Editor.java revision 1d263b8a38cd2468ff271aef83b15f9d74490625
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.IntDef; 21import android.annotation.NonNull; 22import android.annotation.Nullable; 23import android.app.PendingIntent; 24import android.app.PendingIntent.CanceledException; 25import android.content.ClipData; 26import android.content.ClipData.Item; 27import android.content.Context; 28import android.content.Intent; 29import android.content.UndoManager; 30import android.content.UndoOperation; 31import android.content.UndoOwner; 32import android.content.pm.PackageManager; 33import android.content.pm.ResolveInfo; 34import android.content.res.TypedArray; 35import android.graphics.Canvas; 36import android.graphics.Color; 37import android.graphics.Matrix; 38import android.graphics.Paint; 39import android.graphics.Path; 40import android.graphics.Rect; 41import android.graphics.RectF; 42import android.graphics.drawable.ColorDrawable; 43import android.graphics.drawable.Drawable; 44import android.metrics.LogMaker; 45import android.os.Bundle; 46import android.os.LocaleList; 47import android.os.Parcel; 48import android.os.Parcelable; 49import android.os.ParcelableParcel; 50import android.os.SystemClock; 51import android.provider.Settings; 52import android.text.DynamicLayout; 53import android.text.Editable; 54import android.text.InputFilter; 55import android.text.InputType; 56import android.text.Layout; 57import android.text.ParcelableSpan; 58import android.text.Selection; 59import android.text.SpanWatcher; 60import android.text.Spannable; 61import android.text.SpannableStringBuilder; 62import android.text.Spanned; 63import android.text.StaticLayout; 64import android.text.TextUtils; 65import android.text.method.KeyListener; 66import android.text.method.MetaKeyKeyListener; 67import android.text.method.MovementMethod; 68import android.text.method.WordIterator; 69import android.text.style.EasyEditSpan; 70import android.text.style.SuggestionRangeSpan; 71import android.text.style.SuggestionSpan; 72import android.text.style.TextAppearanceSpan; 73import android.text.style.URLSpan; 74import android.util.ArraySet; 75import android.util.DisplayMetrics; 76import android.util.Log; 77import android.util.SparseArray; 78import android.view.ActionMode; 79import android.view.ActionMode.Callback; 80import android.view.ContextMenu; 81import android.view.ContextThemeWrapper; 82import android.view.DisplayListCanvas; 83import android.view.DragAndDropPermissions; 84import android.view.DragEvent; 85import android.view.Gravity; 86import android.view.HapticFeedbackConstants; 87import android.view.InputDevice; 88import android.view.LayoutInflater; 89import android.view.Menu; 90import android.view.MenuItem; 91import android.view.MotionEvent; 92import android.view.RenderNode; 93import android.view.SubMenu; 94import android.view.View; 95import android.view.View.DragShadowBuilder; 96import android.view.View.OnClickListener; 97import android.view.ViewConfiguration; 98import android.view.ViewGroup; 99import android.view.ViewGroup.LayoutParams; 100import android.view.ViewTreeObserver; 101import android.view.WindowManager; 102import android.view.accessibility.AccessibilityNodeInfo; 103import android.view.inputmethod.CorrectionInfo; 104import android.view.inputmethod.CursorAnchorInfo; 105import android.view.inputmethod.EditorInfo; 106import android.view.inputmethod.ExtractedText; 107import android.view.inputmethod.ExtractedTextRequest; 108import android.view.inputmethod.InputConnection; 109import android.view.inputmethod.InputMethodManager; 110import android.view.textclassifier.TextClassification; 111import android.widget.AdapterView.OnItemClickListener; 112import android.widget.TextView.Drawables; 113import android.widget.TextView.OnEditorActionListener; 114 115import com.android.internal.annotations.VisibleForTesting; 116import com.android.internal.logging.MetricsLogger; 117import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 118import com.android.internal.util.ArrayUtils; 119import com.android.internal.util.GrowingArrayUtils; 120import com.android.internal.util.Preconditions; 121import com.android.internal.widget.EditableInputConnection; 122 123import java.lang.annotation.Retention; 124import java.lang.annotation.RetentionPolicy; 125import java.text.BreakIterator; 126import java.util.ArrayList; 127import java.util.Arrays; 128import java.util.Comparator; 129import java.util.HashMap; 130import java.util.List; 131 132 133/** 134 * Helper class used by TextView to handle editable text views. 135 * 136 * @hide 137 */ 138public class Editor { 139 private static final String TAG = "Editor"; 140 private static final boolean DEBUG_UNDO = false; 141 142 static final int BLINK = 500; 143 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 144 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 145 private static final int UNSET_X_VALUE = -1; 146 private static final int UNSET_LINE = -1; 147 // Tag used when the Editor maintains its own separate UndoManager. 148 private static final String UNDO_OWNER_TAG = "Editor"; 149 150 // Ordering constants used to place the Action Mode or context menu items in their menu. 151 private static final int MENU_ITEM_ORDER_ASSIST = 0; 152 private static final int MENU_ITEM_ORDER_UNDO = 2; 153 private static final int MENU_ITEM_ORDER_REDO = 3; 154 private static final int MENU_ITEM_ORDER_CUT = 4; 155 private static final int MENU_ITEM_ORDER_COPY = 5; 156 private static final int MENU_ITEM_ORDER_PASTE = 6; 157 private static final int MENU_ITEM_ORDER_SHARE = 7; 158 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 159 private static final int MENU_ITEM_ORDER_REPLACE = 9; 160 private static final int MENU_ITEM_ORDER_AUTOFILL = 10; 161 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 11; 162 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 163 164 // Each Editor manages its own undo stack. 165 private final UndoManager mUndoManager = new UndoManager(); 166 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 167 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 168 boolean mAllowUndo = true; 169 170 private final MetricsLogger mMetricsLogger = new MetricsLogger(); 171 172 // Cursor Controllers. 173 private InsertionPointCursorController mInsertionPointCursorController; 174 SelectionModifierCursorController mSelectionModifierCursorController; 175 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 176 private ActionMode mTextActionMode; 177 private boolean mInsertionControllerEnabled; 178 private boolean mSelectionControllerEnabled; 179 180 private final boolean mHapticTextHandleEnabled; 181 182 // Used to highlight a word when it is corrected by the IME 183 private CorrectionHighlighter mCorrectionHighlighter; 184 185 InputContentType mInputContentType; 186 InputMethodState mInputMethodState; 187 188 private static class TextRenderNode { 189 // Render node has 3 recording states: 190 // 1. Recorded operations are valid. 191 // #needsRecord() returns false, but needsToBeShifted is false. 192 // 2. Recorded operations are not valid, but just the position needed to be updated. 193 // #needsRecord() returns false, but needsToBeShifted is true. 194 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 195 // true. 196 RenderNode renderNode; 197 boolean isDirty; 198 // Becomes true when recorded operations can be reused, but the position has to be updated. 199 boolean needsToBeShifted; 200 public TextRenderNode(String name) { 201 renderNode = RenderNode.create(name, null); 202 isDirty = true; 203 needsToBeShifted = true; 204 } 205 boolean needsRecord() { 206 return isDirty || !renderNode.isValid(); 207 } 208 } 209 private TextRenderNode[] mTextRenderNodes; 210 211 boolean mFrozenWithFocus; 212 boolean mSelectionMoved; 213 boolean mTouchFocusSelected; 214 215 KeyListener mKeyListener; 216 int mInputType = EditorInfo.TYPE_NULL; 217 218 boolean mDiscardNextActionUp; 219 boolean mIgnoreActionUpEvent; 220 221 long mShowCursor; 222 private Blink mBlink; 223 224 boolean mCursorVisible = true; 225 boolean mSelectAllOnFocus; 226 boolean mTextIsSelectable; 227 228 CharSequence mError; 229 boolean mErrorWasChanged; 230 private ErrorPopup mErrorPopup; 231 232 /** 233 * This flag is set if the TextView tries to display an error before it 234 * is attached to the window (so its position is still unknown). 235 * It causes the error to be shown later, when onAttachedToWindow() 236 * is called. 237 */ 238 private boolean mShowErrorAfterAttach; 239 240 boolean mInBatchEditControllers; 241 boolean mShowSoftInputOnFocus = true; 242 private boolean mPreserveSelection; 243 private boolean mRestartActionModeOnNextRefresh; 244 245 private SelectionActionModeHelper mSelectionActionModeHelper; 246 247 boolean mIsBeingLongClicked; 248 249 private SuggestionsPopupWindow mSuggestionsPopupWindow; 250 SuggestionRangeSpan mSuggestionRangeSpan; 251 private Runnable mShowSuggestionRunnable; 252 253 final Drawable[] mCursorDrawable = new Drawable[2]; 254 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 255 256 private Drawable mSelectHandleLeft; 257 private Drawable mSelectHandleRight; 258 private Drawable mSelectHandleCenter; 259 260 // Global listener that detects changes in the global position of the TextView 261 private PositionListener mPositionListener; 262 263 private float mLastDownPositionX, mLastDownPositionY; 264 private float mContextMenuAnchorX, mContextMenuAnchorY; 265 Callback mCustomSelectionActionModeCallback; 266 Callback mCustomInsertionActionModeCallback; 267 268 // Set when this TextView gained focus with some text selected. Will start selection mode. 269 boolean mCreatedWithASelection; 270 271 // Indicates the current tap state (first tap, double tap, or triple click). 272 private int mTapState = TAP_STATE_INITIAL; 273 private long mLastTouchUpTime = 0; 274 private static final int TAP_STATE_INITIAL = 0; 275 private static final int TAP_STATE_FIRST_TAP = 1; 276 private static final int TAP_STATE_DOUBLE_TAP = 2; 277 // Only for mouse input. 278 private static final int TAP_STATE_TRIPLE_CLICK = 3; 279 280 // The button state as of the last time #onTouchEvent is called. 281 private int mLastButtonState; 282 283 private Runnable mInsertionActionModeRunnable; 284 285 // The span controller helps monitoring the changes to which the Editor needs to react: 286 // - EasyEditSpans, for which we have some UI to display on attach and on hide 287 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 288 private SpanController mSpanController; 289 290 private WordIterator mWordIterator; 291 SpellChecker mSpellChecker; 292 293 // This word iterator is set with text and used to determine word boundaries 294 // when a user is selecting text. 295 private WordIterator mWordIteratorWithText; 296 // Indicate that the text in the word iterator needs to be updated. 297 private boolean mUpdateWordIteratorText; 298 299 private Rect mTempRect; 300 301 private final TextView mTextView; 302 303 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 304 305 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 306 new CursorAnchorInfoNotifier(); 307 308 private final Runnable mShowFloatingToolbar = new Runnable() { 309 @Override 310 public void run() { 311 if (mTextActionMode != null) { 312 mTextActionMode.hide(0); // hide off. 313 } 314 } 315 }; 316 317 boolean mIsInsertionActionModeStartPending = false; 318 319 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 320 321 Editor(TextView textView) { 322 mTextView = textView; 323 // Synchronize the filter list, which places the undo input filter at the end. 324 mTextView.setFilters(mTextView.getFilters()); 325 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 326 mHapticTextHandleEnabled = mTextView.getContext().getResources().getBoolean( 327 com.android.internal.R.bool.config_enableHapticTextHandle); 328 } 329 330 ParcelableParcel saveInstanceState() { 331 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 332 Parcel parcel = state.getParcel(); 333 mUndoManager.saveInstanceState(parcel); 334 mUndoInputFilter.saveInstanceState(parcel); 335 return state; 336 } 337 338 void restoreInstanceState(ParcelableParcel state) { 339 Parcel parcel = state.getParcel(); 340 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 341 mUndoInputFilter.restoreInstanceState(parcel); 342 // Re-associate this object as the owner of undo state. 343 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 344 } 345 346 /** 347 * Forgets all undo and redo operations for this Editor. 348 */ 349 void forgetUndoRedo() { 350 UndoOwner[] owners = { mUndoOwner }; 351 mUndoManager.forgetUndos(owners, -1 /* all */); 352 mUndoManager.forgetRedos(owners, -1 /* all */); 353 } 354 355 boolean canUndo() { 356 UndoOwner[] owners = { mUndoOwner }; 357 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 358 } 359 360 boolean canRedo() { 361 UndoOwner[] owners = { mUndoOwner }; 362 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 363 } 364 365 void undo() { 366 if (!mAllowUndo) { 367 return; 368 } 369 UndoOwner[] owners = { mUndoOwner }; 370 mUndoManager.undo(owners, 1); // Undo 1 action. 371 } 372 373 void redo() { 374 if (!mAllowUndo) { 375 return; 376 } 377 UndoOwner[] owners = { mUndoOwner }; 378 mUndoManager.redo(owners, 1); // Redo 1 action. 379 } 380 381 void replace() { 382 if (mSuggestionsPopupWindow == null) { 383 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 384 } 385 hideCursorAndSpanControllers(); 386 mSuggestionsPopupWindow.show(); 387 388 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 389 Selection.setSelection((Spannable) mTextView.getText(), middle); 390 } 391 392 void onAttachedToWindow() { 393 if (mShowErrorAfterAttach) { 394 showError(); 395 mShowErrorAfterAttach = false; 396 } 397 398 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 399 // No need to create the controller. 400 // The get method will add the listener on controller creation. 401 if (mInsertionPointCursorController != null) { 402 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 403 } 404 if (mSelectionModifierCursorController != null) { 405 mSelectionModifierCursorController.resetTouchOffsets(); 406 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 407 } 408 updateSpellCheckSpans(0, mTextView.getText().length(), 409 true /* create the spell checker if needed */); 410 411 if (mTextView.hasSelection()) { 412 refreshTextActionMode(); 413 } 414 415 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 416 resumeBlink(); 417 } 418 419 void onDetachedFromWindow() { 420 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 421 422 if (mError != null) { 423 hideError(); 424 } 425 426 suspendBlink(); 427 428 if (mInsertionPointCursorController != null) { 429 mInsertionPointCursorController.onDetached(); 430 } 431 432 if (mSelectionModifierCursorController != null) { 433 mSelectionModifierCursorController.onDetached(); 434 } 435 436 if (mShowSuggestionRunnable != null) { 437 mTextView.removeCallbacks(mShowSuggestionRunnable); 438 } 439 440 // Cancel the single tap delayed runnable. 441 if (mInsertionActionModeRunnable != null) { 442 mTextView.removeCallbacks(mInsertionActionModeRunnable); 443 } 444 445 mTextView.removeCallbacks(mShowFloatingToolbar); 446 447 discardTextDisplayLists(); 448 449 if (mSpellChecker != null) { 450 mSpellChecker.closeSession(); 451 // Forces the creation of a new SpellChecker next time this window is created. 452 // Will handle the cases where the settings has been changed in the meantime. 453 mSpellChecker = null; 454 } 455 456 hideCursorAndSpanControllers(); 457 stopTextActionModeWithPreservingSelection(); 458 } 459 460 private void discardTextDisplayLists() { 461 if (mTextRenderNodes != null) { 462 for (int i = 0; i < mTextRenderNodes.length; i++) { 463 RenderNode displayList = mTextRenderNodes[i] != null 464 ? mTextRenderNodes[i].renderNode : null; 465 if (displayList != null && displayList.isValid()) { 466 displayList.discardDisplayList(); 467 } 468 } 469 } 470 } 471 472 private void showError() { 473 if (mTextView.getWindowToken() == null) { 474 mShowErrorAfterAttach = true; 475 return; 476 } 477 478 if (mErrorPopup == null) { 479 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 480 final TextView err = (TextView) inflater.inflate( 481 com.android.internal.R.layout.textview_hint, null); 482 483 final float scale = mTextView.getResources().getDisplayMetrics().density; 484 mErrorPopup = 485 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 486 mErrorPopup.setFocusable(false); 487 // The user is entering text, so the input method is needed. We 488 // don't want the popup to be displayed on top of it. 489 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 490 } 491 492 TextView tv = (TextView) mErrorPopup.getContentView(); 493 chooseSize(mErrorPopup, mError, tv); 494 tv.setText(mError); 495 496 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 497 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 498 } 499 500 public void setError(CharSequence error, Drawable icon) { 501 mError = TextUtils.stringOrSpannedString(error); 502 mErrorWasChanged = true; 503 504 if (mError == null) { 505 setErrorIcon(null); 506 if (mErrorPopup != null) { 507 if (mErrorPopup.isShowing()) { 508 mErrorPopup.dismiss(); 509 } 510 511 mErrorPopup = null; 512 } 513 mShowErrorAfterAttach = false; 514 } else { 515 setErrorIcon(icon); 516 if (mTextView.isFocused()) { 517 showError(); 518 } 519 } 520 } 521 522 private void setErrorIcon(Drawable icon) { 523 Drawables dr = mTextView.mDrawables; 524 if (dr == null) { 525 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 526 } 527 dr.setErrorDrawable(icon, mTextView); 528 529 mTextView.resetResolvedDrawables(); 530 mTextView.invalidate(); 531 mTextView.requestLayout(); 532 } 533 534 private void hideError() { 535 if (mErrorPopup != null) { 536 if (mErrorPopup.isShowing()) { 537 mErrorPopup.dismiss(); 538 } 539 } 540 541 mShowErrorAfterAttach = false; 542 } 543 544 /** 545 * Returns the X offset to make the pointy top of the error point 546 * at the middle of the error icon. 547 */ 548 private int getErrorX() { 549 /* 550 * The "25" is the distance between the point and the right edge 551 * of the background 552 */ 553 final float scale = mTextView.getResources().getDisplayMetrics().density; 554 555 final Drawables dr = mTextView.mDrawables; 556 557 final int layoutDirection = mTextView.getLayoutDirection(); 558 int errorX; 559 int offset; 560 switch (layoutDirection) { 561 default: 562 case View.LAYOUT_DIRECTION_LTR: 563 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 564 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 565 - mTextView.getPaddingRight() + offset; 566 break; 567 case View.LAYOUT_DIRECTION_RTL: 568 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 569 errorX = mTextView.getPaddingLeft() + offset; 570 break; 571 } 572 return errorX; 573 } 574 575 /** 576 * Returns the Y offset to make the pointy top of the error point 577 * at the bottom of the error icon. 578 */ 579 private int getErrorY() { 580 /* 581 * Compound, not extended, because the icon is not clipped 582 * if the text height is smaller. 583 */ 584 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 585 int vspace = mTextView.getBottom() - mTextView.getTop() 586 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 587 588 final Drawables dr = mTextView.mDrawables; 589 590 final int layoutDirection = mTextView.getLayoutDirection(); 591 int height; 592 switch (layoutDirection) { 593 default: 594 case View.LAYOUT_DIRECTION_LTR: 595 height = (dr != null ? dr.mDrawableHeightRight : 0); 596 break; 597 case View.LAYOUT_DIRECTION_RTL: 598 height = (dr != null ? dr.mDrawableHeightLeft : 0); 599 break; 600 } 601 602 int icontop = compoundPaddingTop + (vspace - height) / 2; 603 604 /* 605 * The "2" is the distance between the point and the top edge 606 * of the background. 607 */ 608 final float scale = mTextView.getResources().getDisplayMetrics().density; 609 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 610 } 611 612 void createInputContentTypeIfNeeded() { 613 if (mInputContentType == null) { 614 mInputContentType = new InputContentType(); 615 } 616 } 617 618 void createInputMethodStateIfNeeded() { 619 if (mInputMethodState == null) { 620 mInputMethodState = new InputMethodState(); 621 } 622 } 623 624 boolean isCursorVisible() { 625 // The default value is true, even when there is no associated Editor 626 return mCursorVisible && mTextView.isTextEditable(); 627 } 628 629 void prepareCursorControllers() { 630 boolean windowSupportsHandles = false; 631 632 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 633 if (params instanceof WindowManager.LayoutParams) { 634 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 635 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 636 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 637 } 638 639 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 640 mInsertionControllerEnabled = enabled && isCursorVisible(); 641 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 642 643 if (!mInsertionControllerEnabled) { 644 hideInsertionPointCursorController(); 645 if (mInsertionPointCursorController != null) { 646 mInsertionPointCursorController.onDetached(); 647 mInsertionPointCursorController = null; 648 } 649 } 650 651 if (!mSelectionControllerEnabled) { 652 stopTextActionMode(); 653 if (mSelectionModifierCursorController != null) { 654 mSelectionModifierCursorController.onDetached(); 655 mSelectionModifierCursorController = null; 656 } 657 } 658 } 659 660 void hideInsertionPointCursorController() { 661 if (mInsertionPointCursorController != null) { 662 mInsertionPointCursorController.hide(); 663 } 664 } 665 666 /** 667 * Hides the insertion and span controllers. 668 */ 669 void hideCursorAndSpanControllers() { 670 hideCursorControllers(); 671 hideSpanControllers(); 672 } 673 674 private void hideSpanControllers() { 675 if (mSpanController != null) { 676 mSpanController.hide(); 677 } 678 } 679 680 private void hideCursorControllers() { 681 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 682 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 683 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 684 // to distinguish one from the other. 685 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 686 || !mSuggestionsPopupWindow.isShowingUp())) { 687 // Should be done before hide insertion point controller since it triggers a show of it 688 mSuggestionsPopupWindow.hide(); 689 } 690 hideInsertionPointCursorController(); 691 } 692 693 /** 694 * Create new SpellCheckSpans on the modified region. 695 */ 696 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 697 // Remove spans whose adjacent characters are text not punctuation 698 mTextView.removeAdjacentSuggestionSpans(start); 699 mTextView.removeAdjacentSuggestionSpans(end); 700 701 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 702 && !(mTextView.isInExtractedMode())) { 703 if (mSpellChecker == null && createSpellChecker) { 704 mSpellChecker = new SpellChecker(mTextView); 705 } 706 if (mSpellChecker != null) { 707 mSpellChecker.spellCheck(start, end); 708 } 709 } 710 } 711 712 void onScreenStateChanged(int screenState) { 713 switch (screenState) { 714 case View.SCREEN_STATE_ON: 715 resumeBlink(); 716 break; 717 case View.SCREEN_STATE_OFF: 718 suspendBlink(); 719 break; 720 } 721 } 722 723 private void suspendBlink() { 724 if (mBlink != null) { 725 mBlink.cancel(); 726 } 727 } 728 729 private void resumeBlink() { 730 if (mBlink != null) { 731 mBlink.uncancel(); 732 makeBlink(); 733 } 734 } 735 736 void adjustInputType(boolean password, boolean passwordInputType, 737 boolean webPasswordInputType, boolean numberPasswordInputType) { 738 // mInputType has been set from inputType, possibly modified by mInputMethod. 739 // Specialize mInputType to [web]password if we have a text class and the original input 740 // type was a password. 741 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 742 if (password || passwordInputType) { 743 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 744 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 745 } 746 if (webPasswordInputType) { 747 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 748 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 749 } 750 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 751 if (numberPasswordInputType) { 752 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 753 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 754 } 755 } 756 } 757 758 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 759 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 760 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 761 762 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 763 com.android.internal.R.dimen.textview_error_popup_default_width); 764 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 765 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 766 float max = 0; 767 for (int i = 0; i < l.getLineCount(); i++) { 768 max = Math.max(max, l.getLineWidth(i)); 769 } 770 771 /* 772 * Now set the popup size to be big enough for the text plus the border capped 773 * to DEFAULT_MAX_POPUP_WIDTH 774 */ 775 pop.setWidth(wid + (int) Math.ceil(max)); 776 pop.setHeight(ht + l.getHeight()); 777 } 778 779 void setFrame() { 780 if (mErrorPopup != null) { 781 TextView tv = (TextView) mErrorPopup.getContentView(); 782 chooseSize(mErrorPopup, mError, tv); 783 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 784 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 785 } 786 } 787 788 private int getWordStart(int offset) { 789 // FIXME - For this and similar methods we're not doing anything to check if there's 790 // a LocaleSpan in the text, this may be something we should try handling or checking for. 791 int retOffset = getWordIteratorWithText().prevBoundary(offset); 792 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 793 // On punctuation boundary or within group of punctuation, find punctuation start. 794 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 795 } else { 796 // Not on a punctuation boundary, find the word start. 797 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 798 } 799 if (retOffset == BreakIterator.DONE) { 800 return offset; 801 } 802 return retOffset; 803 } 804 805 private int getWordEnd(int offset) { 806 int retOffset = getWordIteratorWithText().nextBoundary(offset); 807 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 808 // On punctuation boundary or within group of punctuation, find punctuation end. 809 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 810 } else { 811 // Not on a punctuation boundary, find the word end. 812 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 813 } 814 if (retOffset == BreakIterator.DONE) { 815 return offset; 816 } 817 return retOffset; 818 } 819 820 private boolean needsToSelectAllToSelectWordOrParagraph() { 821 if (mTextView.hasPasswordTransformationMethod()) { 822 // Always select all on a password field. 823 // Cut/copy menu entries are not available for passwords, but being able to select all 824 // is however useful to delete or paste to replace the entire content. 825 return true; 826 } 827 828 int inputType = mTextView.getInputType(); 829 int klass = inputType & InputType.TYPE_MASK_CLASS; 830 int variation = inputType & InputType.TYPE_MASK_VARIATION; 831 832 // Specific text field types: select the entire text for these 833 if (klass == InputType.TYPE_CLASS_NUMBER 834 || klass == InputType.TYPE_CLASS_PHONE 835 || klass == InputType.TYPE_CLASS_DATETIME 836 || variation == InputType.TYPE_TEXT_VARIATION_URI 837 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 838 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 839 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 840 return true; 841 } 842 return false; 843 } 844 845 /** 846 * Adjusts selection to the word under last touch offset. Return true if the operation was 847 * successfully performed. 848 */ 849 boolean selectCurrentWord() { 850 if (!mTextView.canSelectText()) { 851 return false; 852 } 853 854 if (needsToSelectAllToSelectWordOrParagraph()) { 855 return mTextView.selectAllText(); 856 } 857 858 long lastTouchOffsets = getLastTouchOffsets(); 859 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 860 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 861 862 // Safety check in case standard touch event handling has been bypassed 863 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 864 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 865 866 int selectionStart, selectionEnd; 867 868 // If a URLSpan (web address, email, phone...) is found at that position, select it. 869 URLSpan[] urlSpans = 870 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 871 if (urlSpans.length >= 1) { 872 URLSpan urlSpan = urlSpans[0]; 873 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 874 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 875 } else { 876 // FIXME - We should check if there's a LocaleSpan in the text, this may be 877 // something we should try handling or checking for. 878 final WordIterator wordIterator = getWordIterator(); 879 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 880 881 selectionStart = wordIterator.getBeginning(minOffset); 882 selectionEnd = wordIterator.getEnd(maxOffset); 883 884 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 885 || selectionStart == selectionEnd) { 886 // Possible when the word iterator does not properly handle the text's language 887 long range = getCharClusterRange(minOffset); 888 selectionStart = TextUtils.unpackRangeStartFromLong(range); 889 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 890 } 891 } 892 893 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 894 return selectionEnd > selectionStart; 895 } 896 897 /** 898 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 899 * successfully performed. 900 */ 901 private boolean selectCurrentParagraph() { 902 if (!mTextView.canSelectText()) { 903 return false; 904 } 905 906 if (needsToSelectAllToSelectWordOrParagraph()) { 907 return mTextView.selectAllText(); 908 } 909 910 long lastTouchOffsets = getLastTouchOffsets(); 911 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 912 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 913 914 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 915 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 916 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 917 if (start < end) { 918 Selection.setSelection((Spannable) mTextView.getText(), start, end); 919 return true; 920 } 921 return false; 922 } 923 924 /** 925 * Get the minimum range of paragraphs that contains startOffset and endOffset. 926 */ 927 private long getParagraphsRange(int startOffset, int endOffset) { 928 final Layout layout = mTextView.getLayout(); 929 if (layout == null) { 930 return TextUtils.packRangeInLong(-1, -1); 931 } 932 final CharSequence text = mTextView.getText(); 933 int minLine = layout.getLineForOffset(startOffset); 934 // Search paragraph start. 935 while (minLine > 0) { 936 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 937 if (text.charAt(prevLineEndOffset - 1) == '\n') { 938 break; 939 } 940 minLine--; 941 } 942 int maxLine = layout.getLineForOffset(endOffset); 943 // Search paragraph end. 944 while (maxLine < layout.getLineCount() - 1) { 945 final int lineEndOffset = layout.getLineEnd(maxLine); 946 if (text.charAt(lineEndOffset - 1) == '\n') { 947 break; 948 } 949 maxLine++; 950 } 951 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 952 } 953 954 void onLocaleChanged() { 955 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 956 // proper new locale 957 mWordIterator = null; 958 mWordIteratorWithText = null; 959 } 960 961 public WordIterator getWordIterator() { 962 if (mWordIterator == null) { 963 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 964 } 965 return mWordIterator; 966 } 967 968 private WordIterator getWordIteratorWithText() { 969 if (mWordIteratorWithText == null) { 970 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 971 mUpdateWordIteratorText = true; 972 } 973 if (mUpdateWordIteratorText) { 974 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 975 // to the user's selection is needed. A possible solution would be to 976 // copy some number N of characters near the selection and then when the 977 // user approaches N then we'd do another copy of the next N characters. 978 CharSequence text = mTextView.getText(); 979 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 980 mUpdateWordIteratorText = false; 981 } 982 return mWordIteratorWithText; 983 } 984 985 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 986 final Layout layout = mTextView.getLayout(); 987 if (layout == null) return offset; 988 return findAfterGivenOffset == layout.isRtlCharAt(offset) 989 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 990 } 991 992 private long getCharClusterRange(int offset) { 993 final int textLength = mTextView.getText().length(); 994 if (offset < textLength) { 995 final int clusterEndOffset = getNextCursorOffset(offset, true); 996 return TextUtils.packRangeInLong( 997 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 998 } 999 if (offset - 1 >= 0) { 1000 final int clusterStartOffset = getNextCursorOffset(offset, false); 1001 return TextUtils.packRangeInLong(clusterStartOffset, 1002 getNextCursorOffset(clusterStartOffset, true)); 1003 } 1004 return TextUtils.packRangeInLong(offset, offset); 1005 } 1006 1007 private boolean touchPositionIsInSelection() { 1008 int selectionStart = mTextView.getSelectionStart(); 1009 int selectionEnd = mTextView.getSelectionEnd(); 1010 1011 if (selectionStart == selectionEnd) { 1012 return false; 1013 } 1014 1015 if (selectionStart > selectionEnd) { 1016 int tmp = selectionStart; 1017 selectionStart = selectionEnd; 1018 selectionEnd = tmp; 1019 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1020 } 1021 1022 SelectionModifierCursorController selectionController = getSelectionController(); 1023 int minOffset = selectionController.getMinTouchOffset(); 1024 int maxOffset = selectionController.getMaxTouchOffset(); 1025 1026 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1027 } 1028 1029 private PositionListener getPositionListener() { 1030 if (mPositionListener == null) { 1031 mPositionListener = new PositionListener(); 1032 } 1033 return mPositionListener; 1034 } 1035 1036 private interface TextViewPositionListener { 1037 public void updatePosition(int parentPositionX, int parentPositionY, 1038 boolean parentPositionChanged, boolean parentScrolled); 1039 } 1040 1041 private boolean isOffsetVisible(int offset) { 1042 Layout layout = mTextView.getLayout(); 1043 if (layout == null) return false; 1044 1045 final int line = layout.getLineForOffset(offset); 1046 final int lineBottom = layout.getLineBottom(line); 1047 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1048 return mTextView.isPositionVisible( 1049 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1050 lineBottom + mTextView.viewportToContentVerticalOffset()); 1051 } 1052 1053 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1054 * in the view. Returns false when the position is in the empty space of left/right of text. 1055 */ 1056 private boolean isPositionOnText(float x, float y) { 1057 Layout layout = mTextView.getLayout(); 1058 if (layout == null) return false; 1059 1060 final int line = mTextView.getLineAtCoordinate(y); 1061 x = mTextView.convertToLocalHorizontalCoordinate(x); 1062 1063 if (x < layout.getLineLeft(line)) return false; 1064 if (x > layout.getLineRight(line)) return false; 1065 return true; 1066 } 1067 1068 private void startDragAndDrop() { 1069 // TODO: Fix drag and drop in full screen extracted mode. 1070 if (mTextView.isInExtractedMode()) { 1071 return; 1072 } 1073 final int start = mTextView.getSelectionStart(); 1074 final int end = mTextView.getSelectionEnd(); 1075 CharSequence selectedText = mTextView.getTransformedText(start, end); 1076 ClipData data = ClipData.newPlainText(null, selectedText); 1077 DragLocalState localState = new DragLocalState(mTextView, start, end); 1078 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1079 View.DRAG_FLAG_GLOBAL); 1080 stopTextActionMode(); 1081 if (hasSelectionController()) { 1082 getSelectionController().resetTouchOffsets(); 1083 } 1084 } 1085 1086 public boolean performLongClick(boolean handled) { 1087 // Long press in empty space moves cursor and starts the insertion action mode. 1088 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1089 && mInsertionControllerEnabled) { 1090 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1091 mLastDownPositionY); 1092 Selection.setSelection((Spannable) mTextView.getText(), offset); 1093 getInsertionController().show(); 1094 mIsInsertionActionModeStartPending = true; 1095 handled = true; 1096 MetricsLogger.action( 1097 mTextView.getContext(), 1098 MetricsEvent.TEXT_LONGPRESS, 1099 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1100 } 1101 1102 if (!handled && mTextActionMode != null) { 1103 if (touchPositionIsInSelection()) { 1104 startDragAndDrop(); 1105 MetricsLogger.action( 1106 mTextView.getContext(), 1107 MetricsEvent.TEXT_LONGPRESS, 1108 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1109 } else { 1110 stopTextActionMode(); 1111 selectCurrentWordAndStartDrag(); 1112 MetricsLogger.action( 1113 mTextView.getContext(), 1114 MetricsEvent.TEXT_LONGPRESS, 1115 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1116 } 1117 handled = true; 1118 } 1119 1120 // Start a new selection 1121 if (!handled) { 1122 handled = selectCurrentWordAndStartDrag(); 1123 if (handled) { 1124 MetricsLogger.action( 1125 mTextView.getContext(), 1126 MetricsEvent.TEXT_LONGPRESS, 1127 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1128 } 1129 } 1130 1131 return handled; 1132 } 1133 1134 private long getLastTouchOffsets() { 1135 SelectionModifierCursorController selectionController = getSelectionController(); 1136 final int minOffset = selectionController.getMinTouchOffset(); 1137 final int maxOffset = selectionController.getMaxTouchOffset(); 1138 return TextUtils.packRangeInLong(minOffset, maxOffset); 1139 } 1140 1141 void onFocusChanged(boolean focused, int direction) { 1142 mShowCursor = SystemClock.uptimeMillis(); 1143 ensureEndedBatchEdit(); 1144 1145 if (focused) { 1146 int selStart = mTextView.getSelectionStart(); 1147 int selEnd = mTextView.getSelectionEnd(); 1148 1149 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1150 // mode for these, unless there was a specific selection already started. 1151 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1152 && selEnd == mTextView.getText().length(); 1153 1154 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1155 && !isFocusHighlighted; 1156 1157 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1158 // If a tap was used to give focus to that view, move cursor at tap position. 1159 // Has to be done before onTakeFocus, which can be overloaded. 1160 final int lastTapPosition = getLastTapPosition(); 1161 if (lastTapPosition >= 0) { 1162 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1163 } 1164 1165 // Note this may have to be moved out of the Editor class 1166 MovementMethod mMovement = mTextView.getMovementMethod(); 1167 if (mMovement != null) { 1168 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1169 } 1170 1171 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1172 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1173 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1174 // This special case ensure that we keep current selection in that case. 1175 // It would be better to know why the DecorView does not have focus at that time. 1176 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1177 && selStart >= 0 && selEnd >= 0) { 1178 /* 1179 * Someone intentionally set the selection, so let them 1180 * do whatever it is that they wanted to do instead of 1181 * the default on-focus behavior. We reset the selection 1182 * here instead of just skipping the onTakeFocus() call 1183 * because some movement methods do something other than 1184 * just setting the selection in theirs and we still 1185 * need to go through that path. 1186 */ 1187 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1188 } 1189 1190 if (mSelectAllOnFocus) { 1191 mTextView.selectAllText(); 1192 } 1193 1194 mTouchFocusSelected = true; 1195 } 1196 1197 mFrozenWithFocus = false; 1198 mSelectionMoved = false; 1199 1200 if (mError != null) { 1201 showError(); 1202 } 1203 1204 makeBlink(); 1205 } else { 1206 if (mError != null) { 1207 hideError(); 1208 } 1209 // Don't leave us in the middle of a batch edit. 1210 mTextView.onEndBatchEdit(); 1211 1212 if (mTextView.isInExtractedMode()) { 1213 hideCursorAndSpanControllers(); 1214 stopTextActionModeWithPreservingSelection(); 1215 } else { 1216 hideCursorAndSpanControllers(); 1217 if (mTextView.isTemporarilyDetached()) { 1218 stopTextActionModeWithPreservingSelection(); 1219 } else { 1220 stopTextActionMode(); 1221 } 1222 downgradeEasyCorrectionSpans(); 1223 } 1224 // No need to create the controller 1225 if (mSelectionModifierCursorController != null) { 1226 mSelectionModifierCursorController.resetTouchOffsets(); 1227 } 1228 } 1229 } 1230 1231 /** 1232 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1233 * span. 1234 */ 1235 private void downgradeEasyCorrectionSpans() { 1236 CharSequence text = mTextView.getText(); 1237 if (text instanceof Spannable) { 1238 Spannable spannable = (Spannable) text; 1239 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1240 spannable.length(), SuggestionSpan.class); 1241 for (int i = 0; i < suggestionSpans.length; i++) { 1242 int flags = suggestionSpans[i].getFlags(); 1243 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1244 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1245 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1246 suggestionSpans[i].setFlags(flags); 1247 } 1248 } 1249 } 1250 } 1251 1252 void sendOnTextChanged(int start, int after) { 1253 updateSpellCheckSpans(start, start + after, false); 1254 1255 // Flip flag to indicate the word iterator needs to have the text reset. 1256 mUpdateWordIteratorText = true; 1257 1258 // Hide the controllers as soon as text is modified (typing, procedural...) 1259 // We do not hide the span controllers, since they can be added when a new text is 1260 // inserted into the text view (voice IME). 1261 hideCursorControllers(); 1262 // Reset drag accelerator. 1263 if (mSelectionModifierCursorController != null) { 1264 mSelectionModifierCursorController.resetTouchOffsets(); 1265 } 1266 stopTextActionMode(); 1267 } 1268 1269 private int getLastTapPosition() { 1270 // No need to create the controller at that point, no last tap position saved 1271 if (mSelectionModifierCursorController != null) { 1272 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1273 if (lastTapPosition >= 0) { 1274 // Safety check, should not be possible. 1275 if (lastTapPosition > mTextView.getText().length()) { 1276 lastTapPosition = mTextView.getText().length(); 1277 } 1278 return lastTapPosition; 1279 } 1280 } 1281 1282 return -1; 1283 } 1284 1285 void onWindowFocusChanged(boolean hasWindowFocus) { 1286 if (hasWindowFocus) { 1287 if (mBlink != null) { 1288 mBlink.uncancel(); 1289 makeBlink(); 1290 } 1291 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1292 refreshTextActionMode(); 1293 } 1294 } else { 1295 if (mBlink != null) { 1296 mBlink.cancel(); 1297 } 1298 if (mInputContentType != null) { 1299 mInputContentType.enterDown = false; 1300 } 1301 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1302 hideCursorAndSpanControllers(); 1303 stopTextActionModeWithPreservingSelection(); 1304 if (mSuggestionsPopupWindow != null) { 1305 mSuggestionsPopupWindow.onParentLostFocus(); 1306 } 1307 1308 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1309 ensureEndedBatchEdit(); 1310 } 1311 } 1312 1313 private void updateTapState(MotionEvent event) { 1314 final int action = event.getActionMasked(); 1315 if (action == MotionEvent.ACTION_DOWN) { 1316 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1317 // Detect double tap and triple click. 1318 if (((mTapState == TAP_STATE_FIRST_TAP) 1319 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1320 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1321 <= ViewConfiguration.getDoubleTapTimeout()) { 1322 if (mTapState == TAP_STATE_FIRST_TAP) { 1323 mTapState = TAP_STATE_DOUBLE_TAP; 1324 } else { 1325 mTapState = TAP_STATE_TRIPLE_CLICK; 1326 } 1327 } else { 1328 mTapState = TAP_STATE_FIRST_TAP; 1329 } 1330 } 1331 if (action == MotionEvent.ACTION_UP) { 1332 mLastTouchUpTime = SystemClock.uptimeMillis(); 1333 } 1334 } 1335 1336 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1337 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1338 return false; 1339 } 1340 final boolean primaryButtonStateChanged = 1341 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1342 final int action = event.getActionMasked(); 1343 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1344 && !primaryButtonStateChanged) { 1345 return true; 1346 } 1347 if (action == MotionEvent.ACTION_MOVE 1348 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1349 return true; 1350 } 1351 return false; 1352 } 1353 1354 void onTouchEvent(MotionEvent event) { 1355 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1356 mLastButtonState = event.getButtonState(); 1357 if (filterOutEvent) { 1358 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1359 mDiscardNextActionUp = true; 1360 } 1361 return; 1362 } 1363 updateTapState(event); 1364 updateFloatingToolbarVisibility(event); 1365 1366 if (hasSelectionController()) { 1367 getSelectionController().onTouchEvent(event); 1368 } 1369 1370 if (mShowSuggestionRunnable != null) { 1371 mTextView.removeCallbacks(mShowSuggestionRunnable); 1372 mShowSuggestionRunnable = null; 1373 } 1374 1375 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1376 mLastDownPositionX = event.getX(); 1377 mLastDownPositionY = event.getY(); 1378 1379 // Reset this state; it will be re-set if super.onTouchEvent 1380 // causes focus to move to the view. 1381 mTouchFocusSelected = false; 1382 mIgnoreActionUpEvent = false; 1383 } 1384 } 1385 1386 private void updateFloatingToolbarVisibility(MotionEvent event) { 1387 if (mTextActionMode != null) { 1388 switch (event.getActionMasked()) { 1389 case MotionEvent.ACTION_MOVE: 1390 hideFloatingToolbar(); 1391 break; 1392 case MotionEvent.ACTION_UP: // fall through 1393 case MotionEvent.ACTION_CANCEL: 1394 showFloatingToolbar(); 1395 } 1396 } 1397 } 1398 1399 private void hideFloatingToolbar() { 1400 if (mTextActionMode != null) { 1401 mTextView.removeCallbacks(mShowFloatingToolbar); 1402 mTextActionMode.hide(ActionMode.DEFAULT_HIDE_DURATION); 1403 } 1404 } 1405 1406 private void showFloatingToolbar() { 1407 if (mTextActionMode != null) { 1408 // Delay "show" so it doesn't interfere with click confirmations 1409 // or double-clicks that could "dismiss" the floating toolbar. 1410 int delay = ViewConfiguration.getDoubleTapTimeout(); 1411 mTextView.postDelayed(mShowFloatingToolbar, delay); 1412 1413 // This classifies the text and most likely returns before the toolbar is actually 1414 // shown. If not, it will update the toolbar with the result when classification 1415 // returns. We would rather not wait for a long running classification process. 1416 invalidateActionModeAsync(); 1417 } 1418 } 1419 1420 public void beginBatchEdit() { 1421 mInBatchEditControllers = true; 1422 final InputMethodState ims = mInputMethodState; 1423 if (ims != null) { 1424 int nesting = ++ims.mBatchEditNesting; 1425 if (nesting == 1) { 1426 ims.mCursorChanged = false; 1427 ims.mChangedDelta = 0; 1428 if (ims.mContentChanged) { 1429 // We already have a pending change from somewhere else, 1430 // so turn this into a full update. 1431 ims.mChangedStart = 0; 1432 ims.mChangedEnd = mTextView.getText().length(); 1433 } else { 1434 ims.mChangedStart = EXTRACT_UNKNOWN; 1435 ims.mChangedEnd = EXTRACT_UNKNOWN; 1436 ims.mContentChanged = false; 1437 } 1438 mUndoInputFilter.beginBatchEdit(); 1439 mTextView.onBeginBatchEdit(); 1440 } 1441 } 1442 } 1443 1444 public void endBatchEdit() { 1445 mInBatchEditControllers = false; 1446 final InputMethodState ims = mInputMethodState; 1447 if (ims != null) { 1448 int nesting = --ims.mBatchEditNesting; 1449 if (nesting == 0) { 1450 finishBatchEdit(ims); 1451 } 1452 } 1453 } 1454 1455 void ensureEndedBatchEdit() { 1456 final InputMethodState ims = mInputMethodState; 1457 if (ims != null && ims.mBatchEditNesting != 0) { 1458 ims.mBatchEditNesting = 0; 1459 finishBatchEdit(ims); 1460 } 1461 } 1462 1463 void finishBatchEdit(final InputMethodState ims) { 1464 mTextView.onEndBatchEdit(); 1465 mUndoInputFilter.endBatchEdit(); 1466 1467 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1468 mTextView.updateAfterEdit(); 1469 reportExtractedText(); 1470 } else if (ims.mCursorChanged) { 1471 // Cheesy way to get us to report the current cursor location. 1472 mTextView.invalidateCursor(); 1473 } 1474 // sendUpdateSelection knows to avoid sending if the selection did 1475 // not actually change. 1476 sendUpdateSelection(); 1477 1478 // Show drag handles if they were blocked by batch edit mode. 1479 if (mTextActionMode != null) { 1480 final CursorController cursorController = mTextView.hasSelection() 1481 ? getSelectionController() : getInsertionController(); 1482 if (cursorController != null && !cursorController.isActive() 1483 && !cursorController.isCursorBeingModified()) { 1484 cursorController.show(); 1485 } 1486 } 1487 } 1488 1489 static final int EXTRACT_NOTHING = -2; 1490 static final int EXTRACT_UNKNOWN = -1; 1491 1492 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1493 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1494 EXTRACT_UNKNOWN, outText); 1495 } 1496 1497 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1498 int partialStartOffset, int partialEndOffset, int delta, 1499 @Nullable ExtractedText outText) { 1500 if (request == null || outText == null) { 1501 return false; 1502 } 1503 1504 final CharSequence content = mTextView.getText(); 1505 if (content == null) { 1506 return false; 1507 } 1508 1509 if (partialStartOffset != EXTRACT_NOTHING) { 1510 final int N = content.length(); 1511 if (partialStartOffset < 0) { 1512 outText.partialStartOffset = outText.partialEndOffset = -1; 1513 partialStartOffset = 0; 1514 partialEndOffset = N; 1515 } else { 1516 // Now use the delta to determine the actual amount of text 1517 // we need. 1518 partialEndOffset += delta; 1519 // Adjust offsets to ensure we contain full spans. 1520 if (content instanceof Spanned) { 1521 Spanned spanned = (Spanned) content; 1522 Object[] spans = spanned.getSpans(partialStartOffset, 1523 partialEndOffset, ParcelableSpan.class); 1524 int i = spans.length; 1525 while (i > 0) { 1526 i--; 1527 int j = spanned.getSpanStart(spans[i]); 1528 if (j < partialStartOffset) partialStartOffset = j; 1529 j = spanned.getSpanEnd(spans[i]); 1530 if (j > partialEndOffset) partialEndOffset = j; 1531 } 1532 } 1533 outText.partialStartOffset = partialStartOffset; 1534 outText.partialEndOffset = partialEndOffset - delta; 1535 1536 if (partialStartOffset > N) { 1537 partialStartOffset = N; 1538 } else if (partialStartOffset < 0) { 1539 partialStartOffset = 0; 1540 } 1541 if (partialEndOffset > N) { 1542 partialEndOffset = N; 1543 } else if (partialEndOffset < 0) { 1544 partialEndOffset = 0; 1545 } 1546 } 1547 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1548 outText.text = content.subSequence(partialStartOffset, 1549 partialEndOffset); 1550 } else { 1551 outText.text = TextUtils.substring(content, partialStartOffset, 1552 partialEndOffset); 1553 } 1554 } else { 1555 outText.partialStartOffset = 0; 1556 outText.partialEndOffset = 0; 1557 outText.text = ""; 1558 } 1559 outText.flags = 0; 1560 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1561 outText.flags |= ExtractedText.FLAG_SELECTING; 1562 } 1563 if (mTextView.isSingleLine()) { 1564 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1565 } 1566 outText.startOffset = 0; 1567 outText.selectionStart = mTextView.getSelectionStart(); 1568 outText.selectionEnd = mTextView.getSelectionEnd(); 1569 return true; 1570 } 1571 1572 boolean reportExtractedText() { 1573 final Editor.InputMethodState ims = mInputMethodState; 1574 if (ims != null) { 1575 final boolean contentChanged = ims.mContentChanged; 1576 if (contentChanged || ims.mSelectionModeChanged) { 1577 ims.mContentChanged = false; 1578 ims.mSelectionModeChanged = false; 1579 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1580 if (req != null) { 1581 InputMethodManager imm = InputMethodManager.peekInstance(); 1582 if (imm != null) { 1583 if (TextView.DEBUG_EXTRACT) { 1584 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1585 + ims.mChangedStart 1586 + " end=" + ims.mChangedEnd 1587 + " delta=" + ims.mChangedDelta); 1588 } 1589 if (ims.mChangedStart < 0 && !contentChanged) { 1590 ims.mChangedStart = EXTRACT_NOTHING; 1591 } 1592 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1593 ims.mChangedDelta, ims.mExtractedText)) { 1594 if (TextView.DEBUG_EXTRACT) { 1595 Log.v(TextView.LOG_TAG, 1596 "Reporting extracted start=" 1597 + ims.mExtractedText.partialStartOffset 1598 + " end=" + ims.mExtractedText.partialEndOffset 1599 + ": " + ims.mExtractedText.text); 1600 } 1601 1602 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1603 ims.mChangedStart = EXTRACT_UNKNOWN; 1604 ims.mChangedEnd = EXTRACT_UNKNOWN; 1605 ims.mChangedDelta = 0; 1606 ims.mContentChanged = false; 1607 return true; 1608 } 1609 } 1610 } 1611 } 1612 } 1613 return false; 1614 } 1615 1616 private void sendUpdateSelection() { 1617 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1618 final InputMethodManager imm = InputMethodManager.peekInstance(); 1619 if (null != imm) { 1620 final int selectionStart = mTextView.getSelectionStart(); 1621 final int selectionEnd = mTextView.getSelectionEnd(); 1622 int candStart = -1; 1623 int candEnd = -1; 1624 if (mTextView.getText() instanceof Spannable) { 1625 final Spannable sp = (Spannable) mTextView.getText(); 1626 candStart = EditableInputConnection.getComposingSpanStart(sp); 1627 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1628 } 1629 // InputMethodManager#updateSelection skips sending the message if 1630 // none of the parameters have changed since the last time we called it. 1631 imm.updateSelection(mTextView, 1632 selectionStart, selectionEnd, candStart, candEnd); 1633 } 1634 } 1635 } 1636 1637 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1638 int cursorOffsetVertical) { 1639 final int selectionStart = mTextView.getSelectionStart(); 1640 final int selectionEnd = mTextView.getSelectionEnd(); 1641 1642 final InputMethodState ims = mInputMethodState; 1643 if (ims != null && ims.mBatchEditNesting == 0) { 1644 InputMethodManager imm = InputMethodManager.peekInstance(); 1645 if (imm != null) { 1646 if (imm.isActive(mTextView)) { 1647 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1648 // We are in extract mode and the content has changed 1649 // in some way... just report complete new text to the 1650 // input method. 1651 reportExtractedText(); 1652 } 1653 } 1654 } 1655 } 1656 1657 if (mCorrectionHighlighter != null) { 1658 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1659 } 1660 1661 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1662 drawCursor(canvas, cursorOffsetVertical); 1663 // Rely on the drawable entirely, do not draw the cursor line. 1664 // Has to be done after the IMM related code above which relies on the highlight. 1665 highlight = null; 1666 } 1667 1668 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1669 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1670 cursorOffsetVertical); 1671 } else { 1672 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1673 } 1674 } 1675 1676 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1677 Paint highlightPaint, int cursorOffsetVertical) { 1678 final long lineRange = layout.getLineRangeForDraw(canvas); 1679 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1680 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1681 if (lastLine < 0) return; 1682 1683 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1684 firstLine, lastLine); 1685 1686 if (layout instanceof DynamicLayout) { 1687 if (mTextRenderNodes == null) { 1688 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1689 } 1690 1691 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1692 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1693 int[] blockIndices = dynamicLayout.getBlockIndices(); 1694 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1695 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1696 1697 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1698 if (blockSet != null) { 1699 for (int i = 0; i < blockSet.size(); i++) { 1700 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1701 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1702 && mTextRenderNodes[blockIndex] != null) { 1703 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1704 } 1705 } 1706 } 1707 1708 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1709 if (startBlock < 0) { 1710 startBlock = -(startBlock + 1); 1711 } 1712 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1713 1714 int startIndexToFindAvailableRenderNode = 0; 1715 int lastIndex = numberOfBlocks; 1716 1717 for (int i = startBlock; i < numberOfBlocks; i++) { 1718 final int blockIndex = blockIndices[i]; 1719 if (i >= indexFirstChangedBlock 1720 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1721 && mTextRenderNodes[blockIndex] != null) { 1722 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1723 } 1724 if (blockEndLines[i] < firstLine) { 1725 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1726 // be redrawn after they get scrolled into drawing range. 1727 continue; 1728 } 1729 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1730 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1731 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1732 if (blockEndLines[i] >= lastLine) { 1733 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1734 break; 1735 } 1736 } 1737 if (blockSet != null) { 1738 for (int i = 0; i < blockSet.size(); i++) { 1739 final int block = blockSet.valueAt(i); 1740 final int blockIndex = dynamicLayout.getBlockIndex(block); 1741 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1742 || mTextRenderNodes[blockIndex] == null 1743 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1744 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1745 layout, highlight, highlightPaint, cursorOffsetVertical, 1746 blockEndLines, blockIndices, block, numberOfBlocks, 1747 startIndexToFindAvailableRenderNode); 1748 } 1749 } 1750 } 1751 1752 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1753 } else { 1754 // Boring layout is used for empty and hint text 1755 layout.drawText(canvas, firstLine, lastLine); 1756 } 1757 } 1758 1759 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1760 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1761 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1762 int startIndexToFindAvailableRenderNode) { 1763 final int blockEndLine = blockEndLines[blockInfoIndex]; 1764 int blockIndex = blockIndices[blockInfoIndex]; 1765 1766 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1767 if (blockIsInvalid) { 1768 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1769 startIndexToFindAvailableRenderNode); 1770 // Note how dynamic layout's internal block indices get updated from Editor 1771 blockIndices[blockInfoIndex] = blockIndex; 1772 if (mTextRenderNodes[blockIndex] != null) { 1773 mTextRenderNodes[blockIndex].isDirty = true; 1774 } 1775 startIndexToFindAvailableRenderNode = blockIndex + 1; 1776 } 1777 1778 if (mTextRenderNodes[blockIndex] == null) { 1779 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1780 } 1781 1782 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1783 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1784 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1785 final int blockBeginLine = blockInfoIndex == 0 ? 1786 0 : blockEndLines[blockInfoIndex - 1] + 1; 1787 final int top = layout.getLineTop(blockBeginLine); 1788 final int bottom = layout.getLineBottom(blockEndLine); 1789 int left = 0; 1790 int right = mTextView.getWidth(); 1791 if (mTextView.getHorizontallyScrolling()) { 1792 float min = Float.MAX_VALUE; 1793 float max = Float.MIN_VALUE; 1794 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1795 min = Math.min(min, layout.getLineLeft(line)); 1796 max = Math.max(max, layout.getLineRight(line)); 1797 } 1798 left = (int) min; 1799 right = (int) (max + 0.5f); 1800 } 1801 1802 // Rebuild display list if it is invalid 1803 if (blockDisplayListIsInvalid) { 1804 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1805 right - left, bottom - top); 1806 try { 1807 // drawText is always relative to TextView's origin, this translation 1808 // brings this range of text back to the top left corner of the viewport 1809 displayListCanvas.translate(-left, -top); 1810 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1811 mTextRenderNodes[blockIndex].isDirty = false; 1812 // No need to untranslate, previous context is popped after 1813 // drawDisplayList 1814 } finally { 1815 blockDisplayList.end(displayListCanvas); 1816 // Same as drawDisplayList below, handled by our TextView's parent 1817 blockDisplayList.setClipToBounds(false); 1818 } 1819 } 1820 1821 // Valid display list only needs to update its drawing location. 1822 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1823 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1824 } 1825 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1826 return startIndexToFindAvailableRenderNode; 1827 } 1828 1829 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1830 int searchStartIndex) { 1831 int length = mTextRenderNodes.length; 1832 for (int i = searchStartIndex; i < length; i++) { 1833 boolean blockIndexFound = false; 1834 for (int j = 0; j < numberOfBlocks; j++) { 1835 if (blockIndices[j] == i) { 1836 blockIndexFound = true; 1837 break; 1838 } 1839 } 1840 if (blockIndexFound) continue; 1841 return i; 1842 } 1843 1844 // No available index found, the pool has to grow 1845 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1846 return length; 1847 } 1848 1849 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1850 final boolean translate = cursorOffsetVertical != 0; 1851 if (translate) canvas.translate(0, cursorOffsetVertical); 1852 for (int i = 0; i < mCursorCount; i++) { 1853 mCursorDrawable[i].draw(canvas); 1854 } 1855 if (translate) canvas.translate(0, -cursorOffsetVertical); 1856 } 1857 1858 void invalidateHandlesAndActionMode() { 1859 if (mSelectionModifierCursorController != null) { 1860 mSelectionModifierCursorController.invalidateHandles(); 1861 } 1862 if (mInsertionPointCursorController != null) { 1863 mInsertionPointCursorController.invalidateHandle(); 1864 } 1865 if (mTextActionMode != null) { 1866 invalidateActionMode(); 1867 } 1868 } 1869 1870 /** 1871 * Invalidates all the sub-display lists that overlap the specified character range 1872 */ 1873 void invalidateTextDisplayList(Layout layout, int start, int end) { 1874 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1875 final int firstLine = layout.getLineForOffset(start); 1876 final int lastLine = layout.getLineForOffset(end); 1877 1878 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1879 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1880 int[] blockIndices = dynamicLayout.getBlockIndices(); 1881 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1882 1883 int i = 0; 1884 // Skip the blocks before firstLine 1885 while (i < numberOfBlocks) { 1886 if (blockEndLines[i] >= firstLine) break; 1887 i++; 1888 } 1889 1890 // Invalidate all subsequent blocks until lastLine is passed 1891 while (i < numberOfBlocks) { 1892 final int blockIndex = blockIndices[i]; 1893 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1894 mTextRenderNodes[blockIndex].isDirty = true; 1895 } 1896 if (blockEndLines[i] >= lastLine) break; 1897 i++; 1898 } 1899 } 1900 } 1901 1902 void invalidateTextDisplayList() { 1903 if (mTextRenderNodes != null) { 1904 for (int i = 0; i < mTextRenderNodes.length; i++) { 1905 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1906 } 1907 } 1908 } 1909 1910 void updateCursorsPositions() { 1911 if (mTextView.mCursorDrawableRes == 0) { 1912 mCursorCount = 0; 1913 return; 1914 } 1915 1916 Layout layout = mTextView.getLayout(); 1917 final int offset = mTextView.getSelectionStart(); 1918 final int line = layout.getLineForOffset(offset); 1919 final int top = layout.getLineTop(line); 1920 final int bottom = layout.getLineTop(line + 1); 1921 1922 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1923 1924 int middle = bottom; 1925 if (mCursorCount == 2) { 1926 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1927 middle = (top + bottom) >> 1; 1928 } 1929 1930 boolean clamped = layout.shouldClampCursor(line); 1931 updateCursorPosition(0, top, middle, layout.getPrimaryHorizontal(offset, clamped)); 1932 1933 if (mCursorCount == 2) { 1934 updateCursorPosition(1, middle, bottom, layout.getSecondaryHorizontal(offset, clamped)); 1935 } 1936 } 1937 1938 void refreshTextActionMode() { 1939 if (extractedTextModeWillBeStarted()) { 1940 mRestartActionModeOnNextRefresh = false; 1941 return; 1942 } 1943 final boolean hasSelection = mTextView.hasSelection(); 1944 final SelectionModifierCursorController selectionController = getSelectionController(); 1945 final InsertionPointCursorController insertionController = getInsertionController(); 1946 if ((selectionController != null && selectionController.isCursorBeingModified()) 1947 || (insertionController != null && insertionController.isCursorBeingModified())) { 1948 // ActionMode should be managed by the currently active cursor controller. 1949 mRestartActionModeOnNextRefresh = false; 1950 return; 1951 } 1952 if (hasSelection) { 1953 hideInsertionPointCursorController(); 1954 if (mTextActionMode == null) { 1955 if (mRestartActionModeOnNextRefresh) { 1956 // To avoid distraction, newly start action mode only when selection action 1957 // mode is being restarted. 1958 startSelectionActionModeAsync(false); 1959 } 1960 } else if (selectionController == null || !selectionController.isActive()) { 1961 // Insertion action mode is active. Avoid dismissing the selection. 1962 stopTextActionModeWithPreservingSelection(); 1963 startSelectionActionModeAsync(false); 1964 } else { 1965 mTextActionMode.invalidateContentRect(); 1966 } 1967 } else { 1968 // Insertion action mode is started only when insertion controller is explicitly 1969 // activated. 1970 if (insertionController == null || !insertionController.isActive()) { 1971 stopTextActionMode(); 1972 } else if (mTextActionMode != null) { 1973 mTextActionMode.invalidateContentRect(); 1974 } 1975 } 1976 mRestartActionModeOnNextRefresh = false; 1977 } 1978 1979 /** 1980 * Start an Insertion action mode. 1981 */ 1982 void startInsertionActionMode() { 1983 if (mInsertionActionModeRunnable != null) { 1984 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1985 } 1986 if (extractedTextModeWillBeStarted()) { 1987 return; 1988 } 1989 stopTextActionMode(); 1990 1991 ActionMode.Callback actionModeCallback = 1992 new TextActionModeCallback(false /* hasSelection */); 1993 mTextActionMode = mTextView.startActionMode( 1994 actionModeCallback, ActionMode.TYPE_FLOATING); 1995 if (mTextActionMode != null && getInsertionController() != null) { 1996 getInsertionController().show(); 1997 } 1998 } 1999 2000 @NonNull 2001 TextView getTextView() { 2002 return mTextView; 2003 } 2004 2005 @Nullable 2006 ActionMode getTextActionMode() { 2007 return mTextActionMode; 2008 } 2009 2010 void setRestartActionModeOnNextRefresh(boolean value) { 2011 mRestartActionModeOnNextRefresh = value; 2012 } 2013 2014 /** 2015 * Asynchronously starts a selection action mode using the TextClassifier. 2016 */ 2017 void startSelectionActionModeAsync(boolean adjustSelection) { 2018 getSelectionActionModeHelper().startActionModeAsync(adjustSelection); 2019 } 2020 2021 /** 2022 * Asynchronously invalidates an action mode using the TextClassifier. 2023 */ 2024 void invalidateActionModeAsync() { 2025 getSelectionActionModeHelper().invalidateActionModeAsync(); 2026 } 2027 2028 /** 2029 * Synchronously invalidates an action mode without the TextClassifier. 2030 */ 2031 private void invalidateActionMode() { 2032 if (mTextActionMode != null) { 2033 mTextActionMode.invalidate(); 2034 } 2035 } 2036 2037 private SelectionActionModeHelper getSelectionActionModeHelper() { 2038 if (mSelectionActionModeHelper == null) { 2039 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2040 } 2041 return mSelectionActionModeHelper; 2042 } 2043 2044 /** 2045 * If the TextView allows text selection, selects the current word when no existing selection 2046 * was available and starts a drag. 2047 * 2048 * @return true if the drag was started. 2049 */ 2050 private boolean selectCurrentWordAndStartDrag() { 2051 if (mInsertionActionModeRunnable != null) { 2052 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2053 } 2054 if (extractedTextModeWillBeStarted()) { 2055 return false; 2056 } 2057 if (!checkField()) { 2058 return false; 2059 } 2060 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2061 // No selection and cannot select a word. 2062 return false; 2063 } 2064 stopTextActionModeWithPreservingSelection(); 2065 getSelectionController().enterDrag( 2066 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2067 return true; 2068 } 2069 2070 /** 2071 * Checks whether a selection can be performed on the current TextView. 2072 * 2073 * @return true if a selection can be performed 2074 */ 2075 boolean checkField() { 2076 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2077 Log.w(TextView.LOG_TAG, 2078 "TextView does not support text selection. Selection cancelled."); 2079 return false; 2080 } 2081 return true; 2082 } 2083 2084 boolean startSelectionActionModeInternal() { 2085 if (extractedTextModeWillBeStarted()) { 2086 return false; 2087 } 2088 if (mTextActionMode != null) { 2089 // Text action mode is already started 2090 invalidateActionMode(); 2091 return false; 2092 } 2093 2094 if (!checkField() || !mTextView.hasSelection()) { 2095 return false; 2096 } 2097 2098 ActionMode.Callback actionModeCallback = 2099 new TextActionModeCallback(true /* hasSelection */); 2100 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2101 2102 final boolean selectionStarted = mTextActionMode != null; 2103 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2104 // Show the IME to be able to replace text, except when selecting non editable text. 2105 final InputMethodManager imm = InputMethodManager.peekInstance(); 2106 if (imm != null) { 2107 imm.showSoftInput(mTextView, 0, null); 2108 } 2109 } 2110 return selectionStarted; 2111 } 2112 2113 private boolean extractedTextModeWillBeStarted() { 2114 if (!(mTextView.isInExtractedMode())) { 2115 final InputMethodManager imm = InputMethodManager.peekInstance(); 2116 return imm != null && imm.isFullscreenMode(); 2117 } 2118 return false; 2119 } 2120 2121 /** 2122 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2123 * the current cursor position or selection range. This method is consistent with the 2124 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2125 */ 2126 private boolean shouldOfferToShowSuggestions() { 2127 CharSequence text = mTextView.getText(); 2128 if (!(text instanceof Spannable)) return false; 2129 2130 final Spannable spannable = (Spannable) text; 2131 final int selectionStart = mTextView.getSelectionStart(); 2132 final int selectionEnd = mTextView.getSelectionEnd(); 2133 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2134 SuggestionSpan.class); 2135 if (suggestionSpans.length == 0) { 2136 return false; 2137 } 2138 if (selectionStart == selectionEnd) { 2139 // Spans overlap the cursor. 2140 for (int i = 0; i < suggestionSpans.length; i++) { 2141 if (suggestionSpans[i].getSuggestions().length > 0) { 2142 return true; 2143 } 2144 } 2145 return false; 2146 } 2147 int minSpanStart = mTextView.getText().length(); 2148 int maxSpanEnd = 0; 2149 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2150 int unionOfSpansCoveringSelectionStartEnd = 0; 2151 boolean hasValidSuggestions = false; 2152 for (int i = 0; i < suggestionSpans.length; i++) { 2153 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2154 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2155 minSpanStart = Math.min(minSpanStart, spanStart); 2156 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2157 if (selectionStart < spanStart || selectionStart > spanEnd) { 2158 // The span doesn't cover the current selection start point. 2159 continue; 2160 } 2161 hasValidSuggestions = 2162 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2163 unionOfSpansCoveringSelectionStartStart = 2164 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2165 unionOfSpansCoveringSelectionStartEnd = 2166 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2167 } 2168 if (!hasValidSuggestions) { 2169 return false; 2170 } 2171 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2172 // No spans cover the selection start point. 2173 return false; 2174 } 2175 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2176 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2177 // There is a span that is not covered by the union. In this case, we soouldn't offer 2178 // to show suggestions as it's confusing. 2179 return false; 2180 } 2181 return true; 2182 } 2183 2184 /** 2185 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2186 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2187 */ 2188 private boolean isCursorInsideEasyCorrectionSpan() { 2189 Spannable spannable = (Spannable) mTextView.getText(); 2190 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2191 mTextView.getSelectionEnd(), SuggestionSpan.class); 2192 for (int i = 0; i < suggestionSpans.length; i++) { 2193 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2194 return true; 2195 } 2196 } 2197 return false; 2198 } 2199 2200 void onTouchUpEvent(MotionEvent event) { 2201 if (getSelectionActionModeHelper().resetSelection( 2202 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2203 return; 2204 } 2205 2206 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2207 hideCursorAndSpanControllers(); 2208 stopTextActionMode(); 2209 CharSequence text = mTextView.getText(); 2210 if (!selectAllGotFocus && text.length() > 0) { 2211 // Move cursor 2212 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2213 Selection.setSelection((Spannable) text, offset); 2214 if (mSpellChecker != null) { 2215 // When the cursor moves, the word that was typed may need spell check 2216 mSpellChecker.onSelectionChanged(); 2217 } 2218 2219 if (!extractedTextModeWillBeStarted()) { 2220 if (isCursorInsideEasyCorrectionSpan()) { 2221 // Cancel the single tap delayed runnable. 2222 if (mInsertionActionModeRunnable != null) { 2223 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2224 } 2225 2226 mShowSuggestionRunnable = new Runnable() { 2227 public void run() { 2228 replace(); 2229 } 2230 }; 2231 // removeCallbacks is performed on every touch 2232 mTextView.postDelayed(mShowSuggestionRunnable, 2233 ViewConfiguration.getDoubleTapTimeout()); 2234 } else if (hasInsertionController()) { 2235 getInsertionController().show(); 2236 } 2237 } 2238 } 2239 } 2240 2241 protected void stopTextActionMode() { 2242 if (mTextActionMode != null) { 2243 // This will hide the mSelectionModifierCursorController 2244 mTextActionMode.finish(); 2245 } 2246 } 2247 2248 private void stopTextActionModeWithPreservingSelection() { 2249 if (mTextActionMode != null) { 2250 mRestartActionModeOnNextRefresh = true; 2251 } 2252 mPreserveSelection = true; 2253 stopTextActionMode(); 2254 mPreserveSelection = false; 2255 } 2256 2257 /** 2258 * @return True if this view supports insertion handles. 2259 */ 2260 boolean hasInsertionController() { 2261 return mInsertionControllerEnabled; 2262 } 2263 2264 /** 2265 * @return True if this view supports selection handles. 2266 */ 2267 boolean hasSelectionController() { 2268 return mSelectionControllerEnabled; 2269 } 2270 2271 private InsertionPointCursorController getInsertionController() { 2272 if (!mInsertionControllerEnabled) { 2273 return null; 2274 } 2275 2276 if (mInsertionPointCursorController == null) { 2277 mInsertionPointCursorController = new InsertionPointCursorController(); 2278 2279 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2280 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2281 } 2282 2283 return mInsertionPointCursorController; 2284 } 2285 2286 @Nullable 2287 SelectionModifierCursorController getSelectionController() { 2288 if (!mSelectionControllerEnabled) { 2289 return null; 2290 } 2291 2292 if (mSelectionModifierCursorController == null) { 2293 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2294 2295 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2296 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2297 } 2298 2299 return mSelectionModifierCursorController; 2300 } 2301 2302 @VisibleForTesting 2303 public Drawable[] getCursorDrawable() { 2304 return mCursorDrawable; 2305 } 2306 2307 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2308 if (mCursorDrawable[cursorIndex] == null) { 2309 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2310 mTextView.mCursorDrawableRes); 2311 } 2312 final Drawable drawable = mCursorDrawable[cursorIndex]; 2313 final int left = clampHorizontalPosition(drawable, horizontal); 2314 final int width = drawable.getIntrinsicWidth(); 2315 drawable.setBounds(left, top - mTempRect.top, left + width, 2316 bottom + mTempRect.bottom); 2317 } 2318 2319 /** 2320 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2321 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2322 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2323 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2324 * of the view. 2325 * 2326 * @param drawable Drawable. Can be null. 2327 * @param horizontal Horizontal position for the drawable. 2328 * @return The clamped horizontal position for the drawable. 2329 */ 2330 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2331 horizontal = Math.max(0.5f, horizontal - 0.5f); 2332 if (mTempRect == null) mTempRect = new Rect(); 2333 2334 int drawableWidth = 0; 2335 if (drawable != null) { 2336 drawable.getPadding(mTempRect); 2337 drawableWidth = drawable.getIntrinsicWidth(); 2338 } else { 2339 mTempRect.setEmpty(); 2340 } 2341 2342 int scrollX = mTextView.getScrollX(); 2343 float horizontalDiff = horizontal - scrollX; 2344 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2345 - mTextView.getCompoundPaddingRight(); 2346 2347 final int left; 2348 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2349 // at the rightmost position 2350 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2351 } else if (Math.abs(horizontalDiff) <= 1f 2352 || (TextUtils.isEmpty(mTextView.getText()) 2353 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2354 && horizontal <= 1f)) { 2355 // at the leftmost position 2356 left = scrollX - mTempRect.left; 2357 } else { 2358 left = (int) horizontal - mTempRect.left; 2359 } 2360 return left; 2361 } 2362 2363 /** 2364 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2365 * a dictionary) from the current input method, provided by it calling 2366 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2367 * implementation flashes the background of the corrected word to provide feedback to the user. 2368 * 2369 * @param info The auto correct info about the text that was corrected. 2370 */ 2371 public void onCommitCorrection(CorrectionInfo info) { 2372 if (mCorrectionHighlighter == null) { 2373 mCorrectionHighlighter = new CorrectionHighlighter(); 2374 } else { 2375 mCorrectionHighlighter.invalidate(false); 2376 } 2377 2378 mCorrectionHighlighter.highlight(info); 2379 mUndoInputFilter.freezeLastEdit(); 2380 } 2381 2382 void onScrollChanged() { 2383 if (mPositionListener != null) { 2384 mPositionListener.onScrollChanged(); 2385 } 2386 if (mTextActionMode != null) { 2387 mTextActionMode.invalidateContentRect(); 2388 } 2389 } 2390 2391 /** 2392 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2393 */ 2394 private boolean shouldBlink() { 2395 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2396 2397 final int start = mTextView.getSelectionStart(); 2398 if (start < 0) return false; 2399 2400 final int end = mTextView.getSelectionEnd(); 2401 if (end < 0) return false; 2402 2403 return start == end; 2404 } 2405 2406 void makeBlink() { 2407 if (shouldBlink()) { 2408 mShowCursor = SystemClock.uptimeMillis(); 2409 if (mBlink == null) mBlink = new Blink(); 2410 mTextView.removeCallbacks(mBlink); 2411 mTextView.postDelayed(mBlink, BLINK); 2412 } else { 2413 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2414 } 2415 } 2416 2417 private class Blink implements Runnable { 2418 private boolean mCancelled; 2419 2420 public void run() { 2421 if (mCancelled) { 2422 return; 2423 } 2424 2425 mTextView.removeCallbacks(this); 2426 2427 if (shouldBlink()) { 2428 if (mTextView.getLayout() != null) { 2429 mTextView.invalidateCursorPath(); 2430 } 2431 2432 mTextView.postDelayed(this, BLINK); 2433 } 2434 } 2435 2436 void cancel() { 2437 if (!mCancelled) { 2438 mTextView.removeCallbacks(this); 2439 mCancelled = true; 2440 } 2441 } 2442 2443 void uncancel() { 2444 mCancelled = false; 2445 } 2446 } 2447 2448 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2449 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2450 com.android.internal.R.layout.text_drag_thumbnail, null); 2451 2452 if (shadowView == null) { 2453 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2454 } 2455 2456 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2457 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2458 end = TextUtils.unpackRangeEndFromLong(range); 2459 } 2460 final CharSequence text = mTextView.getTransformedText(start, end); 2461 shadowView.setText(text); 2462 shadowView.setTextColor(mTextView.getTextColors()); 2463 2464 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2465 shadowView.setGravity(Gravity.CENTER); 2466 2467 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2468 ViewGroup.LayoutParams.WRAP_CONTENT)); 2469 2470 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2471 shadowView.measure(size, size); 2472 2473 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2474 shadowView.invalidate(); 2475 return new DragShadowBuilder(shadowView); 2476 } 2477 2478 private static class DragLocalState { 2479 public TextView sourceTextView; 2480 public int start, end; 2481 2482 public DragLocalState(TextView sourceTextView, int start, int end) { 2483 this.sourceTextView = sourceTextView; 2484 this.start = start; 2485 this.end = end; 2486 } 2487 } 2488 2489 void onDrop(DragEvent event) { 2490 SpannableStringBuilder content = new SpannableStringBuilder(); 2491 2492 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2493 if (permissions != null) { 2494 permissions.takeTransient(); 2495 } 2496 2497 try { 2498 ClipData clipData = event.getClipData(); 2499 final int itemCount = clipData.getItemCount(); 2500 for (int i = 0; i < itemCount; i++) { 2501 Item item = clipData.getItemAt(i); 2502 content.append(item.coerceToStyledText(mTextView.getContext())); 2503 } 2504 } finally { 2505 if (permissions != null) { 2506 permissions.release(); 2507 } 2508 } 2509 2510 mTextView.beginBatchEdit(); 2511 mUndoInputFilter.freezeLastEdit(); 2512 try { 2513 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2514 Object localState = event.getLocalState(); 2515 DragLocalState dragLocalState = null; 2516 if (localState instanceof DragLocalState) { 2517 dragLocalState = (DragLocalState) localState; 2518 } 2519 boolean dragDropIntoItself = dragLocalState != null 2520 && dragLocalState.sourceTextView == mTextView; 2521 2522 if (dragDropIntoItself) { 2523 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2524 // A drop inside the original selection discards the drop. 2525 return; 2526 } 2527 } 2528 2529 final int originalLength = mTextView.getText().length(); 2530 int min = offset; 2531 int max = offset; 2532 2533 Selection.setSelection((Spannable) mTextView.getText(), max); 2534 mTextView.replaceText_internal(min, max, content); 2535 2536 if (dragDropIntoItself) { 2537 int dragSourceStart = dragLocalState.start; 2538 int dragSourceEnd = dragLocalState.end; 2539 if (max <= dragSourceStart) { 2540 // Inserting text before selection has shifted positions 2541 final int shift = mTextView.getText().length() - originalLength; 2542 dragSourceStart += shift; 2543 dragSourceEnd += shift; 2544 } 2545 2546 // Delete original selection 2547 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2548 2549 // Make sure we do not leave two adjacent spaces. 2550 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2551 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2552 if (nextCharIdx > prevCharIdx + 1) { 2553 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2554 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2555 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2556 } 2557 } 2558 } 2559 } finally { 2560 mTextView.endBatchEdit(); 2561 mUndoInputFilter.freezeLastEdit(); 2562 } 2563 } 2564 2565 public void addSpanWatchers(Spannable text) { 2566 final int textLength = text.length(); 2567 2568 if (mKeyListener != null) { 2569 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2570 } 2571 2572 if (mSpanController == null) { 2573 mSpanController = new SpanController(); 2574 } 2575 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2576 } 2577 2578 void setContextMenuAnchor(float x, float y) { 2579 mContextMenuAnchorX = x; 2580 mContextMenuAnchorY = y; 2581 } 2582 2583 void onCreateContextMenu(ContextMenu menu) { 2584 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2585 || Float.isNaN(mContextMenuAnchorY)) { 2586 return; 2587 } 2588 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2589 if (offset == -1) { 2590 return; 2591 } 2592 2593 stopTextActionModeWithPreservingSelection(); 2594 if (mTextView.canSelectText()) { 2595 final boolean isOnSelection = mTextView.hasSelection() 2596 && offset >= mTextView.getSelectionStart() 2597 && offset <= mTextView.getSelectionEnd(); 2598 if (!isOnSelection) { 2599 // Right clicked position is not on the selection. Remove the selection and move the 2600 // cursor to the right clicked position. 2601 Selection.setSelection((Spannable) mTextView.getText(), offset); 2602 stopTextActionMode(); 2603 } 2604 } 2605 2606 if (shouldOfferToShowSuggestions()) { 2607 final SuggestionInfo[] suggestionInfoArray = 2608 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2609 for (int i = 0; i < suggestionInfoArray.length; i++) { 2610 suggestionInfoArray[i] = new SuggestionInfo(); 2611 } 2612 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2613 com.android.internal.R.string.replace); 2614 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2615 for (int i = 0; i < numItems; i++) { 2616 final SuggestionInfo info = suggestionInfoArray[i]; 2617 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2618 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2619 @Override 2620 public boolean onMenuItemClick(MenuItem item) { 2621 replaceWithSuggestion(info); 2622 return true; 2623 } 2624 }); 2625 } 2626 } 2627 2628 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2629 com.android.internal.R.string.undo) 2630 .setAlphabeticShortcut('z') 2631 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2632 .setEnabled(mTextView.canUndo()); 2633 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2634 com.android.internal.R.string.redo) 2635 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2636 .setEnabled(mTextView.canRedo()); 2637 2638 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2639 com.android.internal.R.string.cut) 2640 .setAlphabeticShortcut('x') 2641 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2642 .setEnabled(mTextView.canCut()); 2643 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2644 com.android.internal.R.string.copy) 2645 .setAlphabeticShortcut('c') 2646 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2647 .setEnabled(mTextView.canCopy()); 2648 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2649 com.android.internal.R.string.paste) 2650 .setAlphabeticShortcut('v') 2651 .setEnabled(mTextView.canPaste()) 2652 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2653 menu.add(Menu.NONE, TextView.ID_PASTE_AS_PLAIN_TEXT, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2654 com.android.internal.R.string.paste_as_plain_text) 2655 .setEnabled(mTextView.canPasteAsPlainText()) 2656 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2657 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2658 com.android.internal.R.string.share) 2659 .setEnabled(mTextView.canShare()) 2660 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2661 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2662 com.android.internal.R.string.selectAll) 2663 .setAlphabeticShortcut('a') 2664 .setEnabled(mTextView.canSelectAllText()) 2665 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2666 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2667 android.R.string.autofill) 2668 .setEnabled(mTextView.canRequestAutofill()) 2669 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2670 2671 mPreserveSelection = true; 2672 } 2673 2674 @Nullable 2675 private SuggestionSpan findEquivalentSuggestionSpan( 2676 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2677 final Editable editable = (Editable) mTextView.getText(); 2678 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2679 // Exactly same span is found. 2680 return suggestionSpanInfo.mSuggestionSpan; 2681 } 2682 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2683 // contents. 2684 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2685 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2686 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2687 final int start = editable.getSpanStart(suggestionSpan); 2688 if (start != suggestionSpanInfo.mSpanStart) { 2689 continue; 2690 } 2691 final int end = editable.getSpanEnd(suggestionSpan); 2692 if (end != suggestionSpanInfo.mSpanEnd) { 2693 continue; 2694 } 2695 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2696 return suggestionSpan; 2697 } 2698 } 2699 return null; 2700 } 2701 2702 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2703 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2704 suggestionInfo.mSuggestionSpanInfo); 2705 if (targetSuggestionSpan == null) { 2706 // Span has been removed 2707 return; 2708 } 2709 final Editable editable = (Editable) mTextView.getText(); 2710 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2711 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2712 if (spanStart < 0 || spanEnd <= spanStart) { 2713 // Span has been removed 2714 return; 2715 } 2716 2717 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2718 // SuggestionSpans are removed by replace: save them before 2719 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2720 SuggestionSpan.class); 2721 final int length = suggestionSpans.length; 2722 int[] suggestionSpansStarts = new int[length]; 2723 int[] suggestionSpansEnds = new int[length]; 2724 int[] suggestionSpansFlags = new int[length]; 2725 for (int i = 0; i < length; i++) { 2726 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2727 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2728 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2729 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2730 2731 // Remove potential misspelled flags 2732 int suggestionSpanFlags = suggestionSpan.getFlags(); 2733 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2734 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2735 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2736 suggestionSpan.setFlags(suggestionSpanFlags); 2737 } 2738 } 2739 2740 // Notify source IME of the suggestion pick. Do this before swapping texts. 2741 targetSuggestionSpan.notifySelection( 2742 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2743 2744 // Swap text content between actual text and Suggestion span 2745 final int suggestionStart = suggestionInfo.mSuggestionStart; 2746 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2747 final String suggestion = suggestionInfo.mText.subSequence( 2748 suggestionStart, suggestionEnd).toString(); 2749 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2750 2751 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2752 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2753 2754 // Restore previous SuggestionSpans 2755 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2756 for (int i = 0; i < length; i++) { 2757 // Only spans that include the modified region make sense after replacement 2758 // Spans partially included in the replaced region are removed, there is no 2759 // way to assign them a valid range after replacement 2760 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2761 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2762 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2763 } 2764 } 2765 // Move cursor at the end of the replaced word 2766 final int newCursorPosition = spanEnd + lengthDelta; 2767 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2768 } 2769 2770 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2771 new MenuItem.OnMenuItemClickListener() { 2772 @Override 2773 public boolean onMenuItemClick(MenuItem item) { 2774 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2775 return true; 2776 } 2777 return mTextView.onTextContextMenuItem(item.getItemId()); 2778 } 2779 }; 2780 2781 /** 2782 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2783 * pop-up should be displayed. 2784 * Also monitors {@link Selection} to call back to the attached input method. 2785 */ 2786 private class SpanController implements SpanWatcher { 2787 2788 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2789 2790 private EasyEditPopupWindow mPopupWindow; 2791 2792 private Runnable mHidePopup; 2793 2794 // This function is pure but inner classes can't have static functions 2795 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2796 final Object span) { 2797 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2798 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2799 } 2800 2801 @Override 2802 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2803 if (isNonIntermediateSelectionSpan(text, span)) { 2804 sendUpdateSelection(); 2805 } else if (span instanceof EasyEditSpan) { 2806 if (mPopupWindow == null) { 2807 mPopupWindow = new EasyEditPopupWindow(); 2808 mHidePopup = new Runnable() { 2809 @Override 2810 public void run() { 2811 hide(); 2812 } 2813 }; 2814 } 2815 2816 // Make sure there is only at most one EasyEditSpan in the text 2817 if (mPopupWindow.mEasyEditSpan != null) { 2818 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2819 } 2820 2821 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2822 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2823 @Override 2824 public void onDeleteClick(EasyEditSpan span) { 2825 Editable editable = (Editable) mTextView.getText(); 2826 int start = editable.getSpanStart(span); 2827 int end = editable.getSpanEnd(span); 2828 if (start >= 0 && end >= 0) { 2829 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2830 mTextView.deleteText_internal(start, end); 2831 } 2832 editable.removeSpan(span); 2833 } 2834 }); 2835 2836 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2837 // The window is not visible yet, ignore the text change. 2838 return; 2839 } 2840 2841 if (mTextView.getLayout() == null) { 2842 // The view has not been laid out yet, ignore the text change 2843 return; 2844 } 2845 2846 if (extractedTextModeWillBeStarted()) { 2847 // The input is in extract mode. Do not handle the easy edit in 2848 // the original TextView, as the ExtractEditText will do 2849 return; 2850 } 2851 2852 mPopupWindow.show(); 2853 mTextView.removeCallbacks(mHidePopup); 2854 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2855 } 2856 } 2857 2858 @Override 2859 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2860 if (isNonIntermediateSelectionSpan(text, span)) { 2861 sendUpdateSelection(); 2862 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2863 hide(); 2864 } 2865 } 2866 2867 @Override 2868 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2869 int newStart, int newEnd) { 2870 if (isNonIntermediateSelectionSpan(text, span)) { 2871 sendUpdateSelection(); 2872 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2873 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2874 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2875 text.removeSpan(easyEditSpan); 2876 } 2877 } 2878 2879 public void hide() { 2880 if (mPopupWindow != null) { 2881 mPopupWindow.hide(); 2882 mTextView.removeCallbacks(mHidePopup); 2883 } 2884 } 2885 2886 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2887 try { 2888 PendingIntent pendingIntent = span.getPendingIntent(); 2889 if (pendingIntent != null) { 2890 Intent intent = new Intent(); 2891 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2892 pendingIntent.send(mTextView.getContext(), 0, intent); 2893 } 2894 } catch (CanceledException e) { 2895 // This should not happen, as we should try to send the intent only once. 2896 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2897 } 2898 } 2899 } 2900 2901 /** 2902 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2903 */ 2904 private interface EasyEditDeleteListener { 2905 2906 /** 2907 * Clicks the delete pop-up. 2908 */ 2909 void onDeleteClick(EasyEditSpan span); 2910 } 2911 2912 /** 2913 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2914 * by {@link SpanController}. 2915 */ 2916 private class EasyEditPopupWindow extends PinnedPopupWindow 2917 implements OnClickListener { 2918 private static final int POPUP_TEXT_LAYOUT = 2919 com.android.internal.R.layout.text_edit_action_popup_text; 2920 private TextView mDeleteTextView; 2921 private EasyEditSpan mEasyEditSpan; 2922 private EasyEditDeleteListener mOnDeleteListener; 2923 2924 @Override 2925 protected void createPopupWindow() { 2926 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2927 com.android.internal.R.attr.textSelectHandleWindowStyle); 2928 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2929 mPopupWindow.setClippingEnabled(true); 2930 } 2931 2932 @Override 2933 protected void initContentView() { 2934 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2935 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2936 mContentView = linearLayout; 2937 mContentView.setBackgroundResource( 2938 com.android.internal.R.drawable.text_edit_side_paste_window); 2939 2940 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 2941 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2942 2943 LayoutParams wrapContent = new LayoutParams( 2944 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2945 2946 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2947 mDeleteTextView.setLayoutParams(wrapContent); 2948 mDeleteTextView.setText(com.android.internal.R.string.delete); 2949 mDeleteTextView.setOnClickListener(this); 2950 mContentView.addView(mDeleteTextView); 2951 } 2952 2953 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2954 mEasyEditSpan = easyEditSpan; 2955 } 2956 2957 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2958 mOnDeleteListener = listener; 2959 } 2960 2961 @Override 2962 public void onClick(View view) { 2963 if (view == mDeleteTextView 2964 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2965 && mOnDeleteListener != null) { 2966 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2967 } 2968 } 2969 2970 @Override 2971 public void hide() { 2972 if (mEasyEditSpan != null) { 2973 mEasyEditSpan.setDeleteEnabled(false); 2974 } 2975 mOnDeleteListener = null; 2976 super.hide(); 2977 } 2978 2979 @Override 2980 protected int getTextOffset() { 2981 // Place the pop-up at the end of the span 2982 Editable editable = (Editable) mTextView.getText(); 2983 return editable.getSpanEnd(mEasyEditSpan); 2984 } 2985 2986 @Override 2987 protected int getVerticalLocalPosition(int line) { 2988 return mTextView.getLayout().getLineBottom(line); 2989 } 2990 2991 @Override 2992 protected int clipVertically(int positionY) { 2993 // As we display the pop-up below the span, no vertical clipping is required. 2994 return positionY; 2995 } 2996 } 2997 2998 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2999 // 3 handles 3000 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 3001 // 1 CursorAnchorInfoNotifier 3002 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 3003 private TextViewPositionListener[] mPositionListeners = 3004 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 3005 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 3006 private boolean mPositionHasChanged = true; 3007 // Absolute position of the TextView with respect to its parent window 3008 private int mPositionX, mPositionY; 3009 private int mPositionXOnScreen, mPositionYOnScreen; 3010 private int mNumberOfListeners; 3011 private boolean mScrollHasChanged; 3012 final int[] mTempCoords = new int[2]; 3013 3014 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 3015 if (mNumberOfListeners == 0) { 3016 updatePosition(); 3017 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3018 vto.addOnPreDrawListener(this); 3019 } 3020 3021 int emptySlotIndex = -1; 3022 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3023 TextViewPositionListener listener = mPositionListeners[i]; 3024 if (listener == positionListener) { 3025 return; 3026 } else if (emptySlotIndex < 0 && listener == null) { 3027 emptySlotIndex = i; 3028 } 3029 } 3030 3031 mPositionListeners[emptySlotIndex] = positionListener; 3032 mCanMove[emptySlotIndex] = canMove; 3033 mNumberOfListeners++; 3034 } 3035 3036 public void removeSubscriber(TextViewPositionListener positionListener) { 3037 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3038 if (mPositionListeners[i] == positionListener) { 3039 mPositionListeners[i] = null; 3040 mNumberOfListeners--; 3041 break; 3042 } 3043 } 3044 3045 if (mNumberOfListeners == 0) { 3046 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3047 vto.removeOnPreDrawListener(this); 3048 } 3049 } 3050 3051 public int getPositionX() { 3052 return mPositionX; 3053 } 3054 3055 public int getPositionY() { 3056 return mPositionY; 3057 } 3058 3059 public int getPositionXOnScreen() { 3060 return mPositionXOnScreen; 3061 } 3062 3063 public int getPositionYOnScreen() { 3064 return mPositionYOnScreen; 3065 } 3066 3067 @Override 3068 public boolean onPreDraw() { 3069 updatePosition(); 3070 3071 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3072 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3073 TextViewPositionListener positionListener = mPositionListeners[i]; 3074 if (positionListener != null) { 3075 positionListener.updatePosition(mPositionX, mPositionY, 3076 mPositionHasChanged, mScrollHasChanged); 3077 } 3078 } 3079 } 3080 3081 mScrollHasChanged = false; 3082 return true; 3083 } 3084 3085 private void updatePosition() { 3086 mTextView.getLocationInWindow(mTempCoords); 3087 3088 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3089 3090 mPositionX = mTempCoords[0]; 3091 mPositionY = mTempCoords[1]; 3092 3093 mTextView.getLocationOnScreen(mTempCoords); 3094 3095 mPositionXOnScreen = mTempCoords[0]; 3096 mPositionYOnScreen = mTempCoords[1]; 3097 } 3098 3099 public void onScrollChanged() { 3100 mScrollHasChanged = true; 3101 } 3102 } 3103 3104 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3105 protected PopupWindow mPopupWindow; 3106 protected ViewGroup mContentView; 3107 int mPositionX, mPositionY; 3108 int mClippingLimitLeft, mClippingLimitRight; 3109 3110 protected abstract void createPopupWindow(); 3111 protected abstract void initContentView(); 3112 protected abstract int getTextOffset(); 3113 protected abstract int getVerticalLocalPosition(int line); 3114 protected abstract int clipVertically(int positionY); 3115 protected void setUp() { 3116 } 3117 3118 public PinnedPopupWindow() { 3119 // Due to calling subclass methods in base constructor, subclass constructor is not 3120 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3121 // a chance to initialize subclasses, call setUp() method here. 3122 // TODO: It is good to extract non trivial initialization code from constructor. 3123 setUp(); 3124 3125 createPopupWindow(); 3126 3127 mPopupWindow.setWindowLayoutType( 3128 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3129 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3130 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3131 3132 initContentView(); 3133 3134 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3135 ViewGroup.LayoutParams.WRAP_CONTENT); 3136 mContentView.setLayoutParams(wrapContent); 3137 3138 mPopupWindow.setContentView(mContentView); 3139 } 3140 3141 public void show() { 3142 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3143 3144 computeLocalPosition(); 3145 3146 final PositionListener positionListener = getPositionListener(); 3147 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3148 } 3149 3150 protected void measureContent() { 3151 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3152 mContentView.measure( 3153 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3154 View.MeasureSpec.AT_MOST), 3155 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3156 View.MeasureSpec.AT_MOST)); 3157 } 3158 3159 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3160 * positioned according to viewportToContentHorizontalOffset. 3161 * 3162 * This method assumes that mContentView has properly been measured from its content. */ 3163 private void computeLocalPosition() { 3164 measureContent(); 3165 final int width = mContentView.getMeasuredWidth(); 3166 final int offset = getTextOffset(); 3167 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3168 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3169 3170 final int line = mTextView.getLayout().getLineForOffset(offset); 3171 mPositionY = getVerticalLocalPosition(line); 3172 mPositionY += mTextView.viewportToContentVerticalOffset(); 3173 } 3174 3175 private void updatePosition(int parentPositionX, int parentPositionY) { 3176 int positionX = parentPositionX + mPositionX; 3177 int positionY = parentPositionY + mPositionY; 3178 3179 positionY = clipVertically(positionY); 3180 3181 // Horizontal clipping 3182 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3183 final int width = mContentView.getMeasuredWidth(); 3184 positionX = Math.min( 3185 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3186 positionX = Math.max(-mClippingLimitLeft, positionX); 3187 3188 if (isShowing()) { 3189 mPopupWindow.update(positionX, positionY, -1, -1); 3190 } else { 3191 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3192 positionX, positionY); 3193 } 3194 } 3195 3196 public void hide() { 3197 if (!isShowing()) { 3198 return; 3199 } 3200 mPopupWindow.dismiss(); 3201 getPositionListener().removeSubscriber(this); 3202 } 3203 3204 @Override 3205 public void updatePosition(int parentPositionX, int parentPositionY, 3206 boolean parentPositionChanged, boolean parentScrolled) { 3207 // Either parentPositionChanged or parentScrolled is true, check if still visible 3208 if (isShowing() && isOffsetVisible(getTextOffset())) { 3209 if (parentScrolled) computeLocalPosition(); 3210 updatePosition(parentPositionX, parentPositionY); 3211 } else { 3212 hide(); 3213 } 3214 } 3215 3216 public boolean isShowing() { 3217 return mPopupWindow.isShowing(); 3218 } 3219 } 3220 3221 private static final class SuggestionInfo { 3222 // Range of actual suggestion within mText 3223 int mSuggestionStart, mSuggestionEnd; 3224 3225 // The SuggestionSpan that this TextView represents 3226 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3227 3228 // The index of this suggestion inside suggestionSpan 3229 int mSuggestionIndex; 3230 3231 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3232 3233 void clear() { 3234 mSuggestionSpanInfo.clear(); 3235 mText.clear(); 3236 } 3237 3238 // Utility method to set attributes about a SuggestionSpan. 3239 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3240 mSuggestionSpanInfo.mSuggestionSpan = span; 3241 mSuggestionSpanInfo.mSpanStart = spanStart; 3242 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3243 } 3244 } 3245 3246 private static final class SuggestionSpanInfo { 3247 // The SuggestionSpan; 3248 @Nullable 3249 SuggestionSpan mSuggestionSpan; 3250 3251 // The SuggestionSpan start position 3252 int mSpanStart; 3253 3254 // The SuggestionSpan end position 3255 int mSpanEnd; 3256 3257 void clear() { 3258 mSuggestionSpan = null; 3259 } 3260 } 3261 3262 private class SuggestionHelper { 3263 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3264 new SuggestionSpanComparator(); 3265 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3266 new HashMap<SuggestionSpan, Integer>(); 3267 3268 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3269 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3270 final int flag1 = span1.getFlags(); 3271 final int flag2 = span2.getFlags(); 3272 if (flag1 != flag2) { 3273 // The order here should match what is used in updateDrawState 3274 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3275 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3276 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3277 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3278 if (easy1 && !misspelled1) return -1; 3279 if (easy2 && !misspelled2) return 1; 3280 if (misspelled1) return -1; 3281 if (misspelled2) return 1; 3282 } 3283 3284 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3285 } 3286 } 3287 3288 /** 3289 * Returns the suggestion spans that cover the current cursor position. The suggestion 3290 * spans are sorted according to the length of text that they are attached to. 3291 */ 3292 private SuggestionSpan[] getSortedSuggestionSpans() { 3293 int pos = mTextView.getSelectionStart(); 3294 Spannable spannable = (Spannable) mTextView.getText(); 3295 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3296 3297 mSpansLengths.clear(); 3298 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3299 int start = spannable.getSpanStart(suggestionSpan); 3300 int end = spannable.getSpanEnd(suggestionSpan); 3301 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3302 } 3303 3304 // The suggestions are sorted according to their types (easy correction first, then 3305 // misspelled) and to the length of the text that they cover (shorter first). 3306 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3307 mSpansLengths.clear(); 3308 3309 return suggestionSpans; 3310 } 3311 3312 /** 3313 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3314 * position. 3315 * 3316 * @param suggestionInfos SuggestionInfo array the results will be set. 3317 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3318 * @return the number of suggestions actually fetched. 3319 */ 3320 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3321 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3322 final Spannable spannable = (Spannable) mTextView.getText(); 3323 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3324 final int nbSpans = suggestionSpans.length; 3325 if (nbSpans == 0) return 0; 3326 3327 int numberOfSuggestions = 0; 3328 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3329 final int spanStart = spannable.getSpanStart(suggestionSpan); 3330 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3331 3332 if (misspelledSpanInfo != null 3333 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3334 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3335 misspelledSpanInfo.mSpanStart = spanStart; 3336 misspelledSpanInfo.mSpanEnd = spanEnd; 3337 } 3338 3339 final String[] suggestions = suggestionSpan.getSuggestions(); 3340 final int nbSuggestions = suggestions.length; 3341 suggestionLoop: 3342 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3343 final String suggestion = suggestions[suggestionIndex]; 3344 for (int i = 0; i < numberOfSuggestions; i++) { 3345 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3346 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3347 final int otherSpanStart = 3348 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3349 final int otherSpanEnd = 3350 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3351 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3352 continue suggestionLoop; 3353 } 3354 } 3355 } 3356 3357 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3358 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3359 suggestionInfo.mSuggestionIndex = suggestionIndex; 3360 suggestionInfo.mSuggestionStart = 0; 3361 suggestionInfo.mSuggestionEnd = suggestion.length(); 3362 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3363 numberOfSuggestions++; 3364 if (numberOfSuggestions >= suggestionInfos.length) { 3365 return numberOfSuggestions; 3366 } 3367 } 3368 } 3369 return numberOfSuggestions; 3370 } 3371 } 3372 3373 @VisibleForTesting 3374 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3375 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3376 3377 // Key of intent extras for inserting new word into user dictionary. 3378 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3379 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3380 3381 private SuggestionInfo[] mSuggestionInfos; 3382 private int mNumberOfSuggestions; 3383 private boolean mCursorWasVisibleBeforeSuggestions; 3384 private boolean mIsShowingUp = false; 3385 private SuggestionAdapter mSuggestionsAdapter; 3386 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3387 private TextView mAddToDictionaryButton; 3388 private TextView mDeleteButton; 3389 private ListView mSuggestionListView; 3390 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3391 private int mContainerMarginWidth; 3392 private int mContainerMarginTop; 3393 private LinearLayout mContainerView; 3394 private Context mContext; // TODO: Make mContext final. 3395 3396 private class CustomPopupWindow extends PopupWindow { 3397 3398 @Override 3399 public void dismiss() { 3400 if (!isShowing()) { 3401 return; 3402 } 3403 super.dismiss(); 3404 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3405 3406 // Safe cast since show() checks that mTextView.getText() is an Editable 3407 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3408 3409 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3410 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3411 getInsertionController().show(); 3412 } 3413 } 3414 } 3415 3416 public SuggestionsPopupWindow() { 3417 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3418 } 3419 3420 @Override 3421 protected void setUp() { 3422 mContext = applyDefaultTheme(mTextView.getContext()); 3423 mHighlightSpan = new TextAppearanceSpan(mContext, 3424 mTextView.mTextEditSuggestionHighlightStyle); 3425 } 3426 3427 private Context applyDefaultTheme(Context originalContext) { 3428 TypedArray a = originalContext.obtainStyledAttributes( 3429 new int[]{com.android.internal.R.attr.isLightTheme}); 3430 boolean isLightTheme = a.getBoolean(0, true); 3431 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3432 : R.style.ThemeOverlay_Material_Dark; 3433 a.recycle(); 3434 return new ContextThemeWrapper(originalContext, themeId); 3435 } 3436 3437 @Override 3438 protected void createPopupWindow() { 3439 mPopupWindow = new CustomPopupWindow(); 3440 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3441 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3442 mPopupWindow.setFocusable(true); 3443 mPopupWindow.setClippingEnabled(false); 3444 } 3445 3446 @Override 3447 protected void initContentView() { 3448 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3449 Context.LAYOUT_INFLATER_SERVICE); 3450 mContentView = (ViewGroup) inflater.inflate( 3451 mTextView.mTextEditSuggestionContainerLayout, null); 3452 3453 mContainerView = (LinearLayout) mContentView.findViewById( 3454 com.android.internal.R.id.suggestionWindowContainer); 3455 ViewGroup.MarginLayoutParams lp = 3456 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3457 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3458 mContainerMarginTop = lp.topMargin; 3459 mClippingLimitLeft = lp.leftMargin; 3460 mClippingLimitRight = lp.rightMargin; 3461 3462 mSuggestionListView = (ListView) mContentView.findViewById( 3463 com.android.internal.R.id.suggestionContainer); 3464 3465 mSuggestionsAdapter = new SuggestionAdapter(); 3466 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3467 mSuggestionListView.setOnItemClickListener(this); 3468 3469 // Inflate the suggestion items once and for all. 3470 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3471 for (int i = 0; i < mSuggestionInfos.length; i++) { 3472 mSuggestionInfos[i] = new SuggestionInfo(); 3473 } 3474 3475 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3476 com.android.internal.R.id.addToDictionaryButton); 3477 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3478 public void onClick(View v) { 3479 final SuggestionSpan misspelledSpan = 3480 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3481 if (misspelledSpan == null) { 3482 // Span has been removed. 3483 return; 3484 } 3485 final Editable editable = (Editable) mTextView.getText(); 3486 final int spanStart = editable.getSpanStart(misspelledSpan); 3487 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3488 if (spanStart < 0 || spanEnd <= spanStart) { 3489 return; 3490 } 3491 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3492 3493 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3494 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3495 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3496 mTextView.getTextServicesLocale().toString()); 3497 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3498 mTextView.getContext().startActivity(intent); 3499 // There is no way to know if the word was indeed added. Re-check. 3500 // TODO The ExtractEditText should remove the span in the original text instead 3501 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3502 Selection.setSelection(editable, spanEnd); 3503 updateSpellCheckSpans(spanStart, spanEnd, false); 3504 hideWithCleanUp(); 3505 } 3506 }); 3507 3508 mDeleteButton = (TextView) mContentView.findViewById( 3509 com.android.internal.R.id.deleteButton); 3510 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3511 public void onClick(View v) { 3512 final Editable editable = (Editable) mTextView.getText(); 3513 3514 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3515 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3516 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3517 // Do not leave two adjacent spaces after deletion, or one at beginning of 3518 // text 3519 if (spanUnionEnd < editable.length() 3520 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3521 && (spanUnionStart == 0 3522 || Character.isSpaceChar( 3523 editable.charAt(spanUnionStart - 1)))) { 3524 spanUnionEnd = spanUnionEnd + 1; 3525 } 3526 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3527 } 3528 hideWithCleanUp(); 3529 } 3530 }); 3531 3532 } 3533 3534 public boolean isShowingUp() { 3535 return mIsShowingUp; 3536 } 3537 3538 public void onParentLostFocus() { 3539 mIsShowingUp = false; 3540 } 3541 3542 private class SuggestionAdapter extends BaseAdapter { 3543 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3544 Context.LAYOUT_INFLATER_SERVICE); 3545 3546 @Override 3547 public int getCount() { 3548 return mNumberOfSuggestions; 3549 } 3550 3551 @Override 3552 public Object getItem(int position) { 3553 return mSuggestionInfos[position]; 3554 } 3555 3556 @Override 3557 public long getItemId(int position) { 3558 return position; 3559 } 3560 3561 @Override 3562 public View getView(int position, View convertView, ViewGroup parent) { 3563 TextView textView = (TextView) convertView; 3564 3565 if (textView == null) { 3566 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3567 parent, false); 3568 } 3569 3570 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3571 textView.setText(suggestionInfo.mText); 3572 return textView; 3573 } 3574 } 3575 3576 @VisibleForTesting 3577 public ViewGroup getContentViewForTesting() { 3578 return mContentView; 3579 } 3580 3581 @Override 3582 public void show() { 3583 if (!(mTextView.getText() instanceof Editable)) return; 3584 if (extractedTextModeWillBeStarted()) { 3585 return; 3586 } 3587 3588 if (updateSuggestions()) { 3589 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3590 mTextView.setCursorVisible(false); 3591 mIsShowingUp = true; 3592 super.show(); 3593 } 3594 } 3595 3596 @Override 3597 protected void measureContent() { 3598 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3599 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3600 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3601 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3602 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3603 3604 int width = 0; 3605 View view = null; 3606 for (int i = 0; i < mNumberOfSuggestions; i++) { 3607 view = mSuggestionsAdapter.getView(i, view, mContentView); 3608 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3609 view.measure(horizontalMeasure, verticalMeasure); 3610 width = Math.max(width, view.getMeasuredWidth()); 3611 } 3612 3613 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3614 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3615 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3616 } 3617 3618 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3619 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3620 3621 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3622 + mContainerMarginWidth; 3623 3624 // Enforce the width based on actual text widths 3625 mContentView.measure( 3626 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3627 verticalMeasure); 3628 3629 Drawable popupBackground = mPopupWindow.getBackground(); 3630 if (popupBackground != null) { 3631 if (mTempRect == null) mTempRect = new Rect(); 3632 popupBackground.getPadding(mTempRect); 3633 width += mTempRect.left + mTempRect.right; 3634 } 3635 mPopupWindow.setWidth(width); 3636 } 3637 3638 @Override 3639 protected int getTextOffset() { 3640 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3641 } 3642 3643 @Override 3644 protected int getVerticalLocalPosition(int line) { 3645 return mTextView.getLayout().getLineBottom(line) - mContainerMarginTop; 3646 } 3647 3648 @Override 3649 protected int clipVertically(int positionY) { 3650 final int height = mContentView.getMeasuredHeight(); 3651 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3652 return Math.min(positionY, displayMetrics.heightPixels - height); 3653 } 3654 3655 private void hideWithCleanUp() { 3656 for (final SuggestionInfo info : mSuggestionInfos) { 3657 info.clear(); 3658 } 3659 mMisspelledSpanInfo.clear(); 3660 hide(); 3661 } 3662 3663 private boolean updateSuggestions() { 3664 Spannable spannable = (Spannable) mTextView.getText(); 3665 mNumberOfSuggestions = 3666 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3667 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3668 return false; 3669 } 3670 3671 int spanUnionStart = mTextView.getText().length(); 3672 int spanUnionEnd = 0; 3673 3674 for (int i = 0; i < mNumberOfSuggestions; i++) { 3675 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3676 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3677 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3678 } 3679 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3680 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3681 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3682 } 3683 3684 for (int i = 0; i < mNumberOfSuggestions; i++) { 3685 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3686 } 3687 3688 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3689 int addToDictionaryButtonVisibility = View.GONE; 3690 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3691 if (mMisspelledSpanInfo.mSpanStart >= 0 3692 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3693 addToDictionaryButtonVisibility = View.VISIBLE; 3694 } 3695 } 3696 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3697 3698 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3699 final int underlineColor; 3700 if (mNumberOfSuggestions != 0) { 3701 underlineColor = 3702 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3703 } else { 3704 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3705 } 3706 3707 if (underlineColor == 0) { 3708 // Fallback on the default highlight color when the first span does not provide one 3709 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3710 } else { 3711 final float BACKGROUND_TRANSPARENCY = 0.4f; 3712 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3713 mSuggestionRangeSpan.setBackgroundColor( 3714 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3715 } 3716 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3717 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3718 3719 mSuggestionsAdapter.notifyDataSetChanged(); 3720 return true; 3721 } 3722 3723 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3724 int unionEnd) { 3725 final Spannable text = (Spannable) mTextView.getText(); 3726 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3727 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3728 3729 // Adjust the start/end of the suggestion span 3730 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3731 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3732 + suggestionInfo.mText.length(); 3733 3734 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3735 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3736 3737 // Add the text before and after the span. 3738 final String textAsString = text.toString(); 3739 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3740 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3741 } 3742 3743 @Override 3744 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3745 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3746 replaceWithSuggestion(suggestionInfo); 3747 hideWithCleanUp(); 3748 } 3749 } 3750 3751 /** 3752 * An ActionMode Callback class that is used to provide actions while in text insertion or 3753 * selection mode. 3754 * 3755 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3756 * actions, depending on which of these this TextView supports and the current selection. 3757 */ 3758 private class TextActionModeCallback extends ActionMode.Callback2 { 3759 private final Path mSelectionPath = new Path(); 3760 private final RectF mSelectionBounds = new RectF(); 3761 private final boolean mHasSelection; 3762 private final int mHandleHeight; 3763 3764 public TextActionModeCallback(boolean hasSelection) { 3765 mHasSelection = hasSelection; 3766 if (mHasSelection) { 3767 SelectionModifierCursorController selectionController = getSelectionController(); 3768 if (selectionController.mStartHandle == null) { 3769 // As these are for initializing selectionController, hide() must be called. 3770 selectionController.initDrawables(); 3771 selectionController.initHandles(); 3772 selectionController.hide(); 3773 } 3774 mHandleHeight = Math.max( 3775 mSelectHandleLeft.getMinimumHeight(), 3776 mSelectHandleRight.getMinimumHeight()); 3777 } else { 3778 InsertionPointCursorController insertionController = getInsertionController(); 3779 if (insertionController != null) { 3780 insertionController.getHandle(); 3781 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3782 } else { 3783 mHandleHeight = 0; 3784 } 3785 } 3786 } 3787 3788 @Override 3789 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3790 mode.setTitle(null); 3791 mode.setSubtitle(null); 3792 mode.setTitleOptionalHint(true); 3793 populateMenuWithItems(menu); 3794 3795 Callback customCallback = getCustomCallback(); 3796 if (customCallback != null) { 3797 if (!customCallback.onCreateActionMode(mode, menu)) { 3798 // The custom mode can choose to cancel the action mode, dismiss selection. 3799 Selection.setSelection((Spannable) mTextView.getText(), 3800 mTextView.getSelectionEnd()); 3801 return false; 3802 } 3803 } 3804 3805 if (mTextView.canProcessText()) { 3806 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3807 } 3808 3809 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3810 if (mHasSelection && !mTextView.hasTransientState()) { 3811 mTextView.setHasTransientState(true); 3812 } 3813 return true; 3814 } else { 3815 return false; 3816 } 3817 } 3818 3819 private Callback getCustomCallback() { 3820 return mHasSelection 3821 ? mCustomSelectionActionModeCallback 3822 : mCustomInsertionActionModeCallback; 3823 } 3824 3825 private void populateMenuWithItems(Menu menu) { 3826 if (mTextView.canCut()) { 3827 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3828 com.android.internal.R.string.cut) 3829 .setAlphabeticShortcut('x') 3830 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3831 } 3832 3833 if (mTextView.canCopy()) { 3834 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3835 com.android.internal.R.string.copy) 3836 .setAlphabeticShortcut('c') 3837 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3838 } 3839 3840 if (mTextView.canPaste()) { 3841 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3842 com.android.internal.R.string.paste) 3843 .setAlphabeticShortcut('v') 3844 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3845 } 3846 3847 if (mTextView.canShare()) { 3848 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3849 com.android.internal.R.string.share) 3850 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3851 } 3852 3853 if (mTextView.canRequestAutofill()) { 3854 final String selected = mTextView.getSelectedText(); 3855 if (selected == null || selected.isEmpty()) { 3856 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3857 com.android.internal.R.string.autofill) 3858 .setShowAsAction(MenuItem.SHOW_AS_OVERFLOW_ALWAYS); 3859 } 3860 } 3861 3862 if (mTextView.canPasteAsPlainText()) { 3863 menu.add( 3864 Menu.NONE, 3865 TextView.ID_PASTE_AS_PLAIN_TEXT, 3866 MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 3867 com.android.internal.R.string.paste_as_plain_text) 3868 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3869 } 3870 3871 updateSelectAllItem(menu); 3872 updateReplaceItem(menu); 3873 updateAssistMenuItem(menu); 3874 } 3875 3876 @Override 3877 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3878 updateSelectAllItem(menu); 3879 updateReplaceItem(menu); 3880 updateAssistMenuItem(menu); 3881 3882 Callback customCallback = getCustomCallback(); 3883 if (customCallback != null) { 3884 return customCallback.onPrepareActionMode(mode, menu); 3885 } 3886 return true; 3887 } 3888 3889 private void updateSelectAllItem(Menu menu) { 3890 boolean canSelectAll = mTextView.canSelectAllText(); 3891 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3892 if (canSelectAll && !selectAllItemExists) { 3893 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3894 com.android.internal.R.string.selectAll) 3895 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3896 } else if (!canSelectAll && selectAllItemExists) { 3897 menu.removeItem(TextView.ID_SELECT_ALL); 3898 } 3899 } 3900 3901 private void updateReplaceItem(Menu menu) { 3902 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3903 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3904 if (canReplace && !replaceItemExists) { 3905 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3906 com.android.internal.R.string.replace) 3907 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3908 } else if (!canReplace && replaceItemExists) { 3909 menu.removeItem(TextView.ID_REPLACE); 3910 } 3911 } 3912 3913 private void updateAssistMenuItem(Menu menu) { 3914 menu.removeItem(TextView.ID_ASSIST); 3915 final TextClassification textClassification = 3916 getSelectionActionModeHelper().getTextClassification(); 3917 if (canAssist()) { 3918 menu.add(TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, 3919 textClassification.getLabel()) 3920 .setIcon(textClassification.getIcon()) 3921 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3922 mMetricsLogger.write( 3923 new LogMaker(MetricsEvent.TEXT_SELECTION_MENU_ITEM_ASSIST) 3924 .setType(MetricsEvent.TYPE_OPEN) 3925 .setSubtype(textClassification.getLogType())); 3926 } 3927 } 3928 3929 private boolean canAssist() { 3930 final TextClassification textClassification = 3931 getSelectionActionModeHelper().getTextClassification(); 3932 return mTextView.isDeviceProvisioned() 3933 && textClassification != null 3934 && (textClassification.getIcon() != null 3935 || !TextUtils.isEmpty(textClassification.getLabel())) 3936 && (textClassification.getOnClickListener() != null 3937 || (textClassification.getIntent() != null 3938 && mTextView.getContext().canStartActivityForResult())); 3939 } 3940 3941 @Override 3942 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3943 getSelectionActionModeHelper().onSelectionAction(); 3944 3945 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3946 return true; 3947 } 3948 Callback customCallback = getCustomCallback(); 3949 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3950 return true; 3951 } 3952 final TextClassification textClassification = 3953 getSelectionActionModeHelper().getTextClassification(); 3954 if (TextView.ID_ASSIST == item.getItemId() && textClassification != null) { 3955 final OnClickListener onClickListener = 3956 textClassification.getOnClickListener(); 3957 if (onClickListener != null) { 3958 onClickListener.onClick(mTextView); 3959 } else { 3960 final Intent intent = textClassification.getIntent(); 3961 if (intent != null) { 3962 TextClassification.createStartActivityOnClickListener( 3963 mTextView.getContext(), intent) 3964 .onClick(mTextView); 3965 } 3966 } 3967 mMetricsLogger.action( 3968 MetricsEvent.ACTION_TEXT_SELECTION_MENU_ITEM_ASSIST, 3969 textClassification.getLogType()); 3970 stopTextActionMode(); 3971 return true; 3972 } 3973 return mTextView.onTextContextMenuItem(item.getItemId()); 3974 } 3975 3976 @Override 3977 public void onDestroyActionMode(ActionMode mode) { 3978 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3979 getSelectionActionModeHelper().onDestroyActionMode(); 3980 mTextActionMode = null; 3981 Callback customCallback = getCustomCallback(); 3982 if (customCallback != null) { 3983 customCallback.onDestroyActionMode(mode); 3984 } 3985 3986 if (!mPreserveSelection) { 3987 /* 3988 * Leave current selection when we tentatively destroy action mode for the 3989 * selection. If we're detaching from a window, we'll bring back the selection 3990 * mode when (if) we get reattached. 3991 */ 3992 Selection.setSelection((Spannable) mTextView.getText(), 3993 mTextView.getSelectionEnd()); 3994 } 3995 3996 if (mSelectionModifierCursorController != null) { 3997 mSelectionModifierCursorController.hide(); 3998 } 3999 } 4000 4001 @Override 4002 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 4003 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 4004 super.onGetContentRect(mode, view, outRect); 4005 return; 4006 } 4007 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 4008 // We have a selection. 4009 mSelectionPath.reset(); 4010 mTextView.getLayout().getSelectionPath( 4011 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 4012 mSelectionPath.computeBounds(mSelectionBounds, true); 4013 mSelectionBounds.bottom += mHandleHeight; 4014 } else if (mCursorCount == 2) { 4015 // We have a split cursor. In this case, we take the rectangle that includes both 4016 // parts of the cursor to ensure we don't obscure either of them. 4017 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 4018 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 4019 mSelectionBounds.set( 4020 Math.min(firstCursorBounds.left, secondCursorBounds.left), 4021 Math.min(firstCursorBounds.top, secondCursorBounds.top), 4022 Math.max(firstCursorBounds.right, secondCursorBounds.right), 4023 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 4024 + mHandleHeight); 4025 } else { 4026 // We have a single cursor. 4027 Layout layout = mTextView.getLayout(); 4028 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 4029 float primaryHorizontal = clampHorizontalPosition(null, 4030 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 4031 mSelectionBounds.set( 4032 primaryHorizontal, 4033 layout.getLineTop(line), 4034 primaryHorizontal, 4035 layout.getLineTop(line + 1) + mHandleHeight); 4036 } 4037 // Take TextView's padding and scroll into account. 4038 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4039 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4040 outRect.set( 4041 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4042 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4043 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4044 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4045 } 4046 } 4047 4048 /** 4049 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4050 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4051 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4052 */ 4053 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4054 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4055 final int[] mTmpIntOffset = new int[2]; 4056 final Matrix mViewToScreenMatrix = new Matrix(); 4057 4058 @Override 4059 public void updatePosition(int parentPositionX, int parentPositionY, 4060 boolean parentPositionChanged, boolean parentScrolled) { 4061 final InputMethodState ims = mInputMethodState; 4062 if (ims == null || ims.mBatchEditNesting > 0) { 4063 return; 4064 } 4065 final InputMethodManager imm = InputMethodManager.peekInstance(); 4066 if (null == imm) { 4067 return; 4068 } 4069 if (!imm.isActive(mTextView)) { 4070 return; 4071 } 4072 // Skip if the IME has not requested the cursor/anchor position. 4073 if (!imm.isCursorAnchorInfoEnabled()) { 4074 return; 4075 } 4076 Layout layout = mTextView.getLayout(); 4077 if (layout == null) { 4078 return; 4079 } 4080 4081 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4082 builder.reset(); 4083 4084 final int selectionStart = mTextView.getSelectionStart(); 4085 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4086 4087 // Construct transformation matrix from view local coordinates to screen coordinates. 4088 mViewToScreenMatrix.set(mTextView.getMatrix()); 4089 mTextView.getLocationOnScreen(mTmpIntOffset); 4090 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4091 builder.setMatrix(mViewToScreenMatrix); 4092 4093 final float viewportToContentHorizontalOffset = 4094 mTextView.viewportToContentHorizontalOffset(); 4095 final float viewportToContentVerticalOffset = 4096 mTextView.viewportToContentVerticalOffset(); 4097 4098 final CharSequence text = mTextView.getText(); 4099 if (text instanceof Spannable) { 4100 final Spannable sp = (Spannable) text; 4101 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4102 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4103 if (composingTextEnd < composingTextStart) { 4104 final int temp = composingTextEnd; 4105 composingTextEnd = composingTextStart; 4106 composingTextStart = temp; 4107 } 4108 final boolean hasComposingText = 4109 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4110 if (hasComposingText) { 4111 final CharSequence composingText = text.subSequence(composingTextStart, 4112 composingTextEnd); 4113 builder.setComposingText(composingTextStart, composingText); 4114 mTextView.populateCharacterBounds(builder, composingTextStart, 4115 composingTextEnd, viewportToContentHorizontalOffset, 4116 viewportToContentVerticalOffset); 4117 } 4118 } 4119 4120 // Treat selectionStart as the insertion point. 4121 if (0 <= selectionStart) { 4122 final int offset = selectionStart; 4123 final int line = layout.getLineForOffset(offset); 4124 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4125 + viewportToContentHorizontalOffset; 4126 final float insertionMarkerTop = layout.getLineTop(line) 4127 + viewportToContentVerticalOffset; 4128 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4129 + viewportToContentVerticalOffset; 4130 final float insertionMarkerBottom = layout.getLineBottom(line) 4131 + viewportToContentVerticalOffset; 4132 final boolean isTopVisible = mTextView 4133 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4134 final boolean isBottomVisible = mTextView 4135 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4136 int insertionMarkerFlags = 0; 4137 if (isTopVisible || isBottomVisible) { 4138 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4139 } 4140 if (!isTopVisible || !isBottomVisible) { 4141 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4142 } 4143 if (layout.isRtlCharAt(offset)) { 4144 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4145 } 4146 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4147 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4148 } 4149 4150 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4151 } 4152 } 4153 4154 @VisibleForTesting 4155 public abstract class HandleView extends View implements TextViewPositionListener { 4156 protected Drawable mDrawable; 4157 protected Drawable mDrawableLtr; 4158 protected Drawable mDrawableRtl; 4159 private final PopupWindow mContainer; 4160 // Position with respect to the parent TextView 4161 private int mPositionX, mPositionY; 4162 private boolean mIsDragging; 4163 // Offset from touch position to mPosition 4164 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4165 protected int mHotspotX; 4166 protected int mHorizontalGravity; 4167 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4168 private float mTouchOffsetY; 4169 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4170 private float mIdealVerticalOffset; 4171 // Parent's (TextView) previous position in window 4172 private int mLastParentX, mLastParentY; 4173 // Parent's (TextView) previous position on screen 4174 private int mLastParentXOnScreen, mLastParentYOnScreen; 4175 // Previous text character offset 4176 protected int mPreviousOffset = -1; 4177 // Previous text character offset 4178 private boolean mPositionHasChanged = true; 4179 // Minimum touch target size for handles 4180 private int mMinSize; 4181 // Indicates the line of text that the handle is on. 4182 protected int mPrevLine = UNSET_LINE; 4183 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4184 // when selecting text when the handles jump to the end / start of words which may be on 4185 // a different line. 4186 protected int mPreviousLineTouched = UNSET_LINE; 4187 4188 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4189 super(mTextView.getContext()); 4190 setId(id); 4191 mContainer = new PopupWindow(mTextView.getContext(), null, 4192 com.android.internal.R.attr.textSelectHandleWindowStyle); 4193 mContainer.setSplitTouchEnabled(true); 4194 mContainer.setClippingEnabled(false); 4195 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4196 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4197 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4198 mContainer.setContentView(this); 4199 4200 mDrawableLtr = drawableLtr; 4201 mDrawableRtl = drawableRtl; 4202 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4203 com.android.internal.R.dimen.text_handle_min_size); 4204 4205 updateDrawable(); 4206 4207 final int handleHeight = getPreferredHeight(); 4208 mTouchOffsetY = -0.3f * handleHeight; 4209 mIdealVerticalOffset = 0.7f * handleHeight; 4210 } 4211 4212 public float getIdealVerticalOffset() { 4213 return mIdealVerticalOffset; 4214 } 4215 4216 protected void updateDrawable() { 4217 if (mIsDragging) { 4218 // Don't update drawable during dragging. 4219 return; 4220 } 4221 final Layout layout = mTextView.getLayout(); 4222 if (layout == null) { 4223 return; 4224 } 4225 final int offset = getCurrentCursorOffset(); 4226 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4227 final Drawable oldDrawable = mDrawable; 4228 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4229 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4230 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4231 if (oldDrawable != mDrawable && isShowing()) { 4232 // Update popup window position. 4233 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4234 - getHorizontalOffset() + getCursorOffset(); 4235 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4236 mPositionHasChanged = true; 4237 updatePosition(mLastParentX, mLastParentY, false, false); 4238 postInvalidate(); 4239 } 4240 } 4241 4242 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4243 protected abstract int getHorizontalGravity(boolean isRtlRun); 4244 4245 // Touch-up filter: number of previous positions remembered 4246 private static final int HISTORY_SIZE = 5; 4247 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4248 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4249 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4250 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4251 private int mPreviousOffsetIndex = 0; 4252 private int mNumberPreviousOffsets = 0; 4253 4254 private void startTouchUpFilter(int offset) { 4255 mNumberPreviousOffsets = 0; 4256 addPositionToTouchUpFilter(offset); 4257 } 4258 4259 private void addPositionToTouchUpFilter(int offset) { 4260 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4261 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4262 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4263 mNumberPreviousOffsets++; 4264 } 4265 4266 private void filterOnTouchUp(boolean fromTouchScreen) { 4267 final long now = SystemClock.uptimeMillis(); 4268 int i = 0; 4269 int index = mPreviousOffsetIndex; 4270 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4271 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4272 i++; 4273 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4274 } 4275 4276 if (i > 0 && i < iMax 4277 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4278 positionAtCursorOffset(mPreviousOffsets[index], false, fromTouchScreen); 4279 } 4280 } 4281 4282 public boolean offsetHasBeenChanged() { 4283 return mNumberPreviousOffsets > 1; 4284 } 4285 4286 @Override 4287 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4288 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4289 } 4290 4291 @Override 4292 public void invalidate() { 4293 super.invalidate(); 4294 if (isShowing()) { 4295 positionAtCursorOffset(getCurrentCursorOffset(), true, false); 4296 } 4297 }; 4298 4299 private int getPreferredWidth() { 4300 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4301 } 4302 4303 private int getPreferredHeight() { 4304 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4305 } 4306 4307 public void show() { 4308 if (isShowing()) return; 4309 4310 getPositionListener().addSubscriber(this, true /* local position may change */); 4311 4312 // Make sure the offset is always considered new, even when focusing at same position 4313 mPreviousOffset = -1; 4314 positionAtCursorOffset(getCurrentCursorOffset(), false, false); 4315 } 4316 4317 protected void dismiss() { 4318 mIsDragging = false; 4319 mContainer.dismiss(); 4320 onDetached(); 4321 } 4322 4323 public void hide() { 4324 dismiss(); 4325 4326 getPositionListener().removeSubscriber(this); 4327 } 4328 4329 public boolean isShowing() { 4330 return mContainer.isShowing(); 4331 } 4332 4333 private boolean isVisible() { 4334 // Always show a dragging handle. 4335 if (mIsDragging) { 4336 return true; 4337 } 4338 4339 if (mTextView.isInBatchEditMode()) { 4340 return false; 4341 } 4342 4343 return mTextView.isPositionVisible( 4344 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4345 } 4346 4347 public abstract int getCurrentCursorOffset(); 4348 4349 protected abstract void updateSelection(int offset); 4350 4351 protected abstract void updatePosition(float x, float y, boolean fromTouchScreen); 4352 4353 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4354 return layout.isRtlCharAt(offset); 4355 } 4356 4357 @VisibleForTesting 4358 public float getHorizontal(@NonNull Layout layout, int offset) { 4359 return layout.getPrimaryHorizontal(offset); 4360 } 4361 4362 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4363 return mTextView.getOffsetAtCoordinate(line, x); 4364 } 4365 4366 /** 4367 * @param offset Cursor offset. Must be in [-1, length]. 4368 * @param forceUpdatePosition whether to force update the position. This should be true 4369 * when If the parent has been scrolled, for example. 4370 * @param fromTouchScreen {@code true} if the cursor is moved with motion events from the 4371 * touch screen. 4372 */ 4373 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4374 boolean fromTouchScreen) { 4375 // A HandleView relies on the layout, which may be nulled by external methods 4376 Layout layout = mTextView.getLayout(); 4377 if (layout == null) { 4378 // Will update controllers' state, hiding them and stopping selection mode if needed 4379 prepareCursorControllers(); 4380 return; 4381 } 4382 layout = mTextView.getLayout(); 4383 4384 boolean offsetChanged = offset != mPreviousOffset; 4385 if (offsetChanged || forceUpdatePosition) { 4386 if (offsetChanged) { 4387 updateSelection(offset); 4388 if (fromTouchScreen && mHapticTextHandleEnabled) { 4389 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 4390 } 4391 addPositionToTouchUpFilter(offset); 4392 } 4393 final int line = layout.getLineForOffset(offset); 4394 mPrevLine = line; 4395 4396 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4397 - getHorizontalOffset() + getCursorOffset(); 4398 mPositionY = layout.getLineBottom(line); 4399 4400 // Take TextView's padding and scroll into account. 4401 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4402 mPositionY += mTextView.viewportToContentVerticalOffset(); 4403 4404 mPreviousOffset = offset; 4405 mPositionHasChanged = true; 4406 } 4407 } 4408 4409 /** 4410 * Return the clamped horizontal position for the first cursor. 4411 * 4412 * @param layout Text layout. 4413 * @param offset Character offset for the cursor. 4414 * @return The clamped horizontal position for the cursor. 4415 */ 4416 int getCursorHorizontalPosition(Layout layout, int offset) { 4417 return (int) (getHorizontal(layout, offset) - 0.5f); 4418 } 4419 4420 @Override 4421 public void updatePosition(int parentPositionX, int parentPositionY, 4422 boolean parentPositionChanged, boolean parentScrolled) { 4423 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled, false); 4424 if (parentPositionChanged || mPositionHasChanged) { 4425 if (mIsDragging) { 4426 // Update touchToWindow offset in case of parent scrolling while dragging 4427 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4428 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4429 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4430 mLastParentX = parentPositionX; 4431 mLastParentY = parentPositionY; 4432 } 4433 4434 onHandleMoved(); 4435 } 4436 4437 if (isVisible()) { 4438 // Transform to the window coordinates to follow the view tranformation. 4439 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4440 mTextView.transformFromViewToWindowSpace(pts); 4441 pts[0] -= mHotspotX + getHorizontalOffset(); 4442 4443 if (isShowing()) { 4444 mContainer.update(pts[0], pts[1], -1, -1); 4445 } else { 4446 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4447 } 4448 } else { 4449 if (isShowing()) { 4450 dismiss(); 4451 } 4452 } 4453 4454 mPositionHasChanged = false; 4455 } 4456 } 4457 4458 @Override 4459 protected void onDraw(Canvas c) { 4460 final int drawWidth = mDrawable.getIntrinsicWidth(); 4461 final int left = getHorizontalOffset(); 4462 4463 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4464 mDrawable.draw(c); 4465 } 4466 4467 private int getHorizontalOffset() { 4468 final int width = getPreferredWidth(); 4469 final int drawWidth = mDrawable.getIntrinsicWidth(); 4470 final int left; 4471 switch (mHorizontalGravity) { 4472 case Gravity.LEFT: 4473 left = 0; 4474 break; 4475 default: 4476 case Gravity.CENTER: 4477 left = (width - drawWidth) / 2; 4478 break; 4479 case Gravity.RIGHT: 4480 left = width - drawWidth; 4481 break; 4482 } 4483 return left; 4484 } 4485 4486 protected int getCursorOffset() { 4487 return 0; 4488 } 4489 4490 @Override 4491 public boolean onTouchEvent(MotionEvent ev) { 4492 updateFloatingToolbarVisibility(ev); 4493 4494 switch (ev.getActionMasked()) { 4495 case MotionEvent.ACTION_DOWN: { 4496 startTouchUpFilter(getCurrentCursorOffset()); 4497 4498 final PositionListener positionListener = getPositionListener(); 4499 mLastParentX = positionListener.getPositionX(); 4500 mLastParentY = positionListener.getPositionY(); 4501 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4502 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4503 4504 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4505 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4506 mTouchToWindowOffsetX = xInWindow - mPositionX; 4507 mTouchToWindowOffsetY = yInWindow - mPositionY; 4508 4509 mIsDragging = true; 4510 mPreviousLineTouched = UNSET_LINE; 4511 break; 4512 } 4513 4514 case MotionEvent.ACTION_MOVE: { 4515 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4516 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4517 4518 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4519 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4520 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4521 float newVerticalOffset; 4522 if (previousVerticalOffset < mIdealVerticalOffset) { 4523 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4524 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4525 } else { 4526 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4527 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4528 } 4529 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4530 4531 final float newPosX = 4532 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4533 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4534 4535 updatePosition(newPosX, newPosY, 4536 ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4537 break; 4538 } 4539 4540 case MotionEvent.ACTION_UP: 4541 filterOnTouchUp(ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4542 mIsDragging = false; 4543 updateDrawable(); 4544 break; 4545 4546 case MotionEvent.ACTION_CANCEL: 4547 mIsDragging = false; 4548 updateDrawable(); 4549 break; 4550 } 4551 return true; 4552 } 4553 4554 public boolean isDragging() { 4555 return mIsDragging; 4556 } 4557 4558 void onHandleMoved() {} 4559 4560 public void onDetached() {} 4561 } 4562 4563 private class InsertionHandleView extends HandleView { 4564 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4565 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4566 4567 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4568 private float mDownPositionX, mDownPositionY; 4569 private Runnable mHider; 4570 4571 public InsertionHandleView(Drawable drawable) { 4572 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4573 } 4574 4575 @Override 4576 public void show() { 4577 super.show(); 4578 4579 final long durationSinceCutOrCopy = 4580 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4581 4582 // Cancel the single tap delayed runnable. 4583 if (mInsertionActionModeRunnable != null 4584 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4585 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4586 || isCursorInsideEasyCorrectionSpan())) { 4587 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4588 } 4589 4590 // Prepare and schedule the single tap runnable to run exactly after the double tap 4591 // timeout has passed. 4592 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4593 && !isCursorInsideEasyCorrectionSpan() 4594 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4595 if (mTextActionMode == null) { 4596 if (mInsertionActionModeRunnable == null) { 4597 mInsertionActionModeRunnable = new Runnable() { 4598 @Override 4599 public void run() { 4600 startInsertionActionMode(); 4601 } 4602 }; 4603 } 4604 mTextView.postDelayed( 4605 mInsertionActionModeRunnable, 4606 ViewConfiguration.getDoubleTapTimeout() + 1); 4607 } 4608 4609 } 4610 4611 hideAfterDelay(); 4612 } 4613 4614 private void hideAfterDelay() { 4615 if (mHider == null) { 4616 mHider = new Runnable() { 4617 public void run() { 4618 hide(); 4619 } 4620 }; 4621 } else { 4622 removeHiderCallback(); 4623 } 4624 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4625 } 4626 4627 private void removeHiderCallback() { 4628 if (mHider != null) { 4629 mTextView.removeCallbacks(mHider); 4630 } 4631 } 4632 4633 @Override 4634 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4635 return drawable.getIntrinsicWidth() / 2; 4636 } 4637 4638 @Override 4639 protected int getHorizontalGravity(boolean isRtlRun) { 4640 return Gravity.CENTER_HORIZONTAL; 4641 } 4642 4643 @Override 4644 protected int getCursorOffset() { 4645 int offset = super.getCursorOffset(); 4646 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4647 if (cursor != null) { 4648 cursor.getPadding(mTempRect); 4649 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4650 } 4651 return offset; 4652 } 4653 4654 @Override 4655 int getCursorHorizontalPosition(Layout layout, int offset) { 4656 final Drawable drawable = mCursorCount > 0 ? mCursorDrawable[0] : null; 4657 if (drawable != null) { 4658 final float horizontal = getHorizontal(layout, offset); 4659 return clampHorizontalPosition(drawable, horizontal) + mTempRect.left; 4660 } 4661 return super.getCursorHorizontalPosition(layout, offset); 4662 } 4663 4664 @Override 4665 public boolean onTouchEvent(MotionEvent ev) { 4666 final boolean result = super.onTouchEvent(ev); 4667 4668 switch (ev.getActionMasked()) { 4669 case MotionEvent.ACTION_DOWN: 4670 mDownPositionX = ev.getRawX(); 4671 mDownPositionY = ev.getRawY(); 4672 break; 4673 4674 case MotionEvent.ACTION_UP: 4675 if (!offsetHasBeenChanged()) { 4676 final float deltaX = mDownPositionX - ev.getRawX(); 4677 final float deltaY = mDownPositionY - ev.getRawY(); 4678 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4679 4680 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4681 mTextView.getContext()); 4682 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4683 4684 if (distanceSquared < touchSlop * touchSlop) { 4685 // Tapping on the handle toggles the insertion action mode. 4686 if (mTextActionMode != null) { 4687 stopTextActionMode(); 4688 } else { 4689 startInsertionActionMode(); 4690 } 4691 } 4692 } else { 4693 if (mTextActionMode != null) { 4694 mTextActionMode.invalidateContentRect(); 4695 } 4696 } 4697 hideAfterDelay(); 4698 break; 4699 4700 case MotionEvent.ACTION_CANCEL: 4701 hideAfterDelay(); 4702 break; 4703 4704 default: 4705 break; 4706 } 4707 4708 return result; 4709 } 4710 4711 @Override 4712 public int getCurrentCursorOffset() { 4713 return mTextView.getSelectionStart(); 4714 } 4715 4716 @Override 4717 public void updateSelection(int offset) { 4718 Selection.setSelection((Spannable) mTextView.getText(), offset); 4719 } 4720 4721 @Override 4722 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4723 Layout layout = mTextView.getLayout(); 4724 int offset; 4725 if (layout != null) { 4726 if (mPreviousLineTouched == UNSET_LINE) { 4727 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4728 } 4729 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4730 offset = getOffsetAtCoordinate(layout, currLine, x); 4731 mPreviousLineTouched = currLine; 4732 } else { 4733 offset = -1; 4734 } 4735 positionAtCursorOffset(offset, false, fromTouchScreen); 4736 if (mTextActionMode != null) { 4737 invalidateActionMode(); 4738 } 4739 } 4740 4741 @Override 4742 void onHandleMoved() { 4743 super.onHandleMoved(); 4744 removeHiderCallback(); 4745 } 4746 4747 @Override 4748 public void onDetached() { 4749 super.onDetached(); 4750 removeHiderCallback(); 4751 } 4752 } 4753 4754 @Retention(RetentionPolicy.SOURCE) 4755 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4756 public @interface HandleType {} 4757 public static final int HANDLE_TYPE_SELECTION_START = 0; 4758 public static final int HANDLE_TYPE_SELECTION_END = 1; 4759 4760 private class SelectionHandleView extends HandleView { 4761 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4762 // end (HANDLE_TYPE_SELECTION_END). 4763 @HandleType 4764 private final int mHandleType; 4765 // Indicates whether the cursor is making adjustments within a word. 4766 private boolean mInWord = false; 4767 // Difference between touch position and word boundary position. 4768 private float mTouchWordDelta; 4769 // X value of the previous updatePosition call. 4770 private float mPrevX; 4771 // Indicates if the handle has moved a boundary between LTR and RTL text. 4772 private boolean mLanguageDirectionChanged = false; 4773 // Distance from edge of horizontally scrolling text view 4774 // to use to switch to character mode. 4775 private final float mTextViewEdgeSlop; 4776 // Used to save text view location. 4777 private final int[] mTextViewLocation = new int[2]; 4778 4779 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4780 @HandleType int handleType) { 4781 super(drawableLtr, drawableRtl, id); 4782 mHandleType = handleType; 4783 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4784 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4785 } 4786 4787 private boolean isStartHandle() { 4788 return mHandleType == HANDLE_TYPE_SELECTION_START; 4789 } 4790 4791 @Override 4792 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4793 if (isRtlRun == isStartHandle()) { 4794 return drawable.getIntrinsicWidth() / 4; 4795 } else { 4796 return (drawable.getIntrinsicWidth() * 3) / 4; 4797 } 4798 } 4799 4800 @Override 4801 protected int getHorizontalGravity(boolean isRtlRun) { 4802 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4803 } 4804 4805 @Override 4806 public int getCurrentCursorOffset() { 4807 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4808 } 4809 4810 @Override 4811 protected void updateSelection(int offset) { 4812 if (isStartHandle()) { 4813 Selection.setSelection((Spannable) mTextView.getText(), offset, 4814 mTextView.getSelectionEnd()); 4815 } else { 4816 Selection.setSelection((Spannable) mTextView.getText(), 4817 mTextView.getSelectionStart(), offset); 4818 } 4819 updateDrawable(); 4820 if (mTextActionMode != null) { 4821 invalidateActionMode(); 4822 } 4823 } 4824 4825 @Override 4826 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4827 final Layout layout = mTextView.getLayout(); 4828 if (layout == null) { 4829 // HandleView will deal appropriately in positionAtCursorOffset when 4830 // layout is null. 4831 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y), 4832 fromTouchScreen); 4833 return; 4834 } 4835 4836 if (mPreviousLineTouched == UNSET_LINE) { 4837 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4838 } 4839 4840 boolean positionCursor = false; 4841 final int anotherHandleOffset = 4842 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4843 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4844 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4845 4846 if (isStartHandle() && initialOffset >= anotherHandleOffset 4847 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4848 // Handles have crossed, bound it to the first selected line and 4849 // adjust by word / char as normal. 4850 currLine = layout.getLineForOffset(anotherHandleOffset); 4851 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4852 } 4853 4854 int offset = initialOffset; 4855 final int wordEnd = getWordEnd(offset); 4856 final int wordStart = getWordStart(offset); 4857 4858 if (mPrevX == UNSET_X_VALUE) { 4859 mPrevX = x; 4860 } 4861 4862 final int currentOffset = getCurrentCursorOffset(); 4863 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4864 final boolean atRtl = isAtRtlRun(layout, offset); 4865 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4866 4867 // We can't determine if the user is expanding or shrinking the selection if they're 4868 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4869 // the cursor at the current position. 4870 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4871 // We're on a boundary or this is the first direction change -- just update 4872 // to the current position. 4873 mLanguageDirectionChanged = true; 4874 mTouchWordDelta = 0.0f; 4875 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4876 return; 4877 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4878 // We've just moved past the boundary so update the position. After this we can 4879 // figure out if the user is expanding or shrinking to go by word or character. 4880 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4881 mTouchWordDelta = 0.0f; 4882 mLanguageDirectionChanged = false; 4883 return; 4884 } 4885 4886 boolean isExpanding; 4887 final float xDiff = x - mPrevX; 4888 if (isStartHandle()) { 4889 isExpanding = currLine < mPreviousLineTouched; 4890 } else { 4891 isExpanding = currLine > mPreviousLineTouched; 4892 } 4893 if (atRtl == isStartHandle()) { 4894 isExpanding |= xDiff > 0; 4895 } else { 4896 isExpanding |= xDiff < 0; 4897 } 4898 4899 if (mTextView.getHorizontallyScrolling()) { 4900 if (positionNearEdgeOfScrollingView(x, atRtl) 4901 && ((isStartHandle() && mTextView.getScrollX() != 0) 4902 || (!isStartHandle() 4903 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4904 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4905 || (!isStartHandle() && offset > currentOffset))) 4906 || !isExpanding)) { 4907 // If we're expanding ensure that the offset is actually expanding compared to 4908 // the current offset, if the handle snapped to the word, the finger position 4909 // may be out of sync and we don't want the selection to jump back. 4910 mTouchWordDelta = 0.0f; 4911 final int nextOffset = (atRtl == isStartHandle()) 4912 ? layout.getOffsetToRightOf(mPreviousOffset) 4913 : layout.getOffsetToLeftOf(mPreviousOffset); 4914 positionAndAdjustForCrossingHandles(nextOffset, fromTouchScreen); 4915 return; 4916 } 4917 } 4918 4919 if (isExpanding) { 4920 // User is increasing the selection. 4921 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4922 final boolean snapToWord = (!mInWord 4923 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4924 && atRtl == isAtRtlRun(layout, wordBoundary); 4925 if (snapToWord) { 4926 // Sometimes words can be broken across lines (Chinese, hyphenation). 4927 // We still snap to the word boundary but we only use the letters on the 4928 // current line to determine if the user is far enough into the word to snap. 4929 if (layout.getLineForOffset(wordBoundary) != currLine) { 4930 wordBoundary = isStartHandle() 4931 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4932 } 4933 final int offsetThresholdToSnap = isStartHandle() 4934 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4935 : wordStart + ((wordBoundary - wordStart) / 2); 4936 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 = wordStart; 4941 } else if (!isStartHandle() 4942 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4943 // User is far enough into the word or on a different line so we expand by 4944 // word. 4945 offset = wordEnd; 4946 } else { 4947 offset = mPreviousOffset; 4948 } 4949 } 4950 if ((isStartHandle() && offset < initialOffset) 4951 || (!isStartHandle() && offset > initialOffset)) { 4952 final float adjustedX = getHorizontal(layout, offset); 4953 mTouchWordDelta = 4954 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4955 } else { 4956 mTouchWordDelta = 0.0f; 4957 } 4958 positionCursor = true; 4959 } else { 4960 final int adjustedOffset = 4961 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4962 final boolean shrinking = isStartHandle() 4963 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4964 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4965 if (shrinking) { 4966 // User is shrinking the selection. 4967 if (currLine != mPrevLine) { 4968 // We're on a different line, so we'll snap to word boundaries. 4969 offset = isStartHandle() ? wordStart : wordEnd; 4970 if ((isStartHandle() && offset < initialOffset) 4971 || (!isStartHandle() && offset > initialOffset)) { 4972 final float adjustedX = getHorizontal(layout, offset); 4973 mTouchWordDelta = 4974 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4975 } else { 4976 mTouchWordDelta = 0.0f; 4977 } 4978 } else { 4979 offset = adjustedOffset; 4980 } 4981 positionCursor = true; 4982 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4983 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4984 // Handle has jumped to the word boundary, and the user is moving 4985 // their finger towards the handle, the delta should be updated. 4986 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4987 - getHorizontal(layout, mPreviousOffset); 4988 } 4989 } 4990 4991 if (positionCursor) { 4992 mPreviousLineTouched = currLine; 4993 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4994 } 4995 mPrevX = x; 4996 } 4997 4998 @Override 4999 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 5000 boolean fromTouchScreen) { 5001 super.positionAtCursorOffset(offset, forceUpdatePosition, fromTouchScreen); 5002 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 5003 } 5004 5005 @Override 5006 public boolean onTouchEvent(MotionEvent event) { 5007 boolean superResult = super.onTouchEvent(event); 5008 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 5009 // Reset the touch word offset and x value when the user 5010 // re-engages the handle. 5011 mTouchWordDelta = 0.0f; 5012 mPrevX = UNSET_X_VALUE; 5013 } 5014 return superResult; 5015 } 5016 5017 private void positionAndAdjustForCrossingHandles(int offset, boolean fromTouchScreen) { 5018 final int anotherHandleOffset = 5019 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5020 if ((isStartHandle() && offset >= anotherHandleOffset) 5021 || (!isStartHandle() && offset <= anotherHandleOffset)) { 5022 mTouchWordDelta = 0.0f; 5023 final Layout layout = mTextView.getLayout(); 5024 if (layout != null && offset != anotherHandleOffset) { 5025 final float horiz = getHorizontal(layout, offset); 5026 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 5027 !isStartHandle()); 5028 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 5029 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 5030 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 5031 // This handle passes another one as it crossed a direction boundary. 5032 // Don't minimize the selection, but keep the handle at the run boundary. 5033 final int currentOffset = getCurrentCursorOffset(); 5034 final int offsetToGetRunRange = isStartHandle() 5035 ? currentOffset : Math.max(currentOffset - 1, 0); 5036 final long range = layout.getRunRange(offsetToGetRunRange); 5037 if (isStartHandle()) { 5038 offset = TextUtils.unpackRangeStartFromLong(range); 5039 } else { 5040 offset = TextUtils.unpackRangeEndFromLong(range); 5041 } 5042 positionAtCursorOffset(offset, false, fromTouchScreen); 5043 return; 5044 } 5045 } 5046 // Handles can not cross and selection is at least one character. 5047 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5048 } 5049 positionAtCursorOffset(offset, false, fromTouchScreen); 5050 } 5051 5052 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5053 mTextView.getLocationOnScreen(mTextViewLocation); 5054 boolean nearEdge; 5055 if (atRtl == isStartHandle()) { 5056 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5057 - mTextView.getPaddingRight(); 5058 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5059 } else { 5060 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5061 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5062 } 5063 return nearEdge; 5064 } 5065 5066 @Override 5067 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5068 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5069 return layout.isRtlCharAt(offsetToCheck); 5070 } 5071 5072 @Override 5073 public float getHorizontal(@NonNull Layout layout, int offset) { 5074 return getHorizontal(layout, offset, isStartHandle()); 5075 } 5076 5077 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5078 final int line = layout.getLineForOffset(offset); 5079 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5080 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5081 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5082 return (isRtlChar == isRtlParagraph) 5083 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5084 } 5085 5086 @Override 5087 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5088 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5089 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5090 if (!layout.isLevelBoundary(primaryOffset)) { 5091 return primaryOffset; 5092 } 5093 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5094 final int currentOffset = getCurrentCursorOffset(); 5095 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5096 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5097 if (primaryDiff < secondaryDiff) { 5098 return primaryOffset; 5099 } else if (primaryDiff > secondaryDiff) { 5100 return secondaryOffset; 5101 } else { 5102 final int offsetToCheck = isStartHandle() 5103 ? currentOffset : Math.max(currentOffset - 1, 0); 5104 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5105 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5106 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5107 } 5108 } 5109 } 5110 5111 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5112 final int trueLine = mTextView.getLineAtCoordinate(y); 5113 if (layout == null || prevLine > layout.getLineCount() 5114 || layout.getLineCount() <= 0 || prevLine < 0) { 5115 // Invalid parameters, just return whatever line is at y. 5116 return trueLine; 5117 } 5118 5119 if (Math.abs(trueLine - prevLine) >= 2) { 5120 // Only stick to lines if we're within a line of the previous selection. 5121 return trueLine; 5122 } 5123 5124 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5125 final int lineCount = layout.getLineCount(); 5126 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5127 5128 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5129 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5130 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5131 5132 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5133 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5134 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5135 5136 // Determine if we've moved lines based on y position and previous line. 5137 int currLine; 5138 if (y <= yTopBound) { 5139 currLine = Math.max(prevLine - 1, 0); 5140 } else if (y >= yBottomBound) { 5141 currLine = Math.min(prevLine + 1, lineCount - 1); 5142 } else { 5143 currLine = prevLine; 5144 } 5145 return currLine; 5146 } 5147 5148 /** 5149 * A CursorController instance can be used to control a cursor in the text. 5150 */ 5151 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5152 /** 5153 * Makes the cursor controller visible on screen. 5154 * See also {@link #hide()}. 5155 */ 5156 public void show(); 5157 5158 /** 5159 * Hide the cursor controller from screen. 5160 * See also {@link #show()}. 5161 */ 5162 public void hide(); 5163 5164 /** 5165 * Called when the view is detached from window. Perform house keeping task, such as 5166 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5167 * preventing the activity from being recycled. 5168 */ 5169 public void onDetached(); 5170 5171 public boolean isCursorBeingModified(); 5172 5173 public boolean isActive(); 5174 } 5175 5176 private class InsertionPointCursorController implements CursorController { 5177 private InsertionHandleView mHandle; 5178 5179 public void show() { 5180 getHandle().show(); 5181 5182 if (mSelectionModifierCursorController != null) { 5183 mSelectionModifierCursorController.hide(); 5184 } 5185 } 5186 5187 public void hide() { 5188 if (mHandle != null) { 5189 mHandle.hide(); 5190 } 5191 } 5192 5193 public void onTouchModeChanged(boolean isInTouchMode) { 5194 if (!isInTouchMode) { 5195 hide(); 5196 } 5197 } 5198 5199 private InsertionHandleView getHandle() { 5200 if (mSelectHandleCenter == null) { 5201 mSelectHandleCenter = mTextView.getContext().getDrawable( 5202 mTextView.mTextSelectHandleRes); 5203 } 5204 if (mHandle == null) { 5205 mHandle = new InsertionHandleView(mSelectHandleCenter); 5206 } 5207 return mHandle; 5208 } 5209 5210 @Override 5211 public void onDetached() { 5212 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5213 observer.removeOnTouchModeChangeListener(this); 5214 5215 if (mHandle != null) mHandle.onDetached(); 5216 } 5217 5218 @Override 5219 public boolean isCursorBeingModified() { 5220 return mHandle != null && mHandle.isDragging(); 5221 } 5222 5223 @Override 5224 public boolean isActive() { 5225 return mHandle != null && mHandle.isShowing(); 5226 } 5227 5228 public void invalidateHandle() { 5229 if (mHandle != null) { 5230 mHandle.invalidate(); 5231 } 5232 } 5233 } 5234 5235 class SelectionModifierCursorController implements CursorController { 5236 // The cursor controller handles, lazily created when shown. 5237 private SelectionHandleView mStartHandle; 5238 private SelectionHandleView mEndHandle; 5239 // The offsets of that last touch down event. Remembered to start selection there. 5240 private int mMinTouchOffset, mMaxTouchOffset; 5241 5242 private float mDownPositionX, mDownPositionY; 5243 private boolean mGestureStayedInTapRegion; 5244 5245 // Where the user first starts the drag motion. 5246 private int mStartOffset = -1; 5247 5248 private boolean mHaventMovedEnoughToStartDrag; 5249 // The line that a selection happened most recently with the drag accelerator. 5250 private int mLineSelectionIsOn = -1; 5251 // Whether the drag accelerator has selected past the initial line. 5252 private boolean mSwitchedLines = false; 5253 5254 // Indicates the drag accelerator mode that the user is currently using. 5255 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5256 // Drag accelerator is inactive. 5257 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5258 // Character based selection by dragging. Only for mouse. 5259 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5260 // Word based selection by dragging. Enabled after long pressing or double tapping. 5261 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5262 // Paragraph based selection by dragging. Enabled after mouse triple click. 5263 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5264 5265 SelectionModifierCursorController() { 5266 resetTouchOffsets(); 5267 } 5268 5269 public void show() { 5270 if (mTextView.isInBatchEditMode()) { 5271 return; 5272 } 5273 initDrawables(); 5274 initHandles(); 5275 } 5276 5277 private void initDrawables() { 5278 if (mSelectHandleLeft == null) { 5279 mSelectHandleLeft = mTextView.getContext().getDrawable( 5280 mTextView.mTextSelectHandleLeftRes); 5281 } 5282 if (mSelectHandleRight == null) { 5283 mSelectHandleRight = mTextView.getContext().getDrawable( 5284 mTextView.mTextSelectHandleRightRes); 5285 } 5286 } 5287 5288 private void initHandles() { 5289 // Lazy object creation has to be done before updatePosition() is called. 5290 if (mStartHandle == null) { 5291 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5292 com.android.internal.R.id.selection_start_handle, 5293 HANDLE_TYPE_SELECTION_START); 5294 } 5295 if (mEndHandle == null) { 5296 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5297 com.android.internal.R.id.selection_end_handle, 5298 HANDLE_TYPE_SELECTION_END); 5299 } 5300 5301 mStartHandle.show(); 5302 mEndHandle.show(); 5303 5304 hideInsertionPointCursorController(); 5305 } 5306 5307 public void hide() { 5308 if (mStartHandle != null) mStartHandle.hide(); 5309 if (mEndHandle != null) mEndHandle.hide(); 5310 } 5311 5312 public void enterDrag(int dragAcceleratorMode) { 5313 // Just need to init the handles / hide insertion cursor. 5314 show(); 5315 mDragAcceleratorMode = dragAcceleratorMode; 5316 // Start location of selection. 5317 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5318 mLastDownPositionY); 5319 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5320 // Don't show the handles until user has lifted finger. 5321 hide(); 5322 5323 // This stops scrolling parents from intercepting the touch event, allowing 5324 // the user to continue dragging across the screen to select text; TextView will 5325 // scroll as necessary. 5326 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5327 mTextView.cancelLongPress(); 5328 } 5329 5330 public void onTouchEvent(MotionEvent event) { 5331 // This is done even when the View does not have focus, so that long presses can start 5332 // selection and tap can move cursor from this tap position. 5333 final float eventX = event.getX(); 5334 final float eventY = event.getY(); 5335 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5336 switch (event.getActionMasked()) { 5337 case MotionEvent.ACTION_DOWN: 5338 if (extractedTextModeWillBeStarted()) { 5339 // Prevent duplicating the selection handles until the mode starts. 5340 hide(); 5341 } else { 5342 // Remember finger down position, to be able to start selection from there. 5343 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5344 eventX, eventY); 5345 5346 // Double tap detection 5347 if (mGestureStayedInTapRegion) { 5348 if (mTapState == TAP_STATE_DOUBLE_TAP 5349 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5350 final float deltaX = eventX - mDownPositionX; 5351 final float deltaY = eventY - mDownPositionY; 5352 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5353 5354 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5355 mTextView.getContext()); 5356 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5357 boolean stayedInArea = 5358 distanceSquared < doubleTapSlop * doubleTapSlop; 5359 5360 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5361 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5362 selectCurrentWordAndStartDrag(); 5363 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5364 selectCurrentParagraphAndStartDrag(); 5365 } 5366 mDiscardNextActionUp = true; 5367 } 5368 } 5369 } 5370 5371 mDownPositionX = eventX; 5372 mDownPositionY = eventY; 5373 mGestureStayedInTapRegion = true; 5374 mHaventMovedEnoughToStartDrag = true; 5375 } 5376 break; 5377 5378 case MotionEvent.ACTION_POINTER_DOWN: 5379 case MotionEvent.ACTION_POINTER_UP: 5380 // Handle multi-point gestures. Keep min and max offset positions. 5381 // Only activated for devices that correctly handle multi-touch. 5382 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5383 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5384 updateMinAndMaxOffsets(event); 5385 } 5386 break; 5387 5388 case MotionEvent.ACTION_MOVE: 5389 final ViewConfiguration viewConfig = ViewConfiguration.get( 5390 mTextView.getContext()); 5391 final int touchSlop = viewConfig.getScaledTouchSlop(); 5392 5393 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5394 final float deltaX = eventX - mDownPositionX; 5395 final float deltaY = eventY - mDownPositionY; 5396 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5397 5398 if (mGestureStayedInTapRegion) { 5399 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5400 mGestureStayedInTapRegion = 5401 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5402 } 5403 if (mHaventMovedEnoughToStartDrag) { 5404 // We don't start dragging until the user has moved enough. 5405 mHaventMovedEnoughToStartDrag = 5406 distanceSquared <= touchSlop * touchSlop; 5407 } 5408 } 5409 5410 if (isMouse && !isDragAcceleratorActive()) { 5411 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5412 if (mTextView.hasSelection() 5413 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5414 && offset >= mTextView.getSelectionStart() 5415 && offset <= mTextView.getSelectionEnd()) { 5416 startDragAndDrop(); 5417 break; 5418 } 5419 5420 if (mStartOffset != offset) { 5421 // Start character based drag accelerator. 5422 stopTextActionMode(); 5423 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5424 mDiscardNextActionUp = true; 5425 mHaventMovedEnoughToStartDrag = false; 5426 } 5427 } 5428 5429 if (mStartHandle != null && mStartHandle.isShowing()) { 5430 // Don't do the drag if the handles are showing already. 5431 break; 5432 } 5433 5434 updateSelection(event); 5435 break; 5436 5437 case MotionEvent.ACTION_UP: 5438 if (!isDragAcceleratorActive()) { 5439 break; 5440 } 5441 updateSelection(event); 5442 5443 // No longer dragging to select text, let the parent intercept events. 5444 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5445 5446 // No longer the first dragging motion, reset. 5447 resetDragAcceleratorState(); 5448 5449 if (mTextView.hasSelection()) { 5450 // Drag selection should not be adjusted by the text classifier. 5451 startSelectionActionModeAsync(mHaventMovedEnoughToStartDrag); 5452 } 5453 break; 5454 } 5455 } 5456 5457 private void updateSelection(MotionEvent event) { 5458 if (mTextView.getLayout() != null) { 5459 switch (mDragAcceleratorMode) { 5460 case DRAG_ACCELERATOR_MODE_CHARACTER: 5461 updateCharacterBasedSelection(event); 5462 break; 5463 case DRAG_ACCELERATOR_MODE_WORD: 5464 updateWordBasedSelection(event); 5465 break; 5466 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5467 updateParagraphBasedSelection(event); 5468 break; 5469 } 5470 } 5471 } 5472 5473 /** 5474 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5475 * 5476 * @return true if the drag was started. 5477 */ 5478 private boolean selectCurrentParagraphAndStartDrag() { 5479 if (mInsertionActionModeRunnable != null) { 5480 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5481 } 5482 stopTextActionMode(); 5483 if (!selectCurrentParagraph()) { 5484 return false; 5485 } 5486 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5487 return true; 5488 } 5489 5490 private void updateCharacterBasedSelection(MotionEvent event) { 5491 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5492 updateSelectionInternal(mStartOffset, offset, 5493 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5494 } 5495 5496 private void updateWordBasedSelection(MotionEvent event) { 5497 if (mHaventMovedEnoughToStartDrag) { 5498 return; 5499 } 5500 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5501 final ViewConfiguration viewConfig = ViewConfiguration.get( 5502 mTextView.getContext()); 5503 final float eventX = event.getX(); 5504 final float eventY = event.getY(); 5505 final int currLine; 5506 if (isMouse) { 5507 // No need to offset the y coordinate for mouse input. 5508 currLine = mTextView.getLineAtCoordinate(eventY); 5509 } else { 5510 float y = eventY; 5511 if (mSwitchedLines) { 5512 // Offset the finger by the same vertical offset as the handles. 5513 // This improves visibility of the content being selected by 5514 // shifting the finger below the content, this is applied once 5515 // the user has switched lines. 5516 final int touchSlop = viewConfig.getScaledTouchSlop(); 5517 final float fingerOffset = (mStartHandle != null) 5518 ? mStartHandle.getIdealVerticalOffset() 5519 : touchSlop; 5520 y = eventY - fingerOffset; 5521 } 5522 5523 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5524 y); 5525 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5526 // Break early here, we want to offset the finger position from 5527 // the selection highlight, once the user moved their finger 5528 // to a different line we should apply the offset and *not* switch 5529 // lines until recomputing the position with the finger offset. 5530 mSwitchedLines = true; 5531 return; 5532 } 5533 } 5534 5535 int startOffset; 5536 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5537 // Snap to word boundaries. 5538 if (mStartOffset < offset) { 5539 // Expanding with end handle. 5540 offset = getWordEnd(offset); 5541 startOffset = getWordStart(mStartOffset); 5542 } else { 5543 // Expanding with start handle. 5544 offset = getWordStart(offset); 5545 startOffset = getWordEnd(mStartOffset); 5546 if (startOffset == offset) { 5547 offset = getNextCursorOffset(offset, false); 5548 } 5549 } 5550 mLineSelectionIsOn = currLine; 5551 updateSelectionInternal(startOffset, offset, 5552 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5553 } 5554 5555 private void updateParagraphBasedSelection(MotionEvent event) { 5556 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5557 5558 final int start = Math.min(offset, mStartOffset); 5559 final int end = Math.max(offset, mStartOffset); 5560 final long paragraphsRange = getParagraphsRange(start, end); 5561 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5562 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5563 updateSelectionInternal(selectionStart, selectionEnd, 5564 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5565 } 5566 5567 private void updateSelectionInternal(int selectionStart, int selectionEnd, 5568 boolean fromTouchScreen) { 5569 final boolean performHapticFeedback = fromTouchScreen && mHapticTextHandleEnabled 5570 && ((mTextView.getSelectionStart() != selectionStart) 5571 || (mTextView.getSelectionEnd() != selectionEnd)); 5572 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5573 if (performHapticFeedback) { 5574 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 5575 } 5576 } 5577 5578 /** 5579 * @param event 5580 */ 5581 private void updateMinAndMaxOffsets(MotionEvent event) { 5582 int pointerCount = event.getPointerCount(); 5583 for (int index = 0; index < pointerCount; index++) { 5584 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5585 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5586 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5587 } 5588 } 5589 5590 public int getMinTouchOffset() { 5591 return mMinTouchOffset; 5592 } 5593 5594 public int getMaxTouchOffset() { 5595 return mMaxTouchOffset; 5596 } 5597 5598 public void resetTouchOffsets() { 5599 mMinTouchOffset = mMaxTouchOffset = -1; 5600 resetDragAcceleratorState(); 5601 } 5602 5603 private void resetDragAcceleratorState() { 5604 mStartOffset = -1; 5605 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5606 mSwitchedLines = false; 5607 final int selectionStart = mTextView.getSelectionStart(); 5608 final int selectionEnd = mTextView.getSelectionEnd(); 5609 if (selectionStart > selectionEnd) { 5610 Selection.setSelection((Spannable) mTextView.getText(), 5611 selectionEnd, selectionStart); 5612 } 5613 } 5614 5615 /** 5616 * @return true iff this controller is currently used to move the selection start. 5617 */ 5618 public boolean isSelectionStartDragged() { 5619 return mStartHandle != null && mStartHandle.isDragging(); 5620 } 5621 5622 @Override 5623 public boolean isCursorBeingModified() { 5624 return isDragAcceleratorActive() || isSelectionStartDragged() 5625 || (mEndHandle != null && mEndHandle.isDragging()); 5626 } 5627 5628 /** 5629 * @return true if the user is selecting text using the drag accelerator. 5630 */ 5631 public boolean isDragAcceleratorActive() { 5632 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5633 } 5634 5635 public void onTouchModeChanged(boolean isInTouchMode) { 5636 if (!isInTouchMode) { 5637 hide(); 5638 } 5639 } 5640 5641 @Override 5642 public void onDetached() { 5643 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5644 observer.removeOnTouchModeChangeListener(this); 5645 5646 if (mStartHandle != null) mStartHandle.onDetached(); 5647 if (mEndHandle != null) mEndHandle.onDetached(); 5648 } 5649 5650 @Override 5651 public boolean isActive() { 5652 return mStartHandle != null && mStartHandle.isShowing(); 5653 } 5654 5655 public void invalidateHandles() { 5656 if (mStartHandle != null) { 5657 mStartHandle.invalidate(); 5658 } 5659 if (mEndHandle != null) { 5660 mEndHandle.invalidate(); 5661 } 5662 } 5663 } 5664 5665 private class CorrectionHighlighter { 5666 private final Path mPath = new Path(); 5667 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5668 private int mStart, mEnd; 5669 private long mFadingStartTime; 5670 private RectF mTempRectF; 5671 private static final int FADE_OUT_DURATION = 400; 5672 5673 public CorrectionHighlighter() { 5674 mPaint.setCompatibilityScaling( 5675 mTextView.getResources().getCompatibilityInfo().applicationScale); 5676 mPaint.setStyle(Paint.Style.FILL); 5677 } 5678 5679 public void highlight(CorrectionInfo info) { 5680 mStart = info.getOffset(); 5681 mEnd = mStart + info.getNewText().length(); 5682 mFadingStartTime = SystemClock.uptimeMillis(); 5683 5684 if (mStart < 0 || mEnd < 0) { 5685 stopAnimation(); 5686 } 5687 } 5688 5689 public void draw(Canvas canvas, int cursorOffsetVertical) { 5690 if (updatePath() && updatePaint()) { 5691 if (cursorOffsetVertical != 0) { 5692 canvas.translate(0, cursorOffsetVertical); 5693 } 5694 5695 canvas.drawPath(mPath, mPaint); 5696 5697 if (cursorOffsetVertical != 0) { 5698 canvas.translate(0, -cursorOffsetVertical); 5699 } 5700 invalidate(true); // TODO invalidate cursor region only 5701 } else { 5702 stopAnimation(); 5703 invalidate(false); // TODO invalidate cursor region only 5704 } 5705 } 5706 5707 private boolean updatePaint() { 5708 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5709 if (duration > FADE_OUT_DURATION) return false; 5710 5711 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5712 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5713 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5714 + ((int) (highlightColorAlpha * coef) << 24); 5715 mPaint.setColor(color); 5716 return true; 5717 } 5718 5719 private boolean updatePath() { 5720 final Layout layout = mTextView.getLayout(); 5721 if (layout == null) return false; 5722 5723 // Update in case text is edited while the animation is run 5724 final int length = mTextView.getText().length(); 5725 int start = Math.min(length, mStart); 5726 int end = Math.min(length, mEnd); 5727 5728 mPath.reset(); 5729 layout.getSelectionPath(start, end, mPath); 5730 return true; 5731 } 5732 5733 private void invalidate(boolean delayed) { 5734 if (mTextView.getLayout() == null) return; 5735 5736 if (mTempRectF == null) mTempRectF = new RectF(); 5737 mPath.computeBounds(mTempRectF, false); 5738 5739 int left = mTextView.getCompoundPaddingLeft(); 5740 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5741 5742 if (delayed) { 5743 mTextView.postInvalidateOnAnimation( 5744 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5745 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5746 } else { 5747 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5748 (int) mTempRectF.right, (int) mTempRectF.bottom); 5749 } 5750 } 5751 5752 private void stopAnimation() { 5753 Editor.this.mCorrectionHighlighter = null; 5754 } 5755 } 5756 5757 private static class ErrorPopup extends PopupWindow { 5758 private boolean mAbove = false; 5759 private final TextView mView; 5760 private int mPopupInlineErrorBackgroundId = 0; 5761 private int mPopupInlineErrorAboveBackgroundId = 0; 5762 5763 ErrorPopup(TextView v, int width, int height) { 5764 super(v, width, height); 5765 mView = v; 5766 // Make sure the TextView has a background set as it will be used the first time it is 5767 // shown and positioned. Initialized with below background, which should have 5768 // dimensions identical to the above version for this to work (and is more likely). 5769 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5770 com.android.internal.R.styleable.Theme_errorMessageBackground); 5771 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5772 } 5773 5774 void fixDirection(boolean above) { 5775 mAbove = above; 5776 5777 if (above) { 5778 mPopupInlineErrorAboveBackgroundId = 5779 getResourceId(mPopupInlineErrorAboveBackgroundId, 5780 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5781 } else { 5782 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5783 com.android.internal.R.styleable.Theme_errorMessageBackground); 5784 } 5785 5786 mView.setBackgroundResource( 5787 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5788 } 5789 5790 private int getResourceId(int currentId, int index) { 5791 if (currentId == 0) { 5792 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5793 R.styleable.Theme); 5794 currentId = styledAttributes.getResourceId(index, 0); 5795 styledAttributes.recycle(); 5796 } 5797 return currentId; 5798 } 5799 5800 @Override 5801 public void update(int x, int y, int w, int h, boolean force) { 5802 super.update(x, y, w, h, force); 5803 5804 boolean above = isAboveAnchor(); 5805 if (above != mAbove) { 5806 fixDirection(above); 5807 } 5808 } 5809 } 5810 5811 static class InputContentType { 5812 int imeOptions = EditorInfo.IME_NULL; 5813 String privateImeOptions; 5814 CharSequence imeActionLabel; 5815 int imeActionId; 5816 Bundle extras; 5817 OnEditorActionListener onEditorActionListener; 5818 boolean enterDown; 5819 LocaleList imeHintLocales; 5820 } 5821 5822 static class InputMethodState { 5823 ExtractedTextRequest mExtractedTextRequest; 5824 final ExtractedText mExtractedText = new ExtractedText(); 5825 int mBatchEditNesting; 5826 boolean mCursorChanged; 5827 boolean mSelectionModeChanged; 5828 boolean mContentChanged; 5829 int mChangedStart, mChangedEnd, mChangedDelta; 5830 } 5831 5832 /** 5833 * @return True iff (start, end) is a valid range within the text. 5834 */ 5835 private static boolean isValidRange(CharSequence text, int start, int end) { 5836 return 0 <= start && start <= end && end <= text.length(); 5837 } 5838 5839 @VisibleForTesting 5840 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5841 return mSuggestionsPopupWindow; 5842 } 5843 5844 /** 5845 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5846 * text being typed (and hence always returns null from the filter() method). 5847 * 5848 * TODO: Make this span aware. 5849 */ 5850 public static class UndoInputFilter implements InputFilter { 5851 private final Editor mEditor; 5852 5853 // Whether the current filter pass is directly caused by an end-user text edit. 5854 private boolean mIsUserEdit; 5855 5856 // Whether the text field is handling an IME composition. Must be parceled in case the user 5857 // rotates the screen during composition. 5858 private boolean mHasComposition; 5859 5860 // Whether the user is expanding or shortening the text 5861 private boolean mExpanding; 5862 5863 // Whether the previous edit operation was in the current batch edit. 5864 private boolean mPreviousOperationWasInSameBatchEdit; 5865 5866 public UndoInputFilter(Editor editor) { 5867 mEditor = editor; 5868 } 5869 5870 public void saveInstanceState(Parcel parcel) { 5871 parcel.writeInt(mIsUserEdit ? 1 : 0); 5872 parcel.writeInt(mHasComposition ? 1 : 0); 5873 parcel.writeInt(mExpanding ? 1 : 0); 5874 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5875 } 5876 5877 public void restoreInstanceState(Parcel parcel) { 5878 mIsUserEdit = parcel.readInt() != 0; 5879 mHasComposition = parcel.readInt() != 0; 5880 mExpanding = parcel.readInt() != 0; 5881 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5882 } 5883 5884 /** 5885 * Signals that a user-triggered edit is starting. 5886 */ 5887 public void beginBatchEdit() { 5888 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5889 mIsUserEdit = true; 5890 } 5891 5892 public void endBatchEdit() { 5893 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5894 mIsUserEdit = false; 5895 mPreviousOperationWasInSameBatchEdit = false; 5896 } 5897 5898 @Override 5899 public CharSequence filter(CharSequence source, int start, int end, 5900 Spanned dest, int dstart, int dend) { 5901 if (DEBUG_UNDO) { 5902 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 5903 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5904 } 5905 5906 // Check to see if this edit should be tracked for undo. 5907 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5908 return null; 5909 } 5910 5911 final boolean hadComposition = mHasComposition; 5912 mHasComposition = isComposition(source); 5913 final boolean wasExpanding = mExpanding; 5914 boolean shouldCreateSeparateState = false; 5915 if ((end - start) != (dend - dstart)) { 5916 mExpanding = (end - start) > (dend - dstart); 5917 if (hadComposition && mExpanding != wasExpanding) { 5918 shouldCreateSeparateState = true; 5919 } 5920 } 5921 5922 // Handle edit. 5923 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5924 return null; 5925 } 5926 5927 void freezeLastEdit() { 5928 mEditor.mUndoManager.beginUpdate("Edit text"); 5929 EditOperation lastEdit = getLastEdit(); 5930 if (lastEdit != null) { 5931 lastEdit.mFrozen = true; 5932 } 5933 mEditor.mUndoManager.endUpdate(); 5934 } 5935 5936 @Retention(RetentionPolicy.SOURCE) 5937 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5938 private @interface MergeMode {} 5939 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5940 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5941 /** Use {@link EditOperation#mergeWith} to merge */ 5942 private static final int MERGE_EDIT_MODE_NORMAL = 2; 5943 5944 private void handleEdit(CharSequence source, int start, int end, 5945 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5946 // An application may install a TextWatcher to provide additional modifications after 5947 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5948 // string). This results in multiple filter() calls for what the user considers to be 5949 // a single operation. Always undo the whole set of changes in one step. 5950 @MergeMode 5951 final int mergeMode; 5952 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5953 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5954 } else if (shouldCreateSeparateState) { 5955 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5956 } else { 5957 mergeMode = MERGE_EDIT_MODE_NORMAL; 5958 } 5959 // Build a new operation with all the information from this edit. 5960 String newText = TextUtils.substring(source, start, end); 5961 String oldText = TextUtils.substring(dest, dstart, dend); 5962 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5963 mHasComposition); 5964 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5965 return; 5966 } 5967 recordEdit(edit, mergeMode); 5968 } 5969 5970 private EditOperation getLastEdit() { 5971 final UndoManager um = mEditor.mUndoManager; 5972 return um.getLastOperation( 5973 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5974 } 5975 /** 5976 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5977 * If forceMerge is true then the new edit is always merged. 5978 */ 5979 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5980 // Fetch the last edit operation and attempt to merge in the new edit. 5981 final UndoManager um = mEditor.mUndoManager; 5982 um.beginUpdate("Edit text"); 5983 EditOperation lastEdit = getLastEdit(); 5984 if (lastEdit == null) { 5985 // Add this as the first edit. 5986 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5987 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5988 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5989 // Forced merges take priority because they could be the result of a non-user-edit 5990 // change and this case should not create a new undo operation. 5991 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5992 lastEdit.forceMergeWith(edit); 5993 } else if (!mIsUserEdit) { 5994 // An application directly modified the Editable outside of a text edit. Treat this 5995 // as a new change and don't attempt to merge. 5996 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5997 um.commitState(mEditor.mUndoOwner); 5998 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5999 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 6000 // Merge succeeded, nothing else to do. 6001 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 6002 } else { 6003 // Could not merge with the last edit, so commit the last edit and add this edit. 6004 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 6005 um.commitState(mEditor.mUndoOwner); 6006 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6007 } 6008 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 6009 um.endUpdate(); 6010 } 6011 6012 private boolean canUndoEdit(CharSequence source, int start, int end, 6013 Spanned dest, int dstart, int dend) { 6014 if (!mEditor.mAllowUndo) { 6015 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 6016 return false; 6017 } 6018 6019 if (mEditor.mUndoManager.isInUndo()) { 6020 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 6021 return false; 6022 } 6023 6024 // Text filters run before input operations are applied. However, some input operations 6025 // are invalid and will throw exceptions when applied. This is common in tests. Don't 6026 // attempt to undo invalid operations. 6027 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 6028 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 6029 return false; 6030 } 6031 6032 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 6033 // on an input field. Skip no-op changes. 6034 if (start == end && dstart == dend) { 6035 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 6036 return false; 6037 } 6038 6039 return true; 6040 } 6041 6042 private static boolean isComposition(CharSequence source) { 6043 if (!(source instanceof Spannable)) { 6044 return false; 6045 } 6046 // This is a composition edit if the source has a non-zero-length composing span. 6047 Spannable text = (Spannable) source; 6048 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6049 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6050 return composeBegin < composeEnd; 6051 } 6052 6053 private boolean isInTextWatcher() { 6054 CharSequence text = mEditor.mTextView.getText(); 6055 return (text instanceof SpannableStringBuilder) 6056 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6057 } 6058 } 6059 6060 /** 6061 * An operation to undo a single "edit" to a text view. 6062 */ 6063 public static class EditOperation extends UndoOperation<Editor> { 6064 private static final int TYPE_INSERT = 0; 6065 private static final int TYPE_DELETE = 1; 6066 private static final int TYPE_REPLACE = 2; 6067 6068 private int mType; 6069 private String mOldText; 6070 private String mNewText; 6071 private int mStart; 6072 6073 private int mOldCursorPos; 6074 private int mNewCursorPos; 6075 private boolean mFrozen; 6076 private boolean mIsComposition; 6077 6078 /** 6079 * Constructs an edit operation from a text input operation on editor that replaces the 6080 * oldText starting at dstart with newText. 6081 */ 6082 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6083 boolean isComposition) { 6084 super(editor.mUndoOwner); 6085 mOldText = oldText; 6086 mNewText = newText; 6087 6088 // Determine the type of the edit. 6089 if (mNewText.length() > 0 && mOldText.length() == 0) { 6090 mType = TYPE_INSERT; 6091 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6092 mType = TYPE_DELETE; 6093 } else { 6094 mType = TYPE_REPLACE; 6095 } 6096 6097 mStart = dstart; 6098 // Store cursor data. 6099 mOldCursorPos = editor.mTextView.getSelectionStart(); 6100 mNewCursorPos = dstart + mNewText.length(); 6101 mIsComposition = isComposition; 6102 } 6103 6104 public EditOperation(Parcel src, ClassLoader loader) { 6105 super(src, loader); 6106 mType = src.readInt(); 6107 mOldText = src.readString(); 6108 mNewText = src.readString(); 6109 mStart = src.readInt(); 6110 mOldCursorPos = src.readInt(); 6111 mNewCursorPos = src.readInt(); 6112 mFrozen = src.readInt() == 1; 6113 mIsComposition = src.readInt() == 1; 6114 } 6115 6116 @Override 6117 public void writeToParcel(Parcel dest, int flags) { 6118 dest.writeInt(mType); 6119 dest.writeString(mOldText); 6120 dest.writeString(mNewText); 6121 dest.writeInt(mStart); 6122 dest.writeInt(mOldCursorPos); 6123 dest.writeInt(mNewCursorPos); 6124 dest.writeInt(mFrozen ? 1 : 0); 6125 dest.writeInt(mIsComposition ? 1 : 0); 6126 } 6127 6128 private int getNewTextEnd() { 6129 return mStart + mNewText.length(); 6130 } 6131 6132 private int getOldTextEnd() { 6133 return mStart + mOldText.length(); 6134 } 6135 6136 @Override 6137 public void commit() { 6138 } 6139 6140 @Override 6141 public void undo() { 6142 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6143 // Remove the new text and insert the old. 6144 Editor editor = getOwnerData(); 6145 Editable text = (Editable) editor.mTextView.getText(); 6146 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6147 } 6148 6149 @Override 6150 public void redo() { 6151 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6152 // Remove the old text and insert the new. 6153 Editor editor = getOwnerData(); 6154 Editable text = (Editable) editor.mTextView.getText(); 6155 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6156 } 6157 6158 /** 6159 * Attempts to merge this existing operation with a new edit. 6160 * @param edit The new edit operation. 6161 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6162 * object unchanged. 6163 */ 6164 private boolean mergeWith(EditOperation edit) { 6165 if (DEBUG_UNDO) { 6166 Log.d(TAG, "mergeWith old " + this); 6167 Log.d(TAG, "mergeWith new " + edit); 6168 } 6169 6170 if (mFrozen) { 6171 return false; 6172 } 6173 6174 switch (mType) { 6175 case TYPE_INSERT: 6176 return mergeInsertWith(edit); 6177 case TYPE_DELETE: 6178 return mergeDeleteWith(edit); 6179 case TYPE_REPLACE: 6180 return mergeReplaceWith(edit); 6181 default: 6182 return false; 6183 } 6184 } 6185 6186 private boolean mergeInsertWith(EditOperation edit) { 6187 if (edit.mType == TYPE_INSERT) { 6188 // Merge insertions that are contiguous even when it's frozen. 6189 if (getNewTextEnd() != edit.mStart) { 6190 return false; 6191 } 6192 mNewText += edit.mNewText; 6193 mNewCursorPos = edit.mNewCursorPos; 6194 mFrozen = edit.mFrozen; 6195 mIsComposition = edit.mIsComposition; 6196 return true; 6197 } 6198 if (mIsComposition && edit.mType == TYPE_REPLACE 6199 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6200 // Merge insertion with replace as they can be single insertion. 6201 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6202 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6203 mNewCursorPos = edit.mNewCursorPos; 6204 mIsComposition = edit.mIsComposition; 6205 return true; 6206 } 6207 return false; 6208 } 6209 6210 // TODO: Support forward delete. 6211 private boolean mergeDeleteWith(EditOperation edit) { 6212 // Only merge continuous deletes. 6213 if (edit.mType != TYPE_DELETE) { 6214 return false; 6215 } 6216 // Only merge deletions that are contiguous. 6217 if (mStart != edit.getOldTextEnd()) { 6218 return false; 6219 } 6220 mStart = edit.mStart; 6221 mOldText = edit.mOldText + mOldText; 6222 mNewCursorPos = edit.mNewCursorPos; 6223 mIsComposition = edit.mIsComposition; 6224 return true; 6225 } 6226 6227 private boolean mergeReplaceWith(EditOperation edit) { 6228 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6229 // Merge with adjacent insert. 6230 mNewText += edit.mNewText; 6231 mNewCursorPos = edit.mNewCursorPos; 6232 return true; 6233 } 6234 if (!mIsComposition) { 6235 return false; 6236 } 6237 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6238 && getNewTextEnd() >= edit.getOldTextEnd()) { 6239 // Merge with delete as they can be single operation. 6240 mNewText = mNewText.substring(0, edit.mStart - mStart) 6241 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6242 if (mNewText.isEmpty()) { 6243 mType = TYPE_DELETE; 6244 } 6245 mNewCursorPos = edit.mNewCursorPos; 6246 mIsComposition = edit.mIsComposition; 6247 return true; 6248 } 6249 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6250 && TextUtils.equals(mNewText, edit.mOldText)) { 6251 // Merge with the replace that replaces the same region. 6252 mNewText = edit.mNewText; 6253 mNewCursorPos = edit.mNewCursorPos; 6254 mIsComposition = edit.mIsComposition; 6255 return true; 6256 } 6257 return false; 6258 } 6259 6260 /** 6261 * Forcibly creates a single merged edit operation by simulating the entire text 6262 * contents being replaced. 6263 */ 6264 public void forceMergeWith(EditOperation edit) { 6265 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6266 if (mergeWith(edit)) { 6267 return; 6268 } 6269 Editor editor = getOwnerData(); 6270 6271 // Copy the text of the current field. 6272 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6273 // but would require two parallel implementations of modifyText() because Editable and 6274 // StringBuilder do not share an interface for replace/delete/insert. 6275 Editable editable = (Editable) editor.mTextView.getText(); 6276 Editable originalText = new SpannableStringBuilder(editable.toString()); 6277 6278 // Roll back the last operation. 6279 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6280 6281 // Clone the text again and apply the new operation. 6282 Editable finalText = new SpannableStringBuilder(editable.toString()); 6283 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6284 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6285 6286 // Convert this operation into a replace operation. 6287 mType = TYPE_REPLACE; 6288 mNewText = finalText.toString(); 6289 mOldText = originalText.toString(); 6290 mStart = 0; 6291 mNewCursorPos = edit.mNewCursorPos; 6292 mIsComposition = edit.mIsComposition; 6293 // mOldCursorPos is unchanged. 6294 } 6295 6296 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6297 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6298 // Apply the edit if it is still valid. 6299 if (isValidRange(text, deleteFrom, deleteTo) 6300 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6301 if (deleteFrom != deleteTo) { 6302 text.delete(deleteFrom, deleteTo); 6303 } 6304 if (newText.length() != 0) { 6305 text.insert(newTextInsertAt, newText); 6306 } 6307 } 6308 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6309 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6310 // TODO: Select all the text that was undone. 6311 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6312 Selection.setSelection(text, newCursorPos); 6313 } 6314 } 6315 6316 private String getTypeString() { 6317 switch (mType) { 6318 case TYPE_INSERT: 6319 return "insert"; 6320 case TYPE_DELETE: 6321 return "delete"; 6322 case TYPE_REPLACE: 6323 return "replace"; 6324 default: 6325 return ""; 6326 } 6327 } 6328 6329 @Override 6330 public String toString() { 6331 return "[mType=" + getTypeString() + ", " 6332 + "mOldText=" + mOldText + ", " 6333 + "mNewText=" + mNewText + ", " 6334 + "mStart=" + mStart + ", " 6335 + "mOldCursorPos=" + mOldCursorPos + ", " 6336 + "mNewCursorPos=" + mNewCursorPos + ", " 6337 + "mFrozen=" + mFrozen + ", " 6338 + "mIsComposition=" + mIsComposition + "]"; 6339 } 6340 6341 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6342 new Parcelable.ClassLoaderCreator<EditOperation>() { 6343 @Override 6344 public EditOperation createFromParcel(Parcel in) { 6345 return new EditOperation(in, null); 6346 } 6347 6348 @Override 6349 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6350 return new EditOperation(in, loader); 6351 } 6352 6353 @Override 6354 public EditOperation[] newArray(int size) { 6355 return new EditOperation[size]; 6356 } 6357 }; 6358 } 6359 6360 /** 6361 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6362 * These allow external applications to plug into currently selected text. 6363 */ 6364 static final class ProcessTextIntentActionsHandler { 6365 6366 private final Editor mEditor; 6367 private final TextView mTextView; 6368 private final Context mContext; 6369 private final PackageManager mPackageManager; 6370 private final String mPackageName; 6371 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6372 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6373 new SparseArray<>(); 6374 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6375 6376 private ProcessTextIntentActionsHandler(Editor editor) { 6377 mEditor = Preconditions.checkNotNull(editor); 6378 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6379 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6380 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6381 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6382 } 6383 6384 /** 6385 * Adds "PROCESS_TEXT" menu items to the specified menu. 6386 */ 6387 public void onInitializeMenu(Menu menu) { 6388 final int size = mSupportedActivities.size(); 6389 loadSupportedActivities(); 6390 for (int i = 0; i < size; i++) { 6391 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6392 menu.add(Menu.NONE, Menu.NONE, 6393 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6394 getLabel(resolveInfo)) 6395 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6396 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6397 } 6398 } 6399 6400 /** 6401 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6402 * menu item. 6403 * 6404 * @return True if the action was performed, false otherwise. 6405 */ 6406 public boolean performMenuItemAction(MenuItem item) { 6407 return fireIntent(item.getIntent()); 6408 } 6409 6410 /** 6411 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6412 */ 6413 public void initializeAccessibilityActions() { 6414 mAccessibilityIntents.clear(); 6415 mAccessibilityActions.clear(); 6416 int i = 0; 6417 loadSupportedActivities(); 6418 for (ResolveInfo resolveInfo : mSupportedActivities) { 6419 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6420 mAccessibilityActions.put( 6421 actionId, 6422 new AccessibilityNodeInfo.AccessibilityAction( 6423 actionId, getLabel(resolveInfo))); 6424 mAccessibilityIntents.put( 6425 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6426 } 6427 } 6428 6429 /** 6430 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6431 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6432 * latest accessibility actions available for this call. 6433 */ 6434 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6435 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6436 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6437 } 6438 } 6439 6440 /** 6441 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6442 * accessibility action id. 6443 * 6444 * @return True if the action was performed, false otherwise. 6445 */ 6446 public boolean performAccessibilityAction(int actionId) { 6447 return fireIntent(mAccessibilityIntents.get(actionId)); 6448 } 6449 6450 private boolean fireIntent(Intent intent) { 6451 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6452 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 6453 mEditor.mPreserveSelection = true; 6454 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6455 return true; 6456 } 6457 return false; 6458 } 6459 6460 private void loadSupportedActivities() { 6461 mSupportedActivities.clear(); 6462 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6463 List<ResolveInfo> unfiltered = 6464 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6465 for (ResolveInfo info : unfiltered) { 6466 if (isSupportedActivity(info)) { 6467 mSupportedActivities.add(info); 6468 } 6469 } 6470 } 6471 6472 private boolean isSupportedActivity(ResolveInfo info) { 6473 return mPackageName.equals(info.activityInfo.packageName) 6474 || info.activityInfo.exported 6475 && (info.activityInfo.permission == null 6476 || mContext.checkSelfPermission(info.activityInfo.permission) 6477 == PackageManager.PERMISSION_GRANTED); 6478 } 6479 6480 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6481 return createProcessTextIntent() 6482 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6483 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6484 } 6485 6486 private Intent createProcessTextIntent() { 6487 return new Intent() 6488 .setAction(Intent.ACTION_PROCESS_TEXT) 6489 .setType("text/plain"); 6490 } 6491 6492 private CharSequence getLabel(ResolveInfo resolveInfo) { 6493 return resolveInfo.loadLabel(mPackageManager); 6494 } 6495 } 6496} 6497