Request key maps from input manager service.

Instead of each application loading the KeyCharacterMap from
the file system, get them from the input manager service as
part of the InputDevice object.

Refactored InputManager to be a proper singleton instead of
having a bunch of static methods.

InputManager now maintains a cache of all InputDevice objects
that it has loaded.  Currently we never invalidate the cache
which can cause InputDevice to return stale motion ranges if
the device is reconfigured.  This will be fixed in a future change.

Added a fake InputDevice with ID -1 to represent the virtual keyboard.

Change-Id: If7a695839ad0972317a5aab89e9d1e42ace28eb7

1 files changed, 97 insertions, 0 deletions

diff --git a/core/jni/android_view_InputDevice.cpp b/core/jni/android_view_InputDevice.cpp
new file mode 100644
index 0000000..d7d476a
--- /dev/null
+++ b/core/jni/android_view_InputDevice.cpp
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2012 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 <androidfw/Input.h>
+
+#include <android_runtime/AndroidRuntime.h>
+#include <nativehelper/jni.h>
+#include <nativehelper/JNIHelp.h>
+
+#include <ScopedLocalRef.h>
+
+#include "android_view_InputDevice.h"
+#include "android_view_KeyCharacterMap.h"
+
+namespace android {
+
+static struct {
+    jclass clazz;
+
+    jmethodID ctor;
+    jmethodID addMotionRange;
+} gInputDeviceClassInfo;
+
+jobject android_view_InputDevice_create(JNIEnv* env, const InputDeviceInfo& deviceInfo) {
+    ScopedLocalRef<jstring> nameObj(env, env->NewStringUTF(deviceInfo.getName().string()));
+    if (!nameObj.get()) {
+        return NULL;
+    }
+
+    ScopedLocalRef<jstring> descriptorObj(env,
+            env->NewStringUTF(deviceInfo.getDescriptor().string()));
+    if (!descriptorObj.get()) {
+        return NULL;
+    }
+
+    ScopedLocalRef<jobject> kcmObj(env,
+            android_view_KeyCharacterMap_create(env, deviceInfo.getId(),
+            deviceInfo.getKeyCharacterMap()));
+    if (!kcmObj.get()) {
+        return NULL;
+    }
+
+    ScopedLocalRef<jobject> inputDeviceObj(env, env->NewObject(gInputDeviceClassInfo.clazz,
+            gInputDeviceClassInfo.ctor, deviceInfo.getId(), nameObj.get(),
+            descriptorObj.get(), deviceInfo.getSources(), deviceInfo.getKeyboardType(),
+            kcmObj.get()));
+
+    const Vector<InputDeviceInfo::MotionRange>& ranges = deviceInfo.getMotionRanges();
+    for (size_t i = 0; i < ranges.size(); i++) {
+        const InputDeviceInfo::MotionRange& range = ranges.itemAt(i);
+        env->CallVoidMethod(inputDeviceObj.get(), gInputDeviceClassInfo.addMotionRange,
+                range.axis, range.source, range.min, range.max, range.flat, range.fuzz);
+        if (env->ExceptionCheck()) {
+            return NULL;
+        }
+    }
+
+    return env->NewLocalRef(inputDeviceObj.get());
+}
+
+
+#define FIND_CLASS(var, className) \
+        var = env->FindClass(className); \
+        LOG_FATAL_IF(! var, "Unable to find class " className);
+
+#define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
+        var = env->GetMethodID(clazz, methodName, methodDescriptor); \
+        LOG_FATAL_IF(! var, "Unable to find method " methodName);
+
+int register_android_view_InputDevice(JNIEnv* env)
+{
+    FIND_CLASS(gInputDeviceClassInfo.clazz, "android/view/InputDevice");
+    gInputDeviceClassInfo.clazz = jclass(env->NewGlobalRef(gInputDeviceClassInfo.clazz));
+
+    GET_METHOD_ID(gInputDeviceClassInfo.ctor, gInputDeviceClassInfo.clazz,
+            "<init>", "(ILjava/lang/String;Ljava/lang/String;IILandroid/view/KeyCharacterMap;)V");
+
+    GET_METHOD_ID(gInputDeviceClassInfo.addMotionRange, gInputDeviceClassInfo.clazz,
+            "addMotionRange", "(IIFFFF)V");
+
+    return 0;
+}
+
+}; // namespace android