Editor.java revision d2026686702f6c893e871c078dc5176347b3b27e
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.content.UndoManager; 20import android.content.UndoOperation; 21import android.content.UndoOwner; 22import android.os.Build; 23import android.os.Parcel; 24import android.os.Parcelable; 25import android.text.InputFilter; 26import com.android.internal.util.ArrayUtils; 27import com.android.internal.util.GrowingArrayUtils; 28import com.android.internal.view.menu.MenuBuilder; 29import com.android.internal.widget.EditableInputConnection; 30 31import android.R; 32import android.app.PendingIntent; 33import android.app.PendingIntent.CanceledException; 34import android.content.ClipData; 35import android.content.ClipData.Item; 36import android.content.Context; 37import android.content.Intent; 38import android.content.pm.PackageManager; 39import android.content.res.TypedArray; 40import android.graphics.Canvas; 41import android.graphics.Color; 42import android.graphics.Matrix; 43import android.graphics.Paint; 44import android.graphics.Path; 45import android.graphics.Rect; 46import android.graphics.RectF; 47import android.graphics.drawable.Drawable; 48import android.inputmethodservice.ExtractEditText; 49import android.os.Bundle; 50import android.os.Handler; 51import android.os.ParcelableParcel; 52import android.os.SystemClock; 53import android.provider.Settings; 54import android.text.DynamicLayout; 55import android.text.Editable; 56import android.text.InputType; 57import android.text.Layout; 58import android.text.ParcelableSpan; 59import android.text.Selection; 60import android.text.SpanWatcher; 61import android.text.Spannable; 62import android.text.SpannableStringBuilder; 63import android.text.Spanned; 64import android.text.StaticLayout; 65import android.text.TextUtils; 66import android.text.method.KeyListener; 67import android.text.method.MetaKeyKeyListener; 68import android.text.method.MovementMethod; 69import android.text.method.PasswordTransformationMethod; 70import android.text.method.WordIterator; 71import android.text.style.EasyEditSpan; 72import android.text.style.SuggestionRangeSpan; 73import android.text.style.SuggestionSpan; 74import android.text.style.TextAppearanceSpan; 75import android.text.style.URLSpan; 76import android.util.DisplayMetrics; 77import android.util.Log; 78import android.view.ActionMode; 79import android.view.ActionMode.Callback; 80import android.view.RenderNode; 81import android.view.DragEvent; 82import android.view.Gravity; 83import android.view.HardwareCanvas; 84import android.view.LayoutInflater; 85import android.view.Menu; 86import android.view.MenuItem; 87import android.view.MotionEvent; 88import android.view.View; 89import android.view.View.DragShadowBuilder; 90import android.view.View.OnClickListener; 91import android.view.ViewConfiguration; 92import android.view.ViewGroup; 93import android.view.ViewGroup.LayoutParams; 94import android.view.ViewParent; 95import android.view.ViewTreeObserver; 96import android.view.WindowManager; 97import android.view.inputmethod.CorrectionInfo; 98import android.view.inputmethod.CursorAnchorInfo; 99import android.view.inputmethod.EditorInfo; 100import android.view.inputmethod.ExtractedText; 101import android.view.inputmethod.ExtractedTextRequest; 102import android.view.inputmethod.InputConnection; 103import android.view.inputmethod.InputMethodManager; 104import android.widget.AdapterView.OnItemClickListener; 105import android.widget.TextView.Drawables; 106import android.widget.TextView.OnEditorActionListener; 107 108import java.text.BreakIterator; 109import java.util.Arrays; 110import java.util.Comparator; 111import java.util.HashMap; 112 113/** 114 * Helper class used by TextView to handle editable text views. 115 * 116 * @hide 117 */ 118public class Editor { 119 private static final String TAG = "Editor"; 120 private static final boolean DEBUG_UNDO = false; 121 122 static final int BLINK = 500; 123 private static final float[] TEMP_POSITION = new float[2]; 124 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 125 // Tag used when the Editor maintains its own separate UndoManager. 126 private static final String UNDO_OWNER_TAG = "Editor"; 127 128 // Each Editor manages its own undo stack. 129 private final UndoManager mUndoManager = new UndoManager(); 130 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 131 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 132 boolean mAllowUndo = true; 133 134 // Cursor Controllers. 135 InsertionPointCursorController mInsertionPointCursorController; 136 SelectionModifierCursorController mSelectionModifierCursorController; 137 ActionMode mSelectionActionMode; 138 boolean mInsertionControllerEnabled; 139 boolean mSelectionControllerEnabled; 140 141 // Used to highlight a word when it is corrected by the IME 142 CorrectionHighlighter mCorrectionHighlighter; 143 144 InputContentType mInputContentType; 145 InputMethodState mInputMethodState; 146 147 private static class TextDisplayList { 148 RenderNode displayList; 149 boolean isDirty; 150 public TextDisplayList(String name) { 151 isDirty = true; 152 displayList = RenderNode.create(name, null); 153 } 154 boolean needsRecord() { return isDirty || !displayList.isValid(); } 155 } 156 TextDisplayList[] mTextDisplayLists; 157 158 boolean mFrozenWithFocus; 159 boolean mSelectionMoved; 160 boolean mTouchFocusSelected; 161 162 KeyListener mKeyListener; 163 int mInputType = EditorInfo.TYPE_NULL; 164 165 boolean mDiscardNextActionUp; 166 boolean mIgnoreActionUpEvent; 167 168 long mShowCursor; 169 Blink mBlink; 170 171 boolean mCursorVisible = true; 172 boolean mSelectAllOnFocus; 173 boolean mTextIsSelectable; 174 175 CharSequence mError; 176 boolean mErrorWasChanged; 177 ErrorPopup mErrorPopup; 178 179 /** 180 * This flag is set if the TextView tries to display an error before it 181 * is attached to the window (so its position is still unknown). 182 * It causes the error to be shown later, when onAttachedToWindow() 183 * is called. 184 */ 185 boolean mShowErrorAfterAttach; 186 187 boolean mInBatchEditControllers; 188 boolean mShowSoftInputOnFocus = true; 189 boolean mPreserveDetachedSelection; 190 boolean mTemporaryDetach; 191 192 SuggestionsPopupWindow mSuggestionsPopupWindow; 193 SuggestionRangeSpan mSuggestionRangeSpan; 194 Runnable mShowSuggestionRunnable; 195 196 final Drawable[] mCursorDrawable = new Drawable[2]; 197 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 198 199 private Drawable mSelectHandleLeft; 200 private Drawable mSelectHandleRight; 201 private Drawable mSelectHandleCenter; 202 203 // Global listener that detects changes in the global position of the TextView 204 private PositionListener mPositionListener; 205 206 float mLastDownPositionX, mLastDownPositionY; 207 Callback mCustomSelectionActionModeCallback; 208 209 // Set when this TextView gained focus with some text selected. Will start selection mode. 210 boolean mCreatedWithASelection; 211 212 // The span controller helps monitoring the changes to which the Editor needs to react: 213 // - EasyEditSpans, for which we have some UI to display on attach and on hide 214 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 215 private SpanController mSpanController; 216 217 WordIterator mWordIterator; 218 SpellChecker mSpellChecker; 219 220 // This word iterator is set with text and used to determine word boundaries 221 // when a user is selecting text. 222 private WordIterator mWordIteratorWithText; 223 // Indicate that the text in the word iterator needs to be updated. 224 private boolean mUpdateWordIteratorText; 225 226 private Rect mTempRect; 227 228 private TextView mTextView; 229 230 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 231 232 Editor(TextView textView) { 233 mTextView = textView; 234 // Synchronize the filter list, which places the undo input filter at the end. 235 mTextView.setFilters(mTextView.getFilters()); 236 } 237 238 ParcelableParcel saveInstanceState() { 239 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 startSelectionActionMode(); 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 shows the Paste affordance if available. 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().showWithActionPopup(); 992 handled = true; 993 } 994 995 if (!handled && mSelectionActionMode != null) { 996 if (touchPositionIsInSelection()) { 997 // Start a drag 998 final int start = mTextView.getSelectionStart(); 999 final int end = mTextView.getSelectionEnd(); 1000 CharSequence selectedText = mTextView.getTransformedText(start, end); 1001 ClipData data = ClipData.newPlainText(null, selectedText); 1002 DragLocalState localState = new DragLocalState(mTextView, start, end); 1003 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0); 1004 stopSelectionActionMode(); 1005 } else { 1006 stopSelectionActionMode(); 1007 startSelectionActionMode(); 1008 } 1009 handled = true; 1010 } 1011 1012 // Start a new selection 1013 if (!handled) { 1014 handled = startSelectionActionMode(); 1015 } 1016 1017 return handled; 1018 } 1019 1020 private long getLastTouchOffsets() { 1021 SelectionModifierCursorController selectionController = getSelectionController(); 1022 final int minOffset = selectionController.getMinTouchOffset(); 1023 final int maxOffset = selectionController.getMaxTouchOffset(); 1024 return TextUtils.packRangeInLong(minOffset, maxOffset); 1025 } 1026 1027 void onFocusChanged(boolean focused, int direction) { 1028 mShowCursor = SystemClock.uptimeMillis(); 1029 ensureEndedBatchEdit(); 1030 1031 if (focused) { 1032 int selStart = mTextView.getSelectionStart(); 1033 int selEnd = mTextView.getSelectionEnd(); 1034 1035 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1036 // mode for these, unless there was a specific selection already started. 1037 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1038 selEnd == mTextView.getText().length(); 1039 1040 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1041 !isFocusHighlighted; 1042 1043 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1044 // If a tap was used to give focus to that view, move cursor at tap position. 1045 // Has to be done before onTakeFocus, which can be overloaded. 1046 final int lastTapPosition = getLastTapPosition(); 1047 if (lastTapPosition >= 0) { 1048 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1049 } 1050 1051 // Note this may have to be moved out of the Editor class 1052 MovementMethod mMovement = mTextView.getMovementMethod(); 1053 if (mMovement != null) { 1054 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1055 } 1056 1057 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1058 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1059 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1060 // This special case ensure that we keep current selection in that case. 1061 // It would be better to know why the DecorView does not have focus at that time. 1062 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1063 selStart >= 0 && selEnd >= 0) { 1064 /* 1065 * Someone intentionally set the selection, so let them 1066 * do whatever it is that they wanted to do instead of 1067 * the default on-focus behavior. We reset the selection 1068 * here instead of just skipping the onTakeFocus() call 1069 * because some movement methods do something other than 1070 * just setting the selection in theirs and we still 1071 * need to go through that path. 1072 */ 1073 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1074 } 1075 1076 if (mSelectAllOnFocus) { 1077 mTextView.selectAllText(); 1078 } 1079 1080 mTouchFocusSelected = true; 1081 } 1082 1083 mFrozenWithFocus = false; 1084 mSelectionMoved = false; 1085 1086 if (mError != null) { 1087 showError(); 1088 } 1089 1090 makeBlink(); 1091 } else { 1092 if (mError != null) { 1093 hideError(); 1094 } 1095 // Don't leave us in the middle of a batch edit. 1096 mTextView.onEndBatchEdit(); 1097 1098 if (mTextView instanceof ExtractEditText) { 1099 // terminateTextSelectionMode removes selection, which we want to keep when 1100 // ExtractEditText goes out of focus. 1101 final int selStart = mTextView.getSelectionStart(); 1102 final int selEnd = mTextView.getSelectionEnd(); 1103 hideControllers(); 1104 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1105 } else { 1106 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1107 hideControllers(); 1108 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1109 downgradeEasyCorrectionSpans(); 1110 } 1111 1112 // No need to create the controller 1113 if (mSelectionModifierCursorController != null) { 1114 mSelectionModifierCursorController.resetTouchOffsets(); 1115 } 1116 } 1117 } 1118 1119 /** 1120 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1121 * span. 1122 */ 1123 private void downgradeEasyCorrectionSpans() { 1124 CharSequence text = mTextView.getText(); 1125 if (text instanceof Spannable) { 1126 Spannable spannable = (Spannable) text; 1127 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1128 spannable.length(), SuggestionSpan.class); 1129 for (int i = 0; i < suggestionSpans.length; i++) { 1130 int flags = suggestionSpans[i].getFlags(); 1131 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1132 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1133 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1134 suggestionSpans[i].setFlags(flags); 1135 } 1136 } 1137 } 1138 } 1139 1140 void sendOnTextChanged(int start, int after) { 1141 updateSpellCheckSpans(start, start + after, false); 1142 1143 // Flip flag to indicate the word iterator needs to have the text reset. 1144 mUpdateWordIteratorText = true; 1145 1146 // Hide the controllers as soon as text is modified (typing, procedural...) 1147 // We do not hide the span controllers, since they can be added when a new text is 1148 // inserted into the text view (voice IME). 1149 hideCursorControllers(); 1150 } 1151 1152 private int getLastTapPosition() { 1153 // No need to create the controller at that point, no last tap position saved 1154 if (mSelectionModifierCursorController != null) { 1155 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1156 if (lastTapPosition >= 0) { 1157 // Safety check, should not be possible. 1158 if (lastTapPosition > mTextView.getText().length()) { 1159 lastTapPosition = mTextView.getText().length(); 1160 } 1161 return lastTapPosition; 1162 } 1163 } 1164 1165 return -1; 1166 } 1167 1168 void onWindowFocusChanged(boolean hasWindowFocus) { 1169 if (hasWindowFocus) { 1170 if (mBlink != null) { 1171 mBlink.uncancel(); 1172 makeBlink(); 1173 } 1174 } else { 1175 if (mBlink != null) { 1176 mBlink.cancel(); 1177 } 1178 if (mInputContentType != null) { 1179 mInputContentType.enterDown = false; 1180 } 1181 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1182 hideControllers(); 1183 if (mSuggestionsPopupWindow != null) { 1184 mSuggestionsPopupWindow.onParentLostFocus(); 1185 } 1186 1187 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1188 ensureEndedBatchEdit(); 1189 } 1190 } 1191 1192 void onTouchEvent(MotionEvent event) { 1193 if (hasSelectionController()) { 1194 getSelectionController().onTouchEvent(event); 1195 } 1196 1197 if (mShowSuggestionRunnable != null) { 1198 mTextView.removeCallbacks(mShowSuggestionRunnable); 1199 mShowSuggestionRunnable = null; 1200 } 1201 1202 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1203 mLastDownPositionX = event.getX(); 1204 mLastDownPositionY = event.getY(); 1205 1206 // Reset this state; it will be re-set if super.onTouchEvent 1207 // causes focus to move to the view. 1208 mTouchFocusSelected = false; 1209 mIgnoreActionUpEvent = false; 1210 } 1211 } 1212 1213 public void beginBatchEdit() { 1214 mInBatchEditControllers = true; 1215 final InputMethodState ims = mInputMethodState; 1216 if (ims != null) { 1217 int nesting = ++ims.mBatchEditNesting; 1218 if (nesting == 1) { 1219 ims.mCursorChanged = false; 1220 ims.mChangedDelta = 0; 1221 if (ims.mContentChanged) { 1222 // We already have a pending change from somewhere else, 1223 // so turn this into a full update. 1224 ims.mChangedStart = 0; 1225 ims.mChangedEnd = mTextView.getText().length(); 1226 } else { 1227 ims.mChangedStart = EXTRACT_UNKNOWN; 1228 ims.mChangedEnd = EXTRACT_UNKNOWN; 1229 ims.mContentChanged = false; 1230 } 1231 mUndoInputFilter.beginBatchEdit(); 1232 mTextView.onBeginBatchEdit(); 1233 } 1234 } 1235 } 1236 1237 public void endBatchEdit() { 1238 mInBatchEditControllers = false; 1239 final InputMethodState ims = mInputMethodState; 1240 if (ims != null) { 1241 int nesting = --ims.mBatchEditNesting; 1242 if (nesting == 0) { 1243 finishBatchEdit(ims); 1244 } 1245 } 1246 } 1247 1248 void ensureEndedBatchEdit() { 1249 final InputMethodState ims = mInputMethodState; 1250 if (ims != null && ims.mBatchEditNesting != 0) { 1251 ims.mBatchEditNesting = 0; 1252 finishBatchEdit(ims); 1253 } 1254 } 1255 1256 void finishBatchEdit(final InputMethodState ims) { 1257 mTextView.onEndBatchEdit(); 1258 mUndoInputFilter.endBatchEdit(); 1259 1260 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1261 mTextView.updateAfterEdit(); 1262 reportExtractedText(); 1263 } else if (ims.mCursorChanged) { 1264 // Cheesy way to get us to report the current cursor location. 1265 mTextView.invalidateCursor(); 1266 } 1267 // sendUpdateSelection knows to avoid sending if the selection did 1268 // not actually change. 1269 sendUpdateSelection(); 1270 } 1271 1272 static final int EXTRACT_NOTHING = -2; 1273 static final int EXTRACT_UNKNOWN = -1; 1274 1275 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1276 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1277 EXTRACT_UNKNOWN, outText); 1278 } 1279 1280 private boolean extractTextInternal(ExtractedTextRequest request, 1281 int partialStartOffset, int partialEndOffset, int delta, 1282 ExtractedText outText) { 1283 final CharSequence content = mTextView.getText(); 1284 if (content != null) { 1285 if (partialStartOffset != EXTRACT_NOTHING) { 1286 final int N = content.length(); 1287 if (partialStartOffset < 0) { 1288 outText.partialStartOffset = outText.partialEndOffset = -1; 1289 partialStartOffset = 0; 1290 partialEndOffset = N; 1291 } else { 1292 // Now use the delta to determine the actual amount of text 1293 // we need. 1294 partialEndOffset += delta; 1295 // Adjust offsets to ensure we contain full spans. 1296 if (content instanceof Spanned) { 1297 Spanned spanned = (Spanned)content; 1298 Object[] spans = spanned.getSpans(partialStartOffset, 1299 partialEndOffset, ParcelableSpan.class); 1300 int i = spans.length; 1301 while (i > 0) { 1302 i--; 1303 int j = spanned.getSpanStart(spans[i]); 1304 if (j < partialStartOffset) partialStartOffset = j; 1305 j = spanned.getSpanEnd(spans[i]); 1306 if (j > partialEndOffset) partialEndOffset = j; 1307 } 1308 } 1309 outText.partialStartOffset = partialStartOffset; 1310 outText.partialEndOffset = partialEndOffset - delta; 1311 1312 if (partialStartOffset > N) { 1313 partialStartOffset = N; 1314 } else if (partialStartOffset < 0) { 1315 partialStartOffset = 0; 1316 } 1317 if (partialEndOffset > N) { 1318 partialEndOffset = N; 1319 } else if (partialEndOffset < 0) { 1320 partialEndOffset = 0; 1321 } 1322 } 1323 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1324 outText.text = content.subSequence(partialStartOffset, 1325 partialEndOffset); 1326 } else { 1327 outText.text = TextUtils.substring(content, partialStartOffset, 1328 partialEndOffset); 1329 } 1330 } else { 1331 outText.partialStartOffset = 0; 1332 outText.partialEndOffset = 0; 1333 outText.text = ""; 1334 } 1335 outText.flags = 0; 1336 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1337 outText.flags |= ExtractedText.FLAG_SELECTING; 1338 } 1339 if (mTextView.isSingleLine()) { 1340 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1341 } 1342 outText.startOffset = 0; 1343 outText.selectionStart = mTextView.getSelectionStart(); 1344 outText.selectionEnd = mTextView.getSelectionEnd(); 1345 return true; 1346 } 1347 return false; 1348 } 1349 1350 boolean reportExtractedText() { 1351 final Editor.InputMethodState ims = mInputMethodState; 1352 if (ims != null) { 1353 final boolean contentChanged = ims.mContentChanged; 1354 if (contentChanged || ims.mSelectionModeChanged) { 1355 ims.mContentChanged = false; 1356 ims.mSelectionModeChanged = false; 1357 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1358 if (req != null) { 1359 InputMethodManager imm = InputMethodManager.peekInstance(); 1360 if (imm != null) { 1361 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1362 "Retrieving extracted start=" + ims.mChangedStart + 1363 " end=" + ims.mChangedEnd + 1364 " delta=" + ims.mChangedDelta); 1365 if (ims.mChangedStart < 0 && !contentChanged) { 1366 ims.mChangedStart = EXTRACT_NOTHING; 1367 } 1368 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1369 ims.mChangedDelta, ims.mExtractedText)) { 1370 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1371 "Reporting extracted start=" + 1372 ims.mExtractedText.partialStartOffset + 1373 " end=" + ims.mExtractedText.partialEndOffset + 1374 ": " + ims.mExtractedText.text); 1375 1376 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1377 ims.mChangedStart = EXTRACT_UNKNOWN; 1378 ims.mChangedEnd = EXTRACT_UNKNOWN; 1379 ims.mChangedDelta = 0; 1380 ims.mContentChanged = false; 1381 return true; 1382 } 1383 } 1384 } 1385 } 1386 } 1387 return false; 1388 } 1389 1390 private void sendUpdateSelection() { 1391 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1392 final InputMethodManager imm = InputMethodManager.peekInstance(); 1393 if (null != imm) { 1394 final int selectionStart = mTextView.getSelectionStart(); 1395 final int selectionEnd = mTextView.getSelectionEnd(); 1396 int candStart = -1; 1397 int candEnd = -1; 1398 if (mTextView.getText() instanceof Spannable) { 1399 final Spannable sp = (Spannable) mTextView.getText(); 1400 candStart = EditableInputConnection.getComposingSpanStart(sp); 1401 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1402 } 1403 // InputMethodManager#updateSelection skips sending the message if 1404 // none of the parameters have changed since the last time we called it. 1405 imm.updateSelection(mTextView, 1406 selectionStart, selectionEnd, candStart, candEnd); 1407 } 1408 } 1409 } 1410 1411 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1412 int cursorOffsetVertical) { 1413 final int selectionStart = mTextView.getSelectionStart(); 1414 final int selectionEnd = mTextView.getSelectionEnd(); 1415 1416 final InputMethodState ims = mInputMethodState; 1417 if (ims != null && ims.mBatchEditNesting == 0) { 1418 InputMethodManager imm = InputMethodManager.peekInstance(); 1419 if (imm != null) { 1420 if (imm.isActive(mTextView)) { 1421 boolean reported = false; 1422 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1423 // We are in extract mode and the content has changed 1424 // in some way... just report complete new text to the 1425 // input method. 1426 reported = reportExtractedText(); 1427 } 1428 } 1429 } 1430 } 1431 1432 if (mCorrectionHighlighter != null) { 1433 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1434 } 1435 1436 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1437 drawCursor(canvas, cursorOffsetVertical); 1438 // Rely on the drawable entirely, do not draw the cursor line. 1439 // Has to be done after the IMM related code above which relies on the highlight. 1440 highlight = null; 1441 } 1442 1443 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1444 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1445 cursorOffsetVertical); 1446 } else { 1447 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1448 } 1449 } 1450 1451 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1452 Paint highlightPaint, int cursorOffsetVertical) { 1453 final long lineRange = layout.getLineRangeForDraw(canvas); 1454 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1455 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1456 if (lastLine < 0) return; 1457 1458 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1459 firstLine, lastLine); 1460 1461 if (layout instanceof DynamicLayout) { 1462 if (mTextDisplayLists == null) { 1463 mTextDisplayLists = ArrayUtils.emptyArray(TextDisplayList.class); 1464 } 1465 1466 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1467 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1468 int[] blockIndices = dynamicLayout.getBlockIndices(); 1469 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1470 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1471 1472 int endOfPreviousBlock = -1; 1473 int searchStartIndex = 0; 1474 for (int i = 0; i < numberOfBlocks; i++) { 1475 int blockEndLine = blockEndLines[i]; 1476 int blockIndex = blockIndices[i]; 1477 1478 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1479 if (blockIsInvalid) { 1480 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1481 searchStartIndex); 1482 // Note how dynamic layout's internal block indices get updated from Editor 1483 blockIndices[i] = blockIndex; 1484 if (mTextDisplayLists[blockIndex] != null) { 1485 mTextDisplayLists[blockIndex].isDirty = true; 1486 } 1487 searchStartIndex = blockIndex + 1; 1488 } 1489 1490 if (mTextDisplayLists[blockIndex] == null) { 1491 mTextDisplayLists[blockIndex] = 1492 new TextDisplayList("Text " + blockIndex); 1493 } 1494 1495 final boolean blockDisplayListIsInvalid = mTextDisplayLists[blockIndex].needsRecord(); 1496 RenderNode blockDisplayList = mTextDisplayLists[blockIndex].displayList; 1497 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1498 final int blockBeginLine = endOfPreviousBlock + 1; 1499 final int top = layout.getLineTop(blockBeginLine); 1500 final int bottom = layout.getLineBottom(blockEndLine); 1501 int left = 0; 1502 int right = mTextView.getWidth(); 1503 if (mTextView.getHorizontallyScrolling()) { 1504 float min = Float.MAX_VALUE; 1505 float max = Float.MIN_VALUE; 1506 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1507 min = Math.min(min, layout.getLineLeft(line)); 1508 max = Math.max(max, layout.getLineRight(line)); 1509 } 1510 left = (int) min; 1511 right = (int) (max + 0.5f); 1512 } 1513 1514 // Rebuild display list if it is invalid 1515 if (blockDisplayListIsInvalid) { 1516 final HardwareCanvas hardwareCanvas = blockDisplayList.start( 1517 right - left, bottom - top); 1518 try { 1519 // drawText is always relative to TextView's origin, this translation 1520 // brings this range of text back to the top left corner of the viewport 1521 hardwareCanvas.translate(-left, -top); 1522 layout.drawText(hardwareCanvas, blockBeginLine, blockEndLine); 1523 mTextDisplayLists[blockIndex].isDirty = false; 1524 // No need to untranslate, previous context is popped after 1525 // drawDisplayList 1526 } finally { 1527 blockDisplayList.end(hardwareCanvas); 1528 // Same as drawDisplayList below, handled by our TextView's parent 1529 blockDisplayList.setClipToBounds(false); 1530 } 1531 } 1532 1533 // Valid disply list whose index is >= indexFirstChangedBlock 1534 // only needs to update its drawing location. 1535 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1536 } 1537 1538 ((HardwareCanvas) canvas).drawRenderNode(blockDisplayList, 1539 0 /* no child clipping, our TextView parent enforces it */); 1540 1541 endOfPreviousBlock = blockEndLine; 1542 } 1543 1544 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1545 } else { 1546 // Boring layout is used for empty and hint text 1547 layout.drawText(canvas, firstLine, lastLine); 1548 } 1549 } 1550 1551 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1552 int searchStartIndex) { 1553 int length = mTextDisplayLists.length; 1554 for (int i = searchStartIndex; i < length; i++) { 1555 boolean blockIndexFound = false; 1556 for (int j = 0; j < numberOfBlocks; j++) { 1557 if (blockIndices[j] == i) { 1558 blockIndexFound = true; 1559 break; 1560 } 1561 } 1562 if (blockIndexFound) continue; 1563 return i; 1564 } 1565 1566 // No available index found, the pool has to grow 1567 mTextDisplayLists = GrowingArrayUtils.append(mTextDisplayLists, length, null); 1568 return length; 1569 } 1570 1571 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1572 final boolean translate = cursorOffsetVertical != 0; 1573 if (translate) canvas.translate(0, cursorOffsetVertical); 1574 for (int i = 0; i < mCursorCount; i++) { 1575 mCursorDrawable[i].draw(canvas); 1576 } 1577 if (translate) canvas.translate(0, -cursorOffsetVertical); 1578 } 1579 1580 /** 1581 * Invalidates all the sub-display lists that overlap the specified character range 1582 */ 1583 void invalidateTextDisplayList(Layout layout, int start, int end) { 1584 if (mTextDisplayLists != null && layout instanceof DynamicLayout) { 1585 final int firstLine = layout.getLineForOffset(start); 1586 final int lastLine = layout.getLineForOffset(end); 1587 1588 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1589 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1590 int[] blockIndices = dynamicLayout.getBlockIndices(); 1591 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1592 1593 int i = 0; 1594 // Skip the blocks before firstLine 1595 while (i < numberOfBlocks) { 1596 if (blockEndLines[i] >= firstLine) break; 1597 i++; 1598 } 1599 1600 // Invalidate all subsequent blocks until lastLine is passed 1601 while (i < numberOfBlocks) { 1602 final int blockIndex = blockIndices[i]; 1603 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1604 mTextDisplayLists[blockIndex].isDirty = true; 1605 } 1606 if (blockEndLines[i] >= lastLine) break; 1607 i++; 1608 } 1609 } 1610 } 1611 1612 void invalidateTextDisplayList() { 1613 if (mTextDisplayLists != null) { 1614 for (int i = 0; i < mTextDisplayLists.length; i++) { 1615 if (mTextDisplayLists[i] != null) mTextDisplayLists[i].isDirty = true; 1616 } 1617 } 1618 } 1619 1620 void updateCursorsPositions() { 1621 if (mTextView.mCursorDrawableRes == 0) { 1622 mCursorCount = 0; 1623 return; 1624 } 1625 1626 Layout layout = mTextView.getLayout(); 1627 Layout hintLayout = mTextView.getHintLayout(); 1628 final int offset = mTextView.getSelectionStart(); 1629 final int line = layout.getLineForOffset(offset); 1630 final int top = layout.getLineTop(line); 1631 final int bottom = layout.getLineTop(line + 1); 1632 1633 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1634 1635 int middle = bottom; 1636 if (mCursorCount == 2) { 1637 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1638 middle = (top + bottom) >> 1; 1639 } 1640 1641 boolean clamped = layout.shouldClampCursor(line); 1642 updateCursorPosition(0, top, middle, 1643 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1644 1645 if (mCursorCount == 2) { 1646 updateCursorPosition(1, middle, bottom, 1647 layout.getSecondaryHorizontal(offset, clamped)); 1648 } 1649 } 1650 1651 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1652 boolean clamped) { 1653 if (TextUtils.isEmpty(layout.getText()) && 1654 hintLayout != null && 1655 !TextUtils.isEmpty(hintLayout.getText())) { 1656 return hintLayout.getPrimaryHorizontal(offset, clamped); 1657 } else { 1658 return layout.getPrimaryHorizontal(offset, clamped); 1659 } 1660 } 1661 1662 /** 1663 * @return true if the selection mode was actually started. 1664 */ 1665 boolean startSelectionActionMode() { 1666 if (mSelectionActionMode != null) { 1667 // Selection action mode is already started 1668 return false; 1669 } 1670 1671 if (!canSelectText() || !mTextView.requestFocus()) { 1672 Log.w(TextView.LOG_TAG, 1673 "TextView does not support text selection. Action mode cancelled."); 1674 return false; 1675 } 1676 1677 if (!mTextView.hasSelection()) { 1678 // There may already be a selection on device rotation 1679 if (!selectCurrentWord()) { 1680 // No word found under cursor or text selection not permitted. 1681 return false; 1682 } 1683 } 1684 1685 boolean willExtract = extractedTextModeWillBeStarted(); 1686 1687 // Do not start the action mode when extracted text will show up full screen, which would 1688 // immediately hide the newly created action bar and would be visually distracting. 1689 if (!willExtract) { 1690 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1691 mSelectionActionMode = mTextView.startActionMode(actionModeCallback); 1692 } 1693 1694 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1695 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1696 // Show the IME to be able to replace text, except when selecting non editable text. 1697 final InputMethodManager imm = InputMethodManager.peekInstance(); 1698 if (imm != null) { 1699 imm.showSoftInput(mTextView, 0, null); 1700 } 1701 } 1702 1703 if (selectionStarted) { 1704 getSelectionController().enterDrag(); 1705 } 1706 return selectionStarted; 1707 } 1708 1709 private boolean extractedTextModeWillBeStarted() { 1710 if (!(mTextView instanceof ExtractEditText)) { 1711 final InputMethodManager imm = InputMethodManager.peekInstance(); 1712 return imm != null && imm.isFullscreenMode(); 1713 } 1714 return false; 1715 } 1716 1717 /** 1718 * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}. 1719 */ 1720 private boolean isCursorInsideSuggestionSpan() { 1721 CharSequence text = mTextView.getText(); 1722 if (!(text instanceof Spannable)) return false; 1723 1724 SuggestionSpan[] suggestionSpans = ((Spannable) text).getSpans( 1725 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), SuggestionSpan.class); 1726 return (suggestionSpans.length > 0); 1727 } 1728 1729 /** 1730 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1731 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1732 */ 1733 private boolean isCursorInsideEasyCorrectionSpan() { 1734 Spannable spannable = (Spannable) mTextView.getText(); 1735 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1736 mTextView.getSelectionEnd(), SuggestionSpan.class); 1737 for (int i = 0; i < suggestionSpans.length; i++) { 1738 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1739 return true; 1740 } 1741 } 1742 return false; 1743 } 1744 1745 void onTouchUpEvent(MotionEvent event) { 1746 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1747 hideControllers(); 1748 CharSequence text = mTextView.getText(); 1749 if (!selectAllGotFocus && text.length() > 0) { 1750 // Move cursor 1751 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1752 Selection.setSelection((Spannable) text, offset); 1753 if (mSpellChecker != null) { 1754 // When the cursor moves, the word that was typed may need spell check 1755 mSpellChecker.onSelectionChanged(); 1756 } 1757 if (!extractedTextModeWillBeStarted()) { 1758 if (isCursorInsideEasyCorrectionSpan()) { 1759 mShowSuggestionRunnable = new Runnable() { 1760 public void run() { 1761 showSuggestions(); 1762 } 1763 }; 1764 // removeCallbacks is performed on every touch 1765 mTextView.postDelayed(mShowSuggestionRunnable, 1766 ViewConfiguration.getDoubleTapTimeout()); 1767 } else if (hasInsertionController()) { 1768 getInsertionController().show(); 1769 } 1770 } 1771 } 1772 } 1773 1774 protected void stopSelectionActionMode() { 1775 if (mSelectionActionMode != null) { 1776 // This will hide the mSelectionModifierCursorController 1777 mSelectionActionMode.finish(); 1778 } 1779 } 1780 1781 /** 1782 * @return True if this view supports insertion handles. 1783 */ 1784 boolean hasInsertionController() { 1785 return mInsertionControllerEnabled; 1786 } 1787 1788 /** 1789 * @return True if this view supports selection handles. 1790 */ 1791 boolean hasSelectionController() { 1792 return mSelectionControllerEnabled; 1793 } 1794 1795 InsertionPointCursorController getInsertionController() { 1796 if (!mInsertionControllerEnabled) { 1797 return null; 1798 } 1799 1800 if (mInsertionPointCursorController == null) { 1801 mInsertionPointCursorController = new InsertionPointCursorController(); 1802 1803 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1804 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1805 } 1806 1807 return mInsertionPointCursorController; 1808 } 1809 1810 SelectionModifierCursorController getSelectionController() { 1811 if (!mSelectionControllerEnabled) { 1812 return null; 1813 } 1814 1815 if (mSelectionModifierCursorController == null) { 1816 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1817 1818 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1819 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1820 } 1821 1822 return mSelectionModifierCursorController; 1823 } 1824 1825 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1826 if (mCursorDrawable[cursorIndex] == null) 1827 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1828 mTextView.mCursorDrawableRes); 1829 1830 if (mTempRect == null) mTempRect = new Rect(); 1831 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1832 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1833 horizontal = Math.max(0.5f, horizontal - 0.5f); 1834 final int left = (int) (horizontal) - mTempRect.left; 1835 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1836 bottom + mTempRect.bottom); 1837 } 1838 1839 /** 1840 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1841 * a dictionary) from the current input method, provided by it calling 1842 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1843 * implementation flashes the background of the corrected word to provide feedback to the user. 1844 * 1845 * @param info The auto correct info about the text that was corrected. 1846 */ 1847 public void onCommitCorrection(CorrectionInfo info) { 1848 if (mCorrectionHighlighter == null) { 1849 mCorrectionHighlighter = new CorrectionHighlighter(); 1850 } else { 1851 mCorrectionHighlighter.invalidate(false); 1852 } 1853 1854 mCorrectionHighlighter.highlight(info); 1855 } 1856 1857 void showSuggestions() { 1858 if (mSuggestionsPopupWindow == null) { 1859 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1860 } 1861 hideControllers(); 1862 mSuggestionsPopupWindow.show(); 1863 } 1864 1865 boolean areSuggestionsShown() { 1866 return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing(); 1867 } 1868 1869 void onScrollChanged() { 1870 if (mPositionListener != null) { 1871 mPositionListener.onScrollChanged(); 1872 } 1873 } 1874 1875 /** 1876 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1877 */ 1878 private boolean shouldBlink() { 1879 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1880 1881 final int start = mTextView.getSelectionStart(); 1882 if (start < 0) return false; 1883 1884 final int end = mTextView.getSelectionEnd(); 1885 if (end < 0) return false; 1886 1887 return start == end; 1888 } 1889 1890 void makeBlink() { 1891 if (shouldBlink()) { 1892 mShowCursor = SystemClock.uptimeMillis(); 1893 if (mBlink == null) mBlink = new Blink(); 1894 mBlink.removeCallbacks(mBlink); 1895 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 1896 } else { 1897 if (mBlink != null) mBlink.removeCallbacks(mBlink); 1898 } 1899 } 1900 1901 private class Blink extends Handler implements Runnable { 1902 private boolean mCancelled; 1903 1904 public void run() { 1905 if (mCancelled) { 1906 return; 1907 } 1908 1909 removeCallbacks(Blink.this); 1910 1911 if (shouldBlink()) { 1912 if (mTextView.getLayout() != null) { 1913 mTextView.invalidateCursorPath(); 1914 } 1915 1916 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 1917 } 1918 } 1919 1920 void cancel() { 1921 if (!mCancelled) { 1922 removeCallbacks(Blink.this); 1923 mCancelled = true; 1924 } 1925 } 1926 1927 void uncancel() { 1928 mCancelled = false; 1929 } 1930 } 1931 1932 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 1933 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 1934 com.android.internal.R.layout.text_drag_thumbnail, null); 1935 1936 if (shadowView == null) { 1937 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 1938 } 1939 1940 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 1941 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 1942 } 1943 shadowView.setText(text); 1944 shadowView.setTextColor(mTextView.getTextColors()); 1945 1946 shadowView.setTextAppearance(mTextView.getContext(), R.styleable.Theme_textAppearanceLarge); 1947 shadowView.setGravity(Gravity.CENTER); 1948 1949 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 1950 ViewGroup.LayoutParams.WRAP_CONTENT)); 1951 1952 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 1953 shadowView.measure(size, size); 1954 1955 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 1956 shadowView.invalidate(); 1957 return new DragShadowBuilder(shadowView); 1958 } 1959 1960 private static class DragLocalState { 1961 public TextView sourceTextView; 1962 public int start, end; 1963 1964 public DragLocalState(TextView sourceTextView, int start, int end) { 1965 this.sourceTextView = sourceTextView; 1966 this.start = start; 1967 this.end = end; 1968 } 1969 } 1970 1971 void onDrop(DragEvent event) { 1972 StringBuilder content = new StringBuilder(""); 1973 ClipData clipData = event.getClipData(); 1974 final int itemCount = clipData.getItemCount(); 1975 for (int i=0; i < itemCount; i++) { 1976 Item item = clipData.getItemAt(i); 1977 content.append(item.coerceToStyledText(mTextView.getContext())); 1978 } 1979 1980 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1981 1982 Object localState = event.getLocalState(); 1983 DragLocalState dragLocalState = null; 1984 if (localState instanceof DragLocalState) { 1985 dragLocalState = (DragLocalState) localState; 1986 } 1987 boolean dragDropIntoItself = dragLocalState != null && 1988 dragLocalState.sourceTextView == mTextView; 1989 1990 if (dragDropIntoItself) { 1991 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 1992 // A drop inside the original selection discards the drop. 1993 return; 1994 } 1995 } 1996 1997 final int originalLength = mTextView.getText().length(); 1998 int min = offset; 1999 int max = offset; 2000 2001 Selection.setSelection((Spannable) mTextView.getText(), max); 2002 mTextView.replaceText_internal(min, max, content); 2003 2004 if (dragDropIntoItself) { 2005 int dragSourceStart = dragLocalState.start; 2006 int dragSourceEnd = dragLocalState.end; 2007 if (max <= dragSourceStart) { 2008 // Inserting text before selection has shifted positions 2009 final int shift = mTextView.getText().length() - originalLength; 2010 dragSourceStart += shift; 2011 dragSourceEnd += shift; 2012 } 2013 2014 // Delete original selection 2015 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2016 2017 // Make sure we do not leave two adjacent spaces. 2018 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2019 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2020 if (nextCharIdx > prevCharIdx + 1) { 2021 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2022 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2023 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2024 } 2025 } 2026 } 2027 } 2028 2029 public void addSpanWatchers(Spannable text) { 2030 final int textLength = text.length(); 2031 2032 if (mKeyListener != null) { 2033 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2034 } 2035 2036 if (mSpanController == null) { 2037 mSpanController = new SpanController(); 2038 } 2039 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2040 } 2041 2042 /** 2043 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2044 * pop-up should be displayed. 2045 * Also monitors {@link Selection} to call back to the attached input method. 2046 */ 2047 class SpanController implements SpanWatcher { 2048 2049 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2050 2051 private EasyEditPopupWindow mPopupWindow; 2052 2053 private Runnable mHidePopup; 2054 2055 // This function is pure but inner classes can't have static functions 2056 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2057 final Object span) { 2058 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2059 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2060 } 2061 2062 @Override 2063 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2064 if (isNonIntermediateSelectionSpan(text, span)) { 2065 sendUpdateSelection(); 2066 } else if (span instanceof EasyEditSpan) { 2067 if (mPopupWindow == null) { 2068 mPopupWindow = new EasyEditPopupWindow(); 2069 mHidePopup = new Runnable() { 2070 @Override 2071 public void run() { 2072 hide(); 2073 } 2074 }; 2075 } 2076 2077 // Make sure there is only at most one EasyEditSpan in the text 2078 if (mPopupWindow.mEasyEditSpan != null) { 2079 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2080 } 2081 2082 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2083 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2084 @Override 2085 public void onDeleteClick(EasyEditSpan span) { 2086 Editable editable = (Editable) mTextView.getText(); 2087 int start = editable.getSpanStart(span); 2088 int end = editable.getSpanEnd(span); 2089 if (start >= 0 && end >= 0) { 2090 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2091 mTextView.deleteText_internal(start, end); 2092 } 2093 editable.removeSpan(span); 2094 } 2095 }); 2096 2097 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2098 // The window is not visible yet, ignore the text change. 2099 return; 2100 } 2101 2102 if (mTextView.getLayout() == null) { 2103 // The view has not been laid out yet, ignore the text change 2104 return; 2105 } 2106 2107 if (extractedTextModeWillBeStarted()) { 2108 // The input is in extract mode. Do not handle the easy edit in 2109 // the original TextView, as the ExtractEditText will do 2110 return; 2111 } 2112 2113 mPopupWindow.show(); 2114 mTextView.removeCallbacks(mHidePopup); 2115 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2116 } 2117 } 2118 2119 @Override 2120 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2121 if (isNonIntermediateSelectionSpan(text, span)) { 2122 sendUpdateSelection(); 2123 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2124 hide(); 2125 } 2126 } 2127 2128 @Override 2129 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2130 int newStart, int newEnd) { 2131 if (isNonIntermediateSelectionSpan(text, span)) { 2132 sendUpdateSelection(); 2133 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2134 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2135 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2136 text.removeSpan(easyEditSpan); 2137 } 2138 } 2139 2140 public void hide() { 2141 if (mPopupWindow != null) { 2142 mPopupWindow.hide(); 2143 mTextView.removeCallbacks(mHidePopup); 2144 } 2145 } 2146 2147 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2148 try { 2149 PendingIntent pendingIntent = span.getPendingIntent(); 2150 if (pendingIntent != null) { 2151 Intent intent = new Intent(); 2152 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2153 pendingIntent.send(mTextView.getContext(), 0, intent); 2154 } 2155 } catch (CanceledException e) { 2156 // This should not happen, as we should try to send the intent only once. 2157 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2158 } 2159 } 2160 } 2161 2162 /** 2163 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2164 */ 2165 private interface EasyEditDeleteListener { 2166 2167 /** 2168 * Clicks the delete pop-up. 2169 */ 2170 void onDeleteClick(EasyEditSpan span); 2171 } 2172 2173 /** 2174 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2175 * by {@link SpanController}. 2176 */ 2177 private class EasyEditPopupWindow extends PinnedPopupWindow 2178 implements OnClickListener { 2179 private static final int POPUP_TEXT_LAYOUT = 2180 com.android.internal.R.layout.text_edit_action_popup_text; 2181 private TextView mDeleteTextView; 2182 private EasyEditSpan mEasyEditSpan; 2183 private EasyEditDeleteListener mOnDeleteListener; 2184 2185 @Override 2186 protected void createPopupWindow() { 2187 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2188 com.android.internal.R.attr.textSelectHandleWindowStyle); 2189 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2190 mPopupWindow.setClippingEnabled(true); 2191 } 2192 2193 @Override 2194 protected void initContentView() { 2195 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2196 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2197 mContentView = linearLayout; 2198 mContentView.setBackgroundResource( 2199 com.android.internal.R.drawable.text_edit_side_paste_window); 2200 2201 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2202 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2203 2204 LayoutParams wrapContent = new LayoutParams( 2205 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2206 2207 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2208 mDeleteTextView.setLayoutParams(wrapContent); 2209 mDeleteTextView.setText(com.android.internal.R.string.delete); 2210 mDeleteTextView.setOnClickListener(this); 2211 mContentView.addView(mDeleteTextView); 2212 } 2213 2214 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2215 mEasyEditSpan = easyEditSpan; 2216 } 2217 2218 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2219 mOnDeleteListener = listener; 2220 } 2221 2222 @Override 2223 public void onClick(View view) { 2224 if (view == mDeleteTextView 2225 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2226 && mOnDeleteListener != null) { 2227 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2228 } 2229 } 2230 2231 @Override 2232 public void hide() { 2233 if (mEasyEditSpan != null) { 2234 mEasyEditSpan.setDeleteEnabled(false); 2235 } 2236 mOnDeleteListener = null; 2237 super.hide(); 2238 } 2239 2240 @Override 2241 protected int getTextOffset() { 2242 // Place the pop-up at the end of the span 2243 Editable editable = (Editable) mTextView.getText(); 2244 return editable.getSpanEnd(mEasyEditSpan); 2245 } 2246 2247 @Override 2248 protected int getVerticalLocalPosition(int line) { 2249 return mTextView.getLayout().getLineBottom(line); 2250 } 2251 2252 @Override 2253 protected int clipVertically(int positionY) { 2254 // As we display the pop-up below the span, no vertical clipping is required. 2255 return positionY; 2256 } 2257 } 2258 2259 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2260 // 3 handles 2261 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2262 // 1 CursorAnchorInfoNotifier 2263 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2264 private TextViewPositionListener[] mPositionListeners = 2265 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2266 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2267 private boolean mPositionHasChanged = true; 2268 // Absolute position of the TextView with respect to its parent window 2269 private int mPositionX, mPositionY; 2270 private int mNumberOfListeners; 2271 private boolean mScrollHasChanged; 2272 final int[] mTempCoords = new int[2]; 2273 2274 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2275 if (mNumberOfListeners == 0) { 2276 updatePosition(); 2277 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2278 vto.addOnPreDrawListener(this); 2279 } 2280 2281 int emptySlotIndex = -1; 2282 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2283 TextViewPositionListener listener = mPositionListeners[i]; 2284 if (listener == positionListener) { 2285 return; 2286 } else if (emptySlotIndex < 0 && listener == null) { 2287 emptySlotIndex = i; 2288 } 2289 } 2290 2291 mPositionListeners[emptySlotIndex] = positionListener; 2292 mCanMove[emptySlotIndex] = canMove; 2293 mNumberOfListeners++; 2294 } 2295 2296 public void removeSubscriber(TextViewPositionListener positionListener) { 2297 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2298 if (mPositionListeners[i] == positionListener) { 2299 mPositionListeners[i] = null; 2300 mNumberOfListeners--; 2301 break; 2302 } 2303 } 2304 2305 if (mNumberOfListeners == 0) { 2306 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2307 vto.removeOnPreDrawListener(this); 2308 } 2309 } 2310 2311 public int getPositionX() { 2312 return mPositionX; 2313 } 2314 2315 public int getPositionY() { 2316 return mPositionY; 2317 } 2318 2319 @Override 2320 public boolean onPreDraw() { 2321 updatePosition(); 2322 2323 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2324 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2325 TextViewPositionListener positionListener = mPositionListeners[i]; 2326 if (positionListener != null) { 2327 positionListener.updatePosition(mPositionX, mPositionY, 2328 mPositionHasChanged, mScrollHasChanged); 2329 } 2330 } 2331 } 2332 2333 mScrollHasChanged = false; 2334 return true; 2335 } 2336 2337 private void updatePosition() { 2338 mTextView.getLocationInWindow(mTempCoords); 2339 2340 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2341 2342 mPositionX = mTempCoords[0]; 2343 mPositionY = mTempCoords[1]; 2344 } 2345 2346 public void onScrollChanged() { 2347 mScrollHasChanged = true; 2348 } 2349 } 2350 2351 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2352 protected PopupWindow mPopupWindow; 2353 protected ViewGroup mContentView; 2354 int mPositionX, mPositionY; 2355 2356 protected abstract void createPopupWindow(); 2357 protected abstract void initContentView(); 2358 protected abstract int getTextOffset(); 2359 protected abstract int getVerticalLocalPosition(int line); 2360 protected abstract int clipVertically(int positionY); 2361 2362 public PinnedPopupWindow() { 2363 createPopupWindow(); 2364 2365 mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 2366 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2367 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2368 2369 initContentView(); 2370 2371 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2372 ViewGroup.LayoutParams.WRAP_CONTENT); 2373 mContentView.setLayoutParams(wrapContent); 2374 2375 mPopupWindow.setContentView(mContentView); 2376 } 2377 2378 public void show() { 2379 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2380 2381 computeLocalPosition(); 2382 2383 final PositionListener positionListener = getPositionListener(); 2384 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2385 } 2386 2387 protected void measureContent() { 2388 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2389 mContentView.measure( 2390 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2391 View.MeasureSpec.AT_MOST), 2392 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2393 View.MeasureSpec.AT_MOST)); 2394 } 2395 2396 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2397 * positioned according to viewportToContentHorizontalOffset. 2398 * 2399 * This method assumes that mContentView has properly been measured from its content. */ 2400 private void computeLocalPosition() { 2401 measureContent(); 2402 final int width = mContentView.getMeasuredWidth(); 2403 final int offset = getTextOffset(); 2404 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2405 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2406 2407 final int line = mTextView.getLayout().getLineForOffset(offset); 2408 mPositionY = getVerticalLocalPosition(line); 2409 mPositionY += mTextView.viewportToContentVerticalOffset(); 2410 } 2411 2412 private void updatePosition(int parentPositionX, int parentPositionY) { 2413 int positionX = parentPositionX + mPositionX; 2414 int positionY = parentPositionY + mPositionY; 2415 2416 positionY = clipVertically(positionY); 2417 2418 // Horizontal clipping 2419 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2420 final int width = mContentView.getMeasuredWidth(); 2421 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2422 positionX = Math.max(0, positionX); 2423 2424 if (isShowing()) { 2425 mPopupWindow.update(positionX, positionY, -1, -1); 2426 } else { 2427 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2428 positionX, positionY); 2429 } 2430 } 2431 2432 public void hide() { 2433 mPopupWindow.dismiss(); 2434 getPositionListener().removeSubscriber(this); 2435 } 2436 2437 @Override 2438 public void updatePosition(int parentPositionX, int parentPositionY, 2439 boolean parentPositionChanged, boolean parentScrolled) { 2440 // Either parentPositionChanged or parentScrolled is true, check if still visible 2441 if (isShowing() && isOffsetVisible(getTextOffset())) { 2442 if (parentScrolled) computeLocalPosition(); 2443 updatePosition(parentPositionX, parentPositionY); 2444 } else { 2445 hide(); 2446 } 2447 } 2448 2449 public boolean isShowing() { 2450 return mPopupWindow.isShowing(); 2451 } 2452 } 2453 2454 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2455 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2456 private static final int ADD_TO_DICTIONARY = -1; 2457 private static final int DELETE_TEXT = -2; 2458 private SuggestionInfo[] mSuggestionInfos; 2459 private int mNumberOfSuggestions; 2460 private boolean mCursorWasVisibleBeforeSuggestions; 2461 private boolean mIsShowingUp = false; 2462 private SuggestionAdapter mSuggestionsAdapter; 2463 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2464 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2465 2466 private class CustomPopupWindow extends PopupWindow { 2467 public CustomPopupWindow(Context context, int defStyleAttr) { 2468 super(context, null, defStyleAttr); 2469 } 2470 2471 @Override 2472 public void dismiss() { 2473 super.dismiss(); 2474 2475 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2476 2477 // Safe cast since show() checks that mTextView.getText() is an Editable 2478 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2479 2480 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2481 if (hasInsertionController()) { 2482 getInsertionController().show(); 2483 } 2484 } 2485 } 2486 2487 public SuggestionsPopupWindow() { 2488 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2489 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2490 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2491 } 2492 2493 @Override 2494 protected void createPopupWindow() { 2495 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2496 com.android.internal.R.attr.textSuggestionsWindowStyle); 2497 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2498 mPopupWindow.setFocusable(true); 2499 mPopupWindow.setClippingEnabled(false); 2500 } 2501 2502 @Override 2503 protected void initContentView() { 2504 ListView listView = new ListView(mTextView.getContext()); 2505 mSuggestionsAdapter = new SuggestionAdapter(); 2506 listView.setAdapter(mSuggestionsAdapter); 2507 listView.setOnItemClickListener(this); 2508 mContentView = listView; 2509 2510 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2511 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2512 for (int i = 0; i < mSuggestionInfos.length; i++) { 2513 mSuggestionInfos[i] = new SuggestionInfo(); 2514 } 2515 } 2516 2517 public boolean isShowingUp() { 2518 return mIsShowingUp; 2519 } 2520 2521 public void onParentLostFocus() { 2522 mIsShowingUp = false; 2523 } 2524 2525 private class SuggestionInfo { 2526 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2527 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2528 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2529 SpannableStringBuilder text = new SpannableStringBuilder(); 2530 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2531 android.R.style.TextAppearance_SuggestionHighlight); 2532 } 2533 2534 private class SuggestionAdapter extends BaseAdapter { 2535 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2536 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2537 2538 @Override 2539 public int getCount() { 2540 return mNumberOfSuggestions; 2541 } 2542 2543 @Override 2544 public Object getItem(int position) { 2545 return mSuggestionInfos[position]; 2546 } 2547 2548 @Override 2549 public long getItemId(int position) { 2550 return position; 2551 } 2552 2553 @Override 2554 public View getView(int position, View convertView, ViewGroup parent) { 2555 TextView textView = (TextView) convertView; 2556 2557 if (textView == null) { 2558 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2559 parent, false); 2560 } 2561 2562 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2563 textView.setText(suggestionInfo.text); 2564 2565 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2566 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2567 textView.setBackgroundColor(Color.TRANSPARENT); 2568 } else { 2569 textView.setBackgroundColor(Color.WHITE); 2570 } 2571 2572 return textView; 2573 } 2574 } 2575 2576 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2577 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2578 final int flag1 = span1.getFlags(); 2579 final int flag2 = span2.getFlags(); 2580 if (flag1 != flag2) { 2581 // The order here should match what is used in updateDrawState 2582 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2583 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2584 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2585 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2586 if (easy1 && !misspelled1) return -1; 2587 if (easy2 && !misspelled2) return 1; 2588 if (misspelled1) return -1; 2589 if (misspelled2) return 1; 2590 } 2591 2592 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2593 } 2594 } 2595 2596 /** 2597 * Returns the suggestion spans that cover the current cursor position. The suggestion 2598 * spans are sorted according to the length of text that they are attached to. 2599 */ 2600 private SuggestionSpan[] getSuggestionSpans() { 2601 int pos = mTextView.getSelectionStart(); 2602 Spannable spannable = (Spannable) mTextView.getText(); 2603 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2604 2605 mSpansLengths.clear(); 2606 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2607 int start = spannable.getSpanStart(suggestionSpan); 2608 int end = spannable.getSpanEnd(suggestionSpan); 2609 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2610 } 2611 2612 // The suggestions are sorted according to their types (easy correction first, then 2613 // misspelled) and to the length of the text that they cover (shorter first). 2614 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2615 return suggestionSpans; 2616 } 2617 2618 @Override 2619 public void show() { 2620 if (!(mTextView.getText() instanceof Editable)) return; 2621 2622 if (updateSuggestions()) { 2623 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2624 mTextView.setCursorVisible(false); 2625 mIsShowingUp = true; 2626 super.show(); 2627 } 2628 } 2629 2630 @Override 2631 protected void measureContent() { 2632 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2633 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2634 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2635 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2636 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2637 2638 int width = 0; 2639 View view = null; 2640 for (int i = 0; i < mNumberOfSuggestions; i++) { 2641 view = mSuggestionsAdapter.getView(i, view, mContentView); 2642 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2643 view.measure(horizontalMeasure, verticalMeasure); 2644 width = Math.max(width, view.getMeasuredWidth()); 2645 } 2646 2647 // Enforce the width based on actual text widths 2648 mContentView.measure( 2649 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2650 verticalMeasure); 2651 2652 Drawable popupBackground = mPopupWindow.getBackground(); 2653 if (popupBackground != null) { 2654 if (mTempRect == null) mTempRect = new Rect(); 2655 popupBackground.getPadding(mTempRect); 2656 width += mTempRect.left + mTempRect.right; 2657 } 2658 mPopupWindow.setWidth(width); 2659 } 2660 2661 @Override 2662 protected int getTextOffset() { 2663 return mTextView.getSelectionStart(); 2664 } 2665 2666 @Override 2667 protected int getVerticalLocalPosition(int line) { 2668 return mTextView.getLayout().getLineBottom(line); 2669 } 2670 2671 @Override 2672 protected int clipVertically(int positionY) { 2673 final int height = mContentView.getMeasuredHeight(); 2674 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2675 return Math.min(positionY, displayMetrics.heightPixels - height); 2676 } 2677 2678 @Override 2679 public void hide() { 2680 super.hide(); 2681 } 2682 2683 private boolean updateSuggestions() { 2684 Spannable spannable = (Spannable) mTextView.getText(); 2685 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2686 2687 final int nbSpans = suggestionSpans.length; 2688 // Suggestions are shown after a delay: the underlying spans may have been removed 2689 if (nbSpans == 0) return false; 2690 2691 mNumberOfSuggestions = 0; 2692 int spanUnionStart = mTextView.getText().length(); 2693 int spanUnionEnd = 0; 2694 2695 SuggestionSpan misspelledSpan = null; 2696 int underlineColor = 0; 2697 2698 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2699 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2700 final int spanStart = spannable.getSpanStart(suggestionSpan); 2701 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2702 spanUnionStart = Math.min(spanStart, spanUnionStart); 2703 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2704 2705 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2706 misspelledSpan = suggestionSpan; 2707 } 2708 2709 // The first span dictates the background color of the highlighted text 2710 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2711 2712 String[] suggestions = suggestionSpan.getSuggestions(); 2713 int nbSuggestions = suggestions.length; 2714 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2715 String suggestion = suggestions[suggestionIndex]; 2716 2717 boolean suggestionIsDuplicate = false; 2718 for (int i = 0; i < mNumberOfSuggestions; i++) { 2719 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2720 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2721 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2722 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2723 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2724 suggestionIsDuplicate = true; 2725 break; 2726 } 2727 } 2728 } 2729 2730 if (!suggestionIsDuplicate) { 2731 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2732 suggestionInfo.suggestionSpan = suggestionSpan; 2733 suggestionInfo.suggestionIndex = suggestionIndex; 2734 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2735 2736 mNumberOfSuggestions++; 2737 2738 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2739 // Also end outer for loop 2740 spanIndex = nbSpans; 2741 break; 2742 } 2743 } 2744 } 2745 } 2746 2747 for (int i = 0; i < mNumberOfSuggestions; i++) { 2748 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2749 } 2750 2751 // Add "Add to dictionary" item if there is a span with the misspelled flag 2752 if (misspelledSpan != null) { 2753 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2754 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2755 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2756 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2757 suggestionInfo.suggestionSpan = misspelledSpan; 2758 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2759 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2760 getContext().getString(com.android.internal.R.string.addToDictionary)); 2761 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2762 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2763 2764 mNumberOfSuggestions++; 2765 } 2766 } 2767 2768 // Delete item 2769 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2770 suggestionInfo.suggestionSpan = null; 2771 suggestionInfo.suggestionIndex = DELETE_TEXT; 2772 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2773 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2774 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2775 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2776 mNumberOfSuggestions++; 2777 2778 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2779 if (underlineColor == 0) { 2780 // Fallback on the default highlight color when the first span does not provide one 2781 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2782 } else { 2783 final float BACKGROUND_TRANSPARENCY = 0.4f; 2784 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2785 mSuggestionRangeSpan.setBackgroundColor( 2786 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2787 } 2788 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2789 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2790 2791 mSuggestionsAdapter.notifyDataSetChanged(); 2792 return true; 2793 } 2794 2795 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2796 int unionEnd) { 2797 final Spannable text = (Spannable) mTextView.getText(); 2798 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2799 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2800 2801 // Adjust the start/end of the suggestion span 2802 suggestionInfo.suggestionStart = spanStart - unionStart; 2803 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2804 + suggestionInfo.text.length(); 2805 2806 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2807 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2808 2809 // Add the text before and after the span. 2810 final String textAsString = text.toString(); 2811 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2812 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2813 } 2814 2815 @Override 2816 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2817 Editable editable = (Editable) mTextView.getText(); 2818 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2819 2820 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2821 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2822 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2823 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2824 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2825 if (spanUnionEnd < editable.length() && 2826 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2827 (spanUnionStart == 0 || 2828 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2829 spanUnionEnd = spanUnionEnd + 1; 2830 } 2831 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2832 } 2833 hide(); 2834 return; 2835 } 2836 2837 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2838 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2839 if (spanStart < 0 || spanEnd <= spanStart) { 2840 // Span has been removed 2841 hide(); 2842 return; 2843 } 2844 2845 final String originalText = editable.toString().substring(spanStart, spanEnd); 2846 2847 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2848 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2849 intent.putExtra("word", originalText); 2850 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2851 // Put a listener to replace the original text with a word which the user 2852 // modified in a user dictionary dialog. 2853 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2854 mTextView.getContext().startActivity(intent); 2855 // There is no way to know if the word was indeed added. Re-check. 2856 // TODO The ExtractEditText should remove the span in the original text instead 2857 editable.removeSpan(suggestionInfo.suggestionSpan); 2858 Selection.setSelection(editable, spanEnd); 2859 updateSpellCheckSpans(spanStart, spanEnd, false); 2860 } else { 2861 // SuggestionSpans are removed by replace: save them before 2862 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2863 SuggestionSpan.class); 2864 final int length = suggestionSpans.length; 2865 int[] suggestionSpansStarts = new int[length]; 2866 int[] suggestionSpansEnds = new int[length]; 2867 int[] suggestionSpansFlags = new int[length]; 2868 for (int i = 0; i < length; i++) { 2869 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2870 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2871 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2872 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2873 2874 // Remove potential misspelled flags 2875 int suggestionSpanFlags = suggestionSpan.getFlags(); 2876 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2877 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2878 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2879 suggestionSpan.setFlags(suggestionSpanFlags); 2880 } 2881 } 2882 2883 final int suggestionStart = suggestionInfo.suggestionStart; 2884 final int suggestionEnd = suggestionInfo.suggestionEnd; 2885 final String suggestion = suggestionInfo.text.subSequence( 2886 suggestionStart, suggestionEnd).toString(); 2887 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2888 2889 // Notify source IME of the suggestion pick. Do this before 2890 // swaping texts. 2891 suggestionInfo.suggestionSpan.notifySelection( 2892 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 2893 2894 // Swap text content between actual text and Suggestion span 2895 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 2896 suggestions[suggestionInfo.suggestionIndex] = originalText; 2897 2898 // Restore previous SuggestionSpans 2899 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 2900 for (int i = 0; i < length; i++) { 2901 // Only spans that include the modified region make sense after replacement 2902 // Spans partially included in the replaced region are removed, there is no 2903 // way to assign them a valid range after replacement 2904 if (suggestionSpansStarts[i] <= spanStart && 2905 suggestionSpansEnds[i] >= spanEnd) { 2906 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2907 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 2908 } 2909 } 2910 2911 // Move cursor at the end of the replaced word 2912 final int newCursorPosition = spanEnd + lengthDifference; 2913 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2914 } 2915 2916 hide(); 2917 } 2918 } 2919 2920 /** 2921 * An ActionMode Callback class that is used to provide actions while in text selection mode. 2922 * 2923 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 2924 * on which of these this TextView supports. 2925 */ 2926 private class SelectionActionModeCallback implements ActionMode.Callback { 2927 2928 @Override 2929 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 2930 final boolean legacy = mTextView.getContext().getApplicationInfo().targetSdkVersion < 2931 Build.VERSION_CODES.LOLLIPOP; 2932 final Context context = !legacy && menu instanceof MenuBuilder ? 2933 ((MenuBuilder) menu).getContext() : 2934 mTextView.getContext(); 2935 final TypedArray styledAttributes = context.obtainStyledAttributes( 2936 com.android.internal.R.styleable.SelectionModeDrawables); 2937 2938 mode.setTitle(mTextView.getContext().getString( 2939 com.android.internal.R.string.textSelectionCABTitle)); 2940 mode.setSubtitle(null); 2941 mode.setTitleOptionalHint(true); 2942 2943 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 2944 setIcon(styledAttributes.getResourceId( 2945 R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0)). 2946 setAlphabeticShortcut('a'). 2947 setShowAsAction( 2948 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2949 2950 if (mTextView.canCut()) { 2951 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 2952 setIcon(styledAttributes.getResourceId( 2953 R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)). 2954 setAlphabeticShortcut('x'). 2955 setShowAsAction( 2956 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2957 } 2958 2959 if (mTextView.canCopy()) { 2960 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 2961 setIcon(styledAttributes.getResourceId( 2962 R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)). 2963 setAlphabeticShortcut('c'). 2964 setShowAsAction( 2965 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2966 } 2967 2968 if (mTextView.canPaste()) { 2969 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 2970 setIcon(styledAttributes.getResourceId( 2971 R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)). 2972 setAlphabeticShortcut('v'). 2973 setShowAsAction( 2974 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2975 } 2976 2977 if (mTextView.isSuggestionsEnabled() && isCursorInsideSuggestionSpan()) { 2978 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 2979 setShowAsAction( 2980 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2981 } 2982 2983 styledAttributes.recycle(); 2984 2985 if (mCustomSelectionActionModeCallback != null) { 2986 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 2987 // The custom mode can choose to cancel the action mode 2988 return false; 2989 } 2990 } 2991 2992 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 2993 mTextView.setHasTransientState(true); 2994 return true; 2995 } else { 2996 return false; 2997 } 2998 } 2999 3000 @Override 3001 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3002 if (mCustomSelectionActionModeCallback != null) { 3003 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3004 } 3005 return true; 3006 } 3007 3008 @Override 3009 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3010 if (mCustomSelectionActionModeCallback != null && 3011 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3012 return true; 3013 } 3014 if (item.getItemId() == TextView.ID_REPLACE) { 3015 onReplace(); 3016 return true; 3017 } 3018 return mTextView.onTextContextMenuItem(item.getItemId()); 3019 } 3020 3021 @Override 3022 public void onDestroyActionMode(ActionMode mode) { 3023 if (mCustomSelectionActionModeCallback != null) { 3024 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3025 } 3026 3027 /* 3028 * If we're ending this mode because we're detaching from a window, 3029 * we still have selection state to preserve. Don't clear it, we'll 3030 * bring back the selection mode when (if) we get reattached. 3031 */ 3032 if (!mPreserveDetachedSelection) { 3033 Selection.setSelection((Spannable) mTextView.getText(), 3034 mTextView.getSelectionEnd()); 3035 mTextView.setHasTransientState(false); 3036 } 3037 3038 if (mSelectionModifierCursorController != null) { 3039 mSelectionModifierCursorController.hide(); 3040 } 3041 3042 mSelectionActionMode = null; 3043 } 3044 } 3045 3046 private void onReplace() { 3047 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3048 stopSelectionActionMode(); 3049 Selection.setSelection((Spannable) mTextView.getText(), middle); 3050 showSuggestions(); 3051 } 3052 3053 private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener { 3054 private static final int POPUP_TEXT_LAYOUT = 3055 com.android.internal.R.layout.text_edit_action_popup_text; 3056 private TextView mPasteTextView; 3057 private TextView mReplaceTextView; 3058 3059 @Override 3060 protected void createPopupWindow() { 3061 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 3062 com.android.internal.R.attr.textSelectHandleWindowStyle); 3063 mPopupWindow.setClippingEnabled(true); 3064 } 3065 3066 @Override 3067 protected void initContentView() { 3068 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 3069 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 3070 mContentView = linearLayout; 3071 mContentView.setBackgroundResource( 3072 com.android.internal.R.drawable.text_edit_paste_window); 3073 3074 LayoutInflater inflater = (LayoutInflater) mTextView.getContext(). 3075 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 3076 3077 LayoutParams wrapContent = new LayoutParams( 3078 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 3079 3080 mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 3081 mPasteTextView.setLayoutParams(wrapContent); 3082 mContentView.addView(mPasteTextView); 3083 mPasteTextView.setText(com.android.internal.R.string.paste); 3084 mPasteTextView.setOnClickListener(this); 3085 3086 mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 3087 mReplaceTextView.setLayoutParams(wrapContent); 3088 mContentView.addView(mReplaceTextView); 3089 mReplaceTextView.setText(com.android.internal.R.string.replace); 3090 mReplaceTextView.setOnClickListener(this); 3091 } 3092 3093 @Override 3094 public void show() { 3095 boolean canPaste = mTextView.canPaste(); 3096 boolean canSuggest = mTextView.isSuggestionsEnabled() && isCursorInsideSuggestionSpan(); 3097 mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE); 3098 mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE); 3099 3100 if (!canPaste && !canSuggest) return; 3101 3102 super.show(); 3103 } 3104 3105 @Override 3106 public void onClick(View view) { 3107 if (view == mPasteTextView && mTextView.canPaste()) { 3108 mTextView.onTextContextMenuItem(TextView.ID_PASTE); 3109 hide(); 3110 } else if (view == mReplaceTextView) { 3111 onReplace(); 3112 } 3113 } 3114 3115 @Override 3116 protected int getTextOffset() { 3117 return (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3118 } 3119 3120 @Override 3121 protected int getVerticalLocalPosition(int line) { 3122 return mTextView.getLayout().getLineTop(line) - mContentView.getMeasuredHeight(); 3123 } 3124 3125 @Override 3126 protected int clipVertically(int positionY) { 3127 if (positionY < 0) { 3128 final int offset = getTextOffset(); 3129 final Layout layout = mTextView.getLayout(); 3130 final int line = layout.getLineForOffset(offset); 3131 positionY += layout.getLineBottom(line) - layout.getLineTop(line); 3132 positionY += mContentView.getMeasuredHeight(); 3133 3134 // Assumes insertion and selection handles share the same height 3135 final Drawable handle = mTextView.getContext().getDrawable( 3136 mTextView.mTextSelectHandleRes); 3137 positionY += handle.getIntrinsicHeight(); 3138 } 3139 3140 return positionY; 3141 } 3142 } 3143 3144 /** 3145 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3146 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3147 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3148 */ 3149 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3150 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3151 final int[] mTmpIntOffset = new int[2]; 3152 final Matrix mViewToScreenMatrix = new Matrix(); 3153 3154 @Override 3155 public void updatePosition(int parentPositionX, int parentPositionY, 3156 boolean parentPositionChanged, boolean parentScrolled) { 3157 final InputMethodState ims = mInputMethodState; 3158 if (ims == null || ims.mBatchEditNesting > 0) { 3159 return; 3160 } 3161 final InputMethodManager imm = InputMethodManager.peekInstance(); 3162 if (null == imm) { 3163 return; 3164 } 3165 if (!imm.isActive(mTextView)) { 3166 return; 3167 } 3168 // Skip if the IME has not requested the cursor/anchor position. 3169 if (!imm.isCursorAnchorInfoEnabled()) { 3170 return; 3171 } 3172 Layout layout = mTextView.getLayout(); 3173 if (layout == null) { 3174 return; 3175 } 3176 3177 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3178 builder.reset(); 3179 3180 final int selectionStart = mTextView.getSelectionStart(); 3181 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3182 3183 // Construct transformation matrix from view local coordinates to screen coordinates. 3184 mViewToScreenMatrix.set(mTextView.getMatrix()); 3185 mTextView.getLocationOnScreen(mTmpIntOffset); 3186 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3187 builder.setMatrix(mViewToScreenMatrix); 3188 3189 final float viewportToContentHorizontalOffset = 3190 mTextView.viewportToContentHorizontalOffset(); 3191 final float viewportToContentVerticalOffset = 3192 mTextView.viewportToContentVerticalOffset(); 3193 3194 final CharSequence text = mTextView.getText(); 3195 if (text instanceof Spannable) { 3196 final Spannable sp = (Spannable) text; 3197 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3198 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3199 if (composingTextEnd < composingTextStart) { 3200 final int temp = composingTextEnd; 3201 composingTextEnd = composingTextStart; 3202 composingTextStart = temp; 3203 } 3204 final boolean hasComposingText = 3205 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3206 if (hasComposingText) { 3207 final CharSequence composingText = text.subSequence(composingTextStart, 3208 composingTextEnd); 3209 builder.setComposingText(composingTextStart, composingText); 3210 3211 final int minLine = layout.getLineForOffset(composingTextStart); 3212 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3213 for (int line = minLine; line <= maxLine; ++line) { 3214 final int lineStart = layout.getLineStart(line); 3215 final int lineEnd = layout.getLineEnd(line); 3216 final int offsetStart = Math.max(lineStart, composingTextStart); 3217 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3218 final boolean ltrLine = 3219 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3220 final float[] widths = new float[offsetEnd - offsetStart]; 3221 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3222 final float top = layout.getLineTop(line); 3223 final float bottom = layout.getLineBottom(line); 3224 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3225 final float charWidth = widths[offset - offsetStart]; 3226 final boolean isRtl = layout.isRtlCharAt(offset); 3227 final float primary = layout.getPrimaryHorizontal(offset); 3228 final float secondary = layout.getSecondaryHorizontal(offset); 3229 // TODO: This doesn't work perfectly for text with custom styles and 3230 // TAB chars. 3231 final float left; 3232 final float right; 3233 if (ltrLine) { 3234 if (isRtl) { 3235 left = secondary - charWidth; 3236 right = secondary; 3237 } else { 3238 left = primary; 3239 right = primary + charWidth; 3240 } 3241 } else { 3242 if (!isRtl) { 3243 left = secondary; 3244 right = secondary + charWidth; 3245 } else { 3246 left = primary - charWidth; 3247 right = primary; 3248 } 3249 } 3250 // TODO: Check top-right and bottom-left as well. 3251 final float localLeft = left + viewportToContentHorizontalOffset; 3252 final float localRight = right + viewportToContentHorizontalOffset; 3253 final float localTop = top + viewportToContentVerticalOffset; 3254 final float localBottom = bottom + viewportToContentVerticalOffset; 3255 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3256 final boolean isBottomRightVisible = 3257 isPositionVisible(localRight, localBottom); 3258 int characterBoundsFlags = 0; 3259 if (isTopLeftVisible || isBottomRightVisible) { 3260 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3261 } 3262 if (!isTopLeftVisible || !isTopLeftVisible) { 3263 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3264 } 3265 if (isRtl) { 3266 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3267 } 3268 // Here offset is the index in Java chars. 3269 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3270 localBottom, characterBoundsFlags); 3271 } 3272 } 3273 } 3274 } 3275 3276 // Treat selectionStart as the insertion point. 3277 if (0 <= selectionStart) { 3278 final int offset = selectionStart; 3279 final int line = layout.getLineForOffset(offset); 3280 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3281 + viewportToContentHorizontalOffset; 3282 final float insertionMarkerTop = layout.getLineTop(line) 3283 + viewportToContentVerticalOffset; 3284 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3285 + viewportToContentVerticalOffset; 3286 final float insertionMarkerBottom = layout.getLineBottom(line) 3287 + viewportToContentVerticalOffset; 3288 final boolean isTopVisible = 3289 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3290 final boolean isBottomVisible = 3291 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3292 int insertionMarkerFlags = 0; 3293 if (isTopVisible || isBottomVisible) { 3294 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3295 } 3296 if (!isTopVisible || !isBottomVisible) { 3297 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3298 } 3299 if (layout.isRtlCharAt(offset)) { 3300 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3301 } 3302 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3303 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3304 } 3305 3306 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3307 } 3308 } 3309 3310 private abstract class HandleView extends View implements TextViewPositionListener { 3311 protected Drawable mDrawable; 3312 protected Drawable mDrawableLtr; 3313 protected Drawable mDrawableRtl; 3314 private final PopupWindow mContainer; 3315 // Position with respect to the parent TextView 3316 private int mPositionX, mPositionY; 3317 private boolean mIsDragging; 3318 // Offset from touch position to mPosition 3319 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3320 protected int mHotspotX; 3321 protected int mHorizontalGravity; 3322 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3323 private float mTouchOffsetY; 3324 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3325 private float mIdealVerticalOffset; 3326 // Parent's (TextView) previous position in window 3327 private int mLastParentX, mLastParentY; 3328 // Transient action popup window for Paste and Replace actions 3329 protected ActionPopupWindow mActionPopupWindow; 3330 // Previous text character offset 3331 private int mPreviousOffset = -1; 3332 // Previous text character offset 3333 private boolean mPositionHasChanged = true; 3334 // Used to delay the appearance of the action popup window 3335 private Runnable mActionPopupShower; 3336 // Minimum touch target size for handles 3337 private int mMinSize; 3338 // Indicates the line of text that the handle is on. 3339 protected int mLine = -1; 3340 3341 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3342 super(mTextView.getContext()); 3343 mContainer = new PopupWindow(mTextView.getContext(), null, 3344 com.android.internal.R.attr.textSelectHandleWindowStyle); 3345 mContainer.setSplitTouchEnabled(true); 3346 mContainer.setClippingEnabled(false); 3347 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3348 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3349 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3350 mContainer.setContentView(this); 3351 3352 mDrawableLtr = drawableLtr; 3353 mDrawableRtl = drawableRtl; 3354 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3355 com.android.internal.R.dimen.text_handle_min_size); 3356 3357 updateDrawable(); 3358 3359 final int handleHeight = getPreferredHeight(); 3360 mTouchOffsetY = -0.3f * handleHeight; 3361 mIdealVerticalOffset = 0.7f * handleHeight; 3362 } 3363 3364 protected void updateDrawable() { 3365 final int offset = getCurrentCursorOffset(); 3366 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3367 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3368 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3369 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3370 } 3371 3372 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3373 protected abstract int getHorizontalGravity(boolean isRtlRun); 3374 3375 // Touch-up filter: number of previous positions remembered 3376 private static final int HISTORY_SIZE = 5; 3377 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3378 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3379 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3380 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3381 private int mPreviousOffsetIndex = 0; 3382 private int mNumberPreviousOffsets = 0; 3383 3384 private void startTouchUpFilter(int offset) { 3385 mNumberPreviousOffsets = 0; 3386 addPositionToTouchUpFilter(offset); 3387 } 3388 3389 private void addPositionToTouchUpFilter(int offset) { 3390 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3391 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3392 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3393 mNumberPreviousOffsets++; 3394 } 3395 3396 private void filterOnTouchUp() { 3397 final long now = SystemClock.uptimeMillis(); 3398 int i = 0; 3399 int index = mPreviousOffsetIndex; 3400 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3401 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3402 i++; 3403 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3404 } 3405 3406 if (i > 0 && i < iMax && 3407 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3408 positionAtCursorOffset(mPreviousOffsets[index], false); 3409 } 3410 } 3411 3412 public boolean offsetHasBeenChanged() { 3413 return mNumberPreviousOffsets > 1; 3414 } 3415 3416 @Override 3417 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3418 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3419 } 3420 3421 private int getPreferredWidth() { 3422 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3423 } 3424 3425 private int getPreferredHeight() { 3426 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3427 } 3428 3429 public void show() { 3430 if (isShowing()) return; 3431 3432 getPositionListener().addSubscriber(this, true /* local position may change */); 3433 3434 // Make sure the offset is always considered new, even when focusing at same position 3435 mPreviousOffset = -1; 3436 positionAtCursorOffset(getCurrentCursorOffset(), false); 3437 3438 hideActionPopupWindow(); 3439 } 3440 3441 protected void dismiss() { 3442 mIsDragging = false; 3443 mContainer.dismiss(); 3444 onDetached(); 3445 } 3446 3447 public void hide() { 3448 dismiss(); 3449 3450 getPositionListener().removeSubscriber(this); 3451 } 3452 3453 void showActionPopupWindow(int delay) { 3454 if (mActionPopupWindow == null) { 3455 mActionPopupWindow = new ActionPopupWindow(); 3456 } 3457 if (mActionPopupShower == null) { 3458 mActionPopupShower = new Runnable() { 3459 public void run() { 3460 mActionPopupWindow.show(); 3461 } 3462 }; 3463 } else { 3464 mTextView.removeCallbacks(mActionPopupShower); 3465 } 3466 mTextView.postDelayed(mActionPopupShower, delay); 3467 } 3468 3469 protected void hideActionPopupWindow() { 3470 if (mActionPopupShower != null) { 3471 mTextView.removeCallbacks(mActionPopupShower); 3472 } 3473 if (mActionPopupWindow != null) { 3474 mActionPopupWindow.hide(); 3475 } 3476 } 3477 3478 public boolean isShowing() { 3479 return mContainer.isShowing(); 3480 } 3481 3482 private boolean isVisible() { 3483 // Always show a dragging handle. 3484 if (mIsDragging) { 3485 return true; 3486 } 3487 3488 if (mTextView.isInBatchEditMode()) { 3489 return false; 3490 } 3491 3492 return isPositionVisible(mPositionX + mHotspotX, mPositionY); 3493 } 3494 3495 public abstract int getCurrentCursorOffset(); 3496 3497 protected abstract void updateSelection(int offset); 3498 3499 public abstract void updatePosition(float x, float y); 3500 3501 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3502 // A HandleView relies on the layout, which may be nulled by external methods 3503 Layout layout = mTextView.getLayout(); 3504 if (layout == null) { 3505 // Will update controllers' state, hiding them and stopping selection mode if needed 3506 prepareCursorControllers(); 3507 return; 3508 } 3509 3510 boolean offsetChanged = offset != mPreviousOffset; 3511 if (offsetChanged || parentScrolled) { 3512 if (offsetChanged) { 3513 updateSelection(offset); 3514 addPositionToTouchUpFilter(offset); 3515 } 3516 final int line = layout.getLineForOffset(offset); 3517 mLine = line; 3518 3519 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3520 getHorizontalOffset() + getCursorOffset()); 3521 mPositionY = layout.getLineBottom(line); 3522 3523 // Take TextView's padding and scroll into account. 3524 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3525 mPositionY += mTextView.viewportToContentVerticalOffset(); 3526 3527 mPreviousOffset = offset; 3528 mPositionHasChanged = true; 3529 } 3530 } 3531 3532 public void updatePosition(int parentPositionX, int parentPositionY, 3533 boolean parentPositionChanged, boolean parentScrolled) { 3534 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3535 if (parentPositionChanged || mPositionHasChanged) { 3536 if (mIsDragging) { 3537 // Update touchToWindow offset in case of parent scrolling while dragging 3538 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3539 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3540 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3541 mLastParentX = parentPositionX; 3542 mLastParentY = parentPositionY; 3543 } 3544 3545 onHandleMoved(); 3546 } 3547 3548 if (isVisible()) { 3549 final int positionX = parentPositionX + mPositionX; 3550 final int positionY = parentPositionY + mPositionY; 3551 if (isShowing()) { 3552 mContainer.update(positionX, positionY, -1, -1); 3553 } else { 3554 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3555 positionX, positionY); 3556 } 3557 } else { 3558 if (isShowing()) { 3559 dismiss(); 3560 } 3561 } 3562 3563 mPositionHasChanged = false; 3564 } 3565 } 3566 3567 public void showAtLocation(int offset) { 3568 // TODO - investigate if there's a better way to show the handles 3569 // after the drag accelerator has occured. 3570 int[] tmpCords = new int[2]; 3571 mTextView.getLocationInWindow(tmpCords); 3572 3573 Layout layout = mTextView.getLayout(); 3574 int posX = tmpCords[0]; 3575 int posY = tmpCords[1]; 3576 3577 final int line = layout.getLineForOffset(offset); 3578 3579 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3580 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3581 int startY = layout.getLineBottom(line); 3582 3583 // Take TextView's padding and scroll into account. 3584 startX += mTextView.viewportToContentHorizontalOffset(); 3585 startY += mTextView.viewportToContentVerticalOffset(); 3586 3587 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3588 startX + posX, startY + posY); 3589 } 3590 3591 @Override 3592 protected void onDraw(Canvas c) { 3593 final int drawWidth = mDrawable.getIntrinsicWidth(); 3594 final int left = getHorizontalOffset(); 3595 3596 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3597 mDrawable.draw(c); 3598 } 3599 3600 private int getHorizontalOffset() { 3601 final int width = getPreferredWidth(); 3602 final int drawWidth = mDrawable.getIntrinsicWidth(); 3603 final int left; 3604 switch (mHorizontalGravity) { 3605 case Gravity.LEFT: 3606 left = 0; 3607 break; 3608 default: 3609 case Gravity.CENTER: 3610 left = (width - drawWidth) / 2; 3611 break; 3612 case Gravity.RIGHT: 3613 left = width - drawWidth; 3614 break; 3615 } 3616 return left; 3617 } 3618 3619 protected int getCursorOffset() { 3620 return 0; 3621 } 3622 3623 @Override 3624 public boolean onTouchEvent(MotionEvent ev) { 3625 switch (ev.getActionMasked()) { 3626 case MotionEvent.ACTION_DOWN: { 3627 startTouchUpFilter(getCurrentCursorOffset()); 3628 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3629 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3630 3631 final PositionListener positionListener = getPositionListener(); 3632 mLastParentX = positionListener.getPositionX(); 3633 mLastParentY = positionListener.getPositionY(); 3634 mIsDragging = true; 3635 break; 3636 } 3637 3638 case MotionEvent.ACTION_MOVE: { 3639 final float rawX = ev.getRawX(); 3640 final float rawY = ev.getRawY(); 3641 3642 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3643 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3644 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3645 float newVerticalOffset; 3646 if (previousVerticalOffset < mIdealVerticalOffset) { 3647 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3648 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3649 } else { 3650 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3651 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3652 } 3653 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3654 3655 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3656 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3657 3658 updatePosition(newPosX, newPosY); 3659 break; 3660 } 3661 3662 case MotionEvent.ACTION_UP: 3663 filterOnTouchUp(); 3664 mIsDragging = false; 3665 break; 3666 3667 case MotionEvent.ACTION_CANCEL: 3668 mIsDragging = false; 3669 break; 3670 } 3671 return true; 3672 } 3673 3674 public boolean isDragging() { 3675 return mIsDragging; 3676 } 3677 3678 void onHandleMoved() { 3679 hideActionPopupWindow(); 3680 } 3681 3682 public void onDetached() { 3683 hideActionPopupWindow(); 3684 } 3685 } 3686 3687 private class InsertionHandleView extends HandleView { 3688 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3689 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3690 3691 // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow 3692 private float mDownPositionX, mDownPositionY; 3693 private Runnable mHider; 3694 3695 public InsertionHandleView(Drawable drawable) { 3696 super(drawable, drawable); 3697 } 3698 3699 @Override 3700 public void show() { 3701 super.show(); 3702 3703 final long durationSinceCutOrCopy = 3704 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3705 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3706 showActionPopupWindow(0); 3707 } 3708 3709 hideAfterDelay(); 3710 } 3711 3712 public void showWithActionPopup() { 3713 show(); 3714 showActionPopupWindow(0); 3715 } 3716 3717 private void hideAfterDelay() { 3718 if (mHider == null) { 3719 mHider = new Runnable() { 3720 public void run() { 3721 hide(); 3722 } 3723 }; 3724 } else { 3725 removeHiderCallback(); 3726 } 3727 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3728 } 3729 3730 private void removeHiderCallback() { 3731 if (mHider != null) { 3732 mTextView.removeCallbacks(mHider); 3733 } 3734 } 3735 3736 @Override 3737 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3738 return drawable.getIntrinsicWidth() / 2; 3739 } 3740 3741 @Override 3742 protected int getHorizontalGravity(boolean isRtlRun) { 3743 return Gravity.CENTER_HORIZONTAL; 3744 } 3745 3746 @Override 3747 protected int getCursorOffset() { 3748 int offset = super.getCursorOffset(); 3749 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3750 if (cursor != null) { 3751 cursor.getPadding(mTempRect); 3752 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3753 } 3754 return offset; 3755 } 3756 3757 @Override 3758 public boolean onTouchEvent(MotionEvent ev) { 3759 final boolean result = super.onTouchEvent(ev); 3760 3761 switch (ev.getActionMasked()) { 3762 case MotionEvent.ACTION_DOWN: 3763 mDownPositionX = ev.getRawX(); 3764 mDownPositionY = ev.getRawY(); 3765 break; 3766 3767 case MotionEvent.ACTION_UP: 3768 if (!offsetHasBeenChanged()) { 3769 final float deltaX = mDownPositionX - ev.getRawX(); 3770 final float deltaY = mDownPositionY - ev.getRawY(); 3771 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3772 3773 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3774 mTextView.getContext()); 3775 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3776 3777 if (distanceSquared < touchSlop * touchSlop) { 3778 if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) { 3779 // Tapping on the handle dismisses the displayed action popup 3780 mActionPopupWindow.hide(); 3781 } else { 3782 showWithActionPopup(); 3783 } 3784 } 3785 } 3786 hideAfterDelay(); 3787 break; 3788 3789 case MotionEvent.ACTION_CANCEL: 3790 hideAfterDelay(); 3791 break; 3792 3793 default: 3794 break; 3795 } 3796 3797 return result; 3798 } 3799 3800 @Override 3801 public int getCurrentCursorOffset() { 3802 return mTextView.getSelectionStart(); 3803 } 3804 3805 @Override 3806 public void updateSelection(int offset) { 3807 Selection.setSelection((Spannable) mTextView.getText(), offset); 3808 } 3809 3810 @Override 3811 public void updatePosition(float x, float y) { 3812 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3813 } 3814 3815 @Override 3816 void onHandleMoved() { 3817 super.onHandleMoved(); 3818 removeHiderCallback(); 3819 } 3820 3821 @Override 3822 public void onDetached() { 3823 super.onDetached(); 3824 removeHiderCallback(); 3825 } 3826 } 3827 3828 private class SelectionStartHandleView extends HandleView { 3829 // The previous offset this handle was at. 3830 private int mPrevOffset; 3831 // Indicates whether the cursor is making adjustments within a word. 3832 private boolean mInWord = false; 3833 // Offset to track difference between touch and word boundary. 3834 protected int mTouchWordOffset; 3835 3836 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3837 super(drawableLtr, drawableRtl); 3838 } 3839 3840 @Override 3841 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3842 return isRtlRun ? 0 : drawable.getIntrinsicWidth(); 3843 } 3844 3845 @Override 3846 protected int getHorizontalGravity(boolean isRtlRun) { 3847 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 3848 } 3849 3850 @Override 3851 public int getCurrentCursorOffset() { 3852 return mTextView.getSelectionStart(); 3853 } 3854 3855 @Override 3856 public void updateSelection(int offset) { 3857 Selection.setSelection((Spannable) mTextView.getText(), offset, 3858 mTextView.getSelectionEnd()); 3859 updateDrawable(); 3860 } 3861 3862 @Override 3863 public void updatePosition(float x, float y) { 3864 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3865 final int currLine = mTextView.getLineAtCoordinate(y); 3866 int offset = trueOffset; 3867 boolean positionCursor = false; 3868 3869 int end = getWordEnd(offset, true); 3870 int start = getWordStart(offset); 3871 3872 if (offset < mPrevOffset) { 3873 // User is increasing the selection. 3874 if (!mInWord || currLine < mLine) { 3875 // We're not in a word, or we're on a different line so we'll expand by 3876 // word. First ensure the user has at least entered the next word. 3877 int offsetToWord = Math.min((end - start) / 2, 2); 3878 if (offset <= end - offsetToWord || currLine < mLine) { 3879 offset = start; 3880 } else { 3881 offset = mPrevOffset; 3882 } 3883 } 3884 mPrevOffset = offset; 3885 mTouchWordOffset = Math.max(trueOffset - offset, 0); 3886 mInWord = !isStartBoundary(offset); 3887 positionCursor = true; 3888 } else if (offset - mTouchWordOffset > mPrevOffset) { 3889 // User is shrinking the selection. 3890 if (currLine > mLine) { 3891 // We're on a different line, so we'll snap to word boundaries. 3892 offset = end; 3893 } 3894 offset -= mTouchWordOffset; 3895 mPrevOffset = offset; 3896 mInWord = !isEndBoundary(offset); 3897 positionCursor = true; 3898 } 3899 3900 // Handles can not cross and selection is at least one character. 3901 if (positionCursor) { 3902 final int selectionEnd = mTextView.getSelectionEnd(); 3903 if (offset >= selectionEnd) { 3904 // We can't cross the handles so let's just constrain the Y value. 3905 int alteredOffset = mTextView.getOffsetAtCoordinate(mLine, x); 3906 if (alteredOffset >= selectionEnd) { 3907 // Can't pass the other drag handle. 3908 offset = Math.max(0, selectionEnd - 1); 3909 } else { 3910 offset = alteredOffset; 3911 } 3912 } 3913 positionAtCursorOffset(offset, false); 3914 } 3915 } 3916 3917 public ActionPopupWindow getActionPopupWindow() { 3918 return mActionPopupWindow; 3919 } 3920 3921 @Override 3922 public boolean onTouchEvent(MotionEvent event) { 3923 boolean superResult = super.onTouchEvent(event); 3924 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 3925 // Reset the touch word offset when the user has lifted their finger. 3926 mTouchWordOffset = 0; 3927 } 3928 return superResult; 3929 } 3930 } 3931 3932 private class SelectionEndHandleView extends HandleView { 3933 // The previous offset this handle was at. 3934 private int mPrevOffset; 3935 // Indicates whether the cursor is making adjustments within a word. 3936 private boolean mInWord = false; 3937 // Offset to track difference between touch and word boundary. 3938 protected int mTouchWordOffset; 3939 3940 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3941 super(drawableLtr, drawableRtl); 3942 } 3943 3944 @Override 3945 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3946 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 3947 } 3948 3949 @Override 3950 protected int getHorizontalGravity(boolean isRtlRun) { 3951 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 3952 } 3953 3954 @Override 3955 public int getCurrentCursorOffset() { 3956 return mTextView.getSelectionEnd(); 3957 } 3958 3959 @Override 3960 public void updateSelection(int offset) { 3961 Selection.setSelection((Spannable) mTextView.getText(), 3962 mTextView.getSelectionStart(), offset); 3963 updateDrawable(); 3964 } 3965 3966 @Override 3967 public void updatePosition(float x, float y) { 3968 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3969 final int currLine = mTextView.getLineAtCoordinate(y); 3970 int offset = trueOffset; 3971 boolean positionCursor = false; 3972 3973 int end = getWordEnd(offset, true); 3974 int start = getWordStart(offset); 3975 3976 if (offset > mPrevOffset) { 3977 // User is increasing the selection. 3978 if (!mInWord || currLine > mLine) { 3979 // We're not in a word, or we're on a different line so we'll expand by 3980 // word. First ensure the user has at least entered the next word. 3981 int midPoint = Math.min((end - start) / 2, 2); 3982 if (offset >= start + midPoint || currLine > mLine) { 3983 offset = end; 3984 } else { 3985 offset = mPrevOffset; 3986 } 3987 } 3988 mPrevOffset = offset; 3989 mTouchWordOffset = Math.max(offset - trueOffset, 0); 3990 mInWord = !isEndBoundary(offset); 3991 positionCursor = true; 3992 } else if (offset + mTouchWordOffset < mPrevOffset) { 3993 // User is shrinking the selection. 3994 if (currLine > mLine) { 3995 // We're on a different line, so we'll snap to word boundaries. 3996 offset = getWordStart(offset); 3997 } 3998 offset += mTouchWordOffset; 3999 mPrevOffset = offset; 4000 positionCursor = true; 4001 mInWord = !isStartBoundary(offset); 4002 } 4003 4004 if (positionCursor) { 4005 final int selectionStart = mTextView.getSelectionStart(); 4006 if (offset <= selectionStart) { 4007 // We can't cross the handles so let's just constrain the Y value. 4008 int alteredOffset = mTextView.getOffsetAtCoordinate(mLine, x); 4009 int length = mTextView.getText().length(); 4010 if (alteredOffset <= selectionStart) { 4011 // Can't pass the other drag handle. 4012 offset = Math.min(selectionStart + 1, length); 4013 } else { 4014 offset = Math.min(alteredOffset, length); 4015 } 4016 } 4017 positionAtCursorOffset(offset, false); 4018 } 4019 } 4020 4021 public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) { 4022 mActionPopupWindow = actionPopupWindow; 4023 } 4024 4025 @Override 4026 public boolean onTouchEvent(MotionEvent event) { 4027 boolean superResult = super.onTouchEvent(event); 4028 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4029 // Reset the touch word offset when the user has lifted their finger. 4030 mTouchWordOffset = 0; 4031 } 4032 return superResult; 4033 } 4034 } 4035 4036 /** 4037 * A CursorController instance can be used to control a cursor in the text. 4038 */ 4039 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4040 /** 4041 * Makes the cursor controller visible on screen. 4042 * See also {@link #hide()}. 4043 */ 4044 public void show(); 4045 4046 /** 4047 * Hide the cursor controller from screen. 4048 * See also {@link #show()}. 4049 */ 4050 public void hide(); 4051 4052 /** 4053 * Called when the view is detached from window. Perform house keeping task, such as 4054 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4055 * preventing the activity from being recycled. 4056 */ 4057 public void onDetached(); 4058 } 4059 4060 private class InsertionPointCursorController implements CursorController { 4061 private InsertionHandleView mHandle; 4062 4063 public void show() { 4064 getHandle().show(); 4065 } 4066 4067 public void showWithActionPopup() { 4068 getHandle().showWithActionPopup(); 4069 } 4070 4071 public void hide() { 4072 if (mHandle != null) { 4073 mHandle.hide(); 4074 } 4075 } 4076 4077 public void onTouchModeChanged(boolean isInTouchMode) { 4078 if (!isInTouchMode) { 4079 hide(); 4080 } 4081 } 4082 4083 private InsertionHandleView getHandle() { 4084 if (mSelectHandleCenter == null) { 4085 mSelectHandleCenter = mTextView.getContext().getDrawable( 4086 mTextView.mTextSelectHandleRes); 4087 } 4088 if (mHandle == null) { 4089 mHandle = new InsertionHandleView(mSelectHandleCenter); 4090 } 4091 return mHandle; 4092 } 4093 4094 @Override 4095 public void onDetached() { 4096 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4097 observer.removeOnTouchModeChangeListener(this); 4098 4099 if (mHandle != null) mHandle.onDetached(); 4100 } 4101 } 4102 4103 class SelectionModifierCursorController implements CursorController { 4104 private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds 4105 // The cursor controller handles, lazily created when shown. 4106 private SelectionStartHandleView mStartHandle; 4107 private SelectionEndHandleView mEndHandle; 4108 // The offsets of that last touch down event. Remembered to start selection there. 4109 private int mMinTouchOffset, mMaxTouchOffset; 4110 4111 // Double tap detection 4112 private long mPreviousTapUpTime = 0; 4113 private float mDownPositionX, mDownPositionY; 4114 private boolean mGestureStayedInTapRegion; 4115 4116 // Where the user first starts the drag motion. 4117 private int mStartOffset = -1; 4118 // Indicates whether the user is selecting text and using the drag accelerator. 4119 private boolean mDragAcceleratorActive; 4120 4121 SelectionModifierCursorController() { 4122 resetTouchOffsets(); 4123 } 4124 4125 public void show() { 4126 if (mTextView.isInBatchEditMode()) { 4127 return; 4128 } 4129 initDrawables(); 4130 initHandles(); 4131 hideInsertionPointCursorController(); 4132 } 4133 4134 private void initDrawables() { 4135 if (mSelectHandleLeft == null) { 4136 mSelectHandleLeft = mTextView.getContext().getDrawable( 4137 mTextView.mTextSelectHandleLeftRes); 4138 } 4139 if (mSelectHandleRight == null) { 4140 mSelectHandleRight = mTextView.getContext().getDrawable( 4141 mTextView.mTextSelectHandleRightRes); 4142 } 4143 } 4144 4145 private void initHandles() { 4146 // Lazy object creation has to be done before updatePosition() is called. 4147 if (mStartHandle == null) { 4148 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4149 } 4150 if (mEndHandle == null) { 4151 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4152 } 4153 4154 mStartHandle.show(); 4155 mEndHandle.show(); 4156 4157 // Make sure both left and right handles share the same ActionPopupWindow (so that 4158 // moving any of the handles hides the action popup). 4159 mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION); 4160 mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow()); 4161 4162 hideInsertionPointCursorController(); 4163 } 4164 4165 public void hide() { 4166 if (mStartHandle != null) mStartHandle.hide(); 4167 if (mEndHandle != null) mEndHandle.hide(); 4168 } 4169 4170 public void enterDrag() { 4171 // Just need to init the handles / hide insertion cursor. 4172 show(); 4173 mDragAcceleratorActive = true; 4174 // Start location of selection. 4175 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4176 mLastDownPositionY); 4177 // Don't show the handles until user has lifted finger. 4178 hide(); 4179 4180 // This stops scrolling parents from intercepting the touch event, allowing 4181 // the user to continue dragging across the screen to select text; TextView will 4182 // scroll as necessary. 4183 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4184 } 4185 4186 public void onTouchEvent(MotionEvent event) { 4187 // This is done even when the View does not have focus, so that long presses can start 4188 // selection and tap can move cursor from this tap position. 4189 switch (event.getActionMasked()) { 4190 case MotionEvent.ACTION_DOWN: 4191 final float x = event.getX(); 4192 final float y = event.getY(); 4193 4194 // Remember finger down position, to be able to start selection from there. 4195 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4196 4197 // Double tap detection 4198 if (mGestureStayedInTapRegion) { 4199 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 4200 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 4201 final float deltaX = x - mDownPositionX; 4202 final float deltaY = y - mDownPositionY; 4203 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4204 4205 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4206 mTextView.getContext()); 4207 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4208 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4209 4210 if (stayedInArea && isPositionOnText(x, y)) { 4211 startSelectionActionMode(); 4212 mDiscardNextActionUp = true; 4213 } 4214 } 4215 } 4216 4217 mDownPositionX = x; 4218 mDownPositionY = y; 4219 mGestureStayedInTapRegion = true; 4220 break; 4221 4222 case MotionEvent.ACTION_POINTER_DOWN: 4223 case MotionEvent.ACTION_POINTER_UP: 4224 // Handle multi-point gestures. Keep min and max offset positions. 4225 // Only activated for devices that correctly handle multi-touch. 4226 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4227 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4228 updateMinAndMaxOffsets(event); 4229 } 4230 break; 4231 4232 case MotionEvent.ACTION_MOVE: 4233 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4234 mTextView.getContext()); 4235 4236 if (mGestureStayedInTapRegion) { 4237 final float deltaX = event.getX() - mDownPositionX; 4238 final float deltaY = event.getY() - mDownPositionY; 4239 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4240 4241 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4242 4243 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4244 mGestureStayedInTapRegion = false; 4245 } 4246 } 4247 4248 if (mStartHandle != null && mStartHandle.isShowing()) { 4249 // Don't do the drag if the handles are showing already. 4250 break; 4251 } 4252 4253 if (mStartOffset != -1) { 4254 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4255 event.getY()); 4256 int offset = rawOffset; 4257 4258 // We don't start "dragging" until the user is past the initial word that 4259 // gets selected on long press. 4260 int firstWordStart = getWordStart(mStartOffset); 4261 int firstWordEnd = getWordEnd(mStartOffset, false); 4262 if (offset > firstWordEnd || offset < firstWordStart) { 4263 4264 // Basically the goal in the below code is to have the highlight be 4265 // offset so that your finger isn't covering the end point. 4266 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4267 float mx = event.getX(); 4268 float my = event.getY(); 4269 if (mx > fingerOffset) mx -= fingerOffset; 4270 if (my > fingerOffset) my -= fingerOffset; 4271 offset = mTextView.getOffsetForPosition(mx, my); 4272 4273 // Perform the check for closeness at edge of view, if we're very close 4274 // don't adjust the offset to be in front of the finger - otherwise the 4275 // user can't select words at the edge. 4276 if (mTextView.getWidth() - fingerOffset > mx) { 4277 // We're going by word, so we need to make sure that the offset 4278 // that we get is within this, so we'll get the previous boundary. 4279 final WordIterator wordIterator = getWordIteratorWithText(); 4280 4281 final int precedingOffset = wordIterator.preceding(offset); 4282 if (mStartOffset < offset) { 4283 // Expanding with bottom handle, in this case the selection end 4284 // is before the finger. 4285 offset = Math.max(precedingOffset - 1, 0); 4286 } else { 4287 // Expand with the start handle, in this case the selection 4288 // start is before the finger. 4289 if (precedingOffset == WordIterator.DONE) { 4290 offset = 0; 4291 } else { 4292 offset = wordIterator.preceding(precedingOffset); 4293 } 4294 } 4295 } 4296 if (offset == WordIterator.DONE) 4297 offset = rawOffset; 4298 4299 // Need to adjust start offset based on direction of movement. 4300 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4301 : getWordEnd(mStartOffset, true); 4302 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4303 offset); 4304 } 4305 } 4306 break; 4307 4308 case MotionEvent.ACTION_UP: 4309 mPreviousTapUpTime = SystemClock.uptimeMillis(); 4310 if (mDragAcceleratorActive) { 4311 // No longer dragging to select text, let the parent intercept events. 4312 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4313 4314 show(); 4315 int startOffset = mTextView.getSelectionStart(); 4316 int endOffset = mTextView.getSelectionEnd(); 4317 4318 // Since we don't let drag handles pass once they're visible, we need to 4319 // make sure the start / end locations are correct because the user *can* 4320 // switch directions during the initial drag. 4321 if (endOffset < startOffset) { 4322 int tmp = endOffset; 4323 endOffset = startOffset; 4324 startOffset = tmp; 4325 4326 // Also update the selection with the right offsets in this case. 4327 Selection.setSelection((Spannable) mTextView.getText(), 4328 startOffset, endOffset); 4329 } 4330 4331 // Need to do this to display the handles. 4332 mStartHandle.showAtLocation(startOffset); 4333 mEndHandle.showAtLocation(endOffset); 4334 4335 // No longer the first dragging motion, reset. 4336 mDragAcceleratorActive = false; 4337 mStartOffset = -1; 4338 } 4339 break; 4340 } 4341 } 4342 4343 /** 4344 * @param event 4345 */ 4346 private void updateMinAndMaxOffsets(MotionEvent event) { 4347 int pointerCount = event.getPointerCount(); 4348 for (int index = 0; index < pointerCount; index++) { 4349 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4350 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4351 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4352 } 4353 } 4354 4355 public int getMinTouchOffset() { 4356 return mMinTouchOffset; 4357 } 4358 4359 public int getMaxTouchOffset() { 4360 return mMaxTouchOffset; 4361 } 4362 4363 public void resetTouchOffsets() { 4364 mMinTouchOffset = mMaxTouchOffset = -1; 4365 mStartOffset = -1; 4366 mDragAcceleratorActive = false; 4367 } 4368 4369 /** 4370 * @return true iff this controller is currently used to move the selection start. 4371 */ 4372 public boolean isSelectionStartDragged() { 4373 return mStartHandle != null && mStartHandle.isDragging(); 4374 } 4375 4376 /** 4377 * @return true if the user is selecting text using the drag accelerator. 4378 */ 4379 public boolean isDragAcceleratorActive() { 4380 return mDragAcceleratorActive; 4381 } 4382 4383 public void onTouchModeChanged(boolean isInTouchMode) { 4384 if (!isInTouchMode) { 4385 hide(); 4386 } 4387 } 4388 4389 @Override 4390 public void onDetached() { 4391 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4392 observer.removeOnTouchModeChangeListener(this); 4393 4394 if (mStartHandle != null) mStartHandle.onDetached(); 4395 if (mEndHandle != null) mEndHandle.onDetached(); 4396 } 4397 } 4398 4399 private class CorrectionHighlighter { 4400 private final Path mPath = new Path(); 4401 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4402 private int mStart, mEnd; 4403 private long mFadingStartTime; 4404 private RectF mTempRectF; 4405 private final static int FADE_OUT_DURATION = 400; 4406 4407 public CorrectionHighlighter() { 4408 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4409 applicationScale); 4410 mPaint.setStyle(Paint.Style.FILL); 4411 } 4412 4413 public void highlight(CorrectionInfo info) { 4414 mStart = info.getOffset(); 4415 mEnd = mStart + info.getNewText().length(); 4416 mFadingStartTime = SystemClock.uptimeMillis(); 4417 4418 if (mStart < 0 || mEnd < 0) { 4419 stopAnimation(); 4420 } 4421 } 4422 4423 public void draw(Canvas canvas, int cursorOffsetVertical) { 4424 if (updatePath() && updatePaint()) { 4425 if (cursorOffsetVertical != 0) { 4426 canvas.translate(0, cursorOffsetVertical); 4427 } 4428 4429 canvas.drawPath(mPath, mPaint); 4430 4431 if (cursorOffsetVertical != 0) { 4432 canvas.translate(0, -cursorOffsetVertical); 4433 } 4434 invalidate(true); // TODO invalidate cursor region only 4435 } else { 4436 stopAnimation(); 4437 invalidate(false); // TODO invalidate cursor region only 4438 } 4439 } 4440 4441 private boolean updatePaint() { 4442 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4443 if (duration > FADE_OUT_DURATION) return false; 4444 4445 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4446 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4447 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4448 ((int) (highlightColorAlpha * coef) << 24); 4449 mPaint.setColor(color); 4450 return true; 4451 } 4452 4453 private boolean updatePath() { 4454 final Layout layout = mTextView.getLayout(); 4455 if (layout == null) return false; 4456 4457 // Update in case text is edited while the animation is run 4458 final int length = mTextView.getText().length(); 4459 int start = Math.min(length, mStart); 4460 int end = Math.min(length, mEnd); 4461 4462 mPath.reset(); 4463 layout.getSelectionPath(start, end, mPath); 4464 return true; 4465 } 4466 4467 private void invalidate(boolean delayed) { 4468 if (mTextView.getLayout() == null) return; 4469 4470 if (mTempRectF == null) mTempRectF = new RectF(); 4471 mPath.computeBounds(mTempRectF, false); 4472 4473 int left = mTextView.getCompoundPaddingLeft(); 4474 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4475 4476 if (delayed) { 4477 mTextView.postInvalidateOnAnimation( 4478 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4479 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4480 } else { 4481 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4482 (int) mTempRectF.right, (int) mTempRectF.bottom); 4483 } 4484 } 4485 4486 private void stopAnimation() { 4487 Editor.this.mCorrectionHighlighter = null; 4488 } 4489 } 4490 4491 private static class ErrorPopup extends PopupWindow { 4492 private boolean mAbove = false; 4493 private final TextView mView; 4494 private int mPopupInlineErrorBackgroundId = 0; 4495 private int mPopupInlineErrorAboveBackgroundId = 0; 4496 4497 ErrorPopup(TextView v, int width, int height) { 4498 super(v, width, height); 4499 mView = v; 4500 // Make sure the TextView has a background set as it will be used the first time it is 4501 // shown and positioned. Initialized with below background, which should have 4502 // dimensions identical to the above version for this to work (and is more likely). 4503 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4504 com.android.internal.R.styleable.Theme_errorMessageBackground); 4505 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4506 } 4507 4508 void fixDirection(boolean above) { 4509 mAbove = above; 4510 4511 if (above) { 4512 mPopupInlineErrorAboveBackgroundId = 4513 getResourceId(mPopupInlineErrorAboveBackgroundId, 4514 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4515 } else { 4516 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4517 com.android.internal.R.styleable.Theme_errorMessageBackground); 4518 } 4519 4520 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4521 mPopupInlineErrorBackgroundId); 4522 } 4523 4524 private int getResourceId(int currentId, int index) { 4525 if (currentId == 0) { 4526 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4527 R.styleable.Theme); 4528 currentId = styledAttributes.getResourceId(index, 0); 4529 styledAttributes.recycle(); 4530 } 4531 return currentId; 4532 } 4533 4534 @Override 4535 public void update(int x, int y, int w, int h, boolean force) { 4536 super.update(x, y, w, h, force); 4537 4538 boolean above = isAboveAnchor(); 4539 if (above != mAbove) { 4540 fixDirection(above); 4541 } 4542 } 4543 } 4544 4545 static class InputContentType { 4546 int imeOptions = EditorInfo.IME_NULL; 4547 String privateImeOptions; 4548 CharSequence imeActionLabel; 4549 int imeActionId; 4550 Bundle extras; 4551 OnEditorActionListener onEditorActionListener; 4552 boolean enterDown; 4553 } 4554 4555 static class InputMethodState { 4556 Rect mCursorRectInWindow = new Rect(); 4557 float[] mTmpOffset = new float[2]; 4558 ExtractedTextRequest mExtractedTextRequest; 4559 final ExtractedText mExtractedText = new ExtractedText(); 4560 int mBatchEditNesting; 4561 boolean mCursorChanged; 4562 boolean mSelectionModeChanged; 4563 boolean mContentChanged; 4564 int mChangedStart, mChangedEnd, mChangedDelta; 4565 } 4566 4567 /** 4568 * @return True iff (start, end) is a valid range within the text. 4569 */ 4570 private static boolean isValidRange(CharSequence text, int start, int end) { 4571 return 0 <= start && start <= end && end <= text.length(); 4572 } 4573 4574 /** 4575 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4576 * text being typed (and hence always returns null from the filter() method). 4577 */ 4578 public static class UndoInputFilter implements InputFilter { 4579 private final Editor mEditor; 4580 4581 // Whether the current filter pass is directly caused by an end-user text edit. 4582 private boolean mIsUserEdit; 4583 4584 // Whether the text field is handling an IME composition. Must be parceled in case the user 4585 // rotates the screen during composition. 4586 private boolean mHasComposition; 4587 4588 public UndoInputFilter(Editor editor) { 4589 mEditor = editor; 4590 } 4591 4592 public void saveInstanceState(Parcel parcel) { 4593 parcel.writeInt(mIsUserEdit ? 1 : 0); 4594 parcel.writeInt(mHasComposition ? 1 : 0); 4595 } 4596 4597 public void restoreInstanceState(Parcel parcel) { 4598 mIsUserEdit = parcel.readInt() != 0; 4599 mHasComposition = parcel.readInt() != 0; 4600 } 4601 4602 /** 4603 * Signals that a user-triggered edit is starting. 4604 */ 4605 public void beginBatchEdit() { 4606 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4607 mIsUserEdit = true; 4608 } 4609 4610 public void endBatchEdit() { 4611 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4612 mIsUserEdit = false; 4613 } 4614 4615 @Override 4616 public CharSequence filter(CharSequence source, int start, int end, 4617 Spanned dest, int dstart, int dend) { 4618 if (DEBUG_UNDO) { 4619 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4620 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4621 } 4622 4623 // Check to see if this edit should be tracked for undo. 4624 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4625 return null; 4626 } 4627 4628 // Check for and handle IME composition edits. 4629 if (handleCompositionEdit(source, start, end, dstart)) { 4630 return null; 4631 } 4632 4633 // Handle keyboard edits. 4634 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4635 return null; 4636 } 4637 4638 /** 4639 * Returns true iff the edit was handled, either because it should be ignored or because 4640 * this function created an undo operation for it. 4641 */ 4642 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4643 // Ignore edits while the user is composing. 4644 if (isComposition(source)) { 4645 mHasComposition = true; 4646 return true; 4647 } 4648 final boolean hadComposition = mHasComposition; 4649 mHasComposition = false; 4650 4651 // Check for the transition out of the composing state. 4652 if (hadComposition) { 4653 // If there was no text the user canceled composition. Ignore the edit. 4654 if (start == end) { 4655 return true; 4656 } 4657 4658 // Otherwise the user inserted the composition. 4659 String newText = TextUtils.substring(source, start, end); 4660 EditOperation edit = new EditOperation(mEditor, false, "", dstart, newText); 4661 recordEdit(edit); 4662 return true; 4663 } 4664 4665 // This was neither a composition event nor a transition out of composing. 4666 return false; 4667 } 4668 4669 private void handleKeyboardEdit(CharSequence source, int start, int end, 4670 Spanned dest, int dstart, int dend) { 4671 // An application may install a TextWatcher to provide additional modifications after 4672 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4673 // string). This results in multiple filter() calls for what the user considers to be 4674 // a single operation. Always undo the whole set of changes in one step. 4675 final boolean forceMerge = isInTextWatcher(); 4676 4677 // Build a new operation with all the information from this edit. 4678 String newText = TextUtils.substring(source, start, end); 4679 String oldText = TextUtils.substring(dest, dstart, dend); 4680 EditOperation edit = new EditOperation(mEditor, forceMerge, oldText, dstart, newText); 4681 recordEdit(edit); 4682 } 4683 4684 private void recordEdit(EditOperation edit) { 4685 // Fetch the last edit operation and attempt to merge in the new edit. 4686 final UndoManager um = mEditor.mUndoManager; 4687 um.beginUpdate("Edit text"); 4688 EditOperation lastEdit = um.getLastOperation( 4689 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4690 if (lastEdit == null) { 4691 // Add this as the first edit. 4692 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4693 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4694 } else if (!mIsUserEdit) { 4695 // An application directly modified the Editable outside of a text edit. Treat this 4696 // as a new change and don't attempt to merge. 4697 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4698 um.commitState(mEditor.mUndoOwner); 4699 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4700 } else if (lastEdit.mergeWith(edit)) { 4701 // Merge succeeded, nothing else to do. 4702 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4703 } else { 4704 // Could not merge with the last edit, so commit the last edit and add this edit. 4705 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4706 um.commitState(mEditor.mUndoOwner); 4707 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4708 } 4709 um.endUpdate(); 4710 } 4711 4712 private boolean canUndoEdit(CharSequence source, int start, int end, 4713 Spanned dest, int dstart, int dend) { 4714 if (!mEditor.mAllowUndo) { 4715 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4716 return false; 4717 } 4718 4719 if (mEditor.mUndoManager.isInUndo()) { 4720 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4721 return false; 4722 } 4723 4724 // Text filters run before input operations are applied. However, some input operations 4725 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4726 // attempt to undo invalid operations. 4727 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4728 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4729 return false; 4730 } 4731 4732 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4733 // on an input field. Skip no-op changes. 4734 if (start == end && dstart == dend) { 4735 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4736 return false; 4737 } 4738 4739 return true; 4740 } 4741 4742 private boolean isComposition(CharSequence source) { 4743 if (!(source instanceof Spannable)) { 4744 return false; 4745 } 4746 // This is a composition edit if the source has a non-zero-length composing span. 4747 Spannable text = (Spannable) source; 4748 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4749 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4750 return composeBegin < composeEnd; 4751 } 4752 4753 private boolean isInTextWatcher() { 4754 CharSequence text = mEditor.mTextView.getText(); 4755 return (text instanceof SpannableStringBuilder) 4756 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4757 } 4758 } 4759 4760 /** 4761 * An operation to undo a single "edit" to a text view. 4762 */ 4763 public static class EditOperation extends UndoOperation<Editor> { 4764 private static final int TYPE_INSERT = 0; 4765 private static final int TYPE_DELETE = 1; 4766 private static final int TYPE_REPLACE = 2; 4767 4768 private int mType; 4769 private boolean mForceMerge; 4770 private String mOldText; 4771 private int mOldTextStart; 4772 private String mNewText; 4773 private int mNewTextStart; 4774 4775 private int mOldCursorPos; 4776 private int mNewCursorPos; 4777 4778 /** 4779 * Constructs an edit operation from a text input operation on editor that replaces the 4780 * oldText starting at dstart with newText. If forceMerge is true then always forcibly 4781 * merge this operation with any previous one. 4782 */ 4783 public EditOperation(Editor editor, boolean forceMerge, String oldText, int dstart, 4784 String newText) { 4785 super(editor.mUndoOwner); 4786 mForceMerge = forceMerge; 4787 mOldText = oldText; 4788 mNewText = newText; 4789 4790 // Determine the type of the edit and store where it occurred. Avoid storing 4791 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4792 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4793 // outside the bounds of the final text). 4794 if (mNewText.length() > 0 && mOldText.length() == 0) { 4795 mType = TYPE_INSERT; 4796 mNewTextStart = dstart; 4797 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4798 mType = TYPE_DELETE; 4799 mOldTextStart = dstart; 4800 } else { 4801 mType = TYPE_REPLACE; 4802 mOldTextStart = mNewTextStart = dstart; 4803 } 4804 4805 // Store cursor data. 4806 mOldCursorPos = editor.mTextView.getSelectionStart(); 4807 mNewCursorPos = dstart + mNewText.length(); 4808 } 4809 4810 public EditOperation(Parcel src, ClassLoader loader) { 4811 super(src, loader); 4812 mType = src.readInt(); 4813 mForceMerge = src.readInt() != 0; 4814 mOldText = src.readString(); 4815 mOldTextStart = src.readInt(); 4816 mNewText = src.readString(); 4817 mNewTextStart = src.readInt(); 4818 mOldCursorPos = src.readInt(); 4819 mNewCursorPos = src.readInt(); 4820 } 4821 4822 @Override 4823 public void writeToParcel(Parcel dest, int flags) { 4824 dest.writeInt(mType); 4825 dest.writeInt(mForceMerge ? 1 : 0); 4826 dest.writeString(mOldText); 4827 dest.writeInt(mOldTextStart); 4828 dest.writeString(mNewText); 4829 dest.writeInt(mNewTextStart); 4830 dest.writeInt(mOldCursorPos); 4831 dest.writeInt(mNewCursorPos); 4832 } 4833 4834 private int getNewTextEnd() { 4835 return mNewTextStart + mNewText.length(); 4836 } 4837 4838 private int getOldTextEnd() { 4839 return mOldTextStart + mOldText.length(); 4840 } 4841 4842 @Override 4843 public void commit() { 4844 } 4845 4846 @Override 4847 public void undo() { 4848 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4849 // Remove the new text and insert the old. 4850 Editor editor = getOwnerData(); 4851 Editable text = (Editable) editor.mTextView.getText(); 4852 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4853 mOldCursorPos); 4854 } 4855 4856 @Override 4857 public void redo() { 4858 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4859 // Remove the old text and insert the new. 4860 Editor editor = getOwnerData(); 4861 Editable text = (Editable) editor.mTextView.getText(); 4862 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4863 mNewCursorPos); 4864 } 4865 4866 /** 4867 * Attempts to merge this existing operation with a new edit. 4868 * @param edit The new edit operation. 4869 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4870 * object unchanged. 4871 */ 4872 private boolean mergeWith(EditOperation edit) { 4873 if (DEBUG_UNDO) { 4874 Log.d(TAG, "mergeWith old " + this); 4875 Log.d(TAG, "mergeWith new " + edit); 4876 } 4877 if (edit.mForceMerge) { 4878 forceMergeWith(edit); 4879 return true; 4880 } 4881 switch (mType) { 4882 case TYPE_INSERT: 4883 return mergeInsertWith(edit); 4884 case TYPE_DELETE: 4885 return mergeDeleteWith(edit); 4886 case TYPE_REPLACE: 4887 return mergeReplaceWith(edit); 4888 default: 4889 return false; 4890 } 4891 } 4892 4893 private boolean mergeInsertWith(EditOperation edit) { 4894 // Only merge continuous insertions. 4895 if (edit.mType != TYPE_INSERT) { 4896 return false; 4897 } 4898 // Only merge insertions that are contiguous. 4899 if (getNewTextEnd() != edit.mNewTextStart) { 4900 return false; 4901 } 4902 mNewText += edit.mNewText; 4903 mNewCursorPos = edit.mNewCursorPos; 4904 return true; 4905 } 4906 4907 // TODO: Support forward delete. 4908 private boolean mergeDeleteWith(EditOperation edit) { 4909 // Only merge continuous deletes. 4910 if (edit.mType != TYPE_DELETE) { 4911 return false; 4912 } 4913 // Only merge deletions that are contiguous. 4914 if (mOldTextStart != edit.getOldTextEnd()) { 4915 return false; 4916 } 4917 mOldTextStart = edit.mOldTextStart; 4918 mOldText = edit.mOldText + mOldText; 4919 mNewCursorPos = edit.mNewCursorPos; 4920 return true; 4921 } 4922 4923 private boolean mergeReplaceWith(EditOperation edit) { 4924 // Replacements can merge only with adjacent inserts. 4925 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 4926 return false; 4927 } 4928 mOldText += edit.mOldText; 4929 mNewText += edit.mNewText; 4930 mNewCursorPos = edit.mNewCursorPos; 4931 return true; 4932 } 4933 4934 /** 4935 * Forcibly creates a single merged edit operation by simulating the entire text 4936 * contents being replaced. 4937 */ 4938 private void forceMergeWith(EditOperation edit) { 4939 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 4940 Editor editor = getOwnerData(); 4941 4942 // Copy the text of the current field. 4943 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 4944 // but would require two parallel implementations of modifyText() because Editable and 4945 // StringBuilder do not share an interface for replace/delete/insert. 4946 Editable editable = (Editable) editor.mTextView.getText(); 4947 Editable originalText = new SpannableStringBuilder(editable.toString()); 4948 4949 // Roll back the last operation. 4950 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4951 mOldCursorPos); 4952 4953 // Clone the text again and apply the new operation. 4954 Editable finalText = new SpannableStringBuilder(editable.toString()); 4955 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 4956 edit.mNewTextStart, edit.mNewCursorPos); 4957 4958 // Convert this operation into a non-mergeable replacement of the entire string. 4959 mType = TYPE_REPLACE; 4960 mNewText = finalText.toString(); 4961 mNewTextStart = 0; 4962 mOldText = originalText.toString(); 4963 mOldTextStart = 0; 4964 mNewCursorPos = edit.mNewCursorPos; 4965 // mOldCursorPos is unchanged. 4966 } 4967 4968 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 4969 CharSequence newText, int newTextInsertAt, int newCursorPos) { 4970 // Apply the edit if it is still valid. 4971 if (isValidRange(text, deleteFrom, deleteTo) && 4972 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 4973 if (deleteFrom != deleteTo) { 4974 text.delete(deleteFrom, deleteTo); 4975 } 4976 if (newText.length() != 0) { 4977 text.insert(newTextInsertAt, newText); 4978 } 4979 } 4980 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 4981 // don't explicitly set it and rely on SpannableStringBuilder to position it. 4982 // TODO: Select all the text that was undone. 4983 if (0 <= newCursorPos && newCursorPos <= text.length()) { 4984 Selection.setSelection(text, newCursorPos); 4985 } 4986 } 4987 4988 private String getTypeString() { 4989 switch (mType) { 4990 case TYPE_INSERT: 4991 return "insert"; 4992 case TYPE_DELETE: 4993 return "delete"; 4994 case TYPE_REPLACE: 4995 return "replace"; 4996 default: 4997 return ""; 4998 } 4999 } 5000 5001 @Override 5002 public String toString() { 5003 return "[mType=" + getTypeString() + ", " + 5004 "mOldText=" + mOldText + ", " + 5005 "mOldTextStart=" + mOldTextStart + ", " + 5006 "mNewText=" + mNewText + ", " + 5007 "mNewTextStart=" + mNewTextStart + ", " + 5008 "mOldCursorPos=" + mOldCursorPos + ", " + 5009 "mNewCursorPos=" + mNewCursorPos + "]"; 5010 } 5011 5012 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5013 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5014 @Override 5015 public EditOperation createFromParcel(Parcel in) { 5016 return new EditOperation(in, null); 5017 } 5018 5019 @Override 5020 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5021 return new EditOperation(in, loader); 5022 } 5023 5024 @Override 5025 public EditOperation[] newArray(int size) { 5026 return new EditOperation[size]; 5027 } 5028 }; 5029 } 5030} 5031