| /* |
| * 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_DEVICE_H |
| #define _UI_INPUT_DEVICE_H |
| |
| #include <ui/EventHub.h> |
| #include <ui/Input.h> |
| #include <utils/KeyedVector.h> |
| #include <utils/threads.h> |
| #include <utils/Timers.h> |
| #include <utils/RefBase.h> |
| #include <utils/String8.h> |
| #include <utils/BitSet.h> |
| |
| #include <stddef.h> |
| #include <unistd.h> |
| |
| /* Maximum pointer id value supported. |
| * (This is limited by our use of BitSet32 to track pointer assignments.) */ |
| #define MAX_POINTER_ID 31 |
| |
| /* Maximum number of historical samples to average. */ |
| #define AVERAGING_HISTORY_SIZE 5 |
| |
| |
| namespace android { |
| |
| extern int32_t updateMetaState(int32_t keyCode, bool down, int32_t oldMetaState); |
| extern int32_t rotateKeyCode(int32_t keyCode, int32_t orientation); |
| |
| /* |
| * An input device structure tracks the state of a single input device. |
| * |
| * This structure is only used by ReaderThread and is not intended to be shared with |
| * DispatcherThread (because that would require locking). This works out fine because |
| * DispatcherThread is only interested in cooked event data anyways and does not need |
| * any of the low-level data from InputDevice. |
| */ |
| struct InputDevice { |
| struct AbsoluteAxisInfo { |
| bool valid; // set to true if axis parameters are known, false otherwise |
| |
| int32_t minValue; // minimum value |
| int32_t maxValue; // maximum value |
| int32_t range; // range of values, equal to maxValue - minValue |
| int32_t flat; // center flat position, eg. flat == 8 means center is between -8 and 8 |
| int32_t fuzz; // error tolerance, eg. fuzz == 4 means value is +/- 4 due to noise |
| }; |
| |
| struct VirtualKey { |
| int32_t keyCode; |
| int32_t scanCode; |
| uint32_t flags; |
| |
| // computed hit box, specified in touch screen coords based on known display size |
| int32_t hitLeft; |
| int32_t hitTop; |
| int32_t hitRight; |
| int32_t hitBottom; |
| |
| inline bool isHit(int32_t x, int32_t y) const { |
| return x >= hitLeft && x <= hitRight && y >= hitTop && y <= hitBottom; |
| } |
| }; |
| |
| struct KeyboardState { |
| struct Current { |
| int32_t metaState; |
| nsecs_t downTime; // time of most recent key down |
| } current; |
| |
| void reset(); |
| }; |
| |
| struct TrackballState { |
| struct Accumulator { |
| enum { |
| FIELD_BTN_MOUSE = 1, |
| FIELD_REL_X = 2, |
| FIELD_REL_Y = 4 |
| }; |
| |
| uint32_t fields; |
| |
| bool btnMouse; |
| int32_t relX; |
| int32_t relY; |
| |
| inline void clear() { |
| fields = 0; |
| } |
| |
| inline bool isDirty() { |
| return fields != 0; |
| } |
| } accumulator; |
| |
| struct Current { |
| bool down; |
| nsecs_t downTime; |
| } current; |
| |
| struct Precalculated { |
| float xScale; |
| float yScale; |
| float xPrecision; |
| float yPrecision; |
| } precalculated; |
| |
| void reset(); |
| }; |
| |
| struct SingleTouchScreenState { |
| struct Accumulator { |
| enum { |
| FIELD_BTN_TOUCH = 1, |
| FIELD_ABS_X = 2, |
| FIELD_ABS_Y = 4, |
| FIELD_ABS_PRESSURE = 8, |
| FIELD_ABS_TOOL_WIDTH = 16 |
| }; |
| |
| uint32_t fields; |
| |
| bool btnTouch; |
| int32_t absX; |
| int32_t absY; |
| int32_t absPressure; |
| int32_t absToolWidth; |
| |
| inline void clear() { |
| fields = 0; |
| } |
| |
| inline bool isDirty() { |
| return fields != 0; |
| } |
| } accumulator; |
| |
| struct Current { |
| bool down; |
| int32_t x; |
| int32_t y; |
| int32_t pressure; |
| int32_t size; |
| } current; |
| |
| void reset(); |
| }; |
| |
| struct MultiTouchScreenState { |
| struct Accumulator { |
| enum { |
| FIELD_ABS_MT_POSITION_X = 1, |
| FIELD_ABS_MT_POSITION_Y = 2, |
| FIELD_ABS_MT_TOUCH_MAJOR = 4, |
| FIELD_ABS_MT_WIDTH_MAJOR = 8, |
| FIELD_ABS_MT_TRACKING_ID = 16 |
| }; |
| |
| uint32_t pointerCount; |
| struct Pointer { |
| uint32_t fields; |
| |
| int32_t absMTPositionX; |
| int32_t absMTPositionY; |
| int32_t absMTTouchMajor; |
| int32_t absMTWidthMajor; |
| int32_t absMTTrackingId; |
| |
| inline void clear() { |
| fields = 0; |
| } |
| } pointers[MAX_POINTERS + 1]; // + 1 to remove the need for extra range checks |
| |
| inline void clear() { |
| pointerCount = 0; |
| pointers[0].clear(); |
| } |
| |
| inline bool isDirty() { |
| return pointerCount != 0; |
| } |
| } accumulator; |
| |
| void reset(); |
| }; |
| |
| struct PointerData { |
| uint32_t id; |
| int32_t x; |
| int32_t y; |
| int32_t pressure; |
| int32_t size; |
| }; |
| |
| struct TouchData { |
| uint32_t pointerCount; |
| PointerData pointers[MAX_POINTERS]; |
| BitSet32 idBits; |
| uint32_t idToIndex[MAX_POINTER_ID + 1]; |
| |
| void copyFrom(const TouchData& other); |
| |
| inline void clear() { |
| pointerCount = 0; |
| idBits.clear(); |
| } |
| }; |
| |
| // common state used for both single-touch and multi-touch screens after the initial |
| // touch decoding has been performed |
| struct TouchScreenState { |
| Vector<VirtualKey> virtualKeys; |
| |
| struct Parameters { |
| bool useBadTouchFilter; |
| bool useJumpyTouchFilter; |
| bool useAveragingTouchFilter; |
| |
| AbsoluteAxisInfo xAxis; |
| AbsoluteAxisInfo yAxis; |
| AbsoluteAxisInfo pressureAxis; |
| AbsoluteAxisInfo sizeAxis; |
| } parameters; |
| |
| // The touch data of the current sample being processed. |
| TouchData currentTouch; |
| |
| // The touch data of the previous sample that was processed. This is updated |
| // incrementally while the current sample is being processed. |
| TouchData lastTouch; |
| |
| // The time the primary pointer last went down. |
| nsecs_t downTime; |
| |
| struct CurrentVirtualKeyState { |
| enum Status { |
| STATUS_UP, |
| STATUS_DOWN, |
| STATUS_CANCELED |
| }; |
| |
| Status status; |
| nsecs_t downTime; |
| int32_t keyCode; |
| int32_t scanCode; |
| } currentVirtualKey; |
| |
| struct AveragingTouchFilterState { |
| // Individual history tracks are stored by pointer id |
| uint32_t historyStart[MAX_POINTERS]; |
| uint32_t historyEnd[MAX_POINTERS]; |
| struct { |
| struct { |
| int32_t x; |
| int32_t y; |
| int32_t pressure; |
| } pointers[MAX_POINTERS]; |
| } historyData[AVERAGING_HISTORY_SIZE]; |
| } averagingTouchFilter; |
| |
| struct JumpTouchFilterState { |
| int32_t jumpyPointsDropped; |
| } jumpyTouchFilter; |
| |
| struct Precalculated { |
| int32_t xOrigin; |
| float xScale; |
| |
| int32_t yOrigin; |
| float yScale; |
| |
| int32_t pressureOrigin; |
| float pressureScale; |
| |
| int32_t sizeOrigin; |
| float sizeScale; |
| } precalculated; |
| |
| void reset(); |
| |
| bool applyBadTouchFilter(); |
| bool applyJumpyTouchFilter(); |
| void applyAveragingTouchFilter(); |
| void calculatePointerIds(); |
| |
| bool isPointInsideDisplay(int32_t x, int32_t y) const; |
| const InputDevice::VirtualKey* findVirtualKeyHit() const; |
| }; |
| |
| InputDevice(int32_t id, uint32_t classes, String8 name); |
| |
| int32_t id; |
| uint32_t classes; |
| String8 name; |
| bool ignored; |
| |
| KeyboardState keyboard; |
| TrackballState trackball; |
| TouchScreenState touchScreen; |
| union { |
| SingleTouchScreenState singleTouchScreen; |
| MultiTouchScreenState multiTouchScreen; |
| }; |
| |
| void reset(); |
| |
| inline bool isKeyboard() const { return classes & INPUT_DEVICE_CLASS_KEYBOARD; } |
| inline bool isAlphaKey() const { return classes & INPUT_DEVICE_CLASS_ALPHAKEY; } |
| inline bool isTrackball() const { return classes & INPUT_DEVICE_CLASS_TRACKBALL; } |
| inline bool isDPad() const { return classes & INPUT_DEVICE_CLASS_DPAD; } |
| inline bool isSingleTouchScreen() const { return (classes |
| & (INPUT_DEVICE_CLASS_TOUCHSCREEN | INPUT_DEVICE_CLASS_TOUCHSCREEN_MT)) |
| == INPUT_DEVICE_CLASS_TOUCHSCREEN; } |
| inline bool isMultiTouchScreen() const { return classes |
| & INPUT_DEVICE_CLASS_TOUCHSCREEN_MT; } |
| inline bool isTouchScreen() const { return classes |
| & (INPUT_DEVICE_CLASS_TOUCHSCREEN | INPUT_DEVICE_CLASS_TOUCHSCREEN_MT); } |
| }; |
| |
| } // namespace android |
| |
| #endif // _UI_INPUT_DEVICE_H |