Allow touch if some pointers are MT_TOOL_PALM
We would cancel all touch when we recevied MT_TOOL_PALM because it
becomes accidental touch, and that would break user gesture when
another non-palm pointer is still active.
- Send ACTION_POINTER_UP with AKEY_EVENT_FLAG_CANCELED when recevie
MT_TOOL_PALM if at least 2 pointers are active.
- Send ACTION_CANEL when receive MT_TOOL_PALM if only one pointer.
- Add test caseis for touch cancel scenarios, to test it would keep
dispatching non-palm event.
Test: atest inputflinger_tests
Bug: 137221719
Change-Id: Ife35a692c71e45159bfcc771317dff47fa764dda
Merged-In: Ife35a692c71e45159bfcc771317dff47fa764dda
diff --git a/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp b/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp
index 43bd9f1..0440f49 100644
--- a/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp
@@ -236,6 +236,20 @@
mMultiTouchMotionAccumulator.process(rawEvent);
}
+std::optional<int32_t> MultiTouchInputMapper::getActiveBitId(
+ const MultiTouchMotionAccumulator::Slot& inSlot) {
+ if (mHavePointerIds) {
+ int32_t trackingId = inSlot.getTrackingId();
+ for (BitSet32 idBits(mPointerIdBits); !idBits.isEmpty();) {
+ int32_t n = idBits.clearFirstMarkedBit();
+ if (mPointerTrackingIdMap[n] == trackingId) {
+ return std::make_optional(n);
+ }
+ }
+ }
+ return std::nullopt;
+}
+
void MultiTouchInputMapper::syncTouch(nsecs_t when, RawState* outState) {
size_t inCount = mMultiTouchMotionAccumulator.getSlotCount();
size_t outCount = 0;
@@ -250,10 +264,9 @@
}
if (inSlot->getToolType() == AMOTION_EVENT_TOOL_TYPE_PALM) {
- if (!mCurrentMotionAborted) {
- ALOGI("Canceling touch gesture from device %s because the palm event was detected",
- getDeviceName().c_str());
- cancelTouch(when);
+ std::optional<int32_t> id = getActiveBitId(*inSlot);
+ if (id) {
+ outState->rawPointerData.canceledIdBits.markBit(id.value());
}
continue;
}
diff --git a/services/inputflinger/reader/mapper/MultiTouchInputMapper.h b/services/inputflinger/reader/mapper/MultiTouchInputMapper.h
index 190282f..ea6f207 100644
--- a/services/inputflinger/reader/mapper/MultiTouchInputMapper.h
+++ b/services/inputflinger/reader/mapper/MultiTouchInputMapper.h
@@ -103,6 +103,8 @@
bool hasStylus() const override;
private:
+ // If the slot is in use, return the bit id. Return std::nullopt otherwise.
+ std::optional<int32_t> getActiveBitId(const MultiTouchMotionAccumulator::Slot& inSlot);
MultiTouchMotionAccumulator mMultiTouchMotionAccumulator;
// Specifies the pointer id bits that are in use, and their associated tracking id.
diff --git a/services/inputflinger/reader/mapper/TouchInputMapper.cpp b/services/inputflinger/reader/mapper/TouchInputMapper.cpp
index 5545f1c..c5ebf04 100644
--- a/services/inputflinger/reader/mapper/TouchInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/TouchInputMapper.cpp
@@ -104,6 +104,7 @@
pointerCount = other.pointerCount;
hoveringIdBits = other.hoveringIdBits;
touchingIdBits = other.touchingIdBits;
+ canceledIdBits = other.canceledIdBits;
for (uint32_t i = 0; i < pointerCount; i++) {
pointers[i] = other.pointers[i];
@@ -140,6 +141,7 @@
pointerCount = 0;
hoveringIdBits.clear();
touchingIdBits.clear();
+ canceledIdBits.clear();
}
void CookedPointerData::copyFrom(const CookedPointerData& other) {
@@ -1444,10 +1446,11 @@
#if DEBUG_RAW_EVENTS
ALOGD("syncTouch: pointerCount %d -> %d, touching ids 0x%08x -> 0x%08x, "
- "hovering ids 0x%08x -> 0x%08x",
+ "hovering ids 0x%08x -> 0x%08x, canceled ids 0x%08x",
last->rawPointerData.pointerCount, next->rawPointerData.pointerCount,
last->rawPointerData.touchingIdBits.value, next->rawPointerData.touchingIdBits.value,
- last->rawPointerData.hoveringIdBits.value, next->rawPointerData.hoveringIdBits.value);
+ last->rawPointerData.hoveringIdBits.value, next->rawPointerData.hoveringIdBits.value,
+ next->rawPointerData.canceledIdBits.value);
#endif
processRawTouches(false /*timeout*/);
@@ -1892,14 +1895,15 @@
// Dispatch pointer up events.
while (!upIdBits.isEmpty()) {
uint32_t upId = upIdBits.clearFirstMarkedBit();
-
- dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_POINTER_UP, 0, 0,
- metaState, buttonState, 0,
+ bool isCanceled = mCurrentCookedState.cookedPointerData.canceledIdBits.hasBit(upId);
+ dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_POINTER_UP, 0,
+ isCanceled ? AMOTION_EVENT_FLAG_CANCELED : 0, metaState, buttonState, 0,
mLastCookedState.cookedPointerData.pointerProperties,
mLastCookedState.cookedPointerData.pointerCoords,
mLastCookedState.cookedPointerData.idToIndex, dispatchedIdBits, upId,
mOrientedXPrecision, mOrientedYPrecision, mDownTime);
dispatchedIdBits.clearBit(upId);
+ mCurrentCookedState.cookedPointerData.canceledIdBits.clearBit(upId);
}
// Dispatch move events if any of the remaining pointers moved from their old locations.
@@ -2025,6 +2029,8 @@
mCurrentRawState.rawPointerData.hoveringIdBits;
mCurrentCookedState.cookedPointerData.touchingIdBits =
mCurrentRawState.rawPointerData.touchingIdBits;
+ mCurrentCookedState.cookedPointerData.canceledIdBits =
+ mCurrentRawState.rawPointerData.canceledIdBits;
if (mCurrentCookedState.cookedPointerData.pointerCount == 0) {
mCurrentCookedState.buttonState = 0;
@@ -3563,7 +3569,11 @@
if (action == AMOTION_EVENT_ACTION_POINTER_DOWN) {
action = AMOTION_EVENT_ACTION_DOWN;
} else if (action == AMOTION_EVENT_ACTION_POINTER_UP) {
- action = AMOTION_EVENT_ACTION_UP;
+ if ((flags & AMOTION_EVENT_FLAG_CANCELED) != 0) {
+ action = AMOTION_EVENT_ACTION_CANCEL;
+ } else {
+ action = AMOTION_EVENT_ACTION_UP;
+ }
} else {
// Can't happen.
ALOG_ASSERT(false);
diff --git a/services/inputflinger/reader/mapper/TouchInputMapper.h b/services/inputflinger/reader/mapper/TouchInputMapper.h
index d437e01..94486a6 100644
--- a/services/inputflinger/reader/mapper/TouchInputMapper.h
+++ b/services/inputflinger/reader/mapper/TouchInputMapper.h
@@ -71,7 +71,7 @@
uint32_t pointerCount;
Pointer pointers[MAX_POINTERS];
- BitSet32 hoveringIdBits, touchingIdBits;
+ BitSet32 hoveringIdBits, touchingIdBits, canceledIdBits;
uint32_t idToIndex[MAX_POINTER_ID + 1];
RawPointerData();
@@ -90,6 +90,7 @@
inline void clearIdBits() {
hoveringIdBits.clear();
touchingIdBits.clear();
+ canceledIdBits.clear();
}
inline const Pointer& pointerForId(uint32_t id) const { return pointers[idToIndex[id]]; }
@@ -102,7 +103,7 @@
uint32_t pointerCount;
PointerProperties pointerProperties[MAX_POINTERS];
PointerCoords pointerCoords[MAX_POINTERS];
- BitSet32 hoveringIdBits, touchingIdBits;
+ BitSet32 hoveringIdBits, touchingIdBits, canceledIdBits;
uint32_t idToIndex[MAX_POINTER_ID + 1];
CookedPointerData();