Editor.java revision e06eebf48096838bf3143042950ea191db8d7c06
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.IntDef; 21import android.annotation.NonNull; 22import android.annotation.Nullable; 23import android.app.PendingIntent; 24import android.app.PendingIntent.CanceledException; 25import android.content.ClipData; 26import android.content.ClipData.Item; 27import android.content.Context; 28import android.content.Intent; 29import android.content.UndoManager; 30import android.content.UndoOperation; 31import android.content.UndoOwner; 32import android.content.pm.PackageManager; 33import android.content.pm.ResolveInfo; 34import android.content.res.TypedArray; 35import android.graphics.Canvas; 36import android.graphics.Color; 37import android.graphics.Matrix; 38import android.graphics.Paint; 39import android.graphics.Path; 40import android.graphics.Rect; 41import android.graphics.RectF; 42import android.graphics.drawable.ColorDrawable; 43import android.graphics.drawable.Drawable; 44import android.metrics.LogMaker; 45import android.os.Bundle; 46import android.os.LocaleList; 47import android.os.Parcel; 48import android.os.Parcelable; 49import android.os.ParcelableParcel; 50import android.os.SystemClock; 51import android.provider.Settings; 52import android.text.DynamicLayout; 53import android.text.Editable; 54import android.text.InputFilter; 55import android.text.InputType; 56import android.text.Layout; 57import android.text.ParcelableSpan; 58import android.text.Selection; 59import android.text.SpanWatcher; 60import android.text.Spannable; 61import android.text.SpannableStringBuilder; 62import android.text.Spanned; 63import android.text.StaticLayout; 64import android.text.TextUtils; 65import android.text.method.KeyListener; 66import android.text.method.MetaKeyKeyListener; 67import android.text.method.MovementMethod; 68import android.text.method.WordIterator; 69import android.text.style.EasyEditSpan; 70import android.text.style.SuggestionRangeSpan; 71import android.text.style.SuggestionSpan; 72import android.text.style.TextAppearanceSpan; 73import android.text.style.URLSpan; 74import android.util.ArraySet; 75import android.util.DisplayMetrics; 76import android.util.Log; 77import android.util.SparseArray; 78import android.view.ActionMode; 79import android.view.ActionMode.Callback; 80import android.view.ContextMenu; 81import android.view.ContextThemeWrapper; 82import android.view.DisplayListCanvas; 83import android.view.DragAndDropPermissions; 84import android.view.DragEvent; 85import android.view.Gravity; 86import android.view.HapticFeedbackConstants; 87import android.view.InputDevice; 88import android.view.LayoutInflater; 89import android.view.Menu; 90import android.view.MenuItem; 91import android.view.MotionEvent; 92import android.view.RenderNode; 93import android.view.SubMenu; 94import android.view.View; 95import android.view.View.DragShadowBuilder; 96import android.view.View.OnClickListener; 97import android.view.ViewConfiguration; 98import android.view.ViewGroup; 99import android.view.ViewGroup.LayoutParams; 100import android.view.ViewTreeObserver; 101import android.view.WindowManager; 102import android.view.accessibility.AccessibilityNodeInfo; 103import android.view.inputmethod.CorrectionInfo; 104import android.view.inputmethod.CursorAnchorInfo; 105import android.view.inputmethod.EditorInfo; 106import android.view.inputmethod.ExtractedText; 107import android.view.inputmethod.ExtractedTextRequest; 108import android.view.inputmethod.InputConnection; 109import android.view.inputmethod.InputMethodManager; 110import android.view.textclassifier.TextClassification; 111import android.widget.AdapterView.OnItemClickListener; 112import android.widget.TextView.Drawables; 113import android.widget.TextView.OnEditorActionListener; 114 115import com.android.internal.annotations.VisibleForTesting; 116import com.android.internal.logging.MetricsLogger; 117import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 118import com.android.internal.util.ArrayUtils; 119import com.android.internal.util.GrowingArrayUtils; 120import com.android.internal.util.Preconditions; 121import com.android.internal.widget.EditableInputConnection; 122 123import java.lang.annotation.Retention; 124import java.lang.annotation.RetentionPolicy; 125import java.text.BreakIterator; 126import java.util.ArrayList; 127import java.util.Arrays; 128import java.util.Comparator; 129import java.util.HashMap; 130import java.util.List; 131 132 133/** 134 * Helper class used by TextView to handle editable text views. 135 * 136 * @hide 137 */ 138public class Editor { 139 private static final String TAG = "Editor"; 140 private static final boolean DEBUG_UNDO = false; 141 142 static final int BLINK = 500; 143 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 144 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 145 private static final int UNSET_X_VALUE = -1; 146 private static final int UNSET_LINE = -1; 147 // Tag used when the Editor maintains its own separate UndoManager. 148 private static final String UNDO_OWNER_TAG = "Editor"; 149 150 // Ordering constants used to place the Action Mode or context menu items in their menu. 151 private static final int MENU_ITEM_ORDER_ASSIST = 0; 152 private static final int MENU_ITEM_ORDER_UNDO = 2; 153 private static final int MENU_ITEM_ORDER_REDO = 3; 154 private static final int MENU_ITEM_ORDER_CUT = 4; 155 private static final int MENU_ITEM_ORDER_COPY = 5; 156 private static final int MENU_ITEM_ORDER_PASTE = 6; 157 private static final int MENU_ITEM_ORDER_SHARE = 7; 158 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 159 private static final int MENU_ITEM_ORDER_REPLACE = 9; 160 private static final int MENU_ITEM_ORDER_AUTOFILL = 10; 161 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 11; 162 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 163 164 // Each Editor manages its own undo stack. 165 private final UndoManager mUndoManager = new UndoManager(); 166 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 167 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 168 boolean mAllowUndo = true; 169 170 private final MetricsLogger mMetricsLogger = new MetricsLogger(); 171 172 // Cursor Controllers. 173 private InsertionPointCursorController mInsertionPointCursorController; 174 SelectionModifierCursorController mSelectionModifierCursorController; 175 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 176 private ActionMode mTextActionMode; 177 private boolean mInsertionControllerEnabled; 178 private boolean mSelectionControllerEnabled; 179 180 private final boolean mHapticTextHandleEnabled; 181 182 // Used to highlight a word when it is corrected by the IME 183 private CorrectionHighlighter mCorrectionHighlighter; 184 185 InputContentType mInputContentType; 186 InputMethodState mInputMethodState; 187 188 private static class TextRenderNode { 189 // Render node has 3 recording states: 190 // 1. Recorded operations are valid. 191 // #needsRecord() returns false, but needsToBeShifted is false. 192 // 2. Recorded operations are not valid, but just the position needed to be updated. 193 // #needsRecord() returns false, but needsToBeShifted is true. 194 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 195 // true. 196 RenderNode renderNode; 197 boolean isDirty; 198 // Becomes true when recorded operations can be reused, but the position has to be updated. 199 boolean needsToBeShifted; 200 public TextRenderNode(String name) { 201 renderNode = RenderNode.create(name, null); 202 isDirty = true; 203 needsToBeShifted = true; 204 } 205 boolean needsRecord() { 206 return isDirty || !renderNode.isValid(); 207 } 208 } 209 private TextRenderNode[] mTextRenderNodes; 210 211 boolean mFrozenWithFocus; 212 boolean mSelectionMoved; 213 boolean mTouchFocusSelected; 214 215 KeyListener mKeyListener; 216 int mInputType = EditorInfo.TYPE_NULL; 217 218 boolean mDiscardNextActionUp; 219 boolean mIgnoreActionUpEvent; 220 221 long mShowCursor; 222 private Blink mBlink; 223 224 boolean mCursorVisible = true; 225 boolean mSelectAllOnFocus; 226 boolean mTextIsSelectable; 227 228 CharSequence mError; 229 boolean mErrorWasChanged; 230 private ErrorPopup mErrorPopup; 231 232 /** 233 * This flag is set if the TextView tries to display an error before it 234 * is attached to the window (so its position is still unknown). 235 * It causes the error to be shown later, when onAttachedToWindow() 236 * is called. 237 */ 238 private boolean mShowErrorAfterAttach; 239 240 boolean mInBatchEditControllers; 241 boolean mShowSoftInputOnFocus = true; 242 private boolean mPreserveSelection; 243 private boolean mRestartActionModeOnNextRefresh; 244 245 private SelectionActionModeHelper mSelectionActionModeHelper; 246 247 boolean mIsBeingLongClicked; 248 249 private SuggestionsPopupWindow mSuggestionsPopupWindow; 250 SuggestionRangeSpan mSuggestionRangeSpan; 251 private Runnable mShowSuggestionRunnable; 252 253 Drawable mDrawableForCursor = null; 254 255 private Drawable mSelectHandleLeft; 256 private Drawable mSelectHandleRight; 257 private Drawable mSelectHandleCenter; 258 259 // Global listener that detects changes in the global position of the TextView 260 private PositionListener mPositionListener; 261 262 private float mLastDownPositionX, mLastDownPositionY; 263 private float mLastUpPositionX, mLastUpPositionY; 264 private float mContextMenuAnchorX, mContextMenuAnchorY; 265 Callback mCustomSelectionActionModeCallback; 266 Callback mCustomInsertionActionModeCallback; 267 268 // Set when this TextView gained focus with some text selected. Will start selection mode. 269 boolean mCreatedWithASelection; 270 271 // Indicates the current tap state (first tap, double tap, or triple click). 272 private int mTapState = TAP_STATE_INITIAL; 273 private long mLastTouchUpTime = 0; 274 private static final int TAP_STATE_INITIAL = 0; 275 private static final int TAP_STATE_FIRST_TAP = 1; 276 private static final int TAP_STATE_DOUBLE_TAP = 2; 277 // Only for mouse input. 278 private static final int TAP_STATE_TRIPLE_CLICK = 3; 279 280 // The button state as of the last time #onTouchEvent is called. 281 private int mLastButtonState; 282 283 private Runnable mInsertionActionModeRunnable; 284 285 // The span controller helps monitoring the changes to which the Editor needs to react: 286 // - EasyEditSpans, for which we have some UI to display on attach and on hide 287 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 288 private SpanController mSpanController; 289 290 private WordIterator mWordIterator; 291 SpellChecker mSpellChecker; 292 293 // This word iterator is set with text and used to determine word boundaries 294 // when a user is selecting text. 295 private WordIterator mWordIteratorWithText; 296 // Indicate that the text in the word iterator needs to be updated. 297 private boolean mUpdateWordIteratorText; 298 299 private Rect mTempRect; 300 301 private final TextView mTextView; 302 303 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 304 305 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 306 new CursorAnchorInfoNotifier(); 307 308 private final Runnable mShowFloatingToolbar = new Runnable() { 309 @Override 310 public void run() { 311 if (mTextActionMode != null) { 312 mTextActionMode.hide(0); // hide off. 313 } 314 } 315 }; 316 317 boolean mIsInsertionActionModeStartPending = false; 318 319 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 320 321 Editor(TextView textView) { 322 mTextView = textView; 323 // Synchronize the filter list, which places the undo input filter at the end. 324 mTextView.setFilters(mTextView.getFilters()); 325 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 326 mHapticTextHandleEnabled = mTextView.getContext().getResources().getBoolean( 327 com.android.internal.R.bool.config_enableHapticTextHandle); 328 } 329 330 ParcelableParcel saveInstanceState() { 331 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 332 Parcel parcel = state.getParcel(); 333 mUndoManager.saveInstanceState(parcel); 334 mUndoInputFilter.saveInstanceState(parcel); 335 return state; 336 } 337 338 void restoreInstanceState(ParcelableParcel state) { 339 Parcel parcel = state.getParcel(); 340 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 341 mUndoInputFilter.restoreInstanceState(parcel); 342 // Re-associate this object as the owner of undo state. 343 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 344 } 345 346 /** 347 * Forgets all undo and redo operations for this Editor. 348 */ 349 void forgetUndoRedo() { 350 UndoOwner[] owners = { mUndoOwner }; 351 mUndoManager.forgetUndos(owners, -1 /* all */); 352 mUndoManager.forgetRedos(owners, -1 /* all */); 353 } 354 355 boolean canUndo() { 356 UndoOwner[] owners = { mUndoOwner }; 357 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 358 } 359 360 boolean canRedo() { 361 UndoOwner[] owners = { mUndoOwner }; 362 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 363 } 364 365 void undo() { 366 if (!mAllowUndo) { 367 return; 368 } 369 UndoOwner[] owners = { mUndoOwner }; 370 mUndoManager.undo(owners, 1); // Undo 1 action. 371 } 372 373 void redo() { 374 if (!mAllowUndo) { 375 return; 376 } 377 UndoOwner[] owners = { mUndoOwner }; 378 mUndoManager.redo(owners, 1); // Redo 1 action. 379 } 380 381 void replace() { 382 if (mSuggestionsPopupWindow == null) { 383 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 384 } 385 hideCursorAndSpanControllers(); 386 mSuggestionsPopupWindow.show(); 387 388 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 389 Selection.setSelection((Spannable) mTextView.getText(), middle); 390 } 391 392 void onAttachedToWindow() { 393 if (mShowErrorAfterAttach) { 394 showError(); 395 mShowErrorAfterAttach = false; 396 } 397 398 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 399 // No need to create the controller. 400 // The get method will add the listener on controller creation. 401 if (mInsertionPointCursorController != null) { 402 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 403 } 404 if (mSelectionModifierCursorController != null) { 405 mSelectionModifierCursorController.resetTouchOffsets(); 406 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 407 } 408 updateSpellCheckSpans(0, mTextView.getText().length(), 409 true /* create the spell checker if needed */); 410 411 if (mTextView.hasSelection()) { 412 refreshTextActionMode(); 413 } 414 415 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 416 resumeBlink(); 417 } 418 419 void onDetachedFromWindow() { 420 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 421 422 if (mError != null) { 423 hideError(); 424 } 425 426 suspendBlink(); 427 428 if (mInsertionPointCursorController != null) { 429 mInsertionPointCursorController.onDetached(); 430 } 431 432 if (mSelectionModifierCursorController != null) { 433 mSelectionModifierCursorController.onDetached(); 434 } 435 436 if (mShowSuggestionRunnable != null) { 437 mTextView.removeCallbacks(mShowSuggestionRunnable); 438 } 439 440 // Cancel the single tap delayed runnable. 441 if (mInsertionActionModeRunnable != null) { 442 mTextView.removeCallbacks(mInsertionActionModeRunnable); 443 } 444 445 mTextView.removeCallbacks(mShowFloatingToolbar); 446 447 discardTextDisplayLists(); 448 449 if (mSpellChecker != null) { 450 mSpellChecker.closeSession(); 451 // Forces the creation of a new SpellChecker next time this window is created. 452 // Will handle the cases where the settings has been changed in the meantime. 453 mSpellChecker = null; 454 } 455 456 hideCursorAndSpanControllers(); 457 stopTextActionModeWithPreservingSelection(); 458 } 459 460 private void discardTextDisplayLists() { 461 if (mTextRenderNodes != null) { 462 for (int i = 0; i < mTextRenderNodes.length; i++) { 463 RenderNode displayList = mTextRenderNodes[i] != null 464 ? mTextRenderNodes[i].renderNode : null; 465 if (displayList != null && displayList.isValid()) { 466 displayList.discardDisplayList(); 467 } 468 } 469 } 470 } 471 472 private void showError() { 473 if (mTextView.getWindowToken() == null) { 474 mShowErrorAfterAttach = true; 475 return; 476 } 477 478 if (mErrorPopup == null) { 479 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 480 final TextView err = (TextView) inflater.inflate( 481 com.android.internal.R.layout.textview_hint, null); 482 483 final float scale = mTextView.getResources().getDisplayMetrics().density; 484 mErrorPopup = 485 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 486 mErrorPopup.setFocusable(false); 487 // The user is entering text, so the input method is needed. We 488 // don't want the popup to be displayed on top of it. 489 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 490 } 491 492 TextView tv = (TextView) mErrorPopup.getContentView(); 493 chooseSize(mErrorPopup, mError, tv); 494 tv.setText(mError); 495 496 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 497 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 498 } 499 500 public void setError(CharSequence error, Drawable icon) { 501 mError = TextUtils.stringOrSpannedString(error); 502 mErrorWasChanged = true; 503 504 if (mError == null) { 505 setErrorIcon(null); 506 if (mErrorPopup != null) { 507 if (mErrorPopup.isShowing()) { 508 mErrorPopup.dismiss(); 509 } 510 511 mErrorPopup = null; 512 } 513 mShowErrorAfterAttach = false; 514 } else { 515 setErrorIcon(icon); 516 if (mTextView.isFocused()) { 517 showError(); 518 } 519 } 520 } 521 522 private void setErrorIcon(Drawable icon) { 523 Drawables dr = mTextView.mDrawables; 524 if (dr == null) { 525 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 526 } 527 dr.setErrorDrawable(icon, mTextView); 528 529 mTextView.resetResolvedDrawables(); 530 mTextView.invalidate(); 531 mTextView.requestLayout(); 532 } 533 534 private void hideError() { 535 if (mErrorPopup != null) { 536 if (mErrorPopup.isShowing()) { 537 mErrorPopup.dismiss(); 538 } 539 } 540 541 mShowErrorAfterAttach = false; 542 } 543 544 /** 545 * Returns the X offset to make the pointy top of the error point 546 * at the middle of the error icon. 547 */ 548 private int getErrorX() { 549 /* 550 * The "25" is the distance between the point and the right edge 551 * of the background 552 */ 553 final float scale = mTextView.getResources().getDisplayMetrics().density; 554 555 final Drawables dr = mTextView.mDrawables; 556 557 final int layoutDirection = mTextView.getLayoutDirection(); 558 int errorX; 559 int offset; 560 switch (layoutDirection) { 561 default: 562 case View.LAYOUT_DIRECTION_LTR: 563 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 564 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 565 - mTextView.getPaddingRight() + offset; 566 break; 567 case View.LAYOUT_DIRECTION_RTL: 568 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 569 errorX = mTextView.getPaddingLeft() + offset; 570 break; 571 } 572 return errorX; 573 } 574 575 /** 576 * Returns the Y offset to make the pointy top of the error point 577 * at the bottom of the error icon. 578 */ 579 private int getErrorY() { 580 /* 581 * Compound, not extended, because the icon is not clipped 582 * if the text height is smaller. 583 */ 584 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 585 int vspace = mTextView.getBottom() - mTextView.getTop() 586 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 587 588 final Drawables dr = mTextView.mDrawables; 589 590 final int layoutDirection = mTextView.getLayoutDirection(); 591 int height; 592 switch (layoutDirection) { 593 default: 594 case View.LAYOUT_DIRECTION_LTR: 595 height = (dr != null ? dr.mDrawableHeightRight : 0); 596 break; 597 case View.LAYOUT_DIRECTION_RTL: 598 height = (dr != null ? dr.mDrawableHeightLeft : 0); 599 break; 600 } 601 602 int icontop = compoundPaddingTop + (vspace - height) / 2; 603 604 /* 605 * The "2" is the distance between the point and the top edge 606 * of the background. 607 */ 608 final float scale = mTextView.getResources().getDisplayMetrics().density; 609 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 610 } 611 612 void createInputContentTypeIfNeeded() { 613 if (mInputContentType == null) { 614 mInputContentType = new InputContentType(); 615 } 616 } 617 618 void createInputMethodStateIfNeeded() { 619 if (mInputMethodState == null) { 620 mInputMethodState = new InputMethodState(); 621 } 622 } 623 624 boolean isCursorVisible() { 625 // The default value is true, even when there is no associated Editor 626 return mCursorVisible && mTextView.isTextEditable(); 627 } 628 629 void prepareCursorControllers() { 630 boolean windowSupportsHandles = false; 631 632 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 633 if (params instanceof WindowManager.LayoutParams) { 634 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 635 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 636 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 637 } 638 639 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 640 mInsertionControllerEnabled = enabled && isCursorVisible(); 641 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 642 643 if (!mInsertionControllerEnabled) { 644 hideInsertionPointCursorController(); 645 if (mInsertionPointCursorController != null) { 646 mInsertionPointCursorController.onDetached(); 647 mInsertionPointCursorController = null; 648 } 649 } 650 651 if (!mSelectionControllerEnabled) { 652 stopTextActionMode(); 653 if (mSelectionModifierCursorController != null) { 654 mSelectionModifierCursorController.onDetached(); 655 mSelectionModifierCursorController = null; 656 } 657 } 658 } 659 660 void hideInsertionPointCursorController() { 661 if (mInsertionPointCursorController != null) { 662 mInsertionPointCursorController.hide(); 663 } 664 } 665 666 /** 667 * Hides the insertion and span controllers. 668 */ 669 void hideCursorAndSpanControllers() { 670 hideCursorControllers(); 671 hideSpanControllers(); 672 } 673 674 private void hideSpanControllers() { 675 if (mSpanController != null) { 676 mSpanController.hide(); 677 } 678 } 679 680 private void hideCursorControllers() { 681 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 682 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 683 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 684 // to distinguish one from the other. 685 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 686 || !mSuggestionsPopupWindow.isShowingUp())) { 687 // Should be done before hide insertion point controller since it triggers a show of it 688 mSuggestionsPopupWindow.hide(); 689 } 690 hideInsertionPointCursorController(); 691 } 692 693 /** 694 * Create new SpellCheckSpans on the modified region. 695 */ 696 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 697 // Remove spans whose adjacent characters are text not punctuation 698 mTextView.removeAdjacentSuggestionSpans(start); 699 mTextView.removeAdjacentSuggestionSpans(end); 700 701 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 702 && !(mTextView.isInExtractedMode())) { 703 if (mSpellChecker == null && createSpellChecker) { 704 mSpellChecker = new SpellChecker(mTextView); 705 } 706 if (mSpellChecker != null) { 707 mSpellChecker.spellCheck(start, end); 708 } 709 } 710 } 711 712 void onScreenStateChanged(int screenState) { 713 switch (screenState) { 714 case View.SCREEN_STATE_ON: 715 resumeBlink(); 716 break; 717 case View.SCREEN_STATE_OFF: 718 suspendBlink(); 719 break; 720 } 721 } 722 723 private void suspendBlink() { 724 if (mBlink != null) { 725 mBlink.cancel(); 726 } 727 } 728 729 private void resumeBlink() { 730 if (mBlink != null) { 731 mBlink.uncancel(); 732 makeBlink(); 733 } 734 } 735 736 void adjustInputType(boolean password, boolean passwordInputType, 737 boolean webPasswordInputType, boolean numberPasswordInputType) { 738 // mInputType has been set from inputType, possibly modified by mInputMethod. 739 // Specialize mInputType to [web]password if we have a text class and the original input 740 // type was a password. 741 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 742 if (password || passwordInputType) { 743 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 744 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 745 } 746 if (webPasswordInputType) { 747 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 748 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 749 } 750 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 751 if (numberPasswordInputType) { 752 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 753 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 754 } 755 } 756 } 757 758 private void chooseSize(@NonNull PopupWindow pop, @NonNull CharSequence text, 759 @NonNull TextView tv) { 760 final int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 761 final int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 762 763 final int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 764 com.android.internal.R.dimen.textview_error_popup_default_width); 765 final StaticLayout l = StaticLayout.Builder.obtain(text, 0, text.length(), tv.getPaint(), 766 defaultWidthInPixels) 767 .setUseLineSpacingFromFallbacks(tv.mUseFallbackLineSpacing) 768 .build(); 769 770 float max = 0; 771 for (int i = 0; i < l.getLineCount(); i++) { 772 max = Math.max(max, l.getLineWidth(i)); 773 } 774 775 /* 776 * Now set the popup size to be big enough for the text plus the border capped 777 * to DEFAULT_MAX_POPUP_WIDTH 778 */ 779 pop.setWidth(wid + (int) Math.ceil(max)); 780 pop.setHeight(ht + l.getHeight()); 781 } 782 783 void setFrame() { 784 if (mErrorPopup != null) { 785 TextView tv = (TextView) mErrorPopup.getContentView(); 786 chooseSize(mErrorPopup, mError, tv); 787 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 788 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 789 } 790 } 791 792 private int getWordStart(int offset) { 793 // FIXME - For this and similar methods we're not doing anything to check if there's 794 // a LocaleSpan in the text, this may be something we should try handling or checking for. 795 int retOffset = getWordIteratorWithText().prevBoundary(offset); 796 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 797 // On punctuation boundary or within group of punctuation, find punctuation start. 798 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 799 } else { 800 // Not on a punctuation boundary, find the word start. 801 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 802 } 803 if (retOffset == BreakIterator.DONE) { 804 return offset; 805 } 806 return retOffset; 807 } 808 809 private int getWordEnd(int offset) { 810 int retOffset = getWordIteratorWithText().nextBoundary(offset); 811 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 812 // On punctuation boundary or within group of punctuation, find punctuation end. 813 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 814 } else { 815 // Not on a punctuation boundary, find the word end. 816 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 817 } 818 if (retOffset == BreakIterator.DONE) { 819 return offset; 820 } 821 return retOffset; 822 } 823 824 private boolean needsToSelectAllToSelectWordOrParagraph() { 825 if (mTextView.hasPasswordTransformationMethod()) { 826 // Always select all on a password field. 827 // Cut/copy menu entries are not available for passwords, but being able to select all 828 // is however useful to delete or paste to replace the entire content. 829 return true; 830 } 831 832 int inputType = mTextView.getInputType(); 833 int klass = inputType & InputType.TYPE_MASK_CLASS; 834 int variation = inputType & InputType.TYPE_MASK_VARIATION; 835 836 // Specific text field types: select the entire text for these 837 if (klass == InputType.TYPE_CLASS_NUMBER 838 || klass == InputType.TYPE_CLASS_PHONE 839 || klass == InputType.TYPE_CLASS_DATETIME 840 || variation == InputType.TYPE_TEXT_VARIATION_URI 841 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 842 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 843 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 844 return true; 845 } 846 return false; 847 } 848 849 /** 850 * Adjusts selection to the word under last touch offset. Return true if the operation was 851 * successfully performed. 852 */ 853 boolean selectCurrentWord() { 854 if (!mTextView.canSelectText()) { 855 return false; 856 } 857 858 if (needsToSelectAllToSelectWordOrParagraph()) { 859 return mTextView.selectAllText(); 860 } 861 862 long lastTouchOffsets = getLastTouchOffsets(); 863 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 864 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 865 866 // Safety check in case standard touch event handling has been bypassed 867 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 868 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 869 870 int selectionStart, selectionEnd; 871 872 // If a URLSpan (web address, email, phone...) is found at that position, select it. 873 URLSpan[] urlSpans = 874 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 875 if (urlSpans.length >= 1) { 876 URLSpan urlSpan = urlSpans[0]; 877 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 878 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 879 } else { 880 // FIXME - We should check if there's a LocaleSpan in the text, this may be 881 // something we should try handling or checking for. 882 final WordIterator wordIterator = getWordIterator(); 883 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 884 885 selectionStart = wordIterator.getBeginning(minOffset); 886 selectionEnd = wordIterator.getEnd(maxOffset); 887 888 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 889 || selectionStart == selectionEnd) { 890 // Possible when the word iterator does not properly handle the text's language 891 long range = getCharClusterRange(minOffset); 892 selectionStart = TextUtils.unpackRangeStartFromLong(range); 893 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 894 } 895 } 896 897 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 898 return selectionEnd > selectionStart; 899 } 900 901 /** 902 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 903 * successfully performed. 904 */ 905 private boolean selectCurrentParagraph() { 906 if (!mTextView.canSelectText()) { 907 return false; 908 } 909 910 if (needsToSelectAllToSelectWordOrParagraph()) { 911 return mTextView.selectAllText(); 912 } 913 914 long lastTouchOffsets = getLastTouchOffsets(); 915 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 916 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 917 918 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 919 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 920 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 921 if (start < end) { 922 Selection.setSelection((Spannable) mTextView.getText(), start, end); 923 return true; 924 } 925 return false; 926 } 927 928 /** 929 * Get the minimum range of paragraphs that contains startOffset and endOffset. 930 */ 931 private long getParagraphsRange(int startOffset, int endOffset) { 932 final Layout layout = mTextView.getLayout(); 933 if (layout == null) { 934 return TextUtils.packRangeInLong(-1, -1); 935 } 936 final CharSequence text = mTextView.getText(); 937 int minLine = layout.getLineForOffset(startOffset); 938 // Search paragraph start. 939 while (minLine > 0) { 940 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 941 if (text.charAt(prevLineEndOffset - 1) == '\n') { 942 break; 943 } 944 minLine--; 945 } 946 int maxLine = layout.getLineForOffset(endOffset); 947 // Search paragraph end. 948 while (maxLine < layout.getLineCount() - 1) { 949 final int lineEndOffset = layout.getLineEnd(maxLine); 950 if (text.charAt(lineEndOffset - 1) == '\n') { 951 break; 952 } 953 maxLine++; 954 } 955 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 956 } 957 958 void onLocaleChanged() { 959 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 960 // proper new locale 961 mWordIterator = null; 962 mWordIteratorWithText = null; 963 } 964 965 public WordIterator getWordIterator() { 966 if (mWordIterator == null) { 967 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 968 } 969 return mWordIterator; 970 } 971 972 private WordIterator getWordIteratorWithText() { 973 if (mWordIteratorWithText == null) { 974 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 975 mUpdateWordIteratorText = true; 976 } 977 if (mUpdateWordIteratorText) { 978 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 979 // to the user's selection is needed. A possible solution would be to 980 // copy some number N of characters near the selection and then when the 981 // user approaches N then we'd do another copy of the next N characters. 982 CharSequence text = mTextView.getText(); 983 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 984 mUpdateWordIteratorText = false; 985 } 986 return mWordIteratorWithText; 987 } 988 989 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 990 final Layout layout = mTextView.getLayout(); 991 if (layout == null) return offset; 992 return findAfterGivenOffset == layout.isRtlCharAt(offset) 993 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 994 } 995 996 private long getCharClusterRange(int offset) { 997 final int textLength = mTextView.getText().length(); 998 if (offset < textLength) { 999 final int clusterEndOffset = getNextCursorOffset(offset, true); 1000 return TextUtils.packRangeInLong( 1001 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 1002 } 1003 if (offset - 1 >= 0) { 1004 final int clusterStartOffset = getNextCursorOffset(offset, false); 1005 return TextUtils.packRangeInLong(clusterStartOffset, 1006 getNextCursorOffset(clusterStartOffset, true)); 1007 } 1008 return TextUtils.packRangeInLong(offset, offset); 1009 } 1010 1011 private boolean touchPositionIsInSelection() { 1012 int selectionStart = mTextView.getSelectionStart(); 1013 int selectionEnd = mTextView.getSelectionEnd(); 1014 1015 if (selectionStart == selectionEnd) { 1016 return false; 1017 } 1018 1019 if (selectionStart > selectionEnd) { 1020 int tmp = selectionStart; 1021 selectionStart = selectionEnd; 1022 selectionEnd = tmp; 1023 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1024 } 1025 1026 SelectionModifierCursorController selectionController = getSelectionController(); 1027 int minOffset = selectionController.getMinTouchOffset(); 1028 int maxOffset = selectionController.getMaxTouchOffset(); 1029 1030 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1031 } 1032 1033 private PositionListener getPositionListener() { 1034 if (mPositionListener == null) { 1035 mPositionListener = new PositionListener(); 1036 } 1037 return mPositionListener; 1038 } 1039 1040 private interface TextViewPositionListener { 1041 public void updatePosition(int parentPositionX, int parentPositionY, 1042 boolean parentPositionChanged, boolean parentScrolled); 1043 } 1044 1045 private boolean isOffsetVisible(int offset) { 1046 Layout layout = mTextView.getLayout(); 1047 if (layout == null) return false; 1048 1049 final int line = layout.getLineForOffset(offset); 1050 final int lineBottom = layout.getLineBottom(line); 1051 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1052 return mTextView.isPositionVisible( 1053 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1054 lineBottom + mTextView.viewportToContentVerticalOffset()); 1055 } 1056 1057 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1058 * in the view. Returns false when the position is in the empty space of left/right of text. 1059 */ 1060 private boolean isPositionOnText(float x, float y) { 1061 Layout layout = mTextView.getLayout(); 1062 if (layout == null) return false; 1063 1064 final int line = mTextView.getLineAtCoordinate(y); 1065 x = mTextView.convertToLocalHorizontalCoordinate(x); 1066 1067 if (x < layout.getLineLeft(line)) return false; 1068 if (x > layout.getLineRight(line)) return false; 1069 return true; 1070 } 1071 1072 private void startDragAndDrop() { 1073 getSelectionActionModeHelper().onSelectionDrag(); 1074 1075 // TODO: Fix drag and drop in full screen extracted mode. 1076 if (mTextView.isInExtractedMode()) { 1077 return; 1078 } 1079 final int start = mTextView.getSelectionStart(); 1080 final int end = mTextView.getSelectionEnd(); 1081 CharSequence selectedText = mTextView.getTransformedText(start, end); 1082 ClipData data = ClipData.newPlainText(null, selectedText); 1083 DragLocalState localState = new DragLocalState(mTextView, start, end); 1084 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1085 View.DRAG_FLAG_GLOBAL); 1086 stopTextActionMode(); 1087 if (hasSelectionController()) { 1088 getSelectionController().resetTouchOffsets(); 1089 } 1090 } 1091 1092 public boolean performLongClick(boolean handled) { 1093 // Long press in empty space moves cursor and starts the insertion action mode. 1094 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1095 && mInsertionControllerEnabled) { 1096 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1097 mLastDownPositionY); 1098 Selection.setSelection((Spannable) mTextView.getText(), offset); 1099 getInsertionController().show(); 1100 mIsInsertionActionModeStartPending = true; 1101 handled = true; 1102 MetricsLogger.action( 1103 mTextView.getContext(), 1104 MetricsEvent.TEXT_LONGPRESS, 1105 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1106 } 1107 1108 if (!handled && mTextActionMode != null) { 1109 if (touchPositionIsInSelection()) { 1110 startDragAndDrop(); 1111 MetricsLogger.action( 1112 mTextView.getContext(), 1113 MetricsEvent.TEXT_LONGPRESS, 1114 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1115 } else { 1116 stopTextActionMode(); 1117 selectCurrentWordAndStartDrag(); 1118 MetricsLogger.action( 1119 mTextView.getContext(), 1120 MetricsEvent.TEXT_LONGPRESS, 1121 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1122 } 1123 handled = true; 1124 } 1125 1126 // Start a new selection 1127 if (!handled) { 1128 handled = selectCurrentWordAndStartDrag(); 1129 if (handled) { 1130 MetricsLogger.action( 1131 mTextView.getContext(), 1132 MetricsEvent.TEXT_LONGPRESS, 1133 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1134 } 1135 } 1136 1137 return handled; 1138 } 1139 1140 float getLastUpPositionX() { 1141 return mLastUpPositionX; 1142 } 1143 1144 float getLastUpPositionY() { 1145 return mLastUpPositionY; 1146 } 1147 1148 private long getLastTouchOffsets() { 1149 SelectionModifierCursorController selectionController = getSelectionController(); 1150 final int minOffset = selectionController.getMinTouchOffset(); 1151 final int maxOffset = selectionController.getMaxTouchOffset(); 1152 return TextUtils.packRangeInLong(minOffset, maxOffset); 1153 } 1154 1155 void onFocusChanged(boolean focused, int direction) { 1156 mShowCursor = SystemClock.uptimeMillis(); 1157 ensureEndedBatchEdit(); 1158 1159 if (focused) { 1160 int selStart = mTextView.getSelectionStart(); 1161 int selEnd = mTextView.getSelectionEnd(); 1162 1163 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1164 // mode for these, unless there was a specific selection already started. 1165 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1166 && selEnd == mTextView.getText().length(); 1167 1168 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1169 && !isFocusHighlighted; 1170 1171 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1172 // If a tap was used to give focus to that view, move cursor at tap position. 1173 // Has to be done before onTakeFocus, which can be overloaded. 1174 final int lastTapPosition = getLastTapPosition(); 1175 if (lastTapPosition >= 0) { 1176 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1177 } 1178 1179 // Note this may have to be moved out of the Editor class 1180 MovementMethod mMovement = mTextView.getMovementMethod(); 1181 if (mMovement != null) { 1182 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1183 } 1184 1185 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1186 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1187 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1188 // This special case ensure that we keep current selection in that case. 1189 // It would be better to know why the DecorView does not have focus at that time. 1190 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1191 && selStart >= 0 && selEnd >= 0) { 1192 /* 1193 * Someone intentionally set the selection, so let them 1194 * do whatever it is that they wanted to do instead of 1195 * the default on-focus behavior. We reset the selection 1196 * here instead of just skipping the onTakeFocus() call 1197 * because some movement methods do something other than 1198 * just setting the selection in theirs and we still 1199 * need to go through that path. 1200 */ 1201 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1202 } 1203 1204 if (mSelectAllOnFocus) { 1205 mTextView.selectAllText(); 1206 } 1207 1208 mTouchFocusSelected = true; 1209 } 1210 1211 mFrozenWithFocus = false; 1212 mSelectionMoved = false; 1213 1214 if (mError != null) { 1215 showError(); 1216 } 1217 1218 makeBlink(); 1219 } else { 1220 if (mError != null) { 1221 hideError(); 1222 } 1223 // Don't leave us in the middle of a batch edit. 1224 mTextView.onEndBatchEdit(); 1225 1226 if (mTextView.isInExtractedMode()) { 1227 hideCursorAndSpanControllers(); 1228 stopTextActionModeWithPreservingSelection(); 1229 } else { 1230 hideCursorAndSpanControllers(); 1231 if (mTextView.isTemporarilyDetached()) { 1232 stopTextActionModeWithPreservingSelection(); 1233 } else { 1234 stopTextActionMode(); 1235 } 1236 downgradeEasyCorrectionSpans(); 1237 } 1238 // No need to create the controller 1239 if (mSelectionModifierCursorController != null) { 1240 mSelectionModifierCursorController.resetTouchOffsets(); 1241 } 1242 } 1243 } 1244 1245 /** 1246 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1247 * span. 1248 */ 1249 private void downgradeEasyCorrectionSpans() { 1250 CharSequence text = mTextView.getText(); 1251 if (text instanceof Spannable) { 1252 Spannable spannable = (Spannable) text; 1253 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1254 spannable.length(), SuggestionSpan.class); 1255 for (int i = 0; i < suggestionSpans.length; i++) { 1256 int flags = suggestionSpans[i].getFlags(); 1257 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1258 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1259 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1260 suggestionSpans[i].setFlags(flags); 1261 } 1262 } 1263 } 1264 } 1265 1266 void sendOnTextChanged(int start, int before, int after) { 1267 getSelectionActionModeHelper().onTextChanged(start, start + before); 1268 updateSpellCheckSpans(start, start + after, false); 1269 1270 // Flip flag to indicate the word iterator needs to have the text reset. 1271 mUpdateWordIteratorText = true; 1272 1273 // Hide the controllers as soon as text is modified (typing, procedural...) 1274 // We do not hide the span controllers, since they can be added when a new text is 1275 // inserted into the text view (voice IME). 1276 hideCursorControllers(); 1277 // Reset drag accelerator. 1278 if (mSelectionModifierCursorController != null) { 1279 mSelectionModifierCursorController.resetTouchOffsets(); 1280 } 1281 stopTextActionMode(); 1282 } 1283 1284 private int getLastTapPosition() { 1285 // No need to create the controller at that point, no last tap position saved 1286 if (mSelectionModifierCursorController != null) { 1287 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1288 if (lastTapPosition >= 0) { 1289 // Safety check, should not be possible. 1290 if (lastTapPosition > mTextView.getText().length()) { 1291 lastTapPosition = mTextView.getText().length(); 1292 } 1293 return lastTapPosition; 1294 } 1295 } 1296 1297 return -1; 1298 } 1299 1300 void onWindowFocusChanged(boolean hasWindowFocus) { 1301 if (hasWindowFocus) { 1302 if (mBlink != null) { 1303 mBlink.uncancel(); 1304 makeBlink(); 1305 } 1306 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1307 refreshTextActionMode(); 1308 } 1309 } else { 1310 if (mBlink != null) { 1311 mBlink.cancel(); 1312 } 1313 if (mInputContentType != null) { 1314 mInputContentType.enterDown = false; 1315 } 1316 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1317 hideCursorAndSpanControllers(); 1318 stopTextActionModeWithPreservingSelection(); 1319 if (mSuggestionsPopupWindow != null) { 1320 mSuggestionsPopupWindow.onParentLostFocus(); 1321 } 1322 1323 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1324 ensureEndedBatchEdit(); 1325 } 1326 } 1327 1328 private void updateTapState(MotionEvent event) { 1329 final int action = event.getActionMasked(); 1330 if (action == MotionEvent.ACTION_DOWN) { 1331 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1332 // Detect double tap and triple click. 1333 if (((mTapState == TAP_STATE_FIRST_TAP) 1334 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1335 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1336 <= ViewConfiguration.getDoubleTapTimeout()) { 1337 if (mTapState == TAP_STATE_FIRST_TAP) { 1338 mTapState = TAP_STATE_DOUBLE_TAP; 1339 } else { 1340 mTapState = TAP_STATE_TRIPLE_CLICK; 1341 } 1342 } else { 1343 mTapState = TAP_STATE_FIRST_TAP; 1344 } 1345 } 1346 if (action == MotionEvent.ACTION_UP) { 1347 mLastTouchUpTime = SystemClock.uptimeMillis(); 1348 } 1349 } 1350 1351 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1352 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1353 return false; 1354 } 1355 final boolean primaryButtonStateChanged = 1356 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1357 final int action = event.getActionMasked(); 1358 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1359 && !primaryButtonStateChanged) { 1360 return true; 1361 } 1362 if (action == MotionEvent.ACTION_MOVE 1363 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1364 return true; 1365 } 1366 return false; 1367 } 1368 1369 void onTouchEvent(MotionEvent event) { 1370 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1371 mLastButtonState = event.getButtonState(); 1372 if (filterOutEvent) { 1373 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1374 mDiscardNextActionUp = true; 1375 } 1376 return; 1377 } 1378 updateTapState(event); 1379 updateFloatingToolbarVisibility(event); 1380 1381 if (hasSelectionController()) { 1382 getSelectionController().onTouchEvent(event); 1383 } 1384 1385 if (mShowSuggestionRunnable != null) { 1386 mTextView.removeCallbacks(mShowSuggestionRunnable); 1387 mShowSuggestionRunnable = null; 1388 } 1389 1390 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1391 mLastUpPositionX = event.getX(); 1392 mLastUpPositionY = event.getY(); 1393 } 1394 1395 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1396 mLastDownPositionX = event.getX(); 1397 mLastDownPositionY = event.getY(); 1398 1399 // Reset this state; it will be re-set if super.onTouchEvent 1400 // causes focus to move to the view. 1401 mTouchFocusSelected = false; 1402 mIgnoreActionUpEvent = false; 1403 } 1404 } 1405 1406 private void updateFloatingToolbarVisibility(MotionEvent event) { 1407 if (mTextActionMode != null) { 1408 switch (event.getActionMasked()) { 1409 case MotionEvent.ACTION_MOVE: 1410 hideFloatingToolbar(ActionMode.DEFAULT_HIDE_DURATION); 1411 break; 1412 case MotionEvent.ACTION_UP: // fall through 1413 case MotionEvent.ACTION_CANCEL: 1414 showFloatingToolbar(); 1415 } 1416 } 1417 } 1418 1419 void hideFloatingToolbar(int duration) { 1420 if (mTextActionMode != null) { 1421 mTextView.removeCallbacks(mShowFloatingToolbar); 1422 mTextActionMode.hide(duration); 1423 } 1424 } 1425 1426 private void showFloatingToolbar() { 1427 if (mTextActionMode != null) { 1428 // Delay "show" so it doesn't interfere with click confirmations 1429 // or double-clicks that could "dismiss" the floating toolbar. 1430 int delay = ViewConfiguration.getDoubleTapTimeout(); 1431 mTextView.postDelayed(mShowFloatingToolbar, delay); 1432 1433 // This classifies the text and most likely returns before the toolbar is actually 1434 // shown. If not, it will update the toolbar with the result when classification 1435 // returns. We would rather not wait for a long running classification process. 1436 invalidateActionModeAsync(); 1437 } 1438 } 1439 1440 public void beginBatchEdit() { 1441 mInBatchEditControllers = true; 1442 final InputMethodState ims = mInputMethodState; 1443 if (ims != null) { 1444 int nesting = ++ims.mBatchEditNesting; 1445 if (nesting == 1) { 1446 ims.mCursorChanged = false; 1447 ims.mChangedDelta = 0; 1448 if (ims.mContentChanged) { 1449 // We already have a pending change from somewhere else, 1450 // so turn this into a full update. 1451 ims.mChangedStart = 0; 1452 ims.mChangedEnd = mTextView.getText().length(); 1453 } else { 1454 ims.mChangedStart = EXTRACT_UNKNOWN; 1455 ims.mChangedEnd = EXTRACT_UNKNOWN; 1456 ims.mContentChanged = false; 1457 } 1458 mUndoInputFilter.beginBatchEdit(); 1459 mTextView.onBeginBatchEdit(); 1460 } 1461 } 1462 } 1463 1464 public void endBatchEdit() { 1465 mInBatchEditControllers = false; 1466 final InputMethodState ims = mInputMethodState; 1467 if (ims != null) { 1468 int nesting = --ims.mBatchEditNesting; 1469 if (nesting == 0) { 1470 finishBatchEdit(ims); 1471 } 1472 } 1473 } 1474 1475 void ensureEndedBatchEdit() { 1476 final InputMethodState ims = mInputMethodState; 1477 if (ims != null && ims.mBatchEditNesting != 0) { 1478 ims.mBatchEditNesting = 0; 1479 finishBatchEdit(ims); 1480 } 1481 } 1482 1483 void finishBatchEdit(final InputMethodState ims) { 1484 mTextView.onEndBatchEdit(); 1485 mUndoInputFilter.endBatchEdit(); 1486 1487 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1488 mTextView.updateAfterEdit(); 1489 reportExtractedText(); 1490 } else if (ims.mCursorChanged) { 1491 // Cheesy way to get us to report the current cursor location. 1492 mTextView.invalidateCursor(); 1493 } 1494 // sendUpdateSelection knows to avoid sending if the selection did 1495 // not actually change. 1496 sendUpdateSelection(); 1497 1498 // Show drag handles if they were blocked by batch edit mode. 1499 if (mTextActionMode != null) { 1500 final CursorController cursorController = mTextView.hasSelection() 1501 ? getSelectionController() : getInsertionController(); 1502 if (cursorController != null && !cursorController.isActive() 1503 && !cursorController.isCursorBeingModified()) { 1504 cursorController.show(); 1505 } 1506 } 1507 } 1508 1509 static final int EXTRACT_NOTHING = -2; 1510 static final int EXTRACT_UNKNOWN = -1; 1511 1512 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1513 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1514 EXTRACT_UNKNOWN, outText); 1515 } 1516 1517 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1518 int partialStartOffset, int partialEndOffset, int delta, 1519 @Nullable ExtractedText outText) { 1520 if (request == null || outText == null) { 1521 return false; 1522 } 1523 1524 final CharSequence content = mTextView.getText(); 1525 if (content == null) { 1526 return false; 1527 } 1528 1529 if (partialStartOffset != EXTRACT_NOTHING) { 1530 final int N = content.length(); 1531 if (partialStartOffset < 0) { 1532 outText.partialStartOffset = outText.partialEndOffset = -1; 1533 partialStartOffset = 0; 1534 partialEndOffset = N; 1535 } else { 1536 // Now use the delta to determine the actual amount of text 1537 // we need. 1538 partialEndOffset += delta; 1539 // Adjust offsets to ensure we contain full spans. 1540 if (content instanceof Spanned) { 1541 Spanned spanned = (Spanned) content; 1542 Object[] spans = spanned.getSpans(partialStartOffset, 1543 partialEndOffset, ParcelableSpan.class); 1544 int i = spans.length; 1545 while (i > 0) { 1546 i--; 1547 int j = spanned.getSpanStart(spans[i]); 1548 if (j < partialStartOffset) partialStartOffset = j; 1549 j = spanned.getSpanEnd(spans[i]); 1550 if (j > partialEndOffset) partialEndOffset = j; 1551 } 1552 } 1553 outText.partialStartOffset = partialStartOffset; 1554 outText.partialEndOffset = partialEndOffset - delta; 1555 1556 if (partialStartOffset > N) { 1557 partialStartOffset = N; 1558 } else if (partialStartOffset < 0) { 1559 partialStartOffset = 0; 1560 } 1561 if (partialEndOffset > N) { 1562 partialEndOffset = N; 1563 } else if (partialEndOffset < 0) { 1564 partialEndOffset = 0; 1565 } 1566 } 1567 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1568 outText.text = content.subSequence(partialStartOffset, 1569 partialEndOffset); 1570 } else { 1571 outText.text = TextUtils.substring(content, partialStartOffset, 1572 partialEndOffset); 1573 } 1574 } else { 1575 outText.partialStartOffset = 0; 1576 outText.partialEndOffset = 0; 1577 outText.text = ""; 1578 } 1579 outText.flags = 0; 1580 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1581 outText.flags |= ExtractedText.FLAG_SELECTING; 1582 } 1583 if (mTextView.isSingleLine()) { 1584 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1585 } 1586 outText.startOffset = 0; 1587 outText.selectionStart = mTextView.getSelectionStart(); 1588 outText.selectionEnd = mTextView.getSelectionEnd(); 1589 outText.hint = mTextView.getHint(); 1590 return true; 1591 } 1592 1593 boolean reportExtractedText() { 1594 final Editor.InputMethodState ims = mInputMethodState; 1595 if (ims == null) { 1596 return false; 1597 } 1598 ims.mSelectionModeChanged = false; 1599 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1600 if (req == null) { 1601 return false; 1602 } 1603 final InputMethodManager imm = InputMethodManager.peekInstance(); 1604 if (imm == null) { 1605 return false; 1606 } 1607 if (TextView.DEBUG_EXTRACT) { 1608 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1609 + ims.mChangedStart 1610 + " end=" + ims.mChangedEnd 1611 + " delta=" + ims.mChangedDelta); 1612 } 1613 if (ims.mChangedStart < 0 && !ims.mContentChanged) { 1614 ims.mChangedStart = EXTRACT_NOTHING; 1615 } 1616 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1617 ims.mChangedDelta, ims.mExtractedText)) { 1618 if (TextView.DEBUG_EXTRACT) { 1619 Log.v(TextView.LOG_TAG, 1620 "Reporting extracted start=" 1621 + ims.mExtractedText.partialStartOffset 1622 + " end=" + ims.mExtractedText.partialEndOffset 1623 + ": " + ims.mExtractedText.text); 1624 } 1625 1626 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1627 ims.mChangedStart = EXTRACT_UNKNOWN; 1628 ims.mChangedEnd = EXTRACT_UNKNOWN; 1629 ims.mChangedDelta = 0; 1630 ims.mContentChanged = false; 1631 return true; 1632 } 1633 return false; 1634 } 1635 1636 private void sendUpdateSelection() { 1637 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1638 final InputMethodManager imm = InputMethodManager.peekInstance(); 1639 if (null != imm) { 1640 final int selectionStart = mTextView.getSelectionStart(); 1641 final int selectionEnd = mTextView.getSelectionEnd(); 1642 int candStart = -1; 1643 int candEnd = -1; 1644 if (mTextView.getText() instanceof Spannable) { 1645 final Spannable sp = (Spannable) mTextView.getText(); 1646 candStart = EditableInputConnection.getComposingSpanStart(sp); 1647 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1648 } 1649 // InputMethodManager#updateSelection skips sending the message if 1650 // none of the parameters have changed since the last time we called it. 1651 imm.updateSelection(mTextView, 1652 selectionStart, selectionEnd, candStart, candEnd); 1653 } 1654 } 1655 } 1656 1657 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1658 int cursorOffsetVertical) { 1659 final int selectionStart = mTextView.getSelectionStart(); 1660 final int selectionEnd = mTextView.getSelectionEnd(); 1661 1662 final InputMethodState ims = mInputMethodState; 1663 if (ims != null && ims.mBatchEditNesting == 0) { 1664 InputMethodManager imm = InputMethodManager.peekInstance(); 1665 if (imm != null) { 1666 if (imm.isActive(mTextView)) { 1667 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1668 // We are in extract mode and the content has changed 1669 // in some way... just report complete new text to the 1670 // input method. 1671 reportExtractedText(); 1672 } 1673 } 1674 } 1675 } 1676 1677 if (mCorrectionHighlighter != null) { 1678 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1679 } 1680 1681 if (highlight != null && selectionStart == selectionEnd && mDrawableForCursor != null) { 1682 drawCursor(canvas, cursorOffsetVertical); 1683 // Rely on the drawable entirely, do not draw the cursor line. 1684 // Has to be done after the IMM related code above which relies on the highlight. 1685 highlight = null; 1686 } 1687 1688 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1689 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1690 cursorOffsetVertical); 1691 } else { 1692 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1693 } 1694 1695 if (mSelectionActionModeHelper != null) { 1696 mSelectionActionModeHelper.onDraw(canvas); 1697 } 1698 } 1699 1700 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1701 Paint highlightPaint, int cursorOffsetVertical) { 1702 final long lineRange = layout.getLineRangeForDraw(canvas); 1703 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1704 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1705 if (lastLine < 0) return; 1706 1707 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1708 firstLine, lastLine); 1709 1710 if (layout instanceof DynamicLayout) { 1711 if (mTextRenderNodes == null) { 1712 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1713 } 1714 1715 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1716 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1717 int[] blockIndices = dynamicLayout.getBlockIndices(); 1718 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1719 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1720 1721 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1722 if (blockSet != null) { 1723 for (int i = 0; i < blockSet.size(); i++) { 1724 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1725 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1726 && mTextRenderNodes[blockIndex] != null) { 1727 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1728 } 1729 } 1730 } 1731 1732 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1733 if (startBlock < 0) { 1734 startBlock = -(startBlock + 1); 1735 } 1736 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1737 1738 int startIndexToFindAvailableRenderNode = 0; 1739 int lastIndex = numberOfBlocks; 1740 1741 for (int i = startBlock; i < numberOfBlocks; i++) { 1742 final int blockIndex = blockIndices[i]; 1743 if (i >= indexFirstChangedBlock 1744 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1745 && mTextRenderNodes[blockIndex] != null) { 1746 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1747 } 1748 if (blockEndLines[i] < firstLine) { 1749 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1750 // be redrawn after they get scrolled into drawing range. 1751 continue; 1752 } 1753 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1754 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1755 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1756 if (blockEndLines[i] >= lastLine) { 1757 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1758 break; 1759 } 1760 } 1761 if (blockSet != null) { 1762 for (int i = 0; i < blockSet.size(); i++) { 1763 final int block = blockSet.valueAt(i); 1764 final int blockIndex = dynamicLayout.getBlockIndex(block); 1765 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1766 || mTextRenderNodes[blockIndex] == null 1767 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1768 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1769 layout, highlight, highlightPaint, cursorOffsetVertical, 1770 blockEndLines, blockIndices, block, numberOfBlocks, 1771 startIndexToFindAvailableRenderNode); 1772 } 1773 } 1774 } 1775 1776 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1777 } else { 1778 // Boring layout is used for empty and hint text 1779 layout.drawText(canvas, firstLine, lastLine); 1780 } 1781 } 1782 1783 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1784 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1785 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1786 int startIndexToFindAvailableRenderNode) { 1787 final int blockEndLine = blockEndLines[blockInfoIndex]; 1788 int blockIndex = blockIndices[blockInfoIndex]; 1789 1790 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1791 if (blockIsInvalid) { 1792 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1793 startIndexToFindAvailableRenderNode); 1794 // Note how dynamic layout's internal block indices get updated from Editor 1795 blockIndices[blockInfoIndex] = blockIndex; 1796 if (mTextRenderNodes[blockIndex] != null) { 1797 mTextRenderNodes[blockIndex].isDirty = true; 1798 } 1799 startIndexToFindAvailableRenderNode = blockIndex + 1; 1800 } 1801 1802 if (mTextRenderNodes[blockIndex] == null) { 1803 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1804 } 1805 1806 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1807 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1808 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1809 final int blockBeginLine = blockInfoIndex == 0 ? 1810 0 : blockEndLines[blockInfoIndex - 1] + 1; 1811 final int top = layout.getLineTop(blockBeginLine); 1812 final int bottom = layout.getLineBottom(blockEndLine); 1813 int left = 0; 1814 int right = mTextView.getWidth(); 1815 if (mTextView.getHorizontallyScrolling()) { 1816 float min = Float.MAX_VALUE; 1817 float max = Float.MIN_VALUE; 1818 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1819 min = Math.min(min, layout.getLineLeft(line)); 1820 max = Math.max(max, layout.getLineRight(line)); 1821 } 1822 left = (int) min; 1823 right = (int) (max + 0.5f); 1824 } 1825 1826 // Rebuild display list if it is invalid 1827 if (blockDisplayListIsInvalid) { 1828 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1829 right - left, bottom - top); 1830 try { 1831 // drawText is always relative to TextView's origin, this translation 1832 // brings this range of text back to the top left corner of the viewport 1833 displayListCanvas.translate(-left, -top); 1834 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1835 mTextRenderNodes[blockIndex].isDirty = false; 1836 // No need to untranslate, previous context is popped after 1837 // drawDisplayList 1838 } finally { 1839 blockDisplayList.end(displayListCanvas); 1840 // Same as drawDisplayList below, handled by our TextView's parent 1841 blockDisplayList.setClipToBounds(false); 1842 } 1843 } 1844 1845 // Valid display list only needs to update its drawing location. 1846 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1847 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1848 } 1849 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1850 return startIndexToFindAvailableRenderNode; 1851 } 1852 1853 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1854 int searchStartIndex) { 1855 int length = mTextRenderNodes.length; 1856 for (int i = searchStartIndex; i < length; i++) { 1857 boolean blockIndexFound = false; 1858 for (int j = 0; j < numberOfBlocks; j++) { 1859 if (blockIndices[j] == i) { 1860 blockIndexFound = true; 1861 break; 1862 } 1863 } 1864 if (blockIndexFound) continue; 1865 return i; 1866 } 1867 1868 // No available index found, the pool has to grow 1869 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1870 return length; 1871 } 1872 1873 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1874 final boolean translate = cursorOffsetVertical != 0; 1875 if (translate) canvas.translate(0, cursorOffsetVertical); 1876 if (mDrawableForCursor != null) { 1877 mDrawableForCursor.draw(canvas); 1878 } 1879 if (translate) canvas.translate(0, -cursorOffsetVertical); 1880 } 1881 1882 void invalidateHandlesAndActionMode() { 1883 if (mSelectionModifierCursorController != null) { 1884 mSelectionModifierCursorController.invalidateHandles(); 1885 } 1886 if (mInsertionPointCursorController != null) { 1887 mInsertionPointCursorController.invalidateHandle(); 1888 } 1889 if (mTextActionMode != null) { 1890 invalidateActionMode(); 1891 } 1892 } 1893 1894 /** 1895 * Invalidates all the sub-display lists that overlap the specified character range 1896 */ 1897 void invalidateTextDisplayList(Layout layout, int start, int end) { 1898 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1899 final int firstLine = layout.getLineForOffset(start); 1900 final int lastLine = layout.getLineForOffset(end); 1901 1902 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1903 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1904 int[] blockIndices = dynamicLayout.getBlockIndices(); 1905 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1906 1907 int i = 0; 1908 // Skip the blocks before firstLine 1909 while (i < numberOfBlocks) { 1910 if (blockEndLines[i] >= firstLine) break; 1911 i++; 1912 } 1913 1914 // Invalidate all subsequent blocks until lastLine is passed 1915 while (i < numberOfBlocks) { 1916 final int blockIndex = blockIndices[i]; 1917 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1918 mTextRenderNodes[blockIndex].isDirty = true; 1919 } 1920 if (blockEndLines[i] >= lastLine) break; 1921 i++; 1922 } 1923 } 1924 } 1925 1926 void invalidateTextDisplayList() { 1927 if (mTextRenderNodes != null) { 1928 for (int i = 0; i < mTextRenderNodes.length; i++) { 1929 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1930 } 1931 } 1932 } 1933 1934 void updateCursorPosition() { 1935 if (mTextView.mCursorDrawableRes == 0) { 1936 mDrawableForCursor = null; 1937 return; 1938 } 1939 1940 final Layout layout = mTextView.getLayout(); 1941 final int offset = mTextView.getSelectionStart(); 1942 final int line = layout.getLineForOffset(offset); 1943 final int top = layout.getLineTop(line); 1944 final int bottom = layout.getLineBottomWithoutSpacing(line); 1945 1946 final boolean clamped = layout.shouldClampCursor(line); 1947 updateCursorPosition(top, bottom, layout.getPrimaryHorizontal(offset, clamped)); 1948 } 1949 1950 void refreshTextActionMode() { 1951 if (extractedTextModeWillBeStarted()) { 1952 mRestartActionModeOnNextRefresh = false; 1953 return; 1954 } 1955 final boolean hasSelection = mTextView.hasSelection(); 1956 final SelectionModifierCursorController selectionController = getSelectionController(); 1957 final InsertionPointCursorController insertionController = getInsertionController(); 1958 if ((selectionController != null && selectionController.isCursorBeingModified()) 1959 || (insertionController != null && insertionController.isCursorBeingModified())) { 1960 // ActionMode should be managed by the currently active cursor controller. 1961 mRestartActionModeOnNextRefresh = false; 1962 return; 1963 } 1964 if (hasSelection) { 1965 hideInsertionPointCursorController(); 1966 if (mTextActionMode == null) { 1967 if (mRestartActionModeOnNextRefresh) { 1968 // To avoid distraction, newly start action mode only when selection action 1969 // mode is being restarted. 1970 startSelectionActionModeAsync(false); 1971 } 1972 } else if (selectionController == null || !selectionController.isActive()) { 1973 // Insertion action mode is active. Avoid dismissing the selection. 1974 stopTextActionModeWithPreservingSelection(); 1975 startSelectionActionModeAsync(false); 1976 } else { 1977 mTextActionMode.invalidateContentRect(); 1978 } 1979 } else { 1980 // Insertion action mode is started only when insertion controller is explicitly 1981 // activated. 1982 if (insertionController == null || !insertionController.isActive()) { 1983 stopTextActionMode(); 1984 } else if (mTextActionMode != null) { 1985 mTextActionMode.invalidateContentRect(); 1986 } 1987 } 1988 mRestartActionModeOnNextRefresh = false; 1989 } 1990 1991 /** 1992 * Start an Insertion action mode. 1993 */ 1994 void startInsertionActionMode() { 1995 if (mInsertionActionModeRunnable != null) { 1996 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1997 } 1998 if (extractedTextModeWillBeStarted()) { 1999 return; 2000 } 2001 stopTextActionMode(); 2002 2003 ActionMode.Callback actionModeCallback = 2004 new TextActionModeCallback(false /* hasSelection */); 2005 mTextActionMode = mTextView.startActionMode( 2006 actionModeCallback, ActionMode.TYPE_FLOATING); 2007 if (mTextActionMode != null && getInsertionController() != null) { 2008 getInsertionController().show(); 2009 } 2010 } 2011 2012 @NonNull 2013 TextView getTextView() { 2014 return mTextView; 2015 } 2016 2017 @Nullable 2018 ActionMode getTextActionMode() { 2019 return mTextActionMode; 2020 } 2021 2022 void setRestartActionModeOnNextRefresh(boolean value) { 2023 mRestartActionModeOnNextRefresh = value; 2024 } 2025 2026 /** 2027 * Asynchronously starts a selection action mode using the TextClassifier. 2028 */ 2029 void startSelectionActionModeAsync(boolean adjustSelection) { 2030 getSelectionActionModeHelper().startActionModeAsync(adjustSelection); 2031 } 2032 2033 /** 2034 * Asynchronously invalidates an action mode using the TextClassifier. 2035 */ 2036 void invalidateActionModeAsync() { 2037 getSelectionActionModeHelper().invalidateActionModeAsync(); 2038 } 2039 2040 /** 2041 * Synchronously invalidates an action mode without the TextClassifier. 2042 */ 2043 private void invalidateActionMode() { 2044 if (mTextActionMode != null) { 2045 mTextActionMode.invalidate(); 2046 } 2047 } 2048 2049 private SelectionActionModeHelper getSelectionActionModeHelper() { 2050 if (mSelectionActionModeHelper == null) { 2051 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2052 } 2053 return mSelectionActionModeHelper; 2054 } 2055 2056 /** 2057 * If the TextView allows text selection, selects the current word when no existing selection 2058 * was available and starts a drag. 2059 * 2060 * @return true if the drag was started. 2061 */ 2062 private boolean selectCurrentWordAndStartDrag() { 2063 if (mInsertionActionModeRunnable != null) { 2064 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2065 } 2066 if (extractedTextModeWillBeStarted()) { 2067 return false; 2068 } 2069 if (!checkField()) { 2070 return false; 2071 } 2072 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2073 // No selection and cannot select a word. 2074 return false; 2075 } 2076 stopTextActionModeWithPreservingSelection(); 2077 getSelectionController().enterDrag( 2078 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2079 return true; 2080 } 2081 2082 /** 2083 * Checks whether a selection can be performed on the current TextView. 2084 * 2085 * @return true if a selection can be performed 2086 */ 2087 boolean checkField() { 2088 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2089 Log.w(TextView.LOG_TAG, 2090 "TextView does not support text selection. Selection cancelled."); 2091 return false; 2092 } 2093 return true; 2094 } 2095 2096 boolean startSelectionActionModeInternal() { 2097 if (extractedTextModeWillBeStarted()) { 2098 return false; 2099 } 2100 if (mTextActionMode != null) { 2101 // Text action mode is already started 2102 invalidateActionMode(); 2103 return false; 2104 } 2105 2106 if (!checkField() || !mTextView.hasSelection()) { 2107 return false; 2108 } 2109 2110 ActionMode.Callback actionModeCallback = 2111 new TextActionModeCallback(true /* hasSelection */); 2112 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2113 2114 final boolean selectionStarted = mTextActionMode != null; 2115 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2116 // Show the IME to be able to replace text, except when selecting non editable text. 2117 final InputMethodManager imm = InputMethodManager.peekInstance(); 2118 if (imm != null) { 2119 imm.showSoftInput(mTextView, 0, null); 2120 } 2121 } 2122 return selectionStarted; 2123 } 2124 2125 private boolean extractedTextModeWillBeStarted() { 2126 if (!(mTextView.isInExtractedMode())) { 2127 final InputMethodManager imm = InputMethodManager.peekInstance(); 2128 return imm != null && imm.isFullscreenMode(); 2129 } 2130 return false; 2131 } 2132 2133 /** 2134 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2135 * the current cursor position or selection range. This method is consistent with the 2136 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2137 */ 2138 private boolean shouldOfferToShowSuggestions() { 2139 CharSequence text = mTextView.getText(); 2140 if (!(text instanceof Spannable)) return false; 2141 2142 final Spannable spannable = (Spannable) text; 2143 final int selectionStart = mTextView.getSelectionStart(); 2144 final int selectionEnd = mTextView.getSelectionEnd(); 2145 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2146 SuggestionSpan.class); 2147 if (suggestionSpans.length == 0) { 2148 return false; 2149 } 2150 if (selectionStart == selectionEnd) { 2151 // Spans overlap the cursor. 2152 for (int i = 0; i < suggestionSpans.length; i++) { 2153 if (suggestionSpans[i].getSuggestions().length > 0) { 2154 return true; 2155 } 2156 } 2157 return false; 2158 } 2159 int minSpanStart = mTextView.getText().length(); 2160 int maxSpanEnd = 0; 2161 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2162 int unionOfSpansCoveringSelectionStartEnd = 0; 2163 boolean hasValidSuggestions = false; 2164 for (int i = 0; i < suggestionSpans.length; i++) { 2165 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2166 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2167 minSpanStart = Math.min(minSpanStart, spanStart); 2168 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2169 if (selectionStart < spanStart || selectionStart > spanEnd) { 2170 // The span doesn't cover the current selection start point. 2171 continue; 2172 } 2173 hasValidSuggestions = 2174 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2175 unionOfSpansCoveringSelectionStartStart = 2176 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2177 unionOfSpansCoveringSelectionStartEnd = 2178 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2179 } 2180 if (!hasValidSuggestions) { 2181 return false; 2182 } 2183 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2184 // No spans cover the selection start point. 2185 return false; 2186 } 2187 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2188 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2189 // There is a span that is not covered by the union. In this case, we soouldn't offer 2190 // to show suggestions as it's confusing. 2191 return false; 2192 } 2193 return true; 2194 } 2195 2196 /** 2197 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2198 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2199 */ 2200 private boolean isCursorInsideEasyCorrectionSpan() { 2201 Spannable spannable = (Spannable) mTextView.getText(); 2202 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2203 mTextView.getSelectionEnd(), SuggestionSpan.class); 2204 for (int i = 0; i < suggestionSpans.length; i++) { 2205 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2206 return true; 2207 } 2208 } 2209 return false; 2210 } 2211 2212 void onTouchUpEvent(MotionEvent event) { 2213 if (getSelectionActionModeHelper().resetSelection( 2214 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2215 return; 2216 } 2217 2218 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2219 hideCursorAndSpanControllers(); 2220 stopTextActionMode(); 2221 CharSequence text = mTextView.getText(); 2222 if (!selectAllGotFocus && text.length() > 0) { 2223 // Move cursor 2224 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2225 Selection.setSelection((Spannable) text, offset); 2226 if (mSpellChecker != null) { 2227 // When the cursor moves, the word that was typed may need spell check 2228 mSpellChecker.onSelectionChanged(); 2229 } 2230 2231 if (!extractedTextModeWillBeStarted()) { 2232 if (isCursorInsideEasyCorrectionSpan()) { 2233 // Cancel the single tap delayed runnable. 2234 if (mInsertionActionModeRunnable != null) { 2235 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2236 } 2237 2238 mShowSuggestionRunnable = new Runnable() { 2239 public void run() { 2240 replace(); 2241 } 2242 }; 2243 // removeCallbacks is performed on every touch 2244 mTextView.postDelayed(mShowSuggestionRunnable, 2245 ViewConfiguration.getDoubleTapTimeout()); 2246 } else if (hasInsertionController()) { 2247 getInsertionController().show(); 2248 } 2249 } 2250 } 2251 } 2252 2253 protected void stopTextActionMode() { 2254 if (mTextActionMode != null) { 2255 // This will hide the mSelectionModifierCursorController 2256 mTextActionMode.finish(); 2257 } 2258 } 2259 2260 private void stopTextActionModeWithPreservingSelection() { 2261 if (mTextActionMode != null) { 2262 mRestartActionModeOnNextRefresh = true; 2263 } 2264 mPreserveSelection = true; 2265 stopTextActionMode(); 2266 mPreserveSelection = false; 2267 } 2268 2269 /** 2270 * @return True if this view supports insertion handles. 2271 */ 2272 boolean hasInsertionController() { 2273 return mInsertionControllerEnabled; 2274 } 2275 2276 /** 2277 * @return True if this view supports selection handles. 2278 */ 2279 boolean hasSelectionController() { 2280 return mSelectionControllerEnabled; 2281 } 2282 2283 private InsertionPointCursorController getInsertionController() { 2284 if (!mInsertionControllerEnabled) { 2285 return null; 2286 } 2287 2288 if (mInsertionPointCursorController == null) { 2289 mInsertionPointCursorController = new InsertionPointCursorController(); 2290 2291 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2292 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2293 } 2294 2295 return mInsertionPointCursorController; 2296 } 2297 2298 @Nullable 2299 SelectionModifierCursorController getSelectionController() { 2300 if (!mSelectionControllerEnabled) { 2301 return null; 2302 } 2303 2304 if (mSelectionModifierCursorController == null) { 2305 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2306 2307 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2308 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2309 } 2310 2311 return mSelectionModifierCursorController; 2312 } 2313 2314 @VisibleForTesting 2315 @Nullable 2316 public Drawable getCursorDrawable() { 2317 return mDrawableForCursor; 2318 } 2319 2320 private void updateCursorPosition(int top, int bottom, float horizontal) { 2321 if (mDrawableForCursor == null) { 2322 mDrawableForCursor = mTextView.getContext().getDrawable( 2323 mTextView.mCursorDrawableRes); 2324 } 2325 final int left = clampHorizontalPosition(mDrawableForCursor, horizontal); 2326 final int width = mDrawableForCursor.getIntrinsicWidth(); 2327 mDrawableForCursor.setBounds(left, top - mTempRect.top, left + width, 2328 bottom + mTempRect.bottom); 2329 } 2330 2331 /** 2332 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2333 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2334 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2335 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2336 * of the view. 2337 * 2338 * @param drawable Drawable. Can be null. 2339 * @param horizontal Horizontal position for the drawable. 2340 * @return The clamped horizontal position for the drawable. 2341 */ 2342 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2343 horizontal = Math.max(0.5f, horizontal - 0.5f); 2344 if (mTempRect == null) mTempRect = new Rect(); 2345 2346 int drawableWidth = 0; 2347 if (drawable != null) { 2348 drawable.getPadding(mTempRect); 2349 drawableWidth = drawable.getIntrinsicWidth(); 2350 } else { 2351 mTempRect.setEmpty(); 2352 } 2353 2354 int scrollX = mTextView.getScrollX(); 2355 float horizontalDiff = horizontal - scrollX; 2356 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2357 - mTextView.getCompoundPaddingRight(); 2358 2359 final int left; 2360 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2361 // at the rightmost position 2362 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2363 } else if (Math.abs(horizontalDiff) <= 1f 2364 || (TextUtils.isEmpty(mTextView.getText()) 2365 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2366 && horizontal <= 1f)) { 2367 // at the leftmost position 2368 left = scrollX - mTempRect.left; 2369 } else { 2370 left = (int) horizontal - mTempRect.left; 2371 } 2372 return left; 2373 } 2374 2375 /** 2376 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2377 * a dictionary) from the current input method, provided by it calling 2378 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2379 * implementation flashes the background of the corrected word to provide feedback to the user. 2380 * 2381 * @param info The auto correct info about the text that was corrected. 2382 */ 2383 public void onCommitCorrection(CorrectionInfo info) { 2384 if (mCorrectionHighlighter == null) { 2385 mCorrectionHighlighter = new CorrectionHighlighter(); 2386 } else { 2387 mCorrectionHighlighter.invalidate(false); 2388 } 2389 2390 mCorrectionHighlighter.highlight(info); 2391 mUndoInputFilter.freezeLastEdit(); 2392 } 2393 2394 void onScrollChanged() { 2395 if (mPositionListener != null) { 2396 mPositionListener.onScrollChanged(); 2397 } 2398 if (mTextActionMode != null) { 2399 mTextActionMode.invalidateContentRect(); 2400 } 2401 } 2402 2403 /** 2404 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2405 */ 2406 private boolean shouldBlink() { 2407 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2408 2409 final int start = mTextView.getSelectionStart(); 2410 if (start < 0) return false; 2411 2412 final int end = mTextView.getSelectionEnd(); 2413 if (end < 0) return false; 2414 2415 return start == end; 2416 } 2417 2418 void makeBlink() { 2419 if (shouldBlink()) { 2420 mShowCursor = SystemClock.uptimeMillis(); 2421 if (mBlink == null) mBlink = new Blink(); 2422 mTextView.removeCallbacks(mBlink); 2423 mTextView.postDelayed(mBlink, BLINK); 2424 } else { 2425 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2426 } 2427 } 2428 2429 private class Blink implements Runnable { 2430 private boolean mCancelled; 2431 2432 public void run() { 2433 if (mCancelled) { 2434 return; 2435 } 2436 2437 mTextView.removeCallbacks(this); 2438 2439 if (shouldBlink()) { 2440 if (mTextView.getLayout() != null) { 2441 mTextView.invalidateCursorPath(); 2442 } 2443 2444 mTextView.postDelayed(this, BLINK); 2445 } 2446 } 2447 2448 void cancel() { 2449 if (!mCancelled) { 2450 mTextView.removeCallbacks(this); 2451 mCancelled = true; 2452 } 2453 } 2454 2455 void uncancel() { 2456 mCancelled = false; 2457 } 2458 } 2459 2460 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2461 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2462 com.android.internal.R.layout.text_drag_thumbnail, null); 2463 2464 if (shadowView == null) { 2465 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2466 } 2467 2468 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2469 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2470 end = TextUtils.unpackRangeEndFromLong(range); 2471 } 2472 final CharSequence text = mTextView.getTransformedText(start, end); 2473 shadowView.setText(text); 2474 shadowView.setTextColor(mTextView.getTextColors()); 2475 2476 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2477 shadowView.setGravity(Gravity.CENTER); 2478 2479 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2480 ViewGroup.LayoutParams.WRAP_CONTENT)); 2481 2482 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2483 shadowView.measure(size, size); 2484 2485 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2486 shadowView.invalidate(); 2487 return new DragShadowBuilder(shadowView); 2488 } 2489 2490 private static class DragLocalState { 2491 public TextView sourceTextView; 2492 public int start, end; 2493 2494 public DragLocalState(TextView sourceTextView, int start, int end) { 2495 this.sourceTextView = sourceTextView; 2496 this.start = start; 2497 this.end = end; 2498 } 2499 } 2500 2501 void onDrop(DragEvent event) { 2502 SpannableStringBuilder content = new SpannableStringBuilder(); 2503 2504 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2505 if (permissions != null) { 2506 permissions.takeTransient(); 2507 } 2508 2509 try { 2510 ClipData clipData = event.getClipData(); 2511 final int itemCount = clipData.getItemCount(); 2512 for (int i = 0; i < itemCount; i++) { 2513 Item item = clipData.getItemAt(i); 2514 content.append(item.coerceToStyledText(mTextView.getContext())); 2515 } 2516 } finally { 2517 if (permissions != null) { 2518 permissions.release(); 2519 } 2520 } 2521 2522 mTextView.beginBatchEdit(); 2523 mUndoInputFilter.freezeLastEdit(); 2524 try { 2525 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2526 Object localState = event.getLocalState(); 2527 DragLocalState dragLocalState = null; 2528 if (localState instanceof DragLocalState) { 2529 dragLocalState = (DragLocalState) localState; 2530 } 2531 boolean dragDropIntoItself = dragLocalState != null 2532 && dragLocalState.sourceTextView == mTextView; 2533 2534 if (dragDropIntoItself) { 2535 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2536 // A drop inside the original selection discards the drop. 2537 return; 2538 } 2539 } 2540 2541 final int originalLength = mTextView.getText().length(); 2542 int min = offset; 2543 int max = offset; 2544 2545 Selection.setSelection((Spannable) mTextView.getText(), max); 2546 mTextView.replaceText_internal(min, max, content); 2547 2548 if (dragDropIntoItself) { 2549 int dragSourceStart = dragLocalState.start; 2550 int dragSourceEnd = dragLocalState.end; 2551 if (max <= dragSourceStart) { 2552 // Inserting text before selection has shifted positions 2553 final int shift = mTextView.getText().length() - originalLength; 2554 dragSourceStart += shift; 2555 dragSourceEnd += shift; 2556 } 2557 2558 // Delete original selection 2559 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2560 2561 // Make sure we do not leave two adjacent spaces. 2562 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2563 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2564 if (nextCharIdx > prevCharIdx + 1) { 2565 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2566 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2567 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2568 } 2569 } 2570 } 2571 } finally { 2572 mTextView.endBatchEdit(); 2573 mUndoInputFilter.freezeLastEdit(); 2574 } 2575 } 2576 2577 public void addSpanWatchers(Spannable text) { 2578 final int textLength = text.length(); 2579 2580 if (mKeyListener != null) { 2581 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2582 } 2583 2584 if (mSpanController == null) { 2585 mSpanController = new SpanController(); 2586 } 2587 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2588 } 2589 2590 void setContextMenuAnchor(float x, float y) { 2591 mContextMenuAnchorX = x; 2592 mContextMenuAnchorY = y; 2593 } 2594 2595 void onCreateContextMenu(ContextMenu menu) { 2596 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2597 || Float.isNaN(mContextMenuAnchorY)) { 2598 return; 2599 } 2600 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2601 if (offset == -1) { 2602 return; 2603 } 2604 2605 stopTextActionModeWithPreservingSelection(); 2606 if (mTextView.canSelectText()) { 2607 final boolean isOnSelection = mTextView.hasSelection() 2608 && offset >= mTextView.getSelectionStart() 2609 && offset <= mTextView.getSelectionEnd(); 2610 if (!isOnSelection) { 2611 // Right clicked position is not on the selection. Remove the selection and move the 2612 // cursor to the right clicked position. 2613 Selection.setSelection((Spannable) mTextView.getText(), offset); 2614 stopTextActionMode(); 2615 } 2616 } 2617 2618 if (shouldOfferToShowSuggestions()) { 2619 final SuggestionInfo[] suggestionInfoArray = 2620 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2621 for (int i = 0; i < suggestionInfoArray.length; i++) { 2622 suggestionInfoArray[i] = new SuggestionInfo(); 2623 } 2624 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2625 com.android.internal.R.string.replace); 2626 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2627 for (int i = 0; i < numItems; i++) { 2628 final SuggestionInfo info = suggestionInfoArray[i]; 2629 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2630 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2631 @Override 2632 public boolean onMenuItemClick(MenuItem item) { 2633 replaceWithSuggestion(info); 2634 return true; 2635 } 2636 }); 2637 } 2638 } 2639 2640 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2641 com.android.internal.R.string.undo) 2642 .setAlphabeticShortcut('z') 2643 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2644 .setEnabled(mTextView.canUndo()); 2645 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2646 com.android.internal.R.string.redo) 2647 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2648 .setEnabled(mTextView.canRedo()); 2649 2650 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2651 com.android.internal.R.string.cut) 2652 .setAlphabeticShortcut('x') 2653 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2654 .setEnabled(mTextView.canCut()); 2655 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2656 com.android.internal.R.string.copy) 2657 .setAlphabeticShortcut('c') 2658 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2659 .setEnabled(mTextView.canCopy()); 2660 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2661 com.android.internal.R.string.paste) 2662 .setAlphabeticShortcut('v') 2663 .setEnabled(mTextView.canPaste()) 2664 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2665 menu.add(Menu.NONE, TextView.ID_PASTE_AS_PLAIN_TEXT, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2666 com.android.internal.R.string.paste_as_plain_text) 2667 .setEnabled(mTextView.canPasteAsPlainText()) 2668 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2669 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2670 com.android.internal.R.string.share) 2671 .setEnabled(mTextView.canShare()) 2672 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2673 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2674 com.android.internal.R.string.selectAll) 2675 .setAlphabeticShortcut('a') 2676 .setEnabled(mTextView.canSelectAllText()) 2677 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2678 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2679 android.R.string.autofill) 2680 .setEnabled(mTextView.canRequestAutofill()) 2681 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2682 2683 mPreserveSelection = true; 2684 } 2685 2686 @Nullable 2687 private SuggestionSpan findEquivalentSuggestionSpan( 2688 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2689 final Editable editable = (Editable) mTextView.getText(); 2690 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2691 // Exactly same span is found. 2692 return suggestionSpanInfo.mSuggestionSpan; 2693 } 2694 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2695 // contents. 2696 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2697 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2698 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2699 final int start = editable.getSpanStart(suggestionSpan); 2700 if (start != suggestionSpanInfo.mSpanStart) { 2701 continue; 2702 } 2703 final int end = editable.getSpanEnd(suggestionSpan); 2704 if (end != suggestionSpanInfo.mSpanEnd) { 2705 continue; 2706 } 2707 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2708 return suggestionSpan; 2709 } 2710 } 2711 return null; 2712 } 2713 2714 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2715 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2716 suggestionInfo.mSuggestionSpanInfo); 2717 if (targetSuggestionSpan == null) { 2718 // Span has been removed 2719 return; 2720 } 2721 final Editable editable = (Editable) mTextView.getText(); 2722 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2723 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2724 if (spanStart < 0 || spanEnd <= spanStart) { 2725 // Span has been removed 2726 return; 2727 } 2728 2729 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2730 // SuggestionSpans are removed by replace: save them before 2731 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2732 SuggestionSpan.class); 2733 final int length = suggestionSpans.length; 2734 int[] suggestionSpansStarts = new int[length]; 2735 int[] suggestionSpansEnds = new int[length]; 2736 int[] suggestionSpansFlags = new int[length]; 2737 for (int i = 0; i < length; i++) { 2738 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2739 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2740 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2741 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2742 2743 // Remove potential misspelled flags 2744 int suggestionSpanFlags = suggestionSpan.getFlags(); 2745 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2746 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2747 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2748 suggestionSpan.setFlags(suggestionSpanFlags); 2749 } 2750 } 2751 2752 // Notify source IME of the suggestion pick. Do this before swapping texts. 2753 targetSuggestionSpan.notifySelection( 2754 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2755 2756 // Swap text content between actual text and Suggestion span 2757 final int suggestionStart = suggestionInfo.mSuggestionStart; 2758 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2759 final String suggestion = suggestionInfo.mText.subSequence( 2760 suggestionStart, suggestionEnd).toString(); 2761 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2762 2763 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2764 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2765 2766 // Restore previous SuggestionSpans 2767 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2768 for (int i = 0; i < length; i++) { 2769 // Only spans that include the modified region make sense after replacement 2770 // Spans partially included in the replaced region are removed, there is no 2771 // way to assign them a valid range after replacement 2772 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2773 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2774 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2775 } 2776 } 2777 // Move cursor at the end of the replaced word 2778 final int newCursorPosition = spanEnd + lengthDelta; 2779 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2780 } 2781 2782 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2783 new MenuItem.OnMenuItemClickListener() { 2784 @Override 2785 public boolean onMenuItemClick(MenuItem item) { 2786 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2787 return true; 2788 } 2789 return mTextView.onTextContextMenuItem(item.getItemId()); 2790 } 2791 }; 2792 2793 /** 2794 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2795 * pop-up should be displayed. 2796 * Also monitors {@link Selection} to call back to the attached input method. 2797 */ 2798 private class SpanController implements SpanWatcher { 2799 2800 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2801 2802 private EasyEditPopupWindow mPopupWindow; 2803 2804 private Runnable mHidePopup; 2805 2806 // This function is pure but inner classes can't have static functions 2807 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2808 final Object span) { 2809 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2810 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2811 } 2812 2813 @Override 2814 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2815 if (isNonIntermediateSelectionSpan(text, span)) { 2816 sendUpdateSelection(); 2817 } else if (span instanceof EasyEditSpan) { 2818 if (mPopupWindow == null) { 2819 mPopupWindow = new EasyEditPopupWindow(); 2820 mHidePopup = new Runnable() { 2821 @Override 2822 public void run() { 2823 hide(); 2824 } 2825 }; 2826 } 2827 2828 // Make sure there is only at most one EasyEditSpan in the text 2829 if (mPopupWindow.mEasyEditSpan != null) { 2830 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2831 } 2832 2833 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2834 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2835 @Override 2836 public void onDeleteClick(EasyEditSpan span) { 2837 Editable editable = (Editable) mTextView.getText(); 2838 int start = editable.getSpanStart(span); 2839 int end = editable.getSpanEnd(span); 2840 if (start >= 0 && end >= 0) { 2841 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2842 mTextView.deleteText_internal(start, end); 2843 } 2844 editable.removeSpan(span); 2845 } 2846 }); 2847 2848 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2849 // The window is not visible yet, ignore the text change. 2850 return; 2851 } 2852 2853 if (mTextView.getLayout() == null) { 2854 // The view has not been laid out yet, ignore the text change 2855 return; 2856 } 2857 2858 if (extractedTextModeWillBeStarted()) { 2859 // The input is in extract mode. Do not handle the easy edit in 2860 // the original TextView, as the ExtractEditText will do 2861 return; 2862 } 2863 2864 mPopupWindow.show(); 2865 mTextView.removeCallbacks(mHidePopup); 2866 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2867 } 2868 } 2869 2870 @Override 2871 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2872 if (isNonIntermediateSelectionSpan(text, span)) { 2873 sendUpdateSelection(); 2874 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2875 hide(); 2876 } 2877 } 2878 2879 @Override 2880 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2881 int newStart, int newEnd) { 2882 if (isNonIntermediateSelectionSpan(text, span)) { 2883 sendUpdateSelection(); 2884 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2885 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2886 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2887 text.removeSpan(easyEditSpan); 2888 } 2889 } 2890 2891 public void hide() { 2892 if (mPopupWindow != null) { 2893 mPopupWindow.hide(); 2894 mTextView.removeCallbacks(mHidePopup); 2895 } 2896 } 2897 2898 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2899 try { 2900 PendingIntent pendingIntent = span.getPendingIntent(); 2901 if (pendingIntent != null) { 2902 Intent intent = new Intent(); 2903 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2904 pendingIntent.send(mTextView.getContext(), 0, intent); 2905 } 2906 } catch (CanceledException e) { 2907 // This should not happen, as we should try to send the intent only once. 2908 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2909 } 2910 } 2911 } 2912 2913 /** 2914 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2915 */ 2916 private interface EasyEditDeleteListener { 2917 2918 /** 2919 * Clicks the delete pop-up. 2920 */ 2921 void onDeleteClick(EasyEditSpan span); 2922 } 2923 2924 /** 2925 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2926 * by {@link SpanController}. 2927 */ 2928 private class EasyEditPopupWindow extends PinnedPopupWindow 2929 implements OnClickListener { 2930 private static final int POPUP_TEXT_LAYOUT = 2931 com.android.internal.R.layout.text_edit_action_popup_text; 2932 private TextView mDeleteTextView; 2933 private EasyEditSpan mEasyEditSpan; 2934 private EasyEditDeleteListener mOnDeleteListener; 2935 2936 @Override 2937 protected void createPopupWindow() { 2938 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2939 com.android.internal.R.attr.textSelectHandleWindowStyle); 2940 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2941 mPopupWindow.setClippingEnabled(true); 2942 } 2943 2944 @Override 2945 protected void initContentView() { 2946 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2947 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2948 mContentView = linearLayout; 2949 mContentView.setBackgroundResource( 2950 com.android.internal.R.drawable.text_edit_side_paste_window); 2951 2952 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 2953 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2954 2955 LayoutParams wrapContent = new LayoutParams( 2956 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2957 2958 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2959 mDeleteTextView.setLayoutParams(wrapContent); 2960 mDeleteTextView.setText(com.android.internal.R.string.delete); 2961 mDeleteTextView.setOnClickListener(this); 2962 mContentView.addView(mDeleteTextView); 2963 } 2964 2965 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2966 mEasyEditSpan = easyEditSpan; 2967 } 2968 2969 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2970 mOnDeleteListener = listener; 2971 } 2972 2973 @Override 2974 public void onClick(View view) { 2975 if (view == mDeleteTextView 2976 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2977 && mOnDeleteListener != null) { 2978 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2979 } 2980 } 2981 2982 @Override 2983 public void hide() { 2984 if (mEasyEditSpan != null) { 2985 mEasyEditSpan.setDeleteEnabled(false); 2986 } 2987 mOnDeleteListener = null; 2988 super.hide(); 2989 } 2990 2991 @Override 2992 protected int getTextOffset() { 2993 // Place the pop-up at the end of the span 2994 Editable editable = (Editable) mTextView.getText(); 2995 return editable.getSpanEnd(mEasyEditSpan); 2996 } 2997 2998 @Override 2999 protected int getVerticalLocalPosition(int line) { 3000 final Layout layout = mTextView.getLayout(); 3001 return layout.getLineBottomWithoutSpacing(line); 3002 } 3003 3004 @Override 3005 protected int clipVertically(int positionY) { 3006 // As we display the pop-up below the span, no vertical clipping is required. 3007 return positionY; 3008 } 3009 } 3010 3011 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 3012 // 3 handles 3013 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 3014 // 1 CursorAnchorInfoNotifier 3015 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 3016 private TextViewPositionListener[] mPositionListeners = 3017 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 3018 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 3019 private boolean mPositionHasChanged = true; 3020 // Absolute position of the TextView with respect to its parent window 3021 private int mPositionX, mPositionY; 3022 private int mPositionXOnScreen, mPositionYOnScreen; 3023 private int mNumberOfListeners; 3024 private boolean mScrollHasChanged; 3025 final int[] mTempCoords = new int[2]; 3026 3027 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 3028 if (mNumberOfListeners == 0) { 3029 updatePosition(); 3030 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3031 vto.addOnPreDrawListener(this); 3032 } 3033 3034 int emptySlotIndex = -1; 3035 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3036 TextViewPositionListener listener = mPositionListeners[i]; 3037 if (listener == positionListener) { 3038 return; 3039 } else if (emptySlotIndex < 0 && listener == null) { 3040 emptySlotIndex = i; 3041 } 3042 } 3043 3044 mPositionListeners[emptySlotIndex] = positionListener; 3045 mCanMove[emptySlotIndex] = canMove; 3046 mNumberOfListeners++; 3047 } 3048 3049 public void removeSubscriber(TextViewPositionListener positionListener) { 3050 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3051 if (mPositionListeners[i] == positionListener) { 3052 mPositionListeners[i] = null; 3053 mNumberOfListeners--; 3054 break; 3055 } 3056 } 3057 3058 if (mNumberOfListeners == 0) { 3059 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3060 vto.removeOnPreDrawListener(this); 3061 } 3062 } 3063 3064 public int getPositionX() { 3065 return mPositionX; 3066 } 3067 3068 public int getPositionY() { 3069 return mPositionY; 3070 } 3071 3072 public int getPositionXOnScreen() { 3073 return mPositionXOnScreen; 3074 } 3075 3076 public int getPositionYOnScreen() { 3077 return mPositionYOnScreen; 3078 } 3079 3080 @Override 3081 public boolean onPreDraw() { 3082 updatePosition(); 3083 3084 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3085 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3086 TextViewPositionListener positionListener = mPositionListeners[i]; 3087 if (positionListener != null) { 3088 positionListener.updatePosition(mPositionX, mPositionY, 3089 mPositionHasChanged, mScrollHasChanged); 3090 } 3091 } 3092 } 3093 3094 mScrollHasChanged = false; 3095 return true; 3096 } 3097 3098 private void updatePosition() { 3099 mTextView.getLocationInWindow(mTempCoords); 3100 3101 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3102 3103 mPositionX = mTempCoords[0]; 3104 mPositionY = mTempCoords[1]; 3105 3106 mTextView.getLocationOnScreen(mTempCoords); 3107 3108 mPositionXOnScreen = mTempCoords[0]; 3109 mPositionYOnScreen = mTempCoords[1]; 3110 } 3111 3112 public void onScrollChanged() { 3113 mScrollHasChanged = true; 3114 } 3115 } 3116 3117 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3118 protected PopupWindow mPopupWindow; 3119 protected ViewGroup mContentView; 3120 int mPositionX, mPositionY; 3121 int mClippingLimitLeft, mClippingLimitRight; 3122 3123 protected abstract void createPopupWindow(); 3124 protected abstract void initContentView(); 3125 protected abstract int getTextOffset(); 3126 protected abstract int getVerticalLocalPosition(int line); 3127 protected abstract int clipVertically(int positionY); 3128 protected void setUp() { 3129 } 3130 3131 public PinnedPopupWindow() { 3132 // Due to calling subclass methods in base constructor, subclass constructor is not 3133 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3134 // a chance to initialize subclasses, call setUp() method here. 3135 // TODO: It is good to extract non trivial initialization code from constructor. 3136 setUp(); 3137 3138 createPopupWindow(); 3139 3140 mPopupWindow.setWindowLayoutType( 3141 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3142 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3143 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3144 3145 initContentView(); 3146 3147 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3148 ViewGroup.LayoutParams.WRAP_CONTENT); 3149 mContentView.setLayoutParams(wrapContent); 3150 3151 mPopupWindow.setContentView(mContentView); 3152 } 3153 3154 public void show() { 3155 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3156 3157 computeLocalPosition(); 3158 3159 final PositionListener positionListener = getPositionListener(); 3160 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3161 } 3162 3163 protected void measureContent() { 3164 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3165 mContentView.measure( 3166 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3167 View.MeasureSpec.AT_MOST), 3168 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3169 View.MeasureSpec.AT_MOST)); 3170 } 3171 3172 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3173 * positioned according to viewportToContentHorizontalOffset. 3174 * 3175 * This method assumes that mContentView has properly been measured from its content. */ 3176 private void computeLocalPosition() { 3177 measureContent(); 3178 final int width = mContentView.getMeasuredWidth(); 3179 final int offset = getTextOffset(); 3180 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3181 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3182 3183 final int line = mTextView.getLayout().getLineForOffset(offset); 3184 mPositionY = getVerticalLocalPosition(line); 3185 mPositionY += mTextView.viewportToContentVerticalOffset(); 3186 } 3187 3188 private void updatePosition(int parentPositionX, int parentPositionY) { 3189 int positionX = parentPositionX + mPositionX; 3190 int positionY = parentPositionY + mPositionY; 3191 3192 positionY = clipVertically(positionY); 3193 3194 // Horizontal clipping 3195 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3196 final int width = mContentView.getMeasuredWidth(); 3197 positionX = Math.min( 3198 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3199 positionX = Math.max(-mClippingLimitLeft, positionX); 3200 3201 if (isShowing()) { 3202 mPopupWindow.update(positionX, positionY, -1, -1); 3203 } else { 3204 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3205 positionX, positionY); 3206 } 3207 } 3208 3209 public void hide() { 3210 if (!isShowing()) { 3211 return; 3212 } 3213 mPopupWindow.dismiss(); 3214 getPositionListener().removeSubscriber(this); 3215 } 3216 3217 @Override 3218 public void updatePosition(int parentPositionX, int parentPositionY, 3219 boolean parentPositionChanged, boolean parentScrolled) { 3220 // Either parentPositionChanged or parentScrolled is true, check if still visible 3221 if (isShowing() && isOffsetVisible(getTextOffset())) { 3222 if (parentScrolled) computeLocalPosition(); 3223 updatePosition(parentPositionX, parentPositionY); 3224 } else { 3225 hide(); 3226 } 3227 } 3228 3229 public boolean isShowing() { 3230 return mPopupWindow.isShowing(); 3231 } 3232 } 3233 3234 private static final class SuggestionInfo { 3235 // Range of actual suggestion within mText 3236 int mSuggestionStart, mSuggestionEnd; 3237 3238 // The SuggestionSpan that this TextView represents 3239 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3240 3241 // The index of this suggestion inside suggestionSpan 3242 int mSuggestionIndex; 3243 3244 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3245 3246 void clear() { 3247 mSuggestionSpanInfo.clear(); 3248 mText.clear(); 3249 } 3250 3251 // Utility method to set attributes about a SuggestionSpan. 3252 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3253 mSuggestionSpanInfo.mSuggestionSpan = span; 3254 mSuggestionSpanInfo.mSpanStart = spanStart; 3255 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3256 } 3257 } 3258 3259 private static final class SuggestionSpanInfo { 3260 // The SuggestionSpan; 3261 @Nullable 3262 SuggestionSpan mSuggestionSpan; 3263 3264 // The SuggestionSpan start position 3265 int mSpanStart; 3266 3267 // The SuggestionSpan end position 3268 int mSpanEnd; 3269 3270 void clear() { 3271 mSuggestionSpan = null; 3272 } 3273 } 3274 3275 private class SuggestionHelper { 3276 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3277 new SuggestionSpanComparator(); 3278 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3279 new HashMap<SuggestionSpan, Integer>(); 3280 3281 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3282 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3283 final int flag1 = span1.getFlags(); 3284 final int flag2 = span2.getFlags(); 3285 if (flag1 != flag2) { 3286 // The order here should match what is used in updateDrawState 3287 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3288 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3289 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3290 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3291 if (easy1 && !misspelled1) return -1; 3292 if (easy2 && !misspelled2) return 1; 3293 if (misspelled1) return -1; 3294 if (misspelled2) return 1; 3295 } 3296 3297 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3298 } 3299 } 3300 3301 /** 3302 * Returns the suggestion spans that cover the current cursor position. The suggestion 3303 * spans are sorted according to the length of text that they are attached to. 3304 */ 3305 private SuggestionSpan[] getSortedSuggestionSpans() { 3306 int pos = mTextView.getSelectionStart(); 3307 Spannable spannable = (Spannable) mTextView.getText(); 3308 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3309 3310 mSpansLengths.clear(); 3311 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3312 int start = spannable.getSpanStart(suggestionSpan); 3313 int end = spannable.getSpanEnd(suggestionSpan); 3314 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3315 } 3316 3317 // The suggestions are sorted according to their types (easy correction first, then 3318 // misspelled) and to the length of the text that they cover (shorter first). 3319 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3320 mSpansLengths.clear(); 3321 3322 return suggestionSpans; 3323 } 3324 3325 /** 3326 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3327 * position. 3328 * 3329 * @param suggestionInfos SuggestionInfo array the results will be set. 3330 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3331 * @return the number of suggestions actually fetched. 3332 */ 3333 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3334 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3335 final Spannable spannable = (Spannable) mTextView.getText(); 3336 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3337 final int nbSpans = suggestionSpans.length; 3338 if (nbSpans == 0) return 0; 3339 3340 int numberOfSuggestions = 0; 3341 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3342 final int spanStart = spannable.getSpanStart(suggestionSpan); 3343 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3344 3345 if (misspelledSpanInfo != null 3346 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3347 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3348 misspelledSpanInfo.mSpanStart = spanStart; 3349 misspelledSpanInfo.mSpanEnd = spanEnd; 3350 } 3351 3352 final String[] suggestions = suggestionSpan.getSuggestions(); 3353 final int nbSuggestions = suggestions.length; 3354 suggestionLoop: 3355 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3356 final String suggestion = suggestions[suggestionIndex]; 3357 for (int i = 0; i < numberOfSuggestions; i++) { 3358 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3359 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3360 final int otherSpanStart = 3361 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3362 final int otherSpanEnd = 3363 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3364 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3365 continue suggestionLoop; 3366 } 3367 } 3368 } 3369 3370 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3371 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3372 suggestionInfo.mSuggestionIndex = suggestionIndex; 3373 suggestionInfo.mSuggestionStart = 0; 3374 suggestionInfo.mSuggestionEnd = suggestion.length(); 3375 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3376 numberOfSuggestions++; 3377 if (numberOfSuggestions >= suggestionInfos.length) { 3378 return numberOfSuggestions; 3379 } 3380 } 3381 } 3382 return numberOfSuggestions; 3383 } 3384 } 3385 3386 @VisibleForTesting 3387 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3388 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3389 3390 // Key of intent extras for inserting new word into user dictionary. 3391 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3392 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3393 3394 private SuggestionInfo[] mSuggestionInfos; 3395 private int mNumberOfSuggestions; 3396 private boolean mCursorWasVisibleBeforeSuggestions; 3397 private boolean mIsShowingUp = false; 3398 private SuggestionAdapter mSuggestionsAdapter; 3399 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3400 private TextView mAddToDictionaryButton; 3401 private TextView mDeleteButton; 3402 private ListView mSuggestionListView; 3403 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3404 private int mContainerMarginWidth; 3405 private int mContainerMarginTop; 3406 private LinearLayout mContainerView; 3407 private Context mContext; // TODO: Make mContext final. 3408 3409 private class CustomPopupWindow extends PopupWindow { 3410 3411 @Override 3412 public void dismiss() { 3413 if (!isShowing()) { 3414 return; 3415 } 3416 super.dismiss(); 3417 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3418 3419 // Safe cast since show() checks that mTextView.getText() is an Editable 3420 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3421 3422 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3423 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3424 getInsertionController().show(); 3425 } 3426 } 3427 } 3428 3429 public SuggestionsPopupWindow() { 3430 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3431 } 3432 3433 @Override 3434 protected void setUp() { 3435 mContext = applyDefaultTheme(mTextView.getContext()); 3436 mHighlightSpan = new TextAppearanceSpan(mContext, 3437 mTextView.mTextEditSuggestionHighlightStyle); 3438 } 3439 3440 private Context applyDefaultTheme(Context originalContext) { 3441 TypedArray a = originalContext.obtainStyledAttributes( 3442 new int[]{com.android.internal.R.attr.isLightTheme}); 3443 boolean isLightTheme = a.getBoolean(0, true); 3444 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3445 : R.style.ThemeOverlay_Material_Dark; 3446 a.recycle(); 3447 return new ContextThemeWrapper(originalContext, themeId); 3448 } 3449 3450 @Override 3451 protected void createPopupWindow() { 3452 mPopupWindow = new CustomPopupWindow(); 3453 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3454 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3455 mPopupWindow.setFocusable(true); 3456 mPopupWindow.setClippingEnabled(false); 3457 } 3458 3459 @Override 3460 protected void initContentView() { 3461 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3462 Context.LAYOUT_INFLATER_SERVICE); 3463 mContentView = (ViewGroup) inflater.inflate( 3464 mTextView.mTextEditSuggestionContainerLayout, null); 3465 3466 mContainerView = (LinearLayout) mContentView.findViewById( 3467 com.android.internal.R.id.suggestionWindowContainer); 3468 ViewGroup.MarginLayoutParams lp = 3469 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3470 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3471 mContainerMarginTop = lp.topMargin; 3472 mClippingLimitLeft = lp.leftMargin; 3473 mClippingLimitRight = lp.rightMargin; 3474 3475 mSuggestionListView = (ListView) mContentView.findViewById( 3476 com.android.internal.R.id.suggestionContainer); 3477 3478 mSuggestionsAdapter = new SuggestionAdapter(); 3479 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3480 mSuggestionListView.setOnItemClickListener(this); 3481 3482 // Inflate the suggestion items once and for all. 3483 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3484 for (int i = 0; i < mSuggestionInfos.length; i++) { 3485 mSuggestionInfos[i] = new SuggestionInfo(); 3486 } 3487 3488 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3489 com.android.internal.R.id.addToDictionaryButton); 3490 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3491 public void onClick(View v) { 3492 final SuggestionSpan misspelledSpan = 3493 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3494 if (misspelledSpan == null) { 3495 // Span has been removed. 3496 return; 3497 } 3498 final Editable editable = (Editable) mTextView.getText(); 3499 final int spanStart = editable.getSpanStart(misspelledSpan); 3500 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3501 if (spanStart < 0 || spanEnd <= spanStart) { 3502 return; 3503 } 3504 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3505 3506 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3507 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3508 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3509 mTextView.getTextServicesLocale().toString()); 3510 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3511 mTextView.getContext().startActivity(intent); 3512 // There is no way to know if the word was indeed added. Re-check. 3513 // TODO The ExtractEditText should remove the span in the original text instead 3514 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3515 Selection.setSelection(editable, spanEnd); 3516 updateSpellCheckSpans(spanStart, spanEnd, false); 3517 hideWithCleanUp(); 3518 } 3519 }); 3520 3521 mDeleteButton = (TextView) mContentView.findViewById( 3522 com.android.internal.R.id.deleteButton); 3523 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3524 public void onClick(View v) { 3525 final Editable editable = (Editable) mTextView.getText(); 3526 3527 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3528 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3529 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3530 // Do not leave two adjacent spaces after deletion, or one at beginning of 3531 // text 3532 if (spanUnionEnd < editable.length() 3533 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3534 && (spanUnionStart == 0 3535 || Character.isSpaceChar( 3536 editable.charAt(spanUnionStart - 1)))) { 3537 spanUnionEnd = spanUnionEnd + 1; 3538 } 3539 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3540 } 3541 hideWithCleanUp(); 3542 } 3543 }); 3544 3545 } 3546 3547 public boolean isShowingUp() { 3548 return mIsShowingUp; 3549 } 3550 3551 public void onParentLostFocus() { 3552 mIsShowingUp = false; 3553 } 3554 3555 private class SuggestionAdapter extends BaseAdapter { 3556 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3557 Context.LAYOUT_INFLATER_SERVICE); 3558 3559 @Override 3560 public int getCount() { 3561 return mNumberOfSuggestions; 3562 } 3563 3564 @Override 3565 public Object getItem(int position) { 3566 return mSuggestionInfos[position]; 3567 } 3568 3569 @Override 3570 public long getItemId(int position) { 3571 return position; 3572 } 3573 3574 @Override 3575 public View getView(int position, View convertView, ViewGroup parent) { 3576 TextView textView = (TextView) convertView; 3577 3578 if (textView == null) { 3579 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3580 parent, false); 3581 } 3582 3583 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3584 textView.setText(suggestionInfo.mText); 3585 return textView; 3586 } 3587 } 3588 3589 @VisibleForTesting 3590 public ViewGroup getContentViewForTesting() { 3591 return mContentView; 3592 } 3593 3594 @Override 3595 public void show() { 3596 if (!(mTextView.getText() instanceof Editable)) return; 3597 if (extractedTextModeWillBeStarted()) { 3598 return; 3599 } 3600 3601 if (updateSuggestions()) { 3602 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3603 mTextView.setCursorVisible(false); 3604 mIsShowingUp = true; 3605 super.show(); 3606 } 3607 } 3608 3609 @Override 3610 protected void measureContent() { 3611 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3612 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3613 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3614 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3615 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3616 3617 int width = 0; 3618 View view = null; 3619 for (int i = 0; i < mNumberOfSuggestions; i++) { 3620 view = mSuggestionsAdapter.getView(i, view, mContentView); 3621 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3622 view.measure(horizontalMeasure, verticalMeasure); 3623 width = Math.max(width, view.getMeasuredWidth()); 3624 } 3625 3626 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3627 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3628 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3629 } 3630 3631 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3632 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3633 3634 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3635 + mContainerMarginWidth; 3636 3637 // Enforce the width based on actual text widths 3638 mContentView.measure( 3639 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3640 verticalMeasure); 3641 3642 Drawable popupBackground = mPopupWindow.getBackground(); 3643 if (popupBackground != null) { 3644 if (mTempRect == null) mTempRect = new Rect(); 3645 popupBackground.getPadding(mTempRect); 3646 width += mTempRect.left + mTempRect.right; 3647 } 3648 mPopupWindow.setWidth(width); 3649 } 3650 3651 @Override 3652 protected int getTextOffset() { 3653 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3654 } 3655 3656 @Override 3657 protected int getVerticalLocalPosition(int line) { 3658 final Layout layout = mTextView.getLayout(); 3659 return layout.getLineBottomWithoutSpacing(line) - mContainerMarginTop; 3660 } 3661 3662 @Override 3663 protected int clipVertically(int positionY) { 3664 final int height = mContentView.getMeasuredHeight(); 3665 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3666 return Math.min(positionY, displayMetrics.heightPixels - height); 3667 } 3668 3669 private void hideWithCleanUp() { 3670 for (final SuggestionInfo info : mSuggestionInfos) { 3671 info.clear(); 3672 } 3673 mMisspelledSpanInfo.clear(); 3674 hide(); 3675 } 3676 3677 private boolean updateSuggestions() { 3678 Spannable spannable = (Spannable) mTextView.getText(); 3679 mNumberOfSuggestions = 3680 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3681 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3682 return false; 3683 } 3684 3685 int spanUnionStart = mTextView.getText().length(); 3686 int spanUnionEnd = 0; 3687 3688 for (int i = 0; i < mNumberOfSuggestions; i++) { 3689 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3690 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3691 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3692 } 3693 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3694 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3695 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3696 } 3697 3698 for (int i = 0; i < mNumberOfSuggestions; i++) { 3699 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3700 } 3701 3702 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3703 int addToDictionaryButtonVisibility = View.GONE; 3704 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3705 if (mMisspelledSpanInfo.mSpanStart >= 0 3706 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3707 addToDictionaryButtonVisibility = View.VISIBLE; 3708 } 3709 } 3710 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3711 3712 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3713 final int underlineColor; 3714 if (mNumberOfSuggestions != 0) { 3715 underlineColor = 3716 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3717 } else { 3718 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3719 } 3720 3721 if (underlineColor == 0) { 3722 // Fallback on the default highlight color when the first span does not provide one 3723 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3724 } else { 3725 final float BACKGROUND_TRANSPARENCY = 0.4f; 3726 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3727 mSuggestionRangeSpan.setBackgroundColor( 3728 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3729 } 3730 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3731 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3732 3733 mSuggestionsAdapter.notifyDataSetChanged(); 3734 return true; 3735 } 3736 3737 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3738 int unionEnd) { 3739 final Spannable text = (Spannable) mTextView.getText(); 3740 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3741 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3742 3743 // Adjust the start/end of the suggestion span 3744 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3745 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3746 + suggestionInfo.mText.length(); 3747 3748 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3749 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3750 3751 // Add the text before and after the span. 3752 final String textAsString = text.toString(); 3753 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3754 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3755 } 3756 3757 @Override 3758 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3759 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3760 replaceWithSuggestion(suggestionInfo); 3761 hideWithCleanUp(); 3762 } 3763 } 3764 3765 /** 3766 * An ActionMode Callback class that is used to provide actions while in text insertion or 3767 * selection mode. 3768 * 3769 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3770 * actions, depending on which of these this TextView supports and the current selection. 3771 */ 3772 private class TextActionModeCallback extends ActionMode.Callback2 { 3773 private final Path mSelectionPath = new Path(); 3774 private final RectF mSelectionBounds = new RectF(); 3775 private final boolean mHasSelection; 3776 private final int mHandleHeight; 3777 3778 public TextActionModeCallback(boolean hasSelection) { 3779 mHasSelection = hasSelection; 3780 if (mHasSelection) { 3781 SelectionModifierCursorController selectionController = getSelectionController(); 3782 if (selectionController.mStartHandle == null) { 3783 // As these are for initializing selectionController, hide() must be called. 3784 selectionController.initDrawables(); 3785 selectionController.initHandles(); 3786 selectionController.hide(); 3787 } 3788 mHandleHeight = Math.max( 3789 mSelectHandleLeft.getMinimumHeight(), 3790 mSelectHandleRight.getMinimumHeight()); 3791 } else { 3792 InsertionPointCursorController insertionController = getInsertionController(); 3793 if (insertionController != null) { 3794 insertionController.getHandle(); 3795 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3796 } else { 3797 mHandleHeight = 0; 3798 } 3799 } 3800 } 3801 3802 @Override 3803 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3804 mode.setTitle(null); 3805 mode.setSubtitle(null); 3806 mode.setTitleOptionalHint(true); 3807 populateMenuWithItems(menu); 3808 3809 Callback customCallback = getCustomCallback(); 3810 if (customCallback != null) { 3811 if (!customCallback.onCreateActionMode(mode, menu)) { 3812 // The custom mode can choose to cancel the action mode, dismiss selection. 3813 Selection.setSelection((Spannable) mTextView.getText(), 3814 mTextView.getSelectionEnd()); 3815 return false; 3816 } 3817 } 3818 3819 if (mTextView.canProcessText()) { 3820 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3821 } 3822 3823 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3824 if (mHasSelection && !mTextView.hasTransientState()) { 3825 mTextView.setHasTransientState(true); 3826 } 3827 return true; 3828 } else { 3829 return false; 3830 } 3831 } 3832 3833 private Callback getCustomCallback() { 3834 return mHasSelection 3835 ? mCustomSelectionActionModeCallback 3836 : mCustomInsertionActionModeCallback; 3837 } 3838 3839 private void populateMenuWithItems(Menu menu) { 3840 if (mTextView.canCut()) { 3841 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3842 com.android.internal.R.string.cut) 3843 .setAlphabeticShortcut('x') 3844 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3845 } 3846 3847 if (mTextView.canCopy()) { 3848 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3849 com.android.internal.R.string.copy) 3850 .setAlphabeticShortcut('c') 3851 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3852 } 3853 3854 if (mTextView.canPaste()) { 3855 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3856 com.android.internal.R.string.paste) 3857 .setAlphabeticShortcut('v') 3858 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3859 } 3860 3861 if (mTextView.canShare()) { 3862 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3863 com.android.internal.R.string.share) 3864 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3865 } 3866 3867 if (mTextView.canRequestAutofill()) { 3868 final String selected = mTextView.getSelectedText(); 3869 if (selected == null || selected.isEmpty()) { 3870 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3871 com.android.internal.R.string.autofill) 3872 .setShowAsAction(MenuItem.SHOW_AS_OVERFLOW_ALWAYS); 3873 } 3874 } 3875 3876 if (mTextView.canPasteAsPlainText()) { 3877 menu.add( 3878 Menu.NONE, 3879 TextView.ID_PASTE_AS_PLAIN_TEXT, 3880 MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 3881 com.android.internal.R.string.paste_as_plain_text) 3882 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3883 } 3884 3885 updateSelectAllItem(menu); 3886 updateReplaceItem(menu); 3887 updateAssistMenuItem(menu); 3888 } 3889 3890 @Override 3891 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3892 updateSelectAllItem(menu); 3893 updateReplaceItem(menu); 3894 updateAssistMenuItem(menu); 3895 3896 Callback customCallback = getCustomCallback(); 3897 if (customCallback != null) { 3898 return customCallback.onPrepareActionMode(mode, menu); 3899 } 3900 return true; 3901 } 3902 3903 private void updateSelectAllItem(Menu menu) { 3904 boolean canSelectAll = mTextView.canSelectAllText(); 3905 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3906 if (canSelectAll && !selectAllItemExists) { 3907 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3908 com.android.internal.R.string.selectAll) 3909 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3910 } else if (!canSelectAll && selectAllItemExists) { 3911 menu.removeItem(TextView.ID_SELECT_ALL); 3912 } 3913 } 3914 3915 private void updateReplaceItem(Menu menu) { 3916 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3917 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3918 if (canReplace && !replaceItemExists) { 3919 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3920 com.android.internal.R.string.replace) 3921 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3922 } else if (!canReplace && replaceItemExists) { 3923 menu.removeItem(TextView.ID_REPLACE); 3924 } 3925 } 3926 3927 private void updateAssistMenuItem(Menu menu) { 3928 menu.removeItem(TextView.ID_ASSIST); 3929 final TextClassification textClassification = 3930 getSelectionActionModeHelper().getTextClassification(); 3931 if (canAssist()) { 3932 menu.add(TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, 3933 textClassification.getLabel()) 3934 .setIcon(textClassification.getIcon()) 3935 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3936 mMetricsLogger.write( 3937 new LogMaker(MetricsEvent.TEXT_SELECTION_MENU_ITEM_ASSIST) 3938 .setType(MetricsEvent.TYPE_OPEN) 3939 .setSubtype(textClassification.getLogType())); 3940 } 3941 } 3942 3943 private boolean canAssist() { 3944 final TextClassification textClassification = 3945 getSelectionActionModeHelper().getTextClassification(); 3946 return mTextView.isDeviceProvisioned() 3947 && textClassification != null 3948 && (textClassification.getIcon() != null 3949 || !TextUtils.isEmpty(textClassification.getLabel())) 3950 && (textClassification.getOnClickListener() != null 3951 || (textClassification.getIntent() != null 3952 && mTextView.getContext().canStartActivityForResult())); 3953 } 3954 3955 @Override 3956 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3957 getSelectionActionModeHelper().onSelectionAction(item.getItemId()); 3958 3959 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3960 return true; 3961 } 3962 Callback customCallback = getCustomCallback(); 3963 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3964 return true; 3965 } 3966 final TextClassification textClassification = 3967 getSelectionActionModeHelper().getTextClassification(); 3968 if (TextView.ID_ASSIST == item.getItemId() && textClassification != null) { 3969 final OnClickListener onClickListener = 3970 textClassification.getOnClickListener(); 3971 if (onClickListener != null) { 3972 onClickListener.onClick(mTextView); 3973 } else { 3974 final Intent intent = textClassification.getIntent(); 3975 if (intent != null) { 3976 TextClassification.createStartActivityOnClickListener( 3977 mTextView.getContext(), intent) 3978 .onClick(mTextView); 3979 } 3980 } 3981 mMetricsLogger.action( 3982 MetricsEvent.ACTION_TEXT_SELECTION_MENU_ITEM_ASSIST, 3983 textClassification.getLogType()); 3984 stopTextActionMode(); 3985 return true; 3986 } 3987 return mTextView.onTextContextMenuItem(item.getItemId()); 3988 } 3989 3990 @Override 3991 public void onDestroyActionMode(ActionMode mode) { 3992 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3993 getSelectionActionModeHelper().onDestroyActionMode(); 3994 mTextActionMode = null; 3995 Callback customCallback = getCustomCallback(); 3996 if (customCallback != null) { 3997 customCallback.onDestroyActionMode(mode); 3998 } 3999 4000 if (!mPreserveSelection) { 4001 /* 4002 * Leave current selection when we tentatively destroy action mode for the 4003 * selection. If we're detaching from a window, we'll bring back the selection 4004 * mode when (if) we get reattached. 4005 */ 4006 Selection.setSelection((Spannable) mTextView.getText(), 4007 mTextView.getSelectionEnd()); 4008 } 4009 4010 if (mSelectionModifierCursorController != null) { 4011 mSelectionModifierCursorController.hide(); 4012 } 4013 } 4014 4015 @Override 4016 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 4017 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 4018 super.onGetContentRect(mode, view, outRect); 4019 return; 4020 } 4021 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 4022 // We have a selection. 4023 mSelectionPath.reset(); 4024 mTextView.getLayout().getSelectionPath( 4025 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 4026 mSelectionPath.computeBounds(mSelectionBounds, true); 4027 mSelectionBounds.bottom += mHandleHeight; 4028 } else { 4029 // We have a cursor. 4030 Layout layout = mTextView.getLayout(); 4031 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 4032 float primaryHorizontal = clampHorizontalPosition(null, 4033 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 4034 mSelectionBounds.set( 4035 primaryHorizontal, 4036 layout.getLineTop(line), 4037 primaryHorizontal, 4038 layout.getLineBottom(line) - layout.getLineBottom(line) + mHandleHeight); 4039 } 4040 // Take TextView's padding and scroll into account. 4041 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4042 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4043 outRect.set( 4044 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4045 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4046 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4047 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4048 } 4049 } 4050 4051 /** 4052 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4053 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4054 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4055 */ 4056 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4057 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4058 final int[] mTmpIntOffset = new int[2]; 4059 final Matrix mViewToScreenMatrix = new Matrix(); 4060 4061 @Override 4062 public void updatePosition(int parentPositionX, int parentPositionY, 4063 boolean parentPositionChanged, boolean parentScrolled) { 4064 final InputMethodState ims = mInputMethodState; 4065 if (ims == null || ims.mBatchEditNesting > 0) { 4066 return; 4067 } 4068 final InputMethodManager imm = InputMethodManager.peekInstance(); 4069 if (null == imm) { 4070 return; 4071 } 4072 if (!imm.isActive(mTextView)) { 4073 return; 4074 } 4075 // Skip if the IME has not requested the cursor/anchor position. 4076 if (!imm.isCursorAnchorInfoEnabled()) { 4077 return; 4078 } 4079 Layout layout = mTextView.getLayout(); 4080 if (layout == null) { 4081 return; 4082 } 4083 4084 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4085 builder.reset(); 4086 4087 final int selectionStart = mTextView.getSelectionStart(); 4088 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4089 4090 // Construct transformation matrix from view local coordinates to screen coordinates. 4091 mViewToScreenMatrix.set(mTextView.getMatrix()); 4092 mTextView.getLocationOnScreen(mTmpIntOffset); 4093 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4094 builder.setMatrix(mViewToScreenMatrix); 4095 4096 final float viewportToContentHorizontalOffset = 4097 mTextView.viewportToContentHorizontalOffset(); 4098 final float viewportToContentVerticalOffset = 4099 mTextView.viewportToContentVerticalOffset(); 4100 4101 final CharSequence text = mTextView.getText(); 4102 if (text instanceof Spannable) { 4103 final Spannable sp = (Spannable) text; 4104 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4105 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4106 if (composingTextEnd < composingTextStart) { 4107 final int temp = composingTextEnd; 4108 composingTextEnd = composingTextStart; 4109 composingTextStart = temp; 4110 } 4111 final boolean hasComposingText = 4112 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4113 if (hasComposingText) { 4114 final CharSequence composingText = text.subSequence(composingTextStart, 4115 composingTextEnd); 4116 builder.setComposingText(composingTextStart, composingText); 4117 mTextView.populateCharacterBounds(builder, composingTextStart, 4118 composingTextEnd, viewportToContentHorizontalOffset, 4119 viewportToContentVerticalOffset); 4120 } 4121 } 4122 4123 // Treat selectionStart as the insertion point. 4124 if (0 <= selectionStart) { 4125 final int offset = selectionStart; 4126 final int line = layout.getLineForOffset(offset); 4127 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4128 + viewportToContentHorizontalOffset; 4129 final float insertionMarkerTop = layout.getLineTop(line) 4130 + viewportToContentVerticalOffset; 4131 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4132 + viewportToContentVerticalOffset; 4133 final float insertionMarkerBottom = layout.getLineBottomWithoutSpacing(line) 4134 + viewportToContentVerticalOffset; 4135 final boolean isTopVisible = mTextView 4136 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4137 final boolean isBottomVisible = mTextView 4138 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4139 int insertionMarkerFlags = 0; 4140 if (isTopVisible || isBottomVisible) { 4141 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4142 } 4143 if (!isTopVisible || !isBottomVisible) { 4144 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4145 } 4146 if (layout.isRtlCharAt(offset)) { 4147 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4148 } 4149 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4150 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4151 } 4152 4153 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4154 } 4155 } 4156 4157 @VisibleForTesting 4158 public abstract class HandleView extends View implements TextViewPositionListener { 4159 protected Drawable mDrawable; 4160 protected Drawable mDrawableLtr; 4161 protected Drawable mDrawableRtl; 4162 private final PopupWindow mContainer; 4163 // Position with respect to the parent TextView 4164 private int mPositionX, mPositionY; 4165 private boolean mIsDragging; 4166 // Offset from touch position to mPosition 4167 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4168 protected int mHotspotX; 4169 protected int mHorizontalGravity; 4170 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4171 private float mTouchOffsetY; 4172 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4173 private float mIdealVerticalOffset; 4174 // Parent's (TextView) previous position in window 4175 private int mLastParentX, mLastParentY; 4176 // Parent's (TextView) previous position on screen 4177 private int mLastParentXOnScreen, mLastParentYOnScreen; 4178 // Previous text character offset 4179 protected int mPreviousOffset = -1; 4180 // Previous text character offset 4181 private boolean mPositionHasChanged = true; 4182 // Minimum touch target size for handles 4183 private int mMinSize; 4184 // Indicates the line of text that the handle is on. 4185 protected int mPrevLine = UNSET_LINE; 4186 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4187 // when selecting text when the handles jump to the end / start of words which may be on 4188 // a different line. 4189 protected int mPreviousLineTouched = UNSET_LINE; 4190 4191 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4192 super(mTextView.getContext()); 4193 setId(id); 4194 mContainer = new PopupWindow(mTextView.getContext(), null, 4195 com.android.internal.R.attr.textSelectHandleWindowStyle); 4196 mContainer.setSplitTouchEnabled(true); 4197 mContainer.setClippingEnabled(false); 4198 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4199 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4200 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4201 mContainer.setContentView(this); 4202 4203 mDrawableLtr = drawableLtr; 4204 mDrawableRtl = drawableRtl; 4205 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4206 com.android.internal.R.dimen.text_handle_min_size); 4207 4208 updateDrawable(); 4209 4210 final int handleHeight = getPreferredHeight(); 4211 mTouchOffsetY = -0.3f * handleHeight; 4212 mIdealVerticalOffset = 0.7f * handleHeight; 4213 } 4214 4215 public float getIdealVerticalOffset() { 4216 return mIdealVerticalOffset; 4217 } 4218 4219 protected void updateDrawable() { 4220 if (mIsDragging) { 4221 // Don't update drawable during dragging. 4222 return; 4223 } 4224 final Layout layout = mTextView.getLayout(); 4225 if (layout == null) { 4226 return; 4227 } 4228 final int offset = getCurrentCursorOffset(); 4229 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4230 final Drawable oldDrawable = mDrawable; 4231 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4232 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4233 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4234 if (oldDrawable != mDrawable && isShowing()) { 4235 // Update popup window position. 4236 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4237 - getHorizontalOffset() + getCursorOffset(); 4238 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4239 mPositionHasChanged = true; 4240 updatePosition(mLastParentX, mLastParentY, false, false); 4241 postInvalidate(); 4242 } 4243 } 4244 4245 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4246 protected abstract int getHorizontalGravity(boolean isRtlRun); 4247 4248 // Touch-up filter: number of previous positions remembered 4249 private static final int HISTORY_SIZE = 5; 4250 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4251 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4252 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4253 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4254 private int mPreviousOffsetIndex = 0; 4255 private int mNumberPreviousOffsets = 0; 4256 4257 private void startTouchUpFilter(int offset) { 4258 mNumberPreviousOffsets = 0; 4259 addPositionToTouchUpFilter(offset); 4260 } 4261 4262 private void addPositionToTouchUpFilter(int offset) { 4263 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4264 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4265 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4266 mNumberPreviousOffsets++; 4267 } 4268 4269 private void filterOnTouchUp(boolean fromTouchScreen) { 4270 final long now = SystemClock.uptimeMillis(); 4271 int i = 0; 4272 int index = mPreviousOffsetIndex; 4273 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4274 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4275 i++; 4276 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4277 } 4278 4279 if (i > 0 && i < iMax 4280 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4281 positionAtCursorOffset(mPreviousOffsets[index], false, fromTouchScreen); 4282 } 4283 } 4284 4285 public boolean offsetHasBeenChanged() { 4286 return mNumberPreviousOffsets > 1; 4287 } 4288 4289 @Override 4290 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4291 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4292 } 4293 4294 @Override 4295 public void invalidate() { 4296 super.invalidate(); 4297 if (isShowing()) { 4298 positionAtCursorOffset(getCurrentCursorOffset(), true, false); 4299 } 4300 }; 4301 4302 private int getPreferredWidth() { 4303 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4304 } 4305 4306 private int getPreferredHeight() { 4307 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4308 } 4309 4310 public void show() { 4311 if (isShowing()) return; 4312 4313 getPositionListener().addSubscriber(this, true /* local position may change */); 4314 4315 // Make sure the offset is always considered new, even when focusing at same position 4316 mPreviousOffset = -1; 4317 positionAtCursorOffset(getCurrentCursorOffset(), false, false); 4318 } 4319 4320 protected void dismiss() { 4321 mIsDragging = false; 4322 mContainer.dismiss(); 4323 onDetached(); 4324 } 4325 4326 public void hide() { 4327 dismiss(); 4328 4329 getPositionListener().removeSubscriber(this); 4330 } 4331 4332 public boolean isShowing() { 4333 return mContainer.isShowing(); 4334 } 4335 4336 private boolean isVisible() { 4337 // Always show a dragging handle. 4338 if (mIsDragging) { 4339 return true; 4340 } 4341 4342 if (mTextView.isInBatchEditMode()) { 4343 return false; 4344 } 4345 4346 return mTextView.isPositionVisible( 4347 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4348 } 4349 4350 public abstract int getCurrentCursorOffset(); 4351 4352 protected abstract void updateSelection(int offset); 4353 4354 protected abstract void updatePosition(float x, float y, boolean fromTouchScreen); 4355 4356 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4357 return layout.isRtlCharAt(offset); 4358 } 4359 4360 @VisibleForTesting 4361 public float getHorizontal(@NonNull Layout layout, int offset) { 4362 return layout.getPrimaryHorizontal(offset); 4363 } 4364 4365 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4366 return mTextView.getOffsetAtCoordinate(line, x); 4367 } 4368 4369 /** 4370 * @param offset Cursor offset. Must be in [-1, length]. 4371 * @param forceUpdatePosition whether to force update the position. This should be true 4372 * when If the parent has been scrolled, for example. 4373 * @param fromTouchScreen {@code true} if the cursor is moved with motion events from the 4374 * touch screen. 4375 */ 4376 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4377 boolean fromTouchScreen) { 4378 // A HandleView relies on the layout, which may be nulled by external methods 4379 Layout layout = mTextView.getLayout(); 4380 if (layout == null) { 4381 // Will update controllers' state, hiding them and stopping selection mode if needed 4382 prepareCursorControllers(); 4383 return; 4384 } 4385 layout = mTextView.getLayout(); 4386 4387 boolean offsetChanged = offset != mPreviousOffset; 4388 if (offsetChanged || forceUpdatePosition) { 4389 if (offsetChanged) { 4390 updateSelection(offset); 4391 if (fromTouchScreen && mHapticTextHandleEnabled) { 4392 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 4393 } 4394 addPositionToTouchUpFilter(offset); 4395 } 4396 final int line = layout.getLineForOffset(offset); 4397 mPrevLine = line; 4398 4399 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4400 - getHorizontalOffset() + getCursorOffset(); 4401 mPositionY = layout.getLineBottomWithoutSpacing(line); 4402 4403 // Take TextView's padding and scroll into account. 4404 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4405 mPositionY += mTextView.viewportToContentVerticalOffset(); 4406 4407 mPreviousOffset = offset; 4408 mPositionHasChanged = true; 4409 } 4410 } 4411 4412 /** 4413 * Return the clamped horizontal position for the cursor. 4414 * 4415 * @param layout Text layout. 4416 * @param offset Character offset for the cursor. 4417 * @return The clamped horizontal position for the cursor. 4418 */ 4419 int getCursorHorizontalPosition(Layout layout, int offset) { 4420 return (int) (getHorizontal(layout, offset) - 0.5f); 4421 } 4422 4423 @Override 4424 public void updatePosition(int parentPositionX, int parentPositionY, 4425 boolean parentPositionChanged, boolean parentScrolled) { 4426 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled, false); 4427 if (parentPositionChanged || mPositionHasChanged) { 4428 if (mIsDragging) { 4429 // Update touchToWindow offset in case of parent scrolling while dragging 4430 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4431 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4432 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4433 mLastParentX = parentPositionX; 4434 mLastParentY = parentPositionY; 4435 } 4436 4437 onHandleMoved(); 4438 } 4439 4440 if (isVisible()) { 4441 // Transform to the window coordinates to follow the view tranformation. 4442 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4443 mTextView.transformFromViewToWindowSpace(pts); 4444 pts[0] -= mHotspotX + getHorizontalOffset(); 4445 4446 if (isShowing()) { 4447 mContainer.update(pts[0], pts[1], -1, -1); 4448 } else { 4449 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4450 } 4451 } else { 4452 if (isShowing()) { 4453 dismiss(); 4454 } 4455 } 4456 4457 mPositionHasChanged = false; 4458 } 4459 } 4460 4461 @Override 4462 protected void onDraw(Canvas c) { 4463 final int drawWidth = mDrawable.getIntrinsicWidth(); 4464 final int left = getHorizontalOffset(); 4465 4466 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4467 mDrawable.draw(c); 4468 } 4469 4470 private int getHorizontalOffset() { 4471 final int width = getPreferredWidth(); 4472 final int drawWidth = mDrawable.getIntrinsicWidth(); 4473 final int left; 4474 switch (mHorizontalGravity) { 4475 case Gravity.LEFT: 4476 left = 0; 4477 break; 4478 default: 4479 case Gravity.CENTER: 4480 left = (width - drawWidth) / 2; 4481 break; 4482 case Gravity.RIGHT: 4483 left = width - drawWidth; 4484 break; 4485 } 4486 return left; 4487 } 4488 4489 protected int getCursorOffset() { 4490 return 0; 4491 } 4492 4493 @Override 4494 public boolean onTouchEvent(MotionEvent ev) { 4495 updateFloatingToolbarVisibility(ev); 4496 4497 switch (ev.getActionMasked()) { 4498 case MotionEvent.ACTION_DOWN: { 4499 startTouchUpFilter(getCurrentCursorOffset()); 4500 4501 final PositionListener positionListener = getPositionListener(); 4502 mLastParentX = positionListener.getPositionX(); 4503 mLastParentY = positionListener.getPositionY(); 4504 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4505 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4506 4507 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4508 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4509 mTouchToWindowOffsetX = xInWindow - mPositionX; 4510 mTouchToWindowOffsetY = yInWindow - mPositionY; 4511 4512 mIsDragging = true; 4513 mPreviousLineTouched = UNSET_LINE; 4514 break; 4515 } 4516 4517 case MotionEvent.ACTION_MOVE: { 4518 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4519 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4520 4521 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4522 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4523 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4524 float newVerticalOffset; 4525 if (previousVerticalOffset < mIdealVerticalOffset) { 4526 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4527 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4528 } else { 4529 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4530 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4531 } 4532 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4533 4534 final float newPosX = 4535 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4536 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4537 4538 updatePosition(newPosX, newPosY, 4539 ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4540 break; 4541 } 4542 4543 case MotionEvent.ACTION_UP: 4544 filterOnTouchUp(ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4545 mIsDragging = false; 4546 updateDrawable(); 4547 break; 4548 4549 case MotionEvent.ACTION_CANCEL: 4550 mIsDragging = false; 4551 updateDrawable(); 4552 break; 4553 } 4554 return true; 4555 } 4556 4557 public boolean isDragging() { 4558 return mIsDragging; 4559 } 4560 4561 void onHandleMoved() {} 4562 4563 public void onDetached() {} 4564 } 4565 4566 private class InsertionHandleView extends HandleView { 4567 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4568 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4569 4570 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4571 private float mDownPositionX, mDownPositionY; 4572 private Runnable mHider; 4573 4574 public InsertionHandleView(Drawable drawable) { 4575 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4576 } 4577 4578 @Override 4579 public void show() { 4580 super.show(); 4581 4582 final long durationSinceCutOrCopy = 4583 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4584 4585 // Cancel the single tap delayed runnable. 4586 if (mInsertionActionModeRunnable != null 4587 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4588 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4589 || isCursorInsideEasyCorrectionSpan())) { 4590 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4591 } 4592 4593 // Prepare and schedule the single tap runnable to run exactly after the double tap 4594 // timeout has passed. 4595 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4596 && !isCursorInsideEasyCorrectionSpan() 4597 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4598 if (mTextActionMode == null) { 4599 if (mInsertionActionModeRunnable == null) { 4600 mInsertionActionModeRunnable = new Runnable() { 4601 @Override 4602 public void run() { 4603 startInsertionActionMode(); 4604 } 4605 }; 4606 } 4607 mTextView.postDelayed( 4608 mInsertionActionModeRunnable, 4609 ViewConfiguration.getDoubleTapTimeout() + 1); 4610 } 4611 4612 } 4613 4614 hideAfterDelay(); 4615 } 4616 4617 private void hideAfterDelay() { 4618 if (mHider == null) { 4619 mHider = new Runnable() { 4620 public void run() { 4621 hide(); 4622 } 4623 }; 4624 } else { 4625 removeHiderCallback(); 4626 } 4627 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4628 } 4629 4630 private void removeHiderCallback() { 4631 if (mHider != null) { 4632 mTextView.removeCallbacks(mHider); 4633 } 4634 } 4635 4636 @Override 4637 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4638 return drawable.getIntrinsicWidth() / 2; 4639 } 4640 4641 @Override 4642 protected int getHorizontalGravity(boolean isRtlRun) { 4643 return Gravity.CENTER_HORIZONTAL; 4644 } 4645 4646 @Override 4647 protected int getCursorOffset() { 4648 int offset = super.getCursorOffset(); 4649 if (mDrawableForCursor != null) { 4650 mDrawableForCursor.getPadding(mTempRect); 4651 offset += (mDrawableForCursor.getIntrinsicWidth() 4652 - mTempRect.left - mTempRect.right) / 2; 4653 } 4654 return offset; 4655 } 4656 4657 @Override 4658 int getCursorHorizontalPosition(Layout layout, int offset) { 4659 if (mDrawableForCursor != null) { 4660 final float horizontal = getHorizontal(layout, offset); 4661 return clampHorizontalPosition(mDrawableForCursor, horizontal) + mTempRect.left; 4662 } 4663 return super.getCursorHorizontalPosition(layout, offset); 4664 } 4665 4666 @Override 4667 public boolean onTouchEvent(MotionEvent ev) { 4668 final boolean result = super.onTouchEvent(ev); 4669 4670 switch (ev.getActionMasked()) { 4671 case MotionEvent.ACTION_DOWN: 4672 mDownPositionX = ev.getRawX(); 4673 mDownPositionY = ev.getRawY(); 4674 break; 4675 4676 case MotionEvent.ACTION_UP: 4677 if (!offsetHasBeenChanged()) { 4678 final float deltaX = mDownPositionX - ev.getRawX(); 4679 final float deltaY = mDownPositionY - ev.getRawY(); 4680 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4681 4682 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4683 mTextView.getContext()); 4684 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4685 4686 if (distanceSquared < touchSlop * touchSlop) { 4687 // Tapping on the handle toggles the insertion action mode. 4688 if (mTextActionMode != null) { 4689 stopTextActionMode(); 4690 } else { 4691 startInsertionActionMode(); 4692 } 4693 } 4694 } else { 4695 if (mTextActionMode != null) { 4696 mTextActionMode.invalidateContentRect(); 4697 } 4698 } 4699 hideAfterDelay(); 4700 break; 4701 4702 case MotionEvent.ACTION_CANCEL: 4703 hideAfterDelay(); 4704 break; 4705 4706 default: 4707 break; 4708 } 4709 4710 return result; 4711 } 4712 4713 @Override 4714 public int getCurrentCursorOffset() { 4715 return mTextView.getSelectionStart(); 4716 } 4717 4718 @Override 4719 public void updateSelection(int offset) { 4720 Selection.setSelection((Spannable) mTextView.getText(), offset); 4721 } 4722 4723 @Override 4724 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4725 Layout layout = mTextView.getLayout(); 4726 int offset; 4727 if (layout != null) { 4728 if (mPreviousLineTouched == UNSET_LINE) { 4729 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4730 } 4731 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4732 offset = getOffsetAtCoordinate(layout, currLine, x); 4733 mPreviousLineTouched = currLine; 4734 } else { 4735 offset = -1; 4736 } 4737 positionAtCursorOffset(offset, false, fromTouchScreen); 4738 if (mTextActionMode != null) { 4739 invalidateActionMode(); 4740 } 4741 } 4742 4743 @Override 4744 void onHandleMoved() { 4745 super.onHandleMoved(); 4746 removeHiderCallback(); 4747 } 4748 4749 @Override 4750 public void onDetached() { 4751 super.onDetached(); 4752 removeHiderCallback(); 4753 } 4754 } 4755 4756 @Retention(RetentionPolicy.SOURCE) 4757 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4758 public @interface HandleType {} 4759 public static final int HANDLE_TYPE_SELECTION_START = 0; 4760 public static final int HANDLE_TYPE_SELECTION_END = 1; 4761 4762 /** For selection handles */ 4763 @VisibleForTesting 4764 public final class SelectionHandleView extends HandleView { 4765 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4766 // end (HANDLE_TYPE_SELECTION_END). 4767 @HandleType 4768 private final int mHandleType; 4769 // Indicates whether the cursor is making adjustments within a word. 4770 private boolean mInWord = false; 4771 // Difference between touch position and word boundary position. 4772 private float mTouchWordDelta; 4773 // X value of the previous updatePosition call. 4774 private float mPrevX; 4775 // Indicates if the handle has moved a boundary between LTR and RTL text. 4776 private boolean mLanguageDirectionChanged = false; 4777 // Distance from edge of horizontally scrolling text view 4778 // to use to switch to character mode. 4779 private final float mTextViewEdgeSlop; 4780 // Used to save text view location. 4781 private final int[] mTextViewLocation = new int[2]; 4782 4783 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4784 @HandleType int handleType) { 4785 super(drawableLtr, drawableRtl, id); 4786 mHandleType = handleType; 4787 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4788 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4789 } 4790 4791 private boolean isStartHandle() { 4792 return mHandleType == HANDLE_TYPE_SELECTION_START; 4793 } 4794 4795 @Override 4796 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4797 if (isRtlRun == isStartHandle()) { 4798 return drawable.getIntrinsicWidth() / 4; 4799 } else { 4800 return (drawable.getIntrinsicWidth() * 3) / 4; 4801 } 4802 } 4803 4804 @Override 4805 protected int getHorizontalGravity(boolean isRtlRun) { 4806 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4807 } 4808 4809 @Override 4810 public int getCurrentCursorOffset() { 4811 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4812 } 4813 4814 @Override 4815 protected void updateSelection(int offset) { 4816 if (isStartHandle()) { 4817 Selection.setSelection((Spannable) mTextView.getText(), offset, 4818 mTextView.getSelectionEnd()); 4819 } else { 4820 Selection.setSelection((Spannable) mTextView.getText(), 4821 mTextView.getSelectionStart(), offset); 4822 } 4823 updateDrawable(); 4824 if (mTextActionMode != null) { 4825 invalidateActionMode(); 4826 } 4827 } 4828 4829 @Override 4830 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4831 final Layout layout = mTextView.getLayout(); 4832 if (layout == null) { 4833 // HandleView will deal appropriately in positionAtCursorOffset when 4834 // layout is null. 4835 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y), 4836 fromTouchScreen); 4837 return; 4838 } 4839 4840 if (mPreviousLineTouched == UNSET_LINE) { 4841 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4842 } 4843 4844 boolean positionCursor = false; 4845 final int anotherHandleOffset = 4846 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4847 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4848 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4849 4850 if (isStartHandle() && initialOffset >= anotherHandleOffset 4851 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4852 // Handles have crossed, bound it to the first selected line and 4853 // adjust by word / char as normal. 4854 currLine = layout.getLineForOffset(anotherHandleOffset); 4855 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4856 } 4857 4858 int offset = initialOffset; 4859 final int wordEnd = getWordEnd(offset); 4860 final int wordStart = getWordStart(offset); 4861 4862 if (mPrevX == UNSET_X_VALUE) { 4863 mPrevX = x; 4864 } 4865 4866 final int currentOffset = getCurrentCursorOffset(); 4867 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4868 final boolean atRtl = isAtRtlRun(layout, offset); 4869 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4870 4871 // We can't determine if the user is expanding or shrinking the selection if they're 4872 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4873 // the cursor at the current position. 4874 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4875 // We're on a boundary or this is the first direction change -- just update 4876 // to the current position. 4877 mLanguageDirectionChanged = true; 4878 mTouchWordDelta = 0.0f; 4879 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4880 return; 4881 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4882 // We've just moved past the boundary so update the position. After this we can 4883 // figure out if the user is expanding or shrinking to go by word or character. 4884 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4885 mTouchWordDelta = 0.0f; 4886 mLanguageDirectionChanged = false; 4887 return; 4888 } 4889 4890 boolean isExpanding; 4891 final float xDiff = x - mPrevX; 4892 if (isStartHandle()) { 4893 isExpanding = currLine < mPreviousLineTouched; 4894 } else { 4895 isExpanding = currLine > mPreviousLineTouched; 4896 } 4897 if (atRtl == isStartHandle()) { 4898 isExpanding |= xDiff > 0; 4899 } else { 4900 isExpanding |= xDiff < 0; 4901 } 4902 4903 if (mTextView.getHorizontallyScrolling()) { 4904 if (positionNearEdgeOfScrollingView(x, atRtl) 4905 && ((isStartHandle() && mTextView.getScrollX() != 0) 4906 || (!isStartHandle() 4907 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4908 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4909 || (!isStartHandle() && offset > currentOffset))) 4910 || !isExpanding)) { 4911 // If we're expanding ensure that the offset is actually expanding compared to 4912 // the current offset, if the handle snapped to the word, the finger position 4913 // may be out of sync and we don't want the selection to jump back. 4914 mTouchWordDelta = 0.0f; 4915 final int nextOffset = (atRtl == isStartHandle()) 4916 ? layout.getOffsetToRightOf(mPreviousOffset) 4917 : layout.getOffsetToLeftOf(mPreviousOffset); 4918 positionAndAdjustForCrossingHandles(nextOffset, fromTouchScreen); 4919 return; 4920 } 4921 } 4922 4923 if (isExpanding) { 4924 // User is increasing the selection. 4925 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4926 final boolean snapToWord = (!mInWord 4927 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4928 && atRtl == isAtRtlRun(layout, wordBoundary); 4929 if (snapToWord) { 4930 // Sometimes words can be broken across lines (Chinese, hyphenation). 4931 // We still snap to the word boundary but we only use the letters on the 4932 // current line to determine if the user is far enough into the word to snap. 4933 if (layout.getLineForOffset(wordBoundary) != currLine) { 4934 wordBoundary = isStartHandle() 4935 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4936 } 4937 final int offsetThresholdToSnap = isStartHandle() 4938 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4939 : wordStart + ((wordBoundary - wordStart) / 2); 4940 if (isStartHandle() 4941 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4942 // User is far enough into the word or on a different line so we expand by 4943 // word. 4944 offset = wordStart; 4945 } else if (!isStartHandle() 4946 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4947 // User is far enough into the word or on a different line so we expand by 4948 // word. 4949 offset = wordEnd; 4950 } else { 4951 offset = mPreviousOffset; 4952 } 4953 } 4954 if ((isStartHandle() && offset < initialOffset) 4955 || (!isStartHandle() && offset > initialOffset)) { 4956 final float adjustedX = getHorizontal(layout, offset); 4957 mTouchWordDelta = 4958 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4959 } else { 4960 mTouchWordDelta = 0.0f; 4961 } 4962 positionCursor = true; 4963 } else { 4964 final int adjustedOffset = 4965 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4966 final boolean shrinking = isStartHandle() 4967 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4968 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4969 if (shrinking) { 4970 // User is shrinking the selection. 4971 if (currLine != mPrevLine) { 4972 // We're on a different line, so we'll snap to word boundaries. 4973 offset = isStartHandle() ? wordStart : wordEnd; 4974 if ((isStartHandle() && offset < initialOffset) 4975 || (!isStartHandle() && offset > initialOffset)) { 4976 final float adjustedX = getHorizontal(layout, offset); 4977 mTouchWordDelta = 4978 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4979 } else { 4980 mTouchWordDelta = 0.0f; 4981 } 4982 } else { 4983 offset = adjustedOffset; 4984 } 4985 positionCursor = true; 4986 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4987 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4988 // Handle has jumped to the word boundary, and the user is moving 4989 // their finger towards the handle, the delta should be updated. 4990 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4991 - getHorizontal(layout, mPreviousOffset); 4992 } 4993 } 4994 4995 if (positionCursor) { 4996 mPreviousLineTouched = currLine; 4997 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4998 } 4999 mPrevX = x; 5000 } 5001 5002 @Override 5003 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 5004 boolean fromTouchScreen) { 5005 super.positionAtCursorOffset(offset, forceUpdatePosition, fromTouchScreen); 5006 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 5007 } 5008 5009 @Override 5010 public boolean onTouchEvent(MotionEvent event) { 5011 boolean superResult = super.onTouchEvent(event); 5012 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 5013 // Reset the touch word offset and x value when the user 5014 // re-engages the handle. 5015 mTouchWordDelta = 0.0f; 5016 mPrevX = UNSET_X_VALUE; 5017 } 5018 return superResult; 5019 } 5020 5021 private void positionAndAdjustForCrossingHandles(int offset, boolean fromTouchScreen) { 5022 final int anotherHandleOffset = 5023 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5024 if ((isStartHandle() && offset >= anotherHandleOffset) 5025 || (!isStartHandle() && offset <= anotherHandleOffset)) { 5026 mTouchWordDelta = 0.0f; 5027 final Layout layout = mTextView.getLayout(); 5028 if (layout != null && offset != anotherHandleOffset) { 5029 final float horiz = getHorizontal(layout, offset); 5030 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 5031 !isStartHandle()); 5032 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 5033 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 5034 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 5035 // This handle passes another one as it crossed a direction boundary. 5036 // Don't minimize the selection, but keep the handle at the run boundary. 5037 final int currentOffset = getCurrentCursorOffset(); 5038 final int offsetToGetRunRange = isStartHandle() 5039 ? currentOffset : Math.max(currentOffset - 1, 0); 5040 final long range = layout.getRunRange(offsetToGetRunRange); 5041 if (isStartHandle()) { 5042 offset = TextUtils.unpackRangeStartFromLong(range); 5043 } else { 5044 offset = TextUtils.unpackRangeEndFromLong(range); 5045 } 5046 positionAtCursorOffset(offset, false, fromTouchScreen); 5047 return; 5048 } 5049 } 5050 // Handles can not cross and selection is at least one character. 5051 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5052 } 5053 positionAtCursorOffset(offset, false, fromTouchScreen); 5054 } 5055 5056 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5057 mTextView.getLocationOnScreen(mTextViewLocation); 5058 boolean nearEdge; 5059 if (atRtl == isStartHandle()) { 5060 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5061 - mTextView.getPaddingRight(); 5062 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5063 } else { 5064 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5065 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5066 } 5067 return nearEdge; 5068 } 5069 5070 @Override 5071 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5072 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5073 return layout.isRtlCharAt(offsetToCheck); 5074 } 5075 5076 @Override 5077 public float getHorizontal(@NonNull Layout layout, int offset) { 5078 return getHorizontal(layout, offset, isStartHandle()); 5079 } 5080 5081 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5082 final int line = layout.getLineForOffset(offset); 5083 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5084 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5085 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5086 return (isRtlChar == isRtlParagraph) 5087 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5088 } 5089 5090 @Override 5091 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5092 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5093 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5094 if (!layout.isLevelBoundary(primaryOffset)) { 5095 return primaryOffset; 5096 } 5097 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5098 final int currentOffset = getCurrentCursorOffset(); 5099 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5100 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5101 if (primaryDiff < secondaryDiff) { 5102 return primaryOffset; 5103 } else if (primaryDiff > secondaryDiff) { 5104 return secondaryOffset; 5105 } else { 5106 final int offsetToCheck = isStartHandle() 5107 ? currentOffset : Math.max(currentOffset - 1, 0); 5108 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5109 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5110 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5111 } 5112 } 5113 } 5114 5115 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5116 final int trueLine = mTextView.getLineAtCoordinate(y); 5117 if (layout == null || prevLine > layout.getLineCount() 5118 || layout.getLineCount() <= 0 || prevLine < 0) { 5119 // Invalid parameters, just return whatever line is at y. 5120 return trueLine; 5121 } 5122 5123 if (Math.abs(trueLine - prevLine) >= 2) { 5124 // Only stick to lines if we're within a line of the previous selection. 5125 return trueLine; 5126 } 5127 5128 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5129 final int lineCount = layout.getLineCount(); 5130 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5131 5132 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5133 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5134 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5135 5136 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5137 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5138 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5139 5140 // Determine if we've moved lines based on y position and previous line. 5141 int currLine; 5142 if (y <= yTopBound) { 5143 currLine = Math.max(prevLine - 1, 0); 5144 } else if (y >= yBottomBound) { 5145 currLine = Math.min(prevLine + 1, lineCount - 1); 5146 } else { 5147 currLine = prevLine; 5148 } 5149 return currLine; 5150 } 5151 5152 /** 5153 * A CursorController instance can be used to control a cursor in the text. 5154 */ 5155 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5156 /** 5157 * Makes the cursor controller visible on screen. 5158 * See also {@link #hide()}. 5159 */ 5160 public void show(); 5161 5162 /** 5163 * Hide the cursor controller from screen. 5164 * See also {@link #show()}. 5165 */ 5166 public void hide(); 5167 5168 /** 5169 * Called when the view is detached from window. Perform house keeping task, such as 5170 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5171 * preventing the activity from being recycled. 5172 */ 5173 public void onDetached(); 5174 5175 public boolean isCursorBeingModified(); 5176 5177 public boolean isActive(); 5178 } 5179 5180 private class InsertionPointCursorController implements CursorController { 5181 private InsertionHandleView mHandle; 5182 5183 public void show() { 5184 getHandle().show(); 5185 5186 if (mSelectionModifierCursorController != null) { 5187 mSelectionModifierCursorController.hide(); 5188 } 5189 } 5190 5191 public void hide() { 5192 if (mHandle != null) { 5193 mHandle.hide(); 5194 } 5195 } 5196 5197 public void onTouchModeChanged(boolean isInTouchMode) { 5198 if (!isInTouchMode) { 5199 hide(); 5200 } 5201 } 5202 5203 private InsertionHandleView getHandle() { 5204 if (mSelectHandleCenter == null) { 5205 mSelectHandleCenter = mTextView.getContext().getDrawable( 5206 mTextView.mTextSelectHandleRes); 5207 } 5208 if (mHandle == null) { 5209 mHandle = new InsertionHandleView(mSelectHandleCenter); 5210 } 5211 return mHandle; 5212 } 5213 5214 @Override 5215 public void onDetached() { 5216 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5217 observer.removeOnTouchModeChangeListener(this); 5218 5219 if (mHandle != null) mHandle.onDetached(); 5220 } 5221 5222 @Override 5223 public boolean isCursorBeingModified() { 5224 return mHandle != null && mHandle.isDragging(); 5225 } 5226 5227 @Override 5228 public boolean isActive() { 5229 return mHandle != null && mHandle.isShowing(); 5230 } 5231 5232 public void invalidateHandle() { 5233 if (mHandle != null) { 5234 mHandle.invalidate(); 5235 } 5236 } 5237 } 5238 5239 class SelectionModifierCursorController implements CursorController { 5240 // The cursor controller handles, lazily created when shown. 5241 private SelectionHandleView mStartHandle; 5242 private SelectionHandleView mEndHandle; 5243 // The offsets of that last touch down event. Remembered to start selection there. 5244 private int mMinTouchOffset, mMaxTouchOffset; 5245 5246 private float mDownPositionX, mDownPositionY; 5247 private boolean mGestureStayedInTapRegion; 5248 5249 // Where the user first starts the drag motion. 5250 private int mStartOffset = -1; 5251 5252 private boolean mHaventMovedEnoughToStartDrag; 5253 // The line that a selection happened most recently with the drag accelerator. 5254 private int mLineSelectionIsOn = -1; 5255 // Whether the drag accelerator has selected past the initial line. 5256 private boolean mSwitchedLines = false; 5257 5258 // Indicates the drag accelerator mode that the user is currently using. 5259 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5260 // Drag accelerator is inactive. 5261 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5262 // Character based selection by dragging. Only for mouse. 5263 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5264 // Word based selection by dragging. Enabled after long pressing or double tapping. 5265 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5266 // Paragraph based selection by dragging. Enabled after mouse triple click. 5267 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5268 5269 SelectionModifierCursorController() { 5270 resetTouchOffsets(); 5271 } 5272 5273 public void show() { 5274 if (mTextView.isInBatchEditMode()) { 5275 return; 5276 } 5277 initDrawables(); 5278 initHandles(); 5279 } 5280 5281 private void initDrawables() { 5282 if (mSelectHandleLeft == null) { 5283 mSelectHandleLeft = mTextView.getContext().getDrawable( 5284 mTextView.mTextSelectHandleLeftRes); 5285 } 5286 if (mSelectHandleRight == null) { 5287 mSelectHandleRight = mTextView.getContext().getDrawable( 5288 mTextView.mTextSelectHandleRightRes); 5289 } 5290 } 5291 5292 private void initHandles() { 5293 // Lazy object creation has to be done before updatePosition() is called. 5294 if (mStartHandle == null) { 5295 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5296 com.android.internal.R.id.selection_start_handle, 5297 HANDLE_TYPE_SELECTION_START); 5298 } 5299 if (mEndHandle == null) { 5300 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5301 com.android.internal.R.id.selection_end_handle, 5302 HANDLE_TYPE_SELECTION_END); 5303 } 5304 5305 mStartHandle.show(); 5306 mEndHandle.show(); 5307 5308 hideInsertionPointCursorController(); 5309 } 5310 5311 public void hide() { 5312 if (mStartHandle != null) mStartHandle.hide(); 5313 if (mEndHandle != null) mEndHandle.hide(); 5314 } 5315 5316 public void enterDrag(int dragAcceleratorMode) { 5317 // Just need to init the handles / hide insertion cursor. 5318 show(); 5319 mDragAcceleratorMode = dragAcceleratorMode; 5320 // Start location of selection. 5321 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5322 mLastDownPositionY); 5323 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5324 // Don't show the handles until user has lifted finger. 5325 hide(); 5326 5327 // This stops scrolling parents from intercepting the touch event, allowing 5328 // the user to continue dragging across the screen to select text; TextView will 5329 // scroll as necessary. 5330 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5331 mTextView.cancelLongPress(); 5332 } 5333 5334 public void onTouchEvent(MotionEvent event) { 5335 // This is done even when the View does not have focus, so that long presses can start 5336 // selection and tap can move cursor from this tap position. 5337 final float eventX = event.getX(); 5338 final float eventY = event.getY(); 5339 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5340 switch (event.getActionMasked()) { 5341 case MotionEvent.ACTION_DOWN: 5342 if (extractedTextModeWillBeStarted()) { 5343 // Prevent duplicating the selection handles until the mode starts. 5344 hide(); 5345 } else { 5346 // Remember finger down position, to be able to start selection from there. 5347 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5348 eventX, eventY); 5349 5350 // Double tap detection 5351 if (mGestureStayedInTapRegion) { 5352 if (mTapState == TAP_STATE_DOUBLE_TAP 5353 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5354 final float deltaX = eventX - mDownPositionX; 5355 final float deltaY = eventY - mDownPositionY; 5356 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5357 5358 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5359 mTextView.getContext()); 5360 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5361 boolean stayedInArea = 5362 distanceSquared < doubleTapSlop * doubleTapSlop; 5363 5364 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5365 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5366 selectCurrentWordAndStartDrag(); 5367 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5368 selectCurrentParagraphAndStartDrag(); 5369 } 5370 mDiscardNextActionUp = true; 5371 } 5372 } 5373 } 5374 5375 mDownPositionX = eventX; 5376 mDownPositionY = eventY; 5377 mGestureStayedInTapRegion = true; 5378 mHaventMovedEnoughToStartDrag = true; 5379 } 5380 break; 5381 5382 case MotionEvent.ACTION_POINTER_DOWN: 5383 case MotionEvent.ACTION_POINTER_UP: 5384 // Handle multi-point gestures. Keep min and max offset positions. 5385 // Only activated for devices that correctly handle multi-touch. 5386 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5387 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5388 updateMinAndMaxOffsets(event); 5389 } 5390 break; 5391 5392 case MotionEvent.ACTION_MOVE: 5393 final ViewConfiguration viewConfig = ViewConfiguration.get( 5394 mTextView.getContext()); 5395 final int touchSlop = viewConfig.getScaledTouchSlop(); 5396 5397 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5398 final float deltaX = eventX - mDownPositionX; 5399 final float deltaY = eventY - mDownPositionY; 5400 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5401 5402 if (mGestureStayedInTapRegion) { 5403 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5404 mGestureStayedInTapRegion = 5405 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5406 } 5407 if (mHaventMovedEnoughToStartDrag) { 5408 // We don't start dragging until the user has moved enough. 5409 mHaventMovedEnoughToStartDrag = 5410 distanceSquared <= touchSlop * touchSlop; 5411 } 5412 } 5413 5414 if (isMouse && !isDragAcceleratorActive()) { 5415 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5416 if (mTextView.hasSelection() 5417 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5418 && offset >= mTextView.getSelectionStart() 5419 && offset <= mTextView.getSelectionEnd()) { 5420 startDragAndDrop(); 5421 break; 5422 } 5423 5424 if (mStartOffset != offset) { 5425 // Start character based drag accelerator. 5426 stopTextActionMode(); 5427 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5428 mDiscardNextActionUp = true; 5429 mHaventMovedEnoughToStartDrag = false; 5430 } 5431 } 5432 5433 if (mStartHandle != null && mStartHandle.isShowing()) { 5434 // Don't do the drag if the handles are showing already. 5435 break; 5436 } 5437 5438 updateSelection(event); 5439 break; 5440 5441 case MotionEvent.ACTION_UP: 5442 if (!isDragAcceleratorActive()) { 5443 break; 5444 } 5445 updateSelection(event); 5446 5447 // No longer dragging to select text, let the parent intercept events. 5448 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5449 5450 // No longer the first dragging motion, reset. 5451 resetDragAcceleratorState(); 5452 5453 if (mTextView.hasSelection()) { 5454 // Drag selection should not be adjusted by the text classifier. 5455 startSelectionActionModeAsync(mHaventMovedEnoughToStartDrag); 5456 } 5457 break; 5458 } 5459 } 5460 5461 private void updateSelection(MotionEvent event) { 5462 if (mTextView.getLayout() != null) { 5463 switch (mDragAcceleratorMode) { 5464 case DRAG_ACCELERATOR_MODE_CHARACTER: 5465 updateCharacterBasedSelection(event); 5466 break; 5467 case DRAG_ACCELERATOR_MODE_WORD: 5468 updateWordBasedSelection(event); 5469 break; 5470 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5471 updateParagraphBasedSelection(event); 5472 break; 5473 } 5474 } 5475 } 5476 5477 /** 5478 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5479 * 5480 * @return true if the drag was started. 5481 */ 5482 private boolean selectCurrentParagraphAndStartDrag() { 5483 if (mInsertionActionModeRunnable != null) { 5484 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5485 } 5486 stopTextActionMode(); 5487 if (!selectCurrentParagraph()) { 5488 return false; 5489 } 5490 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5491 return true; 5492 } 5493 5494 private void updateCharacterBasedSelection(MotionEvent event) { 5495 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5496 updateSelectionInternal(mStartOffset, offset, 5497 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5498 } 5499 5500 private void updateWordBasedSelection(MotionEvent event) { 5501 if (mHaventMovedEnoughToStartDrag) { 5502 return; 5503 } 5504 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5505 final ViewConfiguration viewConfig = ViewConfiguration.get( 5506 mTextView.getContext()); 5507 final float eventX = event.getX(); 5508 final float eventY = event.getY(); 5509 final int currLine; 5510 if (isMouse) { 5511 // No need to offset the y coordinate for mouse input. 5512 currLine = mTextView.getLineAtCoordinate(eventY); 5513 } else { 5514 float y = eventY; 5515 if (mSwitchedLines) { 5516 // Offset the finger by the same vertical offset as the handles. 5517 // This improves visibility of the content being selected by 5518 // shifting the finger below the content, this is applied once 5519 // the user has switched lines. 5520 final int touchSlop = viewConfig.getScaledTouchSlop(); 5521 final float fingerOffset = (mStartHandle != null) 5522 ? mStartHandle.getIdealVerticalOffset() 5523 : touchSlop; 5524 y = eventY - fingerOffset; 5525 } 5526 5527 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5528 y); 5529 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5530 // Break early here, we want to offset the finger position from 5531 // the selection highlight, once the user moved their finger 5532 // to a different line we should apply the offset and *not* switch 5533 // lines until recomputing the position with the finger offset. 5534 mSwitchedLines = true; 5535 return; 5536 } 5537 } 5538 5539 int startOffset; 5540 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5541 // Snap to word boundaries. 5542 if (mStartOffset < offset) { 5543 // Expanding with end handle. 5544 offset = getWordEnd(offset); 5545 startOffset = getWordStart(mStartOffset); 5546 } else { 5547 // Expanding with start handle. 5548 offset = getWordStart(offset); 5549 startOffset = getWordEnd(mStartOffset); 5550 if (startOffset == offset) { 5551 offset = getNextCursorOffset(offset, false); 5552 } 5553 } 5554 mLineSelectionIsOn = currLine; 5555 updateSelectionInternal(startOffset, offset, 5556 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5557 } 5558 5559 private void updateParagraphBasedSelection(MotionEvent event) { 5560 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5561 5562 final int start = Math.min(offset, mStartOffset); 5563 final int end = Math.max(offset, mStartOffset); 5564 final long paragraphsRange = getParagraphsRange(start, end); 5565 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5566 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5567 updateSelectionInternal(selectionStart, selectionEnd, 5568 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5569 } 5570 5571 private void updateSelectionInternal(int selectionStart, int selectionEnd, 5572 boolean fromTouchScreen) { 5573 final boolean performHapticFeedback = fromTouchScreen && mHapticTextHandleEnabled 5574 && ((mTextView.getSelectionStart() != selectionStart) 5575 || (mTextView.getSelectionEnd() != selectionEnd)); 5576 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5577 if (performHapticFeedback) { 5578 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 5579 } 5580 } 5581 5582 /** 5583 * @param event 5584 */ 5585 private void updateMinAndMaxOffsets(MotionEvent event) { 5586 int pointerCount = event.getPointerCount(); 5587 for (int index = 0; index < pointerCount; index++) { 5588 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5589 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5590 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5591 } 5592 } 5593 5594 public int getMinTouchOffset() { 5595 return mMinTouchOffset; 5596 } 5597 5598 public int getMaxTouchOffset() { 5599 return mMaxTouchOffset; 5600 } 5601 5602 public void resetTouchOffsets() { 5603 mMinTouchOffset = mMaxTouchOffset = -1; 5604 resetDragAcceleratorState(); 5605 } 5606 5607 private void resetDragAcceleratorState() { 5608 mStartOffset = -1; 5609 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5610 mSwitchedLines = false; 5611 final int selectionStart = mTextView.getSelectionStart(); 5612 final int selectionEnd = mTextView.getSelectionEnd(); 5613 if (selectionStart > selectionEnd) { 5614 Selection.setSelection((Spannable) mTextView.getText(), 5615 selectionEnd, selectionStart); 5616 } 5617 } 5618 5619 /** 5620 * @return true iff this controller is currently used to move the selection start. 5621 */ 5622 public boolean isSelectionStartDragged() { 5623 return mStartHandle != null && mStartHandle.isDragging(); 5624 } 5625 5626 @Override 5627 public boolean isCursorBeingModified() { 5628 return isDragAcceleratorActive() || isSelectionStartDragged() 5629 || (mEndHandle != null && mEndHandle.isDragging()); 5630 } 5631 5632 /** 5633 * @return true if the user is selecting text using the drag accelerator. 5634 */ 5635 public boolean isDragAcceleratorActive() { 5636 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5637 } 5638 5639 public void onTouchModeChanged(boolean isInTouchMode) { 5640 if (!isInTouchMode) { 5641 hide(); 5642 } 5643 } 5644 5645 @Override 5646 public void onDetached() { 5647 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5648 observer.removeOnTouchModeChangeListener(this); 5649 5650 if (mStartHandle != null) mStartHandle.onDetached(); 5651 if (mEndHandle != null) mEndHandle.onDetached(); 5652 } 5653 5654 @Override 5655 public boolean isActive() { 5656 return mStartHandle != null && mStartHandle.isShowing(); 5657 } 5658 5659 public void invalidateHandles() { 5660 if (mStartHandle != null) { 5661 mStartHandle.invalidate(); 5662 } 5663 if (mEndHandle != null) { 5664 mEndHandle.invalidate(); 5665 } 5666 } 5667 } 5668 5669 private class CorrectionHighlighter { 5670 private final Path mPath = new Path(); 5671 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5672 private int mStart, mEnd; 5673 private long mFadingStartTime; 5674 private RectF mTempRectF; 5675 private static final int FADE_OUT_DURATION = 400; 5676 5677 public CorrectionHighlighter() { 5678 mPaint.setCompatibilityScaling( 5679 mTextView.getResources().getCompatibilityInfo().applicationScale); 5680 mPaint.setStyle(Paint.Style.FILL); 5681 } 5682 5683 public void highlight(CorrectionInfo info) { 5684 mStart = info.getOffset(); 5685 mEnd = mStart + info.getNewText().length(); 5686 mFadingStartTime = SystemClock.uptimeMillis(); 5687 5688 if (mStart < 0 || mEnd < 0) { 5689 stopAnimation(); 5690 } 5691 } 5692 5693 public void draw(Canvas canvas, int cursorOffsetVertical) { 5694 if (updatePath() && updatePaint()) { 5695 if (cursorOffsetVertical != 0) { 5696 canvas.translate(0, cursorOffsetVertical); 5697 } 5698 5699 canvas.drawPath(mPath, mPaint); 5700 5701 if (cursorOffsetVertical != 0) { 5702 canvas.translate(0, -cursorOffsetVertical); 5703 } 5704 invalidate(true); // TODO invalidate cursor region only 5705 } else { 5706 stopAnimation(); 5707 invalidate(false); // TODO invalidate cursor region only 5708 } 5709 } 5710 5711 private boolean updatePaint() { 5712 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5713 if (duration > FADE_OUT_DURATION) return false; 5714 5715 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5716 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5717 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5718 + ((int) (highlightColorAlpha * coef) << 24); 5719 mPaint.setColor(color); 5720 return true; 5721 } 5722 5723 private boolean updatePath() { 5724 final Layout layout = mTextView.getLayout(); 5725 if (layout == null) return false; 5726 5727 // Update in case text is edited while the animation is run 5728 final int length = mTextView.getText().length(); 5729 int start = Math.min(length, mStart); 5730 int end = Math.min(length, mEnd); 5731 5732 mPath.reset(); 5733 layout.getSelectionPath(start, end, mPath); 5734 return true; 5735 } 5736 5737 private void invalidate(boolean delayed) { 5738 if (mTextView.getLayout() == null) return; 5739 5740 if (mTempRectF == null) mTempRectF = new RectF(); 5741 mPath.computeBounds(mTempRectF, false); 5742 5743 int left = mTextView.getCompoundPaddingLeft(); 5744 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5745 5746 if (delayed) { 5747 mTextView.postInvalidateOnAnimation( 5748 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5749 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5750 } else { 5751 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5752 (int) mTempRectF.right, (int) mTempRectF.bottom); 5753 } 5754 } 5755 5756 private void stopAnimation() { 5757 Editor.this.mCorrectionHighlighter = null; 5758 } 5759 } 5760 5761 private static class ErrorPopup extends PopupWindow { 5762 private boolean mAbove = false; 5763 private final TextView mView; 5764 private int mPopupInlineErrorBackgroundId = 0; 5765 private int mPopupInlineErrorAboveBackgroundId = 0; 5766 5767 ErrorPopup(TextView v, int width, int height) { 5768 super(v, width, height); 5769 mView = v; 5770 // Make sure the TextView has a background set as it will be used the first time it is 5771 // shown and positioned. Initialized with below background, which should have 5772 // dimensions identical to the above version for this to work (and is more likely). 5773 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5774 com.android.internal.R.styleable.Theme_errorMessageBackground); 5775 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5776 } 5777 5778 void fixDirection(boolean above) { 5779 mAbove = above; 5780 5781 if (above) { 5782 mPopupInlineErrorAboveBackgroundId = 5783 getResourceId(mPopupInlineErrorAboveBackgroundId, 5784 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5785 } else { 5786 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5787 com.android.internal.R.styleable.Theme_errorMessageBackground); 5788 } 5789 5790 mView.setBackgroundResource( 5791 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5792 } 5793 5794 private int getResourceId(int currentId, int index) { 5795 if (currentId == 0) { 5796 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5797 R.styleable.Theme); 5798 currentId = styledAttributes.getResourceId(index, 0); 5799 styledAttributes.recycle(); 5800 } 5801 return currentId; 5802 } 5803 5804 @Override 5805 public void update(int x, int y, int w, int h, boolean force) { 5806 super.update(x, y, w, h, force); 5807 5808 boolean above = isAboveAnchor(); 5809 if (above != mAbove) { 5810 fixDirection(above); 5811 } 5812 } 5813 } 5814 5815 static class InputContentType { 5816 int imeOptions = EditorInfo.IME_NULL; 5817 String privateImeOptions; 5818 CharSequence imeActionLabel; 5819 int imeActionId; 5820 Bundle extras; 5821 OnEditorActionListener onEditorActionListener; 5822 boolean enterDown; 5823 LocaleList imeHintLocales; 5824 } 5825 5826 static class InputMethodState { 5827 ExtractedTextRequest mExtractedTextRequest; 5828 final ExtractedText mExtractedText = new ExtractedText(); 5829 int mBatchEditNesting; 5830 boolean mCursorChanged; 5831 boolean mSelectionModeChanged; 5832 boolean mContentChanged; 5833 int mChangedStart, mChangedEnd, mChangedDelta; 5834 } 5835 5836 /** 5837 * @return True iff (start, end) is a valid range within the text. 5838 */ 5839 private static boolean isValidRange(CharSequence text, int start, int end) { 5840 return 0 <= start && start <= end && end <= text.length(); 5841 } 5842 5843 @VisibleForTesting 5844 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5845 return mSuggestionsPopupWindow; 5846 } 5847 5848 /** 5849 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5850 * text being typed (and hence always returns null from the filter() method). 5851 * 5852 * TODO: Make this span aware. 5853 */ 5854 public static class UndoInputFilter implements InputFilter { 5855 private final Editor mEditor; 5856 5857 // Whether the current filter pass is directly caused by an end-user text edit. 5858 private boolean mIsUserEdit; 5859 5860 // Whether the text field is handling an IME composition. Must be parceled in case the user 5861 // rotates the screen during composition. 5862 private boolean mHasComposition; 5863 5864 // Whether the user is expanding or shortening the text 5865 private boolean mExpanding; 5866 5867 // Whether the previous edit operation was in the current batch edit. 5868 private boolean mPreviousOperationWasInSameBatchEdit; 5869 5870 public UndoInputFilter(Editor editor) { 5871 mEditor = editor; 5872 } 5873 5874 public void saveInstanceState(Parcel parcel) { 5875 parcel.writeInt(mIsUserEdit ? 1 : 0); 5876 parcel.writeInt(mHasComposition ? 1 : 0); 5877 parcel.writeInt(mExpanding ? 1 : 0); 5878 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5879 } 5880 5881 public void restoreInstanceState(Parcel parcel) { 5882 mIsUserEdit = parcel.readInt() != 0; 5883 mHasComposition = parcel.readInt() != 0; 5884 mExpanding = parcel.readInt() != 0; 5885 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5886 } 5887 5888 /** 5889 * Signals that a user-triggered edit is starting. 5890 */ 5891 public void beginBatchEdit() { 5892 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5893 mIsUserEdit = true; 5894 } 5895 5896 public void endBatchEdit() { 5897 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5898 mIsUserEdit = false; 5899 mPreviousOperationWasInSameBatchEdit = false; 5900 } 5901 5902 @Override 5903 public CharSequence filter(CharSequence source, int start, int end, 5904 Spanned dest, int dstart, int dend) { 5905 if (DEBUG_UNDO) { 5906 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 5907 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5908 } 5909 5910 // Check to see if this edit should be tracked for undo. 5911 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5912 return null; 5913 } 5914 5915 final boolean hadComposition = mHasComposition; 5916 mHasComposition = isComposition(source); 5917 final boolean wasExpanding = mExpanding; 5918 boolean shouldCreateSeparateState = false; 5919 if ((end - start) != (dend - dstart)) { 5920 mExpanding = (end - start) > (dend - dstart); 5921 if (hadComposition && mExpanding != wasExpanding) { 5922 shouldCreateSeparateState = true; 5923 } 5924 } 5925 5926 // Handle edit. 5927 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5928 return null; 5929 } 5930 5931 void freezeLastEdit() { 5932 mEditor.mUndoManager.beginUpdate("Edit text"); 5933 EditOperation lastEdit = getLastEdit(); 5934 if (lastEdit != null) { 5935 lastEdit.mFrozen = true; 5936 } 5937 mEditor.mUndoManager.endUpdate(); 5938 } 5939 5940 @Retention(RetentionPolicy.SOURCE) 5941 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5942 private @interface MergeMode {} 5943 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5944 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5945 /** Use {@link EditOperation#mergeWith} to merge */ 5946 private static final int MERGE_EDIT_MODE_NORMAL = 2; 5947 5948 private void handleEdit(CharSequence source, int start, int end, 5949 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5950 // An application may install a TextWatcher to provide additional modifications after 5951 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5952 // string). This results in multiple filter() calls for what the user considers to be 5953 // a single operation. Always undo the whole set of changes in one step. 5954 @MergeMode 5955 final int mergeMode; 5956 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5957 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5958 } else if (shouldCreateSeparateState) { 5959 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5960 } else { 5961 mergeMode = MERGE_EDIT_MODE_NORMAL; 5962 } 5963 // Build a new operation with all the information from this edit. 5964 String newText = TextUtils.substring(source, start, end); 5965 String oldText = TextUtils.substring(dest, dstart, dend); 5966 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5967 mHasComposition); 5968 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5969 return; 5970 } 5971 recordEdit(edit, mergeMode); 5972 } 5973 5974 private EditOperation getLastEdit() { 5975 final UndoManager um = mEditor.mUndoManager; 5976 return um.getLastOperation( 5977 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5978 } 5979 /** 5980 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5981 * If forceMerge is true then the new edit is always merged. 5982 */ 5983 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5984 // Fetch the last edit operation and attempt to merge in the new edit. 5985 final UndoManager um = mEditor.mUndoManager; 5986 um.beginUpdate("Edit text"); 5987 EditOperation lastEdit = getLastEdit(); 5988 if (lastEdit == null) { 5989 // Add this as the first edit. 5990 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5991 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5992 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5993 // Forced merges take priority because they could be the result of a non-user-edit 5994 // change and this case should not create a new undo operation. 5995 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5996 lastEdit.forceMergeWith(edit); 5997 } else if (!mIsUserEdit) { 5998 // An application directly modified the Editable outside of a text edit. Treat this 5999 // as a new change and don't attempt to merge. 6000 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 6001 um.commitState(mEditor.mUndoOwner); 6002 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6003 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 6004 // Merge succeeded, nothing else to do. 6005 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 6006 } else { 6007 // Could not merge with the last edit, so commit the last edit and add this edit. 6008 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 6009 um.commitState(mEditor.mUndoOwner); 6010 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6011 } 6012 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 6013 um.endUpdate(); 6014 } 6015 6016 private boolean canUndoEdit(CharSequence source, int start, int end, 6017 Spanned dest, int dstart, int dend) { 6018 if (!mEditor.mAllowUndo) { 6019 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 6020 return false; 6021 } 6022 6023 if (mEditor.mUndoManager.isInUndo()) { 6024 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 6025 return false; 6026 } 6027 6028 // Text filters run before input operations are applied. However, some input operations 6029 // are invalid and will throw exceptions when applied. This is common in tests. Don't 6030 // attempt to undo invalid operations. 6031 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 6032 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 6033 return false; 6034 } 6035 6036 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 6037 // on an input field. Skip no-op changes. 6038 if (start == end && dstart == dend) { 6039 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 6040 return false; 6041 } 6042 6043 return true; 6044 } 6045 6046 private static boolean isComposition(CharSequence source) { 6047 if (!(source instanceof Spannable)) { 6048 return false; 6049 } 6050 // This is a composition edit if the source has a non-zero-length composing span. 6051 Spannable text = (Spannable) source; 6052 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6053 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6054 return composeBegin < composeEnd; 6055 } 6056 6057 private boolean isInTextWatcher() { 6058 CharSequence text = mEditor.mTextView.getText(); 6059 return (text instanceof SpannableStringBuilder) 6060 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6061 } 6062 } 6063 6064 /** 6065 * An operation to undo a single "edit" to a text view. 6066 */ 6067 public static class EditOperation extends UndoOperation<Editor> { 6068 private static final int TYPE_INSERT = 0; 6069 private static final int TYPE_DELETE = 1; 6070 private static final int TYPE_REPLACE = 2; 6071 6072 private int mType; 6073 private String mOldText; 6074 private String mNewText; 6075 private int mStart; 6076 6077 private int mOldCursorPos; 6078 private int mNewCursorPos; 6079 private boolean mFrozen; 6080 private boolean mIsComposition; 6081 6082 /** 6083 * Constructs an edit operation from a text input operation on editor that replaces the 6084 * oldText starting at dstart with newText. 6085 */ 6086 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6087 boolean isComposition) { 6088 super(editor.mUndoOwner); 6089 mOldText = oldText; 6090 mNewText = newText; 6091 6092 // Determine the type of the edit. 6093 if (mNewText.length() > 0 && mOldText.length() == 0) { 6094 mType = TYPE_INSERT; 6095 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6096 mType = TYPE_DELETE; 6097 } else { 6098 mType = TYPE_REPLACE; 6099 } 6100 6101 mStart = dstart; 6102 // Store cursor data. 6103 mOldCursorPos = editor.mTextView.getSelectionStart(); 6104 mNewCursorPos = dstart + mNewText.length(); 6105 mIsComposition = isComposition; 6106 } 6107 6108 public EditOperation(Parcel src, ClassLoader loader) { 6109 super(src, loader); 6110 mType = src.readInt(); 6111 mOldText = src.readString(); 6112 mNewText = src.readString(); 6113 mStart = src.readInt(); 6114 mOldCursorPos = src.readInt(); 6115 mNewCursorPos = src.readInt(); 6116 mFrozen = src.readInt() == 1; 6117 mIsComposition = src.readInt() == 1; 6118 } 6119 6120 @Override 6121 public void writeToParcel(Parcel dest, int flags) { 6122 dest.writeInt(mType); 6123 dest.writeString(mOldText); 6124 dest.writeString(mNewText); 6125 dest.writeInt(mStart); 6126 dest.writeInt(mOldCursorPos); 6127 dest.writeInt(mNewCursorPos); 6128 dest.writeInt(mFrozen ? 1 : 0); 6129 dest.writeInt(mIsComposition ? 1 : 0); 6130 } 6131 6132 private int getNewTextEnd() { 6133 return mStart + mNewText.length(); 6134 } 6135 6136 private int getOldTextEnd() { 6137 return mStart + mOldText.length(); 6138 } 6139 6140 @Override 6141 public void commit() { 6142 } 6143 6144 @Override 6145 public void undo() { 6146 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6147 // Remove the new text and insert the old. 6148 Editor editor = getOwnerData(); 6149 Editable text = (Editable) editor.mTextView.getText(); 6150 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6151 } 6152 6153 @Override 6154 public void redo() { 6155 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6156 // Remove the old text and insert the new. 6157 Editor editor = getOwnerData(); 6158 Editable text = (Editable) editor.mTextView.getText(); 6159 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6160 } 6161 6162 /** 6163 * Attempts to merge this existing operation with a new edit. 6164 * @param edit The new edit operation. 6165 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6166 * object unchanged. 6167 */ 6168 private boolean mergeWith(EditOperation edit) { 6169 if (DEBUG_UNDO) { 6170 Log.d(TAG, "mergeWith old " + this); 6171 Log.d(TAG, "mergeWith new " + edit); 6172 } 6173 6174 if (mFrozen) { 6175 return false; 6176 } 6177 6178 switch (mType) { 6179 case TYPE_INSERT: 6180 return mergeInsertWith(edit); 6181 case TYPE_DELETE: 6182 return mergeDeleteWith(edit); 6183 case TYPE_REPLACE: 6184 return mergeReplaceWith(edit); 6185 default: 6186 return false; 6187 } 6188 } 6189 6190 private boolean mergeInsertWith(EditOperation edit) { 6191 if (edit.mType == TYPE_INSERT) { 6192 // Merge insertions that are contiguous even when it's frozen. 6193 if (getNewTextEnd() != edit.mStart) { 6194 return false; 6195 } 6196 mNewText += edit.mNewText; 6197 mNewCursorPos = edit.mNewCursorPos; 6198 mFrozen = edit.mFrozen; 6199 mIsComposition = edit.mIsComposition; 6200 return true; 6201 } 6202 if (mIsComposition && edit.mType == TYPE_REPLACE 6203 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6204 // Merge insertion with replace as they can be single insertion. 6205 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6206 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6207 mNewCursorPos = edit.mNewCursorPos; 6208 mIsComposition = edit.mIsComposition; 6209 return true; 6210 } 6211 return false; 6212 } 6213 6214 // TODO: Support forward delete. 6215 private boolean mergeDeleteWith(EditOperation edit) { 6216 // Only merge continuous deletes. 6217 if (edit.mType != TYPE_DELETE) { 6218 return false; 6219 } 6220 // Only merge deletions that are contiguous. 6221 if (mStart != edit.getOldTextEnd()) { 6222 return false; 6223 } 6224 mStart = edit.mStart; 6225 mOldText = edit.mOldText + mOldText; 6226 mNewCursorPos = edit.mNewCursorPos; 6227 mIsComposition = edit.mIsComposition; 6228 return true; 6229 } 6230 6231 private boolean mergeReplaceWith(EditOperation edit) { 6232 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6233 // Merge with adjacent insert. 6234 mNewText += edit.mNewText; 6235 mNewCursorPos = edit.mNewCursorPos; 6236 return true; 6237 } 6238 if (!mIsComposition) { 6239 return false; 6240 } 6241 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6242 && getNewTextEnd() >= edit.getOldTextEnd()) { 6243 // Merge with delete as they can be single operation. 6244 mNewText = mNewText.substring(0, edit.mStart - mStart) 6245 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6246 if (mNewText.isEmpty()) { 6247 mType = TYPE_DELETE; 6248 } 6249 mNewCursorPos = edit.mNewCursorPos; 6250 mIsComposition = edit.mIsComposition; 6251 return true; 6252 } 6253 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6254 && TextUtils.equals(mNewText, edit.mOldText)) { 6255 // Merge with the replace that replaces the same region. 6256 mNewText = edit.mNewText; 6257 mNewCursorPos = edit.mNewCursorPos; 6258 mIsComposition = edit.mIsComposition; 6259 return true; 6260 } 6261 return false; 6262 } 6263 6264 /** 6265 * Forcibly creates a single merged edit operation by simulating the entire text 6266 * contents being replaced. 6267 */ 6268 public void forceMergeWith(EditOperation edit) { 6269 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6270 if (mergeWith(edit)) { 6271 return; 6272 } 6273 Editor editor = getOwnerData(); 6274 6275 // Copy the text of the current field. 6276 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6277 // but would require two parallel implementations of modifyText() because Editable and 6278 // StringBuilder do not share an interface for replace/delete/insert. 6279 Editable editable = (Editable) editor.mTextView.getText(); 6280 Editable originalText = new SpannableStringBuilder(editable.toString()); 6281 6282 // Roll back the last operation. 6283 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6284 6285 // Clone the text again and apply the new operation. 6286 Editable finalText = new SpannableStringBuilder(editable.toString()); 6287 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6288 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6289 6290 // Convert this operation into a replace operation. 6291 mType = TYPE_REPLACE; 6292 mNewText = finalText.toString(); 6293 mOldText = originalText.toString(); 6294 mStart = 0; 6295 mNewCursorPos = edit.mNewCursorPos; 6296 mIsComposition = edit.mIsComposition; 6297 // mOldCursorPos is unchanged. 6298 } 6299 6300 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6301 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6302 // Apply the edit if it is still valid. 6303 if (isValidRange(text, deleteFrom, deleteTo) 6304 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6305 if (deleteFrom != deleteTo) { 6306 text.delete(deleteFrom, deleteTo); 6307 } 6308 if (newText.length() != 0) { 6309 text.insert(newTextInsertAt, newText); 6310 } 6311 } 6312 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6313 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6314 // TODO: Select all the text that was undone. 6315 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6316 Selection.setSelection(text, newCursorPos); 6317 } 6318 } 6319 6320 private String getTypeString() { 6321 switch (mType) { 6322 case TYPE_INSERT: 6323 return "insert"; 6324 case TYPE_DELETE: 6325 return "delete"; 6326 case TYPE_REPLACE: 6327 return "replace"; 6328 default: 6329 return ""; 6330 } 6331 } 6332 6333 @Override 6334 public String toString() { 6335 return "[mType=" + getTypeString() + ", " 6336 + "mOldText=" + mOldText + ", " 6337 + "mNewText=" + mNewText + ", " 6338 + "mStart=" + mStart + ", " 6339 + "mOldCursorPos=" + mOldCursorPos + ", " 6340 + "mNewCursorPos=" + mNewCursorPos + ", " 6341 + "mFrozen=" + mFrozen + ", " 6342 + "mIsComposition=" + mIsComposition + "]"; 6343 } 6344 6345 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6346 new Parcelable.ClassLoaderCreator<EditOperation>() { 6347 @Override 6348 public EditOperation createFromParcel(Parcel in) { 6349 return new EditOperation(in, null); 6350 } 6351 6352 @Override 6353 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6354 return new EditOperation(in, loader); 6355 } 6356 6357 @Override 6358 public EditOperation[] newArray(int size) { 6359 return new EditOperation[size]; 6360 } 6361 }; 6362 } 6363 6364 /** 6365 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6366 * These allow external applications to plug into currently selected text. 6367 */ 6368 static final class ProcessTextIntentActionsHandler { 6369 6370 private final Editor mEditor; 6371 private final TextView mTextView; 6372 private final Context mContext; 6373 private final PackageManager mPackageManager; 6374 private final String mPackageName; 6375 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6376 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6377 new SparseArray<>(); 6378 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6379 6380 private ProcessTextIntentActionsHandler(Editor editor) { 6381 mEditor = Preconditions.checkNotNull(editor); 6382 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6383 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6384 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6385 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6386 } 6387 6388 /** 6389 * Adds "PROCESS_TEXT" menu items to the specified menu. 6390 */ 6391 public void onInitializeMenu(Menu menu) { 6392 final int size = mSupportedActivities.size(); 6393 loadSupportedActivities(); 6394 for (int i = 0; i < size; i++) { 6395 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6396 menu.add(Menu.NONE, Menu.NONE, 6397 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6398 getLabel(resolveInfo)) 6399 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6400 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6401 } 6402 } 6403 6404 /** 6405 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6406 * menu item. 6407 * 6408 * @return True if the action was performed, false otherwise. 6409 */ 6410 public boolean performMenuItemAction(MenuItem item) { 6411 return fireIntent(item.getIntent()); 6412 } 6413 6414 /** 6415 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6416 */ 6417 public void initializeAccessibilityActions() { 6418 mAccessibilityIntents.clear(); 6419 mAccessibilityActions.clear(); 6420 int i = 0; 6421 loadSupportedActivities(); 6422 for (ResolveInfo resolveInfo : mSupportedActivities) { 6423 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6424 mAccessibilityActions.put( 6425 actionId, 6426 new AccessibilityNodeInfo.AccessibilityAction( 6427 actionId, getLabel(resolveInfo))); 6428 mAccessibilityIntents.put( 6429 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6430 } 6431 } 6432 6433 /** 6434 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6435 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6436 * latest accessibility actions available for this call. 6437 */ 6438 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6439 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6440 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6441 } 6442 } 6443 6444 /** 6445 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6446 * accessibility action id. 6447 * 6448 * @return True if the action was performed, false otherwise. 6449 */ 6450 public boolean performAccessibilityAction(int actionId) { 6451 return fireIntent(mAccessibilityIntents.get(actionId)); 6452 } 6453 6454 private boolean fireIntent(Intent intent) { 6455 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6456 String selectedText = mTextView.getSelectedText(); 6457 selectedText = TextUtils.trimToParcelableSize(selectedText); 6458 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, selectedText); 6459 mEditor.mPreserveSelection = true; 6460 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6461 return true; 6462 } 6463 return false; 6464 } 6465 6466 private void loadSupportedActivities() { 6467 mSupportedActivities.clear(); 6468 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6469 List<ResolveInfo> unfiltered = 6470 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6471 for (ResolveInfo info : unfiltered) { 6472 if (isSupportedActivity(info)) { 6473 mSupportedActivities.add(info); 6474 } 6475 } 6476 } 6477 6478 private boolean isSupportedActivity(ResolveInfo info) { 6479 return mPackageName.equals(info.activityInfo.packageName) 6480 || info.activityInfo.exported 6481 && (info.activityInfo.permission == null 6482 || mContext.checkSelfPermission(info.activityInfo.permission) 6483 == PackageManager.PERMISSION_GRANTED); 6484 } 6485 6486 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6487 return createProcessTextIntent() 6488 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6489 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6490 } 6491 6492 private Intent createProcessTextIntent() { 6493 return new Intent() 6494 .setAction(Intent.ACTION_PROCESS_TEXT) 6495 .setType("text/plain"); 6496 } 6497 6498 private CharSequence getLabel(ResolveInfo resolveInfo) { 6499 return resolveInfo.loadLabel(mPackageManager); 6500 } 6501 } 6502} 6503