Editor.java revision b9bbbb1d97adb8ffdda2af14921401aabcec8cdd
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.content.UndoManager; 20import android.content.UndoOperation; 21import android.content.UndoOwner; 22import android.os.Build; 23import android.os.Parcel; 24import android.os.Parcelable; 25import android.text.InputFilter; 26import com.android.internal.util.ArrayUtils; 27import com.android.internal.util.GrowingArrayUtils; 28import com.android.internal.view.menu.MenuBuilder; 29import com.android.internal.widget.EditableInputConnection; 30 31import android.R; 32import android.app.PendingIntent; 33import android.app.PendingIntent.CanceledException; 34import android.content.ClipData; 35import android.content.ClipData.Item; 36import android.content.Context; 37import android.content.Intent; 38import android.content.pm.PackageManager; 39import android.content.res.TypedArray; 40import android.graphics.Canvas; 41import android.graphics.Color; 42import android.graphics.Matrix; 43import android.graphics.Paint; 44import android.graphics.Path; 45import android.graphics.Rect; 46import android.graphics.RectF; 47import android.graphics.drawable.Drawable; 48import android.inputmethodservice.ExtractEditText; 49import android.os.Bundle; 50import android.os.Handler; 51import android.os.ParcelableParcel; 52import android.os.SystemClock; 53import android.provider.Settings; 54import android.text.DynamicLayout; 55import android.text.Editable; 56import android.text.InputType; 57import android.text.Layout; 58import android.text.ParcelableSpan; 59import android.text.Selection; 60import android.text.SpanWatcher; 61import android.text.Spannable; 62import android.text.SpannableStringBuilder; 63import android.text.Spanned; 64import android.text.StaticLayout; 65import android.text.TextUtils; 66import android.text.method.KeyListener; 67import android.text.method.MetaKeyKeyListener; 68import android.text.method.MovementMethod; 69import android.text.method.PasswordTransformationMethod; 70import android.text.method.WordIterator; 71import android.text.style.EasyEditSpan; 72import android.text.style.SuggestionRangeSpan; 73import android.text.style.SuggestionSpan; 74import android.text.style.TextAppearanceSpan; 75import android.text.style.URLSpan; 76import android.util.DisplayMetrics; 77import android.util.Log; 78import android.view.ActionMode; 79import android.view.ActionMode.Callback; 80import android.view.RenderNode; 81import android.view.DragEvent; 82import android.view.Gravity; 83import android.view.HardwareCanvas; 84import android.view.LayoutInflater; 85import android.view.Menu; 86import android.view.MenuItem; 87import android.view.MotionEvent; 88import android.view.View; 89import android.view.View.DragShadowBuilder; 90import android.view.View.OnClickListener; 91import android.view.ViewConfiguration; 92import android.view.ViewGroup; 93import android.view.ViewGroup.LayoutParams; 94import android.view.ViewParent; 95import android.view.ViewTreeObserver; 96import android.view.WindowManager; 97import android.view.inputmethod.CorrectionInfo; 98import android.view.inputmethod.CursorAnchorInfo; 99import android.view.inputmethod.EditorInfo; 100import android.view.inputmethod.ExtractedText; 101import android.view.inputmethod.ExtractedTextRequest; 102import android.view.inputmethod.InputConnection; 103import android.view.inputmethod.InputMethodManager; 104import android.widget.AdapterView.OnItemClickListener; 105import android.widget.TextView.Drawables; 106import android.widget.TextView.OnEditorActionListener; 107 108import java.text.BreakIterator; 109import java.util.Arrays; 110import java.util.Comparator; 111import java.util.HashMap; 112 113/** 114 * Helper class used by TextView to handle editable text views. 115 * 116 * @hide 117 */ 118public class Editor { 119 private static final String TAG = "Editor"; 120 private static final boolean DEBUG_UNDO = false; 121 122 static final int BLINK = 500; 123 private static final float[] TEMP_POSITION = new float[2]; 124 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 125 // Tag used when the Editor maintains its own separate UndoManager. 126 private static final String UNDO_OWNER_TAG = "Editor"; 127 128 // Each Editor manages its own undo stack. 129 private final UndoManager mUndoManager = new UndoManager(); 130 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 131 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 132 boolean mAllowUndo = true; 133 134 // Cursor Controllers. 135 InsertionPointCursorController mInsertionPointCursorController; 136 SelectionModifierCursorController mSelectionModifierCursorController; 137 ActionMode mSelectionActionMode; 138 boolean mInsertionControllerEnabled; 139 boolean mSelectionControllerEnabled; 140 141 // Used to highlight a word when it is corrected by the IME 142 CorrectionHighlighter mCorrectionHighlighter; 143 144 InputContentType mInputContentType; 145 InputMethodState mInputMethodState; 146 147 private static class TextDisplayList { 148 RenderNode displayList; 149 boolean isDirty; 150 public TextDisplayList(String name) { 151 isDirty = true; 152 displayList = RenderNode.create(name, null); 153 } 154 boolean needsRecord() { return isDirty || !displayList.isValid(); } 155 } 156 TextDisplayList[] mTextDisplayLists; 157 158 boolean mFrozenWithFocus; 159 boolean mSelectionMoved; 160 boolean mTouchFocusSelected; 161 162 KeyListener mKeyListener; 163 int mInputType = EditorInfo.TYPE_NULL; 164 165 boolean mDiscardNextActionUp; 166 boolean mIgnoreActionUpEvent; 167 168 long mShowCursor; 169 Blink mBlink; 170 171 boolean mCursorVisible = true; 172 boolean mSelectAllOnFocus; 173 boolean mTextIsSelectable; 174 175 CharSequence mError; 176 boolean mErrorWasChanged; 177 ErrorPopup mErrorPopup; 178 179 /** 180 * This flag is set if the TextView tries to display an error before it 181 * is attached to the window (so its position is still unknown). 182 * It causes the error to be shown later, when onAttachedToWindow() 183 * is called. 184 */ 185 boolean mShowErrorAfterAttach; 186 187 boolean mInBatchEditControllers; 188 boolean mShowSoftInputOnFocus = true; 189 boolean mPreserveDetachedSelection; 190 boolean mTemporaryDetach; 191 192 SuggestionsPopupWindow mSuggestionsPopupWindow; 193 SuggestionRangeSpan mSuggestionRangeSpan; 194 Runnable mShowSuggestionRunnable; 195 196 final Drawable[] mCursorDrawable = new Drawable[2]; 197 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 198 199 private Drawable mSelectHandleLeft; 200 private Drawable mSelectHandleRight; 201 private Drawable mSelectHandleCenter; 202 203 // Global listener that detects changes in the global position of the TextView 204 private PositionListener mPositionListener; 205 206 float mLastDownPositionX, mLastDownPositionY; 207 Callback mCustomSelectionActionModeCallback; 208 209 // Set when this TextView gained focus with some text selected. Will start selection mode. 210 boolean mCreatedWithASelection; 211 212 // The span controller helps monitoring the changes to which the Editor needs to react: 213 // - EasyEditSpans, for which we have some UI to display on attach and on hide 214 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 215 private SpanController mSpanController; 216 217 WordIterator mWordIterator; 218 SpellChecker mSpellChecker; 219 220 // This word iterator is set with text and used to determine word boundaries 221 // when a user is selecting text. 222 private WordIterator mWordIteratorWithText; 223 // Indicate that the text in the word iterator needs to be updated. 224 private boolean mUpdateWordIteratorText; 225 226 private Rect mTempRect; 227 228 private TextView mTextView; 229 230 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 231 232 Editor(TextView textView) { 233 mTextView = textView; 234 // Synchronize the filter list, which places the undo input filter at the end. 235 mTextView.setFilters(mTextView.getFilters()); 236 } 237 238 ParcelableParcel saveInstanceState() { 239 // For now there is only undo state. 240 return (ParcelableParcel) mUndoManager.saveInstanceState(); 241 } 242 243 void restoreInstanceState(ParcelableParcel state) { 244 mUndoManager.restoreInstanceState(state); 245 // Re-associate this object as the owner of undo state. 246 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 247 } 248 249 /** 250 * Forgets all undo and redo operations for this Editor. 251 */ 252 void forgetUndoRedo() { 253 UndoOwner[] owners = { mUndoOwner }; 254 mUndoManager.forgetUndos(owners, -1 /* all */); 255 mUndoManager.forgetRedos(owners, -1 /* all */); 256 } 257 258 boolean canUndo() { 259 UndoOwner[] owners = { mUndoOwner }; 260 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 261 } 262 263 boolean canRedo() { 264 UndoOwner[] owners = { mUndoOwner }; 265 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 266 } 267 268 void undo() { 269 if (!mAllowUndo) { 270 return; 271 } 272 UndoOwner[] owners = { mUndoOwner }; 273 mUndoManager.undo(owners, 1); // Undo 1 action. 274 } 275 276 void redo() { 277 if (!mAllowUndo) { 278 return; 279 } 280 UndoOwner[] owners = { mUndoOwner }; 281 mUndoManager.redo(owners, 1); // Redo 1 action. 282 } 283 284 void onAttachedToWindow() { 285 if (mShowErrorAfterAttach) { 286 showError(); 287 mShowErrorAfterAttach = false; 288 } 289 mTemporaryDetach = false; 290 291 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 292 // No need to create the controller. 293 // The get method will add the listener on controller creation. 294 if (mInsertionPointCursorController != null) { 295 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 296 } 297 if (mSelectionModifierCursorController != null) { 298 mSelectionModifierCursorController.resetTouchOffsets(); 299 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 300 } 301 updateSpellCheckSpans(0, mTextView.getText().length(), 302 true /* create the spell checker if needed */); 303 304 if (mTextView.hasTransientState() && 305 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 306 // Since transient state is reference counted make sure it stays matched 307 // with our own calls to it for managing selection. 308 // The action mode callback will set this back again when/if the action mode starts. 309 mTextView.setHasTransientState(false); 310 311 // We had an active selection from before, start the selection mode. 312 startSelectionActionMode(); 313 } 314 315 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 316 } 317 318 void onDetachedFromWindow() { 319 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 320 321 if (mError != null) { 322 hideError(); 323 } 324 325 if (mBlink != null) { 326 mBlink.removeCallbacks(mBlink); 327 } 328 329 if (mInsertionPointCursorController != null) { 330 mInsertionPointCursorController.onDetached(); 331 } 332 333 if (mSelectionModifierCursorController != null) { 334 mSelectionModifierCursorController.onDetached(); 335 } 336 337 if (mShowSuggestionRunnable != null) { 338 mTextView.removeCallbacks(mShowSuggestionRunnable); 339 } 340 341 destroyDisplayListsData(); 342 343 if (mSpellChecker != null) { 344 mSpellChecker.closeSession(); 345 // Forces the creation of a new SpellChecker next time this window is created. 346 // Will handle the cases where the settings has been changed in the meantime. 347 mSpellChecker = null; 348 } 349 350 mPreserveDetachedSelection = true; 351 hideControllers(); 352 mPreserveDetachedSelection = false; 353 mTemporaryDetach = false; 354 } 355 356 private void destroyDisplayListsData() { 357 if (mTextDisplayLists != null) { 358 for (int i = 0; i < mTextDisplayLists.length; i++) { 359 RenderNode displayList = mTextDisplayLists[i] != null 360 ? mTextDisplayLists[i].displayList : null; 361 if (displayList != null && displayList.isValid()) { 362 displayList.destroyDisplayListData(); 363 } 364 } 365 } 366 } 367 368 private void showError() { 369 if (mTextView.getWindowToken() == null) { 370 mShowErrorAfterAttach = true; 371 return; 372 } 373 374 if (mErrorPopup == null) { 375 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 376 final TextView err = (TextView) inflater.inflate( 377 com.android.internal.R.layout.textview_hint, null); 378 379 final float scale = mTextView.getResources().getDisplayMetrics().density; 380 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 381 mErrorPopup.setFocusable(false); 382 // The user is entering text, so the input method is needed. We 383 // don't want the popup to be displayed on top of it. 384 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 385 } 386 387 TextView tv = (TextView) mErrorPopup.getContentView(); 388 chooseSize(mErrorPopup, mError, tv); 389 tv.setText(mError); 390 391 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 392 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 393 } 394 395 public void setError(CharSequence error, Drawable icon) { 396 mError = TextUtils.stringOrSpannedString(error); 397 mErrorWasChanged = true; 398 399 if (mError == null) { 400 setErrorIcon(null); 401 if (mErrorPopup != null) { 402 if (mErrorPopup.isShowing()) { 403 mErrorPopup.dismiss(); 404 } 405 406 mErrorPopup = null; 407 } 408 mShowErrorAfterAttach = false; 409 } else { 410 setErrorIcon(icon); 411 if (mTextView.isFocused()) { 412 showError(); 413 } 414 } 415 } 416 417 private void setErrorIcon(Drawable icon) { 418 Drawables dr = mTextView.mDrawables; 419 if (dr == null) { 420 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 421 } 422 dr.setErrorDrawable(icon, mTextView); 423 424 mTextView.resetResolvedDrawables(); 425 mTextView.invalidate(); 426 mTextView.requestLayout(); 427 } 428 429 private void hideError() { 430 if (mErrorPopup != null) { 431 if (mErrorPopup.isShowing()) { 432 mErrorPopup.dismiss(); 433 } 434 } 435 436 mShowErrorAfterAttach = false; 437 } 438 439 /** 440 * Returns the X offset to make the pointy top of the error point 441 * at the middle of the error icon. 442 */ 443 private int getErrorX() { 444 /* 445 * The "25" is the distance between the point and the right edge 446 * of the background 447 */ 448 final float scale = mTextView.getResources().getDisplayMetrics().density; 449 450 final Drawables dr = mTextView.mDrawables; 451 452 final int layoutDirection = mTextView.getLayoutDirection(); 453 int errorX; 454 int offset; 455 switch (layoutDirection) { 456 default: 457 case View.LAYOUT_DIRECTION_LTR: 458 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 459 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 460 mTextView.getPaddingRight() + offset; 461 break; 462 case View.LAYOUT_DIRECTION_RTL: 463 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 464 errorX = mTextView.getPaddingLeft() + offset; 465 break; 466 } 467 return errorX; 468 } 469 470 /** 471 * Returns the Y offset to make the pointy top of the error point 472 * at the bottom of the error icon. 473 */ 474 private int getErrorY() { 475 /* 476 * Compound, not extended, because the icon is not clipped 477 * if the text height is smaller. 478 */ 479 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 480 int vspace = mTextView.getBottom() - mTextView.getTop() - 481 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 482 483 final Drawables dr = mTextView.mDrawables; 484 485 final int layoutDirection = mTextView.getLayoutDirection(); 486 int height; 487 switch (layoutDirection) { 488 default: 489 case View.LAYOUT_DIRECTION_LTR: 490 height = (dr != null ? dr.mDrawableHeightRight : 0); 491 break; 492 case View.LAYOUT_DIRECTION_RTL: 493 height = (dr != null ? dr.mDrawableHeightLeft : 0); 494 break; 495 } 496 497 int icontop = compoundPaddingTop + (vspace - height) / 2; 498 499 /* 500 * The "2" is the distance between the point and the top edge 501 * of the background. 502 */ 503 final float scale = mTextView.getResources().getDisplayMetrics().density; 504 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 505 } 506 507 void createInputContentTypeIfNeeded() { 508 if (mInputContentType == null) { 509 mInputContentType = new InputContentType(); 510 } 511 } 512 513 void createInputMethodStateIfNeeded() { 514 if (mInputMethodState == null) { 515 mInputMethodState = new InputMethodState(); 516 } 517 } 518 519 boolean isCursorVisible() { 520 // The default value is true, even when there is no associated Editor 521 return mCursorVisible && mTextView.isTextEditable(); 522 } 523 524 void prepareCursorControllers() { 525 boolean windowSupportsHandles = false; 526 527 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 528 if (params instanceof WindowManager.LayoutParams) { 529 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 530 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 531 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 532 } 533 534 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 535 mInsertionControllerEnabled = enabled && isCursorVisible(); 536 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 537 538 if (!mInsertionControllerEnabled) { 539 hideInsertionPointCursorController(); 540 if (mInsertionPointCursorController != null) { 541 mInsertionPointCursorController.onDetached(); 542 mInsertionPointCursorController = null; 543 } 544 } 545 546 if (!mSelectionControllerEnabled) { 547 stopSelectionActionMode(); 548 if (mSelectionModifierCursorController != null) { 549 mSelectionModifierCursorController.onDetached(); 550 mSelectionModifierCursorController = null; 551 } 552 } 553 } 554 555 private void hideInsertionPointCursorController() { 556 if (mInsertionPointCursorController != null) { 557 mInsertionPointCursorController.hide(); 558 } 559 } 560 561 /** 562 * Hides the insertion controller and stops text selection mode, hiding the selection controller 563 */ 564 void hideControllers() { 565 hideCursorControllers(); 566 hideSpanControllers(); 567 } 568 569 private void hideSpanControllers() { 570 if (mSpanController != null) { 571 mSpanController.hide(); 572 } 573 } 574 575 private void hideCursorControllers() { 576 if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) { 577 // Should be done before hide insertion point controller since it triggers a show of it 578 mSuggestionsPopupWindow.hide(); 579 } 580 hideInsertionPointCursorController(); 581 stopSelectionActionMode(); 582 } 583 584 /** 585 * Create new SpellCheckSpans on the modified region. 586 */ 587 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 588 // Remove spans whose adjacent characters are text not punctuation 589 mTextView.removeAdjacentSuggestionSpans(start); 590 mTextView.removeAdjacentSuggestionSpans(end); 591 592 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 593 !(mTextView instanceof ExtractEditText)) { 594 if (mSpellChecker == null && createSpellChecker) { 595 mSpellChecker = new SpellChecker(mTextView); 596 } 597 if (mSpellChecker != null) { 598 mSpellChecker.spellCheck(start, end); 599 } 600 } 601 } 602 603 void onScreenStateChanged(int screenState) { 604 switch (screenState) { 605 case View.SCREEN_STATE_ON: 606 resumeBlink(); 607 break; 608 case View.SCREEN_STATE_OFF: 609 suspendBlink(); 610 break; 611 } 612 } 613 614 private void suspendBlink() { 615 if (mBlink != null) { 616 mBlink.cancel(); 617 } 618 } 619 620 private void resumeBlink() { 621 if (mBlink != null) { 622 mBlink.uncancel(); 623 makeBlink(); 624 } 625 } 626 627 void adjustInputType(boolean password, boolean passwordInputType, 628 boolean webPasswordInputType, boolean numberPasswordInputType) { 629 // mInputType has been set from inputType, possibly modified by mInputMethod. 630 // Specialize mInputType to [web]password if we have a text class and the original input 631 // type was a password. 632 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 633 if (password || passwordInputType) { 634 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 635 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 636 } 637 if (webPasswordInputType) { 638 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 639 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 640 } 641 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 642 if (numberPasswordInputType) { 643 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 644 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 645 } 646 } 647 } 648 649 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 650 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 651 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 652 653 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 654 com.android.internal.R.dimen.textview_error_popup_default_width); 655 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 656 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 657 float max = 0; 658 for (int i = 0; i < l.getLineCount(); i++) { 659 max = Math.max(max, l.getLineWidth(i)); 660 } 661 662 /* 663 * Now set the popup size to be big enough for the text plus the border capped 664 * to DEFAULT_MAX_POPUP_WIDTH 665 */ 666 pop.setWidth(wid + (int) Math.ceil(max)); 667 pop.setHeight(ht + l.getHeight()); 668 } 669 670 void setFrame() { 671 if (mErrorPopup != null) { 672 TextView tv = (TextView) mErrorPopup.getContentView(); 673 chooseSize(mErrorPopup, mError, tv); 674 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 675 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 676 } 677 } 678 679 /** 680 * Unlike {@link TextView#textCanBeSelected()}, this method is based on the <i>current</i> state 681 * of the TextView. textCanBeSelected() has to be true (this is one of the conditions to have 682 * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient. 683 */ 684 private boolean canSelectText() { 685 return hasSelectionController() && mTextView.getText().length() != 0; 686 } 687 688 /** 689 * It would be better to rely on the input type for everything. A password inputType should have 690 * a password transformation. We should hence use isPasswordInputType instead of this method. 691 * 692 * We should: 693 * - Call setInputType in setKeyListener instead of changing the input type directly (which 694 * would install the correct transformation). 695 * - Refuse the installation of a non-password transformation in setTransformation if the input 696 * type is password. 697 * 698 * However, this is like this for legacy reasons and we cannot break existing apps. This method 699 * is useful since it matches what the user can see (obfuscated text or not). 700 * 701 * @return true if the current transformation method is of the password type. 702 */ 703 private boolean hasPasswordTransformationMethod() { 704 return mTextView.getTransformationMethod() instanceof PasswordTransformationMethod; 705 } 706 707 private int getWordStart(int offset) { 708 // FIXME - For this and similar methods we're not doing anything to check if there's 709 // a LocaleSpan in the text, this may be something we should try handling or checking for. 710 int retOffset = getWordIteratorWithText().getBeginning(offset); 711 if (retOffset == BreakIterator.DONE) retOffset = offset; 712 return retOffset; 713 } 714 715 private int getWordEnd(int offset, boolean includePunctuation) { 716 int retOffset = getWordIteratorWithText().getEnd(offset); 717 if (retOffset == BreakIterator.DONE) { 718 retOffset = offset; 719 } else if (includePunctuation) { 720 retOffset = handlePunctuation(retOffset); 721 } 722 return retOffset; 723 } 724 725 private boolean isEndBoundary(int offset) { 726 int thisEnd = getWordEnd(offset, false); 727 return offset == thisEnd; 728 } 729 730 private boolean isStartBoundary(int offset) { 731 int thisStart = getWordStart(offset); 732 return thisStart == offset; 733 } 734 735 private int handlePunctuation(int offset) { 736 // FIXME - Check with UX how repeated ending punctuation should be handled. 737 // FIXME - Check with UX if / how we would handle non sentence ending characters. 738 // FIXME - Consider punctuation in different languages. 739 CharSequence text = mTextView.getText(); 740 if (offset < text.length()) { 741 int c = Character.codePointAt(text, offset); 742 if (c == 0x002e /* period */|| c == 0x003f /* question mark */ 743 || c == 0x0021 /* exclamation mark */) { 744 offset = Character.offsetByCodePoints(text, offset, 1); 745 } 746 } 747 return offset; 748 } 749 750 /** 751 * Adjusts selection to the word under last touch offset. Return true if the operation was 752 * successfully performed. 753 */ 754 private boolean selectCurrentWord() { 755 if (!canSelectText()) { 756 return false; 757 } 758 759 if (hasPasswordTransformationMethod()) { 760 // Always select all on a password field. 761 // Cut/copy menu entries are not available for passwords, but being able to select all 762 // is however useful to delete or paste to replace the entire content. 763 return mTextView.selectAllText(); 764 } 765 766 int inputType = mTextView.getInputType(); 767 int klass = inputType & InputType.TYPE_MASK_CLASS; 768 int variation = inputType & InputType.TYPE_MASK_VARIATION; 769 770 // Specific text field types: select the entire text for these 771 if (klass == InputType.TYPE_CLASS_NUMBER || 772 klass == InputType.TYPE_CLASS_PHONE || 773 klass == InputType.TYPE_CLASS_DATETIME || 774 variation == InputType.TYPE_TEXT_VARIATION_URI || 775 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 776 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 777 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 778 return mTextView.selectAllText(); 779 } 780 781 long lastTouchOffsets = getLastTouchOffsets(); 782 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 783 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 784 785 // Safety check in case standard touch event handling has been bypassed 786 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 787 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 788 789 int selectionStart, selectionEnd; 790 791 // If a URLSpan (web address, email, phone...) is found at that position, select it. 792 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 793 getSpans(minOffset, maxOffset, URLSpan.class); 794 if (urlSpans.length >= 1) { 795 URLSpan urlSpan = urlSpans[0]; 796 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 797 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 798 } else { 799 // FIXME - We should check if there's a LocaleSpan in the text, this may be 800 // something we should try handling or checking for. 801 final WordIterator wordIterator = getWordIterator(); 802 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 803 804 selectionStart = wordIterator.getBeginning(minOffset); 805 selectionEnd = wordIterator.getEnd(maxOffset); 806 807 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 808 selectionStart == selectionEnd) { 809 // Possible when the word iterator does not properly handle the text's language 810 long range = getCharRange(minOffset); 811 selectionStart = TextUtils.unpackRangeStartFromLong(range); 812 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 813 } 814 } 815 816 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 817 return selectionEnd > selectionStart; 818 } 819 820 void onLocaleChanged() { 821 // Will be re-created on demand in getWordIterator with the proper new locale 822 mWordIterator = null; 823 mWordIteratorWithText = null; 824 } 825 826 /** 827 * @hide 828 */ 829 public WordIterator getWordIterator() { 830 if (mWordIterator == null) { 831 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 832 } 833 return mWordIterator; 834 } 835 836 private WordIterator getWordIteratorWithText() { 837 if (mWordIteratorWithText == null) { 838 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 839 mUpdateWordIteratorText = true; 840 } 841 if (mUpdateWordIteratorText) { 842 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 843 // to the user's selection is needed. A possible solution would be to 844 // copy some number N of characters near the selection and then when the 845 // user approaches N then we'd do another copy of the next N characters. 846 CharSequence text = mTextView.getText(); 847 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 848 mUpdateWordIteratorText = false; 849 } 850 return mWordIteratorWithText; 851 } 852 853 private long getCharRange(int offset) { 854 final int textLength = mTextView.getText().length(); 855 if (offset + 1 < textLength) { 856 final char currentChar = mTextView.getText().charAt(offset); 857 final char nextChar = mTextView.getText().charAt(offset + 1); 858 if (Character.isSurrogatePair(currentChar, nextChar)) { 859 return TextUtils.packRangeInLong(offset, offset + 2); 860 } 861 } 862 if (offset < textLength) { 863 return TextUtils.packRangeInLong(offset, offset + 1); 864 } 865 if (offset - 2 >= 0) { 866 final char previousChar = mTextView.getText().charAt(offset - 1); 867 final char previousPreviousChar = mTextView.getText().charAt(offset - 2); 868 if (Character.isSurrogatePair(previousPreviousChar, previousChar)) { 869 return TextUtils.packRangeInLong(offset - 2, offset); 870 } 871 } 872 if (offset - 1 >= 0) { 873 return TextUtils.packRangeInLong(offset - 1, offset); 874 } 875 return TextUtils.packRangeInLong(offset, offset); 876 } 877 878 private boolean touchPositionIsInSelection() { 879 int selectionStart = mTextView.getSelectionStart(); 880 int selectionEnd = mTextView.getSelectionEnd(); 881 882 if (selectionStart == selectionEnd) { 883 return false; 884 } 885 886 if (selectionStart > selectionEnd) { 887 int tmp = selectionStart; 888 selectionStart = selectionEnd; 889 selectionEnd = tmp; 890 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 891 } 892 893 SelectionModifierCursorController selectionController = getSelectionController(); 894 int minOffset = selectionController.getMinTouchOffset(); 895 int maxOffset = selectionController.getMaxTouchOffset(); 896 897 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 898 } 899 900 private PositionListener getPositionListener() { 901 if (mPositionListener == null) { 902 mPositionListener = new PositionListener(); 903 } 904 return mPositionListener; 905 } 906 907 private interface TextViewPositionListener { 908 public void updatePosition(int parentPositionX, int parentPositionY, 909 boolean parentPositionChanged, boolean parentScrolled); 910 } 911 912 private boolean isPositionVisible(final float positionX, final float positionY) { 913 synchronized (TEMP_POSITION) { 914 final float[] position = TEMP_POSITION; 915 position[0] = positionX; 916 position[1] = positionY; 917 View view = mTextView; 918 919 while (view != null) { 920 if (view != mTextView) { 921 // Local scroll is already taken into account in positionX/Y 922 position[0] -= view.getScrollX(); 923 position[1] -= view.getScrollY(); 924 } 925 926 if (position[0] < 0 || position[1] < 0 || 927 position[0] > view.getWidth() || position[1] > view.getHeight()) { 928 return false; 929 } 930 931 if (!view.getMatrix().isIdentity()) { 932 view.getMatrix().mapPoints(position); 933 } 934 935 position[0] += view.getLeft(); 936 position[1] += view.getTop(); 937 938 final ViewParent parent = view.getParent(); 939 if (parent instanceof View) { 940 view = (View) parent; 941 } else { 942 // We've reached the ViewRoot, stop iterating 943 view = null; 944 } 945 } 946 } 947 948 // We've been able to walk up the view hierarchy and the position was never clipped 949 return true; 950 } 951 952 private boolean isOffsetVisible(int offset) { 953 Layout layout = mTextView.getLayout(); 954 if (layout == null) return false; 955 956 final int line = layout.getLineForOffset(offset); 957 final int lineBottom = layout.getLineBottom(line); 958 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 959 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 960 lineBottom + mTextView.viewportToContentVerticalOffset()); 961 } 962 963 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 964 * in the view. Returns false when the position is in the empty space of left/right of text. 965 */ 966 private boolean isPositionOnText(float x, float y) { 967 Layout layout = mTextView.getLayout(); 968 if (layout == null) return false; 969 970 final int line = mTextView.getLineAtCoordinate(y); 971 x = mTextView.convertToLocalHorizontalCoordinate(x); 972 973 if (x < layout.getLineLeft(line)) return false; 974 if (x > layout.getLineRight(line)) return false; 975 return true; 976 } 977 978 public boolean performLongClick(boolean handled) { 979 // Long press in empty space moves cursor and shows the Paste affordance if available. 980 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 981 mInsertionControllerEnabled) { 982 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 983 mLastDownPositionY); 984 stopSelectionActionMode(); 985 Selection.setSelection((Spannable) mTextView.getText(), offset); 986 getInsertionController().showWithActionPopup(); 987 handled = true; 988 } 989 990 if (!handled && mSelectionActionMode != null) { 991 if (touchPositionIsInSelection()) { 992 // Start a drag 993 final int start = mTextView.getSelectionStart(); 994 final int end = mTextView.getSelectionEnd(); 995 CharSequence selectedText = mTextView.getTransformedText(start, end); 996 ClipData data = ClipData.newPlainText(null, selectedText); 997 DragLocalState localState = new DragLocalState(mTextView, start, end); 998 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0); 999 stopSelectionActionMode(); 1000 } else { 1001 stopSelectionActionMode(); 1002 startSelectionActionMode(); 1003 } 1004 handled = true; 1005 } 1006 1007 // Start a new selection 1008 if (!handled) { 1009 handled = startSelectionActionMode(); 1010 } 1011 1012 return handled; 1013 } 1014 1015 private long getLastTouchOffsets() { 1016 SelectionModifierCursorController selectionController = getSelectionController(); 1017 final int minOffset = selectionController.getMinTouchOffset(); 1018 final int maxOffset = selectionController.getMaxTouchOffset(); 1019 return TextUtils.packRangeInLong(minOffset, maxOffset); 1020 } 1021 1022 void onFocusChanged(boolean focused, int direction) { 1023 mShowCursor = SystemClock.uptimeMillis(); 1024 ensureEndedBatchEdit(); 1025 1026 if (focused) { 1027 int selStart = mTextView.getSelectionStart(); 1028 int selEnd = mTextView.getSelectionEnd(); 1029 1030 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1031 // mode for these, unless there was a specific selection already started. 1032 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1033 selEnd == mTextView.getText().length(); 1034 1035 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1036 !isFocusHighlighted; 1037 1038 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1039 // If a tap was used to give focus to that view, move cursor at tap position. 1040 // Has to be done before onTakeFocus, which can be overloaded. 1041 final int lastTapPosition = getLastTapPosition(); 1042 if (lastTapPosition >= 0) { 1043 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1044 } 1045 1046 // Note this may have to be moved out of the Editor class 1047 MovementMethod mMovement = mTextView.getMovementMethod(); 1048 if (mMovement != null) { 1049 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1050 } 1051 1052 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1053 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1054 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1055 // This special case ensure that we keep current selection in that case. 1056 // It would be better to know why the DecorView does not have focus at that time. 1057 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1058 selStart >= 0 && selEnd >= 0) { 1059 /* 1060 * Someone intentionally set the selection, so let them 1061 * do whatever it is that they wanted to do instead of 1062 * the default on-focus behavior. We reset the selection 1063 * here instead of just skipping the onTakeFocus() call 1064 * because some movement methods do something other than 1065 * just setting the selection in theirs and we still 1066 * need to go through that path. 1067 */ 1068 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1069 } 1070 1071 if (mSelectAllOnFocus) { 1072 mTextView.selectAllText(); 1073 } 1074 1075 mTouchFocusSelected = true; 1076 } 1077 1078 mFrozenWithFocus = false; 1079 mSelectionMoved = false; 1080 1081 if (mError != null) { 1082 showError(); 1083 } 1084 1085 makeBlink(); 1086 } else { 1087 if (mError != null) { 1088 hideError(); 1089 } 1090 // Don't leave us in the middle of a batch edit. 1091 mTextView.onEndBatchEdit(); 1092 1093 if (mTextView instanceof ExtractEditText) { 1094 // terminateTextSelectionMode removes selection, which we want to keep when 1095 // ExtractEditText goes out of focus. 1096 final int selStart = mTextView.getSelectionStart(); 1097 final int selEnd = mTextView.getSelectionEnd(); 1098 hideControllers(); 1099 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1100 } else { 1101 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1102 hideControllers(); 1103 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1104 downgradeEasyCorrectionSpans(); 1105 } 1106 1107 // No need to create the controller 1108 if (mSelectionModifierCursorController != null) { 1109 mSelectionModifierCursorController.resetTouchOffsets(); 1110 } 1111 } 1112 } 1113 1114 /** 1115 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1116 * span. 1117 */ 1118 private void downgradeEasyCorrectionSpans() { 1119 CharSequence text = mTextView.getText(); 1120 if (text instanceof Spannable) { 1121 Spannable spannable = (Spannable) text; 1122 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1123 spannable.length(), SuggestionSpan.class); 1124 for (int i = 0; i < suggestionSpans.length; i++) { 1125 int flags = suggestionSpans[i].getFlags(); 1126 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1127 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1128 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1129 suggestionSpans[i].setFlags(flags); 1130 } 1131 } 1132 } 1133 } 1134 1135 void sendOnTextChanged(int start, int after) { 1136 updateSpellCheckSpans(start, start + after, false); 1137 1138 // Flip flag to indicate the word iterator needs to have the text reset. 1139 mUpdateWordIteratorText = true; 1140 1141 // Hide the controllers as soon as text is modified (typing, procedural...) 1142 // We do not hide the span controllers, since they can be added when a new text is 1143 // inserted into the text view (voice IME). 1144 hideCursorControllers(); 1145 } 1146 1147 private int getLastTapPosition() { 1148 // No need to create the controller at that point, no last tap position saved 1149 if (mSelectionModifierCursorController != null) { 1150 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1151 if (lastTapPosition >= 0) { 1152 // Safety check, should not be possible. 1153 if (lastTapPosition > mTextView.getText().length()) { 1154 lastTapPosition = mTextView.getText().length(); 1155 } 1156 return lastTapPosition; 1157 } 1158 } 1159 1160 return -1; 1161 } 1162 1163 void onWindowFocusChanged(boolean hasWindowFocus) { 1164 if (hasWindowFocus) { 1165 if (mBlink != null) { 1166 mBlink.uncancel(); 1167 makeBlink(); 1168 } 1169 } else { 1170 if (mBlink != null) { 1171 mBlink.cancel(); 1172 } 1173 if (mInputContentType != null) { 1174 mInputContentType.enterDown = false; 1175 } 1176 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1177 hideControllers(); 1178 if (mSuggestionsPopupWindow != null) { 1179 mSuggestionsPopupWindow.onParentLostFocus(); 1180 } 1181 1182 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1183 ensureEndedBatchEdit(); 1184 } 1185 } 1186 1187 void onTouchEvent(MotionEvent event) { 1188 if (hasSelectionController()) { 1189 getSelectionController().onTouchEvent(event); 1190 } 1191 1192 if (mShowSuggestionRunnable != null) { 1193 mTextView.removeCallbacks(mShowSuggestionRunnable); 1194 mShowSuggestionRunnable = null; 1195 } 1196 1197 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1198 mLastDownPositionX = event.getX(); 1199 mLastDownPositionY = event.getY(); 1200 1201 // Reset this state; it will be re-set if super.onTouchEvent 1202 // causes focus to move to the view. 1203 mTouchFocusSelected = false; 1204 mIgnoreActionUpEvent = false; 1205 } 1206 } 1207 1208 public void beginBatchEdit() { 1209 mInBatchEditControllers = true; 1210 final InputMethodState ims = mInputMethodState; 1211 if (ims != null) { 1212 int nesting = ++ims.mBatchEditNesting; 1213 if (nesting == 1) { 1214 ims.mCursorChanged = false; 1215 ims.mChangedDelta = 0; 1216 if (ims.mContentChanged) { 1217 // We already have a pending change from somewhere else, 1218 // so turn this into a full update. 1219 ims.mChangedStart = 0; 1220 ims.mChangedEnd = mTextView.getText().length(); 1221 } else { 1222 ims.mChangedStart = EXTRACT_UNKNOWN; 1223 ims.mChangedEnd = EXTRACT_UNKNOWN; 1224 ims.mContentChanged = false; 1225 } 1226 mUndoInputFilter.beginBatchEdit(); 1227 mTextView.onBeginBatchEdit(); 1228 } 1229 } 1230 } 1231 1232 public void endBatchEdit() { 1233 mInBatchEditControllers = false; 1234 final InputMethodState ims = mInputMethodState; 1235 if (ims != null) { 1236 int nesting = --ims.mBatchEditNesting; 1237 if (nesting == 0) { 1238 finishBatchEdit(ims); 1239 } 1240 } 1241 } 1242 1243 void ensureEndedBatchEdit() { 1244 final InputMethodState ims = mInputMethodState; 1245 if (ims != null && ims.mBatchEditNesting != 0) { 1246 ims.mBatchEditNesting = 0; 1247 finishBatchEdit(ims); 1248 } 1249 } 1250 1251 void finishBatchEdit(final InputMethodState ims) { 1252 mTextView.onEndBatchEdit(); 1253 mUndoInputFilter.endBatchEdit(); 1254 1255 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1256 mTextView.updateAfterEdit(); 1257 reportExtractedText(); 1258 } else if (ims.mCursorChanged) { 1259 // Cheesy way to get us to report the current cursor location. 1260 mTextView.invalidateCursor(); 1261 } 1262 // sendUpdateSelection knows to avoid sending if the selection did 1263 // not actually change. 1264 sendUpdateSelection(); 1265 } 1266 1267 static final int EXTRACT_NOTHING = -2; 1268 static final int EXTRACT_UNKNOWN = -1; 1269 1270 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1271 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1272 EXTRACT_UNKNOWN, outText); 1273 } 1274 1275 private boolean extractTextInternal(ExtractedTextRequest request, 1276 int partialStartOffset, int partialEndOffset, int delta, 1277 ExtractedText outText) { 1278 final CharSequence content = mTextView.getText(); 1279 if (content != null) { 1280 if (partialStartOffset != EXTRACT_NOTHING) { 1281 final int N = content.length(); 1282 if (partialStartOffset < 0) { 1283 outText.partialStartOffset = outText.partialEndOffset = -1; 1284 partialStartOffset = 0; 1285 partialEndOffset = N; 1286 } else { 1287 // Now use the delta to determine the actual amount of text 1288 // we need. 1289 partialEndOffset += delta; 1290 // Adjust offsets to ensure we contain full spans. 1291 if (content instanceof Spanned) { 1292 Spanned spanned = (Spanned)content; 1293 Object[] spans = spanned.getSpans(partialStartOffset, 1294 partialEndOffset, ParcelableSpan.class); 1295 int i = spans.length; 1296 while (i > 0) { 1297 i--; 1298 int j = spanned.getSpanStart(spans[i]); 1299 if (j < partialStartOffset) partialStartOffset = j; 1300 j = spanned.getSpanEnd(spans[i]); 1301 if (j > partialEndOffset) partialEndOffset = j; 1302 } 1303 } 1304 outText.partialStartOffset = partialStartOffset; 1305 outText.partialEndOffset = partialEndOffset - delta; 1306 1307 if (partialStartOffset > N) { 1308 partialStartOffset = N; 1309 } else if (partialStartOffset < 0) { 1310 partialStartOffset = 0; 1311 } 1312 if (partialEndOffset > N) { 1313 partialEndOffset = N; 1314 } else if (partialEndOffset < 0) { 1315 partialEndOffset = 0; 1316 } 1317 } 1318 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1319 outText.text = content.subSequence(partialStartOffset, 1320 partialEndOffset); 1321 } else { 1322 outText.text = TextUtils.substring(content, partialStartOffset, 1323 partialEndOffset); 1324 } 1325 } else { 1326 outText.partialStartOffset = 0; 1327 outText.partialEndOffset = 0; 1328 outText.text = ""; 1329 } 1330 outText.flags = 0; 1331 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1332 outText.flags |= ExtractedText.FLAG_SELECTING; 1333 } 1334 if (mTextView.isSingleLine()) { 1335 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1336 } 1337 outText.startOffset = 0; 1338 outText.selectionStart = mTextView.getSelectionStart(); 1339 outText.selectionEnd = mTextView.getSelectionEnd(); 1340 return true; 1341 } 1342 return false; 1343 } 1344 1345 boolean reportExtractedText() { 1346 final Editor.InputMethodState ims = mInputMethodState; 1347 if (ims != null) { 1348 final boolean contentChanged = ims.mContentChanged; 1349 if (contentChanged || ims.mSelectionModeChanged) { 1350 ims.mContentChanged = false; 1351 ims.mSelectionModeChanged = false; 1352 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1353 if (req != null) { 1354 InputMethodManager imm = InputMethodManager.peekInstance(); 1355 if (imm != null) { 1356 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1357 "Retrieving extracted start=" + ims.mChangedStart + 1358 " end=" + ims.mChangedEnd + 1359 " delta=" + ims.mChangedDelta); 1360 if (ims.mChangedStart < 0 && !contentChanged) { 1361 ims.mChangedStart = EXTRACT_NOTHING; 1362 } 1363 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1364 ims.mChangedDelta, ims.mExtractedText)) { 1365 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1366 "Reporting extracted start=" + 1367 ims.mExtractedText.partialStartOffset + 1368 " end=" + ims.mExtractedText.partialEndOffset + 1369 ": " + ims.mExtractedText.text); 1370 1371 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1372 ims.mChangedStart = EXTRACT_UNKNOWN; 1373 ims.mChangedEnd = EXTRACT_UNKNOWN; 1374 ims.mChangedDelta = 0; 1375 ims.mContentChanged = false; 1376 return true; 1377 } 1378 } 1379 } 1380 } 1381 } 1382 return false; 1383 } 1384 1385 private void sendUpdateSelection() { 1386 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1387 final InputMethodManager imm = InputMethodManager.peekInstance(); 1388 if (null != imm) { 1389 final int selectionStart = mTextView.getSelectionStart(); 1390 final int selectionEnd = mTextView.getSelectionEnd(); 1391 int candStart = -1; 1392 int candEnd = -1; 1393 if (mTextView.getText() instanceof Spannable) { 1394 final Spannable sp = (Spannable) mTextView.getText(); 1395 candStart = EditableInputConnection.getComposingSpanStart(sp); 1396 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1397 } 1398 // InputMethodManager#updateSelection skips sending the message if 1399 // none of the parameters have changed since the last time we called it. 1400 imm.updateSelection(mTextView, 1401 selectionStart, selectionEnd, candStart, candEnd); 1402 } 1403 } 1404 } 1405 1406 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1407 int cursorOffsetVertical) { 1408 final int selectionStart = mTextView.getSelectionStart(); 1409 final int selectionEnd = mTextView.getSelectionEnd(); 1410 1411 final InputMethodState ims = mInputMethodState; 1412 if (ims != null && ims.mBatchEditNesting == 0) { 1413 InputMethodManager imm = InputMethodManager.peekInstance(); 1414 if (imm != null) { 1415 if (imm.isActive(mTextView)) { 1416 boolean reported = false; 1417 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1418 // We are in extract mode and the content has changed 1419 // in some way... just report complete new text to the 1420 // input method. 1421 reported = reportExtractedText(); 1422 } 1423 } 1424 } 1425 } 1426 1427 if (mCorrectionHighlighter != null) { 1428 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1429 } 1430 1431 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1432 drawCursor(canvas, cursorOffsetVertical); 1433 // Rely on the drawable entirely, do not draw the cursor line. 1434 // Has to be done after the IMM related code above which relies on the highlight. 1435 highlight = null; 1436 } 1437 1438 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1439 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1440 cursorOffsetVertical); 1441 } else { 1442 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1443 } 1444 } 1445 1446 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1447 Paint highlightPaint, int cursorOffsetVertical) { 1448 final long lineRange = layout.getLineRangeForDraw(canvas); 1449 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1450 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1451 if (lastLine < 0) return; 1452 1453 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1454 firstLine, lastLine); 1455 1456 if (layout instanceof DynamicLayout) { 1457 if (mTextDisplayLists == null) { 1458 mTextDisplayLists = ArrayUtils.emptyArray(TextDisplayList.class); 1459 } 1460 1461 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1462 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1463 int[] blockIndices = dynamicLayout.getBlockIndices(); 1464 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1465 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1466 1467 int endOfPreviousBlock = -1; 1468 int searchStartIndex = 0; 1469 for (int i = 0; i < numberOfBlocks; i++) { 1470 int blockEndLine = blockEndLines[i]; 1471 int blockIndex = blockIndices[i]; 1472 1473 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1474 if (blockIsInvalid) { 1475 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1476 searchStartIndex); 1477 // Note how dynamic layout's internal block indices get updated from Editor 1478 blockIndices[i] = blockIndex; 1479 if (mTextDisplayLists[blockIndex] != null) { 1480 mTextDisplayLists[blockIndex].isDirty = true; 1481 } 1482 searchStartIndex = blockIndex + 1; 1483 } 1484 1485 if (mTextDisplayLists[blockIndex] == null) { 1486 mTextDisplayLists[blockIndex] = 1487 new TextDisplayList("Text " + blockIndex); 1488 } 1489 1490 final boolean blockDisplayListIsInvalid = mTextDisplayLists[blockIndex].needsRecord(); 1491 RenderNode blockDisplayList = mTextDisplayLists[blockIndex].displayList; 1492 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1493 final int blockBeginLine = endOfPreviousBlock + 1; 1494 final int top = layout.getLineTop(blockBeginLine); 1495 final int bottom = layout.getLineBottom(blockEndLine); 1496 int left = 0; 1497 int right = mTextView.getWidth(); 1498 if (mTextView.getHorizontallyScrolling()) { 1499 float min = Float.MAX_VALUE; 1500 float max = Float.MIN_VALUE; 1501 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1502 min = Math.min(min, layout.getLineLeft(line)); 1503 max = Math.max(max, layout.getLineRight(line)); 1504 } 1505 left = (int) min; 1506 right = (int) (max + 0.5f); 1507 } 1508 1509 // Rebuild display list if it is invalid 1510 if (blockDisplayListIsInvalid) { 1511 final HardwareCanvas hardwareCanvas = blockDisplayList.start( 1512 right - left, bottom - top); 1513 try { 1514 // drawText is always relative to TextView's origin, this translation 1515 // brings this range of text back to the top left corner of the viewport 1516 hardwareCanvas.translate(-left, -top); 1517 layout.drawText(hardwareCanvas, blockBeginLine, blockEndLine); 1518 mTextDisplayLists[blockIndex].isDirty = false; 1519 // No need to untranslate, previous context is popped after 1520 // drawDisplayList 1521 } finally { 1522 blockDisplayList.end(hardwareCanvas); 1523 // Same as drawDisplayList below, handled by our TextView's parent 1524 blockDisplayList.setClipToBounds(false); 1525 } 1526 } 1527 1528 // Valid disply list whose index is >= indexFirstChangedBlock 1529 // only needs to update its drawing location. 1530 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1531 } 1532 1533 ((HardwareCanvas) canvas).drawRenderNode(blockDisplayList, 1534 0 /* no child clipping, our TextView parent enforces it */); 1535 1536 endOfPreviousBlock = blockEndLine; 1537 } 1538 1539 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1540 } else { 1541 // Boring layout is used for empty and hint text 1542 layout.drawText(canvas, firstLine, lastLine); 1543 } 1544 } 1545 1546 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1547 int searchStartIndex) { 1548 int length = mTextDisplayLists.length; 1549 for (int i = searchStartIndex; i < length; i++) { 1550 boolean blockIndexFound = false; 1551 for (int j = 0; j < numberOfBlocks; j++) { 1552 if (blockIndices[j] == i) { 1553 blockIndexFound = true; 1554 break; 1555 } 1556 } 1557 if (blockIndexFound) continue; 1558 return i; 1559 } 1560 1561 // No available index found, the pool has to grow 1562 mTextDisplayLists = GrowingArrayUtils.append(mTextDisplayLists, length, null); 1563 return length; 1564 } 1565 1566 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1567 final boolean translate = cursorOffsetVertical != 0; 1568 if (translate) canvas.translate(0, cursorOffsetVertical); 1569 for (int i = 0; i < mCursorCount; i++) { 1570 mCursorDrawable[i].draw(canvas); 1571 } 1572 if (translate) canvas.translate(0, -cursorOffsetVertical); 1573 } 1574 1575 /** 1576 * Invalidates all the sub-display lists that overlap the specified character range 1577 */ 1578 void invalidateTextDisplayList(Layout layout, int start, int end) { 1579 if (mTextDisplayLists != null && layout instanceof DynamicLayout) { 1580 final int firstLine = layout.getLineForOffset(start); 1581 final int lastLine = layout.getLineForOffset(end); 1582 1583 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1584 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1585 int[] blockIndices = dynamicLayout.getBlockIndices(); 1586 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1587 1588 int i = 0; 1589 // Skip the blocks before firstLine 1590 while (i < numberOfBlocks) { 1591 if (blockEndLines[i] >= firstLine) break; 1592 i++; 1593 } 1594 1595 // Invalidate all subsequent blocks until lastLine is passed 1596 while (i < numberOfBlocks) { 1597 final int blockIndex = blockIndices[i]; 1598 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1599 mTextDisplayLists[blockIndex].isDirty = true; 1600 } 1601 if (blockEndLines[i] >= lastLine) break; 1602 i++; 1603 } 1604 } 1605 } 1606 1607 void invalidateTextDisplayList() { 1608 if (mTextDisplayLists != null) { 1609 for (int i = 0; i < mTextDisplayLists.length; i++) { 1610 if (mTextDisplayLists[i] != null) mTextDisplayLists[i].isDirty = true; 1611 } 1612 } 1613 } 1614 1615 void updateCursorsPositions() { 1616 if (mTextView.mCursorDrawableRes == 0) { 1617 mCursorCount = 0; 1618 return; 1619 } 1620 1621 Layout layout = mTextView.getLayout(); 1622 Layout hintLayout = mTextView.getHintLayout(); 1623 final int offset = mTextView.getSelectionStart(); 1624 final int line = layout.getLineForOffset(offset); 1625 final int top = layout.getLineTop(line); 1626 final int bottom = layout.getLineTop(line + 1); 1627 1628 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1629 1630 int middle = bottom; 1631 if (mCursorCount == 2) { 1632 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1633 middle = (top + bottom) >> 1; 1634 } 1635 1636 boolean clamped = layout.shouldClampCursor(line); 1637 updateCursorPosition(0, top, middle, 1638 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1639 1640 if (mCursorCount == 2) { 1641 updateCursorPosition(1, middle, bottom, 1642 layout.getSecondaryHorizontal(offset, clamped)); 1643 } 1644 } 1645 1646 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1647 boolean clamped) { 1648 if (TextUtils.isEmpty(layout.getText()) && 1649 hintLayout != null && 1650 !TextUtils.isEmpty(hintLayout.getText())) { 1651 return hintLayout.getPrimaryHorizontal(offset, clamped); 1652 } else { 1653 return layout.getPrimaryHorizontal(offset, clamped); 1654 } 1655 } 1656 1657 /** 1658 * @return true if the selection mode was actually started. 1659 */ 1660 boolean startSelectionActionMode() { 1661 if (mSelectionActionMode != null) { 1662 // Selection action mode is already started 1663 return false; 1664 } 1665 1666 if (!canSelectText() || !mTextView.requestFocus()) { 1667 Log.w(TextView.LOG_TAG, 1668 "TextView does not support text selection. Action mode cancelled."); 1669 return false; 1670 } 1671 1672 if (!mTextView.hasSelection()) { 1673 // There may already be a selection on device rotation 1674 if (!selectCurrentWord()) { 1675 // No word found under cursor or text selection not permitted. 1676 return false; 1677 } 1678 } 1679 1680 boolean willExtract = extractedTextModeWillBeStarted(); 1681 1682 // Do not start the action mode when extracted text will show up full screen, which would 1683 // immediately hide the newly created action bar and would be visually distracting. 1684 if (!willExtract) { 1685 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1686 mSelectionActionMode = mTextView.startActionMode(actionModeCallback); 1687 } 1688 1689 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1690 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1691 // Show the IME to be able to replace text, except when selecting non editable text. 1692 final InputMethodManager imm = InputMethodManager.peekInstance(); 1693 if (imm != null) { 1694 imm.showSoftInput(mTextView, 0, null); 1695 } 1696 } 1697 1698 if (selectionStarted) { 1699 getSelectionController().enterDrag(); 1700 } 1701 return selectionStarted; 1702 } 1703 1704 private boolean extractedTextModeWillBeStarted() { 1705 if (!(mTextView instanceof ExtractEditText)) { 1706 final InputMethodManager imm = InputMethodManager.peekInstance(); 1707 return imm != null && imm.isFullscreenMode(); 1708 } 1709 return false; 1710 } 1711 1712 /** 1713 * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}. 1714 */ 1715 private boolean isCursorInsideSuggestionSpan() { 1716 CharSequence text = mTextView.getText(); 1717 if (!(text instanceof Spannable)) return false; 1718 1719 SuggestionSpan[] suggestionSpans = ((Spannable) text).getSpans( 1720 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), SuggestionSpan.class); 1721 return (suggestionSpans.length > 0); 1722 } 1723 1724 /** 1725 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1726 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1727 */ 1728 private boolean isCursorInsideEasyCorrectionSpan() { 1729 Spannable spannable = (Spannable) mTextView.getText(); 1730 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1731 mTextView.getSelectionEnd(), SuggestionSpan.class); 1732 for (int i = 0; i < suggestionSpans.length; i++) { 1733 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1734 return true; 1735 } 1736 } 1737 return false; 1738 } 1739 1740 void onTouchUpEvent(MotionEvent event) { 1741 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1742 hideControllers(); 1743 CharSequence text = mTextView.getText(); 1744 if (!selectAllGotFocus && text.length() > 0) { 1745 // Move cursor 1746 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1747 Selection.setSelection((Spannable) text, offset); 1748 if (mSpellChecker != null) { 1749 // When the cursor moves, the word that was typed may need spell check 1750 mSpellChecker.onSelectionChanged(); 1751 } 1752 if (!extractedTextModeWillBeStarted()) { 1753 if (isCursorInsideEasyCorrectionSpan()) { 1754 mShowSuggestionRunnable = new Runnable() { 1755 public void run() { 1756 showSuggestions(); 1757 } 1758 }; 1759 // removeCallbacks is performed on every touch 1760 mTextView.postDelayed(mShowSuggestionRunnable, 1761 ViewConfiguration.getDoubleTapTimeout()); 1762 } else if (hasInsertionController()) { 1763 getInsertionController().show(); 1764 } 1765 } 1766 } 1767 } 1768 1769 protected void stopSelectionActionMode() { 1770 if (mSelectionActionMode != null) { 1771 // This will hide the mSelectionModifierCursorController 1772 mSelectionActionMode.finish(); 1773 } 1774 } 1775 1776 /** 1777 * @return True if this view supports insertion handles. 1778 */ 1779 boolean hasInsertionController() { 1780 return mInsertionControllerEnabled; 1781 } 1782 1783 /** 1784 * @return True if this view supports selection handles. 1785 */ 1786 boolean hasSelectionController() { 1787 return mSelectionControllerEnabled; 1788 } 1789 1790 InsertionPointCursorController getInsertionController() { 1791 if (!mInsertionControllerEnabled) { 1792 return null; 1793 } 1794 1795 if (mInsertionPointCursorController == null) { 1796 mInsertionPointCursorController = new InsertionPointCursorController(); 1797 1798 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1799 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1800 } 1801 1802 return mInsertionPointCursorController; 1803 } 1804 1805 SelectionModifierCursorController getSelectionController() { 1806 if (!mSelectionControllerEnabled) { 1807 return null; 1808 } 1809 1810 if (mSelectionModifierCursorController == null) { 1811 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1812 1813 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1814 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1815 } 1816 1817 return mSelectionModifierCursorController; 1818 } 1819 1820 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1821 if (mCursorDrawable[cursorIndex] == null) 1822 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1823 mTextView.mCursorDrawableRes); 1824 1825 if (mTempRect == null) mTempRect = new Rect(); 1826 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1827 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1828 horizontal = Math.max(0.5f, horizontal - 0.5f); 1829 final int left = (int) (horizontal) - mTempRect.left; 1830 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1831 bottom + mTempRect.bottom); 1832 } 1833 1834 /** 1835 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1836 * a dictionary) from the current input method, provided by it calling 1837 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1838 * implementation flashes the background of the corrected word to provide feedback to the user. 1839 * 1840 * @param info The auto correct info about the text that was corrected. 1841 */ 1842 public void onCommitCorrection(CorrectionInfo info) { 1843 if (mCorrectionHighlighter == null) { 1844 mCorrectionHighlighter = new CorrectionHighlighter(); 1845 } else { 1846 mCorrectionHighlighter.invalidate(false); 1847 } 1848 1849 mCorrectionHighlighter.highlight(info); 1850 } 1851 1852 void showSuggestions() { 1853 if (mSuggestionsPopupWindow == null) { 1854 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1855 } 1856 hideControllers(); 1857 mSuggestionsPopupWindow.show(); 1858 } 1859 1860 boolean areSuggestionsShown() { 1861 return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing(); 1862 } 1863 1864 void onScrollChanged() { 1865 if (mPositionListener != null) { 1866 mPositionListener.onScrollChanged(); 1867 } 1868 } 1869 1870 /** 1871 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1872 */ 1873 private boolean shouldBlink() { 1874 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1875 1876 final int start = mTextView.getSelectionStart(); 1877 if (start < 0) return false; 1878 1879 final int end = mTextView.getSelectionEnd(); 1880 if (end < 0) return false; 1881 1882 return start == end; 1883 } 1884 1885 void makeBlink() { 1886 if (shouldBlink()) { 1887 mShowCursor = SystemClock.uptimeMillis(); 1888 if (mBlink == null) mBlink = new Blink(); 1889 mBlink.removeCallbacks(mBlink); 1890 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 1891 } else { 1892 if (mBlink != null) mBlink.removeCallbacks(mBlink); 1893 } 1894 } 1895 1896 private class Blink extends Handler implements Runnable { 1897 private boolean mCancelled; 1898 1899 public void run() { 1900 if (mCancelled) { 1901 return; 1902 } 1903 1904 removeCallbacks(Blink.this); 1905 1906 if (shouldBlink()) { 1907 if (mTextView.getLayout() != null) { 1908 mTextView.invalidateCursorPath(); 1909 } 1910 1911 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 1912 } 1913 } 1914 1915 void cancel() { 1916 if (!mCancelled) { 1917 removeCallbacks(Blink.this); 1918 mCancelled = true; 1919 } 1920 } 1921 1922 void uncancel() { 1923 mCancelled = false; 1924 } 1925 } 1926 1927 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 1928 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 1929 com.android.internal.R.layout.text_drag_thumbnail, null); 1930 1931 if (shadowView == null) { 1932 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 1933 } 1934 1935 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 1936 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 1937 } 1938 shadowView.setText(text); 1939 shadowView.setTextColor(mTextView.getTextColors()); 1940 1941 shadowView.setTextAppearance(mTextView.getContext(), R.styleable.Theme_textAppearanceLarge); 1942 shadowView.setGravity(Gravity.CENTER); 1943 1944 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 1945 ViewGroup.LayoutParams.WRAP_CONTENT)); 1946 1947 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 1948 shadowView.measure(size, size); 1949 1950 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 1951 shadowView.invalidate(); 1952 return new DragShadowBuilder(shadowView); 1953 } 1954 1955 private static class DragLocalState { 1956 public TextView sourceTextView; 1957 public int start, end; 1958 1959 public DragLocalState(TextView sourceTextView, int start, int end) { 1960 this.sourceTextView = sourceTextView; 1961 this.start = start; 1962 this.end = end; 1963 } 1964 } 1965 1966 void onDrop(DragEvent event) { 1967 StringBuilder content = new StringBuilder(""); 1968 ClipData clipData = event.getClipData(); 1969 final int itemCount = clipData.getItemCount(); 1970 for (int i=0; i < itemCount; i++) { 1971 Item item = clipData.getItemAt(i); 1972 content.append(item.coerceToStyledText(mTextView.getContext())); 1973 } 1974 1975 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1976 1977 Object localState = event.getLocalState(); 1978 DragLocalState dragLocalState = null; 1979 if (localState instanceof DragLocalState) { 1980 dragLocalState = (DragLocalState) localState; 1981 } 1982 boolean dragDropIntoItself = dragLocalState != null && 1983 dragLocalState.sourceTextView == mTextView; 1984 1985 if (dragDropIntoItself) { 1986 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 1987 // A drop inside the original selection discards the drop. 1988 return; 1989 } 1990 } 1991 1992 final int originalLength = mTextView.getText().length(); 1993 int min = offset; 1994 int max = offset; 1995 1996 Selection.setSelection((Spannable) mTextView.getText(), max); 1997 mTextView.replaceText_internal(min, max, content); 1998 1999 if (dragDropIntoItself) { 2000 int dragSourceStart = dragLocalState.start; 2001 int dragSourceEnd = dragLocalState.end; 2002 if (max <= dragSourceStart) { 2003 // Inserting text before selection has shifted positions 2004 final int shift = mTextView.getText().length() - originalLength; 2005 dragSourceStart += shift; 2006 dragSourceEnd += shift; 2007 } 2008 2009 // Delete original selection 2010 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2011 2012 // Make sure we do not leave two adjacent spaces. 2013 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2014 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2015 if (nextCharIdx > prevCharIdx + 1) { 2016 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2017 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2018 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2019 } 2020 } 2021 } 2022 } 2023 2024 public void addSpanWatchers(Spannable text) { 2025 final int textLength = text.length(); 2026 2027 if (mKeyListener != null) { 2028 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2029 } 2030 2031 if (mSpanController == null) { 2032 mSpanController = new SpanController(); 2033 } 2034 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2035 } 2036 2037 /** 2038 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2039 * pop-up should be displayed. 2040 * Also monitors {@link Selection} to call back to the attached input method. 2041 */ 2042 class SpanController implements SpanWatcher { 2043 2044 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2045 2046 private EasyEditPopupWindow mPopupWindow; 2047 2048 private Runnable mHidePopup; 2049 2050 // This function is pure but inner classes can't have static functions 2051 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2052 final Object span) { 2053 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2054 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2055 } 2056 2057 @Override 2058 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2059 if (isNonIntermediateSelectionSpan(text, span)) { 2060 sendUpdateSelection(); 2061 } else if (span instanceof EasyEditSpan) { 2062 if (mPopupWindow == null) { 2063 mPopupWindow = new EasyEditPopupWindow(); 2064 mHidePopup = new Runnable() { 2065 @Override 2066 public void run() { 2067 hide(); 2068 } 2069 }; 2070 } 2071 2072 // Make sure there is only at most one EasyEditSpan in the text 2073 if (mPopupWindow.mEasyEditSpan != null) { 2074 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2075 } 2076 2077 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2078 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2079 @Override 2080 public void onDeleteClick(EasyEditSpan span) { 2081 Editable editable = (Editable) mTextView.getText(); 2082 int start = editable.getSpanStart(span); 2083 int end = editable.getSpanEnd(span); 2084 if (start >= 0 && end >= 0) { 2085 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2086 mTextView.deleteText_internal(start, end); 2087 } 2088 editable.removeSpan(span); 2089 } 2090 }); 2091 2092 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2093 // The window is not visible yet, ignore the text change. 2094 return; 2095 } 2096 2097 if (mTextView.getLayout() == null) { 2098 // The view has not been laid out yet, ignore the text change 2099 return; 2100 } 2101 2102 if (extractedTextModeWillBeStarted()) { 2103 // The input is in extract mode. Do not handle the easy edit in 2104 // the original TextView, as the ExtractEditText will do 2105 return; 2106 } 2107 2108 mPopupWindow.show(); 2109 mTextView.removeCallbacks(mHidePopup); 2110 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2111 } 2112 } 2113 2114 @Override 2115 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2116 if (isNonIntermediateSelectionSpan(text, span)) { 2117 sendUpdateSelection(); 2118 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2119 hide(); 2120 } 2121 } 2122 2123 @Override 2124 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2125 int newStart, int newEnd) { 2126 if (isNonIntermediateSelectionSpan(text, span)) { 2127 sendUpdateSelection(); 2128 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2129 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2130 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2131 text.removeSpan(easyEditSpan); 2132 } 2133 } 2134 2135 public void hide() { 2136 if (mPopupWindow != null) { 2137 mPopupWindow.hide(); 2138 mTextView.removeCallbacks(mHidePopup); 2139 } 2140 } 2141 2142 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2143 try { 2144 PendingIntent pendingIntent = span.getPendingIntent(); 2145 if (pendingIntent != null) { 2146 Intent intent = new Intent(); 2147 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2148 pendingIntent.send(mTextView.getContext(), 0, intent); 2149 } 2150 } catch (CanceledException e) { 2151 // This should not happen, as we should try to send the intent only once. 2152 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2153 } 2154 } 2155 } 2156 2157 /** 2158 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2159 */ 2160 private interface EasyEditDeleteListener { 2161 2162 /** 2163 * Clicks the delete pop-up. 2164 */ 2165 void onDeleteClick(EasyEditSpan span); 2166 } 2167 2168 /** 2169 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2170 * by {@link SpanController}. 2171 */ 2172 private class EasyEditPopupWindow extends PinnedPopupWindow 2173 implements OnClickListener { 2174 private static final int POPUP_TEXT_LAYOUT = 2175 com.android.internal.R.layout.text_edit_action_popup_text; 2176 private TextView mDeleteTextView; 2177 private EasyEditSpan mEasyEditSpan; 2178 private EasyEditDeleteListener mOnDeleteListener; 2179 2180 @Override 2181 protected void createPopupWindow() { 2182 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2183 com.android.internal.R.attr.textSelectHandleWindowStyle); 2184 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2185 mPopupWindow.setClippingEnabled(true); 2186 } 2187 2188 @Override 2189 protected void initContentView() { 2190 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2191 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2192 mContentView = linearLayout; 2193 mContentView.setBackgroundResource( 2194 com.android.internal.R.drawable.text_edit_side_paste_window); 2195 2196 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2197 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2198 2199 LayoutParams wrapContent = new LayoutParams( 2200 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2201 2202 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2203 mDeleteTextView.setLayoutParams(wrapContent); 2204 mDeleteTextView.setText(com.android.internal.R.string.delete); 2205 mDeleteTextView.setOnClickListener(this); 2206 mContentView.addView(mDeleteTextView); 2207 } 2208 2209 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2210 mEasyEditSpan = easyEditSpan; 2211 } 2212 2213 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2214 mOnDeleteListener = listener; 2215 } 2216 2217 @Override 2218 public void onClick(View view) { 2219 if (view == mDeleteTextView 2220 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2221 && mOnDeleteListener != null) { 2222 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2223 } 2224 } 2225 2226 @Override 2227 public void hide() { 2228 if (mEasyEditSpan != null) { 2229 mEasyEditSpan.setDeleteEnabled(false); 2230 } 2231 mOnDeleteListener = null; 2232 super.hide(); 2233 } 2234 2235 @Override 2236 protected int getTextOffset() { 2237 // Place the pop-up at the end of the span 2238 Editable editable = (Editable) mTextView.getText(); 2239 return editable.getSpanEnd(mEasyEditSpan); 2240 } 2241 2242 @Override 2243 protected int getVerticalLocalPosition(int line) { 2244 return mTextView.getLayout().getLineBottom(line); 2245 } 2246 2247 @Override 2248 protected int clipVertically(int positionY) { 2249 // As we display the pop-up below the span, no vertical clipping is required. 2250 return positionY; 2251 } 2252 } 2253 2254 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2255 // 3 handles 2256 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2257 // 1 CursorAnchorInfoNotifier 2258 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2259 private TextViewPositionListener[] mPositionListeners = 2260 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2261 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2262 private boolean mPositionHasChanged = true; 2263 // Absolute position of the TextView with respect to its parent window 2264 private int mPositionX, mPositionY; 2265 private int mNumberOfListeners; 2266 private boolean mScrollHasChanged; 2267 final int[] mTempCoords = new int[2]; 2268 2269 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2270 if (mNumberOfListeners == 0) { 2271 updatePosition(); 2272 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2273 vto.addOnPreDrawListener(this); 2274 } 2275 2276 int emptySlotIndex = -1; 2277 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2278 TextViewPositionListener listener = mPositionListeners[i]; 2279 if (listener == positionListener) { 2280 return; 2281 } else if (emptySlotIndex < 0 && listener == null) { 2282 emptySlotIndex = i; 2283 } 2284 } 2285 2286 mPositionListeners[emptySlotIndex] = positionListener; 2287 mCanMove[emptySlotIndex] = canMove; 2288 mNumberOfListeners++; 2289 } 2290 2291 public void removeSubscriber(TextViewPositionListener positionListener) { 2292 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2293 if (mPositionListeners[i] == positionListener) { 2294 mPositionListeners[i] = null; 2295 mNumberOfListeners--; 2296 break; 2297 } 2298 } 2299 2300 if (mNumberOfListeners == 0) { 2301 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2302 vto.removeOnPreDrawListener(this); 2303 } 2304 } 2305 2306 public int getPositionX() { 2307 return mPositionX; 2308 } 2309 2310 public int getPositionY() { 2311 return mPositionY; 2312 } 2313 2314 @Override 2315 public boolean onPreDraw() { 2316 updatePosition(); 2317 2318 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2319 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2320 TextViewPositionListener positionListener = mPositionListeners[i]; 2321 if (positionListener != null) { 2322 positionListener.updatePosition(mPositionX, mPositionY, 2323 mPositionHasChanged, mScrollHasChanged); 2324 } 2325 } 2326 } 2327 2328 mScrollHasChanged = false; 2329 return true; 2330 } 2331 2332 private void updatePosition() { 2333 mTextView.getLocationInWindow(mTempCoords); 2334 2335 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2336 2337 mPositionX = mTempCoords[0]; 2338 mPositionY = mTempCoords[1]; 2339 } 2340 2341 public void onScrollChanged() { 2342 mScrollHasChanged = true; 2343 } 2344 } 2345 2346 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2347 protected PopupWindow mPopupWindow; 2348 protected ViewGroup mContentView; 2349 int mPositionX, mPositionY; 2350 2351 protected abstract void createPopupWindow(); 2352 protected abstract void initContentView(); 2353 protected abstract int getTextOffset(); 2354 protected abstract int getVerticalLocalPosition(int line); 2355 protected abstract int clipVertically(int positionY); 2356 2357 public PinnedPopupWindow() { 2358 createPopupWindow(); 2359 2360 mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 2361 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2362 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2363 2364 initContentView(); 2365 2366 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2367 ViewGroup.LayoutParams.WRAP_CONTENT); 2368 mContentView.setLayoutParams(wrapContent); 2369 2370 mPopupWindow.setContentView(mContentView); 2371 } 2372 2373 public void show() { 2374 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2375 2376 computeLocalPosition(); 2377 2378 final PositionListener positionListener = getPositionListener(); 2379 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2380 } 2381 2382 protected void measureContent() { 2383 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2384 mContentView.measure( 2385 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2386 View.MeasureSpec.AT_MOST), 2387 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2388 View.MeasureSpec.AT_MOST)); 2389 } 2390 2391 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2392 * positioned according to viewportToContentHorizontalOffset. 2393 * 2394 * This method assumes that mContentView has properly been measured from its content. */ 2395 private void computeLocalPosition() { 2396 measureContent(); 2397 final int width = mContentView.getMeasuredWidth(); 2398 final int offset = getTextOffset(); 2399 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2400 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2401 2402 final int line = mTextView.getLayout().getLineForOffset(offset); 2403 mPositionY = getVerticalLocalPosition(line); 2404 mPositionY += mTextView.viewportToContentVerticalOffset(); 2405 } 2406 2407 private void updatePosition(int parentPositionX, int parentPositionY) { 2408 int positionX = parentPositionX + mPositionX; 2409 int positionY = parentPositionY + mPositionY; 2410 2411 positionY = clipVertically(positionY); 2412 2413 // Horizontal clipping 2414 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2415 final int width = mContentView.getMeasuredWidth(); 2416 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2417 positionX = Math.max(0, positionX); 2418 2419 if (isShowing()) { 2420 mPopupWindow.update(positionX, positionY, -1, -1); 2421 } else { 2422 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2423 positionX, positionY); 2424 } 2425 } 2426 2427 public void hide() { 2428 mPopupWindow.dismiss(); 2429 getPositionListener().removeSubscriber(this); 2430 } 2431 2432 @Override 2433 public void updatePosition(int parentPositionX, int parentPositionY, 2434 boolean parentPositionChanged, boolean parentScrolled) { 2435 // Either parentPositionChanged or parentScrolled is true, check if still visible 2436 if (isShowing() && isOffsetVisible(getTextOffset())) { 2437 if (parentScrolled) computeLocalPosition(); 2438 updatePosition(parentPositionX, parentPositionY); 2439 } else { 2440 hide(); 2441 } 2442 } 2443 2444 public boolean isShowing() { 2445 return mPopupWindow.isShowing(); 2446 } 2447 } 2448 2449 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2450 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2451 private static final int ADD_TO_DICTIONARY = -1; 2452 private static final int DELETE_TEXT = -2; 2453 private SuggestionInfo[] mSuggestionInfos; 2454 private int mNumberOfSuggestions; 2455 private boolean mCursorWasVisibleBeforeSuggestions; 2456 private boolean mIsShowingUp = false; 2457 private SuggestionAdapter mSuggestionsAdapter; 2458 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2459 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2460 2461 private class CustomPopupWindow extends PopupWindow { 2462 public CustomPopupWindow(Context context, int defStyleAttr) { 2463 super(context, null, defStyleAttr); 2464 } 2465 2466 @Override 2467 public void dismiss() { 2468 super.dismiss(); 2469 2470 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2471 2472 // Safe cast since show() checks that mTextView.getText() is an Editable 2473 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2474 2475 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2476 if (hasInsertionController()) { 2477 getInsertionController().show(); 2478 } 2479 } 2480 } 2481 2482 public SuggestionsPopupWindow() { 2483 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2484 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2485 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2486 } 2487 2488 @Override 2489 protected void createPopupWindow() { 2490 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2491 com.android.internal.R.attr.textSuggestionsWindowStyle); 2492 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2493 mPopupWindow.setFocusable(true); 2494 mPopupWindow.setClippingEnabled(false); 2495 } 2496 2497 @Override 2498 protected void initContentView() { 2499 ListView listView = new ListView(mTextView.getContext()); 2500 mSuggestionsAdapter = new SuggestionAdapter(); 2501 listView.setAdapter(mSuggestionsAdapter); 2502 listView.setOnItemClickListener(this); 2503 mContentView = listView; 2504 2505 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2506 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2507 for (int i = 0; i < mSuggestionInfos.length; i++) { 2508 mSuggestionInfos[i] = new SuggestionInfo(); 2509 } 2510 } 2511 2512 public boolean isShowingUp() { 2513 return mIsShowingUp; 2514 } 2515 2516 public void onParentLostFocus() { 2517 mIsShowingUp = false; 2518 } 2519 2520 private class SuggestionInfo { 2521 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2522 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2523 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2524 SpannableStringBuilder text = new SpannableStringBuilder(); 2525 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2526 android.R.style.TextAppearance_SuggestionHighlight); 2527 } 2528 2529 private class SuggestionAdapter extends BaseAdapter { 2530 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2531 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2532 2533 @Override 2534 public int getCount() { 2535 return mNumberOfSuggestions; 2536 } 2537 2538 @Override 2539 public Object getItem(int position) { 2540 return mSuggestionInfos[position]; 2541 } 2542 2543 @Override 2544 public long getItemId(int position) { 2545 return position; 2546 } 2547 2548 @Override 2549 public View getView(int position, View convertView, ViewGroup parent) { 2550 TextView textView = (TextView) convertView; 2551 2552 if (textView == null) { 2553 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2554 parent, false); 2555 } 2556 2557 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2558 textView.setText(suggestionInfo.text); 2559 2560 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2561 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2562 textView.setBackgroundColor(Color.TRANSPARENT); 2563 } else { 2564 textView.setBackgroundColor(Color.WHITE); 2565 } 2566 2567 return textView; 2568 } 2569 } 2570 2571 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2572 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2573 final int flag1 = span1.getFlags(); 2574 final int flag2 = span2.getFlags(); 2575 if (flag1 != flag2) { 2576 // The order here should match what is used in updateDrawState 2577 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2578 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2579 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2580 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2581 if (easy1 && !misspelled1) return -1; 2582 if (easy2 && !misspelled2) return 1; 2583 if (misspelled1) return -1; 2584 if (misspelled2) return 1; 2585 } 2586 2587 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2588 } 2589 } 2590 2591 /** 2592 * Returns the suggestion spans that cover the current cursor position. The suggestion 2593 * spans are sorted according to the length of text that they are attached to. 2594 */ 2595 private SuggestionSpan[] getSuggestionSpans() { 2596 int pos = mTextView.getSelectionStart(); 2597 Spannable spannable = (Spannable) mTextView.getText(); 2598 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2599 2600 mSpansLengths.clear(); 2601 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2602 int start = spannable.getSpanStart(suggestionSpan); 2603 int end = spannable.getSpanEnd(suggestionSpan); 2604 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2605 } 2606 2607 // The suggestions are sorted according to their types (easy correction first, then 2608 // misspelled) and to the length of the text that they cover (shorter first). 2609 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2610 return suggestionSpans; 2611 } 2612 2613 @Override 2614 public void show() { 2615 if (!(mTextView.getText() instanceof Editable)) return; 2616 2617 if (updateSuggestions()) { 2618 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2619 mTextView.setCursorVisible(false); 2620 mIsShowingUp = true; 2621 super.show(); 2622 } 2623 } 2624 2625 @Override 2626 protected void measureContent() { 2627 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2628 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2629 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2630 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2631 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2632 2633 int width = 0; 2634 View view = null; 2635 for (int i = 0; i < mNumberOfSuggestions; i++) { 2636 view = mSuggestionsAdapter.getView(i, view, mContentView); 2637 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2638 view.measure(horizontalMeasure, verticalMeasure); 2639 width = Math.max(width, view.getMeasuredWidth()); 2640 } 2641 2642 // Enforce the width based on actual text widths 2643 mContentView.measure( 2644 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2645 verticalMeasure); 2646 2647 Drawable popupBackground = mPopupWindow.getBackground(); 2648 if (popupBackground != null) { 2649 if (mTempRect == null) mTempRect = new Rect(); 2650 popupBackground.getPadding(mTempRect); 2651 width += mTempRect.left + mTempRect.right; 2652 } 2653 mPopupWindow.setWidth(width); 2654 } 2655 2656 @Override 2657 protected int getTextOffset() { 2658 return mTextView.getSelectionStart(); 2659 } 2660 2661 @Override 2662 protected int getVerticalLocalPosition(int line) { 2663 return mTextView.getLayout().getLineBottom(line); 2664 } 2665 2666 @Override 2667 protected int clipVertically(int positionY) { 2668 final int height = mContentView.getMeasuredHeight(); 2669 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2670 return Math.min(positionY, displayMetrics.heightPixels - height); 2671 } 2672 2673 @Override 2674 public void hide() { 2675 super.hide(); 2676 } 2677 2678 private boolean updateSuggestions() { 2679 Spannable spannable = (Spannable) mTextView.getText(); 2680 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2681 2682 final int nbSpans = suggestionSpans.length; 2683 // Suggestions are shown after a delay: the underlying spans may have been removed 2684 if (nbSpans == 0) return false; 2685 2686 mNumberOfSuggestions = 0; 2687 int spanUnionStart = mTextView.getText().length(); 2688 int spanUnionEnd = 0; 2689 2690 SuggestionSpan misspelledSpan = null; 2691 int underlineColor = 0; 2692 2693 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2694 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2695 final int spanStart = spannable.getSpanStart(suggestionSpan); 2696 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2697 spanUnionStart = Math.min(spanStart, spanUnionStart); 2698 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2699 2700 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2701 misspelledSpan = suggestionSpan; 2702 } 2703 2704 // The first span dictates the background color of the highlighted text 2705 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2706 2707 String[] suggestions = suggestionSpan.getSuggestions(); 2708 int nbSuggestions = suggestions.length; 2709 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2710 String suggestion = suggestions[suggestionIndex]; 2711 2712 boolean suggestionIsDuplicate = false; 2713 for (int i = 0; i < mNumberOfSuggestions; i++) { 2714 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2715 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2716 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2717 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2718 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2719 suggestionIsDuplicate = true; 2720 break; 2721 } 2722 } 2723 } 2724 2725 if (!suggestionIsDuplicate) { 2726 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2727 suggestionInfo.suggestionSpan = suggestionSpan; 2728 suggestionInfo.suggestionIndex = suggestionIndex; 2729 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2730 2731 mNumberOfSuggestions++; 2732 2733 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2734 // Also end outer for loop 2735 spanIndex = nbSpans; 2736 break; 2737 } 2738 } 2739 } 2740 } 2741 2742 for (int i = 0; i < mNumberOfSuggestions; i++) { 2743 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2744 } 2745 2746 // Add "Add to dictionary" item if there is a span with the misspelled flag 2747 if (misspelledSpan != null) { 2748 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2749 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2750 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2751 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2752 suggestionInfo.suggestionSpan = misspelledSpan; 2753 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2754 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2755 getContext().getString(com.android.internal.R.string.addToDictionary)); 2756 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2757 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2758 2759 mNumberOfSuggestions++; 2760 } 2761 } 2762 2763 // Delete item 2764 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2765 suggestionInfo.suggestionSpan = null; 2766 suggestionInfo.suggestionIndex = DELETE_TEXT; 2767 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2768 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2769 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2770 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2771 mNumberOfSuggestions++; 2772 2773 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2774 if (underlineColor == 0) { 2775 // Fallback on the default highlight color when the first span does not provide one 2776 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2777 } else { 2778 final float BACKGROUND_TRANSPARENCY = 0.4f; 2779 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2780 mSuggestionRangeSpan.setBackgroundColor( 2781 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2782 } 2783 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2784 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2785 2786 mSuggestionsAdapter.notifyDataSetChanged(); 2787 return true; 2788 } 2789 2790 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2791 int unionEnd) { 2792 final Spannable text = (Spannable) mTextView.getText(); 2793 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2794 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2795 2796 // Adjust the start/end of the suggestion span 2797 suggestionInfo.suggestionStart = spanStart - unionStart; 2798 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2799 + suggestionInfo.text.length(); 2800 2801 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2802 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2803 2804 // Add the text before and after the span. 2805 final String textAsString = text.toString(); 2806 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2807 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2808 } 2809 2810 @Override 2811 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2812 Editable editable = (Editable) mTextView.getText(); 2813 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2814 2815 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2816 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2817 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2818 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2819 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2820 if (spanUnionEnd < editable.length() && 2821 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2822 (spanUnionStart == 0 || 2823 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2824 spanUnionEnd = spanUnionEnd + 1; 2825 } 2826 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2827 } 2828 hide(); 2829 return; 2830 } 2831 2832 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2833 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2834 if (spanStart < 0 || spanEnd <= spanStart) { 2835 // Span has been removed 2836 hide(); 2837 return; 2838 } 2839 2840 final String originalText = editable.toString().substring(spanStart, spanEnd); 2841 2842 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2843 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2844 intent.putExtra("word", originalText); 2845 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2846 // Put a listener to replace the original text with a word which the user 2847 // modified in a user dictionary dialog. 2848 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2849 mTextView.getContext().startActivity(intent); 2850 // There is no way to know if the word was indeed added. Re-check. 2851 // TODO The ExtractEditText should remove the span in the original text instead 2852 editable.removeSpan(suggestionInfo.suggestionSpan); 2853 Selection.setSelection(editable, spanEnd); 2854 updateSpellCheckSpans(spanStart, spanEnd, false); 2855 } else { 2856 // SuggestionSpans are removed by replace: save them before 2857 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2858 SuggestionSpan.class); 2859 final int length = suggestionSpans.length; 2860 int[] suggestionSpansStarts = new int[length]; 2861 int[] suggestionSpansEnds = new int[length]; 2862 int[] suggestionSpansFlags = new int[length]; 2863 for (int i = 0; i < length; i++) { 2864 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2865 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2866 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2867 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2868 2869 // Remove potential misspelled flags 2870 int suggestionSpanFlags = suggestionSpan.getFlags(); 2871 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2872 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2873 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2874 suggestionSpan.setFlags(suggestionSpanFlags); 2875 } 2876 } 2877 2878 final int suggestionStart = suggestionInfo.suggestionStart; 2879 final int suggestionEnd = suggestionInfo.suggestionEnd; 2880 final String suggestion = suggestionInfo.text.subSequence( 2881 suggestionStart, suggestionEnd).toString(); 2882 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2883 2884 // Notify source IME of the suggestion pick. Do this before 2885 // swaping texts. 2886 suggestionInfo.suggestionSpan.notifySelection( 2887 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 2888 2889 // Swap text content between actual text and Suggestion span 2890 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 2891 suggestions[suggestionInfo.suggestionIndex] = originalText; 2892 2893 // Restore previous SuggestionSpans 2894 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 2895 for (int i = 0; i < length; i++) { 2896 // Only spans that include the modified region make sense after replacement 2897 // Spans partially included in the replaced region are removed, there is no 2898 // way to assign them a valid range after replacement 2899 if (suggestionSpansStarts[i] <= spanStart && 2900 suggestionSpansEnds[i] >= spanEnd) { 2901 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2902 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 2903 } 2904 } 2905 2906 // Move cursor at the end of the replaced word 2907 final int newCursorPosition = spanEnd + lengthDifference; 2908 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2909 } 2910 2911 hide(); 2912 } 2913 } 2914 2915 /** 2916 * An ActionMode Callback class that is used to provide actions while in text selection mode. 2917 * 2918 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 2919 * on which of these this TextView supports. 2920 */ 2921 private class SelectionActionModeCallback implements ActionMode.Callback { 2922 2923 @Override 2924 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 2925 final boolean legacy = mTextView.getContext().getApplicationInfo().targetSdkVersion < 2926 Build.VERSION_CODES.LOLLIPOP; 2927 final Context context = !legacy && menu instanceof MenuBuilder ? 2928 ((MenuBuilder) menu).getContext() : 2929 mTextView.getContext(); 2930 final TypedArray styledAttributes = context.obtainStyledAttributes( 2931 com.android.internal.R.styleable.SelectionModeDrawables); 2932 2933 mode.setTitle(mTextView.getContext().getString( 2934 com.android.internal.R.string.textSelectionCABTitle)); 2935 mode.setSubtitle(null); 2936 mode.setTitleOptionalHint(true); 2937 2938 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 2939 setIcon(styledAttributes.getResourceId( 2940 R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0)). 2941 setAlphabeticShortcut('a'). 2942 setShowAsAction( 2943 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2944 2945 if (mTextView.canCut()) { 2946 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 2947 setIcon(styledAttributes.getResourceId( 2948 R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)). 2949 setAlphabeticShortcut('x'). 2950 setShowAsAction( 2951 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2952 } 2953 2954 if (mTextView.canCopy()) { 2955 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 2956 setIcon(styledAttributes.getResourceId( 2957 R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)). 2958 setAlphabeticShortcut('c'). 2959 setShowAsAction( 2960 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2961 } 2962 2963 if (mTextView.canPaste()) { 2964 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 2965 setIcon(styledAttributes.getResourceId( 2966 R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)). 2967 setAlphabeticShortcut('v'). 2968 setShowAsAction( 2969 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2970 } 2971 2972 if (mTextView.isSuggestionsEnabled() && isCursorInsideSuggestionSpan()) { 2973 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 2974 setShowAsAction( 2975 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2976 } 2977 2978 styledAttributes.recycle(); 2979 2980 if (mCustomSelectionActionModeCallback != null) { 2981 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 2982 // The custom mode can choose to cancel the action mode 2983 return false; 2984 } 2985 } 2986 2987 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 2988 mTextView.setHasTransientState(true); 2989 return true; 2990 } else { 2991 return false; 2992 } 2993 } 2994 2995 @Override 2996 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 2997 if (mCustomSelectionActionModeCallback != null) { 2998 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 2999 } 3000 return true; 3001 } 3002 3003 @Override 3004 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3005 if (mCustomSelectionActionModeCallback != null && 3006 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3007 return true; 3008 } 3009 if (item.getItemId() == TextView.ID_REPLACE) { 3010 onReplace(); 3011 return true; 3012 } 3013 return mTextView.onTextContextMenuItem(item.getItemId()); 3014 } 3015 3016 @Override 3017 public void onDestroyActionMode(ActionMode mode) { 3018 if (mCustomSelectionActionModeCallback != null) { 3019 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3020 } 3021 3022 /* 3023 * If we're ending this mode because we're detaching from a window, 3024 * we still have selection state to preserve. Don't clear it, we'll 3025 * bring back the selection mode when (if) we get reattached. 3026 */ 3027 if (!mPreserveDetachedSelection) { 3028 Selection.setSelection((Spannable) mTextView.getText(), 3029 mTextView.getSelectionEnd()); 3030 mTextView.setHasTransientState(false); 3031 } 3032 3033 if (mSelectionModifierCursorController != null) { 3034 mSelectionModifierCursorController.hide(); 3035 } 3036 3037 mSelectionActionMode = null; 3038 } 3039 } 3040 3041 private void onReplace() { 3042 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3043 stopSelectionActionMode(); 3044 Selection.setSelection((Spannable) mTextView.getText(), middle); 3045 showSuggestions(); 3046 } 3047 3048 private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener { 3049 private static final int POPUP_TEXT_LAYOUT = 3050 com.android.internal.R.layout.text_edit_action_popup_text; 3051 private TextView mPasteTextView; 3052 private TextView mReplaceTextView; 3053 3054 @Override 3055 protected void createPopupWindow() { 3056 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 3057 com.android.internal.R.attr.textSelectHandleWindowStyle); 3058 mPopupWindow.setClippingEnabled(true); 3059 } 3060 3061 @Override 3062 protected void initContentView() { 3063 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 3064 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 3065 mContentView = linearLayout; 3066 mContentView.setBackgroundResource( 3067 com.android.internal.R.drawable.text_edit_paste_window); 3068 3069 LayoutInflater inflater = (LayoutInflater) mTextView.getContext(). 3070 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 3071 3072 LayoutParams wrapContent = new LayoutParams( 3073 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 3074 3075 mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 3076 mPasteTextView.setLayoutParams(wrapContent); 3077 mContentView.addView(mPasteTextView); 3078 mPasteTextView.setText(com.android.internal.R.string.paste); 3079 mPasteTextView.setOnClickListener(this); 3080 3081 mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 3082 mReplaceTextView.setLayoutParams(wrapContent); 3083 mContentView.addView(mReplaceTextView); 3084 mReplaceTextView.setText(com.android.internal.R.string.replace); 3085 mReplaceTextView.setOnClickListener(this); 3086 } 3087 3088 @Override 3089 public void show() { 3090 boolean canPaste = mTextView.canPaste(); 3091 boolean canSuggest = mTextView.isSuggestionsEnabled() && isCursorInsideSuggestionSpan(); 3092 mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE); 3093 mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE); 3094 3095 if (!canPaste && !canSuggest) return; 3096 3097 super.show(); 3098 } 3099 3100 @Override 3101 public void onClick(View view) { 3102 if (view == mPasteTextView && mTextView.canPaste()) { 3103 mTextView.onTextContextMenuItem(TextView.ID_PASTE); 3104 hide(); 3105 } else if (view == mReplaceTextView) { 3106 onReplace(); 3107 } 3108 } 3109 3110 @Override 3111 protected int getTextOffset() { 3112 return (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3113 } 3114 3115 @Override 3116 protected int getVerticalLocalPosition(int line) { 3117 return mTextView.getLayout().getLineTop(line) - mContentView.getMeasuredHeight(); 3118 } 3119 3120 @Override 3121 protected int clipVertically(int positionY) { 3122 if (positionY < 0) { 3123 final int offset = getTextOffset(); 3124 final Layout layout = mTextView.getLayout(); 3125 final int line = layout.getLineForOffset(offset); 3126 positionY += layout.getLineBottom(line) - layout.getLineTop(line); 3127 positionY += mContentView.getMeasuredHeight(); 3128 3129 // Assumes insertion and selection handles share the same height 3130 final Drawable handle = mTextView.getContext().getDrawable( 3131 mTextView.mTextSelectHandleRes); 3132 positionY += handle.getIntrinsicHeight(); 3133 } 3134 3135 return positionY; 3136 } 3137 } 3138 3139 /** 3140 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3141 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3142 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3143 */ 3144 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3145 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3146 final int[] mTmpIntOffset = new int[2]; 3147 final Matrix mViewToScreenMatrix = new Matrix(); 3148 3149 @Override 3150 public void updatePosition(int parentPositionX, int parentPositionY, 3151 boolean parentPositionChanged, boolean parentScrolled) { 3152 final InputMethodState ims = mInputMethodState; 3153 if (ims == null || ims.mBatchEditNesting > 0) { 3154 return; 3155 } 3156 final InputMethodManager imm = InputMethodManager.peekInstance(); 3157 if (null == imm) { 3158 return; 3159 } 3160 if (!imm.isActive(mTextView)) { 3161 return; 3162 } 3163 // Skip if the IME has not requested the cursor/anchor position. 3164 if (!imm.isCursorAnchorInfoEnabled()) { 3165 return; 3166 } 3167 Layout layout = mTextView.getLayout(); 3168 if (layout == null) { 3169 return; 3170 } 3171 3172 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3173 builder.reset(); 3174 3175 final int selectionStart = mTextView.getSelectionStart(); 3176 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3177 3178 // Construct transformation matrix from view local coordinates to screen coordinates. 3179 mViewToScreenMatrix.set(mTextView.getMatrix()); 3180 mTextView.getLocationOnScreen(mTmpIntOffset); 3181 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3182 builder.setMatrix(mViewToScreenMatrix); 3183 3184 final float viewportToContentHorizontalOffset = 3185 mTextView.viewportToContentHorizontalOffset(); 3186 final float viewportToContentVerticalOffset = 3187 mTextView.viewportToContentVerticalOffset(); 3188 3189 final CharSequence text = mTextView.getText(); 3190 if (text instanceof Spannable) { 3191 final Spannable sp = (Spannable) text; 3192 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3193 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3194 if (composingTextEnd < composingTextStart) { 3195 final int temp = composingTextEnd; 3196 composingTextEnd = composingTextStart; 3197 composingTextStart = temp; 3198 } 3199 final boolean hasComposingText = 3200 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3201 if (hasComposingText) { 3202 final CharSequence composingText = text.subSequence(composingTextStart, 3203 composingTextEnd); 3204 builder.setComposingText(composingTextStart, composingText); 3205 3206 final int minLine = layout.getLineForOffset(composingTextStart); 3207 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3208 for (int line = minLine; line <= maxLine; ++line) { 3209 final int lineStart = layout.getLineStart(line); 3210 final int lineEnd = layout.getLineEnd(line); 3211 final int offsetStart = Math.max(lineStart, composingTextStart); 3212 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3213 final boolean ltrLine = 3214 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3215 final float[] widths = new float[offsetEnd - offsetStart]; 3216 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3217 final float top = layout.getLineTop(line); 3218 final float bottom = layout.getLineBottom(line); 3219 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3220 final float charWidth = widths[offset - offsetStart]; 3221 final boolean isRtl = layout.isRtlCharAt(offset); 3222 final float primary = layout.getPrimaryHorizontal(offset); 3223 final float secondary = layout.getSecondaryHorizontal(offset); 3224 // TODO: This doesn't work perfectly for text with custom styles and 3225 // TAB chars. 3226 final float left; 3227 final float right; 3228 if (ltrLine) { 3229 if (isRtl) { 3230 left = secondary - charWidth; 3231 right = secondary; 3232 } else { 3233 left = primary; 3234 right = primary + charWidth; 3235 } 3236 } else { 3237 if (!isRtl) { 3238 left = secondary; 3239 right = secondary + charWidth; 3240 } else { 3241 left = primary - charWidth; 3242 right = primary; 3243 } 3244 } 3245 // TODO: Check top-right and bottom-left as well. 3246 final float localLeft = left + viewportToContentHorizontalOffset; 3247 final float localRight = right + viewportToContentHorizontalOffset; 3248 final float localTop = top + viewportToContentVerticalOffset; 3249 final float localBottom = bottom + viewportToContentVerticalOffset; 3250 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3251 final boolean isBottomRightVisible = 3252 isPositionVisible(localRight, localBottom); 3253 int characterBoundsFlags = 0; 3254 if (isTopLeftVisible || isBottomRightVisible) { 3255 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3256 } 3257 if (!isTopLeftVisible || !isTopLeftVisible) { 3258 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3259 } 3260 if (isRtl) { 3261 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3262 } 3263 // Here offset is the index in Java chars. 3264 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3265 localBottom, characterBoundsFlags); 3266 } 3267 } 3268 } 3269 } 3270 3271 // Treat selectionStart as the insertion point. 3272 if (0 <= selectionStart) { 3273 final int offset = selectionStart; 3274 final int line = layout.getLineForOffset(offset); 3275 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3276 + viewportToContentHorizontalOffset; 3277 final float insertionMarkerTop = layout.getLineTop(line) 3278 + viewportToContentVerticalOffset; 3279 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3280 + viewportToContentVerticalOffset; 3281 final float insertionMarkerBottom = layout.getLineBottom(line) 3282 + viewportToContentVerticalOffset; 3283 final boolean isTopVisible = 3284 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3285 final boolean isBottomVisible = 3286 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3287 int insertionMarkerFlags = 0; 3288 if (isTopVisible || isBottomVisible) { 3289 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3290 } 3291 if (!isTopVisible || !isBottomVisible) { 3292 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3293 } 3294 if (layout.isRtlCharAt(offset)) { 3295 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3296 } 3297 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3298 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3299 } 3300 3301 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3302 } 3303 } 3304 3305 private abstract class HandleView extends View implements TextViewPositionListener { 3306 protected Drawable mDrawable; 3307 protected Drawable mDrawableLtr; 3308 protected Drawable mDrawableRtl; 3309 private final PopupWindow mContainer; 3310 // Position with respect to the parent TextView 3311 private int mPositionX, mPositionY; 3312 private boolean mIsDragging; 3313 // Offset from touch position to mPosition 3314 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3315 protected int mHotspotX; 3316 protected int mHorizontalGravity; 3317 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3318 private float mTouchOffsetY; 3319 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3320 private float mIdealVerticalOffset; 3321 // Parent's (TextView) previous position in window 3322 private int mLastParentX, mLastParentY; 3323 // Transient action popup window for Paste and Replace actions 3324 protected ActionPopupWindow mActionPopupWindow; 3325 // Previous text character offset 3326 private int mPreviousOffset = -1; 3327 // Previous text character offset 3328 private boolean mPositionHasChanged = true; 3329 // Used to delay the appearance of the action popup window 3330 private Runnable mActionPopupShower; 3331 // Minimum touch target size for handles 3332 private int mMinSize; 3333 // Indicates the line of text that the handle is on. 3334 protected int mPrevLine = -1; 3335 3336 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3337 super(mTextView.getContext()); 3338 mContainer = new PopupWindow(mTextView.getContext(), null, 3339 com.android.internal.R.attr.textSelectHandleWindowStyle); 3340 mContainer.setSplitTouchEnabled(true); 3341 mContainer.setClippingEnabled(false); 3342 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3343 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3344 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3345 mContainer.setContentView(this); 3346 3347 mDrawableLtr = drawableLtr; 3348 mDrawableRtl = drawableRtl; 3349 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3350 com.android.internal.R.dimen.text_handle_min_size); 3351 3352 updateDrawable(); 3353 3354 final int handleHeight = getPreferredHeight(); 3355 mTouchOffsetY = -0.3f * handleHeight; 3356 mIdealVerticalOffset = 0.7f * handleHeight; 3357 } 3358 3359 protected void updateDrawable() { 3360 final int offset = getCurrentCursorOffset(); 3361 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3362 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3363 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3364 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3365 } 3366 3367 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3368 protected abstract int getHorizontalGravity(boolean isRtlRun); 3369 3370 // Touch-up filter: number of previous positions remembered 3371 private static final int HISTORY_SIZE = 5; 3372 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3373 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3374 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3375 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3376 private int mPreviousOffsetIndex = 0; 3377 private int mNumberPreviousOffsets = 0; 3378 3379 private void startTouchUpFilter(int offset) { 3380 mNumberPreviousOffsets = 0; 3381 addPositionToTouchUpFilter(offset); 3382 } 3383 3384 private void addPositionToTouchUpFilter(int offset) { 3385 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3386 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3387 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3388 mNumberPreviousOffsets++; 3389 } 3390 3391 private void filterOnTouchUp() { 3392 final long now = SystemClock.uptimeMillis(); 3393 int i = 0; 3394 int index = mPreviousOffsetIndex; 3395 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3396 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3397 i++; 3398 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3399 } 3400 3401 if (i > 0 && i < iMax && 3402 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3403 positionAtCursorOffset(mPreviousOffsets[index], false); 3404 } 3405 } 3406 3407 public boolean offsetHasBeenChanged() { 3408 return mNumberPreviousOffsets > 1; 3409 } 3410 3411 @Override 3412 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3413 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3414 } 3415 3416 private int getPreferredWidth() { 3417 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3418 } 3419 3420 private int getPreferredHeight() { 3421 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3422 } 3423 3424 public void show() { 3425 if (isShowing()) return; 3426 3427 getPositionListener().addSubscriber(this, true /* local position may change */); 3428 3429 // Make sure the offset is always considered new, even when focusing at same position 3430 mPreviousOffset = -1; 3431 positionAtCursorOffset(getCurrentCursorOffset(), false); 3432 3433 hideActionPopupWindow(); 3434 } 3435 3436 protected void dismiss() { 3437 mIsDragging = false; 3438 mContainer.dismiss(); 3439 onDetached(); 3440 } 3441 3442 public void hide() { 3443 dismiss(); 3444 3445 getPositionListener().removeSubscriber(this); 3446 } 3447 3448 void showActionPopupWindow(int delay) { 3449 if (mActionPopupWindow == null) { 3450 mActionPopupWindow = new ActionPopupWindow(); 3451 } 3452 if (mActionPopupShower == null) { 3453 mActionPopupShower = new Runnable() { 3454 public void run() { 3455 mActionPopupWindow.show(); 3456 } 3457 }; 3458 } else { 3459 mTextView.removeCallbacks(mActionPopupShower); 3460 } 3461 mTextView.postDelayed(mActionPopupShower, delay); 3462 } 3463 3464 protected void hideActionPopupWindow() { 3465 if (mActionPopupShower != null) { 3466 mTextView.removeCallbacks(mActionPopupShower); 3467 } 3468 if (mActionPopupWindow != null) { 3469 mActionPopupWindow.hide(); 3470 } 3471 } 3472 3473 public boolean isShowing() { 3474 return mContainer.isShowing(); 3475 } 3476 3477 private boolean isVisible() { 3478 // Always show a dragging handle. 3479 if (mIsDragging) { 3480 return true; 3481 } 3482 3483 if (mTextView.isInBatchEditMode()) { 3484 return false; 3485 } 3486 3487 return isPositionVisible(mPositionX + mHotspotX, mPositionY); 3488 } 3489 3490 public abstract int getCurrentCursorOffset(); 3491 3492 protected abstract void updateSelection(int offset); 3493 3494 public abstract void updatePosition(float x, float y); 3495 3496 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3497 // A HandleView relies on the layout, which may be nulled by external methods 3498 Layout layout = mTextView.getLayout(); 3499 if (layout == null) { 3500 // Will update controllers' state, hiding them and stopping selection mode if needed 3501 prepareCursorControllers(); 3502 return; 3503 } 3504 3505 boolean offsetChanged = offset != mPreviousOffset; 3506 if (offsetChanged || parentScrolled) { 3507 if (offsetChanged) { 3508 updateSelection(offset); 3509 addPositionToTouchUpFilter(offset); 3510 } 3511 final int line = layout.getLineForOffset(offset); 3512 mPrevLine = line; 3513 3514 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3515 getHorizontalOffset() + getCursorOffset()); 3516 mPositionY = layout.getLineBottom(line); 3517 3518 // Take TextView's padding and scroll into account. 3519 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3520 mPositionY += mTextView.viewportToContentVerticalOffset(); 3521 3522 mPreviousOffset = offset; 3523 mPositionHasChanged = true; 3524 } 3525 } 3526 3527 public void updatePosition(int parentPositionX, int parentPositionY, 3528 boolean parentPositionChanged, boolean parentScrolled) { 3529 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3530 if (parentPositionChanged || mPositionHasChanged) { 3531 if (mIsDragging) { 3532 // Update touchToWindow offset in case of parent scrolling while dragging 3533 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3534 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3535 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3536 mLastParentX = parentPositionX; 3537 mLastParentY = parentPositionY; 3538 } 3539 3540 onHandleMoved(); 3541 } 3542 3543 if (isVisible()) { 3544 final int positionX = parentPositionX + mPositionX; 3545 final int positionY = parentPositionY + mPositionY; 3546 if (isShowing()) { 3547 mContainer.update(positionX, positionY, -1, -1); 3548 } else { 3549 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3550 positionX, positionY); 3551 } 3552 } else { 3553 if (isShowing()) { 3554 dismiss(); 3555 } 3556 } 3557 3558 mPositionHasChanged = false; 3559 } 3560 } 3561 3562 public void showAtLocation(int offset) { 3563 // TODO - investigate if there's a better way to show the handles 3564 // after the drag accelerator has occured. 3565 int[] tmpCords = new int[2]; 3566 mTextView.getLocationInWindow(tmpCords); 3567 3568 Layout layout = mTextView.getLayout(); 3569 int posX = tmpCords[0]; 3570 int posY = tmpCords[1]; 3571 3572 final int line = layout.getLineForOffset(offset); 3573 3574 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3575 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3576 int startY = layout.getLineBottom(line); 3577 3578 // Take TextView's padding and scroll into account. 3579 startX += mTextView.viewportToContentHorizontalOffset(); 3580 startY += mTextView.viewportToContentVerticalOffset(); 3581 3582 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3583 startX + posX, startY + posY); 3584 } 3585 3586 @Override 3587 protected void onDraw(Canvas c) { 3588 final int drawWidth = mDrawable.getIntrinsicWidth(); 3589 final int left = getHorizontalOffset(); 3590 3591 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3592 mDrawable.draw(c); 3593 } 3594 3595 private int getHorizontalOffset() { 3596 final int width = getPreferredWidth(); 3597 final int drawWidth = mDrawable.getIntrinsicWidth(); 3598 final int left; 3599 switch (mHorizontalGravity) { 3600 case Gravity.LEFT: 3601 left = 0; 3602 break; 3603 default: 3604 case Gravity.CENTER: 3605 left = (width - drawWidth) / 2; 3606 break; 3607 case Gravity.RIGHT: 3608 left = width - drawWidth; 3609 break; 3610 } 3611 return left; 3612 } 3613 3614 protected int getCursorOffset() { 3615 return 0; 3616 } 3617 3618 @Override 3619 public boolean onTouchEvent(MotionEvent ev) { 3620 switch (ev.getActionMasked()) { 3621 case MotionEvent.ACTION_DOWN: { 3622 startTouchUpFilter(getCurrentCursorOffset()); 3623 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3624 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3625 3626 final PositionListener positionListener = getPositionListener(); 3627 mLastParentX = positionListener.getPositionX(); 3628 mLastParentY = positionListener.getPositionY(); 3629 mIsDragging = true; 3630 break; 3631 } 3632 3633 case MotionEvent.ACTION_MOVE: { 3634 final float rawX = ev.getRawX(); 3635 final float rawY = ev.getRawY(); 3636 3637 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3638 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3639 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3640 float newVerticalOffset; 3641 if (previousVerticalOffset < mIdealVerticalOffset) { 3642 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3643 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3644 } else { 3645 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3646 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3647 } 3648 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3649 3650 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3651 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3652 3653 updatePosition(newPosX, newPosY); 3654 break; 3655 } 3656 3657 case MotionEvent.ACTION_UP: 3658 filterOnTouchUp(); 3659 mIsDragging = false; 3660 break; 3661 3662 case MotionEvent.ACTION_CANCEL: 3663 mIsDragging = false; 3664 break; 3665 } 3666 return true; 3667 } 3668 3669 public boolean isDragging() { 3670 return mIsDragging; 3671 } 3672 3673 void onHandleMoved() { 3674 hideActionPopupWindow(); 3675 } 3676 3677 public void onDetached() { 3678 hideActionPopupWindow(); 3679 } 3680 } 3681 3682 private class InsertionHandleView extends HandleView { 3683 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3684 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3685 3686 // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow 3687 private float mDownPositionX, mDownPositionY; 3688 private Runnable mHider; 3689 3690 public InsertionHandleView(Drawable drawable) { 3691 super(drawable, drawable); 3692 } 3693 3694 @Override 3695 public void show() { 3696 super.show(); 3697 3698 final long durationSinceCutOrCopy = 3699 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3700 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3701 showActionPopupWindow(0); 3702 } 3703 3704 hideAfterDelay(); 3705 } 3706 3707 public void showWithActionPopup() { 3708 show(); 3709 showActionPopupWindow(0); 3710 } 3711 3712 private void hideAfterDelay() { 3713 if (mHider == null) { 3714 mHider = new Runnable() { 3715 public void run() { 3716 hide(); 3717 } 3718 }; 3719 } else { 3720 removeHiderCallback(); 3721 } 3722 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3723 } 3724 3725 private void removeHiderCallback() { 3726 if (mHider != null) { 3727 mTextView.removeCallbacks(mHider); 3728 } 3729 } 3730 3731 @Override 3732 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3733 return drawable.getIntrinsicWidth() / 2; 3734 } 3735 3736 @Override 3737 protected int getHorizontalGravity(boolean isRtlRun) { 3738 return Gravity.CENTER_HORIZONTAL; 3739 } 3740 3741 @Override 3742 protected int getCursorOffset() { 3743 int offset = super.getCursorOffset(); 3744 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3745 if (cursor != null) { 3746 cursor.getPadding(mTempRect); 3747 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3748 } 3749 return offset; 3750 } 3751 3752 @Override 3753 public boolean onTouchEvent(MotionEvent ev) { 3754 final boolean result = super.onTouchEvent(ev); 3755 3756 switch (ev.getActionMasked()) { 3757 case MotionEvent.ACTION_DOWN: 3758 mDownPositionX = ev.getRawX(); 3759 mDownPositionY = ev.getRawY(); 3760 break; 3761 3762 case MotionEvent.ACTION_UP: 3763 if (!offsetHasBeenChanged()) { 3764 final float deltaX = mDownPositionX - ev.getRawX(); 3765 final float deltaY = mDownPositionY - ev.getRawY(); 3766 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3767 3768 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3769 mTextView.getContext()); 3770 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3771 3772 if (distanceSquared < touchSlop * touchSlop) { 3773 if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) { 3774 // Tapping on the handle dismisses the displayed action popup 3775 mActionPopupWindow.hide(); 3776 } else { 3777 showWithActionPopup(); 3778 } 3779 } 3780 } 3781 hideAfterDelay(); 3782 break; 3783 3784 case MotionEvent.ACTION_CANCEL: 3785 hideAfterDelay(); 3786 break; 3787 3788 default: 3789 break; 3790 } 3791 3792 return result; 3793 } 3794 3795 @Override 3796 public int getCurrentCursorOffset() { 3797 return mTextView.getSelectionStart(); 3798 } 3799 3800 @Override 3801 public void updateSelection(int offset) { 3802 Selection.setSelection((Spannable) mTextView.getText(), offset); 3803 } 3804 3805 @Override 3806 public void updatePosition(float x, float y) { 3807 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3808 } 3809 3810 @Override 3811 void onHandleMoved() { 3812 super.onHandleMoved(); 3813 removeHiderCallback(); 3814 } 3815 3816 @Override 3817 public void onDetached() { 3818 super.onDetached(); 3819 removeHiderCallback(); 3820 } 3821 } 3822 3823 private class SelectionStartHandleView extends HandleView { 3824 // The previous offset this handle was at. 3825 private int mPrevOffset; 3826 // Indicates whether the cursor is making adjustments within a word. 3827 private boolean mInWord = false; 3828 // Offset to track difference between touch and word boundary. 3829 protected int mTouchWordOffset; 3830 3831 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3832 super(drawableLtr, drawableRtl); 3833 } 3834 3835 @Override 3836 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3837 return isRtlRun ? 0 : drawable.getIntrinsicWidth(); 3838 } 3839 3840 @Override 3841 protected int getHorizontalGravity(boolean isRtlRun) { 3842 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 3843 } 3844 3845 @Override 3846 public int getCurrentCursorOffset() { 3847 return mTextView.getSelectionStart(); 3848 } 3849 3850 @Override 3851 public void updateSelection(int offset) { 3852 Selection.setSelection((Spannable) mTextView.getText(), offset, 3853 mTextView.getSelectionEnd()); 3854 updateDrawable(); 3855 } 3856 3857 @Override 3858 public void updatePosition(float x, float y) { 3859 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3860 final int currLine = mTextView.getLineAtCoordinate(y); 3861 3862 // Don't select white space on different lines. 3863 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 3864 3865 boolean positionCursor = false; 3866 int offset = trueOffset; 3867 int end = getWordEnd(offset, true); 3868 int start = getWordStart(offset); 3869 3870 if (offset < mPrevOffset) { 3871 // User is increasing the selection. 3872 if (!mInWord || currLine < mPrevLine) { 3873 // We're not in a word, or we're on a different line so we'll expand by 3874 // word. First ensure the user has at least entered the next word. 3875 int offsetToWord = Math.min((end - start) / 2, 2); 3876 if (offset <= end - offsetToWord || currLine < mPrevLine) { 3877 offset = start; 3878 } else { 3879 offset = mPrevOffset; 3880 } 3881 } 3882 mPrevOffset = offset; 3883 mTouchWordOffset = Math.max(trueOffset - offset, 0); 3884 mInWord = !isStartBoundary(offset); 3885 positionCursor = true; 3886 } else if (offset - mTouchWordOffset > mPrevOffset) { 3887 // User is shrinking the selection. 3888 if (currLine > mPrevLine) { 3889 // We're on a different line, so we'll snap to word boundaries. 3890 offset = end; 3891 } 3892 offset -= mTouchWordOffset; 3893 mPrevOffset = offset; 3894 mInWord = !isEndBoundary(offset); 3895 positionCursor = true; 3896 } 3897 3898 // Handles can not cross and selection is at least one character. 3899 if (positionCursor) { 3900 final int selectionEnd = mTextView.getSelectionEnd(); 3901 if (offset >= selectionEnd) { 3902 // We can't cross the handles so let's just constrain the Y value. 3903 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 3904 if (alteredOffset >= selectionEnd) { 3905 // Can't pass the other drag handle. 3906 offset = Math.max(0, selectionEnd - 1); 3907 } else { 3908 offset = alteredOffset; 3909 } 3910 } 3911 positionAtCursorOffset(offset, false); 3912 } 3913 } 3914 3915 public ActionPopupWindow getActionPopupWindow() { 3916 return mActionPopupWindow; 3917 } 3918 3919 @Override 3920 public boolean onTouchEvent(MotionEvent event) { 3921 boolean superResult = super.onTouchEvent(event); 3922 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 3923 // Reset the touch word offset when the user has lifted their finger. 3924 mTouchWordOffset = 0; 3925 } 3926 return superResult; 3927 } 3928 } 3929 3930 private class SelectionEndHandleView extends HandleView { 3931 // The previous offset this handle was at. 3932 private int mPrevOffset; 3933 // Indicates whether the cursor is making adjustments within a word. 3934 private boolean mInWord = false; 3935 // Offset to track difference between touch and word boundary. 3936 protected int mTouchWordOffset; 3937 3938 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3939 super(drawableLtr, drawableRtl); 3940 } 3941 3942 @Override 3943 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3944 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 3945 } 3946 3947 @Override 3948 protected int getHorizontalGravity(boolean isRtlRun) { 3949 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 3950 } 3951 3952 @Override 3953 public int getCurrentCursorOffset() { 3954 return mTextView.getSelectionEnd(); 3955 } 3956 3957 @Override 3958 public void updateSelection(int offset) { 3959 Selection.setSelection((Spannable) mTextView.getText(), 3960 mTextView.getSelectionStart(), offset); 3961 updateDrawable(); 3962 } 3963 3964 @Override 3965 public void updatePosition(float x, float y) { 3966 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3967 final int currLine = mTextView.getLineAtCoordinate(y); 3968 3969 // Don't select white space on different lines. 3970 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 3971 3972 int offset = trueOffset; 3973 boolean positionCursor = false; 3974 3975 int end = getWordEnd(offset, true); 3976 int start = getWordStart(offset); 3977 3978 if (offset > mPrevOffset) { 3979 // User is increasing the selection. 3980 if (!mInWord || currLine > mPrevLine) { 3981 // We're not in a word, or we're on a different line so we'll expand by 3982 // word. First ensure the user has at least entered the next word. 3983 int midPoint = Math.min((end - start) / 2, 2); 3984 if (offset >= start + midPoint || currLine > mPrevLine) { 3985 offset = end; 3986 } else { 3987 offset = mPrevOffset; 3988 } 3989 } 3990 mPrevOffset = offset; 3991 mTouchWordOffset = Math.max(offset - trueOffset, 0); 3992 mInWord = !isEndBoundary(offset); 3993 positionCursor = true; 3994 } else if (offset + mTouchWordOffset < mPrevOffset) { 3995 // User is shrinking the selection. 3996 if (currLine > mPrevLine) { 3997 // We're on a different line, so we'll snap to word boundaries. 3998 offset = getWordStart(offset); 3999 } 4000 offset += mTouchWordOffset; 4001 mPrevOffset = offset; 4002 positionCursor = true; 4003 mInWord = !isStartBoundary(offset); 4004 } 4005 4006 if (positionCursor) { 4007 final int selectionStart = mTextView.getSelectionStart(); 4008 if (offset <= selectionStart) { 4009 // We can't cross the handles so let's just constrain the Y value. 4010 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 4011 int length = mTextView.getText().length(); 4012 if (alteredOffset <= selectionStart) { 4013 // Can't pass the other drag handle. 4014 offset = Math.min(selectionStart + 1, length); 4015 } else { 4016 offset = Math.min(alteredOffset, length); 4017 } 4018 } 4019 positionAtCursorOffset(offset, false); 4020 } 4021 } 4022 4023 public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) { 4024 mActionPopupWindow = actionPopupWindow; 4025 } 4026 4027 @Override 4028 public boolean onTouchEvent(MotionEvent event) { 4029 boolean superResult = super.onTouchEvent(event); 4030 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4031 // Reset the touch word offset when the user has lifted their finger. 4032 mTouchWordOffset = 0; 4033 } 4034 return superResult; 4035 } 4036 } 4037 4038 /** 4039 * Checks whether selection is happening on a different line than previous and 4040 * if that line only contains whitespace up to the touch location. 4041 * 4042 * @param prevLine The previous line the selection was on. 4043 * @param currLine The current line being selected. 4044 * @param offset The offset in the text where the touch occurred. 4045 * @return Whether or not it was just a white space line being selected. 4046 */ 4047 private boolean isWhitespaceLine(int prevLine, int currLine, int offset) { 4048 if (prevLine == currLine) { 4049 // Same line; don't care. 4050 return false; 4051 } 4052 CharSequence text = mTextView.getText(); 4053 if (offset == text.length()) { 4054 // No character at the last position. 4055 return false; 4056 } 4057 int lineEndOffset = mTextView.getLayout().getLineEnd(currLine); 4058 for (int cp, i = offset; i < lineEndOffset; i += Character.charCount(cp)) { 4059 cp = Character.codePointAt(text, i); 4060 if (!Character.isSpaceChar(cp) && !Character.isWhitespace(cp)) { 4061 // There are non white space chars on the line. 4062 return false; 4063 } 4064 } 4065 return true; 4066 } 4067 4068 /** 4069 * A CursorController instance can be used to control a cursor in the text. 4070 */ 4071 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4072 /** 4073 * Makes the cursor controller visible on screen. 4074 * See also {@link #hide()}. 4075 */ 4076 public void show(); 4077 4078 /** 4079 * Hide the cursor controller from screen. 4080 * See also {@link #show()}. 4081 */ 4082 public void hide(); 4083 4084 /** 4085 * Called when the view is detached from window. Perform house keeping task, such as 4086 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4087 * preventing the activity from being recycled. 4088 */ 4089 public void onDetached(); 4090 } 4091 4092 private class InsertionPointCursorController implements CursorController { 4093 private InsertionHandleView mHandle; 4094 4095 public void show() { 4096 getHandle().show(); 4097 } 4098 4099 public void showWithActionPopup() { 4100 getHandle().showWithActionPopup(); 4101 } 4102 4103 public void hide() { 4104 if (mHandle != null) { 4105 mHandle.hide(); 4106 } 4107 } 4108 4109 public void onTouchModeChanged(boolean isInTouchMode) { 4110 if (!isInTouchMode) { 4111 hide(); 4112 } 4113 } 4114 4115 private InsertionHandleView getHandle() { 4116 if (mSelectHandleCenter == null) { 4117 mSelectHandleCenter = mTextView.getContext().getDrawable( 4118 mTextView.mTextSelectHandleRes); 4119 } 4120 if (mHandle == null) { 4121 mHandle = new InsertionHandleView(mSelectHandleCenter); 4122 } 4123 return mHandle; 4124 } 4125 4126 @Override 4127 public void onDetached() { 4128 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4129 observer.removeOnTouchModeChangeListener(this); 4130 4131 if (mHandle != null) mHandle.onDetached(); 4132 } 4133 } 4134 4135 class SelectionModifierCursorController implements CursorController { 4136 private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds 4137 // The cursor controller handles, lazily created when shown. 4138 private SelectionStartHandleView mStartHandle; 4139 private SelectionEndHandleView mEndHandle; 4140 // The offsets of that last touch down event. Remembered to start selection there. 4141 private int mMinTouchOffset, mMaxTouchOffset; 4142 4143 // Double tap detection 4144 private long mPreviousTapUpTime = 0; 4145 private float mDownPositionX, mDownPositionY; 4146 private boolean mGestureStayedInTapRegion; 4147 4148 // Where the user first starts the drag motion. 4149 private int mStartOffset = -1; 4150 // Indicates whether the user is selecting text and using the drag accelerator. 4151 private boolean mDragAcceleratorActive; 4152 // Indicates the line of text the drag accelerator is on. 4153 private int mPrevLine = -1; 4154 4155 SelectionModifierCursorController() { 4156 resetTouchOffsets(); 4157 } 4158 4159 public void show() { 4160 if (mTextView.isInBatchEditMode()) { 4161 return; 4162 } 4163 initDrawables(); 4164 initHandles(); 4165 hideInsertionPointCursorController(); 4166 } 4167 4168 private void initDrawables() { 4169 if (mSelectHandleLeft == null) { 4170 mSelectHandleLeft = mTextView.getContext().getDrawable( 4171 mTextView.mTextSelectHandleLeftRes); 4172 } 4173 if (mSelectHandleRight == null) { 4174 mSelectHandleRight = mTextView.getContext().getDrawable( 4175 mTextView.mTextSelectHandleRightRes); 4176 } 4177 } 4178 4179 private void initHandles() { 4180 // Lazy object creation has to be done before updatePosition() is called. 4181 if (mStartHandle == null) { 4182 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4183 } 4184 if (mEndHandle == null) { 4185 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4186 } 4187 4188 mStartHandle.show(); 4189 mEndHandle.show(); 4190 4191 // Make sure both left and right handles share the same ActionPopupWindow (so that 4192 // moving any of the handles hides the action popup). 4193 mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION); 4194 mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow()); 4195 4196 hideInsertionPointCursorController(); 4197 } 4198 4199 public void hide() { 4200 if (mStartHandle != null) mStartHandle.hide(); 4201 if (mEndHandle != null) mEndHandle.hide(); 4202 } 4203 4204 public void enterDrag() { 4205 // Just need to init the handles / hide insertion cursor. 4206 show(); 4207 mDragAcceleratorActive = true; 4208 // Start location of selection. 4209 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4210 mLastDownPositionY); 4211 // Don't show the handles until user has lifted finger. 4212 hide(); 4213 4214 // This stops scrolling parents from intercepting the touch event, allowing 4215 // the user to continue dragging across the screen to select text; TextView will 4216 // scroll as necessary. 4217 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4218 } 4219 4220 public void onTouchEvent(MotionEvent event) { 4221 // This is done even when the View does not have focus, so that long presses can start 4222 // selection and tap can move cursor from this tap position. 4223 switch (event.getActionMasked()) { 4224 case MotionEvent.ACTION_DOWN: 4225 final float x = event.getX(); 4226 final float y = event.getY(); 4227 4228 // Remember finger down position, to be able to start selection from there. 4229 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4230 4231 // Double tap detection 4232 if (mGestureStayedInTapRegion) { 4233 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 4234 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 4235 final float deltaX = x - mDownPositionX; 4236 final float deltaY = y - mDownPositionY; 4237 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4238 4239 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4240 mTextView.getContext()); 4241 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4242 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4243 4244 if (stayedInArea && isPositionOnText(x, y)) { 4245 startSelectionActionMode(); 4246 mDiscardNextActionUp = true; 4247 } 4248 } 4249 } 4250 4251 // New selection, reset line. 4252 mPrevLine = mTextView.getLineAtCoordinate(y); 4253 mDownPositionX = x; 4254 mDownPositionY = y; 4255 mGestureStayedInTapRegion = true; 4256 break; 4257 4258 case MotionEvent.ACTION_POINTER_DOWN: 4259 case MotionEvent.ACTION_POINTER_UP: 4260 // Handle multi-point gestures. Keep min and max offset positions. 4261 // Only activated for devices that correctly handle multi-touch. 4262 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4263 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4264 updateMinAndMaxOffsets(event); 4265 } 4266 break; 4267 4268 case MotionEvent.ACTION_MOVE: 4269 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4270 mTextView.getContext()); 4271 4272 if (mGestureStayedInTapRegion) { 4273 final float deltaX = event.getX() - mDownPositionX; 4274 final float deltaY = event.getY() - mDownPositionY; 4275 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4276 4277 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4278 4279 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4280 mGestureStayedInTapRegion = false; 4281 } 4282 } 4283 4284 if (mStartHandle != null && mStartHandle.isShowing()) { 4285 // Don't do the drag if the handles are showing already. 4286 break; 4287 } 4288 4289 if (mStartOffset != -1) { 4290 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4291 event.getY()); 4292 int offset = rawOffset; 4293 4294 // We don't start "dragging" until the user is past the initial word that 4295 // gets selected on long press. 4296 int firstWordStart = getWordStart(mStartOffset); 4297 int firstWordEnd = getWordEnd(mStartOffset, false); 4298 if (offset > firstWordEnd || offset < firstWordStart) { 4299 4300 // Basically the goal in the below code is to have the highlight be 4301 // offset so that your finger isn't covering the end point. 4302 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4303 float mx = event.getX(); 4304 float my = event.getY(); 4305 if (mx > fingerOffset) mx -= fingerOffset; 4306 if (my > fingerOffset) my -= fingerOffset; 4307 offset = mTextView.getOffsetForPosition(mx, my); 4308 4309 int currLine = mTextView.getLineAtCoordinate(my); 4310 4311 // Don't select white space on different lines. 4312 if (isWhitespaceLine(mPrevLine, currLine, offset)) return; 4313 4314 mPrevLine = currLine; 4315 4316 // Perform the check for closeness at edge of view, if we're very close 4317 // don't adjust the offset to be in front of the finger - otherwise the 4318 // user can't select words at the edge. 4319 if (mTextView.getWidth() - fingerOffset > mx) { 4320 // We're going by word, so we need to make sure that the offset 4321 // that we get is within this, so we'll get the previous boundary. 4322 final WordIterator wordIterator = getWordIteratorWithText(); 4323 4324 final int precedingOffset = wordIterator.preceding(offset); 4325 if (mStartOffset < offset) { 4326 // Expanding with bottom handle, in this case the selection end 4327 // is before the finger. 4328 offset = Math.max(precedingOffset - 1, 0); 4329 } else { 4330 // Expand with the start handle, in this case the selection 4331 // start is before the finger. 4332 if (precedingOffset == WordIterator.DONE) { 4333 offset = 0; 4334 } else { 4335 offset = wordIterator.preceding(precedingOffset); 4336 } 4337 } 4338 } 4339 if (offset == WordIterator.DONE) 4340 offset = rawOffset; 4341 4342 // Need to adjust start offset based on direction of movement. 4343 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4344 : getWordEnd(mStartOffset, true); 4345 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4346 offset); 4347 } 4348 } 4349 break; 4350 4351 case MotionEvent.ACTION_UP: 4352 mPreviousTapUpTime = SystemClock.uptimeMillis(); 4353 if (mDragAcceleratorActive) { 4354 // No longer dragging to select text, let the parent intercept events. 4355 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4356 4357 show(); 4358 int startOffset = mTextView.getSelectionStart(); 4359 int endOffset = mTextView.getSelectionEnd(); 4360 4361 // Since we don't let drag handles pass once they're visible, we need to 4362 // make sure the start / end locations are correct because the user *can* 4363 // switch directions during the initial drag. 4364 if (endOffset < startOffset) { 4365 int tmp = endOffset; 4366 endOffset = startOffset; 4367 startOffset = tmp; 4368 4369 // Also update the selection with the right offsets in this case. 4370 Selection.setSelection((Spannable) mTextView.getText(), 4371 startOffset, endOffset); 4372 } 4373 4374 // Need to do this to display the handles. 4375 mStartHandle.showAtLocation(startOffset); 4376 mEndHandle.showAtLocation(endOffset); 4377 4378 // No longer the first dragging motion, reset. 4379 mDragAcceleratorActive = false; 4380 mStartOffset = -1; 4381 } 4382 break; 4383 } 4384 } 4385 4386 /** 4387 * @param event 4388 */ 4389 private void updateMinAndMaxOffsets(MotionEvent event) { 4390 int pointerCount = event.getPointerCount(); 4391 for (int index = 0; index < pointerCount; index++) { 4392 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4393 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4394 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4395 } 4396 } 4397 4398 public int getMinTouchOffset() { 4399 return mMinTouchOffset; 4400 } 4401 4402 public int getMaxTouchOffset() { 4403 return mMaxTouchOffset; 4404 } 4405 4406 public void resetTouchOffsets() { 4407 mMinTouchOffset = mMaxTouchOffset = -1; 4408 mStartOffset = -1; 4409 mDragAcceleratorActive = false; 4410 } 4411 4412 /** 4413 * @return true iff this controller is currently used to move the selection start. 4414 */ 4415 public boolean isSelectionStartDragged() { 4416 return mStartHandle != null && mStartHandle.isDragging(); 4417 } 4418 4419 /** 4420 * @return true if the user is selecting text using the drag accelerator. 4421 */ 4422 public boolean isDragAcceleratorActive() { 4423 return mDragAcceleratorActive; 4424 } 4425 4426 public void onTouchModeChanged(boolean isInTouchMode) { 4427 if (!isInTouchMode) { 4428 hide(); 4429 } 4430 } 4431 4432 @Override 4433 public void onDetached() { 4434 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4435 observer.removeOnTouchModeChangeListener(this); 4436 4437 if (mStartHandle != null) mStartHandle.onDetached(); 4438 if (mEndHandle != null) mEndHandle.onDetached(); 4439 } 4440 } 4441 4442 private class CorrectionHighlighter { 4443 private final Path mPath = new Path(); 4444 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4445 private int mStart, mEnd; 4446 private long mFadingStartTime; 4447 private RectF mTempRectF; 4448 private final static int FADE_OUT_DURATION = 400; 4449 4450 public CorrectionHighlighter() { 4451 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4452 applicationScale); 4453 mPaint.setStyle(Paint.Style.FILL); 4454 } 4455 4456 public void highlight(CorrectionInfo info) { 4457 mStart = info.getOffset(); 4458 mEnd = mStart + info.getNewText().length(); 4459 mFadingStartTime = SystemClock.uptimeMillis(); 4460 4461 if (mStart < 0 || mEnd < 0) { 4462 stopAnimation(); 4463 } 4464 } 4465 4466 public void draw(Canvas canvas, int cursorOffsetVertical) { 4467 if (updatePath() && updatePaint()) { 4468 if (cursorOffsetVertical != 0) { 4469 canvas.translate(0, cursorOffsetVertical); 4470 } 4471 4472 canvas.drawPath(mPath, mPaint); 4473 4474 if (cursorOffsetVertical != 0) { 4475 canvas.translate(0, -cursorOffsetVertical); 4476 } 4477 invalidate(true); // TODO invalidate cursor region only 4478 } else { 4479 stopAnimation(); 4480 invalidate(false); // TODO invalidate cursor region only 4481 } 4482 } 4483 4484 private boolean updatePaint() { 4485 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4486 if (duration > FADE_OUT_DURATION) return false; 4487 4488 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4489 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4490 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4491 ((int) (highlightColorAlpha * coef) << 24); 4492 mPaint.setColor(color); 4493 return true; 4494 } 4495 4496 private boolean updatePath() { 4497 final Layout layout = mTextView.getLayout(); 4498 if (layout == null) return false; 4499 4500 // Update in case text is edited while the animation is run 4501 final int length = mTextView.getText().length(); 4502 int start = Math.min(length, mStart); 4503 int end = Math.min(length, mEnd); 4504 4505 mPath.reset(); 4506 layout.getSelectionPath(start, end, mPath); 4507 return true; 4508 } 4509 4510 private void invalidate(boolean delayed) { 4511 if (mTextView.getLayout() == null) return; 4512 4513 if (mTempRectF == null) mTempRectF = new RectF(); 4514 mPath.computeBounds(mTempRectF, false); 4515 4516 int left = mTextView.getCompoundPaddingLeft(); 4517 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4518 4519 if (delayed) { 4520 mTextView.postInvalidateOnAnimation( 4521 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4522 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4523 } else { 4524 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4525 (int) mTempRectF.right, (int) mTempRectF.bottom); 4526 } 4527 } 4528 4529 private void stopAnimation() { 4530 Editor.this.mCorrectionHighlighter = null; 4531 } 4532 } 4533 4534 private static class ErrorPopup extends PopupWindow { 4535 private boolean mAbove = false; 4536 private final TextView mView; 4537 private int mPopupInlineErrorBackgroundId = 0; 4538 private int mPopupInlineErrorAboveBackgroundId = 0; 4539 4540 ErrorPopup(TextView v, int width, int height) { 4541 super(v, width, height); 4542 mView = v; 4543 // Make sure the TextView has a background set as it will be used the first time it is 4544 // shown and positioned. Initialized with below background, which should have 4545 // dimensions identical to the above version for this to work (and is more likely). 4546 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4547 com.android.internal.R.styleable.Theme_errorMessageBackground); 4548 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4549 } 4550 4551 void fixDirection(boolean above) { 4552 mAbove = above; 4553 4554 if (above) { 4555 mPopupInlineErrorAboveBackgroundId = 4556 getResourceId(mPopupInlineErrorAboveBackgroundId, 4557 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4558 } else { 4559 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4560 com.android.internal.R.styleable.Theme_errorMessageBackground); 4561 } 4562 4563 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4564 mPopupInlineErrorBackgroundId); 4565 } 4566 4567 private int getResourceId(int currentId, int index) { 4568 if (currentId == 0) { 4569 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4570 R.styleable.Theme); 4571 currentId = styledAttributes.getResourceId(index, 0); 4572 styledAttributes.recycle(); 4573 } 4574 return currentId; 4575 } 4576 4577 @Override 4578 public void update(int x, int y, int w, int h, boolean force) { 4579 super.update(x, y, w, h, force); 4580 4581 boolean above = isAboveAnchor(); 4582 if (above != mAbove) { 4583 fixDirection(above); 4584 } 4585 } 4586 } 4587 4588 static class InputContentType { 4589 int imeOptions = EditorInfo.IME_NULL; 4590 String privateImeOptions; 4591 CharSequence imeActionLabel; 4592 int imeActionId; 4593 Bundle extras; 4594 OnEditorActionListener onEditorActionListener; 4595 boolean enterDown; 4596 } 4597 4598 static class InputMethodState { 4599 Rect mCursorRectInWindow = new Rect(); 4600 float[] mTmpOffset = new float[2]; 4601 ExtractedTextRequest mExtractedTextRequest; 4602 final ExtractedText mExtractedText = new ExtractedText(); 4603 int mBatchEditNesting; 4604 boolean mCursorChanged; 4605 boolean mSelectionModeChanged; 4606 boolean mContentChanged; 4607 int mChangedStart, mChangedEnd, mChangedDelta; 4608 } 4609 4610 /** 4611 * @return True iff (start, end) is a valid range within the text. 4612 */ 4613 private static boolean isValidRange(CharSequence text, int start, int end) { 4614 return 0 <= start && start <= end && end <= text.length(); 4615 } 4616 4617 /** 4618 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4619 * text being typed (and hence always returns null from the filter() method). 4620 */ 4621 public static class UndoInputFilter implements InputFilter { 4622 private final Editor mEditor; 4623 4624 // Whether the current filter pass is directly caused by an end-user text edit. 4625 private boolean mIsUserEdit; 4626 4627 // Whether this is the first pass through the filter for a given end-user text edit. 4628 private boolean mFirstFilterPass; 4629 4630 public UndoInputFilter(Editor editor) { 4631 mEditor = editor; 4632 } 4633 4634 /** 4635 * Signals that a user-triggered edit is starting. 4636 */ 4637 public void beginBatchEdit() { 4638 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4639 mIsUserEdit = true; 4640 mFirstFilterPass = true; 4641 } 4642 4643 public void endBatchEdit() { 4644 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4645 mIsUserEdit = false; 4646 } 4647 4648 @Override 4649 public CharSequence filter(CharSequence source, int start, int end, 4650 Spanned dest, int dstart, int dend) { 4651 if (DEBUG_UNDO) { 4652 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4653 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4654 } 4655 4656 // Check to see if this edit should be tracked for undo. 4657 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4658 return null; 4659 } 4660 4661 // An application may install a TextWatcher to provide additional modifications after 4662 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4663 // string). This results in multiple filter() calls for what the user considers to be 4664 // a single operation. Always undo the whole set of changes in one step. 4665 final boolean forceMerge = !mFirstFilterPass; 4666 mFirstFilterPass = false; 4667 4668 // Build a new operation with all the information from this edit. 4669 EditOperation edit = new EditOperation(mEditor, forceMerge, 4670 source, start, end, dest, dstart, dend); 4671 4672 // Fetch the last edit operation and attempt to merge in the new edit. 4673 final UndoManager um = mEditor.mUndoManager; 4674 um.beginUpdate("Edit text"); 4675 EditOperation lastEdit = um.getLastOperation( 4676 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4677 if (lastEdit == null) { 4678 // Add this as the first edit. 4679 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4680 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4681 } else if (!mIsUserEdit) { 4682 // An application directly modified the Editable outside of a text edit. Treat this 4683 // as a new change and don't attempt to merge. 4684 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4685 um.commitState(mEditor.mUndoOwner); 4686 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4687 } else if (lastEdit.mergeWith(edit)) { 4688 // Merge succeeded, nothing else to do. 4689 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4690 } else { 4691 // Could not merge with the last edit, so commit the last edit and add this edit. 4692 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4693 um.commitState(mEditor.mUndoOwner); 4694 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4695 } 4696 um.endUpdate(); 4697 return null; // Text not changed. 4698 } 4699 4700 private boolean canUndoEdit(CharSequence source, int start, int end, 4701 Spanned dest, int dstart, int dend) { 4702 if (!mEditor.mAllowUndo) { 4703 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4704 return false; 4705 } 4706 4707 if (mEditor.mUndoManager.isInUndo()) { 4708 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4709 return false; 4710 } 4711 4712 // Text filters run before input operations are applied. However, some input operations 4713 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4714 // attempt to undo invalid operations. 4715 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4716 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4717 return false; 4718 } 4719 4720 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4721 // on an input field. Skip no-op changes. 4722 if (start == end && dstart == dend) { 4723 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4724 return false; 4725 } 4726 4727 return true; 4728 } 4729 } 4730 4731 /** 4732 * An operation to undo a single "edit" to a text view. 4733 */ 4734 public static class EditOperation extends UndoOperation<Editor> { 4735 private static final int TYPE_INSERT = 0; 4736 private static final int TYPE_DELETE = 1; 4737 private static final int TYPE_REPLACE = 2; 4738 4739 private int mType; 4740 private boolean mForceMerge; 4741 private String mOldText; 4742 private int mOldTextStart; 4743 private String mNewText; 4744 private int mNewTextStart; 4745 4746 private int mOldCursorPos; 4747 private int mNewCursorPos; 4748 4749 /** 4750 * Constructs an edit operation from a text input operation that replaces the range 4751 * (dstart, dend) of dest with (start, end) of source. See {@link InputFilter#filter}. 4752 * If forceMerge is true then always forcibly merge this operation with any previous one. 4753 */ 4754 public EditOperation(Editor editor, boolean forceMerge, 4755 CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { 4756 super(editor.mUndoOwner); 4757 mForceMerge = forceMerge; 4758 4759 mOldText = dest.subSequence(dstart, dend).toString(); 4760 mNewText = source.subSequence(start, end).toString(); 4761 4762 // Determine the type of the edit and store where it occurred. Avoid storing 4763 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4764 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4765 // outside the bounds of the final text). 4766 if (mNewText.length() > 0 && mOldText.length() == 0) { 4767 mType = TYPE_INSERT; 4768 mNewTextStart = dstart; 4769 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4770 mType = TYPE_DELETE; 4771 mOldTextStart = dstart; 4772 } else { 4773 mType = TYPE_REPLACE; 4774 mOldTextStart = mNewTextStart = dstart; 4775 } 4776 4777 // Store cursor data. 4778 mOldCursorPos = editor.mTextView.getSelectionStart(); 4779 mNewCursorPos = dstart + (end - start); 4780 } 4781 4782 public EditOperation(Parcel src, ClassLoader loader) { 4783 super(src, loader); 4784 mType = src.readInt(); 4785 mForceMerge = src.readInt() != 0; 4786 mOldText = src.readString(); 4787 mOldTextStart = src.readInt(); 4788 mNewText = src.readString(); 4789 mNewTextStart = src.readInt(); 4790 mOldCursorPos = src.readInt(); 4791 mNewCursorPos = src.readInt(); 4792 } 4793 4794 @Override 4795 public void writeToParcel(Parcel dest, int flags) { 4796 dest.writeInt(mType); 4797 dest.writeInt(mForceMerge ? 1 : 0); 4798 dest.writeString(mOldText); 4799 dest.writeInt(mOldTextStart); 4800 dest.writeString(mNewText); 4801 dest.writeInt(mNewTextStart); 4802 dest.writeInt(mOldCursorPos); 4803 dest.writeInt(mNewCursorPos); 4804 } 4805 4806 private int getNewTextEnd() { 4807 return mNewTextStart + mNewText.length(); 4808 } 4809 4810 private int getOldTextEnd() { 4811 return mOldTextStart + mOldText.length(); 4812 } 4813 4814 @Override 4815 public void commit() { 4816 } 4817 4818 @Override 4819 public void undo() { 4820 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4821 // Remove the new text and insert the old. 4822 Editor editor = getOwnerData(); 4823 Editable text = (Editable) editor.mTextView.getText(); 4824 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4825 mOldCursorPos); 4826 } 4827 4828 @Override 4829 public void redo() { 4830 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4831 // Remove the old text and insert the new. 4832 Editor editor = getOwnerData(); 4833 Editable text = (Editable) editor.mTextView.getText(); 4834 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4835 mNewCursorPos); 4836 } 4837 4838 /** 4839 * Attempts to merge this existing operation with a new edit. 4840 * @param edit The new edit operation. 4841 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4842 * object unchanged. 4843 */ 4844 private boolean mergeWith(EditOperation edit) { 4845 if (DEBUG_UNDO) { 4846 Log.d(TAG, "mergeWith old " + this); 4847 Log.d(TAG, "mergeWith new " + edit); 4848 } 4849 if (edit.mForceMerge) { 4850 forceMergeWith(edit); 4851 return true; 4852 } 4853 switch (mType) { 4854 case TYPE_INSERT: 4855 return mergeInsertWith(edit); 4856 case TYPE_DELETE: 4857 return mergeDeleteWith(edit); 4858 case TYPE_REPLACE: 4859 return mergeReplaceWith(edit); 4860 default: 4861 return false; 4862 } 4863 } 4864 4865 private boolean mergeInsertWith(EditOperation edit) { 4866 // Only merge continuous insertions. 4867 if (edit.mType != TYPE_INSERT) { 4868 return false; 4869 } 4870 // Only merge insertions that are contiguous. 4871 if (getNewTextEnd() != edit.mNewTextStart) { 4872 return false; 4873 } 4874 mNewText += edit.mNewText; 4875 mNewCursorPos = edit.mNewCursorPos; 4876 return true; 4877 } 4878 4879 // TODO: Support forward delete. 4880 private boolean mergeDeleteWith(EditOperation edit) { 4881 // Only merge continuous deletes. 4882 if (edit.mType != TYPE_DELETE) { 4883 return false; 4884 } 4885 // Only merge deletions that are contiguous. 4886 if (mOldTextStart != edit.getOldTextEnd()) { 4887 return false; 4888 } 4889 mOldTextStart = edit.mOldTextStart; 4890 mOldText = edit.mOldText + mOldText; 4891 mNewCursorPos = edit.mNewCursorPos; 4892 return true; 4893 } 4894 4895 private boolean mergeReplaceWith(EditOperation edit) { 4896 // Replacements can merge only with adjacent inserts. 4897 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 4898 return false; 4899 } 4900 mOldText += edit.mOldText; 4901 mNewText += edit.mNewText; 4902 mNewCursorPos = edit.mNewCursorPos; 4903 return true; 4904 } 4905 4906 /** 4907 * Forcibly creates a single merged edit operation by simulating the entire text 4908 * contents being replaced. 4909 */ 4910 private void forceMergeWith(EditOperation edit) { 4911 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 4912 Editor editor = getOwnerData(); 4913 4914 // Copy the text of the current field. 4915 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 4916 // but would require two parallel implementations of modifyText() because Editable and 4917 // StringBuilder do not share an interface for replace/delete/insert. 4918 Editable editable = (Editable) editor.mTextView.getText(); 4919 Editable originalText = new SpannableStringBuilder(editable.toString()); 4920 4921 // Roll back the last operation. 4922 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4923 mOldCursorPos); 4924 4925 // Clone the text again and apply the new operation. 4926 Editable finalText = new SpannableStringBuilder(editable.toString()); 4927 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 4928 edit.mNewTextStart, edit.mNewCursorPos); 4929 4930 // Convert this operation into a non-mergeable replacement of the entire string. 4931 mType = TYPE_REPLACE; 4932 mNewText = finalText.toString(); 4933 mNewTextStart = 0; 4934 mOldText = originalText.toString(); 4935 mOldTextStart = 0; 4936 mNewCursorPos = edit.mNewCursorPos; 4937 // mOldCursorPos is unchanged. 4938 } 4939 4940 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 4941 CharSequence newText, int newTextInsertAt, int newCursorPos) { 4942 // Apply the edit if it is still valid. 4943 if (isValidRange(text, deleteFrom, deleteTo) && 4944 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 4945 if (deleteFrom != deleteTo) { 4946 text.delete(deleteFrom, deleteTo); 4947 } 4948 if (newText.length() != 0) { 4949 text.insert(newTextInsertAt, newText); 4950 } 4951 } 4952 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 4953 // don't explicitly set it and rely on SpannableStringBuilder to position it. 4954 // TODO: Select all the text that was undone. 4955 if (0 <= newCursorPos && newCursorPos <= text.length()) { 4956 Selection.setSelection(text, newCursorPos); 4957 } 4958 } 4959 4960 private String getTypeString() { 4961 switch (mType) { 4962 case TYPE_INSERT: 4963 return "insert"; 4964 case TYPE_DELETE: 4965 return "delete"; 4966 case TYPE_REPLACE: 4967 return "replace"; 4968 default: 4969 return ""; 4970 } 4971 } 4972 4973 @Override 4974 public String toString() { 4975 return "[mType=" + getTypeString() + ", " + 4976 "mOldText=" + mOldText + ", " + 4977 "mOldTextStart=" + mOldTextStart + ", " + 4978 "mNewText=" + mNewText + ", " + 4979 "mNewTextStart=" + mNewTextStart + ", " + 4980 "mOldCursorPos=" + mOldCursorPos + ", " + 4981 "mNewCursorPos=" + mNewCursorPos + "]"; 4982 } 4983 4984 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 4985 = new Parcelable.ClassLoaderCreator<EditOperation>() { 4986 @Override 4987 public EditOperation createFromParcel(Parcel in) { 4988 return new EditOperation(in, null); 4989 } 4990 4991 @Override 4992 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 4993 return new EditOperation(in, loader); 4994 } 4995 4996 @Override 4997 public EditOperation[] newArray(int size) { 4998 return new EditOperation[size]; 4999 } 5000 }; 5001 } 5002} 5003