Editor.java revision e72e94767c63924f93c9ddf6e5fb78576c18c99c
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.Nullable; 21import android.app.PendingIntent; 22import android.app.PendingIntent.CanceledException; 23import android.content.ClipData; 24import android.content.ClipData.Item; 25import android.content.Context; 26import android.content.Intent; 27import android.content.UndoManager; 28import android.content.UndoOperation; 29import android.content.UndoOwner; 30import android.content.pm.PackageManager; 31import android.content.pm.ResolveInfo; 32import android.content.res.TypedArray; 33import android.graphics.Canvas; 34import android.graphics.Color; 35import android.graphics.Matrix; 36import android.graphics.Paint; 37import android.graphics.Path; 38import android.graphics.Rect; 39import android.graphics.RectF; 40import android.graphics.drawable.Drawable; 41import android.inputmethodservice.ExtractEditText; 42import android.os.Bundle; 43import android.os.Handler; 44import android.os.Parcel; 45import android.os.Parcelable; 46import android.os.ParcelableParcel; 47import android.os.SystemClock; 48import android.provider.Settings; 49import android.text.DynamicLayout; 50import android.text.Editable; 51import android.text.InputFilter; 52import android.text.InputType; 53import android.text.Layout; 54import android.text.ParcelableSpan; 55import android.text.Selection; 56import android.text.SpanWatcher; 57import android.text.Spannable; 58import android.text.SpannableStringBuilder; 59import android.text.Spanned; 60import android.text.StaticLayout; 61import android.text.TextUtils; 62import android.text.method.KeyListener; 63import android.text.method.MetaKeyKeyListener; 64import android.text.method.MovementMethod; 65import android.text.method.PasswordTransformationMethod; 66import android.text.method.WordIterator; 67import android.text.style.EasyEditSpan; 68import android.text.style.SuggestionRangeSpan; 69import android.text.style.SuggestionSpan; 70import android.text.style.TextAppearanceSpan; 71import android.text.style.URLSpan; 72import android.util.DisplayMetrics; 73import android.util.Log; 74import android.view.ActionMode; 75import android.view.ActionMode.Callback; 76import android.view.DisplayListCanvas; 77import android.view.DragEvent; 78import android.view.Gravity; 79import android.view.LayoutInflater; 80import android.view.Menu; 81import android.view.MenuItem; 82import android.view.MotionEvent; 83import android.view.RenderNode; 84import android.view.View; 85import android.view.View.DragShadowBuilder; 86import android.view.View.OnClickListener; 87import android.view.ViewConfiguration; 88import android.view.ViewGroup; 89import android.view.ViewGroup.LayoutParams; 90import android.view.ViewParent; 91import android.view.ViewTreeObserver; 92import android.view.WindowManager; 93import android.view.inputmethod.CorrectionInfo; 94import android.view.inputmethod.CursorAnchorInfo; 95import android.view.inputmethod.EditorInfo; 96import android.view.inputmethod.ExtractedText; 97import android.view.inputmethod.ExtractedTextRequest; 98import android.view.inputmethod.InputConnection; 99import android.view.inputmethod.InputMethodManager; 100import android.widget.AdapterView.OnItemClickListener; 101import android.widget.TextView.Drawables; 102import android.widget.TextView.OnEditorActionListener; 103 104import com.android.internal.util.ArrayUtils; 105import com.android.internal.util.GrowingArrayUtils; 106import com.android.internal.widget.EditableInputConnection; 107 108import java.text.BreakIterator; 109import java.util.Arrays; 110import java.util.Comparator; 111import java.util.HashMap; 112import java.util.List; 113 114/** 115 * Helper class used by TextView to handle editable text views. 116 * 117 * @hide 118 */ 119public class Editor { 120 private static final String TAG = "Editor"; 121 private static final boolean DEBUG_UNDO = false; 122 123 static final int BLINK = 500; 124 private static final float[] TEMP_POSITION = new float[2]; 125 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 126 // Tag used when the Editor maintains its own separate UndoManager. 127 private static final String UNDO_OWNER_TAG = "Editor"; 128 129 // Each Editor manages its own undo stack. 130 private final UndoManager mUndoManager = new UndoManager(); 131 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 132 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 133 boolean mAllowUndo = true; 134 135 // Cursor Controllers. 136 InsertionPointCursorController mInsertionPointCursorController; 137 SelectionModifierCursorController mSelectionModifierCursorController; 138 ActionMode mSelectionActionMode; 139 boolean mInsertionControllerEnabled; 140 boolean mSelectionControllerEnabled; 141 142 // Used to highlight a word when it is corrected by the IME 143 CorrectionHighlighter mCorrectionHighlighter; 144 145 InputContentType mInputContentType; 146 InputMethodState mInputMethodState; 147 148 private static class TextDisplayList { 149 RenderNode displayList; 150 boolean isDirty; 151 public TextDisplayList(String name) { 152 isDirty = true; 153 displayList = RenderNode.create(name, null); 154 } 155 boolean needsRecord() { return isDirty || !displayList.isValid(); } 156 } 157 TextDisplayList[] mTextDisplayLists; 158 159 boolean mFrozenWithFocus; 160 boolean mSelectionMoved; 161 boolean mTouchFocusSelected; 162 163 KeyListener mKeyListener; 164 int mInputType = EditorInfo.TYPE_NULL; 165 166 boolean mDiscardNextActionUp; 167 boolean mIgnoreActionUpEvent; 168 169 long mShowCursor; 170 Blink mBlink; 171 172 boolean mCursorVisible = true; 173 boolean mSelectAllOnFocus; 174 boolean mTextIsSelectable; 175 176 CharSequence mError; 177 boolean mErrorWasChanged; 178 ErrorPopup mErrorPopup; 179 180 /** 181 * This flag is set if the TextView tries to display an error before it 182 * is attached to the window (so its position is still unknown). 183 * It causes the error to be shown later, when onAttachedToWindow() 184 * is called. 185 */ 186 boolean mShowErrorAfterAttach; 187 188 boolean mInBatchEditControllers; 189 boolean mShowSoftInputOnFocus = true; 190 boolean mPreserveDetachedSelection; 191 boolean mTemporaryDetach; 192 193 SuggestionsPopupWindow mSuggestionsPopupWindow; 194 SuggestionRangeSpan mSuggestionRangeSpan; 195 Runnable mShowSuggestionRunnable; 196 197 final Drawable[] mCursorDrawable = new Drawable[2]; 198 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 199 200 private Drawable mSelectHandleLeft; 201 private Drawable mSelectHandleRight; 202 private Drawable mSelectHandleCenter; 203 204 // Global listener that detects changes in the global position of the TextView 205 private PositionListener mPositionListener; 206 207 float mLastDownPositionX, mLastDownPositionY; 208 Callback mCustomSelectionActionModeCallback; 209 210 // Set when this TextView gained focus with some text selected. Will start selection mode. 211 boolean mCreatedWithASelection; 212 213 // The span controller helps monitoring the changes to which the Editor needs to react: 214 // - EasyEditSpans, for which we have some UI to display on attach and on hide 215 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 216 private SpanController mSpanController; 217 218 WordIterator mWordIterator; 219 SpellChecker mSpellChecker; 220 221 // This word iterator is set with text and used to determine word boundaries 222 // when a user is selecting text. 223 private WordIterator mWordIteratorWithText; 224 // Indicate that the text in the word iterator needs to be updated. 225 private boolean mUpdateWordIteratorText; 226 227 private Rect mTempRect; 228 229 private TextView mTextView; 230 231 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 232 233 Editor(TextView textView) { 234 mTextView = textView; 235 // Synchronize the filter list, which places the undo input filter at the end. 236 mTextView.setFilters(mTextView.getFilters()); 237 } 238 239 ParcelableParcel saveInstanceState() { 240 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 241 Parcel parcel = state.getParcel(); 242 mUndoManager.saveInstanceState(parcel); 243 mUndoInputFilter.saveInstanceState(parcel); 244 return state; 245 } 246 247 void restoreInstanceState(ParcelableParcel state) { 248 Parcel parcel = state.getParcel(); 249 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 250 mUndoInputFilter.restoreInstanceState(parcel); 251 // Re-associate this object as the owner of undo state. 252 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 253 } 254 255 /** 256 * Forgets all undo and redo operations for this Editor. 257 */ 258 void forgetUndoRedo() { 259 UndoOwner[] owners = { mUndoOwner }; 260 mUndoManager.forgetUndos(owners, -1 /* all */); 261 mUndoManager.forgetRedos(owners, -1 /* all */); 262 } 263 264 boolean canUndo() { 265 UndoOwner[] owners = { mUndoOwner }; 266 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 267 } 268 269 boolean canRedo() { 270 UndoOwner[] owners = { mUndoOwner }; 271 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 272 } 273 274 void undo() { 275 if (!mAllowUndo) { 276 return; 277 } 278 UndoOwner[] owners = { mUndoOwner }; 279 mUndoManager.undo(owners, 1); // Undo 1 action. 280 } 281 282 void redo() { 283 if (!mAllowUndo) { 284 return; 285 } 286 UndoOwner[] owners = { mUndoOwner }; 287 mUndoManager.redo(owners, 1); // Redo 1 action. 288 } 289 290 void onAttachedToWindow() { 291 if (mShowErrorAfterAttach) { 292 showError(); 293 mShowErrorAfterAttach = false; 294 } 295 mTemporaryDetach = false; 296 297 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 298 // No need to create the controller. 299 // The get method will add the listener on controller creation. 300 if (mInsertionPointCursorController != null) { 301 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 302 } 303 if (mSelectionModifierCursorController != null) { 304 mSelectionModifierCursorController.resetTouchOffsets(); 305 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 306 } 307 updateSpellCheckSpans(0, mTextView.getText().length(), 308 true /* create the spell checker if needed */); 309 310 if (mTextView.hasTransientState() && 311 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 312 // Since transient state is reference counted make sure it stays matched 313 // with our own calls to it for managing selection. 314 // The action mode callback will set this back again when/if the action mode starts. 315 mTextView.setHasTransientState(false); 316 317 // We had an active selection from before, start the selection mode. 318 startSelectionActionModeWithSelection(); 319 } 320 321 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 322 } 323 324 void onDetachedFromWindow() { 325 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 326 327 if (mError != null) { 328 hideError(); 329 } 330 331 if (mBlink != null) { 332 mBlink.removeCallbacks(mBlink); 333 } 334 335 if (mInsertionPointCursorController != null) { 336 mInsertionPointCursorController.onDetached(); 337 } 338 339 if (mSelectionModifierCursorController != null) { 340 mSelectionModifierCursorController.onDetached(); 341 } 342 343 if (mShowSuggestionRunnable != null) { 344 mTextView.removeCallbacks(mShowSuggestionRunnable); 345 } 346 347 destroyDisplayListsData(); 348 349 if (mSpellChecker != null) { 350 mSpellChecker.closeSession(); 351 // Forces the creation of a new SpellChecker next time this window is created. 352 // Will handle the cases where the settings has been changed in the meantime. 353 mSpellChecker = null; 354 } 355 356 mPreserveDetachedSelection = true; 357 hideControllers(); 358 mPreserveDetachedSelection = false; 359 mTemporaryDetach = false; 360 } 361 362 private void destroyDisplayListsData() { 363 if (mTextDisplayLists != null) { 364 for (int i = 0; i < mTextDisplayLists.length; i++) { 365 RenderNode displayList = mTextDisplayLists[i] != null 366 ? mTextDisplayLists[i].displayList : null; 367 if (displayList != null && displayList.isValid()) { 368 displayList.destroyDisplayListData(); 369 } 370 } 371 } 372 } 373 374 private void showError() { 375 if (mTextView.getWindowToken() == null) { 376 mShowErrorAfterAttach = true; 377 return; 378 } 379 380 if (mErrorPopup == null) { 381 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 382 final TextView err = (TextView) inflater.inflate( 383 com.android.internal.R.layout.textview_hint, null); 384 385 final float scale = mTextView.getResources().getDisplayMetrics().density; 386 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 387 mErrorPopup.setFocusable(false); 388 // The user is entering text, so the input method is needed. We 389 // don't want the popup to be displayed on top of it. 390 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 391 } 392 393 TextView tv = (TextView) mErrorPopup.getContentView(); 394 chooseSize(mErrorPopup, mError, tv); 395 tv.setText(mError); 396 397 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 398 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 399 } 400 401 public void setError(CharSequence error, Drawable icon) { 402 mError = TextUtils.stringOrSpannedString(error); 403 mErrorWasChanged = true; 404 405 if (mError == null) { 406 setErrorIcon(null); 407 if (mErrorPopup != null) { 408 if (mErrorPopup.isShowing()) { 409 mErrorPopup.dismiss(); 410 } 411 412 mErrorPopup = null; 413 } 414 mShowErrorAfterAttach = false; 415 } else { 416 setErrorIcon(icon); 417 if (mTextView.isFocused()) { 418 showError(); 419 } 420 } 421 } 422 423 private void setErrorIcon(Drawable icon) { 424 Drawables dr = mTextView.mDrawables; 425 if (dr == null) { 426 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 427 } 428 dr.setErrorDrawable(icon, mTextView); 429 430 mTextView.resetResolvedDrawables(); 431 mTextView.invalidate(); 432 mTextView.requestLayout(); 433 } 434 435 private void hideError() { 436 if (mErrorPopup != null) { 437 if (mErrorPopup.isShowing()) { 438 mErrorPopup.dismiss(); 439 } 440 } 441 442 mShowErrorAfterAttach = false; 443 } 444 445 /** 446 * Returns the X offset to make the pointy top of the error point 447 * at the middle of the error icon. 448 */ 449 private int getErrorX() { 450 /* 451 * The "25" is the distance between the point and the right edge 452 * of the background 453 */ 454 final float scale = mTextView.getResources().getDisplayMetrics().density; 455 456 final Drawables dr = mTextView.mDrawables; 457 458 final int layoutDirection = mTextView.getLayoutDirection(); 459 int errorX; 460 int offset; 461 switch (layoutDirection) { 462 default: 463 case View.LAYOUT_DIRECTION_LTR: 464 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 465 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 466 mTextView.getPaddingRight() + offset; 467 break; 468 case View.LAYOUT_DIRECTION_RTL: 469 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 470 errorX = mTextView.getPaddingLeft() + offset; 471 break; 472 } 473 return errorX; 474 } 475 476 /** 477 * Returns the Y offset to make the pointy top of the error point 478 * at the bottom of the error icon. 479 */ 480 private int getErrorY() { 481 /* 482 * Compound, not extended, because the icon is not clipped 483 * if the text height is smaller. 484 */ 485 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 486 int vspace = mTextView.getBottom() - mTextView.getTop() - 487 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 488 489 final Drawables dr = mTextView.mDrawables; 490 491 final int layoutDirection = mTextView.getLayoutDirection(); 492 int height; 493 switch (layoutDirection) { 494 default: 495 case View.LAYOUT_DIRECTION_LTR: 496 height = (dr != null ? dr.mDrawableHeightRight : 0); 497 break; 498 case View.LAYOUT_DIRECTION_RTL: 499 height = (dr != null ? dr.mDrawableHeightLeft : 0); 500 break; 501 } 502 503 int icontop = compoundPaddingTop + (vspace - height) / 2; 504 505 /* 506 * The "2" is the distance between the point and the top edge 507 * of the background. 508 */ 509 final float scale = mTextView.getResources().getDisplayMetrics().density; 510 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 511 } 512 513 void createInputContentTypeIfNeeded() { 514 if (mInputContentType == null) { 515 mInputContentType = new InputContentType(); 516 } 517 } 518 519 void createInputMethodStateIfNeeded() { 520 if (mInputMethodState == null) { 521 mInputMethodState = new InputMethodState(); 522 } 523 } 524 525 boolean isCursorVisible() { 526 // The default value is true, even when there is no associated Editor 527 return mCursorVisible && mTextView.isTextEditable(); 528 } 529 530 void prepareCursorControllers() { 531 boolean windowSupportsHandles = false; 532 533 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 534 if (params instanceof WindowManager.LayoutParams) { 535 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 536 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 537 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 538 } 539 540 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 541 mInsertionControllerEnabled = enabled && isCursorVisible(); 542 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 543 544 if (!mInsertionControllerEnabled) { 545 hideInsertionPointCursorController(); 546 if (mInsertionPointCursorController != null) { 547 mInsertionPointCursorController.onDetached(); 548 mInsertionPointCursorController = null; 549 } 550 } 551 552 if (!mSelectionControllerEnabled) { 553 stopSelectionActionMode(); 554 if (mSelectionModifierCursorController != null) { 555 mSelectionModifierCursorController.onDetached(); 556 mSelectionModifierCursorController = null; 557 } 558 } 559 } 560 561 void hideInsertionPointCursorController() { 562 if (mInsertionPointCursorController != null) { 563 mInsertionPointCursorController.hide(); 564 } 565 } 566 567 /** 568 * Hides the insertion controller and stops text selection mode, hiding the selection controller 569 */ 570 void hideControllers() { 571 hideCursorControllers(); 572 hideSpanControllers(); 573 } 574 575 private void hideSpanControllers() { 576 if (mSpanController != null) { 577 mSpanController.hide(); 578 } 579 } 580 581 private void hideCursorControllers() { 582 if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) { 583 // Should be done before hide insertion point controller since it triggers a show of it 584 mSuggestionsPopupWindow.hide(); 585 } 586 hideInsertionPointCursorController(); 587 stopSelectionActionMode(); 588 } 589 590 /** 591 * Create new SpellCheckSpans on the modified region. 592 */ 593 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 594 // Remove spans whose adjacent characters are text not punctuation 595 mTextView.removeAdjacentSuggestionSpans(start); 596 mTextView.removeAdjacentSuggestionSpans(end); 597 598 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 599 !(mTextView instanceof ExtractEditText)) { 600 if (mSpellChecker == null && createSpellChecker) { 601 mSpellChecker = new SpellChecker(mTextView); 602 } 603 if (mSpellChecker != null) { 604 mSpellChecker.spellCheck(start, end); 605 } 606 } 607 } 608 609 void onScreenStateChanged(int screenState) { 610 switch (screenState) { 611 case View.SCREEN_STATE_ON: 612 resumeBlink(); 613 break; 614 case View.SCREEN_STATE_OFF: 615 suspendBlink(); 616 break; 617 } 618 } 619 620 private void suspendBlink() { 621 if (mBlink != null) { 622 mBlink.cancel(); 623 } 624 } 625 626 private void resumeBlink() { 627 if (mBlink != null) { 628 mBlink.uncancel(); 629 makeBlink(); 630 } 631 } 632 633 void adjustInputType(boolean password, boolean passwordInputType, 634 boolean webPasswordInputType, boolean numberPasswordInputType) { 635 // mInputType has been set from inputType, possibly modified by mInputMethod. 636 // Specialize mInputType to [web]password if we have a text class and the original input 637 // type was a password. 638 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 639 if (password || passwordInputType) { 640 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 641 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 642 } 643 if (webPasswordInputType) { 644 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 645 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 646 } 647 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 648 if (numberPasswordInputType) { 649 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 650 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 651 } 652 } 653 } 654 655 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 656 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 657 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 658 659 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 660 com.android.internal.R.dimen.textview_error_popup_default_width); 661 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 662 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 663 float max = 0; 664 for (int i = 0; i < l.getLineCount(); i++) { 665 max = Math.max(max, l.getLineWidth(i)); 666 } 667 668 /* 669 * Now set the popup size to be big enough for the text plus the border capped 670 * to DEFAULT_MAX_POPUP_WIDTH 671 */ 672 pop.setWidth(wid + (int) Math.ceil(max)); 673 pop.setHeight(ht + l.getHeight()); 674 } 675 676 void setFrame() { 677 if (mErrorPopup != null) { 678 TextView tv = (TextView) mErrorPopup.getContentView(); 679 chooseSize(mErrorPopup, mError, tv); 680 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 681 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 682 } 683 } 684 685 /** 686 * Unlike {@link TextView#textCanBeSelected()}, this method is based on the <i>current</i> state 687 * of the TextView. textCanBeSelected() has to be true (this is one of the conditions to have 688 * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient. 689 */ 690 private boolean canSelectText() { 691 return hasSelectionController() && mTextView.getText().length() != 0; 692 } 693 694 /** 695 * It would be better to rely on the input type for everything. A password inputType should have 696 * a password transformation. We should hence use isPasswordInputType instead of this method. 697 * 698 * We should: 699 * - Call setInputType in setKeyListener instead of changing the input type directly (which 700 * would install the correct transformation). 701 * - Refuse the installation of a non-password transformation in setTransformation if the input 702 * type is password. 703 * 704 * However, this is like this for legacy reasons and we cannot break existing apps. This method 705 * is useful since it matches what the user can see (obfuscated text or not). 706 * 707 * @return true if the current transformation method is of the password type. 708 */ 709 private boolean hasPasswordTransformationMethod() { 710 return mTextView.getTransformationMethod() instanceof PasswordTransformationMethod; 711 } 712 713 private int getWordStart(int offset) { 714 // FIXME - For this and similar methods we're not doing anything to check if there's 715 // a LocaleSpan in the text, this may be something we should try handling or checking for. 716 int retOffset = getWordIteratorWithText().getBeginning(offset); 717 if (retOffset == BreakIterator.DONE) retOffset = offset; 718 return retOffset; 719 } 720 721 private int getWordEnd(int offset, boolean includePunctuation) { 722 int retOffset = getWordIteratorWithText().getEnd(offset); 723 if (retOffset == BreakIterator.DONE) { 724 retOffset = offset; 725 } else if (includePunctuation) { 726 retOffset = handlePunctuation(retOffset); 727 } 728 return retOffset; 729 } 730 731 private boolean isEndBoundary(int offset) { 732 int thisEnd = getWordEnd(offset, false); 733 return offset == thisEnd; 734 } 735 736 private boolean isStartBoundary(int offset) { 737 int thisStart = getWordStart(offset); 738 return thisStart == offset; 739 } 740 741 private int handlePunctuation(int offset) { 742 // FIXME - Check with UX how repeated ending punctuation should be handled. 743 // FIXME - Check with UX if / how we would handle non sentence ending characters. 744 // FIXME - Consider punctuation in different languages. 745 CharSequence text = mTextView.getText(); 746 if (offset < text.length()) { 747 int c = Character.codePointAt(text, offset); 748 if (c == 0x002e /* period */|| c == 0x003f /* question mark */ 749 || c == 0x0021 /* exclamation mark */) { 750 offset = Character.offsetByCodePoints(text, offset, 1); 751 } 752 } 753 return offset; 754 } 755 756 /** 757 * Adjusts selection to the word under last touch offset. Return true if the operation was 758 * successfully performed. 759 */ 760 private boolean selectCurrentWord() { 761 if (!canSelectText()) { 762 return false; 763 } 764 765 if (hasPasswordTransformationMethod()) { 766 // Always select all on a password field. 767 // Cut/copy menu entries are not available for passwords, but being able to select all 768 // is however useful to delete or paste to replace the entire content. 769 return mTextView.selectAllText(); 770 } 771 772 int inputType = mTextView.getInputType(); 773 int klass = inputType & InputType.TYPE_MASK_CLASS; 774 int variation = inputType & InputType.TYPE_MASK_VARIATION; 775 776 // Specific text field types: select the entire text for these 777 if (klass == InputType.TYPE_CLASS_NUMBER || 778 klass == InputType.TYPE_CLASS_PHONE || 779 klass == InputType.TYPE_CLASS_DATETIME || 780 variation == InputType.TYPE_TEXT_VARIATION_URI || 781 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 782 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 783 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 784 return mTextView.selectAllText(); 785 } 786 787 long lastTouchOffsets = getLastTouchOffsets(); 788 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 789 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 790 791 // Safety check in case standard touch event handling has been bypassed 792 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 793 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 794 795 int selectionStart, selectionEnd; 796 797 // If a URLSpan (web address, email, phone...) is found at that position, select it. 798 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 799 getSpans(minOffset, maxOffset, URLSpan.class); 800 if (urlSpans.length >= 1) { 801 URLSpan urlSpan = urlSpans[0]; 802 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 803 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 804 } else { 805 // FIXME - We should check if there's a LocaleSpan in the text, this may be 806 // something we should try handling or checking for. 807 final WordIterator wordIterator = getWordIterator(); 808 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 809 810 selectionStart = wordIterator.getBeginning(minOffset); 811 selectionEnd = wordIterator.getEnd(maxOffset); 812 813 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 814 selectionStart == selectionEnd) { 815 // Possible when the word iterator does not properly handle the text's language 816 long range = getCharRange(minOffset); 817 selectionStart = TextUtils.unpackRangeStartFromLong(range); 818 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 819 } 820 } 821 822 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 823 return selectionEnd > selectionStart; 824 } 825 826 void onLocaleChanged() { 827 // Will be re-created on demand in getWordIterator with the proper new locale 828 mWordIterator = null; 829 mWordIteratorWithText = null; 830 } 831 832 /** 833 * @hide 834 */ 835 public WordIterator getWordIterator() { 836 if (mWordIterator == null) { 837 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 838 } 839 return mWordIterator; 840 } 841 842 private WordIterator getWordIteratorWithText() { 843 if (mWordIteratorWithText == null) { 844 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 845 mUpdateWordIteratorText = true; 846 } 847 if (mUpdateWordIteratorText) { 848 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 849 // to the user's selection is needed. A possible solution would be to 850 // copy some number N of characters near the selection and then when the 851 // user approaches N then we'd do another copy of the next N characters. 852 CharSequence text = mTextView.getText(); 853 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 854 mUpdateWordIteratorText = false; 855 } 856 return mWordIteratorWithText; 857 } 858 859 private long getCharRange(int offset) { 860 final int textLength = mTextView.getText().length(); 861 if (offset + 1 < textLength) { 862 final char currentChar = mTextView.getText().charAt(offset); 863 final char nextChar = mTextView.getText().charAt(offset + 1); 864 if (Character.isSurrogatePair(currentChar, nextChar)) { 865 return TextUtils.packRangeInLong(offset, offset + 2); 866 } 867 } 868 if (offset < textLength) { 869 return TextUtils.packRangeInLong(offset, offset + 1); 870 } 871 if (offset - 2 >= 0) { 872 final char previousChar = mTextView.getText().charAt(offset - 1); 873 final char previousPreviousChar = mTextView.getText().charAt(offset - 2); 874 if (Character.isSurrogatePair(previousPreviousChar, previousChar)) { 875 return TextUtils.packRangeInLong(offset - 2, offset); 876 } 877 } 878 if (offset - 1 >= 0) { 879 return TextUtils.packRangeInLong(offset - 1, offset); 880 } 881 return TextUtils.packRangeInLong(offset, offset); 882 } 883 884 private boolean touchPositionIsInSelection() { 885 int selectionStart = mTextView.getSelectionStart(); 886 int selectionEnd = mTextView.getSelectionEnd(); 887 888 if (selectionStart == selectionEnd) { 889 return false; 890 } 891 892 if (selectionStart > selectionEnd) { 893 int tmp = selectionStart; 894 selectionStart = selectionEnd; 895 selectionEnd = tmp; 896 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 897 } 898 899 SelectionModifierCursorController selectionController = getSelectionController(); 900 int minOffset = selectionController.getMinTouchOffset(); 901 int maxOffset = selectionController.getMaxTouchOffset(); 902 903 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 904 } 905 906 private PositionListener getPositionListener() { 907 if (mPositionListener == null) { 908 mPositionListener = new PositionListener(); 909 } 910 return mPositionListener; 911 } 912 913 private interface TextViewPositionListener { 914 public void updatePosition(int parentPositionX, int parentPositionY, 915 boolean parentPositionChanged, boolean parentScrolled); 916 } 917 918 private boolean isPositionVisible(final float positionX, final float positionY) { 919 synchronized (TEMP_POSITION) { 920 final float[] position = TEMP_POSITION; 921 position[0] = positionX; 922 position[1] = positionY; 923 View view = mTextView; 924 925 while (view != null) { 926 if (view != mTextView) { 927 // Local scroll is already taken into account in positionX/Y 928 position[0] -= view.getScrollX(); 929 position[1] -= view.getScrollY(); 930 } 931 932 if (position[0] < 0 || position[1] < 0 || 933 position[0] > view.getWidth() || position[1] > view.getHeight()) { 934 return false; 935 } 936 937 if (!view.getMatrix().isIdentity()) { 938 view.getMatrix().mapPoints(position); 939 } 940 941 position[0] += view.getLeft(); 942 position[1] += view.getTop(); 943 944 final ViewParent parent = view.getParent(); 945 if (parent instanceof View) { 946 view = (View) parent; 947 } else { 948 // We've reached the ViewRoot, stop iterating 949 view = null; 950 } 951 } 952 } 953 954 // We've been able to walk up the view hierarchy and the position was never clipped 955 return true; 956 } 957 958 private boolean isOffsetVisible(int offset) { 959 Layout layout = mTextView.getLayout(); 960 if (layout == null) return false; 961 962 final int line = layout.getLineForOffset(offset); 963 final int lineBottom = layout.getLineBottom(line); 964 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 965 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 966 lineBottom + mTextView.viewportToContentVerticalOffset()); 967 } 968 969 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 970 * in the view. Returns false when the position is in the empty space of left/right of text. 971 */ 972 private boolean isPositionOnText(float x, float y) { 973 Layout layout = mTextView.getLayout(); 974 if (layout == null) return false; 975 976 final int line = mTextView.getLineAtCoordinate(y); 977 x = mTextView.convertToLocalHorizontalCoordinate(x); 978 979 if (x < layout.getLineLeft(line)) return false; 980 if (x > layout.getLineRight(line)) return false; 981 return true; 982 } 983 984 public boolean performLongClick(boolean handled) { 985 // Long press in empty space moves cursor and starts the selection action mode. 986 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 987 mInsertionControllerEnabled) { 988 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 989 mLastDownPositionY); 990 stopSelectionActionMode(); 991 Selection.setSelection((Spannable) mTextView.getText(), offset); 992 getInsertionController().show(); 993 startSelectionActionModeWithoutSelection(); 994 handled = true; 995 } 996 997 if (!handled && mSelectionActionMode != null) { 998 if (touchPositionIsInSelection()) { 999 // Start a drag 1000 final int start = mTextView.getSelectionStart(); 1001 final int end = mTextView.getSelectionEnd(); 1002 CharSequence selectedText = mTextView.getTransformedText(start, end); 1003 ClipData data = ClipData.newPlainText(null, selectedText); 1004 DragLocalState localState = new DragLocalState(mTextView, start, end); 1005 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 1006 View.DRAG_FLAG_GLOBAL); 1007 stopSelectionActionMode(); 1008 } else { 1009 stopSelectionActionMode(); 1010 startSelectionActionModeWithSelectionAndStartDrag(); 1011 } 1012 handled = true; 1013 } 1014 1015 // Start a new selection 1016 if (!handled) { 1017 handled = startSelectionActionModeWithSelectionAndStartDrag(); 1018 } 1019 1020 return handled; 1021 } 1022 1023 private long getLastTouchOffsets() { 1024 SelectionModifierCursorController selectionController = getSelectionController(); 1025 final int minOffset = selectionController.getMinTouchOffset(); 1026 final int maxOffset = selectionController.getMaxTouchOffset(); 1027 return TextUtils.packRangeInLong(minOffset, maxOffset); 1028 } 1029 1030 void onFocusChanged(boolean focused, int direction) { 1031 mShowCursor = SystemClock.uptimeMillis(); 1032 ensureEndedBatchEdit(); 1033 1034 if (focused) { 1035 int selStart = mTextView.getSelectionStart(); 1036 int selEnd = mTextView.getSelectionEnd(); 1037 1038 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1039 // mode for these, unless there was a specific selection already started. 1040 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1041 selEnd == mTextView.getText().length(); 1042 1043 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1044 !isFocusHighlighted; 1045 1046 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1047 // If a tap was used to give focus to that view, move cursor at tap position. 1048 // Has to be done before onTakeFocus, which can be overloaded. 1049 final int lastTapPosition = getLastTapPosition(); 1050 if (lastTapPosition >= 0) { 1051 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1052 } 1053 1054 // Note this may have to be moved out of the Editor class 1055 MovementMethod mMovement = mTextView.getMovementMethod(); 1056 if (mMovement != null) { 1057 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1058 } 1059 1060 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1061 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1062 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1063 // This special case ensure that we keep current selection in that case. 1064 // It would be better to know why the DecorView does not have focus at that time. 1065 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1066 selStart >= 0 && selEnd >= 0) { 1067 /* 1068 * Someone intentionally set the selection, so let them 1069 * do whatever it is that they wanted to do instead of 1070 * the default on-focus behavior. We reset the selection 1071 * here instead of just skipping the onTakeFocus() call 1072 * because some movement methods do something other than 1073 * just setting the selection in theirs and we still 1074 * need to go through that path. 1075 */ 1076 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1077 } 1078 1079 if (mSelectAllOnFocus) { 1080 mTextView.selectAllText(); 1081 } 1082 1083 mTouchFocusSelected = true; 1084 } 1085 1086 mFrozenWithFocus = false; 1087 mSelectionMoved = false; 1088 1089 if (mError != null) { 1090 showError(); 1091 } 1092 1093 makeBlink(); 1094 } else { 1095 if (mError != null) { 1096 hideError(); 1097 } 1098 // Don't leave us in the middle of a batch edit. 1099 mTextView.onEndBatchEdit(); 1100 1101 if (mTextView instanceof ExtractEditText) { 1102 // terminateTextSelectionMode removes selection, which we want to keep when 1103 // ExtractEditText goes out of focus. 1104 final int selStart = mTextView.getSelectionStart(); 1105 final int selEnd = mTextView.getSelectionEnd(); 1106 hideControllers(); 1107 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1108 } else { 1109 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1110 hideControllers(); 1111 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1112 downgradeEasyCorrectionSpans(); 1113 } 1114 1115 // No need to create the controller 1116 if (mSelectionModifierCursorController != null) { 1117 mSelectionModifierCursorController.resetTouchOffsets(); 1118 } 1119 } 1120 } 1121 1122 /** 1123 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1124 * span. 1125 */ 1126 private void downgradeEasyCorrectionSpans() { 1127 CharSequence text = mTextView.getText(); 1128 if (text instanceof Spannable) { 1129 Spannable spannable = (Spannable) text; 1130 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1131 spannable.length(), SuggestionSpan.class); 1132 for (int i = 0; i < suggestionSpans.length; i++) { 1133 int flags = suggestionSpans[i].getFlags(); 1134 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1135 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1136 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1137 suggestionSpans[i].setFlags(flags); 1138 } 1139 } 1140 } 1141 } 1142 1143 void sendOnTextChanged(int start, int after) { 1144 updateSpellCheckSpans(start, start + after, false); 1145 1146 // Flip flag to indicate the word iterator needs to have the text reset. 1147 mUpdateWordIteratorText = true; 1148 1149 // Hide the controllers as soon as text is modified (typing, procedural...) 1150 // We do not hide the span controllers, since they can be added when a new text is 1151 // inserted into the text view (voice IME). 1152 hideCursorControllers(); 1153 } 1154 1155 private int getLastTapPosition() { 1156 // No need to create the controller at that point, no last tap position saved 1157 if (mSelectionModifierCursorController != null) { 1158 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1159 if (lastTapPosition >= 0) { 1160 // Safety check, should not be possible. 1161 if (lastTapPosition > mTextView.getText().length()) { 1162 lastTapPosition = mTextView.getText().length(); 1163 } 1164 return lastTapPosition; 1165 } 1166 } 1167 1168 return -1; 1169 } 1170 1171 void onWindowFocusChanged(boolean hasWindowFocus) { 1172 if (hasWindowFocus) { 1173 if (mBlink != null) { 1174 mBlink.uncancel(); 1175 makeBlink(); 1176 } 1177 } else { 1178 if (mBlink != null) { 1179 mBlink.cancel(); 1180 } 1181 if (mInputContentType != null) { 1182 mInputContentType.enterDown = false; 1183 } 1184 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1185 hideControllers(); 1186 if (mSuggestionsPopupWindow != null) { 1187 mSuggestionsPopupWindow.onParentLostFocus(); 1188 } 1189 1190 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1191 ensureEndedBatchEdit(); 1192 } 1193 } 1194 1195 void onTouchEvent(MotionEvent event) { 1196 if (hasSelectionController()) { 1197 getSelectionController().onTouchEvent(event); 1198 } 1199 1200 if (mShowSuggestionRunnable != null) { 1201 mTextView.removeCallbacks(mShowSuggestionRunnable); 1202 mShowSuggestionRunnable = null; 1203 } 1204 1205 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1206 mLastDownPositionX = event.getX(); 1207 mLastDownPositionY = event.getY(); 1208 1209 // Reset this state; it will be re-set if super.onTouchEvent 1210 // causes focus to move to the view. 1211 mTouchFocusSelected = false; 1212 mIgnoreActionUpEvent = false; 1213 } 1214 } 1215 1216 public void beginBatchEdit() { 1217 mInBatchEditControllers = true; 1218 final InputMethodState ims = mInputMethodState; 1219 if (ims != null) { 1220 int nesting = ++ims.mBatchEditNesting; 1221 if (nesting == 1) { 1222 ims.mCursorChanged = false; 1223 ims.mChangedDelta = 0; 1224 if (ims.mContentChanged) { 1225 // We already have a pending change from somewhere else, 1226 // so turn this into a full update. 1227 ims.mChangedStart = 0; 1228 ims.mChangedEnd = mTextView.getText().length(); 1229 } else { 1230 ims.mChangedStart = EXTRACT_UNKNOWN; 1231 ims.mChangedEnd = EXTRACT_UNKNOWN; 1232 ims.mContentChanged = false; 1233 } 1234 mUndoInputFilter.beginBatchEdit(); 1235 mTextView.onBeginBatchEdit(); 1236 } 1237 } 1238 } 1239 1240 public void endBatchEdit() { 1241 mInBatchEditControllers = false; 1242 final InputMethodState ims = mInputMethodState; 1243 if (ims != null) { 1244 int nesting = --ims.mBatchEditNesting; 1245 if (nesting == 0) { 1246 finishBatchEdit(ims); 1247 } 1248 } 1249 } 1250 1251 void ensureEndedBatchEdit() { 1252 final InputMethodState ims = mInputMethodState; 1253 if (ims != null && ims.mBatchEditNesting != 0) { 1254 ims.mBatchEditNesting = 0; 1255 finishBatchEdit(ims); 1256 } 1257 } 1258 1259 void finishBatchEdit(final InputMethodState ims) { 1260 mTextView.onEndBatchEdit(); 1261 mUndoInputFilter.endBatchEdit(); 1262 1263 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1264 mTextView.updateAfterEdit(); 1265 reportExtractedText(); 1266 } else if (ims.mCursorChanged) { 1267 // Cheesy way to get us to report the current cursor location. 1268 mTextView.invalidateCursor(); 1269 } 1270 // sendUpdateSelection knows to avoid sending if the selection did 1271 // not actually change. 1272 sendUpdateSelection(); 1273 } 1274 1275 static final int EXTRACT_NOTHING = -2; 1276 static final int EXTRACT_UNKNOWN = -1; 1277 1278 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1279 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1280 EXTRACT_UNKNOWN, outText); 1281 } 1282 1283 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1284 int partialStartOffset, int partialEndOffset, int delta, 1285 @Nullable ExtractedText outText) { 1286 if (request == null || outText == null) { 1287 return false; 1288 } 1289 1290 final CharSequence content = mTextView.getText(); 1291 if (content == null) { 1292 return false; 1293 } 1294 1295 if (partialStartOffset != EXTRACT_NOTHING) { 1296 final int N = content.length(); 1297 if (partialStartOffset < 0) { 1298 outText.partialStartOffset = outText.partialEndOffset = -1; 1299 partialStartOffset = 0; 1300 partialEndOffset = N; 1301 } else { 1302 // Now use the delta to determine the actual amount of text 1303 // we need. 1304 partialEndOffset += delta; 1305 // Adjust offsets to ensure we contain full spans. 1306 if (content instanceof Spanned) { 1307 Spanned spanned = (Spanned)content; 1308 Object[] spans = spanned.getSpans(partialStartOffset, 1309 partialEndOffset, ParcelableSpan.class); 1310 int i = spans.length; 1311 while (i > 0) { 1312 i--; 1313 int j = spanned.getSpanStart(spans[i]); 1314 if (j < partialStartOffset) partialStartOffset = j; 1315 j = spanned.getSpanEnd(spans[i]); 1316 if (j > partialEndOffset) partialEndOffset = j; 1317 } 1318 } 1319 outText.partialStartOffset = partialStartOffset; 1320 outText.partialEndOffset = partialEndOffset - delta; 1321 1322 if (partialStartOffset > N) { 1323 partialStartOffset = N; 1324 } else if (partialStartOffset < 0) { 1325 partialStartOffset = 0; 1326 } 1327 if (partialEndOffset > N) { 1328 partialEndOffset = N; 1329 } else if (partialEndOffset < 0) { 1330 partialEndOffset = 0; 1331 } 1332 } 1333 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1334 outText.text = content.subSequence(partialStartOffset, 1335 partialEndOffset); 1336 } else { 1337 outText.text = TextUtils.substring(content, partialStartOffset, 1338 partialEndOffset); 1339 } 1340 } else { 1341 outText.partialStartOffset = 0; 1342 outText.partialEndOffset = 0; 1343 outText.text = ""; 1344 } 1345 outText.flags = 0; 1346 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1347 outText.flags |= ExtractedText.FLAG_SELECTING; 1348 } 1349 if (mTextView.isSingleLine()) { 1350 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1351 } 1352 outText.startOffset = 0; 1353 outText.selectionStart = mTextView.getSelectionStart(); 1354 outText.selectionEnd = mTextView.getSelectionEnd(); 1355 return true; 1356 } 1357 1358 boolean reportExtractedText() { 1359 final Editor.InputMethodState ims = mInputMethodState; 1360 if (ims != null) { 1361 final boolean contentChanged = ims.mContentChanged; 1362 if (contentChanged || ims.mSelectionModeChanged) { 1363 ims.mContentChanged = false; 1364 ims.mSelectionModeChanged = false; 1365 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1366 if (req != null) { 1367 InputMethodManager imm = InputMethodManager.peekInstance(); 1368 if (imm != null) { 1369 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1370 "Retrieving extracted start=" + ims.mChangedStart + 1371 " end=" + ims.mChangedEnd + 1372 " delta=" + ims.mChangedDelta); 1373 if (ims.mChangedStart < 0 && !contentChanged) { 1374 ims.mChangedStart = EXTRACT_NOTHING; 1375 } 1376 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1377 ims.mChangedDelta, ims.mExtractedText)) { 1378 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1379 "Reporting extracted start=" + 1380 ims.mExtractedText.partialStartOffset + 1381 " end=" + ims.mExtractedText.partialEndOffset + 1382 ": " + ims.mExtractedText.text); 1383 1384 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1385 ims.mChangedStart = EXTRACT_UNKNOWN; 1386 ims.mChangedEnd = EXTRACT_UNKNOWN; 1387 ims.mChangedDelta = 0; 1388 ims.mContentChanged = false; 1389 return true; 1390 } 1391 } 1392 } 1393 } 1394 } 1395 return false; 1396 } 1397 1398 private void sendUpdateSelection() { 1399 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1400 final InputMethodManager imm = InputMethodManager.peekInstance(); 1401 if (null != imm) { 1402 final int selectionStart = mTextView.getSelectionStart(); 1403 final int selectionEnd = mTextView.getSelectionEnd(); 1404 int candStart = -1; 1405 int candEnd = -1; 1406 if (mTextView.getText() instanceof Spannable) { 1407 final Spannable sp = (Spannable) mTextView.getText(); 1408 candStart = EditableInputConnection.getComposingSpanStart(sp); 1409 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1410 } 1411 // InputMethodManager#updateSelection skips sending the message if 1412 // none of the parameters have changed since the last time we called it. 1413 imm.updateSelection(mTextView, 1414 selectionStart, selectionEnd, candStart, candEnd); 1415 } 1416 } 1417 } 1418 1419 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1420 int cursorOffsetVertical) { 1421 final int selectionStart = mTextView.getSelectionStart(); 1422 final int selectionEnd = mTextView.getSelectionEnd(); 1423 1424 final InputMethodState ims = mInputMethodState; 1425 if (ims != null && ims.mBatchEditNesting == 0) { 1426 InputMethodManager imm = InputMethodManager.peekInstance(); 1427 if (imm != null) { 1428 if (imm.isActive(mTextView)) { 1429 boolean reported = false; 1430 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1431 // We are in extract mode and the content has changed 1432 // in some way... just report complete new text to the 1433 // input method. 1434 reported = reportExtractedText(); 1435 } 1436 } 1437 } 1438 } 1439 1440 if (mCorrectionHighlighter != null) { 1441 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1442 } 1443 1444 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1445 drawCursor(canvas, cursorOffsetVertical); 1446 // Rely on the drawable entirely, do not draw the cursor line. 1447 // Has to be done after the IMM related code above which relies on the highlight. 1448 highlight = null; 1449 } 1450 1451 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1452 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1453 cursorOffsetVertical); 1454 } else { 1455 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1456 } 1457 } 1458 1459 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1460 Paint highlightPaint, int cursorOffsetVertical) { 1461 final long lineRange = layout.getLineRangeForDraw(canvas); 1462 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1463 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1464 if (lastLine < 0) return; 1465 1466 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1467 firstLine, lastLine); 1468 1469 if (layout instanceof DynamicLayout) { 1470 if (mTextDisplayLists == null) { 1471 mTextDisplayLists = ArrayUtils.emptyArray(TextDisplayList.class); 1472 } 1473 1474 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1475 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1476 int[] blockIndices = dynamicLayout.getBlockIndices(); 1477 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1478 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1479 1480 int endOfPreviousBlock = -1; 1481 int searchStartIndex = 0; 1482 for (int i = 0; i < numberOfBlocks; i++) { 1483 int blockEndLine = blockEndLines[i]; 1484 int blockIndex = blockIndices[i]; 1485 1486 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1487 if (blockIsInvalid) { 1488 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1489 searchStartIndex); 1490 // Note how dynamic layout's internal block indices get updated from Editor 1491 blockIndices[i] = blockIndex; 1492 if (mTextDisplayLists[blockIndex] != null) { 1493 mTextDisplayLists[blockIndex].isDirty = true; 1494 } 1495 searchStartIndex = blockIndex + 1; 1496 } 1497 1498 if (mTextDisplayLists[blockIndex] == null) { 1499 mTextDisplayLists[blockIndex] = 1500 new TextDisplayList("Text " + blockIndex); 1501 } 1502 1503 final boolean blockDisplayListIsInvalid = mTextDisplayLists[blockIndex].needsRecord(); 1504 RenderNode blockDisplayList = mTextDisplayLists[blockIndex].displayList; 1505 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1506 final int blockBeginLine = endOfPreviousBlock + 1; 1507 final int top = layout.getLineTop(blockBeginLine); 1508 final int bottom = layout.getLineBottom(blockEndLine); 1509 int left = 0; 1510 int right = mTextView.getWidth(); 1511 if (mTextView.getHorizontallyScrolling()) { 1512 float min = Float.MAX_VALUE; 1513 float max = Float.MIN_VALUE; 1514 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1515 min = Math.min(min, layout.getLineLeft(line)); 1516 max = Math.max(max, layout.getLineRight(line)); 1517 } 1518 left = (int) min; 1519 right = (int) (max + 0.5f); 1520 } 1521 1522 // Rebuild display list if it is invalid 1523 if (blockDisplayListIsInvalid) { 1524 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1525 right - left, bottom - top); 1526 try { 1527 // drawText is always relative to TextView's origin, this translation 1528 // brings this range of text back to the top left corner of the viewport 1529 displayListCanvas.translate(-left, -top); 1530 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1531 mTextDisplayLists[blockIndex].isDirty = false; 1532 // No need to untranslate, previous context is popped after 1533 // drawDisplayList 1534 } finally { 1535 blockDisplayList.end(displayListCanvas); 1536 // Same as drawDisplayList below, handled by our TextView's parent 1537 blockDisplayList.setClipToBounds(false); 1538 } 1539 } 1540 1541 // Valid disply list whose index is >= indexFirstChangedBlock 1542 // only needs to update its drawing location. 1543 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1544 } 1545 1546 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList, 1547 0 /* no child clipping, our TextView parent enforces it */); 1548 1549 endOfPreviousBlock = blockEndLine; 1550 } 1551 1552 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1553 } else { 1554 // Boring layout is used for empty and hint text 1555 layout.drawText(canvas, firstLine, lastLine); 1556 } 1557 } 1558 1559 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1560 int searchStartIndex) { 1561 int length = mTextDisplayLists.length; 1562 for (int i = searchStartIndex; i < length; i++) { 1563 boolean blockIndexFound = false; 1564 for (int j = 0; j < numberOfBlocks; j++) { 1565 if (blockIndices[j] == i) { 1566 blockIndexFound = true; 1567 break; 1568 } 1569 } 1570 if (blockIndexFound) continue; 1571 return i; 1572 } 1573 1574 // No available index found, the pool has to grow 1575 mTextDisplayLists = GrowingArrayUtils.append(mTextDisplayLists, length, null); 1576 return length; 1577 } 1578 1579 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1580 final boolean translate = cursorOffsetVertical != 0; 1581 if (translate) canvas.translate(0, cursorOffsetVertical); 1582 for (int i = 0; i < mCursorCount; i++) { 1583 mCursorDrawable[i].draw(canvas); 1584 } 1585 if (translate) canvas.translate(0, -cursorOffsetVertical); 1586 } 1587 1588 /** 1589 * Invalidates all the sub-display lists that overlap the specified character range 1590 */ 1591 void invalidateTextDisplayList(Layout layout, int start, int end) { 1592 if (mTextDisplayLists != null && layout instanceof DynamicLayout) { 1593 final int firstLine = layout.getLineForOffset(start); 1594 final int lastLine = layout.getLineForOffset(end); 1595 1596 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1597 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1598 int[] blockIndices = dynamicLayout.getBlockIndices(); 1599 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1600 1601 int i = 0; 1602 // Skip the blocks before firstLine 1603 while (i < numberOfBlocks) { 1604 if (blockEndLines[i] >= firstLine) break; 1605 i++; 1606 } 1607 1608 // Invalidate all subsequent blocks until lastLine is passed 1609 while (i < numberOfBlocks) { 1610 final int blockIndex = blockIndices[i]; 1611 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1612 mTextDisplayLists[blockIndex].isDirty = true; 1613 } 1614 if (blockEndLines[i] >= lastLine) break; 1615 i++; 1616 } 1617 } 1618 } 1619 1620 void invalidateTextDisplayList() { 1621 if (mTextDisplayLists != null) { 1622 for (int i = 0; i < mTextDisplayLists.length; i++) { 1623 if (mTextDisplayLists[i] != null) mTextDisplayLists[i].isDirty = true; 1624 } 1625 } 1626 } 1627 1628 void updateCursorsPositions() { 1629 if (mTextView.mCursorDrawableRes == 0) { 1630 mCursorCount = 0; 1631 return; 1632 } 1633 1634 Layout layout = mTextView.getLayout(); 1635 Layout hintLayout = mTextView.getHintLayout(); 1636 final int offset = mTextView.getSelectionStart(); 1637 final int line = layout.getLineForOffset(offset); 1638 final int top = layout.getLineTop(line); 1639 final int bottom = layout.getLineTop(line + 1); 1640 1641 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1642 1643 int middle = bottom; 1644 if (mCursorCount == 2) { 1645 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1646 middle = (top + bottom) >> 1; 1647 } 1648 1649 boolean clamped = layout.shouldClampCursor(line); 1650 updateCursorPosition(0, top, middle, 1651 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1652 1653 if (mCursorCount == 2) { 1654 updateCursorPosition(1, middle, bottom, 1655 layout.getSecondaryHorizontal(offset, clamped)); 1656 } 1657 } 1658 1659 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1660 boolean clamped) { 1661 if (TextUtils.isEmpty(layout.getText()) && 1662 hintLayout != null && 1663 !TextUtils.isEmpty(hintLayout.getText())) { 1664 return hintLayout.getPrimaryHorizontal(offset, clamped); 1665 } else { 1666 return layout.getPrimaryHorizontal(offset, clamped); 1667 } 1668 } 1669 1670 /** 1671 * @return true if the selection mode was actually started. 1672 */ 1673 private boolean startSelectionActionModeWithoutSelection() { 1674 if (mSelectionActionMode != null) { 1675 // Selection action mode is already started 1676 // TODO: revisit invocations to minimize this case. 1677 mSelectionActionMode.invalidate(); 1678 return false; 1679 } 1680 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1681 mSelectionActionMode = mTextView.startActionMode( 1682 actionModeCallback, ActionMode.TYPE_FLOATING); 1683 return mSelectionActionMode != null; 1684 } 1685 1686 /** 1687 * Starts a Selection Action Mode with the current selection and enters drag mode. This should 1688 * be used whenever the mode is started from a touch event. 1689 * 1690 * @return true if the selection mode was actually started. 1691 */ 1692 private boolean startSelectionActionModeWithSelectionAndStartDrag() { 1693 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1694 if (selectionStarted) { 1695 getSelectionController().enterDrag(); 1696 } 1697 return selectionStarted; 1698 } 1699 1700 /** 1701 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1702 * are shown. This should be used when the mode is started from a non-touch event. 1703 * 1704 * @return true if the selection mode was actually started. 1705 */ 1706 boolean startSelectionActionModeWithSelection() { 1707 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1708 if (selectionStarted) { 1709 getSelectionController().show(); 1710 } 1711 return selectionStarted; 1712 } 1713 1714 private boolean startSelectionActionModeWithSelectionInternal() { 1715 if (mSelectionActionMode != null) { 1716 // Selection action mode is already started 1717 mSelectionActionMode.invalidate(); 1718 return false; 1719 } 1720 1721 if (!canSelectText() || !mTextView.requestFocus()) { 1722 Log.w(TextView.LOG_TAG, 1723 "TextView does not support text selection. Action mode cancelled."); 1724 return false; 1725 } 1726 1727 if (!mTextView.hasSelection()) { 1728 // There may already be a selection on device rotation 1729 if (!selectCurrentWord()) { 1730 // No word found under cursor or text selection not permitted. 1731 return false; 1732 } 1733 } 1734 1735 boolean willExtract = extractedTextModeWillBeStarted(); 1736 1737 // Do not start the action mode when extracted text will show up full screen, which would 1738 // immediately hide the newly created action bar and would be visually distracting. 1739 if (!willExtract) { 1740 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1741 mSelectionActionMode = mTextView.startActionMode( 1742 actionModeCallback, ActionMode.TYPE_FLOATING); 1743 } 1744 1745 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1746 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1747 // Show the IME to be able to replace text, except when selecting non editable text. 1748 final InputMethodManager imm = InputMethodManager.peekInstance(); 1749 if (imm != null) { 1750 imm.showSoftInput(mTextView, 0, null); 1751 } 1752 } 1753 return selectionStarted; 1754 } 1755 1756 private boolean extractedTextModeWillBeStarted() { 1757 if (!(mTextView instanceof ExtractEditText)) { 1758 final InputMethodManager imm = InputMethodManager.peekInstance(); 1759 return imm != null && imm.isFullscreenMode(); 1760 } 1761 return false; 1762 } 1763 1764 /** 1765 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1766 * the current cursor position or selection range. This method is consistent with the 1767 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1768 */ 1769 private boolean shouldOfferToShowSuggestions() { 1770 CharSequence text = mTextView.getText(); 1771 if (!(text instanceof Spannable)) return false; 1772 1773 final Spannable spannable = (Spannable) text; 1774 final int selectionStart = mTextView.getSelectionStart(); 1775 final int selectionEnd = mTextView.getSelectionEnd(); 1776 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1777 SuggestionSpan.class); 1778 if (suggestionSpans.length == 0) { 1779 return false; 1780 } 1781 if (selectionStart == selectionEnd) { 1782 // Spans overlap the cursor. 1783 return true; 1784 } 1785 int minSpanStart = mTextView.getText().length(); 1786 int maxSpanEnd = 0; 1787 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1788 int unionOfSpansCoveringSelectionStartEnd = 0; 1789 for (int i = 0; i < suggestionSpans.length; i++) { 1790 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1791 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1792 minSpanStart = Math.min(minSpanStart, spanStart); 1793 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1794 if (selectionStart < spanStart || selectionStart > spanEnd) { 1795 // The span doesn't cover the current selection start point. 1796 continue; 1797 } 1798 unionOfSpansCoveringSelectionStartStart = 1799 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1800 unionOfSpansCoveringSelectionStartEnd = 1801 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1802 } 1803 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1804 // No spans cover the selection start point. 1805 return false; 1806 } 1807 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1808 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1809 // There is a span that is not covered by the union. In this case, we soouldn't offer 1810 // to show suggestions as it's confusing. 1811 return false; 1812 } 1813 return true; 1814 } 1815 1816 /** 1817 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1818 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1819 */ 1820 private boolean isCursorInsideEasyCorrectionSpan() { 1821 Spannable spannable = (Spannable) mTextView.getText(); 1822 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1823 mTextView.getSelectionEnd(), SuggestionSpan.class); 1824 for (int i = 0; i < suggestionSpans.length; i++) { 1825 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1826 return true; 1827 } 1828 } 1829 return false; 1830 } 1831 1832 void onTouchUpEvent(MotionEvent event) { 1833 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1834 hideControllers(); 1835 CharSequence text = mTextView.getText(); 1836 if (!selectAllGotFocus && text.length() > 0) { 1837 // Move cursor 1838 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1839 Selection.setSelection((Spannable) text, offset); 1840 if (mSpellChecker != null) { 1841 // When the cursor moves, the word that was typed may need spell check 1842 mSpellChecker.onSelectionChanged(); 1843 } 1844 if (!extractedTextModeWillBeStarted()) { 1845 if (isCursorInsideEasyCorrectionSpan()) { 1846 mShowSuggestionRunnable = new Runnable() { 1847 public void run() { 1848 showSuggestions(); 1849 } 1850 }; 1851 // removeCallbacks is performed on every touch 1852 mTextView.postDelayed(mShowSuggestionRunnable, 1853 ViewConfiguration.getDoubleTapTimeout()); 1854 } else if (hasInsertionController()) { 1855 getInsertionController().show(); 1856 } 1857 } 1858 } 1859 } 1860 1861 protected void stopSelectionActionMode() { 1862 if (mSelectionActionMode != null) { 1863 // This will hide the mSelectionModifierCursorController 1864 mSelectionActionMode.finish(); 1865 } 1866 } 1867 1868 /** 1869 * @return True if this view supports insertion handles. 1870 */ 1871 boolean hasInsertionController() { 1872 return mInsertionControllerEnabled; 1873 } 1874 1875 /** 1876 * @return True if this view supports selection handles. 1877 */ 1878 boolean hasSelectionController() { 1879 return mSelectionControllerEnabled; 1880 } 1881 1882 InsertionPointCursorController getInsertionController() { 1883 if (!mInsertionControllerEnabled) { 1884 return null; 1885 } 1886 1887 if (mInsertionPointCursorController == null) { 1888 mInsertionPointCursorController = new InsertionPointCursorController(); 1889 1890 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1891 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1892 } 1893 1894 return mInsertionPointCursorController; 1895 } 1896 1897 SelectionModifierCursorController getSelectionController() { 1898 if (!mSelectionControllerEnabled) { 1899 return null; 1900 } 1901 1902 if (mSelectionModifierCursorController == null) { 1903 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1904 1905 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1906 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1907 } 1908 1909 return mSelectionModifierCursorController; 1910 } 1911 1912 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1913 if (mCursorDrawable[cursorIndex] == null) 1914 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1915 mTextView.mCursorDrawableRes); 1916 1917 if (mTempRect == null) mTempRect = new Rect(); 1918 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1919 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1920 horizontal = Math.max(0.5f, horizontal - 0.5f); 1921 final int left = (int) (horizontal) - mTempRect.left; 1922 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1923 bottom + mTempRect.bottom); 1924 } 1925 1926 /** 1927 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1928 * a dictionary) from the current input method, provided by it calling 1929 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1930 * implementation flashes the background of the corrected word to provide feedback to the user. 1931 * 1932 * @param info The auto correct info about the text that was corrected. 1933 */ 1934 public void onCommitCorrection(CorrectionInfo info) { 1935 if (mCorrectionHighlighter == null) { 1936 mCorrectionHighlighter = new CorrectionHighlighter(); 1937 } else { 1938 mCorrectionHighlighter.invalidate(false); 1939 } 1940 1941 mCorrectionHighlighter.highlight(info); 1942 } 1943 1944 void showSuggestions() { 1945 if (mSuggestionsPopupWindow == null) { 1946 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1947 } 1948 hideControllers(); 1949 mSuggestionsPopupWindow.show(); 1950 } 1951 1952 boolean areSuggestionsShown() { 1953 return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing(); 1954 } 1955 1956 void onScrollChanged() { 1957 if (mPositionListener != null) { 1958 mPositionListener.onScrollChanged(); 1959 } 1960 } 1961 1962 /** 1963 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1964 */ 1965 private boolean shouldBlink() { 1966 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1967 1968 final int start = mTextView.getSelectionStart(); 1969 if (start < 0) return false; 1970 1971 final int end = mTextView.getSelectionEnd(); 1972 if (end < 0) return false; 1973 1974 return start == end; 1975 } 1976 1977 void makeBlink() { 1978 if (shouldBlink()) { 1979 mShowCursor = SystemClock.uptimeMillis(); 1980 if (mBlink == null) mBlink = new Blink(); 1981 mBlink.removeCallbacks(mBlink); 1982 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 1983 } else { 1984 if (mBlink != null) mBlink.removeCallbacks(mBlink); 1985 } 1986 } 1987 1988 private class Blink extends Handler implements Runnable { 1989 private boolean mCancelled; 1990 1991 public void run() { 1992 if (mCancelled) { 1993 return; 1994 } 1995 1996 removeCallbacks(Blink.this); 1997 1998 if (shouldBlink()) { 1999 if (mTextView.getLayout() != null) { 2000 mTextView.invalidateCursorPath(); 2001 } 2002 2003 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 2004 } 2005 } 2006 2007 void cancel() { 2008 if (!mCancelled) { 2009 removeCallbacks(Blink.this); 2010 mCancelled = true; 2011 } 2012 } 2013 2014 void uncancel() { 2015 mCancelled = false; 2016 } 2017 } 2018 2019 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 2020 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2021 com.android.internal.R.layout.text_drag_thumbnail, null); 2022 2023 if (shadowView == null) { 2024 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2025 } 2026 2027 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2028 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2029 } 2030 shadowView.setText(text); 2031 shadowView.setTextColor(mTextView.getTextColors()); 2032 2033 shadowView.setTextAppearance(mTextView.getContext(), R.styleable.Theme_textAppearanceLarge); 2034 shadowView.setGravity(Gravity.CENTER); 2035 2036 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2037 ViewGroup.LayoutParams.WRAP_CONTENT)); 2038 2039 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2040 shadowView.measure(size, size); 2041 2042 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2043 shadowView.invalidate(); 2044 return new DragShadowBuilder(shadowView); 2045 } 2046 2047 private static class DragLocalState { 2048 public TextView sourceTextView; 2049 public int start, end; 2050 2051 public DragLocalState(TextView sourceTextView, int start, int end) { 2052 this.sourceTextView = sourceTextView; 2053 this.start = start; 2054 this.end = end; 2055 } 2056 } 2057 2058 void onDrop(DragEvent event) { 2059 StringBuilder content = new StringBuilder(""); 2060 ClipData clipData = event.getClipData(); 2061 final int itemCount = clipData.getItemCount(); 2062 for (int i=0; i < itemCount; i++) { 2063 Item item = clipData.getItemAt(i); 2064 content.append(item.coerceToStyledText(mTextView.getContext())); 2065 } 2066 2067 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2068 2069 Object localState = event.getLocalState(); 2070 DragLocalState dragLocalState = null; 2071 if (localState instanceof DragLocalState) { 2072 dragLocalState = (DragLocalState) localState; 2073 } 2074 boolean dragDropIntoItself = dragLocalState != null && 2075 dragLocalState.sourceTextView == mTextView; 2076 2077 if (dragDropIntoItself) { 2078 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2079 // A drop inside the original selection discards the drop. 2080 return; 2081 } 2082 } 2083 2084 final int originalLength = mTextView.getText().length(); 2085 int min = offset; 2086 int max = offset; 2087 2088 Selection.setSelection((Spannable) mTextView.getText(), max); 2089 mTextView.replaceText_internal(min, max, content); 2090 2091 if (dragDropIntoItself) { 2092 int dragSourceStart = dragLocalState.start; 2093 int dragSourceEnd = dragLocalState.end; 2094 if (max <= dragSourceStart) { 2095 // Inserting text before selection has shifted positions 2096 final int shift = mTextView.getText().length() - originalLength; 2097 dragSourceStart += shift; 2098 dragSourceEnd += shift; 2099 } 2100 2101 // Delete original selection 2102 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2103 2104 // Make sure we do not leave two adjacent spaces. 2105 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2106 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2107 if (nextCharIdx > prevCharIdx + 1) { 2108 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2109 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2110 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2111 } 2112 } 2113 } 2114 } 2115 2116 public void addSpanWatchers(Spannable text) { 2117 final int textLength = text.length(); 2118 2119 if (mKeyListener != null) { 2120 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2121 } 2122 2123 if (mSpanController == null) { 2124 mSpanController = new SpanController(); 2125 } 2126 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2127 } 2128 2129 /** 2130 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2131 * pop-up should be displayed. 2132 * Also monitors {@link Selection} to call back to the attached input method. 2133 */ 2134 class SpanController implements SpanWatcher { 2135 2136 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2137 2138 private EasyEditPopupWindow mPopupWindow; 2139 2140 private Runnable mHidePopup; 2141 2142 // This function is pure but inner classes can't have static functions 2143 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2144 final Object span) { 2145 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2146 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2147 } 2148 2149 @Override 2150 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2151 if (isNonIntermediateSelectionSpan(text, span)) { 2152 sendUpdateSelection(); 2153 } else if (span instanceof EasyEditSpan) { 2154 if (mPopupWindow == null) { 2155 mPopupWindow = new EasyEditPopupWindow(); 2156 mHidePopup = new Runnable() { 2157 @Override 2158 public void run() { 2159 hide(); 2160 } 2161 }; 2162 } 2163 2164 // Make sure there is only at most one EasyEditSpan in the text 2165 if (mPopupWindow.mEasyEditSpan != null) { 2166 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2167 } 2168 2169 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2170 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2171 @Override 2172 public void onDeleteClick(EasyEditSpan span) { 2173 Editable editable = (Editable) mTextView.getText(); 2174 int start = editable.getSpanStart(span); 2175 int end = editable.getSpanEnd(span); 2176 if (start >= 0 && end >= 0) { 2177 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2178 mTextView.deleteText_internal(start, end); 2179 } 2180 editable.removeSpan(span); 2181 } 2182 }); 2183 2184 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2185 // The window is not visible yet, ignore the text change. 2186 return; 2187 } 2188 2189 if (mTextView.getLayout() == null) { 2190 // The view has not been laid out yet, ignore the text change 2191 return; 2192 } 2193 2194 if (extractedTextModeWillBeStarted()) { 2195 // The input is in extract mode. Do not handle the easy edit in 2196 // the original TextView, as the ExtractEditText will do 2197 return; 2198 } 2199 2200 mPopupWindow.show(); 2201 mTextView.removeCallbacks(mHidePopup); 2202 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2203 } 2204 } 2205 2206 @Override 2207 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2208 if (isNonIntermediateSelectionSpan(text, span)) { 2209 sendUpdateSelection(); 2210 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2211 hide(); 2212 } 2213 } 2214 2215 @Override 2216 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2217 int newStart, int newEnd) { 2218 if (isNonIntermediateSelectionSpan(text, span)) { 2219 sendUpdateSelection(); 2220 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2221 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2222 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2223 text.removeSpan(easyEditSpan); 2224 } 2225 } 2226 2227 public void hide() { 2228 if (mPopupWindow != null) { 2229 mPopupWindow.hide(); 2230 mTextView.removeCallbacks(mHidePopup); 2231 } 2232 } 2233 2234 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2235 try { 2236 PendingIntent pendingIntent = span.getPendingIntent(); 2237 if (pendingIntent != null) { 2238 Intent intent = new Intent(); 2239 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2240 pendingIntent.send(mTextView.getContext(), 0, intent); 2241 } 2242 } catch (CanceledException e) { 2243 // This should not happen, as we should try to send the intent only once. 2244 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2245 } 2246 } 2247 } 2248 2249 /** 2250 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2251 */ 2252 private interface EasyEditDeleteListener { 2253 2254 /** 2255 * Clicks the delete pop-up. 2256 */ 2257 void onDeleteClick(EasyEditSpan span); 2258 } 2259 2260 /** 2261 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2262 * by {@link SpanController}. 2263 */ 2264 private class EasyEditPopupWindow extends PinnedPopupWindow 2265 implements OnClickListener { 2266 private static final int POPUP_TEXT_LAYOUT = 2267 com.android.internal.R.layout.text_edit_action_popup_text; 2268 private TextView mDeleteTextView; 2269 private EasyEditSpan mEasyEditSpan; 2270 private EasyEditDeleteListener mOnDeleteListener; 2271 2272 @Override 2273 protected void createPopupWindow() { 2274 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2275 com.android.internal.R.attr.textSelectHandleWindowStyle); 2276 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2277 mPopupWindow.setClippingEnabled(true); 2278 } 2279 2280 @Override 2281 protected void initContentView() { 2282 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2283 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2284 mContentView = linearLayout; 2285 mContentView.setBackgroundResource( 2286 com.android.internal.R.drawable.text_edit_side_paste_window); 2287 2288 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2289 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2290 2291 LayoutParams wrapContent = new LayoutParams( 2292 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2293 2294 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2295 mDeleteTextView.setLayoutParams(wrapContent); 2296 mDeleteTextView.setText(com.android.internal.R.string.delete); 2297 mDeleteTextView.setOnClickListener(this); 2298 mContentView.addView(mDeleteTextView); 2299 } 2300 2301 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2302 mEasyEditSpan = easyEditSpan; 2303 } 2304 2305 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2306 mOnDeleteListener = listener; 2307 } 2308 2309 @Override 2310 public void onClick(View view) { 2311 if (view == mDeleteTextView 2312 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2313 && mOnDeleteListener != null) { 2314 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2315 } 2316 } 2317 2318 @Override 2319 public void hide() { 2320 if (mEasyEditSpan != null) { 2321 mEasyEditSpan.setDeleteEnabled(false); 2322 } 2323 mOnDeleteListener = null; 2324 super.hide(); 2325 } 2326 2327 @Override 2328 protected int getTextOffset() { 2329 // Place the pop-up at the end of the span 2330 Editable editable = (Editable) mTextView.getText(); 2331 return editable.getSpanEnd(mEasyEditSpan); 2332 } 2333 2334 @Override 2335 protected int getVerticalLocalPosition(int line) { 2336 return mTextView.getLayout().getLineBottom(line); 2337 } 2338 2339 @Override 2340 protected int clipVertically(int positionY) { 2341 // As we display the pop-up below the span, no vertical clipping is required. 2342 return positionY; 2343 } 2344 } 2345 2346 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2347 // 3 handles 2348 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2349 // 1 CursorAnchorInfoNotifier 2350 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2351 private TextViewPositionListener[] mPositionListeners = 2352 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2353 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2354 private boolean mPositionHasChanged = true; 2355 // Absolute position of the TextView with respect to its parent window 2356 private int mPositionX, mPositionY; 2357 private int mNumberOfListeners; 2358 private boolean mScrollHasChanged; 2359 final int[] mTempCoords = new int[2]; 2360 2361 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2362 if (mNumberOfListeners == 0) { 2363 updatePosition(); 2364 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2365 vto.addOnPreDrawListener(this); 2366 } 2367 2368 int emptySlotIndex = -1; 2369 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2370 TextViewPositionListener listener = mPositionListeners[i]; 2371 if (listener == positionListener) { 2372 return; 2373 } else if (emptySlotIndex < 0 && listener == null) { 2374 emptySlotIndex = i; 2375 } 2376 } 2377 2378 mPositionListeners[emptySlotIndex] = positionListener; 2379 mCanMove[emptySlotIndex] = canMove; 2380 mNumberOfListeners++; 2381 } 2382 2383 public void removeSubscriber(TextViewPositionListener positionListener) { 2384 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2385 if (mPositionListeners[i] == positionListener) { 2386 mPositionListeners[i] = null; 2387 mNumberOfListeners--; 2388 break; 2389 } 2390 } 2391 2392 if (mNumberOfListeners == 0) { 2393 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2394 vto.removeOnPreDrawListener(this); 2395 } 2396 } 2397 2398 public int getPositionX() { 2399 return mPositionX; 2400 } 2401 2402 public int getPositionY() { 2403 return mPositionY; 2404 } 2405 2406 @Override 2407 public boolean onPreDraw() { 2408 updatePosition(); 2409 2410 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2411 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2412 TextViewPositionListener positionListener = mPositionListeners[i]; 2413 if (positionListener != null) { 2414 positionListener.updatePosition(mPositionX, mPositionY, 2415 mPositionHasChanged, mScrollHasChanged); 2416 } 2417 } 2418 } 2419 2420 mScrollHasChanged = false; 2421 return true; 2422 } 2423 2424 private void updatePosition() { 2425 mTextView.getLocationInWindow(mTempCoords); 2426 2427 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2428 2429 mPositionX = mTempCoords[0]; 2430 mPositionY = mTempCoords[1]; 2431 } 2432 2433 public void onScrollChanged() { 2434 mScrollHasChanged = true; 2435 } 2436 } 2437 2438 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2439 protected PopupWindow mPopupWindow; 2440 protected ViewGroup mContentView; 2441 int mPositionX, mPositionY; 2442 2443 protected abstract void createPopupWindow(); 2444 protected abstract void initContentView(); 2445 protected abstract int getTextOffset(); 2446 protected abstract int getVerticalLocalPosition(int line); 2447 protected abstract int clipVertically(int positionY); 2448 2449 public PinnedPopupWindow() { 2450 createPopupWindow(); 2451 2452 mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 2453 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2454 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2455 2456 initContentView(); 2457 2458 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2459 ViewGroup.LayoutParams.WRAP_CONTENT); 2460 mContentView.setLayoutParams(wrapContent); 2461 2462 mPopupWindow.setContentView(mContentView); 2463 } 2464 2465 public void show() { 2466 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2467 2468 computeLocalPosition(); 2469 2470 final PositionListener positionListener = getPositionListener(); 2471 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2472 } 2473 2474 protected void measureContent() { 2475 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2476 mContentView.measure( 2477 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2478 View.MeasureSpec.AT_MOST), 2479 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2480 View.MeasureSpec.AT_MOST)); 2481 } 2482 2483 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2484 * positioned according to viewportToContentHorizontalOffset. 2485 * 2486 * This method assumes that mContentView has properly been measured from its content. */ 2487 private void computeLocalPosition() { 2488 measureContent(); 2489 final int width = mContentView.getMeasuredWidth(); 2490 final int offset = getTextOffset(); 2491 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2492 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2493 2494 final int line = mTextView.getLayout().getLineForOffset(offset); 2495 mPositionY = getVerticalLocalPosition(line); 2496 mPositionY += mTextView.viewportToContentVerticalOffset(); 2497 } 2498 2499 private void updatePosition(int parentPositionX, int parentPositionY) { 2500 int positionX = parentPositionX + mPositionX; 2501 int positionY = parentPositionY + mPositionY; 2502 2503 positionY = clipVertically(positionY); 2504 2505 // Horizontal clipping 2506 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2507 final int width = mContentView.getMeasuredWidth(); 2508 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2509 positionX = Math.max(0, positionX); 2510 2511 if (isShowing()) { 2512 mPopupWindow.update(positionX, positionY, -1, -1); 2513 } else { 2514 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2515 positionX, positionY); 2516 } 2517 } 2518 2519 public void hide() { 2520 mPopupWindow.dismiss(); 2521 getPositionListener().removeSubscriber(this); 2522 } 2523 2524 @Override 2525 public void updatePosition(int parentPositionX, int parentPositionY, 2526 boolean parentPositionChanged, boolean parentScrolled) { 2527 // Either parentPositionChanged or parentScrolled is true, check if still visible 2528 if (isShowing() && isOffsetVisible(getTextOffset())) { 2529 if (parentScrolled) computeLocalPosition(); 2530 updatePosition(parentPositionX, parentPositionY); 2531 } else { 2532 hide(); 2533 } 2534 } 2535 2536 public boolean isShowing() { 2537 return mPopupWindow.isShowing(); 2538 } 2539 } 2540 2541 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2542 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2543 private static final int ADD_TO_DICTIONARY = -1; 2544 private static final int DELETE_TEXT = -2; 2545 private SuggestionInfo[] mSuggestionInfos; 2546 private int mNumberOfSuggestions; 2547 private boolean mCursorWasVisibleBeforeSuggestions; 2548 private boolean mIsShowingUp = false; 2549 private SuggestionAdapter mSuggestionsAdapter; 2550 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2551 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2552 2553 private class CustomPopupWindow extends PopupWindow { 2554 public CustomPopupWindow(Context context, int defStyleAttr) { 2555 super(context, null, defStyleAttr); 2556 } 2557 2558 @Override 2559 public void dismiss() { 2560 super.dismiss(); 2561 2562 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2563 2564 // Safe cast since show() checks that mTextView.getText() is an Editable 2565 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2566 2567 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2568 if (hasInsertionController()) { 2569 getInsertionController().show(); 2570 } 2571 } 2572 } 2573 2574 public SuggestionsPopupWindow() { 2575 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2576 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2577 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2578 } 2579 2580 @Override 2581 protected void createPopupWindow() { 2582 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2583 com.android.internal.R.attr.textSuggestionsWindowStyle); 2584 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2585 mPopupWindow.setFocusable(true); 2586 mPopupWindow.setClippingEnabled(false); 2587 } 2588 2589 @Override 2590 protected void initContentView() { 2591 ListView listView = new ListView(mTextView.getContext()); 2592 mSuggestionsAdapter = new SuggestionAdapter(); 2593 listView.setAdapter(mSuggestionsAdapter); 2594 listView.setOnItemClickListener(this); 2595 mContentView = listView; 2596 2597 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2598 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2599 for (int i = 0; i < mSuggestionInfos.length; i++) { 2600 mSuggestionInfos[i] = new SuggestionInfo(); 2601 } 2602 } 2603 2604 public boolean isShowingUp() { 2605 return mIsShowingUp; 2606 } 2607 2608 public void onParentLostFocus() { 2609 mIsShowingUp = false; 2610 } 2611 2612 private class SuggestionInfo { 2613 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2614 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2615 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2616 SpannableStringBuilder text = new SpannableStringBuilder(); 2617 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2618 android.R.style.TextAppearance_SuggestionHighlight); 2619 } 2620 2621 private class SuggestionAdapter extends BaseAdapter { 2622 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2623 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2624 2625 @Override 2626 public int getCount() { 2627 return mNumberOfSuggestions; 2628 } 2629 2630 @Override 2631 public Object getItem(int position) { 2632 return mSuggestionInfos[position]; 2633 } 2634 2635 @Override 2636 public long getItemId(int position) { 2637 return position; 2638 } 2639 2640 @Override 2641 public View getView(int position, View convertView, ViewGroup parent) { 2642 TextView textView = (TextView) convertView; 2643 2644 if (textView == null) { 2645 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2646 parent, false); 2647 } 2648 2649 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2650 textView.setText(suggestionInfo.text); 2651 2652 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2653 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2654 textView.setBackgroundColor(Color.TRANSPARENT); 2655 } else { 2656 textView.setBackgroundColor(Color.WHITE); 2657 } 2658 2659 return textView; 2660 } 2661 } 2662 2663 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2664 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2665 final int flag1 = span1.getFlags(); 2666 final int flag2 = span2.getFlags(); 2667 if (flag1 != flag2) { 2668 // The order here should match what is used in updateDrawState 2669 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2670 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2671 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2672 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2673 if (easy1 && !misspelled1) return -1; 2674 if (easy2 && !misspelled2) return 1; 2675 if (misspelled1) return -1; 2676 if (misspelled2) return 1; 2677 } 2678 2679 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2680 } 2681 } 2682 2683 /** 2684 * Returns the suggestion spans that cover the current cursor position. The suggestion 2685 * spans are sorted according to the length of text that they are attached to. 2686 */ 2687 private SuggestionSpan[] getSuggestionSpans() { 2688 int pos = mTextView.getSelectionStart(); 2689 Spannable spannable = (Spannable) mTextView.getText(); 2690 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2691 2692 mSpansLengths.clear(); 2693 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2694 int start = spannable.getSpanStart(suggestionSpan); 2695 int end = spannable.getSpanEnd(suggestionSpan); 2696 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2697 } 2698 2699 // The suggestions are sorted according to their types (easy correction first, then 2700 // misspelled) and to the length of the text that they cover (shorter first). 2701 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2702 return suggestionSpans; 2703 } 2704 2705 @Override 2706 public void show() { 2707 if (!(mTextView.getText() instanceof Editable)) return; 2708 2709 if (updateSuggestions()) { 2710 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2711 mTextView.setCursorVisible(false); 2712 mIsShowingUp = true; 2713 super.show(); 2714 } 2715 } 2716 2717 @Override 2718 protected void measureContent() { 2719 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2720 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2721 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2722 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2723 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2724 2725 int width = 0; 2726 View view = null; 2727 for (int i = 0; i < mNumberOfSuggestions; i++) { 2728 view = mSuggestionsAdapter.getView(i, view, mContentView); 2729 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2730 view.measure(horizontalMeasure, verticalMeasure); 2731 width = Math.max(width, view.getMeasuredWidth()); 2732 } 2733 2734 // Enforce the width based on actual text widths 2735 mContentView.measure( 2736 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2737 verticalMeasure); 2738 2739 Drawable popupBackground = mPopupWindow.getBackground(); 2740 if (popupBackground != null) { 2741 if (mTempRect == null) mTempRect = new Rect(); 2742 popupBackground.getPadding(mTempRect); 2743 width += mTempRect.left + mTempRect.right; 2744 } 2745 mPopupWindow.setWidth(width); 2746 } 2747 2748 @Override 2749 protected int getTextOffset() { 2750 return mTextView.getSelectionStart(); 2751 } 2752 2753 @Override 2754 protected int getVerticalLocalPosition(int line) { 2755 return mTextView.getLayout().getLineBottom(line); 2756 } 2757 2758 @Override 2759 protected int clipVertically(int positionY) { 2760 final int height = mContentView.getMeasuredHeight(); 2761 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2762 return Math.min(positionY, displayMetrics.heightPixels - height); 2763 } 2764 2765 @Override 2766 public void hide() { 2767 super.hide(); 2768 } 2769 2770 private boolean updateSuggestions() { 2771 Spannable spannable = (Spannable) mTextView.getText(); 2772 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2773 2774 final int nbSpans = suggestionSpans.length; 2775 // Suggestions are shown after a delay: the underlying spans may have been removed 2776 if (nbSpans == 0) return false; 2777 2778 mNumberOfSuggestions = 0; 2779 int spanUnionStart = mTextView.getText().length(); 2780 int spanUnionEnd = 0; 2781 2782 SuggestionSpan misspelledSpan = null; 2783 int underlineColor = 0; 2784 2785 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2786 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2787 final int spanStart = spannable.getSpanStart(suggestionSpan); 2788 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2789 spanUnionStart = Math.min(spanStart, spanUnionStart); 2790 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2791 2792 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2793 misspelledSpan = suggestionSpan; 2794 } 2795 2796 // The first span dictates the background color of the highlighted text 2797 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2798 2799 String[] suggestions = suggestionSpan.getSuggestions(); 2800 int nbSuggestions = suggestions.length; 2801 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2802 String suggestion = suggestions[suggestionIndex]; 2803 2804 boolean suggestionIsDuplicate = false; 2805 for (int i = 0; i < mNumberOfSuggestions; i++) { 2806 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2807 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2808 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2809 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2810 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2811 suggestionIsDuplicate = true; 2812 break; 2813 } 2814 } 2815 } 2816 2817 if (!suggestionIsDuplicate) { 2818 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2819 suggestionInfo.suggestionSpan = suggestionSpan; 2820 suggestionInfo.suggestionIndex = suggestionIndex; 2821 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2822 2823 mNumberOfSuggestions++; 2824 2825 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2826 // Also end outer for loop 2827 spanIndex = nbSpans; 2828 break; 2829 } 2830 } 2831 } 2832 } 2833 2834 for (int i = 0; i < mNumberOfSuggestions; i++) { 2835 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2836 } 2837 2838 // Add "Add to dictionary" item if there is a span with the misspelled flag 2839 if (misspelledSpan != null) { 2840 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2841 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2842 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2843 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2844 suggestionInfo.suggestionSpan = misspelledSpan; 2845 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2846 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2847 getContext().getString(com.android.internal.R.string.addToDictionary)); 2848 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2849 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2850 2851 mNumberOfSuggestions++; 2852 } 2853 } 2854 2855 // Delete item 2856 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2857 suggestionInfo.suggestionSpan = null; 2858 suggestionInfo.suggestionIndex = DELETE_TEXT; 2859 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2860 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2861 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2862 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2863 mNumberOfSuggestions++; 2864 2865 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2866 if (underlineColor == 0) { 2867 // Fallback on the default highlight color when the first span does not provide one 2868 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2869 } else { 2870 final float BACKGROUND_TRANSPARENCY = 0.4f; 2871 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2872 mSuggestionRangeSpan.setBackgroundColor( 2873 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2874 } 2875 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2876 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2877 2878 mSuggestionsAdapter.notifyDataSetChanged(); 2879 return true; 2880 } 2881 2882 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2883 int unionEnd) { 2884 final Spannable text = (Spannable) mTextView.getText(); 2885 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2886 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2887 2888 // Adjust the start/end of the suggestion span 2889 suggestionInfo.suggestionStart = spanStart - unionStart; 2890 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2891 + suggestionInfo.text.length(); 2892 2893 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2894 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2895 2896 // Add the text before and after the span. 2897 final String textAsString = text.toString(); 2898 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2899 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2900 } 2901 2902 @Override 2903 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2904 Editable editable = (Editable) mTextView.getText(); 2905 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2906 2907 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2908 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2909 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2910 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2911 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2912 if (spanUnionEnd < editable.length() && 2913 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2914 (spanUnionStart == 0 || 2915 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2916 spanUnionEnd = spanUnionEnd + 1; 2917 } 2918 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2919 } 2920 hide(); 2921 return; 2922 } 2923 2924 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2925 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2926 if (spanStart < 0 || spanEnd <= spanStart) { 2927 // Span has been removed 2928 hide(); 2929 return; 2930 } 2931 2932 final String originalText = editable.toString().substring(spanStart, spanEnd); 2933 2934 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2935 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2936 intent.putExtra("word", originalText); 2937 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2938 // Put a listener to replace the original text with a word which the user 2939 // modified in a user dictionary dialog. 2940 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2941 mTextView.getContext().startActivity(intent); 2942 // There is no way to know if the word was indeed added. Re-check. 2943 // TODO The ExtractEditText should remove the span in the original text instead 2944 editable.removeSpan(suggestionInfo.suggestionSpan); 2945 Selection.setSelection(editable, spanEnd); 2946 updateSpellCheckSpans(spanStart, spanEnd, false); 2947 } else { 2948 // SuggestionSpans are removed by replace: save them before 2949 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2950 SuggestionSpan.class); 2951 final int length = suggestionSpans.length; 2952 int[] suggestionSpansStarts = new int[length]; 2953 int[] suggestionSpansEnds = new int[length]; 2954 int[] suggestionSpansFlags = new int[length]; 2955 for (int i = 0; i < length; i++) { 2956 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2957 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2958 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2959 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2960 2961 // Remove potential misspelled flags 2962 int suggestionSpanFlags = suggestionSpan.getFlags(); 2963 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2964 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2965 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2966 suggestionSpan.setFlags(suggestionSpanFlags); 2967 } 2968 } 2969 2970 final int suggestionStart = suggestionInfo.suggestionStart; 2971 final int suggestionEnd = suggestionInfo.suggestionEnd; 2972 final String suggestion = suggestionInfo.text.subSequence( 2973 suggestionStart, suggestionEnd).toString(); 2974 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2975 2976 // Notify source IME of the suggestion pick. Do this before 2977 // swaping texts. 2978 suggestionInfo.suggestionSpan.notifySelection( 2979 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 2980 2981 // Swap text content between actual text and Suggestion span 2982 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 2983 suggestions[suggestionInfo.suggestionIndex] = originalText; 2984 2985 // Restore previous SuggestionSpans 2986 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 2987 for (int i = 0; i < length; i++) { 2988 // Only spans that include the modified region make sense after replacement 2989 // Spans partially included in the replaced region are removed, there is no 2990 // way to assign them a valid range after replacement 2991 if (suggestionSpansStarts[i] <= spanStart && 2992 suggestionSpansEnds[i] >= spanEnd) { 2993 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2994 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 2995 } 2996 } 2997 2998 // Move cursor at the end of the replaced word 2999 final int newCursorPosition = spanEnd + lengthDifference; 3000 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 3001 } 3002 3003 hide(); 3004 } 3005 } 3006 3007 /** 3008 * An ActionMode Callback class that is used to provide actions while in text selection mode. 3009 * 3010 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 3011 * on which of these this TextView supports. 3012 */ 3013 private class SelectionActionModeCallback extends ActionMode.Callback2 { 3014 private final Path mSelectionPath = new Path(); 3015 private final RectF mSelectionBounds = new RectF(); 3016 3017 private int mSelectionHandleHeight; 3018 private int mInsertionHandleHeight; 3019 3020 public SelectionActionModeCallback() { 3021 SelectionModifierCursorController selectionController = getSelectionController(); 3022 if (selectionController.mStartHandle == null) { 3023 selectionController.initDrawables(); 3024 selectionController.initHandles(); 3025 } 3026 mSelectionHandleHeight = Math.max( 3027 mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight()); 3028 InsertionPointCursorController insertionController = getInsertionController(); 3029 if (insertionController != null) { 3030 insertionController.getHandle(); 3031 mInsertionHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3032 } 3033 } 3034 3035 @Override 3036 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3037 mode.setTitle(mTextView.getContext().getString( 3038 com.android.internal.R.string.textSelectionCABTitle)); 3039 mode.setSubtitle(null); 3040 mode.setTitleOptionalHint(true); 3041 populateMenuWithItems(menu); 3042 3043 if (mCustomSelectionActionModeCallback != null) { 3044 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 3045 // The custom mode can choose to cancel the action mode 3046 return false; 3047 } 3048 } 3049 3050 addIntentMenuItemsForTextProcessing(menu); 3051 3052 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3053 mTextView.setHasTransientState(true); 3054 return true; 3055 } else { 3056 return false; 3057 } 3058 } 3059 3060 private void populateMenuWithItems(Menu menu) { 3061 if (mTextView.canCut()) { 3062 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 3063 setAlphabeticShortcut('x'). 3064 setShowAsAction( 3065 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3066 } 3067 3068 if (mTextView.canCopy()) { 3069 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 3070 setAlphabeticShortcut('c'). 3071 setShowAsAction( 3072 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3073 } 3074 3075 if (mTextView.canPaste()) { 3076 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 3077 setAlphabeticShortcut('v'). 3078 setShowAsAction( 3079 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3080 } 3081 3082 if (mTextView.canShare()) { 3083 menu.add(0, TextView.ID_SHARE, 0, com.android.internal.R.string.share). 3084 setShowAsAction( 3085 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3086 } 3087 3088 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 3089 setAlphabeticShortcut('a'). 3090 setShowAsAction( 3091 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3092 3093 updateReplaceItem(menu); 3094 } 3095 3096 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3097 if (mTextView.canProcessText()) { 3098 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3099 List<ResolveInfo> supportedActivities = 3100 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3101 for (ResolveInfo info : supportedActivities) { 3102 menu.add(info.loadLabel(packageManager)) 3103 .setIntent(createProcessTextIntentForResolveInfo(info)) 3104 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM 3105 | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3106 } 3107 } 3108 } 3109 3110 private Intent createProcessTextIntent() { 3111 return new Intent() 3112 .setAction(Intent.ACTION_PROCESS_TEXT) 3113 .setType("text/plain"); 3114 } 3115 3116 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3117 return createProcessTextIntent() 3118 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3119 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3120 } 3121 3122 @Override 3123 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3124 updateReplaceItem(menu); 3125 3126 if (mCustomSelectionActionModeCallback != null) { 3127 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3128 } 3129 return true; 3130 } 3131 3132 private void updateReplaceItem(Menu menu) { 3133 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3134 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3135 if (canReplace && !replaceItemExists) { 3136 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 3137 setShowAsAction( 3138 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3139 } else if (!canReplace && replaceItemExists) { 3140 menu.removeItem(TextView.ID_REPLACE); 3141 } 3142 } 3143 3144 @Override 3145 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3146 if (item.getIntent() != null 3147 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3148 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3149 mPreserveDetachedSelection = true; 3150 mTextView.startActivityForResult( 3151 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3152 return true; 3153 } 3154 if (mCustomSelectionActionModeCallback != null && 3155 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3156 return true; 3157 } 3158 if (item.getItemId() == TextView.ID_REPLACE) { 3159 onReplace(); 3160 return true; 3161 } 3162 return mTextView.onTextContextMenuItem(item.getItemId()); 3163 } 3164 3165 @Override 3166 public void onDestroyActionMode(ActionMode mode) { 3167 if (mCustomSelectionActionModeCallback != null) { 3168 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3169 } 3170 3171 /* 3172 * If we're ending this mode because we're detaching from a window, 3173 * we still have selection state to preserve. Don't clear it, we'll 3174 * bring back the selection mode when (if) we get reattached. 3175 */ 3176 if (!mPreserveDetachedSelection) { 3177 Selection.setSelection((Spannable) mTextView.getText(), 3178 mTextView.getSelectionEnd()); 3179 mTextView.setHasTransientState(false); 3180 } 3181 3182 if (mSelectionModifierCursorController != null) { 3183 mSelectionModifierCursorController.hide(); 3184 } 3185 3186 mSelectionActionMode = null; 3187 } 3188 3189 @Override 3190 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3191 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3192 super.onGetContentRect(mode, view, outRect); 3193 return; 3194 } 3195 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3196 // We have a selection. 3197 mSelectionPath.reset(); 3198 mTextView.getLayout().getSelectionPath( 3199 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3200 mSelectionPath.computeBounds(mSelectionBounds, true); 3201 mSelectionBounds.bottom += mSelectionHandleHeight; 3202 } else if (mCursorCount == 2) { 3203 // We have a split cursor. In this case, we take the rectangle that includes both 3204 // parts of the cursor to ensure we don't obscure either of them. 3205 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3206 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3207 mSelectionBounds.set( 3208 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3209 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3210 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3211 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3212 + mInsertionHandleHeight); 3213 } else { 3214 // We have a single cursor. 3215 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3216 float primaryHorizontal = 3217 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3218 mSelectionBounds.set( 3219 primaryHorizontal, 3220 mTextView.getLayout().getLineTop(line), 3221 primaryHorizontal + 1, 3222 mTextView.getLayout().getLineTop(line + 1) + mInsertionHandleHeight); 3223 } 3224 // Take TextView's padding and scroll into account. 3225 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3226 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3227 outRect.set( 3228 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3229 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3230 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3231 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3232 } 3233 } 3234 3235 private void onReplace() { 3236 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3237 stopSelectionActionMode(); 3238 Selection.setSelection((Spannable) mTextView.getText(), middle); 3239 showSuggestions(); 3240 } 3241 3242 /** 3243 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3244 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3245 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3246 */ 3247 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3248 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3249 final int[] mTmpIntOffset = new int[2]; 3250 final Matrix mViewToScreenMatrix = new Matrix(); 3251 3252 @Override 3253 public void updatePosition(int parentPositionX, int parentPositionY, 3254 boolean parentPositionChanged, boolean parentScrolled) { 3255 final InputMethodState ims = mInputMethodState; 3256 if (ims == null || ims.mBatchEditNesting > 0) { 3257 return; 3258 } 3259 final InputMethodManager imm = InputMethodManager.peekInstance(); 3260 if (null == imm) { 3261 return; 3262 } 3263 if (!imm.isActive(mTextView)) { 3264 return; 3265 } 3266 // Skip if the IME has not requested the cursor/anchor position. 3267 if (!imm.isCursorAnchorInfoEnabled()) { 3268 return; 3269 } 3270 Layout layout = mTextView.getLayout(); 3271 if (layout == null) { 3272 return; 3273 } 3274 3275 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3276 builder.reset(); 3277 3278 final int selectionStart = mTextView.getSelectionStart(); 3279 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3280 3281 // Construct transformation matrix from view local coordinates to screen coordinates. 3282 mViewToScreenMatrix.set(mTextView.getMatrix()); 3283 mTextView.getLocationOnScreen(mTmpIntOffset); 3284 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3285 builder.setMatrix(mViewToScreenMatrix); 3286 3287 final float viewportToContentHorizontalOffset = 3288 mTextView.viewportToContentHorizontalOffset(); 3289 final float viewportToContentVerticalOffset = 3290 mTextView.viewportToContentVerticalOffset(); 3291 3292 final CharSequence text = mTextView.getText(); 3293 if (text instanceof Spannable) { 3294 final Spannable sp = (Spannable) text; 3295 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3296 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3297 if (composingTextEnd < composingTextStart) { 3298 final int temp = composingTextEnd; 3299 composingTextEnd = composingTextStart; 3300 composingTextStart = temp; 3301 } 3302 final boolean hasComposingText = 3303 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3304 if (hasComposingText) { 3305 final CharSequence composingText = text.subSequence(composingTextStart, 3306 composingTextEnd); 3307 builder.setComposingText(composingTextStart, composingText); 3308 3309 final int minLine = layout.getLineForOffset(composingTextStart); 3310 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3311 for (int line = minLine; line <= maxLine; ++line) { 3312 final int lineStart = layout.getLineStart(line); 3313 final int lineEnd = layout.getLineEnd(line); 3314 final int offsetStart = Math.max(lineStart, composingTextStart); 3315 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3316 final boolean ltrLine = 3317 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3318 final float[] widths = new float[offsetEnd - offsetStart]; 3319 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3320 final float top = layout.getLineTop(line); 3321 final float bottom = layout.getLineBottom(line); 3322 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3323 final float charWidth = widths[offset - offsetStart]; 3324 final boolean isRtl = layout.isRtlCharAt(offset); 3325 final float primary = layout.getPrimaryHorizontal(offset); 3326 final float secondary = layout.getSecondaryHorizontal(offset); 3327 // TODO: This doesn't work perfectly for text with custom styles and 3328 // TAB chars. 3329 final float left; 3330 final float right; 3331 if (ltrLine) { 3332 if (isRtl) { 3333 left = secondary - charWidth; 3334 right = secondary; 3335 } else { 3336 left = primary; 3337 right = primary + charWidth; 3338 } 3339 } else { 3340 if (!isRtl) { 3341 left = secondary; 3342 right = secondary + charWidth; 3343 } else { 3344 left = primary - charWidth; 3345 right = primary; 3346 } 3347 } 3348 // TODO: Check top-right and bottom-left as well. 3349 final float localLeft = left + viewportToContentHorizontalOffset; 3350 final float localRight = right + viewportToContentHorizontalOffset; 3351 final float localTop = top + viewportToContentVerticalOffset; 3352 final float localBottom = bottom + viewportToContentVerticalOffset; 3353 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3354 final boolean isBottomRightVisible = 3355 isPositionVisible(localRight, localBottom); 3356 int characterBoundsFlags = 0; 3357 if (isTopLeftVisible || isBottomRightVisible) { 3358 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3359 } 3360 if (!isTopLeftVisible || !isBottomRightVisible) { 3361 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3362 } 3363 if (isRtl) { 3364 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3365 } 3366 // Here offset is the index in Java chars. 3367 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3368 localBottom, characterBoundsFlags); 3369 } 3370 } 3371 } 3372 } 3373 3374 // Treat selectionStart as the insertion point. 3375 if (0 <= selectionStart) { 3376 final int offset = selectionStart; 3377 final int line = layout.getLineForOffset(offset); 3378 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3379 + viewportToContentHorizontalOffset; 3380 final float insertionMarkerTop = layout.getLineTop(line) 3381 + viewportToContentVerticalOffset; 3382 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3383 + viewportToContentVerticalOffset; 3384 final float insertionMarkerBottom = layout.getLineBottom(line) 3385 + viewportToContentVerticalOffset; 3386 final boolean isTopVisible = 3387 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3388 final boolean isBottomVisible = 3389 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3390 int insertionMarkerFlags = 0; 3391 if (isTopVisible || isBottomVisible) { 3392 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3393 } 3394 if (!isTopVisible || !isBottomVisible) { 3395 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3396 } 3397 if (layout.isRtlCharAt(offset)) { 3398 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3399 } 3400 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3401 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3402 } 3403 3404 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3405 } 3406 } 3407 3408 private abstract class HandleView extends View implements TextViewPositionListener { 3409 protected Drawable mDrawable; 3410 protected Drawable mDrawableLtr; 3411 protected Drawable mDrawableRtl; 3412 private final PopupWindow mContainer; 3413 // Position with respect to the parent TextView 3414 private int mPositionX, mPositionY; 3415 private boolean mIsDragging; 3416 // Offset from touch position to mPosition 3417 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3418 protected int mHotspotX; 3419 protected int mHorizontalGravity; 3420 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3421 private float mTouchOffsetY; 3422 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3423 private float mIdealVerticalOffset; 3424 // Parent's (TextView) previous position in window 3425 private int mLastParentX, mLastParentY; 3426 // Previous text character offset 3427 protected int mPreviousOffset = -1; 3428 // Previous text character offset 3429 private boolean mPositionHasChanged = true; 3430 // Minimum touch target size for handles 3431 private int mMinSize; 3432 // Indicates the line of text that the handle is on. 3433 protected int mPrevLine = -1; 3434 3435 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3436 super(mTextView.getContext()); 3437 mContainer = new PopupWindow(mTextView.getContext(), null, 3438 com.android.internal.R.attr.textSelectHandleWindowStyle); 3439 mContainer.setSplitTouchEnabled(true); 3440 mContainer.setClippingEnabled(false); 3441 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3442 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3443 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3444 mContainer.setContentView(this); 3445 3446 mDrawableLtr = drawableLtr; 3447 mDrawableRtl = drawableRtl; 3448 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3449 com.android.internal.R.dimen.text_handle_min_size); 3450 3451 updateDrawable(); 3452 3453 final int handleHeight = getPreferredHeight(); 3454 mTouchOffsetY = -0.3f * handleHeight; 3455 mIdealVerticalOffset = 0.7f * handleHeight; 3456 } 3457 3458 protected void updateDrawable() { 3459 final int offset = getCurrentCursorOffset(); 3460 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3461 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3462 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3463 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3464 } 3465 3466 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3467 protected abstract int getHorizontalGravity(boolean isRtlRun); 3468 3469 // Touch-up filter: number of previous positions remembered 3470 private static final int HISTORY_SIZE = 5; 3471 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3472 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3473 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3474 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3475 private int mPreviousOffsetIndex = 0; 3476 private int mNumberPreviousOffsets = 0; 3477 3478 private void startTouchUpFilter(int offset) { 3479 mNumberPreviousOffsets = 0; 3480 addPositionToTouchUpFilter(offset); 3481 } 3482 3483 private void addPositionToTouchUpFilter(int offset) { 3484 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3485 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3486 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3487 mNumberPreviousOffsets++; 3488 } 3489 3490 private void filterOnTouchUp() { 3491 final long now = SystemClock.uptimeMillis(); 3492 int i = 0; 3493 int index = mPreviousOffsetIndex; 3494 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3495 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3496 i++; 3497 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3498 } 3499 3500 if (i > 0 && i < iMax && 3501 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3502 positionAtCursorOffset(mPreviousOffsets[index], false); 3503 } 3504 } 3505 3506 public boolean offsetHasBeenChanged() { 3507 return mNumberPreviousOffsets > 1; 3508 } 3509 3510 @Override 3511 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3512 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3513 } 3514 3515 private int getPreferredWidth() { 3516 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3517 } 3518 3519 private int getPreferredHeight() { 3520 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3521 } 3522 3523 public void show() { 3524 if (isShowing()) return; 3525 3526 getPositionListener().addSubscriber(this, true /* local position may change */); 3527 3528 // Make sure the offset is always considered new, even when focusing at same position 3529 mPreviousOffset = -1; 3530 positionAtCursorOffset(getCurrentCursorOffset(), false); 3531 } 3532 3533 protected void dismiss() { 3534 mIsDragging = false; 3535 mContainer.dismiss(); 3536 onDetached(); 3537 } 3538 3539 public void hide() { 3540 dismiss(); 3541 3542 getPositionListener().removeSubscriber(this); 3543 } 3544 3545 public boolean isShowing() { 3546 return mContainer.isShowing(); 3547 } 3548 3549 private boolean isVisible() { 3550 // Always show a dragging handle. 3551 if (mIsDragging) { 3552 return true; 3553 } 3554 3555 if (mTextView.isInBatchEditMode()) { 3556 return false; 3557 } 3558 3559 return isPositionVisible(mPositionX + mHotspotX, mPositionY); 3560 } 3561 3562 public abstract int getCurrentCursorOffset(); 3563 3564 protected abstract void updateSelection(int offset); 3565 3566 public abstract void updatePosition(float x, float y); 3567 3568 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3569 // A HandleView relies on the layout, which may be nulled by external methods 3570 Layout layout = mTextView.getLayout(); 3571 if (layout == null) { 3572 // Will update controllers' state, hiding them and stopping selection mode if needed 3573 prepareCursorControllers(); 3574 return; 3575 } 3576 3577 boolean offsetChanged = offset != mPreviousOffset; 3578 if (offsetChanged || parentScrolled) { 3579 if (offsetChanged) { 3580 updateSelection(offset); 3581 addPositionToTouchUpFilter(offset); 3582 } 3583 final int line = layout.getLineForOffset(offset); 3584 mPrevLine = line; 3585 3586 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3587 getHorizontalOffset() + getCursorOffset()); 3588 mPositionY = layout.getLineBottom(line); 3589 3590 // Take TextView's padding and scroll into account. 3591 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3592 mPositionY += mTextView.viewportToContentVerticalOffset(); 3593 3594 mPreviousOffset = offset; 3595 mPositionHasChanged = true; 3596 } 3597 } 3598 3599 public void updatePosition(int parentPositionX, int parentPositionY, 3600 boolean parentPositionChanged, boolean parentScrolled) { 3601 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3602 if (parentPositionChanged || mPositionHasChanged) { 3603 if (mIsDragging) { 3604 // Update touchToWindow offset in case of parent scrolling while dragging 3605 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3606 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3607 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3608 mLastParentX = parentPositionX; 3609 mLastParentY = parentPositionY; 3610 } 3611 3612 onHandleMoved(); 3613 } 3614 3615 if (isVisible()) { 3616 final int positionX = parentPositionX + mPositionX; 3617 final int positionY = parentPositionY + mPositionY; 3618 if (isShowing()) { 3619 mContainer.update(positionX, positionY, -1, -1); 3620 } else { 3621 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3622 positionX, positionY); 3623 } 3624 } else { 3625 if (isShowing()) { 3626 dismiss(); 3627 } 3628 } 3629 3630 mPositionHasChanged = false; 3631 } 3632 } 3633 3634 public void showAtLocation(int offset) { 3635 // TODO - investigate if there's a better way to show the handles 3636 // after the drag accelerator has occured. 3637 int[] tmpCords = new int[2]; 3638 mTextView.getLocationInWindow(tmpCords); 3639 3640 Layout layout = mTextView.getLayout(); 3641 int posX = tmpCords[0]; 3642 int posY = tmpCords[1]; 3643 3644 final int line = layout.getLineForOffset(offset); 3645 3646 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3647 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3648 int startY = layout.getLineBottom(line); 3649 3650 // Take TextView's padding and scroll into account. 3651 startX += mTextView.viewportToContentHorizontalOffset(); 3652 startY += mTextView.viewportToContentVerticalOffset(); 3653 3654 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3655 startX + posX, startY + posY); 3656 } 3657 3658 @Override 3659 protected void onDraw(Canvas c) { 3660 final int drawWidth = mDrawable.getIntrinsicWidth(); 3661 final int left = getHorizontalOffset(); 3662 3663 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3664 mDrawable.draw(c); 3665 } 3666 3667 private int getHorizontalOffset() { 3668 final int width = getPreferredWidth(); 3669 final int drawWidth = mDrawable.getIntrinsicWidth(); 3670 final int left; 3671 switch (mHorizontalGravity) { 3672 case Gravity.LEFT: 3673 left = 0; 3674 break; 3675 default: 3676 case Gravity.CENTER: 3677 left = (width - drawWidth) / 2; 3678 break; 3679 case Gravity.RIGHT: 3680 left = width - drawWidth; 3681 break; 3682 } 3683 return left; 3684 } 3685 3686 protected int getCursorOffset() { 3687 return 0; 3688 } 3689 3690 @Override 3691 public boolean onTouchEvent(MotionEvent ev) { 3692 switch (ev.getActionMasked()) { 3693 case MotionEvent.ACTION_DOWN: { 3694 startTouchUpFilter(getCurrentCursorOffset()); 3695 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3696 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3697 3698 final PositionListener positionListener = getPositionListener(); 3699 mLastParentX = positionListener.getPositionX(); 3700 mLastParentY = positionListener.getPositionY(); 3701 mIsDragging = true; 3702 break; 3703 } 3704 3705 case MotionEvent.ACTION_MOVE: { 3706 final float rawX = ev.getRawX(); 3707 final float rawY = ev.getRawY(); 3708 3709 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3710 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3711 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3712 float newVerticalOffset; 3713 if (previousVerticalOffset < mIdealVerticalOffset) { 3714 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3715 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3716 } else { 3717 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3718 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3719 } 3720 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3721 3722 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3723 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3724 3725 updatePosition(newPosX, newPosY); 3726 break; 3727 } 3728 3729 case MotionEvent.ACTION_UP: 3730 filterOnTouchUp(); 3731 mIsDragging = false; 3732 break; 3733 3734 case MotionEvent.ACTION_CANCEL: 3735 mIsDragging = false; 3736 break; 3737 } 3738 return true; 3739 } 3740 3741 public boolean isDragging() { 3742 return mIsDragging; 3743 } 3744 3745 void onHandleMoved() {} 3746 3747 public void onDetached() {} 3748 } 3749 3750 private class InsertionHandleView extends HandleView { 3751 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3752 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3753 3754 // Used to detect taps on the insertion handle, which will affect the selection action mode 3755 private float mDownPositionX, mDownPositionY; 3756 private Runnable mHider; 3757 3758 public InsertionHandleView(Drawable drawable) { 3759 super(drawable, drawable); 3760 } 3761 3762 @Override 3763 public void show() { 3764 super.show(); 3765 3766 final long durationSinceCutOrCopy = 3767 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3768 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3769 startSelectionActionModeWithoutSelection(); 3770 } 3771 3772 hideAfterDelay(); 3773 } 3774 3775 private void hideAfterDelay() { 3776 if (mHider == null) { 3777 mHider = new Runnable() { 3778 public void run() { 3779 hide(); 3780 } 3781 }; 3782 } else { 3783 removeHiderCallback(); 3784 } 3785 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3786 } 3787 3788 private void removeHiderCallback() { 3789 if (mHider != null) { 3790 mTextView.removeCallbacks(mHider); 3791 } 3792 } 3793 3794 @Override 3795 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3796 return drawable.getIntrinsicWidth() / 2; 3797 } 3798 3799 @Override 3800 protected int getHorizontalGravity(boolean isRtlRun) { 3801 return Gravity.CENTER_HORIZONTAL; 3802 } 3803 3804 @Override 3805 protected int getCursorOffset() { 3806 int offset = super.getCursorOffset(); 3807 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3808 if (cursor != null) { 3809 cursor.getPadding(mTempRect); 3810 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3811 } 3812 return offset; 3813 } 3814 3815 @Override 3816 public boolean onTouchEvent(MotionEvent ev) { 3817 final boolean result = super.onTouchEvent(ev); 3818 3819 switch (ev.getActionMasked()) { 3820 case MotionEvent.ACTION_DOWN: 3821 mDownPositionX = ev.getRawX(); 3822 mDownPositionY = ev.getRawY(); 3823 break; 3824 3825 case MotionEvent.ACTION_UP: 3826 if (!offsetHasBeenChanged()) { 3827 final float deltaX = mDownPositionX - ev.getRawX(); 3828 final float deltaY = mDownPositionY - ev.getRawY(); 3829 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3830 3831 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3832 mTextView.getContext()); 3833 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3834 3835 if (distanceSquared < touchSlop * touchSlop) { 3836 // Tapping on the handle toggles the selection action mode. 3837 if (mSelectionActionMode != null) { 3838 mSelectionActionMode.finish(); 3839 } else { 3840 startSelectionActionModeWithoutSelection(); 3841 } 3842 } 3843 } 3844 hideAfterDelay(); 3845 break; 3846 3847 case MotionEvent.ACTION_CANCEL: 3848 hideAfterDelay(); 3849 break; 3850 3851 default: 3852 break; 3853 } 3854 3855 return result; 3856 } 3857 3858 @Override 3859 public int getCurrentCursorOffset() { 3860 return mTextView.getSelectionStart(); 3861 } 3862 3863 @Override 3864 public void updateSelection(int offset) { 3865 Selection.setSelection((Spannable) mTextView.getText(), offset); 3866 } 3867 3868 @Override 3869 public void updatePosition(float x, float y) { 3870 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3871 } 3872 3873 @Override 3874 void onHandleMoved() { 3875 super.onHandleMoved(); 3876 removeHiderCallback(); 3877 } 3878 3879 @Override 3880 public void onDetached() { 3881 super.onDetached(); 3882 removeHiderCallback(); 3883 } 3884 } 3885 3886 private class SelectionStartHandleView extends HandleView { 3887 // Indicates whether the cursor is making adjustments within a word. 3888 private boolean mInWord = false; 3889 // Offset to track difference between touch and word boundary. 3890 protected int mTouchWordOffset; 3891 3892 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3893 super(drawableLtr, drawableRtl); 3894 } 3895 3896 @Override 3897 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3898 return isRtlRun ? 0 : drawable.getIntrinsicWidth(); 3899 } 3900 3901 @Override 3902 protected int getHorizontalGravity(boolean isRtlRun) { 3903 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 3904 } 3905 3906 @Override 3907 public int getCurrentCursorOffset() { 3908 return mTextView.getSelectionStart(); 3909 } 3910 3911 @Override 3912 public void updateSelection(int offset) { 3913 Selection.setSelection((Spannable) mTextView.getText(), offset, 3914 mTextView.getSelectionEnd()); 3915 updateDrawable(); 3916 if (mSelectionActionMode != null) { 3917 mSelectionActionMode.invalidate(); 3918 } 3919 } 3920 3921 @Override 3922 public void updatePosition(float x, float y) { 3923 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3924 final int currLine = mTextView.getLineAtCoordinate(y); 3925 3926 // Don't select white space on different lines. 3927 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 3928 3929 boolean positionCursor = false; 3930 int offset = trueOffset; 3931 int end = getWordEnd(offset, true); 3932 int start = getWordStart(offset); 3933 3934 if (offset < mPreviousOffset) { 3935 // User is increasing the selection. 3936 if (!mInWord || currLine < mPrevLine) { 3937 // We're not in a word, or we're on a different line so we'll expand by 3938 // word. First ensure the user has at least entered the next word. 3939 int offsetToWord = Math.min((end - start) / 2, 2); 3940 if (offset <= end - offsetToWord || currLine < mPrevLine) { 3941 offset = start; 3942 } else { 3943 offset = mPreviousOffset; 3944 } 3945 } 3946 mTouchWordOffset = Math.max(trueOffset - offset, 0); 3947 mInWord = !isStartBoundary(offset); 3948 positionCursor = true; 3949 } else if (offset - mTouchWordOffset > mPreviousOffset) { 3950 // User is shrinking the selection. 3951 if (currLine > mPrevLine) { 3952 // We're on a different line, so we'll snap to word boundaries. 3953 offset = end; 3954 } 3955 offset -= mTouchWordOffset; 3956 mInWord = !isEndBoundary(offset); 3957 positionCursor = true; 3958 } 3959 3960 // Handles can not cross and selection is at least one character. 3961 if (positionCursor) { 3962 final int selectionEnd = mTextView.getSelectionEnd(); 3963 if (offset >= selectionEnd) { 3964 // We can't cross the handles so let's just constrain the Y value. 3965 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 3966 if (alteredOffset >= selectionEnd) { 3967 // Can't pass the other drag handle. 3968 offset = Math.max(0, selectionEnd - 1); 3969 } else { 3970 offset = alteredOffset; 3971 } 3972 } 3973 positionAtCursorOffset(offset, false); 3974 } 3975 } 3976 3977 @Override 3978 public boolean onTouchEvent(MotionEvent event) { 3979 boolean superResult = super.onTouchEvent(event); 3980 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 3981 // Reset the touch word offset when the user has lifted their finger. 3982 mTouchWordOffset = 0; 3983 } 3984 return superResult; 3985 } 3986 } 3987 3988 private class SelectionEndHandleView extends HandleView { 3989 // Indicates whether the cursor is making adjustments within a word. 3990 private boolean mInWord = false; 3991 // Offset to track difference between touch and word boundary. 3992 protected int mTouchWordOffset; 3993 3994 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3995 super(drawableLtr, drawableRtl); 3996 } 3997 3998 @Override 3999 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4000 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 4001 } 4002 4003 @Override 4004 protected int getHorizontalGravity(boolean isRtlRun) { 4005 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 4006 } 4007 4008 @Override 4009 public int getCurrentCursorOffset() { 4010 return mTextView.getSelectionEnd(); 4011 } 4012 4013 @Override 4014 public void updateSelection(int offset) { 4015 Selection.setSelection((Spannable) mTextView.getText(), 4016 mTextView.getSelectionStart(), offset); 4017 if (mSelectionActionMode != null) { 4018 mSelectionActionMode.invalidate(); 4019 } 4020 updateDrawable(); 4021 } 4022 4023 @Override 4024 public void updatePosition(float x, float y) { 4025 final int trueOffset = mTextView.getOffsetForPosition(x, y); 4026 final int currLine = mTextView.getLineAtCoordinate(y); 4027 4028 // Don't select white space on different lines. 4029 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 4030 4031 int offset = trueOffset; 4032 boolean positionCursor = false; 4033 4034 int end = getWordEnd(offset, true); 4035 int start = getWordStart(offset); 4036 4037 if (offset > mPreviousOffset) { 4038 // User is increasing the selection. 4039 if (!mInWord || currLine > mPrevLine) { 4040 // We're not in a word, or we're on a different line so we'll expand by 4041 // word. First ensure the user has at least entered the next word. 4042 int midPoint = Math.min((end - start) / 2, 2); 4043 if (offset >= start + midPoint || currLine > mPrevLine) { 4044 offset = end; 4045 } else { 4046 offset = mPreviousOffset; 4047 } 4048 } 4049 mTouchWordOffset = Math.max(offset - trueOffset, 0); 4050 mInWord = !isEndBoundary(offset); 4051 positionCursor = true; 4052 } else if (offset + mTouchWordOffset < mPreviousOffset) { 4053 // User is shrinking the selection. 4054 if (currLine < mPrevLine) { 4055 // We're on a different line, so we'll snap to word boundaries. 4056 offset = start; 4057 } 4058 offset += mTouchWordOffset; 4059 positionCursor = true; 4060 mInWord = !isStartBoundary(offset); 4061 } 4062 4063 if (positionCursor) { 4064 final int selectionStart = mTextView.getSelectionStart(); 4065 if (offset <= selectionStart) { 4066 // We can't cross the handles so let's just constrain the Y value. 4067 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 4068 int length = mTextView.getText().length(); 4069 if (alteredOffset <= selectionStart) { 4070 // Can't pass the other drag handle. 4071 offset = Math.min(selectionStart + 1, length); 4072 } else { 4073 offset = Math.min(alteredOffset, length); 4074 } 4075 } 4076 positionAtCursorOffset(offset, false); 4077 } 4078 } 4079 4080 @Override 4081 public boolean onTouchEvent(MotionEvent event) { 4082 boolean superResult = super.onTouchEvent(event); 4083 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4084 // Reset the touch word offset when the user has lifted their finger. 4085 mTouchWordOffset = 0; 4086 } 4087 return superResult; 4088 } 4089 } 4090 4091 /** 4092 * Checks whether selection is happening on a different line than previous and 4093 * if that line only contains whitespace up to the touch location. 4094 * 4095 * @param prevLine The previous line the selection was on. 4096 * @param currLine The current line being selected. 4097 * @param offset The offset in the text where the touch occurred. 4098 * @return Whether or not it was just a white space line being selected. 4099 */ 4100 private boolean isWhitespaceLine(int prevLine, int currLine, int offset) { 4101 if (prevLine == currLine) { 4102 // Same line; don't care. 4103 return false; 4104 } 4105 CharSequence text = mTextView.getText(); 4106 if (offset == text.length()) { 4107 // No character at the last position. 4108 return false; 4109 } 4110 int lineEndOffset = mTextView.getLayout().getLineEnd(currLine); 4111 for (int cp, i = offset; i < lineEndOffset; i += Character.charCount(cp)) { 4112 cp = Character.codePointAt(text, i); 4113 if (!Character.isSpaceChar(cp) && !Character.isWhitespace(cp)) { 4114 // There are non white space chars on the line. 4115 return false; 4116 } 4117 } 4118 return true; 4119 } 4120 4121 /** 4122 * A CursorController instance can be used to control a cursor in the text. 4123 */ 4124 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4125 /** 4126 * Makes the cursor controller visible on screen. 4127 * See also {@link #hide()}. 4128 */ 4129 public void show(); 4130 4131 /** 4132 * Hide the cursor controller from screen. 4133 * See also {@link #show()}. 4134 */ 4135 public void hide(); 4136 4137 /** 4138 * Called when the view is detached from window. Perform house keeping task, such as 4139 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4140 * preventing the activity from being recycled. 4141 */ 4142 public void onDetached(); 4143 } 4144 4145 private class InsertionPointCursorController implements CursorController { 4146 private InsertionHandleView mHandle; 4147 4148 public void show() { 4149 getHandle().show(); 4150 } 4151 4152 public void hide() { 4153 if (mHandle != null) { 4154 mHandle.hide(); 4155 } 4156 } 4157 4158 public void onTouchModeChanged(boolean isInTouchMode) { 4159 if (!isInTouchMode) { 4160 hide(); 4161 } 4162 } 4163 4164 private InsertionHandleView getHandle() { 4165 if (mSelectHandleCenter == null) { 4166 mSelectHandleCenter = mTextView.getContext().getDrawable( 4167 mTextView.mTextSelectHandleRes); 4168 } 4169 if (mHandle == null) { 4170 mHandle = new InsertionHandleView(mSelectHandleCenter); 4171 } 4172 return mHandle; 4173 } 4174 4175 @Override 4176 public void onDetached() { 4177 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4178 observer.removeOnTouchModeChangeListener(this); 4179 4180 if (mHandle != null) mHandle.onDetached(); 4181 } 4182 } 4183 4184 class SelectionModifierCursorController implements CursorController { 4185 // The cursor controller handles, lazily created when shown. 4186 private SelectionStartHandleView mStartHandle; 4187 private SelectionEndHandleView mEndHandle; 4188 // The offsets of that last touch down event. Remembered to start selection there. 4189 private int mMinTouchOffset, mMaxTouchOffset; 4190 4191 // Double tap detection 4192 private long mPreviousTapUpTime = 0; 4193 private float mDownPositionX, mDownPositionY; 4194 private boolean mGestureStayedInTapRegion; 4195 4196 // Where the user first starts the drag motion. 4197 private int mStartOffset = -1; 4198 // Indicates whether the user is selecting text and using the drag accelerator. 4199 private boolean mDragAcceleratorActive; 4200 // Indicates the line of text the drag accelerator is on. 4201 private int mPrevLine = -1; 4202 4203 SelectionModifierCursorController() { 4204 resetTouchOffsets(); 4205 } 4206 4207 public void show() { 4208 if (mTextView.isInBatchEditMode()) { 4209 return; 4210 } 4211 initDrawables(); 4212 initHandles(); 4213 hideInsertionPointCursorController(); 4214 } 4215 4216 private void initDrawables() { 4217 if (mSelectHandleLeft == null) { 4218 mSelectHandleLeft = mTextView.getContext().getDrawable( 4219 mTextView.mTextSelectHandleLeftRes); 4220 } 4221 if (mSelectHandleRight == null) { 4222 mSelectHandleRight = mTextView.getContext().getDrawable( 4223 mTextView.mTextSelectHandleRightRes); 4224 } 4225 } 4226 4227 private void initHandles() { 4228 // Lazy object creation has to be done before updatePosition() is called. 4229 if (mStartHandle == null) { 4230 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4231 } 4232 if (mEndHandle == null) { 4233 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4234 } 4235 4236 mStartHandle.show(); 4237 mEndHandle.show(); 4238 4239 hideInsertionPointCursorController(); 4240 } 4241 4242 public void hide() { 4243 if (mStartHandle != null) mStartHandle.hide(); 4244 if (mEndHandle != null) mEndHandle.hide(); 4245 } 4246 4247 public void enterDrag() { 4248 // Just need to init the handles / hide insertion cursor. 4249 show(); 4250 mDragAcceleratorActive = true; 4251 // Start location of selection. 4252 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4253 mLastDownPositionY); 4254 // Don't show the handles until user has lifted finger. 4255 hide(); 4256 4257 // This stops scrolling parents from intercepting the touch event, allowing 4258 // the user to continue dragging across the screen to select text; TextView will 4259 // scroll as necessary. 4260 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4261 } 4262 4263 public void onTouchEvent(MotionEvent event) { 4264 // This is done even when the View does not have focus, so that long presses can start 4265 // selection and tap can move cursor from this tap position. 4266 switch (event.getActionMasked()) { 4267 case MotionEvent.ACTION_DOWN: 4268 final float x = event.getX(); 4269 final float y = event.getY(); 4270 4271 // Remember finger down position, to be able to start selection from there. 4272 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4273 4274 // Double tap detection 4275 if (mGestureStayedInTapRegion) { 4276 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 4277 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 4278 final float deltaX = x - mDownPositionX; 4279 final float deltaY = y - mDownPositionY; 4280 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4281 4282 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4283 mTextView.getContext()); 4284 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4285 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4286 4287 if (stayedInArea && isPositionOnText(x, y)) { 4288 startSelectionActionModeWithSelectionAndStartDrag(); 4289 mDiscardNextActionUp = true; 4290 } 4291 } 4292 } 4293 4294 // New selection, reset line. 4295 mPrevLine = mTextView.getLineAtCoordinate(y); 4296 mDownPositionX = x; 4297 mDownPositionY = y; 4298 mGestureStayedInTapRegion = true; 4299 break; 4300 4301 case MotionEvent.ACTION_POINTER_DOWN: 4302 case MotionEvent.ACTION_POINTER_UP: 4303 // Handle multi-point gestures. Keep min and max offset positions. 4304 // Only activated for devices that correctly handle multi-touch. 4305 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4306 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4307 updateMinAndMaxOffsets(event); 4308 } 4309 break; 4310 4311 case MotionEvent.ACTION_MOVE: 4312 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4313 mTextView.getContext()); 4314 4315 if (mGestureStayedInTapRegion) { 4316 final float deltaX = event.getX() - mDownPositionX; 4317 final float deltaY = event.getY() - mDownPositionY; 4318 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4319 4320 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4321 4322 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4323 mGestureStayedInTapRegion = false; 4324 } 4325 } 4326 4327 if (mStartHandle != null && mStartHandle.isShowing()) { 4328 // Don't do the drag if the handles are showing already. 4329 break; 4330 } 4331 4332 if (mStartOffset != -1) { 4333 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4334 event.getY()); 4335 int offset = rawOffset; 4336 4337 // We don't start "dragging" until the user is past the initial word that 4338 // gets selected on long press. 4339 int firstWordStart = getWordStart(mStartOffset); 4340 int firstWordEnd = getWordEnd(mStartOffset, false); 4341 if (offset > firstWordEnd || offset < firstWordStart) { 4342 4343 // Basically the goal in the below code is to have the highlight be 4344 // offset so that your finger isn't covering the end point. 4345 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4346 float mx = event.getX(); 4347 float my = event.getY(); 4348 if (mx > fingerOffset) mx -= fingerOffset; 4349 if (my > fingerOffset) my -= fingerOffset; 4350 offset = mTextView.getOffsetForPosition(mx, my); 4351 4352 int currLine = mTextView.getLineAtCoordinate(my); 4353 4354 // Don't select white space on different lines. 4355 if (isWhitespaceLine(mPrevLine, currLine, offset)) return; 4356 4357 mPrevLine = currLine; 4358 4359 // Perform the check for closeness at edge of view, if we're very close 4360 // don't adjust the offset to be in front of the finger - otherwise the 4361 // user can't select words at the edge. 4362 if (mTextView.getWidth() - fingerOffset > mx) { 4363 // We're going by word, so we need to make sure that the offset 4364 // that we get is within this, so we'll get the previous boundary. 4365 final WordIterator wordIterator = getWordIteratorWithText(); 4366 4367 final int precedingOffset = wordIterator.preceding(offset); 4368 if (mStartOffset < offset) { 4369 // Expanding with bottom handle, in this case the selection end 4370 // is before the finger. 4371 offset = Math.max(precedingOffset - 1, 0); 4372 } else { 4373 // Expand with the start handle, in this case the selection 4374 // start is before the finger. 4375 if (precedingOffset == WordIterator.DONE) { 4376 offset = 0; 4377 } else { 4378 offset = wordIterator.preceding(precedingOffset); 4379 } 4380 } 4381 } 4382 if (offset == WordIterator.DONE) 4383 offset = rawOffset; 4384 4385 // Need to adjust start offset based on direction of movement. 4386 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4387 : getWordEnd(mStartOffset, true); 4388 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4389 offset); 4390 } 4391 } 4392 break; 4393 4394 case MotionEvent.ACTION_UP: 4395 mPreviousTapUpTime = SystemClock.uptimeMillis(); 4396 if (mDragAcceleratorActive) { 4397 // No longer dragging to select text, let the parent intercept events. 4398 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4399 4400 show(); 4401 int startOffset = mTextView.getSelectionStart(); 4402 int endOffset = mTextView.getSelectionEnd(); 4403 4404 // Since we don't let drag handles pass once they're visible, we need to 4405 // make sure the start / end locations are correct because the user *can* 4406 // switch directions during the initial drag. 4407 if (endOffset < startOffset) { 4408 int tmp = endOffset; 4409 endOffset = startOffset; 4410 startOffset = tmp; 4411 4412 // Also update the selection with the right offsets in this case. 4413 Selection.setSelection((Spannable) mTextView.getText(), 4414 startOffset, endOffset); 4415 } 4416 4417 // Need to do this to display the handles. 4418 mStartHandle.showAtLocation(startOffset); 4419 mEndHandle.showAtLocation(endOffset); 4420 4421 // No longer the first dragging motion, reset. 4422 mDragAcceleratorActive = false; 4423 mStartOffset = -1; 4424 } 4425 break; 4426 } 4427 } 4428 4429 /** 4430 * @param event 4431 */ 4432 private void updateMinAndMaxOffsets(MotionEvent event) { 4433 int pointerCount = event.getPointerCount(); 4434 for (int index = 0; index < pointerCount; index++) { 4435 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4436 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4437 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4438 } 4439 } 4440 4441 public int getMinTouchOffset() { 4442 return mMinTouchOffset; 4443 } 4444 4445 public int getMaxTouchOffset() { 4446 return mMaxTouchOffset; 4447 } 4448 4449 public void resetTouchOffsets() { 4450 mMinTouchOffset = mMaxTouchOffset = -1; 4451 mStartOffset = -1; 4452 mDragAcceleratorActive = false; 4453 } 4454 4455 /** 4456 * @return true iff this controller is currently used to move the selection start. 4457 */ 4458 public boolean isSelectionStartDragged() { 4459 return mStartHandle != null && mStartHandle.isDragging(); 4460 } 4461 4462 /** 4463 * @return true if the user is selecting text using the drag accelerator. 4464 */ 4465 public boolean isDragAcceleratorActive() { 4466 return mDragAcceleratorActive; 4467 } 4468 4469 public void onTouchModeChanged(boolean isInTouchMode) { 4470 if (!isInTouchMode) { 4471 hide(); 4472 } 4473 } 4474 4475 @Override 4476 public void onDetached() { 4477 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4478 observer.removeOnTouchModeChangeListener(this); 4479 4480 if (mStartHandle != null) mStartHandle.onDetached(); 4481 if (mEndHandle != null) mEndHandle.onDetached(); 4482 } 4483 } 4484 4485 private class CorrectionHighlighter { 4486 private final Path mPath = new Path(); 4487 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4488 private int mStart, mEnd; 4489 private long mFadingStartTime; 4490 private RectF mTempRectF; 4491 private final static int FADE_OUT_DURATION = 400; 4492 4493 public CorrectionHighlighter() { 4494 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4495 applicationScale); 4496 mPaint.setStyle(Paint.Style.FILL); 4497 } 4498 4499 public void highlight(CorrectionInfo info) { 4500 mStart = info.getOffset(); 4501 mEnd = mStart + info.getNewText().length(); 4502 mFadingStartTime = SystemClock.uptimeMillis(); 4503 4504 if (mStart < 0 || mEnd < 0) { 4505 stopAnimation(); 4506 } 4507 } 4508 4509 public void draw(Canvas canvas, int cursorOffsetVertical) { 4510 if (updatePath() && updatePaint()) { 4511 if (cursorOffsetVertical != 0) { 4512 canvas.translate(0, cursorOffsetVertical); 4513 } 4514 4515 canvas.drawPath(mPath, mPaint); 4516 4517 if (cursorOffsetVertical != 0) { 4518 canvas.translate(0, -cursorOffsetVertical); 4519 } 4520 invalidate(true); // TODO invalidate cursor region only 4521 } else { 4522 stopAnimation(); 4523 invalidate(false); // TODO invalidate cursor region only 4524 } 4525 } 4526 4527 private boolean updatePaint() { 4528 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4529 if (duration > FADE_OUT_DURATION) return false; 4530 4531 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4532 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4533 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4534 ((int) (highlightColorAlpha * coef) << 24); 4535 mPaint.setColor(color); 4536 return true; 4537 } 4538 4539 private boolean updatePath() { 4540 final Layout layout = mTextView.getLayout(); 4541 if (layout == null) return false; 4542 4543 // Update in case text is edited while the animation is run 4544 final int length = mTextView.getText().length(); 4545 int start = Math.min(length, mStart); 4546 int end = Math.min(length, mEnd); 4547 4548 mPath.reset(); 4549 layout.getSelectionPath(start, end, mPath); 4550 return true; 4551 } 4552 4553 private void invalidate(boolean delayed) { 4554 if (mTextView.getLayout() == null) return; 4555 4556 if (mTempRectF == null) mTempRectF = new RectF(); 4557 mPath.computeBounds(mTempRectF, false); 4558 4559 int left = mTextView.getCompoundPaddingLeft(); 4560 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4561 4562 if (delayed) { 4563 mTextView.postInvalidateOnAnimation( 4564 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4565 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4566 } else { 4567 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4568 (int) mTempRectF.right, (int) mTempRectF.bottom); 4569 } 4570 } 4571 4572 private void stopAnimation() { 4573 Editor.this.mCorrectionHighlighter = null; 4574 } 4575 } 4576 4577 private static class ErrorPopup extends PopupWindow { 4578 private boolean mAbove = false; 4579 private final TextView mView; 4580 private int mPopupInlineErrorBackgroundId = 0; 4581 private int mPopupInlineErrorAboveBackgroundId = 0; 4582 4583 ErrorPopup(TextView v, int width, int height) { 4584 super(v, width, height); 4585 mView = v; 4586 // Make sure the TextView has a background set as it will be used the first time it is 4587 // shown and positioned. Initialized with below background, which should have 4588 // dimensions identical to the above version for this to work (and is more likely). 4589 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4590 com.android.internal.R.styleable.Theme_errorMessageBackground); 4591 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4592 } 4593 4594 void fixDirection(boolean above) { 4595 mAbove = above; 4596 4597 if (above) { 4598 mPopupInlineErrorAboveBackgroundId = 4599 getResourceId(mPopupInlineErrorAboveBackgroundId, 4600 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4601 } else { 4602 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4603 com.android.internal.R.styleable.Theme_errorMessageBackground); 4604 } 4605 4606 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4607 mPopupInlineErrorBackgroundId); 4608 } 4609 4610 private int getResourceId(int currentId, int index) { 4611 if (currentId == 0) { 4612 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4613 R.styleable.Theme); 4614 currentId = styledAttributes.getResourceId(index, 0); 4615 styledAttributes.recycle(); 4616 } 4617 return currentId; 4618 } 4619 4620 @Override 4621 public void update(int x, int y, int w, int h, boolean force) { 4622 super.update(x, y, w, h, force); 4623 4624 boolean above = isAboveAnchor(); 4625 if (above != mAbove) { 4626 fixDirection(above); 4627 } 4628 } 4629 } 4630 4631 static class InputContentType { 4632 int imeOptions = EditorInfo.IME_NULL; 4633 String privateImeOptions; 4634 CharSequence imeActionLabel; 4635 int imeActionId; 4636 Bundle extras; 4637 OnEditorActionListener onEditorActionListener; 4638 boolean enterDown; 4639 } 4640 4641 static class InputMethodState { 4642 Rect mCursorRectInWindow = new Rect(); 4643 float[] mTmpOffset = new float[2]; 4644 ExtractedTextRequest mExtractedTextRequest; 4645 final ExtractedText mExtractedText = new ExtractedText(); 4646 int mBatchEditNesting; 4647 boolean mCursorChanged; 4648 boolean mSelectionModeChanged; 4649 boolean mContentChanged; 4650 int mChangedStart, mChangedEnd, mChangedDelta; 4651 } 4652 4653 /** 4654 * @return True iff (start, end) is a valid range within the text. 4655 */ 4656 private static boolean isValidRange(CharSequence text, int start, int end) { 4657 return 0 <= start && start <= end && end <= text.length(); 4658 } 4659 4660 /** 4661 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4662 * text being typed (and hence always returns null from the filter() method). 4663 */ 4664 public static class UndoInputFilter implements InputFilter { 4665 private final Editor mEditor; 4666 4667 // Whether the current filter pass is directly caused by an end-user text edit. 4668 private boolean mIsUserEdit; 4669 4670 // Whether the text field is handling an IME composition. Must be parceled in case the user 4671 // rotates the screen during composition. 4672 private boolean mHasComposition; 4673 4674 public UndoInputFilter(Editor editor) { 4675 mEditor = editor; 4676 } 4677 4678 public void saveInstanceState(Parcel parcel) { 4679 parcel.writeInt(mIsUserEdit ? 1 : 0); 4680 parcel.writeInt(mHasComposition ? 1 : 0); 4681 } 4682 4683 public void restoreInstanceState(Parcel parcel) { 4684 mIsUserEdit = parcel.readInt() != 0; 4685 mHasComposition = parcel.readInt() != 0; 4686 } 4687 4688 /** 4689 * Signals that a user-triggered edit is starting. 4690 */ 4691 public void beginBatchEdit() { 4692 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4693 mIsUserEdit = true; 4694 } 4695 4696 public void endBatchEdit() { 4697 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4698 mIsUserEdit = false; 4699 } 4700 4701 @Override 4702 public CharSequence filter(CharSequence source, int start, int end, 4703 Spanned dest, int dstart, int dend) { 4704 if (DEBUG_UNDO) { 4705 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4706 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4707 } 4708 4709 // Check to see if this edit should be tracked for undo. 4710 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4711 return null; 4712 } 4713 4714 // Check for and handle IME composition edits. 4715 if (handleCompositionEdit(source, start, end, dstart)) { 4716 return null; 4717 } 4718 4719 // Handle keyboard edits. 4720 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4721 return null; 4722 } 4723 4724 /** 4725 * Returns true iff the edit was handled, either because it should be ignored or because 4726 * this function created an undo operation for it. 4727 */ 4728 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4729 // Ignore edits while the user is composing. 4730 if (isComposition(source)) { 4731 mHasComposition = true; 4732 return true; 4733 } 4734 final boolean hadComposition = mHasComposition; 4735 mHasComposition = false; 4736 4737 // Check for the transition out of the composing state. 4738 if (hadComposition) { 4739 // If there was no text the user canceled composition. Ignore the edit. 4740 if (start == end) { 4741 return true; 4742 } 4743 4744 // Otherwise the user inserted the composition. 4745 String newText = TextUtils.substring(source, start, end); 4746 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4747 recordEdit(edit, false /* forceMerge */); 4748 return true; 4749 } 4750 4751 // This was neither a composition event nor a transition out of composing. 4752 return false; 4753 } 4754 4755 private void handleKeyboardEdit(CharSequence source, int start, int end, 4756 Spanned dest, int dstart, int dend) { 4757 // An application may install a TextWatcher to provide additional modifications after 4758 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4759 // string). This results in multiple filter() calls for what the user considers to be 4760 // a single operation. Always undo the whole set of changes in one step. 4761 final boolean forceMerge = isInTextWatcher(); 4762 4763 // Build a new operation with all the information from this edit. 4764 String newText = TextUtils.substring(source, start, end); 4765 String oldText = TextUtils.substring(dest, dstart, dend); 4766 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4767 recordEdit(edit, forceMerge); 4768 } 4769 4770 /** 4771 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4772 * If forceMerge is true then the new edit is always merged. 4773 */ 4774 private void recordEdit(EditOperation edit, boolean forceMerge) { 4775 // Fetch the last edit operation and attempt to merge in the new edit. 4776 final UndoManager um = mEditor.mUndoManager; 4777 um.beginUpdate("Edit text"); 4778 EditOperation lastEdit = um.getLastOperation( 4779 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4780 if (lastEdit == null) { 4781 // Add this as the first edit. 4782 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4783 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4784 } else if (forceMerge) { 4785 // Forced merges take priority because they could be the result of a non-user-edit 4786 // change and this case should not create a new undo operation. 4787 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4788 lastEdit.forceMergeWith(edit); 4789 } else if (!mIsUserEdit) { 4790 // An application directly modified the Editable outside of a text edit. Treat this 4791 // as a new change and don't attempt to merge. 4792 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4793 um.commitState(mEditor.mUndoOwner); 4794 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4795 } else if (lastEdit.mergeWith(edit)) { 4796 // Merge succeeded, nothing else to do. 4797 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4798 } else { 4799 // Could not merge with the last edit, so commit the last edit and add this edit. 4800 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4801 um.commitState(mEditor.mUndoOwner); 4802 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4803 } 4804 um.endUpdate(); 4805 } 4806 4807 private boolean canUndoEdit(CharSequence source, int start, int end, 4808 Spanned dest, int dstart, int dend) { 4809 if (!mEditor.mAllowUndo) { 4810 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4811 return false; 4812 } 4813 4814 if (mEditor.mUndoManager.isInUndo()) { 4815 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4816 return false; 4817 } 4818 4819 // Text filters run before input operations are applied. However, some input operations 4820 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4821 // attempt to undo invalid operations. 4822 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4823 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4824 return false; 4825 } 4826 4827 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4828 // on an input field. Skip no-op changes. 4829 if (start == end && dstart == dend) { 4830 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4831 return false; 4832 } 4833 4834 return true; 4835 } 4836 4837 private boolean isComposition(CharSequence source) { 4838 if (!(source instanceof Spannable)) { 4839 return false; 4840 } 4841 // This is a composition edit if the source has a non-zero-length composing span. 4842 Spannable text = (Spannable) source; 4843 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4844 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4845 return composeBegin < composeEnd; 4846 } 4847 4848 private boolean isInTextWatcher() { 4849 CharSequence text = mEditor.mTextView.getText(); 4850 return (text instanceof SpannableStringBuilder) 4851 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4852 } 4853 } 4854 4855 /** 4856 * An operation to undo a single "edit" to a text view. 4857 */ 4858 public static class EditOperation extends UndoOperation<Editor> { 4859 private static final int TYPE_INSERT = 0; 4860 private static final int TYPE_DELETE = 1; 4861 private static final int TYPE_REPLACE = 2; 4862 4863 private int mType; 4864 private String mOldText; 4865 private int mOldTextStart; 4866 private String mNewText; 4867 private int mNewTextStart; 4868 4869 private int mOldCursorPos; 4870 private int mNewCursorPos; 4871 4872 /** 4873 * Constructs an edit operation from a text input operation on editor that replaces the 4874 * oldText starting at dstart with newText. 4875 */ 4876 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 4877 super(editor.mUndoOwner); 4878 mOldText = oldText; 4879 mNewText = newText; 4880 4881 // Determine the type of the edit and store where it occurred. Avoid storing 4882 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4883 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4884 // outside the bounds of the final text). 4885 if (mNewText.length() > 0 && mOldText.length() == 0) { 4886 mType = TYPE_INSERT; 4887 mNewTextStart = dstart; 4888 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4889 mType = TYPE_DELETE; 4890 mOldTextStart = dstart; 4891 } else { 4892 mType = TYPE_REPLACE; 4893 mOldTextStart = mNewTextStart = dstart; 4894 } 4895 4896 // Store cursor data. 4897 mOldCursorPos = editor.mTextView.getSelectionStart(); 4898 mNewCursorPos = dstart + mNewText.length(); 4899 } 4900 4901 public EditOperation(Parcel src, ClassLoader loader) { 4902 super(src, loader); 4903 mType = src.readInt(); 4904 mOldText = src.readString(); 4905 mOldTextStart = src.readInt(); 4906 mNewText = src.readString(); 4907 mNewTextStart = src.readInt(); 4908 mOldCursorPos = src.readInt(); 4909 mNewCursorPos = src.readInt(); 4910 } 4911 4912 @Override 4913 public void writeToParcel(Parcel dest, int flags) { 4914 dest.writeInt(mType); 4915 dest.writeString(mOldText); 4916 dest.writeInt(mOldTextStart); 4917 dest.writeString(mNewText); 4918 dest.writeInt(mNewTextStart); 4919 dest.writeInt(mOldCursorPos); 4920 dest.writeInt(mNewCursorPos); 4921 } 4922 4923 private int getNewTextEnd() { 4924 return mNewTextStart + mNewText.length(); 4925 } 4926 4927 private int getOldTextEnd() { 4928 return mOldTextStart + mOldText.length(); 4929 } 4930 4931 @Override 4932 public void commit() { 4933 } 4934 4935 @Override 4936 public void undo() { 4937 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4938 // Remove the new text and insert the old. 4939 Editor editor = getOwnerData(); 4940 Editable text = (Editable) editor.mTextView.getText(); 4941 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4942 mOldCursorPos); 4943 } 4944 4945 @Override 4946 public void redo() { 4947 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4948 // Remove the old text and insert the new. 4949 Editor editor = getOwnerData(); 4950 Editable text = (Editable) editor.mTextView.getText(); 4951 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4952 mNewCursorPos); 4953 } 4954 4955 /** 4956 * Attempts to merge this existing operation with a new edit. 4957 * @param edit The new edit operation. 4958 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4959 * object unchanged. 4960 */ 4961 private boolean mergeWith(EditOperation edit) { 4962 if (DEBUG_UNDO) { 4963 Log.d(TAG, "mergeWith old " + this); 4964 Log.d(TAG, "mergeWith new " + edit); 4965 } 4966 switch (mType) { 4967 case TYPE_INSERT: 4968 return mergeInsertWith(edit); 4969 case TYPE_DELETE: 4970 return mergeDeleteWith(edit); 4971 case TYPE_REPLACE: 4972 return mergeReplaceWith(edit); 4973 default: 4974 return false; 4975 } 4976 } 4977 4978 private boolean mergeInsertWith(EditOperation edit) { 4979 // Only merge continuous insertions. 4980 if (edit.mType != TYPE_INSERT) { 4981 return false; 4982 } 4983 // Only merge insertions that are contiguous. 4984 if (getNewTextEnd() != edit.mNewTextStart) { 4985 return false; 4986 } 4987 mNewText += edit.mNewText; 4988 mNewCursorPos = edit.mNewCursorPos; 4989 return true; 4990 } 4991 4992 // TODO: Support forward delete. 4993 private boolean mergeDeleteWith(EditOperation edit) { 4994 // Only merge continuous deletes. 4995 if (edit.mType != TYPE_DELETE) { 4996 return false; 4997 } 4998 // Only merge deletions that are contiguous. 4999 if (mOldTextStart != edit.getOldTextEnd()) { 5000 return false; 5001 } 5002 mOldTextStart = edit.mOldTextStart; 5003 mOldText = edit.mOldText + mOldText; 5004 mNewCursorPos = edit.mNewCursorPos; 5005 return true; 5006 } 5007 5008 private boolean mergeReplaceWith(EditOperation edit) { 5009 // Replacements can merge only with adjacent inserts. 5010 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 5011 return false; 5012 } 5013 mOldText += edit.mOldText; 5014 mNewText += edit.mNewText; 5015 mNewCursorPos = edit.mNewCursorPos; 5016 return true; 5017 } 5018 5019 /** 5020 * Forcibly creates a single merged edit operation by simulating the entire text 5021 * contents being replaced. 5022 */ 5023 public void forceMergeWith(EditOperation edit) { 5024 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5025 Editor editor = getOwnerData(); 5026 5027 // Copy the text of the current field. 5028 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5029 // but would require two parallel implementations of modifyText() because Editable and 5030 // StringBuilder do not share an interface for replace/delete/insert. 5031 Editable editable = (Editable) editor.mTextView.getText(); 5032 Editable originalText = new SpannableStringBuilder(editable.toString()); 5033 5034 // Roll back the last operation. 5035 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5036 mOldCursorPos); 5037 5038 // Clone the text again and apply the new operation. 5039 Editable finalText = new SpannableStringBuilder(editable.toString()); 5040 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5041 edit.mNewTextStart, edit.mNewCursorPos); 5042 5043 // Convert this operation into a non-mergeable replacement of the entire string. 5044 mType = TYPE_REPLACE; 5045 mNewText = finalText.toString(); 5046 mNewTextStart = 0; 5047 mOldText = originalText.toString(); 5048 mOldTextStart = 0; 5049 mNewCursorPos = edit.mNewCursorPos; 5050 // mOldCursorPos is unchanged. 5051 } 5052 5053 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5054 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5055 // Apply the edit if it is still valid. 5056 if (isValidRange(text, deleteFrom, deleteTo) && 5057 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5058 if (deleteFrom != deleteTo) { 5059 text.delete(deleteFrom, deleteTo); 5060 } 5061 if (newText.length() != 0) { 5062 text.insert(newTextInsertAt, newText); 5063 } 5064 } 5065 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5066 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5067 // TODO: Select all the text that was undone. 5068 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5069 Selection.setSelection(text, newCursorPos); 5070 } 5071 } 5072 5073 private String getTypeString() { 5074 switch (mType) { 5075 case TYPE_INSERT: 5076 return "insert"; 5077 case TYPE_DELETE: 5078 return "delete"; 5079 case TYPE_REPLACE: 5080 return "replace"; 5081 default: 5082 return ""; 5083 } 5084 } 5085 5086 @Override 5087 public String toString() { 5088 return "[mType=" + getTypeString() + ", " + 5089 "mOldText=" + mOldText + ", " + 5090 "mOldTextStart=" + mOldTextStart + ", " + 5091 "mNewText=" + mNewText + ", " + 5092 "mNewTextStart=" + mNewTextStart + ", " + 5093 "mOldCursorPos=" + mOldCursorPos + ", " + 5094 "mNewCursorPos=" + mNewCursorPos + "]"; 5095 } 5096 5097 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5098 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5099 @Override 5100 public EditOperation createFromParcel(Parcel in) { 5101 return new EditOperation(in, null); 5102 } 5103 5104 @Override 5105 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5106 return new EditOperation(in, loader); 5107 } 5108 5109 @Override 5110 public EditOperation[] newArray(int size) { 5111 return new EditOperation[size]; 5112 } 5113 }; 5114 } 5115} 5116