Editor.java revision 9c13307c386a05ae288c965843c6edf47cbaa14f
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.IntDef; 21import android.annotation.NonNull; 22import android.annotation.Nullable; 23import android.app.PendingIntent; 24import android.app.PendingIntent.CanceledException; 25import android.content.ClipData; 26import android.content.ClipData.Item; 27import android.content.Context; 28import android.content.Intent; 29import android.content.UndoManager; 30import android.content.UndoOperation; 31import android.content.UndoOwner; 32import android.content.pm.PackageManager; 33import android.content.pm.ResolveInfo; 34import android.content.res.TypedArray; 35import android.graphics.Canvas; 36import android.graphics.Color; 37import android.graphics.Matrix; 38import android.graphics.Paint; 39import android.graphics.Path; 40import android.graphics.Rect; 41import android.graphics.RectF; 42import android.graphics.drawable.ColorDrawable; 43import android.graphics.drawable.Drawable; 44import android.metrics.LogMaker; 45import android.os.Bundle; 46import android.os.LocaleList; 47import android.os.Parcel; 48import android.os.Parcelable; 49import android.os.ParcelableParcel; 50import android.os.SystemClock; 51import android.provider.Settings; 52import android.text.DynamicLayout; 53import android.text.Editable; 54import android.text.InputFilter; 55import android.text.InputType; 56import android.text.Layout; 57import android.text.ParcelableSpan; 58import android.text.Selection; 59import android.text.SpanWatcher; 60import android.text.Spannable; 61import android.text.SpannableStringBuilder; 62import android.text.Spanned; 63import android.text.StaticLayout; 64import android.text.TextUtils; 65import android.text.method.KeyListener; 66import android.text.method.MetaKeyKeyListener; 67import android.text.method.MovementMethod; 68import android.text.method.WordIterator; 69import android.text.style.EasyEditSpan; 70import android.text.style.SuggestionRangeSpan; 71import android.text.style.SuggestionSpan; 72import android.text.style.TextAppearanceSpan; 73import android.text.style.URLSpan; 74import android.util.ArraySet; 75import android.util.DisplayMetrics; 76import android.util.Log; 77import android.util.SparseArray; 78import android.view.ActionMode; 79import android.view.ActionMode.Callback; 80import android.view.ContextMenu; 81import android.view.ContextThemeWrapper; 82import android.view.DisplayListCanvas; 83import android.view.DragAndDropPermissions; 84import android.view.DragEvent; 85import android.view.Gravity; 86import android.view.HapticFeedbackConstants; 87import android.view.InputDevice; 88import android.view.LayoutInflater; 89import android.view.Menu; 90import android.view.MenuItem; 91import android.view.MotionEvent; 92import android.view.RenderNode; 93import android.view.SubMenu; 94import android.view.View; 95import android.view.View.DragShadowBuilder; 96import android.view.View.OnClickListener; 97import android.view.ViewConfiguration; 98import android.view.ViewGroup; 99import android.view.ViewGroup.LayoutParams; 100import android.view.ViewTreeObserver; 101import android.view.WindowManager; 102import android.view.accessibility.AccessibilityNodeInfo; 103import android.view.inputmethod.CorrectionInfo; 104import android.view.inputmethod.CursorAnchorInfo; 105import android.view.inputmethod.EditorInfo; 106import android.view.inputmethod.ExtractedText; 107import android.view.inputmethod.ExtractedTextRequest; 108import android.view.inputmethod.InputConnection; 109import android.view.inputmethod.InputMethodManager; 110import android.view.textclassifier.TextClassification; 111import android.widget.AdapterView.OnItemClickListener; 112import android.widget.TextView.Drawables; 113import android.widget.TextView.OnEditorActionListener; 114 115import com.android.internal.annotations.VisibleForTesting; 116import com.android.internal.logging.MetricsLogger; 117import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 118import com.android.internal.util.ArrayUtils; 119import com.android.internal.util.GrowingArrayUtils; 120import com.android.internal.util.Preconditions; 121import com.android.internal.widget.EditableInputConnection; 122 123import java.lang.annotation.Retention; 124import java.lang.annotation.RetentionPolicy; 125import java.text.BreakIterator; 126import java.util.ArrayList; 127import java.util.Arrays; 128import java.util.Comparator; 129import java.util.HashMap; 130import java.util.List; 131 132 133/** 134 * Helper class used by TextView to handle editable text views. 135 * 136 * @hide 137 */ 138public class Editor { 139 private static final String TAG = "Editor"; 140 private static final boolean DEBUG_UNDO = false; 141 142 static final int BLINK = 500; 143 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 144 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 145 private static final int UNSET_X_VALUE = -1; 146 private static final int UNSET_LINE = -1; 147 // Tag used when the Editor maintains its own separate UndoManager. 148 private static final String UNDO_OWNER_TAG = "Editor"; 149 150 // Ordering constants used to place the Action Mode or context menu items in their menu. 151 private static final int MENU_ITEM_ORDER_ASSIST = 0; 152 private static final int MENU_ITEM_ORDER_UNDO = 2; 153 private static final int MENU_ITEM_ORDER_REDO = 3; 154 private static final int MENU_ITEM_ORDER_CUT = 4; 155 private static final int MENU_ITEM_ORDER_COPY = 5; 156 private static final int MENU_ITEM_ORDER_PASTE = 6; 157 private static final int MENU_ITEM_ORDER_SHARE = 7; 158 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 159 private static final int MENU_ITEM_ORDER_REPLACE = 9; 160 private static final int MENU_ITEM_ORDER_AUTOFILL = 10; 161 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 11; 162 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 163 164 // Each Editor manages its own undo stack. 165 private final UndoManager mUndoManager = new UndoManager(); 166 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 167 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 168 boolean mAllowUndo = true; 169 170 private final MetricsLogger mMetricsLogger = new MetricsLogger(); 171 172 // Cursor Controllers. 173 private InsertionPointCursorController mInsertionPointCursorController; 174 SelectionModifierCursorController mSelectionModifierCursorController; 175 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 176 private ActionMode mTextActionMode; 177 private boolean mInsertionControllerEnabled; 178 private boolean mSelectionControllerEnabled; 179 180 private final boolean mHapticTextHandleEnabled; 181 182 // Used to highlight a word when it is corrected by the IME 183 private CorrectionHighlighter mCorrectionHighlighter; 184 185 InputContentType mInputContentType; 186 InputMethodState mInputMethodState; 187 188 private static class TextRenderNode { 189 // Render node has 3 recording states: 190 // 1. Recorded operations are valid. 191 // #needsRecord() returns false, but needsToBeShifted is false. 192 // 2. Recorded operations are not valid, but just the position needed to be updated. 193 // #needsRecord() returns false, but needsToBeShifted is true. 194 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 195 // true. 196 RenderNode renderNode; 197 boolean isDirty; 198 // Becomes true when recorded operations can be reused, but the position has to be updated. 199 boolean needsToBeShifted; 200 public TextRenderNode(String name) { 201 renderNode = RenderNode.create(name, null); 202 isDirty = true; 203 needsToBeShifted = true; 204 } 205 boolean needsRecord() { 206 return isDirty || !renderNode.isValid(); 207 } 208 } 209 private TextRenderNode[] mTextRenderNodes; 210 211 boolean mFrozenWithFocus; 212 boolean mSelectionMoved; 213 boolean mTouchFocusSelected; 214 215 KeyListener mKeyListener; 216 int mInputType = EditorInfo.TYPE_NULL; 217 218 boolean mDiscardNextActionUp; 219 boolean mIgnoreActionUpEvent; 220 221 long mShowCursor; 222 private Blink mBlink; 223 224 boolean mCursorVisible = true; 225 boolean mSelectAllOnFocus; 226 boolean mTextIsSelectable; 227 228 CharSequence mError; 229 boolean mErrorWasChanged; 230 private ErrorPopup mErrorPopup; 231 232 /** 233 * This flag is set if the TextView tries to display an error before it 234 * is attached to the window (so its position is still unknown). 235 * It causes the error to be shown later, when onAttachedToWindow() 236 * is called. 237 */ 238 private boolean mShowErrorAfterAttach; 239 240 boolean mInBatchEditControllers; 241 boolean mShowSoftInputOnFocus = true; 242 private boolean mPreserveSelection; 243 private boolean mRestartActionModeOnNextRefresh; 244 245 private SelectionActionModeHelper mSelectionActionModeHelper; 246 247 boolean mIsBeingLongClicked; 248 249 private SuggestionsPopupWindow mSuggestionsPopupWindow; 250 SuggestionRangeSpan mSuggestionRangeSpan; 251 private Runnable mShowSuggestionRunnable; 252 253 Drawable mCursorDrawable = null; 254 255 private Drawable mSelectHandleLeft; 256 private Drawable mSelectHandleRight; 257 private Drawable mSelectHandleCenter; 258 259 // Global listener that detects changes in the global position of the TextView 260 private PositionListener mPositionListener; 261 262 private float mLastDownPositionX, mLastDownPositionY; 263 private float mContextMenuAnchorX, mContextMenuAnchorY; 264 Callback mCustomSelectionActionModeCallback; 265 Callback mCustomInsertionActionModeCallback; 266 267 // Set when this TextView gained focus with some text selected. Will start selection mode. 268 boolean mCreatedWithASelection; 269 270 // Indicates the current tap state (first tap, double tap, or triple click). 271 private int mTapState = TAP_STATE_INITIAL; 272 private long mLastTouchUpTime = 0; 273 private static final int TAP_STATE_INITIAL = 0; 274 private static final int TAP_STATE_FIRST_TAP = 1; 275 private static final int TAP_STATE_DOUBLE_TAP = 2; 276 // Only for mouse input. 277 private static final int TAP_STATE_TRIPLE_CLICK = 3; 278 279 // The button state as of the last time #onTouchEvent is called. 280 private int mLastButtonState; 281 282 private Runnable mInsertionActionModeRunnable; 283 284 // The span controller helps monitoring the changes to which the Editor needs to react: 285 // - EasyEditSpans, for which we have some UI to display on attach and on hide 286 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 287 private SpanController mSpanController; 288 289 private WordIterator mWordIterator; 290 SpellChecker mSpellChecker; 291 292 // This word iterator is set with text and used to determine word boundaries 293 // when a user is selecting text. 294 private WordIterator mWordIteratorWithText; 295 // Indicate that the text in the word iterator needs to be updated. 296 private boolean mUpdateWordIteratorText; 297 298 private Rect mTempRect; 299 300 private final TextView mTextView; 301 302 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 303 304 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 305 new CursorAnchorInfoNotifier(); 306 307 private final Runnable mShowFloatingToolbar = new Runnable() { 308 @Override 309 public void run() { 310 if (mTextActionMode != null) { 311 mTextActionMode.hide(0); // hide off. 312 } 313 } 314 }; 315 316 boolean mIsInsertionActionModeStartPending = false; 317 318 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 319 320 Editor(TextView textView) { 321 mTextView = textView; 322 // Synchronize the filter list, which places the undo input filter at the end. 323 mTextView.setFilters(mTextView.getFilters()); 324 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 325 mHapticTextHandleEnabled = mTextView.getContext().getResources().getBoolean( 326 com.android.internal.R.bool.config_enableHapticTextHandle); 327 } 328 329 ParcelableParcel saveInstanceState() { 330 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 331 Parcel parcel = state.getParcel(); 332 mUndoManager.saveInstanceState(parcel); 333 mUndoInputFilter.saveInstanceState(parcel); 334 return state; 335 } 336 337 void restoreInstanceState(ParcelableParcel state) { 338 Parcel parcel = state.getParcel(); 339 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 340 mUndoInputFilter.restoreInstanceState(parcel); 341 // Re-associate this object as the owner of undo state. 342 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 343 } 344 345 /** 346 * Forgets all undo and redo operations for this Editor. 347 */ 348 void forgetUndoRedo() { 349 UndoOwner[] owners = { mUndoOwner }; 350 mUndoManager.forgetUndos(owners, -1 /* all */); 351 mUndoManager.forgetRedos(owners, -1 /* all */); 352 } 353 354 boolean canUndo() { 355 UndoOwner[] owners = { mUndoOwner }; 356 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 357 } 358 359 boolean canRedo() { 360 UndoOwner[] owners = { mUndoOwner }; 361 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 362 } 363 364 void undo() { 365 if (!mAllowUndo) { 366 return; 367 } 368 UndoOwner[] owners = { mUndoOwner }; 369 mUndoManager.undo(owners, 1); // Undo 1 action. 370 } 371 372 void redo() { 373 if (!mAllowUndo) { 374 return; 375 } 376 UndoOwner[] owners = { mUndoOwner }; 377 mUndoManager.redo(owners, 1); // Redo 1 action. 378 } 379 380 void replace() { 381 if (mSuggestionsPopupWindow == null) { 382 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 383 } 384 hideCursorAndSpanControllers(); 385 mSuggestionsPopupWindow.show(); 386 387 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 388 Selection.setSelection((Spannable) mTextView.getText(), middle); 389 } 390 391 void onAttachedToWindow() { 392 if (mShowErrorAfterAttach) { 393 showError(); 394 mShowErrorAfterAttach = false; 395 } 396 397 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 398 // No need to create the controller. 399 // The get method will add the listener on controller creation. 400 if (mInsertionPointCursorController != null) { 401 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 402 } 403 if (mSelectionModifierCursorController != null) { 404 mSelectionModifierCursorController.resetTouchOffsets(); 405 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 406 } 407 updateSpellCheckSpans(0, mTextView.getText().length(), 408 true /* create the spell checker if needed */); 409 410 if (mTextView.hasSelection()) { 411 refreshTextActionMode(); 412 } 413 414 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 415 resumeBlink(); 416 } 417 418 void onDetachedFromWindow() { 419 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 420 421 if (mError != null) { 422 hideError(); 423 } 424 425 suspendBlink(); 426 427 if (mInsertionPointCursorController != null) { 428 mInsertionPointCursorController.onDetached(); 429 } 430 431 if (mSelectionModifierCursorController != null) { 432 mSelectionModifierCursorController.onDetached(); 433 } 434 435 if (mShowSuggestionRunnable != null) { 436 mTextView.removeCallbacks(mShowSuggestionRunnable); 437 } 438 439 // Cancel the single tap delayed runnable. 440 if (mInsertionActionModeRunnable != null) { 441 mTextView.removeCallbacks(mInsertionActionModeRunnable); 442 } 443 444 mTextView.removeCallbacks(mShowFloatingToolbar); 445 446 discardTextDisplayLists(); 447 448 if (mSpellChecker != null) { 449 mSpellChecker.closeSession(); 450 // Forces the creation of a new SpellChecker next time this window is created. 451 // Will handle the cases where the settings has been changed in the meantime. 452 mSpellChecker = null; 453 } 454 455 hideCursorAndSpanControllers(); 456 stopTextActionModeWithPreservingSelection(); 457 } 458 459 private void discardTextDisplayLists() { 460 if (mTextRenderNodes != null) { 461 for (int i = 0; i < mTextRenderNodes.length; i++) { 462 RenderNode displayList = mTextRenderNodes[i] != null 463 ? mTextRenderNodes[i].renderNode : null; 464 if (displayList != null && displayList.isValid()) { 465 displayList.discardDisplayList(); 466 } 467 } 468 } 469 } 470 471 private void showError() { 472 if (mTextView.getWindowToken() == null) { 473 mShowErrorAfterAttach = true; 474 return; 475 } 476 477 if (mErrorPopup == null) { 478 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 479 final TextView err = (TextView) inflater.inflate( 480 com.android.internal.R.layout.textview_hint, null); 481 482 final float scale = mTextView.getResources().getDisplayMetrics().density; 483 mErrorPopup = 484 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 485 mErrorPopup.setFocusable(false); 486 // The user is entering text, so the input method is needed. We 487 // don't want the popup to be displayed on top of it. 488 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 489 } 490 491 TextView tv = (TextView) mErrorPopup.getContentView(); 492 chooseSize(mErrorPopup, mError, tv); 493 tv.setText(mError); 494 495 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 496 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 497 } 498 499 public void setError(CharSequence error, Drawable icon) { 500 mError = TextUtils.stringOrSpannedString(error); 501 mErrorWasChanged = true; 502 503 if (mError == null) { 504 setErrorIcon(null); 505 if (mErrorPopup != null) { 506 if (mErrorPopup.isShowing()) { 507 mErrorPopup.dismiss(); 508 } 509 510 mErrorPopup = null; 511 } 512 mShowErrorAfterAttach = false; 513 } else { 514 setErrorIcon(icon); 515 if (mTextView.isFocused()) { 516 showError(); 517 } 518 } 519 } 520 521 private void setErrorIcon(Drawable icon) { 522 Drawables dr = mTextView.mDrawables; 523 if (dr == null) { 524 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 525 } 526 dr.setErrorDrawable(icon, mTextView); 527 528 mTextView.resetResolvedDrawables(); 529 mTextView.invalidate(); 530 mTextView.requestLayout(); 531 } 532 533 private void hideError() { 534 if (mErrorPopup != null) { 535 if (mErrorPopup.isShowing()) { 536 mErrorPopup.dismiss(); 537 } 538 } 539 540 mShowErrorAfterAttach = false; 541 } 542 543 /** 544 * Returns the X offset to make the pointy top of the error point 545 * at the middle of the error icon. 546 */ 547 private int getErrorX() { 548 /* 549 * The "25" is the distance between the point and the right edge 550 * of the background 551 */ 552 final float scale = mTextView.getResources().getDisplayMetrics().density; 553 554 final Drawables dr = mTextView.mDrawables; 555 556 final int layoutDirection = mTextView.getLayoutDirection(); 557 int errorX; 558 int offset; 559 switch (layoutDirection) { 560 default: 561 case View.LAYOUT_DIRECTION_LTR: 562 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 563 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 564 - mTextView.getPaddingRight() + offset; 565 break; 566 case View.LAYOUT_DIRECTION_RTL: 567 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 568 errorX = mTextView.getPaddingLeft() + offset; 569 break; 570 } 571 return errorX; 572 } 573 574 /** 575 * Returns the Y offset to make the pointy top of the error point 576 * at the bottom of the error icon. 577 */ 578 private int getErrorY() { 579 /* 580 * Compound, not extended, because the icon is not clipped 581 * if the text height is smaller. 582 */ 583 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 584 int vspace = mTextView.getBottom() - mTextView.getTop() 585 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 586 587 final Drawables dr = mTextView.mDrawables; 588 589 final int layoutDirection = mTextView.getLayoutDirection(); 590 int height; 591 switch (layoutDirection) { 592 default: 593 case View.LAYOUT_DIRECTION_LTR: 594 height = (dr != null ? dr.mDrawableHeightRight : 0); 595 break; 596 case View.LAYOUT_DIRECTION_RTL: 597 height = (dr != null ? dr.mDrawableHeightLeft : 0); 598 break; 599 } 600 601 int icontop = compoundPaddingTop + (vspace - height) / 2; 602 603 /* 604 * The "2" is the distance between the point and the top edge 605 * of the background. 606 */ 607 final float scale = mTextView.getResources().getDisplayMetrics().density; 608 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 609 } 610 611 void createInputContentTypeIfNeeded() { 612 if (mInputContentType == null) { 613 mInputContentType = new InputContentType(); 614 } 615 } 616 617 void createInputMethodStateIfNeeded() { 618 if (mInputMethodState == null) { 619 mInputMethodState = new InputMethodState(); 620 } 621 } 622 623 boolean isCursorVisible() { 624 // The default value is true, even when there is no associated Editor 625 return mCursorVisible && mTextView.isTextEditable(); 626 } 627 628 void prepareCursorControllers() { 629 boolean windowSupportsHandles = false; 630 631 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 632 if (params instanceof WindowManager.LayoutParams) { 633 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 634 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 635 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 636 } 637 638 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 639 mInsertionControllerEnabled = enabled && isCursorVisible(); 640 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 641 642 if (!mInsertionControllerEnabled) { 643 hideInsertionPointCursorController(); 644 if (mInsertionPointCursorController != null) { 645 mInsertionPointCursorController.onDetached(); 646 mInsertionPointCursorController = null; 647 } 648 } 649 650 if (!mSelectionControllerEnabled) { 651 stopTextActionMode(); 652 if (mSelectionModifierCursorController != null) { 653 mSelectionModifierCursorController.onDetached(); 654 mSelectionModifierCursorController = null; 655 } 656 } 657 } 658 659 void hideInsertionPointCursorController() { 660 if (mInsertionPointCursorController != null) { 661 mInsertionPointCursorController.hide(); 662 } 663 } 664 665 /** 666 * Hides the insertion and span controllers. 667 */ 668 void hideCursorAndSpanControllers() { 669 hideCursorControllers(); 670 hideSpanControllers(); 671 } 672 673 private void hideSpanControllers() { 674 if (mSpanController != null) { 675 mSpanController.hide(); 676 } 677 } 678 679 private void hideCursorControllers() { 680 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 681 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 682 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 683 // to distinguish one from the other. 684 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 685 || !mSuggestionsPopupWindow.isShowingUp())) { 686 // Should be done before hide insertion point controller since it triggers a show of it 687 mSuggestionsPopupWindow.hide(); 688 } 689 hideInsertionPointCursorController(); 690 } 691 692 /** 693 * Create new SpellCheckSpans on the modified region. 694 */ 695 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 696 // Remove spans whose adjacent characters are text not punctuation 697 mTextView.removeAdjacentSuggestionSpans(start); 698 mTextView.removeAdjacentSuggestionSpans(end); 699 700 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 701 && !(mTextView.isInExtractedMode())) { 702 if (mSpellChecker == null && createSpellChecker) { 703 mSpellChecker = new SpellChecker(mTextView); 704 } 705 if (mSpellChecker != null) { 706 mSpellChecker.spellCheck(start, end); 707 } 708 } 709 } 710 711 void onScreenStateChanged(int screenState) { 712 switch (screenState) { 713 case View.SCREEN_STATE_ON: 714 resumeBlink(); 715 break; 716 case View.SCREEN_STATE_OFF: 717 suspendBlink(); 718 break; 719 } 720 } 721 722 private void suspendBlink() { 723 if (mBlink != null) { 724 mBlink.cancel(); 725 } 726 } 727 728 private void resumeBlink() { 729 if (mBlink != null) { 730 mBlink.uncancel(); 731 makeBlink(); 732 } 733 } 734 735 void adjustInputType(boolean password, boolean passwordInputType, 736 boolean webPasswordInputType, boolean numberPasswordInputType) { 737 // mInputType has been set from inputType, possibly modified by mInputMethod. 738 // Specialize mInputType to [web]password if we have a text class and the original input 739 // type was a password. 740 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 741 if (password || passwordInputType) { 742 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 743 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 744 } 745 if (webPasswordInputType) { 746 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 747 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 748 } 749 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 750 if (numberPasswordInputType) { 751 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 752 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 753 } 754 } 755 } 756 757 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 758 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 759 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 760 761 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 762 com.android.internal.R.dimen.textview_error_popup_default_width); 763 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 764 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 765 float max = 0; 766 for (int i = 0; i < l.getLineCount(); i++) { 767 max = Math.max(max, l.getLineWidth(i)); 768 } 769 770 /* 771 * Now set the popup size to be big enough for the text plus the border capped 772 * to DEFAULT_MAX_POPUP_WIDTH 773 */ 774 pop.setWidth(wid + (int) Math.ceil(max)); 775 pop.setHeight(ht + l.getHeight()); 776 } 777 778 void setFrame() { 779 if (mErrorPopup != null) { 780 TextView tv = (TextView) mErrorPopup.getContentView(); 781 chooseSize(mErrorPopup, mError, tv); 782 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 783 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 784 } 785 } 786 787 private int getWordStart(int offset) { 788 // FIXME - For this and similar methods we're not doing anything to check if there's 789 // a LocaleSpan in the text, this may be something we should try handling or checking for. 790 int retOffset = getWordIteratorWithText().prevBoundary(offset); 791 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 792 // On punctuation boundary or within group of punctuation, find punctuation start. 793 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 794 } else { 795 // Not on a punctuation boundary, find the word start. 796 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 797 } 798 if (retOffset == BreakIterator.DONE) { 799 return offset; 800 } 801 return retOffset; 802 } 803 804 private int getWordEnd(int offset) { 805 int retOffset = getWordIteratorWithText().nextBoundary(offset); 806 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 807 // On punctuation boundary or within group of punctuation, find punctuation end. 808 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 809 } else { 810 // Not on a punctuation boundary, find the word end. 811 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 812 } 813 if (retOffset == BreakIterator.DONE) { 814 return offset; 815 } 816 return retOffset; 817 } 818 819 private boolean needsToSelectAllToSelectWordOrParagraph() { 820 if (mTextView.hasPasswordTransformationMethod()) { 821 // Always select all on a password field. 822 // Cut/copy menu entries are not available for passwords, but being able to select all 823 // is however useful to delete or paste to replace the entire content. 824 return true; 825 } 826 827 int inputType = mTextView.getInputType(); 828 int klass = inputType & InputType.TYPE_MASK_CLASS; 829 int variation = inputType & InputType.TYPE_MASK_VARIATION; 830 831 // Specific text field types: select the entire text for these 832 if (klass == InputType.TYPE_CLASS_NUMBER 833 || klass == InputType.TYPE_CLASS_PHONE 834 || klass == InputType.TYPE_CLASS_DATETIME 835 || variation == InputType.TYPE_TEXT_VARIATION_URI 836 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 837 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 838 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 839 return true; 840 } 841 return false; 842 } 843 844 /** 845 * Adjusts selection to the word under last touch offset. Return true if the operation was 846 * successfully performed. 847 */ 848 boolean selectCurrentWord() { 849 if (!mTextView.canSelectText()) { 850 return false; 851 } 852 853 if (needsToSelectAllToSelectWordOrParagraph()) { 854 return mTextView.selectAllText(); 855 } 856 857 long lastTouchOffsets = getLastTouchOffsets(); 858 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 859 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 860 861 // Safety check in case standard touch event handling has been bypassed 862 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 863 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 864 865 int selectionStart, selectionEnd; 866 867 // If a URLSpan (web address, email, phone...) is found at that position, select it. 868 URLSpan[] urlSpans = 869 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 870 if (urlSpans.length >= 1) { 871 URLSpan urlSpan = urlSpans[0]; 872 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 873 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 874 } else { 875 // FIXME - We should check if there's a LocaleSpan in the text, this may be 876 // something we should try handling or checking for. 877 final WordIterator wordIterator = getWordIterator(); 878 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 879 880 selectionStart = wordIterator.getBeginning(minOffset); 881 selectionEnd = wordIterator.getEnd(maxOffset); 882 883 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 884 || selectionStart == selectionEnd) { 885 // Possible when the word iterator does not properly handle the text's language 886 long range = getCharClusterRange(minOffset); 887 selectionStart = TextUtils.unpackRangeStartFromLong(range); 888 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 889 } 890 } 891 892 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 893 return selectionEnd > selectionStart; 894 } 895 896 /** 897 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 898 * successfully performed. 899 */ 900 private boolean selectCurrentParagraph() { 901 if (!mTextView.canSelectText()) { 902 return false; 903 } 904 905 if (needsToSelectAllToSelectWordOrParagraph()) { 906 return mTextView.selectAllText(); 907 } 908 909 long lastTouchOffsets = getLastTouchOffsets(); 910 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 911 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 912 913 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 914 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 915 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 916 if (start < end) { 917 Selection.setSelection((Spannable) mTextView.getText(), start, end); 918 return true; 919 } 920 return false; 921 } 922 923 /** 924 * Get the minimum range of paragraphs that contains startOffset and endOffset. 925 */ 926 private long getParagraphsRange(int startOffset, int endOffset) { 927 final Layout layout = mTextView.getLayout(); 928 if (layout == null) { 929 return TextUtils.packRangeInLong(-1, -1); 930 } 931 final CharSequence text = mTextView.getText(); 932 int minLine = layout.getLineForOffset(startOffset); 933 // Search paragraph start. 934 while (minLine > 0) { 935 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 936 if (text.charAt(prevLineEndOffset - 1) == '\n') { 937 break; 938 } 939 minLine--; 940 } 941 int maxLine = layout.getLineForOffset(endOffset); 942 // Search paragraph end. 943 while (maxLine < layout.getLineCount() - 1) { 944 final int lineEndOffset = layout.getLineEnd(maxLine); 945 if (text.charAt(lineEndOffset - 1) == '\n') { 946 break; 947 } 948 maxLine++; 949 } 950 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 951 } 952 953 void onLocaleChanged() { 954 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 955 // proper new locale 956 mWordIterator = null; 957 mWordIteratorWithText = null; 958 } 959 960 public WordIterator getWordIterator() { 961 if (mWordIterator == null) { 962 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 963 } 964 return mWordIterator; 965 } 966 967 private WordIterator getWordIteratorWithText() { 968 if (mWordIteratorWithText == null) { 969 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 970 mUpdateWordIteratorText = true; 971 } 972 if (mUpdateWordIteratorText) { 973 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 974 // to the user's selection is needed. A possible solution would be to 975 // copy some number N of characters near the selection and then when the 976 // user approaches N then we'd do another copy of the next N characters. 977 CharSequence text = mTextView.getText(); 978 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 979 mUpdateWordIteratorText = false; 980 } 981 return mWordIteratorWithText; 982 } 983 984 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 985 final Layout layout = mTextView.getLayout(); 986 if (layout == null) return offset; 987 return findAfterGivenOffset == layout.isRtlCharAt(offset) 988 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 989 } 990 991 private long getCharClusterRange(int offset) { 992 final int textLength = mTextView.getText().length(); 993 if (offset < textLength) { 994 final int clusterEndOffset = getNextCursorOffset(offset, true); 995 return TextUtils.packRangeInLong( 996 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 997 } 998 if (offset - 1 >= 0) { 999 final int clusterStartOffset = getNextCursorOffset(offset, false); 1000 return TextUtils.packRangeInLong(clusterStartOffset, 1001 getNextCursorOffset(clusterStartOffset, true)); 1002 } 1003 return TextUtils.packRangeInLong(offset, offset); 1004 } 1005 1006 private boolean touchPositionIsInSelection() { 1007 int selectionStart = mTextView.getSelectionStart(); 1008 int selectionEnd = mTextView.getSelectionEnd(); 1009 1010 if (selectionStart == selectionEnd) { 1011 return false; 1012 } 1013 1014 if (selectionStart > selectionEnd) { 1015 int tmp = selectionStart; 1016 selectionStart = selectionEnd; 1017 selectionEnd = tmp; 1018 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1019 } 1020 1021 SelectionModifierCursorController selectionController = getSelectionController(); 1022 int minOffset = selectionController.getMinTouchOffset(); 1023 int maxOffset = selectionController.getMaxTouchOffset(); 1024 1025 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1026 } 1027 1028 private PositionListener getPositionListener() { 1029 if (mPositionListener == null) { 1030 mPositionListener = new PositionListener(); 1031 } 1032 return mPositionListener; 1033 } 1034 1035 private interface TextViewPositionListener { 1036 public void updatePosition(int parentPositionX, int parentPositionY, 1037 boolean parentPositionChanged, boolean parentScrolled); 1038 } 1039 1040 private boolean isOffsetVisible(int offset) { 1041 Layout layout = mTextView.getLayout(); 1042 if (layout == null) return false; 1043 1044 final int line = layout.getLineForOffset(offset); 1045 final int lineBottom = layout.getLineBottom(line); 1046 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1047 return mTextView.isPositionVisible( 1048 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1049 lineBottom + mTextView.viewportToContentVerticalOffset()); 1050 } 1051 1052 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1053 * in the view. Returns false when the position is in the empty space of left/right of text. 1054 */ 1055 private boolean isPositionOnText(float x, float y) { 1056 Layout layout = mTextView.getLayout(); 1057 if (layout == null) return false; 1058 1059 final int line = mTextView.getLineAtCoordinate(y); 1060 x = mTextView.convertToLocalHorizontalCoordinate(x); 1061 1062 if (x < layout.getLineLeft(line)) return false; 1063 if (x > layout.getLineRight(line)) return false; 1064 return true; 1065 } 1066 1067 private void startDragAndDrop() { 1068 // TODO: Fix drag and drop in full screen extracted mode. 1069 if (mTextView.isInExtractedMode()) { 1070 return; 1071 } 1072 final int start = mTextView.getSelectionStart(); 1073 final int end = mTextView.getSelectionEnd(); 1074 CharSequence selectedText = mTextView.getTransformedText(start, end); 1075 ClipData data = ClipData.newPlainText(null, selectedText); 1076 DragLocalState localState = new DragLocalState(mTextView, start, end); 1077 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1078 View.DRAG_FLAG_GLOBAL); 1079 stopTextActionMode(); 1080 if (hasSelectionController()) { 1081 getSelectionController().resetTouchOffsets(); 1082 } 1083 } 1084 1085 public boolean performLongClick(boolean handled) { 1086 // Long press in empty space moves cursor and starts the insertion action mode. 1087 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1088 && mInsertionControllerEnabled) { 1089 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1090 mLastDownPositionY); 1091 Selection.setSelection((Spannable) mTextView.getText(), offset); 1092 getInsertionController().show(); 1093 mIsInsertionActionModeStartPending = true; 1094 handled = true; 1095 MetricsLogger.action( 1096 mTextView.getContext(), 1097 MetricsEvent.TEXT_LONGPRESS, 1098 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1099 } 1100 1101 if (!handled && mTextActionMode != null) { 1102 if (touchPositionIsInSelection()) { 1103 startDragAndDrop(); 1104 MetricsLogger.action( 1105 mTextView.getContext(), 1106 MetricsEvent.TEXT_LONGPRESS, 1107 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1108 } else { 1109 stopTextActionMode(); 1110 selectCurrentWordAndStartDrag(); 1111 MetricsLogger.action( 1112 mTextView.getContext(), 1113 MetricsEvent.TEXT_LONGPRESS, 1114 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1115 } 1116 handled = true; 1117 } 1118 1119 // Start a new selection 1120 if (!handled) { 1121 handled = selectCurrentWordAndStartDrag(); 1122 if (handled) { 1123 MetricsLogger.action( 1124 mTextView.getContext(), 1125 MetricsEvent.TEXT_LONGPRESS, 1126 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1127 } 1128 } 1129 1130 return handled; 1131 } 1132 1133 private long getLastTouchOffsets() { 1134 SelectionModifierCursorController selectionController = getSelectionController(); 1135 final int minOffset = selectionController.getMinTouchOffset(); 1136 final int maxOffset = selectionController.getMaxTouchOffset(); 1137 return TextUtils.packRangeInLong(minOffset, maxOffset); 1138 } 1139 1140 void onFocusChanged(boolean focused, int direction) { 1141 mShowCursor = SystemClock.uptimeMillis(); 1142 ensureEndedBatchEdit(); 1143 1144 if (focused) { 1145 int selStart = mTextView.getSelectionStart(); 1146 int selEnd = mTextView.getSelectionEnd(); 1147 1148 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1149 // mode for these, unless there was a specific selection already started. 1150 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1151 && selEnd == mTextView.getText().length(); 1152 1153 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1154 && !isFocusHighlighted; 1155 1156 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1157 // If a tap was used to give focus to that view, move cursor at tap position. 1158 // Has to be done before onTakeFocus, which can be overloaded. 1159 final int lastTapPosition = getLastTapPosition(); 1160 if (lastTapPosition >= 0) { 1161 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1162 } 1163 1164 // Note this may have to be moved out of the Editor class 1165 MovementMethod mMovement = mTextView.getMovementMethod(); 1166 if (mMovement != null) { 1167 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1168 } 1169 1170 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1171 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1172 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1173 // This special case ensure that we keep current selection in that case. 1174 // It would be better to know why the DecorView does not have focus at that time. 1175 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1176 && selStart >= 0 && selEnd >= 0) { 1177 /* 1178 * Someone intentionally set the selection, so let them 1179 * do whatever it is that they wanted to do instead of 1180 * the default on-focus behavior. We reset the selection 1181 * here instead of just skipping the onTakeFocus() call 1182 * because some movement methods do something other than 1183 * just setting the selection in theirs and we still 1184 * need to go through that path. 1185 */ 1186 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1187 } 1188 1189 if (mSelectAllOnFocus) { 1190 mTextView.selectAllText(); 1191 } 1192 1193 mTouchFocusSelected = true; 1194 } 1195 1196 mFrozenWithFocus = false; 1197 mSelectionMoved = false; 1198 1199 if (mError != null) { 1200 showError(); 1201 } 1202 1203 makeBlink(); 1204 } else { 1205 if (mError != null) { 1206 hideError(); 1207 } 1208 // Don't leave us in the middle of a batch edit. 1209 mTextView.onEndBatchEdit(); 1210 1211 if (mTextView.isInExtractedMode()) { 1212 hideCursorAndSpanControllers(); 1213 stopTextActionModeWithPreservingSelection(); 1214 } else { 1215 hideCursorAndSpanControllers(); 1216 if (mTextView.isTemporarilyDetached()) { 1217 stopTextActionModeWithPreservingSelection(); 1218 } else { 1219 stopTextActionMode(); 1220 } 1221 downgradeEasyCorrectionSpans(); 1222 } 1223 // No need to create the controller 1224 if (mSelectionModifierCursorController != null) { 1225 mSelectionModifierCursorController.resetTouchOffsets(); 1226 } 1227 } 1228 } 1229 1230 /** 1231 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1232 * span. 1233 */ 1234 private void downgradeEasyCorrectionSpans() { 1235 CharSequence text = mTextView.getText(); 1236 if (text instanceof Spannable) { 1237 Spannable spannable = (Spannable) text; 1238 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1239 spannable.length(), SuggestionSpan.class); 1240 for (int i = 0; i < suggestionSpans.length; i++) { 1241 int flags = suggestionSpans[i].getFlags(); 1242 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1243 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1244 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1245 suggestionSpans[i].setFlags(flags); 1246 } 1247 } 1248 } 1249 } 1250 1251 void sendOnTextChanged(int start, int after) { 1252 updateSpellCheckSpans(start, start + after, false); 1253 1254 // Flip flag to indicate the word iterator needs to have the text reset. 1255 mUpdateWordIteratorText = true; 1256 1257 // Hide the controllers as soon as text is modified (typing, procedural...) 1258 // We do not hide the span controllers, since they can be added when a new text is 1259 // inserted into the text view (voice IME). 1260 hideCursorControllers(); 1261 // Reset drag accelerator. 1262 if (mSelectionModifierCursorController != null) { 1263 mSelectionModifierCursorController.resetTouchOffsets(); 1264 } 1265 stopTextActionMode(); 1266 } 1267 1268 private int getLastTapPosition() { 1269 // No need to create the controller at that point, no last tap position saved 1270 if (mSelectionModifierCursorController != null) { 1271 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1272 if (lastTapPosition >= 0) { 1273 // Safety check, should not be possible. 1274 if (lastTapPosition > mTextView.getText().length()) { 1275 lastTapPosition = mTextView.getText().length(); 1276 } 1277 return lastTapPosition; 1278 } 1279 } 1280 1281 return -1; 1282 } 1283 1284 void onWindowFocusChanged(boolean hasWindowFocus) { 1285 if (hasWindowFocus) { 1286 if (mBlink != null) { 1287 mBlink.uncancel(); 1288 makeBlink(); 1289 } 1290 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1291 refreshTextActionMode(); 1292 } 1293 } else { 1294 if (mBlink != null) { 1295 mBlink.cancel(); 1296 } 1297 if (mInputContentType != null) { 1298 mInputContentType.enterDown = false; 1299 } 1300 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1301 hideCursorAndSpanControllers(); 1302 stopTextActionModeWithPreservingSelection(); 1303 if (mSuggestionsPopupWindow != null) { 1304 mSuggestionsPopupWindow.onParentLostFocus(); 1305 } 1306 1307 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1308 ensureEndedBatchEdit(); 1309 } 1310 } 1311 1312 private void updateTapState(MotionEvent event) { 1313 final int action = event.getActionMasked(); 1314 if (action == MotionEvent.ACTION_DOWN) { 1315 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1316 // Detect double tap and triple click. 1317 if (((mTapState == TAP_STATE_FIRST_TAP) 1318 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1319 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1320 <= ViewConfiguration.getDoubleTapTimeout()) { 1321 if (mTapState == TAP_STATE_FIRST_TAP) { 1322 mTapState = TAP_STATE_DOUBLE_TAP; 1323 } else { 1324 mTapState = TAP_STATE_TRIPLE_CLICK; 1325 } 1326 } else { 1327 mTapState = TAP_STATE_FIRST_TAP; 1328 } 1329 } 1330 if (action == MotionEvent.ACTION_UP) { 1331 mLastTouchUpTime = SystemClock.uptimeMillis(); 1332 } 1333 } 1334 1335 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1336 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1337 return false; 1338 } 1339 final boolean primaryButtonStateChanged = 1340 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1341 final int action = event.getActionMasked(); 1342 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1343 && !primaryButtonStateChanged) { 1344 return true; 1345 } 1346 if (action == MotionEvent.ACTION_MOVE 1347 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1348 return true; 1349 } 1350 return false; 1351 } 1352 1353 void onTouchEvent(MotionEvent event) { 1354 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1355 mLastButtonState = event.getButtonState(); 1356 if (filterOutEvent) { 1357 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1358 mDiscardNextActionUp = true; 1359 } 1360 return; 1361 } 1362 updateTapState(event); 1363 updateFloatingToolbarVisibility(event); 1364 1365 if (hasSelectionController()) { 1366 getSelectionController().onTouchEvent(event); 1367 } 1368 1369 if (mShowSuggestionRunnable != null) { 1370 mTextView.removeCallbacks(mShowSuggestionRunnable); 1371 mShowSuggestionRunnable = null; 1372 } 1373 1374 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1375 mLastDownPositionX = event.getX(); 1376 mLastDownPositionY = event.getY(); 1377 1378 // Reset this state; it will be re-set if super.onTouchEvent 1379 // causes focus to move to the view. 1380 mTouchFocusSelected = false; 1381 mIgnoreActionUpEvent = false; 1382 } 1383 } 1384 1385 private void updateFloatingToolbarVisibility(MotionEvent event) { 1386 if (mTextActionMode != null) { 1387 switch (event.getActionMasked()) { 1388 case MotionEvent.ACTION_MOVE: 1389 hideFloatingToolbar(ActionMode.DEFAULT_HIDE_DURATION); 1390 break; 1391 case MotionEvent.ACTION_UP: // fall through 1392 case MotionEvent.ACTION_CANCEL: 1393 showFloatingToolbar(); 1394 } 1395 } 1396 } 1397 1398 void hideFloatingToolbar(int duration) { 1399 if (mTextActionMode != null) { 1400 mTextView.removeCallbacks(mShowFloatingToolbar); 1401 mTextActionMode.hide(duration); 1402 } 1403 } 1404 1405 private void showFloatingToolbar() { 1406 if (mTextActionMode != null) { 1407 // Delay "show" so it doesn't interfere with click confirmations 1408 // or double-clicks that could "dismiss" the floating toolbar. 1409 int delay = ViewConfiguration.getDoubleTapTimeout(); 1410 mTextView.postDelayed(mShowFloatingToolbar, delay); 1411 1412 // This classifies the text and most likely returns before the toolbar is actually 1413 // shown. If not, it will update the toolbar with the result when classification 1414 // returns. We would rather not wait for a long running classification process. 1415 invalidateActionModeAsync(); 1416 } 1417 } 1418 1419 public void beginBatchEdit() { 1420 mInBatchEditControllers = true; 1421 final InputMethodState ims = mInputMethodState; 1422 if (ims != null) { 1423 int nesting = ++ims.mBatchEditNesting; 1424 if (nesting == 1) { 1425 ims.mCursorChanged = false; 1426 ims.mChangedDelta = 0; 1427 if (ims.mContentChanged) { 1428 // We already have a pending change from somewhere else, 1429 // so turn this into a full update. 1430 ims.mChangedStart = 0; 1431 ims.mChangedEnd = mTextView.getText().length(); 1432 } else { 1433 ims.mChangedStart = EXTRACT_UNKNOWN; 1434 ims.mChangedEnd = EXTRACT_UNKNOWN; 1435 ims.mContentChanged = false; 1436 } 1437 mUndoInputFilter.beginBatchEdit(); 1438 mTextView.onBeginBatchEdit(); 1439 } 1440 } 1441 } 1442 1443 public void endBatchEdit() { 1444 mInBatchEditControllers = false; 1445 final InputMethodState ims = mInputMethodState; 1446 if (ims != null) { 1447 int nesting = --ims.mBatchEditNesting; 1448 if (nesting == 0) { 1449 finishBatchEdit(ims); 1450 } 1451 } 1452 } 1453 1454 void ensureEndedBatchEdit() { 1455 final InputMethodState ims = mInputMethodState; 1456 if (ims != null && ims.mBatchEditNesting != 0) { 1457 ims.mBatchEditNesting = 0; 1458 finishBatchEdit(ims); 1459 } 1460 } 1461 1462 void finishBatchEdit(final InputMethodState ims) { 1463 mTextView.onEndBatchEdit(); 1464 mUndoInputFilter.endBatchEdit(); 1465 1466 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1467 mTextView.updateAfterEdit(); 1468 reportExtractedText(); 1469 } else if (ims.mCursorChanged) { 1470 // Cheesy way to get us to report the current cursor location. 1471 mTextView.invalidateCursor(); 1472 } 1473 // sendUpdateSelection knows to avoid sending if the selection did 1474 // not actually change. 1475 sendUpdateSelection(); 1476 1477 // Show drag handles if they were blocked by batch edit mode. 1478 if (mTextActionMode != null) { 1479 final CursorController cursorController = mTextView.hasSelection() 1480 ? getSelectionController() : getInsertionController(); 1481 if (cursorController != null && !cursorController.isActive() 1482 && !cursorController.isCursorBeingModified()) { 1483 cursorController.show(); 1484 } 1485 } 1486 } 1487 1488 static final int EXTRACT_NOTHING = -2; 1489 static final int EXTRACT_UNKNOWN = -1; 1490 1491 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1492 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1493 EXTRACT_UNKNOWN, outText); 1494 } 1495 1496 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1497 int partialStartOffset, int partialEndOffset, int delta, 1498 @Nullable ExtractedText outText) { 1499 if (request == null || outText == null) { 1500 return false; 1501 } 1502 1503 final CharSequence content = mTextView.getText(); 1504 if (content == null) { 1505 return false; 1506 } 1507 1508 if (partialStartOffset != EXTRACT_NOTHING) { 1509 final int N = content.length(); 1510 if (partialStartOffset < 0) { 1511 outText.partialStartOffset = outText.partialEndOffset = -1; 1512 partialStartOffset = 0; 1513 partialEndOffset = N; 1514 } else { 1515 // Now use the delta to determine the actual amount of text 1516 // we need. 1517 partialEndOffset += delta; 1518 // Adjust offsets to ensure we contain full spans. 1519 if (content instanceof Spanned) { 1520 Spanned spanned = (Spanned) content; 1521 Object[] spans = spanned.getSpans(partialStartOffset, 1522 partialEndOffset, ParcelableSpan.class); 1523 int i = spans.length; 1524 while (i > 0) { 1525 i--; 1526 int j = spanned.getSpanStart(spans[i]); 1527 if (j < partialStartOffset) partialStartOffset = j; 1528 j = spanned.getSpanEnd(spans[i]); 1529 if (j > partialEndOffset) partialEndOffset = j; 1530 } 1531 } 1532 outText.partialStartOffset = partialStartOffset; 1533 outText.partialEndOffset = partialEndOffset - delta; 1534 1535 if (partialStartOffset > N) { 1536 partialStartOffset = N; 1537 } else if (partialStartOffset < 0) { 1538 partialStartOffset = 0; 1539 } 1540 if (partialEndOffset > N) { 1541 partialEndOffset = N; 1542 } else if (partialEndOffset < 0) { 1543 partialEndOffset = 0; 1544 } 1545 } 1546 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1547 outText.text = content.subSequence(partialStartOffset, 1548 partialEndOffset); 1549 } else { 1550 outText.text = TextUtils.substring(content, partialStartOffset, 1551 partialEndOffset); 1552 } 1553 } else { 1554 outText.partialStartOffset = 0; 1555 outText.partialEndOffset = 0; 1556 outText.text = ""; 1557 } 1558 outText.flags = 0; 1559 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1560 outText.flags |= ExtractedText.FLAG_SELECTING; 1561 } 1562 if (mTextView.isSingleLine()) { 1563 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1564 } 1565 outText.startOffset = 0; 1566 outText.selectionStart = mTextView.getSelectionStart(); 1567 outText.selectionEnd = mTextView.getSelectionEnd(); 1568 return true; 1569 } 1570 1571 boolean reportExtractedText() { 1572 final Editor.InputMethodState ims = mInputMethodState; 1573 if (ims != null) { 1574 final boolean contentChanged = ims.mContentChanged; 1575 if (contentChanged || ims.mSelectionModeChanged) { 1576 ims.mContentChanged = false; 1577 ims.mSelectionModeChanged = false; 1578 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1579 if (req != null) { 1580 InputMethodManager imm = InputMethodManager.peekInstance(); 1581 if (imm != null) { 1582 if (TextView.DEBUG_EXTRACT) { 1583 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1584 + ims.mChangedStart 1585 + " end=" + ims.mChangedEnd 1586 + " delta=" + ims.mChangedDelta); 1587 } 1588 if (ims.mChangedStart < 0 && !contentChanged) { 1589 ims.mChangedStart = EXTRACT_NOTHING; 1590 } 1591 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1592 ims.mChangedDelta, ims.mExtractedText)) { 1593 if (TextView.DEBUG_EXTRACT) { 1594 Log.v(TextView.LOG_TAG, 1595 "Reporting extracted start=" 1596 + ims.mExtractedText.partialStartOffset 1597 + " end=" + ims.mExtractedText.partialEndOffset 1598 + ": " + ims.mExtractedText.text); 1599 } 1600 1601 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1602 ims.mChangedStart = EXTRACT_UNKNOWN; 1603 ims.mChangedEnd = EXTRACT_UNKNOWN; 1604 ims.mChangedDelta = 0; 1605 ims.mContentChanged = false; 1606 return true; 1607 } 1608 } 1609 } 1610 } 1611 } 1612 return false; 1613 } 1614 1615 private void sendUpdateSelection() { 1616 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1617 final InputMethodManager imm = InputMethodManager.peekInstance(); 1618 if (null != imm) { 1619 final int selectionStart = mTextView.getSelectionStart(); 1620 final int selectionEnd = mTextView.getSelectionEnd(); 1621 int candStart = -1; 1622 int candEnd = -1; 1623 if (mTextView.getText() instanceof Spannable) { 1624 final Spannable sp = (Spannable) mTextView.getText(); 1625 candStart = EditableInputConnection.getComposingSpanStart(sp); 1626 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1627 } 1628 // InputMethodManager#updateSelection skips sending the message if 1629 // none of the parameters have changed since the last time we called it. 1630 imm.updateSelection(mTextView, 1631 selectionStart, selectionEnd, candStart, candEnd); 1632 } 1633 } 1634 } 1635 1636 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1637 int cursorOffsetVertical) { 1638 final int selectionStart = mTextView.getSelectionStart(); 1639 final int selectionEnd = mTextView.getSelectionEnd(); 1640 1641 final InputMethodState ims = mInputMethodState; 1642 if (ims != null && ims.mBatchEditNesting == 0) { 1643 InputMethodManager imm = InputMethodManager.peekInstance(); 1644 if (imm != null) { 1645 if (imm.isActive(mTextView)) { 1646 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1647 // We are in extract mode and the content has changed 1648 // in some way... just report complete new text to the 1649 // input method. 1650 reportExtractedText(); 1651 } 1652 } 1653 } 1654 } 1655 1656 if (mCorrectionHighlighter != null) { 1657 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1658 } 1659 1660 if (highlight != null && selectionStart == selectionEnd && mCursorDrawable != null) { 1661 drawCursor(canvas, cursorOffsetVertical); 1662 // Rely on the drawable entirely, do not draw the cursor line. 1663 // Has to be done after the IMM related code above which relies on the highlight. 1664 highlight = null; 1665 } 1666 1667 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1668 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1669 cursorOffsetVertical); 1670 } else { 1671 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1672 } 1673 } 1674 1675 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1676 Paint highlightPaint, int cursorOffsetVertical) { 1677 final long lineRange = layout.getLineRangeForDraw(canvas); 1678 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1679 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1680 if (lastLine < 0) return; 1681 1682 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1683 firstLine, lastLine); 1684 1685 if (layout instanceof DynamicLayout) { 1686 if (mTextRenderNodes == null) { 1687 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1688 } 1689 1690 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1691 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1692 int[] blockIndices = dynamicLayout.getBlockIndices(); 1693 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1694 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1695 1696 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1697 if (blockSet != null) { 1698 for (int i = 0; i < blockSet.size(); i++) { 1699 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1700 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1701 && mTextRenderNodes[blockIndex] != null) { 1702 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1703 } 1704 } 1705 } 1706 1707 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1708 if (startBlock < 0) { 1709 startBlock = -(startBlock + 1); 1710 } 1711 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1712 1713 int startIndexToFindAvailableRenderNode = 0; 1714 int lastIndex = numberOfBlocks; 1715 1716 for (int i = startBlock; i < numberOfBlocks; i++) { 1717 final int blockIndex = blockIndices[i]; 1718 if (i >= indexFirstChangedBlock 1719 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1720 && mTextRenderNodes[blockIndex] != null) { 1721 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1722 } 1723 if (blockEndLines[i] < firstLine) { 1724 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1725 // be redrawn after they get scrolled into drawing range. 1726 continue; 1727 } 1728 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1729 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1730 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1731 if (blockEndLines[i] >= lastLine) { 1732 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1733 break; 1734 } 1735 } 1736 if (blockSet != null) { 1737 for (int i = 0; i < blockSet.size(); i++) { 1738 final int block = blockSet.valueAt(i); 1739 final int blockIndex = dynamicLayout.getBlockIndex(block); 1740 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1741 || mTextRenderNodes[blockIndex] == null 1742 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1743 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1744 layout, highlight, highlightPaint, cursorOffsetVertical, 1745 blockEndLines, blockIndices, block, numberOfBlocks, 1746 startIndexToFindAvailableRenderNode); 1747 } 1748 } 1749 } 1750 1751 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1752 } else { 1753 // Boring layout is used for empty and hint text 1754 layout.drawText(canvas, firstLine, lastLine); 1755 } 1756 } 1757 1758 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1759 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1760 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1761 int startIndexToFindAvailableRenderNode) { 1762 final int blockEndLine = blockEndLines[blockInfoIndex]; 1763 int blockIndex = blockIndices[blockInfoIndex]; 1764 1765 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1766 if (blockIsInvalid) { 1767 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1768 startIndexToFindAvailableRenderNode); 1769 // Note how dynamic layout's internal block indices get updated from Editor 1770 blockIndices[blockInfoIndex] = blockIndex; 1771 if (mTextRenderNodes[blockIndex] != null) { 1772 mTextRenderNodes[blockIndex].isDirty = true; 1773 } 1774 startIndexToFindAvailableRenderNode = blockIndex + 1; 1775 } 1776 1777 if (mTextRenderNodes[blockIndex] == null) { 1778 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1779 } 1780 1781 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1782 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1783 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1784 final int blockBeginLine = blockInfoIndex == 0 ? 1785 0 : blockEndLines[blockInfoIndex - 1] + 1; 1786 final int top = layout.getLineTop(blockBeginLine); 1787 final int bottom = layout.getLineBottom(blockEndLine); 1788 int left = 0; 1789 int right = mTextView.getWidth(); 1790 if (mTextView.getHorizontallyScrolling()) { 1791 float min = Float.MAX_VALUE; 1792 float max = Float.MIN_VALUE; 1793 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1794 min = Math.min(min, layout.getLineLeft(line)); 1795 max = Math.max(max, layout.getLineRight(line)); 1796 } 1797 left = (int) min; 1798 right = (int) (max + 0.5f); 1799 } 1800 1801 // Rebuild display list if it is invalid 1802 if (blockDisplayListIsInvalid) { 1803 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1804 right - left, bottom - top); 1805 try { 1806 // drawText is always relative to TextView's origin, this translation 1807 // brings this range of text back to the top left corner of the viewport 1808 displayListCanvas.translate(-left, -top); 1809 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1810 mTextRenderNodes[blockIndex].isDirty = false; 1811 // No need to untranslate, previous context is popped after 1812 // drawDisplayList 1813 } finally { 1814 blockDisplayList.end(displayListCanvas); 1815 // Same as drawDisplayList below, handled by our TextView's parent 1816 blockDisplayList.setClipToBounds(false); 1817 } 1818 } 1819 1820 // Valid display list only needs to update its drawing location. 1821 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1822 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1823 } 1824 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1825 return startIndexToFindAvailableRenderNode; 1826 } 1827 1828 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1829 int searchStartIndex) { 1830 int length = mTextRenderNodes.length; 1831 for (int i = searchStartIndex; i < length; i++) { 1832 boolean blockIndexFound = false; 1833 for (int j = 0; j < numberOfBlocks; j++) { 1834 if (blockIndices[j] == i) { 1835 blockIndexFound = true; 1836 break; 1837 } 1838 } 1839 if (blockIndexFound) continue; 1840 return i; 1841 } 1842 1843 // No available index found, the pool has to grow 1844 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1845 return length; 1846 } 1847 1848 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1849 final boolean translate = cursorOffsetVertical != 0; 1850 if (translate) canvas.translate(0, cursorOffsetVertical); 1851 if (mCursorDrawable != null) { 1852 mCursorDrawable.draw(canvas); 1853 } 1854 if (translate) canvas.translate(0, -cursorOffsetVertical); 1855 } 1856 1857 void invalidateHandlesAndActionMode() { 1858 if (mSelectionModifierCursorController != null) { 1859 mSelectionModifierCursorController.invalidateHandles(); 1860 } 1861 if (mInsertionPointCursorController != null) { 1862 mInsertionPointCursorController.invalidateHandle(); 1863 } 1864 if (mTextActionMode != null) { 1865 invalidateActionMode(); 1866 } 1867 } 1868 1869 /** 1870 * Invalidates all the sub-display lists that overlap the specified character range 1871 */ 1872 void invalidateTextDisplayList(Layout layout, int start, int end) { 1873 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1874 final int firstLine = layout.getLineForOffset(start); 1875 final int lastLine = layout.getLineForOffset(end); 1876 1877 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1878 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1879 int[] blockIndices = dynamicLayout.getBlockIndices(); 1880 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1881 1882 int i = 0; 1883 // Skip the blocks before firstLine 1884 while (i < numberOfBlocks) { 1885 if (blockEndLines[i] >= firstLine) break; 1886 i++; 1887 } 1888 1889 // Invalidate all subsequent blocks until lastLine is passed 1890 while (i < numberOfBlocks) { 1891 final int blockIndex = blockIndices[i]; 1892 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1893 mTextRenderNodes[blockIndex].isDirty = true; 1894 } 1895 if (blockEndLines[i] >= lastLine) break; 1896 i++; 1897 } 1898 } 1899 } 1900 1901 void invalidateTextDisplayList() { 1902 if (mTextRenderNodes != null) { 1903 for (int i = 0; i < mTextRenderNodes.length; i++) { 1904 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1905 } 1906 } 1907 } 1908 1909 void updateCursorPosition() { 1910 if (mTextView.mCursorDrawableRes == 0) { 1911 mCursorDrawable = null; 1912 return; 1913 } 1914 1915 final Layout layout = mTextView.getLayout(); 1916 final int offset = mTextView.getSelectionStart(); 1917 final int line = layout.getLineForOffset(offset); 1918 final int top = layout.getLineTop(line); 1919 final int bottom = layout.getLineTop(line + 1); 1920 1921 final boolean clamped = layout.shouldClampCursor(line); 1922 updateCursorPosition(top, bottom, layout.getPrimaryHorizontal(offset, clamped)); 1923 } 1924 1925 void refreshTextActionMode() { 1926 if (extractedTextModeWillBeStarted()) { 1927 mRestartActionModeOnNextRefresh = false; 1928 return; 1929 } 1930 final boolean hasSelection = mTextView.hasSelection(); 1931 final SelectionModifierCursorController selectionController = getSelectionController(); 1932 final InsertionPointCursorController insertionController = getInsertionController(); 1933 if ((selectionController != null && selectionController.isCursorBeingModified()) 1934 || (insertionController != null && insertionController.isCursorBeingModified())) { 1935 // ActionMode should be managed by the currently active cursor controller. 1936 mRestartActionModeOnNextRefresh = false; 1937 return; 1938 } 1939 if (hasSelection) { 1940 hideInsertionPointCursorController(); 1941 if (mTextActionMode == null) { 1942 if (mRestartActionModeOnNextRefresh) { 1943 // To avoid distraction, newly start action mode only when selection action 1944 // mode is being restarted. 1945 startSelectionActionModeAsync(false); 1946 } 1947 } else if (selectionController == null || !selectionController.isActive()) { 1948 // Insertion action mode is active. Avoid dismissing the selection. 1949 stopTextActionModeWithPreservingSelection(); 1950 startSelectionActionModeAsync(false); 1951 } else { 1952 mTextActionMode.invalidateContentRect(); 1953 } 1954 } else { 1955 // Insertion action mode is started only when insertion controller is explicitly 1956 // activated. 1957 if (insertionController == null || !insertionController.isActive()) { 1958 stopTextActionMode(); 1959 } else if (mTextActionMode != null) { 1960 mTextActionMode.invalidateContentRect(); 1961 } 1962 } 1963 mRestartActionModeOnNextRefresh = false; 1964 } 1965 1966 /** 1967 * Start an Insertion action mode. 1968 */ 1969 void startInsertionActionMode() { 1970 if (mInsertionActionModeRunnable != null) { 1971 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1972 } 1973 if (extractedTextModeWillBeStarted()) { 1974 return; 1975 } 1976 stopTextActionMode(); 1977 1978 ActionMode.Callback actionModeCallback = 1979 new TextActionModeCallback(false /* hasSelection */); 1980 mTextActionMode = mTextView.startActionMode( 1981 actionModeCallback, ActionMode.TYPE_FLOATING); 1982 if (mTextActionMode != null && getInsertionController() != null) { 1983 getInsertionController().show(); 1984 } 1985 } 1986 1987 @NonNull 1988 TextView getTextView() { 1989 return mTextView; 1990 } 1991 1992 @Nullable 1993 ActionMode getTextActionMode() { 1994 return mTextActionMode; 1995 } 1996 1997 void setRestartActionModeOnNextRefresh(boolean value) { 1998 mRestartActionModeOnNextRefresh = value; 1999 } 2000 2001 /** 2002 * Asynchronously starts a selection action mode using the TextClassifier. 2003 */ 2004 void startSelectionActionModeAsync(boolean adjustSelection) { 2005 getSelectionActionModeHelper().startActionModeAsync(adjustSelection); 2006 } 2007 2008 /** 2009 * Asynchronously invalidates an action mode using the TextClassifier. 2010 */ 2011 void invalidateActionModeAsync() { 2012 getSelectionActionModeHelper().invalidateActionModeAsync(); 2013 } 2014 2015 /** 2016 * Synchronously invalidates an action mode without the TextClassifier. 2017 */ 2018 private void invalidateActionMode() { 2019 if (mTextActionMode != null) { 2020 mTextActionMode.invalidate(); 2021 } 2022 } 2023 2024 private SelectionActionModeHelper getSelectionActionModeHelper() { 2025 if (mSelectionActionModeHelper == null) { 2026 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2027 } 2028 return mSelectionActionModeHelper; 2029 } 2030 2031 /** 2032 * If the TextView allows text selection, selects the current word when no existing selection 2033 * was available and starts a drag. 2034 * 2035 * @return true if the drag was started. 2036 */ 2037 private boolean selectCurrentWordAndStartDrag() { 2038 if (mInsertionActionModeRunnable != null) { 2039 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2040 } 2041 if (extractedTextModeWillBeStarted()) { 2042 return false; 2043 } 2044 if (!checkField()) { 2045 return false; 2046 } 2047 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2048 // No selection and cannot select a word. 2049 return false; 2050 } 2051 stopTextActionModeWithPreservingSelection(); 2052 getSelectionController().enterDrag( 2053 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2054 return true; 2055 } 2056 2057 /** 2058 * Checks whether a selection can be performed on the current TextView. 2059 * 2060 * @return true if a selection can be performed 2061 */ 2062 boolean checkField() { 2063 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2064 Log.w(TextView.LOG_TAG, 2065 "TextView does not support text selection. Selection cancelled."); 2066 return false; 2067 } 2068 return true; 2069 } 2070 2071 boolean startSelectionActionModeInternal() { 2072 if (extractedTextModeWillBeStarted()) { 2073 return false; 2074 } 2075 if (mTextActionMode != null) { 2076 // Text action mode is already started 2077 invalidateActionMode(); 2078 return false; 2079 } 2080 2081 if (!checkField() || !mTextView.hasSelection()) { 2082 return false; 2083 } 2084 2085 ActionMode.Callback actionModeCallback = 2086 new TextActionModeCallback(true /* hasSelection */); 2087 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2088 2089 final boolean selectionStarted = mTextActionMode != null; 2090 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2091 // Show the IME to be able to replace text, except when selecting non editable text. 2092 final InputMethodManager imm = InputMethodManager.peekInstance(); 2093 if (imm != null) { 2094 imm.showSoftInput(mTextView, 0, null); 2095 } 2096 } 2097 return selectionStarted; 2098 } 2099 2100 private boolean extractedTextModeWillBeStarted() { 2101 if (!(mTextView.isInExtractedMode())) { 2102 final InputMethodManager imm = InputMethodManager.peekInstance(); 2103 return imm != null && imm.isFullscreenMode(); 2104 } 2105 return false; 2106 } 2107 2108 /** 2109 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2110 * the current cursor position or selection range. This method is consistent with the 2111 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2112 */ 2113 private boolean shouldOfferToShowSuggestions() { 2114 CharSequence text = mTextView.getText(); 2115 if (!(text instanceof Spannable)) return false; 2116 2117 final Spannable spannable = (Spannable) text; 2118 final int selectionStart = mTextView.getSelectionStart(); 2119 final int selectionEnd = mTextView.getSelectionEnd(); 2120 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2121 SuggestionSpan.class); 2122 if (suggestionSpans.length == 0) { 2123 return false; 2124 } 2125 if (selectionStart == selectionEnd) { 2126 // Spans overlap the cursor. 2127 for (int i = 0; i < suggestionSpans.length; i++) { 2128 if (suggestionSpans[i].getSuggestions().length > 0) { 2129 return true; 2130 } 2131 } 2132 return false; 2133 } 2134 int minSpanStart = mTextView.getText().length(); 2135 int maxSpanEnd = 0; 2136 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2137 int unionOfSpansCoveringSelectionStartEnd = 0; 2138 boolean hasValidSuggestions = false; 2139 for (int i = 0; i < suggestionSpans.length; i++) { 2140 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2141 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2142 minSpanStart = Math.min(minSpanStart, spanStart); 2143 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2144 if (selectionStart < spanStart || selectionStart > spanEnd) { 2145 // The span doesn't cover the current selection start point. 2146 continue; 2147 } 2148 hasValidSuggestions = 2149 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2150 unionOfSpansCoveringSelectionStartStart = 2151 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2152 unionOfSpansCoveringSelectionStartEnd = 2153 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2154 } 2155 if (!hasValidSuggestions) { 2156 return false; 2157 } 2158 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2159 // No spans cover the selection start point. 2160 return false; 2161 } 2162 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2163 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2164 // There is a span that is not covered by the union. In this case, we soouldn't offer 2165 // to show suggestions as it's confusing. 2166 return false; 2167 } 2168 return true; 2169 } 2170 2171 /** 2172 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2173 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2174 */ 2175 private boolean isCursorInsideEasyCorrectionSpan() { 2176 Spannable spannable = (Spannable) mTextView.getText(); 2177 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2178 mTextView.getSelectionEnd(), SuggestionSpan.class); 2179 for (int i = 0; i < suggestionSpans.length; i++) { 2180 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2181 return true; 2182 } 2183 } 2184 return false; 2185 } 2186 2187 void onTouchUpEvent(MotionEvent event) { 2188 if (getSelectionActionModeHelper().resetSelection( 2189 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2190 return; 2191 } 2192 2193 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2194 hideCursorAndSpanControllers(); 2195 stopTextActionMode(); 2196 CharSequence text = mTextView.getText(); 2197 if (!selectAllGotFocus && text.length() > 0) { 2198 // Move cursor 2199 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2200 Selection.setSelection((Spannable) text, offset); 2201 if (mSpellChecker != null) { 2202 // When the cursor moves, the word that was typed may need spell check 2203 mSpellChecker.onSelectionChanged(); 2204 } 2205 2206 if (!extractedTextModeWillBeStarted()) { 2207 if (isCursorInsideEasyCorrectionSpan()) { 2208 // Cancel the single tap delayed runnable. 2209 if (mInsertionActionModeRunnable != null) { 2210 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2211 } 2212 2213 mShowSuggestionRunnable = new Runnable() { 2214 public void run() { 2215 replace(); 2216 } 2217 }; 2218 // removeCallbacks is performed on every touch 2219 mTextView.postDelayed(mShowSuggestionRunnable, 2220 ViewConfiguration.getDoubleTapTimeout()); 2221 } else if (hasInsertionController()) { 2222 getInsertionController().show(); 2223 } 2224 } 2225 } 2226 } 2227 2228 protected void stopTextActionMode() { 2229 if (mTextActionMode != null) { 2230 // This will hide the mSelectionModifierCursorController 2231 mTextActionMode.finish(); 2232 } 2233 } 2234 2235 private void stopTextActionModeWithPreservingSelection() { 2236 if (mTextActionMode != null) { 2237 mRestartActionModeOnNextRefresh = true; 2238 } 2239 mPreserveSelection = true; 2240 stopTextActionMode(); 2241 mPreserveSelection = false; 2242 } 2243 2244 /** 2245 * @return True if this view supports insertion handles. 2246 */ 2247 boolean hasInsertionController() { 2248 return mInsertionControllerEnabled; 2249 } 2250 2251 /** 2252 * @return True if this view supports selection handles. 2253 */ 2254 boolean hasSelectionController() { 2255 return mSelectionControllerEnabled; 2256 } 2257 2258 private InsertionPointCursorController getInsertionController() { 2259 if (!mInsertionControllerEnabled) { 2260 return null; 2261 } 2262 2263 if (mInsertionPointCursorController == null) { 2264 mInsertionPointCursorController = new InsertionPointCursorController(); 2265 2266 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2267 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2268 } 2269 2270 return mInsertionPointCursorController; 2271 } 2272 2273 @Nullable 2274 SelectionModifierCursorController getSelectionController() { 2275 if (!mSelectionControllerEnabled) { 2276 return null; 2277 } 2278 2279 if (mSelectionModifierCursorController == null) { 2280 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2281 2282 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2283 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2284 } 2285 2286 return mSelectionModifierCursorController; 2287 } 2288 2289 @VisibleForTesting 2290 @Nullable 2291 public Drawable getCursorDrawable() { 2292 return mCursorDrawable; 2293 } 2294 2295 private void updateCursorPosition(int top, int bottom, float horizontal) { 2296 if (mCursorDrawable == null) { 2297 mCursorDrawable = mTextView.getContext().getDrawable( 2298 mTextView.mCursorDrawableRes); 2299 } 2300 final int left = clampHorizontalPosition(mCursorDrawable, horizontal); 2301 final int width = mCursorDrawable.getIntrinsicWidth(); 2302 mCursorDrawable.setBounds(left, top - mTempRect.top, left + width, 2303 bottom + mTempRect.bottom); 2304 } 2305 2306 /** 2307 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2308 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2309 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2310 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2311 * of the view. 2312 * 2313 * @param drawable Drawable. Can be null. 2314 * @param horizontal Horizontal position for the drawable. 2315 * @return The clamped horizontal position for the drawable. 2316 */ 2317 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2318 horizontal = Math.max(0.5f, horizontal - 0.5f); 2319 if (mTempRect == null) mTempRect = new Rect(); 2320 2321 int drawableWidth = 0; 2322 if (drawable != null) { 2323 drawable.getPadding(mTempRect); 2324 drawableWidth = drawable.getIntrinsicWidth(); 2325 } else { 2326 mTempRect.setEmpty(); 2327 } 2328 2329 int scrollX = mTextView.getScrollX(); 2330 float horizontalDiff = horizontal - scrollX; 2331 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2332 - mTextView.getCompoundPaddingRight(); 2333 2334 final int left; 2335 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2336 // at the rightmost position 2337 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2338 } else if (Math.abs(horizontalDiff) <= 1f 2339 || (TextUtils.isEmpty(mTextView.getText()) 2340 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2341 && horizontal <= 1f)) { 2342 // at the leftmost position 2343 left = scrollX - mTempRect.left; 2344 } else { 2345 left = (int) horizontal - mTempRect.left; 2346 } 2347 return left; 2348 } 2349 2350 /** 2351 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2352 * a dictionary) from the current input method, provided by it calling 2353 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2354 * implementation flashes the background of the corrected word to provide feedback to the user. 2355 * 2356 * @param info The auto correct info about the text that was corrected. 2357 */ 2358 public void onCommitCorrection(CorrectionInfo info) { 2359 if (mCorrectionHighlighter == null) { 2360 mCorrectionHighlighter = new CorrectionHighlighter(); 2361 } else { 2362 mCorrectionHighlighter.invalidate(false); 2363 } 2364 2365 mCorrectionHighlighter.highlight(info); 2366 mUndoInputFilter.freezeLastEdit(); 2367 } 2368 2369 void onScrollChanged() { 2370 if (mPositionListener != null) { 2371 mPositionListener.onScrollChanged(); 2372 } 2373 if (mTextActionMode != null) { 2374 mTextActionMode.invalidateContentRect(); 2375 } 2376 } 2377 2378 /** 2379 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2380 */ 2381 private boolean shouldBlink() { 2382 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2383 2384 final int start = mTextView.getSelectionStart(); 2385 if (start < 0) return false; 2386 2387 final int end = mTextView.getSelectionEnd(); 2388 if (end < 0) return false; 2389 2390 return start == end; 2391 } 2392 2393 void makeBlink() { 2394 if (shouldBlink()) { 2395 mShowCursor = SystemClock.uptimeMillis(); 2396 if (mBlink == null) mBlink = new Blink(); 2397 mTextView.removeCallbacks(mBlink); 2398 mTextView.postDelayed(mBlink, BLINK); 2399 } else { 2400 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2401 } 2402 } 2403 2404 private class Blink implements Runnable { 2405 private boolean mCancelled; 2406 2407 public void run() { 2408 if (mCancelled) { 2409 return; 2410 } 2411 2412 mTextView.removeCallbacks(this); 2413 2414 if (shouldBlink()) { 2415 if (mTextView.getLayout() != null) { 2416 mTextView.invalidateCursorPath(); 2417 } 2418 2419 mTextView.postDelayed(this, BLINK); 2420 } 2421 } 2422 2423 void cancel() { 2424 if (!mCancelled) { 2425 mTextView.removeCallbacks(this); 2426 mCancelled = true; 2427 } 2428 } 2429 2430 void uncancel() { 2431 mCancelled = false; 2432 } 2433 } 2434 2435 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2436 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2437 com.android.internal.R.layout.text_drag_thumbnail, null); 2438 2439 if (shadowView == null) { 2440 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2441 } 2442 2443 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2444 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2445 end = TextUtils.unpackRangeEndFromLong(range); 2446 } 2447 final CharSequence text = mTextView.getTransformedText(start, end); 2448 shadowView.setText(text); 2449 shadowView.setTextColor(mTextView.getTextColors()); 2450 2451 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2452 shadowView.setGravity(Gravity.CENTER); 2453 2454 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2455 ViewGroup.LayoutParams.WRAP_CONTENT)); 2456 2457 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2458 shadowView.measure(size, size); 2459 2460 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2461 shadowView.invalidate(); 2462 return new DragShadowBuilder(shadowView); 2463 } 2464 2465 private static class DragLocalState { 2466 public TextView sourceTextView; 2467 public int start, end; 2468 2469 public DragLocalState(TextView sourceTextView, int start, int end) { 2470 this.sourceTextView = sourceTextView; 2471 this.start = start; 2472 this.end = end; 2473 } 2474 } 2475 2476 void onDrop(DragEvent event) { 2477 SpannableStringBuilder content = new SpannableStringBuilder(); 2478 2479 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2480 if (permissions != null) { 2481 permissions.takeTransient(); 2482 } 2483 2484 try { 2485 ClipData clipData = event.getClipData(); 2486 final int itemCount = clipData.getItemCount(); 2487 for (int i = 0; i < itemCount; i++) { 2488 Item item = clipData.getItemAt(i); 2489 content.append(item.coerceToStyledText(mTextView.getContext())); 2490 } 2491 } finally { 2492 if (permissions != null) { 2493 permissions.release(); 2494 } 2495 } 2496 2497 mTextView.beginBatchEdit(); 2498 mUndoInputFilter.freezeLastEdit(); 2499 try { 2500 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2501 Object localState = event.getLocalState(); 2502 DragLocalState dragLocalState = null; 2503 if (localState instanceof DragLocalState) { 2504 dragLocalState = (DragLocalState) localState; 2505 } 2506 boolean dragDropIntoItself = dragLocalState != null 2507 && dragLocalState.sourceTextView == mTextView; 2508 2509 if (dragDropIntoItself) { 2510 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2511 // A drop inside the original selection discards the drop. 2512 return; 2513 } 2514 } 2515 2516 final int originalLength = mTextView.getText().length(); 2517 int min = offset; 2518 int max = offset; 2519 2520 Selection.setSelection((Spannable) mTextView.getText(), max); 2521 mTextView.replaceText_internal(min, max, content); 2522 2523 if (dragDropIntoItself) { 2524 int dragSourceStart = dragLocalState.start; 2525 int dragSourceEnd = dragLocalState.end; 2526 if (max <= dragSourceStart) { 2527 // Inserting text before selection has shifted positions 2528 final int shift = mTextView.getText().length() - originalLength; 2529 dragSourceStart += shift; 2530 dragSourceEnd += shift; 2531 } 2532 2533 // Delete original selection 2534 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2535 2536 // Make sure we do not leave two adjacent spaces. 2537 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2538 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2539 if (nextCharIdx > prevCharIdx + 1) { 2540 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2541 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2542 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2543 } 2544 } 2545 } 2546 } finally { 2547 mTextView.endBatchEdit(); 2548 mUndoInputFilter.freezeLastEdit(); 2549 } 2550 } 2551 2552 public void addSpanWatchers(Spannable text) { 2553 final int textLength = text.length(); 2554 2555 if (mKeyListener != null) { 2556 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2557 } 2558 2559 if (mSpanController == null) { 2560 mSpanController = new SpanController(); 2561 } 2562 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2563 } 2564 2565 void setContextMenuAnchor(float x, float y) { 2566 mContextMenuAnchorX = x; 2567 mContextMenuAnchorY = y; 2568 } 2569 2570 void onCreateContextMenu(ContextMenu menu) { 2571 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2572 || Float.isNaN(mContextMenuAnchorY)) { 2573 return; 2574 } 2575 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2576 if (offset == -1) { 2577 return; 2578 } 2579 2580 stopTextActionModeWithPreservingSelection(); 2581 if (mTextView.canSelectText()) { 2582 final boolean isOnSelection = mTextView.hasSelection() 2583 && offset >= mTextView.getSelectionStart() 2584 && offset <= mTextView.getSelectionEnd(); 2585 if (!isOnSelection) { 2586 // Right clicked position is not on the selection. Remove the selection and move the 2587 // cursor to the right clicked position. 2588 Selection.setSelection((Spannable) mTextView.getText(), offset); 2589 stopTextActionMode(); 2590 } 2591 } 2592 2593 if (shouldOfferToShowSuggestions()) { 2594 final SuggestionInfo[] suggestionInfoArray = 2595 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2596 for (int i = 0; i < suggestionInfoArray.length; i++) { 2597 suggestionInfoArray[i] = new SuggestionInfo(); 2598 } 2599 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2600 com.android.internal.R.string.replace); 2601 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2602 for (int i = 0; i < numItems; i++) { 2603 final SuggestionInfo info = suggestionInfoArray[i]; 2604 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2605 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2606 @Override 2607 public boolean onMenuItemClick(MenuItem item) { 2608 replaceWithSuggestion(info); 2609 return true; 2610 } 2611 }); 2612 } 2613 } 2614 2615 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2616 com.android.internal.R.string.undo) 2617 .setAlphabeticShortcut('z') 2618 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2619 .setEnabled(mTextView.canUndo()); 2620 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2621 com.android.internal.R.string.redo) 2622 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2623 .setEnabled(mTextView.canRedo()); 2624 2625 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2626 com.android.internal.R.string.cut) 2627 .setAlphabeticShortcut('x') 2628 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2629 .setEnabled(mTextView.canCut()); 2630 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2631 com.android.internal.R.string.copy) 2632 .setAlphabeticShortcut('c') 2633 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2634 .setEnabled(mTextView.canCopy()); 2635 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2636 com.android.internal.R.string.paste) 2637 .setAlphabeticShortcut('v') 2638 .setEnabled(mTextView.canPaste()) 2639 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2640 menu.add(Menu.NONE, TextView.ID_PASTE_AS_PLAIN_TEXT, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2641 com.android.internal.R.string.paste_as_plain_text) 2642 .setEnabled(mTextView.canPasteAsPlainText()) 2643 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2644 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2645 com.android.internal.R.string.share) 2646 .setEnabled(mTextView.canShare()) 2647 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2648 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2649 com.android.internal.R.string.selectAll) 2650 .setAlphabeticShortcut('a') 2651 .setEnabled(mTextView.canSelectAllText()) 2652 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2653 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2654 android.R.string.autofill) 2655 .setEnabled(mTextView.canRequestAutofill()) 2656 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2657 2658 mPreserveSelection = true; 2659 } 2660 2661 @Nullable 2662 private SuggestionSpan findEquivalentSuggestionSpan( 2663 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2664 final Editable editable = (Editable) mTextView.getText(); 2665 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2666 // Exactly same span is found. 2667 return suggestionSpanInfo.mSuggestionSpan; 2668 } 2669 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2670 // contents. 2671 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2672 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2673 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2674 final int start = editable.getSpanStart(suggestionSpan); 2675 if (start != suggestionSpanInfo.mSpanStart) { 2676 continue; 2677 } 2678 final int end = editable.getSpanEnd(suggestionSpan); 2679 if (end != suggestionSpanInfo.mSpanEnd) { 2680 continue; 2681 } 2682 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2683 return suggestionSpan; 2684 } 2685 } 2686 return null; 2687 } 2688 2689 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2690 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2691 suggestionInfo.mSuggestionSpanInfo); 2692 if (targetSuggestionSpan == null) { 2693 // Span has been removed 2694 return; 2695 } 2696 final Editable editable = (Editable) mTextView.getText(); 2697 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2698 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2699 if (spanStart < 0 || spanEnd <= spanStart) { 2700 // Span has been removed 2701 return; 2702 } 2703 2704 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2705 // SuggestionSpans are removed by replace: save them before 2706 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2707 SuggestionSpan.class); 2708 final int length = suggestionSpans.length; 2709 int[] suggestionSpansStarts = new int[length]; 2710 int[] suggestionSpansEnds = new int[length]; 2711 int[] suggestionSpansFlags = new int[length]; 2712 for (int i = 0; i < length; i++) { 2713 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2714 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2715 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2716 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2717 2718 // Remove potential misspelled flags 2719 int suggestionSpanFlags = suggestionSpan.getFlags(); 2720 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2721 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2722 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2723 suggestionSpan.setFlags(suggestionSpanFlags); 2724 } 2725 } 2726 2727 // Notify source IME of the suggestion pick. Do this before swapping texts. 2728 targetSuggestionSpan.notifySelection( 2729 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2730 2731 // Swap text content between actual text and Suggestion span 2732 final int suggestionStart = suggestionInfo.mSuggestionStart; 2733 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2734 final String suggestion = suggestionInfo.mText.subSequence( 2735 suggestionStart, suggestionEnd).toString(); 2736 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2737 2738 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2739 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2740 2741 // Restore previous SuggestionSpans 2742 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2743 for (int i = 0; i < length; i++) { 2744 // Only spans that include the modified region make sense after replacement 2745 // Spans partially included in the replaced region are removed, there is no 2746 // way to assign them a valid range after replacement 2747 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2748 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2749 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2750 } 2751 } 2752 // Move cursor at the end of the replaced word 2753 final int newCursorPosition = spanEnd + lengthDelta; 2754 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2755 } 2756 2757 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2758 new MenuItem.OnMenuItemClickListener() { 2759 @Override 2760 public boolean onMenuItemClick(MenuItem item) { 2761 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2762 return true; 2763 } 2764 return mTextView.onTextContextMenuItem(item.getItemId()); 2765 } 2766 }; 2767 2768 /** 2769 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2770 * pop-up should be displayed. 2771 * Also monitors {@link Selection} to call back to the attached input method. 2772 */ 2773 private class SpanController implements SpanWatcher { 2774 2775 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2776 2777 private EasyEditPopupWindow mPopupWindow; 2778 2779 private Runnable mHidePopup; 2780 2781 // This function is pure but inner classes can't have static functions 2782 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2783 final Object span) { 2784 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2785 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2786 } 2787 2788 @Override 2789 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2790 if (isNonIntermediateSelectionSpan(text, span)) { 2791 sendUpdateSelection(); 2792 } else if (span instanceof EasyEditSpan) { 2793 if (mPopupWindow == null) { 2794 mPopupWindow = new EasyEditPopupWindow(); 2795 mHidePopup = new Runnable() { 2796 @Override 2797 public void run() { 2798 hide(); 2799 } 2800 }; 2801 } 2802 2803 // Make sure there is only at most one EasyEditSpan in the text 2804 if (mPopupWindow.mEasyEditSpan != null) { 2805 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2806 } 2807 2808 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2809 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2810 @Override 2811 public void onDeleteClick(EasyEditSpan span) { 2812 Editable editable = (Editable) mTextView.getText(); 2813 int start = editable.getSpanStart(span); 2814 int end = editable.getSpanEnd(span); 2815 if (start >= 0 && end >= 0) { 2816 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2817 mTextView.deleteText_internal(start, end); 2818 } 2819 editable.removeSpan(span); 2820 } 2821 }); 2822 2823 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2824 // The window is not visible yet, ignore the text change. 2825 return; 2826 } 2827 2828 if (mTextView.getLayout() == null) { 2829 // The view has not been laid out yet, ignore the text change 2830 return; 2831 } 2832 2833 if (extractedTextModeWillBeStarted()) { 2834 // The input is in extract mode. Do not handle the easy edit in 2835 // the original TextView, as the ExtractEditText will do 2836 return; 2837 } 2838 2839 mPopupWindow.show(); 2840 mTextView.removeCallbacks(mHidePopup); 2841 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2842 } 2843 } 2844 2845 @Override 2846 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2847 if (isNonIntermediateSelectionSpan(text, span)) { 2848 sendUpdateSelection(); 2849 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2850 hide(); 2851 } 2852 } 2853 2854 @Override 2855 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2856 int newStart, int newEnd) { 2857 if (isNonIntermediateSelectionSpan(text, span)) { 2858 sendUpdateSelection(); 2859 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2860 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2861 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2862 text.removeSpan(easyEditSpan); 2863 } 2864 } 2865 2866 public void hide() { 2867 if (mPopupWindow != null) { 2868 mPopupWindow.hide(); 2869 mTextView.removeCallbacks(mHidePopup); 2870 } 2871 } 2872 2873 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2874 try { 2875 PendingIntent pendingIntent = span.getPendingIntent(); 2876 if (pendingIntent != null) { 2877 Intent intent = new Intent(); 2878 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2879 pendingIntent.send(mTextView.getContext(), 0, intent); 2880 } 2881 } catch (CanceledException e) { 2882 // This should not happen, as we should try to send the intent only once. 2883 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2884 } 2885 } 2886 } 2887 2888 /** 2889 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2890 */ 2891 private interface EasyEditDeleteListener { 2892 2893 /** 2894 * Clicks the delete pop-up. 2895 */ 2896 void onDeleteClick(EasyEditSpan span); 2897 } 2898 2899 /** 2900 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2901 * by {@link SpanController}. 2902 */ 2903 private class EasyEditPopupWindow extends PinnedPopupWindow 2904 implements OnClickListener { 2905 private static final int POPUP_TEXT_LAYOUT = 2906 com.android.internal.R.layout.text_edit_action_popup_text; 2907 private TextView mDeleteTextView; 2908 private EasyEditSpan mEasyEditSpan; 2909 private EasyEditDeleteListener mOnDeleteListener; 2910 2911 @Override 2912 protected void createPopupWindow() { 2913 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2914 com.android.internal.R.attr.textSelectHandleWindowStyle); 2915 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2916 mPopupWindow.setClippingEnabled(true); 2917 } 2918 2919 @Override 2920 protected void initContentView() { 2921 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2922 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2923 mContentView = linearLayout; 2924 mContentView.setBackgroundResource( 2925 com.android.internal.R.drawable.text_edit_side_paste_window); 2926 2927 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 2928 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2929 2930 LayoutParams wrapContent = new LayoutParams( 2931 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2932 2933 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2934 mDeleteTextView.setLayoutParams(wrapContent); 2935 mDeleteTextView.setText(com.android.internal.R.string.delete); 2936 mDeleteTextView.setOnClickListener(this); 2937 mContentView.addView(mDeleteTextView); 2938 } 2939 2940 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2941 mEasyEditSpan = easyEditSpan; 2942 } 2943 2944 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2945 mOnDeleteListener = listener; 2946 } 2947 2948 @Override 2949 public void onClick(View view) { 2950 if (view == mDeleteTextView 2951 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2952 && mOnDeleteListener != null) { 2953 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2954 } 2955 } 2956 2957 @Override 2958 public void hide() { 2959 if (mEasyEditSpan != null) { 2960 mEasyEditSpan.setDeleteEnabled(false); 2961 } 2962 mOnDeleteListener = null; 2963 super.hide(); 2964 } 2965 2966 @Override 2967 protected int getTextOffset() { 2968 // Place the pop-up at the end of the span 2969 Editable editable = (Editable) mTextView.getText(); 2970 return editable.getSpanEnd(mEasyEditSpan); 2971 } 2972 2973 @Override 2974 protected int getVerticalLocalPosition(int line) { 2975 return mTextView.getLayout().getLineBottom(line); 2976 } 2977 2978 @Override 2979 protected int clipVertically(int positionY) { 2980 // As we display the pop-up below the span, no vertical clipping is required. 2981 return positionY; 2982 } 2983 } 2984 2985 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2986 // 3 handles 2987 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2988 // 1 CursorAnchorInfoNotifier 2989 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2990 private TextViewPositionListener[] mPositionListeners = 2991 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2992 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2993 private boolean mPositionHasChanged = true; 2994 // Absolute position of the TextView with respect to its parent window 2995 private int mPositionX, mPositionY; 2996 private int mPositionXOnScreen, mPositionYOnScreen; 2997 private int mNumberOfListeners; 2998 private boolean mScrollHasChanged; 2999 final int[] mTempCoords = new int[2]; 3000 3001 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 3002 if (mNumberOfListeners == 0) { 3003 updatePosition(); 3004 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3005 vto.addOnPreDrawListener(this); 3006 } 3007 3008 int emptySlotIndex = -1; 3009 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3010 TextViewPositionListener listener = mPositionListeners[i]; 3011 if (listener == positionListener) { 3012 return; 3013 } else if (emptySlotIndex < 0 && listener == null) { 3014 emptySlotIndex = i; 3015 } 3016 } 3017 3018 mPositionListeners[emptySlotIndex] = positionListener; 3019 mCanMove[emptySlotIndex] = canMove; 3020 mNumberOfListeners++; 3021 } 3022 3023 public void removeSubscriber(TextViewPositionListener positionListener) { 3024 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3025 if (mPositionListeners[i] == positionListener) { 3026 mPositionListeners[i] = null; 3027 mNumberOfListeners--; 3028 break; 3029 } 3030 } 3031 3032 if (mNumberOfListeners == 0) { 3033 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3034 vto.removeOnPreDrawListener(this); 3035 } 3036 } 3037 3038 public int getPositionX() { 3039 return mPositionX; 3040 } 3041 3042 public int getPositionY() { 3043 return mPositionY; 3044 } 3045 3046 public int getPositionXOnScreen() { 3047 return mPositionXOnScreen; 3048 } 3049 3050 public int getPositionYOnScreen() { 3051 return mPositionYOnScreen; 3052 } 3053 3054 @Override 3055 public boolean onPreDraw() { 3056 updatePosition(); 3057 3058 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3059 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3060 TextViewPositionListener positionListener = mPositionListeners[i]; 3061 if (positionListener != null) { 3062 positionListener.updatePosition(mPositionX, mPositionY, 3063 mPositionHasChanged, mScrollHasChanged); 3064 } 3065 } 3066 } 3067 3068 mScrollHasChanged = false; 3069 return true; 3070 } 3071 3072 private void updatePosition() { 3073 mTextView.getLocationInWindow(mTempCoords); 3074 3075 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3076 3077 mPositionX = mTempCoords[0]; 3078 mPositionY = mTempCoords[1]; 3079 3080 mTextView.getLocationOnScreen(mTempCoords); 3081 3082 mPositionXOnScreen = mTempCoords[0]; 3083 mPositionYOnScreen = mTempCoords[1]; 3084 } 3085 3086 public void onScrollChanged() { 3087 mScrollHasChanged = true; 3088 } 3089 } 3090 3091 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3092 protected PopupWindow mPopupWindow; 3093 protected ViewGroup mContentView; 3094 int mPositionX, mPositionY; 3095 int mClippingLimitLeft, mClippingLimitRight; 3096 3097 protected abstract void createPopupWindow(); 3098 protected abstract void initContentView(); 3099 protected abstract int getTextOffset(); 3100 protected abstract int getVerticalLocalPosition(int line); 3101 protected abstract int clipVertically(int positionY); 3102 protected void setUp() { 3103 } 3104 3105 public PinnedPopupWindow() { 3106 // Due to calling subclass methods in base constructor, subclass constructor is not 3107 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3108 // a chance to initialize subclasses, call setUp() method here. 3109 // TODO: It is good to extract non trivial initialization code from constructor. 3110 setUp(); 3111 3112 createPopupWindow(); 3113 3114 mPopupWindow.setWindowLayoutType( 3115 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3116 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3117 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3118 3119 initContentView(); 3120 3121 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3122 ViewGroup.LayoutParams.WRAP_CONTENT); 3123 mContentView.setLayoutParams(wrapContent); 3124 3125 mPopupWindow.setContentView(mContentView); 3126 } 3127 3128 public void show() { 3129 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3130 3131 computeLocalPosition(); 3132 3133 final PositionListener positionListener = getPositionListener(); 3134 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3135 } 3136 3137 protected void measureContent() { 3138 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3139 mContentView.measure( 3140 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3141 View.MeasureSpec.AT_MOST), 3142 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3143 View.MeasureSpec.AT_MOST)); 3144 } 3145 3146 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3147 * positioned according to viewportToContentHorizontalOffset. 3148 * 3149 * This method assumes that mContentView has properly been measured from its content. */ 3150 private void computeLocalPosition() { 3151 measureContent(); 3152 final int width = mContentView.getMeasuredWidth(); 3153 final int offset = getTextOffset(); 3154 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3155 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3156 3157 final int line = mTextView.getLayout().getLineForOffset(offset); 3158 mPositionY = getVerticalLocalPosition(line); 3159 mPositionY += mTextView.viewportToContentVerticalOffset(); 3160 } 3161 3162 private void updatePosition(int parentPositionX, int parentPositionY) { 3163 int positionX = parentPositionX + mPositionX; 3164 int positionY = parentPositionY + mPositionY; 3165 3166 positionY = clipVertically(positionY); 3167 3168 // Horizontal clipping 3169 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3170 final int width = mContentView.getMeasuredWidth(); 3171 positionX = Math.min( 3172 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3173 positionX = Math.max(-mClippingLimitLeft, positionX); 3174 3175 if (isShowing()) { 3176 mPopupWindow.update(positionX, positionY, -1, -1); 3177 } else { 3178 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3179 positionX, positionY); 3180 } 3181 } 3182 3183 public void hide() { 3184 if (!isShowing()) { 3185 return; 3186 } 3187 mPopupWindow.dismiss(); 3188 getPositionListener().removeSubscriber(this); 3189 } 3190 3191 @Override 3192 public void updatePosition(int parentPositionX, int parentPositionY, 3193 boolean parentPositionChanged, boolean parentScrolled) { 3194 // Either parentPositionChanged or parentScrolled is true, check if still visible 3195 if (isShowing() && isOffsetVisible(getTextOffset())) { 3196 if (parentScrolled) computeLocalPosition(); 3197 updatePosition(parentPositionX, parentPositionY); 3198 } else { 3199 hide(); 3200 } 3201 } 3202 3203 public boolean isShowing() { 3204 return mPopupWindow.isShowing(); 3205 } 3206 } 3207 3208 private static final class SuggestionInfo { 3209 // Range of actual suggestion within mText 3210 int mSuggestionStart, mSuggestionEnd; 3211 3212 // The SuggestionSpan that this TextView represents 3213 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3214 3215 // The index of this suggestion inside suggestionSpan 3216 int mSuggestionIndex; 3217 3218 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3219 3220 void clear() { 3221 mSuggestionSpanInfo.clear(); 3222 mText.clear(); 3223 } 3224 3225 // Utility method to set attributes about a SuggestionSpan. 3226 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3227 mSuggestionSpanInfo.mSuggestionSpan = span; 3228 mSuggestionSpanInfo.mSpanStart = spanStart; 3229 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3230 } 3231 } 3232 3233 private static final class SuggestionSpanInfo { 3234 // The SuggestionSpan; 3235 @Nullable 3236 SuggestionSpan mSuggestionSpan; 3237 3238 // The SuggestionSpan start position 3239 int mSpanStart; 3240 3241 // The SuggestionSpan end position 3242 int mSpanEnd; 3243 3244 void clear() { 3245 mSuggestionSpan = null; 3246 } 3247 } 3248 3249 private class SuggestionHelper { 3250 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3251 new SuggestionSpanComparator(); 3252 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3253 new HashMap<SuggestionSpan, Integer>(); 3254 3255 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3256 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3257 final int flag1 = span1.getFlags(); 3258 final int flag2 = span2.getFlags(); 3259 if (flag1 != flag2) { 3260 // The order here should match what is used in updateDrawState 3261 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3262 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3263 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3264 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3265 if (easy1 && !misspelled1) return -1; 3266 if (easy2 && !misspelled2) return 1; 3267 if (misspelled1) return -1; 3268 if (misspelled2) return 1; 3269 } 3270 3271 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3272 } 3273 } 3274 3275 /** 3276 * Returns the suggestion spans that cover the current cursor position. The suggestion 3277 * spans are sorted according to the length of text that they are attached to. 3278 */ 3279 private SuggestionSpan[] getSortedSuggestionSpans() { 3280 int pos = mTextView.getSelectionStart(); 3281 Spannable spannable = (Spannable) mTextView.getText(); 3282 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3283 3284 mSpansLengths.clear(); 3285 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3286 int start = spannable.getSpanStart(suggestionSpan); 3287 int end = spannable.getSpanEnd(suggestionSpan); 3288 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3289 } 3290 3291 // The suggestions are sorted according to their types (easy correction first, then 3292 // misspelled) and to the length of the text that they cover (shorter first). 3293 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3294 mSpansLengths.clear(); 3295 3296 return suggestionSpans; 3297 } 3298 3299 /** 3300 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3301 * position. 3302 * 3303 * @param suggestionInfos SuggestionInfo array the results will be set. 3304 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3305 * @return the number of suggestions actually fetched. 3306 */ 3307 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3308 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3309 final Spannable spannable = (Spannable) mTextView.getText(); 3310 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3311 final int nbSpans = suggestionSpans.length; 3312 if (nbSpans == 0) return 0; 3313 3314 int numberOfSuggestions = 0; 3315 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3316 final int spanStart = spannable.getSpanStart(suggestionSpan); 3317 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3318 3319 if (misspelledSpanInfo != null 3320 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3321 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3322 misspelledSpanInfo.mSpanStart = spanStart; 3323 misspelledSpanInfo.mSpanEnd = spanEnd; 3324 } 3325 3326 final String[] suggestions = suggestionSpan.getSuggestions(); 3327 final int nbSuggestions = suggestions.length; 3328 suggestionLoop: 3329 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3330 final String suggestion = suggestions[suggestionIndex]; 3331 for (int i = 0; i < numberOfSuggestions; i++) { 3332 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3333 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3334 final int otherSpanStart = 3335 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3336 final int otherSpanEnd = 3337 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3338 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3339 continue suggestionLoop; 3340 } 3341 } 3342 } 3343 3344 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3345 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3346 suggestionInfo.mSuggestionIndex = suggestionIndex; 3347 suggestionInfo.mSuggestionStart = 0; 3348 suggestionInfo.mSuggestionEnd = suggestion.length(); 3349 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3350 numberOfSuggestions++; 3351 if (numberOfSuggestions >= suggestionInfos.length) { 3352 return numberOfSuggestions; 3353 } 3354 } 3355 } 3356 return numberOfSuggestions; 3357 } 3358 } 3359 3360 @VisibleForTesting 3361 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3362 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3363 3364 // Key of intent extras for inserting new word into user dictionary. 3365 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3366 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3367 3368 private SuggestionInfo[] mSuggestionInfos; 3369 private int mNumberOfSuggestions; 3370 private boolean mCursorWasVisibleBeforeSuggestions; 3371 private boolean mIsShowingUp = false; 3372 private SuggestionAdapter mSuggestionsAdapter; 3373 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3374 private TextView mAddToDictionaryButton; 3375 private TextView mDeleteButton; 3376 private ListView mSuggestionListView; 3377 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3378 private int mContainerMarginWidth; 3379 private int mContainerMarginTop; 3380 private LinearLayout mContainerView; 3381 private Context mContext; // TODO: Make mContext final. 3382 3383 private class CustomPopupWindow extends PopupWindow { 3384 3385 @Override 3386 public void dismiss() { 3387 if (!isShowing()) { 3388 return; 3389 } 3390 super.dismiss(); 3391 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3392 3393 // Safe cast since show() checks that mTextView.getText() is an Editable 3394 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3395 3396 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3397 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3398 getInsertionController().show(); 3399 } 3400 } 3401 } 3402 3403 public SuggestionsPopupWindow() { 3404 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3405 } 3406 3407 @Override 3408 protected void setUp() { 3409 mContext = applyDefaultTheme(mTextView.getContext()); 3410 mHighlightSpan = new TextAppearanceSpan(mContext, 3411 mTextView.mTextEditSuggestionHighlightStyle); 3412 } 3413 3414 private Context applyDefaultTheme(Context originalContext) { 3415 TypedArray a = originalContext.obtainStyledAttributes( 3416 new int[]{com.android.internal.R.attr.isLightTheme}); 3417 boolean isLightTheme = a.getBoolean(0, true); 3418 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3419 : R.style.ThemeOverlay_Material_Dark; 3420 a.recycle(); 3421 return new ContextThemeWrapper(originalContext, themeId); 3422 } 3423 3424 @Override 3425 protected void createPopupWindow() { 3426 mPopupWindow = new CustomPopupWindow(); 3427 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3428 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3429 mPopupWindow.setFocusable(true); 3430 mPopupWindow.setClippingEnabled(false); 3431 } 3432 3433 @Override 3434 protected void initContentView() { 3435 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3436 Context.LAYOUT_INFLATER_SERVICE); 3437 mContentView = (ViewGroup) inflater.inflate( 3438 mTextView.mTextEditSuggestionContainerLayout, null); 3439 3440 mContainerView = (LinearLayout) mContentView.findViewById( 3441 com.android.internal.R.id.suggestionWindowContainer); 3442 ViewGroup.MarginLayoutParams lp = 3443 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3444 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3445 mContainerMarginTop = lp.topMargin; 3446 mClippingLimitLeft = lp.leftMargin; 3447 mClippingLimitRight = lp.rightMargin; 3448 3449 mSuggestionListView = (ListView) mContentView.findViewById( 3450 com.android.internal.R.id.suggestionContainer); 3451 3452 mSuggestionsAdapter = new SuggestionAdapter(); 3453 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3454 mSuggestionListView.setOnItemClickListener(this); 3455 3456 // Inflate the suggestion items once and for all. 3457 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3458 for (int i = 0; i < mSuggestionInfos.length; i++) { 3459 mSuggestionInfos[i] = new SuggestionInfo(); 3460 } 3461 3462 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3463 com.android.internal.R.id.addToDictionaryButton); 3464 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3465 public void onClick(View v) { 3466 final SuggestionSpan misspelledSpan = 3467 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3468 if (misspelledSpan == null) { 3469 // Span has been removed. 3470 return; 3471 } 3472 final Editable editable = (Editable) mTextView.getText(); 3473 final int spanStart = editable.getSpanStart(misspelledSpan); 3474 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3475 if (spanStart < 0 || spanEnd <= spanStart) { 3476 return; 3477 } 3478 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3479 3480 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3481 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3482 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3483 mTextView.getTextServicesLocale().toString()); 3484 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3485 mTextView.getContext().startActivity(intent); 3486 // There is no way to know if the word was indeed added. Re-check. 3487 // TODO The ExtractEditText should remove the span in the original text instead 3488 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3489 Selection.setSelection(editable, spanEnd); 3490 updateSpellCheckSpans(spanStart, spanEnd, false); 3491 hideWithCleanUp(); 3492 } 3493 }); 3494 3495 mDeleteButton = (TextView) mContentView.findViewById( 3496 com.android.internal.R.id.deleteButton); 3497 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3498 public void onClick(View v) { 3499 final Editable editable = (Editable) mTextView.getText(); 3500 3501 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3502 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3503 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3504 // Do not leave two adjacent spaces after deletion, or one at beginning of 3505 // text 3506 if (spanUnionEnd < editable.length() 3507 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3508 && (spanUnionStart == 0 3509 || Character.isSpaceChar( 3510 editable.charAt(spanUnionStart - 1)))) { 3511 spanUnionEnd = spanUnionEnd + 1; 3512 } 3513 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3514 } 3515 hideWithCleanUp(); 3516 } 3517 }); 3518 3519 } 3520 3521 public boolean isShowingUp() { 3522 return mIsShowingUp; 3523 } 3524 3525 public void onParentLostFocus() { 3526 mIsShowingUp = false; 3527 } 3528 3529 private class SuggestionAdapter extends BaseAdapter { 3530 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3531 Context.LAYOUT_INFLATER_SERVICE); 3532 3533 @Override 3534 public int getCount() { 3535 return mNumberOfSuggestions; 3536 } 3537 3538 @Override 3539 public Object getItem(int position) { 3540 return mSuggestionInfos[position]; 3541 } 3542 3543 @Override 3544 public long getItemId(int position) { 3545 return position; 3546 } 3547 3548 @Override 3549 public View getView(int position, View convertView, ViewGroup parent) { 3550 TextView textView = (TextView) convertView; 3551 3552 if (textView == null) { 3553 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3554 parent, false); 3555 } 3556 3557 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3558 textView.setText(suggestionInfo.mText); 3559 return textView; 3560 } 3561 } 3562 3563 @VisibleForTesting 3564 public ViewGroup getContentViewForTesting() { 3565 return mContentView; 3566 } 3567 3568 @Override 3569 public void show() { 3570 if (!(mTextView.getText() instanceof Editable)) return; 3571 if (extractedTextModeWillBeStarted()) { 3572 return; 3573 } 3574 3575 if (updateSuggestions()) { 3576 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3577 mTextView.setCursorVisible(false); 3578 mIsShowingUp = true; 3579 super.show(); 3580 } 3581 } 3582 3583 @Override 3584 protected void measureContent() { 3585 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3586 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3587 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3588 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3589 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3590 3591 int width = 0; 3592 View view = null; 3593 for (int i = 0; i < mNumberOfSuggestions; i++) { 3594 view = mSuggestionsAdapter.getView(i, view, mContentView); 3595 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3596 view.measure(horizontalMeasure, verticalMeasure); 3597 width = Math.max(width, view.getMeasuredWidth()); 3598 } 3599 3600 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3601 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3602 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3603 } 3604 3605 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3606 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3607 3608 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3609 + mContainerMarginWidth; 3610 3611 // Enforce the width based on actual text widths 3612 mContentView.measure( 3613 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3614 verticalMeasure); 3615 3616 Drawable popupBackground = mPopupWindow.getBackground(); 3617 if (popupBackground != null) { 3618 if (mTempRect == null) mTempRect = new Rect(); 3619 popupBackground.getPadding(mTempRect); 3620 width += mTempRect.left + mTempRect.right; 3621 } 3622 mPopupWindow.setWidth(width); 3623 } 3624 3625 @Override 3626 protected int getTextOffset() { 3627 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3628 } 3629 3630 @Override 3631 protected int getVerticalLocalPosition(int line) { 3632 return mTextView.getLayout().getLineBottom(line) - mContainerMarginTop; 3633 } 3634 3635 @Override 3636 protected int clipVertically(int positionY) { 3637 final int height = mContentView.getMeasuredHeight(); 3638 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3639 return Math.min(positionY, displayMetrics.heightPixels - height); 3640 } 3641 3642 private void hideWithCleanUp() { 3643 for (final SuggestionInfo info : mSuggestionInfos) { 3644 info.clear(); 3645 } 3646 mMisspelledSpanInfo.clear(); 3647 hide(); 3648 } 3649 3650 private boolean updateSuggestions() { 3651 Spannable spannable = (Spannable) mTextView.getText(); 3652 mNumberOfSuggestions = 3653 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3654 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3655 return false; 3656 } 3657 3658 int spanUnionStart = mTextView.getText().length(); 3659 int spanUnionEnd = 0; 3660 3661 for (int i = 0; i < mNumberOfSuggestions; i++) { 3662 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3663 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3664 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3665 } 3666 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3667 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3668 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3669 } 3670 3671 for (int i = 0; i < mNumberOfSuggestions; i++) { 3672 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3673 } 3674 3675 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3676 int addToDictionaryButtonVisibility = View.GONE; 3677 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3678 if (mMisspelledSpanInfo.mSpanStart >= 0 3679 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3680 addToDictionaryButtonVisibility = View.VISIBLE; 3681 } 3682 } 3683 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3684 3685 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3686 final int underlineColor; 3687 if (mNumberOfSuggestions != 0) { 3688 underlineColor = 3689 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3690 } else { 3691 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3692 } 3693 3694 if (underlineColor == 0) { 3695 // Fallback on the default highlight color when the first span does not provide one 3696 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3697 } else { 3698 final float BACKGROUND_TRANSPARENCY = 0.4f; 3699 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3700 mSuggestionRangeSpan.setBackgroundColor( 3701 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3702 } 3703 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3704 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3705 3706 mSuggestionsAdapter.notifyDataSetChanged(); 3707 return true; 3708 } 3709 3710 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3711 int unionEnd) { 3712 final Spannable text = (Spannable) mTextView.getText(); 3713 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3714 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3715 3716 // Adjust the start/end of the suggestion span 3717 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3718 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3719 + suggestionInfo.mText.length(); 3720 3721 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3722 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3723 3724 // Add the text before and after the span. 3725 final String textAsString = text.toString(); 3726 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3727 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3728 } 3729 3730 @Override 3731 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3732 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3733 replaceWithSuggestion(suggestionInfo); 3734 hideWithCleanUp(); 3735 } 3736 } 3737 3738 /** 3739 * An ActionMode Callback class that is used to provide actions while in text insertion or 3740 * selection mode. 3741 * 3742 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3743 * actions, depending on which of these this TextView supports and the current selection. 3744 */ 3745 private class TextActionModeCallback extends ActionMode.Callback2 { 3746 private final Path mSelectionPath = new Path(); 3747 private final RectF mSelectionBounds = new RectF(); 3748 private final boolean mHasSelection; 3749 private final int mHandleHeight; 3750 3751 public TextActionModeCallback(boolean hasSelection) { 3752 mHasSelection = hasSelection; 3753 if (mHasSelection) { 3754 SelectionModifierCursorController selectionController = getSelectionController(); 3755 if (selectionController.mStartHandle == null) { 3756 // As these are for initializing selectionController, hide() must be called. 3757 selectionController.initDrawables(); 3758 selectionController.initHandles(); 3759 selectionController.hide(); 3760 } 3761 mHandleHeight = Math.max( 3762 mSelectHandleLeft.getMinimumHeight(), 3763 mSelectHandleRight.getMinimumHeight()); 3764 } else { 3765 InsertionPointCursorController insertionController = getInsertionController(); 3766 if (insertionController != null) { 3767 insertionController.getHandle(); 3768 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3769 } else { 3770 mHandleHeight = 0; 3771 } 3772 } 3773 } 3774 3775 @Override 3776 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3777 mode.setTitle(null); 3778 mode.setSubtitle(null); 3779 mode.setTitleOptionalHint(true); 3780 populateMenuWithItems(menu); 3781 3782 Callback customCallback = getCustomCallback(); 3783 if (customCallback != null) { 3784 if (!customCallback.onCreateActionMode(mode, menu)) { 3785 // The custom mode can choose to cancel the action mode, dismiss selection. 3786 Selection.setSelection((Spannable) mTextView.getText(), 3787 mTextView.getSelectionEnd()); 3788 return false; 3789 } 3790 } 3791 3792 if (mTextView.canProcessText()) { 3793 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3794 } 3795 3796 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3797 if (mHasSelection && !mTextView.hasTransientState()) { 3798 mTextView.setHasTransientState(true); 3799 } 3800 return true; 3801 } else { 3802 return false; 3803 } 3804 } 3805 3806 private Callback getCustomCallback() { 3807 return mHasSelection 3808 ? mCustomSelectionActionModeCallback 3809 : mCustomInsertionActionModeCallback; 3810 } 3811 3812 private void populateMenuWithItems(Menu menu) { 3813 if (mTextView.canCut()) { 3814 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3815 com.android.internal.R.string.cut) 3816 .setAlphabeticShortcut('x') 3817 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3818 } 3819 3820 if (mTextView.canCopy()) { 3821 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3822 com.android.internal.R.string.copy) 3823 .setAlphabeticShortcut('c') 3824 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3825 } 3826 3827 if (mTextView.canPaste()) { 3828 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3829 com.android.internal.R.string.paste) 3830 .setAlphabeticShortcut('v') 3831 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3832 } 3833 3834 if (mTextView.canShare()) { 3835 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3836 com.android.internal.R.string.share) 3837 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3838 } 3839 3840 if (mTextView.canRequestAutofill()) { 3841 final String selected = mTextView.getSelectedText(); 3842 if (selected == null || selected.isEmpty()) { 3843 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3844 com.android.internal.R.string.autofill) 3845 .setShowAsAction(MenuItem.SHOW_AS_OVERFLOW_ALWAYS); 3846 } 3847 } 3848 3849 if (mTextView.canPasteAsPlainText()) { 3850 menu.add( 3851 Menu.NONE, 3852 TextView.ID_PASTE_AS_PLAIN_TEXT, 3853 MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 3854 com.android.internal.R.string.paste_as_plain_text) 3855 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3856 } 3857 3858 updateSelectAllItem(menu); 3859 updateReplaceItem(menu); 3860 updateAssistMenuItem(menu); 3861 } 3862 3863 @Override 3864 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3865 updateSelectAllItem(menu); 3866 updateReplaceItem(menu); 3867 updateAssistMenuItem(menu); 3868 3869 Callback customCallback = getCustomCallback(); 3870 if (customCallback != null) { 3871 return customCallback.onPrepareActionMode(mode, menu); 3872 } 3873 return true; 3874 } 3875 3876 private void updateSelectAllItem(Menu menu) { 3877 boolean canSelectAll = mTextView.canSelectAllText(); 3878 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3879 if (canSelectAll && !selectAllItemExists) { 3880 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3881 com.android.internal.R.string.selectAll) 3882 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3883 } else if (!canSelectAll && selectAllItemExists) { 3884 menu.removeItem(TextView.ID_SELECT_ALL); 3885 } 3886 } 3887 3888 private void updateReplaceItem(Menu menu) { 3889 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3890 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3891 if (canReplace && !replaceItemExists) { 3892 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3893 com.android.internal.R.string.replace) 3894 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3895 } else if (!canReplace && replaceItemExists) { 3896 menu.removeItem(TextView.ID_REPLACE); 3897 } 3898 } 3899 3900 private void updateAssistMenuItem(Menu menu) { 3901 menu.removeItem(TextView.ID_ASSIST); 3902 final TextClassification textClassification = 3903 getSelectionActionModeHelper().getTextClassification(); 3904 if (canAssist()) { 3905 menu.add(TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, 3906 textClassification.getLabel()) 3907 .setIcon(textClassification.getIcon()) 3908 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3909 mMetricsLogger.write( 3910 new LogMaker(MetricsEvent.TEXT_SELECTION_MENU_ITEM_ASSIST) 3911 .setType(MetricsEvent.TYPE_OPEN) 3912 .setSubtype(textClassification.getLogType())); 3913 } 3914 } 3915 3916 private boolean canAssist() { 3917 final TextClassification textClassification = 3918 getSelectionActionModeHelper().getTextClassification(); 3919 return mTextView.isDeviceProvisioned() 3920 && textClassification != null 3921 && (textClassification.getIcon() != null 3922 || !TextUtils.isEmpty(textClassification.getLabel())) 3923 && (textClassification.getOnClickListener() != null 3924 || (textClassification.getIntent() != null 3925 && mTextView.getContext().canStartActivityForResult())); 3926 } 3927 3928 @Override 3929 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3930 getSelectionActionModeHelper().onSelectionAction(); 3931 3932 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3933 return true; 3934 } 3935 Callback customCallback = getCustomCallback(); 3936 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3937 return true; 3938 } 3939 final TextClassification textClassification = 3940 getSelectionActionModeHelper().getTextClassification(); 3941 if (TextView.ID_ASSIST == item.getItemId() && textClassification != null) { 3942 final OnClickListener onClickListener = 3943 textClassification.getOnClickListener(); 3944 if (onClickListener != null) { 3945 onClickListener.onClick(mTextView); 3946 } else { 3947 final Intent intent = textClassification.getIntent(); 3948 if (intent != null) { 3949 TextClassification.createStartActivityOnClickListener( 3950 mTextView.getContext(), intent) 3951 .onClick(mTextView); 3952 } 3953 } 3954 mMetricsLogger.action( 3955 MetricsEvent.ACTION_TEXT_SELECTION_MENU_ITEM_ASSIST, 3956 textClassification.getLogType()); 3957 stopTextActionMode(); 3958 return true; 3959 } 3960 return mTextView.onTextContextMenuItem(item.getItemId()); 3961 } 3962 3963 @Override 3964 public void onDestroyActionMode(ActionMode mode) { 3965 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3966 getSelectionActionModeHelper().onDestroyActionMode(); 3967 mTextActionMode = null; 3968 Callback customCallback = getCustomCallback(); 3969 if (customCallback != null) { 3970 customCallback.onDestroyActionMode(mode); 3971 } 3972 3973 if (!mPreserveSelection) { 3974 /* 3975 * Leave current selection when we tentatively destroy action mode for the 3976 * selection. If we're detaching from a window, we'll bring back the selection 3977 * mode when (if) we get reattached. 3978 */ 3979 Selection.setSelection((Spannable) mTextView.getText(), 3980 mTextView.getSelectionEnd()); 3981 } 3982 3983 if (mSelectionModifierCursorController != null) { 3984 mSelectionModifierCursorController.hide(); 3985 } 3986 } 3987 3988 @Override 3989 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3990 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3991 super.onGetContentRect(mode, view, outRect); 3992 return; 3993 } 3994 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3995 // We have a selection. 3996 mSelectionPath.reset(); 3997 mTextView.getLayout().getSelectionPath( 3998 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3999 mSelectionPath.computeBounds(mSelectionBounds, true); 4000 mSelectionBounds.bottom += mHandleHeight; 4001 } else { 4002 // We have a cursor. 4003 Layout layout = mTextView.getLayout(); 4004 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 4005 float primaryHorizontal = clampHorizontalPosition(null, 4006 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 4007 mSelectionBounds.set( 4008 primaryHorizontal, 4009 layout.getLineTop(line), 4010 primaryHorizontal, 4011 layout.getLineTop(line + 1) + mHandleHeight); 4012 } 4013 // Take TextView's padding and scroll into account. 4014 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4015 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4016 outRect.set( 4017 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4018 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4019 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4020 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4021 } 4022 } 4023 4024 /** 4025 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4026 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4027 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4028 */ 4029 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4030 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4031 final int[] mTmpIntOffset = new int[2]; 4032 final Matrix mViewToScreenMatrix = new Matrix(); 4033 4034 @Override 4035 public void updatePosition(int parentPositionX, int parentPositionY, 4036 boolean parentPositionChanged, boolean parentScrolled) { 4037 final InputMethodState ims = mInputMethodState; 4038 if (ims == null || ims.mBatchEditNesting > 0) { 4039 return; 4040 } 4041 final InputMethodManager imm = InputMethodManager.peekInstance(); 4042 if (null == imm) { 4043 return; 4044 } 4045 if (!imm.isActive(mTextView)) { 4046 return; 4047 } 4048 // Skip if the IME has not requested the cursor/anchor position. 4049 if (!imm.isCursorAnchorInfoEnabled()) { 4050 return; 4051 } 4052 Layout layout = mTextView.getLayout(); 4053 if (layout == null) { 4054 return; 4055 } 4056 4057 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4058 builder.reset(); 4059 4060 final int selectionStart = mTextView.getSelectionStart(); 4061 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4062 4063 // Construct transformation matrix from view local coordinates to screen coordinates. 4064 mViewToScreenMatrix.set(mTextView.getMatrix()); 4065 mTextView.getLocationOnScreen(mTmpIntOffset); 4066 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4067 builder.setMatrix(mViewToScreenMatrix); 4068 4069 final float viewportToContentHorizontalOffset = 4070 mTextView.viewportToContentHorizontalOffset(); 4071 final float viewportToContentVerticalOffset = 4072 mTextView.viewportToContentVerticalOffset(); 4073 4074 final CharSequence text = mTextView.getText(); 4075 if (text instanceof Spannable) { 4076 final Spannable sp = (Spannable) text; 4077 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4078 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4079 if (composingTextEnd < composingTextStart) { 4080 final int temp = composingTextEnd; 4081 composingTextEnd = composingTextStart; 4082 composingTextStart = temp; 4083 } 4084 final boolean hasComposingText = 4085 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4086 if (hasComposingText) { 4087 final CharSequence composingText = text.subSequence(composingTextStart, 4088 composingTextEnd); 4089 builder.setComposingText(composingTextStart, composingText); 4090 mTextView.populateCharacterBounds(builder, composingTextStart, 4091 composingTextEnd, viewportToContentHorizontalOffset, 4092 viewportToContentVerticalOffset); 4093 } 4094 } 4095 4096 // Treat selectionStart as the insertion point. 4097 if (0 <= selectionStart) { 4098 final int offset = selectionStart; 4099 final int line = layout.getLineForOffset(offset); 4100 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4101 + viewportToContentHorizontalOffset; 4102 final float insertionMarkerTop = layout.getLineTop(line) 4103 + viewportToContentVerticalOffset; 4104 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4105 + viewportToContentVerticalOffset; 4106 final float insertionMarkerBottom = layout.getLineBottom(line) 4107 + viewportToContentVerticalOffset; 4108 final boolean isTopVisible = mTextView 4109 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4110 final boolean isBottomVisible = mTextView 4111 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4112 int insertionMarkerFlags = 0; 4113 if (isTopVisible || isBottomVisible) { 4114 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4115 } 4116 if (!isTopVisible || !isBottomVisible) { 4117 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4118 } 4119 if (layout.isRtlCharAt(offset)) { 4120 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4121 } 4122 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4123 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4124 } 4125 4126 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4127 } 4128 } 4129 4130 @VisibleForTesting 4131 public abstract class HandleView extends View implements TextViewPositionListener { 4132 protected Drawable mDrawable; 4133 protected Drawable mDrawableLtr; 4134 protected Drawable mDrawableRtl; 4135 private final PopupWindow mContainer; 4136 // Position with respect to the parent TextView 4137 private int mPositionX, mPositionY; 4138 private boolean mIsDragging; 4139 // Offset from touch position to mPosition 4140 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4141 protected int mHotspotX; 4142 protected int mHorizontalGravity; 4143 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4144 private float mTouchOffsetY; 4145 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4146 private float mIdealVerticalOffset; 4147 // Parent's (TextView) previous position in window 4148 private int mLastParentX, mLastParentY; 4149 // Parent's (TextView) previous position on screen 4150 private int mLastParentXOnScreen, mLastParentYOnScreen; 4151 // Previous text character offset 4152 protected int mPreviousOffset = -1; 4153 // Previous text character offset 4154 private boolean mPositionHasChanged = true; 4155 // Minimum touch target size for handles 4156 private int mMinSize; 4157 // Indicates the line of text that the handle is on. 4158 protected int mPrevLine = UNSET_LINE; 4159 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4160 // when selecting text when the handles jump to the end / start of words which may be on 4161 // a different line. 4162 protected int mPreviousLineTouched = UNSET_LINE; 4163 4164 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4165 super(mTextView.getContext()); 4166 setId(id); 4167 mContainer = new PopupWindow(mTextView.getContext(), null, 4168 com.android.internal.R.attr.textSelectHandleWindowStyle); 4169 mContainer.setSplitTouchEnabled(true); 4170 mContainer.setClippingEnabled(false); 4171 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4172 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4173 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4174 mContainer.setContentView(this); 4175 4176 mDrawableLtr = drawableLtr; 4177 mDrawableRtl = drawableRtl; 4178 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4179 com.android.internal.R.dimen.text_handle_min_size); 4180 4181 updateDrawable(); 4182 4183 final int handleHeight = getPreferredHeight(); 4184 mTouchOffsetY = -0.3f * handleHeight; 4185 mIdealVerticalOffset = 0.7f * handleHeight; 4186 } 4187 4188 public float getIdealVerticalOffset() { 4189 return mIdealVerticalOffset; 4190 } 4191 4192 protected void updateDrawable() { 4193 if (mIsDragging) { 4194 // Don't update drawable during dragging. 4195 return; 4196 } 4197 final Layout layout = mTextView.getLayout(); 4198 if (layout == null) { 4199 return; 4200 } 4201 final int offset = getCurrentCursorOffset(); 4202 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4203 final Drawable oldDrawable = mDrawable; 4204 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4205 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4206 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4207 if (oldDrawable != mDrawable && isShowing()) { 4208 // Update popup window position. 4209 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4210 - getHorizontalOffset() + getCursorOffset(); 4211 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4212 mPositionHasChanged = true; 4213 updatePosition(mLastParentX, mLastParentY, false, false); 4214 postInvalidate(); 4215 } 4216 } 4217 4218 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4219 protected abstract int getHorizontalGravity(boolean isRtlRun); 4220 4221 // Touch-up filter: number of previous positions remembered 4222 private static final int HISTORY_SIZE = 5; 4223 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4224 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4225 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4226 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4227 private int mPreviousOffsetIndex = 0; 4228 private int mNumberPreviousOffsets = 0; 4229 4230 private void startTouchUpFilter(int offset) { 4231 mNumberPreviousOffsets = 0; 4232 addPositionToTouchUpFilter(offset); 4233 } 4234 4235 private void addPositionToTouchUpFilter(int offset) { 4236 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4237 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4238 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4239 mNumberPreviousOffsets++; 4240 } 4241 4242 private void filterOnTouchUp(boolean fromTouchScreen) { 4243 final long now = SystemClock.uptimeMillis(); 4244 int i = 0; 4245 int index = mPreviousOffsetIndex; 4246 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4247 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4248 i++; 4249 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4250 } 4251 4252 if (i > 0 && i < iMax 4253 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4254 positionAtCursorOffset(mPreviousOffsets[index], false, fromTouchScreen); 4255 } 4256 } 4257 4258 public boolean offsetHasBeenChanged() { 4259 return mNumberPreviousOffsets > 1; 4260 } 4261 4262 @Override 4263 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4264 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4265 } 4266 4267 @Override 4268 public void invalidate() { 4269 super.invalidate(); 4270 if (isShowing()) { 4271 positionAtCursorOffset(getCurrentCursorOffset(), true, false); 4272 } 4273 }; 4274 4275 private int getPreferredWidth() { 4276 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4277 } 4278 4279 private int getPreferredHeight() { 4280 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4281 } 4282 4283 public void show() { 4284 if (isShowing()) return; 4285 4286 getPositionListener().addSubscriber(this, true /* local position may change */); 4287 4288 // Make sure the offset is always considered new, even when focusing at same position 4289 mPreviousOffset = -1; 4290 positionAtCursorOffset(getCurrentCursorOffset(), false, false); 4291 } 4292 4293 protected void dismiss() { 4294 mIsDragging = false; 4295 mContainer.dismiss(); 4296 onDetached(); 4297 } 4298 4299 public void hide() { 4300 dismiss(); 4301 4302 getPositionListener().removeSubscriber(this); 4303 } 4304 4305 public boolean isShowing() { 4306 return mContainer.isShowing(); 4307 } 4308 4309 private boolean isVisible() { 4310 // Always show a dragging handle. 4311 if (mIsDragging) { 4312 return true; 4313 } 4314 4315 if (mTextView.isInBatchEditMode()) { 4316 return false; 4317 } 4318 4319 return mTextView.isPositionVisible( 4320 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4321 } 4322 4323 public abstract int getCurrentCursorOffset(); 4324 4325 protected abstract void updateSelection(int offset); 4326 4327 protected abstract void updatePosition(float x, float y, boolean fromTouchScreen); 4328 4329 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4330 return layout.isRtlCharAt(offset); 4331 } 4332 4333 @VisibleForTesting 4334 public float getHorizontal(@NonNull Layout layout, int offset) { 4335 return layout.getPrimaryHorizontal(offset); 4336 } 4337 4338 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4339 return mTextView.getOffsetAtCoordinate(line, x); 4340 } 4341 4342 /** 4343 * @param offset Cursor offset. Must be in [-1, length]. 4344 * @param forceUpdatePosition whether to force update the position. This should be true 4345 * when If the parent has been scrolled, for example. 4346 * @param fromTouchScreen {@code true} if the cursor is moved with motion events from the 4347 * touch screen. 4348 */ 4349 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4350 boolean fromTouchScreen) { 4351 // A HandleView relies on the layout, which may be nulled by external methods 4352 Layout layout = mTextView.getLayout(); 4353 if (layout == null) { 4354 // Will update controllers' state, hiding them and stopping selection mode if needed 4355 prepareCursorControllers(); 4356 return; 4357 } 4358 layout = mTextView.getLayout(); 4359 4360 boolean offsetChanged = offset != mPreviousOffset; 4361 if (offsetChanged || forceUpdatePosition) { 4362 if (offsetChanged) { 4363 updateSelection(offset); 4364 if (fromTouchScreen && mHapticTextHandleEnabled) { 4365 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 4366 } 4367 addPositionToTouchUpFilter(offset); 4368 } 4369 final int line = layout.getLineForOffset(offset); 4370 mPrevLine = line; 4371 4372 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4373 - getHorizontalOffset() + getCursorOffset(); 4374 mPositionY = layout.getLineBottom(line); 4375 4376 // Take TextView's padding and scroll into account. 4377 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4378 mPositionY += mTextView.viewportToContentVerticalOffset(); 4379 4380 mPreviousOffset = offset; 4381 mPositionHasChanged = true; 4382 } 4383 } 4384 4385 /** 4386 * Return the clamped horizontal position for the cursor. 4387 * 4388 * @param layout Text layout. 4389 * @param offset Character offset for the cursor. 4390 * @return The clamped horizontal position for the cursor. 4391 */ 4392 int getCursorHorizontalPosition(Layout layout, int offset) { 4393 return (int) (getHorizontal(layout, offset) - 0.5f); 4394 } 4395 4396 @Override 4397 public void updatePosition(int parentPositionX, int parentPositionY, 4398 boolean parentPositionChanged, boolean parentScrolled) { 4399 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled, false); 4400 if (parentPositionChanged || mPositionHasChanged) { 4401 if (mIsDragging) { 4402 // Update touchToWindow offset in case of parent scrolling while dragging 4403 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4404 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4405 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4406 mLastParentX = parentPositionX; 4407 mLastParentY = parentPositionY; 4408 } 4409 4410 onHandleMoved(); 4411 } 4412 4413 if (isVisible()) { 4414 // Transform to the window coordinates to follow the view tranformation. 4415 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4416 mTextView.transformFromViewToWindowSpace(pts); 4417 pts[0] -= mHotspotX + getHorizontalOffset(); 4418 4419 if (isShowing()) { 4420 mContainer.update(pts[0], pts[1], -1, -1); 4421 } else { 4422 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4423 } 4424 } else { 4425 if (isShowing()) { 4426 dismiss(); 4427 } 4428 } 4429 4430 mPositionHasChanged = false; 4431 } 4432 } 4433 4434 @Override 4435 protected void onDraw(Canvas c) { 4436 final int drawWidth = mDrawable.getIntrinsicWidth(); 4437 final int left = getHorizontalOffset(); 4438 4439 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4440 mDrawable.draw(c); 4441 } 4442 4443 private int getHorizontalOffset() { 4444 final int width = getPreferredWidth(); 4445 final int drawWidth = mDrawable.getIntrinsicWidth(); 4446 final int left; 4447 switch (mHorizontalGravity) { 4448 case Gravity.LEFT: 4449 left = 0; 4450 break; 4451 default: 4452 case Gravity.CENTER: 4453 left = (width - drawWidth) / 2; 4454 break; 4455 case Gravity.RIGHT: 4456 left = width - drawWidth; 4457 break; 4458 } 4459 return left; 4460 } 4461 4462 protected int getCursorOffset() { 4463 return 0; 4464 } 4465 4466 @Override 4467 public boolean onTouchEvent(MotionEvent ev) { 4468 updateFloatingToolbarVisibility(ev); 4469 4470 switch (ev.getActionMasked()) { 4471 case MotionEvent.ACTION_DOWN: { 4472 startTouchUpFilter(getCurrentCursorOffset()); 4473 4474 final PositionListener positionListener = getPositionListener(); 4475 mLastParentX = positionListener.getPositionX(); 4476 mLastParentY = positionListener.getPositionY(); 4477 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4478 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4479 4480 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4481 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4482 mTouchToWindowOffsetX = xInWindow - mPositionX; 4483 mTouchToWindowOffsetY = yInWindow - mPositionY; 4484 4485 mIsDragging = true; 4486 mPreviousLineTouched = UNSET_LINE; 4487 break; 4488 } 4489 4490 case MotionEvent.ACTION_MOVE: { 4491 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4492 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4493 4494 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4495 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4496 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4497 float newVerticalOffset; 4498 if (previousVerticalOffset < mIdealVerticalOffset) { 4499 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4500 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4501 } else { 4502 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4503 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4504 } 4505 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4506 4507 final float newPosX = 4508 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4509 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4510 4511 updatePosition(newPosX, newPosY, 4512 ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4513 break; 4514 } 4515 4516 case MotionEvent.ACTION_UP: 4517 filterOnTouchUp(ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4518 mIsDragging = false; 4519 updateDrawable(); 4520 break; 4521 4522 case MotionEvent.ACTION_CANCEL: 4523 mIsDragging = false; 4524 updateDrawable(); 4525 break; 4526 } 4527 return true; 4528 } 4529 4530 public boolean isDragging() { 4531 return mIsDragging; 4532 } 4533 4534 void onHandleMoved() {} 4535 4536 public void onDetached() {} 4537 } 4538 4539 private class InsertionHandleView extends HandleView { 4540 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4541 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4542 4543 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4544 private float mDownPositionX, mDownPositionY; 4545 private Runnable mHider; 4546 4547 public InsertionHandleView(Drawable drawable) { 4548 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4549 } 4550 4551 @Override 4552 public void show() { 4553 super.show(); 4554 4555 final long durationSinceCutOrCopy = 4556 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4557 4558 // Cancel the single tap delayed runnable. 4559 if (mInsertionActionModeRunnable != null 4560 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4561 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4562 || isCursorInsideEasyCorrectionSpan())) { 4563 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4564 } 4565 4566 // Prepare and schedule the single tap runnable to run exactly after the double tap 4567 // timeout has passed. 4568 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4569 && !isCursorInsideEasyCorrectionSpan() 4570 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4571 if (mTextActionMode == null) { 4572 if (mInsertionActionModeRunnable == null) { 4573 mInsertionActionModeRunnable = new Runnable() { 4574 @Override 4575 public void run() { 4576 startInsertionActionMode(); 4577 } 4578 }; 4579 } 4580 mTextView.postDelayed( 4581 mInsertionActionModeRunnable, 4582 ViewConfiguration.getDoubleTapTimeout() + 1); 4583 } 4584 4585 } 4586 4587 hideAfterDelay(); 4588 } 4589 4590 private void hideAfterDelay() { 4591 if (mHider == null) { 4592 mHider = new Runnable() { 4593 public void run() { 4594 hide(); 4595 } 4596 }; 4597 } else { 4598 removeHiderCallback(); 4599 } 4600 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4601 } 4602 4603 private void removeHiderCallback() { 4604 if (mHider != null) { 4605 mTextView.removeCallbacks(mHider); 4606 } 4607 } 4608 4609 @Override 4610 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4611 return drawable.getIntrinsicWidth() / 2; 4612 } 4613 4614 @Override 4615 protected int getHorizontalGravity(boolean isRtlRun) { 4616 return Gravity.CENTER_HORIZONTAL; 4617 } 4618 4619 @Override 4620 protected int getCursorOffset() { 4621 int offset = super.getCursorOffset(); 4622 if (mCursorDrawable != null) { 4623 mCursorDrawable.getPadding(mTempRect); 4624 offset += (mCursorDrawable.getIntrinsicWidth() 4625 - mTempRect.left - mTempRect.right) / 2; 4626 } 4627 return offset; 4628 } 4629 4630 @Override 4631 int getCursorHorizontalPosition(Layout layout, int offset) { 4632 if (mCursorDrawable != null) { 4633 final float horizontal = getHorizontal(layout, offset); 4634 return clampHorizontalPosition(mCursorDrawable, horizontal) + mTempRect.left; 4635 } 4636 return super.getCursorHorizontalPosition(layout, offset); 4637 } 4638 4639 @Override 4640 public boolean onTouchEvent(MotionEvent ev) { 4641 final boolean result = super.onTouchEvent(ev); 4642 4643 switch (ev.getActionMasked()) { 4644 case MotionEvent.ACTION_DOWN: 4645 mDownPositionX = ev.getRawX(); 4646 mDownPositionY = ev.getRawY(); 4647 break; 4648 4649 case MotionEvent.ACTION_UP: 4650 if (!offsetHasBeenChanged()) { 4651 final float deltaX = mDownPositionX - ev.getRawX(); 4652 final float deltaY = mDownPositionY - ev.getRawY(); 4653 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4654 4655 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4656 mTextView.getContext()); 4657 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4658 4659 if (distanceSquared < touchSlop * touchSlop) { 4660 // Tapping on the handle toggles the insertion action mode. 4661 if (mTextActionMode != null) { 4662 stopTextActionMode(); 4663 } else { 4664 startInsertionActionMode(); 4665 } 4666 } 4667 } else { 4668 if (mTextActionMode != null) { 4669 mTextActionMode.invalidateContentRect(); 4670 } 4671 } 4672 hideAfterDelay(); 4673 break; 4674 4675 case MotionEvent.ACTION_CANCEL: 4676 hideAfterDelay(); 4677 break; 4678 4679 default: 4680 break; 4681 } 4682 4683 return result; 4684 } 4685 4686 @Override 4687 public int getCurrentCursorOffset() { 4688 return mTextView.getSelectionStart(); 4689 } 4690 4691 @Override 4692 public void updateSelection(int offset) { 4693 Selection.setSelection((Spannable) mTextView.getText(), offset); 4694 } 4695 4696 @Override 4697 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4698 Layout layout = mTextView.getLayout(); 4699 int offset; 4700 if (layout != null) { 4701 if (mPreviousLineTouched == UNSET_LINE) { 4702 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4703 } 4704 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4705 offset = getOffsetAtCoordinate(layout, currLine, x); 4706 mPreviousLineTouched = currLine; 4707 } else { 4708 offset = -1; 4709 } 4710 positionAtCursorOffset(offset, false, fromTouchScreen); 4711 if (mTextActionMode != null) { 4712 invalidateActionMode(); 4713 } 4714 } 4715 4716 @Override 4717 void onHandleMoved() { 4718 super.onHandleMoved(); 4719 removeHiderCallback(); 4720 } 4721 4722 @Override 4723 public void onDetached() { 4724 super.onDetached(); 4725 removeHiderCallback(); 4726 } 4727 } 4728 4729 @Retention(RetentionPolicy.SOURCE) 4730 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4731 public @interface HandleType {} 4732 public static final int HANDLE_TYPE_SELECTION_START = 0; 4733 public static final int HANDLE_TYPE_SELECTION_END = 1; 4734 4735 private class SelectionHandleView extends HandleView { 4736 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4737 // end (HANDLE_TYPE_SELECTION_END). 4738 @HandleType 4739 private final int mHandleType; 4740 // Indicates whether the cursor is making adjustments within a word. 4741 private boolean mInWord = false; 4742 // Difference between touch position and word boundary position. 4743 private float mTouchWordDelta; 4744 // X value of the previous updatePosition call. 4745 private float mPrevX; 4746 // Indicates if the handle has moved a boundary between LTR and RTL text. 4747 private boolean mLanguageDirectionChanged = false; 4748 // Distance from edge of horizontally scrolling text view 4749 // to use to switch to character mode. 4750 private final float mTextViewEdgeSlop; 4751 // Used to save text view location. 4752 private final int[] mTextViewLocation = new int[2]; 4753 4754 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4755 @HandleType int handleType) { 4756 super(drawableLtr, drawableRtl, id); 4757 mHandleType = handleType; 4758 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4759 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4760 } 4761 4762 private boolean isStartHandle() { 4763 return mHandleType == HANDLE_TYPE_SELECTION_START; 4764 } 4765 4766 @Override 4767 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4768 if (isRtlRun == isStartHandle()) { 4769 return drawable.getIntrinsicWidth() / 4; 4770 } else { 4771 return (drawable.getIntrinsicWidth() * 3) / 4; 4772 } 4773 } 4774 4775 @Override 4776 protected int getHorizontalGravity(boolean isRtlRun) { 4777 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4778 } 4779 4780 @Override 4781 public int getCurrentCursorOffset() { 4782 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4783 } 4784 4785 @Override 4786 protected void updateSelection(int offset) { 4787 if (isStartHandle()) { 4788 Selection.setSelection((Spannable) mTextView.getText(), offset, 4789 mTextView.getSelectionEnd()); 4790 } else { 4791 Selection.setSelection((Spannable) mTextView.getText(), 4792 mTextView.getSelectionStart(), offset); 4793 } 4794 updateDrawable(); 4795 if (mTextActionMode != null) { 4796 invalidateActionMode(); 4797 } 4798 } 4799 4800 @Override 4801 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4802 final Layout layout = mTextView.getLayout(); 4803 if (layout == null) { 4804 // HandleView will deal appropriately in positionAtCursorOffset when 4805 // layout is null. 4806 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y), 4807 fromTouchScreen); 4808 return; 4809 } 4810 4811 if (mPreviousLineTouched == UNSET_LINE) { 4812 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4813 } 4814 4815 boolean positionCursor = false; 4816 final int anotherHandleOffset = 4817 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4818 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4819 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4820 4821 if (isStartHandle() && initialOffset >= anotherHandleOffset 4822 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4823 // Handles have crossed, bound it to the first selected line and 4824 // adjust by word / char as normal. 4825 currLine = layout.getLineForOffset(anotherHandleOffset); 4826 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4827 } 4828 4829 int offset = initialOffset; 4830 final int wordEnd = getWordEnd(offset); 4831 final int wordStart = getWordStart(offset); 4832 4833 if (mPrevX == UNSET_X_VALUE) { 4834 mPrevX = x; 4835 } 4836 4837 final int currentOffset = getCurrentCursorOffset(); 4838 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4839 final boolean atRtl = isAtRtlRun(layout, offset); 4840 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4841 4842 // We can't determine if the user is expanding or shrinking the selection if they're 4843 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4844 // the cursor at the current position. 4845 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4846 // We're on a boundary or this is the first direction change -- just update 4847 // to the current position. 4848 mLanguageDirectionChanged = true; 4849 mTouchWordDelta = 0.0f; 4850 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4851 return; 4852 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4853 // We've just moved past the boundary so update the position. After this we can 4854 // figure out if the user is expanding or shrinking to go by word or character. 4855 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4856 mTouchWordDelta = 0.0f; 4857 mLanguageDirectionChanged = false; 4858 return; 4859 } 4860 4861 boolean isExpanding; 4862 final float xDiff = x - mPrevX; 4863 if (isStartHandle()) { 4864 isExpanding = currLine < mPreviousLineTouched; 4865 } else { 4866 isExpanding = currLine > mPreviousLineTouched; 4867 } 4868 if (atRtl == isStartHandle()) { 4869 isExpanding |= xDiff > 0; 4870 } else { 4871 isExpanding |= xDiff < 0; 4872 } 4873 4874 if (mTextView.getHorizontallyScrolling()) { 4875 if (positionNearEdgeOfScrollingView(x, atRtl) 4876 && ((isStartHandle() && mTextView.getScrollX() != 0) 4877 || (!isStartHandle() 4878 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4879 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4880 || (!isStartHandle() && offset > currentOffset))) 4881 || !isExpanding)) { 4882 // If we're expanding ensure that the offset is actually expanding compared to 4883 // the current offset, if the handle snapped to the word, the finger position 4884 // may be out of sync and we don't want the selection to jump back. 4885 mTouchWordDelta = 0.0f; 4886 final int nextOffset = (atRtl == isStartHandle()) 4887 ? layout.getOffsetToRightOf(mPreviousOffset) 4888 : layout.getOffsetToLeftOf(mPreviousOffset); 4889 positionAndAdjustForCrossingHandles(nextOffset, fromTouchScreen); 4890 return; 4891 } 4892 } 4893 4894 if (isExpanding) { 4895 // User is increasing the selection. 4896 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4897 final boolean snapToWord = (!mInWord 4898 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4899 && atRtl == isAtRtlRun(layout, wordBoundary); 4900 if (snapToWord) { 4901 // Sometimes words can be broken across lines (Chinese, hyphenation). 4902 // We still snap to the word boundary but we only use the letters on the 4903 // current line to determine if the user is far enough into the word to snap. 4904 if (layout.getLineForOffset(wordBoundary) != currLine) { 4905 wordBoundary = isStartHandle() 4906 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4907 } 4908 final int offsetThresholdToSnap = isStartHandle() 4909 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4910 : wordStart + ((wordBoundary - wordStart) / 2); 4911 if (isStartHandle() 4912 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4913 // User is far enough into the word or on a different line so we expand by 4914 // word. 4915 offset = wordStart; 4916 } else if (!isStartHandle() 4917 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4918 // User is far enough into the word or on a different line so we expand by 4919 // word. 4920 offset = wordEnd; 4921 } else { 4922 offset = mPreviousOffset; 4923 } 4924 } 4925 if ((isStartHandle() && offset < initialOffset) 4926 || (!isStartHandle() && offset > initialOffset)) { 4927 final float adjustedX = getHorizontal(layout, offset); 4928 mTouchWordDelta = 4929 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4930 } else { 4931 mTouchWordDelta = 0.0f; 4932 } 4933 positionCursor = true; 4934 } else { 4935 final int adjustedOffset = 4936 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4937 final boolean shrinking = isStartHandle() 4938 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4939 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4940 if (shrinking) { 4941 // User is shrinking the selection. 4942 if (currLine != mPrevLine) { 4943 // We're on a different line, so we'll snap to word boundaries. 4944 offset = isStartHandle() ? wordStart : wordEnd; 4945 if ((isStartHandle() && offset < initialOffset) 4946 || (!isStartHandle() && offset > initialOffset)) { 4947 final float adjustedX = getHorizontal(layout, offset); 4948 mTouchWordDelta = 4949 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4950 } else { 4951 mTouchWordDelta = 0.0f; 4952 } 4953 } else { 4954 offset = adjustedOffset; 4955 } 4956 positionCursor = true; 4957 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4958 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4959 // Handle has jumped to the word boundary, and the user is moving 4960 // their finger towards the handle, the delta should be updated. 4961 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4962 - getHorizontal(layout, mPreviousOffset); 4963 } 4964 } 4965 4966 if (positionCursor) { 4967 mPreviousLineTouched = currLine; 4968 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4969 } 4970 mPrevX = x; 4971 } 4972 4973 @Override 4974 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4975 boolean fromTouchScreen) { 4976 super.positionAtCursorOffset(offset, forceUpdatePosition, fromTouchScreen); 4977 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 4978 } 4979 4980 @Override 4981 public boolean onTouchEvent(MotionEvent event) { 4982 boolean superResult = super.onTouchEvent(event); 4983 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 4984 // Reset the touch word offset and x value when the user 4985 // re-engages the handle. 4986 mTouchWordDelta = 0.0f; 4987 mPrevX = UNSET_X_VALUE; 4988 } 4989 return superResult; 4990 } 4991 4992 private void positionAndAdjustForCrossingHandles(int offset, boolean fromTouchScreen) { 4993 final int anotherHandleOffset = 4994 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4995 if ((isStartHandle() && offset >= anotherHandleOffset) 4996 || (!isStartHandle() && offset <= anotherHandleOffset)) { 4997 mTouchWordDelta = 0.0f; 4998 final Layout layout = mTextView.getLayout(); 4999 if (layout != null && offset != anotherHandleOffset) { 5000 final float horiz = getHorizontal(layout, offset); 5001 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 5002 !isStartHandle()); 5003 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 5004 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 5005 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 5006 // This handle passes another one as it crossed a direction boundary. 5007 // Don't minimize the selection, but keep the handle at the run boundary. 5008 final int currentOffset = getCurrentCursorOffset(); 5009 final int offsetToGetRunRange = isStartHandle() 5010 ? currentOffset : Math.max(currentOffset - 1, 0); 5011 final long range = layout.getRunRange(offsetToGetRunRange); 5012 if (isStartHandle()) { 5013 offset = TextUtils.unpackRangeStartFromLong(range); 5014 } else { 5015 offset = TextUtils.unpackRangeEndFromLong(range); 5016 } 5017 positionAtCursorOffset(offset, false, fromTouchScreen); 5018 return; 5019 } 5020 } 5021 // Handles can not cross and selection is at least one character. 5022 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5023 } 5024 positionAtCursorOffset(offset, false, fromTouchScreen); 5025 } 5026 5027 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5028 mTextView.getLocationOnScreen(mTextViewLocation); 5029 boolean nearEdge; 5030 if (atRtl == isStartHandle()) { 5031 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5032 - mTextView.getPaddingRight(); 5033 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5034 } else { 5035 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5036 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5037 } 5038 return nearEdge; 5039 } 5040 5041 @Override 5042 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5043 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5044 return layout.isRtlCharAt(offsetToCheck); 5045 } 5046 5047 @Override 5048 public float getHorizontal(@NonNull Layout layout, int offset) { 5049 return getHorizontal(layout, offset, isStartHandle()); 5050 } 5051 5052 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5053 final int line = layout.getLineForOffset(offset); 5054 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5055 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5056 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5057 return (isRtlChar == isRtlParagraph) 5058 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5059 } 5060 5061 @Override 5062 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5063 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5064 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5065 if (!layout.isLevelBoundary(primaryOffset)) { 5066 return primaryOffset; 5067 } 5068 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5069 final int currentOffset = getCurrentCursorOffset(); 5070 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5071 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5072 if (primaryDiff < secondaryDiff) { 5073 return primaryOffset; 5074 } else if (primaryDiff > secondaryDiff) { 5075 return secondaryOffset; 5076 } else { 5077 final int offsetToCheck = isStartHandle() 5078 ? currentOffset : Math.max(currentOffset - 1, 0); 5079 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5080 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5081 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5082 } 5083 } 5084 } 5085 5086 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5087 final int trueLine = mTextView.getLineAtCoordinate(y); 5088 if (layout == null || prevLine > layout.getLineCount() 5089 || layout.getLineCount() <= 0 || prevLine < 0) { 5090 // Invalid parameters, just return whatever line is at y. 5091 return trueLine; 5092 } 5093 5094 if (Math.abs(trueLine - prevLine) >= 2) { 5095 // Only stick to lines if we're within a line of the previous selection. 5096 return trueLine; 5097 } 5098 5099 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5100 final int lineCount = layout.getLineCount(); 5101 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5102 5103 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5104 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5105 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5106 5107 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5108 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5109 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5110 5111 // Determine if we've moved lines based on y position and previous line. 5112 int currLine; 5113 if (y <= yTopBound) { 5114 currLine = Math.max(prevLine - 1, 0); 5115 } else if (y >= yBottomBound) { 5116 currLine = Math.min(prevLine + 1, lineCount - 1); 5117 } else { 5118 currLine = prevLine; 5119 } 5120 return currLine; 5121 } 5122 5123 /** 5124 * A CursorController instance can be used to control a cursor in the text. 5125 */ 5126 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5127 /** 5128 * Makes the cursor controller visible on screen. 5129 * See also {@link #hide()}. 5130 */ 5131 public void show(); 5132 5133 /** 5134 * Hide the cursor controller from screen. 5135 * See also {@link #show()}. 5136 */ 5137 public void hide(); 5138 5139 /** 5140 * Called when the view is detached from window. Perform house keeping task, such as 5141 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5142 * preventing the activity from being recycled. 5143 */ 5144 public void onDetached(); 5145 5146 public boolean isCursorBeingModified(); 5147 5148 public boolean isActive(); 5149 } 5150 5151 private class InsertionPointCursorController implements CursorController { 5152 private InsertionHandleView mHandle; 5153 5154 public void show() { 5155 getHandle().show(); 5156 5157 if (mSelectionModifierCursorController != null) { 5158 mSelectionModifierCursorController.hide(); 5159 } 5160 } 5161 5162 public void hide() { 5163 if (mHandle != null) { 5164 mHandle.hide(); 5165 } 5166 } 5167 5168 public void onTouchModeChanged(boolean isInTouchMode) { 5169 if (!isInTouchMode) { 5170 hide(); 5171 } 5172 } 5173 5174 private InsertionHandleView getHandle() { 5175 if (mSelectHandleCenter == null) { 5176 mSelectHandleCenter = mTextView.getContext().getDrawable( 5177 mTextView.mTextSelectHandleRes); 5178 } 5179 if (mHandle == null) { 5180 mHandle = new InsertionHandleView(mSelectHandleCenter); 5181 } 5182 return mHandle; 5183 } 5184 5185 @Override 5186 public void onDetached() { 5187 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5188 observer.removeOnTouchModeChangeListener(this); 5189 5190 if (mHandle != null) mHandle.onDetached(); 5191 } 5192 5193 @Override 5194 public boolean isCursorBeingModified() { 5195 return mHandle != null && mHandle.isDragging(); 5196 } 5197 5198 @Override 5199 public boolean isActive() { 5200 return mHandle != null && mHandle.isShowing(); 5201 } 5202 5203 public void invalidateHandle() { 5204 if (mHandle != null) { 5205 mHandle.invalidate(); 5206 } 5207 } 5208 } 5209 5210 class SelectionModifierCursorController implements CursorController { 5211 // The cursor controller handles, lazily created when shown. 5212 private SelectionHandleView mStartHandle; 5213 private SelectionHandleView mEndHandle; 5214 // The offsets of that last touch down event. Remembered to start selection there. 5215 private int mMinTouchOffset, mMaxTouchOffset; 5216 5217 private float mDownPositionX, mDownPositionY; 5218 private boolean mGestureStayedInTapRegion; 5219 5220 // Where the user first starts the drag motion. 5221 private int mStartOffset = -1; 5222 5223 private boolean mHaventMovedEnoughToStartDrag; 5224 // The line that a selection happened most recently with the drag accelerator. 5225 private int mLineSelectionIsOn = -1; 5226 // Whether the drag accelerator has selected past the initial line. 5227 private boolean mSwitchedLines = false; 5228 5229 // Indicates the drag accelerator mode that the user is currently using. 5230 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5231 // Drag accelerator is inactive. 5232 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5233 // Character based selection by dragging. Only for mouse. 5234 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5235 // Word based selection by dragging. Enabled after long pressing or double tapping. 5236 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5237 // Paragraph based selection by dragging. Enabled after mouse triple click. 5238 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5239 5240 SelectionModifierCursorController() { 5241 resetTouchOffsets(); 5242 } 5243 5244 public void show() { 5245 if (mTextView.isInBatchEditMode()) { 5246 return; 5247 } 5248 initDrawables(); 5249 initHandles(); 5250 } 5251 5252 private void initDrawables() { 5253 if (mSelectHandleLeft == null) { 5254 mSelectHandleLeft = mTextView.getContext().getDrawable( 5255 mTextView.mTextSelectHandleLeftRes); 5256 } 5257 if (mSelectHandleRight == null) { 5258 mSelectHandleRight = mTextView.getContext().getDrawable( 5259 mTextView.mTextSelectHandleRightRes); 5260 } 5261 } 5262 5263 private void initHandles() { 5264 // Lazy object creation has to be done before updatePosition() is called. 5265 if (mStartHandle == null) { 5266 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5267 com.android.internal.R.id.selection_start_handle, 5268 HANDLE_TYPE_SELECTION_START); 5269 } 5270 if (mEndHandle == null) { 5271 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5272 com.android.internal.R.id.selection_end_handle, 5273 HANDLE_TYPE_SELECTION_END); 5274 } 5275 5276 mStartHandle.show(); 5277 mEndHandle.show(); 5278 5279 hideInsertionPointCursorController(); 5280 } 5281 5282 public void hide() { 5283 if (mStartHandle != null) mStartHandle.hide(); 5284 if (mEndHandle != null) mEndHandle.hide(); 5285 } 5286 5287 public void enterDrag(int dragAcceleratorMode) { 5288 // Just need to init the handles / hide insertion cursor. 5289 show(); 5290 mDragAcceleratorMode = dragAcceleratorMode; 5291 // Start location of selection. 5292 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5293 mLastDownPositionY); 5294 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5295 // Don't show the handles until user has lifted finger. 5296 hide(); 5297 5298 // This stops scrolling parents from intercepting the touch event, allowing 5299 // the user to continue dragging across the screen to select text; TextView will 5300 // scroll as necessary. 5301 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5302 mTextView.cancelLongPress(); 5303 } 5304 5305 public void onTouchEvent(MotionEvent event) { 5306 // This is done even when the View does not have focus, so that long presses can start 5307 // selection and tap can move cursor from this tap position. 5308 final float eventX = event.getX(); 5309 final float eventY = event.getY(); 5310 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5311 switch (event.getActionMasked()) { 5312 case MotionEvent.ACTION_DOWN: 5313 if (extractedTextModeWillBeStarted()) { 5314 // Prevent duplicating the selection handles until the mode starts. 5315 hide(); 5316 } else { 5317 // Remember finger down position, to be able to start selection from there. 5318 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5319 eventX, eventY); 5320 5321 // Double tap detection 5322 if (mGestureStayedInTapRegion) { 5323 if (mTapState == TAP_STATE_DOUBLE_TAP 5324 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5325 final float deltaX = eventX - mDownPositionX; 5326 final float deltaY = eventY - mDownPositionY; 5327 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5328 5329 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5330 mTextView.getContext()); 5331 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5332 boolean stayedInArea = 5333 distanceSquared < doubleTapSlop * doubleTapSlop; 5334 5335 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5336 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5337 selectCurrentWordAndStartDrag(); 5338 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5339 selectCurrentParagraphAndStartDrag(); 5340 } 5341 mDiscardNextActionUp = true; 5342 } 5343 } 5344 } 5345 5346 mDownPositionX = eventX; 5347 mDownPositionY = eventY; 5348 mGestureStayedInTapRegion = true; 5349 mHaventMovedEnoughToStartDrag = true; 5350 } 5351 break; 5352 5353 case MotionEvent.ACTION_POINTER_DOWN: 5354 case MotionEvent.ACTION_POINTER_UP: 5355 // Handle multi-point gestures. Keep min and max offset positions. 5356 // Only activated for devices that correctly handle multi-touch. 5357 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5358 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5359 updateMinAndMaxOffsets(event); 5360 } 5361 break; 5362 5363 case MotionEvent.ACTION_MOVE: 5364 final ViewConfiguration viewConfig = ViewConfiguration.get( 5365 mTextView.getContext()); 5366 final int touchSlop = viewConfig.getScaledTouchSlop(); 5367 5368 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5369 final float deltaX = eventX - mDownPositionX; 5370 final float deltaY = eventY - mDownPositionY; 5371 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5372 5373 if (mGestureStayedInTapRegion) { 5374 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5375 mGestureStayedInTapRegion = 5376 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5377 } 5378 if (mHaventMovedEnoughToStartDrag) { 5379 // We don't start dragging until the user has moved enough. 5380 mHaventMovedEnoughToStartDrag = 5381 distanceSquared <= touchSlop * touchSlop; 5382 } 5383 } 5384 5385 if (isMouse && !isDragAcceleratorActive()) { 5386 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5387 if (mTextView.hasSelection() 5388 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5389 && offset >= mTextView.getSelectionStart() 5390 && offset <= mTextView.getSelectionEnd()) { 5391 startDragAndDrop(); 5392 break; 5393 } 5394 5395 if (mStartOffset != offset) { 5396 // Start character based drag accelerator. 5397 stopTextActionMode(); 5398 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5399 mDiscardNextActionUp = true; 5400 mHaventMovedEnoughToStartDrag = false; 5401 } 5402 } 5403 5404 if (mStartHandle != null && mStartHandle.isShowing()) { 5405 // Don't do the drag if the handles are showing already. 5406 break; 5407 } 5408 5409 updateSelection(event); 5410 break; 5411 5412 case MotionEvent.ACTION_UP: 5413 if (!isDragAcceleratorActive()) { 5414 break; 5415 } 5416 updateSelection(event); 5417 5418 // No longer dragging to select text, let the parent intercept events. 5419 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5420 5421 // No longer the first dragging motion, reset. 5422 resetDragAcceleratorState(); 5423 5424 if (mTextView.hasSelection()) { 5425 // Drag selection should not be adjusted by the text classifier. 5426 startSelectionActionModeAsync(mHaventMovedEnoughToStartDrag); 5427 } 5428 break; 5429 } 5430 } 5431 5432 private void updateSelection(MotionEvent event) { 5433 if (mTextView.getLayout() != null) { 5434 switch (mDragAcceleratorMode) { 5435 case DRAG_ACCELERATOR_MODE_CHARACTER: 5436 updateCharacterBasedSelection(event); 5437 break; 5438 case DRAG_ACCELERATOR_MODE_WORD: 5439 updateWordBasedSelection(event); 5440 break; 5441 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5442 updateParagraphBasedSelection(event); 5443 break; 5444 } 5445 } 5446 } 5447 5448 /** 5449 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5450 * 5451 * @return true if the drag was started. 5452 */ 5453 private boolean selectCurrentParagraphAndStartDrag() { 5454 if (mInsertionActionModeRunnable != null) { 5455 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5456 } 5457 stopTextActionMode(); 5458 if (!selectCurrentParagraph()) { 5459 return false; 5460 } 5461 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5462 return true; 5463 } 5464 5465 private void updateCharacterBasedSelection(MotionEvent event) { 5466 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5467 updateSelectionInternal(mStartOffset, offset, 5468 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5469 } 5470 5471 private void updateWordBasedSelection(MotionEvent event) { 5472 if (mHaventMovedEnoughToStartDrag) { 5473 return; 5474 } 5475 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5476 final ViewConfiguration viewConfig = ViewConfiguration.get( 5477 mTextView.getContext()); 5478 final float eventX = event.getX(); 5479 final float eventY = event.getY(); 5480 final int currLine; 5481 if (isMouse) { 5482 // No need to offset the y coordinate for mouse input. 5483 currLine = mTextView.getLineAtCoordinate(eventY); 5484 } else { 5485 float y = eventY; 5486 if (mSwitchedLines) { 5487 // Offset the finger by the same vertical offset as the handles. 5488 // This improves visibility of the content being selected by 5489 // shifting the finger below the content, this is applied once 5490 // the user has switched lines. 5491 final int touchSlop = viewConfig.getScaledTouchSlop(); 5492 final float fingerOffset = (mStartHandle != null) 5493 ? mStartHandle.getIdealVerticalOffset() 5494 : touchSlop; 5495 y = eventY - fingerOffset; 5496 } 5497 5498 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5499 y); 5500 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5501 // Break early here, we want to offset the finger position from 5502 // the selection highlight, once the user moved their finger 5503 // to a different line we should apply the offset and *not* switch 5504 // lines until recomputing the position with the finger offset. 5505 mSwitchedLines = true; 5506 return; 5507 } 5508 } 5509 5510 int startOffset; 5511 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5512 // Snap to word boundaries. 5513 if (mStartOffset < offset) { 5514 // Expanding with end handle. 5515 offset = getWordEnd(offset); 5516 startOffset = getWordStart(mStartOffset); 5517 } else { 5518 // Expanding with start handle. 5519 offset = getWordStart(offset); 5520 startOffset = getWordEnd(mStartOffset); 5521 if (startOffset == offset) { 5522 offset = getNextCursorOffset(offset, false); 5523 } 5524 } 5525 mLineSelectionIsOn = currLine; 5526 updateSelectionInternal(startOffset, offset, 5527 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5528 } 5529 5530 private void updateParagraphBasedSelection(MotionEvent event) { 5531 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5532 5533 final int start = Math.min(offset, mStartOffset); 5534 final int end = Math.max(offset, mStartOffset); 5535 final long paragraphsRange = getParagraphsRange(start, end); 5536 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5537 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5538 updateSelectionInternal(selectionStart, selectionEnd, 5539 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5540 } 5541 5542 private void updateSelectionInternal(int selectionStart, int selectionEnd, 5543 boolean fromTouchScreen) { 5544 final boolean performHapticFeedback = fromTouchScreen && mHapticTextHandleEnabled 5545 && ((mTextView.getSelectionStart() != selectionStart) 5546 || (mTextView.getSelectionEnd() != selectionEnd)); 5547 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5548 if (performHapticFeedback) { 5549 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 5550 } 5551 } 5552 5553 /** 5554 * @param event 5555 */ 5556 private void updateMinAndMaxOffsets(MotionEvent event) { 5557 int pointerCount = event.getPointerCount(); 5558 for (int index = 0; index < pointerCount; index++) { 5559 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5560 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5561 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5562 } 5563 } 5564 5565 public int getMinTouchOffset() { 5566 return mMinTouchOffset; 5567 } 5568 5569 public int getMaxTouchOffset() { 5570 return mMaxTouchOffset; 5571 } 5572 5573 public void resetTouchOffsets() { 5574 mMinTouchOffset = mMaxTouchOffset = -1; 5575 resetDragAcceleratorState(); 5576 } 5577 5578 private void resetDragAcceleratorState() { 5579 mStartOffset = -1; 5580 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5581 mSwitchedLines = false; 5582 final int selectionStart = mTextView.getSelectionStart(); 5583 final int selectionEnd = mTextView.getSelectionEnd(); 5584 if (selectionStart > selectionEnd) { 5585 Selection.setSelection((Spannable) mTextView.getText(), 5586 selectionEnd, selectionStart); 5587 } 5588 } 5589 5590 /** 5591 * @return true iff this controller is currently used to move the selection start. 5592 */ 5593 public boolean isSelectionStartDragged() { 5594 return mStartHandle != null && mStartHandle.isDragging(); 5595 } 5596 5597 @Override 5598 public boolean isCursorBeingModified() { 5599 return isDragAcceleratorActive() || isSelectionStartDragged() 5600 || (mEndHandle != null && mEndHandle.isDragging()); 5601 } 5602 5603 /** 5604 * @return true if the user is selecting text using the drag accelerator. 5605 */ 5606 public boolean isDragAcceleratorActive() { 5607 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5608 } 5609 5610 public void onTouchModeChanged(boolean isInTouchMode) { 5611 if (!isInTouchMode) { 5612 hide(); 5613 } 5614 } 5615 5616 @Override 5617 public void onDetached() { 5618 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5619 observer.removeOnTouchModeChangeListener(this); 5620 5621 if (mStartHandle != null) mStartHandle.onDetached(); 5622 if (mEndHandle != null) mEndHandle.onDetached(); 5623 } 5624 5625 @Override 5626 public boolean isActive() { 5627 return mStartHandle != null && mStartHandle.isShowing(); 5628 } 5629 5630 public void invalidateHandles() { 5631 if (mStartHandle != null) { 5632 mStartHandle.invalidate(); 5633 } 5634 if (mEndHandle != null) { 5635 mEndHandle.invalidate(); 5636 } 5637 } 5638 } 5639 5640 private class CorrectionHighlighter { 5641 private final Path mPath = new Path(); 5642 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5643 private int mStart, mEnd; 5644 private long mFadingStartTime; 5645 private RectF mTempRectF; 5646 private static final int FADE_OUT_DURATION = 400; 5647 5648 public CorrectionHighlighter() { 5649 mPaint.setCompatibilityScaling( 5650 mTextView.getResources().getCompatibilityInfo().applicationScale); 5651 mPaint.setStyle(Paint.Style.FILL); 5652 } 5653 5654 public void highlight(CorrectionInfo info) { 5655 mStart = info.getOffset(); 5656 mEnd = mStart + info.getNewText().length(); 5657 mFadingStartTime = SystemClock.uptimeMillis(); 5658 5659 if (mStart < 0 || mEnd < 0) { 5660 stopAnimation(); 5661 } 5662 } 5663 5664 public void draw(Canvas canvas, int cursorOffsetVertical) { 5665 if (updatePath() && updatePaint()) { 5666 if (cursorOffsetVertical != 0) { 5667 canvas.translate(0, cursorOffsetVertical); 5668 } 5669 5670 canvas.drawPath(mPath, mPaint); 5671 5672 if (cursorOffsetVertical != 0) { 5673 canvas.translate(0, -cursorOffsetVertical); 5674 } 5675 invalidate(true); // TODO invalidate cursor region only 5676 } else { 5677 stopAnimation(); 5678 invalidate(false); // TODO invalidate cursor region only 5679 } 5680 } 5681 5682 private boolean updatePaint() { 5683 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5684 if (duration > FADE_OUT_DURATION) return false; 5685 5686 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5687 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5688 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5689 + ((int) (highlightColorAlpha * coef) << 24); 5690 mPaint.setColor(color); 5691 return true; 5692 } 5693 5694 private boolean updatePath() { 5695 final Layout layout = mTextView.getLayout(); 5696 if (layout == null) return false; 5697 5698 // Update in case text is edited while the animation is run 5699 final int length = mTextView.getText().length(); 5700 int start = Math.min(length, mStart); 5701 int end = Math.min(length, mEnd); 5702 5703 mPath.reset(); 5704 layout.getSelectionPath(start, end, mPath); 5705 return true; 5706 } 5707 5708 private void invalidate(boolean delayed) { 5709 if (mTextView.getLayout() == null) return; 5710 5711 if (mTempRectF == null) mTempRectF = new RectF(); 5712 mPath.computeBounds(mTempRectF, false); 5713 5714 int left = mTextView.getCompoundPaddingLeft(); 5715 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5716 5717 if (delayed) { 5718 mTextView.postInvalidateOnAnimation( 5719 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5720 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5721 } else { 5722 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5723 (int) mTempRectF.right, (int) mTempRectF.bottom); 5724 } 5725 } 5726 5727 private void stopAnimation() { 5728 Editor.this.mCorrectionHighlighter = null; 5729 } 5730 } 5731 5732 private static class ErrorPopup extends PopupWindow { 5733 private boolean mAbove = false; 5734 private final TextView mView; 5735 private int mPopupInlineErrorBackgroundId = 0; 5736 private int mPopupInlineErrorAboveBackgroundId = 0; 5737 5738 ErrorPopup(TextView v, int width, int height) { 5739 super(v, width, height); 5740 mView = v; 5741 // Make sure the TextView has a background set as it will be used the first time it is 5742 // shown and positioned. Initialized with below background, which should have 5743 // dimensions identical to the above version for this to work (and is more likely). 5744 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5745 com.android.internal.R.styleable.Theme_errorMessageBackground); 5746 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5747 } 5748 5749 void fixDirection(boolean above) { 5750 mAbove = above; 5751 5752 if (above) { 5753 mPopupInlineErrorAboveBackgroundId = 5754 getResourceId(mPopupInlineErrorAboveBackgroundId, 5755 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5756 } else { 5757 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5758 com.android.internal.R.styleable.Theme_errorMessageBackground); 5759 } 5760 5761 mView.setBackgroundResource( 5762 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5763 } 5764 5765 private int getResourceId(int currentId, int index) { 5766 if (currentId == 0) { 5767 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5768 R.styleable.Theme); 5769 currentId = styledAttributes.getResourceId(index, 0); 5770 styledAttributes.recycle(); 5771 } 5772 return currentId; 5773 } 5774 5775 @Override 5776 public void update(int x, int y, int w, int h, boolean force) { 5777 super.update(x, y, w, h, force); 5778 5779 boolean above = isAboveAnchor(); 5780 if (above != mAbove) { 5781 fixDirection(above); 5782 } 5783 } 5784 } 5785 5786 static class InputContentType { 5787 int imeOptions = EditorInfo.IME_NULL; 5788 String privateImeOptions; 5789 CharSequence imeActionLabel; 5790 int imeActionId; 5791 Bundle extras; 5792 OnEditorActionListener onEditorActionListener; 5793 boolean enterDown; 5794 LocaleList imeHintLocales; 5795 } 5796 5797 static class InputMethodState { 5798 ExtractedTextRequest mExtractedTextRequest; 5799 final ExtractedText mExtractedText = new ExtractedText(); 5800 int mBatchEditNesting; 5801 boolean mCursorChanged; 5802 boolean mSelectionModeChanged; 5803 boolean mContentChanged; 5804 int mChangedStart, mChangedEnd, mChangedDelta; 5805 } 5806 5807 /** 5808 * @return True iff (start, end) is a valid range within the text. 5809 */ 5810 private static boolean isValidRange(CharSequence text, int start, int end) { 5811 return 0 <= start && start <= end && end <= text.length(); 5812 } 5813 5814 @VisibleForTesting 5815 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5816 return mSuggestionsPopupWindow; 5817 } 5818 5819 /** 5820 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5821 * text being typed (and hence always returns null from the filter() method). 5822 * 5823 * TODO: Make this span aware. 5824 */ 5825 public static class UndoInputFilter implements InputFilter { 5826 private final Editor mEditor; 5827 5828 // Whether the current filter pass is directly caused by an end-user text edit. 5829 private boolean mIsUserEdit; 5830 5831 // Whether the text field is handling an IME composition. Must be parceled in case the user 5832 // rotates the screen during composition. 5833 private boolean mHasComposition; 5834 5835 // Whether the user is expanding or shortening the text 5836 private boolean mExpanding; 5837 5838 // Whether the previous edit operation was in the current batch edit. 5839 private boolean mPreviousOperationWasInSameBatchEdit; 5840 5841 public UndoInputFilter(Editor editor) { 5842 mEditor = editor; 5843 } 5844 5845 public void saveInstanceState(Parcel parcel) { 5846 parcel.writeInt(mIsUserEdit ? 1 : 0); 5847 parcel.writeInt(mHasComposition ? 1 : 0); 5848 parcel.writeInt(mExpanding ? 1 : 0); 5849 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5850 } 5851 5852 public void restoreInstanceState(Parcel parcel) { 5853 mIsUserEdit = parcel.readInt() != 0; 5854 mHasComposition = parcel.readInt() != 0; 5855 mExpanding = parcel.readInt() != 0; 5856 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5857 } 5858 5859 /** 5860 * Signals that a user-triggered edit is starting. 5861 */ 5862 public void beginBatchEdit() { 5863 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5864 mIsUserEdit = true; 5865 } 5866 5867 public void endBatchEdit() { 5868 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5869 mIsUserEdit = false; 5870 mPreviousOperationWasInSameBatchEdit = false; 5871 } 5872 5873 @Override 5874 public CharSequence filter(CharSequence source, int start, int end, 5875 Spanned dest, int dstart, int dend) { 5876 if (DEBUG_UNDO) { 5877 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 5878 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5879 } 5880 5881 // Check to see if this edit should be tracked for undo. 5882 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5883 return null; 5884 } 5885 5886 final boolean hadComposition = mHasComposition; 5887 mHasComposition = isComposition(source); 5888 final boolean wasExpanding = mExpanding; 5889 boolean shouldCreateSeparateState = false; 5890 if ((end - start) != (dend - dstart)) { 5891 mExpanding = (end - start) > (dend - dstart); 5892 if (hadComposition && mExpanding != wasExpanding) { 5893 shouldCreateSeparateState = true; 5894 } 5895 } 5896 5897 // Handle edit. 5898 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5899 return null; 5900 } 5901 5902 void freezeLastEdit() { 5903 mEditor.mUndoManager.beginUpdate("Edit text"); 5904 EditOperation lastEdit = getLastEdit(); 5905 if (lastEdit != null) { 5906 lastEdit.mFrozen = true; 5907 } 5908 mEditor.mUndoManager.endUpdate(); 5909 } 5910 5911 @Retention(RetentionPolicy.SOURCE) 5912 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5913 private @interface MergeMode {} 5914 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5915 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5916 /** Use {@link EditOperation#mergeWith} to merge */ 5917 private static final int MERGE_EDIT_MODE_NORMAL = 2; 5918 5919 private void handleEdit(CharSequence source, int start, int end, 5920 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5921 // An application may install a TextWatcher to provide additional modifications after 5922 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5923 // string). This results in multiple filter() calls for what the user considers to be 5924 // a single operation. Always undo the whole set of changes in one step. 5925 @MergeMode 5926 final int mergeMode; 5927 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5928 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5929 } else if (shouldCreateSeparateState) { 5930 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5931 } else { 5932 mergeMode = MERGE_EDIT_MODE_NORMAL; 5933 } 5934 // Build a new operation with all the information from this edit. 5935 String newText = TextUtils.substring(source, start, end); 5936 String oldText = TextUtils.substring(dest, dstart, dend); 5937 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5938 mHasComposition); 5939 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5940 return; 5941 } 5942 recordEdit(edit, mergeMode); 5943 } 5944 5945 private EditOperation getLastEdit() { 5946 final UndoManager um = mEditor.mUndoManager; 5947 return um.getLastOperation( 5948 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5949 } 5950 /** 5951 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5952 * If forceMerge is true then the new edit is always merged. 5953 */ 5954 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5955 // Fetch the last edit operation and attempt to merge in the new edit. 5956 final UndoManager um = mEditor.mUndoManager; 5957 um.beginUpdate("Edit text"); 5958 EditOperation lastEdit = getLastEdit(); 5959 if (lastEdit == null) { 5960 // Add this as the first edit. 5961 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5962 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5963 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5964 // Forced merges take priority because they could be the result of a non-user-edit 5965 // change and this case should not create a new undo operation. 5966 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5967 lastEdit.forceMergeWith(edit); 5968 } else if (!mIsUserEdit) { 5969 // An application directly modified the Editable outside of a text edit. Treat this 5970 // as a new change and don't attempt to merge. 5971 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5972 um.commitState(mEditor.mUndoOwner); 5973 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5974 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 5975 // Merge succeeded, nothing else to do. 5976 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5977 } else { 5978 // Could not merge with the last edit, so commit the last edit and add this edit. 5979 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5980 um.commitState(mEditor.mUndoOwner); 5981 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5982 } 5983 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 5984 um.endUpdate(); 5985 } 5986 5987 private boolean canUndoEdit(CharSequence source, int start, int end, 5988 Spanned dest, int dstart, int dend) { 5989 if (!mEditor.mAllowUndo) { 5990 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5991 return false; 5992 } 5993 5994 if (mEditor.mUndoManager.isInUndo()) { 5995 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5996 return false; 5997 } 5998 5999 // Text filters run before input operations are applied. However, some input operations 6000 // are invalid and will throw exceptions when applied. This is common in tests. Don't 6001 // attempt to undo invalid operations. 6002 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 6003 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 6004 return false; 6005 } 6006 6007 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 6008 // on an input field. Skip no-op changes. 6009 if (start == end && dstart == dend) { 6010 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 6011 return false; 6012 } 6013 6014 return true; 6015 } 6016 6017 private static boolean isComposition(CharSequence source) { 6018 if (!(source instanceof Spannable)) { 6019 return false; 6020 } 6021 // This is a composition edit if the source has a non-zero-length composing span. 6022 Spannable text = (Spannable) source; 6023 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6024 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6025 return composeBegin < composeEnd; 6026 } 6027 6028 private boolean isInTextWatcher() { 6029 CharSequence text = mEditor.mTextView.getText(); 6030 return (text instanceof SpannableStringBuilder) 6031 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6032 } 6033 } 6034 6035 /** 6036 * An operation to undo a single "edit" to a text view. 6037 */ 6038 public static class EditOperation extends UndoOperation<Editor> { 6039 private static final int TYPE_INSERT = 0; 6040 private static final int TYPE_DELETE = 1; 6041 private static final int TYPE_REPLACE = 2; 6042 6043 private int mType; 6044 private String mOldText; 6045 private String mNewText; 6046 private int mStart; 6047 6048 private int mOldCursorPos; 6049 private int mNewCursorPos; 6050 private boolean mFrozen; 6051 private boolean mIsComposition; 6052 6053 /** 6054 * Constructs an edit operation from a text input operation on editor that replaces the 6055 * oldText starting at dstart with newText. 6056 */ 6057 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6058 boolean isComposition) { 6059 super(editor.mUndoOwner); 6060 mOldText = oldText; 6061 mNewText = newText; 6062 6063 // Determine the type of the edit. 6064 if (mNewText.length() > 0 && mOldText.length() == 0) { 6065 mType = TYPE_INSERT; 6066 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6067 mType = TYPE_DELETE; 6068 } else { 6069 mType = TYPE_REPLACE; 6070 } 6071 6072 mStart = dstart; 6073 // Store cursor data. 6074 mOldCursorPos = editor.mTextView.getSelectionStart(); 6075 mNewCursorPos = dstart + mNewText.length(); 6076 mIsComposition = isComposition; 6077 } 6078 6079 public EditOperation(Parcel src, ClassLoader loader) { 6080 super(src, loader); 6081 mType = src.readInt(); 6082 mOldText = src.readString(); 6083 mNewText = src.readString(); 6084 mStart = src.readInt(); 6085 mOldCursorPos = src.readInt(); 6086 mNewCursorPos = src.readInt(); 6087 mFrozen = src.readInt() == 1; 6088 mIsComposition = src.readInt() == 1; 6089 } 6090 6091 @Override 6092 public void writeToParcel(Parcel dest, int flags) { 6093 dest.writeInt(mType); 6094 dest.writeString(mOldText); 6095 dest.writeString(mNewText); 6096 dest.writeInt(mStart); 6097 dest.writeInt(mOldCursorPos); 6098 dest.writeInt(mNewCursorPos); 6099 dest.writeInt(mFrozen ? 1 : 0); 6100 dest.writeInt(mIsComposition ? 1 : 0); 6101 } 6102 6103 private int getNewTextEnd() { 6104 return mStart + mNewText.length(); 6105 } 6106 6107 private int getOldTextEnd() { 6108 return mStart + mOldText.length(); 6109 } 6110 6111 @Override 6112 public void commit() { 6113 } 6114 6115 @Override 6116 public void undo() { 6117 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6118 // Remove the new text and insert the old. 6119 Editor editor = getOwnerData(); 6120 Editable text = (Editable) editor.mTextView.getText(); 6121 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6122 } 6123 6124 @Override 6125 public void redo() { 6126 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6127 // Remove the old text and insert the new. 6128 Editor editor = getOwnerData(); 6129 Editable text = (Editable) editor.mTextView.getText(); 6130 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6131 } 6132 6133 /** 6134 * Attempts to merge this existing operation with a new edit. 6135 * @param edit The new edit operation. 6136 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6137 * object unchanged. 6138 */ 6139 private boolean mergeWith(EditOperation edit) { 6140 if (DEBUG_UNDO) { 6141 Log.d(TAG, "mergeWith old " + this); 6142 Log.d(TAG, "mergeWith new " + edit); 6143 } 6144 6145 if (mFrozen) { 6146 return false; 6147 } 6148 6149 switch (mType) { 6150 case TYPE_INSERT: 6151 return mergeInsertWith(edit); 6152 case TYPE_DELETE: 6153 return mergeDeleteWith(edit); 6154 case TYPE_REPLACE: 6155 return mergeReplaceWith(edit); 6156 default: 6157 return false; 6158 } 6159 } 6160 6161 private boolean mergeInsertWith(EditOperation edit) { 6162 if (edit.mType == TYPE_INSERT) { 6163 // Merge insertions that are contiguous even when it's frozen. 6164 if (getNewTextEnd() != edit.mStart) { 6165 return false; 6166 } 6167 mNewText += edit.mNewText; 6168 mNewCursorPos = edit.mNewCursorPos; 6169 mFrozen = edit.mFrozen; 6170 mIsComposition = edit.mIsComposition; 6171 return true; 6172 } 6173 if (mIsComposition && edit.mType == TYPE_REPLACE 6174 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6175 // Merge insertion with replace as they can be single insertion. 6176 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6177 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6178 mNewCursorPos = edit.mNewCursorPos; 6179 mIsComposition = edit.mIsComposition; 6180 return true; 6181 } 6182 return false; 6183 } 6184 6185 // TODO: Support forward delete. 6186 private boolean mergeDeleteWith(EditOperation edit) { 6187 // Only merge continuous deletes. 6188 if (edit.mType != TYPE_DELETE) { 6189 return false; 6190 } 6191 // Only merge deletions that are contiguous. 6192 if (mStart != edit.getOldTextEnd()) { 6193 return false; 6194 } 6195 mStart = edit.mStart; 6196 mOldText = edit.mOldText + mOldText; 6197 mNewCursorPos = edit.mNewCursorPos; 6198 mIsComposition = edit.mIsComposition; 6199 return true; 6200 } 6201 6202 private boolean mergeReplaceWith(EditOperation edit) { 6203 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6204 // Merge with adjacent insert. 6205 mNewText += edit.mNewText; 6206 mNewCursorPos = edit.mNewCursorPos; 6207 return true; 6208 } 6209 if (!mIsComposition) { 6210 return false; 6211 } 6212 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6213 && getNewTextEnd() >= edit.getOldTextEnd()) { 6214 // Merge with delete as they can be single operation. 6215 mNewText = mNewText.substring(0, edit.mStart - mStart) 6216 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6217 if (mNewText.isEmpty()) { 6218 mType = TYPE_DELETE; 6219 } 6220 mNewCursorPos = edit.mNewCursorPos; 6221 mIsComposition = edit.mIsComposition; 6222 return true; 6223 } 6224 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6225 && TextUtils.equals(mNewText, edit.mOldText)) { 6226 // Merge with the replace that replaces the same region. 6227 mNewText = edit.mNewText; 6228 mNewCursorPos = edit.mNewCursorPos; 6229 mIsComposition = edit.mIsComposition; 6230 return true; 6231 } 6232 return false; 6233 } 6234 6235 /** 6236 * Forcibly creates a single merged edit operation by simulating the entire text 6237 * contents being replaced. 6238 */ 6239 public void forceMergeWith(EditOperation edit) { 6240 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6241 if (mergeWith(edit)) { 6242 return; 6243 } 6244 Editor editor = getOwnerData(); 6245 6246 // Copy the text of the current field. 6247 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6248 // but would require two parallel implementations of modifyText() because Editable and 6249 // StringBuilder do not share an interface for replace/delete/insert. 6250 Editable editable = (Editable) editor.mTextView.getText(); 6251 Editable originalText = new SpannableStringBuilder(editable.toString()); 6252 6253 // Roll back the last operation. 6254 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6255 6256 // Clone the text again and apply the new operation. 6257 Editable finalText = new SpannableStringBuilder(editable.toString()); 6258 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6259 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6260 6261 // Convert this operation into a replace operation. 6262 mType = TYPE_REPLACE; 6263 mNewText = finalText.toString(); 6264 mOldText = originalText.toString(); 6265 mStart = 0; 6266 mNewCursorPos = edit.mNewCursorPos; 6267 mIsComposition = edit.mIsComposition; 6268 // mOldCursorPos is unchanged. 6269 } 6270 6271 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6272 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6273 // Apply the edit if it is still valid. 6274 if (isValidRange(text, deleteFrom, deleteTo) 6275 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6276 if (deleteFrom != deleteTo) { 6277 text.delete(deleteFrom, deleteTo); 6278 } 6279 if (newText.length() != 0) { 6280 text.insert(newTextInsertAt, newText); 6281 } 6282 } 6283 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6284 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6285 // TODO: Select all the text that was undone. 6286 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6287 Selection.setSelection(text, newCursorPos); 6288 } 6289 } 6290 6291 private String getTypeString() { 6292 switch (mType) { 6293 case TYPE_INSERT: 6294 return "insert"; 6295 case TYPE_DELETE: 6296 return "delete"; 6297 case TYPE_REPLACE: 6298 return "replace"; 6299 default: 6300 return ""; 6301 } 6302 } 6303 6304 @Override 6305 public String toString() { 6306 return "[mType=" + getTypeString() + ", " 6307 + "mOldText=" + mOldText + ", " 6308 + "mNewText=" + mNewText + ", " 6309 + "mStart=" + mStart + ", " 6310 + "mOldCursorPos=" + mOldCursorPos + ", " 6311 + "mNewCursorPos=" + mNewCursorPos + ", " 6312 + "mFrozen=" + mFrozen + ", " 6313 + "mIsComposition=" + mIsComposition + "]"; 6314 } 6315 6316 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6317 new Parcelable.ClassLoaderCreator<EditOperation>() { 6318 @Override 6319 public EditOperation createFromParcel(Parcel in) { 6320 return new EditOperation(in, null); 6321 } 6322 6323 @Override 6324 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6325 return new EditOperation(in, loader); 6326 } 6327 6328 @Override 6329 public EditOperation[] newArray(int size) { 6330 return new EditOperation[size]; 6331 } 6332 }; 6333 } 6334 6335 /** 6336 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6337 * These allow external applications to plug into currently selected text. 6338 */ 6339 static final class ProcessTextIntentActionsHandler { 6340 6341 private final Editor mEditor; 6342 private final TextView mTextView; 6343 private final Context mContext; 6344 private final PackageManager mPackageManager; 6345 private final String mPackageName; 6346 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6347 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6348 new SparseArray<>(); 6349 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6350 6351 private ProcessTextIntentActionsHandler(Editor editor) { 6352 mEditor = Preconditions.checkNotNull(editor); 6353 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6354 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6355 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6356 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6357 } 6358 6359 /** 6360 * Adds "PROCESS_TEXT" menu items to the specified menu. 6361 */ 6362 public void onInitializeMenu(Menu menu) { 6363 final int size = mSupportedActivities.size(); 6364 loadSupportedActivities(); 6365 for (int i = 0; i < size; i++) { 6366 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6367 menu.add(Menu.NONE, Menu.NONE, 6368 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6369 getLabel(resolveInfo)) 6370 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6371 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6372 } 6373 } 6374 6375 /** 6376 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6377 * menu item. 6378 * 6379 * @return True if the action was performed, false otherwise. 6380 */ 6381 public boolean performMenuItemAction(MenuItem item) { 6382 return fireIntent(item.getIntent()); 6383 } 6384 6385 /** 6386 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6387 */ 6388 public void initializeAccessibilityActions() { 6389 mAccessibilityIntents.clear(); 6390 mAccessibilityActions.clear(); 6391 int i = 0; 6392 loadSupportedActivities(); 6393 for (ResolveInfo resolveInfo : mSupportedActivities) { 6394 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6395 mAccessibilityActions.put( 6396 actionId, 6397 new AccessibilityNodeInfo.AccessibilityAction( 6398 actionId, getLabel(resolveInfo))); 6399 mAccessibilityIntents.put( 6400 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6401 } 6402 } 6403 6404 /** 6405 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6406 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6407 * latest accessibility actions available for this call. 6408 */ 6409 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6410 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6411 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6412 } 6413 } 6414 6415 /** 6416 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6417 * accessibility action id. 6418 * 6419 * @return True if the action was performed, false otherwise. 6420 */ 6421 public boolean performAccessibilityAction(int actionId) { 6422 return fireIntent(mAccessibilityIntents.get(actionId)); 6423 } 6424 6425 private boolean fireIntent(Intent intent) { 6426 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6427 String selectedText = mTextView.getSelectedText(); 6428 selectedText = TextUtils.trimToParcelableSize(selectedText); 6429 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, selectedText); 6430 mEditor.mPreserveSelection = true; 6431 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6432 return true; 6433 } 6434 return false; 6435 } 6436 6437 private void loadSupportedActivities() { 6438 mSupportedActivities.clear(); 6439 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6440 List<ResolveInfo> unfiltered = 6441 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6442 for (ResolveInfo info : unfiltered) { 6443 if (isSupportedActivity(info)) { 6444 mSupportedActivities.add(info); 6445 } 6446 } 6447 } 6448 6449 private boolean isSupportedActivity(ResolveInfo info) { 6450 return mPackageName.equals(info.activityInfo.packageName) 6451 || info.activityInfo.exported 6452 && (info.activityInfo.permission == null 6453 || mContext.checkSelfPermission(info.activityInfo.permission) 6454 == PackageManager.PERMISSION_GRANTED); 6455 } 6456 6457 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6458 return createProcessTextIntent() 6459 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6460 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6461 } 6462 6463 private Intent createProcessTextIntent() { 6464 return new Intent() 6465 .setAction(Intent.ACTION_PROCESS_TEXT) 6466 .setType("text/plain"); 6467 } 6468 6469 private CharSequence getLabel(ResolveInfo resolveInfo) { 6470 return resolveInfo.loadLabel(mPackageManager); 6471 } 6472 } 6473} 6474