Editor.java revision 1eb19a3b87836af92fc989c1afa56ad4febd716b
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.Rect; 41import android.graphics.RectF; 42import android.graphics.drawable.ColorDrawable; 43import android.graphics.drawable.Drawable; 44import android.metrics.LogMaker; 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.widget.AdapterView.OnItemClickListener; 112import android.widget.TextView.Drawables; 113import android.widget.TextView.OnEditorActionListener; 114 115import com.android.internal.annotations.VisibleForTesting; 116import com.android.internal.logging.MetricsLogger; 117import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 118import com.android.internal.util.ArrayUtils; 119import com.android.internal.util.GrowingArrayUtils; 120import com.android.internal.util.Preconditions; 121import com.android.internal.widget.EditableInputConnection; 122import com.android.internal.widget.Magnifier; 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; 132 133 134/** 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_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 167 168 private static final float MAGNIFIER_ZOOM = 1.25f; 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 // Each Editor manages its own undo stack. 180 private final UndoManager mUndoManager = new UndoManager(); 181 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 182 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 183 boolean mAllowUndo = true; 184 185 private final MetricsLogger mMetricsLogger = new MetricsLogger(); 186 187 // Cursor Controllers. 188 private InsertionPointCursorController mInsertionPointCursorController; 189 SelectionModifierCursorController mSelectionModifierCursorController; 190 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 191 private ActionMode mTextActionMode; 192 private boolean mInsertionControllerEnabled; 193 private boolean mSelectionControllerEnabled; 194 195 private final boolean mHapticTextHandleEnabled; 196 197 private final Magnifier mMagnifier; 198 199 // Used to highlight a word when it is corrected by the IME 200 private CorrectionHighlighter mCorrectionHighlighter; 201 202 InputContentType mInputContentType; 203 InputMethodState mInputMethodState; 204 205 private static class TextRenderNode { 206 // Render node has 3 recording states: 207 // 1. Recorded operations are valid. 208 // #needsRecord() returns false, but needsToBeShifted is false. 209 // 2. Recorded operations are not valid, but just the position needed to be updated. 210 // #needsRecord() returns false, but needsToBeShifted is true. 211 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 212 // true. 213 RenderNode renderNode; 214 boolean isDirty; 215 // Becomes true when recorded operations can be reused, but the position has to be updated. 216 boolean needsToBeShifted; 217 public TextRenderNode(String name) { 218 renderNode = RenderNode.create(name, null); 219 isDirty = true; 220 needsToBeShifted = true; 221 } 222 boolean needsRecord() { 223 return isDirty || !renderNode.isValid(); 224 } 225 } 226 private TextRenderNode[] mTextRenderNodes; 227 228 boolean mFrozenWithFocus; 229 boolean mSelectionMoved; 230 boolean mTouchFocusSelected; 231 232 KeyListener mKeyListener; 233 int mInputType = EditorInfo.TYPE_NULL; 234 235 boolean mDiscardNextActionUp; 236 boolean mIgnoreActionUpEvent; 237 238 long mShowCursor; 239 private Blink mBlink; 240 241 boolean mCursorVisible = true; 242 boolean mSelectAllOnFocus; 243 boolean mTextIsSelectable; 244 245 CharSequence mError; 246 boolean mErrorWasChanged; 247 private ErrorPopup mErrorPopup; 248 249 /** 250 * This flag is set if the TextView tries to display an error before it 251 * is attached to the window (so its position is still unknown). 252 * It causes the error to be shown later, when onAttachedToWindow() 253 * is called. 254 */ 255 private boolean mShowErrorAfterAttach; 256 257 boolean mInBatchEditControllers; 258 boolean mShowSoftInputOnFocus = true; 259 private boolean mPreserveSelection; 260 private boolean mRestartActionModeOnNextRefresh; 261 262 private SelectionActionModeHelper mSelectionActionModeHelper; 263 264 boolean mIsBeingLongClicked; 265 266 private SuggestionsPopupWindow mSuggestionsPopupWindow; 267 SuggestionRangeSpan mSuggestionRangeSpan; 268 private Runnable mShowSuggestionRunnable; 269 270 Drawable mDrawableForCursor = null; 271 272 private Drawable mSelectHandleLeft; 273 private Drawable mSelectHandleRight; 274 private Drawable mSelectHandleCenter; 275 276 // Global listener that detects changes in the global position of the TextView 277 private PositionListener mPositionListener; 278 279 private float mLastDownPositionX, mLastDownPositionY; 280 private float mLastUpPositionX, mLastUpPositionY; 281 private float mContextMenuAnchorX, mContextMenuAnchorY; 282 Callback mCustomSelectionActionModeCallback; 283 Callback mCustomInsertionActionModeCallback; 284 285 // Set when this TextView gained focus with some text selected. Will start selection mode. 286 boolean mCreatedWithASelection; 287 288 // Indicates the current tap state (first tap, double tap, or triple click). 289 private int mTapState = TAP_STATE_INITIAL; 290 private long mLastTouchUpTime = 0; 291 private static final int TAP_STATE_INITIAL = 0; 292 private static final int TAP_STATE_FIRST_TAP = 1; 293 private static final int TAP_STATE_DOUBLE_TAP = 2; 294 // Only for mouse input. 295 private static final int TAP_STATE_TRIPLE_CLICK = 3; 296 297 // The button state as of the last time #onTouchEvent is called. 298 private int mLastButtonState; 299 300 private Runnable mInsertionActionModeRunnable; 301 302 // The span controller helps monitoring the changes to which the Editor needs to react: 303 // - EasyEditSpans, for which we have some UI to display on attach and on hide 304 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 305 private SpanController mSpanController; 306 307 private WordIterator mWordIterator; 308 SpellChecker mSpellChecker; 309 310 // This word iterator is set with text and used to determine word boundaries 311 // when a user is selecting text. 312 private WordIterator mWordIteratorWithText; 313 // Indicate that the text in the word iterator needs to be updated. 314 private boolean mUpdateWordIteratorText; 315 316 private Rect mTempRect; 317 318 private final TextView mTextView; 319 320 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 321 322 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 323 new CursorAnchorInfoNotifier(); 324 325 private final Runnable mShowFloatingToolbar = new Runnable() { 326 @Override 327 public void run() { 328 if (mTextActionMode != null) { 329 mTextActionMode.hide(0); // hide off. 330 } 331 } 332 }; 333 334 boolean mIsInsertionActionModeStartPending = false; 335 336 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 337 338 Editor(TextView textView) { 339 mTextView = textView; 340 // Synchronize the filter list, which places the undo input filter at the end. 341 mTextView.setFilters(mTextView.getFilters()); 342 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 343 mHapticTextHandleEnabled = mTextView.getContext().getResources().getBoolean( 344 com.android.internal.R.bool.config_enableHapticTextHandle); 345 346 mMagnifier = FLAG_USE_MAGNIFIER ? new Magnifier(mTextView) : null; 347 } 348 349 ParcelableParcel saveInstanceState() { 350 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 351 Parcel parcel = state.getParcel(); 352 mUndoManager.saveInstanceState(parcel); 353 mUndoInputFilter.saveInstanceState(parcel); 354 return state; 355 } 356 357 void restoreInstanceState(ParcelableParcel state) { 358 Parcel parcel = state.getParcel(); 359 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 360 mUndoInputFilter.restoreInstanceState(parcel); 361 // Re-associate this object as the owner of undo state. 362 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 363 } 364 365 /** 366 * Forgets all undo and redo operations for this Editor. 367 */ 368 void forgetUndoRedo() { 369 UndoOwner[] owners = { mUndoOwner }; 370 mUndoManager.forgetUndos(owners, -1 /* all */); 371 mUndoManager.forgetRedos(owners, -1 /* all */); 372 } 373 374 boolean canUndo() { 375 UndoOwner[] owners = { mUndoOwner }; 376 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 377 } 378 379 boolean canRedo() { 380 UndoOwner[] owners = { mUndoOwner }; 381 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 382 } 383 384 void undo() { 385 if (!mAllowUndo) { 386 return; 387 } 388 UndoOwner[] owners = { mUndoOwner }; 389 mUndoManager.undo(owners, 1); // Undo 1 action. 390 } 391 392 void redo() { 393 if (!mAllowUndo) { 394 return; 395 } 396 UndoOwner[] owners = { mUndoOwner }; 397 mUndoManager.redo(owners, 1); // Redo 1 action. 398 } 399 400 void replace() { 401 if (mSuggestionsPopupWindow == null) { 402 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 403 } 404 hideCursorAndSpanControllers(); 405 mSuggestionsPopupWindow.show(); 406 407 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 408 Selection.setSelection((Spannable) mTextView.getText(), middle); 409 } 410 411 void onAttachedToWindow() { 412 if (mShowErrorAfterAttach) { 413 showError(); 414 mShowErrorAfterAttach = false; 415 } 416 417 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 418 // No need to create the controller. 419 // The get method will add the listener on controller creation. 420 if (mInsertionPointCursorController != null) { 421 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 422 } 423 if (mSelectionModifierCursorController != null) { 424 mSelectionModifierCursorController.resetTouchOffsets(); 425 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 426 } 427 updateSpellCheckSpans(0, mTextView.getText().length(), 428 true /* create the spell checker if needed */); 429 430 if (mTextView.hasSelection()) { 431 refreshTextActionMode(); 432 } 433 434 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 435 resumeBlink(); 436 } 437 438 void onDetachedFromWindow() { 439 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 440 441 if (mError != null) { 442 hideError(); 443 } 444 445 suspendBlink(); 446 447 if (mInsertionPointCursorController != null) { 448 mInsertionPointCursorController.onDetached(); 449 } 450 451 if (mSelectionModifierCursorController != null) { 452 mSelectionModifierCursorController.onDetached(); 453 } 454 455 if (mShowSuggestionRunnable != null) { 456 mTextView.removeCallbacks(mShowSuggestionRunnable); 457 } 458 459 // Cancel the single tap delayed runnable. 460 if (mInsertionActionModeRunnable != null) { 461 mTextView.removeCallbacks(mInsertionActionModeRunnable); 462 } 463 464 mTextView.removeCallbacks(mShowFloatingToolbar); 465 466 discardTextDisplayLists(); 467 468 if (mSpellChecker != null) { 469 mSpellChecker.closeSession(); 470 // Forces the creation of a new SpellChecker next time this window is created. 471 // Will handle the cases where the settings has been changed in the meantime. 472 mSpellChecker = null; 473 } 474 475 hideCursorAndSpanControllers(); 476 stopTextActionModeWithPreservingSelection(); 477 } 478 479 private void discardTextDisplayLists() { 480 if (mTextRenderNodes != null) { 481 for (int i = 0; i < mTextRenderNodes.length; i++) { 482 RenderNode displayList = mTextRenderNodes[i] != null 483 ? mTextRenderNodes[i].renderNode : null; 484 if (displayList != null && displayList.isValid()) { 485 displayList.discardDisplayList(); 486 } 487 } 488 } 489 } 490 491 private void showError() { 492 if (mTextView.getWindowToken() == null) { 493 mShowErrorAfterAttach = true; 494 return; 495 } 496 497 if (mErrorPopup == null) { 498 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 499 final TextView err = (TextView) inflater.inflate( 500 com.android.internal.R.layout.textview_hint, null); 501 502 final float scale = mTextView.getResources().getDisplayMetrics().density; 503 mErrorPopup = 504 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 505 mErrorPopup.setFocusable(false); 506 // The user is entering text, so the input method is needed. We 507 // don't want the popup to be displayed on top of it. 508 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 509 } 510 511 TextView tv = (TextView) mErrorPopup.getContentView(); 512 chooseSize(mErrorPopup, mError, tv); 513 tv.setText(mError); 514 515 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 516 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 517 } 518 519 public void setError(CharSequence error, Drawable icon) { 520 mError = TextUtils.stringOrSpannedString(error); 521 mErrorWasChanged = true; 522 523 if (mError == null) { 524 setErrorIcon(null); 525 if (mErrorPopup != null) { 526 if (mErrorPopup.isShowing()) { 527 mErrorPopup.dismiss(); 528 } 529 530 mErrorPopup = null; 531 } 532 mShowErrorAfterAttach = false; 533 } else { 534 setErrorIcon(icon); 535 if (mTextView.isFocused()) { 536 showError(); 537 } 538 } 539 } 540 541 private void setErrorIcon(Drawable icon) { 542 Drawables dr = mTextView.mDrawables; 543 if (dr == null) { 544 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 545 } 546 dr.setErrorDrawable(icon, mTextView); 547 548 mTextView.resetResolvedDrawables(); 549 mTextView.invalidate(); 550 mTextView.requestLayout(); 551 } 552 553 private void hideError() { 554 if (mErrorPopup != null) { 555 if (mErrorPopup.isShowing()) { 556 mErrorPopup.dismiss(); 557 } 558 } 559 560 mShowErrorAfterAttach = false; 561 } 562 563 /** 564 * Returns the X offset to make the pointy top of the error point 565 * at the middle of the error icon. 566 */ 567 private int getErrorX() { 568 /* 569 * The "25" is the distance between the point and the right edge 570 * of the background 571 */ 572 final float scale = mTextView.getResources().getDisplayMetrics().density; 573 574 final Drawables dr = mTextView.mDrawables; 575 576 final int layoutDirection = mTextView.getLayoutDirection(); 577 int errorX; 578 int offset; 579 switch (layoutDirection) { 580 default: 581 case View.LAYOUT_DIRECTION_LTR: 582 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 583 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 584 - mTextView.getPaddingRight() + offset; 585 break; 586 case View.LAYOUT_DIRECTION_RTL: 587 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 588 errorX = mTextView.getPaddingLeft() + offset; 589 break; 590 } 591 return errorX; 592 } 593 594 /** 595 * Returns the Y offset to make the pointy top of the error point 596 * at the bottom of the error icon. 597 */ 598 private int getErrorY() { 599 /* 600 * Compound, not extended, because the icon is not clipped 601 * if the text height is smaller. 602 */ 603 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 604 int vspace = mTextView.getBottom() - mTextView.getTop() 605 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 606 607 final Drawables dr = mTextView.mDrawables; 608 609 final int layoutDirection = mTextView.getLayoutDirection(); 610 int height; 611 switch (layoutDirection) { 612 default: 613 case View.LAYOUT_DIRECTION_LTR: 614 height = (dr != null ? dr.mDrawableHeightRight : 0); 615 break; 616 case View.LAYOUT_DIRECTION_RTL: 617 height = (dr != null ? dr.mDrawableHeightLeft : 0); 618 break; 619 } 620 621 int icontop = compoundPaddingTop + (vspace - height) / 2; 622 623 /* 624 * The "2" is the distance between the point and the top edge 625 * of the background. 626 */ 627 final float scale = mTextView.getResources().getDisplayMetrics().density; 628 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 629 } 630 631 void createInputContentTypeIfNeeded() { 632 if (mInputContentType == null) { 633 mInputContentType = new InputContentType(); 634 } 635 } 636 637 void createInputMethodStateIfNeeded() { 638 if (mInputMethodState == null) { 639 mInputMethodState = new InputMethodState(); 640 } 641 } 642 643 boolean isCursorVisible() { 644 // The default value is true, even when there is no associated Editor 645 return mCursorVisible && mTextView.isTextEditable(); 646 } 647 648 void prepareCursorControllers() { 649 boolean windowSupportsHandles = false; 650 651 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 652 if (params instanceof WindowManager.LayoutParams) { 653 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 654 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 655 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 656 } 657 658 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 659 mInsertionControllerEnabled = enabled && isCursorVisible(); 660 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 661 662 if (!mInsertionControllerEnabled) { 663 hideInsertionPointCursorController(); 664 if (mInsertionPointCursorController != null) { 665 mInsertionPointCursorController.onDetached(); 666 mInsertionPointCursorController = null; 667 } 668 } 669 670 if (!mSelectionControllerEnabled) { 671 stopTextActionMode(); 672 if (mSelectionModifierCursorController != null) { 673 mSelectionModifierCursorController.onDetached(); 674 mSelectionModifierCursorController = null; 675 } 676 } 677 } 678 679 void hideInsertionPointCursorController() { 680 if (mInsertionPointCursorController != null) { 681 mInsertionPointCursorController.hide(); 682 } 683 } 684 685 /** 686 * Hides the insertion and span controllers. 687 */ 688 void hideCursorAndSpanControllers() { 689 hideCursorControllers(); 690 hideSpanControllers(); 691 } 692 693 private void hideSpanControllers() { 694 if (mSpanController != null) { 695 mSpanController.hide(); 696 } 697 } 698 699 private void hideCursorControllers() { 700 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 701 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 702 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 703 // to distinguish one from the other. 704 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 705 || !mSuggestionsPopupWindow.isShowingUp())) { 706 // Should be done before hide insertion point controller since it triggers a show of it 707 mSuggestionsPopupWindow.hide(); 708 } 709 hideInsertionPointCursorController(); 710 } 711 712 /** 713 * Create new SpellCheckSpans on the modified region. 714 */ 715 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 716 // Remove spans whose adjacent characters are text not punctuation 717 mTextView.removeAdjacentSuggestionSpans(start); 718 mTextView.removeAdjacentSuggestionSpans(end); 719 720 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 721 && !(mTextView.isInExtractedMode())) { 722 if (mSpellChecker == null && createSpellChecker) { 723 mSpellChecker = new SpellChecker(mTextView); 724 } 725 if (mSpellChecker != null) { 726 mSpellChecker.spellCheck(start, end); 727 } 728 } 729 } 730 731 void onScreenStateChanged(int screenState) { 732 switch (screenState) { 733 case View.SCREEN_STATE_ON: 734 resumeBlink(); 735 break; 736 case View.SCREEN_STATE_OFF: 737 suspendBlink(); 738 break; 739 } 740 } 741 742 private void suspendBlink() { 743 if (mBlink != null) { 744 mBlink.cancel(); 745 } 746 } 747 748 private void resumeBlink() { 749 if (mBlink != null) { 750 mBlink.uncancel(); 751 makeBlink(); 752 } 753 } 754 755 void adjustInputType(boolean password, boolean passwordInputType, 756 boolean webPasswordInputType, boolean numberPasswordInputType) { 757 // mInputType has been set from inputType, possibly modified by mInputMethod. 758 // Specialize mInputType to [web]password if we have a text class and the original input 759 // type was a password. 760 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 761 if (password || passwordInputType) { 762 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 763 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 764 } 765 if (webPasswordInputType) { 766 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 767 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 768 } 769 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 770 if (numberPasswordInputType) { 771 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 772 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 773 } 774 } 775 } 776 777 private void chooseSize(@NonNull PopupWindow pop, @NonNull CharSequence text, 778 @NonNull TextView tv) { 779 final int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 780 final int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 781 782 final int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 783 com.android.internal.R.dimen.textview_error_popup_default_width); 784 final StaticLayout l = StaticLayout.Builder.obtain(text, 0, text.length(), tv.getPaint(), 785 defaultWidthInPixels) 786 .setUseLineSpacingFromFallbacks(tv.mUseFallbackLineSpacing) 787 .build(); 788 789 float max = 0; 790 for (int i = 0; i < l.getLineCount(); i++) { 791 max = Math.max(max, l.getLineWidth(i)); 792 } 793 794 /* 795 * Now set the popup size to be big enough for the text plus the border capped 796 * to DEFAULT_MAX_POPUP_WIDTH 797 */ 798 pop.setWidth(wid + (int) Math.ceil(max)); 799 pop.setHeight(ht + l.getHeight()); 800 } 801 802 void setFrame() { 803 if (mErrorPopup != null) { 804 TextView tv = (TextView) mErrorPopup.getContentView(); 805 chooseSize(mErrorPopup, mError, tv); 806 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 807 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 808 } 809 } 810 811 private int getWordStart(int offset) { 812 // FIXME - For this and similar methods we're not doing anything to check if there's 813 // a LocaleSpan in the text, this may be something we should try handling or checking for. 814 int retOffset = getWordIteratorWithText().prevBoundary(offset); 815 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 816 // On punctuation boundary or within group of punctuation, find punctuation start. 817 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 818 } else { 819 // Not on a punctuation boundary, find the word start. 820 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 821 } 822 if (retOffset == BreakIterator.DONE) { 823 return offset; 824 } 825 return retOffset; 826 } 827 828 private int getWordEnd(int offset) { 829 int retOffset = getWordIteratorWithText().nextBoundary(offset); 830 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 831 // On punctuation boundary or within group of punctuation, find punctuation end. 832 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 833 } else { 834 // Not on a punctuation boundary, find the word end. 835 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 836 } 837 if (retOffset == BreakIterator.DONE) { 838 return offset; 839 } 840 return retOffset; 841 } 842 843 private boolean needsToSelectAllToSelectWordOrParagraph() { 844 if (mTextView.hasPasswordTransformationMethod()) { 845 // Always select all on a password field. 846 // Cut/copy menu entries are not available for passwords, but being able to select all 847 // is however useful to delete or paste to replace the entire content. 848 return true; 849 } 850 851 int inputType = mTextView.getInputType(); 852 int klass = inputType & InputType.TYPE_MASK_CLASS; 853 int variation = inputType & InputType.TYPE_MASK_VARIATION; 854 855 // Specific text field types: select the entire text for these 856 if (klass == InputType.TYPE_CLASS_NUMBER 857 || klass == InputType.TYPE_CLASS_PHONE 858 || klass == InputType.TYPE_CLASS_DATETIME 859 || variation == InputType.TYPE_TEXT_VARIATION_URI 860 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 861 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 862 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 863 return true; 864 } 865 return false; 866 } 867 868 /** 869 * Adjusts selection to the word under last touch offset. Return true if the operation was 870 * successfully performed. 871 */ 872 boolean selectCurrentWord() { 873 if (!mTextView.canSelectText()) { 874 return false; 875 } 876 877 if (needsToSelectAllToSelectWordOrParagraph()) { 878 return mTextView.selectAllText(); 879 } 880 881 long lastTouchOffsets = getLastTouchOffsets(); 882 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 883 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 884 885 // Safety check in case standard touch event handling has been bypassed 886 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 887 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 888 889 int selectionStart, selectionEnd; 890 891 // If a URLSpan (web address, email, phone...) is found at that position, select it. 892 URLSpan[] urlSpans = 893 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 894 if (urlSpans.length >= 1) { 895 URLSpan urlSpan = urlSpans[0]; 896 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 897 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 898 } else { 899 // FIXME - We should check if there's a LocaleSpan in the text, this may be 900 // something we should try handling or checking for. 901 final WordIterator wordIterator = getWordIterator(); 902 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 903 904 selectionStart = wordIterator.getBeginning(minOffset); 905 selectionEnd = wordIterator.getEnd(maxOffset); 906 907 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 908 || selectionStart == selectionEnd) { 909 // Possible when the word iterator does not properly handle the text's language 910 long range = getCharClusterRange(minOffset); 911 selectionStart = TextUtils.unpackRangeStartFromLong(range); 912 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 913 } 914 } 915 916 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 917 return selectionEnd > selectionStart; 918 } 919 920 /** 921 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 922 * successfully performed. 923 */ 924 private boolean selectCurrentParagraph() { 925 if (!mTextView.canSelectText()) { 926 return false; 927 } 928 929 if (needsToSelectAllToSelectWordOrParagraph()) { 930 return mTextView.selectAllText(); 931 } 932 933 long lastTouchOffsets = getLastTouchOffsets(); 934 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 935 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 936 937 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 938 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 939 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 940 if (start < end) { 941 Selection.setSelection((Spannable) mTextView.getText(), start, end); 942 return true; 943 } 944 return false; 945 } 946 947 /** 948 * Get the minimum range of paragraphs that contains startOffset and endOffset. 949 */ 950 private long getParagraphsRange(int startOffset, int endOffset) { 951 final Layout layout = mTextView.getLayout(); 952 if (layout == null) { 953 return TextUtils.packRangeInLong(-1, -1); 954 } 955 final CharSequence text = mTextView.getText(); 956 int minLine = layout.getLineForOffset(startOffset); 957 // Search paragraph start. 958 while (minLine > 0) { 959 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 960 if (text.charAt(prevLineEndOffset - 1) == '\n') { 961 break; 962 } 963 minLine--; 964 } 965 int maxLine = layout.getLineForOffset(endOffset); 966 // Search paragraph end. 967 while (maxLine < layout.getLineCount() - 1) { 968 final int lineEndOffset = layout.getLineEnd(maxLine); 969 if (text.charAt(lineEndOffset - 1) == '\n') { 970 break; 971 } 972 maxLine++; 973 } 974 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 975 } 976 977 void onLocaleChanged() { 978 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 979 // proper new locale 980 mWordIterator = null; 981 mWordIteratorWithText = null; 982 } 983 984 public WordIterator getWordIterator() { 985 if (mWordIterator == null) { 986 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 987 } 988 return mWordIterator; 989 } 990 991 private WordIterator getWordIteratorWithText() { 992 if (mWordIteratorWithText == null) { 993 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 994 mUpdateWordIteratorText = true; 995 } 996 if (mUpdateWordIteratorText) { 997 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 998 // to the user's selection is needed. A possible solution would be to 999 // copy some number N of characters near the selection and then when the 1000 // user approaches N then we'd do another copy of the next N characters. 1001 CharSequence text = mTextView.getText(); 1002 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 1003 mUpdateWordIteratorText = false; 1004 } 1005 return mWordIteratorWithText; 1006 } 1007 1008 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 1009 final Layout layout = mTextView.getLayout(); 1010 if (layout == null) return offset; 1011 return findAfterGivenOffset == layout.isRtlCharAt(offset) 1012 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 1013 } 1014 1015 private long getCharClusterRange(int offset) { 1016 final int textLength = mTextView.getText().length(); 1017 if (offset < textLength) { 1018 final int clusterEndOffset = getNextCursorOffset(offset, true); 1019 return TextUtils.packRangeInLong( 1020 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 1021 } 1022 if (offset - 1 >= 0) { 1023 final int clusterStartOffset = getNextCursorOffset(offset, false); 1024 return TextUtils.packRangeInLong(clusterStartOffset, 1025 getNextCursorOffset(clusterStartOffset, true)); 1026 } 1027 return TextUtils.packRangeInLong(offset, offset); 1028 } 1029 1030 private boolean touchPositionIsInSelection() { 1031 int selectionStart = mTextView.getSelectionStart(); 1032 int selectionEnd = mTextView.getSelectionEnd(); 1033 1034 if (selectionStart == selectionEnd) { 1035 return false; 1036 } 1037 1038 if (selectionStart > selectionEnd) { 1039 int tmp = selectionStart; 1040 selectionStart = selectionEnd; 1041 selectionEnd = tmp; 1042 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1043 } 1044 1045 SelectionModifierCursorController selectionController = getSelectionController(); 1046 int minOffset = selectionController.getMinTouchOffset(); 1047 int maxOffset = selectionController.getMaxTouchOffset(); 1048 1049 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1050 } 1051 1052 private PositionListener getPositionListener() { 1053 if (mPositionListener == null) { 1054 mPositionListener = new PositionListener(); 1055 } 1056 return mPositionListener; 1057 } 1058 1059 private interface TextViewPositionListener { 1060 public void updatePosition(int parentPositionX, int parentPositionY, 1061 boolean parentPositionChanged, boolean parentScrolled); 1062 } 1063 1064 private boolean isOffsetVisible(int offset) { 1065 Layout layout = mTextView.getLayout(); 1066 if (layout == null) return false; 1067 1068 final int line = layout.getLineForOffset(offset); 1069 final int lineBottom = layout.getLineBottom(line); 1070 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1071 return mTextView.isPositionVisible( 1072 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1073 lineBottom + mTextView.viewportToContentVerticalOffset()); 1074 } 1075 1076 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1077 * in the view. Returns false when the position is in the empty space of left/right of text. 1078 */ 1079 private boolean isPositionOnText(float x, float y) { 1080 Layout layout = mTextView.getLayout(); 1081 if (layout == null) return false; 1082 1083 final int line = mTextView.getLineAtCoordinate(y); 1084 x = mTextView.convertToLocalHorizontalCoordinate(x); 1085 1086 if (x < layout.getLineLeft(line)) return false; 1087 if (x > layout.getLineRight(line)) return false; 1088 return true; 1089 } 1090 1091 private void startDragAndDrop() { 1092 getSelectionActionModeHelper().onSelectionDrag(); 1093 1094 // TODO: Fix drag and drop in full screen extracted mode. 1095 if (mTextView.isInExtractedMode()) { 1096 return; 1097 } 1098 final int start = mTextView.getSelectionStart(); 1099 final int end = mTextView.getSelectionEnd(); 1100 CharSequence selectedText = mTextView.getTransformedText(start, end); 1101 ClipData data = ClipData.newPlainText(null, selectedText); 1102 DragLocalState localState = new DragLocalState(mTextView, start, end); 1103 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1104 View.DRAG_FLAG_GLOBAL); 1105 stopTextActionMode(); 1106 if (hasSelectionController()) { 1107 getSelectionController().resetTouchOffsets(); 1108 } 1109 } 1110 1111 public boolean performLongClick(boolean handled) { 1112 // Long press in empty space moves cursor and starts the insertion action mode. 1113 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1114 && mInsertionControllerEnabled) { 1115 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1116 mLastDownPositionY); 1117 Selection.setSelection((Spannable) mTextView.getText(), offset); 1118 getInsertionController().show(); 1119 mIsInsertionActionModeStartPending = true; 1120 handled = true; 1121 MetricsLogger.action( 1122 mTextView.getContext(), 1123 MetricsEvent.TEXT_LONGPRESS, 1124 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1125 } 1126 1127 if (!handled && mTextActionMode != null) { 1128 if (touchPositionIsInSelection()) { 1129 startDragAndDrop(); 1130 MetricsLogger.action( 1131 mTextView.getContext(), 1132 MetricsEvent.TEXT_LONGPRESS, 1133 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1134 } else { 1135 stopTextActionMode(); 1136 selectCurrentWordAndStartDrag(); 1137 MetricsLogger.action( 1138 mTextView.getContext(), 1139 MetricsEvent.TEXT_LONGPRESS, 1140 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1141 } 1142 handled = true; 1143 } 1144 1145 // Start a new selection 1146 if (!handled) { 1147 handled = selectCurrentWordAndStartDrag(); 1148 if (handled) { 1149 MetricsLogger.action( 1150 mTextView.getContext(), 1151 MetricsEvent.TEXT_LONGPRESS, 1152 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1153 } 1154 } 1155 1156 return handled; 1157 } 1158 1159 float getLastUpPositionX() { 1160 return mLastUpPositionX; 1161 } 1162 1163 float getLastUpPositionY() { 1164 return mLastUpPositionY; 1165 } 1166 1167 private long getLastTouchOffsets() { 1168 SelectionModifierCursorController selectionController = getSelectionController(); 1169 final int minOffset = selectionController.getMinTouchOffset(); 1170 final int maxOffset = selectionController.getMaxTouchOffset(); 1171 return TextUtils.packRangeInLong(minOffset, maxOffset); 1172 } 1173 1174 void onFocusChanged(boolean focused, int direction) { 1175 mShowCursor = SystemClock.uptimeMillis(); 1176 ensureEndedBatchEdit(); 1177 1178 if (focused) { 1179 int selStart = mTextView.getSelectionStart(); 1180 int selEnd = mTextView.getSelectionEnd(); 1181 1182 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1183 // mode for these, unless there was a specific selection already started. 1184 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1185 && selEnd == mTextView.getText().length(); 1186 1187 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1188 && !isFocusHighlighted; 1189 1190 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1191 // If a tap was used to give focus to that view, move cursor at tap position. 1192 // Has to be done before onTakeFocus, which can be overloaded. 1193 final int lastTapPosition = getLastTapPosition(); 1194 if (lastTapPosition >= 0) { 1195 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1196 } 1197 1198 // Note this may have to be moved out of the Editor class 1199 MovementMethod mMovement = mTextView.getMovementMethod(); 1200 if (mMovement != null) { 1201 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1202 } 1203 1204 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1205 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1206 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1207 // This special case ensure that we keep current selection in that case. 1208 // It would be better to know why the DecorView does not have focus at that time. 1209 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1210 && selStart >= 0 && selEnd >= 0) { 1211 /* 1212 * Someone intentionally set the selection, so let them 1213 * do whatever it is that they wanted to do instead of 1214 * the default on-focus behavior. We reset the selection 1215 * here instead of just skipping the onTakeFocus() call 1216 * because some movement methods do something other than 1217 * just setting the selection in theirs and we still 1218 * need to go through that path. 1219 */ 1220 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1221 } 1222 1223 if (mSelectAllOnFocus) { 1224 mTextView.selectAllText(); 1225 } 1226 1227 mTouchFocusSelected = true; 1228 } 1229 1230 mFrozenWithFocus = false; 1231 mSelectionMoved = false; 1232 1233 if (mError != null) { 1234 showError(); 1235 } 1236 1237 makeBlink(); 1238 } else { 1239 if (mError != null) { 1240 hideError(); 1241 } 1242 // Don't leave us in the middle of a batch edit. 1243 mTextView.onEndBatchEdit(); 1244 1245 if (mTextView.isInExtractedMode()) { 1246 hideCursorAndSpanControllers(); 1247 stopTextActionModeWithPreservingSelection(); 1248 } else { 1249 hideCursorAndSpanControllers(); 1250 if (mTextView.isTemporarilyDetached()) { 1251 stopTextActionModeWithPreservingSelection(); 1252 } else { 1253 stopTextActionMode(); 1254 } 1255 downgradeEasyCorrectionSpans(); 1256 } 1257 // No need to create the controller 1258 if (mSelectionModifierCursorController != null) { 1259 mSelectionModifierCursorController.resetTouchOffsets(); 1260 } 1261 } 1262 } 1263 1264 /** 1265 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1266 * span. 1267 */ 1268 private void downgradeEasyCorrectionSpans() { 1269 CharSequence text = mTextView.getText(); 1270 if (text instanceof Spannable) { 1271 Spannable spannable = (Spannable) text; 1272 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1273 spannable.length(), SuggestionSpan.class); 1274 for (int i = 0; i < suggestionSpans.length; i++) { 1275 int flags = suggestionSpans[i].getFlags(); 1276 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1277 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1278 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1279 suggestionSpans[i].setFlags(flags); 1280 } 1281 } 1282 } 1283 } 1284 1285 void sendOnTextChanged(int start, int before, int after) { 1286 getSelectionActionModeHelper().onTextChanged(start, start + before); 1287 updateSpellCheckSpans(start, start + after, false); 1288 1289 // Flip flag to indicate the word iterator needs to have the text reset. 1290 mUpdateWordIteratorText = true; 1291 1292 // Hide the controllers as soon as text is modified (typing, procedural...) 1293 // We do not hide the span controllers, since they can be added when a new text is 1294 // inserted into the text view (voice IME). 1295 hideCursorControllers(); 1296 // Reset drag accelerator. 1297 if (mSelectionModifierCursorController != null) { 1298 mSelectionModifierCursorController.resetTouchOffsets(); 1299 } 1300 stopTextActionMode(); 1301 } 1302 1303 private int getLastTapPosition() { 1304 // No need to create the controller at that point, no last tap position saved 1305 if (mSelectionModifierCursorController != null) { 1306 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1307 if (lastTapPosition >= 0) { 1308 // Safety check, should not be possible. 1309 if (lastTapPosition > mTextView.getText().length()) { 1310 lastTapPosition = mTextView.getText().length(); 1311 } 1312 return lastTapPosition; 1313 } 1314 } 1315 1316 return -1; 1317 } 1318 1319 void onWindowFocusChanged(boolean hasWindowFocus) { 1320 if (hasWindowFocus) { 1321 if (mBlink != null) { 1322 mBlink.uncancel(); 1323 makeBlink(); 1324 } 1325 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1326 refreshTextActionMode(); 1327 } 1328 } else { 1329 if (mBlink != null) { 1330 mBlink.cancel(); 1331 } 1332 if (mInputContentType != null) { 1333 mInputContentType.enterDown = false; 1334 } 1335 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1336 hideCursorAndSpanControllers(); 1337 stopTextActionModeWithPreservingSelection(); 1338 if (mSuggestionsPopupWindow != null) { 1339 mSuggestionsPopupWindow.onParentLostFocus(); 1340 } 1341 1342 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1343 ensureEndedBatchEdit(); 1344 } 1345 } 1346 1347 private void updateTapState(MotionEvent event) { 1348 final int action = event.getActionMasked(); 1349 if (action == MotionEvent.ACTION_DOWN) { 1350 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1351 // Detect double tap and triple click. 1352 if (((mTapState == TAP_STATE_FIRST_TAP) 1353 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1354 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1355 <= ViewConfiguration.getDoubleTapTimeout()) { 1356 if (mTapState == TAP_STATE_FIRST_TAP) { 1357 mTapState = TAP_STATE_DOUBLE_TAP; 1358 } else { 1359 mTapState = TAP_STATE_TRIPLE_CLICK; 1360 } 1361 } else { 1362 mTapState = TAP_STATE_FIRST_TAP; 1363 } 1364 } 1365 if (action == MotionEvent.ACTION_UP) { 1366 mLastTouchUpTime = SystemClock.uptimeMillis(); 1367 } 1368 } 1369 1370 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1371 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1372 return false; 1373 } 1374 final boolean primaryButtonStateChanged = 1375 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1376 final int action = event.getActionMasked(); 1377 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1378 && !primaryButtonStateChanged) { 1379 return true; 1380 } 1381 if (action == MotionEvent.ACTION_MOVE 1382 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1383 return true; 1384 } 1385 return false; 1386 } 1387 1388 void onTouchEvent(MotionEvent event) { 1389 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1390 mLastButtonState = event.getButtonState(); 1391 if (filterOutEvent) { 1392 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1393 mDiscardNextActionUp = true; 1394 } 1395 return; 1396 } 1397 updateTapState(event); 1398 updateFloatingToolbarVisibility(event); 1399 1400 if (hasSelectionController()) { 1401 getSelectionController().onTouchEvent(event); 1402 } 1403 1404 if (mShowSuggestionRunnable != null) { 1405 mTextView.removeCallbacks(mShowSuggestionRunnable); 1406 mShowSuggestionRunnable = null; 1407 } 1408 1409 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1410 mLastUpPositionX = event.getX(); 1411 mLastUpPositionY = event.getY(); 1412 } 1413 1414 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1415 mLastDownPositionX = event.getX(); 1416 mLastDownPositionY = event.getY(); 1417 1418 // Reset this state; it will be re-set if super.onTouchEvent 1419 // causes focus to move to the view. 1420 mTouchFocusSelected = false; 1421 mIgnoreActionUpEvent = false; 1422 } 1423 } 1424 1425 private void updateFloatingToolbarVisibility(MotionEvent event) { 1426 if (mTextActionMode != null) { 1427 switch (event.getActionMasked()) { 1428 case MotionEvent.ACTION_MOVE: 1429 hideFloatingToolbar(ActionMode.DEFAULT_HIDE_DURATION); 1430 break; 1431 case MotionEvent.ACTION_UP: // fall through 1432 case MotionEvent.ACTION_CANCEL: 1433 showFloatingToolbar(); 1434 } 1435 } 1436 } 1437 1438 void hideFloatingToolbar(int duration) { 1439 if (mTextActionMode != null) { 1440 mTextView.removeCallbacks(mShowFloatingToolbar); 1441 mTextActionMode.hide(duration); 1442 } 1443 } 1444 1445 private void showFloatingToolbar() { 1446 if (mTextActionMode != null) { 1447 // Delay "show" so it doesn't interfere with click confirmations 1448 // or double-clicks that could "dismiss" the floating toolbar. 1449 int delay = ViewConfiguration.getDoubleTapTimeout(); 1450 mTextView.postDelayed(mShowFloatingToolbar, delay); 1451 1452 // This classifies the text and most likely returns before the toolbar is actually 1453 // shown. If not, it will update the toolbar with the result when classification 1454 // returns. We would rather not wait for a long running classification process. 1455 invalidateActionModeAsync(); 1456 } 1457 } 1458 1459 public void beginBatchEdit() { 1460 mInBatchEditControllers = true; 1461 final InputMethodState ims = mInputMethodState; 1462 if (ims != null) { 1463 int nesting = ++ims.mBatchEditNesting; 1464 if (nesting == 1) { 1465 ims.mCursorChanged = false; 1466 ims.mChangedDelta = 0; 1467 if (ims.mContentChanged) { 1468 // We already have a pending change from somewhere else, 1469 // so turn this into a full update. 1470 ims.mChangedStart = 0; 1471 ims.mChangedEnd = mTextView.getText().length(); 1472 } else { 1473 ims.mChangedStart = EXTRACT_UNKNOWN; 1474 ims.mChangedEnd = EXTRACT_UNKNOWN; 1475 ims.mContentChanged = false; 1476 } 1477 mUndoInputFilter.beginBatchEdit(); 1478 mTextView.onBeginBatchEdit(); 1479 } 1480 } 1481 } 1482 1483 public void endBatchEdit() { 1484 mInBatchEditControllers = false; 1485 final InputMethodState ims = mInputMethodState; 1486 if (ims != null) { 1487 int nesting = --ims.mBatchEditNesting; 1488 if (nesting == 0) { 1489 finishBatchEdit(ims); 1490 } 1491 } 1492 } 1493 1494 void ensureEndedBatchEdit() { 1495 final InputMethodState ims = mInputMethodState; 1496 if (ims != null && ims.mBatchEditNesting != 0) { 1497 ims.mBatchEditNesting = 0; 1498 finishBatchEdit(ims); 1499 } 1500 } 1501 1502 void finishBatchEdit(final InputMethodState ims) { 1503 mTextView.onEndBatchEdit(); 1504 mUndoInputFilter.endBatchEdit(); 1505 1506 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1507 mTextView.updateAfterEdit(); 1508 reportExtractedText(); 1509 } else if (ims.mCursorChanged) { 1510 // Cheesy way to get us to report the current cursor location. 1511 mTextView.invalidateCursor(); 1512 } 1513 // sendUpdateSelection knows to avoid sending if the selection did 1514 // not actually change. 1515 sendUpdateSelection(); 1516 1517 // Show drag handles if they were blocked by batch edit mode. 1518 if (mTextActionMode != null) { 1519 final CursorController cursorController = mTextView.hasSelection() 1520 ? getSelectionController() : getInsertionController(); 1521 if (cursorController != null && !cursorController.isActive() 1522 && !cursorController.isCursorBeingModified()) { 1523 cursorController.show(); 1524 } 1525 } 1526 } 1527 1528 static final int EXTRACT_NOTHING = -2; 1529 static final int EXTRACT_UNKNOWN = -1; 1530 1531 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1532 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1533 EXTRACT_UNKNOWN, outText); 1534 } 1535 1536 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1537 int partialStartOffset, int partialEndOffset, int delta, 1538 @Nullable ExtractedText outText) { 1539 if (request == null || outText == null) { 1540 return false; 1541 } 1542 1543 final CharSequence content = mTextView.getText(); 1544 if (content == null) { 1545 return false; 1546 } 1547 1548 if (partialStartOffset != EXTRACT_NOTHING) { 1549 final int N = content.length(); 1550 if (partialStartOffset < 0) { 1551 outText.partialStartOffset = outText.partialEndOffset = -1; 1552 partialStartOffset = 0; 1553 partialEndOffset = N; 1554 } else { 1555 // Now use the delta to determine the actual amount of text 1556 // we need. 1557 partialEndOffset += delta; 1558 // Adjust offsets to ensure we contain full spans. 1559 if (content instanceof Spanned) { 1560 Spanned spanned = (Spanned) content; 1561 Object[] spans = spanned.getSpans(partialStartOffset, 1562 partialEndOffset, ParcelableSpan.class); 1563 int i = spans.length; 1564 while (i > 0) { 1565 i--; 1566 int j = spanned.getSpanStart(spans[i]); 1567 if (j < partialStartOffset) partialStartOffset = j; 1568 j = spanned.getSpanEnd(spans[i]); 1569 if (j > partialEndOffset) partialEndOffset = j; 1570 } 1571 } 1572 outText.partialStartOffset = partialStartOffset; 1573 outText.partialEndOffset = partialEndOffset - delta; 1574 1575 if (partialStartOffset > N) { 1576 partialStartOffset = N; 1577 } else if (partialStartOffset < 0) { 1578 partialStartOffset = 0; 1579 } 1580 if (partialEndOffset > N) { 1581 partialEndOffset = N; 1582 } else if (partialEndOffset < 0) { 1583 partialEndOffset = 0; 1584 } 1585 } 1586 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1587 outText.text = content.subSequence(partialStartOffset, 1588 partialEndOffset); 1589 } else { 1590 outText.text = TextUtils.substring(content, partialStartOffset, 1591 partialEndOffset); 1592 } 1593 } else { 1594 outText.partialStartOffset = 0; 1595 outText.partialEndOffset = 0; 1596 outText.text = ""; 1597 } 1598 outText.flags = 0; 1599 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1600 outText.flags |= ExtractedText.FLAG_SELECTING; 1601 } 1602 if (mTextView.isSingleLine()) { 1603 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1604 } 1605 outText.startOffset = 0; 1606 outText.selectionStart = mTextView.getSelectionStart(); 1607 outText.selectionEnd = mTextView.getSelectionEnd(); 1608 outText.hint = mTextView.getHint(); 1609 return true; 1610 } 1611 1612 boolean reportExtractedText() { 1613 final Editor.InputMethodState ims = mInputMethodState; 1614 if (ims == null) { 1615 return false; 1616 } 1617 ims.mSelectionModeChanged = false; 1618 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1619 if (req == null) { 1620 return false; 1621 } 1622 final InputMethodManager imm = InputMethodManager.peekInstance(); 1623 if (imm == null) { 1624 return false; 1625 } 1626 if (TextView.DEBUG_EXTRACT) { 1627 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1628 + ims.mChangedStart 1629 + " end=" + ims.mChangedEnd 1630 + " delta=" + ims.mChangedDelta); 1631 } 1632 if (ims.mChangedStart < 0 && !ims.mContentChanged) { 1633 ims.mChangedStart = EXTRACT_NOTHING; 1634 } 1635 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1636 ims.mChangedDelta, ims.mExtractedText)) { 1637 if (TextView.DEBUG_EXTRACT) { 1638 Log.v(TextView.LOG_TAG, 1639 "Reporting extracted start=" 1640 + ims.mExtractedText.partialStartOffset 1641 + " end=" + ims.mExtractedText.partialEndOffset 1642 + ": " + ims.mExtractedText.text); 1643 } 1644 1645 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1646 ims.mChangedStart = EXTRACT_UNKNOWN; 1647 ims.mChangedEnd = EXTRACT_UNKNOWN; 1648 ims.mChangedDelta = 0; 1649 ims.mContentChanged = false; 1650 return true; 1651 } 1652 return false; 1653 } 1654 1655 private void sendUpdateSelection() { 1656 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1657 final InputMethodManager imm = InputMethodManager.peekInstance(); 1658 if (null != imm) { 1659 final int selectionStart = mTextView.getSelectionStart(); 1660 final int selectionEnd = mTextView.getSelectionEnd(); 1661 int candStart = -1; 1662 int candEnd = -1; 1663 if (mTextView.getText() instanceof Spannable) { 1664 final Spannable sp = (Spannable) mTextView.getText(); 1665 candStart = EditableInputConnection.getComposingSpanStart(sp); 1666 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1667 } 1668 // InputMethodManager#updateSelection skips sending the message if 1669 // none of the parameters have changed since the last time we called it. 1670 imm.updateSelection(mTextView, 1671 selectionStart, selectionEnd, candStart, candEnd); 1672 } 1673 } 1674 } 1675 1676 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1677 int cursorOffsetVertical) { 1678 final int selectionStart = mTextView.getSelectionStart(); 1679 final int selectionEnd = mTextView.getSelectionEnd(); 1680 1681 final InputMethodState ims = mInputMethodState; 1682 if (ims != null && ims.mBatchEditNesting == 0) { 1683 InputMethodManager imm = InputMethodManager.peekInstance(); 1684 if (imm != null) { 1685 if (imm.isActive(mTextView)) { 1686 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1687 // We are in extract mode and the content has changed 1688 // in some way... just report complete new text to the 1689 // input method. 1690 reportExtractedText(); 1691 } 1692 } 1693 } 1694 } 1695 1696 if (mCorrectionHighlighter != null) { 1697 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1698 } 1699 1700 if (highlight != null && selectionStart == selectionEnd && mDrawableForCursor != null) { 1701 drawCursor(canvas, cursorOffsetVertical); 1702 // Rely on the drawable entirely, do not draw the cursor line. 1703 // Has to be done after the IMM related code above which relies on the highlight. 1704 highlight = null; 1705 } 1706 1707 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1708 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1709 cursorOffsetVertical); 1710 } else { 1711 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1712 } 1713 1714 if (mSelectionActionModeHelper != null) { 1715 mSelectionActionModeHelper.onDraw(canvas); 1716 } 1717 } 1718 1719 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1720 Paint highlightPaint, int cursorOffsetVertical) { 1721 final long lineRange = layout.getLineRangeForDraw(canvas); 1722 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1723 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1724 if (lastLine < 0) return; 1725 1726 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1727 firstLine, lastLine); 1728 1729 if (layout instanceof DynamicLayout) { 1730 if (mTextRenderNodes == null) { 1731 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1732 } 1733 1734 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1735 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1736 int[] blockIndices = dynamicLayout.getBlockIndices(); 1737 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1738 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1739 1740 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1741 if (blockSet != null) { 1742 for (int i = 0; i < blockSet.size(); i++) { 1743 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1744 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1745 && mTextRenderNodes[blockIndex] != null) { 1746 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1747 } 1748 } 1749 } 1750 1751 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1752 if (startBlock < 0) { 1753 startBlock = -(startBlock + 1); 1754 } 1755 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1756 1757 int startIndexToFindAvailableRenderNode = 0; 1758 int lastIndex = numberOfBlocks; 1759 1760 for (int i = startBlock; i < numberOfBlocks; i++) { 1761 final int blockIndex = blockIndices[i]; 1762 if (i >= indexFirstChangedBlock 1763 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1764 && mTextRenderNodes[blockIndex] != null) { 1765 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1766 } 1767 if (blockEndLines[i] < firstLine) { 1768 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1769 // be redrawn after they get scrolled into drawing range. 1770 continue; 1771 } 1772 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1773 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1774 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1775 if (blockEndLines[i] >= lastLine) { 1776 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1777 break; 1778 } 1779 } 1780 if (blockSet != null) { 1781 for (int i = 0; i < blockSet.size(); i++) { 1782 final int block = blockSet.valueAt(i); 1783 final int blockIndex = dynamicLayout.getBlockIndex(block); 1784 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1785 || mTextRenderNodes[blockIndex] == null 1786 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1787 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1788 layout, highlight, highlightPaint, cursorOffsetVertical, 1789 blockEndLines, blockIndices, block, numberOfBlocks, 1790 startIndexToFindAvailableRenderNode); 1791 } 1792 } 1793 } 1794 1795 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1796 } else { 1797 // Boring layout is used for empty and hint text 1798 layout.drawText(canvas, firstLine, lastLine); 1799 } 1800 } 1801 1802 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1803 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1804 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1805 int startIndexToFindAvailableRenderNode) { 1806 final int blockEndLine = blockEndLines[blockInfoIndex]; 1807 int blockIndex = blockIndices[blockInfoIndex]; 1808 1809 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1810 if (blockIsInvalid) { 1811 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1812 startIndexToFindAvailableRenderNode); 1813 // Note how dynamic layout's internal block indices get updated from Editor 1814 blockIndices[blockInfoIndex] = blockIndex; 1815 if (mTextRenderNodes[blockIndex] != null) { 1816 mTextRenderNodes[blockIndex].isDirty = true; 1817 } 1818 startIndexToFindAvailableRenderNode = blockIndex + 1; 1819 } 1820 1821 if (mTextRenderNodes[blockIndex] == null) { 1822 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1823 } 1824 1825 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1826 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1827 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1828 final int blockBeginLine = blockInfoIndex == 0 ? 1829 0 : blockEndLines[blockInfoIndex - 1] + 1; 1830 final int top = layout.getLineTop(blockBeginLine); 1831 final int bottom = layout.getLineBottom(blockEndLine); 1832 int left = 0; 1833 int right = mTextView.getWidth(); 1834 if (mTextView.getHorizontallyScrolling()) { 1835 float min = Float.MAX_VALUE; 1836 float max = Float.MIN_VALUE; 1837 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1838 min = Math.min(min, layout.getLineLeft(line)); 1839 max = Math.max(max, layout.getLineRight(line)); 1840 } 1841 left = (int) min; 1842 right = (int) (max + 0.5f); 1843 } 1844 1845 // Rebuild display list if it is invalid 1846 if (blockDisplayListIsInvalid) { 1847 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1848 right - left, bottom - top); 1849 try { 1850 // drawText is always relative to TextView's origin, this translation 1851 // brings this range of text back to the top left corner of the viewport 1852 displayListCanvas.translate(-left, -top); 1853 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1854 mTextRenderNodes[blockIndex].isDirty = false; 1855 // No need to untranslate, previous context is popped after 1856 // drawDisplayList 1857 } finally { 1858 blockDisplayList.end(displayListCanvas); 1859 // Same as drawDisplayList below, handled by our TextView's parent 1860 blockDisplayList.setClipToBounds(false); 1861 } 1862 } 1863 1864 // Valid display list only needs to update its drawing location. 1865 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1866 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1867 } 1868 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1869 return startIndexToFindAvailableRenderNode; 1870 } 1871 1872 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1873 int searchStartIndex) { 1874 int length = mTextRenderNodes.length; 1875 for (int i = searchStartIndex; i < length; i++) { 1876 boolean blockIndexFound = false; 1877 for (int j = 0; j < numberOfBlocks; j++) { 1878 if (blockIndices[j] == i) { 1879 blockIndexFound = true; 1880 break; 1881 } 1882 } 1883 if (blockIndexFound) continue; 1884 return i; 1885 } 1886 1887 // No available index found, the pool has to grow 1888 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1889 return length; 1890 } 1891 1892 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1893 final boolean translate = cursorOffsetVertical != 0; 1894 if (translate) canvas.translate(0, cursorOffsetVertical); 1895 if (mDrawableForCursor != null) { 1896 mDrawableForCursor.draw(canvas); 1897 } 1898 if (translate) canvas.translate(0, -cursorOffsetVertical); 1899 } 1900 1901 void invalidateHandlesAndActionMode() { 1902 if (mSelectionModifierCursorController != null) { 1903 mSelectionModifierCursorController.invalidateHandles(); 1904 } 1905 if (mInsertionPointCursorController != null) { 1906 mInsertionPointCursorController.invalidateHandle(); 1907 } 1908 if (mTextActionMode != null) { 1909 invalidateActionMode(); 1910 } 1911 } 1912 1913 /** 1914 * Invalidates all the sub-display lists that overlap the specified character range 1915 */ 1916 void invalidateTextDisplayList(Layout layout, int start, int end) { 1917 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1918 final int firstLine = layout.getLineForOffset(start); 1919 final int lastLine = layout.getLineForOffset(end); 1920 1921 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1922 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1923 int[] blockIndices = dynamicLayout.getBlockIndices(); 1924 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1925 1926 int i = 0; 1927 // Skip the blocks before firstLine 1928 while (i < numberOfBlocks) { 1929 if (blockEndLines[i] >= firstLine) break; 1930 i++; 1931 } 1932 1933 // Invalidate all subsequent blocks until lastLine is passed 1934 while (i < numberOfBlocks) { 1935 final int blockIndex = blockIndices[i]; 1936 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1937 mTextRenderNodes[blockIndex].isDirty = true; 1938 } 1939 if (blockEndLines[i] >= lastLine) break; 1940 i++; 1941 } 1942 } 1943 } 1944 1945 void invalidateTextDisplayList() { 1946 if (mTextRenderNodes != null) { 1947 for (int i = 0; i < mTextRenderNodes.length; i++) { 1948 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1949 } 1950 } 1951 } 1952 1953 void updateCursorPosition() { 1954 if (mTextView.mCursorDrawableRes == 0) { 1955 mDrawableForCursor = null; 1956 return; 1957 } 1958 1959 final Layout layout = mTextView.getLayout(); 1960 final int offset = mTextView.getSelectionStart(); 1961 final int line = layout.getLineForOffset(offset); 1962 final int top = layout.getLineTop(line); 1963 final int bottom = layout.getLineBottomWithoutSpacing(line); 1964 1965 final boolean clamped = layout.shouldClampCursor(line); 1966 updateCursorPosition(top, bottom, layout.getPrimaryHorizontal(offset, clamped)); 1967 } 1968 1969 void refreshTextActionMode() { 1970 if (extractedTextModeWillBeStarted()) { 1971 mRestartActionModeOnNextRefresh = false; 1972 return; 1973 } 1974 final boolean hasSelection = mTextView.hasSelection(); 1975 final SelectionModifierCursorController selectionController = getSelectionController(); 1976 final InsertionPointCursorController insertionController = getInsertionController(); 1977 if ((selectionController != null && selectionController.isCursorBeingModified()) 1978 || (insertionController != null && insertionController.isCursorBeingModified())) { 1979 // ActionMode should be managed by the currently active cursor controller. 1980 mRestartActionModeOnNextRefresh = false; 1981 return; 1982 } 1983 if (hasSelection) { 1984 hideInsertionPointCursorController(); 1985 if (mTextActionMode == null) { 1986 if (mRestartActionModeOnNextRefresh) { 1987 // To avoid distraction, newly start action mode only when selection action 1988 // mode is being restarted. 1989 startSelectionActionModeAsync(false); 1990 } 1991 } else if (selectionController == null || !selectionController.isActive()) { 1992 // Insertion action mode is active. Avoid dismissing the selection. 1993 stopTextActionModeWithPreservingSelection(); 1994 startSelectionActionModeAsync(false); 1995 } else { 1996 mTextActionMode.invalidateContentRect(); 1997 } 1998 } else { 1999 // Insertion action mode is started only when insertion controller is explicitly 2000 // activated. 2001 if (insertionController == null || !insertionController.isActive()) { 2002 stopTextActionMode(); 2003 } else if (mTextActionMode != null) { 2004 mTextActionMode.invalidateContentRect(); 2005 } 2006 } 2007 mRestartActionModeOnNextRefresh = false; 2008 } 2009 2010 /** 2011 * Start an Insertion action mode. 2012 */ 2013 void startInsertionActionMode() { 2014 if (mInsertionActionModeRunnable != null) { 2015 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2016 } 2017 if (extractedTextModeWillBeStarted()) { 2018 return; 2019 } 2020 stopTextActionMode(); 2021 2022 ActionMode.Callback actionModeCallback = 2023 new TextActionModeCallback(false /* hasSelection */); 2024 mTextActionMode = mTextView.startActionMode( 2025 actionModeCallback, ActionMode.TYPE_FLOATING); 2026 if (mTextActionMode != null && getInsertionController() != null) { 2027 getInsertionController().show(); 2028 } 2029 } 2030 2031 @NonNull 2032 TextView getTextView() { 2033 return mTextView; 2034 } 2035 2036 @Nullable 2037 ActionMode getTextActionMode() { 2038 return mTextActionMode; 2039 } 2040 2041 void setRestartActionModeOnNextRefresh(boolean value) { 2042 mRestartActionModeOnNextRefresh = value; 2043 } 2044 2045 /** 2046 * Asynchronously starts a selection action mode using the TextClassifier. 2047 */ 2048 void startSelectionActionModeAsync(boolean adjustSelection) { 2049 getSelectionActionModeHelper().startActionModeAsync(adjustSelection); 2050 } 2051 2052 /** 2053 * Asynchronously invalidates an action mode using the TextClassifier. 2054 */ 2055 void invalidateActionModeAsync() { 2056 getSelectionActionModeHelper().invalidateActionModeAsync(); 2057 } 2058 2059 /** 2060 * Synchronously invalidates an action mode without the TextClassifier. 2061 */ 2062 private void invalidateActionMode() { 2063 if (mTextActionMode != null) { 2064 mTextActionMode.invalidate(); 2065 } 2066 } 2067 2068 private SelectionActionModeHelper getSelectionActionModeHelper() { 2069 if (mSelectionActionModeHelper == null) { 2070 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2071 } 2072 return mSelectionActionModeHelper; 2073 } 2074 2075 /** 2076 * If the TextView allows text selection, selects the current word when no existing selection 2077 * was available and starts a drag. 2078 * 2079 * @return true if the drag was started. 2080 */ 2081 private boolean selectCurrentWordAndStartDrag() { 2082 if (mInsertionActionModeRunnable != null) { 2083 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2084 } 2085 if (extractedTextModeWillBeStarted()) { 2086 return false; 2087 } 2088 if (!checkField()) { 2089 return false; 2090 } 2091 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2092 // No selection and cannot select a word. 2093 return false; 2094 } 2095 stopTextActionModeWithPreservingSelection(); 2096 getSelectionController().enterDrag( 2097 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2098 return true; 2099 } 2100 2101 /** 2102 * Checks whether a selection can be performed on the current TextView. 2103 * 2104 * @return true if a selection can be performed 2105 */ 2106 boolean checkField() { 2107 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2108 Log.w(TextView.LOG_TAG, 2109 "TextView does not support text selection. Selection cancelled."); 2110 return false; 2111 } 2112 return true; 2113 } 2114 2115 boolean startSelectionActionModeInternal() { 2116 if (extractedTextModeWillBeStarted()) { 2117 return false; 2118 } 2119 if (mTextActionMode != null) { 2120 // Text action mode is already started 2121 invalidateActionMode(); 2122 return false; 2123 } 2124 2125 if (!checkField() || !mTextView.hasSelection()) { 2126 return false; 2127 } 2128 2129 ActionMode.Callback actionModeCallback = 2130 new TextActionModeCallback(true /* hasSelection */); 2131 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2132 2133 final boolean selectionStarted = mTextActionMode != null; 2134 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2135 // Show the IME to be able to replace text, except when selecting non editable text. 2136 final InputMethodManager imm = InputMethodManager.peekInstance(); 2137 if (imm != null) { 2138 imm.showSoftInput(mTextView, 0, null); 2139 } 2140 } 2141 return selectionStarted; 2142 } 2143 2144 private boolean extractedTextModeWillBeStarted() { 2145 if (!(mTextView.isInExtractedMode())) { 2146 final InputMethodManager imm = InputMethodManager.peekInstance(); 2147 return imm != null && imm.isFullscreenMode(); 2148 } 2149 return false; 2150 } 2151 2152 /** 2153 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2154 * the current cursor position or selection range. This method is consistent with the 2155 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2156 */ 2157 private boolean shouldOfferToShowSuggestions() { 2158 CharSequence text = mTextView.getText(); 2159 if (!(text instanceof Spannable)) return false; 2160 2161 final Spannable spannable = (Spannable) text; 2162 final int selectionStart = mTextView.getSelectionStart(); 2163 final int selectionEnd = mTextView.getSelectionEnd(); 2164 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2165 SuggestionSpan.class); 2166 if (suggestionSpans.length == 0) { 2167 return false; 2168 } 2169 if (selectionStart == selectionEnd) { 2170 // Spans overlap the cursor. 2171 for (int i = 0; i < suggestionSpans.length; i++) { 2172 if (suggestionSpans[i].getSuggestions().length > 0) { 2173 return true; 2174 } 2175 } 2176 return false; 2177 } 2178 int minSpanStart = mTextView.getText().length(); 2179 int maxSpanEnd = 0; 2180 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2181 int unionOfSpansCoveringSelectionStartEnd = 0; 2182 boolean hasValidSuggestions = false; 2183 for (int i = 0; i < suggestionSpans.length; i++) { 2184 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2185 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2186 minSpanStart = Math.min(minSpanStart, spanStart); 2187 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2188 if (selectionStart < spanStart || selectionStart > spanEnd) { 2189 // The span doesn't cover the current selection start point. 2190 continue; 2191 } 2192 hasValidSuggestions = 2193 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2194 unionOfSpansCoveringSelectionStartStart = 2195 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2196 unionOfSpansCoveringSelectionStartEnd = 2197 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2198 } 2199 if (!hasValidSuggestions) { 2200 return false; 2201 } 2202 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2203 // No spans cover the selection start point. 2204 return false; 2205 } 2206 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2207 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2208 // There is a span that is not covered by the union. In this case, we soouldn't offer 2209 // to show suggestions as it's confusing. 2210 return false; 2211 } 2212 return true; 2213 } 2214 2215 /** 2216 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2217 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2218 */ 2219 private boolean isCursorInsideEasyCorrectionSpan() { 2220 Spannable spannable = (Spannable) mTextView.getText(); 2221 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2222 mTextView.getSelectionEnd(), SuggestionSpan.class); 2223 for (int i = 0; i < suggestionSpans.length; i++) { 2224 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2225 return true; 2226 } 2227 } 2228 return false; 2229 } 2230 2231 void onTouchUpEvent(MotionEvent event) { 2232 if (getSelectionActionModeHelper().resetSelection( 2233 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2234 return; 2235 } 2236 2237 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2238 hideCursorAndSpanControllers(); 2239 stopTextActionMode(); 2240 CharSequence text = mTextView.getText(); 2241 if (!selectAllGotFocus && text.length() > 0) { 2242 // Move cursor 2243 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2244 Selection.setSelection((Spannable) text, offset); 2245 if (mSpellChecker != null) { 2246 // When the cursor moves, the word that was typed may need spell check 2247 mSpellChecker.onSelectionChanged(); 2248 } 2249 2250 if (!extractedTextModeWillBeStarted()) { 2251 if (isCursorInsideEasyCorrectionSpan()) { 2252 // Cancel the single tap delayed runnable. 2253 if (mInsertionActionModeRunnable != null) { 2254 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2255 } 2256 2257 mShowSuggestionRunnable = new Runnable() { 2258 public void run() { 2259 replace(); 2260 } 2261 }; 2262 // removeCallbacks is performed on every touch 2263 mTextView.postDelayed(mShowSuggestionRunnable, 2264 ViewConfiguration.getDoubleTapTimeout()); 2265 } else if (hasInsertionController()) { 2266 getInsertionController().show(); 2267 } 2268 } 2269 } 2270 } 2271 2272 protected void stopTextActionMode() { 2273 if (mTextActionMode != null) { 2274 // This will hide the mSelectionModifierCursorController 2275 mTextActionMode.finish(); 2276 } 2277 } 2278 2279 private void stopTextActionModeWithPreservingSelection() { 2280 if (mTextActionMode != null) { 2281 mRestartActionModeOnNextRefresh = true; 2282 } 2283 mPreserveSelection = true; 2284 stopTextActionMode(); 2285 mPreserveSelection = false; 2286 } 2287 2288 /** 2289 * @return True if this view supports insertion handles. 2290 */ 2291 boolean hasInsertionController() { 2292 return mInsertionControllerEnabled; 2293 } 2294 2295 /** 2296 * @return True if this view supports selection handles. 2297 */ 2298 boolean hasSelectionController() { 2299 return mSelectionControllerEnabled; 2300 } 2301 2302 private InsertionPointCursorController getInsertionController() { 2303 if (!mInsertionControllerEnabled) { 2304 return null; 2305 } 2306 2307 if (mInsertionPointCursorController == null) { 2308 mInsertionPointCursorController = new InsertionPointCursorController(); 2309 2310 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2311 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2312 } 2313 2314 return mInsertionPointCursorController; 2315 } 2316 2317 @Nullable 2318 SelectionModifierCursorController getSelectionController() { 2319 if (!mSelectionControllerEnabled) { 2320 return null; 2321 } 2322 2323 if (mSelectionModifierCursorController == null) { 2324 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2325 2326 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2327 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2328 } 2329 2330 return mSelectionModifierCursorController; 2331 } 2332 2333 @VisibleForTesting 2334 @Nullable 2335 public Drawable getCursorDrawable() { 2336 return mDrawableForCursor; 2337 } 2338 2339 private void updateCursorPosition(int top, int bottom, float horizontal) { 2340 if (mDrawableForCursor == null) { 2341 mDrawableForCursor = mTextView.getContext().getDrawable( 2342 mTextView.mCursorDrawableRes); 2343 } 2344 final int left = clampHorizontalPosition(mDrawableForCursor, horizontal); 2345 final int width = mDrawableForCursor.getIntrinsicWidth(); 2346 mDrawableForCursor.setBounds(left, top - mTempRect.top, left + width, 2347 bottom + mTempRect.bottom); 2348 } 2349 2350 /** 2351 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2352 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2353 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2354 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2355 * of the view. 2356 * 2357 * @param drawable Drawable. Can be null. 2358 * @param horizontal Horizontal position for the drawable. 2359 * @return The clamped horizontal position for the drawable. 2360 */ 2361 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2362 horizontal = Math.max(0.5f, horizontal - 0.5f); 2363 if (mTempRect == null) mTempRect = new Rect(); 2364 2365 int drawableWidth = 0; 2366 if (drawable != null) { 2367 drawable.getPadding(mTempRect); 2368 drawableWidth = drawable.getIntrinsicWidth(); 2369 } else { 2370 mTempRect.setEmpty(); 2371 } 2372 2373 int scrollX = mTextView.getScrollX(); 2374 float horizontalDiff = horizontal - scrollX; 2375 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2376 - mTextView.getCompoundPaddingRight(); 2377 2378 final int left; 2379 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2380 // at the rightmost position 2381 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2382 } else if (Math.abs(horizontalDiff) <= 1f 2383 || (TextUtils.isEmpty(mTextView.getText()) 2384 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2385 && horizontal <= 1f)) { 2386 // at the leftmost position 2387 left = scrollX - mTempRect.left; 2388 } else { 2389 left = (int) horizontal - mTempRect.left; 2390 } 2391 return left; 2392 } 2393 2394 /** 2395 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2396 * a dictionary) from the current input method, provided by it calling 2397 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2398 * implementation flashes the background of the corrected word to provide feedback to the user. 2399 * 2400 * @param info The auto correct info about the text that was corrected. 2401 */ 2402 public void onCommitCorrection(CorrectionInfo info) { 2403 if (mCorrectionHighlighter == null) { 2404 mCorrectionHighlighter = new CorrectionHighlighter(); 2405 } else { 2406 mCorrectionHighlighter.invalidate(false); 2407 } 2408 2409 mCorrectionHighlighter.highlight(info); 2410 mUndoInputFilter.freezeLastEdit(); 2411 } 2412 2413 void onScrollChanged() { 2414 if (mPositionListener != null) { 2415 mPositionListener.onScrollChanged(); 2416 } 2417 if (mTextActionMode != null) { 2418 mTextActionMode.invalidateContentRect(); 2419 } 2420 } 2421 2422 /** 2423 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2424 */ 2425 private boolean shouldBlink() { 2426 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2427 2428 final int start = mTextView.getSelectionStart(); 2429 if (start < 0) return false; 2430 2431 final int end = mTextView.getSelectionEnd(); 2432 if (end < 0) return false; 2433 2434 return start == end; 2435 } 2436 2437 void makeBlink() { 2438 if (shouldBlink()) { 2439 mShowCursor = SystemClock.uptimeMillis(); 2440 if (mBlink == null) mBlink = new Blink(); 2441 mTextView.removeCallbacks(mBlink); 2442 mTextView.postDelayed(mBlink, BLINK); 2443 } else { 2444 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2445 } 2446 } 2447 2448 private class Blink implements Runnable { 2449 private boolean mCancelled; 2450 2451 public void run() { 2452 if (mCancelled) { 2453 return; 2454 } 2455 2456 mTextView.removeCallbacks(this); 2457 2458 if (shouldBlink()) { 2459 if (mTextView.getLayout() != null) { 2460 mTextView.invalidateCursorPath(); 2461 } 2462 2463 mTextView.postDelayed(this, BLINK); 2464 } 2465 } 2466 2467 void cancel() { 2468 if (!mCancelled) { 2469 mTextView.removeCallbacks(this); 2470 mCancelled = true; 2471 } 2472 } 2473 2474 void uncancel() { 2475 mCancelled = false; 2476 } 2477 } 2478 2479 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2480 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2481 com.android.internal.R.layout.text_drag_thumbnail, null); 2482 2483 if (shadowView == null) { 2484 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2485 } 2486 2487 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2488 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2489 end = TextUtils.unpackRangeEndFromLong(range); 2490 } 2491 final CharSequence text = mTextView.getTransformedText(start, end); 2492 shadowView.setText(text); 2493 shadowView.setTextColor(mTextView.getTextColors()); 2494 2495 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2496 shadowView.setGravity(Gravity.CENTER); 2497 2498 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2499 ViewGroup.LayoutParams.WRAP_CONTENT)); 2500 2501 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2502 shadowView.measure(size, size); 2503 2504 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2505 shadowView.invalidate(); 2506 return new DragShadowBuilder(shadowView); 2507 } 2508 2509 private static class DragLocalState { 2510 public TextView sourceTextView; 2511 public int start, end; 2512 2513 public DragLocalState(TextView sourceTextView, int start, int end) { 2514 this.sourceTextView = sourceTextView; 2515 this.start = start; 2516 this.end = end; 2517 } 2518 } 2519 2520 void onDrop(DragEvent event) { 2521 SpannableStringBuilder content = new SpannableStringBuilder(); 2522 2523 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2524 if (permissions != null) { 2525 permissions.takeTransient(); 2526 } 2527 2528 try { 2529 ClipData clipData = event.getClipData(); 2530 final int itemCount = clipData.getItemCount(); 2531 for (int i = 0; i < itemCount; i++) { 2532 Item item = clipData.getItemAt(i); 2533 content.append(item.coerceToStyledText(mTextView.getContext())); 2534 } 2535 } finally { 2536 if (permissions != null) { 2537 permissions.release(); 2538 } 2539 } 2540 2541 mTextView.beginBatchEdit(); 2542 mUndoInputFilter.freezeLastEdit(); 2543 try { 2544 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2545 Object localState = event.getLocalState(); 2546 DragLocalState dragLocalState = null; 2547 if (localState instanceof DragLocalState) { 2548 dragLocalState = (DragLocalState) localState; 2549 } 2550 boolean dragDropIntoItself = dragLocalState != null 2551 && dragLocalState.sourceTextView == mTextView; 2552 2553 if (dragDropIntoItself) { 2554 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2555 // A drop inside the original selection discards the drop. 2556 return; 2557 } 2558 } 2559 2560 final int originalLength = mTextView.getText().length(); 2561 int min = offset; 2562 int max = offset; 2563 2564 Selection.setSelection((Spannable) mTextView.getText(), max); 2565 mTextView.replaceText_internal(min, max, content); 2566 2567 if (dragDropIntoItself) { 2568 int dragSourceStart = dragLocalState.start; 2569 int dragSourceEnd = dragLocalState.end; 2570 if (max <= dragSourceStart) { 2571 // Inserting text before selection has shifted positions 2572 final int shift = mTextView.getText().length() - originalLength; 2573 dragSourceStart += shift; 2574 dragSourceEnd += shift; 2575 } 2576 2577 // Delete original selection 2578 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2579 2580 // Make sure we do not leave two adjacent spaces. 2581 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2582 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2583 if (nextCharIdx > prevCharIdx + 1) { 2584 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2585 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2586 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2587 } 2588 } 2589 } 2590 } finally { 2591 mTextView.endBatchEdit(); 2592 mUndoInputFilter.freezeLastEdit(); 2593 } 2594 } 2595 2596 public void addSpanWatchers(Spannable text) { 2597 final int textLength = text.length(); 2598 2599 if (mKeyListener != null) { 2600 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2601 } 2602 2603 if (mSpanController == null) { 2604 mSpanController = new SpanController(); 2605 } 2606 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2607 } 2608 2609 void setContextMenuAnchor(float x, float y) { 2610 mContextMenuAnchorX = x; 2611 mContextMenuAnchorY = y; 2612 } 2613 2614 void onCreateContextMenu(ContextMenu menu) { 2615 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2616 || Float.isNaN(mContextMenuAnchorY)) { 2617 return; 2618 } 2619 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2620 if (offset == -1) { 2621 return; 2622 } 2623 2624 stopTextActionModeWithPreservingSelection(); 2625 if (mTextView.canSelectText()) { 2626 final boolean isOnSelection = mTextView.hasSelection() 2627 && offset >= mTextView.getSelectionStart() 2628 && offset <= mTextView.getSelectionEnd(); 2629 if (!isOnSelection) { 2630 // Right clicked position is not on the selection. Remove the selection and move the 2631 // cursor to the right clicked position. 2632 Selection.setSelection((Spannable) mTextView.getText(), offset); 2633 stopTextActionMode(); 2634 } 2635 } 2636 2637 if (shouldOfferToShowSuggestions()) { 2638 final SuggestionInfo[] suggestionInfoArray = 2639 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2640 for (int i = 0; i < suggestionInfoArray.length; i++) { 2641 suggestionInfoArray[i] = new SuggestionInfo(); 2642 } 2643 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2644 com.android.internal.R.string.replace); 2645 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2646 for (int i = 0; i < numItems; i++) { 2647 final SuggestionInfo info = suggestionInfoArray[i]; 2648 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2649 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2650 @Override 2651 public boolean onMenuItemClick(MenuItem item) { 2652 replaceWithSuggestion(info); 2653 return true; 2654 } 2655 }); 2656 } 2657 } 2658 2659 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2660 com.android.internal.R.string.undo) 2661 .setAlphabeticShortcut('z') 2662 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2663 .setEnabled(mTextView.canUndo()); 2664 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2665 com.android.internal.R.string.redo) 2666 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2667 .setEnabled(mTextView.canRedo()); 2668 2669 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2670 com.android.internal.R.string.cut) 2671 .setAlphabeticShortcut('x') 2672 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2673 .setEnabled(mTextView.canCut()); 2674 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2675 com.android.internal.R.string.copy) 2676 .setAlphabeticShortcut('c') 2677 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2678 .setEnabled(mTextView.canCopy()); 2679 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2680 com.android.internal.R.string.paste) 2681 .setAlphabeticShortcut('v') 2682 .setEnabled(mTextView.canPaste()) 2683 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2684 menu.add(Menu.NONE, TextView.ID_PASTE_AS_PLAIN_TEXT, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2685 com.android.internal.R.string.paste_as_plain_text) 2686 .setEnabled(mTextView.canPasteAsPlainText()) 2687 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2688 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2689 com.android.internal.R.string.share) 2690 .setEnabled(mTextView.canShare()) 2691 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2692 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2693 com.android.internal.R.string.selectAll) 2694 .setAlphabeticShortcut('a') 2695 .setEnabled(mTextView.canSelectAllText()) 2696 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2697 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2698 android.R.string.autofill) 2699 .setEnabled(mTextView.canRequestAutofill()) 2700 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2701 2702 mPreserveSelection = true; 2703 } 2704 2705 @Nullable 2706 private SuggestionSpan findEquivalentSuggestionSpan( 2707 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2708 final Editable editable = (Editable) mTextView.getText(); 2709 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2710 // Exactly same span is found. 2711 return suggestionSpanInfo.mSuggestionSpan; 2712 } 2713 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2714 // contents. 2715 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2716 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2717 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2718 final int start = editable.getSpanStart(suggestionSpan); 2719 if (start != suggestionSpanInfo.mSpanStart) { 2720 continue; 2721 } 2722 final int end = editable.getSpanEnd(suggestionSpan); 2723 if (end != suggestionSpanInfo.mSpanEnd) { 2724 continue; 2725 } 2726 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2727 return suggestionSpan; 2728 } 2729 } 2730 return null; 2731 } 2732 2733 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2734 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2735 suggestionInfo.mSuggestionSpanInfo); 2736 if (targetSuggestionSpan == null) { 2737 // Span has been removed 2738 return; 2739 } 2740 final Editable editable = (Editable) mTextView.getText(); 2741 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2742 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2743 if (spanStart < 0 || spanEnd <= spanStart) { 2744 // Span has been removed 2745 return; 2746 } 2747 2748 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2749 // SuggestionSpans are removed by replace: save them before 2750 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2751 SuggestionSpan.class); 2752 final int length = suggestionSpans.length; 2753 int[] suggestionSpansStarts = new int[length]; 2754 int[] suggestionSpansEnds = new int[length]; 2755 int[] suggestionSpansFlags = new int[length]; 2756 for (int i = 0; i < length; i++) { 2757 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2758 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2759 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2760 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2761 2762 // Remove potential misspelled flags 2763 int suggestionSpanFlags = suggestionSpan.getFlags(); 2764 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2765 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2766 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2767 suggestionSpan.setFlags(suggestionSpanFlags); 2768 } 2769 } 2770 2771 // Notify source IME of the suggestion pick. Do this before swapping texts. 2772 targetSuggestionSpan.notifySelection( 2773 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2774 2775 // Swap text content between actual text and Suggestion span 2776 final int suggestionStart = suggestionInfo.mSuggestionStart; 2777 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2778 final String suggestion = suggestionInfo.mText.subSequence( 2779 suggestionStart, suggestionEnd).toString(); 2780 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2781 2782 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2783 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2784 2785 // Restore previous SuggestionSpans 2786 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2787 for (int i = 0; i < length; i++) { 2788 // Only spans that include the modified region make sense after replacement 2789 // Spans partially included in the replaced region are removed, there is no 2790 // way to assign them a valid range after replacement 2791 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2792 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2793 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2794 } 2795 } 2796 // Move cursor at the end of the replaced word 2797 final int newCursorPosition = spanEnd + lengthDelta; 2798 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2799 } 2800 2801 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2802 new MenuItem.OnMenuItemClickListener() { 2803 @Override 2804 public boolean onMenuItemClick(MenuItem item) { 2805 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2806 return true; 2807 } 2808 return mTextView.onTextContextMenuItem(item.getItemId()); 2809 } 2810 }; 2811 2812 /** 2813 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2814 * pop-up should be displayed. 2815 * Also monitors {@link Selection} to call back to the attached input method. 2816 */ 2817 private class SpanController implements SpanWatcher { 2818 2819 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2820 2821 private EasyEditPopupWindow mPopupWindow; 2822 2823 private Runnable mHidePopup; 2824 2825 // This function is pure but inner classes can't have static functions 2826 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2827 final Object span) { 2828 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2829 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2830 } 2831 2832 @Override 2833 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2834 if (isNonIntermediateSelectionSpan(text, span)) { 2835 sendUpdateSelection(); 2836 } else if (span instanceof EasyEditSpan) { 2837 if (mPopupWindow == null) { 2838 mPopupWindow = new EasyEditPopupWindow(); 2839 mHidePopup = new Runnable() { 2840 @Override 2841 public void run() { 2842 hide(); 2843 } 2844 }; 2845 } 2846 2847 // Make sure there is only at most one EasyEditSpan in the text 2848 if (mPopupWindow.mEasyEditSpan != null) { 2849 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2850 } 2851 2852 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2853 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2854 @Override 2855 public void onDeleteClick(EasyEditSpan span) { 2856 Editable editable = (Editable) mTextView.getText(); 2857 int start = editable.getSpanStart(span); 2858 int end = editable.getSpanEnd(span); 2859 if (start >= 0 && end >= 0) { 2860 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2861 mTextView.deleteText_internal(start, end); 2862 } 2863 editable.removeSpan(span); 2864 } 2865 }); 2866 2867 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2868 // The window is not visible yet, ignore the text change. 2869 return; 2870 } 2871 2872 if (mTextView.getLayout() == null) { 2873 // The view has not been laid out yet, ignore the text change 2874 return; 2875 } 2876 2877 if (extractedTextModeWillBeStarted()) { 2878 // The input is in extract mode. Do not handle the easy edit in 2879 // the original TextView, as the ExtractEditText will do 2880 return; 2881 } 2882 2883 mPopupWindow.show(); 2884 mTextView.removeCallbacks(mHidePopup); 2885 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2886 } 2887 } 2888 2889 @Override 2890 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2891 if (isNonIntermediateSelectionSpan(text, span)) { 2892 sendUpdateSelection(); 2893 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2894 hide(); 2895 } 2896 } 2897 2898 @Override 2899 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2900 int newStart, int newEnd) { 2901 if (isNonIntermediateSelectionSpan(text, span)) { 2902 sendUpdateSelection(); 2903 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2904 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2905 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2906 text.removeSpan(easyEditSpan); 2907 } 2908 } 2909 2910 public void hide() { 2911 if (mPopupWindow != null) { 2912 mPopupWindow.hide(); 2913 mTextView.removeCallbacks(mHidePopup); 2914 } 2915 } 2916 2917 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2918 try { 2919 PendingIntent pendingIntent = span.getPendingIntent(); 2920 if (pendingIntent != null) { 2921 Intent intent = new Intent(); 2922 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2923 pendingIntent.send(mTextView.getContext(), 0, intent); 2924 } 2925 } catch (CanceledException e) { 2926 // This should not happen, as we should try to send the intent only once. 2927 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2928 } 2929 } 2930 } 2931 2932 /** 2933 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2934 */ 2935 private interface EasyEditDeleteListener { 2936 2937 /** 2938 * Clicks the delete pop-up. 2939 */ 2940 void onDeleteClick(EasyEditSpan span); 2941 } 2942 2943 /** 2944 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2945 * by {@link SpanController}. 2946 */ 2947 private class EasyEditPopupWindow extends PinnedPopupWindow 2948 implements OnClickListener { 2949 private static final int POPUP_TEXT_LAYOUT = 2950 com.android.internal.R.layout.text_edit_action_popup_text; 2951 private TextView mDeleteTextView; 2952 private EasyEditSpan mEasyEditSpan; 2953 private EasyEditDeleteListener mOnDeleteListener; 2954 2955 @Override 2956 protected void createPopupWindow() { 2957 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2958 com.android.internal.R.attr.textSelectHandleWindowStyle); 2959 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2960 mPopupWindow.setClippingEnabled(true); 2961 } 2962 2963 @Override 2964 protected void initContentView() { 2965 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2966 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2967 mContentView = linearLayout; 2968 mContentView.setBackgroundResource( 2969 com.android.internal.R.drawable.text_edit_side_paste_window); 2970 2971 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 2972 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2973 2974 LayoutParams wrapContent = new LayoutParams( 2975 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2976 2977 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2978 mDeleteTextView.setLayoutParams(wrapContent); 2979 mDeleteTextView.setText(com.android.internal.R.string.delete); 2980 mDeleteTextView.setOnClickListener(this); 2981 mContentView.addView(mDeleteTextView); 2982 } 2983 2984 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2985 mEasyEditSpan = easyEditSpan; 2986 } 2987 2988 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2989 mOnDeleteListener = listener; 2990 } 2991 2992 @Override 2993 public void onClick(View view) { 2994 if (view == mDeleteTextView 2995 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2996 && mOnDeleteListener != null) { 2997 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2998 } 2999 } 3000 3001 @Override 3002 public void hide() { 3003 if (mEasyEditSpan != null) { 3004 mEasyEditSpan.setDeleteEnabled(false); 3005 } 3006 mOnDeleteListener = null; 3007 super.hide(); 3008 } 3009 3010 @Override 3011 protected int getTextOffset() { 3012 // Place the pop-up at the end of the span 3013 Editable editable = (Editable) mTextView.getText(); 3014 return editable.getSpanEnd(mEasyEditSpan); 3015 } 3016 3017 @Override 3018 protected int getVerticalLocalPosition(int line) { 3019 final Layout layout = mTextView.getLayout(); 3020 return layout.getLineBottomWithoutSpacing(line); 3021 } 3022 3023 @Override 3024 protected int clipVertically(int positionY) { 3025 // As we display the pop-up below the span, no vertical clipping is required. 3026 return positionY; 3027 } 3028 } 3029 3030 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 3031 // 3 handles 3032 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 3033 // 1 CursorAnchorInfoNotifier 3034 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 3035 private TextViewPositionListener[] mPositionListeners = 3036 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 3037 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 3038 private boolean mPositionHasChanged = true; 3039 // Absolute position of the TextView with respect to its parent window 3040 private int mPositionX, mPositionY; 3041 private int mPositionXOnScreen, mPositionYOnScreen; 3042 private int mNumberOfListeners; 3043 private boolean mScrollHasChanged; 3044 final int[] mTempCoords = new int[2]; 3045 3046 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 3047 if (mNumberOfListeners == 0) { 3048 updatePosition(); 3049 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3050 vto.addOnPreDrawListener(this); 3051 } 3052 3053 int emptySlotIndex = -1; 3054 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3055 TextViewPositionListener listener = mPositionListeners[i]; 3056 if (listener == positionListener) { 3057 return; 3058 } else if (emptySlotIndex < 0 && listener == null) { 3059 emptySlotIndex = i; 3060 } 3061 } 3062 3063 mPositionListeners[emptySlotIndex] = positionListener; 3064 mCanMove[emptySlotIndex] = canMove; 3065 mNumberOfListeners++; 3066 } 3067 3068 public void removeSubscriber(TextViewPositionListener positionListener) { 3069 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3070 if (mPositionListeners[i] == positionListener) { 3071 mPositionListeners[i] = null; 3072 mNumberOfListeners--; 3073 break; 3074 } 3075 } 3076 3077 if (mNumberOfListeners == 0) { 3078 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3079 vto.removeOnPreDrawListener(this); 3080 } 3081 } 3082 3083 public int getPositionX() { 3084 return mPositionX; 3085 } 3086 3087 public int getPositionY() { 3088 return mPositionY; 3089 } 3090 3091 public int getPositionXOnScreen() { 3092 return mPositionXOnScreen; 3093 } 3094 3095 public int getPositionYOnScreen() { 3096 return mPositionYOnScreen; 3097 } 3098 3099 @Override 3100 public boolean onPreDraw() { 3101 updatePosition(); 3102 3103 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3104 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3105 TextViewPositionListener positionListener = mPositionListeners[i]; 3106 if (positionListener != null) { 3107 positionListener.updatePosition(mPositionX, mPositionY, 3108 mPositionHasChanged, mScrollHasChanged); 3109 } 3110 } 3111 } 3112 3113 mScrollHasChanged = false; 3114 return true; 3115 } 3116 3117 private void updatePosition() { 3118 mTextView.getLocationInWindow(mTempCoords); 3119 3120 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3121 3122 mPositionX = mTempCoords[0]; 3123 mPositionY = mTempCoords[1]; 3124 3125 mTextView.getLocationOnScreen(mTempCoords); 3126 3127 mPositionXOnScreen = mTempCoords[0]; 3128 mPositionYOnScreen = mTempCoords[1]; 3129 } 3130 3131 public void onScrollChanged() { 3132 mScrollHasChanged = true; 3133 } 3134 } 3135 3136 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3137 protected PopupWindow mPopupWindow; 3138 protected ViewGroup mContentView; 3139 int mPositionX, mPositionY; 3140 int mClippingLimitLeft, mClippingLimitRight; 3141 3142 protected abstract void createPopupWindow(); 3143 protected abstract void initContentView(); 3144 protected abstract int getTextOffset(); 3145 protected abstract int getVerticalLocalPosition(int line); 3146 protected abstract int clipVertically(int positionY); 3147 protected void setUp() { 3148 } 3149 3150 public PinnedPopupWindow() { 3151 // Due to calling subclass methods in base constructor, subclass constructor is not 3152 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3153 // a chance to initialize subclasses, call setUp() method here. 3154 // TODO: It is good to extract non trivial initialization code from constructor. 3155 setUp(); 3156 3157 createPopupWindow(); 3158 3159 mPopupWindow.setWindowLayoutType( 3160 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3161 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3162 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3163 3164 initContentView(); 3165 3166 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3167 ViewGroup.LayoutParams.WRAP_CONTENT); 3168 mContentView.setLayoutParams(wrapContent); 3169 3170 mPopupWindow.setContentView(mContentView); 3171 } 3172 3173 public void show() { 3174 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3175 3176 computeLocalPosition(); 3177 3178 final PositionListener positionListener = getPositionListener(); 3179 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3180 } 3181 3182 protected void measureContent() { 3183 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3184 mContentView.measure( 3185 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3186 View.MeasureSpec.AT_MOST), 3187 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3188 View.MeasureSpec.AT_MOST)); 3189 } 3190 3191 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3192 * positioned according to viewportToContentHorizontalOffset. 3193 * 3194 * This method assumes that mContentView has properly been measured from its content. */ 3195 private void computeLocalPosition() { 3196 measureContent(); 3197 final int width = mContentView.getMeasuredWidth(); 3198 final int offset = getTextOffset(); 3199 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3200 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3201 3202 final int line = mTextView.getLayout().getLineForOffset(offset); 3203 mPositionY = getVerticalLocalPosition(line); 3204 mPositionY += mTextView.viewportToContentVerticalOffset(); 3205 } 3206 3207 private void updatePosition(int parentPositionX, int parentPositionY) { 3208 int positionX = parentPositionX + mPositionX; 3209 int positionY = parentPositionY + mPositionY; 3210 3211 positionY = clipVertically(positionY); 3212 3213 // Horizontal clipping 3214 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3215 final int width = mContentView.getMeasuredWidth(); 3216 positionX = Math.min( 3217 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3218 positionX = Math.max(-mClippingLimitLeft, positionX); 3219 3220 if (isShowing()) { 3221 mPopupWindow.update(positionX, positionY, -1, -1); 3222 } else { 3223 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3224 positionX, positionY); 3225 } 3226 } 3227 3228 public void hide() { 3229 if (!isShowing()) { 3230 return; 3231 } 3232 mPopupWindow.dismiss(); 3233 getPositionListener().removeSubscriber(this); 3234 } 3235 3236 @Override 3237 public void updatePosition(int parentPositionX, int parentPositionY, 3238 boolean parentPositionChanged, boolean parentScrolled) { 3239 // Either parentPositionChanged or parentScrolled is true, check if still visible 3240 if (isShowing() && isOffsetVisible(getTextOffset())) { 3241 if (parentScrolled) computeLocalPosition(); 3242 updatePosition(parentPositionX, parentPositionY); 3243 } else { 3244 hide(); 3245 } 3246 } 3247 3248 public boolean isShowing() { 3249 return mPopupWindow.isShowing(); 3250 } 3251 } 3252 3253 private static final class SuggestionInfo { 3254 // Range of actual suggestion within mText 3255 int mSuggestionStart, mSuggestionEnd; 3256 3257 // The SuggestionSpan that this TextView represents 3258 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3259 3260 // The index of this suggestion inside suggestionSpan 3261 int mSuggestionIndex; 3262 3263 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3264 3265 void clear() { 3266 mSuggestionSpanInfo.clear(); 3267 mText.clear(); 3268 } 3269 3270 // Utility method to set attributes about a SuggestionSpan. 3271 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3272 mSuggestionSpanInfo.mSuggestionSpan = span; 3273 mSuggestionSpanInfo.mSpanStart = spanStart; 3274 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3275 } 3276 } 3277 3278 private static final class SuggestionSpanInfo { 3279 // The SuggestionSpan; 3280 @Nullable 3281 SuggestionSpan mSuggestionSpan; 3282 3283 // The SuggestionSpan start position 3284 int mSpanStart; 3285 3286 // The SuggestionSpan end position 3287 int mSpanEnd; 3288 3289 void clear() { 3290 mSuggestionSpan = null; 3291 } 3292 } 3293 3294 private class SuggestionHelper { 3295 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3296 new SuggestionSpanComparator(); 3297 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3298 new HashMap<SuggestionSpan, Integer>(); 3299 3300 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3301 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3302 final int flag1 = span1.getFlags(); 3303 final int flag2 = span2.getFlags(); 3304 if (flag1 != flag2) { 3305 // The order here should match what is used in updateDrawState 3306 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3307 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3308 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3309 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3310 if (easy1 && !misspelled1) return -1; 3311 if (easy2 && !misspelled2) return 1; 3312 if (misspelled1) return -1; 3313 if (misspelled2) return 1; 3314 } 3315 3316 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3317 } 3318 } 3319 3320 /** 3321 * Returns the suggestion spans that cover the current cursor position. The suggestion 3322 * spans are sorted according to the length of text that they are attached to. 3323 */ 3324 private SuggestionSpan[] getSortedSuggestionSpans() { 3325 int pos = mTextView.getSelectionStart(); 3326 Spannable spannable = (Spannable) mTextView.getText(); 3327 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3328 3329 mSpansLengths.clear(); 3330 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3331 int start = spannable.getSpanStart(suggestionSpan); 3332 int end = spannable.getSpanEnd(suggestionSpan); 3333 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3334 } 3335 3336 // The suggestions are sorted according to their types (easy correction first, then 3337 // misspelled) and to the length of the text that they cover (shorter first). 3338 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3339 mSpansLengths.clear(); 3340 3341 return suggestionSpans; 3342 } 3343 3344 /** 3345 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3346 * position. 3347 * 3348 * @param suggestionInfos SuggestionInfo array the results will be set. 3349 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3350 * @return the number of suggestions actually fetched. 3351 */ 3352 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3353 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3354 final Spannable spannable = (Spannable) mTextView.getText(); 3355 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3356 final int nbSpans = suggestionSpans.length; 3357 if (nbSpans == 0) return 0; 3358 3359 int numberOfSuggestions = 0; 3360 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3361 final int spanStart = spannable.getSpanStart(suggestionSpan); 3362 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3363 3364 if (misspelledSpanInfo != null 3365 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3366 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3367 misspelledSpanInfo.mSpanStart = spanStart; 3368 misspelledSpanInfo.mSpanEnd = spanEnd; 3369 } 3370 3371 final String[] suggestions = suggestionSpan.getSuggestions(); 3372 final int nbSuggestions = suggestions.length; 3373 suggestionLoop: 3374 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3375 final String suggestion = suggestions[suggestionIndex]; 3376 for (int i = 0; i < numberOfSuggestions; i++) { 3377 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3378 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3379 final int otherSpanStart = 3380 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3381 final int otherSpanEnd = 3382 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3383 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3384 continue suggestionLoop; 3385 } 3386 } 3387 } 3388 3389 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3390 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3391 suggestionInfo.mSuggestionIndex = suggestionIndex; 3392 suggestionInfo.mSuggestionStart = 0; 3393 suggestionInfo.mSuggestionEnd = suggestion.length(); 3394 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3395 numberOfSuggestions++; 3396 if (numberOfSuggestions >= suggestionInfos.length) { 3397 return numberOfSuggestions; 3398 } 3399 } 3400 } 3401 return numberOfSuggestions; 3402 } 3403 } 3404 3405 @VisibleForTesting 3406 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3407 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3408 3409 // Key of intent extras for inserting new word into user dictionary. 3410 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3411 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3412 3413 private SuggestionInfo[] mSuggestionInfos; 3414 private int mNumberOfSuggestions; 3415 private boolean mCursorWasVisibleBeforeSuggestions; 3416 private boolean mIsShowingUp = false; 3417 private SuggestionAdapter mSuggestionsAdapter; 3418 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3419 private TextView mAddToDictionaryButton; 3420 private TextView mDeleteButton; 3421 private ListView mSuggestionListView; 3422 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3423 private int mContainerMarginWidth; 3424 private int mContainerMarginTop; 3425 private LinearLayout mContainerView; 3426 private Context mContext; // TODO: Make mContext final. 3427 3428 private class CustomPopupWindow extends PopupWindow { 3429 3430 @Override 3431 public void dismiss() { 3432 if (!isShowing()) { 3433 return; 3434 } 3435 super.dismiss(); 3436 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3437 3438 // Safe cast since show() checks that mTextView.getText() is an Editable 3439 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3440 3441 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3442 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3443 getInsertionController().show(); 3444 } 3445 } 3446 } 3447 3448 public SuggestionsPopupWindow() { 3449 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3450 } 3451 3452 @Override 3453 protected void setUp() { 3454 mContext = applyDefaultTheme(mTextView.getContext()); 3455 mHighlightSpan = new TextAppearanceSpan(mContext, 3456 mTextView.mTextEditSuggestionHighlightStyle); 3457 } 3458 3459 private Context applyDefaultTheme(Context originalContext) { 3460 TypedArray a = originalContext.obtainStyledAttributes( 3461 new int[]{com.android.internal.R.attr.isLightTheme}); 3462 boolean isLightTheme = a.getBoolean(0, true); 3463 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3464 : R.style.ThemeOverlay_Material_Dark; 3465 a.recycle(); 3466 return new ContextThemeWrapper(originalContext, themeId); 3467 } 3468 3469 @Override 3470 protected void createPopupWindow() { 3471 mPopupWindow = new CustomPopupWindow(); 3472 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3473 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3474 mPopupWindow.setFocusable(true); 3475 mPopupWindow.setClippingEnabled(false); 3476 } 3477 3478 @Override 3479 protected void initContentView() { 3480 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3481 Context.LAYOUT_INFLATER_SERVICE); 3482 mContentView = (ViewGroup) inflater.inflate( 3483 mTextView.mTextEditSuggestionContainerLayout, null); 3484 3485 mContainerView = (LinearLayout) mContentView.findViewById( 3486 com.android.internal.R.id.suggestionWindowContainer); 3487 ViewGroup.MarginLayoutParams lp = 3488 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3489 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3490 mContainerMarginTop = lp.topMargin; 3491 mClippingLimitLeft = lp.leftMargin; 3492 mClippingLimitRight = lp.rightMargin; 3493 3494 mSuggestionListView = (ListView) mContentView.findViewById( 3495 com.android.internal.R.id.suggestionContainer); 3496 3497 mSuggestionsAdapter = new SuggestionAdapter(); 3498 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3499 mSuggestionListView.setOnItemClickListener(this); 3500 3501 // Inflate the suggestion items once and for all. 3502 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3503 for (int i = 0; i < mSuggestionInfos.length; i++) { 3504 mSuggestionInfos[i] = new SuggestionInfo(); 3505 } 3506 3507 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3508 com.android.internal.R.id.addToDictionaryButton); 3509 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3510 public void onClick(View v) { 3511 final SuggestionSpan misspelledSpan = 3512 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3513 if (misspelledSpan == null) { 3514 // Span has been removed. 3515 return; 3516 } 3517 final Editable editable = (Editable) mTextView.getText(); 3518 final int spanStart = editable.getSpanStart(misspelledSpan); 3519 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3520 if (spanStart < 0 || spanEnd <= spanStart) { 3521 return; 3522 } 3523 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3524 3525 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3526 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3527 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3528 mTextView.getTextServicesLocale().toString()); 3529 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3530 mTextView.getContext().startActivity(intent); 3531 // There is no way to know if the word was indeed added. Re-check. 3532 // TODO The ExtractEditText should remove the span in the original text instead 3533 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3534 Selection.setSelection(editable, spanEnd); 3535 updateSpellCheckSpans(spanStart, spanEnd, false); 3536 hideWithCleanUp(); 3537 } 3538 }); 3539 3540 mDeleteButton = (TextView) mContentView.findViewById( 3541 com.android.internal.R.id.deleteButton); 3542 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3543 public void onClick(View v) { 3544 final Editable editable = (Editable) mTextView.getText(); 3545 3546 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3547 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3548 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3549 // Do not leave two adjacent spaces after deletion, or one at beginning of 3550 // text 3551 if (spanUnionEnd < editable.length() 3552 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3553 && (spanUnionStart == 0 3554 || Character.isSpaceChar( 3555 editable.charAt(spanUnionStart - 1)))) { 3556 spanUnionEnd = spanUnionEnd + 1; 3557 } 3558 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3559 } 3560 hideWithCleanUp(); 3561 } 3562 }); 3563 3564 } 3565 3566 public boolean isShowingUp() { 3567 return mIsShowingUp; 3568 } 3569 3570 public void onParentLostFocus() { 3571 mIsShowingUp = false; 3572 } 3573 3574 private class SuggestionAdapter extends BaseAdapter { 3575 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3576 Context.LAYOUT_INFLATER_SERVICE); 3577 3578 @Override 3579 public int getCount() { 3580 return mNumberOfSuggestions; 3581 } 3582 3583 @Override 3584 public Object getItem(int position) { 3585 return mSuggestionInfos[position]; 3586 } 3587 3588 @Override 3589 public long getItemId(int position) { 3590 return position; 3591 } 3592 3593 @Override 3594 public View getView(int position, View convertView, ViewGroup parent) { 3595 TextView textView = (TextView) convertView; 3596 3597 if (textView == null) { 3598 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3599 parent, false); 3600 } 3601 3602 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3603 textView.setText(suggestionInfo.mText); 3604 return textView; 3605 } 3606 } 3607 3608 @VisibleForTesting 3609 public ViewGroup getContentViewForTesting() { 3610 return mContentView; 3611 } 3612 3613 @Override 3614 public void show() { 3615 if (!(mTextView.getText() instanceof Editable)) return; 3616 if (extractedTextModeWillBeStarted()) { 3617 return; 3618 } 3619 3620 if (updateSuggestions()) { 3621 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3622 mTextView.setCursorVisible(false); 3623 mIsShowingUp = true; 3624 super.show(); 3625 } 3626 } 3627 3628 @Override 3629 protected void measureContent() { 3630 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3631 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3632 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3633 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3634 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3635 3636 int width = 0; 3637 View view = null; 3638 for (int i = 0; i < mNumberOfSuggestions; i++) { 3639 view = mSuggestionsAdapter.getView(i, view, mContentView); 3640 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3641 view.measure(horizontalMeasure, verticalMeasure); 3642 width = Math.max(width, view.getMeasuredWidth()); 3643 } 3644 3645 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3646 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3647 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3648 } 3649 3650 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3651 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3652 3653 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3654 + mContainerMarginWidth; 3655 3656 // Enforce the width based on actual text widths 3657 mContentView.measure( 3658 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3659 verticalMeasure); 3660 3661 Drawable popupBackground = mPopupWindow.getBackground(); 3662 if (popupBackground != null) { 3663 if (mTempRect == null) mTempRect = new Rect(); 3664 popupBackground.getPadding(mTempRect); 3665 width += mTempRect.left + mTempRect.right; 3666 } 3667 mPopupWindow.setWidth(width); 3668 } 3669 3670 @Override 3671 protected int getTextOffset() { 3672 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3673 } 3674 3675 @Override 3676 protected int getVerticalLocalPosition(int line) { 3677 final Layout layout = mTextView.getLayout(); 3678 return layout.getLineBottomWithoutSpacing(line) - mContainerMarginTop; 3679 } 3680 3681 @Override 3682 protected int clipVertically(int positionY) { 3683 final int height = mContentView.getMeasuredHeight(); 3684 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3685 return Math.min(positionY, displayMetrics.heightPixels - height); 3686 } 3687 3688 private void hideWithCleanUp() { 3689 for (final SuggestionInfo info : mSuggestionInfos) { 3690 info.clear(); 3691 } 3692 mMisspelledSpanInfo.clear(); 3693 hide(); 3694 } 3695 3696 private boolean updateSuggestions() { 3697 Spannable spannable = (Spannable) mTextView.getText(); 3698 mNumberOfSuggestions = 3699 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3700 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3701 return false; 3702 } 3703 3704 int spanUnionStart = mTextView.getText().length(); 3705 int spanUnionEnd = 0; 3706 3707 for (int i = 0; i < mNumberOfSuggestions; i++) { 3708 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3709 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3710 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3711 } 3712 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3713 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3714 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3715 } 3716 3717 for (int i = 0; i < mNumberOfSuggestions; i++) { 3718 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3719 } 3720 3721 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3722 int addToDictionaryButtonVisibility = View.GONE; 3723 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3724 if (mMisspelledSpanInfo.mSpanStart >= 0 3725 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3726 addToDictionaryButtonVisibility = View.VISIBLE; 3727 } 3728 } 3729 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3730 3731 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3732 final int underlineColor; 3733 if (mNumberOfSuggestions != 0) { 3734 underlineColor = 3735 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3736 } else { 3737 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3738 } 3739 3740 if (underlineColor == 0) { 3741 // Fallback on the default highlight color when the first span does not provide one 3742 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3743 } else { 3744 final float BACKGROUND_TRANSPARENCY = 0.4f; 3745 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3746 mSuggestionRangeSpan.setBackgroundColor( 3747 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3748 } 3749 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3750 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3751 3752 mSuggestionsAdapter.notifyDataSetChanged(); 3753 return true; 3754 } 3755 3756 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3757 int unionEnd) { 3758 final Spannable text = (Spannable) mTextView.getText(); 3759 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3760 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3761 3762 // Adjust the start/end of the suggestion span 3763 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3764 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3765 + suggestionInfo.mText.length(); 3766 3767 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3768 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3769 3770 // Add the text before and after the span. 3771 final String textAsString = text.toString(); 3772 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3773 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3774 } 3775 3776 @Override 3777 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3778 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3779 replaceWithSuggestion(suggestionInfo); 3780 hideWithCleanUp(); 3781 } 3782 } 3783 3784 /** 3785 * An ActionMode Callback class that is used to provide actions while in text insertion or 3786 * selection mode. 3787 * 3788 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3789 * actions, depending on which of these this TextView supports and the current selection. 3790 */ 3791 private class TextActionModeCallback extends ActionMode.Callback2 { 3792 private final Path mSelectionPath = new Path(); 3793 private final RectF mSelectionBounds = new RectF(); 3794 private final boolean mHasSelection; 3795 private final int mHandleHeight; 3796 3797 public TextActionModeCallback(boolean hasSelection) { 3798 mHasSelection = hasSelection; 3799 if (mHasSelection) { 3800 SelectionModifierCursorController selectionController = getSelectionController(); 3801 if (selectionController.mStartHandle == null) { 3802 // As these are for initializing selectionController, hide() must be called. 3803 selectionController.initDrawables(); 3804 selectionController.initHandles(); 3805 selectionController.hide(); 3806 } 3807 mHandleHeight = Math.max( 3808 mSelectHandleLeft.getMinimumHeight(), 3809 mSelectHandleRight.getMinimumHeight()); 3810 } else { 3811 InsertionPointCursorController insertionController = getInsertionController(); 3812 if (insertionController != null) { 3813 insertionController.getHandle(); 3814 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3815 } else { 3816 mHandleHeight = 0; 3817 } 3818 } 3819 } 3820 3821 @Override 3822 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3823 mode.setTitle(null); 3824 mode.setSubtitle(null); 3825 mode.setTitleOptionalHint(true); 3826 populateMenuWithItems(menu); 3827 3828 Callback customCallback = getCustomCallback(); 3829 if (customCallback != null) { 3830 if (!customCallback.onCreateActionMode(mode, menu)) { 3831 // The custom mode can choose to cancel the action mode, dismiss selection. 3832 Selection.setSelection((Spannable) mTextView.getText(), 3833 mTextView.getSelectionEnd()); 3834 return false; 3835 } 3836 } 3837 3838 if (mTextView.canProcessText()) { 3839 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3840 } 3841 3842 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3843 if (mHasSelection && !mTextView.hasTransientState()) { 3844 mTextView.setHasTransientState(true); 3845 } 3846 return true; 3847 } else { 3848 return false; 3849 } 3850 } 3851 3852 private Callback getCustomCallback() { 3853 return mHasSelection 3854 ? mCustomSelectionActionModeCallback 3855 : mCustomInsertionActionModeCallback; 3856 } 3857 3858 private void populateMenuWithItems(Menu menu) { 3859 if (mTextView.canCut()) { 3860 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3861 com.android.internal.R.string.cut) 3862 .setAlphabeticShortcut('x') 3863 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3864 } 3865 3866 if (mTextView.canCopy()) { 3867 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3868 com.android.internal.R.string.copy) 3869 .setAlphabeticShortcut('c') 3870 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3871 } 3872 3873 if (mTextView.canPaste()) { 3874 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3875 com.android.internal.R.string.paste) 3876 .setAlphabeticShortcut('v') 3877 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3878 } 3879 3880 if (mTextView.canShare()) { 3881 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3882 com.android.internal.R.string.share) 3883 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3884 } 3885 3886 if (mTextView.canRequestAutofill()) { 3887 final String selected = mTextView.getSelectedText(); 3888 if (selected == null || selected.isEmpty()) { 3889 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3890 com.android.internal.R.string.autofill) 3891 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 3892 } 3893 } 3894 3895 if (mTextView.canPasteAsPlainText()) { 3896 menu.add( 3897 Menu.NONE, 3898 TextView.ID_PASTE_AS_PLAIN_TEXT, 3899 MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 3900 com.android.internal.R.string.paste_as_plain_text) 3901 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3902 } 3903 3904 updateSelectAllItem(menu); 3905 updateReplaceItem(menu); 3906 updateAssistMenuItem(menu); 3907 } 3908 3909 @Override 3910 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3911 updateSelectAllItem(menu); 3912 updateReplaceItem(menu); 3913 updateAssistMenuItem(menu); 3914 3915 Callback customCallback = getCustomCallback(); 3916 if (customCallback != null) { 3917 return customCallback.onPrepareActionMode(mode, menu); 3918 } 3919 return true; 3920 } 3921 3922 private void updateSelectAllItem(Menu menu) { 3923 boolean canSelectAll = mTextView.canSelectAllText(); 3924 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3925 if (canSelectAll && !selectAllItemExists) { 3926 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3927 com.android.internal.R.string.selectAll) 3928 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3929 } else if (!canSelectAll && selectAllItemExists) { 3930 menu.removeItem(TextView.ID_SELECT_ALL); 3931 } 3932 } 3933 3934 private void updateReplaceItem(Menu menu) { 3935 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3936 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3937 if (canReplace && !replaceItemExists) { 3938 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3939 com.android.internal.R.string.replace) 3940 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3941 } else if (!canReplace && replaceItemExists) { 3942 menu.removeItem(TextView.ID_REPLACE); 3943 } 3944 } 3945 3946 private void updateAssistMenuItem(Menu menu) { 3947 menu.removeItem(TextView.ID_ASSIST); 3948 final TextClassification textClassification = 3949 getSelectionActionModeHelper().getTextClassification(); 3950 if (canAssist()) { 3951 menu.add(TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, 3952 textClassification.getLabel()) 3953 .setIcon(textClassification.getIcon()) 3954 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3955 mMetricsLogger.write( 3956 new LogMaker(MetricsEvent.TEXT_SELECTION_MENU_ITEM_ASSIST) 3957 .setType(MetricsEvent.TYPE_OPEN) 3958 .setSubtype(textClassification.getLogType())); 3959 } 3960 } 3961 3962 private boolean canAssist() { 3963 final TextClassification textClassification = 3964 getSelectionActionModeHelper().getTextClassification(); 3965 return mTextView.isDeviceProvisioned() 3966 && textClassification != null 3967 && (textClassification.getIcon() != null 3968 || !TextUtils.isEmpty(textClassification.getLabel())) 3969 && (textClassification.getOnClickListener() != null 3970 || (textClassification.getIntent() != null 3971 && mTextView.getContext().canStartActivityForResult())); 3972 } 3973 3974 @Override 3975 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3976 getSelectionActionModeHelper().onSelectionAction(item.getItemId()); 3977 3978 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3979 return true; 3980 } 3981 Callback customCallback = getCustomCallback(); 3982 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3983 return true; 3984 } 3985 final TextClassification textClassification = 3986 getSelectionActionModeHelper().getTextClassification(); 3987 if (TextView.ID_ASSIST == item.getItemId() && textClassification != null) { 3988 final OnClickListener onClickListener = 3989 textClassification.getOnClickListener(); 3990 if (onClickListener != null) { 3991 onClickListener.onClick(mTextView); 3992 } else { 3993 final Intent intent = textClassification.getIntent(); 3994 if (intent != null) { 3995 TextClassification.createStartActivityOnClickListener( 3996 mTextView.getContext(), intent) 3997 .onClick(mTextView); 3998 } 3999 } 4000 mMetricsLogger.action( 4001 MetricsEvent.ACTION_TEXT_SELECTION_MENU_ITEM_ASSIST, 4002 textClassification.getLogType()); 4003 stopTextActionMode(); 4004 return true; 4005 } 4006 return mTextView.onTextContextMenuItem(item.getItemId()); 4007 } 4008 4009 @Override 4010 public void onDestroyActionMode(ActionMode mode) { 4011 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 4012 getSelectionActionModeHelper().onDestroyActionMode(); 4013 mTextActionMode = null; 4014 Callback customCallback = getCustomCallback(); 4015 if (customCallback != null) { 4016 customCallback.onDestroyActionMode(mode); 4017 } 4018 4019 if (!mPreserveSelection) { 4020 /* 4021 * Leave current selection when we tentatively destroy action mode for the 4022 * selection. If we're detaching from a window, we'll bring back the selection 4023 * mode when (if) we get reattached. 4024 */ 4025 Selection.setSelection((Spannable) mTextView.getText(), 4026 mTextView.getSelectionEnd()); 4027 } 4028 4029 if (mSelectionModifierCursorController != null) { 4030 mSelectionModifierCursorController.hide(); 4031 } 4032 } 4033 4034 @Override 4035 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 4036 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 4037 super.onGetContentRect(mode, view, outRect); 4038 return; 4039 } 4040 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 4041 // We have a selection. 4042 mSelectionPath.reset(); 4043 mTextView.getLayout().getSelectionPath( 4044 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 4045 mSelectionPath.computeBounds(mSelectionBounds, true); 4046 mSelectionBounds.bottom += mHandleHeight; 4047 } else { 4048 // We have a cursor. 4049 Layout layout = mTextView.getLayout(); 4050 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 4051 float primaryHorizontal = clampHorizontalPosition(null, 4052 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 4053 mSelectionBounds.set( 4054 primaryHorizontal, 4055 layout.getLineTop(line), 4056 primaryHorizontal, 4057 layout.getLineBottom(line) - layout.getLineBottom(line) + mHandleHeight); 4058 } 4059 // Take TextView's padding and scroll into account. 4060 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4061 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4062 outRect.set( 4063 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4064 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4065 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4066 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4067 } 4068 } 4069 4070 /** 4071 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4072 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4073 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4074 */ 4075 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4076 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4077 final int[] mTmpIntOffset = new int[2]; 4078 final Matrix mViewToScreenMatrix = new Matrix(); 4079 4080 @Override 4081 public void updatePosition(int parentPositionX, int parentPositionY, 4082 boolean parentPositionChanged, boolean parentScrolled) { 4083 final InputMethodState ims = mInputMethodState; 4084 if (ims == null || ims.mBatchEditNesting > 0) { 4085 return; 4086 } 4087 final InputMethodManager imm = InputMethodManager.peekInstance(); 4088 if (null == imm) { 4089 return; 4090 } 4091 if (!imm.isActive(mTextView)) { 4092 return; 4093 } 4094 // Skip if the IME has not requested the cursor/anchor position. 4095 if (!imm.isCursorAnchorInfoEnabled()) { 4096 return; 4097 } 4098 Layout layout = mTextView.getLayout(); 4099 if (layout == null) { 4100 return; 4101 } 4102 4103 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4104 builder.reset(); 4105 4106 final int selectionStart = mTextView.getSelectionStart(); 4107 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4108 4109 // Construct transformation matrix from view local coordinates to screen coordinates. 4110 mViewToScreenMatrix.set(mTextView.getMatrix()); 4111 mTextView.getLocationOnScreen(mTmpIntOffset); 4112 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4113 builder.setMatrix(mViewToScreenMatrix); 4114 4115 final float viewportToContentHorizontalOffset = 4116 mTextView.viewportToContentHorizontalOffset(); 4117 final float viewportToContentVerticalOffset = 4118 mTextView.viewportToContentVerticalOffset(); 4119 4120 final CharSequence text = mTextView.getText(); 4121 if (text instanceof Spannable) { 4122 final Spannable sp = (Spannable) text; 4123 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4124 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4125 if (composingTextEnd < composingTextStart) { 4126 final int temp = composingTextEnd; 4127 composingTextEnd = composingTextStart; 4128 composingTextStart = temp; 4129 } 4130 final boolean hasComposingText = 4131 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4132 if (hasComposingText) { 4133 final CharSequence composingText = text.subSequence(composingTextStart, 4134 composingTextEnd); 4135 builder.setComposingText(composingTextStart, composingText); 4136 mTextView.populateCharacterBounds(builder, composingTextStart, 4137 composingTextEnd, viewportToContentHorizontalOffset, 4138 viewportToContentVerticalOffset); 4139 } 4140 } 4141 4142 // Treat selectionStart as the insertion point. 4143 if (0 <= selectionStart) { 4144 final int offset = selectionStart; 4145 final int line = layout.getLineForOffset(offset); 4146 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4147 + viewportToContentHorizontalOffset; 4148 final float insertionMarkerTop = layout.getLineTop(line) 4149 + viewportToContentVerticalOffset; 4150 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4151 + viewportToContentVerticalOffset; 4152 final float insertionMarkerBottom = layout.getLineBottomWithoutSpacing(line) 4153 + viewportToContentVerticalOffset; 4154 final boolean isTopVisible = mTextView 4155 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4156 final boolean isBottomVisible = mTextView 4157 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4158 int insertionMarkerFlags = 0; 4159 if (isTopVisible || isBottomVisible) { 4160 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4161 } 4162 if (!isTopVisible || !isBottomVisible) { 4163 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4164 } 4165 if (layout.isRtlCharAt(offset)) { 4166 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4167 } 4168 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4169 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4170 } 4171 4172 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4173 } 4174 } 4175 4176 @VisibleForTesting 4177 public abstract class HandleView extends View implements TextViewPositionListener { 4178 protected Drawable mDrawable; 4179 protected Drawable mDrawableLtr; 4180 protected Drawable mDrawableRtl; 4181 private final PopupWindow mContainer; 4182 // Position with respect to the parent TextView 4183 private int mPositionX, mPositionY; 4184 private boolean mIsDragging; 4185 // Offset from touch position to mPosition 4186 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4187 protected int mHotspotX; 4188 protected int mHorizontalGravity; 4189 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4190 private float mTouchOffsetY; 4191 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4192 private float mIdealVerticalOffset; 4193 // Parent's (TextView) previous position in window 4194 private int mLastParentX, mLastParentY; 4195 // Parent's (TextView) previous position on screen 4196 private int mLastParentXOnScreen, mLastParentYOnScreen; 4197 // Previous text character offset 4198 protected int mPreviousOffset = -1; 4199 // Previous text character offset 4200 private boolean mPositionHasChanged = true; 4201 // Minimum touch target size for handles 4202 private int mMinSize; 4203 // Indicates the line of text that the handle is on. 4204 protected int mPrevLine = UNSET_LINE; 4205 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4206 // when selecting text when the handles jump to the end / start of words which may be on 4207 // a different line. 4208 protected int mPreviousLineTouched = UNSET_LINE; 4209 4210 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4211 super(mTextView.getContext()); 4212 setId(id); 4213 mContainer = new PopupWindow(mTextView.getContext(), null, 4214 com.android.internal.R.attr.textSelectHandleWindowStyle); 4215 mContainer.setSplitTouchEnabled(true); 4216 mContainer.setClippingEnabled(false); 4217 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4218 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4219 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4220 mContainer.setContentView(this); 4221 4222 mDrawableLtr = drawableLtr; 4223 mDrawableRtl = drawableRtl; 4224 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4225 com.android.internal.R.dimen.text_handle_min_size); 4226 4227 updateDrawable(); 4228 4229 final int handleHeight = getPreferredHeight(); 4230 mTouchOffsetY = -0.3f * handleHeight; 4231 mIdealVerticalOffset = 0.7f * handleHeight; 4232 } 4233 4234 public float getIdealVerticalOffset() { 4235 return mIdealVerticalOffset; 4236 } 4237 4238 protected void updateDrawable() { 4239 if (mIsDragging) { 4240 // Don't update drawable during dragging. 4241 return; 4242 } 4243 final Layout layout = mTextView.getLayout(); 4244 if (layout == null) { 4245 return; 4246 } 4247 final int offset = getCurrentCursorOffset(); 4248 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4249 final Drawable oldDrawable = mDrawable; 4250 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4251 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4252 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4253 if (oldDrawable != mDrawable && isShowing()) { 4254 // Update popup window position. 4255 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4256 - getHorizontalOffset() + getCursorOffset(); 4257 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4258 mPositionHasChanged = true; 4259 updatePosition(mLastParentX, mLastParentY, false, false); 4260 postInvalidate(); 4261 } 4262 } 4263 4264 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4265 protected abstract int getHorizontalGravity(boolean isRtlRun); 4266 4267 // Touch-up filter: number of previous positions remembered 4268 private static final int HISTORY_SIZE = 5; 4269 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4270 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4271 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4272 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4273 private int mPreviousOffsetIndex = 0; 4274 private int mNumberPreviousOffsets = 0; 4275 4276 private void startTouchUpFilter(int offset) { 4277 mNumberPreviousOffsets = 0; 4278 addPositionToTouchUpFilter(offset); 4279 } 4280 4281 private void addPositionToTouchUpFilter(int offset) { 4282 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4283 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4284 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4285 mNumberPreviousOffsets++; 4286 } 4287 4288 private void filterOnTouchUp(boolean fromTouchScreen) { 4289 final long now = SystemClock.uptimeMillis(); 4290 int i = 0; 4291 int index = mPreviousOffsetIndex; 4292 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4293 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4294 i++; 4295 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4296 } 4297 4298 if (i > 0 && i < iMax 4299 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4300 positionAtCursorOffset(mPreviousOffsets[index], false, fromTouchScreen); 4301 } 4302 } 4303 4304 public boolean offsetHasBeenChanged() { 4305 return mNumberPreviousOffsets > 1; 4306 } 4307 4308 @Override 4309 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4310 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4311 } 4312 4313 @Override 4314 public void invalidate() { 4315 super.invalidate(); 4316 if (isShowing()) { 4317 positionAtCursorOffset(getCurrentCursorOffset(), true, false); 4318 } 4319 }; 4320 4321 private int getPreferredWidth() { 4322 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4323 } 4324 4325 private int getPreferredHeight() { 4326 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4327 } 4328 4329 public void show() { 4330 if (isShowing()) return; 4331 4332 getPositionListener().addSubscriber(this, true /* local position may change */); 4333 4334 // Make sure the offset is always considered new, even when focusing at same position 4335 mPreviousOffset = -1; 4336 positionAtCursorOffset(getCurrentCursorOffset(), false, false); 4337 } 4338 4339 protected void dismiss() { 4340 mIsDragging = false; 4341 mContainer.dismiss(); 4342 onDetached(); 4343 } 4344 4345 public void hide() { 4346 dismiss(); 4347 4348 getPositionListener().removeSubscriber(this); 4349 } 4350 4351 public boolean isShowing() { 4352 return mContainer.isShowing(); 4353 } 4354 4355 private boolean isVisible() { 4356 // Always show a dragging handle. 4357 if (mIsDragging) { 4358 return true; 4359 } 4360 4361 if (mTextView.isInBatchEditMode()) { 4362 return false; 4363 } 4364 4365 return mTextView.isPositionVisible( 4366 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4367 } 4368 4369 public abstract int getCurrentCursorOffset(); 4370 4371 protected abstract void updateSelection(int offset); 4372 4373 protected abstract void updatePosition(float x, float y, boolean fromTouchScreen); 4374 4375 @MagnifierHandleTrigger 4376 protected abstract int getMagnifierHandleTrigger(); 4377 4378 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4379 return layout.isRtlCharAt(offset); 4380 } 4381 4382 @VisibleForTesting 4383 public float getHorizontal(@NonNull Layout layout, int offset) { 4384 return layout.getPrimaryHorizontal(offset); 4385 } 4386 4387 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4388 return mTextView.getOffsetAtCoordinate(line, x); 4389 } 4390 4391 /** 4392 * @param offset Cursor offset. Must be in [-1, length]. 4393 * @param forceUpdatePosition whether to force update the position. This should be true 4394 * when If the parent has been scrolled, for example. 4395 * @param fromTouchScreen {@code true} if the cursor is moved with motion events from the 4396 * touch screen. 4397 */ 4398 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4399 boolean fromTouchScreen) { 4400 // A HandleView relies on the layout, which may be nulled by external methods 4401 Layout layout = mTextView.getLayout(); 4402 if (layout == null) { 4403 // Will update controllers' state, hiding them and stopping selection mode if needed 4404 prepareCursorControllers(); 4405 return; 4406 } 4407 layout = mTextView.getLayout(); 4408 4409 boolean offsetChanged = offset != mPreviousOffset; 4410 if (offsetChanged || forceUpdatePosition) { 4411 if (offsetChanged) { 4412 updateSelection(offset); 4413 if (fromTouchScreen && mHapticTextHandleEnabled) { 4414 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 4415 } 4416 addPositionToTouchUpFilter(offset); 4417 } 4418 final int line = layout.getLineForOffset(offset); 4419 mPrevLine = line; 4420 4421 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4422 - getHorizontalOffset() + getCursorOffset(); 4423 mPositionY = layout.getLineBottomWithoutSpacing(line); 4424 4425 // Take TextView's padding and scroll into account. 4426 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4427 mPositionY += mTextView.viewportToContentVerticalOffset(); 4428 4429 mPreviousOffset = offset; 4430 mPositionHasChanged = true; 4431 } 4432 } 4433 4434 /** 4435 * Return the clamped horizontal position for the cursor. 4436 * 4437 * @param layout Text layout. 4438 * @param offset Character offset for the cursor. 4439 * @return The clamped horizontal position for the cursor. 4440 */ 4441 int getCursorHorizontalPosition(Layout layout, int offset) { 4442 return (int) (getHorizontal(layout, offset) - 0.5f); 4443 } 4444 4445 @Override 4446 public void updatePosition(int parentPositionX, int parentPositionY, 4447 boolean parentPositionChanged, boolean parentScrolled) { 4448 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled, false); 4449 if (parentPositionChanged || mPositionHasChanged) { 4450 if (mIsDragging) { 4451 // Update touchToWindow offset in case of parent scrolling while dragging 4452 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4453 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4454 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4455 mLastParentX = parentPositionX; 4456 mLastParentY = parentPositionY; 4457 } 4458 4459 onHandleMoved(); 4460 } 4461 4462 if (isVisible()) { 4463 // Transform to the window coordinates to follow the view tranformation. 4464 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4465 mTextView.transformFromViewToWindowSpace(pts); 4466 pts[0] -= mHotspotX + getHorizontalOffset(); 4467 4468 if (isShowing()) { 4469 mContainer.update(pts[0], pts[1], -1, -1); 4470 } else { 4471 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4472 } 4473 } else { 4474 if (isShowing()) { 4475 dismiss(); 4476 } 4477 } 4478 4479 mPositionHasChanged = false; 4480 } 4481 } 4482 4483 @Override 4484 protected void onDraw(Canvas c) { 4485 final int drawWidth = mDrawable.getIntrinsicWidth(); 4486 final int left = getHorizontalOffset(); 4487 4488 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4489 mDrawable.draw(c); 4490 } 4491 4492 private int getHorizontalOffset() { 4493 final int width = getPreferredWidth(); 4494 final int drawWidth = mDrawable.getIntrinsicWidth(); 4495 final int left; 4496 switch (mHorizontalGravity) { 4497 case Gravity.LEFT: 4498 left = 0; 4499 break; 4500 default: 4501 case Gravity.CENTER: 4502 left = (width - drawWidth) / 2; 4503 break; 4504 case Gravity.RIGHT: 4505 left = width - drawWidth; 4506 break; 4507 } 4508 return left; 4509 } 4510 4511 protected int getCursorOffset() { 4512 return 0; 4513 } 4514 4515 protected final void showMagnifier() { 4516 if (mMagnifier == null) { 4517 return; 4518 } 4519 4520 final int trigger = getMagnifierHandleTrigger(); 4521 final int offset; 4522 switch (trigger) { 4523 case MagnifierHandleTrigger.INSERTION: // Fall through. 4524 case MagnifierHandleTrigger.SELECTION_START: 4525 offset = mTextView.getSelectionStart(); 4526 break; 4527 case MagnifierHandleTrigger.SELECTION_END: 4528 offset = mTextView.getSelectionEnd(); 4529 break; 4530 default: 4531 offset = -1; 4532 break; 4533 } 4534 4535 if (offset == -1) { 4536 dismissMagnifier(); 4537 } 4538 4539 final Layout layout = mTextView.getLayout(); 4540 final int lineNumber = layout.getLineForOffset(offset); 4541 // Horizontally snap to character offset. 4542 final float xPosInView = getHorizontal(mTextView.getLayout(), offset) 4543 + mTextView.getTotalPaddingLeft() - mTextView.getScrollX(); 4544 // Vertically snap to middle of current line. 4545 final float yPosInView = (mTextView.getLayout().getLineTop(lineNumber) 4546 + mTextView.getLayout().getLineBottom(lineNumber)) / 2.0f 4547 + mTextView.getTotalPaddingTop() - mTextView.getScrollY(); 4548 4549 suspendBlink(); 4550 mMagnifier.show(xPosInView, yPosInView, MAGNIFIER_ZOOM); 4551 } 4552 4553 protected final void dismissMagnifier() { 4554 if (mMagnifier != null) { 4555 mMagnifier.dismiss(); 4556 resumeBlink(); 4557 } 4558 } 4559 4560 @Override 4561 public boolean onTouchEvent(MotionEvent ev) { 4562 updateFloatingToolbarVisibility(ev); 4563 4564 switch (ev.getActionMasked()) { 4565 case MotionEvent.ACTION_DOWN: { 4566 startTouchUpFilter(getCurrentCursorOffset()); 4567 4568 final PositionListener positionListener = getPositionListener(); 4569 mLastParentX = positionListener.getPositionX(); 4570 mLastParentY = positionListener.getPositionY(); 4571 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4572 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4573 4574 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4575 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4576 mTouchToWindowOffsetX = xInWindow - mPositionX; 4577 mTouchToWindowOffsetY = yInWindow - mPositionY; 4578 4579 mIsDragging = true; 4580 mPreviousLineTouched = UNSET_LINE; 4581 break; 4582 } 4583 4584 case MotionEvent.ACTION_MOVE: { 4585 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4586 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4587 4588 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4589 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4590 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4591 float newVerticalOffset; 4592 if (previousVerticalOffset < mIdealVerticalOffset) { 4593 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4594 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4595 } else { 4596 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4597 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4598 } 4599 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4600 4601 final float newPosX = 4602 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4603 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4604 4605 updatePosition(newPosX, newPosY, 4606 ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4607 break; 4608 } 4609 4610 case MotionEvent.ACTION_UP: 4611 filterOnTouchUp(ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4612 // Fall through. 4613 case MotionEvent.ACTION_CANCEL: 4614 mIsDragging = false; 4615 updateDrawable(); 4616 break; 4617 } 4618 return true; 4619 } 4620 4621 public boolean isDragging() { 4622 return mIsDragging; 4623 } 4624 4625 void onHandleMoved() {} 4626 4627 public void onDetached() {} 4628 } 4629 4630 private class InsertionHandleView extends HandleView { 4631 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4632 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4633 4634 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4635 private float mDownPositionX, mDownPositionY; 4636 private Runnable mHider; 4637 4638 public InsertionHandleView(Drawable drawable) { 4639 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4640 } 4641 4642 @Override 4643 public void show() { 4644 super.show(); 4645 4646 final long durationSinceCutOrCopy = 4647 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4648 4649 // Cancel the single tap delayed runnable. 4650 if (mInsertionActionModeRunnable != null 4651 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4652 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4653 || isCursorInsideEasyCorrectionSpan())) { 4654 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4655 } 4656 4657 // Prepare and schedule the single tap runnable to run exactly after the double tap 4658 // timeout has passed. 4659 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4660 && !isCursorInsideEasyCorrectionSpan() 4661 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4662 if (mTextActionMode == null) { 4663 if (mInsertionActionModeRunnable == null) { 4664 mInsertionActionModeRunnable = new Runnable() { 4665 @Override 4666 public void run() { 4667 startInsertionActionMode(); 4668 } 4669 }; 4670 } 4671 mTextView.postDelayed( 4672 mInsertionActionModeRunnable, 4673 ViewConfiguration.getDoubleTapTimeout() + 1); 4674 } 4675 4676 } 4677 4678 hideAfterDelay(); 4679 } 4680 4681 private void hideAfterDelay() { 4682 if (mHider == null) { 4683 mHider = new Runnable() { 4684 public void run() { 4685 hide(); 4686 } 4687 }; 4688 } else { 4689 removeHiderCallback(); 4690 } 4691 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4692 } 4693 4694 private void removeHiderCallback() { 4695 if (mHider != null) { 4696 mTextView.removeCallbacks(mHider); 4697 } 4698 } 4699 4700 @Override 4701 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4702 return drawable.getIntrinsicWidth() / 2; 4703 } 4704 4705 @Override 4706 protected int getHorizontalGravity(boolean isRtlRun) { 4707 return Gravity.CENTER_HORIZONTAL; 4708 } 4709 4710 @Override 4711 protected int getCursorOffset() { 4712 int offset = super.getCursorOffset(); 4713 if (mDrawableForCursor != null) { 4714 mDrawableForCursor.getPadding(mTempRect); 4715 offset += (mDrawableForCursor.getIntrinsicWidth() 4716 - mTempRect.left - mTempRect.right) / 2; 4717 } 4718 return offset; 4719 } 4720 4721 @Override 4722 int getCursorHorizontalPosition(Layout layout, int offset) { 4723 if (mDrawableForCursor != null) { 4724 final float horizontal = getHorizontal(layout, offset); 4725 return clampHorizontalPosition(mDrawableForCursor, horizontal) + mTempRect.left; 4726 } 4727 return super.getCursorHorizontalPosition(layout, offset); 4728 } 4729 4730 @Override 4731 public boolean onTouchEvent(MotionEvent ev) { 4732 final boolean result = super.onTouchEvent(ev); 4733 4734 switch (ev.getActionMasked()) { 4735 case MotionEvent.ACTION_DOWN: 4736 mDownPositionX = ev.getRawX(); 4737 mDownPositionY = ev.getRawY(); 4738 showMagnifier(); 4739 break; 4740 4741 case MotionEvent.ACTION_MOVE: 4742 showMagnifier(); 4743 break; 4744 4745 case MotionEvent.ACTION_UP: 4746 if (!offsetHasBeenChanged()) { 4747 final float deltaX = mDownPositionX - ev.getRawX(); 4748 final float deltaY = mDownPositionY - ev.getRawY(); 4749 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4750 4751 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4752 mTextView.getContext()); 4753 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4754 4755 if (distanceSquared < touchSlop * touchSlop) { 4756 // Tapping on the handle toggles the insertion action mode. 4757 if (mTextActionMode != null) { 4758 stopTextActionMode(); 4759 } else { 4760 startInsertionActionMode(); 4761 } 4762 } 4763 } else { 4764 if (mTextActionMode != null) { 4765 mTextActionMode.invalidateContentRect(); 4766 } 4767 } 4768 // Fall through. 4769 case MotionEvent.ACTION_CANCEL: 4770 hideAfterDelay(); 4771 dismissMagnifier(); 4772 break; 4773 4774 default: 4775 break; 4776 } 4777 4778 return result; 4779 } 4780 4781 @Override 4782 public int getCurrentCursorOffset() { 4783 return mTextView.getSelectionStart(); 4784 } 4785 4786 @Override 4787 public void updateSelection(int offset) { 4788 Selection.setSelection((Spannable) mTextView.getText(), offset); 4789 } 4790 4791 @Override 4792 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4793 Layout layout = mTextView.getLayout(); 4794 int offset; 4795 if (layout != null) { 4796 if (mPreviousLineTouched == UNSET_LINE) { 4797 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4798 } 4799 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4800 offset = getOffsetAtCoordinate(layout, currLine, x); 4801 mPreviousLineTouched = currLine; 4802 } else { 4803 offset = -1; 4804 } 4805 positionAtCursorOffset(offset, false, fromTouchScreen); 4806 if (mTextActionMode != null) { 4807 invalidateActionMode(); 4808 } 4809 } 4810 4811 @Override 4812 void onHandleMoved() { 4813 super.onHandleMoved(); 4814 removeHiderCallback(); 4815 } 4816 4817 @Override 4818 public void onDetached() { 4819 super.onDetached(); 4820 removeHiderCallback(); 4821 } 4822 4823 @Override 4824 @MagnifierHandleTrigger 4825 protected int getMagnifierHandleTrigger() { 4826 return MagnifierHandleTrigger.INSERTION; 4827 } 4828 } 4829 4830 @Retention(RetentionPolicy.SOURCE) 4831 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4832 public @interface HandleType {} 4833 public static final int HANDLE_TYPE_SELECTION_START = 0; 4834 public static final int HANDLE_TYPE_SELECTION_END = 1; 4835 4836 /** For selection handles */ 4837 @VisibleForTesting 4838 public final class SelectionHandleView extends HandleView { 4839 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4840 // end (HANDLE_TYPE_SELECTION_END). 4841 @HandleType 4842 private final int mHandleType; 4843 // Indicates whether the cursor is making adjustments within a word. 4844 private boolean mInWord = false; 4845 // Difference between touch position and word boundary position. 4846 private float mTouchWordDelta; 4847 // X value of the previous updatePosition call. 4848 private float mPrevX; 4849 // Indicates if the handle has moved a boundary between LTR and RTL text. 4850 private boolean mLanguageDirectionChanged = false; 4851 // Distance from edge of horizontally scrolling text view 4852 // to use to switch to character mode. 4853 private final float mTextViewEdgeSlop; 4854 // Used to save text view location. 4855 private final int[] mTextViewLocation = new int[2]; 4856 4857 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4858 @HandleType int handleType) { 4859 super(drawableLtr, drawableRtl, id); 4860 mHandleType = handleType; 4861 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4862 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4863 } 4864 4865 private boolean isStartHandle() { 4866 return mHandleType == HANDLE_TYPE_SELECTION_START; 4867 } 4868 4869 @Override 4870 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4871 if (isRtlRun == isStartHandle()) { 4872 return drawable.getIntrinsicWidth() / 4; 4873 } else { 4874 return (drawable.getIntrinsicWidth() * 3) / 4; 4875 } 4876 } 4877 4878 @Override 4879 protected int getHorizontalGravity(boolean isRtlRun) { 4880 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4881 } 4882 4883 @Override 4884 public int getCurrentCursorOffset() { 4885 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4886 } 4887 4888 @Override 4889 protected void updateSelection(int offset) { 4890 if (isStartHandle()) { 4891 Selection.setSelection((Spannable) mTextView.getText(), offset, 4892 mTextView.getSelectionEnd()); 4893 } else { 4894 Selection.setSelection((Spannable) mTextView.getText(), 4895 mTextView.getSelectionStart(), offset); 4896 } 4897 updateDrawable(); 4898 if (mTextActionMode != null) { 4899 invalidateActionMode(); 4900 } 4901 } 4902 4903 @Override 4904 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4905 final Layout layout = mTextView.getLayout(); 4906 if (layout == null) { 4907 // HandleView will deal appropriately in positionAtCursorOffset when 4908 // layout is null. 4909 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y), 4910 fromTouchScreen); 4911 return; 4912 } 4913 4914 if (mPreviousLineTouched == UNSET_LINE) { 4915 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4916 } 4917 4918 boolean positionCursor = false; 4919 final int anotherHandleOffset = 4920 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4921 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4922 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4923 4924 if (isStartHandle() && initialOffset >= anotherHandleOffset 4925 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4926 // Handles have crossed, bound it to the first selected line and 4927 // adjust by word / char as normal. 4928 currLine = layout.getLineForOffset(anotherHandleOffset); 4929 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4930 } 4931 4932 int offset = initialOffset; 4933 final int wordEnd = getWordEnd(offset); 4934 final int wordStart = getWordStart(offset); 4935 4936 if (mPrevX == UNSET_X_VALUE) { 4937 mPrevX = x; 4938 } 4939 4940 final int currentOffset = getCurrentCursorOffset(); 4941 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4942 final boolean atRtl = isAtRtlRun(layout, offset); 4943 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4944 4945 // We can't determine if the user is expanding or shrinking the selection if they're 4946 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4947 // the cursor at the current position. 4948 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4949 // We're on a boundary or this is the first direction change -- just update 4950 // to the current position. 4951 mLanguageDirectionChanged = true; 4952 mTouchWordDelta = 0.0f; 4953 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4954 return; 4955 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4956 // We've just moved past the boundary so update the position. After this we can 4957 // figure out if the user is expanding or shrinking to go by word or character. 4958 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4959 mTouchWordDelta = 0.0f; 4960 mLanguageDirectionChanged = false; 4961 return; 4962 } 4963 4964 boolean isExpanding; 4965 final float xDiff = x - mPrevX; 4966 if (isStartHandle()) { 4967 isExpanding = currLine < mPreviousLineTouched; 4968 } else { 4969 isExpanding = currLine > mPreviousLineTouched; 4970 } 4971 if (atRtl == isStartHandle()) { 4972 isExpanding |= xDiff > 0; 4973 } else { 4974 isExpanding |= xDiff < 0; 4975 } 4976 4977 if (mTextView.getHorizontallyScrolling()) { 4978 if (positionNearEdgeOfScrollingView(x, atRtl) 4979 && ((isStartHandle() && mTextView.getScrollX() != 0) 4980 || (!isStartHandle() 4981 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4982 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4983 || (!isStartHandle() && offset > currentOffset))) 4984 || !isExpanding)) { 4985 // If we're expanding ensure that the offset is actually expanding compared to 4986 // the current offset, if the handle snapped to the word, the finger position 4987 // may be out of sync and we don't want the selection to jump back. 4988 mTouchWordDelta = 0.0f; 4989 final int nextOffset = (atRtl == isStartHandle()) 4990 ? layout.getOffsetToRightOf(mPreviousOffset) 4991 : layout.getOffsetToLeftOf(mPreviousOffset); 4992 positionAndAdjustForCrossingHandles(nextOffset, fromTouchScreen); 4993 return; 4994 } 4995 } 4996 4997 if (isExpanding) { 4998 // User is increasing the selection. 4999 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 5000 final boolean snapToWord = (!mInWord 5001 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 5002 && atRtl == isAtRtlRun(layout, wordBoundary); 5003 if (snapToWord) { 5004 // Sometimes words can be broken across lines (Chinese, hyphenation). 5005 // We still snap to the word boundary but we only use the letters on the 5006 // current line to determine if the user is far enough into the word to snap. 5007 if (layout.getLineForOffset(wordBoundary) != currLine) { 5008 wordBoundary = isStartHandle() 5009 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 5010 } 5011 final int offsetThresholdToSnap = isStartHandle() 5012 ? wordEnd - ((wordEnd - wordBoundary) / 2) 5013 : wordStart + ((wordBoundary - wordStart) / 2); 5014 if (isStartHandle() 5015 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 5016 // User is far enough into the word or on a different line so we expand by 5017 // word. 5018 offset = wordStart; 5019 } else if (!isStartHandle() 5020 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 5021 // User is far enough into the word or on a different line so we expand by 5022 // word. 5023 offset = wordEnd; 5024 } else { 5025 offset = mPreviousOffset; 5026 } 5027 } 5028 if ((isStartHandle() && offset < initialOffset) 5029 || (!isStartHandle() && offset > initialOffset)) { 5030 final float adjustedX = getHorizontal(layout, offset); 5031 mTouchWordDelta = 5032 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 5033 } else { 5034 mTouchWordDelta = 0.0f; 5035 } 5036 positionCursor = true; 5037 } else { 5038 final int adjustedOffset = 5039 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 5040 final boolean shrinking = isStartHandle() 5041 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 5042 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 5043 if (shrinking) { 5044 // User is shrinking the selection. 5045 if (currLine != mPrevLine) { 5046 // We're on a different line, so we'll snap to word boundaries. 5047 offset = isStartHandle() ? wordStart : wordEnd; 5048 if ((isStartHandle() && offset < initialOffset) 5049 || (!isStartHandle() && offset > initialOffset)) { 5050 final float adjustedX = getHorizontal(layout, offset); 5051 mTouchWordDelta = 5052 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 5053 } else { 5054 mTouchWordDelta = 0.0f; 5055 } 5056 } else { 5057 offset = adjustedOffset; 5058 } 5059 positionCursor = true; 5060 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 5061 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 5062 // Handle has jumped to the word boundary, and the user is moving 5063 // their finger towards the handle, the delta should be updated. 5064 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 5065 - getHorizontal(layout, mPreviousOffset); 5066 } 5067 } 5068 5069 if (positionCursor) { 5070 mPreviousLineTouched = currLine; 5071 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5072 } 5073 mPrevX = x; 5074 } 5075 5076 @Override 5077 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 5078 boolean fromTouchScreen) { 5079 super.positionAtCursorOffset(offset, forceUpdatePosition, fromTouchScreen); 5080 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 5081 } 5082 5083 @Override 5084 public boolean onTouchEvent(MotionEvent event) { 5085 boolean superResult = super.onTouchEvent(event); 5086 5087 switch (event.getActionMasked()) { 5088 case MotionEvent.ACTION_DOWN: 5089 // Reset the touch word offset and x value when the user 5090 // re-engages the handle. 5091 mTouchWordDelta = 0.0f; 5092 mPrevX = UNSET_X_VALUE; 5093 showMagnifier(); 5094 break; 5095 5096 case MotionEvent.ACTION_MOVE: 5097 showMagnifier(); 5098 break; 5099 5100 case MotionEvent.ACTION_UP: 5101 case MotionEvent.ACTION_CANCEL: 5102 dismissMagnifier(); 5103 break; 5104 } 5105 5106 return superResult; 5107 } 5108 5109 private void positionAndAdjustForCrossingHandles(int offset, boolean fromTouchScreen) { 5110 final int anotherHandleOffset = 5111 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5112 if ((isStartHandle() && offset >= anotherHandleOffset) 5113 || (!isStartHandle() && offset <= anotherHandleOffset)) { 5114 mTouchWordDelta = 0.0f; 5115 final Layout layout = mTextView.getLayout(); 5116 if (layout != null && offset != anotherHandleOffset) { 5117 final float horiz = getHorizontal(layout, offset); 5118 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 5119 !isStartHandle()); 5120 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 5121 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 5122 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 5123 // This handle passes another one as it crossed a direction boundary. 5124 // Don't minimize the selection, but keep the handle at the run boundary. 5125 final int currentOffset = getCurrentCursorOffset(); 5126 final int offsetToGetRunRange = isStartHandle() 5127 ? currentOffset : Math.max(currentOffset - 1, 0); 5128 final long range = layout.getRunRange(offsetToGetRunRange); 5129 if (isStartHandle()) { 5130 offset = TextUtils.unpackRangeStartFromLong(range); 5131 } else { 5132 offset = TextUtils.unpackRangeEndFromLong(range); 5133 } 5134 positionAtCursorOffset(offset, false, fromTouchScreen); 5135 return; 5136 } 5137 } 5138 // Handles can not cross and selection is at least one character. 5139 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5140 } 5141 positionAtCursorOffset(offset, false, fromTouchScreen); 5142 } 5143 5144 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5145 mTextView.getLocationOnScreen(mTextViewLocation); 5146 boolean nearEdge; 5147 if (atRtl == isStartHandle()) { 5148 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5149 - mTextView.getPaddingRight(); 5150 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5151 } else { 5152 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5153 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5154 } 5155 return nearEdge; 5156 } 5157 5158 @Override 5159 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5160 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5161 return layout.isRtlCharAt(offsetToCheck); 5162 } 5163 5164 @Override 5165 public float getHorizontal(@NonNull Layout layout, int offset) { 5166 return getHorizontal(layout, offset, isStartHandle()); 5167 } 5168 5169 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5170 final int line = layout.getLineForOffset(offset); 5171 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5172 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5173 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5174 return (isRtlChar == isRtlParagraph) 5175 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5176 } 5177 5178 @Override 5179 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5180 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5181 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5182 if (!layout.isLevelBoundary(primaryOffset)) { 5183 return primaryOffset; 5184 } 5185 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5186 final int currentOffset = getCurrentCursorOffset(); 5187 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5188 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5189 if (primaryDiff < secondaryDiff) { 5190 return primaryOffset; 5191 } else if (primaryDiff > secondaryDiff) { 5192 return secondaryOffset; 5193 } else { 5194 final int offsetToCheck = isStartHandle() 5195 ? currentOffset : Math.max(currentOffset - 1, 0); 5196 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5197 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5198 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5199 } 5200 } 5201 5202 @MagnifierHandleTrigger 5203 protected int getMagnifierHandleTrigger() { 5204 return isStartHandle() 5205 ? MagnifierHandleTrigger.SELECTION_START 5206 : MagnifierHandleTrigger.SELECTION_END; 5207 } 5208 } 5209 5210 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5211 final int trueLine = mTextView.getLineAtCoordinate(y); 5212 if (layout == null || prevLine > layout.getLineCount() 5213 || layout.getLineCount() <= 0 || prevLine < 0) { 5214 // Invalid parameters, just return whatever line is at y. 5215 return trueLine; 5216 } 5217 5218 if (Math.abs(trueLine - prevLine) >= 2) { 5219 // Only stick to lines if we're within a line of the previous selection. 5220 return trueLine; 5221 } 5222 5223 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5224 final int lineCount = layout.getLineCount(); 5225 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5226 5227 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5228 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5229 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5230 5231 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5232 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5233 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5234 5235 // Determine if we've moved lines based on y position and previous line. 5236 int currLine; 5237 if (y <= yTopBound) { 5238 currLine = Math.max(prevLine - 1, 0); 5239 } else if (y >= yBottomBound) { 5240 currLine = Math.min(prevLine + 1, lineCount - 1); 5241 } else { 5242 currLine = prevLine; 5243 } 5244 return currLine; 5245 } 5246 5247 /** 5248 * A CursorController instance can be used to control a cursor in the text. 5249 */ 5250 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5251 /** 5252 * Makes the cursor controller visible on screen. 5253 * See also {@link #hide()}. 5254 */ 5255 public void show(); 5256 5257 /** 5258 * Hide the cursor controller from screen. 5259 * See also {@link #show()}. 5260 */ 5261 public void hide(); 5262 5263 /** 5264 * Called when the view is detached from window. Perform house keeping task, such as 5265 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5266 * preventing the activity from being recycled. 5267 */ 5268 public void onDetached(); 5269 5270 public boolean isCursorBeingModified(); 5271 5272 public boolean isActive(); 5273 } 5274 5275 private class InsertionPointCursorController implements CursorController { 5276 private InsertionHandleView mHandle; 5277 5278 public void show() { 5279 getHandle().show(); 5280 5281 if (mSelectionModifierCursorController != null) { 5282 mSelectionModifierCursorController.hide(); 5283 } 5284 } 5285 5286 public void hide() { 5287 if (mHandle != null) { 5288 mHandle.hide(); 5289 } 5290 } 5291 5292 public void onTouchModeChanged(boolean isInTouchMode) { 5293 if (!isInTouchMode) { 5294 hide(); 5295 } 5296 } 5297 5298 private InsertionHandleView getHandle() { 5299 if (mSelectHandleCenter == null) { 5300 mSelectHandleCenter = mTextView.getContext().getDrawable( 5301 mTextView.mTextSelectHandleRes); 5302 } 5303 if (mHandle == null) { 5304 mHandle = new InsertionHandleView(mSelectHandleCenter); 5305 } 5306 return mHandle; 5307 } 5308 5309 @Override 5310 public void onDetached() { 5311 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5312 observer.removeOnTouchModeChangeListener(this); 5313 5314 if (mHandle != null) mHandle.onDetached(); 5315 } 5316 5317 @Override 5318 public boolean isCursorBeingModified() { 5319 return mHandle != null && mHandle.isDragging(); 5320 } 5321 5322 @Override 5323 public boolean isActive() { 5324 return mHandle != null && mHandle.isShowing(); 5325 } 5326 5327 public void invalidateHandle() { 5328 if (mHandle != null) { 5329 mHandle.invalidate(); 5330 } 5331 } 5332 } 5333 5334 class SelectionModifierCursorController implements CursorController { 5335 // The cursor controller handles, lazily created when shown. 5336 private SelectionHandleView mStartHandle; 5337 private SelectionHandleView mEndHandle; 5338 // The offsets of that last touch down event. Remembered to start selection there. 5339 private int mMinTouchOffset, mMaxTouchOffset; 5340 5341 private float mDownPositionX, mDownPositionY; 5342 private boolean mGestureStayedInTapRegion; 5343 5344 // Where the user first starts the drag motion. 5345 private int mStartOffset = -1; 5346 5347 private boolean mHaventMovedEnoughToStartDrag; 5348 // The line that a selection happened most recently with the drag accelerator. 5349 private int mLineSelectionIsOn = -1; 5350 // Whether the drag accelerator has selected past the initial line. 5351 private boolean mSwitchedLines = false; 5352 5353 // Indicates the drag accelerator mode that the user is currently using. 5354 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5355 // Drag accelerator is inactive. 5356 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5357 // Character based selection by dragging. Only for mouse. 5358 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5359 // Word based selection by dragging. Enabled after long pressing or double tapping. 5360 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5361 // Paragraph based selection by dragging. Enabled after mouse triple click. 5362 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5363 5364 SelectionModifierCursorController() { 5365 resetTouchOffsets(); 5366 } 5367 5368 public void show() { 5369 if (mTextView.isInBatchEditMode()) { 5370 return; 5371 } 5372 initDrawables(); 5373 initHandles(); 5374 } 5375 5376 private void initDrawables() { 5377 if (mSelectHandleLeft == null) { 5378 mSelectHandleLeft = mTextView.getContext().getDrawable( 5379 mTextView.mTextSelectHandleLeftRes); 5380 } 5381 if (mSelectHandleRight == null) { 5382 mSelectHandleRight = mTextView.getContext().getDrawable( 5383 mTextView.mTextSelectHandleRightRes); 5384 } 5385 } 5386 5387 private void initHandles() { 5388 // Lazy object creation has to be done before updatePosition() is called. 5389 if (mStartHandle == null) { 5390 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5391 com.android.internal.R.id.selection_start_handle, 5392 HANDLE_TYPE_SELECTION_START); 5393 } 5394 if (mEndHandle == null) { 5395 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5396 com.android.internal.R.id.selection_end_handle, 5397 HANDLE_TYPE_SELECTION_END); 5398 } 5399 5400 mStartHandle.show(); 5401 mEndHandle.show(); 5402 5403 hideInsertionPointCursorController(); 5404 } 5405 5406 public void hide() { 5407 if (mStartHandle != null) mStartHandle.hide(); 5408 if (mEndHandle != null) mEndHandle.hide(); 5409 } 5410 5411 public void enterDrag(int dragAcceleratorMode) { 5412 // Just need to init the handles / hide insertion cursor. 5413 show(); 5414 mDragAcceleratorMode = dragAcceleratorMode; 5415 // Start location of selection. 5416 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5417 mLastDownPositionY); 5418 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5419 // Don't show the handles until user has lifted finger. 5420 hide(); 5421 5422 // This stops scrolling parents from intercepting the touch event, allowing 5423 // the user to continue dragging across the screen to select text; TextView will 5424 // scroll as necessary. 5425 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5426 mTextView.cancelLongPress(); 5427 } 5428 5429 public void onTouchEvent(MotionEvent event) { 5430 // This is done even when the View does not have focus, so that long presses can start 5431 // selection and tap can move cursor from this tap position. 5432 final float eventX = event.getX(); 5433 final float eventY = event.getY(); 5434 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5435 switch (event.getActionMasked()) { 5436 case MotionEvent.ACTION_DOWN: 5437 if (extractedTextModeWillBeStarted()) { 5438 // Prevent duplicating the selection handles until the mode starts. 5439 hide(); 5440 } else { 5441 // Remember finger down position, to be able to start selection from there. 5442 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5443 eventX, eventY); 5444 5445 // Double tap detection 5446 if (mGestureStayedInTapRegion) { 5447 if (mTapState == TAP_STATE_DOUBLE_TAP 5448 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5449 final float deltaX = eventX - mDownPositionX; 5450 final float deltaY = eventY - mDownPositionY; 5451 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5452 5453 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5454 mTextView.getContext()); 5455 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5456 boolean stayedInArea = 5457 distanceSquared < doubleTapSlop * doubleTapSlop; 5458 5459 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5460 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5461 selectCurrentWordAndStartDrag(); 5462 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5463 selectCurrentParagraphAndStartDrag(); 5464 } 5465 mDiscardNextActionUp = true; 5466 } 5467 } 5468 } 5469 5470 mDownPositionX = eventX; 5471 mDownPositionY = eventY; 5472 mGestureStayedInTapRegion = true; 5473 mHaventMovedEnoughToStartDrag = true; 5474 } 5475 break; 5476 5477 case MotionEvent.ACTION_POINTER_DOWN: 5478 case MotionEvent.ACTION_POINTER_UP: 5479 // Handle multi-point gestures. Keep min and max offset positions. 5480 // Only activated for devices that correctly handle multi-touch. 5481 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5482 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5483 updateMinAndMaxOffsets(event); 5484 } 5485 break; 5486 5487 case MotionEvent.ACTION_MOVE: 5488 final ViewConfiguration viewConfig = ViewConfiguration.get( 5489 mTextView.getContext()); 5490 final int touchSlop = viewConfig.getScaledTouchSlop(); 5491 5492 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5493 final float deltaX = eventX - mDownPositionX; 5494 final float deltaY = eventY - mDownPositionY; 5495 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5496 5497 if (mGestureStayedInTapRegion) { 5498 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5499 mGestureStayedInTapRegion = 5500 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5501 } 5502 if (mHaventMovedEnoughToStartDrag) { 5503 // We don't start dragging until the user has moved enough. 5504 mHaventMovedEnoughToStartDrag = 5505 distanceSquared <= touchSlop * touchSlop; 5506 } 5507 } 5508 5509 if (isMouse && !isDragAcceleratorActive()) { 5510 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5511 if (mTextView.hasSelection() 5512 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5513 && offset >= mTextView.getSelectionStart() 5514 && offset <= mTextView.getSelectionEnd()) { 5515 startDragAndDrop(); 5516 break; 5517 } 5518 5519 if (mStartOffset != offset) { 5520 // Start character based drag accelerator. 5521 stopTextActionMode(); 5522 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5523 mDiscardNextActionUp = true; 5524 mHaventMovedEnoughToStartDrag = false; 5525 } 5526 } 5527 5528 if (mStartHandle != null && mStartHandle.isShowing()) { 5529 // Don't do the drag if the handles are showing already. 5530 break; 5531 } 5532 5533 updateSelection(event); 5534 break; 5535 5536 case MotionEvent.ACTION_UP: 5537 if (!isDragAcceleratorActive()) { 5538 break; 5539 } 5540 updateSelection(event); 5541 5542 // No longer dragging to select text, let the parent intercept events. 5543 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5544 5545 // No longer the first dragging motion, reset. 5546 resetDragAcceleratorState(); 5547 5548 if (mTextView.hasSelection()) { 5549 // Drag selection should not be adjusted by the text classifier. 5550 startSelectionActionModeAsync(mHaventMovedEnoughToStartDrag); 5551 } 5552 break; 5553 } 5554 } 5555 5556 private void updateSelection(MotionEvent event) { 5557 if (mTextView.getLayout() != null) { 5558 switch (mDragAcceleratorMode) { 5559 case DRAG_ACCELERATOR_MODE_CHARACTER: 5560 updateCharacterBasedSelection(event); 5561 break; 5562 case DRAG_ACCELERATOR_MODE_WORD: 5563 updateWordBasedSelection(event); 5564 break; 5565 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5566 updateParagraphBasedSelection(event); 5567 break; 5568 } 5569 } 5570 } 5571 5572 /** 5573 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5574 * 5575 * @return true if the drag was started. 5576 */ 5577 private boolean selectCurrentParagraphAndStartDrag() { 5578 if (mInsertionActionModeRunnable != null) { 5579 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5580 } 5581 stopTextActionMode(); 5582 if (!selectCurrentParagraph()) { 5583 return false; 5584 } 5585 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5586 return true; 5587 } 5588 5589 private void updateCharacterBasedSelection(MotionEvent event) { 5590 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5591 updateSelectionInternal(mStartOffset, offset, 5592 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5593 } 5594 5595 private void updateWordBasedSelection(MotionEvent event) { 5596 if (mHaventMovedEnoughToStartDrag) { 5597 return; 5598 } 5599 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5600 final ViewConfiguration viewConfig = ViewConfiguration.get( 5601 mTextView.getContext()); 5602 final float eventX = event.getX(); 5603 final float eventY = event.getY(); 5604 final int currLine; 5605 if (isMouse) { 5606 // No need to offset the y coordinate for mouse input. 5607 currLine = mTextView.getLineAtCoordinate(eventY); 5608 } else { 5609 float y = eventY; 5610 if (mSwitchedLines) { 5611 // Offset the finger by the same vertical offset as the handles. 5612 // This improves visibility of the content being selected by 5613 // shifting the finger below the content, this is applied once 5614 // the user has switched lines. 5615 final int touchSlop = viewConfig.getScaledTouchSlop(); 5616 final float fingerOffset = (mStartHandle != null) 5617 ? mStartHandle.getIdealVerticalOffset() 5618 : touchSlop; 5619 y = eventY - fingerOffset; 5620 } 5621 5622 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5623 y); 5624 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5625 // Break early here, we want to offset the finger position from 5626 // the selection highlight, once the user moved their finger 5627 // to a different line we should apply the offset and *not* switch 5628 // lines until recomputing the position with the finger offset. 5629 mSwitchedLines = true; 5630 return; 5631 } 5632 } 5633 5634 int startOffset; 5635 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5636 // Snap to word boundaries. 5637 if (mStartOffset < offset) { 5638 // Expanding with end handle. 5639 offset = getWordEnd(offset); 5640 startOffset = getWordStart(mStartOffset); 5641 } else { 5642 // Expanding with start handle. 5643 offset = getWordStart(offset); 5644 startOffset = getWordEnd(mStartOffset); 5645 if (startOffset == offset) { 5646 offset = getNextCursorOffset(offset, false); 5647 } 5648 } 5649 mLineSelectionIsOn = currLine; 5650 updateSelectionInternal(startOffset, offset, 5651 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5652 } 5653 5654 private void updateParagraphBasedSelection(MotionEvent event) { 5655 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5656 5657 final int start = Math.min(offset, mStartOffset); 5658 final int end = Math.max(offset, mStartOffset); 5659 final long paragraphsRange = getParagraphsRange(start, end); 5660 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5661 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5662 updateSelectionInternal(selectionStart, selectionEnd, 5663 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5664 } 5665 5666 private void updateSelectionInternal(int selectionStart, int selectionEnd, 5667 boolean fromTouchScreen) { 5668 final boolean performHapticFeedback = fromTouchScreen && mHapticTextHandleEnabled 5669 && ((mTextView.getSelectionStart() != selectionStart) 5670 || (mTextView.getSelectionEnd() != selectionEnd)); 5671 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5672 if (performHapticFeedback) { 5673 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 5674 } 5675 } 5676 5677 /** 5678 * @param event 5679 */ 5680 private void updateMinAndMaxOffsets(MotionEvent event) { 5681 int pointerCount = event.getPointerCount(); 5682 for (int index = 0; index < pointerCount; index++) { 5683 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5684 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5685 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5686 } 5687 } 5688 5689 public int getMinTouchOffset() { 5690 return mMinTouchOffset; 5691 } 5692 5693 public int getMaxTouchOffset() { 5694 return mMaxTouchOffset; 5695 } 5696 5697 public void resetTouchOffsets() { 5698 mMinTouchOffset = mMaxTouchOffset = -1; 5699 resetDragAcceleratorState(); 5700 } 5701 5702 private void resetDragAcceleratorState() { 5703 mStartOffset = -1; 5704 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5705 mSwitchedLines = false; 5706 final int selectionStart = mTextView.getSelectionStart(); 5707 final int selectionEnd = mTextView.getSelectionEnd(); 5708 if (selectionStart > selectionEnd) { 5709 Selection.setSelection((Spannable) mTextView.getText(), 5710 selectionEnd, selectionStart); 5711 } 5712 } 5713 5714 /** 5715 * @return true iff this controller is currently used to move the selection start. 5716 */ 5717 public boolean isSelectionStartDragged() { 5718 return mStartHandle != null && mStartHandle.isDragging(); 5719 } 5720 5721 @Override 5722 public boolean isCursorBeingModified() { 5723 return isDragAcceleratorActive() || isSelectionStartDragged() 5724 || (mEndHandle != null && mEndHandle.isDragging()); 5725 } 5726 5727 /** 5728 * @return true if the user is selecting text using the drag accelerator. 5729 */ 5730 public boolean isDragAcceleratorActive() { 5731 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5732 } 5733 5734 public void onTouchModeChanged(boolean isInTouchMode) { 5735 if (!isInTouchMode) { 5736 hide(); 5737 } 5738 } 5739 5740 @Override 5741 public void onDetached() { 5742 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5743 observer.removeOnTouchModeChangeListener(this); 5744 5745 if (mStartHandle != null) mStartHandle.onDetached(); 5746 if (mEndHandle != null) mEndHandle.onDetached(); 5747 } 5748 5749 @Override 5750 public boolean isActive() { 5751 return mStartHandle != null && mStartHandle.isShowing(); 5752 } 5753 5754 public void invalidateHandles() { 5755 if (mStartHandle != null) { 5756 mStartHandle.invalidate(); 5757 } 5758 if (mEndHandle != null) { 5759 mEndHandle.invalidate(); 5760 } 5761 } 5762 } 5763 5764 private class CorrectionHighlighter { 5765 private final Path mPath = new Path(); 5766 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5767 private int mStart, mEnd; 5768 private long mFadingStartTime; 5769 private RectF mTempRectF; 5770 private static final int FADE_OUT_DURATION = 400; 5771 5772 public CorrectionHighlighter() { 5773 mPaint.setCompatibilityScaling( 5774 mTextView.getResources().getCompatibilityInfo().applicationScale); 5775 mPaint.setStyle(Paint.Style.FILL); 5776 } 5777 5778 public void highlight(CorrectionInfo info) { 5779 mStart = info.getOffset(); 5780 mEnd = mStart + info.getNewText().length(); 5781 mFadingStartTime = SystemClock.uptimeMillis(); 5782 5783 if (mStart < 0 || mEnd < 0) { 5784 stopAnimation(); 5785 } 5786 } 5787 5788 public void draw(Canvas canvas, int cursorOffsetVertical) { 5789 if (updatePath() && updatePaint()) { 5790 if (cursorOffsetVertical != 0) { 5791 canvas.translate(0, cursorOffsetVertical); 5792 } 5793 5794 canvas.drawPath(mPath, mPaint); 5795 5796 if (cursorOffsetVertical != 0) { 5797 canvas.translate(0, -cursorOffsetVertical); 5798 } 5799 invalidate(true); // TODO invalidate cursor region only 5800 } else { 5801 stopAnimation(); 5802 invalidate(false); // TODO invalidate cursor region only 5803 } 5804 } 5805 5806 private boolean updatePaint() { 5807 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5808 if (duration > FADE_OUT_DURATION) return false; 5809 5810 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5811 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5812 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5813 + ((int) (highlightColorAlpha * coef) << 24); 5814 mPaint.setColor(color); 5815 return true; 5816 } 5817 5818 private boolean updatePath() { 5819 final Layout layout = mTextView.getLayout(); 5820 if (layout == null) return false; 5821 5822 // Update in case text is edited while the animation is run 5823 final int length = mTextView.getText().length(); 5824 int start = Math.min(length, mStart); 5825 int end = Math.min(length, mEnd); 5826 5827 mPath.reset(); 5828 layout.getSelectionPath(start, end, mPath); 5829 return true; 5830 } 5831 5832 private void invalidate(boolean delayed) { 5833 if (mTextView.getLayout() == null) return; 5834 5835 if (mTempRectF == null) mTempRectF = new RectF(); 5836 mPath.computeBounds(mTempRectF, false); 5837 5838 int left = mTextView.getCompoundPaddingLeft(); 5839 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5840 5841 if (delayed) { 5842 mTextView.postInvalidateOnAnimation( 5843 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5844 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5845 } else { 5846 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5847 (int) mTempRectF.right, (int) mTempRectF.bottom); 5848 } 5849 } 5850 5851 private void stopAnimation() { 5852 Editor.this.mCorrectionHighlighter = null; 5853 } 5854 } 5855 5856 private static class ErrorPopup extends PopupWindow { 5857 private boolean mAbove = false; 5858 private final TextView mView; 5859 private int mPopupInlineErrorBackgroundId = 0; 5860 private int mPopupInlineErrorAboveBackgroundId = 0; 5861 5862 ErrorPopup(TextView v, int width, int height) { 5863 super(v, width, height); 5864 mView = v; 5865 // Make sure the TextView has a background set as it will be used the first time it is 5866 // shown and positioned. Initialized with below background, which should have 5867 // dimensions identical to the above version for this to work (and is more likely). 5868 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5869 com.android.internal.R.styleable.Theme_errorMessageBackground); 5870 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5871 } 5872 5873 void fixDirection(boolean above) { 5874 mAbove = above; 5875 5876 if (above) { 5877 mPopupInlineErrorAboveBackgroundId = 5878 getResourceId(mPopupInlineErrorAboveBackgroundId, 5879 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5880 } else { 5881 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5882 com.android.internal.R.styleable.Theme_errorMessageBackground); 5883 } 5884 5885 mView.setBackgroundResource( 5886 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5887 } 5888 5889 private int getResourceId(int currentId, int index) { 5890 if (currentId == 0) { 5891 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5892 R.styleable.Theme); 5893 currentId = styledAttributes.getResourceId(index, 0); 5894 styledAttributes.recycle(); 5895 } 5896 return currentId; 5897 } 5898 5899 @Override 5900 public void update(int x, int y, int w, int h, boolean force) { 5901 super.update(x, y, w, h, force); 5902 5903 boolean above = isAboveAnchor(); 5904 if (above != mAbove) { 5905 fixDirection(above); 5906 } 5907 } 5908 } 5909 5910 static class InputContentType { 5911 int imeOptions = EditorInfo.IME_NULL; 5912 String privateImeOptions; 5913 CharSequence imeActionLabel; 5914 int imeActionId; 5915 Bundle extras; 5916 OnEditorActionListener onEditorActionListener; 5917 boolean enterDown; 5918 LocaleList imeHintLocales; 5919 } 5920 5921 static class InputMethodState { 5922 ExtractedTextRequest mExtractedTextRequest; 5923 final ExtractedText mExtractedText = new ExtractedText(); 5924 int mBatchEditNesting; 5925 boolean mCursorChanged; 5926 boolean mSelectionModeChanged; 5927 boolean mContentChanged; 5928 int mChangedStart, mChangedEnd, mChangedDelta; 5929 } 5930 5931 /** 5932 * @return True iff (start, end) is a valid range within the text. 5933 */ 5934 private static boolean isValidRange(CharSequence text, int start, int end) { 5935 return 0 <= start && start <= end && end <= text.length(); 5936 } 5937 5938 @VisibleForTesting 5939 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5940 return mSuggestionsPopupWindow; 5941 } 5942 5943 /** 5944 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5945 * text being typed (and hence always returns null from the filter() method). 5946 * 5947 * TODO: Make this span aware. 5948 */ 5949 public static class UndoInputFilter implements InputFilter { 5950 private final Editor mEditor; 5951 5952 // Whether the current filter pass is directly caused by an end-user text edit. 5953 private boolean mIsUserEdit; 5954 5955 // Whether the text field is handling an IME composition. Must be parceled in case the user 5956 // rotates the screen during composition. 5957 private boolean mHasComposition; 5958 5959 // Whether the user is expanding or shortening the text 5960 private boolean mExpanding; 5961 5962 // Whether the previous edit operation was in the current batch edit. 5963 private boolean mPreviousOperationWasInSameBatchEdit; 5964 5965 public UndoInputFilter(Editor editor) { 5966 mEditor = editor; 5967 } 5968 5969 public void saveInstanceState(Parcel parcel) { 5970 parcel.writeInt(mIsUserEdit ? 1 : 0); 5971 parcel.writeInt(mHasComposition ? 1 : 0); 5972 parcel.writeInt(mExpanding ? 1 : 0); 5973 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5974 } 5975 5976 public void restoreInstanceState(Parcel parcel) { 5977 mIsUserEdit = parcel.readInt() != 0; 5978 mHasComposition = parcel.readInt() != 0; 5979 mExpanding = parcel.readInt() != 0; 5980 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5981 } 5982 5983 /** 5984 * Signals that a user-triggered edit is starting. 5985 */ 5986 public void beginBatchEdit() { 5987 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5988 mIsUserEdit = true; 5989 } 5990 5991 public void endBatchEdit() { 5992 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5993 mIsUserEdit = false; 5994 mPreviousOperationWasInSameBatchEdit = false; 5995 } 5996 5997 @Override 5998 public CharSequence filter(CharSequence source, int start, int end, 5999 Spanned dest, int dstart, int dend) { 6000 if (DEBUG_UNDO) { 6001 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 6002 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 6003 } 6004 6005 // Check to see if this edit should be tracked for undo. 6006 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 6007 return null; 6008 } 6009 6010 final boolean hadComposition = mHasComposition; 6011 mHasComposition = isComposition(source); 6012 final boolean wasExpanding = mExpanding; 6013 boolean shouldCreateSeparateState = false; 6014 if ((end - start) != (dend - dstart)) { 6015 mExpanding = (end - start) > (dend - dstart); 6016 if (hadComposition && mExpanding != wasExpanding) { 6017 shouldCreateSeparateState = true; 6018 } 6019 } 6020 6021 // Handle edit. 6022 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 6023 return null; 6024 } 6025 6026 void freezeLastEdit() { 6027 mEditor.mUndoManager.beginUpdate("Edit text"); 6028 EditOperation lastEdit = getLastEdit(); 6029 if (lastEdit != null) { 6030 lastEdit.mFrozen = true; 6031 } 6032 mEditor.mUndoManager.endUpdate(); 6033 } 6034 6035 @Retention(RetentionPolicy.SOURCE) 6036 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 6037 private @interface MergeMode {} 6038 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 6039 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 6040 /** Use {@link EditOperation#mergeWith} to merge */ 6041 private static final int MERGE_EDIT_MODE_NORMAL = 2; 6042 6043 private void handleEdit(CharSequence source, int start, int end, 6044 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 6045 // An application may install a TextWatcher to provide additional modifications after 6046 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 6047 // string). This results in multiple filter() calls for what the user considers to be 6048 // a single operation. Always undo the whole set of changes in one step. 6049 @MergeMode 6050 final int mergeMode; 6051 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 6052 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 6053 } else if (shouldCreateSeparateState) { 6054 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 6055 } else { 6056 mergeMode = MERGE_EDIT_MODE_NORMAL; 6057 } 6058 // Build a new operation with all the information from this edit. 6059 String newText = TextUtils.substring(source, start, end); 6060 String oldText = TextUtils.substring(dest, dstart, dend); 6061 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 6062 mHasComposition); 6063 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 6064 return; 6065 } 6066 recordEdit(edit, mergeMode); 6067 } 6068 6069 private EditOperation getLastEdit() { 6070 final UndoManager um = mEditor.mUndoManager; 6071 return um.getLastOperation( 6072 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 6073 } 6074 /** 6075 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 6076 * If forceMerge is true then the new edit is always merged. 6077 */ 6078 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 6079 // Fetch the last edit operation and attempt to merge in the new edit. 6080 final UndoManager um = mEditor.mUndoManager; 6081 um.beginUpdate("Edit text"); 6082 EditOperation lastEdit = getLastEdit(); 6083 if (lastEdit == null) { 6084 // Add this as the first edit. 6085 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 6086 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6087 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 6088 // Forced merges take priority because they could be the result of a non-user-edit 6089 // change and this case should not create a new undo operation. 6090 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 6091 lastEdit.forceMergeWith(edit); 6092 } else if (!mIsUserEdit) { 6093 // An application directly modified the Editable outside of a text edit. Treat this 6094 // as a new change and don't attempt to merge. 6095 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 6096 um.commitState(mEditor.mUndoOwner); 6097 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6098 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 6099 // Merge succeeded, nothing else to do. 6100 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 6101 } else { 6102 // Could not merge with the last edit, so commit the last edit and add this edit. 6103 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 6104 um.commitState(mEditor.mUndoOwner); 6105 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6106 } 6107 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 6108 um.endUpdate(); 6109 } 6110 6111 private boolean canUndoEdit(CharSequence source, int start, int end, 6112 Spanned dest, int dstart, int dend) { 6113 if (!mEditor.mAllowUndo) { 6114 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 6115 return false; 6116 } 6117 6118 if (mEditor.mUndoManager.isInUndo()) { 6119 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 6120 return false; 6121 } 6122 6123 // Text filters run before input operations are applied. However, some input operations 6124 // are invalid and will throw exceptions when applied. This is common in tests. Don't 6125 // attempt to undo invalid operations. 6126 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 6127 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 6128 return false; 6129 } 6130 6131 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 6132 // on an input field. Skip no-op changes. 6133 if (start == end && dstart == dend) { 6134 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 6135 return false; 6136 } 6137 6138 return true; 6139 } 6140 6141 private static boolean isComposition(CharSequence source) { 6142 if (!(source instanceof Spannable)) { 6143 return false; 6144 } 6145 // This is a composition edit if the source has a non-zero-length composing span. 6146 Spannable text = (Spannable) source; 6147 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6148 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6149 return composeBegin < composeEnd; 6150 } 6151 6152 private boolean isInTextWatcher() { 6153 CharSequence text = mEditor.mTextView.getText(); 6154 return (text instanceof SpannableStringBuilder) 6155 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6156 } 6157 } 6158 6159 /** 6160 * An operation to undo a single "edit" to a text view. 6161 */ 6162 public static class EditOperation extends UndoOperation<Editor> { 6163 private static final int TYPE_INSERT = 0; 6164 private static final int TYPE_DELETE = 1; 6165 private static final int TYPE_REPLACE = 2; 6166 6167 private int mType; 6168 private String mOldText; 6169 private String mNewText; 6170 private int mStart; 6171 6172 private int mOldCursorPos; 6173 private int mNewCursorPos; 6174 private boolean mFrozen; 6175 private boolean mIsComposition; 6176 6177 /** 6178 * Constructs an edit operation from a text input operation on editor that replaces the 6179 * oldText starting at dstart with newText. 6180 */ 6181 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6182 boolean isComposition) { 6183 super(editor.mUndoOwner); 6184 mOldText = oldText; 6185 mNewText = newText; 6186 6187 // Determine the type of the edit. 6188 if (mNewText.length() > 0 && mOldText.length() == 0) { 6189 mType = TYPE_INSERT; 6190 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6191 mType = TYPE_DELETE; 6192 } else { 6193 mType = TYPE_REPLACE; 6194 } 6195 6196 mStart = dstart; 6197 // Store cursor data. 6198 mOldCursorPos = editor.mTextView.getSelectionStart(); 6199 mNewCursorPos = dstart + mNewText.length(); 6200 mIsComposition = isComposition; 6201 } 6202 6203 public EditOperation(Parcel src, ClassLoader loader) { 6204 super(src, loader); 6205 mType = src.readInt(); 6206 mOldText = src.readString(); 6207 mNewText = src.readString(); 6208 mStart = src.readInt(); 6209 mOldCursorPos = src.readInt(); 6210 mNewCursorPos = src.readInt(); 6211 mFrozen = src.readInt() == 1; 6212 mIsComposition = src.readInt() == 1; 6213 } 6214 6215 @Override 6216 public void writeToParcel(Parcel dest, int flags) { 6217 dest.writeInt(mType); 6218 dest.writeString(mOldText); 6219 dest.writeString(mNewText); 6220 dest.writeInt(mStart); 6221 dest.writeInt(mOldCursorPos); 6222 dest.writeInt(mNewCursorPos); 6223 dest.writeInt(mFrozen ? 1 : 0); 6224 dest.writeInt(mIsComposition ? 1 : 0); 6225 } 6226 6227 private int getNewTextEnd() { 6228 return mStart + mNewText.length(); 6229 } 6230 6231 private int getOldTextEnd() { 6232 return mStart + mOldText.length(); 6233 } 6234 6235 @Override 6236 public void commit() { 6237 } 6238 6239 @Override 6240 public void undo() { 6241 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6242 // Remove the new text and insert the old. 6243 Editor editor = getOwnerData(); 6244 Editable text = (Editable) editor.mTextView.getText(); 6245 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6246 } 6247 6248 @Override 6249 public void redo() { 6250 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6251 // Remove the old text and insert the new. 6252 Editor editor = getOwnerData(); 6253 Editable text = (Editable) editor.mTextView.getText(); 6254 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6255 } 6256 6257 /** 6258 * Attempts to merge this existing operation with a new edit. 6259 * @param edit The new edit operation. 6260 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6261 * object unchanged. 6262 */ 6263 private boolean mergeWith(EditOperation edit) { 6264 if (DEBUG_UNDO) { 6265 Log.d(TAG, "mergeWith old " + this); 6266 Log.d(TAG, "mergeWith new " + edit); 6267 } 6268 6269 if (mFrozen) { 6270 return false; 6271 } 6272 6273 switch (mType) { 6274 case TYPE_INSERT: 6275 return mergeInsertWith(edit); 6276 case TYPE_DELETE: 6277 return mergeDeleteWith(edit); 6278 case TYPE_REPLACE: 6279 return mergeReplaceWith(edit); 6280 default: 6281 return false; 6282 } 6283 } 6284 6285 private boolean mergeInsertWith(EditOperation edit) { 6286 if (edit.mType == TYPE_INSERT) { 6287 // Merge insertions that are contiguous even when it's frozen. 6288 if (getNewTextEnd() != edit.mStart) { 6289 return false; 6290 } 6291 mNewText += edit.mNewText; 6292 mNewCursorPos = edit.mNewCursorPos; 6293 mFrozen = edit.mFrozen; 6294 mIsComposition = edit.mIsComposition; 6295 return true; 6296 } 6297 if (mIsComposition && edit.mType == TYPE_REPLACE 6298 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6299 // Merge insertion with replace as they can be single insertion. 6300 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6301 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6302 mNewCursorPos = edit.mNewCursorPos; 6303 mIsComposition = edit.mIsComposition; 6304 return true; 6305 } 6306 return false; 6307 } 6308 6309 // TODO: Support forward delete. 6310 private boolean mergeDeleteWith(EditOperation edit) { 6311 // Only merge continuous deletes. 6312 if (edit.mType != TYPE_DELETE) { 6313 return false; 6314 } 6315 // Only merge deletions that are contiguous. 6316 if (mStart != edit.getOldTextEnd()) { 6317 return false; 6318 } 6319 mStart = edit.mStart; 6320 mOldText = edit.mOldText + mOldText; 6321 mNewCursorPos = edit.mNewCursorPos; 6322 mIsComposition = edit.mIsComposition; 6323 return true; 6324 } 6325 6326 private boolean mergeReplaceWith(EditOperation edit) { 6327 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6328 // Merge with adjacent insert. 6329 mNewText += edit.mNewText; 6330 mNewCursorPos = edit.mNewCursorPos; 6331 return true; 6332 } 6333 if (!mIsComposition) { 6334 return false; 6335 } 6336 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6337 && getNewTextEnd() >= edit.getOldTextEnd()) { 6338 // Merge with delete as they can be single operation. 6339 mNewText = mNewText.substring(0, edit.mStart - mStart) 6340 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6341 if (mNewText.isEmpty()) { 6342 mType = TYPE_DELETE; 6343 } 6344 mNewCursorPos = edit.mNewCursorPos; 6345 mIsComposition = edit.mIsComposition; 6346 return true; 6347 } 6348 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6349 && TextUtils.equals(mNewText, edit.mOldText)) { 6350 // Merge with the replace that replaces the same region. 6351 mNewText = edit.mNewText; 6352 mNewCursorPos = edit.mNewCursorPos; 6353 mIsComposition = edit.mIsComposition; 6354 return true; 6355 } 6356 return false; 6357 } 6358 6359 /** 6360 * Forcibly creates a single merged edit operation by simulating the entire text 6361 * contents being replaced. 6362 */ 6363 public void forceMergeWith(EditOperation edit) { 6364 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6365 if (mergeWith(edit)) { 6366 return; 6367 } 6368 Editor editor = getOwnerData(); 6369 6370 // Copy the text of the current field. 6371 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6372 // but would require two parallel implementations of modifyText() because Editable and 6373 // StringBuilder do not share an interface for replace/delete/insert. 6374 Editable editable = (Editable) editor.mTextView.getText(); 6375 Editable originalText = new SpannableStringBuilder(editable.toString()); 6376 6377 // Roll back the last operation. 6378 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6379 6380 // Clone the text again and apply the new operation. 6381 Editable finalText = new SpannableStringBuilder(editable.toString()); 6382 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6383 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6384 6385 // Convert this operation into a replace operation. 6386 mType = TYPE_REPLACE; 6387 mNewText = finalText.toString(); 6388 mOldText = originalText.toString(); 6389 mStart = 0; 6390 mNewCursorPos = edit.mNewCursorPos; 6391 mIsComposition = edit.mIsComposition; 6392 // mOldCursorPos is unchanged. 6393 } 6394 6395 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6396 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6397 // Apply the edit if it is still valid. 6398 if (isValidRange(text, deleteFrom, deleteTo) 6399 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6400 if (deleteFrom != deleteTo) { 6401 text.delete(deleteFrom, deleteTo); 6402 } 6403 if (newText.length() != 0) { 6404 text.insert(newTextInsertAt, newText); 6405 } 6406 } 6407 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6408 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6409 // TODO: Select all the text that was undone. 6410 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6411 Selection.setSelection(text, newCursorPos); 6412 } 6413 } 6414 6415 private String getTypeString() { 6416 switch (mType) { 6417 case TYPE_INSERT: 6418 return "insert"; 6419 case TYPE_DELETE: 6420 return "delete"; 6421 case TYPE_REPLACE: 6422 return "replace"; 6423 default: 6424 return ""; 6425 } 6426 } 6427 6428 @Override 6429 public String toString() { 6430 return "[mType=" + getTypeString() + ", " 6431 + "mOldText=" + mOldText + ", " 6432 + "mNewText=" + mNewText + ", " 6433 + "mStart=" + mStart + ", " 6434 + "mOldCursorPos=" + mOldCursorPos + ", " 6435 + "mNewCursorPos=" + mNewCursorPos + ", " 6436 + "mFrozen=" + mFrozen + ", " 6437 + "mIsComposition=" + mIsComposition + "]"; 6438 } 6439 6440 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6441 new Parcelable.ClassLoaderCreator<EditOperation>() { 6442 @Override 6443 public EditOperation createFromParcel(Parcel in) { 6444 return new EditOperation(in, null); 6445 } 6446 6447 @Override 6448 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6449 return new EditOperation(in, loader); 6450 } 6451 6452 @Override 6453 public EditOperation[] newArray(int size) { 6454 return new EditOperation[size]; 6455 } 6456 }; 6457 } 6458 6459 /** 6460 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6461 * These allow external applications to plug into currently selected text. 6462 */ 6463 static final class ProcessTextIntentActionsHandler { 6464 6465 private final Editor mEditor; 6466 private final TextView mTextView; 6467 private final Context mContext; 6468 private final PackageManager mPackageManager; 6469 private final String mPackageName; 6470 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6471 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6472 new SparseArray<>(); 6473 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6474 6475 private ProcessTextIntentActionsHandler(Editor editor) { 6476 mEditor = Preconditions.checkNotNull(editor); 6477 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6478 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6479 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6480 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6481 } 6482 6483 /** 6484 * Adds "PROCESS_TEXT" menu items to the specified menu. 6485 */ 6486 public void onInitializeMenu(Menu menu) { 6487 final int size = mSupportedActivities.size(); 6488 loadSupportedActivities(); 6489 for (int i = 0; i < size; i++) { 6490 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6491 menu.add(Menu.NONE, Menu.NONE, 6492 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6493 getLabel(resolveInfo)) 6494 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6495 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6496 } 6497 } 6498 6499 /** 6500 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6501 * menu item. 6502 * 6503 * @return True if the action was performed, false otherwise. 6504 */ 6505 public boolean performMenuItemAction(MenuItem item) { 6506 return fireIntent(item.getIntent()); 6507 } 6508 6509 /** 6510 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6511 */ 6512 public void initializeAccessibilityActions() { 6513 mAccessibilityIntents.clear(); 6514 mAccessibilityActions.clear(); 6515 int i = 0; 6516 loadSupportedActivities(); 6517 for (ResolveInfo resolveInfo : mSupportedActivities) { 6518 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6519 mAccessibilityActions.put( 6520 actionId, 6521 new AccessibilityNodeInfo.AccessibilityAction( 6522 actionId, getLabel(resolveInfo))); 6523 mAccessibilityIntents.put( 6524 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6525 } 6526 } 6527 6528 /** 6529 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6530 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6531 * latest accessibility actions available for this call. 6532 */ 6533 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6534 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6535 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6536 } 6537 } 6538 6539 /** 6540 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6541 * accessibility action id. 6542 * 6543 * @return True if the action was performed, false otherwise. 6544 */ 6545 public boolean performAccessibilityAction(int actionId) { 6546 return fireIntent(mAccessibilityIntents.get(actionId)); 6547 } 6548 6549 private boolean fireIntent(Intent intent) { 6550 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6551 String selectedText = mTextView.getSelectedText(); 6552 selectedText = TextUtils.trimToParcelableSize(selectedText); 6553 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, selectedText); 6554 mEditor.mPreserveSelection = true; 6555 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6556 return true; 6557 } 6558 return false; 6559 } 6560 6561 private void loadSupportedActivities() { 6562 mSupportedActivities.clear(); 6563 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6564 List<ResolveInfo> unfiltered = 6565 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6566 for (ResolveInfo info : unfiltered) { 6567 if (isSupportedActivity(info)) { 6568 mSupportedActivities.add(info); 6569 } 6570 } 6571 } 6572 6573 private boolean isSupportedActivity(ResolveInfo info) { 6574 return mPackageName.equals(info.activityInfo.packageName) 6575 || info.activityInfo.exported 6576 && (info.activityInfo.permission == null 6577 || mContext.checkSelfPermission(info.activityInfo.permission) 6578 == PackageManager.PERMISSION_GRANTED); 6579 } 6580 6581 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6582 return createProcessTextIntent() 6583 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6584 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6585 } 6586 6587 private Intent createProcessTextIntent() { 6588 return new Intent() 6589 .setAction(Intent.ACTION_PROCESS_TEXT) 6590 .setType("text/plain"); 6591 } 6592 6593 private CharSequence getLabel(ResolveInfo resolveInfo) { 6594 return resolveInfo.loadLabel(mPackageManager); 6595 } 6596 } 6597} 6598