Editor.java revision 1d77557517918258cbf4264e647a138d1b9b648f
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_SELECT_ALL = 8; 158 private static final int MENU_ITEM_ORDER_REPLACE = 9; 159 private static final int MENU_ITEM_ORDER_AUTOFILL = 10; 160 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 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 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 // This classifies the text and most likely returns before the toolbar is actually 1409 // shown. If not, it will update the toolbar with the result when classification 1410 // returns. We would rather not wait for a long running classification process. 1411 invalidateActionModeAsync(); 1412 } 1413 } 1414 1415 public void beginBatchEdit() { 1416 mInBatchEditControllers = true; 1417 final InputMethodState ims = mInputMethodState; 1418 if (ims != null) { 1419 int nesting = ++ims.mBatchEditNesting; 1420 if (nesting == 1) { 1421 ims.mCursorChanged = false; 1422 ims.mChangedDelta = 0; 1423 if (ims.mContentChanged) { 1424 // We already have a pending change from somewhere else, 1425 // so turn this into a full update. 1426 ims.mChangedStart = 0; 1427 ims.mChangedEnd = mTextView.getText().length(); 1428 } else { 1429 ims.mChangedStart = EXTRACT_UNKNOWN; 1430 ims.mChangedEnd = EXTRACT_UNKNOWN; 1431 ims.mContentChanged = false; 1432 } 1433 mUndoInputFilter.beginBatchEdit(); 1434 mTextView.onBeginBatchEdit(); 1435 } 1436 } 1437 } 1438 1439 public void endBatchEdit() { 1440 mInBatchEditControllers = false; 1441 final InputMethodState ims = mInputMethodState; 1442 if (ims != null) { 1443 int nesting = --ims.mBatchEditNesting; 1444 if (nesting == 0) { 1445 finishBatchEdit(ims); 1446 } 1447 } 1448 } 1449 1450 void ensureEndedBatchEdit() { 1451 final InputMethodState ims = mInputMethodState; 1452 if (ims != null && ims.mBatchEditNesting != 0) { 1453 ims.mBatchEditNesting = 0; 1454 finishBatchEdit(ims); 1455 } 1456 } 1457 1458 void finishBatchEdit(final InputMethodState ims) { 1459 mTextView.onEndBatchEdit(); 1460 mUndoInputFilter.endBatchEdit(); 1461 1462 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1463 mTextView.updateAfterEdit(); 1464 reportExtractedText(); 1465 } else if (ims.mCursorChanged) { 1466 // Cheesy way to get us to report the current cursor location. 1467 mTextView.invalidateCursor(); 1468 } 1469 // sendUpdateSelection knows to avoid sending if the selection did 1470 // not actually change. 1471 sendUpdateSelection(); 1472 1473 // Show drag handles if they were blocked by batch edit mode. 1474 if (mTextActionMode != null) { 1475 final CursorController cursorController = mTextView.hasSelection() 1476 ? getSelectionController() : getInsertionController(); 1477 if (cursorController != null && !cursorController.isActive() 1478 && !cursorController.isCursorBeingModified()) { 1479 cursorController.show(); 1480 } 1481 } 1482 } 1483 1484 static final int EXTRACT_NOTHING = -2; 1485 static final int EXTRACT_UNKNOWN = -1; 1486 1487 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1488 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1489 EXTRACT_UNKNOWN, outText); 1490 } 1491 1492 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1493 int partialStartOffset, int partialEndOffset, int delta, 1494 @Nullable ExtractedText outText) { 1495 if (request == null || outText == null) { 1496 return false; 1497 } 1498 1499 final CharSequence content = mTextView.getText(); 1500 if (content == null) { 1501 return false; 1502 } 1503 1504 if (partialStartOffset != EXTRACT_NOTHING) { 1505 final int N = content.length(); 1506 if (partialStartOffset < 0) { 1507 outText.partialStartOffset = outText.partialEndOffset = -1; 1508 partialStartOffset = 0; 1509 partialEndOffset = N; 1510 } else { 1511 // Now use the delta to determine the actual amount of text 1512 // we need. 1513 partialEndOffset += delta; 1514 // Adjust offsets to ensure we contain full spans. 1515 if (content instanceof Spanned) { 1516 Spanned spanned = (Spanned) content; 1517 Object[] spans = spanned.getSpans(partialStartOffset, 1518 partialEndOffset, ParcelableSpan.class); 1519 int i = spans.length; 1520 while (i > 0) { 1521 i--; 1522 int j = spanned.getSpanStart(spans[i]); 1523 if (j < partialStartOffset) partialStartOffset = j; 1524 j = spanned.getSpanEnd(spans[i]); 1525 if (j > partialEndOffset) partialEndOffset = j; 1526 } 1527 } 1528 outText.partialStartOffset = partialStartOffset; 1529 outText.partialEndOffset = partialEndOffset - delta; 1530 1531 if (partialStartOffset > N) { 1532 partialStartOffset = N; 1533 } else if (partialStartOffset < 0) { 1534 partialStartOffset = 0; 1535 } 1536 if (partialEndOffset > N) { 1537 partialEndOffset = N; 1538 } else if (partialEndOffset < 0) { 1539 partialEndOffset = 0; 1540 } 1541 } 1542 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1543 outText.text = content.subSequence(partialStartOffset, 1544 partialEndOffset); 1545 } else { 1546 outText.text = TextUtils.substring(content, partialStartOffset, 1547 partialEndOffset); 1548 } 1549 } else { 1550 outText.partialStartOffset = 0; 1551 outText.partialEndOffset = 0; 1552 outText.text = ""; 1553 } 1554 outText.flags = 0; 1555 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1556 outText.flags |= ExtractedText.FLAG_SELECTING; 1557 } 1558 if (mTextView.isSingleLine()) { 1559 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1560 } 1561 outText.startOffset = 0; 1562 outText.selectionStart = mTextView.getSelectionStart(); 1563 outText.selectionEnd = mTextView.getSelectionEnd(); 1564 return true; 1565 } 1566 1567 boolean reportExtractedText() { 1568 final Editor.InputMethodState ims = mInputMethodState; 1569 if (ims != null) { 1570 final boolean contentChanged = ims.mContentChanged; 1571 if (contentChanged || ims.mSelectionModeChanged) { 1572 ims.mContentChanged = false; 1573 ims.mSelectionModeChanged = false; 1574 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1575 if (req != null) { 1576 InputMethodManager imm = InputMethodManager.peekInstance(); 1577 if (imm != null) { 1578 if (TextView.DEBUG_EXTRACT) { 1579 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1580 + ims.mChangedStart 1581 + " end=" + ims.mChangedEnd 1582 + " delta=" + ims.mChangedDelta); 1583 } 1584 if (ims.mChangedStart < 0 && !contentChanged) { 1585 ims.mChangedStart = EXTRACT_NOTHING; 1586 } 1587 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1588 ims.mChangedDelta, ims.mExtractedText)) { 1589 if (TextView.DEBUG_EXTRACT) { 1590 Log.v(TextView.LOG_TAG, 1591 "Reporting extracted start=" 1592 + ims.mExtractedText.partialStartOffset 1593 + " end=" + ims.mExtractedText.partialEndOffset 1594 + ": " + ims.mExtractedText.text); 1595 } 1596 1597 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1598 ims.mChangedStart = EXTRACT_UNKNOWN; 1599 ims.mChangedEnd = EXTRACT_UNKNOWN; 1600 ims.mChangedDelta = 0; 1601 ims.mContentChanged = false; 1602 return true; 1603 } 1604 } 1605 } 1606 } 1607 } 1608 return false; 1609 } 1610 1611 private void sendUpdateSelection() { 1612 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1613 final InputMethodManager imm = InputMethodManager.peekInstance(); 1614 if (null != imm) { 1615 final int selectionStart = mTextView.getSelectionStart(); 1616 final int selectionEnd = mTextView.getSelectionEnd(); 1617 int candStart = -1; 1618 int candEnd = -1; 1619 if (mTextView.getText() instanceof Spannable) { 1620 final Spannable sp = (Spannable) mTextView.getText(); 1621 candStart = EditableInputConnection.getComposingSpanStart(sp); 1622 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1623 } 1624 // InputMethodManager#updateSelection skips sending the message if 1625 // none of the parameters have changed since the last time we called it. 1626 imm.updateSelection(mTextView, 1627 selectionStart, selectionEnd, candStart, candEnd); 1628 } 1629 } 1630 } 1631 1632 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1633 int cursorOffsetVertical) { 1634 final int selectionStart = mTextView.getSelectionStart(); 1635 final int selectionEnd = mTextView.getSelectionEnd(); 1636 1637 final InputMethodState ims = mInputMethodState; 1638 if (ims != null && ims.mBatchEditNesting == 0) { 1639 InputMethodManager imm = InputMethodManager.peekInstance(); 1640 if (imm != null) { 1641 if (imm.isActive(mTextView)) { 1642 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1643 // We are in extract mode and the content has changed 1644 // in some way... just report complete new text to the 1645 // input method. 1646 reportExtractedText(); 1647 } 1648 } 1649 } 1650 } 1651 1652 if (mCorrectionHighlighter != null) { 1653 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1654 } 1655 1656 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1657 drawCursor(canvas, cursorOffsetVertical); 1658 // Rely on the drawable entirely, do not draw the cursor line. 1659 // Has to be done after the IMM related code above which relies on the highlight. 1660 highlight = null; 1661 } 1662 1663 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1664 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1665 cursorOffsetVertical); 1666 } else { 1667 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1668 } 1669 } 1670 1671 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1672 Paint highlightPaint, int cursorOffsetVertical) { 1673 final long lineRange = layout.getLineRangeForDraw(canvas); 1674 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1675 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1676 if (lastLine < 0) return; 1677 1678 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1679 firstLine, lastLine); 1680 1681 if (layout instanceof DynamicLayout) { 1682 if (mTextRenderNodes == null) { 1683 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1684 } 1685 1686 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1687 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1688 int[] blockIndices = dynamicLayout.getBlockIndices(); 1689 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1690 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1691 1692 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1693 if (blockSet != null) { 1694 for (int i = 0; i < blockSet.size(); i++) { 1695 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1696 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1697 && mTextRenderNodes[blockIndex] != null) { 1698 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1699 } 1700 } 1701 } 1702 1703 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1704 if (startBlock < 0) { 1705 startBlock = -(startBlock + 1); 1706 } 1707 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1708 1709 int startIndexToFindAvailableRenderNode = 0; 1710 int lastIndex = numberOfBlocks; 1711 1712 for (int i = startBlock; i < numberOfBlocks; i++) { 1713 final int blockIndex = blockIndices[i]; 1714 if (i >= indexFirstChangedBlock 1715 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1716 && mTextRenderNodes[blockIndex] != null) { 1717 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1718 } 1719 if (blockEndLines[i] < firstLine) { 1720 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1721 // be redrawn after they get scrolled into drawing range. 1722 continue; 1723 } 1724 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1725 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1726 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1727 if (blockEndLines[i] >= lastLine) { 1728 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1729 break; 1730 } 1731 } 1732 if (blockSet != null) { 1733 for (int i = 0; i < blockSet.size(); i++) { 1734 final int block = blockSet.valueAt(i); 1735 final int blockIndex = dynamicLayout.getBlockIndex(block); 1736 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1737 || mTextRenderNodes[blockIndex] == null 1738 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1739 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1740 layout, highlight, highlightPaint, cursorOffsetVertical, 1741 blockEndLines, blockIndices, block, numberOfBlocks, 1742 startIndexToFindAvailableRenderNode); 1743 } 1744 } 1745 } 1746 1747 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1748 } else { 1749 // Boring layout is used for empty and hint text 1750 layout.drawText(canvas, firstLine, lastLine); 1751 } 1752 } 1753 1754 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1755 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1756 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1757 int startIndexToFindAvailableRenderNode) { 1758 final int blockEndLine = blockEndLines[blockInfoIndex]; 1759 int blockIndex = blockIndices[blockInfoIndex]; 1760 1761 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1762 if (blockIsInvalid) { 1763 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1764 startIndexToFindAvailableRenderNode); 1765 // Note how dynamic layout's internal block indices get updated from Editor 1766 blockIndices[blockInfoIndex] = blockIndex; 1767 if (mTextRenderNodes[blockIndex] != null) { 1768 mTextRenderNodes[blockIndex].isDirty = true; 1769 } 1770 startIndexToFindAvailableRenderNode = blockIndex + 1; 1771 } 1772 1773 if (mTextRenderNodes[blockIndex] == null) { 1774 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1775 } 1776 1777 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1778 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1779 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1780 final int blockBeginLine = blockInfoIndex == 0 ? 1781 0 : blockEndLines[blockInfoIndex - 1] + 1; 1782 final int top = layout.getLineTop(blockBeginLine); 1783 final int bottom = layout.getLineBottom(blockEndLine); 1784 int left = 0; 1785 int right = mTextView.getWidth(); 1786 if (mTextView.getHorizontallyScrolling()) { 1787 float min = Float.MAX_VALUE; 1788 float max = Float.MIN_VALUE; 1789 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1790 min = Math.min(min, layout.getLineLeft(line)); 1791 max = Math.max(max, layout.getLineRight(line)); 1792 } 1793 left = (int) min; 1794 right = (int) (max + 0.5f); 1795 } 1796 1797 // Rebuild display list if it is invalid 1798 if (blockDisplayListIsInvalid) { 1799 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1800 right - left, bottom - top); 1801 try { 1802 // drawText is always relative to TextView's origin, this translation 1803 // brings this range of text back to the top left corner of the viewport 1804 displayListCanvas.translate(-left, -top); 1805 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1806 mTextRenderNodes[blockIndex].isDirty = false; 1807 // No need to untranslate, previous context is popped after 1808 // drawDisplayList 1809 } finally { 1810 blockDisplayList.end(displayListCanvas); 1811 // Same as drawDisplayList below, handled by our TextView's parent 1812 blockDisplayList.setClipToBounds(false); 1813 } 1814 } 1815 1816 // Valid display list only needs to update its drawing location. 1817 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1818 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1819 } 1820 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1821 return startIndexToFindAvailableRenderNode; 1822 } 1823 1824 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1825 int searchStartIndex) { 1826 int length = mTextRenderNodes.length; 1827 for (int i = searchStartIndex; i < length; i++) { 1828 boolean blockIndexFound = false; 1829 for (int j = 0; j < numberOfBlocks; j++) { 1830 if (blockIndices[j] == i) { 1831 blockIndexFound = true; 1832 break; 1833 } 1834 } 1835 if (blockIndexFound) continue; 1836 return i; 1837 } 1838 1839 // No available index found, the pool has to grow 1840 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1841 return length; 1842 } 1843 1844 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1845 final boolean translate = cursorOffsetVertical != 0; 1846 if (translate) canvas.translate(0, cursorOffsetVertical); 1847 for (int i = 0; i < mCursorCount; i++) { 1848 mCursorDrawable[i].draw(canvas); 1849 } 1850 if (translate) canvas.translate(0, -cursorOffsetVertical); 1851 } 1852 1853 void invalidateHandlesAndActionMode() { 1854 if (mSelectionModifierCursorController != null) { 1855 mSelectionModifierCursorController.invalidateHandles(); 1856 } 1857 if (mInsertionPointCursorController != null) { 1858 mInsertionPointCursorController.invalidateHandle(); 1859 } 1860 if (mTextActionMode != null) { 1861 invalidateActionMode(); 1862 } 1863 } 1864 1865 /** 1866 * Invalidates all the sub-display lists that overlap the specified character range 1867 */ 1868 void invalidateTextDisplayList(Layout layout, int start, int end) { 1869 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1870 final int firstLine = layout.getLineForOffset(start); 1871 final int lastLine = layout.getLineForOffset(end); 1872 1873 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1874 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1875 int[] blockIndices = dynamicLayout.getBlockIndices(); 1876 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1877 1878 int i = 0; 1879 // Skip the blocks before firstLine 1880 while (i < numberOfBlocks) { 1881 if (blockEndLines[i] >= firstLine) break; 1882 i++; 1883 } 1884 1885 // Invalidate all subsequent blocks until lastLine is passed 1886 while (i < numberOfBlocks) { 1887 final int blockIndex = blockIndices[i]; 1888 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1889 mTextRenderNodes[blockIndex].isDirty = true; 1890 } 1891 if (blockEndLines[i] >= lastLine) break; 1892 i++; 1893 } 1894 } 1895 } 1896 1897 void invalidateTextDisplayList() { 1898 if (mTextRenderNodes != null) { 1899 for (int i = 0; i < mTextRenderNodes.length; i++) { 1900 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1901 } 1902 } 1903 } 1904 1905 void updateCursorsPositions() { 1906 if (mTextView.mCursorDrawableRes == 0) { 1907 mCursorCount = 0; 1908 return; 1909 } 1910 1911 Layout layout = mTextView.getLayout(); 1912 final int offset = mTextView.getSelectionStart(); 1913 final int line = layout.getLineForOffset(offset); 1914 final int top = layout.getLineTop(line); 1915 final int bottom = layout.getLineTop(line + 1); 1916 1917 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1918 1919 int middle = bottom; 1920 if (mCursorCount == 2) { 1921 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1922 middle = (top + bottom) >> 1; 1923 } 1924 1925 boolean clamped = layout.shouldClampCursor(line); 1926 updateCursorPosition(0, top, middle, layout.getPrimaryHorizontal(offset, clamped)); 1927 1928 if (mCursorCount == 2) { 1929 updateCursorPosition(1, middle, bottom, layout.getSecondaryHorizontal(offset, clamped)); 1930 } 1931 } 1932 1933 void refreshTextActionMode() { 1934 if (extractedTextModeWillBeStarted()) { 1935 mRestartActionModeOnNextRefresh = false; 1936 return; 1937 } 1938 final boolean hasSelection = mTextView.hasSelection(); 1939 final SelectionModifierCursorController selectionController = getSelectionController(); 1940 final InsertionPointCursorController insertionController = getInsertionController(); 1941 if ((selectionController != null && selectionController.isCursorBeingModified()) 1942 || (insertionController != null && insertionController.isCursorBeingModified())) { 1943 // ActionMode should be managed by the currently active cursor controller. 1944 mRestartActionModeOnNextRefresh = false; 1945 return; 1946 } 1947 if (hasSelection) { 1948 hideInsertionPointCursorController(); 1949 if (mTextActionMode == null) { 1950 if (mRestartActionModeOnNextRefresh) { 1951 // To avoid distraction, newly start action mode only when selection action 1952 // mode is being restarted. 1953 startSelectionActionModeAsync(false); 1954 } 1955 } else if (selectionController == null || !selectionController.isActive()) { 1956 // Insertion action mode is active. Avoid dismissing the selection. 1957 stopTextActionModeWithPreservingSelection(); 1958 startSelectionActionModeAsync(false); 1959 } else { 1960 mTextActionMode.invalidateContentRect(); 1961 } 1962 } else { 1963 // Insertion action mode is started only when insertion controller is explicitly 1964 // activated. 1965 if (insertionController == null || !insertionController.isActive()) { 1966 stopTextActionMode(); 1967 } else if (mTextActionMode != null) { 1968 mTextActionMode.invalidateContentRect(); 1969 } 1970 } 1971 mRestartActionModeOnNextRefresh = false; 1972 } 1973 1974 /** 1975 * Start an Insertion action mode. 1976 */ 1977 void startInsertionActionMode() { 1978 if (mInsertionActionModeRunnable != null) { 1979 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1980 } 1981 if (extractedTextModeWillBeStarted()) { 1982 return; 1983 } 1984 stopTextActionMode(); 1985 1986 ActionMode.Callback actionModeCallback = 1987 new TextActionModeCallback(false /* hasSelection */); 1988 mTextActionMode = mTextView.startActionMode( 1989 actionModeCallback, ActionMode.TYPE_FLOATING); 1990 if (mTextActionMode != null && getInsertionController() != null) { 1991 getInsertionController().show(); 1992 } 1993 } 1994 1995 @NonNull 1996 TextView getTextView() { 1997 return mTextView; 1998 } 1999 2000 @Nullable 2001 ActionMode getTextActionMode() { 2002 return mTextActionMode; 2003 } 2004 2005 void setRestartActionModeOnNextRefresh(boolean value) { 2006 mRestartActionModeOnNextRefresh = value; 2007 } 2008 2009 /** 2010 * Asynchronously starts a selection action mode using the TextClassifier. 2011 */ 2012 void startSelectionActionModeAsync(boolean adjustSelection) { 2013 getSelectionActionModeHelper().startActionModeAsync(adjustSelection); 2014 } 2015 2016 /** 2017 * Asynchronously invalidates an action mode using the TextClassifier. 2018 */ 2019 private void invalidateActionModeAsync() { 2020 getSelectionActionModeHelper().invalidateActionModeAsync(); 2021 } 2022 2023 /** 2024 * Synchronously invalidates an action mode without the TextClassifier. 2025 */ 2026 private void invalidateActionMode() { 2027 if (mTextActionMode != null) { 2028 mTextActionMode.invalidate(); 2029 } 2030 } 2031 2032 private SelectionActionModeHelper getSelectionActionModeHelper() { 2033 if (mSelectionActionModeHelper == null) { 2034 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2035 } 2036 return mSelectionActionModeHelper; 2037 } 2038 2039 /** 2040 * If the TextView allows text selection, selects the current word when no existing selection 2041 * was available and starts a drag. 2042 * 2043 * @return true if the drag was started. 2044 */ 2045 private boolean selectCurrentWordAndStartDrag() { 2046 if (mInsertionActionModeRunnable != null) { 2047 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2048 } 2049 if (extractedTextModeWillBeStarted()) { 2050 return false; 2051 } 2052 if (!checkField()) { 2053 return false; 2054 } 2055 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2056 // No selection and cannot select a word. 2057 return false; 2058 } 2059 stopTextActionModeWithPreservingSelection(); 2060 getSelectionController().enterDrag( 2061 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2062 return true; 2063 } 2064 2065 /** 2066 * Checks whether a selection can be performed on the current TextView. 2067 * 2068 * @return true if a selection can be performed 2069 */ 2070 boolean checkField() { 2071 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2072 Log.w(TextView.LOG_TAG, 2073 "TextView does not support text selection. Selection cancelled."); 2074 return false; 2075 } 2076 return true; 2077 } 2078 2079 boolean startSelectionActionModeInternal() { 2080 if (extractedTextModeWillBeStarted()) { 2081 return false; 2082 } 2083 if (mTextActionMode != null) { 2084 // Text action mode is already started 2085 invalidateActionMode(); 2086 return false; 2087 } 2088 2089 if (!checkField() || !mTextView.hasSelection()) { 2090 return false; 2091 } 2092 2093 ActionMode.Callback actionModeCallback = 2094 new TextActionModeCallback(true /* hasSelection */); 2095 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2096 2097 final boolean selectionStarted = mTextActionMode != null; 2098 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2099 // Show the IME to be able to replace text, except when selecting non editable text. 2100 final InputMethodManager imm = InputMethodManager.peekInstance(); 2101 if (imm != null) { 2102 imm.showSoftInput(mTextView, 0, null); 2103 } 2104 } 2105 return selectionStarted; 2106 } 2107 2108 private boolean extractedTextModeWillBeStarted() { 2109 if (!(mTextView.isInExtractedMode())) { 2110 final InputMethodManager imm = InputMethodManager.peekInstance(); 2111 return imm != null && imm.isFullscreenMode(); 2112 } 2113 return false; 2114 } 2115 2116 /** 2117 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2118 * the current cursor position or selection range. This method is consistent with the 2119 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2120 */ 2121 private boolean shouldOfferToShowSuggestions() { 2122 CharSequence text = mTextView.getText(); 2123 if (!(text instanceof Spannable)) return false; 2124 2125 final Spannable spannable = (Spannable) text; 2126 final int selectionStart = mTextView.getSelectionStart(); 2127 final int selectionEnd = mTextView.getSelectionEnd(); 2128 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2129 SuggestionSpan.class); 2130 if (suggestionSpans.length == 0) { 2131 return false; 2132 } 2133 if (selectionStart == selectionEnd) { 2134 // Spans overlap the cursor. 2135 for (int i = 0; i < suggestionSpans.length; i++) { 2136 if (suggestionSpans[i].getSuggestions().length > 0) { 2137 return true; 2138 } 2139 } 2140 return false; 2141 } 2142 int minSpanStart = mTextView.getText().length(); 2143 int maxSpanEnd = 0; 2144 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2145 int unionOfSpansCoveringSelectionStartEnd = 0; 2146 boolean hasValidSuggestions = false; 2147 for (int i = 0; i < suggestionSpans.length; i++) { 2148 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2149 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2150 minSpanStart = Math.min(minSpanStart, spanStart); 2151 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2152 if (selectionStart < spanStart || selectionStart > spanEnd) { 2153 // The span doesn't cover the current selection start point. 2154 continue; 2155 } 2156 hasValidSuggestions = 2157 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2158 unionOfSpansCoveringSelectionStartStart = 2159 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2160 unionOfSpansCoveringSelectionStartEnd = 2161 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2162 } 2163 if (!hasValidSuggestions) { 2164 return false; 2165 } 2166 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2167 // No spans cover the selection start point. 2168 return false; 2169 } 2170 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2171 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2172 // There is a span that is not covered by the union. In this case, we soouldn't offer 2173 // to show suggestions as it's confusing. 2174 return false; 2175 } 2176 return true; 2177 } 2178 2179 /** 2180 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2181 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2182 */ 2183 private boolean isCursorInsideEasyCorrectionSpan() { 2184 Spannable spannable = (Spannable) mTextView.getText(); 2185 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2186 mTextView.getSelectionEnd(), SuggestionSpan.class); 2187 for (int i = 0; i < suggestionSpans.length; i++) { 2188 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2189 return true; 2190 } 2191 } 2192 return false; 2193 } 2194 2195 void onTouchUpEvent(MotionEvent event) { 2196 if (getSelectionActionModeHelper().resetSelection( 2197 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2198 return; 2199 } 2200 2201 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2202 hideCursorAndSpanControllers(); 2203 stopTextActionMode(); 2204 CharSequence text = mTextView.getText(); 2205 if (!selectAllGotFocus && text.length() > 0) { 2206 // Move cursor 2207 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2208 Selection.setSelection((Spannable) text, offset); 2209 if (mSpellChecker != null) { 2210 // When the cursor moves, the word that was typed may need spell check 2211 mSpellChecker.onSelectionChanged(); 2212 } 2213 2214 if (!extractedTextModeWillBeStarted()) { 2215 if (isCursorInsideEasyCorrectionSpan()) { 2216 // Cancel the single tap delayed runnable. 2217 if (mInsertionActionModeRunnable != null) { 2218 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2219 } 2220 2221 mShowSuggestionRunnable = new Runnable() { 2222 public void run() { 2223 replace(); 2224 } 2225 }; 2226 // removeCallbacks is performed on every touch 2227 mTextView.postDelayed(mShowSuggestionRunnable, 2228 ViewConfiguration.getDoubleTapTimeout()); 2229 } else if (hasInsertionController()) { 2230 getInsertionController().show(); 2231 } 2232 } 2233 } 2234 } 2235 2236 protected void stopTextActionMode() { 2237 if (mTextActionMode != null) { 2238 // This will hide the mSelectionModifierCursorController 2239 mTextActionMode.finish(); 2240 } 2241 } 2242 2243 private void stopTextActionModeWithPreservingSelection() { 2244 if (mTextActionMode != null) { 2245 mRestartActionModeOnNextRefresh = true; 2246 } 2247 mPreserveSelection = true; 2248 stopTextActionMode(); 2249 mPreserveSelection = false; 2250 } 2251 2252 /** 2253 * @return True if this view supports insertion handles. 2254 */ 2255 boolean hasInsertionController() { 2256 return mInsertionControllerEnabled; 2257 } 2258 2259 /** 2260 * @return True if this view supports selection handles. 2261 */ 2262 boolean hasSelectionController() { 2263 return mSelectionControllerEnabled; 2264 } 2265 2266 private InsertionPointCursorController getInsertionController() { 2267 if (!mInsertionControllerEnabled) { 2268 return null; 2269 } 2270 2271 if (mInsertionPointCursorController == null) { 2272 mInsertionPointCursorController = new InsertionPointCursorController(); 2273 2274 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2275 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2276 } 2277 2278 return mInsertionPointCursorController; 2279 } 2280 2281 @Nullable 2282 SelectionModifierCursorController getSelectionController() { 2283 if (!mSelectionControllerEnabled) { 2284 return null; 2285 } 2286 2287 if (mSelectionModifierCursorController == null) { 2288 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2289 2290 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2291 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2292 } 2293 2294 return mSelectionModifierCursorController; 2295 } 2296 2297 @VisibleForTesting 2298 public Drawable[] getCursorDrawable() { 2299 return mCursorDrawable; 2300 } 2301 2302 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2303 if (mCursorDrawable[cursorIndex] == null) { 2304 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2305 mTextView.mCursorDrawableRes); 2306 } 2307 final Drawable drawable = mCursorDrawable[cursorIndex]; 2308 final int left = clampHorizontalPosition(drawable, horizontal); 2309 final int width = drawable.getIntrinsicWidth(); 2310 drawable.setBounds(left, top - mTempRect.top, left + width, 2311 bottom + mTempRect.bottom); 2312 } 2313 2314 /** 2315 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2316 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2317 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2318 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2319 * of the view. 2320 * 2321 * @param drawable Drawable. Can be null. 2322 * @param horizontal Horizontal position for the drawable. 2323 * @return The clamped horizontal position for the drawable. 2324 */ 2325 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2326 horizontal = Math.max(0.5f, horizontal - 0.5f); 2327 if (mTempRect == null) mTempRect = new Rect(); 2328 2329 int drawableWidth = 0; 2330 if (drawable != null) { 2331 drawable.getPadding(mTempRect); 2332 drawableWidth = drawable.getIntrinsicWidth(); 2333 } else { 2334 mTempRect.setEmpty(); 2335 } 2336 2337 int scrollX = mTextView.getScrollX(); 2338 float horizontalDiff = horizontal - scrollX; 2339 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2340 - mTextView.getCompoundPaddingRight(); 2341 2342 final int left; 2343 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2344 // at the rightmost position 2345 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2346 } else if (Math.abs(horizontalDiff) <= 1f 2347 || (TextUtils.isEmpty(mTextView.getText()) 2348 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2349 && horizontal <= 1f)) { 2350 // at the leftmost position 2351 left = scrollX - mTempRect.left; 2352 } else { 2353 left = (int) horizontal - mTempRect.left; 2354 } 2355 return left; 2356 } 2357 2358 /** 2359 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2360 * a dictionary) from the current input method, provided by it calling 2361 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2362 * implementation flashes the background of the corrected word to provide feedback to the user. 2363 * 2364 * @param info The auto correct info about the text that was corrected. 2365 */ 2366 public void onCommitCorrection(CorrectionInfo info) { 2367 if (mCorrectionHighlighter == null) { 2368 mCorrectionHighlighter = new CorrectionHighlighter(); 2369 } else { 2370 mCorrectionHighlighter.invalidate(false); 2371 } 2372 2373 mCorrectionHighlighter.highlight(info); 2374 mUndoInputFilter.freezeLastEdit(); 2375 } 2376 2377 void onScrollChanged() { 2378 if (mPositionListener != null) { 2379 mPositionListener.onScrollChanged(); 2380 } 2381 if (mTextActionMode != null) { 2382 mTextActionMode.invalidateContentRect(); 2383 } 2384 } 2385 2386 /** 2387 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2388 */ 2389 private boolean shouldBlink() { 2390 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2391 2392 final int start = mTextView.getSelectionStart(); 2393 if (start < 0) return false; 2394 2395 final int end = mTextView.getSelectionEnd(); 2396 if (end < 0) return false; 2397 2398 return start == end; 2399 } 2400 2401 void makeBlink() { 2402 if (shouldBlink()) { 2403 mShowCursor = SystemClock.uptimeMillis(); 2404 if (mBlink == null) mBlink = new Blink(); 2405 mTextView.removeCallbacks(mBlink); 2406 mTextView.postDelayed(mBlink, BLINK); 2407 } else { 2408 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2409 } 2410 } 2411 2412 private class Blink implements Runnable { 2413 private boolean mCancelled; 2414 2415 public void run() { 2416 if (mCancelled) { 2417 return; 2418 } 2419 2420 mTextView.removeCallbacks(this); 2421 2422 if (shouldBlink()) { 2423 if (mTextView.getLayout() != null) { 2424 mTextView.invalidateCursorPath(); 2425 } 2426 2427 mTextView.postDelayed(this, BLINK); 2428 } 2429 } 2430 2431 void cancel() { 2432 if (!mCancelled) { 2433 mTextView.removeCallbacks(this); 2434 mCancelled = true; 2435 } 2436 } 2437 2438 void uncancel() { 2439 mCancelled = false; 2440 } 2441 } 2442 2443 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2444 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2445 com.android.internal.R.layout.text_drag_thumbnail, null); 2446 2447 if (shadowView == null) { 2448 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2449 } 2450 2451 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2452 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2453 end = TextUtils.unpackRangeEndFromLong(range); 2454 } 2455 final CharSequence text = mTextView.getTransformedText(start, end); 2456 shadowView.setText(text); 2457 shadowView.setTextColor(mTextView.getTextColors()); 2458 2459 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2460 shadowView.setGravity(Gravity.CENTER); 2461 2462 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2463 ViewGroup.LayoutParams.WRAP_CONTENT)); 2464 2465 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2466 shadowView.measure(size, size); 2467 2468 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2469 shadowView.invalidate(); 2470 return new DragShadowBuilder(shadowView); 2471 } 2472 2473 private static class DragLocalState { 2474 public TextView sourceTextView; 2475 public int start, end; 2476 2477 public DragLocalState(TextView sourceTextView, int start, int end) { 2478 this.sourceTextView = sourceTextView; 2479 this.start = start; 2480 this.end = end; 2481 } 2482 } 2483 2484 void onDrop(DragEvent event) { 2485 SpannableStringBuilder content = new SpannableStringBuilder(); 2486 2487 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2488 if (permissions != null) { 2489 permissions.takeTransient(); 2490 } 2491 2492 try { 2493 ClipData clipData = event.getClipData(); 2494 final int itemCount = clipData.getItemCount(); 2495 for (int i = 0; i < itemCount; i++) { 2496 Item item = clipData.getItemAt(i); 2497 content.append(item.coerceToStyledText(mTextView.getContext())); 2498 } 2499 } finally { 2500 if (permissions != null) { 2501 permissions.release(); 2502 } 2503 } 2504 2505 mTextView.beginBatchEdit(); 2506 mUndoInputFilter.freezeLastEdit(); 2507 try { 2508 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2509 Object localState = event.getLocalState(); 2510 DragLocalState dragLocalState = null; 2511 if (localState instanceof DragLocalState) { 2512 dragLocalState = (DragLocalState) localState; 2513 } 2514 boolean dragDropIntoItself = dragLocalState != null 2515 && dragLocalState.sourceTextView == mTextView; 2516 2517 if (dragDropIntoItself) { 2518 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2519 // A drop inside the original selection discards the drop. 2520 return; 2521 } 2522 } 2523 2524 final int originalLength = mTextView.getText().length(); 2525 int min = offset; 2526 int max = offset; 2527 2528 Selection.setSelection((Spannable) mTextView.getText(), max); 2529 mTextView.replaceText_internal(min, max, content); 2530 2531 if (dragDropIntoItself) { 2532 int dragSourceStart = dragLocalState.start; 2533 int dragSourceEnd = dragLocalState.end; 2534 if (max <= dragSourceStart) { 2535 // Inserting text before selection has shifted positions 2536 final int shift = mTextView.getText().length() - originalLength; 2537 dragSourceStart += shift; 2538 dragSourceEnd += shift; 2539 } 2540 2541 // Delete original selection 2542 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2543 2544 // Make sure we do not leave two adjacent spaces. 2545 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2546 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2547 if (nextCharIdx > prevCharIdx + 1) { 2548 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2549 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2550 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2551 } 2552 } 2553 } 2554 } finally { 2555 mTextView.endBatchEdit(); 2556 mUndoInputFilter.freezeLastEdit(); 2557 } 2558 } 2559 2560 public void addSpanWatchers(Spannable text) { 2561 final int textLength = text.length(); 2562 2563 if (mKeyListener != null) { 2564 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2565 } 2566 2567 if (mSpanController == null) { 2568 mSpanController = new SpanController(); 2569 } 2570 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2571 } 2572 2573 void setContextMenuAnchor(float x, float y) { 2574 mContextMenuAnchorX = x; 2575 mContextMenuAnchorY = y; 2576 } 2577 2578 void onCreateContextMenu(ContextMenu menu) { 2579 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2580 || Float.isNaN(mContextMenuAnchorY)) { 2581 return; 2582 } 2583 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2584 if (offset == -1) { 2585 return; 2586 } 2587 stopTextActionModeWithPreservingSelection(); 2588 final boolean isOnSelection = mTextView.hasSelection() 2589 && offset >= mTextView.getSelectionStart() && offset <= mTextView.getSelectionEnd(); 2590 if (!isOnSelection) { 2591 // Right clicked position is not on the selection. Remove the selection and move the 2592 // cursor to the right clicked position. 2593 Selection.setSelection((Spannable) mTextView.getText(), offset); 2594 stopTextActionMode(); 2595 } 2596 2597 if (shouldOfferToShowSuggestions()) { 2598 final SuggestionInfo[] suggestionInfoArray = 2599 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2600 for (int i = 0; i < suggestionInfoArray.length; i++) { 2601 suggestionInfoArray[i] = new SuggestionInfo(); 2602 } 2603 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2604 com.android.internal.R.string.replace); 2605 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2606 for (int i = 0; i < numItems; i++) { 2607 final SuggestionInfo info = suggestionInfoArray[i]; 2608 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2609 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2610 @Override 2611 public boolean onMenuItemClick(MenuItem item) { 2612 replaceWithSuggestion(info); 2613 return true; 2614 } 2615 }); 2616 } 2617 } 2618 2619 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2620 com.android.internal.R.string.undo) 2621 .setAlphabeticShortcut('z') 2622 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2623 .setEnabled(mTextView.canUndo()); 2624 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2625 com.android.internal.R.string.redo) 2626 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2627 .setEnabled(mTextView.canRedo()); 2628 2629 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2630 com.android.internal.R.string.cut) 2631 .setAlphabeticShortcut('x') 2632 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2633 .setEnabled(mTextView.canCut()); 2634 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2635 com.android.internal.R.string.copy) 2636 .setAlphabeticShortcut('c') 2637 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2638 .setEnabled(mTextView.canCopy()); 2639 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2640 com.android.internal.R.string.paste) 2641 .setAlphabeticShortcut('v') 2642 .setEnabled(mTextView.canPaste()) 2643 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2644 menu.add(Menu.NONE, TextView.ID_PASTE_AS_PLAIN_TEXT, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2645 com.android.internal.R.string.paste_as_plain_text) 2646 .setEnabled(mTextView.canPasteAsPlainText()) 2647 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2648 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2649 com.android.internal.R.string.share) 2650 .setEnabled(mTextView.canShare()) 2651 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2652 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2653 com.android.internal.R.string.selectAll) 2654 .setAlphabeticShortcut('a') 2655 .setEnabled(mTextView.canSelectAllText()) 2656 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2657 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2658 com.android.internal.R.string.autofill) 2659 .setEnabled(mTextView.canRequestAutofill()) 2660 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2661 2662 mPreserveSelection = true; 2663 } 2664 2665 @Nullable 2666 private SuggestionSpan findEquivalentSuggestionSpan( 2667 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2668 final Editable editable = (Editable) mTextView.getText(); 2669 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2670 // Exactly same span is found. 2671 return suggestionSpanInfo.mSuggestionSpan; 2672 } 2673 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2674 // contents. 2675 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2676 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2677 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2678 final int start = editable.getSpanStart(suggestionSpan); 2679 if (start != suggestionSpanInfo.mSpanStart) { 2680 continue; 2681 } 2682 final int end = editable.getSpanEnd(suggestionSpan); 2683 if (end != suggestionSpanInfo.mSpanEnd) { 2684 continue; 2685 } 2686 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2687 return suggestionSpan; 2688 } 2689 } 2690 return null; 2691 } 2692 2693 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2694 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2695 suggestionInfo.mSuggestionSpanInfo); 2696 if (targetSuggestionSpan == null) { 2697 // Span has been removed 2698 return; 2699 } 2700 final Editable editable = (Editable) mTextView.getText(); 2701 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2702 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2703 if (spanStart < 0 || spanEnd <= spanStart) { 2704 // Span has been removed 2705 return; 2706 } 2707 2708 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2709 // SuggestionSpans are removed by replace: save them before 2710 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2711 SuggestionSpan.class); 2712 final int length = suggestionSpans.length; 2713 int[] suggestionSpansStarts = new int[length]; 2714 int[] suggestionSpansEnds = new int[length]; 2715 int[] suggestionSpansFlags = new int[length]; 2716 for (int i = 0; i < length; i++) { 2717 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2718 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2719 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2720 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2721 2722 // Remove potential misspelled flags 2723 int suggestionSpanFlags = suggestionSpan.getFlags(); 2724 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2725 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2726 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2727 suggestionSpan.setFlags(suggestionSpanFlags); 2728 } 2729 } 2730 2731 // Notify source IME of the suggestion pick. Do this before swapping texts. 2732 targetSuggestionSpan.notifySelection( 2733 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2734 2735 // Swap text content between actual text and Suggestion span 2736 final int suggestionStart = suggestionInfo.mSuggestionStart; 2737 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2738 final String suggestion = suggestionInfo.mText.subSequence( 2739 suggestionStart, suggestionEnd).toString(); 2740 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2741 2742 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2743 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2744 2745 // Restore previous SuggestionSpans 2746 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2747 for (int i = 0; i < length; i++) { 2748 // Only spans that include the modified region make sense after replacement 2749 // Spans partially included in the replaced region are removed, there is no 2750 // way to assign them a valid range after replacement 2751 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2752 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2753 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2754 } 2755 } 2756 // Move cursor at the end of the replaced word 2757 final int newCursorPosition = spanEnd + lengthDelta; 2758 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2759 } 2760 2761 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2762 new MenuItem.OnMenuItemClickListener() { 2763 @Override 2764 public boolean onMenuItemClick(MenuItem item) { 2765 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2766 return true; 2767 } 2768 return mTextView.onTextContextMenuItem(item.getItemId()); 2769 } 2770 }; 2771 2772 /** 2773 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2774 * pop-up should be displayed. 2775 * Also monitors {@link Selection} to call back to the attached input method. 2776 */ 2777 private class SpanController implements SpanWatcher { 2778 2779 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2780 2781 private EasyEditPopupWindow mPopupWindow; 2782 2783 private Runnable mHidePopup; 2784 2785 // This function is pure but inner classes can't have static functions 2786 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2787 final Object span) { 2788 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2789 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2790 } 2791 2792 @Override 2793 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2794 if (isNonIntermediateSelectionSpan(text, span)) { 2795 sendUpdateSelection(); 2796 } else if (span instanceof EasyEditSpan) { 2797 if (mPopupWindow == null) { 2798 mPopupWindow = new EasyEditPopupWindow(); 2799 mHidePopup = new Runnable() { 2800 @Override 2801 public void run() { 2802 hide(); 2803 } 2804 }; 2805 } 2806 2807 // Make sure there is only at most one EasyEditSpan in the text 2808 if (mPopupWindow.mEasyEditSpan != null) { 2809 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2810 } 2811 2812 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2813 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2814 @Override 2815 public void onDeleteClick(EasyEditSpan span) { 2816 Editable editable = (Editable) mTextView.getText(); 2817 int start = editable.getSpanStart(span); 2818 int end = editable.getSpanEnd(span); 2819 if (start >= 0 && end >= 0) { 2820 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2821 mTextView.deleteText_internal(start, end); 2822 } 2823 editable.removeSpan(span); 2824 } 2825 }); 2826 2827 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2828 // The window is not visible yet, ignore the text change. 2829 return; 2830 } 2831 2832 if (mTextView.getLayout() == null) { 2833 // The view has not been laid out yet, ignore the text change 2834 return; 2835 } 2836 2837 if (extractedTextModeWillBeStarted()) { 2838 // The input is in extract mode. Do not handle the easy edit in 2839 // the original TextView, as the ExtractEditText will do 2840 return; 2841 } 2842 2843 mPopupWindow.show(); 2844 mTextView.removeCallbacks(mHidePopup); 2845 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2846 } 2847 } 2848 2849 @Override 2850 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2851 if (isNonIntermediateSelectionSpan(text, span)) { 2852 sendUpdateSelection(); 2853 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2854 hide(); 2855 } 2856 } 2857 2858 @Override 2859 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2860 int newStart, int newEnd) { 2861 if (isNonIntermediateSelectionSpan(text, span)) { 2862 sendUpdateSelection(); 2863 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2864 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2865 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2866 text.removeSpan(easyEditSpan); 2867 } 2868 } 2869 2870 public void hide() { 2871 if (mPopupWindow != null) { 2872 mPopupWindow.hide(); 2873 mTextView.removeCallbacks(mHidePopup); 2874 } 2875 } 2876 2877 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2878 try { 2879 PendingIntent pendingIntent = span.getPendingIntent(); 2880 if (pendingIntent != null) { 2881 Intent intent = new Intent(); 2882 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2883 pendingIntent.send(mTextView.getContext(), 0, intent); 2884 } 2885 } catch (CanceledException e) { 2886 // This should not happen, as we should try to send the intent only once. 2887 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2888 } 2889 } 2890 } 2891 2892 /** 2893 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2894 */ 2895 private interface EasyEditDeleteListener { 2896 2897 /** 2898 * Clicks the delete pop-up. 2899 */ 2900 void onDeleteClick(EasyEditSpan span); 2901 } 2902 2903 /** 2904 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2905 * by {@link SpanController}. 2906 */ 2907 private class EasyEditPopupWindow extends PinnedPopupWindow 2908 implements OnClickListener { 2909 private static final int POPUP_TEXT_LAYOUT = 2910 com.android.internal.R.layout.text_edit_action_popup_text; 2911 private TextView mDeleteTextView; 2912 private EasyEditSpan mEasyEditSpan; 2913 private EasyEditDeleteListener mOnDeleteListener; 2914 2915 @Override 2916 protected void createPopupWindow() { 2917 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2918 com.android.internal.R.attr.textSelectHandleWindowStyle); 2919 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2920 mPopupWindow.setClippingEnabled(true); 2921 } 2922 2923 @Override 2924 protected void initContentView() { 2925 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2926 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2927 mContentView = linearLayout; 2928 mContentView.setBackgroundResource( 2929 com.android.internal.R.drawable.text_edit_side_paste_window); 2930 2931 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 2932 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2933 2934 LayoutParams wrapContent = new LayoutParams( 2935 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2936 2937 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2938 mDeleteTextView.setLayoutParams(wrapContent); 2939 mDeleteTextView.setText(com.android.internal.R.string.delete); 2940 mDeleteTextView.setOnClickListener(this); 2941 mContentView.addView(mDeleteTextView); 2942 } 2943 2944 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2945 mEasyEditSpan = easyEditSpan; 2946 } 2947 2948 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2949 mOnDeleteListener = listener; 2950 } 2951 2952 @Override 2953 public void onClick(View view) { 2954 if (view == mDeleteTextView 2955 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2956 && mOnDeleteListener != null) { 2957 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2958 } 2959 } 2960 2961 @Override 2962 public void hide() { 2963 if (mEasyEditSpan != null) { 2964 mEasyEditSpan.setDeleteEnabled(false); 2965 } 2966 mOnDeleteListener = null; 2967 super.hide(); 2968 } 2969 2970 @Override 2971 protected int getTextOffset() { 2972 // Place the pop-up at the end of the span 2973 Editable editable = (Editable) mTextView.getText(); 2974 return editable.getSpanEnd(mEasyEditSpan); 2975 } 2976 2977 @Override 2978 protected int getVerticalLocalPosition(int line) { 2979 return mTextView.getLayout().getLineBottom(line); 2980 } 2981 2982 @Override 2983 protected int clipVertically(int positionY) { 2984 // As we display the pop-up below the span, no vertical clipping is required. 2985 return positionY; 2986 } 2987 } 2988 2989 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2990 // 3 handles 2991 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2992 // 1 CursorAnchorInfoNotifier 2993 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2994 private TextViewPositionListener[] mPositionListeners = 2995 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2996 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2997 private boolean mPositionHasChanged = true; 2998 // Absolute position of the TextView with respect to its parent window 2999 private int mPositionX, mPositionY; 3000 private int mPositionXOnScreen, mPositionYOnScreen; 3001 private int mNumberOfListeners; 3002 private boolean mScrollHasChanged; 3003 final int[] mTempCoords = new int[2]; 3004 3005 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 3006 if (mNumberOfListeners == 0) { 3007 updatePosition(); 3008 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3009 vto.addOnPreDrawListener(this); 3010 } 3011 3012 int emptySlotIndex = -1; 3013 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3014 TextViewPositionListener listener = mPositionListeners[i]; 3015 if (listener == positionListener) { 3016 return; 3017 } else if (emptySlotIndex < 0 && listener == null) { 3018 emptySlotIndex = i; 3019 } 3020 } 3021 3022 mPositionListeners[emptySlotIndex] = positionListener; 3023 mCanMove[emptySlotIndex] = canMove; 3024 mNumberOfListeners++; 3025 } 3026 3027 public void removeSubscriber(TextViewPositionListener positionListener) { 3028 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3029 if (mPositionListeners[i] == positionListener) { 3030 mPositionListeners[i] = null; 3031 mNumberOfListeners--; 3032 break; 3033 } 3034 } 3035 3036 if (mNumberOfListeners == 0) { 3037 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3038 vto.removeOnPreDrawListener(this); 3039 } 3040 } 3041 3042 public int getPositionX() { 3043 return mPositionX; 3044 } 3045 3046 public int getPositionY() { 3047 return mPositionY; 3048 } 3049 3050 public int getPositionXOnScreen() { 3051 return mPositionXOnScreen; 3052 } 3053 3054 public int getPositionYOnScreen() { 3055 return mPositionYOnScreen; 3056 } 3057 3058 @Override 3059 public boolean onPreDraw() { 3060 updatePosition(); 3061 3062 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3063 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3064 TextViewPositionListener positionListener = mPositionListeners[i]; 3065 if (positionListener != null) { 3066 positionListener.updatePosition(mPositionX, mPositionY, 3067 mPositionHasChanged, mScrollHasChanged); 3068 } 3069 } 3070 } 3071 3072 mScrollHasChanged = false; 3073 return true; 3074 } 3075 3076 private void updatePosition() { 3077 mTextView.getLocationInWindow(mTempCoords); 3078 3079 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3080 3081 mPositionX = mTempCoords[0]; 3082 mPositionY = mTempCoords[1]; 3083 3084 mTextView.getLocationOnScreen(mTempCoords); 3085 3086 mPositionXOnScreen = mTempCoords[0]; 3087 mPositionYOnScreen = mTempCoords[1]; 3088 } 3089 3090 public void onScrollChanged() { 3091 mScrollHasChanged = true; 3092 } 3093 } 3094 3095 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3096 protected PopupWindow mPopupWindow; 3097 protected ViewGroup mContentView; 3098 int mPositionX, mPositionY; 3099 int mClippingLimitLeft, mClippingLimitRight; 3100 3101 protected abstract void createPopupWindow(); 3102 protected abstract void initContentView(); 3103 protected abstract int getTextOffset(); 3104 protected abstract int getVerticalLocalPosition(int line); 3105 protected abstract int clipVertically(int positionY); 3106 protected void setUp() { 3107 } 3108 3109 public PinnedPopupWindow() { 3110 // Due to calling subclass methods in base constructor, subclass constructor is not 3111 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3112 // a chance to initialize subclasses, call setUp() method here. 3113 // TODO: It is good to extract non trivial initialization code from constructor. 3114 setUp(); 3115 3116 createPopupWindow(); 3117 3118 mPopupWindow.setWindowLayoutType( 3119 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3120 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3121 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3122 3123 initContentView(); 3124 3125 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3126 ViewGroup.LayoutParams.WRAP_CONTENT); 3127 mContentView.setLayoutParams(wrapContent); 3128 3129 mPopupWindow.setContentView(mContentView); 3130 } 3131 3132 public void show() { 3133 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3134 3135 computeLocalPosition(); 3136 3137 final PositionListener positionListener = getPositionListener(); 3138 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3139 } 3140 3141 protected void measureContent() { 3142 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3143 mContentView.measure( 3144 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3145 View.MeasureSpec.AT_MOST), 3146 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3147 View.MeasureSpec.AT_MOST)); 3148 } 3149 3150 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3151 * positioned according to viewportToContentHorizontalOffset. 3152 * 3153 * This method assumes that mContentView has properly been measured from its content. */ 3154 private void computeLocalPosition() { 3155 measureContent(); 3156 final int width = mContentView.getMeasuredWidth(); 3157 final int offset = getTextOffset(); 3158 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3159 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3160 3161 final int line = mTextView.getLayout().getLineForOffset(offset); 3162 mPositionY = getVerticalLocalPosition(line); 3163 mPositionY += mTextView.viewportToContentVerticalOffset(); 3164 } 3165 3166 private void updatePosition(int parentPositionX, int parentPositionY) { 3167 int positionX = parentPositionX + mPositionX; 3168 int positionY = parentPositionY + mPositionY; 3169 3170 positionY = clipVertically(positionY); 3171 3172 // Horizontal clipping 3173 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3174 final int width = mContentView.getMeasuredWidth(); 3175 positionX = Math.min( 3176 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3177 positionX = Math.max(-mClippingLimitLeft, positionX); 3178 3179 if (isShowing()) { 3180 mPopupWindow.update(positionX, positionY, -1, -1); 3181 } else { 3182 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3183 positionX, positionY); 3184 } 3185 } 3186 3187 public void hide() { 3188 if (!isShowing()) { 3189 return; 3190 } 3191 mPopupWindow.dismiss(); 3192 getPositionListener().removeSubscriber(this); 3193 } 3194 3195 @Override 3196 public void updatePosition(int parentPositionX, int parentPositionY, 3197 boolean parentPositionChanged, boolean parentScrolled) { 3198 // Either parentPositionChanged or parentScrolled is true, check if still visible 3199 if (isShowing() && isOffsetVisible(getTextOffset())) { 3200 if (parentScrolled) computeLocalPosition(); 3201 updatePosition(parentPositionX, parentPositionY); 3202 } else { 3203 hide(); 3204 } 3205 } 3206 3207 public boolean isShowing() { 3208 return mPopupWindow.isShowing(); 3209 } 3210 } 3211 3212 private static final class SuggestionInfo { 3213 // Range of actual suggestion within mText 3214 int mSuggestionStart, mSuggestionEnd; 3215 3216 // The SuggestionSpan that this TextView represents 3217 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3218 3219 // The index of this suggestion inside suggestionSpan 3220 int mSuggestionIndex; 3221 3222 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3223 3224 void clear() { 3225 mSuggestionSpanInfo.clear(); 3226 mText.clear(); 3227 } 3228 3229 // Utility method to set attributes about a SuggestionSpan. 3230 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3231 mSuggestionSpanInfo.mSuggestionSpan = span; 3232 mSuggestionSpanInfo.mSpanStart = spanStart; 3233 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3234 } 3235 } 3236 3237 private static final class SuggestionSpanInfo { 3238 // The SuggestionSpan; 3239 @Nullable 3240 SuggestionSpan mSuggestionSpan; 3241 3242 // The SuggestionSpan start position 3243 int mSpanStart; 3244 3245 // The SuggestionSpan end position 3246 int mSpanEnd; 3247 3248 void clear() { 3249 mSuggestionSpan = null; 3250 } 3251 } 3252 3253 private class SuggestionHelper { 3254 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3255 new SuggestionSpanComparator(); 3256 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3257 new HashMap<SuggestionSpan, Integer>(); 3258 3259 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3260 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3261 final int flag1 = span1.getFlags(); 3262 final int flag2 = span2.getFlags(); 3263 if (flag1 != flag2) { 3264 // The order here should match what is used in updateDrawState 3265 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3266 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3267 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3268 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3269 if (easy1 && !misspelled1) return -1; 3270 if (easy2 && !misspelled2) return 1; 3271 if (misspelled1) return -1; 3272 if (misspelled2) return 1; 3273 } 3274 3275 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3276 } 3277 } 3278 3279 /** 3280 * Returns the suggestion spans that cover the current cursor position. The suggestion 3281 * spans are sorted according to the length of text that they are attached to. 3282 */ 3283 private SuggestionSpan[] getSortedSuggestionSpans() { 3284 int pos = mTextView.getSelectionStart(); 3285 Spannable spannable = (Spannable) mTextView.getText(); 3286 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3287 3288 mSpansLengths.clear(); 3289 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3290 int start = spannable.getSpanStart(suggestionSpan); 3291 int end = spannable.getSpanEnd(suggestionSpan); 3292 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3293 } 3294 3295 // The suggestions are sorted according to their types (easy correction first, then 3296 // misspelled) and to the length of the text that they cover (shorter first). 3297 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3298 mSpansLengths.clear(); 3299 3300 return suggestionSpans; 3301 } 3302 3303 /** 3304 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3305 * position. 3306 * 3307 * @param suggestionInfos SuggestionInfo array the results will be set. 3308 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3309 * @return the number of suggestions actually fetched. 3310 */ 3311 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3312 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3313 final Spannable spannable = (Spannable) mTextView.getText(); 3314 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3315 final int nbSpans = suggestionSpans.length; 3316 if (nbSpans == 0) return 0; 3317 3318 int numberOfSuggestions = 0; 3319 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3320 final int spanStart = spannable.getSpanStart(suggestionSpan); 3321 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3322 3323 if (misspelledSpanInfo != null 3324 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3325 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3326 misspelledSpanInfo.mSpanStart = spanStart; 3327 misspelledSpanInfo.mSpanEnd = spanEnd; 3328 } 3329 3330 final String[] suggestions = suggestionSpan.getSuggestions(); 3331 final int nbSuggestions = suggestions.length; 3332 suggestionLoop: 3333 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3334 final String suggestion = suggestions[suggestionIndex]; 3335 for (int i = 0; i < numberOfSuggestions; i++) { 3336 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3337 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3338 final int otherSpanStart = 3339 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3340 final int otherSpanEnd = 3341 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3342 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3343 continue suggestionLoop; 3344 } 3345 } 3346 } 3347 3348 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3349 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3350 suggestionInfo.mSuggestionIndex = suggestionIndex; 3351 suggestionInfo.mSuggestionStart = 0; 3352 suggestionInfo.mSuggestionEnd = suggestion.length(); 3353 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3354 numberOfSuggestions++; 3355 if (numberOfSuggestions >= suggestionInfos.length) { 3356 return numberOfSuggestions; 3357 } 3358 } 3359 } 3360 return numberOfSuggestions; 3361 } 3362 } 3363 3364 @VisibleForTesting 3365 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3366 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3367 3368 // Key of intent extras for inserting new word into user dictionary. 3369 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3370 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3371 3372 private SuggestionInfo[] mSuggestionInfos; 3373 private int mNumberOfSuggestions; 3374 private boolean mCursorWasVisibleBeforeSuggestions; 3375 private boolean mIsShowingUp = false; 3376 private SuggestionAdapter mSuggestionsAdapter; 3377 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3378 private TextView mAddToDictionaryButton; 3379 private TextView mDeleteButton; 3380 private ListView mSuggestionListView; 3381 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3382 private int mContainerMarginWidth; 3383 private int mContainerMarginTop; 3384 private LinearLayout mContainerView; 3385 private Context mContext; // TODO: Make mContext final. 3386 3387 private class CustomPopupWindow extends PopupWindow { 3388 3389 @Override 3390 public void dismiss() { 3391 if (!isShowing()) { 3392 return; 3393 } 3394 super.dismiss(); 3395 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3396 3397 // Safe cast since show() checks that mTextView.getText() is an Editable 3398 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3399 3400 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3401 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3402 getInsertionController().show(); 3403 } 3404 } 3405 } 3406 3407 public SuggestionsPopupWindow() { 3408 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3409 } 3410 3411 @Override 3412 protected void setUp() { 3413 mContext = applyDefaultTheme(mTextView.getContext()); 3414 mHighlightSpan = new TextAppearanceSpan(mContext, 3415 mTextView.mTextEditSuggestionHighlightStyle); 3416 } 3417 3418 private Context applyDefaultTheme(Context originalContext) { 3419 TypedArray a = originalContext.obtainStyledAttributes( 3420 new int[]{com.android.internal.R.attr.isLightTheme}); 3421 boolean isLightTheme = a.getBoolean(0, true); 3422 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3423 : R.style.ThemeOverlay_Material_Dark; 3424 a.recycle(); 3425 return new ContextThemeWrapper(originalContext, themeId); 3426 } 3427 3428 @Override 3429 protected void createPopupWindow() { 3430 mPopupWindow = new CustomPopupWindow(); 3431 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3432 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3433 mPopupWindow.setFocusable(true); 3434 mPopupWindow.setClippingEnabled(false); 3435 } 3436 3437 @Override 3438 protected void initContentView() { 3439 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3440 Context.LAYOUT_INFLATER_SERVICE); 3441 mContentView = (ViewGroup) inflater.inflate( 3442 mTextView.mTextEditSuggestionContainerLayout, null); 3443 3444 mContainerView = (LinearLayout) mContentView.findViewById( 3445 com.android.internal.R.id.suggestionWindowContainer); 3446 ViewGroup.MarginLayoutParams lp = 3447 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3448 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3449 mContainerMarginTop = lp.topMargin; 3450 mClippingLimitLeft = lp.leftMargin; 3451 mClippingLimitRight = lp.rightMargin; 3452 3453 mSuggestionListView = (ListView) mContentView.findViewById( 3454 com.android.internal.R.id.suggestionContainer); 3455 3456 mSuggestionsAdapter = new SuggestionAdapter(); 3457 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3458 mSuggestionListView.setOnItemClickListener(this); 3459 3460 // Inflate the suggestion items once and for all. 3461 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3462 for (int i = 0; i < mSuggestionInfos.length; i++) { 3463 mSuggestionInfos[i] = new SuggestionInfo(); 3464 } 3465 3466 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3467 com.android.internal.R.id.addToDictionaryButton); 3468 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3469 public void onClick(View v) { 3470 final SuggestionSpan misspelledSpan = 3471 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3472 if (misspelledSpan == null) { 3473 // Span has been removed. 3474 return; 3475 } 3476 final Editable editable = (Editable) mTextView.getText(); 3477 final int spanStart = editable.getSpanStart(misspelledSpan); 3478 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3479 if (spanStart < 0 || spanEnd <= spanStart) { 3480 return; 3481 } 3482 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3483 3484 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3485 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3486 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3487 mTextView.getTextServicesLocale().toString()); 3488 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3489 mTextView.getContext().startActivity(intent); 3490 // There is no way to know if the word was indeed added. Re-check. 3491 // TODO The ExtractEditText should remove the span in the original text instead 3492 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3493 Selection.setSelection(editable, spanEnd); 3494 updateSpellCheckSpans(spanStart, spanEnd, false); 3495 hideWithCleanUp(); 3496 } 3497 }); 3498 3499 mDeleteButton = (TextView) mContentView.findViewById( 3500 com.android.internal.R.id.deleteButton); 3501 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3502 public void onClick(View v) { 3503 final Editable editable = (Editable) mTextView.getText(); 3504 3505 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3506 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3507 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3508 // Do not leave two adjacent spaces after deletion, or one at beginning of 3509 // text 3510 if (spanUnionEnd < editable.length() 3511 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3512 && (spanUnionStart == 0 3513 || Character.isSpaceChar( 3514 editable.charAt(spanUnionStart - 1)))) { 3515 spanUnionEnd = spanUnionEnd + 1; 3516 } 3517 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3518 } 3519 hideWithCleanUp(); 3520 } 3521 }); 3522 3523 } 3524 3525 public boolean isShowingUp() { 3526 return mIsShowingUp; 3527 } 3528 3529 public void onParentLostFocus() { 3530 mIsShowingUp = false; 3531 } 3532 3533 private class SuggestionAdapter extends BaseAdapter { 3534 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3535 Context.LAYOUT_INFLATER_SERVICE); 3536 3537 @Override 3538 public int getCount() { 3539 return mNumberOfSuggestions; 3540 } 3541 3542 @Override 3543 public Object getItem(int position) { 3544 return mSuggestionInfos[position]; 3545 } 3546 3547 @Override 3548 public long getItemId(int position) { 3549 return position; 3550 } 3551 3552 @Override 3553 public View getView(int position, View convertView, ViewGroup parent) { 3554 TextView textView = (TextView) convertView; 3555 3556 if (textView == null) { 3557 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3558 parent, false); 3559 } 3560 3561 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3562 textView.setText(suggestionInfo.mText); 3563 return textView; 3564 } 3565 } 3566 3567 @VisibleForTesting 3568 public ViewGroup getContentViewForTesting() { 3569 return mContentView; 3570 } 3571 3572 @Override 3573 public void show() { 3574 if (!(mTextView.getText() instanceof Editable)) return; 3575 if (extractedTextModeWillBeStarted()) { 3576 return; 3577 } 3578 3579 if (updateSuggestions()) { 3580 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3581 mTextView.setCursorVisible(false); 3582 mIsShowingUp = true; 3583 super.show(); 3584 } 3585 } 3586 3587 @Override 3588 protected void measureContent() { 3589 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3590 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3591 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3592 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3593 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3594 3595 int width = 0; 3596 View view = null; 3597 for (int i = 0; i < mNumberOfSuggestions; i++) { 3598 view = mSuggestionsAdapter.getView(i, view, mContentView); 3599 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3600 view.measure(horizontalMeasure, verticalMeasure); 3601 width = Math.max(width, view.getMeasuredWidth()); 3602 } 3603 3604 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3605 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3606 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3607 } 3608 3609 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3610 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3611 3612 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3613 + mContainerMarginWidth; 3614 3615 // Enforce the width based on actual text widths 3616 mContentView.measure( 3617 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3618 verticalMeasure); 3619 3620 Drawable popupBackground = mPopupWindow.getBackground(); 3621 if (popupBackground != null) { 3622 if (mTempRect == null) mTempRect = new Rect(); 3623 popupBackground.getPadding(mTempRect); 3624 width += mTempRect.left + mTempRect.right; 3625 } 3626 mPopupWindow.setWidth(width); 3627 } 3628 3629 @Override 3630 protected int getTextOffset() { 3631 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3632 } 3633 3634 @Override 3635 protected int getVerticalLocalPosition(int line) { 3636 return mTextView.getLayout().getLineBottom(line) - mContainerMarginTop; 3637 } 3638 3639 @Override 3640 protected int clipVertically(int positionY) { 3641 final int height = mContentView.getMeasuredHeight(); 3642 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3643 return Math.min(positionY, displayMetrics.heightPixels - height); 3644 } 3645 3646 private void hideWithCleanUp() { 3647 for (final SuggestionInfo info : mSuggestionInfos) { 3648 info.clear(); 3649 } 3650 mMisspelledSpanInfo.clear(); 3651 hide(); 3652 } 3653 3654 private boolean updateSuggestions() { 3655 Spannable spannable = (Spannable) mTextView.getText(); 3656 mNumberOfSuggestions = 3657 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3658 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3659 return false; 3660 } 3661 3662 int spanUnionStart = mTextView.getText().length(); 3663 int spanUnionEnd = 0; 3664 3665 for (int i = 0; i < mNumberOfSuggestions; i++) { 3666 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3667 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3668 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3669 } 3670 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3671 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3672 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3673 } 3674 3675 for (int i = 0; i < mNumberOfSuggestions; i++) { 3676 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3677 } 3678 3679 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3680 int addToDictionaryButtonVisibility = View.GONE; 3681 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3682 if (mMisspelledSpanInfo.mSpanStart >= 0 3683 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3684 addToDictionaryButtonVisibility = View.VISIBLE; 3685 } 3686 } 3687 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3688 3689 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3690 final int underlineColor; 3691 if (mNumberOfSuggestions != 0) { 3692 underlineColor = 3693 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3694 } else { 3695 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3696 } 3697 3698 if (underlineColor == 0) { 3699 // Fallback on the default highlight color when the first span does not provide one 3700 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3701 } else { 3702 final float BACKGROUND_TRANSPARENCY = 0.4f; 3703 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3704 mSuggestionRangeSpan.setBackgroundColor( 3705 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3706 } 3707 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3708 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3709 3710 mSuggestionsAdapter.notifyDataSetChanged(); 3711 return true; 3712 } 3713 3714 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3715 int unionEnd) { 3716 final Spannable text = (Spannable) mTextView.getText(); 3717 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3718 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3719 3720 // Adjust the start/end of the suggestion span 3721 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3722 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3723 + suggestionInfo.mText.length(); 3724 3725 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3726 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3727 3728 // Add the text before and after the span. 3729 final String textAsString = text.toString(); 3730 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3731 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3732 } 3733 3734 @Override 3735 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3736 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3737 replaceWithSuggestion(suggestionInfo); 3738 hideWithCleanUp(); 3739 } 3740 } 3741 3742 /** 3743 * An ActionMode Callback class that is used to provide actions while in text insertion or 3744 * selection mode. 3745 * 3746 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3747 * actions, depending on which of these this TextView supports and the current selection. 3748 */ 3749 private class TextActionModeCallback extends ActionMode.Callback2 { 3750 private final Path mSelectionPath = new Path(); 3751 private final RectF mSelectionBounds = new RectF(); 3752 private final boolean mHasSelection; 3753 private final int mHandleHeight; 3754 3755 public TextActionModeCallback(boolean hasSelection) { 3756 mHasSelection = hasSelection; 3757 if (mHasSelection) { 3758 SelectionModifierCursorController selectionController = getSelectionController(); 3759 if (selectionController.mStartHandle == null) { 3760 // As these are for initializing selectionController, hide() must be called. 3761 selectionController.initDrawables(); 3762 selectionController.initHandles(); 3763 selectionController.hide(); 3764 } 3765 mHandleHeight = Math.max( 3766 mSelectHandleLeft.getMinimumHeight(), 3767 mSelectHandleRight.getMinimumHeight()); 3768 } else { 3769 InsertionPointCursorController insertionController = getInsertionController(); 3770 if (insertionController != null) { 3771 insertionController.getHandle(); 3772 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3773 } else { 3774 mHandleHeight = 0; 3775 } 3776 } 3777 } 3778 3779 @Override 3780 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3781 mode.setTitle(null); 3782 mode.setSubtitle(null); 3783 mode.setTitleOptionalHint(true); 3784 populateMenuWithItems(menu); 3785 3786 Callback customCallback = getCustomCallback(); 3787 if (customCallback != null) { 3788 if (!customCallback.onCreateActionMode(mode, menu)) { 3789 // The custom mode can choose to cancel the action mode, dismiss selection. 3790 Selection.setSelection((Spannable) mTextView.getText(), 3791 mTextView.getSelectionEnd()); 3792 return false; 3793 } 3794 } 3795 3796 if (mTextView.canProcessText()) { 3797 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3798 } 3799 3800 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3801 if (mHasSelection && !mTextView.hasTransientState()) { 3802 mTextView.setHasTransientState(true); 3803 } 3804 return true; 3805 } else { 3806 return false; 3807 } 3808 } 3809 3810 private Callback getCustomCallback() { 3811 return mHasSelection 3812 ? mCustomSelectionActionModeCallback 3813 : mCustomInsertionActionModeCallback; 3814 } 3815 3816 private void populateMenuWithItems(Menu menu) { 3817 if (mTextView.canCut()) { 3818 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3819 com.android.internal.R.string.cut) 3820 .setAlphabeticShortcut('x') 3821 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3822 } 3823 3824 if (mTextView.canCopy()) { 3825 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3826 com.android.internal.R.string.copy) 3827 .setAlphabeticShortcut('c') 3828 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3829 } 3830 3831 if (mTextView.canPaste()) { 3832 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3833 com.android.internal.R.string.paste) 3834 .setAlphabeticShortcut('v') 3835 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3836 } 3837 3838 if (mTextView.canShare()) { 3839 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3840 com.android.internal.R.string.share) 3841 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3842 } 3843 3844 if (mTextView.canRequestAutofill()) { 3845 final int mode = mTextView.getText().length() <= 0 3846 ? MenuItem.SHOW_AS_ACTION_IF_ROOM : MenuItem.SHOW_AS_ACTION_NEVER; 3847 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3848 com.android.internal.R.string.autofill) 3849 .setShowAsAction(mode); 3850 } 3851 3852 if (mTextView.canPasteAsPlainText()) { 3853 menu.add( 3854 Menu.NONE, 3855 TextView.ID_PASTE_AS_PLAIN_TEXT, 3856 MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 3857 com.android.internal.R.string.paste_as_plain_text) 3858 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3859 } 3860 3861 updateSelectAllItem(menu); 3862 updateReplaceItem(menu); 3863 updateAssistMenuItem(menu); 3864 } 3865 3866 @Override 3867 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3868 updateSelectAllItem(menu); 3869 updateReplaceItem(menu); 3870 updateAssistMenuItem(menu); 3871 3872 Callback customCallback = getCustomCallback(); 3873 if (customCallback != null) { 3874 return customCallback.onPrepareActionMode(mode, menu); 3875 } 3876 return true; 3877 } 3878 3879 private void updateSelectAllItem(Menu menu) { 3880 boolean canSelectAll = mTextView.canSelectAllText(); 3881 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3882 if (canSelectAll && !selectAllItemExists) { 3883 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3884 com.android.internal.R.string.selectAll) 3885 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3886 } else if (!canSelectAll && selectAllItemExists) { 3887 menu.removeItem(TextView.ID_SELECT_ALL); 3888 } 3889 } 3890 3891 private void updateReplaceItem(Menu menu) { 3892 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3893 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3894 if (canReplace && !replaceItemExists) { 3895 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3896 com.android.internal.R.string.replace) 3897 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3898 } else if (!canReplace && replaceItemExists) { 3899 menu.removeItem(TextView.ID_REPLACE); 3900 } 3901 } 3902 3903 private void updateAssistMenuItem(Menu menu) { 3904 menu.removeItem(TextView.ID_ASSIST); 3905 final TextClassification textClassification = 3906 getSelectionActionModeHelper().getTextClassification(); 3907 if (textClassification != null) { 3908 final Drawable icon = textClassification.getIcon(); 3909 final CharSequence label = textClassification.getLabel(); 3910 final OnClickListener onClickListener = 3911 textClassification.getOnClickListener(); 3912 final Intent intent = textClassification.getIntent(); 3913 if ((icon != null || !TextUtils.isEmpty(label)) 3914 && (onClickListener != null || intent != null)) { 3915 menu.add(TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, label) 3916 .setIcon(icon) 3917 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3918 mMetricsLogger.write( 3919 new LogMaker(MetricsEvent.TEXT_SELECTION_MENU_ITEM_ASSIST) 3920 .setType(MetricsEvent.TYPE_OPEN) 3921 .setSubtype(textClassification.getLogType())); 3922 } 3923 } 3924 } 3925 3926 @Override 3927 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3928 getSelectionActionModeHelper().onSelectionAction(); 3929 3930 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3931 return true; 3932 } 3933 Callback customCallback = getCustomCallback(); 3934 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3935 return true; 3936 } 3937 final TextClassification textClassification = 3938 getSelectionActionModeHelper().getTextClassification(); 3939 if (TextView.ID_ASSIST == item.getItemId() && textClassification != null) { 3940 final OnClickListener onClickListener = 3941 textClassification.getOnClickListener(); 3942 if (onClickListener != null) { 3943 onClickListener.onClick(mTextView); 3944 } else { 3945 final Intent intent = textClassification.getIntent(); 3946 if (intent != null) { 3947 TextClassification.createStartActivityOnClickListener( 3948 mTextView.getContext(), intent) 3949 .onClick(mTextView); 3950 } 3951 } 3952 mMetricsLogger.action( 3953 MetricsEvent.ACTION_TEXT_SELECTION_MENU_ITEM_ASSIST, 3954 textClassification.getLogType()); 3955 stopTextActionMode(); 3956 return true; 3957 } 3958 return mTextView.onTextContextMenuItem(item.getItemId()); 3959 } 3960 3961 @Override 3962 public void onDestroyActionMode(ActionMode mode) { 3963 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3964 getSelectionActionModeHelper().onDestroyActionMode(); 3965 mTextActionMode = null; 3966 Callback customCallback = getCustomCallback(); 3967 if (customCallback != null) { 3968 customCallback.onDestroyActionMode(mode); 3969 } 3970 3971 if (!mPreserveSelection) { 3972 /* 3973 * Leave current selection when we tentatively destroy action mode for the 3974 * selection. If we're detaching from a window, we'll bring back the selection 3975 * mode when (if) we get reattached. 3976 */ 3977 Selection.setSelection((Spannable) mTextView.getText(), 3978 mTextView.getSelectionEnd()); 3979 } 3980 3981 if (mSelectionModifierCursorController != null) { 3982 mSelectionModifierCursorController.hide(); 3983 } 3984 } 3985 3986 @Override 3987 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3988 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3989 super.onGetContentRect(mode, view, outRect); 3990 return; 3991 } 3992 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3993 // We have a selection. 3994 mSelectionPath.reset(); 3995 mTextView.getLayout().getSelectionPath( 3996 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3997 mSelectionPath.computeBounds(mSelectionBounds, true); 3998 mSelectionBounds.bottom += mHandleHeight; 3999 } else if (mCursorCount == 2) { 4000 // We have a split cursor. In this case, we take the rectangle that includes both 4001 // parts of the cursor to ensure we don't obscure either of them. 4002 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 4003 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 4004 mSelectionBounds.set( 4005 Math.min(firstCursorBounds.left, secondCursorBounds.left), 4006 Math.min(firstCursorBounds.top, secondCursorBounds.top), 4007 Math.max(firstCursorBounds.right, secondCursorBounds.right), 4008 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 4009 + mHandleHeight); 4010 } else { 4011 // We have a single cursor. 4012 Layout layout = mTextView.getLayout(); 4013 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 4014 float primaryHorizontal = clampHorizontalPosition(null, 4015 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 4016 mSelectionBounds.set( 4017 primaryHorizontal, 4018 layout.getLineTop(line), 4019 primaryHorizontal, 4020 layout.getLineTop(line + 1) + mHandleHeight); 4021 } 4022 // Take TextView's padding and scroll into account. 4023 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4024 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4025 outRect.set( 4026 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4027 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4028 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4029 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4030 } 4031 } 4032 4033 /** 4034 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4035 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4036 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4037 */ 4038 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4039 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4040 final int[] mTmpIntOffset = new int[2]; 4041 final Matrix mViewToScreenMatrix = new Matrix(); 4042 4043 @Override 4044 public void updatePosition(int parentPositionX, int parentPositionY, 4045 boolean parentPositionChanged, boolean parentScrolled) { 4046 final InputMethodState ims = mInputMethodState; 4047 if (ims == null || ims.mBatchEditNesting > 0) { 4048 return; 4049 } 4050 final InputMethodManager imm = InputMethodManager.peekInstance(); 4051 if (null == imm) { 4052 return; 4053 } 4054 if (!imm.isActive(mTextView)) { 4055 return; 4056 } 4057 // Skip if the IME has not requested the cursor/anchor position. 4058 if (!imm.isCursorAnchorInfoEnabled()) { 4059 return; 4060 } 4061 Layout layout = mTextView.getLayout(); 4062 if (layout == null) { 4063 return; 4064 } 4065 4066 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4067 builder.reset(); 4068 4069 final int selectionStart = mTextView.getSelectionStart(); 4070 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4071 4072 // Construct transformation matrix from view local coordinates to screen coordinates. 4073 mViewToScreenMatrix.set(mTextView.getMatrix()); 4074 mTextView.getLocationOnScreen(mTmpIntOffset); 4075 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4076 builder.setMatrix(mViewToScreenMatrix); 4077 4078 final float viewportToContentHorizontalOffset = 4079 mTextView.viewportToContentHorizontalOffset(); 4080 final float viewportToContentVerticalOffset = 4081 mTextView.viewportToContentVerticalOffset(); 4082 4083 final CharSequence text = mTextView.getText(); 4084 if (text instanceof Spannable) { 4085 final Spannable sp = (Spannable) text; 4086 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4087 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4088 if (composingTextEnd < composingTextStart) { 4089 final int temp = composingTextEnd; 4090 composingTextEnd = composingTextStart; 4091 composingTextStart = temp; 4092 } 4093 final boolean hasComposingText = 4094 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4095 if (hasComposingText) { 4096 final CharSequence composingText = text.subSequence(composingTextStart, 4097 composingTextEnd); 4098 builder.setComposingText(composingTextStart, composingText); 4099 mTextView.populateCharacterBounds(builder, composingTextStart, 4100 composingTextEnd, viewportToContentHorizontalOffset, 4101 viewportToContentVerticalOffset); 4102 } 4103 } 4104 4105 // Treat selectionStart as the insertion point. 4106 if (0 <= selectionStart) { 4107 final int offset = selectionStart; 4108 final int line = layout.getLineForOffset(offset); 4109 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4110 + viewportToContentHorizontalOffset; 4111 final float insertionMarkerTop = layout.getLineTop(line) 4112 + viewportToContentVerticalOffset; 4113 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4114 + viewportToContentVerticalOffset; 4115 final float insertionMarkerBottom = layout.getLineBottom(line) 4116 + viewportToContentVerticalOffset; 4117 final boolean isTopVisible = mTextView 4118 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4119 final boolean isBottomVisible = mTextView 4120 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4121 int insertionMarkerFlags = 0; 4122 if (isTopVisible || isBottomVisible) { 4123 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4124 } 4125 if (!isTopVisible || !isBottomVisible) { 4126 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4127 } 4128 if (layout.isRtlCharAt(offset)) { 4129 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4130 } 4131 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4132 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4133 } 4134 4135 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4136 } 4137 } 4138 4139 @VisibleForTesting 4140 public abstract class HandleView extends View implements TextViewPositionListener { 4141 protected Drawable mDrawable; 4142 protected Drawable mDrawableLtr; 4143 protected Drawable mDrawableRtl; 4144 private final PopupWindow mContainer; 4145 // Position with respect to the parent TextView 4146 private int mPositionX, mPositionY; 4147 private boolean mIsDragging; 4148 // Offset from touch position to mPosition 4149 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4150 protected int mHotspotX; 4151 protected int mHorizontalGravity; 4152 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4153 private float mTouchOffsetY; 4154 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4155 private float mIdealVerticalOffset; 4156 // Parent's (TextView) previous position in window 4157 private int mLastParentX, mLastParentY; 4158 // Parent's (TextView) previous position on screen 4159 private int mLastParentXOnScreen, mLastParentYOnScreen; 4160 // Previous text character offset 4161 protected int mPreviousOffset = -1; 4162 // Previous text character offset 4163 private boolean mPositionHasChanged = true; 4164 // Minimum touch target size for handles 4165 private int mMinSize; 4166 // Indicates the line of text that the handle is on. 4167 protected int mPrevLine = UNSET_LINE; 4168 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4169 // when selecting text when the handles jump to the end / start of words which may be on 4170 // a different line. 4171 protected int mPreviousLineTouched = UNSET_LINE; 4172 4173 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4174 super(mTextView.getContext()); 4175 setId(id); 4176 mContainer = new PopupWindow(mTextView.getContext(), null, 4177 com.android.internal.R.attr.textSelectHandleWindowStyle); 4178 mContainer.setSplitTouchEnabled(true); 4179 mContainer.setClippingEnabled(false); 4180 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4181 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4182 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4183 mContainer.setContentView(this); 4184 4185 mDrawableLtr = drawableLtr; 4186 mDrawableRtl = drawableRtl; 4187 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4188 com.android.internal.R.dimen.text_handle_min_size); 4189 4190 updateDrawable(); 4191 4192 final int handleHeight = getPreferredHeight(); 4193 mTouchOffsetY = -0.3f * handleHeight; 4194 mIdealVerticalOffset = 0.7f * handleHeight; 4195 } 4196 4197 public float getIdealVerticalOffset() { 4198 return mIdealVerticalOffset; 4199 } 4200 4201 protected void updateDrawable() { 4202 if (mIsDragging) { 4203 // Don't update drawable during dragging. 4204 return; 4205 } 4206 final Layout layout = mTextView.getLayout(); 4207 if (layout == null) { 4208 return; 4209 } 4210 final int offset = getCurrentCursorOffset(); 4211 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4212 final Drawable oldDrawable = mDrawable; 4213 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4214 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4215 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4216 if (oldDrawable != mDrawable && isShowing()) { 4217 // Update popup window position. 4218 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4219 - getHorizontalOffset() + getCursorOffset(); 4220 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4221 mPositionHasChanged = true; 4222 updatePosition(mLastParentX, mLastParentY, false, false); 4223 postInvalidate(); 4224 } 4225 } 4226 4227 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4228 protected abstract int getHorizontalGravity(boolean isRtlRun); 4229 4230 // Touch-up filter: number of previous positions remembered 4231 private static final int HISTORY_SIZE = 5; 4232 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4233 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4234 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4235 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4236 private int mPreviousOffsetIndex = 0; 4237 private int mNumberPreviousOffsets = 0; 4238 4239 private void startTouchUpFilter(int offset) { 4240 mNumberPreviousOffsets = 0; 4241 addPositionToTouchUpFilter(offset); 4242 } 4243 4244 private void addPositionToTouchUpFilter(int offset) { 4245 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4246 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4247 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4248 mNumberPreviousOffsets++; 4249 } 4250 4251 private void filterOnTouchUp() { 4252 final long now = SystemClock.uptimeMillis(); 4253 int i = 0; 4254 int index = mPreviousOffsetIndex; 4255 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4256 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4257 i++; 4258 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4259 } 4260 4261 if (i > 0 && i < iMax 4262 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4263 positionAtCursorOffset(mPreviousOffsets[index], false); 4264 } 4265 } 4266 4267 public boolean offsetHasBeenChanged() { 4268 return mNumberPreviousOffsets > 1; 4269 } 4270 4271 @Override 4272 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4273 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4274 } 4275 4276 @Override 4277 public void invalidate() { 4278 super.invalidate(); 4279 if (isShowing()) { 4280 positionAtCursorOffset(getCurrentCursorOffset(), true); 4281 } 4282 }; 4283 4284 private int getPreferredWidth() { 4285 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4286 } 4287 4288 private int getPreferredHeight() { 4289 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4290 } 4291 4292 public void show() { 4293 if (isShowing()) return; 4294 4295 getPositionListener().addSubscriber(this, true /* local position may change */); 4296 4297 // Make sure the offset is always considered new, even when focusing at same position 4298 mPreviousOffset = -1; 4299 positionAtCursorOffset(getCurrentCursorOffset(), false); 4300 } 4301 4302 protected void dismiss() { 4303 mIsDragging = false; 4304 mContainer.dismiss(); 4305 onDetached(); 4306 } 4307 4308 public void hide() { 4309 dismiss(); 4310 4311 getPositionListener().removeSubscriber(this); 4312 } 4313 4314 public boolean isShowing() { 4315 return mContainer.isShowing(); 4316 } 4317 4318 private boolean isVisible() { 4319 // Always show a dragging handle. 4320 if (mIsDragging) { 4321 return true; 4322 } 4323 4324 if (mTextView.isInBatchEditMode()) { 4325 return false; 4326 } 4327 4328 return mTextView.isPositionVisible( 4329 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4330 } 4331 4332 public abstract int getCurrentCursorOffset(); 4333 4334 protected abstract void updateSelection(int offset); 4335 4336 public abstract void updatePosition(float x, float y); 4337 4338 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4339 return layout.isRtlCharAt(offset); 4340 } 4341 4342 @VisibleForTesting 4343 public float getHorizontal(@NonNull Layout layout, int offset) { 4344 return layout.getPrimaryHorizontal(offset); 4345 } 4346 4347 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4348 return mTextView.getOffsetAtCoordinate(line, x); 4349 } 4350 4351 /** 4352 * @param offset Cursor offset. Must be in [-1, length]. 4353 * @param forceUpdatePosition whether to force update the position. This should be true 4354 * when If the parent has been scrolled, for example. 4355 */ 4356 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4357 // A HandleView relies on the layout, which may be nulled by external methods 4358 Layout layout = mTextView.getLayout(); 4359 if (layout == null) { 4360 // Will update controllers' state, hiding them and stopping selection mode if needed 4361 prepareCursorControllers(); 4362 return; 4363 } 4364 layout = mTextView.getLayout(); 4365 4366 boolean offsetChanged = offset != mPreviousOffset; 4367 if (offsetChanged || forceUpdatePosition) { 4368 if (offsetChanged) { 4369 updateSelection(offset); 4370 addPositionToTouchUpFilter(offset); 4371 } 4372 final int line = layout.getLineForOffset(offset); 4373 mPrevLine = line; 4374 4375 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4376 - getHorizontalOffset() + getCursorOffset(); 4377 mPositionY = layout.getLineBottom(line); 4378 4379 // Take TextView's padding and scroll into account. 4380 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4381 mPositionY += mTextView.viewportToContentVerticalOffset(); 4382 4383 mPreviousOffset = offset; 4384 mPositionHasChanged = true; 4385 } 4386 } 4387 4388 /** 4389 * Return the clamped horizontal position for the first cursor. 4390 * 4391 * @param layout Text layout. 4392 * @param offset Character offset for the cursor. 4393 * @return The clamped horizontal position for the cursor. 4394 */ 4395 int getCursorHorizontalPosition(Layout layout, int offset) { 4396 return (int) (getHorizontal(layout, offset) - 0.5f); 4397 } 4398 4399 @Override 4400 public void updatePosition(int parentPositionX, int parentPositionY, 4401 boolean parentPositionChanged, boolean parentScrolled) { 4402 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 4403 if (parentPositionChanged || mPositionHasChanged) { 4404 if (mIsDragging) { 4405 // Update touchToWindow offset in case of parent scrolling while dragging 4406 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4407 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4408 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4409 mLastParentX = parentPositionX; 4410 mLastParentY = parentPositionY; 4411 } 4412 4413 onHandleMoved(); 4414 } 4415 4416 if (isVisible()) { 4417 // Transform to the window coordinates to follow the view tranformation. 4418 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4419 mTextView.transformFromViewToWindowSpace(pts); 4420 pts[0] -= mHotspotX + getHorizontalOffset(); 4421 4422 if (isShowing()) { 4423 mContainer.update(pts[0], pts[1], -1, -1); 4424 } else { 4425 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4426 } 4427 } else { 4428 if (isShowing()) { 4429 dismiss(); 4430 } 4431 } 4432 4433 mPositionHasChanged = false; 4434 } 4435 } 4436 4437 @Override 4438 protected void onDraw(Canvas c) { 4439 final int drawWidth = mDrawable.getIntrinsicWidth(); 4440 final int left = getHorizontalOffset(); 4441 4442 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4443 mDrawable.draw(c); 4444 } 4445 4446 private int getHorizontalOffset() { 4447 final int width = getPreferredWidth(); 4448 final int drawWidth = mDrawable.getIntrinsicWidth(); 4449 final int left; 4450 switch (mHorizontalGravity) { 4451 case Gravity.LEFT: 4452 left = 0; 4453 break; 4454 default: 4455 case Gravity.CENTER: 4456 left = (width - drawWidth) / 2; 4457 break; 4458 case Gravity.RIGHT: 4459 left = width - drawWidth; 4460 break; 4461 } 4462 return left; 4463 } 4464 4465 protected int getCursorOffset() { 4466 return 0; 4467 } 4468 4469 @Override 4470 public boolean onTouchEvent(MotionEvent ev) { 4471 updateFloatingToolbarVisibility(ev); 4472 4473 switch (ev.getActionMasked()) { 4474 case MotionEvent.ACTION_DOWN: { 4475 startTouchUpFilter(getCurrentCursorOffset()); 4476 4477 final PositionListener positionListener = getPositionListener(); 4478 mLastParentX = positionListener.getPositionX(); 4479 mLastParentY = positionListener.getPositionY(); 4480 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4481 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4482 4483 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4484 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4485 mTouchToWindowOffsetX = xInWindow - mPositionX; 4486 mTouchToWindowOffsetY = yInWindow - mPositionY; 4487 4488 mIsDragging = true; 4489 mPreviousLineTouched = UNSET_LINE; 4490 break; 4491 } 4492 4493 case MotionEvent.ACTION_MOVE: { 4494 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4495 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4496 4497 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4498 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4499 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4500 float newVerticalOffset; 4501 if (previousVerticalOffset < mIdealVerticalOffset) { 4502 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4503 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4504 } else { 4505 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4506 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4507 } 4508 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4509 4510 final float newPosX = 4511 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4512 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4513 4514 updatePosition(newPosX, newPosY); 4515 break; 4516 } 4517 4518 case MotionEvent.ACTION_UP: 4519 filterOnTouchUp(); 4520 mIsDragging = false; 4521 updateDrawable(); 4522 break; 4523 4524 case MotionEvent.ACTION_CANCEL: 4525 mIsDragging = false; 4526 updateDrawable(); 4527 break; 4528 } 4529 return true; 4530 } 4531 4532 public boolean isDragging() { 4533 return mIsDragging; 4534 } 4535 4536 void onHandleMoved() {} 4537 4538 public void onDetached() {} 4539 } 4540 4541 private class InsertionHandleView extends HandleView { 4542 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4543 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4544 4545 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4546 private float mDownPositionX, mDownPositionY; 4547 private Runnable mHider; 4548 4549 public InsertionHandleView(Drawable drawable) { 4550 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4551 } 4552 4553 @Override 4554 public void show() { 4555 super.show(); 4556 4557 final long durationSinceCutOrCopy = 4558 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4559 4560 // Cancel the single tap delayed runnable. 4561 if (mInsertionActionModeRunnable != null 4562 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4563 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4564 || isCursorInsideEasyCorrectionSpan())) { 4565 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4566 } 4567 4568 // Prepare and schedule the single tap runnable to run exactly after the double tap 4569 // timeout has passed. 4570 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4571 && !isCursorInsideEasyCorrectionSpan() 4572 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4573 if (mTextActionMode == null) { 4574 if (mInsertionActionModeRunnable == null) { 4575 mInsertionActionModeRunnable = new Runnable() { 4576 @Override 4577 public void run() { 4578 startInsertionActionMode(); 4579 } 4580 }; 4581 } 4582 mTextView.postDelayed( 4583 mInsertionActionModeRunnable, 4584 ViewConfiguration.getDoubleTapTimeout() + 1); 4585 } 4586 4587 } 4588 4589 hideAfterDelay(); 4590 } 4591 4592 private void hideAfterDelay() { 4593 if (mHider == null) { 4594 mHider = new Runnable() { 4595 public void run() { 4596 hide(); 4597 } 4598 }; 4599 } else { 4600 removeHiderCallback(); 4601 } 4602 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4603 } 4604 4605 private void removeHiderCallback() { 4606 if (mHider != null) { 4607 mTextView.removeCallbacks(mHider); 4608 } 4609 } 4610 4611 @Override 4612 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4613 return drawable.getIntrinsicWidth() / 2; 4614 } 4615 4616 @Override 4617 protected int getHorizontalGravity(boolean isRtlRun) { 4618 return Gravity.CENTER_HORIZONTAL; 4619 } 4620 4621 @Override 4622 protected int getCursorOffset() { 4623 int offset = super.getCursorOffset(); 4624 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4625 if (cursor != null) { 4626 cursor.getPadding(mTempRect); 4627 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4628 } 4629 return offset; 4630 } 4631 4632 @Override 4633 int getCursorHorizontalPosition(Layout layout, int offset) { 4634 final Drawable drawable = mCursorCount > 0 ? mCursorDrawable[0] : null; 4635 if (drawable != null) { 4636 final float horizontal = getHorizontal(layout, offset); 4637 return clampHorizontalPosition(drawable, horizontal) + mTempRect.left; 4638 } 4639 return super.getCursorHorizontalPosition(layout, offset); 4640 } 4641 4642 @Override 4643 public boolean onTouchEvent(MotionEvent ev) { 4644 final boolean result = super.onTouchEvent(ev); 4645 4646 switch (ev.getActionMasked()) { 4647 case MotionEvent.ACTION_DOWN: 4648 mDownPositionX = ev.getRawX(); 4649 mDownPositionY = ev.getRawY(); 4650 break; 4651 4652 case MotionEvent.ACTION_UP: 4653 if (!offsetHasBeenChanged()) { 4654 final float deltaX = mDownPositionX - ev.getRawX(); 4655 final float deltaY = mDownPositionY - ev.getRawY(); 4656 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4657 4658 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4659 mTextView.getContext()); 4660 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4661 4662 if (distanceSquared < touchSlop * touchSlop) { 4663 // Tapping on the handle toggles the insertion action mode. 4664 if (mTextActionMode != null) { 4665 stopTextActionMode(); 4666 } else { 4667 startInsertionActionMode(); 4668 } 4669 } 4670 } else { 4671 if (mTextActionMode != null) { 4672 mTextActionMode.invalidateContentRect(); 4673 } 4674 } 4675 hideAfterDelay(); 4676 break; 4677 4678 case MotionEvent.ACTION_CANCEL: 4679 hideAfterDelay(); 4680 break; 4681 4682 default: 4683 break; 4684 } 4685 4686 return result; 4687 } 4688 4689 @Override 4690 public int getCurrentCursorOffset() { 4691 return mTextView.getSelectionStart(); 4692 } 4693 4694 @Override 4695 public void updateSelection(int offset) { 4696 Selection.setSelection((Spannable) mTextView.getText(), offset); 4697 } 4698 4699 @Override 4700 public void updatePosition(float x, float y) { 4701 Layout layout = mTextView.getLayout(); 4702 int offset; 4703 if (layout != null) { 4704 if (mPreviousLineTouched == UNSET_LINE) { 4705 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4706 } 4707 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4708 offset = getOffsetAtCoordinate(layout, currLine, x); 4709 mPreviousLineTouched = currLine; 4710 } else { 4711 offset = -1; 4712 } 4713 positionAtCursorOffset(offset, false); 4714 if (mTextActionMode != null) { 4715 invalidateActionMode(); 4716 } 4717 } 4718 4719 @Override 4720 void onHandleMoved() { 4721 super.onHandleMoved(); 4722 removeHiderCallback(); 4723 } 4724 4725 @Override 4726 public void onDetached() { 4727 super.onDetached(); 4728 removeHiderCallback(); 4729 } 4730 } 4731 4732 @Retention(RetentionPolicy.SOURCE) 4733 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4734 public @interface HandleType {} 4735 public static final int HANDLE_TYPE_SELECTION_START = 0; 4736 public static final int HANDLE_TYPE_SELECTION_END = 1; 4737 4738 private class SelectionHandleView extends HandleView { 4739 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4740 // end (HANDLE_TYPE_SELECTION_END). 4741 @HandleType 4742 private final int mHandleType; 4743 // Indicates whether the cursor is making adjustments within a word. 4744 private boolean mInWord = false; 4745 // Difference between touch position and word boundary position. 4746 private float mTouchWordDelta; 4747 // X value of the previous updatePosition call. 4748 private float mPrevX; 4749 // Indicates if the handle has moved a boundary between LTR and RTL text. 4750 private boolean mLanguageDirectionChanged = false; 4751 // Distance from edge of horizontally scrolling text view 4752 // to use to switch to character mode. 4753 private final float mTextViewEdgeSlop; 4754 // Used to save text view location. 4755 private final int[] mTextViewLocation = new int[2]; 4756 4757 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4758 @HandleType int handleType) { 4759 super(drawableLtr, drawableRtl, id); 4760 mHandleType = handleType; 4761 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4762 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4763 } 4764 4765 private boolean isStartHandle() { 4766 return mHandleType == HANDLE_TYPE_SELECTION_START; 4767 } 4768 4769 @Override 4770 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4771 if (isRtlRun == isStartHandle()) { 4772 return drawable.getIntrinsicWidth() / 4; 4773 } else { 4774 return (drawable.getIntrinsicWidth() * 3) / 4; 4775 } 4776 } 4777 4778 @Override 4779 protected int getHorizontalGravity(boolean isRtlRun) { 4780 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4781 } 4782 4783 @Override 4784 public int getCurrentCursorOffset() { 4785 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4786 } 4787 4788 @Override 4789 protected void updateSelection(int offset) { 4790 if (isStartHandle()) { 4791 Selection.setSelection((Spannable) mTextView.getText(), offset, 4792 mTextView.getSelectionEnd()); 4793 } else { 4794 Selection.setSelection((Spannable) mTextView.getText(), 4795 mTextView.getSelectionStart(), offset); 4796 } 4797 updateDrawable(); 4798 if (mTextActionMode != null) { 4799 invalidateActionMode(); 4800 } 4801 } 4802 4803 @Override 4804 public void updatePosition(float x, float y) { 4805 final Layout layout = mTextView.getLayout(); 4806 if (layout == null) { 4807 // HandleView will deal appropriately in positionAtCursorOffset when 4808 // layout is null. 4809 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y)); 4810 return; 4811 } 4812 4813 if (mPreviousLineTouched == UNSET_LINE) { 4814 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4815 } 4816 4817 boolean positionCursor = false; 4818 final int anotherHandleOffset = 4819 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4820 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4821 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4822 4823 if (isStartHandle() && initialOffset >= anotherHandleOffset 4824 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4825 // Handles have crossed, bound it to the first selected line and 4826 // adjust by word / char as normal. 4827 currLine = layout.getLineForOffset(anotherHandleOffset); 4828 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4829 } 4830 4831 int offset = initialOffset; 4832 final int wordEnd = getWordEnd(offset); 4833 final int wordStart = getWordStart(offset); 4834 4835 if (mPrevX == UNSET_X_VALUE) { 4836 mPrevX = x; 4837 } 4838 4839 final int currentOffset = getCurrentCursorOffset(); 4840 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4841 final boolean atRtl = isAtRtlRun(layout, offset); 4842 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4843 4844 // We can't determine if the user is expanding or shrinking the selection if they're 4845 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4846 // the cursor at the current position. 4847 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4848 // We're on a boundary or this is the first direction change -- just update 4849 // to the current position. 4850 mLanguageDirectionChanged = true; 4851 mTouchWordDelta = 0.0f; 4852 positionAndAdjustForCrossingHandles(offset); 4853 return; 4854 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4855 // We've just moved past the boundary so update the position. After this we can 4856 // figure out if the user is expanding or shrinking to go by word or character. 4857 positionAndAdjustForCrossingHandles(offset); 4858 mTouchWordDelta = 0.0f; 4859 mLanguageDirectionChanged = false; 4860 return; 4861 } 4862 4863 boolean isExpanding; 4864 final float xDiff = x - mPrevX; 4865 if (isStartHandle()) { 4866 isExpanding = currLine < mPreviousLineTouched; 4867 } else { 4868 isExpanding = currLine > mPreviousLineTouched; 4869 } 4870 if (atRtl == isStartHandle()) { 4871 isExpanding |= xDiff > 0; 4872 } else { 4873 isExpanding |= xDiff < 0; 4874 } 4875 4876 if (mTextView.getHorizontallyScrolling()) { 4877 if (positionNearEdgeOfScrollingView(x, atRtl) 4878 && ((isStartHandle() && mTextView.getScrollX() != 0) 4879 || (!isStartHandle() 4880 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4881 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4882 || (!isStartHandle() && offset > currentOffset))) 4883 || !isExpanding)) { 4884 // If we're expanding ensure that the offset is actually expanding compared to 4885 // the current offset, if the handle snapped to the word, the finger position 4886 // may be out of sync and we don't want the selection to jump back. 4887 mTouchWordDelta = 0.0f; 4888 final int nextOffset = (atRtl == isStartHandle()) 4889 ? layout.getOffsetToRightOf(mPreviousOffset) 4890 : layout.getOffsetToLeftOf(mPreviousOffset); 4891 positionAndAdjustForCrossingHandles(nextOffset); 4892 return; 4893 } 4894 } 4895 4896 if (isExpanding) { 4897 // User is increasing the selection. 4898 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4899 final boolean snapToWord = (!mInWord 4900 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4901 && atRtl == isAtRtlRun(layout, wordBoundary); 4902 if (snapToWord) { 4903 // Sometimes words can be broken across lines (Chinese, hyphenation). 4904 // We still snap to the word boundary but we only use the letters on the 4905 // current line to determine if the user is far enough into the word to snap. 4906 if (layout.getLineForOffset(wordBoundary) != currLine) { 4907 wordBoundary = isStartHandle() 4908 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4909 } 4910 final int offsetThresholdToSnap = isStartHandle() 4911 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4912 : wordStart + ((wordBoundary - wordStart) / 2); 4913 if (isStartHandle() 4914 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4915 // User is far enough into the word or on a different line so we expand by 4916 // word. 4917 offset = wordStart; 4918 } else if (!isStartHandle() 4919 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4920 // User is far enough into the word or on a different line so we expand by 4921 // word. 4922 offset = wordEnd; 4923 } else { 4924 offset = mPreviousOffset; 4925 } 4926 } 4927 if ((isStartHandle() && offset < initialOffset) 4928 || (!isStartHandle() && offset > initialOffset)) { 4929 final float adjustedX = getHorizontal(layout, offset); 4930 mTouchWordDelta = 4931 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4932 } else { 4933 mTouchWordDelta = 0.0f; 4934 } 4935 positionCursor = true; 4936 } else { 4937 final int adjustedOffset = 4938 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4939 final boolean shrinking = isStartHandle() 4940 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4941 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4942 if (shrinking) { 4943 // User is shrinking the selection. 4944 if (currLine != mPrevLine) { 4945 // We're on a different line, so we'll snap to word boundaries. 4946 offset = isStartHandle() ? wordStart : wordEnd; 4947 if ((isStartHandle() && offset < initialOffset) 4948 || (!isStartHandle() && offset > initialOffset)) { 4949 final float adjustedX = getHorizontal(layout, offset); 4950 mTouchWordDelta = 4951 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4952 } else { 4953 mTouchWordDelta = 0.0f; 4954 } 4955 } else { 4956 offset = adjustedOffset; 4957 } 4958 positionCursor = true; 4959 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4960 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4961 // Handle has jumped to the word boundary, and the user is moving 4962 // their finger towards the handle, the delta should be updated. 4963 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4964 - getHorizontal(layout, mPreviousOffset); 4965 } 4966 } 4967 4968 if (positionCursor) { 4969 mPreviousLineTouched = currLine; 4970 positionAndAdjustForCrossingHandles(offset); 4971 } 4972 mPrevX = x; 4973 } 4974 4975 @Override 4976 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4977 super.positionAtCursorOffset(offset, forceUpdatePosition); 4978 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 4979 } 4980 4981 @Override 4982 public boolean onTouchEvent(MotionEvent event) { 4983 boolean superResult = super.onTouchEvent(event); 4984 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 4985 // Reset the touch word offset and x value when the user 4986 // re-engages the handle. 4987 mTouchWordDelta = 0.0f; 4988 mPrevX = UNSET_X_VALUE; 4989 } 4990 return superResult; 4991 } 4992 4993 private void positionAndAdjustForCrossingHandles(int offset) { 4994 final int anotherHandleOffset = 4995 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4996 if ((isStartHandle() && offset >= anotherHandleOffset) 4997 || (!isStartHandle() && offset <= anotherHandleOffset)) { 4998 mTouchWordDelta = 0.0f; 4999 final Layout layout = mTextView.getLayout(); 5000 if (layout != null && offset != anotherHandleOffset) { 5001 final float horiz = getHorizontal(layout, offset); 5002 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 5003 !isStartHandle()); 5004 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 5005 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 5006 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 5007 // This handle passes another one as it crossed a direction boundary. 5008 // Don't minimize the selection, but keep the handle at the run boundary. 5009 final int currentOffset = getCurrentCursorOffset(); 5010 final int offsetToGetRunRange = isStartHandle() 5011 ? currentOffset : Math.max(currentOffset - 1, 0); 5012 final long range = layout.getRunRange(offsetToGetRunRange); 5013 if (isStartHandle()) { 5014 offset = TextUtils.unpackRangeStartFromLong(range); 5015 } else { 5016 offset = TextUtils.unpackRangeEndFromLong(range); 5017 } 5018 positionAtCursorOffset(offset, false); 5019 return; 5020 } 5021 } 5022 // Handles can not cross and selection is at least one character. 5023 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5024 } 5025 positionAtCursorOffset(offset, false); 5026 } 5027 5028 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5029 mTextView.getLocationOnScreen(mTextViewLocation); 5030 boolean nearEdge; 5031 if (atRtl == isStartHandle()) { 5032 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5033 - mTextView.getPaddingRight(); 5034 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5035 } else { 5036 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5037 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5038 } 5039 return nearEdge; 5040 } 5041 5042 @Override 5043 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5044 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5045 return layout.isRtlCharAt(offsetToCheck); 5046 } 5047 5048 @Override 5049 public float getHorizontal(@NonNull Layout layout, int offset) { 5050 return getHorizontal(layout, offset, isStartHandle()); 5051 } 5052 5053 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5054 final int line = layout.getLineForOffset(offset); 5055 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5056 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5057 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5058 return (isRtlChar == isRtlParagraph) 5059 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5060 } 5061 5062 @Override 5063 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5064 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5065 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5066 if (!layout.isLevelBoundary(primaryOffset)) { 5067 return primaryOffset; 5068 } 5069 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5070 final int currentOffset = getCurrentCursorOffset(); 5071 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5072 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5073 if (primaryDiff < secondaryDiff) { 5074 return primaryOffset; 5075 } else if (primaryDiff > secondaryDiff) { 5076 return secondaryOffset; 5077 } else { 5078 final int offsetToCheck = isStartHandle() 5079 ? currentOffset : Math.max(currentOffset - 1, 0); 5080 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5081 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5082 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5083 } 5084 } 5085 } 5086 5087 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5088 final int trueLine = mTextView.getLineAtCoordinate(y); 5089 if (layout == null || prevLine > layout.getLineCount() 5090 || layout.getLineCount() <= 0 || prevLine < 0) { 5091 // Invalid parameters, just return whatever line is at y. 5092 return trueLine; 5093 } 5094 5095 if (Math.abs(trueLine - prevLine) >= 2) { 5096 // Only stick to lines if we're within a line of the previous selection. 5097 return trueLine; 5098 } 5099 5100 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5101 final int lineCount = layout.getLineCount(); 5102 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5103 5104 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5105 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5106 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5107 5108 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5109 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5110 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5111 5112 // Determine if we've moved lines based on y position and previous line. 5113 int currLine; 5114 if (y <= yTopBound) { 5115 currLine = Math.max(prevLine - 1, 0); 5116 } else if (y >= yBottomBound) { 5117 currLine = Math.min(prevLine + 1, lineCount - 1); 5118 } else { 5119 currLine = prevLine; 5120 } 5121 return currLine; 5122 } 5123 5124 /** 5125 * A CursorController instance can be used to control a cursor in the text. 5126 */ 5127 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5128 /** 5129 * Makes the cursor controller visible on screen. 5130 * See also {@link #hide()}. 5131 */ 5132 public void show(); 5133 5134 /** 5135 * Hide the cursor controller from screen. 5136 * See also {@link #show()}. 5137 */ 5138 public void hide(); 5139 5140 /** 5141 * Called when the view is detached from window. Perform house keeping task, such as 5142 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5143 * preventing the activity from being recycled. 5144 */ 5145 public void onDetached(); 5146 5147 public boolean isCursorBeingModified(); 5148 5149 public boolean isActive(); 5150 } 5151 5152 private class InsertionPointCursorController implements CursorController { 5153 private InsertionHandleView mHandle; 5154 5155 public void show() { 5156 getHandle().show(); 5157 5158 if (mSelectionModifierCursorController != null) { 5159 mSelectionModifierCursorController.hide(); 5160 } 5161 } 5162 5163 public void hide() { 5164 if (mHandle != null) { 5165 mHandle.hide(); 5166 } 5167 } 5168 5169 public void onTouchModeChanged(boolean isInTouchMode) { 5170 if (!isInTouchMode) { 5171 hide(); 5172 } 5173 } 5174 5175 private InsertionHandleView getHandle() { 5176 if (mSelectHandleCenter == null) { 5177 mSelectHandleCenter = mTextView.getContext().getDrawable( 5178 mTextView.mTextSelectHandleRes); 5179 } 5180 if (mHandle == null) { 5181 mHandle = new InsertionHandleView(mSelectHandleCenter); 5182 } 5183 return mHandle; 5184 } 5185 5186 @Override 5187 public void onDetached() { 5188 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5189 observer.removeOnTouchModeChangeListener(this); 5190 5191 if (mHandle != null) mHandle.onDetached(); 5192 } 5193 5194 @Override 5195 public boolean isCursorBeingModified() { 5196 return mHandle != null && mHandle.isDragging(); 5197 } 5198 5199 @Override 5200 public boolean isActive() { 5201 return mHandle != null && mHandle.isShowing(); 5202 } 5203 5204 public void invalidateHandle() { 5205 if (mHandle != null) { 5206 mHandle.invalidate(); 5207 } 5208 } 5209 } 5210 5211 class SelectionModifierCursorController implements CursorController { 5212 // The cursor controller handles, lazily created when shown. 5213 private SelectionHandleView mStartHandle; 5214 private SelectionHandleView mEndHandle; 5215 // The offsets of that last touch down event. Remembered to start selection there. 5216 private int mMinTouchOffset, mMaxTouchOffset; 5217 5218 private float mDownPositionX, mDownPositionY; 5219 private boolean mGestureStayedInTapRegion; 5220 5221 // Where the user first starts the drag motion. 5222 private int mStartOffset = -1; 5223 5224 private boolean mHaventMovedEnoughToStartDrag; 5225 // The line that a selection happened most recently with the drag accelerator. 5226 private int mLineSelectionIsOn = -1; 5227 // Whether the drag accelerator has selected past the initial line. 5228 private boolean mSwitchedLines = false; 5229 5230 // Indicates the drag accelerator mode that the user is currently using. 5231 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5232 // Drag accelerator is inactive. 5233 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5234 // Character based selection by dragging. Only for mouse. 5235 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5236 // Word based selection by dragging. Enabled after long pressing or double tapping. 5237 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5238 // Paragraph based selection by dragging. Enabled after mouse triple click. 5239 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5240 5241 SelectionModifierCursorController() { 5242 resetTouchOffsets(); 5243 } 5244 5245 public void show() { 5246 if (mTextView.isInBatchEditMode()) { 5247 return; 5248 } 5249 initDrawables(); 5250 initHandles(); 5251 } 5252 5253 private void initDrawables() { 5254 if (mSelectHandleLeft == null) { 5255 mSelectHandleLeft = mTextView.getContext().getDrawable( 5256 mTextView.mTextSelectHandleLeftRes); 5257 } 5258 if (mSelectHandleRight == null) { 5259 mSelectHandleRight = mTextView.getContext().getDrawable( 5260 mTextView.mTextSelectHandleRightRes); 5261 } 5262 } 5263 5264 private void initHandles() { 5265 // Lazy object creation has to be done before updatePosition() is called. 5266 if (mStartHandle == null) { 5267 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5268 com.android.internal.R.id.selection_start_handle, 5269 HANDLE_TYPE_SELECTION_START); 5270 } 5271 if (mEndHandle == null) { 5272 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5273 com.android.internal.R.id.selection_end_handle, 5274 HANDLE_TYPE_SELECTION_END); 5275 } 5276 5277 mStartHandle.show(); 5278 mEndHandle.show(); 5279 5280 hideInsertionPointCursorController(); 5281 } 5282 5283 public void hide() { 5284 if (mStartHandle != null) mStartHandle.hide(); 5285 if (mEndHandle != null) mEndHandle.hide(); 5286 } 5287 5288 public void enterDrag(int dragAcceleratorMode) { 5289 // Just need to init the handles / hide insertion cursor. 5290 show(); 5291 mDragAcceleratorMode = dragAcceleratorMode; 5292 // Start location of selection. 5293 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5294 mLastDownPositionY); 5295 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5296 // Don't show the handles until user has lifted finger. 5297 hide(); 5298 5299 // This stops scrolling parents from intercepting the touch event, allowing 5300 // the user to continue dragging across the screen to select text; TextView will 5301 // scroll as necessary. 5302 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5303 mTextView.cancelLongPress(); 5304 } 5305 5306 public void onTouchEvent(MotionEvent event) { 5307 // This is done even when the View does not have focus, so that long presses can start 5308 // selection and tap can move cursor from this tap position. 5309 final float eventX = event.getX(); 5310 final float eventY = event.getY(); 5311 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5312 switch (event.getActionMasked()) { 5313 case MotionEvent.ACTION_DOWN: 5314 if (extractedTextModeWillBeStarted()) { 5315 // Prevent duplicating the selection handles until the mode starts. 5316 hide(); 5317 } else { 5318 // Remember finger down position, to be able to start selection from there. 5319 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5320 eventX, eventY); 5321 5322 // Double tap detection 5323 if (mGestureStayedInTapRegion) { 5324 if (mTapState == TAP_STATE_DOUBLE_TAP 5325 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5326 final float deltaX = eventX - mDownPositionX; 5327 final float deltaY = eventY - mDownPositionY; 5328 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5329 5330 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5331 mTextView.getContext()); 5332 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5333 boolean stayedInArea = 5334 distanceSquared < doubleTapSlop * doubleTapSlop; 5335 5336 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5337 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5338 selectCurrentWordAndStartDrag(); 5339 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5340 selectCurrentParagraphAndStartDrag(); 5341 } 5342 mDiscardNextActionUp = true; 5343 } 5344 } 5345 } 5346 5347 mDownPositionX = eventX; 5348 mDownPositionY = eventY; 5349 mGestureStayedInTapRegion = true; 5350 mHaventMovedEnoughToStartDrag = true; 5351 } 5352 break; 5353 5354 case MotionEvent.ACTION_POINTER_DOWN: 5355 case MotionEvent.ACTION_POINTER_UP: 5356 // Handle multi-point gestures. Keep min and max offset positions. 5357 // Only activated for devices that correctly handle multi-touch. 5358 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5359 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5360 updateMinAndMaxOffsets(event); 5361 } 5362 break; 5363 5364 case MotionEvent.ACTION_MOVE: 5365 final ViewConfiguration viewConfig = ViewConfiguration.get( 5366 mTextView.getContext()); 5367 final int touchSlop = viewConfig.getScaledTouchSlop(); 5368 5369 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5370 final float deltaX = eventX - mDownPositionX; 5371 final float deltaY = eventY - mDownPositionY; 5372 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5373 5374 if (mGestureStayedInTapRegion) { 5375 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5376 mGestureStayedInTapRegion = 5377 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5378 } 5379 if (mHaventMovedEnoughToStartDrag) { 5380 // We don't start dragging until the user has moved enough. 5381 mHaventMovedEnoughToStartDrag = 5382 distanceSquared <= touchSlop * touchSlop; 5383 } 5384 } 5385 5386 if (isMouse && !isDragAcceleratorActive()) { 5387 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5388 if (mTextView.hasSelection() 5389 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5390 && offset >= mTextView.getSelectionStart() 5391 && offset <= mTextView.getSelectionEnd()) { 5392 startDragAndDrop(); 5393 break; 5394 } 5395 5396 if (mStartOffset != offset) { 5397 // Start character based drag accelerator. 5398 stopTextActionMode(); 5399 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5400 mDiscardNextActionUp = true; 5401 mHaventMovedEnoughToStartDrag = false; 5402 } 5403 } 5404 5405 if (mStartHandle != null && mStartHandle.isShowing()) { 5406 // Don't do the drag if the handles are showing already. 5407 break; 5408 } 5409 5410 updateSelection(event); 5411 break; 5412 5413 case MotionEvent.ACTION_UP: 5414 if (!isDragAcceleratorActive()) { 5415 break; 5416 } 5417 updateSelection(event); 5418 5419 // No longer dragging to select text, let the parent intercept events. 5420 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5421 5422 // No longer the first dragging motion, reset. 5423 resetDragAcceleratorState(); 5424 5425 if (mTextView.hasSelection()) { 5426 // Drag selection should not be adjusted by the text classifier. 5427 startSelectionActionModeAsync(mHaventMovedEnoughToStartDrag); 5428 } 5429 break; 5430 } 5431 } 5432 5433 private void updateSelection(MotionEvent event) { 5434 if (mTextView.getLayout() != null) { 5435 switch (mDragAcceleratorMode) { 5436 case DRAG_ACCELERATOR_MODE_CHARACTER: 5437 updateCharacterBasedSelection(event); 5438 break; 5439 case DRAG_ACCELERATOR_MODE_WORD: 5440 updateWordBasedSelection(event); 5441 break; 5442 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5443 updateParagraphBasedSelection(event); 5444 break; 5445 } 5446 } 5447 } 5448 5449 /** 5450 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5451 * 5452 * @return true if the drag was started. 5453 */ 5454 private boolean selectCurrentParagraphAndStartDrag() { 5455 if (mInsertionActionModeRunnable != null) { 5456 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5457 } 5458 stopTextActionMode(); 5459 if (!selectCurrentParagraph()) { 5460 return false; 5461 } 5462 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5463 return true; 5464 } 5465 5466 private void updateCharacterBasedSelection(MotionEvent event) { 5467 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5468 Selection.setSelection((Spannable) mTextView.getText(), mStartOffset, offset); 5469 } 5470 5471 private void updateWordBasedSelection(MotionEvent event) { 5472 if (mHaventMovedEnoughToStartDrag) { 5473 return; 5474 } 5475 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5476 final ViewConfiguration viewConfig = ViewConfiguration.get( 5477 mTextView.getContext()); 5478 final float eventX = event.getX(); 5479 final float eventY = event.getY(); 5480 final int currLine; 5481 if (isMouse) { 5482 // No need to offset the y coordinate for mouse input. 5483 currLine = mTextView.getLineAtCoordinate(eventY); 5484 } else { 5485 float y = eventY; 5486 if (mSwitchedLines) { 5487 // Offset the finger by the same vertical offset as the handles. 5488 // This improves visibility of the content being selected by 5489 // shifting the finger below the content, this is applied once 5490 // the user has switched lines. 5491 final int touchSlop = viewConfig.getScaledTouchSlop(); 5492 final float fingerOffset = (mStartHandle != null) 5493 ? mStartHandle.getIdealVerticalOffset() 5494 : touchSlop; 5495 y = eventY - fingerOffset; 5496 } 5497 5498 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5499 y); 5500 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5501 // Break early here, we want to offset the finger position from 5502 // the selection highlight, once the user moved their finger 5503 // to a different line we should apply the offset and *not* switch 5504 // lines until recomputing the position with the finger offset. 5505 mSwitchedLines = true; 5506 return; 5507 } 5508 } 5509 5510 int startOffset; 5511 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5512 // Snap to word boundaries. 5513 if (mStartOffset < offset) { 5514 // Expanding with end handle. 5515 offset = getWordEnd(offset); 5516 startOffset = getWordStart(mStartOffset); 5517 } else { 5518 // Expanding with start handle. 5519 offset = getWordStart(offset); 5520 startOffset = getWordEnd(mStartOffset); 5521 if (startOffset == offset) { 5522 offset = getNextCursorOffset(offset, false); 5523 } 5524 } 5525 mLineSelectionIsOn = currLine; 5526 Selection.setSelection((Spannable) mTextView.getText(), startOffset, offset); 5527 } 5528 5529 private void updateParagraphBasedSelection(MotionEvent event) { 5530 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5531 5532 final int start = Math.min(offset, mStartOffset); 5533 final int end = Math.max(offset, mStartOffset); 5534 final long paragraphsRange = getParagraphsRange(start, end); 5535 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5536 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5537 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5538 } 5539 5540 /** 5541 * @param event 5542 */ 5543 private void updateMinAndMaxOffsets(MotionEvent event) { 5544 int pointerCount = event.getPointerCount(); 5545 for (int index = 0; index < pointerCount; index++) { 5546 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5547 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5548 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5549 } 5550 } 5551 5552 public int getMinTouchOffset() { 5553 return mMinTouchOffset; 5554 } 5555 5556 public int getMaxTouchOffset() { 5557 return mMaxTouchOffset; 5558 } 5559 5560 public void resetTouchOffsets() { 5561 mMinTouchOffset = mMaxTouchOffset = -1; 5562 resetDragAcceleratorState(); 5563 } 5564 5565 private void resetDragAcceleratorState() { 5566 mStartOffset = -1; 5567 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5568 mSwitchedLines = false; 5569 final int selectionStart = mTextView.getSelectionStart(); 5570 final int selectionEnd = mTextView.getSelectionEnd(); 5571 if (selectionStart > selectionEnd) { 5572 Selection.setSelection((Spannable) mTextView.getText(), 5573 selectionEnd, selectionStart); 5574 } 5575 } 5576 5577 /** 5578 * @return true iff this controller is currently used to move the selection start. 5579 */ 5580 public boolean isSelectionStartDragged() { 5581 return mStartHandle != null && mStartHandle.isDragging(); 5582 } 5583 5584 @Override 5585 public boolean isCursorBeingModified() { 5586 return isDragAcceleratorActive() || isSelectionStartDragged() 5587 || (mEndHandle != null && mEndHandle.isDragging()); 5588 } 5589 5590 /** 5591 * @return true if the user is selecting text using the drag accelerator. 5592 */ 5593 public boolean isDragAcceleratorActive() { 5594 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5595 } 5596 5597 public void onTouchModeChanged(boolean isInTouchMode) { 5598 if (!isInTouchMode) { 5599 hide(); 5600 } 5601 } 5602 5603 @Override 5604 public void onDetached() { 5605 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5606 observer.removeOnTouchModeChangeListener(this); 5607 5608 if (mStartHandle != null) mStartHandle.onDetached(); 5609 if (mEndHandle != null) mEndHandle.onDetached(); 5610 } 5611 5612 @Override 5613 public boolean isActive() { 5614 return mStartHandle != null && mStartHandle.isShowing(); 5615 } 5616 5617 public void invalidateHandles() { 5618 if (mStartHandle != null) { 5619 mStartHandle.invalidate(); 5620 } 5621 if (mEndHandle != null) { 5622 mEndHandle.invalidate(); 5623 } 5624 } 5625 } 5626 5627 private class CorrectionHighlighter { 5628 private final Path mPath = new Path(); 5629 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5630 private int mStart, mEnd; 5631 private long mFadingStartTime; 5632 private RectF mTempRectF; 5633 private static final int FADE_OUT_DURATION = 400; 5634 5635 public CorrectionHighlighter() { 5636 mPaint.setCompatibilityScaling( 5637 mTextView.getResources().getCompatibilityInfo().applicationScale); 5638 mPaint.setStyle(Paint.Style.FILL); 5639 } 5640 5641 public void highlight(CorrectionInfo info) { 5642 mStart = info.getOffset(); 5643 mEnd = mStart + info.getNewText().length(); 5644 mFadingStartTime = SystemClock.uptimeMillis(); 5645 5646 if (mStart < 0 || mEnd < 0) { 5647 stopAnimation(); 5648 } 5649 } 5650 5651 public void draw(Canvas canvas, int cursorOffsetVertical) { 5652 if (updatePath() && updatePaint()) { 5653 if (cursorOffsetVertical != 0) { 5654 canvas.translate(0, cursorOffsetVertical); 5655 } 5656 5657 canvas.drawPath(mPath, mPaint); 5658 5659 if (cursorOffsetVertical != 0) { 5660 canvas.translate(0, -cursorOffsetVertical); 5661 } 5662 invalidate(true); // TODO invalidate cursor region only 5663 } else { 5664 stopAnimation(); 5665 invalidate(false); // TODO invalidate cursor region only 5666 } 5667 } 5668 5669 private boolean updatePaint() { 5670 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5671 if (duration > FADE_OUT_DURATION) return false; 5672 5673 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5674 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5675 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5676 + ((int) (highlightColorAlpha * coef) << 24); 5677 mPaint.setColor(color); 5678 return true; 5679 } 5680 5681 private boolean updatePath() { 5682 final Layout layout = mTextView.getLayout(); 5683 if (layout == null) return false; 5684 5685 // Update in case text is edited while the animation is run 5686 final int length = mTextView.getText().length(); 5687 int start = Math.min(length, mStart); 5688 int end = Math.min(length, mEnd); 5689 5690 mPath.reset(); 5691 layout.getSelectionPath(start, end, mPath); 5692 return true; 5693 } 5694 5695 private void invalidate(boolean delayed) { 5696 if (mTextView.getLayout() == null) return; 5697 5698 if (mTempRectF == null) mTempRectF = new RectF(); 5699 mPath.computeBounds(mTempRectF, false); 5700 5701 int left = mTextView.getCompoundPaddingLeft(); 5702 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5703 5704 if (delayed) { 5705 mTextView.postInvalidateOnAnimation( 5706 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5707 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5708 } else { 5709 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5710 (int) mTempRectF.right, (int) mTempRectF.bottom); 5711 } 5712 } 5713 5714 private void stopAnimation() { 5715 Editor.this.mCorrectionHighlighter = null; 5716 } 5717 } 5718 5719 private static class ErrorPopup extends PopupWindow { 5720 private boolean mAbove = false; 5721 private final TextView mView; 5722 private int mPopupInlineErrorBackgroundId = 0; 5723 private int mPopupInlineErrorAboveBackgroundId = 0; 5724 5725 ErrorPopup(TextView v, int width, int height) { 5726 super(v, width, height); 5727 mView = v; 5728 // Make sure the TextView has a background set as it will be used the first time it is 5729 // shown and positioned. Initialized with below background, which should have 5730 // dimensions identical to the above version for this to work (and is more likely). 5731 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5732 com.android.internal.R.styleable.Theme_errorMessageBackground); 5733 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5734 } 5735 5736 void fixDirection(boolean above) { 5737 mAbove = above; 5738 5739 if (above) { 5740 mPopupInlineErrorAboveBackgroundId = 5741 getResourceId(mPopupInlineErrorAboveBackgroundId, 5742 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5743 } else { 5744 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5745 com.android.internal.R.styleable.Theme_errorMessageBackground); 5746 } 5747 5748 mView.setBackgroundResource( 5749 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5750 } 5751 5752 private int getResourceId(int currentId, int index) { 5753 if (currentId == 0) { 5754 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5755 R.styleable.Theme); 5756 currentId = styledAttributes.getResourceId(index, 0); 5757 styledAttributes.recycle(); 5758 } 5759 return currentId; 5760 } 5761 5762 @Override 5763 public void update(int x, int y, int w, int h, boolean force) { 5764 super.update(x, y, w, h, force); 5765 5766 boolean above = isAboveAnchor(); 5767 if (above != mAbove) { 5768 fixDirection(above); 5769 } 5770 } 5771 } 5772 5773 static class InputContentType { 5774 int imeOptions = EditorInfo.IME_NULL; 5775 String privateImeOptions; 5776 CharSequence imeActionLabel; 5777 int imeActionId; 5778 Bundle extras; 5779 OnEditorActionListener onEditorActionListener; 5780 boolean enterDown; 5781 LocaleList imeHintLocales; 5782 } 5783 5784 static class InputMethodState { 5785 ExtractedTextRequest mExtractedTextRequest; 5786 final ExtractedText mExtractedText = new ExtractedText(); 5787 int mBatchEditNesting; 5788 boolean mCursorChanged; 5789 boolean mSelectionModeChanged; 5790 boolean mContentChanged; 5791 int mChangedStart, mChangedEnd, mChangedDelta; 5792 } 5793 5794 /** 5795 * @return True iff (start, end) is a valid range within the text. 5796 */ 5797 private static boolean isValidRange(CharSequence text, int start, int end) { 5798 return 0 <= start && start <= end && end <= text.length(); 5799 } 5800 5801 @VisibleForTesting 5802 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5803 return mSuggestionsPopupWindow; 5804 } 5805 5806 /** 5807 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5808 * text being typed (and hence always returns null from the filter() method). 5809 * 5810 * TODO: Make this span aware. 5811 */ 5812 public static class UndoInputFilter implements InputFilter { 5813 private final Editor mEditor; 5814 5815 // Whether the current filter pass is directly caused by an end-user text edit. 5816 private boolean mIsUserEdit; 5817 5818 // Whether the text field is handling an IME composition. Must be parceled in case the user 5819 // rotates the screen during composition. 5820 private boolean mHasComposition; 5821 5822 // Whether the user is expanding or shortening the text 5823 private boolean mExpanding; 5824 5825 // Whether the previous edit operation was in the current batch edit. 5826 private boolean mPreviousOperationWasInSameBatchEdit; 5827 5828 public UndoInputFilter(Editor editor) { 5829 mEditor = editor; 5830 } 5831 5832 public void saveInstanceState(Parcel parcel) { 5833 parcel.writeInt(mIsUserEdit ? 1 : 0); 5834 parcel.writeInt(mHasComposition ? 1 : 0); 5835 parcel.writeInt(mExpanding ? 1 : 0); 5836 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5837 } 5838 5839 public void restoreInstanceState(Parcel parcel) { 5840 mIsUserEdit = parcel.readInt() != 0; 5841 mHasComposition = parcel.readInt() != 0; 5842 mExpanding = parcel.readInt() != 0; 5843 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5844 } 5845 5846 /** 5847 * Signals that a user-triggered edit is starting. 5848 */ 5849 public void beginBatchEdit() { 5850 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5851 mIsUserEdit = true; 5852 } 5853 5854 public void endBatchEdit() { 5855 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5856 mIsUserEdit = false; 5857 mPreviousOperationWasInSameBatchEdit = false; 5858 } 5859 5860 @Override 5861 public CharSequence filter(CharSequence source, int start, int end, 5862 Spanned dest, int dstart, int dend) { 5863 if (DEBUG_UNDO) { 5864 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 5865 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5866 } 5867 5868 // Check to see if this edit should be tracked for undo. 5869 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5870 return null; 5871 } 5872 5873 final boolean hadComposition = mHasComposition; 5874 mHasComposition = isComposition(source); 5875 final boolean wasExpanding = mExpanding; 5876 boolean shouldCreateSeparateState = false; 5877 if ((end - start) != (dend - dstart)) { 5878 mExpanding = (end - start) > (dend - dstart); 5879 if (hadComposition && mExpanding != wasExpanding) { 5880 shouldCreateSeparateState = true; 5881 } 5882 } 5883 5884 // Handle edit. 5885 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5886 return null; 5887 } 5888 5889 void freezeLastEdit() { 5890 mEditor.mUndoManager.beginUpdate("Edit text"); 5891 EditOperation lastEdit = getLastEdit(); 5892 if (lastEdit != null) { 5893 lastEdit.mFrozen = true; 5894 } 5895 mEditor.mUndoManager.endUpdate(); 5896 } 5897 5898 @Retention(RetentionPolicy.SOURCE) 5899 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5900 private @interface MergeMode {} 5901 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5902 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5903 /** Use {@link EditOperation#mergeWith} to merge */ 5904 private static final int MERGE_EDIT_MODE_NORMAL = 2; 5905 5906 private void handleEdit(CharSequence source, int start, int end, 5907 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5908 // An application may install a TextWatcher to provide additional modifications after 5909 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5910 // string). This results in multiple filter() calls for what the user considers to be 5911 // a single operation. Always undo the whole set of changes in one step. 5912 @MergeMode 5913 final int mergeMode; 5914 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5915 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5916 } else if (shouldCreateSeparateState) { 5917 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5918 } else { 5919 mergeMode = MERGE_EDIT_MODE_NORMAL; 5920 } 5921 // Build a new operation with all the information from this edit. 5922 String newText = TextUtils.substring(source, start, end); 5923 String oldText = TextUtils.substring(dest, dstart, dend); 5924 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5925 mHasComposition); 5926 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5927 return; 5928 } 5929 recordEdit(edit, mergeMode); 5930 } 5931 5932 private EditOperation getLastEdit() { 5933 final UndoManager um = mEditor.mUndoManager; 5934 return um.getLastOperation( 5935 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5936 } 5937 /** 5938 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5939 * If forceMerge is true then the new edit is always merged. 5940 */ 5941 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5942 // Fetch the last edit operation and attempt to merge in the new edit. 5943 final UndoManager um = mEditor.mUndoManager; 5944 um.beginUpdate("Edit text"); 5945 EditOperation lastEdit = getLastEdit(); 5946 if (lastEdit == null) { 5947 // Add this as the first edit. 5948 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5949 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5950 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5951 // Forced merges take priority because they could be the result of a non-user-edit 5952 // change and this case should not create a new undo operation. 5953 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5954 lastEdit.forceMergeWith(edit); 5955 } else if (!mIsUserEdit) { 5956 // An application directly modified the Editable outside of a text edit. Treat this 5957 // as a new change and don't attempt to merge. 5958 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5959 um.commitState(mEditor.mUndoOwner); 5960 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5961 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 5962 // Merge succeeded, nothing else to do. 5963 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5964 } else { 5965 // Could not merge with the last edit, so commit the last edit and add this edit. 5966 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5967 um.commitState(mEditor.mUndoOwner); 5968 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5969 } 5970 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 5971 um.endUpdate(); 5972 } 5973 5974 private boolean canUndoEdit(CharSequence source, int start, int end, 5975 Spanned dest, int dstart, int dend) { 5976 if (!mEditor.mAllowUndo) { 5977 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5978 return false; 5979 } 5980 5981 if (mEditor.mUndoManager.isInUndo()) { 5982 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5983 return false; 5984 } 5985 5986 // Text filters run before input operations are applied. However, some input operations 5987 // are invalid and will throw exceptions when applied. This is common in tests. Don't 5988 // attempt to undo invalid operations. 5989 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 5990 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 5991 return false; 5992 } 5993 5994 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 5995 // on an input field. Skip no-op changes. 5996 if (start == end && dstart == dend) { 5997 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 5998 return false; 5999 } 6000 6001 return true; 6002 } 6003 6004 private static boolean isComposition(CharSequence source) { 6005 if (!(source instanceof Spannable)) { 6006 return false; 6007 } 6008 // This is a composition edit if the source has a non-zero-length composing span. 6009 Spannable text = (Spannable) source; 6010 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6011 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6012 return composeBegin < composeEnd; 6013 } 6014 6015 private boolean isInTextWatcher() { 6016 CharSequence text = mEditor.mTextView.getText(); 6017 return (text instanceof SpannableStringBuilder) 6018 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6019 } 6020 } 6021 6022 /** 6023 * An operation to undo a single "edit" to a text view. 6024 */ 6025 public static class EditOperation extends UndoOperation<Editor> { 6026 private static final int TYPE_INSERT = 0; 6027 private static final int TYPE_DELETE = 1; 6028 private static final int TYPE_REPLACE = 2; 6029 6030 private int mType; 6031 private String mOldText; 6032 private String mNewText; 6033 private int mStart; 6034 6035 private int mOldCursorPos; 6036 private int mNewCursorPos; 6037 private boolean mFrozen; 6038 private boolean mIsComposition; 6039 6040 /** 6041 * Constructs an edit operation from a text input operation on editor that replaces the 6042 * oldText starting at dstart with newText. 6043 */ 6044 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6045 boolean isComposition) { 6046 super(editor.mUndoOwner); 6047 mOldText = oldText; 6048 mNewText = newText; 6049 6050 // Determine the type of the edit. 6051 if (mNewText.length() > 0 && mOldText.length() == 0) { 6052 mType = TYPE_INSERT; 6053 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6054 mType = TYPE_DELETE; 6055 } else { 6056 mType = TYPE_REPLACE; 6057 } 6058 6059 mStart = dstart; 6060 // Store cursor data. 6061 mOldCursorPos = editor.mTextView.getSelectionStart(); 6062 mNewCursorPos = dstart + mNewText.length(); 6063 mIsComposition = isComposition; 6064 } 6065 6066 public EditOperation(Parcel src, ClassLoader loader) { 6067 super(src, loader); 6068 mType = src.readInt(); 6069 mOldText = src.readString(); 6070 mNewText = src.readString(); 6071 mStart = src.readInt(); 6072 mOldCursorPos = src.readInt(); 6073 mNewCursorPos = src.readInt(); 6074 mFrozen = src.readInt() == 1; 6075 mIsComposition = src.readInt() == 1; 6076 } 6077 6078 @Override 6079 public void writeToParcel(Parcel dest, int flags) { 6080 dest.writeInt(mType); 6081 dest.writeString(mOldText); 6082 dest.writeString(mNewText); 6083 dest.writeInt(mStart); 6084 dest.writeInt(mOldCursorPos); 6085 dest.writeInt(mNewCursorPos); 6086 dest.writeInt(mFrozen ? 1 : 0); 6087 dest.writeInt(mIsComposition ? 1 : 0); 6088 } 6089 6090 private int getNewTextEnd() { 6091 return mStart + mNewText.length(); 6092 } 6093 6094 private int getOldTextEnd() { 6095 return mStart + mOldText.length(); 6096 } 6097 6098 @Override 6099 public void commit() { 6100 } 6101 6102 @Override 6103 public void undo() { 6104 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6105 // Remove the new text and insert the old. 6106 Editor editor = getOwnerData(); 6107 Editable text = (Editable) editor.mTextView.getText(); 6108 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6109 } 6110 6111 @Override 6112 public void redo() { 6113 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6114 // Remove the old text and insert the new. 6115 Editor editor = getOwnerData(); 6116 Editable text = (Editable) editor.mTextView.getText(); 6117 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6118 } 6119 6120 /** 6121 * Attempts to merge this existing operation with a new edit. 6122 * @param edit The new edit operation. 6123 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6124 * object unchanged. 6125 */ 6126 private boolean mergeWith(EditOperation edit) { 6127 if (DEBUG_UNDO) { 6128 Log.d(TAG, "mergeWith old " + this); 6129 Log.d(TAG, "mergeWith new " + edit); 6130 } 6131 6132 if (mFrozen) { 6133 return false; 6134 } 6135 6136 switch (mType) { 6137 case TYPE_INSERT: 6138 return mergeInsertWith(edit); 6139 case TYPE_DELETE: 6140 return mergeDeleteWith(edit); 6141 case TYPE_REPLACE: 6142 return mergeReplaceWith(edit); 6143 default: 6144 return false; 6145 } 6146 } 6147 6148 private boolean mergeInsertWith(EditOperation edit) { 6149 if (edit.mType == TYPE_INSERT) { 6150 // Merge insertions that are contiguous even when it's frozen. 6151 if (getNewTextEnd() != edit.mStart) { 6152 return false; 6153 } 6154 mNewText += edit.mNewText; 6155 mNewCursorPos = edit.mNewCursorPos; 6156 mFrozen = edit.mFrozen; 6157 mIsComposition = edit.mIsComposition; 6158 return true; 6159 } 6160 if (mIsComposition && edit.mType == TYPE_REPLACE 6161 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6162 // Merge insertion with replace as they can be single insertion. 6163 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6164 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6165 mNewCursorPos = edit.mNewCursorPos; 6166 mIsComposition = edit.mIsComposition; 6167 return true; 6168 } 6169 return false; 6170 } 6171 6172 // TODO: Support forward delete. 6173 private boolean mergeDeleteWith(EditOperation edit) { 6174 // Only merge continuous deletes. 6175 if (edit.mType != TYPE_DELETE) { 6176 return false; 6177 } 6178 // Only merge deletions that are contiguous. 6179 if (mStart != edit.getOldTextEnd()) { 6180 return false; 6181 } 6182 mStart = edit.mStart; 6183 mOldText = edit.mOldText + mOldText; 6184 mNewCursorPos = edit.mNewCursorPos; 6185 mIsComposition = edit.mIsComposition; 6186 return true; 6187 } 6188 6189 private boolean mergeReplaceWith(EditOperation edit) { 6190 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6191 // Merge with adjacent insert. 6192 mNewText += edit.mNewText; 6193 mNewCursorPos = edit.mNewCursorPos; 6194 return true; 6195 } 6196 if (!mIsComposition) { 6197 return false; 6198 } 6199 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6200 && getNewTextEnd() >= edit.getOldTextEnd()) { 6201 // Merge with delete as they can be single operation. 6202 mNewText = mNewText.substring(0, edit.mStart - mStart) 6203 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6204 if (mNewText.isEmpty()) { 6205 mType = TYPE_DELETE; 6206 } 6207 mNewCursorPos = edit.mNewCursorPos; 6208 mIsComposition = edit.mIsComposition; 6209 return true; 6210 } 6211 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6212 && TextUtils.equals(mNewText, edit.mOldText)) { 6213 // Merge with the replace that replaces the same region. 6214 mNewText = edit.mNewText; 6215 mNewCursorPos = edit.mNewCursorPos; 6216 mIsComposition = edit.mIsComposition; 6217 return true; 6218 } 6219 return false; 6220 } 6221 6222 /** 6223 * Forcibly creates a single merged edit operation by simulating the entire text 6224 * contents being replaced. 6225 */ 6226 public void forceMergeWith(EditOperation edit) { 6227 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6228 if (mergeWith(edit)) { 6229 return; 6230 } 6231 Editor editor = getOwnerData(); 6232 6233 // Copy the text of the current field. 6234 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6235 // but would require two parallel implementations of modifyText() because Editable and 6236 // StringBuilder do not share an interface for replace/delete/insert. 6237 Editable editable = (Editable) editor.mTextView.getText(); 6238 Editable originalText = new SpannableStringBuilder(editable.toString()); 6239 6240 // Roll back the last operation. 6241 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6242 6243 // Clone the text again and apply the new operation. 6244 Editable finalText = new SpannableStringBuilder(editable.toString()); 6245 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6246 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6247 6248 // Convert this operation into a replace operation. 6249 mType = TYPE_REPLACE; 6250 mNewText = finalText.toString(); 6251 mOldText = originalText.toString(); 6252 mStart = 0; 6253 mNewCursorPos = edit.mNewCursorPos; 6254 mIsComposition = edit.mIsComposition; 6255 // mOldCursorPos is unchanged. 6256 } 6257 6258 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6259 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6260 // Apply the edit if it is still valid. 6261 if (isValidRange(text, deleteFrom, deleteTo) 6262 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6263 if (deleteFrom != deleteTo) { 6264 text.delete(deleteFrom, deleteTo); 6265 } 6266 if (newText.length() != 0) { 6267 text.insert(newTextInsertAt, newText); 6268 } 6269 } 6270 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6271 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6272 // TODO: Select all the text that was undone. 6273 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6274 Selection.setSelection(text, newCursorPos); 6275 } 6276 } 6277 6278 private String getTypeString() { 6279 switch (mType) { 6280 case TYPE_INSERT: 6281 return "insert"; 6282 case TYPE_DELETE: 6283 return "delete"; 6284 case TYPE_REPLACE: 6285 return "replace"; 6286 default: 6287 return ""; 6288 } 6289 } 6290 6291 @Override 6292 public String toString() { 6293 return "[mType=" + getTypeString() + ", " 6294 + "mOldText=" + mOldText + ", " 6295 + "mNewText=" + mNewText + ", " 6296 + "mStart=" + mStart + ", " 6297 + "mOldCursorPos=" + mOldCursorPos + ", " 6298 + "mNewCursorPos=" + mNewCursorPos + ", " 6299 + "mFrozen=" + mFrozen + ", " 6300 + "mIsComposition=" + mIsComposition + "]"; 6301 } 6302 6303 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6304 new Parcelable.ClassLoaderCreator<EditOperation>() { 6305 @Override 6306 public EditOperation createFromParcel(Parcel in) { 6307 return new EditOperation(in, null); 6308 } 6309 6310 @Override 6311 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6312 return new EditOperation(in, loader); 6313 } 6314 6315 @Override 6316 public EditOperation[] newArray(int size) { 6317 return new EditOperation[size]; 6318 } 6319 }; 6320 } 6321 6322 /** 6323 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6324 * These allow external applications to plug into currently selected text. 6325 */ 6326 static final class ProcessTextIntentActionsHandler { 6327 6328 private final Editor mEditor; 6329 private final TextView mTextView; 6330 private final Context mContext; 6331 private final PackageManager mPackageManager; 6332 private final String mPackageName; 6333 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6334 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6335 new SparseArray<>(); 6336 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6337 6338 private ProcessTextIntentActionsHandler(Editor editor) { 6339 mEditor = Preconditions.checkNotNull(editor); 6340 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6341 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6342 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6343 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6344 } 6345 6346 /** 6347 * Adds "PROCESS_TEXT" menu items to the specified menu. 6348 */ 6349 public void onInitializeMenu(Menu menu) { 6350 final int size = mSupportedActivities.size(); 6351 loadSupportedActivities(); 6352 for (int i = 0; i < size; i++) { 6353 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6354 menu.add(Menu.NONE, Menu.NONE, 6355 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6356 getLabel(resolveInfo)) 6357 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6358 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6359 } 6360 } 6361 6362 /** 6363 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6364 * menu item. 6365 * 6366 * @return True if the action was performed, false otherwise. 6367 */ 6368 public boolean performMenuItemAction(MenuItem item) { 6369 return fireIntent(item.getIntent()); 6370 } 6371 6372 /** 6373 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6374 */ 6375 public void initializeAccessibilityActions() { 6376 mAccessibilityIntents.clear(); 6377 mAccessibilityActions.clear(); 6378 int i = 0; 6379 loadSupportedActivities(); 6380 for (ResolveInfo resolveInfo : mSupportedActivities) { 6381 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6382 mAccessibilityActions.put( 6383 actionId, 6384 new AccessibilityNodeInfo.AccessibilityAction( 6385 actionId, getLabel(resolveInfo))); 6386 mAccessibilityIntents.put( 6387 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6388 } 6389 } 6390 6391 /** 6392 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6393 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6394 * latest accessibility actions available for this call. 6395 */ 6396 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6397 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6398 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6399 } 6400 } 6401 6402 /** 6403 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6404 * accessibility action id. 6405 * 6406 * @return True if the action was performed, false otherwise. 6407 */ 6408 public boolean performAccessibilityAction(int actionId) { 6409 return fireIntent(mAccessibilityIntents.get(actionId)); 6410 } 6411 6412 private boolean fireIntent(Intent intent) { 6413 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6414 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 6415 mEditor.mPreserveSelection = true; 6416 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6417 return true; 6418 } 6419 return false; 6420 } 6421 6422 private void loadSupportedActivities() { 6423 mSupportedActivities.clear(); 6424 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6425 List<ResolveInfo> unfiltered = 6426 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6427 for (ResolveInfo info : unfiltered) { 6428 if (isSupportedActivity(info)) { 6429 mSupportedActivities.add(info); 6430 } 6431 } 6432 } 6433 6434 private boolean isSupportedActivity(ResolveInfo info) { 6435 return mPackageName.equals(info.activityInfo.packageName) 6436 || info.activityInfo.exported 6437 && (info.activityInfo.permission == null 6438 || mContext.checkSelfPermission(info.activityInfo.permission) 6439 == PackageManager.PERMISSION_GRANTED); 6440 } 6441 6442 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6443 return createProcessTextIntent() 6444 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6445 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6446 } 6447 6448 private Intent createProcessTextIntent() { 6449 return new Intent() 6450 .setAction(Intent.ACTION_PROCESS_TEXT) 6451 .setType("text/plain"); 6452 } 6453 6454 private CharSequence getLabel(ResolveInfo resolveInfo) { 6455 return resolveInfo.loadLabel(mPackageManager); 6456 } 6457 } 6458} 6459