1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <cstdint> 20 #include "HidUsageAccumulator.h" 21 22 namespace android { 23 24 class InputDeviceContext; 25 struct RawEvent; 26 27 /* Keeps track of the state of touch, stylus and tool buttons. */ 28 class TouchButtonAccumulator { 29 public: TouchButtonAccumulator(const InputDeviceContext & deviceContext)30 explicit TouchButtonAccumulator(const InputDeviceContext& deviceContext) 31 : mDeviceContext(deviceContext){}; 32 33 void configure(); 34 void reset(); 35 36 void process(const RawEvent* rawEvent); 37 38 uint32_t getButtonState() const; 39 ToolType getToolType() const; 40 bool isToolActive() const; 41 bool isHovering() const; 42 bool hasStylus() const; 43 bool hasButtonTouch() const; 44 45 /* 46 * Returns the number of touches reported by the device through its BTN_TOOL_FINGER and 47 * BTN_TOOL_*TAP "buttons". Note that this count includes touches reported with their 48 * ABS_MT_TOOL_TYPE set to MT_TOOL_PALM. 49 */ 50 int getTouchCount() const; 51 52 private: 53 bool mHaveBtnTouch{}; 54 bool mHaveStylus{}; 55 56 bool mBtnTouch{}; 57 bool mBtnStylus{}; 58 bool mBtnStylus2{}; 59 bool mBtnToolFinger{}; 60 bool mBtnToolPen{}; 61 bool mBtnToolRubber{}; 62 bool mBtnToolBrush{}; 63 bool mBtnToolPencil{}; 64 bool mBtnToolAirbrush{}; 65 bool mBtnToolMouse{}; 66 bool mBtnToolLens{}; 67 bool mBtnToolDoubleTap{}; 68 bool mBtnToolTripleTap{}; 69 bool mBtnToolQuadTap{}; 70 bool mBtnToolQuintTap{}; 71 72 HidUsageAccumulator mHidUsageAccumulator{}; 73 74 const InputDeviceContext& mDeviceContext; 75 76 void processMappedKey(int32_t scanCode, bool down); 77 }; 78 79 } // namespace android 80