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Diffstat (limited to 'include/ui/InputManager.h')
| -rw-r--r-- | include/ui/InputManager.h | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/include/ui/InputManager.h b/include/ui/InputManager.h new file mode 100644 index 0000000..4012c69 --- /dev/null +++ b/include/ui/InputManager.h @@ -0,0 +1,172 @@ +/* + * 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 <utils/Errors.h> +#include <utils/Vector.h> +#include <utils/Timers.h> +#include <utils/RefBase.h> +#include <utils/String8.h> + +namespace android { + +class InputChannel; + +class InputReaderInterface; +class InputReaderPolicyInterface; +class InputReaderThread; + +class InputDispatcherInterface; +class InputDispatcherPolicyInterface; +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; + + /* Injects an input event and optionally waits for sync. + * The synchronization mode determines whether the method blocks while waiting for + * input injection to proceed. + * Returns one of the INPUT_EVENT_INJECTION_XXX constants. + */ + virtual int32_t injectInputEvent(const InputEvent* event, + int32_t injectorPid, int32_t injectorUid, int32_t syncMode, int32_t timeoutMillis) = 0; + + /* Preempts input dispatch in progress by making pending synchronous + * dispatches asynchronous instead. This method is generally called during a focus + * transition from one application to the next so as to enable the new application + * to start receiving input as soon as possible without having to wait for the + * old application to finish up. + */ + virtual void preemptInputDispatch() = 0; + + /* Gets input device configuration. */ + virtual void getInputConfiguration(InputConfiguration* outConfiguration) = 0; + + /* Gets information about the specified input device. + * Returns OK if the device information was obtained or NAME_NOT_FOUND if there + * was no such device. + */ + virtual status_t getInputDeviceInfo(int32_t deviceId, InputDeviceInfo* outDeviceInfo) = 0; + + /* Gets the list of all registered device ids. */ + virtual void getInputDeviceIds(Vector<int32_t>& outDeviceIds) = 0; + + /* Queries current input state. */ + virtual int32_t getScanCodeState(int32_t deviceId, uint32_t sourceMask, + int32_t scanCode) = 0; + virtual int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask, + int32_t keyCode) = 0; + virtual int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask, + int32_t sw) = 0; + + /* Determines whether physical keys exist for the given framework-domain key codes. */ + virtual bool hasKeys(int32_t deviceId, uint32_t sourceMask, + size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) = 0; +}; + +class InputManager : public InputManagerInterface { +protected: + virtual ~InputManager(); + +public: + InputManager( + const sp<EventHubInterface>& eventHub, + const sp<InputReaderPolicyInterface>& readerPolicy, + const sp<InputDispatcherPolicyInterface>& dispatcherPolicy); + + // (used for testing purposes) + InputManager( + const sp<InputReaderInterface>& reader, + const sp<InputDispatcherInterface>& dispatcher); + + 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 injectInputEvent(const InputEvent* event, + int32_t injectorPid, int32_t injectorUid, int32_t syncMode, int32_t timeoutMillis); + + virtual void preemptInputDispatch(); + + virtual void getInputConfiguration(InputConfiguration* outConfiguration); + virtual status_t getInputDeviceInfo(int32_t deviceId, InputDeviceInfo* outDeviceInfo); + virtual void getInputDeviceIds(Vector<int32_t>& outDeviceIds); + virtual int32_t getScanCodeState(int32_t deviceId, uint32_t sourceMask, + int32_t scanCode); + virtual int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask, + int32_t keyCode); + virtual int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask, + int32_t sw); + virtual bool hasKeys(int32_t deviceId, uint32_t sourceMask, + size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags); + +private: + sp<InputReaderInterface> mReader; + sp<InputReaderThread> mReaderThread; + + sp<InputDispatcherInterface> mDispatcher; + sp<InputDispatcherThread> mDispatcherThread; + + void initialize(); +}; + +} // namespace android + +#endif // _UI_INPUT_MANAGER_H |