Editor.java revision 2ac463e3f5c3b757ecbc7e30e0fc1e8e0d878272
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.IntDef; 21import android.annotation.NonNull; 22import android.annotation.Nullable; 23import android.app.PendingIntent; 24import android.app.PendingIntent.CanceledException; 25import android.content.ClipData; 26import android.content.ClipData.Item; 27import android.content.Context; 28import android.content.Intent; 29import android.content.UndoManager; 30import android.content.UndoOperation; 31import android.content.UndoOwner; 32import android.content.pm.PackageManager; 33import android.content.pm.ResolveInfo; 34import android.content.res.TypedArray; 35import android.graphics.Canvas; 36import android.graphics.Color; 37import android.graphics.Matrix; 38import android.graphics.Paint; 39import android.graphics.Path; 40import android.graphics.Rect; 41import android.graphics.RectF; 42import android.graphics.drawable.ColorDrawable; 43import android.graphics.drawable.Drawable; 44import android.os.Bundle; 45import android.os.LocaleList; 46import android.os.Parcel; 47import android.os.Parcelable; 48import android.os.ParcelableParcel; 49import android.os.SystemClock; 50import android.provider.Settings; 51import android.text.DynamicLayout; 52import android.text.Editable; 53import android.text.InputFilter; 54import android.text.InputType; 55import android.text.Layout; 56import android.text.ParcelableSpan; 57import android.text.Selection; 58import android.text.SpanWatcher; 59import android.text.Spannable; 60import android.text.SpannableStringBuilder; 61import android.text.Spanned; 62import android.text.StaticLayout; 63import android.text.TextUtils; 64import android.text.method.KeyListener; 65import android.text.method.MetaKeyKeyListener; 66import android.text.method.MovementMethod; 67import android.text.method.WordIterator; 68import android.text.style.EasyEditSpan; 69import android.text.style.SuggestionRangeSpan; 70import android.text.style.SuggestionSpan; 71import android.text.style.TextAppearanceSpan; 72import android.text.style.URLSpan; 73import android.util.ArraySet; 74import android.util.DisplayMetrics; 75import android.util.Log; 76import android.util.SparseArray; 77import android.view.ActionMode; 78import android.view.ActionMode.Callback; 79import android.view.ContextMenu; 80import android.view.ContextThemeWrapper; 81import android.view.DisplayListCanvas; 82import android.view.DragAndDropPermissions; 83import android.view.DragEvent; 84import android.view.Gravity; 85import android.view.InputDevice; 86import android.view.LayoutInflater; 87import android.view.Menu; 88import android.view.MenuItem; 89import android.view.MotionEvent; 90import android.view.RenderNode; 91import android.view.SubMenu; 92import android.view.View; 93import android.view.View.DragShadowBuilder; 94import android.view.View.OnClickListener; 95import android.view.ViewConfiguration; 96import android.view.ViewGroup; 97import android.view.ViewGroup.LayoutParams; 98import android.view.ViewTreeObserver; 99import android.view.WindowManager; 100import android.view.accessibility.AccessibilityNodeInfo; 101import android.view.inputmethod.CorrectionInfo; 102import android.view.inputmethod.CursorAnchorInfo; 103import android.view.inputmethod.EditorInfo; 104import android.view.inputmethod.ExtractedText; 105import android.view.inputmethod.ExtractedTextRequest; 106import android.view.inputmethod.InputConnection; 107import android.view.inputmethod.InputMethodManager; 108import android.view.textclassifier.TextClassificationResult; 109import android.widget.AdapterView.OnItemClickListener; 110import android.widget.TextView.Drawables; 111import android.widget.TextView.OnEditorActionListener; 112 113import com.android.internal.annotations.VisibleForTesting; 114import com.android.internal.logging.MetricsLogger; 115import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 116import com.android.internal.util.ArrayUtils; 117import com.android.internal.util.GrowingArrayUtils; 118import com.android.internal.util.Preconditions; 119import com.android.internal.widget.EditableInputConnection; 120 121import java.lang.annotation.Retention; 122import java.lang.annotation.RetentionPolicy; 123import java.text.BreakIterator; 124import java.util.ArrayList; 125import java.util.Arrays; 126import java.util.Comparator; 127import java.util.HashMap; 128import java.util.List; 129 130 131/** 132 * Helper class used by TextView to handle editable text views. 133 * 134 * @hide 135 */ 136public class Editor { 137 private static final String TAG = "Editor"; 138 private static final boolean DEBUG_UNDO = false; 139 140 static final int BLINK = 500; 141 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 142 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 143 private static final int UNSET_X_VALUE = -1; 144 private static final int UNSET_LINE = -1; 145 // Tag used when the Editor maintains its own separate UndoManager. 146 private static final String UNDO_OWNER_TAG = "Editor"; 147 148 // Ordering constants used to place the Action Mode or context menu items in their menu. 149 private static final int MENU_ITEM_ORDER_ASSIST = 1; 150 private static final int MENU_ITEM_ORDER_UNDO = 2; 151 private static final int MENU_ITEM_ORDER_REDO = 3; 152 private static final int MENU_ITEM_ORDER_CUT = 4; 153 private static final int MENU_ITEM_ORDER_COPY = 5; 154 private static final int MENU_ITEM_ORDER_PASTE = 6; 155 private static final int MENU_ITEM_ORDER_SHARE = 7; 156 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 8; 157 private static final int MENU_ITEM_ORDER_SELECT_ALL = 9; 158 private static final int MENU_ITEM_ORDER_REPLACE = 10; 159 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 11; 160 private static final int MENU_ITEM_ORDER_AUTOFILL = 12; 161 162 // Each Editor manages its own undo stack. 163 private final UndoManager mUndoManager = new UndoManager(); 164 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 165 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 166 boolean mAllowUndo = true; 167 168 // Cursor Controllers. 169 private InsertionPointCursorController mInsertionPointCursorController; 170 SelectionModifierCursorController mSelectionModifierCursorController; 171 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 172 private ActionMode mTextActionMode; 173 private boolean mInsertionControllerEnabled; 174 private boolean mSelectionControllerEnabled; 175 176 // Used to highlight a word when it is corrected by the IME 177 private CorrectionHighlighter mCorrectionHighlighter; 178 179 InputContentType mInputContentType; 180 InputMethodState mInputMethodState; 181 182 private static class TextRenderNode { 183 // Render node has 3 recording states: 184 // 1. Recorded operations are valid. 185 // #needsRecord() returns false, but needsToBeShifted is false. 186 // 2. Recorded operations are not valid, but just the position needed to be updated. 187 // #needsRecord() returns false, but needsToBeShifted is true. 188 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 189 // true. 190 RenderNode renderNode; 191 boolean isDirty; 192 // Becomes true when recorded operations can be reused, but the position has to be updated. 193 boolean needsToBeShifted; 194 public TextRenderNode(String name) { 195 renderNode = RenderNode.create(name, null); 196 isDirty = true; 197 needsToBeShifted = true; 198 } 199 boolean needsRecord() { 200 return isDirty || !renderNode.isValid(); 201 } 202 } 203 private TextRenderNode[] mTextRenderNodes; 204 205 boolean mFrozenWithFocus; 206 boolean mSelectionMoved; 207 boolean mTouchFocusSelected; 208 209 KeyListener mKeyListener; 210 int mInputType = EditorInfo.TYPE_NULL; 211 212 boolean mDiscardNextActionUp; 213 boolean mIgnoreActionUpEvent; 214 215 long mShowCursor; 216 private Blink mBlink; 217 218 boolean mCursorVisible = true; 219 boolean mSelectAllOnFocus; 220 boolean mTextIsSelectable; 221 222 CharSequence mError; 223 boolean mErrorWasChanged; 224 private ErrorPopup mErrorPopup; 225 226 /** 227 * This flag is set if the TextView tries to display an error before it 228 * is attached to the window (so its position is still unknown). 229 * It causes the error to be shown later, when onAttachedToWindow() 230 * is called. 231 */ 232 private boolean mShowErrorAfterAttach; 233 234 boolean mInBatchEditControllers; 235 boolean mShowSoftInputOnFocus = true; 236 private boolean mPreserveSelection; 237 private boolean mRestartActionModeOnNextRefresh; 238 239 private SelectionActionModeHelper mSelectionActionModeHelper; 240 241 boolean mIsBeingLongClicked; 242 243 private SuggestionsPopupWindow mSuggestionsPopupWindow; 244 SuggestionRangeSpan mSuggestionRangeSpan; 245 private Runnable mShowSuggestionRunnable; 246 247 final Drawable[] mCursorDrawable = new Drawable[2]; 248 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 249 250 private Drawable mSelectHandleLeft; 251 private Drawable mSelectHandleRight; 252 private Drawable mSelectHandleCenter; 253 254 // Global listener that detects changes in the global position of the TextView 255 private PositionListener mPositionListener; 256 257 private float mLastDownPositionX, mLastDownPositionY; 258 private float mContextMenuAnchorX, mContextMenuAnchorY; 259 Callback mCustomSelectionActionModeCallback; 260 Callback mCustomInsertionActionModeCallback; 261 262 // Set when this TextView gained focus with some text selected. Will start selection mode. 263 boolean mCreatedWithASelection; 264 265 // Indicates the current tap state (first tap, double tap, or triple click). 266 private int mTapState = TAP_STATE_INITIAL; 267 private long mLastTouchUpTime = 0; 268 private static final int TAP_STATE_INITIAL = 0; 269 private static final int TAP_STATE_FIRST_TAP = 1; 270 private static final int TAP_STATE_DOUBLE_TAP = 2; 271 // Only for mouse input. 272 private static final int TAP_STATE_TRIPLE_CLICK = 3; 273 274 // The button state as of the last time #onTouchEvent is called. 275 private int mLastButtonState; 276 277 private Runnable mInsertionActionModeRunnable; 278 279 // The span controller helps monitoring the changes to which the Editor needs to react: 280 // - EasyEditSpans, for which we have some UI to display on attach and on hide 281 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 282 private SpanController mSpanController; 283 284 private WordIterator mWordIterator; 285 SpellChecker mSpellChecker; 286 287 // This word iterator is set with text and used to determine word boundaries 288 // when a user is selecting text. 289 private WordIterator mWordIteratorWithText; 290 // Indicate that the text in the word iterator needs to be updated. 291 private boolean mUpdateWordIteratorText; 292 293 private Rect mTempRect; 294 295 private final TextView mTextView; 296 297 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 298 299 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 300 new CursorAnchorInfoNotifier(); 301 302 private final Runnable mShowFloatingToolbar = new Runnable() { 303 @Override 304 public void run() { 305 if (mTextActionMode != null) { 306 mTextActionMode.hide(0); // hide off. 307 } 308 } 309 }; 310 311 boolean mIsInsertionActionModeStartPending = false; 312 313 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 314 315 Editor(TextView textView) { 316 mTextView = textView; 317 // Synchronize the filter list, which places the undo input filter at the end. 318 mTextView.setFilters(mTextView.getFilters()); 319 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 320 } 321 322 ParcelableParcel saveInstanceState() { 323 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 324 Parcel parcel = state.getParcel(); 325 mUndoManager.saveInstanceState(parcel); 326 mUndoInputFilter.saveInstanceState(parcel); 327 return state; 328 } 329 330 void restoreInstanceState(ParcelableParcel state) { 331 Parcel parcel = state.getParcel(); 332 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 333 mUndoInputFilter.restoreInstanceState(parcel); 334 // Re-associate this object as the owner of undo state. 335 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 336 } 337 338 /** 339 * Forgets all undo and redo operations for this Editor. 340 */ 341 void forgetUndoRedo() { 342 UndoOwner[] owners = { mUndoOwner }; 343 mUndoManager.forgetUndos(owners, -1 /* all */); 344 mUndoManager.forgetRedos(owners, -1 /* all */); 345 } 346 347 boolean canUndo() { 348 UndoOwner[] owners = { mUndoOwner }; 349 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 350 } 351 352 boolean canRedo() { 353 UndoOwner[] owners = { mUndoOwner }; 354 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 355 } 356 357 void undo() { 358 if (!mAllowUndo) { 359 return; 360 } 361 UndoOwner[] owners = { mUndoOwner }; 362 mUndoManager.undo(owners, 1); // Undo 1 action. 363 } 364 365 void redo() { 366 if (!mAllowUndo) { 367 return; 368 } 369 UndoOwner[] owners = { mUndoOwner }; 370 mUndoManager.redo(owners, 1); // Redo 1 action. 371 } 372 373 void replace() { 374 if (mSuggestionsPopupWindow == null) { 375 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 376 } 377 hideCursorAndSpanControllers(); 378 mSuggestionsPopupWindow.show(); 379 380 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 381 Selection.setSelection((Spannable) mTextView.getText(), middle); 382 } 383 384 void onAttachedToWindow() { 385 if (mShowErrorAfterAttach) { 386 showError(); 387 mShowErrorAfterAttach = false; 388 } 389 390 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 391 // No need to create the controller. 392 // The get method will add the listener on controller creation. 393 if (mInsertionPointCursorController != null) { 394 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 395 } 396 if (mSelectionModifierCursorController != null) { 397 mSelectionModifierCursorController.resetTouchOffsets(); 398 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 399 } 400 updateSpellCheckSpans(0, mTextView.getText().length(), 401 true /* create the spell checker if needed */); 402 403 if (mTextView.hasSelection()) { 404 refreshTextActionMode(); 405 } 406 407 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 408 resumeBlink(); 409 } 410 411 void onDetachedFromWindow() { 412 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 413 414 if (mError != null) { 415 hideError(); 416 } 417 418 suspendBlink(); 419 420 if (mInsertionPointCursorController != null) { 421 mInsertionPointCursorController.onDetached(); 422 } 423 424 if (mSelectionModifierCursorController != null) { 425 mSelectionModifierCursorController.onDetached(); 426 } 427 428 if (mShowSuggestionRunnable != null) { 429 mTextView.removeCallbacks(mShowSuggestionRunnable); 430 } 431 432 // Cancel the single tap delayed runnable. 433 if (mInsertionActionModeRunnable != null) { 434 mTextView.removeCallbacks(mInsertionActionModeRunnable); 435 } 436 437 mTextView.removeCallbacks(mShowFloatingToolbar); 438 439 discardTextDisplayLists(); 440 441 if (mSpellChecker != null) { 442 mSpellChecker.closeSession(); 443 // Forces the creation of a new SpellChecker next time this window is created. 444 // Will handle the cases where the settings has been changed in the meantime. 445 mSpellChecker = null; 446 } 447 448 hideCursorAndSpanControllers(); 449 stopTextActionModeWithPreservingSelection(); 450 } 451 452 private void discardTextDisplayLists() { 453 if (mTextRenderNodes != null) { 454 for (int i = 0; i < mTextRenderNodes.length; i++) { 455 RenderNode displayList = mTextRenderNodes[i] != null 456 ? mTextRenderNodes[i].renderNode : null; 457 if (displayList != null && displayList.isValid()) { 458 displayList.discardDisplayList(); 459 } 460 } 461 } 462 } 463 464 private void showError() { 465 if (mTextView.getWindowToken() == null) { 466 mShowErrorAfterAttach = true; 467 return; 468 } 469 470 if (mErrorPopup == null) { 471 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 472 final TextView err = (TextView) inflater.inflate( 473 com.android.internal.R.layout.textview_hint, null); 474 475 final float scale = mTextView.getResources().getDisplayMetrics().density; 476 mErrorPopup = 477 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 478 mErrorPopup.setFocusable(false); 479 // The user is entering text, so the input method is needed. We 480 // don't want the popup to be displayed on top of it. 481 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 482 } 483 484 TextView tv = (TextView) mErrorPopup.getContentView(); 485 chooseSize(mErrorPopup, mError, tv); 486 tv.setText(mError); 487 488 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 489 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 490 } 491 492 public void setError(CharSequence error, Drawable icon) { 493 mError = TextUtils.stringOrSpannedString(error); 494 mErrorWasChanged = true; 495 496 if (mError == null) { 497 setErrorIcon(null); 498 if (mErrorPopup != null) { 499 if (mErrorPopup.isShowing()) { 500 mErrorPopup.dismiss(); 501 } 502 503 mErrorPopup = null; 504 } 505 mShowErrorAfterAttach = false; 506 } else { 507 setErrorIcon(icon); 508 if (mTextView.isFocused()) { 509 showError(); 510 } 511 } 512 } 513 514 private void setErrorIcon(Drawable icon) { 515 Drawables dr = mTextView.mDrawables; 516 if (dr == null) { 517 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 518 } 519 dr.setErrorDrawable(icon, mTextView); 520 521 mTextView.resetResolvedDrawables(); 522 mTextView.invalidate(); 523 mTextView.requestLayout(); 524 } 525 526 private void hideError() { 527 if (mErrorPopup != null) { 528 if (mErrorPopup.isShowing()) { 529 mErrorPopup.dismiss(); 530 } 531 } 532 533 mShowErrorAfterAttach = false; 534 } 535 536 /** 537 * Returns the X offset to make the pointy top of the error point 538 * at the middle of the error icon. 539 */ 540 private int getErrorX() { 541 /* 542 * The "25" is the distance between the point and the right edge 543 * of the background 544 */ 545 final float scale = mTextView.getResources().getDisplayMetrics().density; 546 547 final Drawables dr = mTextView.mDrawables; 548 549 final int layoutDirection = mTextView.getLayoutDirection(); 550 int errorX; 551 int offset; 552 switch (layoutDirection) { 553 default: 554 case View.LAYOUT_DIRECTION_LTR: 555 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 556 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 557 - mTextView.getPaddingRight() + offset; 558 break; 559 case View.LAYOUT_DIRECTION_RTL: 560 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 561 errorX = mTextView.getPaddingLeft() + offset; 562 break; 563 } 564 return errorX; 565 } 566 567 /** 568 * Returns the Y offset to make the pointy top of the error point 569 * at the bottom of the error icon. 570 */ 571 private int getErrorY() { 572 /* 573 * Compound, not extended, because the icon is not clipped 574 * if the text height is smaller. 575 */ 576 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 577 int vspace = mTextView.getBottom() - mTextView.getTop() 578 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 579 580 final Drawables dr = mTextView.mDrawables; 581 582 final int layoutDirection = mTextView.getLayoutDirection(); 583 int height; 584 switch (layoutDirection) { 585 default: 586 case View.LAYOUT_DIRECTION_LTR: 587 height = (dr != null ? dr.mDrawableHeightRight : 0); 588 break; 589 case View.LAYOUT_DIRECTION_RTL: 590 height = (dr != null ? dr.mDrawableHeightLeft : 0); 591 break; 592 } 593 594 int icontop = compoundPaddingTop + (vspace - height) / 2; 595 596 /* 597 * The "2" is the distance between the point and the top edge 598 * of the background. 599 */ 600 final float scale = mTextView.getResources().getDisplayMetrics().density; 601 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 602 } 603 604 void createInputContentTypeIfNeeded() { 605 if (mInputContentType == null) { 606 mInputContentType = new InputContentType(); 607 } 608 } 609 610 void createInputMethodStateIfNeeded() { 611 if (mInputMethodState == null) { 612 mInputMethodState = new InputMethodState(); 613 } 614 } 615 616 boolean isCursorVisible() { 617 // The default value is true, even when there is no associated Editor 618 return mCursorVisible && mTextView.isTextEditable(); 619 } 620 621 void prepareCursorControllers() { 622 boolean windowSupportsHandles = false; 623 624 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 625 if (params instanceof WindowManager.LayoutParams) { 626 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 627 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 628 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 629 } 630 631 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 632 mInsertionControllerEnabled = enabled && isCursorVisible(); 633 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 634 635 if (!mInsertionControllerEnabled) { 636 hideInsertionPointCursorController(); 637 if (mInsertionPointCursorController != null) { 638 mInsertionPointCursorController.onDetached(); 639 mInsertionPointCursorController = null; 640 } 641 } 642 643 if (!mSelectionControllerEnabled) { 644 stopTextActionMode(); 645 if (mSelectionModifierCursorController != null) { 646 mSelectionModifierCursorController.onDetached(); 647 mSelectionModifierCursorController = null; 648 } 649 } 650 } 651 652 void hideInsertionPointCursorController() { 653 if (mInsertionPointCursorController != null) { 654 mInsertionPointCursorController.hide(); 655 } 656 } 657 658 /** 659 * Hides the insertion and span controllers. 660 */ 661 void hideCursorAndSpanControllers() { 662 hideCursorControllers(); 663 hideSpanControllers(); 664 } 665 666 private void hideSpanControllers() { 667 if (mSpanController != null) { 668 mSpanController.hide(); 669 } 670 } 671 672 private void hideCursorControllers() { 673 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 674 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 675 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 676 // to distinguish one from the other. 677 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 678 || !mSuggestionsPopupWindow.isShowingUp())) { 679 // Should be done before hide insertion point controller since it triggers a show of it 680 mSuggestionsPopupWindow.hide(); 681 } 682 hideInsertionPointCursorController(); 683 } 684 685 /** 686 * Create new SpellCheckSpans on the modified region. 687 */ 688 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 689 // Remove spans whose adjacent characters are text not punctuation 690 mTextView.removeAdjacentSuggestionSpans(start); 691 mTextView.removeAdjacentSuggestionSpans(end); 692 693 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 694 && !(mTextView.isInExtractedMode())) { 695 if (mSpellChecker == null && createSpellChecker) { 696 mSpellChecker = new SpellChecker(mTextView); 697 } 698 if (mSpellChecker != null) { 699 mSpellChecker.spellCheck(start, end); 700 } 701 } 702 } 703 704 void onScreenStateChanged(int screenState) { 705 switch (screenState) { 706 case View.SCREEN_STATE_ON: 707 resumeBlink(); 708 break; 709 case View.SCREEN_STATE_OFF: 710 suspendBlink(); 711 break; 712 } 713 } 714 715 private void suspendBlink() { 716 if (mBlink != null) { 717 mBlink.cancel(); 718 } 719 } 720 721 private void resumeBlink() { 722 if (mBlink != null) { 723 mBlink.uncancel(); 724 makeBlink(); 725 } 726 } 727 728 void adjustInputType(boolean password, boolean passwordInputType, 729 boolean webPasswordInputType, boolean numberPasswordInputType) { 730 // mInputType has been set from inputType, possibly modified by mInputMethod. 731 // Specialize mInputType to [web]password if we have a text class and the original input 732 // type was a password. 733 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 734 if (password || passwordInputType) { 735 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 736 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 737 } 738 if (webPasswordInputType) { 739 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 740 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 741 } 742 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 743 if (numberPasswordInputType) { 744 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 745 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 746 } 747 } 748 } 749 750 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 751 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 752 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 753 754 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 755 com.android.internal.R.dimen.textview_error_popup_default_width); 756 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 757 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 758 float max = 0; 759 for (int i = 0; i < l.getLineCount(); i++) { 760 max = Math.max(max, l.getLineWidth(i)); 761 } 762 763 /* 764 * Now set the popup size to be big enough for the text plus the border capped 765 * to DEFAULT_MAX_POPUP_WIDTH 766 */ 767 pop.setWidth(wid + (int) Math.ceil(max)); 768 pop.setHeight(ht + l.getHeight()); 769 } 770 771 void setFrame() { 772 if (mErrorPopup != null) { 773 TextView tv = (TextView) mErrorPopup.getContentView(); 774 chooseSize(mErrorPopup, mError, tv); 775 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 776 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 777 } 778 } 779 780 private int getWordStart(int offset) { 781 // FIXME - For this and similar methods we're not doing anything to check if there's 782 // a LocaleSpan in the text, this may be something we should try handling or checking for. 783 int retOffset = getWordIteratorWithText().prevBoundary(offset); 784 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 785 // On punctuation boundary or within group of punctuation, find punctuation start. 786 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 787 } else { 788 // Not on a punctuation boundary, find the word start. 789 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 790 } 791 if (retOffset == BreakIterator.DONE) { 792 return offset; 793 } 794 return retOffset; 795 } 796 797 private int getWordEnd(int offset) { 798 int retOffset = getWordIteratorWithText().nextBoundary(offset); 799 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 800 // On punctuation boundary or within group of punctuation, find punctuation end. 801 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 802 } else { 803 // Not on a punctuation boundary, find the word end. 804 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 805 } 806 if (retOffset == BreakIterator.DONE) { 807 return offset; 808 } 809 return retOffset; 810 } 811 812 private boolean needsToSelectAllToSelectWordOrParagraph() { 813 if (mTextView.hasPasswordTransformationMethod()) { 814 // Always select all on a password field. 815 // Cut/copy menu entries are not available for passwords, but being able to select all 816 // is however useful to delete or paste to replace the entire content. 817 return true; 818 } 819 820 int inputType = mTextView.getInputType(); 821 int klass = inputType & InputType.TYPE_MASK_CLASS; 822 int variation = inputType & InputType.TYPE_MASK_VARIATION; 823 824 // Specific text field types: select the entire text for these 825 if (klass == InputType.TYPE_CLASS_NUMBER 826 || klass == InputType.TYPE_CLASS_PHONE 827 || klass == InputType.TYPE_CLASS_DATETIME 828 || variation == InputType.TYPE_TEXT_VARIATION_URI 829 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 830 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 831 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 832 return true; 833 } 834 return false; 835 } 836 837 /** 838 * Adjusts selection to the word under last touch offset. Return true if the operation was 839 * successfully performed. 840 */ 841 private boolean selectCurrentWord() { 842 if (!mTextView.canSelectText()) { 843 return false; 844 } 845 846 if (needsToSelectAllToSelectWordOrParagraph()) { 847 return mTextView.selectAllText(); 848 } 849 850 long lastTouchOffsets = getLastTouchOffsets(); 851 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 852 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 853 854 // Safety check in case standard touch event handling has been bypassed 855 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 856 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 857 858 int selectionStart, selectionEnd; 859 860 // If a URLSpan (web address, email, phone...) is found at that position, select it. 861 URLSpan[] urlSpans = 862 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 863 if (urlSpans.length >= 1) { 864 URLSpan urlSpan = urlSpans[0]; 865 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 866 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 867 } else { 868 // FIXME - We should check if there's a LocaleSpan in the text, this may be 869 // something we should try handling or checking for. 870 final WordIterator wordIterator = getWordIterator(); 871 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 872 873 selectionStart = wordIterator.getBeginning(minOffset); 874 selectionEnd = wordIterator.getEnd(maxOffset); 875 876 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 877 || selectionStart == selectionEnd) { 878 // Possible when the word iterator does not properly handle the text's language 879 long range = getCharClusterRange(minOffset); 880 selectionStart = TextUtils.unpackRangeStartFromLong(range); 881 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 882 } 883 } 884 885 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 886 return selectionEnd > selectionStart; 887 } 888 889 /** 890 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 891 * successfully performed. 892 */ 893 private boolean selectCurrentParagraph() { 894 if (!mTextView.canSelectText()) { 895 return false; 896 } 897 898 if (needsToSelectAllToSelectWordOrParagraph()) { 899 return mTextView.selectAllText(); 900 } 901 902 long lastTouchOffsets = getLastTouchOffsets(); 903 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 904 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 905 906 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 907 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 908 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 909 if (start < end) { 910 Selection.setSelection((Spannable) mTextView.getText(), start, end); 911 return true; 912 } 913 return false; 914 } 915 916 /** 917 * Get the minimum range of paragraphs that contains startOffset and endOffset. 918 */ 919 private long getParagraphsRange(int startOffset, int endOffset) { 920 final Layout layout = mTextView.getLayout(); 921 if (layout == null) { 922 return TextUtils.packRangeInLong(-1, -1); 923 } 924 final CharSequence text = mTextView.getText(); 925 int minLine = layout.getLineForOffset(startOffset); 926 // Search paragraph start. 927 while (minLine > 0) { 928 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 929 if (text.charAt(prevLineEndOffset - 1) == '\n') { 930 break; 931 } 932 minLine--; 933 } 934 int maxLine = layout.getLineForOffset(endOffset); 935 // Search paragraph end. 936 while (maxLine < layout.getLineCount() - 1) { 937 final int lineEndOffset = layout.getLineEnd(maxLine); 938 if (text.charAt(lineEndOffset - 1) == '\n') { 939 break; 940 } 941 maxLine++; 942 } 943 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 944 } 945 946 void onLocaleChanged() { 947 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 948 // proper new locale 949 mWordIterator = null; 950 mWordIteratorWithText = null; 951 } 952 953 public WordIterator getWordIterator() { 954 if (mWordIterator == null) { 955 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 956 } 957 return mWordIterator; 958 } 959 960 private WordIterator getWordIteratorWithText() { 961 if (mWordIteratorWithText == null) { 962 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 963 mUpdateWordIteratorText = true; 964 } 965 if (mUpdateWordIteratorText) { 966 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 967 // to the user's selection is needed. A possible solution would be to 968 // copy some number N of characters near the selection and then when the 969 // user approaches N then we'd do another copy of the next N characters. 970 CharSequence text = mTextView.getText(); 971 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 972 mUpdateWordIteratorText = false; 973 } 974 return mWordIteratorWithText; 975 } 976 977 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 978 final Layout layout = mTextView.getLayout(); 979 if (layout == null) return offset; 980 return findAfterGivenOffset == layout.isRtlCharAt(offset) 981 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 982 } 983 984 private long getCharClusterRange(int offset) { 985 final int textLength = mTextView.getText().length(); 986 if (offset < textLength) { 987 final int clusterEndOffset = getNextCursorOffset(offset, true); 988 return TextUtils.packRangeInLong( 989 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 990 } 991 if (offset - 1 >= 0) { 992 final int clusterStartOffset = getNextCursorOffset(offset, false); 993 return TextUtils.packRangeInLong(clusterStartOffset, 994 getNextCursorOffset(clusterStartOffset, true)); 995 } 996 return TextUtils.packRangeInLong(offset, offset); 997 } 998 999 private boolean touchPositionIsInSelection() { 1000 int selectionStart = mTextView.getSelectionStart(); 1001 int selectionEnd = mTextView.getSelectionEnd(); 1002 1003 if (selectionStart == selectionEnd) { 1004 return false; 1005 } 1006 1007 if (selectionStart > selectionEnd) { 1008 int tmp = selectionStart; 1009 selectionStart = selectionEnd; 1010 selectionEnd = tmp; 1011 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1012 } 1013 1014 SelectionModifierCursorController selectionController = getSelectionController(); 1015 int minOffset = selectionController.getMinTouchOffset(); 1016 int maxOffset = selectionController.getMaxTouchOffset(); 1017 1018 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1019 } 1020 1021 private PositionListener getPositionListener() { 1022 if (mPositionListener == null) { 1023 mPositionListener = new PositionListener(); 1024 } 1025 return mPositionListener; 1026 } 1027 1028 private interface TextViewPositionListener { 1029 public void updatePosition(int parentPositionX, int parentPositionY, 1030 boolean parentPositionChanged, boolean parentScrolled); 1031 } 1032 1033 private boolean isOffsetVisible(int offset) { 1034 Layout layout = mTextView.getLayout(); 1035 if (layout == null) return false; 1036 1037 final int line = layout.getLineForOffset(offset); 1038 final int lineBottom = layout.getLineBottom(line); 1039 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1040 return mTextView.isPositionVisible( 1041 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1042 lineBottom + mTextView.viewportToContentVerticalOffset()); 1043 } 1044 1045 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1046 * in the view. Returns false when the position is in the empty space of left/right of text. 1047 */ 1048 private boolean isPositionOnText(float x, float y) { 1049 Layout layout = mTextView.getLayout(); 1050 if (layout == null) return false; 1051 1052 final int line = mTextView.getLineAtCoordinate(y); 1053 x = mTextView.convertToLocalHorizontalCoordinate(x); 1054 1055 if (x < layout.getLineLeft(line)) return false; 1056 if (x > layout.getLineRight(line)) return false; 1057 return true; 1058 } 1059 1060 private void startDragAndDrop() { 1061 // TODO: Fix drag and drop in full screen extracted mode. 1062 if (mTextView.isInExtractedMode()) { 1063 return; 1064 } 1065 final int start = mTextView.getSelectionStart(); 1066 final int end = mTextView.getSelectionEnd(); 1067 CharSequence selectedText = mTextView.getTransformedText(start, end); 1068 ClipData data = ClipData.newPlainText(null, selectedText); 1069 DragLocalState localState = new DragLocalState(mTextView, start, end); 1070 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1071 View.DRAG_FLAG_GLOBAL); 1072 stopTextActionMode(); 1073 if (hasSelectionController()) { 1074 getSelectionController().resetTouchOffsets(); 1075 } 1076 } 1077 1078 public boolean performLongClick(boolean handled) { 1079 // Long press in empty space moves cursor and starts the insertion action mode. 1080 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1081 && mInsertionControllerEnabled) { 1082 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1083 mLastDownPositionY); 1084 Selection.setSelection((Spannable) mTextView.getText(), offset); 1085 getInsertionController().show(); 1086 mIsInsertionActionModeStartPending = true; 1087 handled = true; 1088 MetricsLogger.action( 1089 mTextView.getContext(), 1090 MetricsEvent.TEXT_LONGPRESS, 1091 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1092 } 1093 1094 if (!handled && mTextActionMode != null) { 1095 if (touchPositionIsInSelection()) { 1096 startDragAndDrop(); 1097 MetricsLogger.action( 1098 mTextView.getContext(), 1099 MetricsEvent.TEXT_LONGPRESS, 1100 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1101 } else { 1102 stopTextActionMode(); 1103 selectCurrentWordAndStartDrag(); 1104 MetricsLogger.action( 1105 mTextView.getContext(), 1106 MetricsEvent.TEXT_LONGPRESS, 1107 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1108 } 1109 handled = true; 1110 } 1111 1112 // Start a new selection 1113 if (!handled) { 1114 handled = selectCurrentWordAndStartDrag(); 1115 if (handled) { 1116 MetricsLogger.action( 1117 mTextView.getContext(), 1118 MetricsEvent.TEXT_LONGPRESS, 1119 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1120 } 1121 } 1122 1123 return handled; 1124 } 1125 1126 private long getLastTouchOffsets() { 1127 SelectionModifierCursorController selectionController = getSelectionController(); 1128 final int minOffset = selectionController.getMinTouchOffset(); 1129 final int maxOffset = selectionController.getMaxTouchOffset(); 1130 return TextUtils.packRangeInLong(minOffset, maxOffset); 1131 } 1132 1133 void onFocusChanged(boolean focused, int direction) { 1134 mShowCursor = SystemClock.uptimeMillis(); 1135 ensureEndedBatchEdit(); 1136 1137 if (focused) { 1138 int selStart = mTextView.getSelectionStart(); 1139 int selEnd = mTextView.getSelectionEnd(); 1140 1141 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1142 // mode for these, unless there was a specific selection already started. 1143 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1144 && selEnd == mTextView.getText().length(); 1145 1146 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1147 && !isFocusHighlighted; 1148 1149 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1150 // If a tap was used to give focus to that view, move cursor at tap position. 1151 // Has to be done before onTakeFocus, which can be overloaded. 1152 final int lastTapPosition = getLastTapPosition(); 1153 if (lastTapPosition >= 0) { 1154 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1155 } 1156 1157 // Note this may have to be moved out of the Editor class 1158 MovementMethod mMovement = mTextView.getMovementMethod(); 1159 if (mMovement != null) { 1160 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1161 } 1162 1163 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1164 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1165 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1166 // This special case ensure that we keep current selection in that case. 1167 // It would be better to know why the DecorView does not have focus at that time. 1168 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1169 && selStart >= 0 && selEnd >= 0) { 1170 /* 1171 * Someone intentionally set the selection, so let them 1172 * do whatever it is that they wanted to do instead of 1173 * the default on-focus behavior. We reset the selection 1174 * here instead of just skipping the onTakeFocus() call 1175 * because some movement methods do something other than 1176 * just setting the selection in theirs and we still 1177 * need to go through that path. 1178 */ 1179 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1180 } 1181 1182 if (mSelectAllOnFocus) { 1183 mTextView.selectAllText(); 1184 } 1185 1186 mTouchFocusSelected = true; 1187 } 1188 1189 mFrozenWithFocus = false; 1190 mSelectionMoved = false; 1191 1192 if (mError != null) { 1193 showError(); 1194 } 1195 1196 makeBlink(); 1197 } else { 1198 if (mError != null) { 1199 hideError(); 1200 } 1201 // Don't leave us in the middle of a batch edit. 1202 mTextView.onEndBatchEdit(); 1203 1204 if (mTextView.isInExtractedMode()) { 1205 hideCursorAndSpanControllers(); 1206 stopTextActionModeWithPreservingSelection(); 1207 } else { 1208 hideCursorAndSpanControllers(); 1209 if (mTextView.isTemporarilyDetached()) { 1210 stopTextActionModeWithPreservingSelection(); 1211 } else { 1212 stopTextActionMode(); 1213 } 1214 downgradeEasyCorrectionSpans(); 1215 } 1216 // No need to create the controller 1217 if (mSelectionModifierCursorController != null) { 1218 mSelectionModifierCursorController.resetTouchOffsets(); 1219 } 1220 } 1221 } 1222 1223 /** 1224 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1225 * span. 1226 */ 1227 private void downgradeEasyCorrectionSpans() { 1228 CharSequence text = mTextView.getText(); 1229 if (text instanceof Spannable) { 1230 Spannable spannable = (Spannable) text; 1231 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1232 spannable.length(), SuggestionSpan.class); 1233 for (int i = 0; i < suggestionSpans.length; i++) { 1234 int flags = suggestionSpans[i].getFlags(); 1235 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1236 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1237 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1238 suggestionSpans[i].setFlags(flags); 1239 } 1240 } 1241 } 1242 } 1243 1244 void sendOnTextChanged(int start, int after) { 1245 updateSpellCheckSpans(start, start + after, false); 1246 1247 // Flip flag to indicate the word iterator needs to have the text reset. 1248 mUpdateWordIteratorText = true; 1249 1250 // Hide the controllers as soon as text is modified (typing, procedural...) 1251 // We do not hide the span controllers, since they can be added when a new text is 1252 // inserted into the text view (voice IME). 1253 hideCursorControllers(); 1254 // Reset drag accelerator. 1255 if (mSelectionModifierCursorController != null) { 1256 mSelectionModifierCursorController.resetTouchOffsets(); 1257 } 1258 stopTextActionMode(); 1259 } 1260 1261 private int getLastTapPosition() { 1262 // No need to create the controller at that point, no last tap position saved 1263 if (mSelectionModifierCursorController != null) { 1264 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1265 if (lastTapPosition >= 0) { 1266 // Safety check, should not be possible. 1267 if (lastTapPosition > mTextView.getText().length()) { 1268 lastTapPosition = mTextView.getText().length(); 1269 } 1270 return lastTapPosition; 1271 } 1272 } 1273 1274 return -1; 1275 } 1276 1277 void onWindowFocusChanged(boolean hasWindowFocus) { 1278 if (hasWindowFocus) { 1279 if (mBlink != null) { 1280 mBlink.uncancel(); 1281 makeBlink(); 1282 } 1283 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1284 refreshTextActionMode(); 1285 } 1286 } else { 1287 if (mBlink != null) { 1288 mBlink.cancel(); 1289 } 1290 if (mInputContentType != null) { 1291 mInputContentType.enterDown = false; 1292 } 1293 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1294 hideCursorAndSpanControllers(); 1295 stopTextActionModeWithPreservingSelection(); 1296 if (mSuggestionsPopupWindow != null) { 1297 mSuggestionsPopupWindow.onParentLostFocus(); 1298 } 1299 1300 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1301 ensureEndedBatchEdit(); 1302 } 1303 } 1304 1305 private void updateTapState(MotionEvent event) { 1306 final int action = event.getActionMasked(); 1307 if (action == MotionEvent.ACTION_DOWN) { 1308 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1309 // Detect double tap and triple click. 1310 if (((mTapState == TAP_STATE_FIRST_TAP) 1311 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1312 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1313 <= ViewConfiguration.getDoubleTapTimeout()) { 1314 if (mTapState == TAP_STATE_FIRST_TAP) { 1315 mTapState = TAP_STATE_DOUBLE_TAP; 1316 } else { 1317 mTapState = TAP_STATE_TRIPLE_CLICK; 1318 } 1319 } else { 1320 mTapState = TAP_STATE_FIRST_TAP; 1321 } 1322 } 1323 if (action == MotionEvent.ACTION_UP) { 1324 mLastTouchUpTime = SystemClock.uptimeMillis(); 1325 } 1326 } 1327 1328 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1329 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1330 return false; 1331 } 1332 final boolean primaryButtonStateChanged = 1333 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1334 final int action = event.getActionMasked(); 1335 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1336 && !primaryButtonStateChanged) { 1337 return true; 1338 } 1339 if (action == MotionEvent.ACTION_MOVE 1340 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1341 return true; 1342 } 1343 return false; 1344 } 1345 1346 void onTouchEvent(MotionEvent event) { 1347 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1348 mLastButtonState = event.getButtonState(); 1349 if (filterOutEvent) { 1350 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1351 mDiscardNextActionUp = true; 1352 } 1353 return; 1354 } 1355 updateTapState(event); 1356 updateFloatingToolbarVisibility(event); 1357 1358 if (hasSelectionController()) { 1359 getSelectionController().onTouchEvent(event); 1360 } 1361 1362 if (mShowSuggestionRunnable != null) { 1363 mTextView.removeCallbacks(mShowSuggestionRunnable); 1364 mShowSuggestionRunnable = null; 1365 } 1366 1367 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1368 mLastDownPositionX = event.getX(); 1369 mLastDownPositionY = event.getY(); 1370 1371 // Reset this state; it will be re-set if super.onTouchEvent 1372 // causes focus to move to the view. 1373 mTouchFocusSelected = false; 1374 mIgnoreActionUpEvent = false; 1375 } 1376 } 1377 1378 private void updateFloatingToolbarVisibility(MotionEvent event) { 1379 if (mTextActionMode != null) { 1380 switch (event.getActionMasked()) { 1381 case MotionEvent.ACTION_MOVE: 1382 hideFloatingToolbar(); 1383 break; 1384 case MotionEvent.ACTION_UP: // fall through 1385 case MotionEvent.ACTION_CANCEL: 1386 showFloatingToolbar(); 1387 } 1388 } 1389 } 1390 1391 private void hideFloatingToolbar() { 1392 if (mTextActionMode != null) { 1393 mTextView.removeCallbacks(mShowFloatingToolbar); 1394 mTextActionMode.hide(ActionMode.DEFAULT_HIDE_DURATION); 1395 } 1396 } 1397 1398 private void showFloatingToolbar() { 1399 if (mTextActionMode != null) { 1400 // Delay "show" so it doesn't interfere with click confirmations 1401 // or double-clicks that could "dismiss" the floating toolbar. 1402 int delay = ViewConfiguration.getDoubleTapTimeout(); 1403 mTextView.postDelayed(mShowFloatingToolbar, delay); 1404 } 1405 } 1406 1407 public void beginBatchEdit() { 1408 mInBatchEditControllers = true; 1409 final InputMethodState ims = mInputMethodState; 1410 if (ims != null) { 1411 int nesting = ++ims.mBatchEditNesting; 1412 if (nesting == 1) { 1413 ims.mCursorChanged = false; 1414 ims.mChangedDelta = 0; 1415 if (ims.mContentChanged) { 1416 // We already have a pending change from somewhere else, 1417 // so turn this into a full update. 1418 ims.mChangedStart = 0; 1419 ims.mChangedEnd = mTextView.getText().length(); 1420 } else { 1421 ims.mChangedStart = EXTRACT_UNKNOWN; 1422 ims.mChangedEnd = EXTRACT_UNKNOWN; 1423 ims.mContentChanged = false; 1424 } 1425 mUndoInputFilter.beginBatchEdit(); 1426 mTextView.onBeginBatchEdit(); 1427 } 1428 } 1429 } 1430 1431 public void endBatchEdit() { 1432 mInBatchEditControllers = false; 1433 final InputMethodState ims = mInputMethodState; 1434 if (ims != null) { 1435 int nesting = --ims.mBatchEditNesting; 1436 if (nesting == 0) { 1437 finishBatchEdit(ims); 1438 } 1439 } 1440 } 1441 1442 void ensureEndedBatchEdit() { 1443 final InputMethodState ims = mInputMethodState; 1444 if (ims != null && ims.mBatchEditNesting != 0) { 1445 ims.mBatchEditNesting = 0; 1446 finishBatchEdit(ims); 1447 } 1448 } 1449 1450 void finishBatchEdit(final InputMethodState ims) { 1451 mTextView.onEndBatchEdit(); 1452 mUndoInputFilter.endBatchEdit(); 1453 1454 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1455 mTextView.updateAfterEdit(); 1456 reportExtractedText(); 1457 } else if (ims.mCursorChanged) { 1458 // Cheesy way to get us to report the current cursor location. 1459 mTextView.invalidateCursor(); 1460 } 1461 // sendUpdateSelection knows to avoid sending if the selection did 1462 // not actually change. 1463 sendUpdateSelection(); 1464 1465 // Show drag handles if they were blocked by batch edit mode. 1466 if (mTextActionMode != null) { 1467 final CursorController cursorController = mTextView.hasSelection() 1468 ? getSelectionController() : getInsertionController(); 1469 if (cursorController != null && !cursorController.isActive() 1470 && !cursorController.isCursorBeingModified()) { 1471 cursorController.show(); 1472 } 1473 } 1474 } 1475 1476 static final int EXTRACT_NOTHING = -2; 1477 static final int EXTRACT_UNKNOWN = -1; 1478 1479 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1480 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1481 EXTRACT_UNKNOWN, outText); 1482 } 1483 1484 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1485 int partialStartOffset, int partialEndOffset, int delta, 1486 @Nullable ExtractedText outText) { 1487 if (request == null || outText == null) { 1488 return false; 1489 } 1490 1491 final CharSequence content = mTextView.getText(); 1492 if (content == null) { 1493 return false; 1494 } 1495 1496 if (partialStartOffset != EXTRACT_NOTHING) { 1497 final int N = content.length(); 1498 if (partialStartOffset < 0) { 1499 outText.partialStartOffset = outText.partialEndOffset = -1; 1500 partialStartOffset = 0; 1501 partialEndOffset = N; 1502 } else { 1503 // Now use the delta to determine the actual amount of text 1504 // we need. 1505 partialEndOffset += delta; 1506 // Adjust offsets to ensure we contain full spans. 1507 if (content instanceof Spanned) { 1508 Spanned spanned = (Spanned) content; 1509 Object[] spans = spanned.getSpans(partialStartOffset, 1510 partialEndOffset, ParcelableSpan.class); 1511 int i = spans.length; 1512 while (i > 0) { 1513 i--; 1514 int j = spanned.getSpanStart(spans[i]); 1515 if (j < partialStartOffset) partialStartOffset = j; 1516 j = spanned.getSpanEnd(spans[i]); 1517 if (j > partialEndOffset) partialEndOffset = j; 1518 } 1519 } 1520 outText.partialStartOffset = partialStartOffset; 1521 outText.partialEndOffset = partialEndOffset - delta; 1522 1523 if (partialStartOffset > N) { 1524 partialStartOffset = N; 1525 } else if (partialStartOffset < 0) { 1526 partialStartOffset = 0; 1527 } 1528 if (partialEndOffset > N) { 1529 partialEndOffset = N; 1530 } else if (partialEndOffset < 0) { 1531 partialEndOffset = 0; 1532 } 1533 } 1534 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1535 outText.text = content.subSequence(partialStartOffset, 1536 partialEndOffset); 1537 } else { 1538 outText.text = TextUtils.substring(content, partialStartOffset, 1539 partialEndOffset); 1540 } 1541 } else { 1542 outText.partialStartOffset = 0; 1543 outText.partialEndOffset = 0; 1544 outText.text = ""; 1545 } 1546 outText.flags = 0; 1547 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1548 outText.flags |= ExtractedText.FLAG_SELECTING; 1549 } 1550 if (mTextView.isSingleLine()) { 1551 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1552 } 1553 outText.startOffset = 0; 1554 outText.selectionStart = mTextView.getSelectionStart(); 1555 outText.selectionEnd = mTextView.getSelectionEnd(); 1556 return true; 1557 } 1558 1559 boolean reportExtractedText() { 1560 final Editor.InputMethodState ims = mInputMethodState; 1561 if (ims != null) { 1562 final boolean contentChanged = ims.mContentChanged; 1563 if (contentChanged || ims.mSelectionModeChanged) { 1564 ims.mContentChanged = false; 1565 ims.mSelectionModeChanged = false; 1566 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1567 if (req != null) { 1568 InputMethodManager imm = InputMethodManager.peekInstance(); 1569 if (imm != null) { 1570 if (TextView.DEBUG_EXTRACT) { 1571 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1572 + ims.mChangedStart 1573 + " end=" + ims.mChangedEnd 1574 + " delta=" + ims.mChangedDelta); 1575 } 1576 if (ims.mChangedStart < 0 && !contentChanged) { 1577 ims.mChangedStart = EXTRACT_NOTHING; 1578 } 1579 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1580 ims.mChangedDelta, ims.mExtractedText)) { 1581 if (TextView.DEBUG_EXTRACT) { 1582 Log.v(TextView.LOG_TAG, 1583 "Reporting extracted start=" 1584 + ims.mExtractedText.partialStartOffset 1585 + " end=" + ims.mExtractedText.partialEndOffset 1586 + ": " + ims.mExtractedText.text); 1587 } 1588 1589 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1590 ims.mChangedStart = EXTRACT_UNKNOWN; 1591 ims.mChangedEnd = EXTRACT_UNKNOWN; 1592 ims.mChangedDelta = 0; 1593 ims.mContentChanged = false; 1594 return true; 1595 } 1596 } 1597 } 1598 } 1599 } 1600 return false; 1601 } 1602 1603 private void sendUpdateSelection() { 1604 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1605 final InputMethodManager imm = InputMethodManager.peekInstance(); 1606 if (null != imm) { 1607 final int selectionStart = mTextView.getSelectionStart(); 1608 final int selectionEnd = mTextView.getSelectionEnd(); 1609 int candStart = -1; 1610 int candEnd = -1; 1611 if (mTextView.getText() instanceof Spannable) { 1612 final Spannable sp = (Spannable) mTextView.getText(); 1613 candStart = EditableInputConnection.getComposingSpanStart(sp); 1614 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1615 } 1616 // InputMethodManager#updateSelection skips sending the message if 1617 // none of the parameters have changed since the last time we called it. 1618 imm.updateSelection(mTextView, 1619 selectionStart, selectionEnd, candStart, candEnd); 1620 } 1621 } 1622 } 1623 1624 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1625 int cursorOffsetVertical) { 1626 final int selectionStart = mTextView.getSelectionStart(); 1627 final int selectionEnd = mTextView.getSelectionEnd(); 1628 1629 final InputMethodState ims = mInputMethodState; 1630 if (ims != null && ims.mBatchEditNesting == 0) { 1631 InputMethodManager imm = InputMethodManager.peekInstance(); 1632 if (imm != null) { 1633 if (imm.isActive(mTextView)) { 1634 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1635 // We are in extract mode and the content has changed 1636 // in some way... just report complete new text to the 1637 // input method. 1638 reportExtractedText(); 1639 } 1640 } 1641 } 1642 } 1643 1644 if (mCorrectionHighlighter != null) { 1645 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1646 } 1647 1648 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1649 drawCursor(canvas, cursorOffsetVertical); 1650 // Rely on the drawable entirely, do not draw the cursor line. 1651 // Has to be done after the IMM related code above which relies on the highlight. 1652 highlight = null; 1653 } 1654 1655 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1656 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1657 cursorOffsetVertical); 1658 } else { 1659 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1660 } 1661 } 1662 1663 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1664 Paint highlightPaint, int cursorOffsetVertical) { 1665 final long lineRange = layout.getLineRangeForDraw(canvas); 1666 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1667 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1668 if (lastLine < 0) return; 1669 1670 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1671 firstLine, lastLine); 1672 1673 if (layout instanceof DynamicLayout) { 1674 if (mTextRenderNodes == null) { 1675 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1676 } 1677 1678 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1679 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1680 int[] blockIndices = dynamicLayout.getBlockIndices(); 1681 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1682 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1683 1684 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1685 if (blockSet != null) { 1686 for (int i = 0; i < blockSet.size(); i++) { 1687 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1688 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1689 && mTextRenderNodes[blockIndex] != null) { 1690 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1691 } 1692 } 1693 } 1694 1695 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1696 if (startBlock < 0) { 1697 startBlock = -(startBlock + 1); 1698 } 1699 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1700 1701 int startIndexToFindAvailableRenderNode = 0; 1702 int lastIndex = numberOfBlocks; 1703 1704 for (int i = startBlock; i < numberOfBlocks; i++) { 1705 final int blockIndex = blockIndices[i]; 1706 if (i >= indexFirstChangedBlock 1707 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1708 && mTextRenderNodes[blockIndex] != null) { 1709 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1710 } 1711 if (blockEndLines[i] < firstLine) { 1712 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1713 // be redrawn after they get scrolled into drawing range. 1714 continue; 1715 } 1716 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1717 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1718 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1719 if (blockEndLines[i] >= lastLine) { 1720 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1721 break; 1722 } 1723 } 1724 if (blockSet != null) { 1725 for (int i = 0; i < blockSet.size(); i++) { 1726 final int block = blockSet.valueAt(i); 1727 final int blockIndex = dynamicLayout.getBlockIndex(block); 1728 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1729 || mTextRenderNodes[blockIndex] == null 1730 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1731 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1732 layout, highlight, highlightPaint, cursorOffsetVertical, 1733 blockEndLines, blockIndices, block, numberOfBlocks, 1734 startIndexToFindAvailableRenderNode); 1735 } 1736 } 1737 } 1738 1739 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1740 } else { 1741 // Boring layout is used for empty and hint text 1742 layout.drawText(canvas, firstLine, lastLine); 1743 } 1744 } 1745 1746 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1747 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1748 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1749 int startIndexToFindAvailableRenderNode) { 1750 final int blockEndLine = blockEndLines[blockInfoIndex]; 1751 int blockIndex = blockIndices[blockInfoIndex]; 1752 1753 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1754 if (blockIsInvalid) { 1755 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1756 startIndexToFindAvailableRenderNode); 1757 // Note how dynamic layout's internal block indices get updated from Editor 1758 blockIndices[blockInfoIndex] = blockIndex; 1759 if (mTextRenderNodes[blockIndex] != null) { 1760 mTextRenderNodes[blockIndex].isDirty = true; 1761 } 1762 startIndexToFindAvailableRenderNode = blockIndex + 1; 1763 } 1764 1765 if (mTextRenderNodes[blockIndex] == null) { 1766 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1767 } 1768 1769 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1770 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1771 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1772 final int blockBeginLine = blockInfoIndex == 0 ? 1773 0 : blockEndLines[blockInfoIndex - 1] + 1; 1774 final int top = layout.getLineTop(blockBeginLine); 1775 final int bottom = layout.getLineBottom(blockEndLine); 1776 int left = 0; 1777 int right = mTextView.getWidth(); 1778 if (mTextView.getHorizontallyScrolling()) { 1779 float min = Float.MAX_VALUE; 1780 float max = Float.MIN_VALUE; 1781 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1782 min = Math.min(min, layout.getLineLeft(line)); 1783 max = Math.max(max, layout.getLineRight(line)); 1784 } 1785 left = (int) min; 1786 right = (int) (max + 0.5f); 1787 } 1788 1789 // Rebuild display list if it is invalid 1790 if (blockDisplayListIsInvalid) { 1791 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1792 right - left, bottom - top); 1793 try { 1794 // drawText is always relative to TextView's origin, this translation 1795 // brings this range of text back to the top left corner of the viewport 1796 displayListCanvas.translate(-left, -top); 1797 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1798 mTextRenderNodes[blockIndex].isDirty = false; 1799 // No need to untranslate, previous context is popped after 1800 // drawDisplayList 1801 } finally { 1802 blockDisplayList.end(displayListCanvas); 1803 // Same as drawDisplayList below, handled by our TextView's parent 1804 blockDisplayList.setClipToBounds(false); 1805 } 1806 } 1807 1808 // Valid display list only needs to update its drawing location. 1809 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1810 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1811 } 1812 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1813 return startIndexToFindAvailableRenderNode; 1814 } 1815 1816 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1817 int searchStartIndex) { 1818 int length = mTextRenderNodes.length; 1819 for (int i = searchStartIndex; i < length; i++) { 1820 boolean blockIndexFound = false; 1821 for (int j = 0; j < numberOfBlocks; j++) { 1822 if (blockIndices[j] == i) { 1823 blockIndexFound = true; 1824 break; 1825 } 1826 } 1827 if (blockIndexFound) continue; 1828 return i; 1829 } 1830 1831 // No available index found, the pool has to grow 1832 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1833 return length; 1834 } 1835 1836 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1837 final boolean translate = cursorOffsetVertical != 0; 1838 if (translate) canvas.translate(0, cursorOffsetVertical); 1839 for (int i = 0; i < mCursorCount; i++) { 1840 mCursorDrawable[i].draw(canvas); 1841 } 1842 if (translate) canvas.translate(0, -cursorOffsetVertical); 1843 } 1844 1845 void invalidateHandlesAndActionMode() { 1846 if (mSelectionModifierCursorController != null) { 1847 mSelectionModifierCursorController.invalidateHandles(); 1848 } 1849 if (mInsertionPointCursorController != null) { 1850 mInsertionPointCursorController.invalidateHandle(); 1851 } 1852 if (mTextActionMode != null) { 1853 invalidateActionModeAsync(); 1854 } 1855 } 1856 1857 /** 1858 * Invalidates all the sub-display lists that overlap the specified character range 1859 */ 1860 void invalidateTextDisplayList(Layout layout, int start, int end) { 1861 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1862 final int firstLine = layout.getLineForOffset(start); 1863 final int lastLine = layout.getLineForOffset(end); 1864 1865 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1866 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1867 int[] blockIndices = dynamicLayout.getBlockIndices(); 1868 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1869 1870 int i = 0; 1871 // Skip the blocks before firstLine 1872 while (i < numberOfBlocks) { 1873 if (blockEndLines[i] >= firstLine) break; 1874 i++; 1875 } 1876 1877 // Invalidate all subsequent blocks until lastLine is passed 1878 while (i < numberOfBlocks) { 1879 final int blockIndex = blockIndices[i]; 1880 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1881 mTextRenderNodes[blockIndex].isDirty = true; 1882 } 1883 if (blockEndLines[i] >= lastLine) break; 1884 i++; 1885 } 1886 } 1887 } 1888 1889 void invalidateTextDisplayList() { 1890 if (mTextRenderNodes != null) { 1891 for (int i = 0; i < mTextRenderNodes.length; i++) { 1892 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1893 } 1894 } 1895 } 1896 1897 void updateCursorsPositions() { 1898 if (mTextView.mCursorDrawableRes == 0) { 1899 mCursorCount = 0; 1900 return; 1901 } 1902 1903 Layout layout = mTextView.getLayout(); 1904 final int offset = mTextView.getSelectionStart(); 1905 final int line = layout.getLineForOffset(offset); 1906 final int top = layout.getLineTop(line); 1907 final int bottom = layout.getLineTop(line + 1); 1908 1909 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1910 1911 int middle = bottom; 1912 if (mCursorCount == 2) { 1913 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1914 middle = (top + bottom) >> 1; 1915 } 1916 1917 boolean clamped = layout.shouldClampCursor(line); 1918 updateCursorPosition(0, top, middle, layout.getPrimaryHorizontal(offset, clamped, true)); 1919 1920 if (mCursorCount == 2) { 1921 updateCursorPosition(1, middle, bottom, 1922 layout.getSecondaryHorizontal(offset, clamped, true)); 1923 } 1924 } 1925 1926 void refreshTextActionMode() { 1927 if (extractedTextModeWillBeStarted()) { 1928 mRestartActionModeOnNextRefresh = false; 1929 return; 1930 } 1931 final boolean hasSelection = mTextView.hasSelection(); 1932 final SelectionModifierCursorController selectionController = getSelectionController(); 1933 final InsertionPointCursorController insertionController = getInsertionController(); 1934 if ((selectionController != null && selectionController.isCursorBeingModified()) 1935 || (insertionController != null && insertionController.isCursorBeingModified())) { 1936 // ActionMode should be managed by the currently active cursor controller. 1937 mRestartActionModeOnNextRefresh = false; 1938 return; 1939 } 1940 if (hasSelection) { 1941 hideInsertionPointCursorController(); 1942 if (mTextActionMode == null) { 1943 if (mRestartActionModeOnNextRefresh) { 1944 // To avoid distraction, newly start action mode only when selection action 1945 // mode is being restarted. 1946 startSelectionActionMode(); 1947 } 1948 } else if (selectionController == null || !selectionController.isActive()) { 1949 // Insertion action mode is active. Avoid dismissing the selection. 1950 stopTextActionModeWithPreservingSelection(); 1951 startSelectionActionMode(); 1952 } else { 1953 mTextActionMode.invalidateContentRect(); 1954 } 1955 } else { 1956 // Insertion action mode is started only when insertion controller is explicitly 1957 // activated. 1958 if (insertionController == null || !insertionController.isActive()) { 1959 stopTextActionMode(); 1960 } else if (mTextActionMode != null) { 1961 mTextActionMode.invalidateContentRect(); 1962 } 1963 } 1964 mRestartActionModeOnNextRefresh = false; 1965 } 1966 1967 /** 1968 * Start an Insertion action mode. 1969 */ 1970 void startInsertionActionMode() { 1971 if (mInsertionActionModeRunnable != null) { 1972 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1973 } 1974 if (extractedTextModeWillBeStarted()) { 1975 return; 1976 } 1977 stopTextActionMode(); 1978 1979 ActionMode.Callback actionModeCallback = 1980 new TextActionModeCallback(false /* hasSelection */); 1981 mTextActionMode = mTextView.startActionMode( 1982 actionModeCallback, ActionMode.TYPE_FLOATING); 1983 if (mTextActionMode != null && getInsertionController() != null) { 1984 getInsertionController().show(); 1985 } 1986 } 1987 1988 @NonNull 1989 TextView getTextView() { 1990 return mTextView; 1991 } 1992 1993 @Nullable 1994 ActionMode getTextActionMode() { 1995 return mTextActionMode; 1996 } 1997 1998 void setRestartActionModeOnNextRefresh(boolean value) { 1999 mRestartActionModeOnNextRefresh = value; 2000 } 2001 2002 /** 2003 * Asynchronously starts a selection action mode using the TextClassifier. 2004 */ 2005 void startSelectionActionModeAsync() { 2006 getSelectionActionModeHelper().startActionModeAsync(); 2007 } 2008 2009 /** 2010 * Synchronously starts a selection action mode without the TextClassifier. 2011 */ 2012 void startSelectionActionMode() { 2013 getSelectionActionModeHelper().startActionMode(); 2014 } 2015 2016 /** 2017 * Asynchronously invalidates an action mode using the TextClassifier. 2018 */ 2019 private void invalidateActionModeAsync() { 2020 getSelectionActionModeHelper().invalidateActionModeAsync(); 2021 } 2022 2023 private SelectionActionModeHelper getSelectionActionModeHelper() { 2024 if (mSelectionActionModeHelper == null) { 2025 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2026 } 2027 return mSelectionActionModeHelper; 2028 } 2029 2030 /** 2031 * If the TextView allows text selection, selects the current word when no existing selection 2032 * was available and starts a drag. 2033 * 2034 * @return true if the drag was started. 2035 */ 2036 private boolean selectCurrentWordAndStartDrag() { 2037 if (mInsertionActionModeRunnable != null) { 2038 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2039 } 2040 if (extractedTextModeWillBeStarted()) { 2041 return false; 2042 } 2043 if (!checkField()) { 2044 return false; 2045 } 2046 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2047 // No selection and cannot select a word. 2048 return false; 2049 } 2050 stopTextActionModeWithPreservingSelection(); 2051 getSelectionController().enterDrag( 2052 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2053 return true; 2054 } 2055 2056 /** 2057 * Checks whether a selection can be performed on the current TextView. 2058 * 2059 * @return true if a selection can be performed 2060 */ 2061 boolean checkField() { 2062 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2063 Log.w(TextView.LOG_TAG, 2064 "TextView does not support text selection. Selection cancelled."); 2065 return false; 2066 } 2067 return true; 2068 } 2069 2070 boolean startSelectionActionModeInternal() { 2071 if (extractedTextModeWillBeStarted()) { 2072 return false; 2073 } 2074 if (mTextActionMode != null) { 2075 // Text action mode is already started 2076 invalidateActionModeAsync(); 2077 return false; 2078 } 2079 2080 if (!checkField() || !mTextView.hasSelection()) { 2081 return false; 2082 } 2083 2084 ActionMode.Callback actionModeCallback = 2085 new TextActionModeCallback(true /* hasSelection */); 2086 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2087 2088 final boolean selectionStarted = mTextActionMode != null; 2089 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2090 // Show the IME to be able to replace text, except when selecting non editable text. 2091 final InputMethodManager imm = InputMethodManager.peekInstance(); 2092 if (imm != null) { 2093 imm.showSoftInput(mTextView, 0, null); 2094 } 2095 } 2096 return selectionStarted; 2097 } 2098 2099 private boolean extractedTextModeWillBeStarted() { 2100 if (!(mTextView.isInExtractedMode())) { 2101 final InputMethodManager imm = InputMethodManager.peekInstance(); 2102 return imm != null && imm.isFullscreenMode(); 2103 } 2104 return false; 2105 } 2106 2107 /** 2108 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2109 * the current cursor position or selection range. This method is consistent with the 2110 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2111 */ 2112 private boolean shouldOfferToShowSuggestions() { 2113 CharSequence text = mTextView.getText(); 2114 if (!(text instanceof Spannable)) return false; 2115 2116 final Spannable spannable = (Spannable) text; 2117 final int selectionStart = mTextView.getSelectionStart(); 2118 final int selectionEnd = mTextView.getSelectionEnd(); 2119 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2120 SuggestionSpan.class); 2121 if (suggestionSpans.length == 0) { 2122 return false; 2123 } 2124 if (selectionStart == selectionEnd) { 2125 // Spans overlap the cursor. 2126 for (int i = 0; i < suggestionSpans.length; i++) { 2127 if (suggestionSpans[i].getSuggestions().length > 0) { 2128 return true; 2129 } 2130 } 2131 return false; 2132 } 2133 int minSpanStart = mTextView.getText().length(); 2134 int maxSpanEnd = 0; 2135 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2136 int unionOfSpansCoveringSelectionStartEnd = 0; 2137 boolean hasValidSuggestions = false; 2138 for (int i = 0; i < suggestionSpans.length; i++) { 2139 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2140 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2141 minSpanStart = Math.min(minSpanStart, spanStart); 2142 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2143 if (selectionStart < spanStart || selectionStart > spanEnd) { 2144 // The span doesn't cover the current selection start point. 2145 continue; 2146 } 2147 hasValidSuggestions = 2148 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2149 unionOfSpansCoveringSelectionStartStart = 2150 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2151 unionOfSpansCoveringSelectionStartEnd = 2152 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2153 } 2154 if (!hasValidSuggestions) { 2155 return false; 2156 } 2157 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2158 // No spans cover the selection start point. 2159 return false; 2160 } 2161 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2162 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2163 // There is a span that is not covered by the union. In this case, we soouldn't offer 2164 // to show suggestions as it's confusing. 2165 return false; 2166 } 2167 return true; 2168 } 2169 2170 /** 2171 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2172 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2173 */ 2174 private boolean isCursorInsideEasyCorrectionSpan() { 2175 Spannable spannable = (Spannable) mTextView.getText(); 2176 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2177 mTextView.getSelectionEnd(), SuggestionSpan.class); 2178 for (int i = 0; i < suggestionSpans.length; i++) { 2179 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2180 return true; 2181 } 2182 } 2183 return false; 2184 } 2185 2186 void onTouchUpEvent(MotionEvent event) { 2187 if (getSelectionActionModeHelper().resetOriginalSelection( 2188 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2189 return; 2190 } 2191 2192 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2193 hideCursorAndSpanControllers(); 2194 stopTextActionMode(); 2195 CharSequence text = mTextView.getText(); 2196 if (!selectAllGotFocus && text.length() > 0) { 2197 // Move cursor 2198 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2199 Selection.setSelection((Spannable) text, offset); 2200 if (mSpellChecker != null) { 2201 // When the cursor moves, the word that was typed may need spell check 2202 mSpellChecker.onSelectionChanged(); 2203 } 2204 2205 if (!extractedTextModeWillBeStarted()) { 2206 if (isCursorInsideEasyCorrectionSpan()) { 2207 // Cancel the single tap delayed runnable. 2208 if (mInsertionActionModeRunnable != null) { 2209 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2210 } 2211 2212 mShowSuggestionRunnable = new Runnable() { 2213 public void run() { 2214 replace(); 2215 } 2216 }; 2217 // removeCallbacks is performed on every touch 2218 mTextView.postDelayed(mShowSuggestionRunnable, 2219 ViewConfiguration.getDoubleTapTimeout()); 2220 } else if (hasInsertionController()) { 2221 getInsertionController().show(); 2222 } 2223 } 2224 } 2225 } 2226 2227 protected void stopTextActionMode() { 2228 if (mTextActionMode != null) { 2229 // This will hide the mSelectionModifierCursorController 2230 mTextActionMode.finish(); 2231 } 2232 } 2233 2234 private void stopTextActionModeWithPreservingSelection() { 2235 if (mTextActionMode != null) { 2236 mRestartActionModeOnNextRefresh = true; 2237 } 2238 mPreserveSelection = true; 2239 stopTextActionMode(); 2240 mPreserveSelection = false; 2241 } 2242 2243 /** 2244 * @return True if this view supports insertion handles. 2245 */ 2246 boolean hasInsertionController() { 2247 return mInsertionControllerEnabled; 2248 } 2249 2250 /** 2251 * @return True if this view supports selection handles. 2252 */ 2253 boolean hasSelectionController() { 2254 return mSelectionControllerEnabled; 2255 } 2256 2257 private InsertionPointCursorController getInsertionController() { 2258 if (!mInsertionControllerEnabled) { 2259 return null; 2260 } 2261 2262 if (mInsertionPointCursorController == null) { 2263 mInsertionPointCursorController = new InsertionPointCursorController(); 2264 2265 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2266 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2267 } 2268 2269 return mInsertionPointCursorController; 2270 } 2271 2272 @Nullable 2273 SelectionModifierCursorController getSelectionController() { 2274 if (!mSelectionControllerEnabled) { 2275 return null; 2276 } 2277 2278 if (mSelectionModifierCursorController == null) { 2279 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2280 2281 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2282 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2283 } 2284 2285 return mSelectionModifierCursorController; 2286 } 2287 2288 @VisibleForTesting 2289 public Drawable[] getCursorDrawable() { 2290 return mCursorDrawable; 2291 } 2292 2293 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2294 if (mCursorDrawable[cursorIndex] == null) { 2295 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2296 mTextView.mCursorDrawableRes); 2297 } 2298 final Drawable drawable = mCursorDrawable[cursorIndex]; 2299 final int left = clampHorizontalPosition(drawable, horizontal); 2300 final int width = drawable.getIntrinsicWidth(); 2301 drawable.setBounds(left, top - mTempRect.top, left + width, 2302 bottom + mTempRect.bottom); 2303 } 2304 2305 /** 2306 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2307 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2308 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2309 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2310 * of the view. 2311 * 2312 * @param drawable Drawable. Can be null. 2313 * @param horizontal Horizontal position for the drawable. 2314 * @return The clamped horizontal position for the drawable. 2315 */ 2316 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2317 horizontal = Math.max(0.5f, horizontal - 0.5f); 2318 if (mTempRect == null) mTempRect = new Rect(); 2319 2320 int drawableWidth = 0; 2321 if (drawable != null) { 2322 drawable.getPadding(mTempRect); 2323 drawableWidth = drawable.getIntrinsicWidth(); 2324 } else { 2325 mTempRect.setEmpty(); 2326 } 2327 2328 int scrollX = mTextView.getScrollX(); 2329 float horizontalDiff = horizontal - scrollX; 2330 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2331 - mTextView.getCompoundPaddingRight(); 2332 2333 final int left; 2334 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2335 // at the rightmost position 2336 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2337 } else if (Math.abs(horizontalDiff) <= 1f 2338 || (TextUtils.isEmpty(mTextView.getText()) 2339 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2340 && horizontal <= 1f)) { 2341 // at the leftmost position 2342 left = scrollX - mTempRect.left; 2343 } else { 2344 left = (int) horizontal - mTempRect.left; 2345 } 2346 return left; 2347 } 2348 2349 /** 2350 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2351 * a dictionary) from the current input method, provided by it calling 2352 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2353 * implementation flashes the background of the corrected word to provide feedback to the user. 2354 * 2355 * @param info The auto correct info about the text that was corrected. 2356 */ 2357 public void onCommitCorrection(CorrectionInfo info) { 2358 if (mCorrectionHighlighter == null) { 2359 mCorrectionHighlighter = new CorrectionHighlighter(); 2360 } else { 2361 mCorrectionHighlighter.invalidate(false); 2362 } 2363 2364 mCorrectionHighlighter.highlight(info); 2365 mUndoInputFilter.freezeLastEdit(); 2366 } 2367 2368 void onScrollChanged() { 2369 if (mPositionListener != null) { 2370 mPositionListener.onScrollChanged(); 2371 } 2372 if (mTextActionMode != null) { 2373 mTextActionMode.invalidateContentRect(); 2374 } 2375 } 2376 2377 /** 2378 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2379 */ 2380 private boolean shouldBlink() { 2381 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2382 2383 final int start = mTextView.getSelectionStart(); 2384 if (start < 0) return false; 2385 2386 final int end = mTextView.getSelectionEnd(); 2387 if (end < 0) return false; 2388 2389 return start == end; 2390 } 2391 2392 void makeBlink() { 2393 if (shouldBlink()) { 2394 mShowCursor = SystemClock.uptimeMillis(); 2395 if (mBlink == null) mBlink = new Blink(); 2396 mTextView.removeCallbacks(mBlink); 2397 mTextView.postDelayed(mBlink, BLINK); 2398 } else { 2399 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2400 } 2401 } 2402 2403 private class Blink implements Runnable { 2404 private boolean mCancelled; 2405 2406 public void run() { 2407 if (mCancelled) { 2408 return; 2409 } 2410 2411 mTextView.removeCallbacks(this); 2412 2413 if (shouldBlink()) { 2414 if (mTextView.getLayout() != null) { 2415 mTextView.invalidateCursorPath(); 2416 } 2417 2418 mTextView.postDelayed(this, BLINK); 2419 } 2420 } 2421 2422 void cancel() { 2423 if (!mCancelled) { 2424 mTextView.removeCallbacks(this); 2425 mCancelled = true; 2426 } 2427 } 2428 2429 void uncancel() { 2430 mCancelled = false; 2431 } 2432 } 2433 2434 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2435 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2436 com.android.internal.R.layout.text_drag_thumbnail, null); 2437 2438 if (shadowView == null) { 2439 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2440 } 2441 2442 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2443 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2444 end = TextUtils.unpackRangeEndFromLong(range); 2445 } 2446 final CharSequence text = mTextView.getTransformedText(start, end); 2447 shadowView.setText(text); 2448 shadowView.setTextColor(mTextView.getTextColors()); 2449 2450 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2451 shadowView.setGravity(Gravity.CENTER); 2452 2453 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2454 ViewGroup.LayoutParams.WRAP_CONTENT)); 2455 2456 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2457 shadowView.measure(size, size); 2458 2459 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2460 shadowView.invalidate(); 2461 return new DragShadowBuilder(shadowView); 2462 } 2463 2464 private static class DragLocalState { 2465 public TextView sourceTextView; 2466 public int start, end; 2467 2468 public DragLocalState(TextView sourceTextView, int start, int end) { 2469 this.sourceTextView = sourceTextView; 2470 this.start = start; 2471 this.end = end; 2472 } 2473 } 2474 2475 void onDrop(DragEvent event) { 2476 SpannableStringBuilder content = new SpannableStringBuilder(); 2477 2478 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2479 if (permissions != null) { 2480 permissions.takeTransient(); 2481 } 2482 2483 try { 2484 ClipData clipData = event.getClipData(); 2485 final int itemCount = clipData.getItemCount(); 2486 for (int i = 0; i < itemCount; i++) { 2487 Item item = clipData.getItemAt(i); 2488 content.append(item.coerceToStyledText(mTextView.getContext())); 2489 } 2490 } finally { 2491 if (permissions != null) { 2492 permissions.release(); 2493 } 2494 } 2495 2496 mTextView.beginBatchEdit(); 2497 mUndoInputFilter.freezeLastEdit(); 2498 try { 2499 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2500 Object localState = event.getLocalState(); 2501 DragLocalState dragLocalState = null; 2502 if (localState instanceof DragLocalState) { 2503 dragLocalState = (DragLocalState) localState; 2504 } 2505 boolean dragDropIntoItself = dragLocalState != null 2506 && dragLocalState.sourceTextView == mTextView; 2507 2508 if (dragDropIntoItself) { 2509 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2510 // A drop inside the original selection discards the drop. 2511 return; 2512 } 2513 } 2514 2515 final int originalLength = mTextView.getText().length(); 2516 int min = offset; 2517 int max = offset; 2518 2519 Selection.setSelection((Spannable) mTextView.getText(), max); 2520 mTextView.replaceText_internal(min, max, content); 2521 2522 if (dragDropIntoItself) { 2523 int dragSourceStart = dragLocalState.start; 2524 int dragSourceEnd = dragLocalState.end; 2525 if (max <= dragSourceStart) { 2526 // Inserting text before selection has shifted positions 2527 final int shift = mTextView.getText().length() - originalLength; 2528 dragSourceStart += shift; 2529 dragSourceEnd += shift; 2530 } 2531 2532 // Delete original selection 2533 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2534 2535 // Make sure we do not leave two adjacent spaces. 2536 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2537 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2538 if (nextCharIdx > prevCharIdx + 1) { 2539 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2540 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2541 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2542 } 2543 } 2544 } 2545 } finally { 2546 mTextView.endBatchEdit(); 2547 mUndoInputFilter.freezeLastEdit(); 2548 } 2549 } 2550 2551 public void addSpanWatchers(Spannable text) { 2552 final int textLength = text.length(); 2553 2554 if (mKeyListener != null) { 2555 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2556 } 2557 2558 if (mSpanController == null) { 2559 mSpanController = new SpanController(); 2560 } 2561 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2562 } 2563 2564 void setContextMenuAnchor(float x, float y) { 2565 mContextMenuAnchorX = x; 2566 mContextMenuAnchorY = y; 2567 } 2568 2569 void onCreateContextMenu(ContextMenu menu) { 2570 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2571 || Float.isNaN(mContextMenuAnchorY)) { 2572 return; 2573 } 2574 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2575 if (offset == -1) { 2576 return; 2577 } 2578 stopTextActionModeWithPreservingSelection(); 2579 final boolean isOnSelection = mTextView.hasSelection() 2580 && offset >= mTextView.getSelectionStart() && offset <= mTextView.getSelectionEnd(); 2581 if (!isOnSelection) { 2582 // Right clicked position is not on the selection. Remove the selection and move the 2583 // cursor to the right clicked position. 2584 Selection.setSelection((Spannable) mTextView.getText(), offset); 2585 stopTextActionMode(); 2586 } 2587 2588 if (shouldOfferToShowSuggestions()) { 2589 final SuggestionInfo[] suggestionInfoArray = 2590 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2591 for (int i = 0; i < suggestionInfoArray.length; i++) { 2592 suggestionInfoArray[i] = new SuggestionInfo(); 2593 } 2594 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2595 com.android.internal.R.string.replace); 2596 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2597 for (int i = 0; i < numItems; i++) { 2598 final SuggestionInfo info = suggestionInfoArray[i]; 2599 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2600 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2601 @Override 2602 public boolean onMenuItemClick(MenuItem item) { 2603 replaceWithSuggestion(info); 2604 return true; 2605 } 2606 }); 2607 } 2608 } 2609 2610 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2611 com.android.internal.R.string.undo) 2612 .setAlphabeticShortcut('z') 2613 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2614 .setEnabled(mTextView.canUndo()); 2615 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2616 com.android.internal.R.string.redo) 2617 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2618 .setEnabled(mTextView.canRedo()); 2619 2620 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2621 com.android.internal.R.string.cut) 2622 .setAlphabeticShortcut('x') 2623 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2624 .setEnabled(mTextView.canCut()); 2625 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2626 com.android.internal.R.string.copy) 2627 .setAlphabeticShortcut('c') 2628 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2629 .setEnabled(mTextView.canCopy()); 2630 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2631 com.android.internal.R.string.paste) 2632 .setAlphabeticShortcut('v') 2633 .setEnabled(mTextView.canPaste()) 2634 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2635 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2636 com.android.internal.R.string.paste_as_plain_text) 2637 .setEnabled(mTextView.canPaste()) 2638 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2639 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2640 com.android.internal.R.string.share) 2641 .setEnabled(mTextView.canShare()) 2642 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2643 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2644 com.android.internal.R.string.selectAll) 2645 .setAlphabeticShortcut('a') 2646 .setEnabled(mTextView.canSelectAllText()) 2647 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2648 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2649 com.android.internal.R.string.autofill) 2650 .setEnabled(mTextView.canRequestAutofill()) 2651 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2652 2653 mPreserveSelection = true; 2654 } 2655 2656 @Nullable 2657 private SuggestionSpan findEquivalentSuggestionSpan( 2658 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2659 final Editable editable = (Editable) mTextView.getText(); 2660 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2661 // Exactly same span is found. 2662 return suggestionSpanInfo.mSuggestionSpan; 2663 } 2664 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2665 // contents. 2666 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2667 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2668 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2669 final int start = editable.getSpanStart(suggestionSpan); 2670 if (start != suggestionSpanInfo.mSpanStart) { 2671 continue; 2672 } 2673 final int end = editable.getSpanEnd(suggestionSpan); 2674 if (end != suggestionSpanInfo.mSpanEnd) { 2675 continue; 2676 } 2677 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2678 return suggestionSpan; 2679 } 2680 } 2681 return null; 2682 } 2683 2684 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2685 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2686 suggestionInfo.mSuggestionSpanInfo); 2687 if (targetSuggestionSpan == null) { 2688 // Span has been removed 2689 return; 2690 } 2691 final Editable editable = (Editable) mTextView.getText(); 2692 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2693 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2694 if (spanStart < 0 || spanEnd <= spanStart) { 2695 // Span has been removed 2696 return; 2697 } 2698 2699 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2700 // SuggestionSpans are removed by replace: save them before 2701 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2702 SuggestionSpan.class); 2703 final int length = suggestionSpans.length; 2704 int[] suggestionSpansStarts = new int[length]; 2705 int[] suggestionSpansEnds = new int[length]; 2706 int[] suggestionSpansFlags = new int[length]; 2707 for (int i = 0; i < length; i++) { 2708 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2709 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2710 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2711 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2712 2713 // Remove potential misspelled flags 2714 int suggestionSpanFlags = suggestionSpan.getFlags(); 2715 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2716 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2717 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2718 suggestionSpan.setFlags(suggestionSpanFlags); 2719 } 2720 } 2721 2722 // Notify source IME of the suggestion pick. Do this before swapping texts. 2723 targetSuggestionSpan.notifySelection( 2724 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2725 2726 // Swap text content between actual text and Suggestion span 2727 final int suggestionStart = suggestionInfo.mSuggestionStart; 2728 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2729 final String suggestion = suggestionInfo.mText.subSequence( 2730 suggestionStart, suggestionEnd).toString(); 2731 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2732 2733 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2734 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2735 2736 // Restore previous SuggestionSpans 2737 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2738 for (int i = 0; i < length; i++) { 2739 // Only spans that include the modified region make sense after replacement 2740 // Spans partially included in the replaced region are removed, there is no 2741 // way to assign them a valid range after replacement 2742 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2743 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2744 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2745 } 2746 } 2747 // Move cursor at the end of the replaced word 2748 final int newCursorPosition = spanEnd + lengthDelta; 2749 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2750 } 2751 2752 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2753 new MenuItem.OnMenuItemClickListener() { 2754 @Override 2755 public boolean onMenuItemClick(MenuItem item) { 2756 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2757 return true; 2758 } 2759 return mTextView.onTextContextMenuItem(item.getItemId()); 2760 } 2761 }; 2762 2763 /** 2764 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2765 * pop-up should be displayed. 2766 * Also monitors {@link Selection} to call back to the attached input method. 2767 */ 2768 private class SpanController implements SpanWatcher { 2769 2770 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2771 2772 private EasyEditPopupWindow mPopupWindow; 2773 2774 private Runnable mHidePopup; 2775 2776 // This function is pure but inner classes can't have static functions 2777 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2778 final Object span) { 2779 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2780 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2781 } 2782 2783 @Override 2784 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2785 if (isNonIntermediateSelectionSpan(text, span)) { 2786 sendUpdateSelection(); 2787 } else if (span instanceof EasyEditSpan) { 2788 if (mPopupWindow == null) { 2789 mPopupWindow = new EasyEditPopupWindow(); 2790 mHidePopup = new Runnable() { 2791 @Override 2792 public void run() { 2793 hide(); 2794 } 2795 }; 2796 } 2797 2798 // Make sure there is only at most one EasyEditSpan in the text 2799 if (mPopupWindow.mEasyEditSpan != null) { 2800 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2801 } 2802 2803 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2804 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2805 @Override 2806 public void onDeleteClick(EasyEditSpan span) { 2807 Editable editable = (Editable) mTextView.getText(); 2808 int start = editable.getSpanStart(span); 2809 int end = editable.getSpanEnd(span); 2810 if (start >= 0 && end >= 0) { 2811 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2812 mTextView.deleteText_internal(start, end); 2813 } 2814 editable.removeSpan(span); 2815 } 2816 }); 2817 2818 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2819 // The window is not visible yet, ignore the text change. 2820 return; 2821 } 2822 2823 if (mTextView.getLayout() == null) { 2824 // The view has not been laid out yet, ignore the text change 2825 return; 2826 } 2827 2828 if (extractedTextModeWillBeStarted()) { 2829 // The input is in extract mode. Do not handle the easy edit in 2830 // the original TextView, as the ExtractEditText will do 2831 return; 2832 } 2833 2834 mPopupWindow.show(); 2835 mTextView.removeCallbacks(mHidePopup); 2836 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2837 } 2838 } 2839 2840 @Override 2841 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2842 if (isNonIntermediateSelectionSpan(text, span)) { 2843 sendUpdateSelection(); 2844 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2845 hide(); 2846 } 2847 } 2848 2849 @Override 2850 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2851 int newStart, int newEnd) { 2852 if (isNonIntermediateSelectionSpan(text, span)) { 2853 sendUpdateSelection(); 2854 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2855 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2856 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2857 text.removeSpan(easyEditSpan); 2858 } 2859 } 2860 2861 public void hide() { 2862 if (mPopupWindow != null) { 2863 mPopupWindow.hide(); 2864 mTextView.removeCallbacks(mHidePopup); 2865 } 2866 } 2867 2868 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2869 try { 2870 PendingIntent pendingIntent = span.getPendingIntent(); 2871 if (pendingIntent != null) { 2872 Intent intent = new Intent(); 2873 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2874 pendingIntent.send(mTextView.getContext(), 0, intent); 2875 } 2876 } catch (CanceledException e) { 2877 // This should not happen, as we should try to send the intent only once. 2878 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2879 } 2880 } 2881 } 2882 2883 /** 2884 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2885 */ 2886 private interface EasyEditDeleteListener { 2887 2888 /** 2889 * Clicks the delete pop-up. 2890 */ 2891 void onDeleteClick(EasyEditSpan span); 2892 } 2893 2894 /** 2895 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2896 * by {@link SpanController}. 2897 */ 2898 private class EasyEditPopupWindow extends PinnedPopupWindow 2899 implements OnClickListener { 2900 private static final int POPUP_TEXT_LAYOUT = 2901 com.android.internal.R.layout.text_edit_action_popup_text; 2902 private TextView mDeleteTextView; 2903 private EasyEditSpan mEasyEditSpan; 2904 private EasyEditDeleteListener mOnDeleteListener; 2905 2906 @Override 2907 protected void createPopupWindow() { 2908 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2909 com.android.internal.R.attr.textSelectHandleWindowStyle); 2910 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2911 mPopupWindow.setClippingEnabled(true); 2912 } 2913 2914 @Override 2915 protected void initContentView() { 2916 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2917 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2918 mContentView = linearLayout; 2919 mContentView.setBackgroundResource( 2920 com.android.internal.R.drawable.text_edit_side_paste_window); 2921 2922 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 2923 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2924 2925 LayoutParams wrapContent = new LayoutParams( 2926 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2927 2928 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2929 mDeleteTextView.setLayoutParams(wrapContent); 2930 mDeleteTextView.setText(com.android.internal.R.string.delete); 2931 mDeleteTextView.setOnClickListener(this); 2932 mContentView.addView(mDeleteTextView); 2933 } 2934 2935 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2936 mEasyEditSpan = easyEditSpan; 2937 } 2938 2939 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2940 mOnDeleteListener = listener; 2941 } 2942 2943 @Override 2944 public void onClick(View view) { 2945 if (view == mDeleteTextView 2946 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2947 && mOnDeleteListener != null) { 2948 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2949 } 2950 } 2951 2952 @Override 2953 public void hide() { 2954 if (mEasyEditSpan != null) { 2955 mEasyEditSpan.setDeleteEnabled(false); 2956 } 2957 mOnDeleteListener = null; 2958 super.hide(); 2959 } 2960 2961 @Override 2962 protected int getTextOffset() { 2963 // Place the pop-up at the end of the span 2964 Editable editable = (Editable) mTextView.getText(); 2965 return editable.getSpanEnd(mEasyEditSpan); 2966 } 2967 2968 @Override 2969 protected int getVerticalLocalPosition(int line) { 2970 return mTextView.getLayout().getLineBottom(line); 2971 } 2972 2973 @Override 2974 protected int clipVertically(int positionY) { 2975 // As we display the pop-up below the span, no vertical clipping is required. 2976 return positionY; 2977 } 2978 } 2979 2980 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2981 // 3 handles 2982 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2983 // 1 CursorAnchorInfoNotifier 2984 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2985 private TextViewPositionListener[] mPositionListeners = 2986 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2987 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2988 private boolean mPositionHasChanged = true; 2989 // Absolute position of the TextView with respect to its parent window 2990 private int mPositionX, mPositionY; 2991 private int mPositionXOnScreen, mPositionYOnScreen; 2992 private int mNumberOfListeners; 2993 private boolean mScrollHasChanged; 2994 final int[] mTempCoords = new int[2]; 2995 2996 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2997 if (mNumberOfListeners == 0) { 2998 updatePosition(); 2999 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3000 vto.addOnPreDrawListener(this); 3001 } 3002 3003 int emptySlotIndex = -1; 3004 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3005 TextViewPositionListener listener = mPositionListeners[i]; 3006 if (listener == positionListener) { 3007 return; 3008 } else if (emptySlotIndex < 0 && listener == null) { 3009 emptySlotIndex = i; 3010 } 3011 } 3012 3013 mPositionListeners[emptySlotIndex] = positionListener; 3014 mCanMove[emptySlotIndex] = canMove; 3015 mNumberOfListeners++; 3016 } 3017 3018 public void removeSubscriber(TextViewPositionListener positionListener) { 3019 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3020 if (mPositionListeners[i] == positionListener) { 3021 mPositionListeners[i] = null; 3022 mNumberOfListeners--; 3023 break; 3024 } 3025 } 3026 3027 if (mNumberOfListeners == 0) { 3028 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3029 vto.removeOnPreDrawListener(this); 3030 } 3031 } 3032 3033 public int getPositionX() { 3034 return mPositionX; 3035 } 3036 3037 public int getPositionY() { 3038 return mPositionY; 3039 } 3040 3041 public int getPositionXOnScreen() { 3042 return mPositionXOnScreen; 3043 } 3044 3045 public int getPositionYOnScreen() { 3046 return mPositionYOnScreen; 3047 } 3048 3049 @Override 3050 public boolean onPreDraw() { 3051 updatePosition(); 3052 3053 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3054 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3055 TextViewPositionListener positionListener = mPositionListeners[i]; 3056 if (positionListener != null) { 3057 positionListener.updatePosition(mPositionX, mPositionY, 3058 mPositionHasChanged, mScrollHasChanged); 3059 } 3060 } 3061 } 3062 3063 mScrollHasChanged = false; 3064 return true; 3065 } 3066 3067 private void updatePosition() { 3068 mTextView.getLocationInWindow(mTempCoords); 3069 3070 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3071 3072 mPositionX = mTempCoords[0]; 3073 mPositionY = mTempCoords[1]; 3074 3075 mTextView.getLocationOnScreen(mTempCoords); 3076 3077 mPositionXOnScreen = mTempCoords[0]; 3078 mPositionYOnScreen = mTempCoords[1]; 3079 } 3080 3081 public void onScrollChanged() { 3082 mScrollHasChanged = true; 3083 } 3084 } 3085 3086 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3087 protected PopupWindow mPopupWindow; 3088 protected ViewGroup mContentView; 3089 int mPositionX, mPositionY; 3090 int mClippingLimitLeft, mClippingLimitRight; 3091 3092 protected abstract void createPopupWindow(); 3093 protected abstract void initContentView(); 3094 protected abstract int getTextOffset(); 3095 protected abstract int getVerticalLocalPosition(int line); 3096 protected abstract int clipVertically(int positionY); 3097 protected void setUp() { 3098 } 3099 3100 public PinnedPopupWindow() { 3101 // Due to calling subclass methods in base constructor, subclass constructor is not 3102 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3103 // a chance to initialize subclasses, call setUp() method here. 3104 // TODO: It is good to extract non trivial initialization code from constructor. 3105 setUp(); 3106 3107 createPopupWindow(); 3108 3109 mPopupWindow.setWindowLayoutType( 3110 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3111 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3112 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3113 3114 initContentView(); 3115 3116 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3117 ViewGroup.LayoutParams.WRAP_CONTENT); 3118 mContentView.setLayoutParams(wrapContent); 3119 3120 mPopupWindow.setContentView(mContentView); 3121 } 3122 3123 public void show() { 3124 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3125 3126 computeLocalPosition(); 3127 3128 final PositionListener positionListener = getPositionListener(); 3129 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3130 } 3131 3132 protected void measureContent() { 3133 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3134 mContentView.measure( 3135 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3136 View.MeasureSpec.AT_MOST), 3137 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3138 View.MeasureSpec.AT_MOST)); 3139 } 3140 3141 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3142 * positioned according to viewportToContentHorizontalOffset. 3143 * 3144 * This method assumes that mContentView has properly been measured from its content. */ 3145 private void computeLocalPosition() { 3146 measureContent(); 3147 final int width = mContentView.getMeasuredWidth(); 3148 final int offset = getTextOffset(); 3149 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3150 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3151 3152 final int line = mTextView.getLayout().getLineForOffset(offset); 3153 mPositionY = getVerticalLocalPosition(line); 3154 mPositionY += mTextView.viewportToContentVerticalOffset(); 3155 } 3156 3157 private void updatePosition(int parentPositionX, int parentPositionY) { 3158 int positionX = parentPositionX + mPositionX; 3159 int positionY = parentPositionY + mPositionY; 3160 3161 positionY = clipVertically(positionY); 3162 3163 // Horizontal clipping 3164 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3165 final int width = mContentView.getMeasuredWidth(); 3166 positionX = Math.min( 3167 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3168 positionX = Math.max(-mClippingLimitLeft, positionX); 3169 3170 if (isShowing()) { 3171 mPopupWindow.update(positionX, positionY, -1, -1); 3172 } else { 3173 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3174 positionX, positionY); 3175 } 3176 } 3177 3178 public void hide() { 3179 if (!isShowing()) { 3180 return; 3181 } 3182 mPopupWindow.dismiss(); 3183 getPositionListener().removeSubscriber(this); 3184 } 3185 3186 @Override 3187 public void updatePosition(int parentPositionX, int parentPositionY, 3188 boolean parentPositionChanged, boolean parentScrolled) { 3189 // Either parentPositionChanged or parentScrolled is true, check if still visible 3190 if (isShowing() && isOffsetVisible(getTextOffset())) { 3191 if (parentScrolled) computeLocalPosition(); 3192 updatePosition(parentPositionX, parentPositionY); 3193 } else { 3194 hide(); 3195 } 3196 } 3197 3198 public boolean isShowing() { 3199 return mPopupWindow.isShowing(); 3200 } 3201 } 3202 3203 private static final class SuggestionInfo { 3204 // Range of actual suggestion within mText 3205 int mSuggestionStart, mSuggestionEnd; 3206 3207 // The SuggestionSpan that this TextView represents 3208 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3209 3210 // The index of this suggestion inside suggestionSpan 3211 int mSuggestionIndex; 3212 3213 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3214 3215 void clear() { 3216 mSuggestionSpanInfo.clear(); 3217 mText.clear(); 3218 } 3219 3220 // Utility method to set attributes about a SuggestionSpan. 3221 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3222 mSuggestionSpanInfo.mSuggestionSpan = span; 3223 mSuggestionSpanInfo.mSpanStart = spanStart; 3224 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3225 } 3226 } 3227 3228 private static final class SuggestionSpanInfo { 3229 // The SuggestionSpan; 3230 @Nullable 3231 SuggestionSpan mSuggestionSpan; 3232 3233 // The SuggestionSpan start position 3234 int mSpanStart; 3235 3236 // The SuggestionSpan end position 3237 int mSpanEnd; 3238 3239 void clear() { 3240 mSuggestionSpan = null; 3241 } 3242 } 3243 3244 private class SuggestionHelper { 3245 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3246 new SuggestionSpanComparator(); 3247 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3248 new HashMap<SuggestionSpan, Integer>(); 3249 3250 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3251 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3252 final int flag1 = span1.getFlags(); 3253 final int flag2 = span2.getFlags(); 3254 if (flag1 != flag2) { 3255 // The order here should match what is used in updateDrawState 3256 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3257 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3258 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3259 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3260 if (easy1 && !misspelled1) return -1; 3261 if (easy2 && !misspelled2) return 1; 3262 if (misspelled1) return -1; 3263 if (misspelled2) return 1; 3264 } 3265 3266 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3267 } 3268 } 3269 3270 /** 3271 * Returns the suggestion spans that cover the current cursor position. The suggestion 3272 * spans are sorted according to the length of text that they are attached to. 3273 */ 3274 private SuggestionSpan[] getSortedSuggestionSpans() { 3275 int pos = mTextView.getSelectionStart(); 3276 Spannable spannable = (Spannable) mTextView.getText(); 3277 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3278 3279 mSpansLengths.clear(); 3280 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3281 int start = spannable.getSpanStart(suggestionSpan); 3282 int end = spannable.getSpanEnd(suggestionSpan); 3283 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3284 } 3285 3286 // The suggestions are sorted according to their types (easy correction first, then 3287 // misspelled) and to the length of the text that they cover (shorter first). 3288 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3289 mSpansLengths.clear(); 3290 3291 return suggestionSpans; 3292 } 3293 3294 /** 3295 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3296 * position. 3297 * 3298 * @param suggestionInfos SuggestionInfo array the results will be set. 3299 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3300 * @return the number of suggestions actually fetched. 3301 */ 3302 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3303 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3304 final Spannable spannable = (Spannable) mTextView.getText(); 3305 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3306 final int nbSpans = suggestionSpans.length; 3307 if (nbSpans == 0) return 0; 3308 3309 int numberOfSuggestions = 0; 3310 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3311 final int spanStart = spannable.getSpanStart(suggestionSpan); 3312 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3313 3314 if (misspelledSpanInfo != null 3315 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3316 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3317 misspelledSpanInfo.mSpanStart = spanStart; 3318 misspelledSpanInfo.mSpanEnd = spanEnd; 3319 } 3320 3321 final String[] suggestions = suggestionSpan.getSuggestions(); 3322 final int nbSuggestions = suggestions.length; 3323 suggestionLoop: 3324 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3325 final String suggestion = suggestions[suggestionIndex]; 3326 for (int i = 0; i < numberOfSuggestions; i++) { 3327 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3328 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3329 final int otherSpanStart = 3330 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3331 final int otherSpanEnd = 3332 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3333 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3334 continue suggestionLoop; 3335 } 3336 } 3337 } 3338 3339 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3340 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3341 suggestionInfo.mSuggestionIndex = suggestionIndex; 3342 suggestionInfo.mSuggestionStart = 0; 3343 suggestionInfo.mSuggestionEnd = suggestion.length(); 3344 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3345 numberOfSuggestions++; 3346 if (numberOfSuggestions >= suggestionInfos.length) { 3347 return numberOfSuggestions; 3348 } 3349 } 3350 } 3351 return numberOfSuggestions; 3352 } 3353 } 3354 3355 @VisibleForTesting 3356 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3357 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3358 3359 // Key of intent extras for inserting new word into user dictionary. 3360 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3361 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3362 3363 private SuggestionInfo[] mSuggestionInfos; 3364 private int mNumberOfSuggestions; 3365 private boolean mCursorWasVisibleBeforeSuggestions; 3366 private boolean mIsShowingUp = false; 3367 private SuggestionAdapter mSuggestionsAdapter; 3368 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3369 private TextView mAddToDictionaryButton; 3370 private TextView mDeleteButton; 3371 private ListView mSuggestionListView; 3372 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3373 private int mContainerMarginWidth; 3374 private int mContainerMarginTop; 3375 private LinearLayout mContainerView; 3376 private Context mContext; // TODO: Make mContext final. 3377 3378 private class CustomPopupWindow extends PopupWindow { 3379 3380 @Override 3381 public void dismiss() { 3382 if (!isShowing()) { 3383 return; 3384 } 3385 super.dismiss(); 3386 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3387 3388 // Safe cast since show() checks that mTextView.getText() is an Editable 3389 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3390 3391 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3392 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3393 getInsertionController().show(); 3394 } 3395 } 3396 } 3397 3398 public SuggestionsPopupWindow() { 3399 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3400 } 3401 3402 @Override 3403 protected void setUp() { 3404 mContext = applyDefaultTheme(mTextView.getContext()); 3405 mHighlightSpan = new TextAppearanceSpan(mContext, 3406 mTextView.mTextEditSuggestionHighlightStyle); 3407 } 3408 3409 private Context applyDefaultTheme(Context originalContext) { 3410 TypedArray a = originalContext.obtainStyledAttributes( 3411 new int[]{com.android.internal.R.attr.isLightTheme}); 3412 boolean isLightTheme = a.getBoolean(0, true); 3413 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3414 : R.style.ThemeOverlay_Material_Dark; 3415 a.recycle(); 3416 return new ContextThemeWrapper(originalContext, themeId); 3417 } 3418 3419 @Override 3420 protected void createPopupWindow() { 3421 mPopupWindow = new CustomPopupWindow(); 3422 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3423 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3424 mPopupWindow.setFocusable(true); 3425 mPopupWindow.setClippingEnabled(false); 3426 } 3427 3428 @Override 3429 protected void initContentView() { 3430 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3431 Context.LAYOUT_INFLATER_SERVICE); 3432 mContentView = (ViewGroup) inflater.inflate( 3433 mTextView.mTextEditSuggestionContainerLayout, null); 3434 3435 mContainerView = (LinearLayout) mContentView.findViewById( 3436 com.android.internal.R.id.suggestionWindowContainer); 3437 ViewGroup.MarginLayoutParams lp = 3438 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3439 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3440 mContainerMarginTop = lp.topMargin; 3441 mClippingLimitLeft = lp.leftMargin; 3442 mClippingLimitRight = lp.rightMargin; 3443 3444 mSuggestionListView = (ListView) mContentView.findViewById( 3445 com.android.internal.R.id.suggestionContainer); 3446 3447 mSuggestionsAdapter = new SuggestionAdapter(); 3448 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3449 mSuggestionListView.setOnItemClickListener(this); 3450 3451 // Inflate the suggestion items once and for all. 3452 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3453 for (int i = 0; i < mSuggestionInfos.length; i++) { 3454 mSuggestionInfos[i] = new SuggestionInfo(); 3455 } 3456 3457 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3458 com.android.internal.R.id.addToDictionaryButton); 3459 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3460 public void onClick(View v) { 3461 final SuggestionSpan misspelledSpan = 3462 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3463 if (misspelledSpan == null) { 3464 // Span has been removed. 3465 return; 3466 } 3467 final Editable editable = (Editable) mTextView.getText(); 3468 final int spanStart = editable.getSpanStart(misspelledSpan); 3469 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3470 if (spanStart < 0 || spanEnd <= spanStart) { 3471 return; 3472 } 3473 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3474 3475 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3476 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3477 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3478 mTextView.getTextServicesLocale().toString()); 3479 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3480 mTextView.getContext().startActivity(intent); 3481 // There is no way to know if the word was indeed added. Re-check. 3482 // TODO The ExtractEditText should remove the span in the original text instead 3483 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3484 Selection.setSelection(editable, spanEnd); 3485 updateSpellCheckSpans(spanStart, spanEnd, false); 3486 hideWithCleanUp(); 3487 } 3488 }); 3489 3490 mDeleteButton = (TextView) mContentView.findViewById( 3491 com.android.internal.R.id.deleteButton); 3492 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3493 public void onClick(View v) { 3494 final Editable editable = (Editable) mTextView.getText(); 3495 3496 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3497 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3498 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3499 // Do not leave two adjacent spaces after deletion, or one at beginning of 3500 // text 3501 if (spanUnionEnd < editable.length() 3502 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3503 && (spanUnionStart == 0 3504 || Character.isSpaceChar( 3505 editable.charAt(spanUnionStart - 1)))) { 3506 spanUnionEnd = spanUnionEnd + 1; 3507 } 3508 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3509 } 3510 hideWithCleanUp(); 3511 } 3512 }); 3513 3514 } 3515 3516 public boolean isShowingUp() { 3517 return mIsShowingUp; 3518 } 3519 3520 public void onParentLostFocus() { 3521 mIsShowingUp = false; 3522 } 3523 3524 private class SuggestionAdapter extends BaseAdapter { 3525 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3526 Context.LAYOUT_INFLATER_SERVICE); 3527 3528 @Override 3529 public int getCount() { 3530 return mNumberOfSuggestions; 3531 } 3532 3533 @Override 3534 public Object getItem(int position) { 3535 return mSuggestionInfos[position]; 3536 } 3537 3538 @Override 3539 public long getItemId(int position) { 3540 return position; 3541 } 3542 3543 @Override 3544 public View getView(int position, View convertView, ViewGroup parent) { 3545 TextView textView = (TextView) convertView; 3546 3547 if (textView == null) { 3548 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3549 parent, false); 3550 } 3551 3552 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3553 textView.setText(suggestionInfo.mText); 3554 return textView; 3555 } 3556 } 3557 3558 @VisibleForTesting 3559 public ViewGroup getContentViewForTesting() { 3560 return mContentView; 3561 } 3562 3563 @Override 3564 public void show() { 3565 if (!(mTextView.getText() instanceof Editable)) return; 3566 if (extractedTextModeWillBeStarted()) { 3567 return; 3568 } 3569 3570 if (updateSuggestions()) { 3571 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3572 mTextView.setCursorVisible(false); 3573 mIsShowingUp = true; 3574 super.show(); 3575 } 3576 } 3577 3578 @Override 3579 protected void measureContent() { 3580 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3581 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3582 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3583 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3584 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3585 3586 int width = 0; 3587 View view = null; 3588 for (int i = 0; i < mNumberOfSuggestions; i++) { 3589 view = mSuggestionsAdapter.getView(i, view, mContentView); 3590 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3591 view.measure(horizontalMeasure, verticalMeasure); 3592 width = Math.max(width, view.getMeasuredWidth()); 3593 } 3594 3595 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3596 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3597 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3598 } 3599 3600 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3601 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3602 3603 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3604 + mContainerMarginWidth; 3605 3606 // Enforce the width based on actual text widths 3607 mContentView.measure( 3608 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3609 verticalMeasure); 3610 3611 Drawable popupBackground = mPopupWindow.getBackground(); 3612 if (popupBackground != null) { 3613 if (mTempRect == null) mTempRect = new Rect(); 3614 popupBackground.getPadding(mTempRect); 3615 width += mTempRect.left + mTempRect.right; 3616 } 3617 mPopupWindow.setWidth(width); 3618 } 3619 3620 @Override 3621 protected int getTextOffset() { 3622 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3623 } 3624 3625 @Override 3626 protected int getVerticalLocalPosition(int line) { 3627 return mTextView.getLayout().getLineBottom(line) - mContainerMarginTop; 3628 } 3629 3630 @Override 3631 protected int clipVertically(int positionY) { 3632 final int height = mContentView.getMeasuredHeight(); 3633 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3634 return Math.min(positionY, displayMetrics.heightPixels - height); 3635 } 3636 3637 private void hideWithCleanUp() { 3638 for (final SuggestionInfo info : mSuggestionInfos) { 3639 info.clear(); 3640 } 3641 mMisspelledSpanInfo.clear(); 3642 hide(); 3643 } 3644 3645 private boolean updateSuggestions() { 3646 Spannable spannable = (Spannable) mTextView.getText(); 3647 mNumberOfSuggestions = 3648 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3649 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3650 return false; 3651 } 3652 3653 int spanUnionStart = mTextView.getText().length(); 3654 int spanUnionEnd = 0; 3655 3656 for (int i = 0; i < mNumberOfSuggestions; i++) { 3657 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3658 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3659 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3660 } 3661 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3662 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3663 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3664 } 3665 3666 for (int i = 0; i < mNumberOfSuggestions; i++) { 3667 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3668 } 3669 3670 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3671 int addToDictionaryButtonVisibility = View.GONE; 3672 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3673 if (mMisspelledSpanInfo.mSpanStart >= 0 3674 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3675 addToDictionaryButtonVisibility = View.VISIBLE; 3676 } 3677 } 3678 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3679 3680 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3681 final int underlineColor; 3682 if (mNumberOfSuggestions != 0) { 3683 underlineColor = 3684 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3685 } else { 3686 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3687 } 3688 3689 if (underlineColor == 0) { 3690 // Fallback on the default highlight color when the first span does not provide one 3691 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3692 } else { 3693 final float BACKGROUND_TRANSPARENCY = 0.4f; 3694 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3695 mSuggestionRangeSpan.setBackgroundColor( 3696 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3697 } 3698 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3699 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3700 3701 mSuggestionsAdapter.notifyDataSetChanged(); 3702 return true; 3703 } 3704 3705 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3706 int unionEnd) { 3707 final Spannable text = (Spannable) mTextView.getText(); 3708 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3709 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3710 3711 // Adjust the start/end of the suggestion span 3712 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3713 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3714 + suggestionInfo.mText.length(); 3715 3716 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3717 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3718 3719 // Add the text before and after the span. 3720 final String textAsString = text.toString(); 3721 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3722 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3723 } 3724 3725 @Override 3726 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3727 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3728 replaceWithSuggestion(suggestionInfo); 3729 hideWithCleanUp(); 3730 } 3731 } 3732 3733 /** 3734 * An ActionMode Callback class that is used to provide actions while in text insertion or 3735 * selection mode. 3736 * 3737 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3738 * actions, depending on which of these this TextView supports and the current selection. 3739 */ 3740 private class TextActionModeCallback extends ActionMode.Callback2 { 3741 private final Path mSelectionPath = new Path(); 3742 private final RectF mSelectionBounds = new RectF(); 3743 private final boolean mHasSelection; 3744 private final int mHandleHeight; 3745 3746 public TextActionModeCallback(boolean hasSelection) { 3747 mHasSelection = hasSelection; 3748 if (mHasSelection) { 3749 SelectionModifierCursorController selectionController = getSelectionController(); 3750 if (selectionController.mStartHandle == null) { 3751 // As these are for initializing selectionController, hide() must be called. 3752 selectionController.initDrawables(); 3753 selectionController.initHandles(); 3754 selectionController.hide(); 3755 } 3756 mHandleHeight = Math.max( 3757 mSelectHandleLeft.getMinimumHeight(), 3758 mSelectHandleRight.getMinimumHeight()); 3759 } else { 3760 InsertionPointCursorController insertionController = getInsertionController(); 3761 if (insertionController != null) { 3762 insertionController.getHandle(); 3763 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3764 } else { 3765 mHandleHeight = 0; 3766 } 3767 } 3768 } 3769 3770 @Override 3771 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3772 mode.setTitle(null); 3773 mode.setSubtitle(null); 3774 mode.setTitleOptionalHint(true); 3775 populateMenuWithItems(menu); 3776 updateAssistMenuItem(menu); 3777 3778 Callback customCallback = getCustomCallback(); 3779 if (customCallback != null) { 3780 if (!customCallback.onCreateActionMode(mode, menu)) { 3781 // The custom mode can choose to cancel the action mode, dismiss selection. 3782 Selection.setSelection((Spannable) mTextView.getText(), 3783 mTextView.getSelectionEnd()); 3784 return false; 3785 } 3786 } 3787 3788 if (mTextView.canProcessText()) { 3789 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3790 } 3791 3792 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3793 if (mHasSelection && !mTextView.hasTransientState()) { 3794 mTextView.setHasTransientState(true); 3795 } 3796 return true; 3797 } else { 3798 return false; 3799 } 3800 } 3801 3802 private Callback getCustomCallback() { 3803 return mHasSelection 3804 ? mCustomSelectionActionModeCallback 3805 : mCustomInsertionActionModeCallback; 3806 } 3807 3808 private void populateMenuWithItems(Menu menu) { 3809 if (mTextView.canCut()) { 3810 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3811 com.android.internal.R.string.cut) 3812 .setAlphabeticShortcut('x') 3813 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3814 } 3815 3816 if (mTextView.canCopy()) { 3817 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3818 com.android.internal.R.string.copy) 3819 .setAlphabeticShortcut('c') 3820 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3821 } 3822 3823 if (mTextView.canPaste()) { 3824 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3825 com.android.internal.R.string.paste) 3826 .setAlphabeticShortcut('v') 3827 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3828 } 3829 3830 if (mTextView.canShare()) { 3831 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3832 com.android.internal.R.string.share) 3833 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3834 } 3835 3836 if (mTextView.canRequestAutofill()) { 3837 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3838 com.android.internal.R.string.autofill) 3839 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3840 } 3841 3842 updateSelectAllItem(menu); 3843 updateReplaceItem(menu); 3844 } 3845 3846 @Override 3847 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3848 updateSelectAllItem(menu); 3849 updateReplaceItem(menu); 3850 updateAssistMenuItem(menu); 3851 3852 Callback customCallback = getCustomCallback(); 3853 if (customCallback != null) { 3854 return customCallback.onPrepareActionMode(mode, menu); 3855 } 3856 return true; 3857 } 3858 3859 private void updateSelectAllItem(Menu menu) { 3860 boolean canSelectAll = mTextView.canSelectAllText(); 3861 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3862 if (canSelectAll && !selectAllItemExists) { 3863 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3864 com.android.internal.R.string.selectAll) 3865 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3866 } else if (!canSelectAll && selectAllItemExists) { 3867 menu.removeItem(TextView.ID_SELECT_ALL); 3868 } 3869 } 3870 3871 private void updateReplaceItem(Menu menu) { 3872 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3873 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3874 if (canReplace && !replaceItemExists) { 3875 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3876 com.android.internal.R.string.replace) 3877 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3878 } else if (!canReplace && replaceItemExists) { 3879 menu.removeItem(TextView.ID_REPLACE); 3880 } 3881 } 3882 3883 private void updateAssistMenuItem(Menu menu) { 3884 menu.removeItem(TextView.ID_ASSIST); 3885 final TextClassificationResult textClassificationResult = 3886 getSelectionActionModeHelper().getTextClassificationResult(); 3887 if (textClassificationResult != null) { 3888 final Drawable icon = textClassificationResult.getIcon(); 3889 final CharSequence label = textClassificationResult.getLabel(); 3890 final OnClickListener onClickListener = 3891 textClassificationResult.getOnClickListener(); 3892 final Intent intent = textClassificationResult.getIntent(); 3893 if ((icon != null || !TextUtils.isEmpty(label)) 3894 && (onClickListener != null || intent != null)) { 3895 menu.add(TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, label) 3896 .setIcon(icon) 3897 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3898 } 3899 } 3900 } 3901 3902 @Override 3903 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3904 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3905 return true; 3906 } 3907 Callback customCallback = getCustomCallback(); 3908 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3909 return true; 3910 } 3911 final TextClassificationResult textClassificationResult = 3912 getSelectionActionModeHelper().getTextClassificationResult(); 3913 if (TextView.ID_ASSIST == item.getItemId() && textClassificationResult != null) { 3914 final OnClickListener onClickListener = 3915 textClassificationResult.getOnClickListener(); 3916 if (onClickListener != null) { 3917 onClickListener.onClick(mTextView); 3918 } else { 3919 final Intent intent = textClassificationResult.getIntent(); 3920 if (intent != null) { 3921 TextClassificationResult.createStartActivityOnClickListener( 3922 mTextView.getContext(), intent) 3923 .onClick(mTextView); 3924 } 3925 } 3926 stopTextActionMode(); 3927 return true; 3928 } 3929 return mTextView.onTextContextMenuItem(item.getItemId()); 3930 } 3931 3932 @Override 3933 public void onDestroyActionMode(ActionMode mode) { 3934 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3935 getSelectionActionModeHelper().onDestroyActionMode(); 3936 mTextActionMode = null; 3937 Callback customCallback = getCustomCallback(); 3938 if (customCallback != null) { 3939 customCallback.onDestroyActionMode(mode); 3940 } 3941 3942 if (!mPreserveSelection) { 3943 /* 3944 * Leave current selection when we tentatively destroy action mode for the 3945 * selection. If we're detaching from a window, we'll bring back the selection 3946 * mode when (if) we get reattached. 3947 */ 3948 Selection.setSelection((Spannable) mTextView.getText(), 3949 mTextView.getSelectionEnd()); 3950 } 3951 3952 if (mSelectionModifierCursorController != null) { 3953 mSelectionModifierCursorController.hide(); 3954 } 3955 } 3956 3957 @Override 3958 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3959 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3960 super.onGetContentRect(mode, view, outRect); 3961 return; 3962 } 3963 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3964 // We have a selection. 3965 mSelectionPath.reset(); 3966 mTextView.getLayout().getSelectionPath( 3967 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3968 mSelectionPath.computeBounds(mSelectionBounds, true); 3969 mSelectionBounds.bottom += mHandleHeight; 3970 } else if (mCursorCount == 2) { 3971 // We have a split cursor. In this case, we take the rectangle that includes both 3972 // parts of the cursor to ensure we don't obscure either of them. 3973 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3974 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3975 mSelectionBounds.set( 3976 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3977 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3978 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3979 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3980 + mHandleHeight); 3981 } else { 3982 // We have a single cursor. 3983 Layout layout = mTextView.getLayout(); 3984 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 3985 float primaryHorizontal = clampHorizontalPosition(null, 3986 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 3987 mSelectionBounds.set( 3988 primaryHorizontal, 3989 layout.getLineTop(line), 3990 primaryHorizontal, 3991 layout.getLineTop(line + 1) + mHandleHeight); 3992 } 3993 // Take TextView's padding and scroll into account. 3994 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3995 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3996 outRect.set( 3997 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3998 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3999 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4000 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4001 } 4002 } 4003 4004 /** 4005 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4006 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4007 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4008 */ 4009 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4010 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4011 final int[] mTmpIntOffset = new int[2]; 4012 final Matrix mViewToScreenMatrix = new Matrix(); 4013 4014 @Override 4015 public void updatePosition(int parentPositionX, int parentPositionY, 4016 boolean parentPositionChanged, boolean parentScrolled) { 4017 final InputMethodState ims = mInputMethodState; 4018 if (ims == null || ims.mBatchEditNesting > 0) { 4019 return; 4020 } 4021 final InputMethodManager imm = InputMethodManager.peekInstance(); 4022 if (null == imm) { 4023 return; 4024 } 4025 if (!imm.isActive(mTextView)) { 4026 return; 4027 } 4028 // Skip if the IME has not requested the cursor/anchor position. 4029 if (!imm.isCursorAnchorInfoEnabled()) { 4030 return; 4031 } 4032 Layout layout = mTextView.getLayout(); 4033 if (layout == null) { 4034 return; 4035 } 4036 4037 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4038 builder.reset(); 4039 4040 final int selectionStart = mTextView.getSelectionStart(); 4041 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4042 4043 // Construct transformation matrix from view local coordinates to screen coordinates. 4044 mViewToScreenMatrix.set(mTextView.getMatrix()); 4045 mTextView.getLocationOnScreen(mTmpIntOffset); 4046 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4047 builder.setMatrix(mViewToScreenMatrix); 4048 4049 final float viewportToContentHorizontalOffset = 4050 mTextView.viewportToContentHorizontalOffset(); 4051 final float viewportToContentVerticalOffset = 4052 mTextView.viewportToContentVerticalOffset(); 4053 4054 final CharSequence text = mTextView.getText(); 4055 if (text instanceof Spannable) { 4056 final Spannable sp = (Spannable) text; 4057 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4058 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4059 if (composingTextEnd < composingTextStart) { 4060 final int temp = composingTextEnd; 4061 composingTextEnd = composingTextStart; 4062 composingTextStart = temp; 4063 } 4064 final boolean hasComposingText = 4065 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4066 if (hasComposingText) { 4067 final CharSequence composingText = text.subSequence(composingTextStart, 4068 composingTextEnd); 4069 builder.setComposingText(composingTextStart, composingText); 4070 mTextView.populateCharacterBounds(builder, composingTextStart, 4071 composingTextEnd, viewportToContentHorizontalOffset, 4072 viewportToContentVerticalOffset); 4073 } 4074 } 4075 4076 // Treat selectionStart as the insertion point. 4077 if (0 <= selectionStart) { 4078 final int offset = selectionStart; 4079 final int line = layout.getLineForOffset(offset); 4080 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4081 + viewportToContentHorizontalOffset; 4082 final float insertionMarkerTop = layout.getLineTop(line) 4083 + viewportToContentVerticalOffset; 4084 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4085 + viewportToContentVerticalOffset; 4086 final float insertionMarkerBottom = layout.getLineBottom(line) 4087 + viewportToContentVerticalOffset; 4088 final boolean isTopVisible = mTextView 4089 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4090 final boolean isBottomVisible = mTextView 4091 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4092 int insertionMarkerFlags = 0; 4093 if (isTopVisible || isBottomVisible) { 4094 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4095 } 4096 if (!isTopVisible || !isBottomVisible) { 4097 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4098 } 4099 if (layout.isRtlCharAt(offset)) { 4100 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4101 } 4102 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4103 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4104 } 4105 4106 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4107 } 4108 } 4109 4110 @VisibleForTesting 4111 public abstract class HandleView extends View implements TextViewPositionListener { 4112 protected Drawable mDrawable; 4113 protected Drawable mDrawableLtr; 4114 protected Drawable mDrawableRtl; 4115 private final PopupWindow mContainer; 4116 // Position with respect to the parent TextView 4117 private int mPositionX, mPositionY; 4118 private boolean mIsDragging; 4119 // Offset from touch position to mPosition 4120 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4121 protected int mHotspotX; 4122 protected int mHorizontalGravity; 4123 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4124 private float mTouchOffsetY; 4125 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4126 private float mIdealVerticalOffset; 4127 // Parent's (TextView) previous position in window 4128 private int mLastParentX, mLastParentY; 4129 // Parent's (TextView) previous position on screen 4130 private int mLastParentXOnScreen, mLastParentYOnScreen; 4131 // Previous text character offset 4132 protected int mPreviousOffset = -1; 4133 // Previous text character offset 4134 private boolean mPositionHasChanged = true; 4135 // Minimum touch target size for handles 4136 private int mMinSize; 4137 // Indicates the line of text that the handle is on. 4138 protected int mPrevLine = UNSET_LINE; 4139 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4140 // when selecting text when the handles jump to the end / start of words which may be on 4141 // a different line. 4142 protected int mPreviousLineTouched = UNSET_LINE; 4143 4144 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4145 super(mTextView.getContext()); 4146 setId(id); 4147 mContainer = new PopupWindow(mTextView.getContext(), null, 4148 com.android.internal.R.attr.textSelectHandleWindowStyle); 4149 mContainer.setSplitTouchEnabled(true); 4150 mContainer.setClippingEnabled(false); 4151 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4152 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4153 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4154 mContainer.setContentView(this); 4155 4156 mDrawableLtr = drawableLtr; 4157 mDrawableRtl = drawableRtl; 4158 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4159 com.android.internal.R.dimen.text_handle_min_size); 4160 4161 updateDrawable(); 4162 4163 final int handleHeight = getPreferredHeight(); 4164 mTouchOffsetY = -0.3f * handleHeight; 4165 mIdealVerticalOffset = 0.7f * handleHeight; 4166 } 4167 4168 public float getIdealVerticalOffset() { 4169 return mIdealVerticalOffset; 4170 } 4171 4172 protected void updateDrawable() { 4173 if (mIsDragging) { 4174 // Don't update drawable during dragging. 4175 return; 4176 } 4177 final Layout layout = mTextView.getLayout(); 4178 if (layout == null) { 4179 return; 4180 } 4181 final int offset = getCurrentCursorOffset(); 4182 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4183 final Drawable oldDrawable = mDrawable; 4184 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4185 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4186 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4187 if (oldDrawable != mDrawable && isShowing()) { 4188 // Update popup window position. 4189 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4190 - getHorizontalOffset() + getCursorOffset(); 4191 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4192 mPositionHasChanged = true; 4193 updatePosition(mLastParentX, mLastParentY, false, false); 4194 postInvalidate(); 4195 } 4196 } 4197 4198 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4199 protected abstract int getHorizontalGravity(boolean isRtlRun); 4200 4201 // Touch-up filter: number of previous positions remembered 4202 private static final int HISTORY_SIZE = 5; 4203 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4204 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4205 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4206 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4207 private int mPreviousOffsetIndex = 0; 4208 private int mNumberPreviousOffsets = 0; 4209 4210 private void startTouchUpFilter(int offset) { 4211 mNumberPreviousOffsets = 0; 4212 addPositionToTouchUpFilter(offset); 4213 } 4214 4215 private void addPositionToTouchUpFilter(int offset) { 4216 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4217 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4218 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4219 mNumberPreviousOffsets++; 4220 } 4221 4222 private void filterOnTouchUp() { 4223 final long now = SystemClock.uptimeMillis(); 4224 int i = 0; 4225 int index = mPreviousOffsetIndex; 4226 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4227 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4228 i++; 4229 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4230 } 4231 4232 if (i > 0 && i < iMax 4233 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4234 positionAtCursorOffset(mPreviousOffsets[index], false); 4235 } 4236 } 4237 4238 public boolean offsetHasBeenChanged() { 4239 return mNumberPreviousOffsets > 1; 4240 } 4241 4242 @Override 4243 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4244 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4245 } 4246 4247 @Override 4248 public void invalidate() { 4249 super.invalidate(); 4250 if (isShowing()) { 4251 positionAtCursorOffset(getCurrentCursorOffset(), true); 4252 } 4253 }; 4254 4255 private int getPreferredWidth() { 4256 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4257 } 4258 4259 private int getPreferredHeight() { 4260 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4261 } 4262 4263 public void show() { 4264 if (isShowing()) return; 4265 4266 getPositionListener().addSubscriber(this, true /* local position may change */); 4267 4268 // Make sure the offset is always considered new, even when focusing at same position 4269 mPreviousOffset = -1; 4270 positionAtCursorOffset(getCurrentCursorOffset(), false); 4271 } 4272 4273 protected void dismiss() { 4274 mIsDragging = false; 4275 mContainer.dismiss(); 4276 onDetached(); 4277 } 4278 4279 public void hide() { 4280 dismiss(); 4281 4282 getPositionListener().removeSubscriber(this); 4283 } 4284 4285 public boolean isShowing() { 4286 return mContainer.isShowing(); 4287 } 4288 4289 private boolean isVisible() { 4290 // Always show a dragging handle. 4291 if (mIsDragging) { 4292 return true; 4293 } 4294 4295 if (mTextView.isInBatchEditMode()) { 4296 return false; 4297 } 4298 4299 return mTextView.isPositionVisible( 4300 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4301 } 4302 4303 public abstract int getCurrentCursorOffset(); 4304 4305 protected abstract void updateSelection(int offset); 4306 4307 public abstract void updatePosition(float x, float y); 4308 4309 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4310 return layout.isRtlCharAt(offset); 4311 } 4312 4313 @VisibleForTesting 4314 public float getHorizontal(@NonNull Layout layout, int offset) { 4315 return layout.getPrimaryHorizontal(offset); 4316 } 4317 4318 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4319 return mTextView.getOffsetAtCoordinate(line, x); 4320 } 4321 4322 /** 4323 * @param offset Cursor offset. Must be in [-1, length]. 4324 * @param forceUpdatePosition whether to force update the position. This should be true 4325 * when If the parent has been scrolled, for example. 4326 */ 4327 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4328 // A HandleView relies on the layout, which may be nulled by external methods 4329 Layout layout = mTextView.getLayout(); 4330 if (layout == null) { 4331 // Will update controllers' state, hiding them and stopping selection mode if needed 4332 prepareCursorControllers(); 4333 return; 4334 } 4335 layout = mTextView.getLayout(); 4336 4337 boolean offsetChanged = offset != mPreviousOffset; 4338 if (offsetChanged || forceUpdatePosition) { 4339 if (offsetChanged) { 4340 updateSelection(offset); 4341 addPositionToTouchUpFilter(offset); 4342 } 4343 final int line = getLineForOffset(layout, offset); 4344 mPrevLine = line; 4345 4346 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4347 - getHorizontalOffset() + getCursorOffset(); 4348 mPositionY = layout.getLineBottom(line); 4349 4350 // Take TextView's padding and scroll into account. 4351 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4352 mPositionY += mTextView.viewportToContentVerticalOffset(); 4353 4354 mPreviousOffset = offset; 4355 mPositionHasChanged = true; 4356 } 4357 } 4358 4359 /** 4360 * Return the clamped horizontal position for the first cursor. 4361 * 4362 * @param layout Text layout. 4363 * @param offset Character offset for the cursor. 4364 * @return The clamped horizontal position for the cursor. 4365 */ 4366 int getCursorHorizontalPosition(Layout layout, int offset) { 4367 return (int) (getHorizontal(layout, offset) - 0.5f); 4368 } 4369 4370 /** 4371 * @param layout Text layout. 4372 * @param offset Character offset for the cursor. 4373 * @return The line the cursor should be at. 4374 */ 4375 int getLineForOffset(Layout layout, int offset) { 4376 return layout.getLineForOffset(offset); 4377 } 4378 4379 @Override 4380 public void updatePosition(int parentPositionX, int parentPositionY, 4381 boolean parentPositionChanged, boolean parentScrolled) { 4382 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 4383 if (parentPositionChanged || mPositionHasChanged) { 4384 if (mIsDragging) { 4385 // Update touchToWindow offset in case of parent scrolling while dragging 4386 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4387 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4388 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4389 mLastParentX = parentPositionX; 4390 mLastParentY = parentPositionY; 4391 } 4392 4393 onHandleMoved(); 4394 } 4395 4396 if (isVisible()) { 4397 // Transform to the window coordinates to follow the view tranformation. 4398 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4399 mTextView.transformFromViewToWindowSpace(pts); 4400 pts[0] -= mHotspotX + getHorizontalOffset(); 4401 4402 if (isShowing()) { 4403 mContainer.update(pts[0], pts[1], -1, -1); 4404 } else { 4405 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4406 } 4407 } else { 4408 if (isShowing()) { 4409 dismiss(); 4410 } 4411 } 4412 4413 mPositionHasChanged = false; 4414 } 4415 } 4416 4417 @Override 4418 protected void onDraw(Canvas c) { 4419 final int drawWidth = mDrawable.getIntrinsicWidth(); 4420 final int left = getHorizontalOffset(); 4421 4422 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4423 mDrawable.draw(c); 4424 } 4425 4426 private int getHorizontalOffset() { 4427 final int width = getPreferredWidth(); 4428 final int drawWidth = mDrawable.getIntrinsicWidth(); 4429 final int left; 4430 switch (mHorizontalGravity) { 4431 case Gravity.LEFT: 4432 left = 0; 4433 break; 4434 default: 4435 case Gravity.CENTER: 4436 left = (width - drawWidth) / 2; 4437 break; 4438 case Gravity.RIGHT: 4439 left = width - drawWidth; 4440 break; 4441 } 4442 return left; 4443 } 4444 4445 protected int getCursorOffset() { 4446 return 0; 4447 } 4448 4449 @Override 4450 public boolean onTouchEvent(MotionEvent ev) { 4451 updateFloatingToolbarVisibility(ev); 4452 4453 switch (ev.getActionMasked()) { 4454 case MotionEvent.ACTION_DOWN: { 4455 startTouchUpFilter(getCurrentCursorOffset()); 4456 4457 final PositionListener positionListener = getPositionListener(); 4458 mLastParentX = positionListener.getPositionX(); 4459 mLastParentY = positionListener.getPositionY(); 4460 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4461 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4462 4463 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4464 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4465 mTouchToWindowOffsetX = xInWindow - mPositionX; 4466 mTouchToWindowOffsetY = yInWindow - mPositionY; 4467 4468 mIsDragging = true; 4469 mPreviousLineTouched = UNSET_LINE; 4470 break; 4471 } 4472 4473 case MotionEvent.ACTION_MOVE: { 4474 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4475 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4476 4477 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4478 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4479 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4480 float newVerticalOffset; 4481 if (previousVerticalOffset < mIdealVerticalOffset) { 4482 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4483 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4484 } else { 4485 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4486 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4487 } 4488 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4489 4490 final float newPosX = 4491 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4492 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4493 4494 updatePosition(newPosX, newPosY); 4495 break; 4496 } 4497 4498 case MotionEvent.ACTION_UP: 4499 filterOnTouchUp(); 4500 mIsDragging = false; 4501 updateDrawable(); 4502 break; 4503 4504 case MotionEvent.ACTION_CANCEL: 4505 mIsDragging = false; 4506 updateDrawable(); 4507 break; 4508 } 4509 return true; 4510 } 4511 4512 public boolean isDragging() { 4513 return mIsDragging; 4514 } 4515 4516 void onHandleMoved() {} 4517 4518 public void onDetached() {} 4519 } 4520 4521 private class InsertionHandleView extends HandleView { 4522 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4523 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4524 4525 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4526 private float mDownPositionX, mDownPositionY; 4527 private Runnable mHider; 4528 4529 public InsertionHandleView(Drawable drawable) { 4530 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4531 } 4532 4533 @Override 4534 public void show() { 4535 super.show(); 4536 4537 final long durationSinceCutOrCopy = 4538 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4539 4540 // Cancel the single tap delayed runnable. 4541 if (mInsertionActionModeRunnable != null 4542 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4543 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4544 || isCursorInsideEasyCorrectionSpan())) { 4545 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4546 } 4547 4548 // Prepare and schedule the single tap runnable to run exactly after the double tap 4549 // timeout has passed. 4550 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4551 && !isCursorInsideEasyCorrectionSpan() 4552 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4553 if (mTextActionMode == null) { 4554 if (mInsertionActionModeRunnable == null) { 4555 mInsertionActionModeRunnable = new Runnable() { 4556 @Override 4557 public void run() { 4558 startInsertionActionMode(); 4559 } 4560 }; 4561 } 4562 mTextView.postDelayed( 4563 mInsertionActionModeRunnable, 4564 ViewConfiguration.getDoubleTapTimeout() + 1); 4565 } 4566 4567 } 4568 4569 hideAfterDelay(); 4570 } 4571 4572 private void hideAfterDelay() { 4573 if (mHider == null) { 4574 mHider = new Runnable() { 4575 public void run() { 4576 hide(); 4577 } 4578 }; 4579 } else { 4580 removeHiderCallback(); 4581 } 4582 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4583 } 4584 4585 private void removeHiderCallback() { 4586 if (mHider != null) { 4587 mTextView.removeCallbacks(mHider); 4588 } 4589 } 4590 4591 @Override 4592 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4593 return drawable.getIntrinsicWidth() / 2; 4594 } 4595 4596 @Override 4597 protected int getHorizontalGravity(boolean isRtlRun) { 4598 return Gravity.CENTER_HORIZONTAL; 4599 } 4600 4601 @Override 4602 protected int getCursorOffset() { 4603 int offset = super.getCursorOffset(); 4604 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4605 if (cursor != null) { 4606 cursor.getPadding(mTempRect); 4607 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4608 } 4609 return offset; 4610 } 4611 4612 @Override 4613 int getCursorHorizontalPosition(Layout layout, int offset) { 4614 final Drawable drawable = mCursorCount > 0 ? mCursorDrawable[0] : null; 4615 if (drawable != null) { 4616 final float horizontal = getHorizontal(layout, offset); 4617 return clampHorizontalPosition(drawable, horizontal) + mTempRect.left; 4618 } 4619 return super.getCursorHorizontalPosition(layout, offset); 4620 } 4621 4622 @Override 4623 public boolean onTouchEvent(MotionEvent ev) { 4624 final boolean result = super.onTouchEvent(ev); 4625 4626 switch (ev.getActionMasked()) { 4627 case MotionEvent.ACTION_DOWN: 4628 mDownPositionX = ev.getRawX(); 4629 mDownPositionY = ev.getRawY(); 4630 break; 4631 4632 case MotionEvent.ACTION_UP: 4633 if (!offsetHasBeenChanged()) { 4634 final float deltaX = mDownPositionX - ev.getRawX(); 4635 final float deltaY = mDownPositionY - ev.getRawY(); 4636 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4637 4638 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4639 mTextView.getContext()); 4640 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4641 4642 if (distanceSquared < touchSlop * touchSlop) { 4643 // Tapping on the handle toggles the insertion action mode. 4644 if (mTextActionMode != null) { 4645 stopTextActionMode(); 4646 } else { 4647 startInsertionActionMode(); 4648 } 4649 } 4650 } else { 4651 if (mTextActionMode != null) { 4652 mTextActionMode.invalidateContentRect(); 4653 } 4654 } 4655 hideAfterDelay(); 4656 break; 4657 4658 case MotionEvent.ACTION_CANCEL: 4659 hideAfterDelay(); 4660 break; 4661 4662 default: 4663 break; 4664 } 4665 4666 return result; 4667 } 4668 4669 @Override 4670 public int getCurrentCursorOffset() { 4671 return mTextView.getSelectionStart(); 4672 } 4673 4674 @Override 4675 public void updateSelection(int offset) { 4676 Selection.setSelection((Spannable) mTextView.getText(), offset); 4677 } 4678 4679 @Override 4680 public void updatePosition(float x, float y) { 4681 Layout layout = mTextView.getLayout(); 4682 int offset; 4683 if (layout != null) { 4684 if (mPreviousLineTouched == UNSET_LINE) { 4685 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4686 } 4687 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4688 offset = getOffsetAtCoordinate(layout, currLine, x); 4689 mPreviousLineTouched = currLine; 4690 } else { 4691 offset = -1; 4692 } 4693 positionAtCursorOffset(offset, false); 4694 if (mTextActionMode != null) { 4695 invalidateActionModeAsync(); 4696 } 4697 } 4698 4699 @Override 4700 void onHandleMoved() { 4701 super.onHandleMoved(); 4702 removeHiderCallback(); 4703 } 4704 4705 @Override 4706 public void onDetached() { 4707 super.onDetached(); 4708 removeHiderCallback(); 4709 } 4710 } 4711 4712 @Retention(RetentionPolicy.SOURCE) 4713 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4714 public @interface HandleType {} 4715 public static final int HANDLE_TYPE_SELECTION_START = 0; 4716 public static final int HANDLE_TYPE_SELECTION_END = 1; 4717 4718 private class SelectionHandleView extends HandleView { 4719 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4720 // end (HANDLE_TYPE_SELECTION_END). 4721 @HandleType 4722 private final int mHandleType; 4723 // Indicates whether the cursor is making adjustments within a word. 4724 private boolean mInWord = false; 4725 // Difference between touch position and word boundary position. 4726 private float mTouchWordDelta; 4727 // X value of the previous updatePosition call. 4728 private float mPrevX; 4729 // Indicates if the handle has moved a boundary between LTR and RTL text. 4730 private boolean mLanguageDirectionChanged = false; 4731 // Distance from edge of horizontally scrolling text view 4732 // to use to switch to character mode. 4733 private final float mTextViewEdgeSlop; 4734 // Used to save text view location. 4735 private final int[] mTextViewLocation = new int[2]; 4736 4737 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4738 @HandleType int handleType) { 4739 super(drawableLtr, drawableRtl, id); 4740 mHandleType = handleType; 4741 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4742 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4743 } 4744 4745 private boolean isStartHandle() { 4746 return mHandleType == HANDLE_TYPE_SELECTION_START; 4747 } 4748 4749 @Override 4750 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4751 if (isRtlRun == isStartHandle()) { 4752 return drawable.getIntrinsicWidth() / 4; 4753 } else { 4754 return (drawable.getIntrinsicWidth() * 3) / 4; 4755 } 4756 } 4757 4758 @Override 4759 protected int getHorizontalGravity(boolean isRtlRun) { 4760 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4761 } 4762 4763 @Override 4764 public int getCurrentCursorOffset() { 4765 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4766 } 4767 4768 @Override 4769 protected void updateSelection(int offset) { 4770 if (isStartHandle()) { 4771 Selection.setSelection((Spannable) mTextView.getText(), offset, 4772 mTextView.getSelectionEnd()); 4773 } else { 4774 Selection.setSelection((Spannable) mTextView.getText(), 4775 mTextView.getSelectionStart(), offset); 4776 } 4777 updateDrawable(); 4778 if (mTextActionMode != null) { 4779 invalidateActionModeAsync(); 4780 } 4781 } 4782 4783 @Override 4784 public void updatePosition(float x, float y) { 4785 final Layout layout = mTextView.getLayout(); 4786 if (layout == null) { 4787 // HandleView will deal appropriately in positionAtCursorOffset when 4788 // layout is null. 4789 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y)); 4790 return; 4791 } 4792 4793 if (mPreviousLineTouched == UNSET_LINE) { 4794 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4795 } 4796 4797 boolean positionCursor = false; 4798 final int anotherHandleOffset = 4799 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4800 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4801 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4802 4803 if (isStartHandle() && initialOffset >= anotherHandleOffset 4804 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4805 // Handles have crossed, bound it to the first selected line and 4806 // adjust by word / char as normal. 4807 currLine = getLineForOffset(layout, anotherHandleOffset, !isStartHandle()); 4808 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4809 } 4810 4811 int offset = initialOffset; 4812 final int wordEnd = getWordEnd(offset); 4813 final int wordStart = getWordStart(offset); 4814 4815 if (mPrevX == UNSET_X_VALUE) { 4816 mPrevX = x; 4817 } 4818 4819 final int currentOffset = getCurrentCursorOffset(); 4820 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4821 final boolean atRtl = isAtRtlRun(layout, offset); 4822 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4823 4824 // We can't determine if the user is expanding or shrinking the selection if they're 4825 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4826 // the cursor at the current position. 4827 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4828 // We're on a boundary or this is the first direction change -- just update 4829 // to the current position. 4830 mLanguageDirectionChanged = true; 4831 mTouchWordDelta = 0.0f; 4832 positionAndAdjustForCrossingHandles(offset); 4833 return; 4834 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4835 // We've just moved past the boundary so update the position. After this we can 4836 // figure out if the user is expanding or shrinking to go by word or character. 4837 positionAndAdjustForCrossingHandles(offset); 4838 mTouchWordDelta = 0.0f; 4839 mLanguageDirectionChanged = false; 4840 return; 4841 } 4842 4843 boolean isExpanding; 4844 final float xDiff = x - mPrevX; 4845 if (isStartHandle()) { 4846 isExpanding = currLine < mPreviousLineTouched; 4847 } else { 4848 isExpanding = currLine > mPreviousLineTouched; 4849 } 4850 if (atRtl == isStartHandle()) { 4851 isExpanding |= xDiff > 0; 4852 } else { 4853 isExpanding |= xDiff < 0; 4854 } 4855 4856 if (mTextView.getHorizontallyScrolling()) { 4857 if (positionNearEdgeOfScrollingView(x, atRtl) 4858 && ((isStartHandle() && mTextView.getScrollX() != 0) 4859 || (!isStartHandle() 4860 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4861 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4862 || (!isStartHandle() && offset > currentOffset))) 4863 || !isExpanding)) { 4864 // If we're expanding ensure that the offset is actually expanding compared to 4865 // the current offset, if the handle snapped to the word, the finger position 4866 // may be out of sync and we don't want the selection to jump back. 4867 mTouchWordDelta = 0.0f; 4868 final int nextOffset = (atRtl == isStartHandle()) 4869 ? layout.getOffsetToRightOf(mPreviousOffset) 4870 : layout.getOffsetToLeftOf(mPreviousOffset); 4871 positionAndAdjustForCrossingHandles(nextOffset); 4872 return; 4873 } 4874 } 4875 4876 if (isExpanding) { 4877 // User is increasing the selection. 4878 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4879 final boolean atLineBoundary = layout.getLineStart(currLine) == offset 4880 || layout.getLineEnd(currLine) == offset; 4881 final boolean atWordBoundary = getWordIteratorWithText().isBoundary(offset); 4882 final boolean snapToWord = !(atLineBoundary && atWordBoundary) 4883 && (!mInWord 4884 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4885 && atRtl == isAtRtlRun(layout, wordBoundary); 4886 if (snapToWord) { 4887 // Sometimes words can be broken across lines (Chinese, hyphenation). 4888 // We still snap to the word boundary but we only use the letters on the 4889 // current line to determine if the user is far enough into the word to snap. 4890 if (getLineForOffset(layout, wordBoundary) != currLine) { 4891 wordBoundary = isStartHandle() 4892 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4893 } 4894 final int offsetThresholdToSnap = isStartHandle() 4895 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4896 : wordStart + ((wordBoundary - wordStart) / 2); 4897 if (isStartHandle() 4898 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4899 // User is far enough into the word or on a different line so we expand by 4900 // word. 4901 offset = wordStart; 4902 } else if (!isStartHandle() 4903 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4904 // User is far enough into the word or on a different line so we expand by 4905 // word. 4906 offset = wordEnd; 4907 } else { 4908 offset = mPreviousOffset; 4909 } 4910 } 4911 if ((isStartHandle() && offset < initialOffset) 4912 || (!isStartHandle() && offset > initialOffset)) { 4913 final float adjustedX = getHorizontal(layout, offset); 4914 mTouchWordDelta = 4915 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4916 } else { 4917 mTouchWordDelta = 0.0f; 4918 } 4919 positionCursor = true; 4920 } else { 4921 final int adjustedOffset = 4922 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4923 final boolean shrinking = isStartHandle() 4924 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4925 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4926 if (shrinking) { 4927 // User is shrinking the selection. 4928 if (currLine != mPrevLine) { 4929 // We're on a different line, so we'll snap to word boundaries. 4930 offset = isStartHandle() ? wordStart : wordEnd; 4931 if ((isStartHandle() && offset < initialOffset) 4932 || (!isStartHandle() && offset > initialOffset)) { 4933 final float adjustedX = getHorizontal(layout, offset); 4934 mTouchWordDelta = 4935 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4936 } else { 4937 mTouchWordDelta = 0.0f; 4938 } 4939 } else { 4940 offset = adjustedOffset; 4941 } 4942 positionCursor = true; 4943 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4944 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4945 // Handle has jumped to the word boundary, and the user is moving 4946 // their finger towards the handle, the delta should be updated. 4947 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4948 - getHorizontal(layout, mPreviousOffset); 4949 } 4950 } 4951 4952 if (positionCursor) { 4953 mPreviousLineTouched = currLine; 4954 positionAndAdjustForCrossingHandles(offset); 4955 } 4956 mPrevX = x; 4957 } 4958 4959 @Override 4960 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4961 super.positionAtCursorOffset(offset, forceUpdatePosition); 4962 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 4963 } 4964 4965 @Override 4966 public boolean onTouchEvent(MotionEvent event) { 4967 boolean superResult = super.onTouchEvent(event); 4968 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 4969 // Reset the touch word offset and x value when the user 4970 // re-engages the handle. 4971 mTouchWordDelta = 0.0f; 4972 mPrevX = UNSET_X_VALUE; 4973 } 4974 return superResult; 4975 } 4976 4977 private void positionAndAdjustForCrossingHandles(int offset) { 4978 final int anotherHandleOffset = 4979 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4980 if ((isStartHandle() && offset >= anotherHandleOffset) 4981 || (!isStartHandle() && offset <= anotherHandleOffset)) { 4982 mTouchWordDelta = 0.0f; 4983 final Layout layout = mTextView.getLayout(); 4984 if (layout != null && offset != anotherHandleOffset) { 4985 final float horiz = getHorizontal(layout, offset); 4986 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 4987 !isStartHandle()); 4988 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 4989 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 4990 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 4991 // This handle passes another one as it crossed a direction boundary. 4992 // Don't minimize the selection, but keep the handle at the run boundary. 4993 final int currentOffset = getCurrentCursorOffset(); 4994 final int offsetToGetRunRange = isStartHandle() 4995 ? currentOffset : Math.max(currentOffset - 1, 0); 4996 final long range = layout.getRunRange(offsetToGetRunRange); 4997 if (isStartHandle()) { 4998 offset = TextUtils.unpackRangeStartFromLong(range); 4999 } else { 5000 offset = TextUtils.unpackRangeEndFromLong(range); 5001 } 5002 positionAtCursorOffset(offset, false); 5003 return; 5004 } 5005 } 5006 // Handles can not cross and selection is at least one character. 5007 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5008 } 5009 positionAtCursorOffset(offset, false); 5010 } 5011 5012 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5013 mTextView.getLocationOnScreen(mTextViewLocation); 5014 boolean nearEdge; 5015 if (atRtl == isStartHandle()) { 5016 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5017 - mTextView.getPaddingRight(); 5018 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5019 } else { 5020 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5021 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5022 } 5023 return nearEdge; 5024 } 5025 5026 @Override 5027 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5028 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5029 return layout.isRtlCharAt(offsetToCheck); 5030 } 5031 5032 @Override 5033 public float getHorizontal(@NonNull Layout layout, int offset) { 5034 return getHorizontal(layout, offset, isStartHandle()); 5035 } 5036 5037 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5038 final int line = getLineForOffset(layout, offset); 5039 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5040 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5041 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5042 return (isRtlChar == isRtlParagraph) 5043 ? layout.getPrimaryHorizontal(offset, false, startHandle) 5044 : layout.getSecondaryHorizontal(offset, false, startHandle); 5045 } 5046 5047 @Override 5048 public int getLineForOffset(@NonNull Layout layout, int offset) { 5049 return getLineForOffset(layout, offset, isStartHandle()); 5050 } 5051 5052 private int getLineForOffset(@NonNull Layout layout, int offset, boolean startHandle) { 5053 final int line = layout.getLineForOffset(offset); 5054 if (!startHandle && line > 0 && layout.getLineStart(line) == offset 5055 && mTextView.getText().charAt(offset - 1) != '\n') { 5056 // If end handle is at a line break in a paragraph, the handle should be at the 5057 // previous line. 5058 return line - 1; 5059 } 5060 return line; 5061 } 5062 5063 @Override 5064 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5065 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5066 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5067 if (!layout.isLevelBoundary(primaryOffset)) { 5068 return primaryOffset; 5069 } 5070 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5071 final int currentOffset = getCurrentCursorOffset(); 5072 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5073 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5074 if (primaryDiff < secondaryDiff) { 5075 return primaryOffset; 5076 } else if (primaryDiff > secondaryDiff) { 5077 return secondaryOffset; 5078 } else { 5079 final int offsetToCheck = isStartHandle() 5080 ? currentOffset : Math.max(currentOffset - 1, 0); 5081 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5082 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5083 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5084 } 5085 } 5086 } 5087 5088 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5089 final int trueLine = mTextView.getLineAtCoordinate(y); 5090 if (layout == null || prevLine > layout.getLineCount() 5091 || layout.getLineCount() <= 0 || prevLine < 0) { 5092 // Invalid parameters, just return whatever line is at y. 5093 return trueLine; 5094 } 5095 5096 if (Math.abs(trueLine - prevLine) >= 2) { 5097 // Only stick to lines if we're within a line of the previous selection. 5098 return trueLine; 5099 } 5100 5101 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5102 final int lineCount = layout.getLineCount(); 5103 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5104 5105 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5106 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5107 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5108 5109 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5110 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5111 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5112 5113 // Determine if we've moved lines based on y position and previous line. 5114 int currLine; 5115 if (y <= yTopBound) { 5116 currLine = Math.max(prevLine - 1, 0); 5117 } else if (y >= yBottomBound) { 5118 currLine = Math.min(prevLine + 1, lineCount - 1); 5119 } else { 5120 currLine = prevLine; 5121 } 5122 return currLine; 5123 } 5124 5125 /** 5126 * A CursorController instance can be used to control a cursor in the text. 5127 */ 5128 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5129 /** 5130 * Makes the cursor controller visible on screen. 5131 * See also {@link #hide()}. 5132 */ 5133 public void show(); 5134 5135 /** 5136 * Hide the cursor controller from screen. 5137 * See also {@link #show()}. 5138 */ 5139 public void hide(); 5140 5141 /** 5142 * Called when the view is detached from window. Perform house keeping task, such as 5143 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5144 * preventing the activity from being recycled. 5145 */ 5146 public void onDetached(); 5147 5148 public boolean isCursorBeingModified(); 5149 5150 public boolean isActive(); 5151 } 5152 5153 private class InsertionPointCursorController implements CursorController { 5154 private InsertionHandleView mHandle; 5155 5156 public void show() { 5157 getHandle().show(); 5158 5159 if (mSelectionModifierCursorController != null) { 5160 mSelectionModifierCursorController.hide(); 5161 } 5162 } 5163 5164 public void hide() { 5165 if (mHandle != null) { 5166 mHandle.hide(); 5167 } 5168 } 5169 5170 public void onTouchModeChanged(boolean isInTouchMode) { 5171 if (!isInTouchMode) { 5172 hide(); 5173 } 5174 } 5175 5176 private InsertionHandleView getHandle() { 5177 if (mSelectHandleCenter == null) { 5178 mSelectHandleCenter = mTextView.getContext().getDrawable( 5179 mTextView.mTextSelectHandleRes); 5180 } 5181 if (mHandle == null) { 5182 mHandle = new InsertionHandleView(mSelectHandleCenter); 5183 } 5184 return mHandle; 5185 } 5186 5187 @Override 5188 public void onDetached() { 5189 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5190 observer.removeOnTouchModeChangeListener(this); 5191 5192 if (mHandle != null) mHandle.onDetached(); 5193 } 5194 5195 @Override 5196 public boolean isCursorBeingModified() { 5197 return mHandle != null && mHandle.isDragging(); 5198 } 5199 5200 @Override 5201 public boolean isActive() { 5202 return mHandle != null && mHandle.isShowing(); 5203 } 5204 5205 public void invalidateHandle() { 5206 if (mHandle != null) { 5207 mHandle.invalidate(); 5208 } 5209 } 5210 } 5211 5212 class SelectionModifierCursorController implements CursorController { 5213 // The cursor controller handles, lazily created when shown. 5214 private SelectionHandleView mStartHandle; 5215 private SelectionHandleView mEndHandle; 5216 // The offsets of that last touch down event. Remembered to start selection there. 5217 private int mMinTouchOffset, mMaxTouchOffset; 5218 5219 private float mDownPositionX, mDownPositionY; 5220 private boolean mGestureStayedInTapRegion; 5221 5222 // Where the user first starts the drag motion. 5223 private int mStartOffset = -1; 5224 5225 private boolean mHaventMovedEnoughToStartDrag; 5226 // The line that a selection happened most recently with the drag accelerator. 5227 private int mLineSelectionIsOn = -1; 5228 // Whether the drag accelerator has selected past the initial line. 5229 private boolean mSwitchedLines = false; 5230 5231 // Indicates the drag accelerator mode that the user is currently using. 5232 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5233 // Drag accelerator is inactive. 5234 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5235 // Character based selection by dragging. Only for mouse. 5236 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5237 // Word based selection by dragging. Enabled after long pressing or double tapping. 5238 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5239 // Paragraph based selection by dragging. Enabled after mouse triple click. 5240 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5241 5242 SelectionModifierCursorController() { 5243 resetTouchOffsets(); 5244 } 5245 5246 public void show() { 5247 if (mTextView.isInBatchEditMode()) { 5248 return; 5249 } 5250 initDrawables(); 5251 initHandles(); 5252 } 5253 5254 private void initDrawables() { 5255 if (mSelectHandleLeft == null) { 5256 mSelectHandleLeft = mTextView.getContext().getDrawable( 5257 mTextView.mTextSelectHandleLeftRes); 5258 } 5259 if (mSelectHandleRight == null) { 5260 mSelectHandleRight = mTextView.getContext().getDrawable( 5261 mTextView.mTextSelectHandleRightRes); 5262 } 5263 } 5264 5265 private void initHandles() { 5266 // Lazy object creation has to be done before updatePosition() is called. 5267 if (mStartHandle == null) { 5268 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5269 com.android.internal.R.id.selection_start_handle, 5270 HANDLE_TYPE_SELECTION_START); 5271 } 5272 if (mEndHandle == null) { 5273 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5274 com.android.internal.R.id.selection_end_handle, 5275 HANDLE_TYPE_SELECTION_END); 5276 } 5277 5278 mStartHandle.show(); 5279 mEndHandle.show(); 5280 5281 hideInsertionPointCursorController(); 5282 } 5283 5284 public void hide() { 5285 if (mStartHandle != null) mStartHandle.hide(); 5286 if (mEndHandle != null) mEndHandle.hide(); 5287 } 5288 5289 public void enterDrag(int dragAcceleratorMode) { 5290 // Just need to init the handles / hide insertion cursor. 5291 show(); 5292 mDragAcceleratorMode = dragAcceleratorMode; 5293 // Start location of selection. 5294 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5295 mLastDownPositionY); 5296 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5297 // Don't show the handles until user has lifted finger. 5298 hide(); 5299 5300 // This stops scrolling parents from intercepting the touch event, allowing 5301 // the user to continue dragging across the screen to select text; TextView will 5302 // scroll as necessary. 5303 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5304 mTextView.cancelLongPress(); 5305 } 5306 5307 public void onTouchEvent(MotionEvent event) { 5308 // This is done even when the View does not have focus, so that long presses can start 5309 // selection and tap can move cursor from this tap position. 5310 final float eventX = event.getX(); 5311 final float eventY = event.getY(); 5312 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5313 switch (event.getActionMasked()) { 5314 case MotionEvent.ACTION_DOWN: 5315 if (extractedTextModeWillBeStarted()) { 5316 // Prevent duplicating the selection handles until the mode starts. 5317 hide(); 5318 } else { 5319 // Remember finger down position, to be able to start selection from there. 5320 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5321 eventX, eventY); 5322 5323 // Double tap detection 5324 if (mGestureStayedInTapRegion) { 5325 if (mTapState == TAP_STATE_DOUBLE_TAP 5326 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5327 final float deltaX = eventX - mDownPositionX; 5328 final float deltaY = eventY - mDownPositionY; 5329 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5330 5331 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5332 mTextView.getContext()); 5333 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5334 boolean stayedInArea = 5335 distanceSquared < doubleTapSlop * doubleTapSlop; 5336 5337 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5338 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5339 selectCurrentWordAndStartDrag(); 5340 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5341 selectCurrentParagraphAndStartDrag(); 5342 } 5343 mDiscardNextActionUp = true; 5344 } 5345 } 5346 } 5347 5348 mDownPositionX = eventX; 5349 mDownPositionY = eventY; 5350 mGestureStayedInTapRegion = true; 5351 mHaventMovedEnoughToStartDrag = true; 5352 } 5353 break; 5354 5355 case MotionEvent.ACTION_POINTER_DOWN: 5356 case MotionEvent.ACTION_POINTER_UP: 5357 // Handle multi-point gestures. Keep min and max offset positions. 5358 // Only activated for devices that correctly handle multi-touch. 5359 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5360 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5361 updateMinAndMaxOffsets(event); 5362 } 5363 break; 5364 5365 case MotionEvent.ACTION_MOVE: 5366 final ViewConfiguration viewConfig = ViewConfiguration.get( 5367 mTextView.getContext()); 5368 final int touchSlop = viewConfig.getScaledTouchSlop(); 5369 5370 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5371 final float deltaX = eventX - mDownPositionX; 5372 final float deltaY = eventY - mDownPositionY; 5373 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5374 5375 if (mGestureStayedInTapRegion) { 5376 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5377 mGestureStayedInTapRegion = 5378 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5379 } 5380 if (mHaventMovedEnoughToStartDrag) { 5381 // We don't start dragging until the user has moved enough. 5382 mHaventMovedEnoughToStartDrag = 5383 distanceSquared <= touchSlop * touchSlop; 5384 } 5385 } 5386 5387 if (isMouse && !isDragAcceleratorActive()) { 5388 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5389 if (mTextView.hasSelection() 5390 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5391 && offset >= mTextView.getSelectionStart() 5392 && offset <= mTextView.getSelectionEnd()) { 5393 startDragAndDrop(); 5394 break; 5395 } 5396 5397 if (mStartOffset != offset) { 5398 // Start character based drag accelerator. 5399 stopTextActionMode(); 5400 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5401 mDiscardNextActionUp = true; 5402 mHaventMovedEnoughToStartDrag = false; 5403 } 5404 } 5405 5406 if (mStartHandle != null && mStartHandle.isShowing()) { 5407 // Don't do the drag if the handles are showing already. 5408 break; 5409 } 5410 5411 updateSelection(event); 5412 break; 5413 5414 case MotionEvent.ACTION_UP: 5415 if (!isDragAcceleratorActive()) { 5416 break; 5417 } 5418 updateSelection(event); 5419 5420 // No longer dragging to select text, let the parent intercept events. 5421 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5422 5423 // No longer the first dragging motion, reset. 5424 resetDragAcceleratorState(); 5425 5426 if (mTextView.hasSelection()) { 5427 // Do not invoke the text assistant if this was a drag selection. 5428 if (mHaventMovedEnoughToStartDrag) { 5429 startSelectionActionModeAsync(); 5430 } else { 5431 startSelectionActionMode(); 5432 } 5433 5434 } 5435 break; 5436 } 5437 } 5438 5439 private void updateSelection(MotionEvent event) { 5440 if (mTextView.getLayout() != null) { 5441 switch (mDragAcceleratorMode) { 5442 case DRAG_ACCELERATOR_MODE_CHARACTER: 5443 updateCharacterBasedSelection(event); 5444 break; 5445 case DRAG_ACCELERATOR_MODE_WORD: 5446 updateWordBasedSelection(event); 5447 break; 5448 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5449 updateParagraphBasedSelection(event); 5450 break; 5451 } 5452 } 5453 } 5454 5455 /** 5456 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5457 * 5458 * @return true if the drag was started. 5459 */ 5460 private boolean selectCurrentParagraphAndStartDrag() { 5461 if (mInsertionActionModeRunnable != null) { 5462 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5463 } 5464 stopTextActionMode(); 5465 if (!selectCurrentParagraph()) { 5466 return false; 5467 } 5468 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5469 return true; 5470 } 5471 5472 private void updateCharacterBasedSelection(MotionEvent event) { 5473 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5474 Selection.setSelection((Spannable) mTextView.getText(), mStartOffset, offset); 5475 } 5476 5477 private void updateWordBasedSelection(MotionEvent event) { 5478 if (mHaventMovedEnoughToStartDrag) { 5479 return; 5480 } 5481 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5482 final ViewConfiguration viewConfig = ViewConfiguration.get( 5483 mTextView.getContext()); 5484 final float eventX = event.getX(); 5485 final float eventY = event.getY(); 5486 final int currLine; 5487 if (isMouse) { 5488 // No need to offset the y coordinate for mouse input. 5489 currLine = mTextView.getLineAtCoordinate(eventY); 5490 } else { 5491 float y = eventY; 5492 if (mSwitchedLines) { 5493 // Offset the finger by the same vertical offset as the handles. 5494 // This improves visibility of the content being selected by 5495 // shifting the finger below the content, this is applied once 5496 // the user has switched lines. 5497 final int touchSlop = viewConfig.getScaledTouchSlop(); 5498 final float fingerOffset = (mStartHandle != null) 5499 ? mStartHandle.getIdealVerticalOffset() 5500 : touchSlop; 5501 y = eventY - fingerOffset; 5502 } 5503 5504 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5505 y); 5506 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5507 // Break early here, we want to offset the finger position from 5508 // the selection highlight, once the user moved their finger 5509 // to a different line we should apply the offset and *not* switch 5510 // lines until recomputing the position with the finger offset. 5511 mSwitchedLines = true; 5512 return; 5513 } 5514 } 5515 5516 int startOffset; 5517 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5518 // Snap to word boundaries. 5519 if (mStartOffset < offset) { 5520 // Expanding with end handle. 5521 offset = getWordEnd(offset); 5522 startOffset = getWordStart(mStartOffset); 5523 } else { 5524 // Expanding with start handle. 5525 offset = getWordStart(offset); 5526 startOffset = getWordEnd(mStartOffset); 5527 if (startOffset == offset) { 5528 offset = getNextCursorOffset(offset, false); 5529 } 5530 } 5531 mLineSelectionIsOn = currLine; 5532 Selection.setSelection((Spannable) mTextView.getText(), startOffset, offset); 5533 } 5534 5535 private void updateParagraphBasedSelection(MotionEvent event) { 5536 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5537 5538 final int start = Math.min(offset, mStartOffset); 5539 final int end = Math.max(offset, mStartOffset); 5540 final long paragraphsRange = getParagraphsRange(start, end); 5541 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5542 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5543 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5544 } 5545 5546 /** 5547 * @param event 5548 */ 5549 private void updateMinAndMaxOffsets(MotionEvent event) { 5550 int pointerCount = event.getPointerCount(); 5551 for (int index = 0; index < pointerCount; index++) { 5552 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5553 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5554 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5555 } 5556 } 5557 5558 public int getMinTouchOffset() { 5559 return mMinTouchOffset; 5560 } 5561 5562 public int getMaxTouchOffset() { 5563 return mMaxTouchOffset; 5564 } 5565 5566 public void resetTouchOffsets() { 5567 mMinTouchOffset = mMaxTouchOffset = -1; 5568 resetDragAcceleratorState(); 5569 } 5570 5571 private void resetDragAcceleratorState() { 5572 mStartOffset = -1; 5573 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5574 mSwitchedLines = false; 5575 final int selectionStart = mTextView.getSelectionStart(); 5576 final int selectionEnd = mTextView.getSelectionEnd(); 5577 if (selectionStart > selectionEnd) { 5578 Selection.setSelection((Spannable) mTextView.getText(), 5579 selectionEnd, selectionStart); 5580 } 5581 } 5582 5583 /** 5584 * @return true iff this controller is currently used to move the selection start. 5585 */ 5586 public boolean isSelectionStartDragged() { 5587 return mStartHandle != null && mStartHandle.isDragging(); 5588 } 5589 5590 @Override 5591 public boolean isCursorBeingModified() { 5592 return isDragAcceleratorActive() || isSelectionStartDragged() 5593 || (mEndHandle != null && mEndHandle.isDragging()); 5594 } 5595 5596 /** 5597 * @return true if the user is selecting text using the drag accelerator. 5598 */ 5599 public boolean isDragAcceleratorActive() { 5600 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5601 } 5602 5603 public void onTouchModeChanged(boolean isInTouchMode) { 5604 if (!isInTouchMode) { 5605 hide(); 5606 } 5607 } 5608 5609 @Override 5610 public void onDetached() { 5611 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5612 observer.removeOnTouchModeChangeListener(this); 5613 5614 if (mStartHandle != null) mStartHandle.onDetached(); 5615 if (mEndHandle != null) mEndHandle.onDetached(); 5616 } 5617 5618 @Override 5619 public boolean isActive() { 5620 return mStartHandle != null && mStartHandle.isShowing(); 5621 } 5622 5623 public void invalidateHandles() { 5624 if (mStartHandle != null) { 5625 mStartHandle.invalidate(); 5626 } 5627 if (mEndHandle != null) { 5628 mEndHandle.invalidate(); 5629 } 5630 } 5631 } 5632 5633 private class CorrectionHighlighter { 5634 private final Path mPath = new Path(); 5635 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5636 private int mStart, mEnd; 5637 private long mFadingStartTime; 5638 private RectF mTempRectF; 5639 private static final int FADE_OUT_DURATION = 400; 5640 5641 public CorrectionHighlighter() { 5642 mPaint.setCompatibilityScaling( 5643 mTextView.getResources().getCompatibilityInfo().applicationScale); 5644 mPaint.setStyle(Paint.Style.FILL); 5645 } 5646 5647 public void highlight(CorrectionInfo info) { 5648 mStart = info.getOffset(); 5649 mEnd = mStart + info.getNewText().length(); 5650 mFadingStartTime = SystemClock.uptimeMillis(); 5651 5652 if (mStart < 0 || mEnd < 0) { 5653 stopAnimation(); 5654 } 5655 } 5656 5657 public void draw(Canvas canvas, int cursorOffsetVertical) { 5658 if (updatePath() && updatePaint()) { 5659 if (cursorOffsetVertical != 0) { 5660 canvas.translate(0, cursorOffsetVertical); 5661 } 5662 5663 canvas.drawPath(mPath, mPaint); 5664 5665 if (cursorOffsetVertical != 0) { 5666 canvas.translate(0, -cursorOffsetVertical); 5667 } 5668 invalidate(true); // TODO invalidate cursor region only 5669 } else { 5670 stopAnimation(); 5671 invalidate(false); // TODO invalidate cursor region only 5672 } 5673 } 5674 5675 private boolean updatePaint() { 5676 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5677 if (duration > FADE_OUT_DURATION) return false; 5678 5679 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5680 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5681 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5682 + ((int) (highlightColorAlpha * coef) << 24); 5683 mPaint.setColor(color); 5684 return true; 5685 } 5686 5687 private boolean updatePath() { 5688 final Layout layout = mTextView.getLayout(); 5689 if (layout == null) return false; 5690 5691 // Update in case text is edited while the animation is run 5692 final int length = mTextView.getText().length(); 5693 int start = Math.min(length, mStart); 5694 int end = Math.min(length, mEnd); 5695 5696 mPath.reset(); 5697 layout.getSelectionPath(start, end, mPath); 5698 return true; 5699 } 5700 5701 private void invalidate(boolean delayed) { 5702 if (mTextView.getLayout() == null) return; 5703 5704 if (mTempRectF == null) mTempRectF = new RectF(); 5705 mPath.computeBounds(mTempRectF, false); 5706 5707 int left = mTextView.getCompoundPaddingLeft(); 5708 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5709 5710 if (delayed) { 5711 mTextView.postInvalidateOnAnimation( 5712 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5713 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5714 } else { 5715 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5716 (int) mTempRectF.right, (int) mTempRectF.bottom); 5717 } 5718 } 5719 5720 private void stopAnimation() { 5721 Editor.this.mCorrectionHighlighter = null; 5722 } 5723 } 5724 5725 private static class ErrorPopup extends PopupWindow { 5726 private boolean mAbove = false; 5727 private final TextView mView; 5728 private int mPopupInlineErrorBackgroundId = 0; 5729 private int mPopupInlineErrorAboveBackgroundId = 0; 5730 5731 ErrorPopup(TextView v, int width, int height) { 5732 super(v, width, height); 5733 mView = v; 5734 // Make sure the TextView has a background set as it will be used the first time it is 5735 // shown and positioned. Initialized with below background, which should have 5736 // dimensions identical to the above version for this to work (and is more likely). 5737 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5738 com.android.internal.R.styleable.Theme_errorMessageBackground); 5739 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5740 } 5741 5742 void fixDirection(boolean above) { 5743 mAbove = above; 5744 5745 if (above) { 5746 mPopupInlineErrorAboveBackgroundId = 5747 getResourceId(mPopupInlineErrorAboveBackgroundId, 5748 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5749 } else { 5750 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5751 com.android.internal.R.styleable.Theme_errorMessageBackground); 5752 } 5753 5754 mView.setBackgroundResource( 5755 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5756 } 5757 5758 private int getResourceId(int currentId, int index) { 5759 if (currentId == 0) { 5760 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5761 R.styleable.Theme); 5762 currentId = styledAttributes.getResourceId(index, 0); 5763 styledAttributes.recycle(); 5764 } 5765 return currentId; 5766 } 5767 5768 @Override 5769 public void update(int x, int y, int w, int h, boolean force) { 5770 super.update(x, y, w, h, force); 5771 5772 boolean above = isAboveAnchor(); 5773 if (above != mAbove) { 5774 fixDirection(above); 5775 } 5776 } 5777 } 5778 5779 static class InputContentType { 5780 int imeOptions = EditorInfo.IME_NULL; 5781 String privateImeOptions; 5782 CharSequence imeActionLabel; 5783 int imeActionId; 5784 Bundle extras; 5785 OnEditorActionListener onEditorActionListener; 5786 boolean enterDown; 5787 LocaleList imeHintLocales; 5788 } 5789 5790 static class InputMethodState { 5791 ExtractedTextRequest mExtractedTextRequest; 5792 final ExtractedText mExtractedText = new ExtractedText(); 5793 int mBatchEditNesting; 5794 boolean mCursorChanged; 5795 boolean mSelectionModeChanged; 5796 boolean mContentChanged; 5797 int mChangedStart, mChangedEnd, mChangedDelta; 5798 } 5799 5800 /** 5801 * @return True iff (start, end) is a valid range within the text. 5802 */ 5803 private static boolean isValidRange(CharSequence text, int start, int end) { 5804 return 0 <= start && start <= end && end <= text.length(); 5805 } 5806 5807 @VisibleForTesting 5808 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5809 return mSuggestionsPopupWindow; 5810 } 5811 5812 /** 5813 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5814 * text being typed (and hence always returns null from the filter() method). 5815 * 5816 * TODO: Make this span aware. 5817 */ 5818 public static class UndoInputFilter implements InputFilter { 5819 private final Editor mEditor; 5820 5821 // Whether the current filter pass is directly caused by an end-user text edit. 5822 private boolean mIsUserEdit; 5823 5824 // Whether the text field is handling an IME composition. Must be parceled in case the user 5825 // rotates the screen during composition. 5826 private boolean mHasComposition; 5827 5828 // Whether the user is expanding or shortening the text 5829 private boolean mExpanding; 5830 5831 // Whether the previous edit operation was in the current batch edit. 5832 private boolean mPreviousOperationWasInSameBatchEdit; 5833 5834 public UndoInputFilter(Editor editor) { 5835 mEditor = editor; 5836 } 5837 5838 public void saveInstanceState(Parcel parcel) { 5839 parcel.writeInt(mIsUserEdit ? 1 : 0); 5840 parcel.writeInt(mHasComposition ? 1 : 0); 5841 parcel.writeInt(mExpanding ? 1 : 0); 5842 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5843 } 5844 5845 public void restoreInstanceState(Parcel parcel) { 5846 mIsUserEdit = parcel.readInt() != 0; 5847 mHasComposition = parcel.readInt() != 0; 5848 mExpanding = parcel.readInt() != 0; 5849 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5850 } 5851 5852 /** 5853 * Signals that a user-triggered edit is starting. 5854 */ 5855 public void beginBatchEdit() { 5856 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5857 mIsUserEdit = true; 5858 } 5859 5860 public void endBatchEdit() { 5861 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5862 mIsUserEdit = false; 5863 mPreviousOperationWasInSameBatchEdit = false; 5864 } 5865 5866 @Override 5867 public CharSequence filter(CharSequence source, int start, int end, 5868 Spanned dest, int dstart, int dend) { 5869 if (DEBUG_UNDO) { 5870 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 5871 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5872 } 5873 5874 // Check to see if this edit should be tracked for undo. 5875 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5876 return null; 5877 } 5878 5879 final boolean hadComposition = mHasComposition; 5880 mHasComposition = isComposition(source); 5881 final boolean wasExpanding = mExpanding; 5882 boolean shouldCreateSeparateState = false; 5883 if ((end - start) != (dend - dstart)) { 5884 mExpanding = (end - start) > (dend - dstart); 5885 if (hadComposition && mExpanding != wasExpanding) { 5886 shouldCreateSeparateState = true; 5887 } 5888 } 5889 5890 // Handle edit. 5891 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5892 return null; 5893 } 5894 5895 void freezeLastEdit() { 5896 mEditor.mUndoManager.beginUpdate("Edit text"); 5897 EditOperation lastEdit = getLastEdit(); 5898 if (lastEdit != null) { 5899 lastEdit.mFrozen = true; 5900 } 5901 mEditor.mUndoManager.endUpdate(); 5902 } 5903 5904 @Retention(RetentionPolicy.SOURCE) 5905 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5906 private @interface MergeMode {} 5907 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5908 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5909 /** Use {@link EditOperation#mergeWith} to merge */ 5910 private static final int MERGE_EDIT_MODE_NORMAL = 2; 5911 5912 private void handleEdit(CharSequence source, int start, int end, 5913 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5914 // An application may install a TextWatcher to provide additional modifications after 5915 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5916 // string). This results in multiple filter() calls for what the user considers to be 5917 // a single operation. Always undo the whole set of changes in one step. 5918 @MergeMode 5919 final int mergeMode; 5920 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5921 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5922 } else if (shouldCreateSeparateState) { 5923 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5924 } else { 5925 mergeMode = MERGE_EDIT_MODE_NORMAL; 5926 } 5927 // Build a new operation with all the information from this edit. 5928 String newText = TextUtils.substring(source, start, end); 5929 String oldText = TextUtils.substring(dest, dstart, dend); 5930 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5931 mHasComposition); 5932 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5933 return; 5934 } 5935 recordEdit(edit, mergeMode); 5936 } 5937 5938 private EditOperation getLastEdit() { 5939 final UndoManager um = mEditor.mUndoManager; 5940 return um.getLastOperation( 5941 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5942 } 5943 /** 5944 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5945 * If forceMerge is true then the new edit is always merged. 5946 */ 5947 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5948 // Fetch the last edit operation and attempt to merge in the new edit. 5949 final UndoManager um = mEditor.mUndoManager; 5950 um.beginUpdate("Edit text"); 5951 EditOperation lastEdit = getLastEdit(); 5952 if (lastEdit == null) { 5953 // Add this as the first edit. 5954 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5955 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5956 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5957 // Forced merges take priority because they could be the result of a non-user-edit 5958 // change and this case should not create a new undo operation. 5959 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5960 lastEdit.forceMergeWith(edit); 5961 } else if (!mIsUserEdit) { 5962 // An application directly modified the Editable outside of a text edit. Treat this 5963 // as a new change and don't attempt to merge. 5964 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5965 um.commitState(mEditor.mUndoOwner); 5966 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5967 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 5968 // Merge succeeded, nothing else to do. 5969 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5970 } else { 5971 // Could not merge with the last edit, so commit the last edit and add this edit. 5972 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5973 um.commitState(mEditor.mUndoOwner); 5974 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5975 } 5976 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 5977 um.endUpdate(); 5978 } 5979 5980 private boolean canUndoEdit(CharSequence source, int start, int end, 5981 Spanned dest, int dstart, int dend) { 5982 if (!mEditor.mAllowUndo) { 5983 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5984 return false; 5985 } 5986 5987 if (mEditor.mUndoManager.isInUndo()) { 5988 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5989 return false; 5990 } 5991 5992 // Text filters run before input operations are applied. However, some input operations 5993 // are invalid and will throw exceptions when applied. This is common in tests. Don't 5994 // attempt to undo invalid operations. 5995 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 5996 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 5997 return false; 5998 } 5999 6000 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 6001 // on an input field. Skip no-op changes. 6002 if (start == end && dstart == dend) { 6003 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 6004 return false; 6005 } 6006 6007 return true; 6008 } 6009 6010 private static boolean isComposition(CharSequence source) { 6011 if (!(source instanceof Spannable)) { 6012 return false; 6013 } 6014 // This is a composition edit if the source has a non-zero-length composing span. 6015 Spannable text = (Spannable) source; 6016 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6017 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6018 return composeBegin < composeEnd; 6019 } 6020 6021 private boolean isInTextWatcher() { 6022 CharSequence text = mEditor.mTextView.getText(); 6023 return (text instanceof SpannableStringBuilder) 6024 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6025 } 6026 } 6027 6028 /** 6029 * An operation to undo a single "edit" to a text view. 6030 */ 6031 public static class EditOperation extends UndoOperation<Editor> { 6032 private static final int TYPE_INSERT = 0; 6033 private static final int TYPE_DELETE = 1; 6034 private static final int TYPE_REPLACE = 2; 6035 6036 private int mType; 6037 private String mOldText; 6038 private String mNewText; 6039 private int mStart; 6040 6041 private int mOldCursorPos; 6042 private int mNewCursorPos; 6043 private boolean mFrozen; 6044 private boolean mIsComposition; 6045 6046 /** 6047 * Constructs an edit operation from a text input operation on editor that replaces the 6048 * oldText starting at dstart with newText. 6049 */ 6050 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6051 boolean isComposition) { 6052 super(editor.mUndoOwner); 6053 mOldText = oldText; 6054 mNewText = newText; 6055 6056 // Determine the type of the edit. 6057 if (mNewText.length() > 0 && mOldText.length() == 0) { 6058 mType = TYPE_INSERT; 6059 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6060 mType = TYPE_DELETE; 6061 } else { 6062 mType = TYPE_REPLACE; 6063 } 6064 6065 mStart = dstart; 6066 // Store cursor data. 6067 mOldCursorPos = editor.mTextView.getSelectionStart(); 6068 mNewCursorPos = dstart + mNewText.length(); 6069 mIsComposition = isComposition; 6070 } 6071 6072 public EditOperation(Parcel src, ClassLoader loader) { 6073 super(src, loader); 6074 mType = src.readInt(); 6075 mOldText = src.readString(); 6076 mNewText = src.readString(); 6077 mStart = src.readInt(); 6078 mOldCursorPos = src.readInt(); 6079 mNewCursorPos = src.readInt(); 6080 mFrozen = src.readInt() == 1; 6081 mIsComposition = src.readInt() == 1; 6082 } 6083 6084 @Override 6085 public void writeToParcel(Parcel dest, int flags) { 6086 dest.writeInt(mType); 6087 dest.writeString(mOldText); 6088 dest.writeString(mNewText); 6089 dest.writeInt(mStart); 6090 dest.writeInt(mOldCursorPos); 6091 dest.writeInt(mNewCursorPos); 6092 dest.writeInt(mFrozen ? 1 : 0); 6093 dest.writeInt(mIsComposition ? 1 : 0); 6094 } 6095 6096 private int getNewTextEnd() { 6097 return mStart + mNewText.length(); 6098 } 6099 6100 private int getOldTextEnd() { 6101 return mStart + mOldText.length(); 6102 } 6103 6104 @Override 6105 public void commit() { 6106 } 6107 6108 @Override 6109 public void undo() { 6110 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6111 // Remove the new text and insert the old. 6112 Editor editor = getOwnerData(); 6113 Editable text = (Editable) editor.mTextView.getText(); 6114 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6115 } 6116 6117 @Override 6118 public void redo() { 6119 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6120 // Remove the old text and insert the new. 6121 Editor editor = getOwnerData(); 6122 Editable text = (Editable) editor.mTextView.getText(); 6123 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6124 } 6125 6126 /** 6127 * Attempts to merge this existing operation with a new edit. 6128 * @param edit The new edit operation. 6129 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6130 * object unchanged. 6131 */ 6132 private boolean mergeWith(EditOperation edit) { 6133 if (DEBUG_UNDO) { 6134 Log.d(TAG, "mergeWith old " + this); 6135 Log.d(TAG, "mergeWith new " + edit); 6136 } 6137 6138 if (mFrozen) { 6139 return false; 6140 } 6141 6142 switch (mType) { 6143 case TYPE_INSERT: 6144 return mergeInsertWith(edit); 6145 case TYPE_DELETE: 6146 return mergeDeleteWith(edit); 6147 case TYPE_REPLACE: 6148 return mergeReplaceWith(edit); 6149 default: 6150 return false; 6151 } 6152 } 6153 6154 private boolean mergeInsertWith(EditOperation edit) { 6155 if (edit.mType == TYPE_INSERT) { 6156 // Merge insertions that are contiguous even when it's frozen. 6157 if (getNewTextEnd() != edit.mStart) { 6158 return false; 6159 } 6160 mNewText += edit.mNewText; 6161 mNewCursorPos = edit.mNewCursorPos; 6162 mFrozen = edit.mFrozen; 6163 mIsComposition = edit.mIsComposition; 6164 return true; 6165 } 6166 if (mIsComposition && edit.mType == TYPE_REPLACE 6167 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6168 // Merge insertion with replace as they can be single insertion. 6169 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6170 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6171 mNewCursorPos = edit.mNewCursorPos; 6172 mIsComposition = edit.mIsComposition; 6173 return true; 6174 } 6175 return false; 6176 } 6177 6178 // TODO: Support forward delete. 6179 private boolean mergeDeleteWith(EditOperation edit) { 6180 // Only merge continuous deletes. 6181 if (edit.mType != TYPE_DELETE) { 6182 return false; 6183 } 6184 // Only merge deletions that are contiguous. 6185 if (mStart != edit.getOldTextEnd()) { 6186 return false; 6187 } 6188 mStart = edit.mStart; 6189 mOldText = edit.mOldText + mOldText; 6190 mNewCursorPos = edit.mNewCursorPos; 6191 mIsComposition = edit.mIsComposition; 6192 return true; 6193 } 6194 6195 private boolean mergeReplaceWith(EditOperation edit) { 6196 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6197 // Merge with adjacent insert. 6198 mNewText += edit.mNewText; 6199 mNewCursorPos = edit.mNewCursorPos; 6200 return true; 6201 } 6202 if (!mIsComposition) { 6203 return false; 6204 } 6205 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6206 && getNewTextEnd() >= edit.getOldTextEnd()) { 6207 // Merge with delete as they can be single operation. 6208 mNewText = mNewText.substring(0, edit.mStart - mStart) 6209 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6210 if (mNewText.isEmpty()) { 6211 mType = TYPE_DELETE; 6212 } 6213 mNewCursorPos = edit.mNewCursorPos; 6214 mIsComposition = edit.mIsComposition; 6215 return true; 6216 } 6217 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6218 && TextUtils.equals(mNewText, edit.mOldText)) { 6219 // Merge with the replace that replaces the same region. 6220 mNewText = edit.mNewText; 6221 mNewCursorPos = edit.mNewCursorPos; 6222 mIsComposition = edit.mIsComposition; 6223 return true; 6224 } 6225 return false; 6226 } 6227 6228 /** 6229 * Forcibly creates a single merged edit operation by simulating the entire text 6230 * contents being replaced. 6231 */ 6232 public void forceMergeWith(EditOperation edit) { 6233 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6234 if (mergeWith(edit)) { 6235 return; 6236 } 6237 Editor editor = getOwnerData(); 6238 6239 // Copy the text of the current field. 6240 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6241 // but would require two parallel implementations of modifyText() because Editable and 6242 // StringBuilder do not share an interface for replace/delete/insert. 6243 Editable editable = (Editable) editor.mTextView.getText(); 6244 Editable originalText = new SpannableStringBuilder(editable.toString()); 6245 6246 // Roll back the last operation. 6247 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6248 6249 // Clone the text again and apply the new operation. 6250 Editable finalText = new SpannableStringBuilder(editable.toString()); 6251 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6252 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6253 6254 // Convert this operation into a replace operation. 6255 mType = TYPE_REPLACE; 6256 mNewText = finalText.toString(); 6257 mOldText = originalText.toString(); 6258 mStart = 0; 6259 mNewCursorPos = edit.mNewCursorPos; 6260 mIsComposition = edit.mIsComposition; 6261 // mOldCursorPos is unchanged. 6262 } 6263 6264 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6265 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6266 // Apply the edit if it is still valid. 6267 if (isValidRange(text, deleteFrom, deleteTo) 6268 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6269 if (deleteFrom != deleteTo) { 6270 text.delete(deleteFrom, deleteTo); 6271 } 6272 if (newText.length() != 0) { 6273 text.insert(newTextInsertAt, newText); 6274 } 6275 } 6276 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6277 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6278 // TODO: Select all the text that was undone. 6279 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6280 Selection.setSelection(text, newCursorPos); 6281 } 6282 } 6283 6284 private String getTypeString() { 6285 switch (mType) { 6286 case TYPE_INSERT: 6287 return "insert"; 6288 case TYPE_DELETE: 6289 return "delete"; 6290 case TYPE_REPLACE: 6291 return "replace"; 6292 default: 6293 return ""; 6294 } 6295 } 6296 6297 @Override 6298 public String toString() { 6299 return "[mType=" + getTypeString() + ", " 6300 + "mOldText=" + mOldText + ", " 6301 + "mNewText=" + mNewText + ", " 6302 + "mStart=" + mStart + ", " 6303 + "mOldCursorPos=" + mOldCursorPos + ", " 6304 + "mNewCursorPos=" + mNewCursorPos + ", " 6305 + "mFrozen=" + mFrozen + ", " 6306 + "mIsComposition=" + mIsComposition + "]"; 6307 } 6308 6309 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6310 new Parcelable.ClassLoaderCreator<EditOperation>() { 6311 @Override 6312 public EditOperation createFromParcel(Parcel in) { 6313 return new EditOperation(in, null); 6314 } 6315 6316 @Override 6317 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6318 return new EditOperation(in, loader); 6319 } 6320 6321 @Override 6322 public EditOperation[] newArray(int size) { 6323 return new EditOperation[size]; 6324 } 6325 }; 6326 } 6327 6328 /** 6329 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6330 * These allow external applications to plug into currently selected text. 6331 */ 6332 static final class ProcessTextIntentActionsHandler { 6333 6334 private final Editor mEditor; 6335 private final TextView mTextView; 6336 private final Context mContext; 6337 private final PackageManager mPackageManager; 6338 private final String mPackageName; 6339 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6340 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6341 new SparseArray<>(); 6342 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6343 6344 private ProcessTextIntentActionsHandler(Editor editor) { 6345 mEditor = Preconditions.checkNotNull(editor); 6346 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6347 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6348 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6349 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6350 } 6351 6352 /** 6353 * Adds "PROCESS_TEXT" menu items to the specified menu. 6354 */ 6355 public void onInitializeMenu(Menu menu) { 6356 int i = 0; 6357 loadSupportedActivities(); 6358 for (ResolveInfo resolveInfo : mSupportedActivities) { 6359 menu.add(Menu.NONE, Menu.NONE, 6360 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6361 getLabel(resolveInfo)) 6362 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6363 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6364 } 6365 } 6366 6367 /** 6368 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6369 * menu item. 6370 * 6371 * @return True if the action was performed, false otherwise. 6372 */ 6373 public boolean performMenuItemAction(MenuItem item) { 6374 return fireIntent(item.getIntent()); 6375 } 6376 6377 /** 6378 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6379 */ 6380 public void initializeAccessibilityActions() { 6381 mAccessibilityIntents.clear(); 6382 mAccessibilityActions.clear(); 6383 int i = 0; 6384 loadSupportedActivities(); 6385 for (ResolveInfo resolveInfo : mSupportedActivities) { 6386 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6387 mAccessibilityActions.put( 6388 actionId, 6389 new AccessibilityNodeInfo.AccessibilityAction( 6390 actionId, getLabel(resolveInfo))); 6391 mAccessibilityIntents.put( 6392 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6393 } 6394 } 6395 6396 /** 6397 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6398 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6399 * latest accessibility actions available for this call. 6400 */ 6401 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6402 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6403 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6404 } 6405 } 6406 6407 /** 6408 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6409 * accessibility action id. 6410 * 6411 * @return True if the action was performed, false otherwise. 6412 */ 6413 public boolean performAccessibilityAction(int actionId) { 6414 return fireIntent(mAccessibilityIntents.get(actionId)); 6415 } 6416 6417 private boolean fireIntent(Intent intent) { 6418 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6419 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 6420 mEditor.mPreserveSelection = true; 6421 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6422 return true; 6423 } 6424 return false; 6425 } 6426 6427 private void loadSupportedActivities() { 6428 mSupportedActivities.clear(); 6429 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6430 List<ResolveInfo> unfiltered = 6431 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6432 for (ResolveInfo info : unfiltered) { 6433 if (isSupportedActivity(info)) { 6434 mSupportedActivities.add(info); 6435 } 6436 } 6437 } 6438 6439 private boolean isSupportedActivity(ResolveInfo info) { 6440 return mPackageName.equals(info.activityInfo.packageName) 6441 || info.activityInfo.exported 6442 && (info.activityInfo.permission == null 6443 || mContext.checkSelfPermission(info.activityInfo.permission) 6444 == PackageManager.PERMISSION_GRANTED); 6445 } 6446 6447 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6448 return createProcessTextIntent() 6449 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6450 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6451 } 6452 6453 private Intent createProcessTextIntent() { 6454 return new Intent() 6455 .setAction(Intent.ACTION_PROCESS_TEXT) 6456 .setType("text/plain"); 6457 } 6458 6459 private CharSequence getLabel(ResolveInfo resolveInfo) { 6460 return resolveInfo.loadLabel(mPackageManager); 6461 } 6462 } 6463} 6464