Editor.java revision 5ddd3ed8556b9bd5a991d97da84fb78a456f6363
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.IntDef; 21import android.annotation.NonNull; 22import android.annotation.Nullable; 23import android.app.PendingIntent; 24import android.app.PendingIntent.CanceledException; 25import android.content.ClipData; 26import android.content.ClipData.Item; 27import android.content.Context; 28import android.content.Intent; 29import android.content.UndoManager; 30import android.content.UndoOperation; 31import android.content.UndoOwner; 32import android.content.pm.PackageManager; 33import android.content.pm.ResolveInfo; 34import android.content.res.TypedArray; 35import android.graphics.Canvas; 36import android.graphics.Color; 37import android.graphics.Matrix; 38import android.graphics.Paint; 39import android.graphics.Path; 40import android.graphics.Rect; 41import android.graphics.RectF; 42import android.graphics.drawable.ColorDrawable; 43import android.graphics.drawable.Drawable; 44import android.metrics.LogMaker; 45import android.os.Bundle; 46import android.os.LocaleList; 47import android.os.Parcel; 48import android.os.Parcelable; 49import android.os.ParcelableParcel; 50import android.os.SystemClock; 51import android.provider.Settings; 52import android.text.DynamicLayout; 53import android.text.Editable; 54import android.text.InputFilter; 55import android.text.InputType; 56import android.text.Layout; 57import android.text.ParcelableSpan; 58import android.text.Selection; 59import android.text.SpanWatcher; 60import android.text.Spannable; 61import android.text.SpannableStringBuilder; 62import android.text.Spanned; 63import android.text.StaticLayout; 64import android.text.TextUtils; 65import android.text.method.KeyListener; 66import android.text.method.MetaKeyKeyListener; 67import android.text.method.MovementMethod; 68import android.text.method.WordIterator; 69import android.text.style.EasyEditSpan; 70import android.text.style.SuggestionRangeSpan; 71import android.text.style.SuggestionSpan; 72import android.text.style.TextAppearanceSpan; 73import android.text.style.URLSpan; 74import android.util.ArraySet; 75import android.util.DisplayMetrics; 76import android.util.Log; 77import android.util.SparseArray; 78import android.view.ActionMode; 79import android.view.ActionMode.Callback; 80import android.view.ContextMenu; 81import android.view.ContextThemeWrapper; 82import android.view.DisplayListCanvas; 83import android.view.DragAndDropPermissions; 84import android.view.DragEvent; 85import android.view.Gravity; 86import android.view.HapticFeedbackConstants; 87import android.view.InputDevice; 88import android.view.LayoutInflater; 89import android.view.Menu; 90import android.view.MenuItem; 91import android.view.MotionEvent; 92import android.view.RenderNode; 93import android.view.SubMenu; 94import android.view.View; 95import android.view.View.DragShadowBuilder; 96import android.view.View.OnClickListener; 97import android.view.ViewConfiguration; 98import android.view.ViewGroup; 99import android.view.ViewGroup.LayoutParams; 100import android.view.ViewTreeObserver; 101import android.view.WindowManager; 102import android.view.accessibility.AccessibilityNodeInfo; 103import android.view.inputmethod.CorrectionInfo; 104import android.view.inputmethod.CursorAnchorInfo; 105import android.view.inputmethod.EditorInfo; 106import android.view.inputmethod.ExtractedText; 107import android.view.inputmethod.ExtractedTextRequest; 108import android.view.inputmethod.InputConnection; 109import android.view.inputmethod.InputMethodManager; 110import android.view.textclassifier.TextClassification; 111import android.widget.AdapterView.OnItemClickListener; 112import android.widget.TextView.Drawables; 113import android.widget.TextView.OnEditorActionListener; 114 115import com.android.internal.annotations.VisibleForTesting; 116import com.android.internal.logging.MetricsLogger; 117import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 118import com.android.internal.util.ArrayUtils; 119import com.android.internal.util.GrowingArrayUtils; 120import com.android.internal.util.Preconditions; 121import com.android.internal.widget.EditableInputConnection; 122 123import java.lang.annotation.Retention; 124import java.lang.annotation.RetentionPolicy; 125import java.text.BreakIterator; 126import java.util.ArrayList; 127import java.util.Arrays; 128import java.util.Comparator; 129import java.util.HashMap; 130import java.util.List; 131 132 133/** 134 * Helper class used by TextView to handle editable text views. 135 * 136 * @hide 137 */ 138public class Editor { 139 private static final String TAG = "Editor"; 140 private static final boolean DEBUG_UNDO = false; 141 142 static final int BLINK = 500; 143 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 144 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 145 private static final int UNSET_X_VALUE = -1; 146 private static final int UNSET_LINE = -1; 147 // Tag used when the Editor maintains its own separate UndoManager. 148 private static final String UNDO_OWNER_TAG = "Editor"; 149 150 // Ordering constants used to place the Action Mode or context menu items in their menu. 151 private static final int MENU_ITEM_ORDER_ASSIST = 0; 152 private static final int MENU_ITEM_ORDER_UNDO = 2; 153 private static final int MENU_ITEM_ORDER_REDO = 3; 154 private static final int MENU_ITEM_ORDER_CUT = 4; 155 private static final int MENU_ITEM_ORDER_COPY = 5; 156 private static final int MENU_ITEM_ORDER_PASTE = 6; 157 private static final int MENU_ITEM_ORDER_SHARE = 7; 158 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 159 private static final int MENU_ITEM_ORDER_REPLACE = 9; 160 private static final int MENU_ITEM_ORDER_AUTOFILL = 10; 161 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 11; 162 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 163 164 // Each Editor manages its own undo stack. 165 private final UndoManager mUndoManager = new UndoManager(); 166 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 167 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 168 boolean mAllowUndo = true; 169 170 private final MetricsLogger mMetricsLogger = new MetricsLogger(); 171 172 // Cursor Controllers. 173 private InsertionPointCursorController mInsertionPointCursorController; 174 SelectionModifierCursorController mSelectionModifierCursorController; 175 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 176 private ActionMode mTextActionMode; 177 private boolean mInsertionControllerEnabled; 178 private boolean mSelectionControllerEnabled; 179 180 private final boolean mHapticTextHandleEnabled; 181 182 // Used to highlight a word when it is corrected by the IME 183 private CorrectionHighlighter mCorrectionHighlighter; 184 185 InputContentType mInputContentType; 186 InputMethodState mInputMethodState; 187 188 private static class TextRenderNode { 189 // Render node has 3 recording states: 190 // 1. Recorded operations are valid. 191 // #needsRecord() returns false, but needsToBeShifted is false. 192 // 2. Recorded operations are not valid, but just the position needed to be updated. 193 // #needsRecord() returns false, but needsToBeShifted is true. 194 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 195 // true. 196 RenderNode renderNode; 197 boolean isDirty; 198 // Becomes true when recorded operations can be reused, but the position has to be updated. 199 boolean needsToBeShifted; 200 public TextRenderNode(String name) { 201 renderNode = RenderNode.create(name, null); 202 isDirty = true; 203 needsToBeShifted = true; 204 } 205 boolean needsRecord() { 206 return isDirty || !renderNode.isValid(); 207 } 208 } 209 private TextRenderNode[] mTextRenderNodes; 210 211 boolean mFrozenWithFocus; 212 boolean mSelectionMoved; 213 boolean mTouchFocusSelected; 214 215 KeyListener mKeyListener; 216 int mInputType = EditorInfo.TYPE_NULL; 217 218 boolean mDiscardNextActionUp; 219 boolean mIgnoreActionUpEvent; 220 221 long mShowCursor; 222 private Blink mBlink; 223 224 boolean mCursorVisible = true; 225 boolean mSelectAllOnFocus; 226 boolean mTextIsSelectable; 227 228 CharSequence mError; 229 boolean mErrorWasChanged; 230 private ErrorPopup mErrorPopup; 231 232 /** 233 * This flag is set if the TextView tries to display an error before it 234 * is attached to the window (so its position is still unknown). 235 * It causes the error to be shown later, when onAttachedToWindow() 236 * is called. 237 */ 238 private boolean mShowErrorAfterAttach; 239 240 boolean mInBatchEditControllers; 241 boolean mShowSoftInputOnFocus = true; 242 private boolean mPreserveSelection; 243 private boolean mRestartActionModeOnNextRefresh; 244 245 private SelectionActionModeHelper mSelectionActionModeHelper; 246 247 boolean mIsBeingLongClicked; 248 249 private SuggestionsPopupWindow mSuggestionsPopupWindow; 250 SuggestionRangeSpan mSuggestionRangeSpan; 251 private Runnable mShowSuggestionRunnable; 252 253 final Drawable[] mCursorDrawable = new Drawable[2]; 254 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 255 256 private Drawable mSelectHandleLeft; 257 private Drawable mSelectHandleRight; 258 private Drawable mSelectHandleCenter; 259 260 // Global listener that detects changes in the global position of the TextView 261 private PositionListener mPositionListener; 262 263 private float mLastDownPositionX, mLastDownPositionY; 264 private float mContextMenuAnchorX, mContextMenuAnchorY; 265 Callback mCustomSelectionActionModeCallback; 266 Callback mCustomInsertionActionModeCallback; 267 268 // Set when this TextView gained focus with some text selected. Will start selection mode. 269 boolean mCreatedWithASelection; 270 271 // Indicates the current tap state (first tap, double tap, or triple click). 272 private int mTapState = TAP_STATE_INITIAL; 273 private long mLastTouchUpTime = 0; 274 private static final int TAP_STATE_INITIAL = 0; 275 private static final int TAP_STATE_FIRST_TAP = 1; 276 private static final int TAP_STATE_DOUBLE_TAP = 2; 277 // Only for mouse input. 278 private static final int TAP_STATE_TRIPLE_CLICK = 3; 279 280 // The button state as of the last time #onTouchEvent is called. 281 private int mLastButtonState; 282 283 private Runnable mInsertionActionModeRunnable; 284 285 // The span controller helps monitoring the changes to which the Editor needs to react: 286 // - EasyEditSpans, for which we have some UI to display on attach and on hide 287 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 288 private SpanController mSpanController; 289 290 private WordIterator mWordIterator; 291 SpellChecker mSpellChecker; 292 293 // This word iterator is set with text and used to determine word boundaries 294 // when a user is selecting text. 295 private WordIterator mWordIteratorWithText; 296 // Indicate that the text in the word iterator needs to be updated. 297 private boolean mUpdateWordIteratorText; 298 299 private Rect mTempRect; 300 301 private final TextView mTextView; 302 303 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 304 305 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 306 new CursorAnchorInfoNotifier(); 307 308 private final Runnable mShowFloatingToolbar = new Runnable() { 309 @Override 310 public void run() { 311 if (mTextActionMode != null) { 312 mTextActionMode.hide(0); // hide off. 313 } 314 } 315 }; 316 317 boolean mIsInsertionActionModeStartPending = false; 318 319 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 320 321 Editor(TextView textView) { 322 mTextView = textView; 323 // Synchronize the filter list, which places the undo input filter at the end. 324 mTextView.setFilters(mTextView.getFilters()); 325 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 326 mHapticTextHandleEnabled = mTextView.getContext().getResources().getBoolean( 327 com.android.internal.R.bool.config_enableHapticTextHandle); 328 } 329 330 ParcelableParcel saveInstanceState() { 331 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 332 Parcel parcel = state.getParcel(); 333 mUndoManager.saveInstanceState(parcel); 334 mUndoInputFilter.saveInstanceState(parcel); 335 return state; 336 } 337 338 void restoreInstanceState(ParcelableParcel state) { 339 Parcel parcel = state.getParcel(); 340 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 341 mUndoInputFilter.restoreInstanceState(parcel); 342 // Re-associate this object as the owner of undo state. 343 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 344 } 345 346 /** 347 * Forgets all undo and redo operations for this Editor. 348 */ 349 void forgetUndoRedo() { 350 UndoOwner[] owners = { mUndoOwner }; 351 mUndoManager.forgetUndos(owners, -1 /* all */); 352 mUndoManager.forgetRedos(owners, -1 /* all */); 353 } 354 355 boolean canUndo() { 356 UndoOwner[] owners = { mUndoOwner }; 357 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 358 } 359 360 boolean canRedo() { 361 UndoOwner[] owners = { mUndoOwner }; 362 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 363 } 364 365 void undo() { 366 if (!mAllowUndo) { 367 return; 368 } 369 UndoOwner[] owners = { mUndoOwner }; 370 mUndoManager.undo(owners, 1); // Undo 1 action. 371 } 372 373 void redo() { 374 if (!mAllowUndo) { 375 return; 376 } 377 UndoOwner[] owners = { mUndoOwner }; 378 mUndoManager.redo(owners, 1); // Redo 1 action. 379 } 380 381 void replace() { 382 if (mSuggestionsPopupWindow == null) { 383 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 384 } 385 hideCursorAndSpanControllers(); 386 mSuggestionsPopupWindow.show(); 387 388 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 389 Selection.setSelection((Spannable) mTextView.getText(), middle); 390 } 391 392 void onAttachedToWindow() { 393 if (mShowErrorAfterAttach) { 394 showError(); 395 mShowErrorAfterAttach = false; 396 } 397 398 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 399 // No need to create the controller. 400 // The get method will add the listener on controller creation. 401 if (mInsertionPointCursorController != null) { 402 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 403 } 404 if (mSelectionModifierCursorController != null) { 405 mSelectionModifierCursorController.resetTouchOffsets(); 406 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 407 } 408 updateSpellCheckSpans(0, mTextView.getText().length(), 409 true /* create the spell checker if needed */); 410 411 if (mTextView.hasSelection()) { 412 refreshTextActionMode(); 413 } 414 415 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 416 resumeBlink(); 417 } 418 419 void onDetachedFromWindow() { 420 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 421 422 if (mError != null) { 423 hideError(); 424 } 425 426 suspendBlink(); 427 428 if (mInsertionPointCursorController != null) { 429 mInsertionPointCursorController.onDetached(); 430 } 431 432 if (mSelectionModifierCursorController != null) { 433 mSelectionModifierCursorController.onDetached(); 434 } 435 436 if (mShowSuggestionRunnable != null) { 437 mTextView.removeCallbacks(mShowSuggestionRunnable); 438 } 439 440 // Cancel the single tap delayed runnable. 441 if (mInsertionActionModeRunnable != null) { 442 mTextView.removeCallbacks(mInsertionActionModeRunnable); 443 } 444 445 mTextView.removeCallbacks(mShowFloatingToolbar); 446 447 discardTextDisplayLists(); 448 449 if (mSpellChecker != null) { 450 mSpellChecker.closeSession(); 451 // Forces the creation of a new SpellChecker next time this window is created. 452 // Will handle the cases where the settings has been changed in the meantime. 453 mSpellChecker = null; 454 } 455 456 hideCursorAndSpanControllers(); 457 stopTextActionModeWithPreservingSelection(); 458 } 459 460 private void discardTextDisplayLists() { 461 if (mTextRenderNodes != null) { 462 for (int i = 0; i < mTextRenderNodes.length; i++) { 463 RenderNode displayList = mTextRenderNodes[i] != null 464 ? mTextRenderNodes[i].renderNode : null; 465 if (displayList != null && displayList.isValid()) { 466 displayList.discardDisplayList(); 467 } 468 } 469 } 470 } 471 472 private void showError() { 473 if (mTextView.getWindowToken() == null) { 474 mShowErrorAfterAttach = true; 475 return; 476 } 477 478 if (mErrorPopup == null) { 479 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 480 final TextView err = (TextView) inflater.inflate( 481 com.android.internal.R.layout.textview_hint, null); 482 483 final float scale = mTextView.getResources().getDisplayMetrics().density; 484 mErrorPopup = 485 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 486 mErrorPopup.setFocusable(false); 487 // The user is entering text, so the input method is needed. We 488 // don't want the popup to be displayed on top of it. 489 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 490 } 491 492 TextView tv = (TextView) mErrorPopup.getContentView(); 493 chooseSize(mErrorPopup, mError, tv); 494 tv.setText(mError); 495 496 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 497 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 498 } 499 500 public void setError(CharSequence error, Drawable icon) { 501 mError = TextUtils.stringOrSpannedString(error); 502 mErrorWasChanged = true; 503 504 if (mError == null) { 505 setErrorIcon(null); 506 if (mErrorPopup != null) { 507 if (mErrorPopup.isShowing()) { 508 mErrorPopup.dismiss(); 509 } 510 511 mErrorPopup = null; 512 } 513 mShowErrorAfterAttach = false; 514 } else { 515 setErrorIcon(icon); 516 if (mTextView.isFocused()) { 517 showError(); 518 } 519 } 520 } 521 522 private void setErrorIcon(Drawable icon) { 523 Drawables dr = mTextView.mDrawables; 524 if (dr == null) { 525 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 526 } 527 dr.setErrorDrawable(icon, mTextView); 528 529 mTextView.resetResolvedDrawables(); 530 mTextView.invalidate(); 531 mTextView.requestLayout(); 532 } 533 534 private void hideError() { 535 if (mErrorPopup != null) { 536 if (mErrorPopup.isShowing()) { 537 mErrorPopup.dismiss(); 538 } 539 } 540 541 mShowErrorAfterAttach = false; 542 } 543 544 /** 545 * Returns the X offset to make the pointy top of the error point 546 * at the middle of the error icon. 547 */ 548 private int getErrorX() { 549 /* 550 * The "25" is the distance between the point and the right edge 551 * of the background 552 */ 553 final float scale = mTextView.getResources().getDisplayMetrics().density; 554 555 final Drawables dr = mTextView.mDrawables; 556 557 final int layoutDirection = mTextView.getLayoutDirection(); 558 int errorX; 559 int offset; 560 switch (layoutDirection) { 561 default: 562 case View.LAYOUT_DIRECTION_LTR: 563 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 564 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 565 - mTextView.getPaddingRight() + offset; 566 break; 567 case View.LAYOUT_DIRECTION_RTL: 568 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 569 errorX = mTextView.getPaddingLeft() + offset; 570 break; 571 } 572 return errorX; 573 } 574 575 /** 576 * Returns the Y offset to make the pointy top of the error point 577 * at the bottom of the error icon. 578 */ 579 private int getErrorY() { 580 /* 581 * Compound, not extended, because the icon is not clipped 582 * if the text height is smaller. 583 */ 584 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 585 int vspace = mTextView.getBottom() - mTextView.getTop() 586 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 587 588 final Drawables dr = mTextView.mDrawables; 589 590 final int layoutDirection = mTextView.getLayoutDirection(); 591 int height; 592 switch (layoutDirection) { 593 default: 594 case View.LAYOUT_DIRECTION_LTR: 595 height = (dr != null ? dr.mDrawableHeightRight : 0); 596 break; 597 case View.LAYOUT_DIRECTION_RTL: 598 height = (dr != null ? dr.mDrawableHeightLeft : 0); 599 break; 600 } 601 602 int icontop = compoundPaddingTop + (vspace - height) / 2; 603 604 /* 605 * The "2" is the distance between the point and the top edge 606 * of the background. 607 */ 608 final float scale = mTextView.getResources().getDisplayMetrics().density; 609 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 610 } 611 612 void createInputContentTypeIfNeeded() { 613 if (mInputContentType == null) { 614 mInputContentType = new InputContentType(); 615 } 616 } 617 618 void createInputMethodStateIfNeeded() { 619 if (mInputMethodState == null) { 620 mInputMethodState = new InputMethodState(); 621 } 622 } 623 624 boolean isCursorVisible() { 625 // The default value is true, even when there is no associated Editor 626 return mCursorVisible && mTextView.isTextEditable(); 627 } 628 629 void prepareCursorControllers() { 630 boolean windowSupportsHandles = false; 631 632 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 633 if (params instanceof WindowManager.LayoutParams) { 634 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 635 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 636 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 637 } 638 639 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 640 mInsertionControllerEnabled = enabled && isCursorVisible(); 641 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 642 643 if (!mInsertionControllerEnabled) { 644 hideInsertionPointCursorController(); 645 if (mInsertionPointCursorController != null) { 646 mInsertionPointCursorController.onDetached(); 647 mInsertionPointCursorController = null; 648 } 649 } 650 651 if (!mSelectionControllerEnabled) { 652 stopTextActionMode(); 653 if (mSelectionModifierCursorController != null) { 654 mSelectionModifierCursorController.onDetached(); 655 mSelectionModifierCursorController = null; 656 } 657 } 658 } 659 660 void hideInsertionPointCursorController() { 661 if (mInsertionPointCursorController != null) { 662 mInsertionPointCursorController.hide(); 663 } 664 } 665 666 /** 667 * Hides the insertion and span controllers. 668 */ 669 void hideCursorAndSpanControllers() { 670 hideCursorControllers(); 671 hideSpanControllers(); 672 } 673 674 private void hideSpanControllers() { 675 if (mSpanController != null) { 676 mSpanController.hide(); 677 } 678 } 679 680 private void hideCursorControllers() { 681 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 682 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 683 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 684 // to distinguish one from the other. 685 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 686 || !mSuggestionsPopupWindow.isShowingUp())) { 687 // Should be done before hide insertion point controller since it triggers a show of it 688 mSuggestionsPopupWindow.hide(); 689 } 690 hideInsertionPointCursorController(); 691 } 692 693 /** 694 * Create new SpellCheckSpans on the modified region. 695 */ 696 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 697 // Remove spans whose adjacent characters are text not punctuation 698 mTextView.removeAdjacentSuggestionSpans(start); 699 mTextView.removeAdjacentSuggestionSpans(end); 700 701 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 702 && !(mTextView.isInExtractedMode())) { 703 if (mSpellChecker == null && createSpellChecker) { 704 mSpellChecker = new SpellChecker(mTextView); 705 } 706 if (mSpellChecker != null) { 707 mSpellChecker.spellCheck(start, end); 708 } 709 } 710 } 711 712 void onScreenStateChanged(int screenState) { 713 switch (screenState) { 714 case View.SCREEN_STATE_ON: 715 resumeBlink(); 716 break; 717 case View.SCREEN_STATE_OFF: 718 suspendBlink(); 719 break; 720 } 721 } 722 723 private void suspendBlink() { 724 if (mBlink != null) { 725 mBlink.cancel(); 726 } 727 } 728 729 private void resumeBlink() { 730 if (mBlink != null) { 731 mBlink.uncancel(); 732 makeBlink(); 733 } 734 } 735 736 void adjustInputType(boolean password, boolean passwordInputType, 737 boolean webPasswordInputType, boolean numberPasswordInputType) { 738 // mInputType has been set from inputType, possibly modified by mInputMethod. 739 // Specialize mInputType to [web]password if we have a text class and the original input 740 // type was a password. 741 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 742 if (password || passwordInputType) { 743 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 744 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 745 } 746 if (webPasswordInputType) { 747 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 748 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 749 } 750 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 751 if (numberPasswordInputType) { 752 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 753 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 754 } 755 } 756 } 757 758 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 759 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 760 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 761 762 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 763 com.android.internal.R.dimen.textview_error_popup_default_width); 764 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 765 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 766 float max = 0; 767 for (int i = 0; i < l.getLineCount(); i++) { 768 max = Math.max(max, l.getLineWidth(i)); 769 } 770 771 /* 772 * Now set the popup size to be big enough for the text plus the border capped 773 * to DEFAULT_MAX_POPUP_WIDTH 774 */ 775 pop.setWidth(wid + (int) Math.ceil(max)); 776 pop.setHeight(ht + l.getHeight()); 777 } 778 779 void setFrame() { 780 if (mErrorPopup != null) { 781 TextView tv = (TextView) mErrorPopup.getContentView(); 782 chooseSize(mErrorPopup, mError, tv); 783 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 784 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 785 } 786 } 787 788 private int getWordStart(int offset) { 789 // FIXME - For this and similar methods we're not doing anything to check if there's 790 // a LocaleSpan in the text, this may be something we should try handling or checking for. 791 int retOffset = getWordIteratorWithText().prevBoundary(offset); 792 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 793 // On punctuation boundary or within group of punctuation, find punctuation start. 794 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 795 } else { 796 // Not on a punctuation boundary, find the word start. 797 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 798 } 799 if (retOffset == BreakIterator.DONE) { 800 return offset; 801 } 802 return retOffset; 803 } 804 805 private int getWordEnd(int offset) { 806 int retOffset = getWordIteratorWithText().nextBoundary(offset); 807 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 808 // On punctuation boundary or within group of punctuation, find punctuation end. 809 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 810 } else { 811 // Not on a punctuation boundary, find the word end. 812 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 813 } 814 if (retOffset == BreakIterator.DONE) { 815 return offset; 816 } 817 return retOffset; 818 } 819 820 private boolean needsToSelectAllToSelectWordOrParagraph() { 821 if (mTextView.hasPasswordTransformationMethod()) { 822 // Always select all on a password field. 823 // Cut/copy menu entries are not available for passwords, but being able to select all 824 // is however useful to delete or paste to replace the entire content. 825 return true; 826 } 827 828 int inputType = mTextView.getInputType(); 829 int klass = inputType & InputType.TYPE_MASK_CLASS; 830 int variation = inputType & InputType.TYPE_MASK_VARIATION; 831 832 // Specific text field types: select the entire text for these 833 if (klass == InputType.TYPE_CLASS_NUMBER 834 || klass == InputType.TYPE_CLASS_PHONE 835 || klass == InputType.TYPE_CLASS_DATETIME 836 || variation == InputType.TYPE_TEXT_VARIATION_URI 837 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 838 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 839 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 840 return true; 841 } 842 return false; 843 } 844 845 /** 846 * Adjusts selection to the word under last touch offset. Return true if the operation was 847 * successfully performed. 848 */ 849 boolean selectCurrentWord() { 850 if (!mTextView.canSelectText()) { 851 return false; 852 } 853 854 if (needsToSelectAllToSelectWordOrParagraph()) { 855 return mTextView.selectAllText(); 856 } 857 858 long lastTouchOffsets = getLastTouchOffsets(); 859 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 860 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 861 862 // Safety check in case standard touch event handling has been bypassed 863 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 864 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 865 866 int selectionStart, selectionEnd; 867 868 // If a URLSpan (web address, email, phone...) is found at that position, select it. 869 URLSpan[] urlSpans = 870 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 871 if (urlSpans.length >= 1) { 872 URLSpan urlSpan = urlSpans[0]; 873 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 874 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 875 } else { 876 // FIXME - We should check if there's a LocaleSpan in the text, this may be 877 // something we should try handling or checking for. 878 final WordIterator wordIterator = getWordIterator(); 879 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 880 881 selectionStart = wordIterator.getBeginning(minOffset); 882 selectionEnd = wordIterator.getEnd(maxOffset); 883 884 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 885 || selectionStart == selectionEnd) { 886 // Possible when the word iterator does not properly handle the text's language 887 long range = getCharClusterRange(minOffset); 888 selectionStart = TextUtils.unpackRangeStartFromLong(range); 889 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 890 } 891 } 892 893 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 894 return selectionEnd > selectionStart; 895 } 896 897 /** 898 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 899 * successfully performed. 900 */ 901 private boolean selectCurrentParagraph() { 902 if (!mTextView.canSelectText()) { 903 return false; 904 } 905 906 if (needsToSelectAllToSelectWordOrParagraph()) { 907 return mTextView.selectAllText(); 908 } 909 910 long lastTouchOffsets = getLastTouchOffsets(); 911 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 912 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 913 914 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 915 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 916 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 917 if (start < end) { 918 Selection.setSelection((Spannable) mTextView.getText(), start, end); 919 return true; 920 } 921 return false; 922 } 923 924 /** 925 * Get the minimum range of paragraphs that contains startOffset and endOffset. 926 */ 927 private long getParagraphsRange(int startOffset, int endOffset) { 928 final Layout layout = mTextView.getLayout(); 929 if (layout == null) { 930 return TextUtils.packRangeInLong(-1, -1); 931 } 932 final CharSequence text = mTextView.getText(); 933 int minLine = layout.getLineForOffset(startOffset); 934 // Search paragraph start. 935 while (minLine > 0) { 936 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 937 if (text.charAt(prevLineEndOffset - 1) == '\n') { 938 break; 939 } 940 minLine--; 941 } 942 int maxLine = layout.getLineForOffset(endOffset); 943 // Search paragraph end. 944 while (maxLine < layout.getLineCount() - 1) { 945 final int lineEndOffset = layout.getLineEnd(maxLine); 946 if (text.charAt(lineEndOffset - 1) == '\n') { 947 break; 948 } 949 maxLine++; 950 } 951 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 952 } 953 954 void onLocaleChanged() { 955 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 956 // proper new locale 957 mWordIterator = null; 958 mWordIteratorWithText = null; 959 } 960 961 public WordIterator getWordIterator() { 962 if (mWordIterator == null) { 963 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 964 } 965 return mWordIterator; 966 } 967 968 private WordIterator getWordIteratorWithText() { 969 if (mWordIteratorWithText == null) { 970 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 971 mUpdateWordIteratorText = true; 972 } 973 if (mUpdateWordIteratorText) { 974 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 975 // to the user's selection is needed. A possible solution would be to 976 // copy some number N of characters near the selection and then when the 977 // user approaches N then we'd do another copy of the next N characters. 978 CharSequence text = mTextView.getText(); 979 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 980 mUpdateWordIteratorText = false; 981 } 982 return mWordIteratorWithText; 983 } 984 985 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 986 final Layout layout = mTextView.getLayout(); 987 if (layout == null) return offset; 988 return findAfterGivenOffset == layout.isRtlCharAt(offset) 989 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 990 } 991 992 private long getCharClusterRange(int offset) { 993 final int textLength = mTextView.getText().length(); 994 if (offset < textLength) { 995 final int clusterEndOffset = getNextCursorOffset(offset, true); 996 return TextUtils.packRangeInLong( 997 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 998 } 999 if (offset - 1 >= 0) { 1000 final int clusterStartOffset = getNextCursorOffset(offset, false); 1001 return TextUtils.packRangeInLong(clusterStartOffset, 1002 getNextCursorOffset(clusterStartOffset, true)); 1003 } 1004 return TextUtils.packRangeInLong(offset, offset); 1005 } 1006 1007 private boolean touchPositionIsInSelection() { 1008 int selectionStart = mTextView.getSelectionStart(); 1009 int selectionEnd = mTextView.getSelectionEnd(); 1010 1011 if (selectionStart == selectionEnd) { 1012 return false; 1013 } 1014 1015 if (selectionStart > selectionEnd) { 1016 int tmp = selectionStart; 1017 selectionStart = selectionEnd; 1018 selectionEnd = tmp; 1019 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1020 } 1021 1022 SelectionModifierCursorController selectionController = getSelectionController(); 1023 int minOffset = selectionController.getMinTouchOffset(); 1024 int maxOffset = selectionController.getMaxTouchOffset(); 1025 1026 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1027 } 1028 1029 private PositionListener getPositionListener() { 1030 if (mPositionListener == null) { 1031 mPositionListener = new PositionListener(); 1032 } 1033 return mPositionListener; 1034 } 1035 1036 private interface TextViewPositionListener { 1037 public void updatePosition(int parentPositionX, int parentPositionY, 1038 boolean parentPositionChanged, boolean parentScrolled); 1039 } 1040 1041 private boolean isOffsetVisible(int offset) { 1042 Layout layout = mTextView.getLayout(); 1043 if (layout == null) return false; 1044 1045 final int line = layout.getLineForOffset(offset); 1046 final int lineBottom = layout.getLineBottom(line); 1047 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1048 return mTextView.isPositionVisible( 1049 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1050 lineBottom + mTextView.viewportToContentVerticalOffset()); 1051 } 1052 1053 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1054 * in the view. Returns false when the position is in the empty space of left/right of text. 1055 */ 1056 private boolean isPositionOnText(float x, float y) { 1057 Layout layout = mTextView.getLayout(); 1058 if (layout == null) return false; 1059 1060 final int line = mTextView.getLineAtCoordinate(y); 1061 x = mTextView.convertToLocalHorizontalCoordinate(x); 1062 1063 if (x < layout.getLineLeft(line)) return false; 1064 if (x > layout.getLineRight(line)) return false; 1065 return true; 1066 } 1067 1068 private void startDragAndDrop() { 1069 getSelectionActionModeHelper().onSelectionDrag(); 1070 1071 // TODO: Fix drag and drop in full screen extracted mode. 1072 if (mTextView.isInExtractedMode()) { 1073 return; 1074 } 1075 final int start = mTextView.getSelectionStart(); 1076 final int end = mTextView.getSelectionEnd(); 1077 CharSequence selectedText = mTextView.getTransformedText(start, end); 1078 ClipData data = ClipData.newPlainText(null, selectedText); 1079 DragLocalState localState = new DragLocalState(mTextView, start, end); 1080 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1081 View.DRAG_FLAG_GLOBAL); 1082 stopTextActionMode(); 1083 if (hasSelectionController()) { 1084 getSelectionController().resetTouchOffsets(); 1085 } 1086 } 1087 1088 public boolean performLongClick(boolean handled) { 1089 // Long press in empty space moves cursor and starts the insertion action mode. 1090 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1091 && mInsertionControllerEnabled) { 1092 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1093 mLastDownPositionY); 1094 Selection.setSelection((Spannable) mTextView.getText(), offset); 1095 getInsertionController().show(); 1096 mIsInsertionActionModeStartPending = true; 1097 handled = true; 1098 MetricsLogger.action( 1099 mTextView.getContext(), 1100 MetricsEvent.TEXT_LONGPRESS, 1101 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1102 } 1103 1104 if (!handled && mTextActionMode != null) { 1105 if (touchPositionIsInSelection()) { 1106 startDragAndDrop(); 1107 MetricsLogger.action( 1108 mTextView.getContext(), 1109 MetricsEvent.TEXT_LONGPRESS, 1110 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1111 } else { 1112 stopTextActionMode(); 1113 selectCurrentWordAndStartDrag(); 1114 MetricsLogger.action( 1115 mTextView.getContext(), 1116 MetricsEvent.TEXT_LONGPRESS, 1117 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1118 } 1119 handled = true; 1120 } 1121 1122 // Start a new selection 1123 if (!handled) { 1124 handled = selectCurrentWordAndStartDrag(); 1125 if (handled) { 1126 MetricsLogger.action( 1127 mTextView.getContext(), 1128 MetricsEvent.TEXT_LONGPRESS, 1129 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1130 } 1131 } 1132 1133 return handled; 1134 } 1135 1136 private long getLastTouchOffsets() { 1137 SelectionModifierCursorController selectionController = getSelectionController(); 1138 final int minOffset = selectionController.getMinTouchOffset(); 1139 final int maxOffset = selectionController.getMaxTouchOffset(); 1140 return TextUtils.packRangeInLong(minOffset, maxOffset); 1141 } 1142 1143 void onFocusChanged(boolean focused, int direction) { 1144 mShowCursor = SystemClock.uptimeMillis(); 1145 ensureEndedBatchEdit(); 1146 1147 if (focused) { 1148 int selStart = mTextView.getSelectionStart(); 1149 int selEnd = mTextView.getSelectionEnd(); 1150 1151 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1152 // mode for these, unless there was a specific selection already started. 1153 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1154 && selEnd == mTextView.getText().length(); 1155 1156 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1157 && !isFocusHighlighted; 1158 1159 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1160 // If a tap was used to give focus to that view, move cursor at tap position. 1161 // Has to be done before onTakeFocus, which can be overloaded. 1162 final int lastTapPosition = getLastTapPosition(); 1163 if (lastTapPosition >= 0) { 1164 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1165 } 1166 1167 // Note this may have to be moved out of the Editor class 1168 MovementMethod mMovement = mTextView.getMovementMethod(); 1169 if (mMovement != null) { 1170 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1171 } 1172 1173 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1174 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1175 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1176 // This special case ensure that we keep current selection in that case. 1177 // It would be better to know why the DecorView does not have focus at that time. 1178 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1179 && selStart >= 0 && selEnd >= 0) { 1180 /* 1181 * Someone intentionally set the selection, so let them 1182 * do whatever it is that they wanted to do instead of 1183 * the default on-focus behavior. We reset the selection 1184 * here instead of just skipping the onTakeFocus() call 1185 * because some movement methods do something other than 1186 * just setting the selection in theirs and we still 1187 * need to go through that path. 1188 */ 1189 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1190 } 1191 1192 if (mSelectAllOnFocus) { 1193 mTextView.selectAllText(); 1194 } 1195 1196 mTouchFocusSelected = true; 1197 } 1198 1199 mFrozenWithFocus = false; 1200 mSelectionMoved = false; 1201 1202 if (mError != null) { 1203 showError(); 1204 } 1205 1206 makeBlink(); 1207 } else { 1208 if (mError != null) { 1209 hideError(); 1210 } 1211 // Don't leave us in the middle of a batch edit. 1212 mTextView.onEndBatchEdit(); 1213 1214 if (mTextView.isInExtractedMode()) { 1215 hideCursorAndSpanControllers(); 1216 stopTextActionModeWithPreservingSelection(); 1217 } else { 1218 hideCursorAndSpanControllers(); 1219 if (mTextView.isTemporarilyDetached()) { 1220 stopTextActionModeWithPreservingSelection(); 1221 } else { 1222 stopTextActionMode(); 1223 } 1224 downgradeEasyCorrectionSpans(); 1225 } 1226 // No need to create the controller 1227 if (mSelectionModifierCursorController != null) { 1228 mSelectionModifierCursorController.resetTouchOffsets(); 1229 } 1230 } 1231 } 1232 1233 /** 1234 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1235 * span. 1236 */ 1237 private void downgradeEasyCorrectionSpans() { 1238 CharSequence text = mTextView.getText(); 1239 if (text instanceof Spannable) { 1240 Spannable spannable = (Spannable) text; 1241 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1242 spannable.length(), SuggestionSpan.class); 1243 for (int i = 0; i < suggestionSpans.length; i++) { 1244 int flags = suggestionSpans[i].getFlags(); 1245 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1246 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1247 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1248 suggestionSpans[i].setFlags(flags); 1249 } 1250 } 1251 } 1252 } 1253 1254 void sendOnTextChanged(int start, int after) { 1255 updateSpellCheckSpans(start, start + after, false); 1256 1257 // Flip flag to indicate the word iterator needs to have the text reset. 1258 mUpdateWordIteratorText = true; 1259 1260 // Hide the controllers as soon as text is modified (typing, procedural...) 1261 // We do not hide the span controllers, since they can be added when a new text is 1262 // inserted into the text view (voice IME). 1263 hideCursorControllers(); 1264 // Reset drag accelerator. 1265 if (mSelectionModifierCursorController != null) { 1266 mSelectionModifierCursorController.resetTouchOffsets(); 1267 } 1268 stopTextActionMode(); 1269 } 1270 1271 private int getLastTapPosition() { 1272 // No need to create the controller at that point, no last tap position saved 1273 if (mSelectionModifierCursorController != null) { 1274 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1275 if (lastTapPosition >= 0) { 1276 // Safety check, should not be possible. 1277 if (lastTapPosition > mTextView.getText().length()) { 1278 lastTapPosition = mTextView.getText().length(); 1279 } 1280 return lastTapPosition; 1281 } 1282 } 1283 1284 return -1; 1285 } 1286 1287 void onWindowFocusChanged(boolean hasWindowFocus) { 1288 if (hasWindowFocus) { 1289 if (mBlink != null) { 1290 mBlink.uncancel(); 1291 makeBlink(); 1292 } 1293 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1294 refreshTextActionMode(); 1295 } 1296 } else { 1297 if (mBlink != null) { 1298 mBlink.cancel(); 1299 } 1300 if (mInputContentType != null) { 1301 mInputContentType.enterDown = false; 1302 } 1303 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1304 hideCursorAndSpanControllers(); 1305 stopTextActionModeWithPreservingSelection(); 1306 if (mSuggestionsPopupWindow != null) { 1307 mSuggestionsPopupWindow.onParentLostFocus(); 1308 } 1309 1310 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1311 ensureEndedBatchEdit(); 1312 } 1313 } 1314 1315 private void updateTapState(MotionEvent event) { 1316 final int action = event.getActionMasked(); 1317 if (action == MotionEvent.ACTION_DOWN) { 1318 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1319 // Detect double tap and triple click. 1320 if (((mTapState == TAP_STATE_FIRST_TAP) 1321 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1322 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1323 <= ViewConfiguration.getDoubleTapTimeout()) { 1324 if (mTapState == TAP_STATE_FIRST_TAP) { 1325 mTapState = TAP_STATE_DOUBLE_TAP; 1326 } else { 1327 mTapState = TAP_STATE_TRIPLE_CLICK; 1328 } 1329 } else { 1330 mTapState = TAP_STATE_FIRST_TAP; 1331 } 1332 } 1333 if (action == MotionEvent.ACTION_UP) { 1334 mLastTouchUpTime = SystemClock.uptimeMillis(); 1335 } 1336 } 1337 1338 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1339 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1340 return false; 1341 } 1342 final boolean primaryButtonStateChanged = 1343 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1344 final int action = event.getActionMasked(); 1345 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1346 && !primaryButtonStateChanged) { 1347 return true; 1348 } 1349 if (action == MotionEvent.ACTION_MOVE 1350 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1351 return true; 1352 } 1353 return false; 1354 } 1355 1356 void onTouchEvent(MotionEvent event) { 1357 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1358 mLastButtonState = event.getButtonState(); 1359 if (filterOutEvent) { 1360 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1361 mDiscardNextActionUp = true; 1362 } 1363 return; 1364 } 1365 updateTapState(event); 1366 updateFloatingToolbarVisibility(event); 1367 1368 if (hasSelectionController()) { 1369 getSelectionController().onTouchEvent(event); 1370 } 1371 1372 if (mShowSuggestionRunnable != null) { 1373 mTextView.removeCallbacks(mShowSuggestionRunnable); 1374 mShowSuggestionRunnable = null; 1375 } 1376 1377 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1378 mLastDownPositionX = event.getX(); 1379 mLastDownPositionY = event.getY(); 1380 1381 // Reset this state; it will be re-set if super.onTouchEvent 1382 // causes focus to move to the view. 1383 mTouchFocusSelected = false; 1384 mIgnoreActionUpEvent = false; 1385 } 1386 } 1387 1388 private void updateFloatingToolbarVisibility(MotionEvent event) { 1389 if (mTextActionMode != null) { 1390 switch (event.getActionMasked()) { 1391 case MotionEvent.ACTION_MOVE: 1392 hideFloatingToolbar(ActionMode.DEFAULT_HIDE_DURATION); 1393 break; 1394 case MotionEvent.ACTION_UP: // fall through 1395 case MotionEvent.ACTION_CANCEL: 1396 showFloatingToolbar(); 1397 } 1398 } 1399 } 1400 1401 void hideFloatingToolbar(int duration) { 1402 if (mTextActionMode != null) { 1403 mTextView.removeCallbacks(mShowFloatingToolbar); 1404 mTextActionMode.hide(duration); 1405 } 1406 } 1407 1408 private void showFloatingToolbar() { 1409 if (mTextActionMode != null) { 1410 // Delay "show" so it doesn't interfere with click confirmations 1411 // or double-clicks that could "dismiss" the floating toolbar. 1412 int delay = ViewConfiguration.getDoubleTapTimeout(); 1413 mTextView.postDelayed(mShowFloatingToolbar, delay); 1414 1415 // This classifies the text and most likely returns before the toolbar is actually 1416 // shown. If not, it will update the toolbar with the result when classification 1417 // returns. We would rather not wait for a long running classification process. 1418 invalidateActionModeAsync(); 1419 } 1420 } 1421 1422 public void beginBatchEdit() { 1423 mInBatchEditControllers = true; 1424 final InputMethodState ims = mInputMethodState; 1425 if (ims != null) { 1426 int nesting = ++ims.mBatchEditNesting; 1427 if (nesting == 1) { 1428 ims.mCursorChanged = false; 1429 ims.mChangedDelta = 0; 1430 if (ims.mContentChanged) { 1431 // We already have a pending change from somewhere else, 1432 // so turn this into a full update. 1433 ims.mChangedStart = 0; 1434 ims.mChangedEnd = mTextView.getText().length(); 1435 } else { 1436 ims.mChangedStart = EXTRACT_UNKNOWN; 1437 ims.mChangedEnd = EXTRACT_UNKNOWN; 1438 ims.mContentChanged = false; 1439 } 1440 mUndoInputFilter.beginBatchEdit(); 1441 mTextView.onBeginBatchEdit(); 1442 } 1443 } 1444 } 1445 1446 public void endBatchEdit() { 1447 mInBatchEditControllers = false; 1448 final InputMethodState ims = mInputMethodState; 1449 if (ims != null) { 1450 int nesting = --ims.mBatchEditNesting; 1451 if (nesting == 0) { 1452 finishBatchEdit(ims); 1453 } 1454 } 1455 } 1456 1457 void ensureEndedBatchEdit() { 1458 final InputMethodState ims = mInputMethodState; 1459 if (ims != null && ims.mBatchEditNesting != 0) { 1460 ims.mBatchEditNesting = 0; 1461 finishBatchEdit(ims); 1462 } 1463 } 1464 1465 void finishBatchEdit(final InputMethodState ims) { 1466 mTextView.onEndBatchEdit(); 1467 mUndoInputFilter.endBatchEdit(); 1468 1469 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1470 mTextView.updateAfterEdit(); 1471 reportExtractedText(); 1472 } else if (ims.mCursorChanged) { 1473 // Cheesy way to get us to report the current cursor location. 1474 mTextView.invalidateCursor(); 1475 } 1476 // sendUpdateSelection knows to avoid sending if the selection did 1477 // not actually change. 1478 sendUpdateSelection(); 1479 1480 // Show drag handles if they were blocked by batch edit mode. 1481 if (mTextActionMode != null) { 1482 final CursorController cursorController = mTextView.hasSelection() 1483 ? getSelectionController() : getInsertionController(); 1484 if (cursorController != null && !cursorController.isActive() 1485 && !cursorController.isCursorBeingModified()) { 1486 cursorController.show(); 1487 } 1488 } 1489 } 1490 1491 static final int EXTRACT_NOTHING = -2; 1492 static final int EXTRACT_UNKNOWN = -1; 1493 1494 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1495 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1496 EXTRACT_UNKNOWN, outText); 1497 } 1498 1499 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1500 int partialStartOffset, int partialEndOffset, int delta, 1501 @Nullable ExtractedText outText) { 1502 if (request == null || outText == null) { 1503 return false; 1504 } 1505 1506 final CharSequence content = mTextView.getText(); 1507 if (content == null) { 1508 return false; 1509 } 1510 1511 if (partialStartOffset != EXTRACT_NOTHING) { 1512 final int N = content.length(); 1513 if (partialStartOffset < 0) { 1514 outText.partialStartOffset = outText.partialEndOffset = -1; 1515 partialStartOffset = 0; 1516 partialEndOffset = N; 1517 } else { 1518 // Now use the delta to determine the actual amount of text 1519 // we need. 1520 partialEndOffset += delta; 1521 // Adjust offsets to ensure we contain full spans. 1522 if (content instanceof Spanned) { 1523 Spanned spanned = (Spanned) content; 1524 Object[] spans = spanned.getSpans(partialStartOffset, 1525 partialEndOffset, ParcelableSpan.class); 1526 int i = spans.length; 1527 while (i > 0) { 1528 i--; 1529 int j = spanned.getSpanStart(spans[i]); 1530 if (j < partialStartOffset) partialStartOffset = j; 1531 j = spanned.getSpanEnd(spans[i]); 1532 if (j > partialEndOffset) partialEndOffset = j; 1533 } 1534 } 1535 outText.partialStartOffset = partialStartOffset; 1536 outText.partialEndOffset = partialEndOffset - delta; 1537 1538 if (partialStartOffset > N) { 1539 partialStartOffset = N; 1540 } else if (partialStartOffset < 0) { 1541 partialStartOffset = 0; 1542 } 1543 if (partialEndOffset > N) { 1544 partialEndOffset = N; 1545 } else if (partialEndOffset < 0) { 1546 partialEndOffset = 0; 1547 } 1548 } 1549 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1550 outText.text = content.subSequence(partialStartOffset, 1551 partialEndOffset); 1552 } else { 1553 outText.text = TextUtils.substring(content, partialStartOffset, 1554 partialEndOffset); 1555 } 1556 } else { 1557 outText.partialStartOffset = 0; 1558 outText.partialEndOffset = 0; 1559 outText.text = ""; 1560 } 1561 outText.flags = 0; 1562 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1563 outText.flags |= ExtractedText.FLAG_SELECTING; 1564 } 1565 if (mTextView.isSingleLine()) { 1566 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1567 } 1568 outText.startOffset = 0; 1569 outText.selectionStart = mTextView.getSelectionStart(); 1570 outText.selectionEnd = mTextView.getSelectionEnd(); 1571 return true; 1572 } 1573 1574 boolean reportExtractedText() { 1575 final Editor.InputMethodState ims = mInputMethodState; 1576 if (ims != null) { 1577 final boolean contentChanged = ims.mContentChanged; 1578 if (contentChanged || ims.mSelectionModeChanged) { 1579 ims.mContentChanged = false; 1580 ims.mSelectionModeChanged = false; 1581 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1582 if (req != null) { 1583 InputMethodManager imm = InputMethodManager.peekInstance(); 1584 if (imm != null) { 1585 if (TextView.DEBUG_EXTRACT) { 1586 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1587 + ims.mChangedStart 1588 + " end=" + ims.mChangedEnd 1589 + " delta=" + ims.mChangedDelta); 1590 } 1591 if (ims.mChangedStart < 0 && !contentChanged) { 1592 ims.mChangedStart = EXTRACT_NOTHING; 1593 } 1594 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1595 ims.mChangedDelta, ims.mExtractedText)) { 1596 if (TextView.DEBUG_EXTRACT) { 1597 Log.v(TextView.LOG_TAG, 1598 "Reporting extracted start=" 1599 + ims.mExtractedText.partialStartOffset 1600 + " end=" + ims.mExtractedText.partialEndOffset 1601 + ": " + ims.mExtractedText.text); 1602 } 1603 1604 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1605 ims.mChangedStart = EXTRACT_UNKNOWN; 1606 ims.mChangedEnd = EXTRACT_UNKNOWN; 1607 ims.mChangedDelta = 0; 1608 ims.mContentChanged = false; 1609 return true; 1610 } 1611 } 1612 } 1613 } 1614 } 1615 return false; 1616 } 1617 1618 private void sendUpdateSelection() { 1619 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1620 final InputMethodManager imm = InputMethodManager.peekInstance(); 1621 if (null != imm) { 1622 final int selectionStart = mTextView.getSelectionStart(); 1623 final int selectionEnd = mTextView.getSelectionEnd(); 1624 int candStart = -1; 1625 int candEnd = -1; 1626 if (mTextView.getText() instanceof Spannable) { 1627 final Spannable sp = (Spannable) mTextView.getText(); 1628 candStart = EditableInputConnection.getComposingSpanStart(sp); 1629 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1630 } 1631 // InputMethodManager#updateSelection skips sending the message if 1632 // none of the parameters have changed since the last time we called it. 1633 imm.updateSelection(mTextView, 1634 selectionStart, selectionEnd, candStart, candEnd); 1635 } 1636 } 1637 } 1638 1639 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1640 int cursorOffsetVertical) { 1641 final int selectionStart = mTextView.getSelectionStart(); 1642 final int selectionEnd = mTextView.getSelectionEnd(); 1643 1644 final InputMethodState ims = mInputMethodState; 1645 if (ims != null && ims.mBatchEditNesting == 0) { 1646 InputMethodManager imm = InputMethodManager.peekInstance(); 1647 if (imm != null) { 1648 if (imm.isActive(mTextView)) { 1649 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1650 // We are in extract mode and the content has changed 1651 // in some way... just report complete new text to the 1652 // input method. 1653 reportExtractedText(); 1654 } 1655 } 1656 } 1657 } 1658 1659 if (mCorrectionHighlighter != null) { 1660 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1661 } 1662 1663 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1664 drawCursor(canvas, cursorOffsetVertical); 1665 // Rely on the drawable entirely, do not draw the cursor line. 1666 // Has to be done after the IMM related code above which relies on the highlight. 1667 highlight = null; 1668 } 1669 1670 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1671 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1672 cursorOffsetVertical); 1673 } else { 1674 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1675 } 1676 } 1677 1678 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1679 Paint highlightPaint, int cursorOffsetVertical) { 1680 final long lineRange = layout.getLineRangeForDraw(canvas); 1681 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1682 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1683 if (lastLine < 0) return; 1684 1685 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1686 firstLine, lastLine); 1687 1688 if (layout instanceof DynamicLayout) { 1689 if (mTextRenderNodes == null) { 1690 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1691 } 1692 1693 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1694 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1695 int[] blockIndices = dynamicLayout.getBlockIndices(); 1696 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1697 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1698 1699 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1700 if (blockSet != null) { 1701 for (int i = 0; i < blockSet.size(); i++) { 1702 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1703 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1704 && mTextRenderNodes[blockIndex] != null) { 1705 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1706 } 1707 } 1708 } 1709 1710 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1711 if (startBlock < 0) { 1712 startBlock = -(startBlock + 1); 1713 } 1714 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1715 1716 int startIndexToFindAvailableRenderNode = 0; 1717 int lastIndex = numberOfBlocks; 1718 1719 for (int i = startBlock; i < numberOfBlocks; i++) { 1720 final int blockIndex = blockIndices[i]; 1721 if (i >= indexFirstChangedBlock 1722 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1723 && mTextRenderNodes[blockIndex] != null) { 1724 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1725 } 1726 if (blockEndLines[i] < firstLine) { 1727 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1728 // be redrawn after they get scrolled into drawing range. 1729 continue; 1730 } 1731 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1732 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1733 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1734 if (blockEndLines[i] >= lastLine) { 1735 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1736 break; 1737 } 1738 } 1739 if (blockSet != null) { 1740 for (int i = 0; i < blockSet.size(); i++) { 1741 final int block = blockSet.valueAt(i); 1742 final int blockIndex = dynamicLayout.getBlockIndex(block); 1743 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1744 || mTextRenderNodes[blockIndex] == null 1745 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1746 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1747 layout, highlight, highlightPaint, cursorOffsetVertical, 1748 blockEndLines, blockIndices, block, numberOfBlocks, 1749 startIndexToFindAvailableRenderNode); 1750 } 1751 } 1752 } 1753 1754 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1755 } else { 1756 // Boring layout is used for empty and hint text 1757 layout.drawText(canvas, firstLine, lastLine); 1758 } 1759 } 1760 1761 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1762 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1763 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1764 int startIndexToFindAvailableRenderNode) { 1765 final int blockEndLine = blockEndLines[blockInfoIndex]; 1766 int blockIndex = blockIndices[blockInfoIndex]; 1767 1768 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1769 if (blockIsInvalid) { 1770 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1771 startIndexToFindAvailableRenderNode); 1772 // Note how dynamic layout's internal block indices get updated from Editor 1773 blockIndices[blockInfoIndex] = blockIndex; 1774 if (mTextRenderNodes[blockIndex] != null) { 1775 mTextRenderNodes[blockIndex].isDirty = true; 1776 } 1777 startIndexToFindAvailableRenderNode = blockIndex + 1; 1778 } 1779 1780 if (mTextRenderNodes[blockIndex] == null) { 1781 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1782 } 1783 1784 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1785 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1786 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1787 final int blockBeginLine = blockInfoIndex == 0 ? 1788 0 : blockEndLines[blockInfoIndex - 1] + 1; 1789 final int top = layout.getLineTop(blockBeginLine); 1790 final int bottom = layout.getLineBottom(blockEndLine); 1791 int left = 0; 1792 int right = mTextView.getWidth(); 1793 if (mTextView.getHorizontallyScrolling()) { 1794 float min = Float.MAX_VALUE; 1795 float max = Float.MIN_VALUE; 1796 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1797 min = Math.min(min, layout.getLineLeft(line)); 1798 max = Math.max(max, layout.getLineRight(line)); 1799 } 1800 left = (int) min; 1801 right = (int) (max + 0.5f); 1802 } 1803 1804 // Rebuild display list if it is invalid 1805 if (blockDisplayListIsInvalid) { 1806 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1807 right - left, bottom - top); 1808 try { 1809 // drawText is always relative to TextView's origin, this translation 1810 // brings this range of text back to the top left corner of the viewport 1811 displayListCanvas.translate(-left, -top); 1812 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1813 mTextRenderNodes[blockIndex].isDirty = false; 1814 // No need to untranslate, previous context is popped after 1815 // drawDisplayList 1816 } finally { 1817 blockDisplayList.end(displayListCanvas); 1818 // Same as drawDisplayList below, handled by our TextView's parent 1819 blockDisplayList.setClipToBounds(false); 1820 } 1821 } 1822 1823 // Valid display list only needs to update its drawing location. 1824 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1825 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1826 } 1827 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1828 return startIndexToFindAvailableRenderNode; 1829 } 1830 1831 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1832 int searchStartIndex) { 1833 int length = mTextRenderNodes.length; 1834 for (int i = searchStartIndex; i < length; i++) { 1835 boolean blockIndexFound = false; 1836 for (int j = 0; j < numberOfBlocks; j++) { 1837 if (blockIndices[j] == i) { 1838 blockIndexFound = true; 1839 break; 1840 } 1841 } 1842 if (blockIndexFound) continue; 1843 return i; 1844 } 1845 1846 // No available index found, the pool has to grow 1847 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1848 return length; 1849 } 1850 1851 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1852 final boolean translate = cursorOffsetVertical != 0; 1853 if (translate) canvas.translate(0, cursorOffsetVertical); 1854 for (int i = 0; i < mCursorCount; i++) { 1855 mCursorDrawable[i].draw(canvas); 1856 } 1857 if (translate) canvas.translate(0, -cursorOffsetVertical); 1858 } 1859 1860 void invalidateHandlesAndActionMode() { 1861 if (mSelectionModifierCursorController != null) { 1862 mSelectionModifierCursorController.invalidateHandles(); 1863 } 1864 if (mInsertionPointCursorController != null) { 1865 mInsertionPointCursorController.invalidateHandle(); 1866 } 1867 if (mTextActionMode != null) { 1868 invalidateActionMode(); 1869 } 1870 } 1871 1872 /** 1873 * Invalidates all the sub-display lists that overlap the specified character range 1874 */ 1875 void invalidateTextDisplayList(Layout layout, int start, int end) { 1876 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1877 final int firstLine = layout.getLineForOffset(start); 1878 final int lastLine = layout.getLineForOffset(end); 1879 1880 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1881 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1882 int[] blockIndices = dynamicLayout.getBlockIndices(); 1883 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1884 1885 int i = 0; 1886 // Skip the blocks before firstLine 1887 while (i < numberOfBlocks) { 1888 if (blockEndLines[i] >= firstLine) break; 1889 i++; 1890 } 1891 1892 // Invalidate all subsequent blocks until lastLine is passed 1893 while (i < numberOfBlocks) { 1894 final int blockIndex = blockIndices[i]; 1895 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1896 mTextRenderNodes[blockIndex].isDirty = true; 1897 } 1898 if (blockEndLines[i] >= lastLine) break; 1899 i++; 1900 } 1901 } 1902 } 1903 1904 void invalidateTextDisplayList() { 1905 if (mTextRenderNodes != null) { 1906 for (int i = 0; i < mTextRenderNodes.length; i++) { 1907 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1908 } 1909 } 1910 } 1911 1912 void updateCursorsPositions() { 1913 if (mTextView.mCursorDrawableRes == 0) { 1914 mCursorCount = 0; 1915 return; 1916 } 1917 1918 Layout layout = mTextView.getLayout(); 1919 final int offset = mTextView.getSelectionStart(); 1920 final int line = layout.getLineForOffset(offset); 1921 final int top = layout.getLineTop(line); 1922 final int bottom = layout.getLineTop(line + 1); 1923 1924 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1925 1926 int middle = bottom; 1927 if (mCursorCount == 2) { 1928 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1929 middle = (top + bottom) >> 1; 1930 } 1931 1932 boolean clamped = layout.shouldClampCursor(line); 1933 updateCursorPosition(0, top, middle, layout.getPrimaryHorizontal(offset, clamped)); 1934 1935 if (mCursorCount == 2) { 1936 updateCursorPosition(1, middle, bottom, layout.getSecondaryHorizontal(offset, clamped)); 1937 } 1938 } 1939 1940 void refreshTextActionMode() { 1941 if (extractedTextModeWillBeStarted()) { 1942 mRestartActionModeOnNextRefresh = false; 1943 return; 1944 } 1945 final boolean hasSelection = mTextView.hasSelection(); 1946 final SelectionModifierCursorController selectionController = getSelectionController(); 1947 final InsertionPointCursorController insertionController = getInsertionController(); 1948 if ((selectionController != null && selectionController.isCursorBeingModified()) 1949 || (insertionController != null && insertionController.isCursorBeingModified())) { 1950 // ActionMode should be managed by the currently active cursor controller. 1951 mRestartActionModeOnNextRefresh = false; 1952 return; 1953 } 1954 if (hasSelection) { 1955 hideInsertionPointCursorController(); 1956 if (mTextActionMode == null) { 1957 if (mRestartActionModeOnNextRefresh) { 1958 // To avoid distraction, newly start action mode only when selection action 1959 // mode is being restarted. 1960 startSelectionActionModeAsync(false); 1961 } 1962 } else if (selectionController == null || !selectionController.isActive()) { 1963 // Insertion action mode is active. Avoid dismissing the selection. 1964 stopTextActionModeWithPreservingSelection(); 1965 startSelectionActionModeAsync(false); 1966 } else { 1967 mTextActionMode.invalidateContentRect(); 1968 } 1969 } else { 1970 // Insertion action mode is started only when insertion controller is explicitly 1971 // activated. 1972 if (insertionController == null || !insertionController.isActive()) { 1973 stopTextActionMode(); 1974 } else if (mTextActionMode != null) { 1975 mTextActionMode.invalidateContentRect(); 1976 } 1977 } 1978 mRestartActionModeOnNextRefresh = false; 1979 } 1980 1981 /** 1982 * Start an Insertion action mode. 1983 */ 1984 void startInsertionActionMode() { 1985 if (mInsertionActionModeRunnable != null) { 1986 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1987 } 1988 if (extractedTextModeWillBeStarted()) { 1989 return; 1990 } 1991 stopTextActionMode(); 1992 1993 ActionMode.Callback actionModeCallback = 1994 new TextActionModeCallback(false /* hasSelection */); 1995 mTextActionMode = mTextView.startActionMode( 1996 actionModeCallback, ActionMode.TYPE_FLOATING); 1997 if (mTextActionMode != null && getInsertionController() != null) { 1998 getInsertionController().show(); 1999 } 2000 } 2001 2002 @NonNull 2003 TextView getTextView() { 2004 return mTextView; 2005 } 2006 2007 @Nullable 2008 ActionMode getTextActionMode() { 2009 return mTextActionMode; 2010 } 2011 2012 void setRestartActionModeOnNextRefresh(boolean value) { 2013 mRestartActionModeOnNextRefresh = value; 2014 } 2015 2016 /** 2017 * Asynchronously starts a selection action mode using the TextClassifier. 2018 */ 2019 void startSelectionActionModeAsync(boolean adjustSelection) { 2020 getSelectionActionModeHelper().startActionModeAsync(adjustSelection); 2021 } 2022 2023 /** 2024 * Asynchronously invalidates an action mode using the TextClassifier. 2025 */ 2026 void invalidateActionModeAsync() { 2027 getSelectionActionModeHelper().invalidateActionModeAsync(); 2028 } 2029 2030 /** 2031 * Synchronously invalidates an action mode without the TextClassifier. 2032 */ 2033 private void invalidateActionMode() { 2034 if (mTextActionMode != null) { 2035 mTextActionMode.invalidate(); 2036 } 2037 } 2038 2039 private SelectionActionModeHelper getSelectionActionModeHelper() { 2040 if (mSelectionActionModeHelper == null) { 2041 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2042 } 2043 return mSelectionActionModeHelper; 2044 } 2045 2046 /** 2047 * If the TextView allows text selection, selects the current word when no existing selection 2048 * was available and starts a drag. 2049 * 2050 * @return true if the drag was started. 2051 */ 2052 private boolean selectCurrentWordAndStartDrag() { 2053 if (mInsertionActionModeRunnable != null) { 2054 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2055 } 2056 if (extractedTextModeWillBeStarted()) { 2057 return false; 2058 } 2059 if (!checkField()) { 2060 return false; 2061 } 2062 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2063 // No selection and cannot select a word. 2064 return false; 2065 } 2066 stopTextActionModeWithPreservingSelection(); 2067 getSelectionController().enterDrag( 2068 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2069 return true; 2070 } 2071 2072 /** 2073 * Checks whether a selection can be performed on the current TextView. 2074 * 2075 * @return true if a selection can be performed 2076 */ 2077 boolean checkField() { 2078 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2079 Log.w(TextView.LOG_TAG, 2080 "TextView does not support text selection. Selection cancelled."); 2081 return false; 2082 } 2083 return true; 2084 } 2085 2086 boolean startSelectionActionModeInternal() { 2087 if (extractedTextModeWillBeStarted()) { 2088 return false; 2089 } 2090 if (mTextActionMode != null) { 2091 // Text action mode is already started 2092 invalidateActionMode(); 2093 return false; 2094 } 2095 2096 if (!checkField() || !mTextView.hasSelection()) { 2097 return false; 2098 } 2099 2100 ActionMode.Callback actionModeCallback = 2101 new TextActionModeCallback(true /* hasSelection */); 2102 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2103 2104 final boolean selectionStarted = mTextActionMode != null; 2105 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2106 // Show the IME to be able to replace text, except when selecting non editable text. 2107 final InputMethodManager imm = InputMethodManager.peekInstance(); 2108 if (imm != null) { 2109 imm.showSoftInput(mTextView, 0, null); 2110 } 2111 } 2112 return selectionStarted; 2113 } 2114 2115 private boolean extractedTextModeWillBeStarted() { 2116 if (!(mTextView.isInExtractedMode())) { 2117 final InputMethodManager imm = InputMethodManager.peekInstance(); 2118 return imm != null && imm.isFullscreenMode(); 2119 } 2120 return false; 2121 } 2122 2123 /** 2124 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2125 * the current cursor position or selection range. This method is consistent with the 2126 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2127 */ 2128 private boolean shouldOfferToShowSuggestions() { 2129 CharSequence text = mTextView.getText(); 2130 if (!(text instanceof Spannable)) return false; 2131 2132 final Spannable spannable = (Spannable) text; 2133 final int selectionStart = mTextView.getSelectionStart(); 2134 final int selectionEnd = mTextView.getSelectionEnd(); 2135 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2136 SuggestionSpan.class); 2137 if (suggestionSpans.length == 0) { 2138 return false; 2139 } 2140 if (selectionStart == selectionEnd) { 2141 // Spans overlap the cursor. 2142 for (int i = 0; i < suggestionSpans.length; i++) { 2143 if (suggestionSpans[i].getSuggestions().length > 0) { 2144 return true; 2145 } 2146 } 2147 return false; 2148 } 2149 int minSpanStart = mTextView.getText().length(); 2150 int maxSpanEnd = 0; 2151 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2152 int unionOfSpansCoveringSelectionStartEnd = 0; 2153 boolean hasValidSuggestions = false; 2154 for (int i = 0; i < suggestionSpans.length; i++) { 2155 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2156 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2157 minSpanStart = Math.min(minSpanStart, spanStart); 2158 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2159 if (selectionStart < spanStart || selectionStart > spanEnd) { 2160 // The span doesn't cover the current selection start point. 2161 continue; 2162 } 2163 hasValidSuggestions = 2164 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2165 unionOfSpansCoveringSelectionStartStart = 2166 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2167 unionOfSpansCoveringSelectionStartEnd = 2168 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2169 } 2170 if (!hasValidSuggestions) { 2171 return false; 2172 } 2173 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2174 // No spans cover the selection start point. 2175 return false; 2176 } 2177 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2178 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2179 // There is a span that is not covered by the union. In this case, we soouldn't offer 2180 // to show suggestions as it's confusing. 2181 return false; 2182 } 2183 return true; 2184 } 2185 2186 /** 2187 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2188 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2189 */ 2190 private boolean isCursorInsideEasyCorrectionSpan() { 2191 Spannable spannable = (Spannable) mTextView.getText(); 2192 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2193 mTextView.getSelectionEnd(), SuggestionSpan.class); 2194 for (int i = 0; i < suggestionSpans.length; i++) { 2195 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2196 return true; 2197 } 2198 } 2199 return false; 2200 } 2201 2202 void onTouchUpEvent(MotionEvent event) { 2203 if (getSelectionActionModeHelper().resetSelection( 2204 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2205 return; 2206 } 2207 2208 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2209 hideCursorAndSpanControllers(); 2210 stopTextActionMode(); 2211 CharSequence text = mTextView.getText(); 2212 if (!selectAllGotFocus && text.length() > 0) { 2213 // Move cursor 2214 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2215 Selection.setSelection((Spannable) text, offset); 2216 if (mSpellChecker != null) { 2217 // When the cursor moves, the word that was typed may need spell check 2218 mSpellChecker.onSelectionChanged(); 2219 } 2220 2221 if (!extractedTextModeWillBeStarted()) { 2222 if (isCursorInsideEasyCorrectionSpan()) { 2223 // Cancel the single tap delayed runnable. 2224 if (mInsertionActionModeRunnable != null) { 2225 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2226 } 2227 2228 mShowSuggestionRunnable = new Runnable() { 2229 public void run() { 2230 replace(); 2231 } 2232 }; 2233 // removeCallbacks is performed on every touch 2234 mTextView.postDelayed(mShowSuggestionRunnable, 2235 ViewConfiguration.getDoubleTapTimeout()); 2236 } else if (hasInsertionController()) { 2237 getInsertionController().show(); 2238 } 2239 } 2240 } 2241 } 2242 2243 protected void stopTextActionMode() { 2244 if (mTextActionMode != null) { 2245 // This will hide the mSelectionModifierCursorController 2246 mTextActionMode.finish(); 2247 } 2248 } 2249 2250 private void stopTextActionModeWithPreservingSelection() { 2251 if (mTextActionMode != null) { 2252 mRestartActionModeOnNextRefresh = true; 2253 } 2254 mPreserveSelection = true; 2255 stopTextActionMode(); 2256 mPreserveSelection = false; 2257 } 2258 2259 /** 2260 * @return True if this view supports insertion handles. 2261 */ 2262 boolean hasInsertionController() { 2263 return mInsertionControllerEnabled; 2264 } 2265 2266 /** 2267 * @return True if this view supports selection handles. 2268 */ 2269 boolean hasSelectionController() { 2270 return mSelectionControllerEnabled; 2271 } 2272 2273 private InsertionPointCursorController getInsertionController() { 2274 if (!mInsertionControllerEnabled) { 2275 return null; 2276 } 2277 2278 if (mInsertionPointCursorController == null) { 2279 mInsertionPointCursorController = new InsertionPointCursorController(); 2280 2281 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2282 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2283 } 2284 2285 return mInsertionPointCursorController; 2286 } 2287 2288 @Nullable 2289 SelectionModifierCursorController getSelectionController() { 2290 if (!mSelectionControllerEnabled) { 2291 return null; 2292 } 2293 2294 if (mSelectionModifierCursorController == null) { 2295 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2296 2297 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2298 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2299 } 2300 2301 return mSelectionModifierCursorController; 2302 } 2303 2304 @VisibleForTesting 2305 public Drawable[] getCursorDrawable() { 2306 return mCursorDrawable; 2307 } 2308 2309 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2310 if (mCursorDrawable[cursorIndex] == null) { 2311 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2312 mTextView.mCursorDrawableRes); 2313 } 2314 final Drawable drawable = mCursorDrawable[cursorIndex]; 2315 final int left = clampHorizontalPosition(drawable, horizontal); 2316 final int width = drawable.getIntrinsicWidth(); 2317 drawable.setBounds(left, top - mTempRect.top, left + width, 2318 bottom + mTempRect.bottom); 2319 } 2320 2321 /** 2322 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2323 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2324 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2325 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2326 * of the view. 2327 * 2328 * @param drawable Drawable. Can be null. 2329 * @param horizontal Horizontal position for the drawable. 2330 * @return The clamped horizontal position for the drawable. 2331 */ 2332 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2333 horizontal = Math.max(0.5f, horizontal - 0.5f); 2334 if (mTempRect == null) mTempRect = new Rect(); 2335 2336 int drawableWidth = 0; 2337 if (drawable != null) { 2338 drawable.getPadding(mTempRect); 2339 drawableWidth = drawable.getIntrinsicWidth(); 2340 } else { 2341 mTempRect.setEmpty(); 2342 } 2343 2344 int scrollX = mTextView.getScrollX(); 2345 float horizontalDiff = horizontal - scrollX; 2346 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2347 - mTextView.getCompoundPaddingRight(); 2348 2349 final int left; 2350 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2351 // at the rightmost position 2352 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2353 } else if (Math.abs(horizontalDiff) <= 1f 2354 || (TextUtils.isEmpty(mTextView.getText()) 2355 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2356 && horizontal <= 1f)) { 2357 // at the leftmost position 2358 left = scrollX - mTempRect.left; 2359 } else { 2360 left = (int) horizontal - mTempRect.left; 2361 } 2362 return left; 2363 } 2364 2365 /** 2366 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2367 * a dictionary) from the current input method, provided by it calling 2368 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2369 * implementation flashes the background of the corrected word to provide feedback to the user. 2370 * 2371 * @param info The auto correct info about the text that was corrected. 2372 */ 2373 public void onCommitCorrection(CorrectionInfo info) { 2374 if (mCorrectionHighlighter == null) { 2375 mCorrectionHighlighter = new CorrectionHighlighter(); 2376 } else { 2377 mCorrectionHighlighter.invalidate(false); 2378 } 2379 2380 mCorrectionHighlighter.highlight(info); 2381 mUndoInputFilter.freezeLastEdit(); 2382 } 2383 2384 void onScrollChanged() { 2385 if (mPositionListener != null) { 2386 mPositionListener.onScrollChanged(); 2387 } 2388 if (mTextActionMode != null) { 2389 mTextActionMode.invalidateContentRect(); 2390 } 2391 } 2392 2393 /** 2394 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2395 */ 2396 private boolean shouldBlink() { 2397 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2398 2399 final int start = mTextView.getSelectionStart(); 2400 if (start < 0) return false; 2401 2402 final int end = mTextView.getSelectionEnd(); 2403 if (end < 0) return false; 2404 2405 return start == end; 2406 } 2407 2408 void makeBlink() { 2409 if (shouldBlink()) { 2410 mShowCursor = SystemClock.uptimeMillis(); 2411 if (mBlink == null) mBlink = new Blink(); 2412 mTextView.removeCallbacks(mBlink); 2413 mTextView.postDelayed(mBlink, BLINK); 2414 } else { 2415 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2416 } 2417 } 2418 2419 private class Blink implements Runnable { 2420 private boolean mCancelled; 2421 2422 public void run() { 2423 if (mCancelled) { 2424 return; 2425 } 2426 2427 mTextView.removeCallbacks(this); 2428 2429 if (shouldBlink()) { 2430 if (mTextView.getLayout() != null) { 2431 mTextView.invalidateCursorPath(); 2432 } 2433 2434 mTextView.postDelayed(this, BLINK); 2435 } 2436 } 2437 2438 void cancel() { 2439 if (!mCancelled) { 2440 mTextView.removeCallbacks(this); 2441 mCancelled = true; 2442 } 2443 } 2444 2445 void uncancel() { 2446 mCancelled = false; 2447 } 2448 } 2449 2450 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2451 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2452 com.android.internal.R.layout.text_drag_thumbnail, null); 2453 2454 if (shadowView == null) { 2455 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2456 } 2457 2458 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2459 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2460 end = TextUtils.unpackRangeEndFromLong(range); 2461 } 2462 final CharSequence text = mTextView.getTransformedText(start, end); 2463 shadowView.setText(text); 2464 shadowView.setTextColor(mTextView.getTextColors()); 2465 2466 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2467 shadowView.setGravity(Gravity.CENTER); 2468 2469 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2470 ViewGroup.LayoutParams.WRAP_CONTENT)); 2471 2472 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2473 shadowView.measure(size, size); 2474 2475 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2476 shadowView.invalidate(); 2477 return new DragShadowBuilder(shadowView); 2478 } 2479 2480 private static class DragLocalState { 2481 public TextView sourceTextView; 2482 public int start, end; 2483 2484 public DragLocalState(TextView sourceTextView, int start, int end) { 2485 this.sourceTextView = sourceTextView; 2486 this.start = start; 2487 this.end = end; 2488 } 2489 } 2490 2491 void onDrop(DragEvent event) { 2492 SpannableStringBuilder content = new SpannableStringBuilder(); 2493 2494 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2495 if (permissions != null) { 2496 permissions.takeTransient(); 2497 } 2498 2499 try { 2500 ClipData clipData = event.getClipData(); 2501 final int itemCount = clipData.getItemCount(); 2502 for (int i = 0; i < itemCount; i++) { 2503 Item item = clipData.getItemAt(i); 2504 content.append(item.coerceToStyledText(mTextView.getContext())); 2505 } 2506 } finally { 2507 if (permissions != null) { 2508 permissions.release(); 2509 } 2510 } 2511 2512 mTextView.beginBatchEdit(); 2513 mUndoInputFilter.freezeLastEdit(); 2514 try { 2515 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2516 Object localState = event.getLocalState(); 2517 DragLocalState dragLocalState = null; 2518 if (localState instanceof DragLocalState) { 2519 dragLocalState = (DragLocalState) localState; 2520 } 2521 boolean dragDropIntoItself = dragLocalState != null 2522 && dragLocalState.sourceTextView == mTextView; 2523 2524 if (dragDropIntoItself) { 2525 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2526 // A drop inside the original selection discards the drop. 2527 return; 2528 } 2529 } 2530 2531 final int originalLength = mTextView.getText().length(); 2532 int min = offset; 2533 int max = offset; 2534 2535 Selection.setSelection((Spannable) mTextView.getText(), max); 2536 mTextView.replaceText_internal(min, max, content); 2537 2538 if (dragDropIntoItself) { 2539 int dragSourceStart = dragLocalState.start; 2540 int dragSourceEnd = dragLocalState.end; 2541 if (max <= dragSourceStart) { 2542 // Inserting text before selection has shifted positions 2543 final int shift = mTextView.getText().length() - originalLength; 2544 dragSourceStart += shift; 2545 dragSourceEnd += shift; 2546 } 2547 2548 // Delete original selection 2549 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2550 2551 // Make sure we do not leave two adjacent spaces. 2552 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2553 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2554 if (nextCharIdx > prevCharIdx + 1) { 2555 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2556 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2557 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2558 } 2559 } 2560 } 2561 } finally { 2562 mTextView.endBatchEdit(); 2563 mUndoInputFilter.freezeLastEdit(); 2564 } 2565 } 2566 2567 public void addSpanWatchers(Spannable text) { 2568 final int textLength = text.length(); 2569 2570 if (mKeyListener != null) { 2571 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2572 } 2573 2574 if (mSpanController == null) { 2575 mSpanController = new SpanController(); 2576 } 2577 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2578 } 2579 2580 void setContextMenuAnchor(float x, float y) { 2581 mContextMenuAnchorX = x; 2582 mContextMenuAnchorY = y; 2583 } 2584 2585 void onCreateContextMenu(ContextMenu menu) { 2586 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2587 || Float.isNaN(mContextMenuAnchorY)) { 2588 return; 2589 } 2590 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2591 if (offset == -1) { 2592 return; 2593 } 2594 2595 stopTextActionModeWithPreservingSelection(); 2596 if (mTextView.canSelectText()) { 2597 final boolean isOnSelection = mTextView.hasSelection() 2598 && offset >= mTextView.getSelectionStart() 2599 && offset <= mTextView.getSelectionEnd(); 2600 if (!isOnSelection) { 2601 // Right clicked position is not on the selection. Remove the selection and move the 2602 // cursor to the right clicked position. 2603 Selection.setSelection((Spannable) mTextView.getText(), offset); 2604 stopTextActionMode(); 2605 } 2606 } 2607 2608 if (shouldOfferToShowSuggestions()) { 2609 final SuggestionInfo[] suggestionInfoArray = 2610 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2611 for (int i = 0; i < suggestionInfoArray.length; i++) { 2612 suggestionInfoArray[i] = new SuggestionInfo(); 2613 } 2614 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2615 com.android.internal.R.string.replace); 2616 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2617 for (int i = 0; i < numItems; i++) { 2618 final SuggestionInfo info = suggestionInfoArray[i]; 2619 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2620 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2621 @Override 2622 public boolean onMenuItemClick(MenuItem item) { 2623 replaceWithSuggestion(info); 2624 return true; 2625 } 2626 }); 2627 } 2628 } 2629 2630 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2631 com.android.internal.R.string.undo) 2632 .setAlphabeticShortcut('z') 2633 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2634 .setEnabled(mTextView.canUndo()); 2635 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2636 com.android.internal.R.string.redo) 2637 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2638 .setEnabled(mTextView.canRedo()); 2639 2640 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2641 com.android.internal.R.string.cut) 2642 .setAlphabeticShortcut('x') 2643 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2644 .setEnabled(mTextView.canCut()); 2645 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2646 com.android.internal.R.string.copy) 2647 .setAlphabeticShortcut('c') 2648 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2649 .setEnabled(mTextView.canCopy()); 2650 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2651 com.android.internal.R.string.paste) 2652 .setAlphabeticShortcut('v') 2653 .setEnabled(mTextView.canPaste()) 2654 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2655 menu.add(Menu.NONE, TextView.ID_PASTE_AS_PLAIN_TEXT, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2656 com.android.internal.R.string.paste_as_plain_text) 2657 .setEnabled(mTextView.canPasteAsPlainText()) 2658 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2659 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2660 com.android.internal.R.string.share) 2661 .setEnabled(mTextView.canShare()) 2662 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2663 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2664 com.android.internal.R.string.selectAll) 2665 .setAlphabeticShortcut('a') 2666 .setEnabled(mTextView.canSelectAllText()) 2667 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2668 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2669 android.R.string.autofill) 2670 .setEnabled(mTextView.canRequestAutofill()) 2671 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2672 2673 mPreserveSelection = true; 2674 } 2675 2676 @Nullable 2677 private SuggestionSpan findEquivalentSuggestionSpan( 2678 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2679 final Editable editable = (Editable) mTextView.getText(); 2680 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2681 // Exactly same span is found. 2682 return suggestionSpanInfo.mSuggestionSpan; 2683 } 2684 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2685 // contents. 2686 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2687 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2688 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2689 final int start = editable.getSpanStart(suggestionSpan); 2690 if (start != suggestionSpanInfo.mSpanStart) { 2691 continue; 2692 } 2693 final int end = editable.getSpanEnd(suggestionSpan); 2694 if (end != suggestionSpanInfo.mSpanEnd) { 2695 continue; 2696 } 2697 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2698 return suggestionSpan; 2699 } 2700 } 2701 return null; 2702 } 2703 2704 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2705 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2706 suggestionInfo.mSuggestionSpanInfo); 2707 if (targetSuggestionSpan == null) { 2708 // Span has been removed 2709 return; 2710 } 2711 final Editable editable = (Editable) mTextView.getText(); 2712 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2713 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2714 if (spanStart < 0 || spanEnd <= spanStart) { 2715 // Span has been removed 2716 return; 2717 } 2718 2719 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2720 // SuggestionSpans are removed by replace: save them before 2721 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2722 SuggestionSpan.class); 2723 final int length = suggestionSpans.length; 2724 int[] suggestionSpansStarts = new int[length]; 2725 int[] suggestionSpansEnds = new int[length]; 2726 int[] suggestionSpansFlags = new int[length]; 2727 for (int i = 0; i < length; i++) { 2728 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2729 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2730 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2731 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2732 2733 // Remove potential misspelled flags 2734 int suggestionSpanFlags = suggestionSpan.getFlags(); 2735 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2736 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2737 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2738 suggestionSpan.setFlags(suggestionSpanFlags); 2739 } 2740 } 2741 2742 // Notify source IME of the suggestion pick. Do this before swapping texts. 2743 targetSuggestionSpan.notifySelection( 2744 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2745 2746 // Swap text content between actual text and Suggestion span 2747 final int suggestionStart = suggestionInfo.mSuggestionStart; 2748 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2749 final String suggestion = suggestionInfo.mText.subSequence( 2750 suggestionStart, suggestionEnd).toString(); 2751 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2752 2753 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2754 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2755 2756 // Restore previous SuggestionSpans 2757 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2758 for (int i = 0; i < length; i++) { 2759 // Only spans that include the modified region make sense after replacement 2760 // Spans partially included in the replaced region are removed, there is no 2761 // way to assign them a valid range after replacement 2762 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2763 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2764 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2765 } 2766 } 2767 // Move cursor at the end of the replaced word 2768 final int newCursorPosition = spanEnd + lengthDelta; 2769 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2770 } 2771 2772 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2773 new MenuItem.OnMenuItemClickListener() { 2774 @Override 2775 public boolean onMenuItemClick(MenuItem item) { 2776 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2777 return true; 2778 } 2779 return mTextView.onTextContextMenuItem(item.getItemId()); 2780 } 2781 }; 2782 2783 /** 2784 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2785 * pop-up should be displayed. 2786 * Also monitors {@link Selection} to call back to the attached input method. 2787 */ 2788 private class SpanController implements SpanWatcher { 2789 2790 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2791 2792 private EasyEditPopupWindow mPopupWindow; 2793 2794 private Runnable mHidePopup; 2795 2796 // This function is pure but inner classes can't have static functions 2797 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2798 final Object span) { 2799 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2800 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2801 } 2802 2803 @Override 2804 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2805 if (isNonIntermediateSelectionSpan(text, span)) { 2806 sendUpdateSelection(); 2807 } else if (span instanceof EasyEditSpan) { 2808 if (mPopupWindow == null) { 2809 mPopupWindow = new EasyEditPopupWindow(); 2810 mHidePopup = new Runnable() { 2811 @Override 2812 public void run() { 2813 hide(); 2814 } 2815 }; 2816 } 2817 2818 // Make sure there is only at most one EasyEditSpan in the text 2819 if (mPopupWindow.mEasyEditSpan != null) { 2820 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2821 } 2822 2823 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2824 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2825 @Override 2826 public void onDeleteClick(EasyEditSpan span) { 2827 Editable editable = (Editable) mTextView.getText(); 2828 int start = editable.getSpanStart(span); 2829 int end = editable.getSpanEnd(span); 2830 if (start >= 0 && end >= 0) { 2831 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2832 mTextView.deleteText_internal(start, end); 2833 } 2834 editable.removeSpan(span); 2835 } 2836 }); 2837 2838 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2839 // The window is not visible yet, ignore the text change. 2840 return; 2841 } 2842 2843 if (mTextView.getLayout() == null) { 2844 // The view has not been laid out yet, ignore the text change 2845 return; 2846 } 2847 2848 if (extractedTextModeWillBeStarted()) { 2849 // The input is in extract mode. Do not handle the easy edit in 2850 // the original TextView, as the ExtractEditText will do 2851 return; 2852 } 2853 2854 mPopupWindow.show(); 2855 mTextView.removeCallbacks(mHidePopup); 2856 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2857 } 2858 } 2859 2860 @Override 2861 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2862 if (isNonIntermediateSelectionSpan(text, span)) { 2863 sendUpdateSelection(); 2864 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2865 hide(); 2866 } 2867 } 2868 2869 @Override 2870 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2871 int newStart, int newEnd) { 2872 if (isNonIntermediateSelectionSpan(text, span)) { 2873 sendUpdateSelection(); 2874 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2875 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2876 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2877 text.removeSpan(easyEditSpan); 2878 } 2879 } 2880 2881 public void hide() { 2882 if (mPopupWindow != null) { 2883 mPopupWindow.hide(); 2884 mTextView.removeCallbacks(mHidePopup); 2885 } 2886 } 2887 2888 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2889 try { 2890 PendingIntent pendingIntent = span.getPendingIntent(); 2891 if (pendingIntent != null) { 2892 Intent intent = new Intent(); 2893 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2894 pendingIntent.send(mTextView.getContext(), 0, intent); 2895 } 2896 } catch (CanceledException e) { 2897 // This should not happen, as we should try to send the intent only once. 2898 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2899 } 2900 } 2901 } 2902 2903 /** 2904 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2905 */ 2906 private interface EasyEditDeleteListener { 2907 2908 /** 2909 * Clicks the delete pop-up. 2910 */ 2911 void onDeleteClick(EasyEditSpan span); 2912 } 2913 2914 /** 2915 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2916 * by {@link SpanController}. 2917 */ 2918 private class EasyEditPopupWindow extends PinnedPopupWindow 2919 implements OnClickListener { 2920 private static final int POPUP_TEXT_LAYOUT = 2921 com.android.internal.R.layout.text_edit_action_popup_text; 2922 private TextView mDeleteTextView; 2923 private EasyEditSpan mEasyEditSpan; 2924 private EasyEditDeleteListener mOnDeleteListener; 2925 2926 @Override 2927 protected void createPopupWindow() { 2928 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2929 com.android.internal.R.attr.textSelectHandleWindowStyle); 2930 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2931 mPopupWindow.setClippingEnabled(true); 2932 } 2933 2934 @Override 2935 protected void initContentView() { 2936 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2937 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2938 mContentView = linearLayout; 2939 mContentView.setBackgroundResource( 2940 com.android.internal.R.drawable.text_edit_side_paste_window); 2941 2942 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 2943 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2944 2945 LayoutParams wrapContent = new LayoutParams( 2946 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2947 2948 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2949 mDeleteTextView.setLayoutParams(wrapContent); 2950 mDeleteTextView.setText(com.android.internal.R.string.delete); 2951 mDeleteTextView.setOnClickListener(this); 2952 mContentView.addView(mDeleteTextView); 2953 } 2954 2955 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2956 mEasyEditSpan = easyEditSpan; 2957 } 2958 2959 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2960 mOnDeleteListener = listener; 2961 } 2962 2963 @Override 2964 public void onClick(View view) { 2965 if (view == mDeleteTextView 2966 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2967 && mOnDeleteListener != null) { 2968 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2969 } 2970 } 2971 2972 @Override 2973 public void hide() { 2974 if (mEasyEditSpan != null) { 2975 mEasyEditSpan.setDeleteEnabled(false); 2976 } 2977 mOnDeleteListener = null; 2978 super.hide(); 2979 } 2980 2981 @Override 2982 protected int getTextOffset() { 2983 // Place the pop-up at the end of the span 2984 Editable editable = (Editable) mTextView.getText(); 2985 return editable.getSpanEnd(mEasyEditSpan); 2986 } 2987 2988 @Override 2989 protected int getVerticalLocalPosition(int line) { 2990 return mTextView.getLayout().getLineBottom(line); 2991 } 2992 2993 @Override 2994 protected int clipVertically(int positionY) { 2995 // As we display the pop-up below the span, no vertical clipping is required. 2996 return positionY; 2997 } 2998 } 2999 3000 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 3001 // 3 handles 3002 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 3003 // 1 CursorAnchorInfoNotifier 3004 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 3005 private TextViewPositionListener[] mPositionListeners = 3006 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 3007 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 3008 private boolean mPositionHasChanged = true; 3009 // Absolute position of the TextView with respect to its parent window 3010 private int mPositionX, mPositionY; 3011 private int mPositionXOnScreen, mPositionYOnScreen; 3012 private int mNumberOfListeners; 3013 private boolean mScrollHasChanged; 3014 final int[] mTempCoords = new int[2]; 3015 3016 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 3017 if (mNumberOfListeners == 0) { 3018 updatePosition(); 3019 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3020 vto.addOnPreDrawListener(this); 3021 } 3022 3023 int emptySlotIndex = -1; 3024 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3025 TextViewPositionListener listener = mPositionListeners[i]; 3026 if (listener == positionListener) { 3027 return; 3028 } else if (emptySlotIndex < 0 && listener == null) { 3029 emptySlotIndex = i; 3030 } 3031 } 3032 3033 mPositionListeners[emptySlotIndex] = positionListener; 3034 mCanMove[emptySlotIndex] = canMove; 3035 mNumberOfListeners++; 3036 } 3037 3038 public void removeSubscriber(TextViewPositionListener positionListener) { 3039 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3040 if (mPositionListeners[i] == positionListener) { 3041 mPositionListeners[i] = null; 3042 mNumberOfListeners--; 3043 break; 3044 } 3045 } 3046 3047 if (mNumberOfListeners == 0) { 3048 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3049 vto.removeOnPreDrawListener(this); 3050 } 3051 } 3052 3053 public int getPositionX() { 3054 return mPositionX; 3055 } 3056 3057 public int getPositionY() { 3058 return mPositionY; 3059 } 3060 3061 public int getPositionXOnScreen() { 3062 return mPositionXOnScreen; 3063 } 3064 3065 public int getPositionYOnScreen() { 3066 return mPositionYOnScreen; 3067 } 3068 3069 @Override 3070 public boolean onPreDraw() { 3071 updatePosition(); 3072 3073 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3074 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3075 TextViewPositionListener positionListener = mPositionListeners[i]; 3076 if (positionListener != null) { 3077 positionListener.updatePosition(mPositionX, mPositionY, 3078 mPositionHasChanged, mScrollHasChanged); 3079 } 3080 } 3081 } 3082 3083 mScrollHasChanged = false; 3084 return true; 3085 } 3086 3087 private void updatePosition() { 3088 mTextView.getLocationInWindow(mTempCoords); 3089 3090 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3091 3092 mPositionX = mTempCoords[0]; 3093 mPositionY = mTempCoords[1]; 3094 3095 mTextView.getLocationOnScreen(mTempCoords); 3096 3097 mPositionXOnScreen = mTempCoords[0]; 3098 mPositionYOnScreen = mTempCoords[1]; 3099 } 3100 3101 public void onScrollChanged() { 3102 mScrollHasChanged = true; 3103 } 3104 } 3105 3106 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3107 protected PopupWindow mPopupWindow; 3108 protected ViewGroup mContentView; 3109 int mPositionX, mPositionY; 3110 int mClippingLimitLeft, mClippingLimitRight; 3111 3112 protected abstract void createPopupWindow(); 3113 protected abstract void initContentView(); 3114 protected abstract int getTextOffset(); 3115 protected abstract int getVerticalLocalPosition(int line); 3116 protected abstract int clipVertically(int positionY); 3117 protected void setUp() { 3118 } 3119 3120 public PinnedPopupWindow() { 3121 // Due to calling subclass methods in base constructor, subclass constructor is not 3122 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3123 // a chance to initialize subclasses, call setUp() method here. 3124 // TODO: It is good to extract non trivial initialization code from constructor. 3125 setUp(); 3126 3127 createPopupWindow(); 3128 3129 mPopupWindow.setWindowLayoutType( 3130 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3131 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3132 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3133 3134 initContentView(); 3135 3136 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3137 ViewGroup.LayoutParams.WRAP_CONTENT); 3138 mContentView.setLayoutParams(wrapContent); 3139 3140 mPopupWindow.setContentView(mContentView); 3141 } 3142 3143 public void show() { 3144 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3145 3146 computeLocalPosition(); 3147 3148 final PositionListener positionListener = getPositionListener(); 3149 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3150 } 3151 3152 protected void measureContent() { 3153 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3154 mContentView.measure( 3155 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3156 View.MeasureSpec.AT_MOST), 3157 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3158 View.MeasureSpec.AT_MOST)); 3159 } 3160 3161 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3162 * positioned according to viewportToContentHorizontalOffset. 3163 * 3164 * This method assumes that mContentView has properly been measured from its content. */ 3165 private void computeLocalPosition() { 3166 measureContent(); 3167 final int width = mContentView.getMeasuredWidth(); 3168 final int offset = getTextOffset(); 3169 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3170 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3171 3172 final int line = mTextView.getLayout().getLineForOffset(offset); 3173 mPositionY = getVerticalLocalPosition(line); 3174 mPositionY += mTextView.viewportToContentVerticalOffset(); 3175 } 3176 3177 private void updatePosition(int parentPositionX, int parentPositionY) { 3178 int positionX = parentPositionX + mPositionX; 3179 int positionY = parentPositionY + mPositionY; 3180 3181 positionY = clipVertically(positionY); 3182 3183 // Horizontal clipping 3184 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3185 final int width = mContentView.getMeasuredWidth(); 3186 positionX = Math.min( 3187 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3188 positionX = Math.max(-mClippingLimitLeft, positionX); 3189 3190 if (isShowing()) { 3191 mPopupWindow.update(positionX, positionY, -1, -1); 3192 } else { 3193 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3194 positionX, positionY); 3195 } 3196 } 3197 3198 public void hide() { 3199 if (!isShowing()) { 3200 return; 3201 } 3202 mPopupWindow.dismiss(); 3203 getPositionListener().removeSubscriber(this); 3204 } 3205 3206 @Override 3207 public void updatePosition(int parentPositionX, int parentPositionY, 3208 boolean parentPositionChanged, boolean parentScrolled) { 3209 // Either parentPositionChanged or parentScrolled is true, check if still visible 3210 if (isShowing() && isOffsetVisible(getTextOffset())) { 3211 if (parentScrolled) computeLocalPosition(); 3212 updatePosition(parentPositionX, parentPositionY); 3213 } else { 3214 hide(); 3215 } 3216 } 3217 3218 public boolean isShowing() { 3219 return mPopupWindow.isShowing(); 3220 } 3221 } 3222 3223 private static final class SuggestionInfo { 3224 // Range of actual suggestion within mText 3225 int mSuggestionStart, mSuggestionEnd; 3226 3227 // The SuggestionSpan that this TextView represents 3228 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3229 3230 // The index of this suggestion inside suggestionSpan 3231 int mSuggestionIndex; 3232 3233 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3234 3235 void clear() { 3236 mSuggestionSpanInfo.clear(); 3237 mText.clear(); 3238 } 3239 3240 // Utility method to set attributes about a SuggestionSpan. 3241 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3242 mSuggestionSpanInfo.mSuggestionSpan = span; 3243 mSuggestionSpanInfo.mSpanStart = spanStart; 3244 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3245 } 3246 } 3247 3248 private static final class SuggestionSpanInfo { 3249 // The SuggestionSpan; 3250 @Nullable 3251 SuggestionSpan mSuggestionSpan; 3252 3253 // The SuggestionSpan start position 3254 int mSpanStart; 3255 3256 // The SuggestionSpan end position 3257 int mSpanEnd; 3258 3259 void clear() { 3260 mSuggestionSpan = null; 3261 } 3262 } 3263 3264 private class SuggestionHelper { 3265 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3266 new SuggestionSpanComparator(); 3267 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3268 new HashMap<SuggestionSpan, Integer>(); 3269 3270 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3271 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3272 final int flag1 = span1.getFlags(); 3273 final int flag2 = span2.getFlags(); 3274 if (flag1 != flag2) { 3275 // The order here should match what is used in updateDrawState 3276 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3277 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3278 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3279 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3280 if (easy1 && !misspelled1) return -1; 3281 if (easy2 && !misspelled2) return 1; 3282 if (misspelled1) return -1; 3283 if (misspelled2) return 1; 3284 } 3285 3286 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3287 } 3288 } 3289 3290 /** 3291 * Returns the suggestion spans that cover the current cursor position. The suggestion 3292 * spans are sorted according to the length of text that they are attached to. 3293 */ 3294 private SuggestionSpan[] getSortedSuggestionSpans() { 3295 int pos = mTextView.getSelectionStart(); 3296 Spannable spannable = (Spannable) mTextView.getText(); 3297 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3298 3299 mSpansLengths.clear(); 3300 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3301 int start = spannable.getSpanStart(suggestionSpan); 3302 int end = spannable.getSpanEnd(suggestionSpan); 3303 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3304 } 3305 3306 // The suggestions are sorted according to their types (easy correction first, then 3307 // misspelled) and to the length of the text that they cover (shorter first). 3308 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3309 mSpansLengths.clear(); 3310 3311 return suggestionSpans; 3312 } 3313 3314 /** 3315 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3316 * position. 3317 * 3318 * @param suggestionInfos SuggestionInfo array the results will be set. 3319 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3320 * @return the number of suggestions actually fetched. 3321 */ 3322 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3323 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3324 final Spannable spannable = (Spannable) mTextView.getText(); 3325 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3326 final int nbSpans = suggestionSpans.length; 3327 if (nbSpans == 0) return 0; 3328 3329 int numberOfSuggestions = 0; 3330 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3331 final int spanStart = spannable.getSpanStart(suggestionSpan); 3332 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3333 3334 if (misspelledSpanInfo != null 3335 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3336 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3337 misspelledSpanInfo.mSpanStart = spanStart; 3338 misspelledSpanInfo.mSpanEnd = spanEnd; 3339 } 3340 3341 final String[] suggestions = suggestionSpan.getSuggestions(); 3342 final int nbSuggestions = suggestions.length; 3343 suggestionLoop: 3344 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3345 final String suggestion = suggestions[suggestionIndex]; 3346 for (int i = 0; i < numberOfSuggestions; i++) { 3347 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3348 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3349 final int otherSpanStart = 3350 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3351 final int otherSpanEnd = 3352 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3353 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3354 continue suggestionLoop; 3355 } 3356 } 3357 } 3358 3359 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3360 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3361 suggestionInfo.mSuggestionIndex = suggestionIndex; 3362 suggestionInfo.mSuggestionStart = 0; 3363 suggestionInfo.mSuggestionEnd = suggestion.length(); 3364 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3365 numberOfSuggestions++; 3366 if (numberOfSuggestions >= suggestionInfos.length) { 3367 return numberOfSuggestions; 3368 } 3369 } 3370 } 3371 return numberOfSuggestions; 3372 } 3373 } 3374 3375 @VisibleForTesting 3376 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3377 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3378 3379 // Key of intent extras for inserting new word into user dictionary. 3380 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3381 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3382 3383 private SuggestionInfo[] mSuggestionInfos; 3384 private int mNumberOfSuggestions; 3385 private boolean mCursorWasVisibleBeforeSuggestions; 3386 private boolean mIsShowingUp = false; 3387 private SuggestionAdapter mSuggestionsAdapter; 3388 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3389 private TextView mAddToDictionaryButton; 3390 private TextView mDeleteButton; 3391 private ListView mSuggestionListView; 3392 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3393 private int mContainerMarginWidth; 3394 private int mContainerMarginTop; 3395 private LinearLayout mContainerView; 3396 private Context mContext; // TODO: Make mContext final. 3397 3398 private class CustomPopupWindow extends PopupWindow { 3399 3400 @Override 3401 public void dismiss() { 3402 if (!isShowing()) { 3403 return; 3404 } 3405 super.dismiss(); 3406 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3407 3408 // Safe cast since show() checks that mTextView.getText() is an Editable 3409 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3410 3411 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3412 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3413 getInsertionController().show(); 3414 } 3415 } 3416 } 3417 3418 public SuggestionsPopupWindow() { 3419 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3420 } 3421 3422 @Override 3423 protected void setUp() { 3424 mContext = applyDefaultTheme(mTextView.getContext()); 3425 mHighlightSpan = new TextAppearanceSpan(mContext, 3426 mTextView.mTextEditSuggestionHighlightStyle); 3427 } 3428 3429 private Context applyDefaultTheme(Context originalContext) { 3430 TypedArray a = originalContext.obtainStyledAttributes( 3431 new int[]{com.android.internal.R.attr.isLightTheme}); 3432 boolean isLightTheme = a.getBoolean(0, true); 3433 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3434 : R.style.ThemeOverlay_Material_Dark; 3435 a.recycle(); 3436 return new ContextThemeWrapper(originalContext, themeId); 3437 } 3438 3439 @Override 3440 protected void createPopupWindow() { 3441 mPopupWindow = new CustomPopupWindow(); 3442 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3443 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3444 mPopupWindow.setFocusable(true); 3445 mPopupWindow.setClippingEnabled(false); 3446 } 3447 3448 @Override 3449 protected void initContentView() { 3450 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3451 Context.LAYOUT_INFLATER_SERVICE); 3452 mContentView = (ViewGroup) inflater.inflate( 3453 mTextView.mTextEditSuggestionContainerLayout, null); 3454 3455 mContainerView = (LinearLayout) mContentView.findViewById( 3456 com.android.internal.R.id.suggestionWindowContainer); 3457 ViewGroup.MarginLayoutParams lp = 3458 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3459 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3460 mContainerMarginTop = lp.topMargin; 3461 mClippingLimitLeft = lp.leftMargin; 3462 mClippingLimitRight = lp.rightMargin; 3463 3464 mSuggestionListView = (ListView) mContentView.findViewById( 3465 com.android.internal.R.id.suggestionContainer); 3466 3467 mSuggestionsAdapter = new SuggestionAdapter(); 3468 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3469 mSuggestionListView.setOnItemClickListener(this); 3470 3471 // Inflate the suggestion items once and for all. 3472 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3473 for (int i = 0; i < mSuggestionInfos.length; i++) { 3474 mSuggestionInfos[i] = new SuggestionInfo(); 3475 } 3476 3477 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3478 com.android.internal.R.id.addToDictionaryButton); 3479 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3480 public void onClick(View v) { 3481 final SuggestionSpan misspelledSpan = 3482 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3483 if (misspelledSpan == null) { 3484 // Span has been removed. 3485 return; 3486 } 3487 final Editable editable = (Editable) mTextView.getText(); 3488 final int spanStart = editable.getSpanStart(misspelledSpan); 3489 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3490 if (spanStart < 0 || spanEnd <= spanStart) { 3491 return; 3492 } 3493 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3494 3495 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3496 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3497 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3498 mTextView.getTextServicesLocale().toString()); 3499 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3500 mTextView.getContext().startActivity(intent); 3501 // There is no way to know if the word was indeed added. Re-check. 3502 // TODO The ExtractEditText should remove the span in the original text instead 3503 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3504 Selection.setSelection(editable, spanEnd); 3505 updateSpellCheckSpans(spanStart, spanEnd, false); 3506 hideWithCleanUp(); 3507 } 3508 }); 3509 3510 mDeleteButton = (TextView) mContentView.findViewById( 3511 com.android.internal.R.id.deleteButton); 3512 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3513 public void onClick(View v) { 3514 final Editable editable = (Editable) mTextView.getText(); 3515 3516 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3517 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3518 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3519 // Do not leave two adjacent spaces after deletion, or one at beginning of 3520 // text 3521 if (spanUnionEnd < editable.length() 3522 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3523 && (spanUnionStart == 0 3524 || Character.isSpaceChar( 3525 editable.charAt(spanUnionStart - 1)))) { 3526 spanUnionEnd = spanUnionEnd + 1; 3527 } 3528 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3529 } 3530 hideWithCleanUp(); 3531 } 3532 }); 3533 3534 } 3535 3536 public boolean isShowingUp() { 3537 return mIsShowingUp; 3538 } 3539 3540 public void onParentLostFocus() { 3541 mIsShowingUp = false; 3542 } 3543 3544 private class SuggestionAdapter extends BaseAdapter { 3545 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3546 Context.LAYOUT_INFLATER_SERVICE); 3547 3548 @Override 3549 public int getCount() { 3550 return mNumberOfSuggestions; 3551 } 3552 3553 @Override 3554 public Object getItem(int position) { 3555 return mSuggestionInfos[position]; 3556 } 3557 3558 @Override 3559 public long getItemId(int position) { 3560 return position; 3561 } 3562 3563 @Override 3564 public View getView(int position, View convertView, ViewGroup parent) { 3565 TextView textView = (TextView) convertView; 3566 3567 if (textView == null) { 3568 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3569 parent, false); 3570 } 3571 3572 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3573 textView.setText(suggestionInfo.mText); 3574 return textView; 3575 } 3576 } 3577 3578 @VisibleForTesting 3579 public ViewGroup getContentViewForTesting() { 3580 return mContentView; 3581 } 3582 3583 @Override 3584 public void show() { 3585 if (!(mTextView.getText() instanceof Editable)) return; 3586 if (extractedTextModeWillBeStarted()) { 3587 return; 3588 } 3589 3590 if (updateSuggestions()) { 3591 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3592 mTextView.setCursorVisible(false); 3593 mIsShowingUp = true; 3594 super.show(); 3595 } 3596 } 3597 3598 @Override 3599 protected void measureContent() { 3600 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3601 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3602 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3603 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3604 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3605 3606 int width = 0; 3607 View view = null; 3608 for (int i = 0; i < mNumberOfSuggestions; i++) { 3609 view = mSuggestionsAdapter.getView(i, view, mContentView); 3610 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3611 view.measure(horizontalMeasure, verticalMeasure); 3612 width = Math.max(width, view.getMeasuredWidth()); 3613 } 3614 3615 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3616 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3617 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3618 } 3619 3620 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3621 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3622 3623 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3624 + mContainerMarginWidth; 3625 3626 // Enforce the width based on actual text widths 3627 mContentView.measure( 3628 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3629 verticalMeasure); 3630 3631 Drawable popupBackground = mPopupWindow.getBackground(); 3632 if (popupBackground != null) { 3633 if (mTempRect == null) mTempRect = new Rect(); 3634 popupBackground.getPadding(mTempRect); 3635 width += mTempRect.left + mTempRect.right; 3636 } 3637 mPopupWindow.setWidth(width); 3638 } 3639 3640 @Override 3641 protected int getTextOffset() { 3642 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3643 } 3644 3645 @Override 3646 protected int getVerticalLocalPosition(int line) { 3647 return mTextView.getLayout().getLineBottom(line) - mContainerMarginTop; 3648 } 3649 3650 @Override 3651 protected int clipVertically(int positionY) { 3652 final int height = mContentView.getMeasuredHeight(); 3653 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3654 return Math.min(positionY, displayMetrics.heightPixels - height); 3655 } 3656 3657 private void hideWithCleanUp() { 3658 for (final SuggestionInfo info : mSuggestionInfos) { 3659 info.clear(); 3660 } 3661 mMisspelledSpanInfo.clear(); 3662 hide(); 3663 } 3664 3665 private boolean updateSuggestions() { 3666 Spannable spannable = (Spannable) mTextView.getText(); 3667 mNumberOfSuggestions = 3668 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3669 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3670 return false; 3671 } 3672 3673 int spanUnionStart = mTextView.getText().length(); 3674 int spanUnionEnd = 0; 3675 3676 for (int i = 0; i < mNumberOfSuggestions; i++) { 3677 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3678 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3679 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3680 } 3681 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3682 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3683 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3684 } 3685 3686 for (int i = 0; i < mNumberOfSuggestions; i++) { 3687 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3688 } 3689 3690 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3691 int addToDictionaryButtonVisibility = View.GONE; 3692 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3693 if (mMisspelledSpanInfo.mSpanStart >= 0 3694 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3695 addToDictionaryButtonVisibility = View.VISIBLE; 3696 } 3697 } 3698 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3699 3700 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3701 final int underlineColor; 3702 if (mNumberOfSuggestions != 0) { 3703 underlineColor = 3704 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3705 } else { 3706 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3707 } 3708 3709 if (underlineColor == 0) { 3710 // Fallback on the default highlight color when the first span does not provide one 3711 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3712 } else { 3713 final float BACKGROUND_TRANSPARENCY = 0.4f; 3714 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3715 mSuggestionRangeSpan.setBackgroundColor( 3716 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3717 } 3718 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3719 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3720 3721 mSuggestionsAdapter.notifyDataSetChanged(); 3722 return true; 3723 } 3724 3725 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3726 int unionEnd) { 3727 final Spannable text = (Spannable) mTextView.getText(); 3728 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3729 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3730 3731 // Adjust the start/end of the suggestion span 3732 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3733 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3734 + suggestionInfo.mText.length(); 3735 3736 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3737 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3738 3739 // Add the text before and after the span. 3740 final String textAsString = text.toString(); 3741 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3742 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3743 } 3744 3745 @Override 3746 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3747 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3748 replaceWithSuggestion(suggestionInfo); 3749 hideWithCleanUp(); 3750 } 3751 } 3752 3753 /** 3754 * An ActionMode Callback class that is used to provide actions while in text insertion or 3755 * selection mode. 3756 * 3757 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3758 * actions, depending on which of these this TextView supports and the current selection. 3759 */ 3760 private class TextActionModeCallback extends ActionMode.Callback2 { 3761 private final Path mSelectionPath = new Path(); 3762 private final RectF mSelectionBounds = new RectF(); 3763 private final boolean mHasSelection; 3764 private final int mHandleHeight; 3765 3766 public TextActionModeCallback(boolean hasSelection) { 3767 mHasSelection = hasSelection; 3768 if (mHasSelection) { 3769 SelectionModifierCursorController selectionController = getSelectionController(); 3770 if (selectionController.mStartHandle == null) { 3771 // As these are for initializing selectionController, hide() must be called. 3772 selectionController.initDrawables(); 3773 selectionController.initHandles(); 3774 selectionController.hide(); 3775 } 3776 mHandleHeight = Math.max( 3777 mSelectHandleLeft.getMinimumHeight(), 3778 mSelectHandleRight.getMinimumHeight()); 3779 } else { 3780 InsertionPointCursorController insertionController = getInsertionController(); 3781 if (insertionController != null) { 3782 insertionController.getHandle(); 3783 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3784 } else { 3785 mHandleHeight = 0; 3786 } 3787 } 3788 } 3789 3790 @Override 3791 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3792 mode.setTitle(null); 3793 mode.setSubtitle(null); 3794 mode.setTitleOptionalHint(true); 3795 populateMenuWithItems(menu); 3796 3797 Callback customCallback = getCustomCallback(); 3798 if (customCallback != null) { 3799 if (!customCallback.onCreateActionMode(mode, menu)) { 3800 // The custom mode can choose to cancel the action mode, dismiss selection. 3801 Selection.setSelection((Spannable) mTextView.getText(), 3802 mTextView.getSelectionEnd()); 3803 return false; 3804 } 3805 } 3806 3807 if (mTextView.canProcessText()) { 3808 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3809 } 3810 3811 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3812 if (mHasSelection && !mTextView.hasTransientState()) { 3813 mTextView.setHasTransientState(true); 3814 } 3815 return true; 3816 } else { 3817 return false; 3818 } 3819 } 3820 3821 private Callback getCustomCallback() { 3822 return mHasSelection 3823 ? mCustomSelectionActionModeCallback 3824 : mCustomInsertionActionModeCallback; 3825 } 3826 3827 private void populateMenuWithItems(Menu menu) { 3828 if (mTextView.canCut()) { 3829 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3830 com.android.internal.R.string.cut) 3831 .setAlphabeticShortcut('x') 3832 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3833 } 3834 3835 if (mTextView.canCopy()) { 3836 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3837 com.android.internal.R.string.copy) 3838 .setAlphabeticShortcut('c') 3839 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3840 } 3841 3842 if (mTextView.canPaste()) { 3843 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3844 com.android.internal.R.string.paste) 3845 .setAlphabeticShortcut('v') 3846 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3847 } 3848 3849 if (mTextView.canShare()) { 3850 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3851 com.android.internal.R.string.share) 3852 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3853 } 3854 3855 if (mTextView.canRequestAutofill()) { 3856 final String selected = mTextView.getSelectedText(); 3857 if (selected == null || selected.isEmpty()) { 3858 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3859 com.android.internal.R.string.autofill) 3860 .setShowAsAction(MenuItem.SHOW_AS_OVERFLOW_ALWAYS); 3861 } 3862 } 3863 3864 if (mTextView.canPasteAsPlainText()) { 3865 menu.add( 3866 Menu.NONE, 3867 TextView.ID_PASTE_AS_PLAIN_TEXT, 3868 MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 3869 com.android.internal.R.string.paste_as_plain_text) 3870 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3871 } 3872 3873 updateSelectAllItem(menu); 3874 updateReplaceItem(menu); 3875 updateAssistMenuItem(menu); 3876 } 3877 3878 @Override 3879 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3880 updateSelectAllItem(menu); 3881 updateReplaceItem(menu); 3882 updateAssistMenuItem(menu); 3883 3884 Callback customCallback = getCustomCallback(); 3885 if (customCallback != null) { 3886 return customCallback.onPrepareActionMode(mode, menu); 3887 } 3888 return true; 3889 } 3890 3891 private void updateSelectAllItem(Menu menu) { 3892 boolean canSelectAll = mTextView.canSelectAllText(); 3893 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3894 if (canSelectAll && !selectAllItemExists) { 3895 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3896 com.android.internal.R.string.selectAll) 3897 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3898 } else if (!canSelectAll && selectAllItemExists) { 3899 menu.removeItem(TextView.ID_SELECT_ALL); 3900 } 3901 } 3902 3903 private void updateReplaceItem(Menu menu) { 3904 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3905 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3906 if (canReplace && !replaceItemExists) { 3907 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3908 com.android.internal.R.string.replace) 3909 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3910 } else if (!canReplace && replaceItemExists) { 3911 menu.removeItem(TextView.ID_REPLACE); 3912 } 3913 } 3914 3915 private void updateAssistMenuItem(Menu menu) { 3916 menu.removeItem(TextView.ID_ASSIST); 3917 final TextClassification textClassification = 3918 getSelectionActionModeHelper().getTextClassification(); 3919 if (canAssist()) { 3920 menu.add(TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, 3921 textClassification.getLabel()) 3922 .setIcon(textClassification.getIcon()) 3923 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3924 mMetricsLogger.write( 3925 new LogMaker(MetricsEvent.TEXT_SELECTION_MENU_ITEM_ASSIST) 3926 .setType(MetricsEvent.TYPE_OPEN) 3927 .setSubtype(textClassification.getLogType())); 3928 } 3929 } 3930 3931 private boolean canAssist() { 3932 final TextClassification textClassification = 3933 getSelectionActionModeHelper().getTextClassification(); 3934 return mTextView.isDeviceProvisioned() 3935 && textClassification != null 3936 && (textClassification.getIcon() != null 3937 || !TextUtils.isEmpty(textClassification.getLabel())) 3938 && (textClassification.getOnClickListener() != null 3939 || (textClassification.getIntent() != null 3940 && mTextView.getContext().canStartActivityForResult())); 3941 } 3942 3943 @Override 3944 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3945 getSelectionActionModeHelper().onSelectionAction(item.getItemId()); 3946 3947 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3948 return true; 3949 } 3950 Callback customCallback = getCustomCallback(); 3951 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3952 return true; 3953 } 3954 final TextClassification textClassification = 3955 getSelectionActionModeHelper().getTextClassification(); 3956 if (TextView.ID_ASSIST == item.getItemId() && textClassification != null) { 3957 final OnClickListener onClickListener = 3958 textClassification.getOnClickListener(); 3959 if (onClickListener != null) { 3960 onClickListener.onClick(mTextView); 3961 } else { 3962 final Intent intent = textClassification.getIntent(); 3963 if (intent != null) { 3964 TextClassification.createStartActivityOnClickListener( 3965 mTextView.getContext(), intent) 3966 .onClick(mTextView); 3967 } 3968 } 3969 mMetricsLogger.action( 3970 MetricsEvent.ACTION_TEXT_SELECTION_MENU_ITEM_ASSIST, 3971 textClassification.getLogType()); 3972 stopTextActionMode(); 3973 return true; 3974 } 3975 return mTextView.onTextContextMenuItem(item.getItemId()); 3976 } 3977 3978 @Override 3979 public void onDestroyActionMode(ActionMode mode) { 3980 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3981 getSelectionActionModeHelper().onDestroyActionMode(); 3982 mTextActionMode = null; 3983 Callback customCallback = getCustomCallback(); 3984 if (customCallback != null) { 3985 customCallback.onDestroyActionMode(mode); 3986 } 3987 3988 if (!mPreserveSelection) { 3989 /* 3990 * Leave current selection when we tentatively destroy action mode for the 3991 * selection. If we're detaching from a window, we'll bring back the selection 3992 * mode when (if) we get reattached. 3993 */ 3994 Selection.setSelection((Spannable) mTextView.getText(), 3995 mTextView.getSelectionEnd()); 3996 } 3997 3998 if (mSelectionModifierCursorController != null) { 3999 mSelectionModifierCursorController.hide(); 4000 } 4001 } 4002 4003 @Override 4004 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 4005 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 4006 super.onGetContentRect(mode, view, outRect); 4007 return; 4008 } 4009 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 4010 // We have a selection. 4011 mSelectionPath.reset(); 4012 mTextView.getLayout().getSelectionPath( 4013 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 4014 mSelectionPath.computeBounds(mSelectionBounds, true); 4015 mSelectionBounds.bottom += mHandleHeight; 4016 } else if (mCursorCount == 2) { 4017 // We have a split cursor. In this case, we take the rectangle that includes both 4018 // parts of the cursor to ensure we don't obscure either of them. 4019 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 4020 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 4021 mSelectionBounds.set( 4022 Math.min(firstCursorBounds.left, secondCursorBounds.left), 4023 Math.min(firstCursorBounds.top, secondCursorBounds.top), 4024 Math.max(firstCursorBounds.right, secondCursorBounds.right), 4025 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 4026 + mHandleHeight); 4027 } else { 4028 // We have a single cursor. 4029 Layout layout = mTextView.getLayout(); 4030 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 4031 float primaryHorizontal = clampHorizontalPosition(null, 4032 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 4033 mSelectionBounds.set( 4034 primaryHorizontal, 4035 layout.getLineTop(line), 4036 primaryHorizontal, 4037 layout.getLineTop(line + 1) + mHandleHeight); 4038 } 4039 // Take TextView's padding and scroll into account. 4040 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4041 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4042 outRect.set( 4043 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4044 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4045 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4046 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4047 } 4048 } 4049 4050 /** 4051 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4052 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4053 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4054 */ 4055 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4056 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4057 final int[] mTmpIntOffset = new int[2]; 4058 final Matrix mViewToScreenMatrix = new Matrix(); 4059 4060 @Override 4061 public void updatePosition(int parentPositionX, int parentPositionY, 4062 boolean parentPositionChanged, boolean parentScrolled) { 4063 final InputMethodState ims = mInputMethodState; 4064 if (ims == null || ims.mBatchEditNesting > 0) { 4065 return; 4066 } 4067 final InputMethodManager imm = InputMethodManager.peekInstance(); 4068 if (null == imm) { 4069 return; 4070 } 4071 if (!imm.isActive(mTextView)) { 4072 return; 4073 } 4074 // Skip if the IME has not requested the cursor/anchor position. 4075 if (!imm.isCursorAnchorInfoEnabled()) { 4076 return; 4077 } 4078 Layout layout = mTextView.getLayout(); 4079 if (layout == null) { 4080 return; 4081 } 4082 4083 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4084 builder.reset(); 4085 4086 final int selectionStart = mTextView.getSelectionStart(); 4087 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4088 4089 // Construct transformation matrix from view local coordinates to screen coordinates. 4090 mViewToScreenMatrix.set(mTextView.getMatrix()); 4091 mTextView.getLocationOnScreen(mTmpIntOffset); 4092 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4093 builder.setMatrix(mViewToScreenMatrix); 4094 4095 final float viewportToContentHorizontalOffset = 4096 mTextView.viewportToContentHorizontalOffset(); 4097 final float viewportToContentVerticalOffset = 4098 mTextView.viewportToContentVerticalOffset(); 4099 4100 final CharSequence text = mTextView.getText(); 4101 if (text instanceof Spannable) { 4102 final Spannable sp = (Spannable) text; 4103 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4104 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4105 if (composingTextEnd < composingTextStart) { 4106 final int temp = composingTextEnd; 4107 composingTextEnd = composingTextStart; 4108 composingTextStart = temp; 4109 } 4110 final boolean hasComposingText = 4111 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4112 if (hasComposingText) { 4113 final CharSequence composingText = text.subSequence(composingTextStart, 4114 composingTextEnd); 4115 builder.setComposingText(composingTextStart, composingText); 4116 mTextView.populateCharacterBounds(builder, composingTextStart, 4117 composingTextEnd, viewportToContentHorizontalOffset, 4118 viewportToContentVerticalOffset); 4119 } 4120 } 4121 4122 // Treat selectionStart as the insertion point. 4123 if (0 <= selectionStart) { 4124 final int offset = selectionStart; 4125 final int line = layout.getLineForOffset(offset); 4126 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4127 + viewportToContentHorizontalOffset; 4128 final float insertionMarkerTop = layout.getLineTop(line) 4129 + viewportToContentVerticalOffset; 4130 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4131 + viewportToContentVerticalOffset; 4132 final float insertionMarkerBottom = layout.getLineBottom(line) 4133 + viewportToContentVerticalOffset; 4134 final boolean isTopVisible = mTextView 4135 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4136 final boolean isBottomVisible = mTextView 4137 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4138 int insertionMarkerFlags = 0; 4139 if (isTopVisible || isBottomVisible) { 4140 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4141 } 4142 if (!isTopVisible || !isBottomVisible) { 4143 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4144 } 4145 if (layout.isRtlCharAt(offset)) { 4146 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4147 } 4148 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4149 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4150 } 4151 4152 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4153 } 4154 } 4155 4156 @VisibleForTesting 4157 public abstract class HandleView extends View implements TextViewPositionListener { 4158 protected Drawable mDrawable; 4159 protected Drawable mDrawableLtr; 4160 protected Drawable mDrawableRtl; 4161 private final PopupWindow mContainer; 4162 // Position with respect to the parent TextView 4163 private int mPositionX, mPositionY; 4164 private boolean mIsDragging; 4165 // Offset from touch position to mPosition 4166 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4167 protected int mHotspotX; 4168 protected int mHorizontalGravity; 4169 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4170 private float mTouchOffsetY; 4171 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4172 private float mIdealVerticalOffset; 4173 // Parent's (TextView) previous position in window 4174 private int mLastParentX, mLastParentY; 4175 // Parent's (TextView) previous position on screen 4176 private int mLastParentXOnScreen, mLastParentYOnScreen; 4177 // Previous text character offset 4178 protected int mPreviousOffset = -1; 4179 // Previous text character offset 4180 private boolean mPositionHasChanged = true; 4181 // Minimum touch target size for handles 4182 private int mMinSize; 4183 // Indicates the line of text that the handle is on. 4184 protected int mPrevLine = UNSET_LINE; 4185 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4186 // when selecting text when the handles jump to the end / start of words which may be on 4187 // a different line. 4188 protected int mPreviousLineTouched = UNSET_LINE; 4189 4190 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4191 super(mTextView.getContext()); 4192 setId(id); 4193 mContainer = new PopupWindow(mTextView.getContext(), null, 4194 com.android.internal.R.attr.textSelectHandleWindowStyle); 4195 mContainer.setSplitTouchEnabled(true); 4196 mContainer.setClippingEnabled(false); 4197 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4198 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4199 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4200 mContainer.setContentView(this); 4201 4202 mDrawableLtr = drawableLtr; 4203 mDrawableRtl = drawableRtl; 4204 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4205 com.android.internal.R.dimen.text_handle_min_size); 4206 4207 updateDrawable(); 4208 4209 final int handleHeight = getPreferredHeight(); 4210 mTouchOffsetY = -0.3f * handleHeight; 4211 mIdealVerticalOffset = 0.7f * handleHeight; 4212 } 4213 4214 public float getIdealVerticalOffset() { 4215 return mIdealVerticalOffset; 4216 } 4217 4218 protected void updateDrawable() { 4219 if (mIsDragging) { 4220 // Don't update drawable during dragging. 4221 return; 4222 } 4223 final Layout layout = mTextView.getLayout(); 4224 if (layout == null) { 4225 return; 4226 } 4227 final int offset = getCurrentCursorOffset(); 4228 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4229 final Drawable oldDrawable = mDrawable; 4230 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4231 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4232 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4233 if (oldDrawable != mDrawable && isShowing()) { 4234 // Update popup window position. 4235 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4236 - getHorizontalOffset() + getCursorOffset(); 4237 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4238 mPositionHasChanged = true; 4239 updatePosition(mLastParentX, mLastParentY, false, false); 4240 postInvalidate(); 4241 } 4242 } 4243 4244 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4245 protected abstract int getHorizontalGravity(boolean isRtlRun); 4246 4247 // Touch-up filter: number of previous positions remembered 4248 private static final int HISTORY_SIZE = 5; 4249 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4250 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4251 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4252 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4253 private int mPreviousOffsetIndex = 0; 4254 private int mNumberPreviousOffsets = 0; 4255 4256 private void startTouchUpFilter(int offset) { 4257 mNumberPreviousOffsets = 0; 4258 addPositionToTouchUpFilter(offset); 4259 } 4260 4261 private void addPositionToTouchUpFilter(int offset) { 4262 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4263 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4264 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4265 mNumberPreviousOffsets++; 4266 } 4267 4268 private void filterOnTouchUp(boolean fromTouchScreen) { 4269 final long now = SystemClock.uptimeMillis(); 4270 int i = 0; 4271 int index = mPreviousOffsetIndex; 4272 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4273 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4274 i++; 4275 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4276 } 4277 4278 if (i > 0 && i < iMax 4279 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4280 positionAtCursorOffset(mPreviousOffsets[index], false, fromTouchScreen); 4281 } 4282 } 4283 4284 public boolean offsetHasBeenChanged() { 4285 return mNumberPreviousOffsets > 1; 4286 } 4287 4288 @Override 4289 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4290 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4291 } 4292 4293 @Override 4294 public void invalidate() { 4295 super.invalidate(); 4296 if (isShowing()) { 4297 positionAtCursorOffset(getCurrentCursorOffset(), true, false); 4298 } 4299 }; 4300 4301 private int getPreferredWidth() { 4302 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4303 } 4304 4305 private int getPreferredHeight() { 4306 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4307 } 4308 4309 public void show() { 4310 if (isShowing()) return; 4311 4312 getPositionListener().addSubscriber(this, true /* local position may change */); 4313 4314 // Make sure the offset is always considered new, even when focusing at same position 4315 mPreviousOffset = -1; 4316 positionAtCursorOffset(getCurrentCursorOffset(), false, false); 4317 } 4318 4319 protected void dismiss() { 4320 mIsDragging = false; 4321 mContainer.dismiss(); 4322 onDetached(); 4323 } 4324 4325 public void hide() { 4326 dismiss(); 4327 4328 getPositionListener().removeSubscriber(this); 4329 } 4330 4331 public boolean isShowing() { 4332 return mContainer.isShowing(); 4333 } 4334 4335 private boolean isVisible() { 4336 // Always show a dragging handle. 4337 if (mIsDragging) { 4338 return true; 4339 } 4340 4341 if (mTextView.isInBatchEditMode()) { 4342 return false; 4343 } 4344 4345 return mTextView.isPositionVisible( 4346 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4347 } 4348 4349 public abstract int getCurrentCursorOffset(); 4350 4351 protected abstract void updateSelection(int offset); 4352 4353 protected abstract void updatePosition(float x, float y, boolean fromTouchScreen); 4354 4355 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4356 return layout.isRtlCharAt(offset); 4357 } 4358 4359 @VisibleForTesting 4360 public float getHorizontal(@NonNull Layout layout, int offset) { 4361 return layout.getPrimaryHorizontal(offset); 4362 } 4363 4364 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4365 return mTextView.getOffsetAtCoordinate(line, x); 4366 } 4367 4368 /** 4369 * @param offset Cursor offset. Must be in [-1, length]. 4370 * @param forceUpdatePosition whether to force update the position. This should be true 4371 * when If the parent has been scrolled, for example. 4372 * @param fromTouchScreen {@code true} if the cursor is moved with motion events from the 4373 * touch screen. 4374 */ 4375 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4376 boolean fromTouchScreen) { 4377 // A HandleView relies on the layout, which may be nulled by external methods 4378 Layout layout = mTextView.getLayout(); 4379 if (layout == null) { 4380 // Will update controllers' state, hiding them and stopping selection mode if needed 4381 prepareCursorControllers(); 4382 return; 4383 } 4384 layout = mTextView.getLayout(); 4385 4386 boolean offsetChanged = offset != mPreviousOffset; 4387 if (offsetChanged || forceUpdatePosition) { 4388 if (offsetChanged) { 4389 updateSelection(offset); 4390 if (fromTouchScreen && mHapticTextHandleEnabled) { 4391 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 4392 } 4393 addPositionToTouchUpFilter(offset); 4394 } 4395 final int line = layout.getLineForOffset(offset); 4396 mPrevLine = line; 4397 4398 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4399 - getHorizontalOffset() + getCursorOffset(); 4400 mPositionY = layout.getLineBottom(line); 4401 4402 // Take TextView's padding and scroll into account. 4403 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4404 mPositionY += mTextView.viewportToContentVerticalOffset(); 4405 4406 mPreviousOffset = offset; 4407 mPositionHasChanged = true; 4408 } 4409 } 4410 4411 /** 4412 * Return the clamped horizontal position for the first cursor. 4413 * 4414 * @param layout Text layout. 4415 * @param offset Character offset for the cursor. 4416 * @return The clamped horizontal position for the cursor. 4417 */ 4418 int getCursorHorizontalPosition(Layout layout, int offset) { 4419 return (int) (getHorizontal(layout, offset) - 0.5f); 4420 } 4421 4422 @Override 4423 public void updatePosition(int parentPositionX, int parentPositionY, 4424 boolean parentPositionChanged, boolean parentScrolled) { 4425 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled, false); 4426 if (parentPositionChanged || mPositionHasChanged) { 4427 if (mIsDragging) { 4428 // Update touchToWindow offset in case of parent scrolling while dragging 4429 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4430 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4431 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4432 mLastParentX = parentPositionX; 4433 mLastParentY = parentPositionY; 4434 } 4435 4436 onHandleMoved(); 4437 } 4438 4439 if (isVisible()) { 4440 // Transform to the window coordinates to follow the view tranformation. 4441 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4442 mTextView.transformFromViewToWindowSpace(pts); 4443 pts[0] -= mHotspotX + getHorizontalOffset(); 4444 4445 if (isShowing()) { 4446 mContainer.update(pts[0], pts[1], -1, -1); 4447 } else { 4448 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4449 } 4450 } else { 4451 if (isShowing()) { 4452 dismiss(); 4453 } 4454 } 4455 4456 mPositionHasChanged = false; 4457 } 4458 } 4459 4460 @Override 4461 protected void onDraw(Canvas c) { 4462 final int drawWidth = mDrawable.getIntrinsicWidth(); 4463 final int left = getHorizontalOffset(); 4464 4465 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4466 mDrawable.draw(c); 4467 } 4468 4469 private int getHorizontalOffset() { 4470 final int width = getPreferredWidth(); 4471 final int drawWidth = mDrawable.getIntrinsicWidth(); 4472 final int left; 4473 switch (mHorizontalGravity) { 4474 case Gravity.LEFT: 4475 left = 0; 4476 break; 4477 default: 4478 case Gravity.CENTER: 4479 left = (width - drawWidth) / 2; 4480 break; 4481 case Gravity.RIGHT: 4482 left = width - drawWidth; 4483 break; 4484 } 4485 return left; 4486 } 4487 4488 protected int getCursorOffset() { 4489 return 0; 4490 } 4491 4492 @Override 4493 public boolean onTouchEvent(MotionEvent ev) { 4494 updateFloatingToolbarVisibility(ev); 4495 4496 switch (ev.getActionMasked()) { 4497 case MotionEvent.ACTION_DOWN: { 4498 startTouchUpFilter(getCurrentCursorOffset()); 4499 4500 final PositionListener positionListener = getPositionListener(); 4501 mLastParentX = positionListener.getPositionX(); 4502 mLastParentY = positionListener.getPositionY(); 4503 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4504 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4505 4506 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4507 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4508 mTouchToWindowOffsetX = xInWindow - mPositionX; 4509 mTouchToWindowOffsetY = yInWindow - mPositionY; 4510 4511 mIsDragging = true; 4512 mPreviousLineTouched = UNSET_LINE; 4513 break; 4514 } 4515 4516 case MotionEvent.ACTION_MOVE: { 4517 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4518 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4519 4520 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4521 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4522 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4523 float newVerticalOffset; 4524 if (previousVerticalOffset < mIdealVerticalOffset) { 4525 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4526 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4527 } else { 4528 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4529 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4530 } 4531 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4532 4533 final float newPosX = 4534 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4535 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4536 4537 updatePosition(newPosX, newPosY, 4538 ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4539 break; 4540 } 4541 4542 case MotionEvent.ACTION_UP: 4543 filterOnTouchUp(ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4544 mIsDragging = false; 4545 updateDrawable(); 4546 break; 4547 4548 case MotionEvent.ACTION_CANCEL: 4549 mIsDragging = false; 4550 updateDrawable(); 4551 break; 4552 } 4553 return true; 4554 } 4555 4556 public boolean isDragging() { 4557 return mIsDragging; 4558 } 4559 4560 void onHandleMoved() {} 4561 4562 public void onDetached() {} 4563 } 4564 4565 private class InsertionHandleView extends HandleView { 4566 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4567 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4568 4569 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4570 private float mDownPositionX, mDownPositionY; 4571 private Runnable mHider; 4572 4573 public InsertionHandleView(Drawable drawable) { 4574 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4575 } 4576 4577 @Override 4578 public void show() { 4579 super.show(); 4580 4581 final long durationSinceCutOrCopy = 4582 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4583 4584 // Cancel the single tap delayed runnable. 4585 if (mInsertionActionModeRunnable != null 4586 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4587 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4588 || isCursorInsideEasyCorrectionSpan())) { 4589 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4590 } 4591 4592 // Prepare and schedule the single tap runnable to run exactly after the double tap 4593 // timeout has passed. 4594 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4595 && !isCursorInsideEasyCorrectionSpan() 4596 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4597 if (mTextActionMode == null) { 4598 if (mInsertionActionModeRunnable == null) { 4599 mInsertionActionModeRunnable = new Runnable() { 4600 @Override 4601 public void run() { 4602 startInsertionActionMode(); 4603 } 4604 }; 4605 } 4606 mTextView.postDelayed( 4607 mInsertionActionModeRunnable, 4608 ViewConfiguration.getDoubleTapTimeout() + 1); 4609 } 4610 4611 } 4612 4613 hideAfterDelay(); 4614 } 4615 4616 private void hideAfterDelay() { 4617 if (mHider == null) { 4618 mHider = new Runnable() { 4619 public void run() { 4620 hide(); 4621 } 4622 }; 4623 } else { 4624 removeHiderCallback(); 4625 } 4626 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4627 } 4628 4629 private void removeHiderCallback() { 4630 if (mHider != null) { 4631 mTextView.removeCallbacks(mHider); 4632 } 4633 } 4634 4635 @Override 4636 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4637 return drawable.getIntrinsicWidth() / 2; 4638 } 4639 4640 @Override 4641 protected int getHorizontalGravity(boolean isRtlRun) { 4642 return Gravity.CENTER_HORIZONTAL; 4643 } 4644 4645 @Override 4646 protected int getCursorOffset() { 4647 int offset = super.getCursorOffset(); 4648 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4649 if (cursor != null) { 4650 cursor.getPadding(mTempRect); 4651 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4652 } 4653 return offset; 4654 } 4655 4656 @Override 4657 int getCursorHorizontalPosition(Layout layout, int offset) { 4658 final Drawable drawable = mCursorCount > 0 ? mCursorDrawable[0] : null; 4659 if (drawable != null) { 4660 final float horizontal = getHorizontal(layout, offset); 4661 return clampHorizontalPosition(drawable, horizontal) + mTempRect.left; 4662 } 4663 return super.getCursorHorizontalPosition(layout, offset); 4664 } 4665 4666 @Override 4667 public boolean onTouchEvent(MotionEvent ev) { 4668 final boolean result = super.onTouchEvent(ev); 4669 4670 switch (ev.getActionMasked()) { 4671 case MotionEvent.ACTION_DOWN: 4672 mDownPositionX = ev.getRawX(); 4673 mDownPositionY = ev.getRawY(); 4674 break; 4675 4676 case MotionEvent.ACTION_UP: 4677 if (!offsetHasBeenChanged()) { 4678 final float deltaX = mDownPositionX - ev.getRawX(); 4679 final float deltaY = mDownPositionY - ev.getRawY(); 4680 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4681 4682 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4683 mTextView.getContext()); 4684 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4685 4686 if (distanceSquared < touchSlop * touchSlop) { 4687 // Tapping on the handle toggles the insertion action mode. 4688 if (mTextActionMode != null) { 4689 stopTextActionMode(); 4690 } else { 4691 startInsertionActionMode(); 4692 } 4693 } 4694 } else { 4695 if (mTextActionMode != null) { 4696 mTextActionMode.invalidateContentRect(); 4697 } 4698 } 4699 hideAfterDelay(); 4700 break; 4701 4702 case MotionEvent.ACTION_CANCEL: 4703 hideAfterDelay(); 4704 break; 4705 4706 default: 4707 break; 4708 } 4709 4710 return result; 4711 } 4712 4713 @Override 4714 public int getCurrentCursorOffset() { 4715 return mTextView.getSelectionStart(); 4716 } 4717 4718 @Override 4719 public void updateSelection(int offset) { 4720 Selection.setSelection((Spannable) mTextView.getText(), offset); 4721 } 4722 4723 @Override 4724 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4725 Layout layout = mTextView.getLayout(); 4726 int offset; 4727 if (layout != null) { 4728 if (mPreviousLineTouched == UNSET_LINE) { 4729 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4730 } 4731 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4732 offset = getOffsetAtCoordinate(layout, currLine, x); 4733 mPreviousLineTouched = currLine; 4734 } else { 4735 offset = -1; 4736 } 4737 positionAtCursorOffset(offset, false, fromTouchScreen); 4738 if (mTextActionMode != null) { 4739 invalidateActionMode(); 4740 } 4741 } 4742 4743 @Override 4744 void onHandleMoved() { 4745 super.onHandleMoved(); 4746 removeHiderCallback(); 4747 } 4748 4749 @Override 4750 public void onDetached() { 4751 super.onDetached(); 4752 removeHiderCallback(); 4753 } 4754 } 4755 4756 @Retention(RetentionPolicy.SOURCE) 4757 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4758 public @interface HandleType {} 4759 public static final int HANDLE_TYPE_SELECTION_START = 0; 4760 public static final int HANDLE_TYPE_SELECTION_END = 1; 4761 4762 private class SelectionHandleView extends HandleView { 4763 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4764 // end (HANDLE_TYPE_SELECTION_END). 4765 @HandleType 4766 private final int mHandleType; 4767 // Indicates whether the cursor is making adjustments within a word. 4768 private boolean mInWord = false; 4769 // Difference between touch position and word boundary position. 4770 private float mTouchWordDelta; 4771 // X value of the previous updatePosition call. 4772 private float mPrevX; 4773 // Indicates if the handle has moved a boundary between LTR and RTL text. 4774 private boolean mLanguageDirectionChanged = false; 4775 // Distance from edge of horizontally scrolling text view 4776 // to use to switch to character mode. 4777 private final float mTextViewEdgeSlop; 4778 // Used to save text view location. 4779 private final int[] mTextViewLocation = new int[2]; 4780 4781 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4782 @HandleType int handleType) { 4783 super(drawableLtr, drawableRtl, id); 4784 mHandleType = handleType; 4785 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4786 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4787 } 4788 4789 private boolean isStartHandle() { 4790 return mHandleType == HANDLE_TYPE_SELECTION_START; 4791 } 4792 4793 @Override 4794 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4795 if (isRtlRun == isStartHandle()) { 4796 return drawable.getIntrinsicWidth() / 4; 4797 } else { 4798 return (drawable.getIntrinsicWidth() * 3) / 4; 4799 } 4800 } 4801 4802 @Override 4803 protected int getHorizontalGravity(boolean isRtlRun) { 4804 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4805 } 4806 4807 @Override 4808 public int getCurrentCursorOffset() { 4809 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4810 } 4811 4812 @Override 4813 protected void updateSelection(int offset) { 4814 if (isStartHandle()) { 4815 Selection.setSelection((Spannable) mTextView.getText(), offset, 4816 mTextView.getSelectionEnd()); 4817 } else { 4818 Selection.setSelection((Spannable) mTextView.getText(), 4819 mTextView.getSelectionStart(), offset); 4820 } 4821 updateDrawable(); 4822 if (mTextActionMode != null) { 4823 invalidateActionMode(); 4824 } 4825 } 4826 4827 @Override 4828 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4829 final Layout layout = mTextView.getLayout(); 4830 if (layout == null) { 4831 // HandleView will deal appropriately in positionAtCursorOffset when 4832 // layout is null. 4833 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y), 4834 fromTouchScreen); 4835 return; 4836 } 4837 4838 if (mPreviousLineTouched == UNSET_LINE) { 4839 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4840 } 4841 4842 boolean positionCursor = false; 4843 final int anotherHandleOffset = 4844 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4845 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4846 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4847 4848 if (isStartHandle() && initialOffset >= anotherHandleOffset 4849 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4850 // Handles have crossed, bound it to the first selected line and 4851 // adjust by word / char as normal. 4852 currLine = layout.getLineForOffset(anotherHandleOffset); 4853 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4854 } 4855 4856 int offset = initialOffset; 4857 final int wordEnd = getWordEnd(offset); 4858 final int wordStart = getWordStart(offset); 4859 4860 if (mPrevX == UNSET_X_VALUE) { 4861 mPrevX = x; 4862 } 4863 4864 final int currentOffset = getCurrentCursorOffset(); 4865 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4866 final boolean atRtl = isAtRtlRun(layout, offset); 4867 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4868 4869 // We can't determine if the user is expanding or shrinking the selection if they're 4870 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4871 // the cursor at the current position. 4872 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4873 // We're on a boundary or this is the first direction change -- just update 4874 // to the current position. 4875 mLanguageDirectionChanged = true; 4876 mTouchWordDelta = 0.0f; 4877 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4878 return; 4879 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4880 // We've just moved past the boundary so update the position. After this we can 4881 // figure out if the user is expanding or shrinking to go by word or character. 4882 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4883 mTouchWordDelta = 0.0f; 4884 mLanguageDirectionChanged = false; 4885 return; 4886 } 4887 4888 boolean isExpanding; 4889 final float xDiff = x - mPrevX; 4890 if (isStartHandle()) { 4891 isExpanding = currLine < mPreviousLineTouched; 4892 } else { 4893 isExpanding = currLine > mPreviousLineTouched; 4894 } 4895 if (atRtl == isStartHandle()) { 4896 isExpanding |= xDiff > 0; 4897 } else { 4898 isExpanding |= xDiff < 0; 4899 } 4900 4901 if (mTextView.getHorizontallyScrolling()) { 4902 if (positionNearEdgeOfScrollingView(x, atRtl) 4903 && ((isStartHandle() && mTextView.getScrollX() != 0) 4904 || (!isStartHandle() 4905 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4906 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4907 || (!isStartHandle() && offset > currentOffset))) 4908 || !isExpanding)) { 4909 // If we're expanding ensure that the offset is actually expanding compared to 4910 // the current offset, if the handle snapped to the word, the finger position 4911 // may be out of sync and we don't want the selection to jump back. 4912 mTouchWordDelta = 0.0f; 4913 final int nextOffset = (atRtl == isStartHandle()) 4914 ? layout.getOffsetToRightOf(mPreviousOffset) 4915 : layout.getOffsetToLeftOf(mPreviousOffset); 4916 positionAndAdjustForCrossingHandles(nextOffset, fromTouchScreen); 4917 return; 4918 } 4919 } 4920 4921 if (isExpanding) { 4922 // User is increasing the selection. 4923 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4924 final boolean snapToWord = (!mInWord 4925 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4926 && atRtl == isAtRtlRun(layout, wordBoundary); 4927 if (snapToWord) { 4928 // Sometimes words can be broken across lines (Chinese, hyphenation). 4929 // We still snap to the word boundary but we only use the letters on the 4930 // current line to determine if the user is far enough into the word to snap. 4931 if (layout.getLineForOffset(wordBoundary) != currLine) { 4932 wordBoundary = isStartHandle() 4933 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4934 } 4935 final int offsetThresholdToSnap = isStartHandle() 4936 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4937 : wordStart + ((wordBoundary - wordStart) / 2); 4938 if (isStartHandle() 4939 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4940 // User is far enough into the word or on a different line so we expand by 4941 // word. 4942 offset = wordStart; 4943 } else if (!isStartHandle() 4944 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4945 // User is far enough into the word or on a different line so we expand by 4946 // word. 4947 offset = wordEnd; 4948 } else { 4949 offset = mPreviousOffset; 4950 } 4951 } 4952 if ((isStartHandle() && offset < initialOffset) 4953 || (!isStartHandle() && offset > initialOffset)) { 4954 final float adjustedX = getHorizontal(layout, offset); 4955 mTouchWordDelta = 4956 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4957 } else { 4958 mTouchWordDelta = 0.0f; 4959 } 4960 positionCursor = true; 4961 } else { 4962 final int adjustedOffset = 4963 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4964 final boolean shrinking = isStartHandle() 4965 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4966 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4967 if (shrinking) { 4968 // User is shrinking the selection. 4969 if (currLine != mPrevLine) { 4970 // We're on a different line, so we'll snap to word boundaries. 4971 offset = isStartHandle() ? wordStart : wordEnd; 4972 if ((isStartHandle() && offset < initialOffset) 4973 || (!isStartHandle() && offset > initialOffset)) { 4974 final float adjustedX = getHorizontal(layout, offset); 4975 mTouchWordDelta = 4976 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4977 } else { 4978 mTouchWordDelta = 0.0f; 4979 } 4980 } else { 4981 offset = adjustedOffset; 4982 } 4983 positionCursor = true; 4984 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4985 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4986 // Handle has jumped to the word boundary, and the user is moving 4987 // their finger towards the handle, the delta should be updated. 4988 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4989 - getHorizontal(layout, mPreviousOffset); 4990 } 4991 } 4992 4993 if (positionCursor) { 4994 mPreviousLineTouched = currLine; 4995 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4996 } 4997 mPrevX = x; 4998 } 4999 5000 @Override 5001 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 5002 boolean fromTouchScreen) { 5003 super.positionAtCursorOffset(offset, forceUpdatePosition, fromTouchScreen); 5004 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 5005 } 5006 5007 @Override 5008 public boolean onTouchEvent(MotionEvent event) { 5009 boolean superResult = super.onTouchEvent(event); 5010 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 5011 // Reset the touch word offset and x value when the user 5012 // re-engages the handle. 5013 mTouchWordDelta = 0.0f; 5014 mPrevX = UNSET_X_VALUE; 5015 } 5016 return superResult; 5017 } 5018 5019 private void positionAndAdjustForCrossingHandles(int offset, boolean fromTouchScreen) { 5020 final int anotherHandleOffset = 5021 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5022 if ((isStartHandle() && offset >= anotherHandleOffset) 5023 || (!isStartHandle() && offset <= anotherHandleOffset)) { 5024 mTouchWordDelta = 0.0f; 5025 final Layout layout = mTextView.getLayout(); 5026 if (layout != null && offset != anotherHandleOffset) { 5027 final float horiz = getHorizontal(layout, offset); 5028 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 5029 !isStartHandle()); 5030 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 5031 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 5032 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 5033 // This handle passes another one as it crossed a direction boundary. 5034 // Don't minimize the selection, but keep the handle at the run boundary. 5035 final int currentOffset = getCurrentCursorOffset(); 5036 final int offsetToGetRunRange = isStartHandle() 5037 ? currentOffset : Math.max(currentOffset - 1, 0); 5038 final long range = layout.getRunRange(offsetToGetRunRange); 5039 if (isStartHandle()) { 5040 offset = TextUtils.unpackRangeStartFromLong(range); 5041 } else { 5042 offset = TextUtils.unpackRangeEndFromLong(range); 5043 } 5044 positionAtCursorOffset(offset, false, fromTouchScreen); 5045 return; 5046 } 5047 } 5048 // Handles can not cross and selection is at least one character. 5049 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5050 } 5051 positionAtCursorOffset(offset, false, fromTouchScreen); 5052 } 5053 5054 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5055 mTextView.getLocationOnScreen(mTextViewLocation); 5056 boolean nearEdge; 5057 if (atRtl == isStartHandle()) { 5058 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5059 - mTextView.getPaddingRight(); 5060 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5061 } else { 5062 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5063 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5064 } 5065 return nearEdge; 5066 } 5067 5068 @Override 5069 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5070 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5071 return layout.isRtlCharAt(offsetToCheck); 5072 } 5073 5074 @Override 5075 public float getHorizontal(@NonNull Layout layout, int offset) { 5076 return getHorizontal(layout, offset, isStartHandle()); 5077 } 5078 5079 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5080 final int line = layout.getLineForOffset(offset); 5081 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5082 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5083 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5084 return (isRtlChar == isRtlParagraph) 5085 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5086 } 5087 5088 @Override 5089 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5090 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5091 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5092 if (!layout.isLevelBoundary(primaryOffset)) { 5093 return primaryOffset; 5094 } 5095 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5096 final int currentOffset = getCurrentCursorOffset(); 5097 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5098 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5099 if (primaryDiff < secondaryDiff) { 5100 return primaryOffset; 5101 } else if (primaryDiff > secondaryDiff) { 5102 return secondaryOffset; 5103 } else { 5104 final int offsetToCheck = isStartHandle() 5105 ? currentOffset : Math.max(currentOffset - 1, 0); 5106 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5107 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5108 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5109 } 5110 } 5111 } 5112 5113 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5114 final int trueLine = mTextView.getLineAtCoordinate(y); 5115 if (layout == null || prevLine > layout.getLineCount() 5116 || layout.getLineCount() <= 0 || prevLine < 0) { 5117 // Invalid parameters, just return whatever line is at y. 5118 return trueLine; 5119 } 5120 5121 if (Math.abs(trueLine - prevLine) >= 2) { 5122 // Only stick to lines if we're within a line of the previous selection. 5123 return trueLine; 5124 } 5125 5126 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5127 final int lineCount = layout.getLineCount(); 5128 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5129 5130 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5131 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5132 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5133 5134 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5135 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5136 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5137 5138 // Determine if we've moved lines based on y position and previous line. 5139 int currLine; 5140 if (y <= yTopBound) { 5141 currLine = Math.max(prevLine - 1, 0); 5142 } else if (y >= yBottomBound) { 5143 currLine = Math.min(prevLine + 1, lineCount - 1); 5144 } else { 5145 currLine = prevLine; 5146 } 5147 return currLine; 5148 } 5149 5150 /** 5151 * A CursorController instance can be used to control a cursor in the text. 5152 */ 5153 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5154 /** 5155 * Makes the cursor controller visible on screen. 5156 * See also {@link #hide()}. 5157 */ 5158 public void show(); 5159 5160 /** 5161 * Hide the cursor controller from screen. 5162 * See also {@link #show()}. 5163 */ 5164 public void hide(); 5165 5166 /** 5167 * Called when the view is detached from window. Perform house keeping task, such as 5168 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5169 * preventing the activity from being recycled. 5170 */ 5171 public void onDetached(); 5172 5173 public boolean isCursorBeingModified(); 5174 5175 public boolean isActive(); 5176 } 5177 5178 private class InsertionPointCursorController implements CursorController { 5179 private InsertionHandleView mHandle; 5180 5181 public void show() { 5182 getHandle().show(); 5183 5184 if (mSelectionModifierCursorController != null) { 5185 mSelectionModifierCursorController.hide(); 5186 } 5187 } 5188 5189 public void hide() { 5190 if (mHandle != null) { 5191 mHandle.hide(); 5192 } 5193 } 5194 5195 public void onTouchModeChanged(boolean isInTouchMode) { 5196 if (!isInTouchMode) { 5197 hide(); 5198 } 5199 } 5200 5201 private InsertionHandleView getHandle() { 5202 if (mSelectHandleCenter == null) { 5203 mSelectHandleCenter = mTextView.getContext().getDrawable( 5204 mTextView.mTextSelectHandleRes); 5205 } 5206 if (mHandle == null) { 5207 mHandle = new InsertionHandleView(mSelectHandleCenter); 5208 } 5209 return mHandle; 5210 } 5211 5212 @Override 5213 public void onDetached() { 5214 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5215 observer.removeOnTouchModeChangeListener(this); 5216 5217 if (mHandle != null) mHandle.onDetached(); 5218 } 5219 5220 @Override 5221 public boolean isCursorBeingModified() { 5222 return mHandle != null && mHandle.isDragging(); 5223 } 5224 5225 @Override 5226 public boolean isActive() { 5227 return mHandle != null && mHandle.isShowing(); 5228 } 5229 5230 public void invalidateHandle() { 5231 if (mHandle != null) { 5232 mHandle.invalidate(); 5233 } 5234 } 5235 } 5236 5237 class SelectionModifierCursorController implements CursorController { 5238 // The cursor controller handles, lazily created when shown. 5239 private SelectionHandleView mStartHandle; 5240 private SelectionHandleView mEndHandle; 5241 // The offsets of that last touch down event. Remembered to start selection there. 5242 private int mMinTouchOffset, mMaxTouchOffset; 5243 5244 private float mDownPositionX, mDownPositionY; 5245 private boolean mGestureStayedInTapRegion; 5246 5247 // Where the user first starts the drag motion. 5248 private int mStartOffset = -1; 5249 5250 private boolean mHaventMovedEnoughToStartDrag; 5251 // The line that a selection happened most recently with the drag accelerator. 5252 private int mLineSelectionIsOn = -1; 5253 // Whether the drag accelerator has selected past the initial line. 5254 private boolean mSwitchedLines = false; 5255 5256 // Indicates the drag accelerator mode that the user is currently using. 5257 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5258 // Drag accelerator is inactive. 5259 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5260 // Character based selection by dragging. Only for mouse. 5261 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5262 // Word based selection by dragging. Enabled after long pressing or double tapping. 5263 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5264 // Paragraph based selection by dragging. Enabled after mouse triple click. 5265 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5266 5267 SelectionModifierCursorController() { 5268 resetTouchOffsets(); 5269 } 5270 5271 public void show() { 5272 if (mTextView.isInBatchEditMode()) { 5273 return; 5274 } 5275 initDrawables(); 5276 initHandles(); 5277 } 5278 5279 private void initDrawables() { 5280 if (mSelectHandleLeft == null) { 5281 mSelectHandleLeft = mTextView.getContext().getDrawable( 5282 mTextView.mTextSelectHandleLeftRes); 5283 } 5284 if (mSelectHandleRight == null) { 5285 mSelectHandleRight = mTextView.getContext().getDrawable( 5286 mTextView.mTextSelectHandleRightRes); 5287 } 5288 } 5289 5290 private void initHandles() { 5291 // Lazy object creation has to be done before updatePosition() is called. 5292 if (mStartHandle == null) { 5293 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5294 com.android.internal.R.id.selection_start_handle, 5295 HANDLE_TYPE_SELECTION_START); 5296 } 5297 if (mEndHandle == null) { 5298 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5299 com.android.internal.R.id.selection_end_handle, 5300 HANDLE_TYPE_SELECTION_END); 5301 } 5302 5303 mStartHandle.show(); 5304 mEndHandle.show(); 5305 5306 hideInsertionPointCursorController(); 5307 } 5308 5309 public void hide() { 5310 if (mStartHandle != null) mStartHandle.hide(); 5311 if (mEndHandle != null) mEndHandle.hide(); 5312 } 5313 5314 public void enterDrag(int dragAcceleratorMode) { 5315 // Just need to init the handles / hide insertion cursor. 5316 show(); 5317 mDragAcceleratorMode = dragAcceleratorMode; 5318 // Start location of selection. 5319 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5320 mLastDownPositionY); 5321 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5322 // Don't show the handles until user has lifted finger. 5323 hide(); 5324 5325 // This stops scrolling parents from intercepting the touch event, allowing 5326 // the user to continue dragging across the screen to select text; TextView will 5327 // scroll as necessary. 5328 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5329 mTextView.cancelLongPress(); 5330 } 5331 5332 public void onTouchEvent(MotionEvent event) { 5333 // This is done even when the View does not have focus, so that long presses can start 5334 // selection and tap can move cursor from this tap position. 5335 final float eventX = event.getX(); 5336 final float eventY = event.getY(); 5337 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5338 switch (event.getActionMasked()) { 5339 case MotionEvent.ACTION_DOWN: 5340 if (extractedTextModeWillBeStarted()) { 5341 // Prevent duplicating the selection handles until the mode starts. 5342 hide(); 5343 } else { 5344 // Remember finger down position, to be able to start selection from there. 5345 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5346 eventX, eventY); 5347 5348 // Double tap detection 5349 if (mGestureStayedInTapRegion) { 5350 if (mTapState == TAP_STATE_DOUBLE_TAP 5351 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5352 final float deltaX = eventX - mDownPositionX; 5353 final float deltaY = eventY - mDownPositionY; 5354 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5355 5356 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5357 mTextView.getContext()); 5358 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5359 boolean stayedInArea = 5360 distanceSquared < doubleTapSlop * doubleTapSlop; 5361 5362 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5363 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5364 selectCurrentWordAndStartDrag(); 5365 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5366 selectCurrentParagraphAndStartDrag(); 5367 } 5368 mDiscardNextActionUp = true; 5369 } 5370 } 5371 } 5372 5373 mDownPositionX = eventX; 5374 mDownPositionY = eventY; 5375 mGestureStayedInTapRegion = true; 5376 mHaventMovedEnoughToStartDrag = true; 5377 } 5378 break; 5379 5380 case MotionEvent.ACTION_POINTER_DOWN: 5381 case MotionEvent.ACTION_POINTER_UP: 5382 // Handle multi-point gestures. Keep min and max offset positions. 5383 // Only activated for devices that correctly handle multi-touch. 5384 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5385 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5386 updateMinAndMaxOffsets(event); 5387 } 5388 break; 5389 5390 case MotionEvent.ACTION_MOVE: 5391 final ViewConfiguration viewConfig = ViewConfiguration.get( 5392 mTextView.getContext()); 5393 final int touchSlop = viewConfig.getScaledTouchSlop(); 5394 5395 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5396 final float deltaX = eventX - mDownPositionX; 5397 final float deltaY = eventY - mDownPositionY; 5398 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5399 5400 if (mGestureStayedInTapRegion) { 5401 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5402 mGestureStayedInTapRegion = 5403 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5404 } 5405 if (mHaventMovedEnoughToStartDrag) { 5406 // We don't start dragging until the user has moved enough. 5407 mHaventMovedEnoughToStartDrag = 5408 distanceSquared <= touchSlop * touchSlop; 5409 } 5410 } 5411 5412 if (isMouse && !isDragAcceleratorActive()) { 5413 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5414 if (mTextView.hasSelection() 5415 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5416 && offset >= mTextView.getSelectionStart() 5417 && offset <= mTextView.getSelectionEnd()) { 5418 startDragAndDrop(); 5419 break; 5420 } 5421 5422 if (mStartOffset != offset) { 5423 // Start character based drag accelerator. 5424 stopTextActionMode(); 5425 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5426 mDiscardNextActionUp = true; 5427 mHaventMovedEnoughToStartDrag = false; 5428 } 5429 } 5430 5431 if (mStartHandle != null && mStartHandle.isShowing()) { 5432 // Don't do the drag if the handles are showing already. 5433 break; 5434 } 5435 5436 updateSelection(event); 5437 break; 5438 5439 case MotionEvent.ACTION_UP: 5440 if (!isDragAcceleratorActive()) { 5441 break; 5442 } 5443 updateSelection(event); 5444 5445 // No longer dragging to select text, let the parent intercept events. 5446 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5447 5448 // No longer the first dragging motion, reset. 5449 resetDragAcceleratorState(); 5450 5451 if (mTextView.hasSelection()) { 5452 // Drag selection should not be adjusted by the text classifier. 5453 startSelectionActionModeAsync(mHaventMovedEnoughToStartDrag); 5454 } 5455 break; 5456 } 5457 } 5458 5459 private void updateSelection(MotionEvent event) { 5460 if (mTextView.getLayout() != null) { 5461 switch (mDragAcceleratorMode) { 5462 case DRAG_ACCELERATOR_MODE_CHARACTER: 5463 updateCharacterBasedSelection(event); 5464 break; 5465 case DRAG_ACCELERATOR_MODE_WORD: 5466 updateWordBasedSelection(event); 5467 break; 5468 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5469 updateParagraphBasedSelection(event); 5470 break; 5471 } 5472 } 5473 } 5474 5475 /** 5476 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5477 * 5478 * @return true if the drag was started. 5479 */ 5480 private boolean selectCurrentParagraphAndStartDrag() { 5481 if (mInsertionActionModeRunnable != null) { 5482 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5483 } 5484 stopTextActionMode(); 5485 if (!selectCurrentParagraph()) { 5486 return false; 5487 } 5488 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5489 return true; 5490 } 5491 5492 private void updateCharacterBasedSelection(MotionEvent event) { 5493 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5494 updateSelectionInternal(mStartOffset, offset, 5495 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5496 } 5497 5498 private void updateWordBasedSelection(MotionEvent event) { 5499 if (mHaventMovedEnoughToStartDrag) { 5500 return; 5501 } 5502 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5503 final ViewConfiguration viewConfig = ViewConfiguration.get( 5504 mTextView.getContext()); 5505 final float eventX = event.getX(); 5506 final float eventY = event.getY(); 5507 final int currLine; 5508 if (isMouse) { 5509 // No need to offset the y coordinate for mouse input. 5510 currLine = mTextView.getLineAtCoordinate(eventY); 5511 } else { 5512 float y = eventY; 5513 if (mSwitchedLines) { 5514 // Offset the finger by the same vertical offset as the handles. 5515 // This improves visibility of the content being selected by 5516 // shifting the finger below the content, this is applied once 5517 // the user has switched lines. 5518 final int touchSlop = viewConfig.getScaledTouchSlop(); 5519 final float fingerOffset = (mStartHandle != null) 5520 ? mStartHandle.getIdealVerticalOffset() 5521 : touchSlop; 5522 y = eventY - fingerOffset; 5523 } 5524 5525 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5526 y); 5527 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5528 // Break early here, we want to offset the finger position from 5529 // the selection highlight, once the user moved their finger 5530 // to a different line we should apply the offset and *not* switch 5531 // lines until recomputing the position with the finger offset. 5532 mSwitchedLines = true; 5533 return; 5534 } 5535 } 5536 5537 int startOffset; 5538 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5539 // Snap to word boundaries. 5540 if (mStartOffset < offset) { 5541 // Expanding with end handle. 5542 offset = getWordEnd(offset); 5543 startOffset = getWordStart(mStartOffset); 5544 } else { 5545 // Expanding with start handle. 5546 offset = getWordStart(offset); 5547 startOffset = getWordEnd(mStartOffset); 5548 if (startOffset == offset) { 5549 offset = getNextCursorOffset(offset, false); 5550 } 5551 } 5552 mLineSelectionIsOn = currLine; 5553 updateSelectionInternal(startOffset, offset, 5554 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5555 } 5556 5557 private void updateParagraphBasedSelection(MotionEvent event) { 5558 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5559 5560 final int start = Math.min(offset, mStartOffset); 5561 final int end = Math.max(offset, mStartOffset); 5562 final long paragraphsRange = getParagraphsRange(start, end); 5563 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5564 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5565 updateSelectionInternal(selectionStart, selectionEnd, 5566 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5567 } 5568 5569 private void updateSelectionInternal(int selectionStart, int selectionEnd, 5570 boolean fromTouchScreen) { 5571 final boolean performHapticFeedback = fromTouchScreen && mHapticTextHandleEnabled 5572 && ((mTextView.getSelectionStart() != selectionStart) 5573 || (mTextView.getSelectionEnd() != selectionEnd)); 5574 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5575 if (performHapticFeedback) { 5576 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 5577 } 5578 } 5579 5580 /** 5581 * @param event 5582 */ 5583 private void updateMinAndMaxOffsets(MotionEvent event) { 5584 int pointerCount = event.getPointerCount(); 5585 for (int index = 0; index < pointerCount; index++) { 5586 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5587 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5588 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5589 } 5590 } 5591 5592 public int getMinTouchOffset() { 5593 return mMinTouchOffset; 5594 } 5595 5596 public int getMaxTouchOffset() { 5597 return mMaxTouchOffset; 5598 } 5599 5600 public void resetTouchOffsets() { 5601 mMinTouchOffset = mMaxTouchOffset = -1; 5602 resetDragAcceleratorState(); 5603 } 5604 5605 private void resetDragAcceleratorState() { 5606 mStartOffset = -1; 5607 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5608 mSwitchedLines = false; 5609 final int selectionStart = mTextView.getSelectionStart(); 5610 final int selectionEnd = mTextView.getSelectionEnd(); 5611 if (selectionStart > selectionEnd) { 5612 Selection.setSelection((Spannable) mTextView.getText(), 5613 selectionEnd, selectionStart); 5614 } 5615 } 5616 5617 /** 5618 * @return true iff this controller is currently used to move the selection start. 5619 */ 5620 public boolean isSelectionStartDragged() { 5621 return mStartHandle != null && mStartHandle.isDragging(); 5622 } 5623 5624 @Override 5625 public boolean isCursorBeingModified() { 5626 return isDragAcceleratorActive() || isSelectionStartDragged() 5627 || (mEndHandle != null && mEndHandle.isDragging()); 5628 } 5629 5630 /** 5631 * @return true if the user is selecting text using the drag accelerator. 5632 */ 5633 public boolean isDragAcceleratorActive() { 5634 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5635 } 5636 5637 public void onTouchModeChanged(boolean isInTouchMode) { 5638 if (!isInTouchMode) { 5639 hide(); 5640 } 5641 } 5642 5643 @Override 5644 public void onDetached() { 5645 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5646 observer.removeOnTouchModeChangeListener(this); 5647 5648 if (mStartHandle != null) mStartHandle.onDetached(); 5649 if (mEndHandle != null) mEndHandle.onDetached(); 5650 } 5651 5652 @Override 5653 public boolean isActive() { 5654 return mStartHandle != null && mStartHandle.isShowing(); 5655 } 5656 5657 public void invalidateHandles() { 5658 if (mStartHandle != null) { 5659 mStartHandle.invalidate(); 5660 } 5661 if (mEndHandle != null) { 5662 mEndHandle.invalidate(); 5663 } 5664 } 5665 } 5666 5667 private class CorrectionHighlighter { 5668 private final Path mPath = new Path(); 5669 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5670 private int mStart, mEnd; 5671 private long mFadingStartTime; 5672 private RectF mTempRectF; 5673 private static final int FADE_OUT_DURATION = 400; 5674 5675 public CorrectionHighlighter() { 5676 mPaint.setCompatibilityScaling( 5677 mTextView.getResources().getCompatibilityInfo().applicationScale); 5678 mPaint.setStyle(Paint.Style.FILL); 5679 } 5680 5681 public void highlight(CorrectionInfo info) { 5682 mStart = info.getOffset(); 5683 mEnd = mStart + info.getNewText().length(); 5684 mFadingStartTime = SystemClock.uptimeMillis(); 5685 5686 if (mStart < 0 || mEnd < 0) { 5687 stopAnimation(); 5688 } 5689 } 5690 5691 public void draw(Canvas canvas, int cursorOffsetVertical) { 5692 if (updatePath() && updatePaint()) { 5693 if (cursorOffsetVertical != 0) { 5694 canvas.translate(0, cursorOffsetVertical); 5695 } 5696 5697 canvas.drawPath(mPath, mPaint); 5698 5699 if (cursorOffsetVertical != 0) { 5700 canvas.translate(0, -cursorOffsetVertical); 5701 } 5702 invalidate(true); // TODO invalidate cursor region only 5703 } else { 5704 stopAnimation(); 5705 invalidate(false); // TODO invalidate cursor region only 5706 } 5707 } 5708 5709 private boolean updatePaint() { 5710 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5711 if (duration > FADE_OUT_DURATION) return false; 5712 5713 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5714 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5715 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5716 + ((int) (highlightColorAlpha * coef) << 24); 5717 mPaint.setColor(color); 5718 return true; 5719 } 5720 5721 private boolean updatePath() { 5722 final Layout layout = mTextView.getLayout(); 5723 if (layout == null) return false; 5724 5725 // Update in case text is edited while the animation is run 5726 final int length = mTextView.getText().length(); 5727 int start = Math.min(length, mStart); 5728 int end = Math.min(length, mEnd); 5729 5730 mPath.reset(); 5731 layout.getSelectionPath(start, end, mPath); 5732 return true; 5733 } 5734 5735 private void invalidate(boolean delayed) { 5736 if (mTextView.getLayout() == null) return; 5737 5738 if (mTempRectF == null) mTempRectF = new RectF(); 5739 mPath.computeBounds(mTempRectF, false); 5740 5741 int left = mTextView.getCompoundPaddingLeft(); 5742 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5743 5744 if (delayed) { 5745 mTextView.postInvalidateOnAnimation( 5746 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5747 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5748 } else { 5749 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5750 (int) mTempRectF.right, (int) mTempRectF.bottom); 5751 } 5752 } 5753 5754 private void stopAnimation() { 5755 Editor.this.mCorrectionHighlighter = null; 5756 } 5757 } 5758 5759 private static class ErrorPopup extends PopupWindow { 5760 private boolean mAbove = false; 5761 private final TextView mView; 5762 private int mPopupInlineErrorBackgroundId = 0; 5763 private int mPopupInlineErrorAboveBackgroundId = 0; 5764 5765 ErrorPopup(TextView v, int width, int height) { 5766 super(v, width, height); 5767 mView = v; 5768 // Make sure the TextView has a background set as it will be used the first time it is 5769 // shown and positioned. Initialized with below background, which should have 5770 // dimensions identical to the above version for this to work (and is more likely). 5771 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5772 com.android.internal.R.styleable.Theme_errorMessageBackground); 5773 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5774 } 5775 5776 void fixDirection(boolean above) { 5777 mAbove = above; 5778 5779 if (above) { 5780 mPopupInlineErrorAboveBackgroundId = 5781 getResourceId(mPopupInlineErrorAboveBackgroundId, 5782 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5783 } else { 5784 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5785 com.android.internal.R.styleable.Theme_errorMessageBackground); 5786 } 5787 5788 mView.setBackgroundResource( 5789 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5790 } 5791 5792 private int getResourceId(int currentId, int index) { 5793 if (currentId == 0) { 5794 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5795 R.styleable.Theme); 5796 currentId = styledAttributes.getResourceId(index, 0); 5797 styledAttributes.recycle(); 5798 } 5799 return currentId; 5800 } 5801 5802 @Override 5803 public void update(int x, int y, int w, int h, boolean force) { 5804 super.update(x, y, w, h, force); 5805 5806 boolean above = isAboveAnchor(); 5807 if (above != mAbove) { 5808 fixDirection(above); 5809 } 5810 } 5811 } 5812 5813 static class InputContentType { 5814 int imeOptions = EditorInfo.IME_NULL; 5815 String privateImeOptions; 5816 CharSequence imeActionLabel; 5817 int imeActionId; 5818 Bundle extras; 5819 OnEditorActionListener onEditorActionListener; 5820 boolean enterDown; 5821 LocaleList imeHintLocales; 5822 } 5823 5824 static class InputMethodState { 5825 ExtractedTextRequest mExtractedTextRequest; 5826 final ExtractedText mExtractedText = new ExtractedText(); 5827 int mBatchEditNesting; 5828 boolean mCursorChanged; 5829 boolean mSelectionModeChanged; 5830 boolean mContentChanged; 5831 int mChangedStart, mChangedEnd, mChangedDelta; 5832 } 5833 5834 /** 5835 * @return True iff (start, end) is a valid range within the text. 5836 */ 5837 private static boolean isValidRange(CharSequence text, int start, int end) { 5838 return 0 <= start && start <= end && end <= text.length(); 5839 } 5840 5841 @VisibleForTesting 5842 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5843 return mSuggestionsPopupWindow; 5844 } 5845 5846 /** 5847 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5848 * text being typed (and hence always returns null from the filter() method). 5849 * 5850 * TODO: Make this span aware. 5851 */ 5852 public static class UndoInputFilter implements InputFilter { 5853 private final Editor mEditor; 5854 5855 // Whether the current filter pass is directly caused by an end-user text edit. 5856 private boolean mIsUserEdit; 5857 5858 // Whether the text field is handling an IME composition. Must be parceled in case the user 5859 // rotates the screen during composition. 5860 private boolean mHasComposition; 5861 5862 // Whether the user is expanding or shortening the text 5863 private boolean mExpanding; 5864 5865 // Whether the previous edit operation was in the current batch edit. 5866 private boolean mPreviousOperationWasInSameBatchEdit; 5867 5868 public UndoInputFilter(Editor editor) { 5869 mEditor = editor; 5870 } 5871 5872 public void saveInstanceState(Parcel parcel) { 5873 parcel.writeInt(mIsUserEdit ? 1 : 0); 5874 parcel.writeInt(mHasComposition ? 1 : 0); 5875 parcel.writeInt(mExpanding ? 1 : 0); 5876 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5877 } 5878 5879 public void restoreInstanceState(Parcel parcel) { 5880 mIsUserEdit = parcel.readInt() != 0; 5881 mHasComposition = parcel.readInt() != 0; 5882 mExpanding = parcel.readInt() != 0; 5883 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5884 } 5885 5886 /** 5887 * Signals that a user-triggered edit is starting. 5888 */ 5889 public void beginBatchEdit() { 5890 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5891 mIsUserEdit = true; 5892 } 5893 5894 public void endBatchEdit() { 5895 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5896 mIsUserEdit = false; 5897 mPreviousOperationWasInSameBatchEdit = false; 5898 } 5899 5900 @Override 5901 public CharSequence filter(CharSequence source, int start, int end, 5902 Spanned dest, int dstart, int dend) { 5903 if (DEBUG_UNDO) { 5904 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 5905 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5906 } 5907 5908 // Check to see if this edit should be tracked for undo. 5909 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5910 return null; 5911 } 5912 5913 final boolean hadComposition = mHasComposition; 5914 mHasComposition = isComposition(source); 5915 final boolean wasExpanding = mExpanding; 5916 boolean shouldCreateSeparateState = false; 5917 if ((end - start) != (dend - dstart)) { 5918 mExpanding = (end - start) > (dend - dstart); 5919 if (hadComposition && mExpanding != wasExpanding) { 5920 shouldCreateSeparateState = true; 5921 } 5922 } 5923 5924 // Handle edit. 5925 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5926 return null; 5927 } 5928 5929 void freezeLastEdit() { 5930 mEditor.mUndoManager.beginUpdate("Edit text"); 5931 EditOperation lastEdit = getLastEdit(); 5932 if (lastEdit != null) { 5933 lastEdit.mFrozen = true; 5934 } 5935 mEditor.mUndoManager.endUpdate(); 5936 } 5937 5938 @Retention(RetentionPolicy.SOURCE) 5939 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5940 private @interface MergeMode {} 5941 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5942 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5943 /** Use {@link EditOperation#mergeWith} to merge */ 5944 private static final int MERGE_EDIT_MODE_NORMAL = 2; 5945 5946 private void handleEdit(CharSequence source, int start, int end, 5947 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5948 // An application may install a TextWatcher to provide additional modifications after 5949 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5950 // string). This results in multiple filter() calls for what the user considers to be 5951 // a single operation. Always undo the whole set of changes in one step. 5952 @MergeMode 5953 final int mergeMode; 5954 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5955 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5956 } else if (shouldCreateSeparateState) { 5957 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5958 } else { 5959 mergeMode = MERGE_EDIT_MODE_NORMAL; 5960 } 5961 // Build a new operation with all the information from this edit. 5962 String newText = TextUtils.substring(source, start, end); 5963 String oldText = TextUtils.substring(dest, dstart, dend); 5964 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5965 mHasComposition); 5966 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5967 return; 5968 } 5969 recordEdit(edit, mergeMode); 5970 } 5971 5972 private EditOperation getLastEdit() { 5973 final UndoManager um = mEditor.mUndoManager; 5974 return um.getLastOperation( 5975 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5976 } 5977 /** 5978 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5979 * If forceMerge is true then the new edit is always merged. 5980 */ 5981 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5982 // Fetch the last edit operation and attempt to merge in the new edit. 5983 final UndoManager um = mEditor.mUndoManager; 5984 um.beginUpdate("Edit text"); 5985 EditOperation lastEdit = getLastEdit(); 5986 if (lastEdit == null) { 5987 // Add this as the first edit. 5988 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5989 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5990 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5991 // Forced merges take priority because they could be the result of a non-user-edit 5992 // change and this case should not create a new undo operation. 5993 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5994 lastEdit.forceMergeWith(edit); 5995 } else if (!mIsUserEdit) { 5996 // An application directly modified the Editable outside of a text edit. Treat this 5997 // as a new change and don't attempt to merge. 5998 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5999 um.commitState(mEditor.mUndoOwner); 6000 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6001 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 6002 // Merge succeeded, nothing else to do. 6003 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 6004 } else { 6005 // Could not merge with the last edit, so commit the last edit and add this edit. 6006 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 6007 um.commitState(mEditor.mUndoOwner); 6008 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6009 } 6010 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 6011 um.endUpdate(); 6012 } 6013 6014 private boolean canUndoEdit(CharSequence source, int start, int end, 6015 Spanned dest, int dstart, int dend) { 6016 if (!mEditor.mAllowUndo) { 6017 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 6018 return false; 6019 } 6020 6021 if (mEditor.mUndoManager.isInUndo()) { 6022 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 6023 return false; 6024 } 6025 6026 // Text filters run before input operations are applied. However, some input operations 6027 // are invalid and will throw exceptions when applied. This is common in tests. Don't 6028 // attempt to undo invalid operations. 6029 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 6030 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 6031 return false; 6032 } 6033 6034 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 6035 // on an input field. Skip no-op changes. 6036 if (start == end && dstart == dend) { 6037 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 6038 return false; 6039 } 6040 6041 return true; 6042 } 6043 6044 private static boolean isComposition(CharSequence source) { 6045 if (!(source instanceof Spannable)) { 6046 return false; 6047 } 6048 // This is a composition edit if the source has a non-zero-length composing span. 6049 Spannable text = (Spannable) source; 6050 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6051 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6052 return composeBegin < composeEnd; 6053 } 6054 6055 private boolean isInTextWatcher() { 6056 CharSequence text = mEditor.mTextView.getText(); 6057 return (text instanceof SpannableStringBuilder) 6058 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6059 } 6060 } 6061 6062 /** 6063 * An operation to undo a single "edit" to a text view. 6064 */ 6065 public static class EditOperation extends UndoOperation<Editor> { 6066 private static final int TYPE_INSERT = 0; 6067 private static final int TYPE_DELETE = 1; 6068 private static final int TYPE_REPLACE = 2; 6069 6070 private int mType; 6071 private String mOldText; 6072 private String mNewText; 6073 private int mStart; 6074 6075 private int mOldCursorPos; 6076 private int mNewCursorPos; 6077 private boolean mFrozen; 6078 private boolean mIsComposition; 6079 6080 /** 6081 * Constructs an edit operation from a text input operation on editor that replaces the 6082 * oldText starting at dstart with newText. 6083 */ 6084 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6085 boolean isComposition) { 6086 super(editor.mUndoOwner); 6087 mOldText = oldText; 6088 mNewText = newText; 6089 6090 // Determine the type of the edit. 6091 if (mNewText.length() > 0 && mOldText.length() == 0) { 6092 mType = TYPE_INSERT; 6093 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6094 mType = TYPE_DELETE; 6095 } else { 6096 mType = TYPE_REPLACE; 6097 } 6098 6099 mStart = dstart; 6100 // Store cursor data. 6101 mOldCursorPos = editor.mTextView.getSelectionStart(); 6102 mNewCursorPos = dstart + mNewText.length(); 6103 mIsComposition = isComposition; 6104 } 6105 6106 public EditOperation(Parcel src, ClassLoader loader) { 6107 super(src, loader); 6108 mType = src.readInt(); 6109 mOldText = src.readString(); 6110 mNewText = src.readString(); 6111 mStart = src.readInt(); 6112 mOldCursorPos = src.readInt(); 6113 mNewCursorPos = src.readInt(); 6114 mFrozen = src.readInt() == 1; 6115 mIsComposition = src.readInt() == 1; 6116 } 6117 6118 @Override 6119 public void writeToParcel(Parcel dest, int flags) { 6120 dest.writeInt(mType); 6121 dest.writeString(mOldText); 6122 dest.writeString(mNewText); 6123 dest.writeInt(mStart); 6124 dest.writeInt(mOldCursorPos); 6125 dest.writeInt(mNewCursorPos); 6126 dest.writeInt(mFrozen ? 1 : 0); 6127 dest.writeInt(mIsComposition ? 1 : 0); 6128 } 6129 6130 private int getNewTextEnd() { 6131 return mStart + mNewText.length(); 6132 } 6133 6134 private int getOldTextEnd() { 6135 return mStart + mOldText.length(); 6136 } 6137 6138 @Override 6139 public void commit() { 6140 } 6141 6142 @Override 6143 public void undo() { 6144 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6145 // Remove the new text and insert the old. 6146 Editor editor = getOwnerData(); 6147 Editable text = (Editable) editor.mTextView.getText(); 6148 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6149 } 6150 6151 @Override 6152 public void redo() { 6153 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6154 // Remove the old text and insert the new. 6155 Editor editor = getOwnerData(); 6156 Editable text = (Editable) editor.mTextView.getText(); 6157 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6158 } 6159 6160 /** 6161 * Attempts to merge this existing operation with a new edit. 6162 * @param edit The new edit operation. 6163 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6164 * object unchanged. 6165 */ 6166 private boolean mergeWith(EditOperation edit) { 6167 if (DEBUG_UNDO) { 6168 Log.d(TAG, "mergeWith old " + this); 6169 Log.d(TAG, "mergeWith new " + edit); 6170 } 6171 6172 if (mFrozen) { 6173 return false; 6174 } 6175 6176 switch (mType) { 6177 case TYPE_INSERT: 6178 return mergeInsertWith(edit); 6179 case TYPE_DELETE: 6180 return mergeDeleteWith(edit); 6181 case TYPE_REPLACE: 6182 return mergeReplaceWith(edit); 6183 default: 6184 return false; 6185 } 6186 } 6187 6188 private boolean mergeInsertWith(EditOperation edit) { 6189 if (edit.mType == TYPE_INSERT) { 6190 // Merge insertions that are contiguous even when it's frozen. 6191 if (getNewTextEnd() != edit.mStart) { 6192 return false; 6193 } 6194 mNewText += edit.mNewText; 6195 mNewCursorPos = edit.mNewCursorPos; 6196 mFrozen = edit.mFrozen; 6197 mIsComposition = edit.mIsComposition; 6198 return true; 6199 } 6200 if (mIsComposition && edit.mType == TYPE_REPLACE 6201 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6202 // Merge insertion with replace as they can be single insertion. 6203 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6204 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6205 mNewCursorPos = edit.mNewCursorPos; 6206 mIsComposition = edit.mIsComposition; 6207 return true; 6208 } 6209 return false; 6210 } 6211 6212 // TODO: Support forward delete. 6213 private boolean mergeDeleteWith(EditOperation edit) { 6214 // Only merge continuous deletes. 6215 if (edit.mType != TYPE_DELETE) { 6216 return false; 6217 } 6218 // Only merge deletions that are contiguous. 6219 if (mStart != edit.getOldTextEnd()) { 6220 return false; 6221 } 6222 mStart = edit.mStart; 6223 mOldText = edit.mOldText + mOldText; 6224 mNewCursorPos = edit.mNewCursorPos; 6225 mIsComposition = edit.mIsComposition; 6226 return true; 6227 } 6228 6229 private boolean mergeReplaceWith(EditOperation edit) { 6230 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6231 // Merge with adjacent insert. 6232 mNewText += edit.mNewText; 6233 mNewCursorPos = edit.mNewCursorPos; 6234 return true; 6235 } 6236 if (!mIsComposition) { 6237 return false; 6238 } 6239 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6240 && getNewTextEnd() >= edit.getOldTextEnd()) { 6241 // Merge with delete as they can be single operation. 6242 mNewText = mNewText.substring(0, edit.mStart - mStart) 6243 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6244 if (mNewText.isEmpty()) { 6245 mType = TYPE_DELETE; 6246 } 6247 mNewCursorPos = edit.mNewCursorPos; 6248 mIsComposition = edit.mIsComposition; 6249 return true; 6250 } 6251 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6252 && TextUtils.equals(mNewText, edit.mOldText)) { 6253 // Merge with the replace that replaces the same region. 6254 mNewText = edit.mNewText; 6255 mNewCursorPos = edit.mNewCursorPos; 6256 mIsComposition = edit.mIsComposition; 6257 return true; 6258 } 6259 return false; 6260 } 6261 6262 /** 6263 * Forcibly creates a single merged edit operation by simulating the entire text 6264 * contents being replaced. 6265 */ 6266 public void forceMergeWith(EditOperation edit) { 6267 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6268 if (mergeWith(edit)) { 6269 return; 6270 } 6271 Editor editor = getOwnerData(); 6272 6273 // Copy the text of the current field. 6274 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6275 // but would require two parallel implementations of modifyText() because Editable and 6276 // StringBuilder do not share an interface for replace/delete/insert. 6277 Editable editable = (Editable) editor.mTextView.getText(); 6278 Editable originalText = new SpannableStringBuilder(editable.toString()); 6279 6280 // Roll back the last operation. 6281 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6282 6283 // Clone the text again and apply the new operation. 6284 Editable finalText = new SpannableStringBuilder(editable.toString()); 6285 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6286 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6287 6288 // Convert this operation into a replace operation. 6289 mType = TYPE_REPLACE; 6290 mNewText = finalText.toString(); 6291 mOldText = originalText.toString(); 6292 mStart = 0; 6293 mNewCursorPos = edit.mNewCursorPos; 6294 mIsComposition = edit.mIsComposition; 6295 // mOldCursorPos is unchanged. 6296 } 6297 6298 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6299 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6300 // Apply the edit if it is still valid. 6301 if (isValidRange(text, deleteFrom, deleteTo) 6302 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6303 if (deleteFrom != deleteTo) { 6304 text.delete(deleteFrom, deleteTo); 6305 } 6306 if (newText.length() != 0) { 6307 text.insert(newTextInsertAt, newText); 6308 } 6309 } 6310 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6311 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6312 // TODO: Select all the text that was undone. 6313 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6314 Selection.setSelection(text, newCursorPos); 6315 } 6316 } 6317 6318 private String getTypeString() { 6319 switch (mType) { 6320 case TYPE_INSERT: 6321 return "insert"; 6322 case TYPE_DELETE: 6323 return "delete"; 6324 case TYPE_REPLACE: 6325 return "replace"; 6326 default: 6327 return ""; 6328 } 6329 } 6330 6331 @Override 6332 public String toString() { 6333 return "[mType=" + getTypeString() + ", " 6334 + "mOldText=" + mOldText + ", " 6335 + "mNewText=" + mNewText + ", " 6336 + "mStart=" + mStart + ", " 6337 + "mOldCursorPos=" + mOldCursorPos + ", " 6338 + "mNewCursorPos=" + mNewCursorPos + ", " 6339 + "mFrozen=" + mFrozen + ", " 6340 + "mIsComposition=" + mIsComposition + "]"; 6341 } 6342 6343 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6344 new Parcelable.ClassLoaderCreator<EditOperation>() { 6345 @Override 6346 public EditOperation createFromParcel(Parcel in) { 6347 return new EditOperation(in, null); 6348 } 6349 6350 @Override 6351 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6352 return new EditOperation(in, loader); 6353 } 6354 6355 @Override 6356 public EditOperation[] newArray(int size) { 6357 return new EditOperation[size]; 6358 } 6359 }; 6360 } 6361 6362 /** 6363 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6364 * These allow external applications to plug into currently selected text. 6365 */ 6366 static final class ProcessTextIntentActionsHandler { 6367 6368 private final Editor mEditor; 6369 private final TextView mTextView; 6370 private final Context mContext; 6371 private final PackageManager mPackageManager; 6372 private final String mPackageName; 6373 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6374 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6375 new SparseArray<>(); 6376 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6377 6378 private ProcessTextIntentActionsHandler(Editor editor) { 6379 mEditor = Preconditions.checkNotNull(editor); 6380 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6381 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6382 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6383 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6384 } 6385 6386 /** 6387 * Adds "PROCESS_TEXT" menu items to the specified menu. 6388 */ 6389 public void onInitializeMenu(Menu menu) { 6390 final int size = mSupportedActivities.size(); 6391 loadSupportedActivities(); 6392 for (int i = 0; i < size; i++) { 6393 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6394 menu.add(Menu.NONE, Menu.NONE, 6395 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6396 getLabel(resolveInfo)) 6397 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6398 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6399 } 6400 } 6401 6402 /** 6403 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6404 * menu item. 6405 * 6406 * @return True if the action was performed, false otherwise. 6407 */ 6408 public boolean performMenuItemAction(MenuItem item) { 6409 return fireIntent(item.getIntent()); 6410 } 6411 6412 /** 6413 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6414 */ 6415 public void initializeAccessibilityActions() { 6416 mAccessibilityIntents.clear(); 6417 mAccessibilityActions.clear(); 6418 int i = 0; 6419 loadSupportedActivities(); 6420 for (ResolveInfo resolveInfo : mSupportedActivities) { 6421 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6422 mAccessibilityActions.put( 6423 actionId, 6424 new AccessibilityNodeInfo.AccessibilityAction( 6425 actionId, getLabel(resolveInfo))); 6426 mAccessibilityIntents.put( 6427 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6428 } 6429 } 6430 6431 /** 6432 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6433 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6434 * latest accessibility actions available for this call. 6435 */ 6436 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6437 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6438 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6439 } 6440 } 6441 6442 /** 6443 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6444 * accessibility action id. 6445 * 6446 * @return True if the action was performed, false otherwise. 6447 */ 6448 public boolean performAccessibilityAction(int actionId) { 6449 return fireIntent(mAccessibilityIntents.get(actionId)); 6450 } 6451 6452 private boolean fireIntent(Intent intent) { 6453 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6454 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 6455 mEditor.mPreserveSelection = true; 6456 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6457 return true; 6458 } 6459 return false; 6460 } 6461 6462 private void loadSupportedActivities() { 6463 mSupportedActivities.clear(); 6464 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6465 List<ResolveInfo> unfiltered = 6466 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6467 for (ResolveInfo info : unfiltered) { 6468 if (isSupportedActivity(info)) { 6469 mSupportedActivities.add(info); 6470 } 6471 } 6472 } 6473 6474 private boolean isSupportedActivity(ResolveInfo info) { 6475 return mPackageName.equals(info.activityInfo.packageName) 6476 || info.activityInfo.exported 6477 && (info.activityInfo.permission == null 6478 || mContext.checkSelfPermission(info.activityInfo.permission) 6479 == PackageManager.PERMISSION_GRANTED); 6480 } 6481 6482 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6483 return createProcessTextIntent() 6484 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6485 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6486 } 6487 6488 private Intent createProcessTextIntent() { 6489 return new Intent() 6490 .setAction(Intent.ACTION_PROCESS_TEXT) 6491 .setType("text/plain"); 6492 } 6493 6494 private CharSequence getLabel(ResolveInfo resolveInfo) { 6495 return resolveInfo.loadLabel(mPackageManager); 6496 } 6497 } 6498} 6499