Editor.java revision e0b57893c68a685d287664df28467694a39e4432
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.InputDevice; 87import android.view.LayoutInflater; 88import android.view.Menu; 89import android.view.MenuItem; 90import android.view.MotionEvent; 91import android.view.RenderNode; 92import android.view.SubMenu; 93import android.view.View; 94import android.view.View.DragShadowBuilder; 95import android.view.View.OnClickListener; 96import android.view.ViewConfiguration; 97import android.view.ViewGroup; 98import android.view.ViewGroup.LayoutParams; 99import android.view.ViewTreeObserver; 100import android.view.WindowManager; 101import android.view.accessibility.AccessibilityNodeInfo; 102import android.view.inputmethod.CorrectionInfo; 103import android.view.inputmethod.CursorAnchorInfo; 104import android.view.inputmethod.EditorInfo; 105import android.view.inputmethod.ExtractedText; 106import android.view.inputmethod.ExtractedTextRequest; 107import android.view.inputmethod.InputConnection; 108import android.view.inputmethod.InputMethodManager; 109import android.view.textclassifier.TextClassification; 110import android.widget.AdapterView.OnItemClickListener; 111import android.widget.TextView.Drawables; 112import android.widget.TextView.OnEditorActionListener; 113 114import com.android.internal.annotations.VisibleForTesting; 115import com.android.internal.logging.MetricsLogger; 116import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 117import com.android.internal.util.ArrayUtils; 118import com.android.internal.util.GrowingArrayUtils; 119import com.android.internal.util.Preconditions; 120import com.android.internal.widget.EditableInputConnection; 121 122import java.lang.annotation.Retention; 123import java.lang.annotation.RetentionPolicy; 124import java.text.BreakIterator; 125import java.util.ArrayList; 126import java.util.Arrays; 127import java.util.Comparator; 128import java.util.HashMap; 129import java.util.List; 130 131 132/** 133 * Helper class used by TextView to handle editable text views. 134 * 135 * @hide 136 */ 137public class Editor { 138 private static final String TAG = "Editor"; 139 private static final boolean DEBUG_UNDO = false; 140 141 static final int BLINK = 500; 142 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 143 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 144 private static final int UNSET_X_VALUE = -1; 145 private static final int UNSET_LINE = -1; 146 // Tag used when the Editor maintains its own separate UndoManager. 147 private static final String UNDO_OWNER_TAG = "Editor"; 148 149 // Ordering constants used to place the Action Mode or context menu items in their menu. 150 private static final int MENU_ITEM_ORDER_ASSIST = 0; 151 private static final int MENU_ITEM_ORDER_UNDO = 2; 152 private static final int MENU_ITEM_ORDER_REDO = 3; 153 private static final int MENU_ITEM_ORDER_CUT = 4; 154 private static final int MENU_ITEM_ORDER_COPY = 5; 155 private static final int MENU_ITEM_ORDER_PASTE = 6; 156 private static final int MENU_ITEM_ORDER_SHARE = 7; 157 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 8; 158 private static final int MENU_ITEM_ORDER_SELECT_ALL = 9; 159 private static final int MENU_ITEM_ORDER_REPLACE = 10; 160 private static final int MENU_ITEM_ORDER_AUTOFILL = 11; 161 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 162 163 // Each Editor manages its own undo stack. 164 private final UndoManager mUndoManager = new UndoManager(); 165 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 166 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 167 boolean mAllowUndo = true; 168 169 private final MetricsLogger mMetricsLogger = new MetricsLogger(); 170 171 // Cursor Controllers. 172 private InsertionPointCursorController mInsertionPointCursorController; 173 SelectionModifierCursorController mSelectionModifierCursorController; 174 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 175 private ActionMode mTextActionMode; 176 private boolean mInsertionControllerEnabled; 177 private boolean mSelectionControllerEnabled; 178 179 // Used to highlight a word when it is corrected by the IME 180 private CorrectionHighlighter mCorrectionHighlighter; 181 182 InputContentType mInputContentType; 183 InputMethodState mInputMethodState; 184 185 private static class TextRenderNode { 186 // Render node has 3 recording states: 187 // 1. Recorded operations are valid. 188 // #needsRecord() returns false, but needsToBeShifted is false. 189 // 2. Recorded operations are not valid, but just the position needed to be updated. 190 // #needsRecord() returns false, but needsToBeShifted is true. 191 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 192 // true. 193 RenderNode renderNode; 194 boolean isDirty; 195 // Becomes true when recorded operations can be reused, but the position has to be updated. 196 boolean needsToBeShifted; 197 public TextRenderNode(String name) { 198 renderNode = RenderNode.create(name, null); 199 isDirty = true; 200 needsToBeShifted = true; 201 } 202 boolean needsRecord() { 203 return isDirty || !renderNode.isValid(); 204 } 205 } 206 private TextRenderNode[] mTextRenderNodes; 207 208 boolean mFrozenWithFocus; 209 boolean mSelectionMoved; 210 boolean mTouchFocusSelected; 211 212 KeyListener mKeyListener; 213 int mInputType = EditorInfo.TYPE_NULL; 214 215 boolean mDiscardNextActionUp; 216 boolean mIgnoreActionUpEvent; 217 218 long mShowCursor; 219 private Blink mBlink; 220 221 boolean mCursorVisible = true; 222 boolean mSelectAllOnFocus; 223 boolean mTextIsSelectable; 224 225 CharSequence mError; 226 boolean mErrorWasChanged; 227 private ErrorPopup mErrorPopup; 228 229 /** 230 * This flag is set if the TextView tries to display an error before it 231 * is attached to the window (so its position is still unknown). 232 * It causes the error to be shown later, when onAttachedToWindow() 233 * is called. 234 */ 235 private boolean mShowErrorAfterAttach; 236 237 boolean mInBatchEditControllers; 238 boolean mShowSoftInputOnFocus = true; 239 private boolean mPreserveSelection; 240 private boolean mRestartActionModeOnNextRefresh; 241 242 private SelectionActionModeHelper mSelectionActionModeHelper; 243 244 boolean mIsBeingLongClicked; 245 246 private SuggestionsPopupWindow mSuggestionsPopupWindow; 247 SuggestionRangeSpan mSuggestionRangeSpan; 248 private Runnable mShowSuggestionRunnable; 249 250 final Drawable[] mCursorDrawable = new Drawable[2]; 251 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 252 253 private Drawable mSelectHandleLeft; 254 private Drawable mSelectHandleRight; 255 private Drawable mSelectHandleCenter; 256 257 // Global listener that detects changes in the global position of the TextView 258 private PositionListener mPositionListener; 259 260 private float mLastDownPositionX, mLastDownPositionY; 261 private float mContextMenuAnchorX, mContextMenuAnchorY; 262 Callback mCustomSelectionActionModeCallback; 263 Callback mCustomInsertionActionModeCallback; 264 265 // Set when this TextView gained focus with some text selected. Will start selection mode. 266 boolean mCreatedWithASelection; 267 268 // Indicates the current tap state (first tap, double tap, or triple click). 269 private int mTapState = TAP_STATE_INITIAL; 270 private long mLastTouchUpTime = 0; 271 private static final int TAP_STATE_INITIAL = 0; 272 private static final int TAP_STATE_FIRST_TAP = 1; 273 private static final int TAP_STATE_DOUBLE_TAP = 2; 274 // Only for mouse input. 275 private static final int TAP_STATE_TRIPLE_CLICK = 3; 276 277 // The button state as of the last time #onTouchEvent is called. 278 private int mLastButtonState; 279 280 private Runnable mInsertionActionModeRunnable; 281 282 // The span controller helps monitoring the changes to which the Editor needs to react: 283 // - EasyEditSpans, for which we have some UI to display on attach and on hide 284 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 285 private SpanController mSpanController; 286 287 private WordIterator mWordIterator; 288 SpellChecker mSpellChecker; 289 290 // This word iterator is set with text and used to determine word boundaries 291 // when a user is selecting text. 292 private WordIterator mWordIteratorWithText; 293 // Indicate that the text in the word iterator needs to be updated. 294 private boolean mUpdateWordIteratorText; 295 296 private Rect mTempRect; 297 298 private final TextView mTextView; 299 300 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 301 302 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 303 new CursorAnchorInfoNotifier(); 304 305 private final Runnable mShowFloatingToolbar = new Runnable() { 306 @Override 307 public void run() { 308 if (mTextActionMode != null) { 309 mTextActionMode.hide(0); // hide off. 310 } 311 } 312 }; 313 314 boolean mIsInsertionActionModeStartPending = false; 315 316 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 317 318 Editor(TextView textView) { 319 mTextView = textView; 320 // Synchronize the filter list, which places the undo input filter at the end. 321 mTextView.setFilters(mTextView.getFilters()); 322 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 323 } 324 325 ParcelableParcel saveInstanceState() { 326 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 327 Parcel parcel = state.getParcel(); 328 mUndoManager.saveInstanceState(parcel); 329 mUndoInputFilter.saveInstanceState(parcel); 330 return state; 331 } 332 333 void restoreInstanceState(ParcelableParcel state) { 334 Parcel parcel = state.getParcel(); 335 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 336 mUndoInputFilter.restoreInstanceState(parcel); 337 // Re-associate this object as the owner of undo state. 338 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 339 } 340 341 /** 342 * Forgets all undo and redo operations for this Editor. 343 */ 344 void forgetUndoRedo() { 345 UndoOwner[] owners = { mUndoOwner }; 346 mUndoManager.forgetUndos(owners, -1 /* all */); 347 mUndoManager.forgetRedos(owners, -1 /* all */); 348 } 349 350 boolean canUndo() { 351 UndoOwner[] owners = { mUndoOwner }; 352 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 353 } 354 355 boolean canRedo() { 356 UndoOwner[] owners = { mUndoOwner }; 357 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 358 } 359 360 void undo() { 361 if (!mAllowUndo) { 362 return; 363 } 364 UndoOwner[] owners = { mUndoOwner }; 365 mUndoManager.undo(owners, 1); // Undo 1 action. 366 } 367 368 void redo() { 369 if (!mAllowUndo) { 370 return; 371 } 372 UndoOwner[] owners = { mUndoOwner }; 373 mUndoManager.redo(owners, 1); // Redo 1 action. 374 } 375 376 void replace() { 377 if (mSuggestionsPopupWindow == null) { 378 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 379 } 380 hideCursorAndSpanControllers(); 381 mSuggestionsPopupWindow.show(); 382 383 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 384 Selection.setSelection((Spannable) mTextView.getText(), middle); 385 } 386 387 void onAttachedToWindow() { 388 if (mShowErrorAfterAttach) { 389 showError(); 390 mShowErrorAfterAttach = false; 391 } 392 393 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 394 // No need to create the controller. 395 // The get method will add the listener on controller creation. 396 if (mInsertionPointCursorController != null) { 397 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 398 } 399 if (mSelectionModifierCursorController != null) { 400 mSelectionModifierCursorController.resetTouchOffsets(); 401 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 402 } 403 updateSpellCheckSpans(0, mTextView.getText().length(), 404 true /* create the spell checker if needed */); 405 406 if (mTextView.hasSelection()) { 407 refreshTextActionMode(); 408 } 409 410 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 411 resumeBlink(); 412 } 413 414 void onDetachedFromWindow() { 415 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 416 417 if (mError != null) { 418 hideError(); 419 } 420 421 suspendBlink(); 422 423 if (mInsertionPointCursorController != null) { 424 mInsertionPointCursorController.onDetached(); 425 } 426 427 if (mSelectionModifierCursorController != null) { 428 mSelectionModifierCursorController.onDetached(); 429 } 430 431 if (mShowSuggestionRunnable != null) { 432 mTextView.removeCallbacks(mShowSuggestionRunnable); 433 } 434 435 // Cancel the single tap delayed runnable. 436 if (mInsertionActionModeRunnable != null) { 437 mTextView.removeCallbacks(mInsertionActionModeRunnable); 438 } 439 440 mTextView.removeCallbacks(mShowFloatingToolbar); 441 442 discardTextDisplayLists(); 443 444 if (mSpellChecker != null) { 445 mSpellChecker.closeSession(); 446 // Forces the creation of a new SpellChecker next time this window is created. 447 // Will handle the cases where the settings has been changed in the meantime. 448 mSpellChecker = null; 449 } 450 451 hideCursorAndSpanControllers(); 452 stopTextActionModeWithPreservingSelection(); 453 } 454 455 private void discardTextDisplayLists() { 456 if (mTextRenderNodes != null) { 457 for (int i = 0; i < mTextRenderNodes.length; i++) { 458 RenderNode displayList = mTextRenderNodes[i] != null 459 ? mTextRenderNodes[i].renderNode : null; 460 if (displayList != null && displayList.isValid()) { 461 displayList.discardDisplayList(); 462 } 463 } 464 } 465 } 466 467 private void showError() { 468 if (mTextView.getWindowToken() == null) { 469 mShowErrorAfterAttach = true; 470 return; 471 } 472 473 if (mErrorPopup == null) { 474 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 475 final TextView err = (TextView) inflater.inflate( 476 com.android.internal.R.layout.textview_hint, null); 477 478 final float scale = mTextView.getResources().getDisplayMetrics().density; 479 mErrorPopup = 480 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 481 mErrorPopup.setFocusable(false); 482 // The user is entering text, so the input method is needed. We 483 // don't want the popup to be displayed on top of it. 484 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 485 } 486 487 TextView tv = (TextView) mErrorPopup.getContentView(); 488 chooseSize(mErrorPopup, mError, tv); 489 tv.setText(mError); 490 491 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 492 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 493 } 494 495 public void setError(CharSequence error, Drawable icon) { 496 mError = TextUtils.stringOrSpannedString(error); 497 mErrorWasChanged = true; 498 499 if (mError == null) { 500 setErrorIcon(null); 501 if (mErrorPopup != null) { 502 if (mErrorPopup.isShowing()) { 503 mErrorPopup.dismiss(); 504 } 505 506 mErrorPopup = null; 507 } 508 mShowErrorAfterAttach = false; 509 } else { 510 setErrorIcon(icon); 511 if (mTextView.isFocused()) { 512 showError(); 513 } 514 } 515 } 516 517 private void setErrorIcon(Drawable icon) { 518 Drawables dr = mTextView.mDrawables; 519 if (dr == null) { 520 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 521 } 522 dr.setErrorDrawable(icon, mTextView); 523 524 mTextView.resetResolvedDrawables(); 525 mTextView.invalidate(); 526 mTextView.requestLayout(); 527 } 528 529 private void hideError() { 530 if (mErrorPopup != null) { 531 if (mErrorPopup.isShowing()) { 532 mErrorPopup.dismiss(); 533 } 534 } 535 536 mShowErrorAfterAttach = false; 537 } 538 539 /** 540 * Returns the X offset to make the pointy top of the error point 541 * at the middle of the error icon. 542 */ 543 private int getErrorX() { 544 /* 545 * The "25" is the distance between the point and the right edge 546 * of the background 547 */ 548 final float scale = mTextView.getResources().getDisplayMetrics().density; 549 550 final Drawables dr = mTextView.mDrawables; 551 552 final int layoutDirection = mTextView.getLayoutDirection(); 553 int errorX; 554 int offset; 555 switch (layoutDirection) { 556 default: 557 case View.LAYOUT_DIRECTION_LTR: 558 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 559 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 560 - mTextView.getPaddingRight() + offset; 561 break; 562 case View.LAYOUT_DIRECTION_RTL: 563 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 564 errorX = mTextView.getPaddingLeft() + offset; 565 break; 566 } 567 return errorX; 568 } 569 570 /** 571 * Returns the Y offset to make the pointy top of the error point 572 * at the bottom of the error icon. 573 */ 574 private int getErrorY() { 575 /* 576 * Compound, not extended, because the icon is not clipped 577 * if the text height is smaller. 578 */ 579 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 580 int vspace = mTextView.getBottom() - mTextView.getTop() 581 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 582 583 final Drawables dr = mTextView.mDrawables; 584 585 final int layoutDirection = mTextView.getLayoutDirection(); 586 int height; 587 switch (layoutDirection) { 588 default: 589 case View.LAYOUT_DIRECTION_LTR: 590 height = (dr != null ? dr.mDrawableHeightRight : 0); 591 break; 592 case View.LAYOUT_DIRECTION_RTL: 593 height = (dr != null ? dr.mDrawableHeightLeft : 0); 594 break; 595 } 596 597 int icontop = compoundPaddingTop + (vspace - height) / 2; 598 599 /* 600 * The "2" is the distance between the point and the top edge 601 * of the background. 602 */ 603 final float scale = mTextView.getResources().getDisplayMetrics().density; 604 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 605 } 606 607 void createInputContentTypeIfNeeded() { 608 if (mInputContentType == null) { 609 mInputContentType = new InputContentType(); 610 } 611 } 612 613 void createInputMethodStateIfNeeded() { 614 if (mInputMethodState == null) { 615 mInputMethodState = new InputMethodState(); 616 } 617 } 618 619 boolean isCursorVisible() { 620 // The default value is true, even when there is no associated Editor 621 return mCursorVisible && mTextView.isTextEditable(); 622 } 623 624 void prepareCursorControllers() { 625 boolean windowSupportsHandles = false; 626 627 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 628 if (params instanceof WindowManager.LayoutParams) { 629 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 630 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 631 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 632 } 633 634 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 635 mInsertionControllerEnabled = enabled && isCursorVisible(); 636 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 637 638 if (!mInsertionControllerEnabled) { 639 hideInsertionPointCursorController(); 640 if (mInsertionPointCursorController != null) { 641 mInsertionPointCursorController.onDetached(); 642 mInsertionPointCursorController = null; 643 } 644 } 645 646 if (!mSelectionControllerEnabled) { 647 stopTextActionMode(); 648 if (mSelectionModifierCursorController != null) { 649 mSelectionModifierCursorController.onDetached(); 650 mSelectionModifierCursorController = null; 651 } 652 } 653 } 654 655 void hideInsertionPointCursorController() { 656 if (mInsertionPointCursorController != null) { 657 mInsertionPointCursorController.hide(); 658 } 659 } 660 661 /** 662 * Hides the insertion and span controllers. 663 */ 664 void hideCursorAndSpanControllers() { 665 hideCursorControllers(); 666 hideSpanControllers(); 667 } 668 669 private void hideSpanControllers() { 670 if (mSpanController != null) { 671 mSpanController.hide(); 672 } 673 } 674 675 private void hideCursorControllers() { 676 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 677 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 678 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 679 // to distinguish one from the other. 680 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 681 || !mSuggestionsPopupWindow.isShowingUp())) { 682 // Should be done before hide insertion point controller since it triggers a show of it 683 mSuggestionsPopupWindow.hide(); 684 } 685 hideInsertionPointCursorController(); 686 } 687 688 /** 689 * Create new SpellCheckSpans on the modified region. 690 */ 691 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 692 // Remove spans whose adjacent characters are text not punctuation 693 mTextView.removeAdjacentSuggestionSpans(start); 694 mTextView.removeAdjacentSuggestionSpans(end); 695 696 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 697 && !(mTextView.isInExtractedMode())) { 698 if (mSpellChecker == null && createSpellChecker) { 699 mSpellChecker = new SpellChecker(mTextView); 700 } 701 if (mSpellChecker != null) { 702 mSpellChecker.spellCheck(start, end); 703 } 704 } 705 } 706 707 void onScreenStateChanged(int screenState) { 708 switch (screenState) { 709 case View.SCREEN_STATE_ON: 710 resumeBlink(); 711 break; 712 case View.SCREEN_STATE_OFF: 713 suspendBlink(); 714 break; 715 } 716 } 717 718 private void suspendBlink() { 719 if (mBlink != null) { 720 mBlink.cancel(); 721 } 722 } 723 724 private void resumeBlink() { 725 if (mBlink != null) { 726 mBlink.uncancel(); 727 makeBlink(); 728 } 729 } 730 731 void adjustInputType(boolean password, boolean passwordInputType, 732 boolean webPasswordInputType, boolean numberPasswordInputType) { 733 // mInputType has been set from inputType, possibly modified by mInputMethod. 734 // Specialize mInputType to [web]password if we have a text class and the original input 735 // type was a password. 736 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 737 if (password || passwordInputType) { 738 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 739 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 740 } 741 if (webPasswordInputType) { 742 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 743 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 744 } 745 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 746 if (numberPasswordInputType) { 747 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 748 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 749 } 750 } 751 } 752 753 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 754 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 755 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 756 757 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 758 com.android.internal.R.dimen.textview_error_popup_default_width); 759 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 760 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 761 float max = 0; 762 for (int i = 0; i < l.getLineCount(); i++) { 763 max = Math.max(max, l.getLineWidth(i)); 764 } 765 766 /* 767 * Now set the popup size to be big enough for the text plus the border capped 768 * to DEFAULT_MAX_POPUP_WIDTH 769 */ 770 pop.setWidth(wid + (int) Math.ceil(max)); 771 pop.setHeight(ht + l.getHeight()); 772 } 773 774 void setFrame() { 775 if (mErrorPopup != null) { 776 TextView tv = (TextView) mErrorPopup.getContentView(); 777 chooseSize(mErrorPopup, mError, tv); 778 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 779 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 780 } 781 } 782 783 private int getWordStart(int offset) { 784 // FIXME - For this and similar methods we're not doing anything to check if there's 785 // a LocaleSpan in the text, this may be something we should try handling or checking for. 786 int retOffset = getWordIteratorWithText().prevBoundary(offset); 787 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 788 // On punctuation boundary or within group of punctuation, find punctuation start. 789 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 790 } else { 791 // Not on a punctuation boundary, find the word start. 792 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 793 } 794 if (retOffset == BreakIterator.DONE) { 795 return offset; 796 } 797 return retOffset; 798 } 799 800 private int getWordEnd(int offset) { 801 int retOffset = getWordIteratorWithText().nextBoundary(offset); 802 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 803 // On punctuation boundary or within group of punctuation, find punctuation end. 804 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 805 } else { 806 // Not on a punctuation boundary, find the word end. 807 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 808 } 809 if (retOffset == BreakIterator.DONE) { 810 return offset; 811 } 812 return retOffset; 813 } 814 815 private boolean needsToSelectAllToSelectWordOrParagraph() { 816 if (mTextView.hasPasswordTransformationMethod()) { 817 // Always select all on a password field. 818 // Cut/copy menu entries are not available for passwords, but being able to select all 819 // is however useful to delete or paste to replace the entire content. 820 return true; 821 } 822 823 int inputType = mTextView.getInputType(); 824 int klass = inputType & InputType.TYPE_MASK_CLASS; 825 int variation = inputType & InputType.TYPE_MASK_VARIATION; 826 827 // Specific text field types: select the entire text for these 828 if (klass == InputType.TYPE_CLASS_NUMBER 829 || klass == InputType.TYPE_CLASS_PHONE 830 || klass == InputType.TYPE_CLASS_DATETIME 831 || variation == InputType.TYPE_TEXT_VARIATION_URI 832 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 833 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 834 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 835 return true; 836 } 837 return false; 838 } 839 840 /** 841 * Adjusts selection to the word under last touch offset. Return true if the operation was 842 * successfully performed. 843 */ 844 private boolean selectCurrentWord() { 845 if (!mTextView.canSelectText()) { 846 return false; 847 } 848 849 if (needsToSelectAllToSelectWordOrParagraph()) { 850 return mTextView.selectAllText(); 851 } 852 853 long lastTouchOffsets = getLastTouchOffsets(); 854 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 855 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 856 857 // Safety check in case standard touch event handling has been bypassed 858 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 859 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 860 861 int selectionStart, selectionEnd; 862 863 // If a URLSpan (web address, email, phone...) is found at that position, select it. 864 URLSpan[] urlSpans = 865 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 866 if (urlSpans.length >= 1) { 867 URLSpan urlSpan = urlSpans[0]; 868 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 869 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 870 } else { 871 // FIXME - We should check if there's a LocaleSpan in the text, this may be 872 // something we should try handling or checking for. 873 final WordIterator wordIterator = getWordIterator(); 874 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 875 876 selectionStart = wordIterator.getBeginning(minOffset); 877 selectionEnd = wordIterator.getEnd(maxOffset); 878 879 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 880 || selectionStart == selectionEnd) { 881 // Possible when the word iterator does not properly handle the text's language 882 long range = getCharClusterRange(minOffset); 883 selectionStart = TextUtils.unpackRangeStartFromLong(range); 884 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 885 } 886 } 887 888 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 889 return selectionEnd > selectionStart; 890 } 891 892 /** 893 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 894 * successfully performed. 895 */ 896 private boolean selectCurrentParagraph() { 897 if (!mTextView.canSelectText()) { 898 return false; 899 } 900 901 if (needsToSelectAllToSelectWordOrParagraph()) { 902 return mTextView.selectAllText(); 903 } 904 905 long lastTouchOffsets = getLastTouchOffsets(); 906 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 907 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 908 909 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 910 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 911 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 912 if (start < end) { 913 Selection.setSelection((Spannable) mTextView.getText(), start, end); 914 return true; 915 } 916 return false; 917 } 918 919 /** 920 * Get the minimum range of paragraphs that contains startOffset and endOffset. 921 */ 922 private long getParagraphsRange(int startOffset, int endOffset) { 923 final Layout layout = mTextView.getLayout(); 924 if (layout == null) { 925 return TextUtils.packRangeInLong(-1, -1); 926 } 927 final CharSequence text = mTextView.getText(); 928 int minLine = layout.getLineForOffset(startOffset); 929 // Search paragraph start. 930 while (minLine > 0) { 931 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 932 if (text.charAt(prevLineEndOffset - 1) == '\n') { 933 break; 934 } 935 minLine--; 936 } 937 int maxLine = layout.getLineForOffset(endOffset); 938 // Search paragraph end. 939 while (maxLine < layout.getLineCount() - 1) { 940 final int lineEndOffset = layout.getLineEnd(maxLine); 941 if (text.charAt(lineEndOffset - 1) == '\n') { 942 break; 943 } 944 maxLine++; 945 } 946 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 947 } 948 949 void onLocaleChanged() { 950 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 951 // proper new locale 952 mWordIterator = null; 953 mWordIteratorWithText = null; 954 } 955 956 public WordIterator getWordIterator() { 957 if (mWordIterator == null) { 958 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 959 } 960 return mWordIterator; 961 } 962 963 private WordIterator getWordIteratorWithText() { 964 if (mWordIteratorWithText == null) { 965 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 966 mUpdateWordIteratorText = true; 967 } 968 if (mUpdateWordIteratorText) { 969 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 970 // to the user's selection is needed. A possible solution would be to 971 // copy some number N of characters near the selection and then when the 972 // user approaches N then we'd do another copy of the next N characters. 973 CharSequence text = mTextView.getText(); 974 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 975 mUpdateWordIteratorText = false; 976 } 977 return mWordIteratorWithText; 978 } 979 980 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 981 final Layout layout = mTextView.getLayout(); 982 if (layout == null) return offset; 983 return findAfterGivenOffset == layout.isRtlCharAt(offset) 984 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 985 } 986 987 private long getCharClusterRange(int offset) { 988 final int textLength = mTextView.getText().length(); 989 if (offset < textLength) { 990 final int clusterEndOffset = getNextCursorOffset(offset, true); 991 return TextUtils.packRangeInLong( 992 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 993 } 994 if (offset - 1 >= 0) { 995 final int clusterStartOffset = getNextCursorOffset(offset, false); 996 return TextUtils.packRangeInLong(clusterStartOffset, 997 getNextCursorOffset(clusterStartOffset, true)); 998 } 999 return TextUtils.packRangeInLong(offset, offset); 1000 } 1001 1002 private boolean touchPositionIsInSelection() { 1003 int selectionStart = mTextView.getSelectionStart(); 1004 int selectionEnd = mTextView.getSelectionEnd(); 1005 1006 if (selectionStart == selectionEnd) { 1007 return false; 1008 } 1009 1010 if (selectionStart > selectionEnd) { 1011 int tmp = selectionStart; 1012 selectionStart = selectionEnd; 1013 selectionEnd = tmp; 1014 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1015 } 1016 1017 SelectionModifierCursorController selectionController = getSelectionController(); 1018 int minOffset = selectionController.getMinTouchOffset(); 1019 int maxOffset = selectionController.getMaxTouchOffset(); 1020 1021 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1022 } 1023 1024 private PositionListener getPositionListener() { 1025 if (mPositionListener == null) { 1026 mPositionListener = new PositionListener(); 1027 } 1028 return mPositionListener; 1029 } 1030 1031 private interface TextViewPositionListener { 1032 public void updatePosition(int parentPositionX, int parentPositionY, 1033 boolean parentPositionChanged, boolean parentScrolled); 1034 } 1035 1036 private boolean isOffsetVisible(int offset) { 1037 Layout layout = mTextView.getLayout(); 1038 if (layout == null) return false; 1039 1040 final int line = layout.getLineForOffset(offset); 1041 final int lineBottom = layout.getLineBottom(line); 1042 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1043 return mTextView.isPositionVisible( 1044 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1045 lineBottom + mTextView.viewportToContentVerticalOffset()); 1046 } 1047 1048 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1049 * in the view. Returns false when the position is in the empty space of left/right of text. 1050 */ 1051 private boolean isPositionOnText(float x, float y) { 1052 Layout layout = mTextView.getLayout(); 1053 if (layout == null) return false; 1054 1055 final int line = mTextView.getLineAtCoordinate(y); 1056 x = mTextView.convertToLocalHorizontalCoordinate(x); 1057 1058 if (x < layout.getLineLeft(line)) return false; 1059 if (x > layout.getLineRight(line)) return false; 1060 return true; 1061 } 1062 1063 private void startDragAndDrop() { 1064 // TODO: Fix drag and drop in full screen extracted mode. 1065 if (mTextView.isInExtractedMode()) { 1066 return; 1067 } 1068 final int start = mTextView.getSelectionStart(); 1069 final int end = mTextView.getSelectionEnd(); 1070 CharSequence selectedText = mTextView.getTransformedText(start, end); 1071 ClipData data = ClipData.newPlainText(null, selectedText); 1072 DragLocalState localState = new DragLocalState(mTextView, start, end); 1073 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1074 View.DRAG_FLAG_GLOBAL); 1075 stopTextActionMode(); 1076 if (hasSelectionController()) { 1077 getSelectionController().resetTouchOffsets(); 1078 } 1079 } 1080 1081 public boolean performLongClick(boolean handled) { 1082 // Long press in empty space moves cursor and starts the insertion action mode. 1083 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1084 && mInsertionControllerEnabled) { 1085 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1086 mLastDownPositionY); 1087 Selection.setSelection((Spannable) mTextView.getText(), offset); 1088 getInsertionController().show(); 1089 mIsInsertionActionModeStartPending = true; 1090 handled = true; 1091 MetricsLogger.action( 1092 mTextView.getContext(), 1093 MetricsEvent.TEXT_LONGPRESS, 1094 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1095 } 1096 1097 if (!handled && mTextActionMode != null) { 1098 if (touchPositionIsInSelection()) { 1099 startDragAndDrop(); 1100 MetricsLogger.action( 1101 mTextView.getContext(), 1102 MetricsEvent.TEXT_LONGPRESS, 1103 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1104 } else { 1105 stopTextActionMode(); 1106 selectCurrentWordAndStartDrag(); 1107 MetricsLogger.action( 1108 mTextView.getContext(), 1109 MetricsEvent.TEXT_LONGPRESS, 1110 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1111 } 1112 handled = true; 1113 } 1114 1115 // Start a new selection 1116 if (!handled) { 1117 handled = selectCurrentWordAndStartDrag(); 1118 if (handled) { 1119 MetricsLogger.action( 1120 mTextView.getContext(), 1121 MetricsEvent.TEXT_LONGPRESS, 1122 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1123 } 1124 } 1125 1126 return handled; 1127 } 1128 1129 private long getLastTouchOffsets() { 1130 SelectionModifierCursorController selectionController = getSelectionController(); 1131 final int minOffset = selectionController.getMinTouchOffset(); 1132 final int maxOffset = selectionController.getMaxTouchOffset(); 1133 return TextUtils.packRangeInLong(minOffset, maxOffset); 1134 } 1135 1136 void onFocusChanged(boolean focused, int direction) { 1137 mShowCursor = SystemClock.uptimeMillis(); 1138 ensureEndedBatchEdit(); 1139 1140 if (focused) { 1141 int selStart = mTextView.getSelectionStart(); 1142 int selEnd = mTextView.getSelectionEnd(); 1143 1144 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1145 // mode for these, unless there was a specific selection already started. 1146 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1147 && selEnd == mTextView.getText().length(); 1148 1149 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1150 && !isFocusHighlighted; 1151 1152 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1153 // If a tap was used to give focus to that view, move cursor at tap position. 1154 // Has to be done before onTakeFocus, which can be overloaded. 1155 final int lastTapPosition = getLastTapPosition(); 1156 if (lastTapPosition >= 0) { 1157 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1158 } 1159 1160 // Note this may have to be moved out of the Editor class 1161 MovementMethod mMovement = mTextView.getMovementMethod(); 1162 if (mMovement != null) { 1163 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1164 } 1165 1166 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1167 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1168 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1169 // This special case ensure that we keep current selection in that case. 1170 // It would be better to know why the DecorView does not have focus at that time. 1171 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1172 && selStart >= 0 && selEnd >= 0) { 1173 /* 1174 * Someone intentionally set the selection, so let them 1175 * do whatever it is that they wanted to do instead of 1176 * the default on-focus behavior. We reset the selection 1177 * here instead of just skipping the onTakeFocus() call 1178 * because some movement methods do something other than 1179 * just setting the selection in theirs and we still 1180 * need to go through that path. 1181 */ 1182 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1183 } 1184 1185 if (mSelectAllOnFocus) { 1186 mTextView.selectAllText(); 1187 } 1188 1189 mTouchFocusSelected = true; 1190 } 1191 1192 mFrozenWithFocus = false; 1193 mSelectionMoved = false; 1194 1195 if (mError != null) { 1196 showError(); 1197 } 1198 1199 makeBlink(); 1200 } else { 1201 if (mError != null) { 1202 hideError(); 1203 } 1204 // Don't leave us in the middle of a batch edit. 1205 mTextView.onEndBatchEdit(); 1206 1207 if (mTextView.isInExtractedMode()) { 1208 hideCursorAndSpanControllers(); 1209 stopTextActionModeWithPreservingSelection(); 1210 } else { 1211 hideCursorAndSpanControllers(); 1212 if (mTextView.isTemporarilyDetached()) { 1213 stopTextActionModeWithPreservingSelection(); 1214 } else { 1215 stopTextActionMode(); 1216 } 1217 downgradeEasyCorrectionSpans(); 1218 } 1219 // No need to create the controller 1220 if (mSelectionModifierCursorController != null) { 1221 mSelectionModifierCursorController.resetTouchOffsets(); 1222 } 1223 } 1224 } 1225 1226 /** 1227 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1228 * span. 1229 */ 1230 private void downgradeEasyCorrectionSpans() { 1231 CharSequence text = mTextView.getText(); 1232 if (text instanceof Spannable) { 1233 Spannable spannable = (Spannable) text; 1234 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1235 spannable.length(), SuggestionSpan.class); 1236 for (int i = 0; i < suggestionSpans.length; i++) { 1237 int flags = suggestionSpans[i].getFlags(); 1238 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1239 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1240 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1241 suggestionSpans[i].setFlags(flags); 1242 } 1243 } 1244 } 1245 } 1246 1247 void sendOnTextChanged(int start, int after) { 1248 updateSpellCheckSpans(start, start + after, false); 1249 1250 // Flip flag to indicate the word iterator needs to have the text reset. 1251 mUpdateWordIteratorText = true; 1252 1253 // Hide the controllers as soon as text is modified (typing, procedural...) 1254 // We do not hide the span controllers, since they can be added when a new text is 1255 // inserted into the text view (voice IME). 1256 hideCursorControllers(); 1257 // Reset drag accelerator. 1258 if (mSelectionModifierCursorController != null) { 1259 mSelectionModifierCursorController.resetTouchOffsets(); 1260 } 1261 stopTextActionMode(); 1262 } 1263 1264 private int getLastTapPosition() { 1265 // No need to create the controller at that point, no last tap position saved 1266 if (mSelectionModifierCursorController != null) { 1267 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1268 if (lastTapPosition >= 0) { 1269 // Safety check, should not be possible. 1270 if (lastTapPosition > mTextView.getText().length()) { 1271 lastTapPosition = mTextView.getText().length(); 1272 } 1273 return lastTapPosition; 1274 } 1275 } 1276 1277 return -1; 1278 } 1279 1280 void onWindowFocusChanged(boolean hasWindowFocus) { 1281 if (hasWindowFocus) { 1282 if (mBlink != null) { 1283 mBlink.uncancel(); 1284 makeBlink(); 1285 } 1286 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1287 refreshTextActionMode(); 1288 } 1289 } else { 1290 if (mBlink != null) { 1291 mBlink.cancel(); 1292 } 1293 if (mInputContentType != null) { 1294 mInputContentType.enterDown = false; 1295 } 1296 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1297 hideCursorAndSpanControllers(); 1298 stopTextActionModeWithPreservingSelection(); 1299 if (mSuggestionsPopupWindow != null) { 1300 mSuggestionsPopupWindow.onParentLostFocus(); 1301 } 1302 1303 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1304 ensureEndedBatchEdit(); 1305 } 1306 } 1307 1308 private void updateTapState(MotionEvent event) { 1309 final int action = event.getActionMasked(); 1310 if (action == MotionEvent.ACTION_DOWN) { 1311 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1312 // Detect double tap and triple click. 1313 if (((mTapState == TAP_STATE_FIRST_TAP) 1314 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1315 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1316 <= ViewConfiguration.getDoubleTapTimeout()) { 1317 if (mTapState == TAP_STATE_FIRST_TAP) { 1318 mTapState = TAP_STATE_DOUBLE_TAP; 1319 } else { 1320 mTapState = TAP_STATE_TRIPLE_CLICK; 1321 } 1322 } else { 1323 mTapState = TAP_STATE_FIRST_TAP; 1324 } 1325 } 1326 if (action == MotionEvent.ACTION_UP) { 1327 mLastTouchUpTime = SystemClock.uptimeMillis(); 1328 } 1329 } 1330 1331 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1332 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1333 return false; 1334 } 1335 final boolean primaryButtonStateChanged = 1336 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1337 final int action = event.getActionMasked(); 1338 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1339 && !primaryButtonStateChanged) { 1340 return true; 1341 } 1342 if (action == MotionEvent.ACTION_MOVE 1343 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1344 return true; 1345 } 1346 return false; 1347 } 1348 1349 void onTouchEvent(MotionEvent event) { 1350 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1351 mLastButtonState = event.getButtonState(); 1352 if (filterOutEvent) { 1353 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1354 mDiscardNextActionUp = true; 1355 } 1356 return; 1357 } 1358 updateTapState(event); 1359 updateFloatingToolbarVisibility(event); 1360 1361 if (hasSelectionController()) { 1362 getSelectionController().onTouchEvent(event); 1363 } 1364 1365 if (mShowSuggestionRunnable != null) { 1366 mTextView.removeCallbacks(mShowSuggestionRunnable); 1367 mShowSuggestionRunnable = null; 1368 } 1369 1370 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1371 mLastDownPositionX = event.getX(); 1372 mLastDownPositionY = event.getY(); 1373 1374 // Reset this state; it will be re-set if super.onTouchEvent 1375 // causes focus to move to the view. 1376 mTouchFocusSelected = false; 1377 mIgnoreActionUpEvent = false; 1378 } 1379 } 1380 1381 private void updateFloatingToolbarVisibility(MotionEvent event) { 1382 if (mTextActionMode != null) { 1383 switch (event.getActionMasked()) { 1384 case MotionEvent.ACTION_MOVE: 1385 hideFloatingToolbar(); 1386 break; 1387 case MotionEvent.ACTION_UP: // fall through 1388 case MotionEvent.ACTION_CANCEL: 1389 showFloatingToolbar(); 1390 } 1391 } 1392 } 1393 1394 private void hideFloatingToolbar() { 1395 if (mTextActionMode != null) { 1396 mTextView.removeCallbacks(mShowFloatingToolbar); 1397 mTextActionMode.hide(ActionMode.DEFAULT_HIDE_DURATION); 1398 } 1399 } 1400 1401 private void showFloatingToolbar() { 1402 if (mTextActionMode != null) { 1403 // Delay "show" so it doesn't interfere with click confirmations 1404 // or double-clicks that could "dismiss" the floating toolbar. 1405 int delay = ViewConfiguration.getDoubleTapTimeout(); 1406 mTextView.postDelayed(mShowFloatingToolbar, delay); 1407 } 1408 } 1409 1410 public void beginBatchEdit() { 1411 mInBatchEditControllers = true; 1412 final InputMethodState ims = mInputMethodState; 1413 if (ims != null) { 1414 int nesting = ++ims.mBatchEditNesting; 1415 if (nesting == 1) { 1416 ims.mCursorChanged = false; 1417 ims.mChangedDelta = 0; 1418 if (ims.mContentChanged) { 1419 // We already have a pending change from somewhere else, 1420 // so turn this into a full update. 1421 ims.mChangedStart = 0; 1422 ims.mChangedEnd = mTextView.getText().length(); 1423 } else { 1424 ims.mChangedStart = EXTRACT_UNKNOWN; 1425 ims.mChangedEnd = EXTRACT_UNKNOWN; 1426 ims.mContentChanged = false; 1427 } 1428 mUndoInputFilter.beginBatchEdit(); 1429 mTextView.onBeginBatchEdit(); 1430 } 1431 } 1432 } 1433 1434 public void endBatchEdit() { 1435 mInBatchEditControllers = false; 1436 final InputMethodState ims = mInputMethodState; 1437 if (ims != null) { 1438 int nesting = --ims.mBatchEditNesting; 1439 if (nesting == 0) { 1440 finishBatchEdit(ims); 1441 } 1442 } 1443 } 1444 1445 void ensureEndedBatchEdit() { 1446 final InputMethodState ims = mInputMethodState; 1447 if (ims != null && ims.mBatchEditNesting != 0) { 1448 ims.mBatchEditNesting = 0; 1449 finishBatchEdit(ims); 1450 } 1451 } 1452 1453 void finishBatchEdit(final InputMethodState ims) { 1454 mTextView.onEndBatchEdit(); 1455 mUndoInputFilter.endBatchEdit(); 1456 1457 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1458 mTextView.updateAfterEdit(); 1459 reportExtractedText(); 1460 } else if (ims.mCursorChanged) { 1461 // Cheesy way to get us to report the current cursor location. 1462 mTextView.invalidateCursor(); 1463 } 1464 // sendUpdateSelection knows to avoid sending if the selection did 1465 // not actually change. 1466 sendUpdateSelection(); 1467 1468 // Show drag handles if they were blocked by batch edit mode. 1469 if (mTextActionMode != null) { 1470 final CursorController cursorController = mTextView.hasSelection() 1471 ? getSelectionController() : getInsertionController(); 1472 if (cursorController != null && !cursorController.isActive() 1473 && !cursorController.isCursorBeingModified()) { 1474 cursorController.show(); 1475 } 1476 } 1477 } 1478 1479 static final int EXTRACT_NOTHING = -2; 1480 static final int EXTRACT_UNKNOWN = -1; 1481 1482 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1483 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1484 EXTRACT_UNKNOWN, outText); 1485 } 1486 1487 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1488 int partialStartOffset, int partialEndOffset, int delta, 1489 @Nullable ExtractedText outText) { 1490 if (request == null || outText == null) { 1491 return false; 1492 } 1493 1494 final CharSequence content = mTextView.getText(); 1495 if (content == null) { 1496 return false; 1497 } 1498 1499 if (partialStartOffset != EXTRACT_NOTHING) { 1500 final int N = content.length(); 1501 if (partialStartOffset < 0) { 1502 outText.partialStartOffset = outText.partialEndOffset = -1; 1503 partialStartOffset = 0; 1504 partialEndOffset = N; 1505 } else { 1506 // Now use the delta to determine the actual amount of text 1507 // we need. 1508 partialEndOffset += delta; 1509 // Adjust offsets to ensure we contain full spans. 1510 if (content instanceof Spanned) { 1511 Spanned spanned = (Spanned) content; 1512 Object[] spans = spanned.getSpans(partialStartOffset, 1513 partialEndOffset, ParcelableSpan.class); 1514 int i = spans.length; 1515 while (i > 0) { 1516 i--; 1517 int j = spanned.getSpanStart(spans[i]); 1518 if (j < partialStartOffset) partialStartOffset = j; 1519 j = spanned.getSpanEnd(spans[i]); 1520 if (j > partialEndOffset) partialEndOffset = j; 1521 } 1522 } 1523 outText.partialStartOffset = partialStartOffset; 1524 outText.partialEndOffset = partialEndOffset - delta; 1525 1526 if (partialStartOffset > N) { 1527 partialStartOffset = N; 1528 } else if (partialStartOffset < 0) { 1529 partialStartOffset = 0; 1530 } 1531 if (partialEndOffset > N) { 1532 partialEndOffset = N; 1533 } else if (partialEndOffset < 0) { 1534 partialEndOffset = 0; 1535 } 1536 } 1537 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1538 outText.text = content.subSequence(partialStartOffset, 1539 partialEndOffset); 1540 } else { 1541 outText.text = TextUtils.substring(content, partialStartOffset, 1542 partialEndOffset); 1543 } 1544 } else { 1545 outText.partialStartOffset = 0; 1546 outText.partialEndOffset = 0; 1547 outText.text = ""; 1548 } 1549 outText.flags = 0; 1550 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1551 outText.flags |= ExtractedText.FLAG_SELECTING; 1552 } 1553 if (mTextView.isSingleLine()) { 1554 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1555 } 1556 outText.startOffset = 0; 1557 outText.selectionStart = mTextView.getSelectionStart(); 1558 outText.selectionEnd = mTextView.getSelectionEnd(); 1559 return true; 1560 } 1561 1562 boolean reportExtractedText() { 1563 final Editor.InputMethodState ims = mInputMethodState; 1564 if (ims != null) { 1565 final boolean contentChanged = ims.mContentChanged; 1566 if (contentChanged || ims.mSelectionModeChanged) { 1567 ims.mContentChanged = false; 1568 ims.mSelectionModeChanged = false; 1569 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1570 if (req != null) { 1571 InputMethodManager imm = InputMethodManager.peekInstance(); 1572 if (imm != null) { 1573 if (TextView.DEBUG_EXTRACT) { 1574 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1575 + ims.mChangedStart 1576 + " end=" + ims.mChangedEnd 1577 + " delta=" + ims.mChangedDelta); 1578 } 1579 if (ims.mChangedStart < 0 && !contentChanged) { 1580 ims.mChangedStart = EXTRACT_NOTHING; 1581 } 1582 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1583 ims.mChangedDelta, ims.mExtractedText)) { 1584 if (TextView.DEBUG_EXTRACT) { 1585 Log.v(TextView.LOG_TAG, 1586 "Reporting extracted start=" 1587 + ims.mExtractedText.partialStartOffset 1588 + " end=" + ims.mExtractedText.partialEndOffset 1589 + ": " + ims.mExtractedText.text); 1590 } 1591 1592 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1593 ims.mChangedStart = EXTRACT_UNKNOWN; 1594 ims.mChangedEnd = EXTRACT_UNKNOWN; 1595 ims.mChangedDelta = 0; 1596 ims.mContentChanged = false; 1597 return true; 1598 } 1599 } 1600 } 1601 } 1602 } 1603 return false; 1604 } 1605 1606 private void sendUpdateSelection() { 1607 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1608 final InputMethodManager imm = InputMethodManager.peekInstance(); 1609 if (null != imm) { 1610 final int selectionStart = mTextView.getSelectionStart(); 1611 final int selectionEnd = mTextView.getSelectionEnd(); 1612 int candStart = -1; 1613 int candEnd = -1; 1614 if (mTextView.getText() instanceof Spannable) { 1615 final Spannable sp = (Spannable) mTextView.getText(); 1616 candStart = EditableInputConnection.getComposingSpanStart(sp); 1617 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1618 } 1619 // InputMethodManager#updateSelection skips sending the message if 1620 // none of the parameters have changed since the last time we called it. 1621 imm.updateSelection(mTextView, 1622 selectionStart, selectionEnd, candStart, candEnd); 1623 } 1624 } 1625 } 1626 1627 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1628 int cursorOffsetVertical) { 1629 final int selectionStart = mTextView.getSelectionStart(); 1630 final int selectionEnd = mTextView.getSelectionEnd(); 1631 1632 final InputMethodState ims = mInputMethodState; 1633 if (ims != null && ims.mBatchEditNesting == 0) { 1634 InputMethodManager imm = InputMethodManager.peekInstance(); 1635 if (imm != null) { 1636 if (imm.isActive(mTextView)) { 1637 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1638 // We are in extract mode and the content has changed 1639 // in some way... just report complete new text to the 1640 // input method. 1641 reportExtractedText(); 1642 } 1643 } 1644 } 1645 } 1646 1647 if (mCorrectionHighlighter != null) { 1648 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1649 } 1650 1651 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1652 drawCursor(canvas, cursorOffsetVertical); 1653 // Rely on the drawable entirely, do not draw the cursor line. 1654 // Has to be done after the IMM related code above which relies on the highlight. 1655 highlight = null; 1656 } 1657 1658 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1659 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1660 cursorOffsetVertical); 1661 } else { 1662 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1663 } 1664 } 1665 1666 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1667 Paint highlightPaint, int cursorOffsetVertical) { 1668 final long lineRange = layout.getLineRangeForDraw(canvas); 1669 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1670 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1671 if (lastLine < 0) return; 1672 1673 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1674 firstLine, lastLine); 1675 1676 if (layout instanceof DynamicLayout) { 1677 if (mTextRenderNodes == null) { 1678 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1679 } 1680 1681 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1682 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1683 int[] blockIndices = dynamicLayout.getBlockIndices(); 1684 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1685 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1686 1687 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1688 if (blockSet != null) { 1689 for (int i = 0; i < blockSet.size(); i++) { 1690 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1691 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1692 && mTextRenderNodes[blockIndex] != null) { 1693 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1694 } 1695 } 1696 } 1697 1698 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1699 if (startBlock < 0) { 1700 startBlock = -(startBlock + 1); 1701 } 1702 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1703 1704 int startIndexToFindAvailableRenderNode = 0; 1705 int lastIndex = numberOfBlocks; 1706 1707 for (int i = startBlock; i < numberOfBlocks; i++) { 1708 final int blockIndex = blockIndices[i]; 1709 if (i >= indexFirstChangedBlock 1710 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1711 && mTextRenderNodes[blockIndex] != null) { 1712 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1713 } 1714 if (blockEndLines[i] < firstLine) { 1715 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1716 // be redrawn after they get scrolled into drawing range. 1717 continue; 1718 } 1719 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1720 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1721 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1722 if (blockEndLines[i] >= lastLine) { 1723 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1724 break; 1725 } 1726 } 1727 if (blockSet != null) { 1728 for (int i = 0; i < blockSet.size(); i++) { 1729 final int block = blockSet.valueAt(i); 1730 final int blockIndex = dynamicLayout.getBlockIndex(block); 1731 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1732 || mTextRenderNodes[blockIndex] == null 1733 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1734 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1735 layout, highlight, highlightPaint, cursorOffsetVertical, 1736 blockEndLines, blockIndices, block, numberOfBlocks, 1737 startIndexToFindAvailableRenderNode); 1738 } 1739 } 1740 } 1741 1742 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1743 } else { 1744 // Boring layout is used for empty and hint text 1745 layout.drawText(canvas, firstLine, lastLine); 1746 } 1747 } 1748 1749 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1750 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1751 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1752 int startIndexToFindAvailableRenderNode) { 1753 final int blockEndLine = blockEndLines[blockInfoIndex]; 1754 int blockIndex = blockIndices[blockInfoIndex]; 1755 1756 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1757 if (blockIsInvalid) { 1758 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1759 startIndexToFindAvailableRenderNode); 1760 // Note how dynamic layout's internal block indices get updated from Editor 1761 blockIndices[blockInfoIndex] = blockIndex; 1762 if (mTextRenderNodes[blockIndex] != null) { 1763 mTextRenderNodes[blockIndex].isDirty = true; 1764 } 1765 startIndexToFindAvailableRenderNode = blockIndex + 1; 1766 } 1767 1768 if (mTextRenderNodes[blockIndex] == null) { 1769 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1770 } 1771 1772 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1773 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1774 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1775 final int blockBeginLine = blockInfoIndex == 0 ? 1776 0 : blockEndLines[blockInfoIndex - 1] + 1; 1777 final int top = layout.getLineTop(blockBeginLine); 1778 final int bottom = layout.getLineBottom(blockEndLine); 1779 int left = 0; 1780 int right = mTextView.getWidth(); 1781 if (mTextView.getHorizontallyScrolling()) { 1782 float min = Float.MAX_VALUE; 1783 float max = Float.MIN_VALUE; 1784 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1785 min = Math.min(min, layout.getLineLeft(line)); 1786 max = Math.max(max, layout.getLineRight(line)); 1787 } 1788 left = (int) min; 1789 right = (int) (max + 0.5f); 1790 } 1791 1792 // Rebuild display list if it is invalid 1793 if (blockDisplayListIsInvalid) { 1794 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1795 right - left, bottom - top); 1796 try { 1797 // drawText is always relative to TextView's origin, this translation 1798 // brings this range of text back to the top left corner of the viewport 1799 displayListCanvas.translate(-left, -top); 1800 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1801 mTextRenderNodes[blockIndex].isDirty = false; 1802 // No need to untranslate, previous context is popped after 1803 // drawDisplayList 1804 } finally { 1805 blockDisplayList.end(displayListCanvas); 1806 // Same as drawDisplayList below, handled by our TextView's parent 1807 blockDisplayList.setClipToBounds(false); 1808 } 1809 } 1810 1811 // Valid display list only needs to update its drawing location. 1812 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1813 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1814 } 1815 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1816 return startIndexToFindAvailableRenderNode; 1817 } 1818 1819 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1820 int searchStartIndex) { 1821 int length = mTextRenderNodes.length; 1822 for (int i = searchStartIndex; i < length; i++) { 1823 boolean blockIndexFound = false; 1824 for (int j = 0; j < numberOfBlocks; j++) { 1825 if (blockIndices[j] == i) { 1826 blockIndexFound = true; 1827 break; 1828 } 1829 } 1830 if (blockIndexFound) continue; 1831 return i; 1832 } 1833 1834 // No available index found, the pool has to grow 1835 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1836 return length; 1837 } 1838 1839 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1840 final boolean translate = cursorOffsetVertical != 0; 1841 if (translate) canvas.translate(0, cursorOffsetVertical); 1842 for (int i = 0; i < mCursorCount; i++) { 1843 mCursorDrawable[i].draw(canvas); 1844 } 1845 if (translate) canvas.translate(0, -cursorOffsetVertical); 1846 } 1847 1848 void invalidateHandlesAndActionMode() { 1849 if (mSelectionModifierCursorController != null) { 1850 mSelectionModifierCursorController.invalidateHandles(); 1851 } 1852 if (mInsertionPointCursorController != null) { 1853 mInsertionPointCursorController.invalidateHandle(); 1854 } 1855 if (mTextActionMode != null) { 1856 invalidateActionModeAsync(); 1857 } 1858 } 1859 1860 /** 1861 * Invalidates all the sub-display lists that overlap the specified character range 1862 */ 1863 void invalidateTextDisplayList(Layout layout, int start, int end) { 1864 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1865 final int firstLine = layout.getLineForOffset(start); 1866 final int lastLine = layout.getLineForOffset(end); 1867 1868 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1869 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1870 int[] blockIndices = dynamicLayout.getBlockIndices(); 1871 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1872 1873 int i = 0; 1874 // Skip the blocks before firstLine 1875 while (i < numberOfBlocks) { 1876 if (blockEndLines[i] >= firstLine) break; 1877 i++; 1878 } 1879 1880 // Invalidate all subsequent blocks until lastLine is passed 1881 while (i < numberOfBlocks) { 1882 final int blockIndex = blockIndices[i]; 1883 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1884 mTextRenderNodes[blockIndex].isDirty = true; 1885 } 1886 if (blockEndLines[i] >= lastLine) break; 1887 i++; 1888 } 1889 } 1890 } 1891 1892 void invalidateTextDisplayList() { 1893 if (mTextRenderNodes != null) { 1894 for (int i = 0; i < mTextRenderNodes.length; i++) { 1895 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1896 } 1897 } 1898 } 1899 1900 void updateCursorsPositions() { 1901 if (mTextView.mCursorDrawableRes == 0) { 1902 mCursorCount = 0; 1903 return; 1904 } 1905 1906 Layout layout = mTextView.getLayout(); 1907 final int offset = mTextView.getSelectionStart(); 1908 final int line = layout.getLineForOffset(offset); 1909 final int top = layout.getLineTop(line); 1910 final int bottom = layout.getLineTop(line + 1); 1911 1912 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1913 1914 int middle = bottom; 1915 if (mCursorCount == 2) { 1916 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1917 middle = (top + bottom) >> 1; 1918 } 1919 1920 boolean clamped = layout.shouldClampCursor(line); 1921 updateCursorPosition(0, top, middle, layout.getPrimaryHorizontal(offset, clamped)); 1922 1923 if (mCursorCount == 2) { 1924 updateCursorPosition(1, middle, bottom, layout.getSecondaryHorizontal(offset, clamped)); 1925 } 1926 } 1927 1928 void refreshTextActionMode() { 1929 if (extractedTextModeWillBeStarted()) { 1930 mRestartActionModeOnNextRefresh = false; 1931 return; 1932 } 1933 final boolean hasSelection = mTextView.hasSelection(); 1934 final SelectionModifierCursorController selectionController = getSelectionController(); 1935 final InsertionPointCursorController insertionController = getInsertionController(); 1936 if ((selectionController != null && selectionController.isCursorBeingModified()) 1937 || (insertionController != null && insertionController.isCursorBeingModified())) { 1938 // ActionMode should be managed by the currently active cursor controller. 1939 mRestartActionModeOnNextRefresh = false; 1940 return; 1941 } 1942 if (hasSelection) { 1943 hideInsertionPointCursorController(); 1944 if (mTextActionMode == null) { 1945 if (mRestartActionModeOnNextRefresh) { 1946 // To avoid distraction, newly start action mode only when selection action 1947 // mode is being restarted. 1948 startSelectionActionMode(); 1949 } 1950 } else if (selectionController == null || !selectionController.isActive()) { 1951 // Insertion action mode is active. Avoid dismissing the selection. 1952 stopTextActionModeWithPreservingSelection(); 1953 startSelectionActionMode(); 1954 } else { 1955 mTextActionMode.invalidateContentRect(); 1956 } 1957 } else { 1958 // Insertion action mode is started only when insertion controller is explicitly 1959 // activated. 1960 if (insertionController == null || !insertionController.isActive()) { 1961 stopTextActionMode(); 1962 } else if (mTextActionMode != null) { 1963 mTextActionMode.invalidateContentRect(); 1964 } 1965 } 1966 mRestartActionModeOnNextRefresh = false; 1967 } 1968 1969 /** 1970 * Start an Insertion action mode. 1971 */ 1972 void startInsertionActionMode() { 1973 if (mInsertionActionModeRunnable != null) { 1974 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1975 } 1976 if (extractedTextModeWillBeStarted()) { 1977 return; 1978 } 1979 stopTextActionMode(); 1980 1981 ActionMode.Callback actionModeCallback = 1982 new TextActionModeCallback(false /* hasSelection */); 1983 mTextActionMode = mTextView.startActionMode( 1984 actionModeCallback, ActionMode.TYPE_FLOATING); 1985 if (mTextActionMode != null && getInsertionController() != null) { 1986 getInsertionController().show(); 1987 } 1988 } 1989 1990 @NonNull 1991 TextView getTextView() { 1992 return mTextView; 1993 } 1994 1995 @Nullable 1996 ActionMode getTextActionMode() { 1997 return mTextActionMode; 1998 } 1999 2000 void setRestartActionModeOnNextRefresh(boolean value) { 2001 mRestartActionModeOnNextRefresh = value; 2002 } 2003 2004 /** 2005 * Asynchronously starts a selection action mode using the TextClassifier. 2006 */ 2007 void startSelectionActionModeAsync() { 2008 getSelectionActionModeHelper().startActionModeAsync(); 2009 } 2010 2011 /** 2012 * Synchronously starts a selection action mode without the TextClassifier. 2013 */ 2014 void startSelectionActionMode() { 2015 getSelectionActionModeHelper().startActionMode(); 2016 } 2017 2018 /** 2019 * Asynchronously invalidates an action mode using the TextClassifier. 2020 */ 2021 private void invalidateActionModeAsync() { 2022 getSelectionActionModeHelper().invalidateActionModeAsync(); 2023 } 2024 2025 private SelectionActionModeHelper getSelectionActionModeHelper() { 2026 if (mSelectionActionModeHelper == null) { 2027 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2028 } 2029 return mSelectionActionModeHelper; 2030 } 2031 2032 /** 2033 * If the TextView allows text selection, selects the current word when no existing selection 2034 * was available and starts a drag. 2035 * 2036 * @return true if the drag was started. 2037 */ 2038 private boolean selectCurrentWordAndStartDrag() { 2039 if (mInsertionActionModeRunnable != null) { 2040 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2041 } 2042 if (extractedTextModeWillBeStarted()) { 2043 return false; 2044 } 2045 if (!checkField()) { 2046 return false; 2047 } 2048 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2049 // No selection and cannot select a word. 2050 return false; 2051 } 2052 stopTextActionModeWithPreservingSelection(); 2053 getSelectionController().enterDrag( 2054 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2055 return true; 2056 } 2057 2058 /** 2059 * Checks whether a selection can be performed on the current TextView. 2060 * 2061 * @return true if a selection can be performed 2062 */ 2063 boolean checkField() { 2064 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2065 Log.w(TextView.LOG_TAG, 2066 "TextView does not support text selection. Selection cancelled."); 2067 return false; 2068 } 2069 return true; 2070 } 2071 2072 boolean startSelectionActionModeInternal() { 2073 if (extractedTextModeWillBeStarted()) { 2074 return false; 2075 } 2076 if (mTextActionMode != null) { 2077 // Text action mode is already started 2078 invalidateActionModeAsync(); 2079 return false; 2080 } 2081 2082 if (!checkField() || !mTextView.hasSelection()) { 2083 return false; 2084 } 2085 2086 ActionMode.Callback actionModeCallback = 2087 new TextActionModeCallback(true /* hasSelection */); 2088 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2089 2090 final boolean selectionStarted = mTextActionMode != null; 2091 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2092 // Show the IME to be able to replace text, except when selecting non editable text. 2093 final InputMethodManager imm = InputMethodManager.peekInstance(); 2094 if (imm != null) { 2095 imm.showSoftInput(mTextView, 0, null); 2096 } 2097 } 2098 return selectionStarted; 2099 } 2100 2101 private boolean extractedTextModeWillBeStarted() { 2102 if (!(mTextView.isInExtractedMode())) { 2103 final InputMethodManager imm = InputMethodManager.peekInstance(); 2104 return imm != null && imm.isFullscreenMode(); 2105 } 2106 return false; 2107 } 2108 2109 /** 2110 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2111 * the current cursor position or selection range. This method is consistent with the 2112 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2113 */ 2114 private boolean shouldOfferToShowSuggestions() { 2115 CharSequence text = mTextView.getText(); 2116 if (!(text instanceof Spannable)) return false; 2117 2118 final Spannable spannable = (Spannable) text; 2119 final int selectionStart = mTextView.getSelectionStart(); 2120 final int selectionEnd = mTextView.getSelectionEnd(); 2121 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2122 SuggestionSpan.class); 2123 if (suggestionSpans.length == 0) { 2124 return false; 2125 } 2126 if (selectionStart == selectionEnd) { 2127 // Spans overlap the cursor. 2128 for (int i = 0; i < suggestionSpans.length; i++) { 2129 if (suggestionSpans[i].getSuggestions().length > 0) { 2130 return true; 2131 } 2132 } 2133 return false; 2134 } 2135 int minSpanStart = mTextView.getText().length(); 2136 int maxSpanEnd = 0; 2137 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2138 int unionOfSpansCoveringSelectionStartEnd = 0; 2139 boolean hasValidSuggestions = false; 2140 for (int i = 0; i < suggestionSpans.length; i++) { 2141 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2142 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2143 minSpanStart = Math.min(minSpanStart, spanStart); 2144 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2145 if (selectionStart < spanStart || selectionStart > spanEnd) { 2146 // The span doesn't cover the current selection start point. 2147 continue; 2148 } 2149 hasValidSuggestions = 2150 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2151 unionOfSpansCoveringSelectionStartStart = 2152 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2153 unionOfSpansCoveringSelectionStartEnd = 2154 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2155 } 2156 if (!hasValidSuggestions) { 2157 return false; 2158 } 2159 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2160 // No spans cover the selection start point. 2161 return false; 2162 } 2163 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2164 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2165 // There is a span that is not covered by the union. In this case, we soouldn't offer 2166 // to show suggestions as it's confusing. 2167 return false; 2168 } 2169 return true; 2170 } 2171 2172 /** 2173 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2174 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2175 */ 2176 private boolean isCursorInsideEasyCorrectionSpan() { 2177 Spannable spannable = (Spannable) mTextView.getText(); 2178 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2179 mTextView.getSelectionEnd(), SuggestionSpan.class); 2180 for (int i = 0; i < suggestionSpans.length; i++) { 2181 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2182 return true; 2183 } 2184 } 2185 return false; 2186 } 2187 2188 void onTouchUpEvent(MotionEvent event) { 2189 if (getSelectionActionModeHelper().resetOriginalSelection( 2190 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2191 return; 2192 } 2193 2194 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2195 hideCursorAndSpanControllers(); 2196 stopTextActionMode(); 2197 CharSequence text = mTextView.getText(); 2198 if (!selectAllGotFocus && text.length() > 0) { 2199 // Move cursor 2200 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2201 Selection.setSelection((Spannable) text, offset); 2202 if (mSpellChecker != null) { 2203 // When the cursor moves, the word that was typed may need spell check 2204 mSpellChecker.onSelectionChanged(); 2205 } 2206 2207 if (!extractedTextModeWillBeStarted()) { 2208 if (isCursorInsideEasyCorrectionSpan()) { 2209 // Cancel the single tap delayed runnable. 2210 if (mInsertionActionModeRunnable != null) { 2211 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2212 } 2213 2214 mShowSuggestionRunnable = new Runnable() { 2215 public void run() { 2216 replace(); 2217 } 2218 }; 2219 // removeCallbacks is performed on every touch 2220 mTextView.postDelayed(mShowSuggestionRunnable, 2221 ViewConfiguration.getDoubleTapTimeout()); 2222 } else if (hasInsertionController()) { 2223 getInsertionController().show(); 2224 } 2225 } 2226 } 2227 } 2228 2229 protected void stopTextActionMode() { 2230 if (mTextActionMode != null) { 2231 // This will hide the mSelectionModifierCursorController 2232 mTextActionMode.finish(); 2233 } 2234 } 2235 2236 private void stopTextActionModeWithPreservingSelection() { 2237 if (mTextActionMode != null) { 2238 mRestartActionModeOnNextRefresh = true; 2239 } 2240 mPreserveSelection = true; 2241 stopTextActionMode(); 2242 mPreserveSelection = false; 2243 } 2244 2245 /** 2246 * @return True if this view supports insertion handles. 2247 */ 2248 boolean hasInsertionController() { 2249 return mInsertionControllerEnabled; 2250 } 2251 2252 /** 2253 * @return True if this view supports selection handles. 2254 */ 2255 boolean hasSelectionController() { 2256 return mSelectionControllerEnabled; 2257 } 2258 2259 private InsertionPointCursorController getInsertionController() { 2260 if (!mInsertionControllerEnabled) { 2261 return null; 2262 } 2263 2264 if (mInsertionPointCursorController == null) { 2265 mInsertionPointCursorController = new InsertionPointCursorController(); 2266 2267 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2268 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2269 } 2270 2271 return mInsertionPointCursorController; 2272 } 2273 2274 @Nullable 2275 SelectionModifierCursorController getSelectionController() { 2276 if (!mSelectionControllerEnabled) { 2277 return null; 2278 } 2279 2280 if (mSelectionModifierCursorController == null) { 2281 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2282 2283 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2284 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2285 } 2286 2287 return mSelectionModifierCursorController; 2288 } 2289 2290 @VisibleForTesting 2291 public Drawable[] getCursorDrawable() { 2292 return mCursorDrawable; 2293 } 2294 2295 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2296 if (mCursorDrawable[cursorIndex] == null) { 2297 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2298 mTextView.mCursorDrawableRes); 2299 } 2300 final Drawable drawable = mCursorDrawable[cursorIndex]; 2301 final int left = clampHorizontalPosition(drawable, horizontal); 2302 final int width = drawable.getIntrinsicWidth(); 2303 drawable.setBounds(left, top - mTempRect.top, left + width, 2304 bottom + mTempRect.bottom); 2305 } 2306 2307 /** 2308 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2309 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2310 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2311 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2312 * of the view. 2313 * 2314 * @param drawable Drawable. Can be null. 2315 * @param horizontal Horizontal position for the drawable. 2316 * @return The clamped horizontal position for the drawable. 2317 */ 2318 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2319 horizontal = Math.max(0.5f, horizontal - 0.5f); 2320 if (mTempRect == null) mTempRect = new Rect(); 2321 2322 int drawableWidth = 0; 2323 if (drawable != null) { 2324 drawable.getPadding(mTempRect); 2325 drawableWidth = drawable.getIntrinsicWidth(); 2326 } else { 2327 mTempRect.setEmpty(); 2328 } 2329 2330 int scrollX = mTextView.getScrollX(); 2331 float horizontalDiff = horizontal - scrollX; 2332 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2333 - mTextView.getCompoundPaddingRight(); 2334 2335 final int left; 2336 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2337 // at the rightmost position 2338 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2339 } else if (Math.abs(horizontalDiff) <= 1f 2340 || (TextUtils.isEmpty(mTextView.getText()) 2341 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2342 && horizontal <= 1f)) { 2343 // at the leftmost position 2344 left = scrollX - mTempRect.left; 2345 } else { 2346 left = (int) horizontal - mTempRect.left; 2347 } 2348 return left; 2349 } 2350 2351 /** 2352 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2353 * a dictionary) from the current input method, provided by it calling 2354 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2355 * implementation flashes the background of the corrected word to provide feedback to the user. 2356 * 2357 * @param info The auto correct info about the text that was corrected. 2358 */ 2359 public void onCommitCorrection(CorrectionInfo info) { 2360 if (mCorrectionHighlighter == null) { 2361 mCorrectionHighlighter = new CorrectionHighlighter(); 2362 } else { 2363 mCorrectionHighlighter.invalidate(false); 2364 } 2365 2366 mCorrectionHighlighter.highlight(info); 2367 mUndoInputFilter.freezeLastEdit(); 2368 } 2369 2370 void onScrollChanged() { 2371 if (mPositionListener != null) { 2372 mPositionListener.onScrollChanged(); 2373 } 2374 if (mTextActionMode != null) { 2375 mTextActionMode.invalidateContentRect(); 2376 } 2377 } 2378 2379 /** 2380 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2381 */ 2382 private boolean shouldBlink() { 2383 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2384 2385 final int start = mTextView.getSelectionStart(); 2386 if (start < 0) return false; 2387 2388 final int end = mTextView.getSelectionEnd(); 2389 if (end < 0) return false; 2390 2391 return start == end; 2392 } 2393 2394 void makeBlink() { 2395 if (shouldBlink()) { 2396 mShowCursor = SystemClock.uptimeMillis(); 2397 if (mBlink == null) mBlink = new Blink(); 2398 mTextView.removeCallbacks(mBlink); 2399 mTextView.postDelayed(mBlink, BLINK); 2400 } else { 2401 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2402 } 2403 } 2404 2405 private class Blink implements Runnable { 2406 private boolean mCancelled; 2407 2408 public void run() { 2409 if (mCancelled) { 2410 return; 2411 } 2412 2413 mTextView.removeCallbacks(this); 2414 2415 if (shouldBlink()) { 2416 if (mTextView.getLayout() != null) { 2417 mTextView.invalidateCursorPath(); 2418 } 2419 2420 mTextView.postDelayed(this, BLINK); 2421 } 2422 } 2423 2424 void cancel() { 2425 if (!mCancelled) { 2426 mTextView.removeCallbacks(this); 2427 mCancelled = true; 2428 } 2429 } 2430 2431 void uncancel() { 2432 mCancelled = false; 2433 } 2434 } 2435 2436 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2437 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2438 com.android.internal.R.layout.text_drag_thumbnail, null); 2439 2440 if (shadowView == null) { 2441 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2442 } 2443 2444 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2445 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2446 end = TextUtils.unpackRangeEndFromLong(range); 2447 } 2448 final CharSequence text = mTextView.getTransformedText(start, end); 2449 shadowView.setText(text); 2450 shadowView.setTextColor(mTextView.getTextColors()); 2451 2452 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2453 shadowView.setGravity(Gravity.CENTER); 2454 2455 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2456 ViewGroup.LayoutParams.WRAP_CONTENT)); 2457 2458 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2459 shadowView.measure(size, size); 2460 2461 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2462 shadowView.invalidate(); 2463 return new DragShadowBuilder(shadowView); 2464 } 2465 2466 private static class DragLocalState { 2467 public TextView sourceTextView; 2468 public int start, end; 2469 2470 public DragLocalState(TextView sourceTextView, int start, int end) { 2471 this.sourceTextView = sourceTextView; 2472 this.start = start; 2473 this.end = end; 2474 } 2475 } 2476 2477 void onDrop(DragEvent event) { 2478 SpannableStringBuilder content = new SpannableStringBuilder(); 2479 2480 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2481 if (permissions != null) { 2482 permissions.takeTransient(); 2483 } 2484 2485 try { 2486 ClipData clipData = event.getClipData(); 2487 final int itemCount = clipData.getItemCount(); 2488 for (int i = 0; i < itemCount; i++) { 2489 Item item = clipData.getItemAt(i); 2490 content.append(item.coerceToStyledText(mTextView.getContext())); 2491 } 2492 } finally { 2493 if (permissions != null) { 2494 permissions.release(); 2495 } 2496 } 2497 2498 mTextView.beginBatchEdit(); 2499 mUndoInputFilter.freezeLastEdit(); 2500 try { 2501 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2502 Object localState = event.getLocalState(); 2503 DragLocalState dragLocalState = null; 2504 if (localState instanceof DragLocalState) { 2505 dragLocalState = (DragLocalState) localState; 2506 } 2507 boolean dragDropIntoItself = dragLocalState != null 2508 && dragLocalState.sourceTextView == mTextView; 2509 2510 if (dragDropIntoItself) { 2511 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2512 // A drop inside the original selection discards the drop. 2513 return; 2514 } 2515 } 2516 2517 final int originalLength = mTextView.getText().length(); 2518 int min = offset; 2519 int max = offset; 2520 2521 Selection.setSelection((Spannable) mTextView.getText(), max); 2522 mTextView.replaceText_internal(min, max, content); 2523 2524 if (dragDropIntoItself) { 2525 int dragSourceStart = dragLocalState.start; 2526 int dragSourceEnd = dragLocalState.end; 2527 if (max <= dragSourceStart) { 2528 // Inserting text before selection has shifted positions 2529 final int shift = mTextView.getText().length() - originalLength; 2530 dragSourceStart += shift; 2531 dragSourceEnd += shift; 2532 } 2533 2534 // Delete original selection 2535 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2536 2537 // Make sure we do not leave two adjacent spaces. 2538 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2539 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2540 if (nextCharIdx > prevCharIdx + 1) { 2541 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2542 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2543 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2544 } 2545 } 2546 } 2547 } finally { 2548 mTextView.endBatchEdit(); 2549 mUndoInputFilter.freezeLastEdit(); 2550 } 2551 } 2552 2553 public void addSpanWatchers(Spannable text) { 2554 final int textLength = text.length(); 2555 2556 if (mKeyListener != null) { 2557 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2558 } 2559 2560 if (mSpanController == null) { 2561 mSpanController = new SpanController(); 2562 } 2563 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2564 } 2565 2566 void setContextMenuAnchor(float x, float y) { 2567 mContextMenuAnchorX = x; 2568 mContextMenuAnchorY = y; 2569 } 2570 2571 void onCreateContextMenu(ContextMenu menu) { 2572 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2573 || Float.isNaN(mContextMenuAnchorY)) { 2574 return; 2575 } 2576 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2577 if (offset == -1) { 2578 return; 2579 } 2580 stopTextActionModeWithPreservingSelection(); 2581 final boolean isOnSelection = mTextView.hasSelection() 2582 && offset >= mTextView.getSelectionStart() && offset <= mTextView.getSelectionEnd(); 2583 if (!isOnSelection) { 2584 // Right clicked position is not on the selection. Remove the selection and move the 2585 // cursor to the right clicked position. 2586 Selection.setSelection((Spannable) mTextView.getText(), offset); 2587 stopTextActionMode(); 2588 } 2589 2590 if (shouldOfferToShowSuggestions()) { 2591 final SuggestionInfo[] suggestionInfoArray = 2592 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2593 for (int i = 0; i < suggestionInfoArray.length; i++) { 2594 suggestionInfoArray[i] = new SuggestionInfo(); 2595 } 2596 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2597 com.android.internal.R.string.replace); 2598 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2599 for (int i = 0; i < numItems; i++) { 2600 final SuggestionInfo info = suggestionInfoArray[i]; 2601 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2602 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2603 @Override 2604 public boolean onMenuItemClick(MenuItem item) { 2605 replaceWithSuggestion(info); 2606 return true; 2607 } 2608 }); 2609 } 2610 } 2611 2612 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2613 com.android.internal.R.string.undo) 2614 .setAlphabeticShortcut('z') 2615 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2616 .setEnabled(mTextView.canUndo()); 2617 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2618 com.android.internal.R.string.redo) 2619 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2620 .setEnabled(mTextView.canRedo()); 2621 2622 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2623 com.android.internal.R.string.cut) 2624 .setAlphabeticShortcut('x') 2625 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2626 .setEnabled(mTextView.canCut()); 2627 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2628 com.android.internal.R.string.copy) 2629 .setAlphabeticShortcut('c') 2630 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2631 .setEnabled(mTextView.canCopy()); 2632 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2633 com.android.internal.R.string.paste) 2634 .setAlphabeticShortcut('v') 2635 .setEnabled(mTextView.canPaste()) 2636 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2637 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2638 com.android.internal.R.string.paste_as_plain_text) 2639 .setEnabled(mTextView.canPaste()) 2640 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2641 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2642 com.android.internal.R.string.share) 2643 .setEnabled(mTextView.canShare()) 2644 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2645 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2646 com.android.internal.R.string.selectAll) 2647 .setAlphabeticShortcut('a') 2648 .setEnabled(mTextView.canSelectAllText()) 2649 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2650 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2651 com.android.internal.R.string.autofill) 2652 .setEnabled(mTextView.canRequestAutofill()) 2653 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2654 2655 mPreserveSelection = true; 2656 } 2657 2658 @Nullable 2659 private SuggestionSpan findEquivalentSuggestionSpan( 2660 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2661 final Editable editable = (Editable) mTextView.getText(); 2662 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2663 // Exactly same span is found. 2664 return suggestionSpanInfo.mSuggestionSpan; 2665 } 2666 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2667 // contents. 2668 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2669 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2670 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2671 final int start = editable.getSpanStart(suggestionSpan); 2672 if (start != suggestionSpanInfo.mSpanStart) { 2673 continue; 2674 } 2675 final int end = editable.getSpanEnd(suggestionSpan); 2676 if (end != suggestionSpanInfo.mSpanEnd) { 2677 continue; 2678 } 2679 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2680 return suggestionSpan; 2681 } 2682 } 2683 return null; 2684 } 2685 2686 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2687 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2688 suggestionInfo.mSuggestionSpanInfo); 2689 if (targetSuggestionSpan == null) { 2690 // Span has been removed 2691 return; 2692 } 2693 final Editable editable = (Editable) mTextView.getText(); 2694 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2695 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2696 if (spanStart < 0 || spanEnd <= spanStart) { 2697 // Span has been removed 2698 return; 2699 } 2700 2701 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2702 // SuggestionSpans are removed by replace: save them before 2703 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2704 SuggestionSpan.class); 2705 final int length = suggestionSpans.length; 2706 int[] suggestionSpansStarts = new int[length]; 2707 int[] suggestionSpansEnds = new int[length]; 2708 int[] suggestionSpansFlags = new int[length]; 2709 for (int i = 0; i < length; i++) { 2710 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2711 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2712 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2713 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2714 2715 // Remove potential misspelled flags 2716 int suggestionSpanFlags = suggestionSpan.getFlags(); 2717 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2718 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2719 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2720 suggestionSpan.setFlags(suggestionSpanFlags); 2721 } 2722 } 2723 2724 // Notify source IME of the suggestion pick. Do this before swapping texts. 2725 targetSuggestionSpan.notifySelection( 2726 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2727 2728 // Swap text content between actual text and Suggestion span 2729 final int suggestionStart = suggestionInfo.mSuggestionStart; 2730 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2731 final String suggestion = suggestionInfo.mText.subSequence( 2732 suggestionStart, suggestionEnd).toString(); 2733 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2734 2735 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2736 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2737 2738 // Restore previous SuggestionSpans 2739 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2740 for (int i = 0; i < length; i++) { 2741 // Only spans that include the modified region make sense after replacement 2742 // Spans partially included in the replaced region are removed, there is no 2743 // way to assign them a valid range after replacement 2744 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2745 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2746 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2747 } 2748 } 2749 // Move cursor at the end of the replaced word 2750 final int newCursorPosition = spanEnd + lengthDelta; 2751 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2752 } 2753 2754 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2755 new MenuItem.OnMenuItemClickListener() { 2756 @Override 2757 public boolean onMenuItemClick(MenuItem item) { 2758 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2759 return true; 2760 } 2761 return mTextView.onTextContextMenuItem(item.getItemId()); 2762 } 2763 }; 2764 2765 /** 2766 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2767 * pop-up should be displayed. 2768 * Also monitors {@link Selection} to call back to the attached input method. 2769 */ 2770 private class SpanController implements SpanWatcher { 2771 2772 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2773 2774 private EasyEditPopupWindow mPopupWindow; 2775 2776 private Runnable mHidePopup; 2777 2778 // This function is pure but inner classes can't have static functions 2779 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2780 final Object span) { 2781 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2782 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2783 } 2784 2785 @Override 2786 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2787 if (isNonIntermediateSelectionSpan(text, span)) { 2788 sendUpdateSelection(); 2789 } else if (span instanceof EasyEditSpan) { 2790 if (mPopupWindow == null) { 2791 mPopupWindow = new EasyEditPopupWindow(); 2792 mHidePopup = new Runnable() { 2793 @Override 2794 public void run() { 2795 hide(); 2796 } 2797 }; 2798 } 2799 2800 // Make sure there is only at most one EasyEditSpan in the text 2801 if (mPopupWindow.mEasyEditSpan != null) { 2802 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2803 } 2804 2805 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2806 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2807 @Override 2808 public void onDeleteClick(EasyEditSpan span) { 2809 Editable editable = (Editable) mTextView.getText(); 2810 int start = editable.getSpanStart(span); 2811 int end = editable.getSpanEnd(span); 2812 if (start >= 0 && end >= 0) { 2813 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2814 mTextView.deleteText_internal(start, end); 2815 } 2816 editable.removeSpan(span); 2817 } 2818 }); 2819 2820 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2821 // The window is not visible yet, ignore the text change. 2822 return; 2823 } 2824 2825 if (mTextView.getLayout() == null) { 2826 // The view has not been laid out yet, ignore the text change 2827 return; 2828 } 2829 2830 if (extractedTextModeWillBeStarted()) { 2831 // The input is in extract mode. Do not handle the easy edit in 2832 // the original TextView, as the ExtractEditText will do 2833 return; 2834 } 2835 2836 mPopupWindow.show(); 2837 mTextView.removeCallbacks(mHidePopup); 2838 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2839 } 2840 } 2841 2842 @Override 2843 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2844 if (isNonIntermediateSelectionSpan(text, span)) { 2845 sendUpdateSelection(); 2846 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2847 hide(); 2848 } 2849 } 2850 2851 @Override 2852 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2853 int newStart, int newEnd) { 2854 if (isNonIntermediateSelectionSpan(text, span)) { 2855 sendUpdateSelection(); 2856 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2857 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2858 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2859 text.removeSpan(easyEditSpan); 2860 } 2861 } 2862 2863 public void hide() { 2864 if (mPopupWindow != null) { 2865 mPopupWindow.hide(); 2866 mTextView.removeCallbacks(mHidePopup); 2867 } 2868 } 2869 2870 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2871 try { 2872 PendingIntent pendingIntent = span.getPendingIntent(); 2873 if (pendingIntent != null) { 2874 Intent intent = new Intent(); 2875 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2876 pendingIntent.send(mTextView.getContext(), 0, intent); 2877 } 2878 } catch (CanceledException e) { 2879 // This should not happen, as we should try to send the intent only once. 2880 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2881 } 2882 } 2883 } 2884 2885 /** 2886 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2887 */ 2888 private interface EasyEditDeleteListener { 2889 2890 /** 2891 * Clicks the delete pop-up. 2892 */ 2893 void onDeleteClick(EasyEditSpan span); 2894 } 2895 2896 /** 2897 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2898 * by {@link SpanController}. 2899 */ 2900 private class EasyEditPopupWindow extends PinnedPopupWindow 2901 implements OnClickListener { 2902 private static final int POPUP_TEXT_LAYOUT = 2903 com.android.internal.R.layout.text_edit_action_popup_text; 2904 private TextView mDeleteTextView; 2905 private EasyEditSpan mEasyEditSpan; 2906 private EasyEditDeleteListener mOnDeleteListener; 2907 2908 @Override 2909 protected void createPopupWindow() { 2910 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2911 com.android.internal.R.attr.textSelectHandleWindowStyle); 2912 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2913 mPopupWindow.setClippingEnabled(true); 2914 } 2915 2916 @Override 2917 protected void initContentView() { 2918 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2919 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2920 mContentView = linearLayout; 2921 mContentView.setBackgroundResource( 2922 com.android.internal.R.drawable.text_edit_side_paste_window); 2923 2924 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 2925 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2926 2927 LayoutParams wrapContent = new LayoutParams( 2928 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2929 2930 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2931 mDeleteTextView.setLayoutParams(wrapContent); 2932 mDeleteTextView.setText(com.android.internal.R.string.delete); 2933 mDeleteTextView.setOnClickListener(this); 2934 mContentView.addView(mDeleteTextView); 2935 } 2936 2937 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2938 mEasyEditSpan = easyEditSpan; 2939 } 2940 2941 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2942 mOnDeleteListener = listener; 2943 } 2944 2945 @Override 2946 public void onClick(View view) { 2947 if (view == mDeleteTextView 2948 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2949 && mOnDeleteListener != null) { 2950 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2951 } 2952 } 2953 2954 @Override 2955 public void hide() { 2956 if (mEasyEditSpan != null) { 2957 mEasyEditSpan.setDeleteEnabled(false); 2958 } 2959 mOnDeleteListener = null; 2960 super.hide(); 2961 } 2962 2963 @Override 2964 protected int getTextOffset() { 2965 // Place the pop-up at the end of the span 2966 Editable editable = (Editable) mTextView.getText(); 2967 return editable.getSpanEnd(mEasyEditSpan); 2968 } 2969 2970 @Override 2971 protected int getVerticalLocalPosition(int line) { 2972 return mTextView.getLayout().getLineBottom(line); 2973 } 2974 2975 @Override 2976 protected int clipVertically(int positionY) { 2977 // As we display the pop-up below the span, no vertical clipping is required. 2978 return positionY; 2979 } 2980 } 2981 2982 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2983 // 3 handles 2984 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2985 // 1 CursorAnchorInfoNotifier 2986 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2987 private TextViewPositionListener[] mPositionListeners = 2988 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2989 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2990 private boolean mPositionHasChanged = true; 2991 // Absolute position of the TextView with respect to its parent window 2992 private int mPositionX, mPositionY; 2993 private int mPositionXOnScreen, mPositionYOnScreen; 2994 private int mNumberOfListeners; 2995 private boolean mScrollHasChanged; 2996 final int[] mTempCoords = new int[2]; 2997 2998 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2999 if (mNumberOfListeners == 0) { 3000 updatePosition(); 3001 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3002 vto.addOnPreDrawListener(this); 3003 } 3004 3005 int emptySlotIndex = -1; 3006 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3007 TextViewPositionListener listener = mPositionListeners[i]; 3008 if (listener == positionListener) { 3009 return; 3010 } else if (emptySlotIndex < 0 && listener == null) { 3011 emptySlotIndex = i; 3012 } 3013 } 3014 3015 mPositionListeners[emptySlotIndex] = positionListener; 3016 mCanMove[emptySlotIndex] = canMove; 3017 mNumberOfListeners++; 3018 } 3019 3020 public void removeSubscriber(TextViewPositionListener positionListener) { 3021 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3022 if (mPositionListeners[i] == positionListener) { 3023 mPositionListeners[i] = null; 3024 mNumberOfListeners--; 3025 break; 3026 } 3027 } 3028 3029 if (mNumberOfListeners == 0) { 3030 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3031 vto.removeOnPreDrawListener(this); 3032 } 3033 } 3034 3035 public int getPositionX() { 3036 return mPositionX; 3037 } 3038 3039 public int getPositionY() { 3040 return mPositionY; 3041 } 3042 3043 public int getPositionXOnScreen() { 3044 return mPositionXOnScreen; 3045 } 3046 3047 public int getPositionYOnScreen() { 3048 return mPositionYOnScreen; 3049 } 3050 3051 @Override 3052 public boolean onPreDraw() { 3053 updatePosition(); 3054 3055 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3056 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3057 TextViewPositionListener positionListener = mPositionListeners[i]; 3058 if (positionListener != null) { 3059 positionListener.updatePosition(mPositionX, mPositionY, 3060 mPositionHasChanged, mScrollHasChanged); 3061 } 3062 } 3063 } 3064 3065 mScrollHasChanged = false; 3066 return true; 3067 } 3068 3069 private void updatePosition() { 3070 mTextView.getLocationInWindow(mTempCoords); 3071 3072 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3073 3074 mPositionX = mTempCoords[0]; 3075 mPositionY = mTempCoords[1]; 3076 3077 mTextView.getLocationOnScreen(mTempCoords); 3078 3079 mPositionXOnScreen = mTempCoords[0]; 3080 mPositionYOnScreen = mTempCoords[1]; 3081 } 3082 3083 public void onScrollChanged() { 3084 mScrollHasChanged = true; 3085 } 3086 } 3087 3088 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3089 protected PopupWindow mPopupWindow; 3090 protected ViewGroup mContentView; 3091 int mPositionX, mPositionY; 3092 int mClippingLimitLeft, mClippingLimitRight; 3093 3094 protected abstract void createPopupWindow(); 3095 protected abstract void initContentView(); 3096 protected abstract int getTextOffset(); 3097 protected abstract int getVerticalLocalPosition(int line); 3098 protected abstract int clipVertically(int positionY); 3099 protected void setUp() { 3100 } 3101 3102 public PinnedPopupWindow() { 3103 // Due to calling subclass methods in base constructor, subclass constructor is not 3104 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3105 // a chance to initialize subclasses, call setUp() method here. 3106 // TODO: It is good to extract non trivial initialization code from constructor. 3107 setUp(); 3108 3109 createPopupWindow(); 3110 3111 mPopupWindow.setWindowLayoutType( 3112 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3113 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3114 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3115 3116 initContentView(); 3117 3118 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3119 ViewGroup.LayoutParams.WRAP_CONTENT); 3120 mContentView.setLayoutParams(wrapContent); 3121 3122 mPopupWindow.setContentView(mContentView); 3123 } 3124 3125 public void show() { 3126 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3127 3128 computeLocalPosition(); 3129 3130 final PositionListener positionListener = getPositionListener(); 3131 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3132 } 3133 3134 protected void measureContent() { 3135 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3136 mContentView.measure( 3137 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3138 View.MeasureSpec.AT_MOST), 3139 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3140 View.MeasureSpec.AT_MOST)); 3141 } 3142 3143 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3144 * positioned according to viewportToContentHorizontalOffset. 3145 * 3146 * This method assumes that mContentView has properly been measured from its content. */ 3147 private void computeLocalPosition() { 3148 measureContent(); 3149 final int width = mContentView.getMeasuredWidth(); 3150 final int offset = getTextOffset(); 3151 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3152 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3153 3154 final int line = mTextView.getLayout().getLineForOffset(offset); 3155 mPositionY = getVerticalLocalPosition(line); 3156 mPositionY += mTextView.viewportToContentVerticalOffset(); 3157 } 3158 3159 private void updatePosition(int parentPositionX, int parentPositionY) { 3160 int positionX = parentPositionX + mPositionX; 3161 int positionY = parentPositionY + mPositionY; 3162 3163 positionY = clipVertically(positionY); 3164 3165 // Horizontal clipping 3166 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3167 final int width = mContentView.getMeasuredWidth(); 3168 positionX = Math.min( 3169 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3170 positionX = Math.max(-mClippingLimitLeft, positionX); 3171 3172 if (isShowing()) { 3173 mPopupWindow.update(positionX, positionY, -1, -1); 3174 } else { 3175 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3176 positionX, positionY); 3177 } 3178 } 3179 3180 public void hide() { 3181 if (!isShowing()) { 3182 return; 3183 } 3184 mPopupWindow.dismiss(); 3185 getPositionListener().removeSubscriber(this); 3186 } 3187 3188 @Override 3189 public void updatePosition(int parentPositionX, int parentPositionY, 3190 boolean parentPositionChanged, boolean parentScrolled) { 3191 // Either parentPositionChanged or parentScrolled is true, check if still visible 3192 if (isShowing() && isOffsetVisible(getTextOffset())) { 3193 if (parentScrolled) computeLocalPosition(); 3194 updatePosition(parentPositionX, parentPositionY); 3195 } else { 3196 hide(); 3197 } 3198 } 3199 3200 public boolean isShowing() { 3201 return mPopupWindow.isShowing(); 3202 } 3203 } 3204 3205 private static final class SuggestionInfo { 3206 // Range of actual suggestion within mText 3207 int mSuggestionStart, mSuggestionEnd; 3208 3209 // The SuggestionSpan that this TextView represents 3210 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3211 3212 // The index of this suggestion inside suggestionSpan 3213 int mSuggestionIndex; 3214 3215 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3216 3217 void clear() { 3218 mSuggestionSpanInfo.clear(); 3219 mText.clear(); 3220 } 3221 3222 // Utility method to set attributes about a SuggestionSpan. 3223 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3224 mSuggestionSpanInfo.mSuggestionSpan = span; 3225 mSuggestionSpanInfo.mSpanStart = spanStart; 3226 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3227 } 3228 } 3229 3230 private static final class SuggestionSpanInfo { 3231 // The SuggestionSpan; 3232 @Nullable 3233 SuggestionSpan mSuggestionSpan; 3234 3235 // The SuggestionSpan start position 3236 int mSpanStart; 3237 3238 // The SuggestionSpan end position 3239 int mSpanEnd; 3240 3241 void clear() { 3242 mSuggestionSpan = null; 3243 } 3244 } 3245 3246 private class SuggestionHelper { 3247 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3248 new SuggestionSpanComparator(); 3249 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3250 new HashMap<SuggestionSpan, Integer>(); 3251 3252 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3253 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3254 final int flag1 = span1.getFlags(); 3255 final int flag2 = span2.getFlags(); 3256 if (flag1 != flag2) { 3257 // The order here should match what is used in updateDrawState 3258 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3259 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3260 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3261 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3262 if (easy1 && !misspelled1) return -1; 3263 if (easy2 && !misspelled2) return 1; 3264 if (misspelled1) return -1; 3265 if (misspelled2) return 1; 3266 } 3267 3268 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3269 } 3270 } 3271 3272 /** 3273 * Returns the suggestion spans that cover the current cursor position. The suggestion 3274 * spans are sorted according to the length of text that they are attached to. 3275 */ 3276 private SuggestionSpan[] getSortedSuggestionSpans() { 3277 int pos = mTextView.getSelectionStart(); 3278 Spannable spannable = (Spannable) mTextView.getText(); 3279 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3280 3281 mSpansLengths.clear(); 3282 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3283 int start = spannable.getSpanStart(suggestionSpan); 3284 int end = spannable.getSpanEnd(suggestionSpan); 3285 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3286 } 3287 3288 // The suggestions are sorted according to their types (easy correction first, then 3289 // misspelled) and to the length of the text that they cover (shorter first). 3290 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3291 mSpansLengths.clear(); 3292 3293 return suggestionSpans; 3294 } 3295 3296 /** 3297 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3298 * position. 3299 * 3300 * @param suggestionInfos SuggestionInfo array the results will be set. 3301 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3302 * @return the number of suggestions actually fetched. 3303 */ 3304 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3305 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3306 final Spannable spannable = (Spannable) mTextView.getText(); 3307 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3308 final int nbSpans = suggestionSpans.length; 3309 if (nbSpans == 0) return 0; 3310 3311 int numberOfSuggestions = 0; 3312 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3313 final int spanStart = spannable.getSpanStart(suggestionSpan); 3314 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3315 3316 if (misspelledSpanInfo != null 3317 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3318 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3319 misspelledSpanInfo.mSpanStart = spanStart; 3320 misspelledSpanInfo.mSpanEnd = spanEnd; 3321 } 3322 3323 final String[] suggestions = suggestionSpan.getSuggestions(); 3324 final int nbSuggestions = suggestions.length; 3325 suggestionLoop: 3326 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3327 final String suggestion = suggestions[suggestionIndex]; 3328 for (int i = 0; i < numberOfSuggestions; i++) { 3329 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3330 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3331 final int otherSpanStart = 3332 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3333 final int otherSpanEnd = 3334 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3335 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3336 continue suggestionLoop; 3337 } 3338 } 3339 } 3340 3341 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3342 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3343 suggestionInfo.mSuggestionIndex = suggestionIndex; 3344 suggestionInfo.mSuggestionStart = 0; 3345 suggestionInfo.mSuggestionEnd = suggestion.length(); 3346 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3347 numberOfSuggestions++; 3348 if (numberOfSuggestions >= suggestionInfos.length) { 3349 return numberOfSuggestions; 3350 } 3351 } 3352 } 3353 return numberOfSuggestions; 3354 } 3355 } 3356 3357 @VisibleForTesting 3358 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3359 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3360 3361 // Key of intent extras for inserting new word into user dictionary. 3362 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3363 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3364 3365 private SuggestionInfo[] mSuggestionInfos; 3366 private int mNumberOfSuggestions; 3367 private boolean mCursorWasVisibleBeforeSuggestions; 3368 private boolean mIsShowingUp = false; 3369 private SuggestionAdapter mSuggestionsAdapter; 3370 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3371 private TextView mAddToDictionaryButton; 3372 private TextView mDeleteButton; 3373 private ListView mSuggestionListView; 3374 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3375 private int mContainerMarginWidth; 3376 private int mContainerMarginTop; 3377 private LinearLayout mContainerView; 3378 private Context mContext; // TODO: Make mContext final. 3379 3380 private class CustomPopupWindow extends PopupWindow { 3381 3382 @Override 3383 public void dismiss() { 3384 if (!isShowing()) { 3385 return; 3386 } 3387 super.dismiss(); 3388 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3389 3390 // Safe cast since show() checks that mTextView.getText() is an Editable 3391 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3392 3393 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3394 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3395 getInsertionController().show(); 3396 } 3397 } 3398 } 3399 3400 public SuggestionsPopupWindow() { 3401 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3402 } 3403 3404 @Override 3405 protected void setUp() { 3406 mContext = applyDefaultTheme(mTextView.getContext()); 3407 mHighlightSpan = new TextAppearanceSpan(mContext, 3408 mTextView.mTextEditSuggestionHighlightStyle); 3409 } 3410 3411 private Context applyDefaultTheme(Context originalContext) { 3412 TypedArray a = originalContext.obtainStyledAttributes( 3413 new int[]{com.android.internal.R.attr.isLightTheme}); 3414 boolean isLightTheme = a.getBoolean(0, true); 3415 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3416 : R.style.ThemeOverlay_Material_Dark; 3417 a.recycle(); 3418 return new ContextThemeWrapper(originalContext, themeId); 3419 } 3420 3421 @Override 3422 protected void createPopupWindow() { 3423 mPopupWindow = new CustomPopupWindow(); 3424 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3425 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3426 mPopupWindow.setFocusable(true); 3427 mPopupWindow.setClippingEnabled(false); 3428 } 3429 3430 @Override 3431 protected void initContentView() { 3432 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3433 Context.LAYOUT_INFLATER_SERVICE); 3434 mContentView = (ViewGroup) inflater.inflate( 3435 mTextView.mTextEditSuggestionContainerLayout, null); 3436 3437 mContainerView = (LinearLayout) mContentView.findViewById( 3438 com.android.internal.R.id.suggestionWindowContainer); 3439 ViewGroup.MarginLayoutParams lp = 3440 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3441 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3442 mContainerMarginTop = lp.topMargin; 3443 mClippingLimitLeft = lp.leftMargin; 3444 mClippingLimitRight = lp.rightMargin; 3445 3446 mSuggestionListView = (ListView) mContentView.findViewById( 3447 com.android.internal.R.id.suggestionContainer); 3448 3449 mSuggestionsAdapter = new SuggestionAdapter(); 3450 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3451 mSuggestionListView.setOnItemClickListener(this); 3452 3453 // Inflate the suggestion items once and for all. 3454 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3455 for (int i = 0; i < mSuggestionInfos.length; i++) { 3456 mSuggestionInfos[i] = new SuggestionInfo(); 3457 } 3458 3459 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3460 com.android.internal.R.id.addToDictionaryButton); 3461 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3462 public void onClick(View v) { 3463 final SuggestionSpan misspelledSpan = 3464 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3465 if (misspelledSpan == null) { 3466 // Span has been removed. 3467 return; 3468 } 3469 final Editable editable = (Editable) mTextView.getText(); 3470 final int spanStart = editable.getSpanStart(misspelledSpan); 3471 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3472 if (spanStart < 0 || spanEnd <= spanStart) { 3473 return; 3474 } 3475 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3476 3477 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3478 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3479 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3480 mTextView.getTextServicesLocale().toString()); 3481 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3482 mTextView.getContext().startActivity(intent); 3483 // There is no way to know if the word was indeed added. Re-check. 3484 // TODO The ExtractEditText should remove the span in the original text instead 3485 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3486 Selection.setSelection(editable, spanEnd); 3487 updateSpellCheckSpans(spanStart, spanEnd, false); 3488 hideWithCleanUp(); 3489 } 3490 }); 3491 3492 mDeleteButton = (TextView) mContentView.findViewById( 3493 com.android.internal.R.id.deleteButton); 3494 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3495 public void onClick(View v) { 3496 final Editable editable = (Editable) mTextView.getText(); 3497 3498 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3499 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3500 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3501 // Do not leave two adjacent spaces after deletion, or one at beginning of 3502 // text 3503 if (spanUnionEnd < editable.length() 3504 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3505 && (spanUnionStart == 0 3506 || Character.isSpaceChar( 3507 editable.charAt(spanUnionStart - 1)))) { 3508 spanUnionEnd = spanUnionEnd + 1; 3509 } 3510 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3511 } 3512 hideWithCleanUp(); 3513 } 3514 }); 3515 3516 } 3517 3518 public boolean isShowingUp() { 3519 return mIsShowingUp; 3520 } 3521 3522 public void onParentLostFocus() { 3523 mIsShowingUp = false; 3524 } 3525 3526 private class SuggestionAdapter extends BaseAdapter { 3527 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3528 Context.LAYOUT_INFLATER_SERVICE); 3529 3530 @Override 3531 public int getCount() { 3532 return mNumberOfSuggestions; 3533 } 3534 3535 @Override 3536 public Object getItem(int position) { 3537 return mSuggestionInfos[position]; 3538 } 3539 3540 @Override 3541 public long getItemId(int position) { 3542 return position; 3543 } 3544 3545 @Override 3546 public View getView(int position, View convertView, ViewGroup parent) { 3547 TextView textView = (TextView) convertView; 3548 3549 if (textView == null) { 3550 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3551 parent, false); 3552 } 3553 3554 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3555 textView.setText(suggestionInfo.mText); 3556 return textView; 3557 } 3558 } 3559 3560 @VisibleForTesting 3561 public ViewGroup getContentViewForTesting() { 3562 return mContentView; 3563 } 3564 3565 @Override 3566 public void show() { 3567 if (!(mTextView.getText() instanceof Editable)) return; 3568 if (extractedTextModeWillBeStarted()) { 3569 return; 3570 } 3571 3572 if (updateSuggestions()) { 3573 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3574 mTextView.setCursorVisible(false); 3575 mIsShowingUp = true; 3576 super.show(); 3577 } 3578 } 3579 3580 @Override 3581 protected void measureContent() { 3582 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3583 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3584 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3585 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3586 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3587 3588 int width = 0; 3589 View view = null; 3590 for (int i = 0; i < mNumberOfSuggestions; i++) { 3591 view = mSuggestionsAdapter.getView(i, view, mContentView); 3592 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3593 view.measure(horizontalMeasure, verticalMeasure); 3594 width = Math.max(width, view.getMeasuredWidth()); 3595 } 3596 3597 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3598 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3599 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3600 } 3601 3602 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3603 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3604 3605 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3606 + mContainerMarginWidth; 3607 3608 // Enforce the width based on actual text widths 3609 mContentView.measure( 3610 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3611 verticalMeasure); 3612 3613 Drawable popupBackground = mPopupWindow.getBackground(); 3614 if (popupBackground != null) { 3615 if (mTempRect == null) mTempRect = new Rect(); 3616 popupBackground.getPadding(mTempRect); 3617 width += mTempRect.left + mTempRect.right; 3618 } 3619 mPopupWindow.setWidth(width); 3620 } 3621 3622 @Override 3623 protected int getTextOffset() { 3624 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3625 } 3626 3627 @Override 3628 protected int getVerticalLocalPosition(int line) { 3629 return mTextView.getLayout().getLineBottom(line) - mContainerMarginTop; 3630 } 3631 3632 @Override 3633 protected int clipVertically(int positionY) { 3634 final int height = mContentView.getMeasuredHeight(); 3635 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3636 return Math.min(positionY, displayMetrics.heightPixels - height); 3637 } 3638 3639 private void hideWithCleanUp() { 3640 for (final SuggestionInfo info : mSuggestionInfos) { 3641 info.clear(); 3642 } 3643 mMisspelledSpanInfo.clear(); 3644 hide(); 3645 } 3646 3647 private boolean updateSuggestions() { 3648 Spannable spannable = (Spannable) mTextView.getText(); 3649 mNumberOfSuggestions = 3650 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3651 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3652 return false; 3653 } 3654 3655 int spanUnionStart = mTextView.getText().length(); 3656 int spanUnionEnd = 0; 3657 3658 for (int i = 0; i < mNumberOfSuggestions; i++) { 3659 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3660 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3661 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3662 } 3663 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3664 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3665 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3666 } 3667 3668 for (int i = 0; i < mNumberOfSuggestions; i++) { 3669 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3670 } 3671 3672 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3673 int addToDictionaryButtonVisibility = View.GONE; 3674 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3675 if (mMisspelledSpanInfo.mSpanStart >= 0 3676 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3677 addToDictionaryButtonVisibility = View.VISIBLE; 3678 } 3679 } 3680 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3681 3682 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3683 final int underlineColor; 3684 if (mNumberOfSuggestions != 0) { 3685 underlineColor = 3686 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3687 } else { 3688 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3689 } 3690 3691 if (underlineColor == 0) { 3692 // Fallback on the default highlight color when the first span does not provide one 3693 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3694 } else { 3695 final float BACKGROUND_TRANSPARENCY = 0.4f; 3696 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3697 mSuggestionRangeSpan.setBackgroundColor( 3698 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3699 } 3700 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3701 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3702 3703 mSuggestionsAdapter.notifyDataSetChanged(); 3704 return true; 3705 } 3706 3707 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3708 int unionEnd) { 3709 final Spannable text = (Spannable) mTextView.getText(); 3710 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3711 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3712 3713 // Adjust the start/end of the suggestion span 3714 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3715 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3716 + suggestionInfo.mText.length(); 3717 3718 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3719 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3720 3721 // Add the text before and after the span. 3722 final String textAsString = text.toString(); 3723 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3724 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3725 } 3726 3727 @Override 3728 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3729 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3730 replaceWithSuggestion(suggestionInfo); 3731 hideWithCleanUp(); 3732 } 3733 } 3734 3735 /** 3736 * An ActionMode Callback class that is used to provide actions while in text insertion or 3737 * selection mode. 3738 * 3739 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3740 * actions, depending on which of these this TextView supports and the current selection. 3741 */ 3742 private class TextActionModeCallback extends ActionMode.Callback2 { 3743 private final Path mSelectionPath = new Path(); 3744 private final RectF mSelectionBounds = new RectF(); 3745 private final boolean mHasSelection; 3746 private final int mHandleHeight; 3747 3748 public TextActionModeCallback(boolean hasSelection) { 3749 mHasSelection = hasSelection; 3750 if (mHasSelection) { 3751 SelectionModifierCursorController selectionController = getSelectionController(); 3752 if (selectionController.mStartHandle == null) { 3753 // As these are for initializing selectionController, hide() must be called. 3754 selectionController.initDrawables(); 3755 selectionController.initHandles(); 3756 selectionController.hide(); 3757 } 3758 mHandleHeight = Math.max( 3759 mSelectHandleLeft.getMinimumHeight(), 3760 mSelectHandleRight.getMinimumHeight()); 3761 } else { 3762 InsertionPointCursorController insertionController = getInsertionController(); 3763 if (insertionController != null) { 3764 insertionController.getHandle(); 3765 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3766 } else { 3767 mHandleHeight = 0; 3768 } 3769 } 3770 } 3771 3772 @Override 3773 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3774 mode.setTitle(null); 3775 mode.setSubtitle(null); 3776 mode.setTitleOptionalHint(true); 3777 populateMenuWithItems(menu); 3778 updateAssistMenuItem(menu); 3779 3780 Callback customCallback = getCustomCallback(); 3781 if (customCallback != null) { 3782 if (!customCallback.onCreateActionMode(mode, menu)) { 3783 // The custom mode can choose to cancel the action mode, dismiss selection. 3784 Selection.setSelection((Spannable) mTextView.getText(), 3785 mTextView.getSelectionEnd()); 3786 return false; 3787 } 3788 } 3789 3790 if (mTextView.canProcessText()) { 3791 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3792 } 3793 3794 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3795 if (mHasSelection && !mTextView.hasTransientState()) { 3796 mTextView.setHasTransientState(true); 3797 } 3798 return true; 3799 } else { 3800 return false; 3801 } 3802 } 3803 3804 private Callback getCustomCallback() { 3805 return mHasSelection 3806 ? mCustomSelectionActionModeCallback 3807 : mCustomInsertionActionModeCallback; 3808 } 3809 3810 private void populateMenuWithItems(Menu menu) { 3811 if (mTextView.canCut()) { 3812 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3813 com.android.internal.R.string.cut) 3814 .setAlphabeticShortcut('x') 3815 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3816 } 3817 3818 if (mTextView.canCopy()) { 3819 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3820 com.android.internal.R.string.copy) 3821 .setAlphabeticShortcut('c') 3822 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3823 } 3824 3825 if (mTextView.canPaste()) { 3826 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3827 com.android.internal.R.string.paste) 3828 .setAlphabeticShortcut('v') 3829 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3830 } 3831 3832 if (mTextView.canShare()) { 3833 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3834 com.android.internal.R.string.share) 3835 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3836 } 3837 3838 if (mTextView.canRequestAutofill()) { 3839 final int mode = mTextView.getText().length() <= 0 3840 ? MenuItem.SHOW_AS_ACTION_IF_ROOM : MenuItem.SHOW_AS_ACTION_NEVER; 3841 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3842 com.android.internal.R.string.autofill) 3843 .setShowAsAction(mode); 3844 } 3845 3846 updateSelectAllItem(menu); 3847 updateReplaceItem(menu); 3848 } 3849 3850 @Override 3851 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3852 updateSelectAllItem(menu); 3853 updateReplaceItem(menu); 3854 updateAssistMenuItem(menu); 3855 3856 Callback customCallback = getCustomCallback(); 3857 if (customCallback != null) { 3858 return customCallback.onPrepareActionMode(mode, menu); 3859 } 3860 return true; 3861 } 3862 3863 private void updateSelectAllItem(Menu menu) { 3864 boolean canSelectAll = mTextView.canSelectAllText(); 3865 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3866 if (canSelectAll && !selectAllItemExists) { 3867 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3868 com.android.internal.R.string.selectAll) 3869 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3870 } else if (!canSelectAll && selectAllItemExists) { 3871 menu.removeItem(TextView.ID_SELECT_ALL); 3872 } 3873 } 3874 3875 private void updateReplaceItem(Menu menu) { 3876 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3877 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3878 if (canReplace && !replaceItemExists) { 3879 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3880 com.android.internal.R.string.replace) 3881 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3882 } else if (!canReplace && replaceItemExists) { 3883 menu.removeItem(TextView.ID_REPLACE); 3884 } 3885 } 3886 3887 private void updateAssistMenuItem(Menu menu) { 3888 menu.removeItem(TextView.ID_ASSIST); 3889 final TextClassification textClassification = 3890 getSelectionActionModeHelper().getTextClassification(); 3891 if (textClassification != null) { 3892 final Drawable icon = textClassification.getIcon(); 3893 final CharSequence label = textClassification.getLabel(); 3894 final OnClickListener onClickListener = 3895 textClassification.getOnClickListener(); 3896 final Intent intent = textClassification.getIntent(); 3897 if ((icon != null || !TextUtils.isEmpty(label)) 3898 && (onClickListener != null || intent != null)) { 3899 menu.add(TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, label) 3900 .setIcon(icon) 3901 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3902 mMetricsLogger.write( 3903 new LogMaker(MetricsEvent.TEXT_SELECTION_MENU_ITEM_ASSIST) 3904 .setType(MetricsEvent.TYPE_OPEN) 3905 .setSubtype(textClassification.getLogType())); 3906 } 3907 } 3908 } 3909 3910 @Override 3911 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3912 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3913 return true; 3914 } 3915 Callback customCallback = getCustomCallback(); 3916 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3917 return true; 3918 } 3919 final TextClassification textClassification = 3920 getSelectionActionModeHelper().getTextClassification(); 3921 if (TextView.ID_ASSIST == item.getItemId() && textClassification != null) { 3922 final OnClickListener onClickListener = 3923 textClassification.getOnClickListener(); 3924 if (onClickListener != null) { 3925 onClickListener.onClick(mTextView); 3926 } else { 3927 final Intent intent = textClassification.getIntent(); 3928 if (intent != null) { 3929 TextClassification.createStartActivityOnClickListener( 3930 mTextView.getContext(), intent) 3931 .onClick(mTextView); 3932 } 3933 } 3934 mMetricsLogger.action( 3935 MetricsEvent.ACTION_TEXT_SELECTION_MENU_ITEM_ASSIST, 3936 textClassification.getLogType()); 3937 stopTextActionMode(); 3938 return true; 3939 } 3940 return mTextView.onTextContextMenuItem(item.getItemId()); 3941 } 3942 3943 @Override 3944 public void onDestroyActionMode(ActionMode mode) { 3945 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3946 getSelectionActionModeHelper().onDestroyActionMode(); 3947 mTextActionMode = null; 3948 Callback customCallback = getCustomCallback(); 3949 if (customCallback != null) { 3950 customCallback.onDestroyActionMode(mode); 3951 } 3952 3953 if (!mPreserveSelection) { 3954 /* 3955 * Leave current selection when we tentatively destroy action mode for the 3956 * selection. If we're detaching from a window, we'll bring back the selection 3957 * mode when (if) we get reattached. 3958 */ 3959 Selection.setSelection((Spannable) mTextView.getText(), 3960 mTextView.getSelectionEnd()); 3961 } 3962 3963 if (mSelectionModifierCursorController != null) { 3964 mSelectionModifierCursorController.hide(); 3965 } 3966 } 3967 3968 @Override 3969 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3970 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3971 super.onGetContentRect(mode, view, outRect); 3972 return; 3973 } 3974 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3975 // We have a selection. 3976 mSelectionPath.reset(); 3977 mTextView.getLayout().getSelectionPath( 3978 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3979 mSelectionPath.computeBounds(mSelectionBounds, true); 3980 mSelectionBounds.bottom += mHandleHeight; 3981 } else if (mCursorCount == 2) { 3982 // We have a split cursor. In this case, we take the rectangle that includes both 3983 // parts of the cursor to ensure we don't obscure either of them. 3984 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3985 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3986 mSelectionBounds.set( 3987 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3988 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3989 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3990 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3991 + mHandleHeight); 3992 } else { 3993 // We have a single cursor. 3994 Layout layout = mTextView.getLayout(); 3995 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 3996 float primaryHorizontal = clampHorizontalPosition(null, 3997 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 3998 mSelectionBounds.set( 3999 primaryHorizontal, 4000 layout.getLineTop(line), 4001 primaryHorizontal, 4002 layout.getLineTop(line + 1) + mHandleHeight); 4003 } 4004 // Take TextView's padding and scroll into account. 4005 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4006 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4007 outRect.set( 4008 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4009 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4010 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4011 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4012 } 4013 } 4014 4015 /** 4016 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4017 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4018 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4019 */ 4020 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4021 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4022 final int[] mTmpIntOffset = new int[2]; 4023 final Matrix mViewToScreenMatrix = new Matrix(); 4024 4025 @Override 4026 public void updatePosition(int parentPositionX, int parentPositionY, 4027 boolean parentPositionChanged, boolean parentScrolled) { 4028 final InputMethodState ims = mInputMethodState; 4029 if (ims == null || ims.mBatchEditNesting > 0) { 4030 return; 4031 } 4032 final InputMethodManager imm = InputMethodManager.peekInstance(); 4033 if (null == imm) { 4034 return; 4035 } 4036 if (!imm.isActive(mTextView)) { 4037 return; 4038 } 4039 // Skip if the IME has not requested the cursor/anchor position. 4040 if (!imm.isCursorAnchorInfoEnabled()) { 4041 return; 4042 } 4043 Layout layout = mTextView.getLayout(); 4044 if (layout == null) { 4045 return; 4046 } 4047 4048 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4049 builder.reset(); 4050 4051 final int selectionStart = mTextView.getSelectionStart(); 4052 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4053 4054 // Construct transformation matrix from view local coordinates to screen coordinates. 4055 mViewToScreenMatrix.set(mTextView.getMatrix()); 4056 mTextView.getLocationOnScreen(mTmpIntOffset); 4057 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4058 builder.setMatrix(mViewToScreenMatrix); 4059 4060 final float viewportToContentHorizontalOffset = 4061 mTextView.viewportToContentHorizontalOffset(); 4062 final float viewportToContentVerticalOffset = 4063 mTextView.viewportToContentVerticalOffset(); 4064 4065 final CharSequence text = mTextView.getText(); 4066 if (text instanceof Spannable) { 4067 final Spannable sp = (Spannable) text; 4068 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4069 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4070 if (composingTextEnd < composingTextStart) { 4071 final int temp = composingTextEnd; 4072 composingTextEnd = composingTextStart; 4073 composingTextStart = temp; 4074 } 4075 final boolean hasComposingText = 4076 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4077 if (hasComposingText) { 4078 final CharSequence composingText = text.subSequence(composingTextStart, 4079 composingTextEnd); 4080 builder.setComposingText(composingTextStart, composingText); 4081 mTextView.populateCharacterBounds(builder, composingTextStart, 4082 composingTextEnd, viewportToContentHorizontalOffset, 4083 viewportToContentVerticalOffset); 4084 } 4085 } 4086 4087 // Treat selectionStart as the insertion point. 4088 if (0 <= selectionStart) { 4089 final int offset = selectionStart; 4090 final int line = layout.getLineForOffset(offset); 4091 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4092 + viewportToContentHorizontalOffset; 4093 final float insertionMarkerTop = layout.getLineTop(line) 4094 + viewportToContentVerticalOffset; 4095 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4096 + viewportToContentVerticalOffset; 4097 final float insertionMarkerBottom = layout.getLineBottom(line) 4098 + viewportToContentVerticalOffset; 4099 final boolean isTopVisible = mTextView 4100 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4101 final boolean isBottomVisible = mTextView 4102 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4103 int insertionMarkerFlags = 0; 4104 if (isTopVisible || isBottomVisible) { 4105 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4106 } 4107 if (!isTopVisible || !isBottomVisible) { 4108 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4109 } 4110 if (layout.isRtlCharAt(offset)) { 4111 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4112 } 4113 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4114 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4115 } 4116 4117 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4118 } 4119 } 4120 4121 @VisibleForTesting 4122 public abstract class HandleView extends View implements TextViewPositionListener { 4123 protected Drawable mDrawable; 4124 protected Drawable mDrawableLtr; 4125 protected Drawable mDrawableRtl; 4126 private final PopupWindow mContainer; 4127 // Position with respect to the parent TextView 4128 private int mPositionX, mPositionY; 4129 private boolean mIsDragging; 4130 // Offset from touch position to mPosition 4131 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4132 protected int mHotspotX; 4133 protected int mHorizontalGravity; 4134 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4135 private float mTouchOffsetY; 4136 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4137 private float mIdealVerticalOffset; 4138 // Parent's (TextView) previous position in window 4139 private int mLastParentX, mLastParentY; 4140 // Parent's (TextView) previous position on screen 4141 private int mLastParentXOnScreen, mLastParentYOnScreen; 4142 // Previous text character offset 4143 protected int mPreviousOffset = -1; 4144 // Previous text character offset 4145 private boolean mPositionHasChanged = true; 4146 // Minimum touch target size for handles 4147 private int mMinSize; 4148 // Indicates the line of text that the handle is on. 4149 protected int mPrevLine = UNSET_LINE; 4150 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4151 // when selecting text when the handles jump to the end / start of words which may be on 4152 // a different line. 4153 protected int mPreviousLineTouched = UNSET_LINE; 4154 4155 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4156 super(mTextView.getContext()); 4157 setId(id); 4158 mContainer = new PopupWindow(mTextView.getContext(), null, 4159 com.android.internal.R.attr.textSelectHandleWindowStyle); 4160 mContainer.setSplitTouchEnabled(true); 4161 mContainer.setClippingEnabled(false); 4162 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4163 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4164 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4165 mContainer.setContentView(this); 4166 4167 mDrawableLtr = drawableLtr; 4168 mDrawableRtl = drawableRtl; 4169 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4170 com.android.internal.R.dimen.text_handle_min_size); 4171 4172 updateDrawable(); 4173 4174 final int handleHeight = getPreferredHeight(); 4175 mTouchOffsetY = -0.3f * handleHeight; 4176 mIdealVerticalOffset = 0.7f * handleHeight; 4177 } 4178 4179 public float getIdealVerticalOffset() { 4180 return mIdealVerticalOffset; 4181 } 4182 4183 protected void updateDrawable() { 4184 if (mIsDragging) { 4185 // Don't update drawable during dragging. 4186 return; 4187 } 4188 final Layout layout = mTextView.getLayout(); 4189 if (layout == null) { 4190 return; 4191 } 4192 final int offset = getCurrentCursorOffset(); 4193 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4194 final Drawable oldDrawable = mDrawable; 4195 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4196 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4197 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4198 if (oldDrawable != mDrawable && isShowing()) { 4199 // Update popup window position. 4200 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4201 - getHorizontalOffset() + getCursorOffset(); 4202 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4203 mPositionHasChanged = true; 4204 updatePosition(mLastParentX, mLastParentY, false, false); 4205 postInvalidate(); 4206 } 4207 } 4208 4209 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4210 protected abstract int getHorizontalGravity(boolean isRtlRun); 4211 4212 // Touch-up filter: number of previous positions remembered 4213 private static final int HISTORY_SIZE = 5; 4214 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4215 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4216 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4217 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4218 private int mPreviousOffsetIndex = 0; 4219 private int mNumberPreviousOffsets = 0; 4220 4221 private void startTouchUpFilter(int offset) { 4222 mNumberPreviousOffsets = 0; 4223 addPositionToTouchUpFilter(offset); 4224 } 4225 4226 private void addPositionToTouchUpFilter(int offset) { 4227 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4228 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4229 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4230 mNumberPreviousOffsets++; 4231 } 4232 4233 private void filterOnTouchUp() { 4234 final long now = SystemClock.uptimeMillis(); 4235 int i = 0; 4236 int index = mPreviousOffsetIndex; 4237 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4238 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4239 i++; 4240 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4241 } 4242 4243 if (i > 0 && i < iMax 4244 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4245 positionAtCursorOffset(mPreviousOffsets[index], false); 4246 } 4247 } 4248 4249 public boolean offsetHasBeenChanged() { 4250 return mNumberPreviousOffsets > 1; 4251 } 4252 4253 @Override 4254 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4255 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4256 } 4257 4258 @Override 4259 public void invalidate() { 4260 super.invalidate(); 4261 if (isShowing()) { 4262 positionAtCursorOffset(getCurrentCursorOffset(), true); 4263 } 4264 }; 4265 4266 private int getPreferredWidth() { 4267 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4268 } 4269 4270 private int getPreferredHeight() { 4271 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4272 } 4273 4274 public void show() { 4275 if (isShowing()) return; 4276 4277 getPositionListener().addSubscriber(this, true /* local position may change */); 4278 4279 // Make sure the offset is always considered new, even when focusing at same position 4280 mPreviousOffset = -1; 4281 positionAtCursorOffset(getCurrentCursorOffset(), false); 4282 } 4283 4284 protected void dismiss() { 4285 mIsDragging = false; 4286 mContainer.dismiss(); 4287 onDetached(); 4288 } 4289 4290 public void hide() { 4291 dismiss(); 4292 4293 getPositionListener().removeSubscriber(this); 4294 } 4295 4296 public boolean isShowing() { 4297 return mContainer.isShowing(); 4298 } 4299 4300 private boolean isVisible() { 4301 // Always show a dragging handle. 4302 if (mIsDragging) { 4303 return true; 4304 } 4305 4306 if (mTextView.isInBatchEditMode()) { 4307 return false; 4308 } 4309 4310 return mTextView.isPositionVisible( 4311 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4312 } 4313 4314 public abstract int getCurrentCursorOffset(); 4315 4316 protected abstract void updateSelection(int offset); 4317 4318 public abstract void updatePosition(float x, float y); 4319 4320 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4321 return layout.isRtlCharAt(offset); 4322 } 4323 4324 @VisibleForTesting 4325 public float getHorizontal(@NonNull Layout layout, int offset) { 4326 return layout.getPrimaryHorizontal(offset); 4327 } 4328 4329 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4330 return mTextView.getOffsetAtCoordinate(line, x); 4331 } 4332 4333 /** 4334 * @param offset Cursor offset. Must be in [-1, length]. 4335 * @param forceUpdatePosition whether to force update the position. This should be true 4336 * when If the parent has been scrolled, for example. 4337 */ 4338 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4339 // A HandleView relies on the layout, which may be nulled by external methods 4340 Layout layout = mTextView.getLayout(); 4341 if (layout == null) { 4342 // Will update controllers' state, hiding them and stopping selection mode if needed 4343 prepareCursorControllers(); 4344 return; 4345 } 4346 layout = mTextView.getLayout(); 4347 4348 boolean offsetChanged = offset != mPreviousOffset; 4349 if (offsetChanged || forceUpdatePosition) { 4350 if (offsetChanged) { 4351 updateSelection(offset); 4352 addPositionToTouchUpFilter(offset); 4353 } 4354 final int line = layout.getLineForOffset(offset); 4355 mPrevLine = line; 4356 4357 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4358 - getHorizontalOffset() + getCursorOffset(); 4359 mPositionY = layout.getLineBottom(line); 4360 4361 // Take TextView's padding and scroll into account. 4362 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4363 mPositionY += mTextView.viewportToContentVerticalOffset(); 4364 4365 mPreviousOffset = offset; 4366 mPositionHasChanged = true; 4367 } 4368 } 4369 4370 /** 4371 * Return the clamped horizontal position for the first cursor. 4372 * 4373 * @param layout Text layout. 4374 * @param offset Character offset for the cursor. 4375 * @return The clamped horizontal position for the cursor. 4376 */ 4377 int getCursorHorizontalPosition(Layout layout, int offset) { 4378 return (int) (getHorizontal(layout, offset) - 0.5f); 4379 } 4380 4381 @Override 4382 public void updatePosition(int parentPositionX, int parentPositionY, 4383 boolean parentPositionChanged, boolean parentScrolled) { 4384 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 4385 if (parentPositionChanged || mPositionHasChanged) { 4386 if (mIsDragging) { 4387 // Update touchToWindow offset in case of parent scrolling while dragging 4388 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4389 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4390 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4391 mLastParentX = parentPositionX; 4392 mLastParentY = parentPositionY; 4393 } 4394 4395 onHandleMoved(); 4396 } 4397 4398 if (isVisible()) { 4399 // Transform to the window coordinates to follow the view tranformation. 4400 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4401 mTextView.transformFromViewToWindowSpace(pts); 4402 pts[0] -= mHotspotX + getHorizontalOffset(); 4403 4404 if (isShowing()) { 4405 mContainer.update(pts[0], pts[1], -1, -1); 4406 } else { 4407 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4408 } 4409 } else { 4410 if (isShowing()) { 4411 dismiss(); 4412 } 4413 } 4414 4415 mPositionHasChanged = false; 4416 } 4417 } 4418 4419 @Override 4420 protected void onDraw(Canvas c) { 4421 final int drawWidth = mDrawable.getIntrinsicWidth(); 4422 final int left = getHorizontalOffset(); 4423 4424 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4425 mDrawable.draw(c); 4426 } 4427 4428 private int getHorizontalOffset() { 4429 final int width = getPreferredWidth(); 4430 final int drawWidth = mDrawable.getIntrinsicWidth(); 4431 final int left; 4432 switch (mHorizontalGravity) { 4433 case Gravity.LEFT: 4434 left = 0; 4435 break; 4436 default: 4437 case Gravity.CENTER: 4438 left = (width - drawWidth) / 2; 4439 break; 4440 case Gravity.RIGHT: 4441 left = width - drawWidth; 4442 break; 4443 } 4444 return left; 4445 } 4446 4447 protected int getCursorOffset() { 4448 return 0; 4449 } 4450 4451 @Override 4452 public boolean onTouchEvent(MotionEvent ev) { 4453 updateFloatingToolbarVisibility(ev); 4454 4455 switch (ev.getActionMasked()) { 4456 case MotionEvent.ACTION_DOWN: { 4457 startTouchUpFilter(getCurrentCursorOffset()); 4458 4459 final PositionListener positionListener = getPositionListener(); 4460 mLastParentX = positionListener.getPositionX(); 4461 mLastParentY = positionListener.getPositionY(); 4462 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4463 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4464 4465 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4466 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4467 mTouchToWindowOffsetX = xInWindow - mPositionX; 4468 mTouchToWindowOffsetY = yInWindow - mPositionY; 4469 4470 mIsDragging = true; 4471 mPreviousLineTouched = UNSET_LINE; 4472 break; 4473 } 4474 4475 case MotionEvent.ACTION_MOVE: { 4476 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4477 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4478 4479 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4480 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4481 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4482 float newVerticalOffset; 4483 if (previousVerticalOffset < mIdealVerticalOffset) { 4484 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4485 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4486 } else { 4487 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4488 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4489 } 4490 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4491 4492 final float newPosX = 4493 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4494 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4495 4496 updatePosition(newPosX, newPosY); 4497 break; 4498 } 4499 4500 case MotionEvent.ACTION_UP: 4501 filterOnTouchUp(); 4502 mIsDragging = false; 4503 updateDrawable(); 4504 break; 4505 4506 case MotionEvent.ACTION_CANCEL: 4507 mIsDragging = false; 4508 updateDrawable(); 4509 break; 4510 } 4511 return true; 4512 } 4513 4514 public boolean isDragging() { 4515 return mIsDragging; 4516 } 4517 4518 void onHandleMoved() {} 4519 4520 public void onDetached() {} 4521 } 4522 4523 private class InsertionHandleView extends HandleView { 4524 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4525 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4526 4527 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4528 private float mDownPositionX, mDownPositionY; 4529 private Runnable mHider; 4530 4531 public InsertionHandleView(Drawable drawable) { 4532 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4533 } 4534 4535 @Override 4536 public void show() { 4537 super.show(); 4538 4539 final long durationSinceCutOrCopy = 4540 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4541 4542 // Cancel the single tap delayed runnable. 4543 if (mInsertionActionModeRunnable != null 4544 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4545 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4546 || isCursorInsideEasyCorrectionSpan())) { 4547 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4548 } 4549 4550 // Prepare and schedule the single tap runnable to run exactly after the double tap 4551 // timeout has passed. 4552 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4553 && !isCursorInsideEasyCorrectionSpan() 4554 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4555 if (mTextActionMode == null) { 4556 if (mInsertionActionModeRunnable == null) { 4557 mInsertionActionModeRunnable = new Runnable() { 4558 @Override 4559 public void run() { 4560 startInsertionActionMode(); 4561 } 4562 }; 4563 } 4564 mTextView.postDelayed( 4565 mInsertionActionModeRunnable, 4566 ViewConfiguration.getDoubleTapTimeout() + 1); 4567 } 4568 4569 } 4570 4571 hideAfterDelay(); 4572 } 4573 4574 private void hideAfterDelay() { 4575 if (mHider == null) { 4576 mHider = new Runnable() { 4577 public void run() { 4578 hide(); 4579 } 4580 }; 4581 } else { 4582 removeHiderCallback(); 4583 } 4584 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4585 } 4586 4587 private void removeHiderCallback() { 4588 if (mHider != null) { 4589 mTextView.removeCallbacks(mHider); 4590 } 4591 } 4592 4593 @Override 4594 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4595 return drawable.getIntrinsicWidth() / 2; 4596 } 4597 4598 @Override 4599 protected int getHorizontalGravity(boolean isRtlRun) { 4600 return Gravity.CENTER_HORIZONTAL; 4601 } 4602 4603 @Override 4604 protected int getCursorOffset() { 4605 int offset = super.getCursorOffset(); 4606 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4607 if (cursor != null) { 4608 cursor.getPadding(mTempRect); 4609 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4610 } 4611 return offset; 4612 } 4613 4614 @Override 4615 int getCursorHorizontalPosition(Layout layout, int offset) { 4616 final Drawable drawable = mCursorCount > 0 ? mCursorDrawable[0] : null; 4617 if (drawable != null) { 4618 final float horizontal = getHorizontal(layout, offset); 4619 return clampHorizontalPosition(drawable, horizontal) + mTempRect.left; 4620 } 4621 return super.getCursorHorizontalPosition(layout, offset); 4622 } 4623 4624 @Override 4625 public boolean onTouchEvent(MotionEvent ev) { 4626 final boolean result = super.onTouchEvent(ev); 4627 4628 switch (ev.getActionMasked()) { 4629 case MotionEvent.ACTION_DOWN: 4630 mDownPositionX = ev.getRawX(); 4631 mDownPositionY = ev.getRawY(); 4632 break; 4633 4634 case MotionEvent.ACTION_UP: 4635 if (!offsetHasBeenChanged()) { 4636 final float deltaX = mDownPositionX - ev.getRawX(); 4637 final float deltaY = mDownPositionY - ev.getRawY(); 4638 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4639 4640 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4641 mTextView.getContext()); 4642 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4643 4644 if (distanceSquared < touchSlop * touchSlop) { 4645 // Tapping on the handle toggles the insertion action mode. 4646 if (mTextActionMode != null) { 4647 stopTextActionMode(); 4648 } else { 4649 startInsertionActionMode(); 4650 } 4651 } 4652 } else { 4653 if (mTextActionMode != null) { 4654 mTextActionMode.invalidateContentRect(); 4655 } 4656 } 4657 hideAfterDelay(); 4658 break; 4659 4660 case MotionEvent.ACTION_CANCEL: 4661 hideAfterDelay(); 4662 break; 4663 4664 default: 4665 break; 4666 } 4667 4668 return result; 4669 } 4670 4671 @Override 4672 public int getCurrentCursorOffset() { 4673 return mTextView.getSelectionStart(); 4674 } 4675 4676 @Override 4677 public void updateSelection(int offset) { 4678 Selection.setSelection((Spannable) mTextView.getText(), offset); 4679 } 4680 4681 @Override 4682 public void updatePosition(float x, float y) { 4683 Layout layout = mTextView.getLayout(); 4684 int offset; 4685 if (layout != null) { 4686 if (mPreviousLineTouched == UNSET_LINE) { 4687 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4688 } 4689 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4690 offset = getOffsetAtCoordinate(layout, currLine, x); 4691 mPreviousLineTouched = currLine; 4692 } else { 4693 offset = -1; 4694 } 4695 positionAtCursorOffset(offset, false); 4696 if (mTextActionMode != null) { 4697 invalidateActionModeAsync(); 4698 } 4699 } 4700 4701 @Override 4702 void onHandleMoved() { 4703 super.onHandleMoved(); 4704 removeHiderCallback(); 4705 } 4706 4707 @Override 4708 public void onDetached() { 4709 super.onDetached(); 4710 removeHiderCallback(); 4711 } 4712 } 4713 4714 @Retention(RetentionPolicy.SOURCE) 4715 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4716 public @interface HandleType {} 4717 public static final int HANDLE_TYPE_SELECTION_START = 0; 4718 public static final int HANDLE_TYPE_SELECTION_END = 1; 4719 4720 private class SelectionHandleView extends HandleView { 4721 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4722 // end (HANDLE_TYPE_SELECTION_END). 4723 @HandleType 4724 private final int mHandleType; 4725 // Indicates whether the cursor is making adjustments within a word. 4726 private boolean mInWord = false; 4727 // Difference between touch position and word boundary position. 4728 private float mTouchWordDelta; 4729 // X value of the previous updatePosition call. 4730 private float mPrevX; 4731 // Indicates if the handle has moved a boundary between LTR and RTL text. 4732 private boolean mLanguageDirectionChanged = false; 4733 // Distance from edge of horizontally scrolling text view 4734 // to use to switch to character mode. 4735 private final float mTextViewEdgeSlop; 4736 // Used to save text view location. 4737 private final int[] mTextViewLocation = new int[2]; 4738 4739 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4740 @HandleType int handleType) { 4741 super(drawableLtr, drawableRtl, id); 4742 mHandleType = handleType; 4743 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4744 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4745 } 4746 4747 private boolean isStartHandle() { 4748 return mHandleType == HANDLE_TYPE_SELECTION_START; 4749 } 4750 4751 @Override 4752 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4753 if (isRtlRun == isStartHandle()) { 4754 return drawable.getIntrinsicWidth() / 4; 4755 } else { 4756 return (drawable.getIntrinsicWidth() * 3) / 4; 4757 } 4758 } 4759 4760 @Override 4761 protected int getHorizontalGravity(boolean isRtlRun) { 4762 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4763 } 4764 4765 @Override 4766 public int getCurrentCursorOffset() { 4767 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4768 } 4769 4770 @Override 4771 protected void updateSelection(int offset) { 4772 if (isStartHandle()) { 4773 Selection.setSelection((Spannable) mTextView.getText(), offset, 4774 mTextView.getSelectionEnd()); 4775 } else { 4776 Selection.setSelection((Spannable) mTextView.getText(), 4777 mTextView.getSelectionStart(), offset); 4778 } 4779 updateDrawable(); 4780 if (mTextActionMode != null) { 4781 invalidateActionModeAsync(); 4782 } 4783 } 4784 4785 @Override 4786 public void updatePosition(float x, float y) { 4787 final Layout layout = mTextView.getLayout(); 4788 if (layout == null) { 4789 // HandleView will deal appropriately in positionAtCursorOffset when 4790 // layout is null. 4791 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y)); 4792 return; 4793 } 4794 4795 if (mPreviousLineTouched == UNSET_LINE) { 4796 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4797 } 4798 4799 boolean positionCursor = false; 4800 final int anotherHandleOffset = 4801 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4802 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4803 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4804 4805 if (isStartHandle() && initialOffset >= anotherHandleOffset 4806 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4807 // Handles have crossed, bound it to the first selected line and 4808 // adjust by word / char as normal. 4809 currLine = layout.getLineForOffset(anotherHandleOffset); 4810 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4811 } 4812 4813 int offset = initialOffset; 4814 final int wordEnd = getWordEnd(offset); 4815 final int wordStart = getWordStart(offset); 4816 4817 if (mPrevX == UNSET_X_VALUE) { 4818 mPrevX = x; 4819 } 4820 4821 final int currentOffset = getCurrentCursorOffset(); 4822 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4823 final boolean atRtl = isAtRtlRun(layout, offset); 4824 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4825 4826 // We can't determine if the user is expanding or shrinking the selection if they're 4827 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4828 // the cursor at the current position. 4829 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4830 // We're on a boundary or this is the first direction change -- just update 4831 // to the current position. 4832 mLanguageDirectionChanged = true; 4833 mTouchWordDelta = 0.0f; 4834 positionAndAdjustForCrossingHandles(offset); 4835 return; 4836 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4837 // We've just moved past the boundary so update the position. After this we can 4838 // figure out if the user is expanding or shrinking to go by word or character. 4839 positionAndAdjustForCrossingHandles(offset); 4840 mTouchWordDelta = 0.0f; 4841 mLanguageDirectionChanged = false; 4842 return; 4843 } 4844 4845 boolean isExpanding; 4846 final float xDiff = x - mPrevX; 4847 if (isStartHandle()) { 4848 isExpanding = currLine < mPreviousLineTouched; 4849 } else { 4850 isExpanding = currLine > mPreviousLineTouched; 4851 } 4852 if (atRtl == isStartHandle()) { 4853 isExpanding |= xDiff > 0; 4854 } else { 4855 isExpanding |= xDiff < 0; 4856 } 4857 4858 if (mTextView.getHorizontallyScrolling()) { 4859 if (positionNearEdgeOfScrollingView(x, atRtl) 4860 && ((isStartHandle() && mTextView.getScrollX() != 0) 4861 || (!isStartHandle() 4862 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4863 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4864 || (!isStartHandle() && offset > currentOffset))) 4865 || !isExpanding)) { 4866 // If we're expanding ensure that the offset is actually expanding compared to 4867 // the current offset, if the handle snapped to the word, the finger position 4868 // may be out of sync and we don't want the selection to jump back. 4869 mTouchWordDelta = 0.0f; 4870 final int nextOffset = (atRtl == isStartHandle()) 4871 ? layout.getOffsetToRightOf(mPreviousOffset) 4872 : layout.getOffsetToLeftOf(mPreviousOffset); 4873 positionAndAdjustForCrossingHandles(nextOffset); 4874 return; 4875 } 4876 } 4877 4878 if (isExpanding) { 4879 // User is increasing the selection. 4880 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4881 final boolean snapToWord = (!mInWord 4882 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4883 && atRtl == isAtRtlRun(layout, wordBoundary); 4884 if (snapToWord) { 4885 // Sometimes words can be broken across lines (Chinese, hyphenation). 4886 // We still snap to the word boundary but we only use the letters on the 4887 // current line to determine if the user is far enough into the word to snap. 4888 if (layout.getLineForOffset(wordBoundary) != currLine) { 4889 wordBoundary = isStartHandle() 4890 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4891 } 4892 final int offsetThresholdToSnap = isStartHandle() 4893 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4894 : wordStart + ((wordBoundary - wordStart) / 2); 4895 if (isStartHandle() 4896 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4897 // User is far enough into the word or on a different line so we expand by 4898 // word. 4899 offset = wordStart; 4900 } else if (!isStartHandle() 4901 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4902 // User is far enough into the word or on a different line so we expand by 4903 // word. 4904 offset = wordEnd; 4905 } else { 4906 offset = mPreviousOffset; 4907 } 4908 } 4909 if ((isStartHandle() && offset < initialOffset) 4910 || (!isStartHandle() && offset > initialOffset)) { 4911 final float adjustedX = getHorizontal(layout, offset); 4912 mTouchWordDelta = 4913 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4914 } else { 4915 mTouchWordDelta = 0.0f; 4916 } 4917 positionCursor = true; 4918 } else { 4919 final int adjustedOffset = 4920 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4921 final boolean shrinking = isStartHandle() 4922 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4923 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4924 if (shrinking) { 4925 // User is shrinking the selection. 4926 if (currLine != mPrevLine) { 4927 // We're on a different line, so we'll snap to word boundaries. 4928 offset = isStartHandle() ? wordStart : wordEnd; 4929 if ((isStartHandle() && offset < initialOffset) 4930 || (!isStartHandle() && offset > initialOffset)) { 4931 final float adjustedX = getHorizontal(layout, offset); 4932 mTouchWordDelta = 4933 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4934 } else { 4935 mTouchWordDelta = 0.0f; 4936 } 4937 } else { 4938 offset = adjustedOffset; 4939 } 4940 positionCursor = true; 4941 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4942 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4943 // Handle has jumped to the word boundary, and the user is moving 4944 // their finger towards the handle, the delta should be updated. 4945 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4946 - getHorizontal(layout, mPreviousOffset); 4947 } 4948 } 4949 4950 if (positionCursor) { 4951 mPreviousLineTouched = currLine; 4952 positionAndAdjustForCrossingHandles(offset); 4953 } 4954 mPrevX = x; 4955 } 4956 4957 @Override 4958 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4959 super.positionAtCursorOffset(offset, forceUpdatePosition); 4960 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 4961 } 4962 4963 @Override 4964 public boolean onTouchEvent(MotionEvent event) { 4965 boolean superResult = super.onTouchEvent(event); 4966 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 4967 // Reset the touch word offset and x value when the user 4968 // re-engages the handle. 4969 mTouchWordDelta = 0.0f; 4970 mPrevX = UNSET_X_VALUE; 4971 } 4972 return superResult; 4973 } 4974 4975 private void positionAndAdjustForCrossingHandles(int offset) { 4976 final int anotherHandleOffset = 4977 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4978 if ((isStartHandle() && offset >= anotherHandleOffset) 4979 || (!isStartHandle() && offset <= anotherHandleOffset)) { 4980 mTouchWordDelta = 0.0f; 4981 final Layout layout = mTextView.getLayout(); 4982 if (layout != null && offset != anotherHandleOffset) { 4983 final float horiz = getHorizontal(layout, offset); 4984 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 4985 !isStartHandle()); 4986 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 4987 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 4988 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 4989 // This handle passes another one as it crossed a direction boundary. 4990 // Don't minimize the selection, but keep the handle at the run boundary. 4991 final int currentOffset = getCurrentCursorOffset(); 4992 final int offsetToGetRunRange = isStartHandle() 4993 ? currentOffset : Math.max(currentOffset - 1, 0); 4994 final long range = layout.getRunRange(offsetToGetRunRange); 4995 if (isStartHandle()) { 4996 offset = TextUtils.unpackRangeStartFromLong(range); 4997 } else { 4998 offset = TextUtils.unpackRangeEndFromLong(range); 4999 } 5000 positionAtCursorOffset(offset, false); 5001 return; 5002 } 5003 } 5004 // Handles can not cross and selection is at least one character. 5005 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5006 } 5007 positionAtCursorOffset(offset, false); 5008 } 5009 5010 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5011 mTextView.getLocationOnScreen(mTextViewLocation); 5012 boolean nearEdge; 5013 if (atRtl == isStartHandle()) { 5014 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5015 - mTextView.getPaddingRight(); 5016 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5017 } else { 5018 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5019 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5020 } 5021 return nearEdge; 5022 } 5023 5024 @Override 5025 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5026 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5027 return layout.isRtlCharAt(offsetToCheck); 5028 } 5029 5030 @Override 5031 public float getHorizontal(@NonNull Layout layout, int offset) { 5032 return getHorizontal(layout, offset, isStartHandle()); 5033 } 5034 5035 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5036 final int line = layout.getLineForOffset(offset); 5037 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5038 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5039 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5040 return (isRtlChar == isRtlParagraph) 5041 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5042 } 5043 5044 @Override 5045 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5046 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5047 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5048 if (!layout.isLevelBoundary(primaryOffset)) { 5049 return primaryOffset; 5050 } 5051 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5052 final int currentOffset = getCurrentCursorOffset(); 5053 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5054 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5055 if (primaryDiff < secondaryDiff) { 5056 return primaryOffset; 5057 } else if (primaryDiff > secondaryDiff) { 5058 return secondaryOffset; 5059 } else { 5060 final int offsetToCheck = isStartHandle() 5061 ? currentOffset : Math.max(currentOffset - 1, 0); 5062 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5063 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5064 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5065 } 5066 } 5067 } 5068 5069 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5070 final int trueLine = mTextView.getLineAtCoordinate(y); 5071 if (layout == null || prevLine > layout.getLineCount() 5072 || layout.getLineCount() <= 0 || prevLine < 0) { 5073 // Invalid parameters, just return whatever line is at y. 5074 return trueLine; 5075 } 5076 5077 if (Math.abs(trueLine - prevLine) >= 2) { 5078 // Only stick to lines if we're within a line of the previous selection. 5079 return trueLine; 5080 } 5081 5082 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5083 final int lineCount = layout.getLineCount(); 5084 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5085 5086 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5087 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5088 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5089 5090 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5091 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5092 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5093 5094 // Determine if we've moved lines based on y position and previous line. 5095 int currLine; 5096 if (y <= yTopBound) { 5097 currLine = Math.max(prevLine - 1, 0); 5098 } else if (y >= yBottomBound) { 5099 currLine = Math.min(prevLine + 1, lineCount - 1); 5100 } else { 5101 currLine = prevLine; 5102 } 5103 return currLine; 5104 } 5105 5106 /** 5107 * A CursorController instance can be used to control a cursor in the text. 5108 */ 5109 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5110 /** 5111 * Makes the cursor controller visible on screen. 5112 * See also {@link #hide()}. 5113 */ 5114 public void show(); 5115 5116 /** 5117 * Hide the cursor controller from screen. 5118 * See also {@link #show()}. 5119 */ 5120 public void hide(); 5121 5122 /** 5123 * Called when the view is detached from window. Perform house keeping task, such as 5124 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5125 * preventing the activity from being recycled. 5126 */ 5127 public void onDetached(); 5128 5129 public boolean isCursorBeingModified(); 5130 5131 public boolean isActive(); 5132 } 5133 5134 private class InsertionPointCursorController implements CursorController { 5135 private InsertionHandleView mHandle; 5136 5137 public void show() { 5138 getHandle().show(); 5139 5140 if (mSelectionModifierCursorController != null) { 5141 mSelectionModifierCursorController.hide(); 5142 } 5143 } 5144 5145 public void hide() { 5146 if (mHandle != null) { 5147 mHandle.hide(); 5148 } 5149 } 5150 5151 public void onTouchModeChanged(boolean isInTouchMode) { 5152 if (!isInTouchMode) { 5153 hide(); 5154 } 5155 } 5156 5157 private InsertionHandleView getHandle() { 5158 if (mSelectHandleCenter == null) { 5159 mSelectHandleCenter = mTextView.getContext().getDrawable( 5160 mTextView.mTextSelectHandleRes); 5161 } 5162 if (mHandle == null) { 5163 mHandle = new InsertionHandleView(mSelectHandleCenter); 5164 } 5165 return mHandle; 5166 } 5167 5168 @Override 5169 public void onDetached() { 5170 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5171 observer.removeOnTouchModeChangeListener(this); 5172 5173 if (mHandle != null) mHandle.onDetached(); 5174 } 5175 5176 @Override 5177 public boolean isCursorBeingModified() { 5178 return mHandle != null && mHandle.isDragging(); 5179 } 5180 5181 @Override 5182 public boolean isActive() { 5183 return mHandle != null && mHandle.isShowing(); 5184 } 5185 5186 public void invalidateHandle() { 5187 if (mHandle != null) { 5188 mHandle.invalidate(); 5189 } 5190 } 5191 } 5192 5193 class SelectionModifierCursorController implements CursorController { 5194 // The cursor controller handles, lazily created when shown. 5195 private SelectionHandleView mStartHandle; 5196 private SelectionHandleView mEndHandle; 5197 // The offsets of that last touch down event. Remembered to start selection there. 5198 private int mMinTouchOffset, mMaxTouchOffset; 5199 5200 private float mDownPositionX, mDownPositionY; 5201 private boolean mGestureStayedInTapRegion; 5202 5203 // Where the user first starts the drag motion. 5204 private int mStartOffset = -1; 5205 5206 private boolean mHaventMovedEnoughToStartDrag; 5207 // The line that a selection happened most recently with the drag accelerator. 5208 private int mLineSelectionIsOn = -1; 5209 // Whether the drag accelerator has selected past the initial line. 5210 private boolean mSwitchedLines = false; 5211 5212 // Indicates the drag accelerator mode that the user is currently using. 5213 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5214 // Drag accelerator is inactive. 5215 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5216 // Character based selection by dragging. Only for mouse. 5217 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5218 // Word based selection by dragging. Enabled after long pressing or double tapping. 5219 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5220 // Paragraph based selection by dragging. Enabled after mouse triple click. 5221 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5222 5223 SelectionModifierCursorController() { 5224 resetTouchOffsets(); 5225 } 5226 5227 public void show() { 5228 if (mTextView.isInBatchEditMode()) { 5229 return; 5230 } 5231 initDrawables(); 5232 initHandles(); 5233 } 5234 5235 private void initDrawables() { 5236 if (mSelectHandleLeft == null) { 5237 mSelectHandleLeft = mTextView.getContext().getDrawable( 5238 mTextView.mTextSelectHandleLeftRes); 5239 } 5240 if (mSelectHandleRight == null) { 5241 mSelectHandleRight = mTextView.getContext().getDrawable( 5242 mTextView.mTextSelectHandleRightRes); 5243 } 5244 } 5245 5246 private void initHandles() { 5247 // Lazy object creation has to be done before updatePosition() is called. 5248 if (mStartHandle == null) { 5249 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5250 com.android.internal.R.id.selection_start_handle, 5251 HANDLE_TYPE_SELECTION_START); 5252 } 5253 if (mEndHandle == null) { 5254 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5255 com.android.internal.R.id.selection_end_handle, 5256 HANDLE_TYPE_SELECTION_END); 5257 } 5258 5259 mStartHandle.show(); 5260 mEndHandle.show(); 5261 5262 hideInsertionPointCursorController(); 5263 } 5264 5265 public void hide() { 5266 if (mStartHandle != null) mStartHandle.hide(); 5267 if (mEndHandle != null) mEndHandle.hide(); 5268 } 5269 5270 public void enterDrag(int dragAcceleratorMode) { 5271 // Just need to init the handles / hide insertion cursor. 5272 show(); 5273 mDragAcceleratorMode = dragAcceleratorMode; 5274 // Start location of selection. 5275 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5276 mLastDownPositionY); 5277 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5278 // Don't show the handles until user has lifted finger. 5279 hide(); 5280 5281 // This stops scrolling parents from intercepting the touch event, allowing 5282 // the user to continue dragging across the screen to select text; TextView will 5283 // scroll as necessary. 5284 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5285 mTextView.cancelLongPress(); 5286 } 5287 5288 public void onTouchEvent(MotionEvent event) { 5289 // This is done even when the View does not have focus, so that long presses can start 5290 // selection and tap can move cursor from this tap position. 5291 final float eventX = event.getX(); 5292 final float eventY = event.getY(); 5293 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5294 switch (event.getActionMasked()) { 5295 case MotionEvent.ACTION_DOWN: 5296 if (extractedTextModeWillBeStarted()) { 5297 // Prevent duplicating the selection handles until the mode starts. 5298 hide(); 5299 } else { 5300 // Remember finger down position, to be able to start selection from there. 5301 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5302 eventX, eventY); 5303 5304 // Double tap detection 5305 if (mGestureStayedInTapRegion) { 5306 if (mTapState == TAP_STATE_DOUBLE_TAP 5307 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5308 final float deltaX = eventX - mDownPositionX; 5309 final float deltaY = eventY - mDownPositionY; 5310 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5311 5312 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5313 mTextView.getContext()); 5314 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5315 boolean stayedInArea = 5316 distanceSquared < doubleTapSlop * doubleTapSlop; 5317 5318 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5319 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5320 selectCurrentWordAndStartDrag(); 5321 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5322 selectCurrentParagraphAndStartDrag(); 5323 } 5324 mDiscardNextActionUp = true; 5325 } 5326 } 5327 } 5328 5329 mDownPositionX = eventX; 5330 mDownPositionY = eventY; 5331 mGestureStayedInTapRegion = true; 5332 mHaventMovedEnoughToStartDrag = true; 5333 } 5334 break; 5335 5336 case MotionEvent.ACTION_POINTER_DOWN: 5337 case MotionEvent.ACTION_POINTER_UP: 5338 // Handle multi-point gestures. Keep min and max offset positions. 5339 // Only activated for devices that correctly handle multi-touch. 5340 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5341 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5342 updateMinAndMaxOffsets(event); 5343 } 5344 break; 5345 5346 case MotionEvent.ACTION_MOVE: 5347 final ViewConfiguration viewConfig = ViewConfiguration.get( 5348 mTextView.getContext()); 5349 final int touchSlop = viewConfig.getScaledTouchSlop(); 5350 5351 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5352 final float deltaX = eventX - mDownPositionX; 5353 final float deltaY = eventY - mDownPositionY; 5354 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5355 5356 if (mGestureStayedInTapRegion) { 5357 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5358 mGestureStayedInTapRegion = 5359 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5360 } 5361 if (mHaventMovedEnoughToStartDrag) { 5362 // We don't start dragging until the user has moved enough. 5363 mHaventMovedEnoughToStartDrag = 5364 distanceSquared <= touchSlop * touchSlop; 5365 } 5366 } 5367 5368 if (isMouse && !isDragAcceleratorActive()) { 5369 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5370 if (mTextView.hasSelection() 5371 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5372 && offset >= mTextView.getSelectionStart() 5373 && offset <= mTextView.getSelectionEnd()) { 5374 startDragAndDrop(); 5375 break; 5376 } 5377 5378 if (mStartOffset != offset) { 5379 // Start character based drag accelerator. 5380 stopTextActionMode(); 5381 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5382 mDiscardNextActionUp = true; 5383 mHaventMovedEnoughToStartDrag = false; 5384 } 5385 } 5386 5387 if (mStartHandle != null && mStartHandle.isShowing()) { 5388 // Don't do the drag if the handles are showing already. 5389 break; 5390 } 5391 5392 updateSelection(event); 5393 break; 5394 5395 case MotionEvent.ACTION_UP: 5396 if (!isDragAcceleratorActive()) { 5397 break; 5398 } 5399 updateSelection(event); 5400 5401 // No longer dragging to select text, let the parent intercept events. 5402 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5403 5404 // No longer the first dragging motion, reset. 5405 resetDragAcceleratorState(); 5406 5407 if (mTextView.hasSelection()) { 5408 // Do not invoke the text assistant if this was a drag selection. 5409 if (mHaventMovedEnoughToStartDrag) { 5410 startSelectionActionModeAsync(); 5411 } else { 5412 startSelectionActionMode(); 5413 } 5414 5415 } 5416 break; 5417 } 5418 } 5419 5420 private void updateSelection(MotionEvent event) { 5421 if (mTextView.getLayout() != null) { 5422 switch (mDragAcceleratorMode) { 5423 case DRAG_ACCELERATOR_MODE_CHARACTER: 5424 updateCharacterBasedSelection(event); 5425 break; 5426 case DRAG_ACCELERATOR_MODE_WORD: 5427 updateWordBasedSelection(event); 5428 break; 5429 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5430 updateParagraphBasedSelection(event); 5431 break; 5432 } 5433 } 5434 } 5435 5436 /** 5437 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5438 * 5439 * @return true if the drag was started. 5440 */ 5441 private boolean selectCurrentParagraphAndStartDrag() { 5442 if (mInsertionActionModeRunnable != null) { 5443 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5444 } 5445 stopTextActionMode(); 5446 if (!selectCurrentParagraph()) { 5447 return false; 5448 } 5449 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5450 return true; 5451 } 5452 5453 private void updateCharacterBasedSelection(MotionEvent event) { 5454 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5455 Selection.setSelection((Spannable) mTextView.getText(), mStartOffset, offset); 5456 } 5457 5458 private void updateWordBasedSelection(MotionEvent event) { 5459 if (mHaventMovedEnoughToStartDrag) { 5460 return; 5461 } 5462 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5463 final ViewConfiguration viewConfig = ViewConfiguration.get( 5464 mTextView.getContext()); 5465 final float eventX = event.getX(); 5466 final float eventY = event.getY(); 5467 final int currLine; 5468 if (isMouse) { 5469 // No need to offset the y coordinate for mouse input. 5470 currLine = mTextView.getLineAtCoordinate(eventY); 5471 } else { 5472 float y = eventY; 5473 if (mSwitchedLines) { 5474 // Offset the finger by the same vertical offset as the handles. 5475 // This improves visibility of the content being selected by 5476 // shifting the finger below the content, this is applied once 5477 // the user has switched lines. 5478 final int touchSlop = viewConfig.getScaledTouchSlop(); 5479 final float fingerOffset = (mStartHandle != null) 5480 ? mStartHandle.getIdealVerticalOffset() 5481 : touchSlop; 5482 y = eventY - fingerOffset; 5483 } 5484 5485 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5486 y); 5487 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5488 // Break early here, we want to offset the finger position from 5489 // the selection highlight, once the user moved their finger 5490 // to a different line we should apply the offset and *not* switch 5491 // lines until recomputing the position with the finger offset. 5492 mSwitchedLines = true; 5493 return; 5494 } 5495 } 5496 5497 int startOffset; 5498 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5499 // Snap to word boundaries. 5500 if (mStartOffset < offset) { 5501 // Expanding with end handle. 5502 offset = getWordEnd(offset); 5503 startOffset = getWordStart(mStartOffset); 5504 } else { 5505 // Expanding with start handle. 5506 offset = getWordStart(offset); 5507 startOffset = getWordEnd(mStartOffset); 5508 if (startOffset == offset) { 5509 offset = getNextCursorOffset(offset, false); 5510 } 5511 } 5512 mLineSelectionIsOn = currLine; 5513 Selection.setSelection((Spannable) mTextView.getText(), startOffset, offset); 5514 } 5515 5516 private void updateParagraphBasedSelection(MotionEvent event) { 5517 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5518 5519 final int start = Math.min(offset, mStartOffset); 5520 final int end = Math.max(offset, mStartOffset); 5521 final long paragraphsRange = getParagraphsRange(start, end); 5522 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5523 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5524 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5525 } 5526 5527 /** 5528 * @param event 5529 */ 5530 private void updateMinAndMaxOffsets(MotionEvent event) { 5531 int pointerCount = event.getPointerCount(); 5532 for (int index = 0; index < pointerCount; index++) { 5533 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5534 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5535 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5536 } 5537 } 5538 5539 public int getMinTouchOffset() { 5540 return mMinTouchOffset; 5541 } 5542 5543 public int getMaxTouchOffset() { 5544 return mMaxTouchOffset; 5545 } 5546 5547 public void resetTouchOffsets() { 5548 mMinTouchOffset = mMaxTouchOffset = -1; 5549 resetDragAcceleratorState(); 5550 } 5551 5552 private void resetDragAcceleratorState() { 5553 mStartOffset = -1; 5554 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5555 mSwitchedLines = false; 5556 final int selectionStart = mTextView.getSelectionStart(); 5557 final int selectionEnd = mTextView.getSelectionEnd(); 5558 if (selectionStart > selectionEnd) { 5559 Selection.setSelection((Spannable) mTextView.getText(), 5560 selectionEnd, selectionStart); 5561 } 5562 } 5563 5564 /** 5565 * @return true iff this controller is currently used to move the selection start. 5566 */ 5567 public boolean isSelectionStartDragged() { 5568 return mStartHandle != null && mStartHandle.isDragging(); 5569 } 5570 5571 @Override 5572 public boolean isCursorBeingModified() { 5573 return isDragAcceleratorActive() || isSelectionStartDragged() 5574 || (mEndHandle != null && mEndHandle.isDragging()); 5575 } 5576 5577 /** 5578 * @return true if the user is selecting text using the drag accelerator. 5579 */ 5580 public boolean isDragAcceleratorActive() { 5581 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5582 } 5583 5584 public void onTouchModeChanged(boolean isInTouchMode) { 5585 if (!isInTouchMode) { 5586 hide(); 5587 } 5588 } 5589 5590 @Override 5591 public void onDetached() { 5592 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5593 observer.removeOnTouchModeChangeListener(this); 5594 5595 if (mStartHandle != null) mStartHandle.onDetached(); 5596 if (mEndHandle != null) mEndHandle.onDetached(); 5597 } 5598 5599 @Override 5600 public boolean isActive() { 5601 return mStartHandle != null && mStartHandle.isShowing(); 5602 } 5603 5604 public void invalidateHandles() { 5605 if (mStartHandle != null) { 5606 mStartHandle.invalidate(); 5607 } 5608 if (mEndHandle != null) { 5609 mEndHandle.invalidate(); 5610 } 5611 } 5612 } 5613 5614 private class CorrectionHighlighter { 5615 private final Path mPath = new Path(); 5616 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5617 private int mStart, mEnd; 5618 private long mFadingStartTime; 5619 private RectF mTempRectF; 5620 private static final int FADE_OUT_DURATION = 400; 5621 5622 public CorrectionHighlighter() { 5623 mPaint.setCompatibilityScaling( 5624 mTextView.getResources().getCompatibilityInfo().applicationScale); 5625 mPaint.setStyle(Paint.Style.FILL); 5626 } 5627 5628 public void highlight(CorrectionInfo info) { 5629 mStart = info.getOffset(); 5630 mEnd = mStart + info.getNewText().length(); 5631 mFadingStartTime = SystemClock.uptimeMillis(); 5632 5633 if (mStart < 0 || mEnd < 0) { 5634 stopAnimation(); 5635 } 5636 } 5637 5638 public void draw(Canvas canvas, int cursorOffsetVertical) { 5639 if (updatePath() && updatePaint()) { 5640 if (cursorOffsetVertical != 0) { 5641 canvas.translate(0, cursorOffsetVertical); 5642 } 5643 5644 canvas.drawPath(mPath, mPaint); 5645 5646 if (cursorOffsetVertical != 0) { 5647 canvas.translate(0, -cursorOffsetVertical); 5648 } 5649 invalidate(true); // TODO invalidate cursor region only 5650 } else { 5651 stopAnimation(); 5652 invalidate(false); // TODO invalidate cursor region only 5653 } 5654 } 5655 5656 private boolean updatePaint() { 5657 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5658 if (duration > FADE_OUT_DURATION) return false; 5659 5660 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5661 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5662 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5663 + ((int) (highlightColorAlpha * coef) << 24); 5664 mPaint.setColor(color); 5665 return true; 5666 } 5667 5668 private boolean updatePath() { 5669 final Layout layout = mTextView.getLayout(); 5670 if (layout == null) return false; 5671 5672 // Update in case text is edited while the animation is run 5673 final int length = mTextView.getText().length(); 5674 int start = Math.min(length, mStart); 5675 int end = Math.min(length, mEnd); 5676 5677 mPath.reset(); 5678 layout.getSelectionPath(start, end, mPath); 5679 return true; 5680 } 5681 5682 private void invalidate(boolean delayed) { 5683 if (mTextView.getLayout() == null) return; 5684 5685 if (mTempRectF == null) mTempRectF = new RectF(); 5686 mPath.computeBounds(mTempRectF, false); 5687 5688 int left = mTextView.getCompoundPaddingLeft(); 5689 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5690 5691 if (delayed) { 5692 mTextView.postInvalidateOnAnimation( 5693 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5694 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5695 } else { 5696 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5697 (int) mTempRectF.right, (int) mTempRectF.bottom); 5698 } 5699 } 5700 5701 private void stopAnimation() { 5702 Editor.this.mCorrectionHighlighter = null; 5703 } 5704 } 5705 5706 private static class ErrorPopup extends PopupWindow { 5707 private boolean mAbove = false; 5708 private final TextView mView; 5709 private int mPopupInlineErrorBackgroundId = 0; 5710 private int mPopupInlineErrorAboveBackgroundId = 0; 5711 5712 ErrorPopup(TextView v, int width, int height) { 5713 super(v, width, height); 5714 mView = v; 5715 // Make sure the TextView has a background set as it will be used the first time it is 5716 // shown and positioned. Initialized with below background, which should have 5717 // dimensions identical to the above version for this to work (and is more likely). 5718 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5719 com.android.internal.R.styleable.Theme_errorMessageBackground); 5720 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5721 } 5722 5723 void fixDirection(boolean above) { 5724 mAbove = above; 5725 5726 if (above) { 5727 mPopupInlineErrorAboveBackgroundId = 5728 getResourceId(mPopupInlineErrorAboveBackgroundId, 5729 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5730 } else { 5731 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5732 com.android.internal.R.styleable.Theme_errorMessageBackground); 5733 } 5734 5735 mView.setBackgroundResource( 5736 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5737 } 5738 5739 private int getResourceId(int currentId, int index) { 5740 if (currentId == 0) { 5741 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5742 R.styleable.Theme); 5743 currentId = styledAttributes.getResourceId(index, 0); 5744 styledAttributes.recycle(); 5745 } 5746 return currentId; 5747 } 5748 5749 @Override 5750 public void update(int x, int y, int w, int h, boolean force) { 5751 super.update(x, y, w, h, force); 5752 5753 boolean above = isAboveAnchor(); 5754 if (above != mAbove) { 5755 fixDirection(above); 5756 } 5757 } 5758 } 5759 5760 static class InputContentType { 5761 int imeOptions = EditorInfo.IME_NULL; 5762 String privateImeOptions; 5763 CharSequence imeActionLabel; 5764 int imeActionId; 5765 Bundle extras; 5766 OnEditorActionListener onEditorActionListener; 5767 boolean enterDown; 5768 LocaleList imeHintLocales; 5769 } 5770 5771 static class InputMethodState { 5772 ExtractedTextRequest mExtractedTextRequest; 5773 final ExtractedText mExtractedText = new ExtractedText(); 5774 int mBatchEditNesting; 5775 boolean mCursorChanged; 5776 boolean mSelectionModeChanged; 5777 boolean mContentChanged; 5778 int mChangedStart, mChangedEnd, mChangedDelta; 5779 } 5780 5781 /** 5782 * @return True iff (start, end) is a valid range within the text. 5783 */ 5784 private static boolean isValidRange(CharSequence text, int start, int end) { 5785 return 0 <= start && start <= end && end <= text.length(); 5786 } 5787 5788 @VisibleForTesting 5789 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5790 return mSuggestionsPopupWindow; 5791 } 5792 5793 /** 5794 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5795 * text being typed (and hence always returns null from the filter() method). 5796 * 5797 * TODO: Make this span aware. 5798 */ 5799 public static class UndoInputFilter implements InputFilter { 5800 private final Editor mEditor; 5801 5802 // Whether the current filter pass is directly caused by an end-user text edit. 5803 private boolean mIsUserEdit; 5804 5805 // Whether the text field is handling an IME composition. Must be parceled in case the user 5806 // rotates the screen during composition. 5807 private boolean mHasComposition; 5808 5809 // Whether the user is expanding or shortening the text 5810 private boolean mExpanding; 5811 5812 // Whether the previous edit operation was in the current batch edit. 5813 private boolean mPreviousOperationWasInSameBatchEdit; 5814 5815 public UndoInputFilter(Editor editor) { 5816 mEditor = editor; 5817 } 5818 5819 public void saveInstanceState(Parcel parcel) { 5820 parcel.writeInt(mIsUserEdit ? 1 : 0); 5821 parcel.writeInt(mHasComposition ? 1 : 0); 5822 parcel.writeInt(mExpanding ? 1 : 0); 5823 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5824 } 5825 5826 public void restoreInstanceState(Parcel parcel) { 5827 mIsUserEdit = parcel.readInt() != 0; 5828 mHasComposition = parcel.readInt() != 0; 5829 mExpanding = parcel.readInt() != 0; 5830 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5831 } 5832 5833 /** 5834 * Signals that a user-triggered edit is starting. 5835 */ 5836 public void beginBatchEdit() { 5837 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5838 mIsUserEdit = true; 5839 } 5840 5841 public void endBatchEdit() { 5842 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5843 mIsUserEdit = false; 5844 mPreviousOperationWasInSameBatchEdit = false; 5845 } 5846 5847 @Override 5848 public CharSequence filter(CharSequence source, int start, int end, 5849 Spanned dest, int dstart, int dend) { 5850 if (DEBUG_UNDO) { 5851 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 5852 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5853 } 5854 5855 // Check to see if this edit should be tracked for undo. 5856 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5857 return null; 5858 } 5859 5860 final boolean hadComposition = mHasComposition; 5861 mHasComposition = isComposition(source); 5862 final boolean wasExpanding = mExpanding; 5863 boolean shouldCreateSeparateState = false; 5864 if ((end - start) != (dend - dstart)) { 5865 mExpanding = (end - start) > (dend - dstart); 5866 if (hadComposition && mExpanding != wasExpanding) { 5867 shouldCreateSeparateState = true; 5868 } 5869 } 5870 5871 // Handle edit. 5872 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5873 return null; 5874 } 5875 5876 void freezeLastEdit() { 5877 mEditor.mUndoManager.beginUpdate("Edit text"); 5878 EditOperation lastEdit = getLastEdit(); 5879 if (lastEdit != null) { 5880 lastEdit.mFrozen = true; 5881 } 5882 mEditor.mUndoManager.endUpdate(); 5883 } 5884 5885 @Retention(RetentionPolicy.SOURCE) 5886 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5887 private @interface MergeMode {} 5888 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5889 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5890 /** Use {@link EditOperation#mergeWith} to merge */ 5891 private static final int MERGE_EDIT_MODE_NORMAL = 2; 5892 5893 private void handleEdit(CharSequence source, int start, int end, 5894 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5895 // An application may install a TextWatcher to provide additional modifications after 5896 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5897 // string). This results in multiple filter() calls for what the user considers to be 5898 // a single operation. Always undo the whole set of changes in one step. 5899 @MergeMode 5900 final int mergeMode; 5901 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5902 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5903 } else if (shouldCreateSeparateState) { 5904 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5905 } else { 5906 mergeMode = MERGE_EDIT_MODE_NORMAL; 5907 } 5908 // Build a new operation with all the information from this edit. 5909 String newText = TextUtils.substring(source, start, end); 5910 String oldText = TextUtils.substring(dest, dstart, dend); 5911 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5912 mHasComposition); 5913 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5914 return; 5915 } 5916 recordEdit(edit, mergeMode); 5917 } 5918 5919 private EditOperation getLastEdit() { 5920 final UndoManager um = mEditor.mUndoManager; 5921 return um.getLastOperation( 5922 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5923 } 5924 /** 5925 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5926 * If forceMerge is true then the new edit is always merged. 5927 */ 5928 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5929 // Fetch the last edit operation and attempt to merge in the new edit. 5930 final UndoManager um = mEditor.mUndoManager; 5931 um.beginUpdate("Edit text"); 5932 EditOperation lastEdit = getLastEdit(); 5933 if (lastEdit == null) { 5934 // Add this as the first edit. 5935 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5936 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5937 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5938 // Forced merges take priority because they could be the result of a non-user-edit 5939 // change and this case should not create a new undo operation. 5940 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5941 lastEdit.forceMergeWith(edit); 5942 } else if (!mIsUserEdit) { 5943 // An application directly modified the Editable outside of a text edit. Treat this 5944 // as a new change and don't attempt to merge. 5945 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5946 um.commitState(mEditor.mUndoOwner); 5947 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5948 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 5949 // Merge succeeded, nothing else to do. 5950 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5951 } else { 5952 // Could not merge with the last edit, so commit the last edit and add this edit. 5953 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5954 um.commitState(mEditor.mUndoOwner); 5955 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5956 } 5957 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 5958 um.endUpdate(); 5959 } 5960 5961 private boolean canUndoEdit(CharSequence source, int start, int end, 5962 Spanned dest, int dstart, int dend) { 5963 if (!mEditor.mAllowUndo) { 5964 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5965 return false; 5966 } 5967 5968 if (mEditor.mUndoManager.isInUndo()) { 5969 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5970 return false; 5971 } 5972 5973 // Text filters run before input operations are applied. However, some input operations 5974 // are invalid and will throw exceptions when applied. This is common in tests. Don't 5975 // attempt to undo invalid operations. 5976 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 5977 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 5978 return false; 5979 } 5980 5981 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 5982 // on an input field. Skip no-op changes. 5983 if (start == end && dstart == dend) { 5984 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 5985 return false; 5986 } 5987 5988 return true; 5989 } 5990 5991 private static boolean isComposition(CharSequence source) { 5992 if (!(source instanceof Spannable)) { 5993 return false; 5994 } 5995 // This is a composition edit if the source has a non-zero-length composing span. 5996 Spannable text = (Spannable) source; 5997 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 5998 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 5999 return composeBegin < composeEnd; 6000 } 6001 6002 private boolean isInTextWatcher() { 6003 CharSequence text = mEditor.mTextView.getText(); 6004 return (text instanceof SpannableStringBuilder) 6005 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6006 } 6007 } 6008 6009 /** 6010 * An operation to undo a single "edit" to a text view. 6011 */ 6012 public static class EditOperation extends UndoOperation<Editor> { 6013 private static final int TYPE_INSERT = 0; 6014 private static final int TYPE_DELETE = 1; 6015 private static final int TYPE_REPLACE = 2; 6016 6017 private int mType; 6018 private String mOldText; 6019 private String mNewText; 6020 private int mStart; 6021 6022 private int mOldCursorPos; 6023 private int mNewCursorPos; 6024 private boolean mFrozen; 6025 private boolean mIsComposition; 6026 6027 /** 6028 * Constructs an edit operation from a text input operation on editor that replaces the 6029 * oldText starting at dstart with newText. 6030 */ 6031 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6032 boolean isComposition) { 6033 super(editor.mUndoOwner); 6034 mOldText = oldText; 6035 mNewText = newText; 6036 6037 // Determine the type of the edit. 6038 if (mNewText.length() > 0 && mOldText.length() == 0) { 6039 mType = TYPE_INSERT; 6040 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6041 mType = TYPE_DELETE; 6042 } else { 6043 mType = TYPE_REPLACE; 6044 } 6045 6046 mStart = dstart; 6047 // Store cursor data. 6048 mOldCursorPos = editor.mTextView.getSelectionStart(); 6049 mNewCursorPos = dstart + mNewText.length(); 6050 mIsComposition = isComposition; 6051 } 6052 6053 public EditOperation(Parcel src, ClassLoader loader) { 6054 super(src, loader); 6055 mType = src.readInt(); 6056 mOldText = src.readString(); 6057 mNewText = src.readString(); 6058 mStart = src.readInt(); 6059 mOldCursorPos = src.readInt(); 6060 mNewCursorPos = src.readInt(); 6061 mFrozen = src.readInt() == 1; 6062 mIsComposition = src.readInt() == 1; 6063 } 6064 6065 @Override 6066 public void writeToParcel(Parcel dest, int flags) { 6067 dest.writeInt(mType); 6068 dest.writeString(mOldText); 6069 dest.writeString(mNewText); 6070 dest.writeInt(mStart); 6071 dest.writeInt(mOldCursorPos); 6072 dest.writeInt(mNewCursorPos); 6073 dest.writeInt(mFrozen ? 1 : 0); 6074 dest.writeInt(mIsComposition ? 1 : 0); 6075 } 6076 6077 private int getNewTextEnd() { 6078 return mStart + mNewText.length(); 6079 } 6080 6081 private int getOldTextEnd() { 6082 return mStart + mOldText.length(); 6083 } 6084 6085 @Override 6086 public void commit() { 6087 } 6088 6089 @Override 6090 public void undo() { 6091 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6092 // Remove the new text and insert the old. 6093 Editor editor = getOwnerData(); 6094 Editable text = (Editable) editor.mTextView.getText(); 6095 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6096 } 6097 6098 @Override 6099 public void redo() { 6100 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6101 // Remove the old text and insert the new. 6102 Editor editor = getOwnerData(); 6103 Editable text = (Editable) editor.mTextView.getText(); 6104 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6105 } 6106 6107 /** 6108 * Attempts to merge this existing operation with a new edit. 6109 * @param edit The new edit operation. 6110 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6111 * object unchanged. 6112 */ 6113 private boolean mergeWith(EditOperation edit) { 6114 if (DEBUG_UNDO) { 6115 Log.d(TAG, "mergeWith old " + this); 6116 Log.d(TAG, "mergeWith new " + edit); 6117 } 6118 6119 if (mFrozen) { 6120 return false; 6121 } 6122 6123 switch (mType) { 6124 case TYPE_INSERT: 6125 return mergeInsertWith(edit); 6126 case TYPE_DELETE: 6127 return mergeDeleteWith(edit); 6128 case TYPE_REPLACE: 6129 return mergeReplaceWith(edit); 6130 default: 6131 return false; 6132 } 6133 } 6134 6135 private boolean mergeInsertWith(EditOperation edit) { 6136 if (edit.mType == TYPE_INSERT) { 6137 // Merge insertions that are contiguous even when it's frozen. 6138 if (getNewTextEnd() != edit.mStart) { 6139 return false; 6140 } 6141 mNewText += edit.mNewText; 6142 mNewCursorPos = edit.mNewCursorPos; 6143 mFrozen = edit.mFrozen; 6144 mIsComposition = edit.mIsComposition; 6145 return true; 6146 } 6147 if (mIsComposition && edit.mType == TYPE_REPLACE 6148 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6149 // Merge insertion with replace as they can be single insertion. 6150 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6151 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6152 mNewCursorPos = edit.mNewCursorPos; 6153 mIsComposition = edit.mIsComposition; 6154 return true; 6155 } 6156 return false; 6157 } 6158 6159 // TODO: Support forward delete. 6160 private boolean mergeDeleteWith(EditOperation edit) { 6161 // Only merge continuous deletes. 6162 if (edit.mType != TYPE_DELETE) { 6163 return false; 6164 } 6165 // Only merge deletions that are contiguous. 6166 if (mStart != edit.getOldTextEnd()) { 6167 return false; 6168 } 6169 mStart = edit.mStart; 6170 mOldText = edit.mOldText + mOldText; 6171 mNewCursorPos = edit.mNewCursorPos; 6172 mIsComposition = edit.mIsComposition; 6173 return true; 6174 } 6175 6176 private boolean mergeReplaceWith(EditOperation edit) { 6177 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6178 // Merge with adjacent insert. 6179 mNewText += edit.mNewText; 6180 mNewCursorPos = edit.mNewCursorPos; 6181 return true; 6182 } 6183 if (!mIsComposition) { 6184 return false; 6185 } 6186 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6187 && getNewTextEnd() >= edit.getOldTextEnd()) { 6188 // Merge with delete as they can be single operation. 6189 mNewText = mNewText.substring(0, edit.mStart - mStart) 6190 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6191 if (mNewText.isEmpty()) { 6192 mType = TYPE_DELETE; 6193 } 6194 mNewCursorPos = edit.mNewCursorPos; 6195 mIsComposition = edit.mIsComposition; 6196 return true; 6197 } 6198 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6199 && TextUtils.equals(mNewText, edit.mOldText)) { 6200 // Merge with the replace that replaces the same region. 6201 mNewText = edit.mNewText; 6202 mNewCursorPos = edit.mNewCursorPos; 6203 mIsComposition = edit.mIsComposition; 6204 return true; 6205 } 6206 return false; 6207 } 6208 6209 /** 6210 * Forcibly creates a single merged edit operation by simulating the entire text 6211 * contents being replaced. 6212 */ 6213 public void forceMergeWith(EditOperation edit) { 6214 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6215 if (mergeWith(edit)) { 6216 return; 6217 } 6218 Editor editor = getOwnerData(); 6219 6220 // Copy the text of the current field. 6221 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6222 // but would require two parallel implementations of modifyText() because Editable and 6223 // StringBuilder do not share an interface for replace/delete/insert. 6224 Editable editable = (Editable) editor.mTextView.getText(); 6225 Editable originalText = new SpannableStringBuilder(editable.toString()); 6226 6227 // Roll back the last operation. 6228 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6229 6230 // Clone the text again and apply the new operation. 6231 Editable finalText = new SpannableStringBuilder(editable.toString()); 6232 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6233 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6234 6235 // Convert this operation into a replace operation. 6236 mType = TYPE_REPLACE; 6237 mNewText = finalText.toString(); 6238 mOldText = originalText.toString(); 6239 mStart = 0; 6240 mNewCursorPos = edit.mNewCursorPos; 6241 mIsComposition = edit.mIsComposition; 6242 // mOldCursorPos is unchanged. 6243 } 6244 6245 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6246 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6247 // Apply the edit if it is still valid. 6248 if (isValidRange(text, deleteFrom, deleteTo) 6249 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6250 if (deleteFrom != deleteTo) { 6251 text.delete(deleteFrom, deleteTo); 6252 } 6253 if (newText.length() != 0) { 6254 text.insert(newTextInsertAt, newText); 6255 } 6256 } 6257 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6258 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6259 // TODO: Select all the text that was undone. 6260 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6261 Selection.setSelection(text, newCursorPos); 6262 } 6263 } 6264 6265 private String getTypeString() { 6266 switch (mType) { 6267 case TYPE_INSERT: 6268 return "insert"; 6269 case TYPE_DELETE: 6270 return "delete"; 6271 case TYPE_REPLACE: 6272 return "replace"; 6273 default: 6274 return ""; 6275 } 6276 } 6277 6278 @Override 6279 public String toString() { 6280 return "[mType=" + getTypeString() + ", " 6281 + "mOldText=" + mOldText + ", " 6282 + "mNewText=" + mNewText + ", " 6283 + "mStart=" + mStart + ", " 6284 + "mOldCursorPos=" + mOldCursorPos + ", " 6285 + "mNewCursorPos=" + mNewCursorPos + ", " 6286 + "mFrozen=" + mFrozen + ", " 6287 + "mIsComposition=" + mIsComposition + "]"; 6288 } 6289 6290 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6291 new Parcelable.ClassLoaderCreator<EditOperation>() { 6292 @Override 6293 public EditOperation createFromParcel(Parcel in) { 6294 return new EditOperation(in, null); 6295 } 6296 6297 @Override 6298 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6299 return new EditOperation(in, loader); 6300 } 6301 6302 @Override 6303 public EditOperation[] newArray(int size) { 6304 return new EditOperation[size]; 6305 } 6306 }; 6307 } 6308 6309 /** 6310 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6311 * These allow external applications to plug into currently selected text. 6312 */ 6313 static final class ProcessTextIntentActionsHandler { 6314 6315 private final Editor mEditor; 6316 private final TextView mTextView; 6317 private final Context mContext; 6318 private final PackageManager mPackageManager; 6319 private final String mPackageName; 6320 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6321 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6322 new SparseArray<>(); 6323 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6324 6325 private ProcessTextIntentActionsHandler(Editor editor) { 6326 mEditor = Preconditions.checkNotNull(editor); 6327 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6328 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6329 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6330 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6331 } 6332 6333 /** 6334 * Adds "PROCESS_TEXT" menu items to the specified menu. 6335 */ 6336 public void onInitializeMenu(Menu menu) { 6337 final int size = mSupportedActivities.size(); 6338 loadSupportedActivities(); 6339 for (int i = 0; i < size; i++) { 6340 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6341 menu.add(Menu.NONE, Menu.NONE, 6342 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6343 getLabel(resolveInfo)) 6344 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6345 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6346 } 6347 } 6348 6349 /** 6350 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6351 * menu item. 6352 * 6353 * @return True if the action was performed, false otherwise. 6354 */ 6355 public boolean performMenuItemAction(MenuItem item) { 6356 return fireIntent(item.getIntent()); 6357 } 6358 6359 /** 6360 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6361 */ 6362 public void initializeAccessibilityActions() { 6363 mAccessibilityIntents.clear(); 6364 mAccessibilityActions.clear(); 6365 int i = 0; 6366 loadSupportedActivities(); 6367 for (ResolveInfo resolveInfo : mSupportedActivities) { 6368 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6369 mAccessibilityActions.put( 6370 actionId, 6371 new AccessibilityNodeInfo.AccessibilityAction( 6372 actionId, getLabel(resolveInfo))); 6373 mAccessibilityIntents.put( 6374 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6375 } 6376 } 6377 6378 /** 6379 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6380 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6381 * latest accessibility actions available for this call. 6382 */ 6383 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6384 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6385 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6386 } 6387 } 6388 6389 /** 6390 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6391 * accessibility action id. 6392 * 6393 * @return True if the action was performed, false otherwise. 6394 */ 6395 public boolean performAccessibilityAction(int actionId) { 6396 return fireIntent(mAccessibilityIntents.get(actionId)); 6397 } 6398 6399 private boolean fireIntent(Intent intent) { 6400 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6401 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 6402 mEditor.mPreserveSelection = true; 6403 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6404 return true; 6405 } 6406 return false; 6407 } 6408 6409 private void loadSupportedActivities() { 6410 mSupportedActivities.clear(); 6411 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6412 List<ResolveInfo> unfiltered = 6413 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6414 for (ResolveInfo info : unfiltered) { 6415 if (isSupportedActivity(info)) { 6416 mSupportedActivities.add(info); 6417 } 6418 } 6419 } 6420 6421 private boolean isSupportedActivity(ResolveInfo info) { 6422 return mPackageName.equals(info.activityInfo.packageName) 6423 || info.activityInfo.exported 6424 && (info.activityInfo.permission == null 6425 || mContext.checkSelfPermission(info.activityInfo.permission) 6426 == PackageManager.PERMISSION_GRANTED); 6427 } 6428 6429 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6430 return createProcessTextIntent() 6431 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6432 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6433 } 6434 6435 private Intent createProcessTextIntent() { 6436 return new Intent() 6437 .setAction(Intent.ACTION_PROCESS_TEXT) 6438 .setType("text/plain"); 6439 } 6440 6441 private CharSequence getLabel(ResolveInfo resolveInfo) { 6442 return resolveInfo.loadLabel(mPackageManager); 6443 } 6444 } 6445} 6446