Editor.java revision 6eecdc934c6050d67a639116cde600c09e5b76bd
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.os.Bundle; 45import android.os.LocaleList; 46import android.os.Parcel; 47import android.os.Parcelable; 48import android.os.ParcelableParcel; 49import android.os.SystemClock; 50import android.provider.Settings; 51import android.text.DynamicLayout; 52import android.text.Editable; 53import android.text.InputFilter; 54import android.text.InputType; 55import android.text.Layout; 56import android.text.ParcelableSpan; 57import android.text.Selection; 58import android.text.SpanWatcher; 59import android.text.Spannable; 60import android.text.SpannableStringBuilder; 61import android.text.Spanned; 62import android.text.StaticLayout; 63import android.text.TextUtils; 64import android.text.method.KeyListener; 65import android.text.method.MetaKeyKeyListener; 66import android.text.method.MovementMethod; 67import android.text.method.WordIterator; 68import android.text.style.EasyEditSpan; 69import android.text.style.SuggestionRangeSpan; 70import android.text.style.SuggestionSpan; 71import android.text.style.TextAppearanceSpan; 72import android.text.style.URLSpan; 73import android.util.ArraySet; 74import android.util.DisplayMetrics; 75import android.util.Log; 76import android.util.SparseArray; 77import android.view.ActionMode; 78import android.view.ActionMode.Callback; 79import android.view.ContextMenu; 80import android.view.ContextThemeWrapper; 81import android.view.DisplayListCanvas; 82import android.view.DragAndDropPermissions; 83import android.view.DragEvent; 84import android.view.Gravity; 85import android.view.InputDevice; 86import android.view.LayoutInflater; 87import android.view.Menu; 88import android.view.MenuItem; 89import android.view.MotionEvent; 90import android.view.RenderNode; 91import android.view.SubMenu; 92import android.view.View; 93import android.view.View.DragShadowBuilder; 94import android.view.View.OnClickListener; 95import android.view.ViewConfiguration; 96import android.view.ViewGroup; 97import android.view.ViewGroup.LayoutParams; 98import android.view.ViewTreeObserver; 99import android.view.WindowManager; 100import android.view.accessibility.AccessibilityNodeInfo; 101import android.view.inputmethod.CorrectionInfo; 102import android.view.inputmethod.CursorAnchorInfo; 103import android.view.inputmethod.EditorInfo; 104import android.view.inputmethod.ExtractedText; 105import android.view.inputmethod.ExtractedTextRequest; 106import android.view.inputmethod.InputConnection; 107import android.view.inputmethod.InputMethodManager; 108import android.view.textclassifier.TextClassificationResult; 109import android.widget.AdapterView.OnItemClickListener; 110import android.widget.TextView.Drawables; 111import android.widget.TextView.OnEditorActionListener; 112 113import com.android.internal.annotations.VisibleForTesting; 114import com.android.internal.logging.MetricsLogger; 115import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 116import com.android.internal.util.ArrayUtils; 117import com.android.internal.util.GrowingArrayUtils; 118import com.android.internal.util.Preconditions; 119import com.android.internal.widget.EditableInputConnection; 120 121import java.lang.annotation.Retention; 122import java.lang.annotation.RetentionPolicy; 123import java.text.BreakIterator; 124import java.util.ArrayList; 125import java.util.Arrays; 126import java.util.Comparator; 127import java.util.HashMap; 128import java.util.List; 129 130 131/** 132 * Helper class used by TextView to handle editable text views. 133 * 134 * @hide 135 */ 136public class Editor { 137 private static final String TAG = "Editor"; 138 private static final boolean DEBUG_UNDO = false; 139 140 static final int BLINK = 500; 141 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 142 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 143 private static final int UNSET_X_VALUE = -1; 144 private static final int UNSET_LINE = -1; 145 // Tag used when the Editor maintains its own separate UndoManager. 146 private static final String UNDO_OWNER_TAG = "Editor"; 147 148 // Ordering constants used to place the Action Mode or context menu items in their menu. 149 private static final int MENU_ITEM_ORDER_ASSIST = 0; 150 private static final int MENU_ITEM_ORDER_UNDO = 2; 151 private static final int MENU_ITEM_ORDER_REDO = 3; 152 private static final int MENU_ITEM_ORDER_CUT = 4; 153 private static final int MENU_ITEM_ORDER_COPY = 5; 154 private static final int MENU_ITEM_ORDER_PASTE = 6; 155 private static final int MENU_ITEM_ORDER_SHARE = 7; 156 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 8; 157 private static final int MENU_ITEM_ORDER_SELECT_ALL = 9; 158 private static final int MENU_ITEM_ORDER_REPLACE = 10; 159 private static final int MENU_ITEM_ORDER_AUTOFILL = 11; 160 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 161 162 // Each Editor manages its own undo stack. 163 private final UndoManager mUndoManager = new UndoManager(); 164 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 165 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 166 boolean mAllowUndo = true; 167 168 // Cursor Controllers. 169 private InsertionPointCursorController mInsertionPointCursorController; 170 SelectionModifierCursorController mSelectionModifierCursorController; 171 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 172 private ActionMode mTextActionMode; 173 private boolean mInsertionControllerEnabled; 174 private boolean mSelectionControllerEnabled; 175 176 // Used to highlight a word when it is corrected by the IME 177 private CorrectionHighlighter mCorrectionHighlighter; 178 179 InputContentType mInputContentType; 180 InputMethodState mInputMethodState; 181 182 private static class TextRenderNode { 183 // Render node has 3 recording states: 184 // 1. Recorded operations are valid. 185 // #needsRecord() returns false, but needsToBeShifted is false. 186 // 2. Recorded operations are not valid, but just the position needed to be updated. 187 // #needsRecord() returns false, but needsToBeShifted is true. 188 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 189 // true. 190 RenderNode renderNode; 191 boolean isDirty; 192 // Becomes true when recorded operations can be reused, but the position has to be updated. 193 boolean needsToBeShifted; 194 public TextRenderNode(String name) { 195 renderNode = RenderNode.create(name, null); 196 isDirty = true; 197 needsToBeShifted = true; 198 } 199 boolean needsRecord() { 200 return isDirty || !renderNode.isValid(); 201 } 202 } 203 private TextRenderNode[] mTextRenderNodes; 204 205 boolean mFrozenWithFocus; 206 boolean mSelectionMoved; 207 boolean mTouchFocusSelected; 208 209 KeyListener mKeyListener; 210 int mInputType = EditorInfo.TYPE_NULL; 211 212 boolean mDiscardNextActionUp; 213 boolean mIgnoreActionUpEvent; 214 215 long mShowCursor; 216 private Blink mBlink; 217 218 boolean mCursorVisible = true; 219 boolean mSelectAllOnFocus; 220 boolean mTextIsSelectable; 221 222 CharSequence mError; 223 boolean mErrorWasChanged; 224 private ErrorPopup mErrorPopup; 225 226 /** 227 * This flag is set if the TextView tries to display an error before it 228 * is attached to the window (so its position is still unknown). 229 * It causes the error to be shown later, when onAttachedToWindow() 230 * is called. 231 */ 232 private boolean mShowErrorAfterAttach; 233 234 boolean mInBatchEditControllers; 235 boolean mShowSoftInputOnFocus = true; 236 private boolean mPreserveSelection; 237 private boolean mRestartActionModeOnNextRefresh; 238 239 private SelectionActionModeHelper mSelectionActionModeHelper; 240 241 boolean mIsBeingLongClicked; 242 243 private SuggestionsPopupWindow mSuggestionsPopupWindow; 244 SuggestionRangeSpan mSuggestionRangeSpan; 245 private Runnable mShowSuggestionRunnable; 246 247 final Drawable[] mCursorDrawable = new Drawable[2]; 248 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 249 250 private Drawable mSelectHandleLeft; 251 private Drawable mSelectHandleRight; 252 private Drawable mSelectHandleCenter; 253 254 // Global listener that detects changes in the global position of the TextView 255 private PositionListener mPositionListener; 256 257 private float mLastDownPositionX, mLastDownPositionY; 258 private float mContextMenuAnchorX, mContextMenuAnchorY; 259 Callback mCustomSelectionActionModeCallback; 260 Callback mCustomInsertionActionModeCallback; 261 262 // Set when this TextView gained focus with some text selected. Will start selection mode. 263 boolean mCreatedWithASelection; 264 265 // Indicates the current tap state (first tap, double tap, or triple click). 266 private int mTapState = TAP_STATE_INITIAL; 267 private long mLastTouchUpTime = 0; 268 private static final int TAP_STATE_INITIAL = 0; 269 private static final int TAP_STATE_FIRST_TAP = 1; 270 private static final int TAP_STATE_DOUBLE_TAP = 2; 271 // Only for mouse input. 272 private static final int TAP_STATE_TRIPLE_CLICK = 3; 273 274 // The button state as of the last time #onTouchEvent is called. 275 private int mLastButtonState; 276 277 private Runnable mInsertionActionModeRunnable; 278 279 // The span controller helps monitoring the changes to which the Editor needs to react: 280 // - EasyEditSpans, for which we have some UI to display on attach and on hide 281 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 282 private SpanController mSpanController; 283 284 private WordIterator mWordIterator; 285 SpellChecker mSpellChecker; 286 287 // This word iterator is set with text and used to determine word boundaries 288 // when a user is selecting text. 289 private WordIterator mWordIteratorWithText; 290 // Indicate that the text in the word iterator needs to be updated. 291 private boolean mUpdateWordIteratorText; 292 293 private Rect mTempRect; 294 295 private final TextView mTextView; 296 297 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 298 299 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 300 new CursorAnchorInfoNotifier(); 301 302 private final Runnable mShowFloatingToolbar = new Runnable() { 303 @Override 304 public void run() { 305 if (mTextActionMode != null) { 306 mTextActionMode.hide(0); // hide off. 307 } 308 } 309 }; 310 311 boolean mIsInsertionActionModeStartPending = false; 312 313 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 314 315 Editor(TextView textView) { 316 mTextView = textView; 317 // Synchronize the filter list, which places the undo input filter at the end. 318 mTextView.setFilters(mTextView.getFilters()); 319 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 320 } 321 322 ParcelableParcel saveInstanceState() { 323 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 324 Parcel parcel = state.getParcel(); 325 mUndoManager.saveInstanceState(parcel); 326 mUndoInputFilter.saveInstanceState(parcel); 327 return state; 328 } 329 330 void restoreInstanceState(ParcelableParcel state) { 331 Parcel parcel = state.getParcel(); 332 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 333 mUndoInputFilter.restoreInstanceState(parcel); 334 // Re-associate this object as the owner of undo state. 335 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 336 } 337 338 /** 339 * Forgets all undo and redo operations for this Editor. 340 */ 341 void forgetUndoRedo() { 342 UndoOwner[] owners = { mUndoOwner }; 343 mUndoManager.forgetUndos(owners, -1 /* all */); 344 mUndoManager.forgetRedos(owners, -1 /* all */); 345 } 346 347 boolean canUndo() { 348 UndoOwner[] owners = { mUndoOwner }; 349 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 350 } 351 352 boolean canRedo() { 353 UndoOwner[] owners = { mUndoOwner }; 354 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 355 } 356 357 void undo() { 358 if (!mAllowUndo) { 359 return; 360 } 361 UndoOwner[] owners = { mUndoOwner }; 362 mUndoManager.undo(owners, 1); // Undo 1 action. 363 } 364 365 void redo() { 366 if (!mAllowUndo) { 367 return; 368 } 369 UndoOwner[] owners = { mUndoOwner }; 370 mUndoManager.redo(owners, 1); // Redo 1 action. 371 } 372 373 void replace() { 374 if (mSuggestionsPopupWindow == null) { 375 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 376 } 377 hideCursorAndSpanControllers(); 378 mSuggestionsPopupWindow.show(); 379 380 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 381 Selection.setSelection((Spannable) mTextView.getText(), middle); 382 } 383 384 void onAttachedToWindow() { 385 if (mShowErrorAfterAttach) { 386 showError(); 387 mShowErrorAfterAttach = false; 388 } 389 390 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 391 // No need to create the controller. 392 // The get method will add the listener on controller creation. 393 if (mInsertionPointCursorController != null) { 394 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 395 } 396 if (mSelectionModifierCursorController != null) { 397 mSelectionModifierCursorController.resetTouchOffsets(); 398 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 399 } 400 updateSpellCheckSpans(0, mTextView.getText().length(), 401 true /* create the spell checker if needed */); 402 403 if (mTextView.hasSelection()) { 404 refreshTextActionMode(); 405 } 406 407 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 408 resumeBlink(); 409 } 410 411 void onDetachedFromWindow() { 412 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 413 414 if (mError != null) { 415 hideError(); 416 } 417 418 suspendBlink(); 419 420 if (mInsertionPointCursorController != null) { 421 mInsertionPointCursorController.onDetached(); 422 } 423 424 if (mSelectionModifierCursorController != null) { 425 mSelectionModifierCursorController.onDetached(); 426 } 427 428 if (mShowSuggestionRunnable != null) { 429 mTextView.removeCallbacks(mShowSuggestionRunnable); 430 } 431 432 // Cancel the single tap delayed runnable. 433 if (mInsertionActionModeRunnable != null) { 434 mTextView.removeCallbacks(mInsertionActionModeRunnable); 435 } 436 437 mTextView.removeCallbacks(mShowFloatingToolbar); 438 439 discardTextDisplayLists(); 440 441 if (mSpellChecker != null) { 442 mSpellChecker.closeSession(); 443 // Forces the creation of a new SpellChecker next time this window is created. 444 // Will handle the cases where the settings has been changed in the meantime. 445 mSpellChecker = null; 446 } 447 448 hideCursorAndSpanControllers(); 449 stopTextActionModeWithPreservingSelection(); 450 } 451 452 private void discardTextDisplayLists() { 453 if (mTextRenderNodes != null) { 454 for (int i = 0; i < mTextRenderNodes.length; i++) { 455 RenderNode displayList = mTextRenderNodes[i] != null 456 ? mTextRenderNodes[i].renderNode : null; 457 if (displayList != null && displayList.isValid()) { 458 displayList.discardDisplayList(); 459 } 460 } 461 } 462 } 463 464 private void showError() { 465 if (mTextView.getWindowToken() == null) { 466 mShowErrorAfterAttach = true; 467 return; 468 } 469 470 if (mErrorPopup == null) { 471 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 472 final TextView err = (TextView) inflater.inflate( 473 com.android.internal.R.layout.textview_hint, null); 474 475 final float scale = mTextView.getResources().getDisplayMetrics().density; 476 mErrorPopup = 477 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 478 mErrorPopup.setFocusable(false); 479 // The user is entering text, so the input method is needed. We 480 // don't want the popup to be displayed on top of it. 481 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 482 } 483 484 TextView tv = (TextView) mErrorPopup.getContentView(); 485 chooseSize(mErrorPopup, mError, tv); 486 tv.setText(mError); 487 488 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 489 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 490 } 491 492 public void setError(CharSequence error, Drawable icon) { 493 mError = TextUtils.stringOrSpannedString(error); 494 mErrorWasChanged = true; 495 496 if (mError == null) { 497 setErrorIcon(null); 498 if (mErrorPopup != null) { 499 if (mErrorPopup.isShowing()) { 500 mErrorPopup.dismiss(); 501 } 502 503 mErrorPopup = null; 504 } 505 mShowErrorAfterAttach = false; 506 } else { 507 setErrorIcon(icon); 508 if (mTextView.isFocused()) { 509 showError(); 510 } 511 } 512 } 513 514 private void setErrorIcon(Drawable icon) { 515 Drawables dr = mTextView.mDrawables; 516 if (dr == null) { 517 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 518 } 519 dr.setErrorDrawable(icon, mTextView); 520 521 mTextView.resetResolvedDrawables(); 522 mTextView.invalidate(); 523 mTextView.requestLayout(); 524 } 525 526 private void hideError() { 527 if (mErrorPopup != null) { 528 if (mErrorPopup.isShowing()) { 529 mErrorPopup.dismiss(); 530 } 531 } 532 533 mShowErrorAfterAttach = false; 534 } 535 536 /** 537 * Returns the X offset to make the pointy top of the error point 538 * at the middle of the error icon. 539 */ 540 private int getErrorX() { 541 /* 542 * The "25" is the distance between the point and the right edge 543 * of the background 544 */ 545 final float scale = mTextView.getResources().getDisplayMetrics().density; 546 547 final Drawables dr = mTextView.mDrawables; 548 549 final int layoutDirection = mTextView.getLayoutDirection(); 550 int errorX; 551 int offset; 552 switch (layoutDirection) { 553 default: 554 case View.LAYOUT_DIRECTION_LTR: 555 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 556 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 557 - mTextView.getPaddingRight() + offset; 558 break; 559 case View.LAYOUT_DIRECTION_RTL: 560 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 561 errorX = mTextView.getPaddingLeft() + offset; 562 break; 563 } 564 return errorX; 565 } 566 567 /** 568 * Returns the Y offset to make the pointy top of the error point 569 * at the bottom of the error icon. 570 */ 571 private int getErrorY() { 572 /* 573 * Compound, not extended, because the icon is not clipped 574 * if the text height is smaller. 575 */ 576 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 577 int vspace = mTextView.getBottom() - mTextView.getTop() 578 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 579 580 final Drawables dr = mTextView.mDrawables; 581 582 final int layoutDirection = mTextView.getLayoutDirection(); 583 int height; 584 switch (layoutDirection) { 585 default: 586 case View.LAYOUT_DIRECTION_LTR: 587 height = (dr != null ? dr.mDrawableHeightRight : 0); 588 break; 589 case View.LAYOUT_DIRECTION_RTL: 590 height = (dr != null ? dr.mDrawableHeightLeft : 0); 591 break; 592 } 593 594 int icontop = compoundPaddingTop + (vspace - height) / 2; 595 596 /* 597 * The "2" is the distance between the point and the top edge 598 * of the background. 599 */ 600 final float scale = mTextView.getResources().getDisplayMetrics().density; 601 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 602 } 603 604 void createInputContentTypeIfNeeded() { 605 if (mInputContentType == null) { 606 mInputContentType = new InputContentType(); 607 } 608 } 609 610 void createInputMethodStateIfNeeded() { 611 if (mInputMethodState == null) { 612 mInputMethodState = new InputMethodState(); 613 } 614 } 615 616 boolean isCursorVisible() { 617 // The default value is true, even when there is no associated Editor 618 return mCursorVisible && mTextView.isTextEditable(); 619 } 620 621 void prepareCursorControllers() { 622 boolean windowSupportsHandles = false; 623 624 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 625 if (params instanceof WindowManager.LayoutParams) { 626 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 627 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 628 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 629 } 630 631 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 632 mInsertionControllerEnabled = enabled && isCursorVisible(); 633 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 634 635 if (!mInsertionControllerEnabled) { 636 hideInsertionPointCursorController(); 637 if (mInsertionPointCursorController != null) { 638 mInsertionPointCursorController.onDetached(); 639 mInsertionPointCursorController = null; 640 } 641 } 642 643 if (!mSelectionControllerEnabled) { 644 stopTextActionMode(); 645 if (mSelectionModifierCursorController != null) { 646 mSelectionModifierCursorController.onDetached(); 647 mSelectionModifierCursorController = null; 648 } 649 } 650 } 651 652 void hideInsertionPointCursorController() { 653 if (mInsertionPointCursorController != null) { 654 mInsertionPointCursorController.hide(); 655 } 656 } 657 658 /** 659 * Hides the insertion and span controllers. 660 */ 661 void hideCursorAndSpanControllers() { 662 hideCursorControllers(); 663 hideSpanControllers(); 664 } 665 666 private void hideSpanControllers() { 667 if (mSpanController != null) { 668 mSpanController.hide(); 669 } 670 } 671 672 private void hideCursorControllers() { 673 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 674 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 675 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 676 // to distinguish one from the other. 677 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 678 || !mSuggestionsPopupWindow.isShowingUp())) { 679 // Should be done before hide insertion point controller since it triggers a show of it 680 mSuggestionsPopupWindow.hide(); 681 } 682 hideInsertionPointCursorController(); 683 } 684 685 /** 686 * Create new SpellCheckSpans on the modified region. 687 */ 688 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 689 // Remove spans whose adjacent characters are text not punctuation 690 mTextView.removeAdjacentSuggestionSpans(start); 691 mTextView.removeAdjacentSuggestionSpans(end); 692 693 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 694 && !(mTextView.isInExtractedMode())) { 695 if (mSpellChecker == null && createSpellChecker) { 696 mSpellChecker = new SpellChecker(mTextView); 697 } 698 if (mSpellChecker != null) { 699 mSpellChecker.spellCheck(start, end); 700 } 701 } 702 } 703 704 void onScreenStateChanged(int screenState) { 705 switch (screenState) { 706 case View.SCREEN_STATE_ON: 707 resumeBlink(); 708 break; 709 case View.SCREEN_STATE_OFF: 710 suspendBlink(); 711 break; 712 } 713 } 714 715 private void suspendBlink() { 716 if (mBlink != null) { 717 mBlink.cancel(); 718 } 719 } 720 721 private void resumeBlink() { 722 if (mBlink != null) { 723 mBlink.uncancel(); 724 makeBlink(); 725 } 726 } 727 728 void adjustInputType(boolean password, boolean passwordInputType, 729 boolean webPasswordInputType, boolean numberPasswordInputType) { 730 // mInputType has been set from inputType, possibly modified by mInputMethod. 731 // Specialize mInputType to [web]password if we have a text class and the original input 732 // type was a password. 733 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 734 if (password || passwordInputType) { 735 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 736 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 737 } 738 if (webPasswordInputType) { 739 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 740 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 741 } 742 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 743 if (numberPasswordInputType) { 744 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 745 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 746 } 747 } 748 } 749 750 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 751 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 752 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 753 754 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 755 com.android.internal.R.dimen.textview_error_popup_default_width); 756 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 757 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 758 float max = 0; 759 for (int i = 0; i < l.getLineCount(); i++) { 760 max = Math.max(max, l.getLineWidth(i)); 761 } 762 763 /* 764 * Now set the popup size to be big enough for the text plus the border capped 765 * to DEFAULT_MAX_POPUP_WIDTH 766 */ 767 pop.setWidth(wid + (int) Math.ceil(max)); 768 pop.setHeight(ht + l.getHeight()); 769 } 770 771 void setFrame() { 772 if (mErrorPopup != null) { 773 TextView tv = (TextView) mErrorPopup.getContentView(); 774 chooseSize(mErrorPopup, mError, tv); 775 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 776 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 777 } 778 } 779 780 private int getWordStart(int offset) { 781 // FIXME - For this and similar methods we're not doing anything to check if there's 782 // a LocaleSpan in the text, this may be something we should try handling or checking for. 783 int retOffset = getWordIteratorWithText().prevBoundary(offset); 784 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 785 // On punctuation boundary or within group of punctuation, find punctuation start. 786 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 787 } else { 788 // Not on a punctuation boundary, find the word start. 789 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 790 } 791 if (retOffset == BreakIterator.DONE) { 792 return offset; 793 } 794 return retOffset; 795 } 796 797 private int getWordEnd(int offset) { 798 int retOffset = getWordIteratorWithText().nextBoundary(offset); 799 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 800 // On punctuation boundary or within group of punctuation, find punctuation end. 801 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 802 } else { 803 // Not on a punctuation boundary, find the word end. 804 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 805 } 806 if (retOffset == BreakIterator.DONE) { 807 return offset; 808 } 809 return retOffset; 810 } 811 812 private boolean needsToSelectAllToSelectWordOrParagraph() { 813 if (mTextView.hasPasswordTransformationMethod()) { 814 // Always select all on a password field. 815 // Cut/copy menu entries are not available for passwords, but being able to select all 816 // is however useful to delete or paste to replace the entire content. 817 return true; 818 } 819 820 int inputType = mTextView.getInputType(); 821 int klass = inputType & InputType.TYPE_MASK_CLASS; 822 int variation = inputType & InputType.TYPE_MASK_VARIATION; 823 824 // Specific text field types: select the entire text for these 825 if (klass == InputType.TYPE_CLASS_NUMBER 826 || klass == InputType.TYPE_CLASS_PHONE 827 || klass == InputType.TYPE_CLASS_DATETIME 828 || variation == InputType.TYPE_TEXT_VARIATION_URI 829 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 830 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 831 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 832 return true; 833 } 834 return false; 835 } 836 837 /** 838 * Adjusts selection to the word under last touch offset. Return true if the operation was 839 * successfully performed. 840 */ 841 private boolean selectCurrentWord() { 842 if (!mTextView.canSelectText()) { 843 return false; 844 } 845 846 if (needsToSelectAllToSelectWordOrParagraph()) { 847 return mTextView.selectAllText(); 848 } 849 850 long lastTouchOffsets = getLastTouchOffsets(); 851 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 852 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 853 854 // Safety check in case standard touch event handling has been bypassed 855 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 856 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 857 858 int selectionStart, selectionEnd; 859 860 // If a URLSpan (web address, email, phone...) is found at that position, select it. 861 URLSpan[] urlSpans = 862 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 863 if (urlSpans.length >= 1) { 864 URLSpan urlSpan = urlSpans[0]; 865 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 866 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 867 } else { 868 // FIXME - We should check if there's a LocaleSpan in the text, this may be 869 // something we should try handling or checking for. 870 final WordIterator wordIterator = getWordIterator(); 871 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 872 873 selectionStart = wordIterator.getBeginning(minOffset); 874 selectionEnd = wordIterator.getEnd(maxOffset); 875 876 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 877 || selectionStart == selectionEnd) { 878 // Possible when the word iterator does not properly handle the text's language 879 long range = getCharClusterRange(minOffset); 880 selectionStart = TextUtils.unpackRangeStartFromLong(range); 881 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 882 } 883 } 884 885 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 886 return selectionEnd > selectionStart; 887 } 888 889 /** 890 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 891 * successfully performed. 892 */ 893 private boolean selectCurrentParagraph() { 894 if (!mTextView.canSelectText()) { 895 return false; 896 } 897 898 if (needsToSelectAllToSelectWordOrParagraph()) { 899 return mTextView.selectAllText(); 900 } 901 902 long lastTouchOffsets = getLastTouchOffsets(); 903 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 904 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 905 906 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 907 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 908 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 909 if (start < end) { 910 Selection.setSelection((Spannable) mTextView.getText(), start, end); 911 return true; 912 } 913 return false; 914 } 915 916 /** 917 * Get the minimum range of paragraphs that contains startOffset and endOffset. 918 */ 919 private long getParagraphsRange(int startOffset, int endOffset) { 920 final Layout layout = mTextView.getLayout(); 921 if (layout == null) { 922 return TextUtils.packRangeInLong(-1, -1); 923 } 924 final CharSequence text = mTextView.getText(); 925 int minLine = layout.getLineForOffset(startOffset); 926 // Search paragraph start. 927 while (minLine > 0) { 928 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 929 if (text.charAt(prevLineEndOffset - 1) == '\n') { 930 break; 931 } 932 minLine--; 933 } 934 int maxLine = layout.getLineForOffset(endOffset); 935 // Search paragraph end. 936 while (maxLine < layout.getLineCount() - 1) { 937 final int lineEndOffset = layout.getLineEnd(maxLine); 938 if (text.charAt(lineEndOffset - 1) == '\n') { 939 break; 940 } 941 maxLine++; 942 } 943 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 944 } 945 946 void onLocaleChanged() { 947 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 948 // proper new locale 949 mWordIterator = null; 950 mWordIteratorWithText = null; 951 } 952 953 public WordIterator getWordIterator() { 954 if (mWordIterator == null) { 955 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 956 } 957 return mWordIterator; 958 } 959 960 private WordIterator getWordIteratorWithText() { 961 if (mWordIteratorWithText == null) { 962 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 963 mUpdateWordIteratorText = true; 964 } 965 if (mUpdateWordIteratorText) { 966 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 967 // to the user's selection is needed. A possible solution would be to 968 // copy some number N of characters near the selection and then when the 969 // user approaches N then we'd do another copy of the next N characters. 970 CharSequence text = mTextView.getText(); 971 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 972 mUpdateWordIteratorText = false; 973 } 974 return mWordIteratorWithText; 975 } 976 977 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 978 final Layout layout = mTextView.getLayout(); 979 if (layout == null) return offset; 980 return findAfterGivenOffset == layout.isRtlCharAt(offset) 981 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 982 } 983 984 private long getCharClusterRange(int offset) { 985 final int textLength = mTextView.getText().length(); 986 if (offset < textLength) { 987 final int clusterEndOffset = getNextCursorOffset(offset, true); 988 return TextUtils.packRangeInLong( 989 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 990 } 991 if (offset - 1 >= 0) { 992 final int clusterStartOffset = getNextCursorOffset(offset, false); 993 return TextUtils.packRangeInLong(clusterStartOffset, 994 getNextCursorOffset(clusterStartOffset, true)); 995 } 996 return TextUtils.packRangeInLong(offset, offset); 997 } 998 999 private boolean touchPositionIsInSelection() { 1000 int selectionStart = mTextView.getSelectionStart(); 1001 int selectionEnd = mTextView.getSelectionEnd(); 1002 1003 if (selectionStart == selectionEnd) { 1004 return false; 1005 } 1006 1007 if (selectionStart > selectionEnd) { 1008 int tmp = selectionStart; 1009 selectionStart = selectionEnd; 1010 selectionEnd = tmp; 1011 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1012 } 1013 1014 SelectionModifierCursorController selectionController = getSelectionController(); 1015 int minOffset = selectionController.getMinTouchOffset(); 1016 int maxOffset = selectionController.getMaxTouchOffset(); 1017 1018 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1019 } 1020 1021 private PositionListener getPositionListener() { 1022 if (mPositionListener == null) { 1023 mPositionListener = new PositionListener(); 1024 } 1025 return mPositionListener; 1026 } 1027 1028 private interface TextViewPositionListener { 1029 public void updatePosition(int parentPositionX, int parentPositionY, 1030 boolean parentPositionChanged, boolean parentScrolled); 1031 } 1032 1033 private boolean isOffsetVisible(int offset) { 1034 Layout layout = mTextView.getLayout(); 1035 if (layout == null) return false; 1036 1037 final int line = layout.getLineForOffset(offset); 1038 final int lineBottom = layout.getLineBottom(line); 1039 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1040 return mTextView.isPositionVisible( 1041 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1042 lineBottom + mTextView.viewportToContentVerticalOffset()); 1043 } 1044 1045 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1046 * in the view. Returns false when the position is in the empty space of left/right of text. 1047 */ 1048 private boolean isPositionOnText(float x, float y) { 1049 Layout layout = mTextView.getLayout(); 1050 if (layout == null) return false; 1051 1052 final int line = mTextView.getLineAtCoordinate(y); 1053 x = mTextView.convertToLocalHorizontalCoordinate(x); 1054 1055 if (x < layout.getLineLeft(line)) return false; 1056 if (x > layout.getLineRight(line)) return false; 1057 return true; 1058 } 1059 1060 private void startDragAndDrop() { 1061 // TODO: Fix drag and drop in full screen extracted mode. 1062 if (mTextView.isInExtractedMode()) { 1063 return; 1064 } 1065 final int start = mTextView.getSelectionStart(); 1066 final int end = mTextView.getSelectionEnd(); 1067 CharSequence selectedText = mTextView.getTransformedText(start, end); 1068 ClipData data = ClipData.newPlainText(null, selectedText); 1069 DragLocalState localState = new DragLocalState(mTextView, start, end); 1070 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1071 View.DRAG_FLAG_GLOBAL); 1072 stopTextActionMode(); 1073 if (hasSelectionController()) { 1074 getSelectionController().resetTouchOffsets(); 1075 } 1076 } 1077 1078 public boolean performLongClick(boolean handled) { 1079 // Long press in empty space moves cursor and starts the insertion action mode. 1080 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1081 && mInsertionControllerEnabled) { 1082 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1083 mLastDownPositionY); 1084 Selection.setSelection((Spannable) mTextView.getText(), offset); 1085 getInsertionController().show(); 1086 mIsInsertionActionModeStartPending = true; 1087 handled = true; 1088 MetricsLogger.action( 1089 mTextView.getContext(), 1090 MetricsEvent.TEXT_LONGPRESS, 1091 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1092 } 1093 1094 if (!handled && mTextActionMode != null) { 1095 if (touchPositionIsInSelection()) { 1096 startDragAndDrop(); 1097 MetricsLogger.action( 1098 mTextView.getContext(), 1099 MetricsEvent.TEXT_LONGPRESS, 1100 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1101 } else { 1102 stopTextActionMode(); 1103 selectCurrentWordAndStartDrag(); 1104 MetricsLogger.action( 1105 mTextView.getContext(), 1106 MetricsEvent.TEXT_LONGPRESS, 1107 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1108 } 1109 handled = true; 1110 } 1111 1112 // Start a new selection 1113 if (!handled) { 1114 handled = selectCurrentWordAndStartDrag(); 1115 if (handled) { 1116 MetricsLogger.action( 1117 mTextView.getContext(), 1118 MetricsEvent.TEXT_LONGPRESS, 1119 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1120 } 1121 } 1122 1123 return handled; 1124 } 1125 1126 private long getLastTouchOffsets() { 1127 SelectionModifierCursorController selectionController = getSelectionController(); 1128 final int minOffset = selectionController.getMinTouchOffset(); 1129 final int maxOffset = selectionController.getMaxTouchOffset(); 1130 return TextUtils.packRangeInLong(minOffset, maxOffset); 1131 } 1132 1133 void onFocusChanged(boolean focused, int direction) { 1134 mShowCursor = SystemClock.uptimeMillis(); 1135 ensureEndedBatchEdit(); 1136 1137 if (focused) { 1138 int selStart = mTextView.getSelectionStart(); 1139 int selEnd = mTextView.getSelectionEnd(); 1140 1141 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1142 // mode for these, unless there was a specific selection already started. 1143 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1144 && selEnd == mTextView.getText().length(); 1145 1146 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1147 && !isFocusHighlighted; 1148 1149 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1150 // If a tap was used to give focus to that view, move cursor at tap position. 1151 // Has to be done before onTakeFocus, which can be overloaded. 1152 final int lastTapPosition = getLastTapPosition(); 1153 if (lastTapPosition >= 0) { 1154 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1155 } 1156 1157 // Note this may have to be moved out of the Editor class 1158 MovementMethod mMovement = mTextView.getMovementMethod(); 1159 if (mMovement != null) { 1160 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1161 } 1162 1163 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1164 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1165 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1166 // This special case ensure that we keep current selection in that case. 1167 // It would be better to know why the DecorView does not have focus at that time. 1168 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1169 && selStart >= 0 && selEnd >= 0) { 1170 /* 1171 * Someone intentionally set the selection, so let them 1172 * do whatever it is that they wanted to do instead of 1173 * the default on-focus behavior. We reset the selection 1174 * here instead of just skipping the onTakeFocus() call 1175 * because some movement methods do something other than 1176 * just setting the selection in theirs and we still 1177 * need to go through that path. 1178 */ 1179 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1180 } 1181 1182 if (mSelectAllOnFocus) { 1183 mTextView.selectAllText(); 1184 } 1185 1186 mTouchFocusSelected = true; 1187 } 1188 1189 mFrozenWithFocus = false; 1190 mSelectionMoved = false; 1191 1192 if (mError != null) { 1193 showError(); 1194 } 1195 1196 makeBlink(); 1197 } else { 1198 if (mError != null) { 1199 hideError(); 1200 } 1201 // Don't leave us in the middle of a batch edit. 1202 mTextView.onEndBatchEdit(); 1203 1204 if (mTextView.isInExtractedMode()) { 1205 hideCursorAndSpanControllers(); 1206 stopTextActionModeWithPreservingSelection(); 1207 } else { 1208 hideCursorAndSpanControllers(); 1209 if (mTextView.isTemporarilyDetached()) { 1210 stopTextActionModeWithPreservingSelection(); 1211 } else { 1212 stopTextActionMode(); 1213 } 1214 downgradeEasyCorrectionSpans(); 1215 } 1216 // No need to create the controller 1217 if (mSelectionModifierCursorController != null) { 1218 mSelectionModifierCursorController.resetTouchOffsets(); 1219 } 1220 } 1221 } 1222 1223 /** 1224 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1225 * span. 1226 */ 1227 private void downgradeEasyCorrectionSpans() { 1228 CharSequence text = mTextView.getText(); 1229 if (text instanceof Spannable) { 1230 Spannable spannable = (Spannable) text; 1231 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1232 spannable.length(), SuggestionSpan.class); 1233 for (int i = 0; i < suggestionSpans.length; i++) { 1234 int flags = suggestionSpans[i].getFlags(); 1235 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1236 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1237 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1238 suggestionSpans[i].setFlags(flags); 1239 } 1240 } 1241 } 1242 } 1243 1244 void sendOnTextChanged(int start, int after) { 1245 updateSpellCheckSpans(start, start + after, false); 1246 1247 // Flip flag to indicate the word iterator needs to have the text reset. 1248 mUpdateWordIteratorText = true; 1249 1250 // Hide the controllers as soon as text is modified (typing, procedural...) 1251 // We do not hide the span controllers, since they can be added when a new text is 1252 // inserted into the text view (voice IME). 1253 hideCursorControllers(); 1254 // Reset drag accelerator. 1255 if (mSelectionModifierCursorController != null) { 1256 mSelectionModifierCursorController.resetTouchOffsets(); 1257 } 1258 stopTextActionMode(); 1259 } 1260 1261 private int getLastTapPosition() { 1262 // No need to create the controller at that point, no last tap position saved 1263 if (mSelectionModifierCursorController != null) { 1264 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1265 if (lastTapPosition >= 0) { 1266 // Safety check, should not be possible. 1267 if (lastTapPosition > mTextView.getText().length()) { 1268 lastTapPosition = mTextView.getText().length(); 1269 } 1270 return lastTapPosition; 1271 } 1272 } 1273 1274 return -1; 1275 } 1276 1277 void onWindowFocusChanged(boolean hasWindowFocus) { 1278 if (hasWindowFocus) { 1279 if (mBlink != null) { 1280 mBlink.uncancel(); 1281 makeBlink(); 1282 } 1283 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1284 refreshTextActionMode(); 1285 } 1286 } else { 1287 if (mBlink != null) { 1288 mBlink.cancel(); 1289 } 1290 if (mInputContentType != null) { 1291 mInputContentType.enterDown = false; 1292 } 1293 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1294 hideCursorAndSpanControllers(); 1295 stopTextActionModeWithPreservingSelection(); 1296 if (mSuggestionsPopupWindow != null) { 1297 mSuggestionsPopupWindow.onParentLostFocus(); 1298 } 1299 1300 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1301 ensureEndedBatchEdit(); 1302 } 1303 } 1304 1305 private void updateTapState(MotionEvent event) { 1306 final int action = event.getActionMasked(); 1307 if (action == MotionEvent.ACTION_DOWN) { 1308 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1309 // Detect double tap and triple click. 1310 if (((mTapState == TAP_STATE_FIRST_TAP) 1311 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1312 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1313 <= ViewConfiguration.getDoubleTapTimeout()) { 1314 if (mTapState == TAP_STATE_FIRST_TAP) { 1315 mTapState = TAP_STATE_DOUBLE_TAP; 1316 } else { 1317 mTapState = TAP_STATE_TRIPLE_CLICK; 1318 } 1319 } else { 1320 mTapState = TAP_STATE_FIRST_TAP; 1321 } 1322 } 1323 if (action == MotionEvent.ACTION_UP) { 1324 mLastTouchUpTime = SystemClock.uptimeMillis(); 1325 } 1326 } 1327 1328 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1329 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1330 return false; 1331 } 1332 final boolean primaryButtonStateChanged = 1333 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1334 final int action = event.getActionMasked(); 1335 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1336 && !primaryButtonStateChanged) { 1337 return true; 1338 } 1339 if (action == MotionEvent.ACTION_MOVE 1340 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1341 return true; 1342 } 1343 return false; 1344 } 1345 1346 void onTouchEvent(MotionEvent event) { 1347 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1348 mLastButtonState = event.getButtonState(); 1349 if (filterOutEvent) { 1350 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1351 mDiscardNextActionUp = true; 1352 } 1353 return; 1354 } 1355 updateTapState(event); 1356 updateFloatingToolbarVisibility(event); 1357 1358 if (hasSelectionController()) { 1359 getSelectionController().onTouchEvent(event); 1360 } 1361 1362 if (mShowSuggestionRunnable != null) { 1363 mTextView.removeCallbacks(mShowSuggestionRunnable); 1364 mShowSuggestionRunnable = null; 1365 } 1366 1367 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1368 mLastDownPositionX = event.getX(); 1369 mLastDownPositionY = event.getY(); 1370 1371 // Reset this state; it will be re-set if super.onTouchEvent 1372 // causes focus to move to the view. 1373 mTouchFocusSelected = false; 1374 mIgnoreActionUpEvent = false; 1375 } 1376 } 1377 1378 private void updateFloatingToolbarVisibility(MotionEvent event) { 1379 if (mTextActionMode != null) { 1380 switch (event.getActionMasked()) { 1381 case MotionEvent.ACTION_MOVE: 1382 hideFloatingToolbar(); 1383 break; 1384 case MotionEvent.ACTION_UP: // fall through 1385 case MotionEvent.ACTION_CANCEL: 1386 showFloatingToolbar(); 1387 } 1388 } 1389 } 1390 1391 private void hideFloatingToolbar() { 1392 if (mTextActionMode != null) { 1393 mTextView.removeCallbacks(mShowFloatingToolbar); 1394 mTextActionMode.hide(ActionMode.DEFAULT_HIDE_DURATION); 1395 } 1396 } 1397 1398 private void showFloatingToolbar() { 1399 if (mTextActionMode != null) { 1400 // Delay "show" so it doesn't interfere with click confirmations 1401 // or double-clicks that could "dismiss" the floating toolbar. 1402 int delay = ViewConfiguration.getDoubleTapTimeout(); 1403 mTextView.postDelayed(mShowFloatingToolbar, delay); 1404 } 1405 } 1406 1407 public void beginBatchEdit() { 1408 mInBatchEditControllers = true; 1409 final InputMethodState ims = mInputMethodState; 1410 if (ims != null) { 1411 int nesting = ++ims.mBatchEditNesting; 1412 if (nesting == 1) { 1413 ims.mCursorChanged = false; 1414 ims.mChangedDelta = 0; 1415 if (ims.mContentChanged) { 1416 // We already have a pending change from somewhere else, 1417 // so turn this into a full update. 1418 ims.mChangedStart = 0; 1419 ims.mChangedEnd = mTextView.getText().length(); 1420 } else { 1421 ims.mChangedStart = EXTRACT_UNKNOWN; 1422 ims.mChangedEnd = EXTRACT_UNKNOWN; 1423 ims.mContentChanged = false; 1424 } 1425 mUndoInputFilter.beginBatchEdit(); 1426 mTextView.onBeginBatchEdit(); 1427 } 1428 } 1429 } 1430 1431 public void endBatchEdit() { 1432 mInBatchEditControllers = false; 1433 final InputMethodState ims = mInputMethodState; 1434 if (ims != null) { 1435 int nesting = --ims.mBatchEditNesting; 1436 if (nesting == 0) { 1437 finishBatchEdit(ims); 1438 } 1439 } 1440 } 1441 1442 void ensureEndedBatchEdit() { 1443 final InputMethodState ims = mInputMethodState; 1444 if (ims != null && ims.mBatchEditNesting != 0) { 1445 ims.mBatchEditNesting = 0; 1446 finishBatchEdit(ims); 1447 } 1448 } 1449 1450 void finishBatchEdit(final InputMethodState ims) { 1451 mTextView.onEndBatchEdit(); 1452 mUndoInputFilter.endBatchEdit(); 1453 1454 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1455 mTextView.updateAfterEdit(); 1456 reportExtractedText(); 1457 } else if (ims.mCursorChanged) { 1458 // Cheesy way to get us to report the current cursor location. 1459 mTextView.invalidateCursor(); 1460 } 1461 // sendUpdateSelection knows to avoid sending if the selection did 1462 // not actually change. 1463 sendUpdateSelection(); 1464 1465 // Show drag handles if they were blocked by batch edit mode. 1466 if (mTextActionMode != null) { 1467 final CursorController cursorController = mTextView.hasSelection() 1468 ? getSelectionController() : getInsertionController(); 1469 if (cursorController != null && !cursorController.isActive() 1470 && !cursorController.isCursorBeingModified()) { 1471 cursorController.show(); 1472 } 1473 } 1474 } 1475 1476 static final int EXTRACT_NOTHING = -2; 1477 static final int EXTRACT_UNKNOWN = -1; 1478 1479 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1480 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1481 EXTRACT_UNKNOWN, outText); 1482 } 1483 1484 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1485 int partialStartOffset, int partialEndOffset, int delta, 1486 @Nullable ExtractedText outText) { 1487 if (request == null || outText == null) { 1488 return false; 1489 } 1490 1491 final CharSequence content = mTextView.getText(); 1492 if (content == null) { 1493 return false; 1494 } 1495 1496 if (partialStartOffset != EXTRACT_NOTHING) { 1497 final int N = content.length(); 1498 if (partialStartOffset < 0) { 1499 outText.partialStartOffset = outText.partialEndOffset = -1; 1500 partialStartOffset = 0; 1501 partialEndOffset = N; 1502 } else { 1503 // Now use the delta to determine the actual amount of text 1504 // we need. 1505 partialEndOffset += delta; 1506 // Adjust offsets to ensure we contain full spans. 1507 if (content instanceof Spanned) { 1508 Spanned spanned = (Spanned) content; 1509 Object[] spans = spanned.getSpans(partialStartOffset, 1510 partialEndOffset, ParcelableSpan.class); 1511 int i = spans.length; 1512 while (i > 0) { 1513 i--; 1514 int j = spanned.getSpanStart(spans[i]); 1515 if (j < partialStartOffset) partialStartOffset = j; 1516 j = spanned.getSpanEnd(spans[i]); 1517 if (j > partialEndOffset) partialEndOffset = j; 1518 } 1519 } 1520 outText.partialStartOffset = partialStartOffset; 1521 outText.partialEndOffset = partialEndOffset - delta; 1522 1523 if (partialStartOffset > N) { 1524 partialStartOffset = N; 1525 } else if (partialStartOffset < 0) { 1526 partialStartOffset = 0; 1527 } 1528 if (partialEndOffset > N) { 1529 partialEndOffset = N; 1530 } else if (partialEndOffset < 0) { 1531 partialEndOffset = 0; 1532 } 1533 } 1534 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1535 outText.text = content.subSequence(partialStartOffset, 1536 partialEndOffset); 1537 } else { 1538 outText.text = TextUtils.substring(content, partialStartOffset, 1539 partialEndOffset); 1540 } 1541 } else { 1542 outText.partialStartOffset = 0; 1543 outText.partialEndOffset = 0; 1544 outText.text = ""; 1545 } 1546 outText.flags = 0; 1547 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1548 outText.flags |= ExtractedText.FLAG_SELECTING; 1549 } 1550 if (mTextView.isSingleLine()) { 1551 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1552 } 1553 outText.startOffset = 0; 1554 outText.selectionStart = mTextView.getSelectionStart(); 1555 outText.selectionEnd = mTextView.getSelectionEnd(); 1556 return true; 1557 } 1558 1559 boolean reportExtractedText() { 1560 final Editor.InputMethodState ims = mInputMethodState; 1561 if (ims != null) { 1562 final boolean contentChanged = ims.mContentChanged; 1563 if (contentChanged || ims.mSelectionModeChanged) { 1564 ims.mContentChanged = false; 1565 ims.mSelectionModeChanged = false; 1566 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1567 if (req != null) { 1568 InputMethodManager imm = InputMethodManager.peekInstance(); 1569 if (imm != null) { 1570 if (TextView.DEBUG_EXTRACT) { 1571 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1572 + ims.mChangedStart 1573 + " end=" + ims.mChangedEnd 1574 + " delta=" + ims.mChangedDelta); 1575 } 1576 if (ims.mChangedStart < 0 && !contentChanged) { 1577 ims.mChangedStart = EXTRACT_NOTHING; 1578 } 1579 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1580 ims.mChangedDelta, ims.mExtractedText)) { 1581 if (TextView.DEBUG_EXTRACT) { 1582 Log.v(TextView.LOG_TAG, 1583 "Reporting extracted start=" 1584 + ims.mExtractedText.partialStartOffset 1585 + " end=" + ims.mExtractedText.partialEndOffset 1586 + ": " + ims.mExtractedText.text); 1587 } 1588 1589 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1590 ims.mChangedStart = EXTRACT_UNKNOWN; 1591 ims.mChangedEnd = EXTRACT_UNKNOWN; 1592 ims.mChangedDelta = 0; 1593 ims.mContentChanged = false; 1594 return true; 1595 } 1596 } 1597 } 1598 } 1599 } 1600 return false; 1601 } 1602 1603 private void sendUpdateSelection() { 1604 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1605 final InputMethodManager imm = InputMethodManager.peekInstance(); 1606 if (null != imm) { 1607 final int selectionStart = mTextView.getSelectionStart(); 1608 final int selectionEnd = mTextView.getSelectionEnd(); 1609 int candStart = -1; 1610 int candEnd = -1; 1611 if (mTextView.getText() instanceof Spannable) { 1612 final Spannable sp = (Spannable) mTextView.getText(); 1613 candStart = EditableInputConnection.getComposingSpanStart(sp); 1614 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1615 } 1616 // InputMethodManager#updateSelection skips sending the message if 1617 // none of the parameters have changed since the last time we called it. 1618 imm.updateSelection(mTextView, 1619 selectionStart, selectionEnd, candStart, candEnd); 1620 } 1621 } 1622 } 1623 1624 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1625 int cursorOffsetVertical) { 1626 final int selectionStart = mTextView.getSelectionStart(); 1627 final int selectionEnd = mTextView.getSelectionEnd(); 1628 1629 final InputMethodState ims = mInputMethodState; 1630 if (ims != null && ims.mBatchEditNesting == 0) { 1631 InputMethodManager imm = InputMethodManager.peekInstance(); 1632 if (imm != null) { 1633 if (imm.isActive(mTextView)) { 1634 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1635 // We are in extract mode and the content has changed 1636 // in some way... just report complete new text to the 1637 // input method. 1638 reportExtractedText(); 1639 } 1640 } 1641 } 1642 } 1643 1644 if (mCorrectionHighlighter != null) { 1645 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1646 } 1647 1648 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1649 drawCursor(canvas, cursorOffsetVertical); 1650 // Rely on the drawable entirely, do not draw the cursor line. 1651 // Has to be done after the IMM related code above which relies on the highlight. 1652 highlight = null; 1653 } 1654 1655 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1656 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1657 cursorOffsetVertical); 1658 } else { 1659 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1660 } 1661 } 1662 1663 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1664 Paint highlightPaint, int cursorOffsetVertical) { 1665 final long lineRange = layout.getLineRangeForDraw(canvas); 1666 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1667 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1668 if (lastLine < 0) return; 1669 1670 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1671 firstLine, lastLine); 1672 1673 if (layout instanceof DynamicLayout) { 1674 if (mTextRenderNodes == null) { 1675 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1676 } 1677 1678 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1679 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1680 int[] blockIndices = dynamicLayout.getBlockIndices(); 1681 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1682 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1683 1684 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1685 if (blockSet != null) { 1686 for (int i = 0; i < blockSet.size(); i++) { 1687 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1688 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1689 && mTextRenderNodes[blockIndex] != null) { 1690 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1691 } 1692 } 1693 } 1694 1695 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1696 if (startBlock < 0) { 1697 startBlock = -(startBlock + 1); 1698 } 1699 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1700 1701 int startIndexToFindAvailableRenderNode = 0; 1702 int lastIndex = numberOfBlocks; 1703 1704 for (int i = startBlock; i < numberOfBlocks; i++) { 1705 final int blockIndex = blockIndices[i]; 1706 if (i >= indexFirstChangedBlock 1707 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1708 && mTextRenderNodes[blockIndex] != null) { 1709 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1710 } 1711 if (blockEndLines[i] < firstLine) { 1712 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1713 // be redrawn after they get scrolled into drawing range. 1714 continue; 1715 } 1716 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1717 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1718 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1719 if (blockEndLines[i] >= lastLine) { 1720 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1721 break; 1722 } 1723 } 1724 if (blockSet != null) { 1725 for (int i = 0; i < blockSet.size(); i++) { 1726 final int block = blockSet.valueAt(i); 1727 final int blockIndex = dynamicLayout.getBlockIndex(block); 1728 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1729 || mTextRenderNodes[blockIndex] == null 1730 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1731 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1732 layout, highlight, highlightPaint, cursorOffsetVertical, 1733 blockEndLines, blockIndices, block, numberOfBlocks, 1734 startIndexToFindAvailableRenderNode); 1735 } 1736 } 1737 } 1738 1739 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1740 } else { 1741 // Boring layout is used for empty and hint text 1742 layout.drawText(canvas, firstLine, lastLine); 1743 } 1744 } 1745 1746 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1747 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1748 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1749 int startIndexToFindAvailableRenderNode) { 1750 final int blockEndLine = blockEndLines[blockInfoIndex]; 1751 int blockIndex = blockIndices[blockInfoIndex]; 1752 1753 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1754 if (blockIsInvalid) { 1755 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1756 startIndexToFindAvailableRenderNode); 1757 // Note how dynamic layout's internal block indices get updated from Editor 1758 blockIndices[blockInfoIndex] = blockIndex; 1759 if (mTextRenderNodes[blockIndex] != null) { 1760 mTextRenderNodes[blockIndex].isDirty = true; 1761 } 1762 startIndexToFindAvailableRenderNode = blockIndex + 1; 1763 } 1764 1765 if (mTextRenderNodes[blockIndex] == null) { 1766 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1767 } 1768 1769 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1770 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1771 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1772 final int blockBeginLine = blockInfoIndex == 0 ? 1773 0 : blockEndLines[blockInfoIndex - 1] + 1; 1774 final int top = layout.getLineTop(blockBeginLine); 1775 final int bottom = layout.getLineBottom(blockEndLine); 1776 int left = 0; 1777 int right = mTextView.getWidth(); 1778 if (mTextView.getHorizontallyScrolling()) { 1779 float min = Float.MAX_VALUE; 1780 float max = Float.MIN_VALUE; 1781 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1782 min = Math.min(min, layout.getLineLeft(line)); 1783 max = Math.max(max, layout.getLineRight(line)); 1784 } 1785 left = (int) min; 1786 right = (int) (max + 0.5f); 1787 } 1788 1789 // Rebuild display list if it is invalid 1790 if (blockDisplayListIsInvalid) { 1791 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1792 right - left, bottom - top); 1793 try { 1794 // drawText is always relative to TextView's origin, this translation 1795 // brings this range of text back to the top left corner of the viewport 1796 displayListCanvas.translate(-left, -top); 1797 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1798 mTextRenderNodes[blockIndex].isDirty = false; 1799 // No need to untranslate, previous context is popped after 1800 // drawDisplayList 1801 } finally { 1802 blockDisplayList.end(displayListCanvas); 1803 // Same as drawDisplayList below, handled by our TextView's parent 1804 blockDisplayList.setClipToBounds(false); 1805 } 1806 } 1807 1808 // Valid display list only needs to update its drawing location. 1809 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1810 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1811 } 1812 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1813 return startIndexToFindAvailableRenderNode; 1814 } 1815 1816 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1817 int searchStartIndex) { 1818 int length = mTextRenderNodes.length; 1819 for (int i = searchStartIndex; i < length; i++) { 1820 boolean blockIndexFound = false; 1821 for (int j = 0; j < numberOfBlocks; j++) { 1822 if (blockIndices[j] == i) { 1823 blockIndexFound = true; 1824 break; 1825 } 1826 } 1827 if (blockIndexFound) continue; 1828 return i; 1829 } 1830 1831 // No available index found, the pool has to grow 1832 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1833 return length; 1834 } 1835 1836 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1837 final boolean translate = cursorOffsetVertical != 0; 1838 if (translate) canvas.translate(0, cursorOffsetVertical); 1839 for (int i = 0; i < mCursorCount; i++) { 1840 mCursorDrawable[i].draw(canvas); 1841 } 1842 if (translate) canvas.translate(0, -cursorOffsetVertical); 1843 } 1844 1845 void invalidateHandlesAndActionMode() { 1846 if (mSelectionModifierCursorController != null) { 1847 mSelectionModifierCursorController.invalidateHandles(); 1848 } 1849 if (mInsertionPointCursorController != null) { 1850 mInsertionPointCursorController.invalidateHandle(); 1851 } 1852 if (mTextActionMode != null) { 1853 invalidateActionModeAsync(); 1854 } 1855 } 1856 1857 /** 1858 * Invalidates all the sub-display lists that overlap the specified character range 1859 */ 1860 void invalidateTextDisplayList(Layout layout, int start, int end) { 1861 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1862 final int firstLine = layout.getLineForOffset(start); 1863 final int lastLine = layout.getLineForOffset(end); 1864 1865 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1866 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1867 int[] blockIndices = dynamicLayout.getBlockIndices(); 1868 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1869 1870 int i = 0; 1871 // Skip the blocks before firstLine 1872 while (i < numberOfBlocks) { 1873 if (blockEndLines[i] >= firstLine) break; 1874 i++; 1875 } 1876 1877 // Invalidate all subsequent blocks until lastLine is passed 1878 while (i < numberOfBlocks) { 1879 final int blockIndex = blockIndices[i]; 1880 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1881 mTextRenderNodes[blockIndex].isDirty = true; 1882 } 1883 if (blockEndLines[i] >= lastLine) break; 1884 i++; 1885 } 1886 } 1887 } 1888 1889 void invalidateTextDisplayList() { 1890 if (mTextRenderNodes != null) { 1891 for (int i = 0; i < mTextRenderNodes.length; i++) { 1892 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1893 } 1894 } 1895 } 1896 1897 void updateCursorsPositions() { 1898 if (mTextView.mCursorDrawableRes == 0) { 1899 mCursorCount = 0; 1900 return; 1901 } 1902 1903 Layout layout = mTextView.getLayout(); 1904 final int offset = mTextView.getSelectionStart(); 1905 final int line = layout.getLineForOffset(offset); 1906 final int top = layout.getLineTop(line); 1907 final int bottom = layout.getLineTop(line + 1); 1908 1909 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1910 1911 int middle = bottom; 1912 if (mCursorCount == 2) { 1913 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1914 middle = (top + bottom) >> 1; 1915 } 1916 1917 boolean clamped = layout.shouldClampCursor(line); 1918 updateCursorPosition(0, top, middle, layout.getPrimaryHorizontal(offset, clamped)); 1919 1920 if (mCursorCount == 2) { 1921 updateCursorPosition(1, middle, bottom, layout.getSecondaryHorizontal(offset, clamped)); 1922 } 1923 } 1924 1925 void refreshTextActionMode() { 1926 if (extractedTextModeWillBeStarted()) { 1927 mRestartActionModeOnNextRefresh = false; 1928 return; 1929 } 1930 final boolean hasSelection = mTextView.hasSelection(); 1931 final SelectionModifierCursorController selectionController = getSelectionController(); 1932 final InsertionPointCursorController insertionController = getInsertionController(); 1933 if ((selectionController != null && selectionController.isCursorBeingModified()) 1934 || (insertionController != null && insertionController.isCursorBeingModified())) { 1935 // ActionMode should be managed by the currently active cursor controller. 1936 mRestartActionModeOnNextRefresh = false; 1937 return; 1938 } 1939 if (hasSelection) { 1940 hideInsertionPointCursorController(); 1941 if (mTextActionMode == null) { 1942 if (mRestartActionModeOnNextRefresh) { 1943 // To avoid distraction, newly start action mode only when selection action 1944 // mode is being restarted. 1945 startSelectionActionMode(); 1946 } 1947 } else if (selectionController == null || !selectionController.isActive()) { 1948 // Insertion action mode is active. Avoid dismissing the selection. 1949 stopTextActionModeWithPreservingSelection(); 1950 startSelectionActionMode(); 1951 } else { 1952 mTextActionMode.invalidateContentRect(); 1953 } 1954 } else { 1955 // Insertion action mode is started only when insertion controller is explicitly 1956 // activated. 1957 if (insertionController == null || !insertionController.isActive()) { 1958 stopTextActionMode(); 1959 } else if (mTextActionMode != null) { 1960 mTextActionMode.invalidateContentRect(); 1961 } 1962 } 1963 mRestartActionModeOnNextRefresh = false; 1964 } 1965 1966 /** 1967 * Start an Insertion action mode. 1968 */ 1969 void startInsertionActionMode() { 1970 if (mInsertionActionModeRunnable != null) { 1971 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1972 } 1973 if (extractedTextModeWillBeStarted()) { 1974 return; 1975 } 1976 stopTextActionMode(); 1977 1978 ActionMode.Callback actionModeCallback = 1979 new TextActionModeCallback(false /* hasSelection */); 1980 mTextActionMode = mTextView.startActionMode( 1981 actionModeCallback, ActionMode.TYPE_FLOATING); 1982 if (mTextActionMode != null && getInsertionController() != null) { 1983 getInsertionController().show(); 1984 } 1985 } 1986 1987 @NonNull 1988 TextView getTextView() { 1989 return mTextView; 1990 } 1991 1992 @Nullable 1993 ActionMode getTextActionMode() { 1994 return mTextActionMode; 1995 } 1996 1997 void setRestartActionModeOnNextRefresh(boolean value) { 1998 mRestartActionModeOnNextRefresh = value; 1999 } 2000 2001 /** 2002 * Asynchronously starts a selection action mode using the TextClassifier. 2003 */ 2004 void startSelectionActionModeAsync() { 2005 getSelectionActionModeHelper().startActionModeAsync(); 2006 } 2007 2008 /** 2009 * Synchronously starts a selection action mode without the TextClassifier. 2010 */ 2011 void startSelectionActionMode() { 2012 getSelectionActionModeHelper().startActionMode(); 2013 } 2014 2015 /** 2016 * Asynchronously invalidates an action mode using the TextClassifier. 2017 */ 2018 private void invalidateActionModeAsync() { 2019 getSelectionActionModeHelper().invalidateActionModeAsync(); 2020 } 2021 2022 private SelectionActionModeHelper getSelectionActionModeHelper() { 2023 if (mSelectionActionModeHelper == null) { 2024 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2025 } 2026 return mSelectionActionModeHelper; 2027 } 2028 2029 /** 2030 * If the TextView allows text selection, selects the current word when no existing selection 2031 * was available and starts a drag. 2032 * 2033 * @return true if the drag was started. 2034 */ 2035 private boolean selectCurrentWordAndStartDrag() { 2036 if (mInsertionActionModeRunnable != null) { 2037 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2038 } 2039 if (extractedTextModeWillBeStarted()) { 2040 return false; 2041 } 2042 if (!checkField()) { 2043 return false; 2044 } 2045 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2046 // No selection and cannot select a word. 2047 return false; 2048 } 2049 stopTextActionModeWithPreservingSelection(); 2050 getSelectionController().enterDrag( 2051 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2052 return true; 2053 } 2054 2055 /** 2056 * Checks whether a selection can be performed on the current TextView. 2057 * 2058 * @return true if a selection can be performed 2059 */ 2060 boolean checkField() { 2061 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2062 Log.w(TextView.LOG_TAG, 2063 "TextView does not support text selection. Selection cancelled."); 2064 return false; 2065 } 2066 return true; 2067 } 2068 2069 boolean startSelectionActionModeInternal() { 2070 if (extractedTextModeWillBeStarted()) { 2071 return false; 2072 } 2073 if (mTextActionMode != null) { 2074 // Text action mode is already started 2075 invalidateActionModeAsync(); 2076 return false; 2077 } 2078 2079 if (!checkField() || !mTextView.hasSelection()) { 2080 return false; 2081 } 2082 2083 ActionMode.Callback actionModeCallback = 2084 new TextActionModeCallback(true /* hasSelection */); 2085 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2086 2087 final boolean selectionStarted = mTextActionMode != null; 2088 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2089 // Show the IME to be able to replace text, except when selecting non editable text. 2090 final InputMethodManager imm = InputMethodManager.peekInstance(); 2091 if (imm != null) { 2092 imm.showSoftInput(mTextView, 0, null); 2093 } 2094 } 2095 return selectionStarted; 2096 } 2097 2098 private boolean extractedTextModeWillBeStarted() { 2099 if (!(mTextView.isInExtractedMode())) { 2100 final InputMethodManager imm = InputMethodManager.peekInstance(); 2101 return imm != null && imm.isFullscreenMode(); 2102 } 2103 return false; 2104 } 2105 2106 /** 2107 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2108 * the current cursor position or selection range. This method is consistent with the 2109 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2110 */ 2111 private boolean shouldOfferToShowSuggestions() { 2112 CharSequence text = mTextView.getText(); 2113 if (!(text instanceof Spannable)) return false; 2114 2115 final Spannable spannable = (Spannable) text; 2116 final int selectionStart = mTextView.getSelectionStart(); 2117 final int selectionEnd = mTextView.getSelectionEnd(); 2118 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2119 SuggestionSpan.class); 2120 if (suggestionSpans.length == 0) { 2121 return false; 2122 } 2123 if (selectionStart == selectionEnd) { 2124 // Spans overlap the cursor. 2125 for (int i = 0; i < suggestionSpans.length; i++) { 2126 if (suggestionSpans[i].getSuggestions().length > 0) { 2127 return true; 2128 } 2129 } 2130 return false; 2131 } 2132 int minSpanStart = mTextView.getText().length(); 2133 int maxSpanEnd = 0; 2134 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2135 int unionOfSpansCoveringSelectionStartEnd = 0; 2136 boolean hasValidSuggestions = false; 2137 for (int i = 0; i < suggestionSpans.length; i++) { 2138 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2139 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2140 minSpanStart = Math.min(minSpanStart, spanStart); 2141 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2142 if (selectionStart < spanStart || selectionStart > spanEnd) { 2143 // The span doesn't cover the current selection start point. 2144 continue; 2145 } 2146 hasValidSuggestions = 2147 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2148 unionOfSpansCoveringSelectionStartStart = 2149 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2150 unionOfSpansCoveringSelectionStartEnd = 2151 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2152 } 2153 if (!hasValidSuggestions) { 2154 return false; 2155 } 2156 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2157 // No spans cover the selection start point. 2158 return false; 2159 } 2160 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2161 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2162 // There is a span that is not covered by the union. In this case, we soouldn't offer 2163 // to show suggestions as it's confusing. 2164 return false; 2165 } 2166 return true; 2167 } 2168 2169 /** 2170 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2171 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2172 */ 2173 private boolean isCursorInsideEasyCorrectionSpan() { 2174 Spannable spannable = (Spannable) mTextView.getText(); 2175 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2176 mTextView.getSelectionEnd(), SuggestionSpan.class); 2177 for (int i = 0; i < suggestionSpans.length; i++) { 2178 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2179 return true; 2180 } 2181 } 2182 return false; 2183 } 2184 2185 void onTouchUpEvent(MotionEvent event) { 2186 if (getSelectionActionModeHelper().resetOriginalSelection( 2187 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2188 return; 2189 } 2190 2191 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2192 hideCursorAndSpanControllers(); 2193 stopTextActionMode(); 2194 CharSequence text = mTextView.getText(); 2195 if (!selectAllGotFocus && text.length() > 0) { 2196 // Move cursor 2197 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2198 Selection.setSelection((Spannable) text, offset); 2199 if (mSpellChecker != null) { 2200 // When the cursor moves, the word that was typed may need spell check 2201 mSpellChecker.onSelectionChanged(); 2202 } 2203 2204 if (!extractedTextModeWillBeStarted()) { 2205 if (isCursorInsideEasyCorrectionSpan()) { 2206 // Cancel the single tap delayed runnable. 2207 if (mInsertionActionModeRunnable != null) { 2208 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2209 } 2210 2211 mShowSuggestionRunnable = new Runnable() { 2212 public void run() { 2213 replace(); 2214 } 2215 }; 2216 // removeCallbacks is performed on every touch 2217 mTextView.postDelayed(mShowSuggestionRunnable, 2218 ViewConfiguration.getDoubleTapTimeout()); 2219 } else if (hasInsertionController()) { 2220 getInsertionController().show(); 2221 } 2222 } 2223 } 2224 } 2225 2226 protected void stopTextActionMode() { 2227 if (mTextActionMode != null) { 2228 // This will hide the mSelectionModifierCursorController 2229 mTextActionMode.finish(); 2230 } 2231 } 2232 2233 private void stopTextActionModeWithPreservingSelection() { 2234 if (mTextActionMode != null) { 2235 mRestartActionModeOnNextRefresh = true; 2236 } 2237 mPreserveSelection = true; 2238 stopTextActionMode(); 2239 mPreserveSelection = false; 2240 } 2241 2242 /** 2243 * @return True if this view supports insertion handles. 2244 */ 2245 boolean hasInsertionController() { 2246 return mInsertionControllerEnabled; 2247 } 2248 2249 /** 2250 * @return True if this view supports selection handles. 2251 */ 2252 boolean hasSelectionController() { 2253 return mSelectionControllerEnabled; 2254 } 2255 2256 private InsertionPointCursorController getInsertionController() { 2257 if (!mInsertionControllerEnabled) { 2258 return null; 2259 } 2260 2261 if (mInsertionPointCursorController == null) { 2262 mInsertionPointCursorController = new InsertionPointCursorController(); 2263 2264 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2265 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2266 } 2267 2268 return mInsertionPointCursorController; 2269 } 2270 2271 @Nullable 2272 SelectionModifierCursorController getSelectionController() { 2273 if (!mSelectionControllerEnabled) { 2274 return null; 2275 } 2276 2277 if (mSelectionModifierCursorController == null) { 2278 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2279 2280 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2281 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2282 } 2283 2284 return mSelectionModifierCursorController; 2285 } 2286 2287 @VisibleForTesting 2288 public Drawable[] getCursorDrawable() { 2289 return mCursorDrawable; 2290 } 2291 2292 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2293 if (mCursorDrawable[cursorIndex] == null) { 2294 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2295 mTextView.mCursorDrawableRes); 2296 } 2297 final Drawable drawable = mCursorDrawable[cursorIndex]; 2298 final int left = clampHorizontalPosition(drawable, horizontal); 2299 final int width = drawable.getIntrinsicWidth(); 2300 drawable.setBounds(left, top - mTempRect.top, left + width, 2301 bottom + mTempRect.bottom); 2302 } 2303 2304 /** 2305 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2306 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2307 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2308 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2309 * of the view. 2310 * 2311 * @param drawable Drawable. Can be null. 2312 * @param horizontal Horizontal position for the drawable. 2313 * @return The clamped horizontal position for the drawable. 2314 */ 2315 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2316 horizontal = Math.max(0.5f, horizontal - 0.5f); 2317 if (mTempRect == null) mTempRect = new Rect(); 2318 2319 int drawableWidth = 0; 2320 if (drawable != null) { 2321 drawable.getPadding(mTempRect); 2322 drawableWidth = drawable.getIntrinsicWidth(); 2323 } else { 2324 mTempRect.setEmpty(); 2325 } 2326 2327 int scrollX = mTextView.getScrollX(); 2328 float horizontalDiff = horizontal - scrollX; 2329 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2330 - mTextView.getCompoundPaddingRight(); 2331 2332 final int left; 2333 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2334 // at the rightmost position 2335 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2336 } else if (Math.abs(horizontalDiff) <= 1f 2337 || (TextUtils.isEmpty(mTextView.getText()) 2338 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2339 && horizontal <= 1f)) { 2340 // at the leftmost position 2341 left = scrollX - mTempRect.left; 2342 } else { 2343 left = (int) horizontal - mTempRect.left; 2344 } 2345 return left; 2346 } 2347 2348 /** 2349 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2350 * a dictionary) from the current input method, provided by it calling 2351 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2352 * implementation flashes the background of the corrected word to provide feedback to the user. 2353 * 2354 * @param info The auto correct info about the text that was corrected. 2355 */ 2356 public void onCommitCorrection(CorrectionInfo info) { 2357 if (mCorrectionHighlighter == null) { 2358 mCorrectionHighlighter = new CorrectionHighlighter(); 2359 } else { 2360 mCorrectionHighlighter.invalidate(false); 2361 } 2362 2363 mCorrectionHighlighter.highlight(info); 2364 mUndoInputFilter.freezeLastEdit(); 2365 } 2366 2367 void onScrollChanged() { 2368 if (mPositionListener != null) { 2369 mPositionListener.onScrollChanged(); 2370 } 2371 if (mTextActionMode != null) { 2372 mTextActionMode.invalidateContentRect(); 2373 } 2374 } 2375 2376 /** 2377 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2378 */ 2379 private boolean shouldBlink() { 2380 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2381 2382 final int start = mTextView.getSelectionStart(); 2383 if (start < 0) return false; 2384 2385 final int end = mTextView.getSelectionEnd(); 2386 if (end < 0) return false; 2387 2388 return start == end; 2389 } 2390 2391 void makeBlink() { 2392 if (shouldBlink()) { 2393 mShowCursor = SystemClock.uptimeMillis(); 2394 if (mBlink == null) mBlink = new Blink(); 2395 mTextView.removeCallbacks(mBlink); 2396 mTextView.postDelayed(mBlink, BLINK); 2397 } else { 2398 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2399 } 2400 } 2401 2402 private class Blink implements Runnable { 2403 private boolean mCancelled; 2404 2405 public void run() { 2406 if (mCancelled) { 2407 return; 2408 } 2409 2410 mTextView.removeCallbacks(this); 2411 2412 if (shouldBlink()) { 2413 if (mTextView.getLayout() != null) { 2414 mTextView.invalidateCursorPath(); 2415 } 2416 2417 mTextView.postDelayed(this, BLINK); 2418 } 2419 } 2420 2421 void cancel() { 2422 if (!mCancelled) { 2423 mTextView.removeCallbacks(this); 2424 mCancelled = true; 2425 } 2426 } 2427 2428 void uncancel() { 2429 mCancelled = false; 2430 } 2431 } 2432 2433 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2434 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2435 com.android.internal.R.layout.text_drag_thumbnail, null); 2436 2437 if (shadowView == null) { 2438 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2439 } 2440 2441 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2442 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2443 end = TextUtils.unpackRangeEndFromLong(range); 2444 } 2445 final CharSequence text = mTextView.getTransformedText(start, end); 2446 shadowView.setText(text); 2447 shadowView.setTextColor(mTextView.getTextColors()); 2448 2449 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2450 shadowView.setGravity(Gravity.CENTER); 2451 2452 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2453 ViewGroup.LayoutParams.WRAP_CONTENT)); 2454 2455 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2456 shadowView.measure(size, size); 2457 2458 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2459 shadowView.invalidate(); 2460 return new DragShadowBuilder(shadowView); 2461 } 2462 2463 private static class DragLocalState { 2464 public TextView sourceTextView; 2465 public int start, end; 2466 2467 public DragLocalState(TextView sourceTextView, int start, int end) { 2468 this.sourceTextView = sourceTextView; 2469 this.start = start; 2470 this.end = end; 2471 } 2472 } 2473 2474 void onDrop(DragEvent event) { 2475 SpannableStringBuilder content = new SpannableStringBuilder(); 2476 2477 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2478 if (permissions != null) { 2479 permissions.takeTransient(); 2480 } 2481 2482 try { 2483 ClipData clipData = event.getClipData(); 2484 final int itemCount = clipData.getItemCount(); 2485 for (int i = 0; i < itemCount; i++) { 2486 Item item = clipData.getItemAt(i); 2487 content.append(item.coerceToStyledText(mTextView.getContext())); 2488 } 2489 } finally { 2490 if (permissions != null) { 2491 permissions.release(); 2492 } 2493 } 2494 2495 mTextView.beginBatchEdit(); 2496 mUndoInputFilter.freezeLastEdit(); 2497 try { 2498 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2499 Object localState = event.getLocalState(); 2500 DragLocalState dragLocalState = null; 2501 if (localState instanceof DragLocalState) { 2502 dragLocalState = (DragLocalState) localState; 2503 } 2504 boolean dragDropIntoItself = dragLocalState != null 2505 && dragLocalState.sourceTextView == mTextView; 2506 2507 if (dragDropIntoItself) { 2508 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2509 // A drop inside the original selection discards the drop. 2510 return; 2511 } 2512 } 2513 2514 final int originalLength = mTextView.getText().length(); 2515 int min = offset; 2516 int max = offset; 2517 2518 Selection.setSelection((Spannable) mTextView.getText(), max); 2519 mTextView.replaceText_internal(min, max, content); 2520 2521 if (dragDropIntoItself) { 2522 int dragSourceStart = dragLocalState.start; 2523 int dragSourceEnd = dragLocalState.end; 2524 if (max <= dragSourceStart) { 2525 // Inserting text before selection has shifted positions 2526 final int shift = mTextView.getText().length() - originalLength; 2527 dragSourceStart += shift; 2528 dragSourceEnd += shift; 2529 } 2530 2531 // Delete original selection 2532 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2533 2534 // Make sure we do not leave two adjacent spaces. 2535 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2536 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2537 if (nextCharIdx > prevCharIdx + 1) { 2538 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2539 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2540 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2541 } 2542 } 2543 } 2544 } finally { 2545 mTextView.endBatchEdit(); 2546 mUndoInputFilter.freezeLastEdit(); 2547 } 2548 } 2549 2550 public void addSpanWatchers(Spannable text) { 2551 final int textLength = text.length(); 2552 2553 if (mKeyListener != null) { 2554 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2555 } 2556 2557 if (mSpanController == null) { 2558 mSpanController = new SpanController(); 2559 } 2560 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2561 } 2562 2563 void setContextMenuAnchor(float x, float y) { 2564 mContextMenuAnchorX = x; 2565 mContextMenuAnchorY = y; 2566 } 2567 2568 void onCreateContextMenu(ContextMenu menu) { 2569 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2570 || Float.isNaN(mContextMenuAnchorY)) { 2571 return; 2572 } 2573 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2574 if (offset == -1) { 2575 return; 2576 } 2577 stopTextActionModeWithPreservingSelection(); 2578 final boolean isOnSelection = mTextView.hasSelection() 2579 && offset >= mTextView.getSelectionStart() && offset <= mTextView.getSelectionEnd(); 2580 if (!isOnSelection) { 2581 // Right clicked position is not on the selection. Remove the selection and move the 2582 // cursor to the right clicked position. 2583 Selection.setSelection((Spannable) mTextView.getText(), offset); 2584 stopTextActionMode(); 2585 } 2586 2587 if (shouldOfferToShowSuggestions()) { 2588 final SuggestionInfo[] suggestionInfoArray = 2589 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2590 for (int i = 0; i < suggestionInfoArray.length; i++) { 2591 suggestionInfoArray[i] = new SuggestionInfo(); 2592 } 2593 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2594 com.android.internal.R.string.replace); 2595 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2596 for (int i = 0; i < numItems; i++) { 2597 final SuggestionInfo info = suggestionInfoArray[i]; 2598 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2599 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2600 @Override 2601 public boolean onMenuItemClick(MenuItem item) { 2602 replaceWithSuggestion(info); 2603 return true; 2604 } 2605 }); 2606 } 2607 } 2608 2609 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2610 com.android.internal.R.string.undo) 2611 .setAlphabeticShortcut('z') 2612 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2613 .setEnabled(mTextView.canUndo()); 2614 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2615 com.android.internal.R.string.redo) 2616 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2617 .setEnabled(mTextView.canRedo()); 2618 2619 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2620 com.android.internal.R.string.cut) 2621 .setAlphabeticShortcut('x') 2622 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2623 .setEnabled(mTextView.canCut()); 2624 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2625 com.android.internal.R.string.copy) 2626 .setAlphabeticShortcut('c') 2627 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2628 .setEnabled(mTextView.canCopy()); 2629 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2630 com.android.internal.R.string.paste) 2631 .setAlphabeticShortcut('v') 2632 .setEnabled(mTextView.canPaste()) 2633 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2634 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2635 com.android.internal.R.string.paste_as_plain_text) 2636 .setEnabled(mTextView.canPaste()) 2637 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2638 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2639 com.android.internal.R.string.share) 2640 .setEnabled(mTextView.canShare()) 2641 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2642 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2643 com.android.internal.R.string.selectAll) 2644 .setAlphabeticShortcut('a') 2645 .setEnabled(mTextView.canSelectAllText()) 2646 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2647 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2648 com.android.internal.R.string.autofill) 2649 .setEnabled(mTextView.canRequestAutofill()) 2650 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2651 2652 mPreserveSelection = true; 2653 } 2654 2655 @Nullable 2656 private SuggestionSpan findEquivalentSuggestionSpan( 2657 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2658 final Editable editable = (Editable) mTextView.getText(); 2659 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2660 // Exactly same span is found. 2661 return suggestionSpanInfo.mSuggestionSpan; 2662 } 2663 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2664 // contents. 2665 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2666 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2667 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2668 final int start = editable.getSpanStart(suggestionSpan); 2669 if (start != suggestionSpanInfo.mSpanStart) { 2670 continue; 2671 } 2672 final int end = editable.getSpanEnd(suggestionSpan); 2673 if (end != suggestionSpanInfo.mSpanEnd) { 2674 continue; 2675 } 2676 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2677 return suggestionSpan; 2678 } 2679 } 2680 return null; 2681 } 2682 2683 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2684 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2685 suggestionInfo.mSuggestionSpanInfo); 2686 if (targetSuggestionSpan == null) { 2687 // Span has been removed 2688 return; 2689 } 2690 final Editable editable = (Editable) mTextView.getText(); 2691 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2692 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2693 if (spanStart < 0 || spanEnd <= spanStart) { 2694 // Span has been removed 2695 return; 2696 } 2697 2698 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2699 // SuggestionSpans are removed by replace: save them before 2700 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2701 SuggestionSpan.class); 2702 final int length = suggestionSpans.length; 2703 int[] suggestionSpansStarts = new int[length]; 2704 int[] suggestionSpansEnds = new int[length]; 2705 int[] suggestionSpansFlags = new int[length]; 2706 for (int i = 0; i < length; i++) { 2707 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2708 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2709 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2710 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2711 2712 // Remove potential misspelled flags 2713 int suggestionSpanFlags = suggestionSpan.getFlags(); 2714 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2715 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2716 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2717 suggestionSpan.setFlags(suggestionSpanFlags); 2718 } 2719 } 2720 2721 // Notify source IME of the suggestion pick. Do this before swapping texts. 2722 targetSuggestionSpan.notifySelection( 2723 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2724 2725 // Swap text content between actual text and Suggestion span 2726 final int suggestionStart = suggestionInfo.mSuggestionStart; 2727 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2728 final String suggestion = suggestionInfo.mText.subSequence( 2729 suggestionStart, suggestionEnd).toString(); 2730 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2731 2732 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2733 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2734 2735 // Restore previous SuggestionSpans 2736 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2737 for (int i = 0; i < length; i++) { 2738 // Only spans that include the modified region make sense after replacement 2739 // Spans partially included in the replaced region are removed, there is no 2740 // way to assign them a valid range after replacement 2741 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2742 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2743 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2744 } 2745 } 2746 // Move cursor at the end of the replaced word 2747 final int newCursorPosition = spanEnd + lengthDelta; 2748 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2749 } 2750 2751 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2752 new MenuItem.OnMenuItemClickListener() { 2753 @Override 2754 public boolean onMenuItemClick(MenuItem item) { 2755 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2756 return true; 2757 } 2758 return mTextView.onTextContextMenuItem(item.getItemId()); 2759 } 2760 }; 2761 2762 /** 2763 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2764 * pop-up should be displayed. 2765 * Also monitors {@link Selection} to call back to the attached input method. 2766 */ 2767 private class SpanController implements SpanWatcher { 2768 2769 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2770 2771 private EasyEditPopupWindow mPopupWindow; 2772 2773 private Runnable mHidePopup; 2774 2775 // This function is pure but inner classes can't have static functions 2776 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2777 final Object span) { 2778 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2779 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2780 } 2781 2782 @Override 2783 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2784 if (isNonIntermediateSelectionSpan(text, span)) { 2785 sendUpdateSelection(); 2786 } else if (span instanceof EasyEditSpan) { 2787 if (mPopupWindow == null) { 2788 mPopupWindow = new EasyEditPopupWindow(); 2789 mHidePopup = new Runnable() { 2790 @Override 2791 public void run() { 2792 hide(); 2793 } 2794 }; 2795 } 2796 2797 // Make sure there is only at most one EasyEditSpan in the text 2798 if (mPopupWindow.mEasyEditSpan != null) { 2799 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2800 } 2801 2802 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2803 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2804 @Override 2805 public void onDeleteClick(EasyEditSpan span) { 2806 Editable editable = (Editable) mTextView.getText(); 2807 int start = editable.getSpanStart(span); 2808 int end = editable.getSpanEnd(span); 2809 if (start >= 0 && end >= 0) { 2810 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2811 mTextView.deleteText_internal(start, end); 2812 } 2813 editable.removeSpan(span); 2814 } 2815 }); 2816 2817 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2818 // The window is not visible yet, ignore the text change. 2819 return; 2820 } 2821 2822 if (mTextView.getLayout() == null) { 2823 // The view has not been laid out yet, ignore the text change 2824 return; 2825 } 2826 2827 if (extractedTextModeWillBeStarted()) { 2828 // The input is in extract mode. Do not handle the easy edit in 2829 // the original TextView, as the ExtractEditText will do 2830 return; 2831 } 2832 2833 mPopupWindow.show(); 2834 mTextView.removeCallbacks(mHidePopup); 2835 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2836 } 2837 } 2838 2839 @Override 2840 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2841 if (isNonIntermediateSelectionSpan(text, span)) { 2842 sendUpdateSelection(); 2843 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2844 hide(); 2845 } 2846 } 2847 2848 @Override 2849 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2850 int newStart, int newEnd) { 2851 if (isNonIntermediateSelectionSpan(text, span)) { 2852 sendUpdateSelection(); 2853 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2854 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2855 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2856 text.removeSpan(easyEditSpan); 2857 } 2858 } 2859 2860 public void hide() { 2861 if (mPopupWindow != null) { 2862 mPopupWindow.hide(); 2863 mTextView.removeCallbacks(mHidePopup); 2864 } 2865 } 2866 2867 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2868 try { 2869 PendingIntent pendingIntent = span.getPendingIntent(); 2870 if (pendingIntent != null) { 2871 Intent intent = new Intent(); 2872 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2873 pendingIntent.send(mTextView.getContext(), 0, intent); 2874 } 2875 } catch (CanceledException e) { 2876 // This should not happen, as we should try to send the intent only once. 2877 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2878 } 2879 } 2880 } 2881 2882 /** 2883 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2884 */ 2885 private interface EasyEditDeleteListener { 2886 2887 /** 2888 * Clicks the delete pop-up. 2889 */ 2890 void onDeleteClick(EasyEditSpan span); 2891 } 2892 2893 /** 2894 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2895 * by {@link SpanController}. 2896 */ 2897 private class EasyEditPopupWindow extends PinnedPopupWindow 2898 implements OnClickListener { 2899 private static final int POPUP_TEXT_LAYOUT = 2900 com.android.internal.R.layout.text_edit_action_popup_text; 2901 private TextView mDeleteTextView; 2902 private EasyEditSpan mEasyEditSpan; 2903 private EasyEditDeleteListener mOnDeleteListener; 2904 2905 @Override 2906 protected void createPopupWindow() { 2907 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2908 com.android.internal.R.attr.textSelectHandleWindowStyle); 2909 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2910 mPopupWindow.setClippingEnabled(true); 2911 } 2912 2913 @Override 2914 protected void initContentView() { 2915 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2916 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2917 mContentView = linearLayout; 2918 mContentView.setBackgroundResource( 2919 com.android.internal.R.drawable.text_edit_side_paste_window); 2920 2921 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 2922 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2923 2924 LayoutParams wrapContent = new LayoutParams( 2925 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2926 2927 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2928 mDeleteTextView.setLayoutParams(wrapContent); 2929 mDeleteTextView.setText(com.android.internal.R.string.delete); 2930 mDeleteTextView.setOnClickListener(this); 2931 mContentView.addView(mDeleteTextView); 2932 } 2933 2934 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2935 mEasyEditSpan = easyEditSpan; 2936 } 2937 2938 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2939 mOnDeleteListener = listener; 2940 } 2941 2942 @Override 2943 public void onClick(View view) { 2944 if (view == mDeleteTextView 2945 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2946 && mOnDeleteListener != null) { 2947 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2948 } 2949 } 2950 2951 @Override 2952 public void hide() { 2953 if (mEasyEditSpan != null) { 2954 mEasyEditSpan.setDeleteEnabled(false); 2955 } 2956 mOnDeleteListener = null; 2957 super.hide(); 2958 } 2959 2960 @Override 2961 protected int getTextOffset() { 2962 // Place the pop-up at the end of the span 2963 Editable editable = (Editable) mTextView.getText(); 2964 return editable.getSpanEnd(mEasyEditSpan); 2965 } 2966 2967 @Override 2968 protected int getVerticalLocalPosition(int line) { 2969 return mTextView.getLayout().getLineBottom(line); 2970 } 2971 2972 @Override 2973 protected int clipVertically(int positionY) { 2974 // As we display the pop-up below the span, no vertical clipping is required. 2975 return positionY; 2976 } 2977 } 2978 2979 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2980 // 3 handles 2981 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2982 // 1 CursorAnchorInfoNotifier 2983 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2984 private TextViewPositionListener[] mPositionListeners = 2985 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2986 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2987 private boolean mPositionHasChanged = true; 2988 // Absolute position of the TextView with respect to its parent window 2989 private int mPositionX, mPositionY; 2990 private int mPositionXOnScreen, mPositionYOnScreen; 2991 private int mNumberOfListeners; 2992 private boolean mScrollHasChanged; 2993 final int[] mTempCoords = new int[2]; 2994 2995 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2996 if (mNumberOfListeners == 0) { 2997 updatePosition(); 2998 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2999 vto.addOnPreDrawListener(this); 3000 } 3001 3002 int emptySlotIndex = -1; 3003 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3004 TextViewPositionListener listener = mPositionListeners[i]; 3005 if (listener == positionListener) { 3006 return; 3007 } else if (emptySlotIndex < 0 && listener == null) { 3008 emptySlotIndex = i; 3009 } 3010 } 3011 3012 mPositionListeners[emptySlotIndex] = positionListener; 3013 mCanMove[emptySlotIndex] = canMove; 3014 mNumberOfListeners++; 3015 } 3016 3017 public void removeSubscriber(TextViewPositionListener positionListener) { 3018 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3019 if (mPositionListeners[i] == positionListener) { 3020 mPositionListeners[i] = null; 3021 mNumberOfListeners--; 3022 break; 3023 } 3024 } 3025 3026 if (mNumberOfListeners == 0) { 3027 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3028 vto.removeOnPreDrawListener(this); 3029 } 3030 } 3031 3032 public int getPositionX() { 3033 return mPositionX; 3034 } 3035 3036 public int getPositionY() { 3037 return mPositionY; 3038 } 3039 3040 public int getPositionXOnScreen() { 3041 return mPositionXOnScreen; 3042 } 3043 3044 public int getPositionYOnScreen() { 3045 return mPositionYOnScreen; 3046 } 3047 3048 @Override 3049 public boolean onPreDraw() { 3050 updatePosition(); 3051 3052 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3053 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3054 TextViewPositionListener positionListener = mPositionListeners[i]; 3055 if (positionListener != null) { 3056 positionListener.updatePosition(mPositionX, mPositionY, 3057 mPositionHasChanged, mScrollHasChanged); 3058 } 3059 } 3060 } 3061 3062 mScrollHasChanged = false; 3063 return true; 3064 } 3065 3066 private void updatePosition() { 3067 mTextView.getLocationInWindow(mTempCoords); 3068 3069 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3070 3071 mPositionX = mTempCoords[0]; 3072 mPositionY = mTempCoords[1]; 3073 3074 mTextView.getLocationOnScreen(mTempCoords); 3075 3076 mPositionXOnScreen = mTempCoords[0]; 3077 mPositionYOnScreen = mTempCoords[1]; 3078 } 3079 3080 public void onScrollChanged() { 3081 mScrollHasChanged = true; 3082 } 3083 } 3084 3085 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3086 protected PopupWindow mPopupWindow; 3087 protected ViewGroup mContentView; 3088 int mPositionX, mPositionY; 3089 int mClippingLimitLeft, mClippingLimitRight; 3090 3091 protected abstract void createPopupWindow(); 3092 protected abstract void initContentView(); 3093 protected abstract int getTextOffset(); 3094 protected abstract int getVerticalLocalPosition(int line); 3095 protected abstract int clipVertically(int positionY); 3096 protected void setUp() { 3097 } 3098 3099 public PinnedPopupWindow() { 3100 // Due to calling subclass methods in base constructor, subclass constructor is not 3101 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3102 // a chance to initialize subclasses, call setUp() method here. 3103 // TODO: It is good to extract non trivial initialization code from constructor. 3104 setUp(); 3105 3106 createPopupWindow(); 3107 3108 mPopupWindow.setWindowLayoutType( 3109 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3110 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3111 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3112 3113 initContentView(); 3114 3115 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3116 ViewGroup.LayoutParams.WRAP_CONTENT); 3117 mContentView.setLayoutParams(wrapContent); 3118 3119 mPopupWindow.setContentView(mContentView); 3120 } 3121 3122 public void show() { 3123 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3124 3125 computeLocalPosition(); 3126 3127 final PositionListener positionListener = getPositionListener(); 3128 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3129 } 3130 3131 protected void measureContent() { 3132 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3133 mContentView.measure( 3134 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3135 View.MeasureSpec.AT_MOST), 3136 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3137 View.MeasureSpec.AT_MOST)); 3138 } 3139 3140 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3141 * positioned according to viewportToContentHorizontalOffset. 3142 * 3143 * This method assumes that mContentView has properly been measured from its content. */ 3144 private void computeLocalPosition() { 3145 measureContent(); 3146 final int width = mContentView.getMeasuredWidth(); 3147 final int offset = getTextOffset(); 3148 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3149 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3150 3151 final int line = mTextView.getLayout().getLineForOffset(offset); 3152 mPositionY = getVerticalLocalPosition(line); 3153 mPositionY += mTextView.viewportToContentVerticalOffset(); 3154 } 3155 3156 private void updatePosition(int parentPositionX, int parentPositionY) { 3157 int positionX = parentPositionX + mPositionX; 3158 int positionY = parentPositionY + mPositionY; 3159 3160 positionY = clipVertically(positionY); 3161 3162 // Horizontal clipping 3163 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3164 final int width = mContentView.getMeasuredWidth(); 3165 positionX = Math.min( 3166 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3167 positionX = Math.max(-mClippingLimitLeft, positionX); 3168 3169 if (isShowing()) { 3170 mPopupWindow.update(positionX, positionY, -1, -1); 3171 } else { 3172 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3173 positionX, positionY); 3174 } 3175 } 3176 3177 public void hide() { 3178 if (!isShowing()) { 3179 return; 3180 } 3181 mPopupWindow.dismiss(); 3182 getPositionListener().removeSubscriber(this); 3183 } 3184 3185 @Override 3186 public void updatePosition(int parentPositionX, int parentPositionY, 3187 boolean parentPositionChanged, boolean parentScrolled) { 3188 // Either parentPositionChanged or parentScrolled is true, check if still visible 3189 if (isShowing() && isOffsetVisible(getTextOffset())) { 3190 if (parentScrolled) computeLocalPosition(); 3191 updatePosition(parentPositionX, parentPositionY); 3192 } else { 3193 hide(); 3194 } 3195 } 3196 3197 public boolean isShowing() { 3198 return mPopupWindow.isShowing(); 3199 } 3200 } 3201 3202 private static final class SuggestionInfo { 3203 // Range of actual suggestion within mText 3204 int mSuggestionStart, mSuggestionEnd; 3205 3206 // The SuggestionSpan that this TextView represents 3207 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3208 3209 // The index of this suggestion inside suggestionSpan 3210 int mSuggestionIndex; 3211 3212 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3213 3214 void clear() { 3215 mSuggestionSpanInfo.clear(); 3216 mText.clear(); 3217 } 3218 3219 // Utility method to set attributes about a SuggestionSpan. 3220 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3221 mSuggestionSpanInfo.mSuggestionSpan = span; 3222 mSuggestionSpanInfo.mSpanStart = spanStart; 3223 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3224 } 3225 } 3226 3227 private static final class SuggestionSpanInfo { 3228 // The SuggestionSpan; 3229 @Nullable 3230 SuggestionSpan mSuggestionSpan; 3231 3232 // The SuggestionSpan start position 3233 int mSpanStart; 3234 3235 // The SuggestionSpan end position 3236 int mSpanEnd; 3237 3238 void clear() { 3239 mSuggestionSpan = null; 3240 } 3241 } 3242 3243 private class SuggestionHelper { 3244 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3245 new SuggestionSpanComparator(); 3246 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3247 new HashMap<SuggestionSpan, Integer>(); 3248 3249 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3250 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3251 final int flag1 = span1.getFlags(); 3252 final int flag2 = span2.getFlags(); 3253 if (flag1 != flag2) { 3254 // The order here should match what is used in updateDrawState 3255 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3256 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3257 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3258 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3259 if (easy1 && !misspelled1) return -1; 3260 if (easy2 && !misspelled2) return 1; 3261 if (misspelled1) return -1; 3262 if (misspelled2) return 1; 3263 } 3264 3265 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3266 } 3267 } 3268 3269 /** 3270 * Returns the suggestion spans that cover the current cursor position. The suggestion 3271 * spans are sorted according to the length of text that they are attached to. 3272 */ 3273 private SuggestionSpan[] getSortedSuggestionSpans() { 3274 int pos = mTextView.getSelectionStart(); 3275 Spannable spannable = (Spannable) mTextView.getText(); 3276 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3277 3278 mSpansLengths.clear(); 3279 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3280 int start = spannable.getSpanStart(suggestionSpan); 3281 int end = spannable.getSpanEnd(suggestionSpan); 3282 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3283 } 3284 3285 // The suggestions are sorted according to their types (easy correction first, then 3286 // misspelled) and to the length of the text that they cover (shorter first). 3287 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3288 mSpansLengths.clear(); 3289 3290 return suggestionSpans; 3291 } 3292 3293 /** 3294 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3295 * position. 3296 * 3297 * @param suggestionInfos SuggestionInfo array the results will be set. 3298 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3299 * @return the number of suggestions actually fetched. 3300 */ 3301 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3302 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3303 final Spannable spannable = (Spannable) mTextView.getText(); 3304 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3305 final int nbSpans = suggestionSpans.length; 3306 if (nbSpans == 0) return 0; 3307 3308 int numberOfSuggestions = 0; 3309 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3310 final int spanStart = spannable.getSpanStart(suggestionSpan); 3311 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3312 3313 if (misspelledSpanInfo != null 3314 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3315 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3316 misspelledSpanInfo.mSpanStart = spanStart; 3317 misspelledSpanInfo.mSpanEnd = spanEnd; 3318 } 3319 3320 final String[] suggestions = suggestionSpan.getSuggestions(); 3321 final int nbSuggestions = suggestions.length; 3322 suggestionLoop: 3323 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3324 final String suggestion = suggestions[suggestionIndex]; 3325 for (int i = 0; i < numberOfSuggestions; i++) { 3326 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3327 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3328 final int otherSpanStart = 3329 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3330 final int otherSpanEnd = 3331 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3332 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3333 continue suggestionLoop; 3334 } 3335 } 3336 } 3337 3338 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3339 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3340 suggestionInfo.mSuggestionIndex = suggestionIndex; 3341 suggestionInfo.mSuggestionStart = 0; 3342 suggestionInfo.mSuggestionEnd = suggestion.length(); 3343 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3344 numberOfSuggestions++; 3345 if (numberOfSuggestions >= suggestionInfos.length) { 3346 return numberOfSuggestions; 3347 } 3348 } 3349 } 3350 return numberOfSuggestions; 3351 } 3352 } 3353 3354 @VisibleForTesting 3355 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3356 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3357 3358 // Key of intent extras for inserting new word into user dictionary. 3359 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3360 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3361 3362 private SuggestionInfo[] mSuggestionInfos; 3363 private int mNumberOfSuggestions; 3364 private boolean mCursorWasVisibleBeforeSuggestions; 3365 private boolean mIsShowingUp = false; 3366 private SuggestionAdapter mSuggestionsAdapter; 3367 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3368 private TextView mAddToDictionaryButton; 3369 private TextView mDeleteButton; 3370 private ListView mSuggestionListView; 3371 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3372 private int mContainerMarginWidth; 3373 private int mContainerMarginTop; 3374 private LinearLayout mContainerView; 3375 private Context mContext; // TODO: Make mContext final. 3376 3377 private class CustomPopupWindow extends PopupWindow { 3378 3379 @Override 3380 public void dismiss() { 3381 if (!isShowing()) { 3382 return; 3383 } 3384 super.dismiss(); 3385 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3386 3387 // Safe cast since show() checks that mTextView.getText() is an Editable 3388 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3389 3390 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3391 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3392 getInsertionController().show(); 3393 } 3394 } 3395 } 3396 3397 public SuggestionsPopupWindow() { 3398 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3399 } 3400 3401 @Override 3402 protected void setUp() { 3403 mContext = applyDefaultTheme(mTextView.getContext()); 3404 mHighlightSpan = new TextAppearanceSpan(mContext, 3405 mTextView.mTextEditSuggestionHighlightStyle); 3406 } 3407 3408 private Context applyDefaultTheme(Context originalContext) { 3409 TypedArray a = originalContext.obtainStyledAttributes( 3410 new int[]{com.android.internal.R.attr.isLightTheme}); 3411 boolean isLightTheme = a.getBoolean(0, true); 3412 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3413 : R.style.ThemeOverlay_Material_Dark; 3414 a.recycle(); 3415 return new ContextThemeWrapper(originalContext, themeId); 3416 } 3417 3418 @Override 3419 protected void createPopupWindow() { 3420 mPopupWindow = new CustomPopupWindow(); 3421 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3422 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3423 mPopupWindow.setFocusable(true); 3424 mPopupWindow.setClippingEnabled(false); 3425 } 3426 3427 @Override 3428 protected void initContentView() { 3429 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3430 Context.LAYOUT_INFLATER_SERVICE); 3431 mContentView = (ViewGroup) inflater.inflate( 3432 mTextView.mTextEditSuggestionContainerLayout, null); 3433 3434 mContainerView = (LinearLayout) mContentView.findViewById( 3435 com.android.internal.R.id.suggestionWindowContainer); 3436 ViewGroup.MarginLayoutParams lp = 3437 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3438 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3439 mContainerMarginTop = lp.topMargin; 3440 mClippingLimitLeft = lp.leftMargin; 3441 mClippingLimitRight = lp.rightMargin; 3442 3443 mSuggestionListView = (ListView) mContentView.findViewById( 3444 com.android.internal.R.id.suggestionContainer); 3445 3446 mSuggestionsAdapter = new SuggestionAdapter(); 3447 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3448 mSuggestionListView.setOnItemClickListener(this); 3449 3450 // Inflate the suggestion items once and for all. 3451 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3452 for (int i = 0; i < mSuggestionInfos.length; i++) { 3453 mSuggestionInfos[i] = new SuggestionInfo(); 3454 } 3455 3456 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3457 com.android.internal.R.id.addToDictionaryButton); 3458 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3459 public void onClick(View v) { 3460 final SuggestionSpan misspelledSpan = 3461 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3462 if (misspelledSpan == null) { 3463 // Span has been removed. 3464 return; 3465 } 3466 final Editable editable = (Editable) mTextView.getText(); 3467 final int spanStart = editable.getSpanStart(misspelledSpan); 3468 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3469 if (spanStart < 0 || spanEnd <= spanStart) { 3470 return; 3471 } 3472 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3473 3474 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3475 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3476 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3477 mTextView.getTextServicesLocale().toString()); 3478 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3479 mTextView.getContext().startActivity(intent); 3480 // There is no way to know if the word was indeed added. Re-check. 3481 // TODO The ExtractEditText should remove the span in the original text instead 3482 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3483 Selection.setSelection(editable, spanEnd); 3484 updateSpellCheckSpans(spanStart, spanEnd, false); 3485 hideWithCleanUp(); 3486 } 3487 }); 3488 3489 mDeleteButton = (TextView) mContentView.findViewById( 3490 com.android.internal.R.id.deleteButton); 3491 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3492 public void onClick(View v) { 3493 final Editable editable = (Editable) mTextView.getText(); 3494 3495 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3496 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3497 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3498 // Do not leave two adjacent spaces after deletion, or one at beginning of 3499 // text 3500 if (spanUnionEnd < editable.length() 3501 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3502 && (spanUnionStart == 0 3503 || Character.isSpaceChar( 3504 editable.charAt(spanUnionStart - 1)))) { 3505 spanUnionEnd = spanUnionEnd + 1; 3506 } 3507 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3508 } 3509 hideWithCleanUp(); 3510 } 3511 }); 3512 3513 } 3514 3515 public boolean isShowingUp() { 3516 return mIsShowingUp; 3517 } 3518 3519 public void onParentLostFocus() { 3520 mIsShowingUp = false; 3521 } 3522 3523 private class SuggestionAdapter extends BaseAdapter { 3524 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3525 Context.LAYOUT_INFLATER_SERVICE); 3526 3527 @Override 3528 public int getCount() { 3529 return mNumberOfSuggestions; 3530 } 3531 3532 @Override 3533 public Object getItem(int position) { 3534 return mSuggestionInfos[position]; 3535 } 3536 3537 @Override 3538 public long getItemId(int position) { 3539 return position; 3540 } 3541 3542 @Override 3543 public View getView(int position, View convertView, ViewGroup parent) { 3544 TextView textView = (TextView) convertView; 3545 3546 if (textView == null) { 3547 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3548 parent, false); 3549 } 3550 3551 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3552 textView.setText(suggestionInfo.mText); 3553 return textView; 3554 } 3555 } 3556 3557 @VisibleForTesting 3558 public ViewGroup getContentViewForTesting() { 3559 return mContentView; 3560 } 3561 3562 @Override 3563 public void show() { 3564 if (!(mTextView.getText() instanceof Editable)) return; 3565 if (extractedTextModeWillBeStarted()) { 3566 return; 3567 } 3568 3569 if (updateSuggestions()) { 3570 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3571 mTextView.setCursorVisible(false); 3572 mIsShowingUp = true; 3573 super.show(); 3574 } 3575 } 3576 3577 @Override 3578 protected void measureContent() { 3579 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3580 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3581 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3582 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3583 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3584 3585 int width = 0; 3586 View view = null; 3587 for (int i = 0; i < mNumberOfSuggestions; i++) { 3588 view = mSuggestionsAdapter.getView(i, view, mContentView); 3589 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3590 view.measure(horizontalMeasure, verticalMeasure); 3591 width = Math.max(width, view.getMeasuredWidth()); 3592 } 3593 3594 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3595 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3596 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3597 } 3598 3599 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3600 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3601 3602 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3603 + mContainerMarginWidth; 3604 3605 // Enforce the width based on actual text widths 3606 mContentView.measure( 3607 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3608 verticalMeasure); 3609 3610 Drawable popupBackground = mPopupWindow.getBackground(); 3611 if (popupBackground != null) { 3612 if (mTempRect == null) mTempRect = new Rect(); 3613 popupBackground.getPadding(mTempRect); 3614 width += mTempRect.left + mTempRect.right; 3615 } 3616 mPopupWindow.setWidth(width); 3617 } 3618 3619 @Override 3620 protected int getTextOffset() { 3621 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3622 } 3623 3624 @Override 3625 protected int getVerticalLocalPosition(int line) { 3626 return mTextView.getLayout().getLineBottom(line) - mContainerMarginTop; 3627 } 3628 3629 @Override 3630 protected int clipVertically(int positionY) { 3631 final int height = mContentView.getMeasuredHeight(); 3632 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3633 return Math.min(positionY, displayMetrics.heightPixels - height); 3634 } 3635 3636 private void hideWithCleanUp() { 3637 for (final SuggestionInfo info : mSuggestionInfos) { 3638 info.clear(); 3639 } 3640 mMisspelledSpanInfo.clear(); 3641 hide(); 3642 } 3643 3644 private boolean updateSuggestions() { 3645 Spannable spannable = (Spannable) mTextView.getText(); 3646 mNumberOfSuggestions = 3647 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3648 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3649 return false; 3650 } 3651 3652 int spanUnionStart = mTextView.getText().length(); 3653 int spanUnionEnd = 0; 3654 3655 for (int i = 0; i < mNumberOfSuggestions; i++) { 3656 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3657 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3658 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3659 } 3660 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3661 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3662 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3663 } 3664 3665 for (int i = 0; i < mNumberOfSuggestions; i++) { 3666 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3667 } 3668 3669 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3670 int addToDictionaryButtonVisibility = View.GONE; 3671 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3672 if (mMisspelledSpanInfo.mSpanStart >= 0 3673 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3674 addToDictionaryButtonVisibility = View.VISIBLE; 3675 } 3676 } 3677 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3678 3679 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3680 final int underlineColor; 3681 if (mNumberOfSuggestions != 0) { 3682 underlineColor = 3683 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3684 } else { 3685 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3686 } 3687 3688 if (underlineColor == 0) { 3689 // Fallback on the default highlight color when the first span does not provide one 3690 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3691 } else { 3692 final float BACKGROUND_TRANSPARENCY = 0.4f; 3693 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3694 mSuggestionRangeSpan.setBackgroundColor( 3695 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3696 } 3697 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3698 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3699 3700 mSuggestionsAdapter.notifyDataSetChanged(); 3701 return true; 3702 } 3703 3704 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3705 int unionEnd) { 3706 final Spannable text = (Spannable) mTextView.getText(); 3707 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3708 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3709 3710 // Adjust the start/end of the suggestion span 3711 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3712 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3713 + suggestionInfo.mText.length(); 3714 3715 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3716 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3717 3718 // Add the text before and after the span. 3719 final String textAsString = text.toString(); 3720 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3721 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3722 } 3723 3724 @Override 3725 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3726 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3727 replaceWithSuggestion(suggestionInfo); 3728 hideWithCleanUp(); 3729 } 3730 } 3731 3732 /** 3733 * An ActionMode Callback class that is used to provide actions while in text insertion or 3734 * selection mode. 3735 * 3736 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3737 * actions, depending on which of these this TextView supports and the current selection. 3738 */ 3739 private class TextActionModeCallback extends ActionMode.Callback2 { 3740 private final Path mSelectionPath = new Path(); 3741 private final RectF mSelectionBounds = new RectF(); 3742 private final boolean mHasSelection; 3743 private final int mHandleHeight; 3744 3745 public TextActionModeCallback(boolean hasSelection) { 3746 mHasSelection = hasSelection; 3747 if (mHasSelection) { 3748 SelectionModifierCursorController selectionController = getSelectionController(); 3749 if (selectionController.mStartHandle == null) { 3750 // As these are for initializing selectionController, hide() must be called. 3751 selectionController.initDrawables(); 3752 selectionController.initHandles(); 3753 selectionController.hide(); 3754 } 3755 mHandleHeight = Math.max( 3756 mSelectHandleLeft.getMinimumHeight(), 3757 mSelectHandleRight.getMinimumHeight()); 3758 } else { 3759 InsertionPointCursorController insertionController = getInsertionController(); 3760 if (insertionController != null) { 3761 insertionController.getHandle(); 3762 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3763 } else { 3764 mHandleHeight = 0; 3765 } 3766 } 3767 } 3768 3769 @Override 3770 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3771 mode.setTitle(null); 3772 mode.setSubtitle(null); 3773 mode.setTitleOptionalHint(true); 3774 populateMenuWithItems(menu); 3775 updateAssistMenuItem(menu); 3776 3777 Callback customCallback = getCustomCallback(); 3778 if (customCallback != null) { 3779 if (!customCallback.onCreateActionMode(mode, menu)) { 3780 // The custom mode can choose to cancel the action mode, dismiss selection. 3781 Selection.setSelection((Spannable) mTextView.getText(), 3782 mTextView.getSelectionEnd()); 3783 return false; 3784 } 3785 } 3786 3787 if (mTextView.canProcessText()) { 3788 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3789 } 3790 3791 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3792 if (mHasSelection && !mTextView.hasTransientState()) { 3793 mTextView.setHasTransientState(true); 3794 } 3795 return true; 3796 } else { 3797 return false; 3798 } 3799 } 3800 3801 private Callback getCustomCallback() { 3802 return mHasSelection 3803 ? mCustomSelectionActionModeCallback 3804 : mCustomInsertionActionModeCallback; 3805 } 3806 3807 private void populateMenuWithItems(Menu menu) { 3808 if (mTextView.canCut()) { 3809 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3810 com.android.internal.R.string.cut) 3811 .setAlphabeticShortcut('x') 3812 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3813 } 3814 3815 if (mTextView.canCopy()) { 3816 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3817 com.android.internal.R.string.copy) 3818 .setAlphabeticShortcut('c') 3819 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3820 } 3821 3822 if (mTextView.canPaste()) { 3823 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3824 com.android.internal.R.string.paste) 3825 .setAlphabeticShortcut('v') 3826 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3827 } 3828 3829 if (mTextView.canShare()) { 3830 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3831 com.android.internal.R.string.share) 3832 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3833 } 3834 3835 if (mTextView.canRequestAutofill()) { 3836 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3837 com.android.internal.R.string.autofill) 3838 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3839 } 3840 3841 updateSelectAllItem(menu); 3842 updateReplaceItem(menu); 3843 } 3844 3845 @Override 3846 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3847 updateSelectAllItem(menu); 3848 updateReplaceItem(menu); 3849 updateAssistMenuItem(menu); 3850 3851 Callback customCallback = getCustomCallback(); 3852 if (customCallback != null) { 3853 return customCallback.onPrepareActionMode(mode, menu); 3854 } 3855 return true; 3856 } 3857 3858 private void updateSelectAllItem(Menu menu) { 3859 boolean canSelectAll = mTextView.canSelectAllText(); 3860 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3861 if (canSelectAll && !selectAllItemExists) { 3862 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3863 com.android.internal.R.string.selectAll) 3864 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3865 } else if (!canSelectAll && selectAllItemExists) { 3866 menu.removeItem(TextView.ID_SELECT_ALL); 3867 } 3868 } 3869 3870 private void updateReplaceItem(Menu menu) { 3871 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3872 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3873 if (canReplace && !replaceItemExists) { 3874 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3875 com.android.internal.R.string.replace) 3876 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3877 } else if (!canReplace && replaceItemExists) { 3878 menu.removeItem(TextView.ID_REPLACE); 3879 } 3880 } 3881 3882 private void updateAssistMenuItem(Menu menu) { 3883 menu.removeItem(TextView.ID_ASSIST); 3884 final TextClassificationResult textClassificationResult = 3885 getSelectionActionModeHelper().getTextClassificationResult(); 3886 if (textClassificationResult != null) { 3887 final Drawable icon = textClassificationResult.getIcon(); 3888 final CharSequence label = textClassificationResult.getLabel(); 3889 final OnClickListener onClickListener = 3890 textClassificationResult.getOnClickListener(); 3891 final Intent intent = textClassificationResult.getIntent(); 3892 if ((icon != null || !TextUtils.isEmpty(label)) 3893 && (onClickListener != null || intent != null)) { 3894 menu.add(TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, label) 3895 .setIcon(icon) 3896 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3897 } 3898 } 3899 } 3900 3901 @Override 3902 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3903 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3904 return true; 3905 } 3906 Callback customCallback = getCustomCallback(); 3907 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3908 return true; 3909 } 3910 final TextClassificationResult textClassificationResult = 3911 getSelectionActionModeHelper().getTextClassificationResult(); 3912 if (TextView.ID_ASSIST == item.getItemId() && textClassificationResult != null) { 3913 final OnClickListener onClickListener = 3914 textClassificationResult.getOnClickListener(); 3915 if (onClickListener != null) { 3916 onClickListener.onClick(mTextView); 3917 } else { 3918 final Intent intent = textClassificationResult.getIntent(); 3919 if (intent != null) { 3920 TextClassificationResult.createStartActivityOnClickListener( 3921 mTextView.getContext(), intent) 3922 .onClick(mTextView); 3923 } 3924 } 3925 stopTextActionMode(); 3926 return true; 3927 } 3928 return mTextView.onTextContextMenuItem(item.getItemId()); 3929 } 3930 3931 @Override 3932 public void onDestroyActionMode(ActionMode mode) { 3933 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3934 getSelectionActionModeHelper().onDestroyActionMode(); 3935 mTextActionMode = null; 3936 Callback customCallback = getCustomCallback(); 3937 if (customCallback != null) { 3938 customCallback.onDestroyActionMode(mode); 3939 } 3940 3941 if (!mPreserveSelection) { 3942 /* 3943 * Leave current selection when we tentatively destroy action mode for the 3944 * selection. If we're detaching from a window, we'll bring back the selection 3945 * mode when (if) we get reattached. 3946 */ 3947 Selection.setSelection((Spannable) mTextView.getText(), 3948 mTextView.getSelectionEnd()); 3949 } 3950 3951 if (mSelectionModifierCursorController != null) { 3952 mSelectionModifierCursorController.hide(); 3953 } 3954 } 3955 3956 @Override 3957 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3958 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3959 super.onGetContentRect(mode, view, outRect); 3960 return; 3961 } 3962 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3963 // We have a selection. 3964 mSelectionPath.reset(); 3965 mTextView.getLayout().getSelectionPath( 3966 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3967 mSelectionPath.computeBounds(mSelectionBounds, true); 3968 mSelectionBounds.bottom += mHandleHeight; 3969 } else if (mCursorCount == 2) { 3970 // We have a split cursor. In this case, we take the rectangle that includes both 3971 // parts of the cursor to ensure we don't obscure either of them. 3972 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3973 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3974 mSelectionBounds.set( 3975 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3976 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3977 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3978 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3979 + mHandleHeight); 3980 } else { 3981 // We have a single cursor. 3982 Layout layout = mTextView.getLayout(); 3983 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 3984 float primaryHorizontal = clampHorizontalPosition(null, 3985 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 3986 mSelectionBounds.set( 3987 primaryHorizontal, 3988 layout.getLineTop(line), 3989 primaryHorizontal, 3990 layout.getLineTop(line + 1) + mHandleHeight); 3991 } 3992 // Take TextView's padding and scroll into account. 3993 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3994 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3995 outRect.set( 3996 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3997 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3998 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3999 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4000 } 4001 } 4002 4003 /** 4004 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4005 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4006 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4007 */ 4008 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4009 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4010 final int[] mTmpIntOffset = new int[2]; 4011 final Matrix mViewToScreenMatrix = new Matrix(); 4012 4013 @Override 4014 public void updatePosition(int parentPositionX, int parentPositionY, 4015 boolean parentPositionChanged, boolean parentScrolled) { 4016 final InputMethodState ims = mInputMethodState; 4017 if (ims == null || ims.mBatchEditNesting > 0) { 4018 return; 4019 } 4020 final InputMethodManager imm = InputMethodManager.peekInstance(); 4021 if (null == imm) { 4022 return; 4023 } 4024 if (!imm.isActive(mTextView)) { 4025 return; 4026 } 4027 // Skip if the IME has not requested the cursor/anchor position. 4028 if (!imm.isCursorAnchorInfoEnabled()) { 4029 return; 4030 } 4031 Layout layout = mTextView.getLayout(); 4032 if (layout == null) { 4033 return; 4034 } 4035 4036 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4037 builder.reset(); 4038 4039 final int selectionStart = mTextView.getSelectionStart(); 4040 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4041 4042 // Construct transformation matrix from view local coordinates to screen coordinates. 4043 mViewToScreenMatrix.set(mTextView.getMatrix()); 4044 mTextView.getLocationOnScreen(mTmpIntOffset); 4045 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4046 builder.setMatrix(mViewToScreenMatrix); 4047 4048 final float viewportToContentHorizontalOffset = 4049 mTextView.viewportToContentHorizontalOffset(); 4050 final float viewportToContentVerticalOffset = 4051 mTextView.viewportToContentVerticalOffset(); 4052 4053 final CharSequence text = mTextView.getText(); 4054 if (text instanceof Spannable) { 4055 final Spannable sp = (Spannable) text; 4056 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4057 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4058 if (composingTextEnd < composingTextStart) { 4059 final int temp = composingTextEnd; 4060 composingTextEnd = composingTextStart; 4061 composingTextStart = temp; 4062 } 4063 final boolean hasComposingText = 4064 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4065 if (hasComposingText) { 4066 final CharSequence composingText = text.subSequence(composingTextStart, 4067 composingTextEnd); 4068 builder.setComposingText(composingTextStart, composingText); 4069 mTextView.populateCharacterBounds(builder, composingTextStart, 4070 composingTextEnd, viewportToContentHorizontalOffset, 4071 viewportToContentVerticalOffset); 4072 } 4073 } 4074 4075 // Treat selectionStart as the insertion point. 4076 if (0 <= selectionStart) { 4077 final int offset = selectionStart; 4078 final int line = layout.getLineForOffset(offset); 4079 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4080 + viewportToContentHorizontalOffset; 4081 final float insertionMarkerTop = layout.getLineTop(line) 4082 + viewportToContentVerticalOffset; 4083 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4084 + viewportToContentVerticalOffset; 4085 final float insertionMarkerBottom = layout.getLineBottom(line) 4086 + viewportToContentVerticalOffset; 4087 final boolean isTopVisible = mTextView 4088 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4089 final boolean isBottomVisible = mTextView 4090 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4091 int insertionMarkerFlags = 0; 4092 if (isTopVisible || isBottomVisible) { 4093 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4094 } 4095 if (!isTopVisible || !isBottomVisible) { 4096 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4097 } 4098 if (layout.isRtlCharAt(offset)) { 4099 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4100 } 4101 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4102 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4103 } 4104 4105 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4106 } 4107 } 4108 4109 @VisibleForTesting 4110 public abstract class HandleView extends View implements TextViewPositionListener { 4111 protected Drawable mDrawable; 4112 protected Drawable mDrawableLtr; 4113 protected Drawable mDrawableRtl; 4114 private final PopupWindow mContainer; 4115 // Position with respect to the parent TextView 4116 private int mPositionX, mPositionY; 4117 private boolean mIsDragging; 4118 // Offset from touch position to mPosition 4119 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4120 protected int mHotspotX; 4121 protected int mHorizontalGravity; 4122 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4123 private float mTouchOffsetY; 4124 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4125 private float mIdealVerticalOffset; 4126 // Parent's (TextView) previous position in window 4127 private int mLastParentX, mLastParentY; 4128 // Parent's (TextView) previous position on screen 4129 private int mLastParentXOnScreen, mLastParentYOnScreen; 4130 // Previous text character offset 4131 protected int mPreviousOffset = -1; 4132 // Previous text character offset 4133 private boolean mPositionHasChanged = true; 4134 // Minimum touch target size for handles 4135 private int mMinSize; 4136 // Indicates the line of text that the handle is on. 4137 protected int mPrevLine = UNSET_LINE; 4138 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4139 // when selecting text when the handles jump to the end / start of words which may be on 4140 // a different line. 4141 protected int mPreviousLineTouched = UNSET_LINE; 4142 4143 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4144 super(mTextView.getContext()); 4145 setId(id); 4146 mContainer = new PopupWindow(mTextView.getContext(), null, 4147 com.android.internal.R.attr.textSelectHandleWindowStyle); 4148 mContainer.setSplitTouchEnabled(true); 4149 mContainer.setClippingEnabled(false); 4150 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4151 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4152 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4153 mContainer.setContentView(this); 4154 4155 mDrawableLtr = drawableLtr; 4156 mDrawableRtl = drawableRtl; 4157 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4158 com.android.internal.R.dimen.text_handle_min_size); 4159 4160 updateDrawable(); 4161 4162 final int handleHeight = getPreferredHeight(); 4163 mTouchOffsetY = -0.3f * handleHeight; 4164 mIdealVerticalOffset = 0.7f * handleHeight; 4165 } 4166 4167 public float getIdealVerticalOffset() { 4168 return mIdealVerticalOffset; 4169 } 4170 4171 protected void updateDrawable() { 4172 if (mIsDragging) { 4173 // Don't update drawable during dragging. 4174 return; 4175 } 4176 final Layout layout = mTextView.getLayout(); 4177 if (layout == null) { 4178 return; 4179 } 4180 final int offset = getCurrentCursorOffset(); 4181 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4182 final Drawable oldDrawable = mDrawable; 4183 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4184 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4185 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4186 if (oldDrawable != mDrawable && isShowing()) { 4187 // Update popup window position. 4188 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4189 - getHorizontalOffset() + getCursorOffset(); 4190 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4191 mPositionHasChanged = true; 4192 updatePosition(mLastParentX, mLastParentY, false, false); 4193 postInvalidate(); 4194 } 4195 } 4196 4197 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4198 protected abstract int getHorizontalGravity(boolean isRtlRun); 4199 4200 // Touch-up filter: number of previous positions remembered 4201 private static final int HISTORY_SIZE = 5; 4202 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4203 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4204 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4205 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4206 private int mPreviousOffsetIndex = 0; 4207 private int mNumberPreviousOffsets = 0; 4208 4209 private void startTouchUpFilter(int offset) { 4210 mNumberPreviousOffsets = 0; 4211 addPositionToTouchUpFilter(offset); 4212 } 4213 4214 private void addPositionToTouchUpFilter(int offset) { 4215 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4216 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4217 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4218 mNumberPreviousOffsets++; 4219 } 4220 4221 private void filterOnTouchUp() { 4222 final long now = SystemClock.uptimeMillis(); 4223 int i = 0; 4224 int index = mPreviousOffsetIndex; 4225 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4226 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4227 i++; 4228 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4229 } 4230 4231 if (i > 0 && i < iMax 4232 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4233 positionAtCursorOffset(mPreviousOffsets[index], false); 4234 } 4235 } 4236 4237 public boolean offsetHasBeenChanged() { 4238 return mNumberPreviousOffsets > 1; 4239 } 4240 4241 @Override 4242 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4243 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4244 } 4245 4246 @Override 4247 public void invalidate() { 4248 super.invalidate(); 4249 if (isShowing()) { 4250 positionAtCursorOffset(getCurrentCursorOffset(), true); 4251 } 4252 }; 4253 4254 private int getPreferredWidth() { 4255 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4256 } 4257 4258 private int getPreferredHeight() { 4259 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4260 } 4261 4262 public void show() { 4263 if (isShowing()) return; 4264 4265 getPositionListener().addSubscriber(this, true /* local position may change */); 4266 4267 // Make sure the offset is always considered new, even when focusing at same position 4268 mPreviousOffset = -1; 4269 positionAtCursorOffset(getCurrentCursorOffset(), false); 4270 } 4271 4272 protected void dismiss() { 4273 mIsDragging = false; 4274 mContainer.dismiss(); 4275 onDetached(); 4276 } 4277 4278 public void hide() { 4279 dismiss(); 4280 4281 getPositionListener().removeSubscriber(this); 4282 } 4283 4284 public boolean isShowing() { 4285 return mContainer.isShowing(); 4286 } 4287 4288 private boolean isVisible() { 4289 // Always show a dragging handle. 4290 if (mIsDragging) { 4291 return true; 4292 } 4293 4294 if (mTextView.isInBatchEditMode()) { 4295 return false; 4296 } 4297 4298 return mTextView.isPositionVisible( 4299 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4300 } 4301 4302 public abstract int getCurrentCursorOffset(); 4303 4304 protected abstract void updateSelection(int offset); 4305 4306 public abstract void updatePosition(float x, float y); 4307 4308 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4309 return layout.isRtlCharAt(offset); 4310 } 4311 4312 @VisibleForTesting 4313 public float getHorizontal(@NonNull Layout layout, int offset) { 4314 return layout.getPrimaryHorizontal(offset); 4315 } 4316 4317 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4318 return mTextView.getOffsetAtCoordinate(line, x); 4319 } 4320 4321 /** 4322 * @param offset Cursor offset. Must be in [-1, length]. 4323 * @param forceUpdatePosition whether to force update the position. This should be true 4324 * when If the parent has been scrolled, for example. 4325 */ 4326 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4327 // A HandleView relies on the layout, which may be nulled by external methods 4328 Layout layout = mTextView.getLayout(); 4329 if (layout == null) { 4330 // Will update controllers' state, hiding them and stopping selection mode if needed 4331 prepareCursorControllers(); 4332 return; 4333 } 4334 layout = mTextView.getLayout(); 4335 4336 boolean offsetChanged = offset != mPreviousOffset; 4337 if (offsetChanged || forceUpdatePosition) { 4338 if (offsetChanged) { 4339 updateSelection(offset); 4340 addPositionToTouchUpFilter(offset); 4341 } 4342 final int line = layout.getLineForOffset(offset); 4343 mPrevLine = line; 4344 4345 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4346 - getHorizontalOffset() + getCursorOffset(); 4347 mPositionY = layout.getLineBottom(line); 4348 4349 // Take TextView's padding and scroll into account. 4350 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4351 mPositionY += mTextView.viewportToContentVerticalOffset(); 4352 4353 mPreviousOffset = offset; 4354 mPositionHasChanged = true; 4355 } 4356 } 4357 4358 /** 4359 * Return the clamped horizontal position for the first cursor. 4360 * 4361 * @param layout Text layout. 4362 * @param offset Character offset for the cursor. 4363 * @return The clamped horizontal position for the cursor. 4364 */ 4365 int getCursorHorizontalPosition(Layout layout, int offset) { 4366 return (int) (getHorizontal(layout, offset) - 0.5f); 4367 } 4368 4369 @Override 4370 public void updatePosition(int parentPositionX, int parentPositionY, 4371 boolean parentPositionChanged, boolean parentScrolled) { 4372 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 4373 if (parentPositionChanged || mPositionHasChanged) { 4374 if (mIsDragging) { 4375 // Update touchToWindow offset in case of parent scrolling while dragging 4376 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4377 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4378 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4379 mLastParentX = parentPositionX; 4380 mLastParentY = parentPositionY; 4381 } 4382 4383 onHandleMoved(); 4384 } 4385 4386 if (isVisible()) { 4387 // Transform to the window coordinates to follow the view tranformation. 4388 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4389 mTextView.transformFromViewToWindowSpace(pts); 4390 pts[0] -= mHotspotX + getHorizontalOffset(); 4391 4392 if (isShowing()) { 4393 mContainer.update(pts[0], pts[1], -1, -1); 4394 } else { 4395 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4396 } 4397 } else { 4398 if (isShowing()) { 4399 dismiss(); 4400 } 4401 } 4402 4403 mPositionHasChanged = false; 4404 } 4405 } 4406 4407 @Override 4408 protected void onDraw(Canvas c) { 4409 final int drawWidth = mDrawable.getIntrinsicWidth(); 4410 final int left = getHorizontalOffset(); 4411 4412 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4413 mDrawable.draw(c); 4414 } 4415 4416 private int getHorizontalOffset() { 4417 final int width = getPreferredWidth(); 4418 final int drawWidth = mDrawable.getIntrinsicWidth(); 4419 final int left; 4420 switch (mHorizontalGravity) { 4421 case Gravity.LEFT: 4422 left = 0; 4423 break; 4424 default: 4425 case Gravity.CENTER: 4426 left = (width - drawWidth) / 2; 4427 break; 4428 case Gravity.RIGHT: 4429 left = width - drawWidth; 4430 break; 4431 } 4432 return left; 4433 } 4434 4435 protected int getCursorOffset() { 4436 return 0; 4437 } 4438 4439 @Override 4440 public boolean onTouchEvent(MotionEvent ev) { 4441 updateFloatingToolbarVisibility(ev); 4442 4443 switch (ev.getActionMasked()) { 4444 case MotionEvent.ACTION_DOWN: { 4445 startTouchUpFilter(getCurrentCursorOffset()); 4446 4447 final PositionListener positionListener = getPositionListener(); 4448 mLastParentX = positionListener.getPositionX(); 4449 mLastParentY = positionListener.getPositionY(); 4450 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4451 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4452 4453 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4454 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4455 mTouchToWindowOffsetX = xInWindow - mPositionX; 4456 mTouchToWindowOffsetY = yInWindow - mPositionY; 4457 4458 mIsDragging = true; 4459 mPreviousLineTouched = UNSET_LINE; 4460 break; 4461 } 4462 4463 case MotionEvent.ACTION_MOVE: { 4464 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4465 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4466 4467 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4468 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4469 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4470 float newVerticalOffset; 4471 if (previousVerticalOffset < mIdealVerticalOffset) { 4472 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4473 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4474 } else { 4475 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4476 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4477 } 4478 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4479 4480 final float newPosX = 4481 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4482 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4483 4484 updatePosition(newPosX, newPosY); 4485 break; 4486 } 4487 4488 case MotionEvent.ACTION_UP: 4489 filterOnTouchUp(); 4490 mIsDragging = false; 4491 updateDrawable(); 4492 break; 4493 4494 case MotionEvent.ACTION_CANCEL: 4495 mIsDragging = false; 4496 updateDrawable(); 4497 break; 4498 } 4499 return true; 4500 } 4501 4502 public boolean isDragging() { 4503 return mIsDragging; 4504 } 4505 4506 void onHandleMoved() {} 4507 4508 public void onDetached() {} 4509 } 4510 4511 private class InsertionHandleView extends HandleView { 4512 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4513 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4514 4515 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4516 private float mDownPositionX, mDownPositionY; 4517 private Runnable mHider; 4518 4519 public InsertionHandleView(Drawable drawable) { 4520 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4521 } 4522 4523 @Override 4524 public void show() { 4525 super.show(); 4526 4527 final long durationSinceCutOrCopy = 4528 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4529 4530 // Cancel the single tap delayed runnable. 4531 if (mInsertionActionModeRunnable != null 4532 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4533 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4534 || isCursorInsideEasyCorrectionSpan())) { 4535 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4536 } 4537 4538 // Prepare and schedule the single tap runnable to run exactly after the double tap 4539 // timeout has passed. 4540 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4541 && !isCursorInsideEasyCorrectionSpan() 4542 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4543 if (mTextActionMode == null) { 4544 if (mInsertionActionModeRunnable == null) { 4545 mInsertionActionModeRunnable = new Runnable() { 4546 @Override 4547 public void run() { 4548 startInsertionActionMode(); 4549 } 4550 }; 4551 } 4552 mTextView.postDelayed( 4553 mInsertionActionModeRunnable, 4554 ViewConfiguration.getDoubleTapTimeout() + 1); 4555 } 4556 4557 } 4558 4559 hideAfterDelay(); 4560 } 4561 4562 private void hideAfterDelay() { 4563 if (mHider == null) { 4564 mHider = new Runnable() { 4565 public void run() { 4566 hide(); 4567 } 4568 }; 4569 } else { 4570 removeHiderCallback(); 4571 } 4572 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4573 } 4574 4575 private void removeHiderCallback() { 4576 if (mHider != null) { 4577 mTextView.removeCallbacks(mHider); 4578 } 4579 } 4580 4581 @Override 4582 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4583 return drawable.getIntrinsicWidth() / 2; 4584 } 4585 4586 @Override 4587 protected int getHorizontalGravity(boolean isRtlRun) { 4588 return Gravity.CENTER_HORIZONTAL; 4589 } 4590 4591 @Override 4592 protected int getCursorOffset() { 4593 int offset = super.getCursorOffset(); 4594 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4595 if (cursor != null) { 4596 cursor.getPadding(mTempRect); 4597 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4598 } 4599 return offset; 4600 } 4601 4602 @Override 4603 int getCursorHorizontalPosition(Layout layout, int offset) { 4604 final Drawable drawable = mCursorCount > 0 ? mCursorDrawable[0] : null; 4605 if (drawable != null) { 4606 final float horizontal = getHorizontal(layout, offset); 4607 return clampHorizontalPosition(drawable, horizontal) + mTempRect.left; 4608 } 4609 return super.getCursorHorizontalPosition(layout, offset); 4610 } 4611 4612 @Override 4613 public boolean onTouchEvent(MotionEvent ev) { 4614 final boolean result = super.onTouchEvent(ev); 4615 4616 switch (ev.getActionMasked()) { 4617 case MotionEvent.ACTION_DOWN: 4618 mDownPositionX = ev.getRawX(); 4619 mDownPositionY = ev.getRawY(); 4620 break; 4621 4622 case MotionEvent.ACTION_UP: 4623 if (!offsetHasBeenChanged()) { 4624 final float deltaX = mDownPositionX - ev.getRawX(); 4625 final float deltaY = mDownPositionY - ev.getRawY(); 4626 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4627 4628 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4629 mTextView.getContext()); 4630 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4631 4632 if (distanceSquared < touchSlop * touchSlop) { 4633 // Tapping on the handle toggles the insertion action mode. 4634 if (mTextActionMode != null) { 4635 stopTextActionMode(); 4636 } else { 4637 startInsertionActionMode(); 4638 } 4639 } 4640 } else { 4641 if (mTextActionMode != null) { 4642 mTextActionMode.invalidateContentRect(); 4643 } 4644 } 4645 hideAfterDelay(); 4646 break; 4647 4648 case MotionEvent.ACTION_CANCEL: 4649 hideAfterDelay(); 4650 break; 4651 4652 default: 4653 break; 4654 } 4655 4656 return result; 4657 } 4658 4659 @Override 4660 public int getCurrentCursorOffset() { 4661 return mTextView.getSelectionStart(); 4662 } 4663 4664 @Override 4665 public void updateSelection(int offset) { 4666 Selection.setSelection((Spannable) mTextView.getText(), offset); 4667 } 4668 4669 @Override 4670 public void updatePosition(float x, float y) { 4671 Layout layout = mTextView.getLayout(); 4672 int offset; 4673 if (layout != null) { 4674 if (mPreviousLineTouched == UNSET_LINE) { 4675 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4676 } 4677 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4678 offset = getOffsetAtCoordinate(layout, currLine, x); 4679 mPreviousLineTouched = currLine; 4680 } else { 4681 offset = -1; 4682 } 4683 positionAtCursorOffset(offset, false); 4684 if (mTextActionMode != null) { 4685 invalidateActionModeAsync(); 4686 } 4687 } 4688 4689 @Override 4690 void onHandleMoved() { 4691 super.onHandleMoved(); 4692 removeHiderCallback(); 4693 } 4694 4695 @Override 4696 public void onDetached() { 4697 super.onDetached(); 4698 removeHiderCallback(); 4699 } 4700 } 4701 4702 @Retention(RetentionPolicy.SOURCE) 4703 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4704 public @interface HandleType {} 4705 public static final int HANDLE_TYPE_SELECTION_START = 0; 4706 public static final int HANDLE_TYPE_SELECTION_END = 1; 4707 4708 private class SelectionHandleView extends HandleView { 4709 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4710 // end (HANDLE_TYPE_SELECTION_END). 4711 @HandleType 4712 private final int mHandleType; 4713 // Indicates whether the cursor is making adjustments within a word. 4714 private boolean mInWord = false; 4715 // Difference between touch position and word boundary position. 4716 private float mTouchWordDelta; 4717 // X value of the previous updatePosition call. 4718 private float mPrevX; 4719 // Indicates if the handle has moved a boundary between LTR and RTL text. 4720 private boolean mLanguageDirectionChanged = false; 4721 // Distance from edge of horizontally scrolling text view 4722 // to use to switch to character mode. 4723 private final float mTextViewEdgeSlop; 4724 // Used to save text view location. 4725 private final int[] mTextViewLocation = new int[2]; 4726 4727 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4728 @HandleType int handleType) { 4729 super(drawableLtr, drawableRtl, id); 4730 mHandleType = handleType; 4731 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4732 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4733 } 4734 4735 private boolean isStartHandle() { 4736 return mHandleType == HANDLE_TYPE_SELECTION_START; 4737 } 4738 4739 @Override 4740 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4741 if (isRtlRun == isStartHandle()) { 4742 return drawable.getIntrinsicWidth() / 4; 4743 } else { 4744 return (drawable.getIntrinsicWidth() * 3) / 4; 4745 } 4746 } 4747 4748 @Override 4749 protected int getHorizontalGravity(boolean isRtlRun) { 4750 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4751 } 4752 4753 @Override 4754 public int getCurrentCursorOffset() { 4755 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4756 } 4757 4758 @Override 4759 protected void updateSelection(int offset) { 4760 if (isStartHandle()) { 4761 Selection.setSelection((Spannable) mTextView.getText(), offset, 4762 mTextView.getSelectionEnd()); 4763 } else { 4764 Selection.setSelection((Spannable) mTextView.getText(), 4765 mTextView.getSelectionStart(), offset); 4766 } 4767 updateDrawable(); 4768 if (mTextActionMode != null) { 4769 invalidateActionModeAsync(); 4770 } 4771 } 4772 4773 @Override 4774 public void updatePosition(float x, float y) { 4775 final Layout layout = mTextView.getLayout(); 4776 if (layout == null) { 4777 // HandleView will deal appropriately in positionAtCursorOffset when 4778 // layout is null. 4779 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y)); 4780 return; 4781 } 4782 4783 if (mPreviousLineTouched == UNSET_LINE) { 4784 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4785 } 4786 4787 boolean positionCursor = false; 4788 final int anotherHandleOffset = 4789 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4790 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4791 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4792 4793 if (isStartHandle() && initialOffset >= anotherHandleOffset 4794 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4795 // Handles have crossed, bound it to the first selected line and 4796 // adjust by word / char as normal. 4797 currLine = layout.getLineForOffset(anotherHandleOffset); 4798 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4799 } 4800 4801 int offset = initialOffset; 4802 final int wordEnd = getWordEnd(offset); 4803 final int wordStart = getWordStart(offset); 4804 4805 if (mPrevX == UNSET_X_VALUE) { 4806 mPrevX = x; 4807 } 4808 4809 final int currentOffset = getCurrentCursorOffset(); 4810 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4811 final boolean atRtl = isAtRtlRun(layout, offset); 4812 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4813 4814 // We can't determine if the user is expanding or shrinking the selection if they're 4815 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4816 // the cursor at the current position. 4817 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4818 // We're on a boundary or this is the first direction change -- just update 4819 // to the current position. 4820 mLanguageDirectionChanged = true; 4821 mTouchWordDelta = 0.0f; 4822 positionAndAdjustForCrossingHandles(offset); 4823 return; 4824 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4825 // We've just moved past the boundary so update the position. After this we can 4826 // figure out if the user is expanding or shrinking to go by word or character. 4827 positionAndAdjustForCrossingHandles(offset); 4828 mTouchWordDelta = 0.0f; 4829 mLanguageDirectionChanged = false; 4830 return; 4831 } 4832 4833 boolean isExpanding; 4834 final float xDiff = x - mPrevX; 4835 if (isStartHandle()) { 4836 isExpanding = currLine < mPreviousLineTouched; 4837 } else { 4838 isExpanding = currLine > mPreviousLineTouched; 4839 } 4840 if (atRtl == isStartHandle()) { 4841 isExpanding |= xDiff > 0; 4842 } else { 4843 isExpanding |= xDiff < 0; 4844 } 4845 4846 if (mTextView.getHorizontallyScrolling()) { 4847 if (positionNearEdgeOfScrollingView(x, atRtl) 4848 && ((isStartHandle() && mTextView.getScrollX() != 0) 4849 || (!isStartHandle() 4850 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4851 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4852 || (!isStartHandle() && offset > currentOffset))) 4853 || !isExpanding)) { 4854 // If we're expanding ensure that the offset is actually expanding compared to 4855 // the current offset, if the handle snapped to the word, the finger position 4856 // may be out of sync and we don't want the selection to jump back. 4857 mTouchWordDelta = 0.0f; 4858 final int nextOffset = (atRtl == isStartHandle()) 4859 ? layout.getOffsetToRightOf(mPreviousOffset) 4860 : layout.getOffsetToLeftOf(mPreviousOffset); 4861 positionAndAdjustForCrossingHandles(nextOffset); 4862 return; 4863 } 4864 } 4865 4866 if (isExpanding) { 4867 // User is increasing the selection. 4868 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4869 final boolean snapToWord = (!mInWord 4870 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4871 && atRtl == isAtRtlRun(layout, wordBoundary); 4872 if (snapToWord) { 4873 // Sometimes words can be broken across lines (Chinese, hyphenation). 4874 // We still snap to the word boundary but we only use the letters on the 4875 // current line to determine if the user is far enough into the word to snap. 4876 if (layout.getLineForOffset(wordBoundary) != currLine) { 4877 wordBoundary = isStartHandle() 4878 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4879 } 4880 final int offsetThresholdToSnap = isStartHandle() 4881 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4882 : wordStart + ((wordBoundary - wordStart) / 2); 4883 if (isStartHandle() 4884 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4885 // User is far enough into the word or on a different line so we expand by 4886 // word. 4887 offset = wordStart; 4888 } else if (!isStartHandle() 4889 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4890 // User is far enough into the word or on a different line so we expand by 4891 // word. 4892 offset = wordEnd; 4893 } else { 4894 offset = mPreviousOffset; 4895 } 4896 } 4897 if ((isStartHandle() && offset < initialOffset) 4898 || (!isStartHandle() && offset > initialOffset)) { 4899 final float adjustedX = getHorizontal(layout, offset); 4900 mTouchWordDelta = 4901 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4902 } else { 4903 mTouchWordDelta = 0.0f; 4904 } 4905 positionCursor = true; 4906 } else { 4907 final int adjustedOffset = 4908 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4909 final boolean shrinking = isStartHandle() 4910 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4911 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4912 if (shrinking) { 4913 // User is shrinking the selection. 4914 if (currLine != mPrevLine) { 4915 // We're on a different line, so we'll snap to word boundaries. 4916 offset = isStartHandle() ? wordStart : wordEnd; 4917 if ((isStartHandle() && offset < initialOffset) 4918 || (!isStartHandle() && offset > initialOffset)) { 4919 final float adjustedX = getHorizontal(layout, offset); 4920 mTouchWordDelta = 4921 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4922 } else { 4923 mTouchWordDelta = 0.0f; 4924 } 4925 } else { 4926 offset = adjustedOffset; 4927 } 4928 positionCursor = true; 4929 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4930 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4931 // Handle has jumped to the word boundary, and the user is moving 4932 // their finger towards the handle, the delta should be updated. 4933 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4934 - getHorizontal(layout, mPreviousOffset); 4935 } 4936 } 4937 4938 if (positionCursor) { 4939 mPreviousLineTouched = currLine; 4940 positionAndAdjustForCrossingHandles(offset); 4941 } 4942 mPrevX = x; 4943 } 4944 4945 @Override 4946 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4947 super.positionAtCursorOffset(offset, forceUpdatePosition); 4948 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 4949 } 4950 4951 @Override 4952 public boolean onTouchEvent(MotionEvent event) { 4953 boolean superResult = super.onTouchEvent(event); 4954 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 4955 // Reset the touch word offset and x value when the user 4956 // re-engages the handle. 4957 mTouchWordDelta = 0.0f; 4958 mPrevX = UNSET_X_VALUE; 4959 } 4960 return superResult; 4961 } 4962 4963 private void positionAndAdjustForCrossingHandles(int offset) { 4964 final int anotherHandleOffset = 4965 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4966 if ((isStartHandle() && offset >= anotherHandleOffset) 4967 || (!isStartHandle() && offset <= anotherHandleOffset)) { 4968 mTouchWordDelta = 0.0f; 4969 final Layout layout = mTextView.getLayout(); 4970 if (layout != null && offset != anotherHandleOffset) { 4971 final float horiz = getHorizontal(layout, offset); 4972 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 4973 !isStartHandle()); 4974 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 4975 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 4976 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 4977 // This handle passes another one as it crossed a direction boundary. 4978 // Don't minimize the selection, but keep the handle at the run boundary. 4979 final int currentOffset = getCurrentCursorOffset(); 4980 final int offsetToGetRunRange = isStartHandle() 4981 ? currentOffset : Math.max(currentOffset - 1, 0); 4982 final long range = layout.getRunRange(offsetToGetRunRange); 4983 if (isStartHandle()) { 4984 offset = TextUtils.unpackRangeStartFromLong(range); 4985 } else { 4986 offset = TextUtils.unpackRangeEndFromLong(range); 4987 } 4988 positionAtCursorOffset(offset, false); 4989 return; 4990 } 4991 } 4992 // Handles can not cross and selection is at least one character. 4993 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 4994 } 4995 positionAtCursorOffset(offset, false); 4996 } 4997 4998 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 4999 mTextView.getLocationOnScreen(mTextViewLocation); 5000 boolean nearEdge; 5001 if (atRtl == isStartHandle()) { 5002 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5003 - mTextView.getPaddingRight(); 5004 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5005 } else { 5006 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5007 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5008 } 5009 return nearEdge; 5010 } 5011 5012 @Override 5013 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5014 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5015 return layout.isRtlCharAt(offsetToCheck); 5016 } 5017 5018 @Override 5019 public float getHorizontal(@NonNull Layout layout, int offset) { 5020 return getHorizontal(layout, offset, isStartHandle()); 5021 } 5022 5023 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5024 final int line = layout.getLineForOffset(offset); 5025 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5026 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5027 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5028 return (isRtlChar == isRtlParagraph) 5029 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5030 } 5031 5032 @Override 5033 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5034 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5035 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5036 if (!layout.isLevelBoundary(primaryOffset)) { 5037 return primaryOffset; 5038 } 5039 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5040 final int currentOffset = getCurrentCursorOffset(); 5041 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5042 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5043 if (primaryDiff < secondaryDiff) { 5044 return primaryOffset; 5045 } else if (primaryDiff > secondaryDiff) { 5046 return secondaryOffset; 5047 } else { 5048 final int offsetToCheck = isStartHandle() 5049 ? currentOffset : Math.max(currentOffset - 1, 0); 5050 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5051 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5052 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5053 } 5054 } 5055 } 5056 5057 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5058 final int trueLine = mTextView.getLineAtCoordinate(y); 5059 if (layout == null || prevLine > layout.getLineCount() 5060 || layout.getLineCount() <= 0 || prevLine < 0) { 5061 // Invalid parameters, just return whatever line is at y. 5062 return trueLine; 5063 } 5064 5065 if (Math.abs(trueLine - prevLine) >= 2) { 5066 // Only stick to lines if we're within a line of the previous selection. 5067 return trueLine; 5068 } 5069 5070 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5071 final int lineCount = layout.getLineCount(); 5072 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5073 5074 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5075 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5076 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5077 5078 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5079 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5080 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5081 5082 // Determine if we've moved lines based on y position and previous line. 5083 int currLine; 5084 if (y <= yTopBound) { 5085 currLine = Math.max(prevLine - 1, 0); 5086 } else if (y >= yBottomBound) { 5087 currLine = Math.min(prevLine + 1, lineCount - 1); 5088 } else { 5089 currLine = prevLine; 5090 } 5091 return currLine; 5092 } 5093 5094 /** 5095 * A CursorController instance can be used to control a cursor in the text. 5096 */ 5097 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5098 /** 5099 * Makes the cursor controller visible on screen. 5100 * See also {@link #hide()}. 5101 */ 5102 public void show(); 5103 5104 /** 5105 * Hide the cursor controller from screen. 5106 * See also {@link #show()}. 5107 */ 5108 public void hide(); 5109 5110 /** 5111 * Called when the view is detached from window. Perform house keeping task, such as 5112 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5113 * preventing the activity from being recycled. 5114 */ 5115 public void onDetached(); 5116 5117 public boolean isCursorBeingModified(); 5118 5119 public boolean isActive(); 5120 } 5121 5122 private class InsertionPointCursorController implements CursorController { 5123 private InsertionHandleView mHandle; 5124 5125 public void show() { 5126 getHandle().show(); 5127 5128 if (mSelectionModifierCursorController != null) { 5129 mSelectionModifierCursorController.hide(); 5130 } 5131 } 5132 5133 public void hide() { 5134 if (mHandle != null) { 5135 mHandle.hide(); 5136 } 5137 } 5138 5139 public void onTouchModeChanged(boolean isInTouchMode) { 5140 if (!isInTouchMode) { 5141 hide(); 5142 } 5143 } 5144 5145 private InsertionHandleView getHandle() { 5146 if (mSelectHandleCenter == null) { 5147 mSelectHandleCenter = mTextView.getContext().getDrawable( 5148 mTextView.mTextSelectHandleRes); 5149 } 5150 if (mHandle == null) { 5151 mHandle = new InsertionHandleView(mSelectHandleCenter); 5152 } 5153 return mHandle; 5154 } 5155 5156 @Override 5157 public void onDetached() { 5158 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5159 observer.removeOnTouchModeChangeListener(this); 5160 5161 if (mHandle != null) mHandle.onDetached(); 5162 } 5163 5164 @Override 5165 public boolean isCursorBeingModified() { 5166 return mHandle != null && mHandle.isDragging(); 5167 } 5168 5169 @Override 5170 public boolean isActive() { 5171 return mHandle != null && mHandle.isShowing(); 5172 } 5173 5174 public void invalidateHandle() { 5175 if (mHandle != null) { 5176 mHandle.invalidate(); 5177 } 5178 } 5179 } 5180 5181 class SelectionModifierCursorController implements CursorController { 5182 // The cursor controller handles, lazily created when shown. 5183 private SelectionHandleView mStartHandle; 5184 private SelectionHandleView mEndHandle; 5185 // The offsets of that last touch down event. Remembered to start selection there. 5186 private int mMinTouchOffset, mMaxTouchOffset; 5187 5188 private float mDownPositionX, mDownPositionY; 5189 private boolean mGestureStayedInTapRegion; 5190 5191 // Where the user first starts the drag motion. 5192 private int mStartOffset = -1; 5193 5194 private boolean mHaventMovedEnoughToStartDrag; 5195 // The line that a selection happened most recently with the drag accelerator. 5196 private int mLineSelectionIsOn = -1; 5197 // Whether the drag accelerator has selected past the initial line. 5198 private boolean mSwitchedLines = false; 5199 5200 // Indicates the drag accelerator mode that the user is currently using. 5201 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5202 // Drag accelerator is inactive. 5203 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5204 // Character based selection by dragging. Only for mouse. 5205 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5206 // Word based selection by dragging. Enabled after long pressing or double tapping. 5207 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5208 // Paragraph based selection by dragging. Enabled after mouse triple click. 5209 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5210 5211 SelectionModifierCursorController() { 5212 resetTouchOffsets(); 5213 } 5214 5215 public void show() { 5216 if (mTextView.isInBatchEditMode()) { 5217 return; 5218 } 5219 initDrawables(); 5220 initHandles(); 5221 } 5222 5223 private void initDrawables() { 5224 if (mSelectHandleLeft == null) { 5225 mSelectHandleLeft = mTextView.getContext().getDrawable( 5226 mTextView.mTextSelectHandleLeftRes); 5227 } 5228 if (mSelectHandleRight == null) { 5229 mSelectHandleRight = mTextView.getContext().getDrawable( 5230 mTextView.mTextSelectHandleRightRes); 5231 } 5232 } 5233 5234 private void initHandles() { 5235 // Lazy object creation has to be done before updatePosition() is called. 5236 if (mStartHandle == null) { 5237 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5238 com.android.internal.R.id.selection_start_handle, 5239 HANDLE_TYPE_SELECTION_START); 5240 } 5241 if (mEndHandle == null) { 5242 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5243 com.android.internal.R.id.selection_end_handle, 5244 HANDLE_TYPE_SELECTION_END); 5245 } 5246 5247 mStartHandle.show(); 5248 mEndHandle.show(); 5249 5250 hideInsertionPointCursorController(); 5251 } 5252 5253 public void hide() { 5254 if (mStartHandle != null) mStartHandle.hide(); 5255 if (mEndHandle != null) mEndHandle.hide(); 5256 } 5257 5258 public void enterDrag(int dragAcceleratorMode) { 5259 // Just need to init the handles / hide insertion cursor. 5260 show(); 5261 mDragAcceleratorMode = dragAcceleratorMode; 5262 // Start location of selection. 5263 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5264 mLastDownPositionY); 5265 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5266 // Don't show the handles until user has lifted finger. 5267 hide(); 5268 5269 // This stops scrolling parents from intercepting the touch event, allowing 5270 // the user to continue dragging across the screen to select text; TextView will 5271 // scroll as necessary. 5272 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5273 mTextView.cancelLongPress(); 5274 } 5275 5276 public void onTouchEvent(MotionEvent event) { 5277 // This is done even when the View does not have focus, so that long presses can start 5278 // selection and tap can move cursor from this tap position. 5279 final float eventX = event.getX(); 5280 final float eventY = event.getY(); 5281 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5282 switch (event.getActionMasked()) { 5283 case MotionEvent.ACTION_DOWN: 5284 if (extractedTextModeWillBeStarted()) { 5285 // Prevent duplicating the selection handles until the mode starts. 5286 hide(); 5287 } else { 5288 // Remember finger down position, to be able to start selection from there. 5289 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5290 eventX, eventY); 5291 5292 // Double tap detection 5293 if (mGestureStayedInTapRegion) { 5294 if (mTapState == TAP_STATE_DOUBLE_TAP 5295 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5296 final float deltaX = eventX - mDownPositionX; 5297 final float deltaY = eventY - mDownPositionY; 5298 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5299 5300 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5301 mTextView.getContext()); 5302 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5303 boolean stayedInArea = 5304 distanceSquared < doubleTapSlop * doubleTapSlop; 5305 5306 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5307 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5308 selectCurrentWordAndStartDrag(); 5309 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5310 selectCurrentParagraphAndStartDrag(); 5311 } 5312 mDiscardNextActionUp = true; 5313 } 5314 } 5315 } 5316 5317 mDownPositionX = eventX; 5318 mDownPositionY = eventY; 5319 mGestureStayedInTapRegion = true; 5320 mHaventMovedEnoughToStartDrag = true; 5321 } 5322 break; 5323 5324 case MotionEvent.ACTION_POINTER_DOWN: 5325 case MotionEvent.ACTION_POINTER_UP: 5326 // Handle multi-point gestures. Keep min and max offset positions. 5327 // Only activated for devices that correctly handle multi-touch. 5328 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5329 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5330 updateMinAndMaxOffsets(event); 5331 } 5332 break; 5333 5334 case MotionEvent.ACTION_MOVE: 5335 final ViewConfiguration viewConfig = ViewConfiguration.get( 5336 mTextView.getContext()); 5337 final int touchSlop = viewConfig.getScaledTouchSlop(); 5338 5339 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5340 final float deltaX = eventX - mDownPositionX; 5341 final float deltaY = eventY - mDownPositionY; 5342 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5343 5344 if (mGestureStayedInTapRegion) { 5345 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5346 mGestureStayedInTapRegion = 5347 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5348 } 5349 if (mHaventMovedEnoughToStartDrag) { 5350 // We don't start dragging until the user has moved enough. 5351 mHaventMovedEnoughToStartDrag = 5352 distanceSquared <= touchSlop * touchSlop; 5353 } 5354 } 5355 5356 if (isMouse && !isDragAcceleratorActive()) { 5357 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5358 if (mTextView.hasSelection() 5359 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5360 && offset >= mTextView.getSelectionStart() 5361 && offset <= mTextView.getSelectionEnd()) { 5362 startDragAndDrop(); 5363 break; 5364 } 5365 5366 if (mStartOffset != offset) { 5367 // Start character based drag accelerator. 5368 stopTextActionMode(); 5369 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5370 mDiscardNextActionUp = true; 5371 mHaventMovedEnoughToStartDrag = false; 5372 } 5373 } 5374 5375 if (mStartHandle != null && mStartHandle.isShowing()) { 5376 // Don't do the drag if the handles are showing already. 5377 break; 5378 } 5379 5380 updateSelection(event); 5381 break; 5382 5383 case MotionEvent.ACTION_UP: 5384 if (!isDragAcceleratorActive()) { 5385 break; 5386 } 5387 updateSelection(event); 5388 5389 // No longer dragging to select text, let the parent intercept events. 5390 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5391 5392 // No longer the first dragging motion, reset. 5393 resetDragAcceleratorState(); 5394 5395 if (mTextView.hasSelection()) { 5396 // Do not invoke the text assistant if this was a drag selection. 5397 if (mHaventMovedEnoughToStartDrag) { 5398 startSelectionActionModeAsync(); 5399 } else { 5400 startSelectionActionMode(); 5401 } 5402 5403 } 5404 break; 5405 } 5406 } 5407 5408 private void updateSelection(MotionEvent event) { 5409 if (mTextView.getLayout() != null) { 5410 switch (mDragAcceleratorMode) { 5411 case DRAG_ACCELERATOR_MODE_CHARACTER: 5412 updateCharacterBasedSelection(event); 5413 break; 5414 case DRAG_ACCELERATOR_MODE_WORD: 5415 updateWordBasedSelection(event); 5416 break; 5417 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5418 updateParagraphBasedSelection(event); 5419 break; 5420 } 5421 } 5422 } 5423 5424 /** 5425 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5426 * 5427 * @return true if the drag was started. 5428 */ 5429 private boolean selectCurrentParagraphAndStartDrag() { 5430 if (mInsertionActionModeRunnable != null) { 5431 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5432 } 5433 stopTextActionMode(); 5434 if (!selectCurrentParagraph()) { 5435 return false; 5436 } 5437 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5438 return true; 5439 } 5440 5441 private void updateCharacterBasedSelection(MotionEvent event) { 5442 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5443 Selection.setSelection((Spannable) mTextView.getText(), mStartOffset, offset); 5444 } 5445 5446 private void updateWordBasedSelection(MotionEvent event) { 5447 if (mHaventMovedEnoughToStartDrag) { 5448 return; 5449 } 5450 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5451 final ViewConfiguration viewConfig = ViewConfiguration.get( 5452 mTextView.getContext()); 5453 final float eventX = event.getX(); 5454 final float eventY = event.getY(); 5455 final int currLine; 5456 if (isMouse) { 5457 // No need to offset the y coordinate for mouse input. 5458 currLine = mTextView.getLineAtCoordinate(eventY); 5459 } else { 5460 float y = eventY; 5461 if (mSwitchedLines) { 5462 // Offset the finger by the same vertical offset as the handles. 5463 // This improves visibility of the content being selected by 5464 // shifting the finger below the content, this is applied once 5465 // the user has switched lines. 5466 final int touchSlop = viewConfig.getScaledTouchSlop(); 5467 final float fingerOffset = (mStartHandle != null) 5468 ? mStartHandle.getIdealVerticalOffset() 5469 : touchSlop; 5470 y = eventY - fingerOffset; 5471 } 5472 5473 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5474 y); 5475 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5476 // Break early here, we want to offset the finger position from 5477 // the selection highlight, once the user moved their finger 5478 // to a different line we should apply the offset and *not* switch 5479 // lines until recomputing the position with the finger offset. 5480 mSwitchedLines = true; 5481 return; 5482 } 5483 } 5484 5485 int startOffset; 5486 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5487 // Snap to word boundaries. 5488 if (mStartOffset < offset) { 5489 // Expanding with end handle. 5490 offset = getWordEnd(offset); 5491 startOffset = getWordStart(mStartOffset); 5492 } else { 5493 // Expanding with start handle. 5494 offset = getWordStart(offset); 5495 startOffset = getWordEnd(mStartOffset); 5496 if (startOffset == offset) { 5497 offset = getNextCursorOffset(offset, false); 5498 } 5499 } 5500 mLineSelectionIsOn = currLine; 5501 Selection.setSelection((Spannable) mTextView.getText(), startOffset, offset); 5502 } 5503 5504 private void updateParagraphBasedSelection(MotionEvent event) { 5505 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5506 5507 final int start = Math.min(offset, mStartOffset); 5508 final int end = Math.max(offset, mStartOffset); 5509 final long paragraphsRange = getParagraphsRange(start, end); 5510 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5511 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5512 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5513 } 5514 5515 /** 5516 * @param event 5517 */ 5518 private void updateMinAndMaxOffsets(MotionEvent event) { 5519 int pointerCount = event.getPointerCount(); 5520 for (int index = 0; index < pointerCount; index++) { 5521 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5522 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5523 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5524 } 5525 } 5526 5527 public int getMinTouchOffset() { 5528 return mMinTouchOffset; 5529 } 5530 5531 public int getMaxTouchOffset() { 5532 return mMaxTouchOffset; 5533 } 5534 5535 public void resetTouchOffsets() { 5536 mMinTouchOffset = mMaxTouchOffset = -1; 5537 resetDragAcceleratorState(); 5538 } 5539 5540 private void resetDragAcceleratorState() { 5541 mStartOffset = -1; 5542 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5543 mSwitchedLines = false; 5544 final int selectionStart = mTextView.getSelectionStart(); 5545 final int selectionEnd = mTextView.getSelectionEnd(); 5546 if (selectionStart > selectionEnd) { 5547 Selection.setSelection((Spannable) mTextView.getText(), 5548 selectionEnd, selectionStart); 5549 } 5550 } 5551 5552 /** 5553 * @return true iff this controller is currently used to move the selection start. 5554 */ 5555 public boolean isSelectionStartDragged() { 5556 return mStartHandle != null && mStartHandle.isDragging(); 5557 } 5558 5559 @Override 5560 public boolean isCursorBeingModified() { 5561 return isDragAcceleratorActive() || isSelectionStartDragged() 5562 || (mEndHandle != null && mEndHandle.isDragging()); 5563 } 5564 5565 /** 5566 * @return true if the user is selecting text using the drag accelerator. 5567 */ 5568 public boolean isDragAcceleratorActive() { 5569 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5570 } 5571 5572 public void onTouchModeChanged(boolean isInTouchMode) { 5573 if (!isInTouchMode) { 5574 hide(); 5575 } 5576 } 5577 5578 @Override 5579 public void onDetached() { 5580 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5581 observer.removeOnTouchModeChangeListener(this); 5582 5583 if (mStartHandle != null) mStartHandle.onDetached(); 5584 if (mEndHandle != null) mEndHandle.onDetached(); 5585 } 5586 5587 @Override 5588 public boolean isActive() { 5589 return mStartHandle != null && mStartHandle.isShowing(); 5590 } 5591 5592 public void invalidateHandles() { 5593 if (mStartHandle != null) { 5594 mStartHandle.invalidate(); 5595 } 5596 if (mEndHandle != null) { 5597 mEndHandle.invalidate(); 5598 } 5599 } 5600 } 5601 5602 private class CorrectionHighlighter { 5603 private final Path mPath = new Path(); 5604 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5605 private int mStart, mEnd; 5606 private long mFadingStartTime; 5607 private RectF mTempRectF; 5608 private static final int FADE_OUT_DURATION = 400; 5609 5610 public CorrectionHighlighter() { 5611 mPaint.setCompatibilityScaling( 5612 mTextView.getResources().getCompatibilityInfo().applicationScale); 5613 mPaint.setStyle(Paint.Style.FILL); 5614 } 5615 5616 public void highlight(CorrectionInfo info) { 5617 mStart = info.getOffset(); 5618 mEnd = mStart + info.getNewText().length(); 5619 mFadingStartTime = SystemClock.uptimeMillis(); 5620 5621 if (mStart < 0 || mEnd < 0) { 5622 stopAnimation(); 5623 } 5624 } 5625 5626 public void draw(Canvas canvas, int cursorOffsetVertical) { 5627 if (updatePath() && updatePaint()) { 5628 if (cursorOffsetVertical != 0) { 5629 canvas.translate(0, cursorOffsetVertical); 5630 } 5631 5632 canvas.drawPath(mPath, mPaint); 5633 5634 if (cursorOffsetVertical != 0) { 5635 canvas.translate(0, -cursorOffsetVertical); 5636 } 5637 invalidate(true); // TODO invalidate cursor region only 5638 } else { 5639 stopAnimation(); 5640 invalidate(false); // TODO invalidate cursor region only 5641 } 5642 } 5643 5644 private boolean updatePaint() { 5645 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5646 if (duration > FADE_OUT_DURATION) return false; 5647 5648 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5649 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5650 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5651 + ((int) (highlightColorAlpha * coef) << 24); 5652 mPaint.setColor(color); 5653 return true; 5654 } 5655 5656 private boolean updatePath() { 5657 final Layout layout = mTextView.getLayout(); 5658 if (layout == null) return false; 5659 5660 // Update in case text is edited while the animation is run 5661 final int length = mTextView.getText().length(); 5662 int start = Math.min(length, mStart); 5663 int end = Math.min(length, mEnd); 5664 5665 mPath.reset(); 5666 layout.getSelectionPath(start, end, mPath); 5667 return true; 5668 } 5669 5670 private void invalidate(boolean delayed) { 5671 if (mTextView.getLayout() == null) return; 5672 5673 if (mTempRectF == null) mTempRectF = new RectF(); 5674 mPath.computeBounds(mTempRectF, false); 5675 5676 int left = mTextView.getCompoundPaddingLeft(); 5677 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5678 5679 if (delayed) { 5680 mTextView.postInvalidateOnAnimation( 5681 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5682 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5683 } else { 5684 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5685 (int) mTempRectF.right, (int) mTempRectF.bottom); 5686 } 5687 } 5688 5689 private void stopAnimation() { 5690 Editor.this.mCorrectionHighlighter = null; 5691 } 5692 } 5693 5694 private static class ErrorPopup extends PopupWindow { 5695 private boolean mAbove = false; 5696 private final TextView mView; 5697 private int mPopupInlineErrorBackgroundId = 0; 5698 private int mPopupInlineErrorAboveBackgroundId = 0; 5699 5700 ErrorPopup(TextView v, int width, int height) { 5701 super(v, width, height); 5702 mView = v; 5703 // Make sure the TextView has a background set as it will be used the first time it is 5704 // shown and positioned. Initialized with below background, which should have 5705 // dimensions identical to the above version for this to work (and is more likely). 5706 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5707 com.android.internal.R.styleable.Theme_errorMessageBackground); 5708 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5709 } 5710 5711 void fixDirection(boolean above) { 5712 mAbove = above; 5713 5714 if (above) { 5715 mPopupInlineErrorAboveBackgroundId = 5716 getResourceId(mPopupInlineErrorAboveBackgroundId, 5717 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5718 } else { 5719 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5720 com.android.internal.R.styleable.Theme_errorMessageBackground); 5721 } 5722 5723 mView.setBackgroundResource( 5724 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5725 } 5726 5727 private int getResourceId(int currentId, int index) { 5728 if (currentId == 0) { 5729 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5730 R.styleable.Theme); 5731 currentId = styledAttributes.getResourceId(index, 0); 5732 styledAttributes.recycle(); 5733 } 5734 return currentId; 5735 } 5736 5737 @Override 5738 public void update(int x, int y, int w, int h, boolean force) { 5739 super.update(x, y, w, h, force); 5740 5741 boolean above = isAboveAnchor(); 5742 if (above != mAbove) { 5743 fixDirection(above); 5744 } 5745 } 5746 } 5747 5748 static class InputContentType { 5749 int imeOptions = EditorInfo.IME_NULL; 5750 String privateImeOptions; 5751 CharSequence imeActionLabel; 5752 int imeActionId; 5753 Bundle extras; 5754 OnEditorActionListener onEditorActionListener; 5755 boolean enterDown; 5756 LocaleList imeHintLocales; 5757 } 5758 5759 static class InputMethodState { 5760 ExtractedTextRequest mExtractedTextRequest; 5761 final ExtractedText mExtractedText = new ExtractedText(); 5762 int mBatchEditNesting; 5763 boolean mCursorChanged; 5764 boolean mSelectionModeChanged; 5765 boolean mContentChanged; 5766 int mChangedStart, mChangedEnd, mChangedDelta; 5767 } 5768 5769 /** 5770 * @return True iff (start, end) is a valid range within the text. 5771 */ 5772 private static boolean isValidRange(CharSequence text, int start, int end) { 5773 return 0 <= start && start <= end && end <= text.length(); 5774 } 5775 5776 @VisibleForTesting 5777 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5778 return mSuggestionsPopupWindow; 5779 } 5780 5781 /** 5782 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5783 * text being typed (and hence always returns null from the filter() method). 5784 * 5785 * TODO: Make this span aware. 5786 */ 5787 public static class UndoInputFilter implements InputFilter { 5788 private final Editor mEditor; 5789 5790 // Whether the current filter pass is directly caused by an end-user text edit. 5791 private boolean mIsUserEdit; 5792 5793 // Whether the text field is handling an IME composition. Must be parceled in case the user 5794 // rotates the screen during composition. 5795 private boolean mHasComposition; 5796 5797 // Whether the user is expanding or shortening the text 5798 private boolean mExpanding; 5799 5800 // Whether the previous edit operation was in the current batch edit. 5801 private boolean mPreviousOperationWasInSameBatchEdit; 5802 5803 public UndoInputFilter(Editor editor) { 5804 mEditor = editor; 5805 } 5806 5807 public void saveInstanceState(Parcel parcel) { 5808 parcel.writeInt(mIsUserEdit ? 1 : 0); 5809 parcel.writeInt(mHasComposition ? 1 : 0); 5810 parcel.writeInt(mExpanding ? 1 : 0); 5811 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5812 } 5813 5814 public void restoreInstanceState(Parcel parcel) { 5815 mIsUserEdit = parcel.readInt() != 0; 5816 mHasComposition = parcel.readInt() != 0; 5817 mExpanding = parcel.readInt() != 0; 5818 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5819 } 5820 5821 /** 5822 * Signals that a user-triggered edit is starting. 5823 */ 5824 public void beginBatchEdit() { 5825 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5826 mIsUserEdit = true; 5827 } 5828 5829 public void endBatchEdit() { 5830 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5831 mIsUserEdit = false; 5832 mPreviousOperationWasInSameBatchEdit = false; 5833 } 5834 5835 @Override 5836 public CharSequence filter(CharSequence source, int start, int end, 5837 Spanned dest, int dstart, int dend) { 5838 if (DEBUG_UNDO) { 5839 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 5840 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5841 } 5842 5843 // Check to see if this edit should be tracked for undo. 5844 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5845 return null; 5846 } 5847 5848 final boolean hadComposition = mHasComposition; 5849 mHasComposition = isComposition(source); 5850 final boolean wasExpanding = mExpanding; 5851 boolean shouldCreateSeparateState = false; 5852 if ((end - start) != (dend - dstart)) { 5853 mExpanding = (end - start) > (dend - dstart); 5854 if (hadComposition && mExpanding != wasExpanding) { 5855 shouldCreateSeparateState = true; 5856 } 5857 } 5858 5859 // Handle edit. 5860 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5861 return null; 5862 } 5863 5864 void freezeLastEdit() { 5865 mEditor.mUndoManager.beginUpdate("Edit text"); 5866 EditOperation lastEdit = getLastEdit(); 5867 if (lastEdit != null) { 5868 lastEdit.mFrozen = true; 5869 } 5870 mEditor.mUndoManager.endUpdate(); 5871 } 5872 5873 @Retention(RetentionPolicy.SOURCE) 5874 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5875 private @interface MergeMode {} 5876 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5877 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5878 /** Use {@link EditOperation#mergeWith} to merge */ 5879 private static final int MERGE_EDIT_MODE_NORMAL = 2; 5880 5881 private void handleEdit(CharSequence source, int start, int end, 5882 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5883 // An application may install a TextWatcher to provide additional modifications after 5884 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5885 // string). This results in multiple filter() calls for what the user considers to be 5886 // a single operation. Always undo the whole set of changes in one step. 5887 @MergeMode 5888 final int mergeMode; 5889 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5890 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5891 } else if (shouldCreateSeparateState) { 5892 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5893 } else { 5894 mergeMode = MERGE_EDIT_MODE_NORMAL; 5895 } 5896 // Build a new operation with all the information from this edit. 5897 String newText = TextUtils.substring(source, start, end); 5898 String oldText = TextUtils.substring(dest, dstart, dend); 5899 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5900 mHasComposition); 5901 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5902 return; 5903 } 5904 recordEdit(edit, mergeMode); 5905 } 5906 5907 private EditOperation getLastEdit() { 5908 final UndoManager um = mEditor.mUndoManager; 5909 return um.getLastOperation( 5910 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5911 } 5912 /** 5913 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5914 * If forceMerge is true then the new edit is always merged. 5915 */ 5916 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5917 // Fetch the last edit operation and attempt to merge in the new edit. 5918 final UndoManager um = mEditor.mUndoManager; 5919 um.beginUpdate("Edit text"); 5920 EditOperation lastEdit = getLastEdit(); 5921 if (lastEdit == null) { 5922 // Add this as the first edit. 5923 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5924 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5925 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5926 // Forced merges take priority because they could be the result of a non-user-edit 5927 // change and this case should not create a new undo operation. 5928 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5929 lastEdit.forceMergeWith(edit); 5930 } else if (!mIsUserEdit) { 5931 // An application directly modified the Editable outside of a text edit. Treat this 5932 // as a new change and don't attempt to merge. 5933 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5934 um.commitState(mEditor.mUndoOwner); 5935 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5936 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 5937 // Merge succeeded, nothing else to do. 5938 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5939 } else { 5940 // Could not merge with the last edit, so commit the last edit and add this edit. 5941 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5942 um.commitState(mEditor.mUndoOwner); 5943 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5944 } 5945 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 5946 um.endUpdate(); 5947 } 5948 5949 private boolean canUndoEdit(CharSequence source, int start, int end, 5950 Spanned dest, int dstart, int dend) { 5951 if (!mEditor.mAllowUndo) { 5952 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5953 return false; 5954 } 5955 5956 if (mEditor.mUndoManager.isInUndo()) { 5957 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5958 return false; 5959 } 5960 5961 // Text filters run before input operations are applied. However, some input operations 5962 // are invalid and will throw exceptions when applied. This is common in tests. Don't 5963 // attempt to undo invalid operations. 5964 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 5965 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 5966 return false; 5967 } 5968 5969 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 5970 // on an input field. Skip no-op changes. 5971 if (start == end && dstart == dend) { 5972 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 5973 return false; 5974 } 5975 5976 return true; 5977 } 5978 5979 private static boolean isComposition(CharSequence source) { 5980 if (!(source instanceof Spannable)) { 5981 return false; 5982 } 5983 // This is a composition edit if the source has a non-zero-length composing span. 5984 Spannable text = (Spannable) source; 5985 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 5986 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 5987 return composeBegin < composeEnd; 5988 } 5989 5990 private boolean isInTextWatcher() { 5991 CharSequence text = mEditor.mTextView.getText(); 5992 return (text instanceof SpannableStringBuilder) 5993 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 5994 } 5995 } 5996 5997 /** 5998 * An operation to undo a single "edit" to a text view. 5999 */ 6000 public static class EditOperation extends UndoOperation<Editor> { 6001 private static final int TYPE_INSERT = 0; 6002 private static final int TYPE_DELETE = 1; 6003 private static final int TYPE_REPLACE = 2; 6004 6005 private int mType; 6006 private String mOldText; 6007 private String mNewText; 6008 private int mStart; 6009 6010 private int mOldCursorPos; 6011 private int mNewCursorPos; 6012 private boolean mFrozen; 6013 private boolean mIsComposition; 6014 6015 /** 6016 * Constructs an edit operation from a text input operation on editor that replaces the 6017 * oldText starting at dstart with newText. 6018 */ 6019 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6020 boolean isComposition) { 6021 super(editor.mUndoOwner); 6022 mOldText = oldText; 6023 mNewText = newText; 6024 6025 // Determine the type of the edit. 6026 if (mNewText.length() > 0 && mOldText.length() == 0) { 6027 mType = TYPE_INSERT; 6028 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6029 mType = TYPE_DELETE; 6030 } else { 6031 mType = TYPE_REPLACE; 6032 } 6033 6034 mStart = dstart; 6035 // Store cursor data. 6036 mOldCursorPos = editor.mTextView.getSelectionStart(); 6037 mNewCursorPos = dstart + mNewText.length(); 6038 mIsComposition = isComposition; 6039 } 6040 6041 public EditOperation(Parcel src, ClassLoader loader) { 6042 super(src, loader); 6043 mType = src.readInt(); 6044 mOldText = src.readString(); 6045 mNewText = src.readString(); 6046 mStart = src.readInt(); 6047 mOldCursorPos = src.readInt(); 6048 mNewCursorPos = src.readInt(); 6049 mFrozen = src.readInt() == 1; 6050 mIsComposition = src.readInt() == 1; 6051 } 6052 6053 @Override 6054 public void writeToParcel(Parcel dest, int flags) { 6055 dest.writeInt(mType); 6056 dest.writeString(mOldText); 6057 dest.writeString(mNewText); 6058 dest.writeInt(mStart); 6059 dest.writeInt(mOldCursorPos); 6060 dest.writeInt(mNewCursorPos); 6061 dest.writeInt(mFrozen ? 1 : 0); 6062 dest.writeInt(mIsComposition ? 1 : 0); 6063 } 6064 6065 private int getNewTextEnd() { 6066 return mStart + mNewText.length(); 6067 } 6068 6069 private int getOldTextEnd() { 6070 return mStart + mOldText.length(); 6071 } 6072 6073 @Override 6074 public void commit() { 6075 } 6076 6077 @Override 6078 public void undo() { 6079 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6080 // Remove the new text and insert the old. 6081 Editor editor = getOwnerData(); 6082 Editable text = (Editable) editor.mTextView.getText(); 6083 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6084 } 6085 6086 @Override 6087 public void redo() { 6088 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6089 // Remove the old text and insert the new. 6090 Editor editor = getOwnerData(); 6091 Editable text = (Editable) editor.mTextView.getText(); 6092 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6093 } 6094 6095 /** 6096 * Attempts to merge this existing operation with a new edit. 6097 * @param edit The new edit operation. 6098 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6099 * object unchanged. 6100 */ 6101 private boolean mergeWith(EditOperation edit) { 6102 if (DEBUG_UNDO) { 6103 Log.d(TAG, "mergeWith old " + this); 6104 Log.d(TAG, "mergeWith new " + edit); 6105 } 6106 6107 if (mFrozen) { 6108 return false; 6109 } 6110 6111 switch (mType) { 6112 case TYPE_INSERT: 6113 return mergeInsertWith(edit); 6114 case TYPE_DELETE: 6115 return mergeDeleteWith(edit); 6116 case TYPE_REPLACE: 6117 return mergeReplaceWith(edit); 6118 default: 6119 return false; 6120 } 6121 } 6122 6123 private boolean mergeInsertWith(EditOperation edit) { 6124 if (edit.mType == TYPE_INSERT) { 6125 // Merge insertions that are contiguous even when it's frozen. 6126 if (getNewTextEnd() != edit.mStart) { 6127 return false; 6128 } 6129 mNewText += edit.mNewText; 6130 mNewCursorPos = edit.mNewCursorPos; 6131 mFrozen = edit.mFrozen; 6132 mIsComposition = edit.mIsComposition; 6133 return true; 6134 } 6135 if (mIsComposition && edit.mType == TYPE_REPLACE 6136 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6137 // Merge insertion with replace as they can be single insertion. 6138 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6139 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6140 mNewCursorPos = edit.mNewCursorPos; 6141 mIsComposition = edit.mIsComposition; 6142 return true; 6143 } 6144 return false; 6145 } 6146 6147 // TODO: Support forward delete. 6148 private boolean mergeDeleteWith(EditOperation edit) { 6149 // Only merge continuous deletes. 6150 if (edit.mType != TYPE_DELETE) { 6151 return false; 6152 } 6153 // Only merge deletions that are contiguous. 6154 if (mStart != edit.getOldTextEnd()) { 6155 return false; 6156 } 6157 mStart = edit.mStart; 6158 mOldText = edit.mOldText + mOldText; 6159 mNewCursorPos = edit.mNewCursorPos; 6160 mIsComposition = edit.mIsComposition; 6161 return true; 6162 } 6163 6164 private boolean mergeReplaceWith(EditOperation edit) { 6165 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6166 // Merge with adjacent insert. 6167 mNewText += edit.mNewText; 6168 mNewCursorPos = edit.mNewCursorPos; 6169 return true; 6170 } 6171 if (!mIsComposition) { 6172 return false; 6173 } 6174 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6175 && getNewTextEnd() >= edit.getOldTextEnd()) { 6176 // Merge with delete as they can be single operation. 6177 mNewText = mNewText.substring(0, edit.mStart - mStart) 6178 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6179 if (mNewText.isEmpty()) { 6180 mType = TYPE_DELETE; 6181 } 6182 mNewCursorPos = edit.mNewCursorPos; 6183 mIsComposition = edit.mIsComposition; 6184 return true; 6185 } 6186 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6187 && TextUtils.equals(mNewText, edit.mOldText)) { 6188 // Merge with the replace that replaces the same region. 6189 mNewText = edit.mNewText; 6190 mNewCursorPos = edit.mNewCursorPos; 6191 mIsComposition = edit.mIsComposition; 6192 return true; 6193 } 6194 return false; 6195 } 6196 6197 /** 6198 * Forcibly creates a single merged edit operation by simulating the entire text 6199 * contents being replaced. 6200 */ 6201 public void forceMergeWith(EditOperation edit) { 6202 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6203 if (mergeWith(edit)) { 6204 return; 6205 } 6206 Editor editor = getOwnerData(); 6207 6208 // Copy the text of the current field. 6209 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6210 // but would require two parallel implementations of modifyText() because Editable and 6211 // StringBuilder do not share an interface for replace/delete/insert. 6212 Editable editable = (Editable) editor.mTextView.getText(); 6213 Editable originalText = new SpannableStringBuilder(editable.toString()); 6214 6215 // Roll back the last operation. 6216 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6217 6218 // Clone the text again and apply the new operation. 6219 Editable finalText = new SpannableStringBuilder(editable.toString()); 6220 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6221 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6222 6223 // Convert this operation into a replace operation. 6224 mType = TYPE_REPLACE; 6225 mNewText = finalText.toString(); 6226 mOldText = originalText.toString(); 6227 mStart = 0; 6228 mNewCursorPos = edit.mNewCursorPos; 6229 mIsComposition = edit.mIsComposition; 6230 // mOldCursorPos is unchanged. 6231 } 6232 6233 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6234 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6235 // Apply the edit if it is still valid. 6236 if (isValidRange(text, deleteFrom, deleteTo) 6237 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6238 if (deleteFrom != deleteTo) { 6239 text.delete(deleteFrom, deleteTo); 6240 } 6241 if (newText.length() != 0) { 6242 text.insert(newTextInsertAt, newText); 6243 } 6244 } 6245 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6246 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6247 // TODO: Select all the text that was undone. 6248 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6249 Selection.setSelection(text, newCursorPos); 6250 } 6251 } 6252 6253 private String getTypeString() { 6254 switch (mType) { 6255 case TYPE_INSERT: 6256 return "insert"; 6257 case TYPE_DELETE: 6258 return "delete"; 6259 case TYPE_REPLACE: 6260 return "replace"; 6261 default: 6262 return ""; 6263 } 6264 } 6265 6266 @Override 6267 public String toString() { 6268 return "[mType=" + getTypeString() + ", " 6269 + "mOldText=" + mOldText + ", " 6270 + "mNewText=" + mNewText + ", " 6271 + "mStart=" + mStart + ", " 6272 + "mOldCursorPos=" + mOldCursorPos + ", " 6273 + "mNewCursorPos=" + mNewCursorPos + ", " 6274 + "mFrozen=" + mFrozen + ", " 6275 + "mIsComposition=" + mIsComposition + "]"; 6276 } 6277 6278 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6279 new Parcelable.ClassLoaderCreator<EditOperation>() { 6280 @Override 6281 public EditOperation createFromParcel(Parcel in) { 6282 return new EditOperation(in, null); 6283 } 6284 6285 @Override 6286 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6287 return new EditOperation(in, loader); 6288 } 6289 6290 @Override 6291 public EditOperation[] newArray(int size) { 6292 return new EditOperation[size]; 6293 } 6294 }; 6295 } 6296 6297 /** 6298 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6299 * These allow external applications to plug into currently selected text. 6300 */ 6301 static final class ProcessTextIntentActionsHandler { 6302 6303 private final Editor mEditor; 6304 private final TextView mTextView; 6305 private final Context mContext; 6306 private final PackageManager mPackageManager; 6307 private final String mPackageName; 6308 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6309 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6310 new SparseArray<>(); 6311 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6312 6313 private ProcessTextIntentActionsHandler(Editor editor) { 6314 mEditor = Preconditions.checkNotNull(editor); 6315 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6316 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6317 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6318 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6319 } 6320 6321 /** 6322 * Adds "PROCESS_TEXT" menu items to the specified menu. 6323 */ 6324 public void onInitializeMenu(Menu menu) { 6325 final int size = mSupportedActivities.size(); 6326 loadSupportedActivities(); 6327 for (int i = 0; i < size; i++) { 6328 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6329 menu.add(Menu.NONE, Menu.NONE, 6330 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6331 getLabel(resolveInfo)) 6332 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6333 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6334 } 6335 } 6336 6337 /** 6338 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6339 * menu item. 6340 * 6341 * @return True if the action was performed, false otherwise. 6342 */ 6343 public boolean performMenuItemAction(MenuItem item) { 6344 return fireIntent(item.getIntent()); 6345 } 6346 6347 /** 6348 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6349 */ 6350 public void initializeAccessibilityActions() { 6351 mAccessibilityIntents.clear(); 6352 mAccessibilityActions.clear(); 6353 int i = 0; 6354 loadSupportedActivities(); 6355 for (ResolveInfo resolveInfo : mSupportedActivities) { 6356 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6357 mAccessibilityActions.put( 6358 actionId, 6359 new AccessibilityNodeInfo.AccessibilityAction( 6360 actionId, getLabel(resolveInfo))); 6361 mAccessibilityIntents.put( 6362 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6363 } 6364 } 6365 6366 /** 6367 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6368 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6369 * latest accessibility actions available for this call. 6370 */ 6371 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6372 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6373 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6374 } 6375 } 6376 6377 /** 6378 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6379 * accessibility action id. 6380 * 6381 * @return True if the action was performed, false otherwise. 6382 */ 6383 public boolean performAccessibilityAction(int actionId) { 6384 return fireIntent(mAccessibilityIntents.get(actionId)); 6385 } 6386 6387 private boolean fireIntent(Intent intent) { 6388 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6389 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 6390 mEditor.mPreserveSelection = true; 6391 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6392 return true; 6393 } 6394 return false; 6395 } 6396 6397 private void loadSupportedActivities() { 6398 mSupportedActivities.clear(); 6399 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6400 List<ResolveInfo> unfiltered = 6401 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6402 for (ResolveInfo info : unfiltered) { 6403 if (isSupportedActivity(info)) { 6404 mSupportedActivities.add(info); 6405 } 6406 } 6407 } 6408 6409 private boolean isSupportedActivity(ResolveInfo info) { 6410 return mPackageName.equals(info.activityInfo.packageName) 6411 || info.activityInfo.exported 6412 && (info.activityInfo.permission == null 6413 || mContext.checkSelfPermission(info.activityInfo.permission) 6414 == PackageManager.PERMISSION_GRANTED); 6415 } 6416 6417 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6418 return createProcessTextIntent() 6419 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6420 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6421 } 6422 6423 private Intent createProcessTextIntent() { 6424 return new Intent() 6425 .setAction(Intent.ACTION_PROCESS_TEXT) 6426 .setType("text/plain"); 6427 } 6428 6429 private CharSequence getLabel(ResolveInfo resolveInfo) { 6430 return resolveInfo.loadLabel(mPackageManager); 6431 } 6432 } 6433} 6434