Editor.java revision 78e2f07e81ee9040a4ecca331411123ef35d81c2
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 replace() { 290 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 291 stopSelectionActionMode(); 292 Selection.setSelection((Spannable) mTextView.getText(), middle); 293 showSuggestions(); 294 } 295 296 void onAttachedToWindow() { 297 if (mShowErrorAfterAttach) { 298 showError(); 299 mShowErrorAfterAttach = false; 300 } 301 mTemporaryDetach = false; 302 303 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 304 // No need to create the controller. 305 // The get method will add the listener on controller creation. 306 if (mInsertionPointCursorController != null) { 307 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 308 } 309 if (mSelectionModifierCursorController != null) { 310 mSelectionModifierCursorController.resetTouchOffsets(); 311 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 312 } 313 updateSpellCheckSpans(0, mTextView.getText().length(), 314 true /* create the spell checker if needed */); 315 316 if (mTextView.hasTransientState() && 317 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 318 // Since transient state is reference counted make sure it stays matched 319 // with our own calls to it for managing selection. 320 // The action mode callback will set this back again when/if the action mode starts. 321 mTextView.setHasTransientState(false); 322 323 // We had an active selection from before, start the selection mode. 324 startSelectionActionModeWithSelection(); 325 } 326 327 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 328 resumeBlink(); 329 } 330 331 void onDetachedFromWindow() { 332 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 333 334 if (mError != null) { 335 hideError(); 336 } 337 338 suspendBlink(); 339 340 if (mInsertionPointCursorController != null) { 341 mInsertionPointCursorController.onDetached(); 342 } 343 344 if (mSelectionModifierCursorController != null) { 345 mSelectionModifierCursorController.onDetached(); 346 } 347 348 if (mShowSuggestionRunnable != null) { 349 mTextView.removeCallbacks(mShowSuggestionRunnable); 350 } 351 352 destroyDisplayListsData(); 353 354 if (mSpellChecker != null) { 355 mSpellChecker.closeSession(); 356 // Forces the creation of a new SpellChecker next time this window is created. 357 // Will handle the cases where the settings has been changed in the meantime. 358 mSpellChecker = null; 359 } 360 361 mPreserveDetachedSelection = true; 362 hideControllers(); 363 mPreserveDetachedSelection = false; 364 mTemporaryDetach = false; 365 } 366 367 private void destroyDisplayListsData() { 368 if (mTextRenderNodes != null) { 369 for (int i = 0; i < mTextRenderNodes.length; i++) { 370 RenderNode displayList = mTextRenderNodes[i] != null 371 ? mTextRenderNodes[i].renderNode : null; 372 if (displayList != null && displayList.isValid()) { 373 displayList.destroyDisplayListData(); 374 } 375 } 376 } 377 } 378 379 private void showError() { 380 if (mTextView.getWindowToken() == null) { 381 mShowErrorAfterAttach = true; 382 return; 383 } 384 385 if (mErrorPopup == null) { 386 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 387 final TextView err = (TextView) inflater.inflate( 388 com.android.internal.R.layout.textview_hint, null); 389 390 final float scale = mTextView.getResources().getDisplayMetrics().density; 391 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 392 mErrorPopup.setFocusable(false); 393 // The user is entering text, so the input method is needed. We 394 // don't want the popup to be displayed on top of it. 395 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 396 } 397 398 TextView tv = (TextView) mErrorPopup.getContentView(); 399 chooseSize(mErrorPopup, mError, tv); 400 tv.setText(mError); 401 402 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 403 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 404 } 405 406 public void setError(CharSequence error, Drawable icon) { 407 mError = TextUtils.stringOrSpannedString(error); 408 mErrorWasChanged = true; 409 410 if (mError == null) { 411 setErrorIcon(null); 412 if (mErrorPopup != null) { 413 if (mErrorPopup.isShowing()) { 414 mErrorPopup.dismiss(); 415 } 416 417 mErrorPopup = null; 418 } 419 mShowErrorAfterAttach = false; 420 } else { 421 setErrorIcon(icon); 422 if (mTextView.isFocused()) { 423 showError(); 424 } 425 } 426 } 427 428 private void setErrorIcon(Drawable icon) { 429 Drawables dr = mTextView.mDrawables; 430 if (dr == null) { 431 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 432 } 433 dr.setErrorDrawable(icon, mTextView); 434 435 mTextView.resetResolvedDrawables(); 436 mTextView.invalidate(); 437 mTextView.requestLayout(); 438 } 439 440 private void hideError() { 441 if (mErrorPopup != null) { 442 if (mErrorPopup.isShowing()) { 443 mErrorPopup.dismiss(); 444 } 445 } 446 447 mShowErrorAfterAttach = false; 448 } 449 450 /** 451 * Returns the X offset to make the pointy top of the error point 452 * at the middle of the error icon. 453 */ 454 private int getErrorX() { 455 /* 456 * The "25" is the distance between the point and the right edge 457 * of the background 458 */ 459 final float scale = mTextView.getResources().getDisplayMetrics().density; 460 461 final Drawables dr = mTextView.mDrawables; 462 463 final int layoutDirection = mTextView.getLayoutDirection(); 464 int errorX; 465 int offset; 466 switch (layoutDirection) { 467 default: 468 case View.LAYOUT_DIRECTION_LTR: 469 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 470 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 471 mTextView.getPaddingRight() + offset; 472 break; 473 case View.LAYOUT_DIRECTION_RTL: 474 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 475 errorX = mTextView.getPaddingLeft() + offset; 476 break; 477 } 478 return errorX; 479 } 480 481 /** 482 * Returns the Y offset to make the pointy top of the error point 483 * at the bottom of the error icon. 484 */ 485 private int getErrorY() { 486 /* 487 * Compound, not extended, because the icon is not clipped 488 * if the text height is smaller. 489 */ 490 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 491 int vspace = mTextView.getBottom() - mTextView.getTop() - 492 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 493 494 final Drawables dr = mTextView.mDrawables; 495 496 final int layoutDirection = mTextView.getLayoutDirection(); 497 int height; 498 switch (layoutDirection) { 499 default: 500 case View.LAYOUT_DIRECTION_LTR: 501 height = (dr != null ? dr.mDrawableHeightRight : 0); 502 break; 503 case View.LAYOUT_DIRECTION_RTL: 504 height = (dr != null ? dr.mDrawableHeightLeft : 0); 505 break; 506 } 507 508 int icontop = compoundPaddingTop + (vspace - height) / 2; 509 510 /* 511 * The "2" is the distance between the point and the top edge 512 * of the background. 513 */ 514 final float scale = mTextView.getResources().getDisplayMetrics().density; 515 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 516 } 517 518 void createInputContentTypeIfNeeded() { 519 if (mInputContentType == null) { 520 mInputContentType = new InputContentType(); 521 } 522 } 523 524 void createInputMethodStateIfNeeded() { 525 if (mInputMethodState == null) { 526 mInputMethodState = new InputMethodState(); 527 } 528 } 529 530 boolean isCursorVisible() { 531 // The default value is true, even when there is no associated Editor 532 return mCursorVisible && mTextView.isTextEditable(); 533 } 534 535 void prepareCursorControllers() { 536 boolean windowSupportsHandles = false; 537 538 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 539 if (params instanceof WindowManager.LayoutParams) { 540 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 541 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 542 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 543 } 544 545 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 546 mInsertionControllerEnabled = enabled && isCursorVisible(); 547 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 548 549 if (!mInsertionControllerEnabled) { 550 hideInsertionPointCursorController(); 551 if (mInsertionPointCursorController != null) { 552 mInsertionPointCursorController.onDetached(); 553 mInsertionPointCursorController = null; 554 } 555 } 556 557 if (!mSelectionControllerEnabled) { 558 stopSelectionActionMode(); 559 if (mSelectionModifierCursorController != null) { 560 mSelectionModifierCursorController.onDetached(); 561 mSelectionModifierCursorController = null; 562 } 563 } 564 } 565 566 void hideInsertionPointCursorController() { 567 if (mInsertionPointCursorController != null) { 568 mInsertionPointCursorController.hide(); 569 } 570 } 571 572 /** 573 * Hides the insertion controller and stops text selection mode, hiding the selection controller 574 */ 575 void hideControllers() { 576 hideCursorControllers(); 577 hideSpanControllers(); 578 } 579 580 private void hideSpanControllers() { 581 if (mSpanController != null) { 582 mSpanController.hide(); 583 } 584 } 585 586 private void hideCursorControllers() { 587 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 588 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 589 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 590 // to distinguish one from the other. 591 if (mSuggestionsPopupWindow != null && ((mTextView instanceof ExtractEditText) || 592 !mSuggestionsPopupWindow.isShowingUp())) { 593 // Should be done before hide insertion point controller since it triggers a show of it 594 mSuggestionsPopupWindow.hide(); 595 } 596 hideInsertionPointCursorController(); 597 stopSelectionActionMode(); 598 } 599 600 /** 601 * Create new SpellCheckSpans on the modified region. 602 */ 603 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 604 // Remove spans whose adjacent characters are text not punctuation 605 mTextView.removeAdjacentSuggestionSpans(start); 606 mTextView.removeAdjacentSuggestionSpans(end); 607 608 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 609 !(mTextView instanceof ExtractEditText)) { 610 if (mSpellChecker == null && createSpellChecker) { 611 mSpellChecker = new SpellChecker(mTextView); 612 } 613 if (mSpellChecker != null) { 614 mSpellChecker.spellCheck(start, end); 615 } 616 } 617 } 618 619 void onScreenStateChanged(int screenState) { 620 switch (screenState) { 621 case View.SCREEN_STATE_ON: 622 resumeBlink(); 623 break; 624 case View.SCREEN_STATE_OFF: 625 suspendBlink(); 626 break; 627 } 628 } 629 630 private void suspendBlink() { 631 if (mBlink != null) { 632 mBlink.cancel(); 633 } 634 } 635 636 private void resumeBlink() { 637 if (mBlink != null) { 638 mBlink.uncancel(); 639 makeBlink(); 640 } 641 } 642 643 void adjustInputType(boolean password, boolean passwordInputType, 644 boolean webPasswordInputType, boolean numberPasswordInputType) { 645 // mInputType has been set from inputType, possibly modified by mInputMethod. 646 // Specialize mInputType to [web]password if we have a text class and the original input 647 // type was a password. 648 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 649 if (password || passwordInputType) { 650 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 651 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 652 } 653 if (webPasswordInputType) { 654 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 655 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 656 } 657 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 658 if (numberPasswordInputType) { 659 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 660 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 661 } 662 } 663 } 664 665 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 666 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 667 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 668 669 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 670 com.android.internal.R.dimen.textview_error_popup_default_width); 671 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 672 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 673 float max = 0; 674 for (int i = 0; i < l.getLineCount(); i++) { 675 max = Math.max(max, l.getLineWidth(i)); 676 } 677 678 /* 679 * Now set the popup size to be big enough for the text plus the border capped 680 * to DEFAULT_MAX_POPUP_WIDTH 681 */ 682 pop.setWidth(wid + (int) Math.ceil(max)); 683 pop.setHeight(ht + l.getHeight()); 684 } 685 686 void setFrame() { 687 if (mErrorPopup != null) { 688 TextView tv = (TextView) mErrorPopup.getContentView(); 689 chooseSize(mErrorPopup, mError, tv); 690 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 691 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 692 } 693 } 694 695 private int getWordStart(int offset) { 696 // FIXME - For this and similar methods we're not doing anything to check if there's 697 // a LocaleSpan in the text, this may be something we should try handling or checking for. 698 int retOffset = getWordIteratorWithText().prevBoundary(offset); 699 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 700 // On punctuation boundary or within group of punctuation, find punctuation start. 701 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 702 } else { 703 // Not on a punctuation boundary, find the word start. 704 retOffset = getWordIteratorWithText().getBeginning(offset); 705 } 706 if (retOffset == BreakIterator.DONE) { 707 return offset; 708 } 709 return retOffset; 710 } 711 712 private int getWordEnd(int offset) { 713 int retOffset = getWordIteratorWithText().nextBoundary(offset); 714 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 715 // On punctuation boundary or within group of punctuation, find punctuation end. 716 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 717 } else { 718 // Not on a punctuation boundary, find the word end. 719 retOffset = getWordIteratorWithText().getEnd(offset); 720 } 721 if (retOffset == BreakIterator.DONE) { 722 return offset; 723 } 724 return retOffset; 725 } 726 727 /** 728 * Adjusts selection to the word under last touch offset. Return true if the operation was 729 * successfully performed. 730 */ 731 private boolean selectCurrentWord() { 732 if (!mTextView.canSelectText()) { 733 return false; 734 } 735 736 if (mTextView.hasPasswordTransformationMethod()) { 737 // Always select all on a password field. 738 // Cut/copy menu entries are not available for passwords, but being able to select all 739 // is however useful to delete or paste to replace the entire content. 740 return mTextView.selectAllText(); 741 } 742 743 int inputType = mTextView.getInputType(); 744 int klass = inputType & InputType.TYPE_MASK_CLASS; 745 int variation = inputType & InputType.TYPE_MASK_VARIATION; 746 747 // Specific text field types: select the entire text for these 748 if (klass == InputType.TYPE_CLASS_NUMBER || 749 klass == InputType.TYPE_CLASS_PHONE || 750 klass == InputType.TYPE_CLASS_DATETIME || 751 variation == InputType.TYPE_TEXT_VARIATION_URI || 752 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 753 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 754 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 755 return mTextView.selectAllText(); 756 } 757 758 long lastTouchOffsets = getLastTouchOffsets(); 759 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 760 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 761 762 // Safety check in case standard touch event handling has been bypassed 763 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 764 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 765 766 int selectionStart, selectionEnd; 767 768 // If a URLSpan (web address, email, phone...) is found at that position, select it. 769 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 770 getSpans(minOffset, maxOffset, URLSpan.class); 771 if (urlSpans.length >= 1) { 772 URLSpan urlSpan = urlSpans[0]; 773 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 774 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 775 } else { 776 // FIXME - We should check if there's a LocaleSpan in the text, this may be 777 // something we should try handling or checking for. 778 final WordIterator wordIterator = getWordIterator(); 779 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 780 781 selectionStart = wordIterator.getBeginning(minOffset); 782 selectionEnd = wordIterator.getEnd(maxOffset); 783 784 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 785 selectionStart == selectionEnd) { 786 // Possible when the word iterator does not properly handle the text's language 787 long range = getCharClusterRange(minOffset); 788 selectionStart = TextUtils.unpackRangeStartFromLong(range); 789 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 790 } 791 } 792 793 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 794 return selectionEnd > selectionStart; 795 } 796 797 void onLocaleChanged() { 798 // Will be re-created on demand in getWordIterator with the proper new locale 799 mWordIterator = null; 800 mWordIteratorWithText = null; 801 } 802 803 /** 804 * @hide 805 */ 806 public WordIterator getWordIterator() { 807 if (mWordIterator == null) { 808 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 809 } 810 return mWordIterator; 811 } 812 813 private WordIterator getWordIteratorWithText() { 814 if (mWordIteratorWithText == null) { 815 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 816 mUpdateWordIteratorText = true; 817 } 818 if (mUpdateWordIteratorText) { 819 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 820 // to the user's selection is needed. A possible solution would be to 821 // copy some number N of characters near the selection and then when the 822 // user approaches N then we'd do another copy of the next N characters. 823 CharSequence text = mTextView.getText(); 824 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 825 mUpdateWordIteratorText = false; 826 } 827 return mWordIteratorWithText; 828 } 829 830 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 831 final Layout layout = mTextView.getLayout(); 832 if (layout == null) return offset; 833 final CharSequence text = mTextView.getText(); 834 final int nextOffset = layout.getPaint().getTextRunCursor(text, 0, text.length(), 835 layout.isRtlCharAt(offset) ? Paint.DIRECTION_RTL : Paint.DIRECTION_LTR, 836 offset, findAfterGivenOffset ? Paint.CURSOR_AFTER : Paint.CURSOR_BEFORE); 837 return nextOffset == -1 ? offset : nextOffset; 838 } 839 840 private long getCharClusterRange(int offset) { 841 final int textLength = mTextView.getText().length(); 842 if (offset < textLength) { 843 return TextUtils.packRangeInLong(offset, getNextCursorOffset(offset, true)); 844 } 845 if (offset - 1 >= 0) { 846 return TextUtils.packRangeInLong(getNextCursorOffset(offset, false), offset); 847 } 848 return TextUtils.packRangeInLong(offset, offset); 849 } 850 851 private boolean touchPositionIsInSelection() { 852 int selectionStart = mTextView.getSelectionStart(); 853 int selectionEnd = mTextView.getSelectionEnd(); 854 855 if (selectionStart == selectionEnd) { 856 return false; 857 } 858 859 if (selectionStart > selectionEnd) { 860 int tmp = selectionStart; 861 selectionStart = selectionEnd; 862 selectionEnd = tmp; 863 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 864 } 865 866 SelectionModifierCursorController selectionController = getSelectionController(); 867 int minOffset = selectionController.getMinTouchOffset(); 868 int maxOffset = selectionController.getMaxTouchOffset(); 869 870 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 871 } 872 873 private PositionListener getPositionListener() { 874 if (mPositionListener == null) { 875 mPositionListener = new PositionListener(); 876 } 877 return mPositionListener; 878 } 879 880 private interface TextViewPositionListener { 881 public void updatePosition(int parentPositionX, int parentPositionY, 882 boolean parentPositionChanged, boolean parentScrolled); 883 } 884 885 private boolean isPositionVisible(final float positionX, final float positionY) { 886 synchronized (TEMP_POSITION) { 887 final float[] position = TEMP_POSITION; 888 position[0] = positionX; 889 position[1] = positionY; 890 View view = mTextView; 891 892 while (view != null) { 893 if (view != mTextView) { 894 // Local scroll is already taken into account in positionX/Y 895 position[0] -= view.getScrollX(); 896 position[1] -= view.getScrollY(); 897 } 898 899 if (position[0] < 0 || position[1] < 0 || 900 position[0] > view.getWidth() || position[1] > view.getHeight()) { 901 return false; 902 } 903 904 if (!view.getMatrix().isIdentity()) { 905 view.getMatrix().mapPoints(position); 906 } 907 908 position[0] += view.getLeft(); 909 position[1] += view.getTop(); 910 911 final ViewParent parent = view.getParent(); 912 if (parent instanceof View) { 913 view = (View) parent; 914 } else { 915 // We've reached the ViewRoot, stop iterating 916 view = null; 917 } 918 } 919 } 920 921 // We've been able to walk up the view hierarchy and the position was never clipped 922 return true; 923 } 924 925 private boolean isOffsetVisible(int offset) { 926 Layout layout = mTextView.getLayout(); 927 if (layout == null) return false; 928 929 final int line = layout.getLineForOffset(offset); 930 final int lineBottom = layout.getLineBottom(line); 931 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 932 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 933 lineBottom + mTextView.viewportToContentVerticalOffset()); 934 } 935 936 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 937 * in the view. Returns false when the position is in the empty space of left/right of text. 938 */ 939 private boolean isPositionOnText(float x, float y) { 940 Layout layout = mTextView.getLayout(); 941 if (layout == null) return false; 942 943 final int line = mTextView.getLineAtCoordinate(y); 944 x = mTextView.convertToLocalHorizontalCoordinate(x); 945 946 if (x < layout.getLineLeft(line)) return false; 947 if (x > layout.getLineRight(line)) return false; 948 return true; 949 } 950 951 public boolean performLongClick(boolean handled) { 952 // Long press in empty space moves cursor and starts the selection action mode. 953 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 954 mInsertionControllerEnabled) { 955 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 956 mLastDownPositionY); 957 stopSelectionActionMode(); 958 Selection.setSelection((Spannable) mTextView.getText(), offset); 959 getInsertionController().show(); 960 startSelectionActionModeWithoutSelection(); 961 handled = true; 962 } 963 964 if (!handled && mSelectionActionMode != null) { 965 if (touchPositionIsInSelection()) { 966 // Start a drag 967 final int start = mTextView.getSelectionStart(); 968 final int end = mTextView.getSelectionEnd(); 969 CharSequence selectedText = mTextView.getTransformedText(start, end); 970 ClipData data = ClipData.newPlainText(null, selectedText); 971 DragLocalState localState = new DragLocalState(mTextView, start, end); 972 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 973 View.DRAG_FLAG_GLOBAL); 974 stopSelectionActionMode(); 975 } else { 976 stopSelectionActionMode(); 977 startSelectionActionModeWithSelectionAndStartDrag(); 978 } 979 handled = true; 980 } 981 982 // Start a new selection 983 if (!handled) { 984 handled = startSelectionActionModeWithSelectionAndStartDrag(); 985 } 986 987 return handled; 988 } 989 990 private long getLastTouchOffsets() { 991 SelectionModifierCursorController selectionController = getSelectionController(); 992 final int minOffset = selectionController.getMinTouchOffset(); 993 final int maxOffset = selectionController.getMaxTouchOffset(); 994 return TextUtils.packRangeInLong(minOffset, maxOffset); 995 } 996 997 void onFocusChanged(boolean focused, int direction) { 998 mShowCursor = SystemClock.uptimeMillis(); 999 ensureEndedBatchEdit(); 1000 1001 if (focused) { 1002 int selStart = mTextView.getSelectionStart(); 1003 int selEnd = mTextView.getSelectionEnd(); 1004 1005 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1006 // mode for these, unless there was a specific selection already started. 1007 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1008 selEnd == mTextView.getText().length(); 1009 1010 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1011 !isFocusHighlighted; 1012 1013 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1014 // If a tap was used to give focus to that view, move cursor at tap position. 1015 // Has to be done before onTakeFocus, which can be overloaded. 1016 final int lastTapPosition = getLastTapPosition(); 1017 if (lastTapPosition >= 0) { 1018 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1019 } 1020 1021 // Note this may have to be moved out of the Editor class 1022 MovementMethod mMovement = mTextView.getMovementMethod(); 1023 if (mMovement != null) { 1024 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1025 } 1026 1027 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1028 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1029 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1030 // This special case ensure that we keep current selection in that case. 1031 // It would be better to know why the DecorView does not have focus at that time. 1032 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1033 selStart >= 0 && selEnd >= 0) { 1034 /* 1035 * Someone intentionally set the selection, so let them 1036 * do whatever it is that they wanted to do instead of 1037 * the default on-focus behavior. We reset the selection 1038 * here instead of just skipping the onTakeFocus() call 1039 * because some movement methods do something other than 1040 * just setting the selection in theirs and we still 1041 * need to go through that path. 1042 */ 1043 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1044 } 1045 1046 if (mSelectAllOnFocus) { 1047 mTextView.selectAllText(); 1048 } 1049 1050 mTouchFocusSelected = true; 1051 } 1052 1053 mFrozenWithFocus = false; 1054 mSelectionMoved = false; 1055 1056 if (mError != null) { 1057 showError(); 1058 } 1059 1060 makeBlink(); 1061 } else { 1062 if (mError != null) { 1063 hideError(); 1064 } 1065 // Don't leave us in the middle of a batch edit. 1066 mTextView.onEndBatchEdit(); 1067 1068 if (mTextView instanceof ExtractEditText) { 1069 // terminateTextSelectionMode removes selection, which we want to keep when 1070 // ExtractEditText goes out of focus. 1071 final int selStart = mTextView.getSelectionStart(); 1072 final int selEnd = mTextView.getSelectionEnd(); 1073 hideControllers(); 1074 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1075 } else { 1076 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1077 hideControllers(); 1078 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1079 downgradeEasyCorrectionSpans(); 1080 } 1081 1082 // No need to create the controller 1083 if (mSelectionModifierCursorController != null) { 1084 mSelectionModifierCursorController.resetTouchOffsets(); 1085 } 1086 } 1087 } 1088 1089 /** 1090 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1091 * span. 1092 */ 1093 private void downgradeEasyCorrectionSpans() { 1094 CharSequence text = mTextView.getText(); 1095 if (text instanceof Spannable) { 1096 Spannable spannable = (Spannable) text; 1097 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1098 spannable.length(), SuggestionSpan.class); 1099 for (int i = 0; i < suggestionSpans.length; i++) { 1100 int flags = suggestionSpans[i].getFlags(); 1101 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1102 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1103 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1104 suggestionSpans[i].setFlags(flags); 1105 } 1106 } 1107 } 1108 } 1109 1110 void sendOnTextChanged(int start, int after) { 1111 updateSpellCheckSpans(start, start + after, false); 1112 1113 // Flip flag to indicate the word iterator needs to have the text reset. 1114 mUpdateWordIteratorText = true; 1115 1116 // Hide the controllers as soon as text is modified (typing, procedural...) 1117 // We do not hide the span controllers, since they can be added when a new text is 1118 // inserted into the text view (voice IME). 1119 hideCursorControllers(); 1120 } 1121 1122 private int getLastTapPosition() { 1123 // No need to create the controller at that point, no last tap position saved 1124 if (mSelectionModifierCursorController != null) { 1125 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1126 if (lastTapPosition >= 0) { 1127 // Safety check, should not be possible. 1128 if (lastTapPosition > mTextView.getText().length()) { 1129 lastTapPosition = mTextView.getText().length(); 1130 } 1131 return lastTapPosition; 1132 } 1133 } 1134 1135 return -1; 1136 } 1137 1138 void onWindowFocusChanged(boolean hasWindowFocus) { 1139 if (hasWindowFocus) { 1140 if (mBlink != null) { 1141 mBlink.uncancel(); 1142 makeBlink(); 1143 } 1144 } else { 1145 if (mBlink != null) { 1146 mBlink.cancel(); 1147 } 1148 if (mInputContentType != null) { 1149 mInputContentType.enterDown = false; 1150 } 1151 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1152 hideControllers(); 1153 if (mSuggestionsPopupWindow != null) { 1154 mSuggestionsPopupWindow.onParentLostFocus(); 1155 } 1156 1157 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1158 ensureEndedBatchEdit(); 1159 } 1160 } 1161 1162 void onTouchEvent(MotionEvent event) { 1163 if (hasSelectionController()) { 1164 getSelectionController().onTouchEvent(event); 1165 } 1166 1167 if (mShowSuggestionRunnable != null) { 1168 mTextView.removeCallbacks(mShowSuggestionRunnable); 1169 mShowSuggestionRunnable = null; 1170 } 1171 1172 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1173 mLastDownPositionX = event.getX(); 1174 mLastDownPositionY = event.getY(); 1175 1176 // Reset this state; it will be re-set if super.onTouchEvent 1177 // causes focus to move to the view. 1178 mTouchFocusSelected = false; 1179 mIgnoreActionUpEvent = false; 1180 } 1181 } 1182 1183 public void beginBatchEdit() { 1184 mInBatchEditControllers = true; 1185 final InputMethodState ims = mInputMethodState; 1186 if (ims != null) { 1187 int nesting = ++ims.mBatchEditNesting; 1188 if (nesting == 1) { 1189 ims.mCursorChanged = false; 1190 ims.mChangedDelta = 0; 1191 if (ims.mContentChanged) { 1192 // We already have a pending change from somewhere else, 1193 // so turn this into a full update. 1194 ims.mChangedStart = 0; 1195 ims.mChangedEnd = mTextView.getText().length(); 1196 } else { 1197 ims.mChangedStart = EXTRACT_UNKNOWN; 1198 ims.mChangedEnd = EXTRACT_UNKNOWN; 1199 ims.mContentChanged = false; 1200 } 1201 mUndoInputFilter.beginBatchEdit(); 1202 mTextView.onBeginBatchEdit(); 1203 } 1204 } 1205 } 1206 1207 public void endBatchEdit() { 1208 mInBatchEditControllers = false; 1209 final InputMethodState ims = mInputMethodState; 1210 if (ims != null) { 1211 int nesting = --ims.mBatchEditNesting; 1212 if (nesting == 0) { 1213 finishBatchEdit(ims); 1214 } 1215 } 1216 } 1217 1218 void ensureEndedBatchEdit() { 1219 final InputMethodState ims = mInputMethodState; 1220 if (ims != null && ims.mBatchEditNesting != 0) { 1221 ims.mBatchEditNesting = 0; 1222 finishBatchEdit(ims); 1223 } 1224 } 1225 1226 void finishBatchEdit(final InputMethodState ims) { 1227 mTextView.onEndBatchEdit(); 1228 mUndoInputFilter.endBatchEdit(); 1229 1230 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1231 mTextView.updateAfterEdit(); 1232 reportExtractedText(); 1233 } else if (ims.mCursorChanged) { 1234 // Cheesy way to get us to report the current cursor location. 1235 mTextView.invalidateCursor(); 1236 } 1237 // sendUpdateSelection knows to avoid sending if the selection did 1238 // not actually change. 1239 sendUpdateSelection(); 1240 } 1241 1242 static final int EXTRACT_NOTHING = -2; 1243 static final int EXTRACT_UNKNOWN = -1; 1244 1245 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1246 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1247 EXTRACT_UNKNOWN, outText); 1248 } 1249 1250 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1251 int partialStartOffset, int partialEndOffset, int delta, 1252 @Nullable ExtractedText outText) { 1253 if (request == null || outText == null) { 1254 return false; 1255 } 1256 1257 final CharSequence content = mTextView.getText(); 1258 if (content == null) { 1259 return false; 1260 } 1261 1262 if (partialStartOffset != EXTRACT_NOTHING) { 1263 final int N = content.length(); 1264 if (partialStartOffset < 0) { 1265 outText.partialStartOffset = outText.partialEndOffset = -1; 1266 partialStartOffset = 0; 1267 partialEndOffset = N; 1268 } else { 1269 // Now use the delta to determine the actual amount of text 1270 // we need. 1271 partialEndOffset += delta; 1272 // Adjust offsets to ensure we contain full spans. 1273 if (content instanceof Spanned) { 1274 Spanned spanned = (Spanned)content; 1275 Object[] spans = spanned.getSpans(partialStartOffset, 1276 partialEndOffset, ParcelableSpan.class); 1277 int i = spans.length; 1278 while (i > 0) { 1279 i--; 1280 int j = spanned.getSpanStart(spans[i]); 1281 if (j < partialStartOffset) partialStartOffset = j; 1282 j = spanned.getSpanEnd(spans[i]); 1283 if (j > partialEndOffset) partialEndOffset = j; 1284 } 1285 } 1286 outText.partialStartOffset = partialStartOffset; 1287 outText.partialEndOffset = partialEndOffset - delta; 1288 1289 if (partialStartOffset > N) { 1290 partialStartOffset = N; 1291 } else if (partialStartOffset < 0) { 1292 partialStartOffset = 0; 1293 } 1294 if (partialEndOffset > N) { 1295 partialEndOffset = N; 1296 } else if (partialEndOffset < 0) { 1297 partialEndOffset = 0; 1298 } 1299 } 1300 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1301 outText.text = content.subSequence(partialStartOffset, 1302 partialEndOffset); 1303 } else { 1304 outText.text = TextUtils.substring(content, partialStartOffset, 1305 partialEndOffset); 1306 } 1307 } else { 1308 outText.partialStartOffset = 0; 1309 outText.partialEndOffset = 0; 1310 outText.text = ""; 1311 } 1312 outText.flags = 0; 1313 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1314 outText.flags |= ExtractedText.FLAG_SELECTING; 1315 } 1316 if (mTextView.isSingleLine()) { 1317 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1318 } 1319 outText.startOffset = 0; 1320 outText.selectionStart = mTextView.getSelectionStart(); 1321 outText.selectionEnd = mTextView.getSelectionEnd(); 1322 return true; 1323 } 1324 1325 boolean reportExtractedText() { 1326 final Editor.InputMethodState ims = mInputMethodState; 1327 if (ims != null) { 1328 final boolean contentChanged = ims.mContentChanged; 1329 if (contentChanged || ims.mSelectionModeChanged) { 1330 ims.mContentChanged = false; 1331 ims.mSelectionModeChanged = false; 1332 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1333 if (req != null) { 1334 InputMethodManager imm = InputMethodManager.peekInstance(); 1335 if (imm != null) { 1336 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1337 "Retrieving extracted start=" + ims.mChangedStart + 1338 " end=" + ims.mChangedEnd + 1339 " delta=" + ims.mChangedDelta); 1340 if (ims.mChangedStart < 0 && !contentChanged) { 1341 ims.mChangedStart = EXTRACT_NOTHING; 1342 } 1343 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1344 ims.mChangedDelta, ims.mExtractedText)) { 1345 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1346 "Reporting extracted start=" + 1347 ims.mExtractedText.partialStartOffset + 1348 " end=" + ims.mExtractedText.partialEndOffset + 1349 ": " + ims.mExtractedText.text); 1350 1351 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1352 ims.mChangedStart = EXTRACT_UNKNOWN; 1353 ims.mChangedEnd = EXTRACT_UNKNOWN; 1354 ims.mChangedDelta = 0; 1355 ims.mContentChanged = false; 1356 return true; 1357 } 1358 } 1359 } 1360 } 1361 } 1362 return false; 1363 } 1364 1365 private void sendUpdateSelection() { 1366 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1367 final InputMethodManager imm = InputMethodManager.peekInstance(); 1368 if (null != imm) { 1369 final int selectionStart = mTextView.getSelectionStart(); 1370 final int selectionEnd = mTextView.getSelectionEnd(); 1371 int candStart = -1; 1372 int candEnd = -1; 1373 if (mTextView.getText() instanceof Spannable) { 1374 final Spannable sp = (Spannable) mTextView.getText(); 1375 candStart = EditableInputConnection.getComposingSpanStart(sp); 1376 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1377 } 1378 // InputMethodManager#updateSelection skips sending the message if 1379 // none of the parameters have changed since the last time we called it. 1380 imm.updateSelection(mTextView, 1381 selectionStart, selectionEnd, candStart, candEnd); 1382 } 1383 } 1384 } 1385 1386 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1387 int cursorOffsetVertical) { 1388 final int selectionStart = mTextView.getSelectionStart(); 1389 final int selectionEnd = mTextView.getSelectionEnd(); 1390 1391 final InputMethodState ims = mInputMethodState; 1392 if (ims != null && ims.mBatchEditNesting == 0) { 1393 InputMethodManager imm = InputMethodManager.peekInstance(); 1394 if (imm != null) { 1395 if (imm.isActive(mTextView)) { 1396 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1397 // We are in extract mode and the content has changed 1398 // in some way... just report complete new text to the 1399 // input method. 1400 reportExtractedText(); 1401 } 1402 } 1403 } 1404 } 1405 1406 if (mCorrectionHighlighter != null) { 1407 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1408 } 1409 1410 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1411 drawCursor(canvas, cursorOffsetVertical); 1412 // Rely on the drawable entirely, do not draw the cursor line. 1413 // Has to be done after the IMM related code above which relies on the highlight. 1414 highlight = null; 1415 } 1416 1417 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1418 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1419 cursorOffsetVertical); 1420 } else { 1421 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1422 } 1423 } 1424 1425 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1426 Paint highlightPaint, int cursorOffsetVertical) { 1427 final long lineRange = layout.getLineRangeForDraw(canvas); 1428 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1429 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1430 if (lastLine < 0) return; 1431 1432 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1433 firstLine, lastLine); 1434 1435 if (layout instanceof DynamicLayout) { 1436 if (mTextRenderNodes == null) { 1437 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1438 } 1439 1440 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1441 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1442 int[] blockIndices = dynamicLayout.getBlockIndices(); 1443 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1444 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1445 1446 int endOfPreviousBlock = -1; 1447 int searchStartIndex = 0; 1448 for (int i = 0; i < numberOfBlocks; i++) { 1449 int blockEndLine = blockEndLines[i]; 1450 int blockIndex = blockIndices[i]; 1451 1452 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1453 if (blockIsInvalid) { 1454 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1455 searchStartIndex); 1456 // Note how dynamic layout's internal block indices get updated from Editor 1457 blockIndices[i] = blockIndex; 1458 if (mTextRenderNodes[blockIndex] != null) { 1459 mTextRenderNodes[blockIndex].isDirty = true; 1460 } 1461 searchStartIndex = blockIndex + 1; 1462 } 1463 1464 if (mTextRenderNodes[blockIndex] == null) { 1465 mTextRenderNodes[blockIndex] = 1466 new TextRenderNode("Text " + blockIndex); 1467 } 1468 1469 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1470 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1471 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1472 final int blockBeginLine = endOfPreviousBlock + 1; 1473 final int top = layout.getLineTop(blockBeginLine); 1474 final int bottom = layout.getLineBottom(blockEndLine); 1475 int left = 0; 1476 int right = mTextView.getWidth(); 1477 if (mTextView.getHorizontallyScrolling()) { 1478 float min = Float.MAX_VALUE; 1479 float max = Float.MIN_VALUE; 1480 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1481 min = Math.min(min, layout.getLineLeft(line)); 1482 max = Math.max(max, layout.getLineRight(line)); 1483 } 1484 left = (int) min; 1485 right = (int) (max + 0.5f); 1486 } 1487 1488 // Rebuild display list if it is invalid 1489 if (blockDisplayListIsInvalid) { 1490 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1491 right - left, bottom - top); 1492 try { 1493 // drawText is always relative to TextView's origin, this translation 1494 // brings this range of text back to the top left corner of the viewport 1495 displayListCanvas.translate(-left, -top); 1496 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1497 mTextRenderNodes[blockIndex].isDirty = false; 1498 // No need to untranslate, previous context is popped after 1499 // drawDisplayList 1500 } finally { 1501 blockDisplayList.end(displayListCanvas); 1502 // Same as drawDisplayList below, handled by our TextView's parent 1503 blockDisplayList.setClipToBounds(false); 1504 } 1505 } 1506 1507 // Valid disply list whose index is >= indexFirstChangedBlock 1508 // only needs to update its drawing location. 1509 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1510 } 1511 1512 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1513 1514 endOfPreviousBlock = blockEndLine; 1515 } 1516 1517 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1518 } else { 1519 // Boring layout is used for empty and hint text 1520 layout.drawText(canvas, firstLine, lastLine); 1521 } 1522 } 1523 1524 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1525 int searchStartIndex) { 1526 int length = mTextRenderNodes.length; 1527 for (int i = searchStartIndex; i < length; i++) { 1528 boolean blockIndexFound = false; 1529 for (int j = 0; j < numberOfBlocks; j++) { 1530 if (blockIndices[j] == i) { 1531 blockIndexFound = true; 1532 break; 1533 } 1534 } 1535 if (blockIndexFound) continue; 1536 return i; 1537 } 1538 1539 // No available index found, the pool has to grow 1540 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1541 return length; 1542 } 1543 1544 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1545 final boolean translate = cursorOffsetVertical != 0; 1546 if (translate) canvas.translate(0, cursorOffsetVertical); 1547 for (int i = 0; i < mCursorCount; i++) { 1548 mCursorDrawable[i].draw(canvas); 1549 } 1550 if (translate) canvas.translate(0, -cursorOffsetVertical); 1551 } 1552 1553 /** 1554 * Invalidates all the sub-display lists that overlap the specified character range 1555 */ 1556 void invalidateTextDisplayList(Layout layout, int start, int end) { 1557 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1558 final int firstLine = layout.getLineForOffset(start); 1559 final int lastLine = layout.getLineForOffset(end); 1560 1561 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1562 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1563 int[] blockIndices = dynamicLayout.getBlockIndices(); 1564 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1565 1566 int i = 0; 1567 // Skip the blocks before firstLine 1568 while (i < numberOfBlocks) { 1569 if (blockEndLines[i] >= firstLine) break; 1570 i++; 1571 } 1572 1573 // Invalidate all subsequent blocks until lastLine is passed 1574 while (i < numberOfBlocks) { 1575 final int blockIndex = blockIndices[i]; 1576 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1577 mTextRenderNodes[blockIndex].isDirty = true; 1578 } 1579 if (blockEndLines[i] >= lastLine) break; 1580 i++; 1581 } 1582 } 1583 } 1584 1585 void invalidateTextDisplayList() { 1586 if (mTextRenderNodes != null) { 1587 for (int i = 0; i < mTextRenderNodes.length; i++) { 1588 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1589 } 1590 } 1591 } 1592 1593 void updateCursorsPositions() { 1594 if (mTextView.mCursorDrawableRes == 0) { 1595 mCursorCount = 0; 1596 return; 1597 } 1598 1599 Layout layout = mTextView.getLayout(); 1600 Layout hintLayout = mTextView.getHintLayout(); 1601 final int offset = mTextView.getSelectionStart(); 1602 final int line = layout.getLineForOffset(offset); 1603 final int top = layout.getLineTop(line); 1604 final int bottom = layout.getLineTop(line + 1); 1605 1606 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1607 1608 int middle = bottom; 1609 if (mCursorCount == 2) { 1610 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1611 middle = (top + bottom) >> 1; 1612 } 1613 1614 boolean clamped = layout.shouldClampCursor(line); 1615 updateCursorPosition(0, top, middle, 1616 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1617 1618 if (mCursorCount == 2) { 1619 updateCursorPosition(1, middle, bottom, 1620 layout.getSecondaryHorizontal(offset, clamped)); 1621 } 1622 } 1623 1624 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1625 boolean clamped) { 1626 if (TextUtils.isEmpty(layout.getText()) && 1627 hintLayout != null && 1628 !TextUtils.isEmpty(hintLayout.getText())) { 1629 return hintLayout.getPrimaryHorizontal(offset, clamped); 1630 } else { 1631 return layout.getPrimaryHorizontal(offset, clamped); 1632 } 1633 } 1634 1635 /** 1636 * @return true if the selection mode was actually started. 1637 */ 1638 private boolean startSelectionActionModeWithoutSelection() { 1639 if (mSelectionActionMode != null) { 1640 // Selection action mode is already started 1641 // TODO: revisit invocations to minimize this case. 1642 mSelectionActionMode.invalidate(); 1643 return false; 1644 } 1645 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1646 mSelectionActionMode = mTextView.startActionMode( 1647 actionModeCallback, ActionMode.TYPE_FLOATING); 1648 return mSelectionActionMode != null; 1649 } 1650 1651 /** 1652 * Starts a Selection Action Mode with the current selection and enters drag mode. This should 1653 * be used whenever the mode is started from a touch event. 1654 * 1655 * @return true if the selection mode was actually started. 1656 */ 1657 private boolean startSelectionActionModeWithSelectionAndStartDrag() { 1658 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1659 if (selectionStarted) { 1660 getSelectionController().enterDrag(); 1661 } 1662 return selectionStarted; 1663 } 1664 1665 /** 1666 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1667 * are shown. This should be used when the mode is started from a non-touch event. 1668 * 1669 * @return true if the selection mode was actually started. 1670 */ 1671 boolean startSelectionActionModeWithSelection() { 1672 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1673 if (selectionStarted) { 1674 getSelectionController().show(); 1675 } 1676 return selectionStarted; 1677 } 1678 1679 private boolean startSelectionActionModeWithSelectionInternal() { 1680 if (mSelectionActionMode != null) { 1681 // Selection action mode is already started 1682 mSelectionActionMode.invalidate(); 1683 return false; 1684 } 1685 1686 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1687 Log.w(TextView.LOG_TAG, 1688 "TextView does not support text selection. Action mode cancelled."); 1689 return false; 1690 } 1691 1692 if (!mTextView.hasSelection()) { 1693 // There may already be a selection on device rotation 1694 if (!selectCurrentWord()) { 1695 // No word found under cursor or text selection not permitted. 1696 return false; 1697 } 1698 } 1699 1700 boolean willExtract = extractedTextModeWillBeStarted(); 1701 1702 // Do not start the action mode when extracted text will show up full screen, which would 1703 // immediately hide the newly created action bar and would be visually distracting. 1704 if (!willExtract) { 1705 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1706 mSelectionActionMode = mTextView.startActionMode( 1707 actionModeCallback, ActionMode.TYPE_FLOATING); 1708 } 1709 1710 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1711 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1712 // Show the IME to be able to replace text, except when selecting non editable text. 1713 final InputMethodManager imm = InputMethodManager.peekInstance(); 1714 if (imm != null) { 1715 imm.showSoftInput(mTextView, 0, null); 1716 } 1717 } 1718 return selectionStarted; 1719 } 1720 1721 private boolean extractedTextModeWillBeStarted() { 1722 if (!(mTextView instanceof ExtractEditText)) { 1723 final InputMethodManager imm = InputMethodManager.peekInstance(); 1724 return imm != null && imm.isFullscreenMode(); 1725 } 1726 return false; 1727 } 1728 1729 /** 1730 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1731 * the current cursor position or selection range. This method is consistent with the 1732 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1733 */ 1734 private boolean shouldOfferToShowSuggestions() { 1735 CharSequence text = mTextView.getText(); 1736 if (!(text instanceof Spannable)) return false; 1737 1738 final Spannable spannable = (Spannable) text; 1739 final int selectionStart = mTextView.getSelectionStart(); 1740 final int selectionEnd = mTextView.getSelectionEnd(); 1741 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1742 SuggestionSpan.class); 1743 if (suggestionSpans.length == 0) { 1744 return false; 1745 } 1746 if (selectionStart == selectionEnd) { 1747 // Spans overlap the cursor. 1748 return true; 1749 } 1750 int minSpanStart = mTextView.getText().length(); 1751 int maxSpanEnd = 0; 1752 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1753 int unionOfSpansCoveringSelectionStartEnd = 0; 1754 for (int i = 0; i < suggestionSpans.length; i++) { 1755 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1756 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1757 minSpanStart = Math.min(minSpanStart, spanStart); 1758 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1759 if (selectionStart < spanStart || selectionStart > spanEnd) { 1760 // The span doesn't cover the current selection start point. 1761 continue; 1762 } 1763 unionOfSpansCoveringSelectionStartStart = 1764 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1765 unionOfSpansCoveringSelectionStartEnd = 1766 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1767 } 1768 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1769 // No spans cover the selection start point. 1770 return false; 1771 } 1772 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1773 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1774 // There is a span that is not covered by the union. In this case, we soouldn't offer 1775 // to show suggestions as it's confusing. 1776 return false; 1777 } 1778 return true; 1779 } 1780 1781 /** 1782 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1783 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1784 */ 1785 private boolean isCursorInsideEasyCorrectionSpan() { 1786 Spannable spannable = (Spannable) mTextView.getText(); 1787 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1788 mTextView.getSelectionEnd(), SuggestionSpan.class); 1789 for (int i = 0; i < suggestionSpans.length; i++) { 1790 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1791 return true; 1792 } 1793 } 1794 return false; 1795 } 1796 1797 void onTouchUpEvent(MotionEvent event) { 1798 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1799 hideControllers(); 1800 CharSequence text = mTextView.getText(); 1801 if (!selectAllGotFocus && text.length() > 0) { 1802 // Move cursor 1803 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1804 Selection.setSelection((Spannable) text, offset); 1805 if (mSpellChecker != null) { 1806 // When the cursor moves, the word that was typed may need spell check 1807 mSpellChecker.onSelectionChanged(); 1808 } 1809 if (!extractedTextModeWillBeStarted()) { 1810 if (isCursorInsideEasyCorrectionSpan()) { 1811 mShowSuggestionRunnable = new Runnable() { 1812 public void run() { 1813 showSuggestions(); 1814 } 1815 }; 1816 // removeCallbacks is performed on every touch 1817 mTextView.postDelayed(mShowSuggestionRunnable, 1818 ViewConfiguration.getDoubleTapTimeout()); 1819 } else if (hasInsertionController()) { 1820 getInsertionController().show(); 1821 } 1822 } 1823 } 1824 } 1825 1826 protected void stopSelectionActionMode() { 1827 if (mSelectionActionMode != null) { 1828 // This will hide the mSelectionModifierCursorController 1829 mSelectionActionMode.finish(); 1830 } 1831 } 1832 1833 /** 1834 * @return True if this view supports insertion handles. 1835 */ 1836 boolean hasInsertionController() { 1837 return mInsertionControllerEnabled; 1838 } 1839 1840 /** 1841 * @return True if this view supports selection handles. 1842 */ 1843 boolean hasSelectionController() { 1844 return mSelectionControllerEnabled; 1845 } 1846 1847 InsertionPointCursorController getInsertionController() { 1848 if (!mInsertionControllerEnabled) { 1849 return null; 1850 } 1851 1852 if (mInsertionPointCursorController == null) { 1853 mInsertionPointCursorController = new InsertionPointCursorController(); 1854 1855 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1856 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1857 } 1858 1859 return mInsertionPointCursorController; 1860 } 1861 1862 SelectionModifierCursorController getSelectionController() { 1863 if (!mSelectionControllerEnabled) { 1864 return null; 1865 } 1866 1867 if (mSelectionModifierCursorController == null) { 1868 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1869 1870 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1871 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1872 } 1873 1874 return mSelectionModifierCursorController; 1875 } 1876 1877 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1878 if (mCursorDrawable[cursorIndex] == null) 1879 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1880 mTextView.mCursorDrawableRes); 1881 1882 if (mTempRect == null) mTempRect = new Rect(); 1883 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1884 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1885 horizontal = Math.max(0.5f, horizontal - 0.5f); 1886 final int left = (int) (horizontal) - mTempRect.left; 1887 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1888 bottom + mTempRect.bottom); 1889 } 1890 1891 /** 1892 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1893 * a dictionary) from the current input method, provided by it calling 1894 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1895 * implementation flashes the background of the corrected word to provide feedback to the user. 1896 * 1897 * @param info The auto correct info about the text that was corrected. 1898 */ 1899 public void onCommitCorrection(CorrectionInfo info) { 1900 if (mCorrectionHighlighter == null) { 1901 mCorrectionHighlighter = new CorrectionHighlighter(); 1902 } else { 1903 mCorrectionHighlighter.invalidate(false); 1904 } 1905 1906 mCorrectionHighlighter.highlight(info); 1907 } 1908 1909 void showSuggestions() { 1910 if (mSuggestionsPopupWindow == null) { 1911 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1912 } 1913 hideControllers(); 1914 mSuggestionsPopupWindow.show(); 1915 } 1916 1917 void onScrollChanged() { 1918 if (mPositionListener != null) { 1919 mPositionListener.onScrollChanged(); 1920 } 1921 if (mSelectionActionMode != null) { 1922 mSelectionActionMode.invalidateContentRect(); 1923 } 1924 } 1925 1926 /** 1927 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1928 */ 1929 private boolean shouldBlink() { 1930 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1931 1932 final int start = mTextView.getSelectionStart(); 1933 if (start < 0) return false; 1934 1935 final int end = mTextView.getSelectionEnd(); 1936 if (end < 0) return false; 1937 1938 return start == end; 1939 } 1940 1941 void makeBlink() { 1942 if (shouldBlink()) { 1943 mShowCursor = SystemClock.uptimeMillis(); 1944 if (mBlink == null) mBlink = new Blink(); 1945 mBlink.removeCallbacks(mBlink); 1946 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 1947 } else { 1948 if (mBlink != null) mBlink.removeCallbacks(mBlink); 1949 } 1950 } 1951 1952 private class Blink extends Handler implements Runnable { 1953 private boolean mCancelled; 1954 1955 public void run() { 1956 if (mCancelled) { 1957 return; 1958 } 1959 1960 removeCallbacks(Blink.this); 1961 1962 if (shouldBlink()) { 1963 if (mTextView.getLayout() != null) { 1964 mTextView.invalidateCursorPath(); 1965 } 1966 1967 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 1968 } 1969 } 1970 1971 void cancel() { 1972 if (!mCancelled) { 1973 removeCallbacks(Blink.this); 1974 mCancelled = true; 1975 } 1976 } 1977 1978 void uncancel() { 1979 mCancelled = false; 1980 } 1981 } 1982 1983 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 1984 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 1985 com.android.internal.R.layout.text_drag_thumbnail, null); 1986 1987 if (shadowView == null) { 1988 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 1989 } 1990 1991 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 1992 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 1993 } 1994 shadowView.setText(text); 1995 shadowView.setTextColor(mTextView.getTextColors()); 1996 1997 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 1998 shadowView.setGravity(Gravity.CENTER); 1999 2000 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2001 ViewGroup.LayoutParams.WRAP_CONTENT)); 2002 2003 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2004 shadowView.measure(size, size); 2005 2006 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2007 shadowView.invalidate(); 2008 return new DragShadowBuilder(shadowView); 2009 } 2010 2011 private static class DragLocalState { 2012 public TextView sourceTextView; 2013 public int start, end; 2014 2015 public DragLocalState(TextView sourceTextView, int start, int end) { 2016 this.sourceTextView = sourceTextView; 2017 this.start = start; 2018 this.end = end; 2019 } 2020 } 2021 2022 void onDrop(DragEvent event) { 2023 StringBuilder content = new StringBuilder(""); 2024 ClipData clipData = event.getClipData(); 2025 final int itemCount = clipData.getItemCount(); 2026 for (int i=0; i < itemCount; i++) { 2027 Item item = clipData.getItemAt(i); 2028 content.append(item.coerceToStyledText(mTextView.getContext())); 2029 } 2030 2031 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2032 2033 Object localState = event.getLocalState(); 2034 DragLocalState dragLocalState = null; 2035 if (localState instanceof DragLocalState) { 2036 dragLocalState = (DragLocalState) localState; 2037 } 2038 boolean dragDropIntoItself = dragLocalState != null && 2039 dragLocalState.sourceTextView == mTextView; 2040 2041 if (dragDropIntoItself) { 2042 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2043 // A drop inside the original selection discards the drop. 2044 return; 2045 } 2046 } 2047 2048 final int originalLength = mTextView.getText().length(); 2049 int min = offset; 2050 int max = offset; 2051 2052 Selection.setSelection((Spannable) mTextView.getText(), max); 2053 mTextView.replaceText_internal(min, max, content); 2054 2055 if (dragDropIntoItself) { 2056 int dragSourceStart = dragLocalState.start; 2057 int dragSourceEnd = dragLocalState.end; 2058 if (max <= dragSourceStart) { 2059 // Inserting text before selection has shifted positions 2060 final int shift = mTextView.getText().length() - originalLength; 2061 dragSourceStart += shift; 2062 dragSourceEnd += shift; 2063 } 2064 2065 // Delete original selection 2066 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2067 2068 // Make sure we do not leave two adjacent spaces. 2069 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2070 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2071 if (nextCharIdx > prevCharIdx + 1) { 2072 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2073 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2074 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2075 } 2076 } 2077 } 2078 } 2079 2080 public void addSpanWatchers(Spannable text) { 2081 final int textLength = text.length(); 2082 2083 if (mKeyListener != null) { 2084 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2085 } 2086 2087 if (mSpanController == null) { 2088 mSpanController = new SpanController(); 2089 } 2090 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2091 } 2092 2093 /** 2094 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2095 * pop-up should be displayed. 2096 * Also monitors {@link Selection} to call back to the attached input method. 2097 */ 2098 class SpanController implements SpanWatcher { 2099 2100 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2101 2102 private EasyEditPopupWindow mPopupWindow; 2103 2104 private Runnable mHidePopup; 2105 2106 // This function is pure but inner classes can't have static functions 2107 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2108 final Object span) { 2109 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2110 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2111 } 2112 2113 @Override 2114 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2115 if (isNonIntermediateSelectionSpan(text, span)) { 2116 sendUpdateSelection(); 2117 } else if (span instanceof EasyEditSpan) { 2118 if (mPopupWindow == null) { 2119 mPopupWindow = new EasyEditPopupWindow(); 2120 mHidePopup = new Runnable() { 2121 @Override 2122 public void run() { 2123 hide(); 2124 } 2125 }; 2126 } 2127 2128 // Make sure there is only at most one EasyEditSpan in the text 2129 if (mPopupWindow.mEasyEditSpan != null) { 2130 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2131 } 2132 2133 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2134 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2135 @Override 2136 public void onDeleteClick(EasyEditSpan span) { 2137 Editable editable = (Editable) mTextView.getText(); 2138 int start = editable.getSpanStart(span); 2139 int end = editable.getSpanEnd(span); 2140 if (start >= 0 && end >= 0) { 2141 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2142 mTextView.deleteText_internal(start, end); 2143 } 2144 editable.removeSpan(span); 2145 } 2146 }); 2147 2148 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2149 // The window is not visible yet, ignore the text change. 2150 return; 2151 } 2152 2153 if (mTextView.getLayout() == null) { 2154 // The view has not been laid out yet, ignore the text change 2155 return; 2156 } 2157 2158 if (extractedTextModeWillBeStarted()) { 2159 // The input is in extract mode. Do not handle the easy edit in 2160 // the original TextView, as the ExtractEditText will do 2161 return; 2162 } 2163 2164 mPopupWindow.show(); 2165 mTextView.removeCallbacks(mHidePopup); 2166 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2167 } 2168 } 2169 2170 @Override 2171 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2172 if (isNonIntermediateSelectionSpan(text, span)) { 2173 sendUpdateSelection(); 2174 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2175 hide(); 2176 } 2177 } 2178 2179 @Override 2180 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2181 int newStart, int newEnd) { 2182 if (isNonIntermediateSelectionSpan(text, span)) { 2183 sendUpdateSelection(); 2184 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2185 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2186 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2187 text.removeSpan(easyEditSpan); 2188 } 2189 } 2190 2191 public void hide() { 2192 if (mPopupWindow != null) { 2193 mPopupWindow.hide(); 2194 mTextView.removeCallbacks(mHidePopup); 2195 } 2196 } 2197 2198 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2199 try { 2200 PendingIntent pendingIntent = span.getPendingIntent(); 2201 if (pendingIntent != null) { 2202 Intent intent = new Intent(); 2203 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2204 pendingIntent.send(mTextView.getContext(), 0, intent); 2205 } 2206 } catch (CanceledException e) { 2207 // This should not happen, as we should try to send the intent only once. 2208 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2209 } 2210 } 2211 } 2212 2213 /** 2214 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2215 */ 2216 private interface EasyEditDeleteListener { 2217 2218 /** 2219 * Clicks the delete pop-up. 2220 */ 2221 void onDeleteClick(EasyEditSpan span); 2222 } 2223 2224 /** 2225 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2226 * by {@link SpanController}. 2227 */ 2228 private class EasyEditPopupWindow extends PinnedPopupWindow 2229 implements OnClickListener { 2230 private static final int POPUP_TEXT_LAYOUT = 2231 com.android.internal.R.layout.text_edit_action_popup_text; 2232 private TextView mDeleteTextView; 2233 private EasyEditSpan mEasyEditSpan; 2234 private EasyEditDeleteListener mOnDeleteListener; 2235 2236 @Override 2237 protected void createPopupWindow() { 2238 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2239 com.android.internal.R.attr.textSelectHandleWindowStyle); 2240 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2241 mPopupWindow.setClippingEnabled(true); 2242 } 2243 2244 @Override 2245 protected void initContentView() { 2246 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2247 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2248 mContentView = linearLayout; 2249 mContentView.setBackgroundResource( 2250 com.android.internal.R.drawable.text_edit_side_paste_window); 2251 2252 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2253 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2254 2255 LayoutParams wrapContent = new LayoutParams( 2256 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2257 2258 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2259 mDeleteTextView.setLayoutParams(wrapContent); 2260 mDeleteTextView.setText(com.android.internal.R.string.delete); 2261 mDeleteTextView.setOnClickListener(this); 2262 mContentView.addView(mDeleteTextView); 2263 } 2264 2265 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2266 mEasyEditSpan = easyEditSpan; 2267 } 2268 2269 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2270 mOnDeleteListener = listener; 2271 } 2272 2273 @Override 2274 public void onClick(View view) { 2275 if (view == mDeleteTextView 2276 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2277 && mOnDeleteListener != null) { 2278 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2279 } 2280 } 2281 2282 @Override 2283 public void hide() { 2284 if (mEasyEditSpan != null) { 2285 mEasyEditSpan.setDeleteEnabled(false); 2286 } 2287 mOnDeleteListener = null; 2288 super.hide(); 2289 } 2290 2291 @Override 2292 protected int getTextOffset() { 2293 // Place the pop-up at the end of the span 2294 Editable editable = (Editable) mTextView.getText(); 2295 return editable.getSpanEnd(mEasyEditSpan); 2296 } 2297 2298 @Override 2299 protected int getVerticalLocalPosition(int line) { 2300 return mTextView.getLayout().getLineBottom(line); 2301 } 2302 2303 @Override 2304 protected int clipVertically(int positionY) { 2305 // As we display the pop-up below the span, no vertical clipping is required. 2306 return positionY; 2307 } 2308 } 2309 2310 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2311 // 3 handles 2312 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2313 // 1 CursorAnchorInfoNotifier 2314 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2315 private TextViewPositionListener[] mPositionListeners = 2316 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2317 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2318 private boolean mPositionHasChanged = true; 2319 // Absolute position of the TextView with respect to its parent window 2320 private int mPositionX, mPositionY; 2321 private int mNumberOfListeners; 2322 private boolean mScrollHasChanged; 2323 final int[] mTempCoords = new int[2]; 2324 2325 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2326 if (mNumberOfListeners == 0) { 2327 updatePosition(); 2328 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2329 vto.addOnPreDrawListener(this); 2330 } 2331 2332 int emptySlotIndex = -1; 2333 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2334 TextViewPositionListener listener = mPositionListeners[i]; 2335 if (listener == positionListener) { 2336 return; 2337 } else if (emptySlotIndex < 0 && listener == null) { 2338 emptySlotIndex = i; 2339 } 2340 } 2341 2342 mPositionListeners[emptySlotIndex] = positionListener; 2343 mCanMove[emptySlotIndex] = canMove; 2344 mNumberOfListeners++; 2345 } 2346 2347 public void removeSubscriber(TextViewPositionListener positionListener) { 2348 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2349 if (mPositionListeners[i] == positionListener) { 2350 mPositionListeners[i] = null; 2351 mNumberOfListeners--; 2352 break; 2353 } 2354 } 2355 2356 if (mNumberOfListeners == 0) { 2357 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2358 vto.removeOnPreDrawListener(this); 2359 } 2360 } 2361 2362 public int getPositionX() { 2363 return mPositionX; 2364 } 2365 2366 public int getPositionY() { 2367 return mPositionY; 2368 } 2369 2370 @Override 2371 public boolean onPreDraw() { 2372 updatePosition(); 2373 2374 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2375 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2376 TextViewPositionListener positionListener = mPositionListeners[i]; 2377 if (positionListener != null) { 2378 positionListener.updatePosition(mPositionX, mPositionY, 2379 mPositionHasChanged, mScrollHasChanged); 2380 } 2381 } 2382 } 2383 2384 mScrollHasChanged = false; 2385 return true; 2386 } 2387 2388 private void updatePosition() { 2389 mTextView.getLocationInWindow(mTempCoords); 2390 2391 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2392 2393 mPositionX = mTempCoords[0]; 2394 mPositionY = mTempCoords[1]; 2395 } 2396 2397 public void onScrollChanged() { 2398 mScrollHasChanged = true; 2399 } 2400 } 2401 2402 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2403 protected PopupWindow mPopupWindow; 2404 protected ViewGroup mContentView; 2405 int mPositionX, mPositionY; 2406 2407 protected abstract void createPopupWindow(); 2408 protected abstract void initContentView(); 2409 protected abstract int getTextOffset(); 2410 protected abstract int getVerticalLocalPosition(int line); 2411 protected abstract int clipVertically(int positionY); 2412 2413 public PinnedPopupWindow() { 2414 createPopupWindow(); 2415 2416 mPopupWindow.setWindowLayoutType( 2417 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2418 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2419 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2420 2421 initContentView(); 2422 2423 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2424 ViewGroup.LayoutParams.WRAP_CONTENT); 2425 mContentView.setLayoutParams(wrapContent); 2426 2427 mPopupWindow.setContentView(mContentView); 2428 } 2429 2430 public void show() { 2431 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2432 2433 computeLocalPosition(); 2434 2435 final PositionListener positionListener = getPositionListener(); 2436 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2437 } 2438 2439 protected void measureContent() { 2440 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2441 mContentView.measure( 2442 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2443 View.MeasureSpec.AT_MOST), 2444 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2445 View.MeasureSpec.AT_MOST)); 2446 } 2447 2448 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2449 * positioned according to viewportToContentHorizontalOffset. 2450 * 2451 * This method assumes that mContentView has properly been measured from its content. */ 2452 private void computeLocalPosition() { 2453 measureContent(); 2454 final int width = mContentView.getMeasuredWidth(); 2455 final int offset = getTextOffset(); 2456 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2457 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2458 2459 final int line = mTextView.getLayout().getLineForOffset(offset); 2460 mPositionY = getVerticalLocalPosition(line); 2461 mPositionY += mTextView.viewportToContentVerticalOffset(); 2462 } 2463 2464 private void updatePosition(int parentPositionX, int parentPositionY) { 2465 int positionX = parentPositionX + mPositionX; 2466 int positionY = parentPositionY + mPositionY; 2467 2468 positionY = clipVertically(positionY); 2469 2470 // Horizontal clipping 2471 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2472 final int width = mContentView.getMeasuredWidth(); 2473 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2474 positionX = Math.max(0, positionX); 2475 2476 if (isShowing()) { 2477 mPopupWindow.update(positionX, positionY, -1, -1); 2478 } else { 2479 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2480 positionX, positionY); 2481 } 2482 } 2483 2484 public void hide() { 2485 mPopupWindow.dismiss(); 2486 getPositionListener().removeSubscriber(this); 2487 } 2488 2489 @Override 2490 public void updatePosition(int parentPositionX, int parentPositionY, 2491 boolean parentPositionChanged, boolean parentScrolled) { 2492 // Either parentPositionChanged or parentScrolled is true, check if still visible 2493 if (isShowing() && isOffsetVisible(getTextOffset())) { 2494 if (parentScrolled) computeLocalPosition(); 2495 updatePosition(parentPositionX, parentPositionY); 2496 } else { 2497 hide(); 2498 } 2499 } 2500 2501 public boolean isShowing() { 2502 return mPopupWindow.isShowing(); 2503 } 2504 } 2505 2506 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2507 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2508 private static final int ADD_TO_DICTIONARY = -1; 2509 private static final int DELETE_TEXT = -2; 2510 private SuggestionInfo[] mSuggestionInfos; 2511 private int mNumberOfSuggestions; 2512 private boolean mCursorWasVisibleBeforeSuggestions; 2513 private boolean mIsShowingUp = false; 2514 private SuggestionAdapter mSuggestionsAdapter; 2515 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2516 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2517 2518 private class CustomPopupWindow extends PopupWindow { 2519 public CustomPopupWindow(Context context, int defStyleAttr) { 2520 super(context, null, defStyleAttr); 2521 } 2522 2523 @Override 2524 public void dismiss() { 2525 super.dismiss(); 2526 2527 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2528 2529 // Safe cast since show() checks that mTextView.getText() is an Editable 2530 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2531 2532 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2533 if (hasInsertionController()) { 2534 getInsertionController().show(); 2535 } 2536 } 2537 } 2538 2539 public SuggestionsPopupWindow() { 2540 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2541 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2542 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2543 } 2544 2545 @Override 2546 protected void createPopupWindow() { 2547 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2548 com.android.internal.R.attr.textSuggestionsWindowStyle); 2549 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2550 mPopupWindow.setFocusable(true); 2551 mPopupWindow.setClippingEnabled(false); 2552 } 2553 2554 @Override 2555 protected void initContentView() { 2556 ListView listView = new ListView(mTextView.getContext()); 2557 mSuggestionsAdapter = new SuggestionAdapter(); 2558 listView.setAdapter(mSuggestionsAdapter); 2559 listView.setOnItemClickListener(this); 2560 mContentView = listView; 2561 2562 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2563 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2564 for (int i = 0; i < mSuggestionInfos.length; i++) { 2565 mSuggestionInfos[i] = new SuggestionInfo(); 2566 } 2567 } 2568 2569 public boolean isShowingUp() { 2570 return mIsShowingUp; 2571 } 2572 2573 public void onParentLostFocus() { 2574 mIsShowingUp = false; 2575 } 2576 2577 private class SuggestionInfo { 2578 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2579 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2580 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2581 SpannableStringBuilder text = new SpannableStringBuilder(); 2582 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2583 android.R.style.TextAppearance_SuggestionHighlight); 2584 } 2585 2586 private class SuggestionAdapter extends BaseAdapter { 2587 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2588 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2589 2590 @Override 2591 public int getCount() { 2592 return mNumberOfSuggestions; 2593 } 2594 2595 @Override 2596 public Object getItem(int position) { 2597 return mSuggestionInfos[position]; 2598 } 2599 2600 @Override 2601 public long getItemId(int position) { 2602 return position; 2603 } 2604 2605 @Override 2606 public View getView(int position, View convertView, ViewGroup parent) { 2607 TextView textView = (TextView) convertView; 2608 2609 if (textView == null) { 2610 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2611 parent, false); 2612 } 2613 2614 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2615 textView.setText(suggestionInfo.text); 2616 2617 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2618 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2619 textView.setBackgroundColor(Color.TRANSPARENT); 2620 } else { 2621 textView.setBackgroundColor(Color.WHITE); 2622 } 2623 2624 return textView; 2625 } 2626 } 2627 2628 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2629 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2630 final int flag1 = span1.getFlags(); 2631 final int flag2 = span2.getFlags(); 2632 if (flag1 != flag2) { 2633 // The order here should match what is used in updateDrawState 2634 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2635 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2636 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2637 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2638 if (easy1 && !misspelled1) return -1; 2639 if (easy2 && !misspelled2) return 1; 2640 if (misspelled1) return -1; 2641 if (misspelled2) return 1; 2642 } 2643 2644 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2645 } 2646 } 2647 2648 /** 2649 * Returns the suggestion spans that cover the current cursor position. The suggestion 2650 * spans are sorted according to the length of text that they are attached to. 2651 */ 2652 private SuggestionSpan[] getSuggestionSpans() { 2653 int pos = mTextView.getSelectionStart(); 2654 Spannable spannable = (Spannable) mTextView.getText(); 2655 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2656 2657 mSpansLengths.clear(); 2658 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2659 int start = spannable.getSpanStart(suggestionSpan); 2660 int end = spannable.getSpanEnd(suggestionSpan); 2661 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2662 } 2663 2664 // The suggestions are sorted according to their types (easy correction first, then 2665 // misspelled) and to the length of the text that they cover (shorter first). 2666 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2667 return suggestionSpans; 2668 } 2669 2670 @Override 2671 public void show() { 2672 if (!(mTextView.getText() instanceof Editable)) return; 2673 2674 if (updateSuggestions()) { 2675 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2676 mTextView.setCursorVisible(false); 2677 mIsShowingUp = true; 2678 super.show(); 2679 } 2680 } 2681 2682 @Override 2683 protected void measureContent() { 2684 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2685 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2686 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2687 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2688 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2689 2690 int width = 0; 2691 View view = null; 2692 for (int i = 0; i < mNumberOfSuggestions; i++) { 2693 view = mSuggestionsAdapter.getView(i, view, mContentView); 2694 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2695 view.measure(horizontalMeasure, verticalMeasure); 2696 width = Math.max(width, view.getMeasuredWidth()); 2697 } 2698 2699 // Enforce the width based on actual text widths 2700 mContentView.measure( 2701 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2702 verticalMeasure); 2703 2704 Drawable popupBackground = mPopupWindow.getBackground(); 2705 if (popupBackground != null) { 2706 if (mTempRect == null) mTempRect = new Rect(); 2707 popupBackground.getPadding(mTempRect); 2708 width += mTempRect.left + mTempRect.right; 2709 } 2710 mPopupWindow.setWidth(width); 2711 } 2712 2713 @Override 2714 protected int getTextOffset() { 2715 return mTextView.getSelectionStart(); 2716 } 2717 2718 @Override 2719 protected int getVerticalLocalPosition(int line) { 2720 return mTextView.getLayout().getLineBottom(line); 2721 } 2722 2723 @Override 2724 protected int clipVertically(int positionY) { 2725 final int height = mContentView.getMeasuredHeight(); 2726 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2727 return Math.min(positionY, displayMetrics.heightPixels - height); 2728 } 2729 2730 @Override 2731 public void hide() { 2732 super.hide(); 2733 } 2734 2735 private boolean updateSuggestions() { 2736 Spannable spannable = (Spannable) mTextView.getText(); 2737 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2738 2739 final int nbSpans = suggestionSpans.length; 2740 // Suggestions are shown after a delay: the underlying spans may have been removed 2741 if (nbSpans == 0) return false; 2742 2743 mNumberOfSuggestions = 0; 2744 int spanUnionStart = mTextView.getText().length(); 2745 int spanUnionEnd = 0; 2746 2747 SuggestionSpan misspelledSpan = null; 2748 int underlineColor = 0; 2749 2750 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2751 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2752 final int spanStart = spannable.getSpanStart(suggestionSpan); 2753 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2754 spanUnionStart = Math.min(spanStart, spanUnionStart); 2755 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2756 2757 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2758 misspelledSpan = suggestionSpan; 2759 } 2760 2761 // The first span dictates the background color of the highlighted text 2762 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2763 2764 String[] suggestions = suggestionSpan.getSuggestions(); 2765 int nbSuggestions = suggestions.length; 2766 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2767 String suggestion = suggestions[suggestionIndex]; 2768 2769 boolean suggestionIsDuplicate = false; 2770 for (int i = 0; i < mNumberOfSuggestions; i++) { 2771 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2772 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2773 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2774 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2775 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2776 suggestionIsDuplicate = true; 2777 break; 2778 } 2779 } 2780 } 2781 2782 if (!suggestionIsDuplicate) { 2783 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2784 suggestionInfo.suggestionSpan = suggestionSpan; 2785 suggestionInfo.suggestionIndex = suggestionIndex; 2786 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2787 2788 mNumberOfSuggestions++; 2789 2790 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2791 // Also end outer for loop 2792 spanIndex = nbSpans; 2793 break; 2794 } 2795 } 2796 } 2797 } 2798 2799 for (int i = 0; i < mNumberOfSuggestions; i++) { 2800 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2801 } 2802 2803 // Add "Add to dictionary" item if there is a span with the misspelled flag 2804 if (misspelledSpan != null) { 2805 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2806 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2807 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2808 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2809 suggestionInfo.suggestionSpan = misspelledSpan; 2810 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2811 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2812 getContext().getString(com.android.internal.R.string.addToDictionary)); 2813 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2814 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2815 2816 mNumberOfSuggestions++; 2817 } 2818 } 2819 2820 // Delete item 2821 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2822 suggestionInfo.suggestionSpan = null; 2823 suggestionInfo.suggestionIndex = DELETE_TEXT; 2824 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2825 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2826 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2827 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2828 mNumberOfSuggestions++; 2829 2830 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2831 if (underlineColor == 0) { 2832 // Fallback on the default highlight color when the first span does not provide one 2833 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2834 } else { 2835 final float BACKGROUND_TRANSPARENCY = 0.4f; 2836 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2837 mSuggestionRangeSpan.setBackgroundColor( 2838 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2839 } 2840 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2841 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2842 2843 mSuggestionsAdapter.notifyDataSetChanged(); 2844 return true; 2845 } 2846 2847 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2848 int unionEnd) { 2849 final Spannable text = (Spannable) mTextView.getText(); 2850 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2851 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2852 2853 // Adjust the start/end of the suggestion span 2854 suggestionInfo.suggestionStart = spanStart - unionStart; 2855 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2856 + suggestionInfo.text.length(); 2857 2858 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2859 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2860 2861 // Add the text before and after the span. 2862 final String textAsString = text.toString(); 2863 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2864 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2865 } 2866 2867 @Override 2868 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2869 Editable editable = (Editable) mTextView.getText(); 2870 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2871 2872 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2873 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2874 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2875 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2876 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2877 if (spanUnionEnd < editable.length() && 2878 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2879 (spanUnionStart == 0 || 2880 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2881 spanUnionEnd = spanUnionEnd + 1; 2882 } 2883 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2884 } 2885 hide(); 2886 return; 2887 } 2888 2889 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2890 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2891 if (spanStart < 0 || spanEnd <= spanStart) { 2892 // Span has been removed 2893 hide(); 2894 return; 2895 } 2896 2897 final String originalText = editable.toString().substring(spanStart, spanEnd); 2898 2899 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2900 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2901 intent.putExtra("word", originalText); 2902 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2903 // Put a listener to replace the original text with a word which the user 2904 // modified in a user dictionary dialog. 2905 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2906 mTextView.getContext().startActivity(intent); 2907 // There is no way to know if the word was indeed added. Re-check. 2908 // TODO The ExtractEditText should remove the span in the original text instead 2909 editable.removeSpan(suggestionInfo.suggestionSpan); 2910 Selection.setSelection(editable, spanEnd); 2911 updateSpellCheckSpans(spanStart, spanEnd, false); 2912 } else { 2913 // SuggestionSpans are removed by replace: save them before 2914 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2915 SuggestionSpan.class); 2916 final int length = suggestionSpans.length; 2917 int[] suggestionSpansStarts = new int[length]; 2918 int[] suggestionSpansEnds = new int[length]; 2919 int[] suggestionSpansFlags = new int[length]; 2920 for (int i = 0; i < length; i++) { 2921 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2922 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2923 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2924 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2925 2926 // Remove potential misspelled flags 2927 int suggestionSpanFlags = suggestionSpan.getFlags(); 2928 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2929 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2930 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2931 suggestionSpan.setFlags(suggestionSpanFlags); 2932 } 2933 } 2934 2935 final int suggestionStart = suggestionInfo.suggestionStart; 2936 final int suggestionEnd = suggestionInfo.suggestionEnd; 2937 final String suggestion = suggestionInfo.text.subSequence( 2938 suggestionStart, suggestionEnd).toString(); 2939 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2940 2941 // Notify source IME of the suggestion pick. Do this before 2942 // swaping texts. 2943 suggestionInfo.suggestionSpan.notifySelection( 2944 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 2945 2946 // Swap text content between actual text and Suggestion span 2947 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 2948 suggestions[suggestionInfo.suggestionIndex] = originalText; 2949 2950 // Restore previous SuggestionSpans 2951 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 2952 for (int i = 0; i < length; i++) { 2953 // Only spans that include the modified region make sense after replacement 2954 // Spans partially included in the replaced region are removed, there is no 2955 // way to assign them a valid range after replacement 2956 if (suggestionSpansStarts[i] <= spanStart && 2957 suggestionSpansEnds[i] >= spanEnd) { 2958 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2959 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 2960 } 2961 } 2962 2963 // Move cursor at the end of the replaced word 2964 final int newCursorPosition = spanEnd + lengthDifference; 2965 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2966 } 2967 2968 hide(); 2969 } 2970 } 2971 2972 /** 2973 * An ActionMode Callback class that is used to provide actions while in text selection mode. 2974 * 2975 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 2976 * on which of these this TextView supports. 2977 */ 2978 private class SelectionActionModeCallback extends ActionMode.Callback2 { 2979 private final Path mSelectionPath = new Path(); 2980 private final RectF mSelectionBounds = new RectF(); 2981 2982 private int mSelectionHandleHeight; 2983 private int mInsertionHandleHeight; 2984 2985 public SelectionActionModeCallback() { 2986 SelectionModifierCursorController selectionController = getSelectionController(); 2987 if (selectionController.mStartHandle == null) { 2988 // As these are for initializing selectionController, hide() must be called. 2989 selectionController.initDrawables(); 2990 selectionController.initHandles(); 2991 selectionController.hide(); 2992 } 2993 mSelectionHandleHeight = Math.max( 2994 mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight()); 2995 InsertionPointCursorController insertionController = getInsertionController(); 2996 if (insertionController != null) { 2997 insertionController.getHandle(); 2998 mInsertionHandleHeight = mSelectHandleCenter.getMinimumHeight(); 2999 } 3000 } 3001 3002 @Override 3003 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3004 mode.setTitle(mTextView.getContext().getString( 3005 com.android.internal.R.string.textSelectionCABTitle)); 3006 mode.setSubtitle(null); 3007 mode.setTitleOptionalHint(true); 3008 populateMenuWithItems(menu); 3009 3010 if (mCustomSelectionActionModeCallback != null) { 3011 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 3012 // The custom mode can choose to cancel the action mode 3013 return false; 3014 } 3015 } 3016 3017 addIntentMenuItemsForTextProcessing(menu); 3018 3019 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3020 mTextView.setHasTransientState(true); 3021 return true; 3022 } else { 3023 return false; 3024 } 3025 } 3026 3027 private void populateMenuWithItems(Menu menu) { 3028 if (mTextView.canCut()) { 3029 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 3030 setAlphabeticShortcut('x'). 3031 setShowAsAction( 3032 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3033 } 3034 3035 if (mTextView.canCopy()) { 3036 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 3037 setAlphabeticShortcut('c'). 3038 setShowAsAction( 3039 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3040 } 3041 3042 if (mTextView.canPaste()) { 3043 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 3044 setAlphabeticShortcut('v'). 3045 setShowAsAction( 3046 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3047 } 3048 3049 if (mTextView.canShare()) { 3050 menu.add(0, TextView.ID_SHARE, 0, com.android.internal.R.string.share). 3051 setShowAsAction( 3052 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3053 } 3054 3055 if (mTextView.canSelectAllText()) { 3056 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 3057 setAlphabeticShortcut('a'). 3058 setShowAsAction( 3059 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3060 } 3061 3062 updateReplaceItem(menu); 3063 } 3064 3065 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3066 if (mTextView.canProcessText()) { 3067 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3068 List<ResolveInfo> supportedActivities = 3069 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3070 for (ResolveInfo info : supportedActivities) { 3071 menu.add(info.loadLabel(packageManager)) 3072 .setIntent(createProcessTextIntentForResolveInfo(info)) 3073 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM 3074 | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3075 } 3076 } 3077 } 3078 3079 private Intent createProcessTextIntent() { 3080 return new Intent() 3081 .setAction(Intent.ACTION_PROCESS_TEXT) 3082 .setType("text/plain"); 3083 } 3084 3085 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3086 return createProcessTextIntent() 3087 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3088 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3089 } 3090 3091 @Override 3092 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3093 updateReplaceItem(menu); 3094 3095 if (mCustomSelectionActionModeCallback != null) { 3096 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3097 } 3098 return true; 3099 } 3100 3101 private void updateReplaceItem(Menu menu) { 3102 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3103 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3104 if (canReplace && !replaceItemExists) { 3105 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 3106 setShowAsAction( 3107 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3108 } else if (!canReplace && replaceItemExists) { 3109 menu.removeItem(TextView.ID_REPLACE); 3110 } 3111 } 3112 3113 @Override 3114 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3115 if (item.getIntent() != null 3116 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3117 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3118 mPreserveDetachedSelection = true; 3119 mTextView.startActivityForResult( 3120 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3121 return true; 3122 } 3123 if (mCustomSelectionActionModeCallback != null && 3124 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3125 return true; 3126 } 3127 return mTextView.onTextContextMenuItem(item.getItemId()); 3128 } 3129 3130 @Override 3131 public void onDestroyActionMode(ActionMode mode) { 3132 if (mCustomSelectionActionModeCallback != null) { 3133 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3134 } 3135 3136 /* 3137 * If we're ending this mode because we're detaching from a window, 3138 * we still have selection state to preserve. Don't clear it, we'll 3139 * bring back the selection mode when (if) we get reattached. 3140 */ 3141 if (!mPreserveDetachedSelection) { 3142 Selection.setSelection((Spannable) mTextView.getText(), 3143 mTextView.getSelectionEnd()); 3144 mTextView.setHasTransientState(false); 3145 } 3146 3147 if (mSelectionModifierCursorController != null) { 3148 mSelectionModifierCursorController.hide(); 3149 } 3150 3151 mSelectionActionMode = null; 3152 } 3153 3154 @Override 3155 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3156 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3157 super.onGetContentRect(mode, view, outRect); 3158 return; 3159 } 3160 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3161 // We have a selection. 3162 mSelectionPath.reset(); 3163 mTextView.getLayout().getSelectionPath( 3164 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3165 mSelectionPath.computeBounds(mSelectionBounds, true); 3166 mSelectionBounds.bottom += mSelectionHandleHeight; 3167 } else if (mCursorCount == 2) { 3168 // We have a split cursor. In this case, we take the rectangle that includes both 3169 // parts of the cursor to ensure we don't obscure either of them. 3170 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3171 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3172 mSelectionBounds.set( 3173 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3174 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3175 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3176 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3177 + mInsertionHandleHeight); 3178 } else { 3179 // We have a single cursor. 3180 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3181 float primaryHorizontal = 3182 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3183 mSelectionBounds.set( 3184 primaryHorizontal, 3185 mTextView.getLayout().getLineTop(line), 3186 primaryHorizontal + 1, 3187 mTextView.getLayout().getLineTop(line + 1) + mInsertionHandleHeight); 3188 } 3189 // Take TextView's padding and scroll into account. 3190 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3191 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3192 outRect.set( 3193 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3194 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3195 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3196 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3197 } 3198 } 3199 3200 /** 3201 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3202 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3203 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3204 */ 3205 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3206 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3207 final int[] mTmpIntOffset = new int[2]; 3208 final Matrix mViewToScreenMatrix = new Matrix(); 3209 3210 @Override 3211 public void updatePosition(int parentPositionX, int parentPositionY, 3212 boolean parentPositionChanged, boolean parentScrolled) { 3213 final InputMethodState ims = mInputMethodState; 3214 if (ims == null || ims.mBatchEditNesting > 0) { 3215 return; 3216 } 3217 final InputMethodManager imm = InputMethodManager.peekInstance(); 3218 if (null == imm) { 3219 return; 3220 } 3221 if (!imm.isActive(mTextView)) { 3222 return; 3223 } 3224 // Skip if the IME has not requested the cursor/anchor position. 3225 if (!imm.isCursorAnchorInfoEnabled()) { 3226 return; 3227 } 3228 Layout layout = mTextView.getLayout(); 3229 if (layout == null) { 3230 return; 3231 } 3232 3233 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3234 builder.reset(); 3235 3236 final int selectionStart = mTextView.getSelectionStart(); 3237 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3238 3239 // Construct transformation matrix from view local coordinates to screen coordinates. 3240 mViewToScreenMatrix.set(mTextView.getMatrix()); 3241 mTextView.getLocationOnScreen(mTmpIntOffset); 3242 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3243 builder.setMatrix(mViewToScreenMatrix); 3244 3245 final float viewportToContentHorizontalOffset = 3246 mTextView.viewportToContentHorizontalOffset(); 3247 final float viewportToContentVerticalOffset = 3248 mTextView.viewportToContentVerticalOffset(); 3249 3250 final CharSequence text = mTextView.getText(); 3251 if (text instanceof Spannable) { 3252 final Spannable sp = (Spannable) text; 3253 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3254 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3255 if (composingTextEnd < composingTextStart) { 3256 final int temp = composingTextEnd; 3257 composingTextEnd = composingTextStart; 3258 composingTextStart = temp; 3259 } 3260 final boolean hasComposingText = 3261 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3262 if (hasComposingText) { 3263 final CharSequence composingText = text.subSequence(composingTextStart, 3264 composingTextEnd); 3265 builder.setComposingText(composingTextStart, composingText); 3266 3267 final int minLine = layout.getLineForOffset(composingTextStart); 3268 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3269 for (int line = minLine; line <= maxLine; ++line) { 3270 final int lineStart = layout.getLineStart(line); 3271 final int lineEnd = layout.getLineEnd(line); 3272 final int offsetStart = Math.max(lineStart, composingTextStart); 3273 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3274 final boolean ltrLine = 3275 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3276 final float[] widths = new float[offsetEnd - offsetStart]; 3277 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3278 final float top = layout.getLineTop(line); 3279 final float bottom = layout.getLineBottom(line); 3280 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3281 final float charWidth = widths[offset - offsetStart]; 3282 final boolean isRtl = layout.isRtlCharAt(offset); 3283 final float primary = layout.getPrimaryHorizontal(offset); 3284 final float secondary = layout.getSecondaryHorizontal(offset); 3285 // TODO: This doesn't work perfectly for text with custom styles and 3286 // TAB chars. 3287 final float left; 3288 final float right; 3289 if (ltrLine) { 3290 if (isRtl) { 3291 left = secondary - charWidth; 3292 right = secondary; 3293 } else { 3294 left = primary; 3295 right = primary + charWidth; 3296 } 3297 } else { 3298 if (!isRtl) { 3299 left = secondary; 3300 right = secondary + charWidth; 3301 } else { 3302 left = primary - charWidth; 3303 right = primary; 3304 } 3305 } 3306 // TODO: Check top-right and bottom-left as well. 3307 final float localLeft = left + viewportToContentHorizontalOffset; 3308 final float localRight = right + viewportToContentHorizontalOffset; 3309 final float localTop = top + viewportToContentVerticalOffset; 3310 final float localBottom = bottom + viewportToContentVerticalOffset; 3311 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3312 final boolean isBottomRightVisible = 3313 isPositionVisible(localRight, localBottom); 3314 int characterBoundsFlags = 0; 3315 if (isTopLeftVisible || isBottomRightVisible) { 3316 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3317 } 3318 if (!isTopLeftVisible || !isBottomRightVisible) { 3319 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3320 } 3321 if (isRtl) { 3322 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3323 } 3324 // Here offset is the index in Java chars. 3325 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3326 localBottom, characterBoundsFlags); 3327 } 3328 } 3329 } 3330 } 3331 3332 // Treat selectionStart as the insertion point. 3333 if (0 <= selectionStart) { 3334 final int offset = selectionStart; 3335 final int line = layout.getLineForOffset(offset); 3336 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3337 + viewportToContentHorizontalOffset; 3338 final float insertionMarkerTop = layout.getLineTop(line) 3339 + viewportToContentVerticalOffset; 3340 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3341 + viewportToContentVerticalOffset; 3342 final float insertionMarkerBottom = layout.getLineBottom(line) 3343 + viewportToContentVerticalOffset; 3344 final boolean isTopVisible = 3345 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3346 final boolean isBottomVisible = 3347 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3348 int insertionMarkerFlags = 0; 3349 if (isTopVisible || isBottomVisible) { 3350 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3351 } 3352 if (!isTopVisible || !isBottomVisible) { 3353 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3354 } 3355 if (layout.isRtlCharAt(offset)) { 3356 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3357 } 3358 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3359 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3360 } 3361 3362 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3363 } 3364 } 3365 3366 private abstract class HandleView extends View implements TextViewPositionListener { 3367 protected Drawable mDrawable; 3368 protected Drawable mDrawableLtr; 3369 protected Drawable mDrawableRtl; 3370 private final PopupWindow mContainer; 3371 // Position with respect to the parent TextView 3372 private int mPositionX, mPositionY; 3373 private boolean mIsDragging; 3374 // Offset from touch position to mPosition 3375 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3376 protected int mHotspotX; 3377 protected int mHorizontalGravity; 3378 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3379 private float mTouchOffsetY; 3380 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3381 private float mIdealVerticalOffset; 3382 // Parent's (TextView) previous position in window 3383 private int mLastParentX, mLastParentY; 3384 // Previous text character offset 3385 protected int mPreviousOffset = -1; 3386 // Previous text character offset 3387 private boolean mPositionHasChanged = true; 3388 // Minimum touch target size for handles 3389 private int mMinSize; 3390 // Indicates the line of text that the handle is on. 3391 protected int mPrevLine = -1; 3392 3393 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3394 super(mTextView.getContext()); 3395 mContainer = new PopupWindow(mTextView.getContext(), null, 3396 com.android.internal.R.attr.textSelectHandleWindowStyle); 3397 mContainer.setSplitTouchEnabled(true); 3398 mContainer.setClippingEnabled(false); 3399 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3400 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3401 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3402 mContainer.setContentView(this); 3403 3404 mDrawableLtr = drawableLtr; 3405 mDrawableRtl = drawableRtl; 3406 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3407 com.android.internal.R.dimen.text_handle_min_size); 3408 3409 updateDrawable(); 3410 3411 final int handleHeight = getPreferredHeight(); 3412 mTouchOffsetY = -0.3f * handleHeight; 3413 mIdealVerticalOffset = 0.7f * handleHeight; 3414 } 3415 3416 protected void updateDrawable() { 3417 final int offset = getCurrentCursorOffset(); 3418 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3419 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3420 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3421 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3422 } 3423 3424 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3425 protected abstract int getHorizontalGravity(boolean isRtlRun); 3426 3427 // Touch-up filter: number of previous positions remembered 3428 private static final int HISTORY_SIZE = 5; 3429 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3430 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3431 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3432 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3433 private int mPreviousOffsetIndex = 0; 3434 private int mNumberPreviousOffsets = 0; 3435 3436 private void startTouchUpFilter(int offset) { 3437 mNumberPreviousOffsets = 0; 3438 addPositionToTouchUpFilter(offset); 3439 } 3440 3441 private void addPositionToTouchUpFilter(int offset) { 3442 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3443 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3444 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3445 mNumberPreviousOffsets++; 3446 } 3447 3448 private void filterOnTouchUp() { 3449 final long now = SystemClock.uptimeMillis(); 3450 int i = 0; 3451 int index = mPreviousOffsetIndex; 3452 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3453 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3454 i++; 3455 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3456 } 3457 3458 if (i > 0 && i < iMax && 3459 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3460 positionAtCursorOffset(mPreviousOffsets[index], false); 3461 } 3462 } 3463 3464 public boolean offsetHasBeenChanged() { 3465 return mNumberPreviousOffsets > 1; 3466 } 3467 3468 @Override 3469 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3470 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3471 } 3472 3473 private int getPreferredWidth() { 3474 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3475 } 3476 3477 private int getPreferredHeight() { 3478 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3479 } 3480 3481 public void show() { 3482 if (isShowing()) return; 3483 3484 getPositionListener().addSubscriber(this, true /* local position may change */); 3485 3486 // Make sure the offset is always considered new, even when focusing at same position 3487 mPreviousOffset = -1; 3488 positionAtCursorOffset(getCurrentCursorOffset(), false); 3489 } 3490 3491 protected void dismiss() { 3492 mIsDragging = false; 3493 mContainer.dismiss(); 3494 onDetached(); 3495 } 3496 3497 public void hide() { 3498 dismiss(); 3499 3500 getPositionListener().removeSubscriber(this); 3501 } 3502 3503 public boolean isShowing() { 3504 return mContainer.isShowing(); 3505 } 3506 3507 private boolean isVisible() { 3508 // Always show a dragging handle. 3509 if (mIsDragging) { 3510 return true; 3511 } 3512 3513 if (mTextView.isInBatchEditMode()) { 3514 return false; 3515 } 3516 3517 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3518 } 3519 3520 public abstract int getCurrentCursorOffset(); 3521 3522 protected abstract void updateSelection(int offset); 3523 3524 public abstract void updatePosition(float x, float y); 3525 3526 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3527 // A HandleView relies on the layout, which may be nulled by external methods 3528 Layout layout = mTextView.getLayout(); 3529 if (layout == null) { 3530 // Will update controllers' state, hiding them and stopping selection mode if needed 3531 prepareCursorControllers(); 3532 return; 3533 } 3534 3535 boolean offsetChanged = offset != mPreviousOffset; 3536 if (offsetChanged || parentScrolled) { 3537 if (offsetChanged) { 3538 updateSelection(offset); 3539 addPositionToTouchUpFilter(offset); 3540 } 3541 final int line = layout.getLineForOffset(offset); 3542 mPrevLine = line; 3543 3544 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3545 getHorizontalOffset() + getCursorOffset()); 3546 mPositionY = layout.getLineBottom(line); 3547 3548 // Take TextView's padding and scroll into account. 3549 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3550 mPositionY += mTextView.viewportToContentVerticalOffset(); 3551 3552 mPreviousOffset = offset; 3553 mPositionHasChanged = true; 3554 } 3555 } 3556 3557 public void updatePosition(int parentPositionX, int parentPositionY, 3558 boolean parentPositionChanged, boolean parentScrolled) { 3559 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3560 if (parentPositionChanged || mPositionHasChanged) { 3561 if (mIsDragging) { 3562 // Update touchToWindow offset in case of parent scrolling while dragging 3563 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3564 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3565 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3566 mLastParentX = parentPositionX; 3567 mLastParentY = parentPositionY; 3568 } 3569 3570 onHandleMoved(); 3571 } 3572 3573 if (isVisible()) { 3574 final int positionX = parentPositionX + mPositionX; 3575 final int positionY = parentPositionY + mPositionY; 3576 if (isShowing()) { 3577 mContainer.update(positionX, positionY, -1, -1); 3578 } else { 3579 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3580 positionX, positionY); 3581 } 3582 } else { 3583 if (isShowing()) { 3584 dismiss(); 3585 } 3586 } 3587 3588 mPositionHasChanged = false; 3589 } 3590 } 3591 3592 public void showAtLocation(int offset) { 3593 // TODO - investigate if there's a better way to show the handles 3594 // after the drag accelerator has occured. 3595 int[] tmpCords = new int[2]; 3596 mTextView.getLocationInWindow(tmpCords); 3597 3598 Layout layout = mTextView.getLayout(); 3599 int posX = tmpCords[0]; 3600 int posY = tmpCords[1]; 3601 3602 final int line = layout.getLineForOffset(offset); 3603 3604 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3605 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3606 int startY = layout.getLineBottom(line); 3607 3608 // Take TextView's padding and scroll into account. 3609 startX += mTextView.viewportToContentHorizontalOffset(); 3610 startY += mTextView.viewportToContentVerticalOffset(); 3611 3612 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3613 startX + posX, startY + posY); 3614 } 3615 3616 @Override 3617 protected void onDraw(Canvas c) { 3618 final int drawWidth = mDrawable.getIntrinsicWidth(); 3619 final int left = getHorizontalOffset(); 3620 3621 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3622 mDrawable.draw(c); 3623 } 3624 3625 private int getHorizontalOffset() { 3626 final int width = getPreferredWidth(); 3627 final int drawWidth = mDrawable.getIntrinsicWidth(); 3628 final int left; 3629 switch (mHorizontalGravity) { 3630 case Gravity.LEFT: 3631 left = 0; 3632 break; 3633 default: 3634 case Gravity.CENTER: 3635 left = (width - drawWidth) / 2; 3636 break; 3637 case Gravity.RIGHT: 3638 left = width - drawWidth; 3639 break; 3640 } 3641 return left; 3642 } 3643 3644 protected int getCursorOffset() { 3645 return 0; 3646 } 3647 3648 @Override 3649 public boolean onTouchEvent(MotionEvent ev) { 3650 switch (ev.getActionMasked()) { 3651 case MotionEvent.ACTION_DOWN: { 3652 startTouchUpFilter(getCurrentCursorOffset()); 3653 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3654 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3655 3656 final PositionListener positionListener = getPositionListener(); 3657 mLastParentX = positionListener.getPositionX(); 3658 mLastParentY = positionListener.getPositionY(); 3659 mIsDragging = true; 3660 break; 3661 } 3662 3663 case MotionEvent.ACTION_MOVE: { 3664 final float rawX = ev.getRawX(); 3665 final float rawY = ev.getRawY(); 3666 3667 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3668 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3669 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3670 float newVerticalOffset; 3671 if (previousVerticalOffset < mIdealVerticalOffset) { 3672 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3673 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3674 } else { 3675 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3676 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3677 } 3678 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3679 3680 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3681 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3682 3683 updatePosition(newPosX, newPosY); 3684 break; 3685 } 3686 3687 case MotionEvent.ACTION_UP: 3688 filterOnTouchUp(); 3689 mIsDragging = false; 3690 break; 3691 3692 case MotionEvent.ACTION_CANCEL: 3693 mIsDragging = false; 3694 break; 3695 } 3696 return true; 3697 } 3698 3699 public boolean isDragging() { 3700 return mIsDragging; 3701 } 3702 3703 void onHandleMoved() {} 3704 3705 public void onDetached() {} 3706 } 3707 3708 private class InsertionHandleView extends HandleView { 3709 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3710 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3711 3712 // Used to detect taps on the insertion handle, which will affect the selection action mode 3713 private float mDownPositionX, mDownPositionY; 3714 private Runnable mHider; 3715 3716 public InsertionHandleView(Drawable drawable) { 3717 super(drawable, drawable); 3718 } 3719 3720 @Override 3721 public void show() { 3722 super.show(); 3723 3724 final long durationSinceCutOrCopy = 3725 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3726 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3727 startSelectionActionModeWithoutSelection(); 3728 } 3729 3730 hideAfterDelay(); 3731 } 3732 3733 private void hideAfterDelay() { 3734 if (mHider == null) { 3735 mHider = new Runnable() { 3736 public void run() { 3737 hide(); 3738 } 3739 }; 3740 } else { 3741 removeHiderCallback(); 3742 } 3743 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3744 } 3745 3746 private void removeHiderCallback() { 3747 if (mHider != null) { 3748 mTextView.removeCallbacks(mHider); 3749 } 3750 } 3751 3752 @Override 3753 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3754 return drawable.getIntrinsicWidth() / 2; 3755 } 3756 3757 @Override 3758 protected int getHorizontalGravity(boolean isRtlRun) { 3759 return Gravity.CENTER_HORIZONTAL; 3760 } 3761 3762 @Override 3763 protected int getCursorOffset() { 3764 int offset = super.getCursorOffset(); 3765 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3766 if (cursor != null) { 3767 cursor.getPadding(mTempRect); 3768 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3769 } 3770 return offset; 3771 } 3772 3773 @Override 3774 public boolean onTouchEvent(MotionEvent ev) { 3775 final boolean result = super.onTouchEvent(ev); 3776 3777 switch (ev.getActionMasked()) { 3778 case MotionEvent.ACTION_DOWN: 3779 mDownPositionX = ev.getRawX(); 3780 mDownPositionY = ev.getRawY(); 3781 break; 3782 3783 case MotionEvent.ACTION_UP: 3784 if (!offsetHasBeenChanged()) { 3785 final float deltaX = mDownPositionX - ev.getRawX(); 3786 final float deltaY = mDownPositionY - ev.getRawY(); 3787 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3788 3789 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3790 mTextView.getContext()); 3791 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3792 3793 if (distanceSquared < touchSlop * touchSlop) { 3794 // Tapping on the handle toggles the selection action mode. 3795 if (mSelectionActionMode != null) { 3796 mSelectionActionMode.finish(); 3797 } else { 3798 startSelectionActionModeWithoutSelection(); 3799 } 3800 } 3801 } else { 3802 if (mSelectionActionMode != null) { 3803 mSelectionActionMode.invalidateContentRect(); 3804 } 3805 } 3806 hideAfterDelay(); 3807 break; 3808 3809 case MotionEvent.ACTION_CANCEL: 3810 hideAfterDelay(); 3811 break; 3812 3813 default: 3814 break; 3815 } 3816 3817 return result; 3818 } 3819 3820 @Override 3821 public int getCurrentCursorOffset() { 3822 return mTextView.getSelectionStart(); 3823 } 3824 3825 @Override 3826 public void updateSelection(int offset) { 3827 Selection.setSelection((Spannable) mTextView.getText(), offset); 3828 } 3829 3830 @Override 3831 public void updatePosition(float x, float y) { 3832 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3833 if (mSelectionActionMode != null) { 3834 mSelectionActionMode.invalidate(); 3835 } 3836 } 3837 3838 @Override 3839 void onHandleMoved() { 3840 super.onHandleMoved(); 3841 removeHiderCallback(); 3842 } 3843 3844 @Override 3845 public void onDetached() { 3846 super.onDetached(); 3847 removeHiderCallback(); 3848 } 3849 } 3850 3851 private class SelectionStartHandleView extends HandleView { 3852 // Indicates whether the cursor is making adjustments within a word. 3853 private boolean mInWord = false; 3854 // Difference between touch position and word boundary position. 3855 private float mTouchWordDelta; 3856 3857 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3858 super(drawableLtr, drawableRtl); 3859 } 3860 3861 @Override 3862 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3863 return isRtlRun ? 0 : drawable.getIntrinsicWidth(); 3864 } 3865 3866 @Override 3867 protected int getHorizontalGravity(boolean isRtlRun) { 3868 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 3869 } 3870 3871 @Override 3872 public int getCurrentCursorOffset() { 3873 return mTextView.getSelectionStart(); 3874 } 3875 3876 @Override 3877 public void updateSelection(int offset) { 3878 Selection.setSelection((Spannable) mTextView.getText(), offset, 3879 mTextView.getSelectionEnd()); 3880 updateDrawable(); 3881 if (mSelectionActionMode != null) { 3882 mSelectionActionMode.invalidate(); 3883 } 3884 } 3885 3886 @Override 3887 public void updatePosition(float x, float y) { 3888 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3889 final int currLine = mTextView.getLineAtCoordinate(y); 3890 boolean positionCursor = false; 3891 int offset = trueOffset; 3892 int end = getWordEnd(offset); 3893 int start = getWordStart(offset); 3894 3895 if (offset < mPreviousOffset) { 3896 // User is increasing the selection. 3897 if (!mInWord || currLine < mPrevLine) { 3898 // We're not in a word, or we're on a different line so we'll expand by 3899 // word. First ensure the user has at least entered the next word. 3900 int offsetToWord = Math.min((end - start) / 2, 2); 3901 if (offset <= end - offsetToWord || currLine < mPrevLine) { 3902 offset = start; 3903 } else { 3904 offset = mPreviousOffset; 3905 } 3906 } 3907 final Layout layout = mTextView.getLayout(); 3908 if (layout != null && offset < trueOffset) { 3909 final float adjustedX = layout.getPrimaryHorizontal(offset); 3910 mTouchWordDelta = 3911 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 3912 } else { 3913 mTouchWordDelta = 0.0f; 3914 } 3915 positionCursor = true; 3916 } else { 3917 final int adjustedOffset = 3918 mTextView.getOffsetAtCoordinate(currLine, x - mTouchWordDelta); 3919 if (adjustedOffset > mPreviousOffset || currLine > mPrevLine) { 3920 // User is shrinking the selection. 3921 if (currLine > mPrevLine) { 3922 // We're on a different line, so we'll snap to word boundaries. 3923 offset = start; 3924 final Layout layout = mTextView.getLayout(); 3925 if (layout != null && offset < trueOffset) { 3926 final float adjustedX = layout.getPrimaryHorizontal(offset); 3927 mTouchWordDelta = 3928 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 3929 } else { 3930 mTouchWordDelta = 0.0f; 3931 } 3932 } else { 3933 offset = adjustedOffset; 3934 } 3935 positionCursor = true; 3936 } 3937 } 3938 3939 // Handles can not cross and selection is at least one character. 3940 if (positionCursor) { 3941 final int selectionEnd = mTextView.getSelectionEnd(); 3942 if (offset >= selectionEnd) { 3943 // We can't cross the handles so let's just constrain the Y value. 3944 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 3945 if (alteredOffset >= selectionEnd) { 3946 // Can't pass the other drag handle. 3947 offset = getNextCursorOffset(selectionEnd, false); 3948 } else { 3949 offset = alteredOffset; 3950 } 3951 mTouchWordDelta = 0.0f; 3952 } 3953 mInWord = !getWordIteratorWithText().isBoundary(offset); 3954 positionAtCursorOffset(offset, false); 3955 } 3956 } 3957 3958 @Override 3959 public boolean onTouchEvent(MotionEvent event) { 3960 boolean superResult = super.onTouchEvent(event); 3961 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 3962 // Reset the touch word offset when the user has lifted their finger. 3963 mTouchWordDelta = 0.0f; 3964 } 3965 return superResult; 3966 } 3967 } 3968 3969 private class SelectionEndHandleView extends HandleView { 3970 // Indicates whether the cursor is making adjustments within a word. 3971 private boolean mInWord = false; 3972 // Difference between touch position and word boundary position. 3973 private float mTouchWordDelta; 3974 3975 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3976 super(drawableLtr, drawableRtl); 3977 } 3978 3979 @Override 3980 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3981 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 3982 } 3983 3984 @Override 3985 protected int getHorizontalGravity(boolean isRtlRun) { 3986 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 3987 } 3988 3989 @Override 3990 public int getCurrentCursorOffset() { 3991 return mTextView.getSelectionEnd(); 3992 } 3993 3994 @Override 3995 public void updateSelection(int offset) { 3996 Selection.setSelection((Spannable) mTextView.getText(), 3997 mTextView.getSelectionStart(), offset); 3998 if (mSelectionActionMode != null) { 3999 mSelectionActionMode.invalidate(); 4000 } 4001 updateDrawable(); 4002 } 4003 4004 @Override 4005 public void updatePosition(float x, float y) { 4006 final int trueOffset = mTextView.getOffsetForPosition(x, y); 4007 final int currLine = mTextView.getLineAtCoordinate(y); 4008 int offset = trueOffset; 4009 boolean positionCursor = false; 4010 int end = getWordEnd(offset); 4011 int start = getWordStart(offset); 4012 4013 if (offset > mPreviousOffset) { 4014 // User is increasing the selection. 4015 if (!mInWord || currLine > mPrevLine) { 4016 // We're not in a word, or we're on a different line so we'll expand by 4017 // word. First ensure the user has at least entered the next word. 4018 int midPoint = Math.min((end - start) / 2, 2); 4019 if (offset >= start + midPoint || currLine > mPrevLine) { 4020 offset = end; 4021 } else { 4022 offset = mPreviousOffset; 4023 } 4024 } 4025 final Layout layout = mTextView.getLayout(); 4026 if (layout != null && offset > trueOffset) { 4027 final float adjustedX = layout.getPrimaryHorizontal(offset); 4028 mTouchWordDelta = 4029 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4030 } else { 4031 mTouchWordDelta = 0.0f; 4032 } 4033 positionCursor = true; 4034 } else { 4035 final int adjustedOffset = 4036 mTextView.getOffsetAtCoordinate(currLine, x + mTouchWordDelta); 4037 if (adjustedOffset < mPreviousOffset || currLine < mPrevLine) { 4038 // User is shrinking the selection. 4039 if (currLine < mPrevLine) { 4040 // We're on a different line, so we'll snap to word boundaries. 4041 offset = end; 4042 final Layout layout = mTextView.getLayout(); 4043 if (layout != null && offset > trueOffset) { 4044 final float adjustedX = layout.getPrimaryHorizontal(offset); 4045 mTouchWordDelta = 4046 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4047 } else { 4048 mTouchWordDelta = 0.0f; 4049 } 4050 } else { 4051 offset = adjustedOffset; 4052 } 4053 positionCursor = true; 4054 } 4055 } 4056 4057 if (positionCursor) { 4058 final int selectionStart = mTextView.getSelectionStart(); 4059 if (offset <= selectionStart) { 4060 // We can't cross the handles so let's just constrain the Y value. 4061 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 4062 int length = mTextView.getText().length(); 4063 if (alteredOffset <= selectionStart) { 4064 // Can't pass the other drag handle. 4065 offset = getNextCursorOffset(selectionStart, true); 4066 } else { 4067 offset = Math.min(alteredOffset, length); 4068 } 4069 mTouchWordDelta = 0.0f; 4070 } 4071 mInWord = !getWordIteratorWithText().isBoundary(offset); 4072 positionAtCursorOffset(offset, false); 4073 } 4074 } 4075 4076 @Override 4077 public boolean onTouchEvent(MotionEvent event) { 4078 boolean superResult = super.onTouchEvent(event); 4079 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4080 // Reset the touch word offset when the user has lifted their finger. 4081 mTouchWordDelta = 0.0f; 4082 } 4083 return superResult; 4084 } 4085 } 4086 4087 /** 4088 * A CursorController instance can be used to control a cursor in the text. 4089 */ 4090 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4091 /** 4092 * Makes the cursor controller visible on screen. 4093 * See also {@link #hide()}. 4094 */ 4095 public void show(); 4096 4097 /** 4098 * Hide the cursor controller from screen. 4099 * See also {@link #show()}. 4100 */ 4101 public void hide(); 4102 4103 /** 4104 * Called when the view is detached from window. Perform house keeping task, such as 4105 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4106 * preventing the activity from being recycled. 4107 */ 4108 public void onDetached(); 4109 } 4110 4111 private class InsertionPointCursorController implements CursorController { 4112 private InsertionHandleView mHandle; 4113 4114 public void show() { 4115 getHandle().show(); 4116 } 4117 4118 public void hide() { 4119 if (mHandle != null) { 4120 mHandle.hide(); 4121 } 4122 } 4123 4124 public void onTouchModeChanged(boolean isInTouchMode) { 4125 if (!isInTouchMode) { 4126 hide(); 4127 } 4128 } 4129 4130 private InsertionHandleView getHandle() { 4131 if (mSelectHandleCenter == null) { 4132 mSelectHandleCenter = mTextView.getContext().getDrawable( 4133 mTextView.mTextSelectHandleRes); 4134 } 4135 if (mHandle == null) { 4136 mHandle = new InsertionHandleView(mSelectHandleCenter); 4137 } 4138 return mHandle; 4139 } 4140 4141 @Override 4142 public void onDetached() { 4143 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4144 observer.removeOnTouchModeChangeListener(this); 4145 4146 if (mHandle != null) mHandle.onDetached(); 4147 } 4148 } 4149 4150 class SelectionModifierCursorController implements CursorController { 4151 // The cursor controller handles, lazily created when shown. 4152 private SelectionStartHandleView mStartHandle; 4153 private SelectionEndHandleView mEndHandle; 4154 // The offsets of that last touch down event. Remembered to start selection there. 4155 private int mMinTouchOffset, mMaxTouchOffset; 4156 4157 // Double tap detection 4158 private long mPreviousTapUpTime = 0; 4159 private float mDownPositionX, mDownPositionY; 4160 private boolean mGestureStayedInTapRegion; 4161 4162 // Where the user first starts the drag motion. 4163 private int mStartOffset = -1; 4164 // Indicates whether the user is selecting text and using the drag accelerator. 4165 private boolean mDragAcceleratorActive; 4166 4167 SelectionModifierCursorController() { 4168 resetTouchOffsets(); 4169 } 4170 4171 public void show() { 4172 if (mTextView.isInBatchEditMode()) { 4173 return; 4174 } 4175 initDrawables(); 4176 initHandles(); 4177 hideInsertionPointCursorController(); 4178 } 4179 4180 private void initDrawables() { 4181 if (mSelectHandleLeft == null) { 4182 mSelectHandleLeft = mTextView.getContext().getDrawable( 4183 mTextView.mTextSelectHandleLeftRes); 4184 } 4185 if (mSelectHandleRight == null) { 4186 mSelectHandleRight = mTextView.getContext().getDrawable( 4187 mTextView.mTextSelectHandleRightRes); 4188 } 4189 } 4190 4191 private void initHandles() { 4192 // Lazy object creation has to be done before updatePosition() is called. 4193 if (mStartHandle == null) { 4194 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4195 } 4196 if (mEndHandle == null) { 4197 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4198 } 4199 4200 mStartHandle.show(); 4201 mEndHandle.show(); 4202 4203 hideInsertionPointCursorController(); 4204 } 4205 4206 public void hide() { 4207 if (mStartHandle != null) mStartHandle.hide(); 4208 if (mEndHandle != null) mEndHandle.hide(); 4209 } 4210 4211 public void enterDrag() { 4212 // Just need to init the handles / hide insertion cursor. 4213 show(); 4214 mDragAcceleratorActive = true; 4215 // Start location of selection. 4216 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4217 mLastDownPositionY); 4218 // Don't show the handles until user has lifted finger. 4219 hide(); 4220 4221 // This stops scrolling parents from intercepting the touch event, allowing 4222 // the user to continue dragging across the screen to select text; TextView will 4223 // scroll as necessary. 4224 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4225 } 4226 4227 public void onTouchEvent(MotionEvent event) { 4228 // This is done even when the View does not have focus, so that long presses can start 4229 // selection and tap can move cursor from this tap position. 4230 switch (event.getActionMasked()) { 4231 case MotionEvent.ACTION_DOWN: 4232 final float x = event.getX(); 4233 final float y = event.getY(); 4234 4235 // Remember finger down position, to be able to start selection from there. 4236 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4237 4238 // Double tap detection 4239 if (mGestureStayedInTapRegion) { 4240 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 4241 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 4242 final float deltaX = x - mDownPositionX; 4243 final float deltaY = y - mDownPositionY; 4244 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4245 4246 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4247 mTextView.getContext()); 4248 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4249 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4250 4251 if (stayedInArea && isPositionOnText(x, y)) { 4252 startSelectionActionModeWithSelectionAndStartDrag(); 4253 mDiscardNextActionUp = true; 4254 } 4255 } 4256 } 4257 4258 mDownPositionX = x; 4259 mDownPositionY = y; 4260 mGestureStayedInTapRegion = true; 4261 break; 4262 4263 case MotionEvent.ACTION_POINTER_DOWN: 4264 case MotionEvent.ACTION_POINTER_UP: 4265 // Handle multi-point gestures. Keep min and max offset positions. 4266 // Only activated for devices that correctly handle multi-touch. 4267 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4268 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4269 updateMinAndMaxOffsets(event); 4270 } 4271 break; 4272 4273 case MotionEvent.ACTION_MOVE: 4274 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4275 mTextView.getContext()); 4276 4277 if (mGestureStayedInTapRegion) { 4278 final float deltaX = event.getX() - mDownPositionX; 4279 final float deltaY = event.getY() - mDownPositionY; 4280 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4281 4282 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4283 4284 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4285 mGestureStayedInTapRegion = false; 4286 } 4287 } 4288 4289 if (mStartHandle != null && mStartHandle.isShowing()) { 4290 // Don't do the drag if the handles are showing already. 4291 break; 4292 } 4293 4294 if (mStartOffset != -1) { 4295 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4296 event.getY()); 4297 int offset = rawOffset; 4298 4299 // We don't start "dragging" until the user is past the initial word that 4300 // gets selected on long press. 4301 int firstWordStart = getWordStart(mStartOffset); 4302 int firstWordEnd = getWordEnd(mStartOffset); 4303 if (offset > firstWordEnd || offset < firstWordStart) { 4304 4305 // Basically the goal in the below code is to have the highlight be 4306 // offset so that your finger isn't covering the end point. 4307 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4308 float mx = event.getX(); 4309 float my = event.getY(); 4310 if (mx > fingerOffset) mx -= fingerOffset; 4311 if (my > fingerOffset) my -= fingerOffset; 4312 offset = mTextView.getOffsetForPosition(mx, my); 4313 4314 // Perform the check for closeness at edge of view, if we're very close 4315 // don't adjust the offset to be in front of the finger - otherwise the 4316 // user can't select words at the edge. 4317 if (mTextView.getWidth() - fingerOffset > mx) { 4318 // We're going by word, so we need to make sure that the offset 4319 // that we get is within this, so we'll get the previous boundary. 4320 final WordIterator wordIterator = getWordIteratorWithText(); 4321 4322 final int precedingOffset = wordIterator.preceding(offset); 4323 if (mStartOffset < offset) { 4324 // Expanding with bottom handle, in this case the selection end 4325 // is before the finger. 4326 offset = Math.max(precedingOffset - 1, 0); 4327 } else { 4328 // Expand with the start handle, in this case the selection 4329 // start is before the finger. 4330 if (precedingOffset == WordIterator.DONE) { 4331 offset = 0; 4332 } else { 4333 offset = wordIterator.preceding(precedingOffset); 4334 } 4335 } 4336 } 4337 if (offset == WordIterator.DONE) 4338 offset = rawOffset; 4339 4340 // Need to adjust start offset based on direction of movement. 4341 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4342 : getWordEnd(mStartOffset); 4343 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4344 offset); 4345 } 4346 } 4347 break; 4348 4349 case MotionEvent.ACTION_UP: 4350 mPreviousTapUpTime = SystemClock.uptimeMillis(); 4351 if (mDragAcceleratorActive) { 4352 // No longer dragging to select text, let the parent intercept events. 4353 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4354 4355 show(); 4356 int startOffset = mTextView.getSelectionStart(); 4357 int endOffset = mTextView.getSelectionEnd(); 4358 4359 // Since we don't let drag handles pass once they're visible, we need to 4360 // make sure the start / end locations are correct because the user *can* 4361 // switch directions during the initial drag. 4362 if (endOffset < startOffset) { 4363 int tmp = endOffset; 4364 endOffset = startOffset; 4365 startOffset = tmp; 4366 4367 // Also update the selection with the right offsets in this case. 4368 Selection.setSelection((Spannable) mTextView.getText(), 4369 startOffset, endOffset); 4370 } 4371 4372 // Need to do this to display the handles. 4373 mStartHandle.showAtLocation(startOffset); 4374 mEndHandle.showAtLocation(endOffset); 4375 4376 // No longer the first dragging motion, reset. 4377 mDragAcceleratorActive = false; 4378 mStartOffset = -1; 4379 } 4380 break; 4381 } 4382 } 4383 4384 /** 4385 * @param event 4386 */ 4387 private void updateMinAndMaxOffsets(MotionEvent event) { 4388 int pointerCount = event.getPointerCount(); 4389 for (int index = 0; index < pointerCount; index++) { 4390 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4391 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4392 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4393 } 4394 } 4395 4396 public int getMinTouchOffset() { 4397 return mMinTouchOffset; 4398 } 4399 4400 public int getMaxTouchOffset() { 4401 return mMaxTouchOffset; 4402 } 4403 4404 public void resetTouchOffsets() { 4405 mMinTouchOffset = mMaxTouchOffset = -1; 4406 mStartOffset = -1; 4407 mDragAcceleratorActive = false; 4408 } 4409 4410 /** 4411 * @return true iff this controller is currently used to move the selection start. 4412 */ 4413 public boolean isSelectionStartDragged() { 4414 return mStartHandle != null && mStartHandle.isDragging(); 4415 } 4416 4417 /** 4418 * @return true if the user is selecting text using the drag accelerator. 4419 */ 4420 public boolean isDragAcceleratorActive() { 4421 return mDragAcceleratorActive; 4422 } 4423 4424 public void onTouchModeChanged(boolean isInTouchMode) { 4425 if (!isInTouchMode) { 4426 hide(); 4427 } 4428 } 4429 4430 @Override 4431 public void onDetached() { 4432 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4433 observer.removeOnTouchModeChangeListener(this); 4434 4435 if (mStartHandle != null) mStartHandle.onDetached(); 4436 if (mEndHandle != null) mEndHandle.onDetached(); 4437 } 4438 } 4439 4440 private class CorrectionHighlighter { 4441 private final Path mPath = new Path(); 4442 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4443 private int mStart, mEnd; 4444 private long mFadingStartTime; 4445 private RectF mTempRectF; 4446 private final static int FADE_OUT_DURATION = 400; 4447 4448 public CorrectionHighlighter() { 4449 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4450 applicationScale); 4451 mPaint.setStyle(Paint.Style.FILL); 4452 } 4453 4454 public void highlight(CorrectionInfo info) { 4455 mStart = info.getOffset(); 4456 mEnd = mStart + info.getNewText().length(); 4457 mFadingStartTime = SystemClock.uptimeMillis(); 4458 4459 if (mStart < 0 || mEnd < 0) { 4460 stopAnimation(); 4461 } 4462 } 4463 4464 public void draw(Canvas canvas, int cursorOffsetVertical) { 4465 if (updatePath() && updatePaint()) { 4466 if (cursorOffsetVertical != 0) { 4467 canvas.translate(0, cursorOffsetVertical); 4468 } 4469 4470 canvas.drawPath(mPath, mPaint); 4471 4472 if (cursorOffsetVertical != 0) { 4473 canvas.translate(0, -cursorOffsetVertical); 4474 } 4475 invalidate(true); // TODO invalidate cursor region only 4476 } else { 4477 stopAnimation(); 4478 invalidate(false); // TODO invalidate cursor region only 4479 } 4480 } 4481 4482 private boolean updatePaint() { 4483 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4484 if (duration > FADE_OUT_DURATION) return false; 4485 4486 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4487 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4488 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4489 ((int) (highlightColorAlpha * coef) << 24); 4490 mPaint.setColor(color); 4491 return true; 4492 } 4493 4494 private boolean updatePath() { 4495 final Layout layout = mTextView.getLayout(); 4496 if (layout == null) return false; 4497 4498 // Update in case text is edited while the animation is run 4499 final int length = mTextView.getText().length(); 4500 int start = Math.min(length, mStart); 4501 int end = Math.min(length, mEnd); 4502 4503 mPath.reset(); 4504 layout.getSelectionPath(start, end, mPath); 4505 return true; 4506 } 4507 4508 private void invalidate(boolean delayed) { 4509 if (mTextView.getLayout() == null) return; 4510 4511 if (mTempRectF == null) mTempRectF = new RectF(); 4512 mPath.computeBounds(mTempRectF, false); 4513 4514 int left = mTextView.getCompoundPaddingLeft(); 4515 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4516 4517 if (delayed) { 4518 mTextView.postInvalidateOnAnimation( 4519 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4520 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4521 } else { 4522 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4523 (int) mTempRectF.right, (int) mTempRectF.bottom); 4524 } 4525 } 4526 4527 private void stopAnimation() { 4528 Editor.this.mCorrectionHighlighter = null; 4529 } 4530 } 4531 4532 private static class ErrorPopup extends PopupWindow { 4533 private boolean mAbove = false; 4534 private final TextView mView; 4535 private int mPopupInlineErrorBackgroundId = 0; 4536 private int mPopupInlineErrorAboveBackgroundId = 0; 4537 4538 ErrorPopup(TextView v, int width, int height) { 4539 super(v, width, height); 4540 mView = v; 4541 // Make sure the TextView has a background set as it will be used the first time it is 4542 // shown and positioned. Initialized with below background, which should have 4543 // dimensions identical to the above version for this to work (and is more likely). 4544 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4545 com.android.internal.R.styleable.Theme_errorMessageBackground); 4546 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4547 } 4548 4549 void fixDirection(boolean above) { 4550 mAbove = above; 4551 4552 if (above) { 4553 mPopupInlineErrorAboveBackgroundId = 4554 getResourceId(mPopupInlineErrorAboveBackgroundId, 4555 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4556 } else { 4557 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4558 com.android.internal.R.styleable.Theme_errorMessageBackground); 4559 } 4560 4561 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4562 mPopupInlineErrorBackgroundId); 4563 } 4564 4565 private int getResourceId(int currentId, int index) { 4566 if (currentId == 0) { 4567 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4568 R.styleable.Theme); 4569 currentId = styledAttributes.getResourceId(index, 0); 4570 styledAttributes.recycle(); 4571 } 4572 return currentId; 4573 } 4574 4575 @Override 4576 public void update(int x, int y, int w, int h, boolean force) { 4577 super.update(x, y, w, h, force); 4578 4579 boolean above = isAboveAnchor(); 4580 if (above != mAbove) { 4581 fixDirection(above); 4582 } 4583 } 4584 } 4585 4586 static class InputContentType { 4587 int imeOptions = EditorInfo.IME_NULL; 4588 String privateImeOptions; 4589 CharSequence imeActionLabel; 4590 int imeActionId; 4591 Bundle extras; 4592 OnEditorActionListener onEditorActionListener; 4593 boolean enterDown; 4594 } 4595 4596 static class InputMethodState { 4597 ExtractedTextRequest mExtractedTextRequest; 4598 final ExtractedText mExtractedText = new ExtractedText(); 4599 int mBatchEditNesting; 4600 boolean mCursorChanged; 4601 boolean mSelectionModeChanged; 4602 boolean mContentChanged; 4603 int mChangedStart, mChangedEnd, mChangedDelta; 4604 } 4605 4606 /** 4607 * @return True iff (start, end) is a valid range within the text. 4608 */ 4609 private static boolean isValidRange(CharSequence text, int start, int end) { 4610 return 0 <= start && start <= end && end <= text.length(); 4611 } 4612 4613 /** 4614 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4615 * text being typed (and hence always returns null from the filter() method). 4616 */ 4617 public static class UndoInputFilter implements InputFilter { 4618 private final Editor mEditor; 4619 4620 // Whether the current filter pass is directly caused by an end-user text edit. 4621 private boolean mIsUserEdit; 4622 4623 // Whether the text field is handling an IME composition. Must be parceled in case the user 4624 // rotates the screen during composition. 4625 private boolean mHasComposition; 4626 4627 public UndoInputFilter(Editor editor) { 4628 mEditor = editor; 4629 } 4630 4631 public void saveInstanceState(Parcel parcel) { 4632 parcel.writeInt(mIsUserEdit ? 1 : 0); 4633 parcel.writeInt(mHasComposition ? 1 : 0); 4634 } 4635 4636 public void restoreInstanceState(Parcel parcel) { 4637 mIsUserEdit = parcel.readInt() != 0; 4638 mHasComposition = parcel.readInt() != 0; 4639 } 4640 4641 /** 4642 * Signals that a user-triggered edit is starting. 4643 */ 4644 public void beginBatchEdit() { 4645 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4646 mIsUserEdit = true; 4647 } 4648 4649 public void endBatchEdit() { 4650 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4651 mIsUserEdit = false; 4652 } 4653 4654 @Override 4655 public CharSequence filter(CharSequence source, int start, int end, 4656 Spanned dest, int dstart, int dend) { 4657 if (DEBUG_UNDO) { 4658 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4659 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4660 } 4661 4662 // Check to see if this edit should be tracked for undo. 4663 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4664 return null; 4665 } 4666 4667 // Check for and handle IME composition edits. 4668 if (handleCompositionEdit(source, start, end, dstart)) { 4669 return null; 4670 } 4671 4672 // Handle keyboard edits. 4673 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4674 return null; 4675 } 4676 4677 /** 4678 * Returns true iff the edit was handled, either because it should be ignored or because 4679 * this function created an undo operation for it. 4680 */ 4681 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4682 // Ignore edits while the user is composing. 4683 if (isComposition(source)) { 4684 mHasComposition = true; 4685 return true; 4686 } 4687 final boolean hadComposition = mHasComposition; 4688 mHasComposition = false; 4689 4690 // Check for the transition out of the composing state. 4691 if (hadComposition) { 4692 // If there was no text the user canceled composition. Ignore the edit. 4693 if (start == end) { 4694 return true; 4695 } 4696 4697 // Otherwise the user inserted the composition. 4698 String newText = TextUtils.substring(source, start, end); 4699 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4700 recordEdit(edit, false /* forceMerge */); 4701 return true; 4702 } 4703 4704 // This was neither a composition event nor a transition out of composing. 4705 return false; 4706 } 4707 4708 private void handleKeyboardEdit(CharSequence source, int start, int end, 4709 Spanned dest, int dstart, int dend) { 4710 // An application may install a TextWatcher to provide additional modifications after 4711 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4712 // string). This results in multiple filter() calls for what the user considers to be 4713 // a single operation. Always undo the whole set of changes in one step. 4714 final boolean forceMerge = isInTextWatcher(); 4715 4716 // Build a new operation with all the information from this edit. 4717 String newText = TextUtils.substring(source, start, end); 4718 String oldText = TextUtils.substring(dest, dstart, dend); 4719 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4720 recordEdit(edit, forceMerge); 4721 } 4722 4723 /** 4724 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4725 * If forceMerge is true then the new edit is always merged. 4726 */ 4727 private void recordEdit(EditOperation edit, boolean forceMerge) { 4728 // Fetch the last edit operation and attempt to merge in the new edit. 4729 final UndoManager um = mEditor.mUndoManager; 4730 um.beginUpdate("Edit text"); 4731 EditOperation lastEdit = um.getLastOperation( 4732 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4733 if (lastEdit == null) { 4734 // Add this as the first edit. 4735 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4736 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4737 } else if (forceMerge) { 4738 // Forced merges take priority because they could be the result of a non-user-edit 4739 // change and this case should not create a new undo operation. 4740 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4741 lastEdit.forceMergeWith(edit); 4742 } else if (!mIsUserEdit) { 4743 // An application directly modified the Editable outside of a text edit. Treat this 4744 // as a new change and don't attempt to merge. 4745 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4746 um.commitState(mEditor.mUndoOwner); 4747 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4748 } else if (lastEdit.mergeWith(edit)) { 4749 // Merge succeeded, nothing else to do. 4750 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4751 } else { 4752 // Could not merge with the last edit, so commit the last edit and add this edit. 4753 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4754 um.commitState(mEditor.mUndoOwner); 4755 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4756 } 4757 um.endUpdate(); 4758 } 4759 4760 private boolean canUndoEdit(CharSequence source, int start, int end, 4761 Spanned dest, int dstart, int dend) { 4762 if (!mEditor.mAllowUndo) { 4763 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4764 return false; 4765 } 4766 4767 if (mEditor.mUndoManager.isInUndo()) { 4768 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4769 return false; 4770 } 4771 4772 // Text filters run before input operations are applied. However, some input operations 4773 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4774 // attempt to undo invalid operations. 4775 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4776 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4777 return false; 4778 } 4779 4780 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4781 // on an input field. Skip no-op changes. 4782 if (start == end && dstart == dend) { 4783 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4784 return false; 4785 } 4786 4787 return true; 4788 } 4789 4790 private boolean isComposition(CharSequence source) { 4791 if (!(source instanceof Spannable)) { 4792 return false; 4793 } 4794 // This is a composition edit if the source has a non-zero-length composing span. 4795 Spannable text = (Spannable) source; 4796 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4797 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4798 return composeBegin < composeEnd; 4799 } 4800 4801 private boolean isInTextWatcher() { 4802 CharSequence text = mEditor.mTextView.getText(); 4803 return (text instanceof SpannableStringBuilder) 4804 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4805 } 4806 } 4807 4808 /** 4809 * An operation to undo a single "edit" to a text view. 4810 */ 4811 public static class EditOperation extends UndoOperation<Editor> { 4812 private static final int TYPE_INSERT = 0; 4813 private static final int TYPE_DELETE = 1; 4814 private static final int TYPE_REPLACE = 2; 4815 4816 private int mType; 4817 private String mOldText; 4818 private int mOldTextStart; 4819 private String mNewText; 4820 private int mNewTextStart; 4821 4822 private int mOldCursorPos; 4823 private int mNewCursorPos; 4824 4825 /** 4826 * Constructs an edit operation from a text input operation on editor that replaces the 4827 * oldText starting at dstart with newText. 4828 */ 4829 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 4830 super(editor.mUndoOwner); 4831 mOldText = oldText; 4832 mNewText = newText; 4833 4834 // Determine the type of the edit and store where it occurred. Avoid storing 4835 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4836 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4837 // outside the bounds of the final text). 4838 if (mNewText.length() > 0 && mOldText.length() == 0) { 4839 mType = TYPE_INSERT; 4840 mNewTextStart = dstart; 4841 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4842 mType = TYPE_DELETE; 4843 mOldTextStart = dstart; 4844 } else { 4845 mType = TYPE_REPLACE; 4846 mOldTextStart = mNewTextStart = dstart; 4847 } 4848 4849 // Store cursor data. 4850 mOldCursorPos = editor.mTextView.getSelectionStart(); 4851 mNewCursorPos = dstart + mNewText.length(); 4852 } 4853 4854 public EditOperation(Parcel src, ClassLoader loader) { 4855 super(src, loader); 4856 mType = src.readInt(); 4857 mOldText = src.readString(); 4858 mOldTextStart = src.readInt(); 4859 mNewText = src.readString(); 4860 mNewTextStart = src.readInt(); 4861 mOldCursorPos = src.readInt(); 4862 mNewCursorPos = src.readInt(); 4863 } 4864 4865 @Override 4866 public void writeToParcel(Parcel dest, int flags) { 4867 dest.writeInt(mType); 4868 dest.writeString(mOldText); 4869 dest.writeInt(mOldTextStart); 4870 dest.writeString(mNewText); 4871 dest.writeInt(mNewTextStart); 4872 dest.writeInt(mOldCursorPos); 4873 dest.writeInt(mNewCursorPos); 4874 } 4875 4876 private int getNewTextEnd() { 4877 return mNewTextStart + mNewText.length(); 4878 } 4879 4880 private int getOldTextEnd() { 4881 return mOldTextStart + mOldText.length(); 4882 } 4883 4884 @Override 4885 public void commit() { 4886 } 4887 4888 @Override 4889 public void undo() { 4890 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4891 // Remove the new text and insert the old. 4892 Editor editor = getOwnerData(); 4893 Editable text = (Editable) editor.mTextView.getText(); 4894 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4895 mOldCursorPos); 4896 } 4897 4898 @Override 4899 public void redo() { 4900 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4901 // Remove the old text and insert the new. 4902 Editor editor = getOwnerData(); 4903 Editable text = (Editable) editor.mTextView.getText(); 4904 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4905 mNewCursorPos); 4906 } 4907 4908 /** 4909 * Attempts to merge this existing operation with a new edit. 4910 * @param edit The new edit operation. 4911 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4912 * object unchanged. 4913 */ 4914 private boolean mergeWith(EditOperation edit) { 4915 if (DEBUG_UNDO) { 4916 Log.d(TAG, "mergeWith old " + this); 4917 Log.d(TAG, "mergeWith new " + edit); 4918 } 4919 switch (mType) { 4920 case TYPE_INSERT: 4921 return mergeInsertWith(edit); 4922 case TYPE_DELETE: 4923 return mergeDeleteWith(edit); 4924 case TYPE_REPLACE: 4925 return mergeReplaceWith(edit); 4926 default: 4927 return false; 4928 } 4929 } 4930 4931 private boolean mergeInsertWith(EditOperation edit) { 4932 // Only merge continuous insertions. 4933 if (edit.mType != TYPE_INSERT) { 4934 return false; 4935 } 4936 // Only merge insertions that are contiguous. 4937 if (getNewTextEnd() != edit.mNewTextStart) { 4938 return false; 4939 } 4940 mNewText += edit.mNewText; 4941 mNewCursorPos = edit.mNewCursorPos; 4942 return true; 4943 } 4944 4945 // TODO: Support forward delete. 4946 private boolean mergeDeleteWith(EditOperation edit) { 4947 // Only merge continuous deletes. 4948 if (edit.mType != TYPE_DELETE) { 4949 return false; 4950 } 4951 // Only merge deletions that are contiguous. 4952 if (mOldTextStart != edit.getOldTextEnd()) { 4953 return false; 4954 } 4955 mOldTextStart = edit.mOldTextStart; 4956 mOldText = edit.mOldText + mOldText; 4957 mNewCursorPos = edit.mNewCursorPos; 4958 return true; 4959 } 4960 4961 private boolean mergeReplaceWith(EditOperation edit) { 4962 // Replacements can merge only with adjacent inserts. 4963 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 4964 return false; 4965 } 4966 mOldText += edit.mOldText; 4967 mNewText += edit.mNewText; 4968 mNewCursorPos = edit.mNewCursorPos; 4969 return true; 4970 } 4971 4972 /** 4973 * Forcibly creates a single merged edit operation by simulating the entire text 4974 * contents being replaced. 4975 */ 4976 public void forceMergeWith(EditOperation edit) { 4977 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 4978 Editor editor = getOwnerData(); 4979 4980 // Copy the text of the current field. 4981 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 4982 // but would require two parallel implementations of modifyText() because Editable and 4983 // StringBuilder do not share an interface for replace/delete/insert. 4984 Editable editable = (Editable) editor.mTextView.getText(); 4985 Editable originalText = new SpannableStringBuilder(editable.toString()); 4986 4987 // Roll back the last operation. 4988 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4989 mOldCursorPos); 4990 4991 // Clone the text again and apply the new operation. 4992 Editable finalText = new SpannableStringBuilder(editable.toString()); 4993 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 4994 edit.mNewTextStart, edit.mNewCursorPos); 4995 4996 // Convert this operation into a non-mergeable replacement of the entire string. 4997 mType = TYPE_REPLACE; 4998 mNewText = finalText.toString(); 4999 mNewTextStart = 0; 5000 mOldText = originalText.toString(); 5001 mOldTextStart = 0; 5002 mNewCursorPos = edit.mNewCursorPos; 5003 // mOldCursorPos is unchanged. 5004 } 5005 5006 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5007 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5008 // Apply the edit if it is still valid. 5009 if (isValidRange(text, deleteFrom, deleteTo) && 5010 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5011 if (deleteFrom != deleteTo) { 5012 text.delete(deleteFrom, deleteTo); 5013 } 5014 if (newText.length() != 0) { 5015 text.insert(newTextInsertAt, newText); 5016 } 5017 } 5018 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5019 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5020 // TODO: Select all the text that was undone. 5021 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5022 Selection.setSelection(text, newCursorPos); 5023 } 5024 } 5025 5026 private String getTypeString() { 5027 switch (mType) { 5028 case TYPE_INSERT: 5029 return "insert"; 5030 case TYPE_DELETE: 5031 return "delete"; 5032 case TYPE_REPLACE: 5033 return "replace"; 5034 default: 5035 return ""; 5036 } 5037 } 5038 5039 @Override 5040 public String toString() { 5041 return "[mType=" + getTypeString() + ", " + 5042 "mOldText=" + mOldText + ", " + 5043 "mOldTextStart=" + mOldTextStart + ", " + 5044 "mNewText=" + mNewText + ", " + 5045 "mNewTextStart=" + mNewTextStart + ", " + 5046 "mOldCursorPos=" + mOldCursorPos + ", " + 5047 "mNewCursorPos=" + mNewCursorPos + "]"; 5048 } 5049 5050 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5051 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5052 @Override 5053 public EditOperation createFromParcel(Parcel in) { 5054 return new EditOperation(in, null); 5055 } 5056 5057 @Override 5058 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5059 return new EditOperation(in, loader); 5060 } 5061 5062 @Override 5063 public EditOperation[] newArray(int size) { 5064 return new EditOperation[size]; 5065 } 5066 }; 5067 } 5068} 5069