Editor.java revision 9b4c82a83cc3c1aafac2325d7a601ba3e090b90b
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.IntDef; 21import android.annotation.NonNull; 22import android.annotation.Nullable; 23import android.app.PendingIntent; 24import android.app.PendingIntent.CanceledException; 25import android.content.ClipData; 26import android.content.ClipData.Item; 27import android.content.Context; 28import android.content.Intent; 29import android.content.UndoManager; 30import android.content.UndoOperation; 31import android.content.UndoOwner; 32import android.content.pm.PackageManager; 33import android.content.pm.ResolveInfo; 34import android.content.res.TypedArray; 35import android.graphics.Canvas; 36import android.graphics.Color; 37import android.graphics.Matrix; 38import android.graphics.Paint; 39import android.graphics.Path; 40import android.graphics.Rect; 41import android.graphics.RectF; 42import android.graphics.drawable.ColorDrawable; 43import android.graphics.drawable.Drawable; 44import android.os.Bundle; 45import android.os.LocaleList; 46import android.os.Parcel; 47import android.os.Parcelable; 48import android.os.ParcelableParcel; 49import android.os.SystemClock; 50import android.provider.Settings; 51import android.text.DynamicLayout; 52import android.text.Editable; 53import android.text.InputFilter; 54import android.text.InputType; 55import android.text.Layout; 56import android.text.ParcelableSpan; 57import android.text.Selection; 58import android.text.SpanWatcher; 59import android.text.Spannable; 60import android.text.SpannableStringBuilder; 61import android.text.Spanned; 62import android.text.StaticLayout; 63import android.text.TextUtils; 64import android.text.method.KeyListener; 65import android.text.method.MetaKeyKeyListener; 66import android.text.method.MovementMethod; 67import android.text.method.WordIterator; 68import android.text.style.EasyEditSpan; 69import android.text.style.SuggestionRangeSpan; 70import android.text.style.SuggestionSpan; 71import android.text.style.TextAppearanceSpan; 72import android.text.style.URLSpan; 73import android.util.ArraySet; 74import android.util.DisplayMetrics; 75import android.util.Log; 76import android.util.SparseArray; 77import android.view.ActionMode; 78import android.view.ActionMode.Callback; 79import android.view.ContextMenu; 80import android.view.ContextThemeWrapper; 81import android.view.DisplayListCanvas; 82import android.view.DragAndDropPermissions; 83import android.view.DragEvent; 84import android.view.Gravity; 85import android.view.InputDevice; 86import android.view.LayoutInflater; 87import android.view.Menu; 88import android.view.MenuItem; 89import android.view.MotionEvent; 90import android.view.RenderNode; 91import android.view.SubMenu; 92import android.view.View; 93import android.view.View.DragShadowBuilder; 94import android.view.View.OnClickListener; 95import android.view.ViewConfiguration; 96import android.view.ViewGroup; 97import android.view.ViewGroup.LayoutParams; 98import android.view.ViewTreeObserver; 99import android.view.WindowManager; 100import android.view.accessibility.AccessibilityNodeInfo; 101import android.view.inputmethod.CorrectionInfo; 102import android.view.inputmethod.CursorAnchorInfo; 103import android.view.inputmethod.EditorInfo; 104import android.view.inputmethod.ExtractedText; 105import android.view.inputmethod.ExtractedTextRequest; 106import android.view.inputmethod.InputConnection; 107import android.view.inputmethod.InputMethodManager; 108import android.view.textclassifier.TextClassificationResult; 109import android.widget.AdapterView.OnItemClickListener; 110import android.widget.TextView.Drawables; 111import android.widget.TextView.OnEditorActionListener; 112 113import com.android.internal.annotations.VisibleForTesting; 114import com.android.internal.logging.MetricsLogger; 115import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 116import com.android.internal.util.ArrayUtils; 117import com.android.internal.util.GrowingArrayUtils; 118import com.android.internal.util.Preconditions; 119import com.android.internal.widget.EditableInputConnection; 120 121import java.lang.annotation.Retention; 122import java.lang.annotation.RetentionPolicy; 123import java.text.BreakIterator; 124import java.util.ArrayList; 125import java.util.Arrays; 126import java.util.Comparator; 127import java.util.HashMap; 128import java.util.List; 129 130 131/** 132 * Helper class used by TextView to handle editable text views. 133 * 134 * @hide 135 */ 136public class Editor { 137 private static final String TAG = "Editor"; 138 private static final boolean DEBUG_UNDO = false; 139 140 static final int BLINK = 500; 141 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 142 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 143 private static final int UNSET_X_VALUE = -1; 144 private static final int UNSET_LINE = -1; 145 // Tag used when the Editor maintains its own separate UndoManager. 146 private static final String UNDO_OWNER_TAG = "Editor"; 147 148 // Ordering constants used to place the Action Mode or context menu items in their menu. 149 private static final int MENU_ITEM_ORDER_ASSIST = 1; 150 private static final int MENU_ITEM_ORDER_UNDO = 2; 151 private static final int MENU_ITEM_ORDER_REDO = 3; 152 private static final int MENU_ITEM_ORDER_CUT = 4; 153 private static final int MENU_ITEM_ORDER_COPY = 5; 154 private static final int MENU_ITEM_ORDER_PASTE = 6; 155 private static final int MENU_ITEM_ORDER_SHARE = 7; 156 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 8; 157 private static final int MENU_ITEM_ORDER_SELECT_ALL = 9; 158 private static final int MENU_ITEM_ORDER_REPLACE = 10; 159 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 11; 160 161 // Each Editor manages its own undo stack. 162 private final UndoManager mUndoManager = new UndoManager(); 163 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 164 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 165 boolean mAllowUndo = true; 166 167 // Cursor Controllers. 168 private InsertionPointCursorController mInsertionPointCursorController; 169 SelectionModifierCursorController mSelectionModifierCursorController; 170 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 171 private ActionMode mTextActionMode; 172 private boolean mInsertionControllerEnabled; 173 private boolean mSelectionControllerEnabled; 174 175 // Used to highlight a word when it is corrected by the IME 176 private CorrectionHighlighter mCorrectionHighlighter; 177 178 InputContentType mInputContentType; 179 InputMethodState mInputMethodState; 180 181 private static class TextRenderNode { 182 // Render node has 3 recording states: 183 // 1. Recorded operations are valid. 184 // #needsRecord() returns false, but needsToBeShifted is false. 185 // 2. Recorded operations are not valid, but just the position needed to be updated. 186 // #needsRecord() returns false, but needsToBeShifted is true. 187 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 188 // true. 189 RenderNode renderNode; 190 boolean isDirty; 191 // Becomes true when recorded operations can be reused, but the position has to be updated. 192 boolean needsToBeShifted; 193 public TextRenderNode(String name) { 194 renderNode = RenderNode.create(name, null); 195 isDirty = true; 196 needsToBeShifted = true; 197 } 198 boolean needsRecord() { 199 return isDirty || !renderNode.isValid(); 200 } 201 } 202 private TextRenderNode[] mTextRenderNodes; 203 204 boolean mFrozenWithFocus; 205 boolean mSelectionMoved; 206 boolean mTouchFocusSelected; 207 208 KeyListener mKeyListener; 209 int mInputType = EditorInfo.TYPE_NULL; 210 211 boolean mDiscardNextActionUp; 212 boolean mIgnoreActionUpEvent; 213 214 long mShowCursor; 215 private Blink mBlink; 216 217 boolean mCursorVisible = true; 218 boolean mSelectAllOnFocus; 219 boolean mTextIsSelectable; 220 221 CharSequence mError; 222 boolean mErrorWasChanged; 223 private ErrorPopup mErrorPopup; 224 225 /** 226 * This flag is set if the TextView tries to display an error before it 227 * is attached to the window (so its position is still unknown). 228 * It causes the error to be shown later, when onAttachedToWindow() 229 * is called. 230 */ 231 private boolean mShowErrorAfterAttach; 232 233 boolean mInBatchEditControllers; 234 boolean mShowSoftInputOnFocus = true; 235 private boolean mPreserveSelection; 236 private boolean mRestartActionModeOnNextRefresh; 237 238 private SelectionActionModeHelper mSelectionActionModeHelper; 239 240 boolean mIsBeingLongClicked; 241 242 private SuggestionsPopupWindow mSuggestionsPopupWindow; 243 SuggestionRangeSpan mSuggestionRangeSpan; 244 private Runnable mShowSuggestionRunnable; 245 246 final Drawable[] mCursorDrawable = new Drawable[2]; 247 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 248 249 private Drawable mSelectHandleLeft; 250 private Drawable mSelectHandleRight; 251 private Drawable mSelectHandleCenter; 252 253 // Global listener that detects changes in the global position of the TextView 254 private PositionListener mPositionListener; 255 256 private float mLastDownPositionX, mLastDownPositionY; 257 private float mContextMenuAnchorX, mContextMenuAnchorY; 258 Callback mCustomSelectionActionModeCallback; 259 Callback mCustomInsertionActionModeCallback; 260 261 // Set when this TextView gained focus with some text selected. Will start selection mode. 262 boolean mCreatedWithASelection; 263 264 // Indicates the current tap state (first tap, double tap, or triple click). 265 private int mTapState = TAP_STATE_INITIAL; 266 private long mLastTouchUpTime = 0; 267 private static final int TAP_STATE_INITIAL = 0; 268 private static final int TAP_STATE_FIRST_TAP = 1; 269 private static final int TAP_STATE_DOUBLE_TAP = 2; 270 // Only for mouse input. 271 private static final int TAP_STATE_TRIPLE_CLICK = 3; 272 273 // The button state as of the last time #onTouchEvent is called. 274 private int mLastButtonState; 275 276 private Runnable mInsertionActionModeRunnable; 277 278 // The span controller helps monitoring the changes to which the Editor needs to react: 279 // - EasyEditSpans, for which we have some UI to display on attach and on hide 280 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 281 private SpanController mSpanController; 282 283 private WordIterator mWordIterator; 284 SpellChecker mSpellChecker; 285 286 // This word iterator is set with text and used to determine word boundaries 287 // when a user is selecting text. 288 private WordIterator mWordIteratorWithText; 289 // Indicate that the text in the word iterator needs to be updated. 290 private boolean mUpdateWordIteratorText; 291 292 private Rect mTempRect; 293 294 private final TextView mTextView; 295 296 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 297 298 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 299 new CursorAnchorInfoNotifier(); 300 301 private final Runnable mShowFloatingToolbar = new Runnable() { 302 @Override 303 public void run() { 304 if (mTextActionMode != null) { 305 mTextActionMode.hide(0); // hide off. 306 } 307 } 308 }; 309 310 boolean mIsInsertionActionModeStartPending = false; 311 312 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 313 314 Editor(TextView textView) { 315 mTextView = textView; 316 // Synchronize the filter list, which places the undo input filter at the end. 317 mTextView.setFilters(mTextView.getFilters()); 318 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 319 } 320 321 ParcelableParcel saveInstanceState() { 322 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 323 Parcel parcel = state.getParcel(); 324 mUndoManager.saveInstanceState(parcel); 325 mUndoInputFilter.saveInstanceState(parcel); 326 return state; 327 } 328 329 void restoreInstanceState(ParcelableParcel state) { 330 Parcel parcel = state.getParcel(); 331 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 332 mUndoInputFilter.restoreInstanceState(parcel); 333 // Re-associate this object as the owner of undo state. 334 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 335 } 336 337 /** 338 * Forgets all undo and redo operations for this Editor. 339 */ 340 void forgetUndoRedo() { 341 UndoOwner[] owners = { mUndoOwner }; 342 mUndoManager.forgetUndos(owners, -1 /* all */); 343 mUndoManager.forgetRedos(owners, -1 /* all */); 344 } 345 346 boolean canUndo() { 347 UndoOwner[] owners = { mUndoOwner }; 348 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 349 } 350 351 boolean canRedo() { 352 UndoOwner[] owners = { mUndoOwner }; 353 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 354 } 355 356 void undo() { 357 if (!mAllowUndo) { 358 return; 359 } 360 UndoOwner[] owners = { mUndoOwner }; 361 mUndoManager.undo(owners, 1); // Undo 1 action. 362 } 363 364 void redo() { 365 if (!mAllowUndo) { 366 return; 367 } 368 UndoOwner[] owners = { mUndoOwner }; 369 mUndoManager.redo(owners, 1); // Redo 1 action. 370 } 371 372 void replace() { 373 if (mSuggestionsPopupWindow == null) { 374 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 375 } 376 hideCursorAndSpanControllers(); 377 mSuggestionsPopupWindow.show(); 378 379 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 380 Selection.setSelection((Spannable) mTextView.getText(), middle); 381 } 382 383 void onAttachedToWindow() { 384 if (mShowErrorAfterAttach) { 385 showError(); 386 mShowErrorAfterAttach = false; 387 } 388 389 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 390 // No need to create the controller. 391 // The get method will add the listener on controller creation. 392 if (mInsertionPointCursorController != null) { 393 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 394 } 395 if (mSelectionModifierCursorController != null) { 396 mSelectionModifierCursorController.resetTouchOffsets(); 397 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 398 } 399 updateSpellCheckSpans(0, mTextView.getText().length(), 400 true /* create the spell checker if needed */); 401 402 if (mTextView.hasSelection()) { 403 refreshTextActionMode(); 404 } 405 406 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 407 resumeBlink(); 408 } 409 410 void onDetachedFromWindow() { 411 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 412 413 if (mError != null) { 414 hideError(); 415 } 416 417 suspendBlink(); 418 419 if (mInsertionPointCursorController != null) { 420 mInsertionPointCursorController.onDetached(); 421 } 422 423 if (mSelectionModifierCursorController != null) { 424 mSelectionModifierCursorController.onDetached(); 425 } 426 427 if (mShowSuggestionRunnable != null) { 428 mTextView.removeCallbacks(mShowSuggestionRunnable); 429 } 430 431 // Cancel the single tap delayed runnable. 432 if (mInsertionActionModeRunnable != null) { 433 mTextView.removeCallbacks(mInsertionActionModeRunnable); 434 } 435 436 mTextView.removeCallbacks(mShowFloatingToolbar); 437 438 discardTextDisplayLists(); 439 440 if (mSpellChecker != null) { 441 mSpellChecker.closeSession(); 442 // Forces the creation of a new SpellChecker next time this window is created. 443 // Will handle the cases where the settings has been changed in the meantime. 444 mSpellChecker = null; 445 } 446 447 hideCursorAndSpanControllers(); 448 stopTextActionModeWithPreservingSelection(); 449 } 450 451 private void discardTextDisplayLists() { 452 if (mTextRenderNodes != null) { 453 for (int i = 0; i < mTextRenderNodes.length; i++) { 454 RenderNode displayList = mTextRenderNodes[i] != null 455 ? mTextRenderNodes[i].renderNode : null; 456 if (displayList != null && displayList.isValid()) { 457 displayList.discardDisplayList(); 458 } 459 } 460 } 461 } 462 463 private void showError() { 464 if (mTextView.getWindowToken() == null) { 465 mShowErrorAfterAttach = true; 466 return; 467 } 468 469 if (mErrorPopup == null) { 470 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 471 final TextView err = (TextView) inflater.inflate( 472 com.android.internal.R.layout.textview_hint, null); 473 474 final float scale = mTextView.getResources().getDisplayMetrics().density; 475 mErrorPopup = 476 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 477 mErrorPopup.setFocusable(false); 478 // The user is entering text, so the input method is needed. We 479 // don't want the popup to be displayed on top of it. 480 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 481 } 482 483 TextView tv = (TextView) mErrorPopup.getContentView(); 484 chooseSize(mErrorPopup, mError, tv); 485 tv.setText(mError); 486 487 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 488 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 489 } 490 491 public void setError(CharSequence error, Drawable icon) { 492 mError = TextUtils.stringOrSpannedString(error); 493 mErrorWasChanged = true; 494 495 if (mError == null) { 496 setErrorIcon(null); 497 if (mErrorPopup != null) { 498 if (mErrorPopup.isShowing()) { 499 mErrorPopup.dismiss(); 500 } 501 502 mErrorPopup = null; 503 } 504 mShowErrorAfterAttach = false; 505 } else { 506 setErrorIcon(icon); 507 if (mTextView.isFocused()) { 508 showError(); 509 } 510 } 511 } 512 513 private void setErrorIcon(Drawable icon) { 514 Drawables dr = mTextView.mDrawables; 515 if (dr == null) { 516 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 517 } 518 dr.setErrorDrawable(icon, mTextView); 519 520 mTextView.resetResolvedDrawables(); 521 mTextView.invalidate(); 522 mTextView.requestLayout(); 523 } 524 525 private void hideError() { 526 if (mErrorPopup != null) { 527 if (mErrorPopup.isShowing()) { 528 mErrorPopup.dismiss(); 529 } 530 } 531 532 mShowErrorAfterAttach = false; 533 } 534 535 /** 536 * Returns the X offset to make the pointy top of the error point 537 * at the middle of the error icon. 538 */ 539 private int getErrorX() { 540 /* 541 * The "25" is the distance between the point and the right edge 542 * of the background 543 */ 544 final float scale = mTextView.getResources().getDisplayMetrics().density; 545 546 final Drawables dr = mTextView.mDrawables; 547 548 final int layoutDirection = mTextView.getLayoutDirection(); 549 int errorX; 550 int offset; 551 switch (layoutDirection) { 552 default: 553 case View.LAYOUT_DIRECTION_LTR: 554 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 555 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 556 - mTextView.getPaddingRight() + offset; 557 break; 558 case View.LAYOUT_DIRECTION_RTL: 559 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 560 errorX = mTextView.getPaddingLeft() + offset; 561 break; 562 } 563 return errorX; 564 } 565 566 /** 567 * Returns the Y offset to make the pointy top of the error point 568 * at the bottom of the error icon. 569 */ 570 private int getErrorY() { 571 /* 572 * Compound, not extended, because the icon is not clipped 573 * if the text height is smaller. 574 */ 575 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 576 int vspace = mTextView.getBottom() - mTextView.getTop() 577 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 578 579 final Drawables dr = mTextView.mDrawables; 580 581 final int layoutDirection = mTextView.getLayoutDirection(); 582 int height; 583 switch (layoutDirection) { 584 default: 585 case View.LAYOUT_DIRECTION_LTR: 586 height = (dr != null ? dr.mDrawableHeightRight : 0); 587 break; 588 case View.LAYOUT_DIRECTION_RTL: 589 height = (dr != null ? dr.mDrawableHeightLeft : 0); 590 break; 591 } 592 593 int icontop = compoundPaddingTop + (vspace - height) / 2; 594 595 /* 596 * The "2" is the distance between the point and the top edge 597 * of the background. 598 */ 599 final float scale = mTextView.getResources().getDisplayMetrics().density; 600 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 601 } 602 603 void createInputContentTypeIfNeeded() { 604 if (mInputContentType == null) { 605 mInputContentType = new InputContentType(); 606 } 607 } 608 609 void createInputMethodStateIfNeeded() { 610 if (mInputMethodState == null) { 611 mInputMethodState = new InputMethodState(); 612 } 613 } 614 615 boolean isCursorVisible() { 616 // The default value is true, even when there is no associated Editor 617 return mCursorVisible && mTextView.isTextEditable(); 618 } 619 620 void prepareCursorControllers() { 621 boolean windowSupportsHandles = false; 622 623 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 624 if (params instanceof WindowManager.LayoutParams) { 625 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 626 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 627 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 628 } 629 630 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 631 mInsertionControllerEnabled = enabled && isCursorVisible(); 632 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 633 634 if (!mInsertionControllerEnabled) { 635 hideInsertionPointCursorController(); 636 if (mInsertionPointCursorController != null) { 637 mInsertionPointCursorController.onDetached(); 638 mInsertionPointCursorController = null; 639 } 640 } 641 642 if (!mSelectionControllerEnabled) { 643 stopTextActionMode(); 644 if (mSelectionModifierCursorController != null) { 645 mSelectionModifierCursorController.onDetached(); 646 mSelectionModifierCursorController = null; 647 } 648 } 649 } 650 651 void hideInsertionPointCursorController() { 652 if (mInsertionPointCursorController != null) { 653 mInsertionPointCursorController.hide(); 654 } 655 } 656 657 /** 658 * Hides the insertion and span controllers. 659 */ 660 void hideCursorAndSpanControllers() { 661 hideCursorControllers(); 662 hideSpanControllers(); 663 } 664 665 private void hideSpanControllers() { 666 if (mSpanController != null) { 667 mSpanController.hide(); 668 } 669 } 670 671 private void hideCursorControllers() { 672 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 673 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 674 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 675 // to distinguish one from the other. 676 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 677 || !mSuggestionsPopupWindow.isShowingUp())) { 678 // Should be done before hide insertion point controller since it triggers a show of it 679 mSuggestionsPopupWindow.hide(); 680 } 681 hideInsertionPointCursorController(); 682 } 683 684 /** 685 * Create new SpellCheckSpans on the modified region. 686 */ 687 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 688 // Remove spans whose adjacent characters are text not punctuation 689 mTextView.removeAdjacentSuggestionSpans(start); 690 mTextView.removeAdjacentSuggestionSpans(end); 691 692 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 693 && !(mTextView.isInExtractedMode())) { 694 if (mSpellChecker == null && createSpellChecker) { 695 mSpellChecker = new SpellChecker(mTextView); 696 } 697 if (mSpellChecker != null) { 698 mSpellChecker.spellCheck(start, end); 699 } 700 } 701 } 702 703 void onScreenStateChanged(int screenState) { 704 switch (screenState) { 705 case View.SCREEN_STATE_ON: 706 resumeBlink(); 707 break; 708 case View.SCREEN_STATE_OFF: 709 suspendBlink(); 710 break; 711 } 712 } 713 714 private void suspendBlink() { 715 if (mBlink != null) { 716 mBlink.cancel(); 717 } 718 } 719 720 private void resumeBlink() { 721 if (mBlink != null) { 722 mBlink.uncancel(); 723 makeBlink(); 724 } 725 } 726 727 void adjustInputType(boolean password, boolean passwordInputType, 728 boolean webPasswordInputType, boolean numberPasswordInputType) { 729 // mInputType has been set from inputType, possibly modified by mInputMethod. 730 // Specialize mInputType to [web]password if we have a text class and the original input 731 // type was a password. 732 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 733 if (password || passwordInputType) { 734 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 735 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 736 } 737 if (webPasswordInputType) { 738 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 739 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 740 } 741 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 742 if (numberPasswordInputType) { 743 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 744 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 745 } 746 } 747 } 748 749 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 750 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 751 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 752 753 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 754 com.android.internal.R.dimen.textview_error_popup_default_width); 755 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 756 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 757 float max = 0; 758 for (int i = 0; i < l.getLineCount(); i++) { 759 max = Math.max(max, l.getLineWidth(i)); 760 } 761 762 /* 763 * Now set the popup size to be big enough for the text plus the border capped 764 * to DEFAULT_MAX_POPUP_WIDTH 765 */ 766 pop.setWidth(wid + (int) Math.ceil(max)); 767 pop.setHeight(ht + l.getHeight()); 768 } 769 770 void setFrame() { 771 if (mErrorPopup != null) { 772 TextView tv = (TextView) mErrorPopup.getContentView(); 773 chooseSize(mErrorPopup, mError, tv); 774 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 775 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 776 } 777 } 778 779 private int getWordStart(int offset) { 780 // FIXME - For this and similar methods we're not doing anything to check if there's 781 // a LocaleSpan in the text, this may be something we should try handling or checking for. 782 int retOffset = getWordIteratorWithText().prevBoundary(offset); 783 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 784 // On punctuation boundary or within group of punctuation, find punctuation start. 785 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 786 } else { 787 // Not on a punctuation boundary, find the word start. 788 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 789 } 790 if (retOffset == BreakIterator.DONE) { 791 return offset; 792 } 793 return retOffset; 794 } 795 796 private int getWordEnd(int offset) { 797 int retOffset = getWordIteratorWithText().nextBoundary(offset); 798 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 799 // On punctuation boundary or within group of punctuation, find punctuation end. 800 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 801 } else { 802 // Not on a punctuation boundary, find the word end. 803 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 804 } 805 if (retOffset == BreakIterator.DONE) { 806 return offset; 807 } 808 return retOffset; 809 } 810 811 private boolean needsToSelectAllToSelectWordOrParagraph() { 812 if (mTextView.hasPasswordTransformationMethod()) { 813 // Always select all on a password field. 814 // Cut/copy menu entries are not available for passwords, but being able to select all 815 // is however useful to delete or paste to replace the entire content. 816 return true; 817 } 818 819 int inputType = mTextView.getInputType(); 820 int klass = inputType & InputType.TYPE_MASK_CLASS; 821 int variation = inputType & InputType.TYPE_MASK_VARIATION; 822 823 // Specific text field types: select the entire text for these 824 if (klass == InputType.TYPE_CLASS_NUMBER 825 || klass == InputType.TYPE_CLASS_PHONE 826 || klass == InputType.TYPE_CLASS_DATETIME 827 || variation == InputType.TYPE_TEXT_VARIATION_URI 828 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 829 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 830 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 831 return true; 832 } 833 return false; 834 } 835 836 /** 837 * Adjusts selection to the word under last touch offset. Return true if the operation was 838 * successfully performed. 839 */ 840 private boolean selectCurrentWord() { 841 if (!mTextView.canSelectText()) { 842 return false; 843 } 844 845 if (needsToSelectAllToSelectWordOrParagraph()) { 846 return mTextView.selectAllText(); 847 } 848 849 long lastTouchOffsets = getLastTouchOffsets(); 850 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 851 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 852 853 // Safety check in case standard touch event handling has been bypassed 854 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 855 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 856 857 int selectionStart, selectionEnd; 858 859 // If a URLSpan (web address, email, phone...) is found at that position, select it. 860 URLSpan[] urlSpans = 861 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 862 if (urlSpans.length >= 1) { 863 URLSpan urlSpan = urlSpans[0]; 864 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 865 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 866 } else { 867 // FIXME - We should check if there's a LocaleSpan in the text, this may be 868 // something we should try handling or checking for. 869 final WordIterator wordIterator = getWordIterator(); 870 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 871 872 selectionStart = wordIterator.getBeginning(minOffset); 873 selectionEnd = wordIterator.getEnd(maxOffset); 874 875 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 876 || selectionStart == selectionEnd) { 877 // Possible when the word iterator does not properly handle the text's language 878 long range = getCharClusterRange(minOffset); 879 selectionStart = TextUtils.unpackRangeStartFromLong(range); 880 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 881 } 882 } 883 884 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 885 return selectionEnd > selectionStart; 886 } 887 888 /** 889 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 890 * successfully performed. 891 */ 892 private boolean selectCurrentParagraph() { 893 if (!mTextView.canSelectText()) { 894 return false; 895 } 896 897 if (needsToSelectAllToSelectWordOrParagraph()) { 898 return mTextView.selectAllText(); 899 } 900 901 long lastTouchOffsets = getLastTouchOffsets(); 902 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 903 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 904 905 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 906 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 907 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 908 if (start < end) { 909 Selection.setSelection((Spannable) mTextView.getText(), start, end); 910 return true; 911 } 912 return false; 913 } 914 915 /** 916 * Get the minimum range of paragraphs that contains startOffset and endOffset. 917 */ 918 private long getParagraphsRange(int startOffset, int endOffset) { 919 final Layout layout = mTextView.getLayout(); 920 if (layout == null) { 921 return TextUtils.packRangeInLong(-1, -1); 922 } 923 final CharSequence text = mTextView.getText(); 924 int minLine = layout.getLineForOffset(startOffset); 925 // Search paragraph start. 926 while (minLine > 0) { 927 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 928 if (text.charAt(prevLineEndOffset - 1) == '\n') { 929 break; 930 } 931 minLine--; 932 } 933 int maxLine = layout.getLineForOffset(endOffset); 934 // Search paragraph end. 935 while (maxLine < layout.getLineCount() - 1) { 936 final int lineEndOffset = layout.getLineEnd(maxLine); 937 if (text.charAt(lineEndOffset - 1) == '\n') { 938 break; 939 } 940 maxLine++; 941 } 942 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 943 } 944 945 void onLocaleChanged() { 946 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 947 // proper new locale 948 mWordIterator = null; 949 mWordIteratorWithText = null; 950 } 951 952 public WordIterator getWordIterator() { 953 if (mWordIterator == null) { 954 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 955 } 956 return mWordIterator; 957 } 958 959 private WordIterator getWordIteratorWithText() { 960 if (mWordIteratorWithText == null) { 961 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 962 mUpdateWordIteratorText = true; 963 } 964 if (mUpdateWordIteratorText) { 965 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 966 // to the user's selection is needed. A possible solution would be to 967 // copy some number N of characters near the selection and then when the 968 // user approaches N then we'd do another copy of the next N characters. 969 CharSequence text = mTextView.getText(); 970 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 971 mUpdateWordIteratorText = false; 972 } 973 return mWordIteratorWithText; 974 } 975 976 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 977 final Layout layout = mTextView.getLayout(); 978 if (layout == null) return offset; 979 return findAfterGivenOffset == layout.isRtlCharAt(offset) 980 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 981 } 982 983 private long getCharClusterRange(int offset) { 984 final int textLength = mTextView.getText().length(); 985 if (offset < textLength) { 986 final int clusterEndOffset = getNextCursorOffset(offset, true); 987 return TextUtils.packRangeInLong( 988 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 989 } 990 if (offset - 1 >= 0) { 991 final int clusterStartOffset = getNextCursorOffset(offset, false); 992 return TextUtils.packRangeInLong(clusterStartOffset, 993 getNextCursorOffset(clusterStartOffset, true)); 994 } 995 return TextUtils.packRangeInLong(offset, offset); 996 } 997 998 private boolean touchPositionIsInSelection() { 999 int selectionStart = mTextView.getSelectionStart(); 1000 int selectionEnd = mTextView.getSelectionEnd(); 1001 1002 if (selectionStart == selectionEnd) { 1003 return false; 1004 } 1005 1006 if (selectionStart > selectionEnd) { 1007 int tmp = selectionStart; 1008 selectionStart = selectionEnd; 1009 selectionEnd = tmp; 1010 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1011 } 1012 1013 SelectionModifierCursorController selectionController = getSelectionController(); 1014 int minOffset = selectionController.getMinTouchOffset(); 1015 int maxOffset = selectionController.getMaxTouchOffset(); 1016 1017 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1018 } 1019 1020 private PositionListener getPositionListener() { 1021 if (mPositionListener == null) { 1022 mPositionListener = new PositionListener(); 1023 } 1024 return mPositionListener; 1025 } 1026 1027 private interface TextViewPositionListener { 1028 public void updatePosition(int parentPositionX, int parentPositionY, 1029 boolean parentPositionChanged, boolean parentScrolled); 1030 } 1031 1032 private boolean isOffsetVisible(int offset) { 1033 Layout layout = mTextView.getLayout(); 1034 if (layout == null) return false; 1035 1036 final int line = layout.getLineForOffset(offset); 1037 final int lineBottom = layout.getLineBottom(line); 1038 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1039 return mTextView.isPositionVisible( 1040 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1041 lineBottom + mTextView.viewportToContentVerticalOffset()); 1042 } 1043 1044 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1045 * in the view. Returns false when the position is in the empty space of left/right of text. 1046 */ 1047 private boolean isPositionOnText(float x, float y) { 1048 Layout layout = mTextView.getLayout(); 1049 if (layout == null) return false; 1050 1051 final int line = mTextView.getLineAtCoordinate(y); 1052 x = mTextView.convertToLocalHorizontalCoordinate(x); 1053 1054 if (x < layout.getLineLeft(line)) return false; 1055 if (x > layout.getLineRight(line)) return false; 1056 return true; 1057 } 1058 1059 private void startDragAndDrop() { 1060 // TODO: Fix drag and drop in full screen extracted mode. 1061 if (mTextView.isInExtractedMode()) { 1062 return; 1063 } 1064 final int start = mTextView.getSelectionStart(); 1065 final int end = mTextView.getSelectionEnd(); 1066 CharSequence selectedText = mTextView.getTransformedText(start, end); 1067 ClipData data = ClipData.newPlainText(null, selectedText); 1068 DragLocalState localState = new DragLocalState(mTextView, start, end); 1069 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1070 View.DRAG_FLAG_GLOBAL); 1071 stopTextActionMode(); 1072 if (hasSelectionController()) { 1073 getSelectionController().resetTouchOffsets(); 1074 } 1075 } 1076 1077 public boolean performLongClick(boolean handled) { 1078 // Long press in empty space moves cursor and starts the insertion action mode. 1079 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1080 && mInsertionControllerEnabled) { 1081 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1082 mLastDownPositionY); 1083 Selection.setSelection((Spannable) mTextView.getText(), offset); 1084 getInsertionController().show(); 1085 mIsInsertionActionModeStartPending = true; 1086 handled = true; 1087 MetricsLogger.action( 1088 mTextView.getContext(), 1089 MetricsEvent.TEXT_LONGPRESS, 1090 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1091 } 1092 1093 if (!handled && mTextActionMode != null) { 1094 if (touchPositionIsInSelection()) { 1095 startDragAndDrop(); 1096 MetricsLogger.action( 1097 mTextView.getContext(), 1098 MetricsEvent.TEXT_LONGPRESS, 1099 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1100 } else { 1101 stopTextActionMode(); 1102 selectCurrentWordAndStartDrag(); 1103 MetricsLogger.action( 1104 mTextView.getContext(), 1105 MetricsEvent.TEXT_LONGPRESS, 1106 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1107 } 1108 handled = true; 1109 } 1110 1111 // Start a new selection 1112 if (!handled) { 1113 handled = selectCurrentWordAndStartDrag(); 1114 if (handled) { 1115 MetricsLogger.action( 1116 mTextView.getContext(), 1117 MetricsEvent.TEXT_LONGPRESS, 1118 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1119 } 1120 } 1121 1122 return handled; 1123 } 1124 1125 private long getLastTouchOffsets() { 1126 SelectionModifierCursorController selectionController = getSelectionController(); 1127 final int minOffset = selectionController.getMinTouchOffset(); 1128 final int maxOffset = selectionController.getMaxTouchOffset(); 1129 return TextUtils.packRangeInLong(minOffset, maxOffset); 1130 } 1131 1132 void onFocusChanged(boolean focused, int direction) { 1133 mShowCursor = SystemClock.uptimeMillis(); 1134 ensureEndedBatchEdit(); 1135 1136 if (focused) { 1137 int selStart = mTextView.getSelectionStart(); 1138 int selEnd = mTextView.getSelectionEnd(); 1139 1140 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1141 // mode for these, unless there was a specific selection already started. 1142 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1143 && selEnd == mTextView.getText().length(); 1144 1145 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1146 && !isFocusHighlighted; 1147 1148 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1149 // If a tap was used to give focus to that view, move cursor at tap position. 1150 // Has to be done before onTakeFocus, which can be overloaded. 1151 final int lastTapPosition = getLastTapPosition(); 1152 if (lastTapPosition >= 0) { 1153 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1154 } 1155 1156 // Note this may have to be moved out of the Editor class 1157 MovementMethod mMovement = mTextView.getMovementMethod(); 1158 if (mMovement != null) { 1159 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1160 } 1161 1162 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1163 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1164 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1165 // This special case ensure that we keep current selection in that case. 1166 // It would be better to know why the DecorView does not have focus at that time. 1167 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1168 && selStart >= 0 && selEnd >= 0) { 1169 /* 1170 * Someone intentionally set the selection, so let them 1171 * do whatever it is that they wanted to do instead of 1172 * the default on-focus behavior. We reset the selection 1173 * here instead of just skipping the onTakeFocus() call 1174 * because some movement methods do something other than 1175 * just setting the selection in theirs and we still 1176 * need to go through that path. 1177 */ 1178 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1179 } 1180 1181 if (mSelectAllOnFocus) { 1182 mTextView.selectAllText(); 1183 } 1184 1185 mTouchFocusSelected = true; 1186 } 1187 1188 mFrozenWithFocus = false; 1189 mSelectionMoved = false; 1190 1191 if (mError != null) { 1192 showError(); 1193 } 1194 1195 makeBlink(); 1196 } else { 1197 if (mError != null) { 1198 hideError(); 1199 } 1200 // Don't leave us in the middle of a batch edit. 1201 mTextView.onEndBatchEdit(); 1202 1203 if (mTextView.isInExtractedMode()) { 1204 hideCursorAndSpanControllers(); 1205 stopTextActionModeWithPreservingSelection(); 1206 } else { 1207 hideCursorAndSpanControllers(); 1208 if (mTextView.isTemporarilyDetached()) { 1209 stopTextActionModeWithPreservingSelection(); 1210 } else { 1211 stopTextActionMode(); 1212 } 1213 downgradeEasyCorrectionSpans(); 1214 } 1215 // No need to create the controller 1216 if (mSelectionModifierCursorController != null) { 1217 mSelectionModifierCursorController.resetTouchOffsets(); 1218 } 1219 } 1220 } 1221 1222 /** 1223 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1224 * span. 1225 */ 1226 private void downgradeEasyCorrectionSpans() { 1227 CharSequence text = mTextView.getText(); 1228 if (text instanceof Spannable) { 1229 Spannable spannable = (Spannable) text; 1230 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1231 spannable.length(), SuggestionSpan.class); 1232 for (int i = 0; i < suggestionSpans.length; i++) { 1233 int flags = suggestionSpans[i].getFlags(); 1234 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1235 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1236 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1237 suggestionSpans[i].setFlags(flags); 1238 } 1239 } 1240 } 1241 } 1242 1243 void sendOnTextChanged(int start, int after) { 1244 updateSpellCheckSpans(start, start + after, false); 1245 1246 // Flip flag to indicate the word iterator needs to have the text reset. 1247 mUpdateWordIteratorText = true; 1248 1249 // Hide the controllers as soon as text is modified (typing, procedural...) 1250 // We do not hide the span controllers, since they can be added when a new text is 1251 // inserted into the text view (voice IME). 1252 hideCursorControllers(); 1253 // Reset drag accelerator. 1254 if (mSelectionModifierCursorController != null) { 1255 mSelectionModifierCursorController.resetTouchOffsets(); 1256 } 1257 stopTextActionMode(); 1258 } 1259 1260 private int getLastTapPosition() { 1261 // No need to create the controller at that point, no last tap position saved 1262 if (mSelectionModifierCursorController != null) { 1263 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1264 if (lastTapPosition >= 0) { 1265 // Safety check, should not be possible. 1266 if (lastTapPosition > mTextView.getText().length()) { 1267 lastTapPosition = mTextView.getText().length(); 1268 } 1269 return lastTapPosition; 1270 } 1271 } 1272 1273 return -1; 1274 } 1275 1276 void onWindowFocusChanged(boolean hasWindowFocus) { 1277 if (hasWindowFocus) { 1278 if (mBlink != null) { 1279 mBlink.uncancel(); 1280 makeBlink(); 1281 } 1282 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1283 refreshTextActionMode(); 1284 } 1285 } else { 1286 if (mBlink != null) { 1287 mBlink.cancel(); 1288 } 1289 if (mInputContentType != null) { 1290 mInputContentType.enterDown = false; 1291 } 1292 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1293 hideCursorAndSpanControllers(); 1294 stopTextActionModeWithPreservingSelection(); 1295 if (mSuggestionsPopupWindow != null) { 1296 mSuggestionsPopupWindow.onParentLostFocus(); 1297 } 1298 1299 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1300 ensureEndedBatchEdit(); 1301 } 1302 } 1303 1304 private void updateTapState(MotionEvent event) { 1305 final int action = event.getActionMasked(); 1306 if (action == MotionEvent.ACTION_DOWN) { 1307 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1308 // Detect double tap and triple click. 1309 if (((mTapState == TAP_STATE_FIRST_TAP) 1310 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1311 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1312 <= ViewConfiguration.getDoubleTapTimeout()) { 1313 if (mTapState == TAP_STATE_FIRST_TAP) { 1314 mTapState = TAP_STATE_DOUBLE_TAP; 1315 } else { 1316 mTapState = TAP_STATE_TRIPLE_CLICK; 1317 } 1318 } else { 1319 mTapState = TAP_STATE_FIRST_TAP; 1320 } 1321 } 1322 if (action == MotionEvent.ACTION_UP) { 1323 mLastTouchUpTime = SystemClock.uptimeMillis(); 1324 } 1325 } 1326 1327 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1328 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1329 return false; 1330 } 1331 final boolean primaryButtonStateChanged = 1332 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1333 final int action = event.getActionMasked(); 1334 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1335 && !primaryButtonStateChanged) { 1336 return true; 1337 } 1338 if (action == MotionEvent.ACTION_MOVE 1339 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1340 return true; 1341 } 1342 return false; 1343 } 1344 1345 void onTouchEvent(MotionEvent event) { 1346 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1347 mLastButtonState = event.getButtonState(); 1348 if (filterOutEvent) { 1349 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1350 mDiscardNextActionUp = true; 1351 } 1352 return; 1353 } 1354 updateTapState(event); 1355 updateFloatingToolbarVisibility(event); 1356 1357 if (hasSelectionController()) { 1358 getSelectionController().onTouchEvent(event); 1359 } 1360 1361 if (mShowSuggestionRunnable != null) { 1362 mTextView.removeCallbacks(mShowSuggestionRunnable); 1363 mShowSuggestionRunnable = null; 1364 } 1365 1366 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1367 mLastDownPositionX = event.getX(); 1368 mLastDownPositionY = event.getY(); 1369 1370 // Reset this state; it will be re-set if super.onTouchEvent 1371 // causes focus to move to the view. 1372 mTouchFocusSelected = false; 1373 mIgnoreActionUpEvent = false; 1374 } 1375 } 1376 1377 private void updateFloatingToolbarVisibility(MotionEvent event) { 1378 if (mTextActionMode != null) { 1379 switch (event.getActionMasked()) { 1380 case MotionEvent.ACTION_MOVE: 1381 hideFloatingToolbar(); 1382 break; 1383 case MotionEvent.ACTION_UP: // fall through 1384 case MotionEvent.ACTION_CANCEL: 1385 showFloatingToolbar(); 1386 } 1387 } 1388 } 1389 1390 private void hideFloatingToolbar() { 1391 if (mTextActionMode != null) { 1392 mTextView.removeCallbacks(mShowFloatingToolbar); 1393 mTextActionMode.hide(ActionMode.DEFAULT_HIDE_DURATION); 1394 } 1395 } 1396 1397 private void showFloatingToolbar() { 1398 if (mTextActionMode != null) { 1399 // Delay "show" so it doesn't interfere with click confirmations 1400 // or double-clicks that could "dismiss" the floating toolbar. 1401 int delay = ViewConfiguration.getDoubleTapTimeout(); 1402 mTextView.postDelayed(mShowFloatingToolbar, delay); 1403 } 1404 } 1405 1406 public void beginBatchEdit() { 1407 mInBatchEditControllers = true; 1408 final InputMethodState ims = mInputMethodState; 1409 if (ims != null) { 1410 int nesting = ++ims.mBatchEditNesting; 1411 if (nesting == 1) { 1412 ims.mCursorChanged = false; 1413 ims.mChangedDelta = 0; 1414 if (ims.mContentChanged) { 1415 // We already have a pending change from somewhere else, 1416 // so turn this into a full update. 1417 ims.mChangedStart = 0; 1418 ims.mChangedEnd = mTextView.getText().length(); 1419 } else { 1420 ims.mChangedStart = EXTRACT_UNKNOWN; 1421 ims.mChangedEnd = EXTRACT_UNKNOWN; 1422 ims.mContentChanged = false; 1423 } 1424 mUndoInputFilter.beginBatchEdit(); 1425 mTextView.onBeginBatchEdit(); 1426 } 1427 } 1428 } 1429 1430 public void endBatchEdit() { 1431 mInBatchEditControllers = false; 1432 final InputMethodState ims = mInputMethodState; 1433 if (ims != null) { 1434 int nesting = --ims.mBatchEditNesting; 1435 if (nesting == 0) { 1436 finishBatchEdit(ims); 1437 } 1438 } 1439 } 1440 1441 void ensureEndedBatchEdit() { 1442 final InputMethodState ims = mInputMethodState; 1443 if (ims != null && ims.mBatchEditNesting != 0) { 1444 ims.mBatchEditNesting = 0; 1445 finishBatchEdit(ims); 1446 } 1447 } 1448 1449 void finishBatchEdit(final InputMethodState ims) { 1450 mTextView.onEndBatchEdit(); 1451 mUndoInputFilter.endBatchEdit(); 1452 1453 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1454 mTextView.updateAfterEdit(); 1455 reportExtractedText(); 1456 } else if (ims.mCursorChanged) { 1457 // Cheesy way to get us to report the current cursor location. 1458 mTextView.invalidateCursor(); 1459 } 1460 // sendUpdateSelection knows to avoid sending if the selection did 1461 // not actually change. 1462 sendUpdateSelection(); 1463 1464 // Show drag handles if they were blocked by batch edit mode. 1465 if (mTextActionMode != null) { 1466 final CursorController cursorController = mTextView.hasSelection() 1467 ? getSelectionController() : getInsertionController(); 1468 if (cursorController != null && !cursorController.isActive() 1469 && !cursorController.isCursorBeingModified()) { 1470 cursorController.show(); 1471 } 1472 } 1473 } 1474 1475 static final int EXTRACT_NOTHING = -2; 1476 static final int EXTRACT_UNKNOWN = -1; 1477 1478 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1479 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1480 EXTRACT_UNKNOWN, outText); 1481 } 1482 1483 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1484 int partialStartOffset, int partialEndOffset, int delta, 1485 @Nullable ExtractedText outText) { 1486 if (request == null || outText == null) { 1487 return false; 1488 } 1489 1490 final CharSequence content = mTextView.getText(); 1491 if (content == null) { 1492 return false; 1493 } 1494 1495 if (partialStartOffset != EXTRACT_NOTHING) { 1496 final int N = content.length(); 1497 if (partialStartOffset < 0) { 1498 outText.partialStartOffset = outText.partialEndOffset = -1; 1499 partialStartOffset = 0; 1500 partialEndOffset = N; 1501 } else { 1502 // Now use the delta to determine the actual amount of text 1503 // we need. 1504 partialEndOffset += delta; 1505 // Adjust offsets to ensure we contain full spans. 1506 if (content instanceof Spanned) { 1507 Spanned spanned = (Spanned) content; 1508 Object[] spans = spanned.getSpans(partialStartOffset, 1509 partialEndOffset, ParcelableSpan.class); 1510 int i = spans.length; 1511 while (i > 0) { 1512 i--; 1513 int j = spanned.getSpanStart(spans[i]); 1514 if (j < partialStartOffset) partialStartOffset = j; 1515 j = spanned.getSpanEnd(spans[i]); 1516 if (j > partialEndOffset) partialEndOffset = j; 1517 } 1518 } 1519 outText.partialStartOffset = partialStartOffset; 1520 outText.partialEndOffset = partialEndOffset - delta; 1521 1522 if (partialStartOffset > N) { 1523 partialStartOffset = N; 1524 } else if (partialStartOffset < 0) { 1525 partialStartOffset = 0; 1526 } 1527 if (partialEndOffset > N) { 1528 partialEndOffset = N; 1529 } else if (partialEndOffset < 0) { 1530 partialEndOffset = 0; 1531 } 1532 } 1533 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1534 outText.text = content.subSequence(partialStartOffset, 1535 partialEndOffset); 1536 } else { 1537 outText.text = TextUtils.substring(content, partialStartOffset, 1538 partialEndOffset); 1539 } 1540 } else { 1541 outText.partialStartOffset = 0; 1542 outText.partialEndOffset = 0; 1543 outText.text = ""; 1544 } 1545 outText.flags = 0; 1546 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1547 outText.flags |= ExtractedText.FLAG_SELECTING; 1548 } 1549 if (mTextView.isSingleLine()) { 1550 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1551 } 1552 outText.startOffset = 0; 1553 outText.selectionStart = mTextView.getSelectionStart(); 1554 outText.selectionEnd = mTextView.getSelectionEnd(); 1555 return true; 1556 } 1557 1558 boolean reportExtractedText() { 1559 final Editor.InputMethodState ims = mInputMethodState; 1560 if (ims != null) { 1561 final boolean contentChanged = ims.mContentChanged; 1562 if (contentChanged || ims.mSelectionModeChanged) { 1563 ims.mContentChanged = false; 1564 ims.mSelectionModeChanged = false; 1565 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1566 if (req != null) { 1567 InputMethodManager imm = InputMethodManager.peekInstance(); 1568 if (imm != null) { 1569 if (TextView.DEBUG_EXTRACT) { 1570 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1571 + ims.mChangedStart 1572 + " end=" + ims.mChangedEnd 1573 + " delta=" + ims.mChangedDelta); 1574 } 1575 if (ims.mChangedStart < 0 && !contentChanged) { 1576 ims.mChangedStart = EXTRACT_NOTHING; 1577 } 1578 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1579 ims.mChangedDelta, ims.mExtractedText)) { 1580 if (TextView.DEBUG_EXTRACT) { 1581 Log.v(TextView.LOG_TAG, 1582 "Reporting extracted start=" 1583 + ims.mExtractedText.partialStartOffset 1584 + " end=" + ims.mExtractedText.partialEndOffset 1585 + ": " + ims.mExtractedText.text); 1586 } 1587 1588 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1589 ims.mChangedStart = EXTRACT_UNKNOWN; 1590 ims.mChangedEnd = EXTRACT_UNKNOWN; 1591 ims.mChangedDelta = 0; 1592 ims.mContentChanged = false; 1593 return true; 1594 } 1595 } 1596 } 1597 } 1598 } 1599 return false; 1600 } 1601 1602 private void sendUpdateSelection() { 1603 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1604 final InputMethodManager imm = InputMethodManager.peekInstance(); 1605 if (null != imm) { 1606 final int selectionStart = mTextView.getSelectionStart(); 1607 final int selectionEnd = mTextView.getSelectionEnd(); 1608 int candStart = -1; 1609 int candEnd = -1; 1610 if (mTextView.getText() instanceof Spannable) { 1611 final Spannable sp = (Spannable) mTextView.getText(); 1612 candStart = EditableInputConnection.getComposingSpanStart(sp); 1613 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1614 } 1615 // InputMethodManager#updateSelection skips sending the message if 1616 // none of the parameters have changed since the last time we called it. 1617 imm.updateSelection(mTextView, 1618 selectionStart, selectionEnd, candStart, candEnd); 1619 } 1620 } 1621 } 1622 1623 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1624 int cursorOffsetVertical) { 1625 final int selectionStart = mTextView.getSelectionStart(); 1626 final int selectionEnd = mTextView.getSelectionEnd(); 1627 1628 final InputMethodState ims = mInputMethodState; 1629 if (ims != null && ims.mBatchEditNesting == 0) { 1630 InputMethodManager imm = InputMethodManager.peekInstance(); 1631 if (imm != null) { 1632 if (imm.isActive(mTextView)) { 1633 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1634 // We are in extract mode and the content has changed 1635 // in some way... just report complete new text to the 1636 // input method. 1637 reportExtractedText(); 1638 } 1639 } 1640 } 1641 } 1642 1643 if (mCorrectionHighlighter != null) { 1644 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1645 } 1646 1647 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1648 drawCursor(canvas, cursorOffsetVertical); 1649 // Rely on the drawable entirely, do not draw the cursor line. 1650 // Has to be done after the IMM related code above which relies on the highlight. 1651 highlight = null; 1652 } 1653 1654 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1655 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1656 cursorOffsetVertical); 1657 } else { 1658 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1659 } 1660 } 1661 1662 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1663 Paint highlightPaint, int cursorOffsetVertical) { 1664 final long lineRange = layout.getLineRangeForDraw(canvas); 1665 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1666 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1667 if (lastLine < 0) return; 1668 1669 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1670 firstLine, lastLine); 1671 1672 if (layout instanceof DynamicLayout) { 1673 if (mTextRenderNodes == null) { 1674 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1675 } 1676 1677 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1678 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1679 int[] blockIndices = dynamicLayout.getBlockIndices(); 1680 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1681 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1682 1683 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1684 if (blockSet != null) { 1685 for (int i = 0; i < blockSet.size(); i++) { 1686 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1687 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1688 && mTextRenderNodes[blockIndex] != null) { 1689 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1690 } 1691 } 1692 } 1693 1694 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1695 if (startBlock < 0) { 1696 startBlock = -(startBlock + 1); 1697 } 1698 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1699 1700 int startIndexToFindAvailableRenderNode = 0; 1701 int lastIndex = numberOfBlocks; 1702 1703 for (int i = startBlock; i < numberOfBlocks; i++) { 1704 final int blockIndex = blockIndices[i]; 1705 if (i >= indexFirstChangedBlock 1706 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1707 && mTextRenderNodes[blockIndex] != null) { 1708 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1709 } 1710 if (blockEndLines[i] < firstLine) { 1711 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1712 // be redrawn after they get scrolled into drawing range. 1713 continue; 1714 } 1715 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1716 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1717 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1718 if (blockEndLines[i] >= lastLine) { 1719 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1720 break; 1721 } 1722 } 1723 if (blockSet != null) { 1724 for (int i = 0; i < blockSet.size(); i++) { 1725 final int block = blockSet.valueAt(i); 1726 final int blockIndex = dynamicLayout.getBlockIndex(block); 1727 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1728 || mTextRenderNodes[blockIndex] == null 1729 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1730 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1731 layout, highlight, highlightPaint, cursorOffsetVertical, 1732 blockEndLines, blockIndices, block, numberOfBlocks, 1733 startIndexToFindAvailableRenderNode); 1734 } 1735 } 1736 } 1737 1738 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1739 } else { 1740 // Boring layout is used for empty and hint text 1741 layout.drawText(canvas, firstLine, lastLine); 1742 } 1743 } 1744 1745 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1746 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1747 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1748 int startIndexToFindAvailableRenderNode) { 1749 final int blockEndLine = blockEndLines[blockInfoIndex]; 1750 int blockIndex = blockIndices[blockInfoIndex]; 1751 1752 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1753 if (blockIsInvalid) { 1754 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1755 startIndexToFindAvailableRenderNode); 1756 // Note how dynamic layout's internal block indices get updated from Editor 1757 blockIndices[blockInfoIndex] = blockIndex; 1758 if (mTextRenderNodes[blockIndex] != null) { 1759 mTextRenderNodes[blockIndex].isDirty = true; 1760 } 1761 startIndexToFindAvailableRenderNode = blockIndex + 1; 1762 } 1763 1764 if (mTextRenderNodes[blockIndex] == null) { 1765 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1766 } 1767 1768 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1769 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1770 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1771 final int blockBeginLine = blockInfoIndex == 0 ? 1772 0 : blockEndLines[blockInfoIndex - 1] + 1; 1773 final int top = layout.getLineTop(blockBeginLine); 1774 final int bottom = layout.getLineBottom(blockEndLine); 1775 int left = 0; 1776 int right = mTextView.getWidth(); 1777 if (mTextView.getHorizontallyScrolling()) { 1778 float min = Float.MAX_VALUE; 1779 float max = Float.MIN_VALUE; 1780 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1781 min = Math.min(min, layout.getLineLeft(line)); 1782 max = Math.max(max, layout.getLineRight(line)); 1783 } 1784 left = (int) min; 1785 right = (int) (max + 0.5f); 1786 } 1787 1788 // Rebuild display list if it is invalid 1789 if (blockDisplayListIsInvalid) { 1790 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1791 right - left, bottom - top); 1792 try { 1793 // drawText is always relative to TextView's origin, this translation 1794 // brings this range of text back to the top left corner of the viewport 1795 displayListCanvas.translate(-left, -top); 1796 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1797 mTextRenderNodes[blockIndex].isDirty = false; 1798 // No need to untranslate, previous context is popped after 1799 // drawDisplayList 1800 } finally { 1801 blockDisplayList.end(displayListCanvas); 1802 // Same as drawDisplayList below, handled by our TextView's parent 1803 blockDisplayList.setClipToBounds(false); 1804 } 1805 } 1806 1807 // Valid display list only needs to update its drawing location. 1808 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1809 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1810 } 1811 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1812 return startIndexToFindAvailableRenderNode; 1813 } 1814 1815 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1816 int searchStartIndex) { 1817 int length = mTextRenderNodes.length; 1818 for (int i = searchStartIndex; i < length; i++) { 1819 boolean blockIndexFound = false; 1820 for (int j = 0; j < numberOfBlocks; j++) { 1821 if (blockIndices[j] == i) { 1822 blockIndexFound = true; 1823 break; 1824 } 1825 } 1826 if (blockIndexFound) continue; 1827 return i; 1828 } 1829 1830 // No available index found, the pool has to grow 1831 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1832 return length; 1833 } 1834 1835 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1836 final boolean translate = cursorOffsetVertical != 0; 1837 if (translate) canvas.translate(0, cursorOffsetVertical); 1838 for (int i = 0; i < mCursorCount; i++) { 1839 mCursorDrawable[i].draw(canvas); 1840 } 1841 if (translate) canvas.translate(0, -cursorOffsetVertical); 1842 } 1843 1844 void invalidateHandlesAndActionMode() { 1845 if (mSelectionModifierCursorController != null) { 1846 mSelectionModifierCursorController.invalidateHandles(); 1847 } 1848 if (mInsertionPointCursorController != null) { 1849 mInsertionPointCursorController.invalidateHandle(); 1850 } 1851 if (mTextActionMode != null) { 1852 invalidateActionModeAsync(); 1853 } 1854 } 1855 1856 /** 1857 * Invalidates all the sub-display lists that overlap the specified character range 1858 */ 1859 void invalidateTextDisplayList(Layout layout, int start, int end) { 1860 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1861 final int firstLine = layout.getLineForOffset(start); 1862 final int lastLine = layout.getLineForOffset(end); 1863 1864 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1865 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1866 int[] blockIndices = dynamicLayout.getBlockIndices(); 1867 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1868 1869 int i = 0; 1870 // Skip the blocks before firstLine 1871 while (i < numberOfBlocks) { 1872 if (blockEndLines[i] >= firstLine) break; 1873 i++; 1874 } 1875 1876 // Invalidate all subsequent blocks until lastLine is passed 1877 while (i < numberOfBlocks) { 1878 final int blockIndex = blockIndices[i]; 1879 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1880 mTextRenderNodes[blockIndex].isDirty = true; 1881 } 1882 if (blockEndLines[i] >= lastLine) break; 1883 i++; 1884 } 1885 } 1886 } 1887 1888 void invalidateTextDisplayList() { 1889 if (mTextRenderNodes != null) { 1890 for (int i = 0; i < mTextRenderNodes.length; i++) { 1891 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1892 } 1893 } 1894 } 1895 1896 void updateCursorsPositions() { 1897 if (mTextView.mCursorDrawableRes == 0) { 1898 mCursorCount = 0; 1899 return; 1900 } 1901 1902 Layout layout = mTextView.getLayout(); 1903 final int offset = mTextView.getSelectionStart(); 1904 final int line = layout.getLineForOffset(offset); 1905 final int top = layout.getLineTop(line); 1906 final int bottom = layout.getLineTop(line + 1); 1907 1908 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1909 1910 int middle = bottom; 1911 if (mCursorCount == 2) { 1912 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1913 middle = (top + bottom) >> 1; 1914 } 1915 1916 boolean clamped = layout.shouldClampCursor(line); 1917 updateCursorPosition(0, top, middle, layout.getPrimaryHorizontal(offset, clamped, true)); 1918 1919 if (mCursorCount == 2) { 1920 updateCursorPosition(1, middle, bottom, 1921 layout.getSecondaryHorizontal(offset, clamped, true)); 1922 } 1923 } 1924 1925 void refreshTextActionMode() { 1926 if (extractedTextModeWillBeStarted()) { 1927 mRestartActionModeOnNextRefresh = false; 1928 return; 1929 } 1930 final boolean hasSelection = mTextView.hasSelection(); 1931 final SelectionModifierCursorController selectionController = getSelectionController(); 1932 final InsertionPointCursorController insertionController = getInsertionController(); 1933 if ((selectionController != null && selectionController.isCursorBeingModified()) 1934 || (insertionController != null && insertionController.isCursorBeingModified())) { 1935 // ActionMode should be managed by the currently active cursor controller. 1936 mRestartActionModeOnNextRefresh = false; 1937 return; 1938 } 1939 if (hasSelection) { 1940 hideInsertionPointCursorController(); 1941 if (mTextActionMode == null) { 1942 if (mRestartActionModeOnNextRefresh) { 1943 // To avoid distraction, newly start action mode only when selection action 1944 // mode is being restarted. 1945 startSelectionActionMode(); 1946 } 1947 } else if (selectionController == null || !selectionController.isActive()) { 1948 // Insertion action mode is active. Avoid dismissing the selection. 1949 stopTextActionModeWithPreservingSelection(); 1950 startSelectionActionMode(); 1951 } else { 1952 mTextActionMode.invalidateContentRect(); 1953 } 1954 } else { 1955 // Insertion action mode is started only when insertion controller is explicitly 1956 // activated. 1957 if (insertionController == null || !insertionController.isActive()) { 1958 stopTextActionMode(); 1959 } else if (mTextActionMode != null) { 1960 mTextActionMode.invalidateContentRect(); 1961 } 1962 } 1963 mRestartActionModeOnNextRefresh = false; 1964 } 1965 1966 /** 1967 * Start an Insertion action mode. 1968 */ 1969 void startInsertionActionMode() { 1970 if (mInsertionActionModeRunnable != null) { 1971 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1972 } 1973 if (extractedTextModeWillBeStarted()) { 1974 return; 1975 } 1976 stopTextActionMode(); 1977 1978 ActionMode.Callback actionModeCallback = 1979 new TextActionModeCallback(false /* hasSelection */); 1980 mTextActionMode = mTextView.startActionMode( 1981 actionModeCallback, ActionMode.TYPE_FLOATING); 1982 if (mTextActionMode != null && getInsertionController() != null) { 1983 getInsertionController().show(); 1984 } 1985 } 1986 1987 @NonNull 1988 TextView getTextView() { 1989 return mTextView; 1990 } 1991 1992 @Nullable 1993 ActionMode getTextActionMode() { 1994 return mTextActionMode; 1995 } 1996 1997 void setRestartActionModeOnNextRefresh(boolean value) { 1998 mRestartActionModeOnNextRefresh = value; 1999 } 2000 2001 /** 2002 * Asynchronously starts a selection action mode using the TextClassifier. 2003 */ 2004 void startSelectionActionModeAsync() { 2005 getSelectionActionModeHelper().startActionModeAsync(); 2006 } 2007 2008 /** 2009 * Synchronously starts a selection action mode without the TextClassifier. 2010 */ 2011 void startSelectionActionMode() { 2012 getSelectionActionModeHelper().startActionMode(); 2013 } 2014 2015 /** 2016 * Asynchronously invalidates an action mode using the TextClassifier. 2017 */ 2018 private void invalidateActionModeAsync() { 2019 getSelectionActionModeHelper().invalidateActionModeAsync(); 2020 } 2021 2022 private SelectionActionModeHelper getSelectionActionModeHelper() { 2023 if (mSelectionActionModeHelper == null) { 2024 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2025 } 2026 return mSelectionActionModeHelper; 2027 } 2028 2029 /** 2030 * If the TextView allows text selection, selects the current word when no existing selection 2031 * was available and starts a drag. 2032 * 2033 * @return true if the drag was started. 2034 */ 2035 private boolean selectCurrentWordAndStartDrag() { 2036 if (mInsertionActionModeRunnable != null) { 2037 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2038 } 2039 if (extractedTextModeWillBeStarted()) { 2040 return false; 2041 } 2042 if (!checkField()) { 2043 return false; 2044 } 2045 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2046 // No selection and cannot select a word. 2047 return false; 2048 } 2049 stopTextActionModeWithPreservingSelection(); 2050 getSelectionController().enterDrag( 2051 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2052 return true; 2053 } 2054 2055 /** 2056 * Checks whether a selection can be performed on the current TextView. 2057 * 2058 * @return true if a selection can be performed 2059 */ 2060 boolean checkField() { 2061 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2062 Log.w(TextView.LOG_TAG, 2063 "TextView does not support text selection. Selection cancelled."); 2064 return false; 2065 } 2066 return true; 2067 } 2068 2069 boolean startSelectionActionModeInternal() { 2070 if (extractedTextModeWillBeStarted()) { 2071 return false; 2072 } 2073 if (mTextActionMode != null) { 2074 // Text action mode is already started 2075 invalidateActionModeAsync(); 2076 return false; 2077 } 2078 2079 if (!checkField() || !mTextView.hasSelection()) { 2080 return false; 2081 } 2082 2083 ActionMode.Callback actionModeCallback = 2084 new TextActionModeCallback(true /* hasSelection */); 2085 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2086 2087 final boolean selectionStarted = mTextActionMode != null; 2088 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2089 // Show the IME to be able to replace text, except when selecting non editable text. 2090 final InputMethodManager imm = InputMethodManager.peekInstance(); 2091 if (imm != null) { 2092 imm.showSoftInput(mTextView, 0, null); 2093 } 2094 } 2095 return selectionStarted; 2096 } 2097 2098 private boolean extractedTextModeWillBeStarted() { 2099 if (!(mTextView.isInExtractedMode())) { 2100 final InputMethodManager imm = InputMethodManager.peekInstance(); 2101 return imm != null && imm.isFullscreenMode(); 2102 } 2103 return false; 2104 } 2105 2106 /** 2107 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2108 * the current cursor position or selection range. This method is consistent with the 2109 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2110 */ 2111 private boolean shouldOfferToShowSuggestions() { 2112 CharSequence text = mTextView.getText(); 2113 if (!(text instanceof Spannable)) return false; 2114 2115 final Spannable spannable = (Spannable) text; 2116 final int selectionStart = mTextView.getSelectionStart(); 2117 final int selectionEnd = mTextView.getSelectionEnd(); 2118 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2119 SuggestionSpan.class); 2120 if (suggestionSpans.length == 0) { 2121 return false; 2122 } 2123 if (selectionStart == selectionEnd) { 2124 // Spans overlap the cursor. 2125 for (int i = 0; i < suggestionSpans.length; i++) { 2126 if (suggestionSpans[i].getSuggestions().length > 0) { 2127 return true; 2128 } 2129 } 2130 return false; 2131 } 2132 int minSpanStart = mTextView.getText().length(); 2133 int maxSpanEnd = 0; 2134 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2135 int unionOfSpansCoveringSelectionStartEnd = 0; 2136 boolean hasValidSuggestions = false; 2137 for (int i = 0; i < suggestionSpans.length; i++) { 2138 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2139 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2140 minSpanStart = Math.min(minSpanStart, spanStart); 2141 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2142 if (selectionStart < spanStart || selectionStart > spanEnd) { 2143 // The span doesn't cover the current selection start point. 2144 continue; 2145 } 2146 hasValidSuggestions = 2147 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2148 unionOfSpansCoveringSelectionStartStart = 2149 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2150 unionOfSpansCoveringSelectionStartEnd = 2151 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2152 } 2153 if (!hasValidSuggestions) { 2154 return false; 2155 } 2156 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2157 // No spans cover the selection start point. 2158 return false; 2159 } 2160 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2161 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2162 // There is a span that is not covered by the union. In this case, we soouldn't offer 2163 // to show suggestions as it's confusing. 2164 return false; 2165 } 2166 return true; 2167 } 2168 2169 /** 2170 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2171 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2172 */ 2173 private boolean isCursorInsideEasyCorrectionSpan() { 2174 Spannable spannable = (Spannable) mTextView.getText(); 2175 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2176 mTextView.getSelectionEnd(), SuggestionSpan.class); 2177 for (int i = 0; i < suggestionSpans.length; i++) { 2178 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2179 return true; 2180 } 2181 } 2182 return false; 2183 } 2184 2185 void onTouchUpEvent(MotionEvent event) { 2186 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2187 hideCursorAndSpanControllers(); 2188 stopTextActionMode(); 2189 CharSequence text = mTextView.getText(); 2190 if (!selectAllGotFocus && text.length() > 0) { 2191 // Move cursor 2192 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2193 Selection.setSelection((Spannable) text, offset); 2194 if (mSpellChecker != null) { 2195 // When the cursor moves, the word that was typed may need spell check 2196 mSpellChecker.onSelectionChanged(); 2197 } 2198 2199 if (!extractedTextModeWillBeStarted()) { 2200 if (isCursorInsideEasyCorrectionSpan()) { 2201 // Cancel the single tap delayed runnable. 2202 if (mInsertionActionModeRunnable != null) { 2203 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2204 } 2205 2206 mShowSuggestionRunnable = new Runnable() { 2207 public void run() { 2208 replace(); 2209 } 2210 }; 2211 // removeCallbacks is performed on every touch 2212 mTextView.postDelayed(mShowSuggestionRunnable, 2213 ViewConfiguration.getDoubleTapTimeout()); 2214 } else if (hasInsertionController()) { 2215 getInsertionController().show(); 2216 } 2217 } 2218 } 2219 } 2220 2221 protected void stopTextActionMode() { 2222 if (mTextActionMode != null) { 2223 // This will hide the mSelectionModifierCursorController 2224 mTextActionMode.finish(); 2225 } 2226 } 2227 2228 private void stopTextActionModeWithPreservingSelection() { 2229 if (mTextActionMode != null) { 2230 mRestartActionModeOnNextRefresh = true; 2231 } 2232 mPreserveSelection = true; 2233 stopTextActionMode(); 2234 mPreserveSelection = false; 2235 } 2236 2237 /** 2238 * @return True if this view supports insertion handles. 2239 */ 2240 boolean hasInsertionController() { 2241 return mInsertionControllerEnabled; 2242 } 2243 2244 /** 2245 * @return True if this view supports selection handles. 2246 */ 2247 boolean hasSelectionController() { 2248 return mSelectionControllerEnabled; 2249 } 2250 2251 private InsertionPointCursorController getInsertionController() { 2252 if (!mInsertionControllerEnabled) { 2253 return null; 2254 } 2255 2256 if (mInsertionPointCursorController == null) { 2257 mInsertionPointCursorController = new InsertionPointCursorController(); 2258 2259 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2260 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2261 } 2262 2263 return mInsertionPointCursorController; 2264 } 2265 2266 @Nullable 2267 SelectionModifierCursorController getSelectionController() { 2268 if (!mSelectionControllerEnabled) { 2269 return null; 2270 } 2271 2272 if (mSelectionModifierCursorController == null) { 2273 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2274 2275 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2276 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2277 } 2278 2279 return mSelectionModifierCursorController; 2280 } 2281 2282 @VisibleForTesting 2283 public Drawable[] getCursorDrawable() { 2284 return mCursorDrawable; 2285 } 2286 2287 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2288 if (mCursorDrawable[cursorIndex] == null) { 2289 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2290 mTextView.mCursorDrawableRes); 2291 } 2292 final Drawable drawable = mCursorDrawable[cursorIndex]; 2293 final int left = clampHorizontalPosition(drawable, horizontal); 2294 final int width = drawable.getIntrinsicWidth(); 2295 drawable.setBounds(left, top - mTempRect.top, left + width, 2296 bottom + mTempRect.bottom); 2297 } 2298 2299 /** 2300 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2301 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2302 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2303 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2304 * of the view. 2305 * 2306 * @param drawable Drawable. Can be null. 2307 * @param horizontal Horizontal position for the drawable. 2308 * @return The clamped horizontal position for the drawable. 2309 */ 2310 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2311 horizontal = Math.max(0.5f, horizontal - 0.5f); 2312 if (mTempRect == null) mTempRect = new Rect(); 2313 2314 int drawableWidth = 0; 2315 if (drawable != null) { 2316 drawable.getPadding(mTempRect); 2317 drawableWidth = drawable.getIntrinsicWidth(); 2318 } else { 2319 mTempRect.setEmpty(); 2320 } 2321 2322 int scrollX = mTextView.getScrollX(); 2323 float horizontalDiff = horizontal - scrollX; 2324 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2325 - mTextView.getCompoundPaddingRight(); 2326 2327 final int left; 2328 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2329 // at the rightmost position 2330 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2331 } else if (Math.abs(horizontalDiff) <= 1f 2332 || (TextUtils.isEmpty(mTextView.getText()) 2333 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2334 && horizontal <= 1f)) { 2335 // at the leftmost position 2336 left = scrollX - mTempRect.left; 2337 } else { 2338 left = (int) horizontal - mTempRect.left; 2339 } 2340 return left; 2341 } 2342 2343 /** 2344 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2345 * a dictionary) from the current input method, provided by it calling 2346 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2347 * implementation flashes the background of the corrected word to provide feedback to the user. 2348 * 2349 * @param info The auto correct info about the text that was corrected. 2350 */ 2351 public void onCommitCorrection(CorrectionInfo info) { 2352 if (mCorrectionHighlighter == null) { 2353 mCorrectionHighlighter = new CorrectionHighlighter(); 2354 } else { 2355 mCorrectionHighlighter.invalidate(false); 2356 } 2357 2358 mCorrectionHighlighter.highlight(info); 2359 mUndoInputFilter.freezeLastEdit(); 2360 } 2361 2362 void onScrollChanged() { 2363 if (mPositionListener != null) { 2364 mPositionListener.onScrollChanged(); 2365 } 2366 if (mTextActionMode != null) { 2367 mTextActionMode.invalidateContentRect(); 2368 } 2369 } 2370 2371 /** 2372 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2373 */ 2374 private boolean shouldBlink() { 2375 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2376 2377 final int start = mTextView.getSelectionStart(); 2378 if (start < 0) return false; 2379 2380 final int end = mTextView.getSelectionEnd(); 2381 if (end < 0) return false; 2382 2383 return start == end; 2384 } 2385 2386 void makeBlink() { 2387 if (shouldBlink()) { 2388 mShowCursor = SystemClock.uptimeMillis(); 2389 if (mBlink == null) mBlink = new Blink(); 2390 mTextView.removeCallbacks(mBlink); 2391 mTextView.postDelayed(mBlink, BLINK); 2392 } else { 2393 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2394 } 2395 } 2396 2397 private class Blink implements Runnable { 2398 private boolean mCancelled; 2399 2400 public void run() { 2401 if (mCancelled) { 2402 return; 2403 } 2404 2405 mTextView.removeCallbacks(this); 2406 2407 if (shouldBlink()) { 2408 if (mTextView.getLayout() != null) { 2409 mTextView.invalidateCursorPath(); 2410 } 2411 2412 mTextView.postDelayed(this, BLINK); 2413 } 2414 } 2415 2416 void cancel() { 2417 if (!mCancelled) { 2418 mTextView.removeCallbacks(this); 2419 mCancelled = true; 2420 } 2421 } 2422 2423 void uncancel() { 2424 mCancelled = false; 2425 } 2426 } 2427 2428 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2429 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2430 com.android.internal.R.layout.text_drag_thumbnail, null); 2431 2432 if (shadowView == null) { 2433 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2434 } 2435 2436 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2437 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2438 end = TextUtils.unpackRangeEndFromLong(range); 2439 } 2440 final CharSequence text = mTextView.getTransformedText(start, end); 2441 shadowView.setText(text); 2442 shadowView.setTextColor(mTextView.getTextColors()); 2443 2444 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2445 shadowView.setGravity(Gravity.CENTER); 2446 2447 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2448 ViewGroup.LayoutParams.WRAP_CONTENT)); 2449 2450 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2451 shadowView.measure(size, size); 2452 2453 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2454 shadowView.invalidate(); 2455 return new DragShadowBuilder(shadowView); 2456 } 2457 2458 private static class DragLocalState { 2459 public TextView sourceTextView; 2460 public int start, end; 2461 2462 public DragLocalState(TextView sourceTextView, int start, int end) { 2463 this.sourceTextView = sourceTextView; 2464 this.start = start; 2465 this.end = end; 2466 } 2467 } 2468 2469 void onDrop(DragEvent event) { 2470 SpannableStringBuilder content = new SpannableStringBuilder(); 2471 2472 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2473 if (permissions != null) { 2474 permissions.takeTransient(); 2475 } 2476 2477 try { 2478 ClipData clipData = event.getClipData(); 2479 final int itemCount = clipData.getItemCount(); 2480 for (int i = 0; i < itemCount; i++) { 2481 Item item = clipData.getItemAt(i); 2482 content.append(item.coerceToStyledText(mTextView.getContext())); 2483 } 2484 } finally { 2485 if (permissions != null) { 2486 permissions.release(); 2487 } 2488 } 2489 2490 mTextView.beginBatchEdit(); 2491 mUndoInputFilter.freezeLastEdit(); 2492 try { 2493 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2494 Object localState = event.getLocalState(); 2495 DragLocalState dragLocalState = null; 2496 if (localState instanceof DragLocalState) { 2497 dragLocalState = (DragLocalState) localState; 2498 } 2499 boolean dragDropIntoItself = dragLocalState != null 2500 && dragLocalState.sourceTextView == mTextView; 2501 2502 if (dragDropIntoItself) { 2503 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2504 // A drop inside the original selection discards the drop. 2505 return; 2506 } 2507 } 2508 2509 final int originalLength = mTextView.getText().length(); 2510 int min = offset; 2511 int max = offset; 2512 2513 Selection.setSelection((Spannable) mTextView.getText(), max); 2514 mTextView.replaceText_internal(min, max, content); 2515 2516 if (dragDropIntoItself) { 2517 int dragSourceStart = dragLocalState.start; 2518 int dragSourceEnd = dragLocalState.end; 2519 if (max <= dragSourceStart) { 2520 // Inserting text before selection has shifted positions 2521 final int shift = mTextView.getText().length() - originalLength; 2522 dragSourceStart += shift; 2523 dragSourceEnd += shift; 2524 } 2525 2526 // Delete original selection 2527 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2528 2529 // Make sure we do not leave two adjacent spaces. 2530 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2531 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2532 if (nextCharIdx > prevCharIdx + 1) { 2533 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2534 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2535 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2536 } 2537 } 2538 } 2539 } finally { 2540 mTextView.endBatchEdit(); 2541 mUndoInputFilter.freezeLastEdit(); 2542 } 2543 } 2544 2545 public void addSpanWatchers(Spannable text) { 2546 final int textLength = text.length(); 2547 2548 if (mKeyListener != null) { 2549 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2550 } 2551 2552 if (mSpanController == null) { 2553 mSpanController = new SpanController(); 2554 } 2555 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2556 } 2557 2558 void setContextMenuAnchor(float x, float y) { 2559 mContextMenuAnchorX = x; 2560 mContextMenuAnchorY = y; 2561 } 2562 2563 void onCreateContextMenu(ContextMenu menu) { 2564 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2565 || Float.isNaN(mContextMenuAnchorY)) { 2566 return; 2567 } 2568 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2569 if (offset == -1) { 2570 return; 2571 } 2572 stopTextActionModeWithPreservingSelection(); 2573 final boolean isOnSelection = mTextView.hasSelection() 2574 && offset >= mTextView.getSelectionStart() && offset <= mTextView.getSelectionEnd(); 2575 if (!isOnSelection) { 2576 // Right clicked position is not on the selection. Remove the selection and move the 2577 // cursor to the right clicked position. 2578 Selection.setSelection((Spannable) mTextView.getText(), offset); 2579 stopTextActionMode(); 2580 } 2581 2582 if (shouldOfferToShowSuggestions()) { 2583 final SuggestionInfo[] suggestionInfoArray = 2584 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2585 for (int i = 0; i < suggestionInfoArray.length; i++) { 2586 suggestionInfoArray[i] = new SuggestionInfo(); 2587 } 2588 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2589 com.android.internal.R.string.replace); 2590 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2591 for (int i = 0; i < numItems; i++) { 2592 final SuggestionInfo info = suggestionInfoArray[i]; 2593 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2594 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2595 @Override 2596 public boolean onMenuItemClick(MenuItem item) { 2597 replaceWithSuggestion(info); 2598 return true; 2599 } 2600 }); 2601 } 2602 } 2603 2604 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2605 com.android.internal.R.string.undo) 2606 .setAlphabeticShortcut('z') 2607 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2608 .setEnabled(mTextView.canUndo()); 2609 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2610 com.android.internal.R.string.redo) 2611 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2612 .setEnabled(mTextView.canRedo()); 2613 2614 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2615 com.android.internal.R.string.cut) 2616 .setAlphabeticShortcut('x') 2617 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2618 .setEnabled(mTextView.canCut()); 2619 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2620 com.android.internal.R.string.copy) 2621 .setAlphabeticShortcut('c') 2622 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2623 .setEnabled(mTextView.canCopy()); 2624 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2625 com.android.internal.R.string.paste) 2626 .setAlphabeticShortcut('v') 2627 .setEnabled(mTextView.canPaste()) 2628 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2629 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2630 com.android.internal.R.string.paste_as_plain_text) 2631 .setEnabled(mTextView.canPaste()) 2632 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2633 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2634 com.android.internal.R.string.share) 2635 .setEnabled(mTextView.canShare()) 2636 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2637 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2638 com.android.internal.R.string.selectAll) 2639 .setAlphabeticShortcut('a') 2640 .setEnabled(mTextView.canSelectAllText()) 2641 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2642 2643 mPreserveSelection = true; 2644 } 2645 2646 @Nullable 2647 private SuggestionSpan findEquivalentSuggestionSpan( 2648 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2649 final Editable editable = (Editable) mTextView.getText(); 2650 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2651 // Exactly same span is found. 2652 return suggestionSpanInfo.mSuggestionSpan; 2653 } 2654 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2655 // contents. 2656 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2657 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2658 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2659 final int start = editable.getSpanStart(suggestionSpan); 2660 if (start != suggestionSpanInfo.mSpanStart) { 2661 continue; 2662 } 2663 final int end = editable.getSpanEnd(suggestionSpan); 2664 if (end != suggestionSpanInfo.mSpanEnd) { 2665 continue; 2666 } 2667 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2668 return suggestionSpan; 2669 } 2670 } 2671 return null; 2672 } 2673 2674 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2675 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2676 suggestionInfo.mSuggestionSpanInfo); 2677 if (targetSuggestionSpan == null) { 2678 // Span has been removed 2679 return; 2680 } 2681 final Editable editable = (Editable) mTextView.getText(); 2682 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2683 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2684 if (spanStart < 0 || spanEnd <= spanStart) { 2685 // Span has been removed 2686 return; 2687 } 2688 2689 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2690 // SuggestionSpans are removed by replace: save them before 2691 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2692 SuggestionSpan.class); 2693 final int length = suggestionSpans.length; 2694 int[] suggestionSpansStarts = new int[length]; 2695 int[] suggestionSpansEnds = new int[length]; 2696 int[] suggestionSpansFlags = new int[length]; 2697 for (int i = 0; i < length; i++) { 2698 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2699 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2700 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2701 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2702 2703 // Remove potential misspelled flags 2704 int suggestionSpanFlags = suggestionSpan.getFlags(); 2705 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2706 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2707 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2708 suggestionSpan.setFlags(suggestionSpanFlags); 2709 } 2710 } 2711 2712 // Notify source IME of the suggestion pick. Do this before swapping texts. 2713 targetSuggestionSpan.notifySelection( 2714 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2715 2716 // Swap text content between actual text and Suggestion span 2717 final int suggestionStart = suggestionInfo.mSuggestionStart; 2718 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2719 final String suggestion = suggestionInfo.mText.subSequence( 2720 suggestionStart, suggestionEnd).toString(); 2721 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2722 2723 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2724 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2725 2726 // Restore previous SuggestionSpans 2727 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2728 for (int i = 0; i < length; i++) { 2729 // Only spans that include the modified region make sense after replacement 2730 // Spans partially included in the replaced region are removed, there is no 2731 // way to assign them a valid range after replacement 2732 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2733 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2734 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2735 } 2736 } 2737 // Move cursor at the end of the replaced word 2738 final int newCursorPosition = spanEnd + lengthDelta; 2739 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2740 } 2741 2742 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2743 new MenuItem.OnMenuItemClickListener() { 2744 @Override 2745 public boolean onMenuItemClick(MenuItem item) { 2746 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2747 return true; 2748 } 2749 return mTextView.onTextContextMenuItem(item.getItemId()); 2750 } 2751 }; 2752 2753 /** 2754 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2755 * pop-up should be displayed. 2756 * Also monitors {@link Selection} to call back to the attached input method. 2757 */ 2758 private class SpanController implements SpanWatcher { 2759 2760 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2761 2762 private EasyEditPopupWindow mPopupWindow; 2763 2764 private Runnable mHidePopup; 2765 2766 // This function is pure but inner classes can't have static functions 2767 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2768 final Object span) { 2769 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2770 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2771 } 2772 2773 @Override 2774 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2775 if (isNonIntermediateSelectionSpan(text, span)) { 2776 sendUpdateSelection(); 2777 } else if (span instanceof EasyEditSpan) { 2778 if (mPopupWindow == null) { 2779 mPopupWindow = new EasyEditPopupWindow(); 2780 mHidePopup = new Runnable() { 2781 @Override 2782 public void run() { 2783 hide(); 2784 } 2785 }; 2786 } 2787 2788 // Make sure there is only at most one EasyEditSpan in the text 2789 if (mPopupWindow.mEasyEditSpan != null) { 2790 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2791 } 2792 2793 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2794 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2795 @Override 2796 public void onDeleteClick(EasyEditSpan span) { 2797 Editable editable = (Editable) mTextView.getText(); 2798 int start = editable.getSpanStart(span); 2799 int end = editable.getSpanEnd(span); 2800 if (start >= 0 && end >= 0) { 2801 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2802 mTextView.deleteText_internal(start, end); 2803 } 2804 editable.removeSpan(span); 2805 } 2806 }); 2807 2808 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2809 // The window is not visible yet, ignore the text change. 2810 return; 2811 } 2812 2813 if (mTextView.getLayout() == null) { 2814 // The view has not been laid out yet, ignore the text change 2815 return; 2816 } 2817 2818 if (extractedTextModeWillBeStarted()) { 2819 // The input is in extract mode. Do not handle the easy edit in 2820 // the original TextView, as the ExtractEditText will do 2821 return; 2822 } 2823 2824 mPopupWindow.show(); 2825 mTextView.removeCallbacks(mHidePopup); 2826 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2827 } 2828 } 2829 2830 @Override 2831 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2832 if (isNonIntermediateSelectionSpan(text, span)) { 2833 sendUpdateSelection(); 2834 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2835 hide(); 2836 } 2837 } 2838 2839 @Override 2840 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2841 int newStart, int newEnd) { 2842 if (isNonIntermediateSelectionSpan(text, span)) { 2843 sendUpdateSelection(); 2844 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2845 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2846 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2847 text.removeSpan(easyEditSpan); 2848 } 2849 } 2850 2851 public void hide() { 2852 if (mPopupWindow != null) { 2853 mPopupWindow.hide(); 2854 mTextView.removeCallbacks(mHidePopup); 2855 } 2856 } 2857 2858 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2859 try { 2860 PendingIntent pendingIntent = span.getPendingIntent(); 2861 if (pendingIntent != null) { 2862 Intent intent = new Intent(); 2863 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2864 pendingIntent.send(mTextView.getContext(), 0, intent); 2865 } 2866 } catch (CanceledException e) { 2867 // This should not happen, as we should try to send the intent only once. 2868 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2869 } 2870 } 2871 } 2872 2873 /** 2874 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2875 */ 2876 private interface EasyEditDeleteListener { 2877 2878 /** 2879 * Clicks the delete pop-up. 2880 */ 2881 void onDeleteClick(EasyEditSpan span); 2882 } 2883 2884 /** 2885 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2886 * by {@link SpanController}. 2887 */ 2888 private class EasyEditPopupWindow extends PinnedPopupWindow 2889 implements OnClickListener { 2890 private static final int POPUP_TEXT_LAYOUT = 2891 com.android.internal.R.layout.text_edit_action_popup_text; 2892 private TextView mDeleteTextView; 2893 private EasyEditSpan mEasyEditSpan; 2894 private EasyEditDeleteListener mOnDeleteListener; 2895 2896 @Override 2897 protected void createPopupWindow() { 2898 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2899 com.android.internal.R.attr.textSelectHandleWindowStyle); 2900 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2901 mPopupWindow.setClippingEnabled(true); 2902 } 2903 2904 @Override 2905 protected void initContentView() { 2906 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2907 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2908 mContentView = linearLayout; 2909 mContentView.setBackgroundResource( 2910 com.android.internal.R.drawable.text_edit_side_paste_window); 2911 2912 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 2913 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2914 2915 LayoutParams wrapContent = new LayoutParams( 2916 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2917 2918 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2919 mDeleteTextView.setLayoutParams(wrapContent); 2920 mDeleteTextView.setText(com.android.internal.R.string.delete); 2921 mDeleteTextView.setOnClickListener(this); 2922 mContentView.addView(mDeleteTextView); 2923 } 2924 2925 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2926 mEasyEditSpan = easyEditSpan; 2927 } 2928 2929 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2930 mOnDeleteListener = listener; 2931 } 2932 2933 @Override 2934 public void onClick(View view) { 2935 if (view == mDeleteTextView 2936 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2937 && mOnDeleteListener != null) { 2938 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2939 } 2940 } 2941 2942 @Override 2943 public void hide() { 2944 if (mEasyEditSpan != null) { 2945 mEasyEditSpan.setDeleteEnabled(false); 2946 } 2947 mOnDeleteListener = null; 2948 super.hide(); 2949 } 2950 2951 @Override 2952 protected int getTextOffset() { 2953 // Place the pop-up at the end of the span 2954 Editable editable = (Editable) mTextView.getText(); 2955 return editable.getSpanEnd(mEasyEditSpan); 2956 } 2957 2958 @Override 2959 protected int getVerticalLocalPosition(int line) { 2960 return mTextView.getLayout().getLineBottom(line); 2961 } 2962 2963 @Override 2964 protected int clipVertically(int positionY) { 2965 // As we display the pop-up below the span, no vertical clipping is required. 2966 return positionY; 2967 } 2968 } 2969 2970 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2971 // 3 handles 2972 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2973 // 1 CursorAnchorInfoNotifier 2974 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2975 private TextViewPositionListener[] mPositionListeners = 2976 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2977 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2978 private boolean mPositionHasChanged = true; 2979 // Absolute position of the TextView with respect to its parent window 2980 private int mPositionX, mPositionY; 2981 private int mPositionXOnScreen, mPositionYOnScreen; 2982 private int mNumberOfListeners; 2983 private boolean mScrollHasChanged; 2984 final int[] mTempCoords = new int[2]; 2985 2986 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2987 if (mNumberOfListeners == 0) { 2988 updatePosition(); 2989 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2990 vto.addOnPreDrawListener(this); 2991 } 2992 2993 int emptySlotIndex = -1; 2994 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2995 TextViewPositionListener listener = mPositionListeners[i]; 2996 if (listener == positionListener) { 2997 return; 2998 } else if (emptySlotIndex < 0 && listener == null) { 2999 emptySlotIndex = i; 3000 } 3001 } 3002 3003 mPositionListeners[emptySlotIndex] = positionListener; 3004 mCanMove[emptySlotIndex] = canMove; 3005 mNumberOfListeners++; 3006 } 3007 3008 public void removeSubscriber(TextViewPositionListener positionListener) { 3009 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3010 if (mPositionListeners[i] == positionListener) { 3011 mPositionListeners[i] = null; 3012 mNumberOfListeners--; 3013 break; 3014 } 3015 } 3016 3017 if (mNumberOfListeners == 0) { 3018 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3019 vto.removeOnPreDrawListener(this); 3020 } 3021 } 3022 3023 public int getPositionX() { 3024 return mPositionX; 3025 } 3026 3027 public int getPositionY() { 3028 return mPositionY; 3029 } 3030 3031 public int getPositionXOnScreen() { 3032 return mPositionXOnScreen; 3033 } 3034 3035 public int getPositionYOnScreen() { 3036 return mPositionYOnScreen; 3037 } 3038 3039 @Override 3040 public boolean onPreDraw() { 3041 updatePosition(); 3042 3043 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3044 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3045 TextViewPositionListener positionListener = mPositionListeners[i]; 3046 if (positionListener != null) { 3047 positionListener.updatePosition(mPositionX, mPositionY, 3048 mPositionHasChanged, mScrollHasChanged); 3049 } 3050 } 3051 } 3052 3053 mScrollHasChanged = false; 3054 return true; 3055 } 3056 3057 private void updatePosition() { 3058 mTextView.getLocationInWindow(mTempCoords); 3059 3060 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3061 3062 mPositionX = mTempCoords[0]; 3063 mPositionY = mTempCoords[1]; 3064 3065 mTextView.getLocationOnScreen(mTempCoords); 3066 3067 mPositionXOnScreen = mTempCoords[0]; 3068 mPositionYOnScreen = mTempCoords[1]; 3069 } 3070 3071 public void onScrollChanged() { 3072 mScrollHasChanged = true; 3073 } 3074 } 3075 3076 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3077 protected PopupWindow mPopupWindow; 3078 protected ViewGroup mContentView; 3079 int mPositionX, mPositionY; 3080 int mClippingLimitLeft, mClippingLimitRight; 3081 3082 protected abstract void createPopupWindow(); 3083 protected abstract void initContentView(); 3084 protected abstract int getTextOffset(); 3085 protected abstract int getVerticalLocalPosition(int line); 3086 protected abstract int clipVertically(int positionY); 3087 protected void setUp() { 3088 } 3089 3090 public PinnedPopupWindow() { 3091 // Due to calling subclass methods in base constructor, subclass constructor is not 3092 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3093 // a chance to initialize subclasses, call setUp() method here. 3094 // TODO: It is good to extract non trivial initialization code from constructor. 3095 setUp(); 3096 3097 createPopupWindow(); 3098 3099 mPopupWindow.setWindowLayoutType( 3100 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3101 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3102 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3103 3104 initContentView(); 3105 3106 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3107 ViewGroup.LayoutParams.WRAP_CONTENT); 3108 mContentView.setLayoutParams(wrapContent); 3109 3110 mPopupWindow.setContentView(mContentView); 3111 } 3112 3113 public void show() { 3114 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3115 3116 computeLocalPosition(); 3117 3118 final PositionListener positionListener = getPositionListener(); 3119 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3120 } 3121 3122 protected void measureContent() { 3123 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3124 mContentView.measure( 3125 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3126 View.MeasureSpec.AT_MOST), 3127 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3128 View.MeasureSpec.AT_MOST)); 3129 } 3130 3131 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3132 * positioned according to viewportToContentHorizontalOffset. 3133 * 3134 * This method assumes that mContentView has properly been measured from its content. */ 3135 private void computeLocalPosition() { 3136 measureContent(); 3137 final int width = mContentView.getMeasuredWidth(); 3138 final int offset = getTextOffset(); 3139 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3140 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3141 3142 final int line = mTextView.getLayout().getLineForOffset(offset); 3143 mPositionY = getVerticalLocalPosition(line); 3144 mPositionY += mTextView.viewportToContentVerticalOffset(); 3145 } 3146 3147 private void updatePosition(int parentPositionX, int parentPositionY) { 3148 int positionX = parentPositionX + mPositionX; 3149 int positionY = parentPositionY + mPositionY; 3150 3151 positionY = clipVertically(positionY); 3152 3153 // Horizontal clipping 3154 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3155 final int width = mContentView.getMeasuredWidth(); 3156 positionX = Math.min( 3157 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3158 positionX = Math.max(-mClippingLimitLeft, positionX); 3159 3160 if (isShowing()) { 3161 mPopupWindow.update(positionX, positionY, -1, -1); 3162 } else { 3163 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3164 positionX, positionY); 3165 } 3166 } 3167 3168 public void hide() { 3169 if (!isShowing()) { 3170 return; 3171 } 3172 mPopupWindow.dismiss(); 3173 getPositionListener().removeSubscriber(this); 3174 } 3175 3176 @Override 3177 public void updatePosition(int parentPositionX, int parentPositionY, 3178 boolean parentPositionChanged, boolean parentScrolled) { 3179 // Either parentPositionChanged or parentScrolled is true, check if still visible 3180 if (isShowing() && isOffsetVisible(getTextOffset())) { 3181 if (parentScrolled) computeLocalPosition(); 3182 updatePosition(parentPositionX, parentPositionY); 3183 } else { 3184 hide(); 3185 } 3186 } 3187 3188 public boolean isShowing() { 3189 return mPopupWindow.isShowing(); 3190 } 3191 } 3192 3193 private static final class SuggestionInfo { 3194 // Range of actual suggestion within mText 3195 int mSuggestionStart, mSuggestionEnd; 3196 3197 // The SuggestionSpan that this TextView represents 3198 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3199 3200 // The index of this suggestion inside suggestionSpan 3201 int mSuggestionIndex; 3202 3203 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3204 3205 void clear() { 3206 mSuggestionSpanInfo.clear(); 3207 mText.clear(); 3208 } 3209 3210 // Utility method to set attributes about a SuggestionSpan. 3211 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3212 mSuggestionSpanInfo.mSuggestionSpan = span; 3213 mSuggestionSpanInfo.mSpanStart = spanStart; 3214 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3215 } 3216 } 3217 3218 private static final class SuggestionSpanInfo { 3219 // The SuggestionSpan; 3220 @Nullable 3221 SuggestionSpan mSuggestionSpan; 3222 3223 // The SuggestionSpan start position 3224 int mSpanStart; 3225 3226 // The SuggestionSpan end position 3227 int mSpanEnd; 3228 3229 void clear() { 3230 mSuggestionSpan = null; 3231 } 3232 } 3233 3234 private class SuggestionHelper { 3235 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3236 new SuggestionSpanComparator(); 3237 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3238 new HashMap<SuggestionSpan, Integer>(); 3239 3240 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3241 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3242 final int flag1 = span1.getFlags(); 3243 final int flag2 = span2.getFlags(); 3244 if (flag1 != flag2) { 3245 // The order here should match what is used in updateDrawState 3246 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3247 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3248 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3249 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3250 if (easy1 && !misspelled1) return -1; 3251 if (easy2 && !misspelled2) return 1; 3252 if (misspelled1) return -1; 3253 if (misspelled2) return 1; 3254 } 3255 3256 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3257 } 3258 } 3259 3260 /** 3261 * Returns the suggestion spans that cover the current cursor position. The suggestion 3262 * spans are sorted according to the length of text that they are attached to. 3263 */ 3264 private SuggestionSpan[] getSortedSuggestionSpans() { 3265 int pos = mTextView.getSelectionStart(); 3266 Spannable spannable = (Spannable) mTextView.getText(); 3267 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3268 3269 mSpansLengths.clear(); 3270 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3271 int start = spannable.getSpanStart(suggestionSpan); 3272 int end = spannable.getSpanEnd(suggestionSpan); 3273 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3274 } 3275 3276 // The suggestions are sorted according to their types (easy correction first, then 3277 // misspelled) and to the length of the text that they cover (shorter first). 3278 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3279 mSpansLengths.clear(); 3280 3281 return suggestionSpans; 3282 } 3283 3284 /** 3285 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3286 * position. 3287 * 3288 * @param suggestionInfos SuggestionInfo array the results will be set. 3289 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3290 * @return the number of suggestions actually fetched. 3291 */ 3292 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3293 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3294 final Spannable spannable = (Spannable) mTextView.getText(); 3295 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3296 final int nbSpans = suggestionSpans.length; 3297 if (nbSpans == 0) return 0; 3298 3299 int numberOfSuggestions = 0; 3300 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3301 final int spanStart = spannable.getSpanStart(suggestionSpan); 3302 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3303 3304 if (misspelledSpanInfo != null 3305 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3306 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3307 misspelledSpanInfo.mSpanStart = spanStart; 3308 misspelledSpanInfo.mSpanEnd = spanEnd; 3309 } 3310 3311 final String[] suggestions = suggestionSpan.getSuggestions(); 3312 final int nbSuggestions = suggestions.length; 3313 suggestionLoop: 3314 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3315 final String suggestion = suggestions[suggestionIndex]; 3316 for (int i = 0; i < numberOfSuggestions; i++) { 3317 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3318 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3319 final int otherSpanStart = 3320 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3321 final int otherSpanEnd = 3322 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3323 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3324 continue suggestionLoop; 3325 } 3326 } 3327 } 3328 3329 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3330 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3331 suggestionInfo.mSuggestionIndex = suggestionIndex; 3332 suggestionInfo.mSuggestionStart = 0; 3333 suggestionInfo.mSuggestionEnd = suggestion.length(); 3334 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3335 numberOfSuggestions++; 3336 if (numberOfSuggestions >= suggestionInfos.length) { 3337 return numberOfSuggestions; 3338 } 3339 } 3340 } 3341 return numberOfSuggestions; 3342 } 3343 } 3344 3345 @VisibleForTesting 3346 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3347 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3348 3349 // Key of intent extras for inserting new word into user dictionary. 3350 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3351 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3352 3353 private SuggestionInfo[] mSuggestionInfos; 3354 private int mNumberOfSuggestions; 3355 private boolean mCursorWasVisibleBeforeSuggestions; 3356 private boolean mIsShowingUp = false; 3357 private SuggestionAdapter mSuggestionsAdapter; 3358 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3359 private TextView mAddToDictionaryButton; 3360 private TextView mDeleteButton; 3361 private ListView mSuggestionListView; 3362 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3363 private int mContainerMarginWidth; 3364 private int mContainerMarginTop; 3365 private LinearLayout mContainerView; 3366 private Context mContext; // TODO: Make mContext final. 3367 3368 private class CustomPopupWindow extends PopupWindow { 3369 3370 @Override 3371 public void dismiss() { 3372 if (!isShowing()) { 3373 return; 3374 } 3375 super.dismiss(); 3376 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3377 3378 // Safe cast since show() checks that mTextView.getText() is an Editable 3379 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3380 3381 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3382 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3383 getInsertionController().show(); 3384 } 3385 } 3386 } 3387 3388 public SuggestionsPopupWindow() { 3389 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3390 } 3391 3392 @Override 3393 protected void setUp() { 3394 mContext = applyDefaultTheme(mTextView.getContext()); 3395 mHighlightSpan = new TextAppearanceSpan(mContext, 3396 mTextView.mTextEditSuggestionHighlightStyle); 3397 } 3398 3399 private Context applyDefaultTheme(Context originalContext) { 3400 TypedArray a = originalContext.obtainStyledAttributes( 3401 new int[]{com.android.internal.R.attr.isLightTheme}); 3402 boolean isLightTheme = a.getBoolean(0, true); 3403 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3404 : R.style.ThemeOverlay_Material_Dark; 3405 a.recycle(); 3406 return new ContextThemeWrapper(originalContext, themeId); 3407 } 3408 3409 @Override 3410 protected void createPopupWindow() { 3411 mPopupWindow = new CustomPopupWindow(); 3412 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3413 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3414 mPopupWindow.setFocusable(true); 3415 mPopupWindow.setClippingEnabled(false); 3416 } 3417 3418 @Override 3419 protected void initContentView() { 3420 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3421 Context.LAYOUT_INFLATER_SERVICE); 3422 mContentView = (ViewGroup) inflater.inflate( 3423 mTextView.mTextEditSuggestionContainerLayout, null); 3424 3425 mContainerView = (LinearLayout) mContentView.findViewById( 3426 com.android.internal.R.id.suggestionWindowContainer); 3427 ViewGroup.MarginLayoutParams lp = 3428 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3429 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3430 mContainerMarginTop = lp.topMargin; 3431 mClippingLimitLeft = lp.leftMargin; 3432 mClippingLimitRight = lp.rightMargin; 3433 3434 mSuggestionListView = (ListView) mContentView.findViewById( 3435 com.android.internal.R.id.suggestionContainer); 3436 3437 mSuggestionsAdapter = new SuggestionAdapter(); 3438 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3439 mSuggestionListView.setOnItemClickListener(this); 3440 3441 // Inflate the suggestion items once and for all. 3442 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3443 for (int i = 0; i < mSuggestionInfos.length; i++) { 3444 mSuggestionInfos[i] = new SuggestionInfo(); 3445 } 3446 3447 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3448 com.android.internal.R.id.addToDictionaryButton); 3449 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3450 public void onClick(View v) { 3451 final SuggestionSpan misspelledSpan = 3452 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3453 if (misspelledSpan == null) { 3454 // Span has been removed. 3455 return; 3456 } 3457 final Editable editable = (Editable) mTextView.getText(); 3458 final int spanStart = editable.getSpanStart(misspelledSpan); 3459 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3460 if (spanStart < 0 || spanEnd <= spanStart) { 3461 return; 3462 } 3463 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3464 3465 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3466 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3467 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3468 mTextView.getTextServicesLocale().toString()); 3469 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3470 mTextView.getContext().startActivity(intent); 3471 // There is no way to know if the word was indeed added. Re-check. 3472 // TODO The ExtractEditText should remove the span in the original text instead 3473 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3474 Selection.setSelection(editable, spanEnd); 3475 updateSpellCheckSpans(spanStart, spanEnd, false); 3476 hideWithCleanUp(); 3477 } 3478 }); 3479 3480 mDeleteButton = (TextView) mContentView.findViewById( 3481 com.android.internal.R.id.deleteButton); 3482 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3483 public void onClick(View v) { 3484 final Editable editable = (Editable) mTextView.getText(); 3485 3486 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3487 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3488 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3489 // Do not leave two adjacent spaces after deletion, or one at beginning of 3490 // text 3491 if (spanUnionEnd < editable.length() 3492 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3493 && (spanUnionStart == 0 3494 || Character.isSpaceChar( 3495 editable.charAt(spanUnionStart - 1)))) { 3496 spanUnionEnd = spanUnionEnd + 1; 3497 } 3498 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3499 } 3500 hideWithCleanUp(); 3501 } 3502 }); 3503 3504 } 3505 3506 public boolean isShowingUp() { 3507 return mIsShowingUp; 3508 } 3509 3510 public void onParentLostFocus() { 3511 mIsShowingUp = false; 3512 } 3513 3514 private class SuggestionAdapter extends BaseAdapter { 3515 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3516 Context.LAYOUT_INFLATER_SERVICE); 3517 3518 @Override 3519 public int getCount() { 3520 return mNumberOfSuggestions; 3521 } 3522 3523 @Override 3524 public Object getItem(int position) { 3525 return mSuggestionInfos[position]; 3526 } 3527 3528 @Override 3529 public long getItemId(int position) { 3530 return position; 3531 } 3532 3533 @Override 3534 public View getView(int position, View convertView, ViewGroup parent) { 3535 TextView textView = (TextView) convertView; 3536 3537 if (textView == null) { 3538 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3539 parent, false); 3540 } 3541 3542 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3543 textView.setText(suggestionInfo.mText); 3544 return textView; 3545 } 3546 } 3547 3548 @VisibleForTesting 3549 public ViewGroup getContentViewForTesting() { 3550 return mContentView; 3551 } 3552 3553 @Override 3554 public void show() { 3555 if (!(mTextView.getText() instanceof Editable)) return; 3556 if (extractedTextModeWillBeStarted()) { 3557 return; 3558 } 3559 3560 if (updateSuggestions()) { 3561 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3562 mTextView.setCursorVisible(false); 3563 mIsShowingUp = true; 3564 super.show(); 3565 } 3566 } 3567 3568 @Override 3569 protected void measureContent() { 3570 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3571 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3572 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3573 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3574 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3575 3576 int width = 0; 3577 View view = null; 3578 for (int i = 0; i < mNumberOfSuggestions; i++) { 3579 view = mSuggestionsAdapter.getView(i, view, mContentView); 3580 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3581 view.measure(horizontalMeasure, verticalMeasure); 3582 width = Math.max(width, view.getMeasuredWidth()); 3583 } 3584 3585 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3586 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3587 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3588 } 3589 3590 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3591 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3592 3593 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3594 + mContainerMarginWidth; 3595 3596 // Enforce the width based on actual text widths 3597 mContentView.measure( 3598 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3599 verticalMeasure); 3600 3601 Drawable popupBackground = mPopupWindow.getBackground(); 3602 if (popupBackground != null) { 3603 if (mTempRect == null) mTempRect = new Rect(); 3604 popupBackground.getPadding(mTempRect); 3605 width += mTempRect.left + mTempRect.right; 3606 } 3607 mPopupWindow.setWidth(width); 3608 } 3609 3610 @Override 3611 protected int getTextOffset() { 3612 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3613 } 3614 3615 @Override 3616 protected int getVerticalLocalPosition(int line) { 3617 return mTextView.getLayout().getLineBottom(line) - mContainerMarginTop; 3618 } 3619 3620 @Override 3621 protected int clipVertically(int positionY) { 3622 final int height = mContentView.getMeasuredHeight(); 3623 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3624 return Math.min(positionY, displayMetrics.heightPixels - height); 3625 } 3626 3627 private void hideWithCleanUp() { 3628 for (final SuggestionInfo info : mSuggestionInfos) { 3629 info.clear(); 3630 } 3631 mMisspelledSpanInfo.clear(); 3632 hide(); 3633 } 3634 3635 private boolean updateSuggestions() { 3636 Spannable spannable = (Spannable) mTextView.getText(); 3637 mNumberOfSuggestions = 3638 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3639 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3640 return false; 3641 } 3642 3643 int spanUnionStart = mTextView.getText().length(); 3644 int spanUnionEnd = 0; 3645 3646 for (int i = 0; i < mNumberOfSuggestions; i++) { 3647 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3648 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3649 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3650 } 3651 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3652 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3653 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3654 } 3655 3656 for (int i = 0; i < mNumberOfSuggestions; i++) { 3657 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3658 } 3659 3660 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3661 int addToDictionaryButtonVisibility = View.GONE; 3662 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3663 if (mMisspelledSpanInfo.mSpanStart >= 0 3664 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3665 addToDictionaryButtonVisibility = View.VISIBLE; 3666 } 3667 } 3668 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3669 3670 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3671 final int underlineColor; 3672 if (mNumberOfSuggestions != 0) { 3673 underlineColor = 3674 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3675 } else { 3676 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3677 } 3678 3679 if (underlineColor == 0) { 3680 // Fallback on the default highlight color when the first span does not provide one 3681 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3682 } else { 3683 final float BACKGROUND_TRANSPARENCY = 0.4f; 3684 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3685 mSuggestionRangeSpan.setBackgroundColor( 3686 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3687 } 3688 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3689 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3690 3691 mSuggestionsAdapter.notifyDataSetChanged(); 3692 return true; 3693 } 3694 3695 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3696 int unionEnd) { 3697 final Spannable text = (Spannable) mTextView.getText(); 3698 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3699 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3700 3701 // Adjust the start/end of the suggestion span 3702 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3703 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3704 + suggestionInfo.mText.length(); 3705 3706 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3707 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3708 3709 // Add the text before and after the span. 3710 final String textAsString = text.toString(); 3711 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3712 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3713 } 3714 3715 @Override 3716 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3717 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3718 replaceWithSuggestion(suggestionInfo); 3719 hideWithCleanUp(); 3720 } 3721 } 3722 3723 /** 3724 * An ActionMode Callback class that is used to provide actions while in text insertion or 3725 * selection mode. 3726 * 3727 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3728 * actions, depending on which of these this TextView supports and the current selection. 3729 */ 3730 private class TextActionModeCallback extends ActionMode.Callback2 { 3731 private final Path mSelectionPath = new Path(); 3732 private final RectF mSelectionBounds = new RectF(); 3733 private final boolean mHasSelection; 3734 private final int mHandleHeight; 3735 3736 public TextActionModeCallback(boolean hasSelection) { 3737 mHasSelection = hasSelection; 3738 if (mHasSelection) { 3739 SelectionModifierCursorController selectionController = getSelectionController(); 3740 if (selectionController.mStartHandle == null) { 3741 // As these are for initializing selectionController, hide() must be called. 3742 selectionController.initDrawables(); 3743 selectionController.initHandles(); 3744 selectionController.hide(); 3745 } 3746 mHandleHeight = Math.max( 3747 mSelectHandleLeft.getMinimumHeight(), 3748 mSelectHandleRight.getMinimumHeight()); 3749 } else { 3750 InsertionPointCursorController insertionController = getInsertionController(); 3751 if (insertionController != null) { 3752 insertionController.getHandle(); 3753 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3754 } else { 3755 mHandleHeight = 0; 3756 } 3757 } 3758 } 3759 3760 @Override 3761 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3762 mode.setTitle(null); 3763 mode.setSubtitle(null); 3764 mode.setTitleOptionalHint(true); 3765 populateMenuWithItems(menu); 3766 updateAssistMenuItem(menu); 3767 3768 Callback customCallback = getCustomCallback(); 3769 if (customCallback != null) { 3770 if (!customCallback.onCreateActionMode(mode, menu)) { 3771 // The custom mode can choose to cancel the action mode, dismiss selection. 3772 Selection.setSelection((Spannable) mTextView.getText(), 3773 mTextView.getSelectionEnd()); 3774 return false; 3775 } 3776 } 3777 3778 if (mTextView.canProcessText()) { 3779 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3780 } 3781 3782 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3783 if (mHasSelection && !mTextView.hasTransientState()) { 3784 mTextView.setHasTransientState(true); 3785 } 3786 return true; 3787 } else { 3788 return false; 3789 } 3790 } 3791 3792 private Callback getCustomCallback() { 3793 return mHasSelection 3794 ? mCustomSelectionActionModeCallback 3795 : mCustomInsertionActionModeCallback; 3796 } 3797 3798 private void populateMenuWithItems(Menu menu) { 3799 if (mTextView.canCut()) { 3800 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3801 com.android.internal.R.string.cut) 3802 .setAlphabeticShortcut('x') 3803 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3804 } 3805 3806 if (mTextView.canCopy()) { 3807 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3808 com.android.internal.R.string.copy) 3809 .setAlphabeticShortcut('c') 3810 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3811 } 3812 3813 if (mTextView.canPaste()) { 3814 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3815 com.android.internal.R.string.paste) 3816 .setAlphabeticShortcut('v') 3817 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3818 } 3819 3820 if (mTextView.canShare()) { 3821 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3822 com.android.internal.R.string.share) 3823 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3824 } 3825 3826 updateSelectAllItem(menu); 3827 updateReplaceItem(menu); 3828 } 3829 3830 @Override 3831 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3832 updateSelectAllItem(menu); 3833 updateReplaceItem(menu); 3834 updateAssistMenuItem(menu); 3835 3836 Callback customCallback = getCustomCallback(); 3837 if (customCallback != null) { 3838 return customCallback.onPrepareActionMode(mode, menu); 3839 } 3840 return true; 3841 } 3842 3843 private void updateSelectAllItem(Menu menu) { 3844 boolean canSelectAll = mTextView.canSelectAllText(); 3845 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3846 if (canSelectAll && !selectAllItemExists) { 3847 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3848 com.android.internal.R.string.selectAll) 3849 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3850 } else if (!canSelectAll && selectAllItemExists) { 3851 menu.removeItem(TextView.ID_SELECT_ALL); 3852 } 3853 } 3854 3855 private void updateReplaceItem(Menu menu) { 3856 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3857 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3858 if (canReplace && !replaceItemExists) { 3859 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3860 com.android.internal.R.string.replace) 3861 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3862 } else if (!canReplace && replaceItemExists) { 3863 menu.removeItem(TextView.ID_REPLACE); 3864 } 3865 } 3866 3867 private void updateAssistMenuItem(Menu menu) { 3868 menu.removeItem(TextView.ID_ASSIST); 3869 final TextClassificationResult textClassificationResult = 3870 getSelectionActionModeHelper().getTextClassificationResult(); 3871 if (textClassificationResult != null) { 3872 final Drawable icon = textClassificationResult.getIcon(); 3873 final CharSequence label = textClassificationResult.getLabel(); 3874 final OnClickListener onClickListener = 3875 textClassificationResult.getOnClickListener(); 3876 final Intent intent = textClassificationResult.getIntent(); 3877 if ((icon != null || !TextUtils.isEmpty(label)) 3878 && (onClickListener != null || intent != null)) { 3879 menu.add(TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, label) 3880 .setIcon(icon) 3881 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3882 } 3883 } 3884 } 3885 3886 @Override 3887 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3888 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3889 return true; 3890 } 3891 Callback customCallback = getCustomCallback(); 3892 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3893 return true; 3894 } 3895 final TextClassificationResult textClassificationResult = 3896 getSelectionActionModeHelper().getTextClassificationResult(); 3897 if (TextView.ID_ASSIST == item.getItemId() && textClassificationResult != null) { 3898 final OnClickListener onClickListener = 3899 textClassificationResult.getOnClickListener(); 3900 if (onClickListener != null) { 3901 onClickListener.onClick(mTextView); 3902 } else { 3903 final Intent intent = textClassificationResult.getIntent(); 3904 if (intent != null) { 3905 TextClassificationResult.createStartActivityOnClickListener( 3906 mTextView.getContext(), intent) 3907 .onClick(mTextView); 3908 } 3909 } 3910 stopTextActionMode(); 3911 return true; 3912 } 3913 return mTextView.onTextContextMenuItem(item.getItemId()); 3914 } 3915 3916 @Override 3917 public void onDestroyActionMode(ActionMode mode) { 3918 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3919 getSelectionActionModeHelper().cancelAsyncTask(); 3920 mTextActionMode = null; 3921 Callback customCallback = getCustomCallback(); 3922 if (customCallback != null) { 3923 customCallback.onDestroyActionMode(mode); 3924 } 3925 3926 if (!mPreserveSelection) { 3927 /* 3928 * Leave current selection when we tentatively destroy action mode for the 3929 * selection. If we're detaching from a window, we'll bring back the selection 3930 * mode when (if) we get reattached. 3931 */ 3932 Selection.setSelection((Spannable) mTextView.getText(), 3933 mTextView.getSelectionEnd()); 3934 } 3935 3936 if (mSelectionModifierCursorController != null) { 3937 mSelectionModifierCursorController.hide(); 3938 } 3939 } 3940 3941 @Override 3942 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3943 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3944 super.onGetContentRect(mode, view, outRect); 3945 return; 3946 } 3947 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3948 // We have a selection. 3949 mSelectionPath.reset(); 3950 mTextView.getLayout().getSelectionPath( 3951 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3952 mSelectionPath.computeBounds(mSelectionBounds, true); 3953 mSelectionBounds.bottom += mHandleHeight; 3954 } else if (mCursorCount == 2) { 3955 // We have a split cursor. In this case, we take the rectangle that includes both 3956 // parts of the cursor to ensure we don't obscure either of them. 3957 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3958 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3959 mSelectionBounds.set( 3960 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3961 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3962 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3963 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3964 + mHandleHeight); 3965 } else { 3966 // We have a single cursor. 3967 Layout layout = mTextView.getLayout(); 3968 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 3969 float primaryHorizontal = clampHorizontalPosition(null, 3970 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 3971 mSelectionBounds.set( 3972 primaryHorizontal, 3973 layout.getLineTop(line), 3974 primaryHorizontal, 3975 layout.getLineTop(line + 1) + mHandleHeight); 3976 } 3977 // Take TextView's padding and scroll into account. 3978 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3979 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3980 outRect.set( 3981 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3982 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3983 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3984 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3985 } 3986 } 3987 3988 /** 3989 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3990 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3991 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3992 */ 3993 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3994 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3995 final int[] mTmpIntOffset = new int[2]; 3996 final Matrix mViewToScreenMatrix = new Matrix(); 3997 3998 @Override 3999 public void updatePosition(int parentPositionX, int parentPositionY, 4000 boolean parentPositionChanged, boolean parentScrolled) { 4001 final InputMethodState ims = mInputMethodState; 4002 if (ims == null || ims.mBatchEditNesting > 0) { 4003 return; 4004 } 4005 final InputMethodManager imm = InputMethodManager.peekInstance(); 4006 if (null == imm) { 4007 return; 4008 } 4009 if (!imm.isActive(mTextView)) { 4010 return; 4011 } 4012 // Skip if the IME has not requested the cursor/anchor position. 4013 if (!imm.isCursorAnchorInfoEnabled()) { 4014 return; 4015 } 4016 Layout layout = mTextView.getLayout(); 4017 if (layout == null) { 4018 return; 4019 } 4020 4021 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4022 builder.reset(); 4023 4024 final int selectionStart = mTextView.getSelectionStart(); 4025 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4026 4027 // Construct transformation matrix from view local coordinates to screen coordinates. 4028 mViewToScreenMatrix.set(mTextView.getMatrix()); 4029 mTextView.getLocationOnScreen(mTmpIntOffset); 4030 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4031 builder.setMatrix(mViewToScreenMatrix); 4032 4033 final float viewportToContentHorizontalOffset = 4034 mTextView.viewportToContentHorizontalOffset(); 4035 final float viewportToContentVerticalOffset = 4036 mTextView.viewportToContentVerticalOffset(); 4037 4038 final CharSequence text = mTextView.getText(); 4039 if (text instanceof Spannable) { 4040 final Spannable sp = (Spannable) text; 4041 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4042 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4043 if (composingTextEnd < composingTextStart) { 4044 final int temp = composingTextEnd; 4045 composingTextEnd = composingTextStart; 4046 composingTextStart = temp; 4047 } 4048 final boolean hasComposingText = 4049 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4050 if (hasComposingText) { 4051 final CharSequence composingText = text.subSequence(composingTextStart, 4052 composingTextEnd); 4053 builder.setComposingText(composingTextStart, composingText); 4054 mTextView.populateCharacterBounds(builder, composingTextStart, 4055 composingTextEnd, viewportToContentHorizontalOffset, 4056 viewportToContentVerticalOffset); 4057 } 4058 } 4059 4060 // Treat selectionStart as the insertion point. 4061 if (0 <= selectionStart) { 4062 final int offset = selectionStart; 4063 final int line = layout.getLineForOffset(offset); 4064 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4065 + viewportToContentHorizontalOffset; 4066 final float insertionMarkerTop = layout.getLineTop(line) 4067 + viewportToContentVerticalOffset; 4068 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4069 + viewportToContentVerticalOffset; 4070 final float insertionMarkerBottom = layout.getLineBottom(line) 4071 + viewportToContentVerticalOffset; 4072 final boolean isTopVisible = mTextView 4073 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4074 final boolean isBottomVisible = mTextView 4075 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4076 int insertionMarkerFlags = 0; 4077 if (isTopVisible || isBottomVisible) { 4078 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4079 } 4080 if (!isTopVisible || !isBottomVisible) { 4081 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4082 } 4083 if (layout.isRtlCharAt(offset)) { 4084 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4085 } 4086 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4087 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4088 } 4089 4090 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4091 } 4092 } 4093 4094 @VisibleForTesting 4095 public abstract class HandleView extends View implements TextViewPositionListener { 4096 protected Drawable mDrawable; 4097 protected Drawable mDrawableLtr; 4098 protected Drawable mDrawableRtl; 4099 private final PopupWindow mContainer; 4100 // Position with respect to the parent TextView 4101 private int mPositionX, mPositionY; 4102 private boolean mIsDragging; 4103 // Offset from touch position to mPosition 4104 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4105 protected int mHotspotX; 4106 protected int mHorizontalGravity; 4107 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4108 private float mTouchOffsetY; 4109 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4110 private float mIdealVerticalOffset; 4111 // Parent's (TextView) previous position in window 4112 private int mLastParentX, mLastParentY; 4113 // Parent's (TextView) previous position on screen 4114 private int mLastParentXOnScreen, mLastParentYOnScreen; 4115 // Previous text character offset 4116 protected int mPreviousOffset = -1; 4117 // Previous text character offset 4118 private boolean mPositionHasChanged = true; 4119 // Minimum touch target size for handles 4120 private int mMinSize; 4121 // Indicates the line of text that the handle is on. 4122 protected int mPrevLine = UNSET_LINE; 4123 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4124 // when selecting text when the handles jump to the end / start of words which may be on 4125 // a different line. 4126 protected int mPreviousLineTouched = UNSET_LINE; 4127 4128 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4129 super(mTextView.getContext()); 4130 setId(id); 4131 mContainer = new PopupWindow(mTextView.getContext(), null, 4132 com.android.internal.R.attr.textSelectHandleWindowStyle); 4133 mContainer.setSplitTouchEnabled(true); 4134 mContainer.setClippingEnabled(false); 4135 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4136 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4137 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4138 mContainer.setContentView(this); 4139 4140 mDrawableLtr = drawableLtr; 4141 mDrawableRtl = drawableRtl; 4142 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4143 com.android.internal.R.dimen.text_handle_min_size); 4144 4145 updateDrawable(); 4146 4147 final int handleHeight = getPreferredHeight(); 4148 mTouchOffsetY = -0.3f * handleHeight; 4149 mIdealVerticalOffset = 0.7f * handleHeight; 4150 } 4151 4152 public float getIdealVerticalOffset() { 4153 return mIdealVerticalOffset; 4154 } 4155 4156 protected void updateDrawable() { 4157 if (mIsDragging) { 4158 // Don't update drawable during dragging. 4159 return; 4160 } 4161 final Layout layout = mTextView.getLayout(); 4162 if (layout == null) { 4163 return; 4164 } 4165 final int offset = getCurrentCursorOffset(); 4166 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4167 final Drawable oldDrawable = mDrawable; 4168 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4169 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4170 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4171 if (oldDrawable != mDrawable && isShowing()) { 4172 // Update popup window position. 4173 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4174 - getHorizontalOffset() + getCursorOffset(); 4175 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4176 mPositionHasChanged = true; 4177 updatePosition(mLastParentX, mLastParentY, false, false); 4178 postInvalidate(); 4179 } 4180 } 4181 4182 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4183 protected abstract int getHorizontalGravity(boolean isRtlRun); 4184 4185 // Touch-up filter: number of previous positions remembered 4186 private static final int HISTORY_SIZE = 5; 4187 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4188 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4189 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4190 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4191 private int mPreviousOffsetIndex = 0; 4192 private int mNumberPreviousOffsets = 0; 4193 4194 private void startTouchUpFilter(int offset) { 4195 mNumberPreviousOffsets = 0; 4196 addPositionToTouchUpFilter(offset); 4197 } 4198 4199 private void addPositionToTouchUpFilter(int offset) { 4200 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4201 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4202 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4203 mNumberPreviousOffsets++; 4204 } 4205 4206 private void filterOnTouchUp() { 4207 final long now = SystemClock.uptimeMillis(); 4208 int i = 0; 4209 int index = mPreviousOffsetIndex; 4210 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4211 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4212 i++; 4213 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4214 } 4215 4216 if (i > 0 && i < iMax 4217 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4218 positionAtCursorOffset(mPreviousOffsets[index], false); 4219 } 4220 } 4221 4222 public boolean offsetHasBeenChanged() { 4223 return mNumberPreviousOffsets > 1; 4224 } 4225 4226 @Override 4227 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4228 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4229 } 4230 4231 @Override 4232 public void invalidate() { 4233 super.invalidate(); 4234 if (isShowing()) { 4235 positionAtCursorOffset(getCurrentCursorOffset(), true); 4236 } 4237 }; 4238 4239 private int getPreferredWidth() { 4240 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4241 } 4242 4243 private int getPreferredHeight() { 4244 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4245 } 4246 4247 public void show() { 4248 if (isShowing()) return; 4249 4250 getPositionListener().addSubscriber(this, true /* local position may change */); 4251 4252 // Make sure the offset is always considered new, even when focusing at same position 4253 mPreviousOffset = -1; 4254 positionAtCursorOffset(getCurrentCursorOffset(), false); 4255 } 4256 4257 protected void dismiss() { 4258 mIsDragging = false; 4259 mContainer.dismiss(); 4260 onDetached(); 4261 } 4262 4263 public void hide() { 4264 dismiss(); 4265 4266 getPositionListener().removeSubscriber(this); 4267 } 4268 4269 public boolean isShowing() { 4270 return mContainer.isShowing(); 4271 } 4272 4273 private boolean isVisible() { 4274 // Always show a dragging handle. 4275 if (mIsDragging) { 4276 return true; 4277 } 4278 4279 if (mTextView.isInBatchEditMode()) { 4280 return false; 4281 } 4282 4283 return mTextView.isPositionVisible( 4284 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4285 } 4286 4287 public abstract int getCurrentCursorOffset(); 4288 4289 protected abstract void updateSelection(int offset); 4290 4291 public abstract void updatePosition(float x, float y); 4292 4293 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4294 return layout.isRtlCharAt(offset); 4295 } 4296 4297 @VisibleForTesting 4298 public float getHorizontal(@NonNull Layout layout, int offset) { 4299 return layout.getPrimaryHorizontal(offset); 4300 } 4301 4302 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4303 return mTextView.getOffsetAtCoordinate(line, x); 4304 } 4305 4306 /** 4307 * @param offset Cursor offset. Must be in [-1, length]. 4308 * @param forceUpdatePosition whether to force update the position. This should be true 4309 * when If the parent has been scrolled, for example. 4310 */ 4311 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4312 // A HandleView relies on the layout, which may be nulled by external methods 4313 Layout layout = mTextView.getLayout(); 4314 if (layout == null) { 4315 // Will update controllers' state, hiding them and stopping selection mode if needed 4316 prepareCursorControllers(); 4317 return; 4318 } 4319 layout = mTextView.getLayout(); 4320 4321 boolean offsetChanged = offset != mPreviousOffset; 4322 if (offsetChanged || forceUpdatePosition) { 4323 if (offsetChanged) { 4324 updateSelection(offset); 4325 addPositionToTouchUpFilter(offset); 4326 } 4327 final int line = getLineForOffset(layout, offset); 4328 mPrevLine = line; 4329 4330 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4331 - getHorizontalOffset() + getCursorOffset(); 4332 mPositionY = layout.getLineBottom(line); 4333 4334 // Take TextView's padding and scroll into account. 4335 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4336 mPositionY += mTextView.viewportToContentVerticalOffset(); 4337 4338 mPreviousOffset = offset; 4339 mPositionHasChanged = true; 4340 } 4341 } 4342 4343 /** 4344 * Return the clamped horizontal position for the first cursor. 4345 * 4346 * @param layout Text layout. 4347 * @param offset Character offset for the cursor. 4348 * @return The clamped horizontal position for the cursor. 4349 */ 4350 int getCursorHorizontalPosition(Layout layout, int offset) { 4351 return (int) (getHorizontal(layout, offset) - 0.5f); 4352 } 4353 4354 /** 4355 * @param layout Text layout. 4356 * @param offset Character offset for the cursor. 4357 * @return The line the cursor should be at. 4358 */ 4359 int getLineForOffset(Layout layout, int offset) { 4360 return layout.getLineForOffset(offset); 4361 } 4362 4363 @Override 4364 public void updatePosition(int parentPositionX, int parentPositionY, 4365 boolean parentPositionChanged, boolean parentScrolled) { 4366 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 4367 if (parentPositionChanged || mPositionHasChanged) { 4368 if (mIsDragging) { 4369 // Update touchToWindow offset in case of parent scrolling while dragging 4370 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4371 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4372 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4373 mLastParentX = parentPositionX; 4374 mLastParentY = parentPositionY; 4375 } 4376 4377 onHandleMoved(); 4378 } 4379 4380 if (isVisible()) { 4381 // Transform to the window coordinates to follow the view tranformation. 4382 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4383 mTextView.transformFromViewToWindowSpace(pts); 4384 pts[0] -= mHotspotX + getHorizontalOffset(); 4385 4386 if (isShowing()) { 4387 mContainer.update(pts[0], pts[1], -1, -1); 4388 } else { 4389 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4390 } 4391 } else { 4392 if (isShowing()) { 4393 dismiss(); 4394 } 4395 } 4396 4397 mPositionHasChanged = false; 4398 } 4399 } 4400 4401 @Override 4402 protected void onDraw(Canvas c) { 4403 final int drawWidth = mDrawable.getIntrinsicWidth(); 4404 final int left = getHorizontalOffset(); 4405 4406 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4407 mDrawable.draw(c); 4408 } 4409 4410 private int getHorizontalOffset() { 4411 final int width = getPreferredWidth(); 4412 final int drawWidth = mDrawable.getIntrinsicWidth(); 4413 final int left; 4414 switch (mHorizontalGravity) { 4415 case Gravity.LEFT: 4416 left = 0; 4417 break; 4418 default: 4419 case Gravity.CENTER: 4420 left = (width - drawWidth) / 2; 4421 break; 4422 case Gravity.RIGHT: 4423 left = width - drawWidth; 4424 break; 4425 } 4426 return left; 4427 } 4428 4429 protected int getCursorOffset() { 4430 return 0; 4431 } 4432 4433 @Override 4434 public boolean onTouchEvent(MotionEvent ev) { 4435 updateFloatingToolbarVisibility(ev); 4436 4437 switch (ev.getActionMasked()) { 4438 case MotionEvent.ACTION_DOWN: { 4439 startTouchUpFilter(getCurrentCursorOffset()); 4440 4441 final PositionListener positionListener = getPositionListener(); 4442 mLastParentX = positionListener.getPositionX(); 4443 mLastParentY = positionListener.getPositionY(); 4444 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4445 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4446 4447 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4448 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4449 mTouchToWindowOffsetX = xInWindow - mPositionX; 4450 mTouchToWindowOffsetY = yInWindow - mPositionY; 4451 4452 mIsDragging = true; 4453 mPreviousLineTouched = UNSET_LINE; 4454 break; 4455 } 4456 4457 case MotionEvent.ACTION_MOVE: { 4458 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4459 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4460 4461 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4462 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4463 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4464 float newVerticalOffset; 4465 if (previousVerticalOffset < mIdealVerticalOffset) { 4466 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4467 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4468 } else { 4469 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4470 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4471 } 4472 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4473 4474 final float newPosX = 4475 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4476 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4477 4478 updatePosition(newPosX, newPosY); 4479 break; 4480 } 4481 4482 case MotionEvent.ACTION_UP: 4483 filterOnTouchUp(); 4484 mIsDragging = false; 4485 updateDrawable(); 4486 break; 4487 4488 case MotionEvent.ACTION_CANCEL: 4489 mIsDragging = false; 4490 updateDrawable(); 4491 break; 4492 } 4493 return true; 4494 } 4495 4496 public boolean isDragging() { 4497 return mIsDragging; 4498 } 4499 4500 void onHandleMoved() {} 4501 4502 public void onDetached() {} 4503 } 4504 4505 private class InsertionHandleView extends HandleView { 4506 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4507 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4508 4509 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4510 private float mDownPositionX, mDownPositionY; 4511 private Runnable mHider; 4512 4513 public InsertionHandleView(Drawable drawable) { 4514 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4515 } 4516 4517 @Override 4518 public void show() { 4519 super.show(); 4520 4521 final long durationSinceCutOrCopy = 4522 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4523 4524 // Cancel the single tap delayed runnable. 4525 if (mInsertionActionModeRunnable != null 4526 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4527 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4528 || isCursorInsideEasyCorrectionSpan())) { 4529 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4530 } 4531 4532 // Prepare and schedule the single tap runnable to run exactly after the double tap 4533 // timeout has passed. 4534 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4535 && !isCursorInsideEasyCorrectionSpan() 4536 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4537 if (mTextActionMode == null) { 4538 if (mInsertionActionModeRunnable == null) { 4539 mInsertionActionModeRunnable = new Runnable() { 4540 @Override 4541 public void run() { 4542 startInsertionActionMode(); 4543 } 4544 }; 4545 } 4546 mTextView.postDelayed( 4547 mInsertionActionModeRunnable, 4548 ViewConfiguration.getDoubleTapTimeout() + 1); 4549 } 4550 4551 } 4552 4553 hideAfterDelay(); 4554 } 4555 4556 private void hideAfterDelay() { 4557 if (mHider == null) { 4558 mHider = new Runnable() { 4559 public void run() { 4560 hide(); 4561 } 4562 }; 4563 } else { 4564 removeHiderCallback(); 4565 } 4566 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4567 } 4568 4569 private void removeHiderCallback() { 4570 if (mHider != null) { 4571 mTextView.removeCallbacks(mHider); 4572 } 4573 } 4574 4575 @Override 4576 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4577 return drawable.getIntrinsicWidth() / 2; 4578 } 4579 4580 @Override 4581 protected int getHorizontalGravity(boolean isRtlRun) { 4582 return Gravity.CENTER_HORIZONTAL; 4583 } 4584 4585 @Override 4586 protected int getCursorOffset() { 4587 int offset = super.getCursorOffset(); 4588 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4589 if (cursor != null) { 4590 cursor.getPadding(mTempRect); 4591 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4592 } 4593 return offset; 4594 } 4595 4596 @Override 4597 int getCursorHorizontalPosition(Layout layout, int offset) { 4598 final Drawable drawable = mCursorCount > 0 ? mCursorDrawable[0] : null; 4599 if (drawable != null) { 4600 final float horizontal = getHorizontal(layout, offset); 4601 return clampHorizontalPosition(drawable, horizontal) + mTempRect.left; 4602 } 4603 return super.getCursorHorizontalPosition(layout, offset); 4604 } 4605 4606 @Override 4607 public boolean onTouchEvent(MotionEvent ev) { 4608 final boolean result = super.onTouchEvent(ev); 4609 4610 switch (ev.getActionMasked()) { 4611 case MotionEvent.ACTION_DOWN: 4612 mDownPositionX = ev.getRawX(); 4613 mDownPositionY = ev.getRawY(); 4614 break; 4615 4616 case MotionEvent.ACTION_UP: 4617 if (!offsetHasBeenChanged()) { 4618 final float deltaX = mDownPositionX - ev.getRawX(); 4619 final float deltaY = mDownPositionY - ev.getRawY(); 4620 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4621 4622 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4623 mTextView.getContext()); 4624 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4625 4626 if (distanceSquared < touchSlop * touchSlop) { 4627 // Tapping on the handle toggles the insertion action mode. 4628 if (mTextActionMode != null) { 4629 stopTextActionMode(); 4630 } else { 4631 startInsertionActionMode(); 4632 } 4633 } 4634 } else { 4635 if (mTextActionMode != null) { 4636 mTextActionMode.invalidateContentRect(); 4637 } 4638 } 4639 hideAfterDelay(); 4640 break; 4641 4642 case MotionEvent.ACTION_CANCEL: 4643 hideAfterDelay(); 4644 break; 4645 4646 default: 4647 break; 4648 } 4649 4650 return result; 4651 } 4652 4653 @Override 4654 public int getCurrentCursorOffset() { 4655 return mTextView.getSelectionStart(); 4656 } 4657 4658 @Override 4659 public void updateSelection(int offset) { 4660 Selection.setSelection((Spannable) mTextView.getText(), offset); 4661 } 4662 4663 @Override 4664 public void updatePosition(float x, float y) { 4665 Layout layout = mTextView.getLayout(); 4666 int offset; 4667 if (layout != null) { 4668 if (mPreviousLineTouched == UNSET_LINE) { 4669 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4670 } 4671 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4672 offset = getOffsetAtCoordinate(layout, currLine, x); 4673 mPreviousLineTouched = currLine; 4674 } else { 4675 offset = -1; 4676 } 4677 positionAtCursorOffset(offset, false); 4678 if (mTextActionMode != null) { 4679 invalidateActionModeAsync(); 4680 } 4681 } 4682 4683 @Override 4684 void onHandleMoved() { 4685 super.onHandleMoved(); 4686 removeHiderCallback(); 4687 } 4688 4689 @Override 4690 public void onDetached() { 4691 super.onDetached(); 4692 removeHiderCallback(); 4693 } 4694 } 4695 4696 @Retention(RetentionPolicy.SOURCE) 4697 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4698 public @interface HandleType {} 4699 public static final int HANDLE_TYPE_SELECTION_START = 0; 4700 public static final int HANDLE_TYPE_SELECTION_END = 1; 4701 4702 private class SelectionHandleView extends HandleView { 4703 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4704 // end (HANDLE_TYPE_SELECTION_END). 4705 @HandleType 4706 private final int mHandleType; 4707 // Indicates whether the cursor is making adjustments within a word. 4708 private boolean mInWord = false; 4709 // Difference between touch position and word boundary position. 4710 private float mTouchWordDelta; 4711 // X value of the previous updatePosition call. 4712 private float mPrevX; 4713 // Indicates if the handle has moved a boundary between LTR and RTL text. 4714 private boolean mLanguageDirectionChanged = false; 4715 // Distance from edge of horizontally scrolling text view 4716 // to use to switch to character mode. 4717 private final float mTextViewEdgeSlop; 4718 // Used to save text view location. 4719 private final int[] mTextViewLocation = new int[2]; 4720 4721 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4722 @HandleType int handleType) { 4723 super(drawableLtr, drawableRtl, id); 4724 mHandleType = handleType; 4725 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4726 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4727 } 4728 4729 private boolean isStartHandle() { 4730 return mHandleType == HANDLE_TYPE_SELECTION_START; 4731 } 4732 4733 @Override 4734 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4735 if (isRtlRun == isStartHandle()) { 4736 return drawable.getIntrinsicWidth() / 4; 4737 } else { 4738 return (drawable.getIntrinsicWidth() * 3) / 4; 4739 } 4740 } 4741 4742 @Override 4743 protected int getHorizontalGravity(boolean isRtlRun) { 4744 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4745 } 4746 4747 @Override 4748 public int getCurrentCursorOffset() { 4749 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4750 } 4751 4752 @Override 4753 protected void updateSelection(int offset) { 4754 if (isStartHandle()) { 4755 Selection.setSelection((Spannable) mTextView.getText(), offset, 4756 mTextView.getSelectionEnd()); 4757 } else { 4758 Selection.setSelection((Spannable) mTextView.getText(), 4759 mTextView.getSelectionStart(), offset); 4760 } 4761 updateDrawable(); 4762 if (mTextActionMode != null) { 4763 invalidateActionModeAsync(); 4764 } 4765 } 4766 4767 @Override 4768 public void updatePosition(float x, float y) { 4769 final Layout layout = mTextView.getLayout(); 4770 if (layout == null) { 4771 // HandleView will deal appropriately in positionAtCursorOffset when 4772 // layout is null. 4773 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y)); 4774 return; 4775 } 4776 4777 if (mPreviousLineTouched == UNSET_LINE) { 4778 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4779 } 4780 4781 boolean positionCursor = false; 4782 final int anotherHandleOffset = 4783 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4784 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4785 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4786 4787 if (isStartHandle() && initialOffset >= anotherHandleOffset 4788 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4789 // Handles have crossed, bound it to the first selected line and 4790 // adjust by word / char as normal. 4791 currLine = getLineForOffset(layout, anotherHandleOffset, !isStartHandle()); 4792 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4793 } 4794 4795 int offset = initialOffset; 4796 final int wordEnd = getWordEnd(offset); 4797 final int wordStart = getWordStart(offset); 4798 4799 if (mPrevX == UNSET_X_VALUE) { 4800 mPrevX = x; 4801 } 4802 4803 final int currentOffset = getCurrentCursorOffset(); 4804 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4805 final boolean atRtl = isAtRtlRun(layout, offset); 4806 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4807 4808 // We can't determine if the user is expanding or shrinking the selection if they're 4809 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4810 // the cursor at the current position. 4811 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4812 // We're on a boundary or this is the first direction change -- just update 4813 // to the current position. 4814 mLanguageDirectionChanged = true; 4815 mTouchWordDelta = 0.0f; 4816 positionAndAdjustForCrossingHandles(offset); 4817 return; 4818 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4819 // We've just moved past the boundary so update the position. After this we can 4820 // figure out if the user is expanding or shrinking to go by word or character. 4821 positionAndAdjustForCrossingHandles(offset); 4822 mTouchWordDelta = 0.0f; 4823 mLanguageDirectionChanged = false; 4824 return; 4825 } 4826 4827 boolean isExpanding; 4828 final float xDiff = x - mPrevX; 4829 if (isStartHandle()) { 4830 isExpanding = currLine < mPreviousLineTouched; 4831 } else { 4832 isExpanding = currLine > mPreviousLineTouched; 4833 } 4834 if (atRtl == isStartHandle()) { 4835 isExpanding |= xDiff > 0; 4836 } else { 4837 isExpanding |= xDiff < 0; 4838 } 4839 4840 if (mTextView.getHorizontallyScrolling()) { 4841 if (positionNearEdgeOfScrollingView(x, atRtl) 4842 && ((isStartHandle() && mTextView.getScrollX() != 0) 4843 || (!isStartHandle() 4844 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4845 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4846 || (!isStartHandle() && offset > currentOffset))) 4847 || !isExpanding)) { 4848 // If we're expanding ensure that the offset is actually expanding compared to 4849 // the current offset, if the handle snapped to the word, the finger position 4850 // may be out of sync and we don't want the selection to jump back. 4851 mTouchWordDelta = 0.0f; 4852 final int nextOffset = (atRtl == isStartHandle()) 4853 ? layout.getOffsetToRightOf(mPreviousOffset) 4854 : layout.getOffsetToLeftOf(mPreviousOffset); 4855 positionAndAdjustForCrossingHandles(nextOffset); 4856 return; 4857 } 4858 } 4859 4860 if (isExpanding) { 4861 // User is increasing the selection. 4862 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4863 final boolean atLineBoundary = layout.getLineStart(currLine) == offset 4864 || layout.getLineEnd(currLine) == offset; 4865 final boolean atWordBoundary = getWordIteratorWithText().isBoundary(offset); 4866 final boolean snapToWord = !(atLineBoundary && atWordBoundary) 4867 && (!mInWord 4868 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4869 && atRtl == isAtRtlRun(layout, wordBoundary); 4870 if (snapToWord) { 4871 // Sometimes words can be broken across lines (Chinese, hyphenation). 4872 // We still snap to the word boundary but we only use the letters on the 4873 // current line to determine if the user is far enough into the word to snap. 4874 if (getLineForOffset(layout, wordBoundary) != currLine) { 4875 wordBoundary = isStartHandle() 4876 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4877 } 4878 final int offsetThresholdToSnap = isStartHandle() 4879 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4880 : wordStart + ((wordBoundary - wordStart) / 2); 4881 if (isStartHandle() 4882 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4883 // User is far enough into the word or on a different line so we expand by 4884 // word. 4885 offset = wordStart; 4886 } else if (!isStartHandle() 4887 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4888 // User is far enough into the word or on a different line so we expand by 4889 // word. 4890 offset = wordEnd; 4891 } else { 4892 offset = mPreviousOffset; 4893 } 4894 } 4895 if ((isStartHandle() && offset < initialOffset) 4896 || (!isStartHandle() && offset > initialOffset)) { 4897 final float adjustedX = getHorizontal(layout, offset); 4898 mTouchWordDelta = 4899 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4900 } else { 4901 mTouchWordDelta = 0.0f; 4902 } 4903 positionCursor = true; 4904 } else { 4905 final int adjustedOffset = 4906 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4907 final boolean shrinking = isStartHandle() 4908 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4909 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4910 if (shrinking) { 4911 // User is shrinking the selection. 4912 if (currLine != mPrevLine) { 4913 // We're on a different line, so we'll snap to word boundaries. 4914 offset = isStartHandle() ? wordStart : wordEnd; 4915 if ((isStartHandle() && offset < initialOffset) 4916 || (!isStartHandle() && offset > initialOffset)) { 4917 final float adjustedX = getHorizontal(layout, offset); 4918 mTouchWordDelta = 4919 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4920 } else { 4921 mTouchWordDelta = 0.0f; 4922 } 4923 } else { 4924 offset = adjustedOffset; 4925 } 4926 positionCursor = true; 4927 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4928 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4929 // Handle has jumped to the word boundary, and the user is moving 4930 // their finger towards the handle, the delta should be updated. 4931 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4932 - getHorizontal(layout, mPreviousOffset); 4933 } 4934 } 4935 4936 if (positionCursor) { 4937 mPreviousLineTouched = currLine; 4938 positionAndAdjustForCrossingHandles(offset); 4939 } 4940 mPrevX = x; 4941 } 4942 4943 @Override 4944 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4945 super.positionAtCursorOffset(offset, forceUpdatePosition); 4946 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 4947 } 4948 4949 @Override 4950 public boolean onTouchEvent(MotionEvent event) { 4951 boolean superResult = super.onTouchEvent(event); 4952 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 4953 // Reset the touch word offset and x value when the user 4954 // re-engages the handle. 4955 mTouchWordDelta = 0.0f; 4956 mPrevX = UNSET_X_VALUE; 4957 } 4958 return superResult; 4959 } 4960 4961 private void positionAndAdjustForCrossingHandles(int offset) { 4962 final int anotherHandleOffset = 4963 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4964 if ((isStartHandle() && offset >= anotherHandleOffset) 4965 || (!isStartHandle() && offset <= anotherHandleOffset)) { 4966 mTouchWordDelta = 0.0f; 4967 final Layout layout = mTextView.getLayout(); 4968 if (layout != null && offset != anotherHandleOffset) { 4969 final float horiz = getHorizontal(layout, offset); 4970 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 4971 !isStartHandle()); 4972 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 4973 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 4974 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 4975 // This handle passes another one as it crossed a direction boundary. 4976 // Don't minimize the selection, but keep the handle at the run boundary. 4977 final int currentOffset = getCurrentCursorOffset(); 4978 final int offsetToGetRunRange = isStartHandle() 4979 ? currentOffset : Math.max(currentOffset - 1, 0); 4980 final long range = layout.getRunRange(offsetToGetRunRange); 4981 if (isStartHandle()) { 4982 offset = TextUtils.unpackRangeStartFromLong(range); 4983 } else { 4984 offset = TextUtils.unpackRangeEndFromLong(range); 4985 } 4986 positionAtCursorOffset(offset, false); 4987 return; 4988 } 4989 } 4990 // Handles can not cross and selection is at least one character. 4991 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 4992 } 4993 positionAtCursorOffset(offset, false); 4994 } 4995 4996 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 4997 mTextView.getLocationOnScreen(mTextViewLocation); 4998 boolean nearEdge; 4999 if (atRtl == isStartHandle()) { 5000 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5001 - mTextView.getPaddingRight(); 5002 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5003 } else { 5004 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5005 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5006 } 5007 return nearEdge; 5008 } 5009 5010 @Override 5011 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5012 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5013 return layout.isRtlCharAt(offsetToCheck); 5014 } 5015 5016 @Override 5017 public float getHorizontal(@NonNull Layout layout, int offset) { 5018 return getHorizontal(layout, offset, isStartHandle()); 5019 } 5020 5021 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5022 final int line = getLineForOffset(layout, offset); 5023 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5024 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5025 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5026 return (isRtlChar == isRtlParagraph) 5027 ? layout.getPrimaryHorizontal(offset, false, startHandle) 5028 : layout.getSecondaryHorizontal(offset, false, startHandle); 5029 } 5030 5031 @Override 5032 public int getLineForOffset(@NonNull Layout layout, int offset) { 5033 return getLineForOffset(layout, offset, isStartHandle()); 5034 } 5035 5036 private int getLineForOffset(@NonNull Layout layout, int offset, boolean startHandle) { 5037 final int line = layout.getLineForOffset(offset); 5038 if (!startHandle && line > 0 && layout.getLineStart(line) == offset 5039 && mTextView.getText().charAt(offset - 1) != '\n') { 5040 // If end handle is at a line break in a paragraph, the handle should be at the 5041 // previous line. 5042 return line - 1; 5043 } 5044 return line; 5045 } 5046 5047 @Override 5048 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5049 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5050 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5051 if (!layout.isLevelBoundary(primaryOffset)) { 5052 return primaryOffset; 5053 } 5054 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5055 final int currentOffset = getCurrentCursorOffset(); 5056 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5057 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5058 if (primaryDiff < secondaryDiff) { 5059 return primaryOffset; 5060 } else if (primaryDiff > secondaryDiff) { 5061 return secondaryOffset; 5062 } else { 5063 final int offsetToCheck = isStartHandle() 5064 ? currentOffset : Math.max(currentOffset - 1, 0); 5065 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5066 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5067 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5068 } 5069 } 5070 } 5071 5072 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5073 final int trueLine = mTextView.getLineAtCoordinate(y); 5074 if (layout == null || prevLine > layout.getLineCount() 5075 || layout.getLineCount() <= 0 || prevLine < 0) { 5076 // Invalid parameters, just return whatever line is at y. 5077 return trueLine; 5078 } 5079 5080 if (Math.abs(trueLine - prevLine) >= 2) { 5081 // Only stick to lines if we're within a line of the previous selection. 5082 return trueLine; 5083 } 5084 5085 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5086 final int lineCount = layout.getLineCount(); 5087 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5088 5089 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5090 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5091 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5092 5093 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5094 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5095 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5096 5097 // Determine if we've moved lines based on y position and previous line. 5098 int currLine; 5099 if (y <= yTopBound) { 5100 currLine = Math.max(prevLine - 1, 0); 5101 } else if (y >= yBottomBound) { 5102 currLine = Math.min(prevLine + 1, lineCount - 1); 5103 } else { 5104 currLine = prevLine; 5105 } 5106 return currLine; 5107 } 5108 5109 /** 5110 * A CursorController instance can be used to control a cursor in the text. 5111 */ 5112 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5113 /** 5114 * Makes the cursor controller visible on screen. 5115 * See also {@link #hide()}. 5116 */ 5117 public void show(); 5118 5119 /** 5120 * Hide the cursor controller from screen. 5121 * See also {@link #show()}. 5122 */ 5123 public void hide(); 5124 5125 /** 5126 * Called when the view is detached from window. Perform house keeping task, such as 5127 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5128 * preventing the activity from being recycled. 5129 */ 5130 public void onDetached(); 5131 5132 public boolean isCursorBeingModified(); 5133 5134 public boolean isActive(); 5135 } 5136 5137 private class InsertionPointCursorController implements CursorController { 5138 private InsertionHandleView mHandle; 5139 5140 public void show() { 5141 getHandle().show(); 5142 5143 if (mSelectionModifierCursorController != null) { 5144 mSelectionModifierCursorController.hide(); 5145 } 5146 } 5147 5148 public void hide() { 5149 if (mHandle != null) { 5150 mHandle.hide(); 5151 } 5152 } 5153 5154 public void onTouchModeChanged(boolean isInTouchMode) { 5155 if (!isInTouchMode) { 5156 hide(); 5157 } 5158 } 5159 5160 private InsertionHandleView getHandle() { 5161 if (mSelectHandleCenter == null) { 5162 mSelectHandleCenter = mTextView.getContext().getDrawable( 5163 mTextView.mTextSelectHandleRes); 5164 } 5165 if (mHandle == null) { 5166 mHandle = new InsertionHandleView(mSelectHandleCenter); 5167 } 5168 return mHandle; 5169 } 5170 5171 @Override 5172 public void onDetached() { 5173 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5174 observer.removeOnTouchModeChangeListener(this); 5175 5176 if (mHandle != null) mHandle.onDetached(); 5177 } 5178 5179 @Override 5180 public boolean isCursorBeingModified() { 5181 return mHandle != null && mHandle.isDragging(); 5182 } 5183 5184 @Override 5185 public boolean isActive() { 5186 return mHandle != null && mHandle.isShowing(); 5187 } 5188 5189 public void invalidateHandle() { 5190 if (mHandle != null) { 5191 mHandle.invalidate(); 5192 } 5193 } 5194 } 5195 5196 class SelectionModifierCursorController implements CursorController { 5197 // The cursor controller handles, lazily created when shown. 5198 private SelectionHandleView mStartHandle; 5199 private SelectionHandleView mEndHandle; 5200 // The offsets of that last touch down event. Remembered to start selection there. 5201 private int mMinTouchOffset, mMaxTouchOffset; 5202 5203 private float mDownPositionX, mDownPositionY; 5204 private boolean mGestureStayedInTapRegion; 5205 5206 // Where the user first starts the drag motion. 5207 private int mStartOffset = -1; 5208 5209 private boolean mHaventMovedEnoughToStartDrag; 5210 // The line that a selection happened most recently with the drag accelerator. 5211 private int mLineSelectionIsOn = -1; 5212 // Whether the drag accelerator has selected past the initial line. 5213 private boolean mSwitchedLines = false; 5214 5215 // Indicates the drag accelerator mode that the user is currently using. 5216 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5217 // Drag accelerator is inactive. 5218 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5219 // Character based selection by dragging. Only for mouse. 5220 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5221 // Word based selection by dragging. Enabled after long pressing or double tapping. 5222 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5223 // Paragraph based selection by dragging. Enabled after mouse triple click. 5224 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5225 5226 SelectionModifierCursorController() { 5227 resetTouchOffsets(); 5228 } 5229 5230 public void show() { 5231 if (mTextView.isInBatchEditMode()) { 5232 return; 5233 } 5234 initDrawables(); 5235 initHandles(); 5236 } 5237 5238 private void initDrawables() { 5239 if (mSelectHandleLeft == null) { 5240 mSelectHandleLeft = mTextView.getContext().getDrawable( 5241 mTextView.mTextSelectHandleLeftRes); 5242 } 5243 if (mSelectHandleRight == null) { 5244 mSelectHandleRight = mTextView.getContext().getDrawable( 5245 mTextView.mTextSelectHandleRightRes); 5246 } 5247 } 5248 5249 private void initHandles() { 5250 // Lazy object creation has to be done before updatePosition() is called. 5251 if (mStartHandle == null) { 5252 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5253 com.android.internal.R.id.selection_start_handle, 5254 HANDLE_TYPE_SELECTION_START); 5255 } 5256 if (mEndHandle == null) { 5257 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5258 com.android.internal.R.id.selection_end_handle, 5259 HANDLE_TYPE_SELECTION_END); 5260 } 5261 5262 mStartHandle.show(); 5263 mEndHandle.show(); 5264 5265 hideInsertionPointCursorController(); 5266 } 5267 5268 public void hide() { 5269 if (mStartHandle != null) mStartHandle.hide(); 5270 if (mEndHandle != null) mEndHandle.hide(); 5271 } 5272 5273 public void enterDrag(int dragAcceleratorMode) { 5274 // Just need to init the handles / hide insertion cursor. 5275 show(); 5276 mDragAcceleratorMode = dragAcceleratorMode; 5277 // Start location of selection. 5278 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5279 mLastDownPositionY); 5280 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5281 // Don't show the handles until user has lifted finger. 5282 hide(); 5283 5284 // This stops scrolling parents from intercepting the touch event, allowing 5285 // the user to continue dragging across the screen to select text; TextView will 5286 // scroll as necessary. 5287 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5288 mTextView.cancelLongPress(); 5289 } 5290 5291 public void onTouchEvent(MotionEvent event) { 5292 // This is done even when the View does not have focus, so that long presses can start 5293 // selection and tap can move cursor from this tap position. 5294 final float eventX = event.getX(); 5295 final float eventY = event.getY(); 5296 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5297 switch (event.getActionMasked()) { 5298 case MotionEvent.ACTION_DOWN: 5299 if (extractedTextModeWillBeStarted()) { 5300 // Prevent duplicating the selection handles until the mode starts. 5301 hide(); 5302 } else { 5303 // Remember finger down position, to be able to start selection from there. 5304 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5305 eventX, eventY); 5306 5307 // Double tap detection 5308 if (mGestureStayedInTapRegion) { 5309 if (mTapState == TAP_STATE_DOUBLE_TAP 5310 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5311 final float deltaX = eventX - mDownPositionX; 5312 final float deltaY = eventY - mDownPositionY; 5313 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5314 5315 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5316 mTextView.getContext()); 5317 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5318 boolean stayedInArea = 5319 distanceSquared < doubleTapSlop * doubleTapSlop; 5320 5321 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5322 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5323 selectCurrentWordAndStartDrag(); 5324 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5325 selectCurrentParagraphAndStartDrag(); 5326 } 5327 mDiscardNextActionUp = true; 5328 } 5329 } 5330 } 5331 5332 mDownPositionX = eventX; 5333 mDownPositionY = eventY; 5334 mGestureStayedInTapRegion = true; 5335 mHaventMovedEnoughToStartDrag = true; 5336 } 5337 break; 5338 5339 case MotionEvent.ACTION_POINTER_DOWN: 5340 case MotionEvent.ACTION_POINTER_UP: 5341 // Handle multi-point gestures. Keep min and max offset positions. 5342 // Only activated for devices that correctly handle multi-touch. 5343 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5344 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5345 updateMinAndMaxOffsets(event); 5346 } 5347 break; 5348 5349 case MotionEvent.ACTION_MOVE: 5350 final ViewConfiguration viewConfig = ViewConfiguration.get( 5351 mTextView.getContext()); 5352 final int touchSlop = viewConfig.getScaledTouchSlop(); 5353 5354 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5355 final float deltaX = eventX - mDownPositionX; 5356 final float deltaY = eventY - mDownPositionY; 5357 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5358 5359 if (mGestureStayedInTapRegion) { 5360 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5361 mGestureStayedInTapRegion = 5362 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5363 } 5364 if (mHaventMovedEnoughToStartDrag) { 5365 // We don't start dragging until the user has moved enough. 5366 mHaventMovedEnoughToStartDrag = 5367 distanceSquared <= touchSlop * touchSlop; 5368 } 5369 } 5370 5371 if (isMouse && !isDragAcceleratorActive()) { 5372 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5373 if (mTextView.hasSelection() 5374 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5375 && offset >= mTextView.getSelectionStart() 5376 && offset <= mTextView.getSelectionEnd()) { 5377 startDragAndDrop(); 5378 break; 5379 } 5380 5381 if (mStartOffset != offset) { 5382 // Start character based drag accelerator. 5383 stopTextActionMode(); 5384 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5385 mDiscardNextActionUp = true; 5386 mHaventMovedEnoughToStartDrag = false; 5387 } 5388 } 5389 5390 if (mStartHandle != null && mStartHandle.isShowing()) { 5391 // Don't do the drag if the handles are showing already. 5392 break; 5393 } 5394 5395 updateSelection(event); 5396 break; 5397 5398 case MotionEvent.ACTION_UP: 5399 if (!isDragAcceleratorActive()) { 5400 break; 5401 } 5402 updateSelection(event); 5403 5404 // No longer dragging to select text, let the parent intercept events. 5405 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5406 5407 // No longer the first dragging motion, reset. 5408 resetDragAcceleratorState(); 5409 5410 if (mTextView.hasSelection()) { 5411 // Do not invoke the text assistant if this was a drag selection. 5412 if (mHaventMovedEnoughToStartDrag) { 5413 startSelectionActionModeAsync(); 5414 } else { 5415 startSelectionActionMode(); 5416 } 5417 5418 } 5419 break; 5420 } 5421 } 5422 5423 private void updateSelection(MotionEvent event) { 5424 if (mTextView.getLayout() != null) { 5425 switch (mDragAcceleratorMode) { 5426 case DRAG_ACCELERATOR_MODE_CHARACTER: 5427 updateCharacterBasedSelection(event); 5428 break; 5429 case DRAG_ACCELERATOR_MODE_WORD: 5430 updateWordBasedSelection(event); 5431 break; 5432 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5433 updateParagraphBasedSelection(event); 5434 break; 5435 } 5436 } 5437 } 5438 5439 /** 5440 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5441 * 5442 * @return true if the drag was started. 5443 */ 5444 private boolean selectCurrentParagraphAndStartDrag() { 5445 if (mInsertionActionModeRunnable != null) { 5446 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5447 } 5448 stopTextActionMode(); 5449 if (!selectCurrentParagraph()) { 5450 return false; 5451 } 5452 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5453 return true; 5454 } 5455 5456 private void updateCharacterBasedSelection(MotionEvent event) { 5457 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5458 Selection.setSelection((Spannable) mTextView.getText(), mStartOffset, offset); 5459 } 5460 5461 private void updateWordBasedSelection(MotionEvent event) { 5462 if (mHaventMovedEnoughToStartDrag) { 5463 return; 5464 } 5465 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5466 final ViewConfiguration viewConfig = ViewConfiguration.get( 5467 mTextView.getContext()); 5468 final float eventX = event.getX(); 5469 final float eventY = event.getY(); 5470 final int currLine; 5471 if (isMouse) { 5472 // No need to offset the y coordinate for mouse input. 5473 currLine = mTextView.getLineAtCoordinate(eventY); 5474 } else { 5475 float y = eventY; 5476 if (mSwitchedLines) { 5477 // Offset the finger by the same vertical offset as the handles. 5478 // This improves visibility of the content being selected by 5479 // shifting the finger below the content, this is applied once 5480 // the user has switched lines. 5481 final int touchSlop = viewConfig.getScaledTouchSlop(); 5482 final float fingerOffset = (mStartHandle != null) 5483 ? mStartHandle.getIdealVerticalOffset() 5484 : touchSlop; 5485 y = eventY - fingerOffset; 5486 } 5487 5488 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5489 y); 5490 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5491 // Break early here, we want to offset the finger position from 5492 // the selection highlight, once the user moved their finger 5493 // to a different line we should apply the offset and *not* switch 5494 // lines until recomputing the position with the finger offset. 5495 mSwitchedLines = true; 5496 return; 5497 } 5498 } 5499 5500 int startOffset; 5501 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5502 // Snap to word boundaries. 5503 if (mStartOffset < offset) { 5504 // Expanding with end handle. 5505 offset = getWordEnd(offset); 5506 startOffset = getWordStart(mStartOffset); 5507 } else { 5508 // Expanding with start handle. 5509 offset = getWordStart(offset); 5510 startOffset = getWordEnd(mStartOffset); 5511 if (startOffset == offset) { 5512 offset = getNextCursorOffset(offset, false); 5513 } 5514 } 5515 mLineSelectionIsOn = currLine; 5516 Selection.setSelection((Spannable) mTextView.getText(), startOffset, offset); 5517 } 5518 5519 private void updateParagraphBasedSelection(MotionEvent event) { 5520 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5521 5522 final int start = Math.min(offset, mStartOffset); 5523 final int end = Math.max(offset, mStartOffset); 5524 final long paragraphsRange = getParagraphsRange(start, end); 5525 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5526 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5527 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5528 } 5529 5530 /** 5531 * @param event 5532 */ 5533 private void updateMinAndMaxOffsets(MotionEvent event) { 5534 int pointerCount = event.getPointerCount(); 5535 for (int index = 0; index < pointerCount; index++) { 5536 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5537 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5538 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5539 } 5540 } 5541 5542 public int getMinTouchOffset() { 5543 return mMinTouchOffset; 5544 } 5545 5546 public int getMaxTouchOffset() { 5547 return mMaxTouchOffset; 5548 } 5549 5550 public void resetTouchOffsets() { 5551 mMinTouchOffset = mMaxTouchOffset = -1; 5552 resetDragAcceleratorState(); 5553 } 5554 5555 private void resetDragAcceleratorState() { 5556 mStartOffset = -1; 5557 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5558 mSwitchedLines = false; 5559 final int selectionStart = mTextView.getSelectionStart(); 5560 final int selectionEnd = mTextView.getSelectionEnd(); 5561 if (selectionStart > selectionEnd) { 5562 Selection.setSelection((Spannable) mTextView.getText(), 5563 selectionEnd, selectionStart); 5564 } 5565 } 5566 5567 /** 5568 * @return true iff this controller is currently used to move the selection start. 5569 */ 5570 public boolean isSelectionStartDragged() { 5571 return mStartHandle != null && mStartHandle.isDragging(); 5572 } 5573 5574 @Override 5575 public boolean isCursorBeingModified() { 5576 return isDragAcceleratorActive() || isSelectionStartDragged() 5577 || (mEndHandle != null && mEndHandle.isDragging()); 5578 } 5579 5580 /** 5581 * @return true if the user is selecting text using the drag accelerator. 5582 */ 5583 public boolean isDragAcceleratorActive() { 5584 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5585 } 5586 5587 public void onTouchModeChanged(boolean isInTouchMode) { 5588 if (!isInTouchMode) { 5589 hide(); 5590 } 5591 } 5592 5593 @Override 5594 public void onDetached() { 5595 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5596 observer.removeOnTouchModeChangeListener(this); 5597 5598 if (mStartHandle != null) mStartHandle.onDetached(); 5599 if (mEndHandle != null) mEndHandle.onDetached(); 5600 } 5601 5602 @Override 5603 public boolean isActive() { 5604 return mStartHandle != null && mStartHandle.isShowing(); 5605 } 5606 5607 public void invalidateHandles() { 5608 if (mStartHandle != null) { 5609 mStartHandle.invalidate(); 5610 } 5611 if (mEndHandle != null) { 5612 mEndHandle.invalidate(); 5613 } 5614 } 5615 } 5616 5617 private class CorrectionHighlighter { 5618 private final Path mPath = new Path(); 5619 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5620 private int mStart, mEnd; 5621 private long mFadingStartTime; 5622 private RectF mTempRectF; 5623 private static final int FADE_OUT_DURATION = 400; 5624 5625 public CorrectionHighlighter() { 5626 mPaint.setCompatibilityScaling( 5627 mTextView.getResources().getCompatibilityInfo().applicationScale); 5628 mPaint.setStyle(Paint.Style.FILL); 5629 } 5630 5631 public void highlight(CorrectionInfo info) { 5632 mStart = info.getOffset(); 5633 mEnd = mStart + info.getNewText().length(); 5634 mFadingStartTime = SystemClock.uptimeMillis(); 5635 5636 if (mStart < 0 || mEnd < 0) { 5637 stopAnimation(); 5638 } 5639 } 5640 5641 public void draw(Canvas canvas, int cursorOffsetVertical) { 5642 if (updatePath() && updatePaint()) { 5643 if (cursorOffsetVertical != 0) { 5644 canvas.translate(0, cursorOffsetVertical); 5645 } 5646 5647 canvas.drawPath(mPath, mPaint); 5648 5649 if (cursorOffsetVertical != 0) { 5650 canvas.translate(0, -cursorOffsetVertical); 5651 } 5652 invalidate(true); // TODO invalidate cursor region only 5653 } else { 5654 stopAnimation(); 5655 invalidate(false); // TODO invalidate cursor region only 5656 } 5657 } 5658 5659 private boolean updatePaint() { 5660 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5661 if (duration > FADE_OUT_DURATION) return false; 5662 5663 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5664 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5665 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5666 + ((int) (highlightColorAlpha * coef) << 24); 5667 mPaint.setColor(color); 5668 return true; 5669 } 5670 5671 private boolean updatePath() { 5672 final Layout layout = mTextView.getLayout(); 5673 if (layout == null) return false; 5674 5675 // Update in case text is edited while the animation is run 5676 final int length = mTextView.getText().length(); 5677 int start = Math.min(length, mStart); 5678 int end = Math.min(length, mEnd); 5679 5680 mPath.reset(); 5681 layout.getSelectionPath(start, end, mPath); 5682 return true; 5683 } 5684 5685 private void invalidate(boolean delayed) { 5686 if (mTextView.getLayout() == null) return; 5687 5688 if (mTempRectF == null) mTempRectF = new RectF(); 5689 mPath.computeBounds(mTempRectF, false); 5690 5691 int left = mTextView.getCompoundPaddingLeft(); 5692 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5693 5694 if (delayed) { 5695 mTextView.postInvalidateOnAnimation( 5696 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5697 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5698 } else { 5699 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5700 (int) mTempRectF.right, (int) mTempRectF.bottom); 5701 } 5702 } 5703 5704 private void stopAnimation() { 5705 Editor.this.mCorrectionHighlighter = null; 5706 } 5707 } 5708 5709 private static class ErrorPopup extends PopupWindow { 5710 private boolean mAbove = false; 5711 private final TextView mView; 5712 private int mPopupInlineErrorBackgroundId = 0; 5713 private int mPopupInlineErrorAboveBackgroundId = 0; 5714 5715 ErrorPopup(TextView v, int width, int height) { 5716 super(v, width, height); 5717 mView = v; 5718 // Make sure the TextView has a background set as it will be used the first time it is 5719 // shown and positioned. Initialized with below background, which should have 5720 // dimensions identical to the above version for this to work (and is more likely). 5721 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5722 com.android.internal.R.styleable.Theme_errorMessageBackground); 5723 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5724 } 5725 5726 void fixDirection(boolean above) { 5727 mAbove = above; 5728 5729 if (above) { 5730 mPopupInlineErrorAboveBackgroundId = 5731 getResourceId(mPopupInlineErrorAboveBackgroundId, 5732 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5733 } else { 5734 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5735 com.android.internal.R.styleable.Theme_errorMessageBackground); 5736 } 5737 5738 mView.setBackgroundResource( 5739 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5740 } 5741 5742 private int getResourceId(int currentId, int index) { 5743 if (currentId == 0) { 5744 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5745 R.styleable.Theme); 5746 currentId = styledAttributes.getResourceId(index, 0); 5747 styledAttributes.recycle(); 5748 } 5749 return currentId; 5750 } 5751 5752 @Override 5753 public void update(int x, int y, int w, int h, boolean force) { 5754 super.update(x, y, w, h, force); 5755 5756 boolean above = isAboveAnchor(); 5757 if (above != mAbove) { 5758 fixDirection(above); 5759 } 5760 } 5761 } 5762 5763 static class InputContentType { 5764 int imeOptions = EditorInfo.IME_NULL; 5765 String privateImeOptions; 5766 CharSequence imeActionLabel; 5767 int imeActionId; 5768 Bundle extras; 5769 OnEditorActionListener onEditorActionListener; 5770 boolean enterDown; 5771 LocaleList imeHintLocales; 5772 } 5773 5774 static class InputMethodState { 5775 ExtractedTextRequest mExtractedTextRequest; 5776 final ExtractedText mExtractedText = new ExtractedText(); 5777 int mBatchEditNesting; 5778 boolean mCursorChanged; 5779 boolean mSelectionModeChanged; 5780 boolean mContentChanged; 5781 int mChangedStart, mChangedEnd, mChangedDelta; 5782 } 5783 5784 /** 5785 * @return True iff (start, end) is a valid range within the text. 5786 */ 5787 private static boolean isValidRange(CharSequence text, int start, int end) { 5788 return 0 <= start && start <= end && end <= text.length(); 5789 } 5790 5791 @VisibleForTesting 5792 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5793 return mSuggestionsPopupWindow; 5794 } 5795 5796 /** 5797 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5798 * text being typed (and hence always returns null from the filter() method). 5799 * 5800 * TODO: Make this span aware. 5801 */ 5802 public static class UndoInputFilter implements InputFilter { 5803 private final Editor mEditor; 5804 5805 // Whether the current filter pass is directly caused by an end-user text edit. 5806 private boolean mIsUserEdit; 5807 5808 // Whether the text field is handling an IME composition. Must be parceled in case the user 5809 // rotates the screen during composition. 5810 private boolean mHasComposition; 5811 5812 // Whether the user is expanding or shortening the text 5813 private boolean mExpanding; 5814 5815 // Whether the previous edit operation was in the current batch edit. 5816 private boolean mPreviousOperationWasInSameBatchEdit; 5817 5818 public UndoInputFilter(Editor editor) { 5819 mEditor = editor; 5820 } 5821 5822 public void saveInstanceState(Parcel parcel) { 5823 parcel.writeInt(mIsUserEdit ? 1 : 0); 5824 parcel.writeInt(mHasComposition ? 1 : 0); 5825 parcel.writeInt(mExpanding ? 1 : 0); 5826 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5827 } 5828 5829 public void restoreInstanceState(Parcel parcel) { 5830 mIsUserEdit = parcel.readInt() != 0; 5831 mHasComposition = parcel.readInt() != 0; 5832 mExpanding = parcel.readInt() != 0; 5833 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5834 } 5835 5836 /** 5837 * Signals that a user-triggered edit is starting. 5838 */ 5839 public void beginBatchEdit() { 5840 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5841 mIsUserEdit = true; 5842 } 5843 5844 public void endBatchEdit() { 5845 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5846 mIsUserEdit = false; 5847 mPreviousOperationWasInSameBatchEdit = false; 5848 } 5849 5850 @Override 5851 public CharSequence filter(CharSequence source, int start, int end, 5852 Spanned dest, int dstart, int dend) { 5853 if (DEBUG_UNDO) { 5854 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 5855 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5856 } 5857 5858 // Check to see if this edit should be tracked for undo. 5859 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5860 return null; 5861 } 5862 5863 final boolean hadComposition = mHasComposition; 5864 mHasComposition = isComposition(source); 5865 final boolean wasExpanding = mExpanding; 5866 boolean shouldCreateSeparateState = false; 5867 if ((end - start) != (dend - dstart)) { 5868 mExpanding = (end - start) > (dend - dstart); 5869 if (hadComposition && mExpanding != wasExpanding) { 5870 shouldCreateSeparateState = true; 5871 } 5872 } 5873 5874 // Handle edit. 5875 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5876 return null; 5877 } 5878 5879 void freezeLastEdit() { 5880 mEditor.mUndoManager.beginUpdate("Edit text"); 5881 EditOperation lastEdit = getLastEdit(); 5882 if (lastEdit != null) { 5883 lastEdit.mFrozen = true; 5884 } 5885 mEditor.mUndoManager.endUpdate(); 5886 } 5887 5888 @Retention(RetentionPolicy.SOURCE) 5889 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5890 private @interface MergeMode {} 5891 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5892 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5893 /** Use {@link EditOperation#mergeWith} to merge */ 5894 private static final int MERGE_EDIT_MODE_NORMAL = 2; 5895 5896 private void handleEdit(CharSequence source, int start, int end, 5897 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5898 // An application may install a TextWatcher to provide additional modifications after 5899 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5900 // string). This results in multiple filter() calls for what the user considers to be 5901 // a single operation. Always undo the whole set of changes in one step. 5902 @MergeMode 5903 final int mergeMode; 5904 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5905 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5906 } else if (shouldCreateSeparateState) { 5907 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5908 } else { 5909 mergeMode = MERGE_EDIT_MODE_NORMAL; 5910 } 5911 // Build a new operation with all the information from this edit. 5912 String newText = TextUtils.substring(source, start, end); 5913 String oldText = TextUtils.substring(dest, dstart, dend); 5914 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5915 mHasComposition); 5916 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5917 return; 5918 } 5919 recordEdit(edit, mergeMode); 5920 } 5921 5922 private EditOperation getLastEdit() { 5923 final UndoManager um = mEditor.mUndoManager; 5924 return um.getLastOperation( 5925 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5926 } 5927 /** 5928 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5929 * If forceMerge is true then the new edit is always merged. 5930 */ 5931 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5932 // Fetch the last edit operation and attempt to merge in the new edit. 5933 final UndoManager um = mEditor.mUndoManager; 5934 um.beginUpdate("Edit text"); 5935 EditOperation lastEdit = getLastEdit(); 5936 if (lastEdit == null) { 5937 // Add this as the first edit. 5938 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5939 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5940 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5941 // Forced merges take priority because they could be the result of a non-user-edit 5942 // change and this case should not create a new undo operation. 5943 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5944 lastEdit.forceMergeWith(edit); 5945 } else if (!mIsUserEdit) { 5946 // An application directly modified the Editable outside of a text edit. Treat this 5947 // as a new change and don't attempt to merge. 5948 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5949 um.commitState(mEditor.mUndoOwner); 5950 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5951 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 5952 // Merge succeeded, nothing else to do. 5953 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5954 } else { 5955 // Could not merge with the last edit, so commit the last edit and add this edit. 5956 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5957 um.commitState(mEditor.mUndoOwner); 5958 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5959 } 5960 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 5961 um.endUpdate(); 5962 } 5963 5964 private boolean canUndoEdit(CharSequence source, int start, int end, 5965 Spanned dest, int dstart, int dend) { 5966 if (!mEditor.mAllowUndo) { 5967 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5968 return false; 5969 } 5970 5971 if (mEditor.mUndoManager.isInUndo()) { 5972 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5973 return false; 5974 } 5975 5976 // Text filters run before input operations are applied. However, some input operations 5977 // are invalid and will throw exceptions when applied. This is common in tests. Don't 5978 // attempt to undo invalid operations. 5979 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 5980 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 5981 return false; 5982 } 5983 5984 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 5985 // on an input field. Skip no-op changes. 5986 if (start == end && dstart == dend) { 5987 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 5988 return false; 5989 } 5990 5991 return true; 5992 } 5993 5994 private static boolean isComposition(CharSequence source) { 5995 if (!(source instanceof Spannable)) { 5996 return false; 5997 } 5998 // This is a composition edit if the source has a non-zero-length composing span. 5999 Spannable text = (Spannable) source; 6000 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6001 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6002 return composeBegin < composeEnd; 6003 } 6004 6005 private boolean isInTextWatcher() { 6006 CharSequence text = mEditor.mTextView.getText(); 6007 return (text instanceof SpannableStringBuilder) 6008 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6009 } 6010 } 6011 6012 /** 6013 * An operation to undo a single "edit" to a text view. 6014 */ 6015 public static class EditOperation extends UndoOperation<Editor> { 6016 private static final int TYPE_INSERT = 0; 6017 private static final int TYPE_DELETE = 1; 6018 private static final int TYPE_REPLACE = 2; 6019 6020 private int mType; 6021 private String mOldText; 6022 private String mNewText; 6023 private int mStart; 6024 6025 private int mOldCursorPos; 6026 private int mNewCursorPos; 6027 private boolean mFrozen; 6028 private boolean mIsComposition; 6029 6030 /** 6031 * Constructs an edit operation from a text input operation on editor that replaces the 6032 * oldText starting at dstart with newText. 6033 */ 6034 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6035 boolean isComposition) { 6036 super(editor.mUndoOwner); 6037 mOldText = oldText; 6038 mNewText = newText; 6039 6040 // Determine the type of the edit. 6041 if (mNewText.length() > 0 && mOldText.length() == 0) { 6042 mType = TYPE_INSERT; 6043 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6044 mType = TYPE_DELETE; 6045 } else { 6046 mType = TYPE_REPLACE; 6047 } 6048 6049 mStart = dstart; 6050 // Store cursor data. 6051 mOldCursorPos = editor.mTextView.getSelectionStart(); 6052 mNewCursorPos = dstart + mNewText.length(); 6053 mIsComposition = isComposition; 6054 } 6055 6056 public EditOperation(Parcel src, ClassLoader loader) { 6057 super(src, loader); 6058 mType = src.readInt(); 6059 mOldText = src.readString(); 6060 mNewText = src.readString(); 6061 mStart = src.readInt(); 6062 mOldCursorPos = src.readInt(); 6063 mNewCursorPos = src.readInt(); 6064 mFrozen = src.readInt() == 1; 6065 mIsComposition = src.readInt() == 1; 6066 } 6067 6068 @Override 6069 public void writeToParcel(Parcel dest, int flags) { 6070 dest.writeInt(mType); 6071 dest.writeString(mOldText); 6072 dest.writeString(mNewText); 6073 dest.writeInt(mStart); 6074 dest.writeInt(mOldCursorPos); 6075 dest.writeInt(mNewCursorPos); 6076 dest.writeInt(mFrozen ? 1 : 0); 6077 dest.writeInt(mIsComposition ? 1 : 0); 6078 } 6079 6080 private int getNewTextEnd() { 6081 return mStart + mNewText.length(); 6082 } 6083 6084 private int getOldTextEnd() { 6085 return mStart + mOldText.length(); 6086 } 6087 6088 @Override 6089 public void commit() { 6090 } 6091 6092 @Override 6093 public void undo() { 6094 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6095 // Remove the new text and insert the old. 6096 Editor editor = getOwnerData(); 6097 Editable text = (Editable) editor.mTextView.getText(); 6098 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6099 } 6100 6101 @Override 6102 public void redo() { 6103 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6104 // Remove the old text and insert the new. 6105 Editor editor = getOwnerData(); 6106 Editable text = (Editable) editor.mTextView.getText(); 6107 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6108 } 6109 6110 /** 6111 * Attempts to merge this existing operation with a new edit. 6112 * @param edit The new edit operation. 6113 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6114 * object unchanged. 6115 */ 6116 private boolean mergeWith(EditOperation edit) { 6117 if (DEBUG_UNDO) { 6118 Log.d(TAG, "mergeWith old " + this); 6119 Log.d(TAG, "mergeWith new " + edit); 6120 } 6121 6122 if (mFrozen) { 6123 return false; 6124 } 6125 6126 switch (mType) { 6127 case TYPE_INSERT: 6128 return mergeInsertWith(edit); 6129 case TYPE_DELETE: 6130 return mergeDeleteWith(edit); 6131 case TYPE_REPLACE: 6132 return mergeReplaceWith(edit); 6133 default: 6134 return false; 6135 } 6136 } 6137 6138 private boolean mergeInsertWith(EditOperation edit) { 6139 if (edit.mType == TYPE_INSERT) { 6140 // Merge insertions that are contiguous even when it's frozen. 6141 if (getNewTextEnd() != edit.mStart) { 6142 return false; 6143 } 6144 mNewText += edit.mNewText; 6145 mNewCursorPos = edit.mNewCursorPos; 6146 mFrozen = edit.mFrozen; 6147 mIsComposition = edit.mIsComposition; 6148 return true; 6149 } 6150 if (mIsComposition && edit.mType == TYPE_REPLACE 6151 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6152 // Merge insertion with replace as they can be single insertion. 6153 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6154 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6155 mNewCursorPos = edit.mNewCursorPos; 6156 mIsComposition = edit.mIsComposition; 6157 return true; 6158 } 6159 return false; 6160 } 6161 6162 // TODO: Support forward delete. 6163 private boolean mergeDeleteWith(EditOperation edit) { 6164 // Only merge continuous deletes. 6165 if (edit.mType != TYPE_DELETE) { 6166 return false; 6167 } 6168 // Only merge deletions that are contiguous. 6169 if (mStart != edit.getOldTextEnd()) { 6170 return false; 6171 } 6172 mStart = edit.mStart; 6173 mOldText = edit.mOldText + mOldText; 6174 mNewCursorPos = edit.mNewCursorPos; 6175 mIsComposition = edit.mIsComposition; 6176 return true; 6177 } 6178 6179 private boolean mergeReplaceWith(EditOperation edit) { 6180 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6181 // Merge with adjacent insert. 6182 mNewText += edit.mNewText; 6183 mNewCursorPos = edit.mNewCursorPos; 6184 return true; 6185 } 6186 if (!mIsComposition) { 6187 return false; 6188 } 6189 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6190 && getNewTextEnd() >= edit.getOldTextEnd()) { 6191 // Merge with delete as they can be single operation. 6192 mNewText = mNewText.substring(0, edit.mStart - mStart) 6193 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6194 if (mNewText.isEmpty()) { 6195 mType = TYPE_DELETE; 6196 } 6197 mNewCursorPos = edit.mNewCursorPos; 6198 mIsComposition = edit.mIsComposition; 6199 return true; 6200 } 6201 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6202 && TextUtils.equals(mNewText, edit.mOldText)) { 6203 // Merge with the replace that replaces the same region. 6204 mNewText = edit.mNewText; 6205 mNewCursorPos = edit.mNewCursorPos; 6206 mIsComposition = edit.mIsComposition; 6207 return true; 6208 } 6209 return false; 6210 } 6211 6212 /** 6213 * Forcibly creates a single merged edit operation by simulating the entire text 6214 * contents being replaced. 6215 */ 6216 public void forceMergeWith(EditOperation edit) { 6217 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6218 if (mergeWith(edit)) { 6219 return; 6220 } 6221 Editor editor = getOwnerData(); 6222 6223 // Copy the text of the current field. 6224 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6225 // but would require two parallel implementations of modifyText() because Editable and 6226 // StringBuilder do not share an interface for replace/delete/insert. 6227 Editable editable = (Editable) editor.mTextView.getText(); 6228 Editable originalText = new SpannableStringBuilder(editable.toString()); 6229 6230 // Roll back the last operation. 6231 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6232 6233 // Clone the text again and apply the new operation. 6234 Editable finalText = new SpannableStringBuilder(editable.toString()); 6235 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6236 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6237 6238 // Convert this operation into a replace operation. 6239 mType = TYPE_REPLACE; 6240 mNewText = finalText.toString(); 6241 mOldText = originalText.toString(); 6242 mStart = 0; 6243 mNewCursorPos = edit.mNewCursorPos; 6244 mIsComposition = edit.mIsComposition; 6245 // mOldCursorPos is unchanged. 6246 } 6247 6248 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6249 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6250 // Apply the edit if it is still valid. 6251 if (isValidRange(text, deleteFrom, deleteTo) 6252 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6253 if (deleteFrom != deleteTo) { 6254 text.delete(deleteFrom, deleteTo); 6255 } 6256 if (newText.length() != 0) { 6257 text.insert(newTextInsertAt, newText); 6258 } 6259 } 6260 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6261 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6262 // TODO: Select all the text that was undone. 6263 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6264 Selection.setSelection(text, newCursorPos); 6265 } 6266 } 6267 6268 private String getTypeString() { 6269 switch (mType) { 6270 case TYPE_INSERT: 6271 return "insert"; 6272 case TYPE_DELETE: 6273 return "delete"; 6274 case TYPE_REPLACE: 6275 return "replace"; 6276 default: 6277 return ""; 6278 } 6279 } 6280 6281 @Override 6282 public String toString() { 6283 return "[mType=" + getTypeString() + ", " 6284 + "mOldText=" + mOldText + ", " 6285 + "mNewText=" + mNewText + ", " 6286 + "mStart=" + mStart + ", " 6287 + "mOldCursorPos=" + mOldCursorPos + ", " 6288 + "mNewCursorPos=" + mNewCursorPos + ", " 6289 + "mFrozen=" + mFrozen + ", " 6290 + "mIsComposition=" + mIsComposition + "]"; 6291 } 6292 6293 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6294 new Parcelable.ClassLoaderCreator<EditOperation>() { 6295 @Override 6296 public EditOperation createFromParcel(Parcel in) { 6297 return new EditOperation(in, null); 6298 } 6299 6300 @Override 6301 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6302 return new EditOperation(in, loader); 6303 } 6304 6305 @Override 6306 public EditOperation[] newArray(int size) { 6307 return new EditOperation[size]; 6308 } 6309 }; 6310 } 6311 6312 /** 6313 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6314 * These allow external applications to plug into currently selected text. 6315 */ 6316 static final class ProcessTextIntentActionsHandler { 6317 6318 private final Editor mEditor; 6319 private final TextView mTextView; 6320 private final Context mContext; 6321 private final PackageManager mPackageManager; 6322 private final String mPackageName; 6323 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6324 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6325 new SparseArray<>(); 6326 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6327 6328 private ProcessTextIntentActionsHandler(Editor editor) { 6329 mEditor = Preconditions.checkNotNull(editor); 6330 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6331 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6332 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6333 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6334 } 6335 6336 /** 6337 * Adds "PROCESS_TEXT" menu items to the specified menu. 6338 */ 6339 public void onInitializeMenu(Menu menu) { 6340 int i = 0; 6341 loadSupportedActivities(); 6342 for (ResolveInfo resolveInfo : mSupportedActivities) { 6343 menu.add(Menu.NONE, Menu.NONE, 6344 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6345 getLabel(resolveInfo)) 6346 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6347 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6348 } 6349 } 6350 6351 /** 6352 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6353 * menu item. 6354 * 6355 * @return True if the action was performed, false otherwise. 6356 */ 6357 public boolean performMenuItemAction(MenuItem item) { 6358 return fireIntent(item.getIntent()); 6359 } 6360 6361 /** 6362 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6363 */ 6364 public void initializeAccessibilityActions() { 6365 mAccessibilityIntents.clear(); 6366 mAccessibilityActions.clear(); 6367 int i = 0; 6368 loadSupportedActivities(); 6369 for (ResolveInfo resolveInfo : mSupportedActivities) { 6370 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6371 mAccessibilityActions.put( 6372 actionId, 6373 new AccessibilityNodeInfo.AccessibilityAction( 6374 actionId, getLabel(resolveInfo))); 6375 mAccessibilityIntents.put( 6376 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6377 } 6378 } 6379 6380 /** 6381 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6382 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6383 * latest accessibility actions available for this call. 6384 */ 6385 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6386 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6387 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6388 } 6389 } 6390 6391 /** 6392 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6393 * accessibility action id. 6394 * 6395 * @return True if the action was performed, false otherwise. 6396 */ 6397 public boolean performAccessibilityAction(int actionId) { 6398 return fireIntent(mAccessibilityIntents.get(actionId)); 6399 } 6400 6401 private boolean fireIntent(Intent intent) { 6402 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6403 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 6404 mEditor.mPreserveSelection = true; 6405 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6406 return true; 6407 } 6408 return false; 6409 } 6410 6411 private void loadSupportedActivities() { 6412 mSupportedActivities.clear(); 6413 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6414 List<ResolveInfo> unfiltered = 6415 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6416 for (ResolveInfo info : unfiltered) { 6417 if (isSupportedActivity(info)) { 6418 mSupportedActivities.add(info); 6419 } 6420 } 6421 } 6422 6423 private boolean isSupportedActivity(ResolveInfo info) { 6424 return mPackageName.equals(info.activityInfo.packageName) 6425 || info.activityInfo.exported 6426 && (info.activityInfo.permission == null 6427 || mContext.checkSelfPermission(info.activityInfo.permission) 6428 == PackageManager.PERMISSION_GRANTED); 6429 } 6430 6431 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6432 return createProcessTextIntent() 6433 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6434 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6435 } 6436 6437 private Intent createProcessTextIntent() { 6438 return new Intent() 6439 .setAction(Intent.ACTION_PROCESS_TEXT) 6440 .setType("text/plain"); 6441 } 6442 6443 private CharSequence getLabel(ResolveInfo resolveInfo) { 6444 return resolveInfo.loadLabel(mPackageManager); 6445 } 6446 } 6447} 6448