1 /* 2 * Copyright (C) 2008-2009 Google Inc. 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 17 package android.inputmethodservice; 18 19 import android.compat.annotation.UnsupportedAppUsage; 20 import android.content.Context; 21 import android.content.res.TypedArray; 22 import android.graphics.Bitmap; 23 import android.graphics.Canvas; 24 import android.graphics.Paint; 25 import android.graphics.Paint.Align; 26 import android.graphics.PorterDuff; 27 import android.graphics.Rect; 28 import android.graphics.Typeface; 29 import android.graphics.drawable.Drawable; 30 import android.inputmethodservice.Keyboard.Key; 31 import android.media.AudioManager; 32 import android.os.Handler; 33 import android.os.Message; 34 import android.util.AttributeSet; 35 import android.util.TypedValue; 36 import android.view.GestureDetector; 37 import android.view.Gravity; 38 import android.view.LayoutInflater; 39 import android.view.MotionEvent; 40 import android.view.View; 41 import android.view.ViewConfiguration; 42 import android.view.ViewGroup.LayoutParams; 43 import android.view.accessibility.AccessibilityEvent; 44 import android.view.accessibility.AccessibilityManager; 45 import android.widget.PopupWindow; 46 import android.widget.TextView; 47 48 import com.android.internal.R; 49 50 import java.util.Arrays; 51 import java.util.HashMap; 52 import java.util.List; 53 import java.util.Map; 54 55 /** 56 * A view that renders a virtual {@link Keyboard}. It handles rendering of keys and 57 * detecting key presses and touch movements. 58 * 59 * @attr ref android.R.styleable#KeyboardView_keyBackground 60 * @attr ref android.R.styleable#KeyboardView_keyPreviewLayout 61 * @attr ref android.R.styleable#KeyboardView_keyPreviewOffset 62 * @attr ref android.R.styleable#KeyboardView_keyPreviewHeight 63 * @attr ref android.R.styleable#KeyboardView_labelTextSize 64 * @attr ref android.R.styleable#KeyboardView_keyTextSize 65 * @attr ref android.R.styleable#KeyboardView_keyTextColor 66 * @attr ref android.R.styleable#KeyboardView_verticalCorrection 67 * @attr ref android.R.styleable#KeyboardView_popupLayout 68 * 69 * @deprecated This class is deprecated because this is just a convenient UI widget class that 70 * application developers can re-implement on top of existing public APIs. If you have 71 * already depended on this class, consider copying the implementation from AOSP into 72 * your project or re-implementing a similar widget by yourselves 73 */ 74 @Deprecated 75 public class KeyboardView extends View implements View.OnClickListener { 76 77 /** 78 * Listener for virtual keyboard events. 79 */ 80 public interface OnKeyboardActionListener { 81 82 /** 83 * Called when the user presses a key. This is sent before the {@link #onKey} is called. 84 * For keys that repeat, this is only called once. 85 * @param primaryCode the unicode of the key being pressed. If the touch is not on a valid 86 * key, the value will be zero. 87 */ onPress(int primaryCode)88 void onPress(int primaryCode); 89 90 /** 91 * Called when the user releases a key. This is sent after the {@link #onKey} is called. 92 * For keys that repeat, this is only called once. 93 * @param primaryCode the code of the key that was released 94 */ onRelease(int primaryCode)95 void onRelease(int primaryCode); 96 97 /** 98 * Send a key press to the listener. 99 * @param primaryCode this is the key that was pressed 100 * @param keyCodes the codes for all the possible alternative keys 101 * with the primary code being the first. If the primary key code is 102 * a single character such as an alphabet or number or symbol, the alternatives 103 * will include other characters that may be on the same key or adjacent keys. 104 * These codes are useful to correct for accidental presses of a key adjacent to 105 * the intended key. 106 */ onKey(int primaryCode, int[] keyCodes)107 void onKey(int primaryCode, int[] keyCodes); 108 109 /** 110 * Sends a sequence of characters to the listener. 111 * @param text the sequence of characters to be displayed. 112 */ onText(CharSequence text)113 void onText(CharSequence text); 114 115 /** 116 * Called when the user quickly moves the finger from right to left. 117 */ swipeLeft()118 void swipeLeft(); 119 120 /** 121 * Called when the user quickly moves the finger from left to right. 122 */ swipeRight()123 void swipeRight(); 124 125 /** 126 * Called when the user quickly moves the finger from up to down. 127 */ swipeDown()128 void swipeDown(); 129 130 /** 131 * Called when the user quickly moves the finger from down to up. 132 */ swipeUp()133 void swipeUp(); 134 } 135 136 private static final boolean DEBUG = false; 137 private static final int NOT_A_KEY = -1; 138 private static final int[] KEY_DELETE = { Keyboard.KEYCODE_DELETE }; 139 private static final int[] LONG_PRESSABLE_STATE_SET = { R.attr.state_long_pressable }; 140 141 private Keyboard mKeyboard; 142 private int mCurrentKeyIndex = NOT_A_KEY; 143 @UnsupportedAppUsage 144 private int mLabelTextSize; 145 private int mKeyTextSize; 146 private int mKeyTextColor; 147 private float mShadowRadius; 148 private int mShadowColor; 149 private float mBackgroundDimAmount; 150 151 @UnsupportedAppUsage 152 private TextView mPreviewText; 153 private PopupWindow mPreviewPopup; 154 private int mPreviewTextSizeLarge; 155 private int mPreviewOffset; 156 private int mPreviewHeight; 157 // Working variable 158 private final int[] mCoordinates = new int[2]; 159 160 private PopupWindow mPopupKeyboard; 161 private View mMiniKeyboardContainer; 162 private KeyboardView mMiniKeyboard; 163 private boolean mMiniKeyboardOnScreen; 164 private View mPopupParent; 165 private int mMiniKeyboardOffsetX; 166 private int mMiniKeyboardOffsetY; 167 private Map<Key,View> mMiniKeyboardCache; 168 private Key[] mKeys; 169 170 /** Listener for {@link OnKeyboardActionListener}. */ 171 private OnKeyboardActionListener mKeyboardActionListener; 172 173 private static final int MSG_SHOW_PREVIEW = 1; 174 private static final int MSG_REMOVE_PREVIEW = 2; 175 private static final int MSG_REPEAT = 3; 176 private static final int MSG_LONGPRESS = 4; 177 178 private static final int DELAY_BEFORE_PREVIEW = 0; 179 private static final int DELAY_AFTER_PREVIEW = 70; 180 private static final int DEBOUNCE_TIME = 70; 181 182 private int mVerticalCorrection; 183 private int mProximityThreshold; 184 185 private boolean mPreviewCentered = false; 186 private boolean mShowPreview = true; 187 private boolean mShowTouchPoints = true; 188 private int mPopupPreviewX; 189 private int mPopupPreviewY; 190 191 private int mLastX; 192 private int mLastY; 193 private int mStartX; 194 private int mStartY; 195 196 private boolean mProximityCorrectOn; 197 198 private Paint mPaint; 199 private Rect mPadding; 200 201 private long mDownTime; 202 private long mLastMoveTime; 203 private int mLastKey; 204 private int mLastCodeX; 205 private int mLastCodeY; 206 private int mCurrentKey = NOT_A_KEY; 207 private int mDownKey = NOT_A_KEY; 208 private long mLastKeyTime; 209 private long mCurrentKeyTime; 210 private int[] mKeyIndices = new int[12]; 211 private GestureDetector mGestureDetector; 212 private int mPopupX; 213 private int mPopupY; 214 private int mRepeatKeyIndex = NOT_A_KEY; 215 private int mPopupLayout; 216 private boolean mAbortKey; 217 private Key mInvalidatedKey; 218 private Rect mClipRegion = new Rect(0, 0, 0, 0); 219 private boolean mPossiblePoly; 220 private SwipeTracker mSwipeTracker = new SwipeTracker(); 221 private int mSwipeThreshold; 222 private boolean mDisambiguateSwipe; 223 224 // Variables for dealing with multiple pointers 225 private int mOldPointerCount = 1; 226 private float mOldPointerX; 227 private float mOldPointerY; 228 229 @UnsupportedAppUsage 230 private Drawable mKeyBackground; 231 232 private static final int REPEAT_INTERVAL = 50; // ~20 keys per second 233 private static final int REPEAT_START_DELAY = 400; 234 private static final int LONGPRESS_TIMEOUT = ViewConfiguration.getLongPressTimeout(); 235 236 private static int MAX_NEARBY_KEYS = 12; 237 private int[] mDistances = new int[MAX_NEARBY_KEYS]; 238 239 // For multi-tap 240 private int mLastSentIndex; 241 private int mTapCount; 242 private long mLastTapTime; 243 private boolean mInMultiTap; 244 private static final int MULTITAP_INTERVAL = 800; // milliseconds 245 private StringBuilder mPreviewLabel = new StringBuilder(1); 246 247 /** Whether the keyboard bitmap needs to be redrawn before it's blitted. **/ 248 private boolean mDrawPending; 249 /** The dirty region in the keyboard bitmap */ 250 private Rect mDirtyRect = new Rect(); 251 /** The keyboard bitmap for faster updates */ 252 private Bitmap mBuffer; 253 /** Notes if the keyboard just changed, so that we could possibly reallocate the mBuffer. */ 254 private boolean mKeyboardChanged; 255 /** The canvas for the above mutable keyboard bitmap */ 256 private Canvas mCanvas; 257 /** The accessibility manager for accessibility support */ 258 private AccessibilityManager mAccessibilityManager; 259 /** The audio manager for accessibility support */ 260 private AudioManager mAudioManager; 261 /** Whether the requirement of a headset to hear passwords if accessibility is enabled is announced. */ 262 private boolean mHeadsetRequiredToHearPasswordsAnnounced; 263 264 Handler mHandler; 265 KeyboardView(Context context, AttributeSet attrs)266 public KeyboardView(Context context, AttributeSet attrs) { 267 this(context, attrs, com.android.internal.R.attr.keyboardViewStyle); 268 } 269 KeyboardView(Context context, AttributeSet attrs, int defStyleAttr)270 public KeyboardView(Context context, AttributeSet attrs, int defStyleAttr) { 271 this(context, attrs, defStyleAttr, 0); 272 } 273 KeyboardView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)274 public KeyboardView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 275 super(context, attrs, defStyleAttr, defStyleRes); 276 277 TypedArray a = context.obtainStyledAttributes( 278 attrs, android.R.styleable.KeyboardView, defStyleAttr, defStyleRes); 279 280 LayoutInflater inflate = 281 (LayoutInflater) context 282 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 283 284 int previewLayout = 0; 285 int keyTextSize = 0; 286 287 int n = a.getIndexCount(); 288 289 for (int i = 0; i < n; i++) { 290 int attr = a.getIndex(i); 291 292 switch (attr) { 293 case com.android.internal.R.styleable.KeyboardView_keyBackground: 294 mKeyBackground = a.getDrawable(attr); 295 break; 296 case com.android.internal.R.styleable.KeyboardView_verticalCorrection: 297 mVerticalCorrection = a.getDimensionPixelOffset(attr, 0); 298 break; 299 case com.android.internal.R.styleable.KeyboardView_keyPreviewLayout: 300 previewLayout = a.getResourceId(attr, 0); 301 break; 302 case com.android.internal.R.styleable.KeyboardView_keyPreviewOffset: 303 mPreviewOffset = a.getDimensionPixelOffset(attr, 0); 304 break; 305 case com.android.internal.R.styleable.KeyboardView_keyPreviewHeight: 306 mPreviewHeight = a.getDimensionPixelSize(attr, 80); 307 break; 308 case com.android.internal.R.styleable.KeyboardView_keyTextSize: 309 mKeyTextSize = a.getDimensionPixelSize(attr, 18); 310 break; 311 case com.android.internal.R.styleable.KeyboardView_keyTextColor: 312 mKeyTextColor = a.getColor(attr, 0xFF000000); 313 break; 314 case com.android.internal.R.styleable.KeyboardView_labelTextSize: 315 mLabelTextSize = a.getDimensionPixelSize(attr, 14); 316 break; 317 case com.android.internal.R.styleable.KeyboardView_popupLayout: 318 mPopupLayout = a.getResourceId(attr, 0); 319 break; 320 case com.android.internal.R.styleable.KeyboardView_shadowColor: 321 mShadowColor = a.getColor(attr, 0); 322 break; 323 case com.android.internal.R.styleable.KeyboardView_shadowRadius: 324 mShadowRadius = a.getFloat(attr, 0f); 325 break; 326 } 327 } 328 329 a = mContext.obtainStyledAttributes( 330 com.android.internal.R.styleable.Theme); 331 mBackgroundDimAmount = a.getFloat(android.R.styleable.Theme_backgroundDimAmount, 0.5f); 332 333 mPreviewPopup = new PopupWindow(context); 334 if (previewLayout != 0) { 335 mPreviewText = (TextView) inflate.inflate(previewLayout, null); 336 mPreviewTextSizeLarge = (int) mPreviewText.getTextSize(); 337 mPreviewPopup.setContentView(mPreviewText); 338 mPreviewPopup.setBackgroundDrawable(null); 339 } else { 340 mShowPreview = false; 341 } 342 343 mPreviewPopup.setTouchable(false); 344 345 mPopupKeyboard = new PopupWindow(context); 346 mPopupKeyboard.setBackgroundDrawable(null); 347 //mPopupKeyboard.setClippingEnabled(false); 348 349 mPopupParent = this; 350 //mPredicting = true; 351 352 mPaint = new Paint(); 353 mPaint.setAntiAlias(true); 354 mPaint.setTextSize(keyTextSize); 355 mPaint.setTextAlign(Align.CENTER); 356 mPaint.setAlpha(255); 357 358 mPadding = new Rect(0, 0, 0, 0); 359 mMiniKeyboardCache = new HashMap<Key,View>(); 360 mKeyBackground.getPadding(mPadding); 361 362 mSwipeThreshold = (int) (500 * getResources().getDisplayMetrics().density); 363 mDisambiguateSwipe = getResources().getBoolean( 364 com.android.internal.R.bool.config_swipeDisambiguation); 365 366 mAccessibilityManager = AccessibilityManager.getInstance(context); 367 mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); 368 369 resetMultiTap(); 370 } 371 372 @Override onAttachedToWindow()373 protected void onAttachedToWindow() { 374 super.onAttachedToWindow(); 375 initGestureDetector(); 376 if (mHandler == null) { 377 mHandler = new Handler() { 378 @Override 379 public void handleMessage(Message msg) { 380 switch (msg.what) { 381 case MSG_SHOW_PREVIEW: 382 showKey(msg.arg1); 383 break; 384 case MSG_REMOVE_PREVIEW: 385 mPreviewText.setVisibility(INVISIBLE); 386 break; 387 case MSG_REPEAT: 388 if (repeatKey()) { 389 Message repeat = Message.obtain(this, MSG_REPEAT); 390 sendMessageDelayed(repeat, REPEAT_INTERVAL); 391 } 392 break; 393 case MSG_LONGPRESS: 394 openPopupIfRequired((MotionEvent) msg.obj); 395 break; 396 } 397 } 398 }; 399 } 400 } 401 initGestureDetector()402 private void initGestureDetector() { 403 if (mGestureDetector == null) { 404 mGestureDetector = new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener() { 405 @Override 406 public boolean onFling(MotionEvent me1, MotionEvent me2, 407 float velocityX, float velocityY) { 408 if (mPossiblePoly) return false; 409 final float absX = Math.abs(velocityX); 410 final float absY = Math.abs(velocityY); 411 float deltaX = me2.getX() - me1.getX(); 412 float deltaY = me2.getY() - me1.getY(); 413 int travelX = getWidth() / 2; // Half the keyboard width 414 int travelY = getHeight() / 2; // Half the keyboard height 415 mSwipeTracker.computeCurrentVelocity(1000); 416 final float endingVelocityX = mSwipeTracker.getXVelocity(); 417 final float endingVelocityY = mSwipeTracker.getYVelocity(); 418 boolean sendDownKey = false; 419 if (velocityX > mSwipeThreshold && absY < absX && deltaX > travelX) { 420 if (mDisambiguateSwipe && endingVelocityX < velocityX / 4) { 421 sendDownKey = true; 422 } else { 423 swipeRight(); 424 return true; 425 } 426 } else if (velocityX < -mSwipeThreshold && absY < absX && deltaX < -travelX) { 427 if (mDisambiguateSwipe && endingVelocityX > velocityX / 4) { 428 sendDownKey = true; 429 } else { 430 swipeLeft(); 431 return true; 432 } 433 } else if (velocityY < -mSwipeThreshold && absX < absY && deltaY < -travelY) { 434 if (mDisambiguateSwipe && endingVelocityY > velocityY / 4) { 435 sendDownKey = true; 436 } else { 437 swipeUp(); 438 return true; 439 } 440 } else if (velocityY > mSwipeThreshold && absX < absY / 2 && deltaY > travelY) { 441 if (mDisambiguateSwipe && endingVelocityY < velocityY / 4) { 442 sendDownKey = true; 443 } else { 444 swipeDown(); 445 return true; 446 } 447 } 448 449 if (sendDownKey) { 450 detectAndSendKey(mDownKey, mStartX, mStartY, me1.getEventTime()); 451 } 452 return false; 453 } 454 }); 455 456 mGestureDetector.setIsLongpressEnabled(false); 457 } 458 } 459 setOnKeyboardActionListener(OnKeyboardActionListener listener)460 public void setOnKeyboardActionListener(OnKeyboardActionListener listener) { 461 mKeyboardActionListener = listener; 462 } 463 464 /** 465 * Returns the {@link OnKeyboardActionListener} object. 466 * @return the listener attached to this keyboard 467 */ getOnKeyboardActionListener()468 protected OnKeyboardActionListener getOnKeyboardActionListener() { 469 return mKeyboardActionListener; 470 } 471 472 /** 473 * Attaches a keyboard to this view. The keyboard can be switched at any time and the 474 * view will re-layout itself to accommodate the keyboard. 475 * @see Keyboard 476 * @see #getKeyboard() 477 * @param keyboard the keyboard to display in this view 478 */ setKeyboard(Keyboard keyboard)479 public void setKeyboard(Keyboard keyboard) { 480 if (mKeyboard != null) { 481 showPreview(NOT_A_KEY); 482 } 483 // Remove any pending messages 484 removeMessages(); 485 mKeyboard = keyboard; 486 List<Key> keys = mKeyboard.getKeys(); 487 mKeys = keys.toArray(new Key[keys.size()]); 488 requestLayout(); 489 // Hint to reallocate the buffer if the size changed 490 mKeyboardChanged = true; 491 invalidateAllKeys(); 492 computeProximityThreshold(keyboard); 493 mMiniKeyboardCache.clear(); // Not really necessary to do every time, but will free up views 494 // Switching to a different keyboard should abort any pending keys so that the key up 495 // doesn't get delivered to the old or new keyboard 496 mAbortKey = true; // Until the next ACTION_DOWN 497 } 498 499 /** 500 * Returns the current keyboard being displayed by this view. 501 * @return the currently attached keyboard 502 * @see #setKeyboard(Keyboard) 503 */ getKeyboard()504 public Keyboard getKeyboard() { 505 return mKeyboard; 506 } 507 508 /** 509 * Sets the state of the shift key of the keyboard, if any. 510 * @param shifted whether or not to enable the state of the shift key 511 * @return true if the shift key state changed, false if there was no change 512 * @see KeyboardView#isShifted() 513 */ setShifted(boolean shifted)514 public boolean setShifted(boolean shifted) { 515 if (mKeyboard != null) { 516 if (mKeyboard.setShifted(shifted)) { 517 // The whole keyboard probably needs to be redrawn 518 invalidateAllKeys(); 519 return true; 520 } 521 } 522 return false; 523 } 524 525 /** 526 * Returns the state of the shift key of the keyboard, if any. 527 * @return true if the shift is in a pressed state, false otherwise. If there is 528 * no shift key on the keyboard or there is no keyboard attached, it returns false. 529 * @see KeyboardView#setShifted(boolean) 530 */ isShifted()531 public boolean isShifted() { 532 if (mKeyboard != null) { 533 return mKeyboard.isShifted(); 534 } 535 return false; 536 } 537 538 /** 539 * Enables or disables the key feedback popup. This is a popup that shows a magnified 540 * version of the depressed key. By default the preview is enabled. 541 * @param previewEnabled whether or not to enable the key feedback popup 542 * @see #isPreviewEnabled() 543 */ setPreviewEnabled(boolean previewEnabled)544 public void setPreviewEnabled(boolean previewEnabled) { 545 mShowPreview = previewEnabled; 546 } 547 548 /** 549 * Returns the enabled state of the key feedback popup. 550 * @return whether or not the key feedback popup is enabled 551 * @see #setPreviewEnabled(boolean) 552 */ isPreviewEnabled()553 public boolean isPreviewEnabled() { 554 return mShowPreview; 555 } 556 setVerticalCorrection(int verticalOffset)557 public void setVerticalCorrection(int verticalOffset) { 558 559 } setPopupParent(View v)560 public void setPopupParent(View v) { 561 mPopupParent = v; 562 } 563 setPopupOffset(int x, int y)564 public void setPopupOffset(int x, int y) { 565 mMiniKeyboardOffsetX = x; 566 mMiniKeyboardOffsetY = y; 567 if (mPreviewPopup.isShowing()) { 568 mPreviewPopup.dismiss(); 569 } 570 } 571 572 /** 573 * When enabled, calls to {@link OnKeyboardActionListener#onKey} will include key 574 * codes for adjacent keys. When disabled, only the primary key code will be 575 * reported. 576 * @param enabled whether or not the proximity correction is enabled 577 */ setProximityCorrectionEnabled(boolean enabled)578 public void setProximityCorrectionEnabled(boolean enabled) { 579 mProximityCorrectOn = enabled; 580 } 581 582 /** 583 * Returns true if proximity correction is enabled. 584 */ isProximityCorrectionEnabled()585 public boolean isProximityCorrectionEnabled() { 586 return mProximityCorrectOn; 587 } 588 589 /** 590 * Popup keyboard close button clicked. 591 * @hide 592 */ onClick(View v)593 public void onClick(View v) { 594 dismissPopupKeyboard(); 595 } 596 adjustCase(CharSequence label)597 private CharSequence adjustCase(CharSequence label) { 598 if (mKeyboard.isShifted() && label != null && label.length() < 3 599 && Character.isLowerCase(label.charAt(0))) { 600 label = label.toString().toUpperCase(); 601 } 602 return label; 603 } 604 605 @Override onMeasure(int widthMeasureSpec, int heightMeasureSpec)606 public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 607 // Round up a little 608 if (mKeyboard == null) { 609 setMeasuredDimension(mPaddingLeft + mPaddingRight, mPaddingTop + mPaddingBottom); 610 } else { 611 int width = mKeyboard.getMinWidth() + mPaddingLeft + mPaddingRight; 612 if (MeasureSpec.getSize(widthMeasureSpec) < width + 10) { 613 width = MeasureSpec.getSize(widthMeasureSpec); 614 } 615 setMeasuredDimension(width, mKeyboard.getHeight() + mPaddingTop + mPaddingBottom); 616 } 617 } 618 619 /** 620 * Compute the average distance between adjacent keys (horizontally and vertically) 621 * and square it to get the proximity threshold. We use a square here and in computing 622 * the touch distance from a key's center to avoid taking a square root. 623 * @param keyboard 624 */ computeProximityThreshold(Keyboard keyboard)625 private void computeProximityThreshold(Keyboard keyboard) { 626 if (keyboard == null) return; 627 final Key[] keys = mKeys; 628 if (keys == null) return; 629 int length = keys.length; 630 int dimensionSum = 0; 631 for (int i = 0; i < length; i++) { 632 Key key = keys[i]; 633 dimensionSum += Math.min(key.width, key.height) + key.gap; 634 } 635 if (dimensionSum < 0 || length == 0) return; 636 mProximityThreshold = (int) (dimensionSum * 1.4f / length); 637 mProximityThreshold *= mProximityThreshold; // Square it 638 } 639 640 @Override onSizeChanged(int w, int h, int oldw, int oldh)641 public void onSizeChanged(int w, int h, int oldw, int oldh) { 642 super.onSizeChanged(w, h, oldw, oldh); 643 if (mKeyboard != null) { 644 mKeyboard.resize(w, h); 645 } 646 // Release the buffer, if any and it will be reallocated on the next draw 647 mBuffer = null; 648 } 649 650 @Override onDraw(Canvas canvas)651 public void onDraw(Canvas canvas) { 652 super.onDraw(canvas); 653 if (mDrawPending || mBuffer == null || mKeyboardChanged) { 654 onBufferDraw(); 655 } 656 canvas.drawBitmap(mBuffer, 0, 0, null); 657 } 658 onBufferDraw()659 private void onBufferDraw() { 660 if (mBuffer == null || mKeyboardChanged) { 661 if (mBuffer == null || mKeyboardChanged && 662 (mBuffer.getWidth() != getWidth() || mBuffer.getHeight() != getHeight())) { 663 // Make sure our bitmap is at least 1x1 664 final int width = Math.max(1, getWidth()); 665 final int height = Math.max(1, getHeight()); 666 mBuffer = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); 667 mCanvas = new Canvas(mBuffer); 668 } 669 invalidateAllKeys(); 670 mKeyboardChanged = false; 671 } 672 673 if (mKeyboard == null) return; 674 675 mCanvas.save(); 676 final Canvas canvas = mCanvas; 677 canvas.clipRect(mDirtyRect); 678 679 final Paint paint = mPaint; 680 final Drawable keyBackground = mKeyBackground; 681 final Rect clipRegion = mClipRegion; 682 final Rect padding = mPadding; 683 final int kbdPaddingLeft = mPaddingLeft; 684 final int kbdPaddingTop = mPaddingTop; 685 final Key[] keys = mKeys; 686 final Key invalidKey = mInvalidatedKey; 687 688 paint.setColor(mKeyTextColor); 689 boolean drawSingleKey = false; 690 if (invalidKey != null && canvas.getClipBounds(clipRegion)) { 691 // Is clipRegion completely contained within the invalidated key? 692 if (invalidKey.x + kbdPaddingLeft - 1 <= clipRegion.left && 693 invalidKey.y + kbdPaddingTop - 1 <= clipRegion.top && 694 invalidKey.x + invalidKey.width + kbdPaddingLeft + 1 >= clipRegion.right && 695 invalidKey.y + invalidKey.height + kbdPaddingTop + 1 >= clipRegion.bottom) { 696 drawSingleKey = true; 697 } 698 } 699 canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR); 700 final int keyCount = keys.length; 701 for (int i = 0; i < keyCount; i++) { 702 final Key key = keys[i]; 703 if (drawSingleKey && invalidKey != key) { 704 continue; 705 } 706 int[] drawableState = key.getCurrentDrawableState(); 707 keyBackground.setState(drawableState); 708 709 // Switch the character to uppercase if shift is pressed 710 String label = key.label == null? null : adjustCase(key.label).toString(); 711 712 final Rect bounds = keyBackground.getBounds(); 713 if (key.width != bounds.right || 714 key.height != bounds.bottom) { 715 keyBackground.setBounds(0, 0, key.width, key.height); 716 } 717 canvas.translate(key.x + kbdPaddingLeft, key.y + kbdPaddingTop); 718 keyBackground.draw(canvas); 719 720 if (label != null) { 721 // For characters, use large font. For labels like "Done", use small font. 722 if (label.length() > 1 && key.codes.length < 2) { 723 paint.setTextSize(mLabelTextSize); 724 paint.setTypeface(Typeface.DEFAULT_BOLD); 725 } else { 726 paint.setTextSize(mKeyTextSize); 727 paint.setTypeface(Typeface.DEFAULT); 728 } 729 // Draw a drop shadow for the text 730 paint.setShadowLayer(mShadowRadius, 0, 0, mShadowColor); 731 // Draw the text 732 canvas.drawText(label, 733 (key.width - padding.left - padding.right) / 2 734 + padding.left, 735 (key.height - padding.top - padding.bottom) / 2 736 + (paint.getTextSize() - paint.descent()) / 2 + padding.top, 737 paint); 738 // Turn off drop shadow 739 paint.setShadowLayer(0, 0, 0, 0); 740 } else if (key.icon != null) { 741 final int drawableX = (key.width - padding.left - padding.right 742 - key.icon.getIntrinsicWidth()) / 2 + padding.left; 743 final int drawableY = (key.height - padding.top - padding.bottom 744 - key.icon.getIntrinsicHeight()) / 2 + padding.top; 745 canvas.translate(drawableX, drawableY); 746 key.icon.setBounds(0, 0, 747 key.icon.getIntrinsicWidth(), key.icon.getIntrinsicHeight()); 748 key.icon.draw(canvas); 749 canvas.translate(-drawableX, -drawableY); 750 } 751 canvas.translate(-key.x - kbdPaddingLeft, -key.y - kbdPaddingTop); 752 } 753 mInvalidatedKey = null; 754 // Overlay a dark rectangle to dim the keyboard 755 if (mMiniKeyboardOnScreen) { 756 paint.setColor((int) (mBackgroundDimAmount * 0xFF) << 24); 757 canvas.drawRect(0, 0, getWidth(), getHeight(), paint); 758 } 759 760 if (DEBUG && mShowTouchPoints) { 761 paint.setAlpha(128); 762 paint.setColor(0xFFFF0000); 763 canvas.drawCircle(mStartX, mStartY, 3, paint); 764 canvas.drawLine(mStartX, mStartY, mLastX, mLastY, paint); 765 paint.setColor(0xFF0000FF); 766 canvas.drawCircle(mLastX, mLastY, 3, paint); 767 paint.setColor(0xFF00FF00); 768 canvas.drawCircle((mStartX + mLastX) / 2, (mStartY + mLastY) / 2, 2, paint); 769 } 770 mCanvas.restore(); 771 mDrawPending = false; 772 mDirtyRect.setEmpty(); 773 } 774 getKeyIndices(int x, int y, int[] allKeys)775 private int getKeyIndices(int x, int y, int[] allKeys) { 776 final Key[] keys = mKeys; 777 int primaryIndex = NOT_A_KEY; 778 int closestKey = NOT_A_KEY; 779 int closestKeyDist = mProximityThreshold + 1; 780 java.util.Arrays.fill(mDistances, Integer.MAX_VALUE); 781 int [] nearestKeyIndices = mKeyboard.getNearestKeys(x, y); 782 final int keyCount = nearestKeyIndices.length; 783 for (int i = 0; i < keyCount; i++) { 784 final Key key = keys[nearestKeyIndices[i]]; 785 int dist = 0; 786 boolean isInside = key.isInside(x,y); 787 if (isInside) { 788 primaryIndex = nearestKeyIndices[i]; 789 } 790 791 if (((mProximityCorrectOn 792 && (dist = key.squaredDistanceFrom(x, y)) < mProximityThreshold) 793 || isInside) 794 && key.codes[0] > 32) { 795 // Find insertion point 796 final int nCodes = key.codes.length; 797 if (dist < closestKeyDist) { 798 closestKeyDist = dist; 799 closestKey = nearestKeyIndices[i]; 800 } 801 802 if (allKeys == null) continue; 803 804 for (int j = 0; j < mDistances.length; j++) { 805 if (mDistances[j] > dist) { 806 // Make space for nCodes codes 807 System.arraycopy(mDistances, j, mDistances, j + nCodes, 808 mDistances.length - j - nCodes); 809 System.arraycopy(allKeys, j, allKeys, j + nCodes, 810 allKeys.length - j - nCodes); 811 for (int c = 0; c < nCodes; c++) { 812 allKeys[j + c] = key.codes[c]; 813 mDistances[j + c] = dist; 814 } 815 break; 816 } 817 } 818 } 819 } 820 if (primaryIndex == NOT_A_KEY) { 821 primaryIndex = closestKey; 822 } 823 return primaryIndex; 824 } 825 detectAndSendKey(int index, int x, int y, long eventTime)826 private void detectAndSendKey(int index, int x, int y, long eventTime) { 827 if (index != NOT_A_KEY && index < mKeys.length) { 828 final Key key = mKeys[index]; 829 if (key.text != null) { 830 mKeyboardActionListener.onText(key.text); 831 mKeyboardActionListener.onRelease(NOT_A_KEY); 832 } else { 833 int code = key.codes[0]; 834 //TextEntryState.keyPressedAt(key, x, y); 835 int[] codes = new int[MAX_NEARBY_KEYS]; 836 Arrays.fill(codes, NOT_A_KEY); 837 getKeyIndices(x, y, codes); 838 // Multi-tap 839 if (mInMultiTap) { 840 if (mTapCount != -1) { 841 mKeyboardActionListener.onKey(Keyboard.KEYCODE_DELETE, KEY_DELETE); 842 } else { 843 mTapCount = 0; 844 } 845 code = key.codes[mTapCount]; 846 } 847 mKeyboardActionListener.onKey(code, codes); 848 mKeyboardActionListener.onRelease(code); 849 } 850 mLastSentIndex = index; 851 mLastTapTime = eventTime; 852 } 853 } 854 855 /** 856 * Handle multi-tap keys by producing the key label for the current multi-tap state. 857 */ getPreviewText(Key key)858 private CharSequence getPreviewText(Key key) { 859 if (mInMultiTap) { 860 // Multi-tap 861 mPreviewLabel.setLength(0); 862 mPreviewLabel.append((char) key.codes[mTapCount < 0 ? 0 : mTapCount]); 863 return adjustCase(mPreviewLabel); 864 } else { 865 return adjustCase(key.label); 866 } 867 } 868 showPreview(int keyIndex)869 private void showPreview(int keyIndex) { 870 int oldKeyIndex = mCurrentKeyIndex; 871 final PopupWindow previewPopup = mPreviewPopup; 872 873 mCurrentKeyIndex = keyIndex; 874 // Release the old key and press the new key 875 final Key[] keys = mKeys; 876 if (oldKeyIndex != mCurrentKeyIndex) { 877 if (oldKeyIndex != NOT_A_KEY && keys.length > oldKeyIndex) { 878 Key oldKey = keys[oldKeyIndex]; 879 oldKey.onReleased(mCurrentKeyIndex == NOT_A_KEY); 880 invalidateKey(oldKeyIndex); 881 final int keyCode = oldKey.codes[0]; 882 sendAccessibilityEventForUnicodeCharacter(AccessibilityEvent.TYPE_VIEW_HOVER_EXIT, 883 keyCode); 884 // TODO: We need to implement AccessibilityNodeProvider for this view. 885 sendAccessibilityEventForUnicodeCharacter( 886 AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED, keyCode); 887 } 888 if (mCurrentKeyIndex != NOT_A_KEY && keys.length > mCurrentKeyIndex) { 889 Key newKey = keys[mCurrentKeyIndex]; 890 newKey.onPressed(); 891 invalidateKey(mCurrentKeyIndex); 892 final int keyCode = newKey.codes[0]; 893 sendAccessibilityEventForUnicodeCharacter(AccessibilityEvent.TYPE_VIEW_HOVER_ENTER, 894 keyCode); 895 // TODO: We need to implement AccessibilityNodeProvider for this view. 896 sendAccessibilityEventForUnicodeCharacter( 897 AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED, keyCode); 898 } 899 } 900 // If key changed and preview is on ... 901 if (oldKeyIndex != mCurrentKeyIndex && mShowPreview) { 902 mHandler.removeMessages(MSG_SHOW_PREVIEW); 903 if (previewPopup.isShowing()) { 904 if (keyIndex == NOT_A_KEY) { 905 mHandler.sendMessageDelayed(mHandler 906 .obtainMessage(MSG_REMOVE_PREVIEW), 907 DELAY_AFTER_PREVIEW); 908 } 909 } 910 if (keyIndex != NOT_A_KEY) { 911 if (previewPopup.isShowing() && mPreviewText.getVisibility() == VISIBLE) { 912 // Show right away, if it's already visible and finger is moving around 913 showKey(keyIndex); 914 } else { 915 mHandler.sendMessageDelayed( 916 mHandler.obtainMessage(MSG_SHOW_PREVIEW, keyIndex, 0), 917 DELAY_BEFORE_PREVIEW); 918 } 919 } 920 } 921 } 922 923 @UnsupportedAppUsage showKey(final int keyIndex)924 private void showKey(final int keyIndex) { 925 final PopupWindow previewPopup = mPreviewPopup; 926 final Key[] keys = mKeys; 927 if (keyIndex < 0 || keyIndex >= mKeys.length) return; 928 Key key = keys[keyIndex]; 929 if (key.icon != null) { 930 mPreviewText.setCompoundDrawables(null, null, null, 931 key.iconPreview != null ? key.iconPreview : key.icon); 932 mPreviewText.setText(null); 933 } else { 934 mPreviewText.setCompoundDrawables(null, null, null, null); 935 mPreviewText.setText(getPreviewText(key)); 936 if (key.label.length() > 1 && key.codes.length < 2) { 937 mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mKeyTextSize); 938 mPreviewText.setTypeface(Typeface.DEFAULT_BOLD); 939 } else { 940 mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mPreviewTextSizeLarge); 941 mPreviewText.setTypeface(Typeface.DEFAULT); 942 } 943 } 944 mPreviewText.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 945 MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); 946 int popupWidth = Math.max(mPreviewText.getMeasuredWidth(), key.width 947 + mPreviewText.getPaddingLeft() + mPreviewText.getPaddingRight()); 948 final int popupHeight = mPreviewHeight; 949 LayoutParams lp = mPreviewText.getLayoutParams(); 950 if (lp != null) { 951 lp.width = popupWidth; 952 lp.height = popupHeight; 953 } 954 if (!mPreviewCentered) { 955 mPopupPreviewX = key.x - mPreviewText.getPaddingLeft() + mPaddingLeft; 956 mPopupPreviewY = key.y - popupHeight + mPreviewOffset; 957 } else { 958 // TODO: Fix this if centering is brought back 959 mPopupPreviewX = 160 - mPreviewText.getMeasuredWidth() / 2; 960 mPopupPreviewY = - mPreviewText.getMeasuredHeight(); 961 } 962 mHandler.removeMessages(MSG_REMOVE_PREVIEW); 963 getLocationInWindow(mCoordinates); 964 mCoordinates[0] += mMiniKeyboardOffsetX; // Offset may be zero 965 mCoordinates[1] += mMiniKeyboardOffsetY; // Offset may be zero 966 967 // Set the preview background state 968 mPreviewText.getBackground().setState( 969 key.popupResId != 0 ? LONG_PRESSABLE_STATE_SET : EMPTY_STATE_SET); 970 mPopupPreviewX += mCoordinates[0]; 971 mPopupPreviewY += mCoordinates[1]; 972 973 // If the popup cannot be shown above the key, put it on the side 974 getLocationOnScreen(mCoordinates); 975 if (mPopupPreviewY + mCoordinates[1] < 0) { 976 // If the key you're pressing is on the left side of the keyboard, show the popup on 977 // the right, offset by enough to see at least one key to the left/right. 978 if (key.x + key.width <= getWidth() / 2) { 979 mPopupPreviewX += (int) (key.width * 2.5); 980 } else { 981 mPopupPreviewX -= (int) (key.width * 2.5); 982 } 983 mPopupPreviewY += popupHeight; 984 } 985 986 if (previewPopup.isShowing()) { 987 previewPopup.update(mPopupPreviewX, mPopupPreviewY, 988 popupWidth, popupHeight); 989 } else { 990 previewPopup.setWidth(popupWidth); 991 previewPopup.setHeight(popupHeight); 992 previewPopup.showAtLocation(mPopupParent, Gravity.NO_GRAVITY, 993 mPopupPreviewX, mPopupPreviewY); 994 } 995 mPreviewText.setVisibility(VISIBLE); 996 } 997 sendAccessibilityEventForUnicodeCharacter(int eventType, int code)998 private void sendAccessibilityEventForUnicodeCharacter(int eventType, int code) { 999 if (mAccessibilityManager.isEnabled()) { 1000 AccessibilityEvent event = AccessibilityEvent.obtain(eventType); 1001 onInitializeAccessibilityEvent(event); 1002 final String text; 1003 switch (code) { 1004 case Keyboard.KEYCODE_ALT: 1005 text = mContext.getString(R.string.keyboardview_keycode_alt); 1006 break; 1007 case Keyboard.KEYCODE_CANCEL: 1008 text = mContext.getString(R.string.keyboardview_keycode_cancel); 1009 break; 1010 case Keyboard.KEYCODE_DELETE: 1011 text = mContext.getString(R.string.keyboardview_keycode_delete); 1012 break; 1013 case Keyboard.KEYCODE_DONE: 1014 text = mContext.getString(R.string.keyboardview_keycode_done); 1015 break; 1016 case Keyboard.KEYCODE_MODE_CHANGE: 1017 text = mContext.getString(R.string.keyboardview_keycode_mode_change); 1018 break; 1019 case Keyboard.KEYCODE_SHIFT: 1020 text = mContext.getString(R.string.keyboardview_keycode_shift); 1021 break; 1022 case '\n': 1023 text = mContext.getString(R.string.keyboardview_keycode_enter); 1024 break; 1025 default: 1026 text = String.valueOf((char) code); 1027 } 1028 event.getText().add(text); 1029 mAccessibilityManager.sendAccessibilityEvent(event); 1030 } 1031 } 1032 1033 /** 1034 * Requests a redraw of the entire keyboard. Calling {@link #invalidate} is not sufficient 1035 * because the keyboard renders the keys to an off-screen buffer and an invalidate() only 1036 * draws the cached buffer. 1037 * @see #invalidateKey(int) 1038 */ invalidateAllKeys()1039 public void invalidateAllKeys() { 1040 mDirtyRect.union(0, 0, getWidth(), getHeight()); 1041 mDrawPending = true; 1042 invalidate(); 1043 } 1044 1045 /** 1046 * Invalidates a key so that it will be redrawn on the next repaint. Use this method if only 1047 * one key is changing it's content. Any changes that affect the position or size of the key 1048 * may not be honored. 1049 * @param keyIndex the index of the key in the attached {@link Keyboard}. 1050 * @see #invalidateAllKeys 1051 */ invalidateKey(int keyIndex)1052 public void invalidateKey(int keyIndex) { 1053 if (mKeys == null) return; 1054 if (keyIndex < 0 || keyIndex >= mKeys.length) { 1055 return; 1056 } 1057 final Key key = mKeys[keyIndex]; 1058 mInvalidatedKey = key; 1059 mDirtyRect.union(key.x + mPaddingLeft, key.y + mPaddingTop, 1060 key.x + key.width + mPaddingLeft, key.y + key.height + mPaddingTop); 1061 onBufferDraw(); 1062 invalidate(key.x + mPaddingLeft, key.y + mPaddingTop, 1063 key.x + key.width + mPaddingLeft, key.y + key.height + mPaddingTop); 1064 } 1065 1066 @UnsupportedAppUsage openPopupIfRequired(MotionEvent me)1067 private boolean openPopupIfRequired(MotionEvent me) { 1068 // Check if we have a popup layout specified first. 1069 if (mPopupLayout == 0) { 1070 return false; 1071 } 1072 if (mCurrentKey < 0 || mCurrentKey >= mKeys.length) { 1073 return false; 1074 } 1075 1076 Key popupKey = mKeys[mCurrentKey]; 1077 boolean result = onLongPress(popupKey); 1078 if (result) { 1079 mAbortKey = true; 1080 showPreview(NOT_A_KEY); 1081 } 1082 return result; 1083 } 1084 1085 /** 1086 * Called when a key is long pressed. By default this will open any popup keyboard associated 1087 * with this key through the attributes popupLayout and popupCharacters. 1088 * @param popupKey the key that was long pressed 1089 * @return true if the long press is handled, false otherwise. Subclasses should call the 1090 * method on the base class if the subclass doesn't wish to handle the call. 1091 */ onLongPress(Key popupKey)1092 protected boolean onLongPress(Key popupKey) { 1093 int popupKeyboardId = popupKey.popupResId; 1094 1095 if (popupKeyboardId != 0) { 1096 mMiniKeyboardContainer = mMiniKeyboardCache.get(popupKey); 1097 if (mMiniKeyboardContainer == null) { 1098 LayoutInflater inflater = (LayoutInflater) getContext().getSystemService( 1099 Context.LAYOUT_INFLATER_SERVICE); 1100 mMiniKeyboardContainer = inflater.inflate(mPopupLayout, null); 1101 mMiniKeyboard = (KeyboardView) mMiniKeyboardContainer.findViewById( 1102 com.android.internal.R.id.keyboardView); 1103 View closeButton = mMiniKeyboardContainer.findViewById( 1104 com.android.internal.R.id.closeButton); 1105 if (closeButton != null) closeButton.setOnClickListener(this); 1106 mMiniKeyboard.setOnKeyboardActionListener(new OnKeyboardActionListener() { 1107 public void onKey(int primaryCode, int[] keyCodes) { 1108 mKeyboardActionListener.onKey(primaryCode, keyCodes); 1109 dismissPopupKeyboard(); 1110 } 1111 1112 public void onText(CharSequence text) { 1113 mKeyboardActionListener.onText(text); 1114 dismissPopupKeyboard(); 1115 } 1116 1117 public void swipeLeft() { } 1118 public void swipeRight() { } 1119 public void swipeUp() { } 1120 public void swipeDown() { } 1121 public void onPress(int primaryCode) { 1122 mKeyboardActionListener.onPress(primaryCode); 1123 } 1124 public void onRelease(int primaryCode) { 1125 mKeyboardActionListener.onRelease(primaryCode); 1126 } 1127 }); 1128 //mInputView.setSuggest(mSuggest); 1129 Keyboard keyboard; 1130 if (popupKey.popupCharacters != null) { 1131 keyboard = new Keyboard(getContext(), popupKeyboardId, 1132 popupKey.popupCharacters, -1, getPaddingLeft() + getPaddingRight()); 1133 } else { 1134 keyboard = new Keyboard(getContext(), popupKeyboardId); 1135 } 1136 mMiniKeyboard.setKeyboard(keyboard); 1137 mMiniKeyboard.setPopupParent(this); 1138 mMiniKeyboardContainer.measure( 1139 MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST), 1140 MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.AT_MOST)); 1141 1142 mMiniKeyboardCache.put(popupKey, mMiniKeyboardContainer); 1143 } else { 1144 mMiniKeyboard = (KeyboardView) mMiniKeyboardContainer.findViewById( 1145 com.android.internal.R.id.keyboardView); 1146 } 1147 getLocationInWindow(mCoordinates); 1148 mPopupX = popupKey.x + mPaddingLeft; 1149 mPopupY = popupKey.y + mPaddingTop; 1150 mPopupX = mPopupX + popupKey.width - mMiniKeyboardContainer.getMeasuredWidth(); 1151 mPopupY = mPopupY - mMiniKeyboardContainer.getMeasuredHeight(); 1152 final int x = mPopupX + mMiniKeyboardContainer.getPaddingRight() + mCoordinates[0]; 1153 final int y = mPopupY + mMiniKeyboardContainer.getPaddingBottom() + mCoordinates[1]; 1154 mMiniKeyboard.setPopupOffset(x < 0 ? 0 : x, y); 1155 mMiniKeyboard.setShifted(isShifted()); 1156 mPopupKeyboard.setContentView(mMiniKeyboardContainer); 1157 mPopupKeyboard.setWidth(mMiniKeyboardContainer.getMeasuredWidth()); 1158 mPopupKeyboard.setHeight(mMiniKeyboardContainer.getMeasuredHeight()); 1159 mPopupKeyboard.showAtLocation(this, Gravity.NO_GRAVITY, x, y); 1160 mMiniKeyboardOnScreen = true; 1161 //mMiniKeyboard.onTouchEvent(getTranslatedEvent(me)); 1162 invalidateAllKeys(); 1163 return true; 1164 } 1165 return false; 1166 } 1167 1168 @Override 1169 public boolean onHoverEvent(MotionEvent event) { 1170 if (mAccessibilityManager.isTouchExplorationEnabled() && event.getPointerCount() == 1) { 1171 final int action = event.getAction(); 1172 switch (action) { 1173 case MotionEvent.ACTION_HOVER_ENTER: { 1174 event.setAction(MotionEvent.ACTION_DOWN); 1175 } break; 1176 case MotionEvent.ACTION_HOVER_MOVE: { 1177 event.setAction(MotionEvent.ACTION_MOVE); 1178 } break; 1179 case MotionEvent.ACTION_HOVER_EXIT: { 1180 event.setAction(MotionEvent.ACTION_UP); 1181 } break; 1182 } 1183 return onTouchEvent(event); 1184 } 1185 return true; 1186 } 1187 1188 @Override 1189 public boolean onTouchEvent(MotionEvent me) { 1190 // Convert multi-pointer up/down events to single up/down events to 1191 // deal with the typical multi-pointer behavior of two-thumb typing 1192 final int pointerCount = me.getPointerCount(); 1193 final int action = me.getAction(); 1194 boolean result = false; 1195 final long now = me.getEventTime(); 1196 1197 if (pointerCount != mOldPointerCount) { 1198 if (pointerCount == 1) { 1199 // Send a down event for the latest pointer 1200 MotionEvent down = MotionEvent.obtain(now, now, MotionEvent.ACTION_DOWN, 1201 me.getX(), me.getY(), me.getMetaState()); 1202 result = onModifiedTouchEvent(down, false); 1203 down.recycle(); 1204 // If it's an up action, then deliver the up as well. 1205 if (action == MotionEvent.ACTION_UP) { 1206 result = onModifiedTouchEvent(me, true); 1207 } 1208 } else { 1209 // Send an up event for the last pointer 1210 MotionEvent up = MotionEvent.obtain(now, now, MotionEvent.ACTION_UP, 1211 mOldPointerX, mOldPointerY, me.getMetaState()); 1212 result = onModifiedTouchEvent(up, true); 1213 up.recycle(); 1214 } 1215 } else { 1216 if (pointerCount == 1) { 1217 result = onModifiedTouchEvent(me, false); 1218 mOldPointerX = me.getX(); 1219 mOldPointerY = me.getY(); 1220 } else { 1221 // Don't do anything when 2 pointers are down and moving. 1222 result = true; 1223 } 1224 } 1225 mOldPointerCount = pointerCount; 1226 1227 return result; 1228 } 1229 1230 private boolean onModifiedTouchEvent(MotionEvent me, boolean possiblePoly) { 1231 int touchX = (int) me.getX() - mPaddingLeft; 1232 int touchY = (int) me.getY() - mPaddingTop; 1233 if (touchY >= -mVerticalCorrection) 1234 touchY += mVerticalCorrection; 1235 final int action = me.getAction(); 1236 final long eventTime = me.getEventTime(); 1237 int keyIndex = getKeyIndices(touchX, touchY, null); 1238 mPossiblePoly = possiblePoly; 1239 1240 // Track the last few movements to look for spurious swipes. 1241 if (action == MotionEvent.ACTION_DOWN) mSwipeTracker.clear(); 1242 mSwipeTracker.addMovement(me); 1243 1244 // Ignore all motion events until a DOWN. 1245 if (mAbortKey 1246 && action != MotionEvent.ACTION_DOWN && action != MotionEvent.ACTION_CANCEL) { 1247 return true; 1248 } 1249 1250 if (mGestureDetector.onTouchEvent(me)) { 1251 showPreview(NOT_A_KEY); 1252 mHandler.removeMessages(MSG_REPEAT); 1253 mHandler.removeMessages(MSG_LONGPRESS); 1254 return true; 1255 } 1256 1257 // Needs to be called after the gesture detector gets a turn, as it may have 1258 // displayed the mini keyboard 1259 if (mMiniKeyboardOnScreen && action != MotionEvent.ACTION_CANCEL) { 1260 return true; 1261 } 1262 1263 switch (action) { 1264 case MotionEvent.ACTION_DOWN: 1265 mAbortKey = false; 1266 mStartX = touchX; 1267 mStartY = touchY; 1268 mLastCodeX = touchX; 1269 mLastCodeY = touchY; 1270 mLastKeyTime = 0; 1271 mCurrentKeyTime = 0; 1272 mLastKey = NOT_A_KEY; 1273 mCurrentKey = keyIndex; 1274 mDownKey = keyIndex; 1275 mDownTime = me.getEventTime(); 1276 mLastMoveTime = mDownTime; 1277 checkMultiTap(eventTime, keyIndex); 1278 mKeyboardActionListener.onPress(keyIndex != NOT_A_KEY ? 1279 mKeys[keyIndex].codes[0] : 0); 1280 if (mCurrentKey >= 0 && mKeys[mCurrentKey].repeatable) { 1281 mRepeatKeyIndex = mCurrentKey; 1282 Message msg = mHandler.obtainMessage(MSG_REPEAT); 1283 mHandler.sendMessageDelayed(msg, REPEAT_START_DELAY); 1284 repeatKey(); 1285 // Delivering the key could have caused an abort 1286 if (mAbortKey) { 1287 mRepeatKeyIndex = NOT_A_KEY; 1288 break; 1289 } 1290 } 1291 if (mCurrentKey != NOT_A_KEY) { 1292 Message msg = mHandler.obtainMessage(MSG_LONGPRESS, me); 1293 mHandler.sendMessageDelayed(msg, LONGPRESS_TIMEOUT); 1294 } 1295 showPreview(keyIndex); 1296 break; 1297 1298 case MotionEvent.ACTION_MOVE: 1299 boolean continueLongPress = false; 1300 if (keyIndex != NOT_A_KEY) { 1301 if (mCurrentKey == NOT_A_KEY) { 1302 mCurrentKey = keyIndex; 1303 mCurrentKeyTime = eventTime - mDownTime; 1304 } else { 1305 if (keyIndex == mCurrentKey) { 1306 mCurrentKeyTime += eventTime - mLastMoveTime; 1307 continueLongPress = true; 1308 } else if (mRepeatKeyIndex == NOT_A_KEY) { 1309 resetMultiTap(); 1310 mLastKey = mCurrentKey; 1311 mLastCodeX = mLastX; 1312 mLastCodeY = mLastY; 1313 mLastKeyTime = 1314 mCurrentKeyTime + eventTime - mLastMoveTime; 1315 mCurrentKey = keyIndex; 1316 mCurrentKeyTime = 0; 1317 } 1318 } 1319 } 1320 if (!continueLongPress) { 1321 // Cancel old longpress 1322 mHandler.removeMessages(MSG_LONGPRESS); 1323 // Start new longpress if key has changed 1324 if (keyIndex != NOT_A_KEY) { 1325 Message msg = mHandler.obtainMessage(MSG_LONGPRESS, me); 1326 mHandler.sendMessageDelayed(msg, LONGPRESS_TIMEOUT); 1327 } 1328 } 1329 showPreview(mCurrentKey); 1330 mLastMoveTime = eventTime; 1331 break; 1332 1333 case MotionEvent.ACTION_UP: 1334 removeMessages(); 1335 if (keyIndex == mCurrentKey) { 1336 mCurrentKeyTime += eventTime - mLastMoveTime; 1337 } else { 1338 resetMultiTap(); 1339 mLastKey = mCurrentKey; 1340 mLastKeyTime = mCurrentKeyTime + eventTime - mLastMoveTime; 1341 mCurrentKey = keyIndex; 1342 mCurrentKeyTime = 0; 1343 } 1344 if (mCurrentKeyTime < mLastKeyTime && mCurrentKeyTime < DEBOUNCE_TIME 1345 && mLastKey != NOT_A_KEY) { 1346 mCurrentKey = mLastKey; 1347 touchX = mLastCodeX; 1348 touchY = mLastCodeY; 1349 } 1350 showPreview(NOT_A_KEY); 1351 Arrays.fill(mKeyIndices, NOT_A_KEY); 1352 // If we're not on a repeating key (which sends on a DOWN event) 1353 if (mRepeatKeyIndex == NOT_A_KEY && !mMiniKeyboardOnScreen && !mAbortKey) { 1354 detectAndSendKey(mCurrentKey, touchX, touchY, eventTime); 1355 } 1356 invalidateKey(keyIndex); 1357 mRepeatKeyIndex = NOT_A_KEY; 1358 break; 1359 case MotionEvent.ACTION_CANCEL: 1360 removeMessages(); 1361 dismissPopupKeyboard(); 1362 mAbortKey = true; 1363 showPreview(NOT_A_KEY); 1364 invalidateKey(mCurrentKey); 1365 break; 1366 } 1367 mLastX = touchX; 1368 mLastY = touchY; 1369 return true; 1370 } 1371 1372 @UnsupportedAppUsage repeatKey()1373 private boolean repeatKey() { 1374 Key key = mKeys[mRepeatKeyIndex]; 1375 detectAndSendKey(mCurrentKey, key.x, key.y, mLastTapTime); 1376 return true; 1377 } 1378 swipeRight()1379 protected void swipeRight() { 1380 mKeyboardActionListener.swipeRight(); 1381 } 1382 swipeLeft()1383 protected void swipeLeft() { 1384 mKeyboardActionListener.swipeLeft(); 1385 } 1386 swipeUp()1387 protected void swipeUp() { 1388 mKeyboardActionListener.swipeUp(); 1389 } 1390 swipeDown()1391 protected void swipeDown() { 1392 mKeyboardActionListener.swipeDown(); 1393 } 1394 closing()1395 public void closing() { 1396 if (mPreviewPopup.isShowing()) { 1397 mPreviewPopup.dismiss(); 1398 } 1399 removeMessages(); 1400 1401 dismissPopupKeyboard(); 1402 mBuffer = null; 1403 mCanvas = null; 1404 mMiniKeyboardCache.clear(); 1405 } 1406 removeMessages()1407 private void removeMessages() { 1408 if (mHandler != null) { 1409 mHandler.removeMessages(MSG_REPEAT); 1410 mHandler.removeMessages(MSG_LONGPRESS); 1411 mHandler.removeMessages(MSG_SHOW_PREVIEW); 1412 } 1413 } 1414 1415 @Override onDetachedFromWindow()1416 public void onDetachedFromWindow() { 1417 super.onDetachedFromWindow(); 1418 closing(); 1419 } 1420 dismissPopupKeyboard()1421 private void dismissPopupKeyboard() { 1422 if (mPopupKeyboard.isShowing()) { 1423 mPopupKeyboard.dismiss(); 1424 mMiniKeyboardOnScreen = false; 1425 invalidateAllKeys(); 1426 } 1427 } 1428 handleBack()1429 public boolean handleBack() { 1430 if (mPopupKeyboard.isShowing()) { 1431 dismissPopupKeyboard(); 1432 return true; 1433 } 1434 return false; 1435 } 1436 resetMultiTap()1437 private void resetMultiTap() { 1438 mLastSentIndex = NOT_A_KEY; 1439 mTapCount = 0; 1440 mLastTapTime = -1; 1441 mInMultiTap = false; 1442 } 1443 checkMultiTap(long eventTime, int keyIndex)1444 private void checkMultiTap(long eventTime, int keyIndex) { 1445 if (keyIndex == NOT_A_KEY) return; 1446 Key key = mKeys[keyIndex]; 1447 if (key.codes.length > 1) { 1448 mInMultiTap = true; 1449 if (eventTime < mLastTapTime + MULTITAP_INTERVAL 1450 && keyIndex == mLastSentIndex) { 1451 mTapCount = (mTapCount + 1) % key.codes.length; 1452 return; 1453 } else { 1454 mTapCount = -1; 1455 return; 1456 } 1457 } 1458 if (eventTime > mLastTapTime + MULTITAP_INTERVAL || keyIndex != mLastSentIndex) { 1459 resetMultiTap(); 1460 } 1461 } 1462 1463 private static class SwipeTracker { 1464 1465 static final int NUM_PAST = 4; 1466 static final int LONGEST_PAST_TIME = 200; 1467 1468 final float mPastX[] = new float[NUM_PAST]; 1469 final float mPastY[] = new float[NUM_PAST]; 1470 final long mPastTime[] = new long[NUM_PAST]; 1471 1472 float mYVelocity; 1473 float mXVelocity; 1474 clear()1475 public void clear() { 1476 mPastTime[0] = 0; 1477 } 1478 addMovement(MotionEvent ev)1479 public void addMovement(MotionEvent ev) { 1480 long time = ev.getEventTime(); 1481 final int N = ev.getHistorySize(); 1482 for (int i=0; i<N; i++) { 1483 addPoint(ev.getHistoricalX(i), ev.getHistoricalY(i), 1484 ev.getHistoricalEventTime(i)); 1485 } 1486 addPoint(ev.getX(), ev.getY(), time); 1487 } 1488 addPoint(float x, float y, long time)1489 private void addPoint(float x, float y, long time) { 1490 int drop = -1; 1491 int i; 1492 final long[] pastTime = mPastTime; 1493 for (i=0; i<NUM_PAST; i++) { 1494 if (pastTime[i] == 0) { 1495 break; 1496 } else if (pastTime[i] < time-LONGEST_PAST_TIME) { 1497 drop = i; 1498 } 1499 } 1500 if (i == NUM_PAST && drop < 0) { 1501 drop = 0; 1502 } 1503 if (drop == i) drop--; 1504 final float[] pastX = mPastX; 1505 final float[] pastY = mPastY; 1506 if (drop >= 0) { 1507 final int start = drop+1; 1508 final int count = NUM_PAST-drop-1; 1509 System.arraycopy(pastX, start, pastX, 0, count); 1510 System.arraycopy(pastY, start, pastY, 0, count); 1511 System.arraycopy(pastTime, start, pastTime, 0, count); 1512 i -= (drop+1); 1513 } 1514 pastX[i] = x; 1515 pastY[i] = y; 1516 pastTime[i] = time; 1517 i++; 1518 if (i < NUM_PAST) { 1519 pastTime[i] = 0; 1520 } 1521 } 1522 computeCurrentVelocity(int units)1523 public void computeCurrentVelocity(int units) { 1524 computeCurrentVelocity(units, Float.MAX_VALUE); 1525 } 1526 computeCurrentVelocity(int units, float maxVelocity)1527 public void computeCurrentVelocity(int units, float maxVelocity) { 1528 final float[] pastX = mPastX; 1529 final float[] pastY = mPastY; 1530 final long[] pastTime = mPastTime; 1531 1532 final float oldestX = pastX[0]; 1533 final float oldestY = pastY[0]; 1534 final long oldestTime = pastTime[0]; 1535 float accumX = 0; 1536 float accumY = 0; 1537 int N=0; 1538 while (N < NUM_PAST) { 1539 if (pastTime[N] == 0) { 1540 break; 1541 } 1542 N++; 1543 } 1544 1545 for (int i=1; i < N; i++) { 1546 final int dur = (int)(pastTime[i] - oldestTime); 1547 if (dur == 0) continue; 1548 float dist = pastX[i] - oldestX; 1549 float vel = (dist/dur) * units; // pixels/frame. 1550 if (accumX == 0) accumX = vel; 1551 else accumX = (accumX + vel) * .5f; 1552 1553 dist = pastY[i] - oldestY; 1554 vel = (dist/dur) * units; // pixels/frame. 1555 if (accumY == 0) accumY = vel; 1556 else accumY = (accumY + vel) * .5f; 1557 } 1558 mXVelocity = accumX < 0.0f ? Math.max(accumX, -maxVelocity) 1559 : Math.min(accumX, maxVelocity); 1560 mYVelocity = accumY < 0.0f ? Math.max(accumY, -maxVelocity) 1561 : Math.min(accumY, maxVelocity); 1562 } 1563 1564 public float getXVelocity() { 1565 return mXVelocity; 1566 } 1567 1568 public float getYVelocity() { 1569 return mYVelocity; 1570 } 1571 } 1572 } 1573