Refactor input reader to support new device types more easily.

Refactored the input reader so that each raw input protocol is handled
by a separate subclass of the new InputMapper type.  This way, behaviors
pertaining to keyboard, trackballs, touchscreens, switches and other
devices are clearly distinguished for improved maintainability.

Added partial support for describing capabilities of input devices
(incomplete and untested for now, will be fleshed out in later commits).

Simplified EventHub interface somewhat since InputReader is taking over
more of the work.

Cleaned up some of the interactions between InputManager and
WindowManagerService related to reading input state.

Fixed swiping finger from screen edge into display area.

Added logging of device information to 'dumpsys window'.

Change-Id: I17faffc33e3aec3a0f33f0b37e81a70609378612

native/android/input.cpp

@@ -21,14 +21,21 @@
 #include <ui/Input.h>
 #include <ui/InputTransport.h>
 #include <utils/PollLoop.h>
+#include <utils/RefBase.h>
+#include <utils/Vector.h>
 
 #include <android_runtime/android_app_NativeActivity.h>
 
 #include <poll.h>
+#include <errno.h>
 
 using android::InputEvent;
 using android::KeyEvent;
 using android::MotionEvent;
+using android::InputDeviceInfo;
+using android::InputDeviceProxy;
+using android::sp;
+using android::Vector;
 
 int32_t AInputEvent_getType(const AInputEvent* event) {
     return static_cast<const InputEvent*>(event)->getType();
@@ -263,3 +270,74 @@ int32_t AInputQueue_preDispatchEvent(AInputQueue* queue, AInputEvent* event) {
 void AInputQueue_finishEvent(AInputQueue* queue, AInputEvent* event, int handled) {
     queue->finishEvent(event, handled != 0);
 }
+
+
+int32_t AInputDevice_getDeviceIds(int32_t* idBuf, size_t nMax, size_t* nActual) {
+    Vector<int32_t> ids;
+    InputDeviceProxy::getDeviceIds(ids);
+
+    if (nActual) {
+        *nActual = ids.size();
+    }
+
+    if (idBuf && ids.size() < nMax) {
+        memcpy(idBuf, ids.array(), ids.size() * sizeof(int32_t));
+        return 0;
+    }
+
+    return -ENOMEM;
+}
+
+AInputDevice* AInputDevice_acquire(int32_t deviceId) {
+    sp<InputDeviceProxy> proxy(InputDeviceProxy::getDevice(deviceId));
+    if (proxy == NULL) {
+        return NULL;
+    }
+    proxy->incStrong((void*)AInputDevice_acquire);
+    return static_cast<AInputDevice*>(proxy.get());
+}
+
+void AInputDevice_release(AInputDevice* device) {
+    if (device) {
+        InputDeviceProxy* proxy = static_cast<InputDeviceProxy*>(device);
+        proxy->decStrong((void*)AInputDevice_acquire);
+    }
+}
+
+const char* AInputDevice_getName(AInputDevice* device) {
+    InputDeviceProxy* proxy = static_cast<InputDeviceProxy*>(device);
+    return proxy->getInfo()->getName().string();
+}
+
+uint32_t AInputDevice_getSources(AInputDevice* device) {
+    InputDeviceProxy* proxy = static_cast<InputDeviceProxy*>(device);
+    return proxy->getInfo()->getSources();
+}
+
+int32_t AInputDevice_getKeyboardType(AInputDevice* device) {
+    InputDeviceProxy* proxy = static_cast<InputDeviceProxy*>(device);
+    return proxy->getInfo()->getKeyboardType();
+}
+
+int32_t AInputDevice_getMotionRange(AInputDevice* device, int32_t rangeType,
+        float* outMin, float* outMax, float* outFlat, float* outFuzz) {
+    InputDeviceProxy* proxy = static_cast<InputDeviceProxy*>(device);
+    const InputDeviceInfo::MotionRange* range = proxy->getInfo()->getMotionRange(rangeType);
+    if (range) {
+        if (outMin) {
+            *outMin = range->min;
+        }
+        if (outMax) {
+            *outMax = range->max;
+        }
+        if (outFlat) {
+            *outFlat = range->flat;
+        }
+        if (outFuzz) {
+            *outFuzz = range->fuzz;
+        }
+        return 0;
+    } else {
+        return -ENOTSUP;
+    }
+}