Editor.java revision 6c7b4ad690fe5c22c01ad79a232e567e835f676d
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 = getCharRange(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 long getCharRange(int offset) { 892 final int textLength = mTextView.getText().length(); 893 if (offset + 1 < textLength) { 894 final char currentChar = mTextView.getText().charAt(offset); 895 final char nextChar = mTextView.getText().charAt(offset + 1); 896 if (Character.isSurrogatePair(currentChar, nextChar)) { 897 return TextUtils.packRangeInLong(offset, offset + 2); 898 } 899 } 900 if (offset < textLength) { 901 return TextUtils.packRangeInLong(offset, offset + 1); 902 } 903 if (offset - 2 >= 0) { 904 final char previousChar = mTextView.getText().charAt(offset - 1); 905 final char previousPreviousChar = mTextView.getText().charAt(offset - 2); 906 if (Character.isSurrogatePair(previousPreviousChar, previousChar)) { 907 return TextUtils.packRangeInLong(offset - 2, offset); 908 } 909 } 910 if (offset - 1 >= 0) { 911 return TextUtils.packRangeInLong(offset - 1, offset); 912 } 913 return TextUtils.packRangeInLong(offset, offset); 914 } 915 916 private boolean touchPositionIsInSelection() { 917 int selectionStart = mTextView.getSelectionStart(); 918 int selectionEnd = mTextView.getSelectionEnd(); 919 920 if (selectionStart == selectionEnd) { 921 return false; 922 } 923 924 if (selectionStart > selectionEnd) { 925 int tmp = selectionStart; 926 selectionStart = selectionEnd; 927 selectionEnd = tmp; 928 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 929 } 930 931 SelectionModifierCursorController selectionController = getSelectionController(); 932 int minOffset = selectionController.getMinTouchOffset(); 933 int maxOffset = selectionController.getMaxTouchOffset(); 934 935 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 936 } 937 938 private PositionListener getPositionListener() { 939 if (mPositionListener == null) { 940 mPositionListener = new PositionListener(); 941 } 942 return mPositionListener; 943 } 944 945 private interface TextViewPositionListener { 946 public void updatePosition(int parentPositionX, int parentPositionY, 947 boolean parentPositionChanged, boolean parentScrolled); 948 } 949 950 private boolean isPositionVisible(final float positionX, final float positionY) { 951 synchronized (TEMP_POSITION) { 952 final float[] position = TEMP_POSITION; 953 position[0] = positionX; 954 position[1] = positionY; 955 View view = mTextView; 956 957 while (view != null) { 958 if (view != mTextView) { 959 // Local scroll is already taken into account in positionX/Y 960 position[0] -= view.getScrollX(); 961 position[1] -= view.getScrollY(); 962 } 963 964 if (position[0] < 0 || position[1] < 0 || 965 position[0] > view.getWidth() || position[1] > view.getHeight()) { 966 return false; 967 } 968 969 if (!view.getMatrix().isIdentity()) { 970 view.getMatrix().mapPoints(position); 971 } 972 973 position[0] += view.getLeft(); 974 position[1] += view.getTop(); 975 976 final ViewParent parent = view.getParent(); 977 if (parent instanceof View) { 978 view = (View) parent; 979 } else { 980 // We've reached the ViewRoot, stop iterating 981 view = null; 982 } 983 } 984 } 985 986 // We've been able to walk up the view hierarchy and the position was never clipped 987 return true; 988 } 989 990 private boolean isOffsetVisible(int offset) { 991 Layout layout = mTextView.getLayout(); 992 if (layout == null) return false; 993 994 final int line = layout.getLineForOffset(offset); 995 final int lineBottom = layout.getLineBottom(line); 996 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 997 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 998 lineBottom + mTextView.viewportToContentVerticalOffset()); 999 } 1000 1001 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1002 * in the view. Returns false when the position is in the empty space of left/right of text. 1003 */ 1004 private boolean isPositionOnText(float x, float y) { 1005 Layout layout = mTextView.getLayout(); 1006 if (layout == null) return false; 1007 1008 final int line = mTextView.getLineAtCoordinate(y); 1009 x = mTextView.convertToLocalHorizontalCoordinate(x); 1010 1011 if (x < layout.getLineLeft(line)) return false; 1012 if (x > layout.getLineRight(line)) return false; 1013 return true; 1014 } 1015 1016 public boolean performLongClick(boolean handled) { 1017 // Long press in empty space moves cursor and starts the selection action mode. 1018 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 1019 mInsertionControllerEnabled) { 1020 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1021 mLastDownPositionY); 1022 stopSelectionActionMode(); 1023 Selection.setSelection((Spannable) mTextView.getText(), offset); 1024 getInsertionController().show(); 1025 startSelectionActionModeWithoutSelection(); 1026 handled = true; 1027 } 1028 1029 if (!handled && mSelectionActionMode != null) { 1030 if (touchPositionIsInSelection()) { 1031 // Start a drag 1032 final int start = mTextView.getSelectionStart(); 1033 final int end = mTextView.getSelectionEnd(); 1034 CharSequence selectedText = mTextView.getTransformedText(start, end); 1035 ClipData data = ClipData.newPlainText(null, selectedText); 1036 DragLocalState localState = new DragLocalState(mTextView, start, end); 1037 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 1038 View.DRAG_FLAG_GLOBAL); 1039 stopSelectionActionMode(); 1040 } else { 1041 stopSelectionActionMode(); 1042 startSelectionActionModeWithSelectionAndStartDrag(); 1043 } 1044 handled = true; 1045 } 1046 1047 // Start a new selection 1048 if (!handled) { 1049 handled = startSelectionActionModeWithSelectionAndStartDrag(); 1050 } 1051 1052 return handled; 1053 } 1054 1055 private long getLastTouchOffsets() { 1056 SelectionModifierCursorController selectionController = getSelectionController(); 1057 final int minOffset = selectionController.getMinTouchOffset(); 1058 final int maxOffset = selectionController.getMaxTouchOffset(); 1059 return TextUtils.packRangeInLong(minOffset, maxOffset); 1060 } 1061 1062 void onFocusChanged(boolean focused, int direction) { 1063 mShowCursor = SystemClock.uptimeMillis(); 1064 ensureEndedBatchEdit(); 1065 1066 if (focused) { 1067 int selStart = mTextView.getSelectionStart(); 1068 int selEnd = mTextView.getSelectionEnd(); 1069 1070 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1071 // mode for these, unless there was a specific selection already started. 1072 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1073 selEnd == mTextView.getText().length(); 1074 1075 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1076 !isFocusHighlighted; 1077 1078 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1079 // If a tap was used to give focus to that view, move cursor at tap position. 1080 // Has to be done before onTakeFocus, which can be overloaded. 1081 final int lastTapPosition = getLastTapPosition(); 1082 if (lastTapPosition >= 0) { 1083 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1084 } 1085 1086 // Note this may have to be moved out of the Editor class 1087 MovementMethod mMovement = mTextView.getMovementMethod(); 1088 if (mMovement != null) { 1089 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1090 } 1091 1092 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1093 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1094 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1095 // This special case ensure that we keep current selection in that case. 1096 // It would be better to know why the DecorView does not have focus at that time. 1097 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1098 selStart >= 0 && selEnd >= 0) { 1099 /* 1100 * Someone intentionally set the selection, so let them 1101 * do whatever it is that they wanted to do instead of 1102 * the default on-focus behavior. We reset the selection 1103 * here instead of just skipping the onTakeFocus() call 1104 * because some movement methods do something other than 1105 * just setting the selection in theirs and we still 1106 * need to go through that path. 1107 */ 1108 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1109 } 1110 1111 if (mSelectAllOnFocus) { 1112 mTextView.selectAllText(); 1113 } 1114 1115 mTouchFocusSelected = true; 1116 } 1117 1118 mFrozenWithFocus = false; 1119 mSelectionMoved = false; 1120 1121 if (mError != null) { 1122 showError(); 1123 } 1124 1125 makeBlink(); 1126 } else { 1127 if (mError != null) { 1128 hideError(); 1129 } 1130 // Don't leave us in the middle of a batch edit. 1131 mTextView.onEndBatchEdit(); 1132 1133 if (mTextView instanceof ExtractEditText) { 1134 // terminateTextSelectionMode removes selection, which we want to keep when 1135 // ExtractEditText goes out of focus. 1136 final int selStart = mTextView.getSelectionStart(); 1137 final int selEnd = mTextView.getSelectionEnd(); 1138 hideControllers(); 1139 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1140 } else { 1141 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1142 hideControllers(); 1143 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1144 downgradeEasyCorrectionSpans(); 1145 } 1146 1147 // No need to create the controller 1148 if (mSelectionModifierCursorController != null) { 1149 mSelectionModifierCursorController.resetTouchOffsets(); 1150 } 1151 } 1152 } 1153 1154 /** 1155 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1156 * span. 1157 */ 1158 private void downgradeEasyCorrectionSpans() { 1159 CharSequence text = mTextView.getText(); 1160 if (text instanceof Spannable) { 1161 Spannable spannable = (Spannable) text; 1162 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1163 spannable.length(), SuggestionSpan.class); 1164 for (int i = 0; i < suggestionSpans.length; i++) { 1165 int flags = suggestionSpans[i].getFlags(); 1166 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1167 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1168 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1169 suggestionSpans[i].setFlags(flags); 1170 } 1171 } 1172 } 1173 } 1174 1175 void sendOnTextChanged(int start, int after) { 1176 updateSpellCheckSpans(start, start + after, false); 1177 1178 // Flip flag to indicate the word iterator needs to have the text reset. 1179 mUpdateWordIteratorText = true; 1180 1181 // Hide the controllers as soon as text is modified (typing, procedural...) 1182 // We do not hide the span controllers, since they can be added when a new text is 1183 // inserted into the text view (voice IME). 1184 hideCursorControllers(); 1185 } 1186 1187 private int getLastTapPosition() { 1188 // No need to create the controller at that point, no last tap position saved 1189 if (mSelectionModifierCursorController != null) { 1190 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1191 if (lastTapPosition >= 0) { 1192 // Safety check, should not be possible. 1193 if (lastTapPosition > mTextView.getText().length()) { 1194 lastTapPosition = mTextView.getText().length(); 1195 } 1196 return lastTapPosition; 1197 } 1198 } 1199 1200 return -1; 1201 } 1202 1203 void onWindowFocusChanged(boolean hasWindowFocus) { 1204 if (hasWindowFocus) { 1205 if (mBlink != null) { 1206 mBlink.uncancel(); 1207 makeBlink(); 1208 } 1209 } else { 1210 if (mBlink != null) { 1211 mBlink.cancel(); 1212 } 1213 if (mInputContentType != null) { 1214 mInputContentType.enterDown = false; 1215 } 1216 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1217 hideControllers(); 1218 if (mSuggestionsPopupWindow != null) { 1219 mSuggestionsPopupWindow.onParentLostFocus(); 1220 } 1221 1222 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1223 ensureEndedBatchEdit(); 1224 } 1225 } 1226 1227 void onTouchEvent(MotionEvent event) { 1228 if (hasSelectionController()) { 1229 getSelectionController().onTouchEvent(event); 1230 } 1231 1232 if (mShowSuggestionRunnable != null) { 1233 mTextView.removeCallbacks(mShowSuggestionRunnable); 1234 mShowSuggestionRunnable = null; 1235 } 1236 1237 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1238 mLastDownPositionX = event.getX(); 1239 mLastDownPositionY = event.getY(); 1240 1241 // Reset this state; it will be re-set if super.onTouchEvent 1242 // causes focus to move to the view. 1243 mTouchFocusSelected = false; 1244 mIgnoreActionUpEvent = false; 1245 } 1246 } 1247 1248 public void beginBatchEdit() { 1249 mInBatchEditControllers = true; 1250 final InputMethodState ims = mInputMethodState; 1251 if (ims != null) { 1252 int nesting = ++ims.mBatchEditNesting; 1253 if (nesting == 1) { 1254 ims.mCursorChanged = false; 1255 ims.mChangedDelta = 0; 1256 if (ims.mContentChanged) { 1257 // We already have a pending change from somewhere else, 1258 // so turn this into a full update. 1259 ims.mChangedStart = 0; 1260 ims.mChangedEnd = mTextView.getText().length(); 1261 } else { 1262 ims.mChangedStart = EXTRACT_UNKNOWN; 1263 ims.mChangedEnd = EXTRACT_UNKNOWN; 1264 ims.mContentChanged = false; 1265 } 1266 mUndoInputFilter.beginBatchEdit(); 1267 mTextView.onBeginBatchEdit(); 1268 } 1269 } 1270 } 1271 1272 public void endBatchEdit() { 1273 mInBatchEditControllers = false; 1274 final InputMethodState ims = mInputMethodState; 1275 if (ims != null) { 1276 int nesting = --ims.mBatchEditNesting; 1277 if (nesting == 0) { 1278 finishBatchEdit(ims); 1279 } 1280 } 1281 } 1282 1283 void ensureEndedBatchEdit() { 1284 final InputMethodState ims = mInputMethodState; 1285 if (ims != null && ims.mBatchEditNesting != 0) { 1286 ims.mBatchEditNesting = 0; 1287 finishBatchEdit(ims); 1288 } 1289 } 1290 1291 void finishBatchEdit(final InputMethodState ims) { 1292 mTextView.onEndBatchEdit(); 1293 mUndoInputFilter.endBatchEdit(); 1294 1295 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1296 mTextView.updateAfterEdit(); 1297 reportExtractedText(); 1298 } else if (ims.mCursorChanged) { 1299 // Cheesy way to get us to report the current cursor location. 1300 mTextView.invalidateCursor(); 1301 } 1302 // sendUpdateSelection knows to avoid sending if the selection did 1303 // not actually change. 1304 sendUpdateSelection(); 1305 } 1306 1307 static final int EXTRACT_NOTHING = -2; 1308 static final int EXTRACT_UNKNOWN = -1; 1309 1310 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1311 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1312 EXTRACT_UNKNOWN, outText); 1313 } 1314 1315 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1316 int partialStartOffset, int partialEndOffset, int delta, 1317 @Nullable ExtractedText outText) { 1318 if (request == null || outText == null) { 1319 return false; 1320 } 1321 1322 final CharSequence content = mTextView.getText(); 1323 if (content == null) { 1324 return false; 1325 } 1326 1327 if (partialStartOffset != EXTRACT_NOTHING) { 1328 final int N = content.length(); 1329 if (partialStartOffset < 0) { 1330 outText.partialStartOffset = outText.partialEndOffset = -1; 1331 partialStartOffset = 0; 1332 partialEndOffset = N; 1333 } else { 1334 // Now use the delta to determine the actual amount of text 1335 // we need. 1336 partialEndOffset += delta; 1337 // Adjust offsets to ensure we contain full spans. 1338 if (content instanceof Spanned) { 1339 Spanned spanned = (Spanned)content; 1340 Object[] spans = spanned.getSpans(partialStartOffset, 1341 partialEndOffset, ParcelableSpan.class); 1342 int i = spans.length; 1343 while (i > 0) { 1344 i--; 1345 int j = spanned.getSpanStart(spans[i]); 1346 if (j < partialStartOffset) partialStartOffset = j; 1347 j = spanned.getSpanEnd(spans[i]); 1348 if (j > partialEndOffset) partialEndOffset = j; 1349 } 1350 } 1351 outText.partialStartOffset = partialStartOffset; 1352 outText.partialEndOffset = partialEndOffset - delta; 1353 1354 if (partialStartOffset > N) { 1355 partialStartOffset = N; 1356 } else if (partialStartOffset < 0) { 1357 partialStartOffset = 0; 1358 } 1359 if (partialEndOffset > N) { 1360 partialEndOffset = N; 1361 } else if (partialEndOffset < 0) { 1362 partialEndOffset = 0; 1363 } 1364 } 1365 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1366 outText.text = content.subSequence(partialStartOffset, 1367 partialEndOffset); 1368 } else { 1369 outText.text = TextUtils.substring(content, partialStartOffset, 1370 partialEndOffset); 1371 } 1372 } else { 1373 outText.partialStartOffset = 0; 1374 outText.partialEndOffset = 0; 1375 outText.text = ""; 1376 } 1377 outText.flags = 0; 1378 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1379 outText.flags |= ExtractedText.FLAG_SELECTING; 1380 } 1381 if (mTextView.isSingleLine()) { 1382 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1383 } 1384 outText.startOffset = 0; 1385 outText.selectionStart = mTextView.getSelectionStart(); 1386 outText.selectionEnd = mTextView.getSelectionEnd(); 1387 return true; 1388 } 1389 1390 boolean reportExtractedText() { 1391 final Editor.InputMethodState ims = mInputMethodState; 1392 if (ims != null) { 1393 final boolean contentChanged = ims.mContentChanged; 1394 if (contentChanged || ims.mSelectionModeChanged) { 1395 ims.mContentChanged = false; 1396 ims.mSelectionModeChanged = false; 1397 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1398 if (req != null) { 1399 InputMethodManager imm = InputMethodManager.peekInstance(); 1400 if (imm != null) { 1401 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1402 "Retrieving extracted start=" + ims.mChangedStart + 1403 " end=" + ims.mChangedEnd + 1404 " delta=" + ims.mChangedDelta); 1405 if (ims.mChangedStart < 0 && !contentChanged) { 1406 ims.mChangedStart = EXTRACT_NOTHING; 1407 } 1408 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1409 ims.mChangedDelta, ims.mExtractedText)) { 1410 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1411 "Reporting extracted start=" + 1412 ims.mExtractedText.partialStartOffset + 1413 " end=" + ims.mExtractedText.partialEndOffset + 1414 ": " + ims.mExtractedText.text); 1415 1416 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1417 ims.mChangedStart = EXTRACT_UNKNOWN; 1418 ims.mChangedEnd = EXTRACT_UNKNOWN; 1419 ims.mChangedDelta = 0; 1420 ims.mContentChanged = false; 1421 return true; 1422 } 1423 } 1424 } 1425 } 1426 } 1427 return false; 1428 } 1429 1430 private void sendUpdateSelection() { 1431 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1432 final InputMethodManager imm = InputMethodManager.peekInstance(); 1433 if (null != imm) { 1434 final int selectionStart = mTextView.getSelectionStart(); 1435 final int selectionEnd = mTextView.getSelectionEnd(); 1436 int candStart = -1; 1437 int candEnd = -1; 1438 if (mTextView.getText() instanceof Spannable) { 1439 final Spannable sp = (Spannable) mTextView.getText(); 1440 candStart = EditableInputConnection.getComposingSpanStart(sp); 1441 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1442 } 1443 // InputMethodManager#updateSelection skips sending the message if 1444 // none of the parameters have changed since the last time we called it. 1445 imm.updateSelection(mTextView, 1446 selectionStart, selectionEnd, candStart, candEnd); 1447 } 1448 } 1449 } 1450 1451 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1452 int cursorOffsetVertical) { 1453 final int selectionStart = mTextView.getSelectionStart(); 1454 final int selectionEnd = mTextView.getSelectionEnd(); 1455 1456 final InputMethodState ims = mInputMethodState; 1457 if (ims != null && ims.mBatchEditNesting == 0) { 1458 InputMethodManager imm = InputMethodManager.peekInstance(); 1459 if (imm != null) { 1460 if (imm.isActive(mTextView)) { 1461 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1462 // We are in extract mode and the content has changed 1463 // in some way... just report complete new text to the 1464 // input method. 1465 reportExtractedText(); 1466 } 1467 } 1468 } 1469 } 1470 1471 if (mCorrectionHighlighter != null) { 1472 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1473 } 1474 1475 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1476 drawCursor(canvas, cursorOffsetVertical); 1477 // Rely on the drawable entirely, do not draw the cursor line. 1478 // Has to be done after the IMM related code above which relies on the highlight. 1479 highlight = null; 1480 } 1481 1482 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1483 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1484 cursorOffsetVertical); 1485 } else { 1486 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1487 } 1488 } 1489 1490 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1491 Paint highlightPaint, int cursorOffsetVertical) { 1492 final long lineRange = layout.getLineRangeForDraw(canvas); 1493 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1494 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1495 if (lastLine < 0) return; 1496 1497 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1498 firstLine, lastLine); 1499 1500 if (layout instanceof DynamicLayout) { 1501 if (mTextRenderNodes == null) { 1502 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1503 } 1504 1505 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1506 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1507 int[] blockIndices = dynamicLayout.getBlockIndices(); 1508 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1509 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1510 1511 int endOfPreviousBlock = -1; 1512 int searchStartIndex = 0; 1513 for (int i = 0; i < numberOfBlocks; i++) { 1514 int blockEndLine = blockEndLines[i]; 1515 int blockIndex = blockIndices[i]; 1516 1517 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1518 if (blockIsInvalid) { 1519 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1520 searchStartIndex); 1521 // Note how dynamic layout's internal block indices get updated from Editor 1522 blockIndices[i] = blockIndex; 1523 if (mTextRenderNodes[blockIndex] != null) { 1524 mTextRenderNodes[blockIndex].isDirty = true; 1525 } 1526 searchStartIndex = blockIndex + 1; 1527 } 1528 1529 if (mTextRenderNodes[blockIndex] == null) { 1530 mTextRenderNodes[blockIndex] = 1531 new TextRenderNode("Text " + blockIndex); 1532 } 1533 1534 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1535 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1536 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1537 final int blockBeginLine = endOfPreviousBlock + 1; 1538 final int top = layout.getLineTop(blockBeginLine); 1539 final int bottom = layout.getLineBottom(blockEndLine); 1540 int left = 0; 1541 int right = mTextView.getWidth(); 1542 if (mTextView.getHorizontallyScrolling()) { 1543 float min = Float.MAX_VALUE; 1544 float max = Float.MIN_VALUE; 1545 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1546 min = Math.min(min, layout.getLineLeft(line)); 1547 max = Math.max(max, layout.getLineRight(line)); 1548 } 1549 left = (int) min; 1550 right = (int) (max + 0.5f); 1551 } 1552 1553 // Rebuild display list if it is invalid 1554 if (blockDisplayListIsInvalid) { 1555 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1556 right - left, bottom - top); 1557 try { 1558 // drawText is always relative to TextView's origin, this translation 1559 // brings this range of text back to the top left corner of the viewport 1560 displayListCanvas.translate(-left, -top); 1561 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1562 mTextRenderNodes[blockIndex].isDirty = false; 1563 // No need to untranslate, previous context is popped after 1564 // drawDisplayList 1565 } finally { 1566 blockDisplayList.end(displayListCanvas); 1567 // Same as drawDisplayList below, handled by our TextView's parent 1568 blockDisplayList.setClipToBounds(false); 1569 } 1570 } 1571 1572 // Valid disply list whose index is >= indexFirstChangedBlock 1573 // only needs to update its drawing location. 1574 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1575 } 1576 1577 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1578 1579 endOfPreviousBlock = blockEndLine; 1580 } 1581 1582 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1583 } else { 1584 // Boring layout is used for empty and hint text 1585 layout.drawText(canvas, firstLine, lastLine); 1586 } 1587 } 1588 1589 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1590 int searchStartIndex) { 1591 int length = mTextRenderNodes.length; 1592 for (int i = searchStartIndex; i < length; i++) { 1593 boolean blockIndexFound = false; 1594 for (int j = 0; j < numberOfBlocks; j++) { 1595 if (blockIndices[j] == i) { 1596 blockIndexFound = true; 1597 break; 1598 } 1599 } 1600 if (blockIndexFound) continue; 1601 return i; 1602 } 1603 1604 // No available index found, the pool has to grow 1605 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1606 return length; 1607 } 1608 1609 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1610 final boolean translate = cursorOffsetVertical != 0; 1611 if (translate) canvas.translate(0, cursorOffsetVertical); 1612 for (int i = 0; i < mCursorCount; i++) { 1613 mCursorDrawable[i].draw(canvas); 1614 } 1615 if (translate) canvas.translate(0, -cursorOffsetVertical); 1616 } 1617 1618 /** 1619 * Invalidates all the sub-display lists that overlap the specified character range 1620 */ 1621 void invalidateTextDisplayList(Layout layout, int start, int end) { 1622 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1623 final int firstLine = layout.getLineForOffset(start); 1624 final int lastLine = layout.getLineForOffset(end); 1625 1626 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1627 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1628 int[] blockIndices = dynamicLayout.getBlockIndices(); 1629 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1630 1631 int i = 0; 1632 // Skip the blocks before firstLine 1633 while (i < numberOfBlocks) { 1634 if (blockEndLines[i] >= firstLine) break; 1635 i++; 1636 } 1637 1638 // Invalidate all subsequent blocks until lastLine is passed 1639 while (i < numberOfBlocks) { 1640 final int blockIndex = blockIndices[i]; 1641 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1642 mTextRenderNodes[blockIndex].isDirty = true; 1643 } 1644 if (blockEndLines[i] >= lastLine) break; 1645 i++; 1646 } 1647 } 1648 } 1649 1650 void invalidateTextDisplayList() { 1651 if (mTextRenderNodes != null) { 1652 for (int i = 0; i < mTextRenderNodes.length; i++) { 1653 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1654 } 1655 } 1656 } 1657 1658 void updateCursorsPositions() { 1659 if (mTextView.mCursorDrawableRes == 0) { 1660 mCursorCount = 0; 1661 return; 1662 } 1663 1664 Layout layout = mTextView.getLayout(); 1665 Layout hintLayout = mTextView.getHintLayout(); 1666 final int offset = mTextView.getSelectionStart(); 1667 final int line = layout.getLineForOffset(offset); 1668 final int top = layout.getLineTop(line); 1669 final int bottom = layout.getLineTop(line + 1); 1670 1671 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1672 1673 int middle = bottom; 1674 if (mCursorCount == 2) { 1675 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1676 middle = (top + bottom) >> 1; 1677 } 1678 1679 boolean clamped = layout.shouldClampCursor(line); 1680 updateCursorPosition(0, top, middle, 1681 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1682 1683 if (mCursorCount == 2) { 1684 updateCursorPosition(1, middle, bottom, 1685 layout.getSecondaryHorizontal(offset, clamped)); 1686 } 1687 } 1688 1689 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1690 boolean clamped) { 1691 if (TextUtils.isEmpty(layout.getText()) && 1692 hintLayout != null && 1693 !TextUtils.isEmpty(hintLayout.getText())) { 1694 return hintLayout.getPrimaryHorizontal(offset, clamped); 1695 } else { 1696 return layout.getPrimaryHorizontal(offset, clamped); 1697 } 1698 } 1699 1700 /** 1701 * @return true if the selection mode was actually started. 1702 */ 1703 private boolean startSelectionActionModeWithoutSelection() { 1704 if (mSelectionActionMode != null) { 1705 // Selection action mode is already started 1706 // TODO: revisit invocations to minimize this case. 1707 mSelectionActionMode.invalidate(); 1708 return false; 1709 } 1710 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1711 mSelectionActionMode = mTextView.startActionMode( 1712 actionModeCallback, ActionMode.TYPE_FLOATING); 1713 return mSelectionActionMode != null; 1714 } 1715 1716 /** 1717 * Starts a Selection Action Mode with the current selection and enters drag mode. This should 1718 * be used whenever the mode is started from a touch event. 1719 * 1720 * @return true if the selection mode was actually started. 1721 */ 1722 private boolean startSelectionActionModeWithSelectionAndStartDrag() { 1723 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1724 if (selectionStarted) { 1725 getSelectionController().enterDrag(); 1726 } 1727 return selectionStarted; 1728 } 1729 1730 /** 1731 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1732 * are shown. This should be used when the mode is started from a non-touch event. 1733 * 1734 * @return true if the selection mode was actually started. 1735 */ 1736 boolean startSelectionActionModeWithSelection() { 1737 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1738 if (selectionStarted) { 1739 getSelectionController().show(); 1740 } 1741 return selectionStarted; 1742 } 1743 1744 private boolean startSelectionActionModeWithSelectionInternal() { 1745 if (mSelectionActionMode != null) { 1746 // Selection action mode is already started 1747 mSelectionActionMode.invalidate(); 1748 return false; 1749 } 1750 1751 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1752 Log.w(TextView.LOG_TAG, 1753 "TextView does not support text selection. Action mode cancelled."); 1754 return false; 1755 } 1756 1757 if (!mTextView.hasSelection()) { 1758 // There may already be a selection on device rotation 1759 if (!selectCurrentWord()) { 1760 // No word found under cursor or text selection not permitted. 1761 return false; 1762 } 1763 } 1764 1765 boolean willExtract = extractedTextModeWillBeStarted(); 1766 1767 // Do not start the action mode when extracted text will show up full screen, which would 1768 // immediately hide the newly created action bar and would be visually distracting. 1769 if (!willExtract) { 1770 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1771 mSelectionActionMode = mTextView.startActionMode( 1772 actionModeCallback, ActionMode.TYPE_FLOATING); 1773 } 1774 1775 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1776 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1777 // Show the IME to be able to replace text, except when selecting non editable text. 1778 final InputMethodManager imm = InputMethodManager.peekInstance(); 1779 if (imm != null) { 1780 imm.showSoftInput(mTextView, 0, null); 1781 } 1782 } 1783 return selectionStarted; 1784 } 1785 1786 private boolean extractedTextModeWillBeStarted() { 1787 if (!(mTextView instanceof ExtractEditText)) { 1788 final InputMethodManager imm = InputMethodManager.peekInstance(); 1789 return imm != null && imm.isFullscreenMode(); 1790 } 1791 return false; 1792 } 1793 1794 /** 1795 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1796 * the current cursor position or selection range. This method is consistent with the 1797 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1798 */ 1799 private boolean shouldOfferToShowSuggestions() { 1800 CharSequence text = mTextView.getText(); 1801 if (!(text instanceof Spannable)) return false; 1802 1803 final Spannable spannable = (Spannable) text; 1804 final int selectionStart = mTextView.getSelectionStart(); 1805 final int selectionEnd = mTextView.getSelectionEnd(); 1806 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1807 SuggestionSpan.class); 1808 if (suggestionSpans.length == 0) { 1809 return false; 1810 } 1811 if (selectionStart == selectionEnd) { 1812 // Spans overlap the cursor. 1813 return true; 1814 } 1815 int minSpanStart = mTextView.getText().length(); 1816 int maxSpanEnd = 0; 1817 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1818 int unionOfSpansCoveringSelectionStartEnd = 0; 1819 for (int i = 0; i < suggestionSpans.length; i++) { 1820 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1821 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1822 minSpanStart = Math.min(minSpanStart, spanStart); 1823 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1824 if (selectionStart < spanStart || selectionStart > spanEnd) { 1825 // The span doesn't cover the current selection start point. 1826 continue; 1827 } 1828 unionOfSpansCoveringSelectionStartStart = 1829 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1830 unionOfSpansCoveringSelectionStartEnd = 1831 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1832 } 1833 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1834 // No spans cover the selection start point. 1835 return false; 1836 } 1837 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1838 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1839 // There is a span that is not covered by the union. In this case, we soouldn't offer 1840 // to show suggestions as it's confusing. 1841 return false; 1842 } 1843 return true; 1844 } 1845 1846 /** 1847 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1848 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1849 */ 1850 private boolean isCursorInsideEasyCorrectionSpan() { 1851 Spannable spannable = (Spannable) mTextView.getText(); 1852 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1853 mTextView.getSelectionEnd(), SuggestionSpan.class); 1854 for (int i = 0; i < suggestionSpans.length; i++) { 1855 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1856 return true; 1857 } 1858 } 1859 return false; 1860 } 1861 1862 void onTouchUpEvent(MotionEvent event) { 1863 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1864 hideControllers(); 1865 CharSequence text = mTextView.getText(); 1866 if (!selectAllGotFocus && text.length() > 0) { 1867 // Move cursor 1868 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1869 Selection.setSelection((Spannable) text, offset); 1870 if (mSpellChecker != null) { 1871 // When the cursor moves, the word that was typed may need spell check 1872 mSpellChecker.onSelectionChanged(); 1873 } 1874 if (!extractedTextModeWillBeStarted()) { 1875 if (isCursorInsideEasyCorrectionSpan()) { 1876 mShowSuggestionRunnable = new Runnable() { 1877 public void run() { 1878 showSuggestions(); 1879 } 1880 }; 1881 // removeCallbacks is performed on every touch 1882 mTextView.postDelayed(mShowSuggestionRunnable, 1883 ViewConfiguration.getDoubleTapTimeout()); 1884 } else if (hasInsertionController()) { 1885 getInsertionController().show(); 1886 } 1887 } 1888 } 1889 } 1890 1891 protected void stopSelectionActionMode() { 1892 if (mSelectionActionMode != null) { 1893 // This will hide the mSelectionModifierCursorController 1894 mSelectionActionMode.finish(); 1895 } 1896 } 1897 1898 /** 1899 * @return True if this view supports insertion handles. 1900 */ 1901 boolean hasInsertionController() { 1902 return mInsertionControllerEnabled; 1903 } 1904 1905 /** 1906 * @return True if this view supports selection handles. 1907 */ 1908 boolean hasSelectionController() { 1909 return mSelectionControllerEnabled; 1910 } 1911 1912 InsertionPointCursorController getInsertionController() { 1913 if (!mInsertionControllerEnabled) { 1914 return null; 1915 } 1916 1917 if (mInsertionPointCursorController == null) { 1918 mInsertionPointCursorController = new InsertionPointCursorController(); 1919 1920 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1921 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1922 } 1923 1924 return mInsertionPointCursorController; 1925 } 1926 1927 SelectionModifierCursorController getSelectionController() { 1928 if (!mSelectionControllerEnabled) { 1929 return null; 1930 } 1931 1932 if (mSelectionModifierCursorController == null) { 1933 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1934 1935 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1936 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1937 } 1938 1939 return mSelectionModifierCursorController; 1940 } 1941 1942 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1943 if (mCursorDrawable[cursorIndex] == null) 1944 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1945 mTextView.mCursorDrawableRes); 1946 1947 if (mTempRect == null) mTempRect = new Rect(); 1948 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1949 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1950 horizontal = Math.max(0.5f, horizontal - 0.5f); 1951 final int left = (int) (horizontal) - mTempRect.left; 1952 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1953 bottom + mTempRect.bottom); 1954 } 1955 1956 /** 1957 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1958 * a dictionary) from the current input method, provided by it calling 1959 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1960 * implementation flashes the background of the corrected word to provide feedback to the user. 1961 * 1962 * @param info The auto correct info about the text that was corrected. 1963 */ 1964 public void onCommitCorrection(CorrectionInfo info) { 1965 if (mCorrectionHighlighter == null) { 1966 mCorrectionHighlighter = new CorrectionHighlighter(); 1967 } else { 1968 mCorrectionHighlighter.invalidate(false); 1969 } 1970 1971 mCorrectionHighlighter.highlight(info); 1972 } 1973 1974 void showSuggestions() { 1975 if (mSuggestionsPopupWindow == null) { 1976 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1977 } 1978 hideControllers(); 1979 mSuggestionsPopupWindow.show(); 1980 } 1981 1982 void onScrollChanged() { 1983 if (mPositionListener != null) { 1984 mPositionListener.onScrollChanged(); 1985 } 1986 if (mSelectionActionMode != null) { 1987 mSelectionActionMode.invalidateContentRect(); 1988 } 1989 } 1990 1991 /** 1992 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1993 */ 1994 private boolean shouldBlink() { 1995 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1996 1997 final int start = mTextView.getSelectionStart(); 1998 if (start < 0) return false; 1999 2000 final int end = mTextView.getSelectionEnd(); 2001 if (end < 0) return false; 2002 2003 return start == end; 2004 } 2005 2006 void makeBlink() { 2007 if (shouldBlink()) { 2008 mShowCursor = SystemClock.uptimeMillis(); 2009 if (mBlink == null) mBlink = new Blink(); 2010 mBlink.removeCallbacks(mBlink); 2011 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 2012 } else { 2013 if (mBlink != null) mBlink.removeCallbacks(mBlink); 2014 } 2015 } 2016 2017 private class Blink extends Handler implements Runnable { 2018 private boolean mCancelled; 2019 2020 public void run() { 2021 if (mCancelled) { 2022 return; 2023 } 2024 2025 removeCallbacks(Blink.this); 2026 2027 if (shouldBlink()) { 2028 if (mTextView.getLayout() != null) { 2029 mTextView.invalidateCursorPath(); 2030 } 2031 2032 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 2033 } 2034 } 2035 2036 void cancel() { 2037 if (!mCancelled) { 2038 removeCallbacks(Blink.this); 2039 mCancelled = true; 2040 } 2041 } 2042 2043 void uncancel() { 2044 mCancelled = false; 2045 } 2046 } 2047 2048 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 2049 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2050 com.android.internal.R.layout.text_drag_thumbnail, null); 2051 2052 if (shadowView == null) { 2053 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2054 } 2055 2056 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2057 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2058 } 2059 shadowView.setText(text); 2060 shadowView.setTextColor(mTextView.getTextColors()); 2061 2062 shadowView.setTextAppearance(mTextView.getContext(), R.styleable.Theme_textAppearanceLarge); 2063 shadowView.setGravity(Gravity.CENTER); 2064 2065 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2066 ViewGroup.LayoutParams.WRAP_CONTENT)); 2067 2068 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2069 shadowView.measure(size, size); 2070 2071 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2072 shadowView.invalidate(); 2073 return new DragShadowBuilder(shadowView); 2074 } 2075 2076 private static class DragLocalState { 2077 public TextView sourceTextView; 2078 public int start, end; 2079 2080 public DragLocalState(TextView sourceTextView, int start, int end) { 2081 this.sourceTextView = sourceTextView; 2082 this.start = start; 2083 this.end = end; 2084 } 2085 } 2086 2087 void onDrop(DragEvent event) { 2088 StringBuilder content = new StringBuilder(""); 2089 ClipData clipData = event.getClipData(); 2090 final int itemCount = clipData.getItemCount(); 2091 for (int i=0; i < itemCount; i++) { 2092 Item item = clipData.getItemAt(i); 2093 content.append(item.coerceToStyledText(mTextView.getContext())); 2094 } 2095 2096 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2097 2098 Object localState = event.getLocalState(); 2099 DragLocalState dragLocalState = null; 2100 if (localState instanceof DragLocalState) { 2101 dragLocalState = (DragLocalState) localState; 2102 } 2103 boolean dragDropIntoItself = dragLocalState != null && 2104 dragLocalState.sourceTextView == mTextView; 2105 2106 if (dragDropIntoItself) { 2107 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2108 // A drop inside the original selection discards the drop. 2109 return; 2110 } 2111 } 2112 2113 final int originalLength = mTextView.getText().length(); 2114 int min = offset; 2115 int max = offset; 2116 2117 Selection.setSelection((Spannable) mTextView.getText(), max); 2118 mTextView.replaceText_internal(min, max, content); 2119 2120 if (dragDropIntoItself) { 2121 int dragSourceStart = dragLocalState.start; 2122 int dragSourceEnd = dragLocalState.end; 2123 if (max <= dragSourceStart) { 2124 // Inserting text before selection has shifted positions 2125 final int shift = mTextView.getText().length() - originalLength; 2126 dragSourceStart += shift; 2127 dragSourceEnd += shift; 2128 } 2129 2130 // Delete original selection 2131 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2132 2133 // Make sure we do not leave two adjacent spaces. 2134 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2135 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2136 if (nextCharIdx > prevCharIdx + 1) { 2137 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2138 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2139 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2140 } 2141 } 2142 } 2143 } 2144 2145 public void addSpanWatchers(Spannable text) { 2146 final int textLength = text.length(); 2147 2148 if (mKeyListener != null) { 2149 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2150 } 2151 2152 if (mSpanController == null) { 2153 mSpanController = new SpanController(); 2154 } 2155 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2156 } 2157 2158 /** 2159 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2160 * pop-up should be displayed. 2161 * Also monitors {@link Selection} to call back to the attached input method. 2162 */ 2163 class SpanController implements SpanWatcher { 2164 2165 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2166 2167 private EasyEditPopupWindow mPopupWindow; 2168 2169 private Runnable mHidePopup; 2170 2171 // This function is pure but inner classes can't have static functions 2172 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2173 final Object span) { 2174 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2175 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2176 } 2177 2178 @Override 2179 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2180 if (isNonIntermediateSelectionSpan(text, span)) { 2181 sendUpdateSelection(); 2182 } else if (span instanceof EasyEditSpan) { 2183 if (mPopupWindow == null) { 2184 mPopupWindow = new EasyEditPopupWindow(); 2185 mHidePopup = new Runnable() { 2186 @Override 2187 public void run() { 2188 hide(); 2189 } 2190 }; 2191 } 2192 2193 // Make sure there is only at most one EasyEditSpan in the text 2194 if (mPopupWindow.mEasyEditSpan != null) { 2195 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2196 } 2197 2198 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2199 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2200 @Override 2201 public void onDeleteClick(EasyEditSpan span) { 2202 Editable editable = (Editable) mTextView.getText(); 2203 int start = editable.getSpanStart(span); 2204 int end = editable.getSpanEnd(span); 2205 if (start >= 0 && end >= 0) { 2206 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2207 mTextView.deleteText_internal(start, end); 2208 } 2209 editable.removeSpan(span); 2210 } 2211 }); 2212 2213 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2214 // The window is not visible yet, ignore the text change. 2215 return; 2216 } 2217 2218 if (mTextView.getLayout() == null) { 2219 // The view has not been laid out yet, ignore the text change 2220 return; 2221 } 2222 2223 if (extractedTextModeWillBeStarted()) { 2224 // The input is in extract mode. Do not handle the easy edit in 2225 // the original TextView, as the ExtractEditText will do 2226 return; 2227 } 2228 2229 mPopupWindow.show(); 2230 mTextView.removeCallbacks(mHidePopup); 2231 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2232 } 2233 } 2234 2235 @Override 2236 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2237 if (isNonIntermediateSelectionSpan(text, span)) { 2238 sendUpdateSelection(); 2239 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2240 hide(); 2241 } 2242 } 2243 2244 @Override 2245 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2246 int newStart, int newEnd) { 2247 if (isNonIntermediateSelectionSpan(text, span)) { 2248 sendUpdateSelection(); 2249 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2250 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2251 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2252 text.removeSpan(easyEditSpan); 2253 } 2254 } 2255 2256 public void hide() { 2257 if (mPopupWindow != null) { 2258 mPopupWindow.hide(); 2259 mTextView.removeCallbacks(mHidePopup); 2260 } 2261 } 2262 2263 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2264 try { 2265 PendingIntent pendingIntent = span.getPendingIntent(); 2266 if (pendingIntent != null) { 2267 Intent intent = new Intent(); 2268 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2269 pendingIntent.send(mTextView.getContext(), 0, intent); 2270 } 2271 } catch (CanceledException e) { 2272 // This should not happen, as we should try to send the intent only once. 2273 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2274 } 2275 } 2276 } 2277 2278 /** 2279 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2280 */ 2281 private interface EasyEditDeleteListener { 2282 2283 /** 2284 * Clicks the delete pop-up. 2285 */ 2286 void onDeleteClick(EasyEditSpan span); 2287 } 2288 2289 /** 2290 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2291 * by {@link SpanController}. 2292 */ 2293 private class EasyEditPopupWindow extends PinnedPopupWindow 2294 implements OnClickListener { 2295 private static final int POPUP_TEXT_LAYOUT = 2296 com.android.internal.R.layout.text_edit_action_popup_text; 2297 private TextView mDeleteTextView; 2298 private EasyEditSpan mEasyEditSpan; 2299 private EasyEditDeleteListener mOnDeleteListener; 2300 2301 @Override 2302 protected void createPopupWindow() { 2303 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2304 com.android.internal.R.attr.textSelectHandleWindowStyle); 2305 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2306 mPopupWindow.setClippingEnabled(true); 2307 } 2308 2309 @Override 2310 protected void initContentView() { 2311 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2312 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2313 mContentView = linearLayout; 2314 mContentView.setBackgroundResource( 2315 com.android.internal.R.drawable.text_edit_side_paste_window); 2316 2317 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2318 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2319 2320 LayoutParams wrapContent = new LayoutParams( 2321 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2322 2323 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2324 mDeleteTextView.setLayoutParams(wrapContent); 2325 mDeleteTextView.setText(com.android.internal.R.string.delete); 2326 mDeleteTextView.setOnClickListener(this); 2327 mContentView.addView(mDeleteTextView); 2328 } 2329 2330 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2331 mEasyEditSpan = easyEditSpan; 2332 } 2333 2334 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2335 mOnDeleteListener = listener; 2336 } 2337 2338 @Override 2339 public void onClick(View view) { 2340 if (view == mDeleteTextView 2341 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2342 && mOnDeleteListener != null) { 2343 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2344 } 2345 } 2346 2347 @Override 2348 public void hide() { 2349 if (mEasyEditSpan != null) { 2350 mEasyEditSpan.setDeleteEnabled(false); 2351 } 2352 mOnDeleteListener = null; 2353 super.hide(); 2354 } 2355 2356 @Override 2357 protected int getTextOffset() { 2358 // Place the pop-up at the end of the span 2359 Editable editable = (Editable) mTextView.getText(); 2360 return editable.getSpanEnd(mEasyEditSpan); 2361 } 2362 2363 @Override 2364 protected int getVerticalLocalPosition(int line) { 2365 return mTextView.getLayout().getLineBottom(line); 2366 } 2367 2368 @Override 2369 protected int clipVertically(int positionY) { 2370 // As we display the pop-up below the span, no vertical clipping is required. 2371 return positionY; 2372 } 2373 } 2374 2375 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2376 // 3 handles 2377 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2378 // 1 CursorAnchorInfoNotifier 2379 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2380 private TextViewPositionListener[] mPositionListeners = 2381 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2382 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2383 private boolean mPositionHasChanged = true; 2384 // Absolute position of the TextView with respect to its parent window 2385 private int mPositionX, mPositionY; 2386 private int mNumberOfListeners; 2387 private boolean mScrollHasChanged; 2388 final int[] mTempCoords = new int[2]; 2389 2390 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2391 if (mNumberOfListeners == 0) { 2392 updatePosition(); 2393 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2394 vto.addOnPreDrawListener(this); 2395 } 2396 2397 int emptySlotIndex = -1; 2398 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2399 TextViewPositionListener listener = mPositionListeners[i]; 2400 if (listener == positionListener) { 2401 return; 2402 } else if (emptySlotIndex < 0 && listener == null) { 2403 emptySlotIndex = i; 2404 } 2405 } 2406 2407 mPositionListeners[emptySlotIndex] = positionListener; 2408 mCanMove[emptySlotIndex] = canMove; 2409 mNumberOfListeners++; 2410 } 2411 2412 public void removeSubscriber(TextViewPositionListener positionListener) { 2413 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2414 if (mPositionListeners[i] == positionListener) { 2415 mPositionListeners[i] = null; 2416 mNumberOfListeners--; 2417 break; 2418 } 2419 } 2420 2421 if (mNumberOfListeners == 0) { 2422 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2423 vto.removeOnPreDrawListener(this); 2424 } 2425 } 2426 2427 public int getPositionX() { 2428 return mPositionX; 2429 } 2430 2431 public int getPositionY() { 2432 return mPositionY; 2433 } 2434 2435 @Override 2436 public boolean onPreDraw() { 2437 updatePosition(); 2438 2439 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2440 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2441 TextViewPositionListener positionListener = mPositionListeners[i]; 2442 if (positionListener != null) { 2443 positionListener.updatePosition(mPositionX, mPositionY, 2444 mPositionHasChanged, mScrollHasChanged); 2445 } 2446 } 2447 } 2448 2449 mScrollHasChanged = false; 2450 return true; 2451 } 2452 2453 private void updatePosition() { 2454 mTextView.getLocationInWindow(mTempCoords); 2455 2456 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2457 2458 mPositionX = mTempCoords[0]; 2459 mPositionY = mTempCoords[1]; 2460 } 2461 2462 public void onScrollChanged() { 2463 mScrollHasChanged = true; 2464 } 2465 } 2466 2467 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2468 protected PopupWindow mPopupWindow; 2469 protected ViewGroup mContentView; 2470 int mPositionX, mPositionY; 2471 2472 protected abstract void createPopupWindow(); 2473 protected abstract void initContentView(); 2474 protected abstract int getTextOffset(); 2475 protected abstract int getVerticalLocalPosition(int line); 2476 protected abstract int clipVertically(int positionY); 2477 2478 public PinnedPopupWindow() { 2479 createPopupWindow(); 2480 2481 mPopupWindow.setWindowLayoutType( 2482 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2483 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2484 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2485 2486 initContentView(); 2487 2488 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2489 ViewGroup.LayoutParams.WRAP_CONTENT); 2490 mContentView.setLayoutParams(wrapContent); 2491 2492 mPopupWindow.setContentView(mContentView); 2493 } 2494 2495 public void show() { 2496 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2497 2498 computeLocalPosition(); 2499 2500 final PositionListener positionListener = getPositionListener(); 2501 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2502 } 2503 2504 protected void measureContent() { 2505 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2506 mContentView.measure( 2507 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2508 View.MeasureSpec.AT_MOST), 2509 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2510 View.MeasureSpec.AT_MOST)); 2511 } 2512 2513 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2514 * positioned according to viewportToContentHorizontalOffset. 2515 * 2516 * This method assumes that mContentView has properly been measured from its content. */ 2517 private void computeLocalPosition() { 2518 measureContent(); 2519 final int width = mContentView.getMeasuredWidth(); 2520 final int offset = getTextOffset(); 2521 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2522 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2523 2524 final int line = mTextView.getLayout().getLineForOffset(offset); 2525 mPositionY = getVerticalLocalPosition(line); 2526 mPositionY += mTextView.viewportToContentVerticalOffset(); 2527 } 2528 2529 private void updatePosition(int parentPositionX, int parentPositionY) { 2530 int positionX = parentPositionX + mPositionX; 2531 int positionY = parentPositionY + mPositionY; 2532 2533 positionY = clipVertically(positionY); 2534 2535 // Horizontal clipping 2536 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2537 final int width = mContentView.getMeasuredWidth(); 2538 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2539 positionX = Math.max(0, positionX); 2540 2541 if (isShowing()) { 2542 mPopupWindow.update(positionX, positionY, -1, -1); 2543 } else { 2544 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2545 positionX, positionY); 2546 } 2547 } 2548 2549 public void hide() { 2550 mPopupWindow.dismiss(); 2551 getPositionListener().removeSubscriber(this); 2552 } 2553 2554 @Override 2555 public void updatePosition(int parentPositionX, int parentPositionY, 2556 boolean parentPositionChanged, boolean parentScrolled) { 2557 // Either parentPositionChanged or parentScrolled is true, check if still visible 2558 if (isShowing() && isOffsetVisible(getTextOffset())) { 2559 if (parentScrolled) computeLocalPosition(); 2560 updatePosition(parentPositionX, parentPositionY); 2561 } else { 2562 hide(); 2563 } 2564 } 2565 2566 public boolean isShowing() { 2567 return mPopupWindow.isShowing(); 2568 } 2569 } 2570 2571 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2572 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2573 private static final int ADD_TO_DICTIONARY = -1; 2574 private static final int DELETE_TEXT = -2; 2575 private SuggestionInfo[] mSuggestionInfos; 2576 private int mNumberOfSuggestions; 2577 private boolean mCursorWasVisibleBeforeSuggestions; 2578 private boolean mIsShowingUp = false; 2579 private SuggestionAdapter mSuggestionsAdapter; 2580 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2581 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2582 2583 private class CustomPopupWindow extends PopupWindow { 2584 public CustomPopupWindow(Context context, int defStyleAttr) { 2585 super(context, null, defStyleAttr); 2586 } 2587 2588 @Override 2589 public void dismiss() { 2590 super.dismiss(); 2591 2592 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2593 2594 // Safe cast since show() checks that mTextView.getText() is an Editable 2595 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2596 2597 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2598 if (hasInsertionController()) { 2599 getInsertionController().show(); 2600 } 2601 } 2602 } 2603 2604 public SuggestionsPopupWindow() { 2605 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2606 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2607 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2608 } 2609 2610 @Override 2611 protected void createPopupWindow() { 2612 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2613 com.android.internal.R.attr.textSuggestionsWindowStyle); 2614 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2615 mPopupWindow.setFocusable(true); 2616 mPopupWindow.setClippingEnabled(false); 2617 } 2618 2619 @Override 2620 protected void initContentView() { 2621 ListView listView = new ListView(mTextView.getContext()); 2622 mSuggestionsAdapter = new SuggestionAdapter(); 2623 listView.setAdapter(mSuggestionsAdapter); 2624 listView.setOnItemClickListener(this); 2625 mContentView = listView; 2626 2627 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2628 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2629 for (int i = 0; i < mSuggestionInfos.length; i++) { 2630 mSuggestionInfos[i] = new SuggestionInfo(); 2631 } 2632 } 2633 2634 public boolean isShowingUp() { 2635 return mIsShowingUp; 2636 } 2637 2638 public void onParentLostFocus() { 2639 mIsShowingUp = false; 2640 } 2641 2642 private class SuggestionInfo { 2643 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2644 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2645 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2646 SpannableStringBuilder text = new SpannableStringBuilder(); 2647 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2648 android.R.style.TextAppearance_SuggestionHighlight); 2649 } 2650 2651 private class SuggestionAdapter extends BaseAdapter { 2652 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2653 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2654 2655 @Override 2656 public int getCount() { 2657 return mNumberOfSuggestions; 2658 } 2659 2660 @Override 2661 public Object getItem(int position) { 2662 return mSuggestionInfos[position]; 2663 } 2664 2665 @Override 2666 public long getItemId(int position) { 2667 return position; 2668 } 2669 2670 @Override 2671 public View getView(int position, View convertView, ViewGroup parent) { 2672 TextView textView = (TextView) convertView; 2673 2674 if (textView == null) { 2675 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2676 parent, false); 2677 } 2678 2679 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2680 textView.setText(suggestionInfo.text); 2681 2682 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2683 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2684 textView.setBackgroundColor(Color.TRANSPARENT); 2685 } else { 2686 textView.setBackgroundColor(Color.WHITE); 2687 } 2688 2689 return textView; 2690 } 2691 } 2692 2693 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2694 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2695 final int flag1 = span1.getFlags(); 2696 final int flag2 = span2.getFlags(); 2697 if (flag1 != flag2) { 2698 // The order here should match what is used in updateDrawState 2699 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2700 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2701 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2702 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2703 if (easy1 && !misspelled1) return -1; 2704 if (easy2 && !misspelled2) return 1; 2705 if (misspelled1) return -1; 2706 if (misspelled2) return 1; 2707 } 2708 2709 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2710 } 2711 } 2712 2713 /** 2714 * Returns the suggestion spans that cover the current cursor position. The suggestion 2715 * spans are sorted according to the length of text that they are attached to. 2716 */ 2717 private SuggestionSpan[] getSuggestionSpans() { 2718 int pos = mTextView.getSelectionStart(); 2719 Spannable spannable = (Spannable) mTextView.getText(); 2720 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2721 2722 mSpansLengths.clear(); 2723 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2724 int start = spannable.getSpanStart(suggestionSpan); 2725 int end = spannable.getSpanEnd(suggestionSpan); 2726 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2727 } 2728 2729 // The suggestions are sorted according to their types (easy correction first, then 2730 // misspelled) and to the length of the text that they cover (shorter first). 2731 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2732 return suggestionSpans; 2733 } 2734 2735 @Override 2736 public void show() { 2737 if (!(mTextView.getText() instanceof Editable)) return; 2738 2739 if (updateSuggestions()) { 2740 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2741 mTextView.setCursorVisible(false); 2742 mIsShowingUp = true; 2743 super.show(); 2744 } 2745 } 2746 2747 @Override 2748 protected void measureContent() { 2749 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2750 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2751 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2752 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2753 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2754 2755 int width = 0; 2756 View view = null; 2757 for (int i = 0; i < mNumberOfSuggestions; i++) { 2758 view = mSuggestionsAdapter.getView(i, view, mContentView); 2759 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2760 view.measure(horizontalMeasure, verticalMeasure); 2761 width = Math.max(width, view.getMeasuredWidth()); 2762 } 2763 2764 // Enforce the width based on actual text widths 2765 mContentView.measure( 2766 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2767 verticalMeasure); 2768 2769 Drawable popupBackground = mPopupWindow.getBackground(); 2770 if (popupBackground != null) { 2771 if (mTempRect == null) mTempRect = new Rect(); 2772 popupBackground.getPadding(mTempRect); 2773 width += mTempRect.left + mTempRect.right; 2774 } 2775 mPopupWindow.setWidth(width); 2776 } 2777 2778 @Override 2779 protected int getTextOffset() { 2780 return mTextView.getSelectionStart(); 2781 } 2782 2783 @Override 2784 protected int getVerticalLocalPosition(int line) { 2785 return mTextView.getLayout().getLineBottom(line); 2786 } 2787 2788 @Override 2789 protected int clipVertically(int positionY) { 2790 final int height = mContentView.getMeasuredHeight(); 2791 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2792 return Math.min(positionY, displayMetrics.heightPixels - height); 2793 } 2794 2795 @Override 2796 public void hide() { 2797 super.hide(); 2798 } 2799 2800 private boolean updateSuggestions() { 2801 Spannable spannable = (Spannable) mTextView.getText(); 2802 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2803 2804 final int nbSpans = suggestionSpans.length; 2805 // Suggestions are shown after a delay: the underlying spans may have been removed 2806 if (nbSpans == 0) return false; 2807 2808 mNumberOfSuggestions = 0; 2809 int spanUnionStart = mTextView.getText().length(); 2810 int spanUnionEnd = 0; 2811 2812 SuggestionSpan misspelledSpan = null; 2813 int underlineColor = 0; 2814 2815 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2816 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2817 final int spanStart = spannable.getSpanStart(suggestionSpan); 2818 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2819 spanUnionStart = Math.min(spanStart, spanUnionStart); 2820 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2821 2822 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2823 misspelledSpan = suggestionSpan; 2824 } 2825 2826 // The first span dictates the background color of the highlighted text 2827 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2828 2829 String[] suggestions = suggestionSpan.getSuggestions(); 2830 int nbSuggestions = suggestions.length; 2831 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2832 String suggestion = suggestions[suggestionIndex]; 2833 2834 boolean suggestionIsDuplicate = false; 2835 for (int i = 0; i < mNumberOfSuggestions; i++) { 2836 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2837 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2838 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2839 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2840 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2841 suggestionIsDuplicate = true; 2842 break; 2843 } 2844 } 2845 } 2846 2847 if (!suggestionIsDuplicate) { 2848 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2849 suggestionInfo.suggestionSpan = suggestionSpan; 2850 suggestionInfo.suggestionIndex = suggestionIndex; 2851 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2852 2853 mNumberOfSuggestions++; 2854 2855 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2856 // Also end outer for loop 2857 spanIndex = nbSpans; 2858 break; 2859 } 2860 } 2861 } 2862 } 2863 2864 for (int i = 0; i < mNumberOfSuggestions; i++) { 2865 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2866 } 2867 2868 // Add "Add to dictionary" item if there is a span with the misspelled flag 2869 if (misspelledSpan != null) { 2870 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2871 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2872 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2873 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2874 suggestionInfo.suggestionSpan = misspelledSpan; 2875 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2876 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2877 getContext().getString(com.android.internal.R.string.addToDictionary)); 2878 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2879 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2880 2881 mNumberOfSuggestions++; 2882 } 2883 } 2884 2885 // Delete item 2886 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2887 suggestionInfo.suggestionSpan = null; 2888 suggestionInfo.suggestionIndex = DELETE_TEXT; 2889 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2890 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2891 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2892 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2893 mNumberOfSuggestions++; 2894 2895 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2896 if (underlineColor == 0) { 2897 // Fallback on the default highlight color when the first span does not provide one 2898 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2899 } else { 2900 final float BACKGROUND_TRANSPARENCY = 0.4f; 2901 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2902 mSuggestionRangeSpan.setBackgroundColor( 2903 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2904 } 2905 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2906 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2907 2908 mSuggestionsAdapter.notifyDataSetChanged(); 2909 return true; 2910 } 2911 2912 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2913 int unionEnd) { 2914 final Spannable text = (Spannable) mTextView.getText(); 2915 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2916 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2917 2918 // Adjust the start/end of the suggestion span 2919 suggestionInfo.suggestionStart = spanStart - unionStart; 2920 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2921 + suggestionInfo.text.length(); 2922 2923 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2924 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2925 2926 // Add the text before and after the span. 2927 final String textAsString = text.toString(); 2928 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2929 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2930 } 2931 2932 @Override 2933 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2934 Editable editable = (Editable) mTextView.getText(); 2935 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2936 2937 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2938 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2939 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2940 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2941 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2942 if (spanUnionEnd < editable.length() && 2943 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2944 (spanUnionStart == 0 || 2945 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2946 spanUnionEnd = spanUnionEnd + 1; 2947 } 2948 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2949 } 2950 hide(); 2951 return; 2952 } 2953 2954 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2955 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2956 if (spanStart < 0 || spanEnd <= spanStart) { 2957 // Span has been removed 2958 hide(); 2959 return; 2960 } 2961 2962 final String originalText = editable.toString().substring(spanStart, spanEnd); 2963 2964 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2965 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2966 intent.putExtra("word", originalText); 2967 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2968 // Put a listener to replace the original text with a word which the user 2969 // modified in a user dictionary dialog. 2970 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2971 mTextView.getContext().startActivity(intent); 2972 // There is no way to know if the word was indeed added. Re-check. 2973 // TODO The ExtractEditText should remove the span in the original text instead 2974 editable.removeSpan(suggestionInfo.suggestionSpan); 2975 Selection.setSelection(editable, spanEnd); 2976 updateSpellCheckSpans(spanStart, spanEnd, false); 2977 } else { 2978 // SuggestionSpans are removed by replace: save them before 2979 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2980 SuggestionSpan.class); 2981 final int length = suggestionSpans.length; 2982 int[] suggestionSpansStarts = new int[length]; 2983 int[] suggestionSpansEnds = new int[length]; 2984 int[] suggestionSpansFlags = new int[length]; 2985 for (int i = 0; i < length; i++) { 2986 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2987 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2988 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2989 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2990 2991 // Remove potential misspelled flags 2992 int suggestionSpanFlags = suggestionSpan.getFlags(); 2993 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2994 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2995 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2996 suggestionSpan.setFlags(suggestionSpanFlags); 2997 } 2998 } 2999 3000 final int suggestionStart = suggestionInfo.suggestionStart; 3001 final int suggestionEnd = suggestionInfo.suggestionEnd; 3002 final String suggestion = suggestionInfo.text.subSequence( 3003 suggestionStart, suggestionEnd).toString(); 3004 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 3005 3006 // Notify source IME of the suggestion pick. Do this before 3007 // swaping texts. 3008 suggestionInfo.suggestionSpan.notifySelection( 3009 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 3010 3011 // Swap text content between actual text and Suggestion span 3012 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 3013 suggestions[suggestionInfo.suggestionIndex] = originalText; 3014 3015 // Restore previous SuggestionSpans 3016 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 3017 for (int i = 0; i < length; i++) { 3018 // Only spans that include the modified region make sense after replacement 3019 // Spans partially included in the replaced region are removed, there is no 3020 // way to assign them a valid range after replacement 3021 if (suggestionSpansStarts[i] <= spanStart && 3022 suggestionSpansEnds[i] >= spanEnd) { 3023 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 3024 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 3025 } 3026 } 3027 3028 // Move cursor at the end of the replaced word 3029 final int newCursorPosition = spanEnd + lengthDifference; 3030 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 3031 } 3032 3033 hide(); 3034 } 3035 } 3036 3037 /** 3038 * An ActionMode Callback class that is used to provide actions while in text selection mode. 3039 * 3040 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 3041 * on which of these this TextView supports. 3042 */ 3043 private class SelectionActionModeCallback extends ActionMode.Callback2 { 3044 private final Path mSelectionPath = new Path(); 3045 private final RectF mSelectionBounds = new RectF(); 3046 3047 private int mSelectionHandleHeight; 3048 private int mInsertionHandleHeight; 3049 3050 public SelectionActionModeCallback() { 3051 SelectionModifierCursorController selectionController = getSelectionController(); 3052 if (selectionController.mStartHandle == null) { 3053 // As these are for initializing selectionController, hide() must be called. 3054 selectionController.initDrawables(); 3055 selectionController.initHandles(); 3056 selectionController.hide(); 3057 } 3058 mSelectionHandleHeight = Math.max( 3059 mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight()); 3060 InsertionPointCursorController insertionController = getInsertionController(); 3061 if (insertionController != null) { 3062 insertionController.getHandle(); 3063 mInsertionHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3064 } 3065 } 3066 3067 @Override 3068 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3069 mode.setTitle(mTextView.getContext().getString( 3070 com.android.internal.R.string.textSelectionCABTitle)); 3071 mode.setSubtitle(null); 3072 mode.setTitleOptionalHint(true); 3073 populateMenuWithItems(menu); 3074 3075 if (mCustomSelectionActionModeCallback != null) { 3076 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 3077 // The custom mode can choose to cancel the action mode 3078 return false; 3079 } 3080 } 3081 3082 addIntentMenuItemsForTextProcessing(menu); 3083 3084 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3085 mTextView.setHasTransientState(true); 3086 return true; 3087 } else { 3088 return false; 3089 } 3090 } 3091 3092 private void populateMenuWithItems(Menu menu) { 3093 if (mTextView.canCut()) { 3094 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 3095 setAlphabeticShortcut('x'). 3096 setShowAsAction( 3097 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3098 } 3099 3100 if (mTextView.canCopy()) { 3101 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 3102 setAlphabeticShortcut('c'). 3103 setShowAsAction( 3104 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3105 } 3106 3107 if (mTextView.canPaste()) { 3108 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 3109 setAlphabeticShortcut('v'). 3110 setShowAsAction( 3111 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3112 } 3113 3114 if (mTextView.canShare()) { 3115 menu.add(0, TextView.ID_SHARE, 0, com.android.internal.R.string.share). 3116 setShowAsAction( 3117 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3118 } 3119 3120 if (mTextView.canSelectAllText()) { 3121 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 3122 setAlphabeticShortcut('a'). 3123 setShowAsAction( 3124 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3125 } 3126 3127 updateReplaceItem(menu); 3128 } 3129 3130 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3131 if (mTextView.canProcessText()) { 3132 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3133 List<ResolveInfo> supportedActivities = 3134 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3135 for (ResolveInfo info : supportedActivities) { 3136 menu.add(info.loadLabel(packageManager)) 3137 .setIntent(createProcessTextIntentForResolveInfo(info)) 3138 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM 3139 | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3140 } 3141 } 3142 } 3143 3144 private Intent createProcessTextIntent() { 3145 return new Intent() 3146 .setAction(Intent.ACTION_PROCESS_TEXT) 3147 .setType("text/plain"); 3148 } 3149 3150 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3151 return createProcessTextIntent() 3152 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3153 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3154 } 3155 3156 @Override 3157 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3158 updateReplaceItem(menu); 3159 3160 if (mCustomSelectionActionModeCallback != null) { 3161 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3162 } 3163 return true; 3164 } 3165 3166 private void updateReplaceItem(Menu menu) { 3167 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3168 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3169 if (canReplace && !replaceItemExists) { 3170 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 3171 setShowAsAction( 3172 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3173 } else if (!canReplace && replaceItemExists) { 3174 menu.removeItem(TextView.ID_REPLACE); 3175 } 3176 } 3177 3178 @Override 3179 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3180 if (item.getIntent() != null 3181 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3182 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3183 mPreserveDetachedSelection = true; 3184 mTextView.startActivityForResult( 3185 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3186 return true; 3187 } 3188 if (mCustomSelectionActionModeCallback != null && 3189 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3190 return true; 3191 } 3192 if (item.getItemId() == TextView.ID_REPLACE) { 3193 onReplace(); 3194 return true; 3195 } 3196 return mTextView.onTextContextMenuItem(item.getItemId()); 3197 } 3198 3199 @Override 3200 public void onDestroyActionMode(ActionMode mode) { 3201 if (mCustomSelectionActionModeCallback != null) { 3202 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3203 } 3204 3205 /* 3206 * If we're ending this mode because we're detaching from a window, 3207 * we still have selection state to preserve. Don't clear it, we'll 3208 * bring back the selection mode when (if) we get reattached. 3209 */ 3210 if (!mPreserveDetachedSelection) { 3211 Selection.setSelection((Spannable) mTextView.getText(), 3212 mTextView.getSelectionEnd()); 3213 mTextView.setHasTransientState(false); 3214 } 3215 3216 if (mSelectionModifierCursorController != null) { 3217 mSelectionModifierCursorController.hide(); 3218 } 3219 3220 mSelectionActionMode = null; 3221 } 3222 3223 @Override 3224 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3225 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3226 super.onGetContentRect(mode, view, outRect); 3227 return; 3228 } 3229 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3230 // We have a selection. 3231 mSelectionPath.reset(); 3232 mTextView.getLayout().getSelectionPath( 3233 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3234 mSelectionPath.computeBounds(mSelectionBounds, true); 3235 mSelectionBounds.bottom += mSelectionHandleHeight; 3236 } else if (mCursorCount == 2) { 3237 // We have a split cursor. In this case, we take the rectangle that includes both 3238 // parts of the cursor to ensure we don't obscure either of them. 3239 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3240 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3241 mSelectionBounds.set( 3242 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3243 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3244 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3245 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3246 + mInsertionHandleHeight); 3247 } else { 3248 // We have a single cursor. 3249 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3250 float primaryHorizontal = 3251 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3252 mSelectionBounds.set( 3253 primaryHorizontal, 3254 mTextView.getLayout().getLineTop(line), 3255 primaryHorizontal + 1, 3256 mTextView.getLayout().getLineTop(line + 1) + mInsertionHandleHeight); 3257 } 3258 // Take TextView's padding and scroll into account. 3259 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3260 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3261 outRect.set( 3262 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3263 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3264 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3265 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3266 } 3267 } 3268 3269 private void onReplace() { 3270 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3271 stopSelectionActionMode(); 3272 Selection.setSelection((Spannable) mTextView.getText(), middle); 3273 showSuggestions(); 3274 } 3275 3276 /** 3277 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3278 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3279 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3280 */ 3281 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3282 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3283 final int[] mTmpIntOffset = new int[2]; 3284 final Matrix mViewToScreenMatrix = new Matrix(); 3285 3286 @Override 3287 public void updatePosition(int parentPositionX, int parentPositionY, 3288 boolean parentPositionChanged, boolean parentScrolled) { 3289 final InputMethodState ims = mInputMethodState; 3290 if (ims == null || ims.mBatchEditNesting > 0) { 3291 return; 3292 } 3293 final InputMethodManager imm = InputMethodManager.peekInstance(); 3294 if (null == imm) { 3295 return; 3296 } 3297 if (!imm.isActive(mTextView)) { 3298 return; 3299 } 3300 // Skip if the IME has not requested the cursor/anchor position. 3301 if (!imm.isCursorAnchorInfoEnabled()) { 3302 return; 3303 } 3304 Layout layout = mTextView.getLayout(); 3305 if (layout == null) { 3306 return; 3307 } 3308 3309 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3310 builder.reset(); 3311 3312 final int selectionStart = mTextView.getSelectionStart(); 3313 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3314 3315 // Construct transformation matrix from view local coordinates to screen coordinates. 3316 mViewToScreenMatrix.set(mTextView.getMatrix()); 3317 mTextView.getLocationOnScreen(mTmpIntOffset); 3318 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3319 builder.setMatrix(mViewToScreenMatrix); 3320 3321 final float viewportToContentHorizontalOffset = 3322 mTextView.viewportToContentHorizontalOffset(); 3323 final float viewportToContentVerticalOffset = 3324 mTextView.viewportToContentVerticalOffset(); 3325 3326 final CharSequence text = mTextView.getText(); 3327 if (text instanceof Spannable) { 3328 final Spannable sp = (Spannable) text; 3329 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3330 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3331 if (composingTextEnd < composingTextStart) { 3332 final int temp = composingTextEnd; 3333 composingTextEnd = composingTextStart; 3334 composingTextStart = temp; 3335 } 3336 final boolean hasComposingText = 3337 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3338 if (hasComposingText) { 3339 final CharSequence composingText = text.subSequence(composingTextStart, 3340 composingTextEnd); 3341 builder.setComposingText(composingTextStart, composingText); 3342 3343 final int minLine = layout.getLineForOffset(composingTextStart); 3344 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3345 for (int line = minLine; line <= maxLine; ++line) { 3346 final int lineStart = layout.getLineStart(line); 3347 final int lineEnd = layout.getLineEnd(line); 3348 final int offsetStart = Math.max(lineStart, composingTextStart); 3349 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3350 final boolean ltrLine = 3351 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3352 final float[] widths = new float[offsetEnd - offsetStart]; 3353 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3354 final float top = layout.getLineTop(line); 3355 final float bottom = layout.getLineBottom(line); 3356 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3357 final float charWidth = widths[offset - offsetStart]; 3358 final boolean isRtl = layout.isRtlCharAt(offset); 3359 final float primary = layout.getPrimaryHorizontal(offset); 3360 final float secondary = layout.getSecondaryHorizontal(offset); 3361 // TODO: This doesn't work perfectly for text with custom styles and 3362 // TAB chars. 3363 final float left; 3364 final float right; 3365 if (ltrLine) { 3366 if (isRtl) { 3367 left = secondary - charWidth; 3368 right = secondary; 3369 } else { 3370 left = primary; 3371 right = primary + charWidth; 3372 } 3373 } else { 3374 if (!isRtl) { 3375 left = secondary; 3376 right = secondary + charWidth; 3377 } else { 3378 left = primary - charWidth; 3379 right = primary; 3380 } 3381 } 3382 // TODO: Check top-right and bottom-left as well. 3383 final float localLeft = left + viewportToContentHorizontalOffset; 3384 final float localRight = right + viewportToContentHorizontalOffset; 3385 final float localTop = top + viewportToContentVerticalOffset; 3386 final float localBottom = bottom + viewportToContentVerticalOffset; 3387 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3388 final boolean isBottomRightVisible = 3389 isPositionVisible(localRight, localBottom); 3390 int characterBoundsFlags = 0; 3391 if (isTopLeftVisible || isBottomRightVisible) { 3392 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3393 } 3394 if (!isTopLeftVisible || !isBottomRightVisible) { 3395 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3396 } 3397 if (isRtl) { 3398 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3399 } 3400 // Here offset is the index in Java chars. 3401 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3402 localBottom, characterBoundsFlags); 3403 } 3404 } 3405 } 3406 } 3407 3408 // Treat selectionStart as the insertion point. 3409 if (0 <= selectionStart) { 3410 final int offset = selectionStart; 3411 final int line = layout.getLineForOffset(offset); 3412 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3413 + viewportToContentHorizontalOffset; 3414 final float insertionMarkerTop = layout.getLineTop(line) 3415 + viewportToContentVerticalOffset; 3416 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3417 + viewportToContentVerticalOffset; 3418 final float insertionMarkerBottom = layout.getLineBottom(line) 3419 + viewportToContentVerticalOffset; 3420 final boolean isTopVisible = 3421 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3422 final boolean isBottomVisible = 3423 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3424 int insertionMarkerFlags = 0; 3425 if (isTopVisible || isBottomVisible) { 3426 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3427 } 3428 if (!isTopVisible || !isBottomVisible) { 3429 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3430 } 3431 if (layout.isRtlCharAt(offset)) { 3432 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3433 } 3434 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3435 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3436 } 3437 3438 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3439 } 3440 } 3441 3442 private abstract class HandleView extends View implements TextViewPositionListener { 3443 protected Drawable mDrawable; 3444 protected Drawable mDrawableLtr; 3445 protected Drawable mDrawableRtl; 3446 private final PopupWindow mContainer; 3447 // Position with respect to the parent TextView 3448 private int mPositionX, mPositionY; 3449 private boolean mIsDragging; 3450 // Offset from touch position to mPosition 3451 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3452 protected int mHotspotX; 3453 protected int mHorizontalGravity; 3454 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3455 private float mTouchOffsetY; 3456 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3457 private float mIdealVerticalOffset; 3458 // Parent's (TextView) previous position in window 3459 private int mLastParentX, mLastParentY; 3460 // Previous text character offset 3461 protected int mPreviousOffset = -1; 3462 // Previous text character offset 3463 private boolean mPositionHasChanged = true; 3464 // Minimum touch target size for handles 3465 private int mMinSize; 3466 // Indicates the line of text that the handle is on. 3467 protected int mPrevLine = -1; 3468 3469 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3470 super(mTextView.getContext()); 3471 mContainer = new PopupWindow(mTextView.getContext(), null, 3472 com.android.internal.R.attr.textSelectHandleWindowStyle); 3473 mContainer.setSplitTouchEnabled(true); 3474 mContainer.setClippingEnabled(false); 3475 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3476 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3477 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3478 mContainer.setContentView(this); 3479 3480 mDrawableLtr = drawableLtr; 3481 mDrawableRtl = drawableRtl; 3482 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3483 com.android.internal.R.dimen.text_handle_min_size); 3484 3485 updateDrawable(); 3486 3487 final int handleHeight = getPreferredHeight(); 3488 mTouchOffsetY = -0.3f * handleHeight; 3489 mIdealVerticalOffset = 0.7f * handleHeight; 3490 } 3491 3492 protected void updateDrawable() { 3493 final int offset = getCurrentCursorOffset(); 3494 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3495 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3496 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3497 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3498 } 3499 3500 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3501 protected abstract int getHorizontalGravity(boolean isRtlRun); 3502 3503 // Touch-up filter: number of previous positions remembered 3504 private static final int HISTORY_SIZE = 5; 3505 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3506 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3507 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3508 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3509 private int mPreviousOffsetIndex = 0; 3510 private int mNumberPreviousOffsets = 0; 3511 3512 private void startTouchUpFilter(int offset) { 3513 mNumberPreviousOffsets = 0; 3514 addPositionToTouchUpFilter(offset); 3515 } 3516 3517 private void addPositionToTouchUpFilter(int offset) { 3518 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3519 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3520 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3521 mNumberPreviousOffsets++; 3522 } 3523 3524 private void filterOnTouchUp() { 3525 final long now = SystemClock.uptimeMillis(); 3526 int i = 0; 3527 int index = mPreviousOffsetIndex; 3528 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3529 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3530 i++; 3531 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3532 } 3533 3534 if (i > 0 && i < iMax && 3535 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3536 positionAtCursorOffset(mPreviousOffsets[index], false); 3537 } 3538 } 3539 3540 public boolean offsetHasBeenChanged() { 3541 return mNumberPreviousOffsets > 1; 3542 } 3543 3544 @Override 3545 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3546 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3547 } 3548 3549 private int getPreferredWidth() { 3550 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3551 } 3552 3553 private int getPreferredHeight() { 3554 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3555 } 3556 3557 public void show() { 3558 if (isShowing()) return; 3559 3560 getPositionListener().addSubscriber(this, true /* local position may change */); 3561 3562 // Make sure the offset is always considered new, even when focusing at same position 3563 mPreviousOffset = -1; 3564 positionAtCursorOffset(getCurrentCursorOffset(), false); 3565 } 3566 3567 protected void dismiss() { 3568 mIsDragging = false; 3569 mContainer.dismiss(); 3570 onDetached(); 3571 } 3572 3573 public void hide() { 3574 dismiss(); 3575 3576 getPositionListener().removeSubscriber(this); 3577 } 3578 3579 public boolean isShowing() { 3580 return mContainer.isShowing(); 3581 } 3582 3583 private boolean isVisible() { 3584 // Always show a dragging handle. 3585 if (mIsDragging) { 3586 return true; 3587 } 3588 3589 if (mTextView.isInBatchEditMode()) { 3590 return false; 3591 } 3592 3593 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3594 } 3595 3596 public abstract int getCurrentCursorOffset(); 3597 3598 protected abstract void updateSelection(int offset); 3599 3600 public abstract void updatePosition(float x, float y); 3601 3602 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3603 // A HandleView relies on the layout, which may be nulled by external methods 3604 Layout layout = mTextView.getLayout(); 3605 if (layout == null) { 3606 // Will update controllers' state, hiding them and stopping selection mode if needed 3607 prepareCursorControllers(); 3608 return; 3609 } 3610 3611 boolean offsetChanged = offset != mPreviousOffset; 3612 if (offsetChanged || parentScrolled) { 3613 if (offsetChanged) { 3614 updateSelection(offset); 3615 addPositionToTouchUpFilter(offset); 3616 } 3617 final int line = layout.getLineForOffset(offset); 3618 mPrevLine = line; 3619 3620 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3621 getHorizontalOffset() + getCursorOffset()); 3622 mPositionY = layout.getLineBottom(line); 3623 3624 // Take TextView's padding and scroll into account. 3625 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3626 mPositionY += mTextView.viewportToContentVerticalOffset(); 3627 3628 mPreviousOffset = offset; 3629 mPositionHasChanged = true; 3630 } 3631 } 3632 3633 public void updatePosition(int parentPositionX, int parentPositionY, 3634 boolean parentPositionChanged, boolean parentScrolled) { 3635 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3636 if (parentPositionChanged || mPositionHasChanged) { 3637 if (mIsDragging) { 3638 // Update touchToWindow offset in case of parent scrolling while dragging 3639 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3640 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3641 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3642 mLastParentX = parentPositionX; 3643 mLastParentY = parentPositionY; 3644 } 3645 3646 onHandleMoved(); 3647 } 3648 3649 if (isVisible()) { 3650 final int positionX = parentPositionX + mPositionX; 3651 final int positionY = parentPositionY + mPositionY; 3652 if (isShowing()) { 3653 mContainer.update(positionX, positionY, -1, -1); 3654 } else { 3655 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3656 positionX, positionY); 3657 } 3658 } else { 3659 if (isShowing()) { 3660 dismiss(); 3661 } 3662 } 3663 3664 mPositionHasChanged = false; 3665 } 3666 } 3667 3668 public void showAtLocation(int offset) { 3669 // TODO - investigate if there's a better way to show the handles 3670 // after the drag accelerator has occured. 3671 int[] tmpCords = new int[2]; 3672 mTextView.getLocationInWindow(tmpCords); 3673 3674 Layout layout = mTextView.getLayout(); 3675 int posX = tmpCords[0]; 3676 int posY = tmpCords[1]; 3677 3678 final int line = layout.getLineForOffset(offset); 3679 3680 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3681 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3682 int startY = layout.getLineBottom(line); 3683 3684 // Take TextView's padding and scroll into account. 3685 startX += mTextView.viewportToContentHorizontalOffset(); 3686 startY += mTextView.viewportToContentVerticalOffset(); 3687 3688 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3689 startX + posX, startY + posY); 3690 } 3691 3692 @Override 3693 protected void onDraw(Canvas c) { 3694 final int drawWidth = mDrawable.getIntrinsicWidth(); 3695 final int left = getHorizontalOffset(); 3696 3697 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3698 mDrawable.draw(c); 3699 } 3700 3701 private int getHorizontalOffset() { 3702 final int width = getPreferredWidth(); 3703 final int drawWidth = mDrawable.getIntrinsicWidth(); 3704 final int left; 3705 switch (mHorizontalGravity) { 3706 case Gravity.LEFT: 3707 left = 0; 3708 break; 3709 default: 3710 case Gravity.CENTER: 3711 left = (width - drawWidth) / 2; 3712 break; 3713 case Gravity.RIGHT: 3714 left = width - drawWidth; 3715 break; 3716 } 3717 return left; 3718 } 3719 3720 protected int getCursorOffset() { 3721 return 0; 3722 } 3723 3724 @Override 3725 public boolean onTouchEvent(MotionEvent ev) { 3726 switch (ev.getActionMasked()) { 3727 case MotionEvent.ACTION_DOWN: { 3728 startTouchUpFilter(getCurrentCursorOffset()); 3729 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3730 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3731 3732 final PositionListener positionListener = getPositionListener(); 3733 mLastParentX = positionListener.getPositionX(); 3734 mLastParentY = positionListener.getPositionY(); 3735 mIsDragging = true; 3736 break; 3737 } 3738 3739 case MotionEvent.ACTION_MOVE: { 3740 final float rawX = ev.getRawX(); 3741 final float rawY = ev.getRawY(); 3742 3743 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3744 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3745 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3746 float newVerticalOffset; 3747 if (previousVerticalOffset < mIdealVerticalOffset) { 3748 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3749 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3750 } else { 3751 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3752 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3753 } 3754 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3755 3756 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3757 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3758 3759 updatePosition(newPosX, newPosY); 3760 break; 3761 } 3762 3763 case MotionEvent.ACTION_UP: 3764 filterOnTouchUp(); 3765 mIsDragging = false; 3766 break; 3767 3768 case MotionEvent.ACTION_CANCEL: 3769 mIsDragging = false; 3770 break; 3771 } 3772 return true; 3773 } 3774 3775 public boolean isDragging() { 3776 return mIsDragging; 3777 } 3778 3779 void onHandleMoved() {} 3780 3781 public void onDetached() {} 3782 } 3783 3784 private class InsertionHandleView extends HandleView { 3785 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3786 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3787 3788 // Used to detect taps on the insertion handle, which will affect the selection action mode 3789 private float mDownPositionX, mDownPositionY; 3790 private Runnable mHider; 3791 3792 public InsertionHandleView(Drawable drawable) { 3793 super(drawable, drawable); 3794 } 3795 3796 @Override 3797 public void show() { 3798 super.show(); 3799 3800 final long durationSinceCutOrCopy = 3801 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3802 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3803 startSelectionActionModeWithoutSelection(); 3804 } 3805 3806 hideAfterDelay(); 3807 } 3808 3809 private void hideAfterDelay() { 3810 if (mHider == null) { 3811 mHider = new Runnable() { 3812 public void run() { 3813 hide(); 3814 } 3815 }; 3816 } else { 3817 removeHiderCallback(); 3818 } 3819 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3820 } 3821 3822 private void removeHiderCallback() { 3823 if (mHider != null) { 3824 mTextView.removeCallbacks(mHider); 3825 } 3826 } 3827 3828 @Override 3829 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3830 return drawable.getIntrinsicWidth() / 2; 3831 } 3832 3833 @Override 3834 protected int getHorizontalGravity(boolean isRtlRun) { 3835 return Gravity.CENTER_HORIZONTAL; 3836 } 3837 3838 @Override 3839 protected int getCursorOffset() { 3840 int offset = super.getCursorOffset(); 3841 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3842 if (cursor != null) { 3843 cursor.getPadding(mTempRect); 3844 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3845 } 3846 return offset; 3847 } 3848 3849 @Override 3850 public boolean onTouchEvent(MotionEvent ev) { 3851 final boolean result = super.onTouchEvent(ev); 3852 3853 switch (ev.getActionMasked()) { 3854 case MotionEvent.ACTION_DOWN: 3855 mDownPositionX = ev.getRawX(); 3856 mDownPositionY = ev.getRawY(); 3857 break; 3858 3859 case MotionEvent.ACTION_UP: 3860 if (!offsetHasBeenChanged()) { 3861 final float deltaX = mDownPositionX - ev.getRawX(); 3862 final float deltaY = mDownPositionY - ev.getRawY(); 3863 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3864 3865 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3866 mTextView.getContext()); 3867 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3868 3869 if (distanceSquared < touchSlop * touchSlop) { 3870 // Tapping on the handle toggles the selection action mode. 3871 if (mSelectionActionMode != null) { 3872 mSelectionActionMode.finish(); 3873 } else { 3874 startSelectionActionModeWithoutSelection(); 3875 } 3876 } 3877 } else { 3878 if (mSelectionActionMode != null) { 3879 mSelectionActionMode.invalidateContentRect(); 3880 } 3881 } 3882 hideAfterDelay(); 3883 break; 3884 3885 case MotionEvent.ACTION_CANCEL: 3886 hideAfterDelay(); 3887 break; 3888 3889 default: 3890 break; 3891 } 3892 3893 return result; 3894 } 3895 3896 @Override 3897 public int getCurrentCursorOffset() { 3898 return mTextView.getSelectionStart(); 3899 } 3900 3901 @Override 3902 public void updateSelection(int offset) { 3903 Selection.setSelection((Spannable) mTextView.getText(), offset); 3904 } 3905 3906 @Override 3907 public void updatePosition(float x, float y) { 3908 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3909 } 3910 3911 @Override 3912 void onHandleMoved() { 3913 super.onHandleMoved(); 3914 removeHiderCallback(); 3915 } 3916 3917 @Override 3918 public void onDetached() { 3919 super.onDetached(); 3920 removeHiderCallback(); 3921 } 3922 } 3923 3924 private class SelectionStartHandleView extends HandleView { 3925 // Indicates whether the cursor is making adjustments within a word. 3926 private boolean mInWord = false; 3927 // Offset to track difference between touch and word boundary. 3928 protected int mTouchWordOffset; 3929 3930 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3931 super(drawableLtr, drawableRtl); 3932 } 3933 3934 @Override 3935 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3936 return isRtlRun ? 0 : drawable.getIntrinsicWidth(); 3937 } 3938 3939 @Override 3940 protected int getHorizontalGravity(boolean isRtlRun) { 3941 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 3942 } 3943 3944 @Override 3945 public int getCurrentCursorOffset() { 3946 return mTextView.getSelectionStart(); 3947 } 3948 3949 @Override 3950 public void updateSelection(int offset) { 3951 Selection.setSelection((Spannable) mTextView.getText(), offset, 3952 mTextView.getSelectionEnd()); 3953 updateDrawable(); 3954 if (mSelectionActionMode != null) { 3955 mSelectionActionMode.invalidate(); 3956 } 3957 } 3958 3959 @Override 3960 public void updatePosition(float x, float y) { 3961 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3962 final int currLine = mTextView.getLineAtCoordinate(y); 3963 3964 // Don't select white space on different lines. 3965 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 3966 3967 boolean positionCursor = false; 3968 int offset = trueOffset; 3969 int end = getWordEnd(offset); 3970 int start = getWordStart(offset); 3971 3972 if (offset < mPreviousOffset) { 3973 // User is increasing the selection. 3974 if (!mInWord || currLine < mPrevLine) { 3975 // We're not in a word, or we're on a different line so we'll expand by 3976 // word. First ensure the user has at least entered the next word. 3977 int offsetToWord = Math.min((end - start) / 2, 2); 3978 if (offset <= end - offsetToWord || currLine < mPrevLine) { 3979 offset = start; 3980 } else { 3981 offset = mPreviousOffset; 3982 } 3983 } 3984 mTouchWordOffset = Math.max(trueOffset - offset, 0); 3985 mInWord = !getWordIteratorWithText().isBoundary(offset); 3986 positionCursor = true; 3987 } else if (offset - mTouchWordOffset > mPreviousOffset) { 3988 // User is shrinking the selection. 3989 if (currLine > mPrevLine) { 3990 // We're on a different line, so we'll snap to word boundaries. 3991 offset = end; 3992 } 3993 offset -= mTouchWordOffset; 3994 mInWord = !getWordIteratorWithText().isBoundary(offset); 3995 positionCursor = true; 3996 } 3997 3998 // Handles can not cross and selection is at least one character. 3999 if (positionCursor) { 4000 final int selectionEnd = mTextView.getSelectionEnd(); 4001 if (offset >= selectionEnd) { 4002 // We can't cross the handles so let's just constrain the Y value. 4003 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 4004 if (alteredOffset >= selectionEnd) { 4005 // Can't pass the other drag handle. 4006 offset = Math.max(0, selectionEnd - 1); 4007 } else { 4008 offset = alteredOffset; 4009 } 4010 } 4011 positionAtCursorOffset(offset, false); 4012 } 4013 } 4014 4015 @Override 4016 public boolean onTouchEvent(MotionEvent event) { 4017 boolean superResult = super.onTouchEvent(event); 4018 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4019 // Reset the touch word offset when the user has lifted their finger. 4020 mTouchWordOffset = 0; 4021 } 4022 return superResult; 4023 } 4024 } 4025 4026 private class SelectionEndHandleView extends HandleView { 4027 // Indicates whether the cursor is making adjustments within a word. 4028 private boolean mInWord = false; 4029 // Offset to track difference between touch and word boundary. 4030 protected int mTouchWordOffset; 4031 4032 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 4033 super(drawableLtr, drawableRtl); 4034 } 4035 4036 @Override 4037 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4038 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 4039 } 4040 4041 @Override 4042 protected int getHorizontalGravity(boolean isRtlRun) { 4043 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 4044 } 4045 4046 @Override 4047 public int getCurrentCursorOffset() { 4048 return mTextView.getSelectionEnd(); 4049 } 4050 4051 @Override 4052 public void updateSelection(int offset) { 4053 Selection.setSelection((Spannable) mTextView.getText(), 4054 mTextView.getSelectionStart(), offset); 4055 if (mSelectionActionMode != null) { 4056 mSelectionActionMode.invalidate(); 4057 } 4058 updateDrawable(); 4059 } 4060 4061 @Override 4062 public void updatePosition(float x, float y) { 4063 final int trueOffset = mTextView.getOffsetForPosition(x, y); 4064 final int currLine = mTextView.getLineAtCoordinate(y); 4065 4066 // Don't select white space on different lines. 4067 if (isWhitespaceLine(mPrevLine, currLine, trueOffset)) return; 4068 4069 int offset = trueOffset; 4070 boolean positionCursor = false; 4071 int end = getWordEnd(offset); 4072 int start = getWordStart(offset); 4073 4074 if (offset > mPreviousOffset) { 4075 // User is increasing the selection. 4076 if (!mInWord || currLine > mPrevLine) { 4077 // We're not in a word, or we're on a different line so we'll expand by 4078 // word. First ensure the user has at least entered the next word. 4079 int midPoint = Math.min((end - start) / 2, 2); 4080 if (offset >= start + midPoint || currLine > mPrevLine) { 4081 offset = end; 4082 } else { 4083 offset = mPreviousOffset; 4084 } 4085 } 4086 mTouchWordOffset = Math.max(offset - trueOffset, 0); 4087 mInWord = !getWordIteratorWithText().isBoundary(offset); 4088 positionCursor = true; 4089 } else if (offset + mTouchWordOffset < mPreviousOffset) { 4090 // User is shrinking the selection. 4091 if (currLine < mPrevLine) { 4092 // We're on a different line, so we'll snap to word boundaries. 4093 offset = start; 4094 } 4095 offset += mTouchWordOffset; 4096 positionCursor = true; 4097 mInWord = !getWordIteratorWithText().isBoundary(offset); 4098 } 4099 4100 if (positionCursor) { 4101 final int selectionStart = mTextView.getSelectionStart(); 4102 if (offset <= selectionStart) { 4103 // We can't cross the handles so let's just constrain the Y value. 4104 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 4105 int length = mTextView.getText().length(); 4106 if (alteredOffset <= selectionStart) { 4107 // Can't pass the other drag handle. 4108 offset = Math.min(selectionStart + 1, length); 4109 } else { 4110 offset = Math.min(alteredOffset, length); 4111 } 4112 } 4113 positionAtCursorOffset(offset, false); 4114 } 4115 } 4116 4117 @Override 4118 public boolean onTouchEvent(MotionEvent event) { 4119 boolean superResult = super.onTouchEvent(event); 4120 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4121 // Reset the touch word offset when the user has lifted their finger. 4122 mTouchWordOffset = 0; 4123 } 4124 return superResult; 4125 } 4126 } 4127 4128 /** 4129 * Checks whether selection is happening on a different line than previous and 4130 * if that line only contains whitespace up to the touch location. 4131 * 4132 * @param prevLine The previous line the selection was on. 4133 * @param currLine The current line being selected. 4134 * @param offset The offset in the text where the touch occurred. 4135 * @return Whether or not it was just a white space line being selected. 4136 */ 4137 private boolean isWhitespaceLine(int prevLine, int currLine, int offset) { 4138 if (prevLine == currLine) { 4139 // Same line; don't care. 4140 return false; 4141 } 4142 CharSequence text = mTextView.getText(); 4143 if (offset == text.length()) { 4144 // No character at the last position. 4145 return false; 4146 } 4147 int lineEndOffset = mTextView.getLayout().getLineEnd(currLine); 4148 for (int cp, i = offset; i < lineEndOffset; i += Character.charCount(cp)) { 4149 cp = Character.codePointAt(text, i); 4150 if (!Character.isSpaceChar(cp) && !Character.isWhitespace(cp)) { 4151 // There are non white space chars on the line. 4152 return false; 4153 } 4154 } 4155 return true; 4156 } 4157 4158 /** 4159 * A CursorController instance can be used to control a cursor in the text. 4160 */ 4161 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4162 /** 4163 * Makes the cursor controller visible on screen. 4164 * See also {@link #hide()}. 4165 */ 4166 public void show(); 4167 4168 /** 4169 * Hide the cursor controller from screen. 4170 * See also {@link #show()}. 4171 */ 4172 public void hide(); 4173 4174 /** 4175 * Called when the view is detached from window. Perform house keeping task, such as 4176 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4177 * preventing the activity from being recycled. 4178 */ 4179 public void onDetached(); 4180 } 4181 4182 private class InsertionPointCursorController implements CursorController { 4183 private InsertionHandleView mHandle; 4184 4185 public void show() { 4186 getHandle().show(); 4187 } 4188 4189 public void hide() { 4190 if (mHandle != null) { 4191 mHandle.hide(); 4192 } 4193 } 4194 4195 public void onTouchModeChanged(boolean isInTouchMode) { 4196 if (!isInTouchMode) { 4197 hide(); 4198 } 4199 } 4200 4201 private InsertionHandleView getHandle() { 4202 if (mSelectHandleCenter == null) { 4203 mSelectHandleCenter = mTextView.getContext().getDrawable( 4204 mTextView.mTextSelectHandleRes); 4205 } 4206 if (mHandle == null) { 4207 mHandle = new InsertionHandleView(mSelectHandleCenter); 4208 } 4209 return mHandle; 4210 } 4211 4212 @Override 4213 public void onDetached() { 4214 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4215 observer.removeOnTouchModeChangeListener(this); 4216 4217 if (mHandle != null) mHandle.onDetached(); 4218 } 4219 } 4220 4221 class SelectionModifierCursorController implements CursorController { 4222 // The cursor controller handles, lazily created when shown. 4223 private SelectionStartHandleView mStartHandle; 4224 private SelectionEndHandleView mEndHandle; 4225 // The offsets of that last touch down event. Remembered to start selection there. 4226 private int mMinTouchOffset, mMaxTouchOffset; 4227 4228 // Double tap detection 4229 private long mPreviousTapUpTime = 0; 4230 private float mDownPositionX, mDownPositionY; 4231 private boolean mGestureStayedInTapRegion; 4232 4233 // Where the user first starts the drag motion. 4234 private int mStartOffset = -1; 4235 // Indicates whether the user is selecting text and using the drag accelerator. 4236 private boolean mDragAcceleratorActive; 4237 // Indicates the line of text the drag accelerator is on. 4238 private int mPrevLine = -1; 4239 4240 SelectionModifierCursorController() { 4241 resetTouchOffsets(); 4242 } 4243 4244 public void show() { 4245 if (mTextView.isInBatchEditMode()) { 4246 return; 4247 } 4248 initDrawables(); 4249 initHandles(); 4250 hideInsertionPointCursorController(); 4251 } 4252 4253 private void initDrawables() { 4254 if (mSelectHandleLeft == null) { 4255 mSelectHandleLeft = mTextView.getContext().getDrawable( 4256 mTextView.mTextSelectHandleLeftRes); 4257 } 4258 if (mSelectHandleRight == null) { 4259 mSelectHandleRight = mTextView.getContext().getDrawable( 4260 mTextView.mTextSelectHandleRightRes); 4261 } 4262 } 4263 4264 private void initHandles() { 4265 // Lazy object creation has to be done before updatePosition() is called. 4266 if (mStartHandle == null) { 4267 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4268 } 4269 if (mEndHandle == null) { 4270 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4271 } 4272 4273 mStartHandle.show(); 4274 mEndHandle.show(); 4275 4276 hideInsertionPointCursorController(); 4277 } 4278 4279 public void hide() { 4280 if (mStartHandle != null) mStartHandle.hide(); 4281 if (mEndHandle != null) mEndHandle.hide(); 4282 } 4283 4284 public void enterDrag() { 4285 // Just need to init the handles / hide insertion cursor. 4286 show(); 4287 mDragAcceleratorActive = true; 4288 // Start location of selection. 4289 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4290 mLastDownPositionY); 4291 // Don't show the handles until user has lifted finger. 4292 hide(); 4293 4294 // This stops scrolling parents from intercepting the touch event, allowing 4295 // the user to continue dragging across the screen to select text; TextView will 4296 // scroll as necessary. 4297 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4298 } 4299 4300 public void onTouchEvent(MotionEvent event) { 4301 // This is done even when the View does not have focus, so that long presses can start 4302 // selection and tap can move cursor from this tap position. 4303 switch (event.getActionMasked()) { 4304 case MotionEvent.ACTION_DOWN: 4305 final float x = event.getX(); 4306 final float y = event.getY(); 4307 4308 // Remember finger down position, to be able to start selection from there. 4309 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4310 4311 // Double tap detection 4312 if (mGestureStayedInTapRegion) { 4313 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 4314 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 4315 final float deltaX = x - mDownPositionX; 4316 final float deltaY = y - mDownPositionY; 4317 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4318 4319 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4320 mTextView.getContext()); 4321 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4322 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4323 4324 if (stayedInArea && isPositionOnText(x, y)) { 4325 startSelectionActionModeWithSelectionAndStartDrag(); 4326 mDiscardNextActionUp = true; 4327 } 4328 } 4329 } 4330 4331 // New selection, reset line. 4332 mPrevLine = mTextView.getLineAtCoordinate(y); 4333 mDownPositionX = x; 4334 mDownPositionY = y; 4335 mGestureStayedInTapRegion = true; 4336 break; 4337 4338 case MotionEvent.ACTION_POINTER_DOWN: 4339 case MotionEvent.ACTION_POINTER_UP: 4340 // Handle multi-point gestures. Keep min and max offset positions. 4341 // Only activated for devices that correctly handle multi-touch. 4342 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4343 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4344 updateMinAndMaxOffsets(event); 4345 } 4346 break; 4347 4348 case MotionEvent.ACTION_MOVE: 4349 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4350 mTextView.getContext()); 4351 4352 if (mGestureStayedInTapRegion) { 4353 final float deltaX = event.getX() - mDownPositionX; 4354 final float deltaY = event.getY() - mDownPositionY; 4355 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4356 4357 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4358 4359 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4360 mGestureStayedInTapRegion = false; 4361 } 4362 } 4363 4364 if (mStartHandle != null && mStartHandle.isShowing()) { 4365 // Don't do the drag if the handles are showing already. 4366 break; 4367 } 4368 4369 if (mStartOffset != -1) { 4370 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4371 event.getY()); 4372 int offset = rawOffset; 4373 4374 // We don't start "dragging" until the user is past the initial word that 4375 // gets selected on long press. 4376 int firstWordStart = getWordStart(mStartOffset); 4377 int firstWordEnd = getWordEnd(mStartOffset); 4378 if (offset > firstWordEnd || offset < firstWordStart) { 4379 4380 // Basically the goal in the below code is to have the highlight be 4381 // offset so that your finger isn't covering the end point. 4382 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4383 float mx = event.getX(); 4384 float my = event.getY(); 4385 if (mx > fingerOffset) mx -= fingerOffset; 4386 if (my > fingerOffset) my -= fingerOffset; 4387 offset = mTextView.getOffsetForPosition(mx, my); 4388 4389 int currLine = mTextView.getLineAtCoordinate(my); 4390 4391 // Don't select white space on different lines. 4392 if (isWhitespaceLine(mPrevLine, currLine, offset)) return; 4393 4394 mPrevLine = currLine; 4395 4396 // Perform the check for closeness at edge of view, if we're very close 4397 // don't adjust the offset to be in front of the finger - otherwise the 4398 // user can't select words at the edge. 4399 if (mTextView.getWidth() - fingerOffset > mx) { 4400 // We're going by word, so we need to make sure that the offset 4401 // that we get is within this, so we'll get the previous boundary. 4402 final WordIterator wordIterator = getWordIteratorWithText(); 4403 4404 final int precedingOffset = wordIterator.preceding(offset); 4405 if (mStartOffset < offset) { 4406 // Expanding with bottom handle, in this case the selection end 4407 // is before the finger. 4408 offset = Math.max(precedingOffset - 1, 0); 4409 } else { 4410 // Expand with the start handle, in this case the selection 4411 // start is before the finger. 4412 if (precedingOffset == WordIterator.DONE) { 4413 offset = 0; 4414 } else { 4415 offset = wordIterator.preceding(precedingOffset); 4416 } 4417 } 4418 } 4419 if (offset == WordIterator.DONE) 4420 offset = rawOffset; 4421 4422 // Need to adjust start offset based on direction of movement. 4423 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4424 : getWordEnd(mStartOffset); 4425 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4426 offset); 4427 } 4428 } 4429 break; 4430 4431 case MotionEvent.ACTION_UP: 4432 mPreviousTapUpTime = SystemClock.uptimeMillis(); 4433 if (mDragAcceleratorActive) { 4434 // No longer dragging to select text, let the parent intercept events. 4435 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4436 4437 show(); 4438 int startOffset = mTextView.getSelectionStart(); 4439 int endOffset = mTextView.getSelectionEnd(); 4440 4441 // Since we don't let drag handles pass once they're visible, we need to 4442 // make sure the start / end locations are correct because the user *can* 4443 // switch directions during the initial drag. 4444 if (endOffset < startOffset) { 4445 int tmp = endOffset; 4446 endOffset = startOffset; 4447 startOffset = tmp; 4448 4449 // Also update the selection with the right offsets in this case. 4450 Selection.setSelection((Spannable) mTextView.getText(), 4451 startOffset, endOffset); 4452 } 4453 4454 // Need to do this to display the handles. 4455 mStartHandle.showAtLocation(startOffset); 4456 mEndHandle.showAtLocation(endOffset); 4457 4458 // No longer the first dragging motion, reset. 4459 mDragAcceleratorActive = false; 4460 mStartOffset = -1; 4461 } 4462 break; 4463 } 4464 } 4465 4466 /** 4467 * @param event 4468 */ 4469 private void updateMinAndMaxOffsets(MotionEvent event) { 4470 int pointerCount = event.getPointerCount(); 4471 for (int index = 0; index < pointerCount; index++) { 4472 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4473 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4474 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4475 } 4476 } 4477 4478 public int getMinTouchOffset() { 4479 return mMinTouchOffset; 4480 } 4481 4482 public int getMaxTouchOffset() { 4483 return mMaxTouchOffset; 4484 } 4485 4486 public void resetTouchOffsets() { 4487 mMinTouchOffset = mMaxTouchOffset = -1; 4488 mStartOffset = -1; 4489 mDragAcceleratorActive = false; 4490 } 4491 4492 /** 4493 * @return true iff this controller is currently used to move the selection start. 4494 */ 4495 public boolean isSelectionStartDragged() { 4496 return mStartHandle != null && mStartHandle.isDragging(); 4497 } 4498 4499 /** 4500 * @return true if the user is selecting text using the drag accelerator. 4501 */ 4502 public boolean isDragAcceleratorActive() { 4503 return mDragAcceleratorActive; 4504 } 4505 4506 public void onTouchModeChanged(boolean isInTouchMode) { 4507 if (!isInTouchMode) { 4508 hide(); 4509 } 4510 } 4511 4512 @Override 4513 public void onDetached() { 4514 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4515 observer.removeOnTouchModeChangeListener(this); 4516 4517 if (mStartHandle != null) mStartHandle.onDetached(); 4518 if (mEndHandle != null) mEndHandle.onDetached(); 4519 } 4520 } 4521 4522 private class CorrectionHighlighter { 4523 private final Path mPath = new Path(); 4524 private final Paint mPaint = new Paint(); 4525 private int mStart, mEnd; 4526 private long mFadingStartTime; 4527 private RectF mTempRectF; 4528 private final static int FADE_OUT_DURATION = 400; 4529 4530 public CorrectionHighlighter() { 4531 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4532 applicationScale); 4533 mPaint.setStyle(Paint.Style.FILL); 4534 } 4535 4536 public void highlight(CorrectionInfo info) { 4537 mStart = info.getOffset(); 4538 mEnd = mStart + info.getNewText().length(); 4539 mFadingStartTime = SystemClock.uptimeMillis(); 4540 4541 if (mStart < 0 || mEnd < 0) { 4542 stopAnimation(); 4543 } 4544 } 4545 4546 public void draw(Canvas canvas, int cursorOffsetVertical) { 4547 if (updatePath() && updatePaint()) { 4548 if (cursorOffsetVertical != 0) { 4549 canvas.translate(0, cursorOffsetVertical); 4550 } 4551 4552 canvas.drawPath(mPath, mPaint); 4553 4554 if (cursorOffsetVertical != 0) { 4555 canvas.translate(0, -cursorOffsetVertical); 4556 } 4557 invalidate(true); // TODO invalidate cursor region only 4558 } else { 4559 stopAnimation(); 4560 invalidate(false); // TODO invalidate cursor region only 4561 } 4562 } 4563 4564 private boolean updatePaint() { 4565 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4566 if (duration > FADE_OUT_DURATION) return false; 4567 4568 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4569 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4570 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4571 ((int) (highlightColorAlpha * coef) << 24); 4572 mPaint.setColor(color); 4573 return true; 4574 } 4575 4576 private boolean updatePath() { 4577 final Layout layout = mTextView.getLayout(); 4578 if (layout == null) return false; 4579 4580 // Update in case text is edited while the animation is run 4581 final int length = mTextView.getText().length(); 4582 int start = Math.min(length, mStart); 4583 int end = Math.min(length, mEnd); 4584 4585 mPath.reset(); 4586 layout.getSelectionPath(start, end, mPath); 4587 return true; 4588 } 4589 4590 private void invalidate(boolean delayed) { 4591 if (mTextView.getLayout() == null) return; 4592 4593 if (mTempRectF == null) mTempRectF = new RectF(); 4594 mPath.computeBounds(mTempRectF, false); 4595 4596 int left = mTextView.getCompoundPaddingLeft(); 4597 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4598 4599 if (delayed) { 4600 mTextView.postInvalidateOnAnimation( 4601 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4602 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4603 } else { 4604 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4605 (int) mTempRectF.right, (int) mTempRectF.bottom); 4606 } 4607 } 4608 4609 private void stopAnimation() { 4610 Editor.this.mCorrectionHighlighter = null; 4611 } 4612 } 4613 4614 private static class ErrorPopup extends PopupWindow { 4615 private boolean mAbove = false; 4616 private final TextView mView; 4617 private int mPopupInlineErrorBackgroundId = 0; 4618 private int mPopupInlineErrorAboveBackgroundId = 0; 4619 4620 ErrorPopup(TextView v, int width, int height) { 4621 super(v, width, height); 4622 mView = v; 4623 // Make sure the TextView has a background set as it will be used the first time it is 4624 // shown and positioned. Initialized with below background, which should have 4625 // dimensions identical to the above version for this to work (and is more likely). 4626 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4627 com.android.internal.R.styleable.Theme_errorMessageBackground); 4628 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4629 } 4630 4631 void fixDirection(boolean above) { 4632 mAbove = above; 4633 4634 if (above) { 4635 mPopupInlineErrorAboveBackgroundId = 4636 getResourceId(mPopupInlineErrorAboveBackgroundId, 4637 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4638 } else { 4639 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4640 com.android.internal.R.styleable.Theme_errorMessageBackground); 4641 } 4642 4643 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4644 mPopupInlineErrorBackgroundId); 4645 } 4646 4647 private int getResourceId(int currentId, int index) { 4648 if (currentId == 0) { 4649 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4650 R.styleable.Theme); 4651 currentId = styledAttributes.getResourceId(index, 0); 4652 styledAttributes.recycle(); 4653 } 4654 return currentId; 4655 } 4656 4657 @Override 4658 public void update(int x, int y, int w, int h, boolean force) { 4659 super.update(x, y, w, h, force); 4660 4661 boolean above = isAboveAnchor(); 4662 if (above != mAbove) { 4663 fixDirection(above); 4664 } 4665 } 4666 } 4667 4668 static class InputContentType { 4669 int imeOptions = EditorInfo.IME_NULL; 4670 String privateImeOptions; 4671 CharSequence imeActionLabel; 4672 int imeActionId; 4673 Bundle extras; 4674 OnEditorActionListener onEditorActionListener; 4675 boolean enterDown; 4676 } 4677 4678 static class InputMethodState { 4679 ExtractedTextRequest mExtractedTextRequest; 4680 final ExtractedText mExtractedText = new ExtractedText(); 4681 int mBatchEditNesting; 4682 boolean mCursorChanged; 4683 boolean mSelectionModeChanged; 4684 boolean mContentChanged; 4685 int mChangedStart, mChangedEnd, mChangedDelta; 4686 } 4687 4688 /** 4689 * @return True iff (start, end) is a valid range within the text. 4690 */ 4691 private static boolean isValidRange(CharSequence text, int start, int end) { 4692 return 0 <= start && start <= end && end <= text.length(); 4693 } 4694 4695 /** 4696 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4697 * text being typed (and hence always returns null from the filter() method). 4698 */ 4699 public static class UndoInputFilter implements InputFilter { 4700 private final Editor mEditor; 4701 4702 // Whether the current filter pass is directly caused by an end-user text edit. 4703 private boolean mIsUserEdit; 4704 4705 // Whether the text field is handling an IME composition. Must be parceled in case the user 4706 // rotates the screen during composition. 4707 private boolean mHasComposition; 4708 4709 public UndoInputFilter(Editor editor) { 4710 mEditor = editor; 4711 } 4712 4713 public void saveInstanceState(Parcel parcel) { 4714 parcel.writeInt(mIsUserEdit ? 1 : 0); 4715 parcel.writeInt(mHasComposition ? 1 : 0); 4716 } 4717 4718 public void restoreInstanceState(Parcel parcel) { 4719 mIsUserEdit = parcel.readInt() != 0; 4720 mHasComposition = parcel.readInt() != 0; 4721 } 4722 4723 /** 4724 * Signals that a user-triggered edit is starting. 4725 */ 4726 public void beginBatchEdit() { 4727 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4728 mIsUserEdit = true; 4729 } 4730 4731 public void endBatchEdit() { 4732 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4733 mIsUserEdit = false; 4734 } 4735 4736 @Override 4737 public CharSequence filter(CharSequence source, int start, int end, 4738 Spanned dest, int dstart, int dend) { 4739 if (DEBUG_UNDO) { 4740 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4741 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4742 } 4743 4744 // Check to see if this edit should be tracked for undo. 4745 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4746 return null; 4747 } 4748 4749 // Check for and handle IME composition edits. 4750 if (handleCompositionEdit(source, start, end, dstart)) { 4751 return null; 4752 } 4753 4754 // Handle keyboard edits. 4755 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4756 return null; 4757 } 4758 4759 /** 4760 * Returns true iff the edit was handled, either because it should be ignored or because 4761 * this function created an undo operation for it. 4762 */ 4763 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4764 // Ignore edits while the user is composing. 4765 if (isComposition(source)) { 4766 mHasComposition = true; 4767 return true; 4768 } 4769 final boolean hadComposition = mHasComposition; 4770 mHasComposition = false; 4771 4772 // Check for the transition out of the composing state. 4773 if (hadComposition) { 4774 // If there was no text the user canceled composition. Ignore the edit. 4775 if (start == end) { 4776 return true; 4777 } 4778 4779 // Otherwise the user inserted the composition. 4780 String newText = TextUtils.substring(source, start, end); 4781 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4782 recordEdit(edit, false /* forceMerge */); 4783 return true; 4784 } 4785 4786 // This was neither a composition event nor a transition out of composing. 4787 return false; 4788 } 4789 4790 private void handleKeyboardEdit(CharSequence source, int start, int end, 4791 Spanned dest, int dstart, int dend) { 4792 // An application may install a TextWatcher to provide additional modifications after 4793 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4794 // string). This results in multiple filter() calls for what the user considers to be 4795 // a single operation. Always undo the whole set of changes in one step. 4796 final boolean forceMerge = isInTextWatcher(); 4797 4798 // Build a new operation with all the information from this edit. 4799 String newText = TextUtils.substring(source, start, end); 4800 String oldText = TextUtils.substring(dest, dstart, dend); 4801 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4802 recordEdit(edit, forceMerge); 4803 } 4804 4805 /** 4806 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4807 * If forceMerge is true then the new edit is always merged. 4808 */ 4809 private void recordEdit(EditOperation edit, boolean forceMerge) { 4810 // Fetch the last edit operation and attempt to merge in the new edit. 4811 final UndoManager um = mEditor.mUndoManager; 4812 um.beginUpdate("Edit text"); 4813 EditOperation lastEdit = um.getLastOperation( 4814 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4815 if (lastEdit == null) { 4816 // Add this as the first edit. 4817 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4818 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4819 } else if (forceMerge) { 4820 // Forced merges take priority because they could be the result of a non-user-edit 4821 // change and this case should not create a new undo operation. 4822 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4823 lastEdit.forceMergeWith(edit); 4824 } else if (!mIsUserEdit) { 4825 // An application directly modified the Editable outside of a text edit. Treat this 4826 // as a new change and don't attempt to merge. 4827 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4828 um.commitState(mEditor.mUndoOwner); 4829 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4830 } else if (lastEdit.mergeWith(edit)) { 4831 // Merge succeeded, nothing else to do. 4832 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4833 } else { 4834 // Could not merge with the last edit, so commit the last edit and add this edit. 4835 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4836 um.commitState(mEditor.mUndoOwner); 4837 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4838 } 4839 um.endUpdate(); 4840 } 4841 4842 private boolean canUndoEdit(CharSequence source, int start, int end, 4843 Spanned dest, int dstart, int dend) { 4844 if (!mEditor.mAllowUndo) { 4845 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4846 return false; 4847 } 4848 4849 if (mEditor.mUndoManager.isInUndo()) { 4850 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4851 return false; 4852 } 4853 4854 // Text filters run before input operations are applied. However, some input operations 4855 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4856 // attempt to undo invalid operations. 4857 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4858 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4859 return false; 4860 } 4861 4862 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4863 // on an input field. Skip no-op changes. 4864 if (start == end && dstart == dend) { 4865 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4866 return false; 4867 } 4868 4869 return true; 4870 } 4871 4872 private boolean isComposition(CharSequence source) { 4873 if (!(source instanceof Spannable)) { 4874 return false; 4875 } 4876 // This is a composition edit if the source has a non-zero-length composing span. 4877 Spannable text = (Spannable) source; 4878 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4879 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4880 return composeBegin < composeEnd; 4881 } 4882 4883 private boolean isInTextWatcher() { 4884 CharSequence text = mEditor.mTextView.getText(); 4885 return (text instanceof SpannableStringBuilder) 4886 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4887 } 4888 } 4889 4890 /** 4891 * An operation to undo a single "edit" to a text view. 4892 */ 4893 public static class EditOperation extends UndoOperation<Editor> { 4894 private static final int TYPE_INSERT = 0; 4895 private static final int TYPE_DELETE = 1; 4896 private static final int TYPE_REPLACE = 2; 4897 4898 private int mType; 4899 private String mOldText; 4900 private int mOldTextStart; 4901 private String mNewText; 4902 private int mNewTextStart; 4903 4904 private int mOldCursorPos; 4905 private int mNewCursorPos; 4906 4907 /** 4908 * Constructs an edit operation from a text input operation on editor that replaces the 4909 * oldText starting at dstart with newText. 4910 */ 4911 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 4912 super(editor.mUndoOwner); 4913 mOldText = oldText; 4914 mNewText = newText; 4915 4916 // Determine the type of the edit and store where it occurred. Avoid storing 4917 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4918 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4919 // outside the bounds of the final text). 4920 if (mNewText.length() > 0 && mOldText.length() == 0) { 4921 mType = TYPE_INSERT; 4922 mNewTextStart = dstart; 4923 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4924 mType = TYPE_DELETE; 4925 mOldTextStart = dstart; 4926 } else { 4927 mType = TYPE_REPLACE; 4928 mOldTextStart = mNewTextStart = dstart; 4929 } 4930 4931 // Store cursor data. 4932 mOldCursorPos = editor.mTextView.getSelectionStart(); 4933 mNewCursorPos = dstart + mNewText.length(); 4934 } 4935 4936 public EditOperation(Parcel src, ClassLoader loader) { 4937 super(src, loader); 4938 mType = src.readInt(); 4939 mOldText = src.readString(); 4940 mOldTextStart = src.readInt(); 4941 mNewText = src.readString(); 4942 mNewTextStart = src.readInt(); 4943 mOldCursorPos = src.readInt(); 4944 mNewCursorPos = src.readInt(); 4945 } 4946 4947 @Override 4948 public void writeToParcel(Parcel dest, int flags) { 4949 dest.writeInt(mType); 4950 dest.writeString(mOldText); 4951 dest.writeInt(mOldTextStart); 4952 dest.writeString(mNewText); 4953 dest.writeInt(mNewTextStart); 4954 dest.writeInt(mOldCursorPos); 4955 dest.writeInt(mNewCursorPos); 4956 } 4957 4958 private int getNewTextEnd() { 4959 return mNewTextStart + mNewText.length(); 4960 } 4961 4962 private int getOldTextEnd() { 4963 return mOldTextStart + mOldText.length(); 4964 } 4965 4966 @Override 4967 public void commit() { 4968 } 4969 4970 @Override 4971 public void undo() { 4972 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4973 // Remove the new text and insert the old. 4974 Editor editor = getOwnerData(); 4975 Editable text = (Editable) editor.mTextView.getText(); 4976 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4977 mOldCursorPos); 4978 } 4979 4980 @Override 4981 public void redo() { 4982 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4983 // Remove the old text and insert the new. 4984 Editor editor = getOwnerData(); 4985 Editable text = (Editable) editor.mTextView.getText(); 4986 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4987 mNewCursorPos); 4988 } 4989 4990 /** 4991 * Attempts to merge this existing operation with a new edit. 4992 * @param edit The new edit operation. 4993 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4994 * object unchanged. 4995 */ 4996 private boolean mergeWith(EditOperation edit) { 4997 if (DEBUG_UNDO) { 4998 Log.d(TAG, "mergeWith old " + this); 4999 Log.d(TAG, "mergeWith new " + edit); 5000 } 5001 switch (mType) { 5002 case TYPE_INSERT: 5003 return mergeInsertWith(edit); 5004 case TYPE_DELETE: 5005 return mergeDeleteWith(edit); 5006 case TYPE_REPLACE: 5007 return mergeReplaceWith(edit); 5008 default: 5009 return false; 5010 } 5011 } 5012 5013 private boolean mergeInsertWith(EditOperation edit) { 5014 // Only merge continuous insertions. 5015 if (edit.mType != TYPE_INSERT) { 5016 return false; 5017 } 5018 // Only merge insertions that are contiguous. 5019 if (getNewTextEnd() != edit.mNewTextStart) { 5020 return false; 5021 } 5022 mNewText += edit.mNewText; 5023 mNewCursorPos = edit.mNewCursorPos; 5024 return true; 5025 } 5026 5027 // TODO: Support forward delete. 5028 private boolean mergeDeleteWith(EditOperation edit) { 5029 // Only merge continuous deletes. 5030 if (edit.mType != TYPE_DELETE) { 5031 return false; 5032 } 5033 // Only merge deletions that are contiguous. 5034 if (mOldTextStart != edit.getOldTextEnd()) { 5035 return false; 5036 } 5037 mOldTextStart = edit.mOldTextStart; 5038 mOldText = edit.mOldText + mOldText; 5039 mNewCursorPos = edit.mNewCursorPos; 5040 return true; 5041 } 5042 5043 private boolean mergeReplaceWith(EditOperation edit) { 5044 // Replacements can merge only with adjacent inserts. 5045 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 5046 return false; 5047 } 5048 mOldText += edit.mOldText; 5049 mNewText += edit.mNewText; 5050 mNewCursorPos = edit.mNewCursorPos; 5051 return true; 5052 } 5053 5054 /** 5055 * Forcibly creates a single merged edit operation by simulating the entire text 5056 * contents being replaced. 5057 */ 5058 public void forceMergeWith(EditOperation edit) { 5059 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5060 Editor editor = getOwnerData(); 5061 5062 // Copy the text of the current field. 5063 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5064 // but would require two parallel implementations of modifyText() because Editable and 5065 // StringBuilder do not share an interface for replace/delete/insert. 5066 Editable editable = (Editable) editor.mTextView.getText(); 5067 Editable originalText = new SpannableStringBuilder(editable.toString()); 5068 5069 // Roll back the last operation. 5070 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5071 mOldCursorPos); 5072 5073 // Clone the text again and apply the new operation. 5074 Editable finalText = new SpannableStringBuilder(editable.toString()); 5075 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5076 edit.mNewTextStart, edit.mNewCursorPos); 5077 5078 // Convert this operation into a non-mergeable replacement of the entire string. 5079 mType = TYPE_REPLACE; 5080 mNewText = finalText.toString(); 5081 mNewTextStart = 0; 5082 mOldText = originalText.toString(); 5083 mOldTextStart = 0; 5084 mNewCursorPos = edit.mNewCursorPos; 5085 // mOldCursorPos is unchanged. 5086 } 5087 5088 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5089 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5090 // Apply the edit if it is still valid. 5091 if (isValidRange(text, deleteFrom, deleteTo) && 5092 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5093 if (deleteFrom != deleteTo) { 5094 text.delete(deleteFrom, deleteTo); 5095 } 5096 if (newText.length() != 0) { 5097 text.insert(newTextInsertAt, newText); 5098 } 5099 } 5100 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5101 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5102 // TODO: Select all the text that was undone. 5103 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5104 Selection.setSelection(text, newCursorPos); 5105 } 5106 } 5107 5108 private String getTypeString() { 5109 switch (mType) { 5110 case TYPE_INSERT: 5111 return "insert"; 5112 case TYPE_DELETE: 5113 return "delete"; 5114 case TYPE_REPLACE: 5115 return "replace"; 5116 default: 5117 return ""; 5118 } 5119 } 5120 5121 @Override 5122 public String toString() { 5123 return "[mType=" + getTypeString() + ", " + 5124 "mOldText=" + mOldText + ", " + 5125 "mOldTextStart=" + mOldTextStart + ", " + 5126 "mNewText=" + mNewText + ", " + 5127 "mNewTextStart=" + mNewTextStart + ", " + 5128 "mOldCursorPos=" + mOldCursorPos + ", " + 5129 "mNewCursorPos=" + mNewCursorPos + "]"; 5130 } 5131 5132 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5133 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5134 @Override 5135 public EditOperation createFromParcel(Parcel in) { 5136 return new EditOperation(in, null); 5137 } 5138 5139 @Override 5140 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5141 return new EditOperation(in, loader); 5142 } 5143 5144 @Override 5145 public EditOperation[] newArray(int size) { 5146 return new EditOperation[size]; 5147 } 5148 }; 5149 } 5150} 5151