1538 967 1538 977 L 1538 1207 Q 1538 1217 1528 1217 L 1282 1217" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1290 1212 L 1281 1217 L 1290 1221" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<rect x="863" y="1182" width="195" height="70" rx="28" ry="28" fill="#ffffc0" stroke="#ff0000" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="960" y="1207">
+button = buttons.active</text>
+<text x="960" y="1221">
+buttons.active = 0</text>
+<text x="960" y="1235">
+state = BUTTON_RELEASED</text>
+</g>
+<rect x="998" y="1332" width="150" height="40" rx="16" ry="16" fill="#ffffc0" stroke="#ff0000" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1073" y="1356">
+buttons.click_pend = 0</text>
+</g>
+<path d="M 1073 1372 L 1073 1379 Q 1073 1387 1073 1393 L 1073 1400" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1068 1392 L 1073 1401 L 1077 1392" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 960 1252 L 960 1282 Q 960 1292 970 1292 L 1063 1292 Q 1073 1292 1073 1302 L 1073 1330" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1068 1322 L 1073 1331 L 1077 1322" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1073 1402 L 1113 1422 L 1073 1442 L 1033 1422 Z" fill="#ffffc0" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1073" y="1426">
+button</text>
+</g>
+<path d="M 1113 1422 L 1178 1422 Q 1188 1422 1188 1432 L 1188 1597 Q 1188 1607 1178 1607 L 1090 1607" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1098 1602 L 1089 1607 L 1098 1611" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" font-size="11px">
+<rect fill="#ffffff" stroke="none" x="1114" y="1402" width="18" height="18" stroke-width="0"/>
+<text x="1115" y="1416">
+no</text>
+</g>
+<path d="M 1073 1442 L 1073 1452 Q 1073 1462 1073 1471 L 1073 1480" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1068 1472 L 1073 1481 L 1077 1472" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" font-size="11px">
+<rect fill="#ffffff" stroke="none" x="1074" y="1449" width="24" height="18" stroke-width="0"/>
+<text x="1075" y="1459">
+yes</text>
+</g>
+<rect x="988" y="1482" width="170" height="40" rx="16" ry="16" fill="#ffffc0" stroke="#ff0000" pointer-events="none"/>
+<g fill="#000000" font-family="Helvetica" text-anchor="middle" font-size="12px">
+<text x="1073" y="1499">
+pointer_notify_button(</text>
+<text x="1073" y="1513">
+button, state)</text>
+</g>
+<path d="M 1073 1522 L 1073 1542 Q 1073 1552 1073 1562 L 1073 1590" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<path d="M 1068 1582 L 1073 1591 L 1077 1582" fill="none" stroke="#ff0000" stroke-miterlimit="10" pointer-events="none"/>
+<ellipse cx="1073" cy="1607" rx="11" ry="11" fill="#000000" stroke="#ff0000" pointer-events="none"/>
+<ellipse cx="1073" cy="1607" rx="15" ry="15" fill="transparent" stroke="#ff0000" pointer-events="none"/>
+<ellipse cx="1543" cy="617" rx="11" ry="11" fill="#000000" stroke="#ff0000" pointer-events="none"/>
+<ellipse cx="1543" cy="617" rx="15" ry="15" fill="transparent" stroke="#ff0000" pointer-events="none"/>
</g>
</svg>
diff --git a/src/evdev-mt-touchpad-buttons.c b/src/evdev-mt-touchpad-buttons.c
index 3206ccb..c35d14a 100644
--- a/src/evdev-mt-touchpad-buttons.c
+++ b/src/evdev-mt-touchpad-buttons.c
@@ -544,51 +544,68 @@ tp_post_softbutton_buttons(struct tp_dispatch *tp, uint32_t time)
{
uint32_t current, old, button;
enum libinput_pointer_button_state state;
+ enum { AREA = 0x01, LEFT = 0x02, RIGHT = 0x04 };
current = tp->buttons.state;
old = tp->buttons.old_state;
+ button = 0;
- if (current == old)
- return 0;
-
- if (tp->nfingers_down == 0 || tp->nfingers_down > 2)
+ if (!tp->buttons.click_pending && current == old)
return 0;
if (current) {
struct tp_touch *t;
- button = 0;
tp_for_each_touch(tp, t) {
- if (t->button.curr == BUTTON_EVENT_IN_BOTTOM_R)
- button |= 0x2;
- else if (t->button.curr == BUTTON_EVENT_IN_BOTTOM_L)
- button |= 0x1;
+ switch (t->button.curr) {
+ case BUTTON_EVENT_IN_AREA:
+ button |= AREA;
+ break;
+ case BUTTON_EVENT_IN_BOTTOM_L:
+ button |= LEFT;
+ break;
+ case BUTTON_EVENT_IN_BOTTOM_R:
+ button |= RIGHT;
+ break;
+ default:
+ break;
+ }
}
switch (button) {
- case 0: /* only in area */
- case 1: /* only left area */
- button = BTN_LEFT;
- break;
- case 2: /* only right area */
+ case 0:
+ /* No touches, wait for a touch before processing */
+ tp->buttons.click_pending = true;
+ return 0;
+ case RIGHT:
+ case RIGHT | AREA:
+ /* Some touches in right, no touches in left */
button = BTN_RIGHT;
break;
- case 3: /* left + right area */
+ case LEFT | RIGHT:
+ case LEFT | RIGHT | AREA:
+ /* Some touches in left and some in right */
button = BTN_MIDDLE;
break;
+ default:
+ button = BTN_LEFT;
}
tp->buttons.active = button;
state = LIBINPUT_POINTER_BUTTON_STATE_PRESSED;
} else {
- state = LIBINPUT_POINTER_BUTTON_STATE_RELEASED;
button = tp->buttons.active;
+ tp->buttons.active = 0;
+ state = LIBINPUT_POINTER_BUTTON_STATE_RELEASED;
}
- pointer_notify_button(&tp->device->base,
- time,
- button,
- state);
+ tp->buttons.click_pending = false;
+
+ if (button)
+ pointer_notify_button(&tp->device->base,
+ time,
+ button,
+ state);
return 1;
}
diff --git a/src/evdev-mt-touchpad.h b/src/evdev-mt-touchpad.h
index 78a74df..41f9daf 100644
--- a/src/evdev-mt-touchpad.h
+++ b/src/evdev-mt-touchpad.h
@@ -156,6 +156,7 @@ struct tp_dispatch {
struct {
bool is_clickpad; /* true for clickpads */
bool use_clickfinger; /* number of fingers decides button number */
+ bool click_pending;
uint32_t state;
uint32_t old_state;
uint32_t motion_dist; /* for pinned touches */
--
1.9.0
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