Editor.java revision 10ff56ec6d402a69f53ee899e54e3c1de7bf3b1a
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.content.UndoManager; 20import android.content.UndoOperation; 21import android.content.UndoOwner; 22import android.os.Build; 23import android.os.Parcel; 24import android.os.Parcelable; 25import android.text.InputFilter; 26import com.android.internal.util.ArrayUtils; 27import com.android.internal.util.GrowingArrayUtils; 28import com.android.internal.view.menu.MenuBuilder; 29import com.android.internal.widget.EditableInputConnection; 30 31import android.R; 32import android.app.PendingIntent; 33import android.app.PendingIntent.CanceledException; 34import android.content.ClipData; 35import android.content.ClipData.Item; 36import android.content.Context; 37import android.content.Intent; 38import android.content.pm.PackageManager; 39import android.content.res.TypedArray; 40import android.graphics.Canvas; 41import android.graphics.Color; 42import android.graphics.Matrix; 43import android.graphics.Paint; 44import android.graphics.Path; 45import android.graphics.Rect; 46import android.graphics.RectF; 47import android.graphics.drawable.Drawable; 48import android.inputmethodservice.ExtractEditText; 49import android.os.Bundle; 50import android.os.Handler; 51import android.os.ParcelableParcel; 52import android.os.SystemClock; 53import android.provider.Settings; 54import android.text.DynamicLayout; 55import android.text.Editable; 56import android.text.InputType; 57import android.text.Layout; 58import android.text.ParcelableSpan; 59import android.text.Selection; 60import android.text.SpanWatcher; 61import android.text.Spannable; 62import android.text.SpannableStringBuilder; 63import android.text.Spanned; 64import android.text.StaticLayout; 65import android.text.TextUtils; 66import android.text.method.KeyListener; 67import android.text.method.MetaKeyKeyListener; 68import android.text.method.MovementMethod; 69import android.text.method.PasswordTransformationMethod; 70import android.text.method.WordIterator; 71import android.text.style.EasyEditSpan; 72import android.text.style.SuggestionRangeSpan; 73import android.text.style.SuggestionSpan; 74import android.text.style.TextAppearanceSpan; 75import android.text.style.URLSpan; 76import android.util.DisplayMetrics; 77import android.util.Log; 78import android.view.ActionMode; 79import android.view.ActionMode.Callback; 80import android.view.DisplayListCanvas; 81import android.view.DragEvent; 82import android.view.Gravity; 83import android.view.LayoutInflater; 84import android.view.Menu; 85import android.view.MenuItem; 86import android.view.MotionEvent; 87import android.view.RenderNode; 88import android.view.View; 89import android.view.View.DragShadowBuilder; 90import android.view.View.OnClickListener; 91import android.view.ViewConfiguration; 92import android.view.ViewGroup; 93import android.view.ViewGroup.LayoutParams; 94import android.view.ViewParent; 95import android.view.ViewTreeObserver; 96import android.view.WindowManager; 97import android.view.inputmethod.CorrectionInfo; 98import android.view.inputmethod.CursorAnchorInfo; 99import android.view.inputmethod.EditorInfo; 100import android.view.inputmethod.ExtractedText; 101import android.view.inputmethod.ExtractedTextRequest; 102import android.view.inputmethod.InputConnection; 103import android.view.inputmethod.InputMethodManager; 104import android.widget.AdapterView.OnItemClickListener; 105import android.widget.TextView.Drawables; 106import android.widget.TextView.OnEditorActionListener; 107 108import java.text.BreakIterator; 109import java.util.Arrays; 110import java.util.Comparator; 111import java.util.HashMap; 112 113/** 114 * Helper class used by TextView to handle editable text views. 115 * 116 * @hide 117 */ 118public class Editor { 119 private static final String TAG = "Editor"; 120 private static final boolean DEBUG_UNDO = false; 121 122 static final int BLINK = 500; 123 private static final float[] TEMP_POSITION = new float[2]; 124 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 125 // Tag used when the Editor maintains its own separate UndoManager. 126 private static final String UNDO_OWNER_TAG = "Editor"; 127 128 // Each Editor manages its own undo stack. 129 private final UndoManager mUndoManager = new UndoManager(); 130 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 131 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 132 boolean mAllowUndo = true; 133 134 // Cursor Controllers. 135 InsertionPointCursorController mInsertionPointCursorController; 136 SelectionModifierCursorController mSelectionModifierCursorController; 137 ActionMode mSelectionActionMode; 138 boolean mInsertionControllerEnabled; 139 boolean mSelectionControllerEnabled; 140 141 // Used to highlight a word when it is corrected by the IME 142 CorrectionHighlighter mCorrectionHighlighter; 143 144 InputContentType mInputContentType; 145 InputMethodState mInputMethodState; 146 147 private static class TextDisplayList { 148 RenderNode displayList; 149 boolean isDirty; 150 public TextDisplayList(String name) { 151 isDirty = true; 152 displayList = RenderNode.create(name, null); 153 } 154 boolean needsRecord() { return isDirty || !displayList.isValid(); } 155 } 156 TextDisplayList[] mTextDisplayLists; 157 158 boolean mFrozenWithFocus; 159 boolean mSelectionMoved; 160 boolean mTouchFocusSelected; 161 162 KeyListener mKeyListener; 163 int mInputType = EditorInfo.TYPE_NULL; 164 165 boolean mDiscardNextActionUp; 166 boolean mIgnoreActionUpEvent; 167 168 long mShowCursor; 169 Blink mBlink; 170 171 boolean mCursorVisible = true; 172 boolean mSelectAllOnFocus; 173 boolean mTextIsSelectable; 174 175 CharSequence mError; 176 boolean mErrorWasChanged; 177 ErrorPopup mErrorPopup; 178 179 /** 180 * This flag is set if the TextView tries to display an error before it 181 * is attached to the window (so its position is still unknown). 182 * It causes the error to be shown later, when onAttachedToWindow() 183 * is called. 184 */ 185 boolean mShowErrorAfterAttach; 186 187 boolean mInBatchEditControllers; 188 boolean mShowSoftInputOnFocus = true; 189 boolean mPreserveDetachedSelection; 190 boolean mTemporaryDetach; 191 192 SuggestionsPopupWindow mSuggestionsPopupWindow; 193 SuggestionRangeSpan mSuggestionRangeSpan; 194 Runnable mShowSuggestionRunnable; 195 196 final Drawable[] mCursorDrawable = new Drawable[2]; 197 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 198 199 private Drawable mSelectHandleLeft; 200 private Drawable mSelectHandleRight; 201 private Drawable mSelectHandleCenter; 202 203 // Global listener that detects changes in the global position of the TextView 204 private PositionListener mPositionListener; 205 206 float mLastDownPositionX, mLastDownPositionY; 207 Callback mCustomSelectionActionModeCallback; 208 209 // Set when this TextView gained focus with some text selected. Will start selection mode. 210 boolean mCreatedWithASelection; 211 212 // The span controller helps monitoring the changes to which the Editor needs to react: 213 // - EasyEditSpans, for which we have some UI to display on attach and on hide 214 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 215 private SpanController mSpanController; 216 217 WordIterator mWordIterator; 218 SpellChecker mSpellChecker; 219 220 // This word iterator is set with text and used to determine word boundaries 221 // when a user is selecting text. 222 private WordIterator mWordIteratorWithText; 223 // Indicate that the text in the word iterator needs to be updated. 224 private boolean mUpdateWordIteratorText; 225 226 private Rect mTempRect; 227 228 private TextView mTextView; 229 230 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 231 232 Editor(TextView textView) { 233 mTextView = textView; 234 // Synchronize the filter list, which places the undo input filter at the end. 235 mTextView.setFilters(mTextView.getFilters()); 236 } 237 238 ParcelableParcel saveInstanceState() { 239 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 private 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, 0); 1005 stopSelectionActionMode(); 1006 } else { 1007 stopSelectionActionMode(); 1008 startSelectionActionModeWithSelection(); 1009 } 1010 handled = true; 1011 } 1012 1013 // Start a new selection 1014 if (!handled) { 1015 handled = startSelectionActionModeWithSelection(); 1016 } 1017 1018 return handled; 1019 } 1020 1021 private long getLastTouchOffsets() { 1022 SelectionModifierCursorController selectionController = getSelectionController(); 1023 final int minOffset = selectionController.getMinTouchOffset(); 1024 final int maxOffset = selectionController.getMaxTouchOffset(); 1025 return TextUtils.packRangeInLong(minOffset, maxOffset); 1026 } 1027 1028 void onFocusChanged(boolean focused, int direction) { 1029 mShowCursor = SystemClock.uptimeMillis(); 1030 ensureEndedBatchEdit(); 1031 1032 if (focused) { 1033 int selStart = mTextView.getSelectionStart(); 1034 int selEnd = mTextView.getSelectionEnd(); 1035 1036 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1037 // mode for these, unless there was a specific selection already started. 1038 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1039 selEnd == mTextView.getText().length(); 1040 1041 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1042 !isFocusHighlighted; 1043 1044 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1045 // If a tap was used to give focus to that view, move cursor at tap position. 1046 // Has to be done before onTakeFocus, which can be overloaded. 1047 final int lastTapPosition = getLastTapPosition(); 1048 if (lastTapPosition >= 0) { 1049 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1050 } 1051 1052 // Note this may have to be moved out of the Editor class 1053 MovementMethod mMovement = mTextView.getMovementMethod(); 1054 if (mMovement != null) { 1055 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1056 } 1057 1058 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1059 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1060 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1061 // This special case ensure that we keep current selection in that case. 1062 // It would be better to know why the DecorView does not have focus at that time. 1063 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1064 selStart >= 0 && selEnd >= 0) { 1065 /* 1066 * Someone intentionally set the selection, so let them 1067 * do whatever it is that they wanted to do instead of 1068 * the default on-focus behavior. We reset the selection 1069 * here instead of just skipping the onTakeFocus() call 1070 * because some movement methods do something other than 1071 * just setting the selection in theirs and we still 1072 * need to go through that path. 1073 */ 1074 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1075 } 1076 1077 if (mSelectAllOnFocus) { 1078 mTextView.selectAllText(); 1079 } 1080 1081 mTouchFocusSelected = true; 1082 } 1083 1084 mFrozenWithFocus = false; 1085 mSelectionMoved = false; 1086 1087 if (mError != null) { 1088 showError(); 1089 } 1090 1091 makeBlink(); 1092 } else { 1093 if (mError != null) { 1094 hideError(); 1095 } 1096 // Don't leave us in the middle of a batch edit. 1097 mTextView.onEndBatchEdit(); 1098 1099 if (mTextView instanceof ExtractEditText) { 1100 // terminateTextSelectionMode removes selection, which we want to keep when 1101 // ExtractEditText goes out of focus. 1102 final int selStart = mTextView.getSelectionStart(); 1103 final int selEnd = mTextView.getSelectionEnd(); 1104 hideControllers(); 1105 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1106 } else { 1107 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1108 hideControllers(); 1109 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1110 downgradeEasyCorrectionSpans(); 1111 } 1112 1113 // No need to create the controller 1114 if (mSelectionModifierCursorController != null) { 1115 mSelectionModifierCursorController.resetTouchOffsets(); 1116 } 1117 } 1118 } 1119 1120 /** 1121 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1122 * span. 1123 */ 1124 private void downgradeEasyCorrectionSpans() { 1125 CharSequence text = mTextView.getText(); 1126 if (text instanceof Spannable) { 1127 Spannable spannable = (Spannable) text; 1128 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1129 spannable.length(), SuggestionSpan.class); 1130 for (int i = 0; i < suggestionSpans.length; i++) { 1131 int flags = suggestionSpans[i].getFlags(); 1132 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1133 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1134 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1135 suggestionSpans[i].setFlags(flags); 1136 } 1137 } 1138 } 1139 } 1140 1141 void sendOnTextChanged(int start, int after) { 1142 updateSpellCheckSpans(start, start + after, false); 1143 1144 // Flip flag to indicate the word iterator needs to have the text reset. 1145 mUpdateWordIteratorText = true; 1146 1147 // Hide the controllers as soon as text is modified (typing, procedural...) 1148 // We do not hide the span controllers, since they can be added when a new text is 1149 // inserted into the text view (voice IME). 1150 hideCursorControllers(); 1151 } 1152 1153 private int getLastTapPosition() { 1154 // No need to create the controller at that point, no last tap position saved 1155 if (mSelectionModifierCursorController != null) { 1156 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1157 if (lastTapPosition >= 0) { 1158 // Safety check, should not be possible. 1159 if (lastTapPosition > mTextView.getText().length()) { 1160 lastTapPosition = mTextView.getText().length(); 1161 } 1162 return lastTapPosition; 1163 } 1164 } 1165 1166 return -1; 1167 } 1168 1169 void onWindowFocusChanged(boolean hasWindowFocus) { 1170 if (hasWindowFocus) { 1171 if (mBlink != null) { 1172 mBlink.uncancel(); 1173 makeBlink(); 1174 } 1175 } else { 1176 if (mBlink != null) { 1177 mBlink.cancel(); 1178 } 1179 if (mInputContentType != null) { 1180 mInputContentType.enterDown = false; 1181 } 1182 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1183 hideControllers(); 1184 if (mSuggestionsPopupWindow != null) { 1185 mSuggestionsPopupWindow.onParentLostFocus(); 1186 } 1187 1188 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1189 ensureEndedBatchEdit(); 1190 } 1191 } 1192 1193 void onTouchEvent(MotionEvent event) { 1194 if (hasSelectionController()) { 1195 getSelectionController().onTouchEvent(event); 1196 } 1197 1198 if (mShowSuggestionRunnable != null) { 1199 mTextView.removeCallbacks(mShowSuggestionRunnable); 1200 mShowSuggestionRunnable = null; 1201 } 1202 1203 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1204 mLastDownPositionX = event.getX(); 1205 mLastDownPositionY = event.getY(); 1206 1207 // Reset this state; it will be re-set if super.onTouchEvent 1208 // causes focus to move to the view. 1209 mTouchFocusSelected = false; 1210 mIgnoreActionUpEvent = false; 1211 } 1212 } 1213 1214 public void beginBatchEdit() { 1215 mInBatchEditControllers = true; 1216 final InputMethodState ims = mInputMethodState; 1217 if (ims != null) { 1218 int nesting = ++ims.mBatchEditNesting; 1219 if (nesting == 1) { 1220 ims.mCursorChanged = false; 1221 ims.mChangedDelta = 0; 1222 if (ims.mContentChanged) { 1223 // We already have a pending change from somewhere else, 1224 // so turn this into a full update. 1225 ims.mChangedStart = 0; 1226 ims.mChangedEnd = mTextView.getText().length(); 1227 } else { 1228 ims.mChangedStart = EXTRACT_UNKNOWN; 1229 ims.mChangedEnd = EXTRACT_UNKNOWN; 1230 ims.mContentChanged = false; 1231 } 1232 mUndoInputFilter.beginBatchEdit(); 1233 mTextView.onBeginBatchEdit(); 1234 } 1235 } 1236 } 1237 1238 public void endBatchEdit() { 1239 mInBatchEditControllers = false; 1240 final InputMethodState ims = mInputMethodState; 1241 if (ims != null) { 1242 int nesting = --ims.mBatchEditNesting; 1243 if (nesting == 0) { 1244 finishBatchEdit(ims); 1245 } 1246 } 1247 } 1248 1249 void ensureEndedBatchEdit() { 1250 final InputMethodState ims = mInputMethodState; 1251 if (ims != null && ims.mBatchEditNesting != 0) { 1252 ims.mBatchEditNesting = 0; 1253 finishBatchEdit(ims); 1254 } 1255 } 1256 1257 void finishBatchEdit(final InputMethodState ims) { 1258 mTextView.onEndBatchEdit(); 1259 mUndoInputFilter.endBatchEdit(); 1260 1261 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1262 mTextView.updateAfterEdit(); 1263 reportExtractedText(); 1264 } else if (ims.mCursorChanged) { 1265 // Cheesy way to get us to report the current cursor location. 1266 mTextView.invalidateCursor(); 1267 } 1268 // sendUpdateSelection knows to avoid sending if the selection did 1269 // not actually change. 1270 sendUpdateSelection(); 1271 } 1272 1273 static final int EXTRACT_NOTHING = -2; 1274 static final int EXTRACT_UNKNOWN = -1; 1275 1276 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1277 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1278 EXTRACT_UNKNOWN, outText); 1279 } 1280 1281 private boolean extractTextInternal(ExtractedTextRequest request, 1282 int partialStartOffset, int partialEndOffset, int delta, 1283 ExtractedText outText) { 1284 final CharSequence content = mTextView.getText(); 1285 if (content != null) { 1286 if (partialStartOffset != EXTRACT_NOTHING) { 1287 final int N = content.length(); 1288 if (partialStartOffset < 0) { 1289 outText.partialStartOffset = outText.partialEndOffset = -1; 1290 partialStartOffset = 0; 1291 partialEndOffset = N; 1292 } else { 1293 // Now use the delta to determine the actual amount of text 1294 // we need. 1295 partialEndOffset += delta; 1296 // Adjust offsets to ensure we contain full spans. 1297 if (content instanceof Spanned) { 1298 Spanned spanned = (Spanned)content; 1299 Object[] spans = spanned.getSpans(partialStartOffset, 1300 partialEndOffset, ParcelableSpan.class); 1301 int i = spans.length; 1302 while (i > 0) { 1303 i--; 1304 int j = spanned.getSpanStart(spans[i]); 1305 if (j < partialStartOffset) partialStartOffset = j; 1306 j = spanned.getSpanEnd(spans[i]); 1307 if (j > partialEndOffset) partialEndOffset = j; 1308 } 1309 } 1310 outText.partialStartOffset = partialStartOffset; 1311 outText.partialEndOffset = partialEndOffset - delta; 1312 1313 if (partialStartOffset > N) { 1314 partialStartOffset = N; 1315 } else if (partialStartOffset < 0) { 1316 partialStartOffset = 0; 1317 } 1318 if (partialEndOffset > N) { 1319 partialEndOffset = N; 1320 } else if (partialEndOffset < 0) { 1321 partialEndOffset = 0; 1322 } 1323 } 1324 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1325 outText.text = content.subSequence(partialStartOffset, 1326 partialEndOffset); 1327 } else { 1328 outText.text = TextUtils.substring(content, partialStartOffset, 1329 partialEndOffset); 1330 } 1331 } else { 1332 outText.partialStartOffset = 0; 1333 outText.partialEndOffset = 0; 1334 outText.text = ""; 1335 } 1336 outText.flags = 0; 1337 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1338 outText.flags |= ExtractedText.FLAG_SELECTING; 1339 } 1340 if (mTextView.isSingleLine()) { 1341 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1342 } 1343 outText.startOffset = 0; 1344 outText.selectionStart = mTextView.getSelectionStart(); 1345 outText.selectionEnd = mTextView.getSelectionEnd(); 1346 return true; 1347 } 1348 return false; 1349 } 1350 1351 boolean reportExtractedText() { 1352 final Editor.InputMethodState ims = mInputMethodState; 1353 if (ims != null) { 1354 final boolean contentChanged = ims.mContentChanged; 1355 if (contentChanged || ims.mSelectionModeChanged) { 1356 ims.mContentChanged = false; 1357 ims.mSelectionModeChanged = false; 1358 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1359 if (req != null) { 1360 InputMethodManager imm = InputMethodManager.peekInstance(); 1361 if (imm != null) { 1362 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1363 "Retrieving extracted start=" + ims.mChangedStart + 1364 " end=" + ims.mChangedEnd + 1365 " delta=" + ims.mChangedDelta); 1366 if (ims.mChangedStart < 0 && !contentChanged) { 1367 ims.mChangedStart = EXTRACT_NOTHING; 1368 } 1369 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1370 ims.mChangedDelta, ims.mExtractedText)) { 1371 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1372 "Reporting extracted start=" + 1373 ims.mExtractedText.partialStartOffset + 1374 " end=" + ims.mExtractedText.partialEndOffset + 1375 ": " + ims.mExtractedText.text); 1376 1377 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1378 ims.mChangedStart = EXTRACT_UNKNOWN; 1379 ims.mChangedEnd = EXTRACT_UNKNOWN; 1380 ims.mChangedDelta = 0; 1381 ims.mContentChanged = false; 1382 return true; 1383 } 1384 } 1385 } 1386 } 1387 } 1388 return false; 1389 } 1390 1391 private void sendUpdateSelection() { 1392 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1393 final InputMethodManager imm = InputMethodManager.peekInstance(); 1394 if (null != imm) { 1395 final int selectionStart = mTextView.getSelectionStart(); 1396 final int selectionEnd = mTextView.getSelectionEnd(); 1397 int candStart = -1; 1398 int candEnd = -1; 1399 if (mTextView.getText() instanceof Spannable) { 1400 final Spannable sp = (Spannable) mTextView.getText(); 1401 candStart = EditableInputConnection.getComposingSpanStart(sp); 1402 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1403 } 1404 // InputMethodManager#updateSelection skips sending the message if 1405 // none of the parameters have changed since the last time we called it. 1406 imm.updateSelection(mTextView, 1407 selectionStart, selectionEnd, candStart, candEnd); 1408 } 1409 } 1410 } 1411 1412 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1413 int cursorOffsetVertical) { 1414 final int selectionStart = mTextView.getSelectionStart(); 1415 final int selectionEnd = mTextView.getSelectionEnd(); 1416 1417 final InputMethodState ims = mInputMethodState; 1418 if (ims != null && ims.mBatchEditNesting == 0) { 1419 InputMethodManager imm = InputMethodManager.peekInstance(); 1420 if (imm != null) { 1421 if (imm.isActive(mTextView)) { 1422 boolean reported = false; 1423 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1424 // We are in extract mode and the content has changed 1425 // in some way... just report complete new text to the 1426 // input method. 1427 reported = reportExtractedText(); 1428 } 1429 } 1430 } 1431 } 1432 1433 if (mCorrectionHighlighter != null) { 1434 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1435 } 1436 1437 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1438 drawCursor(canvas, cursorOffsetVertical); 1439 // Rely on the drawable entirely, do not draw the cursor line. 1440 // Has to be done after the IMM related code above which relies on the highlight. 1441 highlight = null; 1442 } 1443 1444 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1445 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1446 cursorOffsetVertical); 1447 } else { 1448 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1449 } 1450 } 1451 1452 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1453 Paint highlightPaint, int cursorOffsetVertical) { 1454 final long lineRange = layout.getLineRangeForDraw(canvas); 1455 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1456 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1457 if (lastLine < 0) return; 1458 1459 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1460 firstLine, lastLine); 1461 1462 if (layout instanceof DynamicLayout) { 1463 if (mTextDisplayLists == null) { 1464 mTextDisplayLists = ArrayUtils.emptyArray(TextDisplayList.class); 1465 } 1466 1467 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1468 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1469 int[] blockIndices = dynamicLayout.getBlockIndices(); 1470 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1471 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1472 1473 int endOfPreviousBlock = -1; 1474 int searchStartIndex = 0; 1475 for (int i = 0; i < numberOfBlocks; i++) { 1476 int blockEndLine = blockEndLines[i]; 1477 int blockIndex = blockIndices[i]; 1478 1479 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1480 if (blockIsInvalid) { 1481 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1482 searchStartIndex); 1483 // Note how dynamic layout's internal block indices get updated from Editor 1484 blockIndices[i] = blockIndex; 1485 if (mTextDisplayLists[blockIndex] != null) { 1486 mTextDisplayLists[blockIndex].isDirty = true; 1487 } 1488 searchStartIndex = blockIndex + 1; 1489 } 1490 1491 if (mTextDisplayLists[blockIndex] == null) { 1492 mTextDisplayLists[blockIndex] = 1493 new TextDisplayList("Text " + blockIndex); 1494 } 1495 1496 final boolean blockDisplayListIsInvalid = mTextDisplayLists[blockIndex].needsRecord(); 1497 RenderNode blockDisplayList = mTextDisplayLists[blockIndex].displayList; 1498 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1499 final int blockBeginLine = endOfPreviousBlock + 1; 1500 final int top = layout.getLineTop(blockBeginLine); 1501 final int bottom = layout.getLineBottom(blockEndLine); 1502 int left = 0; 1503 int right = mTextView.getWidth(); 1504 if (mTextView.getHorizontallyScrolling()) { 1505 float min = Float.MAX_VALUE; 1506 float max = Float.MIN_VALUE; 1507 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1508 min = Math.min(min, layout.getLineLeft(line)); 1509 max = Math.max(max, layout.getLineRight(line)); 1510 } 1511 left = (int) min; 1512 right = (int) (max + 0.5f); 1513 } 1514 1515 // Rebuild display list if it is invalid 1516 if (blockDisplayListIsInvalid) { 1517 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1518 right - left, bottom - top); 1519 try { 1520 // drawText is always relative to TextView's origin, this translation 1521 // brings this range of text back to the top left corner of the viewport 1522 displayListCanvas.translate(-left, -top); 1523 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1524 mTextDisplayLists[blockIndex].isDirty = false; 1525 // No need to untranslate, previous context is popped after 1526 // drawDisplayList 1527 } finally { 1528 blockDisplayList.end(displayListCanvas); 1529 // Same as drawDisplayList below, handled by our TextView's parent 1530 blockDisplayList.setClipToBounds(false); 1531 } 1532 } 1533 1534 // Valid disply list whose index is >= indexFirstChangedBlock 1535 // only needs to update its drawing location. 1536 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1537 } 1538 1539 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList, 1540 0 /* no child clipping, our TextView parent enforces it */); 1541 1542 endOfPreviousBlock = blockEndLine; 1543 } 1544 1545 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1546 } else { 1547 // Boring layout is used for empty and hint text 1548 layout.drawText(canvas, firstLine, lastLine); 1549 } 1550 } 1551 1552 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1553 int searchStartIndex) { 1554 int length = mTextDisplayLists.length; 1555 for (int i = searchStartIndex; i < length; i++) { 1556 boolean blockIndexFound = false; 1557 for (int j = 0; j < numberOfBlocks; j++) { 1558 if (blockIndices[j] == i) { 1559 blockIndexFound = true; 1560 break; 1561 } 1562 } 1563 if (blockIndexFound) continue; 1564 return i; 1565 } 1566 1567 // No available index found, the pool has to grow 1568 mTextDisplayLists = GrowingArrayUtils.append(mTextDisplayLists, length, null); 1569 return length; 1570 } 1571 1572 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1573 final boolean translate = cursorOffsetVertical != 0; 1574 if (translate) canvas.translate(0, cursorOffsetVertical); 1575 for (int i = 0; i < mCursorCount; i++) { 1576 mCursorDrawable[i].draw(canvas); 1577 } 1578 if (translate) canvas.translate(0, -cursorOffsetVertical); 1579 } 1580 1581 /** 1582 * Invalidates all the sub-display lists that overlap the specified character range 1583 */ 1584 void invalidateTextDisplayList(Layout layout, int start, int end) { 1585 if (mTextDisplayLists != null && layout instanceof DynamicLayout) { 1586 final int firstLine = layout.getLineForOffset(start); 1587 final int lastLine = layout.getLineForOffset(end); 1588 1589 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1590 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1591 int[] blockIndices = dynamicLayout.getBlockIndices(); 1592 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1593 1594 int i = 0; 1595 // Skip the blocks before firstLine 1596 while (i < numberOfBlocks) { 1597 if (blockEndLines[i] >= firstLine) break; 1598 i++; 1599 } 1600 1601 // Invalidate all subsequent blocks until lastLine is passed 1602 while (i < numberOfBlocks) { 1603 final int blockIndex = blockIndices[i]; 1604 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1605 mTextDisplayLists[blockIndex].isDirty = true; 1606 } 1607 if (blockEndLines[i] >= lastLine) break; 1608 i++; 1609 } 1610 } 1611 } 1612 1613 void invalidateTextDisplayList() { 1614 if (mTextDisplayLists != null) { 1615 for (int i = 0; i < mTextDisplayLists.length; i++) { 1616 if (mTextDisplayLists[i] != null) mTextDisplayLists[i].isDirty = true; 1617 } 1618 } 1619 } 1620 1621 void updateCursorsPositions() { 1622 if (mTextView.mCursorDrawableRes == 0) { 1623 mCursorCount = 0; 1624 return; 1625 } 1626 1627 Layout layout = mTextView.getLayout(); 1628 Layout hintLayout = mTextView.getHintLayout(); 1629 final int offset = mTextView.getSelectionStart(); 1630 final int line = layout.getLineForOffset(offset); 1631 final int top = layout.getLineTop(line); 1632 final int bottom = layout.getLineTop(line + 1); 1633 1634 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1635 1636 int middle = bottom; 1637 if (mCursorCount == 2) { 1638 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1639 middle = (top + bottom) >> 1; 1640 } 1641 1642 boolean clamped = layout.shouldClampCursor(line); 1643 updateCursorPosition(0, top, middle, 1644 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1645 1646 if (mCursorCount == 2) { 1647 updateCursorPosition(1, middle, bottom, 1648 layout.getSecondaryHorizontal(offset, clamped)); 1649 } 1650 } 1651 1652 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1653 boolean clamped) { 1654 if (TextUtils.isEmpty(layout.getText()) && 1655 hintLayout != null && 1656 !TextUtils.isEmpty(hintLayout.getText())) { 1657 return hintLayout.getPrimaryHorizontal(offset, clamped); 1658 } else { 1659 return layout.getPrimaryHorizontal(offset, clamped); 1660 } 1661 } 1662 1663 /** 1664 * @return true if the selection mode was actually started. 1665 */ 1666 private boolean startSelectionActionModeWithoutSelection() { 1667 if (mSelectionActionMode != null) { 1668 // Selection action mode is already started 1669 return false; 1670 } 1671 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1672 mSelectionActionMode = mTextView.startActionMode(actionModeCallback); 1673 return mSelectionActionMode != null; 1674 } 1675 1676 /** 1677 * @return true if the selection mode was actually started. 1678 */ 1679 boolean startSelectionActionModeWithSelection() { 1680 if (mSelectionActionMode != null) { 1681 // Selection action mode is already started 1682 return false; 1683 } 1684 1685 if (!canSelectText() || !mTextView.requestFocus()) { 1686 Log.w(TextView.LOG_TAG, 1687 "TextView does not support text selection. Action mode cancelled."); 1688 return false; 1689 } 1690 1691 if (!mTextView.hasSelection()) { 1692 // There may already be a selection on device rotation 1693 if (!selectCurrentWord()) { 1694 // No word found under cursor or text selection not permitted. 1695 return false; 1696 } 1697 } 1698 1699 boolean willExtract = extractedTextModeWillBeStarted(); 1700 1701 // Do not start the action mode when extracted text will show up full screen, which would 1702 // immediately hide the newly created action bar and would be visually distracting. 1703 if (!willExtract) { 1704 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1705 mSelectionActionMode = mTextView.startActionMode(actionModeCallback); 1706 } 1707 1708 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1709 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1710 // Show the IME to be able to replace text, except when selecting non editable text. 1711 final InputMethodManager imm = InputMethodManager.peekInstance(); 1712 if (imm != null) { 1713 imm.showSoftInput(mTextView, 0, null); 1714 } 1715 } 1716 1717 if (selectionStarted) { 1718 getSelectionController().enterDrag(); 1719 } 1720 return selectionStarted; 1721 } 1722 1723 private boolean extractedTextModeWillBeStarted() { 1724 if (!(mTextView instanceof ExtractEditText)) { 1725 final InputMethodManager imm = InputMethodManager.peekInstance(); 1726 return imm != null && imm.isFullscreenMode(); 1727 } 1728 return false; 1729 } 1730 1731 /** 1732 * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}. 1733 */ 1734 private boolean isCursorInsideSuggestionSpan() { 1735 CharSequence text = mTextView.getText(); 1736 if (!(text instanceof Spannable)) return false; 1737 1738 SuggestionSpan[] suggestionSpans = ((Spannable) text).getSpans( 1739 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), SuggestionSpan.class); 1740 return (suggestionSpans.length > 0); 1741 } 1742 1743 /** 1744 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1745 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1746 */ 1747 private boolean isCursorInsideEasyCorrectionSpan() { 1748 Spannable spannable = (Spannable) mTextView.getText(); 1749 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1750 mTextView.getSelectionEnd(), SuggestionSpan.class); 1751 for (int i = 0; i < suggestionSpans.length; i++) { 1752 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1753 return true; 1754 } 1755 } 1756 return false; 1757 } 1758 1759 void onTouchUpEvent(MotionEvent event) { 1760 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1761 hideControllers(); 1762 CharSequence text = mTextView.getText(); 1763 if (!selectAllGotFocus && text.length() > 0) { 1764 // Move cursor 1765 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1766 Selection.setSelection((Spannable) text, offset); 1767 if (mSpellChecker != null) { 1768 // When the cursor moves, the word that was typed may need spell check 1769 mSpellChecker.onSelectionChanged(); 1770 } 1771 if (!extractedTextModeWillBeStarted()) { 1772 if (isCursorInsideEasyCorrectionSpan()) { 1773 mShowSuggestionRunnable = new Runnable() { 1774 public void run() { 1775 showSuggestions(); 1776 } 1777 }; 1778 // removeCallbacks is performed on every touch 1779 mTextView.postDelayed(mShowSuggestionRunnable, 1780 ViewConfiguration.getDoubleTapTimeout()); 1781 } else if (hasInsertionController()) { 1782 getInsertionController().show(); 1783 } 1784 } 1785 } 1786 } 1787 1788 protected void stopSelectionActionMode() { 1789 if (mSelectionActionMode != null) { 1790 // This will hide the mSelectionModifierCursorController 1791 mSelectionActionMode.finish(); 1792 } 1793 } 1794 1795 /** 1796 * @return True if this view supports insertion handles. 1797 */ 1798 boolean hasInsertionController() { 1799 return mInsertionControllerEnabled; 1800 } 1801 1802 /** 1803 * @return True if this view supports selection handles. 1804 */ 1805 boolean hasSelectionController() { 1806 return mSelectionControllerEnabled; 1807 } 1808 1809 InsertionPointCursorController getInsertionController() { 1810 if (!mInsertionControllerEnabled) { 1811 return null; 1812 } 1813 1814 if (mInsertionPointCursorController == null) { 1815 mInsertionPointCursorController = new InsertionPointCursorController(); 1816 1817 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1818 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1819 } 1820 1821 return mInsertionPointCursorController; 1822 } 1823 1824 SelectionModifierCursorController getSelectionController() { 1825 if (!mSelectionControllerEnabled) { 1826 return null; 1827 } 1828 1829 if (mSelectionModifierCursorController == null) { 1830 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1831 1832 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1833 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1834 } 1835 1836 return mSelectionModifierCursorController; 1837 } 1838 1839 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1840 if (mCursorDrawable[cursorIndex] == null) 1841 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1842 mTextView.mCursorDrawableRes); 1843 1844 if (mTempRect == null) mTempRect = new Rect(); 1845 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1846 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1847 horizontal = Math.max(0.5f, horizontal - 0.5f); 1848 final int left = (int) (horizontal) - mTempRect.left; 1849 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1850 bottom + mTempRect.bottom); 1851 } 1852 1853 /** 1854 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1855 * a dictionary) from the current input method, provided by it calling 1856 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1857 * implementation flashes the background of the corrected word to provide feedback to the user. 1858 * 1859 * @param info The auto correct info about the text that was corrected. 1860 */ 1861 public void onCommitCorrection(CorrectionInfo info) { 1862 if (mCorrectionHighlighter == null) { 1863 mCorrectionHighlighter = new CorrectionHighlighter(); 1864 } else { 1865 mCorrectionHighlighter.invalidate(false); 1866 } 1867 1868 mCorrectionHighlighter.highlight(info); 1869 } 1870 1871 void showSuggestions() { 1872 if (mSuggestionsPopupWindow == null) { 1873 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1874 } 1875 hideControllers(); 1876 mSuggestionsPopupWindow.show(); 1877 } 1878 1879 boolean areSuggestionsShown() { 1880 return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing(); 1881 } 1882 1883 void onScrollChanged() { 1884 if (mPositionListener != null) { 1885 mPositionListener.onScrollChanged(); 1886 } 1887 } 1888 1889 /** 1890 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1891 */ 1892 private boolean shouldBlink() { 1893 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1894 1895 final int start = mTextView.getSelectionStart(); 1896 if (start < 0) return false; 1897 1898 final int end = mTextView.getSelectionEnd(); 1899 if (end < 0) return false; 1900 1901 return start == end; 1902 } 1903 1904 void makeBlink() { 1905 if (shouldBlink()) { 1906 mShowCursor = SystemClock.uptimeMillis(); 1907 if (mBlink == null) mBlink = new Blink(); 1908 mBlink.removeCallbacks(mBlink); 1909 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 1910 } else { 1911 if (mBlink != null) mBlink.removeCallbacks(mBlink); 1912 } 1913 } 1914 1915 private class Blink extends Handler implements Runnable { 1916 private boolean mCancelled; 1917 1918 public void run() { 1919 if (mCancelled) { 1920 return; 1921 } 1922 1923 removeCallbacks(Blink.this); 1924 1925 if (shouldBlink()) { 1926 if (mTextView.getLayout() != null) { 1927 mTextView.invalidateCursorPath(); 1928 } 1929 1930 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 1931 } 1932 } 1933 1934 void cancel() { 1935 if (!mCancelled) { 1936 removeCallbacks(Blink.this); 1937 mCancelled = true; 1938 } 1939 } 1940 1941 void uncancel() { 1942 mCancelled = false; 1943 } 1944 } 1945 1946 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 1947 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 1948 com.android.internal.R.layout.text_drag_thumbnail, null); 1949 1950 if (shadowView == null) { 1951 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 1952 } 1953 1954 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 1955 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 1956 } 1957 shadowView.setText(text); 1958 shadowView.setTextColor(mTextView.getTextColors()); 1959 1960 shadowView.setTextAppearance(mTextView.getContext(), R.styleable.Theme_textAppearanceLarge); 1961 shadowView.setGravity(Gravity.CENTER); 1962 1963 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 1964 ViewGroup.LayoutParams.WRAP_CONTENT)); 1965 1966 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 1967 shadowView.measure(size, size); 1968 1969 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 1970 shadowView.invalidate(); 1971 return new DragShadowBuilder(shadowView); 1972 } 1973 1974 private static class DragLocalState { 1975 public TextView sourceTextView; 1976 public int start, end; 1977 1978 public DragLocalState(TextView sourceTextView, int start, int end) { 1979 this.sourceTextView = sourceTextView; 1980 this.start = start; 1981 this.end = end; 1982 } 1983 } 1984 1985 void onDrop(DragEvent event) { 1986 StringBuilder content = new StringBuilder(""); 1987 ClipData clipData = event.getClipData(); 1988 final int itemCount = clipData.getItemCount(); 1989 for (int i=0; i < itemCount; i++) { 1990 Item item = clipData.getItemAt(i); 1991 content.append(item.coerceToStyledText(mTextView.getContext())); 1992 } 1993 1994 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1995 1996 Object localState = event.getLocalState(); 1997 DragLocalState dragLocalState = null; 1998 if (localState instanceof DragLocalState) { 1999 dragLocalState = (DragLocalState) localState; 2000 } 2001 boolean dragDropIntoItself = dragLocalState != null && 2002 dragLocalState.sourceTextView == mTextView; 2003 2004 if (dragDropIntoItself) { 2005 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2006 // A drop inside the original selection discards the drop. 2007 return; 2008 } 2009 } 2010 2011 final int originalLength = mTextView.getText().length(); 2012 int min = offset; 2013 int max = offset; 2014 2015 Selection.setSelection((Spannable) mTextView.getText(), max); 2016 mTextView.replaceText_internal(min, max, content); 2017 2018 if (dragDropIntoItself) { 2019 int dragSourceStart = dragLocalState.start; 2020 int dragSourceEnd = dragLocalState.end; 2021 if (max <= dragSourceStart) { 2022 // Inserting text before selection has shifted positions 2023 final int shift = mTextView.getText().length() - originalLength; 2024 dragSourceStart += shift; 2025 dragSourceEnd += shift; 2026 } 2027 2028 // Delete original selection 2029 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2030 2031 // Make sure we do not leave two adjacent spaces. 2032 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2033 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2034 if (nextCharIdx > prevCharIdx + 1) { 2035 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2036 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2037 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2038 } 2039 } 2040 } 2041 } 2042 2043 public void addSpanWatchers(Spannable text) { 2044 final int textLength = text.length(); 2045 2046 if (mKeyListener != null) { 2047 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2048 } 2049 2050 if (mSpanController == null) { 2051 mSpanController = new SpanController(); 2052 } 2053 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2054 } 2055 2056 /** 2057 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2058 * pop-up should be displayed. 2059 * Also monitors {@link Selection} to call back to the attached input method. 2060 */ 2061 class SpanController implements SpanWatcher { 2062 2063 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2064 2065 private EasyEditPopupWindow mPopupWindow; 2066 2067 private Runnable mHidePopup; 2068 2069 // This function is pure but inner classes can't have static functions 2070 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2071 final Object span) { 2072 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2073 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2074 } 2075 2076 @Override 2077 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2078 if (isNonIntermediateSelectionSpan(text, span)) { 2079 sendUpdateSelection(); 2080 } else if (span instanceof EasyEditSpan) { 2081 if (mPopupWindow == null) { 2082 mPopupWindow = new EasyEditPopupWindow(); 2083 mHidePopup = new Runnable() { 2084 @Override 2085 public void run() { 2086 hide(); 2087 } 2088 }; 2089 } 2090 2091 // Make sure there is only at most one EasyEditSpan in the text 2092 if (mPopupWindow.mEasyEditSpan != null) { 2093 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2094 } 2095 2096 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2097 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2098 @Override 2099 public void onDeleteClick(EasyEditSpan span) { 2100 Editable editable = (Editable) mTextView.getText(); 2101 int start = editable.getSpanStart(span); 2102 int end = editable.getSpanEnd(span); 2103 if (start >= 0 && end >= 0) { 2104 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2105 mTextView.deleteText_internal(start, end); 2106 } 2107 editable.removeSpan(span); 2108 } 2109 }); 2110 2111 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2112 // The window is not visible yet, ignore the text change. 2113 return; 2114 } 2115 2116 if (mTextView.getLayout() == null) { 2117 // The view has not been laid out yet, ignore the text change 2118 return; 2119 } 2120 2121 if (extractedTextModeWillBeStarted()) { 2122 // The input is in extract mode. Do not handle the easy edit in 2123 // the original TextView, as the ExtractEditText will do 2124 return; 2125 } 2126 2127 mPopupWindow.show(); 2128 mTextView.removeCallbacks(mHidePopup); 2129 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2130 } 2131 } 2132 2133 @Override 2134 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2135 if (isNonIntermediateSelectionSpan(text, span)) { 2136 sendUpdateSelection(); 2137 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2138 hide(); 2139 } 2140 } 2141 2142 @Override 2143 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2144 int newStart, int newEnd) { 2145 if (isNonIntermediateSelectionSpan(text, span)) { 2146 sendUpdateSelection(); 2147 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2148 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2149 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2150 text.removeSpan(easyEditSpan); 2151 } 2152 } 2153 2154 public void hide() { 2155 if (mPopupWindow != null) { 2156 mPopupWindow.hide(); 2157 mTextView.removeCallbacks(mHidePopup); 2158 } 2159 } 2160 2161 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2162 try { 2163 PendingIntent pendingIntent = span.getPendingIntent(); 2164 if (pendingIntent != null) { 2165 Intent intent = new Intent(); 2166 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2167 pendingIntent.send(mTextView.getContext(), 0, intent); 2168 } 2169 } catch (CanceledException e) { 2170 // This should not happen, as we should try to send the intent only once. 2171 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2172 } 2173 } 2174 } 2175 2176 /** 2177 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2178 */ 2179 private interface EasyEditDeleteListener { 2180 2181 /** 2182 * Clicks the delete pop-up. 2183 */ 2184 void onDeleteClick(EasyEditSpan span); 2185 } 2186 2187 /** 2188 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2189 * by {@link SpanController}. 2190 */ 2191 private class EasyEditPopupWindow extends PinnedPopupWindow 2192 implements OnClickListener { 2193 private static final int POPUP_TEXT_LAYOUT = 2194 com.android.internal.R.layout.text_edit_action_popup_text; 2195 private TextView mDeleteTextView; 2196 private EasyEditSpan mEasyEditSpan; 2197 private EasyEditDeleteListener mOnDeleteListener; 2198 2199 @Override 2200 protected void createPopupWindow() { 2201 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2202 com.android.internal.R.attr.textSelectHandleWindowStyle); 2203 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2204 mPopupWindow.setClippingEnabled(true); 2205 } 2206 2207 @Override 2208 protected void initContentView() { 2209 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2210 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2211 mContentView = linearLayout; 2212 mContentView.setBackgroundResource( 2213 com.android.internal.R.drawable.text_edit_side_paste_window); 2214 2215 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2216 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2217 2218 LayoutParams wrapContent = new LayoutParams( 2219 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2220 2221 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2222 mDeleteTextView.setLayoutParams(wrapContent); 2223 mDeleteTextView.setText(com.android.internal.R.string.delete); 2224 mDeleteTextView.setOnClickListener(this); 2225 mContentView.addView(mDeleteTextView); 2226 } 2227 2228 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2229 mEasyEditSpan = easyEditSpan; 2230 } 2231 2232 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2233 mOnDeleteListener = listener; 2234 } 2235 2236 @Override 2237 public void onClick(View view) { 2238 if (view == mDeleteTextView 2239 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2240 && mOnDeleteListener != null) { 2241 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2242 } 2243 } 2244 2245 @Override 2246 public void hide() { 2247 if (mEasyEditSpan != null) { 2248 mEasyEditSpan.setDeleteEnabled(false); 2249 } 2250 mOnDeleteListener = null; 2251 super.hide(); 2252 } 2253 2254 @Override 2255 protected int getTextOffset() { 2256 // Place the pop-up at the end of the span 2257 Editable editable = (Editable) mTextView.getText(); 2258 return editable.getSpanEnd(mEasyEditSpan); 2259 } 2260 2261 @Override 2262 protected int getVerticalLocalPosition(int line) { 2263 return mTextView.getLayout().getLineBottom(line); 2264 } 2265 2266 @Override 2267 protected int clipVertically(int positionY) { 2268 // As we display the pop-up below the span, no vertical clipping is required. 2269 return positionY; 2270 } 2271 } 2272 2273 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2274 // 3 handles 2275 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2276 // 1 CursorAnchorInfoNotifier 2277 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2278 private TextViewPositionListener[] mPositionListeners = 2279 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2280 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2281 private boolean mPositionHasChanged = true; 2282 // Absolute position of the TextView with respect to its parent window 2283 private int mPositionX, mPositionY; 2284 private int mNumberOfListeners; 2285 private boolean mScrollHasChanged; 2286 final int[] mTempCoords = new int[2]; 2287 2288 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2289 if (mNumberOfListeners == 0) { 2290 updatePosition(); 2291 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2292 vto.addOnPreDrawListener(this); 2293 } 2294 2295 int emptySlotIndex = -1; 2296 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2297 TextViewPositionListener listener = mPositionListeners[i]; 2298 if (listener == positionListener) { 2299 return; 2300 } else if (emptySlotIndex < 0 && listener == null) { 2301 emptySlotIndex = i; 2302 } 2303 } 2304 2305 mPositionListeners[emptySlotIndex] = positionListener; 2306 mCanMove[emptySlotIndex] = canMove; 2307 mNumberOfListeners++; 2308 } 2309 2310 public void removeSubscriber(TextViewPositionListener positionListener) { 2311 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2312 if (mPositionListeners[i] == positionListener) { 2313 mPositionListeners[i] = null; 2314 mNumberOfListeners--; 2315 break; 2316 } 2317 } 2318 2319 if (mNumberOfListeners == 0) { 2320 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2321 vto.removeOnPreDrawListener(this); 2322 } 2323 } 2324 2325 public int getPositionX() { 2326 return mPositionX; 2327 } 2328 2329 public int getPositionY() { 2330 return mPositionY; 2331 } 2332 2333 @Override 2334 public boolean onPreDraw() { 2335 updatePosition(); 2336 2337 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2338 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2339 TextViewPositionListener positionListener = mPositionListeners[i]; 2340 if (positionListener != null) { 2341 positionListener.updatePosition(mPositionX, mPositionY, 2342 mPositionHasChanged, mScrollHasChanged); 2343 } 2344 } 2345 } 2346 2347 mScrollHasChanged = false; 2348 return true; 2349 } 2350 2351 private void updatePosition() { 2352 mTextView.getLocationInWindow(mTempCoords); 2353 2354 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2355 2356 mPositionX = mTempCoords[0]; 2357 mPositionY = mTempCoords[1]; 2358 } 2359 2360 public void onScrollChanged() { 2361 mScrollHasChanged = true; 2362 } 2363 } 2364 2365 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2366 protected PopupWindow mPopupWindow; 2367 protected ViewGroup mContentView; 2368 int mPositionX, mPositionY; 2369 2370 protected abstract void createPopupWindow(); 2371 protected abstract void initContentView(); 2372 protected abstract int getTextOffset(); 2373 protected abstract int getVerticalLocalPosition(int line); 2374 protected abstract int clipVertically(int positionY); 2375 2376 public PinnedPopupWindow() { 2377 createPopupWindow(); 2378 2379 mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 2380 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2381 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2382 2383 initContentView(); 2384 2385 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2386 ViewGroup.LayoutParams.WRAP_CONTENT); 2387 mContentView.setLayoutParams(wrapContent); 2388 2389 mPopupWindow.setContentView(mContentView); 2390 } 2391 2392 public void show() { 2393 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2394 2395 computeLocalPosition(); 2396 2397 final PositionListener positionListener = getPositionListener(); 2398 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2399 } 2400 2401 protected void measureContent() { 2402 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2403 mContentView.measure( 2404 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2405 View.MeasureSpec.AT_MOST), 2406 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2407 View.MeasureSpec.AT_MOST)); 2408 } 2409 2410 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2411 * positioned according to viewportToContentHorizontalOffset. 2412 * 2413 * This method assumes that mContentView has properly been measured from its content. */ 2414 private void computeLocalPosition() { 2415 measureContent(); 2416 final int width = mContentView.getMeasuredWidth(); 2417 final int offset = getTextOffset(); 2418 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2419 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2420 2421 final int line = mTextView.getLayout().getLineForOffset(offset); 2422 mPositionY = getVerticalLocalPosition(line); 2423 mPositionY += mTextView.viewportToContentVerticalOffset(); 2424 } 2425 2426 private void updatePosition(int parentPositionX, int parentPositionY) { 2427 int positionX = parentPositionX + mPositionX; 2428 int positionY = parentPositionY + mPositionY; 2429 2430 positionY = clipVertically(positionY); 2431 2432 // Horizontal clipping 2433 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2434 final int width = mContentView.getMeasuredWidth(); 2435 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2436 positionX = Math.max(0, positionX); 2437 2438 if (isShowing()) { 2439 mPopupWindow.update(positionX, positionY, -1, -1); 2440 } else { 2441 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2442 positionX, positionY); 2443 } 2444 } 2445 2446 public void hide() { 2447 mPopupWindow.dismiss(); 2448 getPositionListener().removeSubscriber(this); 2449 } 2450 2451 @Override 2452 public void updatePosition(int parentPositionX, int parentPositionY, 2453 boolean parentPositionChanged, boolean parentScrolled) { 2454 // Either parentPositionChanged or parentScrolled is true, check if still visible 2455 if (isShowing() && isOffsetVisible(getTextOffset())) { 2456 if (parentScrolled) computeLocalPosition(); 2457 updatePosition(parentPositionX, parentPositionY); 2458 } else { 2459 hide(); 2460 } 2461 } 2462 2463 public boolean isShowing() { 2464 return mPopupWindow.isShowing(); 2465 } 2466 } 2467 2468 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2469 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2470 private static final int ADD_TO_DICTIONARY = -1; 2471 private static final int DELETE_TEXT = -2; 2472 private SuggestionInfo[] mSuggestionInfos; 2473 private int mNumberOfSuggestions; 2474 private boolean mCursorWasVisibleBeforeSuggestions; 2475 private boolean mIsShowingUp = false; 2476 private SuggestionAdapter mSuggestionsAdapter; 2477 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2478 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2479 2480 private class CustomPopupWindow extends PopupWindow { 2481 public CustomPopupWindow(Context context, int defStyleAttr) { 2482 super(context, null, defStyleAttr); 2483 } 2484 2485 @Override 2486 public void dismiss() { 2487 super.dismiss(); 2488 2489 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2490 2491 // Safe cast since show() checks that mTextView.getText() is an Editable 2492 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2493 2494 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2495 if (hasInsertionController()) { 2496 getInsertionController().show(); 2497 } 2498 } 2499 } 2500 2501 public SuggestionsPopupWindow() { 2502 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2503 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2504 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2505 } 2506 2507 @Override 2508 protected void createPopupWindow() { 2509 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2510 com.android.internal.R.attr.textSuggestionsWindowStyle); 2511 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2512 mPopupWindow.setFocusable(true); 2513 mPopupWindow.setClippingEnabled(false); 2514 } 2515 2516 @Override 2517 protected void initContentView() { 2518 ListView listView = new ListView(mTextView.getContext()); 2519 mSuggestionsAdapter = new SuggestionAdapter(); 2520 listView.setAdapter(mSuggestionsAdapter); 2521 listView.setOnItemClickListener(this); 2522 mContentView = listView; 2523 2524 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2525 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2526 for (int i = 0; i < mSuggestionInfos.length; i++) { 2527 mSuggestionInfos[i] = new SuggestionInfo(); 2528 } 2529 } 2530 2531 public boolean isShowingUp() { 2532 return mIsShowingUp; 2533 } 2534 2535 public void onParentLostFocus() { 2536 mIsShowingUp = false; 2537 } 2538 2539 private class SuggestionInfo { 2540 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2541 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2542 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2543 SpannableStringBuilder text = new SpannableStringBuilder(); 2544 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2545 android.R.style.TextAppearance_SuggestionHighlight); 2546 } 2547 2548 private class SuggestionAdapter extends BaseAdapter { 2549 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2550 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2551 2552 @Override 2553 public int getCount() { 2554 return mNumberOfSuggestions; 2555 } 2556 2557 @Override 2558 public Object getItem(int position) { 2559 return mSuggestionInfos[position]; 2560 } 2561 2562 @Override 2563 public long getItemId(int position) { 2564 return position; 2565 } 2566 2567 @Override 2568 public View getView(int position, View convertView, ViewGroup parent) { 2569 TextView textView = (TextView) convertView; 2570 2571 if (textView == null) { 2572 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2573 parent, false); 2574 } 2575 2576 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2577 textView.setText(suggestionInfo.text); 2578 2579 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2580 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2581 textView.setBackgroundColor(Color.TRANSPARENT); 2582 } else { 2583 textView.setBackgroundColor(Color.WHITE); 2584 } 2585 2586 return textView; 2587 } 2588 } 2589 2590 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2591 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2592 final int flag1 = span1.getFlags(); 2593 final int flag2 = span2.getFlags(); 2594 if (flag1 != flag2) { 2595 // The order here should match what is used in updateDrawState 2596 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2597 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2598 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2599 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2600 if (easy1 && !misspelled1) return -1; 2601 if (easy2 && !misspelled2) return 1; 2602 if (misspelled1) return -1; 2603 if (misspelled2) return 1; 2604 } 2605 2606 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2607 } 2608 } 2609 2610 /** 2611 * Returns the suggestion spans that cover the current cursor position. The suggestion 2612 * spans are sorted according to the length of text that they are attached to. 2613 */ 2614 private SuggestionSpan[] getSuggestionSpans() { 2615 int pos = mTextView.getSelectionStart(); 2616 Spannable spannable = (Spannable) mTextView.getText(); 2617 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2618 2619 mSpansLengths.clear(); 2620 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2621 int start = spannable.getSpanStart(suggestionSpan); 2622 int end = spannable.getSpanEnd(suggestionSpan); 2623 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2624 } 2625 2626 // The suggestions are sorted according to their types (easy correction first, then 2627 // misspelled) and to the length of the text that they cover (shorter first). 2628 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2629 return suggestionSpans; 2630 } 2631 2632 @Override 2633 public void show() { 2634 if (!(mTextView.getText() instanceof Editable)) return; 2635 2636 if (updateSuggestions()) { 2637 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2638 mTextView.setCursorVisible(false); 2639 mIsShowingUp = true; 2640 super.show(); 2641 } 2642 } 2643 2644 @Override 2645 protected void measureContent() { 2646 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2647 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2648 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2649 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2650 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2651 2652 int width = 0; 2653 View view = null; 2654 for (int i = 0; i < mNumberOfSuggestions; i++) { 2655 view = mSuggestionsAdapter.getView(i, view, mContentView); 2656 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2657 view.measure(horizontalMeasure, verticalMeasure); 2658 width = Math.max(width, view.getMeasuredWidth()); 2659 } 2660 2661 // Enforce the width based on actual text widths 2662 mContentView.measure( 2663 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2664 verticalMeasure); 2665 2666 Drawable popupBackground = mPopupWindow.getBackground(); 2667 if (popupBackground != null) { 2668 if (mTempRect == null) mTempRect = new Rect(); 2669 popupBackground.getPadding(mTempRect); 2670 width += mTempRect.left + mTempRect.right; 2671 } 2672 mPopupWindow.setWidth(width); 2673 } 2674 2675 @Override 2676 protected int getTextOffset() { 2677 return mTextView.getSelectionStart(); 2678 } 2679 2680 @Override 2681 protected int getVerticalLocalPosition(int line) { 2682 return mTextView.getLayout().getLineBottom(line); 2683 } 2684 2685 @Override 2686 protected int clipVertically(int positionY) { 2687 final int height = mContentView.getMeasuredHeight(); 2688 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2689 return Math.min(positionY, displayMetrics.heightPixels - height); 2690 } 2691 2692 @Override 2693 public void hide() { 2694 super.hide(); 2695 } 2696 2697 private boolean updateSuggestions() { 2698 Spannable spannable = (Spannable) mTextView.getText(); 2699 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2700 2701 final int nbSpans = suggestionSpans.length; 2702 // Suggestions are shown after a delay: the underlying spans may have been removed 2703 if (nbSpans == 0) return false; 2704 2705 mNumberOfSuggestions = 0; 2706 int spanUnionStart = mTextView.getText().length(); 2707 int spanUnionEnd = 0; 2708 2709 SuggestionSpan misspelledSpan = null; 2710 int underlineColor = 0; 2711 2712 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2713 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2714 final int spanStart = spannable.getSpanStart(suggestionSpan); 2715 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2716 spanUnionStart = Math.min(spanStart, spanUnionStart); 2717 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2718 2719 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2720 misspelledSpan = suggestionSpan; 2721 } 2722 2723 // The first span dictates the background color of the highlighted text 2724 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2725 2726 String[] suggestions = suggestionSpan.getSuggestions(); 2727 int nbSuggestions = suggestions.length; 2728 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2729 String suggestion = suggestions[suggestionIndex]; 2730 2731 boolean suggestionIsDuplicate = false; 2732 for (int i = 0; i < mNumberOfSuggestions; i++) { 2733 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2734 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2735 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2736 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2737 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2738 suggestionIsDuplicate = true; 2739 break; 2740 } 2741 } 2742 } 2743 2744 if (!suggestionIsDuplicate) { 2745 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2746 suggestionInfo.suggestionSpan = suggestionSpan; 2747 suggestionInfo.suggestionIndex = suggestionIndex; 2748 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2749 2750 mNumberOfSuggestions++; 2751 2752 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2753 // Also end outer for loop 2754 spanIndex = nbSpans; 2755 break; 2756 } 2757 } 2758 } 2759 } 2760 2761 for (int i = 0; i < mNumberOfSuggestions; i++) { 2762 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2763 } 2764 2765 // Add "Add to dictionary" item if there is a span with the misspelled flag 2766 if (misspelledSpan != null) { 2767 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2768 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2769 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2770 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2771 suggestionInfo.suggestionSpan = misspelledSpan; 2772 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2773 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2774 getContext().getString(com.android.internal.R.string.addToDictionary)); 2775 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2776 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2777 2778 mNumberOfSuggestions++; 2779 } 2780 } 2781 2782 // Delete item 2783 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2784 suggestionInfo.suggestionSpan = null; 2785 suggestionInfo.suggestionIndex = DELETE_TEXT; 2786 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2787 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2788 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2789 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2790 mNumberOfSuggestions++; 2791 2792 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2793 if (underlineColor == 0) { 2794 // Fallback on the default highlight color when the first span does not provide one 2795 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2796 } else { 2797 final float BACKGROUND_TRANSPARENCY = 0.4f; 2798 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2799 mSuggestionRangeSpan.setBackgroundColor( 2800 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2801 } 2802 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2803 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2804 2805 mSuggestionsAdapter.notifyDataSetChanged(); 2806 return true; 2807 } 2808 2809 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2810 int unionEnd) { 2811 final Spannable text = (Spannable) mTextView.getText(); 2812 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2813 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2814 2815 // Adjust the start/end of the suggestion span 2816 suggestionInfo.suggestionStart = spanStart - unionStart; 2817 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2818 + suggestionInfo.text.length(); 2819 2820 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2821 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2822 2823 // Add the text before and after the span. 2824 final String textAsString = text.toString(); 2825 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2826 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2827 } 2828 2829 @Override 2830 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2831 Editable editable = (Editable) mTextView.getText(); 2832 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2833 2834 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2835 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2836 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2837 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2838 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2839 if (spanUnionEnd < editable.length() && 2840 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2841 (spanUnionStart == 0 || 2842 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2843 spanUnionEnd = spanUnionEnd + 1; 2844 } 2845 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2846 } 2847 hide(); 2848 return; 2849 } 2850 2851 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2852 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2853 if (spanStart < 0 || spanEnd <= spanStart) { 2854 // Span has been removed 2855 hide(); 2856 return; 2857 } 2858 2859 final String originalText = editable.toString().substring(spanStart, spanEnd); 2860 2861 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2862 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2863 intent.putExtra("word", originalText); 2864 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2865 // Put a listener to replace the original text with a word which the user 2866 // modified in a user dictionary dialog. 2867 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2868 mTextView.getContext().startActivity(intent); 2869 // There is no way to know if the word was indeed added. Re-check. 2870 // TODO The ExtractEditText should remove the span in the original text instead 2871 editable.removeSpan(suggestionInfo.suggestionSpan); 2872 Selection.setSelection(editable, spanEnd); 2873 updateSpellCheckSpans(spanStart, spanEnd, false); 2874 } else { 2875 // SuggestionSpans are removed by replace: save them before 2876 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2877 SuggestionSpan.class); 2878 final int length = suggestionSpans.length; 2879 int[] suggestionSpansStarts = new int[length]; 2880 int[] suggestionSpansEnds = new int[length]; 2881 int[] suggestionSpansFlags = new int[length]; 2882 for (int i = 0; i < length; i++) { 2883 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2884 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2885 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2886 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2887 2888 // Remove potential misspelled flags 2889 int suggestionSpanFlags = suggestionSpan.getFlags(); 2890 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2891 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2892 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2893 suggestionSpan.setFlags(suggestionSpanFlags); 2894 } 2895 } 2896 2897 final int suggestionStart = suggestionInfo.suggestionStart; 2898 final int suggestionEnd = suggestionInfo.suggestionEnd; 2899 final String suggestion = suggestionInfo.text.subSequence( 2900 suggestionStart, suggestionEnd).toString(); 2901 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2902 2903 // Notify source IME of the suggestion pick. Do this before 2904 // swaping texts. 2905 suggestionInfo.suggestionSpan.notifySelection( 2906 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 2907 2908 // Swap text content between actual text and Suggestion span 2909 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 2910 suggestions[suggestionInfo.suggestionIndex] = originalText; 2911 2912 // Restore previous SuggestionSpans 2913 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 2914 for (int i = 0; i < length; i++) { 2915 // Only spans that include the modified region make sense after replacement 2916 // Spans partially included in the replaced region are removed, there is no 2917 // way to assign them a valid range after replacement 2918 if (suggestionSpansStarts[i] <= spanStart && 2919 suggestionSpansEnds[i] >= spanEnd) { 2920 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2921 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 2922 } 2923 } 2924 2925 // Move cursor at the end of the replaced word 2926 final int newCursorPosition = spanEnd + lengthDifference; 2927 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2928 } 2929 2930 hide(); 2931 } 2932 } 2933 2934 /** 2935 * An ActionMode Callback class that is used to provide actions while in text selection mode. 2936 * 2937 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 2938 * on which of these this TextView supports. 2939 */ 2940 private class SelectionActionModeCallback implements ActionMode.Callback { 2941 2942 @Override 2943 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 2944 final boolean legacy = mTextView.getContext().getApplicationInfo().targetSdkVersion < 2945 Build.VERSION_CODES.LOLLIPOP; 2946 final Context context = !legacy && menu instanceof MenuBuilder ? 2947 ((MenuBuilder) menu).getContext() : 2948 mTextView.getContext(); 2949 final TypedArray styledAttributes = context.obtainStyledAttributes( 2950 com.android.internal.R.styleable.SelectionModeDrawables); 2951 2952 mode.setTitle(mTextView.getContext().getString( 2953 com.android.internal.R.string.textSelectionCABTitle)); 2954 mode.setSubtitle(null); 2955 mode.setTitleOptionalHint(true); 2956 2957 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 2958 setIcon(styledAttributes.getResourceId( 2959 R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0)). 2960 setAlphabeticShortcut('a'). 2961 setShowAsAction( 2962 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2963 2964 if (mTextView.canCut()) { 2965 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 2966 setIcon(styledAttributes.getResourceId( 2967 R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)). 2968 setAlphabeticShortcut('x'). 2969 setShowAsAction( 2970 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2971 } 2972 2973 if (mTextView.canCopy()) { 2974 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 2975 setIcon(styledAttributes.getResourceId( 2976 R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)). 2977 setAlphabeticShortcut('c'). 2978 setShowAsAction( 2979 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2980 } 2981 2982 if (mTextView.canPaste()) { 2983 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 2984 setIcon(styledAttributes.getResourceId( 2985 R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)). 2986 setAlphabeticShortcut('v'). 2987 setShowAsAction( 2988 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2989 } 2990 2991 if (mTextView.isSuggestionsEnabled() && isCursorInsideSuggestionSpan()) { 2992 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 2993 setShowAsAction( 2994 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2995 } 2996 2997 styledAttributes.recycle(); 2998 2999 if (mCustomSelectionActionModeCallback != null) { 3000 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 3001 // The custom mode can choose to cancel the action mode 3002 return false; 3003 } 3004 } 3005 3006 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3007 mTextView.setHasTransientState(true); 3008 return true; 3009 } else { 3010 return false; 3011 } 3012 } 3013 3014 @Override 3015 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3016 if (mCustomSelectionActionModeCallback != null) { 3017 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3018 } 3019 return true; 3020 } 3021 3022 @Override 3023 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3024 if (mCustomSelectionActionModeCallback != null && 3025 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3026 return true; 3027 } 3028 if (item.getItemId() == TextView.ID_REPLACE) { 3029 onReplace(); 3030 return true; 3031 } 3032 return mTextView.onTextContextMenuItem(item.getItemId()); 3033 } 3034 3035 @Override 3036 public void onDestroyActionMode(ActionMode mode) { 3037 if (mCustomSelectionActionModeCallback != null) { 3038 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3039 } 3040 3041 /* 3042 * If we're ending this mode because we're detaching from a window, 3043 * we still have selection state to preserve. Don't clear it, we'll 3044 * bring back the selection mode when (if) we get reattached. 3045 */ 3046 if (!mPreserveDetachedSelection) { 3047 Selection.setSelection((Spannable) mTextView.getText(), 3048 mTextView.getSelectionEnd()); 3049 mTextView.setHasTransientState(false); 3050 } 3051 3052 if (mSelectionModifierCursorController != null) { 3053 mSelectionModifierCursorController.hide(); 3054 } 3055 3056 mSelectionActionMode = null; 3057 } 3058 } 3059 3060 private void onReplace() { 3061 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3062 stopSelectionActionMode(); 3063 Selection.setSelection((Spannable) mTextView.getText(), middle); 3064 showSuggestions(); 3065 } 3066 3067 private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener { 3068 private static final int POPUP_TEXT_LAYOUT = 3069 com.android.internal.R.layout.text_edit_action_popup_text; 3070 private TextView mPasteTextView; 3071 private TextView mReplaceTextView; 3072 3073 @Override 3074 protected void createPopupWindow() { 3075 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 3076 com.android.internal.R.attr.textSelectHandleWindowStyle); 3077 mPopupWindow.setClippingEnabled(true); 3078 } 3079 3080 @Override 3081 protected void initContentView() { 3082 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 3083 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 3084 mContentView = linearLayout; 3085 mContentView.setBackgroundResource( 3086 com.android.internal.R.drawable.text_edit_paste_window); 3087 3088 LayoutInflater inflater = (LayoutInflater) mTextView.getContext(). 3089 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 3090 3091 LayoutParams wrapContent = new LayoutParams( 3092 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 3093 3094 mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 3095 mPasteTextView.setLayoutParams(wrapContent); 3096 mContentView.addView(mPasteTextView); 3097 mPasteTextView.setText(com.android.internal.R.string.paste); 3098 mPasteTextView.setOnClickListener(this); 3099 3100 mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 3101 mReplaceTextView.setLayoutParams(wrapContent); 3102 mContentView.addView(mReplaceTextView); 3103 mReplaceTextView.setText(com.android.internal.R.string.replace); 3104 mReplaceTextView.setOnClickListener(this); 3105 } 3106 3107 @Override 3108 public void show() { 3109 boolean canPaste = mTextView.canPaste(); 3110 boolean canSuggest = mTextView.isSuggestionsEnabled() && isCursorInsideSuggestionSpan(); 3111 mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE); 3112 mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE); 3113 3114 if (!canPaste && !canSuggest) return; 3115 3116 super.show(); 3117 } 3118 3119 @Override 3120 public void onClick(View view) { 3121 if (view == mPasteTextView && mTextView.canPaste()) { 3122 mTextView.onTextContextMenuItem(TextView.ID_PASTE); 3123 hide(); 3124 } else if (view == mReplaceTextView) { 3125 onReplace(); 3126 } 3127 } 3128 3129 @Override 3130 protected int getTextOffset() { 3131 return (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3132 } 3133 3134 @Override 3135 protected int getVerticalLocalPosition(int line) { 3136 return mTextView.getLayout().getLineTop(line) - mContentView.getMeasuredHeight(); 3137 } 3138 3139 @Override 3140 protected int clipVertically(int positionY) { 3141 if (positionY < 0) { 3142 final int offset = getTextOffset(); 3143 final Layout layout = mTextView.getLayout(); 3144 final int line = layout.getLineForOffset(offset); 3145 positionY += layout.getLineBottom(line) - layout.getLineTop(line); 3146 positionY += mContentView.getMeasuredHeight(); 3147 3148 // Assumes insertion and selection handles share the same height 3149 final Drawable handle = mTextView.getContext().getDrawable( 3150 mTextView.mTextSelectHandleRes); 3151 positionY += handle.getIntrinsicHeight(); 3152 } 3153 3154 return positionY; 3155 } 3156 } 3157 3158 /** 3159 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3160 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3161 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3162 */ 3163 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3164 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3165 final int[] mTmpIntOffset = new int[2]; 3166 final Matrix mViewToScreenMatrix = new Matrix(); 3167 3168 @Override 3169 public void updatePosition(int parentPositionX, int parentPositionY, 3170 boolean parentPositionChanged, boolean parentScrolled) { 3171 final InputMethodState ims = mInputMethodState; 3172 if (ims == null || ims.mBatchEditNesting > 0) { 3173 return; 3174 } 3175 final InputMethodManager imm = InputMethodManager.peekInstance(); 3176 if (null == imm) { 3177 return; 3178 } 3179 if (!imm.isActive(mTextView)) { 3180 return; 3181 } 3182 // Skip if the IME has not requested the cursor/anchor position. 3183 if (!imm.isCursorAnchorInfoEnabled()) { 3184 return; 3185 } 3186 Layout layout = mTextView.getLayout(); 3187 if (layout == null) { 3188 return; 3189 } 3190 3191 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3192 builder.reset(); 3193 3194 final int selectionStart = mTextView.getSelectionStart(); 3195 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3196 3197 // Construct transformation matrix from view local coordinates to screen coordinates. 3198 mViewToScreenMatrix.set(mTextView.getMatrix()); 3199 mTextView.getLocationOnScreen(mTmpIntOffset); 3200 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3201 builder.setMatrix(mViewToScreenMatrix); 3202 3203 final float viewportToContentHorizontalOffset = 3204 mTextView.viewportToContentHorizontalOffset(); 3205 final float viewportToContentVerticalOffset = 3206 mTextView.viewportToContentVerticalOffset(); 3207 3208 final CharSequence text = mTextView.getText(); 3209 if (text instanceof Spannable) { 3210 final Spannable sp = (Spannable) text; 3211 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3212 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3213 if (composingTextEnd < composingTextStart) { 3214 final int temp = composingTextEnd; 3215 composingTextEnd = composingTextStart; 3216 composingTextStart = temp; 3217 } 3218 final boolean hasComposingText = 3219 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3220 if (hasComposingText) { 3221 final CharSequence composingText = text.subSequence(composingTextStart, 3222 composingTextEnd); 3223 builder.setComposingText(composingTextStart, composingText); 3224 3225 final int minLine = layout.getLineForOffset(composingTextStart); 3226 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3227 for (int line = minLine; line <= maxLine; ++line) { 3228 final int lineStart = layout.getLineStart(line); 3229 final int lineEnd = layout.getLineEnd(line); 3230 final int offsetStart = Math.max(lineStart, composingTextStart); 3231 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3232 final boolean ltrLine = 3233 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3234 final float[] widths = new float[offsetEnd - offsetStart]; 3235 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3236 final float top = layout.getLineTop(line); 3237 final float bottom = layout.getLineBottom(line); 3238 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3239 final float charWidth = widths[offset - offsetStart]; 3240 final boolean isRtl = layout.isRtlCharAt(offset); 3241 final float primary = layout.getPrimaryHorizontal(offset); 3242 final float secondary = layout.getSecondaryHorizontal(offset); 3243 // TODO: This doesn't work perfectly for text with custom styles and 3244 // TAB chars. 3245 final float left; 3246 final float right; 3247 if (ltrLine) { 3248 if (isRtl) { 3249 left = secondary - charWidth; 3250 right = secondary; 3251 } else { 3252 left = primary; 3253 right = primary + charWidth; 3254 } 3255 } else { 3256 if (!isRtl) { 3257 left = secondary; 3258 right = secondary + charWidth; 3259 } else { 3260 left = primary - charWidth; 3261 right = primary; 3262 } 3263 } 3264 // TODO: Check top-right and bottom-left as well. 3265 final float localLeft = left + viewportToContentHorizontalOffset; 3266 final float localRight = right + viewportToContentHorizontalOffset; 3267 final float localTop = top + viewportToContentVerticalOffset; 3268 final float localBottom = bottom + viewportToContentVerticalOffset; 3269 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3270 final boolean isBottomRightVisible = 3271 isPositionVisible(localRight, localBottom); 3272 int characterBoundsFlags = 0; 3273 if (isTopLeftVisible || isBottomRightVisible) { 3274 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3275 } 3276 if (!isTopLeftVisible || !isTopLeftVisible) { 3277 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3278 } 3279 if (isRtl) { 3280 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3281 } 3282 // Here offset is the index in Java chars. 3283 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3284 localBottom, characterBoundsFlags); 3285 } 3286 } 3287 } 3288 } 3289 3290 // Treat selectionStart as the insertion point. 3291 if (0 <= selectionStart) { 3292 final int offset = selectionStart; 3293 final int line = layout.getLineForOffset(offset); 3294 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3295 + viewportToContentHorizontalOffset; 3296 final float insertionMarkerTop = layout.getLineTop(line) 3297 + viewportToContentVerticalOffset; 3298 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3299 + viewportToContentVerticalOffset; 3300 final float insertionMarkerBottom = layout.getLineBottom(line) 3301 + viewportToContentVerticalOffset; 3302 final boolean isTopVisible = 3303 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3304 final boolean isBottomVisible = 3305 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3306 int insertionMarkerFlags = 0; 3307 if (isTopVisible || isBottomVisible) { 3308 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3309 } 3310 if (!isTopVisible || !isBottomVisible) { 3311 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3312 } 3313 if (layout.isRtlCharAt(offset)) { 3314 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3315 } 3316 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3317 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3318 } 3319 3320 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3321 } 3322 } 3323 3324 private abstract class HandleView extends View implements TextViewPositionListener { 3325 protected Drawable mDrawable; 3326 protected Drawable mDrawableLtr; 3327 protected Drawable mDrawableRtl; 3328 private final PopupWindow mContainer; 3329 // Position with respect to the parent TextView 3330 private int mPositionX, mPositionY; 3331 private boolean mIsDragging; 3332 // Offset from touch position to mPosition 3333 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3334 protected int mHotspotX; 3335 protected int mHorizontalGravity; 3336 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3337 private float mTouchOffsetY; 3338 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3339 private float mIdealVerticalOffset; 3340 // Parent's (TextView) previous position in window 3341 private int mLastParentX, mLastParentY; 3342 // Transient action popup window for Paste and Replace actions 3343 protected ActionPopupWindow mActionPopupWindow; 3344 // Previous text character offset 3345 private int mPreviousOffset = -1; 3346 // Previous text character offset 3347 private boolean mPositionHasChanged = true; 3348 // Used to delay the appearance of the action popup window 3349 private Runnable mActionPopupShower; 3350 // Minimum touch target size for handles 3351 private int mMinSize; 3352 // Indicates the line of text that the handle is on. 3353 protected int mLine = -1; 3354 3355 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3356 super(mTextView.getContext()); 3357 mContainer = new PopupWindow(mTextView.getContext(), null, 3358 com.android.internal.R.attr.textSelectHandleWindowStyle); 3359 mContainer.setSplitTouchEnabled(true); 3360 mContainer.setClippingEnabled(false); 3361 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3362 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3363 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3364 mContainer.setContentView(this); 3365 3366 mDrawableLtr = drawableLtr; 3367 mDrawableRtl = drawableRtl; 3368 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3369 com.android.internal.R.dimen.text_handle_min_size); 3370 3371 updateDrawable(); 3372 3373 final int handleHeight = getPreferredHeight(); 3374 mTouchOffsetY = -0.3f * handleHeight; 3375 mIdealVerticalOffset = 0.7f * handleHeight; 3376 } 3377 3378 protected void updateDrawable() { 3379 final int offset = getCurrentCursorOffset(); 3380 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3381 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3382 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3383 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3384 } 3385 3386 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3387 protected abstract int getHorizontalGravity(boolean isRtlRun); 3388 3389 // Touch-up filter: number of previous positions remembered 3390 private static final int HISTORY_SIZE = 5; 3391 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3392 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3393 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3394 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3395 private int mPreviousOffsetIndex = 0; 3396 private int mNumberPreviousOffsets = 0; 3397 3398 private void startTouchUpFilter(int offset) { 3399 mNumberPreviousOffsets = 0; 3400 addPositionToTouchUpFilter(offset); 3401 } 3402 3403 private void addPositionToTouchUpFilter(int offset) { 3404 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3405 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3406 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3407 mNumberPreviousOffsets++; 3408 } 3409 3410 private void filterOnTouchUp() { 3411 final long now = SystemClock.uptimeMillis(); 3412 int i = 0; 3413 int index = mPreviousOffsetIndex; 3414 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3415 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3416 i++; 3417 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3418 } 3419 3420 if (i > 0 && i < iMax && 3421 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3422 positionAtCursorOffset(mPreviousOffsets[index], false); 3423 } 3424 } 3425 3426 public boolean offsetHasBeenChanged() { 3427 return mNumberPreviousOffsets > 1; 3428 } 3429 3430 @Override 3431 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3432 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3433 } 3434 3435 private int getPreferredWidth() { 3436 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3437 } 3438 3439 private int getPreferredHeight() { 3440 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3441 } 3442 3443 public void show() { 3444 if (isShowing()) return; 3445 3446 getPositionListener().addSubscriber(this, true /* local position may change */); 3447 3448 // Make sure the offset is always considered new, even when focusing at same position 3449 mPreviousOffset = -1; 3450 positionAtCursorOffset(getCurrentCursorOffset(), false); 3451 3452 hideActionPopupWindow(); 3453 } 3454 3455 protected void dismiss() { 3456 mIsDragging = false; 3457 mContainer.dismiss(); 3458 onDetached(); 3459 } 3460 3461 public void hide() { 3462 dismiss(); 3463 3464 getPositionListener().removeSubscriber(this); 3465 } 3466 3467 void showActionPopupWindow(int delay) { 3468 if (mActionPopupWindow == null) { 3469 mActionPopupWindow = new ActionPopupWindow(); 3470 } 3471 if (mActionPopupShower == null) { 3472 mActionPopupShower = new Runnable() { 3473 public void run() { 3474 mActionPopupWindow.show(); 3475 } 3476 }; 3477 } else { 3478 mTextView.removeCallbacks(mActionPopupShower); 3479 } 3480 mTextView.postDelayed(mActionPopupShower, delay); 3481 } 3482 3483 protected void hideActionPopupWindow() { 3484 if (mActionPopupShower != null) { 3485 mTextView.removeCallbacks(mActionPopupShower); 3486 } 3487 if (mActionPopupWindow != null) { 3488 mActionPopupWindow.hide(); 3489 } 3490 } 3491 3492 public boolean isShowing() { 3493 return mContainer.isShowing(); 3494 } 3495 3496 private boolean isVisible() { 3497 // Always show a dragging handle. 3498 if (mIsDragging) { 3499 return true; 3500 } 3501 3502 if (mTextView.isInBatchEditMode()) { 3503 return false; 3504 } 3505 3506 return isPositionVisible(mPositionX + mHotspotX, mPositionY); 3507 } 3508 3509 public abstract int getCurrentCursorOffset(); 3510 3511 protected abstract void updateSelection(int offset); 3512 3513 public abstract void updatePosition(float x, float y); 3514 3515 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3516 // A HandleView relies on the layout, which may be nulled by external methods 3517 Layout layout = mTextView.getLayout(); 3518 if (layout == null) { 3519 // Will update controllers' state, hiding them and stopping selection mode if needed 3520 prepareCursorControllers(); 3521 return; 3522 } 3523 3524 boolean offsetChanged = offset != mPreviousOffset; 3525 if (offsetChanged || parentScrolled) { 3526 if (offsetChanged) { 3527 updateSelection(offset); 3528 addPositionToTouchUpFilter(offset); 3529 } 3530 final int line = layout.getLineForOffset(offset); 3531 mLine = line; 3532 3533 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3534 getHorizontalOffset() + getCursorOffset()); 3535 mPositionY = layout.getLineBottom(line); 3536 3537 // Take TextView's padding and scroll into account. 3538 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3539 mPositionY += mTextView.viewportToContentVerticalOffset(); 3540 3541 mPreviousOffset = offset; 3542 mPositionHasChanged = true; 3543 } 3544 } 3545 3546 public void updatePosition(int parentPositionX, int parentPositionY, 3547 boolean parentPositionChanged, boolean parentScrolled) { 3548 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3549 if (parentPositionChanged || mPositionHasChanged) { 3550 if (mIsDragging) { 3551 // Update touchToWindow offset in case of parent scrolling while dragging 3552 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3553 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3554 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3555 mLastParentX = parentPositionX; 3556 mLastParentY = parentPositionY; 3557 } 3558 3559 onHandleMoved(); 3560 } 3561 3562 if (isVisible()) { 3563 final int positionX = parentPositionX + mPositionX; 3564 final int positionY = parentPositionY + mPositionY; 3565 if (isShowing()) { 3566 mContainer.update(positionX, positionY, -1, -1); 3567 } else { 3568 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3569 positionX, positionY); 3570 } 3571 } else { 3572 if (isShowing()) { 3573 dismiss(); 3574 } 3575 } 3576 3577 mPositionHasChanged = false; 3578 } 3579 } 3580 3581 public void showAtLocation(int offset) { 3582 // TODO - investigate if there's a better way to show the handles 3583 // after the drag accelerator has occured. 3584 int[] tmpCords = new int[2]; 3585 mTextView.getLocationInWindow(tmpCords); 3586 3587 Layout layout = mTextView.getLayout(); 3588 int posX = tmpCords[0]; 3589 int posY = tmpCords[1]; 3590 3591 final int line = layout.getLineForOffset(offset); 3592 3593 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3594 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3595 int startY = layout.getLineBottom(line); 3596 3597 // Take TextView's padding and scroll into account. 3598 startX += mTextView.viewportToContentHorizontalOffset(); 3599 startY += mTextView.viewportToContentVerticalOffset(); 3600 3601 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3602 startX + posX, startY + posY); 3603 } 3604 3605 @Override 3606 protected void onDraw(Canvas c) { 3607 final int drawWidth = mDrawable.getIntrinsicWidth(); 3608 final int left = getHorizontalOffset(); 3609 3610 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3611 mDrawable.draw(c); 3612 } 3613 3614 private int getHorizontalOffset() { 3615 final int width = getPreferredWidth(); 3616 final int drawWidth = mDrawable.getIntrinsicWidth(); 3617 final int left; 3618 switch (mHorizontalGravity) { 3619 case Gravity.LEFT: 3620 left = 0; 3621 break; 3622 default: 3623 case Gravity.CENTER: 3624 left = (width - drawWidth) / 2; 3625 break; 3626 case Gravity.RIGHT: 3627 left = width - drawWidth; 3628 break; 3629 } 3630 return left; 3631 } 3632 3633 protected int getCursorOffset() { 3634 return 0; 3635 } 3636 3637 @Override 3638 public boolean onTouchEvent(MotionEvent ev) { 3639 switch (ev.getActionMasked()) { 3640 case MotionEvent.ACTION_DOWN: { 3641 startTouchUpFilter(getCurrentCursorOffset()); 3642 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3643 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3644 3645 final PositionListener positionListener = getPositionListener(); 3646 mLastParentX = positionListener.getPositionX(); 3647 mLastParentY = positionListener.getPositionY(); 3648 mIsDragging = true; 3649 break; 3650 } 3651 3652 case MotionEvent.ACTION_MOVE: { 3653 final float rawX = ev.getRawX(); 3654 final float rawY = ev.getRawY(); 3655 3656 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3657 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3658 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3659 float newVerticalOffset; 3660 if (previousVerticalOffset < mIdealVerticalOffset) { 3661 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3662 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3663 } else { 3664 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3665 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3666 } 3667 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3668 3669 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3670 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3671 3672 updatePosition(newPosX, newPosY); 3673 break; 3674 } 3675 3676 case MotionEvent.ACTION_UP: 3677 filterOnTouchUp(); 3678 mIsDragging = false; 3679 break; 3680 3681 case MotionEvent.ACTION_CANCEL: 3682 mIsDragging = false; 3683 break; 3684 } 3685 return true; 3686 } 3687 3688 public boolean isDragging() { 3689 return mIsDragging; 3690 } 3691 3692 void onHandleMoved() { 3693 hideActionPopupWindow(); 3694 } 3695 3696 public void onDetached() { 3697 hideActionPopupWindow(); 3698 } 3699 } 3700 3701 private class InsertionHandleView extends HandleView { 3702 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3703 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3704 3705 // Used to detect taps on the insertion handle, which will affect the selection action mode 3706 private float mDownPositionX, mDownPositionY; 3707 private Runnable mHider; 3708 3709 public InsertionHandleView(Drawable drawable) { 3710 super(drawable, drawable); 3711 } 3712 3713 @Override 3714 public void show() { 3715 super.show(); 3716 3717 final long durationSinceCutOrCopy = 3718 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3719 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3720 startSelectionActionModeWithoutSelection(); 3721 } 3722 3723 hideAfterDelay(); 3724 } 3725 3726 private void hideAfterDelay() { 3727 if (mHider == null) { 3728 mHider = new Runnable() { 3729 public void run() { 3730 hide(); 3731 } 3732 }; 3733 } else { 3734 removeHiderCallback(); 3735 } 3736 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3737 } 3738 3739 private void removeHiderCallback() { 3740 if (mHider != null) { 3741 mTextView.removeCallbacks(mHider); 3742 } 3743 } 3744 3745 @Override 3746 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3747 return drawable.getIntrinsicWidth() / 2; 3748 } 3749 3750 @Override 3751 protected int getHorizontalGravity(boolean isRtlRun) { 3752 return Gravity.CENTER_HORIZONTAL; 3753 } 3754 3755 @Override 3756 protected int getCursorOffset() { 3757 int offset = super.getCursorOffset(); 3758 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3759 if (cursor != null) { 3760 cursor.getPadding(mTempRect); 3761 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3762 } 3763 return offset; 3764 } 3765 3766 @Override 3767 public boolean onTouchEvent(MotionEvent ev) { 3768 final boolean result = super.onTouchEvent(ev); 3769 3770 switch (ev.getActionMasked()) { 3771 case MotionEvent.ACTION_DOWN: 3772 mDownPositionX = ev.getRawX(); 3773 mDownPositionY = ev.getRawY(); 3774 break; 3775 3776 case MotionEvent.ACTION_UP: 3777 if (!offsetHasBeenChanged()) { 3778 final float deltaX = mDownPositionX - ev.getRawX(); 3779 final float deltaY = mDownPositionY - ev.getRawY(); 3780 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3781 3782 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3783 mTextView.getContext()); 3784 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3785 3786 if (distanceSquared < touchSlop * touchSlop) { 3787 // Tapping on the handle toggles the selection action mode. 3788 if (mSelectionActionMode != null) { 3789 mSelectionActionMode.finish(); 3790 } else { 3791 startSelectionActionModeWithoutSelection(); 3792 } 3793 } 3794 } 3795 hideAfterDelay(); 3796 break; 3797 3798 case MotionEvent.ACTION_CANCEL: 3799 hideAfterDelay(); 3800 break; 3801 3802 default: 3803 break; 3804 } 3805 3806 return result; 3807 } 3808 3809 @Override 3810 public int getCurrentCursorOffset() { 3811 return mTextView.getSelectionStart(); 3812 } 3813 3814 @Override 3815 public void updateSelection(int offset) { 3816 Selection.setSelection((Spannable) mTextView.getText(), offset); 3817 } 3818 3819 @Override 3820 public void updatePosition(float x, float y) { 3821 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3822 } 3823 3824 @Override 3825 void onHandleMoved() { 3826 super.onHandleMoved(); 3827 removeHiderCallback(); 3828 } 3829 3830 @Override 3831 public void onDetached() { 3832 super.onDetached(); 3833 removeHiderCallback(); 3834 } 3835 } 3836 3837 private class SelectionStartHandleView extends HandleView { 3838 // The previous offset this handle was at. 3839 private int mPrevOffset; 3840 // Indicates whether the cursor is making adjustments within a word. 3841 private boolean mInWord = false; 3842 // Offset to track difference between touch and word boundary. 3843 protected int mTouchWordOffset; 3844 3845 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3846 super(drawableLtr, drawableRtl); 3847 } 3848 3849 @Override 3850 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3851 return isRtlRun ? 0 : drawable.getIntrinsicWidth(); 3852 } 3853 3854 @Override 3855 protected int getHorizontalGravity(boolean isRtlRun) { 3856 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 3857 } 3858 3859 @Override 3860 public int getCurrentCursorOffset() { 3861 return mTextView.getSelectionStart(); 3862 } 3863 3864 @Override 3865 public void updateSelection(int offset) { 3866 Selection.setSelection((Spannable) mTextView.getText(), offset, 3867 mTextView.getSelectionEnd()); 3868 updateDrawable(); 3869 } 3870 3871 @Override 3872 public void updatePosition(float x, float y) { 3873 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3874 final int currLine = mTextView.getLineAtCoordinate(y); 3875 int offset = trueOffset; 3876 boolean positionCursor = false; 3877 3878 int end = getWordEnd(offset, true); 3879 int start = getWordStart(offset); 3880 3881 if (offset < mPrevOffset) { 3882 // User is increasing the selection. 3883 if (!mInWord || currLine < mLine) { 3884 // We're not in a word, or we're on a different line so we'll expand by 3885 // word. First ensure the user has at least entered the next word. 3886 int offsetToWord = Math.min((end - start) / 2, 2); 3887 if (offset <= end - offsetToWord || currLine < mLine) { 3888 offset = start; 3889 } else { 3890 offset = mPrevOffset; 3891 } 3892 } 3893 mPrevOffset = offset; 3894 mTouchWordOffset = Math.max(trueOffset - offset, 0); 3895 mInWord = !isStartBoundary(offset); 3896 positionCursor = true; 3897 } else if (offset - mTouchWordOffset > mPrevOffset) { 3898 // User is shrinking the selection. 3899 if (currLine > mLine) { 3900 // We're on a different line, so we'll snap to word boundaries. 3901 offset = end; 3902 } 3903 offset -= mTouchWordOffset; 3904 mPrevOffset = offset; 3905 mInWord = !isEndBoundary(offset); 3906 positionCursor = true; 3907 } 3908 3909 // Handles can not cross and selection is at least one character. 3910 if (positionCursor) { 3911 final int selectionEnd = mTextView.getSelectionEnd(); 3912 if (offset >= selectionEnd) { 3913 // We can't cross the handles so let's just constrain the Y value. 3914 int alteredOffset = mTextView.getOffsetAtCoordinate(mLine, x); 3915 if (alteredOffset >= selectionEnd) { 3916 // Can't pass the other drag handle. 3917 offset = Math.max(0, selectionEnd - 1); 3918 } else { 3919 offset = alteredOffset; 3920 } 3921 } 3922 positionAtCursorOffset(offset, false); 3923 } 3924 } 3925 3926 public ActionPopupWindow getActionPopupWindow() { 3927 return mActionPopupWindow; 3928 } 3929 3930 @Override 3931 public boolean onTouchEvent(MotionEvent event) { 3932 boolean superResult = super.onTouchEvent(event); 3933 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 3934 // Reset the touch word offset when the user has lifted their finger. 3935 mTouchWordOffset = 0; 3936 } 3937 return superResult; 3938 } 3939 } 3940 3941 private class SelectionEndHandleView extends HandleView { 3942 // The previous offset this handle was at. 3943 private int mPrevOffset; 3944 // Indicates whether the cursor is making adjustments within a word. 3945 private boolean mInWord = false; 3946 // Offset to track difference between touch and word boundary. 3947 protected int mTouchWordOffset; 3948 3949 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3950 super(drawableLtr, drawableRtl); 3951 } 3952 3953 @Override 3954 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3955 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 3956 } 3957 3958 @Override 3959 protected int getHorizontalGravity(boolean isRtlRun) { 3960 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 3961 } 3962 3963 @Override 3964 public int getCurrentCursorOffset() { 3965 return mTextView.getSelectionEnd(); 3966 } 3967 3968 @Override 3969 public void updateSelection(int offset) { 3970 Selection.setSelection((Spannable) mTextView.getText(), 3971 mTextView.getSelectionStart(), offset); 3972 updateDrawable(); 3973 } 3974 3975 @Override 3976 public void updatePosition(float x, float y) { 3977 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3978 final int currLine = mTextView.getLineAtCoordinate(y); 3979 int offset = trueOffset; 3980 boolean positionCursor = false; 3981 3982 int end = getWordEnd(offset, true); 3983 int start = getWordStart(offset); 3984 3985 if (offset > mPrevOffset) { 3986 // User is increasing the selection. 3987 if (!mInWord || currLine > mLine) { 3988 // We're not in a word, or we're on a different line so we'll expand by 3989 // word. First ensure the user has at least entered the next word. 3990 int midPoint = Math.min((end - start) / 2, 2); 3991 if (offset >= start + midPoint || currLine > mLine) { 3992 offset = end; 3993 } else { 3994 offset = mPrevOffset; 3995 } 3996 } 3997 mPrevOffset = offset; 3998 mTouchWordOffset = Math.max(offset - trueOffset, 0); 3999 mInWord = !isEndBoundary(offset); 4000 positionCursor = true; 4001 } else if (offset + mTouchWordOffset < mPrevOffset) { 4002 // User is shrinking the selection. 4003 if (currLine > mLine) { 4004 // We're on a different line, so we'll snap to word boundaries. 4005 offset = getWordStart(offset); 4006 } 4007 offset += mTouchWordOffset; 4008 mPrevOffset = offset; 4009 positionCursor = true; 4010 mInWord = !isStartBoundary(offset); 4011 } 4012 4013 if (positionCursor) { 4014 final int selectionStart = mTextView.getSelectionStart(); 4015 if (offset <= selectionStart) { 4016 // We can't cross the handles so let's just constrain the Y value. 4017 int alteredOffset = mTextView.getOffsetAtCoordinate(mLine, x); 4018 int length = mTextView.getText().length(); 4019 if (alteredOffset <= selectionStart) { 4020 // Can't pass the other drag handle. 4021 offset = Math.min(selectionStart + 1, length); 4022 } else { 4023 offset = Math.min(alteredOffset, length); 4024 } 4025 } 4026 positionAtCursorOffset(offset, false); 4027 } 4028 } 4029 4030 public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) { 4031 mActionPopupWindow = actionPopupWindow; 4032 } 4033 4034 @Override 4035 public boolean onTouchEvent(MotionEvent event) { 4036 boolean superResult = super.onTouchEvent(event); 4037 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4038 // Reset the touch word offset when the user has lifted their finger. 4039 mTouchWordOffset = 0; 4040 } 4041 return superResult; 4042 } 4043 } 4044 4045 /** 4046 * A CursorController instance can be used to control a cursor in the text. 4047 */ 4048 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4049 /** 4050 * Makes the cursor controller visible on screen. 4051 * See also {@link #hide()}. 4052 */ 4053 public void show(); 4054 4055 /** 4056 * Hide the cursor controller from screen. 4057 * See also {@link #show()}. 4058 */ 4059 public void hide(); 4060 4061 /** 4062 * Called when the view is detached from window. Perform house keeping task, such as 4063 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4064 * preventing the activity from being recycled. 4065 */ 4066 public void onDetached(); 4067 } 4068 4069 private class InsertionPointCursorController implements CursorController { 4070 private InsertionHandleView mHandle; 4071 4072 public void show() { 4073 getHandle().show(); 4074 } 4075 4076 public void hide() { 4077 if (mHandle != null) { 4078 mHandle.hide(); 4079 } 4080 } 4081 4082 public void onTouchModeChanged(boolean isInTouchMode) { 4083 if (!isInTouchMode) { 4084 hide(); 4085 } 4086 } 4087 4088 private InsertionHandleView getHandle() { 4089 if (mSelectHandleCenter == null) { 4090 mSelectHandleCenter = mTextView.getContext().getDrawable( 4091 mTextView.mTextSelectHandleRes); 4092 } 4093 if (mHandle == null) { 4094 mHandle = new InsertionHandleView(mSelectHandleCenter); 4095 } 4096 return mHandle; 4097 } 4098 4099 @Override 4100 public void onDetached() { 4101 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4102 observer.removeOnTouchModeChangeListener(this); 4103 4104 if (mHandle != null) mHandle.onDetached(); 4105 } 4106 } 4107 4108 class SelectionModifierCursorController implements CursorController { 4109 private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds 4110 // The cursor controller handles, lazily created when shown. 4111 private SelectionStartHandleView mStartHandle; 4112 private SelectionEndHandleView mEndHandle; 4113 // The offsets of that last touch down event. Remembered to start selection there. 4114 private int mMinTouchOffset, mMaxTouchOffset; 4115 4116 // Double tap detection 4117 private long mPreviousTapUpTime = 0; 4118 private float mDownPositionX, mDownPositionY; 4119 private boolean mGestureStayedInTapRegion; 4120 4121 // Where the user first starts the drag motion. 4122 private int mStartOffset = -1; 4123 // Indicates whether the user is selecting text and using the drag accelerator. 4124 private boolean mDragAcceleratorActive; 4125 4126 SelectionModifierCursorController() { 4127 resetTouchOffsets(); 4128 } 4129 4130 public void show() { 4131 if (mTextView.isInBatchEditMode()) { 4132 return; 4133 } 4134 initDrawables(); 4135 initHandles(); 4136 hideInsertionPointCursorController(); 4137 } 4138 4139 private void initDrawables() { 4140 if (mSelectHandleLeft == null) { 4141 mSelectHandleLeft = mTextView.getContext().getDrawable( 4142 mTextView.mTextSelectHandleLeftRes); 4143 } 4144 if (mSelectHandleRight == null) { 4145 mSelectHandleRight = mTextView.getContext().getDrawable( 4146 mTextView.mTextSelectHandleRightRes); 4147 } 4148 } 4149 4150 private void initHandles() { 4151 // Lazy object creation has to be done before updatePosition() is called. 4152 if (mStartHandle == null) { 4153 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4154 } 4155 if (mEndHandle == null) { 4156 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4157 } 4158 4159 mStartHandle.show(); 4160 mEndHandle.show(); 4161 4162 // Make sure both left and right handles share the same ActionPopupWindow (so that 4163 // moving any of the handles hides the action popup). 4164 mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION); 4165 mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow()); 4166 4167 hideInsertionPointCursorController(); 4168 } 4169 4170 public void hide() { 4171 if (mStartHandle != null) mStartHandle.hide(); 4172 if (mEndHandle != null) mEndHandle.hide(); 4173 } 4174 4175 public void enterDrag() { 4176 // Just need to init the handles / hide insertion cursor. 4177 show(); 4178 mDragAcceleratorActive = true; 4179 // Start location of selection. 4180 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4181 mLastDownPositionY); 4182 // Don't show the handles until user has lifted finger. 4183 hide(); 4184 4185 // This stops scrolling parents from intercepting the touch event, allowing 4186 // the user to continue dragging across the screen to select text; TextView will 4187 // scroll as necessary. 4188 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4189 } 4190 4191 public void onTouchEvent(MotionEvent event) { 4192 // This is done even when the View does not have focus, so that long presses can start 4193 // selection and tap can move cursor from this tap position. 4194 switch (event.getActionMasked()) { 4195 case MotionEvent.ACTION_DOWN: 4196 final float x = event.getX(); 4197 final float y = event.getY(); 4198 4199 // Remember finger down position, to be able to start selection from there. 4200 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4201 4202 // Double tap detection 4203 if (mGestureStayedInTapRegion) { 4204 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 4205 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 4206 final float deltaX = x - mDownPositionX; 4207 final float deltaY = y - mDownPositionY; 4208 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4209 4210 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4211 mTextView.getContext()); 4212 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4213 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4214 4215 if (stayedInArea && isPositionOnText(x, y)) { 4216 startSelectionActionModeWithSelection(); 4217 mDiscardNextActionUp = true; 4218 } 4219 } 4220 } 4221 4222 mDownPositionX = x; 4223 mDownPositionY = y; 4224 mGestureStayedInTapRegion = true; 4225 break; 4226 4227 case MotionEvent.ACTION_POINTER_DOWN: 4228 case MotionEvent.ACTION_POINTER_UP: 4229 // Handle multi-point gestures. Keep min and max offset positions. 4230 // Only activated for devices that correctly handle multi-touch. 4231 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4232 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4233 updateMinAndMaxOffsets(event); 4234 } 4235 break; 4236 4237 case MotionEvent.ACTION_MOVE: 4238 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4239 mTextView.getContext()); 4240 4241 if (mGestureStayedInTapRegion) { 4242 final float deltaX = event.getX() - mDownPositionX; 4243 final float deltaY = event.getY() - mDownPositionY; 4244 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4245 4246 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4247 4248 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4249 mGestureStayedInTapRegion = false; 4250 } 4251 } 4252 4253 if (mStartHandle != null && mStartHandle.isShowing()) { 4254 // Don't do the drag if the handles are showing already. 4255 break; 4256 } 4257 4258 if (mStartOffset != -1) { 4259 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4260 event.getY()); 4261 int offset = rawOffset; 4262 4263 // We don't start "dragging" until the user is past the initial word that 4264 // gets selected on long press. 4265 int firstWordStart = getWordStart(mStartOffset); 4266 int firstWordEnd = getWordEnd(mStartOffset, false); 4267 if (offset > firstWordEnd || offset < firstWordStart) { 4268 4269 // Basically the goal in the below code is to have the highlight be 4270 // offset so that your finger isn't covering the end point. 4271 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4272 float mx = event.getX(); 4273 float my = event.getY(); 4274 if (mx > fingerOffset) mx -= fingerOffset; 4275 if (my > fingerOffset) my -= fingerOffset; 4276 offset = mTextView.getOffsetForPosition(mx, my); 4277 4278 // Perform the check for closeness at edge of view, if we're very close 4279 // don't adjust the offset to be in front of the finger - otherwise the 4280 // user can't select words at the edge. 4281 if (mTextView.getWidth() - fingerOffset > mx) { 4282 // We're going by word, so we need to make sure that the offset 4283 // that we get is within this, so we'll get the previous boundary. 4284 final WordIterator wordIterator = getWordIteratorWithText(); 4285 4286 final int precedingOffset = wordIterator.preceding(offset); 4287 if (mStartOffset < offset) { 4288 // Expanding with bottom handle, in this case the selection end 4289 // is before the finger. 4290 offset = Math.max(precedingOffset - 1, 0); 4291 } else { 4292 // Expand with the start handle, in this case the selection 4293 // start is before the finger. 4294 if (precedingOffset == WordIterator.DONE) { 4295 offset = 0; 4296 } else { 4297 offset = wordIterator.preceding(precedingOffset); 4298 } 4299 } 4300 } 4301 if (offset == WordIterator.DONE) 4302 offset = rawOffset; 4303 4304 // Need to adjust start offset based on direction of movement. 4305 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4306 : getWordEnd(mStartOffset, true); 4307 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4308 offset); 4309 } 4310 } 4311 break; 4312 4313 case MotionEvent.ACTION_UP: 4314 mPreviousTapUpTime = SystemClock.uptimeMillis(); 4315 if (mDragAcceleratorActive) { 4316 // No longer dragging to select text, let the parent intercept events. 4317 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4318 4319 show(); 4320 int startOffset = mTextView.getSelectionStart(); 4321 int endOffset = mTextView.getSelectionEnd(); 4322 4323 // Since we don't let drag handles pass once they're visible, we need to 4324 // make sure the start / end locations are correct because the user *can* 4325 // switch directions during the initial drag. 4326 if (endOffset < startOffset) { 4327 int tmp = endOffset; 4328 endOffset = startOffset; 4329 startOffset = tmp; 4330 4331 // Also update the selection with the right offsets in this case. 4332 Selection.setSelection((Spannable) mTextView.getText(), 4333 startOffset, endOffset); 4334 } 4335 4336 // Need to do this to display the handles. 4337 mStartHandle.showAtLocation(startOffset); 4338 mEndHandle.showAtLocation(endOffset); 4339 4340 // No longer the first dragging motion, reset. 4341 mDragAcceleratorActive = false; 4342 mStartOffset = -1; 4343 } 4344 break; 4345 } 4346 } 4347 4348 /** 4349 * @param event 4350 */ 4351 private void updateMinAndMaxOffsets(MotionEvent event) { 4352 int pointerCount = event.getPointerCount(); 4353 for (int index = 0; index < pointerCount; index++) { 4354 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4355 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4356 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4357 } 4358 } 4359 4360 public int getMinTouchOffset() { 4361 return mMinTouchOffset; 4362 } 4363 4364 public int getMaxTouchOffset() { 4365 return mMaxTouchOffset; 4366 } 4367 4368 public void resetTouchOffsets() { 4369 mMinTouchOffset = mMaxTouchOffset = -1; 4370 mStartOffset = -1; 4371 mDragAcceleratorActive = false; 4372 } 4373 4374 /** 4375 * @return true iff this controller is currently used to move the selection start. 4376 */ 4377 public boolean isSelectionStartDragged() { 4378 return mStartHandle != null && mStartHandle.isDragging(); 4379 } 4380 4381 /** 4382 * @return true if the user is selecting text using the drag accelerator. 4383 */ 4384 public boolean isDragAcceleratorActive() { 4385 return mDragAcceleratorActive; 4386 } 4387 4388 public void onTouchModeChanged(boolean isInTouchMode) { 4389 if (!isInTouchMode) { 4390 hide(); 4391 } 4392 } 4393 4394 @Override 4395 public void onDetached() { 4396 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4397 observer.removeOnTouchModeChangeListener(this); 4398 4399 if (mStartHandle != null) mStartHandle.onDetached(); 4400 if (mEndHandle != null) mEndHandle.onDetached(); 4401 } 4402 } 4403 4404 private class CorrectionHighlighter { 4405 private final Path mPath = new Path(); 4406 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4407 private int mStart, mEnd; 4408 private long mFadingStartTime; 4409 private RectF mTempRectF; 4410 private final static int FADE_OUT_DURATION = 400; 4411 4412 public CorrectionHighlighter() { 4413 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4414 applicationScale); 4415 mPaint.setStyle(Paint.Style.FILL); 4416 } 4417 4418 public void highlight(CorrectionInfo info) { 4419 mStart = info.getOffset(); 4420 mEnd = mStart + info.getNewText().length(); 4421 mFadingStartTime = SystemClock.uptimeMillis(); 4422 4423 if (mStart < 0 || mEnd < 0) { 4424 stopAnimation(); 4425 } 4426 } 4427 4428 public void draw(Canvas canvas, int cursorOffsetVertical) { 4429 if (updatePath() && updatePaint()) { 4430 if (cursorOffsetVertical != 0) { 4431 canvas.translate(0, cursorOffsetVertical); 4432 } 4433 4434 canvas.drawPath(mPath, mPaint); 4435 4436 if (cursorOffsetVertical != 0) { 4437 canvas.translate(0, -cursorOffsetVertical); 4438 } 4439 invalidate(true); // TODO invalidate cursor region only 4440 } else { 4441 stopAnimation(); 4442 invalidate(false); // TODO invalidate cursor region only 4443 } 4444 } 4445 4446 private boolean updatePaint() { 4447 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4448 if (duration > FADE_OUT_DURATION) return false; 4449 4450 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4451 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4452 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4453 ((int) (highlightColorAlpha * coef) << 24); 4454 mPaint.setColor(color); 4455 return true; 4456 } 4457 4458 private boolean updatePath() { 4459 final Layout layout = mTextView.getLayout(); 4460 if (layout == null) return false; 4461 4462 // Update in case text is edited while the animation is run 4463 final int length = mTextView.getText().length(); 4464 int start = Math.min(length, mStart); 4465 int end = Math.min(length, mEnd); 4466 4467 mPath.reset(); 4468 layout.getSelectionPath(start, end, mPath); 4469 return true; 4470 } 4471 4472 private void invalidate(boolean delayed) { 4473 if (mTextView.getLayout() == null) return; 4474 4475 if (mTempRectF == null) mTempRectF = new RectF(); 4476 mPath.computeBounds(mTempRectF, false); 4477 4478 int left = mTextView.getCompoundPaddingLeft(); 4479 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4480 4481 if (delayed) { 4482 mTextView.postInvalidateOnAnimation( 4483 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4484 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4485 } else { 4486 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4487 (int) mTempRectF.right, (int) mTempRectF.bottom); 4488 } 4489 } 4490 4491 private void stopAnimation() { 4492 Editor.this.mCorrectionHighlighter = null; 4493 } 4494 } 4495 4496 private static class ErrorPopup extends PopupWindow { 4497 private boolean mAbove = false; 4498 private final TextView mView; 4499 private int mPopupInlineErrorBackgroundId = 0; 4500 private int mPopupInlineErrorAboveBackgroundId = 0; 4501 4502 ErrorPopup(TextView v, int width, int height) { 4503 super(v, width, height); 4504 mView = v; 4505 // Make sure the TextView has a background set as it will be used the first time it is 4506 // shown and positioned. Initialized with below background, which should have 4507 // dimensions identical to the above version for this to work (and is more likely). 4508 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4509 com.android.internal.R.styleable.Theme_errorMessageBackground); 4510 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4511 } 4512 4513 void fixDirection(boolean above) { 4514 mAbove = above; 4515 4516 if (above) { 4517 mPopupInlineErrorAboveBackgroundId = 4518 getResourceId(mPopupInlineErrorAboveBackgroundId, 4519 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4520 } else { 4521 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4522 com.android.internal.R.styleable.Theme_errorMessageBackground); 4523 } 4524 4525 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4526 mPopupInlineErrorBackgroundId); 4527 } 4528 4529 private int getResourceId(int currentId, int index) { 4530 if (currentId == 0) { 4531 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4532 R.styleable.Theme); 4533 currentId = styledAttributes.getResourceId(index, 0); 4534 styledAttributes.recycle(); 4535 } 4536 return currentId; 4537 } 4538 4539 @Override 4540 public void update(int x, int y, int w, int h, boolean force) { 4541 super.update(x, y, w, h, force); 4542 4543 boolean above = isAboveAnchor(); 4544 if (above != mAbove) { 4545 fixDirection(above); 4546 } 4547 } 4548 } 4549 4550 static class InputContentType { 4551 int imeOptions = EditorInfo.IME_NULL; 4552 String privateImeOptions; 4553 CharSequence imeActionLabel; 4554 int imeActionId; 4555 Bundle extras; 4556 OnEditorActionListener onEditorActionListener; 4557 boolean enterDown; 4558 } 4559 4560 static class InputMethodState { 4561 Rect mCursorRectInWindow = new Rect(); 4562 float[] mTmpOffset = new float[2]; 4563 ExtractedTextRequest mExtractedTextRequest; 4564 final ExtractedText mExtractedText = new ExtractedText(); 4565 int mBatchEditNesting; 4566 boolean mCursorChanged; 4567 boolean mSelectionModeChanged; 4568 boolean mContentChanged; 4569 int mChangedStart, mChangedEnd, mChangedDelta; 4570 } 4571 4572 /** 4573 * @return True iff (start, end) is a valid range within the text. 4574 */ 4575 private static boolean isValidRange(CharSequence text, int start, int end) { 4576 return 0 <= start && start <= end && end <= text.length(); 4577 } 4578 4579 /** 4580 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4581 * text being typed (and hence always returns null from the filter() method). 4582 */ 4583 public static class UndoInputFilter implements InputFilter { 4584 private final Editor mEditor; 4585 4586 // Whether the current filter pass is directly caused by an end-user text edit. 4587 private boolean mIsUserEdit; 4588 4589 // Whether the text field is handling an IME composition. Must be parceled in case the user 4590 // rotates the screen during composition. 4591 private boolean mHasComposition; 4592 4593 public UndoInputFilter(Editor editor) { 4594 mEditor = editor; 4595 } 4596 4597 public void saveInstanceState(Parcel parcel) { 4598 parcel.writeInt(mIsUserEdit ? 1 : 0); 4599 parcel.writeInt(mHasComposition ? 1 : 0); 4600 } 4601 4602 public void restoreInstanceState(Parcel parcel) { 4603 mIsUserEdit = parcel.readInt() != 0; 4604 mHasComposition = parcel.readInt() != 0; 4605 } 4606 4607 /** 4608 * Signals that a user-triggered edit is starting. 4609 */ 4610 public void beginBatchEdit() { 4611 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4612 mIsUserEdit = true; 4613 } 4614 4615 public void endBatchEdit() { 4616 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4617 mIsUserEdit = false; 4618 } 4619 4620 @Override 4621 public CharSequence filter(CharSequence source, int start, int end, 4622 Spanned dest, int dstart, int dend) { 4623 if (DEBUG_UNDO) { 4624 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4625 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4626 } 4627 4628 // Check to see if this edit should be tracked for undo. 4629 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4630 return null; 4631 } 4632 4633 // Check for and handle IME composition edits. 4634 if (handleCompositionEdit(source, start, end, dstart)) { 4635 return null; 4636 } 4637 4638 // Handle keyboard edits. 4639 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4640 return null; 4641 } 4642 4643 /** 4644 * Returns true iff the edit was handled, either because it should be ignored or because 4645 * this function created an undo operation for it. 4646 */ 4647 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4648 // Ignore edits while the user is composing. 4649 if (isComposition(source)) { 4650 mHasComposition = true; 4651 return true; 4652 } 4653 final boolean hadComposition = mHasComposition; 4654 mHasComposition = false; 4655 4656 // Check for the transition out of the composing state. 4657 if (hadComposition) { 4658 // If there was no text the user canceled composition. Ignore the edit. 4659 if (start == end) { 4660 return true; 4661 } 4662 4663 // Otherwise the user inserted the composition. 4664 String newText = TextUtils.substring(source, start, end); 4665 EditOperation edit = new EditOperation(mEditor, false, "", dstart, newText); 4666 recordEdit(edit); 4667 return true; 4668 } 4669 4670 // This was neither a composition event nor a transition out of composing. 4671 return false; 4672 } 4673 4674 private void handleKeyboardEdit(CharSequence source, int start, int end, 4675 Spanned dest, int dstart, int dend) { 4676 // An application may install a TextWatcher to provide additional modifications after 4677 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4678 // string). This results in multiple filter() calls for what the user considers to be 4679 // a single operation. Always undo the whole set of changes in one step. 4680 final boolean forceMerge = isInTextWatcher(); 4681 4682 // Build a new operation with all the information from this edit. 4683 String newText = TextUtils.substring(source, start, end); 4684 String oldText = TextUtils.substring(dest, dstart, dend); 4685 EditOperation edit = new EditOperation(mEditor, forceMerge, oldText, dstart, newText); 4686 recordEdit(edit); 4687 } 4688 4689 private void recordEdit(EditOperation edit) { 4690 // Fetch the last edit operation and attempt to merge in the new edit. 4691 final UndoManager um = mEditor.mUndoManager; 4692 um.beginUpdate("Edit text"); 4693 EditOperation lastEdit = um.getLastOperation( 4694 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4695 if (lastEdit == null) { 4696 // Add this as the first edit. 4697 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4698 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4699 } else if (!mIsUserEdit) { 4700 // An application directly modified the Editable outside of a text edit. Treat this 4701 // as a new change and don't attempt to merge. 4702 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4703 um.commitState(mEditor.mUndoOwner); 4704 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4705 } else if (lastEdit.mergeWith(edit)) { 4706 // Merge succeeded, nothing else to do. 4707 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4708 } else { 4709 // Could not merge with the last edit, so commit the last edit and add this edit. 4710 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4711 um.commitState(mEditor.mUndoOwner); 4712 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4713 } 4714 um.endUpdate(); 4715 } 4716 4717 private boolean canUndoEdit(CharSequence source, int start, int end, 4718 Spanned dest, int dstart, int dend) { 4719 if (!mEditor.mAllowUndo) { 4720 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4721 return false; 4722 } 4723 4724 if (mEditor.mUndoManager.isInUndo()) { 4725 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4726 return false; 4727 } 4728 4729 // Text filters run before input operations are applied. However, some input operations 4730 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4731 // attempt to undo invalid operations. 4732 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4733 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4734 return false; 4735 } 4736 4737 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4738 // on an input field. Skip no-op changes. 4739 if (start == end && dstart == dend) { 4740 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4741 return false; 4742 } 4743 4744 return true; 4745 } 4746 4747 private boolean isComposition(CharSequence source) { 4748 if (!(source instanceof Spannable)) { 4749 return false; 4750 } 4751 // This is a composition edit if the source has a non-zero-length composing span. 4752 Spannable text = (Spannable) source; 4753 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4754 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4755 return composeBegin < composeEnd; 4756 } 4757 4758 private boolean isInTextWatcher() { 4759 CharSequence text = mEditor.mTextView.getText(); 4760 return (text instanceof SpannableStringBuilder) 4761 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4762 } 4763 } 4764 4765 /** 4766 * An operation to undo a single "edit" to a text view. 4767 */ 4768 public static class EditOperation extends UndoOperation<Editor> { 4769 private static final int TYPE_INSERT = 0; 4770 private static final int TYPE_DELETE = 1; 4771 private static final int TYPE_REPLACE = 2; 4772 4773 private int mType; 4774 private boolean mForceMerge; 4775 private String mOldText; 4776 private int mOldTextStart; 4777 private String mNewText; 4778 private int mNewTextStart; 4779 4780 private int mOldCursorPos; 4781 private int mNewCursorPos; 4782 4783 /** 4784 * Constructs an edit operation from a text input operation on editor that replaces the 4785 * oldText starting at dstart with newText. If forceMerge is true then always forcibly 4786 * merge this operation with any previous one. 4787 */ 4788 public EditOperation(Editor editor, boolean forceMerge, String oldText, int dstart, 4789 String newText) { 4790 super(editor.mUndoOwner); 4791 mForceMerge = forceMerge; 4792 mOldText = oldText; 4793 mNewText = newText; 4794 4795 // Determine the type of the edit and store where it occurred. Avoid storing 4796 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4797 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4798 // outside the bounds of the final text). 4799 if (mNewText.length() > 0 && mOldText.length() == 0) { 4800 mType = TYPE_INSERT; 4801 mNewTextStart = dstart; 4802 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4803 mType = TYPE_DELETE; 4804 mOldTextStart = dstart; 4805 } else { 4806 mType = TYPE_REPLACE; 4807 mOldTextStart = mNewTextStart = dstart; 4808 } 4809 4810 // Store cursor data. 4811 mOldCursorPos = editor.mTextView.getSelectionStart(); 4812 mNewCursorPos = dstart + mNewText.length(); 4813 } 4814 4815 public EditOperation(Parcel src, ClassLoader loader) { 4816 super(src, loader); 4817 mType = src.readInt(); 4818 mForceMerge = src.readInt() != 0; 4819 mOldText = src.readString(); 4820 mOldTextStart = src.readInt(); 4821 mNewText = src.readString(); 4822 mNewTextStart = src.readInt(); 4823 mOldCursorPos = src.readInt(); 4824 mNewCursorPos = src.readInt(); 4825 } 4826 4827 @Override 4828 public void writeToParcel(Parcel dest, int flags) { 4829 dest.writeInt(mType); 4830 dest.writeInt(mForceMerge ? 1 : 0); 4831 dest.writeString(mOldText); 4832 dest.writeInt(mOldTextStart); 4833 dest.writeString(mNewText); 4834 dest.writeInt(mNewTextStart); 4835 dest.writeInt(mOldCursorPos); 4836 dest.writeInt(mNewCursorPos); 4837 } 4838 4839 private int getNewTextEnd() { 4840 return mNewTextStart + mNewText.length(); 4841 } 4842 4843 private int getOldTextEnd() { 4844 return mOldTextStart + mOldText.length(); 4845 } 4846 4847 @Override 4848 public void commit() { 4849 } 4850 4851 @Override 4852 public void undo() { 4853 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4854 // Remove the new text and insert the old. 4855 Editor editor = getOwnerData(); 4856 Editable text = (Editable) editor.mTextView.getText(); 4857 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4858 mOldCursorPos); 4859 } 4860 4861 @Override 4862 public void redo() { 4863 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4864 // Remove the old text and insert the new. 4865 Editor editor = getOwnerData(); 4866 Editable text = (Editable) editor.mTextView.getText(); 4867 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4868 mNewCursorPos); 4869 } 4870 4871 /** 4872 * Attempts to merge this existing operation with a new edit. 4873 * @param edit The new edit operation. 4874 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4875 * object unchanged. 4876 */ 4877 private boolean mergeWith(EditOperation edit) { 4878 if (DEBUG_UNDO) { 4879 Log.d(TAG, "mergeWith old " + this); 4880 Log.d(TAG, "mergeWith new " + edit); 4881 } 4882 if (edit.mForceMerge) { 4883 forceMergeWith(edit); 4884 return true; 4885 } 4886 switch (mType) { 4887 case TYPE_INSERT: 4888 return mergeInsertWith(edit); 4889 case TYPE_DELETE: 4890 return mergeDeleteWith(edit); 4891 case TYPE_REPLACE: 4892 return mergeReplaceWith(edit); 4893 default: 4894 return false; 4895 } 4896 } 4897 4898 private boolean mergeInsertWith(EditOperation edit) { 4899 // Only merge continuous insertions. 4900 if (edit.mType != TYPE_INSERT) { 4901 return false; 4902 } 4903 // Only merge insertions that are contiguous. 4904 if (getNewTextEnd() != edit.mNewTextStart) { 4905 return false; 4906 } 4907 mNewText += edit.mNewText; 4908 mNewCursorPos = edit.mNewCursorPos; 4909 return true; 4910 } 4911 4912 // TODO: Support forward delete. 4913 private boolean mergeDeleteWith(EditOperation edit) { 4914 // Only merge continuous deletes. 4915 if (edit.mType != TYPE_DELETE) { 4916 return false; 4917 } 4918 // Only merge deletions that are contiguous. 4919 if (mOldTextStart != edit.getOldTextEnd()) { 4920 return false; 4921 } 4922 mOldTextStart = edit.mOldTextStart; 4923 mOldText = edit.mOldText + mOldText; 4924 mNewCursorPos = edit.mNewCursorPos; 4925 return true; 4926 } 4927 4928 private boolean mergeReplaceWith(EditOperation edit) { 4929 // Replacements can merge only with adjacent inserts. 4930 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 4931 return false; 4932 } 4933 mOldText += edit.mOldText; 4934 mNewText += edit.mNewText; 4935 mNewCursorPos = edit.mNewCursorPos; 4936 return true; 4937 } 4938 4939 /** 4940 * Forcibly creates a single merged edit operation by simulating the entire text 4941 * contents being replaced. 4942 */ 4943 private void forceMergeWith(EditOperation edit) { 4944 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 4945 Editor editor = getOwnerData(); 4946 4947 // Copy the text of the current field. 4948 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 4949 // but would require two parallel implementations of modifyText() because Editable and 4950 // StringBuilder do not share an interface for replace/delete/insert. 4951 Editable editable = (Editable) editor.mTextView.getText(); 4952 Editable originalText = new SpannableStringBuilder(editable.toString()); 4953 4954 // Roll back the last operation. 4955 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4956 mOldCursorPos); 4957 4958 // Clone the text again and apply the new operation. 4959 Editable finalText = new SpannableStringBuilder(editable.toString()); 4960 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 4961 edit.mNewTextStart, edit.mNewCursorPos); 4962 4963 // Convert this operation into a non-mergeable replacement of the entire string. 4964 mType = TYPE_REPLACE; 4965 mNewText = finalText.toString(); 4966 mNewTextStart = 0; 4967 mOldText = originalText.toString(); 4968 mOldTextStart = 0; 4969 mNewCursorPos = edit.mNewCursorPos; 4970 // mOldCursorPos is unchanged. 4971 } 4972 4973 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 4974 CharSequence newText, int newTextInsertAt, int newCursorPos) { 4975 // Apply the edit if it is still valid. 4976 if (isValidRange(text, deleteFrom, deleteTo) && 4977 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 4978 if (deleteFrom != deleteTo) { 4979 text.delete(deleteFrom, deleteTo); 4980 } 4981 if (newText.length() != 0) { 4982 text.insert(newTextInsertAt, newText); 4983 } 4984 } 4985 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 4986 // don't explicitly set it and rely on SpannableStringBuilder to position it. 4987 // TODO: Select all the text that was undone. 4988 if (0 <= newCursorPos && newCursorPos <= text.length()) { 4989 Selection.setSelection(text, newCursorPos); 4990 } 4991 } 4992 4993 private String getTypeString() { 4994 switch (mType) { 4995 case TYPE_INSERT: 4996 return "insert"; 4997 case TYPE_DELETE: 4998 return "delete"; 4999 case TYPE_REPLACE: 5000 return "replace"; 5001 default: 5002 return ""; 5003 } 5004 } 5005 5006 @Override 5007 public String toString() { 5008 return "[mType=" + getTypeString() + ", " + 5009 "mOldText=" + mOldText + ", " + 5010 "mOldTextStart=" + mOldTextStart + ", " + 5011 "mNewText=" + mNewText + ", " + 5012 "mNewTextStart=" + mNewTextStart + ", " + 5013 "mOldCursorPos=" + mOldCursorPos + ", " + 5014 "mNewCursorPos=" + mNewCursorPos + "]"; 5015 } 5016 5017 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5018 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5019 @Override 5020 public EditOperation createFromParcel(Parcel in) { 5021 return new EditOperation(in, null); 5022 } 5023 5024 @Override 5025 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5026 return new EditOperation(in, loader); 5027 } 5028 5029 @Override 5030 public EditOperation[] newArray(int size) { 5031 return new EditOperation[size]; 5032 } 5033 }; 5034 } 5035} 5036