diff options
Diffstat (limited to 'include/ui/InputManager.h')
-rw-r--r-- | include/ui/InputManager.h | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/include/ui/InputManager.h b/include/ui/InputManager.h new file mode 100644 index 0000000..eb27513 --- /dev/null +++ b/include/ui/InputManager.h @@ -0,0 +1,134 @@ +/* + * Copyright (C) 2010 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. + */ + +#ifndef _UI_INPUT_MANAGER_H +#define _UI_INPUT_MANAGER_H + +/** + * Native input manager. + */ + +#include <ui/EventHub.h> +#include <ui/Input.h> +#include <ui/InputDispatchPolicy.h> +#include <utils/Errors.h> +#include <utils/Vector.h> +#include <utils/Timers.h> +#include <utils/RefBase.h> +#include <utils/String8.h> + +namespace android { + +class InputReader; +class InputDispatcher; +class InputReaderThread; +class InputDispatcherThread; + +/* + * The input manager is the core of the system event processing. + * + * The input manager uses two threads. + * + * 1. The InputReaderThread (called "InputReader") reads and preprocesses raw input events, + * applies policy, and posts messages to a queue managed by the DispatcherThread. + * 2. The InputDispatcherThread (called "InputDispatcher") thread waits for new events on the + * queue and asynchronously dispatches them to applications. + * + * By design, the InputReaderThread class and InputDispatcherThread class do not share any + * internal state. Moreover, all communication is done one way from the InputReaderThread + * into the InputDispatcherThread and never the reverse. Both classes may interact with the + * InputDispatchPolicy, however. + * + * The InputManager class never makes any calls into Java itself. Instead, the + * InputDispatchPolicy is responsible for performing all external interactions with the + * system, including calling DVM services. + */ +class InputManagerInterface : public virtual RefBase { +protected: + InputManagerInterface() { } + virtual ~InputManagerInterface() { } + +public: + /* Starts the input manager threads. */ + virtual status_t start() = 0; + + /* Stops the input manager threads and waits for them to exit. */ + virtual status_t stop() = 0; + + /* Registers an input channel prior to using it as the target of an event. */ + virtual status_t registerInputChannel(const sp<InputChannel>& inputChannel) = 0; + + /* Unregisters an input channel. */ + virtual status_t unregisterInputChannel(const sp<InputChannel>& inputChannel) = 0; + + /* + * Query current input state. + * deviceId may be -1 to search for the device automatically, filtered by class. + * deviceClasses may be -1 to ignore device class while searching. + */ + virtual int32_t getScanCodeState(int32_t deviceId, int32_t deviceClasses, + int32_t scanCode) const = 0; + virtual int32_t getKeyCodeState(int32_t deviceId, int32_t deviceClasses, + int32_t keyCode) const = 0; + virtual int32_t getSwitchState(int32_t deviceId, int32_t deviceClasses, + int32_t sw) const = 0; + + /* Determine whether physical keys exist for the given framework-domain key codes. */ + virtual bool hasKeys(size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) const = 0; +}; + +class InputManager : public InputManagerInterface { +protected: + virtual ~InputManager(); + +public: + /* + * Creates an input manager that reads events from the given + * event hub and applies the given input dispatch policy. + */ + InputManager(const sp<EventHubInterface>& eventHub, + const sp<InputDispatchPolicyInterface>& policy); + + virtual status_t start(); + virtual status_t stop(); + + virtual status_t registerInputChannel(const sp<InputChannel>& inputChannel); + virtual status_t unregisterInputChannel(const sp<InputChannel>& inputChannel); + + virtual int32_t getScanCodeState(int32_t deviceId, int32_t deviceClasses, + int32_t scanCode) const; + virtual int32_t getKeyCodeState(int32_t deviceId, int32_t deviceClasses, + int32_t keyCode) const; + virtual int32_t getSwitchState(int32_t deviceId, int32_t deviceClasses, + int32_t sw) const; + virtual bool hasKeys(size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) const; + +private: + sp<EventHubInterface> mEventHub; + sp<InputDispatchPolicyInterface> mPolicy; + + sp<InputDispatcher> mDispatcher; + sp<InputDispatcherThread> mDispatcherThread; + + sp<InputReader> mReader; + sp<InputReaderThread> mReaderThread; + + void configureExcludedDevices(); +}; + +} // namespace android + +#endif // _UI_INPUT_MANAGER_H |