Editor.java revision 78214c90dbe88b0847fe293a1b64f7463ccc9f16
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.WordIterator; 66import android.text.style.EasyEditSpan; 67import android.text.style.SuggestionRangeSpan; 68import android.text.style.SuggestionSpan; 69import android.text.style.TextAppearanceSpan; 70import android.text.style.URLSpan; 71import android.util.DisplayMetrics; 72import android.util.Log; 73import android.view.ActionMode; 74import android.view.ActionMode.Callback; 75import android.view.DisplayListCanvas; 76import android.view.DragEvent; 77import android.view.Gravity; 78import android.view.LayoutInflater; 79import android.view.Menu; 80import android.view.MenuItem; 81import android.view.MotionEvent; 82import android.view.RenderNode; 83import android.view.View; 84import android.view.View.DragShadowBuilder; 85import android.view.View.OnClickListener; 86import android.view.ViewConfiguration; 87import android.view.ViewGroup; 88import android.view.ViewGroup.LayoutParams; 89import android.view.ViewParent; 90import android.view.ViewTreeObserver; 91import android.view.WindowManager; 92import android.view.inputmethod.CorrectionInfo; 93import android.view.inputmethod.CursorAnchorInfo; 94import android.view.inputmethod.EditorInfo; 95import android.view.inputmethod.ExtractedText; 96import android.view.inputmethod.ExtractedTextRequest; 97import android.view.inputmethod.InputConnection; 98import android.view.inputmethod.InputMethodManager; 99import android.widget.AdapterView.OnItemClickListener; 100import android.widget.TextView.Drawables; 101import android.widget.TextView.OnEditorActionListener; 102 103import com.android.internal.util.ArrayUtils; 104import com.android.internal.util.GrowingArrayUtils; 105import com.android.internal.widget.EditableInputConnection; 106 107import java.text.BreakIterator; 108import java.util.Arrays; 109import java.util.Comparator; 110import java.util.HashMap; 111import java.util.List; 112 113/** 114 * Helper class used by TextView to handle editable text views. 115 * 116 * @hide 117 */ 118public class Editor { 119 private static final String TAG = "Editor"; 120 private static final boolean DEBUG_UNDO = false; 121 122 static final int BLINK = 500; 123 private static final float[] TEMP_POSITION = new float[2]; 124 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 125 // Tag used when the Editor maintains its own separate UndoManager. 126 private static final String UNDO_OWNER_TAG = "Editor"; 127 128 // Each Editor manages its own undo stack. 129 private final UndoManager mUndoManager = new UndoManager(); 130 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 131 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 132 boolean mAllowUndo = true; 133 134 // Cursor Controllers. 135 InsertionPointCursorController mInsertionPointCursorController; 136 SelectionModifierCursorController mSelectionModifierCursorController; 137 ActionMode mSelectionActionMode; 138 boolean mInsertionControllerEnabled; 139 boolean mSelectionControllerEnabled; 140 141 // Used to highlight a word when it is corrected by the IME 142 CorrectionHighlighter mCorrectionHighlighter; 143 144 InputContentType mInputContentType; 145 InputMethodState mInputMethodState; 146 147 private static class TextDisplayList { 148 RenderNode displayList; 149 boolean isDirty; 150 public TextDisplayList(String name) { 151 isDirty = true; 152 displayList = RenderNode.create(name, null); 153 } 154 boolean needsRecord() { return isDirty || !displayList.isValid(); } 155 } 156 TextDisplayList[] mTextDisplayLists; 157 158 boolean mFrozenWithFocus; 159 boolean mSelectionMoved; 160 boolean mTouchFocusSelected; 161 162 KeyListener mKeyListener; 163 int mInputType = EditorInfo.TYPE_NULL; 164 165 boolean mDiscardNextActionUp; 166 boolean mIgnoreActionUpEvent; 167 168 long mShowCursor; 169 Blink mBlink; 170 171 boolean mCursorVisible = true; 172 boolean mSelectAllOnFocus; 173 boolean mTextIsSelectable; 174 175 CharSequence mError; 176 boolean mErrorWasChanged; 177 ErrorPopup mErrorPopup; 178 179 /** 180 * This flag is set if the TextView tries to display an error before it 181 * is attached to the window (so its position is still unknown). 182 * It causes the error to be shown later, when onAttachedToWindow() 183 * is called. 184 */ 185 boolean mShowErrorAfterAttach; 186 187 boolean mInBatchEditControllers; 188 boolean mShowSoftInputOnFocus = true; 189 boolean mPreserveDetachedSelection; 190 boolean mTemporaryDetach; 191 192 SuggestionsPopupWindow mSuggestionsPopupWindow; 193 SuggestionRangeSpan mSuggestionRangeSpan; 194 Runnable mShowSuggestionRunnable; 195 196 final Drawable[] mCursorDrawable = new Drawable[2]; 197 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 198 199 private Drawable mSelectHandleLeft; 200 private Drawable mSelectHandleRight; 201 private Drawable mSelectHandleCenter; 202 203 // Global listener that detects changes in the global position of the TextView 204 private PositionListener mPositionListener; 205 206 float mLastDownPositionX, mLastDownPositionY; 207 Callback mCustomSelectionActionModeCallback; 208 209 // Set when this TextView gained focus with some text selected. Will start selection mode. 210 boolean mCreatedWithASelection; 211 212 // The span controller helps monitoring the changes to which the Editor needs to react: 213 // - EasyEditSpans, for which we have some UI to display on attach and on hide 214 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 215 private SpanController mSpanController; 216 217 WordIterator mWordIterator; 218 SpellChecker mSpellChecker; 219 220 // This word iterator is set with text and used to determine word boundaries 221 // when a user is selecting text. 222 private WordIterator mWordIteratorWithText; 223 // Indicate that the text in the word iterator needs to be updated. 224 private boolean mUpdateWordIteratorText; 225 226 private Rect mTempRect; 227 228 private TextView mTextView; 229 230 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 231 232 Editor(TextView textView) { 233 mTextView = textView; 234 // Synchronize the filter list, which places the undo input filter at the end. 235 mTextView.setFilters(mTextView.getFilters()); 236 } 237 238 ParcelableParcel saveInstanceState() { 239 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 240 Parcel parcel = state.getParcel(); 241 mUndoManager.saveInstanceState(parcel); 242 mUndoInputFilter.saveInstanceState(parcel); 243 return state; 244 } 245 246 void restoreInstanceState(ParcelableParcel state) { 247 Parcel parcel = state.getParcel(); 248 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 249 mUndoInputFilter.restoreInstanceState(parcel); 250 // Re-associate this object as the owner of undo state. 251 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 252 } 253 254 /** 255 * Forgets all undo and redo operations for this Editor. 256 */ 257 void forgetUndoRedo() { 258 UndoOwner[] owners = { mUndoOwner }; 259 mUndoManager.forgetUndos(owners, -1 /* all */); 260 mUndoManager.forgetRedos(owners, -1 /* all */); 261 } 262 263 boolean canUndo() { 264 UndoOwner[] owners = { mUndoOwner }; 265 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 266 } 267 268 boolean canRedo() { 269 UndoOwner[] owners = { mUndoOwner }; 270 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 271 } 272 273 void undo() { 274 if (!mAllowUndo) { 275 return; 276 } 277 UndoOwner[] owners = { mUndoOwner }; 278 mUndoManager.undo(owners, 1); // Undo 1 action. 279 } 280 281 void redo() { 282 if (!mAllowUndo) { 283 return; 284 } 285 UndoOwner[] owners = { mUndoOwner }; 286 mUndoManager.redo(owners, 1); // Redo 1 action. 287 } 288 289 void onAttachedToWindow() { 290 if (mShowErrorAfterAttach) { 291 showError(); 292 mShowErrorAfterAttach = false; 293 } 294 mTemporaryDetach = false; 295 296 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 297 // No need to create the controller. 298 // The get method will add the listener on controller creation. 299 if (mInsertionPointCursorController != null) { 300 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 301 } 302 if (mSelectionModifierCursorController != null) { 303 mSelectionModifierCursorController.resetTouchOffsets(); 304 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 305 } 306 updateSpellCheckSpans(0, mTextView.getText().length(), 307 true /* create the spell checker if needed */); 308 309 if (mTextView.hasTransientState() && 310 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 311 // Since transient state is reference counted make sure it stays matched 312 // with our own calls to it for managing selection. 313 // The action mode callback will set this back again when/if the action mode starts. 314 mTextView.setHasTransientState(false); 315 316 // We had an active selection from before, start the selection mode. 317 startSelectionActionModeWithSelection(); 318 } 319 320 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 321 } 322 323 void onDetachedFromWindow() { 324 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 325 326 if (mError != null) { 327 hideError(); 328 } 329 330 if (mBlink != null) { 331 mBlink.removeCallbacks(mBlink); 332 } 333 334 if (mInsertionPointCursorController != null) { 335 mInsertionPointCursorController.onDetached(); 336 } 337 338 if (mSelectionModifierCursorController != null) { 339 mSelectionModifierCursorController.onDetached(); 340 } 341 342 if (mShowSuggestionRunnable != null) { 343 mTextView.removeCallbacks(mShowSuggestionRunnable); 344 } 345 346 destroyDisplayListsData(); 347 348 if (mSpellChecker != null) { 349 mSpellChecker.closeSession(); 350 // Forces the creation of a new SpellChecker next time this window is created. 351 // Will handle the cases where the settings has been changed in the meantime. 352 mSpellChecker = null; 353 } 354 355 mPreserveDetachedSelection = true; 356 hideControllers(); 357 mPreserveDetachedSelection = false; 358 mTemporaryDetach = false; 359 } 360 361 private void destroyDisplayListsData() { 362 if (mTextDisplayLists != null) { 363 for (int i = 0; i < mTextDisplayLists.length; i++) { 364 RenderNode displayList = mTextDisplayLists[i] != null 365 ? mTextDisplayLists[i].displayList : null; 366 if (displayList != null && displayList.isValid()) { 367 displayList.destroyDisplayListData(); 368 } 369 } 370 } 371 } 372 373 private void showError() { 374 if (mTextView.getWindowToken() == null) { 375 mShowErrorAfterAttach = true; 376 return; 377 } 378 379 if (mErrorPopup == null) { 380 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 381 final TextView err = (TextView) inflater.inflate( 382 com.android.internal.R.layout.textview_hint, null); 383 384 final float scale = mTextView.getResources().getDisplayMetrics().density; 385 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 386 mErrorPopup.setFocusable(false); 387 // The user is entering text, so the input method is needed. We 388 // don't want the popup to be displayed on top of it. 389 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 390 } 391 392 TextView tv = (TextView) mErrorPopup.getContentView(); 393 chooseSize(mErrorPopup, mError, tv); 394 tv.setText(mError); 395 396 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 397 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 398 } 399 400 public void setError(CharSequence error, Drawable icon) { 401 mError = TextUtils.stringOrSpannedString(error); 402 mErrorWasChanged = true; 403 404 if (mError == null) { 405 setErrorIcon(null); 406 if (mErrorPopup != null) { 407 if (mErrorPopup.isShowing()) { 408 mErrorPopup.dismiss(); 409 } 410 411 mErrorPopup = null; 412 } 413 mShowErrorAfterAttach = false; 414 } else { 415 setErrorIcon(icon); 416 if (mTextView.isFocused()) { 417 showError(); 418 } 419 } 420 } 421 422 private void setErrorIcon(Drawable icon) { 423 Drawables dr = mTextView.mDrawables; 424 if (dr == null) { 425 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 426 } 427 dr.setErrorDrawable(icon, mTextView); 428 429 mTextView.resetResolvedDrawables(); 430 mTextView.invalidate(); 431 mTextView.requestLayout(); 432 } 433 434 private void hideError() { 435 if (mErrorPopup != null) { 436 if (mErrorPopup.isShowing()) { 437 mErrorPopup.dismiss(); 438 } 439 } 440 441 mShowErrorAfterAttach = false; 442 } 443 444 /** 445 * Returns the X offset to make the pointy top of the error point 446 * at the middle of the error icon. 447 */ 448 private int getErrorX() { 449 /* 450 * The "25" is the distance between the point and the right edge 451 * of the background 452 */ 453 final float scale = mTextView.getResources().getDisplayMetrics().density; 454 455 final Drawables dr = mTextView.mDrawables; 456 457 final int layoutDirection = mTextView.getLayoutDirection(); 458 int errorX; 459 int offset; 460 switch (layoutDirection) { 461 default: 462 case View.LAYOUT_DIRECTION_LTR: 463 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 464 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 465 mTextView.getPaddingRight() + offset; 466 break; 467 case View.LAYOUT_DIRECTION_RTL: 468 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 469 errorX = mTextView.getPaddingLeft() + offset; 470 break; 471 } 472 return errorX; 473 } 474 475 /** 476 * Returns the Y offset to make the pointy top of the error point 477 * at the bottom of the error icon. 478 */ 479 private int getErrorY() { 480 /* 481 * Compound, not extended, because the icon is not clipped 482 * if the text height is smaller. 483 */ 484 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 485 int vspace = mTextView.getBottom() - mTextView.getTop() - 486 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 487 488 final Drawables dr = mTextView.mDrawables; 489 490 final int layoutDirection = mTextView.getLayoutDirection(); 491 int height; 492 switch (layoutDirection) { 493 default: 494 case View.LAYOUT_DIRECTION_LTR: 495 height = (dr != null ? dr.mDrawableHeightRight : 0); 496 break; 497 case View.LAYOUT_DIRECTION_RTL: 498 height = (dr != null ? dr.mDrawableHeightLeft : 0); 499 break; 500 } 501 502 int icontop = compoundPaddingTop + (vspace - height) / 2; 503 504 /* 505 * The "2" is the distance between the point and the top edge 506 * of the background. 507 */ 508 final float scale = mTextView.getResources().getDisplayMetrics().density; 509 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 510 } 511 512 void createInputContentTypeIfNeeded() { 513 if (mInputContentType == null) { 514 mInputContentType = new InputContentType(); 515 } 516 } 517 518 void createInputMethodStateIfNeeded() { 519 if (mInputMethodState == null) { 520 mInputMethodState = new InputMethodState(); 521 } 522 } 523 524 boolean isCursorVisible() { 525 // The default value is true, even when there is no associated Editor 526 return mCursorVisible && mTextView.isTextEditable(); 527 } 528 529 void prepareCursorControllers() { 530 boolean windowSupportsHandles = false; 531 532 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 533 if (params instanceof WindowManager.LayoutParams) { 534 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 535 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 536 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 537 } 538 539 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 540 mInsertionControllerEnabled = enabled && isCursorVisible(); 541 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 542 543 if (!mInsertionControllerEnabled) { 544 hideInsertionPointCursorController(); 545 if (mInsertionPointCursorController != null) { 546 mInsertionPointCursorController.onDetached(); 547 mInsertionPointCursorController = null; 548 } 549 } 550 551 if (!mSelectionControllerEnabled) { 552 stopSelectionActionMode(); 553 if (mSelectionModifierCursorController != null) { 554 mSelectionModifierCursorController.onDetached(); 555 mSelectionModifierCursorController = null; 556 } 557 } 558 } 559 560 void hideInsertionPointCursorController() { 561 if (mInsertionPointCursorController != null) { 562 mInsertionPointCursorController.hide(); 563 } 564 } 565 566 /** 567 * Hides the insertion controller and stops text selection mode, hiding the selection controller 568 */ 569 void hideControllers() { 570 hideCursorControllers(); 571 hideSpanControllers(); 572 } 573 574 private void hideSpanControllers() { 575 if (mSpanController != null) { 576 mSpanController.hide(); 577 } 578 } 579 580 private void hideCursorControllers() { 581 if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) { 582 // Should be done before hide insertion point controller since it triggers a show of it 583 mSuggestionsPopupWindow.hide(); 584 } 585 hideInsertionPointCursorController(); 586 stopSelectionActionMode(); 587 } 588 589 /** 590 * Create new SpellCheckSpans on the modified region. 591 */ 592 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 593 // Remove spans whose adjacent characters are text not punctuation 594 mTextView.removeAdjacentSuggestionSpans(start); 595 mTextView.removeAdjacentSuggestionSpans(end); 596 597 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 598 !(mTextView instanceof ExtractEditText)) { 599 if (mSpellChecker == null && createSpellChecker) { 600 mSpellChecker = new SpellChecker(mTextView); 601 } 602 if (mSpellChecker != null) { 603 mSpellChecker.spellCheck(start, end); 604 } 605 } 606 } 607 608 void onScreenStateChanged(int screenState) { 609 switch (screenState) { 610 case View.SCREEN_STATE_ON: 611 resumeBlink(); 612 break; 613 case View.SCREEN_STATE_OFF: 614 suspendBlink(); 615 break; 616 } 617 } 618 619 private void suspendBlink() { 620 if (mBlink != null) { 621 mBlink.cancel(); 622 } 623 } 624 625 private void resumeBlink() { 626 if (mBlink != null) { 627 mBlink.uncancel(); 628 makeBlink(); 629 } 630 } 631 632 void adjustInputType(boolean password, boolean passwordInputType, 633 boolean webPasswordInputType, boolean numberPasswordInputType) { 634 // mInputType has been set from inputType, possibly modified by mInputMethod. 635 // Specialize mInputType to [web]password if we have a text class and the original input 636 // type was a password. 637 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 638 if (password || passwordInputType) { 639 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 640 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 641 } 642 if (webPasswordInputType) { 643 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 644 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 645 } 646 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 647 if (numberPasswordInputType) { 648 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 649 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 650 } 651 } 652 } 653 654 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 655 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 656 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 657 658 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 659 com.android.internal.R.dimen.textview_error_popup_default_width); 660 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 661 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 662 float max = 0; 663 for (int i = 0; i < l.getLineCount(); i++) { 664 max = Math.max(max, l.getLineWidth(i)); 665 } 666 667 /* 668 * Now set the popup size to be big enough for the text plus the border capped 669 * to DEFAULT_MAX_POPUP_WIDTH 670 */ 671 pop.setWidth(wid + (int) Math.ceil(max)); 672 pop.setHeight(ht + l.getHeight()); 673 } 674 675 void setFrame() { 676 if (mErrorPopup != null) { 677 TextView tv = (TextView) mErrorPopup.getContentView(); 678 chooseSize(mErrorPopup, mError, tv); 679 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 680 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 681 } 682 } 683 684 private int getWordStart(int offset) { 685 // FIXME - For this and similar methods we're not doing anything to check if there's 686 // a LocaleSpan in the text, this may be something we should try handling or checking for. 687 int retOffset = getWordIteratorWithText().getBeginning(offset); 688 if (retOffset == BreakIterator.DONE) retOffset = offset; 689 return retOffset; 690 } 691 692 private int getWordEnd(int offset, boolean includePunctuation) { 693 int retOffset = getWordIteratorWithText().getEnd(offset); 694 if (retOffset == BreakIterator.DONE) { 695 retOffset = offset; 696 } else if (includePunctuation) { 697 retOffset = handlePunctuation(retOffset); 698 } 699 return retOffset; 700 } 701 702 private boolean isEndBoundary(int offset) { 703 int thisEnd = getWordEnd(offset, false); 704 return offset == thisEnd; 705 } 706 707 private boolean isStartBoundary(int offset) { 708 int thisStart = getWordStart(offset); 709 return thisStart == offset; 710 } 711 712 private int handlePunctuation(int offset) { 713 // FIXME - Check with UX how repeated ending punctuation should be handled. 714 // FIXME - Check with UX if / how we would handle non sentence ending characters. 715 // FIXME - Consider punctuation in different languages. 716 CharSequence text = mTextView.getText(); 717 if (offset < text.length()) { 718 int c = Character.codePointAt(text, offset); 719 if (c == 0x002e /* period */|| c == 0x003f /* question mark */ 720 || c == 0x0021 /* exclamation mark */) { 721 offset = Character.offsetByCodePoints(text, offset, 1); 722 } 723 } 724 return offset; 725 } 726 727 /** 728 * Adjusts selection to the word under last touch offset. Return true if the operation was 729 * successfully performed. 730 */ 731 private boolean selectCurrentWord() { 732 if (!mTextView.canSelectText()) { 733 return false; 734 } 735 736 if (mTextView.hasPasswordTransformationMethod()) { 737 // Always select all on a password field. 738 // Cut/copy menu entries are not available for passwords, but being able to select all 739 // is however useful to delete or paste to replace the entire content. 740 return mTextView.selectAllText(); 741 } 742 743 int inputType = mTextView.getInputType(); 744 int klass = inputType & InputType.TYPE_MASK_CLASS; 745 int variation = inputType & InputType.TYPE_MASK_VARIATION; 746 747 // Specific text field types: select the entire text for these 748 if (klass == InputType.TYPE_CLASS_NUMBER || 749 klass == InputType.TYPE_CLASS_PHONE || 750 klass == InputType.TYPE_CLASS_DATETIME || 751 variation == InputType.TYPE_TEXT_VARIATION_URI || 752 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 753 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 754 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 755 return mTextView.selectAllText(); 756 } 757 758 long lastTouchOffsets = getLastTouchOffsets(); 759 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 760 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 761 762 // Safety check in case standard touch event handling has been bypassed 763 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 764 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 765 766 int selectionStart, selectionEnd; 767 768 // If a URLSpan (web address, email, phone...) is found at that position, select it. 769 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 770 getSpans(minOffset, maxOffset, URLSpan.class); 771 if (urlSpans.length >= 1) { 772 URLSpan urlSpan = urlSpans[0]; 773 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 774 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 775 } else { 776 // FIXME - We should check if there's a LocaleSpan in the text, this may be 777 // something we should try handling or checking for. 778 final WordIterator wordIterator = getWordIterator(); 779 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 780 781 selectionStart = wordIterator.getBeginning(minOffset); 782 selectionEnd = wordIterator.getEnd(maxOffset); 783 784 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 785 selectionStart == selectionEnd) { 786 // Possible when the word iterator does not properly handle the text's language 787 long range = getCharRange(minOffset); 788 selectionStart = TextUtils.unpackRangeStartFromLong(range); 789 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 790 } 791 } 792 793 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 794 return selectionEnd > selectionStart; 795 } 796 797 void onLocaleChanged() { 798 // Will be re-created on demand in getWordIterator with the proper new locale 799 mWordIterator = null; 800 mWordIteratorWithText = null; 801 } 802 803 /** 804 * @hide 805 */ 806 public WordIterator getWordIterator() { 807 if (mWordIterator == null) { 808 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 809 } 810 return mWordIterator; 811 } 812 813 private WordIterator getWordIteratorWithText() { 814 if (mWordIteratorWithText == null) { 815 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 816 mUpdateWordIteratorText = true; 817 } 818 if (mUpdateWordIteratorText) { 819 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 820 // to the user's selection is needed. A possible solution would be to 821 // copy some number N of characters near the selection and then when the 822 // user approaches N then we'd do another copy of the next N characters. 823 CharSequence text = mTextView.getText(); 824 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 825 mUpdateWordIteratorText = false; 826 } 827 return mWordIteratorWithText; 828 } 829 830 private long getCharRange(int offset) { 831 final int textLength = mTextView.getText().length(); 832 if (offset + 1 < textLength) { 833 final char currentChar = mTextView.getText().charAt(offset); 834 final char nextChar = mTextView.getText().charAt(offset + 1); 835 if (Character.isSurrogatePair(currentChar, nextChar)) { 836 return TextUtils.packRangeInLong(offset, offset + 2); 837 } 838 } 839 if (offset < textLength) { 840 return TextUtils.packRangeInLong(offset, offset + 1); 841 } 842 if (offset - 2 >= 0) { 843 final char previousChar = mTextView.getText().charAt(offset - 1); 844 final char previousPreviousChar = mTextView.getText().charAt(offset - 2); 845 if (Character.isSurrogatePair(previousPreviousChar, previousChar)) { 846 return TextUtils.packRangeInLong(offset - 2, offset); 847 } 848 } 849 if (offset - 1 >= 0) { 850 return TextUtils.packRangeInLong(offset - 1, offset); 851 } 852 return TextUtils.packRangeInLong(offset, offset); 853 } 854 855 private boolean touchPositionIsInSelection() { 856 int selectionStart = mTextView.getSelectionStart(); 857 int selectionEnd = mTextView.getSelectionEnd(); 858 859 if (selectionStart == selectionEnd) { 860 return false; 861 } 862 863 if (selectionStart > selectionEnd) { 864 int tmp = selectionStart; 865 selectionStart = selectionEnd; 866 selectionEnd = tmp; 867 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 868 } 869 870 SelectionModifierCursorController selectionController = getSelectionController(); 871 int minOffset = selectionController.getMinTouchOffset(); 872 int maxOffset = selectionController.getMaxTouchOffset(); 873 874 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 875 } 876 877 private PositionListener getPositionListener() { 878 if (mPositionListener == null) { 879 mPositionListener = new PositionListener(); 880 } 881 return mPositionListener; 882 } 883 884 private interface TextViewPositionListener { 885 public void updatePosition(int parentPositionX, int parentPositionY, 886 boolean parentPositionChanged, boolean parentScrolled); 887 } 888 889 private boolean isPositionVisible(final float positionX, final float positionY) { 890 synchronized (TEMP_POSITION) { 891 final float[] position = TEMP_POSITION; 892 position[0] = positionX; 893 position[1] = positionY; 894 View view = mTextView; 895 896 while (view != null) { 897 if (view != mTextView) { 898 // Local scroll is already taken into account in positionX/Y 899 position[0] -= view.getScrollX(); 900 position[1] -= view.getScrollY(); 901 } 902 903 if (position[0] < 0 || position[1] < 0 || 904 position[0] > view.getWidth() || position[1] > view.getHeight()) { 905 return false; 906 } 907 908 if (!view.getMatrix().isIdentity()) { 909 view.getMatrix().mapPoints(position); 910 } 911 912 position[0] += view.getLeft(); 913 position[1] += view.getTop(); 914 915 final ViewParent parent = view.getParent(); 916 if (parent instanceof View) { 917 view = (View) parent; 918 } else { 919 // We've reached the ViewRoot, stop iterating 920 view = null; 921 } 922 } 923 } 924 925 // We've been able to walk up the view hierarchy and the position was never clipped 926 return true; 927 } 928 929 private boolean isOffsetVisible(int offset) { 930 Layout layout = mTextView.getLayout(); 931 if (layout == null) return false; 932 933 final int line = layout.getLineForOffset(offset); 934 final int lineBottom = layout.getLineBottom(line); 935 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 936 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 937 lineBottom + mTextView.viewportToContentVerticalOffset()); 938 } 939 940 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 941 * in the view. Returns false when the position is in the empty space of left/right of text. 942 */ 943 private boolean isPositionOnText(float x, float y) { 944 Layout layout = mTextView.getLayout(); 945 if (layout == null) return false; 946 947 final int line = mTextView.getLineAtCoordinate(y); 948 x = mTextView.convertToLocalHorizontalCoordinate(x); 949 950 if (x < layout.getLineLeft(line)) return false; 951 if (x > layout.getLineRight(line)) return false; 952 return true; 953 } 954 955 public boolean performLongClick(boolean handled) { 956 // Long press in empty space moves cursor and starts the selection action mode. 957 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 958 mInsertionControllerEnabled) { 959 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 960 mLastDownPositionY); 961 stopSelectionActionMode(); 962 Selection.setSelection((Spannable) mTextView.getText(), offset); 963 getInsertionController().show(); 964 startSelectionActionModeWithoutSelection(); 965 handled = true; 966 } 967 968 if (!handled && mSelectionActionMode != null) { 969 if (touchPositionIsInSelection()) { 970 // Start a drag 971 final int start = mTextView.getSelectionStart(); 972 final int end = mTextView.getSelectionEnd(); 973 CharSequence selectedText = mTextView.getTransformedText(start, end); 974 ClipData data = ClipData.newPlainText(null, selectedText); 975 DragLocalState localState = new DragLocalState(mTextView, start, end); 976 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 977 View.DRAG_FLAG_GLOBAL); 978 stopSelectionActionMode(); 979 } else { 980 stopSelectionActionMode(); 981 startSelectionActionModeWithSelectionAndStartDrag(); 982 } 983 handled = true; 984 } 985 986 // Start a new selection 987 if (!handled) { 988 handled = startSelectionActionModeWithSelectionAndStartDrag(); 989 } 990 991 return handled; 992 } 993 994 private long getLastTouchOffsets() { 995 SelectionModifierCursorController selectionController = getSelectionController(); 996 final int minOffset = selectionController.getMinTouchOffset(); 997 final int maxOffset = selectionController.getMaxTouchOffset(); 998 return TextUtils.packRangeInLong(minOffset, maxOffset); 999 } 1000 1001 void onFocusChanged(boolean focused, int direction) { 1002 mShowCursor = SystemClock.uptimeMillis(); 1003 ensureEndedBatchEdit(); 1004 1005 if (focused) { 1006 int selStart = mTextView.getSelectionStart(); 1007 int selEnd = mTextView.getSelectionEnd(); 1008 1009 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1010 // mode for these, unless there was a specific selection already started. 1011 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1012 selEnd == mTextView.getText().length(); 1013 1014 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1015 !isFocusHighlighted; 1016 1017 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1018 // If a tap was used to give focus to that view, move cursor at tap position. 1019 // Has to be done before onTakeFocus, which can be overloaded. 1020 final int lastTapPosition = getLastTapPosition(); 1021 if (lastTapPosition >= 0) { 1022 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1023 } 1024 1025 // Note this may have to be moved out of the Editor class 1026 MovementMethod mMovement = mTextView.getMovementMethod(); 1027 if (mMovement != null) { 1028 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1029 } 1030 1031 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1032 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1033 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1034 // This special case ensure that we keep current selection in that case. 1035 // It would be better to know why the DecorView does not have focus at that time. 1036 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1037 selStart >= 0 && selEnd >= 0) { 1038 /* 1039 * Someone intentionally set the selection, so let them 1040 * do whatever it is that they wanted to do instead of 1041 * the default on-focus behavior. We reset the selection 1042 * here instead of just skipping the onTakeFocus() call 1043 * because some movement methods do something other than 1044 * just setting the selection in theirs and we still 1045 * need to go through that path. 1046 */ 1047 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1048 } 1049 1050 if (mSelectAllOnFocus) { 1051 mTextView.selectAllText(); 1052 } 1053 1054 mTouchFocusSelected = true; 1055 } 1056 1057 mFrozenWithFocus = false; 1058 mSelectionMoved = false; 1059 1060 if (mError != null) { 1061 showError(); 1062 } 1063 1064 makeBlink(); 1065 } else { 1066 if (mError != null) { 1067 hideError(); 1068 } 1069 // Don't leave us in the middle of a batch edit. 1070 mTextView.onEndBatchEdit(); 1071 1072 if (mTextView instanceof ExtractEditText) { 1073 // terminateTextSelectionMode removes selection, which we want to keep when 1074 // ExtractEditText goes out of focus. 1075 final int selStart = mTextView.getSelectionStart(); 1076 final int selEnd = mTextView.getSelectionEnd(); 1077 hideControllers(); 1078 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1079 } else { 1080 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1081 hideControllers(); 1082 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1083 downgradeEasyCorrectionSpans(); 1084 } 1085 1086 // No need to create the controller 1087 if (mSelectionModifierCursorController != null) { 1088 mSelectionModifierCursorController.resetTouchOffsets(); 1089 } 1090 } 1091 } 1092 1093 /** 1094 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1095 * span. 1096 */ 1097 private void downgradeEasyCorrectionSpans() { 1098 CharSequence text = mTextView.getText(); 1099 if (text instanceof Spannable) { 1100 Spannable spannable = (Spannable) text; 1101 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1102 spannable.length(), SuggestionSpan.class); 1103 for (int i = 0; i < suggestionSpans.length; i++) { 1104 int flags = suggestionSpans[i].getFlags(); 1105 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1106 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1107 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1108 suggestionSpans[i].setFlags(flags); 1109 } 1110 } 1111 } 1112 } 1113 1114 void sendOnTextChanged(int start, int after) { 1115 updateSpellCheckSpans(start, start + after, false); 1116 1117 // Flip flag to indicate the word iterator needs to have the text reset. 1118 mUpdateWordIteratorText = true; 1119 1120 // Hide the controllers as soon as text is modified (typing, procedural...) 1121 // We do not hide the span controllers, since they can be added when a new text is 1122 // inserted into the text view (voice IME). 1123 hideCursorControllers(); 1124 } 1125 1126 private int getLastTapPosition() { 1127 // No need to create the controller at that point, no last tap position saved 1128 if (mSelectionModifierCursorController != null) { 1129 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1130 if (lastTapPosition >= 0) { 1131 // Safety check, should not be possible. 1132 if (lastTapPosition > mTextView.getText().length()) { 1133 lastTapPosition = mTextView.getText().length(); 1134 } 1135 return lastTapPosition; 1136 } 1137 } 1138 1139 return -1; 1140 } 1141 1142 void onWindowFocusChanged(boolean hasWindowFocus) { 1143 if (hasWindowFocus) { 1144 if (mBlink != null) { 1145 mBlink.uncancel(); 1146 makeBlink(); 1147 } 1148 } else { 1149 if (mBlink != null) { 1150 mBlink.cancel(); 1151 } 1152 if (mInputContentType != null) { 1153 mInputContentType.enterDown = false; 1154 } 1155 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1156 hideControllers(); 1157 if (mSuggestionsPopupWindow != null) { 1158 mSuggestionsPopupWindow.onParentLostFocus(); 1159 } 1160 1161 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1162 ensureEndedBatchEdit(); 1163 } 1164 } 1165 1166 void onTouchEvent(MotionEvent event) { 1167 if (hasSelectionController()) { 1168 getSelectionController().onTouchEvent(event); 1169 } 1170 1171 if (mShowSuggestionRunnable != null) { 1172 mTextView.removeCallbacks(mShowSuggestionRunnable); 1173 mShowSuggestionRunnable = null; 1174 } 1175 1176 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1177 mLastDownPositionX = event.getX(); 1178 mLastDownPositionY = event.getY(); 1179 1180 // Reset this state; it will be re-set if super.onTouchEvent 1181 // causes focus to move to the view. 1182 mTouchFocusSelected = false; 1183 mIgnoreActionUpEvent = false; 1184 } 1185 } 1186 1187 public void beginBatchEdit() { 1188 mInBatchEditControllers = true; 1189 final InputMethodState ims = mInputMethodState; 1190 if (ims != null) { 1191 int nesting = ++ims.mBatchEditNesting; 1192 if (nesting == 1) { 1193 ims.mCursorChanged = false; 1194 ims.mChangedDelta = 0; 1195 if (ims.mContentChanged) { 1196 // We already have a pending change from somewhere else, 1197 // so turn this into a full update. 1198 ims.mChangedStart = 0; 1199 ims.mChangedEnd = mTextView.getText().length(); 1200 } else { 1201 ims.mChangedStart = EXTRACT_UNKNOWN; 1202 ims.mChangedEnd = EXTRACT_UNKNOWN; 1203 ims.mContentChanged = false; 1204 } 1205 mUndoInputFilter.beginBatchEdit(); 1206 mTextView.onBeginBatchEdit(); 1207 } 1208 } 1209 } 1210 1211 public void endBatchEdit() { 1212 mInBatchEditControllers = false; 1213 final InputMethodState ims = mInputMethodState; 1214 if (ims != null) { 1215 int nesting = --ims.mBatchEditNesting; 1216 if (nesting == 0) { 1217 finishBatchEdit(ims); 1218 } 1219 } 1220 } 1221 1222 void ensureEndedBatchEdit() { 1223 final InputMethodState ims = mInputMethodState; 1224 if (ims != null && ims.mBatchEditNesting != 0) { 1225 ims.mBatchEditNesting = 0; 1226 finishBatchEdit(ims); 1227 } 1228 } 1229 1230 void finishBatchEdit(final InputMethodState ims) { 1231 mTextView.onEndBatchEdit(); 1232 mUndoInputFilter.endBatchEdit(); 1233 1234 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1235 mTextView.updateAfterEdit(); 1236 reportExtractedText(); 1237 } else if (ims.mCursorChanged) { 1238 // Cheesy way to get us to report the current cursor location. 1239 mTextView.invalidateCursor(); 1240 } 1241 // sendUpdateSelection knows to avoid sending if the selection did 1242 // not actually change. 1243 sendUpdateSelection(); 1244 } 1245 1246 static final int EXTRACT_NOTHING = -2; 1247 static final int EXTRACT_UNKNOWN = -1; 1248 1249 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1250 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1251 EXTRACT_UNKNOWN, outText); 1252 } 1253 1254 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1255 int partialStartOffset, int partialEndOffset, int delta, 1256 @Nullable ExtractedText outText) { 1257 if (request == null || outText == null) { 1258 return false; 1259 } 1260 1261 final CharSequence content = mTextView.getText(); 1262 if (content == null) { 1263 return false; 1264 } 1265 1266 if (partialStartOffset != EXTRACT_NOTHING) { 1267 final int N = content.length(); 1268 if (partialStartOffset < 0) { 1269 outText.partialStartOffset = outText.partialEndOffset = -1; 1270 partialStartOffset = 0; 1271 partialEndOffset = N; 1272 } else { 1273 // Now use the delta to determine the actual amount of text 1274 // we need. 1275 partialEndOffset += delta; 1276 // Adjust offsets to ensure we contain full spans. 1277 if (content instanceof Spanned) { 1278 Spanned spanned = (Spanned)content; 1279 Object[] spans = spanned.getSpans(partialStartOffset, 1280 partialEndOffset, ParcelableSpan.class); 1281 int i = spans.length; 1282 while (i > 0) { 1283 i--; 1284 int j = spanned.getSpanStart(spans[i]); 1285 if (j < partialStartOffset) partialStartOffset = j; 1286 j = spanned.getSpanEnd(spans[i]); 1287 if (j > partialEndOffset) partialEndOffset = j; 1288 } 1289 } 1290 outText.partialStartOffset = partialStartOffset; 1291 outText.partialEndOffset = partialEndOffset - delta; 1292 1293 if (partialStartOffset > N) { 1294 partialStartOffset = N; 1295 } else if (partialStartOffset < 0) { 1296 partialStartOffset = 0; 1297 } 1298 if (partialEndOffset > N) { 1299 partialEndOffset = N; 1300 } else if (partialEndOffset < 0) { 1301 partialEndOffset = 0; 1302 } 1303 } 1304 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1305 outText.text = content.subSequence(partialStartOffset, 1306 partialEndOffset); 1307 } else { 1308 outText.text = TextUtils.substring(content, partialStartOffset, 1309 partialEndOffset); 1310 } 1311 } else { 1312 outText.partialStartOffset = 0; 1313 outText.partialEndOffset = 0; 1314 outText.text = ""; 1315 } 1316 outText.flags = 0; 1317 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1318 outText.flags |= ExtractedText.FLAG_SELECTING; 1319 } 1320 if (mTextView.isSingleLine()) { 1321 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1322 } 1323 outText.startOffset = 0; 1324 outText.selectionStart = mTextView.getSelectionStart(); 1325 outText.selectionEnd = mTextView.getSelectionEnd(); 1326 return true; 1327 } 1328 1329 boolean reportExtractedText() { 1330 final Editor.InputMethodState ims = mInputMethodState; 1331 if (ims != null) { 1332 final boolean contentChanged = ims.mContentChanged; 1333 if (contentChanged || ims.mSelectionModeChanged) { 1334 ims.mContentChanged = false; 1335 ims.mSelectionModeChanged = false; 1336 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1337 if (req != null) { 1338 InputMethodManager imm = InputMethodManager.peekInstance(); 1339 if (imm != null) { 1340 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1341 "Retrieving extracted start=" + ims.mChangedStart + 1342 " end=" + ims.mChangedEnd + 1343 " delta=" + ims.mChangedDelta); 1344 if (ims.mChangedStart < 0 && !contentChanged) { 1345 ims.mChangedStart = EXTRACT_NOTHING; 1346 } 1347 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1348 ims.mChangedDelta, ims.mExtractedText)) { 1349 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1350 "Reporting extracted start=" + 1351 ims.mExtractedText.partialStartOffset + 1352 " end=" + ims.mExtractedText.partialEndOffset + 1353 ": " + ims.mExtractedText.text); 1354 1355 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1356 ims.mChangedStart = EXTRACT_UNKNOWN; 1357 ims.mChangedEnd = EXTRACT_UNKNOWN; 1358 ims.mChangedDelta = 0; 1359 ims.mContentChanged = false; 1360 return true; 1361 } 1362 } 1363 } 1364 } 1365 } 1366 return false; 1367 } 1368 1369 private void sendUpdateSelection() { 1370 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1371 final InputMethodManager imm = InputMethodManager.peekInstance(); 1372 if (null != imm) { 1373 final int selectionStart = mTextView.getSelectionStart(); 1374 final int selectionEnd = mTextView.getSelectionEnd(); 1375 int candStart = -1; 1376 int candEnd = -1; 1377 if (mTextView.getText() instanceof Spannable) { 1378 final Spannable sp = (Spannable) mTextView.getText(); 1379 candStart = EditableInputConnection.getComposingSpanStart(sp); 1380 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1381 } 1382 // InputMethodManager#updateSelection skips sending the message if 1383 // none of the parameters have changed since the last time we called it. 1384 imm.updateSelection(mTextView, 1385 selectionStart, selectionEnd, candStart, candEnd); 1386 } 1387 } 1388 } 1389 1390 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1391 int cursorOffsetVertical) { 1392 final int selectionStart = mTextView.getSelectionStart(); 1393 final int selectionEnd = mTextView.getSelectionEnd(); 1394 1395 final InputMethodState ims = mInputMethodState; 1396 if (ims != null && ims.mBatchEditNesting == 0) { 1397 InputMethodManager imm = InputMethodManager.peekInstance(); 1398 if (imm != null) { 1399 if (imm.isActive(mTextView)) { 1400 boolean reported = false; 1401 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1402 // We are in extract mode and the content has changed 1403 // in some way... just report complete new text to the 1404 // input method. 1405 reported = reportExtractedText(); 1406 } 1407 } 1408 } 1409 } 1410 1411 if (mCorrectionHighlighter != null) { 1412 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1413 } 1414 1415 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1416 drawCursor(canvas, cursorOffsetVertical); 1417 // Rely on the drawable entirely, do not draw the cursor line. 1418 // Has to be done after the IMM related code above which relies on the highlight. 1419 highlight = null; 1420 } 1421 1422 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1423 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1424 cursorOffsetVertical); 1425 } else { 1426 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1427 } 1428 } 1429 1430 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1431 Paint highlightPaint, int cursorOffsetVertical) { 1432 final long lineRange = layout.getLineRangeForDraw(canvas); 1433 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1434 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1435 if (lastLine < 0) return; 1436 1437 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1438 firstLine, lastLine); 1439 1440 if (layout instanceof DynamicLayout) { 1441 if (mTextDisplayLists == null) { 1442 mTextDisplayLists = ArrayUtils.emptyArray(TextDisplayList.class); 1443 } 1444 1445 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1446 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1447 int[] blockIndices = dynamicLayout.getBlockIndices(); 1448 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1449 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1450 1451 int endOfPreviousBlock = -1; 1452 int searchStartIndex = 0; 1453 for (int i = 0; i < numberOfBlocks; i++) { 1454 int blockEndLine = blockEndLines[i]; 1455 int blockIndex = blockIndices[i]; 1456 1457 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1458 if (blockIsInvalid) { 1459 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1460 searchStartIndex); 1461 // Note how dynamic layout's internal block indices get updated from Editor 1462 blockIndices[i] = blockIndex; 1463 if (mTextDisplayLists[blockIndex] != null) { 1464 mTextDisplayLists[blockIndex].isDirty = true; 1465 } 1466 searchStartIndex = blockIndex + 1; 1467 } 1468 1469 if (mTextDisplayLists[blockIndex] == null) { 1470 mTextDisplayLists[blockIndex] = 1471 new TextDisplayList("Text " + blockIndex); 1472 } 1473 1474 final boolean blockDisplayListIsInvalid = mTextDisplayLists[blockIndex].needsRecord(); 1475 RenderNode blockDisplayList = mTextDisplayLists[blockIndex].displayList; 1476 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1477 final int blockBeginLine = endOfPreviousBlock + 1; 1478 final int top = layout.getLineTop(blockBeginLine); 1479 final int bottom = layout.getLineBottom(blockEndLine); 1480 int left = 0; 1481 int right = mTextView.getWidth(); 1482 if (mTextView.getHorizontallyScrolling()) { 1483 float min = Float.MAX_VALUE; 1484 float max = Float.MIN_VALUE; 1485 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1486 min = Math.min(min, layout.getLineLeft(line)); 1487 max = Math.max(max, layout.getLineRight(line)); 1488 } 1489 left = (int) min; 1490 right = (int) (max + 0.5f); 1491 } 1492 1493 // Rebuild display list if it is invalid 1494 if (blockDisplayListIsInvalid) { 1495 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1496 right - left, bottom - top); 1497 try { 1498 // drawText is always relative to TextView's origin, this translation 1499 // brings this range of text back to the top left corner of the viewport 1500 displayListCanvas.translate(-left, -top); 1501 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1502 mTextDisplayLists[blockIndex].isDirty = false; 1503 // No need to untranslate, previous context is popped after 1504 // drawDisplayList 1505 } finally { 1506 blockDisplayList.end(displayListCanvas); 1507 // Same as drawDisplayList below, handled by our TextView's parent 1508 blockDisplayList.setClipToBounds(false); 1509 } 1510 } 1511 1512 // Valid disply list whose index is >= indexFirstChangedBlock 1513 // only needs to update its drawing location. 1514 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1515 } 1516 1517 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList, 1518 0 /* no child clipping, our TextView parent enforces it */); 1519 1520 endOfPreviousBlock = blockEndLine; 1521 } 1522 1523 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1524 } else { 1525 // Boring layout is used for empty and hint text 1526 layout.drawText(canvas, firstLine, lastLine); 1527 } 1528 } 1529 1530 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1531 int searchStartIndex) { 1532 int length = mTextDisplayLists.length; 1533 for (int i = searchStartIndex; i < length; i++) { 1534 boolean blockIndexFound = false; 1535 for (int j = 0; j < numberOfBlocks; j++) { 1536 if (blockIndices[j] == i) { 1537 blockIndexFound = true; 1538 break; 1539 } 1540 } 1541 if (blockIndexFound) continue; 1542 return i; 1543 } 1544 1545 // No available index found, the pool has to grow 1546 mTextDisplayLists = GrowingArrayUtils.append(mTextDisplayLists, length, null); 1547 return length; 1548 } 1549 1550 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1551 final boolean translate = cursorOffsetVertical != 0; 1552 if (translate) canvas.translate(0, cursorOffsetVertical); 1553 for (int i = 0; i < mCursorCount; i++) { 1554 mCursorDrawable[i].draw(canvas); 1555 } 1556 if (translate) canvas.translate(0, -cursorOffsetVertical); 1557 } 1558 1559 /** 1560 * Invalidates all the sub-display lists that overlap the specified character range 1561 */ 1562 void invalidateTextDisplayList(Layout layout, int start, int end) { 1563 if (mTextDisplayLists != null && layout instanceof DynamicLayout) { 1564 final int firstLine = layout.getLineForOffset(start); 1565 final int lastLine = layout.getLineForOffset(end); 1566 1567 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1568 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1569 int[] blockIndices = dynamicLayout.getBlockIndices(); 1570 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1571 1572 int i = 0; 1573 // Skip the blocks before firstLine 1574 while (i < numberOfBlocks) { 1575 if (blockEndLines[i] >= firstLine) break; 1576 i++; 1577 } 1578 1579 // Invalidate all subsequent blocks until lastLine is passed 1580 while (i < numberOfBlocks) { 1581 final int blockIndex = blockIndices[i]; 1582 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1583 mTextDisplayLists[blockIndex].isDirty = true; 1584 } 1585 if (blockEndLines[i] >= lastLine) break; 1586 i++; 1587 } 1588 } 1589 } 1590 1591 void invalidateTextDisplayList() { 1592 if (mTextDisplayLists != null) { 1593 for (int i = 0; i < mTextDisplayLists.length; i++) { 1594 if (mTextDisplayLists[i] != null) mTextDisplayLists[i].isDirty = true; 1595 } 1596 } 1597 } 1598 1599 void updateCursorsPositions() { 1600 if (mTextView.mCursorDrawableRes == 0) { 1601 mCursorCount = 0; 1602 return; 1603 } 1604 1605 Layout layout = mTextView.getLayout(); 1606 Layout hintLayout = mTextView.getHintLayout(); 1607 final int offset = mTextView.getSelectionStart(); 1608 final int line = layout.getLineForOffset(offset); 1609 final int top = layout.getLineTop(line); 1610 final int bottom = layout.getLineTop(line + 1); 1611 1612 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1613 1614 int middle = bottom; 1615 if (mCursorCount == 2) { 1616 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1617 middle = (top + bottom) >> 1; 1618 } 1619 1620 boolean clamped = layout.shouldClampCursor(line); 1621 updateCursorPosition(0, top, middle, 1622 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1623 1624 if (mCursorCount == 2) { 1625 updateCursorPosition(1, middle, bottom, 1626 layout.getSecondaryHorizontal(offset, clamped)); 1627 } 1628 } 1629 1630 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1631 boolean clamped) { 1632 if (TextUtils.isEmpty(layout.getText()) && 1633 hintLayout != null && 1634 !TextUtils.isEmpty(hintLayout.getText())) { 1635 return hintLayout.getPrimaryHorizontal(offset, clamped); 1636 } else { 1637 return layout.getPrimaryHorizontal(offset, clamped); 1638 } 1639 } 1640 1641 /** 1642 * @return true if the selection mode was actually started. 1643 */ 1644 private boolean startSelectionActionModeWithoutSelection() { 1645 if (mSelectionActionMode != null) { 1646 // Selection action mode is already started 1647 // TODO: revisit invocations to minimize this case. 1648 mSelectionActionMode.invalidate(); 1649 return false; 1650 } 1651 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1652 mSelectionActionMode = mTextView.startActionMode( 1653 actionModeCallback, ActionMode.TYPE_FLOATING); 1654 return mSelectionActionMode != null; 1655 } 1656 1657 /** 1658 * Starts a Selection Action Mode with the current selection and enters drag mode. This should 1659 * be used whenever the mode is started from a touch event. 1660 * 1661 * @return true if the selection mode was actually started. 1662 */ 1663 private boolean startSelectionActionModeWithSelectionAndStartDrag() { 1664 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1665 if (selectionStarted) { 1666 getSelectionController().enterDrag(); 1667 } 1668 return selectionStarted; 1669 } 1670 1671 /** 1672 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1673 * are shown. This should be used when the mode is started from a non-touch event. 1674 * 1675 * @return true if the selection mode was actually started. 1676 */ 1677 boolean startSelectionActionModeWithSelection() { 1678 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1679 if (selectionStarted) { 1680 getSelectionController().show(); 1681 } 1682 return selectionStarted; 1683 } 1684 1685 private boolean startSelectionActionModeWithSelectionInternal() { 1686 if (mSelectionActionMode != null) { 1687 // Selection action mode is already started 1688 mSelectionActionMode.invalidate(); 1689 return false; 1690 } 1691 1692 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1693 Log.w(TextView.LOG_TAG, 1694 "TextView does not support text selection. Action mode cancelled."); 1695 return false; 1696 } 1697 1698 if (!mTextView.hasSelection()) { 1699 // There may already be a selection on device rotation 1700 if (!selectCurrentWord()) { 1701 // No word found under cursor or text selection not permitted. 1702 return false; 1703 } 1704 } 1705 1706 boolean willExtract = extractedTextModeWillBeStarted(); 1707 1708 // Do not start the action mode when extracted text will show up full screen, which would 1709 // immediately hide the newly created action bar and would be visually distracting. 1710 if (!willExtract) { 1711 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1712 mSelectionActionMode = mTextView.startActionMode( 1713 actionModeCallback, ActionMode.TYPE_FLOATING); 1714 } 1715 1716 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1717 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1718 // Show the IME to be able to replace text, except when selecting non editable text. 1719 final InputMethodManager imm = InputMethodManager.peekInstance(); 1720 if (imm != null) { 1721 imm.showSoftInput(mTextView, 0, null); 1722 } 1723 } 1724 return selectionStarted; 1725 } 1726 1727 private boolean extractedTextModeWillBeStarted() { 1728 if (!(mTextView instanceof ExtractEditText)) { 1729 final InputMethodManager imm = InputMethodManager.peekInstance(); 1730 return imm != null && imm.isFullscreenMode(); 1731 } 1732 return false; 1733 } 1734 1735 /** 1736 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1737 * the current cursor position or selection range. This method is consistent with the 1738 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1739 */ 1740 private boolean shouldOfferToShowSuggestions() { 1741 CharSequence text = mTextView.getText(); 1742 if (!(text instanceof Spannable)) return false; 1743 1744 final Spannable spannable = (Spannable) text; 1745 final int selectionStart = mTextView.getSelectionStart(); 1746 final int selectionEnd = mTextView.getSelectionEnd(); 1747 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1748 SuggestionSpan.class); 1749 if (suggestionSpans.length == 0) { 1750 return false; 1751 } 1752 if (selectionStart == selectionEnd) { 1753 // Spans overlap the cursor. 1754 return true; 1755 } 1756 int minSpanStart = mTextView.getText().length(); 1757 int maxSpanEnd = 0; 1758 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1759 int unionOfSpansCoveringSelectionStartEnd = 0; 1760 for (int i = 0; i < suggestionSpans.length; i++) { 1761 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1762 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1763 minSpanStart = Math.min(minSpanStart, spanStart); 1764 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1765 if (selectionStart < spanStart || selectionStart > spanEnd) { 1766 // The span doesn't cover the current selection start point. 1767 continue; 1768 } 1769 unionOfSpansCoveringSelectionStartStart = 1770 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1771 unionOfSpansCoveringSelectionStartEnd = 1772 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1773 } 1774 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1775 // No spans cover the selection start point. 1776 return false; 1777 } 1778 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1779 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1780 // There is a span that is not covered by the union. In this case, we soouldn't offer 1781 // to show suggestions as it's confusing. 1782 return false; 1783 } 1784 return true; 1785 } 1786 1787 /** 1788 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1789 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1790 */ 1791 private boolean isCursorInsideEasyCorrectionSpan() { 1792 Spannable spannable = (Spannable) mTextView.getText(); 1793 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1794 mTextView.getSelectionEnd(), SuggestionSpan.class); 1795 for (int i = 0; i < suggestionSpans.length; i++) { 1796 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1797 return true; 1798 } 1799 } 1800 return false; 1801 } 1802 1803 void onTouchUpEvent(MotionEvent event) { 1804 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1805 hideControllers(); 1806 CharSequence text = mTextView.getText(); 1807 if (!selectAllGotFocus && text.length() > 0) { 1808 // Move cursor 1809 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1810 Selection.setSelection((Spannable) text, offset); 1811 if (mSpellChecker != null) { 1812 // When the cursor moves, the word that was typed may need spell check 1813 mSpellChecker.onSelectionChanged(); 1814 } 1815 if (!extractedTextModeWillBeStarted()) { 1816 if (isCursorInsideEasyCorrectionSpan()) { 1817 mShowSuggestionRunnable = new Runnable() { 1818 public void run() { 1819 showSuggestions(); 1820 } 1821 }; 1822 // removeCallbacks is performed on every touch 1823 mTextView.postDelayed(mShowSuggestionRunnable, 1824 ViewConfiguration.getDoubleTapTimeout()); 1825 } else if (hasInsertionController()) { 1826 getInsertionController().show(); 1827 } 1828 } 1829 } 1830 } 1831 1832 protected void stopSelectionActionMode() { 1833 if (mSelectionActionMode != null) { 1834 // This will hide the mSelectionModifierCursorController 1835 mSelectionActionMode.finish(); 1836 } 1837 } 1838 1839 /** 1840 * @return True if this view supports insertion handles. 1841 */ 1842 boolean hasInsertionController() { 1843 return mInsertionControllerEnabled; 1844 } 1845 1846 /** 1847 * @return True if this view supports selection handles. 1848 */ 1849 boolean hasSelectionController() { 1850 return mSelectionControllerEnabled; 1851 } 1852 1853 InsertionPointCursorController getInsertionController() { 1854 if (!mInsertionControllerEnabled) { 1855 return null; 1856 } 1857 1858 if (mInsertionPointCursorController == null) { 1859 mInsertionPointCursorController = new InsertionPointCursorController(); 1860 1861 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1862 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1863 } 1864 1865 return mInsertionPointCursorController; 1866 } 1867 1868 SelectionModifierCursorController getSelectionController() { 1869 if (!mSelectionControllerEnabled) { 1870 return null; 1871 } 1872 1873 if (mSelectionModifierCursorController == null) { 1874 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1875 1876 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1877 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1878 } 1879 1880 return mSelectionModifierCursorController; 1881 } 1882 1883 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1884 if (mCursorDrawable[cursorIndex] == null) 1885 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1886 mTextView.mCursorDrawableRes); 1887 1888 if (mTempRect == null) mTempRect = new Rect(); 1889 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1890 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1891 horizontal = Math.max(0.5f, horizontal - 0.5f); 1892 final int left = (int) (horizontal) - mTempRect.left; 1893 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1894 bottom + mTempRect.bottom); 1895 } 1896 1897 /** 1898 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1899 * a dictionary) from the current input method, provided by it calling 1900 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1901 * implementation flashes the background of the corrected word to provide feedback to the user. 1902 * 1903 * @param info The auto correct info about the text that was corrected. 1904 */ 1905 public void onCommitCorrection(CorrectionInfo info) { 1906 if (mCorrectionHighlighter == null) { 1907 mCorrectionHighlighter = new CorrectionHighlighter(); 1908 } else { 1909 mCorrectionHighlighter.invalidate(false); 1910 } 1911 1912 mCorrectionHighlighter.highlight(info); 1913 } 1914 1915 void showSuggestions() { 1916 if (mSuggestionsPopupWindow == null) { 1917 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1918 } 1919 hideControllers(); 1920 mSuggestionsPopupWindow.show(); 1921 } 1922 1923 boolean areSuggestionsShown() { 1924 return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing(); 1925 } 1926 1927 void onScrollChanged() { 1928 if (mPositionListener != null) { 1929 mPositionListener.onScrollChanged(); 1930 } 1931 if (mSelectionActionMode != null) { 1932 mSelectionActionMode.invalidateContentRect(); 1933 } 1934 } 1935 1936 /** 1937 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1938 */ 1939 private boolean shouldBlink() { 1940 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1941 1942 final int start = mTextView.getSelectionStart(); 1943 if (start < 0) return false; 1944 1945 final int end = mTextView.getSelectionEnd(); 1946 if (end < 0) return false; 1947 1948 return start == end; 1949 } 1950 1951 void makeBlink() { 1952 if (shouldBlink()) { 1953 mShowCursor = SystemClock.uptimeMillis(); 1954 if (mBlink == null) mBlink = new Blink(); 1955 mBlink.removeCallbacks(mBlink); 1956 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 1957 } else { 1958 if (mBlink != null) mBlink.removeCallbacks(mBlink); 1959 } 1960 } 1961 1962 private class Blink extends Handler implements Runnable { 1963 private boolean mCancelled; 1964 1965 public void run() { 1966 if (mCancelled) { 1967 return; 1968 } 1969 1970 removeCallbacks(Blink.this); 1971 1972 if (shouldBlink()) { 1973 if (mTextView.getLayout() != null) { 1974 mTextView.invalidateCursorPath(); 1975 } 1976 1977 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 1978 } 1979 } 1980 1981 void cancel() { 1982 if (!mCancelled) { 1983 removeCallbacks(Blink.this); 1984 mCancelled = true; 1985 } 1986 } 1987 1988 void uncancel() { 1989 mCancelled = false; 1990 } 1991 } 1992 1993 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 1994 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 1995 com.android.internal.R.layout.text_drag_thumbnail, null); 1996 1997 if (shadowView == null) { 1998 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 1999 } 2000 2001 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2002 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2003 } 2004 shadowView.setText(text); 2005 shadowView.setTextColor(mTextView.getTextColors()); 2006 2007 shadowView.setTextAppearance(mTextView.getContext(), R.styleable.Theme_textAppearanceLarge); 2008 shadowView.setGravity(Gravity.CENTER); 2009 2010 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2011 ViewGroup.LayoutParams.WRAP_CONTENT)); 2012 2013 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2014 shadowView.measure(size, size); 2015 2016 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2017 shadowView.invalidate(); 2018 return new DragShadowBuilder(shadowView); 2019 } 2020 2021 private static class DragLocalState { 2022 public TextView sourceTextView; 2023 public int start, end; 2024 2025 public DragLocalState(TextView sourceTextView, int start, int end) { 2026 this.sourceTextView = sourceTextView; 2027 this.start = start; 2028 this.end = end; 2029 } 2030 } 2031 2032 void onDrop(DragEvent event) { 2033 StringBuilder content = new StringBuilder(""); 2034 ClipData clipData = event.getClipData(); 2035 final int itemCount = clipData.getItemCount(); 2036 for (int i=0; i < itemCount; i++) { 2037 Item item = clipData.getItemAt(i); 2038 content.append(item.coerceToStyledText(mTextView.getContext())); 2039 } 2040 2041 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2042 2043 Object localState = event.getLocalState(); 2044 DragLocalState dragLocalState = null; 2045 if (localState instanceof DragLocalState) { 2046 dragLocalState = (DragLocalState) localState; 2047 } 2048 boolean dragDropIntoItself = dragLocalState != null && 2049 dragLocalState.sourceTextView == mTextView; 2050 2051 if (dragDropIntoItself) { 2052 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2053 // A drop inside the original selection discards the drop. 2054 return; 2055 } 2056 } 2057 2058 final int originalLength = mTextView.getText().length(); 2059 int min = offset; 2060 int max = offset; 2061 2062 Selection.setSelection((Spannable) mTextView.getText(), max); 2063 mTextView.replaceText_internal(min, max, content); 2064 2065 if (dragDropIntoItself) { 2066 int dragSourceStart = dragLocalState.start; 2067 int dragSourceEnd = dragLocalState.end; 2068 if (max <= dragSourceStart) { 2069 // Inserting text before selection has shifted positions 2070 final int shift = mTextView.getText().length() - originalLength; 2071 dragSourceStart += shift; 2072 dragSourceEnd += shift; 2073 } 2074 2075 // Delete original selection 2076 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2077 2078 // Make sure we do not leave two adjacent spaces. 2079 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2080 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2081 if (nextCharIdx > prevCharIdx + 1) { 2082 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2083 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2084 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2085 } 2086 } 2087 } 2088 } 2089 2090 public void addSpanWatchers(Spannable text) { 2091 final int textLength = text.length(); 2092 2093 if (mKeyListener != null) { 2094 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2095 } 2096 2097 if (mSpanController == null) { 2098 mSpanController = new SpanController(); 2099 } 2100 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2101 } 2102 2103 /** 2104 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2105 * pop-up should be displayed. 2106 * Also monitors {@link Selection} to call back to the attached input method. 2107 */ 2108 class SpanController implements SpanWatcher { 2109 2110 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2111 2112 private EasyEditPopupWindow mPopupWindow; 2113 2114 private Runnable mHidePopup; 2115 2116 // This function is pure but inner classes can't have static functions 2117 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2118 final Object span) { 2119 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2120 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2121 } 2122 2123 @Override 2124 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2125 if (isNonIntermediateSelectionSpan(text, span)) { 2126 sendUpdateSelection(); 2127 } else if (span instanceof EasyEditSpan) { 2128 if (mPopupWindow == null) { 2129 mPopupWindow = new EasyEditPopupWindow(); 2130 mHidePopup = new Runnable() { 2131 @Override 2132 public void run() { 2133 hide(); 2134 } 2135 }; 2136 } 2137 2138 // Make sure there is only at most one EasyEditSpan in the text 2139 if (mPopupWindow.mEasyEditSpan != null) { 2140 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2141 } 2142 2143 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2144 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2145 @Override 2146 public void onDeleteClick(EasyEditSpan span) { 2147 Editable editable = (Editable) mTextView.getText(); 2148 int start = editable.getSpanStart(span); 2149 int end = editable.getSpanEnd(span); 2150 if (start >= 0 && end >= 0) { 2151 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2152 mTextView.deleteText_internal(start, end); 2153 } 2154 editable.removeSpan(span); 2155 } 2156 }); 2157 2158 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2159 // The window is not visible yet, ignore the text change. 2160 return; 2161 } 2162 2163 if (mTextView.getLayout() == null) { 2164 // The view has not been laid out yet, ignore the text change 2165 return; 2166 } 2167 2168 if (extractedTextModeWillBeStarted()) { 2169 // The input is in extract mode. Do not handle the easy edit in 2170 // the original TextView, as the ExtractEditText will do 2171 return; 2172 } 2173 2174 mPopupWindow.show(); 2175 mTextView.removeCallbacks(mHidePopup); 2176 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2177 } 2178 } 2179 2180 @Override 2181 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2182 if (isNonIntermediateSelectionSpan(text, span)) { 2183 sendUpdateSelection(); 2184 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2185 hide(); 2186 } 2187 } 2188 2189 @Override 2190 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2191 int newStart, int newEnd) { 2192 if (isNonIntermediateSelectionSpan(text, span)) { 2193 sendUpdateSelection(); 2194 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2195 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2196 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2197 text.removeSpan(easyEditSpan); 2198 } 2199 } 2200 2201 public void hide() { 2202 if (mPopupWindow != null) { 2203 mPopupWindow.hide(); 2204 mTextView.removeCallbacks(mHidePopup); 2205 } 2206 } 2207 2208 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2209 try { 2210 PendingIntent pendingIntent = span.getPendingIntent(); 2211 if (pendingIntent != null) { 2212 Intent intent = new Intent(); 2213 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2214 pendingIntent.send(mTextView.getContext(), 0, intent); 2215 } 2216 } catch (CanceledException e) { 2217 // This should not happen, as we should try to send the intent only once. 2218 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2219 } 2220 } 2221 } 2222 2223 /** 2224 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2225 */ 2226 private interface EasyEditDeleteListener { 2227 2228 /** 2229 * Clicks the delete pop-up. 2230 */ 2231 void onDeleteClick(EasyEditSpan span); 2232 } 2233 2234 /** 2235 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2236 * by {@link SpanController}. 2237 */ 2238 private class EasyEditPopupWindow extends PinnedPopupWindow 2239 implements OnClickListener { 2240 private static final int POPUP_TEXT_LAYOUT = 2241 com.android.internal.R.layout.text_edit_action_popup_text; 2242 private TextView mDeleteTextView; 2243 private EasyEditSpan mEasyEditSpan; 2244 private EasyEditDeleteListener mOnDeleteListener; 2245 2246 @Override 2247 protected void createPopupWindow() { 2248 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2249 com.android.internal.R.attr.textSelectHandleWindowStyle); 2250 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2251 mPopupWindow.setClippingEnabled(true); 2252 } 2253 2254 @Override 2255 protected void initContentView() { 2256 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2257 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2258 mContentView = linearLayout; 2259 mContentView.setBackgroundResource( 2260 com.android.internal.R.drawable.text_edit_side_paste_window); 2261 2262 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2263 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2264 2265 LayoutParams wrapContent = new LayoutParams( 2266 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2267 2268 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2269 mDeleteTextView.setLayoutParams(wrapContent); 2270 mDeleteTextView.setText(com.android.internal.R.string.delete); 2271 mDeleteTextView.setOnClickListener(this); 2272 mContentView.addView(mDeleteTextView); 2273 } 2274 2275 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2276 mEasyEditSpan = easyEditSpan; 2277 } 2278 2279 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2280 mOnDeleteListener = listener; 2281 } 2282 2283 @Override 2284 public void onClick(View view) { 2285 if (view == mDeleteTextView 2286 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2287 && mOnDeleteListener != null) { 2288 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2289 } 2290 } 2291 2292 @Override 2293 public void hide() { 2294 if (mEasyEditSpan != null) { 2295 mEasyEditSpan.setDeleteEnabled(false); 2296 } 2297 mOnDeleteListener = null; 2298 super.hide(); 2299 } 2300 2301 @Override 2302 protected int getTextOffset() { 2303 // Place the pop-up at the end of the span 2304 Editable editable = (Editable) mTextView.getText(); 2305 return editable.getSpanEnd(mEasyEditSpan); 2306 } 2307 2308 @Override 2309 protected int getVerticalLocalPosition(int line) { 2310 return mTextView.getLayout().getLineBottom(line); 2311 } 2312 2313 @Override 2314 protected int clipVertically(int positionY) { 2315 // As we display the pop-up below the span, no vertical clipping is required. 2316 return positionY; 2317 } 2318 } 2319 2320 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2321 // 3 handles 2322 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2323 // 1 CursorAnchorInfoNotifier 2324 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2325 private TextViewPositionListener[] mPositionListeners = 2326 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2327 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2328 private boolean mPositionHasChanged = true; 2329 // Absolute position of the TextView with respect to its parent window 2330 private int mPositionX, mPositionY; 2331 private int mNumberOfListeners; 2332 private boolean mScrollHasChanged; 2333 final int[] mTempCoords = new int[2]; 2334 2335 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2336 if (mNumberOfListeners == 0) { 2337 updatePosition(); 2338 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2339 vto.addOnPreDrawListener(this); 2340 } 2341 2342 int emptySlotIndex = -1; 2343 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2344 TextViewPositionListener listener = mPositionListeners[i]; 2345 if (listener == positionListener) { 2346 return; 2347 } else if (emptySlotIndex < 0 && listener == null) { 2348 emptySlotIndex = i; 2349 } 2350 } 2351 2352 mPositionListeners[emptySlotIndex] = positionListener; 2353 mCanMove[emptySlotIndex] = canMove; 2354 mNumberOfListeners++; 2355 } 2356 2357 public void removeSubscriber(TextViewPositionListener positionListener) { 2358 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2359 if (mPositionListeners[i] == positionListener) { 2360 mPositionListeners[i] = null; 2361 mNumberOfListeners--; 2362 break; 2363 } 2364 } 2365 2366 if (mNumberOfListeners == 0) { 2367 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2368 vto.removeOnPreDrawListener(this); 2369 } 2370 } 2371 2372 public int getPositionX() { 2373 return mPositionX; 2374 } 2375 2376 public int getPositionY() { 2377 return mPositionY; 2378 } 2379 2380 @Override 2381 public boolean onPreDraw() { 2382 updatePosition(); 2383 2384 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2385 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2386 TextViewPositionListener positionListener = mPositionListeners[i]; 2387 if (positionListener != null) { 2388 positionListener.updatePosition(mPositionX, mPositionY, 2389 mPositionHasChanged, mScrollHasChanged); 2390 } 2391 } 2392 } 2393 2394 mScrollHasChanged = false; 2395 return true; 2396 } 2397 2398 private void updatePosition() { 2399 mTextView.getLocationInWindow(mTempCoords); 2400 2401 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2402 2403 mPositionX = mTempCoords[0]; 2404 mPositionY = mTempCoords[1]; 2405 } 2406 2407 public void onScrollChanged() { 2408 mScrollHasChanged = true; 2409 } 2410 } 2411 2412 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2413 protected PopupWindow mPopupWindow; 2414 protected ViewGroup mContentView; 2415 int mPositionX, mPositionY; 2416 2417 protected abstract void createPopupWindow(); 2418 protected abstract void initContentView(); 2419 protected abstract int getTextOffset(); 2420 protected abstract int getVerticalLocalPosition(int line); 2421 protected abstract int clipVertically(int positionY); 2422 2423 public PinnedPopupWindow() { 2424 createPopupWindow(); 2425 2426 mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 2427 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2428 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2429 2430 initContentView(); 2431 2432 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2433 ViewGroup.LayoutParams.WRAP_CONTENT); 2434 mContentView.setLayoutParams(wrapContent); 2435 2436 mPopupWindow.setContentView(mContentView); 2437 } 2438 2439 public void show() { 2440 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2441 2442 computeLocalPosition(); 2443 2444 final PositionListener positionListener = getPositionListener(); 2445 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2446 } 2447 2448 protected void measureContent() { 2449 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2450 mContentView.measure( 2451 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2452 View.MeasureSpec.AT_MOST), 2453 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2454 View.MeasureSpec.AT_MOST)); 2455 } 2456 2457 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2458 * positioned according to viewportToContentHorizontalOffset. 2459 * 2460 * This method assumes that mContentView has properly been measured from its content. */ 2461 private void computeLocalPosition() { 2462 measureContent(); 2463 final int width = mContentView.getMeasuredWidth(); 2464 final int offset = getTextOffset(); 2465 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2466 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2467 2468 final int line = mTextView.getLayout().getLineForOffset(offset); 2469 mPositionY = getVerticalLocalPosition(line); 2470 mPositionY += mTextView.viewportToContentVerticalOffset(); 2471 } 2472 2473 private void updatePosition(int parentPositionX, int parentPositionY) { 2474 int positionX = parentPositionX + mPositionX; 2475 int positionY = parentPositionY + mPositionY; 2476 2477 positionY = clipVertically(positionY); 2478 2479 // Horizontal clipping 2480 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2481 final int width = mContentView.getMeasuredWidth(); 2482 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2483 positionX = Math.max(0, positionX); 2484 2485 if (isShowing()) { 2486 mPopupWindow.update(positionX, positionY, -1, -1); 2487 } else { 2488 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2489 positionX, positionY); 2490 } 2491 } 2492 2493 public void hide() { 2494 mPopupWindow.dismiss(); 2495 getPositionListener().removeSubscriber(this); 2496 } 2497 2498 @Override 2499 public void updatePosition(int parentPositionX, int parentPositionY, 2500 boolean parentPositionChanged, boolean parentScrolled) { 2501 // Either parentPositionChanged or parentScrolled is true, check if still visible 2502 if (isShowing() && isOffsetVisible(getTextOffset())) { 2503 if (parentScrolled) computeLocalPosition(); 2504 updatePosition(parentPositionX, parentPositionY); 2505 } else { 2506 hide(); 2507 } 2508 } 2509 2510 public boolean isShowing() { 2511 return mPopupWindow.isShowing(); 2512 } 2513 } 2514 2515 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2516 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2517 private static final int ADD_TO_DICTIONARY = -1; 2518 private static final int DELETE_TEXT = -2; 2519 private SuggestionInfo[] mSuggestionInfos; 2520 private int mNumberOfSuggestions; 2521 private boolean mCursorWasVisibleBeforeSuggestions; 2522 private boolean mIsShowingUp = false; 2523 private SuggestionAdapter mSuggestionsAdapter; 2524 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2525 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2526 2527 private class CustomPopupWindow extends PopupWindow { 2528 public CustomPopupWindow(Context context, int defStyleAttr) { 2529 super(context, null, defStyleAttr); 2530 } 2531 2532 @Override 2533 public void dismiss() { 2534 super.dismiss(); 2535 2536 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2537 2538 // Safe cast since show() checks that mTextView.getText() is an Editable 2539 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2540 2541 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2542 if (hasInsertionController()) { 2543 getInsertionController().show(); 2544 } 2545 } 2546 } 2547 2548 public SuggestionsPopupWindow() { 2549 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2550 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2551 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2552 } 2553 2554 @Override 2555 protected void createPopupWindow() { 2556 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2557 com.android.internal.R.attr.textSuggestionsWindowStyle); 2558 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2559 mPopupWindow.setFocusable(true); 2560 mPopupWindow.setClippingEnabled(false); 2561 } 2562 2563 @Override 2564 protected void initContentView() { 2565 ListView listView = new ListView(mTextView.getContext()); 2566 mSuggestionsAdapter = new SuggestionAdapter(); 2567 listView.setAdapter(mSuggestionsAdapter); 2568 listView.setOnItemClickListener(this); 2569 mContentView = listView; 2570 2571 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2572 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2573 for (int i = 0; i < mSuggestionInfos.length; i++) { 2574 mSuggestionInfos[i] = new SuggestionInfo(); 2575 } 2576 } 2577 2578 public boolean isShowingUp() { 2579 return mIsShowingUp; 2580 } 2581 2582 public void onParentLostFocus() { 2583 mIsShowingUp = false; 2584 } 2585 2586 private class SuggestionInfo { 2587 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2588 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2589 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2590 SpannableStringBuilder text = new SpannableStringBuilder(); 2591 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2592 android.R.style.TextAppearance_SuggestionHighlight); 2593 } 2594 2595 private class SuggestionAdapter extends BaseAdapter { 2596 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2597 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2598 2599 @Override 2600 public int getCount() { 2601 return mNumberOfSuggestions; 2602 } 2603 2604 @Override 2605 public Object getItem(int position) { 2606 return mSuggestionInfos[position]; 2607 } 2608 2609 @Override 2610 public long getItemId(int position) { 2611 return position; 2612 } 2613 2614 @Override 2615 public View getView(int position, View convertView, ViewGroup parent) { 2616 TextView textView = (TextView) convertView; 2617 2618 if (textView == null) { 2619 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2620 parent, false); 2621 } 2622 2623 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2624 textView.setText(suggestionInfo.text); 2625 2626 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2627 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2628 textView.setBackgroundColor(Color.TRANSPARENT); 2629 } else { 2630 textView.setBackgroundColor(Color.WHITE); 2631 } 2632 2633 return textView; 2634 } 2635 } 2636 2637 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2638 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2639 final int flag1 = span1.getFlags(); 2640 final int flag2 = span2.getFlags(); 2641 if (flag1 != flag2) { 2642 // The order here should match what is used in updateDrawState 2643 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2644 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2645 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2646 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2647 if (easy1 && !misspelled1) return -1; 2648 if (easy2 && !misspelled2) return 1; 2649 if (misspelled1) return -1; 2650 if (misspelled2) return 1; 2651 } 2652 2653 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2654 } 2655 } 2656 2657 /** 2658 * Returns the suggestion spans that cover the current cursor position. The suggestion 2659 * spans are sorted according to the length of text that they are attached to. 2660 */ 2661 private SuggestionSpan[] getSuggestionSpans() { 2662 int pos = mTextView.getSelectionStart(); 2663 Spannable spannable = (Spannable) mTextView.getText(); 2664 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2665 2666 mSpansLengths.clear(); 2667 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2668 int start = spannable.getSpanStart(suggestionSpan); 2669 int end = spannable.getSpanEnd(suggestionSpan); 2670 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2671 } 2672 2673 // The suggestions are sorted according to their types (easy correction first, then 2674 // misspelled) and to the length of the text that they cover (shorter first). 2675 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2676 return suggestionSpans; 2677 } 2678 2679 @Override 2680 public void show() { 2681 if (!(mTextView.getText() instanceof Editable)) return; 2682 2683 if (updateSuggestions()) { 2684 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2685 mTextView.setCursorVisible(false); 2686 mIsShowingUp = true; 2687 super.show(); 2688 } 2689 } 2690 2691 @Override 2692 protected void measureContent() { 2693 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2694 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2695 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2696 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2697 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2698 2699 int width = 0; 2700 View view = null; 2701 for (int i = 0; i < mNumberOfSuggestions; i++) { 2702 view = mSuggestionsAdapter.getView(i, view, mContentView); 2703 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2704 view.measure(horizontalMeasure, verticalMeasure); 2705 width = Math.max(width, view.getMeasuredWidth()); 2706 } 2707 2708 // Enforce the width based on actual text widths 2709 mContentView.measure( 2710 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2711 verticalMeasure); 2712 2713 Drawable popupBackground = mPopupWindow.getBackground(); 2714 if (popupBackground != null) { 2715 if (mTempRect == null) mTempRect = new Rect(); 2716 popupBackground.getPadding(mTempRect); 2717 width += mTempRect.left + mTempRect.right; 2718 } 2719 mPopupWindow.setWidth(width); 2720 } 2721 2722 @Override 2723 protected int getTextOffset() { 2724 return mTextView.getSelectionStart(); 2725 } 2726 2727 @Override 2728 protected int getVerticalLocalPosition(int line) { 2729 return mTextView.getLayout().getLineBottom(line); 2730 } 2731 2732 @Override 2733 protected int clipVertically(int positionY) { 2734 final int height = mContentView.getMeasuredHeight(); 2735 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2736 return Math.min(positionY, displayMetrics.heightPixels - height); 2737 } 2738 2739 @Override 2740 public void hide() { 2741 super.hide(); 2742 } 2743 2744 private boolean updateSuggestions() { 2745 Spannable spannable = (Spannable) mTextView.getText(); 2746 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2747 2748 final int nbSpans = suggestionSpans.length; 2749 // Suggestions are shown after a delay: the underlying spans may have been removed 2750 if (nbSpans == 0) return false; 2751 2752 mNumberOfSuggestions = 0; 2753 int spanUnionStart = mTextView.getText().length(); 2754 int spanUnionEnd = 0; 2755 2756 SuggestionSpan misspelledSpan = null; 2757 int underlineColor = 0; 2758 2759 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2760 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2761 final int spanStart = spannable.getSpanStart(suggestionSpan); 2762 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2763 spanUnionStart = Math.min(spanStart, spanUnionStart); 2764 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2765 2766 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2767 misspelledSpan = suggestionSpan; 2768 } 2769 2770 // The first span dictates the background color of the highlighted text 2771 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2772 2773 String[] suggestions = suggestionSpan.getSuggestions(); 2774 int nbSuggestions = suggestions.length; 2775 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2776 String suggestion = suggestions[suggestionIndex]; 2777 2778 boolean suggestionIsDuplicate = false; 2779 for (int i = 0; i < mNumberOfSuggestions; i++) { 2780 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2781 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2782 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2783 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2784 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2785 suggestionIsDuplicate = true; 2786 break; 2787 } 2788 } 2789 } 2790 2791 if (!suggestionIsDuplicate) { 2792 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2793 suggestionInfo.suggestionSpan = suggestionSpan; 2794 suggestionInfo.suggestionIndex = suggestionIndex; 2795 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2796 2797 mNumberOfSuggestions++; 2798 2799 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2800 // Also end outer for loop 2801 spanIndex = nbSpans; 2802 break; 2803 } 2804 } 2805 } 2806 } 2807 2808 for (int i = 0; i < mNumberOfSuggestions; i++) { 2809 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2810 } 2811 2812 // Add "Add to dictionary" item if there is a span with the misspelled flag 2813 if (misspelledSpan != null) { 2814 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2815 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2816 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2817 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2818 suggestionInfo.suggestionSpan = misspelledSpan; 2819 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2820 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2821 getContext().getString(com.android.internal.R.string.addToDictionary)); 2822 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2823 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2824 2825 mNumberOfSuggestions++; 2826 } 2827 } 2828 2829 // Delete item 2830 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2831 suggestionInfo.suggestionSpan = null; 2832 suggestionInfo.suggestionIndex = DELETE_TEXT; 2833 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2834 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2835 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2836 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2837 mNumberOfSuggestions++; 2838 2839 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2840 if (underlineColor == 0) { 2841 // Fallback on the default highlight color when the first span does not provide one 2842 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2843 } else { 2844 final float BACKGROUND_TRANSPARENCY = 0.4f; 2845 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2846 mSuggestionRangeSpan.setBackgroundColor( 2847 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2848 } 2849 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2850 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2851 2852 mSuggestionsAdapter.notifyDataSetChanged(); 2853 return true; 2854 } 2855 2856 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2857 int unionEnd) { 2858 final Spannable text = (Spannable) mTextView.getText(); 2859 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2860 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2861 2862 // Adjust the start/end of the suggestion span 2863 suggestionInfo.suggestionStart = spanStart - unionStart; 2864 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2865 + suggestionInfo.text.length(); 2866 2867 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2868 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2869 2870 // Add the text before and after the span. 2871 final String textAsString = text.toString(); 2872 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2873 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2874 } 2875 2876 @Override 2877 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2878 Editable editable = (Editable) mTextView.getText(); 2879 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2880 2881 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2882 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2883 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2884 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2885 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2886 if (spanUnionEnd < editable.length() && 2887 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2888 (spanUnionStart == 0 || 2889 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2890 spanUnionEnd = spanUnionEnd + 1; 2891 } 2892 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2893 } 2894 hide(); 2895 return; 2896 } 2897 2898 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2899 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2900 if (spanStart < 0 || spanEnd <= spanStart) { 2901 // Span has been removed 2902 hide(); 2903 return; 2904 } 2905 2906 final String originalText = editable.toString().substring(spanStart, spanEnd); 2907 2908 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2909 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2910 intent.putExtra("word", originalText); 2911 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2912 // Put a listener to replace the original text with a word which the user 2913 // modified in a user dictionary dialog. 2914 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2915 mTextView.getContext().startActivity(intent); 2916 // There is no way to know if the word was indeed added. Re-check. 2917 // TODO The ExtractEditText should remove the span in the original text instead 2918 editable.removeSpan(suggestionInfo.suggestionSpan); 2919 Selection.setSelection(editable, spanEnd); 2920 updateSpellCheckSpans(spanStart, spanEnd, false); 2921 } else { 2922 // SuggestionSpans are removed by replace: save them before 2923 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2924 SuggestionSpan.class); 2925 final int length = suggestionSpans.length; 2926 int[] suggestionSpansStarts = new int[length]; 2927 int[] suggestionSpansEnds = new int[length]; 2928 int[] suggestionSpansFlags = new int[length]; 2929 for (int i = 0; i < length; i++) { 2930 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2931 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2932 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2933 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2934 2935 // Remove potential misspelled flags 2936 int suggestionSpanFlags = suggestionSpan.getFlags(); 2937 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2938 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2939 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2940 suggestionSpan.setFlags(suggestionSpanFlags); 2941 } 2942 } 2943 2944 final int suggestionStart = suggestionInfo.suggestionStart; 2945 final int suggestionEnd = suggestionInfo.suggestionEnd; 2946 final String suggestion = suggestionInfo.text.subSequence( 2947 suggestionStart, suggestionEnd).toString(); 2948 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2949 2950 // Notify source IME of the suggestion pick. Do this before 2951 // swaping texts. 2952 suggestionInfo.suggestionSpan.notifySelection( 2953 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 2954 2955 // Swap text content between actual text and Suggestion span 2956 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 2957 suggestions[suggestionInfo.suggestionIndex] = originalText; 2958 2959 // Restore previous SuggestionSpans 2960 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 2961 for (int i = 0; i < length; i++) { 2962 // Only spans that include the modified region make sense after replacement 2963 // Spans partially included in the replaced region are removed, there is no 2964 // way to assign them a valid range after replacement 2965 if (suggestionSpansStarts[i] <= spanStart && 2966 suggestionSpansEnds[i] >= spanEnd) { 2967 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2968 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 2969 } 2970 } 2971 2972 // Move cursor at the end of the replaced word 2973 final int newCursorPosition = spanEnd + lengthDifference; 2974 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2975 } 2976 2977 hide(); 2978 } 2979 } 2980 2981 /** 2982 * An ActionMode Callback class that is used to provide actions while in text selection mode. 2983 * 2984 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 2985 * on which of these this TextView supports. 2986 */ 2987 private class SelectionActionModeCallback extends ActionMode.Callback2 { 2988 private final Path mSelectionPath = new Path(); 2989 private final RectF mSelectionBounds = new RectF(); 2990 2991 private int mSelectionHandleHeight; 2992 private int mInsertionHandleHeight; 2993 2994 public SelectionActionModeCallback() { 2995 SelectionModifierCursorController selectionController = getSelectionController(); 2996 if (selectionController.mStartHandle == null) { 2997 selectionController.initDrawables(); 2998 selectionController.initHandles(); 2999 } 3000 mSelectionHandleHeight = Math.max( 3001 mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight()); 3002 InsertionPointCursorController insertionController = getInsertionController(); 3003 if (insertionController != null) { 3004 insertionController.getHandle(); 3005 mInsertionHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3006 } 3007 } 3008 3009 @Override 3010 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3011 mode.setTitle(mTextView.getContext().getString( 3012 com.android.internal.R.string.textSelectionCABTitle)); 3013 mode.setSubtitle(null); 3014 mode.setTitleOptionalHint(true); 3015 populateMenuWithItems(menu); 3016 3017 if (mCustomSelectionActionModeCallback != null) { 3018 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 3019 // The custom mode can choose to cancel the action mode 3020 return false; 3021 } 3022 } 3023 3024 addIntentMenuItemsForTextProcessing(menu); 3025 3026 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3027 mTextView.setHasTransientState(true); 3028 return true; 3029 } else { 3030 return false; 3031 } 3032 } 3033 3034 private void populateMenuWithItems(Menu menu) { 3035 if (mTextView.canCut()) { 3036 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 3037 setAlphabeticShortcut('x'). 3038 setShowAsAction( 3039 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3040 } 3041 3042 if (mTextView.canCopy()) { 3043 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 3044 setAlphabeticShortcut('c'). 3045 setShowAsAction( 3046 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3047 } 3048 3049 if (mTextView.canPaste()) { 3050 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 3051 setAlphabeticShortcut('v'). 3052 setShowAsAction( 3053 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3054 } 3055 3056 if (mTextView.canShare()) { 3057 menu.add(0, TextView.ID_SHARE, 0, com.android.internal.R.string.share). 3058 setShowAsAction( 3059 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3060 } 3061 3062 if (mTextView.canSelectAllText()) { 3063 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 3064 setAlphabeticShortcut('a'). 3065 setShowAsAction( 3066 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3067 } 3068 3069 updateReplaceItem(menu); 3070 } 3071 3072 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3073 if (mTextView.canProcessText()) { 3074 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3075 List<ResolveInfo> supportedActivities = 3076 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3077 for (ResolveInfo info : supportedActivities) { 3078 menu.add(info.loadLabel(packageManager)) 3079 .setIntent(createProcessTextIntentForResolveInfo(info)) 3080 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM 3081 | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3082 } 3083 } 3084 } 3085 3086 private Intent createProcessTextIntent() { 3087 return new Intent() 3088 .setAction(Intent.ACTION_PROCESS_TEXT) 3089 .setType("text/plain"); 3090 } 3091 3092 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3093 return createProcessTextIntent() 3094 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3095 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3096 } 3097 3098 @Override 3099 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3100 updateReplaceItem(menu); 3101 3102 if (mCustomSelectionActionModeCallback != null) { 3103 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3104 } 3105 return true; 3106 } 3107 3108 private void updateReplaceItem(Menu menu) { 3109 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3110 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3111 if (canReplace && !replaceItemExists) { 3112 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 3113 setShowAsAction( 3114 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3115 } else if (!canReplace && replaceItemExists) { 3116 menu.removeItem(TextView.ID_REPLACE); 3117 } 3118 } 3119 3120 @Override 3121 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3122 if (item.getIntent() != null 3123 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3124 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3125 mPreserveDetachedSelection = true; 3126 mTextView.startActivityForResult( 3127 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3128 return true; 3129 } 3130 if (mCustomSelectionActionModeCallback != null && 3131 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3132 return true; 3133 } 3134 if (item.getItemId() == TextView.ID_REPLACE) { 3135 onReplace(); 3136 return true; 3137 } 3138 return mTextView.onTextContextMenuItem(item.getItemId()); 3139 } 3140 3141 @Override 3142 public void onDestroyActionMode(ActionMode mode) { 3143 if (mCustomSelectionActionModeCallback != null) { 3144 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3145 } 3146 3147 /* 3148 * If we're ending this mode because we're detaching from a window, 3149 * we still have selection state to preserve. Don't clear it, we'll 3150 * bring back the selection mode when (if) we get reattached. 3151 */ 3152 if (!mPreserveDetachedSelection) { 3153 Selection.setSelection((Spannable) mTextView.getText(), 3154 mTextView.getSelectionEnd()); 3155 mTextView.setHasTransientState(false); 3156 } 3157 3158 if (mSelectionModifierCursorController != null) { 3159 mSelectionModifierCursorController.hide(); 3160 } 3161 3162 mSelectionActionMode = null; 3163 } 3164 3165 @Override 3166 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3167 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3168 super.onGetContentRect(mode, view, outRect); 3169 return; 3170 } 3171 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3172 // We have a selection. 3173 mSelectionPath.reset(); 3174 mTextView.getLayout().getSelectionPath( 3175 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3176 mSelectionPath.computeBounds(mSelectionBounds, true); 3177 mSelectionBounds.bottom += mSelectionHandleHeight; 3178 } else if (mCursorCount == 2) { 3179 // We have a split cursor. In this case, we take the rectangle that includes both 3180 // parts of the cursor to ensure we don't obscure either of them. 3181 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3182 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3183 mSelectionBounds.set( 3184 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3185 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3186 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3187 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3188 + mInsertionHandleHeight); 3189 } else { 3190 // We have a single cursor. 3191 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3192 float primaryHorizontal = 3193 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3194 mSelectionBounds.set( 3195 primaryHorizontal, 3196 mTextView.getLayout().getLineTop(line), 3197 primaryHorizontal + 1, 3198 mTextView.getLayout().getLineTop(line + 1) + mInsertionHandleHeight); 3199 } 3200 // Take TextView's padding and scroll into account. 3201 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3202 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3203 outRect.set( 3204 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3205 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3206 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3207 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3208 } 3209 } 3210 3211 private void onReplace() { 3212 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3213 stopSelectionActionMode(); 3214 Selection.setSelection((Spannable) mTextView.getText(), middle); 3215 showSuggestions(); 3216 } 3217 3218 /** 3219 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3220 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3221 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3222 */ 3223 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3224 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3225 final int[] mTmpIntOffset = new int[2]; 3226 final Matrix mViewToScreenMatrix = new Matrix(); 3227 3228 @Override 3229 public void updatePosition(int parentPositionX, int parentPositionY, 3230 boolean parentPositionChanged, boolean parentScrolled) { 3231 final InputMethodState ims = mInputMethodState; 3232 if (ims == null || ims.mBatchEditNesting > 0) { 3233 return; 3234 } 3235 final InputMethodManager imm = InputMethodManager.peekInstance(); 3236 if (null == imm) { 3237 return; 3238 } 3239 if (!imm.isActive(mTextView)) { 3240 return; 3241 } 3242 // Skip if the IME has not requested the cursor/anchor position. 3243 if (!imm.isCursorAnchorInfoEnabled()) { 3244 return; 3245 } 3246 Layout layout = mTextView.getLayout(); 3247 if (layout == null) { 3248 return; 3249 } 3250 3251 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3252 builder.reset(); 3253 3254 final int selectionStart = mTextView.getSelectionStart(); 3255 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3256 3257 // Construct transformation matrix from view local coordinates to screen coordinates. 3258 mViewToScreenMatrix.set(mTextView.getMatrix()); 3259 mTextView.getLocationOnScreen(mTmpIntOffset); 3260 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3261 builder.setMatrix(mViewToScreenMatrix); 3262 3263 final float viewportToContentHorizontalOffset = 3264 mTextView.viewportToContentHorizontalOffset(); 3265 final float viewportToContentVerticalOffset = 3266 mTextView.viewportToContentVerticalOffset(); 3267 3268 final CharSequence text = mTextView.getText(); 3269 if (text instanceof Spannable) { 3270 final Spannable sp = (Spannable) text; 3271 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3272 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3273 if (composingTextEnd < composingTextStart) { 3274 final int temp = composingTextEnd; 3275 composingTextEnd = composingTextStart; 3276 composingTextStart = temp; 3277 } 3278 final boolean hasComposingText = 3279 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3280 if (hasComposingText) { 3281 final CharSequence composingText = text.subSequence(composingTextStart, 3282 composingTextEnd); 3283 builder.setComposingText(composingTextStart, composingText); 3284 3285 final int minLine = layout.getLineForOffset(composingTextStart); 3286 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3287 for (int line = minLine; line <= maxLine; ++line) { 3288 final int lineStart = layout.getLineStart(line); 3289 final int lineEnd = layout.getLineEnd(line); 3290 final int offsetStart = Math.max(lineStart, composingTextStart); 3291 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3292 final boolean ltrLine = 3293 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3294 final float[] widths = new float[offsetEnd - offsetStart]; 3295 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3296 final float top = layout.getLineTop(line); 3297 final float bottom = layout.getLineBottom(line); 3298 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3299 final float charWidth = widths[offset - offsetStart]; 3300 final boolean isRtl = layout.isRtlCharAt(offset); 3301 final float primary = layout.getPrimaryHorizontal(offset); 3302 final float secondary = layout.getSecondaryHorizontal(offset); 3303 // TODO: This doesn't work perfectly for text with custom styles and 3304 // TAB chars. 3305 final float left; 3306 final float right; 3307 if (ltrLine) { 3308 if (isRtl) { 3309 left = secondary - charWidth; 3310 right = secondary; 3311 } else { 3312 left = primary; 3313 right = primary + charWidth; 3314 } 3315 } else { 3316 if (!isRtl) { 3317 left = secondary; 3318 right = secondary + charWidth; 3319 } else { 3320 left = primary - charWidth; 3321 right = primary; 3322 } 3323 } 3324 // TODO: Check top-right and bottom-left as well. 3325 final float localLeft = left + viewportToContentHorizontalOffset; 3326 final float localRight = right + viewportToContentHorizontalOffset; 3327 final float localTop = top + viewportToContentVerticalOffset; 3328 final float localBottom = bottom + viewportToContentVerticalOffset; 3329 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3330 final boolean isBottomRightVisible = 3331 isPositionVisible(localRight, localBottom); 3332 int characterBoundsFlags = 0; 3333 if (isTopLeftVisible || isBottomRightVisible) { 3334 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3335 } 3336 if (!isTopLeftVisible || !isBottomRightVisible) { 3337 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3338 } 3339 if (isRtl) { 3340 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3341 } 3342 // Here offset is the index in Java chars. 3343 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3344 localBottom, characterBoundsFlags); 3345 } 3346 } 3347 } 3348 } 3349 3350 // Treat selectionStart as the insertion point. 3351 if (0 <= selectionStart) { 3352 final int offset = selectionStart; 3353 final int line = layout.getLineForOffset(offset); 3354 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3355 + viewportToContentHorizontalOffset; 3356 final float insertionMarkerTop = layout.getLineTop(line) 3357 + viewportToContentVerticalOffset; 3358 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3359 + viewportToContentVerticalOffset; 3360 final float insertionMarkerBottom = layout.getLineBottom(line) 3361 + viewportToContentVerticalOffset; 3362 final boolean isTopVisible = 3363 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3364 final boolean isBottomVisible = 3365 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3366 int insertionMarkerFlags = 0; 3367 if (isTopVisible || isBottomVisible) { 3368 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3369 } 3370 if (!isTopVisible || !isBottomVisible) { 3371 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3372 } 3373 if (layout.isRtlCharAt(offset)) { 3374 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3375 } 3376 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3377 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3378 } 3379 3380 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3381 } 3382 } 3383 3384 private abstract class HandleView extends View implements TextViewPositionListener { 3385 protected Drawable mDrawable; 3386 protected Drawable mDrawableLtr; 3387 protected Drawable mDrawableRtl; 3388 private final PopupWindow mContainer; 3389 // Position with respect to the parent TextView 3390 private int mPositionX, mPositionY; 3391 private boolean mIsDragging; 3392 // Offset from touch position to mPosition 3393 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3394 protected int mHotspotX; 3395 protected int mHorizontalGravity; 3396 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3397 private float mTouchOffsetY; 3398 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3399 private float mIdealVerticalOffset; 3400 // Parent's (TextView) previous position in window 3401 private int mLastParentX, mLastParentY; 3402 // Previous text character offset 3403 protected int mPreviousOffset = -1; 3404 // Previous text character offset 3405 private boolean mPositionHasChanged = true; 3406 // Minimum touch target size for handles 3407 private int mMinSize; 3408 // Indicates the line of text that the handle is on. 3409 protected int mPrevLine = -1; 3410 3411 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3412 super(mTextView.getContext()); 3413 mContainer = new PopupWindow(mTextView.getContext(), null, 3414 com.android.internal.R.attr.textSelectHandleWindowStyle); 3415 mContainer.setSplitTouchEnabled(true); 3416 mContainer.setClippingEnabled(false); 3417 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3418 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3419 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3420 mContainer.setContentView(this); 3421 3422 mDrawableLtr = drawableLtr; 3423 mDrawableRtl = drawableRtl; 3424 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3425 com.android.internal.R.dimen.text_handle_min_size); 3426 3427 updateDrawable(); 3428 3429 final int handleHeight = getPreferredHeight(); 3430 mTouchOffsetY = -0.3f * handleHeight; 3431 mIdealVerticalOffset = 0.7f * handleHeight; 3432 } 3433 3434 protected void updateDrawable() { 3435 final int offset = getCurrentCursorOffset(); 3436 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3437 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3438 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3439 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3440 } 3441 3442 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3443 protected abstract int getHorizontalGravity(boolean isRtlRun); 3444 3445 // Touch-up filter: number of previous positions remembered 3446 private static final int HISTORY_SIZE = 5; 3447 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3448 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3449 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3450 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3451 private int mPreviousOffsetIndex = 0; 3452 private int mNumberPreviousOffsets = 0; 3453 3454 private void startTouchUpFilter(int offset) { 3455 mNumberPreviousOffsets = 0; 3456 addPositionToTouchUpFilter(offset); 3457 } 3458 3459 private void addPositionToTouchUpFilter(int offset) { 3460 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3461 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3462 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3463 mNumberPreviousOffsets++; 3464 } 3465 3466 private void filterOnTouchUp() { 3467 final long now = SystemClock.uptimeMillis(); 3468 int i = 0; 3469 int index = mPreviousOffsetIndex; 3470 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3471 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3472 i++; 3473 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3474 } 3475 3476 if (i > 0 && i < iMax && 3477 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3478 positionAtCursorOffset(mPreviousOffsets[index], false); 3479 } 3480 } 3481 3482 public boolean offsetHasBeenChanged() { 3483 return mNumberPreviousOffsets > 1; 3484 } 3485 3486 @Override 3487 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3488 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3489 } 3490 3491 private int getPreferredWidth() { 3492 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3493 } 3494 3495 private int getPreferredHeight() { 3496 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3497 } 3498 3499 public void show() { 3500 if (isShowing()) return; 3501 3502 getPositionListener().addSubscriber(this, true /* local position may change */); 3503 3504 // Make sure the offset is always considered new, even when focusing at same position 3505 mPreviousOffset = -1; 3506 positionAtCursorOffset(getCurrentCursorOffset(), false); 3507 } 3508 3509 protected void dismiss() { 3510 mIsDragging = false; 3511 mContainer.dismiss(); 3512 onDetached(); 3513 } 3514 3515 public void hide() { 3516 dismiss(); 3517 3518 getPositionListener().removeSubscriber(this); 3519 } 3520 3521 public boolean isShowing() { 3522 return mContainer.isShowing(); 3523 } 3524 3525 private boolean isVisible() { 3526 // Always show a dragging handle. 3527 if (mIsDragging) { 3528 return true; 3529 } 3530 3531 if (mTextView.isInBatchEditMode()) { 3532 return false; 3533 } 3534 3535 return isPositionVisible(mPositionX + mHotspotX, mPositionY); 3536 } 3537 3538 public abstract int getCurrentCursorOffset(); 3539 3540 protected abstract void updateSelection(int offset); 3541 3542 public abstract void updatePosition(float x, float y); 3543 3544 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3545 // A HandleView relies on the layout, which may be nulled by external methods 3546 Layout layout = mTextView.getLayout(); 3547 if (layout == null) { 3548 // Will update controllers' state, hiding them and stopping selection mode if needed 3549 prepareCursorControllers(); 3550 return; 3551 } 3552 3553 boolean offsetChanged = offset != mPreviousOffset; 3554 if (offsetChanged || parentScrolled) { 3555 if (offsetChanged) { 3556 updateSelection(offset); 3557 addPositionToTouchUpFilter(offset); 3558 } 3559 final int line = layout.getLineForOffset(offset); 3560 mPrevLine = line; 3561 3562 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3563 getHorizontalOffset() + getCursorOffset()); 3564 mPositionY = layout.getLineBottom(line); 3565 3566 // Take TextView's padding and scroll into account. 3567 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3568 mPositionY += mTextView.viewportToContentVerticalOffset(); 3569 3570 mPreviousOffset = offset; 3571 mPositionHasChanged = true; 3572 } 3573 } 3574 3575 public void updatePosition(int parentPositionX, int parentPositionY, 3576 boolean parentPositionChanged, boolean parentScrolled) { 3577 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3578 if (parentPositionChanged || mPositionHasChanged) { 3579 if (mIsDragging) { 3580 // Update touchToWindow offset in case of parent scrolling while dragging 3581 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3582 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3583 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3584 mLastParentX = parentPositionX; 3585 mLastParentY = parentPositionY; 3586 } 3587 3588 onHandleMoved(); 3589 } 3590 3591 if (isVisible()) { 3592 final int positionX = parentPositionX + mPositionX; 3593 final int positionY = parentPositionY + mPositionY; 3594 if (isShowing()) { 3595 mContainer.update(positionX, positionY, -1, -1); 3596 } else { 3597 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3598 positionX, positionY); 3599 } 3600 } else { 3601 if (isShowing()) { 3602 dismiss(); 3603 } 3604 } 3605 3606 mPositionHasChanged = false; 3607 } 3608 } 3609 3610 public void showAtLocation(int offset) { 3611 // TODO - investigate if there's a better way to show the handles 3612 // after the drag accelerator has occured. 3613 int[] tmpCords = new int[2]; 3614 mTextView.getLocationInWindow(tmpCords); 3615 3616 Layout layout = mTextView.getLayout(); 3617 int posX = tmpCords[0]; 3618 int posY = tmpCords[1]; 3619 3620 final int line = layout.getLineForOffset(offset); 3621 3622 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3623 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3624 int startY = layout.getLineBottom(line); 3625 3626 // Take TextView's padding and scroll into account. 3627 startX += mTextView.viewportToContentHorizontalOffset(); 3628 startY += mTextView.viewportToContentVerticalOffset(); 3629 3630 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3631 startX + posX, startY + posY); 3632 } 3633 3634 @Override 3635 protected void onDraw(Canvas c) { 3636 final int drawWidth = mDrawable.getIntrinsicWidth(); 3637 final int left = getHorizontalOffset(); 3638 3639 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3640 mDrawable.draw(c); 3641 } 3642 3643 private int getHorizontalOffset() { 3644 final int width = getPreferredWidth(); 3645 final int drawWidth = mDrawable.getIntrinsicWidth(); 3646 final int left; 3647 switch (mHorizontalGravity) { 3648 case Gravity.LEFT: 3649 left = 0; 3650 break; 3651 default: 3652 case Gravity.CENTER: 3653 left = (width - drawWidth) / 2; 3654 break; 3655 case Gravity.RIGHT: 3656 left = width - drawWidth; 3657 break; 3658 } 3659 return left; 3660 } 3661 3662 protected int getCursorOffset() { 3663 return 0; 3664 } 3665 3666 @Override 3667 public boolean onTouchEvent(MotionEvent ev) { 3668 switch (ev.getActionMasked()) { 3669 case MotionEvent.ACTION_DOWN: { 3670 startTouchUpFilter(getCurrentCursorOffset()); 3671 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3672 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3673 3674 final PositionListener positionListener = getPositionListener(); 3675 mLastParentX = positionListener.getPositionX(); 3676 mLastParentY = positionListener.getPositionY(); 3677 mIsDragging = true; 3678 break; 3679 } 3680 3681 case MotionEvent.ACTION_MOVE: { 3682 final float rawX = ev.getRawX(); 3683 final float rawY = ev.getRawY(); 3684 3685 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3686 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3687 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3688 float newVerticalOffset; 3689 if (previousVerticalOffset < mIdealVerticalOffset) { 3690 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3691 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3692 } else { 3693 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3694 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3695 } 3696 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3697 3698 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3699 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3700 3701 updatePosition(newPosX, newPosY); 3702 break; 3703 } 3704 3705 case MotionEvent.ACTION_UP: 3706 filterOnTouchUp(); 3707 mIsDragging = false; 3708 break; 3709 3710 case MotionEvent.ACTION_CANCEL: 3711 mIsDragging = false; 3712 break; 3713 } 3714 return true; 3715 } 3716 3717 public boolean isDragging() { 3718 return mIsDragging; 3719 } 3720 3721 void onHandleMoved() {} 3722 3723 public void onDetached() {} 3724 } 3725 3726 private class InsertionHandleView extends HandleView { 3727 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3728 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3729 3730 // Used to detect taps on the insertion handle, which will affect the selection action mode 3731 private float mDownPositionX, mDownPositionY; 3732 private Runnable mHider; 3733 3734 public InsertionHandleView(Drawable drawable) { 3735 super(drawable, drawable); 3736 } 3737 3738 @Override 3739 public void show() { 3740 super.show(); 3741 3742 final long durationSinceCutOrCopy = 3743 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3744 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3745 startSelectionActionModeWithoutSelection(); 3746 } 3747 3748 hideAfterDelay(); 3749 } 3750 3751 private void hideAfterDelay() { 3752 if (mHider == null) { 3753 mHider = new Runnable() { 3754 public void run() { 3755 hide(); 3756 } 3757 }; 3758 } else { 3759 removeHiderCallback(); 3760 } 3761 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3762 } 3763 3764 private void removeHiderCallback() { 3765 if (mHider != null) { 3766 mTextView.removeCallbacks(mHider); 3767 } 3768 } 3769 3770 @Override 3771 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3772 return drawable.getIntrinsicWidth() / 2; 3773 } 3774 3775 @Override 3776 protected int getHorizontalGravity(boolean isRtlRun) { 3777 return Gravity.CENTER_HORIZONTAL; 3778 } 3779 3780 @Override 3781 protected int getCursorOffset() { 3782 int offset = super.getCursorOffset(); 3783 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3784 if (cursor != null) { 3785 cursor.getPadding(mTempRect); 3786 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3787 } 3788 return offset; 3789 } 3790 3791 @Override 3792 public boolean onTouchEvent(MotionEvent ev) { 3793 final boolean result = super.onTouchEvent(ev); 3794 3795 switch (ev.getActionMasked()) { 3796 case MotionEvent.ACTION_DOWN: 3797 mDownPositionX = ev.getRawX(); 3798 mDownPositionY = ev.getRawY(); 3799 break; 3800 3801 case MotionEvent.ACTION_UP: 3802 if (!offsetHasBeenChanged()) { 3803 final float deltaX = mDownPositionX - ev.getRawX(); 3804 final float deltaY = mDownPositionY - ev.getRawY(); 3805 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3806 3807 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3808 mTextView.getContext()); 3809 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3810 3811 if (distanceSquared < touchSlop * touchSlop) { 3812 // Tapping on the handle toggles the selection action mode. 3813 if (mSelectionActionMode != null) { 3814 mSelectionActionMode.finish(); 3815 } else { 3816 startSelectionActionModeWithoutSelection(); 3817 } 3818 } 3819 } 3820 hideAfterDelay(); 3821 break; 3822 3823 case MotionEvent.ACTION_CANCEL: 3824 hideAfterDelay(); 3825 break; 3826 3827 default: 3828 break; 3829 } 3830 3831 return result; 3832 } 3833 3834 @Override 3835 public int getCurrentCursorOffset() { 3836 return mTextView.getSelectionStart(); 3837 } 3838 3839 @Override 3840 public void updateSelection(int offset) { 3841 Selection.setSelection((Spannable) mTextView.getText(), offset); 3842 } 3843 3844 @Override 3845 public void updatePosition(float x, float y) { 3846 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3847 } 3848 3849 @Override 3850 void onHandleMoved() { 3851 super.onHandleMoved(); 3852 removeHiderCallback(); 3853 } 3854 3855 @Override 3856 public void onDetached() { 3857 super.onDetached(); 3858 removeHiderCallback(); 3859 } 3860 } 3861 3862 private class SelectionStartHandleView extends HandleView { 3863 // Indicates whether the cursor is making adjustments within a word. 3864 private boolean mInWord = false; 3865 // Offset to track difference between touch and word boundary. 3866 protected int mTouchWordOffset; 3867 3868 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3869 super(drawableLtr, drawableRtl); 3870 } 3871 3872 @Override 3873 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3874 return isRtlRun ? 0 : drawable.getIntrinsicWidth(); 3875 } 3876 3877 @Override 3878 protected int getHorizontalGravity(boolean isRtlRun) { 3879 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 3880 } 3881 3882 @Override 3883 public int getCurrentCursorOffset() { 3884 return mTextView.getSelectionStart(); 3885 } 3886 3887 @Override 3888 public void updateSelection(int offset) { 3889 Selection.setSelection((Spannable) mTextView.getText(), offset, 3890 mTextView.getSelectionEnd()); 3891 updateDrawable(); 3892 if (mSelectionActionMode != null) { 3893 mSelectionActionMode.invalidate(); 3894 } 3895 } 3896 3897 @Override 3898 public void updatePosition(float x, float y) { 3899 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3900 final int currLine = mTextView.getLineAtCoordinate(y); 3901 3902 // Don't select white space on different lines. 3903 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 3904 3905 boolean positionCursor = false; 3906 int offset = trueOffset; 3907 int end = getWordEnd(offset, true); 3908 int start = getWordStart(offset); 3909 3910 if (offset < mPreviousOffset) { 3911 // User is increasing the selection. 3912 if (!mInWord || currLine < mPrevLine) { 3913 // We're not in a word, or we're on a different line so we'll expand by 3914 // word. First ensure the user has at least entered the next word. 3915 int offsetToWord = Math.min((end - start) / 2, 2); 3916 if (offset <= end - offsetToWord || currLine < mPrevLine) { 3917 offset = start; 3918 } else { 3919 offset = mPreviousOffset; 3920 } 3921 } 3922 mTouchWordOffset = Math.max(trueOffset - offset, 0); 3923 mInWord = !isStartBoundary(offset); 3924 positionCursor = true; 3925 } else if (offset - mTouchWordOffset > mPreviousOffset) { 3926 // User is shrinking the selection. 3927 if (currLine > mPrevLine) { 3928 // We're on a different line, so we'll snap to word boundaries. 3929 offset = end; 3930 } 3931 offset -= mTouchWordOffset; 3932 mInWord = !isEndBoundary(offset); 3933 positionCursor = true; 3934 } 3935 3936 // Handles can not cross and selection is at least one character. 3937 if (positionCursor) { 3938 final int selectionEnd = mTextView.getSelectionEnd(); 3939 if (offset >= selectionEnd) { 3940 // We can't cross the handles so let's just constrain the Y value. 3941 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 3942 if (alteredOffset >= selectionEnd) { 3943 // Can't pass the other drag handle. 3944 offset = Math.max(0, selectionEnd - 1); 3945 } else { 3946 offset = alteredOffset; 3947 } 3948 } 3949 positionAtCursorOffset(offset, false); 3950 } 3951 } 3952 3953 @Override 3954 public boolean onTouchEvent(MotionEvent event) { 3955 boolean superResult = super.onTouchEvent(event); 3956 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 3957 // Reset the touch word offset when the user has lifted their finger. 3958 mTouchWordOffset = 0; 3959 } 3960 return superResult; 3961 } 3962 } 3963 3964 private class SelectionEndHandleView extends HandleView { 3965 // Indicates whether the cursor is making adjustments within a word. 3966 private boolean mInWord = false; 3967 // Offset to track difference between touch and word boundary. 3968 protected int mTouchWordOffset; 3969 3970 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3971 super(drawableLtr, drawableRtl); 3972 } 3973 3974 @Override 3975 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3976 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 3977 } 3978 3979 @Override 3980 protected int getHorizontalGravity(boolean isRtlRun) { 3981 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 3982 } 3983 3984 @Override 3985 public int getCurrentCursorOffset() { 3986 return mTextView.getSelectionEnd(); 3987 } 3988 3989 @Override 3990 public void updateSelection(int offset) { 3991 Selection.setSelection((Spannable) mTextView.getText(), 3992 mTextView.getSelectionStart(), offset); 3993 if (mSelectionActionMode != null) { 3994 mSelectionActionMode.invalidate(); 3995 } 3996 updateDrawable(); 3997 } 3998 3999 @Override 4000 public void updatePosition(float x, float y) { 4001 final int trueOffset = mTextView.getOffsetForPosition(x, y); 4002 final int currLine = mTextView.getLineAtCoordinate(y); 4003 4004 // Don't select white space on different lines. 4005 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 4006 4007 int offset = trueOffset; 4008 boolean positionCursor = false; 4009 4010 int end = getWordEnd(offset, true); 4011 int start = getWordStart(offset); 4012 4013 if (offset > mPreviousOffset) { 4014 // User is increasing the selection. 4015 if (!mInWord || currLine > mPrevLine) { 4016 // We're not in a word, or we're on a different line so we'll expand by 4017 // word. First ensure the user has at least entered the next word. 4018 int midPoint = Math.min((end - start) / 2, 2); 4019 if (offset >= start + midPoint || currLine > mPrevLine) { 4020 offset = end; 4021 } else { 4022 offset = mPreviousOffset; 4023 } 4024 } 4025 mTouchWordOffset = Math.max(offset - trueOffset, 0); 4026 mInWord = !isEndBoundary(offset); 4027 positionCursor = true; 4028 } else if (offset + mTouchWordOffset < mPreviousOffset) { 4029 // User is shrinking the selection. 4030 if (currLine < mPrevLine) { 4031 // We're on a different line, so we'll snap to word boundaries. 4032 offset = start; 4033 } 4034 offset += mTouchWordOffset; 4035 positionCursor = true; 4036 mInWord = !isStartBoundary(offset); 4037 } 4038 4039 if (positionCursor) { 4040 final int selectionStart = mTextView.getSelectionStart(); 4041 if (offset <= selectionStart) { 4042 // We can't cross the handles so let's just constrain the Y value. 4043 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 4044 int length = mTextView.getText().length(); 4045 if (alteredOffset <= selectionStart) { 4046 // Can't pass the other drag handle. 4047 offset = Math.min(selectionStart + 1, length); 4048 } else { 4049 offset = Math.min(alteredOffset, length); 4050 } 4051 } 4052 positionAtCursorOffset(offset, false); 4053 } 4054 } 4055 4056 @Override 4057 public boolean onTouchEvent(MotionEvent event) { 4058 boolean superResult = super.onTouchEvent(event); 4059 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4060 // Reset the touch word offset when the user has lifted their finger. 4061 mTouchWordOffset = 0; 4062 } 4063 return superResult; 4064 } 4065 } 4066 4067 /** 4068 * Checks whether selection is happening on a different line than previous and 4069 * if that line only contains whitespace up to the touch location. 4070 * 4071 * @param prevLine The previous line the selection was on. 4072 * @param currLine The current line being selected. 4073 * @param offset The offset in the text where the touch occurred. 4074 * @return Whether or not it was just a white space line being selected. 4075 */ 4076 private boolean isWhitespaceLine(int prevLine, int currLine, int offset) { 4077 if (prevLine == currLine) { 4078 // Same line; don't care. 4079 return false; 4080 } 4081 CharSequence text = mTextView.getText(); 4082 if (offset == text.length()) { 4083 // No character at the last position. 4084 return false; 4085 } 4086 int lineEndOffset = mTextView.getLayout().getLineEnd(currLine); 4087 for (int cp, i = offset; i < lineEndOffset; i += Character.charCount(cp)) { 4088 cp = Character.codePointAt(text, i); 4089 if (!Character.isSpaceChar(cp) && !Character.isWhitespace(cp)) { 4090 // There are non white space chars on the line. 4091 return false; 4092 } 4093 } 4094 return true; 4095 } 4096 4097 /** 4098 * A CursorController instance can be used to control a cursor in the text. 4099 */ 4100 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4101 /** 4102 * Makes the cursor controller visible on screen. 4103 * See also {@link #hide()}. 4104 */ 4105 public void show(); 4106 4107 /** 4108 * Hide the cursor controller from screen. 4109 * See also {@link #show()}. 4110 */ 4111 public void hide(); 4112 4113 /** 4114 * Called when the view is detached from window. Perform house keeping task, such as 4115 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4116 * preventing the activity from being recycled. 4117 */ 4118 public void onDetached(); 4119 } 4120 4121 private class InsertionPointCursorController implements CursorController { 4122 private InsertionHandleView mHandle; 4123 4124 public void show() { 4125 getHandle().show(); 4126 } 4127 4128 public void hide() { 4129 if (mHandle != null) { 4130 mHandle.hide(); 4131 } 4132 } 4133 4134 public void onTouchModeChanged(boolean isInTouchMode) { 4135 if (!isInTouchMode) { 4136 hide(); 4137 } 4138 } 4139 4140 private InsertionHandleView getHandle() { 4141 if (mSelectHandleCenter == null) { 4142 mSelectHandleCenter = mTextView.getContext().getDrawable( 4143 mTextView.mTextSelectHandleRes); 4144 } 4145 if (mHandle == null) { 4146 mHandle = new InsertionHandleView(mSelectHandleCenter); 4147 } 4148 return mHandle; 4149 } 4150 4151 @Override 4152 public void onDetached() { 4153 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4154 observer.removeOnTouchModeChangeListener(this); 4155 4156 if (mHandle != null) mHandle.onDetached(); 4157 } 4158 } 4159 4160 class SelectionModifierCursorController implements CursorController { 4161 // The cursor controller handles, lazily created when shown. 4162 private SelectionStartHandleView mStartHandle; 4163 private SelectionEndHandleView mEndHandle; 4164 // The offsets of that last touch down event. Remembered to start selection there. 4165 private int mMinTouchOffset, mMaxTouchOffset; 4166 4167 // Double tap detection 4168 private long mPreviousTapUpTime = 0; 4169 private float mDownPositionX, mDownPositionY; 4170 private boolean mGestureStayedInTapRegion; 4171 4172 // Where the user first starts the drag motion. 4173 private int mStartOffset = -1; 4174 // Indicates whether the user is selecting text and using the drag accelerator. 4175 private boolean mDragAcceleratorActive; 4176 // Indicates the line of text the drag accelerator is on. 4177 private int mPrevLine = -1; 4178 4179 SelectionModifierCursorController() { 4180 resetTouchOffsets(); 4181 } 4182 4183 public void show() { 4184 if (mTextView.isInBatchEditMode()) { 4185 return; 4186 } 4187 initDrawables(); 4188 initHandles(); 4189 hideInsertionPointCursorController(); 4190 } 4191 4192 private void initDrawables() { 4193 if (mSelectHandleLeft == null) { 4194 mSelectHandleLeft = mTextView.getContext().getDrawable( 4195 mTextView.mTextSelectHandleLeftRes); 4196 } 4197 if (mSelectHandleRight == null) { 4198 mSelectHandleRight = mTextView.getContext().getDrawable( 4199 mTextView.mTextSelectHandleRightRes); 4200 } 4201 } 4202 4203 private void initHandles() { 4204 // Lazy object creation has to be done before updatePosition() is called. 4205 if (mStartHandle == null) { 4206 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4207 } 4208 if (mEndHandle == null) { 4209 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4210 } 4211 4212 mStartHandle.show(); 4213 mEndHandle.show(); 4214 4215 hideInsertionPointCursorController(); 4216 } 4217 4218 public void hide() { 4219 if (mStartHandle != null) mStartHandle.hide(); 4220 if (mEndHandle != null) mEndHandle.hide(); 4221 } 4222 4223 public void enterDrag() { 4224 // Just need to init the handles / hide insertion cursor. 4225 show(); 4226 mDragAcceleratorActive = true; 4227 // Start location of selection. 4228 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4229 mLastDownPositionY); 4230 // Don't show the handles until user has lifted finger. 4231 hide(); 4232 4233 // This stops scrolling parents from intercepting the touch event, allowing 4234 // the user to continue dragging across the screen to select text; TextView will 4235 // scroll as necessary. 4236 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4237 } 4238 4239 public void onTouchEvent(MotionEvent event) { 4240 // This is done even when the View does not have focus, so that long presses can start 4241 // selection and tap can move cursor from this tap position. 4242 switch (event.getActionMasked()) { 4243 case MotionEvent.ACTION_DOWN: 4244 final float x = event.getX(); 4245 final float y = event.getY(); 4246 4247 // Remember finger down position, to be able to start selection from there. 4248 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4249 4250 // Double tap detection 4251 if (mGestureStayedInTapRegion) { 4252 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 4253 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 4254 final float deltaX = x - mDownPositionX; 4255 final float deltaY = y - mDownPositionY; 4256 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4257 4258 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4259 mTextView.getContext()); 4260 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4261 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4262 4263 if (stayedInArea && isPositionOnText(x, y)) { 4264 startSelectionActionModeWithSelectionAndStartDrag(); 4265 mDiscardNextActionUp = true; 4266 } 4267 } 4268 } 4269 4270 // New selection, reset line. 4271 mPrevLine = mTextView.getLineAtCoordinate(y); 4272 mDownPositionX = x; 4273 mDownPositionY = y; 4274 mGestureStayedInTapRegion = true; 4275 break; 4276 4277 case MotionEvent.ACTION_POINTER_DOWN: 4278 case MotionEvent.ACTION_POINTER_UP: 4279 // Handle multi-point gestures. Keep min and max offset positions. 4280 // Only activated for devices that correctly handle multi-touch. 4281 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4282 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4283 updateMinAndMaxOffsets(event); 4284 } 4285 break; 4286 4287 case MotionEvent.ACTION_MOVE: 4288 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4289 mTextView.getContext()); 4290 4291 if (mGestureStayedInTapRegion) { 4292 final float deltaX = event.getX() - mDownPositionX; 4293 final float deltaY = event.getY() - mDownPositionY; 4294 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4295 4296 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4297 4298 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4299 mGestureStayedInTapRegion = false; 4300 } 4301 } 4302 4303 if (mStartHandle != null && mStartHandle.isShowing()) { 4304 // Don't do the drag if the handles are showing already. 4305 break; 4306 } 4307 4308 if (mStartOffset != -1) { 4309 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4310 event.getY()); 4311 int offset = rawOffset; 4312 4313 // We don't start "dragging" until the user is past the initial word that 4314 // gets selected on long press. 4315 int firstWordStart = getWordStart(mStartOffset); 4316 int firstWordEnd = getWordEnd(mStartOffset, false); 4317 if (offset > firstWordEnd || offset < firstWordStart) { 4318 4319 // Basically the goal in the below code is to have the highlight be 4320 // offset so that your finger isn't covering the end point. 4321 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4322 float mx = event.getX(); 4323 float my = event.getY(); 4324 if (mx > fingerOffset) mx -= fingerOffset; 4325 if (my > fingerOffset) my -= fingerOffset; 4326 offset = mTextView.getOffsetForPosition(mx, my); 4327 4328 int currLine = mTextView.getLineAtCoordinate(my); 4329 4330 // Don't select white space on different lines. 4331 if (isWhitespaceLine(mPrevLine, currLine, offset)) return; 4332 4333 mPrevLine = currLine; 4334 4335 // Perform the check for closeness at edge of view, if we're very close 4336 // don't adjust the offset to be in front of the finger - otherwise the 4337 // user can't select words at the edge. 4338 if (mTextView.getWidth() - fingerOffset > mx) { 4339 // We're going by word, so we need to make sure that the offset 4340 // that we get is within this, so we'll get the previous boundary. 4341 final WordIterator wordIterator = getWordIteratorWithText(); 4342 4343 final int precedingOffset = wordIterator.preceding(offset); 4344 if (mStartOffset < offset) { 4345 // Expanding with bottom handle, in this case the selection end 4346 // is before the finger. 4347 offset = Math.max(precedingOffset - 1, 0); 4348 } else { 4349 // Expand with the start handle, in this case the selection 4350 // start is before the finger. 4351 if (precedingOffset == WordIterator.DONE) { 4352 offset = 0; 4353 } else { 4354 offset = wordIterator.preceding(precedingOffset); 4355 } 4356 } 4357 } 4358 if (offset == WordIterator.DONE) 4359 offset = rawOffset; 4360 4361 // Need to adjust start offset based on direction of movement. 4362 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4363 : getWordEnd(mStartOffset, true); 4364 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4365 offset); 4366 } 4367 } 4368 break; 4369 4370 case MotionEvent.ACTION_UP: 4371 mPreviousTapUpTime = SystemClock.uptimeMillis(); 4372 if (mDragAcceleratorActive) { 4373 // No longer dragging to select text, let the parent intercept events. 4374 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4375 4376 show(); 4377 int startOffset = mTextView.getSelectionStart(); 4378 int endOffset = mTextView.getSelectionEnd(); 4379 4380 // Since we don't let drag handles pass once they're visible, we need to 4381 // make sure the start / end locations are correct because the user *can* 4382 // switch directions during the initial drag. 4383 if (endOffset < startOffset) { 4384 int tmp = endOffset; 4385 endOffset = startOffset; 4386 startOffset = tmp; 4387 4388 // Also update the selection with the right offsets in this case. 4389 Selection.setSelection((Spannable) mTextView.getText(), 4390 startOffset, endOffset); 4391 } 4392 4393 // Need to do this to display the handles. 4394 mStartHandle.showAtLocation(startOffset); 4395 mEndHandle.showAtLocation(endOffset); 4396 4397 // No longer the first dragging motion, reset. 4398 mDragAcceleratorActive = false; 4399 mStartOffset = -1; 4400 } 4401 break; 4402 } 4403 } 4404 4405 /** 4406 * @param event 4407 */ 4408 private void updateMinAndMaxOffsets(MotionEvent event) { 4409 int pointerCount = event.getPointerCount(); 4410 for (int index = 0; index < pointerCount; index++) { 4411 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4412 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4413 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4414 } 4415 } 4416 4417 public int getMinTouchOffset() { 4418 return mMinTouchOffset; 4419 } 4420 4421 public int getMaxTouchOffset() { 4422 return mMaxTouchOffset; 4423 } 4424 4425 public void resetTouchOffsets() { 4426 mMinTouchOffset = mMaxTouchOffset = -1; 4427 mStartOffset = -1; 4428 mDragAcceleratorActive = false; 4429 } 4430 4431 /** 4432 * @return true iff this controller is currently used to move the selection start. 4433 */ 4434 public boolean isSelectionStartDragged() { 4435 return mStartHandle != null && mStartHandle.isDragging(); 4436 } 4437 4438 /** 4439 * @return true if the user is selecting text using the drag accelerator. 4440 */ 4441 public boolean isDragAcceleratorActive() { 4442 return mDragAcceleratorActive; 4443 } 4444 4445 public void onTouchModeChanged(boolean isInTouchMode) { 4446 if (!isInTouchMode) { 4447 hide(); 4448 } 4449 } 4450 4451 @Override 4452 public void onDetached() { 4453 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4454 observer.removeOnTouchModeChangeListener(this); 4455 4456 if (mStartHandle != null) mStartHandle.onDetached(); 4457 if (mEndHandle != null) mEndHandle.onDetached(); 4458 } 4459 } 4460 4461 private class CorrectionHighlighter { 4462 private final Path mPath = new Path(); 4463 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4464 private int mStart, mEnd; 4465 private long mFadingStartTime; 4466 private RectF mTempRectF; 4467 private final static int FADE_OUT_DURATION = 400; 4468 4469 public CorrectionHighlighter() { 4470 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4471 applicationScale); 4472 mPaint.setStyle(Paint.Style.FILL); 4473 } 4474 4475 public void highlight(CorrectionInfo info) { 4476 mStart = info.getOffset(); 4477 mEnd = mStart + info.getNewText().length(); 4478 mFadingStartTime = SystemClock.uptimeMillis(); 4479 4480 if (mStart < 0 || mEnd < 0) { 4481 stopAnimation(); 4482 } 4483 } 4484 4485 public void draw(Canvas canvas, int cursorOffsetVertical) { 4486 if (updatePath() && updatePaint()) { 4487 if (cursorOffsetVertical != 0) { 4488 canvas.translate(0, cursorOffsetVertical); 4489 } 4490 4491 canvas.drawPath(mPath, mPaint); 4492 4493 if (cursorOffsetVertical != 0) { 4494 canvas.translate(0, -cursorOffsetVertical); 4495 } 4496 invalidate(true); // TODO invalidate cursor region only 4497 } else { 4498 stopAnimation(); 4499 invalidate(false); // TODO invalidate cursor region only 4500 } 4501 } 4502 4503 private boolean updatePaint() { 4504 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4505 if (duration > FADE_OUT_DURATION) return false; 4506 4507 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4508 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4509 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4510 ((int) (highlightColorAlpha * coef) << 24); 4511 mPaint.setColor(color); 4512 return true; 4513 } 4514 4515 private boolean updatePath() { 4516 final Layout layout = mTextView.getLayout(); 4517 if (layout == null) return false; 4518 4519 // Update in case text is edited while the animation is run 4520 final int length = mTextView.getText().length(); 4521 int start = Math.min(length, mStart); 4522 int end = Math.min(length, mEnd); 4523 4524 mPath.reset(); 4525 layout.getSelectionPath(start, end, mPath); 4526 return true; 4527 } 4528 4529 private void invalidate(boolean delayed) { 4530 if (mTextView.getLayout() == null) return; 4531 4532 if (mTempRectF == null) mTempRectF = new RectF(); 4533 mPath.computeBounds(mTempRectF, false); 4534 4535 int left = mTextView.getCompoundPaddingLeft(); 4536 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4537 4538 if (delayed) { 4539 mTextView.postInvalidateOnAnimation( 4540 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4541 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4542 } else { 4543 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4544 (int) mTempRectF.right, (int) mTempRectF.bottom); 4545 } 4546 } 4547 4548 private void stopAnimation() { 4549 Editor.this.mCorrectionHighlighter = null; 4550 } 4551 } 4552 4553 private static class ErrorPopup extends PopupWindow { 4554 private boolean mAbove = false; 4555 private final TextView mView; 4556 private int mPopupInlineErrorBackgroundId = 0; 4557 private int mPopupInlineErrorAboveBackgroundId = 0; 4558 4559 ErrorPopup(TextView v, int width, int height) { 4560 super(v, width, height); 4561 mView = v; 4562 // Make sure the TextView has a background set as it will be used the first time it is 4563 // shown and positioned. Initialized with below background, which should have 4564 // dimensions identical to the above version for this to work (and is more likely). 4565 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4566 com.android.internal.R.styleable.Theme_errorMessageBackground); 4567 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4568 } 4569 4570 void fixDirection(boolean above) { 4571 mAbove = above; 4572 4573 if (above) { 4574 mPopupInlineErrorAboveBackgroundId = 4575 getResourceId(mPopupInlineErrorAboveBackgroundId, 4576 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4577 } else { 4578 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4579 com.android.internal.R.styleable.Theme_errorMessageBackground); 4580 } 4581 4582 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4583 mPopupInlineErrorBackgroundId); 4584 } 4585 4586 private int getResourceId(int currentId, int index) { 4587 if (currentId == 0) { 4588 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4589 R.styleable.Theme); 4590 currentId = styledAttributes.getResourceId(index, 0); 4591 styledAttributes.recycle(); 4592 } 4593 return currentId; 4594 } 4595 4596 @Override 4597 public void update(int x, int y, int w, int h, boolean force) { 4598 super.update(x, y, w, h, force); 4599 4600 boolean above = isAboveAnchor(); 4601 if (above != mAbove) { 4602 fixDirection(above); 4603 } 4604 } 4605 } 4606 4607 static class InputContentType { 4608 int imeOptions = EditorInfo.IME_NULL; 4609 String privateImeOptions; 4610 CharSequence imeActionLabel; 4611 int imeActionId; 4612 Bundle extras; 4613 OnEditorActionListener onEditorActionListener; 4614 boolean enterDown; 4615 } 4616 4617 static class InputMethodState { 4618 Rect mCursorRectInWindow = new Rect(); 4619 float[] mTmpOffset = new float[2]; 4620 ExtractedTextRequest mExtractedTextRequest; 4621 final ExtractedText mExtractedText = new ExtractedText(); 4622 int mBatchEditNesting; 4623 boolean mCursorChanged; 4624 boolean mSelectionModeChanged; 4625 boolean mContentChanged; 4626 int mChangedStart, mChangedEnd, mChangedDelta; 4627 } 4628 4629 /** 4630 * @return True iff (start, end) is a valid range within the text. 4631 */ 4632 private static boolean isValidRange(CharSequence text, int start, int end) { 4633 return 0 <= start && start <= end && end <= text.length(); 4634 } 4635 4636 /** 4637 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4638 * text being typed (and hence always returns null from the filter() method). 4639 */ 4640 public static class UndoInputFilter implements InputFilter { 4641 private final Editor mEditor; 4642 4643 // Whether the current filter pass is directly caused by an end-user text edit. 4644 private boolean mIsUserEdit; 4645 4646 // Whether the text field is handling an IME composition. Must be parceled in case the user 4647 // rotates the screen during composition. 4648 private boolean mHasComposition; 4649 4650 public UndoInputFilter(Editor editor) { 4651 mEditor = editor; 4652 } 4653 4654 public void saveInstanceState(Parcel parcel) { 4655 parcel.writeInt(mIsUserEdit ? 1 : 0); 4656 parcel.writeInt(mHasComposition ? 1 : 0); 4657 } 4658 4659 public void restoreInstanceState(Parcel parcel) { 4660 mIsUserEdit = parcel.readInt() != 0; 4661 mHasComposition = parcel.readInt() != 0; 4662 } 4663 4664 /** 4665 * Signals that a user-triggered edit is starting. 4666 */ 4667 public void beginBatchEdit() { 4668 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4669 mIsUserEdit = true; 4670 } 4671 4672 public void endBatchEdit() { 4673 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4674 mIsUserEdit = false; 4675 } 4676 4677 @Override 4678 public CharSequence filter(CharSequence source, int start, int end, 4679 Spanned dest, int dstart, int dend) { 4680 if (DEBUG_UNDO) { 4681 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4682 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4683 } 4684 4685 // Check to see if this edit should be tracked for undo. 4686 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4687 return null; 4688 } 4689 4690 // Check for and handle IME composition edits. 4691 if (handleCompositionEdit(source, start, end, dstart)) { 4692 return null; 4693 } 4694 4695 // Handle keyboard edits. 4696 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4697 return null; 4698 } 4699 4700 /** 4701 * Returns true iff the edit was handled, either because it should be ignored or because 4702 * this function created an undo operation for it. 4703 */ 4704 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4705 // Ignore edits while the user is composing. 4706 if (isComposition(source)) { 4707 mHasComposition = true; 4708 return true; 4709 } 4710 final boolean hadComposition = mHasComposition; 4711 mHasComposition = false; 4712 4713 // Check for the transition out of the composing state. 4714 if (hadComposition) { 4715 // If there was no text the user canceled composition. Ignore the edit. 4716 if (start == end) { 4717 return true; 4718 } 4719 4720 // Otherwise the user inserted the composition. 4721 String newText = TextUtils.substring(source, start, end); 4722 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4723 recordEdit(edit, false /* forceMerge */); 4724 return true; 4725 } 4726 4727 // This was neither a composition event nor a transition out of composing. 4728 return false; 4729 } 4730 4731 private void handleKeyboardEdit(CharSequence source, int start, int end, 4732 Spanned dest, int dstart, int dend) { 4733 // An application may install a TextWatcher to provide additional modifications after 4734 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4735 // string). This results in multiple filter() calls for what the user considers to be 4736 // a single operation. Always undo the whole set of changes in one step. 4737 final boolean forceMerge = isInTextWatcher(); 4738 4739 // Build a new operation with all the information from this edit. 4740 String newText = TextUtils.substring(source, start, end); 4741 String oldText = TextUtils.substring(dest, dstart, dend); 4742 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4743 recordEdit(edit, forceMerge); 4744 } 4745 4746 /** 4747 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4748 * If forceMerge is true then the new edit is always merged. 4749 */ 4750 private void recordEdit(EditOperation edit, boolean forceMerge) { 4751 // Fetch the last edit operation and attempt to merge in the new edit. 4752 final UndoManager um = mEditor.mUndoManager; 4753 um.beginUpdate("Edit text"); 4754 EditOperation lastEdit = um.getLastOperation( 4755 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4756 if (lastEdit == null) { 4757 // Add this as the first edit. 4758 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4759 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4760 } else if (forceMerge) { 4761 // Forced merges take priority because they could be the result of a non-user-edit 4762 // change and this case should not create a new undo operation. 4763 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4764 lastEdit.forceMergeWith(edit); 4765 } else if (!mIsUserEdit) { 4766 // An application directly modified the Editable outside of a text edit. Treat this 4767 // as a new change and don't attempt to merge. 4768 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4769 um.commitState(mEditor.mUndoOwner); 4770 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4771 } else if (lastEdit.mergeWith(edit)) { 4772 // Merge succeeded, nothing else to do. 4773 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4774 } else { 4775 // Could not merge with the last edit, so commit the last edit and add this edit. 4776 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4777 um.commitState(mEditor.mUndoOwner); 4778 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4779 } 4780 um.endUpdate(); 4781 } 4782 4783 private boolean canUndoEdit(CharSequence source, int start, int end, 4784 Spanned dest, int dstart, int dend) { 4785 if (!mEditor.mAllowUndo) { 4786 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4787 return false; 4788 } 4789 4790 if (mEditor.mUndoManager.isInUndo()) { 4791 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4792 return false; 4793 } 4794 4795 // Text filters run before input operations are applied. However, some input operations 4796 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4797 // attempt to undo invalid operations. 4798 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4799 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4800 return false; 4801 } 4802 4803 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4804 // on an input field. Skip no-op changes. 4805 if (start == end && dstart == dend) { 4806 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4807 return false; 4808 } 4809 4810 return true; 4811 } 4812 4813 private boolean isComposition(CharSequence source) { 4814 if (!(source instanceof Spannable)) { 4815 return false; 4816 } 4817 // This is a composition edit if the source has a non-zero-length composing span. 4818 Spannable text = (Spannable) source; 4819 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4820 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4821 return composeBegin < composeEnd; 4822 } 4823 4824 private boolean isInTextWatcher() { 4825 CharSequence text = mEditor.mTextView.getText(); 4826 return (text instanceof SpannableStringBuilder) 4827 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4828 } 4829 } 4830 4831 /** 4832 * An operation to undo a single "edit" to a text view. 4833 */ 4834 public static class EditOperation extends UndoOperation<Editor> { 4835 private static final int TYPE_INSERT = 0; 4836 private static final int TYPE_DELETE = 1; 4837 private static final int TYPE_REPLACE = 2; 4838 4839 private int mType; 4840 private String mOldText; 4841 private int mOldTextStart; 4842 private String mNewText; 4843 private int mNewTextStart; 4844 4845 private int mOldCursorPos; 4846 private int mNewCursorPos; 4847 4848 /** 4849 * Constructs an edit operation from a text input operation on editor that replaces the 4850 * oldText starting at dstart with newText. 4851 */ 4852 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 4853 super(editor.mUndoOwner); 4854 mOldText = oldText; 4855 mNewText = newText; 4856 4857 // Determine the type of the edit and store where it occurred. Avoid storing 4858 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4859 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4860 // outside the bounds of the final text). 4861 if (mNewText.length() > 0 && mOldText.length() == 0) { 4862 mType = TYPE_INSERT; 4863 mNewTextStart = dstart; 4864 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4865 mType = TYPE_DELETE; 4866 mOldTextStart = dstart; 4867 } else { 4868 mType = TYPE_REPLACE; 4869 mOldTextStart = mNewTextStart = dstart; 4870 } 4871 4872 // Store cursor data. 4873 mOldCursorPos = editor.mTextView.getSelectionStart(); 4874 mNewCursorPos = dstart + mNewText.length(); 4875 } 4876 4877 public EditOperation(Parcel src, ClassLoader loader) { 4878 super(src, loader); 4879 mType = src.readInt(); 4880 mOldText = src.readString(); 4881 mOldTextStart = src.readInt(); 4882 mNewText = src.readString(); 4883 mNewTextStart = src.readInt(); 4884 mOldCursorPos = src.readInt(); 4885 mNewCursorPos = src.readInt(); 4886 } 4887 4888 @Override 4889 public void writeToParcel(Parcel dest, int flags) { 4890 dest.writeInt(mType); 4891 dest.writeString(mOldText); 4892 dest.writeInt(mOldTextStart); 4893 dest.writeString(mNewText); 4894 dest.writeInt(mNewTextStart); 4895 dest.writeInt(mOldCursorPos); 4896 dest.writeInt(mNewCursorPos); 4897 } 4898 4899 private int getNewTextEnd() { 4900 return mNewTextStart + mNewText.length(); 4901 } 4902 4903 private int getOldTextEnd() { 4904 return mOldTextStart + mOldText.length(); 4905 } 4906 4907 @Override 4908 public void commit() { 4909 } 4910 4911 @Override 4912 public void undo() { 4913 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4914 // Remove the new text and insert the old. 4915 Editor editor = getOwnerData(); 4916 Editable text = (Editable) editor.mTextView.getText(); 4917 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4918 mOldCursorPos); 4919 } 4920 4921 @Override 4922 public void redo() { 4923 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4924 // Remove the old text and insert the new. 4925 Editor editor = getOwnerData(); 4926 Editable text = (Editable) editor.mTextView.getText(); 4927 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4928 mNewCursorPos); 4929 } 4930 4931 /** 4932 * Attempts to merge this existing operation with a new edit. 4933 * @param edit The new edit operation. 4934 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4935 * object unchanged. 4936 */ 4937 private boolean mergeWith(EditOperation edit) { 4938 if (DEBUG_UNDO) { 4939 Log.d(TAG, "mergeWith old " + this); 4940 Log.d(TAG, "mergeWith new " + edit); 4941 } 4942 switch (mType) { 4943 case TYPE_INSERT: 4944 return mergeInsertWith(edit); 4945 case TYPE_DELETE: 4946 return mergeDeleteWith(edit); 4947 case TYPE_REPLACE: 4948 return mergeReplaceWith(edit); 4949 default: 4950 return false; 4951 } 4952 } 4953 4954 private boolean mergeInsertWith(EditOperation edit) { 4955 // Only merge continuous insertions. 4956 if (edit.mType != TYPE_INSERT) { 4957 return false; 4958 } 4959 // Only merge insertions that are contiguous. 4960 if (getNewTextEnd() != edit.mNewTextStart) { 4961 return false; 4962 } 4963 mNewText += edit.mNewText; 4964 mNewCursorPos = edit.mNewCursorPos; 4965 return true; 4966 } 4967 4968 // TODO: Support forward delete. 4969 private boolean mergeDeleteWith(EditOperation edit) { 4970 // Only merge continuous deletes. 4971 if (edit.mType != TYPE_DELETE) { 4972 return false; 4973 } 4974 // Only merge deletions that are contiguous. 4975 if (mOldTextStart != edit.getOldTextEnd()) { 4976 return false; 4977 } 4978 mOldTextStart = edit.mOldTextStart; 4979 mOldText = edit.mOldText + mOldText; 4980 mNewCursorPos = edit.mNewCursorPos; 4981 return true; 4982 } 4983 4984 private boolean mergeReplaceWith(EditOperation edit) { 4985 // Replacements can merge only with adjacent inserts. 4986 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 4987 return false; 4988 } 4989 mOldText += edit.mOldText; 4990 mNewText += edit.mNewText; 4991 mNewCursorPos = edit.mNewCursorPos; 4992 return true; 4993 } 4994 4995 /** 4996 * Forcibly creates a single merged edit operation by simulating the entire text 4997 * contents being replaced. 4998 */ 4999 public void forceMergeWith(EditOperation edit) { 5000 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5001 Editor editor = getOwnerData(); 5002 5003 // Copy the text of the current field. 5004 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5005 // but would require two parallel implementations of modifyText() because Editable and 5006 // StringBuilder do not share an interface for replace/delete/insert. 5007 Editable editable = (Editable) editor.mTextView.getText(); 5008 Editable originalText = new SpannableStringBuilder(editable.toString()); 5009 5010 // Roll back the last operation. 5011 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5012 mOldCursorPos); 5013 5014 // Clone the text again and apply the new operation. 5015 Editable finalText = new SpannableStringBuilder(editable.toString()); 5016 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5017 edit.mNewTextStart, edit.mNewCursorPos); 5018 5019 // Convert this operation into a non-mergeable replacement of the entire string. 5020 mType = TYPE_REPLACE; 5021 mNewText = finalText.toString(); 5022 mNewTextStart = 0; 5023 mOldText = originalText.toString(); 5024 mOldTextStart = 0; 5025 mNewCursorPos = edit.mNewCursorPos; 5026 // mOldCursorPos is unchanged. 5027 } 5028 5029 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5030 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5031 // Apply the edit if it is still valid. 5032 if (isValidRange(text, deleteFrom, deleteTo) && 5033 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5034 if (deleteFrom != deleteTo) { 5035 text.delete(deleteFrom, deleteTo); 5036 } 5037 if (newText.length() != 0) { 5038 text.insert(newTextInsertAt, newText); 5039 } 5040 } 5041 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5042 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5043 // TODO: Select all the text that was undone. 5044 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5045 Selection.setSelection(text, newCursorPos); 5046 } 5047 } 5048 5049 private String getTypeString() { 5050 switch (mType) { 5051 case TYPE_INSERT: 5052 return "insert"; 5053 case TYPE_DELETE: 5054 return "delete"; 5055 case TYPE_REPLACE: 5056 return "replace"; 5057 default: 5058 return ""; 5059 } 5060 } 5061 5062 @Override 5063 public String toString() { 5064 return "[mType=" + getTypeString() + ", " + 5065 "mOldText=" + mOldText + ", " + 5066 "mOldTextStart=" + mOldTextStart + ", " + 5067 "mNewText=" + mNewText + ", " + 5068 "mNewTextStart=" + mNewTextStart + ", " + 5069 "mOldCursorPos=" + mOldCursorPos + ", " + 5070 "mNewCursorPos=" + mNewCursorPos + "]"; 5071 } 5072 5073 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5074 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5075 @Override 5076 public EditOperation createFromParcel(Parcel in) { 5077 return new EditOperation(in, null); 5078 } 5079 5080 @Override 5081 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5082 return new EditOperation(in, loader); 5083 } 5084 5085 @Override 5086 public EditOperation[] newArray(int size) { 5087 return new EditOperation[size]; 5088 } 5089 }; 5090 } 5091} 5092