Editor.java revision e301746a0e393bdb1a8042e36c368fb03c49ae71
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.IntDef; 21import android.annotation.NonNull; 22import android.annotation.Nullable; 23import android.app.PendingIntent; 24import android.app.PendingIntent.CanceledException; 25import android.content.ClipData; 26import android.content.ClipData.Item; 27import android.content.Context; 28import android.content.Intent; 29import android.content.UndoManager; 30import android.content.UndoOperation; 31import android.content.UndoOwner; 32import android.content.pm.PackageManager; 33import android.content.pm.ResolveInfo; 34import android.content.res.TypedArray; 35import android.graphics.Canvas; 36import android.graphics.Color; 37import android.graphics.Matrix; 38import android.graphics.Paint; 39import android.graphics.Path; 40import android.graphics.PointF; 41import android.graphics.Rect; 42import android.graphics.RectF; 43import android.graphics.drawable.ColorDrawable; 44import android.graphics.drawable.Drawable; 45import android.os.Bundle; 46import android.os.LocaleList; 47import android.os.Parcel; 48import android.os.Parcelable; 49import android.os.ParcelableParcel; 50import android.os.SystemClock; 51import android.provider.Settings; 52import android.text.DynamicLayout; 53import android.text.Editable; 54import android.text.InputFilter; 55import android.text.InputType; 56import android.text.Layout; 57import android.text.ParcelableSpan; 58import android.text.Selection; 59import android.text.SpanWatcher; 60import android.text.Spannable; 61import android.text.SpannableStringBuilder; 62import android.text.Spanned; 63import android.text.StaticLayout; 64import android.text.TextUtils; 65import android.text.method.KeyListener; 66import android.text.method.MetaKeyKeyListener; 67import android.text.method.MovementMethod; 68import android.text.method.WordIterator; 69import android.text.style.EasyEditSpan; 70import android.text.style.SuggestionRangeSpan; 71import android.text.style.SuggestionSpan; 72import android.text.style.TextAppearanceSpan; 73import android.text.style.URLSpan; 74import android.util.ArraySet; 75import android.util.DisplayMetrics; 76import android.util.Log; 77import android.util.SparseArray; 78import android.view.ActionMode; 79import android.view.ActionMode.Callback; 80import android.view.ContextMenu; 81import android.view.ContextThemeWrapper; 82import android.view.DisplayListCanvas; 83import android.view.DragAndDropPermissions; 84import android.view.DragEvent; 85import android.view.Gravity; 86import android.view.HapticFeedbackConstants; 87import android.view.InputDevice; 88import android.view.LayoutInflater; 89import android.view.Menu; 90import android.view.MenuItem; 91import android.view.MotionEvent; 92import android.view.RenderNode; 93import android.view.SubMenu; 94import android.view.View; 95import android.view.View.DragShadowBuilder; 96import android.view.View.OnClickListener; 97import android.view.ViewConfiguration; 98import android.view.ViewGroup; 99import android.view.ViewGroup.LayoutParams; 100import android.view.ViewTreeObserver; 101import android.view.WindowManager; 102import android.view.accessibility.AccessibilityNodeInfo; 103import android.view.inputmethod.CorrectionInfo; 104import android.view.inputmethod.CursorAnchorInfo; 105import android.view.inputmethod.EditorInfo; 106import android.view.inputmethod.ExtractedText; 107import android.view.inputmethod.ExtractedTextRequest; 108import android.view.inputmethod.InputConnection; 109import android.view.inputmethod.InputMethodManager; 110import android.view.textclassifier.TextClassification; 111import android.view.textclassifier.TextClassificationManager; 112import android.widget.AdapterView.OnItemClickListener; 113import android.widget.TextView.Drawables; 114import android.widget.TextView.OnEditorActionListener; 115 116import com.android.internal.annotations.VisibleForTesting; 117import com.android.internal.logging.MetricsLogger; 118import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 119import com.android.internal.util.ArrayUtils; 120import com.android.internal.util.GrowingArrayUtils; 121import com.android.internal.util.Preconditions; 122import com.android.internal.widget.EditableInputConnection; 123 124import java.lang.annotation.Retention; 125import java.lang.annotation.RetentionPolicy; 126import java.text.BreakIterator; 127import java.util.ArrayList; 128import java.util.Arrays; 129import java.util.Comparator; 130import java.util.HashMap; 131import java.util.List; 132import java.util.Map; 133 134/** 135 * Helper class used by TextView to handle editable text views. 136 * 137 * @hide 138 */ 139public class Editor { 140 private static final String TAG = "Editor"; 141 private static final boolean DEBUG_UNDO = false; 142 // Specifies whether to use or not the magnifier when pressing the insertion or selection 143 // handles. 144 private static final boolean FLAG_USE_MAGNIFIER = true; 145 146 static final int BLINK = 500; 147 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 148 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 149 private static final int UNSET_X_VALUE = -1; 150 private static final int UNSET_LINE = -1; 151 // Tag used when the Editor maintains its own separate UndoManager. 152 private static final String UNDO_OWNER_TAG = "Editor"; 153 154 // Ordering constants used to place the Action Mode or context menu items in their menu. 155 private static final int MENU_ITEM_ORDER_ASSIST = 0; 156 private static final int MENU_ITEM_ORDER_UNDO = 2; 157 private static final int MENU_ITEM_ORDER_REDO = 3; 158 private static final int MENU_ITEM_ORDER_CUT = 4; 159 private static final int MENU_ITEM_ORDER_COPY = 5; 160 private static final int MENU_ITEM_ORDER_PASTE = 6; 161 private static final int MENU_ITEM_ORDER_SHARE = 7; 162 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 163 private static final int MENU_ITEM_ORDER_REPLACE = 9; 164 private static final int MENU_ITEM_ORDER_AUTOFILL = 10; 165 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 11; 166 private static final int MENU_ITEM_ORDER_SECONDARY_ASSIST_ACTIONS_START = 50; 167 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 168 169 @IntDef({MagnifierHandleTrigger.SELECTION_START, 170 MagnifierHandleTrigger.SELECTION_END, 171 MagnifierHandleTrigger.INSERTION}) 172 @Retention(RetentionPolicy.SOURCE) 173 private @interface MagnifierHandleTrigger { 174 int INSERTION = 0; 175 int SELECTION_START = 1; 176 int SELECTION_END = 2; 177 } 178 179 @IntDef({TextActionMode.SELECTION, TextActionMode.INSERTION, TextActionMode.TEXT_LINK}) 180 @interface TextActionMode { 181 int SELECTION = 0; 182 int INSERTION = 1; 183 int TEXT_LINK = 2; 184 } 185 186 // Each Editor manages its own undo stack. 187 private final UndoManager mUndoManager = new UndoManager(); 188 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 189 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 190 boolean mAllowUndo = true; 191 192 private final MetricsLogger mMetricsLogger = new MetricsLogger(); 193 194 // Cursor Controllers. 195 private InsertionPointCursorController mInsertionPointCursorController; 196 SelectionModifierCursorController mSelectionModifierCursorController; 197 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 198 private ActionMode mTextActionMode; 199 private boolean mInsertionControllerEnabled; 200 private boolean mSelectionControllerEnabled; 201 202 private final boolean mHapticTextHandleEnabled; 203 204 private final Magnifier mMagnifier; 205 private final Runnable mUpdateMagnifierRunnable = new Runnable() { 206 @Override 207 public void run() { 208 mMagnifier.update(); 209 } 210 }; 211 // Update the magnifier contents whenever anything in the view hierarchy is updated. 212 // Note: this only captures UI thread-visible changes, so it's a known issue that an animating 213 // VectorDrawable or Ripple animation will not trigger capture, since they're owned by 214 // RenderThread. 215 private final ViewTreeObserver.OnDrawListener mMagnifierOnDrawListener = 216 new ViewTreeObserver.OnDrawListener() { 217 @Override 218 public void onDraw() { 219 if (mMagnifier != null) { 220 // Posting the method will ensure that updating the magnifier contents will 221 // happen right after the rendering of the current frame. 222 mTextView.post(mUpdateMagnifierRunnable); 223 } 224 } 225 }; 226 227 // Used to highlight a word when it is corrected by the IME 228 private CorrectionHighlighter mCorrectionHighlighter; 229 230 InputContentType mInputContentType; 231 InputMethodState mInputMethodState; 232 233 private static class TextRenderNode { 234 // Render node has 3 recording states: 235 // 1. Recorded operations are valid. 236 // #needsRecord() returns false, but needsToBeShifted is false. 237 // 2. Recorded operations are not valid, but just the position needed to be updated. 238 // #needsRecord() returns false, but needsToBeShifted is true. 239 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 240 // true. 241 RenderNode renderNode; 242 boolean isDirty; 243 // Becomes true when recorded operations can be reused, but the position has to be updated. 244 boolean needsToBeShifted; 245 public TextRenderNode(String name) { 246 renderNode = RenderNode.create(name, null); 247 isDirty = true; 248 needsToBeShifted = true; 249 } 250 boolean needsRecord() { 251 return isDirty || !renderNode.isValid(); 252 } 253 } 254 private TextRenderNode[] mTextRenderNodes; 255 256 boolean mFrozenWithFocus; 257 boolean mSelectionMoved; 258 boolean mTouchFocusSelected; 259 260 KeyListener mKeyListener; 261 int mInputType = EditorInfo.TYPE_NULL; 262 263 boolean mDiscardNextActionUp; 264 boolean mIgnoreActionUpEvent; 265 266 private long mShowCursor; 267 private boolean mRenderCursorRegardlessTiming; 268 private Blink mBlink; 269 270 boolean mCursorVisible = true; 271 boolean mSelectAllOnFocus; 272 boolean mTextIsSelectable; 273 274 CharSequence mError; 275 boolean mErrorWasChanged; 276 private ErrorPopup mErrorPopup; 277 278 /** 279 * This flag is set if the TextView tries to display an error before it 280 * is attached to the window (so its position is still unknown). 281 * It causes the error to be shown later, when onAttachedToWindow() 282 * is called. 283 */ 284 private boolean mShowErrorAfterAttach; 285 286 boolean mInBatchEditControllers; 287 boolean mShowSoftInputOnFocus = true; 288 private boolean mPreserveSelection; 289 private boolean mRestartActionModeOnNextRefresh; 290 291 private SelectionActionModeHelper mSelectionActionModeHelper; 292 293 boolean mIsBeingLongClicked; 294 295 private SuggestionsPopupWindow mSuggestionsPopupWindow; 296 SuggestionRangeSpan mSuggestionRangeSpan; 297 private Runnable mShowSuggestionRunnable; 298 299 Drawable mDrawableForCursor = null; 300 301 private Drawable mSelectHandleLeft; 302 private Drawable mSelectHandleRight; 303 private Drawable mSelectHandleCenter; 304 305 // Global listener that detects changes in the global position of the TextView 306 private PositionListener mPositionListener; 307 308 private float mLastDownPositionX, mLastDownPositionY; 309 private float mLastUpPositionX, mLastUpPositionY; 310 private float mContextMenuAnchorX, mContextMenuAnchorY; 311 Callback mCustomSelectionActionModeCallback; 312 Callback mCustomInsertionActionModeCallback; 313 314 // Set when this TextView gained focus with some text selected. Will start selection mode. 315 boolean mCreatedWithASelection; 316 317 // Indicates the current tap state (first tap, double tap, or triple click). 318 private int mTapState = TAP_STATE_INITIAL; 319 private long mLastTouchUpTime = 0; 320 private static final int TAP_STATE_INITIAL = 0; 321 private static final int TAP_STATE_FIRST_TAP = 1; 322 private static final int TAP_STATE_DOUBLE_TAP = 2; 323 // Only for mouse input. 324 private static final int TAP_STATE_TRIPLE_CLICK = 3; 325 326 // The button state as of the last time #onTouchEvent is called. 327 private int mLastButtonState; 328 329 private Runnable mInsertionActionModeRunnable; 330 331 // The span controller helps monitoring the changes to which the Editor needs to react: 332 // - EasyEditSpans, for which we have some UI to display on attach and on hide 333 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 334 private SpanController mSpanController; 335 336 private WordIterator mWordIterator; 337 SpellChecker mSpellChecker; 338 339 // This word iterator is set with text and used to determine word boundaries 340 // when a user is selecting text. 341 private WordIterator mWordIteratorWithText; 342 // Indicate that the text in the word iterator needs to be updated. 343 private boolean mUpdateWordIteratorText; 344 345 private Rect mTempRect; 346 347 private final TextView mTextView; 348 349 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 350 351 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 352 new CursorAnchorInfoNotifier(); 353 354 private final Runnable mShowFloatingToolbar = new Runnable() { 355 @Override 356 public void run() { 357 if (mTextActionMode != null) { 358 mTextActionMode.hide(0); // hide off. 359 } 360 } 361 }; 362 363 boolean mIsInsertionActionModeStartPending = false; 364 365 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 366 367 Editor(TextView textView) { 368 mTextView = textView; 369 // Synchronize the filter list, which places the undo input filter at the end. 370 mTextView.setFilters(mTextView.getFilters()); 371 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 372 mHapticTextHandleEnabled = mTextView.getContext().getResources().getBoolean( 373 com.android.internal.R.bool.config_enableHapticTextHandle); 374 375 mMagnifier = FLAG_USE_MAGNIFIER ? new Magnifier(mTextView) : null; 376 } 377 378 ParcelableParcel saveInstanceState() { 379 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 380 Parcel parcel = state.getParcel(); 381 mUndoManager.saveInstanceState(parcel); 382 mUndoInputFilter.saveInstanceState(parcel); 383 return state; 384 } 385 386 void restoreInstanceState(ParcelableParcel state) { 387 Parcel parcel = state.getParcel(); 388 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 389 mUndoInputFilter.restoreInstanceState(parcel); 390 // Re-associate this object as the owner of undo state. 391 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 392 } 393 394 /** 395 * Forgets all undo and redo operations for this Editor. 396 */ 397 void forgetUndoRedo() { 398 UndoOwner[] owners = { mUndoOwner }; 399 mUndoManager.forgetUndos(owners, -1 /* all */); 400 mUndoManager.forgetRedos(owners, -1 /* all */); 401 } 402 403 boolean canUndo() { 404 UndoOwner[] owners = { mUndoOwner }; 405 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 406 } 407 408 boolean canRedo() { 409 UndoOwner[] owners = { mUndoOwner }; 410 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 411 } 412 413 void undo() { 414 if (!mAllowUndo) { 415 return; 416 } 417 UndoOwner[] owners = { mUndoOwner }; 418 mUndoManager.undo(owners, 1); // Undo 1 action. 419 } 420 421 void redo() { 422 if (!mAllowUndo) { 423 return; 424 } 425 UndoOwner[] owners = { mUndoOwner }; 426 mUndoManager.redo(owners, 1); // Redo 1 action. 427 } 428 429 void replace() { 430 if (mSuggestionsPopupWindow == null) { 431 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 432 } 433 hideCursorAndSpanControllers(); 434 mSuggestionsPopupWindow.show(); 435 436 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 437 Selection.setSelection((Spannable) mTextView.getText(), middle); 438 } 439 440 void onAttachedToWindow() { 441 if (mShowErrorAfterAttach) { 442 showError(); 443 mShowErrorAfterAttach = false; 444 } 445 446 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 447 if (observer.isAlive()) { 448 // No need to create the controller. 449 // The get method will add the listener on controller creation. 450 if (mInsertionPointCursorController != null) { 451 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 452 } 453 if (mSelectionModifierCursorController != null) { 454 mSelectionModifierCursorController.resetTouchOffsets(); 455 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 456 } 457 if (FLAG_USE_MAGNIFIER) { 458 observer.addOnDrawListener(mMagnifierOnDrawListener); 459 } 460 } 461 462 updateSpellCheckSpans(0, mTextView.getText().length(), 463 true /* create the spell checker if needed */); 464 465 if (mTextView.hasSelection()) { 466 refreshTextActionMode(); 467 } 468 469 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 470 resumeBlink(); 471 } 472 473 void onDetachedFromWindow() { 474 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 475 476 if (mError != null) { 477 hideError(); 478 } 479 480 suspendBlink(); 481 482 if (mInsertionPointCursorController != null) { 483 mInsertionPointCursorController.onDetached(); 484 } 485 486 if (mSelectionModifierCursorController != null) { 487 mSelectionModifierCursorController.onDetached(); 488 } 489 490 if (mShowSuggestionRunnable != null) { 491 mTextView.removeCallbacks(mShowSuggestionRunnable); 492 } 493 494 // Cancel the single tap delayed runnable. 495 if (mInsertionActionModeRunnable != null) { 496 mTextView.removeCallbacks(mInsertionActionModeRunnable); 497 } 498 499 mTextView.removeCallbacks(mShowFloatingToolbar); 500 501 discardTextDisplayLists(); 502 503 if (mSpellChecker != null) { 504 mSpellChecker.closeSession(); 505 // Forces the creation of a new SpellChecker next time this window is created. 506 // Will handle the cases where the settings has been changed in the meantime. 507 mSpellChecker = null; 508 } 509 510 if (FLAG_USE_MAGNIFIER) { 511 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 512 if (observer.isAlive()) { 513 observer.removeOnDrawListener(mMagnifierOnDrawListener); 514 } 515 } 516 517 hideCursorAndSpanControllers(); 518 stopTextActionModeWithPreservingSelection(); 519 } 520 521 private void discardTextDisplayLists() { 522 if (mTextRenderNodes != null) { 523 for (int i = 0; i < mTextRenderNodes.length; i++) { 524 RenderNode displayList = mTextRenderNodes[i] != null 525 ? mTextRenderNodes[i].renderNode : null; 526 if (displayList != null && displayList.isValid()) { 527 displayList.discardDisplayList(); 528 } 529 } 530 } 531 } 532 533 private void showError() { 534 if (mTextView.getWindowToken() == null) { 535 mShowErrorAfterAttach = true; 536 return; 537 } 538 539 if (mErrorPopup == null) { 540 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 541 final TextView err = (TextView) inflater.inflate( 542 com.android.internal.R.layout.textview_hint, null); 543 544 final float scale = mTextView.getResources().getDisplayMetrics().density; 545 mErrorPopup = 546 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 547 mErrorPopup.setFocusable(false); 548 // The user is entering text, so the input method is needed. We 549 // don't want the popup to be displayed on top of it. 550 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 551 } 552 553 TextView tv = (TextView) mErrorPopup.getContentView(); 554 chooseSize(mErrorPopup, mError, tv); 555 tv.setText(mError); 556 557 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY(), 558 Gravity.TOP | Gravity.LEFT); 559 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 560 } 561 562 public void setError(CharSequence error, Drawable icon) { 563 mError = TextUtils.stringOrSpannedString(error); 564 mErrorWasChanged = true; 565 566 if (mError == null) { 567 setErrorIcon(null); 568 if (mErrorPopup != null) { 569 if (mErrorPopup.isShowing()) { 570 mErrorPopup.dismiss(); 571 } 572 573 mErrorPopup = null; 574 } 575 mShowErrorAfterAttach = false; 576 } else { 577 setErrorIcon(icon); 578 if (mTextView.isFocused()) { 579 showError(); 580 } 581 } 582 } 583 584 private void setErrorIcon(Drawable icon) { 585 Drawables dr = mTextView.mDrawables; 586 if (dr == null) { 587 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 588 } 589 dr.setErrorDrawable(icon, mTextView); 590 591 mTextView.resetResolvedDrawables(); 592 mTextView.invalidate(); 593 mTextView.requestLayout(); 594 } 595 596 private void hideError() { 597 if (mErrorPopup != null) { 598 if (mErrorPopup.isShowing()) { 599 mErrorPopup.dismiss(); 600 } 601 } 602 603 mShowErrorAfterAttach = false; 604 } 605 606 /** 607 * Returns the X offset to make the pointy top of the error point 608 * at the middle of the error icon. 609 */ 610 private int getErrorX() { 611 /* 612 * The "25" is the distance between the point and the right edge 613 * of the background 614 */ 615 final float scale = mTextView.getResources().getDisplayMetrics().density; 616 617 final Drawables dr = mTextView.mDrawables; 618 619 final int layoutDirection = mTextView.getLayoutDirection(); 620 int errorX; 621 int offset; 622 switch (layoutDirection) { 623 default: 624 case View.LAYOUT_DIRECTION_LTR: 625 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 626 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 627 - mTextView.getPaddingRight() + offset; 628 break; 629 case View.LAYOUT_DIRECTION_RTL: 630 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 631 errorX = mTextView.getPaddingLeft() + offset; 632 break; 633 } 634 return errorX; 635 } 636 637 /** 638 * Returns the Y offset to make the pointy top of the error point 639 * at the bottom of the error icon. 640 */ 641 private int getErrorY() { 642 /* 643 * Compound, not extended, because the icon is not clipped 644 * if the text height is smaller. 645 */ 646 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 647 int vspace = mTextView.getBottom() - mTextView.getTop() 648 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 649 650 final Drawables dr = mTextView.mDrawables; 651 652 final int layoutDirection = mTextView.getLayoutDirection(); 653 int height; 654 switch (layoutDirection) { 655 default: 656 case View.LAYOUT_DIRECTION_LTR: 657 height = (dr != null ? dr.mDrawableHeightRight : 0); 658 break; 659 case View.LAYOUT_DIRECTION_RTL: 660 height = (dr != null ? dr.mDrawableHeightLeft : 0); 661 break; 662 } 663 664 int icontop = compoundPaddingTop + (vspace - height) / 2; 665 666 /* 667 * The "2" is the distance between the point and the top edge 668 * of the background. 669 */ 670 final float scale = mTextView.getResources().getDisplayMetrics().density; 671 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 672 } 673 674 void createInputContentTypeIfNeeded() { 675 if (mInputContentType == null) { 676 mInputContentType = new InputContentType(); 677 } 678 } 679 680 void createInputMethodStateIfNeeded() { 681 if (mInputMethodState == null) { 682 mInputMethodState = new InputMethodState(); 683 } 684 } 685 686 private boolean isCursorVisible() { 687 // The default value is true, even when there is no associated Editor 688 return mCursorVisible && mTextView.isTextEditable(); 689 } 690 691 boolean shouldRenderCursor() { 692 if (!isCursorVisible()) { 693 return false; 694 } 695 if (mRenderCursorRegardlessTiming) { 696 return true; 697 } 698 final long showCursorDelta = SystemClock.uptimeMillis() - mShowCursor; 699 return showCursorDelta % (2 * BLINK) < BLINK; 700 } 701 702 void prepareCursorControllers() { 703 boolean windowSupportsHandles = false; 704 705 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 706 if (params instanceof WindowManager.LayoutParams) { 707 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 708 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 709 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 710 } 711 712 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 713 mInsertionControllerEnabled = enabled && isCursorVisible(); 714 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 715 716 if (!mInsertionControllerEnabled) { 717 hideInsertionPointCursorController(); 718 if (mInsertionPointCursorController != null) { 719 mInsertionPointCursorController.onDetached(); 720 mInsertionPointCursorController = null; 721 } 722 } 723 724 if (!mSelectionControllerEnabled) { 725 stopTextActionMode(); 726 if (mSelectionModifierCursorController != null) { 727 mSelectionModifierCursorController.onDetached(); 728 mSelectionModifierCursorController = null; 729 } 730 } 731 } 732 733 void hideInsertionPointCursorController() { 734 if (mInsertionPointCursorController != null) { 735 mInsertionPointCursorController.hide(); 736 } 737 } 738 739 /** 740 * Hides the insertion and span controllers. 741 */ 742 void hideCursorAndSpanControllers() { 743 hideCursorControllers(); 744 hideSpanControllers(); 745 } 746 747 private void hideSpanControllers() { 748 if (mSpanController != null) { 749 mSpanController.hide(); 750 } 751 } 752 753 private void hideCursorControllers() { 754 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 755 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 756 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 757 // to distinguish one from the other. 758 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 759 || !mSuggestionsPopupWindow.isShowingUp())) { 760 // Should be done before hide insertion point controller since it triggers a show of it 761 mSuggestionsPopupWindow.hide(); 762 } 763 hideInsertionPointCursorController(); 764 } 765 766 /** 767 * Create new SpellCheckSpans on the modified region. 768 */ 769 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 770 // Remove spans whose adjacent characters are text not punctuation 771 mTextView.removeAdjacentSuggestionSpans(start); 772 mTextView.removeAdjacentSuggestionSpans(end); 773 774 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 775 && !(mTextView.isInExtractedMode())) { 776 if (mSpellChecker == null && createSpellChecker) { 777 mSpellChecker = new SpellChecker(mTextView); 778 } 779 if (mSpellChecker != null) { 780 mSpellChecker.spellCheck(start, end); 781 } 782 } 783 } 784 785 void onScreenStateChanged(int screenState) { 786 switch (screenState) { 787 case View.SCREEN_STATE_ON: 788 resumeBlink(); 789 break; 790 case View.SCREEN_STATE_OFF: 791 suspendBlink(); 792 break; 793 } 794 } 795 796 private void suspendBlink() { 797 if (mBlink != null) { 798 mBlink.cancel(); 799 } 800 } 801 802 private void resumeBlink() { 803 if (mBlink != null) { 804 mBlink.uncancel(); 805 makeBlink(); 806 } 807 } 808 809 void adjustInputType(boolean password, boolean passwordInputType, 810 boolean webPasswordInputType, boolean numberPasswordInputType) { 811 // mInputType has been set from inputType, possibly modified by mInputMethod. 812 // Specialize mInputType to [web]password if we have a text class and the original input 813 // type was a password. 814 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 815 if (password || passwordInputType) { 816 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 817 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 818 } 819 if (webPasswordInputType) { 820 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 821 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 822 } 823 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 824 if (numberPasswordInputType) { 825 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 826 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 827 } 828 } 829 } 830 831 private void chooseSize(@NonNull PopupWindow pop, @NonNull CharSequence text, 832 @NonNull TextView tv) { 833 final int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 834 final int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 835 836 final int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 837 com.android.internal.R.dimen.textview_error_popup_default_width); 838 final StaticLayout l = StaticLayout.Builder.obtain(text, 0, text.length(), tv.getPaint(), 839 defaultWidthInPixels) 840 .setUseLineSpacingFromFallbacks(tv.mUseFallbackLineSpacing) 841 .build(); 842 843 float max = 0; 844 for (int i = 0; i < l.getLineCount(); i++) { 845 max = Math.max(max, l.getLineWidth(i)); 846 } 847 848 /* 849 * Now set the popup size to be big enough for the text plus the border capped 850 * to DEFAULT_MAX_POPUP_WIDTH 851 */ 852 pop.setWidth(wid + (int) Math.ceil(max)); 853 pop.setHeight(ht + l.getHeight()); 854 } 855 856 void setFrame() { 857 if (mErrorPopup != null) { 858 TextView tv = (TextView) mErrorPopup.getContentView(); 859 chooseSize(mErrorPopup, mError, tv); 860 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 861 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 862 } 863 } 864 865 private int getWordStart(int offset) { 866 // FIXME - For this and similar methods we're not doing anything to check if there's 867 // a LocaleSpan in the text, this may be something we should try handling or checking for. 868 int retOffset = getWordIteratorWithText().prevBoundary(offset); 869 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 870 // On punctuation boundary or within group of punctuation, find punctuation start. 871 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 872 } else { 873 // Not on a punctuation boundary, find the word start. 874 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 875 } 876 if (retOffset == BreakIterator.DONE) { 877 return offset; 878 } 879 return retOffset; 880 } 881 882 private int getWordEnd(int offset) { 883 int retOffset = getWordIteratorWithText().nextBoundary(offset); 884 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 885 // On punctuation boundary or within group of punctuation, find punctuation end. 886 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 887 } else { 888 // Not on a punctuation boundary, find the word end. 889 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 890 } 891 if (retOffset == BreakIterator.DONE) { 892 return offset; 893 } 894 return retOffset; 895 } 896 897 private boolean needsToSelectAllToSelectWordOrParagraph() { 898 if (mTextView.hasPasswordTransformationMethod()) { 899 // Always select all on a password field. 900 // Cut/copy menu entries are not available for passwords, but being able to select all 901 // is however useful to delete or paste to replace the entire content. 902 return true; 903 } 904 905 int inputType = mTextView.getInputType(); 906 int klass = inputType & InputType.TYPE_MASK_CLASS; 907 int variation = inputType & InputType.TYPE_MASK_VARIATION; 908 909 // Specific text field types: select the entire text for these 910 if (klass == InputType.TYPE_CLASS_NUMBER 911 || klass == InputType.TYPE_CLASS_PHONE 912 || klass == InputType.TYPE_CLASS_DATETIME 913 || variation == InputType.TYPE_TEXT_VARIATION_URI 914 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 915 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 916 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 917 return true; 918 } 919 return false; 920 } 921 922 /** 923 * Adjusts selection to the word under last touch offset. Return true if the operation was 924 * successfully performed. 925 */ 926 boolean selectCurrentWord() { 927 if (!mTextView.canSelectText()) { 928 return false; 929 } 930 931 if (needsToSelectAllToSelectWordOrParagraph()) { 932 return mTextView.selectAllText(); 933 } 934 935 long lastTouchOffsets = getLastTouchOffsets(); 936 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 937 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 938 939 // Safety check in case standard touch event handling has been bypassed 940 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 941 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 942 943 int selectionStart, selectionEnd; 944 945 // If a URLSpan (web address, email, phone...) is found at that position, select it. 946 URLSpan[] urlSpans = 947 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 948 if (urlSpans.length >= 1) { 949 URLSpan urlSpan = urlSpans[0]; 950 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 951 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 952 } else { 953 // FIXME - We should check if there's a LocaleSpan in the text, this may be 954 // something we should try handling or checking for. 955 final WordIterator wordIterator = getWordIterator(); 956 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 957 958 selectionStart = wordIterator.getBeginning(minOffset); 959 selectionEnd = wordIterator.getEnd(maxOffset); 960 961 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 962 || selectionStart == selectionEnd) { 963 // Possible when the word iterator does not properly handle the text's language 964 long range = getCharClusterRange(minOffset); 965 selectionStart = TextUtils.unpackRangeStartFromLong(range); 966 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 967 } 968 } 969 970 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 971 return selectionEnd > selectionStart; 972 } 973 974 /** 975 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 976 * successfully performed. 977 */ 978 private boolean selectCurrentParagraph() { 979 if (!mTextView.canSelectText()) { 980 return false; 981 } 982 983 if (needsToSelectAllToSelectWordOrParagraph()) { 984 return mTextView.selectAllText(); 985 } 986 987 long lastTouchOffsets = getLastTouchOffsets(); 988 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 989 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 990 991 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 992 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 993 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 994 if (start < end) { 995 Selection.setSelection((Spannable) mTextView.getText(), start, end); 996 return true; 997 } 998 return false; 999 } 1000 1001 /** 1002 * Get the minimum range of paragraphs that contains startOffset and endOffset. 1003 */ 1004 private long getParagraphsRange(int startOffset, int endOffset) { 1005 final Layout layout = mTextView.getLayout(); 1006 if (layout == null) { 1007 return TextUtils.packRangeInLong(-1, -1); 1008 } 1009 final CharSequence text = mTextView.getText(); 1010 int minLine = layout.getLineForOffset(startOffset); 1011 // Search paragraph start. 1012 while (minLine > 0) { 1013 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 1014 if (text.charAt(prevLineEndOffset - 1) == '\n') { 1015 break; 1016 } 1017 minLine--; 1018 } 1019 int maxLine = layout.getLineForOffset(endOffset); 1020 // Search paragraph end. 1021 while (maxLine < layout.getLineCount() - 1) { 1022 final int lineEndOffset = layout.getLineEnd(maxLine); 1023 if (text.charAt(lineEndOffset - 1) == '\n') { 1024 break; 1025 } 1026 maxLine++; 1027 } 1028 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 1029 } 1030 1031 void onLocaleChanged() { 1032 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 1033 // proper new locale 1034 mWordIterator = null; 1035 mWordIteratorWithText = null; 1036 } 1037 1038 public WordIterator getWordIterator() { 1039 if (mWordIterator == null) { 1040 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 1041 } 1042 return mWordIterator; 1043 } 1044 1045 private WordIterator getWordIteratorWithText() { 1046 if (mWordIteratorWithText == null) { 1047 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 1048 mUpdateWordIteratorText = true; 1049 } 1050 if (mUpdateWordIteratorText) { 1051 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 1052 // to the user's selection is needed. A possible solution would be to 1053 // copy some number N of characters near the selection and then when the 1054 // user approaches N then we'd do another copy of the next N characters. 1055 CharSequence text = mTextView.getText(); 1056 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 1057 mUpdateWordIteratorText = false; 1058 } 1059 return mWordIteratorWithText; 1060 } 1061 1062 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 1063 final Layout layout = mTextView.getLayout(); 1064 if (layout == null) return offset; 1065 return findAfterGivenOffset == layout.isRtlCharAt(offset) 1066 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 1067 } 1068 1069 private long getCharClusterRange(int offset) { 1070 final int textLength = mTextView.getText().length(); 1071 if (offset < textLength) { 1072 final int clusterEndOffset = getNextCursorOffset(offset, true); 1073 return TextUtils.packRangeInLong( 1074 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 1075 } 1076 if (offset - 1 >= 0) { 1077 final int clusterStartOffset = getNextCursorOffset(offset, false); 1078 return TextUtils.packRangeInLong(clusterStartOffset, 1079 getNextCursorOffset(clusterStartOffset, true)); 1080 } 1081 return TextUtils.packRangeInLong(offset, offset); 1082 } 1083 1084 private boolean touchPositionIsInSelection() { 1085 int selectionStart = mTextView.getSelectionStart(); 1086 int selectionEnd = mTextView.getSelectionEnd(); 1087 1088 if (selectionStart == selectionEnd) { 1089 return false; 1090 } 1091 1092 if (selectionStart > selectionEnd) { 1093 int tmp = selectionStart; 1094 selectionStart = selectionEnd; 1095 selectionEnd = tmp; 1096 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1097 } 1098 1099 SelectionModifierCursorController selectionController = getSelectionController(); 1100 int minOffset = selectionController.getMinTouchOffset(); 1101 int maxOffset = selectionController.getMaxTouchOffset(); 1102 1103 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1104 } 1105 1106 private PositionListener getPositionListener() { 1107 if (mPositionListener == null) { 1108 mPositionListener = new PositionListener(); 1109 } 1110 return mPositionListener; 1111 } 1112 1113 private interface TextViewPositionListener { 1114 public void updatePosition(int parentPositionX, int parentPositionY, 1115 boolean parentPositionChanged, boolean parentScrolled); 1116 } 1117 1118 private boolean isOffsetVisible(int offset) { 1119 Layout layout = mTextView.getLayout(); 1120 if (layout == null) return false; 1121 1122 final int line = layout.getLineForOffset(offset); 1123 final int lineBottom = layout.getLineBottom(line); 1124 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1125 return mTextView.isPositionVisible( 1126 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1127 lineBottom + mTextView.viewportToContentVerticalOffset()); 1128 } 1129 1130 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1131 * in the view. Returns false when the position is in the empty space of left/right of text. 1132 */ 1133 private boolean isPositionOnText(float x, float y) { 1134 Layout layout = mTextView.getLayout(); 1135 if (layout == null) return false; 1136 1137 final int line = mTextView.getLineAtCoordinate(y); 1138 x = mTextView.convertToLocalHorizontalCoordinate(x); 1139 1140 if (x < layout.getLineLeft(line)) return false; 1141 if (x > layout.getLineRight(line)) return false; 1142 return true; 1143 } 1144 1145 private void startDragAndDrop() { 1146 getSelectionActionModeHelper().onSelectionDrag(); 1147 1148 // TODO: Fix drag and drop in full screen extracted mode. 1149 if (mTextView.isInExtractedMode()) { 1150 return; 1151 } 1152 final int start = mTextView.getSelectionStart(); 1153 final int end = mTextView.getSelectionEnd(); 1154 CharSequence selectedText = mTextView.getTransformedText(start, end); 1155 ClipData data = ClipData.newPlainText(null, selectedText); 1156 DragLocalState localState = new DragLocalState(mTextView, start, end); 1157 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1158 View.DRAG_FLAG_GLOBAL); 1159 stopTextActionMode(); 1160 if (hasSelectionController()) { 1161 getSelectionController().resetTouchOffsets(); 1162 } 1163 } 1164 1165 public boolean performLongClick(boolean handled) { 1166 // Long press in empty space moves cursor and starts the insertion action mode. 1167 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1168 && mInsertionControllerEnabled) { 1169 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1170 mLastDownPositionY); 1171 Selection.setSelection((Spannable) mTextView.getText(), offset); 1172 getInsertionController().show(); 1173 mIsInsertionActionModeStartPending = true; 1174 handled = true; 1175 MetricsLogger.action( 1176 mTextView.getContext(), 1177 MetricsEvent.TEXT_LONGPRESS, 1178 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1179 } 1180 1181 if (!handled && mTextActionMode != null) { 1182 if (touchPositionIsInSelection()) { 1183 startDragAndDrop(); 1184 MetricsLogger.action( 1185 mTextView.getContext(), 1186 MetricsEvent.TEXT_LONGPRESS, 1187 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1188 } else { 1189 stopTextActionMode(); 1190 selectCurrentWordAndStartDrag(); 1191 MetricsLogger.action( 1192 mTextView.getContext(), 1193 MetricsEvent.TEXT_LONGPRESS, 1194 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1195 } 1196 handled = true; 1197 } 1198 1199 // Start a new selection 1200 if (!handled) { 1201 handled = selectCurrentWordAndStartDrag(); 1202 if (handled) { 1203 MetricsLogger.action( 1204 mTextView.getContext(), 1205 MetricsEvent.TEXT_LONGPRESS, 1206 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1207 } 1208 } 1209 1210 return handled; 1211 } 1212 1213 float getLastUpPositionX() { 1214 return mLastUpPositionX; 1215 } 1216 1217 float getLastUpPositionY() { 1218 return mLastUpPositionY; 1219 } 1220 1221 private long getLastTouchOffsets() { 1222 SelectionModifierCursorController selectionController = getSelectionController(); 1223 final int minOffset = selectionController.getMinTouchOffset(); 1224 final int maxOffset = selectionController.getMaxTouchOffset(); 1225 return TextUtils.packRangeInLong(minOffset, maxOffset); 1226 } 1227 1228 void onFocusChanged(boolean focused, int direction) { 1229 mShowCursor = SystemClock.uptimeMillis(); 1230 ensureEndedBatchEdit(); 1231 1232 if (focused) { 1233 int selStart = mTextView.getSelectionStart(); 1234 int selEnd = mTextView.getSelectionEnd(); 1235 1236 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1237 // mode for these, unless there was a specific selection already started. 1238 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1239 && selEnd == mTextView.getText().length(); 1240 1241 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1242 && !isFocusHighlighted; 1243 1244 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1245 // If a tap was used to give focus to that view, move cursor at tap position. 1246 // Has to be done before onTakeFocus, which can be overloaded. 1247 final int lastTapPosition = getLastTapPosition(); 1248 if (lastTapPosition >= 0) { 1249 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1250 } 1251 1252 // Note this may have to be moved out of the Editor class 1253 MovementMethod mMovement = mTextView.getMovementMethod(); 1254 if (mMovement != null) { 1255 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1256 } 1257 1258 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1259 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1260 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1261 // This special case ensure that we keep current selection in that case. 1262 // It would be better to know why the DecorView does not have focus at that time. 1263 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1264 && selStart >= 0 && selEnd >= 0) { 1265 /* 1266 * Someone intentionally set the selection, so let them 1267 * do whatever it is that they wanted to do instead of 1268 * the default on-focus behavior. We reset the selection 1269 * here instead of just skipping the onTakeFocus() call 1270 * because some movement methods do something other than 1271 * just setting the selection in theirs and we still 1272 * need to go through that path. 1273 */ 1274 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1275 } 1276 1277 if (mSelectAllOnFocus) { 1278 mTextView.selectAllText(); 1279 } 1280 1281 mTouchFocusSelected = true; 1282 } 1283 1284 mFrozenWithFocus = false; 1285 mSelectionMoved = false; 1286 1287 if (mError != null) { 1288 showError(); 1289 } 1290 1291 makeBlink(); 1292 } else { 1293 if (mError != null) { 1294 hideError(); 1295 } 1296 // Don't leave us in the middle of a batch edit. 1297 mTextView.onEndBatchEdit(); 1298 1299 if (mTextView.isInExtractedMode()) { 1300 hideCursorAndSpanControllers(); 1301 stopTextActionModeWithPreservingSelection(); 1302 } else { 1303 hideCursorAndSpanControllers(); 1304 if (mTextView.isTemporarilyDetached()) { 1305 stopTextActionModeWithPreservingSelection(); 1306 } else { 1307 stopTextActionMode(); 1308 } 1309 downgradeEasyCorrectionSpans(); 1310 } 1311 // No need to create the controller 1312 if (mSelectionModifierCursorController != null) { 1313 mSelectionModifierCursorController.resetTouchOffsets(); 1314 } 1315 1316 ensureNoSelectionIfNonSelectable(); 1317 } 1318 } 1319 1320 private void ensureNoSelectionIfNonSelectable() { 1321 // This could be the case if a TextLink has been tapped. 1322 if (!mTextView.textCanBeSelected() && mTextView.hasSelection()) { 1323 Selection.setSelection((Spannable) mTextView.getText(), 1324 mTextView.length(), mTextView.length()); 1325 } 1326 } 1327 1328 /** 1329 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1330 * span. 1331 */ 1332 private void downgradeEasyCorrectionSpans() { 1333 CharSequence text = mTextView.getText(); 1334 if (text instanceof Spannable) { 1335 Spannable spannable = (Spannable) text; 1336 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1337 spannable.length(), SuggestionSpan.class); 1338 for (int i = 0; i < suggestionSpans.length; i++) { 1339 int flags = suggestionSpans[i].getFlags(); 1340 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1341 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1342 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1343 suggestionSpans[i].setFlags(flags); 1344 } 1345 } 1346 } 1347 } 1348 1349 void sendOnTextChanged(int start, int before, int after) { 1350 getSelectionActionModeHelper().onTextChanged(start, start + before); 1351 updateSpellCheckSpans(start, start + after, false); 1352 1353 // Flip flag to indicate the word iterator needs to have the text reset. 1354 mUpdateWordIteratorText = true; 1355 1356 // Hide the controllers as soon as text is modified (typing, procedural...) 1357 // We do not hide the span controllers, since they can be added when a new text is 1358 // inserted into the text view (voice IME). 1359 hideCursorControllers(); 1360 // Reset drag accelerator. 1361 if (mSelectionModifierCursorController != null) { 1362 mSelectionModifierCursorController.resetTouchOffsets(); 1363 } 1364 stopTextActionMode(); 1365 } 1366 1367 private int getLastTapPosition() { 1368 // No need to create the controller at that point, no last tap position saved 1369 if (mSelectionModifierCursorController != null) { 1370 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1371 if (lastTapPosition >= 0) { 1372 // Safety check, should not be possible. 1373 if (lastTapPosition > mTextView.getText().length()) { 1374 lastTapPosition = mTextView.getText().length(); 1375 } 1376 return lastTapPosition; 1377 } 1378 } 1379 1380 return -1; 1381 } 1382 1383 void onWindowFocusChanged(boolean hasWindowFocus) { 1384 if (hasWindowFocus) { 1385 if (mBlink != null) { 1386 mBlink.uncancel(); 1387 makeBlink(); 1388 } 1389 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1390 refreshTextActionMode(); 1391 } 1392 } else { 1393 if (mBlink != null) { 1394 mBlink.cancel(); 1395 } 1396 if (mInputContentType != null) { 1397 mInputContentType.enterDown = false; 1398 } 1399 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1400 hideCursorAndSpanControllers(); 1401 stopTextActionModeWithPreservingSelection(); 1402 if (mSuggestionsPopupWindow != null) { 1403 mSuggestionsPopupWindow.onParentLostFocus(); 1404 } 1405 1406 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1407 ensureEndedBatchEdit(); 1408 1409 ensureNoSelectionIfNonSelectable(); 1410 } 1411 } 1412 1413 private void updateTapState(MotionEvent event) { 1414 final int action = event.getActionMasked(); 1415 if (action == MotionEvent.ACTION_DOWN) { 1416 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1417 // Detect double tap and triple click. 1418 if (((mTapState == TAP_STATE_FIRST_TAP) 1419 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1420 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1421 <= ViewConfiguration.getDoubleTapTimeout()) { 1422 if (mTapState == TAP_STATE_FIRST_TAP) { 1423 mTapState = TAP_STATE_DOUBLE_TAP; 1424 } else { 1425 mTapState = TAP_STATE_TRIPLE_CLICK; 1426 } 1427 } else { 1428 mTapState = TAP_STATE_FIRST_TAP; 1429 } 1430 } 1431 if (action == MotionEvent.ACTION_UP) { 1432 mLastTouchUpTime = SystemClock.uptimeMillis(); 1433 } 1434 } 1435 1436 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1437 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1438 return false; 1439 } 1440 final boolean primaryButtonStateChanged = 1441 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1442 final int action = event.getActionMasked(); 1443 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1444 && !primaryButtonStateChanged) { 1445 return true; 1446 } 1447 if (action == MotionEvent.ACTION_MOVE 1448 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1449 return true; 1450 } 1451 return false; 1452 } 1453 1454 void onTouchEvent(MotionEvent event) { 1455 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1456 mLastButtonState = event.getButtonState(); 1457 if (filterOutEvent) { 1458 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1459 mDiscardNextActionUp = true; 1460 } 1461 return; 1462 } 1463 updateTapState(event); 1464 updateFloatingToolbarVisibility(event); 1465 1466 if (hasSelectionController()) { 1467 getSelectionController().onTouchEvent(event); 1468 } 1469 1470 if (mShowSuggestionRunnable != null) { 1471 mTextView.removeCallbacks(mShowSuggestionRunnable); 1472 mShowSuggestionRunnable = null; 1473 } 1474 1475 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1476 mLastUpPositionX = event.getX(); 1477 mLastUpPositionY = event.getY(); 1478 } 1479 1480 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1481 mLastDownPositionX = event.getX(); 1482 mLastDownPositionY = event.getY(); 1483 1484 // Reset this state; it will be re-set if super.onTouchEvent 1485 // causes focus to move to the view. 1486 mTouchFocusSelected = false; 1487 mIgnoreActionUpEvent = false; 1488 } 1489 } 1490 1491 private void updateFloatingToolbarVisibility(MotionEvent event) { 1492 if (mTextActionMode != null) { 1493 switch (event.getActionMasked()) { 1494 case MotionEvent.ACTION_MOVE: 1495 hideFloatingToolbar(ActionMode.DEFAULT_HIDE_DURATION); 1496 break; 1497 case MotionEvent.ACTION_UP: // fall through 1498 case MotionEvent.ACTION_CANCEL: 1499 showFloatingToolbar(); 1500 } 1501 } 1502 } 1503 1504 void hideFloatingToolbar(int duration) { 1505 if (mTextActionMode != null) { 1506 mTextView.removeCallbacks(mShowFloatingToolbar); 1507 mTextActionMode.hide(duration); 1508 } 1509 } 1510 1511 private void showFloatingToolbar() { 1512 if (mTextActionMode != null) { 1513 // Delay "show" so it doesn't interfere with click confirmations 1514 // or double-clicks that could "dismiss" the floating toolbar. 1515 int delay = ViewConfiguration.getDoubleTapTimeout(); 1516 mTextView.postDelayed(mShowFloatingToolbar, delay); 1517 1518 // This classifies the text and most likely returns before the toolbar is actually 1519 // shown. If not, it will update the toolbar with the result when classification 1520 // returns. We would rather not wait for a long running classification process. 1521 invalidateActionModeAsync(); 1522 } 1523 } 1524 1525 public void beginBatchEdit() { 1526 mInBatchEditControllers = true; 1527 final InputMethodState ims = mInputMethodState; 1528 if (ims != null) { 1529 int nesting = ++ims.mBatchEditNesting; 1530 if (nesting == 1) { 1531 ims.mCursorChanged = false; 1532 ims.mChangedDelta = 0; 1533 if (ims.mContentChanged) { 1534 // We already have a pending change from somewhere else, 1535 // so turn this into a full update. 1536 ims.mChangedStart = 0; 1537 ims.mChangedEnd = mTextView.getText().length(); 1538 } else { 1539 ims.mChangedStart = EXTRACT_UNKNOWN; 1540 ims.mChangedEnd = EXTRACT_UNKNOWN; 1541 ims.mContentChanged = false; 1542 } 1543 mUndoInputFilter.beginBatchEdit(); 1544 mTextView.onBeginBatchEdit(); 1545 } 1546 } 1547 } 1548 1549 public void endBatchEdit() { 1550 mInBatchEditControllers = false; 1551 final InputMethodState ims = mInputMethodState; 1552 if (ims != null) { 1553 int nesting = --ims.mBatchEditNesting; 1554 if (nesting == 0) { 1555 finishBatchEdit(ims); 1556 } 1557 } 1558 } 1559 1560 void ensureEndedBatchEdit() { 1561 final InputMethodState ims = mInputMethodState; 1562 if (ims != null && ims.mBatchEditNesting != 0) { 1563 ims.mBatchEditNesting = 0; 1564 finishBatchEdit(ims); 1565 } 1566 } 1567 1568 void finishBatchEdit(final InputMethodState ims) { 1569 mTextView.onEndBatchEdit(); 1570 mUndoInputFilter.endBatchEdit(); 1571 1572 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1573 mTextView.updateAfterEdit(); 1574 reportExtractedText(); 1575 } else if (ims.mCursorChanged) { 1576 // Cheesy way to get us to report the current cursor location. 1577 mTextView.invalidateCursor(); 1578 } 1579 // sendUpdateSelection knows to avoid sending if the selection did 1580 // not actually change. 1581 sendUpdateSelection(); 1582 1583 // Show drag handles if they were blocked by batch edit mode. 1584 if (mTextActionMode != null) { 1585 final CursorController cursorController = mTextView.hasSelection() 1586 ? getSelectionController() : getInsertionController(); 1587 if (cursorController != null && !cursorController.isActive() 1588 && !cursorController.isCursorBeingModified()) { 1589 cursorController.show(); 1590 } 1591 } 1592 } 1593 1594 static final int EXTRACT_NOTHING = -2; 1595 static final int EXTRACT_UNKNOWN = -1; 1596 1597 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1598 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1599 EXTRACT_UNKNOWN, outText); 1600 } 1601 1602 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1603 int partialStartOffset, int partialEndOffset, int delta, 1604 @Nullable ExtractedText outText) { 1605 if (request == null || outText == null) { 1606 return false; 1607 } 1608 1609 final CharSequence content = mTextView.getText(); 1610 if (content == null) { 1611 return false; 1612 } 1613 1614 if (partialStartOffset != EXTRACT_NOTHING) { 1615 final int N = content.length(); 1616 if (partialStartOffset < 0) { 1617 outText.partialStartOffset = outText.partialEndOffset = -1; 1618 partialStartOffset = 0; 1619 partialEndOffset = N; 1620 } else { 1621 // Now use the delta to determine the actual amount of text 1622 // we need. 1623 partialEndOffset += delta; 1624 // Adjust offsets to ensure we contain full spans. 1625 if (content instanceof Spanned) { 1626 Spanned spanned = (Spanned) content; 1627 Object[] spans = spanned.getSpans(partialStartOffset, 1628 partialEndOffset, ParcelableSpan.class); 1629 int i = spans.length; 1630 while (i > 0) { 1631 i--; 1632 int j = spanned.getSpanStart(spans[i]); 1633 if (j < partialStartOffset) partialStartOffset = j; 1634 j = spanned.getSpanEnd(spans[i]); 1635 if (j > partialEndOffset) partialEndOffset = j; 1636 } 1637 } 1638 outText.partialStartOffset = partialStartOffset; 1639 outText.partialEndOffset = partialEndOffset - delta; 1640 1641 if (partialStartOffset > N) { 1642 partialStartOffset = N; 1643 } else if (partialStartOffset < 0) { 1644 partialStartOffset = 0; 1645 } 1646 if (partialEndOffset > N) { 1647 partialEndOffset = N; 1648 } else if (partialEndOffset < 0) { 1649 partialEndOffset = 0; 1650 } 1651 } 1652 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1653 outText.text = content.subSequence(partialStartOffset, 1654 partialEndOffset); 1655 } else { 1656 outText.text = TextUtils.substring(content, partialStartOffset, 1657 partialEndOffset); 1658 } 1659 } else { 1660 outText.partialStartOffset = 0; 1661 outText.partialEndOffset = 0; 1662 outText.text = ""; 1663 } 1664 outText.flags = 0; 1665 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1666 outText.flags |= ExtractedText.FLAG_SELECTING; 1667 } 1668 if (mTextView.isSingleLine()) { 1669 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1670 } 1671 outText.startOffset = 0; 1672 outText.selectionStart = mTextView.getSelectionStart(); 1673 outText.selectionEnd = mTextView.getSelectionEnd(); 1674 outText.hint = mTextView.getHint(); 1675 return true; 1676 } 1677 1678 boolean reportExtractedText() { 1679 final Editor.InputMethodState ims = mInputMethodState; 1680 if (ims == null) { 1681 return false; 1682 } 1683 ims.mSelectionModeChanged = false; 1684 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1685 if (req == null) { 1686 return false; 1687 } 1688 final InputMethodManager imm = InputMethodManager.peekInstance(); 1689 if (imm == null) { 1690 return false; 1691 } 1692 if (TextView.DEBUG_EXTRACT) { 1693 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1694 + ims.mChangedStart 1695 + " end=" + ims.mChangedEnd 1696 + " delta=" + ims.mChangedDelta); 1697 } 1698 if (ims.mChangedStart < 0 && !ims.mContentChanged) { 1699 ims.mChangedStart = EXTRACT_NOTHING; 1700 } 1701 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1702 ims.mChangedDelta, ims.mExtractedText)) { 1703 if (TextView.DEBUG_EXTRACT) { 1704 Log.v(TextView.LOG_TAG, 1705 "Reporting extracted start=" 1706 + ims.mExtractedText.partialStartOffset 1707 + " end=" + ims.mExtractedText.partialEndOffset 1708 + ": " + ims.mExtractedText.text); 1709 } 1710 1711 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1712 ims.mChangedStart = EXTRACT_UNKNOWN; 1713 ims.mChangedEnd = EXTRACT_UNKNOWN; 1714 ims.mChangedDelta = 0; 1715 ims.mContentChanged = false; 1716 return true; 1717 } 1718 return false; 1719 } 1720 1721 private void sendUpdateSelection() { 1722 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1723 final InputMethodManager imm = InputMethodManager.peekInstance(); 1724 if (null != imm) { 1725 final int selectionStart = mTextView.getSelectionStart(); 1726 final int selectionEnd = mTextView.getSelectionEnd(); 1727 int candStart = -1; 1728 int candEnd = -1; 1729 if (mTextView.getText() instanceof Spannable) { 1730 final Spannable sp = (Spannable) mTextView.getText(); 1731 candStart = EditableInputConnection.getComposingSpanStart(sp); 1732 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1733 } 1734 // InputMethodManager#updateSelection skips sending the message if 1735 // none of the parameters have changed since the last time we called it. 1736 imm.updateSelection(mTextView, 1737 selectionStart, selectionEnd, candStart, candEnd); 1738 } 1739 } 1740 } 1741 1742 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1743 int cursorOffsetVertical) { 1744 final int selectionStart = mTextView.getSelectionStart(); 1745 final int selectionEnd = mTextView.getSelectionEnd(); 1746 1747 final InputMethodState ims = mInputMethodState; 1748 if (ims != null && ims.mBatchEditNesting == 0) { 1749 InputMethodManager imm = InputMethodManager.peekInstance(); 1750 if (imm != null) { 1751 if (imm.isActive(mTextView)) { 1752 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1753 // We are in extract mode and the content has changed 1754 // in some way... just report complete new text to the 1755 // input method. 1756 reportExtractedText(); 1757 } 1758 } 1759 } 1760 } 1761 1762 if (mCorrectionHighlighter != null) { 1763 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1764 } 1765 1766 if (highlight != null && selectionStart == selectionEnd && mDrawableForCursor != null) { 1767 drawCursor(canvas, cursorOffsetVertical); 1768 // Rely on the drawable entirely, do not draw the cursor line. 1769 // Has to be done after the IMM related code above which relies on the highlight. 1770 highlight = null; 1771 } 1772 1773 if (mSelectionActionModeHelper != null) { 1774 mSelectionActionModeHelper.onDraw(canvas); 1775 if (mSelectionActionModeHelper.isDrawingHighlight()) { 1776 highlight = null; 1777 } 1778 } 1779 1780 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1781 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1782 cursorOffsetVertical); 1783 } else { 1784 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1785 } 1786 } 1787 1788 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1789 Paint highlightPaint, int cursorOffsetVertical) { 1790 final long lineRange = layout.getLineRangeForDraw(canvas); 1791 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1792 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1793 if (lastLine < 0) return; 1794 1795 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1796 firstLine, lastLine); 1797 1798 if (layout instanceof DynamicLayout) { 1799 if (mTextRenderNodes == null) { 1800 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1801 } 1802 1803 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1804 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1805 int[] blockIndices = dynamicLayout.getBlockIndices(); 1806 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1807 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1808 1809 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1810 if (blockSet != null) { 1811 for (int i = 0; i < blockSet.size(); i++) { 1812 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1813 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1814 && mTextRenderNodes[blockIndex] != null) { 1815 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1816 } 1817 } 1818 } 1819 1820 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1821 if (startBlock < 0) { 1822 startBlock = -(startBlock + 1); 1823 } 1824 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1825 1826 int startIndexToFindAvailableRenderNode = 0; 1827 int lastIndex = numberOfBlocks; 1828 1829 for (int i = startBlock; i < numberOfBlocks; i++) { 1830 final int blockIndex = blockIndices[i]; 1831 if (i >= indexFirstChangedBlock 1832 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1833 && mTextRenderNodes[blockIndex] != null) { 1834 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1835 } 1836 if (blockEndLines[i] < firstLine) { 1837 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1838 // be redrawn after they get scrolled into drawing range. 1839 continue; 1840 } 1841 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1842 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1843 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1844 if (blockEndLines[i] >= lastLine) { 1845 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1846 break; 1847 } 1848 } 1849 if (blockSet != null) { 1850 for (int i = 0; i < blockSet.size(); i++) { 1851 final int block = blockSet.valueAt(i); 1852 final int blockIndex = dynamicLayout.getBlockIndex(block); 1853 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1854 || mTextRenderNodes[blockIndex] == null 1855 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1856 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1857 layout, highlight, highlightPaint, cursorOffsetVertical, 1858 blockEndLines, blockIndices, block, numberOfBlocks, 1859 startIndexToFindAvailableRenderNode); 1860 } 1861 } 1862 } 1863 1864 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1865 } else { 1866 // Boring layout is used for empty and hint text 1867 layout.drawText(canvas, firstLine, lastLine); 1868 } 1869 } 1870 1871 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1872 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1873 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1874 int startIndexToFindAvailableRenderNode) { 1875 final int blockEndLine = blockEndLines[blockInfoIndex]; 1876 int blockIndex = blockIndices[blockInfoIndex]; 1877 1878 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1879 if (blockIsInvalid) { 1880 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1881 startIndexToFindAvailableRenderNode); 1882 // Note how dynamic layout's internal block indices get updated from Editor 1883 blockIndices[blockInfoIndex] = blockIndex; 1884 if (mTextRenderNodes[blockIndex] != null) { 1885 mTextRenderNodes[blockIndex].isDirty = true; 1886 } 1887 startIndexToFindAvailableRenderNode = blockIndex + 1; 1888 } 1889 1890 if (mTextRenderNodes[blockIndex] == null) { 1891 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1892 } 1893 1894 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1895 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1896 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1897 final int blockBeginLine = blockInfoIndex == 0 ? 1898 0 : blockEndLines[blockInfoIndex - 1] + 1; 1899 final int top = layout.getLineTop(blockBeginLine); 1900 final int bottom = layout.getLineBottom(blockEndLine); 1901 int left = 0; 1902 int right = mTextView.getWidth(); 1903 if (mTextView.getHorizontallyScrolling()) { 1904 float min = Float.MAX_VALUE; 1905 float max = Float.MIN_VALUE; 1906 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1907 min = Math.min(min, layout.getLineLeft(line)); 1908 max = Math.max(max, layout.getLineRight(line)); 1909 } 1910 left = (int) min; 1911 right = (int) (max + 0.5f); 1912 } 1913 1914 // Rebuild display list if it is invalid 1915 if (blockDisplayListIsInvalid) { 1916 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1917 right - left, bottom - top); 1918 try { 1919 // drawText is always relative to TextView's origin, this translation 1920 // brings this range of text back to the top left corner of the viewport 1921 displayListCanvas.translate(-left, -top); 1922 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1923 mTextRenderNodes[blockIndex].isDirty = false; 1924 // No need to untranslate, previous context is popped after 1925 // drawDisplayList 1926 } finally { 1927 blockDisplayList.end(displayListCanvas); 1928 // Same as drawDisplayList below, handled by our TextView's parent 1929 blockDisplayList.setClipToBounds(false); 1930 } 1931 } 1932 1933 // Valid display list only needs to update its drawing location. 1934 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1935 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1936 } 1937 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1938 return startIndexToFindAvailableRenderNode; 1939 } 1940 1941 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1942 int searchStartIndex) { 1943 int length = mTextRenderNodes.length; 1944 for (int i = searchStartIndex; i < length; i++) { 1945 boolean blockIndexFound = false; 1946 for (int j = 0; j < numberOfBlocks; j++) { 1947 if (blockIndices[j] == i) { 1948 blockIndexFound = true; 1949 break; 1950 } 1951 } 1952 if (blockIndexFound) continue; 1953 return i; 1954 } 1955 1956 // No available index found, the pool has to grow 1957 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1958 return length; 1959 } 1960 1961 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1962 final boolean translate = cursorOffsetVertical != 0; 1963 if (translate) canvas.translate(0, cursorOffsetVertical); 1964 if (mDrawableForCursor != null) { 1965 mDrawableForCursor.draw(canvas); 1966 } 1967 if (translate) canvas.translate(0, -cursorOffsetVertical); 1968 } 1969 1970 void invalidateHandlesAndActionMode() { 1971 if (mSelectionModifierCursorController != null) { 1972 mSelectionModifierCursorController.invalidateHandles(); 1973 } 1974 if (mInsertionPointCursorController != null) { 1975 mInsertionPointCursorController.invalidateHandle(); 1976 } 1977 if (mTextActionMode != null) { 1978 invalidateActionMode(); 1979 } 1980 } 1981 1982 /** 1983 * Invalidates all the sub-display lists that overlap the specified character range 1984 */ 1985 void invalidateTextDisplayList(Layout layout, int start, int end) { 1986 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1987 final int firstLine = layout.getLineForOffset(start); 1988 final int lastLine = layout.getLineForOffset(end); 1989 1990 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1991 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1992 int[] blockIndices = dynamicLayout.getBlockIndices(); 1993 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1994 1995 int i = 0; 1996 // Skip the blocks before firstLine 1997 while (i < numberOfBlocks) { 1998 if (blockEndLines[i] >= firstLine) break; 1999 i++; 2000 } 2001 2002 // Invalidate all subsequent blocks until lastLine is passed 2003 while (i < numberOfBlocks) { 2004 final int blockIndex = blockIndices[i]; 2005 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 2006 mTextRenderNodes[blockIndex].isDirty = true; 2007 } 2008 if (blockEndLines[i] >= lastLine) break; 2009 i++; 2010 } 2011 } 2012 } 2013 2014 void invalidateTextDisplayList() { 2015 if (mTextRenderNodes != null) { 2016 for (int i = 0; i < mTextRenderNodes.length; i++) { 2017 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 2018 } 2019 } 2020 } 2021 2022 void updateCursorPosition() { 2023 if (mTextView.mCursorDrawableRes == 0) { 2024 mDrawableForCursor = null; 2025 return; 2026 } 2027 2028 final Layout layout = mTextView.getLayout(); 2029 final int offset = mTextView.getSelectionStart(); 2030 final int line = layout.getLineForOffset(offset); 2031 final int top = layout.getLineTop(line); 2032 final int bottom = layout.getLineBottomWithoutSpacing(line); 2033 2034 final boolean clamped = layout.shouldClampCursor(line); 2035 updateCursorPosition(top, bottom, layout.getPrimaryHorizontal(offset, clamped)); 2036 } 2037 2038 void refreshTextActionMode() { 2039 if (extractedTextModeWillBeStarted()) { 2040 mRestartActionModeOnNextRefresh = false; 2041 return; 2042 } 2043 final boolean hasSelection = mTextView.hasSelection(); 2044 final SelectionModifierCursorController selectionController = getSelectionController(); 2045 final InsertionPointCursorController insertionController = getInsertionController(); 2046 if ((selectionController != null && selectionController.isCursorBeingModified()) 2047 || (insertionController != null && insertionController.isCursorBeingModified())) { 2048 // ActionMode should be managed by the currently active cursor controller. 2049 mRestartActionModeOnNextRefresh = false; 2050 return; 2051 } 2052 if (hasSelection) { 2053 hideInsertionPointCursorController(); 2054 if (mTextActionMode == null) { 2055 if (mRestartActionModeOnNextRefresh) { 2056 // To avoid distraction, newly start action mode only when selection action 2057 // mode is being restarted. 2058 startSelectionActionModeAsync(false); 2059 } 2060 } else if (selectionController == null || !selectionController.isActive()) { 2061 // Insertion action mode is active. Avoid dismissing the selection. 2062 stopTextActionModeWithPreservingSelection(); 2063 startSelectionActionModeAsync(false); 2064 } else { 2065 mTextActionMode.invalidateContentRect(); 2066 } 2067 } else { 2068 // Insertion action mode is started only when insertion controller is explicitly 2069 // activated. 2070 if (insertionController == null || !insertionController.isActive()) { 2071 stopTextActionMode(); 2072 } else if (mTextActionMode != null) { 2073 mTextActionMode.invalidateContentRect(); 2074 } 2075 } 2076 mRestartActionModeOnNextRefresh = false; 2077 } 2078 2079 /** 2080 * Start an Insertion action mode. 2081 */ 2082 void startInsertionActionMode() { 2083 if (mInsertionActionModeRunnable != null) { 2084 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2085 } 2086 if (extractedTextModeWillBeStarted()) { 2087 return; 2088 } 2089 stopTextActionMode(); 2090 2091 ActionMode.Callback actionModeCallback = 2092 new TextActionModeCallback(TextActionMode.INSERTION); 2093 mTextActionMode = mTextView.startActionMode( 2094 actionModeCallback, ActionMode.TYPE_FLOATING); 2095 if (mTextActionMode != null && getInsertionController() != null) { 2096 getInsertionController().show(); 2097 } 2098 } 2099 2100 @NonNull 2101 TextView getTextView() { 2102 return mTextView; 2103 } 2104 2105 @Nullable 2106 ActionMode getTextActionMode() { 2107 return mTextActionMode; 2108 } 2109 2110 void setRestartActionModeOnNextRefresh(boolean value) { 2111 mRestartActionModeOnNextRefresh = value; 2112 } 2113 2114 /** 2115 * Asynchronously starts a selection action mode using the TextClassifier. 2116 */ 2117 void startSelectionActionModeAsync(boolean adjustSelection) { 2118 getSelectionActionModeHelper().startSelectionActionModeAsync(adjustSelection); 2119 } 2120 2121 void startLinkActionModeAsync(int start, int end) { 2122 if (!(mTextView.getText() instanceof Spannable)) { 2123 return; 2124 } 2125 stopTextActionMode(); 2126 getSelectionActionModeHelper().startLinkActionModeAsync(start, end); 2127 } 2128 2129 /** 2130 * Asynchronously invalidates an action mode using the TextClassifier. 2131 */ 2132 void invalidateActionModeAsync() { 2133 getSelectionActionModeHelper().invalidateActionModeAsync(); 2134 } 2135 2136 /** 2137 * Synchronously invalidates an action mode without the TextClassifier. 2138 */ 2139 private void invalidateActionMode() { 2140 if (mTextActionMode != null) { 2141 mTextActionMode.invalidate(); 2142 } 2143 } 2144 2145 private SelectionActionModeHelper getSelectionActionModeHelper() { 2146 if (mSelectionActionModeHelper == null) { 2147 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2148 } 2149 return mSelectionActionModeHelper; 2150 } 2151 2152 /** 2153 * If the TextView allows text selection, selects the current word when no existing selection 2154 * was available and starts a drag. 2155 * 2156 * @return true if the drag was started. 2157 */ 2158 private boolean selectCurrentWordAndStartDrag() { 2159 if (mInsertionActionModeRunnable != null) { 2160 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2161 } 2162 if (extractedTextModeWillBeStarted()) { 2163 return false; 2164 } 2165 if (!checkField()) { 2166 return false; 2167 } 2168 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2169 // No selection and cannot select a word. 2170 return false; 2171 } 2172 stopTextActionModeWithPreservingSelection(); 2173 getSelectionController().enterDrag( 2174 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2175 return true; 2176 } 2177 2178 /** 2179 * Checks whether a selection can be performed on the current TextView. 2180 * 2181 * @return true if a selection can be performed 2182 */ 2183 boolean checkField() { 2184 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2185 Log.w(TextView.LOG_TAG, 2186 "TextView does not support text selection. Selection cancelled."); 2187 return false; 2188 } 2189 return true; 2190 } 2191 2192 boolean startActionModeInternal(@TextActionMode int actionMode) { 2193 if (extractedTextModeWillBeStarted()) { 2194 return false; 2195 } 2196 if (mTextActionMode != null) { 2197 // Text action mode is already started 2198 invalidateActionMode(); 2199 return false; 2200 } 2201 2202 if (actionMode != TextActionMode.TEXT_LINK 2203 && (!checkField() || !mTextView.hasSelection())) { 2204 return false; 2205 } 2206 2207 ActionMode.Callback actionModeCallback = new TextActionModeCallback(actionMode); 2208 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2209 2210 final boolean selectionStarted = mTextActionMode != null; 2211 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2212 // Show the IME to be able to replace text, except when selecting non editable text. 2213 final InputMethodManager imm = InputMethodManager.peekInstance(); 2214 if (imm != null) { 2215 imm.showSoftInput(mTextView, 0, null); 2216 } 2217 } 2218 return selectionStarted; 2219 } 2220 2221 private boolean extractedTextModeWillBeStarted() { 2222 if (!(mTextView.isInExtractedMode())) { 2223 final InputMethodManager imm = InputMethodManager.peekInstance(); 2224 return imm != null && imm.isFullscreenMode(); 2225 } 2226 return false; 2227 } 2228 2229 /** 2230 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2231 * the current cursor position or selection range. This method is consistent with the 2232 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2233 */ 2234 private boolean shouldOfferToShowSuggestions() { 2235 CharSequence text = mTextView.getText(); 2236 if (!(text instanceof Spannable)) return false; 2237 2238 final Spannable spannable = (Spannable) text; 2239 final int selectionStart = mTextView.getSelectionStart(); 2240 final int selectionEnd = mTextView.getSelectionEnd(); 2241 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2242 SuggestionSpan.class); 2243 if (suggestionSpans.length == 0) { 2244 return false; 2245 } 2246 if (selectionStart == selectionEnd) { 2247 // Spans overlap the cursor. 2248 for (int i = 0; i < suggestionSpans.length; i++) { 2249 if (suggestionSpans[i].getSuggestions().length > 0) { 2250 return true; 2251 } 2252 } 2253 return false; 2254 } 2255 int minSpanStart = mTextView.getText().length(); 2256 int maxSpanEnd = 0; 2257 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2258 int unionOfSpansCoveringSelectionStartEnd = 0; 2259 boolean hasValidSuggestions = false; 2260 for (int i = 0; i < suggestionSpans.length; i++) { 2261 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2262 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2263 minSpanStart = Math.min(minSpanStart, spanStart); 2264 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2265 if (selectionStart < spanStart || selectionStart > spanEnd) { 2266 // The span doesn't cover the current selection start point. 2267 continue; 2268 } 2269 hasValidSuggestions = 2270 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2271 unionOfSpansCoveringSelectionStartStart = 2272 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2273 unionOfSpansCoveringSelectionStartEnd = 2274 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2275 } 2276 if (!hasValidSuggestions) { 2277 return false; 2278 } 2279 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2280 // No spans cover the selection start point. 2281 return false; 2282 } 2283 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2284 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2285 // There is a span that is not covered by the union. In this case, we soouldn't offer 2286 // to show suggestions as it's confusing. 2287 return false; 2288 } 2289 return true; 2290 } 2291 2292 /** 2293 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2294 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2295 */ 2296 private boolean isCursorInsideEasyCorrectionSpan() { 2297 Spannable spannable = (Spannable) mTextView.getText(); 2298 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2299 mTextView.getSelectionEnd(), SuggestionSpan.class); 2300 for (int i = 0; i < suggestionSpans.length; i++) { 2301 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2302 return true; 2303 } 2304 } 2305 return false; 2306 } 2307 2308 void onTouchUpEvent(MotionEvent event) { 2309 if (getSelectionActionModeHelper().resetSelection( 2310 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2311 return; 2312 } 2313 2314 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2315 hideCursorAndSpanControllers(); 2316 stopTextActionMode(); 2317 CharSequence text = mTextView.getText(); 2318 if (!selectAllGotFocus && text.length() > 0) { 2319 // Move cursor 2320 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2321 Selection.setSelection((Spannable) text, offset); 2322 if (mSpellChecker != null) { 2323 // When the cursor moves, the word that was typed may need spell check 2324 mSpellChecker.onSelectionChanged(); 2325 } 2326 2327 if (!extractedTextModeWillBeStarted()) { 2328 if (isCursorInsideEasyCorrectionSpan()) { 2329 // Cancel the single tap delayed runnable. 2330 if (mInsertionActionModeRunnable != null) { 2331 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2332 } 2333 2334 mShowSuggestionRunnable = new Runnable() { 2335 public void run() { 2336 replace(); 2337 } 2338 }; 2339 // removeCallbacks is performed on every touch 2340 mTextView.postDelayed(mShowSuggestionRunnable, 2341 ViewConfiguration.getDoubleTapTimeout()); 2342 } else if (hasInsertionController()) { 2343 getInsertionController().show(); 2344 } 2345 } 2346 } 2347 } 2348 2349 protected void stopTextActionMode() { 2350 if (mTextActionMode != null) { 2351 // This will hide the mSelectionModifierCursorController 2352 mTextActionMode.finish(); 2353 } 2354 } 2355 2356 private void stopTextActionModeWithPreservingSelection() { 2357 if (mTextActionMode != null) { 2358 mRestartActionModeOnNextRefresh = true; 2359 } 2360 mPreserveSelection = true; 2361 stopTextActionMode(); 2362 mPreserveSelection = false; 2363 } 2364 2365 /** 2366 * @return True if this view supports insertion handles. 2367 */ 2368 boolean hasInsertionController() { 2369 return mInsertionControllerEnabled; 2370 } 2371 2372 /** 2373 * @return True if this view supports selection handles. 2374 */ 2375 boolean hasSelectionController() { 2376 return mSelectionControllerEnabled; 2377 } 2378 2379 private InsertionPointCursorController getInsertionController() { 2380 if (!mInsertionControllerEnabled) { 2381 return null; 2382 } 2383 2384 if (mInsertionPointCursorController == null) { 2385 mInsertionPointCursorController = new InsertionPointCursorController(); 2386 2387 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2388 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2389 } 2390 2391 return mInsertionPointCursorController; 2392 } 2393 2394 @Nullable 2395 SelectionModifierCursorController getSelectionController() { 2396 if (!mSelectionControllerEnabled) { 2397 return null; 2398 } 2399 2400 if (mSelectionModifierCursorController == null) { 2401 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2402 2403 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2404 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2405 } 2406 2407 return mSelectionModifierCursorController; 2408 } 2409 2410 @VisibleForTesting 2411 @Nullable 2412 public Drawable getCursorDrawable() { 2413 return mDrawableForCursor; 2414 } 2415 2416 private void updateCursorPosition(int top, int bottom, float horizontal) { 2417 if (mDrawableForCursor == null) { 2418 mDrawableForCursor = mTextView.getContext().getDrawable( 2419 mTextView.mCursorDrawableRes); 2420 } 2421 final int left = clampHorizontalPosition(mDrawableForCursor, horizontal); 2422 final int width = mDrawableForCursor.getIntrinsicWidth(); 2423 mDrawableForCursor.setBounds(left, top - mTempRect.top, left + width, 2424 bottom + mTempRect.bottom); 2425 } 2426 2427 /** 2428 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2429 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2430 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2431 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2432 * of the view. 2433 * 2434 * @param drawable Drawable. Can be null. 2435 * @param horizontal Horizontal position for the drawable. 2436 * @return The clamped horizontal position for the drawable. 2437 */ 2438 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2439 horizontal = Math.max(0.5f, horizontal - 0.5f); 2440 if (mTempRect == null) mTempRect = new Rect(); 2441 2442 int drawableWidth = 0; 2443 if (drawable != null) { 2444 drawable.getPadding(mTempRect); 2445 drawableWidth = drawable.getIntrinsicWidth(); 2446 } else { 2447 mTempRect.setEmpty(); 2448 } 2449 2450 int scrollX = mTextView.getScrollX(); 2451 float horizontalDiff = horizontal - scrollX; 2452 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2453 - mTextView.getCompoundPaddingRight(); 2454 2455 final int left; 2456 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2457 // at the rightmost position 2458 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2459 } else if (Math.abs(horizontalDiff) <= 1f 2460 || (TextUtils.isEmpty(mTextView.getText()) 2461 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2462 && horizontal <= 1f)) { 2463 // at the leftmost position 2464 left = scrollX - mTempRect.left; 2465 } else { 2466 left = (int) horizontal - mTempRect.left; 2467 } 2468 return left; 2469 } 2470 2471 /** 2472 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2473 * a dictionary) from the current input method, provided by it calling 2474 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2475 * implementation flashes the background of the corrected word to provide feedback to the user. 2476 * 2477 * @param info The auto correct info about the text that was corrected. 2478 */ 2479 public void onCommitCorrection(CorrectionInfo info) { 2480 if (mCorrectionHighlighter == null) { 2481 mCorrectionHighlighter = new CorrectionHighlighter(); 2482 } else { 2483 mCorrectionHighlighter.invalidate(false); 2484 } 2485 2486 mCorrectionHighlighter.highlight(info); 2487 mUndoInputFilter.freezeLastEdit(); 2488 } 2489 2490 void onScrollChanged() { 2491 if (mPositionListener != null) { 2492 mPositionListener.onScrollChanged(); 2493 } 2494 if (mTextActionMode != null) { 2495 mTextActionMode.invalidateContentRect(); 2496 } 2497 } 2498 2499 /** 2500 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2501 */ 2502 private boolean shouldBlink() { 2503 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2504 2505 final int start = mTextView.getSelectionStart(); 2506 if (start < 0) return false; 2507 2508 final int end = mTextView.getSelectionEnd(); 2509 if (end < 0) return false; 2510 2511 return start == end; 2512 } 2513 2514 void makeBlink() { 2515 if (shouldBlink()) { 2516 mShowCursor = SystemClock.uptimeMillis(); 2517 if (mBlink == null) mBlink = new Blink(); 2518 mTextView.removeCallbacks(mBlink); 2519 mTextView.postDelayed(mBlink, BLINK); 2520 } else { 2521 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2522 } 2523 } 2524 2525 private class Blink implements Runnable { 2526 private boolean mCancelled; 2527 2528 public void run() { 2529 if (mCancelled) { 2530 return; 2531 } 2532 2533 mTextView.removeCallbacks(this); 2534 2535 if (shouldBlink()) { 2536 if (mTextView.getLayout() != null) { 2537 mTextView.invalidateCursorPath(); 2538 } 2539 2540 mTextView.postDelayed(this, BLINK); 2541 } 2542 } 2543 2544 void cancel() { 2545 if (!mCancelled) { 2546 mTextView.removeCallbacks(this); 2547 mCancelled = true; 2548 } 2549 } 2550 2551 void uncancel() { 2552 mCancelled = false; 2553 } 2554 } 2555 2556 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2557 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2558 com.android.internal.R.layout.text_drag_thumbnail, null); 2559 2560 if (shadowView == null) { 2561 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2562 } 2563 2564 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2565 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2566 end = TextUtils.unpackRangeEndFromLong(range); 2567 } 2568 final CharSequence text = mTextView.getTransformedText(start, end); 2569 shadowView.setText(text); 2570 shadowView.setTextColor(mTextView.getTextColors()); 2571 2572 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2573 shadowView.setGravity(Gravity.CENTER); 2574 2575 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2576 ViewGroup.LayoutParams.WRAP_CONTENT)); 2577 2578 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2579 shadowView.measure(size, size); 2580 2581 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2582 shadowView.invalidate(); 2583 return new DragShadowBuilder(shadowView); 2584 } 2585 2586 private static class DragLocalState { 2587 public TextView sourceTextView; 2588 public int start, end; 2589 2590 public DragLocalState(TextView sourceTextView, int start, int end) { 2591 this.sourceTextView = sourceTextView; 2592 this.start = start; 2593 this.end = end; 2594 } 2595 } 2596 2597 void onDrop(DragEvent event) { 2598 SpannableStringBuilder content = new SpannableStringBuilder(); 2599 2600 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2601 if (permissions != null) { 2602 permissions.takeTransient(); 2603 } 2604 2605 try { 2606 ClipData clipData = event.getClipData(); 2607 final int itemCount = clipData.getItemCount(); 2608 for (int i = 0; i < itemCount; i++) { 2609 Item item = clipData.getItemAt(i); 2610 content.append(item.coerceToStyledText(mTextView.getContext())); 2611 } 2612 } finally { 2613 if (permissions != null) { 2614 permissions.release(); 2615 } 2616 } 2617 2618 mTextView.beginBatchEdit(); 2619 mUndoInputFilter.freezeLastEdit(); 2620 try { 2621 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2622 Object localState = event.getLocalState(); 2623 DragLocalState dragLocalState = null; 2624 if (localState instanceof DragLocalState) { 2625 dragLocalState = (DragLocalState) localState; 2626 } 2627 boolean dragDropIntoItself = dragLocalState != null 2628 && dragLocalState.sourceTextView == mTextView; 2629 2630 if (dragDropIntoItself) { 2631 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2632 // A drop inside the original selection discards the drop. 2633 return; 2634 } 2635 } 2636 2637 final int originalLength = mTextView.getText().length(); 2638 int min = offset; 2639 int max = offset; 2640 2641 Selection.setSelection((Spannable) mTextView.getText(), max); 2642 mTextView.replaceText_internal(min, max, content); 2643 2644 if (dragDropIntoItself) { 2645 int dragSourceStart = dragLocalState.start; 2646 int dragSourceEnd = dragLocalState.end; 2647 if (max <= dragSourceStart) { 2648 // Inserting text before selection has shifted positions 2649 final int shift = mTextView.getText().length() - originalLength; 2650 dragSourceStart += shift; 2651 dragSourceEnd += shift; 2652 } 2653 2654 // Delete original selection 2655 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2656 2657 // Make sure we do not leave two adjacent spaces. 2658 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2659 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2660 if (nextCharIdx > prevCharIdx + 1) { 2661 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2662 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2663 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2664 } 2665 } 2666 } 2667 } finally { 2668 mTextView.endBatchEdit(); 2669 mUndoInputFilter.freezeLastEdit(); 2670 } 2671 } 2672 2673 public void addSpanWatchers(Spannable text) { 2674 final int textLength = text.length(); 2675 2676 if (mKeyListener != null) { 2677 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2678 } 2679 2680 if (mSpanController == null) { 2681 mSpanController = new SpanController(); 2682 } 2683 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2684 } 2685 2686 void setContextMenuAnchor(float x, float y) { 2687 mContextMenuAnchorX = x; 2688 mContextMenuAnchorY = y; 2689 } 2690 2691 void onCreateContextMenu(ContextMenu menu) { 2692 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2693 || Float.isNaN(mContextMenuAnchorY)) { 2694 return; 2695 } 2696 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2697 if (offset == -1) { 2698 return; 2699 } 2700 2701 stopTextActionModeWithPreservingSelection(); 2702 if (mTextView.canSelectText()) { 2703 final boolean isOnSelection = mTextView.hasSelection() 2704 && offset >= mTextView.getSelectionStart() 2705 && offset <= mTextView.getSelectionEnd(); 2706 if (!isOnSelection) { 2707 // Right clicked position is not on the selection. Remove the selection and move the 2708 // cursor to the right clicked position. 2709 Selection.setSelection((Spannable) mTextView.getText(), offset); 2710 stopTextActionMode(); 2711 } 2712 } 2713 2714 if (shouldOfferToShowSuggestions()) { 2715 final SuggestionInfo[] suggestionInfoArray = 2716 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2717 for (int i = 0; i < suggestionInfoArray.length; i++) { 2718 suggestionInfoArray[i] = new SuggestionInfo(); 2719 } 2720 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2721 com.android.internal.R.string.replace); 2722 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2723 for (int i = 0; i < numItems; i++) { 2724 final SuggestionInfo info = suggestionInfoArray[i]; 2725 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2726 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2727 @Override 2728 public boolean onMenuItemClick(MenuItem item) { 2729 replaceWithSuggestion(info); 2730 return true; 2731 } 2732 }); 2733 } 2734 } 2735 2736 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2737 com.android.internal.R.string.undo) 2738 .setAlphabeticShortcut('z') 2739 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2740 .setEnabled(mTextView.canUndo()); 2741 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2742 com.android.internal.R.string.redo) 2743 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2744 .setEnabled(mTextView.canRedo()); 2745 2746 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2747 com.android.internal.R.string.cut) 2748 .setAlphabeticShortcut('x') 2749 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2750 .setEnabled(mTextView.canCut()); 2751 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2752 com.android.internal.R.string.copy) 2753 .setAlphabeticShortcut('c') 2754 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2755 .setEnabled(mTextView.canCopy()); 2756 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2757 com.android.internal.R.string.paste) 2758 .setAlphabeticShortcut('v') 2759 .setEnabled(mTextView.canPaste()) 2760 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2761 menu.add(Menu.NONE, TextView.ID_PASTE_AS_PLAIN_TEXT, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2762 com.android.internal.R.string.paste_as_plain_text) 2763 .setEnabled(mTextView.canPasteAsPlainText()) 2764 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2765 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2766 com.android.internal.R.string.share) 2767 .setEnabled(mTextView.canShare()) 2768 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2769 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2770 com.android.internal.R.string.selectAll) 2771 .setAlphabeticShortcut('a') 2772 .setEnabled(mTextView.canSelectAllText()) 2773 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2774 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2775 android.R.string.autofill) 2776 .setEnabled(mTextView.canRequestAutofill()) 2777 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2778 2779 mPreserveSelection = true; 2780 } 2781 2782 @Nullable 2783 private SuggestionSpan findEquivalentSuggestionSpan( 2784 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2785 final Editable editable = (Editable) mTextView.getText(); 2786 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2787 // Exactly same span is found. 2788 return suggestionSpanInfo.mSuggestionSpan; 2789 } 2790 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2791 // contents. 2792 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2793 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2794 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2795 final int start = editable.getSpanStart(suggestionSpan); 2796 if (start != suggestionSpanInfo.mSpanStart) { 2797 continue; 2798 } 2799 final int end = editable.getSpanEnd(suggestionSpan); 2800 if (end != suggestionSpanInfo.mSpanEnd) { 2801 continue; 2802 } 2803 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2804 return suggestionSpan; 2805 } 2806 } 2807 return null; 2808 } 2809 2810 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2811 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2812 suggestionInfo.mSuggestionSpanInfo); 2813 if (targetSuggestionSpan == null) { 2814 // Span has been removed 2815 return; 2816 } 2817 final Editable editable = (Editable) mTextView.getText(); 2818 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2819 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2820 if (spanStart < 0 || spanEnd <= spanStart) { 2821 // Span has been removed 2822 return; 2823 } 2824 2825 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2826 // SuggestionSpans are removed by replace: save them before 2827 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2828 SuggestionSpan.class); 2829 final int length = suggestionSpans.length; 2830 int[] suggestionSpansStarts = new int[length]; 2831 int[] suggestionSpansEnds = new int[length]; 2832 int[] suggestionSpansFlags = new int[length]; 2833 for (int i = 0; i < length; i++) { 2834 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2835 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2836 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2837 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2838 2839 // Remove potential misspelled flags 2840 int suggestionSpanFlags = suggestionSpan.getFlags(); 2841 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2842 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2843 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2844 suggestionSpan.setFlags(suggestionSpanFlags); 2845 } 2846 } 2847 2848 // Notify source IME of the suggestion pick. Do this before swapping texts. 2849 targetSuggestionSpan.notifySelection( 2850 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2851 2852 // Swap text content between actual text and Suggestion span 2853 final int suggestionStart = suggestionInfo.mSuggestionStart; 2854 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2855 final String suggestion = suggestionInfo.mText.subSequence( 2856 suggestionStart, suggestionEnd).toString(); 2857 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2858 2859 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2860 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2861 2862 // Restore previous SuggestionSpans 2863 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2864 for (int i = 0; i < length; i++) { 2865 // Only spans that include the modified region make sense after replacement 2866 // Spans partially included in the replaced region are removed, there is no 2867 // way to assign them a valid range after replacement 2868 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2869 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2870 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2871 } 2872 } 2873 // Move cursor at the end of the replaced word 2874 final int newCursorPosition = spanEnd + lengthDelta; 2875 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2876 } 2877 2878 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2879 new MenuItem.OnMenuItemClickListener() { 2880 @Override 2881 public boolean onMenuItemClick(MenuItem item) { 2882 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2883 return true; 2884 } 2885 return mTextView.onTextContextMenuItem(item.getItemId()); 2886 } 2887 }; 2888 2889 /** 2890 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2891 * pop-up should be displayed. 2892 * Also monitors {@link Selection} to call back to the attached input method. 2893 */ 2894 private class SpanController implements SpanWatcher { 2895 2896 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2897 2898 private EasyEditPopupWindow mPopupWindow; 2899 2900 private Runnable mHidePopup; 2901 2902 // This function is pure but inner classes can't have static functions 2903 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2904 final Object span) { 2905 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2906 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2907 } 2908 2909 @Override 2910 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2911 if (isNonIntermediateSelectionSpan(text, span)) { 2912 sendUpdateSelection(); 2913 } else if (span instanceof EasyEditSpan) { 2914 if (mPopupWindow == null) { 2915 mPopupWindow = new EasyEditPopupWindow(); 2916 mHidePopup = new Runnable() { 2917 @Override 2918 public void run() { 2919 hide(); 2920 } 2921 }; 2922 } 2923 2924 // Make sure there is only at most one EasyEditSpan in the text 2925 if (mPopupWindow.mEasyEditSpan != null) { 2926 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2927 } 2928 2929 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2930 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2931 @Override 2932 public void onDeleteClick(EasyEditSpan span) { 2933 Editable editable = (Editable) mTextView.getText(); 2934 int start = editable.getSpanStart(span); 2935 int end = editable.getSpanEnd(span); 2936 if (start >= 0 && end >= 0) { 2937 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2938 mTextView.deleteText_internal(start, end); 2939 } 2940 editable.removeSpan(span); 2941 } 2942 }); 2943 2944 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2945 // The window is not visible yet, ignore the text change. 2946 return; 2947 } 2948 2949 if (mTextView.getLayout() == null) { 2950 // The view has not been laid out yet, ignore the text change 2951 return; 2952 } 2953 2954 if (extractedTextModeWillBeStarted()) { 2955 // The input is in extract mode. Do not handle the easy edit in 2956 // the original TextView, as the ExtractEditText will do 2957 return; 2958 } 2959 2960 mPopupWindow.show(); 2961 mTextView.removeCallbacks(mHidePopup); 2962 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2963 } 2964 } 2965 2966 @Override 2967 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2968 if (isNonIntermediateSelectionSpan(text, span)) { 2969 sendUpdateSelection(); 2970 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2971 hide(); 2972 } 2973 } 2974 2975 @Override 2976 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2977 int newStart, int newEnd) { 2978 if (isNonIntermediateSelectionSpan(text, span)) { 2979 sendUpdateSelection(); 2980 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2981 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2982 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2983 text.removeSpan(easyEditSpan); 2984 } 2985 } 2986 2987 public void hide() { 2988 if (mPopupWindow != null) { 2989 mPopupWindow.hide(); 2990 mTextView.removeCallbacks(mHidePopup); 2991 } 2992 } 2993 2994 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2995 try { 2996 PendingIntent pendingIntent = span.getPendingIntent(); 2997 if (pendingIntent != null) { 2998 Intent intent = new Intent(); 2999 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 3000 pendingIntent.send(mTextView.getContext(), 0, intent); 3001 } 3002 } catch (CanceledException e) { 3003 // This should not happen, as we should try to send the intent only once. 3004 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 3005 } 3006 } 3007 } 3008 3009 /** 3010 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 3011 */ 3012 private interface EasyEditDeleteListener { 3013 3014 /** 3015 * Clicks the delete pop-up. 3016 */ 3017 void onDeleteClick(EasyEditSpan span); 3018 } 3019 3020 /** 3021 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 3022 * by {@link SpanController}. 3023 */ 3024 private class EasyEditPopupWindow extends PinnedPopupWindow 3025 implements OnClickListener { 3026 private static final int POPUP_TEXT_LAYOUT = 3027 com.android.internal.R.layout.text_edit_action_popup_text; 3028 private TextView mDeleteTextView; 3029 private EasyEditSpan mEasyEditSpan; 3030 private EasyEditDeleteListener mOnDeleteListener; 3031 3032 @Override 3033 protected void createPopupWindow() { 3034 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 3035 com.android.internal.R.attr.textSelectHandleWindowStyle); 3036 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3037 mPopupWindow.setClippingEnabled(true); 3038 } 3039 3040 @Override 3041 protected void initContentView() { 3042 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 3043 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 3044 mContentView = linearLayout; 3045 mContentView.setBackgroundResource( 3046 com.android.internal.R.drawable.text_edit_side_paste_window); 3047 3048 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 3049 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 3050 3051 LayoutParams wrapContent = new LayoutParams( 3052 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 3053 3054 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 3055 mDeleteTextView.setLayoutParams(wrapContent); 3056 mDeleteTextView.setText(com.android.internal.R.string.delete); 3057 mDeleteTextView.setOnClickListener(this); 3058 mContentView.addView(mDeleteTextView); 3059 } 3060 3061 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 3062 mEasyEditSpan = easyEditSpan; 3063 } 3064 3065 private void setOnDeleteListener(EasyEditDeleteListener listener) { 3066 mOnDeleteListener = listener; 3067 } 3068 3069 @Override 3070 public void onClick(View view) { 3071 if (view == mDeleteTextView 3072 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 3073 && mOnDeleteListener != null) { 3074 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 3075 } 3076 } 3077 3078 @Override 3079 public void hide() { 3080 if (mEasyEditSpan != null) { 3081 mEasyEditSpan.setDeleteEnabled(false); 3082 } 3083 mOnDeleteListener = null; 3084 super.hide(); 3085 } 3086 3087 @Override 3088 protected int getTextOffset() { 3089 // Place the pop-up at the end of the span 3090 Editable editable = (Editable) mTextView.getText(); 3091 return editable.getSpanEnd(mEasyEditSpan); 3092 } 3093 3094 @Override 3095 protected int getVerticalLocalPosition(int line) { 3096 final Layout layout = mTextView.getLayout(); 3097 return layout.getLineBottomWithoutSpacing(line); 3098 } 3099 3100 @Override 3101 protected int clipVertically(int positionY) { 3102 // As we display the pop-up below the span, no vertical clipping is required. 3103 return positionY; 3104 } 3105 } 3106 3107 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 3108 // 3 handles 3109 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 3110 // 1 CursorAnchorInfoNotifier 3111 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 3112 private TextViewPositionListener[] mPositionListeners = 3113 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 3114 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 3115 private boolean mPositionHasChanged = true; 3116 // Absolute position of the TextView with respect to its parent window 3117 private int mPositionX, mPositionY; 3118 private int mPositionXOnScreen, mPositionYOnScreen; 3119 private int mNumberOfListeners; 3120 private boolean mScrollHasChanged; 3121 final int[] mTempCoords = new int[2]; 3122 3123 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 3124 if (mNumberOfListeners == 0) { 3125 updatePosition(); 3126 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3127 vto.addOnPreDrawListener(this); 3128 } 3129 3130 int emptySlotIndex = -1; 3131 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3132 TextViewPositionListener listener = mPositionListeners[i]; 3133 if (listener == positionListener) { 3134 return; 3135 } else if (emptySlotIndex < 0 && listener == null) { 3136 emptySlotIndex = i; 3137 } 3138 } 3139 3140 mPositionListeners[emptySlotIndex] = positionListener; 3141 mCanMove[emptySlotIndex] = canMove; 3142 mNumberOfListeners++; 3143 } 3144 3145 public void removeSubscriber(TextViewPositionListener positionListener) { 3146 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3147 if (mPositionListeners[i] == positionListener) { 3148 mPositionListeners[i] = null; 3149 mNumberOfListeners--; 3150 break; 3151 } 3152 } 3153 3154 if (mNumberOfListeners == 0) { 3155 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3156 vto.removeOnPreDrawListener(this); 3157 } 3158 } 3159 3160 public int getPositionX() { 3161 return mPositionX; 3162 } 3163 3164 public int getPositionY() { 3165 return mPositionY; 3166 } 3167 3168 public int getPositionXOnScreen() { 3169 return mPositionXOnScreen; 3170 } 3171 3172 public int getPositionYOnScreen() { 3173 return mPositionYOnScreen; 3174 } 3175 3176 @Override 3177 public boolean onPreDraw() { 3178 updatePosition(); 3179 3180 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3181 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3182 TextViewPositionListener positionListener = mPositionListeners[i]; 3183 if (positionListener != null) { 3184 positionListener.updatePosition(mPositionX, mPositionY, 3185 mPositionHasChanged, mScrollHasChanged); 3186 } 3187 } 3188 } 3189 3190 mScrollHasChanged = false; 3191 return true; 3192 } 3193 3194 private void updatePosition() { 3195 mTextView.getLocationInWindow(mTempCoords); 3196 3197 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3198 3199 mPositionX = mTempCoords[0]; 3200 mPositionY = mTempCoords[1]; 3201 3202 mTextView.getLocationOnScreen(mTempCoords); 3203 3204 mPositionXOnScreen = mTempCoords[0]; 3205 mPositionYOnScreen = mTempCoords[1]; 3206 } 3207 3208 public void onScrollChanged() { 3209 mScrollHasChanged = true; 3210 } 3211 } 3212 3213 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3214 protected PopupWindow mPopupWindow; 3215 protected ViewGroup mContentView; 3216 int mPositionX, mPositionY; 3217 int mClippingLimitLeft, mClippingLimitRight; 3218 3219 protected abstract void createPopupWindow(); 3220 protected abstract void initContentView(); 3221 protected abstract int getTextOffset(); 3222 protected abstract int getVerticalLocalPosition(int line); 3223 protected abstract int clipVertically(int positionY); 3224 protected void setUp() { 3225 } 3226 3227 public PinnedPopupWindow() { 3228 // Due to calling subclass methods in base constructor, subclass constructor is not 3229 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3230 // a chance to initialize subclasses, call setUp() method here. 3231 // TODO: It is good to extract non trivial initialization code from constructor. 3232 setUp(); 3233 3234 createPopupWindow(); 3235 3236 mPopupWindow.setWindowLayoutType( 3237 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3238 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3239 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3240 3241 initContentView(); 3242 3243 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3244 ViewGroup.LayoutParams.WRAP_CONTENT); 3245 mContentView.setLayoutParams(wrapContent); 3246 3247 mPopupWindow.setContentView(mContentView); 3248 } 3249 3250 public void show() { 3251 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3252 3253 computeLocalPosition(); 3254 3255 final PositionListener positionListener = getPositionListener(); 3256 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3257 } 3258 3259 protected void measureContent() { 3260 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3261 mContentView.measure( 3262 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3263 View.MeasureSpec.AT_MOST), 3264 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3265 View.MeasureSpec.AT_MOST)); 3266 } 3267 3268 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3269 * positioned according to viewportToContentHorizontalOffset. 3270 * 3271 * This method assumes that mContentView has properly been measured from its content. */ 3272 private void computeLocalPosition() { 3273 measureContent(); 3274 final int width = mContentView.getMeasuredWidth(); 3275 final int offset = getTextOffset(); 3276 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3277 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3278 3279 final int line = mTextView.getLayout().getLineForOffset(offset); 3280 mPositionY = getVerticalLocalPosition(line); 3281 mPositionY += mTextView.viewportToContentVerticalOffset(); 3282 } 3283 3284 private void updatePosition(int parentPositionX, int parentPositionY) { 3285 int positionX = parentPositionX + mPositionX; 3286 int positionY = parentPositionY + mPositionY; 3287 3288 positionY = clipVertically(positionY); 3289 3290 // Horizontal clipping 3291 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3292 final int width = mContentView.getMeasuredWidth(); 3293 positionX = Math.min( 3294 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3295 positionX = Math.max(-mClippingLimitLeft, positionX); 3296 3297 if (isShowing()) { 3298 mPopupWindow.update(positionX, positionY, -1, -1); 3299 } else { 3300 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3301 positionX, positionY); 3302 } 3303 } 3304 3305 public void hide() { 3306 if (!isShowing()) { 3307 return; 3308 } 3309 mPopupWindow.dismiss(); 3310 getPositionListener().removeSubscriber(this); 3311 } 3312 3313 @Override 3314 public void updatePosition(int parentPositionX, int parentPositionY, 3315 boolean parentPositionChanged, boolean parentScrolled) { 3316 // Either parentPositionChanged or parentScrolled is true, check if still visible 3317 if (isShowing() && isOffsetVisible(getTextOffset())) { 3318 if (parentScrolled) computeLocalPosition(); 3319 updatePosition(parentPositionX, parentPositionY); 3320 } else { 3321 hide(); 3322 } 3323 } 3324 3325 public boolean isShowing() { 3326 return mPopupWindow.isShowing(); 3327 } 3328 } 3329 3330 private static final class SuggestionInfo { 3331 // Range of actual suggestion within mText 3332 int mSuggestionStart, mSuggestionEnd; 3333 3334 // The SuggestionSpan that this TextView represents 3335 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3336 3337 // The index of this suggestion inside suggestionSpan 3338 int mSuggestionIndex; 3339 3340 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3341 3342 void clear() { 3343 mSuggestionSpanInfo.clear(); 3344 mText.clear(); 3345 } 3346 3347 // Utility method to set attributes about a SuggestionSpan. 3348 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3349 mSuggestionSpanInfo.mSuggestionSpan = span; 3350 mSuggestionSpanInfo.mSpanStart = spanStart; 3351 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3352 } 3353 } 3354 3355 private static final class SuggestionSpanInfo { 3356 // The SuggestionSpan; 3357 @Nullable 3358 SuggestionSpan mSuggestionSpan; 3359 3360 // The SuggestionSpan start position 3361 int mSpanStart; 3362 3363 // The SuggestionSpan end position 3364 int mSpanEnd; 3365 3366 void clear() { 3367 mSuggestionSpan = null; 3368 } 3369 } 3370 3371 private class SuggestionHelper { 3372 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3373 new SuggestionSpanComparator(); 3374 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3375 new HashMap<SuggestionSpan, Integer>(); 3376 3377 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3378 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3379 final int flag1 = span1.getFlags(); 3380 final int flag2 = span2.getFlags(); 3381 if (flag1 != flag2) { 3382 // The order here should match what is used in updateDrawState 3383 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3384 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3385 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3386 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3387 if (easy1 && !misspelled1) return -1; 3388 if (easy2 && !misspelled2) return 1; 3389 if (misspelled1) return -1; 3390 if (misspelled2) return 1; 3391 } 3392 3393 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3394 } 3395 } 3396 3397 /** 3398 * Returns the suggestion spans that cover the current cursor position. The suggestion 3399 * spans are sorted according to the length of text that they are attached to. 3400 */ 3401 private SuggestionSpan[] getSortedSuggestionSpans() { 3402 int pos = mTextView.getSelectionStart(); 3403 Spannable spannable = (Spannable) mTextView.getText(); 3404 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3405 3406 mSpansLengths.clear(); 3407 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3408 int start = spannable.getSpanStart(suggestionSpan); 3409 int end = spannable.getSpanEnd(suggestionSpan); 3410 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3411 } 3412 3413 // The suggestions are sorted according to their types (easy correction first, then 3414 // misspelled) and to the length of the text that they cover (shorter first). 3415 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3416 mSpansLengths.clear(); 3417 3418 return suggestionSpans; 3419 } 3420 3421 /** 3422 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3423 * position. 3424 * 3425 * @param suggestionInfos SuggestionInfo array the results will be set. 3426 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3427 * @return the number of suggestions actually fetched. 3428 */ 3429 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3430 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3431 final Spannable spannable = (Spannable) mTextView.getText(); 3432 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3433 final int nbSpans = suggestionSpans.length; 3434 if (nbSpans == 0) return 0; 3435 3436 int numberOfSuggestions = 0; 3437 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3438 final int spanStart = spannable.getSpanStart(suggestionSpan); 3439 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3440 3441 if (misspelledSpanInfo != null 3442 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3443 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3444 misspelledSpanInfo.mSpanStart = spanStart; 3445 misspelledSpanInfo.mSpanEnd = spanEnd; 3446 } 3447 3448 final String[] suggestions = suggestionSpan.getSuggestions(); 3449 final int nbSuggestions = suggestions.length; 3450 suggestionLoop: 3451 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3452 final String suggestion = suggestions[suggestionIndex]; 3453 for (int i = 0; i < numberOfSuggestions; i++) { 3454 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3455 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3456 final int otherSpanStart = 3457 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3458 final int otherSpanEnd = 3459 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3460 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3461 continue suggestionLoop; 3462 } 3463 } 3464 } 3465 3466 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3467 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3468 suggestionInfo.mSuggestionIndex = suggestionIndex; 3469 suggestionInfo.mSuggestionStart = 0; 3470 suggestionInfo.mSuggestionEnd = suggestion.length(); 3471 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3472 numberOfSuggestions++; 3473 if (numberOfSuggestions >= suggestionInfos.length) { 3474 return numberOfSuggestions; 3475 } 3476 } 3477 } 3478 return numberOfSuggestions; 3479 } 3480 } 3481 3482 @VisibleForTesting 3483 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3484 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3485 3486 // Key of intent extras for inserting new word into user dictionary. 3487 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3488 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3489 3490 private SuggestionInfo[] mSuggestionInfos; 3491 private int mNumberOfSuggestions; 3492 private boolean mCursorWasVisibleBeforeSuggestions; 3493 private boolean mIsShowingUp = false; 3494 private SuggestionAdapter mSuggestionsAdapter; 3495 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3496 private TextView mAddToDictionaryButton; 3497 private TextView mDeleteButton; 3498 private ListView mSuggestionListView; 3499 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3500 private int mContainerMarginWidth; 3501 private int mContainerMarginTop; 3502 private LinearLayout mContainerView; 3503 private Context mContext; // TODO: Make mContext final. 3504 3505 private class CustomPopupWindow extends PopupWindow { 3506 3507 @Override 3508 public void dismiss() { 3509 if (!isShowing()) { 3510 return; 3511 } 3512 super.dismiss(); 3513 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3514 3515 // Safe cast since show() checks that mTextView.getText() is an Editable 3516 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3517 3518 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3519 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3520 getInsertionController().show(); 3521 } 3522 } 3523 } 3524 3525 public SuggestionsPopupWindow() { 3526 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3527 } 3528 3529 @Override 3530 protected void setUp() { 3531 mContext = applyDefaultTheme(mTextView.getContext()); 3532 mHighlightSpan = new TextAppearanceSpan(mContext, 3533 mTextView.mTextEditSuggestionHighlightStyle); 3534 } 3535 3536 private Context applyDefaultTheme(Context originalContext) { 3537 TypedArray a = originalContext.obtainStyledAttributes( 3538 new int[]{com.android.internal.R.attr.isLightTheme}); 3539 boolean isLightTheme = a.getBoolean(0, true); 3540 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3541 : R.style.ThemeOverlay_Material_Dark; 3542 a.recycle(); 3543 return new ContextThemeWrapper(originalContext, themeId); 3544 } 3545 3546 @Override 3547 protected void createPopupWindow() { 3548 mPopupWindow = new CustomPopupWindow(); 3549 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3550 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3551 mPopupWindow.setFocusable(true); 3552 mPopupWindow.setClippingEnabled(false); 3553 } 3554 3555 @Override 3556 protected void initContentView() { 3557 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3558 Context.LAYOUT_INFLATER_SERVICE); 3559 mContentView = (ViewGroup) inflater.inflate( 3560 mTextView.mTextEditSuggestionContainerLayout, null); 3561 3562 mContainerView = (LinearLayout) mContentView.findViewById( 3563 com.android.internal.R.id.suggestionWindowContainer); 3564 ViewGroup.MarginLayoutParams lp = 3565 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3566 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3567 mContainerMarginTop = lp.topMargin; 3568 mClippingLimitLeft = lp.leftMargin; 3569 mClippingLimitRight = lp.rightMargin; 3570 3571 mSuggestionListView = (ListView) mContentView.findViewById( 3572 com.android.internal.R.id.suggestionContainer); 3573 3574 mSuggestionsAdapter = new SuggestionAdapter(); 3575 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3576 mSuggestionListView.setOnItemClickListener(this); 3577 3578 // Inflate the suggestion items once and for all. 3579 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3580 for (int i = 0; i < mSuggestionInfos.length; i++) { 3581 mSuggestionInfos[i] = new SuggestionInfo(); 3582 } 3583 3584 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3585 com.android.internal.R.id.addToDictionaryButton); 3586 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3587 public void onClick(View v) { 3588 final SuggestionSpan misspelledSpan = 3589 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3590 if (misspelledSpan == null) { 3591 // Span has been removed. 3592 return; 3593 } 3594 final Editable editable = (Editable) mTextView.getText(); 3595 final int spanStart = editable.getSpanStart(misspelledSpan); 3596 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3597 if (spanStart < 0 || spanEnd <= spanStart) { 3598 return; 3599 } 3600 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3601 3602 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3603 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3604 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3605 mTextView.getTextServicesLocale().toString()); 3606 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3607 mTextView.getContext().startActivity(intent); 3608 // There is no way to know if the word was indeed added. Re-check. 3609 // TODO The ExtractEditText should remove the span in the original text instead 3610 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3611 Selection.setSelection(editable, spanEnd); 3612 updateSpellCheckSpans(spanStart, spanEnd, false); 3613 hideWithCleanUp(); 3614 } 3615 }); 3616 3617 mDeleteButton = (TextView) mContentView.findViewById( 3618 com.android.internal.R.id.deleteButton); 3619 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3620 public void onClick(View v) { 3621 final Editable editable = (Editable) mTextView.getText(); 3622 3623 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3624 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3625 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3626 // Do not leave two adjacent spaces after deletion, or one at beginning of 3627 // text 3628 if (spanUnionEnd < editable.length() 3629 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3630 && (spanUnionStart == 0 3631 || Character.isSpaceChar( 3632 editable.charAt(spanUnionStart - 1)))) { 3633 spanUnionEnd = spanUnionEnd + 1; 3634 } 3635 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3636 } 3637 hideWithCleanUp(); 3638 } 3639 }); 3640 3641 } 3642 3643 public boolean isShowingUp() { 3644 return mIsShowingUp; 3645 } 3646 3647 public void onParentLostFocus() { 3648 mIsShowingUp = false; 3649 } 3650 3651 private class SuggestionAdapter extends BaseAdapter { 3652 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3653 Context.LAYOUT_INFLATER_SERVICE); 3654 3655 @Override 3656 public int getCount() { 3657 return mNumberOfSuggestions; 3658 } 3659 3660 @Override 3661 public Object getItem(int position) { 3662 return mSuggestionInfos[position]; 3663 } 3664 3665 @Override 3666 public long getItemId(int position) { 3667 return position; 3668 } 3669 3670 @Override 3671 public View getView(int position, View convertView, ViewGroup parent) { 3672 TextView textView = (TextView) convertView; 3673 3674 if (textView == null) { 3675 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3676 parent, false); 3677 } 3678 3679 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3680 textView.setText(suggestionInfo.mText); 3681 return textView; 3682 } 3683 } 3684 3685 @VisibleForTesting 3686 public ViewGroup getContentViewForTesting() { 3687 return mContentView; 3688 } 3689 3690 @Override 3691 public void show() { 3692 if (!(mTextView.getText() instanceof Editable)) return; 3693 if (extractedTextModeWillBeStarted()) { 3694 return; 3695 } 3696 3697 if (updateSuggestions()) { 3698 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3699 mTextView.setCursorVisible(false); 3700 mIsShowingUp = true; 3701 super.show(); 3702 } 3703 3704 mSuggestionListView.setVisibility(mNumberOfSuggestions == 0 ? View.GONE : View.VISIBLE); 3705 } 3706 3707 @Override 3708 protected void measureContent() { 3709 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3710 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3711 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3712 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3713 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3714 3715 int width = 0; 3716 View view = null; 3717 for (int i = 0; i < mNumberOfSuggestions; i++) { 3718 view = mSuggestionsAdapter.getView(i, view, mContentView); 3719 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3720 view.measure(horizontalMeasure, verticalMeasure); 3721 width = Math.max(width, view.getMeasuredWidth()); 3722 } 3723 3724 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3725 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3726 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3727 } 3728 3729 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3730 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3731 3732 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3733 + mContainerMarginWidth; 3734 3735 // Enforce the width based on actual text widths 3736 mContentView.measure( 3737 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3738 verticalMeasure); 3739 3740 Drawable popupBackground = mPopupWindow.getBackground(); 3741 if (popupBackground != null) { 3742 if (mTempRect == null) mTempRect = new Rect(); 3743 popupBackground.getPadding(mTempRect); 3744 width += mTempRect.left + mTempRect.right; 3745 } 3746 mPopupWindow.setWidth(width); 3747 } 3748 3749 @Override 3750 protected int getTextOffset() { 3751 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3752 } 3753 3754 @Override 3755 protected int getVerticalLocalPosition(int line) { 3756 final Layout layout = mTextView.getLayout(); 3757 return layout.getLineBottomWithoutSpacing(line) - mContainerMarginTop; 3758 } 3759 3760 @Override 3761 protected int clipVertically(int positionY) { 3762 final int height = mContentView.getMeasuredHeight(); 3763 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3764 return Math.min(positionY, displayMetrics.heightPixels - height); 3765 } 3766 3767 private void hideWithCleanUp() { 3768 for (final SuggestionInfo info : mSuggestionInfos) { 3769 info.clear(); 3770 } 3771 mMisspelledSpanInfo.clear(); 3772 hide(); 3773 } 3774 3775 private boolean updateSuggestions() { 3776 Spannable spannable = (Spannable) mTextView.getText(); 3777 mNumberOfSuggestions = 3778 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3779 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3780 return false; 3781 } 3782 3783 int spanUnionStart = mTextView.getText().length(); 3784 int spanUnionEnd = 0; 3785 3786 for (int i = 0; i < mNumberOfSuggestions; i++) { 3787 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3788 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3789 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3790 } 3791 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3792 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3793 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3794 } 3795 3796 for (int i = 0; i < mNumberOfSuggestions; i++) { 3797 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3798 } 3799 3800 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3801 int addToDictionaryButtonVisibility = View.GONE; 3802 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3803 if (mMisspelledSpanInfo.mSpanStart >= 0 3804 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3805 addToDictionaryButtonVisibility = View.VISIBLE; 3806 } 3807 } 3808 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3809 3810 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3811 final int underlineColor; 3812 if (mNumberOfSuggestions != 0) { 3813 underlineColor = 3814 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3815 } else { 3816 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3817 } 3818 3819 if (underlineColor == 0) { 3820 // Fallback on the default highlight color when the first span does not provide one 3821 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3822 } else { 3823 final float BACKGROUND_TRANSPARENCY = 0.4f; 3824 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3825 mSuggestionRangeSpan.setBackgroundColor( 3826 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3827 } 3828 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3829 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3830 3831 mSuggestionsAdapter.notifyDataSetChanged(); 3832 return true; 3833 } 3834 3835 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3836 int unionEnd) { 3837 final Spannable text = (Spannable) mTextView.getText(); 3838 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3839 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3840 3841 // Adjust the start/end of the suggestion span 3842 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3843 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3844 + suggestionInfo.mText.length(); 3845 3846 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3847 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3848 3849 // Add the text before and after the span. 3850 final String textAsString = text.toString(); 3851 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3852 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3853 } 3854 3855 @Override 3856 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3857 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3858 replaceWithSuggestion(suggestionInfo); 3859 hideWithCleanUp(); 3860 } 3861 } 3862 3863 /** 3864 * An ActionMode Callback class that is used to provide actions while in text insertion or 3865 * selection mode. 3866 * 3867 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3868 * actions, depending on which of these this TextView supports and the current selection. 3869 */ 3870 private class TextActionModeCallback extends ActionMode.Callback2 { 3871 private final Path mSelectionPath = new Path(); 3872 private final RectF mSelectionBounds = new RectF(); 3873 private final boolean mHasSelection; 3874 private final int mHandleHeight; 3875 private final Map<MenuItem, OnClickListener> mAssistClickHandlers = new HashMap<>(); 3876 3877 TextActionModeCallback(@TextActionMode int mode) { 3878 mHasSelection = mode == TextActionMode.SELECTION 3879 || (mTextIsSelectable && mode == TextActionMode.TEXT_LINK); 3880 if (mHasSelection) { 3881 SelectionModifierCursorController selectionController = getSelectionController(); 3882 if (selectionController.mStartHandle == null) { 3883 // As these are for initializing selectionController, hide() must be called. 3884 selectionController.initDrawables(); 3885 selectionController.initHandles(); 3886 selectionController.hide(); 3887 } 3888 mHandleHeight = Math.max( 3889 mSelectHandleLeft.getMinimumHeight(), 3890 mSelectHandleRight.getMinimumHeight()); 3891 } else { 3892 InsertionPointCursorController insertionController = getInsertionController(); 3893 if (insertionController != null) { 3894 insertionController.getHandle(); 3895 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3896 } else { 3897 mHandleHeight = 0; 3898 } 3899 } 3900 } 3901 3902 @Override 3903 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3904 mAssistClickHandlers.clear(); 3905 3906 mode.setTitle(null); 3907 mode.setSubtitle(null); 3908 mode.setTitleOptionalHint(true); 3909 populateMenuWithItems(menu); 3910 3911 Callback customCallback = getCustomCallback(); 3912 if (customCallback != null) { 3913 if (!customCallback.onCreateActionMode(mode, menu)) { 3914 // The custom mode can choose to cancel the action mode, dismiss selection. 3915 Selection.setSelection((Spannable) mTextView.getText(), 3916 mTextView.getSelectionEnd()); 3917 return false; 3918 } 3919 } 3920 3921 if (mTextView.canProcessText()) { 3922 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3923 } 3924 3925 if (mHasSelection && !mTextView.hasTransientState()) { 3926 mTextView.setHasTransientState(true); 3927 } 3928 return true; 3929 } 3930 3931 private Callback getCustomCallback() { 3932 return mHasSelection 3933 ? mCustomSelectionActionModeCallback 3934 : mCustomInsertionActionModeCallback; 3935 } 3936 3937 private void populateMenuWithItems(Menu menu) { 3938 if (mTextView.canCut()) { 3939 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3940 com.android.internal.R.string.cut) 3941 .setAlphabeticShortcut('x') 3942 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3943 } 3944 3945 if (mTextView.canCopy()) { 3946 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3947 com.android.internal.R.string.copy) 3948 .setAlphabeticShortcut('c') 3949 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3950 } 3951 3952 if (mTextView.canPaste()) { 3953 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3954 com.android.internal.R.string.paste) 3955 .setAlphabeticShortcut('v') 3956 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3957 } 3958 3959 if (mTextView.canShare()) { 3960 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3961 com.android.internal.R.string.share) 3962 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3963 } 3964 3965 if (mTextView.canRequestAutofill()) { 3966 final String selected = mTextView.getSelectedText(); 3967 if (selected == null || selected.isEmpty()) { 3968 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3969 com.android.internal.R.string.autofill) 3970 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 3971 } 3972 } 3973 3974 if (mTextView.canPasteAsPlainText()) { 3975 menu.add( 3976 Menu.NONE, 3977 TextView.ID_PASTE_AS_PLAIN_TEXT, 3978 MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 3979 com.android.internal.R.string.paste_as_plain_text) 3980 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3981 } 3982 3983 updateSelectAllItem(menu); 3984 updateReplaceItem(menu); 3985 updateAssistMenuItems(menu); 3986 } 3987 3988 @Override 3989 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3990 updateSelectAllItem(menu); 3991 updateReplaceItem(menu); 3992 updateAssistMenuItems(menu); 3993 3994 Callback customCallback = getCustomCallback(); 3995 if (customCallback != null) { 3996 return customCallback.onPrepareActionMode(mode, menu); 3997 } 3998 return true; 3999 } 4000 4001 private void updateSelectAllItem(Menu menu) { 4002 boolean canSelectAll = mTextView.canSelectAllText(); 4003 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 4004 if (canSelectAll && !selectAllItemExists) { 4005 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 4006 com.android.internal.R.string.selectAll) 4007 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 4008 } else if (!canSelectAll && selectAllItemExists) { 4009 menu.removeItem(TextView.ID_SELECT_ALL); 4010 } 4011 } 4012 4013 private void updateReplaceItem(Menu menu) { 4014 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 4015 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 4016 if (canReplace && !replaceItemExists) { 4017 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 4018 com.android.internal.R.string.replace) 4019 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 4020 } else if (!canReplace && replaceItemExists) { 4021 menu.removeItem(TextView.ID_REPLACE); 4022 } 4023 } 4024 4025 private void updateAssistMenuItems(Menu menu) { 4026 clearAssistMenuItems(menu); 4027 if (!shouldEnableAssistMenuItems()) { 4028 return; 4029 } 4030 final TextClassification textClassification = 4031 getSelectionActionModeHelper().getTextClassification(); 4032 if (textClassification == null) { 4033 return; 4034 } 4035 final OnClickListener onClick = getSupportedOnClickListener( 4036 textClassification.getIcon(), 4037 textClassification.getLabel(), 4038 textClassification.getIntent()); 4039 if (onClick != null) { 4040 final MenuItem item = menu.add( 4041 TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, 4042 textClassification.getLabel()) 4043 .setIcon(textClassification.getIcon()) 4044 .setIntent(textClassification.getIntent()); 4045 item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 4046 mAssistClickHandlers.put( 4047 item, TextClassification.createIntentOnClickListener( 4048 mTextView.getContext(), textClassification.getIntent())); 4049 } 4050 final int count = textClassification.getSecondaryActionsCount(); 4051 for (int i = 0; i < count; i++) { 4052 final OnClickListener onClick1 = getSupportedOnClickListener( 4053 textClassification.getSecondaryIcon(i), 4054 textClassification.getSecondaryLabel(i), 4055 textClassification.getSecondaryIntent(i)); 4056 if (onClick1 == null) { 4057 continue; 4058 } 4059 final int order = MENU_ITEM_ORDER_SECONDARY_ASSIST_ACTIONS_START + i; 4060 final MenuItem item = menu.add( 4061 TextView.ID_ASSIST, Menu.NONE, order, 4062 textClassification.getSecondaryLabel(i)) 4063 .setIcon(textClassification.getSecondaryIcon(i)) 4064 .setIntent(textClassification.getSecondaryIntent(i)); 4065 item.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 4066 mAssistClickHandlers.put(item, 4067 TextClassification.createIntentOnClickListener( 4068 mTextView.getContext(), textClassification.getSecondaryIntent(i))); 4069 } 4070 } 4071 4072 private void clearAssistMenuItems(Menu menu) { 4073 int i = 0; 4074 while (i < menu.size()) { 4075 final MenuItem menuItem = menu.getItem(i); 4076 if (menuItem.getGroupId() == TextView.ID_ASSIST) { 4077 menu.removeItem(menuItem.getItemId()); 4078 continue; 4079 } 4080 i++; 4081 } 4082 } 4083 4084 @Nullable 4085 private OnClickListener getSupportedOnClickListener( 4086 Drawable icon, CharSequence label, Intent intent) { 4087 final boolean hasUi = icon != null || !TextUtils.isEmpty(label); 4088 if (hasUi) { 4089 return TextClassification.createIntentOnClickListener( 4090 mTextView.getContext(), intent); 4091 } 4092 return null; 4093 } 4094 4095 private boolean onAssistMenuItemClicked(MenuItem assistMenuItem) { 4096 Preconditions.checkArgument(assistMenuItem.getGroupId() == TextView.ID_ASSIST); 4097 4098 final TextClassification textClassification = 4099 getSelectionActionModeHelper().getTextClassification(); 4100 if (!shouldEnableAssistMenuItems() || textClassification == null) { 4101 // No textClassification result to handle the click. Eat the click. 4102 return true; 4103 } 4104 4105 OnClickListener onClickListener = mAssistClickHandlers.get(assistMenuItem); 4106 if (onClickListener == null) { 4107 final Intent intent = assistMenuItem.getIntent(); 4108 if (intent != null) { 4109 onClickListener = TextClassification.createIntentOnClickListener( 4110 mTextView.getContext(), intent); 4111 } 4112 } 4113 if (onClickListener != null) { 4114 onClickListener.onClick(mTextView); 4115 stopTextActionMode(); 4116 } 4117 // We tried our best. 4118 return true; 4119 } 4120 4121 private boolean shouldEnableAssistMenuItems() { 4122 return mTextView.isDeviceProvisioned() 4123 && TextClassificationManager.getSettings(mTextView.getContext()) 4124 .isSmartTextShareEnabled(); 4125 } 4126 4127 @Override 4128 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 4129 getSelectionActionModeHelper().onSelectionAction(item.getItemId()); 4130 4131 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 4132 return true; 4133 } 4134 Callback customCallback = getCustomCallback(); 4135 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 4136 return true; 4137 } 4138 if (item.getGroupId() == TextView.ID_ASSIST && onAssistMenuItemClicked(item)) { 4139 return true; 4140 } 4141 return mTextView.onTextContextMenuItem(item.getItemId()); 4142 } 4143 4144 @Override 4145 public void onDestroyActionMode(ActionMode mode) { 4146 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 4147 getSelectionActionModeHelper().onDestroyActionMode(); 4148 mTextActionMode = null; 4149 Callback customCallback = getCustomCallback(); 4150 if (customCallback != null) { 4151 customCallback.onDestroyActionMode(mode); 4152 } 4153 4154 if (!mPreserveSelection) { 4155 /* 4156 * Leave current selection when we tentatively destroy action mode for the 4157 * selection. If we're detaching from a window, we'll bring back the selection 4158 * mode when (if) we get reattached. 4159 */ 4160 Selection.setSelection((Spannable) mTextView.getText(), 4161 mTextView.getSelectionEnd()); 4162 } 4163 4164 if (mSelectionModifierCursorController != null) { 4165 mSelectionModifierCursorController.hide(); 4166 } 4167 4168 mAssistClickHandlers.clear(); 4169 } 4170 4171 @Override 4172 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 4173 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 4174 super.onGetContentRect(mode, view, outRect); 4175 return; 4176 } 4177 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 4178 // We have a selection. 4179 mSelectionPath.reset(); 4180 mTextView.getLayout().getSelectionPath( 4181 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 4182 mSelectionPath.computeBounds(mSelectionBounds, true); 4183 mSelectionBounds.bottom += mHandleHeight; 4184 } else { 4185 // We have a cursor. 4186 Layout layout = mTextView.getLayout(); 4187 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 4188 float primaryHorizontal = clampHorizontalPosition(null, 4189 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 4190 mSelectionBounds.set( 4191 primaryHorizontal, 4192 layout.getLineTop(line), 4193 primaryHorizontal, 4194 layout.getLineBottom(line) + mHandleHeight); 4195 } 4196 // Take TextView's padding and scroll into account. 4197 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4198 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4199 outRect.set( 4200 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4201 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4202 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4203 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4204 } 4205 } 4206 4207 /** 4208 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4209 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4210 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4211 */ 4212 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4213 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4214 final int[] mTmpIntOffset = new int[2]; 4215 final Matrix mViewToScreenMatrix = new Matrix(); 4216 4217 @Override 4218 public void updatePosition(int parentPositionX, int parentPositionY, 4219 boolean parentPositionChanged, boolean parentScrolled) { 4220 final InputMethodState ims = mInputMethodState; 4221 if (ims == null || ims.mBatchEditNesting > 0) { 4222 return; 4223 } 4224 final InputMethodManager imm = InputMethodManager.peekInstance(); 4225 if (null == imm) { 4226 return; 4227 } 4228 if (!imm.isActive(mTextView)) { 4229 return; 4230 } 4231 // Skip if the IME has not requested the cursor/anchor position. 4232 if (!imm.isCursorAnchorInfoEnabled()) { 4233 return; 4234 } 4235 Layout layout = mTextView.getLayout(); 4236 if (layout == null) { 4237 return; 4238 } 4239 4240 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4241 builder.reset(); 4242 4243 final int selectionStart = mTextView.getSelectionStart(); 4244 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4245 4246 // Construct transformation matrix from view local coordinates to screen coordinates. 4247 mViewToScreenMatrix.set(mTextView.getMatrix()); 4248 mTextView.getLocationOnScreen(mTmpIntOffset); 4249 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4250 builder.setMatrix(mViewToScreenMatrix); 4251 4252 final float viewportToContentHorizontalOffset = 4253 mTextView.viewportToContentHorizontalOffset(); 4254 final float viewportToContentVerticalOffset = 4255 mTextView.viewportToContentVerticalOffset(); 4256 4257 final CharSequence text = mTextView.getText(); 4258 if (text instanceof Spannable) { 4259 final Spannable sp = (Spannable) text; 4260 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4261 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4262 if (composingTextEnd < composingTextStart) { 4263 final int temp = composingTextEnd; 4264 composingTextEnd = composingTextStart; 4265 composingTextStart = temp; 4266 } 4267 final boolean hasComposingText = 4268 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4269 if (hasComposingText) { 4270 final CharSequence composingText = text.subSequence(composingTextStart, 4271 composingTextEnd); 4272 builder.setComposingText(composingTextStart, composingText); 4273 mTextView.populateCharacterBounds(builder, composingTextStart, 4274 composingTextEnd, viewportToContentHorizontalOffset, 4275 viewportToContentVerticalOffset); 4276 } 4277 } 4278 4279 // Treat selectionStart as the insertion point. 4280 if (0 <= selectionStart) { 4281 final int offset = selectionStart; 4282 final int line = layout.getLineForOffset(offset); 4283 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4284 + viewportToContentHorizontalOffset; 4285 final float insertionMarkerTop = layout.getLineTop(line) 4286 + viewportToContentVerticalOffset; 4287 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4288 + viewportToContentVerticalOffset; 4289 final float insertionMarkerBottom = layout.getLineBottomWithoutSpacing(line) 4290 + viewportToContentVerticalOffset; 4291 final boolean isTopVisible = mTextView 4292 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4293 final boolean isBottomVisible = mTextView 4294 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4295 int insertionMarkerFlags = 0; 4296 if (isTopVisible || isBottomVisible) { 4297 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4298 } 4299 if (!isTopVisible || !isBottomVisible) { 4300 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4301 } 4302 if (layout.isRtlCharAt(offset)) { 4303 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4304 } 4305 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4306 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4307 } 4308 4309 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4310 } 4311 } 4312 4313 @VisibleForTesting 4314 public abstract class HandleView extends View implements TextViewPositionListener { 4315 protected Drawable mDrawable; 4316 protected Drawable mDrawableLtr; 4317 protected Drawable mDrawableRtl; 4318 private final PopupWindow mContainer; 4319 // Position with respect to the parent TextView 4320 private int mPositionX, mPositionY; 4321 private boolean mIsDragging; 4322 // Offset from touch position to mPosition 4323 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4324 protected int mHotspotX; 4325 protected int mHorizontalGravity; 4326 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4327 private float mTouchOffsetY; 4328 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4329 private float mIdealVerticalOffset; 4330 // Parent's (TextView) previous position in window 4331 private int mLastParentX, mLastParentY; 4332 // Parent's (TextView) previous position on screen 4333 private int mLastParentXOnScreen, mLastParentYOnScreen; 4334 // Previous text character offset 4335 protected int mPreviousOffset = -1; 4336 // Previous text character offset 4337 private boolean mPositionHasChanged = true; 4338 // Minimum touch target size for handles 4339 private int mMinSize; 4340 // Indicates the line of text that the handle is on. 4341 protected int mPrevLine = UNSET_LINE; 4342 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4343 // when selecting text when the handles jump to the end / start of words which may be on 4344 // a different line. 4345 protected int mPreviousLineTouched = UNSET_LINE; 4346 4347 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4348 super(mTextView.getContext()); 4349 setId(id); 4350 mContainer = new PopupWindow(mTextView.getContext(), null, 4351 com.android.internal.R.attr.textSelectHandleWindowStyle); 4352 mContainer.setSplitTouchEnabled(true); 4353 mContainer.setClippingEnabled(false); 4354 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4355 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4356 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4357 mContainer.setContentView(this); 4358 4359 mDrawableLtr = drawableLtr; 4360 mDrawableRtl = drawableRtl; 4361 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4362 com.android.internal.R.dimen.text_handle_min_size); 4363 4364 updateDrawable(); 4365 4366 final int handleHeight = getPreferredHeight(); 4367 mTouchOffsetY = -0.3f * handleHeight; 4368 mIdealVerticalOffset = 0.7f * handleHeight; 4369 } 4370 4371 public float getIdealVerticalOffset() { 4372 return mIdealVerticalOffset; 4373 } 4374 4375 protected void updateDrawable() { 4376 if (mIsDragging) { 4377 // Don't update drawable during dragging. 4378 return; 4379 } 4380 final Layout layout = mTextView.getLayout(); 4381 if (layout == null) { 4382 return; 4383 } 4384 final int offset = getCurrentCursorOffset(); 4385 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4386 final Drawable oldDrawable = mDrawable; 4387 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4388 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4389 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4390 if (oldDrawable != mDrawable && isShowing()) { 4391 // Update popup window position. 4392 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4393 - getHorizontalOffset() + getCursorOffset(); 4394 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4395 mPositionHasChanged = true; 4396 updatePosition(mLastParentX, mLastParentY, false, false); 4397 postInvalidate(); 4398 } 4399 } 4400 4401 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4402 protected abstract int getHorizontalGravity(boolean isRtlRun); 4403 4404 // Touch-up filter: number of previous positions remembered 4405 private static final int HISTORY_SIZE = 5; 4406 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4407 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4408 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4409 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4410 private int mPreviousOffsetIndex = 0; 4411 private int mNumberPreviousOffsets = 0; 4412 4413 private void startTouchUpFilter(int offset) { 4414 mNumberPreviousOffsets = 0; 4415 addPositionToTouchUpFilter(offset); 4416 } 4417 4418 private void addPositionToTouchUpFilter(int offset) { 4419 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4420 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4421 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4422 mNumberPreviousOffsets++; 4423 } 4424 4425 private void filterOnTouchUp(boolean fromTouchScreen) { 4426 final long now = SystemClock.uptimeMillis(); 4427 int i = 0; 4428 int index = mPreviousOffsetIndex; 4429 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4430 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4431 i++; 4432 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4433 } 4434 4435 if (i > 0 && i < iMax 4436 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4437 positionAtCursorOffset(mPreviousOffsets[index], false, fromTouchScreen); 4438 } 4439 } 4440 4441 public boolean offsetHasBeenChanged() { 4442 return mNumberPreviousOffsets > 1; 4443 } 4444 4445 @Override 4446 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4447 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4448 } 4449 4450 @Override 4451 public void invalidate() { 4452 super.invalidate(); 4453 if (isShowing()) { 4454 positionAtCursorOffset(getCurrentCursorOffset(), true, false); 4455 } 4456 }; 4457 4458 private int getPreferredWidth() { 4459 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4460 } 4461 4462 private int getPreferredHeight() { 4463 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4464 } 4465 4466 public void show() { 4467 if (isShowing()) return; 4468 4469 getPositionListener().addSubscriber(this, true /* local position may change */); 4470 4471 // Make sure the offset is always considered new, even when focusing at same position 4472 mPreviousOffset = -1; 4473 positionAtCursorOffset(getCurrentCursorOffset(), false, false); 4474 } 4475 4476 protected void dismiss() { 4477 mIsDragging = false; 4478 mContainer.dismiss(); 4479 onDetached(); 4480 } 4481 4482 public void hide() { 4483 dismiss(); 4484 4485 getPositionListener().removeSubscriber(this); 4486 } 4487 4488 public boolean isShowing() { 4489 return mContainer.isShowing(); 4490 } 4491 4492 private boolean isVisible() { 4493 // Always show a dragging handle. 4494 if (mIsDragging) { 4495 return true; 4496 } 4497 4498 if (mTextView.isInBatchEditMode()) { 4499 return false; 4500 } 4501 4502 return mTextView.isPositionVisible( 4503 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4504 } 4505 4506 public abstract int getCurrentCursorOffset(); 4507 4508 protected abstract void updateSelection(int offset); 4509 4510 protected abstract void updatePosition(float x, float y, boolean fromTouchScreen); 4511 4512 @MagnifierHandleTrigger 4513 protected abstract int getMagnifierHandleTrigger(); 4514 4515 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4516 return layout.isRtlCharAt(offset); 4517 } 4518 4519 @VisibleForTesting 4520 public float getHorizontal(@NonNull Layout layout, int offset) { 4521 return layout.getPrimaryHorizontal(offset); 4522 } 4523 4524 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4525 return mTextView.getOffsetAtCoordinate(line, x); 4526 } 4527 4528 /** 4529 * @param offset Cursor offset. Must be in [-1, length]. 4530 * @param forceUpdatePosition whether to force update the position. This should be true 4531 * when If the parent has been scrolled, for example. 4532 * @param fromTouchScreen {@code true} if the cursor is moved with motion events from the 4533 * touch screen. 4534 */ 4535 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4536 boolean fromTouchScreen) { 4537 // A HandleView relies on the layout, which may be nulled by external methods 4538 Layout layout = mTextView.getLayout(); 4539 if (layout == null) { 4540 // Will update controllers' state, hiding them and stopping selection mode if needed 4541 prepareCursorControllers(); 4542 return; 4543 } 4544 layout = mTextView.getLayout(); 4545 4546 boolean offsetChanged = offset != mPreviousOffset; 4547 if (offsetChanged || forceUpdatePosition) { 4548 if (offsetChanged) { 4549 updateSelection(offset); 4550 if (fromTouchScreen && mHapticTextHandleEnabled) { 4551 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 4552 } 4553 addPositionToTouchUpFilter(offset); 4554 } 4555 final int line = layout.getLineForOffset(offset); 4556 mPrevLine = line; 4557 4558 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4559 - getHorizontalOffset() + getCursorOffset(); 4560 mPositionY = layout.getLineBottomWithoutSpacing(line); 4561 4562 // Take TextView's padding and scroll into account. 4563 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4564 mPositionY += mTextView.viewportToContentVerticalOffset(); 4565 4566 mPreviousOffset = offset; 4567 mPositionHasChanged = true; 4568 } 4569 } 4570 4571 /** 4572 * Return the clamped horizontal position for the cursor. 4573 * 4574 * @param layout Text layout. 4575 * @param offset Character offset for the cursor. 4576 * @return The clamped horizontal position for the cursor. 4577 */ 4578 int getCursorHorizontalPosition(Layout layout, int offset) { 4579 return (int) (getHorizontal(layout, offset) - 0.5f); 4580 } 4581 4582 @Override 4583 public void updatePosition(int parentPositionX, int parentPositionY, 4584 boolean parentPositionChanged, boolean parentScrolled) { 4585 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled, false); 4586 if (parentPositionChanged || mPositionHasChanged) { 4587 if (mIsDragging) { 4588 // Update touchToWindow offset in case of parent scrolling while dragging 4589 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4590 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4591 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4592 mLastParentX = parentPositionX; 4593 mLastParentY = parentPositionY; 4594 } 4595 4596 onHandleMoved(); 4597 } 4598 4599 if (isVisible()) { 4600 // Transform to the window coordinates to follow the view tranformation. 4601 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4602 mTextView.transformFromViewToWindowSpace(pts); 4603 pts[0] -= mHotspotX + getHorizontalOffset(); 4604 4605 if (isShowing()) { 4606 mContainer.update(pts[0], pts[1], -1, -1); 4607 } else { 4608 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4609 } 4610 } else { 4611 if (isShowing()) { 4612 dismiss(); 4613 } 4614 } 4615 4616 mPositionHasChanged = false; 4617 } 4618 } 4619 4620 @Override 4621 protected void onDraw(Canvas c) { 4622 final int drawWidth = mDrawable.getIntrinsicWidth(); 4623 final int left = getHorizontalOffset(); 4624 4625 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4626 mDrawable.draw(c); 4627 } 4628 4629 private int getHorizontalOffset() { 4630 final int width = getPreferredWidth(); 4631 final int drawWidth = mDrawable.getIntrinsicWidth(); 4632 final int left; 4633 switch (mHorizontalGravity) { 4634 case Gravity.LEFT: 4635 left = 0; 4636 break; 4637 default: 4638 case Gravity.CENTER: 4639 left = (width - drawWidth) / 2; 4640 break; 4641 case Gravity.RIGHT: 4642 left = width - drawWidth; 4643 break; 4644 } 4645 return left; 4646 } 4647 4648 protected int getCursorOffset() { 4649 return 0; 4650 } 4651 4652 /** 4653 * Computes the position where the magnifier should be shown, relative to 4654 * {@code mTextView}, and writes them to {@code showPosInView}. Also decides 4655 * whether the magnifier should be shown or dismissed after this touch event. 4656 * @return Whether the magnifier should be shown at the computed coordinates or dismissed. 4657 */ 4658 private boolean obtainMagnifierShowCoordinates(@NonNull final MotionEvent event, 4659 final PointF showPosInView) { 4660 4661 final int trigger = getMagnifierHandleTrigger(); 4662 final int offset; 4663 switch (trigger) { 4664 case MagnifierHandleTrigger.INSERTION: // Fall through. 4665 case MagnifierHandleTrigger.SELECTION_START: 4666 offset = mTextView.getSelectionStart(); 4667 break; 4668 case MagnifierHandleTrigger.SELECTION_END: 4669 offset = mTextView.getSelectionEnd(); 4670 break; 4671 default: 4672 offset = -1; 4673 break; 4674 } 4675 4676 if (offset == -1) { 4677 return false; 4678 } 4679 4680 final Layout layout = mTextView.getLayout(); 4681 final int lineNumber = layout.getLineForOffset(offset); 4682 4683 // Horizontally move the magnifier smoothly but clamp inside the current line. 4684 final int[] textViewLocationOnScreen = new int[2]; 4685 mTextView.getLocationOnScreen(textViewLocationOnScreen); 4686 final float touchXInView = event.getRawX() - textViewLocationOnScreen[0]; 4687 final float lineLeft = mTextView.getLayout().getLineLeft(lineNumber) 4688 + mTextView.getTotalPaddingLeft() - mTextView.getScrollX(); 4689 final float lineRight = mTextView.getLayout().getLineRight(lineNumber) 4690 + mTextView.getTotalPaddingLeft() - mTextView.getScrollX(); 4691 final float contentWidth = Math.round(mMagnifier.getWidth() / mMagnifier.getZoom()); 4692 if (touchXInView < lineLeft - contentWidth / 2 4693 || touchXInView > lineRight + contentWidth / 2) { 4694 // The touch is too out of the bounds of the current line, so hide the magnifier. 4695 return false; 4696 } 4697 showPosInView.x = Math.max(lineLeft, Math.min(lineRight, touchXInView)); 4698 4699 // Vertically snap to middle of current line. 4700 showPosInView.y = (mTextView.getLayout().getLineTop(lineNumber) 4701 + mTextView.getLayout().getLineBottom(lineNumber)) / 2.0f 4702 + mTextView.getTotalPaddingTop() - mTextView.getScrollY(); 4703 4704 return true; 4705 } 4706 4707 protected final void updateMagnifier(@NonNull final MotionEvent event) { 4708 if (mMagnifier == null) { 4709 return; 4710 } 4711 4712 final PointF showPosInView = new PointF(); 4713 final boolean shouldShow = obtainMagnifierShowCoordinates(event, showPosInView); 4714 if (shouldShow) { 4715 // Make the cursor visible and stop blinking. 4716 mRenderCursorRegardlessTiming = true; 4717 mTextView.invalidateCursorPath(); 4718 suspendBlink(); 4719 mMagnifier.show(showPosInView.x, showPosInView.y); 4720 } else { 4721 dismissMagnifier(); 4722 } 4723 } 4724 4725 protected final void dismissMagnifier() { 4726 if (mMagnifier != null) { 4727 mMagnifier.dismiss(); 4728 mRenderCursorRegardlessTiming = false; 4729 resumeBlink(); 4730 } 4731 } 4732 4733 @Override 4734 public boolean onTouchEvent(MotionEvent ev) { 4735 updateFloatingToolbarVisibility(ev); 4736 4737 switch (ev.getActionMasked()) { 4738 case MotionEvent.ACTION_DOWN: { 4739 startTouchUpFilter(getCurrentCursorOffset()); 4740 4741 final PositionListener positionListener = getPositionListener(); 4742 mLastParentX = positionListener.getPositionX(); 4743 mLastParentY = positionListener.getPositionY(); 4744 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4745 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4746 4747 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4748 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4749 mTouchToWindowOffsetX = xInWindow - mPositionX; 4750 mTouchToWindowOffsetY = yInWindow - mPositionY; 4751 4752 mIsDragging = true; 4753 mPreviousLineTouched = UNSET_LINE; 4754 break; 4755 } 4756 4757 case MotionEvent.ACTION_MOVE: { 4758 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4759 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4760 4761 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4762 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4763 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4764 float newVerticalOffset; 4765 if (previousVerticalOffset < mIdealVerticalOffset) { 4766 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4767 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4768 } else { 4769 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4770 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4771 } 4772 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4773 4774 final float newPosX = 4775 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4776 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4777 4778 updatePosition(newPosX, newPosY, 4779 ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4780 break; 4781 } 4782 4783 case MotionEvent.ACTION_UP: 4784 filterOnTouchUp(ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4785 // Fall through. 4786 case MotionEvent.ACTION_CANCEL: 4787 mIsDragging = false; 4788 updateDrawable(); 4789 break; 4790 } 4791 return true; 4792 } 4793 4794 public boolean isDragging() { 4795 return mIsDragging; 4796 } 4797 4798 void onHandleMoved() {} 4799 4800 public void onDetached() {} 4801 } 4802 4803 private class InsertionHandleView extends HandleView { 4804 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4805 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4806 4807 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4808 private float mDownPositionX, mDownPositionY; 4809 private Runnable mHider; 4810 4811 public InsertionHandleView(Drawable drawable) { 4812 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4813 } 4814 4815 @Override 4816 public void show() { 4817 super.show(); 4818 4819 final long durationSinceCutOrCopy = 4820 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4821 4822 // Cancel the single tap delayed runnable. 4823 if (mInsertionActionModeRunnable != null 4824 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4825 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4826 || isCursorInsideEasyCorrectionSpan())) { 4827 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4828 } 4829 4830 // Prepare and schedule the single tap runnable to run exactly after the double tap 4831 // timeout has passed. 4832 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4833 && !isCursorInsideEasyCorrectionSpan() 4834 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4835 if (mTextActionMode == null) { 4836 if (mInsertionActionModeRunnable == null) { 4837 mInsertionActionModeRunnable = new Runnable() { 4838 @Override 4839 public void run() { 4840 startInsertionActionMode(); 4841 } 4842 }; 4843 } 4844 mTextView.postDelayed( 4845 mInsertionActionModeRunnable, 4846 ViewConfiguration.getDoubleTapTimeout() + 1); 4847 } 4848 4849 } 4850 4851 hideAfterDelay(); 4852 } 4853 4854 private void hideAfterDelay() { 4855 if (mHider == null) { 4856 mHider = new Runnable() { 4857 public void run() { 4858 hide(); 4859 } 4860 }; 4861 } else { 4862 removeHiderCallback(); 4863 } 4864 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4865 } 4866 4867 private void removeHiderCallback() { 4868 if (mHider != null) { 4869 mTextView.removeCallbacks(mHider); 4870 } 4871 } 4872 4873 @Override 4874 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4875 return drawable.getIntrinsicWidth() / 2; 4876 } 4877 4878 @Override 4879 protected int getHorizontalGravity(boolean isRtlRun) { 4880 return Gravity.CENTER_HORIZONTAL; 4881 } 4882 4883 @Override 4884 protected int getCursorOffset() { 4885 int offset = super.getCursorOffset(); 4886 if (mDrawableForCursor != null) { 4887 mDrawableForCursor.getPadding(mTempRect); 4888 offset += (mDrawableForCursor.getIntrinsicWidth() 4889 - mTempRect.left - mTempRect.right) / 2; 4890 } 4891 return offset; 4892 } 4893 4894 @Override 4895 int getCursorHorizontalPosition(Layout layout, int offset) { 4896 if (mDrawableForCursor != null) { 4897 final float horizontal = getHorizontal(layout, offset); 4898 return clampHorizontalPosition(mDrawableForCursor, horizontal) + mTempRect.left; 4899 } 4900 return super.getCursorHorizontalPosition(layout, offset); 4901 } 4902 4903 @Override 4904 public boolean onTouchEvent(MotionEvent ev) { 4905 final boolean result = super.onTouchEvent(ev); 4906 4907 switch (ev.getActionMasked()) { 4908 case MotionEvent.ACTION_DOWN: 4909 mDownPositionX = ev.getRawX(); 4910 mDownPositionY = ev.getRawY(); 4911 updateMagnifier(ev); 4912 break; 4913 4914 case MotionEvent.ACTION_MOVE: 4915 updateMagnifier(ev); 4916 break; 4917 4918 case MotionEvent.ACTION_UP: 4919 if (!offsetHasBeenChanged()) { 4920 final float deltaX = mDownPositionX - ev.getRawX(); 4921 final float deltaY = mDownPositionY - ev.getRawY(); 4922 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4923 4924 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4925 mTextView.getContext()); 4926 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4927 4928 if (distanceSquared < touchSlop * touchSlop) { 4929 // Tapping on the handle toggles the insertion action mode. 4930 if (mTextActionMode != null) { 4931 stopTextActionMode(); 4932 } else { 4933 startInsertionActionMode(); 4934 } 4935 } 4936 } else { 4937 if (mTextActionMode != null) { 4938 mTextActionMode.invalidateContentRect(); 4939 } 4940 } 4941 // Fall through. 4942 case MotionEvent.ACTION_CANCEL: 4943 hideAfterDelay(); 4944 dismissMagnifier(); 4945 break; 4946 4947 default: 4948 break; 4949 } 4950 4951 return result; 4952 } 4953 4954 @Override 4955 public int getCurrentCursorOffset() { 4956 return mTextView.getSelectionStart(); 4957 } 4958 4959 @Override 4960 public void updateSelection(int offset) { 4961 Selection.setSelection((Spannable) mTextView.getText(), offset); 4962 } 4963 4964 @Override 4965 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4966 Layout layout = mTextView.getLayout(); 4967 int offset; 4968 if (layout != null) { 4969 if (mPreviousLineTouched == UNSET_LINE) { 4970 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4971 } 4972 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4973 offset = getOffsetAtCoordinate(layout, currLine, x); 4974 mPreviousLineTouched = currLine; 4975 } else { 4976 offset = -1; 4977 } 4978 positionAtCursorOffset(offset, false, fromTouchScreen); 4979 if (mTextActionMode != null) { 4980 invalidateActionMode(); 4981 } 4982 } 4983 4984 @Override 4985 void onHandleMoved() { 4986 super.onHandleMoved(); 4987 removeHiderCallback(); 4988 } 4989 4990 @Override 4991 public void onDetached() { 4992 super.onDetached(); 4993 removeHiderCallback(); 4994 } 4995 4996 @Override 4997 @MagnifierHandleTrigger 4998 protected int getMagnifierHandleTrigger() { 4999 return MagnifierHandleTrigger.INSERTION; 5000 } 5001 } 5002 5003 @Retention(RetentionPolicy.SOURCE) 5004 @IntDef(prefix = { "HANDLE_TYPE_" }, value = { 5005 HANDLE_TYPE_SELECTION_START, 5006 HANDLE_TYPE_SELECTION_END 5007 }) 5008 public @interface HandleType {} 5009 public static final int HANDLE_TYPE_SELECTION_START = 0; 5010 public static final int HANDLE_TYPE_SELECTION_END = 1; 5011 5012 /** For selection handles */ 5013 @VisibleForTesting 5014 public final class SelectionHandleView extends HandleView { 5015 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 5016 // end (HANDLE_TYPE_SELECTION_END). 5017 @HandleType 5018 private final int mHandleType; 5019 // Indicates whether the cursor is making adjustments within a word. 5020 private boolean mInWord = false; 5021 // Difference between touch position and word boundary position. 5022 private float mTouchWordDelta; 5023 // X value of the previous updatePosition call. 5024 private float mPrevX; 5025 // Indicates if the handle has moved a boundary between LTR and RTL text. 5026 private boolean mLanguageDirectionChanged = false; 5027 // Distance from edge of horizontally scrolling text view 5028 // to use to switch to character mode. 5029 private final float mTextViewEdgeSlop; 5030 // Used to save text view location. 5031 private final int[] mTextViewLocation = new int[2]; 5032 5033 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 5034 @HandleType int handleType) { 5035 super(drawableLtr, drawableRtl, id); 5036 mHandleType = handleType; 5037 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 5038 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 5039 } 5040 5041 private boolean isStartHandle() { 5042 return mHandleType == HANDLE_TYPE_SELECTION_START; 5043 } 5044 5045 @Override 5046 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 5047 if (isRtlRun == isStartHandle()) { 5048 return drawable.getIntrinsicWidth() / 4; 5049 } else { 5050 return (drawable.getIntrinsicWidth() * 3) / 4; 5051 } 5052 } 5053 5054 @Override 5055 protected int getHorizontalGravity(boolean isRtlRun) { 5056 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 5057 } 5058 5059 @Override 5060 public int getCurrentCursorOffset() { 5061 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 5062 } 5063 5064 @Override 5065 protected void updateSelection(int offset) { 5066 if (isStartHandle()) { 5067 Selection.setSelection((Spannable) mTextView.getText(), offset, 5068 mTextView.getSelectionEnd()); 5069 } else { 5070 Selection.setSelection((Spannable) mTextView.getText(), 5071 mTextView.getSelectionStart(), offset); 5072 } 5073 updateDrawable(); 5074 if (mTextActionMode != null) { 5075 invalidateActionMode(); 5076 } 5077 } 5078 5079 @Override 5080 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 5081 final Layout layout = mTextView.getLayout(); 5082 if (layout == null) { 5083 // HandleView will deal appropriately in positionAtCursorOffset when 5084 // layout is null. 5085 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y), 5086 fromTouchScreen); 5087 return; 5088 } 5089 5090 if (mPreviousLineTouched == UNSET_LINE) { 5091 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 5092 } 5093 5094 boolean positionCursor = false; 5095 final int anotherHandleOffset = 5096 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5097 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 5098 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 5099 5100 if (isStartHandle() && initialOffset >= anotherHandleOffset 5101 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 5102 // Handles have crossed, bound it to the first selected line and 5103 // adjust by word / char as normal. 5104 currLine = layout.getLineForOffset(anotherHandleOffset); 5105 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 5106 } 5107 5108 int offset = initialOffset; 5109 final int wordEnd = getWordEnd(offset); 5110 final int wordStart = getWordStart(offset); 5111 5112 if (mPrevX == UNSET_X_VALUE) { 5113 mPrevX = x; 5114 } 5115 5116 final int currentOffset = getCurrentCursorOffset(); 5117 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 5118 final boolean atRtl = isAtRtlRun(layout, offset); 5119 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 5120 5121 // We can't determine if the user is expanding or shrinking the selection if they're 5122 // on a bi-di boundary, so until they've moved past the boundary we'll just place 5123 // the cursor at the current position. 5124 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 5125 // We're on a boundary or this is the first direction change -- just update 5126 // to the current position. 5127 mLanguageDirectionChanged = true; 5128 mTouchWordDelta = 0.0f; 5129 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5130 return; 5131 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 5132 // We've just moved past the boundary so update the position. After this we can 5133 // figure out if the user is expanding or shrinking to go by word or character. 5134 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5135 mTouchWordDelta = 0.0f; 5136 mLanguageDirectionChanged = false; 5137 return; 5138 } 5139 5140 boolean isExpanding; 5141 final float xDiff = x - mPrevX; 5142 if (isStartHandle()) { 5143 isExpanding = currLine < mPreviousLineTouched; 5144 } else { 5145 isExpanding = currLine > mPreviousLineTouched; 5146 } 5147 if (atRtl == isStartHandle()) { 5148 isExpanding |= xDiff > 0; 5149 } else { 5150 isExpanding |= xDiff < 0; 5151 } 5152 5153 if (mTextView.getHorizontallyScrolling()) { 5154 if (positionNearEdgeOfScrollingView(x, atRtl) 5155 && ((isStartHandle() && mTextView.getScrollX() != 0) 5156 || (!isStartHandle() 5157 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 5158 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 5159 || (!isStartHandle() && offset > currentOffset))) 5160 || !isExpanding)) { 5161 // If we're expanding ensure that the offset is actually expanding compared to 5162 // the current offset, if the handle snapped to the word, the finger position 5163 // may be out of sync and we don't want the selection to jump back. 5164 mTouchWordDelta = 0.0f; 5165 final int nextOffset = (atRtl == isStartHandle()) 5166 ? layout.getOffsetToRightOf(mPreviousOffset) 5167 : layout.getOffsetToLeftOf(mPreviousOffset); 5168 positionAndAdjustForCrossingHandles(nextOffset, fromTouchScreen); 5169 return; 5170 } 5171 } 5172 5173 if (isExpanding) { 5174 // User is increasing the selection. 5175 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 5176 final boolean snapToWord = (!mInWord 5177 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 5178 && atRtl == isAtRtlRun(layout, wordBoundary); 5179 if (snapToWord) { 5180 // Sometimes words can be broken across lines (Chinese, hyphenation). 5181 // We still snap to the word boundary but we only use the letters on the 5182 // current line to determine if the user is far enough into the word to snap. 5183 if (layout.getLineForOffset(wordBoundary) != currLine) { 5184 wordBoundary = isStartHandle() 5185 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 5186 } 5187 final int offsetThresholdToSnap = isStartHandle() 5188 ? wordEnd - ((wordEnd - wordBoundary) / 2) 5189 : wordStart + ((wordBoundary - wordStart) / 2); 5190 if (isStartHandle() 5191 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 5192 // User is far enough into the word or on a different line so we expand by 5193 // word. 5194 offset = wordStart; 5195 } else if (!isStartHandle() 5196 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 5197 // User is far enough into the word or on a different line so we expand by 5198 // word. 5199 offset = wordEnd; 5200 } else { 5201 offset = mPreviousOffset; 5202 } 5203 } 5204 if ((isStartHandle() && offset < initialOffset) 5205 || (!isStartHandle() && offset > initialOffset)) { 5206 final float adjustedX = getHorizontal(layout, offset); 5207 mTouchWordDelta = 5208 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 5209 } else { 5210 mTouchWordDelta = 0.0f; 5211 } 5212 positionCursor = true; 5213 } else { 5214 final int adjustedOffset = 5215 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 5216 final boolean shrinking = isStartHandle() 5217 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 5218 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 5219 if (shrinking) { 5220 // User is shrinking the selection. 5221 if (currLine != mPrevLine) { 5222 // We're on a different line, so we'll snap to word boundaries. 5223 offset = isStartHandle() ? wordStart : wordEnd; 5224 if ((isStartHandle() && offset < initialOffset) 5225 || (!isStartHandle() && offset > initialOffset)) { 5226 final float adjustedX = getHorizontal(layout, offset); 5227 mTouchWordDelta = 5228 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 5229 } else { 5230 mTouchWordDelta = 0.0f; 5231 } 5232 } else { 5233 offset = adjustedOffset; 5234 } 5235 positionCursor = true; 5236 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 5237 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 5238 // Handle has jumped to the word boundary, and the user is moving 5239 // their finger towards the handle, the delta should be updated. 5240 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 5241 - getHorizontal(layout, mPreviousOffset); 5242 } 5243 } 5244 5245 if (positionCursor) { 5246 mPreviousLineTouched = currLine; 5247 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5248 } 5249 mPrevX = x; 5250 } 5251 5252 @Override 5253 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 5254 boolean fromTouchScreen) { 5255 super.positionAtCursorOffset(offset, forceUpdatePosition, fromTouchScreen); 5256 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 5257 } 5258 5259 @Override 5260 public boolean onTouchEvent(MotionEvent event) { 5261 boolean superResult = super.onTouchEvent(event); 5262 5263 switch (event.getActionMasked()) { 5264 case MotionEvent.ACTION_DOWN: 5265 // Reset the touch word offset and x value when the user 5266 // re-engages the handle. 5267 mTouchWordDelta = 0.0f; 5268 mPrevX = UNSET_X_VALUE; 5269 updateMagnifier(event); 5270 break; 5271 5272 case MotionEvent.ACTION_MOVE: 5273 updateMagnifier(event); 5274 break; 5275 5276 case MotionEvent.ACTION_UP: 5277 case MotionEvent.ACTION_CANCEL: 5278 dismissMagnifier(); 5279 break; 5280 } 5281 5282 return superResult; 5283 } 5284 5285 private void positionAndAdjustForCrossingHandles(int offset, boolean fromTouchScreen) { 5286 final int anotherHandleOffset = 5287 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5288 if ((isStartHandle() && offset >= anotherHandleOffset) 5289 || (!isStartHandle() && offset <= anotherHandleOffset)) { 5290 mTouchWordDelta = 0.0f; 5291 final Layout layout = mTextView.getLayout(); 5292 if (layout != null && offset != anotherHandleOffset) { 5293 final float horiz = getHorizontal(layout, offset); 5294 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 5295 !isStartHandle()); 5296 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 5297 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 5298 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 5299 // This handle passes another one as it crossed a direction boundary. 5300 // Don't minimize the selection, but keep the handle at the run boundary. 5301 final int currentOffset = getCurrentCursorOffset(); 5302 final int offsetToGetRunRange = isStartHandle() 5303 ? currentOffset : Math.max(currentOffset - 1, 0); 5304 final long range = layout.getRunRange(offsetToGetRunRange); 5305 if (isStartHandle()) { 5306 offset = TextUtils.unpackRangeStartFromLong(range); 5307 } else { 5308 offset = TextUtils.unpackRangeEndFromLong(range); 5309 } 5310 positionAtCursorOffset(offset, false, fromTouchScreen); 5311 return; 5312 } 5313 } 5314 // Handles can not cross and selection is at least one character. 5315 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5316 } 5317 positionAtCursorOffset(offset, false, fromTouchScreen); 5318 } 5319 5320 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5321 mTextView.getLocationOnScreen(mTextViewLocation); 5322 boolean nearEdge; 5323 if (atRtl == isStartHandle()) { 5324 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5325 - mTextView.getPaddingRight(); 5326 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5327 } else { 5328 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5329 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5330 } 5331 return nearEdge; 5332 } 5333 5334 @Override 5335 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5336 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5337 return layout.isRtlCharAt(offsetToCheck); 5338 } 5339 5340 @Override 5341 public float getHorizontal(@NonNull Layout layout, int offset) { 5342 return getHorizontal(layout, offset, isStartHandle()); 5343 } 5344 5345 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5346 final int line = layout.getLineForOffset(offset); 5347 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5348 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5349 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5350 return (isRtlChar == isRtlParagraph) 5351 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5352 } 5353 5354 @Override 5355 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5356 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5357 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5358 if (!layout.isLevelBoundary(primaryOffset)) { 5359 return primaryOffset; 5360 } 5361 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5362 final int currentOffset = getCurrentCursorOffset(); 5363 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5364 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5365 if (primaryDiff < secondaryDiff) { 5366 return primaryOffset; 5367 } else if (primaryDiff > secondaryDiff) { 5368 return secondaryOffset; 5369 } else { 5370 final int offsetToCheck = isStartHandle() 5371 ? currentOffset : Math.max(currentOffset - 1, 0); 5372 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5373 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5374 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5375 } 5376 } 5377 5378 @MagnifierHandleTrigger 5379 protected int getMagnifierHandleTrigger() { 5380 return isStartHandle() 5381 ? MagnifierHandleTrigger.SELECTION_START 5382 : MagnifierHandleTrigger.SELECTION_END; 5383 } 5384 } 5385 5386 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5387 final int trueLine = mTextView.getLineAtCoordinate(y); 5388 if (layout == null || prevLine > layout.getLineCount() 5389 || layout.getLineCount() <= 0 || prevLine < 0) { 5390 // Invalid parameters, just return whatever line is at y. 5391 return trueLine; 5392 } 5393 5394 if (Math.abs(trueLine - prevLine) >= 2) { 5395 // Only stick to lines if we're within a line of the previous selection. 5396 return trueLine; 5397 } 5398 5399 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5400 final int lineCount = layout.getLineCount(); 5401 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5402 5403 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5404 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5405 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5406 5407 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5408 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5409 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5410 5411 // Determine if we've moved lines based on y position and previous line. 5412 int currLine; 5413 if (y <= yTopBound) { 5414 currLine = Math.max(prevLine - 1, 0); 5415 } else if (y >= yBottomBound) { 5416 currLine = Math.min(prevLine + 1, lineCount - 1); 5417 } else { 5418 currLine = prevLine; 5419 } 5420 return currLine; 5421 } 5422 5423 /** 5424 * A CursorController instance can be used to control a cursor in the text. 5425 */ 5426 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5427 /** 5428 * Makes the cursor controller visible on screen. 5429 * See also {@link #hide()}. 5430 */ 5431 public void show(); 5432 5433 /** 5434 * Hide the cursor controller from screen. 5435 * See also {@link #show()}. 5436 */ 5437 public void hide(); 5438 5439 /** 5440 * Called when the view is detached from window. Perform house keeping task, such as 5441 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5442 * preventing the activity from being recycled. 5443 */ 5444 public void onDetached(); 5445 5446 public boolean isCursorBeingModified(); 5447 5448 public boolean isActive(); 5449 } 5450 5451 private class InsertionPointCursorController implements CursorController { 5452 private InsertionHandleView mHandle; 5453 5454 public void show() { 5455 getHandle().show(); 5456 5457 if (mSelectionModifierCursorController != null) { 5458 mSelectionModifierCursorController.hide(); 5459 } 5460 } 5461 5462 public void hide() { 5463 if (mHandle != null) { 5464 mHandle.hide(); 5465 } 5466 } 5467 5468 public void onTouchModeChanged(boolean isInTouchMode) { 5469 if (!isInTouchMode) { 5470 hide(); 5471 } 5472 } 5473 5474 private InsertionHandleView getHandle() { 5475 if (mSelectHandleCenter == null) { 5476 mSelectHandleCenter = mTextView.getContext().getDrawable( 5477 mTextView.mTextSelectHandleRes); 5478 } 5479 if (mHandle == null) { 5480 mHandle = new InsertionHandleView(mSelectHandleCenter); 5481 } 5482 return mHandle; 5483 } 5484 5485 @Override 5486 public void onDetached() { 5487 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5488 observer.removeOnTouchModeChangeListener(this); 5489 5490 if (mHandle != null) mHandle.onDetached(); 5491 } 5492 5493 @Override 5494 public boolean isCursorBeingModified() { 5495 return mHandle != null && mHandle.isDragging(); 5496 } 5497 5498 @Override 5499 public boolean isActive() { 5500 return mHandle != null && mHandle.isShowing(); 5501 } 5502 5503 public void invalidateHandle() { 5504 if (mHandle != null) { 5505 mHandle.invalidate(); 5506 } 5507 } 5508 } 5509 5510 class SelectionModifierCursorController implements CursorController { 5511 // The cursor controller handles, lazily created when shown. 5512 private SelectionHandleView mStartHandle; 5513 private SelectionHandleView mEndHandle; 5514 // The offsets of that last touch down event. Remembered to start selection there. 5515 private int mMinTouchOffset, mMaxTouchOffset; 5516 5517 private float mDownPositionX, mDownPositionY; 5518 private boolean mGestureStayedInTapRegion; 5519 5520 // Where the user first starts the drag motion. 5521 private int mStartOffset = -1; 5522 5523 private boolean mHaventMovedEnoughToStartDrag; 5524 // The line that a selection happened most recently with the drag accelerator. 5525 private int mLineSelectionIsOn = -1; 5526 // Whether the drag accelerator has selected past the initial line. 5527 private boolean mSwitchedLines = false; 5528 5529 // Indicates the drag accelerator mode that the user is currently using. 5530 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5531 // Drag accelerator is inactive. 5532 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5533 // Character based selection by dragging. Only for mouse. 5534 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5535 // Word based selection by dragging. Enabled after long pressing or double tapping. 5536 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5537 // Paragraph based selection by dragging. Enabled after mouse triple click. 5538 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5539 5540 SelectionModifierCursorController() { 5541 resetTouchOffsets(); 5542 } 5543 5544 public void show() { 5545 if (mTextView.isInBatchEditMode()) { 5546 return; 5547 } 5548 initDrawables(); 5549 initHandles(); 5550 } 5551 5552 private void initDrawables() { 5553 if (mSelectHandleLeft == null) { 5554 mSelectHandleLeft = mTextView.getContext().getDrawable( 5555 mTextView.mTextSelectHandleLeftRes); 5556 } 5557 if (mSelectHandleRight == null) { 5558 mSelectHandleRight = mTextView.getContext().getDrawable( 5559 mTextView.mTextSelectHandleRightRes); 5560 } 5561 } 5562 5563 private void initHandles() { 5564 // Lazy object creation has to be done before updatePosition() is called. 5565 if (mStartHandle == null) { 5566 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5567 com.android.internal.R.id.selection_start_handle, 5568 HANDLE_TYPE_SELECTION_START); 5569 } 5570 if (mEndHandle == null) { 5571 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5572 com.android.internal.R.id.selection_end_handle, 5573 HANDLE_TYPE_SELECTION_END); 5574 } 5575 5576 mStartHandle.show(); 5577 mEndHandle.show(); 5578 5579 hideInsertionPointCursorController(); 5580 } 5581 5582 public void hide() { 5583 if (mStartHandle != null) mStartHandle.hide(); 5584 if (mEndHandle != null) mEndHandle.hide(); 5585 } 5586 5587 public void enterDrag(int dragAcceleratorMode) { 5588 // Just need to init the handles / hide insertion cursor. 5589 show(); 5590 mDragAcceleratorMode = dragAcceleratorMode; 5591 // Start location of selection. 5592 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5593 mLastDownPositionY); 5594 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5595 // Don't show the handles until user has lifted finger. 5596 hide(); 5597 5598 // This stops scrolling parents from intercepting the touch event, allowing 5599 // the user to continue dragging across the screen to select text; TextView will 5600 // scroll as necessary. 5601 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5602 mTextView.cancelLongPress(); 5603 } 5604 5605 public void onTouchEvent(MotionEvent event) { 5606 // This is done even when the View does not have focus, so that long presses can start 5607 // selection and tap can move cursor from this tap position. 5608 final float eventX = event.getX(); 5609 final float eventY = event.getY(); 5610 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5611 switch (event.getActionMasked()) { 5612 case MotionEvent.ACTION_DOWN: 5613 if (extractedTextModeWillBeStarted()) { 5614 // Prevent duplicating the selection handles until the mode starts. 5615 hide(); 5616 } else { 5617 // Remember finger down position, to be able to start selection from there. 5618 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5619 eventX, eventY); 5620 5621 // Double tap detection 5622 if (mGestureStayedInTapRegion) { 5623 if (mTapState == TAP_STATE_DOUBLE_TAP 5624 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5625 final float deltaX = eventX - mDownPositionX; 5626 final float deltaY = eventY - mDownPositionY; 5627 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5628 5629 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5630 mTextView.getContext()); 5631 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5632 boolean stayedInArea = 5633 distanceSquared < doubleTapSlop * doubleTapSlop; 5634 5635 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5636 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5637 selectCurrentWordAndStartDrag(); 5638 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5639 selectCurrentParagraphAndStartDrag(); 5640 } 5641 mDiscardNextActionUp = true; 5642 } 5643 } 5644 } 5645 5646 mDownPositionX = eventX; 5647 mDownPositionY = eventY; 5648 mGestureStayedInTapRegion = true; 5649 mHaventMovedEnoughToStartDrag = true; 5650 } 5651 break; 5652 5653 case MotionEvent.ACTION_POINTER_DOWN: 5654 case MotionEvent.ACTION_POINTER_UP: 5655 // Handle multi-point gestures. Keep min and max offset positions. 5656 // Only activated for devices that correctly handle multi-touch. 5657 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5658 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5659 updateMinAndMaxOffsets(event); 5660 } 5661 break; 5662 5663 case MotionEvent.ACTION_MOVE: 5664 final ViewConfiguration viewConfig = ViewConfiguration.get( 5665 mTextView.getContext()); 5666 final int touchSlop = viewConfig.getScaledTouchSlop(); 5667 5668 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5669 final float deltaX = eventX - mDownPositionX; 5670 final float deltaY = eventY - mDownPositionY; 5671 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5672 5673 if (mGestureStayedInTapRegion) { 5674 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5675 mGestureStayedInTapRegion = 5676 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5677 } 5678 if (mHaventMovedEnoughToStartDrag) { 5679 // We don't start dragging until the user has moved enough. 5680 mHaventMovedEnoughToStartDrag = 5681 distanceSquared <= touchSlop * touchSlop; 5682 } 5683 } 5684 5685 if (isMouse && !isDragAcceleratorActive()) { 5686 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5687 if (mTextView.hasSelection() 5688 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5689 && offset >= mTextView.getSelectionStart() 5690 && offset <= mTextView.getSelectionEnd()) { 5691 startDragAndDrop(); 5692 break; 5693 } 5694 5695 if (mStartOffset != offset) { 5696 // Start character based drag accelerator. 5697 stopTextActionMode(); 5698 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5699 mDiscardNextActionUp = true; 5700 mHaventMovedEnoughToStartDrag = false; 5701 } 5702 } 5703 5704 if (mStartHandle != null && mStartHandle.isShowing()) { 5705 // Don't do the drag if the handles are showing already. 5706 break; 5707 } 5708 5709 updateSelection(event); 5710 break; 5711 5712 case MotionEvent.ACTION_UP: 5713 if (!isDragAcceleratorActive()) { 5714 break; 5715 } 5716 updateSelection(event); 5717 5718 // No longer dragging to select text, let the parent intercept events. 5719 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5720 5721 // No longer the first dragging motion, reset. 5722 resetDragAcceleratorState(); 5723 5724 if (mTextView.hasSelection()) { 5725 // Drag selection should not be adjusted by the text classifier. 5726 startSelectionActionModeAsync(mHaventMovedEnoughToStartDrag); 5727 } 5728 break; 5729 } 5730 } 5731 5732 private void updateSelection(MotionEvent event) { 5733 if (mTextView.getLayout() != null) { 5734 switch (mDragAcceleratorMode) { 5735 case DRAG_ACCELERATOR_MODE_CHARACTER: 5736 updateCharacterBasedSelection(event); 5737 break; 5738 case DRAG_ACCELERATOR_MODE_WORD: 5739 updateWordBasedSelection(event); 5740 break; 5741 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5742 updateParagraphBasedSelection(event); 5743 break; 5744 } 5745 } 5746 } 5747 5748 /** 5749 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5750 * 5751 * @return true if the drag was started. 5752 */ 5753 private boolean selectCurrentParagraphAndStartDrag() { 5754 if (mInsertionActionModeRunnable != null) { 5755 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5756 } 5757 stopTextActionMode(); 5758 if (!selectCurrentParagraph()) { 5759 return false; 5760 } 5761 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5762 return true; 5763 } 5764 5765 private void updateCharacterBasedSelection(MotionEvent event) { 5766 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5767 updateSelectionInternal(mStartOffset, offset, 5768 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5769 } 5770 5771 private void updateWordBasedSelection(MotionEvent event) { 5772 if (mHaventMovedEnoughToStartDrag) { 5773 return; 5774 } 5775 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5776 final ViewConfiguration viewConfig = ViewConfiguration.get( 5777 mTextView.getContext()); 5778 final float eventX = event.getX(); 5779 final float eventY = event.getY(); 5780 final int currLine; 5781 if (isMouse) { 5782 // No need to offset the y coordinate for mouse input. 5783 currLine = mTextView.getLineAtCoordinate(eventY); 5784 } else { 5785 float y = eventY; 5786 if (mSwitchedLines) { 5787 // Offset the finger by the same vertical offset as the handles. 5788 // This improves visibility of the content being selected by 5789 // shifting the finger below the content, this is applied once 5790 // the user has switched lines. 5791 final int touchSlop = viewConfig.getScaledTouchSlop(); 5792 final float fingerOffset = (mStartHandle != null) 5793 ? mStartHandle.getIdealVerticalOffset() 5794 : touchSlop; 5795 y = eventY - fingerOffset; 5796 } 5797 5798 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5799 y); 5800 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5801 // Break early here, we want to offset the finger position from 5802 // the selection highlight, once the user moved their finger 5803 // to a different line we should apply the offset and *not* switch 5804 // lines until recomputing the position with the finger offset. 5805 mSwitchedLines = true; 5806 return; 5807 } 5808 } 5809 5810 int startOffset; 5811 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5812 // Snap to word boundaries. 5813 if (mStartOffset < offset) { 5814 // Expanding with end handle. 5815 offset = getWordEnd(offset); 5816 startOffset = getWordStart(mStartOffset); 5817 } else { 5818 // Expanding with start handle. 5819 offset = getWordStart(offset); 5820 startOffset = getWordEnd(mStartOffset); 5821 if (startOffset == offset) { 5822 offset = getNextCursorOffset(offset, false); 5823 } 5824 } 5825 mLineSelectionIsOn = currLine; 5826 updateSelectionInternal(startOffset, offset, 5827 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5828 } 5829 5830 private void updateParagraphBasedSelection(MotionEvent event) { 5831 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5832 5833 final int start = Math.min(offset, mStartOffset); 5834 final int end = Math.max(offset, mStartOffset); 5835 final long paragraphsRange = getParagraphsRange(start, end); 5836 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5837 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5838 updateSelectionInternal(selectionStart, selectionEnd, 5839 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5840 } 5841 5842 private void updateSelectionInternal(int selectionStart, int selectionEnd, 5843 boolean fromTouchScreen) { 5844 final boolean performHapticFeedback = fromTouchScreen && mHapticTextHandleEnabled 5845 && ((mTextView.getSelectionStart() != selectionStart) 5846 || (mTextView.getSelectionEnd() != selectionEnd)); 5847 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5848 if (performHapticFeedback) { 5849 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 5850 } 5851 } 5852 5853 /** 5854 * @param event 5855 */ 5856 private void updateMinAndMaxOffsets(MotionEvent event) { 5857 int pointerCount = event.getPointerCount(); 5858 for (int index = 0; index < pointerCount; index++) { 5859 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5860 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5861 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5862 } 5863 } 5864 5865 public int getMinTouchOffset() { 5866 return mMinTouchOffset; 5867 } 5868 5869 public int getMaxTouchOffset() { 5870 return mMaxTouchOffset; 5871 } 5872 5873 public void resetTouchOffsets() { 5874 mMinTouchOffset = mMaxTouchOffset = -1; 5875 resetDragAcceleratorState(); 5876 } 5877 5878 private void resetDragAcceleratorState() { 5879 mStartOffset = -1; 5880 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5881 mSwitchedLines = false; 5882 final int selectionStart = mTextView.getSelectionStart(); 5883 final int selectionEnd = mTextView.getSelectionEnd(); 5884 if (selectionStart > selectionEnd) { 5885 Selection.setSelection((Spannable) mTextView.getText(), 5886 selectionEnd, selectionStart); 5887 } 5888 } 5889 5890 /** 5891 * @return true iff this controller is currently used to move the selection start. 5892 */ 5893 public boolean isSelectionStartDragged() { 5894 return mStartHandle != null && mStartHandle.isDragging(); 5895 } 5896 5897 @Override 5898 public boolean isCursorBeingModified() { 5899 return isDragAcceleratorActive() || isSelectionStartDragged() 5900 || (mEndHandle != null && mEndHandle.isDragging()); 5901 } 5902 5903 /** 5904 * @return true if the user is selecting text using the drag accelerator. 5905 */ 5906 public boolean isDragAcceleratorActive() { 5907 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5908 } 5909 5910 public void onTouchModeChanged(boolean isInTouchMode) { 5911 if (!isInTouchMode) { 5912 hide(); 5913 } 5914 } 5915 5916 @Override 5917 public void onDetached() { 5918 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5919 observer.removeOnTouchModeChangeListener(this); 5920 5921 if (mStartHandle != null) mStartHandle.onDetached(); 5922 if (mEndHandle != null) mEndHandle.onDetached(); 5923 } 5924 5925 @Override 5926 public boolean isActive() { 5927 return mStartHandle != null && mStartHandle.isShowing(); 5928 } 5929 5930 public void invalidateHandles() { 5931 if (mStartHandle != null) { 5932 mStartHandle.invalidate(); 5933 } 5934 if (mEndHandle != null) { 5935 mEndHandle.invalidate(); 5936 } 5937 } 5938 } 5939 5940 private class CorrectionHighlighter { 5941 private final Path mPath = new Path(); 5942 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5943 private int mStart, mEnd; 5944 private long mFadingStartTime; 5945 private RectF mTempRectF; 5946 private static final int FADE_OUT_DURATION = 400; 5947 5948 public CorrectionHighlighter() { 5949 mPaint.setCompatibilityScaling( 5950 mTextView.getResources().getCompatibilityInfo().applicationScale); 5951 mPaint.setStyle(Paint.Style.FILL); 5952 } 5953 5954 public void highlight(CorrectionInfo info) { 5955 mStart = info.getOffset(); 5956 mEnd = mStart + info.getNewText().length(); 5957 mFadingStartTime = SystemClock.uptimeMillis(); 5958 5959 if (mStart < 0 || mEnd < 0) { 5960 stopAnimation(); 5961 } 5962 } 5963 5964 public void draw(Canvas canvas, int cursorOffsetVertical) { 5965 if (updatePath() && updatePaint()) { 5966 if (cursorOffsetVertical != 0) { 5967 canvas.translate(0, cursorOffsetVertical); 5968 } 5969 5970 canvas.drawPath(mPath, mPaint); 5971 5972 if (cursorOffsetVertical != 0) { 5973 canvas.translate(0, -cursorOffsetVertical); 5974 } 5975 invalidate(true); // TODO invalidate cursor region only 5976 } else { 5977 stopAnimation(); 5978 invalidate(false); // TODO invalidate cursor region only 5979 } 5980 } 5981 5982 private boolean updatePaint() { 5983 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5984 if (duration > FADE_OUT_DURATION) return false; 5985 5986 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5987 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5988 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5989 + ((int) (highlightColorAlpha * coef) << 24); 5990 mPaint.setColor(color); 5991 return true; 5992 } 5993 5994 private boolean updatePath() { 5995 final Layout layout = mTextView.getLayout(); 5996 if (layout == null) return false; 5997 5998 // Update in case text is edited while the animation is run 5999 final int length = mTextView.getText().length(); 6000 int start = Math.min(length, mStart); 6001 int end = Math.min(length, mEnd); 6002 6003 mPath.reset(); 6004 layout.getSelectionPath(start, end, mPath); 6005 return true; 6006 } 6007 6008 private void invalidate(boolean delayed) { 6009 if (mTextView.getLayout() == null) return; 6010 6011 if (mTempRectF == null) mTempRectF = new RectF(); 6012 mPath.computeBounds(mTempRectF, false); 6013 6014 int left = mTextView.getCompoundPaddingLeft(); 6015 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 6016 6017 if (delayed) { 6018 mTextView.postInvalidateOnAnimation( 6019 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 6020 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 6021 } else { 6022 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 6023 (int) mTempRectF.right, (int) mTempRectF.bottom); 6024 } 6025 } 6026 6027 private void stopAnimation() { 6028 Editor.this.mCorrectionHighlighter = null; 6029 } 6030 } 6031 6032 private static class ErrorPopup extends PopupWindow { 6033 private boolean mAbove = false; 6034 private final TextView mView; 6035 private int mPopupInlineErrorBackgroundId = 0; 6036 private int mPopupInlineErrorAboveBackgroundId = 0; 6037 6038 ErrorPopup(TextView v, int width, int height) { 6039 super(v, width, height); 6040 mView = v; 6041 // Make sure the TextView has a background set as it will be used the first time it is 6042 // shown and positioned. Initialized with below background, which should have 6043 // dimensions identical to the above version for this to work (and is more likely). 6044 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 6045 com.android.internal.R.styleable.Theme_errorMessageBackground); 6046 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 6047 } 6048 6049 void fixDirection(boolean above) { 6050 mAbove = above; 6051 6052 if (above) { 6053 mPopupInlineErrorAboveBackgroundId = 6054 getResourceId(mPopupInlineErrorAboveBackgroundId, 6055 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 6056 } else { 6057 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 6058 com.android.internal.R.styleable.Theme_errorMessageBackground); 6059 } 6060 6061 mView.setBackgroundResource( 6062 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 6063 } 6064 6065 private int getResourceId(int currentId, int index) { 6066 if (currentId == 0) { 6067 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 6068 R.styleable.Theme); 6069 currentId = styledAttributes.getResourceId(index, 0); 6070 styledAttributes.recycle(); 6071 } 6072 return currentId; 6073 } 6074 6075 @Override 6076 public void update(int x, int y, int w, int h, boolean force) { 6077 super.update(x, y, w, h, force); 6078 6079 boolean above = isAboveAnchor(); 6080 if (above != mAbove) { 6081 fixDirection(above); 6082 } 6083 } 6084 } 6085 6086 static class InputContentType { 6087 int imeOptions = EditorInfo.IME_NULL; 6088 String privateImeOptions; 6089 CharSequence imeActionLabel; 6090 int imeActionId; 6091 Bundle extras; 6092 OnEditorActionListener onEditorActionListener; 6093 boolean enterDown; 6094 LocaleList imeHintLocales; 6095 } 6096 6097 static class InputMethodState { 6098 ExtractedTextRequest mExtractedTextRequest; 6099 final ExtractedText mExtractedText = new ExtractedText(); 6100 int mBatchEditNesting; 6101 boolean mCursorChanged; 6102 boolean mSelectionModeChanged; 6103 boolean mContentChanged; 6104 int mChangedStart, mChangedEnd, mChangedDelta; 6105 } 6106 6107 /** 6108 * @return True iff (start, end) is a valid range within the text. 6109 */ 6110 private static boolean isValidRange(CharSequence text, int start, int end) { 6111 return 0 <= start && start <= end && end <= text.length(); 6112 } 6113 6114 @VisibleForTesting 6115 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 6116 return mSuggestionsPopupWindow; 6117 } 6118 6119 /** 6120 * An InputFilter that monitors text input to maintain undo history. It does not modify the 6121 * text being typed (and hence always returns null from the filter() method). 6122 * 6123 * TODO: Make this span aware. 6124 */ 6125 public static class UndoInputFilter implements InputFilter { 6126 private final Editor mEditor; 6127 6128 // Whether the current filter pass is directly caused by an end-user text edit. 6129 private boolean mIsUserEdit; 6130 6131 // Whether the text field is handling an IME composition. Must be parceled in case the user 6132 // rotates the screen during composition. 6133 private boolean mHasComposition; 6134 6135 // Whether the user is expanding or shortening the text 6136 private boolean mExpanding; 6137 6138 // Whether the previous edit operation was in the current batch edit. 6139 private boolean mPreviousOperationWasInSameBatchEdit; 6140 6141 public UndoInputFilter(Editor editor) { 6142 mEditor = editor; 6143 } 6144 6145 public void saveInstanceState(Parcel parcel) { 6146 parcel.writeInt(mIsUserEdit ? 1 : 0); 6147 parcel.writeInt(mHasComposition ? 1 : 0); 6148 parcel.writeInt(mExpanding ? 1 : 0); 6149 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 6150 } 6151 6152 public void restoreInstanceState(Parcel parcel) { 6153 mIsUserEdit = parcel.readInt() != 0; 6154 mHasComposition = parcel.readInt() != 0; 6155 mExpanding = parcel.readInt() != 0; 6156 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 6157 } 6158 6159 /** 6160 * Signals that a user-triggered edit is starting. 6161 */ 6162 public void beginBatchEdit() { 6163 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 6164 mIsUserEdit = true; 6165 } 6166 6167 public void endBatchEdit() { 6168 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 6169 mIsUserEdit = false; 6170 mPreviousOperationWasInSameBatchEdit = false; 6171 } 6172 6173 @Override 6174 public CharSequence filter(CharSequence source, int start, int end, 6175 Spanned dest, int dstart, int dend) { 6176 if (DEBUG_UNDO) { 6177 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 6178 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 6179 } 6180 6181 // Check to see if this edit should be tracked for undo. 6182 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 6183 return null; 6184 } 6185 6186 final boolean hadComposition = mHasComposition; 6187 mHasComposition = isComposition(source); 6188 final boolean wasExpanding = mExpanding; 6189 boolean shouldCreateSeparateState = false; 6190 if ((end - start) != (dend - dstart)) { 6191 mExpanding = (end - start) > (dend - dstart); 6192 if (hadComposition && mExpanding != wasExpanding) { 6193 shouldCreateSeparateState = true; 6194 } 6195 } 6196 6197 // Handle edit. 6198 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 6199 return null; 6200 } 6201 6202 void freezeLastEdit() { 6203 mEditor.mUndoManager.beginUpdate("Edit text"); 6204 EditOperation lastEdit = getLastEdit(); 6205 if (lastEdit != null) { 6206 lastEdit.mFrozen = true; 6207 } 6208 mEditor.mUndoManager.endUpdate(); 6209 } 6210 6211 @Retention(RetentionPolicy.SOURCE) 6212 @IntDef(prefix = { "MERGE_EDIT_MODE_" }, value = { 6213 MERGE_EDIT_MODE_FORCE_MERGE, 6214 MERGE_EDIT_MODE_NEVER_MERGE, 6215 MERGE_EDIT_MODE_NORMAL 6216 }) 6217 private @interface MergeMode {} 6218 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 6219 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 6220 /** Use {@link EditOperation#mergeWith} to merge */ 6221 private static final int MERGE_EDIT_MODE_NORMAL = 2; 6222 6223 private void handleEdit(CharSequence source, int start, int end, 6224 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 6225 // An application may install a TextWatcher to provide additional modifications after 6226 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 6227 // string). This results in multiple filter() calls for what the user considers to be 6228 // a single operation. Always undo the whole set of changes in one step. 6229 @MergeMode 6230 final int mergeMode; 6231 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 6232 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 6233 } else if (shouldCreateSeparateState) { 6234 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 6235 } else { 6236 mergeMode = MERGE_EDIT_MODE_NORMAL; 6237 } 6238 // Build a new operation with all the information from this edit. 6239 String newText = TextUtils.substring(source, start, end); 6240 String oldText = TextUtils.substring(dest, dstart, dend); 6241 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 6242 mHasComposition); 6243 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 6244 return; 6245 } 6246 recordEdit(edit, mergeMode); 6247 } 6248 6249 private EditOperation getLastEdit() { 6250 final UndoManager um = mEditor.mUndoManager; 6251 return um.getLastOperation( 6252 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 6253 } 6254 /** 6255 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 6256 * If forceMerge is true then the new edit is always merged. 6257 */ 6258 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 6259 // Fetch the last edit operation and attempt to merge in the new edit. 6260 final UndoManager um = mEditor.mUndoManager; 6261 um.beginUpdate("Edit text"); 6262 EditOperation lastEdit = getLastEdit(); 6263 if (lastEdit == null) { 6264 // Add this as the first edit. 6265 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 6266 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6267 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 6268 // Forced merges take priority because they could be the result of a non-user-edit 6269 // change and this case should not create a new undo operation. 6270 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 6271 lastEdit.forceMergeWith(edit); 6272 } else if (!mIsUserEdit) { 6273 // An application directly modified the Editable outside of a text edit. Treat this 6274 // as a new change and don't attempt to merge. 6275 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 6276 um.commitState(mEditor.mUndoOwner); 6277 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6278 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 6279 // Merge succeeded, nothing else to do. 6280 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 6281 } else { 6282 // Could not merge with the last edit, so commit the last edit and add this edit. 6283 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 6284 um.commitState(mEditor.mUndoOwner); 6285 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6286 } 6287 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 6288 um.endUpdate(); 6289 } 6290 6291 private boolean canUndoEdit(CharSequence source, int start, int end, 6292 Spanned dest, int dstart, int dend) { 6293 if (!mEditor.mAllowUndo) { 6294 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 6295 return false; 6296 } 6297 6298 if (mEditor.mUndoManager.isInUndo()) { 6299 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 6300 return false; 6301 } 6302 6303 // Text filters run before input operations are applied. However, some input operations 6304 // are invalid and will throw exceptions when applied. This is common in tests. Don't 6305 // attempt to undo invalid operations. 6306 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 6307 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 6308 return false; 6309 } 6310 6311 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 6312 // on an input field. Skip no-op changes. 6313 if (start == end && dstart == dend) { 6314 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 6315 return false; 6316 } 6317 6318 return true; 6319 } 6320 6321 private static boolean isComposition(CharSequence source) { 6322 if (!(source instanceof Spannable)) { 6323 return false; 6324 } 6325 // This is a composition edit if the source has a non-zero-length composing span. 6326 Spannable text = (Spannable) source; 6327 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6328 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6329 return composeBegin < composeEnd; 6330 } 6331 6332 private boolean isInTextWatcher() { 6333 CharSequence text = mEditor.mTextView.getText(); 6334 return (text instanceof SpannableStringBuilder) 6335 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6336 } 6337 } 6338 6339 /** 6340 * An operation to undo a single "edit" to a text view. 6341 */ 6342 public static class EditOperation extends UndoOperation<Editor> { 6343 private static final int TYPE_INSERT = 0; 6344 private static final int TYPE_DELETE = 1; 6345 private static final int TYPE_REPLACE = 2; 6346 6347 private int mType; 6348 private String mOldText; 6349 private String mNewText; 6350 private int mStart; 6351 6352 private int mOldCursorPos; 6353 private int mNewCursorPos; 6354 private boolean mFrozen; 6355 private boolean mIsComposition; 6356 6357 /** 6358 * Constructs an edit operation from a text input operation on editor that replaces the 6359 * oldText starting at dstart with newText. 6360 */ 6361 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6362 boolean isComposition) { 6363 super(editor.mUndoOwner); 6364 mOldText = oldText; 6365 mNewText = newText; 6366 6367 // Determine the type of the edit. 6368 if (mNewText.length() > 0 && mOldText.length() == 0) { 6369 mType = TYPE_INSERT; 6370 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6371 mType = TYPE_DELETE; 6372 } else { 6373 mType = TYPE_REPLACE; 6374 } 6375 6376 mStart = dstart; 6377 // Store cursor data. 6378 mOldCursorPos = editor.mTextView.getSelectionStart(); 6379 mNewCursorPos = dstart + mNewText.length(); 6380 mIsComposition = isComposition; 6381 } 6382 6383 public EditOperation(Parcel src, ClassLoader loader) { 6384 super(src, loader); 6385 mType = src.readInt(); 6386 mOldText = src.readString(); 6387 mNewText = src.readString(); 6388 mStart = src.readInt(); 6389 mOldCursorPos = src.readInt(); 6390 mNewCursorPos = src.readInt(); 6391 mFrozen = src.readInt() == 1; 6392 mIsComposition = src.readInt() == 1; 6393 } 6394 6395 @Override 6396 public void writeToParcel(Parcel dest, int flags) { 6397 dest.writeInt(mType); 6398 dest.writeString(mOldText); 6399 dest.writeString(mNewText); 6400 dest.writeInt(mStart); 6401 dest.writeInt(mOldCursorPos); 6402 dest.writeInt(mNewCursorPos); 6403 dest.writeInt(mFrozen ? 1 : 0); 6404 dest.writeInt(mIsComposition ? 1 : 0); 6405 } 6406 6407 private int getNewTextEnd() { 6408 return mStart + mNewText.length(); 6409 } 6410 6411 private int getOldTextEnd() { 6412 return mStart + mOldText.length(); 6413 } 6414 6415 @Override 6416 public void commit() { 6417 } 6418 6419 @Override 6420 public void undo() { 6421 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6422 // Remove the new text and insert the old. 6423 Editor editor = getOwnerData(); 6424 Editable text = (Editable) editor.mTextView.getText(); 6425 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6426 } 6427 6428 @Override 6429 public void redo() { 6430 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6431 // Remove the old text and insert the new. 6432 Editor editor = getOwnerData(); 6433 Editable text = (Editable) editor.mTextView.getText(); 6434 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6435 } 6436 6437 /** 6438 * Attempts to merge this existing operation with a new edit. 6439 * @param edit The new edit operation. 6440 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6441 * object unchanged. 6442 */ 6443 private boolean mergeWith(EditOperation edit) { 6444 if (DEBUG_UNDO) { 6445 Log.d(TAG, "mergeWith old " + this); 6446 Log.d(TAG, "mergeWith new " + edit); 6447 } 6448 6449 if (mFrozen) { 6450 return false; 6451 } 6452 6453 switch (mType) { 6454 case TYPE_INSERT: 6455 return mergeInsertWith(edit); 6456 case TYPE_DELETE: 6457 return mergeDeleteWith(edit); 6458 case TYPE_REPLACE: 6459 return mergeReplaceWith(edit); 6460 default: 6461 return false; 6462 } 6463 } 6464 6465 private boolean mergeInsertWith(EditOperation edit) { 6466 if (edit.mType == TYPE_INSERT) { 6467 // Merge insertions that are contiguous even when it's frozen. 6468 if (getNewTextEnd() != edit.mStart) { 6469 return false; 6470 } 6471 mNewText += edit.mNewText; 6472 mNewCursorPos = edit.mNewCursorPos; 6473 mFrozen = edit.mFrozen; 6474 mIsComposition = edit.mIsComposition; 6475 return true; 6476 } 6477 if (mIsComposition && edit.mType == TYPE_REPLACE 6478 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6479 // Merge insertion with replace as they can be single insertion. 6480 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6481 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6482 mNewCursorPos = edit.mNewCursorPos; 6483 mIsComposition = edit.mIsComposition; 6484 return true; 6485 } 6486 return false; 6487 } 6488 6489 // TODO: Support forward delete. 6490 private boolean mergeDeleteWith(EditOperation edit) { 6491 // Only merge continuous deletes. 6492 if (edit.mType != TYPE_DELETE) { 6493 return false; 6494 } 6495 // Only merge deletions that are contiguous. 6496 if (mStart != edit.getOldTextEnd()) { 6497 return false; 6498 } 6499 mStart = edit.mStart; 6500 mOldText = edit.mOldText + mOldText; 6501 mNewCursorPos = edit.mNewCursorPos; 6502 mIsComposition = edit.mIsComposition; 6503 return true; 6504 } 6505 6506 private boolean mergeReplaceWith(EditOperation edit) { 6507 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6508 // Merge with adjacent insert. 6509 mNewText += edit.mNewText; 6510 mNewCursorPos = edit.mNewCursorPos; 6511 return true; 6512 } 6513 if (!mIsComposition) { 6514 return false; 6515 } 6516 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6517 && getNewTextEnd() >= edit.getOldTextEnd()) { 6518 // Merge with delete as they can be single operation. 6519 mNewText = mNewText.substring(0, edit.mStart - mStart) 6520 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6521 if (mNewText.isEmpty()) { 6522 mType = TYPE_DELETE; 6523 } 6524 mNewCursorPos = edit.mNewCursorPos; 6525 mIsComposition = edit.mIsComposition; 6526 return true; 6527 } 6528 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6529 && TextUtils.equals(mNewText, edit.mOldText)) { 6530 // Merge with the replace that replaces the same region. 6531 mNewText = edit.mNewText; 6532 mNewCursorPos = edit.mNewCursorPos; 6533 mIsComposition = edit.mIsComposition; 6534 return true; 6535 } 6536 return false; 6537 } 6538 6539 /** 6540 * Forcibly creates a single merged edit operation by simulating the entire text 6541 * contents being replaced. 6542 */ 6543 public void forceMergeWith(EditOperation edit) { 6544 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6545 if (mergeWith(edit)) { 6546 return; 6547 } 6548 Editor editor = getOwnerData(); 6549 6550 // Copy the text of the current field. 6551 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6552 // but would require two parallel implementations of modifyText() because Editable and 6553 // StringBuilder do not share an interface for replace/delete/insert. 6554 Editable editable = (Editable) editor.mTextView.getText(); 6555 Editable originalText = new SpannableStringBuilder(editable.toString()); 6556 6557 // Roll back the last operation. 6558 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6559 6560 // Clone the text again and apply the new operation. 6561 Editable finalText = new SpannableStringBuilder(editable.toString()); 6562 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6563 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6564 6565 // Convert this operation into a replace operation. 6566 mType = TYPE_REPLACE; 6567 mNewText = finalText.toString(); 6568 mOldText = originalText.toString(); 6569 mStart = 0; 6570 mNewCursorPos = edit.mNewCursorPos; 6571 mIsComposition = edit.mIsComposition; 6572 // mOldCursorPos is unchanged. 6573 } 6574 6575 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6576 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6577 // Apply the edit if it is still valid. 6578 if (isValidRange(text, deleteFrom, deleteTo) 6579 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6580 if (deleteFrom != deleteTo) { 6581 text.delete(deleteFrom, deleteTo); 6582 } 6583 if (newText.length() != 0) { 6584 text.insert(newTextInsertAt, newText); 6585 } 6586 } 6587 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6588 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6589 // TODO: Select all the text that was undone. 6590 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6591 Selection.setSelection(text, newCursorPos); 6592 } 6593 } 6594 6595 private String getTypeString() { 6596 switch (mType) { 6597 case TYPE_INSERT: 6598 return "insert"; 6599 case TYPE_DELETE: 6600 return "delete"; 6601 case TYPE_REPLACE: 6602 return "replace"; 6603 default: 6604 return ""; 6605 } 6606 } 6607 6608 @Override 6609 public String toString() { 6610 return "[mType=" + getTypeString() + ", " 6611 + "mOldText=" + mOldText + ", " 6612 + "mNewText=" + mNewText + ", " 6613 + "mStart=" + mStart + ", " 6614 + "mOldCursorPos=" + mOldCursorPos + ", " 6615 + "mNewCursorPos=" + mNewCursorPos + ", " 6616 + "mFrozen=" + mFrozen + ", " 6617 + "mIsComposition=" + mIsComposition + "]"; 6618 } 6619 6620 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6621 new Parcelable.ClassLoaderCreator<EditOperation>() { 6622 @Override 6623 public EditOperation createFromParcel(Parcel in) { 6624 return new EditOperation(in, null); 6625 } 6626 6627 @Override 6628 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6629 return new EditOperation(in, loader); 6630 } 6631 6632 @Override 6633 public EditOperation[] newArray(int size) { 6634 return new EditOperation[size]; 6635 } 6636 }; 6637 } 6638 6639 /** 6640 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6641 * These allow external applications to plug into currently selected text. 6642 */ 6643 static final class ProcessTextIntentActionsHandler { 6644 6645 private final Editor mEditor; 6646 private final TextView mTextView; 6647 private final Context mContext; 6648 private final PackageManager mPackageManager; 6649 private final String mPackageName; 6650 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6651 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6652 new SparseArray<>(); 6653 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6654 6655 private ProcessTextIntentActionsHandler(Editor editor) { 6656 mEditor = Preconditions.checkNotNull(editor); 6657 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6658 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6659 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6660 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6661 } 6662 6663 /** 6664 * Adds "PROCESS_TEXT" menu items to the specified menu. 6665 */ 6666 public void onInitializeMenu(Menu menu) { 6667 loadSupportedActivities(); 6668 final int size = mSupportedActivities.size(); 6669 for (int i = 0; i < size; i++) { 6670 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6671 menu.add(Menu.NONE, Menu.NONE, 6672 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i, 6673 getLabel(resolveInfo)) 6674 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6675 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 6676 } 6677 } 6678 6679 /** 6680 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6681 * menu item. 6682 * 6683 * @return True if the action was performed, false otherwise. 6684 */ 6685 public boolean performMenuItemAction(MenuItem item) { 6686 return fireIntent(item.getIntent()); 6687 } 6688 6689 /** 6690 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6691 */ 6692 public void initializeAccessibilityActions() { 6693 mAccessibilityIntents.clear(); 6694 mAccessibilityActions.clear(); 6695 int i = 0; 6696 loadSupportedActivities(); 6697 for (ResolveInfo resolveInfo : mSupportedActivities) { 6698 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6699 mAccessibilityActions.put( 6700 actionId, 6701 new AccessibilityNodeInfo.AccessibilityAction( 6702 actionId, getLabel(resolveInfo))); 6703 mAccessibilityIntents.put( 6704 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6705 } 6706 } 6707 6708 /** 6709 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6710 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6711 * latest accessibility actions available for this call. 6712 */ 6713 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6714 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6715 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6716 } 6717 } 6718 6719 /** 6720 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6721 * accessibility action id. 6722 * 6723 * @return True if the action was performed, false otherwise. 6724 */ 6725 public boolean performAccessibilityAction(int actionId) { 6726 return fireIntent(mAccessibilityIntents.get(actionId)); 6727 } 6728 6729 private boolean fireIntent(Intent intent) { 6730 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6731 String selectedText = mTextView.getSelectedText(); 6732 selectedText = TextUtils.trimToParcelableSize(selectedText); 6733 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, selectedText); 6734 mEditor.mPreserveSelection = true; 6735 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6736 return true; 6737 } 6738 return false; 6739 } 6740 6741 private void loadSupportedActivities() { 6742 mSupportedActivities.clear(); 6743 if (!mContext.canStartActivityForResult()) { 6744 return; 6745 } 6746 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6747 List<ResolveInfo> unfiltered = 6748 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6749 for (ResolveInfo info : unfiltered) { 6750 if (isSupportedActivity(info)) { 6751 mSupportedActivities.add(info); 6752 } 6753 } 6754 } 6755 6756 private boolean isSupportedActivity(ResolveInfo info) { 6757 return mPackageName.equals(info.activityInfo.packageName) 6758 || info.activityInfo.exported 6759 && (info.activityInfo.permission == null 6760 || mContext.checkSelfPermission(info.activityInfo.permission) 6761 == PackageManager.PERMISSION_GRANTED); 6762 } 6763 6764 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6765 return createProcessTextIntent() 6766 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6767 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6768 } 6769 6770 private Intent createProcessTextIntent() { 6771 return new Intent() 6772 .setAction(Intent.ACTION_PROCESS_TEXT) 6773 .setType("text/plain"); 6774 } 6775 6776 private CharSequence getLabel(ResolveInfo resolveInfo) { 6777 return resolveInfo.loadLabel(mPackageManager); 6778 } 6779 } 6780} 6781