Editor.java revision eea5a9e0de5825bf3629ad52a51a0dcf5f064fe5
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 TextRenderNode { 148 RenderNode renderNode; 149 boolean isDirty; 150 public TextRenderNode(String name) { 151 isDirty = true; 152 renderNode = RenderNode.create(name, null); 153 } 154 boolean needsRecord() { return isDirty || !renderNode.isValid(); } 155 } 156 TextRenderNode[] mTextRenderNodes; 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 (mTextRenderNodes != null) { 363 for (int i = 0; i < mTextRenderNodes.length; i++) { 364 RenderNode displayList = mTextRenderNodes[i] != null 365 ? mTextRenderNodes[i].renderNode : 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 (mTextRenderNodes == null) { 1442 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.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 (mTextRenderNodes[blockIndex] != null) { 1464 mTextRenderNodes[blockIndex].isDirty = true; 1465 } 1466 searchStartIndex = blockIndex + 1; 1467 } 1468 1469 if (mTextRenderNodes[blockIndex] == null) { 1470 mTextRenderNodes[blockIndex] = 1471 new TextRenderNode("Text " + blockIndex); 1472 } 1473 1474 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1475 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 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 mTextRenderNodes[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 1519 endOfPreviousBlock = blockEndLine; 1520 } 1521 1522 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1523 } else { 1524 // Boring layout is used for empty and hint text 1525 layout.drawText(canvas, firstLine, lastLine); 1526 } 1527 } 1528 1529 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1530 int searchStartIndex) { 1531 int length = mTextRenderNodes.length; 1532 for (int i = searchStartIndex; i < length; i++) { 1533 boolean blockIndexFound = false; 1534 for (int j = 0; j < numberOfBlocks; j++) { 1535 if (blockIndices[j] == i) { 1536 blockIndexFound = true; 1537 break; 1538 } 1539 } 1540 if (blockIndexFound) continue; 1541 return i; 1542 } 1543 1544 // No available index found, the pool has to grow 1545 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1546 return length; 1547 } 1548 1549 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1550 final boolean translate = cursorOffsetVertical != 0; 1551 if (translate) canvas.translate(0, cursorOffsetVertical); 1552 for (int i = 0; i < mCursorCount; i++) { 1553 mCursorDrawable[i].draw(canvas); 1554 } 1555 if (translate) canvas.translate(0, -cursorOffsetVertical); 1556 } 1557 1558 /** 1559 * Invalidates all the sub-display lists that overlap the specified character range 1560 */ 1561 void invalidateTextDisplayList(Layout layout, int start, int end) { 1562 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1563 final int firstLine = layout.getLineForOffset(start); 1564 final int lastLine = layout.getLineForOffset(end); 1565 1566 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1567 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1568 int[] blockIndices = dynamicLayout.getBlockIndices(); 1569 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1570 1571 int i = 0; 1572 // Skip the blocks before firstLine 1573 while (i < numberOfBlocks) { 1574 if (blockEndLines[i] >= firstLine) break; 1575 i++; 1576 } 1577 1578 // Invalidate all subsequent blocks until lastLine is passed 1579 while (i < numberOfBlocks) { 1580 final int blockIndex = blockIndices[i]; 1581 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1582 mTextRenderNodes[blockIndex].isDirty = true; 1583 } 1584 if (blockEndLines[i] >= lastLine) break; 1585 i++; 1586 } 1587 } 1588 } 1589 1590 void invalidateTextDisplayList() { 1591 if (mTextRenderNodes != null) { 1592 for (int i = 0; i < mTextRenderNodes.length; i++) { 1593 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1594 } 1595 } 1596 } 1597 1598 void updateCursorsPositions() { 1599 if (mTextView.mCursorDrawableRes == 0) { 1600 mCursorCount = 0; 1601 return; 1602 } 1603 1604 Layout layout = mTextView.getLayout(); 1605 Layout hintLayout = mTextView.getHintLayout(); 1606 final int offset = mTextView.getSelectionStart(); 1607 final int line = layout.getLineForOffset(offset); 1608 final int top = layout.getLineTop(line); 1609 final int bottom = layout.getLineTop(line + 1); 1610 1611 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1612 1613 int middle = bottom; 1614 if (mCursorCount == 2) { 1615 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1616 middle = (top + bottom) >> 1; 1617 } 1618 1619 boolean clamped = layout.shouldClampCursor(line); 1620 updateCursorPosition(0, top, middle, 1621 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1622 1623 if (mCursorCount == 2) { 1624 updateCursorPosition(1, middle, bottom, 1625 layout.getSecondaryHorizontal(offset, clamped)); 1626 } 1627 } 1628 1629 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1630 boolean clamped) { 1631 if (TextUtils.isEmpty(layout.getText()) && 1632 hintLayout != null && 1633 !TextUtils.isEmpty(hintLayout.getText())) { 1634 return hintLayout.getPrimaryHorizontal(offset, clamped); 1635 } else { 1636 return layout.getPrimaryHorizontal(offset, clamped); 1637 } 1638 } 1639 1640 /** 1641 * @return true if the selection mode was actually started. 1642 */ 1643 private boolean startSelectionActionModeWithoutSelection() { 1644 if (mSelectionActionMode != null) { 1645 // Selection action mode is already started 1646 // TODO: revisit invocations to minimize this case. 1647 mSelectionActionMode.invalidate(); 1648 return false; 1649 } 1650 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1651 mSelectionActionMode = mTextView.startActionMode( 1652 actionModeCallback, ActionMode.TYPE_FLOATING); 1653 return mSelectionActionMode != null; 1654 } 1655 1656 /** 1657 * Starts a Selection Action Mode with the current selection and enters drag mode. This should 1658 * be used whenever the mode is started from a touch event. 1659 * 1660 * @return true if the selection mode was actually started. 1661 */ 1662 private boolean startSelectionActionModeWithSelectionAndStartDrag() { 1663 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1664 if (selectionStarted) { 1665 getSelectionController().enterDrag(); 1666 } 1667 return selectionStarted; 1668 } 1669 1670 /** 1671 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1672 * are shown. This should be used when the mode is started from a non-touch event. 1673 * 1674 * @return true if the selection mode was actually started. 1675 */ 1676 boolean startSelectionActionModeWithSelection() { 1677 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1678 if (selectionStarted) { 1679 getSelectionController().show(); 1680 } 1681 return selectionStarted; 1682 } 1683 1684 private boolean startSelectionActionModeWithSelectionInternal() { 1685 if (mSelectionActionMode != null) { 1686 // Selection action mode is already started 1687 mSelectionActionMode.invalidate(); 1688 return false; 1689 } 1690 1691 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1692 Log.w(TextView.LOG_TAG, 1693 "TextView does not support text selection. Action mode cancelled."); 1694 return false; 1695 } 1696 1697 if (!mTextView.hasSelection()) { 1698 // There may already be a selection on device rotation 1699 if (!selectCurrentWord()) { 1700 // No word found under cursor or text selection not permitted. 1701 return false; 1702 } 1703 } 1704 1705 boolean willExtract = extractedTextModeWillBeStarted(); 1706 1707 // Do not start the action mode when extracted text will show up full screen, which would 1708 // immediately hide the newly created action bar and would be visually distracting. 1709 if (!willExtract) { 1710 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1711 mSelectionActionMode = mTextView.startActionMode( 1712 actionModeCallback, ActionMode.TYPE_FLOATING); 1713 } 1714 1715 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1716 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1717 // Show the IME to be able to replace text, except when selecting non editable text. 1718 final InputMethodManager imm = InputMethodManager.peekInstance(); 1719 if (imm != null) { 1720 imm.showSoftInput(mTextView, 0, null); 1721 } 1722 } 1723 return selectionStarted; 1724 } 1725 1726 private boolean extractedTextModeWillBeStarted() { 1727 if (!(mTextView instanceof ExtractEditText)) { 1728 final InputMethodManager imm = InputMethodManager.peekInstance(); 1729 return imm != null && imm.isFullscreenMode(); 1730 } 1731 return false; 1732 } 1733 1734 /** 1735 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1736 * the current cursor position or selection range. This method is consistent with the 1737 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1738 */ 1739 private boolean shouldOfferToShowSuggestions() { 1740 CharSequence text = mTextView.getText(); 1741 if (!(text instanceof Spannable)) return false; 1742 1743 final Spannable spannable = (Spannable) text; 1744 final int selectionStart = mTextView.getSelectionStart(); 1745 final int selectionEnd = mTextView.getSelectionEnd(); 1746 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1747 SuggestionSpan.class); 1748 if (suggestionSpans.length == 0) { 1749 return false; 1750 } 1751 if (selectionStart == selectionEnd) { 1752 // Spans overlap the cursor. 1753 return true; 1754 } 1755 int minSpanStart = mTextView.getText().length(); 1756 int maxSpanEnd = 0; 1757 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1758 int unionOfSpansCoveringSelectionStartEnd = 0; 1759 for (int i = 0; i < suggestionSpans.length; i++) { 1760 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1761 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1762 minSpanStart = Math.min(minSpanStart, spanStart); 1763 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1764 if (selectionStart < spanStart || selectionStart > spanEnd) { 1765 // The span doesn't cover the current selection start point. 1766 continue; 1767 } 1768 unionOfSpansCoveringSelectionStartStart = 1769 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1770 unionOfSpansCoveringSelectionStartEnd = 1771 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1772 } 1773 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1774 // No spans cover the selection start point. 1775 return false; 1776 } 1777 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1778 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1779 // There is a span that is not covered by the union. In this case, we soouldn't offer 1780 // to show suggestions as it's confusing. 1781 return false; 1782 } 1783 return true; 1784 } 1785 1786 /** 1787 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1788 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1789 */ 1790 private boolean isCursorInsideEasyCorrectionSpan() { 1791 Spannable spannable = (Spannable) mTextView.getText(); 1792 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1793 mTextView.getSelectionEnd(), SuggestionSpan.class); 1794 for (int i = 0; i < suggestionSpans.length; i++) { 1795 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1796 return true; 1797 } 1798 } 1799 return false; 1800 } 1801 1802 void onTouchUpEvent(MotionEvent event) { 1803 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1804 hideControllers(); 1805 CharSequence text = mTextView.getText(); 1806 if (!selectAllGotFocus && text.length() > 0) { 1807 // Move cursor 1808 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1809 Selection.setSelection((Spannable) text, offset); 1810 if (mSpellChecker != null) { 1811 // When the cursor moves, the word that was typed may need spell check 1812 mSpellChecker.onSelectionChanged(); 1813 } 1814 if (!extractedTextModeWillBeStarted()) { 1815 if (isCursorInsideEasyCorrectionSpan()) { 1816 mShowSuggestionRunnable = new Runnable() { 1817 public void run() { 1818 showSuggestions(); 1819 } 1820 }; 1821 // removeCallbacks is performed on every touch 1822 mTextView.postDelayed(mShowSuggestionRunnable, 1823 ViewConfiguration.getDoubleTapTimeout()); 1824 } else if (hasInsertionController()) { 1825 getInsertionController().show(); 1826 } 1827 } 1828 } 1829 } 1830 1831 protected void stopSelectionActionMode() { 1832 if (mSelectionActionMode != null) { 1833 // This will hide the mSelectionModifierCursorController 1834 mSelectionActionMode.finish(); 1835 } 1836 } 1837 1838 /** 1839 * @return True if this view supports insertion handles. 1840 */ 1841 boolean hasInsertionController() { 1842 return mInsertionControllerEnabled; 1843 } 1844 1845 /** 1846 * @return True if this view supports selection handles. 1847 */ 1848 boolean hasSelectionController() { 1849 return mSelectionControllerEnabled; 1850 } 1851 1852 InsertionPointCursorController getInsertionController() { 1853 if (!mInsertionControllerEnabled) { 1854 return null; 1855 } 1856 1857 if (mInsertionPointCursorController == null) { 1858 mInsertionPointCursorController = new InsertionPointCursorController(); 1859 1860 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1861 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1862 } 1863 1864 return mInsertionPointCursorController; 1865 } 1866 1867 SelectionModifierCursorController getSelectionController() { 1868 if (!mSelectionControllerEnabled) { 1869 return null; 1870 } 1871 1872 if (mSelectionModifierCursorController == null) { 1873 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1874 1875 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1876 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1877 } 1878 1879 return mSelectionModifierCursorController; 1880 } 1881 1882 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1883 if (mCursorDrawable[cursorIndex] == null) 1884 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1885 mTextView.mCursorDrawableRes); 1886 1887 if (mTempRect == null) mTempRect = new Rect(); 1888 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1889 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1890 horizontal = Math.max(0.5f, horizontal - 0.5f); 1891 final int left = (int) (horizontal) - mTempRect.left; 1892 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1893 bottom + mTempRect.bottom); 1894 } 1895 1896 /** 1897 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1898 * a dictionary) from the current input method, provided by it calling 1899 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1900 * implementation flashes the background of the corrected word to provide feedback to the user. 1901 * 1902 * @param info The auto correct info about the text that was corrected. 1903 */ 1904 public void onCommitCorrection(CorrectionInfo info) { 1905 if (mCorrectionHighlighter == null) { 1906 mCorrectionHighlighter = new CorrectionHighlighter(); 1907 } else { 1908 mCorrectionHighlighter.invalidate(false); 1909 } 1910 1911 mCorrectionHighlighter.highlight(info); 1912 } 1913 1914 void showSuggestions() { 1915 if (mSuggestionsPopupWindow == null) { 1916 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1917 } 1918 hideControllers(); 1919 mSuggestionsPopupWindow.show(); 1920 } 1921 1922 boolean areSuggestionsShown() { 1923 return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing(); 1924 } 1925 1926 void onScrollChanged() { 1927 if (mPositionListener != null) { 1928 mPositionListener.onScrollChanged(); 1929 } 1930 if (mSelectionActionMode != null) { 1931 mSelectionActionMode.invalidateContentRect(); 1932 } 1933 } 1934 1935 /** 1936 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1937 */ 1938 private boolean shouldBlink() { 1939 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1940 1941 final int start = mTextView.getSelectionStart(); 1942 if (start < 0) return false; 1943 1944 final int end = mTextView.getSelectionEnd(); 1945 if (end < 0) return false; 1946 1947 return start == end; 1948 } 1949 1950 void makeBlink() { 1951 if (shouldBlink()) { 1952 mShowCursor = SystemClock.uptimeMillis(); 1953 if (mBlink == null) mBlink = new Blink(); 1954 mBlink.removeCallbacks(mBlink); 1955 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 1956 } else { 1957 if (mBlink != null) mBlink.removeCallbacks(mBlink); 1958 } 1959 } 1960 1961 private class Blink extends Handler implements Runnable { 1962 private boolean mCancelled; 1963 1964 public void run() { 1965 if (mCancelled) { 1966 return; 1967 } 1968 1969 removeCallbacks(Blink.this); 1970 1971 if (shouldBlink()) { 1972 if (mTextView.getLayout() != null) { 1973 mTextView.invalidateCursorPath(); 1974 } 1975 1976 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 1977 } 1978 } 1979 1980 void cancel() { 1981 if (!mCancelled) { 1982 removeCallbacks(Blink.this); 1983 mCancelled = true; 1984 } 1985 } 1986 1987 void uncancel() { 1988 mCancelled = false; 1989 } 1990 } 1991 1992 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 1993 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 1994 com.android.internal.R.layout.text_drag_thumbnail, null); 1995 1996 if (shadowView == null) { 1997 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 1998 } 1999 2000 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2001 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2002 } 2003 shadowView.setText(text); 2004 shadowView.setTextColor(mTextView.getTextColors()); 2005 2006 shadowView.setTextAppearance(mTextView.getContext(), R.styleable.Theme_textAppearanceLarge); 2007 shadowView.setGravity(Gravity.CENTER); 2008 2009 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2010 ViewGroup.LayoutParams.WRAP_CONTENT)); 2011 2012 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2013 shadowView.measure(size, size); 2014 2015 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2016 shadowView.invalidate(); 2017 return new DragShadowBuilder(shadowView); 2018 } 2019 2020 private static class DragLocalState { 2021 public TextView sourceTextView; 2022 public int start, end; 2023 2024 public DragLocalState(TextView sourceTextView, int start, int end) { 2025 this.sourceTextView = sourceTextView; 2026 this.start = start; 2027 this.end = end; 2028 } 2029 } 2030 2031 void onDrop(DragEvent event) { 2032 StringBuilder content = new StringBuilder(""); 2033 ClipData clipData = event.getClipData(); 2034 final int itemCount = clipData.getItemCount(); 2035 for (int i=0; i < itemCount; i++) { 2036 Item item = clipData.getItemAt(i); 2037 content.append(item.coerceToStyledText(mTextView.getContext())); 2038 } 2039 2040 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2041 2042 Object localState = event.getLocalState(); 2043 DragLocalState dragLocalState = null; 2044 if (localState instanceof DragLocalState) { 2045 dragLocalState = (DragLocalState) localState; 2046 } 2047 boolean dragDropIntoItself = dragLocalState != null && 2048 dragLocalState.sourceTextView == mTextView; 2049 2050 if (dragDropIntoItself) { 2051 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2052 // A drop inside the original selection discards the drop. 2053 return; 2054 } 2055 } 2056 2057 final int originalLength = mTextView.getText().length(); 2058 int min = offset; 2059 int max = offset; 2060 2061 Selection.setSelection((Spannable) mTextView.getText(), max); 2062 mTextView.replaceText_internal(min, max, content); 2063 2064 if (dragDropIntoItself) { 2065 int dragSourceStart = dragLocalState.start; 2066 int dragSourceEnd = dragLocalState.end; 2067 if (max <= dragSourceStart) { 2068 // Inserting text before selection has shifted positions 2069 final int shift = mTextView.getText().length() - originalLength; 2070 dragSourceStart += shift; 2071 dragSourceEnd += shift; 2072 } 2073 2074 // Delete original selection 2075 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2076 2077 // Make sure we do not leave two adjacent spaces. 2078 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2079 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2080 if (nextCharIdx > prevCharIdx + 1) { 2081 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2082 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2083 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2084 } 2085 } 2086 } 2087 } 2088 2089 public void addSpanWatchers(Spannable text) { 2090 final int textLength = text.length(); 2091 2092 if (mKeyListener != null) { 2093 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2094 } 2095 2096 if (mSpanController == null) { 2097 mSpanController = new SpanController(); 2098 } 2099 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2100 } 2101 2102 /** 2103 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2104 * pop-up should be displayed. 2105 * Also monitors {@link Selection} to call back to the attached input method. 2106 */ 2107 class SpanController implements SpanWatcher { 2108 2109 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2110 2111 private EasyEditPopupWindow mPopupWindow; 2112 2113 private Runnable mHidePopup; 2114 2115 // This function is pure but inner classes can't have static functions 2116 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2117 final Object span) { 2118 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2119 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2120 } 2121 2122 @Override 2123 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2124 if (isNonIntermediateSelectionSpan(text, span)) { 2125 sendUpdateSelection(); 2126 } else if (span instanceof EasyEditSpan) { 2127 if (mPopupWindow == null) { 2128 mPopupWindow = new EasyEditPopupWindow(); 2129 mHidePopup = new Runnable() { 2130 @Override 2131 public void run() { 2132 hide(); 2133 } 2134 }; 2135 } 2136 2137 // Make sure there is only at most one EasyEditSpan in the text 2138 if (mPopupWindow.mEasyEditSpan != null) { 2139 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2140 } 2141 2142 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2143 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2144 @Override 2145 public void onDeleteClick(EasyEditSpan span) { 2146 Editable editable = (Editable) mTextView.getText(); 2147 int start = editable.getSpanStart(span); 2148 int end = editable.getSpanEnd(span); 2149 if (start >= 0 && end >= 0) { 2150 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2151 mTextView.deleteText_internal(start, end); 2152 } 2153 editable.removeSpan(span); 2154 } 2155 }); 2156 2157 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2158 // The window is not visible yet, ignore the text change. 2159 return; 2160 } 2161 2162 if (mTextView.getLayout() == null) { 2163 // The view has not been laid out yet, ignore the text change 2164 return; 2165 } 2166 2167 if (extractedTextModeWillBeStarted()) { 2168 // The input is in extract mode. Do not handle the easy edit in 2169 // the original TextView, as the ExtractEditText will do 2170 return; 2171 } 2172 2173 mPopupWindow.show(); 2174 mTextView.removeCallbacks(mHidePopup); 2175 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2176 } 2177 } 2178 2179 @Override 2180 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2181 if (isNonIntermediateSelectionSpan(text, span)) { 2182 sendUpdateSelection(); 2183 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2184 hide(); 2185 } 2186 } 2187 2188 @Override 2189 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2190 int newStart, int newEnd) { 2191 if (isNonIntermediateSelectionSpan(text, span)) { 2192 sendUpdateSelection(); 2193 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2194 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2195 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2196 text.removeSpan(easyEditSpan); 2197 } 2198 } 2199 2200 public void hide() { 2201 if (mPopupWindow != null) { 2202 mPopupWindow.hide(); 2203 mTextView.removeCallbacks(mHidePopup); 2204 } 2205 } 2206 2207 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2208 try { 2209 PendingIntent pendingIntent = span.getPendingIntent(); 2210 if (pendingIntent != null) { 2211 Intent intent = new Intent(); 2212 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2213 pendingIntent.send(mTextView.getContext(), 0, intent); 2214 } 2215 } catch (CanceledException e) { 2216 // This should not happen, as we should try to send the intent only once. 2217 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2218 } 2219 } 2220 } 2221 2222 /** 2223 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2224 */ 2225 private interface EasyEditDeleteListener { 2226 2227 /** 2228 * Clicks the delete pop-up. 2229 */ 2230 void onDeleteClick(EasyEditSpan span); 2231 } 2232 2233 /** 2234 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2235 * by {@link SpanController}. 2236 */ 2237 private class EasyEditPopupWindow extends PinnedPopupWindow 2238 implements OnClickListener { 2239 private static final int POPUP_TEXT_LAYOUT = 2240 com.android.internal.R.layout.text_edit_action_popup_text; 2241 private TextView mDeleteTextView; 2242 private EasyEditSpan mEasyEditSpan; 2243 private EasyEditDeleteListener mOnDeleteListener; 2244 2245 @Override 2246 protected void createPopupWindow() { 2247 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2248 com.android.internal.R.attr.textSelectHandleWindowStyle); 2249 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2250 mPopupWindow.setClippingEnabled(true); 2251 } 2252 2253 @Override 2254 protected void initContentView() { 2255 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2256 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2257 mContentView = linearLayout; 2258 mContentView.setBackgroundResource( 2259 com.android.internal.R.drawable.text_edit_side_paste_window); 2260 2261 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2262 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2263 2264 LayoutParams wrapContent = new LayoutParams( 2265 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2266 2267 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2268 mDeleteTextView.setLayoutParams(wrapContent); 2269 mDeleteTextView.setText(com.android.internal.R.string.delete); 2270 mDeleteTextView.setOnClickListener(this); 2271 mContentView.addView(mDeleteTextView); 2272 } 2273 2274 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2275 mEasyEditSpan = easyEditSpan; 2276 } 2277 2278 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2279 mOnDeleteListener = listener; 2280 } 2281 2282 @Override 2283 public void onClick(View view) { 2284 if (view == mDeleteTextView 2285 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2286 && mOnDeleteListener != null) { 2287 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2288 } 2289 } 2290 2291 @Override 2292 public void hide() { 2293 if (mEasyEditSpan != null) { 2294 mEasyEditSpan.setDeleteEnabled(false); 2295 } 2296 mOnDeleteListener = null; 2297 super.hide(); 2298 } 2299 2300 @Override 2301 protected int getTextOffset() { 2302 // Place the pop-up at the end of the span 2303 Editable editable = (Editable) mTextView.getText(); 2304 return editable.getSpanEnd(mEasyEditSpan); 2305 } 2306 2307 @Override 2308 protected int getVerticalLocalPosition(int line) { 2309 return mTextView.getLayout().getLineBottom(line); 2310 } 2311 2312 @Override 2313 protected int clipVertically(int positionY) { 2314 // As we display the pop-up below the span, no vertical clipping is required. 2315 return positionY; 2316 } 2317 } 2318 2319 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2320 // 3 handles 2321 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2322 // 1 CursorAnchorInfoNotifier 2323 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2324 private TextViewPositionListener[] mPositionListeners = 2325 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2326 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2327 private boolean mPositionHasChanged = true; 2328 // Absolute position of the TextView with respect to its parent window 2329 private int mPositionX, mPositionY; 2330 private int mNumberOfListeners; 2331 private boolean mScrollHasChanged; 2332 final int[] mTempCoords = new int[2]; 2333 2334 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2335 if (mNumberOfListeners == 0) { 2336 updatePosition(); 2337 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2338 vto.addOnPreDrawListener(this); 2339 } 2340 2341 int emptySlotIndex = -1; 2342 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2343 TextViewPositionListener listener = mPositionListeners[i]; 2344 if (listener == positionListener) { 2345 return; 2346 } else if (emptySlotIndex < 0 && listener == null) { 2347 emptySlotIndex = i; 2348 } 2349 } 2350 2351 mPositionListeners[emptySlotIndex] = positionListener; 2352 mCanMove[emptySlotIndex] = canMove; 2353 mNumberOfListeners++; 2354 } 2355 2356 public void removeSubscriber(TextViewPositionListener positionListener) { 2357 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2358 if (mPositionListeners[i] == positionListener) { 2359 mPositionListeners[i] = null; 2360 mNumberOfListeners--; 2361 break; 2362 } 2363 } 2364 2365 if (mNumberOfListeners == 0) { 2366 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2367 vto.removeOnPreDrawListener(this); 2368 } 2369 } 2370 2371 public int getPositionX() { 2372 return mPositionX; 2373 } 2374 2375 public int getPositionY() { 2376 return mPositionY; 2377 } 2378 2379 @Override 2380 public boolean onPreDraw() { 2381 updatePosition(); 2382 2383 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2384 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2385 TextViewPositionListener positionListener = mPositionListeners[i]; 2386 if (positionListener != null) { 2387 positionListener.updatePosition(mPositionX, mPositionY, 2388 mPositionHasChanged, mScrollHasChanged); 2389 } 2390 } 2391 } 2392 2393 mScrollHasChanged = false; 2394 return true; 2395 } 2396 2397 private void updatePosition() { 2398 mTextView.getLocationInWindow(mTempCoords); 2399 2400 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2401 2402 mPositionX = mTempCoords[0]; 2403 mPositionY = mTempCoords[1]; 2404 } 2405 2406 public void onScrollChanged() { 2407 mScrollHasChanged = true; 2408 } 2409 } 2410 2411 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2412 protected PopupWindow mPopupWindow; 2413 protected ViewGroup mContentView; 2414 int mPositionX, mPositionY; 2415 2416 protected abstract void createPopupWindow(); 2417 protected abstract void initContentView(); 2418 protected abstract int getTextOffset(); 2419 protected abstract int getVerticalLocalPosition(int line); 2420 protected abstract int clipVertically(int positionY); 2421 2422 public PinnedPopupWindow() { 2423 createPopupWindow(); 2424 2425 mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 2426 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2427 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2428 2429 initContentView(); 2430 2431 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2432 ViewGroup.LayoutParams.WRAP_CONTENT); 2433 mContentView.setLayoutParams(wrapContent); 2434 2435 mPopupWindow.setContentView(mContentView); 2436 } 2437 2438 public void show() { 2439 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2440 2441 computeLocalPosition(); 2442 2443 final PositionListener positionListener = getPositionListener(); 2444 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2445 } 2446 2447 protected void measureContent() { 2448 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2449 mContentView.measure( 2450 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2451 View.MeasureSpec.AT_MOST), 2452 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2453 View.MeasureSpec.AT_MOST)); 2454 } 2455 2456 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2457 * positioned according to viewportToContentHorizontalOffset. 2458 * 2459 * This method assumes that mContentView has properly been measured from its content. */ 2460 private void computeLocalPosition() { 2461 measureContent(); 2462 final int width = mContentView.getMeasuredWidth(); 2463 final int offset = getTextOffset(); 2464 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2465 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2466 2467 final int line = mTextView.getLayout().getLineForOffset(offset); 2468 mPositionY = getVerticalLocalPosition(line); 2469 mPositionY += mTextView.viewportToContentVerticalOffset(); 2470 } 2471 2472 private void updatePosition(int parentPositionX, int parentPositionY) { 2473 int positionX = parentPositionX + mPositionX; 2474 int positionY = parentPositionY + mPositionY; 2475 2476 positionY = clipVertically(positionY); 2477 2478 // Horizontal clipping 2479 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2480 final int width = mContentView.getMeasuredWidth(); 2481 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2482 positionX = Math.max(0, positionX); 2483 2484 if (isShowing()) { 2485 mPopupWindow.update(positionX, positionY, -1, -1); 2486 } else { 2487 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2488 positionX, positionY); 2489 } 2490 } 2491 2492 public void hide() { 2493 mPopupWindow.dismiss(); 2494 getPositionListener().removeSubscriber(this); 2495 } 2496 2497 @Override 2498 public void updatePosition(int parentPositionX, int parentPositionY, 2499 boolean parentPositionChanged, boolean parentScrolled) { 2500 // Either parentPositionChanged or parentScrolled is true, check if still visible 2501 if (isShowing() && isOffsetVisible(getTextOffset())) { 2502 if (parentScrolled) computeLocalPosition(); 2503 updatePosition(parentPositionX, parentPositionY); 2504 } else { 2505 hide(); 2506 } 2507 } 2508 2509 public boolean isShowing() { 2510 return mPopupWindow.isShowing(); 2511 } 2512 } 2513 2514 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2515 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2516 private static final int ADD_TO_DICTIONARY = -1; 2517 private static final int DELETE_TEXT = -2; 2518 private SuggestionInfo[] mSuggestionInfos; 2519 private int mNumberOfSuggestions; 2520 private boolean mCursorWasVisibleBeforeSuggestions; 2521 private boolean mIsShowingUp = false; 2522 private SuggestionAdapter mSuggestionsAdapter; 2523 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2524 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2525 2526 private class CustomPopupWindow extends PopupWindow { 2527 public CustomPopupWindow(Context context, int defStyleAttr) { 2528 super(context, null, defStyleAttr); 2529 } 2530 2531 @Override 2532 public void dismiss() { 2533 super.dismiss(); 2534 2535 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2536 2537 // Safe cast since show() checks that mTextView.getText() is an Editable 2538 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2539 2540 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2541 if (hasInsertionController()) { 2542 getInsertionController().show(); 2543 } 2544 } 2545 } 2546 2547 public SuggestionsPopupWindow() { 2548 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2549 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2550 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2551 } 2552 2553 @Override 2554 protected void createPopupWindow() { 2555 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2556 com.android.internal.R.attr.textSuggestionsWindowStyle); 2557 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2558 mPopupWindow.setFocusable(true); 2559 mPopupWindow.setClippingEnabled(false); 2560 } 2561 2562 @Override 2563 protected void initContentView() { 2564 ListView listView = new ListView(mTextView.getContext()); 2565 mSuggestionsAdapter = new SuggestionAdapter(); 2566 listView.setAdapter(mSuggestionsAdapter); 2567 listView.setOnItemClickListener(this); 2568 mContentView = listView; 2569 2570 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2571 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2572 for (int i = 0; i < mSuggestionInfos.length; i++) { 2573 mSuggestionInfos[i] = new SuggestionInfo(); 2574 } 2575 } 2576 2577 public boolean isShowingUp() { 2578 return mIsShowingUp; 2579 } 2580 2581 public void onParentLostFocus() { 2582 mIsShowingUp = false; 2583 } 2584 2585 private class SuggestionInfo { 2586 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2587 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2588 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2589 SpannableStringBuilder text = new SpannableStringBuilder(); 2590 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2591 android.R.style.TextAppearance_SuggestionHighlight); 2592 } 2593 2594 private class SuggestionAdapter extends BaseAdapter { 2595 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2596 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2597 2598 @Override 2599 public int getCount() { 2600 return mNumberOfSuggestions; 2601 } 2602 2603 @Override 2604 public Object getItem(int position) { 2605 return mSuggestionInfos[position]; 2606 } 2607 2608 @Override 2609 public long getItemId(int position) { 2610 return position; 2611 } 2612 2613 @Override 2614 public View getView(int position, View convertView, ViewGroup parent) { 2615 TextView textView = (TextView) convertView; 2616 2617 if (textView == null) { 2618 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2619 parent, false); 2620 } 2621 2622 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2623 textView.setText(suggestionInfo.text); 2624 2625 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2626 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2627 textView.setBackgroundColor(Color.TRANSPARENT); 2628 } else { 2629 textView.setBackgroundColor(Color.WHITE); 2630 } 2631 2632 return textView; 2633 } 2634 } 2635 2636 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2637 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2638 final int flag1 = span1.getFlags(); 2639 final int flag2 = span2.getFlags(); 2640 if (flag1 != flag2) { 2641 // The order here should match what is used in updateDrawState 2642 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2643 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2644 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2645 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2646 if (easy1 && !misspelled1) return -1; 2647 if (easy2 && !misspelled2) return 1; 2648 if (misspelled1) return -1; 2649 if (misspelled2) return 1; 2650 } 2651 2652 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2653 } 2654 } 2655 2656 /** 2657 * Returns the suggestion spans that cover the current cursor position. The suggestion 2658 * spans are sorted according to the length of text that they are attached to. 2659 */ 2660 private SuggestionSpan[] getSuggestionSpans() { 2661 int pos = mTextView.getSelectionStart(); 2662 Spannable spannable = (Spannable) mTextView.getText(); 2663 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2664 2665 mSpansLengths.clear(); 2666 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2667 int start = spannable.getSpanStart(suggestionSpan); 2668 int end = spannable.getSpanEnd(suggestionSpan); 2669 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2670 } 2671 2672 // The suggestions are sorted according to their types (easy correction first, then 2673 // misspelled) and to the length of the text that they cover (shorter first). 2674 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2675 return suggestionSpans; 2676 } 2677 2678 @Override 2679 public void show() { 2680 if (!(mTextView.getText() instanceof Editable)) return; 2681 2682 if (updateSuggestions()) { 2683 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2684 mTextView.setCursorVisible(false); 2685 mIsShowingUp = true; 2686 super.show(); 2687 } 2688 } 2689 2690 @Override 2691 protected void measureContent() { 2692 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2693 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2694 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2695 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2696 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2697 2698 int width = 0; 2699 View view = null; 2700 for (int i = 0; i < mNumberOfSuggestions; i++) { 2701 view = mSuggestionsAdapter.getView(i, view, mContentView); 2702 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2703 view.measure(horizontalMeasure, verticalMeasure); 2704 width = Math.max(width, view.getMeasuredWidth()); 2705 } 2706 2707 // Enforce the width based on actual text widths 2708 mContentView.measure( 2709 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2710 verticalMeasure); 2711 2712 Drawable popupBackground = mPopupWindow.getBackground(); 2713 if (popupBackground != null) { 2714 if (mTempRect == null) mTempRect = new Rect(); 2715 popupBackground.getPadding(mTempRect); 2716 width += mTempRect.left + mTempRect.right; 2717 } 2718 mPopupWindow.setWidth(width); 2719 } 2720 2721 @Override 2722 protected int getTextOffset() { 2723 return mTextView.getSelectionStart(); 2724 } 2725 2726 @Override 2727 protected int getVerticalLocalPosition(int line) { 2728 return mTextView.getLayout().getLineBottom(line); 2729 } 2730 2731 @Override 2732 protected int clipVertically(int positionY) { 2733 final int height = mContentView.getMeasuredHeight(); 2734 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2735 return Math.min(positionY, displayMetrics.heightPixels - height); 2736 } 2737 2738 @Override 2739 public void hide() { 2740 super.hide(); 2741 } 2742 2743 private boolean updateSuggestions() { 2744 Spannable spannable = (Spannable) mTextView.getText(); 2745 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2746 2747 final int nbSpans = suggestionSpans.length; 2748 // Suggestions are shown after a delay: the underlying spans may have been removed 2749 if (nbSpans == 0) return false; 2750 2751 mNumberOfSuggestions = 0; 2752 int spanUnionStart = mTextView.getText().length(); 2753 int spanUnionEnd = 0; 2754 2755 SuggestionSpan misspelledSpan = null; 2756 int underlineColor = 0; 2757 2758 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2759 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2760 final int spanStart = spannable.getSpanStart(suggestionSpan); 2761 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2762 spanUnionStart = Math.min(spanStart, spanUnionStart); 2763 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2764 2765 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2766 misspelledSpan = suggestionSpan; 2767 } 2768 2769 // The first span dictates the background color of the highlighted text 2770 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2771 2772 String[] suggestions = suggestionSpan.getSuggestions(); 2773 int nbSuggestions = suggestions.length; 2774 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2775 String suggestion = suggestions[suggestionIndex]; 2776 2777 boolean suggestionIsDuplicate = false; 2778 for (int i = 0; i < mNumberOfSuggestions; i++) { 2779 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2780 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2781 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2782 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2783 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2784 suggestionIsDuplicate = true; 2785 break; 2786 } 2787 } 2788 } 2789 2790 if (!suggestionIsDuplicate) { 2791 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2792 suggestionInfo.suggestionSpan = suggestionSpan; 2793 suggestionInfo.suggestionIndex = suggestionIndex; 2794 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2795 2796 mNumberOfSuggestions++; 2797 2798 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2799 // Also end outer for loop 2800 spanIndex = nbSpans; 2801 break; 2802 } 2803 } 2804 } 2805 } 2806 2807 for (int i = 0; i < mNumberOfSuggestions; i++) { 2808 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2809 } 2810 2811 // Add "Add to dictionary" item if there is a span with the misspelled flag 2812 if (misspelledSpan != null) { 2813 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2814 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2815 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2816 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2817 suggestionInfo.suggestionSpan = misspelledSpan; 2818 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2819 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2820 getContext().getString(com.android.internal.R.string.addToDictionary)); 2821 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2822 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2823 2824 mNumberOfSuggestions++; 2825 } 2826 } 2827 2828 // Delete item 2829 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2830 suggestionInfo.suggestionSpan = null; 2831 suggestionInfo.suggestionIndex = DELETE_TEXT; 2832 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2833 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2834 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2835 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2836 mNumberOfSuggestions++; 2837 2838 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2839 if (underlineColor == 0) { 2840 // Fallback on the default highlight color when the first span does not provide one 2841 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2842 } else { 2843 final float BACKGROUND_TRANSPARENCY = 0.4f; 2844 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2845 mSuggestionRangeSpan.setBackgroundColor( 2846 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2847 } 2848 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2849 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2850 2851 mSuggestionsAdapter.notifyDataSetChanged(); 2852 return true; 2853 } 2854 2855 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2856 int unionEnd) { 2857 final Spannable text = (Spannable) mTextView.getText(); 2858 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2859 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2860 2861 // Adjust the start/end of the suggestion span 2862 suggestionInfo.suggestionStart = spanStart - unionStart; 2863 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2864 + suggestionInfo.text.length(); 2865 2866 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2867 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2868 2869 // Add the text before and after the span. 2870 final String textAsString = text.toString(); 2871 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2872 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2873 } 2874 2875 @Override 2876 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2877 Editable editable = (Editable) mTextView.getText(); 2878 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2879 2880 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2881 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2882 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2883 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2884 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2885 if (spanUnionEnd < editable.length() && 2886 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2887 (spanUnionStart == 0 || 2888 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2889 spanUnionEnd = spanUnionEnd + 1; 2890 } 2891 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2892 } 2893 hide(); 2894 return; 2895 } 2896 2897 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2898 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2899 if (spanStart < 0 || spanEnd <= spanStart) { 2900 // Span has been removed 2901 hide(); 2902 return; 2903 } 2904 2905 final String originalText = editable.toString().substring(spanStart, spanEnd); 2906 2907 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2908 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2909 intent.putExtra("word", originalText); 2910 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2911 // Put a listener to replace the original text with a word which the user 2912 // modified in a user dictionary dialog. 2913 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2914 mTextView.getContext().startActivity(intent); 2915 // There is no way to know if the word was indeed added. Re-check. 2916 // TODO The ExtractEditText should remove the span in the original text instead 2917 editable.removeSpan(suggestionInfo.suggestionSpan); 2918 Selection.setSelection(editable, spanEnd); 2919 updateSpellCheckSpans(spanStart, spanEnd, false); 2920 } else { 2921 // SuggestionSpans are removed by replace: save them before 2922 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2923 SuggestionSpan.class); 2924 final int length = suggestionSpans.length; 2925 int[] suggestionSpansStarts = new int[length]; 2926 int[] suggestionSpansEnds = new int[length]; 2927 int[] suggestionSpansFlags = new int[length]; 2928 for (int i = 0; i < length; i++) { 2929 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2930 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2931 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2932 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2933 2934 // Remove potential misspelled flags 2935 int suggestionSpanFlags = suggestionSpan.getFlags(); 2936 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2937 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2938 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2939 suggestionSpan.setFlags(suggestionSpanFlags); 2940 } 2941 } 2942 2943 final int suggestionStart = suggestionInfo.suggestionStart; 2944 final int suggestionEnd = suggestionInfo.suggestionEnd; 2945 final String suggestion = suggestionInfo.text.subSequence( 2946 suggestionStart, suggestionEnd).toString(); 2947 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2948 2949 // Notify source IME of the suggestion pick. Do this before 2950 // swaping texts. 2951 suggestionInfo.suggestionSpan.notifySelection( 2952 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 2953 2954 // Swap text content between actual text and Suggestion span 2955 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 2956 suggestions[suggestionInfo.suggestionIndex] = originalText; 2957 2958 // Restore previous SuggestionSpans 2959 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 2960 for (int i = 0; i < length; i++) { 2961 // Only spans that include the modified region make sense after replacement 2962 // Spans partially included in the replaced region are removed, there is no 2963 // way to assign them a valid range after replacement 2964 if (suggestionSpansStarts[i] <= spanStart && 2965 suggestionSpansEnds[i] >= spanEnd) { 2966 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2967 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 2968 } 2969 } 2970 2971 // Move cursor at the end of the replaced word 2972 final int newCursorPosition = spanEnd + lengthDifference; 2973 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2974 } 2975 2976 hide(); 2977 } 2978 } 2979 2980 /** 2981 * An ActionMode Callback class that is used to provide actions while in text selection mode. 2982 * 2983 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 2984 * on which of these this TextView supports. 2985 */ 2986 private class SelectionActionModeCallback extends ActionMode.Callback2 { 2987 private final Path mSelectionPath = new Path(); 2988 private final RectF mSelectionBounds = new RectF(); 2989 2990 private int mSelectionHandleHeight; 2991 private int mInsertionHandleHeight; 2992 2993 public SelectionActionModeCallback() { 2994 SelectionModifierCursorController selectionController = getSelectionController(); 2995 if (selectionController.mStartHandle == null) { 2996 // As these are for initializing selectionController, hide() must be called. 2997 selectionController.initDrawables(); 2998 selectionController.initHandles(); 2999 selectionController.hide(); 3000 } 3001 mSelectionHandleHeight = Math.max( 3002 mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight()); 3003 InsertionPointCursorController insertionController = getInsertionController(); 3004 if (insertionController != null) { 3005 insertionController.getHandle(); 3006 mInsertionHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3007 } 3008 } 3009 3010 @Override 3011 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3012 mode.setTitle(mTextView.getContext().getString( 3013 com.android.internal.R.string.textSelectionCABTitle)); 3014 mode.setSubtitle(null); 3015 mode.setTitleOptionalHint(true); 3016 populateMenuWithItems(menu); 3017 3018 if (mCustomSelectionActionModeCallback != null) { 3019 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 3020 // The custom mode can choose to cancel the action mode 3021 return false; 3022 } 3023 } 3024 3025 addIntentMenuItemsForTextProcessing(menu); 3026 3027 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3028 mTextView.setHasTransientState(true); 3029 return true; 3030 } else { 3031 return false; 3032 } 3033 } 3034 3035 private void populateMenuWithItems(Menu menu) { 3036 if (mTextView.canCut()) { 3037 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 3038 setAlphabeticShortcut('x'). 3039 setShowAsAction( 3040 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3041 } 3042 3043 if (mTextView.canCopy()) { 3044 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 3045 setAlphabeticShortcut('c'). 3046 setShowAsAction( 3047 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3048 } 3049 3050 if (mTextView.canPaste()) { 3051 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 3052 setAlphabeticShortcut('v'). 3053 setShowAsAction( 3054 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3055 } 3056 3057 if (mTextView.canShare()) { 3058 menu.add(0, TextView.ID_SHARE, 0, com.android.internal.R.string.share). 3059 setShowAsAction( 3060 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3061 } 3062 3063 if (mTextView.canSelectAllText()) { 3064 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 3065 setAlphabeticShortcut('a'). 3066 setShowAsAction( 3067 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3068 } 3069 3070 updateReplaceItem(menu); 3071 } 3072 3073 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3074 if (mTextView.canProcessText()) { 3075 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3076 List<ResolveInfo> supportedActivities = 3077 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3078 for (ResolveInfo info : supportedActivities) { 3079 menu.add(info.loadLabel(packageManager)) 3080 .setIntent(createProcessTextIntentForResolveInfo(info)) 3081 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM 3082 | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3083 } 3084 } 3085 } 3086 3087 private Intent createProcessTextIntent() { 3088 return new Intent() 3089 .setAction(Intent.ACTION_PROCESS_TEXT) 3090 .setType("text/plain"); 3091 } 3092 3093 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3094 return createProcessTextIntent() 3095 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3096 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3097 } 3098 3099 @Override 3100 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3101 updateReplaceItem(menu); 3102 3103 if (mCustomSelectionActionModeCallback != null) { 3104 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3105 } 3106 return true; 3107 } 3108 3109 private void updateReplaceItem(Menu menu) { 3110 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3111 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3112 if (canReplace && !replaceItemExists) { 3113 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 3114 setShowAsAction( 3115 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3116 } else if (!canReplace && replaceItemExists) { 3117 menu.removeItem(TextView.ID_REPLACE); 3118 } 3119 } 3120 3121 @Override 3122 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3123 if (item.getIntent() != null 3124 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3125 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3126 mPreserveDetachedSelection = true; 3127 mTextView.startActivityForResult( 3128 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3129 return true; 3130 } 3131 if (mCustomSelectionActionModeCallback != null && 3132 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3133 return true; 3134 } 3135 if (item.getItemId() == TextView.ID_REPLACE) { 3136 onReplace(); 3137 return true; 3138 } 3139 return mTextView.onTextContextMenuItem(item.getItemId()); 3140 } 3141 3142 @Override 3143 public void onDestroyActionMode(ActionMode mode) { 3144 if (mCustomSelectionActionModeCallback != null) { 3145 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3146 } 3147 3148 /* 3149 * If we're ending this mode because we're detaching from a window, 3150 * we still have selection state to preserve. Don't clear it, we'll 3151 * bring back the selection mode when (if) we get reattached. 3152 */ 3153 if (!mPreserveDetachedSelection) { 3154 Selection.setSelection((Spannable) mTextView.getText(), 3155 mTextView.getSelectionEnd()); 3156 mTextView.setHasTransientState(false); 3157 } 3158 3159 if (mSelectionModifierCursorController != null) { 3160 mSelectionModifierCursorController.hide(); 3161 } 3162 3163 mSelectionActionMode = null; 3164 } 3165 3166 @Override 3167 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3168 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3169 super.onGetContentRect(mode, view, outRect); 3170 return; 3171 } 3172 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3173 // We have a selection. 3174 mSelectionPath.reset(); 3175 mTextView.getLayout().getSelectionPath( 3176 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3177 mSelectionPath.computeBounds(mSelectionBounds, true); 3178 mSelectionBounds.bottom += mSelectionHandleHeight; 3179 } else if (mCursorCount == 2) { 3180 // We have a split cursor. In this case, we take the rectangle that includes both 3181 // parts of the cursor to ensure we don't obscure either of them. 3182 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3183 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3184 mSelectionBounds.set( 3185 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3186 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3187 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3188 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3189 + mInsertionHandleHeight); 3190 } else { 3191 // We have a single cursor. 3192 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3193 float primaryHorizontal = 3194 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3195 mSelectionBounds.set( 3196 primaryHorizontal, 3197 mTextView.getLayout().getLineTop(line), 3198 primaryHorizontal + 1, 3199 mTextView.getLayout().getLineTop(line + 1) + mInsertionHandleHeight); 3200 } 3201 // Take TextView's padding and scroll into account. 3202 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3203 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3204 outRect.set( 3205 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3206 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3207 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3208 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3209 } 3210 } 3211 3212 private void onReplace() { 3213 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3214 stopSelectionActionMode(); 3215 Selection.setSelection((Spannable) mTextView.getText(), middle); 3216 showSuggestions(); 3217 } 3218 3219 /** 3220 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3221 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3222 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3223 */ 3224 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3225 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3226 final int[] mTmpIntOffset = new int[2]; 3227 final Matrix mViewToScreenMatrix = new Matrix(); 3228 3229 @Override 3230 public void updatePosition(int parentPositionX, int parentPositionY, 3231 boolean parentPositionChanged, boolean parentScrolled) { 3232 final InputMethodState ims = mInputMethodState; 3233 if (ims == null || ims.mBatchEditNesting > 0) { 3234 return; 3235 } 3236 final InputMethodManager imm = InputMethodManager.peekInstance(); 3237 if (null == imm) { 3238 return; 3239 } 3240 if (!imm.isActive(mTextView)) { 3241 return; 3242 } 3243 // Skip if the IME has not requested the cursor/anchor position. 3244 if (!imm.isCursorAnchorInfoEnabled()) { 3245 return; 3246 } 3247 Layout layout = mTextView.getLayout(); 3248 if (layout == null) { 3249 return; 3250 } 3251 3252 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3253 builder.reset(); 3254 3255 final int selectionStart = mTextView.getSelectionStart(); 3256 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3257 3258 // Construct transformation matrix from view local coordinates to screen coordinates. 3259 mViewToScreenMatrix.set(mTextView.getMatrix()); 3260 mTextView.getLocationOnScreen(mTmpIntOffset); 3261 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3262 builder.setMatrix(mViewToScreenMatrix); 3263 3264 final float viewportToContentHorizontalOffset = 3265 mTextView.viewportToContentHorizontalOffset(); 3266 final float viewportToContentVerticalOffset = 3267 mTextView.viewportToContentVerticalOffset(); 3268 3269 final CharSequence text = mTextView.getText(); 3270 if (text instanceof Spannable) { 3271 final Spannable sp = (Spannable) text; 3272 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3273 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3274 if (composingTextEnd < composingTextStart) { 3275 final int temp = composingTextEnd; 3276 composingTextEnd = composingTextStart; 3277 composingTextStart = temp; 3278 } 3279 final boolean hasComposingText = 3280 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3281 if (hasComposingText) { 3282 final CharSequence composingText = text.subSequence(composingTextStart, 3283 composingTextEnd); 3284 builder.setComposingText(composingTextStart, composingText); 3285 3286 final int minLine = layout.getLineForOffset(composingTextStart); 3287 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3288 for (int line = minLine; line <= maxLine; ++line) { 3289 final int lineStart = layout.getLineStart(line); 3290 final int lineEnd = layout.getLineEnd(line); 3291 final int offsetStart = Math.max(lineStart, composingTextStart); 3292 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3293 final boolean ltrLine = 3294 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3295 final float[] widths = new float[offsetEnd - offsetStart]; 3296 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3297 final float top = layout.getLineTop(line); 3298 final float bottom = layout.getLineBottom(line); 3299 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3300 final float charWidth = widths[offset - offsetStart]; 3301 final boolean isRtl = layout.isRtlCharAt(offset); 3302 final float primary = layout.getPrimaryHorizontal(offset); 3303 final float secondary = layout.getSecondaryHorizontal(offset); 3304 // TODO: This doesn't work perfectly for text with custom styles and 3305 // TAB chars. 3306 final float left; 3307 final float right; 3308 if (ltrLine) { 3309 if (isRtl) { 3310 left = secondary - charWidth; 3311 right = secondary; 3312 } else { 3313 left = primary; 3314 right = primary + charWidth; 3315 } 3316 } else { 3317 if (!isRtl) { 3318 left = secondary; 3319 right = secondary + charWidth; 3320 } else { 3321 left = primary - charWidth; 3322 right = primary; 3323 } 3324 } 3325 // TODO: Check top-right and bottom-left as well. 3326 final float localLeft = left + viewportToContentHorizontalOffset; 3327 final float localRight = right + viewportToContentHorizontalOffset; 3328 final float localTop = top + viewportToContentVerticalOffset; 3329 final float localBottom = bottom + viewportToContentVerticalOffset; 3330 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3331 final boolean isBottomRightVisible = 3332 isPositionVisible(localRight, localBottom); 3333 int characterBoundsFlags = 0; 3334 if (isTopLeftVisible || isBottomRightVisible) { 3335 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3336 } 3337 if (!isTopLeftVisible || !isBottomRightVisible) { 3338 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3339 } 3340 if (isRtl) { 3341 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3342 } 3343 // Here offset is the index in Java chars. 3344 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3345 localBottom, characterBoundsFlags); 3346 } 3347 } 3348 } 3349 } 3350 3351 // Treat selectionStart as the insertion point. 3352 if (0 <= selectionStart) { 3353 final int offset = selectionStart; 3354 final int line = layout.getLineForOffset(offset); 3355 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3356 + viewportToContentHorizontalOffset; 3357 final float insertionMarkerTop = layout.getLineTop(line) 3358 + viewportToContentVerticalOffset; 3359 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3360 + viewportToContentVerticalOffset; 3361 final float insertionMarkerBottom = layout.getLineBottom(line) 3362 + viewportToContentVerticalOffset; 3363 final boolean isTopVisible = 3364 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3365 final boolean isBottomVisible = 3366 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3367 int insertionMarkerFlags = 0; 3368 if (isTopVisible || isBottomVisible) { 3369 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3370 } 3371 if (!isTopVisible || !isBottomVisible) { 3372 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3373 } 3374 if (layout.isRtlCharAt(offset)) { 3375 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3376 } 3377 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3378 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3379 } 3380 3381 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3382 } 3383 } 3384 3385 private abstract class HandleView extends View implements TextViewPositionListener { 3386 protected Drawable mDrawable; 3387 protected Drawable mDrawableLtr; 3388 protected Drawable mDrawableRtl; 3389 private final PopupWindow mContainer; 3390 // Position with respect to the parent TextView 3391 private int mPositionX, mPositionY; 3392 private boolean mIsDragging; 3393 // Offset from touch position to mPosition 3394 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3395 protected int mHotspotX; 3396 protected int mHorizontalGravity; 3397 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3398 private float mTouchOffsetY; 3399 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3400 private float mIdealVerticalOffset; 3401 // Parent's (TextView) previous position in window 3402 private int mLastParentX, mLastParentY; 3403 // Previous text character offset 3404 protected int mPreviousOffset = -1; 3405 // Previous text character offset 3406 private boolean mPositionHasChanged = true; 3407 // Minimum touch target size for handles 3408 private int mMinSize; 3409 // Indicates the line of text that the handle is on. 3410 protected int mPrevLine = -1; 3411 3412 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3413 super(mTextView.getContext()); 3414 mContainer = new PopupWindow(mTextView.getContext(), null, 3415 com.android.internal.R.attr.textSelectHandleWindowStyle); 3416 mContainer.setSplitTouchEnabled(true); 3417 mContainer.setClippingEnabled(false); 3418 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3419 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3420 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3421 mContainer.setContentView(this); 3422 3423 mDrawableLtr = drawableLtr; 3424 mDrawableRtl = drawableRtl; 3425 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3426 com.android.internal.R.dimen.text_handle_min_size); 3427 3428 updateDrawable(); 3429 3430 final int handleHeight = getPreferredHeight(); 3431 mTouchOffsetY = -0.3f * handleHeight; 3432 mIdealVerticalOffset = 0.7f * handleHeight; 3433 } 3434 3435 protected void updateDrawable() { 3436 final int offset = getCurrentCursorOffset(); 3437 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3438 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3439 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3440 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3441 } 3442 3443 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3444 protected abstract int getHorizontalGravity(boolean isRtlRun); 3445 3446 // Touch-up filter: number of previous positions remembered 3447 private static final int HISTORY_SIZE = 5; 3448 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3449 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3450 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3451 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3452 private int mPreviousOffsetIndex = 0; 3453 private int mNumberPreviousOffsets = 0; 3454 3455 private void startTouchUpFilter(int offset) { 3456 mNumberPreviousOffsets = 0; 3457 addPositionToTouchUpFilter(offset); 3458 } 3459 3460 private void addPositionToTouchUpFilter(int offset) { 3461 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3462 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3463 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3464 mNumberPreviousOffsets++; 3465 } 3466 3467 private void filterOnTouchUp() { 3468 final long now = SystemClock.uptimeMillis(); 3469 int i = 0; 3470 int index = mPreviousOffsetIndex; 3471 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3472 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3473 i++; 3474 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3475 } 3476 3477 if (i > 0 && i < iMax && 3478 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3479 positionAtCursorOffset(mPreviousOffsets[index], false); 3480 } 3481 } 3482 3483 public boolean offsetHasBeenChanged() { 3484 return mNumberPreviousOffsets > 1; 3485 } 3486 3487 @Override 3488 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3489 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3490 } 3491 3492 private int getPreferredWidth() { 3493 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3494 } 3495 3496 private int getPreferredHeight() { 3497 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3498 } 3499 3500 public void show() { 3501 if (isShowing()) return; 3502 3503 getPositionListener().addSubscriber(this, true /* local position may change */); 3504 3505 // Make sure the offset is always considered new, even when focusing at same position 3506 mPreviousOffset = -1; 3507 positionAtCursorOffset(getCurrentCursorOffset(), false); 3508 } 3509 3510 protected void dismiss() { 3511 mIsDragging = false; 3512 mContainer.dismiss(); 3513 onDetached(); 3514 } 3515 3516 public void hide() { 3517 dismiss(); 3518 3519 getPositionListener().removeSubscriber(this); 3520 } 3521 3522 public boolean isShowing() { 3523 return mContainer.isShowing(); 3524 } 3525 3526 private boolean isVisible() { 3527 // Always show a dragging handle. 3528 if (mIsDragging) { 3529 return true; 3530 } 3531 3532 if (mTextView.isInBatchEditMode()) { 3533 return false; 3534 } 3535 3536 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3537 } 3538 3539 public abstract int getCurrentCursorOffset(); 3540 3541 protected abstract void updateSelection(int offset); 3542 3543 public abstract void updatePosition(float x, float y); 3544 3545 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3546 // A HandleView relies on the layout, which may be nulled by external methods 3547 Layout layout = mTextView.getLayout(); 3548 if (layout == null) { 3549 // Will update controllers' state, hiding them and stopping selection mode if needed 3550 prepareCursorControllers(); 3551 return; 3552 } 3553 3554 boolean offsetChanged = offset != mPreviousOffset; 3555 if (offsetChanged || parentScrolled) { 3556 if (offsetChanged) { 3557 updateSelection(offset); 3558 addPositionToTouchUpFilter(offset); 3559 } 3560 final int line = layout.getLineForOffset(offset); 3561 mPrevLine = line; 3562 3563 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3564 getHorizontalOffset() + getCursorOffset()); 3565 mPositionY = layout.getLineBottom(line); 3566 3567 // Take TextView's padding and scroll into account. 3568 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3569 mPositionY += mTextView.viewportToContentVerticalOffset(); 3570 3571 mPreviousOffset = offset; 3572 mPositionHasChanged = true; 3573 } 3574 } 3575 3576 public void updatePosition(int parentPositionX, int parentPositionY, 3577 boolean parentPositionChanged, boolean parentScrolled) { 3578 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3579 if (parentPositionChanged || mPositionHasChanged) { 3580 if (mIsDragging) { 3581 // Update touchToWindow offset in case of parent scrolling while dragging 3582 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3583 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3584 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3585 mLastParentX = parentPositionX; 3586 mLastParentY = parentPositionY; 3587 } 3588 3589 onHandleMoved(); 3590 } 3591 3592 if (isVisible()) { 3593 final int positionX = parentPositionX + mPositionX; 3594 final int positionY = parentPositionY + mPositionY; 3595 if (isShowing()) { 3596 mContainer.update(positionX, positionY, -1, -1); 3597 } else { 3598 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3599 positionX, positionY); 3600 } 3601 } else { 3602 if (isShowing()) { 3603 dismiss(); 3604 } 3605 } 3606 3607 mPositionHasChanged = false; 3608 } 3609 } 3610 3611 public void showAtLocation(int offset) { 3612 // TODO - investigate if there's a better way to show the handles 3613 // after the drag accelerator has occured. 3614 int[] tmpCords = new int[2]; 3615 mTextView.getLocationInWindow(tmpCords); 3616 3617 Layout layout = mTextView.getLayout(); 3618 int posX = tmpCords[0]; 3619 int posY = tmpCords[1]; 3620 3621 final int line = layout.getLineForOffset(offset); 3622 3623 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3624 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3625 int startY = layout.getLineBottom(line); 3626 3627 // Take TextView's padding and scroll into account. 3628 startX += mTextView.viewportToContentHorizontalOffset(); 3629 startY += mTextView.viewportToContentVerticalOffset(); 3630 3631 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3632 startX + posX, startY + posY); 3633 } 3634 3635 @Override 3636 protected void onDraw(Canvas c) { 3637 final int drawWidth = mDrawable.getIntrinsicWidth(); 3638 final int left = getHorizontalOffset(); 3639 3640 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3641 mDrawable.draw(c); 3642 } 3643 3644 private int getHorizontalOffset() { 3645 final int width = getPreferredWidth(); 3646 final int drawWidth = mDrawable.getIntrinsicWidth(); 3647 final int left; 3648 switch (mHorizontalGravity) { 3649 case Gravity.LEFT: 3650 left = 0; 3651 break; 3652 default: 3653 case Gravity.CENTER: 3654 left = (width - drawWidth) / 2; 3655 break; 3656 case Gravity.RIGHT: 3657 left = width - drawWidth; 3658 break; 3659 } 3660 return left; 3661 } 3662 3663 protected int getCursorOffset() { 3664 return 0; 3665 } 3666 3667 @Override 3668 public boolean onTouchEvent(MotionEvent ev) { 3669 switch (ev.getActionMasked()) { 3670 case MotionEvent.ACTION_DOWN: { 3671 startTouchUpFilter(getCurrentCursorOffset()); 3672 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3673 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3674 3675 final PositionListener positionListener = getPositionListener(); 3676 mLastParentX = positionListener.getPositionX(); 3677 mLastParentY = positionListener.getPositionY(); 3678 mIsDragging = true; 3679 break; 3680 } 3681 3682 case MotionEvent.ACTION_MOVE: { 3683 final float rawX = ev.getRawX(); 3684 final float rawY = ev.getRawY(); 3685 3686 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3687 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3688 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3689 float newVerticalOffset; 3690 if (previousVerticalOffset < mIdealVerticalOffset) { 3691 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3692 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3693 } else { 3694 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3695 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3696 } 3697 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3698 3699 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3700 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3701 3702 updatePosition(newPosX, newPosY); 3703 break; 3704 } 3705 3706 case MotionEvent.ACTION_UP: 3707 filterOnTouchUp(); 3708 mIsDragging = false; 3709 break; 3710 3711 case MotionEvent.ACTION_CANCEL: 3712 mIsDragging = false; 3713 break; 3714 } 3715 return true; 3716 } 3717 3718 public boolean isDragging() { 3719 return mIsDragging; 3720 } 3721 3722 void onHandleMoved() {} 3723 3724 public void onDetached() {} 3725 } 3726 3727 private class InsertionHandleView extends HandleView { 3728 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3729 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3730 3731 // Used to detect taps on the insertion handle, which will affect the selection action mode 3732 private float mDownPositionX, mDownPositionY; 3733 private Runnable mHider; 3734 3735 public InsertionHandleView(Drawable drawable) { 3736 super(drawable, drawable); 3737 } 3738 3739 @Override 3740 public void show() { 3741 super.show(); 3742 3743 final long durationSinceCutOrCopy = 3744 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3745 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3746 startSelectionActionModeWithoutSelection(); 3747 } 3748 3749 hideAfterDelay(); 3750 } 3751 3752 private void hideAfterDelay() { 3753 if (mHider == null) { 3754 mHider = new Runnable() { 3755 public void run() { 3756 hide(); 3757 } 3758 }; 3759 } else { 3760 removeHiderCallback(); 3761 } 3762 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3763 } 3764 3765 private void removeHiderCallback() { 3766 if (mHider != null) { 3767 mTextView.removeCallbacks(mHider); 3768 } 3769 } 3770 3771 @Override 3772 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3773 return drawable.getIntrinsicWidth() / 2; 3774 } 3775 3776 @Override 3777 protected int getHorizontalGravity(boolean isRtlRun) { 3778 return Gravity.CENTER_HORIZONTAL; 3779 } 3780 3781 @Override 3782 protected int getCursorOffset() { 3783 int offset = super.getCursorOffset(); 3784 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3785 if (cursor != null) { 3786 cursor.getPadding(mTempRect); 3787 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3788 } 3789 return offset; 3790 } 3791 3792 @Override 3793 public boolean onTouchEvent(MotionEvent ev) { 3794 final boolean result = super.onTouchEvent(ev); 3795 3796 switch (ev.getActionMasked()) { 3797 case MotionEvent.ACTION_DOWN: 3798 mDownPositionX = ev.getRawX(); 3799 mDownPositionY = ev.getRawY(); 3800 break; 3801 3802 case MotionEvent.ACTION_UP: 3803 if (!offsetHasBeenChanged()) { 3804 final float deltaX = mDownPositionX - ev.getRawX(); 3805 final float deltaY = mDownPositionY - ev.getRawY(); 3806 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3807 3808 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3809 mTextView.getContext()); 3810 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3811 3812 if (distanceSquared < touchSlop * touchSlop) { 3813 // Tapping on the handle toggles the selection action mode. 3814 if (mSelectionActionMode != null) { 3815 mSelectionActionMode.finish(); 3816 } else { 3817 startSelectionActionModeWithoutSelection(); 3818 } 3819 } 3820 } 3821 hideAfterDelay(); 3822 break; 3823 3824 case MotionEvent.ACTION_CANCEL: 3825 hideAfterDelay(); 3826 break; 3827 3828 default: 3829 break; 3830 } 3831 3832 return result; 3833 } 3834 3835 @Override 3836 public int getCurrentCursorOffset() { 3837 return mTextView.getSelectionStart(); 3838 } 3839 3840 @Override 3841 public void updateSelection(int offset) { 3842 Selection.setSelection((Spannable) mTextView.getText(), offset); 3843 } 3844 3845 @Override 3846 public void updatePosition(float x, float y) { 3847 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3848 } 3849 3850 @Override 3851 void onHandleMoved() { 3852 super.onHandleMoved(); 3853 removeHiderCallback(); 3854 } 3855 3856 @Override 3857 public void onDetached() { 3858 super.onDetached(); 3859 removeHiderCallback(); 3860 } 3861 } 3862 3863 private class SelectionStartHandleView extends HandleView { 3864 // Indicates whether the cursor is making adjustments within a word. 3865 private boolean mInWord = false; 3866 // Offset to track difference between touch and word boundary. 3867 protected int mTouchWordOffset; 3868 3869 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3870 super(drawableLtr, drawableRtl); 3871 } 3872 3873 @Override 3874 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3875 return isRtlRun ? 0 : drawable.getIntrinsicWidth(); 3876 } 3877 3878 @Override 3879 protected int getHorizontalGravity(boolean isRtlRun) { 3880 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 3881 } 3882 3883 @Override 3884 public int getCurrentCursorOffset() { 3885 return mTextView.getSelectionStart(); 3886 } 3887 3888 @Override 3889 public void updateSelection(int offset) { 3890 Selection.setSelection((Spannable) mTextView.getText(), offset, 3891 mTextView.getSelectionEnd()); 3892 updateDrawable(); 3893 if (mSelectionActionMode != null) { 3894 mSelectionActionMode.invalidate(); 3895 } 3896 } 3897 3898 @Override 3899 public void updatePosition(float x, float y) { 3900 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3901 final int currLine = mTextView.getLineAtCoordinate(y); 3902 3903 // Don't select white space on different lines. 3904 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 3905 3906 boolean positionCursor = false; 3907 int offset = trueOffset; 3908 int end = getWordEnd(offset, true); 3909 int start = getWordStart(offset); 3910 3911 if (offset < mPreviousOffset) { 3912 // User is increasing the selection. 3913 if (!mInWord || currLine < mPrevLine) { 3914 // We're not in a word, or we're on a different line so we'll expand by 3915 // word. First ensure the user has at least entered the next word. 3916 int offsetToWord = Math.min((end - start) / 2, 2); 3917 if (offset <= end - offsetToWord || currLine < mPrevLine) { 3918 offset = start; 3919 } else { 3920 offset = mPreviousOffset; 3921 } 3922 } 3923 mTouchWordOffset = Math.max(trueOffset - offset, 0); 3924 mInWord = !isStartBoundary(offset); 3925 positionCursor = true; 3926 } else if (offset - mTouchWordOffset > mPreviousOffset) { 3927 // User is shrinking the selection. 3928 if (currLine > mPrevLine) { 3929 // We're on a different line, so we'll snap to word boundaries. 3930 offset = end; 3931 } 3932 offset -= mTouchWordOffset; 3933 mInWord = !isEndBoundary(offset); 3934 positionCursor = true; 3935 } 3936 3937 // Handles can not cross and selection is at least one character. 3938 if (positionCursor) { 3939 final int selectionEnd = mTextView.getSelectionEnd(); 3940 if (offset >= selectionEnd) { 3941 // We can't cross the handles so let's just constrain the Y value. 3942 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 3943 if (alteredOffset >= selectionEnd) { 3944 // Can't pass the other drag handle. 3945 offset = Math.max(0, selectionEnd - 1); 3946 } else { 3947 offset = alteredOffset; 3948 } 3949 } 3950 positionAtCursorOffset(offset, false); 3951 } 3952 } 3953 3954 @Override 3955 public boolean onTouchEvent(MotionEvent event) { 3956 boolean superResult = super.onTouchEvent(event); 3957 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 3958 // Reset the touch word offset when the user has lifted their finger. 3959 mTouchWordOffset = 0; 3960 } 3961 return superResult; 3962 } 3963 } 3964 3965 private class SelectionEndHandleView extends HandleView { 3966 // Indicates whether the cursor is making adjustments within a word. 3967 private boolean mInWord = false; 3968 // Offset to track difference between touch and word boundary. 3969 protected int mTouchWordOffset; 3970 3971 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3972 super(drawableLtr, drawableRtl); 3973 } 3974 3975 @Override 3976 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3977 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 3978 } 3979 3980 @Override 3981 protected int getHorizontalGravity(boolean isRtlRun) { 3982 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 3983 } 3984 3985 @Override 3986 public int getCurrentCursorOffset() { 3987 return mTextView.getSelectionEnd(); 3988 } 3989 3990 @Override 3991 public void updateSelection(int offset) { 3992 Selection.setSelection((Spannable) mTextView.getText(), 3993 mTextView.getSelectionStart(), offset); 3994 if (mSelectionActionMode != null) { 3995 mSelectionActionMode.invalidate(); 3996 } 3997 updateDrawable(); 3998 } 3999 4000 @Override 4001 public void updatePosition(float x, float y) { 4002 final int trueOffset = mTextView.getOffsetForPosition(x, y); 4003 final int currLine = mTextView.getLineAtCoordinate(y); 4004 4005 // Don't select white space on different lines. 4006 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 4007 4008 int offset = trueOffset; 4009 boolean positionCursor = false; 4010 4011 int end = getWordEnd(offset, true); 4012 int start = getWordStart(offset); 4013 4014 if (offset > mPreviousOffset) { 4015 // User is increasing the selection. 4016 if (!mInWord || currLine > mPrevLine) { 4017 // We're not in a word, or we're on a different line so we'll expand by 4018 // word. First ensure the user has at least entered the next word. 4019 int midPoint = Math.min((end - start) / 2, 2); 4020 if (offset >= start + midPoint || currLine > mPrevLine) { 4021 offset = end; 4022 } else { 4023 offset = mPreviousOffset; 4024 } 4025 } 4026 mTouchWordOffset = Math.max(offset - trueOffset, 0); 4027 mInWord = !isEndBoundary(offset); 4028 positionCursor = true; 4029 } else if (offset + mTouchWordOffset < mPreviousOffset) { 4030 // User is shrinking the selection. 4031 if (currLine < mPrevLine) { 4032 // We're on a different line, so we'll snap to word boundaries. 4033 offset = start; 4034 } 4035 offset += mTouchWordOffset; 4036 positionCursor = true; 4037 mInWord = !isStartBoundary(offset); 4038 } 4039 4040 if (positionCursor) { 4041 final int selectionStart = mTextView.getSelectionStart(); 4042 if (offset <= selectionStart) { 4043 // We can't cross the handles so let's just constrain the Y value. 4044 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 4045 int length = mTextView.getText().length(); 4046 if (alteredOffset <= selectionStart) { 4047 // Can't pass the other drag handle. 4048 offset = Math.min(selectionStart + 1, length); 4049 } else { 4050 offset = Math.min(alteredOffset, length); 4051 } 4052 } 4053 positionAtCursorOffset(offset, false); 4054 } 4055 } 4056 4057 @Override 4058 public boolean onTouchEvent(MotionEvent event) { 4059 boolean superResult = super.onTouchEvent(event); 4060 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4061 // Reset the touch word offset when the user has lifted their finger. 4062 mTouchWordOffset = 0; 4063 } 4064 return superResult; 4065 } 4066 } 4067 4068 /** 4069 * Checks whether selection is happening on a different line than previous and 4070 * if that line only contains whitespace up to the touch location. 4071 * 4072 * @param prevLine The previous line the selection was on. 4073 * @param currLine The current line being selected. 4074 * @param offset The offset in the text where the touch occurred. 4075 * @return Whether or not it was just a white space line being selected. 4076 */ 4077 private boolean isWhitespaceLine(int prevLine, int currLine, int offset) { 4078 if (prevLine == currLine) { 4079 // Same line; don't care. 4080 return false; 4081 } 4082 CharSequence text = mTextView.getText(); 4083 if (offset == text.length()) { 4084 // No character at the last position. 4085 return false; 4086 } 4087 int lineEndOffset = mTextView.getLayout().getLineEnd(currLine); 4088 for (int cp, i = offset; i < lineEndOffset; i += Character.charCount(cp)) { 4089 cp = Character.codePointAt(text, i); 4090 if (!Character.isSpaceChar(cp) && !Character.isWhitespace(cp)) { 4091 // There are non white space chars on the line. 4092 return false; 4093 } 4094 } 4095 return true; 4096 } 4097 4098 /** 4099 * A CursorController instance can be used to control a cursor in the text. 4100 */ 4101 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4102 /** 4103 * Makes the cursor controller visible on screen. 4104 * See also {@link #hide()}. 4105 */ 4106 public void show(); 4107 4108 /** 4109 * Hide the cursor controller from screen. 4110 * See also {@link #show()}. 4111 */ 4112 public void hide(); 4113 4114 /** 4115 * Called when the view is detached from window. Perform house keeping task, such as 4116 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4117 * preventing the activity from being recycled. 4118 */ 4119 public void onDetached(); 4120 } 4121 4122 private class InsertionPointCursorController implements CursorController { 4123 private InsertionHandleView mHandle; 4124 4125 public void show() { 4126 getHandle().show(); 4127 } 4128 4129 public void hide() { 4130 if (mHandle != null) { 4131 mHandle.hide(); 4132 } 4133 } 4134 4135 public void onTouchModeChanged(boolean isInTouchMode) { 4136 if (!isInTouchMode) { 4137 hide(); 4138 } 4139 } 4140 4141 private InsertionHandleView getHandle() { 4142 if (mSelectHandleCenter == null) { 4143 mSelectHandleCenter = mTextView.getContext().getDrawable( 4144 mTextView.mTextSelectHandleRes); 4145 } 4146 if (mHandle == null) { 4147 mHandle = new InsertionHandleView(mSelectHandleCenter); 4148 } 4149 return mHandle; 4150 } 4151 4152 @Override 4153 public void onDetached() { 4154 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4155 observer.removeOnTouchModeChangeListener(this); 4156 4157 if (mHandle != null) mHandle.onDetached(); 4158 } 4159 } 4160 4161 class SelectionModifierCursorController implements CursorController { 4162 // The cursor controller handles, lazily created when shown. 4163 private SelectionStartHandleView mStartHandle; 4164 private SelectionEndHandleView mEndHandle; 4165 // The offsets of that last touch down event. Remembered to start selection there. 4166 private int mMinTouchOffset, mMaxTouchOffset; 4167 4168 // Double tap detection 4169 private long mPreviousTapUpTime = 0; 4170 private float mDownPositionX, mDownPositionY; 4171 private boolean mGestureStayedInTapRegion; 4172 4173 // Where the user first starts the drag motion. 4174 private int mStartOffset = -1; 4175 // Indicates whether the user is selecting text and using the drag accelerator. 4176 private boolean mDragAcceleratorActive; 4177 // Indicates the line of text the drag accelerator is on. 4178 private int mPrevLine = -1; 4179 4180 SelectionModifierCursorController() { 4181 resetTouchOffsets(); 4182 } 4183 4184 public void show() { 4185 if (mTextView.isInBatchEditMode()) { 4186 return; 4187 } 4188 initDrawables(); 4189 initHandles(); 4190 hideInsertionPointCursorController(); 4191 } 4192 4193 private void initDrawables() { 4194 if (mSelectHandleLeft == null) { 4195 mSelectHandleLeft = mTextView.getContext().getDrawable( 4196 mTextView.mTextSelectHandleLeftRes); 4197 } 4198 if (mSelectHandleRight == null) { 4199 mSelectHandleRight = mTextView.getContext().getDrawable( 4200 mTextView.mTextSelectHandleRightRes); 4201 } 4202 } 4203 4204 private void initHandles() { 4205 // Lazy object creation has to be done before updatePosition() is called. 4206 if (mStartHandle == null) { 4207 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4208 } 4209 if (mEndHandle == null) { 4210 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4211 } 4212 4213 mStartHandle.show(); 4214 mEndHandle.show(); 4215 4216 hideInsertionPointCursorController(); 4217 } 4218 4219 public void hide() { 4220 if (mStartHandle != null) mStartHandle.hide(); 4221 if (mEndHandle != null) mEndHandle.hide(); 4222 } 4223 4224 public void enterDrag() { 4225 // Just need to init the handles / hide insertion cursor. 4226 show(); 4227 mDragAcceleratorActive = true; 4228 // Start location of selection. 4229 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4230 mLastDownPositionY); 4231 // Don't show the handles until user has lifted finger. 4232 hide(); 4233 4234 // This stops scrolling parents from intercepting the touch event, allowing 4235 // the user to continue dragging across the screen to select text; TextView will 4236 // scroll as necessary. 4237 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4238 } 4239 4240 public void onTouchEvent(MotionEvent event) { 4241 // This is done even when the View does not have focus, so that long presses can start 4242 // selection and tap can move cursor from this tap position. 4243 switch (event.getActionMasked()) { 4244 case MotionEvent.ACTION_DOWN: 4245 final float x = event.getX(); 4246 final float y = event.getY(); 4247 4248 // Remember finger down position, to be able to start selection from there. 4249 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4250 4251 // Double tap detection 4252 if (mGestureStayedInTapRegion) { 4253 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 4254 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 4255 final float deltaX = x - mDownPositionX; 4256 final float deltaY = y - mDownPositionY; 4257 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4258 4259 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4260 mTextView.getContext()); 4261 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4262 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4263 4264 if (stayedInArea && isPositionOnText(x, y)) { 4265 startSelectionActionModeWithSelectionAndStartDrag(); 4266 mDiscardNextActionUp = true; 4267 } 4268 } 4269 } 4270 4271 // New selection, reset line. 4272 mPrevLine = mTextView.getLineAtCoordinate(y); 4273 mDownPositionX = x; 4274 mDownPositionY = y; 4275 mGestureStayedInTapRegion = true; 4276 break; 4277 4278 case MotionEvent.ACTION_POINTER_DOWN: 4279 case MotionEvent.ACTION_POINTER_UP: 4280 // Handle multi-point gestures. Keep min and max offset positions. 4281 // Only activated for devices that correctly handle multi-touch. 4282 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4283 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4284 updateMinAndMaxOffsets(event); 4285 } 4286 break; 4287 4288 case MotionEvent.ACTION_MOVE: 4289 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4290 mTextView.getContext()); 4291 4292 if (mGestureStayedInTapRegion) { 4293 final float deltaX = event.getX() - mDownPositionX; 4294 final float deltaY = event.getY() - mDownPositionY; 4295 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4296 4297 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4298 4299 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4300 mGestureStayedInTapRegion = false; 4301 } 4302 } 4303 4304 if (mStartHandle != null && mStartHandle.isShowing()) { 4305 // Don't do the drag if the handles are showing already. 4306 break; 4307 } 4308 4309 if (mStartOffset != -1) { 4310 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4311 event.getY()); 4312 int offset = rawOffset; 4313 4314 // We don't start "dragging" until the user is past the initial word that 4315 // gets selected on long press. 4316 int firstWordStart = getWordStart(mStartOffset); 4317 int firstWordEnd = getWordEnd(mStartOffset, false); 4318 if (offset > firstWordEnd || offset < firstWordStart) { 4319 4320 // Basically the goal in the below code is to have the highlight be 4321 // offset so that your finger isn't covering the end point. 4322 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4323 float mx = event.getX(); 4324 float my = event.getY(); 4325 if (mx > fingerOffset) mx -= fingerOffset; 4326 if (my > fingerOffset) my -= fingerOffset; 4327 offset = mTextView.getOffsetForPosition(mx, my); 4328 4329 int currLine = mTextView.getLineAtCoordinate(my); 4330 4331 // Don't select white space on different lines. 4332 if (isWhitespaceLine(mPrevLine, currLine, offset)) return; 4333 4334 mPrevLine = currLine; 4335 4336 // Perform the check for closeness at edge of view, if we're very close 4337 // don't adjust the offset to be in front of the finger - otherwise the 4338 // user can't select words at the edge. 4339 if (mTextView.getWidth() - fingerOffset > mx) { 4340 // We're going by word, so we need to make sure that the offset 4341 // that we get is within this, so we'll get the previous boundary. 4342 final WordIterator wordIterator = getWordIteratorWithText(); 4343 4344 final int precedingOffset = wordIterator.preceding(offset); 4345 if (mStartOffset < offset) { 4346 // Expanding with bottom handle, in this case the selection end 4347 // is before the finger. 4348 offset = Math.max(precedingOffset - 1, 0); 4349 } else { 4350 // Expand with the start handle, in this case the selection 4351 // start is before the finger. 4352 if (precedingOffset == WordIterator.DONE) { 4353 offset = 0; 4354 } else { 4355 offset = wordIterator.preceding(precedingOffset); 4356 } 4357 } 4358 } 4359 if (offset == WordIterator.DONE) 4360 offset = rawOffset; 4361 4362 // Need to adjust start offset based on direction of movement. 4363 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4364 : getWordEnd(mStartOffset, true); 4365 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4366 offset); 4367 } 4368 } 4369 break; 4370 4371 case MotionEvent.ACTION_UP: 4372 mPreviousTapUpTime = SystemClock.uptimeMillis(); 4373 if (mDragAcceleratorActive) { 4374 // No longer dragging to select text, let the parent intercept events. 4375 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4376 4377 show(); 4378 int startOffset = mTextView.getSelectionStart(); 4379 int endOffset = mTextView.getSelectionEnd(); 4380 4381 // Since we don't let drag handles pass once they're visible, we need to 4382 // make sure the start / end locations are correct because the user *can* 4383 // switch directions during the initial drag. 4384 if (endOffset < startOffset) { 4385 int tmp = endOffset; 4386 endOffset = startOffset; 4387 startOffset = tmp; 4388 4389 // Also update the selection with the right offsets in this case. 4390 Selection.setSelection((Spannable) mTextView.getText(), 4391 startOffset, endOffset); 4392 } 4393 4394 // Need to do this to display the handles. 4395 mStartHandle.showAtLocation(startOffset); 4396 mEndHandle.showAtLocation(endOffset); 4397 4398 // No longer the first dragging motion, reset. 4399 mDragAcceleratorActive = false; 4400 mStartOffset = -1; 4401 } 4402 break; 4403 } 4404 } 4405 4406 /** 4407 * @param event 4408 */ 4409 private void updateMinAndMaxOffsets(MotionEvent event) { 4410 int pointerCount = event.getPointerCount(); 4411 for (int index = 0; index < pointerCount; index++) { 4412 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4413 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4414 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4415 } 4416 } 4417 4418 public int getMinTouchOffset() { 4419 return mMinTouchOffset; 4420 } 4421 4422 public int getMaxTouchOffset() { 4423 return mMaxTouchOffset; 4424 } 4425 4426 public void resetTouchOffsets() { 4427 mMinTouchOffset = mMaxTouchOffset = -1; 4428 mStartOffset = -1; 4429 mDragAcceleratorActive = false; 4430 } 4431 4432 /** 4433 * @return true iff this controller is currently used to move the selection start. 4434 */ 4435 public boolean isSelectionStartDragged() { 4436 return mStartHandle != null && mStartHandle.isDragging(); 4437 } 4438 4439 /** 4440 * @return true if the user is selecting text using the drag accelerator. 4441 */ 4442 public boolean isDragAcceleratorActive() { 4443 return mDragAcceleratorActive; 4444 } 4445 4446 public void onTouchModeChanged(boolean isInTouchMode) { 4447 if (!isInTouchMode) { 4448 hide(); 4449 } 4450 } 4451 4452 @Override 4453 public void onDetached() { 4454 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4455 observer.removeOnTouchModeChangeListener(this); 4456 4457 if (mStartHandle != null) mStartHandle.onDetached(); 4458 if (mEndHandle != null) mEndHandle.onDetached(); 4459 } 4460 } 4461 4462 private class CorrectionHighlighter { 4463 private final Path mPath = new Path(); 4464 private final Paint mPaint = new Paint(); 4465 private int mStart, mEnd; 4466 private long mFadingStartTime; 4467 private RectF mTempRectF; 4468 private final static int FADE_OUT_DURATION = 400; 4469 4470 public CorrectionHighlighter() { 4471 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4472 applicationScale); 4473 mPaint.setStyle(Paint.Style.FILL); 4474 } 4475 4476 public void highlight(CorrectionInfo info) { 4477 mStart = info.getOffset(); 4478 mEnd = mStart + info.getNewText().length(); 4479 mFadingStartTime = SystemClock.uptimeMillis(); 4480 4481 if (mStart < 0 || mEnd < 0) { 4482 stopAnimation(); 4483 } 4484 } 4485 4486 public void draw(Canvas canvas, int cursorOffsetVertical) { 4487 if (updatePath() && updatePaint()) { 4488 if (cursorOffsetVertical != 0) { 4489 canvas.translate(0, cursorOffsetVertical); 4490 } 4491 4492 canvas.drawPath(mPath, mPaint); 4493 4494 if (cursorOffsetVertical != 0) { 4495 canvas.translate(0, -cursorOffsetVertical); 4496 } 4497 invalidate(true); // TODO invalidate cursor region only 4498 } else { 4499 stopAnimation(); 4500 invalidate(false); // TODO invalidate cursor region only 4501 } 4502 } 4503 4504 private boolean updatePaint() { 4505 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4506 if (duration > FADE_OUT_DURATION) return false; 4507 4508 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4509 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4510 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4511 ((int) (highlightColorAlpha * coef) << 24); 4512 mPaint.setColor(color); 4513 return true; 4514 } 4515 4516 private boolean updatePath() { 4517 final Layout layout = mTextView.getLayout(); 4518 if (layout == null) return false; 4519 4520 // Update in case text is edited while the animation is run 4521 final int length = mTextView.getText().length(); 4522 int start = Math.min(length, mStart); 4523 int end = Math.min(length, mEnd); 4524 4525 mPath.reset(); 4526 layout.getSelectionPath(start, end, mPath); 4527 return true; 4528 } 4529 4530 private void invalidate(boolean delayed) { 4531 if (mTextView.getLayout() == null) return; 4532 4533 if (mTempRectF == null) mTempRectF = new RectF(); 4534 mPath.computeBounds(mTempRectF, false); 4535 4536 int left = mTextView.getCompoundPaddingLeft(); 4537 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4538 4539 if (delayed) { 4540 mTextView.postInvalidateOnAnimation( 4541 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4542 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4543 } else { 4544 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4545 (int) mTempRectF.right, (int) mTempRectF.bottom); 4546 } 4547 } 4548 4549 private void stopAnimation() { 4550 Editor.this.mCorrectionHighlighter = null; 4551 } 4552 } 4553 4554 private static class ErrorPopup extends PopupWindow { 4555 private boolean mAbove = false; 4556 private final TextView mView; 4557 private int mPopupInlineErrorBackgroundId = 0; 4558 private int mPopupInlineErrorAboveBackgroundId = 0; 4559 4560 ErrorPopup(TextView v, int width, int height) { 4561 super(v, width, height); 4562 mView = v; 4563 // Make sure the TextView has a background set as it will be used the first time it is 4564 // shown and positioned. Initialized with below background, which should have 4565 // dimensions identical to the above version for this to work (and is more likely). 4566 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4567 com.android.internal.R.styleable.Theme_errorMessageBackground); 4568 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4569 } 4570 4571 void fixDirection(boolean above) { 4572 mAbove = above; 4573 4574 if (above) { 4575 mPopupInlineErrorAboveBackgroundId = 4576 getResourceId(mPopupInlineErrorAboveBackgroundId, 4577 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4578 } else { 4579 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4580 com.android.internal.R.styleable.Theme_errorMessageBackground); 4581 } 4582 4583 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4584 mPopupInlineErrorBackgroundId); 4585 } 4586 4587 private int getResourceId(int currentId, int index) { 4588 if (currentId == 0) { 4589 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4590 R.styleable.Theme); 4591 currentId = styledAttributes.getResourceId(index, 0); 4592 styledAttributes.recycle(); 4593 } 4594 return currentId; 4595 } 4596 4597 @Override 4598 public void update(int x, int y, int w, int h, boolean force) { 4599 super.update(x, y, w, h, force); 4600 4601 boolean above = isAboveAnchor(); 4602 if (above != mAbove) { 4603 fixDirection(above); 4604 } 4605 } 4606 } 4607 4608 static class InputContentType { 4609 int imeOptions = EditorInfo.IME_NULL; 4610 String privateImeOptions; 4611 CharSequence imeActionLabel; 4612 int imeActionId; 4613 Bundle extras; 4614 OnEditorActionListener onEditorActionListener; 4615 boolean enterDown; 4616 } 4617 4618 static class InputMethodState { 4619 Rect mCursorRectInWindow = new Rect(); 4620 float[] mTmpOffset = new float[2]; 4621 ExtractedTextRequest mExtractedTextRequest; 4622 final ExtractedText mExtractedText = new ExtractedText(); 4623 int mBatchEditNesting; 4624 boolean mCursorChanged; 4625 boolean mSelectionModeChanged; 4626 boolean mContentChanged; 4627 int mChangedStart, mChangedEnd, mChangedDelta; 4628 } 4629 4630 /** 4631 * @return True iff (start, end) is a valid range within the text. 4632 */ 4633 private static boolean isValidRange(CharSequence text, int start, int end) { 4634 return 0 <= start && start <= end && end <= text.length(); 4635 } 4636 4637 /** 4638 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4639 * text being typed (and hence always returns null from the filter() method). 4640 */ 4641 public static class UndoInputFilter implements InputFilter { 4642 private final Editor mEditor; 4643 4644 // Whether the current filter pass is directly caused by an end-user text edit. 4645 private boolean mIsUserEdit; 4646 4647 // Whether the text field is handling an IME composition. Must be parceled in case the user 4648 // rotates the screen during composition. 4649 private boolean mHasComposition; 4650 4651 public UndoInputFilter(Editor editor) { 4652 mEditor = editor; 4653 } 4654 4655 public void saveInstanceState(Parcel parcel) { 4656 parcel.writeInt(mIsUserEdit ? 1 : 0); 4657 parcel.writeInt(mHasComposition ? 1 : 0); 4658 } 4659 4660 public void restoreInstanceState(Parcel parcel) { 4661 mIsUserEdit = parcel.readInt() != 0; 4662 mHasComposition = parcel.readInt() != 0; 4663 } 4664 4665 /** 4666 * Signals that a user-triggered edit is starting. 4667 */ 4668 public void beginBatchEdit() { 4669 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4670 mIsUserEdit = true; 4671 } 4672 4673 public void endBatchEdit() { 4674 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4675 mIsUserEdit = false; 4676 } 4677 4678 @Override 4679 public CharSequence filter(CharSequence source, int start, int end, 4680 Spanned dest, int dstart, int dend) { 4681 if (DEBUG_UNDO) { 4682 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4683 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4684 } 4685 4686 // Check to see if this edit should be tracked for undo. 4687 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4688 return null; 4689 } 4690 4691 // Check for and handle IME composition edits. 4692 if (handleCompositionEdit(source, start, end, dstart)) { 4693 return null; 4694 } 4695 4696 // Handle keyboard edits. 4697 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4698 return null; 4699 } 4700 4701 /** 4702 * Returns true iff the edit was handled, either because it should be ignored or because 4703 * this function created an undo operation for it. 4704 */ 4705 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4706 // Ignore edits while the user is composing. 4707 if (isComposition(source)) { 4708 mHasComposition = true; 4709 return true; 4710 } 4711 final boolean hadComposition = mHasComposition; 4712 mHasComposition = false; 4713 4714 // Check for the transition out of the composing state. 4715 if (hadComposition) { 4716 // If there was no text the user canceled composition. Ignore the edit. 4717 if (start == end) { 4718 return true; 4719 } 4720 4721 // Otherwise the user inserted the composition. 4722 String newText = TextUtils.substring(source, start, end); 4723 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4724 recordEdit(edit, false /* forceMerge */); 4725 return true; 4726 } 4727 4728 // This was neither a composition event nor a transition out of composing. 4729 return false; 4730 } 4731 4732 private void handleKeyboardEdit(CharSequence source, int start, int end, 4733 Spanned dest, int dstart, int dend) { 4734 // An application may install a TextWatcher to provide additional modifications after 4735 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4736 // string). This results in multiple filter() calls for what the user considers to be 4737 // a single operation. Always undo the whole set of changes in one step. 4738 final boolean forceMerge = isInTextWatcher(); 4739 4740 // Build a new operation with all the information from this edit. 4741 String newText = TextUtils.substring(source, start, end); 4742 String oldText = TextUtils.substring(dest, dstart, dend); 4743 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4744 recordEdit(edit, forceMerge); 4745 } 4746 4747 /** 4748 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4749 * If forceMerge is true then the new edit is always merged. 4750 */ 4751 private void recordEdit(EditOperation edit, boolean forceMerge) { 4752 // Fetch the last edit operation and attempt to merge in the new edit. 4753 final UndoManager um = mEditor.mUndoManager; 4754 um.beginUpdate("Edit text"); 4755 EditOperation lastEdit = um.getLastOperation( 4756 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4757 if (lastEdit == null) { 4758 // Add this as the first edit. 4759 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4760 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4761 } else if (forceMerge) { 4762 // Forced merges take priority because they could be the result of a non-user-edit 4763 // change and this case should not create a new undo operation. 4764 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4765 lastEdit.forceMergeWith(edit); 4766 } else if (!mIsUserEdit) { 4767 // An application directly modified the Editable outside of a text edit. Treat this 4768 // as a new change and don't attempt to merge. 4769 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4770 um.commitState(mEditor.mUndoOwner); 4771 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4772 } else if (lastEdit.mergeWith(edit)) { 4773 // Merge succeeded, nothing else to do. 4774 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4775 } else { 4776 // Could not merge with the last edit, so commit the last edit and add this edit. 4777 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4778 um.commitState(mEditor.mUndoOwner); 4779 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4780 } 4781 um.endUpdate(); 4782 } 4783 4784 private boolean canUndoEdit(CharSequence source, int start, int end, 4785 Spanned dest, int dstart, int dend) { 4786 if (!mEditor.mAllowUndo) { 4787 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4788 return false; 4789 } 4790 4791 if (mEditor.mUndoManager.isInUndo()) { 4792 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4793 return false; 4794 } 4795 4796 // Text filters run before input operations are applied. However, some input operations 4797 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4798 // attempt to undo invalid operations. 4799 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4800 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4801 return false; 4802 } 4803 4804 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4805 // on an input field. Skip no-op changes. 4806 if (start == end && dstart == dend) { 4807 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4808 return false; 4809 } 4810 4811 return true; 4812 } 4813 4814 private boolean isComposition(CharSequence source) { 4815 if (!(source instanceof Spannable)) { 4816 return false; 4817 } 4818 // This is a composition edit if the source has a non-zero-length composing span. 4819 Spannable text = (Spannable) source; 4820 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4821 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4822 return composeBegin < composeEnd; 4823 } 4824 4825 private boolean isInTextWatcher() { 4826 CharSequence text = mEditor.mTextView.getText(); 4827 return (text instanceof SpannableStringBuilder) 4828 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4829 } 4830 } 4831 4832 /** 4833 * An operation to undo a single "edit" to a text view. 4834 */ 4835 public static class EditOperation extends UndoOperation<Editor> { 4836 private static final int TYPE_INSERT = 0; 4837 private static final int TYPE_DELETE = 1; 4838 private static final int TYPE_REPLACE = 2; 4839 4840 private int mType; 4841 private String mOldText; 4842 private int mOldTextStart; 4843 private String mNewText; 4844 private int mNewTextStart; 4845 4846 private int mOldCursorPos; 4847 private int mNewCursorPos; 4848 4849 /** 4850 * Constructs an edit operation from a text input operation on editor that replaces the 4851 * oldText starting at dstart with newText. 4852 */ 4853 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 4854 super(editor.mUndoOwner); 4855 mOldText = oldText; 4856 mNewText = newText; 4857 4858 // Determine the type of the edit and store where it occurred. Avoid storing 4859 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4860 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4861 // outside the bounds of the final text). 4862 if (mNewText.length() > 0 && mOldText.length() == 0) { 4863 mType = TYPE_INSERT; 4864 mNewTextStart = dstart; 4865 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4866 mType = TYPE_DELETE; 4867 mOldTextStart = dstart; 4868 } else { 4869 mType = TYPE_REPLACE; 4870 mOldTextStart = mNewTextStart = dstart; 4871 } 4872 4873 // Store cursor data. 4874 mOldCursorPos = editor.mTextView.getSelectionStart(); 4875 mNewCursorPos = dstart + mNewText.length(); 4876 } 4877 4878 public EditOperation(Parcel src, ClassLoader loader) { 4879 super(src, loader); 4880 mType = src.readInt(); 4881 mOldText = src.readString(); 4882 mOldTextStart = src.readInt(); 4883 mNewText = src.readString(); 4884 mNewTextStart = src.readInt(); 4885 mOldCursorPos = src.readInt(); 4886 mNewCursorPos = src.readInt(); 4887 } 4888 4889 @Override 4890 public void writeToParcel(Parcel dest, int flags) { 4891 dest.writeInt(mType); 4892 dest.writeString(mOldText); 4893 dest.writeInt(mOldTextStart); 4894 dest.writeString(mNewText); 4895 dest.writeInt(mNewTextStart); 4896 dest.writeInt(mOldCursorPos); 4897 dest.writeInt(mNewCursorPos); 4898 } 4899 4900 private int getNewTextEnd() { 4901 return mNewTextStart + mNewText.length(); 4902 } 4903 4904 private int getOldTextEnd() { 4905 return mOldTextStart + mOldText.length(); 4906 } 4907 4908 @Override 4909 public void commit() { 4910 } 4911 4912 @Override 4913 public void undo() { 4914 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4915 // Remove the new text and insert the old. 4916 Editor editor = getOwnerData(); 4917 Editable text = (Editable) editor.mTextView.getText(); 4918 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4919 mOldCursorPos); 4920 } 4921 4922 @Override 4923 public void redo() { 4924 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4925 // Remove the old text and insert the new. 4926 Editor editor = getOwnerData(); 4927 Editable text = (Editable) editor.mTextView.getText(); 4928 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4929 mNewCursorPos); 4930 } 4931 4932 /** 4933 * Attempts to merge this existing operation with a new edit. 4934 * @param edit The new edit operation. 4935 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4936 * object unchanged. 4937 */ 4938 private boolean mergeWith(EditOperation edit) { 4939 if (DEBUG_UNDO) { 4940 Log.d(TAG, "mergeWith old " + this); 4941 Log.d(TAG, "mergeWith new " + edit); 4942 } 4943 switch (mType) { 4944 case TYPE_INSERT: 4945 return mergeInsertWith(edit); 4946 case TYPE_DELETE: 4947 return mergeDeleteWith(edit); 4948 case TYPE_REPLACE: 4949 return mergeReplaceWith(edit); 4950 default: 4951 return false; 4952 } 4953 } 4954 4955 private boolean mergeInsertWith(EditOperation edit) { 4956 // Only merge continuous insertions. 4957 if (edit.mType != TYPE_INSERT) { 4958 return false; 4959 } 4960 // Only merge insertions that are contiguous. 4961 if (getNewTextEnd() != edit.mNewTextStart) { 4962 return false; 4963 } 4964 mNewText += edit.mNewText; 4965 mNewCursorPos = edit.mNewCursorPos; 4966 return true; 4967 } 4968 4969 // TODO: Support forward delete. 4970 private boolean mergeDeleteWith(EditOperation edit) { 4971 // Only merge continuous deletes. 4972 if (edit.mType != TYPE_DELETE) { 4973 return false; 4974 } 4975 // Only merge deletions that are contiguous. 4976 if (mOldTextStart != edit.getOldTextEnd()) { 4977 return false; 4978 } 4979 mOldTextStart = edit.mOldTextStart; 4980 mOldText = edit.mOldText + mOldText; 4981 mNewCursorPos = edit.mNewCursorPos; 4982 return true; 4983 } 4984 4985 private boolean mergeReplaceWith(EditOperation edit) { 4986 // Replacements can merge only with adjacent inserts. 4987 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 4988 return false; 4989 } 4990 mOldText += edit.mOldText; 4991 mNewText += edit.mNewText; 4992 mNewCursorPos = edit.mNewCursorPos; 4993 return true; 4994 } 4995 4996 /** 4997 * Forcibly creates a single merged edit operation by simulating the entire text 4998 * contents being replaced. 4999 */ 5000 public void forceMergeWith(EditOperation edit) { 5001 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5002 Editor editor = getOwnerData(); 5003 5004 // Copy the text of the current field. 5005 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5006 // but would require two parallel implementations of modifyText() because Editable and 5007 // StringBuilder do not share an interface for replace/delete/insert. 5008 Editable editable = (Editable) editor.mTextView.getText(); 5009 Editable originalText = new SpannableStringBuilder(editable.toString()); 5010 5011 // Roll back the last operation. 5012 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5013 mOldCursorPos); 5014 5015 // Clone the text again and apply the new operation. 5016 Editable finalText = new SpannableStringBuilder(editable.toString()); 5017 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5018 edit.mNewTextStart, edit.mNewCursorPos); 5019 5020 // Convert this operation into a non-mergeable replacement of the entire string. 5021 mType = TYPE_REPLACE; 5022 mNewText = finalText.toString(); 5023 mNewTextStart = 0; 5024 mOldText = originalText.toString(); 5025 mOldTextStart = 0; 5026 mNewCursorPos = edit.mNewCursorPos; 5027 // mOldCursorPos is unchanged. 5028 } 5029 5030 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5031 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5032 // Apply the edit if it is still valid. 5033 if (isValidRange(text, deleteFrom, deleteTo) && 5034 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5035 if (deleteFrom != deleteTo) { 5036 text.delete(deleteFrom, deleteTo); 5037 } 5038 if (newText.length() != 0) { 5039 text.insert(newTextInsertAt, newText); 5040 } 5041 } 5042 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5043 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5044 // TODO: Select all the text that was undone. 5045 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5046 Selection.setSelection(text, newCursorPos); 5047 } 5048 } 5049 5050 private String getTypeString() { 5051 switch (mType) { 5052 case TYPE_INSERT: 5053 return "insert"; 5054 case TYPE_DELETE: 5055 return "delete"; 5056 case TYPE_REPLACE: 5057 return "replace"; 5058 default: 5059 return ""; 5060 } 5061 } 5062 5063 @Override 5064 public String toString() { 5065 return "[mType=" + getTypeString() + ", " + 5066 "mOldText=" + mOldText + ", " + 5067 "mOldTextStart=" + mOldTextStart + ", " + 5068 "mNewText=" + mNewText + ", " + 5069 "mNewTextStart=" + mNewTextStart + ", " + 5070 "mOldCursorPos=" + mOldCursorPos + ", " + 5071 "mNewCursorPos=" + mNewCursorPos + "]"; 5072 } 5073 5074 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5075 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5076 @Override 5077 public EditOperation createFromParcel(Parcel in) { 5078 return new EditOperation(in, null); 5079 } 5080 5081 @Override 5082 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5083 return new EditOperation(in, loader); 5084 } 5085 5086 @Override 5087 public EditOperation[] newArray(int size) { 5088 return new EditOperation[size]; 5089 } 5090 }; 5091 } 5092} 5093