Editor.java revision f659a56c3062392d6b6020d148553ce49797eb5a
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.Nullable; 21import android.app.PendingIntent; 22import android.app.PendingIntent.CanceledException; 23import android.content.ClipData; 24import android.content.ClipData.Item; 25import android.content.Context; 26import android.content.Intent; 27import android.content.UndoManager; 28import android.content.UndoOperation; 29import android.content.UndoOwner; 30import android.content.pm.PackageManager; 31import android.content.pm.ResolveInfo; 32import android.content.res.TypedArray; 33import android.graphics.Canvas; 34import android.graphics.Color; 35import android.graphics.Matrix; 36import android.graphics.Paint; 37import android.graphics.Path; 38import android.graphics.Rect; 39import android.graphics.RectF; 40import android.graphics.drawable.Drawable; 41import android.inputmethodservice.ExtractEditText; 42import android.os.Bundle; 43import android.os.Handler; 44import android.os.Parcel; 45import android.os.Parcelable; 46import android.os.ParcelableParcel; 47import android.os.SystemClock; 48import android.provider.Settings; 49import android.text.DynamicLayout; 50import android.text.Editable; 51import android.text.InputFilter; 52import android.text.InputType; 53import android.text.Layout; 54import android.text.ParcelableSpan; 55import android.text.Selection; 56import android.text.SpanWatcher; 57import android.text.Spannable; 58import android.text.SpannableStringBuilder; 59import android.text.Spanned; 60import android.text.StaticLayout; 61import android.text.TextUtils; 62import android.text.method.KeyListener; 63import android.text.method.MetaKeyKeyListener; 64import android.text.method.MovementMethod; 65import android.text.method.WordIterator; 66import android.text.style.EasyEditSpan; 67import android.text.style.SuggestionRangeSpan; 68import android.text.style.SuggestionSpan; 69import android.text.style.TextAppearanceSpan; 70import android.text.style.URLSpan; 71import android.util.DisplayMetrics; 72import android.util.Log; 73import android.view.ActionMode; 74import android.view.ActionMode.Callback; 75import android.view.DisplayListCanvas; 76import android.view.DragEvent; 77import android.view.Gravity; 78import android.view.LayoutInflater; 79import android.view.Menu; 80import android.view.MenuItem; 81import android.view.MotionEvent; 82import android.view.RenderNode; 83import android.view.View; 84import android.view.View.DragShadowBuilder; 85import android.view.View.OnClickListener; 86import android.view.ViewConfiguration; 87import android.view.ViewGroup; 88import android.view.ViewGroup.LayoutParams; 89import android.view.ViewParent; 90import android.view.ViewTreeObserver; 91import android.view.WindowManager; 92import android.view.inputmethod.CorrectionInfo; 93import android.view.inputmethod.CursorAnchorInfo; 94import android.view.inputmethod.EditorInfo; 95import android.view.inputmethod.ExtractedText; 96import android.view.inputmethod.ExtractedTextRequest; 97import android.view.inputmethod.InputConnection; 98import android.view.inputmethod.InputMethodManager; 99import android.widget.AdapterView.OnItemClickListener; 100import android.widget.TextView.Drawables; 101import android.widget.TextView.OnEditorActionListener; 102 103import com.android.internal.util.ArrayUtils; 104import com.android.internal.util.GrowingArrayUtils; 105import com.android.internal.widget.EditableInputConnection; 106 107import java.text.BreakIterator; 108import java.util.Arrays; 109import java.util.Comparator; 110import java.util.HashMap; 111import java.util.List; 112 113/** 114 * Helper class used by TextView to handle editable text views. 115 * 116 * @hide 117 */ 118public class Editor { 119 private static final String TAG = "Editor"; 120 private static final boolean DEBUG_UNDO = false; 121 122 static final int BLINK = 500; 123 private static final float[] TEMP_POSITION = new float[2]; 124 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 125 // Tag used when the Editor maintains its own separate UndoManager. 126 private static final String UNDO_OWNER_TAG = "Editor"; 127 128 // Each Editor manages its own undo stack. 129 private final UndoManager mUndoManager = new UndoManager(); 130 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 131 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 132 boolean mAllowUndo = true; 133 134 // Cursor Controllers. 135 InsertionPointCursorController mInsertionPointCursorController; 136 SelectionModifierCursorController mSelectionModifierCursorController; 137 ActionMode mSelectionActionMode; 138 boolean mInsertionControllerEnabled; 139 boolean mSelectionControllerEnabled; 140 141 // Used to highlight a word when it is corrected by the IME 142 CorrectionHighlighter mCorrectionHighlighter; 143 144 InputContentType mInputContentType; 145 InputMethodState mInputMethodState; 146 147 private static class TextRenderNode { 148 RenderNode renderNode; 149 boolean isDirty; 150 public TextRenderNode(String name) { 151 isDirty = true; 152 renderNode = RenderNode.create(name, null); 153 } 154 boolean needsRecord() { return isDirty || !renderNode.isValid(); } 155 } 156 TextRenderNode[] mTextRenderNodes; 157 158 boolean mFrozenWithFocus; 159 boolean mSelectionMoved; 160 boolean mTouchFocusSelected; 161 162 KeyListener mKeyListener; 163 int mInputType = EditorInfo.TYPE_NULL; 164 165 boolean mDiscardNextActionUp; 166 boolean mIgnoreActionUpEvent; 167 168 long mShowCursor; 169 Blink mBlink; 170 171 boolean mCursorVisible = true; 172 boolean mSelectAllOnFocus; 173 boolean mTextIsSelectable; 174 175 CharSequence mError; 176 boolean mErrorWasChanged; 177 ErrorPopup mErrorPopup; 178 179 /** 180 * This flag is set if the TextView tries to display an error before it 181 * is attached to the window (so its position is still unknown). 182 * It causes the error to be shown later, when onAttachedToWindow() 183 * is called. 184 */ 185 boolean mShowErrorAfterAttach; 186 187 boolean mInBatchEditControllers; 188 boolean mShowSoftInputOnFocus = true; 189 boolean mPreserveDetachedSelection; 190 boolean mTemporaryDetach; 191 192 SuggestionsPopupWindow mSuggestionsPopupWindow; 193 SuggestionRangeSpan mSuggestionRangeSpan; 194 Runnable mShowSuggestionRunnable; 195 196 final Drawable[] mCursorDrawable = new Drawable[2]; 197 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 198 199 private Drawable mSelectHandleLeft; 200 private Drawable mSelectHandleRight; 201 private Drawable mSelectHandleCenter; 202 203 // Global listener that detects changes in the global position of the TextView 204 private PositionListener mPositionListener; 205 206 float mLastDownPositionX, mLastDownPositionY; 207 Callback mCustomSelectionActionModeCallback; 208 209 // Set when this TextView gained focus with some text selected. Will start selection mode. 210 boolean mCreatedWithASelection; 211 212 // The span controller helps monitoring the changes to which the Editor needs to react: 213 // - EasyEditSpans, for which we have some UI to display on attach and on hide 214 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 215 private SpanController mSpanController; 216 217 WordIterator mWordIterator; 218 SpellChecker mSpellChecker; 219 220 // This word iterator is set with text and used to determine word boundaries 221 // when a user is selecting text. 222 private WordIterator mWordIteratorWithText; 223 // Indicate that the text in the word iterator needs to be updated. 224 private boolean mUpdateWordIteratorText; 225 226 private Rect mTempRect; 227 228 private TextView mTextView; 229 230 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 231 232 Editor(TextView textView) { 233 mTextView = textView; 234 // Synchronize the filter list, which places the undo input filter at the end. 235 mTextView.setFilters(mTextView.getFilters()); 236 } 237 238 ParcelableParcel saveInstanceState() { 239 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 240 Parcel parcel = state.getParcel(); 241 mUndoManager.saveInstanceState(parcel); 242 mUndoInputFilter.saveInstanceState(parcel); 243 return state; 244 } 245 246 void restoreInstanceState(ParcelableParcel state) { 247 Parcel parcel = state.getParcel(); 248 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 249 mUndoInputFilter.restoreInstanceState(parcel); 250 // Re-associate this object as the owner of undo state. 251 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 252 } 253 254 /** 255 * Forgets all undo and redo operations for this Editor. 256 */ 257 void forgetUndoRedo() { 258 UndoOwner[] owners = { mUndoOwner }; 259 mUndoManager.forgetUndos(owners, -1 /* all */); 260 mUndoManager.forgetRedos(owners, -1 /* all */); 261 } 262 263 boolean canUndo() { 264 UndoOwner[] owners = { mUndoOwner }; 265 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 266 } 267 268 boolean canRedo() { 269 UndoOwner[] owners = { mUndoOwner }; 270 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 271 } 272 273 void undo() { 274 if (!mAllowUndo) { 275 return; 276 } 277 UndoOwner[] owners = { mUndoOwner }; 278 mUndoManager.undo(owners, 1); // Undo 1 action. 279 } 280 281 void redo() { 282 if (!mAllowUndo) { 283 return; 284 } 285 UndoOwner[] owners = { mUndoOwner }; 286 mUndoManager.redo(owners, 1); // Redo 1 action. 287 } 288 289 void onAttachedToWindow() { 290 if (mShowErrorAfterAttach) { 291 showError(); 292 mShowErrorAfterAttach = false; 293 } 294 mTemporaryDetach = false; 295 296 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 297 // No need to create the controller. 298 // The get method will add the listener on controller creation. 299 if (mInsertionPointCursorController != null) { 300 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 301 } 302 if (mSelectionModifierCursorController != null) { 303 mSelectionModifierCursorController.resetTouchOffsets(); 304 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 305 } 306 updateSpellCheckSpans(0, mTextView.getText().length(), 307 true /* create the spell checker if needed */); 308 309 if (mTextView.hasTransientState() && 310 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 311 // Since transient state is reference counted make sure it stays matched 312 // with our own calls to it for managing selection. 313 // The action mode callback will set this back again when/if the action mode starts. 314 mTextView.setHasTransientState(false); 315 316 // We had an active selection from before, start the selection mode. 317 startSelectionActionModeWithSelection(); 318 } 319 320 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 321 resumeBlink(); 322 } 323 324 void onDetachedFromWindow() { 325 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 326 327 if (mError != null) { 328 hideError(); 329 } 330 331 suspendBlink(); 332 333 if (mInsertionPointCursorController != null) { 334 mInsertionPointCursorController.onDetached(); 335 } 336 337 if (mSelectionModifierCursorController != null) { 338 mSelectionModifierCursorController.onDetached(); 339 } 340 341 if (mShowSuggestionRunnable != null) { 342 mTextView.removeCallbacks(mShowSuggestionRunnable); 343 } 344 345 destroyDisplayListsData(); 346 347 if (mSpellChecker != null) { 348 mSpellChecker.closeSession(); 349 // Forces the creation of a new SpellChecker next time this window is created. 350 // Will handle the cases where the settings has been changed in the meantime. 351 mSpellChecker = null; 352 } 353 354 mPreserveDetachedSelection = true; 355 hideControllers(); 356 mPreserveDetachedSelection = false; 357 mTemporaryDetach = false; 358 } 359 360 private void destroyDisplayListsData() { 361 if (mTextRenderNodes != null) { 362 for (int i = 0; i < mTextRenderNodes.length; i++) { 363 RenderNode displayList = mTextRenderNodes[i] != null 364 ? mTextRenderNodes[i].renderNode : null; 365 if (displayList != null && displayList.isValid()) { 366 displayList.destroyDisplayListData(); 367 } 368 } 369 } 370 } 371 372 private void showError() { 373 if (mTextView.getWindowToken() == null) { 374 mShowErrorAfterAttach = true; 375 return; 376 } 377 378 if (mErrorPopup == null) { 379 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 380 final TextView err = (TextView) inflater.inflate( 381 com.android.internal.R.layout.textview_hint, null); 382 383 final float scale = mTextView.getResources().getDisplayMetrics().density; 384 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 385 mErrorPopup.setFocusable(false); 386 // The user is entering text, so the input method is needed. We 387 // don't want the popup to be displayed on top of it. 388 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 389 } 390 391 TextView tv = (TextView) mErrorPopup.getContentView(); 392 chooseSize(mErrorPopup, mError, tv); 393 tv.setText(mError); 394 395 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 396 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 397 } 398 399 public void setError(CharSequence error, Drawable icon) { 400 mError = TextUtils.stringOrSpannedString(error); 401 mErrorWasChanged = true; 402 403 if (mError == null) { 404 setErrorIcon(null); 405 if (mErrorPopup != null) { 406 if (mErrorPopup.isShowing()) { 407 mErrorPopup.dismiss(); 408 } 409 410 mErrorPopup = null; 411 } 412 mShowErrorAfterAttach = false; 413 } else { 414 setErrorIcon(icon); 415 if (mTextView.isFocused()) { 416 showError(); 417 } 418 } 419 } 420 421 private void setErrorIcon(Drawable icon) { 422 Drawables dr = mTextView.mDrawables; 423 if (dr == null) { 424 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 425 } 426 dr.setErrorDrawable(icon, mTextView); 427 428 mTextView.resetResolvedDrawables(); 429 mTextView.invalidate(); 430 mTextView.requestLayout(); 431 } 432 433 private void hideError() { 434 if (mErrorPopup != null) { 435 if (mErrorPopup.isShowing()) { 436 mErrorPopup.dismiss(); 437 } 438 } 439 440 mShowErrorAfterAttach = false; 441 } 442 443 /** 444 * Returns the X offset to make the pointy top of the error point 445 * at the middle of the error icon. 446 */ 447 private int getErrorX() { 448 /* 449 * The "25" is the distance between the point and the right edge 450 * of the background 451 */ 452 final float scale = mTextView.getResources().getDisplayMetrics().density; 453 454 final Drawables dr = mTextView.mDrawables; 455 456 final int layoutDirection = mTextView.getLayoutDirection(); 457 int errorX; 458 int offset; 459 switch (layoutDirection) { 460 default: 461 case View.LAYOUT_DIRECTION_LTR: 462 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 463 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 464 mTextView.getPaddingRight() + offset; 465 break; 466 case View.LAYOUT_DIRECTION_RTL: 467 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 468 errorX = mTextView.getPaddingLeft() + offset; 469 break; 470 } 471 return errorX; 472 } 473 474 /** 475 * Returns the Y offset to make the pointy top of the error point 476 * at the bottom of the error icon. 477 */ 478 private int getErrorY() { 479 /* 480 * Compound, not extended, because the icon is not clipped 481 * if the text height is smaller. 482 */ 483 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 484 int vspace = mTextView.getBottom() - mTextView.getTop() - 485 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 486 487 final Drawables dr = mTextView.mDrawables; 488 489 final int layoutDirection = mTextView.getLayoutDirection(); 490 int height; 491 switch (layoutDirection) { 492 default: 493 case View.LAYOUT_DIRECTION_LTR: 494 height = (dr != null ? dr.mDrawableHeightRight : 0); 495 break; 496 case View.LAYOUT_DIRECTION_RTL: 497 height = (dr != null ? dr.mDrawableHeightLeft : 0); 498 break; 499 } 500 501 int icontop = compoundPaddingTop + (vspace - height) / 2; 502 503 /* 504 * The "2" is the distance between the point and the top edge 505 * of the background. 506 */ 507 final float scale = mTextView.getResources().getDisplayMetrics().density; 508 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 509 } 510 511 void createInputContentTypeIfNeeded() { 512 if (mInputContentType == null) { 513 mInputContentType = new InputContentType(); 514 } 515 } 516 517 void createInputMethodStateIfNeeded() { 518 if (mInputMethodState == null) { 519 mInputMethodState = new InputMethodState(); 520 } 521 } 522 523 boolean isCursorVisible() { 524 // The default value is true, even when there is no associated Editor 525 return mCursorVisible && mTextView.isTextEditable(); 526 } 527 528 void prepareCursorControllers() { 529 boolean windowSupportsHandles = false; 530 531 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 532 if (params instanceof WindowManager.LayoutParams) { 533 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 534 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 535 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 536 } 537 538 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 539 mInsertionControllerEnabled = enabled && isCursorVisible(); 540 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 541 542 if (!mInsertionControllerEnabled) { 543 hideInsertionPointCursorController(); 544 if (mInsertionPointCursorController != null) { 545 mInsertionPointCursorController.onDetached(); 546 mInsertionPointCursorController = null; 547 } 548 } 549 550 if (!mSelectionControllerEnabled) { 551 stopSelectionActionMode(); 552 if (mSelectionModifierCursorController != null) { 553 mSelectionModifierCursorController.onDetached(); 554 mSelectionModifierCursorController = null; 555 } 556 } 557 } 558 559 void hideInsertionPointCursorController() { 560 if (mInsertionPointCursorController != null) { 561 mInsertionPointCursorController.hide(); 562 } 563 } 564 565 /** 566 * Hides the insertion controller and stops text selection mode, hiding the selection controller 567 */ 568 void hideControllers() { 569 hideCursorControllers(); 570 hideSpanControllers(); 571 } 572 573 private void hideSpanControllers() { 574 if (mSpanController != null) { 575 mSpanController.hide(); 576 } 577 } 578 579 private void hideCursorControllers() { 580 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 581 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 582 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 583 // to distinguish one from the other. 584 if (mSuggestionsPopupWindow != null && ((mTextView instanceof ExtractEditText) || 585 !mSuggestionsPopupWindow.isShowingUp())) { 586 // Should be done before hide insertion point controller since it triggers a show of it 587 mSuggestionsPopupWindow.hide(); 588 } 589 hideInsertionPointCursorController(); 590 stopSelectionActionMode(); 591 } 592 593 /** 594 * Create new SpellCheckSpans on the modified region. 595 */ 596 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 597 // Remove spans whose adjacent characters are text not punctuation 598 mTextView.removeAdjacentSuggestionSpans(start); 599 mTextView.removeAdjacentSuggestionSpans(end); 600 601 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 602 !(mTextView instanceof ExtractEditText)) { 603 if (mSpellChecker == null && createSpellChecker) { 604 mSpellChecker = new SpellChecker(mTextView); 605 } 606 if (mSpellChecker != null) { 607 mSpellChecker.spellCheck(start, end); 608 } 609 } 610 } 611 612 void onScreenStateChanged(int screenState) { 613 switch (screenState) { 614 case View.SCREEN_STATE_ON: 615 resumeBlink(); 616 break; 617 case View.SCREEN_STATE_OFF: 618 suspendBlink(); 619 break; 620 } 621 } 622 623 private void suspendBlink() { 624 if (mBlink != null) { 625 mBlink.cancel(); 626 } 627 } 628 629 private void resumeBlink() { 630 if (mBlink != null) { 631 mBlink.uncancel(); 632 makeBlink(); 633 } 634 } 635 636 void adjustInputType(boolean password, boolean passwordInputType, 637 boolean webPasswordInputType, boolean numberPasswordInputType) { 638 // mInputType has been set from inputType, possibly modified by mInputMethod. 639 // Specialize mInputType to [web]password if we have a text class and the original input 640 // type was a password. 641 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 642 if (password || passwordInputType) { 643 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 644 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 645 } 646 if (webPasswordInputType) { 647 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 648 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 649 } 650 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 651 if (numberPasswordInputType) { 652 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 653 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 654 } 655 } 656 } 657 658 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 659 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 660 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 661 662 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 663 com.android.internal.R.dimen.textview_error_popup_default_width); 664 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 665 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 666 float max = 0; 667 for (int i = 0; i < l.getLineCount(); i++) { 668 max = Math.max(max, l.getLineWidth(i)); 669 } 670 671 /* 672 * Now set the popup size to be big enough for the text plus the border capped 673 * to DEFAULT_MAX_POPUP_WIDTH 674 */ 675 pop.setWidth(wid + (int) Math.ceil(max)); 676 pop.setHeight(ht + l.getHeight()); 677 } 678 679 void setFrame() { 680 if (mErrorPopup != null) { 681 TextView tv = (TextView) mErrorPopup.getContentView(); 682 chooseSize(mErrorPopup, mError, tv); 683 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 684 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 685 } 686 } 687 688 private int getWordStart(int offset) { 689 // FIXME - For this and similar methods we're not doing anything to check if there's 690 // a LocaleSpan in the text, this may be something we should try handling or checking for. 691 int retOffset = getWordIteratorWithText().prevBoundary(offset); 692 if (isPunctBoundaryBehind(retOffset, true /* isStart */)) { 693 // If we're on a punctuation boundary we should continue to get the 694 // previous offset until we're not longer on a punctuation boundary. 695 retOffset = getWordIteratorWithText().prevBoundary(retOffset); 696 while (!isPunctBoundaryBehind(retOffset, false /* isStart */) 697 && retOffset != BreakIterator.DONE) { 698 retOffset = getWordIteratorWithText().prevBoundary(retOffset); 699 } 700 } 701 if (retOffset == BreakIterator.DONE) { 702 return offset; 703 } 704 return retOffset; 705 } 706 707 private int getWordEnd(int offset) { 708 int retOffset = getWordIteratorWithText().nextBoundary(offset); 709 if (isPunctBoundaryForward(retOffset, true /* isStart */)) { 710 // If we're on a punctuation boundary we should continue to get the 711 // next offset until we're no longer on a punctuation boundary. 712 retOffset = getWordIteratorWithText().nextBoundary(retOffset); 713 while (!isPunctBoundaryForward(retOffset, false /* isStart */) 714 && retOffset != BreakIterator.DONE) { 715 retOffset = getWordIteratorWithText().nextBoundary(retOffset); 716 } 717 } 718 if (retOffset == BreakIterator.DONE) { 719 return offset; 720 } 721 return retOffset; 722 } 723 724 /** 725 * Checks for punctuation boundaries for the provided offset and the 726 * previous character. 727 * 728 * @param offset The offset to check from. 729 * @param isStart Whether the boundary being checked for is at the start or 730 * end of a punctuation sequence. 731 * @return Whether this is a punctuation boundary. 732 */ 733 private boolean isPunctBoundaryBehind(int offset, boolean isStart) { 734 CharSequence text = mTextView.getText(); 735 if (offset == BreakIterator.DONE || offset > text.length() || offset == 0) { 736 return false; 737 } 738 int cp = Character.codePointAt(text, offset); 739 int prevCp = Character.codePointBefore(text, offset); 740 741 if (isPunctuation(cp)) { 742 // If it's the start, the current cp and the prev cp are 743 // punctuation. If it's at the end of a punctuation sequence the 744 // current is punctuation and the prev is not. 745 return isStart ? isPunctuation(prevCp) : !isPunctuation(prevCp); 746 } 747 return false; 748 } 749 750 /** 751 * Checks for punctuation boundaries for the provided offset and the next 752 * character. 753 * 754 * @param offset The offset to check from. 755 * @param isStart Whether the boundary being checked for is at the start or 756 * end of a punctuation sequence. 757 * @return Whether this is a punctuation boundary. 758 */ 759 private boolean isPunctBoundaryForward(int offset, boolean isStart) { 760 CharSequence text = mTextView.getText(); 761 if (offset == BreakIterator.DONE || offset > text.length() || offset == 0) { 762 return false; 763 } 764 int cp = Character.codePointBefore(text, offset); 765 int nextCpOffset = Math.min(offset + Character.charCount(cp), text.length() - 1); 766 int nextCp = Character.codePointBefore(text, nextCpOffset); 767 768 if (isPunctuation(cp)) { 769 // If it's the start, the current cp and the next cp are 770 // punctuation. If it's at the end of a punctuation sequence the 771 // current is punctuation and the next is not. 772 return isStart ? isPunctuation(nextCp) : !isPunctuation(nextCp); 773 } 774 return false; 775 } 776 777 private boolean isPunctuation(int cp) { 778 int type = Character.getType(cp); 779 return (type == Character.CONNECTOR_PUNCTUATION || 780 type == Character.DASH_PUNCTUATION || 781 type == Character.END_PUNCTUATION || 782 type == Character.FINAL_QUOTE_PUNCTUATION || 783 type == Character.INITIAL_QUOTE_PUNCTUATION || 784 type == Character.OTHER_PUNCTUATION || 785 type == Character.START_PUNCTUATION); 786 } 787 788 /** 789 * Adjusts selection to the word under last touch offset. Return true if the operation was 790 * successfully performed. 791 */ 792 private boolean selectCurrentWord() { 793 if (!mTextView.canSelectText()) { 794 return false; 795 } 796 797 if (mTextView.hasPasswordTransformationMethod()) { 798 // Always select all on a password field. 799 // Cut/copy menu entries are not available for passwords, but being able to select all 800 // is however useful to delete or paste to replace the entire content. 801 return mTextView.selectAllText(); 802 } 803 804 int inputType = mTextView.getInputType(); 805 int klass = inputType & InputType.TYPE_MASK_CLASS; 806 int variation = inputType & InputType.TYPE_MASK_VARIATION; 807 808 // Specific text field types: select the entire text for these 809 if (klass == InputType.TYPE_CLASS_NUMBER || 810 klass == InputType.TYPE_CLASS_PHONE || 811 klass == InputType.TYPE_CLASS_DATETIME || 812 variation == InputType.TYPE_TEXT_VARIATION_URI || 813 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 814 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 815 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 816 return mTextView.selectAllText(); 817 } 818 819 long lastTouchOffsets = getLastTouchOffsets(); 820 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 821 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 822 823 // Safety check in case standard touch event handling has been bypassed 824 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 825 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 826 827 int selectionStart, selectionEnd; 828 829 // If a URLSpan (web address, email, phone...) is found at that position, select it. 830 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 831 getSpans(minOffset, maxOffset, URLSpan.class); 832 if (urlSpans.length >= 1) { 833 URLSpan urlSpan = urlSpans[0]; 834 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 835 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 836 } else { 837 // FIXME - We should check if there's a LocaleSpan in the text, this may be 838 // something we should try handling or checking for. 839 final WordIterator wordIterator = getWordIterator(); 840 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 841 842 selectionStart = wordIterator.getBeginning(minOffset); 843 selectionEnd = wordIterator.getEnd(maxOffset); 844 845 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 846 selectionStart == selectionEnd) { 847 // Possible when the word iterator does not properly handle the text's language 848 long range = getCharClusterRange(minOffset); 849 selectionStart = TextUtils.unpackRangeStartFromLong(range); 850 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 851 } 852 } 853 854 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 855 return selectionEnd > selectionStart; 856 } 857 858 void onLocaleChanged() { 859 // Will be re-created on demand in getWordIterator with the proper new locale 860 mWordIterator = null; 861 mWordIteratorWithText = null; 862 } 863 864 /** 865 * @hide 866 */ 867 public WordIterator getWordIterator() { 868 if (mWordIterator == null) { 869 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 870 } 871 return mWordIterator; 872 } 873 874 private WordIterator getWordIteratorWithText() { 875 if (mWordIteratorWithText == null) { 876 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 877 mUpdateWordIteratorText = true; 878 } 879 if (mUpdateWordIteratorText) { 880 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 881 // to the user's selection is needed. A possible solution would be to 882 // copy some number N of characters near the selection and then when the 883 // user approaches N then we'd do another copy of the next N characters. 884 CharSequence text = mTextView.getText(); 885 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 886 mUpdateWordIteratorText = false; 887 } 888 return mWordIteratorWithText; 889 } 890 891 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 892 final Layout layout = mTextView.getLayout(); 893 if (layout == null) return offset; 894 final CharSequence text = mTextView.getText(); 895 final int nextOffset = layout.getPaint().getTextRunCursor(text, 0, text.length(), 896 layout.isRtlCharAt(offset) ? Paint.DIRECTION_RTL : Paint.DIRECTION_LTR, 897 offset, findAfterGivenOffset ? Paint.CURSOR_AFTER : Paint.CURSOR_BEFORE); 898 return nextOffset == -1 ? offset : nextOffset; 899 } 900 901 private long getCharClusterRange(int offset) { 902 final int textLength = mTextView.getText().length(); 903 if (offset < textLength) { 904 return TextUtils.packRangeInLong(offset, getNextCursorOffset(offset, true)); 905 } 906 if (offset - 1 >= 0) { 907 return TextUtils.packRangeInLong(getNextCursorOffset(offset, false), offset); 908 } 909 return TextUtils.packRangeInLong(offset, offset); 910 } 911 912 private boolean touchPositionIsInSelection() { 913 int selectionStart = mTextView.getSelectionStart(); 914 int selectionEnd = mTextView.getSelectionEnd(); 915 916 if (selectionStart == selectionEnd) { 917 return false; 918 } 919 920 if (selectionStart > selectionEnd) { 921 int tmp = selectionStart; 922 selectionStart = selectionEnd; 923 selectionEnd = tmp; 924 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 925 } 926 927 SelectionModifierCursorController selectionController = getSelectionController(); 928 int minOffset = selectionController.getMinTouchOffset(); 929 int maxOffset = selectionController.getMaxTouchOffset(); 930 931 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 932 } 933 934 private PositionListener getPositionListener() { 935 if (mPositionListener == null) { 936 mPositionListener = new PositionListener(); 937 } 938 return mPositionListener; 939 } 940 941 private interface TextViewPositionListener { 942 public void updatePosition(int parentPositionX, int parentPositionY, 943 boolean parentPositionChanged, boolean parentScrolled); 944 } 945 946 private boolean isPositionVisible(final float positionX, final float positionY) { 947 synchronized (TEMP_POSITION) { 948 final float[] position = TEMP_POSITION; 949 position[0] = positionX; 950 position[1] = positionY; 951 View view = mTextView; 952 953 while (view != null) { 954 if (view != mTextView) { 955 // Local scroll is already taken into account in positionX/Y 956 position[0] -= view.getScrollX(); 957 position[1] -= view.getScrollY(); 958 } 959 960 if (position[0] < 0 || position[1] < 0 || 961 position[0] > view.getWidth() || position[1] > view.getHeight()) { 962 return false; 963 } 964 965 if (!view.getMatrix().isIdentity()) { 966 view.getMatrix().mapPoints(position); 967 } 968 969 position[0] += view.getLeft(); 970 position[1] += view.getTop(); 971 972 final ViewParent parent = view.getParent(); 973 if (parent instanceof View) { 974 view = (View) parent; 975 } else { 976 // We've reached the ViewRoot, stop iterating 977 view = null; 978 } 979 } 980 } 981 982 // We've been able to walk up the view hierarchy and the position was never clipped 983 return true; 984 } 985 986 private boolean isOffsetVisible(int offset) { 987 Layout layout = mTextView.getLayout(); 988 if (layout == null) return false; 989 990 final int line = layout.getLineForOffset(offset); 991 final int lineBottom = layout.getLineBottom(line); 992 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 993 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 994 lineBottom + mTextView.viewportToContentVerticalOffset()); 995 } 996 997 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 998 * in the view. Returns false when the position is in the empty space of left/right of text. 999 */ 1000 private boolean isPositionOnText(float x, float y) { 1001 Layout layout = mTextView.getLayout(); 1002 if (layout == null) return false; 1003 1004 final int line = mTextView.getLineAtCoordinate(y); 1005 x = mTextView.convertToLocalHorizontalCoordinate(x); 1006 1007 if (x < layout.getLineLeft(line)) return false; 1008 if (x > layout.getLineRight(line)) return false; 1009 return true; 1010 } 1011 1012 public boolean performLongClick(boolean handled) { 1013 // Long press in empty space moves cursor and starts the selection action mode. 1014 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 1015 mInsertionControllerEnabled) { 1016 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1017 mLastDownPositionY); 1018 stopSelectionActionMode(); 1019 Selection.setSelection((Spannable) mTextView.getText(), offset); 1020 getInsertionController().show(); 1021 startSelectionActionModeWithoutSelection(); 1022 handled = true; 1023 } 1024 1025 if (!handled && mSelectionActionMode != null) { 1026 if (touchPositionIsInSelection()) { 1027 // Start a drag 1028 final int start = mTextView.getSelectionStart(); 1029 final int end = mTextView.getSelectionEnd(); 1030 CharSequence selectedText = mTextView.getTransformedText(start, end); 1031 ClipData data = ClipData.newPlainText(null, selectedText); 1032 DragLocalState localState = new DragLocalState(mTextView, start, end); 1033 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 1034 View.DRAG_FLAG_GLOBAL); 1035 stopSelectionActionMode(); 1036 } else { 1037 stopSelectionActionMode(); 1038 startSelectionActionModeWithSelectionAndStartDrag(); 1039 } 1040 handled = true; 1041 } 1042 1043 // Start a new selection 1044 if (!handled) { 1045 handled = startSelectionActionModeWithSelectionAndStartDrag(); 1046 } 1047 1048 return handled; 1049 } 1050 1051 private long getLastTouchOffsets() { 1052 SelectionModifierCursorController selectionController = getSelectionController(); 1053 final int minOffset = selectionController.getMinTouchOffset(); 1054 final int maxOffset = selectionController.getMaxTouchOffset(); 1055 return TextUtils.packRangeInLong(minOffset, maxOffset); 1056 } 1057 1058 void onFocusChanged(boolean focused, int direction) { 1059 mShowCursor = SystemClock.uptimeMillis(); 1060 ensureEndedBatchEdit(); 1061 1062 if (focused) { 1063 int selStart = mTextView.getSelectionStart(); 1064 int selEnd = mTextView.getSelectionEnd(); 1065 1066 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1067 // mode for these, unless there was a specific selection already started. 1068 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1069 selEnd == mTextView.getText().length(); 1070 1071 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1072 !isFocusHighlighted; 1073 1074 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1075 // If a tap was used to give focus to that view, move cursor at tap position. 1076 // Has to be done before onTakeFocus, which can be overloaded. 1077 final int lastTapPosition = getLastTapPosition(); 1078 if (lastTapPosition >= 0) { 1079 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1080 } 1081 1082 // Note this may have to be moved out of the Editor class 1083 MovementMethod mMovement = mTextView.getMovementMethod(); 1084 if (mMovement != null) { 1085 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1086 } 1087 1088 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1089 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1090 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1091 // This special case ensure that we keep current selection in that case. 1092 // It would be better to know why the DecorView does not have focus at that time. 1093 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1094 selStart >= 0 && selEnd >= 0) { 1095 /* 1096 * Someone intentionally set the selection, so let them 1097 * do whatever it is that they wanted to do instead of 1098 * the default on-focus behavior. We reset the selection 1099 * here instead of just skipping the onTakeFocus() call 1100 * because some movement methods do something other than 1101 * just setting the selection in theirs and we still 1102 * need to go through that path. 1103 */ 1104 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1105 } 1106 1107 if (mSelectAllOnFocus) { 1108 mTextView.selectAllText(); 1109 } 1110 1111 mTouchFocusSelected = true; 1112 } 1113 1114 mFrozenWithFocus = false; 1115 mSelectionMoved = false; 1116 1117 if (mError != null) { 1118 showError(); 1119 } 1120 1121 makeBlink(); 1122 } else { 1123 if (mError != null) { 1124 hideError(); 1125 } 1126 // Don't leave us in the middle of a batch edit. 1127 mTextView.onEndBatchEdit(); 1128 1129 if (mTextView instanceof ExtractEditText) { 1130 // terminateTextSelectionMode removes selection, which we want to keep when 1131 // ExtractEditText goes out of focus. 1132 final int selStart = mTextView.getSelectionStart(); 1133 final int selEnd = mTextView.getSelectionEnd(); 1134 hideControllers(); 1135 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1136 } else { 1137 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1138 hideControllers(); 1139 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1140 downgradeEasyCorrectionSpans(); 1141 } 1142 1143 // No need to create the controller 1144 if (mSelectionModifierCursorController != null) { 1145 mSelectionModifierCursorController.resetTouchOffsets(); 1146 } 1147 } 1148 } 1149 1150 /** 1151 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1152 * span. 1153 */ 1154 private void downgradeEasyCorrectionSpans() { 1155 CharSequence text = mTextView.getText(); 1156 if (text instanceof Spannable) { 1157 Spannable spannable = (Spannable) text; 1158 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1159 spannable.length(), SuggestionSpan.class); 1160 for (int i = 0; i < suggestionSpans.length; i++) { 1161 int flags = suggestionSpans[i].getFlags(); 1162 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1163 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1164 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1165 suggestionSpans[i].setFlags(flags); 1166 } 1167 } 1168 } 1169 } 1170 1171 void sendOnTextChanged(int start, int after) { 1172 updateSpellCheckSpans(start, start + after, false); 1173 1174 // Flip flag to indicate the word iterator needs to have the text reset. 1175 mUpdateWordIteratorText = true; 1176 1177 // Hide the controllers as soon as text is modified (typing, procedural...) 1178 // We do not hide the span controllers, since they can be added when a new text is 1179 // inserted into the text view (voice IME). 1180 hideCursorControllers(); 1181 } 1182 1183 private int getLastTapPosition() { 1184 // No need to create the controller at that point, no last tap position saved 1185 if (mSelectionModifierCursorController != null) { 1186 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1187 if (lastTapPosition >= 0) { 1188 // Safety check, should not be possible. 1189 if (lastTapPosition > mTextView.getText().length()) { 1190 lastTapPosition = mTextView.getText().length(); 1191 } 1192 return lastTapPosition; 1193 } 1194 } 1195 1196 return -1; 1197 } 1198 1199 void onWindowFocusChanged(boolean hasWindowFocus) { 1200 if (hasWindowFocus) { 1201 if (mBlink != null) { 1202 mBlink.uncancel(); 1203 makeBlink(); 1204 } 1205 } else { 1206 if (mBlink != null) { 1207 mBlink.cancel(); 1208 } 1209 if (mInputContentType != null) { 1210 mInputContentType.enterDown = false; 1211 } 1212 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1213 hideControllers(); 1214 if (mSuggestionsPopupWindow != null) { 1215 mSuggestionsPopupWindow.onParentLostFocus(); 1216 } 1217 1218 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1219 ensureEndedBatchEdit(); 1220 } 1221 } 1222 1223 void onTouchEvent(MotionEvent event) { 1224 if (hasSelectionController()) { 1225 getSelectionController().onTouchEvent(event); 1226 } 1227 1228 if (mShowSuggestionRunnable != null) { 1229 mTextView.removeCallbacks(mShowSuggestionRunnable); 1230 mShowSuggestionRunnable = null; 1231 } 1232 1233 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1234 mLastDownPositionX = event.getX(); 1235 mLastDownPositionY = event.getY(); 1236 1237 // Reset this state; it will be re-set if super.onTouchEvent 1238 // causes focus to move to the view. 1239 mTouchFocusSelected = false; 1240 mIgnoreActionUpEvent = false; 1241 } 1242 } 1243 1244 public void beginBatchEdit() { 1245 mInBatchEditControllers = true; 1246 final InputMethodState ims = mInputMethodState; 1247 if (ims != null) { 1248 int nesting = ++ims.mBatchEditNesting; 1249 if (nesting == 1) { 1250 ims.mCursorChanged = false; 1251 ims.mChangedDelta = 0; 1252 if (ims.mContentChanged) { 1253 // We already have a pending change from somewhere else, 1254 // so turn this into a full update. 1255 ims.mChangedStart = 0; 1256 ims.mChangedEnd = mTextView.getText().length(); 1257 } else { 1258 ims.mChangedStart = EXTRACT_UNKNOWN; 1259 ims.mChangedEnd = EXTRACT_UNKNOWN; 1260 ims.mContentChanged = false; 1261 } 1262 mUndoInputFilter.beginBatchEdit(); 1263 mTextView.onBeginBatchEdit(); 1264 } 1265 } 1266 } 1267 1268 public void endBatchEdit() { 1269 mInBatchEditControllers = false; 1270 final InputMethodState ims = mInputMethodState; 1271 if (ims != null) { 1272 int nesting = --ims.mBatchEditNesting; 1273 if (nesting == 0) { 1274 finishBatchEdit(ims); 1275 } 1276 } 1277 } 1278 1279 void ensureEndedBatchEdit() { 1280 final InputMethodState ims = mInputMethodState; 1281 if (ims != null && ims.mBatchEditNesting != 0) { 1282 ims.mBatchEditNesting = 0; 1283 finishBatchEdit(ims); 1284 } 1285 } 1286 1287 void finishBatchEdit(final InputMethodState ims) { 1288 mTextView.onEndBatchEdit(); 1289 mUndoInputFilter.endBatchEdit(); 1290 1291 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1292 mTextView.updateAfterEdit(); 1293 reportExtractedText(); 1294 } else if (ims.mCursorChanged) { 1295 // Cheesy way to get us to report the current cursor location. 1296 mTextView.invalidateCursor(); 1297 } 1298 // sendUpdateSelection knows to avoid sending if the selection did 1299 // not actually change. 1300 sendUpdateSelection(); 1301 } 1302 1303 static final int EXTRACT_NOTHING = -2; 1304 static final int EXTRACT_UNKNOWN = -1; 1305 1306 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1307 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1308 EXTRACT_UNKNOWN, outText); 1309 } 1310 1311 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1312 int partialStartOffset, int partialEndOffset, int delta, 1313 @Nullable ExtractedText outText) { 1314 if (request == null || outText == null) { 1315 return false; 1316 } 1317 1318 final CharSequence content = mTextView.getText(); 1319 if (content == null) { 1320 return false; 1321 } 1322 1323 if (partialStartOffset != EXTRACT_NOTHING) { 1324 final int N = content.length(); 1325 if (partialStartOffset < 0) { 1326 outText.partialStartOffset = outText.partialEndOffset = -1; 1327 partialStartOffset = 0; 1328 partialEndOffset = N; 1329 } else { 1330 // Now use the delta to determine the actual amount of text 1331 // we need. 1332 partialEndOffset += delta; 1333 // Adjust offsets to ensure we contain full spans. 1334 if (content instanceof Spanned) { 1335 Spanned spanned = (Spanned)content; 1336 Object[] spans = spanned.getSpans(partialStartOffset, 1337 partialEndOffset, ParcelableSpan.class); 1338 int i = spans.length; 1339 while (i > 0) { 1340 i--; 1341 int j = spanned.getSpanStart(spans[i]); 1342 if (j < partialStartOffset) partialStartOffset = j; 1343 j = spanned.getSpanEnd(spans[i]); 1344 if (j > partialEndOffset) partialEndOffset = j; 1345 } 1346 } 1347 outText.partialStartOffset = partialStartOffset; 1348 outText.partialEndOffset = partialEndOffset - delta; 1349 1350 if (partialStartOffset > N) { 1351 partialStartOffset = N; 1352 } else if (partialStartOffset < 0) { 1353 partialStartOffset = 0; 1354 } 1355 if (partialEndOffset > N) { 1356 partialEndOffset = N; 1357 } else if (partialEndOffset < 0) { 1358 partialEndOffset = 0; 1359 } 1360 } 1361 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1362 outText.text = content.subSequence(partialStartOffset, 1363 partialEndOffset); 1364 } else { 1365 outText.text = TextUtils.substring(content, partialStartOffset, 1366 partialEndOffset); 1367 } 1368 } else { 1369 outText.partialStartOffset = 0; 1370 outText.partialEndOffset = 0; 1371 outText.text = ""; 1372 } 1373 outText.flags = 0; 1374 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1375 outText.flags |= ExtractedText.FLAG_SELECTING; 1376 } 1377 if (mTextView.isSingleLine()) { 1378 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1379 } 1380 outText.startOffset = 0; 1381 outText.selectionStart = mTextView.getSelectionStart(); 1382 outText.selectionEnd = mTextView.getSelectionEnd(); 1383 return true; 1384 } 1385 1386 boolean reportExtractedText() { 1387 final Editor.InputMethodState ims = mInputMethodState; 1388 if (ims != null) { 1389 final boolean contentChanged = ims.mContentChanged; 1390 if (contentChanged || ims.mSelectionModeChanged) { 1391 ims.mContentChanged = false; 1392 ims.mSelectionModeChanged = false; 1393 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1394 if (req != null) { 1395 InputMethodManager imm = InputMethodManager.peekInstance(); 1396 if (imm != null) { 1397 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1398 "Retrieving extracted start=" + ims.mChangedStart + 1399 " end=" + ims.mChangedEnd + 1400 " delta=" + ims.mChangedDelta); 1401 if (ims.mChangedStart < 0 && !contentChanged) { 1402 ims.mChangedStart = EXTRACT_NOTHING; 1403 } 1404 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1405 ims.mChangedDelta, ims.mExtractedText)) { 1406 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1407 "Reporting extracted start=" + 1408 ims.mExtractedText.partialStartOffset + 1409 " end=" + ims.mExtractedText.partialEndOffset + 1410 ": " + ims.mExtractedText.text); 1411 1412 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1413 ims.mChangedStart = EXTRACT_UNKNOWN; 1414 ims.mChangedEnd = EXTRACT_UNKNOWN; 1415 ims.mChangedDelta = 0; 1416 ims.mContentChanged = false; 1417 return true; 1418 } 1419 } 1420 } 1421 } 1422 } 1423 return false; 1424 } 1425 1426 private void sendUpdateSelection() { 1427 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1428 final InputMethodManager imm = InputMethodManager.peekInstance(); 1429 if (null != imm) { 1430 final int selectionStart = mTextView.getSelectionStart(); 1431 final int selectionEnd = mTextView.getSelectionEnd(); 1432 int candStart = -1; 1433 int candEnd = -1; 1434 if (mTextView.getText() instanceof Spannable) { 1435 final Spannable sp = (Spannable) mTextView.getText(); 1436 candStart = EditableInputConnection.getComposingSpanStart(sp); 1437 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1438 } 1439 // InputMethodManager#updateSelection skips sending the message if 1440 // none of the parameters have changed since the last time we called it. 1441 imm.updateSelection(mTextView, 1442 selectionStart, selectionEnd, candStart, candEnd); 1443 } 1444 } 1445 } 1446 1447 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1448 int cursorOffsetVertical) { 1449 final int selectionStart = mTextView.getSelectionStart(); 1450 final int selectionEnd = mTextView.getSelectionEnd(); 1451 1452 final InputMethodState ims = mInputMethodState; 1453 if (ims != null && ims.mBatchEditNesting == 0) { 1454 InputMethodManager imm = InputMethodManager.peekInstance(); 1455 if (imm != null) { 1456 if (imm.isActive(mTextView)) { 1457 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1458 // We are in extract mode and the content has changed 1459 // in some way... just report complete new text to the 1460 // input method. 1461 reportExtractedText(); 1462 } 1463 } 1464 } 1465 } 1466 1467 if (mCorrectionHighlighter != null) { 1468 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1469 } 1470 1471 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1472 drawCursor(canvas, cursorOffsetVertical); 1473 // Rely on the drawable entirely, do not draw the cursor line. 1474 // Has to be done after the IMM related code above which relies on the highlight. 1475 highlight = null; 1476 } 1477 1478 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1479 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1480 cursorOffsetVertical); 1481 } else { 1482 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1483 } 1484 } 1485 1486 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1487 Paint highlightPaint, int cursorOffsetVertical) { 1488 final long lineRange = layout.getLineRangeForDraw(canvas); 1489 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1490 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1491 if (lastLine < 0) return; 1492 1493 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1494 firstLine, lastLine); 1495 1496 if (layout instanceof DynamicLayout) { 1497 if (mTextRenderNodes == null) { 1498 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1499 } 1500 1501 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1502 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1503 int[] blockIndices = dynamicLayout.getBlockIndices(); 1504 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1505 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1506 1507 int endOfPreviousBlock = -1; 1508 int searchStartIndex = 0; 1509 for (int i = 0; i < numberOfBlocks; i++) { 1510 int blockEndLine = blockEndLines[i]; 1511 int blockIndex = blockIndices[i]; 1512 1513 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1514 if (blockIsInvalid) { 1515 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1516 searchStartIndex); 1517 // Note how dynamic layout's internal block indices get updated from Editor 1518 blockIndices[i] = blockIndex; 1519 if (mTextRenderNodes[blockIndex] != null) { 1520 mTextRenderNodes[blockIndex].isDirty = true; 1521 } 1522 searchStartIndex = blockIndex + 1; 1523 } 1524 1525 if (mTextRenderNodes[blockIndex] == null) { 1526 mTextRenderNodes[blockIndex] = 1527 new TextRenderNode("Text " + blockIndex); 1528 } 1529 1530 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1531 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1532 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1533 final int blockBeginLine = endOfPreviousBlock + 1; 1534 final int top = layout.getLineTop(blockBeginLine); 1535 final int bottom = layout.getLineBottom(blockEndLine); 1536 int left = 0; 1537 int right = mTextView.getWidth(); 1538 if (mTextView.getHorizontallyScrolling()) { 1539 float min = Float.MAX_VALUE; 1540 float max = Float.MIN_VALUE; 1541 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1542 min = Math.min(min, layout.getLineLeft(line)); 1543 max = Math.max(max, layout.getLineRight(line)); 1544 } 1545 left = (int) min; 1546 right = (int) (max + 0.5f); 1547 } 1548 1549 // Rebuild display list if it is invalid 1550 if (blockDisplayListIsInvalid) { 1551 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1552 right - left, bottom - top); 1553 try { 1554 // drawText is always relative to TextView's origin, this translation 1555 // brings this range of text back to the top left corner of the viewport 1556 displayListCanvas.translate(-left, -top); 1557 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1558 mTextRenderNodes[blockIndex].isDirty = false; 1559 // No need to untranslate, previous context is popped after 1560 // drawDisplayList 1561 } finally { 1562 blockDisplayList.end(displayListCanvas); 1563 // Same as drawDisplayList below, handled by our TextView's parent 1564 blockDisplayList.setClipToBounds(false); 1565 } 1566 } 1567 1568 // Valid disply list whose index is >= indexFirstChangedBlock 1569 // only needs to update its drawing location. 1570 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1571 } 1572 1573 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1574 1575 endOfPreviousBlock = blockEndLine; 1576 } 1577 1578 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1579 } else { 1580 // Boring layout is used for empty and hint text 1581 layout.drawText(canvas, firstLine, lastLine); 1582 } 1583 } 1584 1585 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1586 int searchStartIndex) { 1587 int length = mTextRenderNodes.length; 1588 for (int i = searchStartIndex; i < length; i++) { 1589 boolean blockIndexFound = false; 1590 for (int j = 0; j < numberOfBlocks; j++) { 1591 if (blockIndices[j] == i) { 1592 blockIndexFound = true; 1593 break; 1594 } 1595 } 1596 if (blockIndexFound) continue; 1597 return i; 1598 } 1599 1600 // No available index found, the pool has to grow 1601 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1602 return length; 1603 } 1604 1605 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1606 final boolean translate = cursorOffsetVertical != 0; 1607 if (translate) canvas.translate(0, cursorOffsetVertical); 1608 for (int i = 0; i < mCursorCount; i++) { 1609 mCursorDrawable[i].draw(canvas); 1610 } 1611 if (translate) canvas.translate(0, -cursorOffsetVertical); 1612 } 1613 1614 /** 1615 * Invalidates all the sub-display lists that overlap the specified character range 1616 */ 1617 void invalidateTextDisplayList(Layout layout, int start, int end) { 1618 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1619 final int firstLine = layout.getLineForOffset(start); 1620 final int lastLine = layout.getLineForOffset(end); 1621 1622 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1623 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1624 int[] blockIndices = dynamicLayout.getBlockIndices(); 1625 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1626 1627 int i = 0; 1628 // Skip the blocks before firstLine 1629 while (i < numberOfBlocks) { 1630 if (blockEndLines[i] >= firstLine) break; 1631 i++; 1632 } 1633 1634 // Invalidate all subsequent blocks until lastLine is passed 1635 while (i < numberOfBlocks) { 1636 final int blockIndex = blockIndices[i]; 1637 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1638 mTextRenderNodes[blockIndex].isDirty = true; 1639 } 1640 if (blockEndLines[i] >= lastLine) break; 1641 i++; 1642 } 1643 } 1644 } 1645 1646 void invalidateTextDisplayList() { 1647 if (mTextRenderNodes != null) { 1648 for (int i = 0; i < mTextRenderNodes.length; i++) { 1649 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1650 } 1651 } 1652 } 1653 1654 void updateCursorsPositions() { 1655 if (mTextView.mCursorDrawableRes == 0) { 1656 mCursorCount = 0; 1657 return; 1658 } 1659 1660 Layout layout = mTextView.getLayout(); 1661 Layout hintLayout = mTextView.getHintLayout(); 1662 final int offset = mTextView.getSelectionStart(); 1663 final int line = layout.getLineForOffset(offset); 1664 final int top = layout.getLineTop(line); 1665 final int bottom = layout.getLineTop(line + 1); 1666 1667 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1668 1669 int middle = bottom; 1670 if (mCursorCount == 2) { 1671 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1672 middle = (top + bottom) >> 1; 1673 } 1674 1675 boolean clamped = layout.shouldClampCursor(line); 1676 updateCursorPosition(0, top, middle, 1677 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1678 1679 if (mCursorCount == 2) { 1680 updateCursorPosition(1, middle, bottom, 1681 layout.getSecondaryHorizontal(offset, clamped)); 1682 } 1683 } 1684 1685 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1686 boolean clamped) { 1687 if (TextUtils.isEmpty(layout.getText()) && 1688 hintLayout != null && 1689 !TextUtils.isEmpty(hintLayout.getText())) { 1690 return hintLayout.getPrimaryHorizontal(offset, clamped); 1691 } else { 1692 return layout.getPrimaryHorizontal(offset, clamped); 1693 } 1694 } 1695 1696 /** 1697 * @return true if the selection mode was actually started. 1698 */ 1699 private boolean startSelectionActionModeWithoutSelection() { 1700 if (mSelectionActionMode != null) { 1701 // Selection action mode is already started 1702 // TODO: revisit invocations to minimize this case. 1703 mSelectionActionMode.invalidate(); 1704 return false; 1705 } 1706 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1707 mSelectionActionMode = mTextView.startActionMode( 1708 actionModeCallback, ActionMode.TYPE_FLOATING); 1709 return mSelectionActionMode != null; 1710 } 1711 1712 /** 1713 * Starts a Selection Action Mode with the current selection and enters drag mode. This should 1714 * be used whenever the mode is started from a touch event. 1715 * 1716 * @return true if the selection mode was actually started. 1717 */ 1718 private boolean startSelectionActionModeWithSelectionAndStartDrag() { 1719 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1720 if (selectionStarted) { 1721 getSelectionController().enterDrag(); 1722 } 1723 return selectionStarted; 1724 } 1725 1726 /** 1727 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1728 * are shown. This should be used when the mode is started from a non-touch event. 1729 * 1730 * @return true if the selection mode was actually started. 1731 */ 1732 boolean startSelectionActionModeWithSelection() { 1733 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1734 if (selectionStarted) { 1735 getSelectionController().show(); 1736 } 1737 return selectionStarted; 1738 } 1739 1740 private boolean startSelectionActionModeWithSelectionInternal() { 1741 if (mSelectionActionMode != null) { 1742 // Selection action mode is already started 1743 mSelectionActionMode.invalidate(); 1744 return false; 1745 } 1746 1747 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1748 Log.w(TextView.LOG_TAG, 1749 "TextView does not support text selection. Action mode cancelled."); 1750 return false; 1751 } 1752 1753 if (!mTextView.hasSelection()) { 1754 // There may already be a selection on device rotation 1755 if (!selectCurrentWord()) { 1756 // No word found under cursor or text selection not permitted. 1757 return false; 1758 } 1759 } 1760 1761 boolean willExtract = extractedTextModeWillBeStarted(); 1762 1763 // Do not start the action mode when extracted text will show up full screen, which would 1764 // immediately hide the newly created action bar and would be visually distracting. 1765 if (!willExtract) { 1766 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1767 mSelectionActionMode = mTextView.startActionMode( 1768 actionModeCallback, ActionMode.TYPE_FLOATING); 1769 } 1770 1771 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1772 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1773 // Show the IME to be able to replace text, except when selecting non editable text. 1774 final InputMethodManager imm = InputMethodManager.peekInstance(); 1775 if (imm != null) { 1776 imm.showSoftInput(mTextView, 0, null); 1777 } 1778 } 1779 return selectionStarted; 1780 } 1781 1782 private boolean extractedTextModeWillBeStarted() { 1783 if (!(mTextView instanceof ExtractEditText)) { 1784 final InputMethodManager imm = InputMethodManager.peekInstance(); 1785 return imm != null && imm.isFullscreenMode(); 1786 } 1787 return false; 1788 } 1789 1790 /** 1791 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1792 * the current cursor position or selection range. This method is consistent with the 1793 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1794 */ 1795 private boolean shouldOfferToShowSuggestions() { 1796 CharSequence text = mTextView.getText(); 1797 if (!(text instanceof Spannable)) return false; 1798 1799 final Spannable spannable = (Spannable) text; 1800 final int selectionStart = mTextView.getSelectionStart(); 1801 final int selectionEnd = mTextView.getSelectionEnd(); 1802 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1803 SuggestionSpan.class); 1804 if (suggestionSpans.length == 0) { 1805 return false; 1806 } 1807 if (selectionStart == selectionEnd) { 1808 // Spans overlap the cursor. 1809 return true; 1810 } 1811 int minSpanStart = mTextView.getText().length(); 1812 int maxSpanEnd = 0; 1813 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1814 int unionOfSpansCoveringSelectionStartEnd = 0; 1815 for (int i = 0; i < suggestionSpans.length; i++) { 1816 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1817 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1818 minSpanStart = Math.min(minSpanStart, spanStart); 1819 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1820 if (selectionStart < spanStart || selectionStart > spanEnd) { 1821 // The span doesn't cover the current selection start point. 1822 continue; 1823 } 1824 unionOfSpansCoveringSelectionStartStart = 1825 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1826 unionOfSpansCoveringSelectionStartEnd = 1827 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1828 } 1829 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1830 // No spans cover the selection start point. 1831 return false; 1832 } 1833 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1834 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1835 // There is a span that is not covered by the union. In this case, we soouldn't offer 1836 // to show suggestions as it's confusing. 1837 return false; 1838 } 1839 return true; 1840 } 1841 1842 /** 1843 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1844 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1845 */ 1846 private boolean isCursorInsideEasyCorrectionSpan() { 1847 Spannable spannable = (Spannable) mTextView.getText(); 1848 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1849 mTextView.getSelectionEnd(), SuggestionSpan.class); 1850 for (int i = 0; i < suggestionSpans.length; i++) { 1851 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1852 return true; 1853 } 1854 } 1855 return false; 1856 } 1857 1858 void onTouchUpEvent(MotionEvent event) { 1859 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1860 hideControllers(); 1861 CharSequence text = mTextView.getText(); 1862 if (!selectAllGotFocus && text.length() > 0) { 1863 // Move cursor 1864 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1865 Selection.setSelection((Spannable) text, offset); 1866 if (mSpellChecker != null) { 1867 // When the cursor moves, the word that was typed may need spell check 1868 mSpellChecker.onSelectionChanged(); 1869 } 1870 if (!extractedTextModeWillBeStarted()) { 1871 if (isCursorInsideEasyCorrectionSpan()) { 1872 mShowSuggestionRunnable = new Runnable() { 1873 public void run() { 1874 showSuggestions(); 1875 } 1876 }; 1877 // removeCallbacks is performed on every touch 1878 mTextView.postDelayed(mShowSuggestionRunnable, 1879 ViewConfiguration.getDoubleTapTimeout()); 1880 } else if (hasInsertionController()) { 1881 getInsertionController().show(); 1882 } 1883 } 1884 } 1885 } 1886 1887 protected void stopSelectionActionMode() { 1888 if (mSelectionActionMode != null) { 1889 // This will hide the mSelectionModifierCursorController 1890 mSelectionActionMode.finish(); 1891 } 1892 } 1893 1894 /** 1895 * @return True if this view supports insertion handles. 1896 */ 1897 boolean hasInsertionController() { 1898 return mInsertionControllerEnabled; 1899 } 1900 1901 /** 1902 * @return True if this view supports selection handles. 1903 */ 1904 boolean hasSelectionController() { 1905 return mSelectionControllerEnabled; 1906 } 1907 1908 InsertionPointCursorController getInsertionController() { 1909 if (!mInsertionControllerEnabled) { 1910 return null; 1911 } 1912 1913 if (mInsertionPointCursorController == null) { 1914 mInsertionPointCursorController = new InsertionPointCursorController(); 1915 1916 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1917 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1918 } 1919 1920 return mInsertionPointCursorController; 1921 } 1922 1923 SelectionModifierCursorController getSelectionController() { 1924 if (!mSelectionControllerEnabled) { 1925 return null; 1926 } 1927 1928 if (mSelectionModifierCursorController == null) { 1929 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1930 1931 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1932 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1933 } 1934 1935 return mSelectionModifierCursorController; 1936 } 1937 1938 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1939 if (mCursorDrawable[cursorIndex] == null) 1940 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1941 mTextView.mCursorDrawableRes); 1942 1943 if (mTempRect == null) mTempRect = new Rect(); 1944 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1945 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1946 horizontal = Math.max(0.5f, horizontal - 0.5f); 1947 final int left = (int) (horizontal) - mTempRect.left; 1948 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1949 bottom + mTempRect.bottom); 1950 } 1951 1952 /** 1953 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1954 * a dictionary) from the current input method, provided by it calling 1955 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1956 * implementation flashes the background of the corrected word to provide feedback to the user. 1957 * 1958 * @param info The auto correct info about the text that was corrected. 1959 */ 1960 public void onCommitCorrection(CorrectionInfo info) { 1961 if (mCorrectionHighlighter == null) { 1962 mCorrectionHighlighter = new CorrectionHighlighter(); 1963 } else { 1964 mCorrectionHighlighter.invalidate(false); 1965 } 1966 1967 mCorrectionHighlighter.highlight(info); 1968 } 1969 1970 void showSuggestions() { 1971 if (mSuggestionsPopupWindow == null) { 1972 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1973 } 1974 hideControllers(); 1975 mSuggestionsPopupWindow.show(); 1976 } 1977 1978 void onScrollChanged() { 1979 if (mPositionListener != null) { 1980 mPositionListener.onScrollChanged(); 1981 } 1982 if (mSelectionActionMode != null) { 1983 mSelectionActionMode.invalidateContentRect(); 1984 } 1985 } 1986 1987 /** 1988 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1989 */ 1990 private boolean shouldBlink() { 1991 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1992 1993 final int start = mTextView.getSelectionStart(); 1994 if (start < 0) return false; 1995 1996 final int end = mTextView.getSelectionEnd(); 1997 if (end < 0) return false; 1998 1999 return start == end; 2000 } 2001 2002 void makeBlink() { 2003 if (shouldBlink()) { 2004 mShowCursor = SystemClock.uptimeMillis(); 2005 if (mBlink == null) mBlink = new Blink(); 2006 mBlink.removeCallbacks(mBlink); 2007 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 2008 } else { 2009 if (mBlink != null) mBlink.removeCallbacks(mBlink); 2010 } 2011 } 2012 2013 private class Blink extends Handler implements Runnable { 2014 private boolean mCancelled; 2015 2016 public void run() { 2017 if (mCancelled) { 2018 return; 2019 } 2020 2021 removeCallbacks(Blink.this); 2022 2023 if (shouldBlink()) { 2024 if (mTextView.getLayout() != null) { 2025 mTextView.invalidateCursorPath(); 2026 } 2027 2028 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 2029 } 2030 } 2031 2032 void cancel() { 2033 if (!mCancelled) { 2034 removeCallbacks(Blink.this); 2035 mCancelled = true; 2036 } 2037 } 2038 2039 void uncancel() { 2040 mCancelled = false; 2041 } 2042 } 2043 2044 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 2045 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2046 com.android.internal.R.layout.text_drag_thumbnail, null); 2047 2048 if (shadowView == null) { 2049 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2050 } 2051 2052 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2053 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2054 } 2055 shadowView.setText(text); 2056 shadowView.setTextColor(mTextView.getTextColors()); 2057 2058 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2059 shadowView.setGravity(Gravity.CENTER); 2060 2061 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2062 ViewGroup.LayoutParams.WRAP_CONTENT)); 2063 2064 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2065 shadowView.measure(size, size); 2066 2067 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2068 shadowView.invalidate(); 2069 return new DragShadowBuilder(shadowView); 2070 } 2071 2072 private static class DragLocalState { 2073 public TextView sourceTextView; 2074 public int start, end; 2075 2076 public DragLocalState(TextView sourceTextView, int start, int end) { 2077 this.sourceTextView = sourceTextView; 2078 this.start = start; 2079 this.end = end; 2080 } 2081 } 2082 2083 void onDrop(DragEvent event) { 2084 StringBuilder content = new StringBuilder(""); 2085 ClipData clipData = event.getClipData(); 2086 final int itemCount = clipData.getItemCount(); 2087 for (int i=0; i < itemCount; i++) { 2088 Item item = clipData.getItemAt(i); 2089 content.append(item.coerceToStyledText(mTextView.getContext())); 2090 } 2091 2092 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2093 2094 Object localState = event.getLocalState(); 2095 DragLocalState dragLocalState = null; 2096 if (localState instanceof DragLocalState) { 2097 dragLocalState = (DragLocalState) localState; 2098 } 2099 boolean dragDropIntoItself = dragLocalState != null && 2100 dragLocalState.sourceTextView == mTextView; 2101 2102 if (dragDropIntoItself) { 2103 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2104 // A drop inside the original selection discards the drop. 2105 return; 2106 } 2107 } 2108 2109 final int originalLength = mTextView.getText().length(); 2110 int min = offset; 2111 int max = offset; 2112 2113 Selection.setSelection((Spannable) mTextView.getText(), max); 2114 mTextView.replaceText_internal(min, max, content); 2115 2116 if (dragDropIntoItself) { 2117 int dragSourceStart = dragLocalState.start; 2118 int dragSourceEnd = dragLocalState.end; 2119 if (max <= dragSourceStart) { 2120 // Inserting text before selection has shifted positions 2121 final int shift = mTextView.getText().length() - originalLength; 2122 dragSourceStart += shift; 2123 dragSourceEnd += shift; 2124 } 2125 2126 // Delete original selection 2127 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2128 2129 // Make sure we do not leave two adjacent spaces. 2130 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2131 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2132 if (nextCharIdx > prevCharIdx + 1) { 2133 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2134 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2135 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2136 } 2137 } 2138 } 2139 } 2140 2141 public void addSpanWatchers(Spannable text) { 2142 final int textLength = text.length(); 2143 2144 if (mKeyListener != null) { 2145 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2146 } 2147 2148 if (mSpanController == null) { 2149 mSpanController = new SpanController(); 2150 } 2151 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2152 } 2153 2154 /** 2155 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2156 * pop-up should be displayed. 2157 * Also monitors {@link Selection} to call back to the attached input method. 2158 */ 2159 class SpanController implements SpanWatcher { 2160 2161 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2162 2163 private EasyEditPopupWindow mPopupWindow; 2164 2165 private Runnable mHidePopup; 2166 2167 // This function is pure but inner classes can't have static functions 2168 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2169 final Object span) { 2170 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2171 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2172 } 2173 2174 @Override 2175 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2176 if (isNonIntermediateSelectionSpan(text, span)) { 2177 sendUpdateSelection(); 2178 } else if (span instanceof EasyEditSpan) { 2179 if (mPopupWindow == null) { 2180 mPopupWindow = new EasyEditPopupWindow(); 2181 mHidePopup = new Runnable() { 2182 @Override 2183 public void run() { 2184 hide(); 2185 } 2186 }; 2187 } 2188 2189 // Make sure there is only at most one EasyEditSpan in the text 2190 if (mPopupWindow.mEasyEditSpan != null) { 2191 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2192 } 2193 2194 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2195 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2196 @Override 2197 public void onDeleteClick(EasyEditSpan span) { 2198 Editable editable = (Editable) mTextView.getText(); 2199 int start = editable.getSpanStart(span); 2200 int end = editable.getSpanEnd(span); 2201 if (start >= 0 && end >= 0) { 2202 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2203 mTextView.deleteText_internal(start, end); 2204 } 2205 editable.removeSpan(span); 2206 } 2207 }); 2208 2209 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2210 // The window is not visible yet, ignore the text change. 2211 return; 2212 } 2213 2214 if (mTextView.getLayout() == null) { 2215 // The view has not been laid out yet, ignore the text change 2216 return; 2217 } 2218 2219 if (extractedTextModeWillBeStarted()) { 2220 // The input is in extract mode. Do not handle the easy edit in 2221 // the original TextView, as the ExtractEditText will do 2222 return; 2223 } 2224 2225 mPopupWindow.show(); 2226 mTextView.removeCallbacks(mHidePopup); 2227 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2228 } 2229 } 2230 2231 @Override 2232 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2233 if (isNonIntermediateSelectionSpan(text, span)) { 2234 sendUpdateSelection(); 2235 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2236 hide(); 2237 } 2238 } 2239 2240 @Override 2241 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2242 int newStart, int newEnd) { 2243 if (isNonIntermediateSelectionSpan(text, span)) { 2244 sendUpdateSelection(); 2245 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2246 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2247 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2248 text.removeSpan(easyEditSpan); 2249 } 2250 } 2251 2252 public void hide() { 2253 if (mPopupWindow != null) { 2254 mPopupWindow.hide(); 2255 mTextView.removeCallbacks(mHidePopup); 2256 } 2257 } 2258 2259 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2260 try { 2261 PendingIntent pendingIntent = span.getPendingIntent(); 2262 if (pendingIntent != null) { 2263 Intent intent = new Intent(); 2264 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2265 pendingIntent.send(mTextView.getContext(), 0, intent); 2266 } 2267 } catch (CanceledException e) { 2268 // This should not happen, as we should try to send the intent only once. 2269 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2270 } 2271 } 2272 } 2273 2274 /** 2275 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2276 */ 2277 private interface EasyEditDeleteListener { 2278 2279 /** 2280 * Clicks the delete pop-up. 2281 */ 2282 void onDeleteClick(EasyEditSpan span); 2283 } 2284 2285 /** 2286 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2287 * by {@link SpanController}. 2288 */ 2289 private class EasyEditPopupWindow extends PinnedPopupWindow 2290 implements OnClickListener { 2291 private static final int POPUP_TEXT_LAYOUT = 2292 com.android.internal.R.layout.text_edit_action_popup_text; 2293 private TextView mDeleteTextView; 2294 private EasyEditSpan mEasyEditSpan; 2295 private EasyEditDeleteListener mOnDeleteListener; 2296 2297 @Override 2298 protected void createPopupWindow() { 2299 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2300 com.android.internal.R.attr.textSelectHandleWindowStyle); 2301 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2302 mPopupWindow.setClippingEnabled(true); 2303 } 2304 2305 @Override 2306 protected void initContentView() { 2307 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2308 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2309 mContentView = linearLayout; 2310 mContentView.setBackgroundResource( 2311 com.android.internal.R.drawable.text_edit_side_paste_window); 2312 2313 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2314 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2315 2316 LayoutParams wrapContent = new LayoutParams( 2317 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2318 2319 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2320 mDeleteTextView.setLayoutParams(wrapContent); 2321 mDeleteTextView.setText(com.android.internal.R.string.delete); 2322 mDeleteTextView.setOnClickListener(this); 2323 mContentView.addView(mDeleteTextView); 2324 } 2325 2326 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2327 mEasyEditSpan = easyEditSpan; 2328 } 2329 2330 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2331 mOnDeleteListener = listener; 2332 } 2333 2334 @Override 2335 public void onClick(View view) { 2336 if (view == mDeleteTextView 2337 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2338 && mOnDeleteListener != null) { 2339 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2340 } 2341 } 2342 2343 @Override 2344 public void hide() { 2345 if (mEasyEditSpan != null) { 2346 mEasyEditSpan.setDeleteEnabled(false); 2347 } 2348 mOnDeleteListener = null; 2349 super.hide(); 2350 } 2351 2352 @Override 2353 protected int getTextOffset() { 2354 // Place the pop-up at the end of the span 2355 Editable editable = (Editable) mTextView.getText(); 2356 return editable.getSpanEnd(mEasyEditSpan); 2357 } 2358 2359 @Override 2360 protected int getVerticalLocalPosition(int line) { 2361 return mTextView.getLayout().getLineBottom(line); 2362 } 2363 2364 @Override 2365 protected int clipVertically(int positionY) { 2366 // As we display the pop-up below the span, no vertical clipping is required. 2367 return positionY; 2368 } 2369 } 2370 2371 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2372 // 3 handles 2373 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2374 // 1 CursorAnchorInfoNotifier 2375 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2376 private TextViewPositionListener[] mPositionListeners = 2377 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2378 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2379 private boolean mPositionHasChanged = true; 2380 // Absolute position of the TextView with respect to its parent window 2381 private int mPositionX, mPositionY; 2382 private int mNumberOfListeners; 2383 private boolean mScrollHasChanged; 2384 final int[] mTempCoords = new int[2]; 2385 2386 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2387 if (mNumberOfListeners == 0) { 2388 updatePosition(); 2389 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2390 vto.addOnPreDrawListener(this); 2391 } 2392 2393 int emptySlotIndex = -1; 2394 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2395 TextViewPositionListener listener = mPositionListeners[i]; 2396 if (listener == positionListener) { 2397 return; 2398 } else if (emptySlotIndex < 0 && listener == null) { 2399 emptySlotIndex = i; 2400 } 2401 } 2402 2403 mPositionListeners[emptySlotIndex] = positionListener; 2404 mCanMove[emptySlotIndex] = canMove; 2405 mNumberOfListeners++; 2406 } 2407 2408 public void removeSubscriber(TextViewPositionListener positionListener) { 2409 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2410 if (mPositionListeners[i] == positionListener) { 2411 mPositionListeners[i] = null; 2412 mNumberOfListeners--; 2413 break; 2414 } 2415 } 2416 2417 if (mNumberOfListeners == 0) { 2418 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2419 vto.removeOnPreDrawListener(this); 2420 } 2421 } 2422 2423 public int getPositionX() { 2424 return mPositionX; 2425 } 2426 2427 public int getPositionY() { 2428 return mPositionY; 2429 } 2430 2431 @Override 2432 public boolean onPreDraw() { 2433 updatePosition(); 2434 2435 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2436 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2437 TextViewPositionListener positionListener = mPositionListeners[i]; 2438 if (positionListener != null) { 2439 positionListener.updatePosition(mPositionX, mPositionY, 2440 mPositionHasChanged, mScrollHasChanged); 2441 } 2442 } 2443 } 2444 2445 mScrollHasChanged = false; 2446 return true; 2447 } 2448 2449 private void updatePosition() { 2450 mTextView.getLocationInWindow(mTempCoords); 2451 2452 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2453 2454 mPositionX = mTempCoords[0]; 2455 mPositionY = mTempCoords[1]; 2456 } 2457 2458 public void onScrollChanged() { 2459 mScrollHasChanged = true; 2460 } 2461 } 2462 2463 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2464 protected PopupWindow mPopupWindow; 2465 protected ViewGroup mContentView; 2466 int mPositionX, mPositionY; 2467 2468 protected abstract void createPopupWindow(); 2469 protected abstract void initContentView(); 2470 protected abstract int getTextOffset(); 2471 protected abstract int getVerticalLocalPosition(int line); 2472 protected abstract int clipVertically(int positionY); 2473 2474 public PinnedPopupWindow() { 2475 createPopupWindow(); 2476 2477 mPopupWindow.setWindowLayoutType( 2478 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2479 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2480 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2481 2482 initContentView(); 2483 2484 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2485 ViewGroup.LayoutParams.WRAP_CONTENT); 2486 mContentView.setLayoutParams(wrapContent); 2487 2488 mPopupWindow.setContentView(mContentView); 2489 } 2490 2491 public void show() { 2492 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2493 2494 computeLocalPosition(); 2495 2496 final PositionListener positionListener = getPositionListener(); 2497 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2498 } 2499 2500 protected void measureContent() { 2501 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2502 mContentView.measure( 2503 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2504 View.MeasureSpec.AT_MOST), 2505 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2506 View.MeasureSpec.AT_MOST)); 2507 } 2508 2509 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2510 * positioned according to viewportToContentHorizontalOffset. 2511 * 2512 * This method assumes that mContentView has properly been measured from its content. */ 2513 private void computeLocalPosition() { 2514 measureContent(); 2515 final int width = mContentView.getMeasuredWidth(); 2516 final int offset = getTextOffset(); 2517 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2518 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2519 2520 final int line = mTextView.getLayout().getLineForOffset(offset); 2521 mPositionY = getVerticalLocalPosition(line); 2522 mPositionY += mTextView.viewportToContentVerticalOffset(); 2523 } 2524 2525 private void updatePosition(int parentPositionX, int parentPositionY) { 2526 int positionX = parentPositionX + mPositionX; 2527 int positionY = parentPositionY + mPositionY; 2528 2529 positionY = clipVertically(positionY); 2530 2531 // Horizontal clipping 2532 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2533 final int width = mContentView.getMeasuredWidth(); 2534 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2535 positionX = Math.max(0, positionX); 2536 2537 if (isShowing()) { 2538 mPopupWindow.update(positionX, positionY, -1, -1); 2539 } else { 2540 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2541 positionX, positionY); 2542 } 2543 } 2544 2545 public void hide() { 2546 mPopupWindow.dismiss(); 2547 getPositionListener().removeSubscriber(this); 2548 } 2549 2550 @Override 2551 public void updatePosition(int parentPositionX, int parentPositionY, 2552 boolean parentPositionChanged, boolean parentScrolled) { 2553 // Either parentPositionChanged or parentScrolled is true, check if still visible 2554 if (isShowing() && isOffsetVisible(getTextOffset())) { 2555 if (parentScrolled) computeLocalPosition(); 2556 updatePosition(parentPositionX, parentPositionY); 2557 } else { 2558 hide(); 2559 } 2560 } 2561 2562 public boolean isShowing() { 2563 return mPopupWindow.isShowing(); 2564 } 2565 } 2566 2567 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2568 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2569 private static final int ADD_TO_DICTIONARY = -1; 2570 private static final int DELETE_TEXT = -2; 2571 private SuggestionInfo[] mSuggestionInfos; 2572 private int mNumberOfSuggestions; 2573 private boolean mCursorWasVisibleBeforeSuggestions; 2574 private boolean mIsShowingUp = false; 2575 private SuggestionAdapter mSuggestionsAdapter; 2576 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2577 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2578 2579 private class CustomPopupWindow extends PopupWindow { 2580 public CustomPopupWindow(Context context, int defStyleAttr) { 2581 super(context, null, defStyleAttr); 2582 } 2583 2584 @Override 2585 public void dismiss() { 2586 super.dismiss(); 2587 2588 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2589 2590 // Safe cast since show() checks that mTextView.getText() is an Editable 2591 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2592 2593 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2594 if (hasInsertionController()) { 2595 getInsertionController().show(); 2596 } 2597 } 2598 } 2599 2600 public SuggestionsPopupWindow() { 2601 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2602 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2603 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2604 } 2605 2606 @Override 2607 protected void createPopupWindow() { 2608 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2609 com.android.internal.R.attr.textSuggestionsWindowStyle); 2610 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2611 mPopupWindow.setFocusable(true); 2612 mPopupWindow.setClippingEnabled(false); 2613 } 2614 2615 @Override 2616 protected void initContentView() { 2617 ListView listView = new ListView(mTextView.getContext()); 2618 mSuggestionsAdapter = new SuggestionAdapter(); 2619 listView.setAdapter(mSuggestionsAdapter); 2620 listView.setOnItemClickListener(this); 2621 mContentView = listView; 2622 2623 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2624 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2625 for (int i = 0; i < mSuggestionInfos.length; i++) { 2626 mSuggestionInfos[i] = new SuggestionInfo(); 2627 } 2628 } 2629 2630 public boolean isShowingUp() { 2631 return mIsShowingUp; 2632 } 2633 2634 public void onParentLostFocus() { 2635 mIsShowingUp = false; 2636 } 2637 2638 private class SuggestionInfo { 2639 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2640 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2641 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2642 SpannableStringBuilder text = new SpannableStringBuilder(); 2643 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2644 android.R.style.TextAppearance_SuggestionHighlight); 2645 } 2646 2647 private class SuggestionAdapter extends BaseAdapter { 2648 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2649 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2650 2651 @Override 2652 public int getCount() { 2653 return mNumberOfSuggestions; 2654 } 2655 2656 @Override 2657 public Object getItem(int position) { 2658 return mSuggestionInfos[position]; 2659 } 2660 2661 @Override 2662 public long getItemId(int position) { 2663 return position; 2664 } 2665 2666 @Override 2667 public View getView(int position, View convertView, ViewGroup parent) { 2668 TextView textView = (TextView) convertView; 2669 2670 if (textView == null) { 2671 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2672 parent, false); 2673 } 2674 2675 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2676 textView.setText(suggestionInfo.text); 2677 2678 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2679 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2680 textView.setBackgroundColor(Color.TRANSPARENT); 2681 } else { 2682 textView.setBackgroundColor(Color.WHITE); 2683 } 2684 2685 return textView; 2686 } 2687 } 2688 2689 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2690 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2691 final int flag1 = span1.getFlags(); 2692 final int flag2 = span2.getFlags(); 2693 if (flag1 != flag2) { 2694 // The order here should match what is used in updateDrawState 2695 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2696 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2697 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2698 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2699 if (easy1 && !misspelled1) return -1; 2700 if (easy2 && !misspelled2) return 1; 2701 if (misspelled1) return -1; 2702 if (misspelled2) return 1; 2703 } 2704 2705 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2706 } 2707 } 2708 2709 /** 2710 * Returns the suggestion spans that cover the current cursor position. The suggestion 2711 * spans are sorted according to the length of text that they are attached to. 2712 */ 2713 private SuggestionSpan[] getSuggestionSpans() { 2714 int pos = mTextView.getSelectionStart(); 2715 Spannable spannable = (Spannable) mTextView.getText(); 2716 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2717 2718 mSpansLengths.clear(); 2719 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2720 int start = spannable.getSpanStart(suggestionSpan); 2721 int end = spannable.getSpanEnd(suggestionSpan); 2722 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2723 } 2724 2725 // The suggestions are sorted according to their types (easy correction first, then 2726 // misspelled) and to the length of the text that they cover (shorter first). 2727 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2728 return suggestionSpans; 2729 } 2730 2731 @Override 2732 public void show() { 2733 if (!(mTextView.getText() instanceof Editable)) return; 2734 2735 if (updateSuggestions()) { 2736 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2737 mTextView.setCursorVisible(false); 2738 mIsShowingUp = true; 2739 super.show(); 2740 } 2741 } 2742 2743 @Override 2744 protected void measureContent() { 2745 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2746 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2747 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2748 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2749 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2750 2751 int width = 0; 2752 View view = null; 2753 for (int i = 0; i < mNumberOfSuggestions; i++) { 2754 view = mSuggestionsAdapter.getView(i, view, mContentView); 2755 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2756 view.measure(horizontalMeasure, verticalMeasure); 2757 width = Math.max(width, view.getMeasuredWidth()); 2758 } 2759 2760 // Enforce the width based on actual text widths 2761 mContentView.measure( 2762 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2763 verticalMeasure); 2764 2765 Drawable popupBackground = mPopupWindow.getBackground(); 2766 if (popupBackground != null) { 2767 if (mTempRect == null) mTempRect = new Rect(); 2768 popupBackground.getPadding(mTempRect); 2769 width += mTempRect.left + mTempRect.right; 2770 } 2771 mPopupWindow.setWidth(width); 2772 } 2773 2774 @Override 2775 protected int getTextOffset() { 2776 return mTextView.getSelectionStart(); 2777 } 2778 2779 @Override 2780 protected int getVerticalLocalPosition(int line) { 2781 return mTextView.getLayout().getLineBottom(line); 2782 } 2783 2784 @Override 2785 protected int clipVertically(int positionY) { 2786 final int height = mContentView.getMeasuredHeight(); 2787 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2788 return Math.min(positionY, displayMetrics.heightPixels - height); 2789 } 2790 2791 @Override 2792 public void hide() { 2793 super.hide(); 2794 } 2795 2796 private boolean updateSuggestions() { 2797 Spannable spannable = (Spannable) mTextView.getText(); 2798 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2799 2800 final int nbSpans = suggestionSpans.length; 2801 // Suggestions are shown after a delay: the underlying spans may have been removed 2802 if (nbSpans == 0) return false; 2803 2804 mNumberOfSuggestions = 0; 2805 int spanUnionStart = mTextView.getText().length(); 2806 int spanUnionEnd = 0; 2807 2808 SuggestionSpan misspelledSpan = null; 2809 int underlineColor = 0; 2810 2811 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2812 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2813 final int spanStart = spannable.getSpanStart(suggestionSpan); 2814 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2815 spanUnionStart = Math.min(spanStart, spanUnionStart); 2816 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2817 2818 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2819 misspelledSpan = suggestionSpan; 2820 } 2821 2822 // The first span dictates the background color of the highlighted text 2823 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2824 2825 String[] suggestions = suggestionSpan.getSuggestions(); 2826 int nbSuggestions = suggestions.length; 2827 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2828 String suggestion = suggestions[suggestionIndex]; 2829 2830 boolean suggestionIsDuplicate = false; 2831 for (int i = 0; i < mNumberOfSuggestions; i++) { 2832 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2833 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2834 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2835 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2836 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2837 suggestionIsDuplicate = true; 2838 break; 2839 } 2840 } 2841 } 2842 2843 if (!suggestionIsDuplicate) { 2844 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2845 suggestionInfo.suggestionSpan = suggestionSpan; 2846 suggestionInfo.suggestionIndex = suggestionIndex; 2847 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2848 2849 mNumberOfSuggestions++; 2850 2851 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2852 // Also end outer for loop 2853 spanIndex = nbSpans; 2854 break; 2855 } 2856 } 2857 } 2858 } 2859 2860 for (int i = 0; i < mNumberOfSuggestions; i++) { 2861 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2862 } 2863 2864 // Add "Add to dictionary" item if there is a span with the misspelled flag 2865 if (misspelledSpan != null) { 2866 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2867 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2868 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2869 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2870 suggestionInfo.suggestionSpan = misspelledSpan; 2871 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2872 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2873 getContext().getString(com.android.internal.R.string.addToDictionary)); 2874 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2875 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2876 2877 mNumberOfSuggestions++; 2878 } 2879 } 2880 2881 // Delete item 2882 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2883 suggestionInfo.suggestionSpan = null; 2884 suggestionInfo.suggestionIndex = DELETE_TEXT; 2885 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2886 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2887 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2888 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2889 mNumberOfSuggestions++; 2890 2891 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2892 if (underlineColor == 0) { 2893 // Fallback on the default highlight color when the first span does not provide one 2894 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2895 } else { 2896 final float BACKGROUND_TRANSPARENCY = 0.4f; 2897 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2898 mSuggestionRangeSpan.setBackgroundColor( 2899 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2900 } 2901 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2902 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2903 2904 mSuggestionsAdapter.notifyDataSetChanged(); 2905 return true; 2906 } 2907 2908 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2909 int unionEnd) { 2910 final Spannable text = (Spannable) mTextView.getText(); 2911 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2912 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2913 2914 // Adjust the start/end of the suggestion span 2915 suggestionInfo.suggestionStart = spanStart - unionStart; 2916 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2917 + suggestionInfo.text.length(); 2918 2919 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2920 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2921 2922 // Add the text before and after the span. 2923 final String textAsString = text.toString(); 2924 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2925 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2926 } 2927 2928 @Override 2929 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2930 Editable editable = (Editable) mTextView.getText(); 2931 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2932 2933 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2934 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2935 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2936 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2937 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2938 if (spanUnionEnd < editable.length() && 2939 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2940 (spanUnionStart == 0 || 2941 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2942 spanUnionEnd = spanUnionEnd + 1; 2943 } 2944 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2945 } 2946 hide(); 2947 return; 2948 } 2949 2950 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2951 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2952 if (spanStart < 0 || spanEnd <= spanStart) { 2953 // Span has been removed 2954 hide(); 2955 return; 2956 } 2957 2958 final String originalText = editable.toString().substring(spanStart, spanEnd); 2959 2960 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2961 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2962 intent.putExtra("word", originalText); 2963 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2964 // Put a listener to replace the original text with a word which the user 2965 // modified in a user dictionary dialog. 2966 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2967 mTextView.getContext().startActivity(intent); 2968 // There is no way to know if the word was indeed added. Re-check. 2969 // TODO The ExtractEditText should remove the span in the original text instead 2970 editable.removeSpan(suggestionInfo.suggestionSpan); 2971 Selection.setSelection(editable, spanEnd); 2972 updateSpellCheckSpans(spanStart, spanEnd, false); 2973 } else { 2974 // SuggestionSpans are removed by replace: save them before 2975 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2976 SuggestionSpan.class); 2977 final int length = suggestionSpans.length; 2978 int[] suggestionSpansStarts = new int[length]; 2979 int[] suggestionSpansEnds = new int[length]; 2980 int[] suggestionSpansFlags = new int[length]; 2981 for (int i = 0; i < length; i++) { 2982 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2983 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2984 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2985 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2986 2987 // Remove potential misspelled flags 2988 int suggestionSpanFlags = suggestionSpan.getFlags(); 2989 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2990 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2991 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2992 suggestionSpan.setFlags(suggestionSpanFlags); 2993 } 2994 } 2995 2996 final int suggestionStart = suggestionInfo.suggestionStart; 2997 final int suggestionEnd = suggestionInfo.suggestionEnd; 2998 final String suggestion = suggestionInfo.text.subSequence( 2999 suggestionStart, suggestionEnd).toString(); 3000 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 3001 3002 // Notify source IME of the suggestion pick. Do this before 3003 // swaping texts. 3004 suggestionInfo.suggestionSpan.notifySelection( 3005 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 3006 3007 // Swap text content between actual text and Suggestion span 3008 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 3009 suggestions[suggestionInfo.suggestionIndex] = originalText; 3010 3011 // Restore previous SuggestionSpans 3012 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 3013 for (int i = 0; i < length; i++) { 3014 // Only spans that include the modified region make sense after replacement 3015 // Spans partially included in the replaced region are removed, there is no 3016 // way to assign them a valid range after replacement 3017 if (suggestionSpansStarts[i] <= spanStart && 3018 suggestionSpansEnds[i] >= spanEnd) { 3019 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 3020 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 3021 } 3022 } 3023 3024 // Move cursor at the end of the replaced word 3025 final int newCursorPosition = spanEnd + lengthDifference; 3026 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 3027 } 3028 3029 hide(); 3030 } 3031 } 3032 3033 /** 3034 * An ActionMode Callback class that is used to provide actions while in text selection mode. 3035 * 3036 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 3037 * on which of these this TextView supports. 3038 */ 3039 private class SelectionActionModeCallback extends ActionMode.Callback2 { 3040 private final Path mSelectionPath = new Path(); 3041 private final RectF mSelectionBounds = new RectF(); 3042 3043 private int mSelectionHandleHeight; 3044 private int mInsertionHandleHeight; 3045 3046 public SelectionActionModeCallback() { 3047 SelectionModifierCursorController selectionController = getSelectionController(); 3048 if (selectionController.mStartHandle == null) { 3049 // As these are for initializing selectionController, hide() must be called. 3050 selectionController.initDrawables(); 3051 selectionController.initHandles(); 3052 selectionController.hide(); 3053 } 3054 mSelectionHandleHeight = Math.max( 3055 mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight()); 3056 InsertionPointCursorController insertionController = getInsertionController(); 3057 if (insertionController != null) { 3058 insertionController.getHandle(); 3059 mInsertionHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3060 } 3061 } 3062 3063 @Override 3064 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3065 mode.setTitle(mTextView.getContext().getString( 3066 com.android.internal.R.string.textSelectionCABTitle)); 3067 mode.setSubtitle(null); 3068 mode.setTitleOptionalHint(true); 3069 populateMenuWithItems(menu); 3070 3071 if (mCustomSelectionActionModeCallback != null) { 3072 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 3073 // The custom mode can choose to cancel the action mode 3074 return false; 3075 } 3076 } 3077 3078 addIntentMenuItemsForTextProcessing(menu); 3079 3080 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3081 mTextView.setHasTransientState(true); 3082 return true; 3083 } else { 3084 return false; 3085 } 3086 } 3087 3088 private void populateMenuWithItems(Menu menu) { 3089 if (mTextView.canCut()) { 3090 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 3091 setAlphabeticShortcut('x'). 3092 setShowAsAction( 3093 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3094 } 3095 3096 if (mTextView.canCopy()) { 3097 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 3098 setAlphabeticShortcut('c'). 3099 setShowAsAction( 3100 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3101 } 3102 3103 if (mTextView.canPaste()) { 3104 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 3105 setAlphabeticShortcut('v'). 3106 setShowAsAction( 3107 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3108 } 3109 3110 if (mTextView.canShare()) { 3111 menu.add(0, TextView.ID_SHARE, 0, com.android.internal.R.string.share). 3112 setShowAsAction( 3113 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3114 } 3115 3116 if (mTextView.canSelectAllText()) { 3117 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 3118 setAlphabeticShortcut('a'). 3119 setShowAsAction( 3120 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3121 } 3122 3123 updateReplaceItem(menu); 3124 } 3125 3126 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3127 if (mTextView.canProcessText()) { 3128 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3129 List<ResolveInfo> supportedActivities = 3130 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3131 for (ResolveInfo info : supportedActivities) { 3132 menu.add(info.loadLabel(packageManager)) 3133 .setIntent(createProcessTextIntentForResolveInfo(info)) 3134 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM 3135 | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3136 } 3137 } 3138 } 3139 3140 private Intent createProcessTextIntent() { 3141 return new Intent() 3142 .setAction(Intent.ACTION_PROCESS_TEXT) 3143 .setType("text/plain"); 3144 } 3145 3146 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3147 return createProcessTextIntent() 3148 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3149 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3150 } 3151 3152 @Override 3153 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3154 updateReplaceItem(menu); 3155 3156 if (mCustomSelectionActionModeCallback != null) { 3157 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3158 } 3159 return true; 3160 } 3161 3162 private void updateReplaceItem(Menu menu) { 3163 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3164 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3165 if (canReplace && !replaceItemExists) { 3166 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 3167 setShowAsAction( 3168 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3169 } else if (!canReplace && replaceItemExists) { 3170 menu.removeItem(TextView.ID_REPLACE); 3171 } 3172 } 3173 3174 @Override 3175 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3176 if (item.getIntent() != null 3177 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3178 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3179 mPreserveDetachedSelection = true; 3180 mTextView.startActivityForResult( 3181 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3182 return true; 3183 } 3184 if (mCustomSelectionActionModeCallback != null && 3185 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3186 return true; 3187 } 3188 if (item.getItemId() == TextView.ID_REPLACE) { 3189 onReplace(); 3190 return true; 3191 } 3192 return mTextView.onTextContextMenuItem(item.getItemId()); 3193 } 3194 3195 @Override 3196 public void onDestroyActionMode(ActionMode mode) { 3197 if (mCustomSelectionActionModeCallback != null) { 3198 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3199 } 3200 3201 /* 3202 * If we're ending this mode because we're detaching from a window, 3203 * we still have selection state to preserve. Don't clear it, we'll 3204 * bring back the selection mode when (if) we get reattached. 3205 */ 3206 if (!mPreserveDetachedSelection) { 3207 Selection.setSelection((Spannable) mTextView.getText(), 3208 mTextView.getSelectionEnd()); 3209 mTextView.setHasTransientState(false); 3210 } 3211 3212 if (mSelectionModifierCursorController != null) { 3213 mSelectionModifierCursorController.hide(); 3214 } 3215 3216 mSelectionActionMode = null; 3217 } 3218 3219 @Override 3220 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3221 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3222 super.onGetContentRect(mode, view, outRect); 3223 return; 3224 } 3225 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3226 // We have a selection. 3227 mSelectionPath.reset(); 3228 mTextView.getLayout().getSelectionPath( 3229 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3230 mSelectionPath.computeBounds(mSelectionBounds, true); 3231 mSelectionBounds.bottom += mSelectionHandleHeight; 3232 } else if (mCursorCount == 2) { 3233 // We have a split cursor. In this case, we take the rectangle that includes both 3234 // parts of the cursor to ensure we don't obscure either of them. 3235 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3236 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3237 mSelectionBounds.set( 3238 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3239 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3240 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3241 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3242 + mInsertionHandleHeight); 3243 } else { 3244 // We have a single cursor. 3245 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3246 float primaryHorizontal = 3247 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3248 mSelectionBounds.set( 3249 primaryHorizontal, 3250 mTextView.getLayout().getLineTop(line), 3251 primaryHorizontal + 1, 3252 mTextView.getLayout().getLineTop(line + 1) + mInsertionHandleHeight); 3253 } 3254 // Take TextView's padding and scroll into account. 3255 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3256 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3257 outRect.set( 3258 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3259 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3260 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3261 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3262 } 3263 } 3264 3265 private void onReplace() { 3266 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3267 stopSelectionActionMode(); 3268 Selection.setSelection((Spannable) mTextView.getText(), middle); 3269 showSuggestions(); 3270 } 3271 3272 /** 3273 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3274 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3275 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3276 */ 3277 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3278 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3279 final int[] mTmpIntOffset = new int[2]; 3280 final Matrix mViewToScreenMatrix = new Matrix(); 3281 3282 @Override 3283 public void updatePosition(int parentPositionX, int parentPositionY, 3284 boolean parentPositionChanged, boolean parentScrolled) { 3285 final InputMethodState ims = mInputMethodState; 3286 if (ims == null || ims.mBatchEditNesting > 0) { 3287 return; 3288 } 3289 final InputMethodManager imm = InputMethodManager.peekInstance(); 3290 if (null == imm) { 3291 return; 3292 } 3293 if (!imm.isActive(mTextView)) { 3294 return; 3295 } 3296 // Skip if the IME has not requested the cursor/anchor position. 3297 if (!imm.isCursorAnchorInfoEnabled()) { 3298 return; 3299 } 3300 Layout layout = mTextView.getLayout(); 3301 if (layout == null) { 3302 return; 3303 } 3304 3305 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3306 builder.reset(); 3307 3308 final int selectionStart = mTextView.getSelectionStart(); 3309 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3310 3311 // Construct transformation matrix from view local coordinates to screen coordinates. 3312 mViewToScreenMatrix.set(mTextView.getMatrix()); 3313 mTextView.getLocationOnScreen(mTmpIntOffset); 3314 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3315 builder.setMatrix(mViewToScreenMatrix); 3316 3317 final float viewportToContentHorizontalOffset = 3318 mTextView.viewportToContentHorizontalOffset(); 3319 final float viewportToContentVerticalOffset = 3320 mTextView.viewportToContentVerticalOffset(); 3321 3322 final CharSequence text = mTextView.getText(); 3323 if (text instanceof Spannable) { 3324 final Spannable sp = (Spannable) text; 3325 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3326 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3327 if (composingTextEnd < composingTextStart) { 3328 final int temp = composingTextEnd; 3329 composingTextEnd = composingTextStart; 3330 composingTextStart = temp; 3331 } 3332 final boolean hasComposingText = 3333 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3334 if (hasComposingText) { 3335 final CharSequence composingText = text.subSequence(composingTextStart, 3336 composingTextEnd); 3337 builder.setComposingText(composingTextStart, composingText); 3338 3339 final int minLine = layout.getLineForOffset(composingTextStart); 3340 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3341 for (int line = minLine; line <= maxLine; ++line) { 3342 final int lineStart = layout.getLineStart(line); 3343 final int lineEnd = layout.getLineEnd(line); 3344 final int offsetStart = Math.max(lineStart, composingTextStart); 3345 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3346 final boolean ltrLine = 3347 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3348 final float[] widths = new float[offsetEnd - offsetStart]; 3349 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3350 final float top = layout.getLineTop(line); 3351 final float bottom = layout.getLineBottom(line); 3352 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3353 final float charWidth = widths[offset - offsetStart]; 3354 final boolean isRtl = layout.isRtlCharAt(offset); 3355 final float primary = layout.getPrimaryHorizontal(offset); 3356 final float secondary = layout.getSecondaryHorizontal(offset); 3357 // TODO: This doesn't work perfectly for text with custom styles and 3358 // TAB chars. 3359 final float left; 3360 final float right; 3361 if (ltrLine) { 3362 if (isRtl) { 3363 left = secondary - charWidth; 3364 right = secondary; 3365 } else { 3366 left = primary; 3367 right = primary + charWidth; 3368 } 3369 } else { 3370 if (!isRtl) { 3371 left = secondary; 3372 right = secondary + charWidth; 3373 } else { 3374 left = primary - charWidth; 3375 right = primary; 3376 } 3377 } 3378 // TODO: Check top-right and bottom-left as well. 3379 final float localLeft = left + viewportToContentHorizontalOffset; 3380 final float localRight = right + viewportToContentHorizontalOffset; 3381 final float localTop = top + viewportToContentVerticalOffset; 3382 final float localBottom = bottom + viewportToContentVerticalOffset; 3383 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3384 final boolean isBottomRightVisible = 3385 isPositionVisible(localRight, localBottom); 3386 int characterBoundsFlags = 0; 3387 if (isTopLeftVisible || isBottomRightVisible) { 3388 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3389 } 3390 if (!isTopLeftVisible || !isBottomRightVisible) { 3391 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3392 } 3393 if (isRtl) { 3394 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3395 } 3396 // Here offset is the index in Java chars. 3397 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3398 localBottom, characterBoundsFlags); 3399 } 3400 } 3401 } 3402 } 3403 3404 // Treat selectionStart as the insertion point. 3405 if (0 <= selectionStart) { 3406 final int offset = selectionStart; 3407 final int line = layout.getLineForOffset(offset); 3408 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3409 + viewportToContentHorizontalOffset; 3410 final float insertionMarkerTop = layout.getLineTop(line) 3411 + viewportToContentVerticalOffset; 3412 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3413 + viewportToContentVerticalOffset; 3414 final float insertionMarkerBottom = layout.getLineBottom(line) 3415 + viewportToContentVerticalOffset; 3416 final boolean isTopVisible = 3417 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3418 final boolean isBottomVisible = 3419 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3420 int insertionMarkerFlags = 0; 3421 if (isTopVisible || isBottomVisible) { 3422 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3423 } 3424 if (!isTopVisible || !isBottomVisible) { 3425 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3426 } 3427 if (layout.isRtlCharAt(offset)) { 3428 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3429 } 3430 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3431 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3432 } 3433 3434 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3435 } 3436 } 3437 3438 private abstract class HandleView extends View implements TextViewPositionListener { 3439 protected Drawable mDrawable; 3440 protected Drawable mDrawableLtr; 3441 protected Drawable mDrawableRtl; 3442 private final PopupWindow mContainer; 3443 // Position with respect to the parent TextView 3444 private int mPositionX, mPositionY; 3445 private boolean mIsDragging; 3446 // Offset from touch position to mPosition 3447 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3448 protected int mHotspotX; 3449 protected int mHorizontalGravity; 3450 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3451 private float mTouchOffsetY; 3452 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3453 private float mIdealVerticalOffset; 3454 // Parent's (TextView) previous position in window 3455 private int mLastParentX, mLastParentY; 3456 // Previous text character offset 3457 protected int mPreviousOffset = -1; 3458 // Previous text character offset 3459 private boolean mPositionHasChanged = true; 3460 // Minimum touch target size for handles 3461 private int mMinSize; 3462 // Indicates the line of text that the handle is on. 3463 protected int mPrevLine = -1; 3464 3465 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3466 super(mTextView.getContext()); 3467 mContainer = new PopupWindow(mTextView.getContext(), null, 3468 com.android.internal.R.attr.textSelectHandleWindowStyle); 3469 mContainer.setSplitTouchEnabled(true); 3470 mContainer.setClippingEnabled(false); 3471 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3472 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3473 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3474 mContainer.setContentView(this); 3475 3476 mDrawableLtr = drawableLtr; 3477 mDrawableRtl = drawableRtl; 3478 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3479 com.android.internal.R.dimen.text_handle_min_size); 3480 3481 updateDrawable(); 3482 3483 final int handleHeight = getPreferredHeight(); 3484 mTouchOffsetY = -0.3f * handleHeight; 3485 mIdealVerticalOffset = 0.7f * handleHeight; 3486 } 3487 3488 protected void updateDrawable() { 3489 final int offset = getCurrentCursorOffset(); 3490 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3491 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3492 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3493 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3494 } 3495 3496 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3497 protected abstract int getHorizontalGravity(boolean isRtlRun); 3498 3499 // Touch-up filter: number of previous positions remembered 3500 private static final int HISTORY_SIZE = 5; 3501 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3502 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3503 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3504 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3505 private int mPreviousOffsetIndex = 0; 3506 private int mNumberPreviousOffsets = 0; 3507 3508 private void startTouchUpFilter(int offset) { 3509 mNumberPreviousOffsets = 0; 3510 addPositionToTouchUpFilter(offset); 3511 } 3512 3513 private void addPositionToTouchUpFilter(int offset) { 3514 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3515 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3516 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3517 mNumberPreviousOffsets++; 3518 } 3519 3520 private void filterOnTouchUp() { 3521 final long now = SystemClock.uptimeMillis(); 3522 int i = 0; 3523 int index = mPreviousOffsetIndex; 3524 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3525 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3526 i++; 3527 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3528 } 3529 3530 if (i > 0 && i < iMax && 3531 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3532 positionAtCursorOffset(mPreviousOffsets[index], false); 3533 } 3534 } 3535 3536 public boolean offsetHasBeenChanged() { 3537 return mNumberPreviousOffsets > 1; 3538 } 3539 3540 @Override 3541 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3542 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3543 } 3544 3545 private int getPreferredWidth() { 3546 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3547 } 3548 3549 private int getPreferredHeight() { 3550 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3551 } 3552 3553 public void show() { 3554 if (isShowing()) return; 3555 3556 getPositionListener().addSubscriber(this, true /* local position may change */); 3557 3558 // Make sure the offset is always considered new, even when focusing at same position 3559 mPreviousOffset = -1; 3560 positionAtCursorOffset(getCurrentCursorOffset(), false); 3561 } 3562 3563 protected void dismiss() { 3564 mIsDragging = false; 3565 mContainer.dismiss(); 3566 onDetached(); 3567 } 3568 3569 public void hide() { 3570 dismiss(); 3571 3572 getPositionListener().removeSubscriber(this); 3573 } 3574 3575 public boolean isShowing() { 3576 return mContainer.isShowing(); 3577 } 3578 3579 private boolean isVisible() { 3580 // Always show a dragging handle. 3581 if (mIsDragging) { 3582 return true; 3583 } 3584 3585 if (mTextView.isInBatchEditMode()) { 3586 return false; 3587 } 3588 3589 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3590 } 3591 3592 public abstract int getCurrentCursorOffset(); 3593 3594 protected abstract void updateSelection(int offset); 3595 3596 public abstract void updatePosition(float x, float y); 3597 3598 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3599 // A HandleView relies on the layout, which may be nulled by external methods 3600 Layout layout = mTextView.getLayout(); 3601 if (layout == null) { 3602 // Will update controllers' state, hiding them and stopping selection mode if needed 3603 prepareCursorControllers(); 3604 return; 3605 } 3606 3607 boolean offsetChanged = offset != mPreviousOffset; 3608 if (offsetChanged || parentScrolled) { 3609 if (offsetChanged) { 3610 updateSelection(offset); 3611 addPositionToTouchUpFilter(offset); 3612 } 3613 final int line = layout.getLineForOffset(offset); 3614 mPrevLine = line; 3615 3616 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3617 getHorizontalOffset() + getCursorOffset()); 3618 mPositionY = layout.getLineBottom(line); 3619 3620 // Take TextView's padding and scroll into account. 3621 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3622 mPositionY += mTextView.viewportToContentVerticalOffset(); 3623 3624 mPreviousOffset = offset; 3625 mPositionHasChanged = true; 3626 } 3627 } 3628 3629 public void updatePosition(int parentPositionX, int parentPositionY, 3630 boolean parentPositionChanged, boolean parentScrolled) { 3631 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3632 if (parentPositionChanged || mPositionHasChanged) { 3633 if (mIsDragging) { 3634 // Update touchToWindow offset in case of parent scrolling while dragging 3635 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3636 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3637 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3638 mLastParentX = parentPositionX; 3639 mLastParentY = parentPositionY; 3640 } 3641 3642 onHandleMoved(); 3643 } 3644 3645 if (isVisible()) { 3646 final int positionX = parentPositionX + mPositionX; 3647 final int positionY = parentPositionY + mPositionY; 3648 if (isShowing()) { 3649 mContainer.update(positionX, positionY, -1, -1); 3650 } else { 3651 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3652 positionX, positionY); 3653 } 3654 } else { 3655 if (isShowing()) { 3656 dismiss(); 3657 } 3658 } 3659 3660 mPositionHasChanged = false; 3661 } 3662 } 3663 3664 public void showAtLocation(int offset) { 3665 // TODO - investigate if there's a better way to show the handles 3666 // after the drag accelerator has occured. 3667 int[] tmpCords = new int[2]; 3668 mTextView.getLocationInWindow(tmpCords); 3669 3670 Layout layout = mTextView.getLayout(); 3671 int posX = tmpCords[0]; 3672 int posY = tmpCords[1]; 3673 3674 final int line = layout.getLineForOffset(offset); 3675 3676 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3677 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3678 int startY = layout.getLineBottom(line); 3679 3680 // Take TextView's padding and scroll into account. 3681 startX += mTextView.viewportToContentHorizontalOffset(); 3682 startY += mTextView.viewportToContentVerticalOffset(); 3683 3684 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3685 startX + posX, startY + posY); 3686 } 3687 3688 @Override 3689 protected void onDraw(Canvas c) { 3690 final int drawWidth = mDrawable.getIntrinsicWidth(); 3691 final int left = getHorizontalOffset(); 3692 3693 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3694 mDrawable.draw(c); 3695 } 3696 3697 private int getHorizontalOffset() { 3698 final int width = getPreferredWidth(); 3699 final int drawWidth = mDrawable.getIntrinsicWidth(); 3700 final int left; 3701 switch (mHorizontalGravity) { 3702 case Gravity.LEFT: 3703 left = 0; 3704 break; 3705 default: 3706 case Gravity.CENTER: 3707 left = (width - drawWidth) / 2; 3708 break; 3709 case Gravity.RIGHT: 3710 left = width - drawWidth; 3711 break; 3712 } 3713 return left; 3714 } 3715 3716 protected int getCursorOffset() { 3717 return 0; 3718 } 3719 3720 @Override 3721 public boolean onTouchEvent(MotionEvent ev) { 3722 switch (ev.getActionMasked()) { 3723 case MotionEvent.ACTION_DOWN: { 3724 startTouchUpFilter(getCurrentCursorOffset()); 3725 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3726 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3727 3728 final PositionListener positionListener = getPositionListener(); 3729 mLastParentX = positionListener.getPositionX(); 3730 mLastParentY = positionListener.getPositionY(); 3731 mIsDragging = true; 3732 break; 3733 } 3734 3735 case MotionEvent.ACTION_MOVE: { 3736 final float rawX = ev.getRawX(); 3737 final float rawY = ev.getRawY(); 3738 3739 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3740 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3741 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3742 float newVerticalOffset; 3743 if (previousVerticalOffset < mIdealVerticalOffset) { 3744 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3745 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3746 } else { 3747 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3748 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3749 } 3750 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3751 3752 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3753 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3754 3755 updatePosition(newPosX, newPosY); 3756 break; 3757 } 3758 3759 case MotionEvent.ACTION_UP: 3760 filterOnTouchUp(); 3761 mIsDragging = false; 3762 break; 3763 3764 case MotionEvent.ACTION_CANCEL: 3765 mIsDragging = false; 3766 break; 3767 } 3768 return true; 3769 } 3770 3771 public boolean isDragging() { 3772 return mIsDragging; 3773 } 3774 3775 void onHandleMoved() {} 3776 3777 public void onDetached() {} 3778 } 3779 3780 private class InsertionHandleView extends HandleView { 3781 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3782 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3783 3784 // Used to detect taps on the insertion handle, which will affect the selection action mode 3785 private float mDownPositionX, mDownPositionY; 3786 private Runnable mHider; 3787 3788 public InsertionHandleView(Drawable drawable) { 3789 super(drawable, drawable); 3790 } 3791 3792 @Override 3793 public void show() { 3794 super.show(); 3795 3796 final long durationSinceCutOrCopy = 3797 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3798 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3799 startSelectionActionModeWithoutSelection(); 3800 } 3801 3802 hideAfterDelay(); 3803 } 3804 3805 private void hideAfterDelay() { 3806 if (mHider == null) { 3807 mHider = new Runnable() { 3808 public void run() { 3809 hide(); 3810 } 3811 }; 3812 } else { 3813 removeHiderCallback(); 3814 } 3815 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3816 } 3817 3818 private void removeHiderCallback() { 3819 if (mHider != null) { 3820 mTextView.removeCallbacks(mHider); 3821 } 3822 } 3823 3824 @Override 3825 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3826 return drawable.getIntrinsicWidth() / 2; 3827 } 3828 3829 @Override 3830 protected int getHorizontalGravity(boolean isRtlRun) { 3831 return Gravity.CENTER_HORIZONTAL; 3832 } 3833 3834 @Override 3835 protected int getCursorOffset() { 3836 int offset = super.getCursorOffset(); 3837 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3838 if (cursor != null) { 3839 cursor.getPadding(mTempRect); 3840 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3841 } 3842 return offset; 3843 } 3844 3845 @Override 3846 public boolean onTouchEvent(MotionEvent ev) { 3847 final boolean result = super.onTouchEvent(ev); 3848 3849 switch (ev.getActionMasked()) { 3850 case MotionEvent.ACTION_DOWN: 3851 mDownPositionX = ev.getRawX(); 3852 mDownPositionY = ev.getRawY(); 3853 break; 3854 3855 case MotionEvent.ACTION_UP: 3856 if (!offsetHasBeenChanged()) { 3857 final float deltaX = mDownPositionX - ev.getRawX(); 3858 final float deltaY = mDownPositionY - ev.getRawY(); 3859 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3860 3861 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3862 mTextView.getContext()); 3863 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3864 3865 if (distanceSquared < touchSlop * touchSlop) { 3866 // Tapping on the handle toggles the selection action mode. 3867 if (mSelectionActionMode != null) { 3868 mSelectionActionMode.finish(); 3869 } else { 3870 startSelectionActionModeWithoutSelection(); 3871 } 3872 } 3873 } else { 3874 if (mSelectionActionMode != null) { 3875 mSelectionActionMode.invalidateContentRect(); 3876 } 3877 } 3878 hideAfterDelay(); 3879 break; 3880 3881 case MotionEvent.ACTION_CANCEL: 3882 hideAfterDelay(); 3883 break; 3884 3885 default: 3886 break; 3887 } 3888 3889 return result; 3890 } 3891 3892 @Override 3893 public int getCurrentCursorOffset() { 3894 return mTextView.getSelectionStart(); 3895 } 3896 3897 @Override 3898 public void updateSelection(int offset) { 3899 Selection.setSelection((Spannable) mTextView.getText(), offset); 3900 } 3901 3902 @Override 3903 public void updatePosition(float x, float y) { 3904 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3905 } 3906 3907 @Override 3908 void onHandleMoved() { 3909 super.onHandleMoved(); 3910 removeHiderCallback(); 3911 } 3912 3913 @Override 3914 public void onDetached() { 3915 super.onDetached(); 3916 removeHiderCallback(); 3917 } 3918 } 3919 3920 private class SelectionStartHandleView extends HandleView { 3921 // Indicates whether the cursor is making adjustments within a word. 3922 private boolean mInWord = false; 3923 // Offset to track difference between touch and word boundary. 3924 protected int mTouchWordOffset; 3925 3926 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3927 super(drawableLtr, drawableRtl); 3928 } 3929 3930 @Override 3931 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3932 return isRtlRun ? 0 : drawable.getIntrinsicWidth(); 3933 } 3934 3935 @Override 3936 protected int getHorizontalGravity(boolean isRtlRun) { 3937 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 3938 } 3939 3940 @Override 3941 public int getCurrentCursorOffset() { 3942 return mTextView.getSelectionStart(); 3943 } 3944 3945 @Override 3946 public void updateSelection(int offset) { 3947 Selection.setSelection((Spannable) mTextView.getText(), offset, 3948 mTextView.getSelectionEnd()); 3949 updateDrawable(); 3950 if (mSelectionActionMode != null) { 3951 mSelectionActionMode.invalidate(); 3952 } 3953 } 3954 3955 @Override 3956 public void updatePosition(float x, float y) { 3957 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3958 final int currLine = mTextView.getLineAtCoordinate(y); 3959 boolean positionCursor = false; 3960 int offset = trueOffset; 3961 int end = getWordEnd(offset); 3962 int start = getWordStart(offset); 3963 3964 if (offset < mPreviousOffset) { 3965 // User is increasing the selection. 3966 if (!mInWord || currLine < mPrevLine) { 3967 // We're not in a word, or we're on a different line so we'll expand by 3968 // word. First ensure the user has at least entered the next word. 3969 int offsetToWord = Math.min((end - start) / 2, 2); 3970 if (offset <= end - offsetToWord || currLine < mPrevLine) { 3971 offset = start; 3972 } else { 3973 offset = mPreviousOffset; 3974 } 3975 } 3976 mTouchWordOffset = Math.max(trueOffset - offset, 0); 3977 positionCursor = true; 3978 } else if (offset - mTouchWordOffset > mPreviousOffset || currLine > mPrevLine) { 3979 // User is shrinking the selection. 3980 if (currLine > mPrevLine) { 3981 // We're on a different line, so we'll snap to word boundaries. 3982 offset = start; 3983 mTouchWordOffset = Math.max(trueOffset - offset, 0); 3984 } else { 3985 offset -= mTouchWordOffset; 3986 } 3987 positionCursor = true; 3988 } 3989 3990 // Handles can not cross and selection is at least one character. 3991 if (positionCursor) { 3992 final int selectionEnd = mTextView.getSelectionEnd(); 3993 if (offset >= selectionEnd) { 3994 // We can't cross the handles so let's just constrain the Y value. 3995 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 3996 if (alteredOffset >= selectionEnd) { 3997 // Can't pass the other drag handle. 3998 offset = getNextCursorOffset(selectionEnd, false); 3999 } else { 4000 offset = alteredOffset; 4001 } 4002 mTouchWordOffset = 0; 4003 } 4004 mInWord = !getWordIteratorWithText().isBoundary(offset); 4005 positionAtCursorOffset(offset, false); 4006 } 4007 } 4008 4009 @Override 4010 public boolean onTouchEvent(MotionEvent event) { 4011 boolean superResult = super.onTouchEvent(event); 4012 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4013 // Reset the touch word offset when the user has lifted their finger. 4014 mTouchWordOffset = 0; 4015 } 4016 return superResult; 4017 } 4018 } 4019 4020 private class SelectionEndHandleView extends HandleView { 4021 // Indicates whether the cursor is making adjustments within a word. 4022 private boolean mInWord = false; 4023 // Offset to track difference between touch and word boundary. 4024 protected int mTouchWordOffset; 4025 4026 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 4027 super(drawableLtr, drawableRtl); 4028 } 4029 4030 @Override 4031 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4032 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 4033 } 4034 4035 @Override 4036 protected int getHorizontalGravity(boolean isRtlRun) { 4037 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 4038 } 4039 4040 @Override 4041 public int getCurrentCursorOffset() { 4042 return mTextView.getSelectionEnd(); 4043 } 4044 4045 @Override 4046 public void updateSelection(int offset) { 4047 Selection.setSelection((Spannable) mTextView.getText(), 4048 mTextView.getSelectionStart(), offset); 4049 if (mSelectionActionMode != null) { 4050 mSelectionActionMode.invalidate(); 4051 } 4052 updateDrawable(); 4053 } 4054 4055 @Override 4056 public void updatePosition(float x, float y) { 4057 final int trueOffset = mTextView.getOffsetForPosition(x, y); 4058 final int currLine = mTextView.getLineAtCoordinate(y); 4059 int offset = trueOffset; 4060 boolean positionCursor = false; 4061 int end = getWordEnd(offset); 4062 int start = getWordStart(offset); 4063 4064 if (offset > mPreviousOffset) { 4065 // User is increasing the selection. 4066 if (!mInWord || currLine > mPrevLine) { 4067 // We're not in a word, or we're on a different line so we'll expand by 4068 // word. First ensure the user has at least entered the next word. 4069 int midPoint = Math.min((end - start) / 2, 2); 4070 if (offset >= start + midPoint || currLine > mPrevLine) { 4071 offset = end; 4072 } else { 4073 offset = mPreviousOffset; 4074 } 4075 } 4076 mTouchWordOffset = Math.max(offset - trueOffset, 0); 4077 positionCursor = true; 4078 } else if (offset + mTouchWordOffset < mPreviousOffset || currLine < mPrevLine) { 4079 // User is shrinking the selection. 4080 if (currLine < mPrevLine) { 4081 // We're on a different line, so we'll snap to word boundaries. 4082 offset = end; 4083 mTouchWordOffset = Math.max(offset - trueOffset, 0); 4084 } else { 4085 offset += mTouchWordOffset; 4086 } 4087 positionCursor = true; 4088 } 4089 4090 if (positionCursor) { 4091 final int selectionStart = mTextView.getSelectionStart(); 4092 if (offset <= selectionStart) { 4093 // We can't cross the handles so let's just constrain the Y value. 4094 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 4095 int length = mTextView.getText().length(); 4096 if (alteredOffset <= selectionStart) { 4097 // Can't pass the other drag handle. 4098 offset = getNextCursorOffset(selectionStart, true); 4099 } else { 4100 offset = Math.min(alteredOffset, length); 4101 } 4102 mTouchWordOffset = 0; 4103 } 4104 mInWord = !getWordIteratorWithText().isBoundary(offset); 4105 positionAtCursorOffset(offset, false); 4106 } 4107 } 4108 4109 @Override 4110 public boolean onTouchEvent(MotionEvent event) { 4111 boolean superResult = super.onTouchEvent(event); 4112 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4113 // Reset the touch word offset when the user has lifted their finger. 4114 mTouchWordOffset = 0; 4115 } 4116 return superResult; 4117 } 4118 } 4119 4120 /** 4121 * A CursorController instance can be used to control a cursor in the text. 4122 */ 4123 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4124 /** 4125 * Makes the cursor controller visible on screen. 4126 * See also {@link #hide()}. 4127 */ 4128 public void show(); 4129 4130 /** 4131 * Hide the cursor controller from screen. 4132 * See also {@link #show()}. 4133 */ 4134 public void hide(); 4135 4136 /** 4137 * Called when the view is detached from window. Perform house keeping task, such as 4138 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4139 * preventing the activity from being recycled. 4140 */ 4141 public void onDetached(); 4142 } 4143 4144 private class InsertionPointCursorController implements CursorController { 4145 private InsertionHandleView mHandle; 4146 4147 public void show() { 4148 getHandle().show(); 4149 } 4150 4151 public void hide() { 4152 if (mHandle != null) { 4153 mHandle.hide(); 4154 } 4155 } 4156 4157 public void onTouchModeChanged(boolean isInTouchMode) { 4158 if (!isInTouchMode) { 4159 hide(); 4160 } 4161 } 4162 4163 private InsertionHandleView getHandle() { 4164 if (mSelectHandleCenter == null) { 4165 mSelectHandleCenter = mTextView.getContext().getDrawable( 4166 mTextView.mTextSelectHandleRes); 4167 } 4168 if (mHandle == null) { 4169 mHandle = new InsertionHandleView(mSelectHandleCenter); 4170 } 4171 return mHandle; 4172 } 4173 4174 @Override 4175 public void onDetached() { 4176 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4177 observer.removeOnTouchModeChangeListener(this); 4178 4179 if (mHandle != null) mHandle.onDetached(); 4180 } 4181 } 4182 4183 class SelectionModifierCursorController implements CursorController { 4184 // The cursor controller handles, lazily created when shown. 4185 private SelectionStartHandleView mStartHandle; 4186 private SelectionEndHandleView mEndHandle; 4187 // The offsets of that last touch down event. Remembered to start selection there. 4188 private int mMinTouchOffset, mMaxTouchOffset; 4189 4190 // Double tap detection 4191 private long mPreviousTapUpTime = 0; 4192 private float mDownPositionX, mDownPositionY; 4193 private boolean mGestureStayedInTapRegion; 4194 4195 // Where the user first starts the drag motion. 4196 private int mStartOffset = -1; 4197 // Indicates whether the user is selecting text and using the drag accelerator. 4198 private boolean mDragAcceleratorActive; 4199 4200 SelectionModifierCursorController() { 4201 resetTouchOffsets(); 4202 } 4203 4204 public void show() { 4205 if (mTextView.isInBatchEditMode()) { 4206 return; 4207 } 4208 initDrawables(); 4209 initHandles(); 4210 hideInsertionPointCursorController(); 4211 } 4212 4213 private void initDrawables() { 4214 if (mSelectHandleLeft == null) { 4215 mSelectHandleLeft = mTextView.getContext().getDrawable( 4216 mTextView.mTextSelectHandleLeftRes); 4217 } 4218 if (mSelectHandleRight == null) { 4219 mSelectHandleRight = mTextView.getContext().getDrawable( 4220 mTextView.mTextSelectHandleRightRes); 4221 } 4222 } 4223 4224 private void initHandles() { 4225 // Lazy object creation has to be done before updatePosition() is called. 4226 if (mStartHandle == null) { 4227 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4228 } 4229 if (mEndHandle == null) { 4230 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4231 } 4232 4233 mStartHandle.show(); 4234 mEndHandle.show(); 4235 4236 hideInsertionPointCursorController(); 4237 } 4238 4239 public void hide() { 4240 if (mStartHandle != null) mStartHandle.hide(); 4241 if (mEndHandle != null) mEndHandle.hide(); 4242 } 4243 4244 public void enterDrag() { 4245 // Just need to init the handles / hide insertion cursor. 4246 show(); 4247 mDragAcceleratorActive = true; 4248 // Start location of selection. 4249 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4250 mLastDownPositionY); 4251 // Don't show the handles until user has lifted finger. 4252 hide(); 4253 4254 // This stops scrolling parents from intercepting the touch event, allowing 4255 // the user to continue dragging across the screen to select text; TextView will 4256 // scroll as necessary. 4257 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4258 } 4259 4260 public void onTouchEvent(MotionEvent event) { 4261 // This is done even when the View does not have focus, so that long presses can start 4262 // selection and tap can move cursor from this tap position. 4263 switch (event.getActionMasked()) { 4264 case MotionEvent.ACTION_DOWN: 4265 final float x = event.getX(); 4266 final float y = event.getY(); 4267 4268 // Remember finger down position, to be able to start selection from there. 4269 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4270 4271 // Double tap detection 4272 if (mGestureStayedInTapRegion) { 4273 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 4274 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 4275 final float deltaX = x - mDownPositionX; 4276 final float deltaY = y - mDownPositionY; 4277 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4278 4279 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4280 mTextView.getContext()); 4281 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4282 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4283 4284 if (stayedInArea && isPositionOnText(x, y)) { 4285 startSelectionActionModeWithSelectionAndStartDrag(); 4286 mDiscardNextActionUp = true; 4287 } 4288 } 4289 } 4290 4291 mDownPositionX = x; 4292 mDownPositionY = y; 4293 mGestureStayedInTapRegion = true; 4294 break; 4295 4296 case MotionEvent.ACTION_POINTER_DOWN: 4297 case MotionEvent.ACTION_POINTER_UP: 4298 // Handle multi-point gestures. Keep min and max offset positions. 4299 // Only activated for devices that correctly handle multi-touch. 4300 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4301 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4302 updateMinAndMaxOffsets(event); 4303 } 4304 break; 4305 4306 case MotionEvent.ACTION_MOVE: 4307 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4308 mTextView.getContext()); 4309 4310 if (mGestureStayedInTapRegion) { 4311 final float deltaX = event.getX() - mDownPositionX; 4312 final float deltaY = event.getY() - mDownPositionY; 4313 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4314 4315 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4316 4317 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4318 mGestureStayedInTapRegion = false; 4319 } 4320 } 4321 4322 if (mStartHandle != null && mStartHandle.isShowing()) { 4323 // Don't do the drag if the handles are showing already. 4324 break; 4325 } 4326 4327 if (mStartOffset != -1) { 4328 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4329 event.getY()); 4330 int offset = rawOffset; 4331 4332 // We don't start "dragging" until the user is past the initial word that 4333 // gets selected on long press. 4334 int firstWordStart = getWordStart(mStartOffset); 4335 int firstWordEnd = getWordEnd(mStartOffset); 4336 if (offset > firstWordEnd || offset < firstWordStart) { 4337 4338 // Basically the goal in the below code is to have the highlight be 4339 // offset so that your finger isn't covering the end point. 4340 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4341 float mx = event.getX(); 4342 float my = event.getY(); 4343 if (mx > fingerOffset) mx -= fingerOffset; 4344 if (my > fingerOffset) my -= fingerOffset; 4345 offset = mTextView.getOffsetForPosition(mx, my); 4346 4347 // Perform the check for closeness at edge of view, if we're very close 4348 // don't adjust the offset to be in front of the finger - otherwise the 4349 // user can't select words at the edge. 4350 if (mTextView.getWidth() - fingerOffset > mx) { 4351 // We're going by word, so we need to make sure that the offset 4352 // that we get is within this, so we'll get the previous boundary. 4353 final WordIterator wordIterator = getWordIteratorWithText(); 4354 4355 final int precedingOffset = wordIterator.preceding(offset); 4356 if (mStartOffset < offset) { 4357 // Expanding with bottom handle, in this case the selection end 4358 // is before the finger. 4359 offset = Math.max(precedingOffset - 1, 0); 4360 } else { 4361 // Expand with the start handle, in this case the selection 4362 // start is before the finger. 4363 if (precedingOffset == WordIterator.DONE) { 4364 offset = 0; 4365 } else { 4366 offset = wordIterator.preceding(precedingOffset); 4367 } 4368 } 4369 } 4370 if (offset == WordIterator.DONE) 4371 offset = rawOffset; 4372 4373 // Need to adjust start offset based on direction of movement. 4374 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4375 : getWordEnd(mStartOffset); 4376 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4377 offset); 4378 } 4379 } 4380 break; 4381 4382 case MotionEvent.ACTION_UP: 4383 mPreviousTapUpTime = SystemClock.uptimeMillis(); 4384 if (mDragAcceleratorActive) { 4385 // No longer dragging to select text, let the parent intercept events. 4386 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4387 4388 show(); 4389 int startOffset = mTextView.getSelectionStart(); 4390 int endOffset = mTextView.getSelectionEnd(); 4391 4392 // Since we don't let drag handles pass once they're visible, we need to 4393 // make sure the start / end locations are correct because the user *can* 4394 // switch directions during the initial drag. 4395 if (endOffset < startOffset) { 4396 int tmp = endOffset; 4397 endOffset = startOffset; 4398 startOffset = tmp; 4399 4400 // Also update the selection with the right offsets in this case. 4401 Selection.setSelection((Spannable) mTextView.getText(), 4402 startOffset, endOffset); 4403 } 4404 4405 // Need to do this to display the handles. 4406 mStartHandle.showAtLocation(startOffset); 4407 mEndHandle.showAtLocation(endOffset); 4408 4409 // No longer the first dragging motion, reset. 4410 mDragAcceleratorActive = false; 4411 mStartOffset = -1; 4412 } 4413 break; 4414 } 4415 } 4416 4417 /** 4418 * @param event 4419 */ 4420 private void updateMinAndMaxOffsets(MotionEvent event) { 4421 int pointerCount = event.getPointerCount(); 4422 for (int index = 0; index < pointerCount; index++) { 4423 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4424 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4425 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4426 } 4427 } 4428 4429 public int getMinTouchOffset() { 4430 return mMinTouchOffset; 4431 } 4432 4433 public int getMaxTouchOffset() { 4434 return mMaxTouchOffset; 4435 } 4436 4437 public void resetTouchOffsets() { 4438 mMinTouchOffset = mMaxTouchOffset = -1; 4439 mStartOffset = -1; 4440 mDragAcceleratorActive = false; 4441 } 4442 4443 /** 4444 * @return true iff this controller is currently used to move the selection start. 4445 */ 4446 public boolean isSelectionStartDragged() { 4447 return mStartHandle != null && mStartHandle.isDragging(); 4448 } 4449 4450 /** 4451 * @return true if the user is selecting text using the drag accelerator. 4452 */ 4453 public boolean isDragAcceleratorActive() { 4454 return mDragAcceleratorActive; 4455 } 4456 4457 public void onTouchModeChanged(boolean isInTouchMode) { 4458 if (!isInTouchMode) { 4459 hide(); 4460 } 4461 } 4462 4463 @Override 4464 public void onDetached() { 4465 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4466 observer.removeOnTouchModeChangeListener(this); 4467 4468 if (mStartHandle != null) mStartHandle.onDetached(); 4469 if (mEndHandle != null) mEndHandle.onDetached(); 4470 } 4471 } 4472 4473 private class CorrectionHighlighter { 4474 private final Path mPath = new Path(); 4475 private final Paint mPaint = new Paint(); 4476 private int mStart, mEnd; 4477 private long mFadingStartTime; 4478 private RectF mTempRectF; 4479 private final static int FADE_OUT_DURATION = 400; 4480 4481 public CorrectionHighlighter() { 4482 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4483 applicationScale); 4484 mPaint.setStyle(Paint.Style.FILL); 4485 } 4486 4487 public void highlight(CorrectionInfo info) { 4488 mStart = info.getOffset(); 4489 mEnd = mStart + info.getNewText().length(); 4490 mFadingStartTime = SystemClock.uptimeMillis(); 4491 4492 if (mStart < 0 || mEnd < 0) { 4493 stopAnimation(); 4494 } 4495 } 4496 4497 public void draw(Canvas canvas, int cursorOffsetVertical) { 4498 if (updatePath() && updatePaint()) { 4499 if (cursorOffsetVertical != 0) { 4500 canvas.translate(0, cursorOffsetVertical); 4501 } 4502 4503 canvas.drawPath(mPath, mPaint); 4504 4505 if (cursorOffsetVertical != 0) { 4506 canvas.translate(0, -cursorOffsetVertical); 4507 } 4508 invalidate(true); // TODO invalidate cursor region only 4509 } else { 4510 stopAnimation(); 4511 invalidate(false); // TODO invalidate cursor region only 4512 } 4513 } 4514 4515 private boolean updatePaint() { 4516 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4517 if (duration > FADE_OUT_DURATION) return false; 4518 4519 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4520 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4521 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4522 ((int) (highlightColorAlpha * coef) << 24); 4523 mPaint.setColor(color); 4524 return true; 4525 } 4526 4527 private boolean updatePath() { 4528 final Layout layout = mTextView.getLayout(); 4529 if (layout == null) return false; 4530 4531 // Update in case text is edited while the animation is run 4532 final int length = mTextView.getText().length(); 4533 int start = Math.min(length, mStart); 4534 int end = Math.min(length, mEnd); 4535 4536 mPath.reset(); 4537 layout.getSelectionPath(start, end, mPath); 4538 return true; 4539 } 4540 4541 private void invalidate(boolean delayed) { 4542 if (mTextView.getLayout() == null) return; 4543 4544 if (mTempRectF == null) mTempRectF = new RectF(); 4545 mPath.computeBounds(mTempRectF, false); 4546 4547 int left = mTextView.getCompoundPaddingLeft(); 4548 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4549 4550 if (delayed) { 4551 mTextView.postInvalidateOnAnimation( 4552 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4553 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4554 } else { 4555 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4556 (int) mTempRectF.right, (int) mTempRectF.bottom); 4557 } 4558 } 4559 4560 private void stopAnimation() { 4561 Editor.this.mCorrectionHighlighter = null; 4562 } 4563 } 4564 4565 private static class ErrorPopup extends PopupWindow { 4566 private boolean mAbove = false; 4567 private final TextView mView; 4568 private int mPopupInlineErrorBackgroundId = 0; 4569 private int mPopupInlineErrorAboveBackgroundId = 0; 4570 4571 ErrorPopup(TextView v, int width, int height) { 4572 super(v, width, height); 4573 mView = v; 4574 // Make sure the TextView has a background set as it will be used the first time it is 4575 // shown and positioned. Initialized with below background, which should have 4576 // dimensions identical to the above version for this to work (and is more likely). 4577 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4578 com.android.internal.R.styleable.Theme_errorMessageBackground); 4579 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4580 } 4581 4582 void fixDirection(boolean above) { 4583 mAbove = above; 4584 4585 if (above) { 4586 mPopupInlineErrorAboveBackgroundId = 4587 getResourceId(mPopupInlineErrorAboveBackgroundId, 4588 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4589 } else { 4590 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4591 com.android.internal.R.styleable.Theme_errorMessageBackground); 4592 } 4593 4594 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4595 mPopupInlineErrorBackgroundId); 4596 } 4597 4598 private int getResourceId(int currentId, int index) { 4599 if (currentId == 0) { 4600 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4601 R.styleable.Theme); 4602 currentId = styledAttributes.getResourceId(index, 0); 4603 styledAttributes.recycle(); 4604 } 4605 return currentId; 4606 } 4607 4608 @Override 4609 public void update(int x, int y, int w, int h, boolean force) { 4610 super.update(x, y, w, h, force); 4611 4612 boolean above = isAboveAnchor(); 4613 if (above != mAbove) { 4614 fixDirection(above); 4615 } 4616 } 4617 } 4618 4619 static class InputContentType { 4620 int imeOptions = EditorInfo.IME_NULL; 4621 String privateImeOptions; 4622 CharSequence imeActionLabel; 4623 int imeActionId; 4624 Bundle extras; 4625 OnEditorActionListener onEditorActionListener; 4626 boolean enterDown; 4627 } 4628 4629 static class InputMethodState { 4630 ExtractedTextRequest mExtractedTextRequest; 4631 final ExtractedText mExtractedText = new ExtractedText(); 4632 int mBatchEditNesting; 4633 boolean mCursorChanged; 4634 boolean mSelectionModeChanged; 4635 boolean mContentChanged; 4636 int mChangedStart, mChangedEnd, mChangedDelta; 4637 } 4638 4639 /** 4640 * @return True iff (start, end) is a valid range within the text. 4641 */ 4642 private static boolean isValidRange(CharSequence text, int start, int end) { 4643 return 0 <= start && start <= end && end <= text.length(); 4644 } 4645 4646 /** 4647 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4648 * text being typed (and hence always returns null from the filter() method). 4649 */ 4650 public static class UndoInputFilter implements InputFilter { 4651 private final Editor mEditor; 4652 4653 // Whether the current filter pass is directly caused by an end-user text edit. 4654 private boolean mIsUserEdit; 4655 4656 // Whether the text field is handling an IME composition. Must be parceled in case the user 4657 // rotates the screen during composition. 4658 private boolean mHasComposition; 4659 4660 public UndoInputFilter(Editor editor) { 4661 mEditor = editor; 4662 } 4663 4664 public void saveInstanceState(Parcel parcel) { 4665 parcel.writeInt(mIsUserEdit ? 1 : 0); 4666 parcel.writeInt(mHasComposition ? 1 : 0); 4667 } 4668 4669 public void restoreInstanceState(Parcel parcel) { 4670 mIsUserEdit = parcel.readInt() != 0; 4671 mHasComposition = parcel.readInt() != 0; 4672 } 4673 4674 /** 4675 * Signals that a user-triggered edit is starting. 4676 */ 4677 public void beginBatchEdit() { 4678 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4679 mIsUserEdit = true; 4680 } 4681 4682 public void endBatchEdit() { 4683 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4684 mIsUserEdit = false; 4685 } 4686 4687 @Override 4688 public CharSequence filter(CharSequence source, int start, int end, 4689 Spanned dest, int dstart, int dend) { 4690 if (DEBUG_UNDO) { 4691 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4692 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4693 } 4694 4695 // Check to see if this edit should be tracked for undo. 4696 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4697 return null; 4698 } 4699 4700 // Check for and handle IME composition edits. 4701 if (handleCompositionEdit(source, start, end, dstart)) { 4702 return null; 4703 } 4704 4705 // Handle keyboard edits. 4706 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4707 return null; 4708 } 4709 4710 /** 4711 * Returns true iff the edit was handled, either because it should be ignored or because 4712 * this function created an undo operation for it. 4713 */ 4714 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4715 // Ignore edits while the user is composing. 4716 if (isComposition(source)) { 4717 mHasComposition = true; 4718 return true; 4719 } 4720 final boolean hadComposition = mHasComposition; 4721 mHasComposition = false; 4722 4723 // Check for the transition out of the composing state. 4724 if (hadComposition) { 4725 // If there was no text the user canceled composition. Ignore the edit. 4726 if (start == end) { 4727 return true; 4728 } 4729 4730 // Otherwise the user inserted the composition. 4731 String newText = TextUtils.substring(source, start, end); 4732 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4733 recordEdit(edit, false /* forceMerge */); 4734 return true; 4735 } 4736 4737 // This was neither a composition event nor a transition out of composing. 4738 return false; 4739 } 4740 4741 private void handleKeyboardEdit(CharSequence source, int start, int end, 4742 Spanned dest, int dstart, int dend) { 4743 // An application may install a TextWatcher to provide additional modifications after 4744 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4745 // string). This results in multiple filter() calls for what the user considers to be 4746 // a single operation. Always undo the whole set of changes in one step. 4747 final boolean forceMerge = isInTextWatcher(); 4748 4749 // Build a new operation with all the information from this edit. 4750 String newText = TextUtils.substring(source, start, end); 4751 String oldText = TextUtils.substring(dest, dstart, dend); 4752 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4753 recordEdit(edit, forceMerge); 4754 } 4755 4756 /** 4757 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4758 * If forceMerge is true then the new edit is always merged. 4759 */ 4760 private void recordEdit(EditOperation edit, boolean forceMerge) { 4761 // Fetch the last edit operation and attempt to merge in the new edit. 4762 final UndoManager um = mEditor.mUndoManager; 4763 um.beginUpdate("Edit text"); 4764 EditOperation lastEdit = um.getLastOperation( 4765 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4766 if (lastEdit == null) { 4767 // Add this as the first edit. 4768 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4769 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4770 } else if (forceMerge) { 4771 // Forced merges take priority because they could be the result of a non-user-edit 4772 // change and this case should not create a new undo operation. 4773 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4774 lastEdit.forceMergeWith(edit); 4775 } else if (!mIsUserEdit) { 4776 // An application directly modified the Editable outside of a text edit. Treat this 4777 // as a new change and don't attempt to merge. 4778 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4779 um.commitState(mEditor.mUndoOwner); 4780 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4781 } else if (lastEdit.mergeWith(edit)) { 4782 // Merge succeeded, nothing else to do. 4783 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4784 } else { 4785 // Could not merge with the last edit, so commit the last edit and add this edit. 4786 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4787 um.commitState(mEditor.mUndoOwner); 4788 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4789 } 4790 um.endUpdate(); 4791 } 4792 4793 private boolean canUndoEdit(CharSequence source, int start, int end, 4794 Spanned dest, int dstart, int dend) { 4795 if (!mEditor.mAllowUndo) { 4796 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4797 return false; 4798 } 4799 4800 if (mEditor.mUndoManager.isInUndo()) { 4801 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4802 return false; 4803 } 4804 4805 // Text filters run before input operations are applied. However, some input operations 4806 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4807 // attempt to undo invalid operations. 4808 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4809 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4810 return false; 4811 } 4812 4813 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4814 // on an input field. Skip no-op changes. 4815 if (start == end && dstart == dend) { 4816 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4817 return false; 4818 } 4819 4820 return true; 4821 } 4822 4823 private boolean isComposition(CharSequence source) { 4824 if (!(source instanceof Spannable)) { 4825 return false; 4826 } 4827 // This is a composition edit if the source has a non-zero-length composing span. 4828 Spannable text = (Spannable) source; 4829 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4830 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4831 return composeBegin < composeEnd; 4832 } 4833 4834 private boolean isInTextWatcher() { 4835 CharSequence text = mEditor.mTextView.getText(); 4836 return (text instanceof SpannableStringBuilder) 4837 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4838 } 4839 } 4840 4841 /** 4842 * An operation to undo a single "edit" to a text view. 4843 */ 4844 public static class EditOperation extends UndoOperation<Editor> { 4845 private static final int TYPE_INSERT = 0; 4846 private static final int TYPE_DELETE = 1; 4847 private static final int TYPE_REPLACE = 2; 4848 4849 private int mType; 4850 private String mOldText; 4851 private int mOldTextStart; 4852 private String mNewText; 4853 private int mNewTextStart; 4854 4855 private int mOldCursorPos; 4856 private int mNewCursorPos; 4857 4858 /** 4859 * Constructs an edit operation from a text input operation on editor that replaces the 4860 * oldText starting at dstart with newText. 4861 */ 4862 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 4863 super(editor.mUndoOwner); 4864 mOldText = oldText; 4865 mNewText = newText; 4866 4867 // Determine the type of the edit and store where it occurred. Avoid storing 4868 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4869 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4870 // outside the bounds of the final text). 4871 if (mNewText.length() > 0 && mOldText.length() == 0) { 4872 mType = TYPE_INSERT; 4873 mNewTextStart = dstart; 4874 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4875 mType = TYPE_DELETE; 4876 mOldTextStart = dstart; 4877 } else { 4878 mType = TYPE_REPLACE; 4879 mOldTextStart = mNewTextStart = dstart; 4880 } 4881 4882 // Store cursor data. 4883 mOldCursorPos = editor.mTextView.getSelectionStart(); 4884 mNewCursorPos = dstart + mNewText.length(); 4885 } 4886 4887 public EditOperation(Parcel src, ClassLoader loader) { 4888 super(src, loader); 4889 mType = src.readInt(); 4890 mOldText = src.readString(); 4891 mOldTextStart = src.readInt(); 4892 mNewText = src.readString(); 4893 mNewTextStart = src.readInt(); 4894 mOldCursorPos = src.readInt(); 4895 mNewCursorPos = src.readInt(); 4896 } 4897 4898 @Override 4899 public void writeToParcel(Parcel dest, int flags) { 4900 dest.writeInt(mType); 4901 dest.writeString(mOldText); 4902 dest.writeInt(mOldTextStart); 4903 dest.writeString(mNewText); 4904 dest.writeInt(mNewTextStart); 4905 dest.writeInt(mOldCursorPos); 4906 dest.writeInt(mNewCursorPos); 4907 } 4908 4909 private int getNewTextEnd() { 4910 return mNewTextStart + mNewText.length(); 4911 } 4912 4913 private int getOldTextEnd() { 4914 return mOldTextStart + mOldText.length(); 4915 } 4916 4917 @Override 4918 public void commit() { 4919 } 4920 4921 @Override 4922 public void undo() { 4923 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4924 // Remove the new text and insert the old. 4925 Editor editor = getOwnerData(); 4926 Editable text = (Editable) editor.mTextView.getText(); 4927 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4928 mOldCursorPos); 4929 } 4930 4931 @Override 4932 public void redo() { 4933 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4934 // Remove the old text and insert the new. 4935 Editor editor = getOwnerData(); 4936 Editable text = (Editable) editor.mTextView.getText(); 4937 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4938 mNewCursorPos); 4939 } 4940 4941 /** 4942 * Attempts to merge this existing operation with a new edit. 4943 * @param edit The new edit operation. 4944 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4945 * object unchanged. 4946 */ 4947 private boolean mergeWith(EditOperation edit) { 4948 if (DEBUG_UNDO) { 4949 Log.d(TAG, "mergeWith old " + this); 4950 Log.d(TAG, "mergeWith new " + edit); 4951 } 4952 switch (mType) { 4953 case TYPE_INSERT: 4954 return mergeInsertWith(edit); 4955 case TYPE_DELETE: 4956 return mergeDeleteWith(edit); 4957 case TYPE_REPLACE: 4958 return mergeReplaceWith(edit); 4959 default: 4960 return false; 4961 } 4962 } 4963 4964 private boolean mergeInsertWith(EditOperation edit) { 4965 // Only merge continuous insertions. 4966 if (edit.mType != TYPE_INSERT) { 4967 return false; 4968 } 4969 // Only merge insertions that are contiguous. 4970 if (getNewTextEnd() != edit.mNewTextStart) { 4971 return false; 4972 } 4973 mNewText += edit.mNewText; 4974 mNewCursorPos = edit.mNewCursorPos; 4975 return true; 4976 } 4977 4978 // TODO: Support forward delete. 4979 private boolean mergeDeleteWith(EditOperation edit) { 4980 // Only merge continuous deletes. 4981 if (edit.mType != TYPE_DELETE) { 4982 return false; 4983 } 4984 // Only merge deletions that are contiguous. 4985 if (mOldTextStart != edit.getOldTextEnd()) { 4986 return false; 4987 } 4988 mOldTextStart = edit.mOldTextStart; 4989 mOldText = edit.mOldText + mOldText; 4990 mNewCursorPos = edit.mNewCursorPos; 4991 return true; 4992 } 4993 4994 private boolean mergeReplaceWith(EditOperation edit) { 4995 // Replacements can merge only with adjacent inserts. 4996 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 4997 return false; 4998 } 4999 mOldText += edit.mOldText; 5000 mNewText += edit.mNewText; 5001 mNewCursorPos = edit.mNewCursorPos; 5002 return true; 5003 } 5004 5005 /** 5006 * Forcibly creates a single merged edit operation by simulating the entire text 5007 * contents being replaced. 5008 */ 5009 public void forceMergeWith(EditOperation edit) { 5010 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5011 Editor editor = getOwnerData(); 5012 5013 // Copy the text of the current field. 5014 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5015 // but would require two parallel implementations of modifyText() because Editable and 5016 // StringBuilder do not share an interface for replace/delete/insert. 5017 Editable editable = (Editable) editor.mTextView.getText(); 5018 Editable originalText = new SpannableStringBuilder(editable.toString()); 5019 5020 // Roll back the last operation. 5021 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5022 mOldCursorPos); 5023 5024 // Clone the text again and apply the new operation. 5025 Editable finalText = new SpannableStringBuilder(editable.toString()); 5026 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5027 edit.mNewTextStart, edit.mNewCursorPos); 5028 5029 // Convert this operation into a non-mergeable replacement of the entire string. 5030 mType = TYPE_REPLACE; 5031 mNewText = finalText.toString(); 5032 mNewTextStart = 0; 5033 mOldText = originalText.toString(); 5034 mOldTextStart = 0; 5035 mNewCursorPos = edit.mNewCursorPos; 5036 // mOldCursorPos is unchanged. 5037 } 5038 5039 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5040 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5041 // Apply the edit if it is still valid. 5042 if (isValidRange(text, deleteFrom, deleteTo) && 5043 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5044 if (deleteFrom != deleteTo) { 5045 text.delete(deleteFrom, deleteTo); 5046 } 5047 if (newText.length() != 0) { 5048 text.insert(newTextInsertAt, newText); 5049 } 5050 } 5051 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5052 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5053 // TODO: Select all the text that was undone. 5054 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5055 Selection.setSelection(text, newCursorPos); 5056 } 5057 } 5058 5059 private String getTypeString() { 5060 switch (mType) { 5061 case TYPE_INSERT: 5062 return "insert"; 5063 case TYPE_DELETE: 5064 return "delete"; 5065 case TYPE_REPLACE: 5066 return "replace"; 5067 default: 5068 return ""; 5069 } 5070 } 5071 5072 @Override 5073 public String toString() { 5074 return "[mType=" + getTypeString() + ", " + 5075 "mOldText=" + mOldText + ", " + 5076 "mOldTextStart=" + mOldTextStart + ", " + 5077 "mNewText=" + mNewText + ", " + 5078 "mNewTextStart=" + mNewTextStart + ", " + 5079 "mOldCursorPos=" + mOldCursorPos + ", " + 5080 "mNewCursorPos=" + mNewCursorPos + "]"; 5081 } 5082 5083 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5084 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5085 @Override 5086 public EditOperation createFromParcel(Parcel in) { 5087 return new EditOperation(in, null); 5088 } 5089 5090 @Override 5091 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5092 return new EditOperation(in, loader); 5093 } 5094 5095 @Override 5096 public EditOperation[] newArray(int size) { 5097 return new EditOperation[size]; 5098 } 5099 }; 5100 } 5101} 5102