Editor.java revision 57ec6ea1bb6b4014f97f1b83781bd7b69ac2f95c
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.IntDef; 21import android.annotation.NonNull; 22import android.annotation.Nullable; 23import android.app.PendingIntent; 24import android.app.PendingIntent.CanceledException; 25import android.content.ClipData; 26import android.content.ClipData.Item; 27import android.content.Context; 28import android.content.Intent; 29import android.content.UndoManager; 30import android.content.UndoOperation; 31import android.content.UndoOwner; 32import android.content.pm.PackageManager; 33import android.content.pm.ResolveInfo; 34import android.content.res.TypedArray; 35import android.graphics.Canvas; 36import android.graphics.Color; 37import android.graphics.Matrix; 38import android.graphics.Paint; 39import android.graphics.Path; 40import android.graphics.Rect; 41import android.graphics.RectF; 42import android.graphics.drawable.ColorDrawable; 43import android.graphics.drawable.Drawable; 44import android.metrics.LogMaker; 45import android.os.Bundle; 46import android.os.LocaleList; 47import android.os.Parcel; 48import android.os.Parcelable; 49import android.os.ParcelableParcel; 50import android.os.SystemClock; 51import android.provider.Settings; 52import android.text.DynamicLayout; 53import android.text.Editable; 54import android.text.InputFilter; 55import android.text.InputType; 56import android.text.Layout; 57import android.text.ParcelableSpan; 58import android.text.Selection; 59import android.text.SpanWatcher; 60import android.text.Spannable; 61import android.text.SpannableStringBuilder; 62import android.text.Spanned; 63import android.text.StaticLayout; 64import android.text.TextUtils; 65import android.text.method.KeyListener; 66import android.text.method.MetaKeyKeyListener; 67import android.text.method.MovementMethod; 68import android.text.method.WordIterator; 69import android.text.style.EasyEditSpan; 70import android.text.style.SuggestionRangeSpan; 71import android.text.style.SuggestionSpan; 72import android.text.style.TextAppearanceSpan; 73import android.text.style.URLSpan; 74import android.util.ArraySet; 75import android.util.DisplayMetrics; 76import android.util.Log; 77import android.util.SparseArray; 78import android.view.ActionMode; 79import android.view.ActionMode.Callback; 80import android.view.ContextMenu; 81import android.view.ContextThemeWrapper; 82import android.view.DisplayListCanvas; 83import android.view.DragAndDropPermissions; 84import android.view.DragEvent; 85import android.view.Gravity; 86import android.view.HapticFeedbackConstants; 87import android.view.InputDevice; 88import android.view.LayoutInflater; 89import android.view.Menu; 90import android.view.MenuItem; 91import android.view.MotionEvent; 92import android.view.RenderNode; 93import android.view.SubMenu; 94import android.view.View; 95import android.view.View.DragShadowBuilder; 96import android.view.View.OnClickListener; 97import android.view.ViewConfiguration; 98import android.view.ViewGroup; 99import android.view.ViewGroup.LayoutParams; 100import android.view.ViewTreeObserver; 101import android.view.WindowManager; 102import android.view.accessibility.AccessibilityNodeInfo; 103import android.view.inputmethod.CorrectionInfo; 104import android.view.inputmethod.CursorAnchorInfo; 105import android.view.inputmethod.EditorInfo; 106import android.view.inputmethod.ExtractedText; 107import android.view.inputmethod.ExtractedTextRequest; 108import android.view.inputmethod.InputConnection; 109import android.view.inputmethod.InputMethodManager; 110import android.view.textclassifier.TextClassification; 111import android.widget.AdapterView.OnItemClickListener; 112import android.widget.TextView.Drawables; 113import android.widget.TextView.OnEditorActionListener; 114 115import com.android.internal.annotations.VisibleForTesting; 116import com.android.internal.logging.MetricsLogger; 117import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 118import com.android.internal.util.ArrayUtils; 119import com.android.internal.util.GrowingArrayUtils; 120import com.android.internal.util.Preconditions; 121import com.android.internal.widget.EditableInputConnection; 122 123import java.lang.annotation.Retention; 124import java.lang.annotation.RetentionPolicy; 125import java.text.BreakIterator; 126import java.util.ArrayList; 127import java.util.Arrays; 128import java.util.Comparator; 129import java.util.HashMap; 130import java.util.List; 131 132 133/** 134 * Helper class used by TextView to handle editable text views. 135 * 136 * @hide 137 */ 138public class Editor { 139 private static final String TAG = "Editor"; 140 private static final boolean DEBUG_UNDO = false; 141 142 static final int BLINK = 500; 143 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 144 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 145 private static final int UNSET_X_VALUE = -1; 146 private static final int UNSET_LINE = -1; 147 // Tag used when the Editor maintains its own separate UndoManager. 148 private static final String UNDO_OWNER_TAG = "Editor"; 149 150 // Ordering constants used to place the Action Mode or context menu items in their menu. 151 private static final int MENU_ITEM_ORDER_ASSIST = 0; 152 private static final int MENU_ITEM_ORDER_UNDO = 2; 153 private static final int MENU_ITEM_ORDER_REDO = 3; 154 private static final int MENU_ITEM_ORDER_CUT = 4; 155 private static final int MENU_ITEM_ORDER_COPY = 5; 156 private static final int MENU_ITEM_ORDER_PASTE = 6; 157 private static final int MENU_ITEM_ORDER_SHARE = 7; 158 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 159 private static final int MENU_ITEM_ORDER_REPLACE = 9; 160 private static final int MENU_ITEM_ORDER_AUTOFILL = 10; 161 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 11; 162 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 163 164 // Each Editor manages its own undo stack. 165 private final UndoManager mUndoManager = new UndoManager(); 166 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 167 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 168 boolean mAllowUndo = true; 169 170 private final MetricsLogger mMetricsLogger = new MetricsLogger(); 171 172 // Cursor Controllers. 173 private InsertionPointCursorController mInsertionPointCursorController; 174 SelectionModifierCursorController mSelectionModifierCursorController; 175 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 176 private ActionMode mTextActionMode; 177 private boolean mInsertionControllerEnabled; 178 private boolean mSelectionControllerEnabled; 179 180 private final boolean mHapticTextHandleEnabled; 181 182 // Used to highlight a word when it is corrected by the IME 183 private CorrectionHighlighter mCorrectionHighlighter; 184 185 InputContentType mInputContentType; 186 InputMethodState mInputMethodState; 187 188 private static class TextRenderNode { 189 // Render node has 3 recording states: 190 // 1. Recorded operations are valid. 191 // #needsRecord() returns false, but needsToBeShifted is false. 192 // 2. Recorded operations are not valid, but just the position needed to be updated. 193 // #needsRecord() returns false, but needsToBeShifted is true. 194 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 195 // true. 196 RenderNode renderNode; 197 boolean isDirty; 198 // Becomes true when recorded operations can be reused, but the position has to be updated. 199 boolean needsToBeShifted; 200 public TextRenderNode(String name) { 201 renderNode = RenderNode.create(name, null); 202 isDirty = true; 203 needsToBeShifted = true; 204 } 205 boolean needsRecord() { 206 return isDirty || !renderNode.isValid(); 207 } 208 } 209 private TextRenderNode[] mTextRenderNodes; 210 211 boolean mFrozenWithFocus; 212 boolean mSelectionMoved; 213 boolean mTouchFocusSelected; 214 215 KeyListener mKeyListener; 216 int mInputType = EditorInfo.TYPE_NULL; 217 218 boolean mDiscardNextActionUp; 219 boolean mIgnoreActionUpEvent; 220 221 long mShowCursor; 222 private Blink mBlink; 223 224 boolean mCursorVisible = true; 225 boolean mSelectAllOnFocus; 226 boolean mTextIsSelectable; 227 228 CharSequence mError; 229 boolean mErrorWasChanged; 230 private ErrorPopup mErrorPopup; 231 232 /** 233 * This flag is set if the TextView tries to display an error before it 234 * is attached to the window (so its position is still unknown). 235 * It causes the error to be shown later, when onAttachedToWindow() 236 * is called. 237 */ 238 private boolean mShowErrorAfterAttach; 239 240 boolean mInBatchEditControllers; 241 boolean mShowSoftInputOnFocus = true; 242 private boolean mPreserveSelection; 243 private boolean mRestartActionModeOnNextRefresh; 244 245 private SelectionActionModeHelper mSelectionActionModeHelper; 246 247 boolean mIsBeingLongClicked; 248 249 private SuggestionsPopupWindow mSuggestionsPopupWindow; 250 SuggestionRangeSpan mSuggestionRangeSpan; 251 private Runnable mShowSuggestionRunnable; 252 253 Drawable mCursorDrawable = null; 254 255 private Drawable mSelectHandleLeft; 256 private Drawable mSelectHandleRight; 257 private Drawable mSelectHandleCenter; 258 259 // Global listener that detects changes in the global position of the TextView 260 private PositionListener mPositionListener; 261 262 private float mLastDownPositionX, mLastDownPositionY; 263 private float 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 after) { 1267 updateSpellCheckSpans(start, start + after, false); 1268 1269 // Flip flag to indicate the word iterator needs to have the text reset. 1270 mUpdateWordIteratorText = true; 1271 1272 // Hide the controllers as soon as text is modified (typing, procedural...) 1273 // We do not hide the span controllers, since they can be added when a new text is 1274 // inserted into the text view (voice IME). 1275 hideCursorControllers(); 1276 // Reset drag accelerator. 1277 if (mSelectionModifierCursorController != null) { 1278 mSelectionModifierCursorController.resetTouchOffsets(); 1279 } 1280 stopTextActionMode(); 1281 } 1282 1283 private int getLastTapPosition() { 1284 // No need to create the controller at that point, no last tap position saved 1285 if (mSelectionModifierCursorController != null) { 1286 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1287 if (lastTapPosition >= 0) { 1288 // Safety check, should not be possible. 1289 if (lastTapPosition > mTextView.getText().length()) { 1290 lastTapPosition = mTextView.getText().length(); 1291 } 1292 return lastTapPosition; 1293 } 1294 } 1295 1296 return -1; 1297 } 1298 1299 void onWindowFocusChanged(boolean hasWindowFocus) { 1300 if (hasWindowFocus) { 1301 if (mBlink != null) { 1302 mBlink.uncancel(); 1303 makeBlink(); 1304 } 1305 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1306 refreshTextActionMode(); 1307 } 1308 } else { 1309 if (mBlink != null) { 1310 mBlink.cancel(); 1311 } 1312 if (mInputContentType != null) { 1313 mInputContentType.enterDown = false; 1314 } 1315 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1316 hideCursorAndSpanControllers(); 1317 stopTextActionModeWithPreservingSelection(); 1318 if (mSuggestionsPopupWindow != null) { 1319 mSuggestionsPopupWindow.onParentLostFocus(); 1320 } 1321 1322 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1323 ensureEndedBatchEdit(); 1324 } 1325 } 1326 1327 private void updateTapState(MotionEvent event) { 1328 final int action = event.getActionMasked(); 1329 if (action == MotionEvent.ACTION_DOWN) { 1330 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1331 // Detect double tap and triple click. 1332 if (((mTapState == TAP_STATE_FIRST_TAP) 1333 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1334 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1335 <= ViewConfiguration.getDoubleTapTimeout()) { 1336 if (mTapState == TAP_STATE_FIRST_TAP) { 1337 mTapState = TAP_STATE_DOUBLE_TAP; 1338 } else { 1339 mTapState = TAP_STATE_TRIPLE_CLICK; 1340 } 1341 } else { 1342 mTapState = TAP_STATE_FIRST_TAP; 1343 } 1344 } 1345 if (action == MotionEvent.ACTION_UP) { 1346 mLastTouchUpTime = SystemClock.uptimeMillis(); 1347 } 1348 } 1349 1350 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1351 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1352 return false; 1353 } 1354 final boolean primaryButtonStateChanged = 1355 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1356 final int action = event.getActionMasked(); 1357 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1358 && !primaryButtonStateChanged) { 1359 return true; 1360 } 1361 if (action == MotionEvent.ACTION_MOVE 1362 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1363 return true; 1364 } 1365 return false; 1366 } 1367 1368 void onTouchEvent(MotionEvent event) { 1369 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1370 mLastButtonState = event.getButtonState(); 1371 if (filterOutEvent) { 1372 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1373 mDiscardNextActionUp = true; 1374 } 1375 return; 1376 } 1377 updateTapState(event); 1378 updateFloatingToolbarVisibility(event); 1379 1380 if (hasSelectionController()) { 1381 getSelectionController().onTouchEvent(event); 1382 } 1383 1384 if (mShowSuggestionRunnable != null) { 1385 mTextView.removeCallbacks(mShowSuggestionRunnable); 1386 mShowSuggestionRunnable = null; 1387 } 1388 1389 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1390 mLastUpPositionX = event.getX(); 1391 mLastUpPositionY = event.getY(); 1392 } 1393 1394 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1395 mLastDownPositionX = event.getX(); 1396 mLastDownPositionY = event.getY(); 1397 1398 // Reset this state; it will be re-set if super.onTouchEvent 1399 // causes focus to move to the view. 1400 mTouchFocusSelected = false; 1401 mIgnoreActionUpEvent = false; 1402 } 1403 } 1404 1405 private void updateFloatingToolbarVisibility(MotionEvent event) { 1406 if (mTextActionMode != null) { 1407 switch (event.getActionMasked()) { 1408 case MotionEvent.ACTION_MOVE: 1409 hideFloatingToolbar(ActionMode.DEFAULT_HIDE_DURATION); 1410 break; 1411 case MotionEvent.ACTION_UP: // fall through 1412 case MotionEvent.ACTION_CANCEL: 1413 showFloatingToolbar(); 1414 } 1415 } 1416 } 1417 1418 void hideFloatingToolbar(int duration) { 1419 if (mTextActionMode != null) { 1420 mTextView.removeCallbacks(mShowFloatingToolbar); 1421 mTextActionMode.hide(duration); 1422 } 1423 } 1424 1425 private void showFloatingToolbar() { 1426 if (mTextActionMode != null) { 1427 // Delay "show" so it doesn't interfere with click confirmations 1428 // or double-clicks that could "dismiss" the floating toolbar. 1429 int delay = ViewConfiguration.getDoubleTapTimeout(); 1430 mTextView.postDelayed(mShowFloatingToolbar, delay); 1431 1432 // This classifies the text and most likely returns before the toolbar is actually 1433 // shown. If not, it will update the toolbar with the result when classification 1434 // returns. We would rather not wait for a long running classification process. 1435 invalidateActionModeAsync(); 1436 } 1437 } 1438 1439 public void beginBatchEdit() { 1440 mInBatchEditControllers = true; 1441 final InputMethodState ims = mInputMethodState; 1442 if (ims != null) { 1443 int nesting = ++ims.mBatchEditNesting; 1444 if (nesting == 1) { 1445 ims.mCursorChanged = false; 1446 ims.mChangedDelta = 0; 1447 if (ims.mContentChanged) { 1448 // We already have a pending change from somewhere else, 1449 // so turn this into a full update. 1450 ims.mChangedStart = 0; 1451 ims.mChangedEnd = mTextView.getText().length(); 1452 } else { 1453 ims.mChangedStart = EXTRACT_UNKNOWN; 1454 ims.mChangedEnd = EXTRACT_UNKNOWN; 1455 ims.mContentChanged = false; 1456 } 1457 mUndoInputFilter.beginBatchEdit(); 1458 mTextView.onBeginBatchEdit(); 1459 } 1460 } 1461 } 1462 1463 public void endBatchEdit() { 1464 mInBatchEditControllers = false; 1465 final InputMethodState ims = mInputMethodState; 1466 if (ims != null) { 1467 int nesting = --ims.mBatchEditNesting; 1468 if (nesting == 0) { 1469 finishBatchEdit(ims); 1470 } 1471 } 1472 } 1473 1474 void ensureEndedBatchEdit() { 1475 final InputMethodState ims = mInputMethodState; 1476 if (ims != null && ims.mBatchEditNesting != 0) { 1477 ims.mBatchEditNesting = 0; 1478 finishBatchEdit(ims); 1479 } 1480 } 1481 1482 void finishBatchEdit(final InputMethodState ims) { 1483 mTextView.onEndBatchEdit(); 1484 mUndoInputFilter.endBatchEdit(); 1485 1486 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1487 mTextView.updateAfterEdit(); 1488 reportExtractedText(); 1489 } else if (ims.mCursorChanged) { 1490 // Cheesy way to get us to report the current cursor location. 1491 mTextView.invalidateCursor(); 1492 } 1493 // sendUpdateSelection knows to avoid sending if the selection did 1494 // not actually change. 1495 sendUpdateSelection(); 1496 1497 // Show drag handles if they were blocked by batch edit mode. 1498 if (mTextActionMode != null) { 1499 final CursorController cursorController = mTextView.hasSelection() 1500 ? getSelectionController() : getInsertionController(); 1501 if (cursorController != null && !cursorController.isActive() 1502 && !cursorController.isCursorBeingModified()) { 1503 cursorController.show(); 1504 } 1505 } 1506 } 1507 1508 static final int EXTRACT_NOTHING = -2; 1509 static final int EXTRACT_UNKNOWN = -1; 1510 1511 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1512 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1513 EXTRACT_UNKNOWN, outText); 1514 } 1515 1516 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1517 int partialStartOffset, int partialEndOffset, int delta, 1518 @Nullable ExtractedText outText) { 1519 if (request == null || outText == null) { 1520 return false; 1521 } 1522 1523 final CharSequence content = mTextView.getText(); 1524 if (content == null) { 1525 return false; 1526 } 1527 1528 if (partialStartOffset != EXTRACT_NOTHING) { 1529 final int N = content.length(); 1530 if (partialStartOffset < 0) { 1531 outText.partialStartOffset = outText.partialEndOffset = -1; 1532 partialStartOffset = 0; 1533 partialEndOffset = N; 1534 } else { 1535 // Now use the delta to determine the actual amount of text 1536 // we need. 1537 partialEndOffset += delta; 1538 // Adjust offsets to ensure we contain full spans. 1539 if (content instanceof Spanned) { 1540 Spanned spanned = (Spanned) content; 1541 Object[] spans = spanned.getSpans(partialStartOffset, 1542 partialEndOffset, ParcelableSpan.class); 1543 int i = spans.length; 1544 while (i > 0) { 1545 i--; 1546 int j = spanned.getSpanStart(spans[i]); 1547 if (j < partialStartOffset) partialStartOffset = j; 1548 j = spanned.getSpanEnd(spans[i]); 1549 if (j > partialEndOffset) partialEndOffset = j; 1550 } 1551 } 1552 outText.partialStartOffset = partialStartOffset; 1553 outText.partialEndOffset = partialEndOffset - delta; 1554 1555 if (partialStartOffset > N) { 1556 partialStartOffset = N; 1557 } else if (partialStartOffset < 0) { 1558 partialStartOffset = 0; 1559 } 1560 if (partialEndOffset > N) { 1561 partialEndOffset = N; 1562 } else if (partialEndOffset < 0) { 1563 partialEndOffset = 0; 1564 } 1565 } 1566 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1567 outText.text = content.subSequence(partialStartOffset, 1568 partialEndOffset); 1569 } else { 1570 outText.text = TextUtils.substring(content, partialStartOffset, 1571 partialEndOffset); 1572 } 1573 } else { 1574 outText.partialStartOffset = 0; 1575 outText.partialEndOffset = 0; 1576 outText.text = ""; 1577 } 1578 outText.flags = 0; 1579 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1580 outText.flags |= ExtractedText.FLAG_SELECTING; 1581 } 1582 if (mTextView.isSingleLine()) { 1583 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1584 } 1585 outText.startOffset = 0; 1586 outText.selectionStart = mTextView.getSelectionStart(); 1587 outText.selectionEnd = mTextView.getSelectionEnd(); 1588 return true; 1589 } 1590 1591 boolean reportExtractedText() { 1592 final Editor.InputMethodState ims = mInputMethodState; 1593 if (ims != null) { 1594 final boolean contentChanged = ims.mContentChanged; 1595 if (contentChanged || ims.mSelectionModeChanged) { 1596 ims.mContentChanged = false; 1597 ims.mSelectionModeChanged = false; 1598 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1599 if (req != null) { 1600 InputMethodManager imm = InputMethodManager.peekInstance(); 1601 if (imm != null) { 1602 if (TextView.DEBUG_EXTRACT) { 1603 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1604 + ims.mChangedStart 1605 + " end=" + ims.mChangedEnd 1606 + " delta=" + ims.mChangedDelta); 1607 } 1608 if (ims.mChangedStart < 0 && !contentChanged) { 1609 ims.mChangedStart = EXTRACT_NOTHING; 1610 } 1611 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1612 ims.mChangedDelta, ims.mExtractedText)) { 1613 if (TextView.DEBUG_EXTRACT) { 1614 Log.v(TextView.LOG_TAG, 1615 "Reporting extracted start=" 1616 + ims.mExtractedText.partialStartOffset 1617 + " end=" + ims.mExtractedText.partialEndOffset 1618 + ": " + ims.mExtractedText.text); 1619 } 1620 1621 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1622 ims.mChangedStart = EXTRACT_UNKNOWN; 1623 ims.mChangedEnd = EXTRACT_UNKNOWN; 1624 ims.mChangedDelta = 0; 1625 ims.mContentChanged = false; 1626 return true; 1627 } 1628 } 1629 } 1630 } 1631 } 1632 return false; 1633 } 1634 1635 private void sendUpdateSelection() { 1636 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1637 final InputMethodManager imm = InputMethodManager.peekInstance(); 1638 if (null != imm) { 1639 final int selectionStart = mTextView.getSelectionStart(); 1640 final int selectionEnd = mTextView.getSelectionEnd(); 1641 int candStart = -1; 1642 int candEnd = -1; 1643 if (mTextView.getText() instanceof Spannable) { 1644 final Spannable sp = (Spannable) mTextView.getText(); 1645 candStart = EditableInputConnection.getComposingSpanStart(sp); 1646 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1647 } 1648 // InputMethodManager#updateSelection skips sending the message if 1649 // none of the parameters have changed since the last time we called it. 1650 imm.updateSelection(mTextView, 1651 selectionStart, selectionEnd, candStart, candEnd); 1652 } 1653 } 1654 } 1655 1656 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1657 int cursorOffsetVertical) { 1658 final int selectionStart = mTextView.getSelectionStart(); 1659 final int selectionEnd = mTextView.getSelectionEnd(); 1660 1661 final InputMethodState ims = mInputMethodState; 1662 if (ims != null && ims.mBatchEditNesting == 0) { 1663 InputMethodManager imm = InputMethodManager.peekInstance(); 1664 if (imm != null) { 1665 if (imm.isActive(mTextView)) { 1666 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1667 // We are in extract mode and the content has changed 1668 // in some way... just report complete new text to the 1669 // input method. 1670 reportExtractedText(); 1671 } 1672 } 1673 } 1674 } 1675 1676 if (mCorrectionHighlighter != null) { 1677 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1678 } 1679 1680 if (highlight != null && selectionStart == selectionEnd && mCursorDrawable != null) { 1681 drawCursor(canvas, cursorOffsetVertical); 1682 // Rely on the drawable entirely, do not draw the cursor line. 1683 // Has to be done after the IMM related code above which relies on the highlight. 1684 highlight = null; 1685 } 1686 1687 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1688 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1689 cursorOffsetVertical); 1690 } else { 1691 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1692 } 1693 } 1694 1695 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1696 Paint highlightPaint, int cursorOffsetVertical) { 1697 final long lineRange = layout.getLineRangeForDraw(canvas); 1698 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1699 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1700 if (lastLine < 0) return; 1701 1702 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1703 firstLine, lastLine); 1704 1705 if (layout instanceof DynamicLayout) { 1706 if (mTextRenderNodes == null) { 1707 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1708 } 1709 1710 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1711 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1712 int[] blockIndices = dynamicLayout.getBlockIndices(); 1713 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1714 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1715 1716 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1717 if (blockSet != null) { 1718 for (int i = 0; i < blockSet.size(); i++) { 1719 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1720 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1721 && mTextRenderNodes[blockIndex] != null) { 1722 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1723 } 1724 } 1725 } 1726 1727 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1728 if (startBlock < 0) { 1729 startBlock = -(startBlock + 1); 1730 } 1731 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1732 1733 int startIndexToFindAvailableRenderNode = 0; 1734 int lastIndex = numberOfBlocks; 1735 1736 for (int i = startBlock; i < numberOfBlocks; i++) { 1737 final int blockIndex = blockIndices[i]; 1738 if (i >= indexFirstChangedBlock 1739 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1740 && mTextRenderNodes[blockIndex] != null) { 1741 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1742 } 1743 if (blockEndLines[i] < firstLine) { 1744 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1745 // be redrawn after they get scrolled into drawing range. 1746 continue; 1747 } 1748 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1749 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1750 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1751 if (blockEndLines[i] >= lastLine) { 1752 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1753 break; 1754 } 1755 } 1756 if (blockSet != null) { 1757 for (int i = 0; i < blockSet.size(); i++) { 1758 final int block = blockSet.valueAt(i); 1759 final int blockIndex = dynamicLayout.getBlockIndex(block); 1760 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1761 || mTextRenderNodes[blockIndex] == null 1762 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1763 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1764 layout, highlight, highlightPaint, cursorOffsetVertical, 1765 blockEndLines, blockIndices, block, numberOfBlocks, 1766 startIndexToFindAvailableRenderNode); 1767 } 1768 } 1769 } 1770 1771 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1772 } else { 1773 // Boring layout is used for empty and hint text 1774 layout.drawText(canvas, firstLine, lastLine); 1775 } 1776 } 1777 1778 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1779 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1780 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1781 int startIndexToFindAvailableRenderNode) { 1782 final int blockEndLine = blockEndLines[blockInfoIndex]; 1783 int blockIndex = blockIndices[blockInfoIndex]; 1784 1785 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1786 if (blockIsInvalid) { 1787 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1788 startIndexToFindAvailableRenderNode); 1789 // Note how dynamic layout's internal block indices get updated from Editor 1790 blockIndices[blockInfoIndex] = blockIndex; 1791 if (mTextRenderNodes[blockIndex] != null) { 1792 mTextRenderNodes[blockIndex].isDirty = true; 1793 } 1794 startIndexToFindAvailableRenderNode = blockIndex + 1; 1795 } 1796 1797 if (mTextRenderNodes[blockIndex] == null) { 1798 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1799 } 1800 1801 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1802 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1803 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1804 final int blockBeginLine = blockInfoIndex == 0 ? 1805 0 : blockEndLines[blockInfoIndex - 1] + 1; 1806 final int top = layout.getLineTop(blockBeginLine); 1807 final int bottom = layout.getLineBottom(blockEndLine); 1808 int left = 0; 1809 int right = mTextView.getWidth(); 1810 if (mTextView.getHorizontallyScrolling()) { 1811 float min = Float.MAX_VALUE; 1812 float max = Float.MIN_VALUE; 1813 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1814 min = Math.min(min, layout.getLineLeft(line)); 1815 max = Math.max(max, layout.getLineRight(line)); 1816 } 1817 left = (int) min; 1818 right = (int) (max + 0.5f); 1819 } 1820 1821 // Rebuild display list if it is invalid 1822 if (blockDisplayListIsInvalid) { 1823 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1824 right - left, bottom - top); 1825 try { 1826 // drawText is always relative to TextView's origin, this translation 1827 // brings this range of text back to the top left corner of the viewport 1828 displayListCanvas.translate(-left, -top); 1829 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1830 mTextRenderNodes[blockIndex].isDirty = false; 1831 // No need to untranslate, previous context is popped after 1832 // drawDisplayList 1833 } finally { 1834 blockDisplayList.end(displayListCanvas); 1835 // Same as drawDisplayList below, handled by our TextView's parent 1836 blockDisplayList.setClipToBounds(false); 1837 } 1838 } 1839 1840 // Valid display list only needs to update its drawing location. 1841 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1842 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1843 } 1844 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1845 return startIndexToFindAvailableRenderNode; 1846 } 1847 1848 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1849 int searchStartIndex) { 1850 int length = mTextRenderNodes.length; 1851 for (int i = searchStartIndex; i < length; i++) { 1852 boolean blockIndexFound = false; 1853 for (int j = 0; j < numberOfBlocks; j++) { 1854 if (blockIndices[j] == i) { 1855 blockIndexFound = true; 1856 break; 1857 } 1858 } 1859 if (blockIndexFound) continue; 1860 return i; 1861 } 1862 1863 // No available index found, the pool has to grow 1864 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1865 return length; 1866 } 1867 1868 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1869 final boolean translate = cursorOffsetVertical != 0; 1870 if (translate) canvas.translate(0, cursorOffsetVertical); 1871 if (mCursorDrawable != null) { 1872 mCursorDrawable.draw(canvas); 1873 } 1874 if (translate) canvas.translate(0, -cursorOffsetVertical); 1875 } 1876 1877 void invalidateHandlesAndActionMode() { 1878 if (mSelectionModifierCursorController != null) { 1879 mSelectionModifierCursorController.invalidateHandles(); 1880 } 1881 if (mInsertionPointCursorController != null) { 1882 mInsertionPointCursorController.invalidateHandle(); 1883 } 1884 if (mTextActionMode != null) { 1885 invalidateActionMode(); 1886 } 1887 } 1888 1889 /** 1890 * Invalidates all the sub-display lists that overlap the specified character range 1891 */ 1892 void invalidateTextDisplayList(Layout layout, int start, int end) { 1893 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1894 final int firstLine = layout.getLineForOffset(start); 1895 final int lastLine = layout.getLineForOffset(end); 1896 1897 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1898 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1899 int[] blockIndices = dynamicLayout.getBlockIndices(); 1900 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1901 1902 int i = 0; 1903 // Skip the blocks before firstLine 1904 while (i < numberOfBlocks) { 1905 if (blockEndLines[i] >= firstLine) break; 1906 i++; 1907 } 1908 1909 // Invalidate all subsequent blocks until lastLine is passed 1910 while (i < numberOfBlocks) { 1911 final int blockIndex = blockIndices[i]; 1912 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1913 mTextRenderNodes[blockIndex].isDirty = true; 1914 } 1915 if (blockEndLines[i] >= lastLine) break; 1916 i++; 1917 } 1918 } 1919 } 1920 1921 void invalidateTextDisplayList() { 1922 if (mTextRenderNodes != null) { 1923 for (int i = 0; i < mTextRenderNodes.length; i++) { 1924 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1925 } 1926 } 1927 } 1928 1929 void updateCursorPosition() { 1930 if (mTextView.mCursorDrawableRes == 0) { 1931 mCursorDrawable = null; 1932 return; 1933 } 1934 1935 final Layout layout = mTextView.getLayout(); 1936 final int offset = mTextView.getSelectionStart(); 1937 final int line = layout.getLineForOffset(offset); 1938 final int top = layout.getLineTop(line); 1939 final int bottom = layout.getLineBottomWithoutSpacing(line); 1940 1941 final boolean clamped = layout.shouldClampCursor(line); 1942 updateCursorPosition(top, bottom, layout.getPrimaryHorizontal(offset, clamped)); 1943 } 1944 1945 void refreshTextActionMode() { 1946 if (extractedTextModeWillBeStarted()) { 1947 mRestartActionModeOnNextRefresh = false; 1948 return; 1949 } 1950 final boolean hasSelection = mTextView.hasSelection(); 1951 final SelectionModifierCursorController selectionController = getSelectionController(); 1952 final InsertionPointCursorController insertionController = getInsertionController(); 1953 if ((selectionController != null && selectionController.isCursorBeingModified()) 1954 || (insertionController != null && insertionController.isCursorBeingModified())) { 1955 // ActionMode should be managed by the currently active cursor controller. 1956 mRestartActionModeOnNextRefresh = false; 1957 return; 1958 } 1959 if (hasSelection) { 1960 hideInsertionPointCursorController(); 1961 if (mTextActionMode == null) { 1962 if (mRestartActionModeOnNextRefresh) { 1963 // To avoid distraction, newly start action mode only when selection action 1964 // mode is being restarted. 1965 startSelectionActionModeAsync(false); 1966 } 1967 } else if (selectionController == null || !selectionController.isActive()) { 1968 // Insertion action mode is active. Avoid dismissing the selection. 1969 stopTextActionModeWithPreservingSelection(); 1970 startSelectionActionModeAsync(false); 1971 } else { 1972 mTextActionMode.invalidateContentRect(); 1973 } 1974 } else { 1975 // Insertion action mode is started only when insertion controller is explicitly 1976 // activated. 1977 if (insertionController == null || !insertionController.isActive()) { 1978 stopTextActionMode(); 1979 } else if (mTextActionMode != null) { 1980 mTextActionMode.invalidateContentRect(); 1981 } 1982 } 1983 mRestartActionModeOnNextRefresh = false; 1984 } 1985 1986 /** 1987 * Start an Insertion action mode. 1988 */ 1989 void startInsertionActionMode() { 1990 if (mInsertionActionModeRunnable != null) { 1991 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1992 } 1993 if (extractedTextModeWillBeStarted()) { 1994 return; 1995 } 1996 stopTextActionMode(); 1997 1998 ActionMode.Callback actionModeCallback = 1999 new TextActionModeCallback(false /* hasSelection */); 2000 mTextActionMode = mTextView.startActionMode( 2001 actionModeCallback, ActionMode.TYPE_FLOATING); 2002 if (mTextActionMode != null && getInsertionController() != null) { 2003 getInsertionController().show(); 2004 } 2005 } 2006 2007 @NonNull 2008 TextView getTextView() { 2009 return mTextView; 2010 } 2011 2012 @Nullable 2013 ActionMode getTextActionMode() { 2014 return mTextActionMode; 2015 } 2016 2017 void setRestartActionModeOnNextRefresh(boolean value) { 2018 mRestartActionModeOnNextRefresh = value; 2019 } 2020 2021 /** 2022 * Asynchronously starts a selection action mode using the TextClassifier. 2023 */ 2024 void startSelectionActionModeAsync(boolean adjustSelection) { 2025 getSelectionActionModeHelper().startActionModeAsync(adjustSelection); 2026 } 2027 2028 /** 2029 * Asynchronously invalidates an action mode using the TextClassifier. 2030 */ 2031 void invalidateActionModeAsync() { 2032 getSelectionActionModeHelper().invalidateActionModeAsync(); 2033 } 2034 2035 /** 2036 * Synchronously invalidates an action mode without the TextClassifier. 2037 */ 2038 private void invalidateActionMode() { 2039 if (mTextActionMode != null) { 2040 mTextActionMode.invalidate(); 2041 } 2042 } 2043 2044 private SelectionActionModeHelper getSelectionActionModeHelper() { 2045 if (mSelectionActionModeHelper == null) { 2046 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2047 } 2048 return mSelectionActionModeHelper; 2049 } 2050 2051 /** 2052 * If the TextView allows text selection, selects the current word when no existing selection 2053 * was available and starts a drag. 2054 * 2055 * @return true if the drag was started. 2056 */ 2057 private boolean selectCurrentWordAndStartDrag() { 2058 if (mInsertionActionModeRunnable != null) { 2059 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2060 } 2061 if (extractedTextModeWillBeStarted()) { 2062 return false; 2063 } 2064 if (!checkField()) { 2065 return false; 2066 } 2067 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2068 // No selection and cannot select a word. 2069 return false; 2070 } 2071 stopTextActionModeWithPreservingSelection(); 2072 getSelectionController().enterDrag( 2073 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2074 return true; 2075 } 2076 2077 /** 2078 * Checks whether a selection can be performed on the current TextView. 2079 * 2080 * @return true if a selection can be performed 2081 */ 2082 boolean checkField() { 2083 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2084 Log.w(TextView.LOG_TAG, 2085 "TextView does not support text selection. Selection cancelled."); 2086 return false; 2087 } 2088 return true; 2089 } 2090 2091 boolean startSelectionActionModeInternal() { 2092 if (extractedTextModeWillBeStarted()) { 2093 return false; 2094 } 2095 if (mTextActionMode != null) { 2096 // Text action mode is already started 2097 invalidateActionMode(); 2098 return false; 2099 } 2100 2101 if (!checkField() || !mTextView.hasSelection()) { 2102 return false; 2103 } 2104 2105 ActionMode.Callback actionModeCallback = 2106 new TextActionModeCallback(true /* hasSelection */); 2107 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2108 2109 final boolean selectionStarted = mTextActionMode != null; 2110 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2111 // Show the IME to be able to replace text, except when selecting non editable text. 2112 final InputMethodManager imm = InputMethodManager.peekInstance(); 2113 if (imm != null) { 2114 imm.showSoftInput(mTextView, 0, null); 2115 } 2116 } 2117 return selectionStarted; 2118 } 2119 2120 private boolean extractedTextModeWillBeStarted() { 2121 if (!(mTextView.isInExtractedMode())) { 2122 final InputMethodManager imm = InputMethodManager.peekInstance(); 2123 return imm != null && imm.isFullscreenMode(); 2124 } 2125 return false; 2126 } 2127 2128 /** 2129 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2130 * the current cursor position or selection range. This method is consistent with the 2131 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2132 */ 2133 private boolean shouldOfferToShowSuggestions() { 2134 CharSequence text = mTextView.getText(); 2135 if (!(text instanceof Spannable)) return false; 2136 2137 final Spannable spannable = (Spannable) text; 2138 final int selectionStart = mTextView.getSelectionStart(); 2139 final int selectionEnd = mTextView.getSelectionEnd(); 2140 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2141 SuggestionSpan.class); 2142 if (suggestionSpans.length == 0) { 2143 return false; 2144 } 2145 if (selectionStart == selectionEnd) { 2146 // Spans overlap the cursor. 2147 for (int i = 0; i < suggestionSpans.length; i++) { 2148 if (suggestionSpans[i].getSuggestions().length > 0) { 2149 return true; 2150 } 2151 } 2152 return false; 2153 } 2154 int minSpanStart = mTextView.getText().length(); 2155 int maxSpanEnd = 0; 2156 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2157 int unionOfSpansCoveringSelectionStartEnd = 0; 2158 boolean hasValidSuggestions = false; 2159 for (int i = 0; i < suggestionSpans.length; i++) { 2160 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2161 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2162 minSpanStart = Math.min(minSpanStart, spanStart); 2163 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2164 if (selectionStart < spanStart || selectionStart > spanEnd) { 2165 // The span doesn't cover the current selection start point. 2166 continue; 2167 } 2168 hasValidSuggestions = 2169 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2170 unionOfSpansCoveringSelectionStartStart = 2171 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2172 unionOfSpansCoveringSelectionStartEnd = 2173 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2174 } 2175 if (!hasValidSuggestions) { 2176 return false; 2177 } 2178 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2179 // No spans cover the selection start point. 2180 return false; 2181 } 2182 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2183 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2184 // There is a span that is not covered by the union. In this case, we soouldn't offer 2185 // to show suggestions as it's confusing. 2186 return false; 2187 } 2188 return true; 2189 } 2190 2191 /** 2192 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2193 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2194 */ 2195 private boolean isCursorInsideEasyCorrectionSpan() { 2196 Spannable spannable = (Spannable) mTextView.getText(); 2197 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2198 mTextView.getSelectionEnd(), SuggestionSpan.class); 2199 for (int i = 0; i < suggestionSpans.length; i++) { 2200 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2201 return true; 2202 } 2203 } 2204 return false; 2205 } 2206 2207 void onTouchUpEvent(MotionEvent event) { 2208 if (getSelectionActionModeHelper().resetSelection( 2209 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2210 return; 2211 } 2212 2213 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2214 hideCursorAndSpanControllers(); 2215 stopTextActionMode(); 2216 CharSequence text = mTextView.getText(); 2217 if (!selectAllGotFocus && text.length() > 0) { 2218 // Move cursor 2219 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2220 Selection.setSelection((Spannable) text, offset); 2221 if (mSpellChecker != null) { 2222 // When the cursor moves, the word that was typed may need spell check 2223 mSpellChecker.onSelectionChanged(); 2224 } 2225 2226 if (!extractedTextModeWillBeStarted()) { 2227 if (isCursorInsideEasyCorrectionSpan()) { 2228 // Cancel the single tap delayed runnable. 2229 if (mInsertionActionModeRunnable != null) { 2230 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2231 } 2232 2233 mShowSuggestionRunnable = new Runnable() { 2234 public void run() { 2235 replace(); 2236 } 2237 }; 2238 // removeCallbacks is performed on every touch 2239 mTextView.postDelayed(mShowSuggestionRunnable, 2240 ViewConfiguration.getDoubleTapTimeout()); 2241 } else if (hasInsertionController()) { 2242 getInsertionController().show(); 2243 } 2244 } 2245 } 2246 } 2247 2248 protected void stopTextActionMode() { 2249 if (mTextActionMode != null) { 2250 // This will hide the mSelectionModifierCursorController 2251 mTextActionMode.finish(); 2252 } 2253 } 2254 2255 private void stopTextActionModeWithPreservingSelection() { 2256 if (mTextActionMode != null) { 2257 mRestartActionModeOnNextRefresh = true; 2258 } 2259 mPreserveSelection = true; 2260 stopTextActionMode(); 2261 mPreserveSelection = false; 2262 } 2263 2264 /** 2265 * @return True if this view supports insertion handles. 2266 */ 2267 boolean hasInsertionController() { 2268 return mInsertionControllerEnabled; 2269 } 2270 2271 /** 2272 * @return True if this view supports selection handles. 2273 */ 2274 boolean hasSelectionController() { 2275 return mSelectionControllerEnabled; 2276 } 2277 2278 private InsertionPointCursorController getInsertionController() { 2279 if (!mInsertionControllerEnabled) { 2280 return null; 2281 } 2282 2283 if (mInsertionPointCursorController == null) { 2284 mInsertionPointCursorController = new InsertionPointCursorController(); 2285 2286 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2287 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2288 } 2289 2290 return mInsertionPointCursorController; 2291 } 2292 2293 @Nullable 2294 SelectionModifierCursorController getSelectionController() { 2295 if (!mSelectionControllerEnabled) { 2296 return null; 2297 } 2298 2299 if (mSelectionModifierCursorController == null) { 2300 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2301 2302 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2303 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2304 } 2305 2306 return mSelectionModifierCursorController; 2307 } 2308 2309 @VisibleForTesting 2310 @Nullable 2311 public Drawable getCursorDrawable() { 2312 return mCursorDrawable; 2313 } 2314 2315 private void updateCursorPosition(int top, int bottom, float horizontal) { 2316 if (mCursorDrawable == null) { 2317 mCursorDrawable = mTextView.getContext().getDrawable( 2318 mTextView.mCursorDrawableRes); 2319 } 2320 final int left = clampHorizontalPosition(mCursorDrawable, horizontal); 2321 final int width = mCursorDrawable.getIntrinsicWidth(); 2322 mCursorDrawable.setBounds(left, top - mTempRect.top, left + width, 2323 bottom + mTempRect.bottom); 2324 } 2325 2326 /** 2327 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2328 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2329 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2330 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2331 * of the view. 2332 * 2333 * @param drawable Drawable. Can be null. 2334 * @param horizontal Horizontal position for the drawable. 2335 * @return The clamped horizontal position for the drawable. 2336 */ 2337 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2338 horizontal = Math.max(0.5f, horizontal - 0.5f); 2339 if (mTempRect == null) mTempRect = new Rect(); 2340 2341 int drawableWidth = 0; 2342 if (drawable != null) { 2343 drawable.getPadding(mTempRect); 2344 drawableWidth = drawable.getIntrinsicWidth(); 2345 } else { 2346 mTempRect.setEmpty(); 2347 } 2348 2349 int scrollX = mTextView.getScrollX(); 2350 float horizontalDiff = horizontal - scrollX; 2351 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2352 - mTextView.getCompoundPaddingRight(); 2353 2354 final int left; 2355 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2356 // at the rightmost position 2357 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2358 } else if (Math.abs(horizontalDiff) <= 1f 2359 || (TextUtils.isEmpty(mTextView.getText()) 2360 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2361 && horizontal <= 1f)) { 2362 // at the leftmost position 2363 left = scrollX - mTempRect.left; 2364 } else { 2365 left = (int) horizontal - mTempRect.left; 2366 } 2367 return left; 2368 } 2369 2370 /** 2371 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2372 * a dictionary) from the current input method, provided by it calling 2373 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2374 * implementation flashes the background of the corrected word to provide feedback to the user. 2375 * 2376 * @param info The auto correct info about the text that was corrected. 2377 */ 2378 public void onCommitCorrection(CorrectionInfo info) { 2379 if (mCorrectionHighlighter == null) { 2380 mCorrectionHighlighter = new CorrectionHighlighter(); 2381 } else { 2382 mCorrectionHighlighter.invalidate(false); 2383 } 2384 2385 mCorrectionHighlighter.highlight(info); 2386 mUndoInputFilter.freezeLastEdit(); 2387 } 2388 2389 void onScrollChanged() { 2390 if (mPositionListener != null) { 2391 mPositionListener.onScrollChanged(); 2392 } 2393 if (mTextActionMode != null) { 2394 mTextActionMode.invalidateContentRect(); 2395 } 2396 } 2397 2398 /** 2399 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2400 */ 2401 private boolean shouldBlink() { 2402 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2403 2404 final int start = mTextView.getSelectionStart(); 2405 if (start < 0) return false; 2406 2407 final int end = mTextView.getSelectionEnd(); 2408 if (end < 0) return false; 2409 2410 return start == end; 2411 } 2412 2413 void makeBlink() { 2414 if (shouldBlink()) { 2415 mShowCursor = SystemClock.uptimeMillis(); 2416 if (mBlink == null) mBlink = new Blink(); 2417 mTextView.removeCallbacks(mBlink); 2418 mTextView.postDelayed(mBlink, BLINK); 2419 } else { 2420 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2421 } 2422 } 2423 2424 private class Blink implements Runnable { 2425 private boolean mCancelled; 2426 2427 public void run() { 2428 if (mCancelled) { 2429 return; 2430 } 2431 2432 mTextView.removeCallbacks(this); 2433 2434 if (shouldBlink()) { 2435 if (mTextView.getLayout() != null) { 2436 mTextView.invalidateCursorPath(); 2437 } 2438 2439 mTextView.postDelayed(this, BLINK); 2440 } 2441 } 2442 2443 void cancel() { 2444 if (!mCancelled) { 2445 mTextView.removeCallbacks(this); 2446 mCancelled = true; 2447 } 2448 } 2449 2450 void uncancel() { 2451 mCancelled = false; 2452 } 2453 } 2454 2455 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2456 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2457 com.android.internal.R.layout.text_drag_thumbnail, null); 2458 2459 if (shadowView == null) { 2460 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2461 } 2462 2463 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2464 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2465 end = TextUtils.unpackRangeEndFromLong(range); 2466 } 2467 final CharSequence text = mTextView.getTransformedText(start, end); 2468 shadowView.setText(text); 2469 shadowView.setTextColor(mTextView.getTextColors()); 2470 2471 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2472 shadowView.setGravity(Gravity.CENTER); 2473 2474 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2475 ViewGroup.LayoutParams.WRAP_CONTENT)); 2476 2477 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2478 shadowView.measure(size, size); 2479 2480 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2481 shadowView.invalidate(); 2482 return new DragShadowBuilder(shadowView); 2483 } 2484 2485 private static class DragLocalState { 2486 public TextView sourceTextView; 2487 public int start, end; 2488 2489 public DragLocalState(TextView sourceTextView, int start, int end) { 2490 this.sourceTextView = sourceTextView; 2491 this.start = start; 2492 this.end = end; 2493 } 2494 } 2495 2496 void onDrop(DragEvent event) { 2497 SpannableStringBuilder content = new SpannableStringBuilder(); 2498 2499 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2500 if (permissions != null) { 2501 permissions.takeTransient(); 2502 } 2503 2504 try { 2505 ClipData clipData = event.getClipData(); 2506 final int itemCount = clipData.getItemCount(); 2507 for (int i = 0; i < itemCount; i++) { 2508 Item item = clipData.getItemAt(i); 2509 content.append(item.coerceToStyledText(mTextView.getContext())); 2510 } 2511 } finally { 2512 if (permissions != null) { 2513 permissions.release(); 2514 } 2515 } 2516 2517 mTextView.beginBatchEdit(); 2518 mUndoInputFilter.freezeLastEdit(); 2519 try { 2520 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2521 Object localState = event.getLocalState(); 2522 DragLocalState dragLocalState = null; 2523 if (localState instanceof DragLocalState) { 2524 dragLocalState = (DragLocalState) localState; 2525 } 2526 boolean dragDropIntoItself = dragLocalState != null 2527 && dragLocalState.sourceTextView == mTextView; 2528 2529 if (dragDropIntoItself) { 2530 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2531 // A drop inside the original selection discards the drop. 2532 return; 2533 } 2534 } 2535 2536 final int originalLength = mTextView.getText().length(); 2537 int min = offset; 2538 int max = offset; 2539 2540 Selection.setSelection((Spannable) mTextView.getText(), max); 2541 mTextView.replaceText_internal(min, max, content); 2542 2543 if (dragDropIntoItself) { 2544 int dragSourceStart = dragLocalState.start; 2545 int dragSourceEnd = dragLocalState.end; 2546 if (max <= dragSourceStart) { 2547 // Inserting text before selection has shifted positions 2548 final int shift = mTextView.getText().length() - originalLength; 2549 dragSourceStart += shift; 2550 dragSourceEnd += shift; 2551 } 2552 2553 // Delete original selection 2554 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2555 2556 // Make sure we do not leave two adjacent spaces. 2557 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2558 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2559 if (nextCharIdx > prevCharIdx + 1) { 2560 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2561 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2562 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2563 } 2564 } 2565 } 2566 } finally { 2567 mTextView.endBatchEdit(); 2568 mUndoInputFilter.freezeLastEdit(); 2569 } 2570 } 2571 2572 public void addSpanWatchers(Spannable text) { 2573 final int textLength = text.length(); 2574 2575 if (mKeyListener != null) { 2576 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2577 } 2578 2579 if (mSpanController == null) { 2580 mSpanController = new SpanController(); 2581 } 2582 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2583 } 2584 2585 void setContextMenuAnchor(float x, float y) { 2586 mContextMenuAnchorX = x; 2587 mContextMenuAnchorY = y; 2588 } 2589 2590 void onCreateContextMenu(ContextMenu menu) { 2591 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2592 || Float.isNaN(mContextMenuAnchorY)) { 2593 return; 2594 } 2595 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2596 if (offset == -1) { 2597 return; 2598 } 2599 2600 stopTextActionModeWithPreservingSelection(); 2601 if (mTextView.canSelectText()) { 2602 final boolean isOnSelection = mTextView.hasSelection() 2603 && offset >= mTextView.getSelectionStart() 2604 && offset <= mTextView.getSelectionEnd(); 2605 if (!isOnSelection) { 2606 // Right clicked position is not on the selection. Remove the selection and move the 2607 // cursor to the right clicked position. 2608 Selection.setSelection((Spannable) mTextView.getText(), offset); 2609 stopTextActionMode(); 2610 } 2611 } 2612 2613 if (shouldOfferToShowSuggestions()) { 2614 final SuggestionInfo[] suggestionInfoArray = 2615 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2616 for (int i = 0; i < suggestionInfoArray.length; i++) { 2617 suggestionInfoArray[i] = new SuggestionInfo(); 2618 } 2619 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2620 com.android.internal.R.string.replace); 2621 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2622 for (int i = 0; i < numItems; i++) { 2623 final SuggestionInfo info = suggestionInfoArray[i]; 2624 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2625 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2626 @Override 2627 public boolean onMenuItemClick(MenuItem item) { 2628 replaceWithSuggestion(info); 2629 return true; 2630 } 2631 }); 2632 } 2633 } 2634 2635 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2636 com.android.internal.R.string.undo) 2637 .setAlphabeticShortcut('z') 2638 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2639 .setEnabled(mTextView.canUndo()); 2640 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2641 com.android.internal.R.string.redo) 2642 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2643 .setEnabled(mTextView.canRedo()); 2644 2645 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2646 com.android.internal.R.string.cut) 2647 .setAlphabeticShortcut('x') 2648 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2649 .setEnabled(mTextView.canCut()); 2650 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2651 com.android.internal.R.string.copy) 2652 .setAlphabeticShortcut('c') 2653 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2654 .setEnabled(mTextView.canCopy()); 2655 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2656 com.android.internal.R.string.paste) 2657 .setAlphabeticShortcut('v') 2658 .setEnabled(mTextView.canPaste()) 2659 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2660 menu.add(Menu.NONE, TextView.ID_PASTE_AS_PLAIN_TEXT, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2661 com.android.internal.R.string.paste_as_plain_text) 2662 .setEnabled(mTextView.canPasteAsPlainText()) 2663 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2664 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2665 com.android.internal.R.string.share) 2666 .setEnabled(mTextView.canShare()) 2667 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2668 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2669 com.android.internal.R.string.selectAll) 2670 .setAlphabeticShortcut('a') 2671 .setEnabled(mTextView.canSelectAllText()) 2672 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2673 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2674 android.R.string.autofill) 2675 .setEnabled(mTextView.canRequestAutofill()) 2676 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2677 2678 mPreserveSelection = true; 2679 } 2680 2681 @Nullable 2682 private SuggestionSpan findEquivalentSuggestionSpan( 2683 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2684 final Editable editable = (Editable) mTextView.getText(); 2685 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2686 // Exactly same span is found. 2687 return suggestionSpanInfo.mSuggestionSpan; 2688 } 2689 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2690 // contents. 2691 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2692 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2693 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2694 final int start = editable.getSpanStart(suggestionSpan); 2695 if (start != suggestionSpanInfo.mSpanStart) { 2696 continue; 2697 } 2698 final int end = editable.getSpanEnd(suggestionSpan); 2699 if (end != suggestionSpanInfo.mSpanEnd) { 2700 continue; 2701 } 2702 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2703 return suggestionSpan; 2704 } 2705 } 2706 return null; 2707 } 2708 2709 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2710 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2711 suggestionInfo.mSuggestionSpanInfo); 2712 if (targetSuggestionSpan == null) { 2713 // Span has been removed 2714 return; 2715 } 2716 final Editable editable = (Editable) mTextView.getText(); 2717 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2718 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2719 if (spanStart < 0 || spanEnd <= spanStart) { 2720 // Span has been removed 2721 return; 2722 } 2723 2724 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2725 // SuggestionSpans are removed by replace: save them before 2726 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2727 SuggestionSpan.class); 2728 final int length = suggestionSpans.length; 2729 int[] suggestionSpansStarts = new int[length]; 2730 int[] suggestionSpansEnds = new int[length]; 2731 int[] suggestionSpansFlags = new int[length]; 2732 for (int i = 0; i < length; i++) { 2733 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2734 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2735 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2736 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2737 2738 // Remove potential misspelled flags 2739 int suggestionSpanFlags = suggestionSpan.getFlags(); 2740 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2741 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2742 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2743 suggestionSpan.setFlags(suggestionSpanFlags); 2744 } 2745 } 2746 2747 // Notify source IME of the suggestion pick. Do this before swapping texts. 2748 targetSuggestionSpan.notifySelection( 2749 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2750 2751 // Swap text content between actual text and Suggestion span 2752 final int suggestionStart = suggestionInfo.mSuggestionStart; 2753 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2754 final String suggestion = suggestionInfo.mText.subSequence( 2755 suggestionStart, suggestionEnd).toString(); 2756 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2757 2758 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2759 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2760 2761 // Restore previous SuggestionSpans 2762 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2763 for (int i = 0; i < length; i++) { 2764 // Only spans that include the modified region make sense after replacement 2765 // Spans partially included in the replaced region are removed, there is no 2766 // way to assign them a valid range after replacement 2767 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2768 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2769 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2770 } 2771 } 2772 // Move cursor at the end of the replaced word 2773 final int newCursorPosition = spanEnd + lengthDelta; 2774 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2775 } 2776 2777 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2778 new MenuItem.OnMenuItemClickListener() { 2779 @Override 2780 public boolean onMenuItemClick(MenuItem item) { 2781 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2782 return true; 2783 } 2784 return mTextView.onTextContextMenuItem(item.getItemId()); 2785 } 2786 }; 2787 2788 /** 2789 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2790 * pop-up should be displayed. 2791 * Also monitors {@link Selection} to call back to the attached input method. 2792 */ 2793 private class SpanController implements SpanWatcher { 2794 2795 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2796 2797 private EasyEditPopupWindow mPopupWindow; 2798 2799 private Runnable mHidePopup; 2800 2801 // This function is pure but inner classes can't have static functions 2802 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2803 final Object span) { 2804 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2805 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2806 } 2807 2808 @Override 2809 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2810 if (isNonIntermediateSelectionSpan(text, span)) { 2811 sendUpdateSelection(); 2812 } else if (span instanceof EasyEditSpan) { 2813 if (mPopupWindow == null) { 2814 mPopupWindow = new EasyEditPopupWindow(); 2815 mHidePopup = new Runnable() { 2816 @Override 2817 public void run() { 2818 hide(); 2819 } 2820 }; 2821 } 2822 2823 // Make sure there is only at most one EasyEditSpan in the text 2824 if (mPopupWindow.mEasyEditSpan != null) { 2825 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2826 } 2827 2828 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2829 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2830 @Override 2831 public void onDeleteClick(EasyEditSpan span) { 2832 Editable editable = (Editable) mTextView.getText(); 2833 int start = editable.getSpanStart(span); 2834 int end = editable.getSpanEnd(span); 2835 if (start >= 0 && end >= 0) { 2836 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2837 mTextView.deleteText_internal(start, end); 2838 } 2839 editable.removeSpan(span); 2840 } 2841 }); 2842 2843 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2844 // The window is not visible yet, ignore the text change. 2845 return; 2846 } 2847 2848 if (mTextView.getLayout() == null) { 2849 // The view has not been laid out yet, ignore the text change 2850 return; 2851 } 2852 2853 if (extractedTextModeWillBeStarted()) { 2854 // The input is in extract mode. Do not handle the easy edit in 2855 // the original TextView, as the ExtractEditText will do 2856 return; 2857 } 2858 2859 mPopupWindow.show(); 2860 mTextView.removeCallbacks(mHidePopup); 2861 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2862 } 2863 } 2864 2865 @Override 2866 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2867 if (isNonIntermediateSelectionSpan(text, span)) { 2868 sendUpdateSelection(); 2869 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2870 hide(); 2871 } 2872 } 2873 2874 @Override 2875 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2876 int newStart, int newEnd) { 2877 if (isNonIntermediateSelectionSpan(text, span)) { 2878 sendUpdateSelection(); 2879 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2880 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2881 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2882 text.removeSpan(easyEditSpan); 2883 } 2884 } 2885 2886 public void hide() { 2887 if (mPopupWindow != null) { 2888 mPopupWindow.hide(); 2889 mTextView.removeCallbacks(mHidePopup); 2890 } 2891 } 2892 2893 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2894 try { 2895 PendingIntent pendingIntent = span.getPendingIntent(); 2896 if (pendingIntent != null) { 2897 Intent intent = new Intent(); 2898 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2899 pendingIntent.send(mTextView.getContext(), 0, intent); 2900 } 2901 } catch (CanceledException e) { 2902 // This should not happen, as we should try to send the intent only once. 2903 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2904 } 2905 } 2906 } 2907 2908 /** 2909 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2910 */ 2911 private interface EasyEditDeleteListener { 2912 2913 /** 2914 * Clicks the delete pop-up. 2915 */ 2916 void onDeleteClick(EasyEditSpan span); 2917 } 2918 2919 /** 2920 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2921 * by {@link SpanController}. 2922 */ 2923 private class EasyEditPopupWindow extends PinnedPopupWindow 2924 implements OnClickListener { 2925 private static final int POPUP_TEXT_LAYOUT = 2926 com.android.internal.R.layout.text_edit_action_popup_text; 2927 private TextView mDeleteTextView; 2928 private EasyEditSpan mEasyEditSpan; 2929 private EasyEditDeleteListener mOnDeleteListener; 2930 2931 @Override 2932 protected void createPopupWindow() { 2933 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2934 com.android.internal.R.attr.textSelectHandleWindowStyle); 2935 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2936 mPopupWindow.setClippingEnabled(true); 2937 } 2938 2939 @Override 2940 protected void initContentView() { 2941 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2942 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2943 mContentView = linearLayout; 2944 mContentView.setBackgroundResource( 2945 com.android.internal.R.drawable.text_edit_side_paste_window); 2946 2947 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 2948 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2949 2950 LayoutParams wrapContent = new LayoutParams( 2951 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2952 2953 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2954 mDeleteTextView.setLayoutParams(wrapContent); 2955 mDeleteTextView.setText(com.android.internal.R.string.delete); 2956 mDeleteTextView.setOnClickListener(this); 2957 mContentView.addView(mDeleteTextView); 2958 } 2959 2960 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2961 mEasyEditSpan = easyEditSpan; 2962 } 2963 2964 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2965 mOnDeleteListener = listener; 2966 } 2967 2968 @Override 2969 public void onClick(View view) { 2970 if (view == mDeleteTextView 2971 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2972 && mOnDeleteListener != null) { 2973 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2974 } 2975 } 2976 2977 @Override 2978 public void hide() { 2979 if (mEasyEditSpan != null) { 2980 mEasyEditSpan.setDeleteEnabled(false); 2981 } 2982 mOnDeleteListener = null; 2983 super.hide(); 2984 } 2985 2986 @Override 2987 protected int getTextOffset() { 2988 // Place the pop-up at the end of the span 2989 Editable editable = (Editable) mTextView.getText(); 2990 return editable.getSpanEnd(mEasyEditSpan); 2991 } 2992 2993 @Override 2994 protected int getVerticalLocalPosition(int line) { 2995 final Layout layout = mTextView.getLayout(); 2996 return layout.getLineBottomWithoutSpacing(line); 2997 } 2998 2999 @Override 3000 protected int clipVertically(int positionY) { 3001 // As we display the pop-up below the span, no vertical clipping is required. 3002 return positionY; 3003 } 3004 } 3005 3006 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 3007 // 3 handles 3008 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 3009 // 1 CursorAnchorInfoNotifier 3010 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 3011 private TextViewPositionListener[] mPositionListeners = 3012 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 3013 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 3014 private boolean mPositionHasChanged = true; 3015 // Absolute position of the TextView with respect to its parent window 3016 private int mPositionX, mPositionY; 3017 private int mPositionXOnScreen, mPositionYOnScreen; 3018 private int mNumberOfListeners; 3019 private boolean mScrollHasChanged; 3020 final int[] mTempCoords = new int[2]; 3021 3022 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 3023 if (mNumberOfListeners == 0) { 3024 updatePosition(); 3025 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3026 vto.addOnPreDrawListener(this); 3027 } 3028 3029 int emptySlotIndex = -1; 3030 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3031 TextViewPositionListener listener = mPositionListeners[i]; 3032 if (listener == positionListener) { 3033 return; 3034 } else if (emptySlotIndex < 0 && listener == null) { 3035 emptySlotIndex = i; 3036 } 3037 } 3038 3039 mPositionListeners[emptySlotIndex] = positionListener; 3040 mCanMove[emptySlotIndex] = canMove; 3041 mNumberOfListeners++; 3042 } 3043 3044 public void removeSubscriber(TextViewPositionListener positionListener) { 3045 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3046 if (mPositionListeners[i] == positionListener) { 3047 mPositionListeners[i] = null; 3048 mNumberOfListeners--; 3049 break; 3050 } 3051 } 3052 3053 if (mNumberOfListeners == 0) { 3054 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3055 vto.removeOnPreDrawListener(this); 3056 } 3057 } 3058 3059 public int getPositionX() { 3060 return mPositionX; 3061 } 3062 3063 public int getPositionY() { 3064 return mPositionY; 3065 } 3066 3067 public int getPositionXOnScreen() { 3068 return mPositionXOnScreen; 3069 } 3070 3071 public int getPositionYOnScreen() { 3072 return mPositionYOnScreen; 3073 } 3074 3075 @Override 3076 public boolean onPreDraw() { 3077 updatePosition(); 3078 3079 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3080 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3081 TextViewPositionListener positionListener = mPositionListeners[i]; 3082 if (positionListener != null) { 3083 positionListener.updatePosition(mPositionX, mPositionY, 3084 mPositionHasChanged, mScrollHasChanged); 3085 } 3086 } 3087 } 3088 3089 mScrollHasChanged = false; 3090 return true; 3091 } 3092 3093 private void updatePosition() { 3094 mTextView.getLocationInWindow(mTempCoords); 3095 3096 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3097 3098 mPositionX = mTempCoords[0]; 3099 mPositionY = mTempCoords[1]; 3100 3101 mTextView.getLocationOnScreen(mTempCoords); 3102 3103 mPositionXOnScreen = mTempCoords[0]; 3104 mPositionYOnScreen = mTempCoords[1]; 3105 } 3106 3107 public void onScrollChanged() { 3108 mScrollHasChanged = true; 3109 } 3110 } 3111 3112 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3113 protected PopupWindow mPopupWindow; 3114 protected ViewGroup mContentView; 3115 int mPositionX, mPositionY; 3116 int mClippingLimitLeft, mClippingLimitRight; 3117 3118 protected abstract void createPopupWindow(); 3119 protected abstract void initContentView(); 3120 protected abstract int getTextOffset(); 3121 protected abstract int getVerticalLocalPosition(int line); 3122 protected abstract int clipVertically(int positionY); 3123 protected void setUp() { 3124 } 3125 3126 public PinnedPopupWindow() { 3127 // Due to calling subclass methods in base constructor, subclass constructor is not 3128 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3129 // a chance to initialize subclasses, call setUp() method here. 3130 // TODO: It is good to extract non trivial initialization code from constructor. 3131 setUp(); 3132 3133 createPopupWindow(); 3134 3135 mPopupWindow.setWindowLayoutType( 3136 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3137 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3138 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3139 3140 initContentView(); 3141 3142 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3143 ViewGroup.LayoutParams.WRAP_CONTENT); 3144 mContentView.setLayoutParams(wrapContent); 3145 3146 mPopupWindow.setContentView(mContentView); 3147 } 3148 3149 public void show() { 3150 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3151 3152 computeLocalPosition(); 3153 3154 final PositionListener positionListener = getPositionListener(); 3155 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3156 } 3157 3158 protected void measureContent() { 3159 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3160 mContentView.measure( 3161 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3162 View.MeasureSpec.AT_MOST), 3163 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3164 View.MeasureSpec.AT_MOST)); 3165 } 3166 3167 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3168 * positioned according to viewportToContentHorizontalOffset. 3169 * 3170 * This method assumes that mContentView has properly been measured from its content. */ 3171 private void computeLocalPosition() { 3172 measureContent(); 3173 final int width = mContentView.getMeasuredWidth(); 3174 final int offset = getTextOffset(); 3175 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3176 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3177 3178 final int line = mTextView.getLayout().getLineForOffset(offset); 3179 mPositionY = getVerticalLocalPosition(line); 3180 mPositionY += mTextView.viewportToContentVerticalOffset(); 3181 } 3182 3183 private void updatePosition(int parentPositionX, int parentPositionY) { 3184 int positionX = parentPositionX + mPositionX; 3185 int positionY = parentPositionY + mPositionY; 3186 3187 positionY = clipVertically(positionY); 3188 3189 // Horizontal clipping 3190 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3191 final int width = mContentView.getMeasuredWidth(); 3192 positionX = Math.min( 3193 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3194 positionX = Math.max(-mClippingLimitLeft, positionX); 3195 3196 if (isShowing()) { 3197 mPopupWindow.update(positionX, positionY, -1, -1); 3198 } else { 3199 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3200 positionX, positionY); 3201 } 3202 } 3203 3204 public void hide() { 3205 if (!isShowing()) { 3206 return; 3207 } 3208 mPopupWindow.dismiss(); 3209 getPositionListener().removeSubscriber(this); 3210 } 3211 3212 @Override 3213 public void updatePosition(int parentPositionX, int parentPositionY, 3214 boolean parentPositionChanged, boolean parentScrolled) { 3215 // Either parentPositionChanged or parentScrolled is true, check if still visible 3216 if (isShowing() && isOffsetVisible(getTextOffset())) { 3217 if (parentScrolled) computeLocalPosition(); 3218 updatePosition(parentPositionX, parentPositionY); 3219 } else { 3220 hide(); 3221 } 3222 } 3223 3224 public boolean isShowing() { 3225 return mPopupWindow.isShowing(); 3226 } 3227 } 3228 3229 private static final class SuggestionInfo { 3230 // Range of actual suggestion within mText 3231 int mSuggestionStart, mSuggestionEnd; 3232 3233 // The SuggestionSpan that this TextView represents 3234 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3235 3236 // The index of this suggestion inside suggestionSpan 3237 int mSuggestionIndex; 3238 3239 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3240 3241 void clear() { 3242 mSuggestionSpanInfo.clear(); 3243 mText.clear(); 3244 } 3245 3246 // Utility method to set attributes about a SuggestionSpan. 3247 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3248 mSuggestionSpanInfo.mSuggestionSpan = span; 3249 mSuggestionSpanInfo.mSpanStart = spanStart; 3250 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3251 } 3252 } 3253 3254 private static final class SuggestionSpanInfo { 3255 // The SuggestionSpan; 3256 @Nullable 3257 SuggestionSpan mSuggestionSpan; 3258 3259 // The SuggestionSpan start position 3260 int mSpanStart; 3261 3262 // The SuggestionSpan end position 3263 int mSpanEnd; 3264 3265 void clear() { 3266 mSuggestionSpan = null; 3267 } 3268 } 3269 3270 private class SuggestionHelper { 3271 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3272 new SuggestionSpanComparator(); 3273 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3274 new HashMap<SuggestionSpan, Integer>(); 3275 3276 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3277 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3278 final int flag1 = span1.getFlags(); 3279 final int flag2 = span2.getFlags(); 3280 if (flag1 != flag2) { 3281 // The order here should match what is used in updateDrawState 3282 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3283 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3284 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3285 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3286 if (easy1 && !misspelled1) return -1; 3287 if (easy2 && !misspelled2) return 1; 3288 if (misspelled1) return -1; 3289 if (misspelled2) return 1; 3290 } 3291 3292 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3293 } 3294 } 3295 3296 /** 3297 * Returns the suggestion spans that cover the current cursor position. The suggestion 3298 * spans are sorted according to the length of text that they are attached to. 3299 */ 3300 private SuggestionSpan[] getSortedSuggestionSpans() { 3301 int pos = mTextView.getSelectionStart(); 3302 Spannable spannable = (Spannable) mTextView.getText(); 3303 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3304 3305 mSpansLengths.clear(); 3306 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3307 int start = spannable.getSpanStart(suggestionSpan); 3308 int end = spannable.getSpanEnd(suggestionSpan); 3309 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3310 } 3311 3312 // The suggestions are sorted according to their types (easy correction first, then 3313 // misspelled) and to the length of the text that they cover (shorter first). 3314 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3315 mSpansLengths.clear(); 3316 3317 return suggestionSpans; 3318 } 3319 3320 /** 3321 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3322 * position. 3323 * 3324 * @param suggestionInfos SuggestionInfo array the results will be set. 3325 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3326 * @return the number of suggestions actually fetched. 3327 */ 3328 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3329 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3330 final Spannable spannable = (Spannable) mTextView.getText(); 3331 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3332 final int nbSpans = suggestionSpans.length; 3333 if (nbSpans == 0) return 0; 3334 3335 int numberOfSuggestions = 0; 3336 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3337 final int spanStart = spannable.getSpanStart(suggestionSpan); 3338 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3339 3340 if (misspelledSpanInfo != null 3341 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3342 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3343 misspelledSpanInfo.mSpanStart = spanStart; 3344 misspelledSpanInfo.mSpanEnd = spanEnd; 3345 } 3346 3347 final String[] suggestions = suggestionSpan.getSuggestions(); 3348 final int nbSuggestions = suggestions.length; 3349 suggestionLoop: 3350 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3351 final String suggestion = suggestions[suggestionIndex]; 3352 for (int i = 0; i < numberOfSuggestions; i++) { 3353 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3354 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3355 final int otherSpanStart = 3356 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3357 final int otherSpanEnd = 3358 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3359 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3360 continue suggestionLoop; 3361 } 3362 } 3363 } 3364 3365 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3366 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3367 suggestionInfo.mSuggestionIndex = suggestionIndex; 3368 suggestionInfo.mSuggestionStart = 0; 3369 suggestionInfo.mSuggestionEnd = suggestion.length(); 3370 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3371 numberOfSuggestions++; 3372 if (numberOfSuggestions >= suggestionInfos.length) { 3373 return numberOfSuggestions; 3374 } 3375 } 3376 } 3377 return numberOfSuggestions; 3378 } 3379 } 3380 3381 @VisibleForTesting 3382 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3383 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3384 3385 // Key of intent extras for inserting new word into user dictionary. 3386 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3387 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3388 3389 private SuggestionInfo[] mSuggestionInfos; 3390 private int mNumberOfSuggestions; 3391 private boolean mCursorWasVisibleBeforeSuggestions; 3392 private boolean mIsShowingUp = false; 3393 private SuggestionAdapter mSuggestionsAdapter; 3394 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3395 private TextView mAddToDictionaryButton; 3396 private TextView mDeleteButton; 3397 private ListView mSuggestionListView; 3398 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3399 private int mContainerMarginWidth; 3400 private int mContainerMarginTop; 3401 private LinearLayout mContainerView; 3402 private Context mContext; // TODO: Make mContext final. 3403 3404 private class CustomPopupWindow extends PopupWindow { 3405 3406 @Override 3407 public void dismiss() { 3408 if (!isShowing()) { 3409 return; 3410 } 3411 super.dismiss(); 3412 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3413 3414 // Safe cast since show() checks that mTextView.getText() is an Editable 3415 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3416 3417 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3418 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3419 getInsertionController().show(); 3420 } 3421 } 3422 } 3423 3424 public SuggestionsPopupWindow() { 3425 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3426 } 3427 3428 @Override 3429 protected void setUp() { 3430 mContext = applyDefaultTheme(mTextView.getContext()); 3431 mHighlightSpan = new TextAppearanceSpan(mContext, 3432 mTextView.mTextEditSuggestionHighlightStyle); 3433 } 3434 3435 private Context applyDefaultTheme(Context originalContext) { 3436 TypedArray a = originalContext.obtainStyledAttributes( 3437 new int[]{com.android.internal.R.attr.isLightTheme}); 3438 boolean isLightTheme = a.getBoolean(0, true); 3439 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3440 : R.style.ThemeOverlay_Material_Dark; 3441 a.recycle(); 3442 return new ContextThemeWrapper(originalContext, themeId); 3443 } 3444 3445 @Override 3446 protected void createPopupWindow() { 3447 mPopupWindow = new CustomPopupWindow(); 3448 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3449 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3450 mPopupWindow.setFocusable(true); 3451 mPopupWindow.setClippingEnabled(false); 3452 } 3453 3454 @Override 3455 protected void initContentView() { 3456 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3457 Context.LAYOUT_INFLATER_SERVICE); 3458 mContentView = (ViewGroup) inflater.inflate( 3459 mTextView.mTextEditSuggestionContainerLayout, null); 3460 3461 mContainerView = (LinearLayout) mContentView.findViewById( 3462 com.android.internal.R.id.suggestionWindowContainer); 3463 ViewGroup.MarginLayoutParams lp = 3464 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3465 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3466 mContainerMarginTop = lp.topMargin; 3467 mClippingLimitLeft = lp.leftMargin; 3468 mClippingLimitRight = lp.rightMargin; 3469 3470 mSuggestionListView = (ListView) mContentView.findViewById( 3471 com.android.internal.R.id.suggestionContainer); 3472 3473 mSuggestionsAdapter = new SuggestionAdapter(); 3474 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3475 mSuggestionListView.setOnItemClickListener(this); 3476 3477 // Inflate the suggestion items once and for all. 3478 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3479 for (int i = 0; i < mSuggestionInfos.length; i++) { 3480 mSuggestionInfos[i] = new SuggestionInfo(); 3481 } 3482 3483 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3484 com.android.internal.R.id.addToDictionaryButton); 3485 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3486 public void onClick(View v) { 3487 final SuggestionSpan misspelledSpan = 3488 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3489 if (misspelledSpan == null) { 3490 // Span has been removed. 3491 return; 3492 } 3493 final Editable editable = (Editable) mTextView.getText(); 3494 final int spanStart = editable.getSpanStart(misspelledSpan); 3495 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3496 if (spanStart < 0 || spanEnd <= spanStart) { 3497 return; 3498 } 3499 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3500 3501 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3502 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3503 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3504 mTextView.getTextServicesLocale().toString()); 3505 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3506 mTextView.getContext().startActivity(intent); 3507 // There is no way to know if the word was indeed added. Re-check. 3508 // TODO The ExtractEditText should remove the span in the original text instead 3509 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3510 Selection.setSelection(editable, spanEnd); 3511 updateSpellCheckSpans(spanStart, spanEnd, false); 3512 hideWithCleanUp(); 3513 } 3514 }); 3515 3516 mDeleteButton = (TextView) mContentView.findViewById( 3517 com.android.internal.R.id.deleteButton); 3518 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3519 public void onClick(View v) { 3520 final Editable editable = (Editable) mTextView.getText(); 3521 3522 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3523 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3524 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3525 // Do not leave two adjacent spaces after deletion, or one at beginning of 3526 // text 3527 if (spanUnionEnd < editable.length() 3528 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3529 && (spanUnionStart == 0 3530 || Character.isSpaceChar( 3531 editable.charAt(spanUnionStart - 1)))) { 3532 spanUnionEnd = spanUnionEnd + 1; 3533 } 3534 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3535 } 3536 hideWithCleanUp(); 3537 } 3538 }); 3539 3540 } 3541 3542 public boolean isShowingUp() { 3543 return mIsShowingUp; 3544 } 3545 3546 public void onParentLostFocus() { 3547 mIsShowingUp = false; 3548 } 3549 3550 private class SuggestionAdapter extends BaseAdapter { 3551 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3552 Context.LAYOUT_INFLATER_SERVICE); 3553 3554 @Override 3555 public int getCount() { 3556 return mNumberOfSuggestions; 3557 } 3558 3559 @Override 3560 public Object getItem(int position) { 3561 return mSuggestionInfos[position]; 3562 } 3563 3564 @Override 3565 public long getItemId(int position) { 3566 return position; 3567 } 3568 3569 @Override 3570 public View getView(int position, View convertView, ViewGroup parent) { 3571 TextView textView = (TextView) convertView; 3572 3573 if (textView == null) { 3574 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3575 parent, false); 3576 } 3577 3578 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3579 textView.setText(suggestionInfo.mText); 3580 return textView; 3581 } 3582 } 3583 3584 @VisibleForTesting 3585 public ViewGroup getContentViewForTesting() { 3586 return mContentView; 3587 } 3588 3589 @Override 3590 public void show() { 3591 if (!(mTextView.getText() instanceof Editable)) return; 3592 if (extractedTextModeWillBeStarted()) { 3593 return; 3594 } 3595 3596 if (updateSuggestions()) { 3597 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3598 mTextView.setCursorVisible(false); 3599 mIsShowingUp = true; 3600 super.show(); 3601 } 3602 } 3603 3604 @Override 3605 protected void measureContent() { 3606 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3607 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3608 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3609 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3610 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3611 3612 int width = 0; 3613 View view = null; 3614 for (int i = 0; i < mNumberOfSuggestions; i++) { 3615 view = mSuggestionsAdapter.getView(i, view, mContentView); 3616 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3617 view.measure(horizontalMeasure, verticalMeasure); 3618 width = Math.max(width, view.getMeasuredWidth()); 3619 } 3620 3621 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3622 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3623 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3624 } 3625 3626 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3627 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3628 3629 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3630 + mContainerMarginWidth; 3631 3632 // Enforce the width based on actual text widths 3633 mContentView.measure( 3634 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3635 verticalMeasure); 3636 3637 Drawable popupBackground = mPopupWindow.getBackground(); 3638 if (popupBackground != null) { 3639 if (mTempRect == null) mTempRect = new Rect(); 3640 popupBackground.getPadding(mTempRect); 3641 width += mTempRect.left + mTempRect.right; 3642 } 3643 mPopupWindow.setWidth(width); 3644 } 3645 3646 @Override 3647 protected int getTextOffset() { 3648 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3649 } 3650 3651 @Override 3652 protected int getVerticalLocalPosition(int line) { 3653 final Layout layout = mTextView.getLayout(); 3654 return layout.getLineBottomWithoutSpacing(line) - mContainerMarginTop; 3655 } 3656 3657 @Override 3658 protected int clipVertically(int positionY) { 3659 final int height = mContentView.getMeasuredHeight(); 3660 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3661 return Math.min(positionY, displayMetrics.heightPixels - height); 3662 } 3663 3664 private void hideWithCleanUp() { 3665 for (final SuggestionInfo info : mSuggestionInfos) { 3666 info.clear(); 3667 } 3668 mMisspelledSpanInfo.clear(); 3669 hide(); 3670 } 3671 3672 private boolean updateSuggestions() { 3673 Spannable spannable = (Spannable) mTextView.getText(); 3674 mNumberOfSuggestions = 3675 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3676 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3677 return false; 3678 } 3679 3680 int spanUnionStart = mTextView.getText().length(); 3681 int spanUnionEnd = 0; 3682 3683 for (int i = 0; i < mNumberOfSuggestions; i++) { 3684 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3685 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3686 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3687 } 3688 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3689 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3690 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3691 } 3692 3693 for (int i = 0; i < mNumberOfSuggestions; i++) { 3694 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3695 } 3696 3697 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3698 int addToDictionaryButtonVisibility = View.GONE; 3699 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3700 if (mMisspelledSpanInfo.mSpanStart >= 0 3701 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3702 addToDictionaryButtonVisibility = View.VISIBLE; 3703 } 3704 } 3705 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3706 3707 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3708 final int underlineColor; 3709 if (mNumberOfSuggestions != 0) { 3710 underlineColor = 3711 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3712 } else { 3713 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3714 } 3715 3716 if (underlineColor == 0) { 3717 // Fallback on the default highlight color when the first span does not provide one 3718 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3719 } else { 3720 final float BACKGROUND_TRANSPARENCY = 0.4f; 3721 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3722 mSuggestionRangeSpan.setBackgroundColor( 3723 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3724 } 3725 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3726 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3727 3728 mSuggestionsAdapter.notifyDataSetChanged(); 3729 return true; 3730 } 3731 3732 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3733 int unionEnd) { 3734 final Spannable text = (Spannable) mTextView.getText(); 3735 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3736 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3737 3738 // Adjust the start/end of the suggestion span 3739 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3740 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3741 + suggestionInfo.mText.length(); 3742 3743 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3744 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3745 3746 // Add the text before and after the span. 3747 final String textAsString = text.toString(); 3748 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3749 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3750 } 3751 3752 @Override 3753 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3754 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3755 replaceWithSuggestion(suggestionInfo); 3756 hideWithCleanUp(); 3757 } 3758 } 3759 3760 /** 3761 * An ActionMode Callback class that is used to provide actions while in text insertion or 3762 * selection mode. 3763 * 3764 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3765 * actions, depending on which of these this TextView supports and the current selection. 3766 */ 3767 private class TextActionModeCallback extends ActionMode.Callback2 { 3768 private final Path mSelectionPath = new Path(); 3769 private final RectF mSelectionBounds = new RectF(); 3770 private final boolean mHasSelection; 3771 private final int mHandleHeight; 3772 3773 public TextActionModeCallback(boolean hasSelection) { 3774 mHasSelection = hasSelection; 3775 if (mHasSelection) { 3776 SelectionModifierCursorController selectionController = getSelectionController(); 3777 if (selectionController.mStartHandle == null) { 3778 // As these are for initializing selectionController, hide() must be called. 3779 selectionController.initDrawables(); 3780 selectionController.initHandles(); 3781 selectionController.hide(); 3782 } 3783 mHandleHeight = Math.max( 3784 mSelectHandleLeft.getMinimumHeight(), 3785 mSelectHandleRight.getMinimumHeight()); 3786 } else { 3787 InsertionPointCursorController insertionController = getInsertionController(); 3788 if (insertionController != null) { 3789 insertionController.getHandle(); 3790 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3791 } else { 3792 mHandleHeight = 0; 3793 } 3794 } 3795 } 3796 3797 @Override 3798 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3799 mode.setTitle(null); 3800 mode.setSubtitle(null); 3801 mode.setTitleOptionalHint(true); 3802 populateMenuWithItems(menu); 3803 3804 Callback customCallback = getCustomCallback(); 3805 if (customCallback != null) { 3806 if (!customCallback.onCreateActionMode(mode, menu)) { 3807 // The custom mode can choose to cancel the action mode, dismiss selection. 3808 Selection.setSelection((Spannable) mTextView.getText(), 3809 mTextView.getSelectionEnd()); 3810 return false; 3811 } 3812 } 3813 3814 if (mTextView.canProcessText()) { 3815 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3816 } 3817 3818 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3819 if (mHasSelection && !mTextView.hasTransientState()) { 3820 mTextView.setHasTransientState(true); 3821 } 3822 return true; 3823 } else { 3824 return false; 3825 } 3826 } 3827 3828 private Callback getCustomCallback() { 3829 return mHasSelection 3830 ? mCustomSelectionActionModeCallback 3831 : mCustomInsertionActionModeCallback; 3832 } 3833 3834 private void populateMenuWithItems(Menu menu) { 3835 if (mTextView.canCut()) { 3836 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3837 com.android.internal.R.string.cut) 3838 .setAlphabeticShortcut('x') 3839 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3840 } 3841 3842 if (mTextView.canCopy()) { 3843 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3844 com.android.internal.R.string.copy) 3845 .setAlphabeticShortcut('c') 3846 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3847 } 3848 3849 if (mTextView.canPaste()) { 3850 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3851 com.android.internal.R.string.paste) 3852 .setAlphabeticShortcut('v') 3853 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3854 } 3855 3856 if (mTextView.canShare()) { 3857 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3858 com.android.internal.R.string.share) 3859 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3860 } 3861 3862 if (mTextView.canRequestAutofill()) { 3863 final String selected = mTextView.getSelectedText(); 3864 if (selected == null || selected.isEmpty()) { 3865 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3866 com.android.internal.R.string.autofill) 3867 .setShowAsAction(MenuItem.SHOW_AS_OVERFLOW_ALWAYS); 3868 } 3869 } 3870 3871 if (mTextView.canPasteAsPlainText()) { 3872 menu.add( 3873 Menu.NONE, 3874 TextView.ID_PASTE_AS_PLAIN_TEXT, 3875 MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 3876 com.android.internal.R.string.paste_as_plain_text) 3877 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3878 } 3879 3880 updateSelectAllItem(menu); 3881 updateReplaceItem(menu); 3882 updateAssistMenuItem(menu); 3883 } 3884 3885 @Override 3886 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3887 updateSelectAllItem(menu); 3888 updateReplaceItem(menu); 3889 updateAssistMenuItem(menu); 3890 3891 Callback customCallback = getCustomCallback(); 3892 if (customCallback != null) { 3893 return customCallback.onPrepareActionMode(mode, menu); 3894 } 3895 return true; 3896 } 3897 3898 private void updateSelectAllItem(Menu menu) { 3899 boolean canSelectAll = mTextView.canSelectAllText(); 3900 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3901 if (canSelectAll && !selectAllItemExists) { 3902 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3903 com.android.internal.R.string.selectAll) 3904 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3905 } else if (!canSelectAll && selectAllItemExists) { 3906 menu.removeItem(TextView.ID_SELECT_ALL); 3907 } 3908 } 3909 3910 private void updateReplaceItem(Menu menu) { 3911 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3912 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3913 if (canReplace && !replaceItemExists) { 3914 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3915 com.android.internal.R.string.replace) 3916 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3917 } else if (!canReplace && replaceItemExists) { 3918 menu.removeItem(TextView.ID_REPLACE); 3919 } 3920 } 3921 3922 private void updateAssistMenuItem(Menu menu) { 3923 menu.removeItem(TextView.ID_ASSIST); 3924 final TextClassification textClassification = 3925 getSelectionActionModeHelper().getTextClassification(); 3926 if (canAssist()) { 3927 menu.add(TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, 3928 textClassification.getLabel()) 3929 .setIcon(textClassification.getIcon()) 3930 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3931 mMetricsLogger.write( 3932 new LogMaker(MetricsEvent.TEXT_SELECTION_MENU_ITEM_ASSIST) 3933 .setType(MetricsEvent.TYPE_OPEN) 3934 .setSubtype(textClassification.getLogType())); 3935 } 3936 } 3937 3938 private boolean canAssist() { 3939 final TextClassification textClassification = 3940 getSelectionActionModeHelper().getTextClassification(); 3941 return mTextView.isDeviceProvisioned() 3942 && textClassification != null 3943 && (textClassification.getIcon() != null 3944 || !TextUtils.isEmpty(textClassification.getLabel())) 3945 && (textClassification.getOnClickListener() != null 3946 || (textClassification.getIntent() != null 3947 && mTextView.getContext().canStartActivityForResult())); 3948 } 3949 3950 @Override 3951 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3952 getSelectionActionModeHelper().onSelectionAction(item.getItemId()); 3953 3954 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3955 return true; 3956 } 3957 Callback customCallback = getCustomCallback(); 3958 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3959 return true; 3960 } 3961 final TextClassification textClassification = 3962 getSelectionActionModeHelper().getTextClassification(); 3963 if (TextView.ID_ASSIST == item.getItemId() && textClassification != null) { 3964 final OnClickListener onClickListener = 3965 textClassification.getOnClickListener(); 3966 if (onClickListener != null) { 3967 onClickListener.onClick(mTextView); 3968 } else { 3969 final Intent intent = textClassification.getIntent(); 3970 if (intent != null) { 3971 TextClassification.createStartActivityOnClickListener( 3972 mTextView.getContext(), intent) 3973 .onClick(mTextView); 3974 } 3975 } 3976 mMetricsLogger.action( 3977 MetricsEvent.ACTION_TEXT_SELECTION_MENU_ITEM_ASSIST, 3978 textClassification.getLogType()); 3979 stopTextActionMode(); 3980 return true; 3981 } 3982 return mTextView.onTextContextMenuItem(item.getItemId()); 3983 } 3984 3985 @Override 3986 public void onDestroyActionMode(ActionMode mode) { 3987 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3988 getSelectionActionModeHelper().onDestroyActionMode(); 3989 mTextActionMode = null; 3990 Callback customCallback = getCustomCallback(); 3991 if (customCallback != null) { 3992 customCallback.onDestroyActionMode(mode); 3993 } 3994 3995 if (!mPreserveSelection) { 3996 /* 3997 * Leave current selection when we tentatively destroy action mode for the 3998 * selection. If we're detaching from a window, we'll bring back the selection 3999 * mode when (if) we get reattached. 4000 */ 4001 Selection.setSelection((Spannable) mTextView.getText(), 4002 mTextView.getSelectionEnd()); 4003 } 4004 4005 if (mSelectionModifierCursorController != null) { 4006 mSelectionModifierCursorController.hide(); 4007 } 4008 } 4009 4010 @Override 4011 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 4012 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 4013 super.onGetContentRect(mode, view, outRect); 4014 return; 4015 } 4016 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 4017 // We have a selection. 4018 mSelectionPath.reset(); 4019 mTextView.getLayout().getSelectionPath( 4020 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 4021 mSelectionPath.computeBounds(mSelectionBounds, true); 4022 mSelectionBounds.bottom += mHandleHeight; 4023 } else { 4024 // We have a cursor. 4025 Layout layout = mTextView.getLayout(); 4026 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 4027 float primaryHorizontal = clampHorizontalPosition(null, 4028 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 4029 mSelectionBounds.set( 4030 primaryHorizontal, 4031 layout.getLineTop(line), 4032 primaryHorizontal, 4033 layout.getLineBottom(line) - layout.getLineBottom(line) + mHandleHeight); 4034 } 4035 // Take TextView's padding and scroll into account. 4036 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4037 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4038 outRect.set( 4039 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4040 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4041 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4042 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4043 } 4044 } 4045 4046 /** 4047 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4048 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4049 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4050 */ 4051 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4052 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4053 final int[] mTmpIntOffset = new int[2]; 4054 final Matrix mViewToScreenMatrix = new Matrix(); 4055 4056 @Override 4057 public void updatePosition(int parentPositionX, int parentPositionY, 4058 boolean parentPositionChanged, boolean parentScrolled) { 4059 final InputMethodState ims = mInputMethodState; 4060 if (ims == null || ims.mBatchEditNesting > 0) { 4061 return; 4062 } 4063 final InputMethodManager imm = InputMethodManager.peekInstance(); 4064 if (null == imm) { 4065 return; 4066 } 4067 if (!imm.isActive(mTextView)) { 4068 return; 4069 } 4070 // Skip if the IME has not requested the cursor/anchor position. 4071 if (!imm.isCursorAnchorInfoEnabled()) { 4072 return; 4073 } 4074 Layout layout = mTextView.getLayout(); 4075 if (layout == null) { 4076 return; 4077 } 4078 4079 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4080 builder.reset(); 4081 4082 final int selectionStart = mTextView.getSelectionStart(); 4083 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4084 4085 // Construct transformation matrix from view local coordinates to screen coordinates. 4086 mViewToScreenMatrix.set(mTextView.getMatrix()); 4087 mTextView.getLocationOnScreen(mTmpIntOffset); 4088 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4089 builder.setMatrix(mViewToScreenMatrix); 4090 4091 final float viewportToContentHorizontalOffset = 4092 mTextView.viewportToContentHorizontalOffset(); 4093 final float viewportToContentVerticalOffset = 4094 mTextView.viewportToContentVerticalOffset(); 4095 4096 final CharSequence text = mTextView.getText(); 4097 if (text instanceof Spannable) { 4098 final Spannable sp = (Spannable) text; 4099 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4100 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4101 if (composingTextEnd < composingTextStart) { 4102 final int temp = composingTextEnd; 4103 composingTextEnd = composingTextStart; 4104 composingTextStart = temp; 4105 } 4106 final boolean hasComposingText = 4107 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4108 if (hasComposingText) { 4109 final CharSequence composingText = text.subSequence(composingTextStart, 4110 composingTextEnd); 4111 builder.setComposingText(composingTextStart, composingText); 4112 mTextView.populateCharacterBounds(builder, composingTextStart, 4113 composingTextEnd, viewportToContentHorizontalOffset, 4114 viewportToContentVerticalOffset); 4115 } 4116 } 4117 4118 // Treat selectionStart as the insertion point. 4119 if (0 <= selectionStart) { 4120 final int offset = selectionStart; 4121 final int line = layout.getLineForOffset(offset); 4122 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4123 + viewportToContentHorizontalOffset; 4124 final float insertionMarkerTop = layout.getLineTop(line) 4125 + viewportToContentVerticalOffset; 4126 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4127 + viewportToContentVerticalOffset; 4128 final float insertionMarkerBottom = layout.getLineBottomWithoutSpacing(line) 4129 + viewportToContentVerticalOffset; 4130 final boolean isTopVisible = mTextView 4131 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4132 final boolean isBottomVisible = mTextView 4133 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4134 int insertionMarkerFlags = 0; 4135 if (isTopVisible || isBottomVisible) { 4136 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4137 } 4138 if (!isTopVisible || !isBottomVisible) { 4139 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4140 } 4141 if (layout.isRtlCharAt(offset)) { 4142 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4143 } 4144 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4145 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4146 } 4147 4148 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4149 } 4150 } 4151 4152 @VisibleForTesting 4153 public abstract class HandleView extends View implements TextViewPositionListener { 4154 protected Drawable mDrawable; 4155 protected Drawable mDrawableLtr; 4156 protected Drawable mDrawableRtl; 4157 private final PopupWindow mContainer; 4158 // Position with respect to the parent TextView 4159 private int mPositionX, mPositionY; 4160 private boolean mIsDragging; 4161 // Offset from touch position to mPosition 4162 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4163 protected int mHotspotX; 4164 protected int mHorizontalGravity; 4165 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4166 private float mTouchOffsetY; 4167 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4168 private float mIdealVerticalOffset; 4169 // Parent's (TextView) previous position in window 4170 private int mLastParentX, mLastParentY; 4171 // Parent's (TextView) previous position on screen 4172 private int mLastParentXOnScreen, mLastParentYOnScreen; 4173 // Previous text character offset 4174 protected int mPreviousOffset = -1; 4175 // Previous text character offset 4176 private boolean mPositionHasChanged = true; 4177 // Minimum touch target size for handles 4178 private int mMinSize; 4179 // Indicates the line of text that the handle is on. 4180 protected int mPrevLine = UNSET_LINE; 4181 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4182 // when selecting text when the handles jump to the end / start of words which may be on 4183 // a different line. 4184 protected int mPreviousLineTouched = UNSET_LINE; 4185 4186 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4187 super(mTextView.getContext()); 4188 setId(id); 4189 mContainer = new PopupWindow(mTextView.getContext(), null, 4190 com.android.internal.R.attr.textSelectHandleWindowStyle); 4191 mContainer.setSplitTouchEnabled(true); 4192 mContainer.setClippingEnabled(false); 4193 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4194 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4195 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4196 mContainer.setContentView(this); 4197 4198 mDrawableLtr = drawableLtr; 4199 mDrawableRtl = drawableRtl; 4200 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4201 com.android.internal.R.dimen.text_handle_min_size); 4202 4203 updateDrawable(); 4204 4205 final int handleHeight = getPreferredHeight(); 4206 mTouchOffsetY = -0.3f * handleHeight; 4207 mIdealVerticalOffset = 0.7f * handleHeight; 4208 } 4209 4210 public float getIdealVerticalOffset() { 4211 return mIdealVerticalOffset; 4212 } 4213 4214 protected void updateDrawable() { 4215 if (mIsDragging) { 4216 // Don't update drawable during dragging. 4217 return; 4218 } 4219 final Layout layout = mTextView.getLayout(); 4220 if (layout == null) { 4221 return; 4222 } 4223 final int offset = getCurrentCursorOffset(); 4224 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4225 final Drawable oldDrawable = mDrawable; 4226 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4227 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4228 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4229 if (oldDrawable != mDrawable && isShowing()) { 4230 // Update popup window position. 4231 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4232 - getHorizontalOffset() + getCursorOffset(); 4233 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4234 mPositionHasChanged = true; 4235 updatePosition(mLastParentX, mLastParentY, false, false); 4236 postInvalidate(); 4237 } 4238 } 4239 4240 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4241 protected abstract int getHorizontalGravity(boolean isRtlRun); 4242 4243 // Touch-up filter: number of previous positions remembered 4244 private static final int HISTORY_SIZE = 5; 4245 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4246 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4247 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4248 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4249 private int mPreviousOffsetIndex = 0; 4250 private int mNumberPreviousOffsets = 0; 4251 4252 private void startTouchUpFilter(int offset) { 4253 mNumberPreviousOffsets = 0; 4254 addPositionToTouchUpFilter(offset); 4255 } 4256 4257 private void addPositionToTouchUpFilter(int offset) { 4258 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4259 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4260 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4261 mNumberPreviousOffsets++; 4262 } 4263 4264 private void filterOnTouchUp(boolean fromTouchScreen) { 4265 final long now = SystemClock.uptimeMillis(); 4266 int i = 0; 4267 int index = mPreviousOffsetIndex; 4268 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4269 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4270 i++; 4271 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4272 } 4273 4274 if (i > 0 && i < iMax 4275 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4276 positionAtCursorOffset(mPreviousOffsets[index], false, fromTouchScreen); 4277 } 4278 } 4279 4280 public boolean offsetHasBeenChanged() { 4281 return mNumberPreviousOffsets > 1; 4282 } 4283 4284 @Override 4285 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4286 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4287 } 4288 4289 @Override 4290 public void invalidate() { 4291 super.invalidate(); 4292 if (isShowing()) { 4293 positionAtCursorOffset(getCurrentCursorOffset(), true, false); 4294 } 4295 }; 4296 4297 private int getPreferredWidth() { 4298 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4299 } 4300 4301 private int getPreferredHeight() { 4302 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4303 } 4304 4305 public void show() { 4306 if (isShowing()) return; 4307 4308 getPositionListener().addSubscriber(this, true /* local position may change */); 4309 4310 // Make sure the offset is always considered new, even when focusing at same position 4311 mPreviousOffset = -1; 4312 positionAtCursorOffset(getCurrentCursorOffset(), false, false); 4313 } 4314 4315 protected void dismiss() { 4316 mIsDragging = false; 4317 mContainer.dismiss(); 4318 onDetached(); 4319 } 4320 4321 public void hide() { 4322 dismiss(); 4323 4324 getPositionListener().removeSubscriber(this); 4325 } 4326 4327 public boolean isShowing() { 4328 return mContainer.isShowing(); 4329 } 4330 4331 private boolean isVisible() { 4332 // Always show a dragging handle. 4333 if (mIsDragging) { 4334 return true; 4335 } 4336 4337 if (mTextView.isInBatchEditMode()) { 4338 return false; 4339 } 4340 4341 return mTextView.isPositionVisible( 4342 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4343 } 4344 4345 public abstract int getCurrentCursorOffset(); 4346 4347 protected abstract void updateSelection(int offset); 4348 4349 protected abstract void updatePosition(float x, float y, boolean fromTouchScreen); 4350 4351 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4352 return layout.isRtlCharAt(offset); 4353 } 4354 4355 @VisibleForTesting 4356 public float getHorizontal(@NonNull Layout layout, int offset) { 4357 return layout.getPrimaryHorizontal(offset); 4358 } 4359 4360 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4361 return mTextView.getOffsetAtCoordinate(line, x); 4362 } 4363 4364 /** 4365 * @param offset Cursor offset. Must be in [-1, length]. 4366 * @param forceUpdatePosition whether to force update the position. This should be true 4367 * when If the parent has been scrolled, for example. 4368 * @param fromTouchScreen {@code true} if the cursor is moved with motion events from the 4369 * touch screen. 4370 */ 4371 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4372 boolean fromTouchScreen) { 4373 // A HandleView relies on the layout, which may be nulled by external methods 4374 Layout layout = mTextView.getLayout(); 4375 if (layout == null) { 4376 // Will update controllers' state, hiding them and stopping selection mode if needed 4377 prepareCursorControllers(); 4378 return; 4379 } 4380 layout = mTextView.getLayout(); 4381 4382 boolean offsetChanged = offset != mPreviousOffset; 4383 if (offsetChanged || forceUpdatePosition) { 4384 if (offsetChanged) { 4385 updateSelection(offset); 4386 if (fromTouchScreen && mHapticTextHandleEnabled) { 4387 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 4388 } 4389 addPositionToTouchUpFilter(offset); 4390 } 4391 final int line = layout.getLineForOffset(offset); 4392 mPrevLine = line; 4393 4394 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4395 - getHorizontalOffset() + getCursorOffset(); 4396 mPositionY = layout.getLineBottomWithoutSpacing(line); 4397 4398 // Take TextView's padding and scroll into account. 4399 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4400 mPositionY += mTextView.viewportToContentVerticalOffset(); 4401 4402 mPreviousOffset = offset; 4403 mPositionHasChanged = true; 4404 } 4405 } 4406 4407 /** 4408 * Return the clamped horizontal position for the cursor. 4409 * 4410 * @param layout Text layout. 4411 * @param offset Character offset for the cursor. 4412 * @return The clamped horizontal position for the cursor. 4413 */ 4414 int getCursorHorizontalPosition(Layout layout, int offset) { 4415 return (int) (getHorizontal(layout, offset) - 0.5f); 4416 } 4417 4418 @Override 4419 public void updatePosition(int parentPositionX, int parentPositionY, 4420 boolean parentPositionChanged, boolean parentScrolled) { 4421 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled, false); 4422 if (parentPositionChanged || mPositionHasChanged) { 4423 if (mIsDragging) { 4424 // Update touchToWindow offset in case of parent scrolling while dragging 4425 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4426 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4427 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4428 mLastParentX = parentPositionX; 4429 mLastParentY = parentPositionY; 4430 } 4431 4432 onHandleMoved(); 4433 } 4434 4435 if (isVisible()) { 4436 // Transform to the window coordinates to follow the view tranformation. 4437 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4438 mTextView.transformFromViewToWindowSpace(pts); 4439 pts[0] -= mHotspotX + getHorizontalOffset(); 4440 4441 if (isShowing()) { 4442 mContainer.update(pts[0], pts[1], -1, -1); 4443 } else { 4444 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4445 } 4446 } else { 4447 if (isShowing()) { 4448 dismiss(); 4449 } 4450 } 4451 4452 mPositionHasChanged = false; 4453 } 4454 } 4455 4456 @Override 4457 protected void onDraw(Canvas c) { 4458 final int drawWidth = mDrawable.getIntrinsicWidth(); 4459 final int left = getHorizontalOffset(); 4460 4461 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4462 mDrawable.draw(c); 4463 } 4464 4465 private int getHorizontalOffset() { 4466 final int width = getPreferredWidth(); 4467 final int drawWidth = mDrawable.getIntrinsicWidth(); 4468 final int left; 4469 switch (mHorizontalGravity) { 4470 case Gravity.LEFT: 4471 left = 0; 4472 break; 4473 default: 4474 case Gravity.CENTER: 4475 left = (width - drawWidth) / 2; 4476 break; 4477 case Gravity.RIGHT: 4478 left = width - drawWidth; 4479 break; 4480 } 4481 return left; 4482 } 4483 4484 protected int getCursorOffset() { 4485 return 0; 4486 } 4487 4488 @Override 4489 public boolean onTouchEvent(MotionEvent ev) { 4490 updateFloatingToolbarVisibility(ev); 4491 4492 switch (ev.getActionMasked()) { 4493 case MotionEvent.ACTION_DOWN: { 4494 startTouchUpFilter(getCurrentCursorOffset()); 4495 4496 final PositionListener positionListener = getPositionListener(); 4497 mLastParentX = positionListener.getPositionX(); 4498 mLastParentY = positionListener.getPositionY(); 4499 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4500 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4501 4502 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4503 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4504 mTouchToWindowOffsetX = xInWindow - mPositionX; 4505 mTouchToWindowOffsetY = yInWindow - mPositionY; 4506 4507 mIsDragging = true; 4508 mPreviousLineTouched = UNSET_LINE; 4509 break; 4510 } 4511 4512 case MotionEvent.ACTION_MOVE: { 4513 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4514 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4515 4516 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4517 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4518 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4519 float newVerticalOffset; 4520 if (previousVerticalOffset < mIdealVerticalOffset) { 4521 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4522 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4523 } else { 4524 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4525 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4526 } 4527 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4528 4529 final float newPosX = 4530 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4531 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4532 4533 updatePosition(newPosX, newPosY, 4534 ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4535 break; 4536 } 4537 4538 case MotionEvent.ACTION_UP: 4539 filterOnTouchUp(ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4540 mIsDragging = false; 4541 updateDrawable(); 4542 break; 4543 4544 case MotionEvent.ACTION_CANCEL: 4545 mIsDragging = false; 4546 updateDrawable(); 4547 break; 4548 } 4549 return true; 4550 } 4551 4552 public boolean isDragging() { 4553 return mIsDragging; 4554 } 4555 4556 void onHandleMoved() {} 4557 4558 public void onDetached() {} 4559 } 4560 4561 private class InsertionHandleView extends HandleView { 4562 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4563 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4564 4565 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4566 private float mDownPositionX, mDownPositionY; 4567 private Runnable mHider; 4568 4569 public InsertionHandleView(Drawable drawable) { 4570 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4571 } 4572 4573 @Override 4574 public void show() { 4575 super.show(); 4576 4577 final long durationSinceCutOrCopy = 4578 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4579 4580 // Cancel the single tap delayed runnable. 4581 if (mInsertionActionModeRunnable != null 4582 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4583 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4584 || isCursorInsideEasyCorrectionSpan())) { 4585 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4586 } 4587 4588 // Prepare and schedule the single tap runnable to run exactly after the double tap 4589 // timeout has passed. 4590 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4591 && !isCursorInsideEasyCorrectionSpan() 4592 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4593 if (mTextActionMode == null) { 4594 if (mInsertionActionModeRunnable == null) { 4595 mInsertionActionModeRunnable = new Runnable() { 4596 @Override 4597 public void run() { 4598 startInsertionActionMode(); 4599 } 4600 }; 4601 } 4602 mTextView.postDelayed( 4603 mInsertionActionModeRunnable, 4604 ViewConfiguration.getDoubleTapTimeout() + 1); 4605 } 4606 4607 } 4608 4609 hideAfterDelay(); 4610 } 4611 4612 private void hideAfterDelay() { 4613 if (mHider == null) { 4614 mHider = new Runnable() { 4615 public void run() { 4616 hide(); 4617 } 4618 }; 4619 } else { 4620 removeHiderCallback(); 4621 } 4622 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4623 } 4624 4625 private void removeHiderCallback() { 4626 if (mHider != null) { 4627 mTextView.removeCallbacks(mHider); 4628 } 4629 } 4630 4631 @Override 4632 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4633 return drawable.getIntrinsicWidth() / 2; 4634 } 4635 4636 @Override 4637 protected int getHorizontalGravity(boolean isRtlRun) { 4638 return Gravity.CENTER_HORIZONTAL; 4639 } 4640 4641 @Override 4642 protected int getCursorOffset() { 4643 int offset = super.getCursorOffset(); 4644 if (mCursorDrawable != null) { 4645 mCursorDrawable.getPadding(mTempRect); 4646 offset += (mCursorDrawable.getIntrinsicWidth() 4647 - mTempRect.left - mTempRect.right) / 2; 4648 } 4649 return offset; 4650 } 4651 4652 @Override 4653 int getCursorHorizontalPosition(Layout layout, int offset) { 4654 if (mCursorDrawable != null) { 4655 final float horizontal = getHorizontal(layout, offset); 4656 return clampHorizontalPosition(mCursorDrawable, horizontal) + mTempRect.left; 4657 } 4658 return super.getCursorHorizontalPosition(layout, offset); 4659 } 4660 4661 @Override 4662 public boolean onTouchEvent(MotionEvent ev) { 4663 final boolean result = super.onTouchEvent(ev); 4664 4665 switch (ev.getActionMasked()) { 4666 case MotionEvent.ACTION_DOWN: 4667 mDownPositionX = ev.getRawX(); 4668 mDownPositionY = ev.getRawY(); 4669 break; 4670 4671 case MotionEvent.ACTION_UP: 4672 if (!offsetHasBeenChanged()) { 4673 final float deltaX = mDownPositionX - ev.getRawX(); 4674 final float deltaY = mDownPositionY - ev.getRawY(); 4675 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4676 4677 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4678 mTextView.getContext()); 4679 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4680 4681 if (distanceSquared < touchSlop * touchSlop) { 4682 // Tapping on the handle toggles the insertion action mode. 4683 if (mTextActionMode != null) { 4684 stopTextActionMode(); 4685 } else { 4686 startInsertionActionMode(); 4687 } 4688 } 4689 } else { 4690 if (mTextActionMode != null) { 4691 mTextActionMode.invalidateContentRect(); 4692 } 4693 } 4694 hideAfterDelay(); 4695 break; 4696 4697 case MotionEvent.ACTION_CANCEL: 4698 hideAfterDelay(); 4699 break; 4700 4701 default: 4702 break; 4703 } 4704 4705 return result; 4706 } 4707 4708 @Override 4709 public int getCurrentCursorOffset() { 4710 return mTextView.getSelectionStart(); 4711 } 4712 4713 @Override 4714 public void updateSelection(int offset) { 4715 Selection.setSelection((Spannable) mTextView.getText(), offset); 4716 } 4717 4718 @Override 4719 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4720 Layout layout = mTextView.getLayout(); 4721 int offset; 4722 if (layout != null) { 4723 if (mPreviousLineTouched == UNSET_LINE) { 4724 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4725 } 4726 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4727 offset = getOffsetAtCoordinate(layout, currLine, x); 4728 mPreviousLineTouched = currLine; 4729 } else { 4730 offset = -1; 4731 } 4732 positionAtCursorOffset(offset, false, fromTouchScreen); 4733 if (mTextActionMode != null) { 4734 invalidateActionMode(); 4735 } 4736 } 4737 4738 @Override 4739 void onHandleMoved() { 4740 super.onHandleMoved(); 4741 removeHiderCallback(); 4742 } 4743 4744 @Override 4745 public void onDetached() { 4746 super.onDetached(); 4747 removeHiderCallback(); 4748 } 4749 } 4750 4751 @Retention(RetentionPolicy.SOURCE) 4752 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4753 public @interface HandleType {} 4754 public static final int HANDLE_TYPE_SELECTION_START = 0; 4755 public static final int HANDLE_TYPE_SELECTION_END = 1; 4756 4757 /** For selection handles */ 4758 @VisibleForTesting 4759 public final class SelectionHandleView extends HandleView { 4760 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4761 // end (HANDLE_TYPE_SELECTION_END). 4762 @HandleType 4763 private final int mHandleType; 4764 // Indicates whether the cursor is making adjustments within a word. 4765 private boolean mInWord = false; 4766 // Difference between touch position and word boundary position. 4767 private float mTouchWordDelta; 4768 // X value of the previous updatePosition call. 4769 private float mPrevX; 4770 // Indicates if the handle has moved a boundary between LTR and RTL text. 4771 private boolean mLanguageDirectionChanged = false; 4772 // Distance from edge of horizontally scrolling text view 4773 // to use to switch to character mode. 4774 private final float mTextViewEdgeSlop; 4775 // Used to save text view location. 4776 private final int[] mTextViewLocation = new int[2]; 4777 4778 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4779 @HandleType int handleType) { 4780 super(drawableLtr, drawableRtl, id); 4781 mHandleType = handleType; 4782 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4783 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4784 } 4785 4786 private boolean isStartHandle() { 4787 return mHandleType == HANDLE_TYPE_SELECTION_START; 4788 } 4789 4790 @Override 4791 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4792 if (isRtlRun == isStartHandle()) { 4793 return drawable.getIntrinsicWidth() / 4; 4794 } else { 4795 return (drawable.getIntrinsicWidth() * 3) / 4; 4796 } 4797 } 4798 4799 @Override 4800 protected int getHorizontalGravity(boolean isRtlRun) { 4801 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4802 } 4803 4804 @Override 4805 public int getCurrentCursorOffset() { 4806 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4807 } 4808 4809 @Override 4810 protected void updateSelection(int offset) { 4811 if (isStartHandle()) { 4812 Selection.setSelection((Spannable) mTextView.getText(), offset, 4813 mTextView.getSelectionEnd()); 4814 } else { 4815 Selection.setSelection((Spannable) mTextView.getText(), 4816 mTextView.getSelectionStart(), offset); 4817 } 4818 updateDrawable(); 4819 if (mTextActionMode != null) { 4820 invalidateActionMode(); 4821 } 4822 } 4823 4824 @Override 4825 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4826 final Layout layout = mTextView.getLayout(); 4827 if (layout == null) { 4828 // HandleView will deal appropriately in positionAtCursorOffset when 4829 // layout is null. 4830 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y), 4831 fromTouchScreen); 4832 return; 4833 } 4834 4835 if (mPreviousLineTouched == UNSET_LINE) { 4836 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4837 } 4838 4839 boolean positionCursor = false; 4840 final int anotherHandleOffset = 4841 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4842 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4843 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4844 4845 if (isStartHandle() && initialOffset >= anotherHandleOffset 4846 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4847 // Handles have crossed, bound it to the first selected line and 4848 // adjust by word / char as normal. 4849 currLine = layout.getLineForOffset(anotherHandleOffset); 4850 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4851 } 4852 4853 int offset = initialOffset; 4854 final int wordEnd = getWordEnd(offset); 4855 final int wordStart = getWordStart(offset); 4856 4857 if (mPrevX == UNSET_X_VALUE) { 4858 mPrevX = x; 4859 } 4860 4861 final int currentOffset = getCurrentCursorOffset(); 4862 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4863 final boolean atRtl = isAtRtlRun(layout, offset); 4864 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4865 4866 // We can't determine if the user is expanding or shrinking the selection if they're 4867 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4868 // the cursor at the current position. 4869 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4870 // We're on a boundary or this is the first direction change -- just update 4871 // to the current position. 4872 mLanguageDirectionChanged = true; 4873 mTouchWordDelta = 0.0f; 4874 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4875 return; 4876 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4877 // We've just moved past the boundary so update the position. After this we can 4878 // figure out if the user is expanding or shrinking to go by word or character. 4879 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4880 mTouchWordDelta = 0.0f; 4881 mLanguageDirectionChanged = false; 4882 return; 4883 } 4884 4885 boolean isExpanding; 4886 final float xDiff = x - mPrevX; 4887 if (isStartHandle()) { 4888 isExpanding = currLine < mPreviousLineTouched; 4889 } else { 4890 isExpanding = currLine > mPreviousLineTouched; 4891 } 4892 if (atRtl == isStartHandle()) { 4893 isExpanding |= xDiff > 0; 4894 } else { 4895 isExpanding |= xDiff < 0; 4896 } 4897 4898 if (mTextView.getHorizontallyScrolling()) { 4899 if (positionNearEdgeOfScrollingView(x, atRtl) 4900 && ((isStartHandle() && mTextView.getScrollX() != 0) 4901 || (!isStartHandle() 4902 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4903 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4904 || (!isStartHandle() && offset > currentOffset))) 4905 || !isExpanding)) { 4906 // If we're expanding ensure that the offset is actually expanding compared to 4907 // the current offset, if the handle snapped to the word, the finger position 4908 // may be out of sync and we don't want the selection to jump back. 4909 mTouchWordDelta = 0.0f; 4910 final int nextOffset = (atRtl == isStartHandle()) 4911 ? layout.getOffsetToRightOf(mPreviousOffset) 4912 : layout.getOffsetToLeftOf(mPreviousOffset); 4913 positionAndAdjustForCrossingHandles(nextOffset, fromTouchScreen); 4914 return; 4915 } 4916 } 4917 4918 if (isExpanding) { 4919 // User is increasing the selection. 4920 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4921 final boolean snapToWord = (!mInWord 4922 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4923 && atRtl == isAtRtlRun(layout, wordBoundary); 4924 if (snapToWord) { 4925 // Sometimes words can be broken across lines (Chinese, hyphenation). 4926 // We still snap to the word boundary but we only use the letters on the 4927 // current line to determine if the user is far enough into the word to snap. 4928 if (layout.getLineForOffset(wordBoundary) != currLine) { 4929 wordBoundary = isStartHandle() 4930 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4931 } 4932 final int offsetThresholdToSnap = isStartHandle() 4933 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4934 : wordStart + ((wordBoundary - wordStart) / 2); 4935 if (isStartHandle() 4936 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4937 // User is far enough into the word or on a different line so we expand by 4938 // word. 4939 offset = wordStart; 4940 } else 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 = wordEnd; 4945 } else { 4946 offset = mPreviousOffset; 4947 } 4948 } 4949 if ((isStartHandle() && offset < initialOffset) 4950 || (!isStartHandle() && offset > initialOffset)) { 4951 final float adjustedX = getHorizontal(layout, offset); 4952 mTouchWordDelta = 4953 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4954 } else { 4955 mTouchWordDelta = 0.0f; 4956 } 4957 positionCursor = true; 4958 } else { 4959 final int adjustedOffset = 4960 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4961 final boolean shrinking = isStartHandle() 4962 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4963 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4964 if (shrinking) { 4965 // User is shrinking the selection. 4966 if (currLine != mPrevLine) { 4967 // We're on a different line, so we'll snap to word boundaries. 4968 offset = isStartHandle() ? wordStart : wordEnd; 4969 if ((isStartHandle() && offset < initialOffset) 4970 || (!isStartHandle() && offset > initialOffset)) { 4971 final float adjustedX = getHorizontal(layout, offset); 4972 mTouchWordDelta = 4973 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4974 } else { 4975 mTouchWordDelta = 0.0f; 4976 } 4977 } else { 4978 offset = adjustedOffset; 4979 } 4980 positionCursor = true; 4981 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4982 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4983 // Handle has jumped to the word boundary, and the user is moving 4984 // their finger towards the handle, the delta should be updated. 4985 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4986 - getHorizontal(layout, mPreviousOffset); 4987 } 4988 } 4989 4990 if (positionCursor) { 4991 mPreviousLineTouched = currLine; 4992 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4993 } 4994 mPrevX = x; 4995 } 4996 4997 @Override 4998 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4999 boolean fromTouchScreen) { 5000 super.positionAtCursorOffset(offset, forceUpdatePosition, fromTouchScreen); 5001 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 5002 } 5003 5004 @Override 5005 public boolean onTouchEvent(MotionEvent event) { 5006 boolean superResult = super.onTouchEvent(event); 5007 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 5008 // Reset the touch word offset and x value when the user 5009 // re-engages the handle. 5010 mTouchWordDelta = 0.0f; 5011 mPrevX = UNSET_X_VALUE; 5012 } 5013 return superResult; 5014 } 5015 5016 private void positionAndAdjustForCrossingHandles(int offset, boolean fromTouchScreen) { 5017 final int anotherHandleOffset = 5018 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5019 if ((isStartHandle() && offset >= anotherHandleOffset) 5020 || (!isStartHandle() && offset <= anotherHandleOffset)) { 5021 mTouchWordDelta = 0.0f; 5022 final Layout layout = mTextView.getLayout(); 5023 if (layout != null && offset != anotherHandleOffset) { 5024 final float horiz = getHorizontal(layout, offset); 5025 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 5026 !isStartHandle()); 5027 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 5028 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 5029 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 5030 // This handle passes another one as it crossed a direction boundary. 5031 // Don't minimize the selection, but keep the handle at the run boundary. 5032 final int currentOffset = getCurrentCursorOffset(); 5033 final int offsetToGetRunRange = isStartHandle() 5034 ? currentOffset : Math.max(currentOffset - 1, 0); 5035 final long range = layout.getRunRange(offsetToGetRunRange); 5036 if (isStartHandle()) { 5037 offset = TextUtils.unpackRangeStartFromLong(range); 5038 } else { 5039 offset = TextUtils.unpackRangeEndFromLong(range); 5040 } 5041 positionAtCursorOffset(offset, false, fromTouchScreen); 5042 return; 5043 } 5044 } 5045 // Handles can not cross and selection is at least one character. 5046 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5047 } 5048 positionAtCursorOffset(offset, false, fromTouchScreen); 5049 } 5050 5051 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5052 mTextView.getLocationOnScreen(mTextViewLocation); 5053 boolean nearEdge; 5054 if (atRtl == isStartHandle()) { 5055 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5056 - mTextView.getPaddingRight(); 5057 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5058 } else { 5059 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5060 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5061 } 5062 return nearEdge; 5063 } 5064 5065 @Override 5066 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5067 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5068 return layout.isRtlCharAt(offsetToCheck); 5069 } 5070 5071 @Override 5072 public float getHorizontal(@NonNull Layout layout, int offset) { 5073 return getHorizontal(layout, offset, isStartHandle()); 5074 } 5075 5076 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5077 final int line = layout.getLineForOffset(offset); 5078 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5079 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5080 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5081 return (isRtlChar == isRtlParagraph) 5082 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5083 } 5084 5085 @Override 5086 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5087 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5088 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5089 if (!layout.isLevelBoundary(primaryOffset)) { 5090 return primaryOffset; 5091 } 5092 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5093 final int currentOffset = getCurrentCursorOffset(); 5094 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5095 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5096 if (primaryDiff < secondaryDiff) { 5097 return primaryOffset; 5098 } else if (primaryDiff > secondaryDiff) { 5099 return secondaryOffset; 5100 } else { 5101 final int offsetToCheck = isStartHandle() 5102 ? currentOffset : Math.max(currentOffset - 1, 0); 5103 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5104 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5105 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5106 } 5107 } 5108 } 5109 5110 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5111 final int trueLine = mTextView.getLineAtCoordinate(y); 5112 if (layout == null || prevLine > layout.getLineCount() 5113 || layout.getLineCount() <= 0 || prevLine < 0) { 5114 // Invalid parameters, just return whatever line is at y. 5115 return trueLine; 5116 } 5117 5118 if (Math.abs(trueLine - prevLine) >= 2) { 5119 // Only stick to lines if we're within a line of the previous selection. 5120 return trueLine; 5121 } 5122 5123 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5124 final int lineCount = layout.getLineCount(); 5125 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5126 5127 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5128 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5129 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5130 5131 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5132 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5133 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5134 5135 // Determine if we've moved lines based on y position and previous line. 5136 int currLine; 5137 if (y <= yTopBound) { 5138 currLine = Math.max(prevLine - 1, 0); 5139 } else if (y >= yBottomBound) { 5140 currLine = Math.min(prevLine + 1, lineCount - 1); 5141 } else { 5142 currLine = prevLine; 5143 } 5144 return currLine; 5145 } 5146 5147 /** 5148 * A CursorController instance can be used to control a cursor in the text. 5149 */ 5150 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5151 /** 5152 * Makes the cursor controller visible on screen. 5153 * See also {@link #hide()}. 5154 */ 5155 public void show(); 5156 5157 /** 5158 * Hide the cursor controller from screen. 5159 * See also {@link #show()}. 5160 */ 5161 public void hide(); 5162 5163 /** 5164 * Called when the view is detached from window. Perform house keeping task, such as 5165 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5166 * preventing the activity from being recycled. 5167 */ 5168 public void onDetached(); 5169 5170 public boolean isCursorBeingModified(); 5171 5172 public boolean isActive(); 5173 } 5174 5175 private class InsertionPointCursorController implements CursorController { 5176 private InsertionHandleView mHandle; 5177 5178 public void show() { 5179 getHandle().show(); 5180 5181 if (mSelectionModifierCursorController != null) { 5182 mSelectionModifierCursorController.hide(); 5183 } 5184 } 5185 5186 public void hide() { 5187 if (mHandle != null) { 5188 mHandle.hide(); 5189 } 5190 } 5191 5192 public void onTouchModeChanged(boolean isInTouchMode) { 5193 if (!isInTouchMode) { 5194 hide(); 5195 } 5196 } 5197 5198 private InsertionHandleView getHandle() { 5199 if (mSelectHandleCenter == null) { 5200 mSelectHandleCenter = mTextView.getContext().getDrawable( 5201 mTextView.mTextSelectHandleRes); 5202 } 5203 if (mHandle == null) { 5204 mHandle = new InsertionHandleView(mSelectHandleCenter); 5205 } 5206 return mHandle; 5207 } 5208 5209 @Override 5210 public void onDetached() { 5211 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5212 observer.removeOnTouchModeChangeListener(this); 5213 5214 if (mHandle != null) mHandle.onDetached(); 5215 } 5216 5217 @Override 5218 public boolean isCursorBeingModified() { 5219 return mHandle != null && mHandle.isDragging(); 5220 } 5221 5222 @Override 5223 public boolean isActive() { 5224 return mHandle != null && mHandle.isShowing(); 5225 } 5226 5227 public void invalidateHandle() { 5228 if (mHandle != null) { 5229 mHandle.invalidate(); 5230 } 5231 } 5232 } 5233 5234 class SelectionModifierCursorController implements CursorController { 5235 // The cursor controller handles, lazily created when shown. 5236 private SelectionHandleView mStartHandle; 5237 private SelectionHandleView mEndHandle; 5238 // The offsets of that last touch down event. Remembered to start selection there. 5239 private int mMinTouchOffset, mMaxTouchOffset; 5240 5241 private float mDownPositionX, mDownPositionY; 5242 private boolean mGestureStayedInTapRegion; 5243 5244 // Where the user first starts the drag motion. 5245 private int mStartOffset = -1; 5246 5247 private boolean mHaventMovedEnoughToStartDrag; 5248 // The line that a selection happened most recently with the drag accelerator. 5249 private int mLineSelectionIsOn = -1; 5250 // Whether the drag accelerator has selected past the initial line. 5251 private boolean mSwitchedLines = false; 5252 5253 // Indicates the drag accelerator mode that the user is currently using. 5254 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5255 // Drag accelerator is inactive. 5256 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5257 // Character based selection by dragging. Only for mouse. 5258 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5259 // Word based selection by dragging. Enabled after long pressing or double tapping. 5260 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5261 // Paragraph based selection by dragging. Enabled after mouse triple click. 5262 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5263 5264 SelectionModifierCursorController() { 5265 resetTouchOffsets(); 5266 } 5267 5268 public void show() { 5269 if (mTextView.isInBatchEditMode()) { 5270 return; 5271 } 5272 initDrawables(); 5273 initHandles(); 5274 } 5275 5276 private void initDrawables() { 5277 if (mSelectHandleLeft == null) { 5278 mSelectHandleLeft = mTextView.getContext().getDrawable( 5279 mTextView.mTextSelectHandleLeftRes); 5280 } 5281 if (mSelectHandleRight == null) { 5282 mSelectHandleRight = mTextView.getContext().getDrawable( 5283 mTextView.mTextSelectHandleRightRes); 5284 } 5285 } 5286 5287 private void initHandles() { 5288 // Lazy object creation has to be done before updatePosition() is called. 5289 if (mStartHandle == null) { 5290 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5291 com.android.internal.R.id.selection_start_handle, 5292 HANDLE_TYPE_SELECTION_START); 5293 } 5294 if (mEndHandle == null) { 5295 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5296 com.android.internal.R.id.selection_end_handle, 5297 HANDLE_TYPE_SELECTION_END); 5298 } 5299 5300 mStartHandle.show(); 5301 mEndHandle.show(); 5302 5303 hideInsertionPointCursorController(); 5304 } 5305 5306 public void hide() { 5307 if (mStartHandle != null) mStartHandle.hide(); 5308 if (mEndHandle != null) mEndHandle.hide(); 5309 } 5310 5311 public void enterDrag(int dragAcceleratorMode) { 5312 // Just need to init the handles / hide insertion cursor. 5313 show(); 5314 mDragAcceleratorMode = dragAcceleratorMode; 5315 // Start location of selection. 5316 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5317 mLastDownPositionY); 5318 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5319 // Don't show the handles until user has lifted finger. 5320 hide(); 5321 5322 // This stops scrolling parents from intercepting the touch event, allowing 5323 // the user to continue dragging across the screen to select text; TextView will 5324 // scroll as necessary. 5325 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5326 mTextView.cancelLongPress(); 5327 } 5328 5329 public void onTouchEvent(MotionEvent event) { 5330 // This is done even when the View does not have focus, so that long presses can start 5331 // selection and tap can move cursor from this tap position. 5332 final float eventX = event.getX(); 5333 final float eventY = event.getY(); 5334 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5335 switch (event.getActionMasked()) { 5336 case MotionEvent.ACTION_DOWN: 5337 if (extractedTextModeWillBeStarted()) { 5338 // Prevent duplicating the selection handles until the mode starts. 5339 hide(); 5340 } else { 5341 // Remember finger down position, to be able to start selection from there. 5342 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5343 eventX, eventY); 5344 5345 // Double tap detection 5346 if (mGestureStayedInTapRegion) { 5347 if (mTapState == TAP_STATE_DOUBLE_TAP 5348 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5349 final float deltaX = eventX - mDownPositionX; 5350 final float deltaY = eventY - mDownPositionY; 5351 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5352 5353 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5354 mTextView.getContext()); 5355 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5356 boolean stayedInArea = 5357 distanceSquared < doubleTapSlop * doubleTapSlop; 5358 5359 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5360 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5361 selectCurrentWordAndStartDrag(); 5362 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5363 selectCurrentParagraphAndStartDrag(); 5364 } 5365 mDiscardNextActionUp = true; 5366 } 5367 } 5368 } 5369 5370 mDownPositionX = eventX; 5371 mDownPositionY = eventY; 5372 mGestureStayedInTapRegion = true; 5373 mHaventMovedEnoughToStartDrag = true; 5374 } 5375 break; 5376 5377 case MotionEvent.ACTION_POINTER_DOWN: 5378 case MotionEvent.ACTION_POINTER_UP: 5379 // Handle multi-point gestures. Keep min and max offset positions. 5380 // Only activated for devices that correctly handle multi-touch. 5381 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5382 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5383 updateMinAndMaxOffsets(event); 5384 } 5385 break; 5386 5387 case MotionEvent.ACTION_MOVE: 5388 final ViewConfiguration viewConfig = ViewConfiguration.get( 5389 mTextView.getContext()); 5390 final int touchSlop = viewConfig.getScaledTouchSlop(); 5391 5392 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5393 final float deltaX = eventX - mDownPositionX; 5394 final float deltaY = eventY - mDownPositionY; 5395 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5396 5397 if (mGestureStayedInTapRegion) { 5398 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5399 mGestureStayedInTapRegion = 5400 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5401 } 5402 if (mHaventMovedEnoughToStartDrag) { 5403 // We don't start dragging until the user has moved enough. 5404 mHaventMovedEnoughToStartDrag = 5405 distanceSquared <= touchSlop * touchSlop; 5406 } 5407 } 5408 5409 if (isMouse && !isDragAcceleratorActive()) { 5410 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5411 if (mTextView.hasSelection() 5412 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5413 && offset >= mTextView.getSelectionStart() 5414 && offset <= mTextView.getSelectionEnd()) { 5415 startDragAndDrop(); 5416 break; 5417 } 5418 5419 if (mStartOffset != offset) { 5420 // Start character based drag accelerator. 5421 stopTextActionMode(); 5422 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5423 mDiscardNextActionUp = true; 5424 mHaventMovedEnoughToStartDrag = false; 5425 } 5426 } 5427 5428 if (mStartHandle != null && mStartHandle.isShowing()) { 5429 // Don't do the drag if the handles are showing already. 5430 break; 5431 } 5432 5433 updateSelection(event); 5434 break; 5435 5436 case MotionEvent.ACTION_UP: 5437 if (!isDragAcceleratorActive()) { 5438 break; 5439 } 5440 updateSelection(event); 5441 5442 // No longer dragging to select text, let the parent intercept events. 5443 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5444 5445 // No longer the first dragging motion, reset. 5446 resetDragAcceleratorState(); 5447 5448 if (mTextView.hasSelection()) { 5449 // Drag selection should not be adjusted by the text classifier. 5450 startSelectionActionModeAsync(mHaventMovedEnoughToStartDrag); 5451 } 5452 break; 5453 } 5454 } 5455 5456 private void updateSelection(MotionEvent event) { 5457 if (mTextView.getLayout() != null) { 5458 switch (mDragAcceleratorMode) { 5459 case DRAG_ACCELERATOR_MODE_CHARACTER: 5460 updateCharacterBasedSelection(event); 5461 break; 5462 case DRAG_ACCELERATOR_MODE_WORD: 5463 updateWordBasedSelection(event); 5464 break; 5465 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5466 updateParagraphBasedSelection(event); 5467 break; 5468 } 5469 } 5470 } 5471 5472 /** 5473 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5474 * 5475 * @return true if the drag was started. 5476 */ 5477 private boolean selectCurrentParagraphAndStartDrag() { 5478 if (mInsertionActionModeRunnable != null) { 5479 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5480 } 5481 stopTextActionMode(); 5482 if (!selectCurrentParagraph()) { 5483 return false; 5484 } 5485 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5486 return true; 5487 } 5488 5489 private void updateCharacterBasedSelection(MotionEvent event) { 5490 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5491 updateSelectionInternal(mStartOffset, offset, 5492 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5493 } 5494 5495 private void updateWordBasedSelection(MotionEvent event) { 5496 if (mHaventMovedEnoughToStartDrag) { 5497 return; 5498 } 5499 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5500 final ViewConfiguration viewConfig = ViewConfiguration.get( 5501 mTextView.getContext()); 5502 final float eventX = event.getX(); 5503 final float eventY = event.getY(); 5504 final int currLine; 5505 if (isMouse) { 5506 // No need to offset the y coordinate for mouse input. 5507 currLine = mTextView.getLineAtCoordinate(eventY); 5508 } else { 5509 float y = eventY; 5510 if (mSwitchedLines) { 5511 // Offset the finger by the same vertical offset as the handles. 5512 // This improves visibility of the content being selected by 5513 // shifting the finger below the content, this is applied once 5514 // the user has switched lines. 5515 final int touchSlop = viewConfig.getScaledTouchSlop(); 5516 final float fingerOffset = (mStartHandle != null) 5517 ? mStartHandle.getIdealVerticalOffset() 5518 : touchSlop; 5519 y = eventY - fingerOffset; 5520 } 5521 5522 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5523 y); 5524 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5525 // Break early here, we want to offset the finger position from 5526 // the selection highlight, once the user moved their finger 5527 // to a different line we should apply the offset and *not* switch 5528 // lines until recomputing the position with the finger offset. 5529 mSwitchedLines = true; 5530 return; 5531 } 5532 } 5533 5534 int startOffset; 5535 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5536 // Snap to word boundaries. 5537 if (mStartOffset < offset) { 5538 // Expanding with end handle. 5539 offset = getWordEnd(offset); 5540 startOffset = getWordStart(mStartOffset); 5541 } else { 5542 // Expanding with start handle. 5543 offset = getWordStart(offset); 5544 startOffset = getWordEnd(mStartOffset); 5545 if (startOffset == offset) { 5546 offset = getNextCursorOffset(offset, false); 5547 } 5548 } 5549 mLineSelectionIsOn = currLine; 5550 updateSelectionInternal(startOffset, offset, 5551 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5552 } 5553 5554 private void updateParagraphBasedSelection(MotionEvent event) { 5555 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5556 5557 final int start = Math.min(offset, mStartOffset); 5558 final int end = Math.max(offset, mStartOffset); 5559 final long paragraphsRange = getParagraphsRange(start, end); 5560 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5561 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5562 updateSelectionInternal(selectionStart, selectionEnd, 5563 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5564 } 5565 5566 private void updateSelectionInternal(int selectionStart, int selectionEnd, 5567 boolean fromTouchScreen) { 5568 final boolean performHapticFeedback = fromTouchScreen && mHapticTextHandleEnabled 5569 && ((mTextView.getSelectionStart() != selectionStart) 5570 || (mTextView.getSelectionEnd() != selectionEnd)); 5571 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5572 if (performHapticFeedback) { 5573 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 5574 } 5575 } 5576 5577 /** 5578 * @param event 5579 */ 5580 private void updateMinAndMaxOffsets(MotionEvent event) { 5581 int pointerCount = event.getPointerCount(); 5582 for (int index = 0; index < pointerCount; index++) { 5583 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5584 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5585 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5586 } 5587 } 5588 5589 public int getMinTouchOffset() { 5590 return mMinTouchOffset; 5591 } 5592 5593 public int getMaxTouchOffset() { 5594 return mMaxTouchOffset; 5595 } 5596 5597 public void resetTouchOffsets() { 5598 mMinTouchOffset = mMaxTouchOffset = -1; 5599 resetDragAcceleratorState(); 5600 } 5601 5602 private void resetDragAcceleratorState() { 5603 mStartOffset = -1; 5604 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5605 mSwitchedLines = false; 5606 final int selectionStart = mTextView.getSelectionStart(); 5607 final int selectionEnd = mTextView.getSelectionEnd(); 5608 if (selectionStart > selectionEnd) { 5609 Selection.setSelection((Spannable) mTextView.getText(), 5610 selectionEnd, selectionStart); 5611 } 5612 } 5613 5614 /** 5615 * @return true iff this controller is currently used to move the selection start. 5616 */ 5617 public boolean isSelectionStartDragged() { 5618 return mStartHandle != null && mStartHandle.isDragging(); 5619 } 5620 5621 @Override 5622 public boolean isCursorBeingModified() { 5623 return isDragAcceleratorActive() || isSelectionStartDragged() 5624 || (mEndHandle != null && mEndHandle.isDragging()); 5625 } 5626 5627 /** 5628 * @return true if the user is selecting text using the drag accelerator. 5629 */ 5630 public boolean isDragAcceleratorActive() { 5631 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5632 } 5633 5634 public void onTouchModeChanged(boolean isInTouchMode) { 5635 if (!isInTouchMode) { 5636 hide(); 5637 } 5638 } 5639 5640 @Override 5641 public void onDetached() { 5642 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5643 observer.removeOnTouchModeChangeListener(this); 5644 5645 if (mStartHandle != null) mStartHandle.onDetached(); 5646 if (mEndHandle != null) mEndHandle.onDetached(); 5647 } 5648 5649 @Override 5650 public boolean isActive() { 5651 return mStartHandle != null && mStartHandle.isShowing(); 5652 } 5653 5654 public void invalidateHandles() { 5655 if (mStartHandle != null) { 5656 mStartHandle.invalidate(); 5657 } 5658 if (mEndHandle != null) { 5659 mEndHandle.invalidate(); 5660 } 5661 } 5662 } 5663 5664 private class CorrectionHighlighter { 5665 private final Path mPath = new Path(); 5666 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5667 private int mStart, mEnd; 5668 private long mFadingStartTime; 5669 private RectF mTempRectF; 5670 private static final int FADE_OUT_DURATION = 400; 5671 5672 public CorrectionHighlighter() { 5673 mPaint.setCompatibilityScaling( 5674 mTextView.getResources().getCompatibilityInfo().applicationScale); 5675 mPaint.setStyle(Paint.Style.FILL); 5676 } 5677 5678 public void highlight(CorrectionInfo info) { 5679 mStart = info.getOffset(); 5680 mEnd = mStart + info.getNewText().length(); 5681 mFadingStartTime = SystemClock.uptimeMillis(); 5682 5683 if (mStart < 0 || mEnd < 0) { 5684 stopAnimation(); 5685 } 5686 } 5687 5688 public void draw(Canvas canvas, int cursorOffsetVertical) { 5689 if (updatePath() && updatePaint()) { 5690 if (cursorOffsetVertical != 0) { 5691 canvas.translate(0, cursorOffsetVertical); 5692 } 5693 5694 canvas.drawPath(mPath, mPaint); 5695 5696 if (cursorOffsetVertical != 0) { 5697 canvas.translate(0, -cursorOffsetVertical); 5698 } 5699 invalidate(true); // TODO invalidate cursor region only 5700 } else { 5701 stopAnimation(); 5702 invalidate(false); // TODO invalidate cursor region only 5703 } 5704 } 5705 5706 private boolean updatePaint() { 5707 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5708 if (duration > FADE_OUT_DURATION) return false; 5709 5710 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5711 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5712 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5713 + ((int) (highlightColorAlpha * coef) << 24); 5714 mPaint.setColor(color); 5715 return true; 5716 } 5717 5718 private boolean updatePath() { 5719 final Layout layout = mTextView.getLayout(); 5720 if (layout == null) return false; 5721 5722 // Update in case text is edited while the animation is run 5723 final int length = mTextView.getText().length(); 5724 int start = Math.min(length, mStart); 5725 int end = Math.min(length, mEnd); 5726 5727 mPath.reset(); 5728 layout.getSelectionPath(start, end, mPath); 5729 return true; 5730 } 5731 5732 private void invalidate(boolean delayed) { 5733 if (mTextView.getLayout() == null) return; 5734 5735 if (mTempRectF == null) mTempRectF = new RectF(); 5736 mPath.computeBounds(mTempRectF, false); 5737 5738 int left = mTextView.getCompoundPaddingLeft(); 5739 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5740 5741 if (delayed) { 5742 mTextView.postInvalidateOnAnimation( 5743 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5744 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5745 } else { 5746 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5747 (int) mTempRectF.right, (int) mTempRectF.bottom); 5748 } 5749 } 5750 5751 private void stopAnimation() { 5752 Editor.this.mCorrectionHighlighter = null; 5753 } 5754 } 5755 5756 private static class ErrorPopup extends PopupWindow { 5757 private boolean mAbove = false; 5758 private final TextView mView; 5759 private int mPopupInlineErrorBackgroundId = 0; 5760 private int mPopupInlineErrorAboveBackgroundId = 0; 5761 5762 ErrorPopup(TextView v, int width, int height) { 5763 super(v, width, height); 5764 mView = v; 5765 // Make sure the TextView has a background set as it will be used the first time it is 5766 // shown and positioned. Initialized with below background, which should have 5767 // dimensions identical to the above version for this to work (and is more likely). 5768 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5769 com.android.internal.R.styleable.Theme_errorMessageBackground); 5770 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5771 } 5772 5773 void fixDirection(boolean above) { 5774 mAbove = above; 5775 5776 if (above) { 5777 mPopupInlineErrorAboveBackgroundId = 5778 getResourceId(mPopupInlineErrorAboveBackgroundId, 5779 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5780 } else { 5781 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5782 com.android.internal.R.styleable.Theme_errorMessageBackground); 5783 } 5784 5785 mView.setBackgroundResource( 5786 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5787 } 5788 5789 private int getResourceId(int currentId, int index) { 5790 if (currentId == 0) { 5791 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5792 R.styleable.Theme); 5793 currentId = styledAttributes.getResourceId(index, 0); 5794 styledAttributes.recycle(); 5795 } 5796 return currentId; 5797 } 5798 5799 @Override 5800 public void update(int x, int y, int w, int h, boolean force) { 5801 super.update(x, y, w, h, force); 5802 5803 boolean above = isAboveAnchor(); 5804 if (above != mAbove) { 5805 fixDirection(above); 5806 } 5807 } 5808 } 5809 5810 static class InputContentType { 5811 int imeOptions = EditorInfo.IME_NULL; 5812 String privateImeOptions; 5813 CharSequence imeActionLabel; 5814 int imeActionId; 5815 Bundle extras; 5816 OnEditorActionListener onEditorActionListener; 5817 boolean enterDown; 5818 LocaleList imeHintLocales; 5819 } 5820 5821 static class InputMethodState { 5822 ExtractedTextRequest mExtractedTextRequest; 5823 final ExtractedText mExtractedText = new ExtractedText(); 5824 int mBatchEditNesting; 5825 boolean mCursorChanged; 5826 boolean mSelectionModeChanged; 5827 boolean mContentChanged; 5828 int mChangedStart, mChangedEnd, mChangedDelta; 5829 } 5830 5831 /** 5832 * @return True iff (start, end) is a valid range within the text. 5833 */ 5834 private static boolean isValidRange(CharSequence text, int start, int end) { 5835 return 0 <= start && start <= end && end <= text.length(); 5836 } 5837 5838 @VisibleForTesting 5839 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5840 return mSuggestionsPopupWindow; 5841 } 5842 5843 /** 5844 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5845 * text being typed (and hence always returns null from the filter() method). 5846 * 5847 * TODO: Make this span aware. 5848 */ 5849 public static class UndoInputFilter implements InputFilter { 5850 private final Editor mEditor; 5851 5852 // Whether the current filter pass is directly caused by an end-user text edit. 5853 private boolean mIsUserEdit; 5854 5855 // Whether the text field is handling an IME composition. Must be parceled in case the user 5856 // rotates the screen during composition. 5857 private boolean mHasComposition; 5858 5859 // Whether the user is expanding or shortening the text 5860 private boolean mExpanding; 5861 5862 // Whether the previous edit operation was in the current batch edit. 5863 private boolean mPreviousOperationWasInSameBatchEdit; 5864 5865 public UndoInputFilter(Editor editor) { 5866 mEditor = editor; 5867 } 5868 5869 public void saveInstanceState(Parcel parcel) { 5870 parcel.writeInt(mIsUserEdit ? 1 : 0); 5871 parcel.writeInt(mHasComposition ? 1 : 0); 5872 parcel.writeInt(mExpanding ? 1 : 0); 5873 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5874 } 5875 5876 public void restoreInstanceState(Parcel parcel) { 5877 mIsUserEdit = parcel.readInt() != 0; 5878 mHasComposition = parcel.readInt() != 0; 5879 mExpanding = parcel.readInt() != 0; 5880 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5881 } 5882 5883 /** 5884 * Signals that a user-triggered edit is starting. 5885 */ 5886 public void beginBatchEdit() { 5887 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5888 mIsUserEdit = true; 5889 } 5890 5891 public void endBatchEdit() { 5892 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5893 mIsUserEdit = false; 5894 mPreviousOperationWasInSameBatchEdit = false; 5895 } 5896 5897 @Override 5898 public CharSequence filter(CharSequence source, int start, int end, 5899 Spanned dest, int dstart, int dend) { 5900 if (DEBUG_UNDO) { 5901 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 5902 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5903 } 5904 5905 // Check to see if this edit should be tracked for undo. 5906 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5907 return null; 5908 } 5909 5910 final boolean hadComposition = mHasComposition; 5911 mHasComposition = isComposition(source); 5912 final boolean wasExpanding = mExpanding; 5913 boolean shouldCreateSeparateState = false; 5914 if ((end - start) != (dend - dstart)) { 5915 mExpanding = (end - start) > (dend - dstart); 5916 if (hadComposition && mExpanding != wasExpanding) { 5917 shouldCreateSeparateState = true; 5918 } 5919 } 5920 5921 // Handle edit. 5922 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5923 return null; 5924 } 5925 5926 void freezeLastEdit() { 5927 mEditor.mUndoManager.beginUpdate("Edit text"); 5928 EditOperation lastEdit = getLastEdit(); 5929 if (lastEdit != null) { 5930 lastEdit.mFrozen = true; 5931 } 5932 mEditor.mUndoManager.endUpdate(); 5933 } 5934 5935 @Retention(RetentionPolicy.SOURCE) 5936 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5937 private @interface MergeMode {} 5938 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5939 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5940 /** Use {@link EditOperation#mergeWith} to merge */ 5941 private static final int MERGE_EDIT_MODE_NORMAL = 2; 5942 5943 private void handleEdit(CharSequence source, int start, int end, 5944 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5945 // An application may install a TextWatcher to provide additional modifications after 5946 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5947 // string). This results in multiple filter() calls for what the user considers to be 5948 // a single operation. Always undo the whole set of changes in one step. 5949 @MergeMode 5950 final int mergeMode; 5951 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5952 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5953 } else if (shouldCreateSeparateState) { 5954 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5955 } else { 5956 mergeMode = MERGE_EDIT_MODE_NORMAL; 5957 } 5958 // Build a new operation with all the information from this edit. 5959 String newText = TextUtils.substring(source, start, end); 5960 String oldText = TextUtils.substring(dest, dstart, dend); 5961 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5962 mHasComposition); 5963 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5964 return; 5965 } 5966 recordEdit(edit, mergeMode); 5967 } 5968 5969 private EditOperation getLastEdit() { 5970 final UndoManager um = mEditor.mUndoManager; 5971 return um.getLastOperation( 5972 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5973 } 5974 /** 5975 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5976 * If forceMerge is true then the new edit is always merged. 5977 */ 5978 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5979 // Fetch the last edit operation and attempt to merge in the new edit. 5980 final UndoManager um = mEditor.mUndoManager; 5981 um.beginUpdate("Edit text"); 5982 EditOperation lastEdit = getLastEdit(); 5983 if (lastEdit == null) { 5984 // Add this as the first edit. 5985 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5986 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5987 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5988 // Forced merges take priority because they could be the result of a non-user-edit 5989 // change and this case should not create a new undo operation. 5990 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5991 lastEdit.forceMergeWith(edit); 5992 } else if (!mIsUserEdit) { 5993 // An application directly modified the Editable outside of a text edit. Treat this 5994 // as a new change and don't attempt to merge. 5995 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5996 um.commitState(mEditor.mUndoOwner); 5997 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5998 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 5999 // Merge succeeded, nothing else to do. 6000 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 6001 } else { 6002 // Could not merge with the last edit, so commit the last edit and add this edit. 6003 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 6004 um.commitState(mEditor.mUndoOwner); 6005 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6006 } 6007 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 6008 um.endUpdate(); 6009 } 6010 6011 private boolean canUndoEdit(CharSequence source, int start, int end, 6012 Spanned dest, int dstart, int dend) { 6013 if (!mEditor.mAllowUndo) { 6014 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 6015 return false; 6016 } 6017 6018 if (mEditor.mUndoManager.isInUndo()) { 6019 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 6020 return false; 6021 } 6022 6023 // Text filters run before input operations are applied. However, some input operations 6024 // are invalid and will throw exceptions when applied. This is common in tests. Don't 6025 // attempt to undo invalid operations. 6026 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 6027 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 6028 return false; 6029 } 6030 6031 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 6032 // on an input field. Skip no-op changes. 6033 if (start == end && dstart == dend) { 6034 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 6035 return false; 6036 } 6037 6038 return true; 6039 } 6040 6041 private static boolean isComposition(CharSequence source) { 6042 if (!(source instanceof Spannable)) { 6043 return false; 6044 } 6045 // This is a composition edit if the source has a non-zero-length composing span. 6046 Spannable text = (Spannable) source; 6047 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6048 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6049 return composeBegin < composeEnd; 6050 } 6051 6052 private boolean isInTextWatcher() { 6053 CharSequence text = mEditor.mTextView.getText(); 6054 return (text instanceof SpannableStringBuilder) 6055 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6056 } 6057 } 6058 6059 /** 6060 * An operation to undo a single "edit" to a text view. 6061 */ 6062 public static class EditOperation extends UndoOperation<Editor> { 6063 private static final int TYPE_INSERT = 0; 6064 private static final int TYPE_DELETE = 1; 6065 private static final int TYPE_REPLACE = 2; 6066 6067 private int mType; 6068 private String mOldText; 6069 private String mNewText; 6070 private int mStart; 6071 6072 private int mOldCursorPos; 6073 private int mNewCursorPos; 6074 private boolean mFrozen; 6075 private boolean mIsComposition; 6076 6077 /** 6078 * Constructs an edit operation from a text input operation on editor that replaces the 6079 * oldText starting at dstart with newText. 6080 */ 6081 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6082 boolean isComposition) { 6083 super(editor.mUndoOwner); 6084 mOldText = oldText; 6085 mNewText = newText; 6086 6087 // Determine the type of the edit. 6088 if (mNewText.length() > 0 && mOldText.length() == 0) { 6089 mType = TYPE_INSERT; 6090 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6091 mType = TYPE_DELETE; 6092 } else { 6093 mType = TYPE_REPLACE; 6094 } 6095 6096 mStart = dstart; 6097 // Store cursor data. 6098 mOldCursorPos = editor.mTextView.getSelectionStart(); 6099 mNewCursorPos = dstart + mNewText.length(); 6100 mIsComposition = isComposition; 6101 } 6102 6103 public EditOperation(Parcel src, ClassLoader loader) { 6104 super(src, loader); 6105 mType = src.readInt(); 6106 mOldText = src.readString(); 6107 mNewText = src.readString(); 6108 mStart = src.readInt(); 6109 mOldCursorPos = src.readInt(); 6110 mNewCursorPos = src.readInt(); 6111 mFrozen = src.readInt() == 1; 6112 mIsComposition = src.readInt() == 1; 6113 } 6114 6115 @Override 6116 public void writeToParcel(Parcel dest, int flags) { 6117 dest.writeInt(mType); 6118 dest.writeString(mOldText); 6119 dest.writeString(mNewText); 6120 dest.writeInt(mStart); 6121 dest.writeInt(mOldCursorPos); 6122 dest.writeInt(mNewCursorPos); 6123 dest.writeInt(mFrozen ? 1 : 0); 6124 dest.writeInt(mIsComposition ? 1 : 0); 6125 } 6126 6127 private int getNewTextEnd() { 6128 return mStart + mNewText.length(); 6129 } 6130 6131 private int getOldTextEnd() { 6132 return mStart + mOldText.length(); 6133 } 6134 6135 @Override 6136 public void commit() { 6137 } 6138 6139 @Override 6140 public void undo() { 6141 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6142 // Remove the new text and insert the old. 6143 Editor editor = getOwnerData(); 6144 Editable text = (Editable) editor.mTextView.getText(); 6145 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6146 } 6147 6148 @Override 6149 public void redo() { 6150 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6151 // Remove the old text and insert the new. 6152 Editor editor = getOwnerData(); 6153 Editable text = (Editable) editor.mTextView.getText(); 6154 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6155 } 6156 6157 /** 6158 * Attempts to merge this existing operation with a new edit. 6159 * @param edit The new edit operation. 6160 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6161 * object unchanged. 6162 */ 6163 private boolean mergeWith(EditOperation edit) { 6164 if (DEBUG_UNDO) { 6165 Log.d(TAG, "mergeWith old " + this); 6166 Log.d(TAG, "mergeWith new " + edit); 6167 } 6168 6169 if (mFrozen) { 6170 return false; 6171 } 6172 6173 switch (mType) { 6174 case TYPE_INSERT: 6175 return mergeInsertWith(edit); 6176 case TYPE_DELETE: 6177 return mergeDeleteWith(edit); 6178 case TYPE_REPLACE: 6179 return mergeReplaceWith(edit); 6180 default: 6181 return false; 6182 } 6183 } 6184 6185 private boolean mergeInsertWith(EditOperation edit) { 6186 if (edit.mType == TYPE_INSERT) { 6187 // Merge insertions that are contiguous even when it's frozen. 6188 if (getNewTextEnd() != edit.mStart) { 6189 return false; 6190 } 6191 mNewText += edit.mNewText; 6192 mNewCursorPos = edit.mNewCursorPos; 6193 mFrozen = edit.mFrozen; 6194 mIsComposition = edit.mIsComposition; 6195 return true; 6196 } 6197 if (mIsComposition && edit.mType == TYPE_REPLACE 6198 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6199 // Merge insertion with replace as they can be single insertion. 6200 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6201 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6202 mNewCursorPos = edit.mNewCursorPos; 6203 mIsComposition = edit.mIsComposition; 6204 return true; 6205 } 6206 return false; 6207 } 6208 6209 // TODO: Support forward delete. 6210 private boolean mergeDeleteWith(EditOperation edit) { 6211 // Only merge continuous deletes. 6212 if (edit.mType != TYPE_DELETE) { 6213 return false; 6214 } 6215 // Only merge deletions that are contiguous. 6216 if (mStart != edit.getOldTextEnd()) { 6217 return false; 6218 } 6219 mStart = edit.mStart; 6220 mOldText = edit.mOldText + mOldText; 6221 mNewCursorPos = edit.mNewCursorPos; 6222 mIsComposition = edit.mIsComposition; 6223 return true; 6224 } 6225 6226 private boolean mergeReplaceWith(EditOperation edit) { 6227 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6228 // Merge with adjacent insert. 6229 mNewText += edit.mNewText; 6230 mNewCursorPos = edit.mNewCursorPos; 6231 return true; 6232 } 6233 if (!mIsComposition) { 6234 return false; 6235 } 6236 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6237 && getNewTextEnd() >= edit.getOldTextEnd()) { 6238 // Merge with delete as they can be single operation. 6239 mNewText = mNewText.substring(0, edit.mStart - mStart) 6240 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6241 if (mNewText.isEmpty()) { 6242 mType = TYPE_DELETE; 6243 } 6244 mNewCursorPos = edit.mNewCursorPos; 6245 mIsComposition = edit.mIsComposition; 6246 return true; 6247 } 6248 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6249 && TextUtils.equals(mNewText, edit.mOldText)) { 6250 // Merge with the replace that replaces the same region. 6251 mNewText = edit.mNewText; 6252 mNewCursorPos = edit.mNewCursorPos; 6253 mIsComposition = edit.mIsComposition; 6254 return true; 6255 } 6256 return false; 6257 } 6258 6259 /** 6260 * Forcibly creates a single merged edit operation by simulating the entire text 6261 * contents being replaced. 6262 */ 6263 public void forceMergeWith(EditOperation edit) { 6264 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6265 if (mergeWith(edit)) { 6266 return; 6267 } 6268 Editor editor = getOwnerData(); 6269 6270 // Copy the text of the current field. 6271 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6272 // but would require two parallel implementations of modifyText() because Editable and 6273 // StringBuilder do not share an interface for replace/delete/insert. 6274 Editable editable = (Editable) editor.mTextView.getText(); 6275 Editable originalText = new SpannableStringBuilder(editable.toString()); 6276 6277 // Roll back the last operation. 6278 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6279 6280 // Clone the text again and apply the new operation. 6281 Editable finalText = new SpannableStringBuilder(editable.toString()); 6282 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6283 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6284 6285 // Convert this operation into a replace operation. 6286 mType = TYPE_REPLACE; 6287 mNewText = finalText.toString(); 6288 mOldText = originalText.toString(); 6289 mStart = 0; 6290 mNewCursorPos = edit.mNewCursorPos; 6291 mIsComposition = edit.mIsComposition; 6292 // mOldCursorPos is unchanged. 6293 } 6294 6295 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6296 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6297 // Apply the edit if it is still valid. 6298 if (isValidRange(text, deleteFrom, deleteTo) 6299 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6300 if (deleteFrom != deleteTo) { 6301 text.delete(deleteFrom, deleteTo); 6302 } 6303 if (newText.length() != 0) { 6304 text.insert(newTextInsertAt, newText); 6305 } 6306 } 6307 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6308 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6309 // TODO: Select all the text that was undone. 6310 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6311 Selection.setSelection(text, newCursorPos); 6312 } 6313 } 6314 6315 private String getTypeString() { 6316 switch (mType) { 6317 case TYPE_INSERT: 6318 return "insert"; 6319 case TYPE_DELETE: 6320 return "delete"; 6321 case TYPE_REPLACE: 6322 return "replace"; 6323 default: 6324 return ""; 6325 } 6326 } 6327 6328 @Override 6329 public String toString() { 6330 return "[mType=" + getTypeString() + ", " 6331 + "mOldText=" + mOldText + ", " 6332 + "mNewText=" + mNewText + ", " 6333 + "mStart=" + mStart + ", " 6334 + "mOldCursorPos=" + mOldCursorPos + ", " 6335 + "mNewCursorPos=" + mNewCursorPos + ", " 6336 + "mFrozen=" + mFrozen + ", " 6337 + "mIsComposition=" + mIsComposition + "]"; 6338 } 6339 6340 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6341 new Parcelable.ClassLoaderCreator<EditOperation>() { 6342 @Override 6343 public EditOperation createFromParcel(Parcel in) { 6344 return new EditOperation(in, null); 6345 } 6346 6347 @Override 6348 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6349 return new EditOperation(in, loader); 6350 } 6351 6352 @Override 6353 public EditOperation[] newArray(int size) { 6354 return new EditOperation[size]; 6355 } 6356 }; 6357 } 6358 6359 /** 6360 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6361 * These allow external applications to plug into currently selected text. 6362 */ 6363 static final class ProcessTextIntentActionsHandler { 6364 6365 private final Editor mEditor; 6366 private final TextView mTextView; 6367 private final Context mContext; 6368 private final PackageManager mPackageManager; 6369 private final String mPackageName; 6370 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6371 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6372 new SparseArray<>(); 6373 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6374 6375 private ProcessTextIntentActionsHandler(Editor editor) { 6376 mEditor = Preconditions.checkNotNull(editor); 6377 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6378 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6379 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6380 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6381 } 6382 6383 /** 6384 * Adds "PROCESS_TEXT" menu items to the specified menu. 6385 */ 6386 public void onInitializeMenu(Menu menu) { 6387 final int size = mSupportedActivities.size(); 6388 loadSupportedActivities(); 6389 for (int i = 0; i < size; i++) { 6390 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6391 menu.add(Menu.NONE, Menu.NONE, 6392 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6393 getLabel(resolveInfo)) 6394 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6395 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6396 } 6397 } 6398 6399 /** 6400 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6401 * menu item. 6402 * 6403 * @return True if the action was performed, false otherwise. 6404 */ 6405 public boolean performMenuItemAction(MenuItem item) { 6406 return fireIntent(item.getIntent()); 6407 } 6408 6409 /** 6410 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6411 */ 6412 public void initializeAccessibilityActions() { 6413 mAccessibilityIntents.clear(); 6414 mAccessibilityActions.clear(); 6415 int i = 0; 6416 loadSupportedActivities(); 6417 for (ResolveInfo resolveInfo : mSupportedActivities) { 6418 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6419 mAccessibilityActions.put( 6420 actionId, 6421 new AccessibilityNodeInfo.AccessibilityAction( 6422 actionId, getLabel(resolveInfo))); 6423 mAccessibilityIntents.put( 6424 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6425 } 6426 } 6427 6428 /** 6429 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6430 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6431 * latest accessibility actions available for this call. 6432 */ 6433 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6434 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6435 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6436 } 6437 } 6438 6439 /** 6440 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6441 * accessibility action id. 6442 * 6443 * @return True if the action was performed, false otherwise. 6444 */ 6445 public boolean performAccessibilityAction(int actionId) { 6446 return fireIntent(mAccessibilityIntents.get(actionId)); 6447 } 6448 6449 private boolean fireIntent(Intent intent) { 6450 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6451 String selectedText = mTextView.getSelectedText(); 6452 selectedText = TextUtils.trimToParcelableSize(selectedText); 6453 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, selectedText); 6454 mEditor.mPreserveSelection = true; 6455 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6456 return true; 6457 } 6458 return false; 6459 } 6460 6461 private void loadSupportedActivities() { 6462 mSupportedActivities.clear(); 6463 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6464 List<ResolveInfo> unfiltered = 6465 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6466 for (ResolveInfo info : unfiltered) { 6467 if (isSupportedActivity(info)) { 6468 mSupportedActivities.add(info); 6469 } 6470 } 6471 } 6472 6473 private boolean isSupportedActivity(ResolveInfo info) { 6474 return mPackageName.equals(info.activityInfo.packageName) 6475 || info.activityInfo.exported 6476 && (info.activityInfo.permission == null 6477 || mContext.checkSelfPermission(info.activityInfo.permission) 6478 == PackageManager.PERMISSION_GRANTED); 6479 } 6480 6481 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6482 return createProcessTextIntent() 6483 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6484 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6485 } 6486 6487 private Intent createProcessTextIntent() { 6488 return new Intent() 6489 .setAction(Intent.ACTION_PROCESS_TEXT) 6490 .setType("text/plain"); 6491 } 6492 6493 private CharSequence getLabel(ResolveInfo resolveInfo) { 6494 return resolveInfo.loadLabel(mPackageManager); 6495 } 6496 } 6497} 6498