Editor.java revision f1dad1ea82c5d9ca920af39b81ac6894ff692b99
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.content.UndoManager; 20import android.content.UndoOperation; 21import android.content.UndoOwner; 22import android.os.Build; 23import android.os.Parcel; 24import android.os.Parcelable; 25import android.text.InputFilter; 26import android.text.SpannableString; 27 28import com.android.internal.util.ArrayUtils; 29import com.android.internal.util.GrowingArrayUtils; 30import com.android.internal.view.menu.MenuBuilder; 31import com.android.internal.widget.EditableInputConnection; 32 33import android.R; 34import android.app.PendingIntent; 35import android.app.PendingIntent.CanceledException; 36import android.content.ClipData; 37import android.content.ClipData.Item; 38import android.content.Context; 39import android.content.Intent; 40import android.content.pm.PackageManager; 41import android.content.res.TypedArray; 42import android.graphics.Canvas; 43import android.graphics.Color; 44import android.graphics.Matrix; 45import android.graphics.Paint; 46import android.graphics.Path; 47import android.graphics.Rect; 48import android.graphics.RectF; 49import android.graphics.drawable.Drawable; 50import android.inputmethodservice.ExtractEditText; 51import android.os.Bundle; 52import android.os.Handler; 53import android.os.ParcelableParcel; 54import android.os.SystemClock; 55import android.provider.Settings; 56import android.text.DynamicLayout; 57import android.text.Editable; 58import android.text.InputType; 59import android.text.Layout; 60import android.text.ParcelableSpan; 61import android.text.Selection; 62import android.text.SpanWatcher; 63import android.text.Spannable; 64import android.text.SpannableStringBuilder; 65import android.text.Spanned; 66import android.text.StaticLayout; 67import android.text.TextUtils; 68import android.text.method.KeyListener; 69import android.text.method.MetaKeyKeyListener; 70import android.text.method.MovementMethod; 71import android.text.method.PasswordTransformationMethod; 72import android.text.method.WordIterator; 73import android.text.style.EasyEditSpan; 74import android.text.style.SuggestionRangeSpan; 75import android.text.style.SuggestionSpan; 76import android.text.style.TextAppearanceSpan; 77import android.text.style.URLSpan; 78import android.util.DisplayMetrics; 79import android.util.Log; 80import android.view.ActionMode; 81import android.view.ActionMode.Callback; 82import android.view.RenderNode; 83import android.view.DragEvent; 84import android.view.Gravity; 85import android.view.HardwareCanvas; 86import android.view.LayoutInflater; 87import android.view.Menu; 88import android.view.MenuItem; 89import android.view.MotionEvent; 90import android.view.View; 91import android.view.View.DragShadowBuilder; 92import android.view.View.OnClickListener; 93import android.view.ViewConfiguration; 94import android.view.ViewGroup; 95import android.view.ViewGroup.LayoutParams; 96import android.view.ViewParent; 97import android.view.ViewTreeObserver; 98import android.view.WindowManager; 99import android.view.inputmethod.CorrectionInfo; 100import android.view.inputmethod.CursorAnchorInfo; 101import android.view.inputmethod.EditorInfo; 102import android.view.inputmethod.ExtractedText; 103import android.view.inputmethod.ExtractedTextRequest; 104import android.view.inputmethod.InputConnection; 105import android.view.inputmethod.InputMethodManager; 106import android.widget.AdapterView.OnItemClickListener; 107import android.widget.TextView.Drawables; 108import android.widget.TextView.OnEditorActionListener; 109 110import java.text.BreakIterator; 111import java.util.Arrays; 112import java.util.Comparator; 113import java.util.HashMap; 114 115/** 116 * Helper class used by TextView to handle editable text views. 117 * 118 * @hide 119 */ 120public class Editor { 121 private static final String TAG = "Editor"; 122 private static final boolean DEBUG_UNDO = false; 123 124 static final int BLINK = 500; 125 private static final float[] TEMP_POSITION = new float[2]; 126 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 127 // Tag used when the Editor maintains its own separate UndoManager. 128 private static final String UNDO_OWNER_TAG = "Editor"; 129 130 // Each Editor manages its own undo stack. 131 private final UndoManager mUndoManager = new UndoManager(); 132 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 133 final InputFilter mUndoInputFilter = new UndoInputFilter(this); 134 boolean mAllowUndo = true; 135 136 // Cursor Controllers. 137 InsertionPointCursorController mInsertionPointCursorController; 138 SelectionModifierCursorController mSelectionModifierCursorController; 139 ActionMode mSelectionActionMode; 140 boolean mInsertionControllerEnabled; 141 boolean mSelectionControllerEnabled; 142 143 // Used to highlight a word when it is corrected by the IME 144 CorrectionHighlighter mCorrectionHighlighter; 145 146 InputContentType mInputContentType; 147 InputMethodState mInputMethodState; 148 149 private static class TextDisplayList { 150 RenderNode displayList; 151 boolean isDirty; 152 public TextDisplayList(String name) { 153 isDirty = true; 154 displayList = RenderNode.create(name, null); 155 } 156 boolean needsRecord() { return isDirty || !displayList.isValid(); } 157 } 158 TextDisplayList[] mTextDisplayLists; 159 160 boolean mFrozenWithFocus; 161 boolean mSelectionMoved; 162 boolean mTouchFocusSelected; 163 164 KeyListener mKeyListener; 165 int mInputType = EditorInfo.TYPE_NULL; 166 167 boolean mDiscardNextActionUp; 168 boolean mIgnoreActionUpEvent; 169 170 long mShowCursor; 171 Blink mBlink; 172 173 boolean mCursorVisible = true; 174 boolean mSelectAllOnFocus; 175 boolean mTextIsSelectable; 176 177 CharSequence mError; 178 boolean mErrorWasChanged; 179 ErrorPopup mErrorPopup; 180 181 /** 182 * This flag is set if the TextView tries to display an error before it 183 * is attached to the window (so its position is still unknown). 184 * It causes the error to be shown later, when onAttachedToWindow() 185 * is called. 186 */ 187 boolean mShowErrorAfterAttach; 188 189 boolean mInBatchEditControllers; 190 boolean mShowSoftInputOnFocus = true; 191 boolean mPreserveDetachedSelection; 192 boolean mTemporaryDetach; 193 194 SuggestionsPopupWindow mSuggestionsPopupWindow; 195 SuggestionRangeSpan mSuggestionRangeSpan; 196 Runnable mShowSuggestionRunnable; 197 198 final Drawable[] mCursorDrawable = new Drawable[2]; 199 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 200 201 private Drawable mSelectHandleLeft; 202 private Drawable mSelectHandleRight; 203 private Drawable mSelectHandleCenter; 204 205 // Global listener that detects changes in the global position of the TextView 206 private PositionListener mPositionListener; 207 208 float mLastDownPositionX, mLastDownPositionY; 209 Callback mCustomSelectionActionModeCallback; 210 211 // Set when this TextView gained focus with some text selected. Will start selection mode. 212 boolean mCreatedWithASelection; 213 214 // The span controller helps monitoring the changes to which the Editor needs to react: 215 // - EasyEditSpans, for which we have some UI to display on attach and on hide 216 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 217 private SpanController mSpanController; 218 219 WordIterator mWordIterator; 220 SpellChecker mSpellChecker; 221 222 private Rect mTempRect; 223 224 private TextView mTextView; 225 226 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 227 228 Editor(TextView textView) { 229 mTextView = textView; 230 // Synchronize the filter list, which places the undo input filter at the end. 231 mTextView.setFilters(mTextView.getFilters()); 232 } 233 234 ParcelableParcel saveInstanceState() { 235 // For now there is only undo state. 236 return (ParcelableParcel) mUndoManager.saveInstanceState(); 237 } 238 239 void restoreInstanceState(ParcelableParcel state) { 240 mUndoManager.restoreInstanceState(state); 241 // Re-associate this object as the owner of undo state. 242 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 243 } 244 245 boolean canUndo() { 246 UndoOwner[] owners = { mUndoOwner }; 247 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 248 } 249 250 boolean canRedo() { 251 UndoOwner[] owners = { mUndoOwner }; 252 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 253 } 254 255 void undo() { 256 if (!mAllowUndo) { 257 return; 258 } 259 UndoOwner[] owners = { mUndoOwner }; 260 mUndoManager.undo(owners, 1); // Undo 1 action. 261 } 262 263 void redo() { 264 if (!mAllowUndo) { 265 return; 266 } 267 UndoOwner[] owners = { mUndoOwner }; 268 mUndoManager.redo(owners, 1); // Redo 1 action. 269 } 270 271 void onAttachedToWindow() { 272 if (mShowErrorAfterAttach) { 273 showError(); 274 mShowErrorAfterAttach = false; 275 } 276 mTemporaryDetach = false; 277 278 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 279 // No need to create the controller. 280 // The get method will add the listener on controller creation. 281 if (mInsertionPointCursorController != null) { 282 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 283 } 284 if (mSelectionModifierCursorController != null) { 285 mSelectionModifierCursorController.resetTouchOffsets(); 286 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 287 } 288 updateSpellCheckSpans(0, mTextView.getText().length(), 289 true /* create the spell checker if needed */); 290 291 if (mTextView.hasTransientState() && 292 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 293 // Since transient state is reference counted make sure it stays matched 294 // with our own calls to it for managing selection. 295 // The action mode callback will set this back again when/if the action mode starts. 296 mTextView.setHasTransientState(false); 297 298 // We had an active selection from before, start the selection mode. 299 startSelectionActionMode(); 300 } 301 302 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 303 } 304 305 void onDetachedFromWindow() { 306 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 307 308 if (mError != null) { 309 hideError(); 310 } 311 312 if (mBlink != null) { 313 mBlink.removeCallbacks(mBlink); 314 } 315 316 if (mInsertionPointCursorController != null) { 317 mInsertionPointCursorController.onDetached(); 318 } 319 320 if (mSelectionModifierCursorController != null) { 321 mSelectionModifierCursorController.onDetached(); 322 } 323 324 if (mShowSuggestionRunnable != null) { 325 mTextView.removeCallbacks(mShowSuggestionRunnable); 326 } 327 328 destroyDisplayListsData(); 329 330 if (mSpellChecker != null) { 331 mSpellChecker.closeSession(); 332 // Forces the creation of a new SpellChecker next time this window is created. 333 // Will handle the cases where the settings has been changed in the meantime. 334 mSpellChecker = null; 335 } 336 337 mPreserveDetachedSelection = true; 338 hideControllers(); 339 mPreserveDetachedSelection = false; 340 mTemporaryDetach = false; 341 } 342 343 private void destroyDisplayListsData() { 344 if (mTextDisplayLists != null) { 345 for (int i = 0; i < mTextDisplayLists.length; i++) { 346 RenderNode displayList = mTextDisplayLists[i] != null 347 ? mTextDisplayLists[i].displayList : null; 348 if (displayList != null && displayList.isValid()) { 349 displayList.destroyDisplayListData(); 350 } 351 } 352 } 353 } 354 355 private void showError() { 356 if (mTextView.getWindowToken() == null) { 357 mShowErrorAfterAttach = true; 358 return; 359 } 360 361 if (mErrorPopup == null) { 362 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 363 final TextView err = (TextView) inflater.inflate( 364 com.android.internal.R.layout.textview_hint, null); 365 366 final float scale = mTextView.getResources().getDisplayMetrics().density; 367 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 368 mErrorPopup.setFocusable(false); 369 // The user is entering text, so the input method is needed. We 370 // don't want the popup to be displayed on top of it. 371 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 372 } 373 374 TextView tv = (TextView) mErrorPopup.getContentView(); 375 chooseSize(mErrorPopup, mError, tv); 376 tv.setText(mError); 377 378 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 379 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 380 } 381 382 public void setError(CharSequence error, Drawable icon) { 383 mError = TextUtils.stringOrSpannedString(error); 384 mErrorWasChanged = true; 385 386 if (mError == null) { 387 setErrorIcon(null); 388 if (mErrorPopup != null) { 389 if (mErrorPopup.isShowing()) { 390 mErrorPopup.dismiss(); 391 } 392 393 mErrorPopup = null; 394 } 395 mShowErrorAfterAttach = false; 396 } else { 397 setErrorIcon(icon); 398 if (mTextView.isFocused()) { 399 showError(); 400 } 401 } 402 } 403 404 private void setErrorIcon(Drawable icon) { 405 Drawables dr = mTextView.mDrawables; 406 if (dr == null) { 407 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 408 } 409 dr.setErrorDrawable(icon, mTextView); 410 411 mTextView.resetResolvedDrawables(); 412 mTextView.invalidate(); 413 mTextView.requestLayout(); 414 } 415 416 private void hideError() { 417 if (mErrorPopup != null) { 418 if (mErrorPopup.isShowing()) { 419 mErrorPopup.dismiss(); 420 } 421 } 422 423 mShowErrorAfterAttach = false; 424 } 425 426 /** 427 * Returns the X offset to make the pointy top of the error point 428 * at the middle of the error icon. 429 */ 430 private int getErrorX() { 431 /* 432 * The "25" is the distance between the point and the right edge 433 * of the background 434 */ 435 final float scale = mTextView.getResources().getDisplayMetrics().density; 436 437 final Drawables dr = mTextView.mDrawables; 438 439 final int layoutDirection = mTextView.getLayoutDirection(); 440 int errorX; 441 int offset; 442 switch (layoutDirection) { 443 default: 444 case View.LAYOUT_DIRECTION_LTR: 445 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 446 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 447 mTextView.getPaddingRight() + offset; 448 break; 449 case View.LAYOUT_DIRECTION_RTL: 450 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 451 errorX = mTextView.getPaddingLeft() + offset; 452 break; 453 } 454 return errorX; 455 } 456 457 /** 458 * Returns the Y offset to make the pointy top of the error point 459 * at the bottom of the error icon. 460 */ 461 private int getErrorY() { 462 /* 463 * Compound, not extended, because the icon is not clipped 464 * if the text height is smaller. 465 */ 466 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 467 int vspace = mTextView.getBottom() - mTextView.getTop() - 468 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 469 470 final Drawables dr = mTextView.mDrawables; 471 472 final int layoutDirection = mTextView.getLayoutDirection(); 473 int height; 474 switch (layoutDirection) { 475 default: 476 case View.LAYOUT_DIRECTION_LTR: 477 height = (dr != null ? dr.mDrawableHeightRight : 0); 478 break; 479 case View.LAYOUT_DIRECTION_RTL: 480 height = (dr != null ? dr.mDrawableHeightLeft : 0); 481 break; 482 } 483 484 int icontop = compoundPaddingTop + (vspace - height) / 2; 485 486 /* 487 * The "2" is the distance between the point and the top edge 488 * of the background. 489 */ 490 final float scale = mTextView.getResources().getDisplayMetrics().density; 491 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 492 } 493 494 void createInputContentTypeIfNeeded() { 495 if (mInputContentType == null) { 496 mInputContentType = new InputContentType(); 497 } 498 } 499 500 void createInputMethodStateIfNeeded() { 501 if (mInputMethodState == null) { 502 mInputMethodState = new InputMethodState(); 503 } 504 } 505 506 boolean isCursorVisible() { 507 // The default value is true, even when there is no associated Editor 508 return mCursorVisible && mTextView.isTextEditable(); 509 } 510 511 void prepareCursorControllers() { 512 boolean windowSupportsHandles = false; 513 514 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 515 if (params instanceof WindowManager.LayoutParams) { 516 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 517 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 518 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 519 } 520 521 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 522 mInsertionControllerEnabled = enabled && isCursorVisible(); 523 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 524 525 if (!mInsertionControllerEnabled) { 526 hideInsertionPointCursorController(); 527 if (mInsertionPointCursorController != null) { 528 mInsertionPointCursorController.onDetached(); 529 mInsertionPointCursorController = null; 530 } 531 } 532 533 if (!mSelectionControllerEnabled) { 534 stopSelectionActionMode(); 535 if (mSelectionModifierCursorController != null) { 536 mSelectionModifierCursorController.onDetached(); 537 mSelectionModifierCursorController = null; 538 } 539 } 540 } 541 542 private void hideInsertionPointCursorController() { 543 if (mInsertionPointCursorController != null) { 544 mInsertionPointCursorController.hide(); 545 } 546 } 547 548 /** 549 * Hides the insertion controller and stops text selection mode, hiding the selection controller 550 */ 551 void hideControllers() { 552 hideCursorControllers(); 553 hideSpanControllers(); 554 } 555 556 private void hideSpanControllers() { 557 if (mSpanController != null) { 558 mSpanController.hide(); 559 } 560 } 561 562 private void hideCursorControllers() { 563 if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) { 564 // Should be done before hide insertion point controller since it triggers a show of it 565 mSuggestionsPopupWindow.hide(); 566 } 567 hideInsertionPointCursorController(); 568 stopSelectionActionMode(); 569 } 570 571 /** 572 * Create new SpellCheckSpans on the modified region. 573 */ 574 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 575 // Remove spans whose adjacent characters are text not punctuation 576 mTextView.removeAdjacentSuggestionSpans(start); 577 mTextView.removeAdjacentSuggestionSpans(end); 578 579 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 580 !(mTextView instanceof ExtractEditText)) { 581 if (mSpellChecker == null && createSpellChecker) { 582 mSpellChecker = new SpellChecker(mTextView); 583 } 584 if (mSpellChecker != null) { 585 mSpellChecker.spellCheck(start, end); 586 } 587 } 588 } 589 590 void onScreenStateChanged(int screenState) { 591 switch (screenState) { 592 case View.SCREEN_STATE_ON: 593 resumeBlink(); 594 break; 595 case View.SCREEN_STATE_OFF: 596 suspendBlink(); 597 break; 598 } 599 } 600 601 private void suspendBlink() { 602 if (mBlink != null) { 603 mBlink.cancel(); 604 } 605 } 606 607 private void resumeBlink() { 608 if (mBlink != null) { 609 mBlink.uncancel(); 610 makeBlink(); 611 } 612 } 613 614 void adjustInputType(boolean password, boolean passwordInputType, 615 boolean webPasswordInputType, boolean numberPasswordInputType) { 616 // mInputType has been set from inputType, possibly modified by mInputMethod. 617 // Specialize mInputType to [web]password if we have a text class and the original input 618 // type was a password. 619 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 620 if (password || passwordInputType) { 621 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 622 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 623 } 624 if (webPasswordInputType) { 625 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 626 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 627 } 628 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 629 if (numberPasswordInputType) { 630 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 631 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 632 } 633 } 634 } 635 636 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 637 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 638 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 639 640 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 641 com.android.internal.R.dimen.textview_error_popup_default_width); 642 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 643 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 644 float max = 0; 645 for (int i = 0; i < l.getLineCount(); i++) { 646 max = Math.max(max, l.getLineWidth(i)); 647 } 648 649 /* 650 * Now set the popup size to be big enough for the text plus the border capped 651 * to DEFAULT_MAX_POPUP_WIDTH 652 */ 653 pop.setWidth(wid + (int) Math.ceil(max)); 654 pop.setHeight(ht + l.getHeight()); 655 } 656 657 void setFrame() { 658 if (mErrorPopup != null) { 659 TextView tv = (TextView) mErrorPopup.getContentView(); 660 chooseSize(mErrorPopup, mError, tv); 661 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 662 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 663 } 664 } 665 666 /** 667 * Unlike {@link TextView#textCanBeSelected()}, this method is based on the <i>current</i> state 668 * of the TextView. textCanBeSelected() has to be true (this is one of the conditions to have 669 * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient. 670 */ 671 private boolean canSelectText() { 672 return hasSelectionController() && mTextView.getText().length() != 0; 673 } 674 675 /** 676 * It would be better to rely on the input type for everything. A password inputType should have 677 * a password transformation. We should hence use isPasswordInputType instead of this method. 678 * 679 * We should: 680 * - Call setInputType in setKeyListener instead of changing the input type directly (which 681 * would install the correct transformation). 682 * - Refuse the installation of a non-password transformation in setTransformation if the input 683 * type is password. 684 * 685 * However, this is like this for legacy reasons and we cannot break existing apps. This method 686 * is useful since it matches what the user can see (obfuscated text or not). 687 * 688 * @return true if the current transformation method is of the password type. 689 */ 690 private boolean hasPasswordTransformationMethod() { 691 return mTextView.getTransformationMethod() instanceof PasswordTransformationMethod; 692 } 693 694 /** 695 * Adjusts selection to the word under last touch offset. 696 * Return true if the operation was successfully performed. 697 */ 698 private boolean selectCurrentWord() { 699 if (!canSelectText()) { 700 return false; 701 } 702 703 if (hasPasswordTransformationMethod()) { 704 // Always select all on a password field. 705 // Cut/copy menu entries are not available for passwords, but being able to select all 706 // is however useful to delete or paste to replace the entire content. 707 return mTextView.selectAllText(); 708 } 709 710 int inputType = mTextView.getInputType(); 711 int klass = inputType & InputType.TYPE_MASK_CLASS; 712 int variation = inputType & InputType.TYPE_MASK_VARIATION; 713 714 // Specific text field types: select the entire text for these 715 if (klass == InputType.TYPE_CLASS_NUMBER || 716 klass == InputType.TYPE_CLASS_PHONE || 717 klass == InputType.TYPE_CLASS_DATETIME || 718 variation == InputType.TYPE_TEXT_VARIATION_URI || 719 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 720 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 721 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 722 return mTextView.selectAllText(); 723 } 724 725 long lastTouchOffsets = getLastTouchOffsets(); 726 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 727 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 728 729 // Safety check in case standard touch event handling has been bypassed 730 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 731 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 732 733 int selectionStart, selectionEnd; 734 735 // If a URLSpan (web address, email, phone...) is found at that position, select it. 736 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 737 getSpans(minOffset, maxOffset, URLSpan.class); 738 if (urlSpans.length >= 1) { 739 URLSpan urlSpan = urlSpans[0]; 740 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 741 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 742 } else { 743 final WordIterator wordIterator = getWordIterator(); 744 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 745 746 selectionStart = wordIterator.getBeginning(minOffset); 747 selectionEnd = wordIterator.getEnd(maxOffset); 748 749 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 750 selectionStart == selectionEnd) { 751 // Possible when the word iterator does not properly handle the text's language 752 long range = getCharRange(minOffset); 753 selectionStart = TextUtils.unpackRangeStartFromLong(range); 754 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 755 } 756 } 757 758 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 759 return selectionEnd > selectionStart; 760 } 761 762 void onLocaleChanged() { 763 // Will be re-created on demand in getWordIterator with the proper new locale 764 mWordIterator = null; 765 } 766 767 /** 768 * @hide 769 */ 770 public WordIterator getWordIterator() { 771 if (mWordIterator == null) { 772 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 773 } 774 return mWordIterator; 775 } 776 777 private long getCharRange(int offset) { 778 final int textLength = mTextView.getText().length(); 779 if (offset + 1 < textLength) { 780 final char currentChar = mTextView.getText().charAt(offset); 781 final char nextChar = mTextView.getText().charAt(offset + 1); 782 if (Character.isSurrogatePair(currentChar, nextChar)) { 783 return TextUtils.packRangeInLong(offset, offset + 2); 784 } 785 } 786 if (offset < textLength) { 787 return TextUtils.packRangeInLong(offset, offset + 1); 788 } 789 if (offset - 2 >= 0) { 790 final char previousChar = mTextView.getText().charAt(offset - 1); 791 final char previousPreviousChar = mTextView.getText().charAt(offset - 2); 792 if (Character.isSurrogatePair(previousPreviousChar, previousChar)) { 793 return TextUtils.packRangeInLong(offset - 2, offset); 794 } 795 } 796 if (offset - 1 >= 0) { 797 return TextUtils.packRangeInLong(offset - 1, offset); 798 } 799 return TextUtils.packRangeInLong(offset, offset); 800 } 801 802 private boolean touchPositionIsInSelection() { 803 int selectionStart = mTextView.getSelectionStart(); 804 int selectionEnd = mTextView.getSelectionEnd(); 805 806 if (selectionStart == selectionEnd) { 807 return false; 808 } 809 810 if (selectionStart > selectionEnd) { 811 int tmp = selectionStart; 812 selectionStart = selectionEnd; 813 selectionEnd = tmp; 814 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 815 } 816 817 SelectionModifierCursorController selectionController = getSelectionController(); 818 int minOffset = selectionController.getMinTouchOffset(); 819 int maxOffset = selectionController.getMaxTouchOffset(); 820 821 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 822 } 823 824 private PositionListener getPositionListener() { 825 if (mPositionListener == null) { 826 mPositionListener = new PositionListener(); 827 } 828 return mPositionListener; 829 } 830 831 private interface TextViewPositionListener { 832 public void updatePosition(int parentPositionX, int parentPositionY, 833 boolean parentPositionChanged, boolean parentScrolled); 834 } 835 836 private boolean isPositionVisible(final float positionX, final float positionY) { 837 synchronized (TEMP_POSITION) { 838 final float[] position = TEMP_POSITION; 839 position[0] = positionX; 840 position[1] = positionY; 841 View view = mTextView; 842 843 while (view != null) { 844 if (view != mTextView) { 845 // Local scroll is already taken into account in positionX/Y 846 position[0] -= view.getScrollX(); 847 position[1] -= view.getScrollY(); 848 } 849 850 if (position[0] < 0 || position[1] < 0 || 851 position[0] > view.getWidth() || position[1] > view.getHeight()) { 852 return false; 853 } 854 855 if (!view.getMatrix().isIdentity()) { 856 view.getMatrix().mapPoints(position); 857 } 858 859 position[0] += view.getLeft(); 860 position[1] += view.getTop(); 861 862 final ViewParent parent = view.getParent(); 863 if (parent instanceof View) { 864 view = (View) parent; 865 } else { 866 // We've reached the ViewRoot, stop iterating 867 view = null; 868 } 869 } 870 } 871 872 // We've been able to walk up the view hierarchy and the position was never clipped 873 return true; 874 } 875 876 private boolean isOffsetVisible(int offset) { 877 Layout layout = mTextView.getLayout(); 878 if (layout == null) return false; 879 880 final int line = layout.getLineForOffset(offset); 881 final int lineBottom = layout.getLineBottom(line); 882 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 883 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 884 lineBottom + mTextView.viewportToContentVerticalOffset()); 885 } 886 887 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 888 * in the view. Returns false when the position is in the empty space of left/right of text. 889 */ 890 private boolean isPositionOnText(float x, float y) { 891 Layout layout = mTextView.getLayout(); 892 if (layout == null) return false; 893 894 final int line = mTextView.getLineAtCoordinate(y); 895 x = mTextView.convertToLocalHorizontalCoordinate(x); 896 897 if (x < layout.getLineLeft(line)) return false; 898 if (x > layout.getLineRight(line)) return false; 899 return true; 900 } 901 902 public boolean performLongClick(boolean handled) { 903 // Long press in empty space moves cursor and shows the Paste affordance if available. 904 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 905 mInsertionControllerEnabled) { 906 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 907 mLastDownPositionY); 908 stopSelectionActionMode(); 909 Selection.setSelection((Spannable) mTextView.getText(), offset); 910 getInsertionController().showWithActionPopup(); 911 handled = true; 912 } 913 914 if (!handled && mSelectionActionMode != null) { 915 if (touchPositionIsInSelection()) { 916 // Start a drag 917 final int start = mTextView.getSelectionStart(); 918 final int end = mTextView.getSelectionEnd(); 919 CharSequence selectedText = mTextView.getTransformedText(start, end); 920 ClipData data = ClipData.newPlainText(null, selectedText); 921 DragLocalState localState = new DragLocalState(mTextView, start, end); 922 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0); 923 stopSelectionActionMode(); 924 } else { 925 getSelectionController().hide(); 926 selectCurrentWord(); 927 getSelectionController().show(); 928 } 929 handled = true; 930 } 931 932 // Start a new selection 933 if (!handled) { 934 handled = startSelectionActionMode(); 935 } 936 937 return handled; 938 } 939 940 private long getLastTouchOffsets() { 941 SelectionModifierCursorController selectionController = getSelectionController(); 942 final int minOffset = selectionController.getMinTouchOffset(); 943 final int maxOffset = selectionController.getMaxTouchOffset(); 944 return TextUtils.packRangeInLong(minOffset, maxOffset); 945 } 946 947 void onFocusChanged(boolean focused, int direction) { 948 mShowCursor = SystemClock.uptimeMillis(); 949 ensureEndedBatchEdit(); 950 951 if (focused) { 952 int selStart = mTextView.getSelectionStart(); 953 int selEnd = mTextView.getSelectionEnd(); 954 955 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 956 // mode for these, unless there was a specific selection already started. 957 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 958 selEnd == mTextView.getText().length(); 959 960 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 961 !isFocusHighlighted; 962 963 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 964 // If a tap was used to give focus to that view, move cursor at tap position. 965 // Has to be done before onTakeFocus, which can be overloaded. 966 final int lastTapPosition = getLastTapPosition(); 967 if (lastTapPosition >= 0) { 968 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 969 } 970 971 // Note this may have to be moved out of the Editor class 972 MovementMethod mMovement = mTextView.getMovementMethod(); 973 if (mMovement != null) { 974 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 975 } 976 977 // The DecorView does not have focus when the 'Done' ExtractEditText button is 978 // pressed. Since it is the ViewAncestor's mView, it requests focus before 979 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 980 // This special case ensure that we keep current selection in that case. 981 // It would be better to know why the DecorView does not have focus at that time. 982 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 983 selStart >= 0 && selEnd >= 0) { 984 /* 985 * Someone intentionally set the selection, so let them 986 * do whatever it is that they wanted to do instead of 987 * the default on-focus behavior. We reset the selection 988 * here instead of just skipping the onTakeFocus() call 989 * because some movement methods do something other than 990 * just setting the selection in theirs and we still 991 * need to go through that path. 992 */ 993 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 994 } 995 996 if (mSelectAllOnFocus) { 997 mTextView.selectAllText(); 998 } 999 1000 mTouchFocusSelected = true; 1001 } 1002 1003 mFrozenWithFocus = false; 1004 mSelectionMoved = false; 1005 1006 if (mError != null) { 1007 showError(); 1008 } 1009 1010 makeBlink(); 1011 } else { 1012 if (mError != null) { 1013 hideError(); 1014 } 1015 // Don't leave us in the middle of a batch edit. 1016 mTextView.onEndBatchEdit(); 1017 1018 if (mTextView instanceof ExtractEditText) { 1019 // terminateTextSelectionMode removes selection, which we want to keep when 1020 // ExtractEditText goes out of focus. 1021 final int selStart = mTextView.getSelectionStart(); 1022 final int selEnd = mTextView.getSelectionEnd(); 1023 hideControllers(); 1024 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1025 } else { 1026 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1027 hideControllers(); 1028 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1029 downgradeEasyCorrectionSpans(); 1030 } 1031 1032 // No need to create the controller 1033 if (mSelectionModifierCursorController != null) { 1034 mSelectionModifierCursorController.resetTouchOffsets(); 1035 } 1036 } 1037 } 1038 1039 /** 1040 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1041 * span. 1042 */ 1043 private void downgradeEasyCorrectionSpans() { 1044 CharSequence text = mTextView.getText(); 1045 if (text instanceof Spannable) { 1046 Spannable spannable = (Spannable) text; 1047 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1048 spannable.length(), SuggestionSpan.class); 1049 for (int i = 0; i < suggestionSpans.length; i++) { 1050 int flags = suggestionSpans[i].getFlags(); 1051 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1052 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1053 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1054 suggestionSpans[i].setFlags(flags); 1055 } 1056 } 1057 } 1058 } 1059 1060 void sendOnTextChanged(int start, int after) { 1061 updateSpellCheckSpans(start, start + after, false); 1062 1063 // Hide the controllers as soon as text is modified (typing, procedural...) 1064 // We do not hide the span controllers, since they can be added when a new text is 1065 // inserted into the text view (voice IME). 1066 hideCursorControllers(); 1067 } 1068 1069 private int getLastTapPosition() { 1070 // No need to create the controller at that point, no last tap position saved 1071 if (mSelectionModifierCursorController != null) { 1072 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1073 if (lastTapPosition >= 0) { 1074 // Safety check, should not be possible. 1075 if (lastTapPosition > mTextView.getText().length()) { 1076 lastTapPosition = mTextView.getText().length(); 1077 } 1078 return lastTapPosition; 1079 } 1080 } 1081 1082 return -1; 1083 } 1084 1085 void onWindowFocusChanged(boolean hasWindowFocus) { 1086 if (hasWindowFocus) { 1087 if (mBlink != null) { 1088 mBlink.uncancel(); 1089 makeBlink(); 1090 } 1091 } else { 1092 if (mBlink != null) { 1093 mBlink.cancel(); 1094 } 1095 if (mInputContentType != null) { 1096 mInputContentType.enterDown = false; 1097 } 1098 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1099 hideControllers(); 1100 if (mSuggestionsPopupWindow != null) { 1101 mSuggestionsPopupWindow.onParentLostFocus(); 1102 } 1103 1104 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1105 ensureEndedBatchEdit(); 1106 } 1107 } 1108 1109 void onTouchEvent(MotionEvent event) { 1110 if (hasSelectionController()) { 1111 getSelectionController().onTouchEvent(event); 1112 } 1113 1114 if (mShowSuggestionRunnable != null) { 1115 mTextView.removeCallbacks(mShowSuggestionRunnable); 1116 mShowSuggestionRunnable = null; 1117 } 1118 1119 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1120 mLastDownPositionX = event.getX(); 1121 mLastDownPositionY = event.getY(); 1122 1123 // Reset this state; it will be re-set if super.onTouchEvent 1124 // causes focus to move to the view. 1125 mTouchFocusSelected = false; 1126 mIgnoreActionUpEvent = false; 1127 } 1128 } 1129 1130 public void beginBatchEdit() { 1131 mInBatchEditControllers = true; 1132 final InputMethodState ims = mInputMethodState; 1133 if (ims != null) { 1134 int nesting = ++ims.mBatchEditNesting; 1135 if (nesting == 1) { 1136 ims.mCursorChanged = false; 1137 ims.mChangedDelta = 0; 1138 if (ims.mContentChanged) { 1139 // We already have a pending change from somewhere else, 1140 // so turn this into a full update. 1141 ims.mChangedStart = 0; 1142 ims.mChangedEnd = mTextView.getText().length(); 1143 } else { 1144 ims.mChangedStart = EXTRACT_UNKNOWN; 1145 ims.mChangedEnd = EXTRACT_UNKNOWN; 1146 ims.mContentChanged = false; 1147 } 1148 mTextView.onBeginBatchEdit(); 1149 } 1150 } 1151 } 1152 1153 public void endBatchEdit() { 1154 mInBatchEditControllers = false; 1155 final InputMethodState ims = mInputMethodState; 1156 if (ims != null) { 1157 int nesting = --ims.mBatchEditNesting; 1158 if (nesting == 0) { 1159 finishBatchEdit(ims); 1160 } 1161 } 1162 } 1163 1164 void ensureEndedBatchEdit() { 1165 final InputMethodState ims = mInputMethodState; 1166 if (ims != null && ims.mBatchEditNesting != 0) { 1167 ims.mBatchEditNesting = 0; 1168 finishBatchEdit(ims); 1169 } 1170 } 1171 1172 void finishBatchEdit(final InputMethodState ims) { 1173 mTextView.onEndBatchEdit(); 1174 1175 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1176 mTextView.updateAfterEdit(); 1177 reportExtractedText(); 1178 } else if (ims.mCursorChanged) { 1179 // Cheesy way to get us to report the current cursor location. 1180 mTextView.invalidateCursor(); 1181 } 1182 // sendUpdateSelection knows to avoid sending if the selection did 1183 // not actually change. 1184 sendUpdateSelection(); 1185 } 1186 1187 static final int EXTRACT_NOTHING = -2; 1188 static final int EXTRACT_UNKNOWN = -1; 1189 1190 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1191 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1192 EXTRACT_UNKNOWN, outText); 1193 } 1194 1195 private boolean extractTextInternal(ExtractedTextRequest request, 1196 int partialStartOffset, int partialEndOffset, int delta, 1197 ExtractedText outText) { 1198 final CharSequence content = mTextView.getText(); 1199 if (content != null) { 1200 if (partialStartOffset != EXTRACT_NOTHING) { 1201 final int N = content.length(); 1202 if (partialStartOffset < 0) { 1203 outText.partialStartOffset = outText.partialEndOffset = -1; 1204 partialStartOffset = 0; 1205 partialEndOffset = N; 1206 } else { 1207 // Now use the delta to determine the actual amount of text 1208 // we need. 1209 partialEndOffset += delta; 1210 // Adjust offsets to ensure we contain full spans. 1211 if (content instanceof Spanned) { 1212 Spanned spanned = (Spanned)content; 1213 Object[] spans = spanned.getSpans(partialStartOffset, 1214 partialEndOffset, ParcelableSpan.class); 1215 int i = spans.length; 1216 while (i > 0) { 1217 i--; 1218 int j = spanned.getSpanStart(spans[i]); 1219 if (j < partialStartOffset) partialStartOffset = j; 1220 j = spanned.getSpanEnd(spans[i]); 1221 if (j > partialEndOffset) partialEndOffset = j; 1222 } 1223 } 1224 outText.partialStartOffset = partialStartOffset; 1225 outText.partialEndOffset = partialEndOffset - delta; 1226 1227 if (partialStartOffset > N) { 1228 partialStartOffset = N; 1229 } else if (partialStartOffset < 0) { 1230 partialStartOffset = 0; 1231 } 1232 if (partialEndOffset > N) { 1233 partialEndOffset = N; 1234 } else if (partialEndOffset < 0) { 1235 partialEndOffset = 0; 1236 } 1237 } 1238 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1239 outText.text = content.subSequence(partialStartOffset, 1240 partialEndOffset); 1241 } else { 1242 outText.text = TextUtils.substring(content, partialStartOffset, 1243 partialEndOffset); 1244 } 1245 } else { 1246 outText.partialStartOffset = 0; 1247 outText.partialEndOffset = 0; 1248 outText.text = ""; 1249 } 1250 outText.flags = 0; 1251 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1252 outText.flags |= ExtractedText.FLAG_SELECTING; 1253 } 1254 if (mTextView.isSingleLine()) { 1255 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1256 } 1257 outText.startOffset = 0; 1258 outText.selectionStart = mTextView.getSelectionStart(); 1259 outText.selectionEnd = mTextView.getSelectionEnd(); 1260 return true; 1261 } 1262 return false; 1263 } 1264 1265 boolean reportExtractedText() { 1266 final Editor.InputMethodState ims = mInputMethodState; 1267 if (ims != null) { 1268 final boolean contentChanged = ims.mContentChanged; 1269 if (contentChanged || ims.mSelectionModeChanged) { 1270 ims.mContentChanged = false; 1271 ims.mSelectionModeChanged = false; 1272 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1273 if (req != null) { 1274 InputMethodManager imm = InputMethodManager.peekInstance(); 1275 if (imm != null) { 1276 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1277 "Retrieving extracted start=" + ims.mChangedStart + 1278 " end=" + ims.mChangedEnd + 1279 " delta=" + ims.mChangedDelta); 1280 if (ims.mChangedStart < 0 && !contentChanged) { 1281 ims.mChangedStart = EXTRACT_NOTHING; 1282 } 1283 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1284 ims.mChangedDelta, ims.mExtractedText)) { 1285 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1286 "Reporting extracted start=" + 1287 ims.mExtractedText.partialStartOffset + 1288 " end=" + ims.mExtractedText.partialEndOffset + 1289 ": " + ims.mExtractedText.text); 1290 1291 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1292 ims.mChangedStart = EXTRACT_UNKNOWN; 1293 ims.mChangedEnd = EXTRACT_UNKNOWN; 1294 ims.mChangedDelta = 0; 1295 ims.mContentChanged = false; 1296 return true; 1297 } 1298 } 1299 } 1300 } 1301 } 1302 return false; 1303 } 1304 1305 private void sendUpdateSelection() { 1306 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1307 final InputMethodManager imm = InputMethodManager.peekInstance(); 1308 if (null != imm) { 1309 final int selectionStart = mTextView.getSelectionStart(); 1310 final int selectionEnd = mTextView.getSelectionEnd(); 1311 int candStart = -1; 1312 int candEnd = -1; 1313 if (mTextView.getText() instanceof Spannable) { 1314 final Spannable sp = (Spannable) mTextView.getText(); 1315 candStart = EditableInputConnection.getComposingSpanStart(sp); 1316 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1317 } 1318 // InputMethodManager#updateSelection skips sending the message if 1319 // none of the parameters have changed since the last time we called it. 1320 imm.updateSelection(mTextView, 1321 selectionStart, selectionEnd, candStart, candEnd); 1322 } 1323 } 1324 } 1325 1326 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1327 int cursorOffsetVertical) { 1328 final int selectionStart = mTextView.getSelectionStart(); 1329 final int selectionEnd = mTextView.getSelectionEnd(); 1330 1331 final InputMethodState ims = mInputMethodState; 1332 if (ims != null && ims.mBatchEditNesting == 0) { 1333 InputMethodManager imm = InputMethodManager.peekInstance(); 1334 if (imm != null) { 1335 if (imm.isActive(mTextView)) { 1336 boolean reported = false; 1337 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1338 // We are in extract mode and the content has changed 1339 // in some way... just report complete new text to the 1340 // input method. 1341 reported = reportExtractedText(); 1342 } 1343 } 1344 } 1345 } 1346 1347 if (mCorrectionHighlighter != null) { 1348 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1349 } 1350 1351 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1352 drawCursor(canvas, cursorOffsetVertical); 1353 // Rely on the drawable entirely, do not draw the cursor line. 1354 // Has to be done after the IMM related code above which relies on the highlight. 1355 highlight = null; 1356 } 1357 1358 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1359 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1360 cursorOffsetVertical); 1361 } else { 1362 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1363 } 1364 } 1365 1366 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1367 Paint highlightPaint, int cursorOffsetVertical) { 1368 final long lineRange = layout.getLineRangeForDraw(canvas); 1369 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1370 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1371 if (lastLine < 0) return; 1372 1373 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1374 firstLine, lastLine); 1375 1376 if (layout instanceof DynamicLayout) { 1377 if (mTextDisplayLists == null) { 1378 mTextDisplayLists = ArrayUtils.emptyArray(TextDisplayList.class); 1379 } 1380 1381 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1382 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1383 int[] blockIndices = dynamicLayout.getBlockIndices(); 1384 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1385 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1386 1387 int endOfPreviousBlock = -1; 1388 int searchStartIndex = 0; 1389 for (int i = 0; i < numberOfBlocks; i++) { 1390 int blockEndLine = blockEndLines[i]; 1391 int blockIndex = blockIndices[i]; 1392 1393 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1394 if (blockIsInvalid) { 1395 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1396 searchStartIndex); 1397 // Note how dynamic layout's internal block indices get updated from Editor 1398 blockIndices[i] = blockIndex; 1399 if (mTextDisplayLists[blockIndex] != null) { 1400 mTextDisplayLists[blockIndex].isDirty = true; 1401 } 1402 searchStartIndex = blockIndex + 1; 1403 } 1404 1405 if (mTextDisplayLists[blockIndex] == null) { 1406 mTextDisplayLists[blockIndex] = 1407 new TextDisplayList("Text " + blockIndex); 1408 } 1409 1410 final boolean blockDisplayListIsInvalid = mTextDisplayLists[blockIndex].needsRecord(); 1411 RenderNode blockDisplayList = mTextDisplayLists[blockIndex].displayList; 1412 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1413 final int blockBeginLine = endOfPreviousBlock + 1; 1414 final int top = layout.getLineTop(blockBeginLine); 1415 final int bottom = layout.getLineBottom(blockEndLine); 1416 int left = 0; 1417 int right = mTextView.getWidth(); 1418 if (mTextView.getHorizontallyScrolling()) { 1419 float min = Float.MAX_VALUE; 1420 float max = Float.MIN_VALUE; 1421 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1422 min = Math.min(min, layout.getLineLeft(line)); 1423 max = Math.max(max, layout.getLineRight(line)); 1424 } 1425 left = (int) min; 1426 right = (int) (max + 0.5f); 1427 } 1428 1429 // Rebuild display list if it is invalid 1430 if (blockDisplayListIsInvalid) { 1431 final HardwareCanvas hardwareCanvas = blockDisplayList.start( 1432 right - left, bottom - top); 1433 try { 1434 // drawText is always relative to TextView's origin, this translation 1435 // brings this range of text back to the top left corner of the viewport 1436 hardwareCanvas.translate(-left, -top); 1437 layout.drawText(hardwareCanvas, blockBeginLine, blockEndLine); 1438 mTextDisplayLists[blockIndex].isDirty = false; 1439 // No need to untranslate, previous context is popped after 1440 // drawDisplayList 1441 } finally { 1442 blockDisplayList.end(hardwareCanvas); 1443 // Same as drawDisplayList below, handled by our TextView's parent 1444 blockDisplayList.setClipToBounds(false); 1445 } 1446 } 1447 1448 // Valid disply list whose index is >= indexFirstChangedBlock 1449 // only needs to update its drawing location. 1450 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1451 } 1452 1453 ((HardwareCanvas) canvas).drawRenderNode(blockDisplayList, 1454 0 /* no child clipping, our TextView parent enforces it */); 1455 1456 endOfPreviousBlock = blockEndLine; 1457 } 1458 1459 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1460 } else { 1461 // Boring layout is used for empty and hint text 1462 layout.drawText(canvas, firstLine, lastLine); 1463 } 1464 } 1465 1466 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1467 int searchStartIndex) { 1468 int length = mTextDisplayLists.length; 1469 for (int i = searchStartIndex; i < length; i++) { 1470 boolean blockIndexFound = false; 1471 for (int j = 0; j < numberOfBlocks; j++) { 1472 if (blockIndices[j] == i) { 1473 blockIndexFound = true; 1474 break; 1475 } 1476 } 1477 if (blockIndexFound) continue; 1478 return i; 1479 } 1480 1481 // No available index found, the pool has to grow 1482 mTextDisplayLists = GrowingArrayUtils.append(mTextDisplayLists, length, null); 1483 return length; 1484 } 1485 1486 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1487 final boolean translate = cursorOffsetVertical != 0; 1488 if (translate) canvas.translate(0, cursorOffsetVertical); 1489 for (int i = 0; i < mCursorCount; i++) { 1490 mCursorDrawable[i].draw(canvas); 1491 } 1492 if (translate) canvas.translate(0, -cursorOffsetVertical); 1493 } 1494 1495 /** 1496 * Invalidates all the sub-display lists that overlap the specified character range 1497 */ 1498 void invalidateTextDisplayList(Layout layout, int start, int end) { 1499 if (mTextDisplayLists != null && layout instanceof DynamicLayout) { 1500 final int firstLine = layout.getLineForOffset(start); 1501 final int lastLine = layout.getLineForOffset(end); 1502 1503 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1504 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1505 int[] blockIndices = dynamicLayout.getBlockIndices(); 1506 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1507 1508 int i = 0; 1509 // Skip the blocks before firstLine 1510 while (i < numberOfBlocks) { 1511 if (blockEndLines[i] >= firstLine) break; 1512 i++; 1513 } 1514 1515 // Invalidate all subsequent blocks until lastLine is passed 1516 while (i < numberOfBlocks) { 1517 final int blockIndex = blockIndices[i]; 1518 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1519 mTextDisplayLists[blockIndex].isDirty = true; 1520 } 1521 if (blockEndLines[i] >= lastLine) break; 1522 i++; 1523 } 1524 } 1525 } 1526 1527 void invalidateTextDisplayList() { 1528 if (mTextDisplayLists != null) { 1529 for (int i = 0; i < mTextDisplayLists.length; i++) { 1530 if (mTextDisplayLists[i] != null) mTextDisplayLists[i].isDirty = true; 1531 } 1532 } 1533 } 1534 1535 void updateCursorsPositions() { 1536 if (mTextView.mCursorDrawableRes == 0) { 1537 mCursorCount = 0; 1538 return; 1539 } 1540 1541 Layout layout = mTextView.getLayout(); 1542 Layout hintLayout = mTextView.getHintLayout(); 1543 final int offset = mTextView.getSelectionStart(); 1544 final int line = layout.getLineForOffset(offset); 1545 final int top = layout.getLineTop(line); 1546 final int bottom = layout.getLineTop(line + 1); 1547 1548 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1549 1550 int middle = bottom; 1551 if (mCursorCount == 2) { 1552 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1553 middle = (top + bottom) >> 1; 1554 } 1555 1556 boolean clamped = layout.shouldClampCursor(line); 1557 updateCursorPosition(0, top, middle, 1558 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1559 1560 if (mCursorCount == 2) { 1561 updateCursorPosition(1, middle, bottom, 1562 layout.getSecondaryHorizontal(offset, clamped)); 1563 } 1564 } 1565 1566 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1567 boolean clamped) { 1568 if (TextUtils.isEmpty(layout.getText()) && 1569 hintLayout != null && 1570 !TextUtils.isEmpty(hintLayout.getText())) { 1571 return hintLayout.getPrimaryHorizontal(offset, clamped); 1572 } else { 1573 return layout.getPrimaryHorizontal(offset, clamped); 1574 } 1575 } 1576 1577 /** 1578 * @return true if the selection mode was actually started. 1579 */ 1580 boolean startSelectionActionMode() { 1581 if (mSelectionActionMode != null) { 1582 // Selection action mode is already started 1583 return false; 1584 } 1585 1586 if (!canSelectText() || !mTextView.requestFocus()) { 1587 Log.w(TextView.LOG_TAG, 1588 "TextView does not support text selection. Action mode cancelled."); 1589 return false; 1590 } 1591 1592 if (!mTextView.hasSelection()) { 1593 // There may already be a selection on device rotation 1594 if (!selectCurrentWord()) { 1595 // No word found under cursor or text selection not permitted. 1596 return false; 1597 } 1598 } 1599 1600 boolean willExtract = extractedTextModeWillBeStarted(); 1601 1602 // Do not start the action mode when extracted text will show up full screen, which would 1603 // immediately hide the newly created action bar and would be visually distracting. 1604 if (!willExtract) { 1605 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1606 mSelectionActionMode = mTextView.startActionMode(actionModeCallback); 1607 } 1608 1609 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1610 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1611 // Show the IME to be able to replace text, except when selecting non editable text. 1612 final InputMethodManager imm = InputMethodManager.peekInstance(); 1613 if (imm != null) { 1614 imm.showSoftInput(mTextView, 0, null); 1615 } 1616 } 1617 1618 return selectionStarted; 1619 } 1620 1621 private boolean extractedTextModeWillBeStarted() { 1622 if (!(mTextView instanceof ExtractEditText)) { 1623 final InputMethodManager imm = InputMethodManager.peekInstance(); 1624 return imm != null && imm.isFullscreenMode(); 1625 } 1626 return false; 1627 } 1628 1629 /** 1630 * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}. 1631 */ 1632 private boolean isCursorInsideSuggestionSpan() { 1633 CharSequence text = mTextView.getText(); 1634 if (!(text instanceof Spannable)) return false; 1635 1636 SuggestionSpan[] suggestionSpans = ((Spannable) text).getSpans( 1637 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), SuggestionSpan.class); 1638 return (suggestionSpans.length > 0); 1639 } 1640 1641 /** 1642 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1643 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1644 */ 1645 private boolean isCursorInsideEasyCorrectionSpan() { 1646 Spannable spannable = (Spannable) mTextView.getText(); 1647 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1648 mTextView.getSelectionEnd(), SuggestionSpan.class); 1649 for (int i = 0; i < suggestionSpans.length; i++) { 1650 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1651 return true; 1652 } 1653 } 1654 return false; 1655 } 1656 1657 void onTouchUpEvent(MotionEvent event) { 1658 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1659 hideControllers(); 1660 CharSequence text = mTextView.getText(); 1661 if (!selectAllGotFocus && text.length() > 0) { 1662 // Move cursor 1663 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1664 Selection.setSelection((Spannable) text, offset); 1665 if (mSpellChecker != null) { 1666 // When the cursor moves, the word that was typed may need spell check 1667 mSpellChecker.onSelectionChanged(); 1668 } 1669 if (!extractedTextModeWillBeStarted()) { 1670 if (isCursorInsideEasyCorrectionSpan()) { 1671 mShowSuggestionRunnable = new Runnable() { 1672 public void run() { 1673 showSuggestions(); 1674 } 1675 }; 1676 // removeCallbacks is performed on every touch 1677 mTextView.postDelayed(mShowSuggestionRunnable, 1678 ViewConfiguration.getDoubleTapTimeout()); 1679 } else if (hasInsertionController()) { 1680 getInsertionController().show(); 1681 } 1682 } 1683 } 1684 } 1685 1686 protected void stopSelectionActionMode() { 1687 if (mSelectionActionMode != null) { 1688 // This will hide the mSelectionModifierCursorController 1689 mSelectionActionMode.finish(); 1690 } 1691 } 1692 1693 /** 1694 * @return True if this view supports insertion handles. 1695 */ 1696 boolean hasInsertionController() { 1697 return mInsertionControllerEnabled; 1698 } 1699 1700 /** 1701 * @return True if this view supports selection handles. 1702 */ 1703 boolean hasSelectionController() { 1704 return mSelectionControllerEnabled; 1705 } 1706 1707 InsertionPointCursorController getInsertionController() { 1708 if (!mInsertionControllerEnabled) { 1709 return null; 1710 } 1711 1712 if (mInsertionPointCursorController == null) { 1713 mInsertionPointCursorController = new InsertionPointCursorController(); 1714 1715 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1716 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1717 } 1718 1719 return mInsertionPointCursorController; 1720 } 1721 1722 SelectionModifierCursorController getSelectionController() { 1723 if (!mSelectionControllerEnabled) { 1724 return null; 1725 } 1726 1727 if (mSelectionModifierCursorController == null) { 1728 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1729 1730 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1731 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1732 } 1733 1734 return mSelectionModifierCursorController; 1735 } 1736 1737 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1738 if (mCursorDrawable[cursorIndex] == null) 1739 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1740 mTextView.mCursorDrawableRes); 1741 1742 if (mTempRect == null) mTempRect = new Rect(); 1743 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1744 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1745 horizontal = Math.max(0.5f, horizontal - 0.5f); 1746 final int left = (int) (horizontal) - mTempRect.left; 1747 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1748 bottom + mTempRect.bottom); 1749 } 1750 1751 /** 1752 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1753 * a dictionary) from the current input method, provided by it calling 1754 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1755 * implementation flashes the background of the corrected word to provide feedback to the user. 1756 * 1757 * @param info The auto correct info about the text that was corrected. 1758 */ 1759 public void onCommitCorrection(CorrectionInfo info) { 1760 if (mCorrectionHighlighter == null) { 1761 mCorrectionHighlighter = new CorrectionHighlighter(); 1762 } else { 1763 mCorrectionHighlighter.invalidate(false); 1764 } 1765 1766 mCorrectionHighlighter.highlight(info); 1767 } 1768 1769 void showSuggestions() { 1770 if (mSuggestionsPopupWindow == null) { 1771 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1772 } 1773 hideControllers(); 1774 mSuggestionsPopupWindow.show(); 1775 } 1776 1777 boolean areSuggestionsShown() { 1778 return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing(); 1779 } 1780 1781 void onScrollChanged() { 1782 if (mPositionListener != null) { 1783 mPositionListener.onScrollChanged(); 1784 } 1785 } 1786 1787 /** 1788 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1789 */ 1790 private boolean shouldBlink() { 1791 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1792 1793 final int start = mTextView.getSelectionStart(); 1794 if (start < 0) return false; 1795 1796 final int end = mTextView.getSelectionEnd(); 1797 if (end < 0) return false; 1798 1799 return start == end; 1800 } 1801 1802 void makeBlink() { 1803 if (shouldBlink()) { 1804 mShowCursor = SystemClock.uptimeMillis(); 1805 if (mBlink == null) mBlink = new Blink(); 1806 mBlink.removeCallbacks(mBlink); 1807 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 1808 } else { 1809 if (mBlink != null) mBlink.removeCallbacks(mBlink); 1810 } 1811 } 1812 1813 private class Blink extends Handler implements Runnable { 1814 private boolean mCancelled; 1815 1816 public void run() { 1817 if (mCancelled) { 1818 return; 1819 } 1820 1821 removeCallbacks(Blink.this); 1822 1823 if (shouldBlink()) { 1824 if (mTextView.getLayout() != null) { 1825 mTextView.invalidateCursorPath(); 1826 } 1827 1828 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 1829 } 1830 } 1831 1832 void cancel() { 1833 if (!mCancelled) { 1834 removeCallbacks(Blink.this); 1835 mCancelled = true; 1836 } 1837 } 1838 1839 void uncancel() { 1840 mCancelled = false; 1841 } 1842 } 1843 1844 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 1845 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 1846 com.android.internal.R.layout.text_drag_thumbnail, null); 1847 1848 if (shadowView == null) { 1849 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 1850 } 1851 1852 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 1853 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 1854 } 1855 shadowView.setText(text); 1856 shadowView.setTextColor(mTextView.getTextColors()); 1857 1858 shadowView.setTextAppearance(mTextView.getContext(), R.styleable.Theme_textAppearanceLarge); 1859 shadowView.setGravity(Gravity.CENTER); 1860 1861 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 1862 ViewGroup.LayoutParams.WRAP_CONTENT)); 1863 1864 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 1865 shadowView.measure(size, size); 1866 1867 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 1868 shadowView.invalidate(); 1869 return new DragShadowBuilder(shadowView); 1870 } 1871 1872 private static class DragLocalState { 1873 public TextView sourceTextView; 1874 public int start, end; 1875 1876 public DragLocalState(TextView sourceTextView, int start, int end) { 1877 this.sourceTextView = sourceTextView; 1878 this.start = start; 1879 this.end = end; 1880 } 1881 } 1882 1883 void onDrop(DragEvent event) { 1884 StringBuilder content = new StringBuilder(""); 1885 ClipData clipData = event.getClipData(); 1886 final int itemCount = clipData.getItemCount(); 1887 for (int i=0; i < itemCount; i++) { 1888 Item item = clipData.getItemAt(i); 1889 content.append(item.coerceToStyledText(mTextView.getContext())); 1890 } 1891 1892 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1893 1894 Object localState = event.getLocalState(); 1895 DragLocalState dragLocalState = null; 1896 if (localState instanceof DragLocalState) { 1897 dragLocalState = (DragLocalState) localState; 1898 } 1899 boolean dragDropIntoItself = dragLocalState != null && 1900 dragLocalState.sourceTextView == mTextView; 1901 1902 if (dragDropIntoItself) { 1903 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 1904 // A drop inside the original selection discards the drop. 1905 return; 1906 } 1907 } 1908 1909 final int originalLength = mTextView.getText().length(); 1910 int min = offset; 1911 int max = offset; 1912 1913 Selection.setSelection((Spannable) mTextView.getText(), max); 1914 mTextView.replaceText_internal(min, max, content); 1915 1916 if (dragDropIntoItself) { 1917 int dragSourceStart = dragLocalState.start; 1918 int dragSourceEnd = dragLocalState.end; 1919 if (max <= dragSourceStart) { 1920 // Inserting text before selection has shifted positions 1921 final int shift = mTextView.getText().length() - originalLength; 1922 dragSourceStart += shift; 1923 dragSourceEnd += shift; 1924 } 1925 1926 // Delete original selection 1927 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 1928 1929 // Make sure we do not leave two adjacent spaces. 1930 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 1931 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 1932 if (nextCharIdx > prevCharIdx + 1) { 1933 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 1934 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 1935 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 1936 } 1937 } 1938 } 1939 } 1940 1941 public void addSpanWatchers(Spannable text) { 1942 final int textLength = text.length(); 1943 1944 if (mKeyListener != null) { 1945 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 1946 } 1947 1948 if (mSpanController == null) { 1949 mSpanController = new SpanController(); 1950 } 1951 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 1952 } 1953 1954 /** 1955 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 1956 * pop-up should be displayed. 1957 * Also monitors {@link Selection} to call back to the attached input method. 1958 */ 1959 class SpanController implements SpanWatcher { 1960 1961 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 1962 1963 private EasyEditPopupWindow mPopupWindow; 1964 1965 private Runnable mHidePopup; 1966 1967 // This function is pure but inner classes can't have static functions 1968 private boolean isNonIntermediateSelectionSpan(final Spannable text, 1969 final Object span) { 1970 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 1971 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 1972 } 1973 1974 @Override 1975 public void onSpanAdded(Spannable text, Object span, int start, int end) { 1976 if (isNonIntermediateSelectionSpan(text, span)) { 1977 sendUpdateSelection(); 1978 } else if (span instanceof EasyEditSpan) { 1979 if (mPopupWindow == null) { 1980 mPopupWindow = new EasyEditPopupWindow(); 1981 mHidePopup = new Runnable() { 1982 @Override 1983 public void run() { 1984 hide(); 1985 } 1986 }; 1987 } 1988 1989 // Make sure there is only at most one EasyEditSpan in the text 1990 if (mPopupWindow.mEasyEditSpan != null) { 1991 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 1992 } 1993 1994 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 1995 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 1996 @Override 1997 public void onDeleteClick(EasyEditSpan span) { 1998 Editable editable = (Editable) mTextView.getText(); 1999 int start = editable.getSpanStart(span); 2000 int end = editable.getSpanEnd(span); 2001 if (start >= 0 && end >= 0) { 2002 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2003 mTextView.deleteText_internal(start, end); 2004 } 2005 editable.removeSpan(span); 2006 } 2007 }); 2008 2009 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2010 // The window is not visible yet, ignore the text change. 2011 return; 2012 } 2013 2014 if (mTextView.getLayout() == null) { 2015 // The view has not been laid out yet, ignore the text change 2016 return; 2017 } 2018 2019 if (extractedTextModeWillBeStarted()) { 2020 // The input is in extract mode. Do not handle the easy edit in 2021 // the original TextView, as the ExtractEditText will do 2022 return; 2023 } 2024 2025 mPopupWindow.show(); 2026 mTextView.removeCallbacks(mHidePopup); 2027 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2028 } 2029 } 2030 2031 @Override 2032 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2033 if (isNonIntermediateSelectionSpan(text, span)) { 2034 sendUpdateSelection(); 2035 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2036 hide(); 2037 } 2038 } 2039 2040 @Override 2041 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2042 int newStart, int newEnd) { 2043 if (isNonIntermediateSelectionSpan(text, span)) { 2044 sendUpdateSelection(); 2045 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2046 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2047 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2048 text.removeSpan(easyEditSpan); 2049 } 2050 } 2051 2052 public void hide() { 2053 if (mPopupWindow != null) { 2054 mPopupWindow.hide(); 2055 mTextView.removeCallbacks(mHidePopup); 2056 } 2057 } 2058 2059 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2060 try { 2061 PendingIntent pendingIntent = span.getPendingIntent(); 2062 if (pendingIntent != null) { 2063 Intent intent = new Intent(); 2064 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2065 pendingIntent.send(mTextView.getContext(), 0, intent); 2066 } 2067 } catch (CanceledException e) { 2068 // This should not happen, as we should try to send the intent only once. 2069 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2070 } 2071 } 2072 } 2073 2074 /** 2075 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2076 */ 2077 private interface EasyEditDeleteListener { 2078 2079 /** 2080 * Clicks the delete pop-up. 2081 */ 2082 void onDeleteClick(EasyEditSpan span); 2083 } 2084 2085 /** 2086 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2087 * by {@link SpanController}. 2088 */ 2089 private class EasyEditPopupWindow extends PinnedPopupWindow 2090 implements OnClickListener { 2091 private static final int POPUP_TEXT_LAYOUT = 2092 com.android.internal.R.layout.text_edit_action_popup_text; 2093 private TextView mDeleteTextView; 2094 private EasyEditSpan mEasyEditSpan; 2095 private EasyEditDeleteListener mOnDeleteListener; 2096 2097 @Override 2098 protected void createPopupWindow() { 2099 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2100 com.android.internal.R.attr.textSelectHandleWindowStyle); 2101 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2102 mPopupWindow.setClippingEnabled(true); 2103 } 2104 2105 @Override 2106 protected void initContentView() { 2107 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2108 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2109 mContentView = linearLayout; 2110 mContentView.setBackgroundResource( 2111 com.android.internal.R.drawable.text_edit_side_paste_window); 2112 2113 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2114 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2115 2116 LayoutParams wrapContent = new LayoutParams( 2117 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2118 2119 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2120 mDeleteTextView.setLayoutParams(wrapContent); 2121 mDeleteTextView.setText(com.android.internal.R.string.delete); 2122 mDeleteTextView.setOnClickListener(this); 2123 mContentView.addView(mDeleteTextView); 2124 } 2125 2126 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2127 mEasyEditSpan = easyEditSpan; 2128 } 2129 2130 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2131 mOnDeleteListener = listener; 2132 } 2133 2134 @Override 2135 public void onClick(View view) { 2136 if (view == mDeleteTextView 2137 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2138 && mOnDeleteListener != null) { 2139 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2140 } 2141 } 2142 2143 @Override 2144 public void hide() { 2145 if (mEasyEditSpan != null) { 2146 mEasyEditSpan.setDeleteEnabled(false); 2147 } 2148 mOnDeleteListener = null; 2149 super.hide(); 2150 } 2151 2152 @Override 2153 protected int getTextOffset() { 2154 // Place the pop-up at the end of the span 2155 Editable editable = (Editable) mTextView.getText(); 2156 return editable.getSpanEnd(mEasyEditSpan); 2157 } 2158 2159 @Override 2160 protected int getVerticalLocalPosition(int line) { 2161 return mTextView.getLayout().getLineBottom(line); 2162 } 2163 2164 @Override 2165 protected int clipVertically(int positionY) { 2166 // As we display the pop-up below the span, no vertical clipping is required. 2167 return positionY; 2168 } 2169 } 2170 2171 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2172 // 3 handles 2173 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2174 // 1 CursorAnchorInfoNotifier 2175 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2176 private TextViewPositionListener[] mPositionListeners = 2177 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2178 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2179 private boolean mPositionHasChanged = true; 2180 // Absolute position of the TextView with respect to its parent window 2181 private int mPositionX, mPositionY; 2182 private int mNumberOfListeners; 2183 private boolean mScrollHasChanged; 2184 final int[] mTempCoords = new int[2]; 2185 2186 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2187 if (mNumberOfListeners == 0) { 2188 updatePosition(); 2189 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2190 vto.addOnPreDrawListener(this); 2191 } 2192 2193 int emptySlotIndex = -1; 2194 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2195 TextViewPositionListener listener = mPositionListeners[i]; 2196 if (listener == positionListener) { 2197 return; 2198 } else if (emptySlotIndex < 0 && listener == null) { 2199 emptySlotIndex = i; 2200 } 2201 } 2202 2203 mPositionListeners[emptySlotIndex] = positionListener; 2204 mCanMove[emptySlotIndex] = canMove; 2205 mNumberOfListeners++; 2206 } 2207 2208 public void removeSubscriber(TextViewPositionListener positionListener) { 2209 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2210 if (mPositionListeners[i] == positionListener) { 2211 mPositionListeners[i] = null; 2212 mNumberOfListeners--; 2213 break; 2214 } 2215 } 2216 2217 if (mNumberOfListeners == 0) { 2218 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2219 vto.removeOnPreDrawListener(this); 2220 } 2221 } 2222 2223 public int getPositionX() { 2224 return mPositionX; 2225 } 2226 2227 public int getPositionY() { 2228 return mPositionY; 2229 } 2230 2231 @Override 2232 public boolean onPreDraw() { 2233 updatePosition(); 2234 2235 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2236 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2237 TextViewPositionListener positionListener = mPositionListeners[i]; 2238 if (positionListener != null) { 2239 positionListener.updatePosition(mPositionX, mPositionY, 2240 mPositionHasChanged, mScrollHasChanged); 2241 } 2242 } 2243 } 2244 2245 mScrollHasChanged = false; 2246 return true; 2247 } 2248 2249 private void updatePosition() { 2250 mTextView.getLocationInWindow(mTempCoords); 2251 2252 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2253 2254 mPositionX = mTempCoords[0]; 2255 mPositionY = mTempCoords[1]; 2256 } 2257 2258 public void onScrollChanged() { 2259 mScrollHasChanged = true; 2260 } 2261 } 2262 2263 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2264 protected PopupWindow mPopupWindow; 2265 protected ViewGroup mContentView; 2266 int mPositionX, mPositionY; 2267 2268 protected abstract void createPopupWindow(); 2269 protected abstract void initContentView(); 2270 protected abstract int getTextOffset(); 2271 protected abstract int getVerticalLocalPosition(int line); 2272 protected abstract int clipVertically(int positionY); 2273 2274 public PinnedPopupWindow() { 2275 createPopupWindow(); 2276 2277 mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 2278 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2279 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2280 2281 initContentView(); 2282 2283 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2284 ViewGroup.LayoutParams.WRAP_CONTENT); 2285 mContentView.setLayoutParams(wrapContent); 2286 2287 mPopupWindow.setContentView(mContentView); 2288 } 2289 2290 public void show() { 2291 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2292 2293 computeLocalPosition(); 2294 2295 final PositionListener positionListener = getPositionListener(); 2296 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2297 } 2298 2299 protected void measureContent() { 2300 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2301 mContentView.measure( 2302 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2303 View.MeasureSpec.AT_MOST), 2304 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2305 View.MeasureSpec.AT_MOST)); 2306 } 2307 2308 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2309 * positioned according to viewportToContentHorizontalOffset. 2310 * 2311 * This method assumes that mContentView has properly been measured from its content. */ 2312 private void computeLocalPosition() { 2313 measureContent(); 2314 final int width = mContentView.getMeasuredWidth(); 2315 final int offset = getTextOffset(); 2316 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2317 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2318 2319 final int line = mTextView.getLayout().getLineForOffset(offset); 2320 mPositionY = getVerticalLocalPosition(line); 2321 mPositionY += mTextView.viewportToContentVerticalOffset(); 2322 } 2323 2324 private void updatePosition(int parentPositionX, int parentPositionY) { 2325 int positionX = parentPositionX + mPositionX; 2326 int positionY = parentPositionY + mPositionY; 2327 2328 positionY = clipVertically(positionY); 2329 2330 // Horizontal clipping 2331 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2332 final int width = mContentView.getMeasuredWidth(); 2333 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2334 positionX = Math.max(0, positionX); 2335 2336 if (isShowing()) { 2337 mPopupWindow.update(positionX, positionY, -1, -1); 2338 } else { 2339 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2340 positionX, positionY); 2341 } 2342 } 2343 2344 public void hide() { 2345 mPopupWindow.dismiss(); 2346 getPositionListener().removeSubscriber(this); 2347 } 2348 2349 @Override 2350 public void updatePosition(int parentPositionX, int parentPositionY, 2351 boolean parentPositionChanged, boolean parentScrolled) { 2352 // Either parentPositionChanged or parentScrolled is true, check if still visible 2353 if (isShowing() && isOffsetVisible(getTextOffset())) { 2354 if (parentScrolled) computeLocalPosition(); 2355 updatePosition(parentPositionX, parentPositionY); 2356 } else { 2357 hide(); 2358 } 2359 } 2360 2361 public boolean isShowing() { 2362 return mPopupWindow.isShowing(); 2363 } 2364 } 2365 2366 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2367 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2368 private static final int ADD_TO_DICTIONARY = -1; 2369 private static final int DELETE_TEXT = -2; 2370 private SuggestionInfo[] mSuggestionInfos; 2371 private int mNumberOfSuggestions; 2372 private boolean mCursorWasVisibleBeforeSuggestions; 2373 private boolean mIsShowingUp = false; 2374 private SuggestionAdapter mSuggestionsAdapter; 2375 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2376 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2377 2378 private class CustomPopupWindow extends PopupWindow { 2379 public CustomPopupWindow(Context context, int defStyleAttr) { 2380 super(context, null, defStyleAttr); 2381 } 2382 2383 @Override 2384 public void dismiss() { 2385 super.dismiss(); 2386 2387 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2388 2389 // Safe cast since show() checks that mTextView.getText() is an Editable 2390 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2391 2392 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2393 if (hasInsertionController()) { 2394 getInsertionController().show(); 2395 } 2396 } 2397 } 2398 2399 public SuggestionsPopupWindow() { 2400 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2401 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2402 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2403 } 2404 2405 @Override 2406 protected void createPopupWindow() { 2407 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2408 com.android.internal.R.attr.textSuggestionsWindowStyle); 2409 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2410 mPopupWindow.setFocusable(true); 2411 mPopupWindow.setClippingEnabled(false); 2412 } 2413 2414 @Override 2415 protected void initContentView() { 2416 ListView listView = new ListView(mTextView.getContext()); 2417 mSuggestionsAdapter = new SuggestionAdapter(); 2418 listView.setAdapter(mSuggestionsAdapter); 2419 listView.setOnItemClickListener(this); 2420 mContentView = listView; 2421 2422 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2423 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2424 for (int i = 0; i < mSuggestionInfos.length; i++) { 2425 mSuggestionInfos[i] = new SuggestionInfo(); 2426 } 2427 } 2428 2429 public boolean isShowingUp() { 2430 return mIsShowingUp; 2431 } 2432 2433 public void onParentLostFocus() { 2434 mIsShowingUp = false; 2435 } 2436 2437 private class SuggestionInfo { 2438 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2439 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2440 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2441 SpannableStringBuilder text = new SpannableStringBuilder(); 2442 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2443 android.R.style.TextAppearance_SuggestionHighlight); 2444 } 2445 2446 private class SuggestionAdapter extends BaseAdapter { 2447 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2448 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2449 2450 @Override 2451 public int getCount() { 2452 return mNumberOfSuggestions; 2453 } 2454 2455 @Override 2456 public Object getItem(int position) { 2457 return mSuggestionInfos[position]; 2458 } 2459 2460 @Override 2461 public long getItemId(int position) { 2462 return position; 2463 } 2464 2465 @Override 2466 public View getView(int position, View convertView, ViewGroup parent) { 2467 TextView textView = (TextView) convertView; 2468 2469 if (textView == null) { 2470 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2471 parent, false); 2472 } 2473 2474 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2475 textView.setText(suggestionInfo.text); 2476 2477 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2478 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2479 textView.setBackgroundColor(Color.TRANSPARENT); 2480 } else { 2481 textView.setBackgroundColor(Color.WHITE); 2482 } 2483 2484 return textView; 2485 } 2486 } 2487 2488 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2489 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2490 final int flag1 = span1.getFlags(); 2491 final int flag2 = span2.getFlags(); 2492 if (flag1 != flag2) { 2493 // The order here should match what is used in updateDrawState 2494 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2495 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2496 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2497 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2498 if (easy1 && !misspelled1) return -1; 2499 if (easy2 && !misspelled2) return 1; 2500 if (misspelled1) return -1; 2501 if (misspelled2) return 1; 2502 } 2503 2504 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2505 } 2506 } 2507 2508 /** 2509 * Returns the suggestion spans that cover the current cursor position. The suggestion 2510 * spans are sorted according to the length of text that they are attached to. 2511 */ 2512 private SuggestionSpan[] getSuggestionSpans() { 2513 int pos = mTextView.getSelectionStart(); 2514 Spannable spannable = (Spannable) mTextView.getText(); 2515 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2516 2517 mSpansLengths.clear(); 2518 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2519 int start = spannable.getSpanStart(suggestionSpan); 2520 int end = spannable.getSpanEnd(suggestionSpan); 2521 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2522 } 2523 2524 // The suggestions are sorted according to their types (easy correction first, then 2525 // misspelled) and to the length of the text that they cover (shorter first). 2526 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2527 return suggestionSpans; 2528 } 2529 2530 @Override 2531 public void show() { 2532 if (!(mTextView.getText() instanceof Editable)) return; 2533 2534 if (updateSuggestions()) { 2535 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2536 mTextView.setCursorVisible(false); 2537 mIsShowingUp = true; 2538 super.show(); 2539 } 2540 } 2541 2542 @Override 2543 protected void measureContent() { 2544 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2545 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2546 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2547 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2548 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2549 2550 int width = 0; 2551 View view = null; 2552 for (int i = 0; i < mNumberOfSuggestions; i++) { 2553 view = mSuggestionsAdapter.getView(i, view, mContentView); 2554 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2555 view.measure(horizontalMeasure, verticalMeasure); 2556 width = Math.max(width, view.getMeasuredWidth()); 2557 } 2558 2559 // Enforce the width based on actual text widths 2560 mContentView.measure( 2561 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2562 verticalMeasure); 2563 2564 Drawable popupBackground = mPopupWindow.getBackground(); 2565 if (popupBackground != null) { 2566 if (mTempRect == null) mTempRect = new Rect(); 2567 popupBackground.getPadding(mTempRect); 2568 width += mTempRect.left + mTempRect.right; 2569 } 2570 mPopupWindow.setWidth(width); 2571 } 2572 2573 @Override 2574 protected int getTextOffset() { 2575 return mTextView.getSelectionStart(); 2576 } 2577 2578 @Override 2579 protected int getVerticalLocalPosition(int line) { 2580 return mTextView.getLayout().getLineBottom(line); 2581 } 2582 2583 @Override 2584 protected int clipVertically(int positionY) { 2585 final int height = mContentView.getMeasuredHeight(); 2586 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2587 return Math.min(positionY, displayMetrics.heightPixels - height); 2588 } 2589 2590 @Override 2591 public void hide() { 2592 super.hide(); 2593 } 2594 2595 private boolean updateSuggestions() { 2596 Spannable spannable = (Spannable) mTextView.getText(); 2597 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2598 2599 final int nbSpans = suggestionSpans.length; 2600 // Suggestions are shown after a delay: the underlying spans may have been removed 2601 if (nbSpans == 0) return false; 2602 2603 mNumberOfSuggestions = 0; 2604 int spanUnionStart = mTextView.getText().length(); 2605 int spanUnionEnd = 0; 2606 2607 SuggestionSpan misspelledSpan = null; 2608 int underlineColor = 0; 2609 2610 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2611 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2612 final int spanStart = spannable.getSpanStart(suggestionSpan); 2613 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2614 spanUnionStart = Math.min(spanStart, spanUnionStart); 2615 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2616 2617 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2618 misspelledSpan = suggestionSpan; 2619 } 2620 2621 // The first span dictates the background color of the highlighted text 2622 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2623 2624 String[] suggestions = suggestionSpan.getSuggestions(); 2625 int nbSuggestions = suggestions.length; 2626 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2627 String suggestion = suggestions[suggestionIndex]; 2628 2629 boolean suggestionIsDuplicate = false; 2630 for (int i = 0; i < mNumberOfSuggestions; i++) { 2631 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2632 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2633 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2634 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2635 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2636 suggestionIsDuplicate = true; 2637 break; 2638 } 2639 } 2640 } 2641 2642 if (!suggestionIsDuplicate) { 2643 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2644 suggestionInfo.suggestionSpan = suggestionSpan; 2645 suggestionInfo.suggestionIndex = suggestionIndex; 2646 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2647 2648 mNumberOfSuggestions++; 2649 2650 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2651 // Also end outer for loop 2652 spanIndex = nbSpans; 2653 break; 2654 } 2655 } 2656 } 2657 } 2658 2659 for (int i = 0; i < mNumberOfSuggestions; i++) { 2660 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2661 } 2662 2663 // Add "Add to dictionary" item if there is a span with the misspelled flag 2664 if (misspelledSpan != null) { 2665 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2666 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2667 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2668 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2669 suggestionInfo.suggestionSpan = misspelledSpan; 2670 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2671 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2672 getContext().getString(com.android.internal.R.string.addToDictionary)); 2673 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2674 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2675 2676 mNumberOfSuggestions++; 2677 } 2678 } 2679 2680 // Delete item 2681 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2682 suggestionInfo.suggestionSpan = null; 2683 suggestionInfo.suggestionIndex = DELETE_TEXT; 2684 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2685 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2686 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2687 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2688 mNumberOfSuggestions++; 2689 2690 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2691 if (underlineColor == 0) { 2692 // Fallback on the default highlight color when the first span does not provide one 2693 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2694 } else { 2695 final float BACKGROUND_TRANSPARENCY = 0.4f; 2696 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2697 mSuggestionRangeSpan.setBackgroundColor( 2698 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2699 } 2700 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2701 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2702 2703 mSuggestionsAdapter.notifyDataSetChanged(); 2704 return true; 2705 } 2706 2707 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2708 int unionEnd) { 2709 final Spannable text = (Spannable) mTextView.getText(); 2710 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2711 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2712 2713 // Adjust the start/end of the suggestion span 2714 suggestionInfo.suggestionStart = spanStart - unionStart; 2715 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2716 + suggestionInfo.text.length(); 2717 2718 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2719 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2720 2721 // Add the text before and after the span. 2722 final String textAsString = text.toString(); 2723 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2724 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2725 } 2726 2727 @Override 2728 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2729 Editable editable = (Editable) mTextView.getText(); 2730 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2731 2732 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2733 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2734 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2735 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2736 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2737 if (spanUnionEnd < editable.length() && 2738 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2739 (spanUnionStart == 0 || 2740 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2741 spanUnionEnd = spanUnionEnd + 1; 2742 } 2743 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2744 } 2745 hide(); 2746 return; 2747 } 2748 2749 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2750 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2751 if (spanStart < 0 || spanEnd <= spanStart) { 2752 // Span has been removed 2753 hide(); 2754 return; 2755 } 2756 2757 final String originalText = editable.toString().substring(spanStart, spanEnd); 2758 2759 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2760 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2761 intent.putExtra("word", originalText); 2762 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2763 // Put a listener to replace the original text with a word which the user 2764 // modified in a user dictionary dialog. 2765 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2766 mTextView.getContext().startActivity(intent); 2767 // There is no way to know if the word was indeed added. Re-check. 2768 // TODO The ExtractEditText should remove the span in the original text instead 2769 editable.removeSpan(suggestionInfo.suggestionSpan); 2770 Selection.setSelection(editable, spanEnd); 2771 updateSpellCheckSpans(spanStart, spanEnd, false); 2772 } else { 2773 // SuggestionSpans are removed by replace: save them before 2774 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2775 SuggestionSpan.class); 2776 final int length = suggestionSpans.length; 2777 int[] suggestionSpansStarts = new int[length]; 2778 int[] suggestionSpansEnds = new int[length]; 2779 int[] suggestionSpansFlags = new int[length]; 2780 for (int i = 0; i < length; i++) { 2781 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2782 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2783 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2784 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2785 2786 // Remove potential misspelled flags 2787 int suggestionSpanFlags = suggestionSpan.getFlags(); 2788 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2789 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2790 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2791 suggestionSpan.setFlags(suggestionSpanFlags); 2792 } 2793 } 2794 2795 final int suggestionStart = suggestionInfo.suggestionStart; 2796 final int suggestionEnd = suggestionInfo.suggestionEnd; 2797 final String suggestion = suggestionInfo.text.subSequence( 2798 suggestionStart, suggestionEnd).toString(); 2799 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2800 2801 // Notify source IME of the suggestion pick. Do this before 2802 // swaping texts. 2803 suggestionInfo.suggestionSpan.notifySelection( 2804 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 2805 2806 // Swap text content between actual text and Suggestion span 2807 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 2808 suggestions[suggestionInfo.suggestionIndex] = originalText; 2809 2810 // Restore previous SuggestionSpans 2811 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 2812 for (int i = 0; i < length; i++) { 2813 // Only spans that include the modified region make sense after replacement 2814 // Spans partially included in the replaced region are removed, there is no 2815 // way to assign them a valid range after replacement 2816 if (suggestionSpansStarts[i] <= spanStart && 2817 suggestionSpansEnds[i] >= spanEnd) { 2818 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2819 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 2820 } 2821 } 2822 2823 // Move cursor at the end of the replaced word 2824 final int newCursorPosition = spanEnd + lengthDifference; 2825 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2826 } 2827 2828 hide(); 2829 } 2830 } 2831 2832 /** 2833 * An ActionMode Callback class that is used to provide actions while in text selection mode. 2834 * 2835 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 2836 * on which of these this TextView supports. 2837 */ 2838 private class SelectionActionModeCallback implements ActionMode.Callback { 2839 2840 @Override 2841 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 2842 final boolean legacy = mTextView.getContext().getApplicationInfo().targetSdkVersion < 2843 Build.VERSION_CODES.LOLLIPOP; 2844 final Context context = !legacy && menu instanceof MenuBuilder ? 2845 ((MenuBuilder) menu).getContext() : 2846 mTextView.getContext(); 2847 final TypedArray styledAttributes = context.obtainStyledAttributes( 2848 com.android.internal.R.styleable.SelectionModeDrawables); 2849 2850 mode.setTitle(mTextView.getContext().getString( 2851 com.android.internal.R.string.textSelectionCABTitle)); 2852 mode.setSubtitle(null); 2853 mode.setTitleOptionalHint(true); 2854 2855 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 2856 setIcon(styledAttributes.getResourceId( 2857 R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0)). 2858 setAlphabeticShortcut('a'). 2859 setShowAsAction( 2860 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2861 2862 if (mTextView.canCut()) { 2863 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 2864 setIcon(styledAttributes.getResourceId( 2865 R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)). 2866 setAlphabeticShortcut('x'). 2867 setShowAsAction( 2868 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2869 } 2870 2871 if (mTextView.canCopy()) { 2872 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 2873 setIcon(styledAttributes.getResourceId( 2874 R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)). 2875 setAlphabeticShortcut('c'). 2876 setShowAsAction( 2877 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2878 } 2879 2880 if (mTextView.canPaste()) { 2881 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 2882 setIcon(styledAttributes.getResourceId( 2883 R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)). 2884 setAlphabeticShortcut('v'). 2885 setShowAsAction( 2886 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2887 } 2888 2889 styledAttributes.recycle(); 2890 2891 if (mCustomSelectionActionModeCallback != null) { 2892 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 2893 // The custom mode can choose to cancel the action mode 2894 return false; 2895 } 2896 } 2897 2898 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 2899 getSelectionController().show(); 2900 mTextView.setHasTransientState(true); 2901 return true; 2902 } else { 2903 return false; 2904 } 2905 } 2906 2907 @Override 2908 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 2909 if (mCustomSelectionActionModeCallback != null) { 2910 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 2911 } 2912 return true; 2913 } 2914 2915 @Override 2916 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 2917 if (mCustomSelectionActionModeCallback != null && 2918 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 2919 return true; 2920 } 2921 return mTextView.onTextContextMenuItem(item.getItemId()); 2922 } 2923 2924 @Override 2925 public void onDestroyActionMode(ActionMode mode) { 2926 if (mCustomSelectionActionModeCallback != null) { 2927 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 2928 } 2929 2930 /* 2931 * If we're ending this mode because we're detaching from a window, 2932 * we still have selection state to preserve. Don't clear it, we'll 2933 * bring back the selection mode when (if) we get reattached. 2934 */ 2935 if (!mPreserveDetachedSelection) { 2936 Selection.setSelection((Spannable) mTextView.getText(), 2937 mTextView.getSelectionEnd()); 2938 mTextView.setHasTransientState(false); 2939 } 2940 2941 if (mSelectionModifierCursorController != null) { 2942 mSelectionModifierCursorController.hide(); 2943 } 2944 2945 mSelectionActionMode = null; 2946 } 2947 } 2948 2949 private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener { 2950 private static final int POPUP_TEXT_LAYOUT = 2951 com.android.internal.R.layout.text_edit_action_popup_text; 2952 private TextView mPasteTextView; 2953 private TextView mReplaceTextView; 2954 2955 @Override 2956 protected void createPopupWindow() { 2957 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2958 com.android.internal.R.attr.textSelectHandleWindowStyle); 2959 mPopupWindow.setClippingEnabled(true); 2960 } 2961 2962 @Override 2963 protected void initContentView() { 2964 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2965 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2966 mContentView = linearLayout; 2967 mContentView.setBackgroundResource( 2968 com.android.internal.R.drawable.text_edit_paste_window); 2969 2970 LayoutInflater inflater = (LayoutInflater) mTextView.getContext(). 2971 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2972 2973 LayoutParams wrapContent = new LayoutParams( 2974 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2975 2976 mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2977 mPasteTextView.setLayoutParams(wrapContent); 2978 mContentView.addView(mPasteTextView); 2979 mPasteTextView.setText(com.android.internal.R.string.paste); 2980 mPasteTextView.setOnClickListener(this); 2981 2982 mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2983 mReplaceTextView.setLayoutParams(wrapContent); 2984 mContentView.addView(mReplaceTextView); 2985 mReplaceTextView.setText(com.android.internal.R.string.replace); 2986 mReplaceTextView.setOnClickListener(this); 2987 } 2988 2989 @Override 2990 public void show() { 2991 boolean canPaste = mTextView.canPaste(); 2992 boolean canSuggest = mTextView.isSuggestionsEnabled() && isCursorInsideSuggestionSpan(); 2993 mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE); 2994 mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE); 2995 2996 if (!canPaste && !canSuggest) return; 2997 2998 super.show(); 2999 } 3000 3001 @Override 3002 public void onClick(View view) { 3003 if (view == mPasteTextView && mTextView.canPaste()) { 3004 mTextView.onTextContextMenuItem(TextView.ID_PASTE); 3005 hide(); 3006 } else if (view == mReplaceTextView) { 3007 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3008 stopSelectionActionMode(); 3009 Selection.setSelection((Spannable) mTextView.getText(), middle); 3010 showSuggestions(); 3011 } 3012 } 3013 3014 @Override 3015 protected int getTextOffset() { 3016 return (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3017 } 3018 3019 @Override 3020 protected int getVerticalLocalPosition(int line) { 3021 return mTextView.getLayout().getLineTop(line) - mContentView.getMeasuredHeight(); 3022 } 3023 3024 @Override 3025 protected int clipVertically(int positionY) { 3026 if (positionY < 0) { 3027 final int offset = getTextOffset(); 3028 final Layout layout = mTextView.getLayout(); 3029 final int line = layout.getLineForOffset(offset); 3030 positionY += layout.getLineBottom(line) - layout.getLineTop(line); 3031 positionY += mContentView.getMeasuredHeight(); 3032 3033 // Assumes insertion and selection handles share the same height 3034 final Drawable handle = mTextView.getContext().getDrawable( 3035 mTextView.mTextSelectHandleRes); 3036 positionY += handle.getIntrinsicHeight(); 3037 } 3038 3039 return positionY; 3040 } 3041 } 3042 3043 /** 3044 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3045 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3046 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3047 */ 3048 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3049 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3050 final int[] mTmpIntOffset = new int[2]; 3051 final Matrix mViewToScreenMatrix = new Matrix(); 3052 3053 @Override 3054 public void updatePosition(int parentPositionX, int parentPositionY, 3055 boolean parentPositionChanged, boolean parentScrolled) { 3056 final InputMethodState ims = mInputMethodState; 3057 if (ims == null || ims.mBatchEditNesting > 0) { 3058 return; 3059 } 3060 final InputMethodManager imm = InputMethodManager.peekInstance(); 3061 if (null == imm) { 3062 return; 3063 } 3064 if (!imm.isActive(mTextView)) { 3065 return; 3066 } 3067 // Skip if the IME has not requested the cursor/anchor position. 3068 if (!imm.isCursorAnchorInfoEnabled()) { 3069 return; 3070 } 3071 Layout layout = mTextView.getLayout(); 3072 if (layout == null) { 3073 return; 3074 } 3075 3076 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3077 builder.reset(); 3078 3079 final int selectionStart = mTextView.getSelectionStart(); 3080 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3081 3082 // Construct transformation matrix from view local coordinates to screen coordinates. 3083 mViewToScreenMatrix.set(mTextView.getMatrix()); 3084 mTextView.getLocationOnScreen(mTmpIntOffset); 3085 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3086 builder.setMatrix(mViewToScreenMatrix); 3087 3088 final float viewportToContentHorizontalOffset = 3089 mTextView.viewportToContentHorizontalOffset(); 3090 final float viewportToContentVerticalOffset = 3091 mTextView.viewportToContentVerticalOffset(); 3092 3093 final CharSequence text = mTextView.getText(); 3094 if (text instanceof Spannable) { 3095 final Spannable sp = (Spannable) text; 3096 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3097 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3098 if (composingTextEnd < composingTextStart) { 3099 final int temp = composingTextEnd; 3100 composingTextEnd = composingTextStart; 3101 composingTextStart = temp; 3102 } 3103 final boolean hasComposingText = 3104 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3105 if (hasComposingText) { 3106 final CharSequence composingText = text.subSequence(composingTextStart, 3107 composingTextEnd); 3108 builder.setComposingText(composingTextStart, composingText); 3109 3110 final int minLine = layout.getLineForOffset(composingTextStart); 3111 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3112 for (int line = minLine; line <= maxLine; ++line) { 3113 final int lineStart = layout.getLineStart(line); 3114 final int lineEnd = layout.getLineEnd(line); 3115 final int offsetStart = Math.max(lineStart, composingTextStart); 3116 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3117 final boolean ltrLine = 3118 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3119 final float[] widths = new float[offsetEnd - offsetStart]; 3120 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3121 final float top = layout.getLineTop(line); 3122 final float bottom = layout.getLineBottom(line); 3123 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3124 final float charWidth = widths[offset - offsetStart]; 3125 final boolean isRtl = layout.isRtlCharAt(offset); 3126 final float primary = layout.getPrimaryHorizontal(offset); 3127 final float secondary = layout.getSecondaryHorizontal(offset); 3128 // TODO: This doesn't work perfectly for text with custom styles and 3129 // TAB chars. 3130 final float left; 3131 final float right; 3132 if (ltrLine) { 3133 if (isRtl) { 3134 left = secondary - charWidth; 3135 right = secondary; 3136 } else { 3137 left = primary; 3138 right = primary + charWidth; 3139 } 3140 } else { 3141 if (!isRtl) { 3142 left = secondary; 3143 right = secondary + charWidth; 3144 } else { 3145 left = primary - charWidth; 3146 right = primary; 3147 } 3148 } 3149 // TODO: Check top-right and bottom-left as well. 3150 final float localLeft = left + viewportToContentHorizontalOffset; 3151 final float localRight = right + viewportToContentHorizontalOffset; 3152 final float localTop = top + viewportToContentVerticalOffset; 3153 final float localBottom = bottom + viewportToContentVerticalOffset; 3154 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3155 final boolean isBottomRightVisible = 3156 isPositionVisible(localRight, localBottom); 3157 int characterBoundsFlags = 0; 3158 if (isTopLeftVisible || isBottomRightVisible) { 3159 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3160 } 3161 if (!isTopLeftVisible || !isTopLeftVisible) { 3162 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3163 } 3164 if (isRtl) { 3165 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3166 } 3167 // Here offset is the index in Java chars. 3168 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3169 localBottom, characterBoundsFlags); 3170 } 3171 } 3172 } 3173 } 3174 3175 // Treat selectionStart as the insertion point. 3176 if (0 <= selectionStart) { 3177 final int offset = selectionStart; 3178 final int line = layout.getLineForOffset(offset); 3179 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3180 + viewportToContentHorizontalOffset; 3181 final float insertionMarkerTop = layout.getLineTop(line) 3182 + viewportToContentVerticalOffset; 3183 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3184 + viewportToContentVerticalOffset; 3185 final float insertionMarkerBottom = layout.getLineBottom(line) 3186 + viewportToContentVerticalOffset; 3187 final boolean isTopVisible = 3188 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3189 final boolean isBottomVisible = 3190 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3191 int insertionMarkerFlags = 0; 3192 if (isTopVisible || isBottomVisible) { 3193 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3194 } 3195 if (!isTopVisible || !isBottomVisible) { 3196 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3197 } 3198 if (layout.isRtlCharAt(offset)) { 3199 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3200 } 3201 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3202 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3203 } 3204 3205 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3206 } 3207 } 3208 3209 private abstract class HandleView extends View implements TextViewPositionListener { 3210 protected Drawable mDrawable; 3211 protected Drawable mDrawableLtr; 3212 protected Drawable mDrawableRtl; 3213 private final PopupWindow mContainer; 3214 // Position with respect to the parent TextView 3215 private int mPositionX, mPositionY; 3216 private boolean mIsDragging; 3217 // Offset from touch position to mPosition 3218 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3219 protected int mHotspotX; 3220 protected int mHorizontalGravity; 3221 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3222 private float mTouchOffsetY; 3223 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3224 private float mIdealVerticalOffset; 3225 // Parent's (TextView) previous position in window 3226 private int mLastParentX, mLastParentY; 3227 // Transient action popup window for Paste and Replace actions 3228 protected ActionPopupWindow mActionPopupWindow; 3229 // Previous text character offset 3230 private int mPreviousOffset = -1; 3231 // Previous text character offset 3232 private boolean mPositionHasChanged = true; 3233 // Used to delay the appearance of the action popup window 3234 private Runnable mActionPopupShower; 3235 // Minimum touch target size for handles 3236 private int mMinSize; 3237 3238 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3239 super(mTextView.getContext()); 3240 mContainer = new PopupWindow(mTextView.getContext(), null, 3241 com.android.internal.R.attr.textSelectHandleWindowStyle); 3242 mContainer.setSplitTouchEnabled(true); 3243 mContainer.setClippingEnabled(false); 3244 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3245 mContainer.setContentView(this); 3246 3247 mDrawableLtr = drawableLtr; 3248 mDrawableRtl = drawableRtl; 3249 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3250 com.android.internal.R.dimen.text_handle_min_size); 3251 3252 updateDrawable(); 3253 3254 final int handleHeight = getPreferredHeight(); 3255 mTouchOffsetY = -0.3f * handleHeight; 3256 mIdealVerticalOffset = 0.7f * handleHeight; 3257 } 3258 3259 protected void updateDrawable() { 3260 final int offset = getCurrentCursorOffset(); 3261 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3262 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3263 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3264 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3265 } 3266 3267 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3268 protected abstract int getHorizontalGravity(boolean isRtlRun); 3269 3270 // Touch-up filter: number of previous positions remembered 3271 private static final int HISTORY_SIZE = 5; 3272 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3273 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3274 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3275 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3276 private int mPreviousOffsetIndex = 0; 3277 private int mNumberPreviousOffsets = 0; 3278 3279 private void startTouchUpFilter(int offset) { 3280 mNumberPreviousOffsets = 0; 3281 addPositionToTouchUpFilter(offset); 3282 } 3283 3284 private void addPositionToTouchUpFilter(int offset) { 3285 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3286 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3287 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3288 mNumberPreviousOffsets++; 3289 } 3290 3291 private void filterOnTouchUp() { 3292 final long now = SystemClock.uptimeMillis(); 3293 int i = 0; 3294 int index = mPreviousOffsetIndex; 3295 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3296 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3297 i++; 3298 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3299 } 3300 3301 if (i > 0 && i < iMax && 3302 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3303 positionAtCursorOffset(mPreviousOffsets[index], false); 3304 } 3305 } 3306 3307 public boolean offsetHasBeenChanged() { 3308 return mNumberPreviousOffsets > 1; 3309 } 3310 3311 @Override 3312 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3313 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3314 } 3315 3316 private int getPreferredWidth() { 3317 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3318 } 3319 3320 private int getPreferredHeight() { 3321 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3322 } 3323 3324 public void show() { 3325 if (isShowing()) return; 3326 3327 getPositionListener().addSubscriber(this, true /* local position may change */); 3328 3329 // Make sure the offset is always considered new, even when focusing at same position 3330 mPreviousOffset = -1; 3331 positionAtCursorOffset(getCurrentCursorOffset(), false); 3332 3333 hideActionPopupWindow(); 3334 } 3335 3336 protected void dismiss() { 3337 mIsDragging = false; 3338 mContainer.dismiss(); 3339 onDetached(); 3340 } 3341 3342 public void hide() { 3343 dismiss(); 3344 3345 getPositionListener().removeSubscriber(this); 3346 } 3347 3348 void showActionPopupWindow(int delay) { 3349 if (mActionPopupWindow == null) { 3350 mActionPopupWindow = new ActionPopupWindow(); 3351 } 3352 if (mActionPopupShower == null) { 3353 mActionPopupShower = new Runnable() { 3354 public void run() { 3355 mActionPopupWindow.show(); 3356 } 3357 }; 3358 } else { 3359 mTextView.removeCallbacks(mActionPopupShower); 3360 } 3361 mTextView.postDelayed(mActionPopupShower, delay); 3362 } 3363 3364 protected void hideActionPopupWindow() { 3365 if (mActionPopupShower != null) { 3366 mTextView.removeCallbacks(mActionPopupShower); 3367 } 3368 if (mActionPopupWindow != null) { 3369 mActionPopupWindow.hide(); 3370 } 3371 } 3372 3373 public boolean isShowing() { 3374 return mContainer.isShowing(); 3375 } 3376 3377 private boolean isVisible() { 3378 // Always show a dragging handle. 3379 if (mIsDragging) { 3380 return true; 3381 } 3382 3383 if (mTextView.isInBatchEditMode()) { 3384 return false; 3385 } 3386 3387 return isPositionVisible(mPositionX + mHotspotX, mPositionY); 3388 } 3389 3390 public abstract int getCurrentCursorOffset(); 3391 3392 protected abstract void updateSelection(int offset); 3393 3394 public abstract void updatePosition(float x, float y); 3395 3396 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3397 // A HandleView relies on the layout, which may be nulled by external methods 3398 Layout layout = mTextView.getLayout(); 3399 if (layout == null) { 3400 // Will update controllers' state, hiding them and stopping selection mode if needed 3401 prepareCursorControllers(); 3402 return; 3403 } 3404 3405 boolean offsetChanged = offset != mPreviousOffset; 3406 if (offsetChanged || parentScrolled) { 3407 if (offsetChanged) { 3408 updateSelection(offset); 3409 addPositionToTouchUpFilter(offset); 3410 } 3411 final int line = layout.getLineForOffset(offset); 3412 3413 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3414 getHorizontalOffset() + getCursorOffset()); 3415 mPositionY = layout.getLineBottom(line); 3416 3417 // Take TextView's padding and scroll into account. 3418 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3419 mPositionY += mTextView.viewportToContentVerticalOffset(); 3420 3421 mPreviousOffset = offset; 3422 mPositionHasChanged = true; 3423 } 3424 } 3425 3426 public void updatePosition(int parentPositionX, int parentPositionY, 3427 boolean parentPositionChanged, boolean parentScrolled) { 3428 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3429 if (parentPositionChanged || mPositionHasChanged) { 3430 if (mIsDragging) { 3431 // Update touchToWindow offset in case of parent scrolling while dragging 3432 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3433 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3434 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3435 mLastParentX = parentPositionX; 3436 mLastParentY = parentPositionY; 3437 } 3438 3439 onHandleMoved(); 3440 } 3441 3442 if (isVisible()) { 3443 final int positionX = parentPositionX + mPositionX; 3444 final int positionY = parentPositionY + mPositionY; 3445 if (isShowing()) { 3446 mContainer.update(positionX, positionY, -1, -1); 3447 } else { 3448 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3449 positionX, positionY); 3450 } 3451 } else { 3452 if (isShowing()) { 3453 dismiss(); 3454 } 3455 } 3456 3457 mPositionHasChanged = false; 3458 } 3459 } 3460 3461 @Override 3462 protected void onDraw(Canvas c) { 3463 final int drawWidth = mDrawable.getIntrinsicWidth(); 3464 final int left = getHorizontalOffset(); 3465 3466 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3467 mDrawable.draw(c); 3468 } 3469 3470 private int getHorizontalOffset() { 3471 final int width = getPreferredWidth(); 3472 final int drawWidth = mDrawable.getIntrinsicWidth(); 3473 final int left; 3474 switch (mHorizontalGravity) { 3475 case Gravity.LEFT: 3476 left = 0; 3477 break; 3478 default: 3479 case Gravity.CENTER: 3480 left = (width - drawWidth) / 2; 3481 break; 3482 case Gravity.RIGHT: 3483 left = width - drawWidth; 3484 break; 3485 } 3486 return left; 3487 } 3488 3489 protected int getCursorOffset() { 3490 return 0; 3491 } 3492 3493 @Override 3494 public boolean onTouchEvent(MotionEvent ev) { 3495 switch (ev.getActionMasked()) { 3496 case MotionEvent.ACTION_DOWN: { 3497 startTouchUpFilter(getCurrentCursorOffset()); 3498 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3499 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3500 3501 final PositionListener positionListener = getPositionListener(); 3502 mLastParentX = positionListener.getPositionX(); 3503 mLastParentY = positionListener.getPositionY(); 3504 mIsDragging = true; 3505 break; 3506 } 3507 3508 case MotionEvent.ACTION_MOVE: { 3509 final float rawX = ev.getRawX(); 3510 final float rawY = ev.getRawY(); 3511 3512 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3513 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3514 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3515 float newVerticalOffset; 3516 if (previousVerticalOffset < mIdealVerticalOffset) { 3517 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3518 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3519 } else { 3520 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3521 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3522 } 3523 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3524 3525 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3526 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3527 3528 updatePosition(newPosX, newPosY); 3529 break; 3530 } 3531 3532 case MotionEvent.ACTION_UP: 3533 filterOnTouchUp(); 3534 mIsDragging = false; 3535 break; 3536 3537 case MotionEvent.ACTION_CANCEL: 3538 mIsDragging = false; 3539 break; 3540 } 3541 return true; 3542 } 3543 3544 public boolean isDragging() { 3545 return mIsDragging; 3546 } 3547 3548 void onHandleMoved() { 3549 hideActionPopupWindow(); 3550 } 3551 3552 public void onDetached() { 3553 hideActionPopupWindow(); 3554 } 3555 } 3556 3557 private class InsertionHandleView extends HandleView { 3558 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3559 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3560 3561 // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow 3562 private float mDownPositionX, mDownPositionY; 3563 private Runnable mHider; 3564 3565 public InsertionHandleView(Drawable drawable) { 3566 super(drawable, drawable); 3567 } 3568 3569 @Override 3570 public void show() { 3571 super.show(); 3572 3573 final long durationSinceCutOrCopy = 3574 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3575 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3576 showActionPopupWindow(0); 3577 } 3578 3579 hideAfterDelay(); 3580 } 3581 3582 public void showWithActionPopup() { 3583 show(); 3584 showActionPopupWindow(0); 3585 } 3586 3587 private void hideAfterDelay() { 3588 if (mHider == null) { 3589 mHider = new Runnable() { 3590 public void run() { 3591 hide(); 3592 } 3593 }; 3594 } else { 3595 removeHiderCallback(); 3596 } 3597 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3598 } 3599 3600 private void removeHiderCallback() { 3601 if (mHider != null) { 3602 mTextView.removeCallbacks(mHider); 3603 } 3604 } 3605 3606 @Override 3607 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3608 return drawable.getIntrinsicWidth() / 2; 3609 } 3610 3611 @Override 3612 protected int getHorizontalGravity(boolean isRtlRun) { 3613 return Gravity.CENTER_HORIZONTAL; 3614 } 3615 3616 @Override 3617 protected int getCursorOffset() { 3618 int offset = super.getCursorOffset(); 3619 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3620 if (cursor != null) { 3621 cursor.getPadding(mTempRect); 3622 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3623 } 3624 return offset; 3625 } 3626 3627 @Override 3628 public boolean onTouchEvent(MotionEvent ev) { 3629 final boolean result = super.onTouchEvent(ev); 3630 3631 switch (ev.getActionMasked()) { 3632 case MotionEvent.ACTION_DOWN: 3633 mDownPositionX = ev.getRawX(); 3634 mDownPositionY = ev.getRawY(); 3635 break; 3636 3637 case MotionEvent.ACTION_UP: 3638 if (!offsetHasBeenChanged()) { 3639 final float deltaX = mDownPositionX - ev.getRawX(); 3640 final float deltaY = mDownPositionY - ev.getRawY(); 3641 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3642 3643 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3644 mTextView.getContext()); 3645 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3646 3647 if (distanceSquared < touchSlop * touchSlop) { 3648 if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) { 3649 // Tapping on the handle dismisses the displayed action popup 3650 mActionPopupWindow.hide(); 3651 } else { 3652 showWithActionPopup(); 3653 } 3654 } 3655 } 3656 hideAfterDelay(); 3657 break; 3658 3659 case MotionEvent.ACTION_CANCEL: 3660 hideAfterDelay(); 3661 break; 3662 3663 default: 3664 break; 3665 } 3666 3667 return result; 3668 } 3669 3670 @Override 3671 public int getCurrentCursorOffset() { 3672 return mTextView.getSelectionStart(); 3673 } 3674 3675 @Override 3676 public void updateSelection(int offset) { 3677 Selection.setSelection((Spannable) mTextView.getText(), offset); 3678 } 3679 3680 @Override 3681 public void updatePosition(float x, float y) { 3682 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3683 } 3684 3685 @Override 3686 void onHandleMoved() { 3687 super.onHandleMoved(); 3688 removeHiderCallback(); 3689 } 3690 3691 @Override 3692 public void onDetached() { 3693 super.onDetached(); 3694 removeHiderCallback(); 3695 } 3696 } 3697 3698 private class SelectionStartHandleView extends HandleView { 3699 3700 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3701 super(drawableLtr, drawableRtl); 3702 } 3703 3704 @Override 3705 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3706 if (isRtlRun) { 3707 return drawable.getIntrinsicWidth() / 4; 3708 } else { 3709 return (drawable.getIntrinsicWidth() * 3) / 4; 3710 } 3711 } 3712 3713 @Override 3714 protected int getHorizontalGravity(boolean isRtlRun) { 3715 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 3716 } 3717 3718 @Override 3719 public int getCurrentCursorOffset() { 3720 return mTextView.getSelectionStart(); 3721 } 3722 3723 @Override 3724 public void updateSelection(int offset) { 3725 Selection.setSelection((Spannable) mTextView.getText(), offset, 3726 mTextView.getSelectionEnd()); 3727 updateDrawable(); 3728 } 3729 3730 @Override 3731 public void updatePosition(float x, float y) { 3732 int offset = mTextView.getOffsetForPosition(x, y); 3733 3734 // Handles can not cross and selection is at least one character 3735 final int selectionEnd = mTextView.getSelectionEnd(); 3736 if (offset >= selectionEnd) offset = Math.max(0, selectionEnd - 1); 3737 3738 positionAtCursorOffset(offset, false); 3739 } 3740 3741 public ActionPopupWindow getActionPopupWindow() { 3742 return mActionPopupWindow; 3743 } 3744 } 3745 3746 private class SelectionEndHandleView extends HandleView { 3747 3748 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3749 super(drawableLtr, drawableRtl); 3750 } 3751 3752 @Override 3753 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3754 if (isRtlRun) { 3755 return (drawable.getIntrinsicWidth() * 3) / 4; 3756 } else { 3757 return drawable.getIntrinsicWidth() / 4; 3758 } 3759 } 3760 3761 @Override 3762 protected int getHorizontalGravity(boolean isRtlRun) { 3763 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 3764 } 3765 3766 @Override 3767 public int getCurrentCursorOffset() { 3768 return mTextView.getSelectionEnd(); 3769 } 3770 3771 @Override 3772 public void updateSelection(int offset) { 3773 Selection.setSelection((Spannable) mTextView.getText(), 3774 mTextView.getSelectionStart(), offset); 3775 updateDrawable(); 3776 } 3777 3778 @Override 3779 public void updatePosition(float x, float y) { 3780 int offset = mTextView.getOffsetForPosition(x, y); 3781 3782 // Handles can not cross and selection is at least one character 3783 final int selectionStart = mTextView.getSelectionStart(); 3784 if (offset <= selectionStart) { 3785 offset = Math.min(selectionStart + 1, mTextView.getText().length()); 3786 } 3787 3788 positionAtCursorOffset(offset, false); 3789 } 3790 3791 public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) { 3792 mActionPopupWindow = actionPopupWindow; 3793 } 3794 } 3795 3796 /** 3797 * A CursorController instance can be used to control a cursor in the text. 3798 */ 3799 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 3800 /** 3801 * Makes the cursor controller visible on screen. 3802 * See also {@link #hide()}. 3803 */ 3804 public void show(); 3805 3806 /** 3807 * Hide the cursor controller from screen. 3808 * See also {@link #show()}. 3809 */ 3810 public void hide(); 3811 3812 /** 3813 * Called when the view is detached from window. Perform house keeping task, such as 3814 * stopping Runnable thread that would otherwise keep a reference on the context, thus 3815 * preventing the activity from being recycled. 3816 */ 3817 public void onDetached(); 3818 } 3819 3820 private class InsertionPointCursorController implements CursorController { 3821 private InsertionHandleView mHandle; 3822 3823 public void show() { 3824 getHandle().show(); 3825 } 3826 3827 public void showWithActionPopup() { 3828 getHandle().showWithActionPopup(); 3829 } 3830 3831 public void hide() { 3832 if (mHandle != null) { 3833 mHandle.hide(); 3834 } 3835 } 3836 3837 public void onTouchModeChanged(boolean isInTouchMode) { 3838 if (!isInTouchMode) { 3839 hide(); 3840 } 3841 } 3842 3843 private InsertionHandleView getHandle() { 3844 if (mSelectHandleCenter == null) { 3845 mSelectHandleCenter = mTextView.getContext().getDrawable( 3846 mTextView.mTextSelectHandleRes); 3847 } 3848 if (mHandle == null) { 3849 mHandle = new InsertionHandleView(mSelectHandleCenter); 3850 } 3851 return mHandle; 3852 } 3853 3854 @Override 3855 public void onDetached() { 3856 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 3857 observer.removeOnTouchModeChangeListener(this); 3858 3859 if (mHandle != null) mHandle.onDetached(); 3860 } 3861 } 3862 3863 class SelectionModifierCursorController implements CursorController { 3864 private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds 3865 // The cursor controller handles, lazily created when shown. 3866 private SelectionStartHandleView mStartHandle; 3867 private SelectionEndHandleView mEndHandle; 3868 // The offsets of that last touch down event. Remembered to start selection there. 3869 private int mMinTouchOffset, mMaxTouchOffset; 3870 3871 // Double tap detection 3872 private long mPreviousTapUpTime = 0; 3873 private float mDownPositionX, mDownPositionY; 3874 private boolean mGestureStayedInTapRegion; 3875 3876 SelectionModifierCursorController() { 3877 resetTouchOffsets(); 3878 } 3879 3880 public void show() { 3881 if (mTextView.isInBatchEditMode()) { 3882 return; 3883 } 3884 initDrawables(); 3885 initHandles(); 3886 hideInsertionPointCursorController(); 3887 } 3888 3889 private void initDrawables() { 3890 if (mSelectHandleLeft == null) { 3891 mSelectHandleLeft = mTextView.getContext().getDrawable( 3892 mTextView.mTextSelectHandleLeftRes); 3893 } 3894 if (mSelectHandleRight == null) { 3895 mSelectHandleRight = mTextView.getContext().getDrawable( 3896 mTextView.mTextSelectHandleRightRes); 3897 } 3898 } 3899 3900 private void initHandles() { 3901 // Lazy object creation has to be done before updatePosition() is called. 3902 if (mStartHandle == null) { 3903 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 3904 } 3905 if (mEndHandle == null) { 3906 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 3907 } 3908 3909 mStartHandle.show(); 3910 mEndHandle.show(); 3911 3912 // Make sure both left and right handles share the same ActionPopupWindow (so that 3913 // moving any of the handles hides the action popup). 3914 mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION); 3915 mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow()); 3916 3917 hideInsertionPointCursorController(); 3918 } 3919 3920 public void hide() { 3921 if (mStartHandle != null) mStartHandle.hide(); 3922 if (mEndHandle != null) mEndHandle.hide(); 3923 } 3924 3925 public void onTouchEvent(MotionEvent event) { 3926 // This is done even when the View does not have focus, so that long presses can start 3927 // selection and tap can move cursor from this tap position. 3928 switch (event.getActionMasked()) { 3929 case MotionEvent.ACTION_DOWN: 3930 final float x = event.getX(); 3931 final float y = event.getY(); 3932 3933 // Remember finger down position, to be able to start selection from there 3934 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 3935 3936 // Double tap detection 3937 if (mGestureStayedInTapRegion) { 3938 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 3939 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 3940 final float deltaX = x - mDownPositionX; 3941 final float deltaY = y - mDownPositionY; 3942 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3943 3944 ViewConfiguration viewConfiguration = ViewConfiguration.get( 3945 mTextView.getContext()); 3946 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 3947 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 3948 3949 if (stayedInArea && isPositionOnText(x, y)) { 3950 startSelectionActionMode(); 3951 mDiscardNextActionUp = true; 3952 } 3953 } 3954 } 3955 3956 mDownPositionX = x; 3957 mDownPositionY = y; 3958 mGestureStayedInTapRegion = true; 3959 break; 3960 3961 case MotionEvent.ACTION_POINTER_DOWN: 3962 case MotionEvent.ACTION_POINTER_UP: 3963 // Handle multi-point gestures. Keep min and max offset positions. 3964 // Only activated for devices that correctly handle multi-touch. 3965 if (mTextView.getContext().getPackageManager().hasSystemFeature( 3966 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 3967 updateMinAndMaxOffsets(event); 3968 } 3969 break; 3970 3971 case MotionEvent.ACTION_MOVE: 3972 if (mGestureStayedInTapRegion) { 3973 final float deltaX = event.getX() - mDownPositionX; 3974 final float deltaY = event.getY() - mDownPositionY; 3975 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3976 3977 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3978 mTextView.getContext()); 3979 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 3980 3981 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 3982 mGestureStayedInTapRegion = false; 3983 } 3984 } 3985 break; 3986 3987 case MotionEvent.ACTION_UP: 3988 mPreviousTapUpTime = SystemClock.uptimeMillis(); 3989 break; 3990 } 3991 } 3992 3993 /** 3994 * @param event 3995 */ 3996 private void updateMinAndMaxOffsets(MotionEvent event) { 3997 int pointerCount = event.getPointerCount(); 3998 for (int index = 0; index < pointerCount; index++) { 3999 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4000 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4001 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4002 } 4003 } 4004 4005 public int getMinTouchOffset() { 4006 return mMinTouchOffset; 4007 } 4008 4009 public int getMaxTouchOffset() { 4010 return mMaxTouchOffset; 4011 } 4012 4013 public void resetTouchOffsets() { 4014 mMinTouchOffset = mMaxTouchOffset = -1; 4015 } 4016 4017 /** 4018 * @return true iff this controller is currently used to move the selection start. 4019 */ 4020 public boolean isSelectionStartDragged() { 4021 return mStartHandle != null && mStartHandle.isDragging(); 4022 } 4023 4024 public void onTouchModeChanged(boolean isInTouchMode) { 4025 if (!isInTouchMode) { 4026 hide(); 4027 } 4028 } 4029 4030 @Override 4031 public void onDetached() { 4032 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4033 observer.removeOnTouchModeChangeListener(this); 4034 4035 if (mStartHandle != null) mStartHandle.onDetached(); 4036 if (mEndHandle != null) mEndHandle.onDetached(); 4037 } 4038 } 4039 4040 private class CorrectionHighlighter { 4041 private final Path mPath = new Path(); 4042 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4043 private int mStart, mEnd; 4044 private long mFadingStartTime; 4045 private RectF mTempRectF; 4046 private final static int FADE_OUT_DURATION = 400; 4047 4048 public CorrectionHighlighter() { 4049 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4050 applicationScale); 4051 mPaint.setStyle(Paint.Style.FILL); 4052 } 4053 4054 public void highlight(CorrectionInfo info) { 4055 mStart = info.getOffset(); 4056 mEnd = mStart + info.getNewText().length(); 4057 mFadingStartTime = SystemClock.uptimeMillis(); 4058 4059 if (mStart < 0 || mEnd < 0) { 4060 stopAnimation(); 4061 } 4062 } 4063 4064 public void draw(Canvas canvas, int cursorOffsetVertical) { 4065 if (updatePath() && updatePaint()) { 4066 if (cursorOffsetVertical != 0) { 4067 canvas.translate(0, cursorOffsetVertical); 4068 } 4069 4070 canvas.drawPath(mPath, mPaint); 4071 4072 if (cursorOffsetVertical != 0) { 4073 canvas.translate(0, -cursorOffsetVertical); 4074 } 4075 invalidate(true); // TODO invalidate cursor region only 4076 } else { 4077 stopAnimation(); 4078 invalidate(false); // TODO invalidate cursor region only 4079 } 4080 } 4081 4082 private boolean updatePaint() { 4083 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4084 if (duration > FADE_OUT_DURATION) return false; 4085 4086 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4087 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4088 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4089 ((int) (highlightColorAlpha * coef) << 24); 4090 mPaint.setColor(color); 4091 return true; 4092 } 4093 4094 private boolean updatePath() { 4095 final Layout layout = mTextView.getLayout(); 4096 if (layout == null) return false; 4097 4098 // Update in case text is edited while the animation is run 4099 final int length = mTextView.getText().length(); 4100 int start = Math.min(length, mStart); 4101 int end = Math.min(length, mEnd); 4102 4103 mPath.reset(); 4104 layout.getSelectionPath(start, end, mPath); 4105 return true; 4106 } 4107 4108 private void invalidate(boolean delayed) { 4109 if (mTextView.getLayout() == null) return; 4110 4111 if (mTempRectF == null) mTempRectF = new RectF(); 4112 mPath.computeBounds(mTempRectF, false); 4113 4114 int left = mTextView.getCompoundPaddingLeft(); 4115 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4116 4117 if (delayed) { 4118 mTextView.postInvalidateOnAnimation( 4119 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4120 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4121 } else { 4122 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4123 (int) mTempRectF.right, (int) mTempRectF.bottom); 4124 } 4125 } 4126 4127 private void stopAnimation() { 4128 Editor.this.mCorrectionHighlighter = null; 4129 } 4130 } 4131 4132 private static class ErrorPopup extends PopupWindow { 4133 private boolean mAbove = false; 4134 private final TextView mView; 4135 private int mPopupInlineErrorBackgroundId = 0; 4136 private int mPopupInlineErrorAboveBackgroundId = 0; 4137 4138 ErrorPopup(TextView v, int width, int height) { 4139 super(v, width, height); 4140 mView = v; 4141 // Make sure the TextView has a background set as it will be used the first time it is 4142 // shown and positioned. Initialized with below background, which should have 4143 // dimensions identical to the above version for this to work (and is more likely). 4144 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4145 com.android.internal.R.styleable.Theme_errorMessageBackground); 4146 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4147 } 4148 4149 void fixDirection(boolean above) { 4150 mAbove = above; 4151 4152 if (above) { 4153 mPopupInlineErrorAboveBackgroundId = 4154 getResourceId(mPopupInlineErrorAboveBackgroundId, 4155 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4156 } else { 4157 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4158 com.android.internal.R.styleable.Theme_errorMessageBackground); 4159 } 4160 4161 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4162 mPopupInlineErrorBackgroundId); 4163 } 4164 4165 private int getResourceId(int currentId, int index) { 4166 if (currentId == 0) { 4167 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4168 R.styleable.Theme); 4169 currentId = styledAttributes.getResourceId(index, 0); 4170 styledAttributes.recycle(); 4171 } 4172 return currentId; 4173 } 4174 4175 @Override 4176 public void update(int x, int y, int w, int h, boolean force) { 4177 super.update(x, y, w, h, force); 4178 4179 boolean above = isAboveAnchor(); 4180 if (above != mAbove) { 4181 fixDirection(above); 4182 } 4183 } 4184 } 4185 4186 static class InputContentType { 4187 int imeOptions = EditorInfo.IME_NULL; 4188 String privateImeOptions; 4189 CharSequence imeActionLabel; 4190 int imeActionId; 4191 Bundle extras; 4192 OnEditorActionListener onEditorActionListener; 4193 boolean enterDown; 4194 } 4195 4196 static class InputMethodState { 4197 Rect mCursorRectInWindow = new Rect(); 4198 float[] mTmpOffset = new float[2]; 4199 ExtractedTextRequest mExtractedTextRequest; 4200 final ExtractedText mExtractedText = new ExtractedText(); 4201 int mBatchEditNesting; 4202 boolean mCursorChanged; 4203 boolean mSelectionModeChanged; 4204 boolean mContentChanged; 4205 int mChangedStart, mChangedEnd, mChangedDelta; 4206 } 4207 4208 /** 4209 * @return True iff (start, end) is a valid range within the text. 4210 */ 4211 private static boolean isValidRange(CharSequence text, int start, int end) { 4212 return 0 <= start && start <= end && end <= text.length(); 4213 } 4214 4215 /** 4216 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4217 * text being typed (and hence always returns null from the filter() method). 4218 */ 4219 public static class UndoInputFilter implements InputFilter { 4220 private final Editor mEditor; 4221 4222 public UndoInputFilter(Editor editor) { 4223 mEditor = editor; 4224 } 4225 4226 @Override 4227 public CharSequence filter(CharSequence source, int start, int end, 4228 Spanned dest, int dstart, int dend) { 4229 if (DEBUG_UNDO) { 4230 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4231 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4232 } 4233 4234 if (!mEditor.mAllowUndo) { 4235 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4236 return null; 4237 } 4238 4239 final UndoManager um = mEditor.mUndoManager; 4240 if (um.isInUndo()) { 4241 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4242 return null; 4243 } 4244 4245 // Text filters run before input operations are applied. However, some input operations 4246 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4247 // attempt to undo invalid operations. 4248 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4249 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4250 return null; 4251 } 4252 4253 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4254 // on an input field. Skip no-op changes. 4255 if (start == end && dstart == dend) { 4256 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4257 return null; 4258 } 4259 4260 // Build a new operation with all the information from this edit. 4261 EditOperation edit = new EditOperation(mEditor, source, start, end, dest, dstart, dend); 4262 4263 // Fetch the last edit operation and attempt to merge in the new edit. 4264 um.beginUpdate("Edit text"); 4265 EditOperation lastEdit = um.getLastOperation( 4266 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4267 if (lastEdit == null) { 4268 // Add this as the first edit. 4269 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4270 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4271 } else if (lastEdit.mergeWith(edit)) { 4272 // Merge succeeded, nothing else to do. 4273 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4274 } else { 4275 // Could not merge with the last edit, so commit the last edit and add this edit. 4276 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4277 um.commitState(mEditor.mUndoOwner); 4278 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4279 } 4280 um.endUpdate(); 4281 return null; // Text not changed. 4282 } 4283 } 4284 4285 /** 4286 * An operation to undo a single "edit" to a text view. 4287 */ 4288 public static class EditOperation extends UndoOperation<Editor> { 4289 private static final int TYPE_INSERT = 0; 4290 private static final int TYPE_DELETE = 1; 4291 private static final int TYPE_REPLACE = 2; 4292 4293 private int mType; 4294 private String mOldText; 4295 private int mOldTextStart; 4296 private String mNewText; 4297 private int mNewTextStart; 4298 4299 private int mOldCursorPos; 4300 private int mNewCursorPos; 4301 4302 /** 4303 * Constructs an edit operation from a text input operation that replaces the range 4304 * (dstart, dend) of dest with (start, end) of source. See {@link InputFilter#filter}. 4305 */ 4306 public EditOperation(Editor editor, CharSequence source, int start, int end, 4307 Spanned dest, int dstart, int dend) { 4308 super(editor.mUndoOwner); 4309 4310 mOldText = dest.subSequence(dstart, dend).toString(); 4311 mNewText = source.subSequence(start, end).toString(); 4312 4313 // Determine the type of the edit and store where it occurred. Avoid storing 4314 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4315 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4316 // outside the bounds of the final text). 4317 if (mNewText.length() > 0 && mOldText.length() == 0) { 4318 mType = TYPE_INSERT; 4319 mNewTextStart = dstart; 4320 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4321 mType = TYPE_DELETE; 4322 mOldTextStart = dstart; 4323 } else { 4324 mType = TYPE_REPLACE; 4325 mOldTextStart = mNewTextStart = dstart; 4326 } 4327 4328 // Store cursor data. 4329 mOldCursorPos = editor.mTextView.getSelectionStart(); 4330 mNewCursorPos = dstart + (end - start); 4331 } 4332 4333 public EditOperation(Parcel src, ClassLoader loader) { 4334 super(src, loader); 4335 mType = src.readInt(); 4336 mOldText = src.readString(); 4337 mOldTextStart = src.readInt(); 4338 mNewText = src.readString(); 4339 mNewTextStart = src.readInt(); 4340 mOldCursorPos = src.readInt(); 4341 mNewCursorPos = src.readInt(); 4342 } 4343 4344 @Override 4345 public void writeToParcel(Parcel dest, int flags) { 4346 dest.writeInt(mType); 4347 dest.writeString(mOldText); 4348 dest.writeInt(mOldTextStart); 4349 dest.writeString(mNewText); 4350 dest.writeInt(mNewTextStart); 4351 dest.writeInt(mOldCursorPos); 4352 dest.writeInt(mNewCursorPos); 4353 } 4354 4355 @Override 4356 public void commit() { 4357 } 4358 4359 @Override 4360 public void undo() { 4361 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4362 // Remove the new text and insert the old. 4363 modifyText(mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, mOldCursorPos); 4364 } 4365 4366 @Override 4367 public void redo() { 4368 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4369 // Remove the old text and insert the new. 4370 modifyText(mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, mNewCursorPos); 4371 } 4372 4373 /** 4374 * Attempts to merge this existing operation with a new edit. 4375 * @param edit The new edit operation. 4376 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4377 * object unchanged. 4378 */ 4379 private boolean mergeWith(EditOperation edit) { 4380 switch (mType) { 4381 case TYPE_INSERT: 4382 return mergeInsertWith(edit); 4383 case TYPE_DELETE: 4384 return mergeDeleteWith(edit); 4385 case TYPE_REPLACE: 4386 return mergeReplaceWith(edit); 4387 default: 4388 return false; 4389 } 4390 } 4391 4392 private boolean mergeInsertWith(EditOperation edit) { 4393 if (DEBUG_UNDO) Log.d(TAG, "mergeInsertWith " + edit); 4394 // Only merge continuous insertions. 4395 if (edit.mType != TYPE_INSERT) { 4396 return false; 4397 } 4398 // Only merge insertions that are contiguous. 4399 if (getNewTextEnd() != edit.mNewTextStart) { 4400 return false; 4401 } 4402 mNewText += edit.mNewText; 4403 mNewCursorPos = edit.mNewCursorPos; 4404 return true; 4405 } 4406 4407 // TODO: Support forward delete. 4408 private boolean mergeDeleteWith(EditOperation edit) { 4409 if (DEBUG_UNDO) Log.d(TAG, "mergeDeleteWith " + edit); 4410 // Only merge continuous deletes. 4411 if (edit.mType != TYPE_DELETE) { 4412 return false; 4413 } 4414 // Only merge deletions that are contiguous. 4415 if (mOldTextStart != edit.getOldTextEnd()) { 4416 return false; 4417 } 4418 mOldTextStart = edit.mOldTextStart; 4419 mOldText = edit.mOldText + mOldText; 4420 mNewCursorPos = edit.mNewCursorPos; 4421 return true; 4422 } 4423 4424 private boolean mergeReplaceWith(EditOperation edit) { 4425 if (DEBUG_UNDO) Log.d(TAG, "mergeReplaceWith " + edit); 4426 // Replacements can merge only with adjacent inserts and adjacent replacements. 4427 if (edit.mType == TYPE_DELETE || 4428 getNewTextEnd() != edit.mOldTextStart || 4429 edit.mOldTextStart != edit.mNewTextStart) { 4430 return false; 4431 } 4432 mOldText += edit.mOldText; 4433 mNewText += edit.mNewText; 4434 mNewCursorPos = edit.mNewCursorPos; 4435 return true; 4436 } 4437 4438 private int getNewTextEnd() { 4439 return mNewTextStart + mNewText.length(); 4440 } 4441 4442 private int getOldTextEnd() { 4443 return mOldTextStart + mOldText.length(); 4444 } 4445 4446 private void modifyText(int deleteFrom, int deleteTo, CharSequence newText, 4447 int newTextInsertAt, int newCursorPos) { 4448 Editor editor = getOwnerData(); 4449 Editable text = (Editable) editor.mTextView.getText(); 4450 // Apply the edit if it is still valid. 4451 if (isValidRange(text, deleteFrom, deleteTo) && 4452 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 4453 if (deleteFrom != deleteTo) { 4454 text.delete(deleteFrom, deleteTo); 4455 } 4456 if (newText.length() != 0) { 4457 text.insert(newTextInsertAt, newText); 4458 } 4459 } 4460 // Restore the cursor position. 4461 // TODO: Select all the text that was undone. 4462 if (newCursorPos <= text.length()) { 4463 Selection.setSelection(text, newCursorPos); 4464 } 4465 } 4466 4467 @Override 4468 public String toString() { 4469 return "EditOperation: [" + 4470 "mType=" + mType + ", " + 4471 "mOldText=" + mOldText + ", " + 4472 "mOldTextStart=" + mOldTextStart + ", " + 4473 "mNewText=" + mNewText + ", " + 4474 "mNewTextStart=" + mNewTextStart + ", " + 4475 "mOldCursorPos=" + mOldCursorPos + ", " + 4476 "mNewCursorPos=" + mNewCursorPos + "]"; 4477 } 4478 4479 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 4480 = new Parcelable.ClassLoaderCreator<EditOperation>() { 4481 @Override 4482 public EditOperation createFromParcel(Parcel in) { 4483 return new EditOperation(in, null); 4484 } 4485 4486 @Override 4487 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 4488 return new EditOperation(in, loader); 4489 } 4490 4491 @Override 4492 public EditOperation[] newArray(int size) { 4493 return new EditOperation[size]; 4494 } 4495 }; 4496 } 4497} 4498