Editor.java revision 9c36ee9b4f42909c1a425322e4e2d3e86dd6edc5
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.Nullable; 21import android.app.PendingIntent; 22import android.app.PendingIntent.CanceledException; 23import android.content.ClipData; 24import android.content.ClipData.Item; 25import android.content.Context; 26import android.content.Intent; 27import android.content.UndoManager; 28import android.content.UndoOperation; 29import android.content.UndoOwner; 30import android.content.pm.PackageManager; 31import android.content.pm.ResolveInfo; 32import android.content.res.TypedArray; 33import android.graphics.Canvas; 34import android.graphics.Color; 35import android.graphics.Matrix; 36import android.graphics.Paint; 37import android.graphics.Path; 38import android.graphics.Rect; 39import android.graphics.RectF; 40import android.graphics.drawable.Drawable; 41import android.inputmethodservice.ExtractEditText; 42import android.os.Bundle; 43import android.os.Handler; 44import android.os.Parcel; 45import android.os.Parcelable; 46import android.os.ParcelableParcel; 47import android.os.SystemClock; 48import android.provider.Settings; 49import android.text.DynamicLayout; 50import android.text.Editable; 51import android.text.InputFilter; 52import android.text.InputType; 53import android.text.Layout; 54import android.text.ParcelableSpan; 55import android.text.Selection; 56import android.text.SpanWatcher; 57import android.text.Spannable; 58import android.text.SpannableStringBuilder; 59import android.text.Spanned; 60import android.text.StaticLayout; 61import android.text.TextUtils; 62import android.text.method.KeyListener; 63import android.text.method.MetaKeyKeyListener; 64import android.text.method.MovementMethod; 65import android.text.method.PasswordTransformationMethod; 66import android.text.method.WordIterator; 67import android.text.style.EasyEditSpan; 68import android.text.style.SuggestionRangeSpan; 69import android.text.style.SuggestionSpan; 70import android.text.style.TextAppearanceSpan; 71import android.text.style.URLSpan; 72import android.util.DisplayMetrics; 73import android.util.Log; 74import android.view.ActionMode; 75import android.view.ActionMode.Callback; 76import android.view.DisplayListCanvas; 77import android.view.DragEvent; 78import android.view.Gravity; 79import android.view.LayoutInflater; 80import android.view.Menu; 81import android.view.MenuItem; 82import android.view.MotionEvent; 83import android.view.RenderNode; 84import android.view.View; 85import android.view.View.DragShadowBuilder; 86import android.view.View.OnClickListener; 87import android.view.ViewConfiguration; 88import android.view.ViewGroup; 89import android.view.ViewGroup.LayoutParams; 90import android.view.ViewParent; 91import android.view.ViewTreeObserver; 92import android.view.WindowManager; 93import android.view.inputmethod.CorrectionInfo; 94import android.view.inputmethod.CursorAnchorInfo; 95import android.view.inputmethod.EditorInfo; 96import android.view.inputmethod.ExtractedText; 97import android.view.inputmethod.ExtractedTextRequest; 98import android.view.inputmethod.InputConnection; 99import android.view.inputmethod.InputMethodManager; 100import android.widget.AdapterView.OnItemClickListener; 101import android.widget.TextView.Drawables; 102import android.widget.TextView.OnEditorActionListener; 103 104import com.android.internal.util.ArrayUtils; 105import com.android.internal.util.GrowingArrayUtils; 106import com.android.internal.widget.EditableInputConnection; 107 108import java.text.BreakIterator; 109import java.util.Arrays; 110import java.util.Comparator; 111import java.util.HashMap; 112import java.util.List; 113 114/** 115 * Helper class used by TextView to handle editable text views. 116 * 117 * @hide 118 */ 119public class Editor { 120 private static final String TAG = "Editor"; 121 private static final boolean DEBUG_UNDO = false; 122 123 static final int BLINK = 500; 124 private static final float[] TEMP_POSITION = new float[2]; 125 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 126 // Tag used when the Editor maintains its own separate UndoManager. 127 private static final String UNDO_OWNER_TAG = "Editor"; 128 129 // Each Editor manages its own undo stack. 130 private final UndoManager mUndoManager = new UndoManager(); 131 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 132 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 133 boolean mAllowUndo = true; 134 135 // Cursor Controllers. 136 InsertionPointCursorController mInsertionPointCursorController; 137 SelectionModifierCursorController mSelectionModifierCursorController; 138 ActionMode mSelectionActionMode; 139 boolean mInsertionControllerEnabled; 140 boolean mSelectionControllerEnabled; 141 142 // Used to highlight a word when it is corrected by the IME 143 CorrectionHighlighter mCorrectionHighlighter; 144 145 InputContentType mInputContentType; 146 InputMethodState mInputMethodState; 147 148 private static class TextRenderNode { 149 RenderNode renderNode; 150 boolean isDirty; 151 public TextRenderNode(String name) { 152 isDirty = true; 153 renderNode = RenderNode.create(name, null); 154 } 155 boolean needsRecord() { return isDirty || !renderNode.isValid(); } 156 } 157 TextRenderNode[] mTextRenderNodes; 158 159 boolean mFrozenWithFocus; 160 boolean mSelectionMoved; 161 boolean mTouchFocusSelected; 162 163 KeyListener mKeyListener; 164 int mInputType = EditorInfo.TYPE_NULL; 165 166 boolean mDiscardNextActionUp; 167 boolean mIgnoreActionUpEvent; 168 169 long mShowCursor; 170 Blink mBlink; 171 172 boolean mCursorVisible = true; 173 boolean mSelectAllOnFocus; 174 boolean mTextIsSelectable; 175 176 CharSequence mError; 177 boolean mErrorWasChanged; 178 ErrorPopup mErrorPopup; 179 180 /** 181 * This flag is set if the TextView tries to display an error before it 182 * is attached to the window (so its position is still unknown). 183 * It causes the error to be shown later, when onAttachedToWindow() 184 * is called. 185 */ 186 boolean mShowErrorAfterAttach; 187 188 boolean mInBatchEditControllers; 189 boolean mShowSoftInputOnFocus = true; 190 boolean mPreserveDetachedSelection; 191 boolean mTemporaryDetach; 192 193 SuggestionsPopupWindow mSuggestionsPopupWindow; 194 SuggestionRangeSpan mSuggestionRangeSpan; 195 Runnable mShowSuggestionRunnable; 196 197 final Drawable[] mCursorDrawable = new Drawable[2]; 198 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 199 200 private Drawable mSelectHandleLeft; 201 private Drawable mSelectHandleRight; 202 private Drawable mSelectHandleCenter; 203 204 // Global listener that detects changes in the global position of the TextView 205 private PositionListener mPositionListener; 206 207 float mLastDownPositionX, mLastDownPositionY; 208 Callback mCustomSelectionActionModeCallback; 209 210 // Set when this TextView gained focus with some text selected. Will start selection mode. 211 boolean mCreatedWithASelection; 212 213 // The span controller helps monitoring the changes to which the Editor needs to react: 214 // - EasyEditSpans, for which we have some UI to display on attach and on hide 215 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 216 private SpanController mSpanController; 217 218 WordIterator mWordIterator; 219 SpellChecker mSpellChecker; 220 221 // This word iterator is set with text and used to determine word boundaries 222 // when a user is selecting text. 223 private WordIterator mWordIteratorWithText; 224 // Indicate that the text in the word iterator needs to be updated. 225 private boolean mUpdateWordIteratorText; 226 227 private Rect mTempRect; 228 229 private TextView mTextView; 230 231 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 232 233 Editor(TextView textView) { 234 mTextView = textView; 235 // Synchronize the filter list, which places the undo input filter at the end. 236 mTextView.setFilters(mTextView.getFilters()); 237 } 238 239 ParcelableParcel saveInstanceState() { 240 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 241 Parcel parcel = state.getParcel(); 242 mUndoManager.saveInstanceState(parcel); 243 mUndoInputFilter.saveInstanceState(parcel); 244 return state; 245 } 246 247 void restoreInstanceState(ParcelableParcel state) { 248 Parcel parcel = state.getParcel(); 249 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 250 mUndoInputFilter.restoreInstanceState(parcel); 251 // Re-associate this object as the owner of undo state. 252 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 253 } 254 255 /** 256 * Forgets all undo and redo operations for this Editor. 257 */ 258 void forgetUndoRedo() { 259 UndoOwner[] owners = { mUndoOwner }; 260 mUndoManager.forgetUndos(owners, -1 /* all */); 261 mUndoManager.forgetRedos(owners, -1 /* all */); 262 } 263 264 boolean canUndo() { 265 UndoOwner[] owners = { mUndoOwner }; 266 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 267 } 268 269 boolean canRedo() { 270 UndoOwner[] owners = { mUndoOwner }; 271 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 272 } 273 274 void undo() { 275 if (!mAllowUndo) { 276 return; 277 } 278 UndoOwner[] owners = { mUndoOwner }; 279 mUndoManager.undo(owners, 1); // Undo 1 action. 280 } 281 282 void redo() { 283 if (!mAllowUndo) { 284 return; 285 } 286 UndoOwner[] owners = { mUndoOwner }; 287 mUndoManager.redo(owners, 1); // Redo 1 action. 288 } 289 290 void onAttachedToWindow() { 291 if (mShowErrorAfterAttach) { 292 showError(); 293 mShowErrorAfterAttach = false; 294 } 295 mTemporaryDetach = false; 296 297 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 298 // No need to create the controller. 299 // The get method will add the listener on controller creation. 300 if (mInsertionPointCursorController != null) { 301 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 302 } 303 if (mSelectionModifierCursorController != null) { 304 mSelectionModifierCursorController.resetTouchOffsets(); 305 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 306 } 307 updateSpellCheckSpans(0, mTextView.getText().length(), 308 true /* create the spell checker if needed */); 309 310 if (mTextView.hasTransientState() && 311 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 312 // Since transient state is reference counted make sure it stays matched 313 // with our own calls to it for managing selection. 314 // The action mode callback will set this back again when/if the action mode starts. 315 mTextView.setHasTransientState(false); 316 317 // We had an active selection from before, start the selection mode. 318 startSelectionActionModeWithSelection(); 319 } 320 321 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 322 resumeBlink(); 323 } 324 325 void onDetachedFromWindow() { 326 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 327 328 if (mError != null) { 329 hideError(); 330 } 331 332 suspendBlink(); 333 334 if (mInsertionPointCursorController != null) { 335 mInsertionPointCursorController.onDetached(); 336 } 337 338 if (mSelectionModifierCursorController != null) { 339 mSelectionModifierCursorController.onDetached(); 340 } 341 342 if (mShowSuggestionRunnable != null) { 343 mTextView.removeCallbacks(mShowSuggestionRunnable); 344 } 345 346 destroyDisplayListsData(); 347 348 if (mSpellChecker != null) { 349 mSpellChecker.closeSession(); 350 // Forces the creation of a new SpellChecker next time this window is created. 351 // Will handle the cases where the settings has been changed in the meantime. 352 mSpellChecker = null; 353 } 354 355 mPreserveDetachedSelection = true; 356 hideControllers(); 357 mPreserveDetachedSelection = false; 358 mTemporaryDetach = false; 359 } 360 361 private void destroyDisplayListsData() { 362 if (mTextRenderNodes != null) { 363 for (int i = 0; i < mTextRenderNodes.length; i++) { 364 RenderNode displayList = mTextRenderNodes[i] != null 365 ? mTextRenderNodes[i].renderNode : null; 366 if (displayList != null && displayList.isValid()) { 367 displayList.destroyDisplayListData(); 368 } 369 } 370 } 371 } 372 373 private void showError() { 374 if (mTextView.getWindowToken() == null) { 375 mShowErrorAfterAttach = true; 376 return; 377 } 378 379 if (mErrorPopup == null) { 380 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 381 final TextView err = (TextView) inflater.inflate( 382 com.android.internal.R.layout.textview_hint, null); 383 384 final float scale = mTextView.getResources().getDisplayMetrics().density; 385 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 386 mErrorPopup.setFocusable(false); 387 // The user is entering text, so the input method is needed. We 388 // don't want the popup to be displayed on top of it. 389 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 390 } 391 392 TextView tv = (TextView) mErrorPopup.getContentView(); 393 chooseSize(mErrorPopup, mError, tv); 394 tv.setText(mError); 395 396 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 397 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 398 } 399 400 public void setError(CharSequence error, Drawable icon) { 401 mError = TextUtils.stringOrSpannedString(error); 402 mErrorWasChanged = true; 403 404 if (mError == null) { 405 setErrorIcon(null); 406 if (mErrorPopup != null) { 407 if (mErrorPopup.isShowing()) { 408 mErrorPopup.dismiss(); 409 } 410 411 mErrorPopup = null; 412 } 413 mShowErrorAfterAttach = false; 414 } else { 415 setErrorIcon(icon); 416 if (mTextView.isFocused()) { 417 showError(); 418 } 419 } 420 } 421 422 private void setErrorIcon(Drawable icon) { 423 Drawables dr = mTextView.mDrawables; 424 if (dr == null) { 425 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 426 } 427 dr.setErrorDrawable(icon, mTextView); 428 429 mTextView.resetResolvedDrawables(); 430 mTextView.invalidate(); 431 mTextView.requestLayout(); 432 } 433 434 private void hideError() { 435 if (mErrorPopup != null) { 436 if (mErrorPopup.isShowing()) { 437 mErrorPopup.dismiss(); 438 } 439 } 440 441 mShowErrorAfterAttach = false; 442 } 443 444 /** 445 * Returns the X offset to make the pointy top of the error point 446 * at the middle of the error icon. 447 */ 448 private int getErrorX() { 449 /* 450 * The "25" is the distance between the point and the right edge 451 * of the background 452 */ 453 final float scale = mTextView.getResources().getDisplayMetrics().density; 454 455 final Drawables dr = mTextView.mDrawables; 456 457 final int layoutDirection = mTextView.getLayoutDirection(); 458 int errorX; 459 int offset; 460 switch (layoutDirection) { 461 default: 462 case View.LAYOUT_DIRECTION_LTR: 463 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 464 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 465 mTextView.getPaddingRight() + offset; 466 break; 467 case View.LAYOUT_DIRECTION_RTL: 468 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 469 errorX = mTextView.getPaddingLeft() + offset; 470 break; 471 } 472 return errorX; 473 } 474 475 /** 476 * Returns the Y offset to make the pointy top of the error point 477 * at the bottom of the error icon. 478 */ 479 private int getErrorY() { 480 /* 481 * Compound, not extended, because the icon is not clipped 482 * if the text height is smaller. 483 */ 484 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 485 int vspace = mTextView.getBottom() - mTextView.getTop() - 486 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 487 488 final Drawables dr = mTextView.mDrawables; 489 490 final int layoutDirection = mTextView.getLayoutDirection(); 491 int height; 492 switch (layoutDirection) { 493 default: 494 case View.LAYOUT_DIRECTION_LTR: 495 height = (dr != null ? dr.mDrawableHeightRight : 0); 496 break; 497 case View.LAYOUT_DIRECTION_RTL: 498 height = (dr != null ? dr.mDrawableHeightLeft : 0); 499 break; 500 } 501 502 int icontop = compoundPaddingTop + (vspace - height) / 2; 503 504 /* 505 * The "2" is the distance between the point and the top edge 506 * of the background. 507 */ 508 final float scale = mTextView.getResources().getDisplayMetrics().density; 509 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 510 } 511 512 void createInputContentTypeIfNeeded() { 513 if (mInputContentType == null) { 514 mInputContentType = new InputContentType(); 515 } 516 } 517 518 void createInputMethodStateIfNeeded() { 519 if (mInputMethodState == null) { 520 mInputMethodState = new InputMethodState(); 521 } 522 } 523 524 boolean isCursorVisible() { 525 // The default value is true, even when there is no associated Editor 526 return mCursorVisible && mTextView.isTextEditable(); 527 } 528 529 void prepareCursorControllers() { 530 boolean windowSupportsHandles = false; 531 532 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 533 if (params instanceof WindowManager.LayoutParams) { 534 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 535 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 536 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 537 } 538 539 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 540 mInsertionControllerEnabled = enabled && isCursorVisible(); 541 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 542 543 if (!mInsertionControllerEnabled) { 544 hideInsertionPointCursorController(); 545 if (mInsertionPointCursorController != null) { 546 mInsertionPointCursorController.onDetached(); 547 mInsertionPointCursorController = null; 548 } 549 } 550 551 if (!mSelectionControllerEnabled) { 552 stopSelectionActionMode(); 553 if (mSelectionModifierCursorController != null) { 554 mSelectionModifierCursorController.onDetached(); 555 mSelectionModifierCursorController = null; 556 } 557 } 558 } 559 560 void hideInsertionPointCursorController() { 561 if (mInsertionPointCursorController != null) { 562 mInsertionPointCursorController.hide(); 563 } 564 } 565 566 /** 567 * Hides the insertion controller and stops text selection mode, hiding the selection controller 568 */ 569 void hideControllers() { 570 hideCursorControllers(); 571 hideSpanControllers(); 572 } 573 574 private void hideSpanControllers() { 575 if (mSpanController != null) { 576 mSpanController.hide(); 577 } 578 } 579 580 private void hideCursorControllers() { 581 if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) { 582 // Should be done before hide insertion point controller since it triggers a show of it 583 mSuggestionsPopupWindow.hide(); 584 } 585 hideInsertionPointCursorController(); 586 stopSelectionActionMode(); 587 } 588 589 /** 590 * Create new SpellCheckSpans on the modified region. 591 */ 592 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 593 // Remove spans whose adjacent characters are text not punctuation 594 mTextView.removeAdjacentSuggestionSpans(start); 595 mTextView.removeAdjacentSuggestionSpans(end); 596 597 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 598 !(mTextView instanceof ExtractEditText)) { 599 if (mSpellChecker == null && createSpellChecker) { 600 mSpellChecker = new SpellChecker(mTextView); 601 } 602 if (mSpellChecker != null) { 603 mSpellChecker.spellCheck(start, end); 604 } 605 } 606 } 607 608 void onScreenStateChanged(int screenState) { 609 switch (screenState) { 610 case View.SCREEN_STATE_ON: 611 resumeBlink(); 612 break; 613 case View.SCREEN_STATE_OFF: 614 suspendBlink(); 615 break; 616 } 617 } 618 619 private void suspendBlink() { 620 if (mBlink != null) { 621 mBlink.cancel(); 622 } 623 } 624 625 private void resumeBlink() { 626 if (mBlink != null) { 627 mBlink.uncancel(); 628 makeBlink(); 629 } 630 } 631 632 void adjustInputType(boolean password, boolean passwordInputType, 633 boolean webPasswordInputType, boolean numberPasswordInputType) { 634 // mInputType has been set from inputType, possibly modified by mInputMethod. 635 // Specialize mInputType to [web]password if we have a text class and the original input 636 // type was a password. 637 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 638 if (password || passwordInputType) { 639 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 640 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 641 } 642 if (webPasswordInputType) { 643 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 644 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 645 } 646 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 647 if (numberPasswordInputType) { 648 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 649 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 650 } 651 } 652 } 653 654 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 655 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 656 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 657 658 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 659 com.android.internal.R.dimen.textview_error_popup_default_width); 660 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 661 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 662 float max = 0; 663 for (int i = 0; i < l.getLineCount(); i++) { 664 max = Math.max(max, l.getLineWidth(i)); 665 } 666 667 /* 668 * Now set the popup size to be big enough for the text plus the border capped 669 * to DEFAULT_MAX_POPUP_WIDTH 670 */ 671 pop.setWidth(wid + (int) Math.ceil(max)); 672 pop.setHeight(ht + l.getHeight()); 673 } 674 675 void setFrame() { 676 if (mErrorPopup != null) { 677 TextView tv = (TextView) mErrorPopup.getContentView(); 678 chooseSize(mErrorPopup, mError, tv); 679 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 680 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 681 } 682 } 683 684 /** 685 * Unlike {@link TextView#textCanBeSelected()}, this method is based on the <i>current</i> state 686 * of the TextView. textCanBeSelected() has to be true (this is one of the conditions to have 687 * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient. 688 */ 689 private boolean canSelectText() { 690 return hasSelectionController() && mTextView.getText().length() != 0; 691 } 692 693 /** 694 * It would be better to rely on the input type for everything. A password inputType should have 695 * a password transformation. We should hence use isPasswordInputType instead of this method. 696 * 697 * We should: 698 * - Call setInputType in setKeyListener instead of changing the input type directly (which 699 * would install the correct transformation). 700 * - Refuse the installation of a non-password transformation in setTransformation if the input 701 * type is password. 702 * 703 * However, this is like this for legacy reasons and we cannot break existing apps. This method 704 * is useful since it matches what the user can see (obfuscated text or not). 705 * 706 * @return true if the current transformation method is of the password type. 707 */ 708 private boolean hasPasswordTransformationMethod() { 709 return mTextView.getTransformationMethod() instanceof PasswordTransformationMethod; 710 } 711 712 private int getWordStart(int offset) { 713 // FIXME - For this and similar methods we're not doing anything to check if there's 714 // a LocaleSpan in the text, this may be something we should try handling or checking for. 715 int retOffset = getWordIteratorWithText().getBeginning(offset); 716 if (retOffset == BreakIterator.DONE) retOffset = offset; 717 return retOffset; 718 } 719 720 private int getWordEnd(int offset, boolean includePunctuation) { 721 int retOffset = getWordIteratorWithText().getEnd(offset); 722 if (retOffset == BreakIterator.DONE) { 723 retOffset = offset; 724 } else if (includePunctuation) { 725 retOffset = handlePunctuation(retOffset); 726 } 727 return retOffset; 728 } 729 730 private boolean isEndBoundary(int offset) { 731 int thisEnd = getWordEnd(offset, false); 732 return offset == thisEnd; 733 } 734 735 private boolean isStartBoundary(int offset) { 736 int thisStart = getWordStart(offset); 737 return thisStart == offset; 738 } 739 740 private int handlePunctuation(int offset) { 741 // FIXME - Check with UX how repeated ending punctuation should be handled. 742 // FIXME - Check with UX if / how we would handle non sentence ending characters. 743 // FIXME - Consider punctuation in different languages. 744 CharSequence text = mTextView.getText(); 745 if (offset < text.length()) { 746 int c = Character.codePointAt(text, offset); 747 if (c == 0x002e /* period */|| c == 0x003f /* question mark */ 748 || c == 0x0021 /* exclamation mark */) { 749 offset = Character.offsetByCodePoints(text, offset, 1); 750 } 751 } 752 return offset; 753 } 754 755 /** 756 * Adjusts selection to the word under last touch offset. Return true if the operation was 757 * successfully performed. 758 */ 759 private boolean selectCurrentWord() { 760 if (!canSelectText()) { 761 return false; 762 } 763 764 if (hasPasswordTransformationMethod()) { 765 // Always select all on a password field. 766 // Cut/copy menu entries are not available for passwords, but being able to select all 767 // is however useful to delete or paste to replace the entire content. 768 return mTextView.selectAllText(); 769 } 770 771 int inputType = mTextView.getInputType(); 772 int klass = inputType & InputType.TYPE_MASK_CLASS; 773 int variation = inputType & InputType.TYPE_MASK_VARIATION; 774 775 // Specific text field types: select the entire text for these 776 if (klass == InputType.TYPE_CLASS_NUMBER || 777 klass == InputType.TYPE_CLASS_PHONE || 778 klass == InputType.TYPE_CLASS_DATETIME || 779 variation == InputType.TYPE_TEXT_VARIATION_URI || 780 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 781 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 782 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 783 return mTextView.selectAllText(); 784 } 785 786 long lastTouchOffsets = getLastTouchOffsets(); 787 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 788 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 789 790 // Safety check in case standard touch event handling has been bypassed 791 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 792 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 793 794 int selectionStart, selectionEnd; 795 796 // If a URLSpan (web address, email, phone...) is found at that position, select it. 797 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 798 getSpans(minOffset, maxOffset, URLSpan.class); 799 if (urlSpans.length >= 1) { 800 URLSpan urlSpan = urlSpans[0]; 801 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 802 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 803 } else { 804 // FIXME - We should check if there's a LocaleSpan in the text, this may be 805 // something we should try handling or checking for. 806 final WordIterator wordIterator = getWordIterator(); 807 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 808 809 selectionStart = wordIterator.getBeginning(minOffset); 810 selectionEnd = wordIterator.getEnd(maxOffset); 811 812 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 813 selectionStart == selectionEnd) { 814 // Possible when the word iterator does not properly handle the text's language 815 long range = getCharRange(minOffset); 816 selectionStart = TextUtils.unpackRangeStartFromLong(range); 817 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 818 } 819 } 820 821 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 822 return selectionEnd > selectionStart; 823 } 824 825 void onLocaleChanged() { 826 // Will be re-created on demand in getWordIterator with the proper new locale 827 mWordIterator = null; 828 mWordIteratorWithText = null; 829 } 830 831 /** 832 * @hide 833 */ 834 public WordIterator getWordIterator() { 835 if (mWordIterator == null) { 836 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 837 } 838 return mWordIterator; 839 } 840 841 private WordIterator getWordIteratorWithText() { 842 if (mWordIteratorWithText == null) { 843 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 844 mUpdateWordIteratorText = true; 845 } 846 if (mUpdateWordIteratorText) { 847 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 848 // to the user's selection is needed. A possible solution would be to 849 // copy some number N of characters near the selection and then when the 850 // user approaches N then we'd do another copy of the next N characters. 851 CharSequence text = mTextView.getText(); 852 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 853 mUpdateWordIteratorText = false; 854 } 855 return mWordIteratorWithText; 856 } 857 858 private long getCharRange(int offset) { 859 final int textLength = mTextView.getText().length(); 860 if (offset + 1 < textLength) { 861 final char currentChar = mTextView.getText().charAt(offset); 862 final char nextChar = mTextView.getText().charAt(offset + 1); 863 if (Character.isSurrogatePair(currentChar, nextChar)) { 864 return TextUtils.packRangeInLong(offset, offset + 2); 865 } 866 } 867 if (offset < textLength) { 868 return TextUtils.packRangeInLong(offset, offset + 1); 869 } 870 if (offset - 2 >= 0) { 871 final char previousChar = mTextView.getText().charAt(offset - 1); 872 final char previousPreviousChar = mTextView.getText().charAt(offset - 2); 873 if (Character.isSurrogatePair(previousPreviousChar, previousChar)) { 874 return TextUtils.packRangeInLong(offset - 2, offset); 875 } 876 } 877 if (offset - 1 >= 0) { 878 return TextUtils.packRangeInLong(offset - 1, offset); 879 } 880 return TextUtils.packRangeInLong(offset, offset); 881 } 882 883 private boolean touchPositionIsInSelection() { 884 int selectionStart = mTextView.getSelectionStart(); 885 int selectionEnd = mTextView.getSelectionEnd(); 886 887 if (selectionStart == selectionEnd) { 888 return false; 889 } 890 891 if (selectionStart > selectionEnd) { 892 int tmp = selectionStart; 893 selectionStart = selectionEnd; 894 selectionEnd = tmp; 895 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 896 } 897 898 SelectionModifierCursorController selectionController = getSelectionController(); 899 int minOffset = selectionController.getMinTouchOffset(); 900 int maxOffset = selectionController.getMaxTouchOffset(); 901 902 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 903 } 904 905 private PositionListener getPositionListener() { 906 if (mPositionListener == null) { 907 mPositionListener = new PositionListener(); 908 } 909 return mPositionListener; 910 } 911 912 private interface TextViewPositionListener { 913 public void updatePosition(int parentPositionX, int parentPositionY, 914 boolean parentPositionChanged, boolean parentScrolled); 915 } 916 917 private boolean isPositionVisible(final float positionX, final float positionY) { 918 synchronized (TEMP_POSITION) { 919 final float[] position = TEMP_POSITION; 920 position[0] = positionX; 921 position[1] = positionY; 922 View view = mTextView; 923 924 while (view != null) { 925 if (view != mTextView) { 926 // Local scroll is already taken into account in positionX/Y 927 position[0] -= view.getScrollX(); 928 position[1] -= view.getScrollY(); 929 } 930 931 if (position[0] < 0 || position[1] < 0 || 932 position[0] > view.getWidth() || position[1] > view.getHeight()) { 933 return false; 934 } 935 936 if (!view.getMatrix().isIdentity()) { 937 view.getMatrix().mapPoints(position); 938 } 939 940 position[0] += view.getLeft(); 941 position[1] += view.getTop(); 942 943 final ViewParent parent = view.getParent(); 944 if (parent instanceof View) { 945 view = (View) parent; 946 } else { 947 // We've reached the ViewRoot, stop iterating 948 view = null; 949 } 950 } 951 } 952 953 // We've been able to walk up the view hierarchy and the position was never clipped 954 return true; 955 } 956 957 private boolean isOffsetVisible(int offset) { 958 Layout layout = mTextView.getLayout(); 959 if (layout == null) return false; 960 961 final int line = layout.getLineForOffset(offset); 962 final int lineBottom = layout.getLineBottom(line); 963 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 964 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 965 lineBottom + mTextView.viewportToContentVerticalOffset()); 966 } 967 968 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 969 * in the view. Returns false when the position is in the empty space of left/right of text. 970 */ 971 private boolean isPositionOnText(float x, float y) { 972 Layout layout = mTextView.getLayout(); 973 if (layout == null) return false; 974 975 final int line = mTextView.getLineAtCoordinate(y); 976 x = mTextView.convertToLocalHorizontalCoordinate(x); 977 978 if (x < layout.getLineLeft(line)) return false; 979 if (x > layout.getLineRight(line)) return false; 980 return true; 981 } 982 983 public boolean performLongClick(boolean handled) { 984 // Long press in empty space moves cursor and starts the selection action mode. 985 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 986 mInsertionControllerEnabled) { 987 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 988 mLastDownPositionY); 989 stopSelectionActionMode(); 990 Selection.setSelection((Spannable) mTextView.getText(), offset); 991 getInsertionController().show(); 992 startSelectionActionModeWithoutSelection(); 993 handled = true; 994 } 995 996 if (!handled && mSelectionActionMode != null) { 997 if (touchPositionIsInSelection()) { 998 // Start a drag 999 final int start = mTextView.getSelectionStart(); 1000 final int end = mTextView.getSelectionEnd(); 1001 CharSequence selectedText = mTextView.getTransformedText(start, end); 1002 ClipData data = ClipData.newPlainText(null, selectedText); 1003 DragLocalState localState = new DragLocalState(mTextView, start, end); 1004 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 1005 View.DRAG_FLAG_GLOBAL); 1006 stopSelectionActionMode(); 1007 } else { 1008 stopSelectionActionMode(); 1009 startSelectionActionModeWithSelectionAndStartDrag(); 1010 } 1011 handled = true; 1012 } 1013 1014 // Start a new selection 1015 if (!handled) { 1016 handled = startSelectionActionModeWithSelectionAndStartDrag(); 1017 } 1018 1019 return handled; 1020 } 1021 1022 private long getLastTouchOffsets() { 1023 SelectionModifierCursorController selectionController = getSelectionController(); 1024 final int minOffset = selectionController.getMinTouchOffset(); 1025 final int maxOffset = selectionController.getMaxTouchOffset(); 1026 return TextUtils.packRangeInLong(minOffset, maxOffset); 1027 } 1028 1029 void onFocusChanged(boolean focused, int direction) { 1030 mShowCursor = SystemClock.uptimeMillis(); 1031 ensureEndedBatchEdit(); 1032 1033 if (focused) { 1034 int selStart = mTextView.getSelectionStart(); 1035 int selEnd = mTextView.getSelectionEnd(); 1036 1037 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1038 // mode for these, unless there was a specific selection already started. 1039 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1040 selEnd == mTextView.getText().length(); 1041 1042 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1043 !isFocusHighlighted; 1044 1045 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1046 // If a tap was used to give focus to that view, move cursor at tap position. 1047 // Has to be done before onTakeFocus, which can be overloaded. 1048 final int lastTapPosition = getLastTapPosition(); 1049 if (lastTapPosition >= 0) { 1050 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1051 } 1052 1053 // Note this may have to be moved out of the Editor class 1054 MovementMethod mMovement = mTextView.getMovementMethod(); 1055 if (mMovement != null) { 1056 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1057 } 1058 1059 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1060 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1061 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1062 // This special case ensure that we keep current selection in that case. 1063 // It would be better to know why the DecorView does not have focus at that time. 1064 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1065 selStart >= 0 && selEnd >= 0) { 1066 /* 1067 * Someone intentionally set the selection, so let them 1068 * do whatever it is that they wanted to do instead of 1069 * the default on-focus behavior. We reset the selection 1070 * here instead of just skipping the onTakeFocus() call 1071 * because some movement methods do something other than 1072 * just setting the selection in theirs and we still 1073 * need to go through that path. 1074 */ 1075 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1076 } 1077 1078 if (mSelectAllOnFocus) { 1079 mTextView.selectAllText(); 1080 } 1081 1082 mTouchFocusSelected = true; 1083 } 1084 1085 mFrozenWithFocus = false; 1086 mSelectionMoved = false; 1087 1088 if (mError != null) { 1089 showError(); 1090 } 1091 1092 makeBlink(); 1093 } else { 1094 if (mError != null) { 1095 hideError(); 1096 } 1097 // Don't leave us in the middle of a batch edit. 1098 mTextView.onEndBatchEdit(); 1099 1100 if (mTextView instanceof ExtractEditText) { 1101 // terminateTextSelectionMode removes selection, which we want to keep when 1102 // ExtractEditText goes out of focus. 1103 final int selStart = mTextView.getSelectionStart(); 1104 final int selEnd = mTextView.getSelectionEnd(); 1105 hideControllers(); 1106 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1107 } else { 1108 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1109 hideControllers(); 1110 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1111 downgradeEasyCorrectionSpans(); 1112 } 1113 1114 // No need to create the controller 1115 if (mSelectionModifierCursorController != null) { 1116 mSelectionModifierCursorController.resetTouchOffsets(); 1117 } 1118 } 1119 } 1120 1121 /** 1122 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1123 * span. 1124 */ 1125 private void downgradeEasyCorrectionSpans() { 1126 CharSequence text = mTextView.getText(); 1127 if (text instanceof Spannable) { 1128 Spannable spannable = (Spannable) text; 1129 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1130 spannable.length(), SuggestionSpan.class); 1131 for (int i = 0; i < suggestionSpans.length; i++) { 1132 int flags = suggestionSpans[i].getFlags(); 1133 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1134 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1135 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1136 suggestionSpans[i].setFlags(flags); 1137 } 1138 } 1139 } 1140 } 1141 1142 void sendOnTextChanged(int start, int after) { 1143 updateSpellCheckSpans(start, start + after, false); 1144 1145 // Flip flag to indicate the word iterator needs to have the text reset. 1146 mUpdateWordIteratorText = true; 1147 1148 // Hide the controllers as soon as text is modified (typing, procedural...) 1149 // We do not hide the span controllers, since they can be added when a new text is 1150 // inserted into the text view (voice IME). 1151 hideCursorControllers(); 1152 } 1153 1154 private int getLastTapPosition() { 1155 // No need to create the controller at that point, no last tap position saved 1156 if (mSelectionModifierCursorController != null) { 1157 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1158 if (lastTapPosition >= 0) { 1159 // Safety check, should not be possible. 1160 if (lastTapPosition > mTextView.getText().length()) { 1161 lastTapPosition = mTextView.getText().length(); 1162 } 1163 return lastTapPosition; 1164 } 1165 } 1166 1167 return -1; 1168 } 1169 1170 void onWindowFocusChanged(boolean hasWindowFocus) { 1171 if (hasWindowFocus) { 1172 if (mBlink != null) { 1173 mBlink.uncancel(); 1174 makeBlink(); 1175 } 1176 } else { 1177 if (mBlink != null) { 1178 mBlink.cancel(); 1179 } 1180 if (mInputContentType != null) { 1181 mInputContentType.enterDown = false; 1182 } 1183 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1184 hideControllers(); 1185 if (mSuggestionsPopupWindow != null) { 1186 mSuggestionsPopupWindow.onParentLostFocus(); 1187 } 1188 1189 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1190 ensureEndedBatchEdit(); 1191 } 1192 } 1193 1194 void onTouchEvent(MotionEvent event) { 1195 if (hasSelectionController()) { 1196 getSelectionController().onTouchEvent(event); 1197 } 1198 1199 if (mShowSuggestionRunnable != null) { 1200 mTextView.removeCallbacks(mShowSuggestionRunnable); 1201 mShowSuggestionRunnable = null; 1202 } 1203 1204 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1205 mLastDownPositionX = event.getX(); 1206 mLastDownPositionY = event.getY(); 1207 1208 // Reset this state; it will be re-set if super.onTouchEvent 1209 // causes focus to move to the view. 1210 mTouchFocusSelected = false; 1211 mIgnoreActionUpEvent = false; 1212 } 1213 } 1214 1215 public void beginBatchEdit() { 1216 mInBatchEditControllers = true; 1217 final InputMethodState ims = mInputMethodState; 1218 if (ims != null) { 1219 int nesting = ++ims.mBatchEditNesting; 1220 if (nesting == 1) { 1221 ims.mCursorChanged = false; 1222 ims.mChangedDelta = 0; 1223 if (ims.mContentChanged) { 1224 // We already have a pending change from somewhere else, 1225 // so turn this into a full update. 1226 ims.mChangedStart = 0; 1227 ims.mChangedEnd = mTextView.getText().length(); 1228 } else { 1229 ims.mChangedStart = EXTRACT_UNKNOWN; 1230 ims.mChangedEnd = EXTRACT_UNKNOWN; 1231 ims.mContentChanged = false; 1232 } 1233 mUndoInputFilter.beginBatchEdit(); 1234 mTextView.onBeginBatchEdit(); 1235 } 1236 } 1237 } 1238 1239 public void endBatchEdit() { 1240 mInBatchEditControllers = false; 1241 final InputMethodState ims = mInputMethodState; 1242 if (ims != null) { 1243 int nesting = --ims.mBatchEditNesting; 1244 if (nesting == 0) { 1245 finishBatchEdit(ims); 1246 } 1247 } 1248 } 1249 1250 void ensureEndedBatchEdit() { 1251 final InputMethodState ims = mInputMethodState; 1252 if (ims != null && ims.mBatchEditNesting != 0) { 1253 ims.mBatchEditNesting = 0; 1254 finishBatchEdit(ims); 1255 } 1256 } 1257 1258 void finishBatchEdit(final InputMethodState ims) { 1259 mTextView.onEndBatchEdit(); 1260 mUndoInputFilter.endBatchEdit(); 1261 1262 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1263 mTextView.updateAfterEdit(); 1264 reportExtractedText(); 1265 } else if (ims.mCursorChanged) { 1266 // Cheesy way to get us to report the current cursor location. 1267 mTextView.invalidateCursor(); 1268 } 1269 // sendUpdateSelection knows to avoid sending if the selection did 1270 // not actually change. 1271 sendUpdateSelection(); 1272 } 1273 1274 static final int EXTRACT_NOTHING = -2; 1275 static final int EXTRACT_UNKNOWN = -1; 1276 1277 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1278 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1279 EXTRACT_UNKNOWN, outText); 1280 } 1281 1282 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1283 int partialStartOffset, int partialEndOffset, int delta, 1284 @Nullable ExtractedText outText) { 1285 if (request == null || outText == null) { 1286 return false; 1287 } 1288 1289 final CharSequence content = mTextView.getText(); 1290 if (content == null) { 1291 return false; 1292 } 1293 1294 if (partialStartOffset != EXTRACT_NOTHING) { 1295 final int N = content.length(); 1296 if (partialStartOffset < 0) { 1297 outText.partialStartOffset = outText.partialEndOffset = -1; 1298 partialStartOffset = 0; 1299 partialEndOffset = N; 1300 } else { 1301 // Now use the delta to determine the actual amount of text 1302 // we need. 1303 partialEndOffset += delta; 1304 // Adjust offsets to ensure we contain full spans. 1305 if (content instanceof Spanned) { 1306 Spanned spanned = (Spanned)content; 1307 Object[] spans = spanned.getSpans(partialStartOffset, 1308 partialEndOffset, ParcelableSpan.class); 1309 int i = spans.length; 1310 while (i > 0) { 1311 i--; 1312 int j = spanned.getSpanStart(spans[i]); 1313 if (j < partialStartOffset) partialStartOffset = j; 1314 j = spanned.getSpanEnd(spans[i]); 1315 if (j > partialEndOffset) partialEndOffset = j; 1316 } 1317 } 1318 outText.partialStartOffset = partialStartOffset; 1319 outText.partialEndOffset = partialEndOffset - delta; 1320 1321 if (partialStartOffset > N) { 1322 partialStartOffset = N; 1323 } else if (partialStartOffset < 0) { 1324 partialStartOffset = 0; 1325 } 1326 if (partialEndOffset > N) { 1327 partialEndOffset = N; 1328 } else if (partialEndOffset < 0) { 1329 partialEndOffset = 0; 1330 } 1331 } 1332 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1333 outText.text = content.subSequence(partialStartOffset, 1334 partialEndOffset); 1335 } else { 1336 outText.text = TextUtils.substring(content, partialStartOffset, 1337 partialEndOffset); 1338 } 1339 } else { 1340 outText.partialStartOffset = 0; 1341 outText.partialEndOffset = 0; 1342 outText.text = ""; 1343 } 1344 outText.flags = 0; 1345 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1346 outText.flags |= ExtractedText.FLAG_SELECTING; 1347 } 1348 if (mTextView.isSingleLine()) { 1349 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1350 } 1351 outText.startOffset = 0; 1352 outText.selectionStart = mTextView.getSelectionStart(); 1353 outText.selectionEnd = mTextView.getSelectionEnd(); 1354 return true; 1355 } 1356 1357 boolean reportExtractedText() { 1358 final Editor.InputMethodState ims = mInputMethodState; 1359 if (ims != null) { 1360 final boolean contentChanged = ims.mContentChanged; 1361 if (contentChanged || ims.mSelectionModeChanged) { 1362 ims.mContentChanged = false; 1363 ims.mSelectionModeChanged = false; 1364 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1365 if (req != null) { 1366 InputMethodManager imm = InputMethodManager.peekInstance(); 1367 if (imm != null) { 1368 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1369 "Retrieving extracted start=" + ims.mChangedStart + 1370 " end=" + ims.mChangedEnd + 1371 " delta=" + ims.mChangedDelta); 1372 if (ims.mChangedStart < 0 && !contentChanged) { 1373 ims.mChangedStart = EXTRACT_NOTHING; 1374 } 1375 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1376 ims.mChangedDelta, ims.mExtractedText)) { 1377 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1378 "Reporting extracted start=" + 1379 ims.mExtractedText.partialStartOffset + 1380 " end=" + ims.mExtractedText.partialEndOffset + 1381 ": " + ims.mExtractedText.text); 1382 1383 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1384 ims.mChangedStart = EXTRACT_UNKNOWN; 1385 ims.mChangedEnd = EXTRACT_UNKNOWN; 1386 ims.mChangedDelta = 0; 1387 ims.mContentChanged = false; 1388 return true; 1389 } 1390 } 1391 } 1392 } 1393 } 1394 return false; 1395 } 1396 1397 private void sendUpdateSelection() { 1398 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1399 final InputMethodManager imm = InputMethodManager.peekInstance(); 1400 if (null != imm) { 1401 final int selectionStart = mTextView.getSelectionStart(); 1402 final int selectionEnd = mTextView.getSelectionEnd(); 1403 int candStart = -1; 1404 int candEnd = -1; 1405 if (mTextView.getText() instanceof Spannable) { 1406 final Spannable sp = (Spannable) mTextView.getText(); 1407 candStart = EditableInputConnection.getComposingSpanStart(sp); 1408 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1409 } 1410 // InputMethodManager#updateSelection skips sending the message if 1411 // none of the parameters have changed since the last time we called it. 1412 imm.updateSelection(mTextView, 1413 selectionStart, selectionEnd, candStart, candEnd); 1414 } 1415 } 1416 } 1417 1418 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1419 int cursorOffsetVertical) { 1420 final int selectionStart = mTextView.getSelectionStart(); 1421 final int selectionEnd = mTextView.getSelectionEnd(); 1422 1423 final InputMethodState ims = mInputMethodState; 1424 if (ims != null && ims.mBatchEditNesting == 0) { 1425 InputMethodManager imm = InputMethodManager.peekInstance(); 1426 if (imm != null) { 1427 if (imm.isActive(mTextView)) { 1428 boolean reported = false; 1429 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1430 // We are in extract mode and the content has changed 1431 // in some way... just report complete new text to the 1432 // input method. 1433 reported = reportExtractedText(); 1434 } 1435 } 1436 } 1437 } 1438 1439 if (mCorrectionHighlighter != null) { 1440 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1441 } 1442 1443 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1444 drawCursor(canvas, cursorOffsetVertical); 1445 // Rely on the drawable entirely, do not draw the cursor line. 1446 // Has to be done after the IMM related code above which relies on the highlight. 1447 highlight = null; 1448 } 1449 1450 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1451 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1452 cursorOffsetVertical); 1453 } else { 1454 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1455 } 1456 } 1457 1458 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1459 Paint highlightPaint, int cursorOffsetVertical) { 1460 final long lineRange = layout.getLineRangeForDraw(canvas); 1461 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1462 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1463 if (lastLine < 0) return; 1464 1465 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1466 firstLine, lastLine); 1467 1468 if (layout instanceof DynamicLayout) { 1469 if (mTextRenderNodes == null) { 1470 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1471 } 1472 1473 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1474 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1475 int[] blockIndices = dynamicLayout.getBlockIndices(); 1476 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1477 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1478 1479 int endOfPreviousBlock = -1; 1480 int searchStartIndex = 0; 1481 for (int i = 0; i < numberOfBlocks; i++) { 1482 int blockEndLine = blockEndLines[i]; 1483 int blockIndex = blockIndices[i]; 1484 1485 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1486 if (blockIsInvalid) { 1487 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1488 searchStartIndex); 1489 // Note how dynamic layout's internal block indices get updated from Editor 1490 blockIndices[i] = blockIndex; 1491 if (mTextRenderNodes[blockIndex] != null) { 1492 mTextRenderNodes[blockIndex].isDirty = true; 1493 } 1494 searchStartIndex = blockIndex + 1; 1495 } 1496 1497 if (mTextRenderNodes[blockIndex] == null) { 1498 mTextRenderNodes[blockIndex] = 1499 new TextRenderNode("Text " + blockIndex); 1500 } 1501 1502 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1503 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1504 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1505 final int blockBeginLine = endOfPreviousBlock + 1; 1506 final int top = layout.getLineTop(blockBeginLine); 1507 final int bottom = layout.getLineBottom(blockEndLine); 1508 int left = 0; 1509 int right = mTextView.getWidth(); 1510 if (mTextView.getHorizontallyScrolling()) { 1511 float min = Float.MAX_VALUE; 1512 float max = Float.MIN_VALUE; 1513 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1514 min = Math.min(min, layout.getLineLeft(line)); 1515 max = Math.max(max, layout.getLineRight(line)); 1516 } 1517 left = (int) min; 1518 right = (int) (max + 0.5f); 1519 } 1520 1521 // Rebuild display list if it is invalid 1522 if (blockDisplayListIsInvalid) { 1523 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1524 right - left, bottom - top); 1525 try { 1526 // drawText is always relative to TextView's origin, this translation 1527 // brings this range of text back to the top left corner of the viewport 1528 displayListCanvas.translate(-left, -top); 1529 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1530 mTextRenderNodes[blockIndex].isDirty = false; 1531 // No need to untranslate, previous context is popped after 1532 // drawDisplayList 1533 } finally { 1534 blockDisplayList.end(displayListCanvas); 1535 // Same as drawDisplayList below, handled by our TextView's parent 1536 blockDisplayList.setClipToBounds(false); 1537 } 1538 } 1539 1540 // Valid disply list whose index is >= indexFirstChangedBlock 1541 // only needs to update its drawing location. 1542 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1543 } 1544 1545 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1546 1547 endOfPreviousBlock = blockEndLine; 1548 } 1549 1550 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1551 } else { 1552 // Boring layout is used for empty and hint text 1553 layout.drawText(canvas, firstLine, lastLine); 1554 } 1555 } 1556 1557 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1558 int searchStartIndex) { 1559 int length = mTextRenderNodes.length; 1560 for (int i = searchStartIndex; i < length; i++) { 1561 boolean blockIndexFound = false; 1562 for (int j = 0; j < numberOfBlocks; j++) { 1563 if (blockIndices[j] == i) { 1564 blockIndexFound = true; 1565 break; 1566 } 1567 } 1568 if (blockIndexFound) continue; 1569 return i; 1570 } 1571 1572 // No available index found, the pool has to grow 1573 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1574 return length; 1575 } 1576 1577 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1578 final boolean translate = cursorOffsetVertical != 0; 1579 if (translate) canvas.translate(0, cursorOffsetVertical); 1580 for (int i = 0; i < mCursorCount; i++) { 1581 mCursorDrawable[i].draw(canvas); 1582 } 1583 if (translate) canvas.translate(0, -cursorOffsetVertical); 1584 } 1585 1586 /** 1587 * Invalidates all the sub-display lists that overlap the specified character range 1588 */ 1589 void invalidateTextDisplayList(Layout layout, int start, int end) { 1590 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1591 final int firstLine = layout.getLineForOffset(start); 1592 final int lastLine = layout.getLineForOffset(end); 1593 1594 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1595 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1596 int[] blockIndices = dynamicLayout.getBlockIndices(); 1597 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1598 1599 int i = 0; 1600 // Skip the blocks before firstLine 1601 while (i < numberOfBlocks) { 1602 if (blockEndLines[i] >= firstLine) break; 1603 i++; 1604 } 1605 1606 // Invalidate all subsequent blocks until lastLine is passed 1607 while (i < numberOfBlocks) { 1608 final int blockIndex = blockIndices[i]; 1609 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1610 mTextRenderNodes[blockIndex].isDirty = true; 1611 } 1612 if (blockEndLines[i] >= lastLine) break; 1613 i++; 1614 } 1615 } 1616 } 1617 1618 void invalidateTextDisplayList() { 1619 if (mTextRenderNodes != null) { 1620 for (int i = 0; i < mTextRenderNodes.length; i++) { 1621 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1622 } 1623 } 1624 } 1625 1626 void updateCursorsPositions() { 1627 if (mTextView.mCursorDrawableRes == 0) { 1628 mCursorCount = 0; 1629 return; 1630 } 1631 1632 Layout layout = mTextView.getLayout(); 1633 Layout hintLayout = mTextView.getHintLayout(); 1634 final int offset = mTextView.getSelectionStart(); 1635 final int line = layout.getLineForOffset(offset); 1636 final int top = layout.getLineTop(line); 1637 final int bottom = layout.getLineTop(line + 1); 1638 1639 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1640 1641 int middle = bottom; 1642 if (mCursorCount == 2) { 1643 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1644 middle = (top + bottom) >> 1; 1645 } 1646 1647 boolean clamped = layout.shouldClampCursor(line); 1648 updateCursorPosition(0, top, middle, 1649 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1650 1651 if (mCursorCount == 2) { 1652 updateCursorPosition(1, middle, bottom, 1653 layout.getSecondaryHorizontal(offset, clamped)); 1654 } 1655 } 1656 1657 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1658 boolean clamped) { 1659 if (TextUtils.isEmpty(layout.getText()) && 1660 hintLayout != null && 1661 !TextUtils.isEmpty(hintLayout.getText())) { 1662 return hintLayout.getPrimaryHorizontal(offset, clamped); 1663 } else { 1664 return layout.getPrimaryHorizontal(offset, clamped); 1665 } 1666 } 1667 1668 /** 1669 * @return true if the selection mode was actually started. 1670 */ 1671 private boolean startSelectionActionModeWithoutSelection() { 1672 if (mSelectionActionMode != null) { 1673 // Selection action mode is already started 1674 // TODO: revisit invocations to minimize this case. 1675 mSelectionActionMode.invalidate(); 1676 return false; 1677 } 1678 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1679 mSelectionActionMode = mTextView.startActionMode( 1680 actionModeCallback, ActionMode.TYPE_FLOATING); 1681 return mSelectionActionMode != null; 1682 } 1683 1684 /** 1685 * Starts a Selection Action Mode with the current selection and enters drag mode. This should 1686 * be used whenever the mode is started from a touch event. 1687 * 1688 * @return true if the selection mode was actually started. 1689 */ 1690 private boolean startSelectionActionModeWithSelectionAndStartDrag() { 1691 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1692 if (selectionStarted) { 1693 getSelectionController().enterDrag(); 1694 } 1695 return selectionStarted; 1696 } 1697 1698 /** 1699 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1700 * are shown. This should be used when the mode is started from a non-touch event. 1701 * 1702 * @return true if the selection mode was actually started. 1703 */ 1704 boolean startSelectionActionModeWithSelection() { 1705 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1706 if (selectionStarted) { 1707 getSelectionController().show(); 1708 } 1709 return selectionStarted; 1710 } 1711 1712 private boolean startSelectionActionModeWithSelectionInternal() { 1713 if (mSelectionActionMode != null) { 1714 // Selection action mode is already started 1715 mSelectionActionMode.invalidate(); 1716 return false; 1717 } 1718 1719 if (!canSelectText() || !mTextView.requestFocus()) { 1720 Log.w(TextView.LOG_TAG, 1721 "TextView does not support text selection. Action mode cancelled."); 1722 return false; 1723 } 1724 1725 if (!mTextView.hasSelection()) { 1726 // There may already be a selection on device rotation 1727 if (!selectCurrentWord()) { 1728 // No word found under cursor or text selection not permitted. 1729 return false; 1730 } 1731 } 1732 1733 boolean willExtract = extractedTextModeWillBeStarted(); 1734 1735 // Do not start the action mode when extracted text will show up full screen, which would 1736 // immediately hide the newly created action bar and would be visually distracting. 1737 if (!willExtract) { 1738 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1739 mSelectionActionMode = mTextView.startActionMode( 1740 actionModeCallback, ActionMode.TYPE_FLOATING); 1741 } 1742 1743 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1744 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1745 // Show the IME to be able to replace text, except when selecting non editable text. 1746 final InputMethodManager imm = InputMethodManager.peekInstance(); 1747 if (imm != null) { 1748 imm.showSoftInput(mTextView, 0, null); 1749 } 1750 } 1751 return selectionStarted; 1752 } 1753 1754 private boolean extractedTextModeWillBeStarted() { 1755 if (!(mTextView instanceof ExtractEditText)) { 1756 final InputMethodManager imm = InputMethodManager.peekInstance(); 1757 return imm != null && imm.isFullscreenMode(); 1758 } 1759 return false; 1760 } 1761 1762 /** 1763 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1764 * the current cursor position or selection range. This method is consistent with the 1765 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1766 */ 1767 private boolean shouldOfferToShowSuggestions() { 1768 CharSequence text = mTextView.getText(); 1769 if (!(text instanceof Spannable)) return false; 1770 1771 final Spannable spannable = (Spannable) text; 1772 final int selectionStart = mTextView.getSelectionStart(); 1773 final int selectionEnd = mTextView.getSelectionEnd(); 1774 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1775 SuggestionSpan.class); 1776 if (suggestionSpans.length == 0) { 1777 return false; 1778 } 1779 if (selectionStart == selectionEnd) { 1780 // Spans overlap the cursor. 1781 return true; 1782 } 1783 int minSpanStart = mTextView.getText().length(); 1784 int maxSpanEnd = 0; 1785 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1786 int unionOfSpansCoveringSelectionStartEnd = 0; 1787 for (int i = 0; i < suggestionSpans.length; i++) { 1788 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1789 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1790 minSpanStart = Math.min(minSpanStart, spanStart); 1791 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1792 if (selectionStart < spanStart || selectionStart > spanEnd) { 1793 // The span doesn't cover the current selection start point. 1794 continue; 1795 } 1796 unionOfSpansCoveringSelectionStartStart = 1797 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1798 unionOfSpansCoveringSelectionStartEnd = 1799 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1800 } 1801 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1802 // No spans cover the selection start point. 1803 return false; 1804 } 1805 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1806 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1807 // There is a span that is not covered by the union. In this case, we soouldn't offer 1808 // to show suggestions as it's confusing. 1809 return false; 1810 } 1811 return true; 1812 } 1813 1814 /** 1815 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1816 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1817 */ 1818 private boolean isCursorInsideEasyCorrectionSpan() { 1819 Spannable spannable = (Spannable) mTextView.getText(); 1820 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1821 mTextView.getSelectionEnd(), SuggestionSpan.class); 1822 for (int i = 0; i < suggestionSpans.length; i++) { 1823 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1824 return true; 1825 } 1826 } 1827 return false; 1828 } 1829 1830 void onTouchUpEvent(MotionEvent event) { 1831 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1832 hideControllers(); 1833 CharSequence text = mTextView.getText(); 1834 if (!selectAllGotFocus && text.length() > 0) { 1835 // Move cursor 1836 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1837 Selection.setSelection((Spannable) text, offset); 1838 if (mSpellChecker != null) { 1839 // When the cursor moves, the word that was typed may need spell check 1840 mSpellChecker.onSelectionChanged(); 1841 } 1842 if (!extractedTextModeWillBeStarted()) { 1843 if (isCursorInsideEasyCorrectionSpan()) { 1844 mShowSuggestionRunnable = new Runnable() { 1845 public void run() { 1846 showSuggestions(); 1847 } 1848 }; 1849 // removeCallbacks is performed on every touch 1850 mTextView.postDelayed(mShowSuggestionRunnable, 1851 ViewConfiguration.getDoubleTapTimeout()); 1852 } else if (hasInsertionController()) { 1853 getInsertionController().show(); 1854 } 1855 } 1856 } 1857 } 1858 1859 protected void stopSelectionActionMode() { 1860 if (mSelectionActionMode != null) { 1861 // This will hide the mSelectionModifierCursorController 1862 mSelectionActionMode.finish(); 1863 } 1864 } 1865 1866 /** 1867 * @return True if this view supports insertion handles. 1868 */ 1869 boolean hasInsertionController() { 1870 return mInsertionControllerEnabled; 1871 } 1872 1873 /** 1874 * @return True if this view supports selection handles. 1875 */ 1876 boolean hasSelectionController() { 1877 return mSelectionControllerEnabled; 1878 } 1879 1880 InsertionPointCursorController getInsertionController() { 1881 if (!mInsertionControllerEnabled) { 1882 return null; 1883 } 1884 1885 if (mInsertionPointCursorController == null) { 1886 mInsertionPointCursorController = new InsertionPointCursorController(); 1887 1888 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1889 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1890 } 1891 1892 return mInsertionPointCursorController; 1893 } 1894 1895 SelectionModifierCursorController getSelectionController() { 1896 if (!mSelectionControllerEnabled) { 1897 return null; 1898 } 1899 1900 if (mSelectionModifierCursorController == null) { 1901 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1902 1903 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1904 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1905 } 1906 1907 return mSelectionModifierCursorController; 1908 } 1909 1910 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1911 if (mCursorDrawable[cursorIndex] == null) 1912 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1913 mTextView.mCursorDrawableRes); 1914 1915 if (mTempRect == null) mTempRect = new Rect(); 1916 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1917 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1918 horizontal = Math.max(0.5f, horizontal - 0.5f); 1919 final int left = (int) (horizontal) - mTempRect.left; 1920 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1921 bottom + mTempRect.bottom); 1922 } 1923 1924 /** 1925 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1926 * a dictionary) from the current input method, provided by it calling 1927 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1928 * implementation flashes the background of the corrected word to provide feedback to the user. 1929 * 1930 * @param info The auto correct info about the text that was corrected. 1931 */ 1932 public void onCommitCorrection(CorrectionInfo info) { 1933 if (mCorrectionHighlighter == null) { 1934 mCorrectionHighlighter = new CorrectionHighlighter(); 1935 } else { 1936 mCorrectionHighlighter.invalidate(false); 1937 } 1938 1939 mCorrectionHighlighter.highlight(info); 1940 } 1941 1942 void showSuggestions() { 1943 if (mSuggestionsPopupWindow == null) { 1944 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1945 } 1946 hideControllers(); 1947 mSuggestionsPopupWindow.show(); 1948 } 1949 1950 boolean areSuggestionsShown() { 1951 return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing(); 1952 } 1953 1954 void onScrollChanged() { 1955 if (mPositionListener != null) { 1956 mPositionListener.onScrollChanged(); 1957 } 1958 if (mSelectionActionMode != null) { 1959 mSelectionActionMode.invalidateContentRect(); 1960 } 1961 } 1962 1963 /** 1964 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1965 */ 1966 private boolean shouldBlink() { 1967 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1968 1969 final int start = mTextView.getSelectionStart(); 1970 if (start < 0) return false; 1971 1972 final int end = mTextView.getSelectionEnd(); 1973 if (end < 0) return false; 1974 1975 return start == end; 1976 } 1977 1978 void makeBlink() { 1979 if (shouldBlink()) { 1980 mShowCursor = SystemClock.uptimeMillis(); 1981 if (mBlink == null) mBlink = new Blink(); 1982 mBlink.removeCallbacks(mBlink); 1983 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 1984 } else { 1985 if (mBlink != null) mBlink.removeCallbacks(mBlink); 1986 } 1987 } 1988 1989 private class Blink extends Handler implements Runnable { 1990 private boolean mCancelled; 1991 1992 public void run() { 1993 if (mCancelled) { 1994 return; 1995 } 1996 1997 removeCallbacks(Blink.this); 1998 1999 if (shouldBlink()) { 2000 if (mTextView.getLayout() != null) { 2001 mTextView.invalidateCursorPath(); 2002 } 2003 2004 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 2005 } 2006 } 2007 2008 void cancel() { 2009 if (!mCancelled) { 2010 removeCallbacks(Blink.this); 2011 mCancelled = true; 2012 } 2013 } 2014 2015 void uncancel() { 2016 mCancelled = false; 2017 } 2018 } 2019 2020 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 2021 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2022 com.android.internal.R.layout.text_drag_thumbnail, null); 2023 2024 if (shadowView == null) { 2025 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2026 } 2027 2028 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2029 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2030 } 2031 shadowView.setText(text); 2032 shadowView.setTextColor(mTextView.getTextColors()); 2033 2034 shadowView.setTextAppearance(mTextView.getContext(), R.styleable.Theme_textAppearanceLarge); 2035 shadowView.setGravity(Gravity.CENTER); 2036 2037 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2038 ViewGroup.LayoutParams.WRAP_CONTENT)); 2039 2040 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2041 shadowView.measure(size, size); 2042 2043 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2044 shadowView.invalidate(); 2045 return new DragShadowBuilder(shadowView); 2046 } 2047 2048 private static class DragLocalState { 2049 public TextView sourceTextView; 2050 public int start, end; 2051 2052 public DragLocalState(TextView sourceTextView, int start, int end) { 2053 this.sourceTextView = sourceTextView; 2054 this.start = start; 2055 this.end = end; 2056 } 2057 } 2058 2059 void onDrop(DragEvent event) { 2060 StringBuilder content = new StringBuilder(""); 2061 ClipData clipData = event.getClipData(); 2062 final int itemCount = clipData.getItemCount(); 2063 for (int i=0; i < itemCount; i++) { 2064 Item item = clipData.getItemAt(i); 2065 content.append(item.coerceToStyledText(mTextView.getContext())); 2066 } 2067 2068 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2069 2070 Object localState = event.getLocalState(); 2071 DragLocalState dragLocalState = null; 2072 if (localState instanceof DragLocalState) { 2073 dragLocalState = (DragLocalState) localState; 2074 } 2075 boolean dragDropIntoItself = dragLocalState != null && 2076 dragLocalState.sourceTextView == mTextView; 2077 2078 if (dragDropIntoItself) { 2079 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2080 // A drop inside the original selection discards the drop. 2081 return; 2082 } 2083 } 2084 2085 final int originalLength = mTextView.getText().length(); 2086 int min = offset; 2087 int max = offset; 2088 2089 Selection.setSelection((Spannable) mTextView.getText(), max); 2090 mTextView.replaceText_internal(min, max, content); 2091 2092 if (dragDropIntoItself) { 2093 int dragSourceStart = dragLocalState.start; 2094 int dragSourceEnd = dragLocalState.end; 2095 if (max <= dragSourceStart) { 2096 // Inserting text before selection has shifted positions 2097 final int shift = mTextView.getText().length() - originalLength; 2098 dragSourceStart += shift; 2099 dragSourceEnd += shift; 2100 } 2101 2102 // Delete original selection 2103 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2104 2105 // Make sure we do not leave two adjacent spaces. 2106 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2107 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2108 if (nextCharIdx > prevCharIdx + 1) { 2109 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2110 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2111 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2112 } 2113 } 2114 } 2115 } 2116 2117 public void addSpanWatchers(Spannable text) { 2118 final int textLength = text.length(); 2119 2120 if (mKeyListener != null) { 2121 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2122 } 2123 2124 if (mSpanController == null) { 2125 mSpanController = new SpanController(); 2126 } 2127 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2128 } 2129 2130 /** 2131 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2132 * pop-up should be displayed. 2133 * Also monitors {@link Selection} to call back to the attached input method. 2134 */ 2135 class SpanController implements SpanWatcher { 2136 2137 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2138 2139 private EasyEditPopupWindow mPopupWindow; 2140 2141 private Runnable mHidePopup; 2142 2143 // This function is pure but inner classes can't have static functions 2144 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2145 final Object span) { 2146 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2147 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2148 } 2149 2150 @Override 2151 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2152 if (isNonIntermediateSelectionSpan(text, span)) { 2153 sendUpdateSelection(); 2154 } else if (span instanceof EasyEditSpan) { 2155 if (mPopupWindow == null) { 2156 mPopupWindow = new EasyEditPopupWindow(); 2157 mHidePopup = new Runnable() { 2158 @Override 2159 public void run() { 2160 hide(); 2161 } 2162 }; 2163 } 2164 2165 // Make sure there is only at most one EasyEditSpan in the text 2166 if (mPopupWindow.mEasyEditSpan != null) { 2167 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2168 } 2169 2170 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2171 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2172 @Override 2173 public void onDeleteClick(EasyEditSpan span) { 2174 Editable editable = (Editable) mTextView.getText(); 2175 int start = editable.getSpanStart(span); 2176 int end = editable.getSpanEnd(span); 2177 if (start >= 0 && end >= 0) { 2178 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2179 mTextView.deleteText_internal(start, end); 2180 } 2181 editable.removeSpan(span); 2182 } 2183 }); 2184 2185 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2186 // The window is not visible yet, ignore the text change. 2187 return; 2188 } 2189 2190 if (mTextView.getLayout() == null) { 2191 // The view has not been laid out yet, ignore the text change 2192 return; 2193 } 2194 2195 if (extractedTextModeWillBeStarted()) { 2196 // The input is in extract mode. Do not handle the easy edit in 2197 // the original TextView, as the ExtractEditText will do 2198 return; 2199 } 2200 2201 mPopupWindow.show(); 2202 mTextView.removeCallbacks(mHidePopup); 2203 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2204 } 2205 } 2206 2207 @Override 2208 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2209 if (isNonIntermediateSelectionSpan(text, span)) { 2210 sendUpdateSelection(); 2211 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2212 hide(); 2213 } 2214 } 2215 2216 @Override 2217 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2218 int newStart, int newEnd) { 2219 if (isNonIntermediateSelectionSpan(text, span)) { 2220 sendUpdateSelection(); 2221 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2222 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2223 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2224 text.removeSpan(easyEditSpan); 2225 } 2226 } 2227 2228 public void hide() { 2229 if (mPopupWindow != null) { 2230 mPopupWindow.hide(); 2231 mTextView.removeCallbacks(mHidePopup); 2232 } 2233 } 2234 2235 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2236 try { 2237 PendingIntent pendingIntent = span.getPendingIntent(); 2238 if (pendingIntent != null) { 2239 Intent intent = new Intent(); 2240 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2241 pendingIntent.send(mTextView.getContext(), 0, intent); 2242 } 2243 } catch (CanceledException e) { 2244 // This should not happen, as we should try to send the intent only once. 2245 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2246 } 2247 } 2248 } 2249 2250 /** 2251 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2252 */ 2253 private interface EasyEditDeleteListener { 2254 2255 /** 2256 * Clicks the delete pop-up. 2257 */ 2258 void onDeleteClick(EasyEditSpan span); 2259 } 2260 2261 /** 2262 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2263 * by {@link SpanController}. 2264 */ 2265 private class EasyEditPopupWindow extends PinnedPopupWindow 2266 implements OnClickListener { 2267 private static final int POPUP_TEXT_LAYOUT = 2268 com.android.internal.R.layout.text_edit_action_popup_text; 2269 private TextView mDeleteTextView; 2270 private EasyEditSpan mEasyEditSpan; 2271 private EasyEditDeleteListener mOnDeleteListener; 2272 2273 @Override 2274 protected void createPopupWindow() { 2275 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2276 com.android.internal.R.attr.textSelectHandleWindowStyle); 2277 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2278 mPopupWindow.setClippingEnabled(true); 2279 } 2280 2281 @Override 2282 protected void initContentView() { 2283 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2284 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2285 mContentView = linearLayout; 2286 mContentView.setBackgroundResource( 2287 com.android.internal.R.drawable.text_edit_side_paste_window); 2288 2289 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2290 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2291 2292 LayoutParams wrapContent = new LayoutParams( 2293 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2294 2295 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2296 mDeleteTextView.setLayoutParams(wrapContent); 2297 mDeleteTextView.setText(com.android.internal.R.string.delete); 2298 mDeleteTextView.setOnClickListener(this); 2299 mContentView.addView(mDeleteTextView); 2300 } 2301 2302 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2303 mEasyEditSpan = easyEditSpan; 2304 } 2305 2306 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2307 mOnDeleteListener = listener; 2308 } 2309 2310 @Override 2311 public void onClick(View view) { 2312 if (view == mDeleteTextView 2313 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2314 && mOnDeleteListener != null) { 2315 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2316 } 2317 } 2318 2319 @Override 2320 public void hide() { 2321 if (mEasyEditSpan != null) { 2322 mEasyEditSpan.setDeleteEnabled(false); 2323 } 2324 mOnDeleteListener = null; 2325 super.hide(); 2326 } 2327 2328 @Override 2329 protected int getTextOffset() { 2330 // Place the pop-up at the end of the span 2331 Editable editable = (Editable) mTextView.getText(); 2332 return editable.getSpanEnd(mEasyEditSpan); 2333 } 2334 2335 @Override 2336 protected int getVerticalLocalPosition(int line) { 2337 return mTextView.getLayout().getLineBottom(line); 2338 } 2339 2340 @Override 2341 protected int clipVertically(int positionY) { 2342 // As we display the pop-up below the span, no vertical clipping is required. 2343 return positionY; 2344 } 2345 } 2346 2347 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2348 // 3 handles 2349 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2350 // 1 CursorAnchorInfoNotifier 2351 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2352 private TextViewPositionListener[] mPositionListeners = 2353 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2354 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2355 private boolean mPositionHasChanged = true; 2356 // Absolute position of the TextView with respect to its parent window 2357 private int mPositionX, mPositionY; 2358 private int mNumberOfListeners; 2359 private boolean mScrollHasChanged; 2360 final int[] mTempCoords = new int[2]; 2361 2362 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2363 if (mNumberOfListeners == 0) { 2364 updatePosition(); 2365 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2366 vto.addOnPreDrawListener(this); 2367 } 2368 2369 int emptySlotIndex = -1; 2370 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2371 TextViewPositionListener listener = mPositionListeners[i]; 2372 if (listener == positionListener) { 2373 return; 2374 } else if (emptySlotIndex < 0 && listener == null) { 2375 emptySlotIndex = i; 2376 } 2377 } 2378 2379 mPositionListeners[emptySlotIndex] = positionListener; 2380 mCanMove[emptySlotIndex] = canMove; 2381 mNumberOfListeners++; 2382 } 2383 2384 public void removeSubscriber(TextViewPositionListener positionListener) { 2385 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2386 if (mPositionListeners[i] == positionListener) { 2387 mPositionListeners[i] = null; 2388 mNumberOfListeners--; 2389 break; 2390 } 2391 } 2392 2393 if (mNumberOfListeners == 0) { 2394 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2395 vto.removeOnPreDrawListener(this); 2396 } 2397 } 2398 2399 public int getPositionX() { 2400 return mPositionX; 2401 } 2402 2403 public int getPositionY() { 2404 return mPositionY; 2405 } 2406 2407 @Override 2408 public boolean onPreDraw() { 2409 updatePosition(); 2410 2411 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2412 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2413 TextViewPositionListener positionListener = mPositionListeners[i]; 2414 if (positionListener != null) { 2415 positionListener.updatePosition(mPositionX, mPositionY, 2416 mPositionHasChanged, mScrollHasChanged); 2417 } 2418 } 2419 } 2420 2421 mScrollHasChanged = false; 2422 return true; 2423 } 2424 2425 private void updatePosition() { 2426 mTextView.getLocationInWindow(mTempCoords); 2427 2428 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2429 2430 mPositionX = mTempCoords[0]; 2431 mPositionY = mTempCoords[1]; 2432 } 2433 2434 public void onScrollChanged() { 2435 mScrollHasChanged = true; 2436 } 2437 } 2438 2439 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2440 protected PopupWindow mPopupWindow; 2441 protected ViewGroup mContentView; 2442 int mPositionX, mPositionY; 2443 2444 protected abstract void createPopupWindow(); 2445 protected abstract void initContentView(); 2446 protected abstract int getTextOffset(); 2447 protected abstract int getVerticalLocalPosition(int line); 2448 protected abstract int clipVertically(int positionY); 2449 2450 public PinnedPopupWindow() { 2451 createPopupWindow(); 2452 2453 mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 2454 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2455 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2456 2457 initContentView(); 2458 2459 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2460 ViewGroup.LayoutParams.WRAP_CONTENT); 2461 mContentView.setLayoutParams(wrapContent); 2462 2463 mPopupWindow.setContentView(mContentView); 2464 } 2465 2466 public void show() { 2467 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2468 2469 computeLocalPosition(); 2470 2471 final PositionListener positionListener = getPositionListener(); 2472 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2473 } 2474 2475 protected void measureContent() { 2476 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2477 mContentView.measure( 2478 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2479 View.MeasureSpec.AT_MOST), 2480 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2481 View.MeasureSpec.AT_MOST)); 2482 } 2483 2484 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2485 * positioned according to viewportToContentHorizontalOffset. 2486 * 2487 * This method assumes that mContentView has properly been measured from its content. */ 2488 private void computeLocalPosition() { 2489 measureContent(); 2490 final int width = mContentView.getMeasuredWidth(); 2491 final int offset = getTextOffset(); 2492 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2493 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2494 2495 final int line = mTextView.getLayout().getLineForOffset(offset); 2496 mPositionY = getVerticalLocalPosition(line); 2497 mPositionY += mTextView.viewportToContentVerticalOffset(); 2498 } 2499 2500 private void updatePosition(int parentPositionX, int parentPositionY) { 2501 int positionX = parentPositionX + mPositionX; 2502 int positionY = parentPositionY + mPositionY; 2503 2504 positionY = clipVertically(positionY); 2505 2506 // Horizontal clipping 2507 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2508 final int width = mContentView.getMeasuredWidth(); 2509 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2510 positionX = Math.max(0, positionX); 2511 2512 if (isShowing()) { 2513 mPopupWindow.update(positionX, positionY, -1, -1); 2514 } else { 2515 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2516 positionX, positionY); 2517 } 2518 } 2519 2520 public void hide() { 2521 mPopupWindow.dismiss(); 2522 getPositionListener().removeSubscriber(this); 2523 } 2524 2525 @Override 2526 public void updatePosition(int parentPositionX, int parentPositionY, 2527 boolean parentPositionChanged, boolean parentScrolled) { 2528 // Either parentPositionChanged or parentScrolled is true, check if still visible 2529 if (isShowing() && isOffsetVisible(getTextOffset())) { 2530 if (parentScrolled) computeLocalPosition(); 2531 updatePosition(parentPositionX, parentPositionY); 2532 } else { 2533 hide(); 2534 } 2535 } 2536 2537 public boolean isShowing() { 2538 return mPopupWindow.isShowing(); 2539 } 2540 } 2541 2542 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2543 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2544 private static final int ADD_TO_DICTIONARY = -1; 2545 private static final int DELETE_TEXT = -2; 2546 private SuggestionInfo[] mSuggestionInfos; 2547 private int mNumberOfSuggestions; 2548 private boolean mCursorWasVisibleBeforeSuggestions; 2549 private boolean mIsShowingUp = false; 2550 private SuggestionAdapter mSuggestionsAdapter; 2551 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2552 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2553 2554 private class CustomPopupWindow extends PopupWindow { 2555 public CustomPopupWindow(Context context, int defStyleAttr) { 2556 super(context, null, defStyleAttr); 2557 } 2558 2559 @Override 2560 public void dismiss() { 2561 super.dismiss(); 2562 2563 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2564 2565 // Safe cast since show() checks that mTextView.getText() is an Editable 2566 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2567 2568 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2569 if (hasInsertionController()) { 2570 getInsertionController().show(); 2571 } 2572 } 2573 } 2574 2575 public SuggestionsPopupWindow() { 2576 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2577 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2578 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2579 } 2580 2581 @Override 2582 protected void createPopupWindow() { 2583 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2584 com.android.internal.R.attr.textSuggestionsWindowStyle); 2585 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2586 mPopupWindow.setFocusable(true); 2587 mPopupWindow.setClippingEnabled(false); 2588 } 2589 2590 @Override 2591 protected void initContentView() { 2592 ListView listView = new ListView(mTextView.getContext()); 2593 mSuggestionsAdapter = new SuggestionAdapter(); 2594 listView.setAdapter(mSuggestionsAdapter); 2595 listView.setOnItemClickListener(this); 2596 mContentView = listView; 2597 2598 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2599 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2600 for (int i = 0; i < mSuggestionInfos.length; i++) { 2601 mSuggestionInfos[i] = new SuggestionInfo(); 2602 } 2603 } 2604 2605 public boolean isShowingUp() { 2606 return mIsShowingUp; 2607 } 2608 2609 public void onParentLostFocus() { 2610 mIsShowingUp = false; 2611 } 2612 2613 private class SuggestionInfo { 2614 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2615 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2616 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2617 SpannableStringBuilder text = new SpannableStringBuilder(); 2618 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2619 android.R.style.TextAppearance_SuggestionHighlight); 2620 } 2621 2622 private class SuggestionAdapter extends BaseAdapter { 2623 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2624 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2625 2626 @Override 2627 public int getCount() { 2628 return mNumberOfSuggestions; 2629 } 2630 2631 @Override 2632 public Object getItem(int position) { 2633 return mSuggestionInfos[position]; 2634 } 2635 2636 @Override 2637 public long getItemId(int position) { 2638 return position; 2639 } 2640 2641 @Override 2642 public View getView(int position, View convertView, ViewGroup parent) { 2643 TextView textView = (TextView) convertView; 2644 2645 if (textView == null) { 2646 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2647 parent, false); 2648 } 2649 2650 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2651 textView.setText(suggestionInfo.text); 2652 2653 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2654 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2655 textView.setBackgroundColor(Color.TRANSPARENT); 2656 } else { 2657 textView.setBackgroundColor(Color.WHITE); 2658 } 2659 2660 return textView; 2661 } 2662 } 2663 2664 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2665 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2666 final int flag1 = span1.getFlags(); 2667 final int flag2 = span2.getFlags(); 2668 if (flag1 != flag2) { 2669 // The order here should match what is used in updateDrawState 2670 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2671 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2672 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2673 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2674 if (easy1 && !misspelled1) return -1; 2675 if (easy2 && !misspelled2) return 1; 2676 if (misspelled1) return -1; 2677 if (misspelled2) return 1; 2678 } 2679 2680 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2681 } 2682 } 2683 2684 /** 2685 * Returns the suggestion spans that cover the current cursor position. The suggestion 2686 * spans are sorted according to the length of text that they are attached to. 2687 */ 2688 private SuggestionSpan[] getSuggestionSpans() { 2689 int pos = mTextView.getSelectionStart(); 2690 Spannable spannable = (Spannable) mTextView.getText(); 2691 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2692 2693 mSpansLengths.clear(); 2694 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2695 int start = spannable.getSpanStart(suggestionSpan); 2696 int end = spannable.getSpanEnd(suggestionSpan); 2697 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2698 } 2699 2700 // The suggestions are sorted according to their types (easy correction first, then 2701 // misspelled) and to the length of the text that they cover (shorter first). 2702 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2703 return suggestionSpans; 2704 } 2705 2706 @Override 2707 public void show() { 2708 if (!(mTextView.getText() instanceof Editable)) return; 2709 2710 if (updateSuggestions()) { 2711 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2712 mTextView.setCursorVisible(false); 2713 mIsShowingUp = true; 2714 super.show(); 2715 } 2716 } 2717 2718 @Override 2719 protected void measureContent() { 2720 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2721 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2722 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2723 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2724 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2725 2726 int width = 0; 2727 View view = null; 2728 for (int i = 0; i < mNumberOfSuggestions; i++) { 2729 view = mSuggestionsAdapter.getView(i, view, mContentView); 2730 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2731 view.measure(horizontalMeasure, verticalMeasure); 2732 width = Math.max(width, view.getMeasuredWidth()); 2733 } 2734 2735 // Enforce the width based on actual text widths 2736 mContentView.measure( 2737 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2738 verticalMeasure); 2739 2740 Drawable popupBackground = mPopupWindow.getBackground(); 2741 if (popupBackground != null) { 2742 if (mTempRect == null) mTempRect = new Rect(); 2743 popupBackground.getPadding(mTempRect); 2744 width += mTempRect.left + mTempRect.right; 2745 } 2746 mPopupWindow.setWidth(width); 2747 } 2748 2749 @Override 2750 protected int getTextOffset() { 2751 return mTextView.getSelectionStart(); 2752 } 2753 2754 @Override 2755 protected int getVerticalLocalPosition(int line) { 2756 return mTextView.getLayout().getLineBottom(line); 2757 } 2758 2759 @Override 2760 protected int clipVertically(int positionY) { 2761 final int height = mContentView.getMeasuredHeight(); 2762 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2763 return Math.min(positionY, displayMetrics.heightPixels - height); 2764 } 2765 2766 @Override 2767 public void hide() { 2768 super.hide(); 2769 } 2770 2771 private boolean updateSuggestions() { 2772 Spannable spannable = (Spannable) mTextView.getText(); 2773 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2774 2775 final int nbSpans = suggestionSpans.length; 2776 // Suggestions are shown after a delay: the underlying spans may have been removed 2777 if (nbSpans == 0) return false; 2778 2779 mNumberOfSuggestions = 0; 2780 int spanUnionStart = mTextView.getText().length(); 2781 int spanUnionEnd = 0; 2782 2783 SuggestionSpan misspelledSpan = null; 2784 int underlineColor = 0; 2785 2786 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2787 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2788 final int spanStart = spannable.getSpanStart(suggestionSpan); 2789 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2790 spanUnionStart = Math.min(spanStart, spanUnionStart); 2791 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2792 2793 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2794 misspelledSpan = suggestionSpan; 2795 } 2796 2797 // The first span dictates the background color of the highlighted text 2798 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2799 2800 String[] suggestions = suggestionSpan.getSuggestions(); 2801 int nbSuggestions = suggestions.length; 2802 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2803 String suggestion = suggestions[suggestionIndex]; 2804 2805 boolean suggestionIsDuplicate = false; 2806 for (int i = 0; i < mNumberOfSuggestions; i++) { 2807 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2808 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2809 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2810 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2811 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2812 suggestionIsDuplicate = true; 2813 break; 2814 } 2815 } 2816 } 2817 2818 if (!suggestionIsDuplicate) { 2819 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2820 suggestionInfo.suggestionSpan = suggestionSpan; 2821 suggestionInfo.suggestionIndex = suggestionIndex; 2822 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2823 2824 mNumberOfSuggestions++; 2825 2826 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2827 // Also end outer for loop 2828 spanIndex = nbSpans; 2829 break; 2830 } 2831 } 2832 } 2833 } 2834 2835 for (int i = 0; i < mNumberOfSuggestions; i++) { 2836 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2837 } 2838 2839 // Add "Add to dictionary" item if there is a span with the misspelled flag 2840 if (misspelledSpan != null) { 2841 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2842 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2843 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2844 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2845 suggestionInfo.suggestionSpan = misspelledSpan; 2846 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2847 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2848 getContext().getString(com.android.internal.R.string.addToDictionary)); 2849 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2850 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2851 2852 mNumberOfSuggestions++; 2853 } 2854 } 2855 2856 // Delete item 2857 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2858 suggestionInfo.suggestionSpan = null; 2859 suggestionInfo.suggestionIndex = DELETE_TEXT; 2860 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2861 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2862 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2863 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2864 mNumberOfSuggestions++; 2865 2866 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2867 if (underlineColor == 0) { 2868 // Fallback on the default highlight color when the first span does not provide one 2869 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2870 } else { 2871 final float BACKGROUND_TRANSPARENCY = 0.4f; 2872 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2873 mSuggestionRangeSpan.setBackgroundColor( 2874 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2875 } 2876 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2877 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2878 2879 mSuggestionsAdapter.notifyDataSetChanged(); 2880 return true; 2881 } 2882 2883 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2884 int unionEnd) { 2885 final Spannable text = (Spannable) mTextView.getText(); 2886 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2887 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2888 2889 // Adjust the start/end of the suggestion span 2890 suggestionInfo.suggestionStart = spanStart - unionStart; 2891 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2892 + suggestionInfo.text.length(); 2893 2894 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2895 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2896 2897 // Add the text before and after the span. 2898 final String textAsString = text.toString(); 2899 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2900 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2901 } 2902 2903 @Override 2904 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2905 Editable editable = (Editable) mTextView.getText(); 2906 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2907 2908 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2909 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2910 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2911 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2912 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2913 if (spanUnionEnd < editable.length() && 2914 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2915 (spanUnionStart == 0 || 2916 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2917 spanUnionEnd = spanUnionEnd + 1; 2918 } 2919 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2920 } 2921 hide(); 2922 return; 2923 } 2924 2925 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2926 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2927 if (spanStart < 0 || spanEnd <= spanStart) { 2928 // Span has been removed 2929 hide(); 2930 return; 2931 } 2932 2933 final String originalText = editable.toString().substring(spanStart, spanEnd); 2934 2935 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2936 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2937 intent.putExtra("word", originalText); 2938 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2939 // Put a listener to replace the original text with a word which the user 2940 // modified in a user dictionary dialog. 2941 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2942 mTextView.getContext().startActivity(intent); 2943 // There is no way to know if the word was indeed added. Re-check. 2944 // TODO The ExtractEditText should remove the span in the original text instead 2945 editable.removeSpan(suggestionInfo.suggestionSpan); 2946 Selection.setSelection(editable, spanEnd); 2947 updateSpellCheckSpans(spanStart, spanEnd, false); 2948 } else { 2949 // SuggestionSpans are removed by replace: save them before 2950 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2951 SuggestionSpan.class); 2952 final int length = suggestionSpans.length; 2953 int[] suggestionSpansStarts = new int[length]; 2954 int[] suggestionSpansEnds = new int[length]; 2955 int[] suggestionSpansFlags = new int[length]; 2956 for (int i = 0; i < length; i++) { 2957 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2958 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2959 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2960 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2961 2962 // Remove potential misspelled flags 2963 int suggestionSpanFlags = suggestionSpan.getFlags(); 2964 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2965 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2966 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2967 suggestionSpan.setFlags(suggestionSpanFlags); 2968 } 2969 } 2970 2971 final int suggestionStart = suggestionInfo.suggestionStart; 2972 final int suggestionEnd = suggestionInfo.suggestionEnd; 2973 final String suggestion = suggestionInfo.text.subSequence( 2974 suggestionStart, suggestionEnd).toString(); 2975 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2976 2977 // Notify source IME of the suggestion pick. Do this before 2978 // swaping texts. 2979 suggestionInfo.suggestionSpan.notifySelection( 2980 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 2981 2982 // Swap text content between actual text and Suggestion span 2983 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 2984 suggestions[suggestionInfo.suggestionIndex] = originalText; 2985 2986 // Restore previous SuggestionSpans 2987 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 2988 for (int i = 0; i < length; i++) { 2989 // Only spans that include the modified region make sense after replacement 2990 // Spans partially included in the replaced region are removed, there is no 2991 // way to assign them a valid range after replacement 2992 if (suggestionSpansStarts[i] <= spanStart && 2993 suggestionSpansEnds[i] >= spanEnd) { 2994 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2995 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 2996 } 2997 } 2998 2999 // Move cursor at the end of the replaced word 3000 final int newCursorPosition = spanEnd + lengthDifference; 3001 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 3002 } 3003 3004 hide(); 3005 } 3006 } 3007 3008 /** 3009 * An ActionMode Callback class that is used to provide actions while in text selection mode. 3010 * 3011 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 3012 * on which of these this TextView supports. 3013 */ 3014 private class SelectionActionModeCallback extends ActionMode.Callback2 { 3015 private final Path mSelectionPath = new Path(); 3016 private final RectF mSelectionBounds = new RectF(); 3017 3018 private int mSelectionHandleHeight; 3019 private int mInsertionHandleHeight; 3020 3021 public SelectionActionModeCallback() { 3022 SelectionModifierCursorController selectionController = getSelectionController(); 3023 if (selectionController.mStartHandle == null) { 3024 // As these are for initializing selectionController, hide() must be called. 3025 selectionController.initDrawables(); 3026 selectionController.initHandles(); 3027 selectionController.hide(); 3028 } 3029 mSelectionHandleHeight = Math.max( 3030 mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight()); 3031 InsertionPointCursorController insertionController = getInsertionController(); 3032 if (insertionController != null) { 3033 insertionController.getHandle(); 3034 mInsertionHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3035 } 3036 } 3037 3038 @Override 3039 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3040 mode.setTitle(mTextView.getContext().getString( 3041 com.android.internal.R.string.textSelectionCABTitle)); 3042 mode.setSubtitle(null); 3043 mode.setTitleOptionalHint(true); 3044 populateMenuWithItems(menu); 3045 3046 if (mCustomSelectionActionModeCallback != null) { 3047 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 3048 // The custom mode can choose to cancel the action mode 3049 return false; 3050 } 3051 } 3052 3053 addIntentMenuItemsForTextProcessing(menu); 3054 3055 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3056 mTextView.setHasTransientState(true); 3057 return true; 3058 } else { 3059 return false; 3060 } 3061 } 3062 3063 private void populateMenuWithItems(Menu menu) { 3064 if (mTextView.canCut()) { 3065 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 3066 setAlphabeticShortcut('x'). 3067 setShowAsAction( 3068 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3069 } 3070 3071 if (mTextView.canCopy()) { 3072 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 3073 setAlphabeticShortcut('c'). 3074 setShowAsAction( 3075 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3076 } 3077 3078 if (mTextView.canPaste()) { 3079 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 3080 setAlphabeticShortcut('v'). 3081 setShowAsAction( 3082 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3083 } 3084 3085 if (mTextView.canShare()) { 3086 menu.add(0, TextView.ID_SHARE, 0, com.android.internal.R.string.share). 3087 setShowAsAction( 3088 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3089 } 3090 3091 if (canSelectText() && !hasPasswordTransformationMethod()) { 3092 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 3093 setAlphabeticShortcut('a'). 3094 setShowAsAction( 3095 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3096 } 3097 3098 updateReplaceItem(menu); 3099 } 3100 3101 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3102 if (mTextView.canProcessText()) { 3103 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3104 List<ResolveInfo> supportedActivities = 3105 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3106 for (ResolveInfo info : supportedActivities) { 3107 menu.add(info.loadLabel(packageManager)) 3108 .setIntent(createProcessTextIntentForResolveInfo(info)) 3109 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM 3110 | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3111 } 3112 } 3113 } 3114 3115 private Intent createProcessTextIntent() { 3116 return new Intent() 3117 .setAction(Intent.ACTION_PROCESS_TEXT) 3118 .setType("text/plain"); 3119 } 3120 3121 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3122 return createProcessTextIntent() 3123 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3124 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3125 } 3126 3127 @Override 3128 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3129 updateReplaceItem(menu); 3130 3131 if (mCustomSelectionActionModeCallback != null) { 3132 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3133 } 3134 return true; 3135 } 3136 3137 private void updateReplaceItem(Menu menu) { 3138 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3139 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3140 if (canReplace && !replaceItemExists) { 3141 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 3142 setShowAsAction( 3143 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3144 } else if (!canReplace && replaceItemExists) { 3145 menu.removeItem(TextView.ID_REPLACE); 3146 } 3147 } 3148 3149 @Override 3150 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3151 if (item.getIntent() != null 3152 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3153 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3154 mPreserveDetachedSelection = true; 3155 mTextView.startActivityForResult( 3156 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3157 return true; 3158 } 3159 if (mCustomSelectionActionModeCallback != null && 3160 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3161 return true; 3162 } 3163 if (item.getItemId() == TextView.ID_REPLACE) { 3164 onReplace(); 3165 return true; 3166 } 3167 return mTextView.onTextContextMenuItem(item.getItemId()); 3168 } 3169 3170 @Override 3171 public void onDestroyActionMode(ActionMode mode) { 3172 if (mCustomSelectionActionModeCallback != null) { 3173 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3174 } 3175 3176 /* 3177 * If we're ending this mode because we're detaching from a window, 3178 * we still have selection state to preserve. Don't clear it, we'll 3179 * bring back the selection mode when (if) we get reattached. 3180 */ 3181 if (!mPreserveDetachedSelection) { 3182 Selection.setSelection((Spannable) mTextView.getText(), 3183 mTextView.getSelectionEnd()); 3184 mTextView.setHasTransientState(false); 3185 } 3186 3187 if (mSelectionModifierCursorController != null) { 3188 mSelectionModifierCursorController.hide(); 3189 } 3190 3191 mSelectionActionMode = null; 3192 } 3193 3194 @Override 3195 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3196 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3197 super.onGetContentRect(mode, view, outRect); 3198 return; 3199 } 3200 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3201 // We have a selection. 3202 mSelectionPath.reset(); 3203 mTextView.getLayout().getSelectionPath( 3204 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3205 mSelectionPath.computeBounds(mSelectionBounds, true); 3206 mSelectionBounds.bottom += mSelectionHandleHeight; 3207 } else if (mCursorCount == 2) { 3208 // We have a split cursor. In this case, we take the rectangle that includes both 3209 // parts of the cursor to ensure we don't obscure either of them. 3210 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3211 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3212 mSelectionBounds.set( 3213 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3214 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3215 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3216 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3217 + mInsertionHandleHeight); 3218 } else { 3219 // We have a single cursor. 3220 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3221 float primaryHorizontal = 3222 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3223 mSelectionBounds.set( 3224 primaryHorizontal, 3225 mTextView.getLayout().getLineTop(line), 3226 primaryHorizontal + 1, 3227 mTextView.getLayout().getLineTop(line + 1) + mInsertionHandleHeight); 3228 } 3229 // Take TextView's padding and scroll into account. 3230 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3231 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3232 outRect.set( 3233 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3234 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3235 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3236 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3237 } 3238 } 3239 3240 private void onReplace() { 3241 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3242 stopSelectionActionMode(); 3243 Selection.setSelection((Spannable) mTextView.getText(), middle); 3244 showSuggestions(); 3245 } 3246 3247 /** 3248 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3249 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3250 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3251 */ 3252 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3253 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3254 final int[] mTmpIntOffset = new int[2]; 3255 final Matrix mViewToScreenMatrix = new Matrix(); 3256 3257 @Override 3258 public void updatePosition(int parentPositionX, int parentPositionY, 3259 boolean parentPositionChanged, boolean parentScrolled) { 3260 final InputMethodState ims = mInputMethodState; 3261 if (ims == null || ims.mBatchEditNesting > 0) { 3262 return; 3263 } 3264 final InputMethodManager imm = InputMethodManager.peekInstance(); 3265 if (null == imm) { 3266 return; 3267 } 3268 if (!imm.isActive(mTextView)) { 3269 return; 3270 } 3271 // Skip if the IME has not requested the cursor/anchor position. 3272 if (!imm.isCursorAnchorInfoEnabled()) { 3273 return; 3274 } 3275 Layout layout = mTextView.getLayout(); 3276 if (layout == null) { 3277 return; 3278 } 3279 3280 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3281 builder.reset(); 3282 3283 final int selectionStart = mTextView.getSelectionStart(); 3284 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3285 3286 // Construct transformation matrix from view local coordinates to screen coordinates. 3287 mViewToScreenMatrix.set(mTextView.getMatrix()); 3288 mTextView.getLocationOnScreen(mTmpIntOffset); 3289 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3290 builder.setMatrix(mViewToScreenMatrix); 3291 3292 final float viewportToContentHorizontalOffset = 3293 mTextView.viewportToContentHorizontalOffset(); 3294 final float viewportToContentVerticalOffset = 3295 mTextView.viewportToContentVerticalOffset(); 3296 3297 final CharSequence text = mTextView.getText(); 3298 if (text instanceof Spannable) { 3299 final Spannable sp = (Spannable) text; 3300 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3301 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3302 if (composingTextEnd < composingTextStart) { 3303 final int temp = composingTextEnd; 3304 composingTextEnd = composingTextStart; 3305 composingTextStart = temp; 3306 } 3307 final boolean hasComposingText = 3308 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3309 if (hasComposingText) { 3310 final CharSequence composingText = text.subSequence(composingTextStart, 3311 composingTextEnd); 3312 builder.setComposingText(composingTextStart, composingText); 3313 3314 final int minLine = layout.getLineForOffset(composingTextStart); 3315 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3316 for (int line = minLine; line <= maxLine; ++line) { 3317 final int lineStart = layout.getLineStart(line); 3318 final int lineEnd = layout.getLineEnd(line); 3319 final int offsetStart = Math.max(lineStart, composingTextStart); 3320 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3321 final boolean ltrLine = 3322 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3323 final float[] widths = new float[offsetEnd - offsetStart]; 3324 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3325 final float top = layout.getLineTop(line); 3326 final float bottom = layout.getLineBottom(line); 3327 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3328 final float charWidth = widths[offset - offsetStart]; 3329 final boolean isRtl = layout.isRtlCharAt(offset); 3330 final float primary = layout.getPrimaryHorizontal(offset); 3331 final float secondary = layout.getSecondaryHorizontal(offset); 3332 // TODO: This doesn't work perfectly for text with custom styles and 3333 // TAB chars. 3334 final float left; 3335 final float right; 3336 if (ltrLine) { 3337 if (isRtl) { 3338 left = secondary - charWidth; 3339 right = secondary; 3340 } else { 3341 left = primary; 3342 right = primary + charWidth; 3343 } 3344 } else { 3345 if (!isRtl) { 3346 left = secondary; 3347 right = secondary + charWidth; 3348 } else { 3349 left = primary - charWidth; 3350 right = primary; 3351 } 3352 } 3353 // TODO: Check top-right and bottom-left as well. 3354 final float localLeft = left + viewportToContentHorizontalOffset; 3355 final float localRight = right + viewportToContentHorizontalOffset; 3356 final float localTop = top + viewportToContentVerticalOffset; 3357 final float localBottom = bottom + viewportToContentVerticalOffset; 3358 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3359 final boolean isBottomRightVisible = 3360 isPositionVisible(localRight, localBottom); 3361 int characterBoundsFlags = 0; 3362 if (isTopLeftVisible || isBottomRightVisible) { 3363 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3364 } 3365 if (!isTopLeftVisible || !isBottomRightVisible) { 3366 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3367 } 3368 if (isRtl) { 3369 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3370 } 3371 // Here offset is the index in Java chars. 3372 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3373 localBottom, characterBoundsFlags); 3374 } 3375 } 3376 } 3377 } 3378 3379 // Treat selectionStart as the insertion point. 3380 if (0 <= selectionStart) { 3381 final int offset = selectionStart; 3382 final int line = layout.getLineForOffset(offset); 3383 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3384 + viewportToContentHorizontalOffset; 3385 final float insertionMarkerTop = layout.getLineTop(line) 3386 + viewportToContentVerticalOffset; 3387 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3388 + viewportToContentVerticalOffset; 3389 final float insertionMarkerBottom = layout.getLineBottom(line) 3390 + viewportToContentVerticalOffset; 3391 final boolean isTopVisible = 3392 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3393 final boolean isBottomVisible = 3394 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3395 int insertionMarkerFlags = 0; 3396 if (isTopVisible || isBottomVisible) { 3397 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3398 } 3399 if (!isTopVisible || !isBottomVisible) { 3400 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3401 } 3402 if (layout.isRtlCharAt(offset)) { 3403 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3404 } 3405 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3406 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3407 } 3408 3409 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3410 } 3411 } 3412 3413 private abstract class HandleView extends View implements TextViewPositionListener { 3414 protected Drawable mDrawable; 3415 protected Drawable mDrawableLtr; 3416 protected Drawable mDrawableRtl; 3417 private final PopupWindow mContainer; 3418 // Position with respect to the parent TextView 3419 private int mPositionX, mPositionY; 3420 private boolean mIsDragging; 3421 // Offset from touch position to mPosition 3422 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3423 protected int mHotspotX; 3424 protected int mHorizontalGravity; 3425 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3426 private float mTouchOffsetY; 3427 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3428 private float mIdealVerticalOffset; 3429 // Parent's (TextView) previous position in window 3430 private int mLastParentX, mLastParentY; 3431 // Previous text character offset 3432 protected int mPreviousOffset = -1; 3433 // Previous text character offset 3434 private boolean mPositionHasChanged = true; 3435 // Minimum touch target size for handles 3436 private int mMinSize; 3437 // Indicates the line of text that the handle is on. 3438 protected int mPrevLine = -1; 3439 3440 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3441 super(mTextView.getContext()); 3442 mContainer = new PopupWindow(mTextView.getContext(), null, 3443 com.android.internal.R.attr.textSelectHandleWindowStyle); 3444 mContainer.setSplitTouchEnabled(true); 3445 mContainer.setClippingEnabled(false); 3446 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3447 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3448 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3449 mContainer.setContentView(this); 3450 3451 mDrawableLtr = drawableLtr; 3452 mDrawableRtl = drawableRtl; 3453 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3454 com.android.internal.R.dimen.text_handle_min_size); 3455 3456 updateDrawable(); 3457 3458 final int handleHeight = getPreferredHeight(); 3459 mTouchOffsetY = -0.3f * handleHeight; 3460 mIdealVerticalOffset = 0.7f * handleHeight; 3461 } 3462 3463 protected void updateDrawable() { 3464 final int offset = getCurrentCursorOffset(); 3465 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3466 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3467 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3468 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3469 } 3470 3471 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3472 protected abstract int getHorizontalGravity(boolean isRtlRun); 3473 3474 // Touch-up filter: number of previous positions remembered 3475 private static final int HISTORY_SIZE = 5; 3476 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3477 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3478 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3479 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3480 private int mPreviousOffsetIndex = 0; 3481 private int mNumberPreviousOffsets = 0; 3482 3483 private void startTouchUpFilter(int offset) { 3484 mNumberPreviousOffsets = 0; 3485 addPositionToTouchUpFilter(offset); 3486 } 3487 3488 private void addPositionToTouchUpFilter(int offset) { 3489 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3490 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3491 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3492 mNumberPreviousOffsets++; 3493 } 3494 3495 private void filterOnTouchUp() { 3496 final long now = SystemClock.uptimeMillis(); 3497 int i = 0; 3498 int index = mPreviousOffsetIndex; 3499 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3500 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3501 i++; 3502 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3503 } 3504 3505 if (i > 0 && i < iMax && 3506 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3507 positionAtCursorOffset(mPreviousOffsets[index], false); 3508 } 3509 } 3510 3511 public boolean offsetHasBeenChanged() { 3512 return mNumberPreviousOffsets > 1; 3513 } 3514 3515 @Override 3516 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3517 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3518 } 3519 3520 private int getPreferredWidth() { 3521 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3522 } 3523 3524 private int getPreferredHeight() { 3525 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3526 } 3527 3528 public void show() { 3529 if (isShowing()) return; 3530 3531 getPositionListener().addSubscriber(this, true /* local position may change */); 3532 3533 // Make sure the offset is always considered new, even when focusing at same position 3534 mPreviousOffset = -1; 3535 positionAtCursorOffset(getCurrentCursorOffset(), false); 3536 } 3537 3538 protected void dismiss() { 3539 mIsDragging = false; 3540 mContainer.dismiss(); 3541 onDetached(); 3542 } 3543 3544 public void hide() { 3545 dismiss(); 3546 3547 getPositionListener().removeSubscriber(this); 3548 } 3549 3550 public boolean isShowing() { 3551 return mContainer.isShowing(); 3552 } 3553 3554 private boolean isVisible() { 3555 // Always show a dragging handle. 3556 if (mIsDragging) { 3557 return true; 3558 } 3559 3560 if (mTextView.isInBatchEditMode()) { 3561 return false; 3562 } 3563 3564 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3565 } 3566 3567 public abstract int getCurrentCursorOffset(); 3568 3569 protected abstract void updateSelection(int offset); 3570 3571 public abstract void updatePosition(float x, float y); 3572 3573 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3574 // A HandleView relies on the layout, which may be nulled by external methods 3575 Layout layout = mTextView.getLayout(); 3576 if (layout == null) { 3577 // Will update controllers' state, hiding them and stopping selection mode if needed 3578 prepareCursorControllers(); 3579 return; 3580 } 3581 3582 boolean offsetChanged = offset != mPreviousOffset; 3583 if (offsetChanged || parentScrolled) { 3584 if (offsetChanged) { 3585 updateSelection(offset); 3586 addPositionToTouchUpFilter(offset); 3587 } 3588 final int line = layout.getLineForOffset(offset); 3589 mPrevLine = line; 3590 3591 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3592 getHorizontalOffset() + getCursorOffset()); 3593 mPositionY = layout.getLineBottom(line); 3594 3595 // Take TextView's padding and scroll into account. 3596 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3597 mPositionY += mTextView.viewportToContentVerticalOffset(); 3598 3599 mPreviousOffset = offset; 3600 mPositionHasChanged = true; 3601 } 3602 } 3603 3604 public void updatePosition(int parentPositionX, int parentPositionY, 3605 boolean parentPositionChanged, boolean parentScrolled) { 3606 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3607 if (parentPositionChanged || mPositionHasChanged) { 3608 if (mIsDragging) { 3609 // Update touchToWindow offset in case of parent scrolling while dragging 3610 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3611 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3612 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3613 mLastParentX = parentPositionX; 3614 mLastParentY = parentPositionY; 3615 } 3616 3617 onHandleMoved(); 3618 } 3619 3620 if (isVisible()) { 3621 final int positionX = parentPositionX + mPositionX; 3622 final int positionY = parentPositionY + mPositionY; 3623 if (isShowing()) { 3624 mContainer.update(positionX, positionY, -1, -1); 3625 } else { 3626 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3627 positionX, positionY); 3628 } 3629 } else { 3630 if (isShowing()) { 3631 dismiss(); 3632 } 3633 } 3634 3635 mPositionHasChanged = false; 3636 } 3637 } 3638 3639 public void showAtLocation(int offset) { 3640 // TODO - investigate if there's a better way to show the handles 3641 // after the drag accelerator has occured. 3642 int[] tmpCords = new int[2]; 3643 mTextView.getLocationInWindow(tmpCords); 3644 3645 Layout layout = mTextView.getLayout(); 3646 int posX = tmpCords[0]; 3647 int posY = tmpCords[1]; 3648 3649 final int line = layout.getLineForOffset(offset); 3650 3651 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3652 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3653 int startY = layout.getLineBottom(line); 3654 3655 // Take TextView's padding and scroll into account. 3656 startX += mTextView.viewportToContentHorizontalOffset(); 3657 startY += mTextView.viewportToContentVerticalOffset(); 3658 3659 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3660 startX + posX, startY + posY); 3661 } 3662 3663 @Override 3664 protected void onDraw(Canvas c) { 3665 final int drawWidth = mDrawable.getIntrinsicWidth(); 3666 final int left = getHorizontalOffset(); 3667 3668 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3669 mDrawable.draw(c); 3670 } 3671 3672 private int getHorizontalOffset() { 3673 final int width = getPreferredWidth(); 3674 final int drawWidth = mDrawable.getIntrinsicWidth(); 3675 final int left; 3676 switch (mHorizontalGravity) { 3677 case Gravity.LEFT: 3678 left = 0; 3679 break; 3680 default: 3681 case Gravity.CENTER: 3682 left = (width - drawWidth) / 2; 3683 break; 3684 case Gravity.RIGHT: 3685 left = width - drawWidth; 3686 break; 3687 } 3688 return left; 3689 } 3690 3691 protected int getCursorOffset() { 3692 return 0; 3693 } 3694 3695 @Override 3696 public boolean onTouchEvent(MotionEvent ev) { 3697 switch (ev.getActionMasked()) { 3698 case MotionEvent.ACTION_DOWN: { 3699 startTouchUpFilter(getCurrentCursorOffset()); 3700 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3701 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3702 3703 final PositionListener positionListener = getPositionListener(); 3704 mLastParentX = positionListener.getPositionX(); 3705 mLastParentY = positionListener.getPositionY(); 3706 mIsDragging = true; 3707 break; 3708 } 3709 3710 case MotionEvent.ACTION_MOVE: { 3711 final float rawX = ev.getRawX(); 3712 final float rawY = ev.getRawY(); 3713 3714 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3715 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3716 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3717 float newVerticalOffset; 3718 if (previousVerticalOffset < mIdealVerticalOffset) { 3719 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3720 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3721 } else { 3722 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3723 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3724 } 3725 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3726 3727 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3728 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3729 3730 updatePosition(newPosX, newPosY); 3731 break; 3732 } 3733 3734 case MotionEvent.ACTION_UP: 3735 filterOnTouchUp(); 3736 mIsDragging = false; 3737 break; 3738 3739 case MotionEvent.ACTION_CANCEL: 3740 mIsDragging = false; 3741 break; 3742 } 3743 return true; 3744 } 3745 3746 public boolean isDragging() { 3747 return mIsDragging; 3748 } 3749 3750 void onHandleMoved() {} 3751 3752 public void onDetached() {} 3753 } 3754 3755 private class InsertionHandleView extends HandleView { 3756 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3757 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3758 3759 // Used to detect taps on the insertion handle, which will affect the selection action mode 3760 private float mDownPositionX, mDownPositionY; 3761 private Runnable mHider; 3762 3763 public InsertionHandleView(Drawable drawable) { 3764 super(drawable, drawable); 3765 } 3766 3767 @Override 3768 public void show() { 3769 super.show(); 3770 3771 final long durationSinceCutOrCopy = 3772 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3773 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3774 startSelectionActionModeWithoutSelection(); 3775 } 3776 3777 hideAfterDelay(); 3778 } 3779 3780 private void hideAfterDelay() { 3781 if (mHider == null) { 3782 mHider = new Runnable() { 3783 public void run() { 3784 hide(); 3785 } 3786 }; 3787 } else { 3788 removeHiderCallback(); 3789 } 3790 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3791 } 3792 3793 private void removeHiderCallback() { 3794 if (mHider != null) { 3795 mTextView.removeCallbacks(mHider); 3796 } 3797 } 3798 3799 @Override 3800 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3801 return drawable.getIntrinsicWidth() / 2; 3802 } 3803 3804 @Override 3805 protected int getHorizontalGravity(boolean isRtlRun) { 3806 return Gravity.CENTER_HORIZONTAL; 3807 } 3808 3809 @Override 3810 protected int getCursorOffset() { 3811 int offset = super.getCursorOffset(); 3812 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3813 if (cursor != null) { 3814 cursor.getPadding(mTempRect); 3815 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3816 } 3817 return offset; 3818 } 3819 3820 @Override 3821 public boolean onTouchEvent(MotionEvent ev) { 3822 final boolean result = super.onTouchEvent(ev); 3823 3824 switch (ev.getActionMasked()) { 3825 case MotionEvent.ACTION_DOWN: 3826 mDownPositionX = ev.getRawX(); 3827 mDownPositionY = ev.getRawY(); 3828 break; 3829 3830 case MotionEvent.ACTION_UP: 3831 if (!offsetHasBeenChanged()) { 3832 final float deltaX = mDownPositionX - ev.getRawX(); 3833 final float deltaY = mDownPositionY - ev.getRawY(); 3834 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3835 3836 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3837 mTextView.getContext()); 3838 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3839 3840 if (distanceSquared < touchSlop * touchSlop) { 3841 // Tapping on the handle toggles the selection action mode. 3842 if (mSelectionActionMode != null) { 3843 mSelectionActionMode.finish(); 3844 } else { 3845 startSelectionActionModeWithoutSelection(); 3846 } 3847 } 3848 } 3849 hideAfterDelay(); 3850 break; 3851 3852 case MotionEvent.ACTION_CANCEL: 3853 hideAfterDelay(); 3854 break; 3855 3856 default: 3857 break; 3858 } 3859 3860 return result; 3861 } 3862 3863 @Override 3864 public int getCurrentCursorOffset() { 3865 return mTextView.getSelectionStart(); 3866 } 3867 3868 @Override 3869 public void updateSelection(int offset) { 3870 Selection.setSelection((Spannable) mTextView.getText(), offset); 3871 } 3872 3873 @Override 3874 public void updatePosition(float x, float y) { 3875 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3876 } 3877 3878 @Override 3879 void onHandleMoved() { 3880 super.onHandleMoved(); 3881 removeHiderCallback(); 3882 } 3883 3884 @Override 3885 public void onDetached() { 3886 super.onDetached(); 3887 removeHiderCallback(); 3888 } 3889 } 3890 3891 private class SelectionStartHandleView extends HandleView { 3892 // Indicates whether the cursor is making adjustments within a word. 3893 private boolean mInWord = false; 3894 // Offset to track difference between touch and word boundary. 3895 protected int mTouchWordOffset; 3896 3897 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3898 super(drawableLtr, drawableRtl); 3899 } 3900 3901 @Override 3902 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3903 return isRtlRun ? 0 : drawable.getIntrinsicWidth(); 3904 } 3905 3906 @Override 3907 protected int getHorizontalGravity(boolean isRtlRun) { 3908 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 3909 } 3910 3911 @Override 3912 public int getCurrentCursorOffset() { 3913 return mTextView.getSelectionStart(); 3914 } 3915 3916 @Override 3917 public void updateSelection(int offset) { 3918 Selection.setSelection((Spannable) mTextView.getText(), offset, 3919 mTextView.getSelectionEnd()); 3920 updateDrawable(); 3921 if (mSelectionActionMode != null) { 3922 mSelectionActionMode.invalidate(); 3923 } 3924 } 3925 3926 @Override 3927 public void updatePosition(float x, float y) { 3928 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3929 final int currLine = mTextView.getLineAtCoordinate(y); 3930 3931 // Don't select white space on different lines. 3932 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 3933 3934 boolean positionCursor = false; 3935 int offset = trueOffset; 3936 int end = getWordEnd(offset, true); 3937 int start = getWordStart(offset); 3938 3939 if (offset < mPreviousOffset) { 3940 // User is increasing the selection. 3941 if (!mInWord || currLine < mPrevLine) { 3942 // We're not in a word, or we're on a different line so we'll expand by 3943 // word. First ensure the user has at least entered the next word. 3944 int offsetToWord = Math.min((end - start) / 2, 2); 3945 if (offset <= end - offsetToWord || currLine < mPrevLine) { 3946 offset = start; 3947 } else { 3948 offset = mPreviousOffset; 3949 } 3950 } 3951 mTouchWordOffset = Math.max(trueOffset - offset, 0); 3952 mInWord = !isStartBoundary(offset); 3953 positionCursor = true; 3954 } else if (offset - mTouchWordOffset > mPreviousOffset) { 3955 // User is shrinking the selection. 3956 if (currLine > mPrevLine) { 3957 // We're on a different line, so we'll snap to word boundaries. 3958 offset = end; 3959 } 3960 offset -= mTouchWordOffset; 3961 mInWord = !isEndBoundary(offset); 3962 positionCursor = true; 3963 } 3964 3965 // Handles can not cross and selection is at least one character. 3966 if (positionCursor) { 3967 final int selectionEnd = mTextView.getSelectionEnd(); 3968 if (offset >= selectionEnd) { 3969 // We can't cross the handles so let's just constrain the Y value. 3970 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 3971 if (alteredOffset >= selectionEnd) { 3972 // Can't pass the other drag handle. 3973 offset = Math.max(0, selectionEnd - 1); 3974 } else { 3975 offset = alteredOffset; 3976 } 3977 } 3978 positionAtCursorOffset(offset, false); 3979 } 3980 } 3981 3982 @Override 3983 public boolean onTouchEvent(MotionEvent event) { 3984 boolean superResult = super.onTouchEvent(event); 3985 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 3986 // Reset the touch word offset when the user has lifted their finger. 3987 mTouchWordOffset = 0; 3988 } 3989 return superResult; 3990 } 3991 } 3992 3993 private class SelectionEndHandleView extends HandleView { 3994 // Indicates whether the cursor is making adjustments within a word. 3995 private boolean mInWord = false; 3996 // Offset to track difference between touch and word boundary. 3997 protected int mTouchWordOffset; 3998 3999 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 4000 super(drawableLtr, drawableRtl); 4001 } 4002 4003 @Override 4004 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4005 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 4006 } 4007 4008 @Override 4009 protected int getHorizontalGravity(boolean isRtlRun) { 4010 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 4011 } 4012 4013 @Override 4014 public int getCurrentCursorOffset() { 4015 return mTextView.getSelectionEnd(); 4016 } 4017 4018 @Override 4019 public void updateSelection(int offset) { 4020 Selection.setSelection((Spannable) mTextView.getText(), 4021 mTextView.getSelectionStart(), offset); 4022 if (mSelectionActionMode != null) { 4023 mSelectionActionMode.invalidate(); 4024 } 4025 updateDrawable(); 4026 } 4027 4028 @Override 4029 public void updatePosition(float x, float y) { 4030 final int trueOffset = mTextView.getOffsetForPosition(x, y); 4031 final int currLine = mTextView.getLineAtCoordinate(y); 4032 4033 // Don't select white space on different lines. 4034 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 4035 4036 int offset = trueOffset; 4037 boolean positionCursor = false; 4038 4039 int end = getWordEnd(offset, true); 4040 int start = getWordStart(offset); 4041 4042 if (offset > mPreviousOffset) { 4043 // User is increasing the selection. 4044 if (!mInWord || currLine > mPrevLine) { 4045 // We're not in a word, or we're on a different line so we'll expand by 4046 // word. First ensure the user has at least entered the next word. 4047 int midPoint = Math.min((end - start) / 2, 2); 4048 if (offset >= start + midPoint || currLine > mPrevLine) { 4049 offset = end; 4050 } else { 4051 offset = mPreviousOffset; 4052 } 4053 } 4054 mTouchWordOffset = Math.max(offset - trueOffset, 0); 4055 mInWord = !isEndBoundary(offset); 4056 positionCursor = true; 4057 } else if (offset + mTouchWordOffset < mPreviousOffset) { 4058 // User is shrinking the selection. 4059 if (currLine < mPrevLine) { 4060 // We're on a different line, so we'll snap to word boundaries. 4061 offset = start; 4062 } 4063 offset += mTouchWordOffset; 4064 positionCursor = true; 4065 mInWord = !isStartBoundary(offset); 4066 } 4067 4068 if (positionCursor) { 4069 final int selectionStart = mTextView.getSelectionStart(); 4070 if (offset <= selectionStart) { 4071 // We can't cross the handles so let's just constrain the Y value. 4072 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 4073 int length = mTextView.getText().length(); 4074 if (alteredOffset <= selectionStart) { 4075 // Can't pass the other drag handle. 4076 offset = Math.min(selectionStart + 1, length); 4077 } else { 4078 offset = Math.min(alteredOffset, length); 4079 } 4080 } 4081 positionAtCursorOffset(offset, false); 4082 } 4083 } 4084 4085 @Override 4086 public boolean onTouchEvent(MotionEvent event) { 4087 boolean superResult = super.onTouchEvent(event); 4088 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4089 // Reset the touch word offset when the user has lifted their finger. 4090 mTouchWordOffset = 0; 4091 } 4092 return superResult; 4093 } 4094 } 4095 4096 /** 4097 * Checks whether selection is happening on a different line than previous and 4098 * if that line only contains whitespace up to the touch location. 4099 * 4100 * @param prevLine The previous line the selection was on. 4101 * @param currLine The current line being selected. 4102 * @param offset The offset in the text where the touch occurred. 4103 * @return Whether or not it was just a white space line being selected. 4104 */ 4105 private boolean isWhitespaceLine(int prevLine, int currLine, int offset) { 4106 if (prevLine == currLine) { 4107 // Same line; don't care. 4108 return false; 4109 } 4110 CharSequence text = mTextView.getText(); 4111 if (offset == text.length()) { 4112 // No character at the last position. 4113 return false; 4114 } 4115 int lineEndOffset = mTextView.getLayout().getLineEnd(currLine); 4116 for (int cp, i = offset; i < lineEndOffset; i += Character.charCount(cp)) { 4117 cp = Character.codePointAt(text, i); 4118 if (!Character.isSpaceChar(cp) && !Character.isWhitespace(cp)) { 4119 // There are non white space chars on the line. 4120 return false; 4121 } 4122 } 4123 return true; 4124 } 4125 4126 /** 4127 * A CursorController instance can be used to control a cursor in the text. 4128 */ 4129 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4130 /** 4131 * Makes the cursor controller visible on screen. 4132 * See also {@link #hide()}. 4133 */ 4134 public void show(); 4135 4136 /** 4137 * Hide the cursor controller from screen. 4138 * See also {@link #show()}. 4139 */ 4140 public void hide(); 4141 4142 /** 4143 * Called when the view is detached from window. Perform house keeping task, such as 4144 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4145 * preventing the activity from being recycled. 4146 */ 4147 public void onDetached(); 4148 } 4149 4150 private class InsertionPointCursorController implements CursorController { 4151 private InsertionHandleView mHandle; 4152 4153 public void show() { 4154 getHandle().show(); 4155 } 4156 4157 public void hide() { 4158 if (mHandle != null) { 4159 mHandle.hide(); 4160 } 4161 } 4162 4163 public void onTouchModeChanged(boolean isInTouchMode) { 4164 if (!isInTouchMode) { 4165 hide(); 4166 } 4167 } 4168 4169 private InsertionHandleView getHandle() { 4170 if (mSelectHandleCenter == null) { 4171 mSelectHandleCenter = mTextView.getContext().getDrawable( 4172 mTextView.mTextSelectHandleRes); 4173 } 4174 if (mHandle == null) { 4175 mHandle = new InsertionHandleView(mSelectHandleCenter); 4176 } 4177 return mHandle; 4178 } 4179 4180 @Override 4181 public void onDetached() { 4182 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4183 observer.removeOnTouchModeChangeListener(this); 4184 4185 if (mHandle != null) mHandle.onDetached(); 4186 } 4187 } 4188 4189 class SelectionModifierCursorController implements CursorController { 4190 // The cursor controller handles, lazily created when shown. 4191 private SelectionStartHandleView mStartHandle; 4192 private SelectionEndHandleView mEndHandle; 4193 // The offsets of that last touch down event. Remembered to start selection there. 4194 private int mMinTouchOffset, mMaxTouchOffset; 4195 4196 // Double tap detection 4197 private long mPreviousTapUpTime = 0; 4198 private float mDownPositionX, mDownPositionY; 4199 private boolean mGestureStayedInTapRegion; 4200 4201 // Where the user first starts the drag motion. 4202 private int mStartOffset = -1; 4203 // Indicates whether the user is selecting text and using the drag accelerator. 4204 private boolean mDragAcceleratorActive; 4205 // Indicates the line of text the drag accelerator is on. 4206 private int mPrevLine = -1; 4207 4208 SelectionModifierCursorController() { 4209 resetTouchOffsets(); 4210 } 4211 4212 public void show() { 4213 if (mTextView.isInBatchEditMode()) { 4214 return; 4215 } 4216 initDrawables(); 4217 initHandles(); 4218 hideInsertionPointCursorController(); 4219 } 4220 4221 private void initDrawables() { 4222 if (mSelectHandleLeft == null) { 4223 mSelectHandleLeft = mTextView.getContext().getDrawable( 4224 mTextView.mTextSelectHandleLeftRes); 4225 } 4226 if (mSelectHandleRight == null) { 4227 mSelectHandleRight = mTextView.getContext().getDrawable( 4228 mTextView.mTextSelectHandleRightRes); 4229 } 4230 } 4231 4232 private void initHandles() { 4233 // Lazy object creation has to be done before updatePosition() is called. 4234 if (mStartHandle == null) { 4235 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4236 } 4237 if (mEndHandle == null) { 4238 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4239 } 4240 4241 mStartHandle.show(); 4242 mEndHandle.show(); 4243 4244 hideInsertionPointCursorController(); 4245 } 4246 4247 public void hide() { 4248 if (mStartHandle != null) mStartHandle.hide(); 4249 if (mEndHandle != null) mEndHandle.hide(); 4250 } 4251 4252 public void enterDrag() { 4253 // Just need to init the handles / hide insertion cursor. 4254 show(); 4255 mDragAcceleratorActive = true; 4256 // Start location of selection. 4257 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4258 mLastDownPositionY); 4259 // Don't show the handles until user has lifted finger. 4260 hide(); 4261 4262 // This stops scrolling parents from intercepting the touch event, allowing 4263 // the user to continue dragging across the screen to select text; TextView will 4264 // scroll as necessary. 4265 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4266 } 4267 4268 public void onTouchEvent(MotionEvent event) { 4269 // This is done even when the View does not have focus, so that long presses can start 4270 // selection and tap can move cursor from this tap position. 4271 switch (event.getActionMasked()) { 4272 case MotionEvent.ACTION_DOWN: 4273 final float x = event.getX(); 4274 final float y = event.getY(); 4275 4276 // Remember finger down position, to be able to start selection from there. 4277 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4278 4279 // Double tap detection 4280 if (mGestureStayedInTapRegion) { 4281 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 4282 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 4283 final float deltaX = x - mDownPositionX; 4284 final float deltaY = y - mDownPositionY; 4285 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4286 4287 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4288 mTextView.getContext()); 4289 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4290 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4291 4292 if (stayedInArea && isPositionOnText(x, y)) { 4293 startSelectionActionModeWithSelectionAndStartDrag(); 4294 mDiscardNextActionUp = true; 4295 } 4296 } 4297 } 4298 4299 // New selection, reset line. 4300 mPrevLine = mTextView.getLineAtCoordinate(y); 4301 mDownPositionX = x; 4302 mDownPositionY = y; 4303 mGestureStayedInTapRegion = true; 4304 break; 4305 4306 case MotionEvent.ACTION_POINTER_DOWN: 4307 case MotionEvent.ACTION_POINTER_UP: 4308 // Handle multi-point gestures. Keep min and max offset positions. 4309 // Only activated for devices that correctly handle multi-touch. 4310 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4311 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4312 updateMinAndMaxOffsets(event); 4313 } 4314 break; 4315 4316 case MotionEvent.ACTION_MOVE: 4317 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4318 mTextView.getContext()); 4319 4320 if (mGestureStayedInTapRegion) { 4321 final float deltaX = event.getX() - mDownPositionX; 4322 final float deltaY = event.getY() - mDownPositionY; 4323 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4324 4325 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4326 4327 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4328 mGestureStayedInTapRegion = false; 4329 } 4330 } 4331 4332 if (mStartHandle != null && mStartHandle.isShowing()) { 4333 // Don't do the drag if the handles are showing already. 4334 break; 4335 } 4336 4337 if (mStartOffset != -1) { 4338 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4339 event.getY()); 4340 int offset = rawOffset; 4341 4342 // We don't start "dragging" until the user is past the initial word that 4343 // gets selected on long press. 4344 int firstWordStart = getWordStart(mStartOffset); 4345 int firstWordEnd = getWordEnd(mStartOffset, false); 4346 if (offset > firstWordEnd || offset < firstWordStart) { 4347 4348 // Basically the goal in the below code is to have the highlight be 4349 // offset so that your finger isn't covering the end point. 4350 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4351 float mx = event.getX(); 4352 float my = event.getY(); 4353 if (mx > fingerOffset) mx -= fingerOffset; 4354 if (my > fingerOffset) my -= fingerOffset; 4355 offset = mTextView.getOffsetForPosition(mx, my); 4356 4357 int currLine = mTextView.getLineAtCoordinate(my); 4358 4359 // Don't select white space on different lines. 4360 if (isWhitespaceLine(mPrevLine, currLine, offset)) return; 4361 4362 mPrevLine = currLine; 4363 4364 // Perform the check for closeness at edge of view, if we're very close 4365 // don't adjust the offset to be in front of the finger - otherwise the 4366 // user can't select words at the edge. 4367 if (mTextView.getWidth() - fingerOffset > mx) { 4368 // We're going by word, so we need to make sure that the offset 4369 // that we get is within this, so we'll get the previous boundary. 4370 final WordIterator wordIterator = getWordIteratorWithText(); 4371 4372 final int precedingOffset = wordIterator.preceding(offset); 4373 if (mStartOffset < offset) { 4374 // Expanding with bottom handle, in this case the selection end 4375 // is before the finger. 4376 offset = Math.max(precedingOffset - 1, 0); 4377 } else { 4378 // Expand with the start handle, in this case the selection 4379 // start is before the finger. 4380 if (precedingOffset == WordIterator.DONE) { 4381 offset = 0; 4382 } else { 4383 offset = wordIterator.preceding(precedingOffset); 4384 } 4385 } 4386 } 4387 if (offset == WordIterator.DONE) 4388 offset = rawOffset; 4389 4390 // Need to adjust start offset based on direction of movement. 4391 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4392 : getWordEnd(mStartOffset, true); 4393 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4394 offset); 4395 } 4396 } 4397 break; 4398 4399 case MotionEvent.ACTION_UP: 4400 mPreviousTapUpTime = SystemClock.uptimeMillis(); 4401 if (mDragAcceleratorActive) { 4402 // No longer dragging to select text, let the parent intercept events. 4403 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4404 4405 show(); 4406 int startOffset = mTextView.getSelectionStart(); 4407 int endOffset = mTextView.getSelectionEnd(); 4408 4409 // Since we don't let drag handles pass once they're visible, we need to 4410 // make sure the start / end locations are correct because the user *can* 4411 // switch directions during the initial drag. 4412 if (endOffset < startOffset) { 4413 int tmp = endOffset; 4414 endOffset = startOffset; 4415 startOffset = tmp; 4416 4417 // Also update the selection with the right offsets in this case. 4418 Selection.setSelection((Spannable) mTextView.getText(), 4419 startOffset, endOffset); 4420 } 4421 4422 // Need to do this to display the handles. 4423 mStartHandle.showAtLocation(startOffset); 4424 mEndHandle.showAtLocation(endOffset); 4425 4426 // No longer the first dragging motion, reset. 4427 mDragAcceleratorActive = false; 4428 mStartOffset = -1; 4429 } 4430 break; 4431 } 4432 } 4433 4434 /** 4435 * @param event 4436 */ 4437 private void updateMinAndMaxOffsets(MotionEvent event) { 4438 int pointerCount = event.getPointerCount(); 4439 for (int index = 0; index < pointerCount; index++) { 4440 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4441 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4442 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4443 } 4444 } 4445 4446 public int getMinTouchOffset() { 4447 return mMinTouchOffset; 4448 } 4449 4450 public int getMaxTouchOffset() { 4451 return mMaxTouchOffset; 4452 } 4453 4454 public void resetTouchOffsets() { 4455 mMinTouchOffset = mMaxTouchOffset = -1; 4456 mStartOffset = -1; 4457 mDragAcceleratorActive = false; 4458 } 4459 4460 /** 4461 * @return true iff this controller is currently used to move the selection start. 4462 */ 4463 public boolean isSelectionStartDragged() { 4464 return mStartHandle != null && mStartHandle.isDragging(); 4465 } 4466 4467 /** 4468 * @return true if the user is selecting text using the drag accelerator. 4469 */ 4470 public boolean isDragAcceleratorActive() { 4471 return mDragAcceleratorActive; 4472 } 4473 4474 public void onTouchModeChanged(boolean isInTouchMode) { 4475 if (!isInTouchMode) { 4476 hide(); 4477 } 4478 } 4479 4480 @Override 4481 public void onDetached() { 4482 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4483 observer.removeOnTouchModeChangeListener(this); 4484 4485 if (mStartHandle != null) mStartHandle.onDetached(); 4486 if (mEndHandle != null) mEndHandle.onDetached(); 4487 } 4488 } 4489 4490 private class CorrectionHighlighter { 4491 private final Path mPath = new Path(); 4492 private final Paint mPaint = new Paint(); 4493 private int mStart, mEnd; 4494 private long mFadingStartTime; 4495 private RectF mTempRectF; 4496 private final static int FADE_OUT_DURATION = 400; 4497 4498 public CorrectionHighlighter() { 4499 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4500 applicationScale); 4501 mPaint.setStyle(Paint.Style.FILL); 4502 } 4503 4504 public void highlight(CorrectionInfo info) { 4505 mStart = info.getOffset(); 4506 mEnd = mStart + info.getNewText().length(); 4507 mFadingStartTime = SystemClock.uptimeMillis(); 4508 4509 if (mStart < 0 || mEnd < 0) { 4510 stopAnimation(); 4511 } 4512 } 4513 4514 public void draw(Canvas canvas, int cursorOffsetVertical) { 4515 if (updatePath() && updatePaint()) { 4516 if (cursorOffsetVertical != 0) { 4517 canvas.translate(0, cursorOffsetVertical); 4518 } 4519 4520 canvas.drawPath(mPath, mPaint); 4521 4522 if (cursorOffsetVertical != 0) { 4523 canvas.translate(0, -cursorOffsetVertical); 4524 } 4525 invalidate(true); // TODO invalidate cursor region only 4526 } else { 4527 stopAnimation(); 4528 invalidate(false); // TODO invalidate cursor region only 4529 } 4530 } 4531 4532 private boolean updatePaint() { 4533 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4534 if (duration > FADE_OUT_DURATION) return false; 4535 4536 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4537 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4538 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4539 ((int) (highlightColorAlpha * coef) << 24); 4540 mPaint.setColor(color); 4541 return true; 4542 } 4543 4544 private boolean updatePath() { 4545 final Layout layout = mTextView.getLayout(); 4546 if (layout == null) return false; 4547 4548 // Update in case text is edited while the animation is run 4549 final int length = mTextView.getText().length(); 4550 int start = Math.min(length, mStart); 4551 int end = Math.min(length, mEnd); 4552 4553 mPath.reset(); 4554 layout.getSelectionPath(start, end, mPath); 4555 return true; 4556 } 4557 4558 private void invalidate(boolean delayed) { 4559 if (mTextView.getLayout() == null) return; 4560 4561 if (mTempRectF == null) mTempRectF = new RectF(); 4562 mPath.computeBounds(mTempRectF, false); 4563 4564 int left = mTextView.getCompoundPaddingLeft(); 4565 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4566 4567 if (delayed) { 4568 mTextView.postInvalidateOnAnimation( 4569 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4570 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4571 } else { 4572 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4573 (int) mTempRectF.right, (int) mTempRectF.bottom); 4574 } 4575 } 4576 4577 private void stopAnimation() { 4578 Editor.this.mCorrectionHighlighter = null; 4579 } 4580 } 4581 4582 private static class ErrorPopup extends PopupWindow { 4583 private boolean mAbove = false; 4584 private final TextView mView; 4585 private int mPopupInlineErrorBackgroundId = 0; 4586 private int mPopupInlineErrorAboveBackgroundId = 0; 4587 4588 ErrorPopup(TextView v, int width, int height) { 4589 super(v, width, height); 4590 mView = v; 4591 // Make sure the TextView has a background set as it will be used the first time it is 4592 // shown and positioned. Initialized with below background, which should have 4593 // dimensions identical to the above version for this to work (and is more likely). 4594 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4595 com.android.internal.R.styleable.Theme_errorMessageBackground); 4596 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4597 } 4598 4599 void fixDirection(boolean above) { 4600 mAbove = above; 4601 4602 if (above) { 4603 mPopupInlineErrorAboveBackgroundId = 4604 getResourceId(mPopupInlineErrorAboveBackgroundId, 4605 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4606 } else { 4607 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4608 com.android.internal.R.styleable.Theme_errorMessageBackground); 4609 } 4610 4611 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4612 mPopupInlineErrorBackgroundId); 4613 } 4614 4615 private int getResourceId(int currentId, int index) { 4616 if (currentId == 0) { 4617 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4618 R.styleable.Theme); 4619 currentId = styledAttributes.getResourceId(index, 0); 4620 styledAttributes.recycle(); 4621 } 4622 return currentId; 4623 } 4624 4625 @Override 4626 public void update(int x, int y, int w, int h, boolean force) { 4627 super.update(x, y, w, h, force); 4628 4629 boolean above = isAboveAnchor(); 4630 if (above != mAbove) { 4631 fixDirection(above); 4632 } 4633 } 4634 } 4635 4636 static class InputContentType { 4637 int imeOptions = EditorInfo.IME_NULL; 4638 String privateImeOptions; 4639 CharSequence imeActionLabel; 4640 int imeActionId; 4641 Bundle extras; 4642 OnEditorActionListener onEditorActionListener; 4643 boolean enterDown; 4644 } 4645 4646 static class InputMethodState { 4647 Rect mCursorRectInWindow = new Rect(); 4648 float[] mTmpOffset = new float[2]; 4649 ExtractedTextRequest mExtractedTextRequest; 4650 final ExtractedText mExtractedText = new ExtractedText(); 4651 int mBatchEditNesting; 4652 boolean mCursorChanged; 4653 boolean mSelectionModeChanged; 4654 boolean mContentChanged; 4655 int mChangedStart, mChangedEnd, mChangedDelta; 4656 } 4657 4658 /** 4659 * @return True iff (start, end) is a valid range within the text. 4660 */ 4661 private static boolean isValidRange(CharSequence text, int start, int end) { 4662 return 0 <= start && start <= end && end <= text.length(); 4663 } 4664 4665 /** 4666 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4667 * text being typed (and hence always returns null from the filter() method). 4668 */ 4669 public static class UndoInputFilter implements InputFilter { 4670 private final Editor mEditor; 4671 4672 // Whether the current filter pass is directly caused by an end-user text edit. 4673 private boolean mIsUserEdit; 4674 4675 // Whether the text field is handling an IME composition. Must be parceled in case the user 4676 // rotates the screen during composition. 4677 private boolean mHasComposition; 4678 4679 public UndoInputFilter(Editor editor) { 4680 mEditor = editor; 4681 } 4682 4683 public void saveInstanceState(Parcel parcel) { 4684 parcel.writeInt(mIsUserEdit ? 1 : 0); 4685 parcel.writeInt(mHasComposition ? 1 : 0); 4686 } 4687 4688 public void restoreInstanceState(Parcel parcel) { 4689 mIsUserEdit = parcel.readInt() != 0; 4690 mHasComposition = parcel.readInt() != 0; 4691 } 4692 4693 /** 4694 * Signals that a user-triggered edit is starting. 4695 */ 4696 public void beginBatchEdit() { 4697 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4698 mIsUserEdit = true; 4699 } 4700 4701 public void endBatchEdit() { 4702 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4703 mIsUserEdit = false; 4704 } 4705 4706 @Override 4707 public CharSequence filter(CharSequence source, int start, int end, 4708 Spanned dest, int dstart, int dend) { 4709 if (DEBUG_UNDO) { 4710 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4711 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4712 } 4713 4714 // Check to see if this edit should be tracked for undo. 4715 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4716 return null; 4717 } 4718 4719 // Check for and handle IME composition edits. 4720 if (handleCompositionEdit(source, start, end, dstart)) { 4721 return null; 4722 } 4723 4724 // Handle keyboard edits. 4725 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4726 return null; 4727 } 4728 4729 /** 4730 * Returns true iff the edit was handled, either because it should be ignored or because 4731 * this function created an undo operation for it. 4732 */ 4733 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4734 // Ignore edits while the user is composing. 4735 if (isComposition(source)) { 4736 mHasComposition = true; 4737 return true; 4738 } 4739 final boolean hadComposition = mHasComposition; 4740 mHasComposition = false; 4741 4742 // Check for the transition out of the composing state. 4743 if (hadComposition) { 4744 // If there was no text the user canceled composition. Ignore the edit. 4745 if (start == end) { 4746 return true; 4747 } 4748 4749 // Otherwise the user inserted the composition. 4750 String newText = TextUtils.substring(source, start, end); 4751 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4752 recordEdit(edit, false /* forceMerge */); 4753 return true; 4754 } 4755 4756 // This was neither a composition event nor a transition out of composing. 4757 return false; 4758 } 4759 4760 private void handleKeyboardEdit(CharSequence source, int start, int end, 4761 Spanned dest, int dstart, int dend) { 4762 // An application may install a TextWatcher to provide additional modifications after 4763 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4764 // string). This results in multiple filter() calls for what the user considers to be 4765 // a single operation. Always undo the whole set of changes in one step. 4766 final boolean forceMerge = isInTextWatcher(); 4767 4768 // Build a new operation with all the information from this edit. 4769 String newText = TextUtils.substring(source, start, end); 4770 String oldText = TextUtils.substring(dest, dstart, dend); 4771 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4772 recordEdit(edit, forceMerge); 4773 } 4774 4775 /** 4776 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4777 * If forceMerge is true then the new edit is always merged. 4778 */ 4779 private void recordEdit(EditOperation edit, boolean forceMerge) { 4780 // Fetch the last edit operation and attempt to merge in the new edit. 4781 final UndoManager um = mEditor.mUndoManager; 4782 um.beginUpdate("Edit text"); 4783 EditOperation lastEdit = um.getLastOperation( 4784 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4785 if (lastEdit == null) { 4786 // Add this as the first edit. 4787 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4788 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4789 } else if (forceMerge) { 4790 // Forced merges take priority because they could be the result of a non-user-edit 4791 // change and this case should not create a new undo operation. 4792 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4793 lastEdit.forceMergeWith(edit); 4794 } else if (!mIsUserEdit) { 4795 // An application directly modified the Editable outside of a text edit. Treat this 4796 // as a new change and don't attempt to merge. 4797 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4798 um.commitState(mEditor.mUndoOwner); 4799 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4800 } else if (lastEdit.mergeWith(edit)) { 4801 // Merge succeeded, nothing else to do. 4802 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4803 } else { 4804 // Could not merge with the last edit, so commit the last edit and add this edit. 4805 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4806 um.commitState(mEditor.mUndoOwner); 4807 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4808 } 4809 um.endUpdate(); 4810 } 4811 4812 private boolean canUndoEdit(CharSequence source, int start, int end, 4813 Spanned dest, int dstart, int dend) { 4814 if (!mEditor.mAllowUndo) { 4815 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4816 return false; 4817 } 4818 4819 if (mEditor.mUndoManager.isInUndo()) { 4820 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4821 return false; 4822 } 4823 4824 // Text filters run before input operations are applied. However, some input operations 4825 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4826 // attempt to undo invalid operations. 4827 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4828 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4829 return false; 4830 } 4831 4832 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4833 // on an input field. Skip no-op changes. 4834 if (start == end && dstart == dend) { 4835 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4836 return false; 4837 } 4838 4839 return true; 4840 } 4841 4842 private boolean isComposition(CharSequence source) { 4843 if (!(source instanceof Spannable)) { 4844 return false; 4845 } 4846 // This is a composition edit if the source has a non-zero-length composing span. 4847 Spannable text = (Spannable) source; 4848 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4849 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4850 return composeBegin < composeEnd; 4851 } 4852 4853 private boolean isInTextWatcher() { 4854 CharSequence text = mEditor.mTextView.getText(); 4855 return (text instanceof SpannableStringBuilder) 4856 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4857 } 4858 } 4859 4860 /** 4861 * An operation to undo a single "edit" to a text view. 4862 */ 4863 public static class EditOperation extends UndoOperation<Editor> { 4864 private static final int TYPE_INSERT = 0; 4865 private static final int TYPE_DELETE = 1; 4866 private static final int TYPE_REPLACE = 2; 4867 4868 private int mType; 4869 private String mOldText; 4870 private int mOldTextStart; 4871 private String mNewText; 4872 private int mNewTextStart; 4873 4874 private int mOldCursorPos; 4875 private int mNewCursorPos; 4876 4877 /** 4878 * Constructs an edit operation from a text input operation on editor that replaces the 4879 * oldText starting at dstart with newText. 4880 */ 4881 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 4882 super(editor.mUndoOwner); 4883 mOldText = oldText; 4884 mNewText = newText; 4885 4886 // Determine the type of the edit and store where it occurred. Avoid storing 4887 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4888 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4889 // outside the bounds of the final text). 4890 if (mNewText.length() > 0 && mOldText.length() == 0) { 4891 mType = TYPE_INSERT; 4892 mNewTextStart = dstart; 4893 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4894 mType = TYPE_DELETE; 4895 mOldTextStart = dstart; 4896 } else { 4897 mType = TYPE_REPLACE; 4898 mOldTextStart = mNewTextStart = dstart; 4899 } 4900 4901 // Store cursor data. 4902 mOldCursorPos = editor.mTextView.getSelectionStart(); 4903 mNewCursorPos = dstart + mNewText.length(); 4904 } 4905 4906 public EditOperation(Parcel src, ClassLoader loader) { 4907 super(src, loader); 4908 mType = src.readInt(); 4909 mOldText = src.readString(); 4910 mOldTextStart = src.readInt(); 4911 mNewText = src.readString(); 4912 mNewTextStart = src.readInt(); 4913 mOldCursorPos = src.readInt(); 4914 mNewCursorPos = src.readInt(); 4915 } 4916 4917 @Override 4918 public void writeToParcel(Parcel dest, int flags) { 4919 dest.writeInt(mType); 4920 dest.writeString(mOldText); 4921 dest.writeInt(mOldTextStart); 4922 dest.writeString(mNewText); 4923 dest.writeInt(mNewTextStart); 4924 dest.writeInt(mOldCursorPos); 4925 dest.writeInt(mNewCursorPos); 4926 } 4927 4928 private int getNewTextEnd() { 4929 return mNewTextStart + mNewText.length(); 4930 } 4931 4932 private int getOldTextEnd() { 4933 return mOldTextStart + mOldText.length(); 4934 } 4935 4936 @Override 4937 public void commit() { 4938 } 4939 4940 @Override 4941 public void undo() { 4942 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4943 // Remove the new text and insert the old. 4944 Editor editor = getOwnerData(); 4945 Editable text = (Editable) editor.mTextView.getText(); 4946 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4947 mOldCursorPos); 4948 } 4949 4950 @Override 4951 public void redo() { 4952 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4953 // Remove the old text and insert the new. 4954 Editor editor = getOwnerData(); 4955 Editable text = (Editable) editor.mTextView.getText(); 4956 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4957 mNewCursorPos); 4958 } 4959 4960 /** 4961 * Attempts to merge this existing operation with a new edit. 4962 * @param edit The new edit operation. 4963 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4964 * object unchanged. 4965 */ 4966 private boolean mergeWith(EditOperation edit) { 4967 if (DEBUG_UNDO) { 4968 Log.d(TAG, "mergeWith old " + this); 4969 Log.d(TAG, "mergeWith new " + edit); 4970 } 4971 switch (mType) { 4972 case TYPE_INSERT: 4973 return mergeInsertWith(edit); 4974 case TYPE_DELETE: 4975 return mergeDeleteWith(edit); 4976 case TYPE_REPLACE: 4977 return mergeReplaceWith(edit); 4978 default: 4979 return false; 4980 } 4981 } 4982 4983 private boolean mergeInsertWith(EditOperation edit) { 4984 // Only merge continuous insertions. 4985 if (edit.mType != TYPE_INSERT) { 4986 return false; 4987 } 4988 // Only merge insertions that are contiguous. 4989 if (getNewTextEnd() != edit.mNewTextStart) { 4990 return false; 4991 } 4992 mNewText += edit.mNewText; 4993 mNewCursorPos = edit.mNewCursorPos; 4994 return true; 4995 } 4996 4997 // TODO: Support forward delete. 4998 private boolean mergeDeleteWith(EditOperation edit) { 4999 // Only merge continuous deletes. 5000 if (edit.mType != TYPE_DELETE) { 5001 return false; 5002 } 5003 // Only merge deletions that are contiguous. 5004 if (mOldTextStart != edit.getOldTextEnd()) { 5005 return false; 5006 } 5007 mOldTextStart = edit.mOldTextStart; 5008 mOldText = edit.mOldText + mOldText; 5009 mNewCursorPos = edit.mNewCursorPos; 5010 return true; 5011 } 5012 5013 private boolean mergeReplaceWith(EditOperation edit) { 5014 // Replacements can merge only with adjacent inserts. 5015 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 5016 return false; 5017 } 5018 mOldText += edit.mOldText; 5019 mNewText += edit.mNewText; 5020 mNewCursorPos = edit.mNewCursorPos; 5021 return true; 5022 } 5023 5024 /** 5025 * Forcibly creates a single merged edit operation by simulating the entire text 5026 * contents being replaced. 5027 */ 5028 public void forceMergeWith(EditOperation edit) { 5029 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5030 Editor editor = getOwnerData(); 5031 5032 // Copy the text of the current field. 5033 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5034 // but would require two parallel implementations of modifyText() because Editable and 5035 // StringBuilder do not share an interface for replace/delete/insert. 5036 Editable editable = (Editable) editor.mTextView.getText(); 5037 Editable originalText = new SpannableStringBuilder(editable.toString()); 5038 5039 // Roll back the last operation. 5040 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5041 mOldCursorPos); 5042 5043 // Clone the text again and apply the new operation. 5044 Editable finalText = new SpannableStringBuilder(editable.toString()); 5045 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5046 edit.mNewTextStart, edit.mNewCursorPos); 5047 5048 // Convert this operation into a non-mergeable replacement of the entire string. 5049 mType = TYPE_REPLACE; 5050 mNewText = finalText.toString(); 5051 mNewTextStart = 0; 5052 mOldText = originalText.toString(); 5053 mOldTextStart = 0; 5054 mNewCursorPos = edit.mNewCursorPos; 5055 // mOldCursorPos is unchanged. 5056 } 5057 5058 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5059 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5060 // Apply the edit if it is still valid. 5061 if (isValidRange(text, deleteFrom, deleteTo) && 5062 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5063 if (deleteFrom != deleteTo) { 5064 text.delete(deleteFrom, deleteTo); 5065 } 5066 if (newText.length() != 0) { 5067 text.insert(newTextInsertAt, newText); 5068 } 5069 } 5070 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5071 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5072 // TODO: Select all the text that was undone. 5073 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5074 Selection.setSelection(text, newCursorPos); 5075 } 5076 } 5077 5078 private String getTypeString() { 5079 switch (mType) { 5080 case TYPE_INSERT: 5081 return "insert"; 5082 case TYPE_DELETE: 5083 return "delete"; 5084 case TYPE_REPLACE: 5085 return "replace"; 5086 default: 5087 return ""; 5088 } 5089 } 5090 5091 @Override 5092 public String toString() { 5093 return "[mType=" + getTypeString() + ", " + 5094 "mOldText=" + mOldText + ", " + 5095 "mOldTextStart=" + mOldTextStart + ", " + 5096 "mNewText=" + mNewText + ", " + 5097 "mNewTextStart=" + mNewTextStart + ", " + 5098 "mOldCursorPos=" + mOldCursorPos + ", " + 5099 "mNewCursorPos=" + mNewCursorPos + "]"; 5100 } 5101 5102 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5103 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5104 @Override 5105 public EditOperation createFromParcel(Parcel in) { 5106 return new EditOperation(in, null); 5107 } 5108 5109 @Override 5110 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5111 return new EditOperation(in, loader); 5112 } 5113 5114 @Override 5115 public EditOperation[] newArray(int size) { 5116 return new EditOperation[size]; 5117 } 5118 }; 5119 } 5120} 5121