Added the ability to read external batteries
Extended InputDevice and EventHub with capabilites to detect and read
external battery status and capacity. This allows devices such as
wireless gamepads to provide battery information to applications.
Bug: 161633432
Test: atest InputDeviceBatteryTest
Change-Id: I3c65166a1f0b055c5b85bad286afd5beb60bb303
Merged-In: I3c65166a1f0b055c5b85bad286afd5beb60bb303
diff --git a/services/inputflinger/reader/mapper/BatteryInputMapper.cpp b/services/inputflinger/reader/mapper/BatteryInputMapper.cpp
new file mode 100644
index 0000000..afdc5ab
--- /dev/null
+++ b/services/inputflinger/reader/mapper/BatteryInputMapper.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "../Macros.h"
+
+#include "BatteryInputMapper.h"
+
+namespace android {
+
+BatteryInputMapper::BatteryInputMapper(InputDeviceContext& deviceContext)
+ : InputMapper(deviceContext) {}
+
+uint32_t BatteryInputMapper::getSources() {
+ return 0;
+}
+
+void BatteryInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+ InputMapper::populateDeviceInfo(info);
+
+ info->setHasBattery(true);
+}
+
+void BatteryInputMapper::process(const RawEvent* rawEvent) {}
+
+std::optional<int32_t> BatteryInputMapper::getBatteryCapacity() {
+ return getDeviceContext().getBatteryCapacity();
+}
+
+std::optional<int32_t> BatteryInputMapper::getBatteryStatus() {
+ return getDeviceContext().getBatteryStatus();
+}
+
+void BatteryInputMapper::dump(std::string& dump) {
+ dump += INDENT2 "Battery Input Mapper:\n";
+ dump += getBatteryCapacity().has_value()
+ ? StringPrintf(INDENT3 "Capacity: %d\n", getBatteryCapacity().value())
+ : StringPrintf(INDENT3 "Capacity: Unknown");
+
+ std::string status;
+ switch (getBatteryStatus().value_or(BATTERY_STATUS_UNKNOWN)) {
+ case BATTERY_STATUS_CHARGING:
+ status = "Charging";
+ break;
+ case BATTERY_STATUS_DISCHARGING:
+ status = "Discharging";
+ break;
+ case BATTERY_STATUS_NOT_CHARGING:
+ status = "Not charging";
+ break;
+ case BATTERY_STATUS_FULL:
+ status = "Full";
+ break;
+ default:
+ status = "Unknown";
+ }
+ dump += StringPrintf(INDENT3 "Status: %s\n", status.c_str());
+}
+
+} // namespace android