Editor.java revision 1e2758256a391be23c537725f0a7785e4fb5b7d0
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.view.textclassifier.TextSelection; 110import android.widget.AdapterView.OnItemClickListener; 111import android.widget.TextView.Drawables; 112import android.widget.TextView.OnEditorActionListener; 113 114import com.android.internal.annotations.VisibleForTesting; 115import com.android.internal.logging.MetricsLogger; 116import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 117import com.android.internal.util.ArrayUtils; 118import com.android.internal.util.GrowingArrayUtils; 119import com.android.internal.util.Preconditions; 120import com.android.internal.widget.EditableInputConnection; 121 122import java.lang.annotation.Retention; 123import java.lang.annotation.RetentionPolicy; 124import java.text.BreakIterator; 125import java.util.ArrayList; 126import java.util.Arrays; 127import java.util.Comparator; 128import java.util.HashMap; 129import java.util.List; 130 131 132/** 133 * Helper class used by TextView to handle editable text views. 134 * 135 * @hide 136 */ 137public class Editor { 138 private static final String TAG = "Editor"; 139 private static final boolean DEBUG_UNDO = false; 140 141 static final int BLINK = 500; 142 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 143 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 144 private static final int UNSET_X_VALUE = -1; 145 private static final int UNSET_LINE = -1; 146 // Tag used when the Editor maintains its own separate UndoManager. 147 private static final String UNDO_OWNER_TAG = "Editor"; 148 149 // Ordering constants used to place the Action Mode or context menu items in their menu. 150 private static final int MENU_ITEM_ORDER_ASSIST = 1; 151 private static final int MENU_ITEM_ORDER_UNDO = 2; 152 private static final int MENU_ITEM_ORDER_REDO = 3; 153 private static final int MENU_ITEM_ORDER_SHARE = 4; 154 private static final int MENU_ITEM_ORDER_CUT = 5; 155 private static final int MENU_ITEM_ORDER_COPY = 6; 156 private static final int MENU_ITEM_ORDER_PASTE = 7; 157 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 8; 158 private static final int MENU_ITEM_ORDER_SELECT_ALL = 9; 159 private static final int MENU_ITEM_ORDER_REPLACE = 10; 160 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 11; 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 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 TextClassificationResult mTextClassificationResult; 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 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 invalidateActionMode(getTextClassifierInfo(false)); 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, true)); 1919 1920 if (mCursorCount == 2) { 1921 updateCursorPosition(1, middle, bottom, 1922 layout.getSecondaryHorizontal(offset, clamped, true)); 1923 } 1924 } 1925 1926 void refreshTextActionMode() { 1927 if (extractedTextModeWillBeStarted()) { 1928 mRestartActionModeOnNextRefresh = false; 1929 return; 1930 } 1931 final boolean hasSelection = mTextView.hasSelection(); 1932 final SelectionModifierCursorController selectionController = getSelectionController(); 1933 final InsertionPointCursorController insertionController = getInsertionController(); 1934 if ((selectionController != null && selectionController.isCursorBeingModified()) 1935 || (insertionController != null && insertionController.isCursorBeingModified())) { 1936 // ActionMode should be managed by the currently active cursor controller. 1937 mRestartActionModeOnNextRefresh = false; 1938 return; 1939 } 1940 if (hasSelection) { 1941 hideInsertionPointCursorController(); 1942 if (mTextActionMode == null) { 1943 if (mRestartActionModeOnNextRefresh) { 1944 // To avoid distraction, newly start action mode only when selection action 1945 // mode is being restarted. 1946 startSelectionActionMode(null); 1947 } 1948 } else if (selectionController == null || !selectionController.isActive()) { 1949 // Insertion action mode is active. Avoid dismissing the selection. 1950 stopTextActionModeWithPreservingSelection(); 1951 startSelectionActionMode(null); 1952 } else { 1953 mTextActionMode.invalidateContentRect(); 1954 } 1955 } else { 1956 // Insertion action mode is started only when insertion controller is explicitly 1957 // activated. 1958 if (insertionController == null || !insertionController.isActive()) { 1959 stopTextActionMode(); 1960 } else if (mTextActionMode != null) { 1961 mTextActionMode.invalidateContentRect(); 1962 } 1963 } 1964 mRestartActionModeOnNextRefresh = false; 1965 } 1966 1967 /** 1968 * Start an Insertion action mode. 1969 */ 1970 void startInsertionActionMode() { 1971 if (mInsertionActionModeRunnable != null) { 1972 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1973 } 1974 if (extractedTextModeWillBeStarted()) { 1975 return; 1976 } 1977 stopTextActionMode(); 1978 1979 ActionMode.Callback actionModeCallback = 1980 new TextActionModeCallback(false /* hasSelection */); 1981 mTextActionMode = mTextView.startActionMode( 1982 actionModeCallback, ActionMode.TYPE_FLOATING); 1983 if (mTextActionMode != null && getInsertionController() != null) { 1984 getInsertionController().show(); 1985 } 1986 } 1987 1988 /** 1989 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1990 * are shown if there is a selection. This should be used when the mode is started from a 1991 * non-touch event. 1992 * 1993 * @return true if the selection mode was actually started. 1994 */ 1995 boolean startSelectionActionMode(@Nullable TextClassificationResult textClassificationResult) { 1996 mTextClassificationResult = textClassificationResult; 1997 boolean selectionStarted = startSelectionActionModeInternal(); 1998 if (selectionStarted) { 1999 getSelectionController().show(); 2000 } 2001 mRestartActionModeOnNextRefresh = false; 2002 return selectionStarted; 2003 } 2004 2005 private boolean startSelectionActionModeWithTextAssistant() { 2006 return startSelectionActionMode(getTextClassifierInfo(true)); 2007 } 2008 2009 private void invalidateActionMode(TextClassificationResult textClassificationResult) { 2010 mTextClassificationResult = textClassificationResult; 2011 mTextActionMode.invalidate(); 2012 } 2013 2014 // TODO: Make this a non-blocking call. 2015 private TextClassificationResult getTextClassifierInfo(boolean updateSelection) { 2016 // TODO: Trim the text so that only text necessary to provide context of the selected 2017 // text is sent to the assistant. 2018 final int trimStartIndex = 0; 2019 final int trimEndIndex = mTextView.getText().length(); 2020 CharSequence trimmedText = 2021 mTextView.getText().subSequence(trimStartIndex, trimEndIndex); 2022 int startIndex = mTextView.getSelectionStart() - trimStartIndex; 2023 int endIndex = mTextView.getSelectionEnd() - trimStartIndex; 2024 2025 if (updateSelection) { 2026 TextSelection textSelection = mTextView.getTextClassifier() 2027 .suggestSelection(trimmedText, startIndex, endIndex); 2028 startIndex = Math.max(0, textSelection.getSelectionStartIndex() + trimStartIndex); 2029 endIndex = Math.min(mTextView.getText().length(), 2030 textSelection.getSelectionEndIndex() + trimStartIndex); 2031 Selection.setSelection((Spannable) mTextView.getText(), startIndex, endIndex); 2032 return getTextClassifierInfo(false); 2033 } 2034 2035 return mTextView.getTextClassifier() 2036 .getTextClassificationResult(trimmedText, startIndex, endIndex); 2037 } 2038 2039 /** 2040 * If the TextView allows text selection, selects the current word when no existing selection 2041 * was available and starts a drag. 2042 * 2043 * @return true if the drag was started. 2044 */ 2045 private boolean selectCurrentWordAndStartDrag() { 2046 if (mInsertionActionModeRunnable != null) { 2047 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2048 } 2049 if (extractedTextModeWillBeStarted()) { 2050 return false; 2051 } 2052 if (!checkField()) { 2053 return false; 2054 } 2055 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2056 // No selection and cannot select a word. 2057 return false; 2058 } 2059 stopTextActionModeWithPreservingSelection(); 2060 getSelectionController().enterDrag( 2061 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2062 return true; 2063 } 2064 2065 /** 2066 * Checks whether a selection can be performed on the current TextView. 2067 * 2068 * @return true if a selection can be performed 2069 */ 2070 boolean checkField() { 2071 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2072 Log.w(TextView.LOG_TAG, 2073 "TextView does not support text selection. Selection cancelled."); 2074 return false; 2075 } 2076 return true; 2077 } 2078 2079 private boolean startSelectionActionModeInternal() { 2080 if (extractedTextModeWillBeStarted()) { 2081 return false; 2082 } 2083 if (mTextActionMode != null) { 2084 // Text action mode is already started 2085 invalidateActionMode(getTextClassifierInfo(false)); 2086 return false; 2087 } 2088 2089 if (!checkField() || !mTextView.hasSelection()) { 2090 return false; 2091 } 2092 2093 ActionMode.Callback actionModeCallback = 2094 new TextActionModeCallback(true /* hasSelection */); 2095 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2096 2097 final boolean selectionStarted = mTextActionMode != null; 2098 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2099 // Show the IME to be able to replace text, except when selecting non editable text. 2100 final InputMethodManager imm = InputMethodManager.peekInstance(); 2101 if (imm != null) { 2102 imm.showSoftInput(mTextView, 0, null); 2103 } 2104 } 2105 return selectionStarted; 2106 } 2107 2108 private boolean extractedTextModeWillBeStarted() { 2109 if (!(mTextView.isInExtractedMode())) { 2110 final InputMethodManager imm = InputMethodManager.peekInstance(); 2111 return imm != null && imm.isFullscreenMode(); 2112 } 2113 return false; 2114 } 2115 2116 /** 2117 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2118 * the current cursor position or selection range. This method is consistent with the 2119 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2120 */ 2121 private boolean shouldOfferToShowSuggestions() { 2122 CharSequence text = mTextView.getText(); 2123 if (!(text instanceof Spannable)) return false; 2124 2125 final Spannable spannable = (Spannable) text; 2126 final int selectionStart = mTextView.getSelectionStart(); 2127 final int selectionEnd = mTextView.getSelectionEnd(); 2128 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2129 SuggestionSpan.class); 2130 if (suggestionSpans.length == 0) { 2131 return false; 2132 } 2133 if (selectionStart == selectionEnd) { 2134 // Spans overlap the cursor. 2135 for (int i = 0; i < suggestionSpans.length; i++) { 2136 if (suggestionSpans[i].getSuggestions().length > 0) { 2137 return true; 2138 } 2139 } 2140 return false; 2141 } 2142 int minSpanStart = mTextView.getText().length(); 2143 int maxSpanEnd = 0; 2144 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2145 int unionOfSpansCoveringSelectionStartEnd = 0; 2146 boolean hasValidSuggestions = false; 2147 for (int i = 0; i < suggestionSpans.length; i++) { 2148 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2149 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2150 minSpanStart = Math.min(minSpanStart, spanStart); 2151 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2152 if (selectionStart < spanStart || selectionStart > spanEnd) { 2153 // The span doesn't cover the current selection start point. 2154 continue; 2155 } 2156 hasValidSuggestions = 2157 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2158 unionOfSpansCoveringSelectionStartStart = 2159 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2160 unionOfSpansCoveringSelectionStartEnd = 2161 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2162 } 2163 if (!hasValidSuggestions) { 2164 return false; 2165 } 2166 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2167 // No spans cover the selection start point. 2168 return false; 2169 } 2170 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2171 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2172 // There is a span that is not covered by the union. In this case, we soouldn't offer 2173 // to show suggestions as it's confusing. 2174 return false; 2175 } 2176 return true; 2177 } 2178 2179 /** 2180 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2181 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2182 */ 2183 private boolean isCursorInsideEasyCorrectionSpan() { 2184 Spannable spannable = (Spannable) mTextView.getText(); 2185 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2186 mTextView.getSelectionEnd(), SuggestionSpan.class); 2187 for (int i = 0; i < suggestionSpans.length; i++) { 2188 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2189 return true; 2190 } 2191 } 2192 return false; 2193 } 2194 2195 void onTouchUpEvent(MotionEvent event) { 2196 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2197 hideCursorAndSpanControllers(); 2198 stopTextActionMode(); 2199 CharSequence text = mTextView.getText(); 2200 if (!selectAllGotFocus && text.length() > 0) { 2201 // Move cursor 2202 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2203 Selection.setSelection((Spannable) text, offset); 2204 if (mSpellChecker != null) { 2205 // When the cursor moves, the word that was typed may need spell check 2206 mSpellChecker.onSelectionChanged(); 2207 } 2208 2209 if (!extractedTextModeWillBeStarted()) { 2210 if (isCursorInsideEasyCorrectionSpan()) { 2211 // Cancel the single tap delayed runnable. 2212 if (mInsertionActionModeRunnable != null) { 2213 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2214 } 2215 2216 mShowSuggestionRunnable = new Runnable() { 2217 public void run() { 2218 replace(); 2219 } 2220 }; 2221 // removeCallbacks is performed on every touch 2222 mTextView.postDelayed(mShowSuggestionRunnable, 2223 ViewConfiguration.getDoubleTapTimeout()); 2224 } else if (hasInsertionController()) { 2225 getInsertionController().show(); 2226 } 2227 } 2228 } 2229 } 2230 2231 protected void stopTextActionMode() { 2232 if (mTextActionMode != null) { 2233 // This will hide the mSelectionModifierCursorController 2234 mTextActionMode.finish(); 2235 } 2236 } 2237 2238 private void stopTextActionModeWithPreservingSelection() { 2239 if (mTextActionMode != null) { 2240 mRestartActionModeOnNextRefresh = true; 2241 } 2242 mPreserveSelection = true; 2243 stopTextActionMode(); 2244 mPreserveSelection = false; 2245 } 2246 2247 /** 2248 * @return True if this view supports insertion handles. 2249 */ 2250 boolean hasInsertionController() { 2251 return mInsertionControllerEnabled; 2252 } 2253 2254 /** 2255 * @return True if this view supports selection handles. 2256 */ 2257 boolean hasSelectionController() { 2258 return mSelectionControllerEnabled; 2259 } 2260 2261 private InsertionPointCursorController getInsertionController() { 2262 if (!mInsertionControllerEnabled) { 2263 return null; 2264 } 2265 2266 if (mInsertionPointCursorController == null) { 2267 mInsertionPointCursorController = new InsertionPointCursorController(); 2268 2269 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2270 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2271 } 2272 2273 return mInsertionPointCursorController; 2274 } 2275 2276 private SelectionModifierCursorController getSelectionController() { 2277 if (!mSelectionControllerEnabled) { 2278 return null; 2279 } 2280 2281 if (mSelectionModifierCursorController == null) { 2282 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2283 2284 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2285 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2286 } 2287 2288 return mSelectionModifierCursorController; 2289 } 2290 2291 @VisibleForTesting 2292 public Drawable[] getCursorDrawable() { 2293 return mCursorDrawable; 2294 } 2295 2296 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2297 if (mCursorDrawable[cursorIndex] == null) { 2298 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2299 mTextView.mCursorDrawableRes); 2300 } 2301 final Drawable drawable = mCursorDrawable[cursorIndex]; 2302 final int left = clampHorizontalPosition(drawable, horizontal); 2303 final int width = drawable.getIntrinsicWidth(); 2304 drawable.setBounds(left, top - mTempRect.top, left + width, 2305 bottom + mTempRect.bottom); 2306 } 2307 2308 /** 2309 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2310 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2311 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2312 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2313 * of the view. 2314 * 2315 * @param drawable Drawable. Can be null. 2316 * @param horizontal Horizontal position for the drawable. 2317 * @return The clamped horizontal position for the drawable. 2318 */ 2319 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2320 horizontal = Math.max(0.5f, horizontal - 0.5f); 2321 if (mTempRect == null) mTempRect = new Rect(); 2322 2323 int drawableWidth = 0; 2324 if (drawable != null) { 2325 drawable.getPadding(mTempRect); 2326 drawableWidth = drawable.getIntrinsicWidth(); 2327 } else { 2328 mTempRect.setEmpty(); 2329 } 2330 2331 int scrollX = mTextView.getScrollX(); 2332 float horizontalDiff = horizontal - scrollX; 2333 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2334 - mTextView.getCompoundPaddingRight(); 2335 2336 final int left; 2337 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2338 // at the rightmost position 2339 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2340 } else if (Math.abs(horizontalDiff) <= 1f 2341 || (TextUtils.isEmpty(mTextView.getText()) 2342 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2343 && horizontal <= 1f)) { 2344 // at the leftmost position 2345 left = scrollX - mTempRect.left; 2346 } else { 2347 left = (int) horizontal - mTempRect.left; 2348 } 2349 return left; 2350 } 2351 2352 /** 2353 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2354 * a dictionary) from the current input method, provided by it calling 2355 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2356 * implementation flashes the background of the corrected word to provide feedback to the user. 2357 * 2358 * @param info The auto correct info about the text that was corrected. 2359 */ 2360 public void onCommitCorrection(CorrectionInfo info) { 2361 if (mCorrectionHighlighter == null) { 2362 mCorrectionHighlighter = new CorrectionHighlighter(); 2363 } else { 2364 mCorrectionHighlighter.invalidate(false); 2365 } 2366 2367 mCorrectionHighlighter.highlight(info); 2368 mUndoInputFilter.freezeLastEdit(); 2369 } 2370 2371 void onScrollChanged() { 2372 if (mPositionListener != null) { 2373 mPositionListener.onScrollChanged(); 2374 } 2375 if (mTextActionMode != null) { 2376 mTextActionMode.invalidateContentRect(); 2377 } 2378 } 2379 2380 /** 2381 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2382 */ 2383 private boolean shouldBlink() { 2384 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2385 2386 final int start = mTextView.getSelectionStart(); 2387 if (start < 0) return false; 2388 2389 final int end = mTextView.getSelectionEnd(); 2390 if (end < 0) return false; 2391 2392 return start == end; 2393 } 2394 2395 void makeBlink() { 2396 if (shouldBlink()) { 2397 mShowCursor = SystemClock.uptimeMillis(); 2398 if (mBlink == null) mBlink = new Blink(); 2399 mTextView.removeCallbacks(mBlink); 2400 mTextView.postDelayed(mBlink, BLINK); 2401 } else { 2402 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2403 } 2404 } 2405 2406 private class Blink implements Runnable { 2407 private boolean mCancelled; 2408 2409 public void run() { 2410 if (mCancelled) { 2411 return; 2412 } 2413 2414 mTextView.removeCallbacks(this); 2415 2416 if (shouldBlink()) { 2417 if (mTextView.getLayout() != null) { 2418 mTextView.invalidateCursorPath(); 2419 } 2420 2421 mTextView.postDelayed(this, BLINK); 2422 } 2423 } 2424 2425 void cancel() { 2426 if (!mCancelled) { 2427 mTextView.removeCallbacks(this); 2428 mCancelled = true; 2429 } 2430 } 2431 2432 void uncancel() { 2433 mCancelled = false; 2434 } 2435 } 2436 2437 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2438 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2439 com.android.internal.R.layout.text_drag_thumbnail, null); 2440 2441 if (shadowView == null) { 2442 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2443 } 2444 2445 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2446 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2447 end = TextUtils.unpackRangeEndFromLong(range); 2448 } 2449 final CharSequence text = mTextView.getTransformedText(start, end); 2450 shadowView.setText(text); 2451 shadowView.setTextColor(mTextView.getTextColors()); 2452 2453 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2454 shadowView.setGravity(Gravity.CENTER); 2455 2456 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2457 ViewGroup.LayoutParams.WRAP_CONTENT)); 2458 2459 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2460 shadowView.measure(size, size); 2461 2462 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2463 shadowView.invalidate(); 2464 return new DragShadowBuilder(shadowView); 2465 } 2466 2467 private static class DragLocalState { 2468 public TextView sourceTextView; 2469 public int start, end; 2470 2471 public DragLocalState(TextView sourceTextView, int start, int end) { 2472 this.sourceTextView = sourceTextView; 2473 this.start = start; 2474 this.end = end; 2475 } 2476 } 2477 2478 void onDrop(DragEvent event) { 2479 SpannableStringBuilder content = new SpannableStringBuilder(); 2480 2481 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2482 if (permissions != null) { 2483 permissions.takeTransient(); 2484 } 2485 2486 try { 2487 ClipData clipData = event.getClipData(); 2488 final int itemCount = clipData.getItemCount(); 2489 for (int i = 0; i < itemCount; i++) { 2490 Item item = clipData.getItemAt(i); 2491 content.append(item.coerceToStyledText(mTextView.getContext())); 2492 } 2493 } finally { 2494 if (permissions != null) { 2495 permissions.release(); 2496 } 2497 } 2498 2499 mTextView.beginBatchEdit(); 2500 mUndoInputFilter.freezeLastEdit(); 2501 try { 2502 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2503 Object localState = event.getLocalState(); 2504 DragLocalState dragLocalState = null; 2505 if (localState instanceof DragLocalState) { 2506 dragLocalState = (DragLocalState) localState; 2507 } 2508 boolean dragDropIntoItself = dragLocalState != null 2509 && dragLocalState.sourceTextView == mTextView; 2510 2511 if (dragDropIntoItself) { 2512 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2513 // A drop inside the original selection discards the drop. 2514 return; 2515 } 2516 } 2517 2518 final int originalLength = mTextView.getText().length(); 2519 int min = offset; 2520 int max = offset; 2521 2522 Selection.setSelection((Spannable) mTextView.getText(), max); 2523 mTextView.replaceText_internal(min, max, content); 2524 2525 if (dragDropIntoItself) { 2526 int dragSourceStart = dragLocalState.start; 2527 int dragSourceEnd = dragLocalState.end; 2528 if (max <= dragSourceStart) { 2529 // Inserting text before selection has shifted positions 2530 final int shift = mTextView.getText().length() - originalLength; 2531 dragSourceStart += shift; 2532 dragSourceEnd += shift; 2533 } 2534 2535 // Delete original selection 2536 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2537 2538 // Make sure we do not leave two adjacent spaces. 2539 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2540 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2541 if (nextCharIdx > prevCharIdx + 1) { 2542 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2543 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2544 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2545 } 2546 } 2547 } 2548 } finally { 2549 mTextView.endBatchEdit(); 2550 mUndoInputFilter.freezeLastEdit(); 2551 } 2552 } 2553 2554 public void addSpanWatchers(Spannable text) { 2555 final int textLength = text.length(); 2556 2557 if (mKeyListener != null) { 2558 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2559 } 2560 2561 if (mSpanController == null) { 2562 mSpanController = new SpanController(); 2563 } 2564 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2565 } 2566 2567 void setContextMenuAnchor(float x, float y) { 2568 mContextMenuAnchorX = x; 2569 mContextMenuAnchorY = y; 2570 } 2571 2572 void onCreateContextMenu(ContextMenu menu) { 2573 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2574 || Float.isNaN(mContextMenuAnchorY)) { 2575 return; 2576 } 2577 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2578 if (offset == -1) { 2579 return; 2580 } 2581 stopTextActionModeWithPreservingSelection(); 2582 final boolean isOnSelection = mTextView.hasSelection() 2583 && offset >= mTextView.getSelectionStart() && offset <= mTextView.getSelectionEnd(); 2584 if (!isOnSelection) { 2585 // Right clicked position is not on the selection. Remove the selection and move the 2586 // cursor to the right clicked position. 2587 Selection.setSelection((Spannable) mTextView.getText(), offset); 2588 stopTextActionMode(); 2589 } 2590 2591 if (shouldOfferToShowSuggestions()) { 2592 final SuggestionInfo[] suggestionInfoArray = 2593 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2594 for (int i = 0; i < suggestionInfoArray.length; i++) { 2595 suggestionInfoArray[i] = new SuggestionInfo(); 2596 } 2597 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2598 com.android.internal.R.string.replace); 2599 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2600 for (int i = 0; i < numItems; i++) { 2601 final SuggestionInfo info = suggestionInfoArray[i]; 2602 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2603 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2604 @Override 2605 public boolean onMenuItemClick(MenuItem item) { 2606 replaceWithSuggestion(info); 2607 return true; 2608 } 2609 }); 2610 } 2611 } 2612 2613 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2614 com.android.internal.R.string.undo) 2615 .setAlphabeticShortcut('z') 2616 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2617 .setEnabled(mTextView.canUndo()); 2618 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2619 com.android.internal.R.string.redo) 2620 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2621 .setEnabled(mTextView.canRedo()); 2622 2623 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2624 com.android.internal.R.string.cut) 2625 .setAlphabeticShortcut('x') 2626 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2627 .setEnabled(mTextView.canCut()); 2628 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2629 com.android.internal.R.string.copy) 2630 .setAlphabeticShortcut('c') 2631 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2632 .setEnabled(mTextView.canCopy()); 2633 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2634 com.android.internal.R.string.paste) 2635 .setAlphabeticShortcut('v') 2636 .setEnabled(mTextView.canPaste()) 2637 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2638 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2639 com.android.internal.R.string.paste_as_plain_text) 2640 .setEnabled(mTextView.canPaste()) 2641 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2642 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2643 com.android.internal.R.string.share) 2644 .setEnabled(mTextView.canShare()) 2645 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2646 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2647 com.android.internal.R.string.selectAll) 2648 .setAlphabeticShortcut('a') 2649 .setEnabled(mTextView.canSelectAllText()) 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, mTextClassificationResult); 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 updateSelectAllItem(menu); 3836 updateReplaceItem(menu); 3837 } 3838 3839 @Override 3840 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3841 updateSelectAllItem(menu); 3842 updateReplaceItem(menu); 3843 updateAssistMenuItem(menu, mTextClassificationResult); 3844 3845 Callback customCallback = getCustomCallback(); 3846 if (customCallback != null) { 3847 return customCallback.onPrepareActionMode(mode, menu); 3848 } 3849 return true; 3850 } 3851 3852 private void updateSelectAllItem(Menu menu) { 3853 boolean canSelectAll = mTextView.canSelectAllText(); 3854 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3855 if (canSelectAll && !selectAllItemExists) { 3856 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3857 com.android.internal.R.string.selectAll) 3858 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3859 } else if (!canSelectAll && selectAllItemExists) { 3860 menu.removeItem(TextView.ID_SELECT_ALL); 3861 } 3862 } 3863 3864 private void updateReplaceItem(Menu menu) { 3865 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3866 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3867 if (canReplace && !replaceItemExists) { 3868 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3869 com.android.internal.R.string.replace) 3870 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3871 } else if (!canReplace && replaceItemExists) { 3872 menu.removeItem(TextView.ID_REPLACE); 3873 } 3874 } 3875 3876 private void updateAssistMenuItem( 3877 Menu menu, TextClassificationResult textClassificationResult) { 3878 menu.removeItem(TextView.ID_ASSIST); 3879 if (textClassificationResult != null) { 3880 final Drawable icon = textClassificationResult.getIcon(); 3881 final CharSequence label = textClassificationResult.getLabel(); 3882 final OnClickListener onClickListener = 3883 textClassificationResult.getOnClickListener(); 3884 final Intent intent = textClassificationResult.getIntent(); 3885 if ((icon != null || !TextUtils.isEmpty(label)) 3886 && (onClickListener != null || intent != null)) { 3887 menu.add(Menu.NONE, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, label) 3888 .setIcon(icon) 3889 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3890 } 3891 } 3892 } 3893 3894 @Override 3895 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3896 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3897 return true; 3898 } 3899 Callback customCallback = getCustomCallback(); 3900 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3901 return true; 3902 } 3903 final TextClassificationResult textClassificationResult = mTextClassificationResult; 3904 if (TextView.ID_ASSIST == item.getItemId() && textClassificationResult != null) { 3905 final OnClickListener onClickListener = 3906 textClassificationResult.getOnClickListener(); 3907 if (onClickListener != null) { 3908 onClickListener.onClick(mTextView); 3909 } else { 3910 final Intent intent = textClassificationResult.getIntent(); 3911 if (intent != null) { 3912 TextClassificationResult.createStartActivityOnClick( 3913 mTextView.getContext(), intent) 3914 .onClick(mTextView); 3915 } 3916 } 3917 stopTextActionMode(); 3918 return true; 3919 } 3920 return mTextView.onTextContextMenuItem(item.getItemId()); 3921 } 3922 3923 @Override 3924 public void onDestroyActionMode(ActionMode mode) { 3925 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3926 mTextActionMode = null; 3927 mTextClassificationResult = null; 3928 Callback customCallback = getCustomCallback(); 3929 if (customCallback != null) { 3930 customCallback.onDestroyActionMode(mode); 3931 } 3932 3933 if (!mPreserveSelection) { 3934 /* 3935 * Leave current selection when we tentatively destroy action mode for the 3936 * selection. If we're detaching from a window, we'll bring back the selection 3937 * mode when (if) we get reattached. 3938 */ 3939 Selection.setSelection((Spannable) mTextView.getText(), 3940 mTextView.getSelectionEnd()); 3941 } 3942 3943 if (mSelectionModifierCursorController != null) { 3944 mSelectionModifierCursorController.hide(); 3945 } 3946 } 3947 3948 @Override 3949 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3950 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3951 super.onGetContentRect(mode, view, outRect); 3952 return; 3953 } 3954 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3955 // We have a selection. 3956 mSelectionPath.reset(); 3957 mTextView.getLayout().getSelectionPath( 3958 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3959 mSelectionPath.computeBounds(mSelectionBounds, true); 3960 mSelectionBounds.bottom += mHandleHeight; 3961 } else if (mCursorCount == 2) { 3962 // We have a split cursor. In this case, we take the rectangle that includes both 3963 // parts of the cursor to ensure we don't obscure either of them. 3964 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3965 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3966 mSelectionBounds.set( 3967 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3968 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3969 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3970 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3971 + mHandleHeight); 3972 } else { 3973 // We have a single cursor. 3974 Layout layout = mTextView.getLayout(); 3975 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 3976 float primaryHorizontal = clampHorizontalPosition(null, 3977 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 3978 mSelectionBounds.set( 3979 primaryHorizontal, 3980 layout.getLineTop(line), 3981 primaryHorizontal, 3982 layout.getLineTop(line + 1) + mHandleHeight); 3983 } 3984 // Take TextView's padding and scroll into account. 3985 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3986 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3987 outRect.set( 3988 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3989 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3990 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3991 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3992 } 3993 } 3994 3995 /** 3996 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3997 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3998 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3999 */ 4000 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4001 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4002 final int[] mTmpIntOffset = new int[2]; 4003 final Matrix mViewToScreenMatrix = new Matrix(); 4004 4005 @Override 4006 public void updatePosition(int parentPositionX, int parentPositionY, 4007 boolean parentPositionChanged, boolean parentScrolled) { 4008 final InputMethodState ims = mInputMethodState; 4009 if (ims == null || ims.mBatchEditNesting > 0) { 4010 return; 4011 } 4012 final InputMethodManager imm = InputMethodManager.peekInstance(); 4013 if (null == imm) { 4014 return; 4015 } 4016 if (!imm.isActive(mTextView)) { 4017 return; 4018 } 4019 // Skip if the IME has not requested the cursor/anchor position. 4020 if (!imm.isCursorAnchorInfoEnabled()) { 4021 return; 4022 } 4023 Layout layout = mTextView.getLayout(); 4024 if (layout == null) { 4025 return; 4026 } 4027 4028 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4029 builder.reset(); 4030 4031 final int selectionStart = mTextView.getSelectionStart(); 4032 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4033 4034 // Construct transformation matrix from view local coordinates to screen coordinates. 4035 mViewToScreenMatrix.set(mTextView.getMatrix()); 4036 mTextView.getLocationOnScreen(mTmpIntOffset); 4037 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4038 builder.setMatrix(mViewToScreenMatrix); 4039 4040 final float viewportToContentHorizontalOffset = 4041 mTextView.viewportToContentHorizontalOffset(); 4042 final float viewportToContentVerticalOffset = 4043 mTextView.viewportToContentVerticalOffset(); 4044 4045 final CharSequence text = mTextView.getText(); 4046 if (text instanceof Spannable) { 4047 final Spannable sp = (Spannable) text; 4048 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4049 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4050 if (composingTextEnd < composingTextStart) { 4051 final int temp = composingTextEnd; 4052 composingTextEnd = composingTextStart; 4053 composingTextStart = temp; 4054 } 4055 final boolean hasComposingText = 4056 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4057 if (hasComposingText) { 4058 final CharSequence composingText = text.subSequence(composingTextStart, 4059 composingTextEnd); 4060 builder.setComposingText(composingTextStart, composingText); 4061 mTextView.populateCharacterBounds(builder, composingTextStart, 4062 composingTextEnd, viewportToContentHorizontalOffset, 4063 viewportToContentVerticalOffset); 4064 } 4065 } 4066 4067 // Treat selectionStart as the insertion point. 4068 if (0 <= selectionStart) { 4069 final int offset = selectionStart; 4070 final int line = layout.getLineForOffset(offset); 4071 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4072 + viewportToContentHorizontalOffset; 4073 final float insertionMarkerTop = layout.getLineTop(line) 4074 + viewportToContentVerticalOffset; 4075 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4076 + viewportToContentVerticalOffset; 4077 final float insertionMarkerBottom = layout.getLineBottom(line) 4078 + viewportToContentVerticalOffset; 4079 final boolean isTopVisible = mTextView 4080 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4081 final boolean isBottomVisible = mTextView 4082 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4083 int insertionMarkerFlags = 0; 4084 if (isTopVisible || isBottomVisible) { 4085 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4086 } 4087 if (!isTopVisible || !isBottomVisible) { 4088 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4089 } 4090 if (layout.isRtlCharAt(offset)) { 4091 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4092 } 4093 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4094 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4095 } 4096 4097 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4098 } 4099 } 4100 4101 @VisibleForTesting 4102 public abstract class HandleView extends View implements TextViewPositionListener { 4103 protected Drawable mDrawable; 4104 protected Drawable mDrawableLtr; 4105 protected Drawable mDrawableRtl; 4106 private final PopupWindow mContainer; 4107 // Position with respect to the parent TextView 4108 private int mPositionX, mPositionY; 4109 private boolean mIsDragging; 4110 // Offset from touch position to mPosition 4111 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4112 protected int mHotspotX; 4113 protected int mHorizontalGravity; 4114 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4115 private float mTouchOffsetY; 4116 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4117 private float mIdealVerticalOffset; 4118 // Parent's (TextView) previous position in window 4119 private int mLastParentX, mLastParentY; 4120 // Parent's (TextView) previous position on screen 4121 private int mLastParentXOnScreen, mLastParentYOnScreen; 4122 // Previous text character offset 4123 protected int mPreviousOffset = -1; 4124 // Previous text character offset 4125 private boolean mPositionHasChanged = true; 4126 // Minimum touch target size for handles 4127 private int mMinSize; 4128 // Indicates the line of text that the handle is on. 4129 protected int mPrevLine = UNSET_LINE; 4130 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4131 // when selecting text when the handles jump to the end / start of words which may be on 4132 // a different line. 4133 protected int mPreviousLineTouched = UNSET_LINE; 4134 4135 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4136 super(mTextView.getContext()); 4137 setId(id); 4138 mContainer = new PopupWindow(mTextView.getContext(), null, 4139 com.android.internal.R.attr.textSelectHandleWindowStyle); 4140 mContainer.setSplitTouchEnabled(true); 4141 mContainer.setClippingEnabled(false); 4142 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4143 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4144 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4145 mContainer.setContentView(this); 4146 4147 mDrawableLtr = drawableLtr; 4148 mDrawableRtl = drawableRtl; 4149 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4150 com.android.internal.R.dimen.text_handle_min_size); 4151 4152 updateDrawable(); 4153 4154 final int handleHeight = getPreferredHeight(); 4155 mTouchOffsetY = -0.3f * handleHeight; 4156 mIdealVerticalOffset = 0.7f * handleHeight; 4157 } 4158 4159 public float getIdealVerticalOffset() { 4160 return mIdealVerticalOffset; 4161 } 4162 4163 protected void updateDrawable() { 4164 if (mIsDragging) { 4165 // Don't update drawable during dragging. 4166 return; 4167 } 4168 final Layout layout = mTextView.getLayout(); 4169 if (layout == null) { 4170 return; 4171 } 4172 final int offset = getCurrentCursorOffset(); 4173 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4174 final Drawable oldDrawable = mDrawable; 4175 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4176 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4177 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4178 if (oldDrawable != mDrawable && isShowing()) { 4179 // Update popup window position. 4180 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4181 - getHorizontalOffset() + getCursorOffset(); 4182 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4183 mPositionHasChanged = true; 4184 updatePosition(mLastParentX, mLastParentY, false, false); 4185 postInvalidate(); 4186 } 4187 } 4188 4189 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4190 protected abstract int getHorizontalGravity(boolean isRtlRun); 4191 4192 // Touch-up filter: number of previous positions remembered 4193 private static final int HISTORY_SIZE = 5; 4194 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4195 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4196 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4197 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4198 private int mPreviousOffsetIndex = 0; 4199 private int mNumberPreviousOffsets = 0; 4200 4201 private void startTouchUpFilter(int offset) { 4202 mNumberPreviousOffsets = 0; 4203 addPositionToTouchUpFilter(offset); 4204 } 4205 4206 private void addPositionToTouchUpFilter(int offset) { 4207 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4208 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4209 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4210 mNumberPreviousOffsets++; 4211 } 4212 4213 private void filterOnTouchUp() { 4214 final long now = SystemClock.uptimeMillis(); 4215 int i = 0; 4216 int index = mPreviousOffsetIndex; 4217 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4218 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4219 i++; 4220 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4221 } 4222 4223 if (i > 0 && i < iMax 4224 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4225 positionAtCursorOffset(mPreviousOffsets[index], false); 4226 } 4227 } 4228 4229 public boolean offsetHasBeenChanged() { 4230 return mNumberPreviousOffsets > 1; 4231 } 4232 4233 @Override 4234 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4235 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4236 } 4237 4238 @Override 4239 public void invalidate() { 4240 super.invalidate(); 4241 if (isShowing()) { 4242 positionAtCursorOffset(getCurrentCursorOffset(), true); 4243 } 4244 }; 4245 4246 private int getPreferredWidth() { 4247 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4248 } 4249 4250 private int getPreferredHeight() { 4251 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4252 } 4253 4254 public void show() { 4255 if (isShowing()) return; 4256 4257 getPositionListener().addSubscriber(this, true /* local position may change */); 4258 4259 // Make sure the offset is always considered new, even when focusing at same position 4260 mPreviousOffset = -1; 4261 positionAtCursorOffset(getCurrentCursorOffset(), false); 4262 } 4263 4264 protected void dismiss() { 4265 mIsDragging = false; 4266 mContainer.dismiss(); 4267 onDetached(); 4268 } 4269 4270 public void hide() { 4271 dismiss(); 4272 4273 getPositionListener().removeSubscriber(this); 4274 } 4275 4276 public boolean isShowing() { 4277 return mContainer.isShowing(); 4278 } 4279 4280 private boolean isVisible() { 4281 // Always show a dragging handle. 4282 if (mIsDragging) { 4283 return true; 4284 } 4285 4286 if (mTextView.isInBatchEditMode()) { 4287 return false; 4288 } 4289 4290 return mTextView.isPositionVisible( 4291 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4292 } 4293 4294 public abstract int getCurrentCursorOffset(); 4295 4296 protected abstract void updateSelection(int offset); 4297 4298 public abstract void updatePosition(float x, float y); 4299 4300 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4301 return layout.isRtlCharAt(offset); 4302 } 4303 4304 @VisibleForTesting 4305 public float getHorizontal(@NonNull Layout layout, int offset) { 4306 return layout.getPrimaryHorizontal(offset); 4307 } 4308 4309 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4310 return mTextView.getOffsetAtCoordinate(line, x); 4311 } 4312 4313 /** 4314 * @param offset Cursor offset. Must be in [-1, length]. 4315 * @param forceUpdatePosition whether to force update the position. This should be true 4316 * when If the parent has been scrolled, for example. 4317 */ 4318 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4319 // A HandleView relies on the layout, which may be nulled by external methods 4320 Layout layout = mTextView.getLayout(); 4321 if (layout == null) { 4322 // Will update controllers' state, hiding them and stopping selection mode if needed 4323 prepareCursorControllers(); 4324 return; 4325 } 4326 layout = mTextView.getLayout(); 4327 4328 boolean offsetChanged = offset != mPreviousOffset; 4329 if (offsetChanged || forceUpdatePosition) { 4330 if (offsetChanged) { 4331 updateSelection(offset); 4332 addPositionToTouchUpFilter(offset); 4333 } 4334 final int line = getLineForOffset(layout, offset); 4335 mPrevLine = line; 4336 4337 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4338 - getHorizontalOffset() + getCursorOffset(); 4339 mPositionY = layout.getLineBottom(line); 4340 4341 // Take TextView's padding and scroll into account. 4342 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4343 mPositionY += mTextView.viewportToContentVerticalOffset(); 4344 4345 mPreviousOffset = offset; 4346 mPositionHasChanged = true; 4347 } 4348 } 4349 4350 /** 4351 * Return the clamped horizontal position for the first cursor. 4352 * 4353 * @param layout Text layout. 4354 * @param offset Character offset for the cursor. 4355 * @return The clamped horizontal position for the cursor. 4356 */ 4357 int getCursorHorizontalPosition(Layout layout, int offset) { 4358 return (int) (getHorizontal(layout, offset) - 0.5f); 4359 } 4360 4361 /** 4362 * @param layout Text layout. 4363 * @param offset Character offset for the cursor. 4364 * @return The line the cursor should be at. 4365 */ 4366 int getLineForOffset(Layout layout, int offset) { 4367 return layout.getLineForOffset(offset); 4368 } 4369 4370 @Override 4371 public void updatePosition(int parentPositionX, int parentPositionY, 4372 boolean parentPositionChanged, boolean parentScrolled) { 4373 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 4374 if (parentPositionChanged || mPositionHasChanged) { 4375 if (mIsDragging) { 4376 // Update touchToWindow offset in case of parent scrolling while dragging 4377 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4378 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4379 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4380 mLastParentX = parentPositionX; 4381 mLastParentY = parentPositionY; 4382 } 4383 4384 onHandleMoved(); 4385 } 4386 4387 if (isVisible()) { 4388 // Transform to the window coordinates to follow the view tranformation. 4389 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4390 mTextView.transformFromViewToWindowSpace(pts); 4391 pts[0] -= mHotspotX + getHorizontalOffset(); 4392 4393 if (isShowing()) { 4394 mContainer.update(pts[0], pts[1], -1, -1); 4395 } else { 4396 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4397 } 4398 } else { 4399 if (isShowing()) { 4400 dismiss(); 4401 } 4402 } 4403 4404 mPositionHasChanged = false; 4405 } 4406 } 4407 4408 @Override 4409 protected void onDraw(Canvas c) { 4410 final int drawWidth = mDrawable.getIntrinsicWidth(); 4411 final int left = getHorizontalOffset(); 4412 4413 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4414 mDrawable.draw(c); 4415 } 4416 4417 private int getHorizontalOffset() { 4418 final int width = getPreferredWidth(); 4419 final int drawWidth = mDrawable.getIntrinsicWidth(); 4420 final int left; 4421 switch (mHorizontalGravity) { 4422 case Gravity.LEFT: 4423 left = 0; 4424 break; 4425 default: 4426 case Gravity.CENTER: 4427 left = (width - drawWidth) / 2; 4428 break; 4429 case Gravity.RIGHT: 4430 left = width - drawWidth; 4431 break; 4432 } 4433 return left; 4434 } 4435 4436 protected int getCursorOffset() { 4437 return 0; 4438 } 4439 4440 @Override 4441 public boolean onTouchEvent(MotionEvent ev) { 4442 updateFloatingToolbarVisibility(ev); 4443 4444 switch (ev.getActionMasked()) { 4445 case MotionEvent.ACTION_DOWN: { 4446 startTouchUpFilter(getCurrentCursorOffset()); 4447 4448 final PositionListener positionListener = getPositionListener(); 4449 mLastParentX = positionListener.getPositionX(); 4450 mLastParentY = positionListener.getPositionY(); 4451 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4452 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4453 4454 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4455 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4456 mTouchToWindowOffsetX = xInWindow - mPositionX; 4457 mTouchToWindowOffsetY = yInWindow - mPositionY; 4458 4459 mIsDragging = true; 4460 mPreviousLineTouched = UNSET_LINE; 4461 break; 4462 } 4463 4464 case MotionEvent.ACTION_MOVE: { 4465 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4466 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4467 4468 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4469 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4470 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4471 float newVerticalOffset; 4472 if (previousVerticalOffset < mIdealVerticalOffset) { 4473 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4474 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4475 } else { 4476 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4477 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4478 } 4479 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4480 4481 final float newPosX = 4482 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4483 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4484 4485 updatePosition(newPosX, newPosY); 4486 break; 4487 } 4488 4489 case MotionEvent.ACTION_UP: 4490 filterOnTouchUp(); 4491 mIsDragging = false; 4492 updateDrawable(); 4493 break; 4494 4495 case MotionEvent.ACTION_CANCEL: 4496 mIsDragging = false; 4497 updateDrawable(); 4498 break; 4499 } 4500 return true; 4501 } 4502 4503 public boolean isDragging() { 4504 return mIsDragging; 4505 } 4506 4507 void onHandleMoved() {} 4508 4509 public void onDetached() {} 4510 } 4511 4512 private class InsertionHandleView extends HandleView { 4513 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4514 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4515 4516 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4517 private float mDownPositionX, mDownPositionY; 4518 private Runnable mHider; 4519 4520 public InsertionHandleView(Drawable drawable) { 4521 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4522 } 4523 4524 @Override 4525 public void show() { 4526 super.show(); 4527 4528 final long durationSinceCutOrCopy = 4529 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4530 4531 // Cancel the single tap delayed runnable. 4532 if (mInsertionActionModeRunnable != null 4533 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4534 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4535 || isCursorInsideEasyCorrectionSpan())) { 4536 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4537 } 4538 4539 // Prepare and schedule the single tap runnable to run exactly after the double tap 4540 // timeout has passed. 4541 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4542 && !isCursorInsideEasyCorrectionSpan() 4543 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4544 if (mTextActionMode == null) { 4545 if (mInsertionActionModeRunnable == null) { 4546 mInsertionActionModeRunnable = new Runnable() { 4547 @Override 4548 public void run() { 4549 startInsertionActionMode(); 4550 } 4551 }; 4552 } 4553 mTextView.postDelayed( 4554 mInsertionActionModeRunnable, 4555 ViewConfiguration.getDoubleTapTimeout() + 1); 4556 } 4557 4558 } 4559 4560 hideAfterDelay(); 4561 } 4562 4563 private void hideAfterDelay() { 4564 if (mHider == null) { 4565 mHider = new Runnable() { 4566 public void run() { 4567 hide(); 4568 } 4569 }; 4570 } else { 4571 removeHiderCallback(); 4572 } 4573 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4574 } 4575 4576 private void removeHiderCallback() { 4577 if (mHider != null) { 4578 mTextView.removeCallbacks(mHider); 4579 } 4580 } 4581 4582 @Override 4583 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4584 return drawable.getIntrinsicWidth() / 2; 4585 } 4586 4587 @Override 4588 protected int getHorizontalGravity(boolean isRtlRun) { 4589 return Gravity.CENTER_HORIZONTAL; 4590 } 4591 4592 @Override 4593 protected int getCursorOffset() { 4594 int offset = super.getCursorOffset(); 4595 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4596 if (cursor != null) { 4597 cursor.getPadding(mTempRect); 4598 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4599 } 4600 return offset; 4601 } 4602 4603 @Override 4604 int getCursorHorizontalPosition(Layout layout, int offset) { 4605 final Drawable drawable = mCursorCount > 0 ? mCursorDrawable[0] : null; 4606 if (drawable != null) { 4607 final float horizontal = getHorizontal(layout, offset); 4608 return clampHorizontalPosition(drawable, horizontal) + mTempRect.left; 4609 } 4610 return super.getCursorHorizontalPosition(layout, offset); 4611 } 4612 4613 @Override 4614 public boolean onTouchEvent(MotionEvent ev) { 4615 final boolean result = super.onTouchEvent(ev); 4616 4617 switch (ev.getActionMasked()) { 4618 case MotionEvent.ACTION_DOWN: 4619 mDownPositionX = ev.getRawX(); 4620 mDownPositionY = ev.getRawY(); 4621 break; 4622 4623 case MotionEvent.ACTION_UP: 4624 if (!offsetHasBeenChanged()) { 4625 final float deltaX = mDownPositionX - ev.getRawX(); 4626 final float deltaY = mDownPositionY - ev.getRawY(); 4627 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4628 4629 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4630 mTextView.getContext()); 4631 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4632 4633 if (distanceSquared < touchSlop * touchSlop) { 4634 // Tapping on the handle toggles the insertion action mode. 4635 if (mTextActionMode != null) { 4636 stopTextActionMode(); 4637 } else { 4638 startInsertionActionMode(); 4639 } 4640 } 4641 } else { 4642 if (mTextActionMode != null) { 4643 mTextActionMode.invalidateContentRect(); 4644 } 4645 } 4646 hideAfterDelay(); 4647 break; 4648 4649 case MotionEvent.ACTION_CANCEL: 4650 hideAfterDelay(); 4651 break; 4652 4653 default: 4654 break; 4655 } 4656 4657 return result; 4658 } 4659 4660 @Override 4661 public int getCurrentCursorOffset() { 4662 return mTextView.getSelectionStart(); 4663 } 4664 4665 @Override 4666 public void updateSelection(int offset) { 4667 Selection.setSelection((Spannable) mTextView.getText(), offset); 4668 } 4669 4670 @Override 4671 public void updatePosition(float x, float y) { 4672 Layout layout = mTextView.getLayout(); 4673 int offset; 4674 if (layout != null) { 4675 if (mPreviousLineTouched == UNSET_LINE) { 4676 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4677 } 4678 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4679 offset = getOffsetAtCoordinate(layout, currLine, x); 4680 mPreviousLineTouched = currLine; 4681 } else { 4682 offset = -1; 4683 } 4684 positionAtCursorOffset(offset, false); 4685 if (mTextActionMode != null) { 4686 invalidateActionMode(getTextClassifierInfo(false)); 4687 } 4688 } 4689 4690 @Override 4691 void onHandleMoved() { 4692 super.onHandleMoved(); 4693 removeHiderCallback(); 4694 } 4695 4696 @Override 4697 public void onDetached() { 4698 super.onDetached(); 4699 removeHiderCallback(); 4700 } 4701 } 4702 4703 @Retention(RetentionPolicy.SOURCE) 4704 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4705 public @interface HandleType {} 4706 public static final int HANDLE_TYPE_SELECTION_START = 0; 4707 public static final int HANDLE_TYPE_SELECTION_END = 1; 4708 4709 private class SelectionHandleView extends HandleView { 4710 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4711 // end (HANDLE_TYPE_SELECTION_END). 4712 @HandleType 4713 private final int mHandleType; 4714 // Indicates whether the cursor is making adjustments within a word. 4715 private boolean mInWord = false; 4716 // Difference between touch position and word boundary position. 4717 private float mTouchWordDelta; 4718 // X value of the previous updatePosition call. 4719 private float mPrevX; 4720 // Indicates if the handle has moved a boundary between LTR and RTL text. 4721 private boolean mLanguageDirectionChanged = false; 4722 // Distance from edge of horizontally scrolling text view 4723 // to use to switch to character mode. 4724 private final float mTextViewEdgeSlop; 4725 // Used to save text view location. 4726 private final int[] mTextViewLocation = new int[2]; 4727 4728 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4729 @HandleType int handleType) { 4730 super(drawableLtr, drawableRtl, id); 4731 mHandleType = handleType; 4732 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4733 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4734 } 4735 4736 private boolean isStartHandle() { 4737 return mHandleType == HANDLE_TYPE_SELECTION_START; 4738 } 4739 4740 @Override 4741 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4742 if (isRtlRun == isStartHandle()) { 4743 return drawable.getIntrinsicWidth() / 4; 4744 } else { 4745 return (drawable.getIntrinsicWidth() * 3) / 4; 4746 } 4747 } 4748 4749 @Override 4750 protected int getHorizontalGravity(boolean isRtlRun) { 4751 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4752 } 4753 4754 @Override 4755 public int getCurrentCursorOffset() { 4756 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4757 } 4758 4759 @Override 4760 protected void updateSelection(int offset) { 4761 if (isStartHandle()) { 4762 Selection.setSelection((Spannable) mTextView.getText(), offset, 4763 mTextView.getSelectionEnd()); 4764 } else { 4765 Selection.setSelection((Spannable) mTextView.getText(), 4766 mTextView.getSelectionStart(), offset); 4767 } 4768 updateDrawable(); 4769 if (mTextActionMode != null) { 4770 invalidateActionMode(getTextClassifierInfo(false)); 4771 } 4772 } 4773 4774 @Override 4775 public void updatePosition(float x, float y) { 4776 final Layout layout = mTextView.getLayout(); 4777 if (layout == null) { 4778 // HandleView will deal appropriately in positionAtCursorOffset when 4779 // layout is null. 4780 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y)); 4781 return; 4782 } 4783 4784 if (mPreviousLineTouched == UNSET_LINE) { 4785 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4786 } 4787 4788 boolean positionCursor = false; 4789 final int anotherHandleOffset = 4790 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4791 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4792 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4793 4794 if (isStartHandle() && initialOffset >= anotherHandleOffset 4795 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4796 // Handles have crossed, bound it to the first selected line and 4797 // adjust by word / char as normal. 4798 currLine = getLineForOffset(layout, anotherHandleOffset, !isStartHandle()); 4799 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4800 } 4801 4802 int offset = initialOffset; 4803 final int wordEnd = getWordEnd(offset); 4804 final int wordStart = getWordStart(offset); 4805 4806 if (mPrevX == UNSET_X_VALUE) { 4807 mPrevX = x; 4808 } 4809 4810 final int currentOffset = getCurrentCursorOffset(); 4811 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4812 final boolean atRtl = isAtRtlRun(layout, offset); 4813 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4814 4815 // We can't determine if the user is expanding or shrinking the selection if they're 4816 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4817 // the cursor at the current position. 4818 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4819 // We're on a boundary or this is the first direction change -- just update 4820 // to the current position. 4821 mLanguageDirectionChanged = true; 4822 mTouchWordDelta = 0.0f; 4823 positionAndAdjustForCrossingHandles(offset); 4824 return; 4825 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4826 // We've just moved past the boundary so update the position. After this we can 4827 // figure out if the user is expanding or shrinking to go by word or character. 4828 positionAndAdjustForCrossingHandles(offset); 4829 mTouchWordDelta = 0.0f; 4830 mLanguageDirectionChanged = false; 4831 return; 4832 } 4833 4834 boolean isExpanding; 4835 final float xDiff = x - mPrevX; 4836 if (isStartHandle()) { 4837 isExpanding = currLine < mPreviousLineTouched; 4838 } else { 4839 isExpanding = currLine > mPreviousLineTouched; 4840 } 4841 if (atRtl == isStartHandle()) { 4842 isExpanding |= xDiff > 0; 4843 } else { 4844 isExpanding |= xDiff < 0; 4845 } 4846 4847 if (mTextView.getHorizontallyScrolling()) { 4848 if (positionNearEdgeOfScrollingView(x, atRtl) 4849 && ((isStartHandle() && mTextView.getScrollX() != 0) 4850 || (!isStartHandle() 4851 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4852 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4853 || (!isStartHandle() && offset > currentOffset))) 4854 || !isExpanding)) { 4855 // If we're expanding ensure that the offset is actually expanding compared to 4856 // the current offset, if the handle snapped to the word, the finger position 4857 // may be out of sync and we don't want the selection to jump back. 4858 mTouchWordDelta = 0.0f; 4859 final int nextOffset = (atRtl == isStartHandle()) 4860 ? layout.getOffsetToRightOf(mPreviousOffset) 4861 : layout.getOffsetToLeftOf(mPreviousOffset); 4862 positionAndAdjustForCrossingHandles(nextOffset); 4863 return; 4864 } 4865 } 4866 4867 if (isExpanding) { 4868 // User is increasing the selection. 4869 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4870 final boolean atLineBoundary = layout.getLineStart(currLine) == offset 4871 || layout.getLineEnd(currLine) == offset; 4872 final boolean atWordBoundary = getWordIteratorWithText().isBoundary(offset); 4873 final boolean snapToWord = !(atLineBoundary && atWordBoundary) 4874 && (!mInWord 4875 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4876 && atRtl == isAtRtlRun(layout, wordBoundary); 4877 if (snapToWord) { 4878 // Sometimes words can be broken across lines (Chinese, hyphenation). 4879 // We still snap to the word boundary but we only use the letters on the 4880 // current line to determine if the user is far enough into the word to snap. 4881 if (getLineForOffset(layout, wordBoundary) != currLine) { 4882 wordBoundary = isStartHandle() 4883 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4884 } 4885 final int offsetThresholdToSnap = isStartHandle() 4886 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4887 : wordStart + ((wordBoundary - wordStart) / 2); 4888 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 = wordStart; 4893 } else if (!isStartHandle() 4894 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4895 // User is far enough into the word or on a different line so we expand by 4896 // word. 4897 offset = wordEnd; 4898 } else { 4899 offset = mPreviousOffset; 4900 } 4901 } 4902 if ((isStartHandle() && offset < initialOffset) 4903 || (!isStartHandle() && offset > initialOffset)) { 4904 final float adjustedX = getHorizontal(layout, offset); 4905 mTouchWordDelta = 4906 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4907 } else { 4908 mTouchWordDelta = 0.0f; 4909 } 4910 positionCursor = true; 4911 } else { 4912 final int adjustedOffset = 4913 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4914 final boolean shrinking = isStartHandle() 4915 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4916 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4917 if (shrinking) { 4918 // User is shrinking the selection. 4919 if (currLine != mPrevLine) { 4920 // We're on a different line, so we'll snap to word boundaries. 4921 offset = isStartHandle() ? wordStart : wordEnd; 4922 if ((isStartHandle() && offset < initialOffset) 4923 || (!isStartHandle() && offset > initialOffset)) { 4924 final float adjustedX = getHorizontal(layout, offset); 4925 mTouchWordDelta = 4926 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4927 } else { 4928 mTouchWordDelta = 0.0f; 4929 } 4930 } else { 4931 offset = adjustedOffset; 4932 } 4933 positionCursor = true; 4934 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4935 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4936 // Handle has jumped to the word boundary, and the user is moving 4937 // their finger towards the handle, the delta should be updated. 4938 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4939 - getHorizontal(layout, mPreviousOffset); 4940 } 4941 } 4942 4943 if (positionCursor) { 4944 mPreviousLineTouched = currLine; 4945 positionAndAdjustForCrossingHandles(offset); 4946 } 4947 mPrevX = x; 4948 } 4949 4950 @Override 4951 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4952 super.positionAtCursorOffset(offset, forceUpdatePosition); 4953 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 4954 } 4955 4956 @Override 4957 public boolean onTouchEvent(MotionEvent event) { 4958 boolean superResult = super.onTouchEvent(event); 4959 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 4960 // Reset the touch word offset and x value when the user 4961 // re-engages the handle. 4962 mTouchWordDelta = 0.0f; 4963 mPrevX = UNSET_X_VALUE; 4964 } 4965 return superResult; 4966 } 4967 4968 private void positionAndAdjustForCrossingHandles(int offset) { 4969 final int anotherHandleOffset = 4970 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4971 if ((isStartHandle() && offset >= anotherHandleOffset) 4972 || (!isStartHandle() && offset <= anotherHandleOffset)) { 4973 mTouchWordDelta = 0.0f; 4974 final Layout layout = mTextView.getLayout(); 4975 if (layout != null && offset != anotherHandleOffset) { 4976 final float horiz = getHorizontal(layout, offset); 4977 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 4978 !isStartHandle()); 4979 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 4980 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 4981 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 4982 // This handle passes another one as it crossed a direction boundary. 4983 // Don't minimize the selection, but keep the handle at the run boundary. 4984 final int currentOffset = getCurrentCursorOffset(); 4985 final int offsetToGetRunRange = isStartHandle() 4986 ? currentOffset : Math.max(currentOffset - 1, 0); 4987 final long range = layout.getRunRange(offsetToGetRunRange); 4988 if (isStartHandle()) { 4989 offset = TextUtils.unpackRangeStartFromLong(range); 4990 } else { 4991 offset = TextUtils.unpackRangeEndFromLong(range); 4992 } 4993 positionAtCursorOffset(offset, false); 4994 return; 4995 } 4996 } 4997 // Handles can not cross and selection is at least one character. 4998 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 4999 } 5000 positionAtCursorOffset(offset, false); 5001 } 5002 5003 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5004 mTextView.getLocationOnScreen(mTextViewLocation); 5005 boolean nearEdge; 5006 if (atRtl == isStartHandle()) { 5007 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5008 - mTextView.getPaddingRight(); 5009 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5010 } else { 5011 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5012 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5013 } 5014 return nearEdge; 5015 } 5016 5017 @Override 5018 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5019 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5020 return layout.isRtlCharAt(offsetToCheck); 5021 } 5022 5023 @Override 5024 public float getHorizontal(@NonNull Layout layout, int offset) { 5025 return getHorizontal(layout, offset, isStartHandle()); 5026 } 5027 5028 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5029 final int line = getLineForOffset(layout, offset); 5030 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5031 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5032 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5033 return (isRtlChar == isRtlParagraph) 5034 ? layout.getPrimaryHorizontal(offset, false, startHandle) 5035 : layout.getSecondaryHorizontal(offset, false, startHandle); 5036 } 5037 5038 @Override 5039 public int getLineForOffset(@NonNull Layout layout, int offset) { 5040 return getLineForOffset(layout, offset, isStartHandle()); 5041 } 5042 5043 private int getLineForOffset(@NonNull Layout layout, int offset, boolean startHandle) { 5044 final int line = layout.getLineForOffset(offset); 5045 if (!startHandle && line > 0 && layout.getLineStart(line) == offset 5046 && mTextView.getText().charAt(offset - 1) != '\n') { 5047 // If end handle is at a line break in a paragraph, the handle should be at the 5048 // previous line. 5049 return line - 1; 5050 } 5051 return line; 5052 } 5053 5054 @Override 5055 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5056 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5057 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5058 if (!layout.isLevelBoundary(primaryOffset)) { 5059 return primaryOffset; 5060 } 5061 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5062 final int currentOffset = getCurrentCursorOffset(); 5063 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5064 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5065 if (primaryDiff < secondaryDiff) { 5066 return primaryOffset; 5067 } else if (primaryDiff > secondaryDiff) { 5068 return secondaryOffset; 5069 } else { 5070 final int offsetToCheck = isStartHandle() 5071 ? currentOffset : Math.max(currentOffset - 1, 0); 5072 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5073 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5074 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5075 } 5076 } 5077 } 5078 5079 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5080 final int trueLine = mTextView.getLineAtCoordinate(y); 5081 if (layout == null || prevLine > layout.getLineCount() 5082 || layout.getLineCount() <= 0 || prevLine < 0) { 5083 // Invalid parameters, just return whatever line is at y. 5084 return trueLine; 5085 } 5086 5087 if (Math.abs(trueLine - prevLine) >= 2) { 5088 // Only stick to lines if we're within a line of the previous selection. 5089 return trueLine; 5090 } 5091 5092 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5093 final int lineCount = layout.getLineCount(); 5094 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5095 5096 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5097 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5098 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5099 5100 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5101 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5102 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5103 5104 // Determine if we've moved lines based on y position and previous line. 5105 int currLine; 5106 if (y <= yTopBound) { 5107 currLine = Math.max(prevLine - 1, 0); 5108 } else if (y >= yBottomBound) { 5109 currLine = Math.min(prevLine + 1, lineCount - 1); 5110 } else { 5111 currLine = prevLine; 5112 } 5113 return currLine; 5114 } 5115 5116 /** 5117 * A CursorController instance can be used to control a cursor in the text. 5118 */ 5119 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5120 /** 5121 * Makes the cursor controller visible on screen. 5122 * See also {@link #hide()}. 5123 */ 5124 public void show(); 5125 5126 /** 5127 * Hide the cursor controller from screen. 5128 * See also {@link #show()}. 5129 */ 5130 public void hide(); 5131 5132 /** 5133 * Called when the view is detached from window. Perform house keeping task, such as 5134 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5135 * preventing the activity from being recycled. 5136 */ 5137 public void onDetached(); 5138 5139 public boolean isCursorBeingModified(); 5140 5141 public boolean isActive(); 5142 } 5143 5144 private class InsertionPointCursorController implements CursorController { 5145 private InsertionHandleView mHandle; 5146 5147 public void show() { 5148 getHandle().show(); 5149 5150 if (mSelectionModifierCursorController != null) { 5151 mSelectionModifierCursorController.hide(); 5152 } 5153 } 5154 5155 public void hide() { 5156 if (mHandle != null) { 5157 mHandle.hide(); 5158 } 5159 } 5160 5161 public void onTouchModeChanged(boolean isInTouchMode) { 5162 if (!isInTouchMode) { 5163 hide(); 5164 } 5165 } 5166 5167 private InsertionHandleView getHandle() { 5168 if (mSelectHandleCenter == null) { 5169 mSelectHandleCenter = mTextView.getContext().getDrawable( 5170 mTextView.mTextSelectHandleRes); 5171 } 5172 if (mHandle == null) { 5173 mHandle = new InsertionHandleView(mSelectHandleCenter); 5174 } 5175 return mHandle; 5176 } 5177 5178 @Override 5179 public void onDetached() { 5180 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5181 observer.removeOnTouchModeChangeListener(this); 5182 5183 if (mHandle != null) mHandle.onDetached(); 5184 } 5185 5186 @Override 5187 public boolean isCursorBeingModified() { 5188 return mHandle != null && mHandle.isDragging(); 5189 } 5190 5191 @Override 5192 public boolean isActive() { 5193 return mHandle != null && mHandle.isShowing(); 5194 } 5195 5196 public void invalidateHandle() { 5197 if (mHandle != null) { 5198 mHandle.invalidate(); 5199 } 5200 } 5201 } 5202 5203 class SelectionModifierCursorController implements CursorController { 5204 // The cursor controller handles, lazily created when shown. 5205 private SelectionHandleView mStartHandle; 5206 private SelectionHandleView mEndHandle; 5207 // The offsets of that last touch down event. Remembered to start selection there. 5208 private int mMinTouchOffset, mMaxTouchOffset; 5209 5210 private float mDownPositionX, mDownPositionY; 5211 private boolean mGestureStayedInTapRegion; 5212 5213 // Where the user first starts the drag motion. 5214 private int mStartOffset = -1; 5215 5216 private boolean mHaventMovedEnoughToStartDrag; 5217 // The line that a selection happened most recently with the drag accelerator. 5218 private int mLineSelectionIsOn = -1; 5219 // Whether the drag accelerator has selected past the initial line. 5220 private boolean mSwitchedLines = false; 5221 5222 // Indicates the drag accelerator mode that the user is currently using. 5223 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5224 // Drag accelerator is inactive. 5225 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5226 // Character based selection by dragging. Only for mouse. 5227 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5228 // Word based selection by dragging. Enabled after long pressing or double tapping. 5229 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5230 // Paragraph based selection by dragging. Enabled after mouse triple click. 5231 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5232 5233 SelectionModifierCursorController() { 5234 resetTouchOffsets(); 5235 } 5236 5237 public void show() { 5238 if (mTextView.isInBatchEditMode()) { 5239 return; 5240 } 5241 initDrawables(); 5242 initHandles(); 5243 } 5244 5245 private void initDrawables() { 5246 if (mSelectHandleLeft == null) { 5247 mSelectHandleLeft = mTextView.getContext().getDrawable( 5248 mTextView.mTextSelectHandleLeftRes); 5249 } 5250 if (mSelectHandleRight == null) { 5251 mSelectHandleRight = mTextView.getContext().getDrawable( 5252 mTextView.mTextSelectHandleRightRes); 5253 } 5254 } 5255 5256 private void initHandles() { 5257 // Lazy object creation has to be done before updatePosition() is called. 5258 if (mStartHandle == null) { 5259 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5260 com.android.internal.R.id.selection_start_handle, 5261 HANDLE_TYPE_SELECTION_START); 5262 } 5263 if (mEndHandle == null) { 5264 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5265 com.android.internal.R.id.selection_end_handle, 5266 HANDLE_TYPE_SELECTION_END); 5267 } 5268 5269 mStartHandle.show(); 5270 mEndHandle.show(); 5271 5272 hideInsertionPointCursorController(); 5273 } 5274 5275 public void hide() { 5276 if (mStartHandle != null) mStartHandle.hide(); 5277 if (mEndHandle != null) mEndHandle.hide(); 5278 } 5279 5280 public void enterDrag(int dragAcceleratorMode) { 5281 // Just need to init the handles / hide insertion cursor. 5282 show(); 5283 mDragAcceleratorMode = dragAcceleratorMode; 5284 // Start location of selection. 5285 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5286 mLastDownPositionY); 5287 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5288 // Don't show the handles until user has lifted finger. 5289 hide(); 5290 5291 // This stops scrolling parents from intercepting the touch event, allowing 5292 // the user to continue dragging across the screen to select text; TextView will 5293 // scroll as necessary. 5294 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5295 mTextView.cancelLongPress(); 5296 } 5297 5298 public void onTouchEvent(MotionEvent event) { 5299 // This is done even when the View does not have focus, so that long presses can start 5300 // selection and tap can move cursor from this tap position. 5301 final float eventX = event.getX(); 5302 final float eventY = event.getY(); 5303 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5304 switch (event.getActionMasked()) { 5305 case MotionEvent.ACTION_DOWN: 5306 if (extractedTextModeWillBeStarted()) { 5307 // Prevent duplicating the selection handles until the mode starts. 5308 hide(); 5309 } else { 5310 // Remember finger down position, to be able to start selection from there. 5311 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5312 eventX, eventY); 5313 5314 // Double tap detection 5315 if (mGestureStayedInTapRegion) { 5316 if (mTapState == TAP_STATE_DOUBLE_TAP 5317 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5318 final float deltaX = eventX - mDownPositionX; 5319 final float deltaY = eventY - mDownPositionY; 5320 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5321 5322 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5323 mTextView.getContext()); 5324 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5325 boolean stayedInArea = 5326 distanceSquared < doubleTapSlop * doubleTapSlop; 5327 5328 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5329 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5330 selectCurrentWordAndStartDrag(); 5331 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5332 selectCurrentParagraphAndStartDrag(); 5333 } 5334 mDiscardNextActionUp = true; 5335 } 5336 } 5337 } 5338 5339 mDownPositionX = eventX; 5340 mDownPositionY = eventY; 5341 mGestureStayedInTapRegion = true; 5342 mHaventMovedEnoughToStartDrag = true; 5343 } 5344 break; 5345 5346 case MotionEvent.ACTION_POINTER_DOWN: 5347 case MotionEvent.ACTION_POINTER_UP: 5348 // Handle multi-point gestures. Keep min and max offset positions. 5349 // Only activated for devices that correctly handle multi-touch. 5350 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5351 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5352 updateMinAndMaxOffsets(event); 5353 } 5354 break; 5355 5356 case MotionEvent.ACTION_MOVE: 5357 final ViewConfiguration viewConfig = ViewConfiguration.get( 5358 mTextView.getContext()); 5359 final int touchSlop = viewConfig.getScaledTouchSlop(); 5360 5361 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5362 final float deltaX = eventX - mDownPositionX; 5363 final float deltaY = eventY - mDownPositionY; 5364 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5365 5366 if (mGestureStayedInTapRegion) { 5367 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5368 mGestureStayedInTapRegion = 5369 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5370 } 5371 if (mHaventMovedEnoughToStartDrag) { 5372 // We don't start dragging until the user has moved enough. 5373 mHaventMovedEnoughToStartDrag = 5374 distanceSquared <= touchSlop * touchSlop; 5375 } 5376 } 5377 5378 if (isMouse && !isDragAcceleratorActive()) { 5379 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5380 if (mTextView.hasSelection() 5381 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5382 && offset >= mTextView.getSelectionStart() 5383 && offset <= mTextView.getSelectionEnd()) { 5384 startDragAndDrop(); 5385 break; 5386 } 5387 5388 if (mStartOffset != offset) { 5389 // Start character based drag accelerator. 5390 stopTextActionMode(); 5391 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5392 mDiscardNextActionUp = true; 5393 mHaventMovedEnoughToStartDrag = false; 5394 } 5395 } 5396 5397 if (mStartHandle != null && mStartHandle.isShowing()) { 5398 // Don't do the drag if the handles are showing already. 5399 break; 5400 } 5401 5402 updateSelection(event); 5403 break; 5404 5405 case MotionEvent.ACTION_UP: 5406 if (!isDragAcceleratorActive()) { 5407 break; 5408 } 5409 updateSelection(event); 5410 5411 // No longer dragging to select text, let the parent intercept events. 5412 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5413 5414 // No longer the first dragging motion, reset. 5415 resetDragAcceleratorState(); 5416 5417 if (mTextView.hasSelection()) { 5418 // Do not invoke the text assistant if this was a drag selection. 5419 startSelectionActionMode( 5420 mHaventMovedEnoughToStartDrag ? getTextClassifierInfo(true) : null); 5421 } 5422 break; 5423 } 5424 } 5425 5426 private void updateSelection(MotionEvent event) { 5427 if (mTextView.getLayout() != null) { 5428 switch (mDragAcceleratorMode) { 5429 case DRAG_ACCELERATOR_MODE_CHARACTER: 5430 updateCharacterBasedSelection(event); 5431 break; 5432 case DRAG_ACCELERATOR_MODE_WORD: 5433 updateWordBasedSelection(event); 5434 break; 5435 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5436 updateParagraphBasedSelection(event); 5437 break; 5438 } 5439 } 5440 } 5441 5442 /** 5443 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5444 * 5445 * @return true if the drag was started. 5446 */ 5447 private boolean selectCurrentParagraphAndStartDrag() { 5448 if (mInsertionActionModeRunnable != null) { 5449 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5450 } 5451 stopTextActionMode(); 5452 if (!selectCurrentParagraph()) { 5453 return false; 5454 } 5455 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5456 return true; 5457 } 5458 5459 private void updateCharacterBasedSelection(MotionEvent event) { 5460 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5461 Selection.setSelection((Spannable) mTextView.getText(), mStartOffset, offset); 5462 } 5463 5464 private void updateWordBasedSelection(MotionEvent event) { 5465 if (mHaventMovedEnoughToStartDrag) { 5466 return; 5467 } 5468 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5469 final ViewConfiguration viewConfig = ViewConfiguration.get( 5470 mTextView.getContext()); 5471 final float eventX = event.getX(); 5472 final float eventY = event.getY(); 5473 final int currLine; 5474 if (isMouse) { 5475 // No need to offset the y coordinate for mouse input. 5476 currLine = mTextView.getLineAtCoordinate(eventY); 5477 } else { 5478 float y = eventY; 5479 if (mSwitchedLines) { 5480 // Offset the finger by the same vertical offset as the handles. 5481 // This improves visibility of the content being selected by 5482 // shifting the finger below the content, this is applied once 5483 // the user has switched lines. 5484 final int touchSlop = viewConfig.getScaledTouchSlop(); 5485 final float fingerOffset = (mStartHandle != null) 5486 ? mStartHandle.getIdealVerticalOffset() 5487 : touchSlop; 5488 y = eventY - fingerOffset; 5489 } 5490 5491 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5492 y); 5493 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5494 // Break early here, we want to offset the finger position from 5495 // the selection highlight, once the user moved their finger 5496 // to a different line we should apply the offset and *not* switch 5497 // lines until recomputing the position with the finger offset. 5498 mSwitchedLines = true; 5499 return; 5500 } 5501 } 5502 5503 int startOffset; 5504 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5505 // Snap to word boundaries. 5506 if (mStartOffset < offset) { 5507 // Expanding with end handle. 5508 offset = getWordEnd(offset); 5509 startOffset = getWordStart(mStartOffset); 5510 } else { 5511 // Expanding with start handle. 5512 offset = getWordStart(offset); 5513 startOffset = getWordEnd(mStartOffset); 5514 if (startOffset == offset) { 5515 offset = getNextCursorOffset(offset, false); 5516 } 5517 } 5518 mLineSelectionIsOn = currLine; 5519 Selection.setSelection((Spannable) mTextView.getText(), startOffset, offset); 5520 } 5521 5522 private void updateParagraphBasedSelection(MotionEvent event) { 5523 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5524 5525 final int start = Math.min(offset, mStartOffset); 5526 final int end = Math.max(offset, mStartOffset); 5527 final long paragraphsRange = getParagraphsRange(start, end); 5528 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5529 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5530 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5531 } 5532 5533 /** 5534 * @param event 5535 */ 5536 private void updateMinAndMaxOffsets(MotionEvent event) { 5537 int pointerCount = event.getPointerCount(); 5538 for (int index = 0; index < pointerCount; index++) { 5539 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5540 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5541 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5542 } 5543 } 5544 5545 public int getMinTouchOffset() { 5546 return mMinTouchOffset; 5547 } 5548 5549 public int getMaxTouchOffset() { 5550 return mMaxTouchOffset; 5551 } 5552 5553 public void resetTouchOffsets() { 5554 mMinTouchOffset = mMaxTouchOffset = -1; 5555 resetDragAcceleratorState(); 5556 } 5557 5558 private void resetDragAcceleratorState() { 5559 mStartOffset = -1; 5560 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5561 mSwitchedLines = false; 5562 final int selectionStart = mTextView.getSelectionStart(); 5563 final int selectionEnd = mTextView.getSelectionEnd(); 5564 if (selectionStart > selectionEnd) { 5565 Selection.setSelection((Spannable) mTextView.getText(), 5566 selectionEnd, selectionStart); 5567 } 5568 } 5569 5570 /** 5571 * @return true iff this controller is currently used to move the selection start. 5572 */ 5573 public boolean isSelectionStartDragged() { 5574 return mStartHandle != null && mStartHandle.isDragging(); 5575 } 5576 5577 @Override 5578 public boolean isCursorBeingModified() { 5579 return isDragAcceleratorActive() || isSelectionStartDragged() 5580 || (mEndHandle != null && mEndHandle.isDragging()); 5581 } 5582 5583 /** 5584 * @return true if the user is selecting text using the drag accelerator. 5585 */ 5586 public boolean isDragAcceleratorActive() { 5587 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5588 } 5589 5590 public void onTouchModeChanged(boolean isInTouchMode) { 5591 if (!isInTouchMode) { 5592 hide(); 5593 } 5594 } 5595 5596 @Override 5597 public void onDetached() { 5598 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5599 observer.removeOnTouchModeChangeListener(this); 5600 5601 if (mStartHandle != null) mStartHandle.onDetached(); 5602 if (mEndHandle != null) mEndHandle.onDetached(); 5603 } 5604 5605 @Override 5606 public boolean isActive() { 5607 return mStartHandle != null && mStartHandle.isShowing(); 5608 } 5609 5610 public void invalidateHandles() { 5611 if (mStartHandle != null) { 5612 mStartHandle.invalidate(); 5613 } 5614 if (mEndHandle != null) { 5615 mEndHandle.invalidate(); 5616 } 5617 } 5618 } 5619 5620 private class CorrectionHighlighter { 5621 private final Path mPath = new Path(); 5622 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5623 private int mStart, mEnd; 5624 private long mFadingStartTime; 5625 private RectF mTempRectF; 5626 private static final int FADE_OUT_DURATION = 400; 5627 5628 public CorrectionHighlighter() { 5629 mPaint.setCompatibilityScaling( 5630 mTextView.getResources().getCompatibilityInfo().applicationScale); 5631 mPaint.setStyle(Paint.Style.FILL); 5632 } 5633 5634 public void highlight(CorrectionInfo info) { 5635 mStart = info.getOffset(); 5636 mEnd = mStart + info.getNewText().length(); 5637 mFadingStartTime = SystemClock.uptimeMillis(); 5638 5639 if (mStart < 0 || mEnd < 0) { 5640 stopAnimation(); 5641 } 5642 } 5643 5644 public void draw(Canvas canvas, int cursorOffsetVertical) { 5645 if (updatePath() && updatePaint()) { 5646 if (cursorOffsetVertical != 0) { 5647 canvas.translate(0, cursorOffsetVertical); 5648 } 5649 5650 canvas.drawPath(mPath, mPaint); 5651 5652 if (cursorOffsetVertical != 0) { 5653 canvas.translate(0, -cursorOffsetVertical); 5654 } 5655 invalidate(true); // TODO invalidate cursor region only 5656 } else { 5657 stopAnimation(); 5658 invalidate(false); // TODO invalidate cursor region only 5659 } 5660 } 5661 5662 private boolean updatePaint() { 5663 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5664 if (duration > FADE_OUT_DURATION) return false; 5665 5666 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5667 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5668 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5669 + ((int) (highlightColorAlpha * coef) << 24); 5670 mPaint.setColor(color); 5671 return true; 5672 } 5673 5674 private boolean updatePath() { 5675 final Layout layout = mTextView.getLayout(); 5676 if (layout == null) return false; 5677 5678 // Update in case text is edited while the animation is run 5679 final int length = mTextView.getText().length(); 5680 int start = Math.min(length, mStart); 5681 int end = Math.min(length, mEnd); 5682 5683 mPath.reset(); 5684 layout.getSelectionPath(start, end, mPath); 5685 return true; 5686 } 5687 5688 private void invalidate(boolean delayed) { 5689 if (mTextView.getLayout() == null) return; 5690 5691 if (mTempRectF == null) mTempRectF = new RectF(); 5692 mPath.computeBounds(mTempRectF, false); 5693 5694 int left = mTextView.getCompoundPaddingLeft(); 5695 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5696 5697 if (delayed) { 5698 mTextView.postInvalidateOnAnimation( 5699 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5700 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5701 } else { 5702 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5703 (int) mTempRectF.right, (int) mTempRectF.bottom); 5704 } 5705 } 5706 5707 private void stopAnimation() { 5708 Editor.this.mCorrectionHighlighter = null; 5709 } 5710 } 5711 5712 private static class ErrorPopup extends PopupWindow { 5713 private boolean mAbove = false; 5714 private final TextView mView; 5715 private int mPopupInlineErrorBackgroundId = 0; 5716 private int mPopupInlineErrorAboveBackgroundId = 0; 5717 5718 ErrorPopup(TextView v, int width, int height) { 5719 super(v, width, height); 5720 mView = v; 5721 // Make sure the TextView has a background set as it will be used the first time it is 5722 // shown and positioned. Initialized with below background, which should have 5723 // dimensions identical to the above version for this to work (and is more likely). 5724 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5725 com.android.internal.R.styleable.Theme_errorMessageBackground); 5726 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5727 } 5728 5729 void fixDirection(boolean above) { 5730 mAbove = above; 5731 5732 if (above) { 5733 mPopupInlineErrorAboveBackgroundId = 5734 getResourceId(mPopupInlineErrorAboveBackgroundId, 5735 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5736 } else { 5737 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5738 com.android.internal.R.styleable.Theme_errorMessageBackground); 5739 } 5740 5741 mView.setBackgroundResource( 5742 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5743 } 5744 5745 private int getResourceId(int currentId, int index) { 5746 if (currentId == 0) { 5747 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5748 R.styleable.Theme); 5749 currentId = styledAttributes.getResourceId(index, 0); 5750 styledAttributes.recycle(); 5751 } 5752 return currentId; 5753 } 5754 5755 @Override 5756 public void update(int x, int y, int w, int h, boolean force) { 5757 super.update(x, y, w, h, force); 5758 5759 boolean above = isAboveAnchor(); 5760 if (above != mAbove) { 5761 fixDirection(above); 5762 } 5763 } 5764 } 5765 5766 static class InputContentType { 5767 int imeOptions = EditorInfo.IME_NULL; 5768 String privateImeOptions; 5769 CharSequence imeActionLabel; 5770 int imeActionId; 5771 Bundle extras; 5772 OnEditorActionListener onEditorActionListener; 5773 boolean enterDown; 5774 LocaleList imeHintLocales; 5775 } 5776 5777 static class InputMethodState { 5778 ExtractedTextRequest mExtractedTextRequest; 5779 final ExtractedText mExtractedText = new ExtractedText(); 5780 int mBatchEditNesting; 5781 boolean mCursorChanged; 5782 boolean mSelectionModeChanged; 5783 boolean mContentChanged; 5784 int mChangedStart, mChangedEnd, mChangedDelta; 5785 } 5786 5787 /** 5788 * @return True iff (start, end) is a valid range within the text. 5789 */ 5790 private static boolean isValidRange(CharSequence text, int start, int end) { 5791 return 0 <= start && start <= end && end <= text.length(); 5792 } 5793 5794 @VisibleForTesting 5795 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5796 return mSuggestionsPopupWindow; 5797 } 5798 5799 /** 5800 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5801 * text being typed (and hence always returns null from the filter() method). 5802 * 5803 * TODO: Make this span aware. 5804 */ 5805 public static class UndoInputFilter implements InputFilter { 5806 private final Editor mEditor; 5807 5808 // Whether the current filter pass is directly caused by an end-user text edit. 5809 private boolean mIsUserEdit; 5810 5811 // Whether the text field is handling an IME composition. Must be parceled in case the user 5812 // rotates the screen during composition. 5813 private boolean mHasComposition; 5814 5815 // Whether the user is expanding or shortening the text 5816 private boolean mExpanding; 5817 5818 // Whether the previous edit operation was in the current batch edit. 5819 private boolean mPreviousOperationWasInSameBatchEdit; 5820 5821 public UndoInputFilter(Editor editor) { 5822 mEditor = editor; 5823 } 5824 5825 public void saveInstanceState(Parcel parcel) { 5826 parcel.writeInt(mIsUserEdit ? 1 : 0); 5827 parcel.writeInt(mHasComposition ? 1 : 0); 5828 parcel.writeInt(mExpanding ? 1 : 0); 5829 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5830 } 5831 5832 public void restoreInstanceState(Parcel parcel) { 5833 mIsUserEdit = parcel.readInt() != 0; 5834 mHasComposition = parcel.readInt() != 0; 5835 mExpanding = parcel.readInt() != 0; 5836 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5837 } 5838 5839 /** 5840 * Signals that a user-triggered edit is starting. 5841 */ 5842 public void beginBatchEdit() { 5843 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5844 mIsUserEdit = true; 5845 } 5846 5847 public void endBatchEdit() { 5848 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5849 mIsUserEdit = false; 5850 mPreviousOperationWasInSameBatchEdit = false; 5851 } 5852 5853 @Override 5854 public CharSequence filter(CharSequence source, int start, int end, 5855 Spanned dest, int dstart, int dend) { 5856 if (DEBUG_UNDO) { 5857 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 5858 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5859 } 5860 5861 // Check to see if this edit should be tracked for undo. 5862 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5863 return null; 5864 } 5865 5866 final boolean hadComposition = mHasComposition; 5867 mHasComposition = isComposition(source); 5868 final boolean wasExpanding = mExpanding; 5869 boolean shouldCreateSeparateState = false; 5870 if ((end - start) != (dend - dstart)) { 5871 mExpanding = (end - start) > (dend - dstart); 5872 if (hadComposition && mExpanding != wasExpanding) { 5873 shouldCreateSeparateState = true; 5874 } 5875 } 5876 5877 // Handle edit. 5878 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5879 return null; 5880 } 5881 5882 void freezeLastEdit() { 5883 mEditor.mUndoManager.beginUpdate("Edit text"); 5884 EditOperation lastEdit = getLastEdit(); 5885 if (lastEdit != null) { 5886 lastEdit.mFrozen = true; 5887 } 5888 mEditor.mUndoManager.endUpdate(); 5889 } 5890 5891 @Retention(RetentionPolicy.SOURCE) 5892 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5893 private @interface MergeMode {} 5894 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5895 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5896 /** Use {@link EditOperation#mergeWith} to merge */ 5897 private static final int MERGE_EDIT_MODE_NORMAL = 2; 5898 5899 private void handleEdit(CharSequence source, int start, int end, 5900 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5901 // An application may install a TextWatcher to provide additional modifications after 5902 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5903 // string). This results in multiple filter() calls for what the user considers to be 5904 // a single operation. Always undo the whole set of changes in one step. 5905 @MergeMode 5906 final int mergeMode; 5907 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5908 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5909 } else if (shouldCreateSeparateState) { 5910 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5911 } else { 5912 mergeMode = MERGE_EDIT_MODE_NORMAL; 5913 } 5914 // Build a new operation with all the information from this edit. 5915 String newText = TextUtils.substring(source, start, end); 5916 String oldText = TextUtils.substring(dest, dstart, dend); 5917 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5918 mHasComposition); 5919 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5920 return; 5921 } 5922 recordEdit(edit, mergeMode); 5923 } 5924 5925 private EditOperation getLastEdit() { 5926 final UndoManager um = mEditor.mUndoManager; 5927 return um.getLastOperation( 5928 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5929 } 5930 /** 5931 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5932 * If forceMerge is true then the new edit is always merged. 5933 */ 5934 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5935 // Fetch the last edit operation and attempt to merge in the new edit. 5936 final UndoManager um = mEditor.mUndoManager; 5937 um.beginUpdate("Edit text"); 5938 EditOperation lastEdit = getLastEdit(); 5939 if (lastEdit == null) { 5940 // Add this as the first edit. 5941 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5942 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5943 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5944 // Forced merges take priority because they could be the result of a non-user-edit 5945 // change and this case should not create a new undo operation. 5946 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5947 lastEdit.forceMergeWith(edit); 5948 } else if (!mIsUserEdit) { 5949 // An application directly modified the Editable outside of a text edit. Treat this 5950 // as a new change and don't attempt to merge. 5951 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5952 um.commitState(mEditor.mUndoOwner); 5953 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5954 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 5955 // Merge succeeded, nothing else to do. 5956 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5957 } else { 5958 // Could not merge with the last edit, so commit the last edit and add this edit. 5959 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5960 um.commitState(mEditor.mUndoOwner); 5961 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5962 } 5963 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 5964 um.endUpdate(); 5965 } 5966 5967 private boolean canUndoEdit(CharSequence source, int start, int end, 5968 Spanned dest, int dstart, int dend) { 5969 if (!mEditor.mAllowUndo) { 5970 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5971 return false; 5972 } 5973 5974 if (mEditor.mUndoManager.isInUndo()) { 5975 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5976 return false; 5977 } 5978 5979 // Text filters run before input operations are applied. However, some input operations 5980 // are invalid and will throw exceptions when applied. This is common in tests. Don't 5981 // attempt to undo invalid operations. 5982 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 5983 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 5984 return false; 5985 } 5986 5987 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 5988 // on an input field. Skip no-op changes. 5989 if (start == end && dstart == dend) { 5990 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 5991 return false; 5992 } 5993 5994 return true; 5995 } 5996 5997 private static boolean isComposition(CharSequence source) { 5998 if (!(source instanceof Spannable)) { 5999 return false; 6000 } 6001 // This is a composition edit if the source has a non-zero-length composing span. 6002 Spannable text = (Spannable) source; 6003 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6004 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6005 return composeBegin < composeEnd; 6006 } 6007 6008 private boolean isInTextWatcher() { 6009 CharSequence text = mEditor.mTextView.getText(); 6010 return (text instanceof SpannableStringBuilder) 6011 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6012 } 6013 } 6014 6015 /** 6016 * An operation to undo a single "edit" to a text view. 6017 */ 6018 public static class EditOperation extends UndoOperation<Editor> { 6019 private static final int TYPE_INSERT = 0; 6020 private static final int TYPE_DELETE = 1; 6021 private static final int TYPE_REPLACE = 2; 6022 6023 private int mType; 6024 private String mOldText; 6025 private String mNewText; 6026 private int mStart; 6027 6028 private int mOldCursorPos; 6029 private int mNewCursorPos; 6030 private boolean mFrozen; 6031 private boolean mIsComposition; 6032 6033 /** 6034 * Constructs an edit operation from a text input operation on editor that replaces the 6035 * oldText starting at dstart with newText. 6036 */ 6037 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6038 boolean isComposition) { 6039 super(editor.mUndoOwner); 6040 mOldText = oldText; 6041 mNewText = newText; 6042 6043 // Determine the type of the edit. 6044 if (mNewText.length() > 0 && mOldText.length() == 0) { 6045 mType = TYPE_INSERT; 6046 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6047 mType = TYPE_DELETE; 6048 } else { 6049 mType = TYPE_REPLACE; 6050 } 6051 6052 mStart = dstart; 6053 // Store cursor data. 6054 mOldCursorPos = editor.mTextView.getSelectionStart(); 6055 mNewCursorPos = dstart + mNewText.length(); 6056 mIsComposition = isComposition; 6057 } 6058 6059 public EditOperation(Parcel src, ClassLoader loader) { 6060 super(src, loader); 6061 mType = src.readInt(); 6062 mOldText = src.readString(); 6063 mNewText = src.readString(); 6064 mStart = src.readInt(); 6065 mOldCursorPos = src.readInt(); 6066 mNewCursorPos = src.readInt(); 6067 mFrozen = src.readInt() == 1; 6068 mIsComposition = src.readInt() == 1; 6069 } 6070 6071 @Override 6072 public void writeToParcel(Parcel dest, int flags) { 6073 dest.writeInt(mType); 6074 dest.writeString(mOldText); 6075 dest.writeString(mNewText); 6076 dest.writeInt(mStart); 6077 dest.writeInt(mOldCursorPos); 6078 dest.writeInt(mNewCursorPos); 6079 dest.writeInt(mFrozen ? 1 : 0); 6080 dest.writeInt(mIsComposition ? 1 : 0); 6081 } 6082 6083 private int getNewTextEnd() { 6084 return mStart + mNewText.length(); 6085 } 6086 6087 private int getOldTextEnd() { 6088 return mStart + mOldText.length(); 6089 } 6090 6091 @Override 6092 public void commit() { 6093 } 6094 6095 @Override 6096 public void undo() { 6097 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6098 // Remove the new text and insert the old. 6099 Editor editor = getOwnerData(); 6100 Editable text = (Editable) editor.mTextView.getText(); 6101 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6102 } 6103 6104 @Override 6105 public void redo() { 6106 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6107 // Remove the old text and insert the new. 6108 Editor editor = getOwnerData(); 6109 Editable text = (Editable) editor.mTextView.getText(); 6110 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6111 } 6112 6113 /** 6114 * Attempts to merge this existing operation with a new edit. 6115 * @param edit The new edit operation. 6116 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6117 * object unchanged. 6118 */ 6119 private boolean mergeWith(EditOperation edit) { 6120 if (DEBUG_UNDO) { 6121 Log.d(TAG, "mergeWith old " + this); 6122 Log.d(TAG, "mergeWith new " + edit); 6123 } 6124 6125 if (mFrozen) { 6126 return false; 6127 } 6128 6129 switch (mType) { 6130 case TYPE_INSERT: 6131 return mergeInsertWith(edit); 6132 case TYPE_DELETE: 6133 return mergeDeleteWith(edit); 6134 case TYPE_REPLACE: 6135 return mergeReplaceWith(edit); 6136 default: 6137 return false; 6138 } 6139 } 6140 6141 private boolean mergeInsertWith(EditOperation edit) { 6142 if (edit.mType == TYPE_INSERT) { 6143 // Merge insertions that are contiguous even when it's frozen. 6144 if (getNewTextEnd() != edit.mStart) { 6145 return false; 6146 } 6147 mNewText += edit.mNewText; 6148 mNewCursorPos = edit.mNewCursorPos; 6149 mFrozen = edit.mFrozen; 6150 mIsComposition = edit.mIsComposition; 6151 return true; 6152 } 6153 if (mIsComposition && edit.mType == TYPE_REPLACE 6154 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6155 // Merge insertion with replace as they can be single insertion. 6156 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6157 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6158 mNewCursorPos = edit.mNewCursorPos; 6159 mIsComposition = edit.mIsComposition; 6160 return true; 6161 } 6162 return false; 6163 } 6164 6165 // TODO: Support forward delete. 6166 private boolean mergeDeleteWith(EditOperation edit) { 6167 // Only merge continuous deletes. 6168 if (edit.mType != TYPE_DELETE) { 6169 return false; 6170 } 6171 // Only merge deletions that are contiguous. 6172 if (mStart != edit.getOldTextEnd()) { 6173 return false; 6174 } 6175 mStart = edit.mStart; 6176 mOldText = edit.mOldText + mOldText; 6177 mNewCursorPos = edit.mNewCursorPos; 6178 mIsComposition = edit.mIsComposition; 6179 return true; 6180 } 6181 6182 private boolean mergeReplaceWith(EditOperation edit) { 6183 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6184 // Merge with adjacent insert. 6185 mNewText += edit.mNewText; 6186 mNewCursorPos = edit.mNewCursorPos; 6187 return true; 6188 } 6189 if (!mIsComposition) { 6190 return false; 6191 } 6192 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6193 && getNewTextEnd() >= edit.getOldTextEnd()) { 6194 // Merge with delete as they can be single operation. 6195 mNewText = mNewText.substring(0, edit.mStart - mStart) 6196 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6197 if (mNewText.isEmpty()) { 6198 mType = TYPE_DELETE; 6199 } 6200 mNewCursorPos = edit.mNewCursorPos; 6201 mIsComposition = edit.mIsComposition; 6202 return true; 6203 } 6204 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6205 && TextUtils.equals(mNewText, edit.mOldText)) { 6206 // Merge with the replace that replaces the same region. 6207 mNewText = edit.mNewText; 6208 mNewCursorPos = edit.mNewCursorPos; 6209 mIsComposition = edit.mIsComposition; 6210 return true; 6211 } 6212 return false; 6213 } 6214 6215 /** 6216 * Forcibly creates a single merged edit operation by simulating the entire text 6217 * contents being replaced. 6218 */ 6219 public void forceMergeWith(EditOperation edit) { 6220 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6221 if (mergeWith(edit)) { 6222 return; 6223 } 6224 Editor editor = getOwnerData(); 6225 6226 // Copy the text of the current field. 6227 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6228 // but would require two parallel implementations of modifyText() because Editable and 6229 // StringBuilder do not share an interface for replace/delete/insert. 6230 Editable editable = (Editable) editor.mTextView.getText(); 6231 Editable originalText = new SpannableStringBuilder(editable.toString()); 6232 6233 // Roll back the last operation. 6234 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6235 6236 // Clone the text again and apply the new operation. 6237 Editable finalText = new SpannableStringBuilder(editable.toString()); 6238 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6239 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6240 6241 // Convert this operation into a replace operation. 6242 mType = TYPE_REPLACE; 6243 mNewText = finalText.toString(); 6244 mOldText = originalText.toString(); 6245 mStart = 0; 6246 mNewCursorPos = edit.mNewCursorPos; 6247 mIsComposition = edit.mIsComposition; 6248 // mOldCursorPos is unchanged. 6249 } 6250 6251 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6252 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6253 // Apply the edit if it is still valid. 6254 if (isValidRange(text, deleteFrom, deleteTo) 6255 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6256 if (deleteFrom != deleteTo) { 6257 text.delete(deleteFrom, deleteTo); 6258 } 6259 if (newText.length() != 0) { 6260 text.insert(newTextInsertAt, newText); 6261 } 6262 } 6263 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6264 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6265 // TODO: Select all the text that was undone. 6266 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6267 Selection.setSelection(text, newCursorPos); 6268 } 6269 } 6270 6271 private String getTypeString() { 6272 switch (mType) { 6273 case TYPE_INSERT: 6274 return "insert"; 6275 case TYPE_DELETE: 6276 return "delete"; 6277 case TYPE_REPLACE: 6278 return "replace"; 6279 default: 6280 return ""; 6281 } 6282 } 6283 6284 @Override 6285 public String toString() { 6286 return "[mType=" + getTypeString() + ", " 6287 + "mOldText=" + mOldText + ", " 6288 + "mNewText=" + mNewText + ", " 6289 + "mStart=" + mStart + ", " 6290 + "mOldCursorPos=" + mOldCursorPos + ", " 6291 + "mNewCursorPos=" + mNewCursorPos + ", " 6292 + "mFrozen=" + mFrozen + ", " 6293 + "mIsComposition=" + mIsComposition + "]"; 6294 } 6295 6296 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6297 new Parcelable.ClassLoaderCreator<EditOperation>() { 6298 @Override 6299 public EditOperation createFromParcel(Parcel in) { 6300 return new EditOperation(in, null); 6301 } 6302 6303 @Override 6304 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6305 return new EditOperation(in, loader); 6306 } 6307 6308 @Override 6309 public EditOperation[] newArray(int size) { 6310 return new EditOperation[size]; 6311 } 6312 }; 6313 } 6314 6315 /** 6316 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6317 * These allow external applications to plug into currently selected text. 6318 */ 6319 static final class ProcessTextIntentActionsHandler { 6320 6321 private final Editor mEditor; 6322 private final TextView mTextView; 6323 private final Context mContext; 6324 private final PackageManager mPackageManager; 6325 private final String mPackageName; 6326 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6327 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6328 new SparseArray<>(); 6329 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6330 6331 private ProcessTextIntentActionsHandler(Editor editor) { 6332 mEditor = Preconditions.checkNotNull(editor); 6333 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6334 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6335 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6336 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6337 } 6338 6339 /** 6340 * Adds "PROCESS_TEXT" menu items to the specified menu. 6341 */ 6342 public void onInitializeMenu(Menu menu) { 6343 int i = 0; 6344 loadSupportedActivities(); 6345 for (ResolveInfo resolveInfo : mSupportedActivities) { 6346 menu.add(Menu.NONE, Menu.NONE, 6347 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6348 getLabel(resolveInfo)) 6349 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6350 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6351 } 6352 } 6353 6354 /** 6355 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6356 * menu item. 6357 * 6358 * @return True if the action was performed, false otherwise. 6359 */ 6360 public boolean performMenuItemAction(MenuItem item) { 6361 return fireIntent(item.getIntent()); 6362 } 6363 6364 /** 6365 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6366 */ 6367 public void initializeAccessibilityActions() { 6368 mAccessibilityIntents.clear(); 6369 mAccessibilityActions.clear(); 6370 int i = 0; 6371 loadSupportedActivities(); 6372 for (ResolveInfo resolveInfo : mSupportedActivities) { 6373 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6374 mAccessibilityActions.put( 6375 actionId, 6376 new AccessibilityNodeInfo.AccessibilityAction( 6377 actionId, getLabel(resolveInfo))); 6378 mAccessibilityIntents.put( 6379 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6380 } 6381 } 6382 6383 /** 6384 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6385 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6386 * latest accessibility actions available for this call. 6387 */ 6388 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6389 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6390 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6391 } 6392 } 6393 6394 /** 6395 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6396 * accessibility action id. 6397 * 6398 * @return True if the action was performed, false otherwise. 6399 */ 6400 public boolean performAccessibilityAction(int actionId) { 6401 return fireIntent(mAccessibilityIntents.get(actionId)); 6402 } 6403 6404 private boolean fireIntent(Intent intent) { 6405 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6406 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 6407 mEditor.mPreserveSelection = true; 6408 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6409 return true; 6410 } 6411 return false; 6412 } 6413 6414 private void loadSupportedActivities() { 6415 mSupportedActivities.clear(); 6416 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6417 List<ResolveInfo> unfiltered = 6418 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6419 for (ResolveInfo info : unfiltered) { 6420 if (isSupportedActivity(info)) { 6421 mSupportedActivities.add(info); 6422 } 6423 } 6424 } 6425 6426 private boolean isSupportedActivity(ResolveInfo info) { 6427 return mPackageName.equals(info.activityInfo.packageName) 6428 || info.activityInfo.exported 6429 && (info.activityInfo.permission == null 6430 || mContext.checkSelfPermission(info.activityInfo.permission) 6431 == PackageManager.PERMISSION_GRANTED); 6432 } 6433 6434 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6435 return createProcessTextIntent() 6436 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6437 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6438 } 6439 6440 private Intent createProcessTextIntent() { 6441 return new Intent() 6442 .setAction(Intent.ACTION_PROCESS_TEXT) 6443 .setType("text/plain"); 6444 } 6445 6446 private CharSequence getLabel(ResolveInfo resolveInfo) { 6447 return resolveInfo.loadLabel(mPackageManager); 6448 } 6449 } 6450} 6451