Editor.java revision 89bda32771d896a6c19c98d4aa41271cb9b0da43
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.os.Bundle; 45import android.os.LocaleList; 46import android.os.Parcel; 47import android.os.Parcelable; 48import android.os.ParcelableParcel; 49import android.os.SystemClock; 50import android.provider.Settings; 51import android.text.DynamicLayout; 52import android.text.Editable; 53import android.text.InputFilter; 54import android.text.InputType; 55import android.text.Layout; 56import android.text.ParcelableSpan; 57import android.text.Selection; 58import android.text.SpanWatcher; 59import android.text.Spannable; 60import android.text.SpannableStringBuilder; 61import android.text.Spanned; 62import android.text.StaticLayout; 63import android.text.TextUtils; 64import android.text.method.KeyListener; 65import android.text.method.MetaKeyKeyListener; 66import android.text.method.MovementMethod; 67import android.text.method.WordIterator; 68import android.text.style.EasyEditSpan; 69import android.text.style.SuggestionRangeSpan; 70import android.text.style.SuggestionSpan; 71import android.text.style.TextAppearanceSpan; 72import android.text.style.URLSpan; 73import android.util.ArraySet; 74import android.util.DisplayMetrics; 75import android.util.Log; 76import android.util.SparseArray; 77import android.view.ActionMode; 78import android.view.ActionMode.Callback; 79import android.view.ContextMenu; 80import android.view.ContextThemeWrapper; 81import android.view.DisplayListCanvas; 82import android.view.DragAndDropPermissions; 83import android.view.DragEvent; 84import android.view.Gravity; 85import android.view.HapticFeedbackConstants; 86import android.view.InputDevice; 87import android.view.LayoutInflater; 88import android.view.Menu; 89import android.view.MenuItem; 90import android.view.MotionEvent; 91import android.view.RenderNode; 92import android.view.SubMenu; 93import android.view.View; 94import android.view.View.DragShadowBuilder; 95import android.view.View.OnClickListener; 96import android.view.ViewConfiguration; 97import android.view.ViewGroup; 98import android.view.ViewGroup.LayoutParams; 99import android.view.ViewTreeObserver; 100import android.view.WindowManager; 101import android.view.accessibility.AccessibilityNodeInfo; 102import android.view.inputmethod.CorrectionInfo; 103import android.view.inputmethod.CursorAnchorInfo; 104import android.view.inputmethod.EditorInfo; 105import android.view.inputmethod.ExtractedText; 106import android.view.inputmethod.ExtractedTextRequest; 107import android.view.inputmethod.InputConnection; 108import android.view.inputmethod.InputMethodManager; 109import android.view.textclassifier.TextClassification; 110import android.widget.AdapterView.OnItemClickListener; 111import android.widget.TextView.Drawables; 112import android.widget.TextView.OnEditorActionListener; 113 114import com.android.internal.annotations.VisibleForTesting; 115import com.android.internal.logging.MetricsLogger; 116import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 117import com.android.internal.util.ArrayUtils; 118import com.android.internal.util.GrowingArrayUtils; 119import com.android.internal.util.Preconditions; 120import com.android.internal.widget.EditableInputConnection; 121 122import java.lang.annotation.Retention; 123import java.lang.annotation.RetentionPolicy; 124import java.text.BreakIterator; 125import java.util.ArrayList; 126import java.util.Arrays; 127import java.util.Comparator; 128import java.util.HashMap; 129import java.util.List; 130 131 132/** 133 * Helper class used by TextView to handle editable text views. 134 * 135 * @hide 136 */ 137public class Editor { 138 private static final String TAG = "Editor"; 139 private static final boolean DEBUG_UNDO = false; 140 141 static final int BLINK = 500; 142 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 143 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 144 private static final int UNSET_X_VALUE = -1; 145 private static final int UNSET_LINE = -1; 146 // Tag used when the Editor maintains its own separate UndoManager. 147 private static final String UNDO_OWNER_TAG = "Editor"; 148 149 // Ordering constants used to place the Action Mode or context menu items in their menu. 150 private static final int MENU_ITEM_ORDER_ASSIST = 0; 151 private static final int MENU_ITEM_ORDER_UNDO = 2; 152 private static final int MENU_ITEM_ORDER_REDO = 3; 153 private static final int MENU_ITEM_ORDER_CUT = 4; 154 private static final int MENU_ITEM_ORDER_COPY = 5; 155 private static final int MENU_ITEM_ORDER_PASTE = 6; 156 private static final int MENU_ITEM_ORDER_SHARE = 7; 157 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 158 private static final int MENU_ITEM_ORDER_REPLACE = 9; 159 private static final int MENU_ITEM_ORDER_AUTOFILL = 10; 160 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 11; 161 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 162 163 // Each Editor manages its own undo stack. 164 private final UndoManager mUndoManager = new UndoManager(); 165 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 166 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 167 boolean mAllowUndo = true; 168 169 private final MetricsLogger mMetricsLogger = new MetricsLogger(); 170 171 // Cursor Controllers. 172 private InsertionPointCursorController mInsertionPointCursorController; 173 SelectionModifierCursorController mSelectionModifierCursorController; 174 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 175 private ActionMode mTextActionMode; 176 private boolean mInsertionControllerEnabled; 177 private boolean mSelectionControllerEnabled; 178 179 private final boolean mHapticTextHandleEnabled; 180 181 // Used to highlight a word when it is corrected by the IME 182 private CorrectionHighlighter mCorrectionHighlighter; 183 184 InputContentType mInputContentType; 185 InputMethodState mInputMethodState; 186 187 private static class TextRenderNode { 188 // Render node has 3 recording states: 189 // 1. Recorded operations are valid. 190 // #needsRecord() returns false, but needsToBeShifted is false. 191 // 2. Recorded operations are not valid, but just the position needed to be updated. 192 // #needsRecord() returns false, but needsToBeShifted is true. 193 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 194 // true. 195 RenderNode renderNode; 196 boolean isDirty; 197 // Becomes true when recorded operations can be reused, but the position has to be updated. 198 boolean needsToBeShifted; 199 public TextRenderNode(String name) { 200 renderNode = RenderNode.create(name, null); 201 isDirty = true; 202 needsToBeShifted = true; 203 } 204 boolean needsRecord() { 205 return isDirty || !renderNode.isValid(); 206 } 207 } 208 private TextRenderNode[] mTextRenderNodes; 209 210 boolean mFrozenWithFocus; 211 boolean mSelectionMoved; 212 boolean mTouchFocusSelected; 213 214 KeyListener mKeyListener; 215 int mInputType = EditorInfo.TYPE_NULL; 216 217 boolean mDiscardNextActionUp; 218 boolean mIgnoreActionUpEvent; 219 220 long mShowCursor; 221 private Blink mBlink; 222 223 boolean mCursorVisible = true; 224 boolean mSelectAllOnFocus; 225 boolean mTextIsSelectable; 226 227 CharSequence mError; 228 boolean mErrorWasChanged; 229 private ErrorPopup mErrorPopup; 230 231 /** 232 * This flag is set if the TextView tries to display an error before it 233 * is attached to the window (so its position is still unknown). 234 * It causes the error to be shown later, when onAttachedToWindow() 235 * is called. 236 */ 237 private boolean mShowErrorAfterAttach; 238 239 boolean mInBatchEditControllers; 240 boolean mShowSoftInputOnFocus = true; 241 private boolean mPreserveSelection; 242 private boolean mRestartActionModeOnNextRefresh; 243 244 private SelectionActionModeHelper mSelectionActionModeHelper; 245 246 boolean mIsBeingLongClicked; 247 248 private SuggestionsPopupWindow mSuggestionsPopupWindow; 249 SuggestionRangeSpan mSuggestionRangeSpan; 250 private Runnable mShowSuggestionRunnable; 251 252 final Drawable[] mCursorDrawable = new Drawable[2]; 253 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 254 255 private Drawable mSelectHandleLeft; 256 private Drawable mSelectHandleRight; 257 private Drawable mSelectHandleCenter; 258 259 // Global listener that detects changes in the global position of the TextView 260 private PositionListener mPositionListener; 261 262 private float mLastDownPositionX, mLastDownPositionY; 263 private float mContextMenuAnchorX, mContextMenuAnchorY; 264 Callback mCustomSelectionActionModeCallback; 265 Callback mCustomInsertionActionModeCallback; 266 267 // Set when this TextView gained focus with some text selected. Will start selection mode. 268 boolean mCreatedWithASelection; 269 270 // Indicates the current tap state (first tap, double tap, or triple click). 271 private int mTapState = TAP_STATE_INITIAL; 272 private long mLastTouchUpTime = 0; 273 private static final int TAP_STATE_INITIAL = 0; 274 private static final int TAP_STATE_FIRST_TAP = 1; 275 private static final int TAP_STATE_DOUBLE_TAP = 2; 276 // Only for mouse input. 277 private static final int TAP_STATE_TRIPLE_CLICK = 3; 278 279 // The button state as of the last time #onTouchEvent is called. 280 private int mLastButtonState; 281 282 private Runnable mInsertionActionModeRunnable; 283 284 // The span controller helps monitoring the changes to which the Editor needs to react: 285 // - EasyEditSpans, for which we have some UI to display on attach and on hide 286 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 287 private SpanController mSpanController; 288 289 private WordIterator mWordIterator; 290 SpellChecker mSpellChecker; 291 292 // This word iterator is set with text and used to determine word boundaries 293 // when a user is selecting text. 294 private WordIterator mWordIteratorWithText; 295 // Indicate that the text in the word iterator needs to be updated. 296 private boolean mUpdateWordIteratorText; 297 298 private Rect mTempRect; 299 300 private final TextView mTextView; 301 302 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 303 304 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 305 new CursorAnchorInfoNotifier(); 306 307 private final Runnable mShowFloatingToolbar = new Runnable() { 308 @Override 309 public void run() { 310 if (mTextActionMode != null) { 311 mTextActionMode.hide(0); // hide off. 312 } 313 } 314 }; 315 316 boolean mIsInsertionActionModeStartPending = false; 317 318 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 319 320 Editor(TextView textView) { 321 mTextView = textView; 322 // Synchronize the filter list, which places the undo input filter at the end. 323 mTextView.setFilters(mTextView.getFilters()); 324 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 325 mHapticTextHandleEnabled = mTextView.getContext().getResources().getBoolean( 326 com.android.internal.R.bool.config_enableHapticTextHandle); 327 } 328 329 ParcelableParcel saveInstanceState() { 330 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 331 Parcel parcel = state.getParcel(); 332 mUndoManager.saveInstanceState(parcel); 333 mUndoInputFilter.saveInstanceState(parcel); 334 return state; 335 } 336 337 void restoreInstanceState(ParcelableParcel state) { 338 Parcel parcel = state.getParcel(); 339 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 340 mUndoInputFilter.restoreInstanceState(parcel); 341 // Re-associate this object as the owner of undo state. 342 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 343 } 344 345 /** 346 * Forgets all undo and redo operations for this Editor. 347 */ 348 void forgetUndoRedo() { 349 UndoOwner[] owners = { mUndoOwner }; 350 mUndoManager.forgetUndos(owners, -1 /* all */); 351 mUndoManager.forgetRedos(owners, -1 /* all */); 352 } 353 354 boolean canUndo() { 355 UndoOwner[] owners = { mUndoOwner }; 356 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 357 } 358 359 boolean canRedo() { 360 UndoOwner[] owners = { mUndoOwner }; 361 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 362 } 363 364 void undo() { 365 if (!mAllowUndo) { 366 return; 367 } 368 UndoOwner[] owners = { mUndoOwner }; 369 mUndoManager.undo(owners, 1); // Undo 1 action. 370 } 371 372 void redo() { 373 if (!mAllowUndo) { 374 return; 375 } 376 UndoOwner[] owners = { mUndoOwner }; 377 mUndoManager.redo(owners, 1); // Redo 1 action. 378 } 379 380 void replace() { 381 if (mSuggestionsPopupWindow == null) { 382 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 383 } 384 hideCursorAndSpanControllers(); 385 mSuggestionsPopupWindow.show(); 386 387 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 388 Selection.setSelection((Spannable) mTextView.getText(), middle); 389 } 390 391 void onAttachedToWindow() { 392 if (mShowErrorAfterAttach) { 393 showError(); 394 mShowErrorAfterAttach = false; 395 } 396 397 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 398 // No need to create the controller. 399 // The get method will add the listener on controller creation. 400 if (mInsertionPointCursorController != null) { 401 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 402 } 403 if (mSelectionModifierCursorController != null) { 404 mSelectionModifierCursorController.resetTouchOffsets(); 405 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 406 } 407 updateSpellCheckSpans(0, mTextView.getText().length(), 408 true /* create the spell checker if needed */); 409 410 if (mTextView.hasSelection()) { 411 refreshTextActionMode(); 412 } 413 414 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 415 resumeBlink(); 416 } 417 418 void onDetachedFromWindow() { 419 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 420 421 if (mError != null) { 422 hideError(); 423 } 424 425 suspendBlink(); 426 427 if (mInsertionPointCursorController != null) { 428 mInsertionPointCursorController.onDetached(); 429 } 430 431 if (mSelectionModifierCursorController != null) { 432 mSelectionModifierCursorController.onDetached(); 433 } 434 435 if (mShowSuggestionRunnable != null) { 436 mTextView.removeCallbacks(mShowSuggestionRunnable); 437 } 438 439 // Cancel the single tap delayed runnable. 440 if (mInsertionActionModeRunnable != null) { 441 mTextView.removeCallbacks(mInsertionActionModeRunnable); 442 } 443 444 mTextView.removeCallbacks(mShowFloatingToolbar); 445 446 discardTextDisplayLists(); 447 448 if (mSpellChecker != null) { 449 mSpellChecker.closeSession(); 450 // Forces the creation of a new SpellChecker next time this window is created. 451 // Will handle the cases where the settings has been changed in the meantime. 452 mSpellChecker = null; 453 } 454 455 hideCursorAndSpanControllers(); 456 stopTextActionModeWithPreservingSelection(); 457 } 458 459 private void discardTextDisplayLists() { 460 if (mTextRenderNodes != null) { 461 for (int i = 0; i < mTextRenderNodes.length; i++) { 462 RenderNode displayList = mTextRenderNodes[i] != null 463 ? mTextRenderNodes[i].renderNode : null; 464 if (displayList != null && displayList.isValid()) { 465 displayList.discardDisplayList(); 466 } 467 } 468 } 469 } 470 471 private void showError() { 472 if (mTextView.getWindowToken() == null) { 473 mShowErrorAfterAttach = true; 474 return; 475 } 476 477 if (mErrorPopup == null) { 478 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 479 final TextView err = (TextView) inflater.inflate( 480 com.android.internal.R.layout.textview_hint, null); 481 482 final float scale = mTextView.getResources().getDisplayMetrics().density; 483 mErrorPopup = 484 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 485 mErrorPopup.setFocusable(false); 486 // The user is entering text, so the input method is needed. We 487 // don't want the popup to be displayed on top of it. 488 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 489 } 490 491 TextView tv = (TextView) mErrorPopup.getContentView(); 492 chooseSize(mErrorPopup, mError, tv); 493 tv.setText(mError); 494 495 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 496 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 497 } 498 499 public void setError(CharSequence error, Drawable icon) { 500 mError = TextUtils.stringOrSpannedString(error); 501 mErrorWasChanged = true; 502 503 if (mError == null) { 504 setErrorIcon(null); 505 if (mErrorPopup != null) { 506 if (mErrorPopup.isShowing()) { 507 mErrorPopup.dismiss(); 508 } 509 510 mErrorPopup = null; 511 } 512 mShowErrorAfterAttach = false; 513 } else { 514 setErrorIcon(icon); 515 if (mTextView.isFocused()) { 516 showError(); 517 } 518 } 519 } 520 521 private void setErrorIcon(Drawable icon) { 522 Drawables dr = mTextView.mDrawables; 523 if (dr == null) { 524 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 525 } 526 dr.setErrorDrawable(icon, mTextView); 527 528 mTextView.resetResolvedDrawables(); 529 mTextView.invalidate(); 530 mTextView.requestLayout(); 531 } 532 533 private void hideError() { 534 if (mErrorPopup != null) { 535 if (mErrorPopup.isShowing()) { 536 mErrorPopup.dismiss(); 537 } 538 } 539 540 mShowErrorAfterAttach = false; 541 } 542 543 /** 544 * Returns the X offset to make the pointy top of the error point 545 * at the middle of the error icon. 546 */ 547 private int getErrorX() { 548 /* 549 * The "25" is the distance between the point and the right edge 550 * of the background 551 */ 552 final float scale = mTextView.getResources().getDisplayMetrics().density; 553 554 final Drawables dr = mTextView.mDrawables; 555 556 final int layoutDirection = mTextView.getLayoutDirection(); 557 int errorX; 558 int offset; 559 switch (layoutDirection) { 560 default: 561 case View.LAYOUT_DIRECTION_LTR: 562 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 563 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 564 - mTextView.getPaddingRight() + offset; 565 break; 566 case View.LAYOUT_DIRECTION_RTL: 567 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 568 errorX = mTextView.getPaddingLeft() + offset; 569 break; 570 } 571 return errorX; 572 } 573 574 /** 575 * Returns the Y offset to make the pointy top of the error point 576 * at the bottom of the error icon. 577 */ 578 private int getErrorY() { 579 /* 580 * Compound, not extended, because the icon is not clipped 581 * if the text height is smaller. 582 */ 583 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 584 int vspace = mTextView.getBottom() - mTextView.getTop() 585 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 586 587 final Drawables dr = mTextView.mDrawables; 588 589 final int layoutDirection = mTextView.getLayoutDirection(); 590 int height; 591 switch (layoutDirection) { 592 default: 593 case View.LAYOUT_DIRECTION_LTR: 594 height = (dr != null ? dr.mDrawableHeightRight : 0); 595 break; 596 case View.LAYOUT_DIRECTION_RTL: 597 height = (dr != null ? dr.mDrawableHeightLeft : 0); 598 break; 599 } 600 601 int icontop = compoundPaddingTop + (vspace - height) / 2; 602 603 /* 604 * The "2" is the distance between the point and the top edge 605 * of the background. 606 */ 607 final float scale = mTextView.getResources().getDisplayMetrics().density; 608 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 609 } 610 611 void createInputContentTypeIfNeeded() { 612 if (mInputContentType == null) { 613 mInputContentType = new InputContentType(); 614 } 615 } 616 617 void createInputMethodStateIfNeeded() { 618 if (mInputMethodState == null) { 619 mInputMethodState = new InputMethodState(); 620 } 621 } 622 623 boolean isCursorVisible() { 624 // The default value is true, even when there is no associated Editor 625 return mCursorVisible && mTextView.isTextEditable(); 626 } 627 628 void prepareCursorControllers() { 629 boolean windowSupportsHandles = false; 630 631 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 632 if (params instanceof WindowManager.LayoutParams) { 633 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 634 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 635 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 636 } 637 638 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 639 mInsertionControllerEnabled = enabled && isCursorVisible(); 640 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 641 642 if (!mInsertionControllerEnabled) { 643 hideInsertionPointCursorController(); 644 if (mInsertionPointCursorController != null) { 645 mInsertionPointCursorController.onDetached(); 646 mInsertionPointCursorController = null; 647 } 648 } 649 650 if (!mSelectionControllerEnabled) { 651 stopTextActionMode(); 652 if (mSelectionModifierCursorController != null) { 653 mSelectionModifierCursorController.onDetached(); 654 mSelectionModifierCursorController = null; 655 } 656 } 657 } 658 659 void hideInsertionPointCursorController() { 660 if (mInsertionPointCursorController != null) { 661 mInsertionPointCursorController.hide(); 662 } 663 } 664 665 /** 666 * Hides the insertion and span controllers. 667 */ 668 void hideCursorAndSpanControllers() { 669 hideCursorControllers(); 670 hideSpanControllers(); 671 } 672 673 private void hideSpanControllers() { 674 if (mSpanController != null) { 675 mSpanController.hide(); 676 } 677 } 678 679 private void hideCursorControllers() { 680 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 681 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 682 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 683 // to distinguish one from the other. 684 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 685 || !mSuggestionsPopupWindow.isShowingUp())) { 686 // Should be done before hide insertion point controller since it triggers a show of it 687 mSuggestionsPopupWindow.hide(); 688 } 689 hideInsertionPointCursorController(); 690 } 691 692 /** 693 * Create new SpellCheckSpans on the modified region. 694 */ 695 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 696 // Remove spans whose adjacent characters are text not punctuation 697 mTextView.removeAdjacentSuggestionSpans(start); 698 mTextView.removeAdjacentSuggestionSpans(end); 699 700 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 701 && !(mTextView.isInExtractedMode())) { 702 if (mSpellChecker == null && createSpellChecker) { 703 mSpellChecker = new SpellChecker(mTextView); 704 } 705 if (mSpellChecker != null) { 706 mSpellChecker.spellCheck(start, end); 707 } 708 } 709 } 710 711 void onScreenStateChanged(int screenState) { 712 switch (screenState) { 713 case View.SCREEN_STATE_ON: 714 resumeBlink(); 715 break; 716 case View.SCREEN_STATE_OFF: 717 suspendBlink(); 718 break; 719 } 720 } 721 722 private void suspendBlink() { 723 if (mBlink != null) { 724 mBlink.cancel(); 725 } 726 } 727 728 private void resumeBlink() { 729 if (mBlink != null) { 730 mBlink.uncancel(); 731 makeBlink(); 732 } 733 } 734 735 void adjustInputType(boolean password, boolean passwordInputType, 736 boolean webPasswordInputType, boolean numberPasswordInputType) { 737 // mInputType has been set from inputType, possibly modified by mInputMethod. 738 // Specialize mInputType to [web]password if we have a text class and the original input 739 // type was a password. 740 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 741 if (password || passwordInputType) { 742 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 743 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 744 } 745 if (webPasswordInputType) { 746 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 747 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 748 } 749 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 750 if (numberPasswordInputType) { 751 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 752 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 753 } 754 } 755 } 756 757 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 758 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 759 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 760 761 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 762 com.android.internal.R.dimen.textview_error_popup_default_width); 763 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 764 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 765 float max = 0; 766 for (int i = 0; i < l.getLineCount(); i++) { 767 max = Math.max(max, l.getLineWidth(i)); 768 } 769 770 /* 771 * Now set the popup size to be big enough for the text plus the border capped 772 * to DEFAULT_MAX_POPUP_WIDTH 773 */ 774 pop.setWidth(wid + (int) Math.ceil(max)); 775 pop.setHeight(ht + l.getHeight()); 776 } 777 778 void setFrame() { 779 if (mErrorPopup != null) { 780 TextView tv = (TextView) mErrorPopup.getContentView(); 781 chooseSize(mErrorPopup, mError, tv); 782 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 783 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 784 } 785 } 786 787 private int getWordStart(int offset) { 788 // FIXME - For this and similar methods we're not doing anything to check if there's 789 // a LocaleSpan in the text, this may be something we should try handling or checking for. 790 int retOffset = getWordIteratorWithText().prevBoundary(offset); 791 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 792 // On punctuation boundary or within group of punctuation, find punctuation start. 793 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 794 } else { 795 // Not on a punctuation boundary, find the word start. 796 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 797 } 798 if (retOffset == BreakIterator.DONE) { 799 return offset; 800 } 801 return retOffset; 802 } 803 804 private int getWordEnd(int offset) { 805 int retOffset = getWordIteratorWithText().nextBoundary(offset); 806 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 807 // On punctuation boundary or within group of punctuation, find punctuation end. 808 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 809 } else { 810 // Not on a punctuation boundary, find the word end. 811 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 812 } 813 if (retOffset == BreakIterator.DONE) { 814 return offset; 815 } 816 return retOffset; 817 } 818 819 private boolean needsToSelectAllToSelectWordOrParagraph() { 820 if (mTextView.hasPasswordTransformationMethod()) { 821 // Always select all on a password field. 822 // Cut/copy menu entries are not available for passwords, but being able to select all 823 // is however useful to delete or paste to replace the entire content. 824 return true; 825 } 826 827 int inputType = mTextView.getInputType(); 828 int klass = inputType & InputType.TYPE_MASK_CLASS; 829 int variation = inputType & InputType.TYPE_MASK_VARIATION; 830 831 // Specific text field types: select the entire text for these 832 if (klass == InputType.TYPE_CLASS_NUMBER 833 || klass == InputType.TYPE_CLASS_PHONE 834 || klass == InputType.TYPE_CLASS_DATETIME 835 || variation == InputType.TYPE_TEXT_VARIATION_URI 836 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 837 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 838 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 839 return true; 840 } 841 return false; 842 } 843 844 /** 845 * Adjusts selection to the word under last touch offset. Return true if the operation was 846 * successfully performed. 847 */ 848 boolean selectCurrentWord() { 849 if (!mTextView.canSelectText()) { 850 return false; 851 } 852 853 if (needsToSelectAllToSelectWordOrParagraph()) { 854 return mTextView.selectAllText(); 855 } 856 857 long lastTouchOffsets = getLastTouchOffsets(); 858 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 859 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 860 861 // Safety check in case standard touch event handling has been bypassed 862 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 863 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 864 865 int selectionStart, selectionEnd; 866 867 // If a URLSpan (web address, email, phone...) is found at that position, select it. 868 URLSpan[] urlSpans = 869 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 870 if (urlSpans.length >= 1) { 871 URLSpan urlSpan = urlSpans[0]; 872 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 873 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 874 } else { 875 // FIXME - We should check if there's a LocaleSpan in the text, this may be 876 // something we should try handling or checking for. 877 final WordIterator wordIterator = getWordIterator(); 878 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 879 880 selectionStart = wordIterator.getBeginning(minOffset); 881 selectionEnd = wordIterator.getEnd(maxOffset); 882 883 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 884 || selectionStart == selectionEnd) { 885 // Possible when the word iterator does not properly handle the text's language 886 long range = getCharClusterRange(minOffset); 887 selectionStart = TextUtils.unpackRangeStartFromLong(range); 888 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 889 } 890 } 891 892 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 893 return selectionEnd > selectionStart; 894 } 895 896 /** 897 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 898 * successfully performed. 899 */ 900 private boolean selectCurrentParagraph() { 901 if (!mTextView.canSelectText()) { 902 return false; 903 } 904 905 if (needsToSelectAllToSelectWordOrParagraph()) { 906 return mTextView.selectAllText(); 907 } 908 909 long lastTouchOffsets = getLastTouchOffsets(); 910 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 911 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 912 913 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 914 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 915 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 916 if (start < end) { 917 Selection.setSelection((Spannable) mTextView.getText(), start, end); 918 return true; 919 } 920 return false; 921 } 922 923 /** 924 * Get the minimum range of paragraphs that contains startOffset and endOffset. 925 */ 926 private long getParagraphsRange(int startOffset, int endOffset) { 927 final Layout layout = mTextView.getLayout(); 928 if (layout == null) { 929 return TextUtils.packRangeInLong(-1, -1); 930 } 931 final CharSequence text = mTextView.getText(); 932 int minLine = layout.getLineForOffset(startOffset); 933 // Search paragraph start. 934 while (minLine > 0) { 935 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 936 if (text.charAt(prevLineEndOffset - 1) == '\n') { 937 break; 938 } 939 minLine--; 940 } 941 int maxLine = layout.getLineForOffset(endOffset); 942 // Search paragraph end. 943 while (maxLine < layout.getLineCount() - 1) { 944 final int lineEndOffset = layout.getLineEnd(maxLine); 945 if (text.charAt(lineEndOffset - 1) == '\n') { 946 break; 947 } 948 maxLine++; 949 } 950 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 951 } 952 953 void onLocaleChanged() { 954 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 955 // proper new locale 956 mWordIterator = null; 957 mWordIteratorWithText = null; 958 } 959 960 public WordIterator getWordIterator() { 961 if (mWordIterator == null) { 962 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 963 } 964 return mWordIterator; 965 } 966 967 private WordIterator getWordIteratorWithText() { 968 if (mWordIteratorWithText == null) { 969 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 970 mUpdateWordIteratorText = true; 971 } 972 if (mUpdateWordIteratorText) { 973 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 974 // to the user's selection is needed. A possible solution would be to 975 // copy some number N of characters near the selection and then when the 976 // user approaches N then we'd do another copy of the next N characters. 977 CharSequence text = mTextView.getText(); 978 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 979 mUpdateWordIteratorText = false; 980 } 981 return mWordIteratorWithText; 982 } 983 984 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 985 final Layout layout = mTextView.getLayout(); 986 if (layout == null) return offset; 987 return findAfterGivenOffset == layout.isRtlCharAt(offset) 988 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 989 } 990 991 private long getCharClusterRange(int offset) { 992 final int textLength = mTextView.getText().length(); 993 if (offset < textLength) { 994 final int clusterEndOffset = getNextCursorOffset(offset, true); 995 return TextUtils.packRangeInLong( 996 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 997 } 998 if (offset - 1 >= 0) { 999 final int clusterStartOffset = getNextCursorOffset(offset, false); 1000 return TextUtils.packRangeInLong(clusterStartOffset, 1001 getNextCursorOffset(clusterStartOffset, true)); 1002 } 1003 return TextUtils.packRangeInLong(offset, offset); 1004 } 1005 1006 private boolean touchPositionIsInSelection() { 1007 int selectionStart = mTextView.getSelectionStart(); 1008 int selectionEnd = mTextView.getSelectionEnd(); 1009 1010 if (selectionStart == selectionEnd) { 1011 return false; 1012 } 1013 1014 if (selectionStart > selectionEnd) { 1015 int tmp = selectionStart; 1016 selectionStart = selectionEnd; 1017 selectionEnd = tmp; 1018 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1019 } 1020 1021 SelectionModifierCursorController selectionController = getSelectionController(); 1022 int minOffset = selectionController.getMinTouchOffset(); 1023 int maxOffset = selectionController.getMaxTouchOffset(); 1024 1025 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1026 } 1027 1028 private PositionListener getPositionListener() { 1029 if (mPositionListener == null) { 1030 mPositionListener = new PositionListener(); 1031 } 1032 return mPositionListener; 1033 } 1034 1035 private interface TextViewPositionListener { 1036 public void updatePosition(int parentPositionX, int parentPositionY, 1037 boolean parentPositionChanged, boolean parentScrolled); 1038 } 1039 1040 private boolean isOffsetVisible(int offset) { 1041 Layout layout = mTextView.getLayout(); 1042 if (layout == null) return false; 1043 1044 final int line = layout.getLineForOffset(offset); 1045 final int lineBottom = layout.getLineBottom(line); 1046 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1047 return mTextView.isPositionVisible( 1048 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1049 lineBottom + mTextView.viewportToContentVerticalOffset()); 1050 } 1051 1052 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1053 * in the view. Returns false when the position is in the empty space of left/right of text. 1054 */ 1055 private boolean isPositionOnText(float x, float y) { 1056 Layout layout = mTextView.getLayout(); 1057 if (layout == null) return false; 1058 1059 final int line = mTextView.getLineAtCoordinate(y); 1060 x = mTextView.convertToLocalHorizontalCoordinate(x); 1061 1062 if (x < layout.getLineLeft(line)) return false; 1063 if (x > layout.getLineRight(line)) return false; 1064 return true; 1065 } 1066 1067 private void startDragAndDrop() { 1068 getSelectionActionModeHelper().onSelectionDrag(); 1069 1070 // TODO: Fix drag and drop in full screen extracted mode. 1071 if (mTextView.isInExtractedMode()) { 1072 return; 1073 } 1074 final int start = mTextView.getSelectionStart(); 1075 final int end = mTextView.getSelectionEnd(); 1076 CharSequence selectedText = mTextView.getTransformedText(start, end); 1077 ClipData data = ClipData.newPlainText(null, selectedText); 1078 DragLocalState localState = new DragLocalState(mTextView, start, end); 1079 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1080 View.DRAG_FLAG_GLOBAL); 1081 stopTextActionMode(); 1082 if (hasSelectionController()) { 1083 getSelectionController().resetTouchOffsets(); 1084 } 1085 } 1086 1087 public boolean performLongClick(boolean handled) { 1088 // Long press in empty space moves cursor and starts the insertion action mode. 1089 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1090 && mInsertionControllerEnabled) { 1091 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1092 mLastDownPositionY); 1093 Selection.setSelection((Spannable) mTextView.getText(), offset); 1094 getInsertionController().show(); 1095 mIsInsertionActionModeStartPending = true; 1096 handled = true; 1097 MetricsLogger.action( 1098 mTextView.getContext(), 1099 MetricsEvent.TEXT_LONGPRESS, 1100 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1101 } 1102 1103 if (!handled && mTextActionMode != null) { 1104 if (touchPositionIsInSelection()) { 1105 startDragAndDrop(); 1106 MetricsLogger.action( 1107 mTextView.getContext(), 1108 MetricsEvent.TEXT_LONGPRESS, 1109 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1110 } else { 1111 stopTextActionMode(); 1112 selectCurrentWordAndStartDrag(); 1113 MetricsLogger.action( 1114 mTextView.getContext(), 1115 MetricsEvent.TEXT_LONGPRESS, 1116 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1117 } 1118 handled = true; 1119 } 1120 1121 // Start a new selection 1122 if (!handled) { 1123 handled = selectCurrentWordAndStartDrag(); 1124 if (handled) { 1125 MetricsLogger.action( 1126 mTextView.getContext(), 1127 MetricsEvent.TEXT_LONGPRESS, 1128 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1129 } 1130 } 1131 1132 return handled; 1133 } 1134 1135 private long getLastTouchOffsets() { 1136 SelectionModifierCursorController selectionController = getSelectionController(); 1137 final int minOffset = selectionController.getMinTouchOffset(); 1138 final int maxOffset = selectionController.getMaxTouchOffset(); 1139 return TextUtils.packRangeInLong(minOffset, maxOffset); 1140 } 1141 1142 void onFocusChanged(boolean focused, int direction) { 1143 mShowCursor = SystemClock.uptimeMillis(); 1144 ensureEndedBatchEdit(); 1145 1146 if (focused) { 1147 int selStart = mTextView.getSelectionStart(); 1148 int selEnd = mTextView.getSelectionEnd(); 1149 1150 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1151 // mode for these, unless there was a specific selection already started. 1152 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1153 && selEnd == mTextView.getText().length(); 1154 1155 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1156 && !isFocusHighlighted; 1157 1158 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1159 // If a tap was used to give focus to that view, move cursor at tap position. 1160 // Has to be done before onTakeFocus, which can be overloaded. 1161 final int lastTapPosition = getLastTapPosition(); 1162 if (lastTapPosition >= 0) { 1163 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1164 } 1165 1166 // Note this may have to be moved out of the Editor class 1167 MovementMethod mMovement = mTextView.getMovementMethod(); 1168 if (mMovement != null) { 1169 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1170 } 1171 1172 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1173 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1174 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1175 // This special case ensure that we keep current selection in that case. 1176 // It would be better to know why the DecorView does not have focus at that time. 1177 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1178 && selStart >= 0 && selEnd >= 0) { 1179 /* 1180 * Someone intentionally set the selection, so let them 1181 * do whatever it is that they wanted to do instead of 1182 * the default on-focus behavior. We reset the selection 1183 * here instead of just skipping the onTakeFocus() call 1184 * because some movement methods do something other than 1185 * just setting the selection in theirs and we still 1186 * need to go through that path. 1187 */ 1188 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1189 } 1190 1191 if (mSelectAllOnFocus) { 1192 mTextView.selectAllText(); 1193 } 1194 1195 mTouchFocusSelected = true; 1196 } 1197 1198 mFrozenWithFocus = false; 1199 mSelectionMoved = false; 1200 1201 if (mError != null) { 1202 showError(); 1203 } 1204 1205 makeBlink(); 1206 } else { 1207 if (mError != null) { 1208 hideError(); 1209 } 1210 // Don't leave us in the middle of a batch edit. 1211 mTextView.onEndBatchEdit(); 1212 1213 if (mTextView.isInExtractedMode()) { 1214 hideCursorAndSpanControllers(); 1215 stopTextActionModeWithPreservingSelection(); 1216 } else { 1217 hideCursorAndSpanControllers(); 1218 if (mTextView.isTemporarilyDetached()) { 1219 stopTextActionModeWithPreservingSelection(); 1220 } else { 1221 stopTextActionMode(); 1222 } 1223 downgradeEasyCorrectionSpans(); 1224 } 1225 // No need to create the controller 1226 if (mSelectionModifierCursorController != null) { 1227 mSelectionModifierCursorController.resetTouchOffsets(); 1228 } 1229 } 1230 } 1231 1232 /** 1233 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1234 * span. 1235 */ 1236 private void downgradeEasyCorrectionSpans() { 1237 CharSequence text = mTextView.getText(); 1238 if (text instanceof Spannable) { 1239 Spannable spannable = (Spannable) text; 1240 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1241 spannable.length(), SuggestionSpan.class); 1242 for (int i = 0; i < suggestionSpans.length; i++) { 1243 int flags = suggestionSpans[i].getFlags(); 1244 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1245 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1246 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1247 suggestionSpans[i].setFlags(flags); 1248 } 1249 } 1250 } 1251 } 1252 1253 void sendOnTextChanged(int start, int before, int after) { 1254 getSelectionActionModeHelper().onTextChanged(start, start + before); 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 } 3925 } 3926 3927 private boolean canAssist() { 3928 final TextClassification textClassification = 3929 getSelectionActionModeHelper().getTextClassification(); 3930 return mTextView.isDeviceProvisioned() 3931 && textClassification != null 3932 && (textClassification.getIcon() != null 3933 || !TextUtils.isEmpty(textClassification.getLabel())) 3934 && (textClassification.getOnClickListener() != null 3935 || (textClassification.getIntent() != null 3936 && mTextView.getContext().canStartActivityForResult())); 3937 } 3938 3939 @Override 3940 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3941 getSelectionActionModeHelper().onSelectionAction(item.getItemId()); 3942 3943 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3944 return true; 3945 } 3946 Callback customCallback = getCustomCallback(); 3947 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3948 return true; 3949 } 3950 final TextClassification textClassification = 3951 getSelectionActionModeHelper().getTextClassification(); 3952 if (TextView.ID_ASSIST == item.getItemId() && textClassification != null) { 3953 final OnClickListener onClickListener = 3954 textClassification.getOnClickListener(); 3955 if (onClickListener != null) { 3956 onClickListener.onClick(mTextView); 3957 } else { 3958 final Intent intent = textClassification.getIntent(); 3959 if (intent != null) { 3960 TextClassification.createStartActivityOnClickListener( 3961 mTextView.getContext(), intent) 3962 .onClick(mTextView); 3963 } 3964 } 3965 stopTextActionMode(); 3966 return true; 3967 } 3968 return mTextView.onTextContextMenuItem(item.getItemId()); 3969 } 3970 3971 @Override 3972 public void onDestroyActionMode(ActionMode mode) { 3973 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3974 getSelectionActionModeHelper().onDestroyActionMode(); 3975 mTextActionMode = null; 3976 Callback customCallback = getCustomCallback(); 3977 if (customCallback != null) { 3978 customCallback.onDestroyActionMode(mode); 3979 } 3980 3981 if (!mPreserveSelection) { 3982 /* 3983 * Leave current selection when we tentatively destroy action mode for the 3984 * selection. If we're detaching from a window, we'll bring back the selection 3985 * mode when (if) we get reattached. 3986 */ 3987 Selection.setSelection((Spannable) mTextView.getText(), 3988 mTextView.getSelectionEnd()); 3989 } 3990 3991 if (mSelectionModifierCursorController != null) { 3992 mSelectionModifierCursorController.hide(); 3993 } 3994 } 3995 3996 @Override 3997 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3998 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3999 super.onGetContentRect(mode, view, outRect); 4000 return; 4001 } 4002 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 4003 // We have a selection. 4004 mSelectionPath.reset(); 4005 mTextView.getLayout().getSelectionPath( 4006 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 4007 mSelectionPath.computeBounds(mSelectionBounds, true); 4008 mSelectionBounds.bottom += mHandleHeight; 4009 } else if (mCursorCount == 2) { 4010 // We have a split cursor. In this case, we take the rectangle that includes both 4011 // parts of the cursor to ensure we don't obscure either of them. 4012 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 4013 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 4014 mSelectionBounds.set( 4015 Math.min(firstCursorBounds.left, secondCursorBounds.left), 4016 Math.min(firstCursorBounds.top, secondCursorBounds.top), 4017 Math.max(firstCursorBounds.right, secondCursorBounds.right), 4018 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 4019 + mHandleHeight); 4020 } else { 4021 // We have a single cursor. 4022 Layout layout = mTextView.getLayout(); 4023 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 4024 float primaryHorizontal = clampHorizontalPosition(null, 4025 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 4026 mSelectionBounds.set( 4027 primaryHorizontal, 4028 layout.getLineTop(line), 4029 primaryHorizontal, 4030 layout.getLineTop(line + 1) + mHandleHeight); 4031 } 4032 // Take TextView's padding and scroll into account. 4033 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4034 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4035 outRect.set( 4036 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4037 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4038 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4039 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4040 } 4041 } 4042 4043 /** 4044 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4045 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4046 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4047 */ 4048 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4049 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4050 final int[] mTmpIntOffset = new int[2]; 4051 final Matrix mViewToScreenMatrix = new Matrix(); 4052 4053 @Override 4054 public void updatePosition(int parentPositionX, int parentPositionY, 4055 boolean parentPositionChanged, boolean parentScrolled) { 4056 final InputMethodState ims = mInputMethodState; 4057 if (ims == null || ims.mBatchEditNesting > 0) { 4058 return; 4059 } 4060 final InputMethodManager imm = InputMethodManager.peekInstance(); 4061 if (null == imm) { 4062 return; 4063 } 4064 if (!imm.isActive(mTextView)) { 4065 return; 4066 } 4067 // Skip if the IME has not requested the cursor/anchor position. 4068 if (!imm.isCursorAnchorInfoEnabled()) { 4069 return; 4070 } 4071 Layout layout = mTextView.getLayout(); 4072 if (layout == null) { 4073 return; 4074 } 4075 4076 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4077 builder.reset(); 4078 4079 final int selectionStart = mTextView.getSelectionStart(); 4080 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4081 4082 // Construct transformation matrix from view local coordinates to screen coordinates. 4083 mViewToScreenMatrix.set(mTextView.getMatrix()); 4084 mTextView.getLocationOnScreen(mTmpIntOffset); 4085 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4086 builder.setMatrix(mViewToScreenMatrix); 4087 4088 final float viewportToContentHorizontalOffset = 4089 mTextView.viewportToContentHorizontalOffset(); 4090 final float viewportToContentVerticalOffset = 4091 mTextView.viewportToContentVerticalOffset(); 4092 4093 final CharSequence text = mTextView.getText(); 4094 if (text instanceof Spannable) { 4095 final Spannable sp = (Spannable) text; 4096 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4097 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4098 if (composingTextEnd < composingTextStart) { 4099 final int temp = composingTextEnd; 4100 composingTextEnd = composingTextStart; 4101 composingTextStart = temp; 4102 } 4103 final boolean hasComposingText = 4104 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4105 if (hasComposingText) { 4106 final CharSequence composingText = text.subSequence(composingTextStart, 4107 composingTextEnd); 4108 builder.setComposingText(composingTextStart, composingText); 4109 mTextView.populateCharacterBounds(builder, composingTextStart, 4110 composingTextEnd, viewportToContentHorizontalOffset, 4111 viewportToContentVerticalOffset); 4112 } 4113 } 4114 4115 // Treat selectionStart as the insertion point. 4116 if (0 <= selectionStart) { 4117 final int offset = selectionStart; 4118 final int line = layout.getLineForOffset(offset); 4119 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4120 + viewportToContentHorizontalOffset; 4121 final float insertionMarkerTop = layout.getLineTop(line) 4122 + viewportToContentVerticalOffset; 4123 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4124 + viewportToContentVerticalOffset; 4125 final float insertionMarkerBottom = layout.getLineBottom(line) 4126 + viewportToContentVerticalOffset; 4127 final boolean isTopVisible = mTextView 4128 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4129 final boolean isBottomVisible = mTextView 4130 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4131 int insertionMarkerFlags = 0; 4132 if (isTopVisible || isBottomVisible) { 4133 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4134 } 4135 if (!isTopVisible || !isBottomVisible) { 4136 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4137 } 4138 if (layout.isRtlCharAt(offset)) { 4139 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4140 } 4141 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4142 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4143 } 4144 4145 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4146 } 4147 } 4148 4149 @VisibleForTesting 4150 public abstract class HandleView extends View implements TextViewPositionListener { 4151 protected Drawable mDrawable; 4152 protected Drawable mDrawableLtr; 4153 protected Drawable mDrawableRtl; 4154 private final PopupWindow mContainer; 4155 // Position with respect to the parent TextView 4156 private int mPositionX, mPositionY; 4157 private boolean mIsDragging; 4158 // Offset from touch position to mPosition 4159 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4160 protected int mHotspotX; 4161 protected int mHorizontalGravity; 4162 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4163 private float mTouchOffsetY; 4164 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4165 private float mIdealVerticalOffset; 4166 // Parent's (TextView) previous position in window 4167 private int mLastParentX, mLastParentY; 4168 // Parent's (TextView) previous position on screen 4169 private int mLastParentXOnScreen, mLastParentYOnScreen; 4170 // Previous text character offset 4171 protected int mPreviousOffset = -1; 4172 // Previous text character offset 4173 private boolean mPositionHasChanged = true; 4174 // Minimum touch target size for handles 4175 private int mMinSize; 4176 // Indicates the line of text that the handle is on. 4177 protected int mPrevLine = UNSET_LINE; 4178 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4179 // when selecting text when the handles jump to the end / start of words which may be on 4180 // a different line. 4181 protected int mPreviousLineTouched = UNSET_LINE; 4182 4183 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4184 super(mTextView.getContext()); 4185 setId(id); 4186 mContainer = new PopupWindow(mTextView.getContext(), null, 4187 com.android.internal.R.attr.textSelectHandleWindowStyle); 4188 mContainer.setSplitTouchEnabled(true); 4189 mContainer.setClippingEnabled(false); 4190 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4191 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4192 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4193 mContainer.setContentView(this); 4194 4195 mDrawableLtr = drawableLtr; 4196 mDrawableRtl = drawableRtl; 4197 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4198 com.android.internal.R.dimen.text_handle_min_size); 4199 4200 updateDrawable(); 4201 4202 final int handleHeight = getPreferredHeight(); 4203 mTouchOffsetY = -0.3f * handleHeight; 4204 mIdealVerticalOffset = 0.7f * handleHeight; 4205 } 4206 4207 public float getIdealVerticalOffset() { 4208 return mIdealVerticalOffset; 4209 } 4210 4211 protected void updateDrawable() { 4212 if (mIsDragging) { 4213 // Don't update drawable during dragging. 4214 return; 4215 } 4216 final Layout layout = mTextView.getLayout(); 4217 if (layout == null) { 4218 return; 4219 } 4220 final int offset = getCurrentCursorOffset(); 4221 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4222 final Drawable oldDrawable = mDrawable; 4223 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4224 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4225 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4226 if (oldDrawable != mDrawable && isShowing()) { 4227 // Update popup window position. 4228 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4229 - getHorizontalOffset() + getCursorOffset(); 4230 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4231 mPositionHasChanged = true; 4232 updatePosition(mLastParentX, mLastParentY, false, false); 4233 postInvalidate(); 4234 } 4235 } 4236 4237 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4238 protected abstract int getHorizontalGravity(boolean isRtlRun); 4239 4240 // Touch-up filter: number of previous positions remembered 4241 private static final int HISTORY_SIZE = 5; 4242 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4243 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4244 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4245 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4246 private int mPreviousOffsetIndex = 0; 4247 private int mNumberPreviousOffsets = 0; 4248 4249 private void startTouchUpFilter(int offset) { 4250 mNumberPreviousOffsets = 0; 4251 addPositionToTouchUpFilter(offset); 4252 } 4253 4254 private void addPositionToTouchUpFilter(int offset) { 4255 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4256 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4257 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4258 mNumberPreviousOffsets++; 4259 } 4260 4261 private void filterOnTouchUp(boolean fromTouchScreen) { 4262 final long now = SystemClock.uptimeMillis(); 4263 int i = 0; 4264 int index = mPreviousOffsetIndex; 4265 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4266 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4267 i++; 4268 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4269 } 4270 4271 if (i > 0 && i < iMax 4272 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4273 positionAtCursorOffset(mPreviousOffsets[index], false, fromTouchScreen); 4274 } 4275 } 4276 4277 public boolean offsetHasBeenChanged() { 4278 return mNumberPreviousOffsets > 1; 4279 } 4280 4281 @Override 4282 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4283 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4284 } 4285 4286 @Override 4287 public void invalidate() { 4288 super.invalidate(); 4289 if (isShowing()) { 4290 positionAtCursorOffset(getCurrentCursorOffset(), true, false); 4291 } 4292 }; 4293 4294 private int getPreferredWidth() { 4295 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4296 } 4297 4298 private int getPreferredHeight() { 4299 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4300 } 4301 4302 public void show() { 4303 if (isShowing()) return; 4304 4305 getPositionListener().addSubscriber(this, true /* local position may change */); 4306 4307 // Make sure the offset is always considered new, even when focusing at same position 4308 mPreviousOffset = -1; 4309 positionAtCursorOffset(getCurrentCursorOffset(), false, false); 4310 } 4311 4312 protected void dismiss() { 4313 mIsDragging = false; 4314 mContainer.dismiss(); 4315 onDetached(); 4316 } 4317 4318 public void hide() { 4319 dismiss(); 4320 4321 getPositionListener().removeSubscriber(this); 4322 } 4323 4324 public boolean isShowing() { 4325 return mContainer.isShowing(); 4326 } 4327 4328 private boolean isVisible() { 4329 // Always show a dragging handle. 4330 if (mIsDragging) { 4331 return true; 4332 } 4333 4334 if (mTextView.isInBatchEditMode()) { 4335 return false; 4336 } 4337 4338 return mTextView.isPositionVisible( 4339 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4340 } 4341 4342 public abstract int getCurrentCursorOffset(); 4343 4344 protected abstract void updateSelection(int offset); 4345 4346 protected abstract void updatePosition(float x, float y, boolean fromTouchScreen); 4347 4348 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4349 return layout.isRtlCharAt(offset); 4350 } 4351 4352 @VisibleForTesting 4353 public float getHorizontal(@NonNull Layout layout, int offset) { 4354 return layout.getPrimaryHorizontal(offset); 4355 } 4356 4357 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4358 return mTextView.getOffsetAtCoordinate(line, x); 4359 } 4360 4361 /** 4362 * @param offset Cursor offset. Must be in [-1, length]. 4363 * @param forceUpdatePosition whether to force update the position. This should be true 4364 * when If the parent has been scrolled, for example. 4365 * @param fromTouchScreen {@code true} if the cursor is moved with motion events from the 4366 * touch screen. 4367 */ 4368 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4369 boolean fromTouchScreen) { 4370 // A HandleView relies on the layout, which may be nulled by external methods 4371 Layout layout = mTextView.getLayout(); 4372 if (layout == null) { 4373 // Will update controllers' state, hiding them and stopping selection mode if needed 4374 prepareCursorControllers(); 4375 return; 4376 } 4377 layout = mTextView.getLayout(); 4378 4379 boolean offsetChanged = offset != mPreviousOffset; 4380 if (offsetChanged || forceUpdatePosition) { 4381 if (offsetChanged) { 4382 updateSelection(offset); 4383 if (fromTouchScreen && mHapticTextHandleEnabled) { 4384 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 4385 } 4386 addPositionToTouchUpFilter(offset); 4387 } 4388 final int line = layout.getLineForOffset(offset); 4389 mPrevLine = line; 4390 4391 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4392 - getHorizontalOffset() + getCursorOffset(); 4393 mPositionY = layout.getLineBottom(line); 4394 4395 // Take TextView's padding and scroll into account. 4396 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4397 mPositionY += mTextView.viewportToContentVerticalOffset(); 4398 4399 mPreviousOffset = offset; 4400 mPositionHasChanged = true; 4401 } 4402 } 4403 4404 /** 4405 * Return the clamped horizontal position for the first cursor. 4406 * 4407 * @param layout Text layout. 4408 * @param offset Character offset for the cursor. 4409 * @return The clamped horizontal position for the cursor. 4410 */ 4411 int getCursorHorizontalPosition(Layout layout, int offset) { 4412 return (int) (getHorizontal(layout, offset) - 0.5f); 4413 } 4414 4415 @Override 4416 public void updatePosition(int parentPositionX, int parentPositionY, 4417 boolean parentPositionChanged, boolean parentScrolled) { 4418 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled, false); 4419 if (parentPositionChanged || mPositionHasChanged) { 4420 if (mIsDragging) { 4421 // Update touchToWindow offset in case of parent scrolling while dragging 4422 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4423 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4424 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4425 mLastParentX = parentPositionX; 4426 mLastParentY = parentPositionY; 4427 } 4428 4429 onHandleMoved(); 4430 } 4431 4432 if (isVisible()) { 4433 // Transform to the window coordinates to follow the view tranformation. 4434 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4435 mTextView.transformFromViewToWindowSpace(pts); 4436 pts[0] -= mHotspotX + getHorizontalOffset(); 4437 4438 if (isShowing()) { 4439 mContainer.update(pts[0], pts[1], -1, -1); 4440 } else { 4441 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4442 } 4443 } else { 4444 if (isShowing()) { 4445 dismiss(); 4446 } 4447 } 4448 4449 mPositionHasChanged = false; 4450 } 4451 } 4452 4453 @Override 4454 protected void onDraw(Canvas c) { 4455 final int drawWidth = mDrawable.getIntrinsicWidth(); 4456 final int left = getHorizontalOffset(); 4457 4458 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4459 mDrawable.draw(c); 4460 } 4461 4462 private int getHorizontalOffset() { 4463 final int width = getPreferredWidth(); 4464 final int drawWidth = mDrawable.getIntrinsicWidth(); 4465 final int left; 4466 switch (mHorizontalGravity) { 4467 case Gravity.LEFT: 4468 left = 0; 4469 break; 4470 default: 4471 case Gravity.CENTER: 4472 left = (width - drawWidth) / 2; 4473 break; 4474 case Gravity.RIGHT: 4475 left = width - drawWidth; 4476 break; 4477 } 4478 return left; 4479 } 4480 4481 protected int getCursorOffset() { 4482 return 0; 4483 } 4484 4485 @Override 4486 public boolean onTouchEvent(MotionEvent ev) { 4487 updateFloatingToolbarVisibility(ev); 4488 4489 switch (ev.getActionMasked()) { 4490 case MotionEvent.ACTION_DOWN: { 4491 startTouchUpFilter(getCurrentCursorOffset()); 4492 4493 final PositionListener positionListener = getPositionListener(); 4494 mLastParentX = positionListener.getPositionX(); 4495 mLastParentY = positionListener.getPositionY(); 4496 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4497 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4498 4499 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4500 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4501 mTouchToWindowOffsetX = xInWindow - mPositionX; 4502 mTouchToWindowOffsetY = yInWindow - mPositionY; 4503 4504 mIsDragging = true; 4505 mPreviousLineTouched = UNSET_LINE; 4506 break; 4507 } 4508 4509 case MotionEvent.ACTION_MOVE: { 4510 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4511 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4512 4513 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4514 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4515 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4516 float newVerticalOffset; 4517 if (previousVerticalOffset < mIdealVerticalOffset) { 4518 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4519 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4520 } else { 4521 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4522 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4523 } 4524 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4525 4526 final float newPosX = 4527 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4528 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4529 4530 updatePosition(newPosX, newPosY, 4531 ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4532 break; 4533 } 4534 4535 case MotionEvent.ACTION_UP: 4536 filterOnTouchUp(ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4537 mIsDragging = false; 4538 updateDrawable(); 4539 break; 4540 4541 case MotionEvent.ACTION_CANCEL: 4542 mIsDragging = false; 4543 updateDrawable(); 4544 break; 4545 } 4546 return true; 4547 } 4548 4549 public boolean isDragging() { 4550 return mIsDragging; 4551 } 4552 4553 void onHandleMoved() {} 4554 4555 public void onDetached() {} 4556 } 4557 4558 private class InsertionHandleView extends HandleView { 4559 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4560 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4561 4562 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4563 private float mDownPositionX, mDownPositionY; 4564 private Runnable mHider; 4565 4566 public InsertionHandleView(Drawable drawable) { 4567 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4568 } 4569 4570 @Override 4571 public void show() { 4572 super.show(); 4573 4574 final long durationSinceCutOrCopy = 4575 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4576 4577 // Cancel the single tap delayed runnable. 4578 if (mInsertionActionModeRunnable != null 4579 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4580 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4581 || isCursorInsideEasyCorrectionSpan())) { 4582 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4583 } 4584 4585 // Prepare and schedule the single tap runnable to run exactly after the double tap 4586 // timeout has passed. 4587 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4588 && !isCursorInsideEasyCorrectionSpan() 4589 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4590 if (mTextActionMode == null) { 4591 if (mInsertionActionModeRunnable == null) { 4592 mInsertionActionModeRunnable = new Runnable() { 4593 @Override 4594 public void run() { 4595 startInsertionActionMode(); 4596 } 4597 }; 4598 } 4599 mTextView.postDelayed( 4600 mInsertionActionModeRunnable, 4601 ViewConfiguration.getDoubleTapTimeout() + 1); 4602 } 4603 4604 } 4605 4606 hideAfterDelay(); 4607 } 4608 4609 private void hideAfterDelay() { 4610 if (mHider == null) { 4611 mHider = new Runnable() { 4612 public void run() { 4613 hide(); 4614 } 4615 }; 4616 } else { 4617 removeHiderCallback(); 4618 } 4619 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4620 } 4621 4622 private void removeHiderCallback() { 4623 if (mHider != null) { 4624 mTextView.removeCallbacks(mHider); 4625 } 4626 } 4627 4628 @Override 4629 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4630 return drawable.getIntrinsicWidth() / 2; 4631 } 4632 4633 @Override 4634 protected int getHorizontalGravity(boolean isRtlRun) { 4635 return Gravity.CENTER_HORIZONTAL; 4636 } 4637 4638 @Override 4639 protected int getCursorOffset() { 4640 int offset = super.getCursorOffset(); 4641 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4642 if (cursor != null) { 4643 cursor.getPadding(mTempRect); 4644 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4645 } 4646 return offset; 4647 } 4648 4649 @Override 4650 int getCursorHorizontalPosition(Layout layout, int offset) { 4651 final Drawable drawable = mCursorCount > 0 ? mCursorDrawable[0] : null; 4652 if (drawable != null) { 4653 final float horizontal = getHorizontal(layout, offset); 4654 return clampHorizontalPosition(drawable, horizontal) + mTempRect.left; 4655 } 4656 return super.getCursorHorizontalPosition(layout, offset); 4657 } 4658 4659 @Override 4660 public boolean onTouchEvent(MotionEvent ev) { 4661 final boolean result = super.onTouchEvent(ev); 4662 4663 switch (ev.getActionMasked()) { 4664 case MotionEvent.ACTION_DOWN: 4665 mDownPositionX = ev.getRawX(); 4666 mDownPositionY = ev.getRawY(); 4667 break; 4668 4669 case MotionEvent.ACTION_UP: 4670 if (!offsetHasBeenChanged()) { 4671 final float deltaX = mDownPositionX - ev.getRawX(); 4672 final float deltaY = mDownPositionY - ev.getRawY(); 4673 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4674 4675 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4676 mTextView.getContext()); 4677 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4678 4679 if (distanceSquared < touchSlop * touchSlop) { 4680 // Tapping on the handle toggles the insertion action mode. 4681 if (mTextActionMode != null) { 4682 stopTextActionMode(); 4683 } else { 4684 startInsertionActionMode(); 4685 } 4686 } 4687 } else { 4688 if (mTextActionMode != null) { 4689 mTextActionMode.invalidateContentRect(); 4690 } 4691 } 4692 hideAfterDelay(); 4693 break; 4694 4695 case MotionEvent.ACTION_CANCEL: 4696 hideAfterDelay(); 4697 break; 4698 4699 default: 4700 break; 4701 } 4702 4703 return result; 4704 } 4705 4706 @Override 4707 public int getCurrentCursorOffset() { 4708 return mTextView.getSelectionStart(); 4709 } 4710 4711 @Override 4712 public void updateSelection(int offset) { 4713 Selection.setSelection((Spannable) mTextView.getText(), offset); 4714 } 4715 4716 @Override 4717 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4718 Layout layout = mTextView.getLayout(); 4719 int offset; 4720 if (layout != null) { 4721 if (mPreviousLineTouched == UNSET_LINE) { 4722 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4723 } 4724 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4725 offset = getOffsetAtCoordinate(layout, currLine, x); 4726 mPreviousLineTouched = currLine; 4727 } else { 4728 offset = -1; 4729 } 4730 positionAtCursorOffset(offset, false, fromTouchScreen); 4731 if (mTextActionMode != null) { 4732 invalidateActionMode(); 4733 } 4734 } 4735 4736 @Override 4737 void onHandleMoved() { 4738 super.onHandleMoved(); 4739 removeHiderCallback(); 4740 } 4741 4742 @Override 4743 public void onDetached() { 4744 super.onDetached(); 4745 removeHiderCallback(); 4746 } 4747 } 4748 4749 @Retention(RetentionPolicy.SOURCE) 4750 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4751 public @interface HandleType {} 4752 public static final int HANDLE_TYPE_SELECTION_START = 0; 4753 public static final int HANDLE_TYPE_SELECTION_END = 1; 4754 4755 private class SelectionHandleView extends HandleView { 4756 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4757 // end (HANDLE_TYPE_SELECTION_END). 4758 @HandleType 4759 private final int mHandleType; 4760 // Indicates whether the cursor is making adjustments within a word. 4761 private boolean mInWord = false; 4762 // Difference between touch position and word boundary position. 4763 private float mTouchWordDelta; 4764 // X value of the previous updatePosition call. 4765 private float mPrevX; 4766 // Indicates if the handle has moved a boundary between LTR and RTL text. 4767 private boolean mLanguageDirectionChanged = false; 4768 // Distance from edge of horizontally scrolling text view 4769 // to use to switch to character mode. 4770 private final float mTextViewEdgeSlop; 4771 // Used to save text view location. 4772 private final int[] mTextViewLocation = new int[2]; 4773 4774 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4775 @HandleType int handleType) { 4776 super(drawableLtr, drawableRtl, id); 4777 mHandleType = handleType; 4778 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4779 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4780 } 4781 4782 private boolean isStartHandle() { 4783 return mHandleType == HANDLE_TYPE_SELECTION_START; 4784 } 4785 4786 @Override 4787 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4788 if (isRtlRun == isStartHandle()) { 4789 return drawable.getIntrinsicWidth() / 4; 4790 } else { 4791 return (drawable.getIntrinsicWidth() * 3) / 4; 4792 } 4793 } 4794 4795 @Override 4796 protected int getHorizontalGravity(boolean isRtlRun) { 4797 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4798 } 4799 4800 @Override 4801 public int getCurrentCursorOffset() { 4802 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4803 } 4804 4805 @Override 4806 protected void updateSelection(int offset) { 4807 if (isStartHandle()) { 4808 Selection.setSelection((Spannable) mTextView.getText(), offset, 4809 mTextView.getSelectionEnd()); 4810 } else { 4811 Selection.setSelection((Spannable) mTextView.getText(), 4812 mTextView.getSelectionStart(), offset); 4813 } 4814 updateDrawable(); 4815 if (mTextActionMode != null) { 4816 invalidateActionMode(); 4817 } 4818 } 4819 4820 @Override 4821 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4822 final Layout layout = mTextView.getLayout(); 4823 if (layout == null) { 4824 // HandleView will deal appropriately in positionAtCursorOffset when 4825 // layout is null. 4826 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y), 4827 fromTouchScreen); 4828 return; 4829 } 4830 4831 if (mPreviousLineTouched == UNSET_LINE) { 4832 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4833 } 4834 4835 boolean positionCursor = false; 4836 final int anotherHandleOffset = 4837 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4838 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4839 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4840 4841 if (isStartHandle() && initialOffset >= anotherHandleOffset 4842 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4843 // Handles have crossed, bound it to the first selected line and 4844 // adjust by word / char as normal. 4845 currLine = layout.getLineForOffset(anotherHandleOffset); 4846 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4847 } 4848 4849 int offset = initialOffset; 4850 final int wordEnd = getWordEnd(offset); 4851 final int wordStart = getWordStart(offset); 4852 4853 if (mPrevX == UNSET_X_VALUE) { 4854 mPrevX = x; 4855 } 4856 4857 final int currentOffset = getCurrentCursorOffset(); 4858 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4859 final boolean atRtl = isAtRtlRun(layout, offset); 4860 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4861 4862 // We can't determine if the user is expanding or shrinking the selection if they're 4863 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4864 // the cursor at the current position. 4865 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4866 // We're on a boundary or this is the first direction change -- just update 4867 // to the current position. 4868 mLanguageDirectionChanged = true; 4869 mTouchWordDelta = 0.0f; 4870 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4871 return; 4872 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4873 // We've just moved past the boundary so update the position. After this we can 4874 // figure out if the user is expanding or shrinking to go by word or character. 4875 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4876 mTouchWordDelta = 0.0f; 4877 mLanguageDirectionChanged = false; 4878 return; 4879 } 4880 4881 boolean isExpanding; 4882 final float xDiff = x - mPrevX; 4883 if (isStartHandle()) { 4884 isExpanding = currLine < mPreviousLineTouched; 4885 } else { 4886 isExpanding = currLine > mPreviousLineTouched; 4887 } 4888 if (atRtl == isStartHandle()) { 4889 isExpanding |= xDiff > 0; 4890 } else { 4891 isExpanding |= xDiff < 0; 4892 } 4893 4894 if (mTextView.getHorizontallyScrolling()) { 4895 if (positionNearEdgeOfScrollingView(x, atRtl) 4896 && ((isStartHandle() && mTextView.getScrollX() != 0) 4897 || (!isStartHandle() 4898 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4899 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4900 || (!isStartHandle() && offset > currentOffset))) 4901 || !isExpanding)) { 4902 // If we're expanding ensure that the offset is actually expanding compared to 4903 // the current offset, if the handle snapped to the word, the finger position 4904 // may be out of sync and we don't want the selection to jump back. 4905 mTouchWordDelta = 0.0f; 4906 final int nextOffset = (atRtl == isStartHandle()) 4907 ? layout.getOffsetToRightOf(mPreviousOffset) 4908 : layout.getOffsetToLeftOf(mPreviousOffset); 4909 positionAndAdjustForCrossingHandles(nextOffset, fromTouchScreen); 4910 return; 4911 } 4912 } 4913 4914 if (isExpanding) { 4915 // User is increasing the selection. 4916 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4917 final boolean snapToWord = (!mInWord 4918 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4919 && atRtl == isAtRtlRun(layout, wordBoundary); 4920 if (snapToWord) { 4921 // Sometimes words can be broken across lines (Chinese, hyphenation). 4922 // We still snap to the word boundary but we only use the letters on the 4923 // current line to determine if the user is far enough into the word to snap. 4924 if (layout.getLineForOffset(wordBoundary) != currLine) { 4925 wordBoundary = isStartHandle() 4926 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4927 } 4928 final int offsetThresholdToSnap = isStartHandle() 4929 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4930 : wordStart + ((wordBoundary - wordStart) / 2); 4931 if (isStartHandle() 4932 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4933 // User is far enough into the word or on a different line so we expand by 4934 // word. 4935 offset = wordStart; 4936 } else if (!isStartHandle() 4937 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4938 // User is far enough into the word or on a different line so we expand by 4939 // word. 4940 offset = wordEnd; 4941 } else { 4942 offset = mPreviousOffset; 4943 } 4944 } 4945 if ((isStartHandle() && offset < initialOffset) 4946 || (!isStartHandle() && offset > initialOffset)) { 4947 final float adjustedX = getHorizontal(layout, offset); 4948 mTouchWordDelta = 4949 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4950 } else { 4951 mTouchWordDelta = 0.0f; 4952 } 4953 positionCursor = true; 4954 } else { 4955 final int adjustedOffset = 4956 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4957 final boolean shrinking = isStartHandle() 4958 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4959 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4960 if (shrinking) { 4961 // User is shrinking the selection. 4962 if (currLine != mPrevLine) { 4963 // We're on a different line, so we'll snap to word boundaries. 4964 offset = isStartHandle() ? wordStart : wordEnd; 4965 if ((isStartHandle() && offset < initialOffset) 4966 || (!isStartHandle() && offset > initialOffset)) { 4967 final float adjustedX = getHorizontal(layout, offset); 4968 mTouchWordDelta = 4969 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4970 } else { 4971 mTouchWordDelta = 0.0f; 4972 } 4973 } else { 4974 offset = adjustedOffset; 4975 } 4976 positionCursor = true; 4977 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4978 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4979 // Handle has jumped to the word boundary, and the user is moving 4980 // their finger towards the handle, the delta should be updated. 4981 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4982 - getHorizontal(layout, mPreviousOffset); 4983 } 4984 } 4985 4986 if (positionCursor) { 4987 mPreviousLineTouched = currLine; 4988 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4989 } 4990 mPrevX = x; 4991 } 4992 4993 @Override 4994 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4995 boolean fromTouchScreen) { 4996 super.positionAtCursorOffset(offset, forceUpdatePosition, fromTouchScreen); 4997 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 4998 } 4999 5000 @Override 5001 public boolean onTouchEvent(MotionEvent event) { 5002 boolean superResult = super.onTouchEvent(event); 5003 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 5004 // Reset the touch word offset and x value when the user 5005 // re-engages the handle. 5006 mTouchWordDelta = 0.0f; 5007 mPrevX = UNSET_X_VALUE; 5008 } 5009 return superResult; 5010 } 5011 5012 private void positionAndAdjustForCrossingHandles(int offset, boolean fromTouchScreen) { 5013 final int anotherHandleOffset = 5014 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5015 if ((isStartHandle() && offset >= anotherHandleOffset) 5016 || (!isStartHandle() && offset <= anotherHandleOffset)) { 5017 mTouchWordDelta = 0.0f; 5018 final Layout layout = mTextView.getLayout(); 5019 if (layout != null && offset != anotherHandleOffset) { 5020 final float horiz = getHorizontal(layout, offset); 5021 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 5022 !isStartHandle()); 5023 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 5024 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 5025 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 5026 // This handle passes another one as it crossed a direction boundary. 5027 // Don't minimize the selection, but keep the handle at the run boundary. 5028 final int currentOffset = getCurrentCursorOffset(); 5029 final int offsetToGetRunRange = isStartHandle() 5030 ? currentOffset : Math.max(currentOffset - 1, 0); 5031 final long range = layout.getRunRange(offsetToGetRunRange); 5032 if (isStartHandle()) { 5033 offset = TextUtils.unpackRangeStartFromLong(range); 5034 } else { 5035 offset = TextUtils.unpackRangeEndFromLong(range); 5036 } 5037 positionAtCursorOffset(offset, false, fromTouchScreen); 5038 return; 5039 } 5040 } 5041 // Handles can not cross and selection is at least one character. 5042 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5043 } 5044 positionAtCursorOffset(offset, false, fromTouchScreen); 5045 } 5046 5047 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5048 mTextView.getLocationOnScreen(mTextViewLocation); 5049 boolean nearEdge; 5050 if (atRtl == isStartHandle()) { 5051 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5052 - mTextView.getPaddingRight(); 5053 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5054 } else { 5055 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5056 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5057 } 5058 return nearEdge; 5059 } 5060 5061 @Override 5062 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5063 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5064 return layout.isRtlCharAt(offsetToCheck); 5065 } 5066 5067 @Override 5068 public float getHorizontal(@NonNull Layout layout, int offset) { 5069 return getHorizontal(layout, offset, isStartHandle()); 5070 } 5071 5072 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5073 final int line = layout.getLineForOffset(offset); 5074 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5075 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5076 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5077 return (isRtlChar == isRtlParagraph) 5078 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5079 } 5080 5081 @Override 5082 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5083 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5084 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5085 if (!layout.isLevelBoundary(primaryOffset)) { 5086 return primaryOffset; 5087 } 5088 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5089 final int currentOffset = getCurrentCursorOffset(); 5090 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5091 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5092 if (primaryDiff < secondaryDiff) { 5093 return primaryOffset; 5094 } else if (primaryDiff > secondaryDiff) { 5095 return secondaryOffset; 5096 } else { 5097 final int offsetToCheck = isStartHandle() 5098 ? currentOffset : Math.max(currentOffset - 1, 0); 5099 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5100 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5101 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5102 } 5103 } 5104 } 5105 5106 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5107 final int trueLine = mTextView.getLineAtCoordinate(y); 5108 if (layout == null || prevLine > layout.getLineCount() 5109 || layout.getLineCount() <= 0 || prevLine < 0) { 5110 // Invalid parameters, just return whatever line is at y. 5111 return trueLine; 5112 } 5113 5114 if (Math.abs(trueLine - prevLine) >= 2) { 5115 // Only stick to lines if we're within a line of the previous selection. 5116 return trueLine; 5117 } 5118 5119 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5120 final int lineCount = layout.getLineCount(); 5121 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5122 5123 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5124 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5125 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5126 5127 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5128 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5129 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5130 5131 // Determine if we've moved lines based on y position and previous line. 5132 int currLine; 5133 if (y <= yTopBound) { 5134 currLine = Math.max(prevLine - 1, 0); 5135 } else if (y >= yBottomBound) { 5136 currLine = Math.min(prevLine + 1, lineCount - 1); 5137 } else { 5138 currLine = prevLine; 5139 } 5140 return currLine; 5141 } 5142 5143 /** 5144 * A CursorController instance can be used to control a cursor in the text. 5145 */ 5146 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5147 /** 5148 * Makes the cursor controller visible on screen. 5149 * See also {@link #hide()}. 5150 */ 5151 public void show(); 5152 5153 /** 5154 * Hide the cursor controller from screen. 5155 * See also {@link #show()}. 5156 */ 5157 public void hide(); 5158 5159 /** 5160 * Called when the view is detached from window. Perform house keeping task, such as 5161 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5162 * preventing the activity from being recycled. 5163 */ 5164 public void onDetached(); 5165 5166 public boolean isCursorBeingModified(); 5167 5168 public boolean isActive(); 5169 } 5170 5171 private class InsertionPointCursorController implements CursorController { 5172 private InsertionHandleView mHandle; 5173 5174 public void show() { 5175 getHandle().show(); 5176 5177 if (mSelectionModifierCursorController != null) { 5178 mSelectionModifierCursorController.hide(); 5179 } 5180 } 5181 5182 public void hide() { 5183 if (mHandle != null) { 5184 mHandle.hide(); 5185 } 5186 } 5187 5188 public void onTouchModeChanged(boolean isInTouchMode) { 5189 if (!isInTouchMode) { 5190 hide(); 5191 } 5192 } 5193 5194 private InsertionHandleView getHandle() { 5195 if (mSelectHandleCenter == null) { 5196 mSelectHandleCenter = mTextView.getContext().getDrawable( 5197 mTextView.mTextSelectHandleRes); 5198 } 5199 if (mHandle == null) { 5200 mHandle = new InsertionHandleView(mSelectHandleCenter); 5201 } 5202 return mHandle; 5203 } 5204 5205 @Override 5206 public void onDetached() { 5207 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5208 observer.removeOnTouchModeChangeListener(this); 5209 5210 if (mHandle != null) mHandle.onDetached(); 5211 } 5212 5213 @Override 5214 public boolean isCursorBeingModified() { 5215 return mHandle != null && mHandle.isDragging(); 5216 } 5217 5218 @Override 5219 public boolean isActive() { 5220 return mHandle != null && mHandle.isShowing(); 5221 } 5222 5223 public void invalidateHandle() { 5224 if (mHandle != null) { 5225 mHandle.invalidate(); 5226 } 5227 } 5228 } 5229 5230 class SelectionModifierCursorController implements CursorController { 5231 // The cursor controller handles, lazily created when shown. 5232 private SelectionHandleView mStartHandle; 5233 private SelectionHandleView mEndHandle; 5234 // The offsets of that last touch down event. Remembered to start selection there. 5235 private int mMinTouchOffset, mMaxTouchOffset; 5236 5237 private float mDownPositionX, mDownPositionY; 5238 private boolean mGestureStayedInTapRegion; 5239 5240 // Where the user first starts the drag motion. 5241 private int mStartOffset = -1; 5242 5243 private boolean mHaventMovedEnoughToStartDrag; 5244 // The line that a selection happened most recently with the drag accelerator. 5245 private int mLineSelectionIsOn = -1; 5246 // Whether the drag accelerator has selected past the initial line. 5247 private boolean mSwitchedLines = false; 5248 5249 // Indicates the drag accelerator mode that the user is currently using. 5250 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5251 // Drag accelerator is inactive. 5252 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5253 // Character based selection by dragging. Only for mouse. 5254 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5255 // Word based selection by dragging. Enabled after long pressing or double tapping. 5256 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5257 // Paragraph based selection by dragging. Enabled after mouse triple click. 5258 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5259 5260 SelectionModifierCursorController() { 5261 resetTouchOffsets(); 5262 } 5263 5264 public void show() { 5265 if (mTextView.isInBatchEditMode()) { 5266 return; 5267 } 5268 initDrawables(); 5269 initHandles(); 5270 } 5271 5272 private void initDrawables() { 5273 if (mSelectHandleLeft == null) { 5274 mSelectHandleLeft = mTextView.getContext().getDrawable( 5275 mTextView.mTextSelectHandleLeftRes); 5276 } 5277 if (mSelectHandleRight == null) { 5278 mSelectHandleRight = mTextView.getContext().getDrawable( 5279 mTextView.mTextSelectHandleRightRes); 5280 } 5281 } 5282 5283 private void initHandles() { 5284 // Lazy object creation has to be done before updatePosition() is called. 5285 if (mStartHandle == null) { 5286 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5287 com.android.internal.R.id.selection_start_handle, 5288 HANDLE_TYPE_SELECTION_START); 5289 } 5290 if (mEndHandle == null) { 5291 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5292 com.android.internal.R.id.selection_end_handle, 5293 HANDLE_TYPE_SELECTION_END); 5294 } 5295 5296 mStartHandle.show(); 5297 mEndHandle.show(); 5298 5299 hideInsertionPointCursorController(); 5300 } 5301 5302 public void hide() { 5303 if (mStartHandle != null) mStartHandle.hide(); 5304 if (mEndHandle != null) mEndHandle.hide(); 5305 } 5306 5307 public void enterDrag(int dragAcceleratorMode) { 5308 // Just need to init the handles / hide insertion cursor. 5309 show(); 5310 mDragAcceleratorMode = dragAcceleratorMode; 5311 // Start location of selection. 5312 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5313 mLastDownPositionY); 5314 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5315 // Don't show the handles until user has lifted finger. 5316 hide(); 5317 5318 // This stops scrolling parents from intercepting the touch event, allowing 5319 // the user to continue dragging across the screen to select text; TextView will 5320 // scroll as necessary. 5321 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5322 mTextView.cancelLongPress(); 5323 } 5324 5325 public void onTouchEvent(MotionEvent event) { 5326 // This is done even when the View does not have focus, so that long presses can start 5327 // selection and tap can move cursor from this tap position. 5328 final float eventX = event.getX(); 5329 final float eventY = event.getY(); 5330 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5331 switch (event.getActionMasked()) { 5332 case MotionEvent.ACTION_DOWN: 5333 if (extractedTextModeWillBeStarted()) { 5334 // Prevent duplicating the selection handles until the mode starts. 5335 hide(); 5336 } else { 5337 // Remember finger down position, to be able to start selection from there. 5338 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5339 eventX, eventY); 5340 5341 // Double tap detection 5342 if (mGestureStayedInTapRegion) { 5343 if (mTapState == TAP_STATE_DOUBLE_TAP 5344 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5345 final float deltaX = eventX - mDownPositionX; 5346 final float deltaY = eventY - mDownPositionY; 5347 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5348 5349 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5350 mTextView.getContext()); 5351 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5352 boolean stayedInArea = 5353 distanceSquared < doubleTapSlop * doubleTapSlop; 5354 5355 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5356 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5357 selectCurrentWordAndStartDrag(); 5358 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5359 selectCurrentParagraphAndStartDrag(); 5360 } 5361 mDiscardNextActionUp = true; 5362 } 5363 } 5364 } 5365 5366 mDownPositionX = eventX; 5367 mDownPositionY = eventY; 5368 mGestureStayedInTapRegion = true; 5369 mHaventMovedEnoughToStartDrag = true; 5370 } 5371 break; 5372 5373 case MotionEvent.ACTION_POINTER_DOWN: 5374 case MotionEvent.ACTION_POINTER_UP: 5375 // Handle multi-point gestures. Keep min and max offset positions. 5376 // Only activated for devices that correctly handle multi-touch. 5377 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5378 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5379 updateMinAndMaxOffsets(event); 5380 } 5381 break; 5382 5383 case MotionEvent.ACTION_MOVE: 5384 final ViewConfiguration viewConfig = ViewConfiguration.get( 5385 mTextView.getContext()); 5386 final int touchSlop = viewConfig.getScaledTouchSlop(); 5387 5388 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5389 final float deltaX = eventX - mDownPositionX; 5390 final float deltaY = eventY - mDownPositionY; 5391 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5392 5393 if (mGestureStayedInTapRegion) { 5394 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5395 mGestureStayedInTapRegion = 5396 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5397 } 5398 if (mHaventMovedEnoughToStartDrag) { 5399 // We don't start dragging until the user has moved enough. 5400 mHaventMovedEnoughToStartDrag = 5401 distanceSquared <= touchSlop * touchSlop; 5402 } 5403 } 5404 5405 if (isMouse && !isDragAcceleratorActive()) { 5406 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5407 if (mTextView.hasSelection() 5408 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5409 && offset >= mTextView.getSelectionStart() 5410 && offset <= mTextView.getSelectionEnd()) { 5411 startDragAndDrop(); 5412 break; 5413 } 5414 5415 if (mStartOffset != offset) { 5416 // Start character based drag accelerator. 5417 stopTextActionMode(); 5418 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5419 mDiscardNextActionUp = true; 5420 mHaventMovedEnoughToStartDrag = false; 5421 } 5422 } 5423 5424 if (mStartHandle != null && mStartHandle.isShowing()) { 5425 // Don't do the drag if the handles are showing already. 5426 break; 5427 } 5428 5429 updateSelection(event); 5430 break; 5431 5432 case MotionEvent.ACTION_UP: 5433 if (!isDragAcceleratorActive()) { 5434 break; 5435 } 5436 updateSelection(event); 5437 5438 // No longer dragging to select text, let the parent intercept events. 5439 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5440 5441 // No longer the first dragging motion, reset. 5442 resetDragAcceleratorState(); 5443 5444 if (mTextView.hasSelection()) { 5445 // Drag selection should not be adjusted by the text classifier. 5446 startSelectionActionModeAsync(mHaventMovedEnoughToStartDrag); 5447 } 5448 break; 5449 } 5450 } 5451 5452 private void updateSelection(MotionEvent event) { 5453 if (mTextView.getLayout() != null) { 5454 switch (mDragAcceleratorMode) { 5455 case DRAG_ACCELERATOR_MODE_CHARACTER: 5456 updateCharacterBasedSelection(event); 5457 break; 5458 case DRAG_ACCELERATOR_MODE_WORD: 5459 updateWordBasedSelection(event); 5460 break; 5461 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5462 updateParagraphBasedSelection(event); 5463 break; 5464 } 5465 } 5466 } 5467 5468 /** 5469 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5470 * 5471 * @return true if the drag was started. 5472 */ 5473 private boolean selectCurrentParagraphAndStartDrag() { 5474 if (mInsertionActionModeRunnable != null) { 5475 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5476 } 5477 stopTextActionMode(); 5478 if (!selectCurrentParagraph()) { 5479 return false; 5480 } 5481 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5482 return true; 5483 } 5484 5485 private void updateCharacterBasedSelection(MotionEvent event) { 5486 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5487 updateSelectionInternal(mStartOffset, offset, 5488 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5489 } 5490 5491 private void updateWordBasedSelection(MotionEvent event) { 5492 if (mHaventMovedEnoughToStartDrag) { 5493 return; 5494 } 5495 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5496 final ViewConfiguration viewConfig = ViewConfiguration.get( 5497 mTextView.getContext()); 5498 final float eventX = event.getX(); 5499 final float eventY = event.getY(); 5500 final int currLine; 5501 if (isMouse) { 5502 // No need to offset the y coordinate for mouse input. 5503 currLine = mTextView.getLineAtCoordinate(eventY); 5504 } else { 5505 float y = eventY; 5506 if (mSwitchedLines) { 5507 // Offset the finger by the same vertical offset as the handles. 5508 // This improves visibility of the content being selected by 5509 // shifting the finger below the content, this is applied once 5510 // the user has switched lines. 5511 final int touchSlop = viewConfig.getScaledTouchSlop(); 5512 final float fingerOffset = (mStartHandle != null) 5513 ? mStartHandle.getIdealVerticalOffset() 5514 : touchSlop; 5515 y = eventY - fingerOffset; 5516 } 5517 5518 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5519 y); 5520 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5521 // Break early here, we want to offset the finger position from 5522 // the selection highlight, once the user moved their finger 5523 // to a different line we should apply the offset and *not* switch 5524 // lines until recomputing the position with the finger offset. 5525 mSwitchedLines = true; 5526 return; 5527 } 5528 } 5529 5530 int startOffset; 5531 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5532 // Snap to word boundaries. 5533 if (mStartOffset < offset) { 5534 // Expanding with end handle. 5535 offset = getWordEnd(offset); 5536 startOffset = getWordStart(mStartOffset); 5537 } else { 5538 // Expanding with start handle. 5539 offset = getWordStart(offset); 5540 startOffset = getWordEnd(mStartOffset); 5541 if (startOffset == offset) { 5542 offset = getNextCursorOffset(offset, false); 5543 } 5544 } 5545 mLineSelectionIsOn = currLine; 5546 updateSelectionInternal(startOffset, offset, 5547 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5548 } 5549 5550 private void updateParagraphBasedSelection(MotionEvent event) { 5551 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5552 5553 final int start = Math.min(offset, mStartOffset); 5554 final int end = Math.max(offset, mStartOffset); 5555 final long paragraphsRange = getParagraphsRange(start, end); 5556 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5557 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5558 updateSelectionInternal(selectionStart, selectionEnd, 5559 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5560 } 5561 5562 private void updateSelectionInternal(int selectionStart, int selectionEnd, 5563 boolean fromTouchScreen) { 5564 final boolean performHapticFeedback = fromTouchScreen && mHapticTextHandleEnabled 5565 && ((mTextView.getSelectionStart() != selectionStart) 5566 || (mTextView.getSelectionEnd() != selectionEnd)); 5567 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5568 if (performHapticFeedback) { 5569 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 5570 } 5571 } 5572 5573 /** 5574 * @param event 5575 */ 5576 private void updateMinAndMaxOffsets(MotionEvent event) { 5577 int pointerCount = event.getPointerCount(); 5578 for (int index = 0; index < pointerCount; index++) { 5579 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5580 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5581 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5582 } 5583 } 5584 5585 public int getMinTouchOffset() { 5586 return mMinTouchOffset; 5587 } 5588 5589 public int getMaxTouchOffset() { 5590 return mMaxTouchOffset; 5591 } 5592 5593 public void resetTouchOffsets() { 5594 mMinTouchOffset = mMaxTouchOffset = -1; 5595 resetDragAcceleratorState(); 5596 } 5597 5598 private void resetDragAcceleratorState() { 5599 mStartOffset = -1; 5600 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5601 mSwitchedLines = false; 5602 final int selectionStart = mTextView.getSelectionStart(); 5603 final int selectionEnd = mTextView.getSelectionEnd(); 5604 if (selectionStart > selectionEnd) { 5605 Selection.setSelection((Spannable) mTextView.getText(), 5606 selectionEnd, selectionStart); 5607 } 5608 } 5609 5610 /** 5611 * @return true iff this controller is currently used to move the selection start. 5612 */ 5613 public boolean isSelectionStartDragged() { 5614 return mStartHandle != null && mStartHandle.isDragging(); 5615 } 5616 5617 @Override 5618 public boolean isCursorBeingModified() { 5619 return isDragAcceleratorActive() || isSelectionStartDragged() 5620 || (mEndHandle != null && mEndHandle.isDragging()); 5621 } 5622 5623 /** 5624 * @return true if the user is selecting text using the drag accelerator. 5625 */ 5626 public boolean isDragAcceleratorActive() { 5627 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5628 } 5629 5630 public void onTouchModeChanged(boolean isInTouchMode) { 5631 if (!isInTouchMode) { 5632 hide(); 5633 } 5634 } 5635 5636 @Override 5637 public void onDetached() { 5638 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5639 observer.removeOnTouchModeChangeListener(this); 5640 5641 if (mStartHandle != null) mStartHandle.onDetached(); 5642 if (mEndHandle != null) mEndHandle.onDetached(); 5643 } 5644 5645 @Override 5646 public boolean isActive() { 5647 return mStartHandle != null && mStartHandle.isShowing(); 5648 } 5649 5650 public void invalidateHandles() { 5651 if (mStartHandle != null) { 5652 mStartHandle.invalidate(); 5653 } 5654 if (mEndHandle != null) { 5655 mEndHandle.invalidate(); 5656 } 5657 } 5658 } 5659 5660 private class CorrectionHighlighter { 5661 private final Path mPath = new Path(); 5662 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5663 private int mStart, mEnd; 5664 private long mFadingStartTime; 5665 private RectF mTempRectF; 5666 private static final int FADE_OUT_DURATION = 400; 5667 5668 public CorrectionHighlighter() { 5669 mPaint.setCompatibilityScaling( 5670 mTextView.getResources().getCompatibilityInfo().applicationScale); 5671 mPaint.setStyle(Paint.Style.FILL); 5672 } 5673 5674 public void highlight(CorrectionInfo info) { 5675 mStart = info.getOffset(); 5676 mEnd = mStart + info.getNewText().length(); 5677 mFadingStartTime = SystemClock.uptimeMillis(); 5678 5679 if (mStart < 0 || mEnd < 0) { 5680 stopAnimation(); 5681 } 5682 } 5683 5684 public void draw(Canvas canvas, int cursorOffsetVertical) { 5685 if (updatePath() && updatePaint()) { 5686 if (cursorOffsetVertical != 0) { 5687 canvas.translate(0, cursorOffsetVertical); 5688 } 5689 5690 canvas.drawPath(mPath, mPaint); 5691 5692 if (cursorOffsetVertical != 0) { 5693 canvas.translate(0, -cursorOffsetVertical); 5694 } 5695 invalidate(true); // TODO invalidate cursor region only 5696 } else { 5697 stopAnimation(); 5698 invalidate(false); // TODO invalidate cursor region only 5699 } 5700 } 5701 5702 private boolean updatePaint() { 5703 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5704 if (duration > FADE_OUT_DURATION) return false; 5705 5706 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5707 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5708 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5709 + ((int) (highlightColorAlpha * coef) << 24); 5710 mPaint.setColor(color); 5711 return true; 5712 } 5713 5714 private boolean updatePath() { 5715 final Layout layout = mTextView.getLayout(); 5716 if (layout == null) return false; 5717 5718 // Update in case text is edited while the animation is run 5719 final int length = mTextView.getText().length(); 5720 int start = Math.min(length, mStart); 5721 int end = Math.min(length, mEnd); 5722 5723 mPath.reset(); 5724 layout.getSelectionPath(start, end, mPath); 5725 return true; 5726 } 5727 5728 private void invalidate(boolean delayed) { 5729 if (mTextView.getLayout() == null) return; 5730 5731 if (mTempRectF == null) mTempRectF = new RectF(); 5732 mPath.computeBounds(mTempRectF, false); 5733 5734 int left = mTextView.getCompoundPaddingLeft(); 5735 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5736 5737 if (delayed) { 5738 mTextView.postInvalidateOnAnimation( 5739 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5740 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5741 } else { 5742 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5743 (int) mTempRectF.right, (int) mTempRectF.bottom); 5744 } 5745 } 5746 5747 private void stopAnimation() { 5748 Editor.this.mCorrectionHighlighter = null; 5749 } 5750 } 5751 5752 private static class ErrorPopup extends PopupWindow { 5753 private boolean mAbove = false; 5754 private final TextView mView; 5755 private int mPopupInlineErrorBackgroundId = 0; 5756 private int mPopupInlineErrorAboveBackgroundId = 0; 5757 5758 ErrorPopup(TextView v, int width, int height) { 5759 super(v, width, height); 5760 mView = v; 5761 // Make sure the TextView has a background set as it will be used the first time it is 5762 // shown and positioned. Initialized with below background, which should have 5763 // dimensions identical to the above version for this to work (and is more likely). 5764 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5765 com.android.internal.R.styleable.Theme_errorMessageBackground); 5766 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5767 } 5768 5769 void fixDirection(boolean above) { 5770 mAbove = above; 5771 5772 if (above) { 5773 mPopupInlineErrorAboveBackgroundId = 5774 getResourceId(mPopupInlineErrorAboveBackgroundId, 5775 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5776 } else { 5777 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5778 com.android.internal.R.styleable.Theme_errorMessageBackground); 5779 } 5780 5781 mView.setBackgroundResource( 5782 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5783 } 5784 5785 private int getResourceId(int currentId, int index) { 5786 if (currentId == 0) { 5787 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5788 R.styleable.Theme); 5789 currentId = styledAttributes.getResourceId(index, 0); 5790 styledAttributes.recycle(); 5791 } 5792 return currentId; 5793 } 5794 5795 @Override 5796 public void update(int x, int y, int w, int h, boolean force) { 5797 super.update(x, y, w, h, force); 5798 5799 boolean above = isAboveAnchor(); 5800 if (above != mAbove) { 5801 fixDirection(above); 5802 } 5803 } 5804 } 5805 5806 static class InputContentType { 5807 int imeOptions = EditorInfo.IME_NULL; 5808 String privateImeOptions; 5809 CharSequence imeActionLabel; 5810 int imeActionId; 5811 Bundle extras; 5812 OnEditorActionListener onEditorActionListener; 5813 boolean enterDown; 5814 LocaleList imeHintLocales; 5815 } 5816 5817 static class InputMethodState { 5818 ExtractedTextRequest mExtractedTextRequest; 5819 final ExtractedText mExtractedText = new ExtractedText(); 5820 int mBatchEditNesting; 5821 boolean mCursorChanged; 5822 boolean mSelectionModeChanged; 5823 boolean mContentChanged; 5824 int mChangedStart, mChangedEnd, mChangedDelta; 5825 } 5826 5827 /** 5828 * @return True iff (start, end) is a valid range within the text. 5829 */ 5830 private static boolean isValidRange(CharSequence text, int start, int end) { 5831 return 0 <= start && start <= end && end <= text.length(); 5832 } 5833 5834 @VisibleForTesting 5835 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5836 return mSuggestionsPopupWindow; 5837 } 5838 5839 /** 5840 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5841 * text being typed (and hence always returns null from the filter() method). 5842 * 5843 * TODO: Make this span aware. 5844 */ 5845 public static class UndoInputFilter implements InputFilter { 5846 private final Editor mEditor; 5847 5848 // Whether the current filter pass is directly caused by an end-user text edit. 5849 private boolean mIsUserEdit; 5850 5851 // Whether the text field is handling an IME composition. Must be parceled in case the user 5852 // rotates the screen during composition. 5853 private boolean mHasComposition; 5854 5855 // Whether the user is expanding or shortening the text 5856 private boolean mExpanding; 5857 5858 // Whether the previous edit operation was in the current batch edit. 5859 private boolean mPreviousOperationWasInSameBatchEdit; 5860 5861 public UndoInputFilter(Editor editor) { 5862 mEditor = editor; 5863 } 5864 5865 public void saveInstanceState(Parcel parcel) { 5866 parcel.writeInt(mIsUserEdit ? 1 : 0); 5867 parcel.writeInt(mHasComposition ? 1 : 0); 5868 parcel.writeInt(mExpanding ? 1 : 0); 5869 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5870 } 5871 5872 public void restoreInstanceState(Parcel parcel) { 5873 mIsUserEdit = parcel.readInt() != 0; 5874 mHasComposition = parcel.readInt() != 0; 5875 mExpanding = parcel.readInt() != 0; 5876 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5877 } 5878 5879 /** 5880 * Signals that a user-triggered edit is starting. 5881 */ 5882 public void beginBatchEdit() { 5883 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5884 mIsUserEdit = true; 5885 } 5886 5887 public void endBatchEdit() { 5888 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5889 mIsUserEdit = false; 5890 mPreviousOperationWasInSameBatchEdit = false; 5891 } 5892 5893 @Override 5894 public CharSequence filter(CharSequence source, int start, int end, 5895 Spanned dest, int dstart, int dend) { 5896 if (DEBUG_UNDO) { 5897 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 5898 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5899 } 5900 5901 // Check to see if this edit should be tracked for undo. 5902 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5903 return null; 5904 } 5905 5906 final boolean hadComposition = mHasComposition; 5907 mHasComposition = isComposition(source); 5908 final boolean wasExpanding = mExpanding; 5909 boolean shouldCreateSeparateState = false; 5910 if ((end - start) != (dend - dstart)) { 5911 mExpanding = (end - start) > (dend - dstart); 5912 if (hadComposition && mExpanding != wasExpanding) { 5913 shouldCreateSeparateState = true; 5914 } 5915 } 5916 5917 // Handle edit. 5918 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5919 return null; 5920 } 5921 5922 void freezeLastEdit() { 5923 mEditor.mUndoManager.beginUpdate("Edit text"); 5924 EditOperation lastEdit = getLastEdit(); 5925 if (lastEdit != null) { 5926 lastEdit.mFrozen = true; 5927 } 5928 mEditor.mUndoManager.endUpdate(); 5929 } 5930 5931 @Retention(RetentionPolicy.SOURCE) 5932 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5933 private @interface MergeMode {} 5934 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5935 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5936 /** Use {@link EditOperation#mergeWith} to merge */ 5937 private static final int MERGE_EDIT_MODE_NORMAL = 2; 5938 5939 private void handleEdit(CharSequence source, int start, int end, 5940 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5941 // An application may install a TextWatcher to provide additional modifications after 5942 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5943 // string). This results in multiple filter() calls for what the user considers to be 5944 // a single operation. Always undo the whole set of changes in one step. 5945 @MergeMode 5946 final int mergeMode; 5947 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5948 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5949 } else if (shouldCreateSeparateState) { 5950 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5951 } else { 5952 mergeMode = MERGE_EDIT_MODE_NORMAL; 5953 } 5954 // Build a new operation with all the information from this edit. 5955 String newText = TextUtils.substring(source, start, end); 5956 String oldText = TextUtils.substring(dest, dstart, dend); 5957 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5958 mHasComposition); 5959 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5960 return; 5961 } 5962 recordEdit(edit, mergeMode); 5963 } 5964 5965 private EditOperation getLastEdit() { 5966 final UndoManager um = mEditor.mUndoManager; 5967 return um.getLastOperation( 5968 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5969 } 5970 /** 5971 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5972 * If forceMerge is true then the new edit is always merged. 5973 */ 5974 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5975 // Fetch the last edit operation and attempt to merge in the new edit. 5976 final UndoManager um = mEditor.mUndoManager; 5977 um.beginUpdate("Edit text"); 5978 EditOperation lastEdit = getLastEdit(); 5979 if (lastEdit == null) { 5980 // Add this as the first edit. 5981 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5982 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5983 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5984 // Forced merges take priority because they could be the result of a non-user-edit 5985 // change and this case should not create a new undo operation. 5986 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5987 lastEdit.forceMergeWith(edit); 5988 } else if (!mIsUserEdit) { 5989 // An application directly modified the Editable outside of a text edit. Treat this 5990 // as a new change and don't attempt to merge. 5991 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5992 um.commitState(mEditor.mUndoOwner); 5993 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5994 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 5995 // Merge succeeded, nothing else to do. 5996 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5997 } else { 5998 // Could not merge with the last edit, so commit the last edit and add this edit. 5999 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 6000 um.commitState(mEditor.mUndoOwner); 6001 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6002 } 6003 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 6004 um.endUpdate(); 6005 } 6006 6007 private boolean canUndoEdit(CharSequence source, int start, int end, 6008 Spanned dest, int dstart, int dend) { 6009 if (!mEditor.mAllowUndo) { 6010 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 6011 return false; 6012 } 6013 6014 if (mEditor.mUndoManager.isInUndo()) { 6015 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 6016 return false; 6017 } 6018 6019 // Text filters run before input operations are applied. However, some input operations 6020 // are invalid and will throw exceptions when applied. This is common in tests. Don't 6021 // attempt to undo invalid operations. 6022 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 6023 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 6024 return false; 6025 } 6026 6027 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 6028 // on an input field. Skip no-op changes. 6029 if (start == end && dstart == dend) { 6030 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 6031 return false; 6032 } 6033 6034 return true; 6035 } 6036 6037 private static boolean isComposition(CharSequence source) { 6038 if (!(source instanceof Spannable)) { 6039 return false; 6040 } 6041 // This is a composition edit if the source has a non-zero-length composing span. 6042 Spannable text = (Spannable) source; 6043 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6044 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6045 return composeBegin < composeEnd; 6046 } 6047 6048 private boolean isInTextWatcher() { 6049 CharSequence text = mEditor.mTextView.getText(); 6050 return (text instanceof SpannableStringBuilder) 6051 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6052 } 6053 } 6054 6055 /** 6056 * An operation to undo a single "edit" to a text view. 6057 */ 6058 public static class EditOperation extends UndoOperation<Editor> { 6059 private static final int TYPE_INSERT = 0; 6060 private static final int TYPE_DELETE = 1; 6061 private static final int TYPE_REPLACE = 2; 6062 6063 private int mType; 6064 private String mOldText; 6065 private String mNewText; 6066 private int mStart; 6067 6068 private int mOldCursorPos; 6069 private int mNewCursorPos; 6070 private boolean mFrozen; 6071 private boolean mIsComposition; 6072 6073 /** 6074 * Constructs an edit operation from a text input operation on editor that replaces the 6075 * oldText starting at dstart with newText. 6076 */ 6077 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6078 boolean isComposition) { 6079 super(editor.mUndoOwner); 6080 mOldText = oldText; 6081 mNewText = newText; 6082 6083 // Determine the type of the edit. 6084 if (mNewText.length() > 0 && mOldText.length() == 0) { 6085 mType = TYPE_INSERT; 6086 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6087 mType = TYPE_DELETE; 6088 } else { 6089 mType = TYPE_REPLACE; 6090 } 6091 6092 mStart = dstart; 6093 // Store cursor data. 6094 mOldCursorPos = editor.mTextView.getSelectionStart(); 6095 mNewCursorPos = dstart + mNewText.length(); 6096 mIsComposition = isComposition; 6097 } 6098 6099 public EditOperation(Parcel src, ClassLoader loader) { 6100 super(src, loader); 6101 mType = src.readInt(); 6102 mOldText = src.readString(); 6103 mNewText = src.readString(); 6104 mStart = src.readInt(); 6105 mOldCursorPos = src.readInt(); 6106 mNewCursorPos = src.readInt(); 6107 mFrozen = src.readInt() == 1; 6108 mIsComposition = src.readInt() == 1; 6109 } 6110 6111 @Override 6112 public void writeToParcel(Parcel dest, int flags) { 6113 dest.writeInt(mType); 6114 dest.writeString(mOldText); 6115 dest.writeString(mNewText); 6116 dest.writeInt(mStart); 6117 dest.writeInt(mOldCursorPos); 6118 dest.writeInt(mNewCursorPos); 6119 dest.writeInt(mFrozen ? 1 : 0); 6120 dest.writeInt(mIsComposition ? 1 : 0); 6121 } 6122 6123 private int getNewTextEnd() { 6124 return mStart + mNewText.length(); 6125 } 6126 6127 private int getOldTextEnd() { 6128 return mStart + mOldText.length(); 6129 } 6130 6131 @Override 6132 public void commit() { 6133 } 6134 6135 @Override 6136 public void undo() { 6137 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6138 // Remove the new text and insert the old. 6139 Editor editor = getOwnerData(); 6140 Editable text = (Editable) editor.mTextView.getText(); 6141 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6142 } 6143 6144 @Override 6145 public void redo() { 6146 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6147 // Remove the old text and insert the new. 6148 Editor editor = getOwnerData(); 6149 Editable text = (Editable) editor.mTextView.getText(); 6150 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6151 } 6152 6153 /** 6154 * Attempts to merge this existing operation with a new edit. 6155 * @param edit The new edit operation. 6156 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6157 * object unchanged. 6158 */ 6159 private boolean mergeWith(EditOperation edit) { 6160 if (DEBUG_UNDO) { 6161 Log.d(TAG, "mergeWith old " + this); 6162 Log.d(TAG, "mergeWith new " + edit); 6163 } 6164 6165 if (mFrozen) { 6166 return false; 6167 } 6168 6169 switch (mType) { 6170 case TYPE_INSERT: 6171 return mergeInsertWith(edit); 6172 case TYPE_DELETE: 6173 return mergeDeleteWith(edit); 6174 case TYPE_REPLACE: 6175 return mergeReplaceWith(edit); 6176 default: 6177 return false; 6178 } 6179 } 6180 6181 private boolean mergeInsertWith(EditOperation edit) { 6182 if (edit.mType == TYPE_INSERT) { 6183 // Merge insertions that are contiguous even when it's frozen. 6184 if (getNewTextEnd() != edit.mStart) { 6185 return false; 6186 } 6187 mNewText += edit.mNewText; 6188 mNewCursorPos = edit.mNewCursorPos; 6189 mFrozen = edit.mFrozen; 6190 mIsComposition = edit.mIsComposition; 6191 return true; 6192 } 6193 if (mIsComposition && edit.mType == TYPE_REPLACE 6194 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6195 // Merge insertion with replace as they can be single insertion. 6196 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6197 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6198 mNewCursorPos = edit.mNewCursorPos; 6199 mIsComposition = edit.mIsComposition; 6200 return true; 6201 } 6202 return false; 6203 } 6204 6205 // TODO: Support forward delete. 6206 private boolean mergeDeleteWith(EditOperation edit) { 6207 // Only merge continuous deletes. 6208 if (edit.mType != TYPE_DELETE) { 6209 return false; 6210 } 6211 // Only merge deletions that are contiguous. 6212 if (mStart != edit.getOldTextEnd()) { 6213 return false; 6214 } 6215 mStart = edit.mStart; 6216 mOldText = edit.mOldText + mOldText; 6217 mNewCursorPos = edit.mNewCursorPos; 6218 mIsComposition = edit.mIsComposition; 6219 return true; 6220 } 6221 6222 private boolean mergeReplaceWith(EditOperation edit) { 6223 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6224 // Merge with adjacent insert. 6225 mNewText += edit.mNewText; 6226 mNewCursorPos = edit.mNewCursorPos; 6227 return true; 6228 } 6229 if (!mIsComposition) { 6230 return false; 6231 } 6232 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6233 && getNewTextEnd() >= edit.getOldTextEnd()) { 6234 // Merge with delete as they can be single operation. 6235 mNewText = mNewText.substring(0, edit.mStart - mStart) 6236 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6237 if (mNewText.isEmpty()) { 6238 mType = TYPE_DELETE; 6239 } 6240 mNewCursorPos = edit.mNewCursorPos; 6241 mIsComposition = edit.mIsComposition; 6242 return true; 6243 } 6244 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6245 && TextUtils.equals(mNewText, edit.mOldText)) { 6246 // Merge with the replace that replaces the same region. 6247 mNewText = edit.mNewText; 6248 mNewCursorPos = edit.mNewCursorPos; 6249 mIsComposition = edit.mIsComposition; 6250 return true; 6251 } 6252 return false; 6253 } 6254 6255 /** 6256 * Forcibly creates a single merged edit operation by simulating the entire text 6257 * contents being replaced. 6258 */ 6259 public void forceMergeWith(EditOperation edit) { 6260 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6261 if (mergeWith(edit)) { 6262 return; 6263 } 6264 Editor editor = getOwnerData(); 6265 6266 // Copy the text of the current field. 6267 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6268 // but would require two parallel implementations of modifyText() because Editable and 6269 // StringBuilder do not share an interface for replace/delete/insert. 6270 Editable editable = (Editable) editor.mTextView.getText(); 6271 Editable originalText = new SpannableStringBuilder(editable.toString()); 6272 6273 // Roll back the last operation. 6274 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6275 6276 // Clone the text again and apply the new operation. 6277 Editable finalText = new SpannableStringBuilder(editable.toString()); 6278 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6279 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6280 6281 // Convert this operation into a replace operation. 6282 mType = TYPE_REPLACE; 6283 mNewText = finalText.toString(); 6284 mOldText = originalText.toString(); 6285 mStart = 0; 6286 mNewCursorPos = edit.mNewCursorPos; 6287 mIsComposition = edit.mIsComposition; 6288 // mOldCursorPos is unchanged. 6289 } 6290 6291 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6292 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6293 // Apply the edit if it is still valid. 6294 if (isValidRange(text, deleteFrom, deleteTo) 6295 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6296 if (deleteFrom != deleteTo) { 6297 text.delete(deleteFrom, deleteTo); 6298 } 6299 if (newText.length() != 0) { 6300 text.insert(newTextInsertAt, newText); 6301 } 6302 } 6303 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6304 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6305 // TODO: Select all the text that was undone. 6306 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6307 Selection.setSelection(text, newCursorPos); 6308 } 6309 } 6310 6311 private String getTypeString() { 6312 switch (mType) { 6313 case TYPE_INSERT: 6314 return "insert"; 6315 case TYPE_DELETE: 6316 return "delete"; 6317 case TYPE_REPLACE: 6318 return "replace"; 6319 default: 6320 return ""; 6321 } 6322 } 6323 6324 @Override 6325 public String toString() { 6326 return "[mType=" + getTypeString() + ", " 6327 + "mOldText=" + mOldText + ", " 6328 + "mNewText=" + mNewText + ", " 6329 + "mStart=" + mStart + ", " 6330 + "mOldCursorPos=" + mOldCursorPos + ", " 6331 + "mNewCursorPos=" + mNewCursorPos + ", " 6332 + "mFrozen=" + mFrozen + ", " 6333 + "mIsComposition=" + mIsComposition + "]"; 6334 } 6335 6336 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6337 new Parcelable.ClassLoaderCreator<EditOperation>() { 6338 @Override 6339 public EditOperation createFromParcel(Parcel in) { 6340 return new EditOperation(in, null); 6341 } 6342 6343 @Override 6344 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6345 return new EditOperation(in, loader); 6346 } 6347 6348 @Override 6349 public EditOperation[] newArray(int size) { 6350 return new EditOperation[size]; 6351 } 6352 }; 6353 } 6354 6355 /** 6356 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6357 * These allow external applications to plug into currently selected text. 6358 */ 6359 static final class ProcessTextIntentActionsHandler { 6360 6361 private final Editor mEditor; 6362 private final TextView mTextView; 6363 private final Context mContext; 6364 private final PackageManager mPackageManager; 6365 private final String mPackageName; 6366 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6367 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6368 new SparseArray<>(); 6369 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6370 6371 private ProcessTextIntentActionsHandler(Editor editor) { 6372 mEditor = Preconditions.checkNotNull(editor); 6373 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6374 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6375 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6376 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6377 } 6378 6379 /** 6380 * Adds "PROCESS_TEXT" menu items to the specified menu. 6381 */ 6382 public void onInitializeMenu(Menu menu) { 6383 final int size = mSupportedActivities.size(); 6384 loadSupportedActivities(); 6385 for (int i = 0; i < size; i++) { 6386 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6387 menu.add(Menu.NONE, Menu.NONE, 6388 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6389 getLabel(resolveInfo)) 6390 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6391 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6392 } 6393 } 6394 6395 /** 6396 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6397 * menu item. 6398 * 6399 * @return True if the action was performed, false otherwise. 6400 */ 6401 public boolean performMenuItemAction(MenuItem item) { 6402 return fireIntent(item.getIntent()); 6403 } 6404 6405 /** 6406 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6407 */ 6408 public void initializeAccessibilityActions() { 6409 mAccessibilityIntents.clear(); 6410 mAccessibilityActions.clear(); 6411 int i = 0; 6412 loadSupportedActivities(); 6413 for (ResolveInfo resolveInfo : mSupportedActivities) { 6414 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6415 mAccessibilityActions.put( 6416 actionId, 6417 new AccessibilityNodeInfo.AccessibilityAction( 6418 actionId, getLabel(resolveInfo))); 6419 mAccessibilityIntents.put( 6420 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6421 } 6422 } 6423 6424 /** 6425 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6426 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6427 * latest accessibility actions available for this call. 6428 */ 6429 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6430 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6431 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6432 } 6433 } 6434 6435 /** 6436 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6437 * accessibility action id. 6438 * 6439 * @return True if the action was performed, false otherwise. 6440 */ 6441 public boolean performAccessibilityAction(int actionId) { 6442 return fireIntent(mAccessibilityIntents.get(actionId)); 6443 } 6444 6445 private boolean fireIntent(Intent intent) { 6446 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6447 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 6448 mEditor.mPreserveSelection = true; 6449 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6450 return true; 6451 } 6452 return false; 6453 } 6454 6455 private void loadSupportedActivities() { 6456 mSupportedActivities.clear(); 6457 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6458 List<ResolveInfo> unfiltered = 6459 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6460 for (ResolveInfo info : unfiltered) { 6461 if (isSupportedActivity(info)) { 6462 mSupportedActivities.add(info); 6463 } 6464 } 6465 } 6466 6467 private boolean isSupportedActivity(ResolveInfo info) { 6468 return mPackageName.equals(info.activityInfo.packageName) 6469 || info.activityInfo.exported 6470 && (info.activityInfo.permission == null 6471 || mContext.checkSelfPermission(info.activityInfo.permission) 6472 == PackageManager.PERMISSION_GRANTED); 6473 } 6474 6475 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6476 return createProcessTextIntent() 6477 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6478 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6479 } 6480 6481 private Intent createProcessTextIntent() { 6482 return new Intent() 6483 .setAction(Intent.ACTION_PROCESS_TEXT) 6484 .setType("text/plain"); 6485 } 6486 6487 private CharSequence getLabel(ResolveInfo resolveInfo) { 6488 return resolveInfo.loadLabel(mPackageManager); 6489 } 6490 } 6491} 6492