Input.h revision 26063a9155ddd18d858cea7fac7c1ddf71e1bcb7
1/* 2 * Copyright (C) 2010 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#ifndef _LIBINPUT_INPUT_H 18#define _LIBINPUT_INPUT_H 19 20/** 21 * Native input event structures. 22 */ 23 24#include <android/input.h> 25#include <utils/BitSet.h> 26#include <utils/KeyedVector.h> 27#include <utils/RefBase.h> 28#include <utils/String8.h> 29#include <utils/Timers.h> 30#include <utils/Vector.h> 31 32/* 33 * Additional private constants not defined in ndk/ui/input.h. 34 */ 35enum { 36 /* Signifies that the key is being predispatched */ 37 AKEY_EVENT_FLAG_PREDISPATCH = 0x20000000, 38 39 /* Private control to determine when an app is tracking a key sequence. */ 40 AKEY_EVENT_FLAG_START_TRACKING = 0x40000000, 41 42 /* Key event is inconsistent with previously sent key events. */ 43 AKEY_EVENT_FLAG_TAINTED = 0x80000000, 44}; 45 46enum { 47 /* Motion event is inconsistent with previously sent motion events. */ 48 AMOTION_EVENT_FLAG_TAINTED = 0x80000000, 49}; 50 51enum { 52 /* Used when a motion event is not associated with any display. 53 * Typically used for non-pointer events. */ 54 ADISPLAY_ID_NONE = -1, 55 56 /* The default display id. */ 57 ADISPLAY_ID_DEFAULT = 0, 58}; 59 60enum { 61 /* 62 * Indicates that an input device has switches. 63 * This input source flag is hidden from the API because switches are only used by the system 64 * and applications have no way to interact with them. 65 */ 66 AINPUT_SOURCE_SWITCH = 0x80000000, 67}; 68 69enum { 70 /** 71 * Constants for LEDs. Hidden from the API since we don't actually expose a way to interact 72 * with LEDs to developers 73 * 74 * NOTE: If you add LEDs here, you must also add them to KeycodeLabels.h 75 */ 76 77 ALED_NUM_LOCK = 0x00, 78 ALED_CAPS_LOCK = 0x01, 79 ALED_SCROLL_LOCK = 0x02, 80 ALED_COMPOSE = 0x03, 81 ALED_KANA = 0x04, 82 ALED_SLEEP = 0x05, 83 ALED_SUSPEND = 0x06, 84 ALED_MUTE = 0x07, 85 ALED_MISC = 0x08, 86 ALED_MAIL = 0x09, 87 ALED_CHARGING = 0x0a, 88 ALED_CONTROLLER_1 = 0x10, 89 ALED_CONTROLLER_2 = 0x11, 90 ALED_CONTROLLER_3 = 0x12, 91 ALED_CONTROLLER_4 = 0x13, 92}; 93 94/* Maximum number of controller LEDs we support */ 95#define MAX_CONTROLLER_LEDS 4 96 97/* 98 * SystemUiVisibility constants from View. 99 */ 100enum { 101 ASYSTEM_UI_VISIBILITY_STATUS_BAR_VISIBLE = 0, 102 ASYSTEM_UI_VISIBILITY_STATUS_BAR_HIDDEN = 0x00000001, 103}; 104 105/* 106 * Maximum number of pointers supported per motion event. 107 * Smallest number of pointers is 1. 108 * (We want at least 10 but some touch controllers obstensibly configured for 10 pointers 109 * will occasionally emit 11. There is not much harm making this constant bigger.) 110 */ 111#define MAX_POINTERS 16 112 113/* 114 * Maximum pointer id value supported in a motion event. 115 * Smallest pointer id is 0. 116 * (This is limited by our use of BitSet32 to track pointer assignments.) 117 */ 118#define MAX_POINTER_ID 31 119 120/* 121 * Declare a concrete type for the NDK's input event forward declaration. 122 */ 123struct AInputEvent { 124 virtual ~AInputEvent() { } 125}; 126 127/* 128 * Declare a concrete type for the NDK's input device forward declaration. 129 */ 130struct AInputDevice { 131 virtual ~AInputDevice() { } 132}; 133 134 135namespace android { 136 137#ifdef HAVE_ANDROID_OS 138class Parcel; 139#endif 140 141/* 142 * Flags that flow alongside events in the input dispatch system to help with certain 143 * policy decisions such as waking from device sleep. 144 * 145 * These flags are also defined in frameworks/base/core/java/android/view/WindowManagerPolicy.java. 146 */ 147enum { 148 /* These flags originate in RawEvents and are generally set in the key map. 149 * NOTE: If you edit these flags, also edit labels in KeycodeLabels.h. */ 150 151 POLICY_FLAG_WAKE = 0x00000001, 152 POLICY_FLAG_WAKE_DROPPED = 0x00000002, 153 POLICY_FLAG_SHIFT = 0x00000004, 154 POLICY_FLAG_CAPS_LOCK = 0x00000008, 155 POLICY_FLAG_ALT = 0x00000010, 156 POLICY_FLAG_ALT_GR = 0x00000020, 157 POLICY_FLAG_MENU = 0x00000040, 158 POLICY_FLAG_LAUNCHER = 0x00000080, 159 POLICY_FLAG_VIRTUAL = 0x00000100, 160 POLICY_FLAG_FUNCTION = 0x00000200, 161 162 POLICY_FLAG_RAW_MASK = 0x0000ffff, 163 164 /* These flags are set by the input dispatcher. */ 165 166 // Indicates that the input event was injected. 167 POLICY_FLAG_INJECTED = 0x01000000, 168 169 // Indicates that the input event is from a trusted source such as a directly attached 170 // input device or an application with system-wide event injection permission. 171 POLICY_FLAG_TRUSTED = 0x02000000, 172 173 // Indicates that the input event has passed through an input filter. 174 POLICY_FLAG_FILTERED = 0x04000000, 175 176 // Disables automatic key repeating behavior. 177 POLICY_FLAG_DISABLE_KEY_REPEAT = 0x08000000, 178 179 /* These flags are set by the input reader policy as it intercepts each event. */ 180 181 // Indicates that the device was in an interactive state when the 182 // event was intercepted. 183 POLICY_FLAG_INTERACTIVE = 0x20000000, 184 185 // Indicates that the event should be dispatched to applications. 186 // The input event should still be sent to the InputDispatcher so that it can see all 187 // input events received include those that it will not deliver. 188 POLICY_FLAG_PASS_TO_USER = 0x40000000, 189}; 190 191/* 192 * Pointer coordinate data. 193 */ 194struct PointerCoords { 195 enum { MAX_AXES = 14 }; // 14 so that sizeof(PointerCoords) == 64 196 197 // Bitfield of axes that are present in this structure. 198 uint64_t bits __attribute__((aligned(8))); 199 200 // Values of axes that are stored in this structure packed in order by axis id 201 // for each axis that is present in the structure according to 'bits'. 202 float values[MAX_AXES]; 203 204 inline void clear() { 205 BitSet64::clear(bits); 206 } 207 208 bool isEmpty() const { 209 return BitSet64::isEmpty(bits); 210 } 211 212 float getAxisValue(int32_t axis) const; 213 status_t setAxisValue(int32_t axis, float value); 214 215 void scale(float scale); 216 void applyOffset(float xOffset, float yOffset); 217 218 inline float getX() const { 219 return getAxisValue(AMOTION_EVENT_AXIS_X); 220 } 221 222 inline float getY() const { 223 return getAxisValue(AMOTION_EVENT_AXIS_Y); 224 } 225 226#ifdef HAVE_ANDROID_OS 227 status_t readFromParcel(Parcel* parcel); 228 status_t writeToParcel(Parcel* parcel) const; 229#endif 230 231 bool operator==(const PointerCoords& other) const; 232 inline bool operator!=(const PointerCoords& other) const { 233 return !(*this == other); 234 } 235 236 void copyFrom(const PointerCoords& other); 237 238private: 239 void tooManyAxes(int axis); 240}; 241 242/* 243 * Pointer property data. 244 */ 245struct PointerProperties { 246 // The id of the pointer. 247 int32_t id; 248 249 // The pointer tool type. 250 int32_t toolType; 251 252 inline void clear() { 253 id = -1; 254 toolType = 0; 255 } 256 257 bool operator==(const PointerProperties& other) const; 258 inline bool operator!=(const PointerProperties& other) const { 259 return !(*this == other); 260 } 261 262 void copyFrom(const PointerProperties& other); 263}; 264 265/* 266 * Input events. 267 */ 268class InputEvent : public AInputEvent { 269public: 270 virtual ~InputEvent() { } 271 272 virtual int32_t getType() const = 0; 273 274 inline int32_t getDeviceId() const { return mDeviceId; } 275 276 inline int32_t getSource() const { return mSource; } 277 278 inline void setSource(int32_t source) { mSource = source; } 279 280protected: 281 void initialize(int32_t deviceId, int32_t source); 282 void initialize(const InputEvent& from); 283 284 int32_t mDeviceId; 285 int32_t mSource; 286}; 287 288/* 289 * Key events. 290 */ 291class KeyEvent : public InputEvent { 292public: 293 virtual ~KeyEvent() { } 294 295 virtual int32_t getType() const { return AINPUT_EVENT_TYPE_KEY; } 296 297 inline int32_t getAction() const { return mAction; } 298 299 inline int32_t getFlags() const { return mFlags; } 300 301 inline void setFlags(int32_t flags) { mFlags = flags; } 302 303 inline int32_t getKeyCode() const { return mKeyCode; } 304 305 inline int32_t getScanCode() const { return mScanCode; } 306 307 inline int32_t getMetaState() const { return mMetaState; } 308 309 inline int32_t getRepeatCount() const { return mRepeatCount; } 310 311 inline nsecs_t getDownTime() const { return mDownTime; } 312 313 inline nsecs_t getEventTime() const { return mEventTime; } 314 315 // Return true if this event may have a default action implementation. 316 static bool hasDefaultAction(int32_t keyCode); 317 bool hasDefaultAction() const; 318 319 // Return true if this event represents a system key. 320 static bool isSystemKey(int32_t keyCode); 321 bool isSystemKey() const; 322 323 void initialize( 324 int32_t deviceId, 325 int32_t source, 326 int32_t action, 327 int32_t flags, 328 int32_t keyCode, 329 int32_t scanCode, 330 int32_t metaState, 331 int32_t repeatCount, 332 nsecs_t downTime, 333 nsecs_t eventTime); 334 void initialize(const KeyEvent& from); 335 336protected: 337 int32_t mAction; 338 int32_t mFlags; 339 int32_t mKeyCode; 340 int32_t mScanCode; 341 int32_t mMetaState; 342 int32_t mRepeatCount; 343 nsecs_t mDownTime; 344 nsecs_t mEventTime; 345}; 346 347/* 348 * Motion events. 349 */ 350class MotionEvent : public InputEvent { 351public: 352 virtual ~MotionEvent() { } 353 354 virtual int32_t getType() const { return AINPUT_EVENT_TYPE_MOTION; } 355 356 inline int32_t getAction() const { return mAction; } 357 358 inline int32_t getActionMasked() const { return mAction & AMOTION_EVENT_ACTION_MASK; } 359 360 inline int32_t getActionIndex() const { 361 return (mAction & AMOTION_EVENT_ACTION_POINTER_INDEX_MASK) 362 >> AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT; 363 } 364 365 inline void setAction(int32_t action) { mAction = action; } 366 367 inline int32_t getFlags() const { return mFlags; } 368 369 inline void setFlags(int32_t flags) { mFlags = flags; } 370 371 inline int32_t getEdgeFlags() const { return mEdgeFlags; } 372 373 inline void setEdgeFlags(int32_t edgeFlags) { mEdgeFlags = edgeFlags; } 374 375 inline int32_t getMetaState() const { return mMetaState; } 376 377 inline void setMetaState(int32_t metaState) { mMetaState = metaState; } 378 379 inline int32_t getButtonState() const { return mButtonState; } 380 381 inline float getXOffset() const { return mXOffset; } 382 383 inline float getYOffset() const { return mYOffset; } 384 385 inline float getXPrecision() const { return mXPrecision; } 386 387 inline float getYPrecision() const { return mYPrecision; } 388 389 inline nsecs_t getDownTime() const { return mDownTime; } 390 391 inline void setDownTime(nsecs_t downTime) { mDownTime = downTime; } 392 393 inline size_t getPointerCount() const { return mPointerProperties.size(); } 394 395 inline const PointerProperties* getPointerProperties(size_t pointerIndex) const { 396 return &mPointerProperties[pointerIndex]; 397 } 398 399 inline int32_t getPointerId(size_t pointerIndex) const { 400 return mPointerProperties[pointerIndex].id; 401 } 402 403 inline int32_t getToolType(size_t pointerIndex) const { 404 return mPointerProperties[pointerIndex].toolType; 405 } 406 407 inline nsecs_t getEventTime() const { return mSampleEventTimes[getHistorySize()]; } 408 409 const PointerCoords* getRawPointerCoords(size_t pointerIndex) const; 410 411 float getRawAxisValue(int32_t axis, size_t pointerIndex) const; 412 413 inline float getRawX(size_t pointerIndex) const { 414 return getRawAxisValue(AMOTION_EVENT_AXIS_X, pointerIndex); 415 } 416 417 inline float getRawY(size_t pointerIndex) const { 418 return getRawAxisValue(AMOTION_EVENT_AXIS_Y, pointerIndex); 419 } 420 421 float getAxisValue(int32_t axis, size_t pointerIndex) const; 422 423 inline float getX(size_t pointerIndex) const { 424 return getAxisValue(AMOTION_EVENT_AXIS_X, pointerIndex); 425 } 426 427 inline float getY(size_t pointerIndex) const { 428 return getAxisValue(AMOTION_EVENT_AXIS_Y, pointerIndex); 429 } 430 431 inline float getPressure(size_t pointerIndex) const { 432 return getAxisValue(AMOTION_EVENT_AXIS_PRESSURE, pointerIndex); 433 } 434 435 inline float getSize(size_t pointerIndex) const { 436 return getAxisValue(AMOTION_EVENT_AXIS_SIZE, pointerIndex); 437 } 438 439 inline float getTouchMajor(size_t pointerIndex) const { 440 return getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR, pointerIndex); 441 } 442 443 inline float getTouchMinor(size_t pointerIndex) const { 444 return getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR, pointerIndex); 445 } 446 447 inline float getToolMajor(size_t pointerIndex) const { 448 return getAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR, pointerIndex); 449 } 450 451 inline float getToolMinor(size_t pointerIndex) const { 452 return getAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR, pointerIndex); 453 } 454 455 inline float getOrientation(size_t pointerIndex) const { 456 return getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, pointerIndex); 457 } 458 459 inline size_t getHistorySize() const { return mSampleEventTimes.size() - 1; } 460 461 inline nsecs_t getHistoricalEventTime(size_t historicalIndex) const { 462 return mSampleEventTimes[historicalIndex]; 463 } 464 465 const PointerCoords* getHistoricalRawPointerCoords( 466 size_t pointerIndex, size_t historicalIndex) const; 467 468 float getHistoricalRawAxisValue(int32_t axis, size_t pointerIndex, 469 size_t historicalIndex) const; 470 471 inline float getHistoricalRawX(size_t pointerIndex, size_t historicalIndex) const { 472 return getHistoricalRawAxisValue( 473 AMOTION_EVENT_AXIS_X, pointerIndex, historicalIndex); 474 } 475 476 inline float getHistoricalRawY(size_t pointerIndex, size_t historicalIndex) const { 477 return getHistoricalRawAxisValue( 478 AMOTION_EVENT_AXIS_Y, pointerIndex, historicalIndex); 479 } 480 481 float getHistoricalAxisValue(int32_t axis, size_t pointerIndex, size_t historicalIndex) const; 482 483 inline float getHistoricalX(size_t pointerIndex, size_t historicalIndex) const { 484 return getHistoricalAxisValue( 485 AMOTION_EVENT_AXIS_X, pointerIndex, historicalIndex); 486 } 487 488 inline float getHistoricalY(size_t pointerIndex, size_t historicalIndex) const { 489 return getHistoricalAxisValue( 490 AMOTION_EVENT_AXIS_Y, pointerIndex, historicalIndex); 491 } 492 493 inline float getHistoricalPressure(size_t pointerIndex, size_t historicalIndex) const { 494 return getHistoricalAxisValue( 495 AMOTION_EVENT_AXIS_PRESSURE, pointerIndex, historicalIndex); 496 } 497 498 inline float getHistoricalSize(size_t pointerIndex, size_t historicalIndex) const { 499 return getHistoricalAxisValue( 500 AMOTION_EVENT_AXIS_SIZE, pointerIndex, historicalIndex); 501 } 502 503 inline float getHistoricalTouchMajor(size_t pointerIndex, size_t historicalIndex) const { 504 return getHistoricalAxisValue( 505 AMOTION_EVENT_AXIS_TOUCH_MAJOR, pointerIndex, historicalIndex); 506 } 507 508 inline float getHistoricalTouchMinor(size_t pointerIndex, size_t historicalIndex) const { 509 return getHistoricalAxisValue( 510 AMOTION_EVENT_AXIS_TOUCH_MINOR, pointerIndex, historicalIndex); 511 } 512 513 inline float getHistoricalToolMajor(size_t pointerIndex, size_t historicalIndex) const { 514 return getHistoricalAxisValue( 515 AMOTION_EVENT_AXIS_TOOL_MAJOR, pointerIndex, historicalIndex); 516 } 517 518 inline float getHistoricalToolMinor(size_t pointerIndex, size_t historicalIndex) const { 519 return getHistoricalAxisValue( 520 AMOTION_EVENT_AXIS_TOOL_MINOR, pointerIndex, historicalIndex); 521 } 522 523 inline float getHistoricalOrientation(size_t pointerIndex, size_t historicalIndex) const { 524 return getHistoricalAxisValue( 525 AMOTION_EVENT_AXIS_ORIENTATION, pointerIndex, historicalIndex); 526 } 527 528 ssize_t findPointerIndex(int32_t pointerId) const; 529 530 void initialize( 531 int32_t deviceId, 532 int32_t source, 533 int32_t action, 534 int32_t flags, 535 int32_t edgeFlags, 536 int32_t metaState, 537 int32_t buttonState, 538 float xOffset, 539 float yOffset, 540 float xPrecision, 541 float yPrecision, 542 nsecs_t downTime, 543 nsecs_t eventTime, 544 size_t pointerCount, 545 const PointerProperties* pointerProperties, 546 const PointerCoords* pointerCoords); 547 548 void copyFrom(const MotionEvent* other, bool keepHistory); 549 550 void addSample( 551 nsecs_t eventTime, 552 const PointerCoords* pointerCoords); 553 554 void offsetLocation(float xOffset, float yOffset); 555 556 void scale(float scaleFactor); 557 558 // Apply 3x3 perspective matrix transformation. 559 // Matrix is in row-major form and compatible with SkMatrix. 560 void transform(const float matrix[9]); 561 562#ifdef HAVE_ANDROID_OS 563 status_t readFromParcel(Parcel* parcel); 564 status_t writeToParcel(Parcel* parcel) const; 565#endif 566 567 static bool isTouchEvent(int32_t source, int32_t action); 568 inline bool isTouchEvent() const { 569 return isTouchEvent(mSource, mAction); 570 } 571 572 // Low-level accessors. 573 inline const PointerProperties* getPointerProperties() const { 574 return mPointerProperties.array(); 575 } 576 inline const nsecs_t* getSampleEventTimes() const { return mSampleEventTimes.array(); } 577 inline const PointerCoords* getSamplePointerCoords() const { 578 return mSamplePointerCoords.array(); 579 } 580 581protected: 582 int32_t mAction; 583 int32_t mFlags; 584 int32_t mEdgeFlags; 585 int32_t mMetaState; 586 int32_t mButtonState; 587 float mXOffset; 588 float mYOffset; 589 float mXPrecision; 590 float mYPrecision; 591 nsecs_t mDownTime; 592 Vector<PointerProperties> mPointerProperties; 593 Vector<nsecs_t> mSampleEventTimes; 594 Vector<PointerCoords> mSamplePointerCoords; 595}; 596 597/* 598 * Input event factory. 599 */ 600class InputEventFactoryInterface { 601protected: 602 virtual ~InputEventFactoryInterface() { } 603 604public: 605 InputEventFactoryInterface() { } 606 607 virtual KeyEvent* createKeyEvent() = 0; 608 virtual MotionEvent* createMotionEvent() = 0; 609}; 610 611/* 612 * A simple input event factory implementation that uses a single preallocated instance 613 * of each type of input event that are reused for each request. 614 */ 615class PreallocatedInputEventFactory : public InputEventFactoryInterface { 616public: 617 PreallocatedInputEventFactory() { } 618 virtual ~PreallocatedInputEventFactory() { } 619 620 virtual KeyEvent* createKeyEvent() { return & mKeyEvent; } 621 virtual MotionEvent* createMotionEvent() { return & mMotionEvent; } 622 623private: 624 KeyEvent mKeyEvent; 625 MotionEvent mMotionEvent; 626}; 627 628/* 629 * An input event factory implementation that maintains a pool of input events. 630 */ 631class PooledInputEventFactory : public InputEventFactoryInterface { 632public: 633 PooledInputEventFactory(size_t maxPoolSize = 20); 634 virtual ~PooledInputEventFactory(); 635 636 virtual KeyEvent* createKeyEvent(); 637 virtual MotionEvent* createMotionEvent(); 638 639 void recycle(InputEvent* event); 640 641private: 642 const size_t mMaxPoolSize; 643 644 Vector<KeyEvent*> mKeyEventPool; 645 Vector<MotionEvent*> mMotionEventPool; 646}; 647 648} // namespace android 649 650#endif // _LIBINPUT_INPUT_H 651