Editor.java revision 636a0da80533eff7fa8b67afb07277b0ba065d7c
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 resumeBlink(); 322 } 323 324 void onDetachedFromWindow() { 325 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 326 327 if (mError != null) { 328 hideError(); 329 } 330 331 suspendBlink(); 332 333 if (mInsertionPointCursorController != null) { 334 mInsertionPointCursorController.onDetached(); 335 } 336 337 if (mSelectionModifierCursorController != null) { 338 mSelectionModifierCursorController.onDetached(); 339 } 340 341 if (mShowSuggestionRunnable != null) { 342 mTextView.removeCallbacks(mShowSuggestionRunnable); 343 } 344 345 destroyDisplayListsData(); 346 347 if (mSpellChecker != null) { 348 mSpellChecker.closeSession(); 349 // Forces the creation of a new SpellChecker next time this window is created. 350 // Will handle the cases where the settings has been changed in the meantime. 351 mSpellChecker = null; 352 } 353 354 mPreserveDetachedSelection = true; 355 hideControllers(); 356 mPreserveDetachedSelection = false; 357 mTemporaryDetach = false; 358 } 359 360 private void destroyDisplayListsData() { 361 if (mTextRenderNodes != null) { 362 for (int i = 0; i < mTextRenderNodes.length; i++) { 363 RenderNode displayList = mTextRenderNodes[i] != null 364 ? mTextRenderNodes[i].renderNode : null; 365 if (displayList != null && displayList.isValid()) { 366 displayList.destroyDisplayListData(); 367 } 368 } 369 } 370 } 371 372 private void showError() { 373 if (mTextView.getWindowToken() == null) { 374 mShowErrorAfterAttach = true; 375 return; 376 } 377 378 if (mErrorPopup == null) { 379 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 380 final TextView err = (TextView) inflater.inflate( 381 com.android.internal.R.layout.textview_hint, null); 382 383 final float scale = mTextView.getResources().getDisplayMetrics().density; 384 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 385 mErrorPopup.setFocusable(false); 386 // The user is entering text, so the input method is needed. We 387 // don't want the popup to be displayed on top of it. 388 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 389 } 390 391 TextView tv = (TextView) mErrorPopup.getContentView(); 392 chooseSize(mErrorPopup, mError, tv); 393 tv.setText(mError); 394 395 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 396 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 397 } 398 399 public void setError(CharSequence error, Drawable icon) { 400 mError = TextUtils.stringOrSpannedString(error); 401 mErrorWasChanged = true; 402 403 if (mError == null) { 404 setErrorIcon(null); 405 if (mErrorPopup != null) { 406 if (mErrorPopup.isShowing()) { 407 mErrorPopup.dismiss(); 408 } 409 410 mErrorPopup = null; 411 } 412 mShowErrorAfterAttach = false; 413 } else { 414 setErrorIcon(icon); 415 if (mTextView.isFocused()) { 416 showError(); 417 } 418 } 419 } 420 421 private void setErrorIcon(Drawable icon) { 422 Drawables dr = mTextView.mDrawables; 423 if (dr == null) { 424 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 425 } 426 dr.setErrorDrawable(icon, mTextView); 427 428 mTextView.resetResolvedDrawables(); 429 mTextView.invalidate(); 430 mTextView.requestLayout(); 431 } 432 433 private void hideError() { 434 if (mErrorPopup != null) { 435 if (mErrorPopup.isShowing()) { 436 mErrorPopup.dismiss(); 437 } 438 } 439 440 mShowErrorAfterAttach = false; 441 } 442 443 /** 444 * Returns the X offset to make the pointy top of the error point 445 * at the middle of the error icon. 446 */ 447 private int getErrorX() { 448 /* 449 * The "25" is the distance between the point and the right edge 450 * of the background 451 */ 452 final float scale = mTextView.getResources().getDisplayMetrics().density; 453 454 final Drawables dr = mTextView.mDrawables; 455 456 final int layoutDirection = mTextView.getLayoutDirection(); 457 int errorX; 458 int offset; 459 switch (layoutDirection) { 460 default: 461 case View.LAYOUT_DIRECTION_LTR: 462 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 463 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 464 mTextView.getPaddingRight() + offset; 465 break; 466 case View.LAYOUT_DIRECTION_RTL: 467 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 468 errorX = mTextView.getPaddingLeft() + offset; 469 break; 470 } 471 return errorX; 472 } 473 474 /** 475 * Returns the Y offset to make the pointy top of the error point 476 * at the bottom of the error icon. 477 */ 478 private int getErrorY() { 479 /* 480 * Compound, not extended, because the icon is not clipped 481 * if the text height is smaller. 482 */ 483 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 484 int vspace = mTextView.getBottom() - mTextView.getTop() - 485 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 486 487 final Drawables dr = mTextView.mDrawables; 488 489 final int layoutDirection = mTextView.getLayoutDirection(); 490 int height; 491 switch (layoutDirection) { 492 default: 493 case View.LAYOUT_DIRECTION_LTR: 494 height = (dr != null ? dr.mDrawableHeightRight : 0); 495 break; 496 case View.LAYOUT_DIRECTION_RTL: 497 height = (dr != null ? dr.mDrawableHeightLeft : 0); 498 break; 499 } 500 501 int icontop = compoundPaddingTop + (vspace - height) / 2; 502 503 /* 504 * The "2" is the distance between the point and the top edge 505 * of the background. 506 */ 507 final float scale = mTextView.getResources().getDisplayMetrics().density; 508 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 509 } 510 511 void createInputContentTypeIfNeeded() { 512 if (mInputContentType == null) { 513 mInputContentType = new InputContentType(); 514 } 515 } 516 517 void createInputMethodStateIfNeeded() { 518 if (mInputMethodState == null) { 519 mInputMethodState = new InputMethodState(); 520 } 521 } 522 523 boolean isCursorVisible() { 524 // The default value is true, even when there is no associated Editor 525 return mCursorVisible && mTextView.isTextEditable(); 526 } 527 528 void prepareCursorControllers() { 529 boolean windowSupportsHandles = false; 530 531 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 532 if (params instanceof WindowManager.LayoutParams) { 533 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 534 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 535 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 536 } 537 538 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 539 mInsertionControllerEnabled = enabled && isCursorVisible(); 540 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 541 542 if (!mInsertionControllerEnabled) { 543 hideInsertionPointCursorController(); 544 if (mInsertionPointCursorController != null) { 545 mInsertionPointCursorController.onDetached(); 546 mInsertionPointCursorController = null; 547 } 548 } 549 550 if (!mSelectionControllerEnabled) { 551 stopSelectionActionMode(); 552 if (mSelectionModifierCursorController != null) { 553 mSelectionModifierCursorController.onDetached(); 554 mSelectionModifierCursorController = null; 555 } 556 } 557 } 558 559 void hideInsertionPointCursorController() { 560 if (mInsertionPointCursorController != null) { 561 mInsertionPointCursorController.hide(); 562 } 563 } 564 565 /** 566 * Hides the insertion controller and stops text selection mode, hiding the selection controller 567 */ 568 void hideControllers() { 569 hideCursorControllers(); 570 hideSpanControllers(); 571 } 572 573 private void hideSpanControllers() { 574 if (mSpanController != null) { 575 mSpanController.hide(); 576 } 577 } 578 579 private void hideCursorControllers() { 580 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 581 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 582 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 583 // to distinguish one from the other. 584 if (mSuggestionsPopupWindow != null && ((mTextView instanceof ExtractEditText) || 585 !mSuggestionsPopupWindow.isShowingUp())) { 586 // Should be done before hide insertion point controller since it triggers a show of it 587 mSuggestionsPopupWindow.hide(); 588 } 589 hideInsertionPointCursorController(); 590 stopSelectionActionMode(); 591 } 592 593 /** 594 * Create new SpellCheckSpans on the modified region. 595 */ 596 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 597 // Remove spans whose adjacent characters are text not punctuation 598 mTextView.removeAdjacentSuggestionSpans(start); 599 mTextView.removeAdjacentSuggestionSpans(end); 600 601 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 602 !(mTextView instanceof ExtractEditText)) { 603 if (mSpellChecker == null && createSpellChecker) { 604 mSpellChecker = new SpellChecker(mTextView); 605 } 606 if (mSpellChecker != null) { 607 mSpellChecker.spellCheck(start, end); 608 } 609 } 610 } 611 612 void onScreenStateChanged(int screenState) { 613 switch (screenState) { 614 case View.SCREEN_STATE_ON: 615 resumeBlink(); 616 break; 617 case View.SCREEN_STATE_OFF: 618 suspendBlink(); 619 break; 620 } 621 } 622 623 private void suspendBlink() { 624 if (mBlink != null) { 625 mBlink.cancel(); 626 } 627 } 628 629 private void resumeBlink() { 630 if (mBlink != null) { 631 mBlink.uncancel(); 632 makeBlink(); 633 } 634 } 635 636 void adjustInputType(boolean password, boolean passwordInputType, 637 boolean webPasswordInputType, boolean numberPasswordInputType) { 638 // mInputType has been set from inputType, possibly modified by mInputMethod. 639 // Specialize mInputType to [web]password if we have a text class and the original input 640 // type was a password. 641 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 642 if (password || passwordInputType) { 643 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 644 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 645 } 646 if (webPasswordInputType) { 647 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 648 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 649 } 650 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 651 if (numberPasswordInputType) { 652 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 653 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 654 } 655 } 656 } 657 658 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 659 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 660 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 661 662 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 663 com.android.internal.R.dimen.textview_error_popup_default_width); 664 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 665 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 666 float max = 0; 667 for (int i = 0; i < l.getLineCount(); i++) { 668 max = Math.max(max, l.getLineWidth(i)); 669 } 670 671 /* 672 * Now set the popup size to be big enough for the text plus the border capped 673 * to DEFAULT_MAX_POPUP_WIDTH 674 */ 675 pop.setWidth(wid + (int) Math.ceil(max)); 676 pop.setHeight(ht + l.getHeight()); 677 } 678 679 void setFrame() { 680 if (mErrorPopup != null) { 681 TextView tv = (TextView) mErrorPopup.getContentView(); 682 chooseSize(mErrorPopup, mError, tv); 683 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 684 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 685 } 686 } 687 688 private int getWordStart(int offset) { 689 // FIXME - For this and similar methods we're not doing anything to check if there's 690 // a LocaleSpan in the text, this may be something we should try handling or checking for. 691 int retOffset = getWordIteratorWithText().getBeginning(offset); 692 if (retOffset == BreakIterator.DONE) retOffset = offset; 693 return retOffset; 694 } 695 696 private int getWordEnd(int offset, boolean includePunctuation) { 697 int retOffset = getWordIteratorWithText().getEnd(offset); 698 if (retOffset == BreakIterator.DONE) { 699 retOffset = offset; 700 } else if (includePunctuation) { 701 retOffset = handlePunctuation(retOffset); 702 } 703 return retOffset; 704 } 705 706 private boolean isEndBoundary(int offset) { 707 int thisEnd = getWordEnd(offset, false); 708 return offset == thisEnd; 709 } 710 711 private boolean isStartBoundary(int offset) { 712 int thisStart = getWordStart(offset); 713 return thisStart == offset; 714 } 715 716 private int handlePunctuation(int offset) { 717 // FIXME - Check with UX how repeated ending punctuation should be handled. 718 // FIXME - Check with UX if / how we would handle non sentence ending characters. 719 // FIXME - Consider punctuation in different languages. 720 CharSequence text = mTextView.getText(); 721 if (offset < text.length()) { 722 int c = Character.codePointAt(text, offset); 723 if (c == 0x002e /* period */|| c == 0x003f /* question mark */ 724 || c == 0x0021 /* exclamation mark */) { 725 offset = Character.offsetByCodePoints(text, offset, 1); 726 } 727 } 728 return offset; 729 } 730 731 /** 732 * Adjusts selection to the word under last touch offset. Return true if the operation was 733 * successfully performed. 734 */ 735 private boolean selectCurrentWord() { 736 if (!mTextView.canSelectText()) { 737 return false; 738 } 739 740 if (mTextView.hasPasswordTransformationMethod()) { 741 // Always select all on a password field. 742 // Cut/copy menu entries are not available for passwords, but being able to select all 743 // is however useful to delete or paste to replace the entire content. 744 return mTextView.selectAllText(); 745 } 746 747 int inputType = mTextView.getInputType(); 748 int klass = inputType & InputType.TYPE_MASK_CLASS; 749 int variation = inputType & InputType.TYPE_MASK_VARIATION; 750 751 // Specific text field types: select the entire text for these 752 if (klass == InputType.TYPE_CLASS_NUMBER || 753 klass == InputType.TYPE_CLASS_PHONE || 754 klass == InputType.TYPE_CLASS_DATETIME || 755 variation == InputType.TYPE_TEXT_VARIATION_URI || 756 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 757 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 758 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 759 return mTextView.selectAllText(); 760 } 761 762 long lastTouchOffsets = getLastTouchOffsets(); 763 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 764 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 765 766 // Safety check in case standard touch event handling has been bypassed 767 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 768 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 769 770 int selectionStart, selectionEnd; 771 772 // If a URLSpan (web address, email, phone...) is found at that position, select it. 773 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 774 getSpans(minOffset, maxOffset, URLSpan.class); 775 if (urlSpans.length >= 1) { 776 URLSpan urlSpan = urlSpans[0]; 777 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 778 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 779 } else { 780 // FIXME - We should check if there's a LocaleSpan in the text, this may be 781 // something we should try handling or checking for. 782 final WordIterator wordIterator = getWordIterator(); 783 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 784 785 selectionStart = wordIterator.getBeginning(minOffset); 786 selectionEnd = wordIterator.getEnd(maxOffset); 787 788 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 789 selectionStart == selectionEnd) { 790 // Possible when the word iterator does not properly handle the text's language 791 long range = getCharClusterRange(minOffset); 792 selectionStart = TextUtils.unpackRangeStartFromLong(range); 793 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 794 } 795 } 796 797 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 798 return selectionEnd > selectionStart; 799 } 800 801 void onLocaleChanged() { 802 // Will be re-created on demand in getWordIterator with the proper new locale 803 mWordIterator = null; 804 mWordIteratorWithText = null; 805 } 806 807 /** 808 * @hide 809 */ 810 public WordIterator getWordIterator() { 811 if (mWordIterator == null) { 812 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 813 } 814 return mWordIterator; 815 } 816 817 private WordIterator getWordIteratorWithText() { 818 if (mWordIteratorWithText == null) { 819 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 820 mUpdateWordIteratorText = true; 821 } 822 if (mUpdateWordIteratorText) { 823 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 824 // to the user's selection is needed. A possible solution would be to 825 // copy some number N of characters near the selection and then when the 826 // user approaches N then we'd do another copy of the next N characters. 827 CharSequence text = mTextView.getText(); 828 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 829 mUpdateWordIteratorText = false; 830 } 831 return mWordIteratorWithText; 832 } 833 834 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 835 final Layout layout = mTextView.getLayout(); 836 if (layout == null) return offset; 837 final CharSequence text = mTextView.getText(); 838 final int nextOffset = layout.getPaint().getTextRunCursor(text, 0, text.length(), 839 layout.isRtlCharAt(offset) ? Paint.DIRECTION_RTL : Paint.DIRECTION_LTR, 840 offset, findAfterGivenOffset ? Paint.CURSOR_AFTER : Paint.CURSOR_BEFORE); 841 return nextOffset == -1 ? offset : nextOffset; 842 } 843 844 private long getCharClusterRange(int offset) { 845 final int textLength = mTextView.getText().length(); 846 if (offset < textLength) { 847 return TextUtils.packRangeInLong(offset, getNextCursorOffset(offset, true)); 848 } 849 if (offset - 1 >= 0) { 850 return TextUtils.packRangeInLong(getNextCursorOffset(offset, false), 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 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1401 // We are in extract mode and the content has changed 1402 // in some way... just report complete new text to the 1403 // input method. 1404 reportExtractedText(); 1405 } 1406 } 1407 } 1408 } 1409 1410 if (mCorrectionHighlighter != null) { 1411 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1412 } 1413 1414 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1415 drawCursor(canvas, cursorOffsetVertical); 1416 // Rely on the drawable entirely, do not draw the cursor line. 1417 // Has to be done after the IMM related code above which relies on the highlight. 1418 highlight = null; 1419 } 1420 1421 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1422 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1423 cursorOffsetVertical); 1424 } else { 1425 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1426 } 1427 } 1428 1429 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1430 Paint highlightPaint, int cursorOffsetVertical) { 1431 final long lineRange = layout.getLineRangeForDraw(canvas); 1432 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1433 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1434 if (lastLine < 0) return; 1435 1436 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1437 firstLine, lastLine); 1438 1439 if (layout instanceof DynamicLayout) { 1440 if (mTextRenderNodes == null) { 1441 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1442 } 1443 1444 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1445 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1446 int[] blockIndices = dynamicLayout.getBlockIndices(); 1447 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1448 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1449 1450 int endOfPreviousBlock = -1; 1451 int searchStartIndex = 0; 1452 for (int i = 0; i < numberOfBlocks; i++) { 1453 int blockEndLine = blockEndLines[i]; 1454 int blockIndex = blockIndices[i]; 1455 1456 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1457 if (blockIsInvalid) { 1458 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1459 searchStartIndex); 1460 // Note how dynamic layout's internal block indices get updated from Editor 1461 blockIndices[i] = blockIndex; 1462 if (mTextRenderNodes[blockIndex] != null) { 1463 mTextRenderNodes[blockIndex].isDirty = true; 1464 } 1465 searchStartIndex = blockIndex + 1; 1466 } 1467 1468 if (mTextRenderNodes[blockIndex] == null) { 1469 mTextRenderNodes[blockIndex] = 1470 new TextRenderNode("Text " + blockIndex); 1471 } 1472 1473 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1474 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1475 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1476 final int blockBeginLine = endOfPreviousBlock + 1; 1477 final int top = layout.getLineTop(blockBeginLine); 1478 final int bottom = layout.getLineBottom(blockEndLine); 1479 int left = 0; 1480 int right = mTextView.getWidth(); 1481 if (mTextView.getHorizontallyScrolling()) { 1482 float min = Float.MAX_VALUE; 1483 float max = Float.MIN_VALUE; 1484 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1485 min = Math.min(min, layout.getLineLeft(line)); 1486 max = Math.max(max, layout.getLineRight(line)); 1487 } 1488 left = (int) min; 1489 right = (int) (max + 0.5f); 1490 } 1491 1492 // Rebuild display list if it is invalid 1493 if (blockDisplayListIsInvalid) { 1494 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1495 right - left, bottom - top); 1496 try { 1497 // drawText is always relative to TextView's origin, this translation 1498 // brings this range of text back to the top left corner of the viewport 1499 displayListCanvas.translate(-left, -top); 1500 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1501 mTextRenderNodes[blockIndex].isDirty = false; 1502 // No need to untranslate, previous context is popped after 1503 // drawDisplayList 1504 } finally { 1505 blockDisplayList.end(displayListCanvas); 1506 // Same as drawDisplayList below, handled by our TextView's parent 1507 blockDisplayList.setClipToBounds(false); 1508 } 1509 } 1510 1511 // Valid disply list whose index is >= indexFirstChangedBlock 1512 // only needs to update its drawing location. 1513 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1514 } 1515 1516 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1517 1518 endOfPreviousBlock = blockEndLine; 1519 } 1520 1521 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1522 } else { 1523 // Boring layout is used for empty and hint text 1524 layout.drawText(canvas, firstLine, lastLine); 1525 } 1526 } 1527 1528 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1529 int searchStartIndex) { 1530 int length = mTextRenderNodes.length; 1531 for (int i = searchStartIndex; i < length; i++) { 1532 boolean blockIndexFound = false; 1533 for (int j = 0; j < numberOfBlocks; j++) { 1534 if (blockIndices[j] == i) { 1535 blockIndexFound = true; 1536 break; 1537 } 1538 } 1539 if (blockIndexFound) continue; 1540 return i; 1541 } 1542 1543 // No available index found, the pool has to grow 1544 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1545 return length; 1546 } 1547 1548 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1549 final boolean translate = cursorOffsetVertical != 0; 1550 if (translate) canvas.translate(0, cursorOffsetVertical); 1551 for (int i = 0; i < mCursorCount; i++) { 1552 mCursorDrawable[i].draw(canvas); 1553 } 1554 if (translate) canvas.translate(0, -cursorOffsetVertical); 1555 } 1556 1557 /** 1558 * Invalidates all the sub-display lists that overlap the specified character range 1559 */ 1560 void invalidateTextDisplayList(Layout layout, int start, int end) { 1561 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1562 final int firstLine = layout.getLineForOffset(start); 1563 final int lastLine = layout.getLineForOffset(end); 1564 1565 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1566 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1567 int[] blockIndices = dynamicLayout.getBlockIndices(); 1568 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1569 1570 int i = 0; 1571 // Skip the blocks before firstLine 1572 while (i < numberOfBlocks) { 1573 if (blockEndLines[i] >= firstLine) break; 1574 i++; 1575 } 1576 1577 // Invalidate all subsequent blocks until lastLine is passed 1578 while (i < numberOfBlocks) { 1579 final int blockIndex = blockIndices[i]; 1580 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1581 mTextRenderNodes[blockIndex].isDirty = true; 1582 } 1583 if (blockEndLines[i] >= lastLine) break; 1584 i++; 1585 } 1586 } 1587 } 1588 1589 void invalidateTextDisplayList() { 1590 if (mTextRenderNodes != null) { 1591 for (int i = 0; i < mTextRenderNodes.length; i++) { 1592 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1593 } 1594 } 1595 } 1596 1597 void updateCursorsPositions() { 1598 if (mTextView.mCursorDrawableRes == 0) { 1599 mCursorCount = 0; 1600 return; 1601 } 1602 1603 Layout layout = mTextView.getLayout(); 1604 Layout hintLayout = mTextView.getHintLayout(); 1605 final int offset = mTextView.getSelectionStart(); 1606 final int line = layout.getLineForOffset(offset); 1607 final int top = layout.getLineTop(line); 1608 final int bottom = layout.getLineTop(line + 1); 1609 1610 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1611 1612 int middle = bottom; 1613 if (mCursorCount == 2) { 1614 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1615 middle = (top + bottom) >> 1; 1616 } 1617 1618 boolean clamped = layout.shouldClampCursor(line); 1619 updateCursorPosition(0, top, middle, 1620 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1621 1622 if (mCursorCount == 2) { 1623 updateCursorPosition(1, middle, bottom, 1624 layout.getSecondaryHorizontal(offset, clamped)); 1625 } 1626 } 1627 1628 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1629 boolean clamped) { 1630 if (TextUtils.isEmpty(layout.getText()) && 1631 hintLayout != null && 1632 !TextUtils.isEmpty(hintLayout.getText())) { 1633 return hintLayout.getPrimaryHorizontal(offset, clamped); 1634 } else { 1635 return layout.getPrimaryHorizontal(offset, clamped); 1636 } 1637 } 1638 1639 /** 1640 * @return true if the selection mode was actually started. 1641 */ 1642 private boolean startSelectionActionModeWithoutSelection() { 1643 if (mSelectionActionMode != null) { 1644 // Selection action mode is already started 1645 // TODO: revisit invocations to minimize this case. 1646 mSelectionActionMode.invalidate(); 1647 return false; 1648 } 1649 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1650 mSelectionActionMode = mTextView.startActionMode( 1651 actionModeCallback, ActionMode.TYPE_FLOATING); 1652 return mSelectionActionMode != null; 1653 } 1654 1655 /** 1656 * Starts a Selection Action Mode with the current selection and enters drag mode. This should 1657 * be used whenever the mode is started from a touch event. 1658 * 1659 * @return true if the selection mode was actually started. 1660 */ 1661 private boolean startSelectionActionModeWithSelectionAndStartDrag() { 1662 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1663 if (selectionStarted) { 1664 getSelectionController().enterDrag(); 1665 } 1666 return selectionStarted; 1667 } 1668 1669 /** 1670 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1671 * are shown. This should be used when the mode is started from a non-touch event. 1672 * 1673 * @return true if the selection mode was actually started. 1674 */ 1675 boolean startSelectionActionModeWithSelection() { 1676 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1677 if (selectionStarted) { 1678 getSelectionController().show(); 1679 } 1680 return selectionStarted; 1681 } 1682 1683 private boolean startSelectionActionModeWithSelectionInternal() { 1684 if (mSelectionActionMode != null) { 1685 // Selection action mode is already started 1686 mSelectionActionMode.invalidate(); 1687 return false; 1688 } 1689 1690 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1691 Log.w(TextView.LOG_TAG, 1692 "TextView does not support text selection. Action mode cancelled."); 1693 return false; 1694 } 1695 1696 if (!mTextView.hasSelection()) { 1697 // There may already be a selection on device rotation 1698 if (!selectCurrentWord()) { 1699 // No word found under cursor or text selection not permitted. 1700 return false; 1701 } 1702 } 1703 1704 boolean willExtract = extractedTextModeWillBeStarted(); 1705 1706 // Do not start the action mode when extracted text will show up full screen, which would 1707 // immediately hide the newly created action bar and would be visually distracting. 1708 if (!willExtract) { 1709 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1710 mSelectionActionMode = mTextView.startActionMode( 1711 actionModeCallback, ActionMode.TYPE_FLOATING); 1712 } 1713 1714 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1715 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1716 // Show the IME to be able to replace text, except when selecting non editable text. 1717 final InputMethodManager imm = InputMethodManager.peekInstance(); 1718 if (imm != null) { 1719 imm.showSoftInput(mTextView, 0, null); 1720 } 1721 } 1722 return selectionStarted; 1723 } 1724 1725 private boolean extractedTextModeWillBeStarted() { 1726 if (!(mTextView instanceof ExtractEditText)) { 1727 final InputMethodManager imm = InputMethodManager.peekInstance(); 1728 return imm != null && imm.isFullscreenMode(); 1729 } 1730 return false; 1731 } 1732 1733 /** 1734 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1735 * the current cursor position or selection range. This method is consistent with the 1736 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1737 */ 1738 private boolean shouldOfferToShowSuggestions() { 1739 CharSequence text = mTextView.getText(); 1740 if (!(text instanceof Spannable)) return false; 1741 1742 final Spannable spannable = (Spannable) text; 1743 final int selectionStart = mTextView.getSelectionStart(); 1744 final int selectionEnd = mTextView.getSelectionEnd(); 1745 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1746 SuggestionSpan.class); 1747 if (suggestionSpans.length == 0) { 1748 return false; 1749 } 1750 if (selectionStart == selectionEnd) { 1751 // Spans overlap the cursor. 1752 return true; 1753 } 1754 int minSpanStart = mTextView.getText().length(); 1755 int maxSpanEnd = 0; 1756 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1757 int unionOfSpansCoveringSelectionStartEnd = 0; 1758 for (int i = 0; i < suggestionSpans.length; i++) { 1759 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1760 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1761 minSpanStart = Math.min(minSpanStart, spanStart); 1762 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1763 if (selectionStart < spanStart || selectionStart > spanEnd) { 1764 // The span doesn't cover the current selection start point. 1765 continue; 1766 } 1767 unionOfSpansCoveringSelectionStartStart = 1768 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1769 unionOfSpansCoveringSelectionStartEnd = 1770 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1771 } 1772 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1773 // No spans cover the selection start point. 1774 return false; 1775 } 1776 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1777 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1778 // There is a span that is not covered by the union. In this case, we soouldn't offer 1779 // to show suggestions as it's confusing. 1780 return false; 1781 } 1782 return true; 1783 } 1784 1785 /** 1786 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1787 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1788 */ 1789 private boolean isCursorInsideEasyCorrectionSpan() { 1790 Spannable spannable = (Spannable) mTextView.getText(); 1791 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1792 mTextView.getSelectionEnd(), SuggestionSpan.class); 1793 for (int i = 0; i < suggestionSpans.length; i++) { 1794 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1795 return true; 1796 } 1797 } 1798 return false; 1799 } 1800 1801 void onTouchUpEvent(MotionEvent event) { 1802 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1803 hideControllers(); 1804 CharSequence text = mTextView.getText(); 1805 if (!selectAllGotFocus && text.length() > 0) { 1806 // Move cursor 1807 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1808 Selection.setSelection((Spannable) text, offset); 1809 if (mSpellChecker != null) { 1810 // When the cursor moves, the word that was typed may need spell check 1811 mSpellChecker.onSelectionChanged(); 1812 } 1813 if (!extractedTextModeWillBeStarted()) { 1814 if (isCursorInsideEasyCorrectionSpan()) { 1815 mShowSuggestionRunnable = new Runnable() { 1816 public void run() { 1817 showSuggestions(); 1818 } 1819 }; 1820 // removeCallbacks is performed on every touch 1821 mTextView.postDelayed(mShowSuggestionRunnable, 1822 ViewConfiguration.getDoubleTapTimeout()); 1823 } else if (hasInsertionController()) { 1824 getInsertionController().show(); 1825 } 1826 } 1827 } 1828 } 1829 1830 protected void stopSelectionActionMode() { 1831 if (mSelectionActionMode != null) { 1832 // This will hide the mSelectionModifierCursorController 1833 mSelectionActionMode.finish(); 1834 } 1835 } 1836 1837 /** 1838 * @return True if this view supports insertion handles. 1839 */ 1840 boolean hasInsertionController() { 1841 return mInsertionControllerEnabled; 1842 } 1843 1844 /** 1845 * @return True if this view supports selection handles. 1846 */ 1847 boolean hasSelectionController() { 1848 return mSelectionControllerEnabled; 1849 } 1850 1851 InsertionPointCursorController getInsertionController() { 1852 if (!mInsertionControllerEnabled) { 1853 return null; 1854 } 1855 1856 if (mInsertionPointCursorController == null) { 1857 mInsertionPointCursorController = new InsertionPointCursorController(); 1858 1859 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1860 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1861 } 1862 1863 return mInsertionPointCursorController; 1864 } 1865 1866 SelectionModifierCursorController getSelectionController() { 1867 if (!mSelectionControllerEnabled) { 1868 return null; 1869 } 1870 1871 if (mSelectionModifierCursorController == null) { 1872 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1873 1874 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1875 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1876 } 1877 1878 return mSelectionModifierCursorController; 1879 } 1880 1881 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1882 if (mCursorDrawable[cursorIndex] == null) 1883 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1884 mTextView.mCursorDrawableRes); 1885 1886 if (mTempRect == null) mTempRect = new Rect(); 1887 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1888 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1889 horizontal = Math.max(0.5f, horizontal - 0.5f); 1890 final int left = (int) (horizontal) - mTempRect.left; 1891 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1892 bottom + mTempRect.bottom); 1893 } 1894 1895 /** 1896 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1897 * a dictionary) from the current input method, provided by it calling 1898 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1899 * implementation flashes the background of the corrected word to provide feedback to the user. 1900 * 1901 * @param info The auto correct info about the text that was corrected. 1902 */ 1903 public void onCommitCorrection(CorrectionInfo info) { 1904 if (mCorrectionHighlighter == null) { 1905 mCorrectionHighlighter = new CorrectionHighlighter(); 1906 } else { 1907 mCorrectionHighlighter.invalidate(false); 1908 } 1909 1910 mCorrectionHighlighter.highlight(info); 1911 } 1912 1913 void showSuggestions() { 1914 if (mSuggestionsPopupWindow == null) { 1915 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1916 } 1917 hideControllers(); 1918 mSuggestionsPopupWindow.show(); 1919 } 1920 1921 void onScrollChanged() { 1922 if (mPositionListener != null) { 1923 mPositionListener.onScrollChanged(); 1924 } 1925 if (mSelectionActionMode != null) { 1926 mSelectionActionMode.invalidateContentRect(); 1927 } 1928 } 1929 1930 /** 1931 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1932 */ 1933 private boolean shouldBlink() { 1934 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1935 1936 final int start = mTextView.getSelectionStart(); 1937 if (start < 0) return false; 1938 1939 final int end = mTextView.getSelectionEnd(); 1940 if (end < 0) return false; 1941 1942 return start == end; 1943 } 1944 1945 void makeBlink() { 1946 if (shouldBlink()) { 1947 mShowCursor = SystemClock.uptimeMillis(); 1948 if (mBlink == null) mBlink = new Blink(); 1949 mBlink.removeCallbacks(mBlink); 1950 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 1951 } else { 1952 if (mBlink != null) mBlink.removeCallbacks(mBlink); 1953 } 1954 } 1955 1956 private class Blink extends Handler implements Runnable { 1957 private boolean mCancelled; 1958 1959 public void run() { 1960 if (mCancelled) { 1961 return; 1962 } 1963 1964 removeCallbacks(Blink.this); 1965 1966 if (shouldBlink()) { 1967 if (mTextView.getLayout() != null) { 1968 mTextView.invalidateCursorPath(); 1969 } 1970 1971 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 1972 } 1973 } 1974 1975 void cancel() { 1976 if (!mCancelled) { 1977 removeCallbacks(Blink.this); 1978 mCancelled = true; 1979 } 1980 } 1981 1982 void uncancel() { 1983 mCancelled = false; 1984 } 1985 } 1986 1987 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 1988 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 1989 com.android.internal.R.layout.text_drag_thumbnail, null); 1990 1991 if (shadowView == null) { 1992 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 1993 } 1994 1995 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 1996 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 1997 } 1998 shadowView.setText(text); 1999 shadowView.setTextColor(mTextView.getTextColors()); 2000 2001 shadowView.setTextAppearance(mTextView.getContext(), R.styleable.Theme_textAppearanceLarge); 2002 shadowView.setGravity(Gravity.CENTER); 2003 2004 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2005 ViewGroup.LayoutParams.WRAP_CONTENT)); 2006 2007 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2008 shadowView.measure(size, size); 2009 2010 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2011 shadowView.invalidate(); 2012 return new DragShadowBuilder(shadowView); 2013 } 2014 2015 private static class DragLocalState { 2016 public TextView sourceTextView; 2017 public int start, end; 2018 2019 public DragLocalState(TextView sourceTextView, int start, int end) { 2020 this.sourceTextView = sourceTextView; 2021 this.start = start; 2022 this.end = end; 2023 } 2024 } 2025 2026 void onDrop(DragEvent event) { 2027 StringBuilder content = new StringBuilder(""); 2028 ClipData clipData = event.getClipData(); 2029 final int itemCount = clipData.getItemCount(); 2030 for (int i=0; i < itemCount; i++) { 2031 Item item = clipData.getItemAt(i); 2032 content.append(item.coerceToStyledText(mTextView.getContext())); 2033 } 2034 2035 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2036 2037 Object localState = event.getLocalState(); 2038 DragLocalState dragLocalState = null; 2039 if (localState instanceof DragLocalState) { 2040 dragLocalState = (DragLocalState) localState; 2041 } 2042 boolean dragDropIntoItself = dragLocalState != null && 2043 dragLocalState.sourceTextView == mTextView; 2044 2045 if (dragDropIntoItself) { 2046 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2047 // A drop inside the original selection discards the drop. 2048 return; 2049 } 2050 } 2051 2052 final int originalLength = mTextView.getText().length(); 2053 int min = offset; 2054 int max = offset; 2055 2056 Selection.setSelection((Spannable) mTextView.getText(), max); 2057 mTextView.replaceText_internal(min, max, content); 2058 2059 if (dragDropIntoItself) { 2060 int dragSourceStart = dragLocalState.start; 2061 int dragSourceEnd = dragLocalState.end; 2062 if (max <= dragSourceStart) { 2063 // Inserting text before selection has shifted positions 2064 final int shift = mTextView.getText().length() - originalLength; 2065 dragSourceStart += shift; 2066 dragSourceEnd += shift; 2067 } 2068 2069 // Delete original selection 2070 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2071 2072 // Make sure we do not leave two adjacent spaces. 2073 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2074 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2075 if (nextCharIdx > prevCharIdx + 1) { 2076 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2077 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2078 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2079 } 2080 } 2081 } 2082 } 2083 2084 public void addSpanWatchers(Spannable text) { 2085 final int textLength = text.length(); 2086 2087 if (mKeyListener != null) { 2088 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2089 } 2090 2091 if (mSpanController == null) { 2092 mSpanController = new SpanController(); 2093 } 2094 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2095 } 2096 2097 /** 2098 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2099 * pop-up should be displayed. 2100 * Also monitors {@link Selection} to call back to the attached input method. 2101 */ 2102 class SpanController implements SpanWatcher { 2103 2104 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2105 2106 private EasyEditPopupWindow mPopupWindow; 2107 2108 private Runnable mHidePopup; 2109 2110 // This function is pure but inner classes can't have static functions 2111 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2112 final Object span) { 2113 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2114 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2115 } 2116 2117 @Override 2118 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2119 if (isNonIntermediateSelectionSpan(text, span)) { 2120 sendUpdateSelection(); 2121 } else if (span instanceof EasyEditSpan) { 2122 if (mPopupWindow == null) { 2123 mPopupWindow = new EasyEditPopupWindow(); 2124 mHidePopup = new Runnable() { 2125 @Override 2126 public void run() { 2127 hide(); 2128 } 2129 }; 2130 } 2131 2132 // Make sure there is only at most one EasyEditSpan in the text 2133 if (mPopupWindow.mEasyEditSpan != null) { 2134 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2135 } 2136 2137 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2138 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2139 @Override 2140 public void onDeleteClick(EasyEditSpan span) { 2141 Editable editable = (Editable) mTextView.getText(); 2142 int start = editable.getSpanStart(span); 2143 int end = editable.getSpanEnd(span); 2144 if (start >= 0 && end >= 0) { 2145 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2146 mTextView.deleteText_internal(start, end); 2147 } 2148 editable.removeSpan(span); 2149 } 2150 }); 2151 2152 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2153 // The window is not visible yet, ignore the text change. 2154 return; 2155 } 2156 2157 if (mTextView.getLayout() == null) { 2158 // The view has not been laid out yet, ignore the text change 2159 return; 2160 } 2161 2162 if (extractedTextModeWillBeStarted()) { 2163 // The input is in extract mode. Do not handle the easy edit in 2164 // the original TextView, as the ExtractEditText will do 2165 return; 2166 } 2167 2168 mPopupWindow.show(); 2169 mTextView.removeCallbacks(mHidePopup); 2170 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2171 } 2172 } 2173 2174 @Override 2175 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2176 if (isNonIntermediateSelectionSpan(text, span)) { 2177 sendUpdateSelection(); 2178 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2179 hide(); 2180 } 2181 } 2182 2183 @Override 2184 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2185 int newStart, int newEnd) { 2186 if (isNonIntermediateSelectionSpan(text, span)) { 2187 sendUpdateSelection(); 2188 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2189 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2190 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2191 text.removeSpan(easyEditSpan); 2192 } 2193 } 2194 2195 public void hide() { 2196 if (mPopupWindow != null) { 2197 mPopupWindow.hide(); 2198 mTextView.removeCallbacks(mHidePopup); 2199 } 2200 } 2201 2202 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2203 try { 2204 PendingIntent pendingIntent = span.getPendingIntent(); 2205 if (pendingIntent != null) { 2206 Intent intent = new Intent(); 2207 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2208 pendingIntent.send(mTextView.getContext(), 0, intent); 2209 } 2210 } catch (CanceledException e) { 2211 // This should not happen, as we should try to send the intent only once. 2212 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2213 } 2214 } 2215 } 2216 2217 /** 2218 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2219 */ 2220 private interface EasyEditDeleteListener { 2221 2222 /** 2223 * Clicks the delete pop-up. 2224 */ 2225 void onDeleteClick(EasyEditSpan span); 2226 } 2227 2228 /** 2229 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2230 * by {@link SpanController}. 2231 */ 2232 private class EasyEditPopupWindow extends PinnedPopupWindow 2233 implements OnClickListener { 2234 private static final int POPUP_TEXT_LAYOUT = 2235 com.android.internal.R.layout.text_edit_action_popup_text; 2236 private TextView mDeleteTextView; 2237 private EasyEditSpan mEasyEditSpan; 2238 private EasyEditDeleteListener mOnDeleteListener; 2239 2240 @Override 2241 protected void createPopupWindow() { 2242 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2243 com.android.internal.R.attr.textSelectHandleWindowStyle); 2244 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2245 mPopupWindow.setClippingEnabled(true); 2246 } 2247 2248 @Override 2249 protected void initContentView() { 2250 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2251 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2252 mContentView = linearLayout; 2253 mContentView.setBackgroundResource( 2254 com.android.internal.R.drawable.text_edit_side_paste_window); 2255 2256 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2257 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2258 2259 LayoutParams wrapContent = new LayoutParams( 2260 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2261 2262 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2263 mDeleteTextView.setLayoutParams(wrapContent); 2264 mDeleteTextView.setText(com.android.internal.R.string.delete); 2265 mDeleteTextView.setOnClickListener(this); 2266 mContentView.addView(mDeleteTextView); 2267 } 2268 2269 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2270 mEasyEditSpan = easyEditSpan; 2271 } 2272 2273 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2274 mOnDeleteListener = listener; 2275 } 2276 2277 @Override 2278 public void onClick(View view) { 2279 if (view == mDeleteTextView 2280 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2281 && mOnDeleteListener != null) { 2282 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2283 } 2284 } 2285 2286 @Override 2287 public void hide() { 2288 if (mEasyEditSpan != null) { 2289 mEasyEditSpan.setDeleteEnabled(false); 2290 } 2291 mOnDeleteListener = null; 2292 super.hide(); 2293 } 2294 2295 @Override 2296 protected int getTextOffset() { 2297 // Place the pop-up at the end of the span 2298 Editable editable = (Editable) mTextView.getText(); 2299 return editable.getSpanEnd(mEasyEditSpan); 2300 } 2301 2302 @Override 2303 protected int getVerticalLocalPosition(int line) { 2304 return mTextView.getLayout().getLineBottom(line); 2305 } 2306 2307 @Override 2308 protected int clipVertically(int positionY) { 2309 // As we display the pop-up below the span, no vertical clipping is required. 2310 return positionY; 2311 } 2312 } 2313 2314 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2315 // 3 handles 2316 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2317 // 1 CursorAnchorInfoNotifier 2318 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2319 private TextViewPositionListener[] mPositionListeners = 2320 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2321 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2322 private boolean mPositionHasChanged = true; 2323 // Absolute position of the TextView with respect to its parent window 2324 private int mPositionX, mPositionY; 2325 private int mNumberOfListeners; 2326 private boolean mScrollHasChanged; 2327 final int[] mTempCoords = new int[2]; 2328 2329 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2330 if (mNumberOfListeners == 0) { 2331 updatePosition(); 2332 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2333 vto.addOnPreDrawListener(this); 2334 } 2335 2336 int emptySlotIndex = -1; 2337 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2338 TextViewPositionListener listener = mPositionListeners[i]; 2339 if (listener == positionListener) { 2340 return; 2341 } else if (emptySlotIndex < 0 && listener == null) { 2342 emptySlotIndex = i; 2343 } 2344 } 2345 2346 mPositionListeners[emptySlotIndex] = positionListener; 2347 mCanMove[emptySlotIndex] = canMove; 2348 mNumberOfListeners++; 2349 } 2350 2351 public void removeSubscriber(TextViewPositionListener positionListener) { 2352 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2353 if (mPositionListeners[i] == positionListener) { 2354 mPositionListeners[i] = null; 2355 mNumberOfListeners--; 2356 break; 2357 } 2358 } 2359 2360 if (mNumberOfListeners == 0) { 2361 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2362 vto.removeOnPreDrawListener(this); 2363 } 2364 } 2365 2366 public int getPositionX() { 2367 return mPositionX; 2368 } 2369 2370 public int getPositionY() { 2371 return mPositionY; 2372 } 2373 2374 @Override 2375 public boolean onPreDraw() { 2376 updatePosition(); 2377 2378 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2379 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2380 TextViewPositionListener positionListener = mPositionListeners[i]; 2381 if (positionListener != null) { 2382 positionListener.updatePosition(mPositionX, mPositionY, 2383 mPositionHasChanged, mScrollHasChanged); 2384 } 2385 } 2386 } 2387 2388 mScrollHasChanged = false; 2389 return true; 2390 } 2391 2392 private void updatePosition() { 2393 mTextView.getLocationInWindow(mTempCoords); 2394 2395 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2396 2397 mPositionX = mTempCoords[0]; 2398 mPositionY = mTempCoords[1]; 2399 } 2400 2401 public void onScrollChanged() { 2402 mScrollHasChanged = true; 2403 } 2404 } 2405 2406 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2407 protected PopupWindow mPopupWindow; 2408 protected ViewGroup mContentView; 2409 int mPositionX, mPositionY; 2410 2411 protected abstract void createPopupWindow(); 2412 protected abstract void initContentView(); 2413 protected abstract int getTextOffset(); 2414 protected abstract int getVerticalLocalPosition(int line); 2415 protected abstract int clipVertically(int positionY); 2416 2417 public PinnedPopupWindow() { 2418 createPopupWindow(); 2419 2420 mPopupWindow.setWindowLayoutType( 2421 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2422 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2423 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2424 2425 initContentView(); 2426 2427 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2428 ViewGroup.LayoutParams.WRAP_CONTENT); 2429 mContentView.setLayoutParams(wrapContent); 2430 2431 mPopupWindow.setContentView(mContentView); 2432 } 2433 2434 public void show() { 2435 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2436 2437 computeLocalPosition(); 2438 2439 final PositionListener positionListener = getPositionListener(); 2440 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2441 } 2442 2443 protected void measureContent() { 2444 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2445 mContentView.measure( 2446 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2447 View.MeasureSpec.AT_MOST), 2448 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2449 View.MeasureSpec.AT_MOST)); 2450 } 2451 2452 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2453 * positioned according to viewportToContentHorizontalOffset. 2454 * 2455 * This method assumes that mContentView has properly been measured from its content. */ 2456 private void computeLocalPosition() { 2457 measureContent(); 2458 final int width = mContentView.getMeasuredWidth(); 2459 final int offset = getTextOffset(); 2460 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2461 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2462 2463 final int line = mTextView.getLayout().getLineForOffset(offset); 2464 mPositionY = getVerticalLocalPosition(line); 2465 mPositionY += mTextView.viewportToContentVerticalOffset(); 2466 } 2467 2468 private void updatePosition(int parentPositionX, int parentPositionY) { 2469 int positionX = parentPositionX + mPositionX; 2470 int positionY = parentPositionY + mPositionY; 2471 2472 positionY = clipVertically(positionY); 2473 2474 // Horizontal clipping 2475 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2476 final int width = mContentView.getMeasuredWidth(); 2477 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2478 positionX = Math.max(0, positionX); 2479 2480 if (isShowing()) { 2481 mPopupWindow.update(positionX, positionY, -1, -1); 2482 } else { 2483 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2484 positionX, positionY); 2485 } 2486 } 2487 2488 public void hide() { 2489 mPopupWindow.dismiss(); 2490 getPositionListener().removeSubscriber(this); 2491 } 2492 2493 @Override 2494 public void updatePosition(int parentPositionX, int parentPositionY, 2495 boolean parentPositionChanged, boolean parentScrolled) { 2496 // Either parentPositionChanged or parentScrolled is true, check if still visible 2497 if (isShowing() && isOffsetVisible(getTextOffset())) { 2498 if (parentScrolled) computeLocalPosition(); 2499 updatePosition(parentPositionX, parentPositionY); 2500 } else { 2501 hide(); 2502 } 2503 } 2504 2505 public boolean isShowing() { 2506 return mPopupWindow.isShowing(); 2507 } 2508 } 2509 2510 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2511 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2512 private static final int ADD_TO_DICTIONARY = -1; 2513 private static final int DELETE_TEXT = -2; 2514 private SuggestionInfo[] mSuggestionInfos; 2515 private int mNumberOfSuggestions; 2516 private boolean mCursorWasVisibleBeforeSuggestions; 2517 private boolean mIsShowingUp = false; 2518 private SuggestionAdapter mSuggestionsAdapter; 2519 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2520 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2521 2522 private class CustomPopupWindow extends PopupWindow { 2523 public CustomPopupWindow(Context context, int defStyleAttr) { 2524 super(context, null, defStyleAttr); 2525 } 2526 2527 @Override 2528 public void dismiss() { 2529 super.dismiss(); 2530 2531 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2532 2533 // Safe cast since show() checks that mTextView.getText() is an Editable 2534 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2535 2536 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2537 if (hasInsertionController()) { 2538 getInsertionController().show(); 2539 } 2540 } 2541 } 2542 2543 public SuggestionsPopupWindow() { 2544 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2545 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2546 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2547 } 2548 2549 @Override 2550 protected void createPopupWindow() { 2551 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2552 com.android.internal.R.attr.textSuggestionsWindowStyle); 2553 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2554 mPopupWindow.setFocusable(true); 2555 mPopupWindow.setClippingEnabled(false); 2556 } 2557 2558 @Override 2559 protected void initContentView() { 2560 ListView listView = new ListView(mTextView.getContext()); 2561 mSuggestionsAdapter = new SuggestionAdapter(); 2562 listView.setAdapter(mSuggestionsAdapter); 2563 listView.setOnItemClickListener(this); 2564 mContentView = listView; 2565 2566 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2567 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2568 for (int i = 0; i < mSuggestionInfos.length; i++) { 2569 mSuggestionInfos[i] = new SuggestionInfo(); 2570 } 2571 } 2572 2573 public boolean isShowingUp() { 2574 return mIsShowingUp; 2575 } 2576 2577 public void onParentLostFocus() { 2578 mIsShowingUp = false; 2579 } 2580 2581 private class SuggestionInfo { 2582 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2583 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2584 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2585 SpannableStringBuilder text = new SpannableStringBuilder(); 2586 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2587 android.R.style.TextAppearance_SuggestionHighlight); 2588 } 2589 2590 private class SuggestionAdapter extends BaseAdapter { 2591 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2592 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2593 2594 @Override 2595 public int getCount() { 2596 return mNumberOfSuggestions; 2597 } 2598 2599 @Override 2600 public Object getItem(int position) { 2601 return mSuggestionInfos[position]; 2602 } 2603 2604 @Override 2605 public long getItemId(int position) { 2606 return position; 2607 } 2608 2609 @Override 2610 public View getView(int position, View convertView, ViewGroup parent) { 2611 TextView textView = (TextView) convertView; 2612 2613 if (textView == null) { 2614 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2615 parent, false); 2616 } 2617 2618 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2619 textView.setText(suggestionInfo.text); 2620 2621 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2622 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2623 textView.setBackgroundColor(Color.TRANSPARENT); 2624 } else { 2625 textView.setBackgroundColor(Color.WHITE); 2626 } 2627 2628 return textView; 2629 } 2630 } 2631 2632 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2633 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2634 final int flag1 = span1.getFlags(); 2635 final int flag2 = span2.getFlags(); 2636 if (flag1 != flag2) { 2637 // The order here should match what is used in updateDrawState 2638 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2639 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2640 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2641 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2642 if (easy1 && !misspelled1) return -1; 2643 if (easy2 && !misspelled2) return 1; 2644 if (misspelled1) return -1; 2645 if (misspelled2) return 1; 2646 } 2647 2648 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2649 } 2650 } 2651 2652 /** 2653 * Returns the suggestion spans that cover the current cursor position. The suggestion 2654 * spans are sorted according to the length of text that they are attached to. 2655 */ 2656 private SuggestionSpan[] getSuggestionSpans() { 2657 int pos = mTextView.getSelectionStart(); 2658 Spannable spannable = (Spannable) mTextView.getText(); 2659 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2660 2661 mSpansLengths.clear(); 2662 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2663 int start = spannable.getSpanStart(suggestionSpan); 2664 int end = spannable.getSpanEnd(suggestionSpan); 2665 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2666 } 2667 2668 // The suggestions are sorted according to their types (easy correction first, then 2669 // misspelled) and to the length of the text that they cover (shorter first). 2670 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2671 return suggestionSpans; 2672 } 2673 2674 @Override 2675 public void show() { 2676 if (!(mTextView.getText() instanceof Editable)) return; 2677 2678 if (updateSuggestions()) { 2679 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2680 mTextView.setCursorVisible(false); 2681 mIsShowingUp = true; 2682 super.show(); 2683 } 2684 } 2685 2686 @Override 2687 protected void measureContent() { 2688 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2689 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2690 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2691 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2692 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2693 2694 int width = 0; 2695 View view = null; 2696 for (int i = 0; i < mNumberOfSuggestions; i++) { 2697 view = mSuggestionsAdapter.getView(i, view, mContentView); 2698 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2699 view.measure(horizontalMeasure, verticalMeasure); 2700 width = Math.max(width, view.getMeasuredWidth()); 2701 } 2702 2703 // Enforce the width based on actual text widths 2704 mContentView.measure( 2705 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2706 verticalMeasure); 2707 2708 Drawable popupBackground = mPopupWindow.getBackground(); 2709 if (popupBackground != null) { 2710 if (mTempRect == null) mTempRect = new Rect(); 2711 popupBackground.getPadding(mTempRect); 2712 width += mTempRect.left + mTempRect.right; 2713 } 2714 mPopupWindow.setWidth(width); 2715 } 2716 2717 @Override 2718 protected int getTextOffset() { 2719 return mTextView.getSelectionStart(); 2720 } 2721 2722 @Override 2723 protected int getVerticalLocalPosition(int line) { 2724 return mTextView.getLayout().getLineBottom(line); 2725 } 2726 2727 @Override 2728 protected int clipVertically(int positionY) { 2729 final int height = mContentView.getMeasuredHeight(); 2730 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2731 return Math.min(positionY, displayMetrics.heightPixels - height); 2732 } 2733 2734 @Override 2735 public void hide() { 2736 super.hide(); 2737 } 2738 2739 private boolean updateSuggestions() { 2740 Spannable spannable = (Spannable) mTextView.getText(); 2741 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2742 2743 final int nbSpans = suggestionSpans.length; 2744 // Suggestions are shown after a delay: the underlying spans may have been removed 2745 if (nbSpans == 0) return false; 2746 2747 mNumberOfSuggestions = 0; 2748 int spanUnionStart = mTextView.getText().length(); 2749 int spanUnionEnd = 0; 2750 2751 SuggestionSpan misspelledSpan = null; 2752 int underlineColor = 0; 2753 2754 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2755 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2756 final int spanStart = spannable.getSpanStart(suggestionSpan); 2757 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2758 spanUnionStart = Math.min(spanStart, spanUnionStart); 2759 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2760 2761 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2762 misspelledSpan = suggestionSpan; 2763 } 2764 2765 // The first span dictates the background color of the highlighted text 2766 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2767 2768 String[] suggestions = suggestionSpan.getSuggestions(); 2769 int nbSuggestions = suggestions.length; 2770 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2771 String suggestion = suggestions[suggestionIndex]; 2772 2773 boolean suggestionIsDuplicate = false; 2774 for (int i = 0; i < mNumberOfSuggestions; i++) { 2775 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2776 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2777 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2778 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2779 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2780 suggestionIsDuplicate = true; 2781 break; 2782 } 2783 } 2784 } 2785 2786 if (!suggestionIsDuplicate) { 2787 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2788 suggestionInfo.suggestionSpan = suggestionSpan; 2789 suggestionInfo.suggestionIndex = suggestionIndex; 2790 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2791 2792 mNumberOfSuggestions++; 2793 2794 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2795 // Also end outer for loop 2796 spanIndex = nbSpans; 2797 break; 2798 } 2799 } 2800 } 2801 } 2802 2803 for (int i = 0; i < mNumberOfSuggestions; i++) { 2804 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2805 } 2806 2807 // Add "Add to dictionary" item if there is a span with the misspelled flag 2808 if (misspelledSpan != null) { 2809 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2810 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2811 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2812 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2813 suggestionInfo.suggestionSpan = misspelledSpan; 2814 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2815 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2816 getContext().getString(com.android.internal.R.string.addToDictionary)); 2817 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2818 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2819 2820 mNumberOfSuggestions++; 2821 } 2822 } 2823 2824 // Delete item 2825 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2826 suggestionInfo.suggestionSpan = null; 2827 suggestionInfo.suggestionIndex = DELETE_TEXT; 2828 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2829 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2830 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2831 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2832 mNumberOfSuggestions++; 2833 2834 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2835 if (underlineColor == 0) { 2836 // Fallback on the default highlight color when the first span does not provide one 2837 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2838 } else { 2839 final float BACKGROUND_TRANSPARENCY = 0.4f; 2840 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2841 mSuggestionRangeSpan.setBackgroundColor( 2842 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2843 } 2844 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2845 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2846 2847 mSuggestionsAdapter.notifyDataSetChanged(); 2848 return true; 2849 } 2850 2851 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2852 int unionEnd) { 2853 final Spannable text = (Spannable) mTextView.getText(); 2854 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2855 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2856 2857 // Adjust the start/end of the suggestion span 2858 suggestionInfo.suggestionStart = spanStart - unionStart; 2859 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2860 + suggestionInfo.text.length(); 2861 2862 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2863 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2864 2865 // Add the text before and after the span. 2866 final String textAsString = text.toString(); 2867 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2868 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2869 } 2870 2871 @Override 2872 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2873 Editable editable = (Editable) mTextView.getText(); 2874 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2875 2876 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2877 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2878 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2879 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2880 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2881 if (spanUnionEnd < editable.length() && 2882 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2883 (spanUnionStart == 0 || 2884 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2885 spanUnionEnd = spanUnionEnd + 1; 2886 } 2887 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2888 } 2889 hide(); 2890 return; 2891 } 2892 2893 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2894 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2895 if (spanStart < 0 || spanEnd <= spanStart) { 2896 // Span has been removed 2897 hide(); 2898 return; 2899 } 2900 2901 final String originalText = editable.toString().substring(spanStart, spanEnd); 2902 2903 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2904 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2905 intent.putExtra("word", originalText); 2906 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2907 // Put a listener to replace the original text with a word which the user 2908 // modified in a user dictionary dialog. 2909 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2910 mTextView.getContext().startActivity(intent); 2911 // There is no way to know if the word was indeed added. Re-check. 2912 // TODO The ExtractEditText should remove the span in the original text instead 2913 editable.removeSpan(suggestionInfo.suggestionSpan); 2914 Selection.setSelection(editable, spanEnd); 2915 updateSpellCheckSpans(spanStart, spanEnd, false); 2916 } else { 2917 // SuggestionSpans are removed by replace: save them before 2918 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2919 SuggestionSpan.class); 2920 final int length = suggestionSpans.length; 2921 int[] suggestionSpansStarts = new int[length]; 2922 int[] suggestionSpansEnds = new int[length]; 2923 int[] suggestionSpansFlags = new int[length]; 2924 for (int i = 0; i < length; i++) { 2925 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2926 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2927 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2928 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2929 2930 // Remove potential misspelled flags 2931 int suggestionSpanFlags = suggestionSpan.getFlags(); 2932 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2933 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2934 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2935 suggestionSpan.setFlags(suggestionSpanFlags); 2936 } 2937 } 2938 2939 final int suggestionStart = suggestionInfo.suggestionStart; 2940 final int suggestionEnd = suggestionInfo.suggestionEnd; 2941 final String suggestion = suggestionInfo.text.subSequence( 2942 suggestionStart, suggestionEnd).toString(); 2943 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2944 2945 // Notify source IME of the suggestion pick. Do this before 2946 // swaping texts. 2947 suggestionInfo.suggestionSpan.notifySelection( 2948 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 2949 2950 // Swap text content between actual text and Suggestion span 2951 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 2952 suggestions[suggestionInfo.suggestionIndex] = originalText; 2953 2954 // Restore previous SuggestionSpans 2955 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 2956 for (int i = 0; i < length; i++) { 2957 // Only spans that include the modified region make sense after replacement 2958 // Spans partially included in the replaced region are removed, there is no 2959 // way to assign them a valid range after replacement 2960 if (suggestionSpansStarts[i] <= spanStart && 2961 suggestionSpansEnds[i] >= spanEnd) { 2962 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2963 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 2964 } 2965 } 2966 2967 // Move cursor at the end of the replaced word 2968 final int newCursorPosition = spanEnd + lengthDifference; 2969 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2970 } 2971 2972 hide(); 2973 } 2974 } 2975 2976 /** 2977 * An ActionMode Callback class that is used to provide actions while in text selection mode. 2978 * 2979 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 2980 * on which of these this TextView supports. 2981 */ 2982 private class SelectionActionModeCallback extends ActionMode.Callback2 { 2983 private final Path mSelectionPath = new Path(); 2984 private final RectF mSelectionBounds = new RectF(); 2985 2986 private int mSelectionHandleHeight; 2987 private int mInsertionHandleHeight; 2988 2989 public SelectionActionModeCallback() { 2990 SelectionModifierCursorController selectionController = getSelectionController(); 2991 if (selectionController.mStartHandle == null) { 2992 // As these are for initializing selectionController, hide() must be called. 2993 selectionController.initDrawables(); 2994 selectionController.initHandles(); 2995 selectionController.hide(); 2996 } 2997 mSelectionHandleHeight = Math.max( 2998 mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight()); 2999 InsertionPointCursorController insertionController = getInsertionController(); 3000 if (insertionController != null) { 3001 insertionController.getHandle(); 3002 mInsertionHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3003 } 3004 } 3005 3006 @Override 3007 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3008 mode.setTitle(mTextView.getContext().getString( 3009 com.android.internal.R.string.textSelectionCABTitle)); 3010 mode.setSubtitle(null); 3011 mode.setTitleOptionalHint(true); 3012 populateMenuWithItems(menu); 3013 3014 if (mCustomSelectionActionModeCallback != null) { 3015 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 3016 // The custom mode can choose to cancel the action mode 3017 return false; 3018 } 3019 } 3020 3021 addIntentMenuItemsForTextProcessing(menu); 3022 3023 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3024 mTextView.setHasTransientState(true); 3025 return true; 3026 } else { 3027 return false; 3028 } 3029 } 3030 3031 private void populateMenuWithItems(Menu menu) { 3032 if (mTextView.canCut()) { 3033 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 3034 setAlphabeticShortcut('x'). 3035 setShowAsAction( 3036 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3037 } 3038 3039 if (mTextView.canCopy()) { 3040 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 3041 setAlphabeticShortcut('c'). 3042 setShowAsAction( 3043 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3044 } 3045 3046 if (mTextView.canPaste()) { 3047 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 3048 setAlphabeticShortcut('v'). 3049 setShowAsAction( 3050 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3051 } 3052 3053 if (mTextView.canShare()) { 3054 menu.add(0, TextView.ID_SHARE, 0, com.android.internal.R.string.share). 3055 setShowAsAction( 3056 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3057 } 3058 3059 if (mTextView.canSelectAllText()) { 3060 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 3061 setAlphabeticShortcut('a'). 3062 setShowAsAction( 3063 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3064 } 3065 3066 updateReplaceItem(menu); 3067 } 3068 3069 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3070 if (mTextView.canProcessText()) { 3071 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3072 List<ResolveInfo> supportedActivities = 3073 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3074 for (ResolveInfo info : supportedActivities) { 3075 menu.add(info.loadLabel(packageManager)) 3076 .setIntent(createProcessTextIntentForResolveInfo(info)) 3077 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM 3078 | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3079 } 3080 } 3081 } 3082 3083 private Intent createProcessTextIntent() { 3084 return new Intent() 3085 .setAction(Intent.ACTION_PROCESS_TEXT) 3086 .setType("text/plain"); 3087 } 3088 3089 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3090 return createProcessTextIntent() 3091 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3092 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3093 } 3094 3095 @Override 3096 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3097 updateReplaceItem(menu); 3098 3099 if (mCustomSelectionActionModeCallback != null) { 3100 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3101 } 3102 return true; 3103 } 3104 3105 private void updateReplaceItem(Menu menu) { 3106 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3107 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3108 if (canReplace && !replaceItemExists) { 3109 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 3110 setShowAsAction( 3111 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3112 } else if (!canReplace && replaceItemExists) { 3113 menu.removeItem(TextView.ID_REPLACE); 3114 } 3115 } 3116 3117 @Override 3118 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3119 if (item.getIntent() != null 3120 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3121 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3122 mPreserveDetachedSelection = true; 3123 mTextView.startActivityForResult( 3124 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3125 return true; 3126 } 3127 if (mCustomSelectionActionModeCallback != null && 3128 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3129 return true; 3130 } 3131 if (item.getItemId() == TextView.ID_REPLACE) { 3132 onReplace(); 3133 return true; 3134 } 3135 return mTextView.onTextContextMenuItem(item.getItemId()); 3136 } 3137 3138 @Override 3139 public void onDestroyActionMode(ActionMode mode) { 3140 if (mCustomSelectionActionModeCallback != null) { 3141 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3142 } 3143 3144 /* 3145 * If we're ending this mode because we're detaching from a window, 3146 * we still have selection state to preserve. Don't clear it, we'll 3147 * bring back the selection mode when (if) we get reattached. 3148 */ 3149 if (!mPreserveDetachedSelection) { 3150 Selection.setSelection((Spannable) mTextView.getText(), 3151 mTextView.getSelectionEnd()); 3152 mTextView.setHasTransientState(false); 3153 } 3154 3155 if (mSelectionModifierCursorController != null) { 3156 mSelectionModifierCursorController.hide(); 3157 } 3158 3159 mSelectionActionMode = null; 3160 } 3161 3162 @Override 3163 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3164 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3165 super.onGetContentRect(mode, view, outRect); 3166 return; 3167 } 3168 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3169 // We have a selection. 3170 mSelectionPath.reset(); 3171 mTextView.getLayout().getSelectionPath( 3172 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3173 mSelectionPath.computeBounds(mSelectionBounds, true); 3174 mSelectionBounds.bottom += mSelectionHandleHeight; 3175 } else if (mCursorCount == 2) { 3176 // We have a split cursor. In this case, we take the rectangle that includes both 3177 // parts of the cursor to ensure we don't obscure either of them. 3178 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3179 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3180 mSelectionBounds.set( 3181 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3182 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3183 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3184 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3185 + mInsertionHandleHeight); 3186 } else { 3187 // We have a single cursor. 3188 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3189 float primaryHorizontal = 3190 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3191 mSelectionBounds.set( 3192 primaryHorizontal, 3193 mTextView.getLayout().getLineTop(line), 3194 primaryHorizontal + 1, 3195 mTextView.getLayout().getLineTop(line + 1) + mInsertionHandleHeight); 3196 } 3197 // Take TextView's padding and scroll into account. 3198 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3199 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3200 outRect.set( 3201 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3202 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3203 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3204 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3205 } 3206 } 3207 3208 private void onReplace() { 3209 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3210 stopSelectionActionMode(); 3211 Selection.setSelection((Spannable) mTextView.getText(), middle); 3212 showSuggestions(); 3213 } 3214 3215 /** 3216 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3217 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3218 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3219 */ 3220 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3221 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3222 final int[] mTmpIntOffset = new int[2]; 3223 final Matrix mViewToScreenMatrix = new Matrix(); 3224 3225 @Override 3226 public void updatePosition(int parentPositionX, int parentPositionY, 3227 boolean parentPositionChanged, boolean parentScrolled) { 3228 final InputMethodState ims = mInputMethodState; 3229 if (ims == null || ims.mBatchEditNesting > 0) { 3230 return; 3231 } 3232 final InputMethodManager imm = InputMethodManager.peekInstance(); 3233 if (null == imm) { 3234 return; 3235 } 3236 if (!imm.isActive(mTextView)) { 3237 return; 3238 } 3239 // Skip if the IME has not requested the cursor/anchor position. 3240 if (!imm.isCursorAnchorInfoEnabled()) { 3241 return; 3242 } 3243 Layout layout = mTextView.getLayout(); 3244 if (layout == null) { 3245 return; 3246 } 3247 3248 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3249 builder.reset(); 3250 3251 final int selectionStart = mTextView.getSelectionStart(); 3252 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3253 3254 // Construct transformation matrix from view local coordinates to screen coordinates. 3255 mViewToScreenMatrix.set(mTextView.getMatrix()); 3256 mTextView.getLocationOnScreen(mTmpIntOffset); 3257 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3258 builder.setMatrix(mViewToScreenMatrix); 3259 3260 final float viewportToContentHorizontalOffset = 3261 mTextView.viewportToContentHorizontalOffset(); 3262 final float viewportToContentVerticalOffset = 3263 mTextView.viewportToContentVerticalOffset(); 3264 3265 final CharSequence text = mTextView.getText(); 3266 if (text instanceof Spannable) { 3267 final Spannable sp = (Spannable) text; 3268 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3269 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3270 if (composingTextEnd < composingTextStart) { 3271 final int temp = composingTextEnd; 3272 composingTextEnd = composingTextStart; 3273 composingTextStart = temp; 3274 } 3275 final boolean hasComposingText = 3276 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3277 if (hasComposingText) { 3278 final CharSequence composingText = text.subSequence(composingTextStart, 3279 composingTextEnd); 3280 builder.setComposingText(composingTextStart, composingText); 3281 3282 final int minLine = layout.getLineForOffset(composingTextStart); 3283 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3284 for (int line = minLine; line <= maxLine; ++line) { 3285 final int lineStart = layout.getLineStart(line); 3286 final int lineEnd = layout.getLineEnd(line); 3287 final int offsetStart = Math.max(lineStart, composingTextStart); 3288 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3289 final boolean ltrLine = 3290 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3291 final float[] widths = new float[offsetEnd - offsetStart]; 3292 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3293 final float top = layout.getLineTop(line); 3294 final float bottom = layout.getLineBottom(line); 3295 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3296 final float charWidth = widths[offset - offsetStart]; 3297 final boolean isRtl = layout.isRtlCharAt(offset); 3298 final float primary = layout.getPrimaryHorizontal(offset); 3299 final float secondary = layout.getSecondaryHorizontal(offset); 3300 // TODO: This doesn't work perfectly for text with custom styles and 3301 // TAB chars. 3302 final float left; 3303 final float right; 3304 if (ltrLine) { 3305 if (isRtl) { 3306 left = secondary - charWidth; 3307 right = secondary; 3308 } else { 3309 left = primary; 3310 right = primary + charWidth; 3311 } 3312 } else { 3313 if (!isRtl) { 3314 left = secondary; 3315 right = secondary + charWidth; 3316 } else { 3317 left = primary - charWidth; 3318 right = primary; 3319 } 3320 } 3321 // TODO: Check top-right and bottom-left as well. 3322 final float localLeft = left + viewportToContentHorizontalOffset; 3323 final float localRight = right + viewportToContentHorizontalOffset; 3324 final float localTop = top + viewportToContentVerticalOffset; 3325 final float localBottom = bottom + viewportToContentVerticalOffset; 3326 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3327 final boolean isBottomRightVisible = 3328 isPositionVisible(localRight, localBottom); 3329 int characterBoundsFlags = 0; 3330 if (isTopLeftVisible || isBottomRightVisible) { 3331 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3332 } 3333 if (!isTopLeftVisible || !isBottomRightVisible) { 3334 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3335 } 3336 if (isRtl) { 3337 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3338 } 3339 // Here offset is the index in Java chars. 3340 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3341 localBottom, characterBoundsFlags); 3342 } 3343 } 3344 } 3345 } 3346 3347 // Treat selectionStart as the insertion point. 3348 if (0 <= selectionStart) { 3349 final int offset = selectionStart; 3350 final int line = layout.getLineForOffset(offset); 3351 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3352 + viewportToContentHorizontalOffset; 3353 final float insertionMarkerTop = layout.getLineTop(line) 3354 + viewportToContentVerticalOffset; 3355 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3356 + viewportToContentVerticalOffset; 3357 final float insertionMarkerBottom = layout.getLineBottom(line) 3358 + viewportToContentVerticalOffset; 3359 final boolean isTopVisible = 3360 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3361 final boolean isBottomVisible = 3362 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3363 int insertionMarkerFlags = 0; 3364 if (isTopVisible || isBottomVisible) { 3365 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3366 } 3367 if (!isTopVisible || !isBottomVisible) { 3368 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3369 } 3370 if (layout.isRtlCharAt(offset)) { 3371 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3372 } 3373 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3374 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3375 } 3376 3377 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3378 } 3379 } 3380 3381 private abstract class HandleView extends View implements TextViewPositionListener { 3382 protected Drawable mDrawable; 3383 protected Drawable mDrawableLtr; 3384 protected Drawable mDrawableRtl; 3385 private final PopupWindow mContainer; 3386 // Position with respect to the parent TextView 3387 private int mPositionX, mPositionY; 3388 private boolean mIsDragging; 3389 // Offset from touch position to mPosition 3390 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3391 protected int mHotspotX; 3392 protected int mHorizontalGravity; 3393 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3394 private float mTouchOffsetY; 3395 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3396 private float mIdealVerticalOffset; 3397 // Parent's (TextView) previous position in window 3398 private int mLastParentX, mLastParentY; 3399 // Previous text character offset 3400 protected int mPreviousOffset = -1; 3401 // Previous text character offset 3402 private boolean mPositionHasChanged = true; 3403 // Minimum touch target size for handles 3404 private int mMinSize; 3405 // Indicates the line of text that the handle is on. 3406 protected int mPrevLine = -1; 3407 3408 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3409 super(mTextView.getContext()); 3410 mContainer = new PopupWindow(mTextView.getContext(), null, 3411 com.android.internal.R.attr.textSelectHandleWindowStyle); 3412 mContainer.setSplitTouchEnabled(true); 3413 mContainer.setClippingEnabled(false); 3414 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3415 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3416 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3417 mContainer.setContentView(this); 3418 3419 mDrawableLtr = drawableLtr; 3420 mDrawableRtl = drawableRtl; 3421 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3422 com.android.internal.R.dimen.text_handle_min_size); 3423 3424 updateDrawable(); 3425 3426 final int handleHeight = getPreferredHeight(); 3427 mTouchOffsetY = -0.3f * handleHeight; 3428 mIdealVerticalOffset = 0.7f * handleHeight; 3429 } 3430 3431 protected void updateDrawable() { 3432 final int offset = getCurrentCursorOffset(); 3433 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3434 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3435 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3436 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3437 } 3438 3439 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3440 protected abstract int getHorizontalGravity(boolean isRtlRun); 3441 3442 // Touch-up filter: number of previous positions remembered 3443 private static final int HISTORY_SIZE = 5; 3444 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3445 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3446 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3447 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3448 private int mPreviousOffsetIndex = 0; 3449 private int mNumberPreviousOffsets = 0; 3450 3451 private void startTouchUpFilter(int offset) { 3452 mNumberPreviousOffsets = 0; 3453 addPositionToTouchUpFilter(offset); 3454 } 3455 3456 private void addPositionToTouchUpFilter(int offset) { 3457 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3458 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3459 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3460 mNumberPreviousOffsets++; 3461 } 3462 3463 private void filterOnTouchUp() { 3464 final long now = SystemClock.uptimeMillis(); 3465 int i = 0; 3466 int index = mPreviousOffsetIndex; 3467 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3468 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3469 i++; 3470 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3471 } 3472 3473 if (i > 0 && i < iMax && 3474 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3475 positionAtCursorOffset(mPreviousOffsets[index], false); 3476 } 3477 } 3478 3479 public boolean offsetHasBeenChanged() { 3480 return mNumberPreviousOffsets > 1; 3481 } 3482 3483 @Override 3484 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3485 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3486 } 3487 3488 private int getPreferredWidth() { 3489 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3490 } 3491 3492 private int getPreferredHeight() { 3493 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3494 } 3495 3496 public void show() { 3497 if (isShowing()) return; 3498 3499 getPositionListener().addSubscriber(this, true /* local position may change */); 3500 3501 // Make sure the offset is always considered new, even when focusing at same position 3502 mPreviousOffset = -1; 3503 positionAtCursorOffset(getCurrentCursorOffset(), false); 3504 } 3505 3506 protected void dismiss() { 3507 mIsDragging = false; 3508 mContainer.dismiss(); 3509 onDetached(); 3510 } 3511 3512 public void hide() { 3513 dismiss(); 3514 3515 getPositionListener().removeSubscriber(this); 3516 } 3517 3518 public boolean isShowing() { 3519 return mContainer.isShowing(); 3520 } 3521 3522 private boolean isVisible() { 3523 // Always show a dragging handle. 3524 if (mIsDragging) { 3525 return true; 3526 } 3527 3528 if (mTextView.isInBatchEditMode()) { 3529 return false; 3530 } 3531 3532 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3533 } 3534 3535 public abstract int getCurrentCursorOffset(); 3536 3537 protected abstract void updateSelection(int offset); 3538 3539 public abstract void updatePosition(float x, float y); 3540 3541 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3542 // A HandleView relies on the layout, which may be nulled by external methods 3543 Layout layout = mTextView.getLayout(); 3544 if (layout == null) { 3545 // Will update controllers' state, hiding them and stopping selection mode if needed 3546 prepareCursorControllers(); 3547 return; 3548 } 3549 3550 boolean offsetChanged = offset != mPreviousOffset; 3551 if (offsetChanged || parentScrolled) { 3552 if (offsetChanged) { 3553 updateSelection(offset); 3554 addPositionToTouchUpFilter(offset); 3555 } 3556 final int line = layout.getLineForOffset(offset); 3557 mPrevLine = line; 3558 3559 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3560 getHorizontalOffset() + getCursorOffset()); 3561 mPositionY = layout.getLineBottom(line); 3562 3563 // Take TextView's padding and scroll into account. 3564 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3565 mPositionY += mTextView.viewportToContentVerticalOffset(); 3566 3567 mPreviousOffset = offset; 3568 mPositionHasChanged = true; 3569 } 3570 } 3571 3572 public void updatePosition(int parentPositionX, int parentPositionY, 3573 boolean parentPositionChanged, boolean parentScrolled) { 3574 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3575 if (parentPositionChanged || mPositionHasChanged) { 3576 if (mIsDragging) { 3577 // Update touchToWindow offset in case of parent scrolling while dragging 3578 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3579 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3580 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3581 mLastParentX = parentPositionX; 3582 mLastParentY = parentPositionY; 3583 } 3584 3585 onHandleMoved(); 3586 } 3587 3588 if (isVisible()) { 3589 final int positionX = parentPositionX + mPositionX; 3590 final int positionY = parentPositionY + mPositionY; 3591 if (isShowing()) { 3592 mContainer.update(positionX, positionY, -1, -1); 3593 } else { 3594 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3595 positionX, positionY); 3596 } 3597 } else { 3598 if (isShowing()) { 3599 dismiss(); 3600 } 3601 } 3602 3603 mPositionHasChanged = false; 3604 } 3605 } 3606 3607 public void showAtLocation(int offset) { 3608 // TODO - investigate if there's a better way to show the handles 3609 // after the drag accelerator has occured. 3610 int[] tmpCords = new int[2]; 3611 mTextView.getLocationInWindow(tmpCords); 3612 3613 Layout layout = mTextView.getLayout(); 3614 int posX = tmpCords[0]; 3615 int posY = tmpCords[1]; 3616 3617 final int line = layout.getLineForOffset(offset); 3618 3619 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3620 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3621 int startY = layout.getLineBottom(line); 3622 3623 // Take TextView's padding and scroll into account. 3624 startX += mTextView.viewportToContentHorizontalOffset(); 3625 startY += mTextView.viewportToContentVerticalOffset(); 3626 3627 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3628 startX + posX, startY + posY); 3629 } 3630 3631 @Override 3632 protected void onDraw(Canvas c) { 3633 final int drawWidth = mDrawable.getIntrinsicWidth(); 3634 final int left = getHorizontalOffset(); 3635 3636 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3637 mDrawable.draw(c); 3638 } 3639 3640 private int getHorizontalOffset() { 3641 final int width = getPreferredWidth(); 3642 final int drawWidth = mDrawable.getIntrinsicWidth(); 3643 final int left; 3644 switch (mHorizontalGravity) { 3645 case Gravity.LEFT: 3646 left = 0; 3647 break; 3648 default: 3649 case Gravity.CENTER: 3650 left = (width - drawWidth) / 2; 3651 break; 3652 case Gravity.RIGHT: 3653 left = width - drawWidth; 3654 break; 3655 } 3656 return left; 3657 } 3658 3659 protected int getCursorOffset() { 3660 return 0; 3661 } 3662 3663 @Override 3664 public boolean onTouchEvent(MotionEvent ev) { 3665 switch (ev.getActionMasked()) { 3666 case MotionEvent.ACTION_DOWN: { 3667 startTouchUpFilter(getCurrentCursorOffset()); 3668 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3669 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3670 3671 final PositionListener positionListener = getPositionListener(); 3672 mLastParentX = positionListener.getPositionX(); 3673 mLastParentY = positionListener.getPositionY(); 3674 mIsDragging = true; 3675 break; 3676 } 3677 3678 case MotionEvent.ACTION_MOVE: { 3679 final float rawX = ev.getRawX(); 3680 final float rawY = ev.getRawY(); 3681 3682 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3683 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3684 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3685 float newVerticalOffset; 3686 if (previousVerticalOffset < mIdealVerticalOffset) { 3687 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3688 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3689 } else { 3690 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3691 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3692 } 3693 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3694 3695 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3696 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3697 3698 updatePosition(newPosX, newPosY); 3699 break; 3700 } 3701 3702 case MotionEvent.ACTION_UP: 3703 filterOnTouchUp(); 3704 mIsDragging = false; 3705 break; 3706 3707 case MotionEvent.ACTION_CANCEL: 3708 mIsDragging = false; 3709 break; 3710 } 3711 return true; 3712 } 3713 3714 public boolean isDragging() { 3715 return mIsDragging; 3716 } 3717 3718 void onHandleMoved() {} 3719 3720 public void onDetached() {} 3721 } 3722 3723 private class InsertionHandleView extends HandleView { 3724 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3725 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3726 3727 // Used to detect taps on the insertion handle, which will affect the selection action mode 3728 private float mDownPositionX, mDownPositionY; 3729 private Runnable mHider; 3730 3731 public InsertionHandleView(Drawable drawable) { 3732 super(drawable, drawable); 3733 } 3734 3735 @Override 3736 public void show() { 3737 super.show(); 3738 3739 final long durationSinceCutOrCopy = 3740 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3741 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3742 startSelectionActionModeWithoutSelection(); 3743 } 3744 3745 hideAfterDelay(); 3746 } 3747 3748 private void hideAfterDelay() { 3749 if (mHider == null) { 3750 mHider = new Runnable() { 3751 public void run() { 3752 hide(); 3753 } 3754 }; 3755 } else { 3756 removeHiderCallback(); 3757 } 3758 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3759 } 3760 3761 private void removeHiderCallback() { 3762 if (mHider != null) { 3763 mTextView.removeCallbacks(mHider); 3764 } 3765 } 3766 3767 @Override 3768 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3769 return drawable.getIntrinsicWidth() / 2; 3770 } 3771 3772 @Override 3773 protected int getHorizontalGravity(boolean isRtlRun) { 3774 return Gravity.CENTER_HORIZONTAL; 3775 } 3776 3777 @Override 3778 protected int getCursorOffset() { 3779 int offset = super.getCursorOffset(); 3780 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3781 if (cursor != null) { 3782 cursor.getPadding(mTempRect); 3783 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3784 } 3785 return offset; 3786 } 3787 3788 @Override 3789 public boolean onTouchEvent(MotionEvent ev) { 3790 final boolean result = super.onTouchEvent(ev); 3791 3792 switch (ev.getActionMasked()) { 3793 case MotionEvent.ACTION_DOWN: 3794 mDownPositionX = ev.getRawX(); 3795 mDownPositionY = ev.getRawY(); 3796 break; 3797 3798 case MotionEvent.ACTION_UP: 3799 if (!offsetHasBeenChanged()) { 3800 final float deltaX = mDownPositionX - ev.getRawX(); 3801 final float deltaY = mDownPositionY - ev.getRawY(); 3802 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3803 3804 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3805 mTextView.getContext()); 3806 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3807 3808 if (distanceSquared < touchSlop * touchSlop) { 3809 // Tapping on the handle toggles the selection action mode. 3810 if (mSelectionActionMode != null) { 3811 mSelectionActionMode.finish(); 3812 } else { 3813 startSelectionActionModeWithoutSelection(); 3814 } 3815 } 3816 } else { 3817 if (mSelectionActionMode != null) { 3818 mSelectionActionMode.invalidateContentRect(); 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 boolean positionCursor = false; 3903 int offset = trueOffset; 3904 int end = getWordEnd(offset, true); 3905 int start = getWordStart(offset); 3906 3907 if (offset < mPreviousOffset) { 3908 // User is increasing the selection. 3909 if (!mInWord || currLine < mPrevLine) { 3910 // We're not in a word, or we're on a different line so we'll expand by 3911 // word. First ensure the user has at least entered the next word. 3912 int offsetToWord = Math.min((end - start) / 2, 2); 3913 if (offset <= end - offsetToWord || currLine < mPrevLine) { 3914 offset = start; 3915 } else { 3916 offset = mPreviousOffset; 3917 } 3918 } 3919 mTouchWordOffset = Math.max(trueOffset - offset, 0); 3920 mInWord = !isStartBoundary(offset); 3921 positionCursor = true; 3922 } else if (offset - mTouchWordOffset > mPreviousOffset) { 3923 // User is shrinking the selection. 3924 if (currLine > mPrevLine) { 3925 // We're on a different line, so we'll snap to word boundaries. 3926 offset = end; 3927 } 3928 offset -= mTouchWordOffset; 3929 mInWord = !isEndBoundary(offset); 3930 positionCursor = true; 3931 } 3932 3933 // Handles can not cross and selection is at least one character. 3934 if (positionCursor) { 3935 final int selectionEnd = mTextView.getSelectionEnd(); 3936 if (offset >= selectionEnd) { 3937 // We can't cross the handles so let's just constrain the Y value. 3938 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 3939 if (alteredOffset >= selectionEnd) { 3940 // Can't pass the other drag handle. 3941 offset = getNextCursorOffset(selectionEnd, false); 3942 } else { 3943 offset = alteredOffset; 3944 } 3945 } 3946 positionAtCursorOffset(offset, false); 3947 } 3948 } 3949 3950 @Override 3951 public boolean onTouchEvent(MotionEvent event) { 3952 boolean superResult = super.onTouchEvent(event); 3953 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 3954 // Reset the touch word offset when the user has lifted their finger. 3955 mTouchWordOffset = 0; 3956 } 3957 return superResult; 3958 } 3959 } 3960 3961 private class SelectionEndHandleView extends HandleView { 3962 // Indicates whether the cursor is making adjustments within a word. 3963 private boolean mInWord = false; 3964 // Offset to track difference between touch and word boundary. 3965 protected int mTouchWordOffset; 3966 3967 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3968 super(drawableLtr, drawableRtl); 3969 } 3970 3971 @Override 3972 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3973 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 3974 } 3975 3976 @Override 3977 protected int getHorizontalGravity(boolean isRtlRun) { 3978 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 3979 } 3980 3981 @Override 3982 public int getCurrentCursorOffset() { 3983 return mTextView.getSelectionEnd(); 3984 } 3985 3986 @Override 3987 public void updateSelection(int offset) { 3988 Selection.setSelection((Spannable) mTextView.getText(), 3989 mTextView.getSelectionStart(), offset); 3990 if (mSelectionActionMode != null) { 3991 mSelectionActionMode.invalidate(); 3992 } 3993 updateDrawable(); 3994 } 3995 3996 @Override 3997 public void updatePosition(float x, float y) { 3998 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3999 final int currLine = mTextView.getLineAtCoordinate(y); 4000 int offset = trueOffset; 4001 boolean positionCursor = false; 4002 4003 int end = getWordEnd(offset, true); 4004 int start = getWordStart(offset); 4005 4006 if (offset > mPreviousOffset) { 4007 // User is increasing the selection. 4008 if (!mInWord || currLine > mPrevLine) { 4009 // We're not in a word, or we're on a different line so we'll expand by 4010 // word. First ensure the user has at least entered the next word. 4011 int midPoint = Math.min((end - start) / 2, 2); 4012 if (offset >= start + midPoint || currLine > mPrevLine) { 4013 offset = end; 4014 } else { 4015 offset = mPreviousOffset; 4016 } 4017 } 4018 mTouchWordOffset = Math.max(offset - trueOffset, 0); 4019 mInWord = !isEndBoundary(offset); 4020 positionCursor = true; 4021 } else if (offset + mTouchWordOffset < mPreviousOffset) { 4022 // User is shrinking the selection. 4023 if (currLine < mPrevLine) { 4024 // We're on a different line, so we'll snap to word boundaries. 4025 offset = start; 4026 } 4027 offset += mTouchWordOffset; 4028 positionCursor = true; 4029 mInWord = !isStartBoundary(offset); 4030 } 4031 4032 if (positionCursor) { 4033 final int selectionStart = mTextView.getSelectionStart(); 4034 if (offset <= selectionStart) { 4035 // We can't cross the handles so let's just constrain the Y value. 4036 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 4037 int length = mTextView.getText().length(); 4038 if (alteredOffset <= selectionStart) { 4039 // Can't pass the other drag handle. 4040 offset = getNextCursorOffset(selectionStart, true); 4041 } else { 4042 offset = Math.min(alteredOffset, length); 4043 } 4044 } 4045 positionAtCursorOffset(offset, false); 4046 } 4047 } 4048 4049 @Override 4050 public boolean onTouchEvent(MotionEvent event) { 4051 boolean superResult = super.onTouchEvent(event); 4052 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4053 // Reset the touch word offset when the user has lifted their finger. 4054 mTouchWordOffset = 0; 4055 } 4056 return superResult; 4057 } 4058 } 4059 4060 /** 4061 * A CursorController instance can be used to control a cursor in the text. 4062 */ 4063 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4064 /** 4065 * Makes the cursor controller visible on screen. 4066 * See also {@link #hide()}. 4067 */ 4068 public void show(); 4069 4070 /** 4071 * Hide the cursor controller from screen. 4072 * See also {@link #show()}. 4073 */ 4074 public void hide(); 4075 4076 /** 4077 * Called when the view is detached from window. Perform house keeping task, such as 4078 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4079 * preventing the activity from being recycled. 4080 */ 4081 public void onDetached(); 4082 } 4083 4084 private class InsertionPointCursorController implements CursorController { 4085 private InsertionHandleView mHandle; 4086 4087 public void show() { 4088 getHandle().show(); 4089 } 4090 4091 public void hide() { 4092 if (mHandle != null) { 4093 mHandle.hide(); 4094 } 4095 } 4096 4097 public void onTouchModeChanged(boolean isInTouchMode) { 4098 if (!isInTouchMode) { 4099 hide(); 4100 } 4101 } 4102 4103 private InsertionHandleView getHandle() { 4104 if (mSelectHandleCenter == null) { 4105 mSelectHandleCenter = mTextView.getContext().getDrawable( 4106 mTextView.mTextSelectHandleRes); 4107 } 4108 if (mHandle == null) { 4109 mHandle = new InsertionHandleView(mSelectHandleCenter); 4110 } 4111 return mHandle; 4112 } 4113 4114 @Override 4115 public void onDetached() { 4116 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4117 observer.removeOnTouchModeChangeListener(this); 4118 4119 if (mHandle != null) mHandle.onDetached(); 4120 } 4121 } 4122 4123 class SelectionModifierCursorController implements CursorController { 4124 // The cursor controller handles, lazily created when shown. 4125 private SelectionStartHandleView mStartHandle; 4126 private SelectionEndHandleView mEndHandle; 4127 // The offsets of that last touch down event. Remembered to start selection there. 4128 private int mMinTouchOffset, mMaxTouchOffset; 4129 4130 // Double tap detection 4131 private long mPreviousTapUpTime = 0; 4132 private float mDownPositionX, mDownPositionY; 4133 private boolean mGestureStayedInTapRegion; 4134 4135 // Where the user first starts the drag motion. 4136 private int mStartOffset = -1; 4137 // Indicates whether the user is selecting text and using the drag accelerator. 4138 private boolean mDragAcceleratorActive; 4139 4140 SelectionModifierCursorController() { 4141 resetTouchOffsets(); 4142 } 4143 4144 public void show() { 4145 if (mTextView.isInBatchEditMode()) { 4146 return; 4147 } 4148 initDrawables(); 4149 initHandles(); 4150 hideInsertionPointCursorController(); 4151 } 4152 4153 private void initDrawables() { 4154 if (mSelectHandleLeft == null) { 4155 mSelectHandleLeft = mTextView.getContext().getDrawable( 4156 mTextView.mTextSelectHandleLeftRes); 4157 } 4158 if (mSelectHandleRight == null) { 4159 mSelectHandleRight = mTextView.getContext().getDrawable( 4160 mTextView.mTextSelectHandleRightRes); 4161 } 4162 } 4163 4164 private void initHandles() { 4165 // Lazy object creation has to be done before updatePosition() is called. 4166 if (mStartHandle == null) { 4167 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4168 } 4169 if (mEndHandle == null) { 4170 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4171 } 4172 4173 mStartHandle.show(); 4174 mEndHandle.show(); 4175 4176 hideInsertionPointCursorController(); 4177 } 4178 4179 public void hide() { 4180 if (mStartHandle != null) mStartHandle.hide(); 4181 if (mEndHandle != null) mEndHandle.hide(); 4182 } 4183 4184 public void enterDrag() { 4185 // Just need to init the handles / hide insertion cursor. 4186 show(); 4187 mDragAcceleratorActive = true; 4188 // Start location of selection. 4189 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4190 mLastDownPositionY); 4191 // Don't show the handles until user has lifted finger. 4192 hide(); 4193 4194 // This stops scrolling parents from intercepting the touch event, allowing 4195 // the user to continue dragging across the screen to select text; TextView will 4196 // scroll as necessary. 4197 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4198 } 4199 4200 public void onTouchEvent(MotionEvent event) { 4201 // This is done even when the View does not have focus, so that long presses can start 4202 // selection and tap can move cursor from this tap position. 4203 switch (event.getActionMasked()) { 4204 case MotionEvent.ACTION_DOWN: 4205 final float x = event.getX(); 4206 final float y = event.getY(); 4207 4208 // Remember finger down position, to be able to start selection from there. 4209 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4210 4211 // Double tap detection 4212 if (mGestureStayedInTapRegion) { 4213 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 4214 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 4215 final float deltaX = x - mDownPositionX; 4216 final float deltaY = y - mDownPositionY; 4217 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4218 4219 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4220 mTextView.getContext()); 4221 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4222 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4223 4224 if (stayedInArea && isPositionOnText(x, y)) { 4225 startSelectionActionModeWithSelectionAndStartDrag(); 4226 mDiscardNextActionUp = true; 4227 } 4228 } 4229 } 4230 4231 mDownPositionX = x; 4232 mDownPositionY = y; 4233 mGestureStayedInTapRegion = true; 4234 break; 4235 4236 case MotionEvent.ACTION_POINTER_DOWN: 4237 case MotionEvent.ACTION_POINTER_UP: 4238 // Handle multi-point gestures. Keep min and max offset positions. 4239 // Only activated for devices that correctly handle multi-touch. 4240 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4241 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4242 updateMinAndMaxOffsets(event); 4243 } 4244 break; 4245 4246 case MotionEvent.ACTION_MOVE: 4247 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4248 mTextView.getContext()); 4249 4250 if (mGestureStayedInTapRegion) { 4251 final float deltaX = event.getX() - mDownPositionX; 4252 final float deltaY = event.getY() - mDownPositionY; 4253 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4254 4255 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4256 4257 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4258 mGestureStayedInTapRegion = false; 4259 } 4260 } 4261 4262 if (mStartHandle != null && mStartHandle.isShowing()) { 4263 // Don't do the drag if the handles are showing already. 4264 break; 4265 } 4266 4267 if (mStartOffset != -1) { 4268 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4269 event.getY()); 4270 int offset = rawOffset; 4271 4272 // We don't start "dragging" until the user is past the initial word that 4273 // gets selected on long press. 4274 int firstWordStart = getWordStart(mStartOffset); 4275 int firstWordEnd = getWordEnd(mStartOffset, false); 4276 if (offset > firstWordEnd || offset < firstWordStart) { 4277 4278 // Basically the goal in the below code is to have the highlight be 4279 // offset so that your finger isn't covering the end point. 4280 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4281 float mx = event.getX(); 4282 float my = event.getY(); 4283 if (mx > fingerOffset) mx -= fingerOffset; 4284 if (my > fingerOffset) my -= fingerOffset; 4285 offset = mTextView.getOffsetForPosition(mx, my); 4286 4287 // Perform the check for closeness at edge of view, if we're very close 4288 // don't adjust the offset to be in front of the finger - otherwise the 4289 // user can't select words at the edge. 4290 if (mTextView.getWidth() - fingerOffset > mx) { 4291 // We're going by word, so we need to make sure that the offset 4292 // that we get is within this, so we'll get the previous boundary. 4293 final WordIterator wordIterator = getWordIteratorWithText(); 4294 4295 final int precedingOffset = wordIterator.preceding(offset); 4296 if (mStartOffset < offset) { 4297 // Expanding with bottom handle, in this case the selection end 4298 // is before the finger. 4299 offset = Math.max(precedingOffset - 1, 0); 4300 } else { 4301 // Expand with the start handle, in this case the selection 4302 // start is before the finger. 4303 if (precedingOffset == WordIterator.DONE) { 4304 offset = 0; 4305 } else { 4306 offset = wordIterator.preceding(precedingOffset); 4307 } 4308 } 4309 } 4310 if (offset == WordIterator.DONE) 4311 offset = rawOffset; 4312 4313 // Need to adjust start offset based on direction of movement. 4314 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4315 : getWordEnd(mStartOffset, true); 4316 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4317 offset); 4318 } 4319 } 4320 break; 4321 4322 case MotionEvent.ACTION_UP: 4323 mPreviousTapUpTime = SystemClock.uptimeMillis(); 4324 if (mDragAcceleratorActive) { 4325 // No longer dragging to select text, let the parent intercept events. 4326 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4327 4328 show(); 4329 int startOffset = mTextView.getSelectionStart(); 4330 int endOffset = mTextView.getSelectionEnd(); 4331 4332 // Since we don't let drag handles pass once they're visible, we need to 4333 // make sure the start / end locations are correct because the user *can* 4334 // switch directions during the initial drag. 4335 if (endOffset < startOffset) { 4336 int tmp = endOffset; 4337 endOffset = startOffset; 4338 startOffset = tmp; 4339 4340 // Also update the selection with the right offsets in this case. 4341 Selection.setSelection((Spannable) mTextView.getText(), 4342 startOffset, endOffset); 4343 } 4344 4345 // Need to do this to display the handles. 4346 mStartHandle.showAtLocation(startOffset); 4347 mEndHandle.showAtLocation(endOffset); 4348 4349 // No longer the first dragging motion, reset. 4350 mDragAcceleratorActive = false; 4351 mStartOffset = -1; 4352 } 4353 break; 4354 } 4355 } 4356 4357 /** 4358 * @param event 4359 */ 4360 private void updateMinAndMaxOffsets(MotionEvent event) { 4361 int pointerCount = event.getPointerCount(); 4362 for (int index = 0; index < pointerCount; index++) { 4363 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4364 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4365 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4366 } 4367 } 4368 4369 public int getMinTouchOffset() { 4370 return mMinTouchOffset; 4371 } 4372 4373 public int getMaxTouchOffset() { 4374 return mMaxTouchOffset; 4375 } 4376 4377 public void resetTouchOffsets() { 4378 mMinTouchOffset = mMaxTouchOffset = -1; 4379 mStartOffset = -1; 4380 mDragAcceleratorActive = false; 4381 } 4382 4383 /** 4384 * @return true iff this controller is currently used to move the selection start. 4385 */ 4386 public boolean isSelectionStartDragged() { 4387 return mStartHandle != null && mStartHandle.isDragging(); 4388 } 4389 4390 /** 4391 * @return true if the user is selecting text using the drag accelerator. 4392 */ 4393 public boolean isDragAcceleratorActive() { 4394 return mDragAcceleratorActive; 4395 } 4396 4397 public void onTouchModeChanged(boolean isInTouchMode) { 4398 if (!isInTouchMode) { 4399 hide(); 4400 } 4401 } 4402 4403 @Override 4404 public void onDetached() { 4405 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4406 observer.removeOnTouchModeChangeListener(this); 4407 4408 if (mStartHandle != null) mStartHandle.onDetached(); 4409 if (mEndHandle != null) mEndHandle.onDetached(); 4410 } 4411 } 4412 4413 private class CorrectionHighlighter { 4414 private final Path mPath = new Path(); 4415 private final Paint mPaint = new Paint(); 4416 private int mStart, mEnd; 4417 private long mFadingStartTime; 4418 private RectF mTempRectF; 4419 private final static int FADE_OUT_DURATION = 400; 4420 4421 public CorrectionHighlighter() { 4422 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4423 applicationScale); 4424 mPaint.setStyle(Paint.Style.FILL); 4425 } 4426 4427 public void highlight(CorrectionInfo info) { 4428 mStart = info.getOffset(); 4429 mEnd = mStart + info.getNewText().length(); 4430 mFadingStartTime = SystemClock.uptimeMillis(); 4431 4432 if (mStart < 0 || mEnd < 0) { 4433 stopAnimation(); 4434 } 4435 } 4436 4437 public void draw(Canvas canvas, int cursorOffsetVertical) { 4438 if (updatePath() && updatePaint()) { 4439 if (cursorOffsetVertical != 0) { 4440 canvas.translate(0, cursorOffsetVertical); 4441 } 4442 4443 canvas.drawPath(mPath, mPaint); 4444 4445 if (cursorOffsetVertical != 0) { 4446 canvas.translate(0, -cursorOffsetVertical); 4447 } 4448 invalidate(true); // TODO invalidate cursor region only 4449 } else { 4450 stopAnimation(); 4451 invalidate(false); // TODO invalidate cursor region only 4452 } 4453 } 4454 4455 private boolean updatePaint() { 4456 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4457 if (duration > FADE_OUT_DURATION) return false; 4458 4459 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4460 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4461 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4462 ((int) (highlightColorAlpha * coef) << 24); 4463 mPaint.setColor(color); 4464 return true; 4465 } 4466 4467 private boolean updatePath() { 4468 final Layout layout = mTextView.getLayout(); 4469 if (layout == null) return false; 4470 4471 // Update in case text is edited while the animation is run 4472 final int length = mTextView.getText().length(); 4473 int start = Math.min(length, mStart); 4474 int end = Math.min(length, mEnd); 4475 4476 mPath.reset(); 4477 layout.getSelectionPath(start, end, mPath); 4478 return true; 4479 } 4480 4481 private void invalidate(boolean delayed) { 4482 if (mTextView.getLayout() == null) return; 4483 4484 if (mTempRectF == null) mTempRectF = new RectF(); 4485 mPath.computeBounds(mTempRectF, false); 4486 4487 int left = mTextView.getCompoundPaddingLeft(); 4488 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4489 4490 if (delayed) { 4491 mTextView.postInvalidateOnAnimation( 4492 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4493 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4494 } else { 4495 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4496 (int) mTempRectF.right, (int) mTempRectF.bottom); 4497 } 4498 } 4499 4500 private void stopAnimation() { 4501 Editor.this.mCorrectionHighlighter = null; 4502 } 4503 } 4504 4505 private static class ErrorPopup extends PopupWindow { 4506 private boolean mAbove = false; 4507 private final TextView mView; 4508 private int mPopupInlineErrorBackgroundId = 0; 4509 private int mPopupInlineErrorAboveBackgroundId = 0; 4510 4511 ErrorPopup(TextView v, int width, int height) { 4512 super(v, width, height); 4513 mView = v; 4514 // Make sure the TextView has a background set as it will be used the first time it is 4515 // shown and positioned. Initialized with below background, which should have 4516 // dimensions identical to the above version for this to work (and is more likely). 4517 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4518 com.android.internal.R.styleable.Theme_errorMessageBackground); 4519 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4520 } 4521 4522 void fixDirection(boolean above) { 4523 mAbove = above; 4524 4525 if (above) { 4526 mPopupInlineErrorAboveBackgroundId = 4527 getResourceId(mPopupInlineErrorAboveBackgroundId, 4528 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4529 } else { 4530 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4531 com.android.internal.R.styleable.Theme_errorMessageBackground); 4532 } 4533 4534 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4535 mPopupInlineErrorBackgroundId); 4536 } 4537 4538 private int getResourceId(int currentId, int index) { 4539 if (currentId == 0) { 4540 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4541 R.styleable.Theme); 4542 currentId = styledAttributes.getResourceId(index, 0); 4543 styledAttributes.recycle(); 4544 } 4545 return currentId; 4546 } 4547 4548 @Override 4549 public void update(int x, int y, int w, int h, boolean force) { 4550 super.update(x, y, w, h, force); 4551 4552 boolean above = isAboveAnchor(); 4553 if (above != mAbove) { 4554 fixDirection(above); 4555 } 4556 } 4557 } 4558 4559 static class InputContentType { 4560 int imeOptions = EditorInfo.IME_NULL; 4561 String privateImeOptions; 4562 CharSequence imeActionLabel; 4563 int imeActionId; 4564 Bundle extras; 4565 OnEditorActionListener onEditorActionListener; 4566 boolean enterDown; 4567 } 4568 4569 static class InputMethodState { 4570 ExtractedTextRequest mExtractedTextRequest; 4571 final ExtractedText mExtractedText = new ExtractedText(); 4572 int mBatchEditNesting; 4573 boolean mCursorChanged; 4574 boolean mSelectionModeChanged; 4575 boolean mContentChanged; 4576 int mChangedStart, mChangedEnd, mChangedDelta; 4577 } 4578 4579 /** 4580 * @return True iff (start, end) is a valid range within the text. 4581 */ 4582 private static boolean isValidRange(CharSequence text, int start, int end) { 4583 return 0 <= start && start <= end && end <= text.length(); 4584 } 4585 4586 /** 4587 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4588 * text being typed (and hence always returns null from the filter() method). 4589 */ 4590 public static class UndoInputFilter implements InputFilter { 4591 private final Editor mEditor; 4592 4593 // Whether the current filter pass is directly caused by an end-user text edit. 4594 private boolean mIsUserEdit; 4595 4596 // Whether the text field is handling an IME composition. Must be parceled in case the user 4597 // rotates the screen during composition. 4598 private boolean mHasComposition; 4599 4600 public UndoInputFilter(Editor editor) { 4601 mEditor = editor; 4602 } 4603 4604 public void saveInstanceState(Parcel parcel) { 4605 parcel.writeInt(mIsUserEdit ? 1 : 0); 4606 parcel.writeInt(mHasComposition ? 1 : 0); 4607 } 4608 4609 public void restoreInstanceState(Parcel parcel) { 4610 mIsUserEdit = parcel.readInt() != 0; 4611 mHasComposition = parcel.readInt() != 0; 4612 } 4613 4614 /** 4615 * Signals that a user-triggered edit is starting. 4616 */ 4617 public void beginBatchEdit() { 4618 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4619 mIsUserEdit = true; 4620 } 4621 4622 public void endBatchEdit() { 4623 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4624 mIsUserEdit = false; 4625 } 4626 4627 @Override 4628 public CharSequence filter(CharSequence source, int start, int end, 4629 Spanned dest, int dstart, int dend) { 4630 if (DEBUG_UNDO) { 4631 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4632 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4633 } 4634 4635 // Check to see if this edit should be tracked for undo. 4636 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4637 return null; 4638 } 4639 4640 // Check for and handle IME composition edits. 4641 if (handleCompositionEdit(source, start, end, dstart)) { 4642 return null; 4643 } 4644 4645 // Handle keyboard edits. 4646 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4647 return null; 4648 } 4649 4650 /** 4651 * Returns true iff the edit was handled, either because it should be ignored or because 4652 * this function created an undo operation for it. 4653 */ 4654 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4655 // Ignore edits while the user is composing. 4656 if (isComposition(source)) { 4657 mHasComposition = true; 4658 return true; 4659 } 4660 final boolean hadComposition = mHasComposition; 4661 mHasComposition = false; 4662 4663 // Check for the transition out of the composing state. 4664 if (hadComposition) { 4665 // If there was no text the user canceled composition. Ignore the edit. 4666 if (start == end) { 4667 return true; 4668 } 4669 4670 // Otherwise the user inserted the composition. 4671 String newText = TextUtils.substring(source, start, end); 4672 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4673 recordEdit(edit, false /* forceMerge */); 4674 return true; 4675 } 4676 4677 // This was neither a composition event nor a transition out of composing. 4678 return false; 4679 } 4680 4681 private void handleKeyboardEdit(CharSequence source, int start, int end, 4682 Spanned dest, int dstart, int dend) { 4683 // An application may install a TextWatcher to provide additional modifications after 4684 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4685 // string). This results in multiple filter() calls for what the user considers to be 4686 // a single operation. Always undo the whole set of changes in one step. 4687 final boolean forceMerge = isInTextWatcher(); 4688 4689 // Build a new operation with all the information from this edit. 4690 String newText = TextUtils.substring(source, start, end); 4691 String oldText = TextUtils.substring(dest, dstart, dend); 4692 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4693 recordEdit(edit, forceMerge); 4694 } 4695 4696 /** 4697 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4698 * If forceMerge is true then the new edit is always merged. 4699 */ 4700 private void recordEdit(EditOperation edit, boolean forceMerge) { 4701 // Fetch the last edit operation and attempt to merge in the new edit. 4702 final UndoManager um = mEditor.mUndoManager; 4703 um.beginUpdate("Edit text"); 4704 EditOperation lastEdit = um.getLastOperation( 4705 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4706 if (lastEdit == null) { 4707 // Add this as the first edit. 4708 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4709 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4710 } else if (forceMerge) { 4711 // Forced merges take priority because they could be the result of a non-user-edit 4712 // change and this case should not create a new undo operation. 4713 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4714 lastEdit.forceMergeWith(edit); 4715 } else if (!mIsUserEdit) { 4716 // An application directly modified the Editable outside of a text edit. Treat this 4717 // as a new change and don't attempt to merge. 4718 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4719 um.commitState(mEditor.mUndoOwner); 4720 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4721 } else if (lastEdit.mergeWith(edit)) { 4722 // Merge succeeded, nothing else to do. 4723 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4724 } else { 4725 // Could not merge with the last edit, so commit the last edit and add this edit. 4726 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4727 um.commitState(mEditor.mUndoOwner); 4728 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4729 } 4730 um.endUpdate(); 4731 } 4732 4733 private boolean canUndoEdit(CharSequence source, int start, int end, 4734 Spanned dest, int dstart, int dend) { 4735 if (!mEditor.mAllowUndo) { 4736 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4737 return false; 4738 } 4739 4740 if (mEditor.mUndoManager.isInUndo()) { 4741 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4742 return false; 4743 } 4744 4745 // Text filters run before input operations are applied. However, some input operations 4746 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4747 // attempt to undo invalid operations. 4748 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4749 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4750 return false; 4751 } 4752 4753 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4754 // on an input field. Skip no-op changes. 4755 if (start == end && dstart == dend) { 4756 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4757 return false; 4758 } 4759 4760 return true; 4761 } 4762 4763 private boolean isComposition(CharSequence source) { 4764 if (!(source instanceof Spannable)) { 4765 return false; 4766 } 4767 // This is a composition edit if the source has a non-zero-length composing span. 4768 Spannable text = (Spannable) source; 4769 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4770 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4771 return composeBegin < composeEnd; 4772 } 4773 4774 private boolean isInTextWatcher() { 4775 CharSequence text = mEditor.mTextView.getText(); 4776 return (text instanceof SpannableStringBuilder) 4777 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4778 } 4779 } 4780 4781 /** 4782 * An operation to undo a single "edit" to a text view. 4783 */ 4784 public static class EditOperation extends UndoOperation<Editor> { 4785 private static final int TYPE_INSERT = 0; 4786 private static final int TYPE_DELETE = 1; 4787 private static final int TYPE_REPLACE = 2; 4788 4789 private int mType; 4790 private String mOldText; 4791 private int mOldTextStart; 4792 private String mNewText; 4793 private int mNewTextStart; 4794 4795 private int mOldCursorPos; 4796 private int mNewCursorPos; 4797 4798 /** 4799 * Constructs an edit operation from a text input operation on editor that replaces the 4800 * oldText starting at dstart with newText. 4801 */ 4802 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 4803 super(editor.mUndoOwner); 4804 mOldText = oldText; 4805 mNewText = newText; 4806 4807 // Determine the type of the edit and store where it occurred. Avoid storing 4808 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4809 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4810 // outside the bounds of the final text). 4811 if (mNewText.length() > 0 && mOldText.length() == 0) { 4812 mType = TYPE_INSERT; 4813 mNewTextStart = dstart; 4814 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4815 mType = TYPE_DELETE; 4816 mOldTextStart = dstart; 4817 } else { 4818 mType = TYPE_REPLACE; 4819 mOldTextStart = mNewTextStart = dstart; 4820 } 4821 4822 // Store cursor data. 4823 mOldCursorPos = editor.mTextView.getSelectionStart(); 4824 mNewCursorPos = dstart + mNewText.length(); 4825 } 4826 4827 public EditOperation(Parcel src, ClassLoader loader) { 4828 super(src, loader); 4829 mType = src.readInt(); 4830 mOldText = src.readString(); 4831 mOldTextStart = src.readInt(); 4832 mNewText = src.readString(); 4833 mNewTextStart = src.readInt(); 4834 mOldCursorPos = src.readInt(); 4835 mNewCursorPos = src.readInt(); 4836 } 4837 4838 @Override 4839 public void writeToParcel(Parcel dest, int flags) { 4840 dest.writeInt(mType); 4841 dest.writeString(mOldText); 4842 dest.writeInt(mOldTextStart); 4843 dest.writeString(mNewText); 4844 dest.writeInt(mNewTextStart); 4845 dest.writeInt(mOldCursorPos); 4846 dest.writeInt(mNewCursorPos); 4847 } 4848 4849 private int getNewTextEnd() { 4850 return mNewTextStart + mNewText.length(); 4851 } 4852 4853 private int getOldTextEnd() { 4854 return mOldTextStart + mOldText.length(); 4855 } 4856 4857 @Override 4858 public void commit() { 4859 } 4860 4861 @Override 4862 public void undo() { 4863 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4864 // Remove the new text and insert the old. 4865 Editor editor = getOwnerData(); 4866 Editable text = (Editable) editor.mTextView.getText(); 4867 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4868 mOldCursorPos); 4869 } 4870 4871 @Override 4872 public void redo() { 4873 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4874 // Remove the old text and insert the new. 4875 Editor editor = getOwnerData(); 4876 Editable text = (Editable) editor.mTextView.getText(); 4877 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4878 mNewCursorPos); 4879 } 4880 4881 /** 4882 * Attempts to merge this existing operation with a new edit. 4883 * @param edit The new edit operation. 4884 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4885 * object unchanged. 4886 */ 4887 private boolean mergeWith(EditOperation edit) { 4888 if (DEBUG_UNDO) { 4889 Log.d(TAG, "mergeWith old " + this); 4890 Log.d(TAG, "mergeWith new " + edit); 4891 } 4892 switch (mType) { 4893 case TYPE_INSERT: 4894 return mergeInsertWith(edit); 4895 case TYPE_DELETE: 4896 return mergeDeleteWith(edit); 4897 case TYPE_REPLACE: 4898 return mergeReplaceWith(edit); 4899 default: 4900 return false; 4901 } 4902 } 4903 4904 private boolean mergeInsertWith(EditOperation edit) { 4905 // Only merge continuous insertions. 4906 if (edit.mType != TYPE_INSERT) { 4907 return false; 4908 } 4909 // Only merge insertions that are contiguous. 4910 if (getNewTextEnd() != edit.mNewTextStart) { 4911 return false; 4912 } 4913 mNewText += edit.mNewText; 4914 mNewCursorPos = edit.mNewCursorPos; 4915 return true; 4916 } 4917 4918 // TODO: Support forward delete. 4919 private boolean mergeDeleteWith(EditOperation edit) { 4920 // Only merge continuous deletes. 4921 if (edit.mType != TYPE_DELETE) { 4922 return false; 4923 } 4924 // Only merge deletions that are contiguous. 4925 if (mOldTextStart != edit.getOldTextEnd()) { 4926 return false; 4927 } 4928 mOldTextStart = edit.mOldTextStart; 4929 mOldText = edit.mOldText + mOldText; 4930 mNewCursorPos = edit.mNewCursorPos; 4931 return true; 4932 } 4933 4934 private boolean mergeReplaceWith(EditOperation edit) { 4935 // Replacements can merge only with adjacent inserts. 4936 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 4937 return false; 4938 } 4939 mOldText += edit.mOldText; 4940 mNewText += edit.mNewText; 4941 mNewCursorPos = edit.mNewCursorPos; 4942 return true; 4943 } 4944 4945 /** 4946 * Forcibly creates a single merged edit operation by simulating the entire text 4947 * contents being replaced. 4948 */ 4949 public void forceMergeWith(EditOperation edit) { 4950 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 4951 Editor editor = getOwnerData(); 4952 4953 // Copy the text of the current field. 4954 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 4955 // but would require two parallel implementations of modifyText() because Editable and 4956 // StringBuilder do not share an interface for replace/delete/insert. 4957 Editable editable = (Editable) editor.mTextView.getText(); 4958 Editable originalText = new SpannableStringBuilder(editable.toString()); 4959 4960 // Roll back the last operation. 4961 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4962 mOldCursorPos); 4963 4964 // Clone the text again and apply the new operation. 4965 Editable finalText = new SpannableStringBuilder(editable.toString()); 4966 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 4967 edit.mNewTextStart, edit.mNewCursorPos); 4968 4969 // Convert this operation into a non-mergeable replacement of the entire string. 4970 mType = TYPE_REPLACE; 4971 mNewText = finalText.toString(); 4972 mNewTextStart = 0; 4973 mOldText = originalText.toString(); 4974 mOldTextStart = 0; 4975 mNewCursorPos = edit.mNewCursorPos; 4976 // mOldCursorPos is unchanged. 4977 } 4978 4979 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 4980 CharSequence newText, int newTextInsertAt, int newCursorPos) { 4981 // Apply the edit if it is still valid. 4982 if (isValidRange(text, deleteFrom, deleteTo) && 4983 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 4984 if (deleteFrom != deleteTo) { 4985 text.delete(deleteFrom, deleteTo); 4986 } 4987 if (newText.length() != 0) { 4988 text.insert(newTextInsertAt, newText); 4989 } 4990 } 4991 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 4992 // don't explicitly set it and rely on SpannableStringBuilder to position it. 4993 // TODO: Select all the text that was undone. 4994 if (0 <= newCursorPos && newCursorPos <= text.length()) { 4995 Selection.setSelection(text, newCursorPos); 4996 } 4997 } 4998 4999 private String getTypeString() { 5000 switch (mType) { 5001 case TYPE_INSERT: 5002 return "insert"; 5003 case TYPE_DELETE: 5004 return "delete"; 5005 case TYPE_REPLACE: 5006 return "replace"; 5007 default: 5008 return ""; 5009 } 5010 } 5011 5012 @Override 5013 public String toString() { 5014 return "[mType=" + getTypeString() + ", " + 5015 "mOldText=" + mOldText + ", " + 5016 "mOldTextStart=" + mOldTextStart + ", " + 5017 "mNewText=" + mNewText + ", " + 5018 "mNewTextStart=" + mNewTextStart + ", " + 5019 "mOldCursorPos=" + mOldCursorPos + ", " + 5020 "mNewCursorPos=" + mNewCursorPos + "]"; 5021 } 5022 5023 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5024 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5025 @Override 5026 public EditOperation createFromParcel(Parcel in) { 5027 return new EditOperation(in, null); 5028 } 5029 5030 @Override 5031 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5032 return new EditOperation(in, loader); 5033 } 5034 5035 @Override 5036 public EditOperation[] newArray(int size) { 5037 return new EditOperation[size]; 5038 } 5039 }; 5040 } 5041} 5042