Editor.java revision 4c42bc045daccb293198559334df6fc6232fff6a
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.app.PendingIntent; 21import android.app.PendingIntent.CanceledException; 22import android.content.ClipData; 23import android.content.ClipData.Item; 24import android.content.Context; 25import android.content.Intent; 26import android.content.UndoManager; 27import android.content.UndoOperation; 28import android.content.UndoOwner; 29import android.content.pm.PackageManager; 30import android.content.res.TypedArray; 31import android.graphics.Canvas; 32import android.graphics.Color; 33import android.graphics.Matrix; 34import android.graphics.Paint; 35import android.graphics.Path; 36import android.graphics.Rect; 37import android.graphics.RectF; 38import android.graphics.drawable.Drawable; 39import android.inputmethodservice.ExtractEditText; 40import android.os.Build; 41import android.os.Bundle; 42import android.os.Handler; 43import android.os.Parcel; 44import android.os.Parcelable; 45import android.os.ParcelableParcel; 46import android.os.SystemClock; 47import android.provider.Settings; 48import android.text.DynamicLayout; 49import android.text.Editable; 50import android.text.InputFilter; 51import android.text.InputType; 52import android.text.Layout; 53import android.text.ParcelableSpan; 54import android.text.Selection; 55import android.text.SpanWatcher; 56import android.text.Spannable; 57import android.text.SpannableStringBuilder; 58import android.text.Spanned; 59import android.text.StaticLayout; 60import android.text.TextUtils; 61import android.text.method.KeyListener; 62import android.text.method.MetaKeyKeyListener; 63import android.text.method.MovementMethod; 64import android.text.method.PasswordTransformationMethod; 65import android.text.method.WordIterator; 66import android.text.style.EasyEditSpan; 67import android.text.style.SuggestionRangeSpan; 68import android.text.style.SuggestionSpan; 69import android.text.style.TextAppearanceSpan; 70import android.text.style.URLSpan; 71import android.util.DisplayMetrics; 72import android.util.Log; 73import android.view.ActionMode; 74import android.view.ActionMode.Callback; 75import android.view.DisplayListCanvas; 76import android.view.DragEvent; 77import android.view.Gravity; 78import android.view.LayoutInflater; 79import android.view.Menu; 80import android.view.MenuItem; 81import android.view.MotionEvent; 82import android.view.RenderNode; 83import android.view.View; 84import android.view.View.DragShadowBuilder; 85import android.view.View.OnClickListener; 86import android.view.ViewConfiguration; 87import android.view.ViewGroup; 88import android.view.ViewGroup.LayoutParams; 89import android.view.ViewParent; 90import android.view.ViewTreeObserver; 91import android.view.WindowManager; 92import android.view.inputmethod.CorrectionInfo; 93import android.view.inputmethod.CursorAnchorInfo; 94import android.view.inputmethod.EditorInfo; 95import android.view.inputmethod.ExtractedText; 96import android.view.inputmethod.ExtractedTextRequest; 97import android.view.inputmethod.InputConnection; 98import android.view.inputmethod.InputMethodManager; 99import android.widget.AdapterView.OnItemClickListener; 100import android.widget.TextView.Drawables; 101import android.widget.TextView.OnEditorActionListener; 102 103import com.android.internal.util.ArrayUtils; 104import com.android.internal.util.GrowingArrayUtils; 105import com.android.internal.view.menu.MenuBuilder; 106import com.android.internal.widget.EditableInputConnection; 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 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 240 Parcel parcel = state.getParcel(); 241 mUndoManager.saveInstanceState(parcel); 242 mUndoInputFilter.saveInstanceState(parcel); 243 return state; 244 } 245 246 void restoreInstanceState(ParcelableParcel state) { 247 Parcel parcel = state.getParcel(); 248 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 249 mUndoInputFilter.restoreInstanceState(parcel); 250 // Re-associate this object as the owner of undo state. 251 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 252 } 253 254 /** 255 * Forgets all undo and redo operations for this Editor. 256 */ 257 void forgetUndoRedo() { 258 UndoOwner[] owners = { mUndoOwner }; 259 mUndoManager.forgetUndos(owners, -1 /* all */); 260 mUndoManager.forgetRedos(owners, -1 /* all */); 261 } 262 263 boolean canUndo() { 264 UndoOwner[] owners = { mUndoOwner }; 265 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 266 } 267 268 boolean canRedo() { 269 UndoOwner[] owners = { mUndoOwner }; 270 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 271 } 272 273 void undo() { 274 if (!mAllowUndo) { 275 return; 276 } 277 UndoOwner[] owners = { mUndoOwner }; 278 mUndoManager.undo(owners, 1); // Undo 1 action. 279 } 280 281 void redo() { 282 if (!mAllowUndo) { 283 return; 284 } 285 UndoOwner[] owners = { mUndoOwner }; 286 mUndoManager.redo(owners, 1); // Redo 1 action. 287 } 288 289 void onAttachedToWindow() { 290 if (mShowErrorAfterAttach) { 291 showError(); 292 mShowErrorAfterAttach = false; 293 } 294 mTemporaryDetach = false; 295 296 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 297 // No need to create the controller. 298 // The get method will add the listener on controller creation. 299 if (mInsertionPointCursorController != null) { 300 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 301 } 302 if (mSelectionModifierCursorController != null) { 303 mSelectionModifierCursorController.resetTouchOffsets(); 304 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 305 } 306 updateSpellCheckSpans(0, mTextView.getText().length(), 307 true /* create the spell checker if needed */); 308 309 if (mTextView.hasTransientState() && 310 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 311 // Since transient state is reference counted make sure it stays matched 312 // with our own calls to it for managing selection. 313 // The action mode callback will set this back again when/if the action mode starts. 314 mTextView.setHasTransientState(false); 315 316 // We had an active selection from before, start the selection mode. 317 startSelectionActionModeWithSelection(); 318 } 319 320 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 321 } 322 323 void onDetachedFromWindow() { 324 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 325 326 if (mError != null) { 327 hideError(); 328 } 329 330 if (mBlink != null) { 331 mBlink.removeCallbacks(mBlink); 332 } 333 334 if (mInsertionPointCursorController != null) { 335 mInsertionPointCursorController.onDetached(); 336 } 337 338 if (mSelectionModifierCursorController != null) { 339 mSelectionModifierCursorController.onDetached(); 340 } 341 342 if (mShowSuggestionRunnable != null) { 343 mTextView.removeCallbacks(mShowSuggestionRunnable); 344 } 345 346 destroyDisplayListsData(); 347 348 if (mSpellChecker != null) { 349 mSpellChecker.closeSession(); 350 // Forces the creation of a new SpellChecker next time this window is created. 351 // Will handle the cases where the settings has been changed in the meantime. 352 mSpellChecker = null; 353 } 354 355 mPreserveDetachedSelection = true; 356 hideControllers(); 357 mPreserveDetachedSelection = false; 358 mTemporaryDetach = false; 359 } 360 361 private void destroyDisplayListsData() { 362 if (mTextDisplayLists != null) { 363 for (int i = 0; i < mTextDisplayLists.length; i++) { 364 RenderNode displayList = mTextDisplayLists[i] != null 365 ? mTextDisplayLists[i].displayList : null; 366 if (displayList != null && displayList.isValid()) { 367 displayList.destroyDisplayListData(); 368 } 369 } 370 } 371 } 372 373 private void showError() { 374 if (mTextView.getWindowToken() == null) { 375 mShowErrorAfterAttach = true; 376 return; 377 } 378 379 if (mErrorPopup == null) { 380 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 381 final TextView err = (TextView) inflater.inflate( 382 com.android.internal.R.layout.textview_hint, null); 383 384 final float scale = mTextView.getResources().getDisplayMetrics().density; 385 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 386 mErrorPopup.setFocusable(false); 387 // The user is entering text, so the input method is needed. We 388 // don't want the popup to be displayed on top of it. 389 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 390 } 391 392 TextView tv = (TextView) mErrorPopup.getContentView(); 393 chooseSize(mErrorPopup, mError, tv); 394 tv.setText(mError); 395 396 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 397 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 398 } 399 400 public void setError(CharSequence error, Drawable icon) { 401 mError = TextUtils.stringOrSpannedString(error); 402 mErrorWasChanged = true; 403 404 if (mError == null) { 405 setErrorIcon(null); 406 if (mErrorPopup != null) { 407 if (mErrorPopup.isShowing()) { 408 mErrorPopup.dismiss(); 409 } 410 411 mErrorPopup = null; 412 } 413 mShowErrorAfterAttach = false; 414 } else { 415 setErrorIcon(icon); 416 if (mTextView.isFocused()) { 417 showError(); 418 } 419 } 420 } 421 422 private void setErrorIcon(Drawable icon) { 423 Drawables dr = mTextView.mDrawables; 424 if (dr == null) { 425 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 426 } 427 dr.setErrorDrawable(icon, mTextView); 428 429 mTextView.resetResolvedDrawables(); 430 mTextView.invalidate(); 431 mTextView.requestLayout(); 432 } 433 434 private void hideError() { 435 if (mErrorPopup != null) { 436 if (mErrorPopup.isShowing()) { 437 mErrorPopup.dismiss(); 438 } 439 } 440 441 mShowErrorAfterAttach = false; 442 } 443 444 /** 445 * Returns the X offset to make the pointy top of the error point 446 * at the middle of the error icon. 447 */ 448 private int getErrorX() { 449 /* 450 * The "25" is the distance between the point and the right edge 451 * of the background 452 */ 453 final float scale = mTextView.getResources().getDisplayMetrics().density; 454 455 final Drawables dr = mTextView.mDrawables; 456 457 final int layoutDirection = mTextView.getLayoutDirection(); 458 int errorX; 459 int offset; 460 switch (layoutDirection) { 461 default: 462 case View.LAYOUT_DIRECTION_LTR: 463 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 464 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 465 mTextView.getPaddingRight() + offset; 466 break; 467 case View.LAYOUT_DIRECTION_RTL: 468 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 469 errorX = mTextView.getPaddingLeft() + offset; 470 break; 471 } 472 return errorX; 473 } 474 475 /** 476 * Returns the Y offset to make the pointy top of the error point 477 * at the bottom of the error icon. 478 */ 479 private int getErrorY() { 480 /* 481 * Compound, not extended, because the icon is not clipped 482 * if the text height is smaller. 483 */ 484 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 485 int vspace = mTextView.getBottom() - mTextView.getTop() - 486 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 487 488 final Drawables dr = mTextView.mDrawables; 489 490 final int layoutDirection = mTextView.getLayoutDirection(); 491 int height; 492 switch (layoutDirection) { 493 default: 494 case View.LAYOUT_DIRECTION_LTR: 495 height = (dr != null ? dr.mDrawableHeightRight : 0); 496 break; 497 case View.LAYOUT_DIRECTION_RTL: 498 height = (dr != null ? dr.mDrawableHeightLeft : 0); 499 break; 500 } 501 502 int icontop = compoundPaddingTop + (vspace - height) / 2; 503 504 /* 505 * The "2" is the distance between the point and the top edge 506 * of the background. 507 */ 508 final float scale = mTextView.getResources().getDisplayMetrics().density; 509 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 510 } 511 512 void createInputContentTypeIfNeeded() { 513 if (mInputContentType == null) { 514 mInputContentType = new InputContentType(); 515 } 516 } 517 518 void createInputMethodStateIfNeeded() { 519 if (mInputMethodState == null) { 520 mInputMethodState = new InputMethodState(); 521 } 522 } 523 524 boolean isCursorVisible() { 525 // The default value is true, even when there is no associated Editor 526 return mCursorVisible && mTextView.isTextEditable(); 527 } 528 529 void prepareCursorControllers() { 530 boolean windowSupportsHandles = false; 531 532 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 533 if (params instanceof WindowManager.LayoutParams) { 534 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 535 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 536 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 537 } 538 539 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 540 mInsertionControllerEnabled = enabled && isCursorVisible(); 541 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 542 543 if (!mInsertionControllerEnabled) { 544 hideInsertionPointCursorController(); 545 if (mInsertionPointCursorController != null) { 546 mInsertionPointCursorController.onDetached(); 547 mInsertionPointCursorController = null; 548 } 549 } 550 551 if (!mSelectionControllerEnabled) { 552 stopSelectionActionMode(); 553 if (mSelectionModifierCursorController != null) { 554 mSelectionModifierCursorController.onDetached(); 555 mSelectionModifierCursorController = null; 556 } 557 } 558 } 559 560 void hideInsertionPointCursorController() { 561 if (mInsertionPointCursorController != null) { 562 mInsertionPointCursorController.hide(); 563 } 564 } 565 566 /** 567 * Hides the insertion controller and stops text selection mode, hiding the selection controller 568 */ 569 void hideControllers() { 570 hideCursorControllers(); 571 hideSpanControllers(); 572 } 573 574 private void hideSpanControllers() { 575 if (mSpanController != null) { 576 mSpanController.hide(); 577 } 578 } 579 580 private void hideCursorControllers() { 581 if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) { 582 // Should be done before hide insertion point controller since it triggers a show of it 583 mSuggestionsPopupWindow.hide(); 584 } 585 hideInsertionPointCursorController(); 586 stopSelectionActionMode(); 587 } 588 589 /** 590 * Create new SpellCheckSpans on the modified region. 591 */ 592 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 593 // Remove spans whose adjacent characters are text not punctuation 594 mTextView.removeAdjacentSuggestionSpans(start); 595 mTextView.removeAdjacentSuggestionSpans(end); 596 597 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 598 !(mTextView instanceof ExtractEditText)) { 599 if (mSpellChecker == null && createSpellChecker) { 600 mSpellChecker = new SpellChecker(mTextView); 601 } 602 if (mSpellChecker != null) { 603 mSpellChecker.spellCheck(start, end); 604 } 605 } 606 } 607 608 void onScreenStateChanged(int screenState) { 609 switch (screenState) { 610 case View.SCREEN_STATE_ON: 611 resumeBlink(); 612 break; 613 case View.SCREEN_STATE_OFF: 614 suspendBlink(); 615 break; 616 } 617 } 618 619 private void suspendBlink() { 620 if (mBlink != null) { 621 mBlink.cancel(); 622 } 623 } 624 625 private void resumeBlink() { 626 if (mBlink != null) { 627 mBlink.uncancel(); 628 makeBlink(); 629 } 630 } 631 632 void adjustInputType(boolean password, boolean passwordInputType, 633 boolean webPasswordInputType, boolean numberPasswordInputType) { 634 // mInputType has been set from inputType, possibly modified by mInputMethod. 635 // Specialize mInputType to [web]password if we have a text class and the original input 636 // type was a password. 637 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 638 if (password || passwordInputType) { 639 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 640 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 641 } 642 if (webPasswordInputType) { 643 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 644 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 645 } 646 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 647 if (numberPasswordInputType) { 648 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 649 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 650 } 651 } 652 } 653 654 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 655 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 656 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 657 658 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 659 com.android.internal.R.dimen.textview_error_popup_default_width); 660 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 661 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 662 float max = 0; 663 for (int i = 0; i < l.getLineCount(); i++) { 664 max = Math.max(max, l.getLineWidth(i)); 665 } 666 667 /* 668 * Now set the popup size to be big enough for the text plus the border capped 669 * to DEFAULT_MAX_POPUP_WIDTH 670 */ 671 pop.setWidth(wid + (int) Math.ceil(max)); 672 pop.setHeight(ht + l.getHeight()); 673 } 674 675 void setFrame() { 676 if (mErrorPopup != null) { 677 TextView tv = (TextView) mErrorPopup.getContentView(); 678 chooseSize(mErrorPopup, mError, tv); 679 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 680 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 681 } 682 } 683 684 /** 685 * Unlike {@link TextView#textCanBeSelected()}, this method is based on the <i>current</i> state 686 * of the TextView. textCanBeSelected() has to be true (this is one of the conditions to have 687 * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient. 688 */ 689 private boolean canSelectText() { 690 return hasSelectionController() && mTextView.getText().length() != 0; 691 } 692 693 /** 694 * It would be better to rely on the input type for everything. A password inputType should have 695 * a password transformation. We should hence use isPasswordInputType instead of this method. 696 * 697 * We should: 698 * - Call setInputType in setKeyListener instead of changing the input type directly (which 699 * would install the correct transformation). 700 * - Refuse the installation of a non-password transformation in setTransformation if the input 701 * type is password. 702 * 703 * However, this is like this for legacy reasons and we cannot break existing apps. This method 704 * is useful since it matches what the user can see (obfuscated text or not). 705 * 706 * @return true if the current transformation method is of the password type. 707 */ 708 private boolean hasPasswordTransformationMethod() { 709 return mTextView.getTransformationMethod() instanceof PasswordTransformationMethod; 710 } 711 712 private int getWordStart(int offset) { 713 // FIXME - For this and similar methods we're not doing anything to check if there's 714 // a LocaleSpan in the text, this may be something we should try handling or checking for. 715 int retOffset = getWordIteratorWithText().getBeginning(offset); 716 if (retOffset == BreakIterator.DONE) retOffset = offset; 717 return retOffset; 718 } 719 720 private int getWordEnd(int offset, boolean includePunctuation) { 721 int retOffset = getWordIteratorWithText().getEnd(offset); 722 if (retOffset == BreakIterator.DONE) { 723 retOffset = offset; 724 } else if (includePunctuation) { 725 retOffset = handlePunctuation(retOffset); 726 } 727 return retOffset; 728 } 729 730 private boolean isEndBoundary(int offset) { 731 int thisEnd = getWordEnd(offset, false); 732 return offset == thisEnd; 733 } 734 735 private boolean isStartBoundary(int offset) { 736 int thisStart = getWordStart(offset); 737 return thisStart == offset; 738 } 739 740 private int handlePunctuation(int offset) { 741 // FIXME - Check with UX how repeated ending punctuation should be handled. 742 // FIXME - Check with UX if / how we would handle non sentence ending characters. 743 // FIXME - Consider punctuation in different languages. 744 CharSequence text = mTextView.getText(); 745 if (offset < text.length()) { 746 int c = Character.codePointAt(text, offset); 747 if (c == 0x002e /* period */|| c == 0x003f /* question mark */ 748 || c == 0x0021 /* exclamation mark */) { 749 offset = Character.offsetByCodePoints(text, offset, 1); 750 } 751 } 752 return offset; 753 } 754 755 /** 756 * Adjusts selection to the word under last touch offset. Return true if the operation was 757 * successfully performed. 758 */ 759 private boolean selectCurrentWord() { 760 if (!canSelectText()) { 761 return false; 762 } 763 764 if (hasPasswordTransformationMethod()) { 765 // Always select all on a password field. 766 // Cut/copy menu entries are not available for passwords, but being able to select all 767 // is however useful to delete or paste to replace the entire content. 768 return mTextView.selectAllText(); 769 } 770 771 int inputType = mTextView.getInputType(); 772 int klass = inputType & InputType.TYPE_MASK_CLASS; 773 int variation = inputType & InputType.TYPE_MASK_VARIATION; 774 775 // Specific text field types: select the entire text for these 776 if (klass == InputType.TYPE_CLASS_NUMBER || 777 klass == InputType.TYPE_CLASS_PHONE || 778 klass == InputType.TYPE_CLASS_DATETIME || 779 variation == InputType.TYPE_TEXT_VARIATION_URI || 780 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 781 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 782 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 783 return mTextView.selectAllText(); 784 } 785 786 long lastTouchOffsets = getLastTouchOffsets(); 787 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 788 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 789 790 // Safety check in case standard touch event handling has been bypassed 791 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 792 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 793 794 int selectionStart, selectionEnd; 795 796 // If a URLSpan (web address, email, phone...) is found at that position, select it. 797 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 798 getSpans(minOffset, maxOffset, URLSpan.class); 799 if (urlSpans.length >= 1) { 800 URLSpan urlSpan = urlSpans[0]; 801 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 802 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 803 } else { 804 // FIXME - We should check if there's a LocaleSpan in the text, this may be 805 // something we should try handling or checking for. 806 final WordIterator wordIterator = getWordIterator(); 807 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 808 809 selectionStart = wordIterator.getBeginning(minOffset); 810 selectionEnd = wordIterator.getEnd(maxOffset); 811 812 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 813 selectionStart == selectionEnd) { 814 // Possible when the word iterator does not properly handle the text's language 815 long range = getCharRange(minOffset); 816 selectionStart = TextUtils.unpackRangeStartFromLong(range); 817 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 818 } 819 } 820 821 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 822 return selectionEnd > selectionStart; 823 } 824 825 void onLocaleChanged() { 826 // Will be re-created on demand in getWordIterator with the proper new locale 827 mWordIterator = null; 828 mWordIteratorWithText = null; 829 } 830 831 /** 832 * @hide 833 */ 834 public WordIterator getWordIterator() { 835 if (mWordIterator == null) { 836 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 837 } 838 return mWordIterator; 839 } 840 841 private WordIterator getWordIteratorWithText() { 842 if (mWordIteratorWithText == null) { 843 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 844 mUpdateWordIteratorText = true; 845 } 846 if (mUpdateWordIteratorText) { 847 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 848 // to the user's selection is needed. A possible solution would be to 849 // copy some number N of characters near the selection and then when the 850 // user approaches N then we'd do another copy of the next N characters. 851 CharSequence text = mTextView.getText(); 852 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 853 mUpdateWordIteratorText = false; 854 } 855 return mWordIteratorWithText; 856 } 857 858 private long getCharRange(int offset) { 859 final int textLength = mTextView.getText().length(); 860 if (offset + 1 < textLength) { 861 final char currentChar = mTextView.getText().charAt(offset); 862 final char nextChar = mTextView.getText().charAt(offset + 1); 863 if (Character.isSurrogatePair(currentChar, nextChar)) { 864 return TextUtils.packRangeInLong(offset, offset + 2); 865 } 866 } 867 if (offset < textLength) { 868 return TextUtils.packRangeInLong(offset, offset + 1); 869 } 870 if (offset - 2 >= 0) { 871 final char previousChar = mTextView.getText().charAt(offset - 1); 872 final char previousPreviousChar = mTextView.getText().charAt(offset - 2); 873 if (Character.isSurrogatePair(previousPreviousChar, previousChar)) { 874 return TextUtils.packRangeInLong(offset - 2, offset); 875 } 876 } 877 if (offset - 1 >= 0) { 878 return TextUtils.packRangeInLong(offset - 1, offset); 879 } 880 return TextUtils.packRangeInLong(offset, offset); 881 } 882 883 private boolean touchPositionIsInSelection() { 884 int selectionStart = mTextView.getSelectionStart(); 885 int selectionEnd = mTextView.getSelectionEnd(); 886 887 if (selectionStart == selectionEnd) { 888 return false; 889 } 890 891 if (selectionStart > selectionEnd) { 892 int tmp = selectionStart; 893 selectionStart = selectionEnd; 894 selectionEnd = tmp; 895 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 896 } 897 898 SelectionModifierCursorController selectionController = getSelectionController(); 899 int minOffset = selectionController.getMinTouchOffset(); 900 int maxOffset = selectionController.getMaxTouchOffset(); 901 902 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 903 } 904 905 private PositionListener getPositionListener() { 906 if (mPositionListener == null) { 907 mPositionListener = new PositionListener(); 908 } 909 return mPositionListener; 910 } 911 912 private interface TextViewPositionListener { 913 public void updatePosition(int parentPositionX, int parentPositionY, 914 boolean parentPositionChanged, boolean parentScrolled); 915 } 916 917 private boolean isPositionVisible(final float positionX, final float positionY) { 918 synchronized (TEMP_POSITION) { 919 final float[] position = TEMP_POSITION; 920 position[0] = positionX; 921 position[1] = positionY; 922 View view = mTextView; 923 924 while (view != null) { 925 if (view != mTextView) { 926 // Local scroll is already taken into account in positionX/Y 927 position[0] -= view.getScrollX(); 928 position[1] -= view.getScrollY(); 929 } 930 931 if (position[0] < 0 || position[1] < 0 || 932 position[0] > view.getWidth() || position[1] > view.getHeight()) { 933 return false; 934 } 935 936 if (!view.getMatrix().isIdentity()) { 937 view.getMatrix().mapPoints(position); 938 } 939 940 position[0] += view.getLeft(); 941 position[1] += view.getTop(); 942 943 final ViewParent parent = view.getParent(); 944 if (parent instanceof View) { 945 view = (View) parent; 946 } else { 947 // We've reached the ViewRoot, stop iterating 948 view = null; 949 } 950 } 951 } 952 953 // We've been able to walk up the view hierarchy and the position was never clipped 954 return true; 955 } 956 957 private boolean isOffsetVisible(int offset) { 958 Layout layout = mTextView.getLayout(); 959 if (layout == null) return false; 960 961 final int line = layout.getLineForOffset(offset); 962 final int lineBottom = layout.getLineBottom(line); 963 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 964 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 965 lineBottom + mTextView.viewportToContentVerticalOffset()); 966 } 967 968 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 969 * in the view. Returns false when the position is in the empty space of left/right of text. 970 */ 971 private boolean isPositionOnText(float x, float y) { 972 Layout layout = mTextView.getLayout(); 973 if (layout == null) return false; 974 975 final int line = mTextView.getLineAtCoordinate(y); 976 x = mTextView.convertToLocalHorizontalCoordinate(x); 977 978 if (x < layout.getLineLeft(line)) return false; 979 if (x > layout.getLineRight(line)) return false; 980 return true; 981 } 982 983 public boolean performLongClick(boolean handled) { 984 // Long press in empty space moves cursor and starts the selection action mode. 985 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 986 mInsertionControllerEnabled) { 987 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 988 mLastDownPositionY); 989 stopSelectionActionMode(); 990 Selection.setSelection((Spannable) mTextView.getText(), offset); 991 getInsertionController().show(); 992 startSelectionActionModeWithoutSelection(); 993 handled = true; 994 } 995 996 if (!handled && mSelectionActionMode != null) { 997 if (touchPositionIsInSelection()) { 998 // Start a drag 999 final int start = mTextView.getSelectionStart(); 1000 final int end = mTextView.getSelectionEnd(); 1001 CharSequence selectedText = mTextView.getTransformedText(start, end); 1002 ClipData data = ClipData.newPlainText(null, selectedText); 1003 DragLocalState localState = new DragLocalState(mTextView, start, end); 1004 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 1005 View.DRAG_FLAG_GLOBAL); 1006 stopSelectionActionMode(); 1007 } else { 1008 stopSelectionActionMode(); 1009 startSelectionActionModeWithSelection(); 1010 } 1011 handled = true; 1012 } 1013 1014 // Start a new selection 1015 if (!handled) { 1016 handled = startSelectionActionModeWithSelection(); 1017 } 1018 1019 return handled; 1020 } 1021 1022 private long getLastTouchOffsets() { 1023 SelectionModifierCursorController selectionController = getSelectionController(); 1024 final int minOffset = selectionController.getMinTouchOffset(); 1025 final int maxOffset = selectionController.getMaxTouchOffset(); 1026 return TextUtils.packRangeInLong(minOffset, maxOffset); 1027 } 1028 1029 void onFocusChanged(boolean focused, int direction) { 1030 mShowCursor = SystemClock.uptimeMillis(); 1031 ensureEndedBatchEdit(); 1032 1033 if (focused) { 1034 int selStart = mTextView.getSelectionStart(); 1035 int selEnd = mTextView.getSelectionEnd(); 1036 1037 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1038 // mode for these, unless there was a specific selection already started. 1039 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1040 selEnd == mTextView.getText().length(); 1041 1042 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1043 !isFocusHighlighted; 1044 1045 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1046 // If a tap was used to give focus to that view, move cursor at tap position. 1047 // Has to be done before onTakeFocus, which can be overloaded. 1048 final int lastTapPosition = getLastTapPosition(); 1049 if (lastTapPosition >= 0) { 1050 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1051 } 1052 1053 // Note this may have to be moved out of the Editor class 1054 MovementMethod mMovement = mTextView.getMovementMethod(); 1055 if (mMovement != null) { 1056 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1057 } 1058 1059 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1060 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1061 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1062 // This special case ensure that we keep current selection in that case. 1063 // It would be better to know why the DecorView does not have focus at that time. 1064 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1065 selStart >= 0 && selEnd >= 0) { 1066 /* 1067 * Someone intentionally set the selection, so let them 1068 * do whatever it is that they wanted to do instead of 1069 * the default on-focus behavior. We reset the selection 1070 * here instead of just skipping the onTakeFocus() call 1071 * because some movement methods do something other than 1072 * just setting the selection in theirs and we still 1073 * need to go through that path. 1074 */ 1075 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1076 } 1077 1078 if (mSelectAllOnFocus) { 1079 mTextView.selectAllText(); 1080 } 1081 1082 mTouchFocusSelected = true; 1083 } 1084 1085 mFrozenWithFocus = false; 1086 mSelectionMoved = false; 1087 1088 if (mError != null) { 1089 showError(); 1090 } 1091 1092 makeBlink(); 1093 } else { 1094 if (mError != null) { 1095 hideError(); 1096 } 1097 // Don't leave us in the middle of a batch edit. 1098 mTextView.onEndBatchEdit(); 1099 1100 if (mTextView instanceof ExtractEditText) { 1101 // terminateTextSelectionMode removes selection, which we want to keep when 1102 // ExtractEditText goes out of focus. 1103 final int selStart = mTextView.getSelectionStart(); 1104 final int selEnd = mTextView.getSelectionEnd(); 1105 hideControllers(); 1106 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1107 } else { 1108 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1109 hideControllers(); 1110 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1111 downgradeEasyCorrectionSpans(); 1112 } 1113 1114 // No need to create the controller 1115 if (mSelectionModifierCursorController != null) { 1116 mSelectionModifierCursorController.resetTouchOffsets(); 1117 } 1118 } 1119 } 1120 1121 /** 1122 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1123 * span. 1124 */ 1125 private void downgradeEasyCorrectionSpans() { 1126 CharSequence text = mTextView.getText(); 1127 if (text instanceof Spannable) { 1128 Spannable spannable = (Spannable) text; 1129 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1130 spannable.length(), SuggestionSpan.class); 1131 for (int i = 0; i < suggestionSpans.length; i++) { 1132 int flags = suggestionSpans[i].getFlags(); 1133 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1134 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1135 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1136 suggestionSpans[i].setFlags(flags); 1137 } 1138 } 1139 } 1140 } 1141 1142 void sendOnTextChanged(int start, int after) { 1143 updateSpellCheckSpans(start, start + after, false); 1144 1145 // Flip flag to indicate the word iterator needs to have the text reset. 1146 mUpdateWordIteratorText = true; 1147 1148 // Hide the controllers as soon as text is modified (typing, procedural...) 1149 // We do not hide the span controllers, since they can be added when a new text is 1150 // inserted into the text view (voice IME). 1151 hideCursorControllers(); 1152 } 1153 1154 private int getLastTapPosition() { 1155 // No need to create the controller at that point, no last tap position saved 1156 if (mSelectionModifierCursorController != null) { 1157 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1158 if (lastTapPosition >= 0) { 1159 // Safety check, should not be possible. 1160 if (lastTapPosition > mTextView.getText().length()) { 1161 lastTapPosition = mTextView.getText().length(); 1162 } 1163 return lastTapPosition; 1164 } 1165 } 1166 1167 return -1; 1168 } 1169 1170 void onWindowFocusChanged(boolean hasWindowFocus) { 1171 if (hasWindowFocus) { 1172 if (mBlink != null) { 1173 mBlink.uncancel(); 1174 makeBlink(); 1175 } 1176 } else { 1177 if (mBlink != null) { 1178 mBlink.cancel(); 1179 } 1180 if (mInputContentType != null) { 1181 mInputContentType.enterDown = false; 1182 } 1183 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1184 hideControllers(); 1185 if (mSuggestionsPopupWindow != null) { 1186 mSuggestionsPopupWindow.onParentLostFocus(); 1187 } 1188 1189 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1190 ensureEndedBatchEdit(); 1191 } 1192 } 1193 1194 void onTouchEvent(MotionEvent event) { 1195 if (hasSelectionController()) { 1196 getSelectionController().onTouchEvent(event); 1197 } 1198 1199 if (mShowSuggestionRunnable != null) { 1200 mTextView.removeCallbacks(mShowSuggestionRunnable); 1201 mShowSuggestionRunnable = null; 1202 } 1203 1204 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1205 mLastDownPositionX = event.getX(); 1206 mLastDownPositionY = event.getY(); 1207 1208 // Reset this state; it will be re-set if super.onTouchEvent 1209 // causes focus to move to the view. 1210 mTouchFocusSelected = false; 1211 mIgnoreActionUpEvent = false; 1212 } 1213 } 1214 1215 public void beginBatchEdit() { 1216 mInBatchEditControllers = true; 1217 final InputMethodState ims = mInputMethodState; 1218 if (ims != null) { 1219 int nesting = ++ims.mBatchEditNesting; 1220 if (nesting == 1) { 1221 ims.mCursorChanged = false; 1222 ims.mChangedDelta = 0; 1223 if (ims.mContentChanged) { 1224 // We already have a pending change from somewhere else, 1225 // so turn this into a full update. 1226 ims.mChangedStart = 0; 1227 ims.mChangedEnd = mTextView.getText().length(); 1228 } else { 1229 ims.mChangedStart = EXTRACT_UNKNOWN; 1230 ims.mChangedEnd = EXTRACT_UNKNOWN; 1231 ims.mContentChanged = false; 1232 } 1233 mUndoInputFilter.beginBatchEdit(); 1234 mTextView.onBeginBatchEdit(); 1235 } 1236 } 1237 } 1238 1239 public void endBatchEdit() { 1240 mInBatchEditControllers = false; 1241 final InputMethodState ims = mInputMethodState; 1242 if (ims != null) { 1243 int nesting = --ims.mBatchEditNesting; 1244 if (nesting == 0) { 1245 finishBatchEdit(ims); 1246 } 1247 } 1248 } 1249 1250 void ensureEndedBatchEdit() { 1251 final InputMethodState ims = mInputMethodState; 1252 if (ims != null && ims.mBatchEditNesting != 0) { 1253 ims.mBatchEditNesting = 0; 1254 finishBatchEdit(ims); 1255 } 1256 } 1257 1258 void finishBatchEdit(final InputMethodState ims) { 1259 mTextView.onEndBatchEdit(); 1260 mUndoInputFilter.endBatchEdit(); 1261 1262 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1263 mTextView.updateAfterEdit(); 1264 reportExtractedText(); 1265 } else if (ims.mCursorChanged) { 1266 // Cheesy way to get us to report the current cursor location. 1267 mTextView.invalidateCursor(); 1268 } 1269 // sendUpdateSelection knows to avoid sending if the selection did 1270 // not actually change. 1271 sendUpdateSelection(); 1272 } 1273 1274 static final int EXTRACT_NOTHING = -2; 1275 static final int EXTRACT_UNKNOWN = -1; 1276 1277 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1278 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1279 EXTRACT_UNKNOWN, outText); 1280 } 1281 1282 private boolean extractTextInternal(ExtractedTextRequest request, 1283 int partialStartOffset, int partialEndOffset, int delta, 1284 ExtractedText outText) { 1285 final CharSequence content = mTextView.getText(); 1286 if (content != null) { 1287 if (partialStartOffset != EXTRACT_NOTHING) { 1288 final int N = content.length(); 1289 if (partialStartOffset < 0) { 1290 outText.partialStartOffset = outText.partialEndOffset = -1; 1291 partialStartOffset = 0; 1292 partialEndOffset = N; 1293 } else { 1294 // Now use the delta to determine the actual amount of text 1295 // we need. 1296 partialEndOffset += delta; 1297 // Adjust offsets to ensure we contain full spans. 1298 if (content instanceof Spanned) { 1299 Spanned spanned = (Spanned)content; 1300 Object[] spans = spanned.getSpans(partialStartOffset, 1301 partialEndOffset, ParcelableSpan.class); 1302 int i = spans.length; 1303 while (i > 0) { 1304 i--; 1305 int j = spanned.getSpanStart(spans[i]); 1306 if (j < partialStartOffset) partialStartOffset = j; 1307 j = spanned.getSpanEnd(spans[i]); 1308 if (j > partialEndOffset) partialEndOffset = j; 1309 } 1310 } 1311 outText.partialStartOffset = partialStartOffset; 1312 outText.partialEndOffset = partialEndOffset - delta; 1313 1314 if (partialStartOffset > N) { 1315 partialStartOffset = N; 1316 } else if (partialStartOffset < 0) { 1317 partialStartOffset = 0; 1318 } 1319 if (partialEndOffset > N) { 1320 partialEndOffset = N; 1321 } else if (partialEndOffset < 0) { 1322 partialEndOffset = 0; 1323 } 1324 } 1325 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1326 outText.text = content.subSequence(partialStartOffset, 1327 partialEndOffset); 1328 } else { 1329 outText.text = TextUtils.substring(content, partialStartOffset, 1330 partialEndOffset); 1331 } 1332 } else { 1333 outText.partialStartOffset = 0; 1334 outText.partialEndOffset = 0; 1335 outText.text = ""; 1336 } 1337 outText.flags = 0; 1338 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1339 outText.flags |= ExtractedText.FLAG_SELECTING; 1340 } 1341 if (mTextView.isSingleLine()) { 1342 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1343 } 1344 outText.startOffset = 0; 1345 outText.selectionStart = mTextView.getSelectionStart(); 1346 outText.selectionEnd = mTextView.getSelectionEnd(); 1347 return true; 1348 } 1349 return false; 1350 } 1351 1352 boolean reportExtractedText() { 1353 final Editor.InputMethodState ims = mInputMethodState; 1354 if (ims != null) { 1355 final boolean contentChanged = ims.mContentChanged; 1356 if (contentChanged || ims.mSelectionModeChanged) { 1357 ims.mContentChanged = false; 1358 ims.mSelectionModeChanged = false; 1359 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1360 if (req != null) { 1361 InputMethodManager imm = InputMethodManager.peekInstance(); 1362 if (imm != null) { 1363 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1364 "Retrieving extracted start=" + ims.mChangedStart + 1365 " end=" + ims.mChangedEnd + 1366 " delta=" + ims.mChangedDelta); 1367 if (ims.mChangedStart < 0 && !contentChanged) { 1368 ims.mChangedStart = EXTRACT_NOTHING; 1369 } 1370 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1371 ims.mChangedDelta, ims.mExtractedText)) { 1372 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1373 "Reporting extracted start=" + 1374 ims.mExtractedText.partialStartOffset + 1375 " end=" + ims.mExtractedText.partialEndOffset + 1376 ": " + ims.mExtractedText.text); 1377 1378 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1379 ims.mChangedStart = EXTRACT_UNKNOWN; 1380 ims.mChangedEnd = EXTRACT_UNKNOWN; 1381 ims.mChangedDelta = 0; 1382 ims.mContentChanged = false; 1383 return true; 1384 } 1385 } 1386 } 1387 } 1388 } 1389 return false; 1390 } 1391 1392 private void sendUpdateSelection() { 1393 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1394 final InputMethodManager imm = InputMethodManager.peekInstance(); 1395 if (null != imm) { 1396 final int selectionStart = mTextView.getSelectionStart(); 1397 final int selectionEnd = mTextView.getSelectionEnd(); 1398 int candStart = -1; 1399 int candEnd = -1; 1400 if (mTextView.getText() instanceof Spannable) { 1401 final Spannable sp = (Spannable) mTextView.getText(); 1402 candStart = EditableInputConnection.getComposingSpanStart(sp); 1403 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1404 } 1405 // InputMethodManager#updateSelection skips sending the message if 1406 // none of the parameters have changed since the last time we called it. 1407 imm.updateSelection(mTextView, 1408 selectionStart, selectionEnd, candStart, candEnd); 1409 } 1410 } 1411 } 1412 1413 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1414 int cursorOffsetVertical) { 1415 final int selectionStart = mTextView.getSelectionStart(); 1416 final int selectionEnd = mTextView.getSelectionEnd(); 1417 1418 final InputMethodState ims = mInputMethodState; 1419 if (ims != null && ims.mBatchEditNesting == 0) { 1420 InputMethodManager imm = InputMethodManager.peekInstance(); 1421 if (imm != null) { 1422 if (imm.isActive(mTextView)) { 1423 boolean reported = false; 1424 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1425 // We are in extract mode and the content has changed 1426 // in some way... just report complete new text to the 1427 // input method. 1428 reported = reportExtractedText(); 1429 } 1430 } 1431 } 1432 } 1433 1434 if (mCorrectionHighlighter != null) { 1435 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1436 } 1437 1438 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1439 drawCursor(canvas, cursorOffsetVertical); 1440 // Rely on the drawable entirely, do not draw the cursor line. 1441 // Has to be done after the IMM related code above which relies on the highlight. 1442 highlight = null; 1443 } 1444 1445 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1446 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1447 cursorOffsetVertical); 1448 } else { 1449 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1450 } 1451 } 1452 1453 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1454 Paint highlightPaint, int cursorOffsetVertical) { 1455 final long lineRange = layout.getLineRangeForDraw(canvas); 1456 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1457 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1458 if (lastLine < 0) return; 1459 1460 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1461 firstLine, lastLine); 1462 1463 if (layout instanceof DynamicLayout) { 1464 if (mTextDisplayLists == null) { 1465 mTextDisplayLists = ArrayUtils.emptyArray(TextDisplayList.class); 1466 } 1467 1468 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1469 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1470 int[] blockIndices = dynamicLayout.getBlockIndices(); 1471 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1472 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1473 1474 int endOfPreviousBlock = -1; 1475 int searchStartIndex = 0; 1476 for (int i = 0; i < numberOfBlocks; i++) { 1477 int blockEndLine = blockEndLines[i]; 1478 int blockIndex = blockIndices[i]; 1479 1480 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1481 if (blockIsInvalid) { 1482 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1483 searchStartIndex); 1484 // Note how dynamic layout's internal block indices get updated from Editor 1485 blockIndices[i] = blockIndex; 1486 if (mTextDisplayLists[blockIndex] != null) { 1487 mTextDisplayLists[blockIndex].isDirty = true; 1488 } 1489 searchStartIndex = blockIndex + 1; 1490 } 1491 1492 if (mTextDisplayLists[blockIndex] == null) { 1493 mTextDisplayLists[blockIndex] = 1494 new TextDisplayList("Text " + blockIndex); 1495 } 1496 1497 final boolean blockDisplayListIsInvalid = mTextDisplayLists[blockIndex].needsRecord(); 1498 RenderNode blockDisplayList = mTextDisplayLists[blockIndex].displayList; 1499 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1500 final int blockBeginLine = endOfPreviousBlock + 1; 1501 final int top = layout.getLineTop(blockBeginLine); 1502 final int bottom = layout.getLineBottom(blockEndLine); 1503 int left = 0; 1504 int right = mTextView.getWidth(); 1505 if (mTextView.getHorizontallyScrolling()) { 1506 float min = Float.MAX_VALUE; 1507 float max = Float.MIN_VALUE; 1508 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1509 min = Math.min(min, layout.getLineLeft(line)); 1510 max = Math.max(max, layout.getLineRight(line)); 1511 } 1512 left = (int) min; 1513 right = (int) (max + 0.5f); 1514 } 1515 1516 // Rebuild display list if it is invalid 1517 if (blockDisplayListIsInvalid) { 1518 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1519 right - left, bottom - top); 1520 try { 1521 // drawText is always relative to TextView's origin, this translation 1522 // brings this range of text back to the top left corner of the viewport 1523 displayListCanvas.translate(-left, -top); 1524 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1525 mTextDisplayLists[blockIndex].isDirty = false; 1526 // No need to untranslate, previous context is popped after 1527 // drawDisplayList 1528 } finally { 1529 blockDisplayList.end(displayListCanvas); 1530 // Same as drawDisplayList below, handled by our TextView's parent 1531 blockDisplayList.setClipToBounds(false); 1532 } 1533 } 1534 1535 // Valid disply list whose index is >= indexFirstChangedBlock 1536 // only needs to update its drawing location. 1537 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1538 } 1539 1540 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList, 1541 0 /* no child clipping, our TextView parent enforces it */); 1542 1543 endOfPreviousBlock = blockEndLine; 1544 } 1545 1546 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1547 } else { 1548 // Boring layout is used for empty and hint text 1549 layout.drawText(canvas, firstLine, lastLine); 1550 } 1551 } 1552 1553 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1554 int searchStartIndex) { 1555 int length = mTextDisplayLists.length; 1556 for (int i = searchStartIndex; i < length; i++) { 1557 boolean blockIndexFound = false; 1558 for (int j = 0; j < numberOfBlocks; j++) { 1559 if (blockIndices[j] == i) { 1560 blockIndexFound = true; 1561 break; 1562 } 1563 } 1564 if (blockIndexFound) continue; 1565 return i; 1566 } 1567 1568 // No available index found, the pool has to grow 1569 mTextDisplayLists = GrowingArrayUtils.append(mTextDisplayLists, length, null); 1570 return length; 1571 } 1572 1573 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1574 final boolean translate = cursorOffsetVertical != 0; 1575 if (translate) canvas.translate(0, cursorOffsetVertical); 1576 for (int i = 0; i < mCursorCount; i++) { 1577 mCursorDrawable[i].draw(canvas); 1578 } 1579 if (translate) canvas.translate(0, -cursorOffsetVertical); 1580 } 1581 1582 /** 1583 * Invalidates all the sub-display lists that overlap the specified character range 1584 */ 1585 void invalidateTextDisplayList(Layout layout, int start, int end) { 1586 if (mTextDisplayLists != null && layout instanceof DynamicLayout) { 1587 final int firstLine = layout.getLineForOffset(start); 1588 final int lastLine = layout.getLineForOffset(end); 1589 1590 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1591 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1592 int[] blockIndices = dynamicLayout.getBlockIndices(); 1593 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1594 1595 int i = 0; 1596 // Skip the blocks before firstLine 1597 while (i < numberOfBlocks) { 1598 if (blockEndLines[i] >= firstLine) break; 1599 i++; 1600 } 1601 1602 // Invalidate all subsequent blocks until lastLine is passed 1603 while (i < numberOfBlocks) { 1604 final int blockIndex = blockIndices[i]; 1605 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1606 mTextDisplayLists[blockIndex].isDirty = true; 1607 } 1608 if (blockEndLines[i] >= lastLine) break; 1609 i++; 1610 } 1611 } 1612 } 1613 1614 void invalidateTextDisplayList() { 1615 if (mTextDisplayLists != null) { 1616 for (int i = 0; i < mTextDisplayLists.length; i++) { 1617 if (mTextDisplayLists[i] != null) mTextDisplayLists[i].isDirty = true; 1618 } 1619 } 1620 } 1621 1622 void updateCursorsPositions() { 1623 if (mTextView.mCursorDrawableRes == 0) { 1624 mCursorCount = 0; 1625 return; 1626 } 1627 1628 Layout layout = mTextView.getLayout(); 1629 Layout hintLayout = mTextView.getHintLayout(); 1630 final int offset = mTextView.getSelectionStart(); 1631 final int line = layout.getLineForOffset(offset); 1632 final int top = layout.getLineTop(line); 1633 final int bottom = layout.getLineTop(line + 1); 1634 1635 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1636 1637 int middle = bottom; 1638 if (mCursorCount == 2) { 1639 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1640 middle = (top + bottom) >> 1; 1641 } 1642 1643 boolean clamped = layout.shouldClampCursor(line); 1644 updateCursorPosition(0, top, middle, 1645 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1646 1647 if (mCursorCount == 2) { 1648 updateCursorPosition(1, middle, bottom, 1649 layout.getSecondaryHorizontal(offset, clamped)); 1650 } 1651 } 1652 1653 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1654 boolean clamped) { 1655 if (TextUtils.isEmpty(layout.getText()) && 1656 hintLayout != null && 1657 !TextUtils.isEmpty(hintLayout.getText())) { 1658 return hintLayout.getPrimaryHorizontal(offset, clamped); 1659 } else { 1660 return layout.getPrimaryHorizontal(offset, clamped); 1661 } 1662 } 1663 1664 /** 1665 * @return true if the selection mode was actually started. 1666 */ 1667 private boolean startSelectionActionModeWithoutSelection() { 1668 if (mSelectionActionMode != null) { 1669 // Selection action mode is already started 1670 // TODO: revisit invocations to minimize this case. 1671 mSelectionActionMode.invalidate(); 1672 return false; 1673 } 1674 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1675 mSelectionActionMode = mTextView.startActionMode( 1676 actionModeCallback, ActionMode.TYPE_FLOATING); 1677 return mSelectionActionMode != null; 1678 } 1679 1680 /** 1681 * @return true if the selection mode was actually started. 1682 */ 1683 boolean startSelectionActionModeWithSelection() { 1684 if (mSelectionActionMode != null) { 1685 // Selection action mode is already started 1686 mSelectionActionMode.invalidate(); 1687 return false; 1688 } 1689 1690 if (!canSelectText() || !mTextView.requestFocus()) { 1691 Log.w(TextView.LOG_TAG, 1692 "TextView does not support text selection. Action mode cancelled."); 1693 return false; 1694 } 1695 1696 if (!mTextView.hasSelection()) { 1697 // There may already be a selection on device rotation 1698 if (!selectCurrentWord()) { 1699 // No word found under cursor or text selection not permitted. 1700 return false; 1701 } 1702 } 1703 1704 boolean willExtract = extractedTextModeWillBeStarted(); 1705 1706 // Do not start the action mode when extracted text will show up full screen, which would 1707 // immediately hide the newly created action bar and would be visually distracting. 1708 if (!willExtract) { 1709 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1710 mSelectionActionMode = mTextView.startActionMode( 1711 actionModeCallback, ActionMode.TYPE_FLOATING); 1712 } 1713 1714 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1715 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1716 // Show the IME to be able to replace text, except when selecting non editable text. 1717 final InputMethodManager imm = InputMethodManager.peekInstance(); 1718 if (imm != null) { 1719 imm.showSoftInput(mTextView, 0, null); 1720 } 1721 } 1722 1723 if (selectionStarted) { 1724 getSelectionController().enterDrag(); 1725 } 1726 return selectionStarted; 1727 } 1728 1729 private boolean extractedTextModeWillBeStarted() { 1730 if (!(mTextView instanceof ExtractEditText)) { 1731 final InputMethodManager imm = InputMethodManager.peekInstance(); 1732 return imm != null && imm.isFullscreenMode(); 1733 } 1734 return false; 1735 } 1736 1737 /** 1738 * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}. 1739 */ 1740 private boolean isCursorInsideSuggestionSpan() { 1741 CharSequence text = mTextView.getText(); 1742 if (!(text instanceof Spannable)) return false; 1743 1744 SuggestionSpan[] suggestionSpans = ((Spannable) text).getSpans( 1745 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), SuggestionSpan.class); 1746 return (suggestionSpans.length > 0); 1747 } 1748 1749 /** 1750 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1751 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1752 */ 1753 private boolean isCursorInsideEasyCorrectionSpan() { 1754 Spannable spannable = (Spannable) mTextView.getText(); 1755 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1756 mTextView.getSelectionEnd(), SuggestionSpan.class); 1757 for (int i = 0; i < suggestionSpans.length; i++) { 1758 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1759 return true; 1760 } 1761 } 1762 return false; 1763 } 1764 1765 void onTouchUpEvent(MotionEvent event) { 1766 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1767 hideControllers(); 1768 CharSequence text = mTextView.getText(); 1769 if (!selectAllGotFocus && text.length() > 0) { 1770 // Move cursor 1771 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1772 Selection.setSelection((Spannable) text, offset); 1773 if (mSpellChecker != null) { 1774 // When the cursor moves, the word that was typed may need spell check 1775 mSpellChecker.onSelectionChanged(); 1776 } 1777 if (!extractedTextModeWillBeStarted()) { 1778 if (isCursorInsideEasyCorrectionSpan()) { 1779 mShowSuggestionRunnable = new Runnable() { 1780 public void run() { 1781 showSuggestions(); 1782 } 1783 }; 1784 // removeCallbacks is performed on every touch 1785 mTextView.postDelayed(mShowSuggestionRunnable, 1786 ViewConfiguration.getDoubleTapTimeout()); 1787 } else if (hasInsertionController()) { 1788 getInsertionController().show(); 1789 } 1790 } 1791 } 1792 } 1793 1794 protected void stopSelectionActionMode() { 1795 if (mSelectionActionMode != null) { 1796 // This will hide the mSelectionModifierCursorController 1797 mSelectionActionMode.finish(); 1798 } 1799 } 1800 1801 /** 1802 * @return True if this view supports insertion handles. 1803 */ 1804 boolean hasInsertionController() { 1805 return mInsertionControllerEnabled; 1806 } 1807 1808 /** 1809 * @return True if this view supports selection handles. 1810 */ 1811 boolean hasSelectionController() { 1812 return mSelectionControllerEnabled; 1813 } 1814 1815 InsertionPointCursorController getInsertionController() { 1816 if (!mInsertionControllerEnabled) { 1817 return null; 1818 } 1819 1820 if (mInsertionPointCursorController == null) { 1821 mInsertionPointCursorController = new InsertionPointCursorController(); 1822 1823 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1824 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1825 } 1826 1827 return mInsertionPointCursorController; 1828 } 1829 1830 SelectionModifierCursorController getSelectionController() { 1831 if (!mSelectionControllerEnabled) { 1832 return null; 1833 } 1834 1835 if (mSelectionModifierCursorController == null) { 1836 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1837 1838 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1839 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1840 } 1841 1842 return mSelectionModifierCursorController; 1843 } 1844 1845 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1846 if (mCursorDrawable[cursorIndex] == null) 1847 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1848 mTextView.mCursorDrawableRes); 1849 1850 if (mTempRect == null) mTempRect = new Rect(); 1851 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1852 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1853 horizontal = Math.max(0.5f, horizontal - 0.5f); 1854 final int left = (int) (horizontal) - mTempRect.left; 1855 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1856 bottom + mTempRect.bottom); 1857 } 1858 1859 /** 1860 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1861 * a dictionary) from the current input method, provided by it calling 1862 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1863 * implementation flashes the background of the corrected word to provide feedback to the user. 1864 * 1865 * @param info The auto correct info about the text that was corrected. 1866 */ 1867 public void onCommitCorrection(CorrectionInfo info) { 1868 if (mCorrectionHighlighter == null) { 1869 mCorrectionHighlighter = new CorrectionHighlighter(); 1870 } else { 1871 mCorrectionHighlighter.invalidate(false); 1872 } 1873 1874 mCorrectionHighlighter.highlight(info); 1875 } 1876 1877 void showSuggestions() { 1878 if (mSuggestionsPopupWindow == null) { 1879 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1880 } 1881 hideControllers(); 1882 mSuggestionsPopupWindow.show(); 1883 } 1884 1885 boolean areSuggestionsShown() { 1886 return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing(); 1887 } 1888 1889 void onScrollChanged() { 1890 if (mPositionListener != null) { 1891 mPositionListener.onScrollChanged(); 1892 } 1893 } 1894 1895 /** 1896 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1897 */ 1898 private boolean shouldBlink() { 1899 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1900 1901 final int start = mTextView.getSelectionStart(); 1902 if (start < 0) return false; 1903 1904 final int end = mTextView.getSelectionEnd(); 1905 if (end < 0) return false; 1906 1907 return start == end; 1908 } 1909 1910 void makeBlink() { 1911 if (shouldBlink()) { 1912 mShowCursor = SystemClock.uptimeMillis(); 1913 if (mBlink == null) mBlink = new Blink(); 1914 mBlink.removeCallbacks(mBlink); 1915 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 1916 } else { 1917 if (mBlink != null) mBlink.removeCallbacks(mBlink); 1918 } 1919 } 1920 1921 private class Blink extends Handler implements Runnable { 1922 private boolean mCancelled; 1923 1924 public void run() { 1925 if (mCancelled) { 1926 return; 1927 } 1928 1929 removeCallbacks(Blink.this); 1930 1931 if (shouldBlink()) { 1932 if (mTextView.getLayout() != null) { 1933 mTextView.invalidateCursorPath(); 1934 } 1935 1936 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 1937 } 1938 } 1939 1940 void cancel() { 1941 if (!mCancelled) { 1942 removeCallbacks(Blink.this); 1943 mCancelled = true; 1944 } 1945 } 1946 1947 void uncancel() { 1948 mCancelled = false; 1949 } 1950 } 1951 1952 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 1953 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 1954 com.android.internal.R.layout.text_drag_thumbnail, null); 1955 1956 if (shadowView == null) { 1957 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 1958 } 1959 1960 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 1961 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 1962 } 1963 shadowView.setText(text); 1964 shadowView.setTextColor(mTextView.getTextColors()); 1965 1966 shadowView.setTextAppearance(mTextView.getContext(), R.styleable.Theme_textAppearanceLarge); 1967 shadowView.setGravity(Gravity.CENTER); 1968 1969 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 1970 ViewGroup.LayoutParams.WRAP_CONTENT)); 1971 1972 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 1973 shadowView.measure(size, size); 1974 1975 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 1976 shadowView.invalidate(); 1977 return new DragShadowBuilder(shadowView); 1978 } 1979 1980 private static class DragLocalState { 1981 public TextView sourceTextView; 1982 public int start, end; 1983 1984 public DragLocalState(TextView sourceTextView, int start, int end) { 1985 this.sourceTextView = sourceTextView; 1986 this.start = start; 1987 this.end = end; 1988 } 1989 } 1990 1991 void onDrop(DragEvent event) { 1992 StringBuilder content = new StringBuilder(""); 1993 ClipData clipData = event.getClipData(); 1994 final int itemCount = clipData.getItemCount(); 1995 for (int i=0; i < itemCount; i++) { 1996 Item item = clipData.getItemAt(i); 1997 content.append(item.coerceToStyledText(mTextView.getContext())); 1998 } 1999 2000 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2001 2002 Object localState = event.getLocalState(); 2003 DragLocalState dragLocalState = null; 2004 if (localState instanceof DragLocalState) { 2005 dragLocalState = (DragLocalState) localState; 2006 } 2007 boolean dragDropIntoItself = dragLocalState != null && 2008 dragLocalState.sourceTextView == mTextView; 2009 2010 if (dragDropIntoItself) { 2011 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2012 // A drop inside the original selection discards the drop. 2013 return; 2014 } 2015 } 2016 2017 final int originalLength = mTextView.getText().length(); 2018 int min = offset; 2019 int max = offset; 2020 2021 Selection.setSelection((Spannable) mTextView.getText(), max); 2022 mTextView.replaceText_internal(min, max, content); 2023 2024 if (dragDropIntoItself) { 2025 int dragSourceStart = dragLocalState.start; 2026 int dragSourceEnd = dragLocalState.end; 2027 if (max <= dragSourceStart) { 2028 // Inserting text before selection has shifted positions 2029 final int shift = mTextView.getText().length() - originalLength; 2030 dragSourceStart += shift; 2031 dragSourceEnd += shift; 2032 } 2033 2034 // Delete original selection 2035 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2036 2037 // Make sure we do not leave two adjacent spaces. 2038 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2039 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2040 if (nextCharIdx > prevCharIdx + 1) { 2041 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2042 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2043 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2044 } 2045 } 2046 } 2047 } 2048 2049 public void addSpanWatchers(Spannable text) { 2050 final int textLength = text.length(); 2051 2052 if (mKeyListener != null) { 2053 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2054 } 2055 2056 if (mSpanController == null) { 2057 mSpanController = new SpanController(); 2058 } 2059 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2060 } 2061 2062 /** 2063 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2064 * pop-up should be displayed. 2065 * Also monitors {@link Selection} to call back to the attached input method. 2066 */ 2067 class SpanController implements SpanWatcher { 2068 2069 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2070 2071 private EasyEditPopupWindow mPopupWindow; 2072 2073 private Runnable mHidePopup; 2074 2075 // This function is pure but inner classes can't have static functions 2076 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2077 final Object span) { 2078 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2079 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2080 } 2081 2082 @Override 2083 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2084 if (isNonIntermediateSelectionSpan(text, span)) { 2085 sendUpdateSelection(); 2086 } else if (span instanceof EasyEditSpan) { 2087 if (mPopupWindow == null) { 2088 mPopupWindow = new EasyEditPopupWindow(); 2089 mHidePopup = new Runnable() { 2090 @Override 2091 public void run() { 2092 hide(); 2093 } 2094 }; 2095 } 2096 2097 // Make sure there is only at most one EasyEditSpan in the text 2098 if (mPopupWindow.mEasyEditSpan != null) { 2099 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2100 } 2101 2102 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2103 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2104 @Override 2105 public void onDeleteClick(EasyEditSpan span) { 2106 Editable editable = (Editable) mTextView.getText(); 2107 int start = editable.getSpanStart(span); 2108 int end = editable.getSpanEnd(span); 2109 if (start >= 0 && end >= 0) { 2110 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2111 mTextView.deleteText_internal(start, end); 2112 } 2113 editable.removeSpan(span); 2114 } 2115 }); 2116 2117 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2118 // The window is not visible yet, ignore the text change. 2119 return; 2120 } 2121 2122 if (mTextView.getLayout() == null) { 2123 // The view has not been laid out yet, ignore the text change 2124 return; 2125 } 2126 2127 if (extractedTextModeWillBeStarted()) { 2128 // The input is in extract mode. Do not handle the easy edit in 2129 // the original TextView, as the ExtractEditText will do 2130 return; 2131 } 2132 2133 mPopupWindow.show(); 2134 mTextView.removeCallbacks(mHidePopup); 2135 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2136 } 2137 } 2138 2139 @Override 2140 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2141 if (isNonIntermediateSelectionSpan(text, span)) { 2142 sendUpdateSelection(); 2143 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2144 hide(); 2145 } 2146 } 2147 2148 @Override 2149 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2150 int newStart, int newEnd) { 2151 if (isNonIntermediateSelectionSpan(text, span)) { 2152 sendUpdateSelection(); 2153 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2154 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2155 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2156 text.removeSpan(easyEditSpan); 2157 } 2158 } 2159 2160 public void hide() { 2161 if (mPopupWindow != null) { 2162 mPopupWindow.hide(); 2163 mTextView.removeCallbacks(mHidePopup); 2164 } 2165 } 2166 2167 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2168 try { 2169 PendingIntent pendingIntent = span.getPendingIntent(); 2170 if (pendingIntent != null) { 2171 Intent intent = new Intent(); 2172 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2173 pendingIntent.send(mTextView.getContext(), 0, intent); 2174 } 2175 } catch (CanceledException e) { 2176 // This should not happen, as we should try to send the intent only once. 2177 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2178 } 2179 } 2180 } 2181 2182 /** 2183 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2184 */ 2185 private interface EasyEditDeleteListener { 2186 2187 /** 2188 * Clicks the delete pop-up. 2189 */ 2190 void onDeleteClick(EasyEditSpan span); 2191 } 2192 2193 /** 2194 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2195 * by {@link SpanController}. 2196 */ 2197 private class EasyEditPopupWindow extends PinnedPopupWindow 2198 implements OnClickListener { 2199 private static final int POPUP_TEXT_LAYOUT = 2200 com.android.internal.R.layout.text_edit_action_popup_text; 2201 private TextView mDeleteTextView; 2202 private EasyEditSpan mEasyEditSpan; 2203 private EasyEditDeleteListener mOnDeleteListener; 2204 2205 @Override 2206 protected void createPopupWindow() { 2207 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2208 com.android.internal.R.attr.textSelectHandleWindowStyle); 2209 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2210 mPopupWindow.setClippingEnabled(true); 2211 } 2212 2213 @Override 2214 protected void initContentView() { 2215 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2216 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2217 mContentView = linearLayout; 2218 mContentView.setBackgroundResource( 2219 com.android.internal.R.drawable.text_edit_side_paste_window); 2220 2221 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2222 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2223 2224 LayoutParams wrapContent = new LayoutParams( 2225 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2226 2227 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2228 mDeleteTextView.setLayoutParams(wrapContent); 2229 mDeleteTextView.setText(com.android.internal.R.string.delete); 2230 mDeleteTextView.setOnClickListener(this); 2231 mContentView.addView(mDeleteTextView); 2232 } 2233 2234 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2235 mEasyEditSpan = easyEditSpan; 2236 } 2237 2238 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2239 mOnDeleteListener = listener; 2240 } 2241 2242 @Override 2243 public void onClick(View view) { 2244 if (view == mDeleteTextView 2245 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2246 && mOnDeleteListener != null) { 2247 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2248 } 2249 } 2250 2251 @Override 2252 public void hide() { 2253 if (mEasyEditSpan != null) { 2254 mEasyEditSpan.setDeleteEnabled(false); 2255 } 2256 mOnDeleteListener = null; 2257 super.hide(); 2258 } 2259 2260 @Override 2261 protected int getTextOffset() { 2262 // Place the pop-up at the end of the span 2263 Editable editable = (Editable) mTextView.getText(); 2264 return editable.getSpanEnd(mEasyEditSpan); 2265 } 2266 2267 @Override 2268 protected int getVerticalLocalPosition(int line) { 2269 return mTextView.getLayout().getLineBottom(line); 2270 } 2271 2272 @Override 2273 protected int clipVertically(int positionY) { 2274 // As we display the pop-up below the span, no vertical clipping is required. 2275 return positionY; 2276 } 2277 } 2278 2279 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2280 // 3 handles 2281 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2282 // 1 CursorAnchorInfoNotifier 2283 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2284 private TextViewPositionListener[] mPositionListeners = 2285 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2286 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2287 private boolean mPositionHasChanged = true; 2288 // Absolute position of the TextView with respect to its parent window 2289 private int mPositionX, mPositionY; 2290 private int mNumberOfListeners; 2291 private boolean mScrollHasChanged; 2292 final int[] mTempCoords = new int[2]; 2293 2294 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2295 if (mNumberOfListeners == 0) { 2296 updatePosition(); 2297 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2298 vto.addOnPreDrawListener(this); 2299 } 2300 2301 int emptySlotIndex = -1; 2302 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2303 TextViewPositionListener listener = mPositionListeners[i]; 2304 if (listener == positionListener) { 2305 return; 2306 } else if (emptySlotIndex < 0 && listener == null) { 2307 emptySlotIndex = i; 2308 } 2309 } 2310 2311 mPositionListeners[emptySlotIndex] = positionListener; 2312 mCanMove[emptySlotIndex] = canMove; 2313 mNumberOfListeners++; 2314 } 2315 2316 public void removeSubscriber(TextViewPositionListener positionListener) { 2317 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2318 if (mPositionListeners[i] == positionListener) { 2319 mPositionListeners[i] = null; 2320 mNumberOfListeners--; 2321 break; 2322 } 2323 } 2324 2325 if (mNumberOfListeners == 0) { 2326 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2327 vto.removeOnPreDrawListener(this); 2328 } 2329 } 2330 2331 public int getPositionX() { 2332 return mPositionX; 2333 } 2334 2335 public int getPositionY() { 2336 return mPositionY; 2337 } 2338 2339 @Override 2340 public boolean onPreDraw() { 2341 updatePosition(); 2342 2343 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2344 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2345 TextViewPositionListener positionListener = mPositionListeners[i]; 2346 if (positionListener != null) { 2347 positionListener.updatePosition(mPositionX, mPositionY, 2348 mPositionHasChanged, mScrollHasChanged); 2349 } 2350 } 2351 } 2352 2353 mScrollHasChanged = false; 2354 return true; 2355 } 2356 2357 private void updatePosition() { 2358 mTextView.getLocationInWindow(mTempCoords); 2359 2360 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2361 2362 mPositionX = mTempCoords[0]; 2363 mPositionY = mTempCoords[1]; 2364 } 2365 2366 public void onScrollChanged() { 2367 mScrollHasChanged = true; 2368 } 2369 } 2370 2371 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2372 protected PopupWindow mPopupWindow; 2373 protected ViewGroup mContentView; 2374 int mPositionX, mPositionY; 2375 2376 protected abstract void createPopupWindow(); 2377 protected abstract void initContentView(); 2378 protected abstract int getTextOffset(); 2379 protected abstract int getVerticalLocalPosition(int line); 2380 protected abstract int clipVertically(int positionY); 2381 2382 public PinnedPopupWindow() { 2383 createPopupWindow(); 2384 2385 mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 2386 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2387 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2388 2389 initContentView(); 2390 2391 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2392 ViewGroup.LayoutParams.WRAP_CONTENT); 2393 mContentView.setLayoutParams(wrapContent); 2394 2395 mPopupWindow.setContentView(mContentView); 2396 } 2397 2398 public void show() { 2399 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2400 2401 computeLocalPosition(); 2402 2403 final PositionListener positionListener = getPositionListener(); 2404 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2405 } 2406 2407 protected void measureContent() { 2408 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2409 mContentView.measure( 2410 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2411 View.MeasureSpec.AT_MOST), 2412 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2413 View.MeasureSpec.AT_MOST)); 2414 } 2415 2416 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2417 * positioned according to viewportToContentHorizontalOffset. 2418 * 2419 * This method assumes that mContentView has properly been measured from its content. */ 2420 private void computeLocalPosition() { 2421 measureContent(); 2422 final int width = mContentView.getMeasuredWidth(); 2423 final int offset = getTextOffset(); 2424 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2425 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2426 2427 final int line = mTextView.getLayout().getLineForOffset(offset); 2428 mPositionY = getVerticalLocalPosition(line); 2429 mPositionY += mTextView.viewportToContentVerticalOffset(); 2430 } 2431 2432 private void updatePosition(int parentPositionX, int parentPositionY) { 2433 int positionX = parentPositionX + mPositionX; 2434 int positionY = parentPositionY + mPositionY; 2435 2436 positionY = clipVertically(positionY); 2437 2438 // Horizontal clipping 2439 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2440 final int width = mContentView.getMeasuredWidth(); 2441 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2442 positionX = Math.max(0, positionX); 2443 2444 if (isShowing()) { 2445 mPopupWindow.update(positionX, positionY, -1, -1); 2446 } else { 2447 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2448 positionX, positionY); 2449 } 2450 } 2451 2452 public void hide() { 2453 mPopupWindow.dismiss(); 2454 getPositionListener().removeSubscriber(this); 2455 } 2456 2457 @Override 2458 public void updatePosition(int parentPositionX, int parentPositionY, 2459 boolean parentPositionChanged, boolean parentScrolled) { 2460 // Either parentPositionChanged or parentScrolled is true, check if still visible 2461 if (isShowing() && isOffsetVisible(getTextOffset())) { 2462 if (parentScrolled) computeLocalPosition(); 2463 updatePosition(parentPositionX, parentPositionY); 2464 } else { 2465 hide(); 2466 } 2467 } 2468 2469 public boolean isShowing() { 2470 return mPopupWindow.isShowing(); 2471 } 2472 } 2473 2474 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2475 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2476 private static final int ADD_TO_DICTIONARY = -1; 2477 private static final int DELETE_TEXT = -2; 2478 private SuggestionInfo[] mSuggestionInfos; 2479 private int mNumberOfSuggestions; 2480 private boolean mCursorWasVisibleBeforeSuggestions; 2481 private boolean mIsShowingUp = false; 2482 private SuggestionAdapter mSuggestionsAdapter; 2483 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2484 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2485 2486 private class CustomPopupWindow extends PopupWindow { 2487 public CustomPopupWindow(Context context, int defStyleAttr) { 2488 super(context, null, defStyleAttr); 2489 } 2490 2491 @Override 2492 public void dismiss() { 2493 super.dismiss(); 2494 2495 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2496 2497 // Safe cast since show() checks that mTextView.getText() is an Editable 2498 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2499 2500 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2501 if (hasInsertionController()) { 2502 getInsertionController().show(); 2503 } 2504 } 2505 } 2506 2507 public SuggestionsPopupWindow() { 2508 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2509 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2510 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2511 } 2512 2513 @Override 2514 protected void createPopupWindow() { 2515 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2516 com.android.internal.R.attr.textSuggestionsWindowStyle); 2517 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2518 mPopupWindow.setFocusable(true); 2519 mPopupWindow.setClippingEnabled(false); 2520 } 2521 2522 @Override 2523 protected void initContentView() { 2524 ListView listView = new ListView(mTextView.getContext()); 2525 mSuggestionsAdapter = new SuggestionAdapter(); 2526 listView.setAdapter(mSuggestionsAdapter); 2527 listView.setOnItemClickListener(this); 2528 mContentView = listView; 2529 2530 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2531 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2532 for (int i = 0; i < mSuggestionInfos.length; i++) { 2533 mSuggestionInfos[i] = new SuggestionInfo(); 2534 } 2535 } 2536 2537 public boolean isShowingUp() { 2538 return mIsShowingUp; 2539 } 2540 2541 public void onParentLostFocus() { 2542 mIsShowingUp = false; 2543 } 2544 2545 private class SuggestionInfo { 2546 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2547 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2548 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2549 SpannableStringBuilder text = new SpannableStringBuilder(); 2550 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2551 android.R.style.TextAppearance_SuggestionHighlight); 2552 } 2553 2554 private class SuggestionAdapter extends BaseAdapter { 2555 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2556 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2557 2558 @Override 2559 public int getCount() { 2560 return mNumberOfSuggestions; 2561 } 2562 2563 @Override 2564 public Object getItem(int position) { 2565 return mSuggestionInfos[position]; 2566 } 2567 2568 @Override 2569 public long getItemId(int position) { 2570 return position; 2571 } 2572 2573 @Override 2574 public View getView(int position, View convertView, ViewGroup parent) { 2575 TextView textView = (TextView) convertView; 2576 2577 if (textView == null) { 2578 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2579 parent, false); 2580 } 2581 2582 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2583 textView.setText(suggestionInfo.text); 2584 2585 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2586 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2587 textView.setBackgroundColor(Color.TRANSPARENT); 2588 } else { 2589 textView.setBackgroundColor(Color.WHITE); 2590 } 2591 2592 return textView; 2593 } 2594 } 2595 2596 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2597 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2598 final int flag1 = span1.getFlags(); 2599 final int flag2 = span2.getFlags(); 2600 if (flag1 != flag2) { 2601 // The order here should match what is used in updateDrawState 2602 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2603 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2604 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2605 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2606 if (easy1 && !misspelled1) return -1; 2607 if (easy2 && !misspelled2) return 1; 2608 if (misspelled1) return -1; 2609 if (misspelled2) return 1; 2610 } 2611 2612 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2613 } 2614 } 2615 2616 /** 2617 * Returns the suggestion spans that cover the current cursor position. The suggestion 2618 * spans are sorted according to the length of text that they are attached to. 2619 */ 2620 private SuggestionSpan[] getSuggestionSpans() { 2621 int pos = mTextView.getSelectionStart(); 2622 Spannable spannable = (Spannable) mTextView.getText(); 2623 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2624 2625 mSpansLengths.clear(); 2626 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2627 int start = spannable.getSpanStart(suggestionSpan); 2628 int end = spannable.getSpanEnd(suggestionSpan); 2629 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2630 } 2631 2632 // The suggestions are sorted according to their types (easy correction first, then 2633 // misspelled) and to the length of the text that they cover (shorter first). 2634 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2635 return suggestionSpans; 2636 } 2637 2638 @Override 2639 public void show() { 2640 if (!(mTextView.getText() instanceof Editable)) return; 2641 2642 if (updateSuggestions()) { 2643 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2644 mTextView.setCursorVisible(false); 2645 mIsShowingUp = true; 2646 super.show(); 2647 } 2648 } 2649 2650 @Override 2651 protected void measureContent() { 2652 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2653 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2654 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2655 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2656 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2657 2658 int width = 0; 2659 View view = null; 2660 for (int i = 0; i < mNumberOfSuggestions; i++) { 2661 view = mSuggestionsAdapter.getView(i, view, mContentView); 2662 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2663 view.measure(horizontalMeasure, verticalMeasure); 2664 width = Math.max(width, view.getMeasuredWidth()); 2665 } 2666 2667 // Enforce the width based on actual text widths 2668 mContentView.measure( 2669 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2670 verticalMeasure); 2671 2672 Drawable popupBackground = mPopupWindow.getBackground(); 2673 if (popupBackground != null) { 2674 if (mTempRect == null) mTempRect = new Rect(); 2675 popupBackground.getPadding(mTempRect); 2676 width += mTempRect.left + mTempRect.right; 2677 } 2678 mPopupWindow.setWidth(width); 2679 } 2680 2681 @Override 2682 protected int getTextOffset() { 2683 return mTextView.getSelectionStart(); 2684 } 2685 2686 @Override 2687 protected int getVerticalLocalPosition(int line) { 2688 return mTextView.getLayout().getLineBottom(line); 2689 } 2690 2691 @Override 2692 protected int clipVertically(int positionY) { 2693 final int height = mContentView.getMeasuredHeight(); 2694 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2695 return Math.min(positionY, displayMetrics.heightPixels - height); 2696 } 2697 2698 @Override 2699 public void hide() { 2700 super.hide(); 2701 } 2702 2703 private boolean updateSuggestions() { 2704 Spannable spannable = (Spannable) mTextView.getText(); 2705 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2706 2707 final int nbSpans = suggestionSpans.length; 2708 // Suggestions are shown after a delay: the underlying spans may have been removed 2709 if (nbSpans == 0) return false; 2710 2711 mNumberOfSuggestions = 0; 2712 int spanUnionStart = mTextView.getText().length(); 2713 int spanUnionEnd = 0; 2714 2715 SuggestionSpan misspelledSpan = null; 2716 int underlineColor = 0; 2717 2718 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2719 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2720 final int spanStart = spannable.getSpanStart(suggestionSpan); 2721 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2722 spanUnionStart = Math.min(spanStart, spanUnionStart); 2723 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2724 2725 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2726 misspelledSpan = suggestionSpan; 2727 } 2728 2729 // The first span dictates the background color of the highlighted text 2730 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2731 2732 String[] suggestions = suggestionSpan.getSuggestions(); 2733 int nbSuggestions = suggestions.length; 2734 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2735 String suggestion = suggestions[suggestionIndex]; 2736 2737 boolean suggestionIsDuplicate = false; 2738 for (int i = 0; i < mNumberOfSuggestions; i++) { 2739 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2740 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2741 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2742 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2743 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2744 suggestionIsDuplicate = true; 2745 break; 2746 } 2747 } 2748 } 2749 2750 if (!suggestionIsDuplicate) { 2751 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2752 suggestionInfo.suggestionSpan = suggestionSpan; 2753 suggestionInfo.suggestionIndex = suggestionIndex; 2754 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2755 2756 mNumberOfSuggestions++; 2757 2758 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2759 // Also end outer for loop 2760 spanIndex = nbSpans; 2761 break; 2762 } 2763 } 2764 } 2765 } 2766 2767 for (int i = 0; i < mNumberOfSuggestions; i++) { 2768 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2769 } 2770 2771 // Add "Add to dictionary" item if there is a span with the misspelled flag 2772 if (misspelledSpan != null) { 2773 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2774 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2775 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2776 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2777 suggestionInfo.suggestionSpan = misspelledSpan; 2778 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2779 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2780 getContext().getString(com.android.internal.R.string.addToDictionary)); 2781 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2782 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2783 2784 mNumberOfSuggestions++; 2785 } 2786 } 2787 2788 // Delete item 2789 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2790 suggestionInfo.suggestionSpan = null; 2791 suggestionInfo.suggestionIndex = DELETE_TEXT; 2792 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2793 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2794 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2795 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2796 mNumberOfSuggestions++; 2797 2798 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2799 if (underlineColor == 0) { 2800 // Fallback on the default highlight color when the first span does not provide one 2801 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2802 } else { 2803 final float BACKGROUND_TRANSPARENCY = 0.4f; 2804 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2805 mSuggestionRangeSpan.setBackgroundColor( 2806 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2807 } 2808 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2809 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2810 2811 mSuggestionsAdapter.notifyDataSetChanged(); 2812 return true; 2813 } 2814 2815 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2816 int unionEnd) { 2817 final Spannable text = (Spannable) mTextView.getText(); 2818 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2819 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2820 2821 // Adjust the start/end of the suggestion span 2822 suggestionInfo.suggestionStart = spanStart - unionStart; 2823 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2824 + suggestionInfo.text.length(); 2825 2826 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2827 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2828 2829 // Add the text before and after the span. 2830 final String textAsString = text.toString(); 2831 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2832 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2833 } 2834 2835 @Override 2836 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2837 Editable editable = (Editable) mTextView.getText(); 2838 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2839 2840 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2841 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2842 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2843 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2844 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2845 if (spanUnionEnd < editable.length() && 2846 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2847 (spanUnionStart == 0 || 2848 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2849 spanUnionEnd = spanUnionEnd + 1; 2850 } 2851 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2852 } 2853 hide(); 2854 return; 2855 } 2856 2857 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2858 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2859 if (spanStart < 0 || spanEnd <= spanStart) { 2860 // Span has been removed 2861 hide(); 2862 return; 2863 } 2864 2865 final String originalText = editable.toString().substring(spanStart, spanEnd); 2866 2867 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2868 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2869 intent.putExtra("word", originalText); 2870 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2871 // Put a listener to replace the original text with a word which the user 2872 // modified in a user dictionary dialog. 2873 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2874 mTextView.getContext().startActivity(intent); 2875 // There is no way to know if the word was indeed added. Re-check. 2876 // TODO The ExtractEditText should remove the span in the original text instead 2877 editable.removeSpan(suggestionInfo.suggestionSpan); 2878 Selection.setSelection(editable, spanEnd); 2879 updateSpellCheckSpans(spanStart, spanEnd, false); 2880 } else { 2881 // SuggestionSpans are removed by replace: save them before 2882 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2883 SuggestionSpan.class); 2884 final int length = suggestionSpans.length; 2885 int[] suggestionSpansStarts = new int[length]; 2886 int[] suggestionSpansEnds = new int[length]; 2887 int[] suggestionSpansFlags = new int[length]; 2888 for (int i = 0; i < length; i++) { 2889 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2890 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2891 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2892 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2893 2894 // Remove potential misspelled flags 2895 int suggestionSpanFlags = suggestionSpan.getFlags(); 2896 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2897 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2898 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2899 suggestionSpan.setFlags(suggestionSpanFlags); 2900 } 2901 } 2902 2903 final int suggestionStart = suggestionInfo.suggestionStart; 2904 final int suggestionEnd = suggestionInfo.suggestionEnd; 2905 final String suggestion = suggestionInfo.text.subSequence( 2906 suggestionStart, suggestionEnd).toString(); 2907 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2908 2909 // Notify source IME of the suggestion pick. Do this before 2910 // swaping texts. 2911 suggestionInfo.suggestionSpan.notifySelection( 2912 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 2913 2914 // Swap text content between actual text and Suggestion span 2915 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 2916 suggestions[suggestionInfo.suggestionIndex] = originalText; 2917 2918 // Restore previous SuggestionSpans 2919 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 2920 for (int i = 0; i < length; i++) { 2921 // Only spans that include the modified region make sense after replacement 2922 // Spans partially included in the replaced region are removed, there is no 2923 // way to assign them a valid range after replacement 2924 if (suggestionSpansStarts[i] <= spanStart && 2925 suggestionSpansEnds[i] >= spanEnd) { 2926 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2927 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 2928 } 2929 } 2930 2931 // Move cursor at the end of the replaced word 2932 final int newCursorPosition = spanEnd + lengthDifference; 2933 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2934 } 2935 2936 hide(); 2937 } 2938 } 2939 2940 /** 2941 * An ActionMode Callback class that is used to provide actions while in text selection mode. 2942 * 2943 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 2944 * on which of these this TextView supports. 2945 */ 2946 private class SelectionActionModeCallback extends ActionMode.Callback2 { 2947 private final Path mSelectionPath = new Path(); 2948 private final RectF mSelectionBounds = new RectF(); 2949 2950 private int mSelectionHandleHeight; 2951 private int mInsertionHandleHeight; 2952 2953 public SelectionActionModeCallback() { 2954 SelectionModifierCursorController selectionController = getSelectionController(); 2955 if (selectionController.mStartHandle == null) { 2956 selectionController.initDrawables(); 2957 selectionController.initHandles(); 2958 } 2959 mSelectionHandleHeight = Math.max( 2960 mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight()); 2961 InsertionPointCursorController insertionController = getInsertionController(); 2962 if (insertionController != null) { 2963 insertionController.getHandle(); 2964 mInsertionHandleHeight = mSelectHandleCenter.getMinimumHeight(); 2965 } 2966 } 2967 2968 @Override 2969 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 2970 mode.setTitle(mTextView.getContext().getString( 2971 com.android.internal.R.string.textSelectionCABTitle)); 2972 mode.setSubtitle(null); 2973 mode.setTitleOptionalHint(true); 2974 populateMenuWithItems(menu); 2975 2976 if (mCustomSelectionActionModeCallback != null) { 2977 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 2978 // The custom mode can choose to cancel the action mode 2979 return false; 2980 } 2981 } 2982 2983 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 2984 mTextView.setHasTransientState(true); 2985 return true; 2986 } else { 2987 return false; 2988 } 2989 } 2990 2991 private void populateMenuWithItems(Menu menu) { 2992 final boolean legacy = mTextView.getContext().getApplicationInfo().targetSdkVersion < 2993 Build.VERSION_CODES.LOLLIPOP; 2994 final Context context = !legacy && menu instanceof MenuBuilder ? 2995 ((MenuBuilder) menu).getContext() : 2996 mTextView.getContext(); 2997 final TypedArray styledAttributes = context.obtainStyledAttributes( 2998 com.android.internal.R.styleable.SelectionModeDrawables); 2999 3000 if (mTextView.canCut()) { 3001 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 3002 setIcon(styledAttributes.getResourceId( 3003 R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)). 3004 setAlphabeticShortcut('x'). 3005 setShowAsAction( 3006 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3007 } 3008 3009 if (mTextView.canCopy()) { 3010 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 3011 setIcon(styledAttributes.getResourceId( 3012 R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)). 3013 setAlphabeticShortcut('c'). 3014 setShowAsAction( 3015 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3016 } 3017 3018 if (mTextView.canPaste()) { 3019 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 3020 setIcon(styledAttributes.getResourceId( 3021 R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)). 3022 setAlphabeticShortcut('v'). 3023 setShowAsAction( 3024 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3025 } 3026 3027 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 3028 setIcon(styledAttributes.getResourceId( 3029 R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0)). 3030 setAlphabeticShortcut('a'). 3031 setShowAsAction( 3032 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3033 3034 updateReplaceItem(menu); 3035 3036 styledAttributes.recycle(); 3037 } 3038 3039 @Override 3040 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3041 updateReplaceItem(menu); 3042 3043 if (mCustomSelectionActionModeCallback != null) { 3044 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3045 } 3046 return true; 3047 } 3048 3049 private void updateReplaceItem(Menu menu) { 3050 boolean canReplace = mTextView.isSuggestionsEnabled() && isCursorInsideSuggestionSpan(); 3051 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3052 if (canReplace && !replaceItemExists) { 3053 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 3054 setShowAsAction( 3055 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3056 } else if (!canReplace && replaceItemExists) { 3057 menu.removeItem(TextView.ID_REPLACE); 3058 } 3059 } 3060 3061 @Override 3062 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3063 if (mCustomSelectionActionModeCallback != null && 3064 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3065 return true; 3066 } 3067 if (item.getItemId() == TextView.ID_REPLACE) { 3068 onReplace(); 3069 return true; 3070 } 3071 return mTextView.onTextContextMenuItem(item.getItemId()); 3072 } 3073 3074 @Override 3075 public void onDestroyActionMode(ActionMode mode) { 3076 if (mCustomSelectionActionModeCallback != null) { 3077 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3078 } 3079 3080 /* 3081 * If we're ending this mode because we're detaching from a window, 3082 * we still have selection state to preserve. Don't clear it, we'll 3083 * bring back the selection mode when (if) we get reattached. 3084 */ 3085 if (!mPreserveDetachedSelection) { 3086 Selection.setSelection((Spannable) mTextView.getText(), 3087 mTextView.getSelectionEnd()); 3088 mTextView.setHasTransientState(false); 3089 } 3090 3091 if (mSelectionModifierCursorController != null) { 3092 mSelectionModifierCursorController.hide(); 3093 } 3094 3095 mSelectionActionMode = null; 3096 } 3097 3098 @Override 3099 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3100 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3101 super.onGetContentRect(mode, view, outRect); 3102 return; 3103 } 3104 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3105 // We have a selection. 3106 mSelectionPath.reset(); 3107 mTextView.getLayout().getSelectionPath( 3108 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3109 mSelectionPath.computeBounds(mSelectionBounds, true); 3110 mSelectionBounds.bottom += mSelectionHandleHeight; 3111 } else { 3112 // We have a single cursor. 3113 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3114 float primaryHorizontal = 3115 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3116 mSelectionBounds.set( 3117 primaryHorizontal, 3118 mTextView.getLayout().getLineTop(line), 3119 primaryHorizontal + 1, 3120 mTextView.getLayout().getLineTop(line + 1) + mInsertionHandleHeight); 3121 } 3122 // Take TextView's padding and scroll into account. 3123 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3124 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3125 outRect.set( 3126 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3127 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3128 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3129 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3130 } 3131 } 3132 3133 private void onReplace() { 3134 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3135 stopSelectionActionMode(); 3136 Selection.setSelection((Spannable) mTextView.getText(), middle); 3137 showSuggestions(); 3138 } 3139 3140 /** 3141 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3142 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3143 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3144 */ 3145 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3146 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3147 final int[] mTmpIntOffset = new int[2]; 3148 final Matrix mViewToScreenMatrix = new Matrix(); 3149 3150 @Override 3151 public void updatePosition(int parentPositionX, int parentPositionY, 3152 boolean parentPositionChanged, boolean parentScrolled) { 3153 final InputMethodState ims = mInputMethodState; 3154 if (ims == null || ims.mBatchEditNesting > 0) { 3155 return; 3156 } 3157 final InputMethodManager imm = InputMethodManager.peekInstance(); 3158 if (null == imm) { 3159 return; 3160 } 3161 if (!imm.isActive(mTextView)) { 3162 return; 3163 } 3164 // Skip if the IME has not requested the cursor/anchor position. 3165 if (!imm.isCursorAnchorInfoEnabled()) { 3166 return; 3167 } 3168 Layout layout = mTextView.getLayout(); 3169 if (layout == null) { 3170 return; 3171 } 3172 3173 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3174 builder.reset(); 3175 3176 final int selectionStart = mTextView.getSelectionStart(); 3177 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3178 3179 // Construct transformation matrix from view local coordinates to screen coordinates. 3180 mViewToScreenMatrix.set(mTextView.getMatrix()); 3181 mTextView.getLocationOnScreen(mTmpIntOffset); 3182 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3183 builder.setMatrix(mViewToScreenMatrix); 3184 3185 final float viewportToContentHorizontalOffset = 3186 mTextView.viewportToContentHorizontalOffset(); 3187 final float viewportToContentVerticalOffset = 3188 mTextView.viewportToContentVerticalOffset(); 3189 3190 final CharSequence text = mTextView.getText(); 3191 if (text instanceof Spannable) { 3192 final Spannable sp = (Spannable) text; 3193 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3194 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3195 if (composingTextEnd < composingTextStart) { 3196 final int temp = composingTextEnd; 3197 composingTextEnd = composingTextStart; 3198 composingTextStart = temp; 3199 } 3200 final boolean hasComposingText = 3201 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3202 if (hasComposingText) { 3203 final CharSequence composingText = text.subSequence(composingTextStart, 3204 composingTextEnd); 3205 builder.setComposingText(composingTextStart, composingText); 3206 3207 final int minLine = layout.getLineForOffset(composingTextStart); 3208 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3209 for (int line = minLine; line <= maxLine; ++line) { 3210 final int lineStart = layout.getLineStart(line); 3211 final int lineEnd = layout.getLineEnd(line); 3212 final int offsetStart = Math.max(lineStart, composingTextStart); 3213 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3214 final boolean ltrLine = 3215 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3216 final float[] widths = new float[offsetEnd - offsetStart]; 3217 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3218 final float top = layout.getLineTop(line); 3219 final float bottom = layout.getLineBottom(line); 3220 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3221 final float charWidth = widths[offset - offsetStart]; 3222 final boolean isRtl = layout.isRtlCharAt(offset); 3223 final float primary = layout.getPrimaryHorizontal(offset); 3224 final float secondary = layout.getSecondaryHorizontal(offset); 3225 // TODO: This doesn't work perfectly for text with custom styles and 3226 // TAB chars. 3227 final float left; 3228 final float right; 3229 if (ltrLine) { 3230 if (isRtl) { 3231 left = secondary - charWidth; 3232 right = secondary; 3233 } else { 3234 left = primary; 3235 right = primary + charWidth; 3236 } 3237 } else { 3238 if (!isRtl) { 3239 left = secondary; 3240 right = secondary + charWidth; 3241 } else { 3242 left = primary - charWidth; 3243 right = primary; 3244 } 3245 } 3246 // TODO: Check top-right and bottom-left as well. 3247 final float localLeft = left + viewportToContentHorizontalOffset; 3248 final float localRight = right + viewportToContentHorizontalOffset; 3249 final float localTop = top + viewportToContentVerticalOffset; 3250 final float localBottom = bottom + viewportToContentVerticalOffset; 3251 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3252 final boolean isBottomRightVisible = 3253 isPositionVisible(localRight, localBottom); 3254 int characterBoundsFlags = 0; 3255 if (isTopLeftVisible || isBottomRightVisible) { 3256 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3257 } 3258 if (!isTopLeftVisible || !isBottomRightVisible) { 3259 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3260 } 3261 if (isRtl) { 3262 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3263 } 3264 // Here offset is the index in Java chars. 3265 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3266 localBottom, characterBoundsFlags); 3267 } 3268 } 3269 } 3270 } 3271 3272 // Treat selectionStart as the insertion point. 3273 if (0 <= selectionStart) { 3274 final int offset = selectionStart; 3275 final int line = layout.getLineForOffset(offset); 3276 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3277 + viewportToContentHorizontalOffset; 3278 final float insertionMarkerTop = layout.getLineTop(line) 3279 + viewportToContentVerticalOffset; 3280 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3281 + viewportToContentVerticalOffset; 3282 final float insertionMarkerBottom = layout.getLineBottom(line) 3283 + viewportToContentVerticalOffset; 3284 final boolean isTopVisible = 3285 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3286 final boolean isBottomVisible = 3287 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3288 int insertionMarkerFlags = 0; 3289 if (isTopVisible || isBottomVisible) { 3290 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3291 } 3292 if (!isTopVisible || !isBottomVisible) { 3293 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3294 } 3295 if (layout.isRtlCharAt(offset)) { 3296 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3297 } 3298 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3299 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3300 } 3301 3302 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3303 } 3304 } 3305 3306 private abstract class HandleView extends View implements TextViewPositionListener { 3307 protected Drawable mDrawable; 3308 protected Drawable mDrawableLtr; 3309 protected Drawable mDrawableRtl; 3310 private final PopupWindow mContainer; 3311 // Position with respect to the parent TextView 3312 private int mPositionX, mPositionY; 3313 private boolean mIsDragging; 3314 // Offset from touch position to mPosition 3315 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3316 protected int mHotspotX; 3317 protected int mHorizontalGravity; 3318 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3319 private float mTouchOffsetY; 3320 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3321 private float mIdealVerticalOffset; 3322 // Parent's (TextView) previous position in window 3323 private int mLastParentX, mLastParentY; 3324 // Previous text character offset 3325 private int mPreviousOffset = -1; 3326 // Previous text character offset 3327 private boolean mPositionHasChanged = true; 3328 // Minimum touch target size for handles 3329 private int mMinSize; 3330 // Indicates the line of text that the handle is on. 3331 protected int mPrevLine = -1; 3332 3333 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3334 super(mTextView.getContext()); 3335 mContainer = new PopupWindow(mTextView.getContext(), null, 3336 com.android.internal.R.attr.textSelectHandleWindowStyle); 3337 mContainer.setSplitTouchEnabled(true); 3338 mContainer.setClippingEnabled(false); 3339 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3340 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3341 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3342 mContainer.setContentView(this); 3343 3344 mDrawableLtr = drawableLtr; 3345 mDrawableRtl = drawableRtl; 3346 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3347 com.android.internal.R.dimen.text_handle_min_size); 3348 3349 updateDrawable(); 3350 3351 final int handleHeight = getPreferredHeight(); 3352 mTouchOffsetY = -0.3f * handleHeight; 3353 mIdealVerticalOffset = 0.7f * handleHeight; 3354 } 3355 3356 protected void updateDrawable() { 3357 final int offset = getCurrentCursorOffset(); 3358 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3359 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3360 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3361 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3362 } 3363 3364 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3365 protected abstract int getHorizontalGravity(boolean isRtlRun); 3366 3367 // Touch-up filter: number of previous positions remembered 3368 private static final int HISTORY_SIZE = 5; 3369 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3370 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3371 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3372 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3373 private int mPreviousOffsetIndex = 0; 3374 private int mNumberPreviousOffsets = 0; 3375 3376 private void startTouchUpFilter(int offset) { 3377 mNumberPreviousOffsets = 0; 3378 addPositionToTouchUpFilter(offset); 3379 } 3380 3381 private void addPositionToTouchUpFilter(int offset) { 3382 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3383 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3384 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3385 mNumberPreviousOffsets++; 3386 } 3387 3388 private void filterOnTouchUp() { 3389 final long now = SystemClock.uptimeMillis(); 3390 int i = 0; 3391 int index = mPreviousOffsetIndex; 3392 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3393 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3394 i++; 3395 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3396 } 3397 3398 if (i > 0 && i < iMax && 3399 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3400 positionAtCursorOffset(mPreviousOffsets[index], false); 3401 } 3402 } 3403 3404 public boolean offsetHasBeenChanged() { 3405 return mNumberPreviousOffsets > 1; 3406 } 3407 3408 @Override 3409 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3410 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3411 } 3412 3413 private int getPreferredWidth() { 3414 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3415 } 3416 3417 private int getPreferredHeight() { 3418 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3419 } 3420 3421 public void show() { 3422 if (isShowing()) return; 3423 3424 getPositionListener().addSubscriber(this, true /* local position may change */); 3425 3426 // Make sure the offset is always considered new, even when focusing at same position 3427 mPreviousOffset = -1; 3428 positionAtCursorOffset(getCurrentCursorOffset(), false); 3429 } 3430 3431 protected void dismiss() { 3432 mIsDragging = false; 3433 mContainer.dismiss(); 3434 onDetached(); 3435 } 3436 3437 public void hide() { 3438 dismiss(); 3439 3440 getPositionListener().removeSubscriber(this); 3441 } 3442 3443 public boolean isShowing() { 3444 return mContainer.isShowing(); 3445 } 3446 3447 private boolean isVisible() { 3448 // Always show a dragging handle. 3449 if (mIsDragging) { 3450 return true; 3451 } 3452 3453 if (mTextView.isInBatchEditMode()) { 3454 return false; 3455 } 3456 3457 return isPositionVisible(mPositionX + mHotspotX, mPositionY); 3458 } 3459 3460 public abstract int getCurrentCursorOffset(); 3461 3462 protected abstract void updateSelection(int offset); 3463 3464 public abstract void updatePosition(float x, float y); 3465 3466 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3467 // A HandleView relies on the layout, which may be nulled by external methods 3468 Layout layout = mTextView.getLayout(); 3469 if (layout == null) { 3470 // Will update controllers' state, hiding them and stopping selection mode if needed 3471 prepareCursorControllers(); 3472 return; 3473 } 3474 3475 boolean offsetChanged = offset != mPreviousOffset; 3476 if (offsetChanged || parentScrolled) { 3477 if (offsetChanged) { 3478 updateSelection(offset); 3479 addPositionToTouchUpFilter(offset); 3480 } 3481 final int line = layout.getLineForOffset(offset); 3482 mPrevLine = line; 3483 3484 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3485 getHorizontalOffset() + getCursorOffset()); 3486 mPositionY = layout.getLineBottom(line); 3487 3488 // Take TextView's padding and scroll into account. 3489 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3490 mPositionY += mTextView.viewportToContentVerticalOffset(); 3491 3492 mPreviousOffset = offset; 3493 mPositionHasChanged = true; 3494 } 3495 } 3496 3497 public void updatePosition(int parentPositionX, int parentPositionY, 3498 boolean parentPositionChanged, boolean parentScrolled) { 3499 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3500 if (parentPositionChanged || mPositionHasChanged) { 3501 if (mIsDragging) { 3502 // Update touchToWindow offset in case of parent scrolling while dragging 3503 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3504 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3505 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3506 mLastParentX = parentPositionX; 3507 mLastParentY = parentPositionY; 3508 } 3509 3510 onHandleMoved(); 3511 } 3512 3513 if (isVisible()) { 3514 final int positionX = parentPositionX + mPositionX; 3515 final int positionY = parentPositionY + mPositionY; 3516 if (isShowing()) { 3517 mContainer.update(positionX, positionY, -1, -1); 3518 } else { 3519 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3520 positionX, positionY); 3521 } 3522 } else { 3523 if (isShowing()) { 3524 dismiss(); 3525 } 3526 } 3527 3528 mPositionHasChanged = false; 3529 } 3530 } 3531 3532 public void showAtLocation(int offset) { 3533 // TODO - investigate if there's a better way to show the handles 3534 // after the drag accelerator has occured. 3535 int[] tmpCords = new int[2]; 3536 mTextView.getLocationInWindow(tmpCords); 3537 3538 Layout layout = mTextView.getLayout(); 3539 int posX = tmpCords[0]; 3540 int posY = tmpCords[1]; 3541 3542 final int line = layout.getLineForOffset(offset); 3543 3544 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3545 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3546 int startY = layout.getLineBottom(line); 3547 3548 // Take TextView's padding and scroll into account. 3549 startX += mTextView.viewportToContentHorizontalOffset(); 3550 startY += mTextView.viewportToContentVerticalOffset(); 3551 3552 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3553 startX + posX, startY + posY); 3554 } 3555 3556 @Override 3557 protected void onDraw(Canvas c) { 3558 final int drawWidth = mDrawable.getIntrinsicWidth(); 3559 final int left = getHorizontalOffset(); 3560 3561 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3562 mDrawable.draw(c); 3563 } 3564 3565 private int getHorizontalOffset() { 3566 final int width = getPreferredWidth(); 3567 final int drawWidth = mDrawable.getIntrinsicWidth(); 3568 final int left; 3569 switch (mHorizontalGravity) { 3570 case Gravity.LEFT: 3571 left = 0; 3572 break; 3573 default: 3574 case Gravity.CENTER: 3575 left = (width - drawWidth) / 2; 3576 break; 3577 case Gravity.RIGHT: 3578 left = width - drawWidth; 3579 break; 3580 } 3581 return left; 3582 } 3583 3584 protected int getCursorOffset() { 3585 return 0; 3586 } 3587 3588 @Override 3589 public boolean onTouchEvent(MotionEvent ev) { 3590 switch (ev.getActionMasked()) { 3591 case MotionEvent.ACTION_DOWN: { 3592 startTouchUpFilter(getCurrentCursorOffset()); 3593 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3594 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3595 3596 final PositionListener positionListener = getPositionListener(); 3597 mLastParentX = positionListener.getPositionX(); 3598 mLastParentY = positionListener.getPositionY(); 3599 mIsDragging = true; 3600 break; 3601 } 3602 3603 case MotionEvent.ACTION_MOVE: { 3604 final float rawX = ev.getRawX(); 3605 final float rawY = ev.getRawY(); 3606 3607 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3608 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3609 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3610 float newVerticalOffset; 3611 if (previousVerticalOffset < mIdealVerticalOffset) { 3612 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3613 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3614 } else { 3615 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3616 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3617 } 3618 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3619 3620 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3621 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3622 3623 updatePosition(newPosX, newPosY); 3624 break; 3625 } 3626 3627 case MotionEvent.ACTION_UP: 3628 filterOnTouchUp(); 3629 mIsDragging = false; 3630 break; 3631 3632 case MotionEvent.ACTION_CANCEL: 3633 mIsDragging = false; 3634 break; 3635 } 3636 return true; 3637 } 3638 3639 public boolean isDragging() { 3640 return mIsDragging; 3641 } 3642 3643 void onHandleMoved() {} 3644 3645 public void onDetached() {} 3646 } 3647 3648 private class InsertionHandleView extends HandleView { 3649 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3650 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3651 3652 // Used to detect taps on the insertion handle, which will affect the selection action mode 3653 private float mDownPositionX, mDownPositionY; 3654 private Runnable mHider; 3655 3656 public InsertionHandleView(Drawable drawable) { 3657 super(drawable, drawable); 3658 } 3659 3660 @Override 3661 public void show() { 3662 super.show(); 3663 3664 final long durationSinceCutOrCopy = 3665 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3666 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3667 startSelectionActionModeWithoutSelection(); 3668 } 3669 3670 hideAfterDelay(); 3671 } 3672 3673 private void hideAfterDelay() { 3674 if (mHider == null) { 3675 mHider = new Runnable() { 3676 public void run() { 3677 hide(); 3678 } 3679 }; 3680 } else { 3681 removeHiderCallback(); 3682 } 3683 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3684 } 3685 3686 private void removeHiderCallback() { 3687 if (mHider != null) { 3688 mTextView.removeCallbacks(mHider); 3689 } 3690 } 3691 3692 @Override 3693 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3694 return drawable.getIntrinsicWidth() / 2; 3695 } 3696 3697 @Override 3698 protected int getHorizontalGravity(boolean isRtlRun) { 3699 return Gravity.CENTER_HORIZONTAL; 3700 } 3701 3702 @Override 3703 protected int getCursorOffset() { 3704 int offset = super.getCursorOffset(); 3705 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3706 if (cursor != null) { 3707 cursor.getPadding(mTempRect); 3708 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3709 } 3710 return offset; 3711 } 3712 3713 @Override 3714 public boolean onTouchEvent(MotionEvent ev) { 3715 final boolean result = super.onTouchEvent(ev); 3716 3717 switch (ev.getActionMasked()) { 3718 case MotionEvent.ACTION_DOWN: 3719 mDownPositionX = ev.getRawX(); 3720 mDownPositionY = ev.getRawY(); 3721 break; 3722 3723 case MotionEvent.ACTION_UP: 3724 if (!offsetHasBeenChanged()) { 3725 final float deltaX = mDownPositionX - ev.getRawX(); 3726 final float deltaY = mDownPositionY - ev.getRawY(); 3727 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3728 3729 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3730 mTextView.getContext()); 3731 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3732 3733 if (distanceSquared < touchSlop * touchSlop) { 3734 // Tapping on the handle toggles the selection action mode. 3735 if (mSelectionActionMode != null) { 3736 mSelectionActionMode.finish(); 3737 } else { 3738 startSelectionActionModeWithoutSelection(); 3739 } 3740 } 3741 } 3742 hideAfterDelay(); 3743 break; 3744 3745 case MotionEvent.ACTION_CANCEL: 3746 hideAfterDelay(); 3747 break; 3748 3749 default: 3750 break; 3751 } 3752 3753 return result; 3754 } 3755 3756 @Override 3757 public int getCurrentCursorOffset() { 3758 return mTextView.getSelectionStart(); 3759 } 3760 3761 @Override 3762 public void updateSelection(int offset) { 3763 Selection.setSelection((Spannable) mTextView.getText(), offset); 3764 } 3765 3766 @Override 3767 public void updatePosition(float x, float y) { 3768 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3769 } 3770 3771 @Override 3772 void onHandleMoved() { 3773 super.onHandleMoved(); 3774 removeHiderCallback(); 3775 } 3776 3777 @Override 3778 public void onDetached() { 3779 super.onDetached(); 3780 removeHiderCallback(); 3781 } 3782 } 3783 3784 private class SelectionStartHandleView extends HandleView { 3785 // The previous offset this handle was at. 3786 private int mPrevOffset; 3787 // Indicates whether the cursor is making adjustments within a word. 3788 private boolean mInWord = false; 3789 // Offset to track difference between touch and word boundary. 3790 protected int mTouchWordOffset; 3791 3792 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3793 super(drawableLtr, drawableRtl); 3794 } 3795 3796 @Override 3797 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3798 return isRtlRun ? 0 : drawable.getIntrinsicWidth(); 3799 } 3800 3801 @Override 3802 protected int getHorizontalGravity(boolean isRtlRun) { 3803 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 3804 } 3805 3806 @Override 3807 public int getCurrentCursorOffset() { 3808 return mTextView.getSelectionStart(); 3809 } 3810 3811 @Override 3812 public void updateSelection(int offset) { 3813 Selection.setSelection((Spannable) mTextView.getText(), offset, 3814 mTextView.getSelectionEnd()); 3815 updateDrawable(); 3816 if (mSelectionActionMode != null) { 3817 mSelectionActionMode.invalidate(); 3818 } 3819 } 3820 3821 @Override 3822 public void updatePosition(float x, float y) { 3823 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3824 final int currLine = mTextView.getLineAtCoordinate(y); 3825 3826 // Don't select white space on different lines. 3827 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 3828 3829 boolean positionCursor = false; 3830 int offset = trueOffset; 3831 int end = getWordEnd(offset, true); 3832 int start = getWordStart(offset); 3833 3834 if (offset < mPrevOffset) { 3835 // User is increasing the selection. 3836 if (!mInWord || currLine < mPrevLine) { 3837 // We're not in a word, or we're on a different line so we'll expand by 3838 // word. First ensure the user has at least entered the next word. 3839 int offsetToWord = Math.min((end - start) / 2, 2); 3840 if (offset <= end - offsetToWord || currLine < mPrevLine) { 3841 offset = start; 3842 } else { 3843 offset = mPrevOffset; 3844 } 3845 } 3846 mPrevOffset = offset; 3847 mTouchWordOffset = Math.max(trueOffset - offset, 0); 3848 mInWord = !isStartBoundary(offset); 3849 positionCursor = true; 3850 } else if (offset - mTouchWordOffset > mPrevOffset) { 3851 // User is shrinking the selection. 3852 if (currLine > mPrevLine) { 3853 // We're on a different line, so we'll snap to word boundaries. 3854 offset = end; 3855 } 3856 offset -= mTouchWordOffset; 3857 mPrevOffset = offset; 3858 mInWord = !isEndBoundary(offset); 3859 positionCursor = true; 3860 } 3861 3862 // Handles can not cross and selection is at least one character. 3863 if (positionCursor) { 3864 final int selectionEnd = mTextView.getSelectionEnd(); 3865 if (offset >= selectionEnd) { 3866 // We can't cross the handles so let's just constrain the Y value. 3867 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 3868 if (alteredOffset >= selectionEnd) { 3869 // Can't pass the other drag handle. 3870 offset = Math.max(0, selectionEnd - 1); 3871 } else { 3872 offset = alteredOffset; 3873 } 3874 } 3875 positionAtCursorOffset(offset, false); 3876 } 3877 } 3878 3879 @Override 3880 public boolean onTouchEvent(MotionEvent event) { 3881 boolean superResult = super.onTouchEvent(event); 3882 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 3883 // Reset the touch word offset when the user has lifted their finger. 3884 mTouchWordOffset = 0; 3885 } 3886 return superResult; 3887 } 3888 } 3889 3890 private class SelectionEndHandleView extends HandleView { 3891 // The previous offset this handle was at. 3892 private int mPrevOffset; 3893 // Indicates whether the cursor is making adjustments within a word. 3894 private boolean mInWord = false; 3895 // Offset to track difference between touch and word boundary. 3896 protected int mTouchWordOffset; 3897 3898 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3899 super(drawableLtr, drawableRtl); 3900 } 3901 3902 @Override 3903 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3904 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 3905 } 3906 3907 @Override 3908 protected int getHorizontalGravity(boolean isRtlRun) { 3909 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 3910 } 3911 3912 @Override 3913 public int getCurrentCursorOffset() { 3914 return mTextView.getSelectionEnd(); 3915 } 3916 3917 @Override 3918 public void updateSelection(int offset) { 3919 Selection.setSelection((Spannable) mTextView.getText(), 3920 mTextView.getSelectionStart(), offset); 3921 if (mSelectionActionMode != null) { 3922 mSelectionActionMode.invalidate(); 3923 } 3924 updateDrawable(); 3925 } 3926 3927 @Override 3928 public void updatePosition(float x, float y) { 3929 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3930 final int currLine = mTextView.getLineAtCoordinate(y); 3931 3932 // Don't select white space on different lines. 3933 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 3934 3935 int offset = trueOffset; 3936 boolean positionCursor = false; 3937 3938 int end = getWordEnd(offset, true); 3939 int start = getWordStart(offset); 3940 3941 if (offset > mPrevOffset) { 3942 // User is increasing the selection. 3943 if (!mInWord || currLine > mPrevLine) { 3944 // We're not in a word, or we're on a different line so we'll expand by 3945 // word. First ensure the user has at least entered the next word. 3946 int midPoint = Math.min((end - start) / 2, 2); 3947 if (offset >= start + midPoint || currLine > mPrevLine) { 3948 offset = end; 3949 } else { 3950 offset = mPrevOffset; 3951 } 3952 } 3953 mPrevOffset = offset; 3954 mTouchWordOffset = Math.max(offset - trueOffset, 0); 3955 mInWord = !isEndBoundary(offset); 3956 positionCursor = true; 3957 } else if (offset + mTouchWordOffset < mPrevOffset) { 3958 // User is shrinking the selection. 3959 if (currLine > mPrevLine) { 3960 // We're on a different line, so we'll snap to word boundaries. 3961 offset = getWordStart(offset); 3962 } 3963 offset += mTouchWordOffset; 3964 mPrevOffset = offset; 3965 positionCursor = true; 3966 mInWord = !isStartBoundary(offset); 3967 } 3968 3969 if (positionCursor) { 3970 final int selectionStart = mTextView.getSelectionStart(); 3971 if (offset <= selectionStart) { 3972 // We can't cross the handles so let's just constrain the Y value. 3973 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 3974 int length = mTextView.getText().length(); 3975 if (alteredOffset <= selectionStart) { 3976 // Can't pass the other drag handle. 3977 offset = Math.min(selectionStart + 1, length); 3978 } else { 3979 offset = Math.min(alteredOffset, length); 3980 } 3981 } 3982 positionAtCursorOffset(offset, false); 3983 } 3984 } 3985 3986 @Override 3987 public boolean onTouchEvent(MotionEvent event) { 3988 boolean superResult = super.onTouchEvent(event); 3989 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 3990 // Reset the touch word offset when the user has lifted their finger. 3991 mTouchWordOffset = 0; 3992 } 3993 return superResult; 3994 } 3995 } 3996 3997 /** 3998 * Checks whether selection is happening on a different line than previous and 3999 * if that line only contains whitespace up to the touch location. 4000 * 4001 * @param prevLine The previous line the selection was on. 4002 * @param currLine The current line being selected. 4003 * @param offset The offset in the text where the touch occurred. 4004 * @return Whether or not it was just a white space line being selected. 4005 */ 4006 private boolean isWhitespaceLine(int prevLine, int currLine, int offset) { 4007 if (prevLine == currLine) { 4008 // Same line; don't care. 4009 return false; 4010 } 4011 CharSequence text = mTextView.getText(); 4012 if (offset == text.length()) { 4013 // No character at the last position. 4014 return false; 4015 } 4016 int lineEndOffset = mTextView.getLayout().getLineEnd(currLine); 4017 for (int cp, i = offset; i < lineEndOffset; i += Character.charCount(cp)) { 4018 cp = Character.codePointAt(text, i); 4019 if (!Character.isSpaceChar(cp) && !Character.isWhitespace(cp)) { 4020 // There are non white space chars on the line. 4021 return false; 4022 } 4023 } 4024 return true; 4025 } 4026 4027 /** 4028 * A CursorController instance can be used to control a cursor in the text. 4029 */ 4030 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4031 /** 4032 * Makes the cursor controller visible on screen. 4033 * See also {@link #hide()}. 4034 */ 4035 public void show(); 4036 4037 /** 4038 * Hide the cursor controller from screen. 4039 * See also {@link #show()}. 4040 */ 4041 public void hide(); 4042 4043 /** 4044 * Called when the view is detached from window. Perform house keeping task, such as 4045 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4046 * preventing the activity from being recycled. 4047 */ 4048 public void onDetached(); 4049 } 4050 4051 private class InsertionPointCursorController implements CursorController { 4052 private InsertionHandleView mHandle; 4053 4054 public void show() { 4055 getHandle().show(); 4056 } 4057 4058 public void hide() { 4059 if (mHandle != null) { 4060 mHandle.hide(); 4061 } 4062 } 4063 4064 public void onTouchModeChanged(boolean isInTouchMode) { 4065 if (!isInTouchMode) { 4066 hide(); 4067 } 4068 } 4069 4070 private InsertionHandleView getHandle() { 4071 if (mSelectHandleCenter == null) { 4072 mSelectHandleCenter = mTextView.getContext().getDrawable( 4073 mTextView.mTextSelectHandleRes); 4074 } 4075 if (mHandle == null) { 4076 mHandle = new InsertionHandleView(mSelectHandleCenter); 4077 } 4078 return mHandle; 4079 } 4080 4081 @Override 4082 public void onDetached() { 4083 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4084 observer.removeOnTouchModeChangeListener(this); 4085 4086 if (mHandle != null) mHandle.onDetached(); 4087 } 4088 } 4089 4090 class SelectionModifierCursorController implements CursorController { 4091 // The cursor controller handles, lazily created when shown. 4092 private SelectionStartHandleView mStartHandle; 4093 private SelectionEndHandleView mEndHandle; 4094 // The offsets of that last touch down event. Remembered to start selection there. 4095 private int mMinTouchOffset, mMaxTouchOffset; 4096 4097 // Double tap detection 4098 private long mPreviousTapUpTime = 0; 4099 private float mDownPositionX, mDownPositionY; 4100 private boolean mGestureStayedInTapRegion; 4101 4102 // Where the user first starts the drag motion. 4103 private int mStartOffset = -1; 4104 // Indicates whether the user is selecting text and using the drag accelerator. 4105 private boolean mDragAcceleratorActive; 4106 // Indicates the line of text the drag accelerator is on. 4107 private int mPrevLine = -1; 4108 4109 SelectionModifierCursorController() { 4110 resetTouchOffsets(); 4111 } 4112 4113 public void show() { 4114 if (mTextView.isInBatchEditMode()) { 4115 return; 4116 } 4117 initDrawables(); 4118 initHandles(); 4119 hideInsertionPointCursorController(); 4120 } 4121 4122 private void initDrawables() { 4123 if (mSelectHandleLeft == null) { 4124 mSelectHandleLeft = mTextView.getContext().getDrawable( 4125 mTextView.mTextSelectHandleLeftRes); 4126 } 4127 if (mSelectHandleRight == null) { 4128 mSelectHandleRight = mTextView.getContext().getDrawable( 4129 mTextView.mTextSelectHandleRightRes); 4130 } 4131 } 4132 4133 private void initHandles() { 4134 // Lazy object creation has to be done before updatePosition() is called. 4135 if (mStartHandle == null) { 4136 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4137 } 4138 if (mEndHandle == null) { 4139 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4140 } 4141 4142 mStartHandle.show(); 4143 mEndHandle.show(); 4144 4145 hideInsertionPointCursorController(); 4146 } 4147 4148 public void hide() { 4149 if (mStartHandle != null) mStartHandle.hide(); 4150 if (mEndHandle != null) mEndHandle.hide(); 4151 } 4152 4153 public void enterDrag() { 4154 // Just need to init the handles / hide insertion cursor. 4155 show(); 4156 mDragAcceleratorActive = true; 4157 // Start location of selection. 4158 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4159 mLastDownPositionY); 4160 // Don't show the handles until user has lifted finger. 4161 hide(); 4162 4163 // This stops scrolling parents from intercepting the touch event, allowing 4164 // the user to continue dragging across the screen to select text; TextView will 4165 // scroll as necessary. 4166 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4167 } 4168 4169 public void onTouchEvent(MotionEvent event) { 4170 // This is done even when the View does not have focus, so that long presses can start 4171 // selection and tap can move cursor from this tap position. 4172 switch (event.getActionMasked()) { 4173 case MotionEvent.ACTION_DOWN: 4174 final float x = event.getX(); 4175 final float y = event.getY(); 4176 4177 // Remember finger down position, to be able to start selection from there. 4178 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4179 4180 // Double tap detection 4181 if (mGestureStayedInTapRegion) { 4182 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 4183 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 4184 final float deltaX = x - mDownPositionX; 4185 final float deltaY = y - mDownPositionY; 4186 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4187 4188 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4189 mTextView.getContext()); 4190 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4191 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4192 4193 if (stayedInArea && isPositionOnText(x, y)) { 4194 startSelectionActionModeWithSelection(); 4195 mDiscardNextActionUp = true; 4196 } 4197 } 4198 } 4199 4200 // New selection, reset line. 4201 mPrevLine = mTextView.getLineAtCoordinate(y); 4202 mDownPositionX = x; 4203 mDownPositionY = y; 4204 mGestureStayedInTapRegion = true; 4205 break; 4206 4207 case MotionEvent.ACTION_POINTER_DOWN: 4208 case MotionEvent.ACTION_POINTER_UP: 4209 // Handle multi-point gestures. Keep min and max offset positions. 4210 // Only activated for devices that correctly handle multi-touch. 4211 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4212 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4213 updateMinAndMaxOffsets(event); 4214 } 4215 break; 4216 4217 case MotionEvent.ACTION_MOVE: 4218 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4219 mTextView.getContext()); 4220 4221 if (mGestureStayedInTapRegion) { 4222 final float deltaX = event.getX() - mDownPositionX; 4223 final float deltaY = event.getY() - mDownPositionY; 4224 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4225 4226 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4227 4228 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4229 mGestureStayedInTapRegion = false; 4230 } 4231 } 4232 4233 if (mStartHandle != null && mStartHandle.isShowing()) { 4234 // Don't do the drag if the handles are showing already. 4235 break; 4236 } 4237 4238 if (mStartOffset != -1) { 4239 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4240 event.getY()); 4241 int offset = rawOffset; 4242 4243 // We don't start "dragging" until the user is past the initial word that 4244 // gets selected on long press. 4245 int firstWordStart = getWordStart(mStartOffset); 4246 int firstWordEnd = getWordEnd(mStartOffset, false); 4247 if (offset > firstWordEnd || offset < firstWordStart) { 4248 4249 // Basically the goal in the below code is to have the highlight be 4250 // offset so that your finger isn't covering the end point. 4251 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4252 float mx = event.getX(); 4253 float my = event.getY(); 4254 if (mx > fingerOffset) mx -= fingerOffset; 4255 if (my > fingerOffset) my -= fingerOffset; 4256 offset = mTextView.getOffsetForPosition(mx, my); 4257 4258 int currLine = mTextView.getLineAtCoordinate(my); 4259 4260 // Don't select white space on different lines. 4261 if (isWhitespaceLine(mPrevLine, currLine, offset)) return; 4262 4263 mPrevLine = currLine; 4264 4265 // Perform the check for closeness at edge of view, if we're very close 4266 // don't adjust the offset to be in front of the finger - otherwise the 4267 // user can't select words at the edge. 4268 if (mTextView.getWidth() - fingerOffset > mx) { 4269 // We're going by word, so we need to make sure that the offset 4270 // that we get is within this, so we'll get the previous boundary. 4271 final WordIterator wordIterator = getWordIteratorWithText(); 4272 4273 final int precedingOffset = wordIterator.preceding(offset); 4274 if (mStartOffset < offset) { 4275 // Expanding with bottom handle, in this case the selection end 4276 // is before the finger. 4277 offset = Math.max(precedingOffset - 1, 0); 4278 } else { 4279 // Expand with the start handle, in this case the selection 4280 // start is before the finger. 4281 if (precedingOffset == WordIterator.DONE) { 4282 offset = 0; 4283 } else { 4284 offset = wordIterator.preceding(precedingOffset); 4285 } 4286 } 4287 } 4288 if (offset == WordIterator.DONE) 4289 offset = rawOffset; 4290 4291 // Need to adjust start offset based on direction of movement. 4292 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4293 : getWordEnd(mStartOffset, true); 4294 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4295 offset); 4296 } 4297 } 4298 break; 4299 4300 case MotionEvent.ACTION_UP: 4301 mPreviousTapUpTime = SystemClock.uptimeMillis(); 4302 if (mDragAcceleratorActive) { 4303 // No longer dragging to select text, let the parent intercept events. 4304 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4305 4306 show(); 4307 int startOffset = mTextView.getSelectionStart(); 4308 int endOffset = mTextView.getSelectionEnd(); 4309 4310 // Since we don't let drag handles pass once they're visible, we need to 4311 // make sure the start / end locations are correct because the user *can* 4312 // switch directions during the initial drag. 4313 if (endOffset < startOffset) { 4314 int tmp = endOffset; 4315 endOffset = startOffset; 4316 startOffset = tmp; 4317 4318 // Also update the selection with the right offsets in this case. 4319 Selection.setSelection((Spannable) mTextView.getText(), 4320 startOffset, endOffset); 4321 } 4322 4323 // Need to do this to display the handles. 4324 mStartHandle.showAtLocation(startOffset); 4325 mEndHandle.showAtLocation(endOffset); 4326 4327 // No longer the first dragging motion, reset. 4328 mDragAcceleratorActive = false; 4329 mStartOffset = -1; 4330 } 4331 break; 4332 } 4333 } 4334 4335 /** 4336 * @param event 4337 */ 4338 private void updateMinAndMaxOffsets(MotionEvent event) { 4339 int pointerCount = event.getPointerCount(); 4340 for (int index = 0; index < pointerCount; index++) { 4341 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4342 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4343 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4344 } 4345 } 4346 4347 public int getMinTouchOffset() { 4348 return mMinTouchOffset; 4349 } 4350 4351 public int getMaxTouchOffset() { 4352 return mMaxTouchOffset; 4353 } 4354 4355 public void resetTouchOffsets() { 4356 mMinTouchOffset = mMaxTouchOffset = -1; 4357 mStartOffset = -1; 4358 mDragAcceleratorActive = false; 4359 } 4360 4361 /** 4362 * @return true iff this controller is currently used to move the selection start. 4363 */ 4364 public boolean isSelectionStartDragged() { 4365 return mStartHandle != null && mStartHandle.isDragging(); 4366 } 4367 4368 /** 4369 * @return true if the user is selecting text using the drag accelerator. 4370 */ 4371 public boolean isDragAcceleratorActive() { 4372 return mDragAcceleratorActive; 4373 } 4374 4375 public void onTouchModeChanged(boolean isInTouchMode) { 4376 if (!isInTouchMode) { 4377 hide(); 4378 } 4379 } 4380 4381 @Override 4382 public void onDetached() { 4383 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4384 observer.removeOnTouchModeChangeListener(this); 4385 4386 if (mStartHandle != null) mStartHandle.onDetached(); 4387 if (mEndHandle != null) mEndHandle.onDetached(); 4388 } 4389 } 4390 4391 private class CorrectionHighlighter { 4392 private final Path mPath = new Path(); 4393 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4394 private int mStart, mEnd; 4395 private long mFadingStartTime; 4396 private RectF mTempRectF; 4397 private final static int FADE_OUT_DURATION = 400; 4398 4399 public CorrectionHighlighter() { 4400 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4401 applicationScale); 4402 mPaint.setStyle(Paint.Style.FILL); 4403 } 4404 4405 public void highlight(CorrectionInfo info) { 4406 mStart = info.getOffset(); 4407 mEnd = mStart + info.getNewText().length(); 4408 mFadingStartTime = SystemClock.uptimeMillis(); 4409 4410 if (mStart < 0 || mEnd < 0) { 4411 stopAnimation(); 4412 } 4413 } 4414 4415 public void draw(Canvas canvas, int cursorOffsetVertical) { 4416 if (updatePath() && updatePaint()) { 4417 if (cursorOffsetVertical != 0) { 4418 canvas.translate(0, cursorOffsetVertical); 4419 } 4420 4421 canvas.drawPath(mPath, mPaint); 4422 4423 if (cursorOffsetVertical != 0) { 4424 canvas.translate(0, -cursorOffsetVertical); 4425 } 4426 invalidate(true); // TODO invalidate cursor region only 4427 } else { 4428 stopAnimation(); 4429 invalidate(false); // TODO invalidate cursor region only 4430 } 4431 } 4432 4433 private boolean updatePaint() { 4434 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4435 if (duration > FADE_OUT_DURATION) return false; 4436 4437 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4438 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4439 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4440 ((int) (highlightColorAlpha * coef) << 24); 4441 mPaint.setColor(color); 4442 return true; 4443 } 4444 4445 private boolean updatePath() { 4446 final Layout layout = mTextView.getLayout(); 4447 if (layout == null) return false; 4448 4449 // Update in case text is edited while the animation is run 4450 final int length = mTextView.getText().length(); 4451 int start = Math.min(length, mStart); 4452 int end = Math.min(length, mEnd); 4453 4454 mPath.reset(); 4455 layout.getSelectionPath(start, end, mPath); 4456 return true; 4457 } 4458 4459 private void invalidate(boolean delayed) { 4460 if (mTextView.getLayout() == null) return; 4461 4462 if (mTempRectF == null) mTempRectF = new RectF(); 4463 mPath.computeBounds(mTempRectF, false); 4464 4465 int left = mTextView.getCompoundPaddingLeft(); 4466 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4467 4468 if (delayed) { 4469 mTextView.postInvalidateOnAnimation( 4470 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4471 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4472 } else { 4473 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4474 (int) mTempRectF.right, (int) mTempRectF.bottom); 4475 } 4476 } 4477 4478 private void stopAnimation() { 4479 Editor.this.mCorrectionHighlighter = null; 4480 } 4481 } 4482 4483 private static class ErrorPopup extends PopupWindow { 4484 private boolean mAbove = false; 4485 private final TextView mView; 4486 private int mPopupInlineErrorBackgroundId = 0; 4487 private int mPopupInlineErrorAboveBackgroundId = 0; 4488 4489 ErrorPopup(TextView v, int width, int height) { 4490 super(v, width, height); 4491 mView = v; 4492 // Make sure the TextView has a background set as it will be used the first time it is 4493 // shown and positioned. Initialized with below background, which should have 4494 // dimensions identical to the above version for this to work (and is more likely). 4495 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4496 com.android.internal.R.styleable.Theme_errorMessageBackground); 4497 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4498 } 4499 4500 void fixDirection(boolean above) { 4501 mAbove = above; 4502 4503 if (above) { 4504 mPopupInlineErrorAboveBackgroundId = 4505 getResourceId(mPopupInlineErrorAboveBackgroundId, 4506 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4507 } else { 4508 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4509 com.android.internal.R.styleable.Theme_errorMessageBackground); 4510 } 4511 4512 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4513 mPopupInlineErrorBackgroundId); 4514 } 4515 4516 private int getResourceId(int currentId, int index) { 4517 if (currentId == 0) { 4518 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4519 R.styleable.Theme); 4520 currentId = styledAttributes.getResourceId(index, 0); 4521 styledAttributes.recycle(); 4522 } 4523 return currentId; 4524 } 4525 4526 @Override 4527 public void update(int x, int y, int w, int h, boolean force) { 4528 super.update(x, y, w, h, force); 4529 4530 boolean above = isAboveAnchor(); 4531 if (above != mAbove) { 4532 fixDirection(above); 4533 } 4534 } 4535 } 4536 4537 static class InputContentType { 4538 int imeOptions = EditorInfo.IME_NULL; 4539 String privateImeOptions; 4540 CharSequence imeActionLabel; 4541 int imeActionId; 4542 Bundle extras; 4543 OnEditorActionListener onEditorActionListener; 4544 boolean enterDown; 4545 } 4546 4547 static class InputMethodState { 4548 Rect mCursorRectInWindow = new Rect(); 4549 float[] mTmpOffset = new float[2]; 4550 ExtractedTextRequest mExtractedTextRequest; 4551 final ExtractedText mExtractedText = new ExtractedText(); 4552 int mBatchEditNesting; 4553 boolean mCursorChanged; 4554 boolean mSelectionModeChanged; 4555 boolean mContentChanged; 4556 int mChangedStart, mChangedEnd, mChangedDelta; 4557 } 4558 4559 /** 4560 * @return True iff (start, end) is a valid range within the text. 4561 */ 4562 private static boolean isValidRange(CharSequence text, int start, int end) { 4563 return 0 <= start && start <= end && end <= text.length(); 4564 } 4565 4566 /** 4567 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4568 * text being typed (and hence always returns null from the filter() method). 4569 */ 4570 public static class UndoInputFilter implements InputFilter { 4571 private final Editor mEditor; 4572 4573 // Whether the current filter pass is directly caused by an end-user text edit. 4574 private boolean mIsUserEdit; 4575 4576 // Whether the text field is handling an IME composition. Must be parceled in case the user 4577 // rotates the screen during composition. 4578 private boolean mHasComposition; 4579 4580 public UndoInputFilter(Editor editor) { 4581 mEditor = editor; 4582 } 4583 4584 public void saveInstanceState(Parcel parcel) { 4585 parcel.writeInt(mIsUserEdit ? 1 : 0); 4586 parcel.writeInt(mHasComposition ? 1 : 0); 4587 } 4588 4589 public void restoreInstanceState(Parcel parcel) { 4590 mIsUserEdit = parcel.readInt() != 0; 4591 mHasComposition = parcel.readInt() != 0; 4592 } 4593 4594 /** 4595 * Signals that a user-triggered edit is starting. 4596 */ 4597 public void beginBatchEdit() { 4598 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4599 mIsUserEdit = true; 4600 } 4601 4602 public void endBatchEdit() { 4603 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4604 mIsUserEdit = false; 4605 } 4606 4607 @Override 4608 public CharSequence filter(CharSequence source, int start, int end, 4609 Spanned dest, int dstart, int dend) { 4610 if (DEBUG_UNDO) { 4611 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4612 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4613 } 4614 4615 // Check to see if this edit should be tracked for undo. 4616 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4617 return null; 4618 } 4619 4620 // Check for and handle IME composition edits. 4621 if (handleCompositionEdit(source, start, end, dstart)) { 4622 return null; 4623 } 4624 4625 // Handle keyboard edits. 4626 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4627 return null; 4628 } 4629 4630 /** 4631 * Returns true iff the edit was handled, either because it should be ignored or because 4632 * this function created an undo operation for it. 4633 */ 4634 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4635 // Ignore edits while the user is composing. 4636 if (isComposition(source)) { 4637 mHasComposition = true; 4638 return true; 4639 } 4640 final boolean hadComposition = mHasComposition; 4641 mHasComposition = false; 4642 4643 // Check for the transition out of the composing state. 4644 if (hadComposition) { 4645 // If there was no text the user canceled composition. Ignore the edit. 4646 if (start == end) { 4647 return true; 4648 } 4649 4650 // Otherwise the user inserted the composition. 4651 String newText = TextUtils.substring(source, start, end); 4652 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4653 recordEdit(edit, false /* forceMerge */); 4654 return true; 4655 } 4656 4657 // This was neither a composition event nor a transition out of composing. 4658 return false; 4659 } 4660 4661 private void handleKeyboardEdit(CharSequence source, int start, int end, 4662 Spanned dest, int dstart, int dend) { 4663 // An application may install a TextWatcher to provide additional modifications after 4664 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4665 // string). This results in multiple filter() calls for what the user considers to be 4666 // a single operation. Always undo the whole set of changes in one step. 4667 final boolean forceMerge = isInTextWatcher(); 4668 4669 // Build a new operation with all the information from this edit. 4670 String newText = TextUtils.substring(source, start, end); 4671 String oldText = TextUtils.substring(dest, dstart, dend); 4672 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4673 recordEdit(edit, forceMerge); 4674 } 4675 4676 /** 4677 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4678 * If forceMerge is true then the new edit is always merged. 4679 */ 4680 private void recordEdit(EditOperation edit, boolean forceMerge) { 4681 // Fetch the last edit operation and attempt to merge in the new edit. 4682 final UndoManager um = mEditor.mUndoManager; 4683 um.beginUpdate("Edit text"); 4684 EditOperation lastEdit = um.getLastOperation( 4685 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4686 if (lastEdit == null) { 4687 // Add this as the first edit. 4688 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4689 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4690 } else if (forceMerge) { 4691 // Forced merges take priority because they could be the result of a non-user-edit 4692 // change and this case should not create a new undo operation. 4693 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4694 lastEdit.forceMergeWith(edit); 4695 } else if (!mIsUserEdit) { 4696 // An application directly modified the Editable outside of a text edit. Treat this 4697 // as a new change and don't attempt to merge. 4698 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4699 um.commitState(mEditor.mUndoOwner); 4700 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4701 } else if (lastEdit.mergeWith(edit)) { 4702 // Merge succeeded, nothing else to do. 4703 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4704 } else { 4705 // Could not merge with the last edit, so commit the last edit and add this edit. 4706 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4707 um.commitState(mEditor.mUndoOwner); 4708 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4709 } 4710 um.endUpdate(); 4711 } 4712 4713 private boolean canUndoEdit(CharSequence source, int start, int end, 4714 Spanned dest, int dstart, int dend) { 4715 if (!mEditor.mAllowUndo) { 4716 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4717 return false; 4718 } 4719 4720 if (mEditor.mUndoManager.isInUndo()) { 4721 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4722 return false; 4723 } 4724 4725 // Text filters run before input operations are applied. However, some input operations 4726 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4727 // attempt to undo invalid operations. 4728 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4729 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4730 return false; 4731 } 4732 4733 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4734 // on an input field. Skip no-op changes. 4735 if (start == end && dstart == dend) { 4736 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4737 return false; 4738 } 4739 4740 return true; 4741 } 4742 4743 private boolean isComposition(CharSequence source) { 4744 if (!(source instanceof Spannable)) { 4745 return false; 4746 } 4747 // This is a composition edit if the source has a non-zero-length composing span. 4748 Spannable text = (Spannable) source; 4749 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4750 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4751 return composeBegin < composeEnd; 4752 } 4753 4754 private boolean isInTextWatcher() { 4755 CharSequence text = mEditor.mTextView.getText(); 4756 return (text instanceof SpannableStringBuilder) 4757 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4758 } 4759 } 4760 4761 /** 4762 * An operation to undo a single "edit" to a text view. 4763 */ 4764 public static class EditOperation extends UndoOperation<Editor> { 4765 private static final int TYPE_INSERT = 0; 4766 private static final int TYPE_DELETE = 1; 4767 private static final int TYPE_REPLACE = 2; 4768 4769 private int mType; 4770 private String mOldText; 4771 private int mOldTextStart; 4772 private String mNewText; 4773 private int mNewTextStart; 4774 4775 private int mOldCursorPos; 4776 private int mNewCursorPos; 4777 4778 /** 4779 * Constructs an edit operation from a text input operation on editor that replaces the 4780 * oldText starting at dstart with newText. 4781 */ 4782 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 4783 super(editor.mUndoOwner); 4784 mOldText = oldText; 4785 mNewText = newText; 4786 4787 // Determine the type of the edit and store where it occurred. Avoid storing 4788 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4789 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4790 // outside the bounds of the final text). 4791 if (mNewText.length() > 0 && mOldText.length() == 0) { 4792 mType = TYPE_INSERT; 4793 mNewTextStart = dstart; 4794 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4795 mType = TYPE_DELETE; 4796 mOldTextStart = dstart; 4797 } else { 4798 mType = TYPE_REPLACE; 4799 mOldTextStart = mNewTextStart = dstart; 4800 } 4801 4802 // Store cursor data. 4803 mOldCursorPos = editor.mTextView.getSelectionStart(); 4804 mNewCursorPos = dstart + mNewText.length(); 4805 } 4806 4807 public EditOperation(Parcel src, ClassLoader loader) { 4808 super(src, loader); 4809 mType = src.readInt(); 4810 mOldText = src.readString(); 4811 mOldTextStart = src.readInt(); 4812 mNewText = src.readString(); 4813 mNewTextStart = src.readInt(); 4814 mOldCursorPos = src.readInt(); 4815 mNewCursorPos = src.readInt(); 4816 } 4817 4818 @Override 4819 public void writeToParcel(Parcel dest, int flags) { 4820 dest.writeInt(mType); 4821 dest.writeString(mOldText); 4822 dest.writeInt(mOldTextStart); 4823 dest.writeString(mNewText); 4824 dest.writeInt(mNewTextStart); 4825 dest.writeInt(mOldCursorPos); 4826 dest.writeInt(mNewCursorPos); 4827 } 4828 4829 private int getNewTextEnd() { 4830 return mNewTextStart + mNewText.length(); 4831 } 4832 4833 private int getOldTextEnd() { 4834 return mOldTextStart + mOldText.length(); 4835 } 4836 4837 @Override 4838 public void commit() { 4839 } 4840 4841 @Override 4842 public void undo() { 4843 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4844 // Remove the new text and insert the old. 4845 Editor editor = getOwnerData(); 4846 Editable text = (Editable) editor.mTextView.getText(); 4847 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4848 mOldCursorPos); 4849 } 4850 4851 @Override 4852 public void redo() { 4853 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4854 // Remove the old text and insert the new. 4855 Editor editor = getOwnerData(); 4856 Editable text = (Editable) editor.mTextView.getText(); 4857 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4858 mNewCursorPos); 4859 } 4860 4861 /** 4862 * Attempts to merge this existing operation with a new edit. 4863 * @param edit The new edit operation. 4864 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4865 * object unchanged. 4866 */ 4867 private boolean mergeWith(EditOperation edit) { 4868 if (DEBUG_UNDO) { 4869 Log.d(TAG, "mergeWith old " + this); 4870 Log.d(TAG, "mergeWith new " + edit); 4871 } 4872 switch (mType) { 4873 case TYPE_INSERT: 4874 return mergeInsertWith(edit); 4875 case TYPE_DELETE: 4876 return mergeDeleteWith(edit); 4877 case TYPE_REPLACE: 4878 return mergeReplaceWith(edit); 4879 default: 4880 return false; 4881 } 4882 } 4883 4884 private boolean mergeInsertWith(EditOperation edit) { 4885 // Only merge continuous insertions. 4886 if (edit.mType != TYPE_INSERT) { 4887 return false; 4888 } 4889 // Only merge insertions that are contiguous. 4890 if (getNewTextEnd() != edit.mNewTextStart) { 4891 return false; 4892 } 4893 mNewText += edit.mNewText; 4894 mNewCursorPos = edit.mNewCursorPos; 4895 return true; 4896 } 4897 4898 // TODO: Support forward delete. 4899 private boolean mergeDeleteWith(EditOperation edit) { 4900 // Only merge continuous deletes. 4901 if (edit.mType != TYPE_DELETE) { 4902 return false; 4903 } 4904 // Only merge deletions that are contiguous. 4905 if (mOldTextStart != edit.getOldTextEnd()) { 4906 return false; 4907 } 4908 mOldTextStart = edit.mOldTextStart; 4909 mOldText = edit.mOldText + mOldText; 4910 mNewCursorPos = edit.mNewCursorPos; 4911 return true; 4912 } 4913 4914 private boolean mergeReplaceWith(EditOperation edit) { 4915 // Replacements can merge only with adjacent inserts. 4916 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 4917 return false; 4918 } 4919 mOldText += edit.mOldText; 4920 mNewText += edit.mNewText; 4921 mNewCursorPos = edit.mNewCursorPos; 4922 return true; 4923 } 4924 4925 /** 4926 * Forcibly creates a single merged edit operation by simulating the entire text 4927 * contents being replaced. 4928 */ 4929 public void forceMergeWith(EditOperation edit) { 4930 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 4931 Editor editor = getOwnerData(); 4932 4933 // Copy the text of the current field. 4934 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 4935 // but would require two parallel implementations of modifyText() because Editable and 4936 // StringBuilder do not share an interface for replace/delete/insert. 4937 Editable editable = (Editable) editor.mTextView.getText(); 4938 Editable originalText = new SpannableStringBuilder(editable.toString()); 4939 4940 // Roll back the last operation. 4941 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4942 mOldCursorPos); 4943 4944 // Clone the text again and apply the new operation. 4945 Editable finalText = new SpannableStringBuilder(editable.toString()); 4946 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 4947 edit.mNewTextStart, edit.mNewCursorPos); 4948 4949 // Convert this operation into a non-mergeable replacement of the entire string. 4950 mType = TYPE_REPLACE; 4951 mNewText = finalText.toString(); 4952 mNewTextStart = 0; 4953 mOldText = originalText.toString(); 4954 mOldTextStart = 0; 4955 mNewCursorPos = edit.mNewCursorPos; 4956 // mOldCursorPos is unchanged. 4957 } 4958 4959 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 4960 CharSequence newText, int newTextInsertAt, int newCursorPos) { 4961 // Apply the edit if it is still valid. 4962 if (isValidRange(text, deleteFrom, deleteTo) && 4963 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 4964 if (deleteFrom != deleteTo) { 4965 text.delete(deleteFrom, deleteTo); 4966 } 4967 if (newText.length() != 0) { 4968 text.insert(newTextInsertAt, newText); 4969 } 4970 } 4971 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 4972 // don't explicitly set it and rely on SpannableStringBuilder to position it. 4973 // TODO: Select all the text that was undone. 4974 if (0 <= newCursorPos && newCursorPos <= text.length()) { 4975 Selection.setSelection(text, newCursorPos); 4976 } 4977 } 4978 4979 private String getTypeString() { 4980 switch (mType) { 4981 case TYPE_INSERT: 4982 return "insert"; 4983 case TYPE_DELETE: 4984 return "delete"; 4985 case TYPE_REPLACE: 4986 return "replace"; 4987 default: 4988 return ""; 4989 } 4990 } 4991 4992 @Override 4993 public String toString() { 4994 return "[mType=" + getTypeString() + ", " + 4995 "mOldText=" + mOldText + ", " + 4996 "mOldTextStart=" + mOldTextStart + ", " + 4997 "mNewText=" + mNewText + ", " + 4998 "mNewTextStart=" + mNewTextStart + ", " + 4999 "mOldCursorPos=" + mOldCursorPos + ", " + 5000 "mNewCursorPos=" + mNewCursorPos + "]"; 5001 } 5002 5003 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5004 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5005 @Override 5006 public EditOperation createFromParcel(Parcel in) { 5007 return new EditOperation(in, null); 5008 } 5009 5010 @Override 5011 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5012 return new EditOperation(in, loader); 5013 } 5014 5015 @Override 5016 public EditOperation[] newArray(int size) { 5017 return new EditOperation[size]; 5018 } 5019 }; 5020 } 5021} 5022