Log dispatch state when addPointers hits unexpected state
Propagate errors from TouchedWindow's addTouchingPointers to the
InputDispatcher, so that we can look at the event history. Currently,
this condition is not getting triggered in the dispatcher tests, but it
seems achievable in the libgui_test, according to the logs.
Once we figure out the failure mode, we can remove this error reporting
to simplify the code.
Bug: 331747627
Test: TEST=inputflinger_tests; m $TEST && $ANDROID_HOST_OUT/nativetest64/$TEST/$TEST
Change-Id: I668b2db8c3d20b7af81ad89e85608783db631309
diff --git a/services/inputflinger/dispatcher/TouchedWindow.cpp b/services/inputflinger/dispatcher/TouchedWindow.cpp
index 037d7c8..1f86f66 100644
--- a/services/inputflinger/dispatcher/TouchedWindow.cpp
+++ b/services/inputflinger/dispatcher/TouchedWindow.cpp
@@ -20,6 +20,7 @@
#include <android-base/stringprintf.h>
#include <input/PrintTools.h>
+using android::base::Result;
using android::base::StringPrintf;
namespace android {
@@ -89,8 +90,8 @@
hoveringPointers.push_back(pointer);
}
-void TouchedWindow::addTouchingPointers(DeviceId deviceId,
- const std::vector<PointerProperties>& pointers) {
+Result<void> TouchedWindow::addTouchingPointers(DeviceId deviceId,
+ const std::vector<PointerProperties>& pointers) {
std::vector<PointerProperties>& touchingPointers = mDeviceStates[deviceId].touchingPointers;
const size_t initialSize = touchingPointers.size();
for (const PointerProperties& pointer : pointers) {
@@ -98,11 +99,14 @@
return properties.id == pointer.id;
});
}
- if (touchingPointers.size() != initialSize) {
+ const bool foundInconsistentState = touchingPointers.size() != initialSize;
+ touchingPointers.insert(touchingPointers.end(), pointers.begin(), pointers.end());
+ if (foundInconsistentState) {
LOG(ERROR) << __func__ << ": " << dumpVector(pointers, streamableToString) << ", device "
<< deviceId << " already in " << *this;
+ return android::base::Error();
}
- touchingPointers.insert(touchingPointers.end(), pointers.begin(), pointers.end());
+ return {};
}
bool TouchedWindow::hasTouchingPointers() const {