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88 lines
3.2 KiB
88 lines
3.2 KiB
/* |
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* Copyright (C) 2015 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#ifndef ANDROID_INPUT_MAPPER_H_ |
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#define ANDROID_INPUT_MAPPER_H_ |
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struct input_device_handle; |
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namespace android { |
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class InputDeviceNode; |
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class InputReport; |
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class InputReportDefinition; |
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struct InputEvent; |
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using InputDeviceHandle = struct input_device_handle; |
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/** |
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* An InputMapper processes raw evdev input events and combines them into |
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* Android input HAL reports. A given InputMapper will focus on a particular |
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* type of input, like key presses or touch events. A single InputDevice may |
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* have multiple InputMappers, corresponding to the different types of inputs it |
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* supports. |
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*/ |
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class InputMapper { |
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public: |
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InputMapper() = default; |
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virtual ~InputMapper() {} |
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/** |
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* If the mapper supports input events from the InputDevice, |
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* configureInputReport will populate the InputReportDefinition and return |
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* true. If input is not supported, false is returned, and the InputDevice |
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* may free or re-use the InputReportDefinition. |
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*/ |
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virtual bool configureInputReport(InputDeviceNode* devNode, InputReportDefinition* report) { |
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return false; |
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} |
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/** |
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* If the mapper supports output events from the InputDevice, |
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* configureOutputReport will populate the InputReportDefinition and return |
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* true. If output is not supported, false is returned, and the InputDevice |
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* may free or re-use the InputReportDefinition. |
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*/ |
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virtual bool configureOutputReport(InputDeviceNode* devNode, InputReportDefinition* report) { |
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return false; |
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} |
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// Set the InputDeviceHandle after registering the device with the host. |
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virtual void setDeviceHandle(InputDeviceHandle* handle) { mDeviceHandle = handle; } |
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// Process the InputEvent. |
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virtual void process(const InputEvent& event) = 0; |
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protected: |
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virtual void setInputReportDefinition(InputReportDefinition* reportDef) final { |
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mInputReportDef = reportDef; |
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} |
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virtual void setOutputReportDefinition(InputReportDefinition* reportDef) final { |
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mOutputReportDef = reportDef; |
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} |
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virtual InputReportDefinition* getInputReportDefinition() final { return mInputReportDef; } |
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virtual InputReportDefinition* getOutputReportDefinition() final { return mOutputReportDef; } |
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virtual InputDeviceHandle* getDeviceHandle() final { return mDeviceHandle; } |
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virtual InputReport* getInputReport() final; |
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private: |
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InputReportDefinition* mInputReportDef = nullptr; |
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InputReportDefinition* mOutputReportDef = nullptr; |
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InputDeviceHandle* mDeviceHandle = nullptr; |
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InputReport* mReport = nullptr; |
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}; |
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} // namespace android |
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#endif // ANDROID_INPUT_MAPPER_H_
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