InputReader: Add API to get the last used input device
This will be used by the InputMethodManagerService to notify the IME of
the last input device type that was used to interact with Android when
the IME is shown. This API eliminates the need for IMMS to add another
global spy window to solve this problem.
Bug: 336615195
Test: atest inputflinger_tests
Change-Id: If594bd07bfd0a3cb542fc300854f1dd5717aeab2
diff --git a/services/inputflinger/reader/InputReader.cpp b/services/inputflinger/reader/InputReader.cpp
index 12f52b8..69555f8 100644
--- a/services/inputflinger/reader/InputReader.cpp
+++ b/services/inputflinger/reader/InputReader.cpp
@@ -38,6 +38,8 @@
namespace android {
+namespace {
+
/**
* Determines if the identifiers passed are a sub-devices. Sub-devices are physical devices
* that expose multiple input device paths such a keyboard that also has a touchpad input.
@@ -49,8 +51,8 @@
* inputs versus the same device plugged into multiple ports.
*/
-static bool isSubDevice(const InputDeviceIdentifier& identifier1,
- const InputDeviceIdentifier& identifier2) {
+bool isSubDevice(const InputDeviceIdentifier& identifier1,
+ const InputDeviceIdentifier& identifier2) {
return (identifier1.vendor == identifier2.vendor &&
identifier1.product == identifier2.product && identifier1.bus == identifier2.bus &&
identifier1.version == identifier2.version &&
@@ -58,7 +60,7 @@
identifier1.location == identifier2.location);
}
-static bool isStylusPointerGestureStart(const NotifyMotionArgs& motionArgs) {
+bool isStylusPointerGestureStart(const NotifyMotionArgs& motionArgs) {
const auto actionMasked = MotionEvent::getActionMasked(motionArgs.action);
if (actionMasked != AMOTION_EVENT_ACTION_HOVER_ENTER &&
actionMasked != AMOTION_EVENT_ACTION_DOWN &&
@@ -69,6 +71,28 @@
return isStylusToolType(motionArgs.pointerProperties[actionIndex].toolType);
}
+bool isNewGestureStart(const NotifyMotionArgs& motion) {
+ return motion.action == AMOTION_EVENT_ACTION_DOWN ||
+ motion.action == AMOTION_EVENT_ACTION_HOVER_ENTER;
+}
+
+bool isNewGestureStart(const NotifyKeyArgs& key) {
+ return key.action == AKEY_EVENT_ACTION_DOWN;
+}
+
+// Return the event's device ID if it marks the start of a new gesture.
+std::optional<DeviceId> getDeviceIdOfNewGesture(const NotifyArgs& args) {
+ if (const auto* motion = std::get_if<NotifyMotionArgs>(&args); motion != nullptr) {
+ return isNewGestureStart(*motion) ? std::make_optional(motion->deviceId) : std::nullopt;
+ }
+ if (const auto* key = std::get_if<NotifyKeyArgs>(&args); key != nullptr) {
+ return isNewGestureStart(*key) ? std::make_optional(key->deviceId) : std::nullopt;
+ }
+ return std::nullopt;
+}
+
+} // namespace
+
// --- InputReader ---
InputReader::InputReader(std::shared_ptr<EventHubInterface> eventHub,
@@ -162,6 +186,11 @@
}
std::swap(notifyArgs, mPendingArgs);
+
+ // Keep track of the last used device
+ for (const NotifyArgs& args : notifyArgs) {
+ mLastUsedDeviceId = getDeviceIdOfNewGesture(args).value_or(mLastUsedDeviceId);
+ }
} // release lock
// Flush queued events out to the listener.
@@ -883,6 +912,11 @@
mEventHub->sysfsNodeChanged(sysfsNodePath);
}
+DeviceId InputReader::getLastUsedInputDeviceId() {
+ std::scoped_lock _l(mLock);
+ return mLastUsedDeviceId;
+}
+
void InputReader::dump(std::string& dump) {
std::scoped_lock _l(mLock);