PointerTracker.java revision 8e2b34cdb24adb1563cc296a4741be7391fa24e9
1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 5 * use this file except in compliance with the License. You may obtain a copy of 6 * 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, WITHOUT 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 13 * License for the specific language governing permissions and limitations under 14 * the License. 15 */ 16 17package com.android.inputmethod.keyboard; 18 19import android.content.res.TypedArray; 20import android.os.SystemClock; 21import android.util.Log; 22import android.view.MotionEvent; 23 24import com.android.inputmethod.accessibility.AccessibilityUtils; 25import com.android.inputmethod.keyboard.internal.GestureStroke; 26import com.android.inputmethod.keyboard.internal.GestureStroke.GestureStrokeParams; 27import com.android.inputmethod.keyboard.internal.GestureStrokeWithPreviewPoints; 28import com.android.inputmethod.keyboard.internal.PointerTrackerQueue; 29import com.android.inputmethod.latin.CollectionUtils; 30import com.android.inputmethod.latin.Constants; 31import com.android.inputmethod.latin.CoordinateUtils; 32import com.android.inputmethod.latin.InputPointers; 33import com.android.inputmethod.latin.LatinImeLogger; 34import com.android.inputmethod.latin.R; 35import com.android.inputmethod.latin.define.ProductionFlag; 36import com.android.inputmethod.research.ResearchLogger; 37 38import java.util.ArrayList; 39 40public final class PointerTracker implements PointerTrackerQueue.Element { 41 private static final String TAG = PointerTracker.class.getSimpleName(); 42 private static final boolean DEBUG_EVENT = false; 43 private static final boolean DEBUG_MOVE_EVENT = false; 44 private static final boolean DEBUG_LISTENER = false; 45 private static boolean DEBUG_MODE = LatinImeLogger.sDBG || DEBUG_EVENT; 46 47 /** True if {@link PointerTracker}s should handle gesture events. */ 48 private static boolean sShouldHandleGesture = false; 49 private static boolean sMainDictionaryAvailable = false; 50 private static boolean sGestureHandlingEnabledByInputField = false; 51 private static boolean sGestureHandlingEnabledByUser = false; 52 53 public interface KeyEventHandler { 54 /** 55 * Get KeyDetector object that is used for this PointerTracker. 56 * @return the KeyDetector object that is used for this PointerTracker 57 */ 58 public KeyDetector getKeyDetector(); 59 60 /** 61 * Get KeyboardActionListener object that is used to register key code and so on. 62 * @return the KeyboardActionListner for this PointerTracker 63 */ 64 public KeyboardActionListener getKeyboardActionListener(); 65 66 /** 67 * Get DrawingProxy object that is used for this PointerTracker. 68 * @return the DrawingProxy object that is used for this PointerTracker 69 */ 70 public DrawingProxy getDrawingProxy(); 71 72 /** 73 * Get TimerProxy object that handles key repeat and long press timer event for this 74 * PointerTracker. 75 * @return the TimerProxy object that handles key repeat and long press timer event. 76 */ 77 public TimerProxy getTimerProxy(); 78 } 79 80 public interface DrawingProxy extends MoreKeysPanel.Controller { 81 public void invalidateKey(Key key); 82 public void showKeyPreview(PointerTracker tracker); 83 public void dismissKeyPreview(PointerTracker tracker); 84 public void showSlidingKeyInputPreview(PointerTracker tracker); 85 public void dismissSlidingKeyInputPreview(); 86 public void showGesturePreviewTrail(PointerTracker tracker, boolean isOldestTracker); 87 } 88 89 public interface TimerProxy { 90 public void startTypingStateTimer(Key typedKey); 91 public boolean isTypingState(); 92 public void startKeyRepeatTimer(PointerTracker tracker); 93 public void startLongPressTimer(PointerTracker tracker); 94 public void startLongPressTimer(int code); 95 public void cancelLongPressTimer(); 96 public void startDoubleTapTimer(); 97 public void cancelDoubleTapTimer(); 98 public boolean isInDoubleTapTimeout(); 99 public void cancelKeyTimers(); 100 public void startUpdateBatchInputTimer(PointerTracker tracker); 101 public void cancelAllUpdateBatchInputTimers(); 102 103 public static class Adapter implements TimerProxy { 104 @Override 105 public void startTypingStateTimer(Key typedKey) {} 106 @Override 107 public boolean isTypingState() { return false; } 108 @Override 109 public void startKeyRepeatTimer(PointerTracker tracker) {} 110 @Override 111 public void startLongPressTimer(PointerTracker tracker) {} 112 @Override 113 public void startLongPressTimer(int code) {} 114 @Override 115 public void cancelLongPressTimer() {} 116 @Override 117 public void startDoubleTapTimer() {} 118 @Override 119 public void cancelDoubleTapTimer() {} 120 @Override 121 public boolean isInDoubleTapTimeout() { return false; } 122 @Override 123 public void cancelKeyTimers() {} 124 @Override 125 public void startUpdateBatchInputTimer(PointerTracker tracker) {} 126 @Override 127 public void cancelAllUpdateBatchInputTimers() {} 128 } 129 } 130 131 static final class PointerTrackerParams { 132 public final boolean mSlidingKeyInputEnabled; 133 public final int mTouchNoiseThresholdTime; 134 public final int mTouchNoiseThresholdDistance; 135 public final int mSuppressKeyPreviewAfterBatchInputDuration; 136 137 public static final PointerTrackerParams DEFAULT = new PointerTrackerParams(); 138 139 private PointerTrackerParams() { 140 mSlidingKeyInputEnabled = false; 141 mTouchNoiseThresholdTime = 0; 142 mTouchNoiseThresholdDistance = 0; 143 mSuppressKeyPreviewAfterBatchInputDuration = 0; 144 } 145 146 public PointerTrackerParams(final TypedArray mainKeyboardViewAttr) { 147 mSlidingKeyInputEnabled = mainKeyboardViewAttr.getBoolean( 148 R.styleable.MainKeyboardView_slidingKeyInputEnable, false); 149 mTouchNoiseThresholdTime = mainKeyboardViewAttr.getInt( 150 R.styleable.MainKeyboardView_touchNoiseThresholdTime, 0); 151 mTouchNoiseThresholdDistance = mainKeyboardViewAttr.getDimensionPixelSize( 152 R.styleable.MainKeyboardView_touchNoiseThresholdDistance, 0); 153 mSuppressKeyPreviewAfterBatchInputDuration = mainKeyboardViewAttr.getInt( 154 R.styleable.MainKeyboardView_suppressKeyPreviewAfterBatchInputDuration, 0); 155 } 156 } 157 158 // Parameters for pointer handling. 159 private static PointerTrackerParams sParams; 160 private static GestureStrokeParams sGestureStrokeParams; 161 private static boolean sNeedsPhantomSuddenMoveEventHack; 162 // Move this threshold to resource. 163 // TODO: Device specific parameter would be better for device specific hack? 164 private static final float PHANTOM_SUDDEN_MOVE_THRESHOLD = 0.25f; // in keyWidth 165 // This hack might be device specific. 166 private static final boolean sNeedsProximateBogusDownMoveUpEventHack = true; 167 168 private static final ArrayList<PointerTracker> sTrackers = CollectionUtils.newArrayList(); 169 private static final PointerTrackerQueue sPointerTrackerQueue = new PointerTrackerQueue(); 170 171 public final int mPointerId; 172 173 private DrawingProxy mDrawingProxy; 174 private TimerProxy mTimerProxy; 175 private KeyDetector mKeyDetector; 176 private KeyboardActionListener mListener = EMPTY_LISTENER; 177 178 private Keyboard mKeyboard; 179 private int mPhantonSuddenMoveThreshold; 180 private final BogusMoveEventDetector mBogusMoveEventDetector = new BogusMoveEventDetector(); 181 182 private boolean mIsDetectingGesture = false; // per PointerTracker. 183 private static boolean sInGesture = false; 184 private static long sGestureFirstDownTime; 185 private static TimeRecorder sTimeRecorder; 186 private static final InputPointers sAggregratedPointers = new InputPointers( 187 GestureStroke.DEFAULT_CAPACITY); 188 private static int sLastRecognitionPointSize = 0; // synchronized using sAggregratedPointers 189 private static long sLastRecognitionTime = 0; // synchronized using sAggregratedPointers 190 191 static final class BogusMoveEventDetector { 192 // Move these thresholds to resource. 193 // These thresholds' unit is a diagonal length of a key. 194 private static final float BOGUS_MOVE_ACCUMULATED_DISTANCE_THRESHOLD = 0.53f; 195 private static final float BOGUS_MOVE_RADIUS_THRESHOLD = 1.14f; 196 197 private int mAccumulatedDistanceThreshold; 198 private int mRadiusThreshold; 199 200 // Accumulated distance from actual and artificial down keys. 201 /* package */ int mAccumulatedDistanceFromDownKey; 202 private int mActualDownX; 203 private int mActualDownY; 204 205 public void setKeyboardGeometry(final int keyWidth, final int keyHeight) { 206 final float keyDiagonal = (float)Math.hypot(keyWidth, keyHeight); 207 mAccumulatedDistanceThreshold = (int)( 208 keyDiagonal * BOGUS_MOVE_ACCUMULATED_DISTANCE_THRESHOLD); 209 mRadiusThreshold = (int)(keyDiagonal * BOGUS_MOVE_RADIUS_THRESHOLD); 210 } 211 212 public void onActualDownEvent(final int x, final int y) { 213 mActualDownX = x; 214 mActualDownY = y; 215 } 216 217 public void onDownKey() { 218 mAccumulatedDistanceFromDownKey = 0; 219 } 220 221 public void onMoveKey(final int distance) { 222 mAccumulatedDistanceFromDownKey += distance; 223 } 224 225 public boolean hasTraveledLongDistance(final int x, final int y) { 226 final int dx = Math.abs(x - mActualDownX); 227 final int dy = Math.abs(y - mActualDownY); 228 // A bogus move event should be a horizontal movement. A vertical movement might be 229 // a sloppy typing and should be ignored. 230 return dx >= dy && mAccumulatedDistanceFromDownKey >= mAccumulatedDistanceThreshold; 231 } 232 233 /* package */ int getDistanceFromDownEvent(final int x, final int y) { 234 return getDistance(x, y, mActualDownX, mActualDownY); 235 } 236 237 public boolean isCloseToActualDownEvent(final int x, final int y) { 238 return getDistanceFromDownEvent(x, y) < mRadiusThreshold; 239 } 240 } 241 242 static final class TimeRecorder { 243 private final int mSuppressKeyPreviewAfterBatchInputDuration; 244 private final int mStaticTimeThresholdAfterFastTyping; // msec 245 private long mLastTypingTime; 246 private long mLastLetterTypingTime; 247 private long mLastBatchInputTime; 248 249 public TimeRecorder(final PointerTrackerParams pointerTrackerParams, 250 final GestureStrokeParams gestureStrokeParams) { 251 mSuppressKeyPreviewAfterBatchInputDuration = 252 pointerTrackerParams.mSuppressKeyPreviewAfterBatchInputDuration; 253 mStaticTimeThresholdAfterFastTyping = 254 gestureStrokeParams.mStaticTimeThresholdAfterFastTyping; 255 } 256 257 public boolean isInFastTyping(final long eventTime) { 258 final long elapsedTimeSinceLastLetterTyping = eventTime - mLastLetterTypingTime; 259 return elapsedTimeSinceLastLetterTyping < mStaticTimeThresholdAfterFastTyping; 260 } 261 262 private boolean wasLastInputTyping() { 263 return mLastTypingTime >= mLastBatchInputTime; 264 } 265 266 public void onCodeInput(final int code, final long eventTime) { 267 // Record the letter typing time when 268 // 1. Letter keys are typed successively without any batch input in between. 269 // 2. A letter key is typed within the threshold time since the last any key typing. 270 // 3. A non-letter key is typed within the threshold time since the last letter key 271 // typing. 272 if (Character.isLetter(code)) { 273 if (wasLastInputTyping() 274 || eventTime - mLastTypingTime < mStaticTimeThresholdAfterFastTyping) { 275 mLastLetterTypingTime = eventTime; 276 } 277 } else { 278 if (eventTime - mLastLetterTypingTime < mStaticTimeThresholdAfterFastTyping) { 279 // This non-letter typing should be treated as a part of fast typing. 280 mLastLetterTypingTime = eventTime; 281 } 282 } 283 mLastTypingTime = eventTime; 284 } 285 286 public void onEndBatchInput(final long eventTime) { 287 mLastBatchInputTime = eventTime; 288 } 289 290 public long getLastLetterTypingTime() { 291 return mLastLetterTypingTime; 292 } 293 294 public boolean needsToSuppressKeyPreviewPopup(final long eventTime) { 295 return !wasLastInputTyping() 296 && eventTime - mLastBatchInputTime < mSuppressKeyPreviewAfterBatchInputDuration; 297 } 298 } 299 300 // The position and time at which first down event occurred. 301 private long mDownTime; 302 private int[] mDownCoordinates = CoordinateUtils.newInstance(); 303 private long mUpTime; 304 305 // The current key where this pointer is. 306 private Key mCurrentKey = null; 307 // The position where the current key was recognized for the first time. 308 private int mKeyX; 309 private int mKeyY; 310 311 // Last pointer position. 312 private int mLastX; 313 private int mLastY; 314 315 // true if keyboard layout has been changed. 316 private boolean mKeyboardLayoutHasBeenChanged; 317 318 // true if this pointer is no longer tracking touch event. 319 private boolean mIsTrackingCanceled; 320 321 // true if this pointer has been long-pressed and is showing a more keys panel. 322 private boolean mIsShowingMoreKeysPanel; 323 324 // true if this pointer is in a sliding key input. 325 boolean mIsInSlidingKeyInput; 326 // true if this pointer is in a sliding key input from a modifier key, 327 // so that further modifier keys should be ignored. 328 boolean mIsInSlidingKeyInputFromModifier; 329 330 // true if a sliding key input is allowed. 331 private boolean mIsAllowedSlidingKeyInput; 332 333 // Empty {@link KeyboardActionListener} 334 private static final KeyboardActionListener EMPTY_LISTENER = 335 new KeyboardActionListener.Adapter(); 336 337 private final GestureStrokeWithPreviewPoints mGestureStrokeWithPreviewPoints; 338 339 public static void init(final boolean needsPhantomSuddenMoveEventHack) { 340 sNeedsPhantomSuddenMoveEventHack = needsPhantomSuddenMoveEventHack; 341 sParams = PointerTrackerParams.DEFAULT; 342 sGestureStrokeParams = GestureStrokeParams.DEFAULT; 343 sTimeRecorder = new TimeRecorder(sParams, sGestureStrokeParams); 344 } 345 346 public static void setParameters(final TypedArray mainKeyboardViewAttr) { 347 sParams = new PointerTrackerParams(mainKeyboardViewAttr); 348 sGestureStrokeParams = new GestureStrokeParams(mainKeyboardViewAttr); 349 sTimeRecorder = new TimeRecorder(sParams, sGestureStrokeParams); 350 } 351 352 private static void updateGestureHandlingMode() { 353 sShouldHandleGesture = sMainDictionaryAvailable 354 && sGestureHandlingEnabledByInputField 355 && sGestureHandlingEnabledByUser 356 && !AccessibilityUtils.getInstance().isTouchExplorationEnabled(); 357 } 358 359 // Note that this method is called from a non-UI thread. 360 public static void setMainDictionaryAvailability(final boolean mainDictionaryAvailable) { 361 sMainDictionaryAvailable = mainDictionaryAvailable; 362 updateGestureHandlingMode(); 363 } 364 365 public static void setGestureHandlingEnabledByUser(final boolean gestureHandlingEnabledByUser) { 366 sGestureHandlingEnabledByUser = gestureHandlingEnabledByUser; 367 updateGestureHandlingMode(); 368 } 369 370 public static PointerTracker getPointerTracker(final int id, final KeyEventHandler handler) { 371 final ArrayList<PointerTracker> trackers = sTrackers; 372 373 // Create pointer trackers until we can get 'id+1'-th tracker, if needed. 374 for (int i = trackers.size(); i <= id; i++) { 375 final PointerTracker tracker = new PointerTracker(i, handler); 376 trackers.add(tracker); 377 } 378 379 return trackers.get(id); 380 } 381 382 public static boolean isAnyInSlidingKeyInput() { 383 return sPointerTrackerQueue.isAnyInSlidingKeyInput(); 384 } 385 386 public static void setKeyboardActionListener(final KeyboardActionListener listener) { 387 final int trackersSize = sTrackers.size(); 388 for (int i = 0; i < trackersSize; ++i) { 389 final PointerTracker tracker = sTrackers.get(i); 390 tracker.mListener = listener; 391 } 392 } 393 394 public static void setKeyDetector(final KeyDetector keyDetector) { 395 final int trackersSize = sTrackers.size(); 396 for (int i = 0; i < trackersSize; ++i) { 397 final PointerTracker tracker = sTrackers.get(i); 398 tracker.setKeyDetectorInner(keyDetector); 399 // Mark that keyboard layout has been changed. 400 tracker.mKeyboardLayoutHasBeenChanged = true; 401 } 402 final Keyboard keyboard = keyDetector.getKeyboard(); 403 sGestureHandlingEnabledByInputField = !keyboard.mId.passwordInput(); 404 updateGestureHandlingMode(); 405 } 406 407 public static void setReleasedKeyGraphicsToAllKeys() { 408 final int trackersSize = sTrackers.size(); 409 for (int i = 0; i < trackersSize; ++i) { 410 final PointerTracker tracker = sTrackers.get(i); 411 tracker.setReleasedKeyGraphics(tracker.mCurrentKey); 412 } 413 } 414 415 private PointerTracker(final int id, final KeyEventHandler handler) { 416 if (handler == null) { 417 throw new NullPointerException(); 418 } 419 mPointerId = id; 420 mGestureStrokeWithPreviewPoints = new GestureStrokeWithPreviewPoints( 421 id, sGestureStrokeParams); 422 setKeyDetectorInner(handler.getKeyDetector()); 423 mListener = handler.getKeyboardActionListener(); 424 mDrawingProxy = handler.getDrawingProxy(); 425 mTimerProxy = handler.getTimerProxy(); 426 } 427 428 // Returns true if keyboard has been changed by this callback. 429 private boolean callListenerOnPressAndCheckKeyboardLayoutChange(final Key key) { 430 if (sInGesture) { 431 return false; 432 } 433 final boolean ignoreModifierKey = mIsInSlidingKeyInputFromModifier && key.isModifier(); 434 if (DEBUG_LISTENER) { 435 Log.d(TAG, String.format("[%d] onPress : %s%s%s", mPointerId, 436 KeyDetector.printableCode(key), 437 ignoreModifierKey ? " ignoreModifier" : "", 438 key.isEnabled() ? "" : " disabled")); 439 } 440 if (ignoreModifierKey) { 441 return false; 442 } 443 if (key.isEnabled()) { 444 mListener.onPressKey(key.mCode); 445 final boolean keyboardLayoutHasBeenChanged = mKeyboardLayoutHasBeenChanged; 446 mKeyboardLayoutHasBeenChanged = false; 447 mTimerProxy.startTypingStateTimer(key); 448 return keyboardLayoutHasBeenChanged; 449 } 450 return false; 451 } 452 453 // Note that we need primaryCode argument because the keyboard may in shifted state and the 454 // primaryCode is different from {@link Key#mCode}. 455 private void callListenerOnCodeInput(final Key key, final int primaryCode, final int x, 456 final int y, final long eventTime) { 457 final boolean ignoreModifierKey = mIsInSlidingKeyInputFromModifier && key.isModifier(); 458 final boolean altersCode = key.altCodeWhileTyping() && mTimerProxy.isTypingState(); 459 final int code = altersCode ? key.getAltCode() : primaryCode; 460 if (DEBUG_LISTENER) { 461 final String output = code == Constants.CODE_OUTPUT_TEXT 462 ? key.getOutputText() : Constants.printableCode(code); 463 Log.d(TAG, String.format("[%d] onCodeInput: %4d %4d %s%s%s", mPointerId, x, y, 464 output, ignoreModifierKey ? " ignoreModifier" : "", 465 altersCode ? " altersCode" : "", key.isEnabled() ? "" : " disabled")); 466 } 467 if (ProductionFlag.IS_EXPERIMENTAL) { 468 ResearchLogger.pointerTracker_callListenerOnCodeInput(key, x, y, ignoreModifierKey, 469 altersCode, code); 470 } 471 if (ignoreModifierKey) { 472 return; 473 } 474 // Even if the key is disabled, it should respond if it is in the altCodeWhileTyping state. 475 if (key.isEnabled() || altersCode) { 476 sTimeRecorder.onCodeInput(code, eventTime); 477 if (code == Constants.CODE_OUTPUT_TEXT) { 478 mListener.onTextInput(key.getOutputText()); 479 } else if (code != Constants.CODE_UNSPECIFIED) { 480 mListener.onCodeInput(code, x, y); 481 } 482 } 483 } 484 485 // Note that we need primaryCode argument because the keyboard may be in shifted state and the 486 // primaryCode is different from {@link Key#mCode}. 487 private void callListenerOnRelease(final Key key, final int primaryCode, 488 final boolean withSliding) { 489 if (sInGesture) { 490 return; 491 } 492 final boolean ignoreModifierKey = mIsInSlidingKeyInputFromModifier && key.isModifier(); 493 if (DEBUG_LISTENER) { 494 Log.d(TAG, String.format("[%d] onRelease : %s%s%s%s", mPointerId, 495 Constants.printableCode(primaryCode), 496 withSliding ? " sliding" : "", ignoreModifierKey ? " ignoreModifier" : "", 497 key.isEnabled() ? "": " disabled")); 498 } 499 if (ProductionFlag.IS_EXPERIMENTAL) { 500 ResearchLogger.pointerTracker_callListenerOnRelease(key, primaryCode, withSliding, 501 ignoreModifierKey); 502 } 503 if (ignoreModifierKey) { 504 return; 505 } 506 if (key.isEnabled()) { 507 mListener.onReleaseKey(primaryCode, withSliding); 508 } 509 } 510 511 private void callListenerOnCancelInput() { 512 if (DEBUG_LISTENER) { 513 Log.d(TAG, String.format("[%d] onCancelInput", mPointerId)); 514 } 515 if (ProductionFlag.IS_EXPERIMENTAL) { 516 ResearchLogger.pointerTracker_callListenerOnCancelInput(); 517 } 518 mListener.onCancelInput(); 519 } 520 521 private void setKeyDetectorInner(final KeyDetector keyDetector) { 522 final Keyboard keyboard = keyDetector.getKeyboard(); 523 if (keyDetector == mKeyDetector && keyboard == mKeyboard) { 524 return; 525 } 526 mKeyDetector = keyDetector; 527 mKeyboard = keyDetector.getKeyboard(); 528 final int keyWidth = mKeyboard.mMostCommonKeyWidth; 529 final int keyHeight = mKeyboard.mMostCommonKeyHeight; 530 mGestureStrokeWithPreviewPoints.setKeyboardGeometry(keyWidth, mKeyboard.mOccupiedHeight); 531 final Key newKey = mKeyDetector.detectHitKey(mKeyX, mKeyY); 532 if (newKey != mCurrentKey) { 533 if (mDrawingProxy != null) { 534 setReleasedKeyGraphics(mCurrentKey); 535 } 536 // Keep {@link #mCurrentKey} that comes from previous keyboard. 537 } 538 mPhantonSuddenMoveThreshold = (int)(keyWidth * PHANTOM_SUDDEN_MOVE_THRESHOLD); 539 mBogusMoveEventDetector.setKeyboardGeometry(keyWidth, keyHeight); 540 } 541 542 @Override 543 public boolean isInSlidingKeyInput() { 544 return mIsInSlidingKeyInput; 545 } 546 547 public boolean isInSlidingKeyInputFromModifier() { 548 return mIsInSlidingKeyInputFromModifier; 549 } 550 551 public Key getKey() { 552 return mCurrentKey; 553 } 554 555 @Override 556 public boolean isModifier() { 557 return mCurrentKey != null && mCurrentKey.isModifier(); 558 } 559 560 public Key getKeyOn(final int x, final int y) { 561 return mKeyDetector.detectHitKey(x, y); 562 } 563 564 private void setReleasedKeyGraphics(final Key key) { 565 mDrawingProxy.dismissKeyPreview(this); 566 if (key == null) { 567 return; 568 } 569 570 // Even if the key is disabled, update the key release graphics just in case. 571 updateReleaseKeyGraphics(key); 572 573 if (key.isShift()) { 574 for (final Key shiftKey : mKeyboard.mShiftKeys) { 575 if (shiftKey != key) { 576 updateReleaseKeyGraphics(shiftKey); 577 } 578 } 579 } 580 581 if (key.altCodeWhileTyping()) { 582 final int altCode = key.getAltCode(); 583 final Key altKey = mKeyboard.getKey(altCode); 584 if (altKey != null) { 585 updateReleaseKeyGraphics(altKey); 586 } 587 for (final Key k : mKeyboard.mAltCodeKeysWhileTyping) { 588 if (k != key && k.getAltCode() == altCode) { 589 updateReleaseKeyGraphics(k); 590 } 591 } 592 } 593 } 594 595 private static boolean needsToSuppressKeyPreviewPopup(final long eventTime) { 596 if (!sShouldHandleGesture) return false; 597 return sTimeRecorder.needsToSuppressKeyPreviewPopup(eventTime); 598 } 599 600 private void setPressedKeyGraphics(final Key key, final long eventTime) { 601 if (key == null) { 602 return; 603 } 604 605 // Even if the key is disabled, it should respond if it is in the altCodeWhileTyping state. 606 final boolean altersCode = key.altCodeWhileTyping() && mTimerProxy.isTypingState(); 607 final boolean needsToUpdateGraphics = key.isEnabled() || altersCode; 608 if (!needsToUpdateGraphics) { 609 return; 610 } 611 612 if (!key.noKeyPreview() && !sInGesture && !needsToSuppressKeyPreviewPopup(eventTime)) { 613 mDrawingProxy.showKeyPreview(this); 614 } 615 updatePressKeyGraphics(key); 616 617 if (key.isShift()) { 618 for (final Key shiftKey : mKeyboard.mShiftKeys) { 619 if (shiftKey != key) { 620 updatePressKeyGraphics(shiftKey); 621 } 622 } 623 } 624 625 if (key.altCodeWhileTyping() && mTimerProxy.isTypingState()) { 626 final int altCode = key.getAltCode(); 627 final Key altKey = mKeyboard.getKey(altCode); 628 if (altKey != null) { 629 updatePressKeyGraphics(altKey); 630 } 631 for (final Key k : mKeyboard.mAltCodeKeysWhileTyping) { 632 if (k != key && k.getAltCode() == altCode) { 633 updatePressKeyGraphics(k); 634 } 635 } 636 } 637 } 638 639 private void updateReleaseKeyGraphics(final Key key) { 640 key.onReleased(); 641 mDrawingProxy.invalidateKey(key); 642 } 643 644 private void updatePressKeyGraphics(final Key key) { 645 key.onPressed(); 646 mDrawingProxy.invalidateKey(key); 647 } 648 649 public GestureStrokeWithPreviewPoints getGestureStrokeWithPreviewPoints() { 650 return mGestureStrokeWithPreviewPoints; 651 } 652 653 public void getLastCoordinates(final int[] outCoords) { 654 CoordinateUtils.set(outCoords, mLastX, mLastY); 655 } 656 657 public long getDownTime() { 658 return mDownTime; 659 } 660 661 public void getDownCoordinates(final int[] outCoords) { 662 CoordinateUtils.copy(outCoords, mDownCoordinates); 663 } 664 665 private Key onDownKey(final int x, final int y, final long eventTime) { 666 mDownTime = eventTime; 667 CoordinateUtils.set(mDownCoordinates, x, y); 668 mBogusMoveEventDetector.onDownKey(); 669 return onMoveToNewKey(onMoveKeyInternal(x, y), x, y); 670 } 671 672 static int getDistance(final int x1, final int y1, final int x2, final int y2) { 673 return (int)Math.hypot(x1 - x2, y1 - y2); 674 } 675 676 private Key onMoveKeyInternal(final int x, final int y) { 677 mBogusMoveEventDetector.onMoveKey(getDistance(x, y, mLastX, mLastY)); 678 mLastX = x; 679 mLastY = y; 680 return mKeyDetector.detectHitKey(x, y); 681 } 682 683 private Key onMoveKey(final int x, final int y) { 684 return onMoveKeyInternal(x, y); 685 } 686 687 private Key onMoveToNewKey(final Key newKey, final int x, final int y) { 688 mCurrentKey = newKey; 689 mKeyX = x; 690 mKeyY = y; 691 return newKey; 692 } 693 694 private static int getActivePointerTrackerCount() { 695 return sPointerTrackerQueue.size(); 696 } 697 698 private static boolean isOldestTrackerInQueue(final PointerTracker tracker) { 699 return sPointerTrackerQueue.getOldestElement() == tracker; 700 } 701 702 private void mayStartBatchInput(final Key key) { 703 if (sInGesture || !mGestureStrokeWithPreviewPoints.isStartOfAGesture()) { 704 return; 705 } 706 if (key == null || !Character.isLetter(key.mCode)) { 707 return; 708 } 709 if (DEBUG_LISTENER) { 710 Log.d(TAG, String.format("[%d] onStartBatchInput", mPointerId)); 711 } 712 sInGesture = true; 713 synchronized (sAggregratedPointers) { 714 sAggregratedPointers.reset(); 715 sLastRecognitionPointSize = 0; 716 sLastRecognitionTime = 0; 717 mListener.onStartBatchInput(); 718 } 719 mTimerProxy.cancelLongPressTimer(); 720 mDrawingProxy.showGesturePreviewTrail(this, isOldestTrackerInQueue(this)); 721 } 722 723 public void updateBatchInputByTimer(final long eventTime) { 724 final int gestureTime = (int)(eventTime - sGestureFirstDownTime); 725 mGestureStrokeWithPreviewPoints.duplicateLastPointWith(gestureTime); 726 updateBatchInput(eventTime); 727 } 728 729 private void mayUpdateBatchInput(final long eventTime, final Key key) { 730 if (key != null) { 731 updateBatchInput(eventTime); 732 } 733 if (mIsTrackingCanceled) { 734 return; 735 } 736 mDrawingProxy.showGesturePreviewTrail(this, isOldestTrackerInQueue(this)); 737 } 738 739 private void updateBatchInput(final long eventTime) { 740 synchronized (sAggregratedPointers) { 741 final GestureStroke stroke = mGestureStrokeWithPreviewPoints; 742 stroke.appendIncrementalBatchPoints(sAggregratedPointers); 743 final int size = sAggregratedPointers.getPointerSize(); 744 if (size > sLastRecognitionPointSize 745 && stroke.hasRecognitionTimePast(eventTime, sLastRecognitionTime)) { 746 sLastRecognitionPointSize = size; 747 sLastRecognitionTime = eventTime; 748 if (DEBUG_LISTENER) { 749 Log.d(TAG, String.format("[%d] onUpdateBatchInput: batchPoints=%d", mPointerId, 750 size)); 751 } 752 mTimerProxy.startUpdateBatchInputTimer(this); 753 mListener.onUpdateBatchInput(sAggregratedPointers); 754 } 755 } 756 } 757 758 private void mayEndBatchInput(final long eventTime) { 759 synchronized (sAggregratedPointers) { 760 mGestureStrokeWithPreviewPoints.appendAllBatchPoints(sAggregratedPointers); 761 if (getActivePointerTrackerCount() == 1) { 762 sInGesture = false; 763 sTimeRecorder.onEndBatchInput(eventTime); 764 mTimerProxy.cancelAllUpdateBatchInputTimers(); 765 if (!mIsTrackingCanceled) { 766 if (DEBUG_LISTENER) { 767 Log.d(TAG, String.format("[%d] onEndBatchInput : batchPoints=%d", 768 mPointerId, sAggregratedPointers.getPointerSize())); 769 } 770 mListener.onEndBatchInput(sAggregratedPointers); 771 } 772 } 773 } 774 if (mIsTrackingCanceled) { 775 return; 776 } 777 mDrawingProxy.showGesturePreviewTrail(this, isOldestTrackerInQueue(this)); 778 } 779 780 private void cancelBatchInput() { 781 sPointerTrackerQueue.cancelAllPointerTracker(); 782 sInGesture = false; 783 if (DEBUG_LISTENER) { 784 Log.d(TAG, String.format("[%d] onCancelBatchInput", mPointerId)); 785 } 786 mListener.onCancelBatchInput(); 787 } 788 789 public void processMotionEvent(final int action, final int x, final int y, final long eventTime, 790 final KeyEventHandler handler) { 791 switch (action) { 792 case MotionEvent.ACTION_DOWN: 793 case MotionEvent.ACTION_POINTER_DOWN: 794 onDownEvent(x, y, eventTime, handler); 795 break; 796 case MotionEvent.ACTION_UP: 797 case MotionEvent.ACTION_POINTER_UP: 798 onUpEvent(x, y, eventTime); 799 break; 800 case MotionEvent.ACTION_MOVE: 801 onMoveEvent(x, y, eventTime, null); 802 break; 803 case MotionEvent.ACTION_CANCEL: 804 onCancelEvent(x, y, eventTime); 805 break; 806 } 807 } 808 809 public void onDownEvent(final int x, final int y, final long eventTime, 810 final KeyEventHandler handler) { 811 if (DEBUG_EVENT) { 812 printTouchEvent("onDownEvent:", x, y, eventTime); 813 } 814 815 mDrawingProxy = handler.getDrawingProxy(); 816 mTimerProxy = handler.getTimerProxy(); 817 setKeyboardActionListener(handler.getKeyboardActionListener()); 818 setKeyDetectorInner(handler.getKeyDetector()); 819 // Naive up-to-down noise filter. 820 final long deltaT = eventTime - mUpTime; 821 if (deltaT < sParams.mTouchNoiseThresholdTime) { 822 final int distance = getDistance(x, y, mLastX, mLastY); 823 if (distance < sParams.mTouchNoiseThresholdDistance) { 824 if (DEBUG_MODE) 825 Log.w(TAG, String.format("[%d] onDownEvent:" 826 + " ignore potential noise: time=%d distance=%d", 827 mPointerId, deltaT, distance)); 828 if (ProductionFlag.IS_EXPERIMENTAL) { 829 ResearchLogger.pointerTracker_onDownEvent(deltaT, distance * distance); 830 } 831 cancelTracking(); 832 return; 833 } 834 } 835 836 final Key key = getKeyOn(x, y); 837 mBogusMoveEventDetector.onActualDownEvent(x, y); 838 if (key != null && key.isModifier()) { 839 // Before processing a down event of modifier key, all pointers already being 840 // tracked should be released. 841 sPointerTrackerQueue.releaseAllPointers(eventTime); 842 } 843 sPointerTrackerQueue.add(this); 844 onDownEventInternal(x, y, eventTime); 845 if (!sShouldHandleGesture) { 846 return; 847 } 848 // A gesture should start only from a non-modifier key. 849 mIsDetectingGesture = (mKeyboard != null) && mKeyboard.mId.isAlphabetKeyboard() 850 && !mIsShowingMoreKeysPanel && key != null && !key.isModifier(); 851 if (mIsDetectingGesture) { 852 if (getActivePointerTrackerCount() == 1) { 853 sGestureFirstDownTime = eventTime; 854 } 855 mGestureStrokeWithPreviewPoints.onDownEvent(x, y, eventTime, sGestureFirstDownTime, 856 sTimeRecorder.getLastLetterTypingTime()); 857 } 858 } 859 860 private void onDownEventInternal(final int x, final int y, final long eventTime) { 861 Key key = onDownKey(x, y, eventTime); 862 // Sliding key is allowed when 1) enabled by configuration, 2) this pointer starts sliding 863 // from modifier key, or 3) this pointer's KeyDetector always allows sliding input. 864 mIsAllowedSlidingKeyInput = sParams.mSlidingKeyInputEnabled 865 || (key != null && key.isModifier()) 866 || mKeyDetector.alwaysAllowsSlidingInput(); 867 mKeyboardLayoutHasBeenChanged = false; 868 mIsTrackingCanceled = false; 869 resetSlidingKeyInput(); 870 if (key != null) { 871 // This onPress call may have changed keyboard layout. Those cases are detected at 872 // {@link #setKeyboard}. In those cases, we should update key according to the new 873 // keyboard layout. 874 if (callListenerOnPressAndCheckKeyboardLayoutChange(key)) { 875 key = onDownKey(x, y, eventTime); 876 } 877 878 startRepeatKey(key); 879 startLongPressTimer(key); 880 setPressedKeyGraphics(key, eventTime); 881 } 882 } 883 884 private void startSlidingKeyInput(final Key key) { 885 if (!mIsInSlidingKeyInput) { 886 mIsInSlidingKeyInputFromModifier = key.isModifier(); 887 } 888 mIsInSlidingKeyInput = true; 889 } 890 891 private void resetSlidingKeyInput() { 892 mIsInSlidingKeyInput = false; 893 mIsInSlidingKeyInputFromModifier = false; 894 mDrawingProxy.dismissSlidingKeyInputPreview(); 895 } 896 897 private void onGestureMoveEvent(final int x, final int y, final long eventTime, 898 final boolean isMajorEvent, final Key key) { 899 final int gestureTime = (int)(eventTime - sGestureFirstDownTime); 900 if (mIsDetectingGesture) { 901 final boolean onValidArea = mGestureStrokeWithPreviewPoints.addPointOnKeyboard( 902 x, y, gestureTime, isMajorEvent); 903 if (!onValidArea) { 904 cancelBatchInput(); 905 return; 906 } 907 mayStartBatchInput(key); 908 if (sInGesture) { 909 mayUpdateBatchInput(eventTime, key); 910 } 911 } 912 } 913 914 public void onMoveEvent(final int x, final int y, final long eventTime, final MotionEvent me) { 915 if (DEBUG_MOVE_EVENT) { 916 printTouchEvent("onMoveEvent:", x, y, eventTime); 917 } 918 if (mIsTrackingCanceled) { 919 return; 920 } 921 922 if (sShouldHandleGesture && me != null) { 923 // Add historical points to gesture path. 924 final int pointerIndex = me.findPointerIndex(mPointerId); 925 final int historicalSize = me.getHistorySize(); 926 for (int h = 0; h < historicalSize; h++) { 927 final int historicalX = (int)me.getHistoricalX(pointerIndex, h); 928 final int historicalY = (int)me.getHistoricalY(pointerIndex, h); 929 final long historicalTime = me.getHistoricalEventTime(h); 930 onGestureMoveEvent(historicalX, historicalY, historicalTime, 931 false /* isMajorEvent */, null); 932 } 933 } 934 935 onMoveEventInternal(x, y, eventTime); 936 } 937 938 private void processSlidingKeyInput(final Key newKey, final int x, final int y, 939 final long eventTime) { 940 // This onPress call may have changed keyboard layout. Those cases are detected 941 // at {@link #setKeyboard}. In those cases, we should update key according 942 // to the new keyboard layout. 943 Key key = newKey; 944 if (callListenerOnPressAndCheckKeyboardLayoutChange(key)) { 945 key = onMoveKey(x, y); 946 } 947 onMoveToNewKey(key, x, y); 948 startLongPressTimer(key); 949 setPressedKeyGraphics(key, eventTime); 950 } 951 952 private void processPhantomSuddenMoveHack(final Key key, final int x, final int y, 953 final long eventTime, final Key oldKey, final int lastX, final int lastY) { 954 if (DEBUG_MODE) { 955 Log.w(TAG, String.format("[%d] onMoveEvent:" 956 + " phantom sudden move event (distance=%d) is translated to " 957 + "up[%d,%d,%s]/down[%d,%d,%s] events", mPointerId, 958 getDistance(x, y, lastX, lastY), 959 lastX, lastY, Constants.printableCode(oldKey.mCode), 960 x, y, Constants.printableCode(key.mCode))); 961 } 962 // TODO: This should be moved to outside of this nested if-clause? 963 if (ProductionFlag.IS_EXPERIMENTAL) { 964 ResearchLogger.pointerTracker_onMoveEvent(x, y, lastX, lastY); 965 } 966 onUpEventInternal(eventTime); 967 onDownEventInternal(x, y, eventTime); 968 } 969 970 private void processProximateBogusDownMoveUpEventHack(final Key key, final int x, final int y, 971 final long eventTime, final Key oldKey, final int lastX, final int lastY) { 972 if (DEBUG_MODE) { 973 final float keyDiagonal = (float)Math.hypot( 974 mKeyboard.mMostCommonKeyWidth, mKeyboard.mMostCommonKeyHeight); 975 final float radiusRatio = 976 mBogusMoveEventDetector.getDistanceFromDownEvent(x, y) 977 / keyDiagonal; 978 Log.w(TAG, String.format("[%d] onMoveEvent:" 979 + " bogus down-move-up event (raidus=%.2f key diagonal) is " 980 + " translated to up[%d,%d,%s]/down[%d,%d,%s] events", 981 mPointerId, radiusRatio, 982 lastX, lastY, Constants.printableCode(oldKey.mCode), 983 x, y, Constants.printableCode(key.mCode))); 984 } 985 onUpEventInternal(eventTime); 986 onDownEventInternal(x, y, eventTime); 987 } 988 989 private void processSildeOutFromOldKey(final Key oldKey) { 990 setReleasedKeyGraphics(oldKey); 991 callListenerOnRelease(oldKey, oldKey.mCode, true); 992 startSlidingKeyInput(oldKey); 993 mTimerProxy.cancelKeyTimers(); 994 } 995 996 private void slideFromOldKeyToNewKey(final Key key, final int x, final int y, 997 final long eventTime, final Key oldKey, final int lastX, final int lastY) { 998 // The pointer has been slid in to the new key from the previous key, we must call 999 // onRelease() first to notify that the previous key has been released, then call 1000 // onPress() to notify that the new key is being pressed. 1001 processSildeOutFromOldKey(oldKey); 1002 startRepeatKey(key); 1003 if (mIsAllowedSlidingKeyInput) { 1004 processSlidingKeyInput(key, x, y, eventTime); 1005 } 1006 // HACK: On some devices, quick successive touches may be reported as a sudden move by 1007 // touch panel firmware. This hack detects such cases and translates the move event to 1008 // successive up and down events. 1009 // TODO: Should find a way to balance gesture detection and this hack. 1010 else if (sNeedsPhantomSuddenMoveEventHack 1011 && getDistance(x, y, lastX, lastY) >= mPhantonSuddenMoveThreshold) { 1012 processPhantomSuddenMoveHack(key, x, y, eventTime, oldKey, lastX, lastY); 1013 } 1014 // HACK: On some devices, quick successive proximate touches may be reported as a bogus 1015 // down-move-up event by touch panel firmware. This hack detects such cases and breaks 1016 // these events into separate up and down events. 1017 else if (sNeedsProximateBogusDownMoveUpEventHack && sTimeRecorder.isInFastTyping(eventTime) 1018 && mBogusMoveEventDetector.isCloseToActualDownEvent(x, y)) { 1019 processProximateBogusDownMoveUpEventHack(key, x, y, eventTime, oldKey, lastX, lastY); 1020 } 1021 // HACK: If there are currently multiple touches, register the key even if the finger 1022 // slides off the key. This defends against noise from some touch panels when there are 1023 // close multiple touches. 1024 // Caveat: When in chording input mode with a modifier key, we don't use this hack. 1025 else if (getActivePointerTrackerCount() > 1 1026 && !sPointerTrackerQueue.hasModifierKeyOlderThan(this)) { 1027 if (DEBUG_MODE) { 1028 Log.w(TAG, String.format("[%d] onMoveEvent:" 1029 + " detected sliding finger while multi touching", mPointerId)); 1030 } 1031 onUpEvent(x, y, eventTime); 1032 cancelTracking(); 1033 setReleasedKeyGraphics(oldKey); 1034 } else { 1035 if (!mIsDetectingGesture) { 1036 cancelTracking(); 1037 } 1038 setReleasedKeyGraphics(oldKey); 1039 } 1040 } 1041 1042 private void slideOutFromOldKey(final Key oldKey, final int x, final int y) { 1043 // The pointer has been slid out from the previous key, we must call onRelease() to 1044 // notify that the previous key has been released. 1045 processSildeOutFromOldKey(oldKey); 1046 if (mIsAllowedSlidingKeyInput) { 1047 onMoveToNewKey(null, x, y); 1048 } else { 1049 if (!mIsDetectingGesture) { 1050 cancelTracking(); 1051 } 1052 } 1053 } 1054 1055 private void onMoveEventInternal(final int x, final int y, final long eventTime) { 1056 final int lastX = mLastX; 1057 final int lastY = mLastY; 1058 final Key oldKey = mCurrentKey; 1059 final Key newKey = onMoveKey(x, y); 1060 1061 if (sShouldHandleGesture) { 1062 // Register move event on gesture tracker. 1063 onGestureMoveEvent(x, y, eventTime, true /* isMajorEvent */, newKey); 1064 if (sInGesture) { 1065 mCurrentKey = null; 1066 setReleasedKeyGraphics(oldKey); 1067 return; 1068 } 1069 } 1070 1071 if (newKey != null) { 1072 if (oldKey != null && isMajorEnoughMoveToBeOnNewKey(x, y, eventTime, newKey)) { 1073 slideFromOldKeyToNewKey(newKey, x, y, eventTime, oldKey, lastX, lastY); 1074 } else if (oldKey == null) { 1075 // The pointer has been slid in to the new key, but the finger was not on any keys. 1076 // In this case, we must call onPress() to notify that the new key is being pressed. 1077 processSlidingKeyInput(newKey, x, y, eventTime); 1078 } 1079 } else { // newKey == null 1080 if (oldKey != null && isMajorEnoughMoveToBeOnNewKey(x, y, eventTime, newKey)) { 1081 slideOutFromOldKey(oldKey, x, y); 1082 } 1083 } 1084 mDrawingProxy.showSlidingKeyInputPreview(this); 1085 } 1086 1087 public void onUpEvent(final int x, final int y, final long eventTime) { 1088 if (DEBUG_EVENT) { 1089 printTouchEvent("onUpEvent :", x, y, eventTime); 1090 } 1091 1092 if (!sInGesture) { 1093 if (mCurrentKey != null && mCurrentKey.isModifier()) { 1094 // Before processing an up event of modifier key, all pointers already being 1095 // tracked should be released. 1096 sPointerTrackerQueue.releaseAllPointersExcept(this, eventTime); 1097 } else { 1098 sPointerTrackerQueue.releaseAllPointersOlderThan(this, eventTime); 1099 } 1100 } 1101 onUpEventInternal(eventTime); 1102 sPointerTrackerQueue.remove(this); 1103 } 1104 1105 // Let this pointer tracker know that one of newer-than-this pointer trackers got an up event. 1106 // This pointer tracker needs to keep the key top graphics "pressed", but needs to get a 1107 // "virtual" up event. 1108 @Override 1109 public void onPhantomUpEvent(final long eventTime) { 1110 if (DEBUG_EVENT) { 1111 printTouchEvent("onPhntEvent:", mLastX, mLastY, eventTime); 1112 } 1113 onUpEventInternal(eventTime); 1114 cancelTracking(); 1115 } 1116 1117 private void onUpEventInternal(final long eventTime) { 1118 mTimerProxy.cancelKeyTimers(); 1119 resetSlidingKeyInput(); 1120 mIsDetectingGesture = false; 1121 final Key currentKey = mCurrentKey; 1122 mCurrentKey = null; 1123 // Release the last pressed key. 1124 setReleasedKeyGraphics(currentKey); 1125 if (mIsShowingMoreKeysPanel) { 1126 mDrawingProxy.dismissMoreKeysPanel(); 1127 mIsShowingMoreKeysPanel = false; 1128 } 1129 1130 if (sInGesture) { 1131 if (currentKey != null) { 1132 callListenerOnRelease(currentKey, currentKey.mCode, true); 1133 } 1134 mayEndBatchInput(eventTime); 1135 return; 1136 } 1137 1138 if (mIsTrackingCanceled) { 1139 return; 1140 } 1141 if (currentKey != null && !currentKey.isRepeatable()) { 1142 detectAndSendKey(currentKey, mKeyX, mKeyY, eventTime); 1143 } 1144 } 1145 1146 public void onShowMoreKeysPanel(final int x, final int y, final KeyEventHandler handler) { 1147 onLongPressed(); 1148 mIsShowingMoreKeysPanel = true; 1149 onDownEvent(x, y, SystemClock.uptimeMillis(), handler); 1150 } 1151 1152 @Override 1153 public void cancelTracking() { 1154 mIsTrackingCanceled = true; 1155 } 1156 1157 public void onLongPressed() { 1158 resetSlidingKeyInput(); 1159 cancelTracking(); 1160 setReleasedKeyGraphics(mCurrentKey); 1161 sPointerTrackerQueue.remove(this); 1162 } 1163 1164 public void onCancelEvent(final int x, final int y, final long eventTime) { 1165 if (DEBUG_EVENT) { 1166 printTouchEvent("onCancelEvt:", x, y, eventTime); 1167 } 1168 1169 if (sInGesture) { 1170 cancelBatchInput(); 1171 } 1172 sPointerTrackerQueue.cancelAllPointerTracker(); 1173 sPointerTrackerQueue.releaseAllPointers(eventTime); 1174 onCancelEventInternal(); 1175 } 1176 1177 private void onCancelEventInternal() { 1178 mTimerProxy.cancelKeyTimers(); 1179 setReleasedKeyGraphics(mCurrentKey); 1180 resetSlidingKeyInput(); 1181 if (mIsShowingMoreKeysPanel) { 1182 mDrawingProxy.dismissMoreKeysPanel(); 1183 mIsShowingMoreKeysPanel = false; 1184 } 1185 } 1186 1187 private void startRepeatKey(final Key key) { 1188 if (key != null && key.isRepeatable() && !sInGesture) { 1189 onRegisterKey(key); 1190 mTimerProxy.startKeyRepeatTimer(this); 1191 } 1192 } 1193 1194 public void onRegisterKey(final Key key) { 1195 if (key != null) { 1196 detectAndSendKey(key, key.mX, key.mY, SystemClock.uptimeMillis()); 1197 mTimerProxy.startTypingStateTimer(key); 1198 } 1199 } 1200 1201 private boolean isMajorEnoughMoveToBeOnNewKey(final int x, final int y, final long eventTime, 1202 final Key newKey) { 1203 if (mKeyDetector == null) { 1204 throw new NullPointerException("keyboard and/or key detector not set"); 1205 } 1206 final Key curKey = mCurrentKey; 1207 if (newKey == curKey) { 1208 return false; 1209 } 1210 if (curKey == null /* && newKey != null */) { 1211 return true; 1212 } 1213 // Here curKey points to the different key from newKey. 1214 final int keyHysteresisDistanceSquared = mKeyDetector.getKeyHysteresisDistanceSquared( 1215 mIsInSlidingKeyInputFromModifier); 1216 final int distanceFromKeyEdgeSquared = curKey.squaredDistanceToEdge(x, y); 1217 if (distanceFromKeyEdgeSquared >= keyHysteresisDistanceSquared) { 1218 if (DEBUG_MODE) { 1219 final float distanceToEdgeRatio = (float)Math.sqrt(distanceFromKeyEdgeSquared) 1220 / mKeyboard.mMostCommonKeyWidth; 1221 Log.d(TAG, String.format("[%d] isMajorEnoughMoveToBeOnNewKey:" 1222 +" %.2f key width from key edge", mPointerId, distanceToEdgeRatio)); 1223 } 1224 return true; 1225 } 1226 if (sNeedsProximateBogusDownMoveUpEventHack && !mIsAllowedSlidingKeyInput 1227 && sTimeRecorder.isInFastTyping(eventTime) 1228 && mBogusMoveEventDetector.hasTraveledLongDistance(x, y)) { 1229 if (DEBUG_MODE) { 1230 final float keyDiagonal = (float)Math.hypot( 1231 mKeyboard.mMostCommonKeyWidth, mKeyboard.mMostCommonKeyHeight); 1232 final float lengthFromDownRatio = 1233 mBogusMoveEventDetector.mAccumulatedDistanceFromDownKey / keyDiagonal; 1234 Log.d(TAG, String.format("[%d] isMajorEnoughMoveToBeOnNewKey:" 1235 + " %.2f key diagonal from virtual down point", 1236 mPointerId, lengthFromDownRatio)); 1237 } 1238 return true; 1239 } 1240 return false; 1241 } 1242 1243 private void startLongPressTimer(final Key key) { 1244 if (key != null && key.isLongPressEnabled() && !sInGesture) { 1245 mTimerProxy.startLongPressTimer(this); 1246 } 1247 } 1248 1249 private void detectAndSendKey(final Key key, final int x, final int y, final long eventTime) { 1250 if (key == null) { 1251 callListenerOnCancelInput(); 1252 return; 1253 } 1254 1255 final int code = key.mCode; 1256 callListenerOnCodeInput(key, code, x, y, eventTime); 1257 callListenerOnRelease(key, code, false); 1258 } 1259 1260 private void printTouchEvent(final String title, final int x, final int y, 1261 final long eventTime) { 1262 final Key key = mKeyDetector.detectHitKey(x, y); 1263 final String code = KeyDetector.printableCode(key); 1264 Log.d(TAG, String.format("[%d]%s%s %4d %4d %5d %s", mPointerId, 1265 (mIsTrackingCanceled ? "-" : " "), title, x, y, eventTime, code)); 1266 } 1267} 1268