Editor.java revision 6351e660142a2319c142346628f131c494ded99c
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.content.UndoManager; 20import android.content.UndoOperation; 21import android.content.UndoOwner; 22import android.os.Build; 23import android.os.Parcel; 24import android.os.Parcelable; 25import android.text.InputFilter; 26import com.android.internal.util.ArrayUtils; 27import com.android.internal.util.GrowingArrayUtils; 28import com.android.internal.view.menu.MenuBuilder; 29import com.android.internal.widget.EditableInputConnection; 30 31import android.R; 32import android.app.PendingIntent; 33import android.app.PendingIntent.CanceledException; 34import android.content.ClipData; 35import android.content.ClipData.Item; 36import android.content.Context; 37import android.content.Intent; 38import android.content.pm.PackageManager; 39import android.content.res.TypedArray; 40import android.graphics.Canvas; 41import android.graphics.Color; 42import android.graphics.Matrix; 43import android.graphics.Paint; 44import android.graphics.Path; 45import android.graphics.Rect; 46import android.graphics.RectF; 47import android.graphics.drawable.Drawable; 48import android.inputmethodservice.ExtractEditText; 49import android.os.Bundle; 50import android.os.Handler; 51import android.os.ParcelableParcel; 52import android.os.SystemClock; 53import android.provider.Settings; 54import android.text.DynamicLayout; 55import android.text.Editable; 56import android.text.InputType; 57import android.text.Layout; 58import android.text.ParcelableSpan; 59import android.text.Selection; 60import android.text.SpanWatcher; 61import android.text.Spannable; 62import android.text.SpannableStringBuilder; 63import android.text.Spanned; 64import android.text.StaticLayout; 65import android.text.TextUtils; 66import android.text.method.KeyListener; 67import android.text.method.MetaKeyKeyListener; 68import android.text.method.MovementMethod; 69import android.text.method.PasswordTransformationMethod; 70import android.text.method.WordIterator; 71import android.text.style.EasyEditSpan; 72import android.text.style.SuggestionRangeSpan; 73import android.text.style.SuggestionSpan; 74import android.text.style.TextAppearanceSpan; 75import android.text.style.URLSpan; 76import android.util.DisplayMetrics; 77import android.util.Log; 78import android.view.ActionMode; 79import android.view.ActionMode.Callback; 80import android.view.RenderNode; 81import android.view.DragEvent; 82import android.view.Gravity; 83import android.view.HardwareCanvas; 84import android.view.LayoutInflater; 85import android.view.Menu; 86import android.view.MenuItem; 87import android.view.MotionEvent; 88import android.view.View; 89import android.view.View.DragShadowBuilder; 90import android.view.View.OnClickListener; 91import android.view.ViewConfiguration; 92import android.view.ViewGroup; 93import android.view.ViewGroup.LayoutParams; 94import android.view.ViewParent; 95import android.view.ViewTreeObserver; 96import android.view.WindowManager; 97import android.view.inputmethod.CorrectionInfo; 98import android.view.inputmethod.CursorAnchorInfo; 99import android.view.inputmethod.EditorInfo; 100import android.view.inputmethod.ExtractedText; 101import android.view.inputmethod.ExtractedTextRequest; 102import android.view.inputmethod.InputConnection; 103import android.view.inputmethod.InputMethodManager; 104import android.widget.AdapterView.OnItemClickListener; 105import android.widget.TextView.Drawables; 106import android.widget.TextView.OnEditorActionListener; 107 108import java.text.BreakIterator; 109import java.util.Arrays; 110import java.util.Comparator; 111import java.util.HashMap; 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 TextDisplayList { 148 RenderNode displayList; 149 boolean isDirty; 150 public TextDisplayList(String name) { 151 isDirty = true; 152 displayList = RenderNode.create(name, null); 153 } 154 boolean needsRecord() { return isDirty || !displayList.isValid(); } 155 } 156 TextDisplayList[] mTextDisplayLists; 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 // For now there is only undo state. 240 return (ParcelableParcel) mUndoManager.saveInstanceState(); 241 } 242 243 void restoreInstanceState(ParcelableParcel state) { 244 mUndoManager.restoreInstanceState(state); 245 // Re-associate this object as the owner of undo state. 246 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 247 } 248 249 /** 250 * Forgets all undo and redo operations for this Editor. 251 */ 252 void forgetUndoRedo() { 253 UndoOwner[] owners = { mUndoOwner }; 254 mUndoManager.forgetUndos(owners, -1 /* all */); 255 mUndoManager.forgetRedos(owners, -1 /* all */); 256 } 257 258 boolean canUndo() { 259 UndoOwner[] owners = { mUndoOwner }; 260 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 261 } 262 263 boolean canRedo() { 264 UndoOwner[] owners = { mUndoOwner }; 265 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 266 } 267 268 void undo() { 269 if (!mAllowUndo) { 270 return; 271 } 272 UndoOwner[] owners = { mUndoOwner }; 273 mUndoManager.undo(owners, 1); // Undo 1 action. 274 } 275 276 void redo() { 277 if (!mAllowUndo) { 278 return; 279 } 280 UndoOwner[] owners = { mUndoOwner }; 281 mUndoManager.redo(owners, 1); // Redo 1 action. 282 } 283 284 void onAttachedToWindow() { 285 if (mShowErrorAfterAttach) { 286 showError(); 287 mShowErrorAfterAttach = false; 288 } 289 mTemporaryDetach = false; 290 291 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 292 // No need to create the controller. 293 // The get method will add the listener on controller creation. 294 if (mInsertionPointCursorController != null) { 295 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 296 } 297 if (mSelectionModifierCursorController != null) { 298 mSelectionModifierCursorController.resetTouchOffsets(); 299 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 300 } 301 updateSpellCheckSpans(0, mTextView.getText().length(), 302 true /* create the spell checker if needed */); 303 304 if (mTextView.hasTransientState() && 305 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 306 // Since transient state is reference counted make sure it stays matched 307 // with our own calls to it for managing selection. 308 // The action mode callback will set this back again when/if the action mode starts. 309 mTextView.setHasTransientState(false); 310 311 // We had an active selection from before, start the selection mode. 312 startSelectionActionModeWithSelection(); 313 } 314 315 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 316 } 317 318 void onDetachedFromWindow() { 319 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 320 321 if (mError != null) { 322 hideError(); 323 } 324 325 if (mBlink != null) { 326 mBlink.removeCallbacks(mBlink); 327 } 328 329 if (mInsertionPointCursorController != null) { 330 mInsertionPointCursorController.onDetached(); 331 } 332 333 if (mSelectionModifierCursorController != null) { 334 mSelectionModifierCursorController.onDetached(); 335 } 336 337 if (mShowSuggestionRunnable != null) { 338 mTextView.removeCallbacks(mShowSuggestionRunnable); 339 } 340 341 destroyDisplayListsData(); 342 343 if (mSpellChecker != null) { 344 mSpellChecker.closeSession(); 345 // Forces the creation of a new SpellChecker next time this window is created. 346 // Will handle the cases where the settings has been changed in the meantime. 347 mSpellChecker = null; 348 } 349 350 mPreserveDetachedSelection = true; 351 hideControllers(); 352 mPreserveDetachedSelection = false; 353 mTemporaryDetach = false; 354 } 355 356 private void destroyDisplayListsData() { 357 if (mTextDisplayLists != null) { 358 for (int i = 0; i < mTextDisplayLists.length; i++) { 359 RenderNode displayList = mTextDisplayLists[i] != null 360 ? mTextDisplayLists[i].displayList : null; 361 if (displayList != null && displayList.isValid()) { 362 displayList.destroyDisplayListData(); 363 } 364 } 365 } 366 } 367 368 private void showError() { 369 if (mTextView.getWindowToken() == null) { 370 mShowErrorAfterAttach = true; 371 return; 372 } 373 374 if (mErrorPopup == null) { 375 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 376 final TextView err = (TextView) inflater.inflate( 377 com.android.internal.R.layout.textview_hint, null); 378 379 final float scale = mTextView.getResources().getDisplayMetrics().density; 380 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 381 mErrorPopup.setFocusable(false); 382 // The user is entering text, so the input method is needed. We 383 // don't want the popup to be displayed on top of it. 384 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 385 } 386 387 TextView tv = (TextView) mErrorPopup.getContentView(); 388 chooseSize(mErrorPopup, mError, tv); 389 tv.setText(mError); 390 391 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 392 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 393 } 394 395 public void setError(CharSequence error, Drawable icon) { 396 mError = TextUtils.stringOrSpannedString(error); 397 mErrorWasChanged = true; 398 399 if (mError == null) { 400 setErrorIcon(null); 401 if (mErrorPopup != null) { 402 if (mErrorPopup.isShowing()) { 403 mErrorPopup.dismiss(); 404 } 405 406 mErrorPopup = null; 407 } 408 mShowErrorAfterAttach = false; 409 } else { 410 setErrorIcon(icon); 411 if (mTextView.isFocused()) { 412 showError(); 413 } 414 } 415 } 416 417 private void setErrorIcon(Drawable icon) { 418 Drawables dr = mTextView.mDrawables; 419 if (dr == null) { 420 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 421 } 422 dr.setErrorDrawable(icon, mTextView); 423 424 mTextView.resetResolvedDrawables(); 425 mTextView.invalidate(); 426 mTextView.requestLayout(); 427 } 428 429 private void hideError() { 430 if (mErrorPopup != null) { 431 if (mErrorPopup.isShowing()) { 432 mErrorPopup.dismiss(); 433 } 434 } 435 436 mShowErrorAfterAttach = false; 437 } 438 439 /** 440 * Returns the X offset to make the pointy top of the error point 441 * at the middle of the error icon. 442 */ 443 private int getErrorX() { 444 /* 445 * The "25" is the distance between the point and the right edge 446 * of the background 447 */ 448 final float scale = mTextView.getResources().getDisplayMetrics().density; 449 450 final Drawables dr = mTextView.mDrawables; 451 452 final int layoutDirection = mTextView.getLayoutDirection(); 453 int errorX; 454 int offset; 455 switch (layoutDirection) { 456 default: 457 case View.LAYOUT_DIRECTION_LTR: 458 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 459 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 460 mTextView.getPaddingRight() + offset; 461 break; 462 case View.LAYOUT_DIRECTION_RTL: 463 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 464 errorX = mTextView.getPaddingLeft() + offset; 465 break; 466 } 467 return errorX; 468 } 469 470 /** 471 * Returns the Y offset to make the pointy top of the error point 472 * at the bottom of the error icon. 473 */ 474 private int getErrorY() { 475 /* 476 * Compound, not extended, because the icon is not clipped 477 * if the text height is smaller. 478 */ 479 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 480 int vspace = mTextView.getBottom() - mTextView.getTop() - 481 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 482 483 final Drawables dr = mTextView.mDrawables; 484 485 final int layoutDirection = mTextView.getLayoutDirection(); 486 int height; 487 switch (layoutDirection) { 488 default: 489 case View.LAYOUT_DIRECTION_LTR: 490 height = (dr != null ? dr.mDrawableHeightRight : 0); 491 break; 492 case View.LAYOUT_DIRECTION_RTL: 493 height = (dr != null ? dr.mDrawableHeightLeft : 0); 494 break; 495 } 496 497 int icontop = compoundPaddingTop + (vspace - height) / 2; 498 499 /* 500 * The "2" is the distance between the point and the top edge 501 * of the background. 502 */ 503 final float scale = mTextView.getResources().getDisplayMetrics().density; 504 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 505 } 506 507 void createInputContentTypeIfNeeded() { 508 if (mInputContentType == null) { 509 mInputContentType = new InputContentType(); 510 } 511 } 512 513 void createInputMethodStateIfNeeded() { 514 if (mInputMethodState == null) { 515 mInputMethodState = new InputMethodState(); 516 } 517 } 518 519 boolean isCursorVisible() { 520 // The default value is true, even when there is no associated Editor 521 return mCursorVisible && mTextView.isTextEditable(); 522 } 523 524 void prepareCursorControllers() { 525 boolean windowSupportsHandles = false; 526 527 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 528 if (params instanceof WindowManager.LayoutParams) { 529 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 530 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 531 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 532 } 533 534 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 535 mInsertionControllerEnabled = enabled && isCursorVisible(); 536 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 537 538 if (!mInsertionControllerEnabled) { 539 hideInsertionPointCursorController(); 540 if (mInsertionPointCursorController != null) { 541 mInsertionPointCursorController.onDetached(); 542 mInsertionPointCursorController = null; 543 } 544 } 545 546 if (!mSelectionControllerEnabled) { 547 stopSelectionActionMode(); 548 if (mSelectionModifierCursorController != null) { 549 mSelectionModifierCursorController.onDetached(); 550 mSelectionModifierCursorController = null; 551 } 552 } 553 } 554 555 private void hideInsertionPointCursorController() { 556 if (mInsertionPointCursorController != null) { 557 mInsertionPointCursorController.hide(); 558 } 559 } 560 561 /** 562 * Hides the insertion controller and stops text selection mode, hiding the selection controller 563 */ 564 void hideControllers() { 565 hideCursorControllers(); 566 hideSpanControllers(); 567 } 568 569 private void hideSpanControllers() { 570 if (mSpanController != null) { 571 mSpanController.hide(); 572 } 573 } 574 575 private void hideCursorControllers() { 576 if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) { 577 // Should be done before hide insertion point controller since it triggers a show of it 578 mSuggestionsPopupWindow.hide(); 579 } 580 hideInsertionPointCursorController(); 581 stopSelectionActionMode(); 582 } 583 584 /** 585 * Create new SpellCheckSpans on the modified region. 586 */ 587 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 588 // Remove spans whose adjacent characters are text not punctuation 589 mTextView.removeAdjacentSuggestionSpans(start); 590 mTextView.removeAdjacentSuggestionSpans(end); 591 592 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 593 !(mTextView instanceof ExtractEditText)) { 594 if (mSpellChecker == null && createSpellChecker) { 595 mSpellChecker = new SpellChecker(mTextView); 596 } 597 if (mSpellChecker != null) { 598 mSpellChecker.spellCheck(start, end); 599 } 600 } 601 } 602 603 void onScreenStateChanged(int screenState) { 604 switch (screenState) { 605 case View.SCREEN_STATE_ON: 606 resumeBlink(); 607 break; 608 case View.SCREEN_STATE_OFF: 609 suspendBlink(); 610 break; 611 } 612 } 613 614 private void suspendBlink() { 615 if (mBlink != null) { 616 mBlink.cancel(); 617 } 618 } 619 620 private void resumeBlink() { 621 if (mBlink != null) { 622 mBlink.uncancel(); 623 makeBlink(); 624 } 625 } 626 627 void adjustInputType(boolean password, boolean passwordInputType, 628 boolean webPasswordInputType, boolean numberPasswordInputType) { 629 // mInputType has been set from inputType, possibly modified by mInputMethod. 630 // Specialize mInputType to [web]password if we have a text class and the original input 631 // type was a password. 632 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 633 if (password || passwordInputType) { 634 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 635 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 636 } 637 if (webPasswordInputType) { 638 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 639 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 640 } 641 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 642 if (numberPasswordInputType) { 643 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 644 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 645 } 646 } 647 } 648 649 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 650 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 651 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 652 653 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 654 com.android.internal.R.dimen.textview_error_popup_default_width); 655 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 656 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 657 float max = 0; 658 for (int i = 0; i < l.getLineCount(); i++) { 659 max = Math.max(max, l.getLineWidth(i)); 660 } 661 662 /* 663 * Now set the popup size to be big enough for the text plus the border capped 664 * to DEFAULT_MAX_POPUP_WIDTH 665 */ 666 pop.setWidth(wid + (int) Math.ceil(max)); 667 pop.setHeight(ht + l.getHeight()); 668 } 669 670 void setFrame() { 671 if (mErrorPopup != null) { 672 TextView tv = (TextView) mErrorPopup.getContentView(); 673 chooseSize(mErrorPopup, mError, tv); 674 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 675 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 676 } 677 } 678 679 /** 680 * Unlike {@link TextView#textCanBeSelected()}, this method is based on the <i>current</i> state 681 * of the TextView. textCanBeSelected() has to be true (this is one of the conditions to have 682 * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient. 683 */ 684 private boolean canSelectText() { 685 return hasSelectionController() && mTextView.getText().length() != 0; 686 } 687 688 /** 689 * It would be better to rely on the input type for everything. A password inputType should have 690 * a password transformation. We should hence use isPasswordInputType instead of this method. 691 * 692 * We should: 693 * - Call setInputType in setKeyListener instead of changing the input type directly (which 694 * would install the correct transformation). 695 * - Refuse the installation of a non-password transformation in setTransformation if the input 696 * type is password. 697 * 698 * However, this is like this for legacy reasons and we cannot break existing apps. This method 699 * is useful since it matches what the user can see (obfuscated text or not). 700 * 701 * @return true if the current transformation method is of the password type. 702 */ 703 private boolean hasPasswordTransformationMethod() { 704 return mTextView.getTransformationMethod() instanceof PasswordTransformationMethod; 705 } 706 707 private int getWordStart(int offset) { 708 // FIXME - For this and similar methods we're not doing anything to check if there's 709 // a LocaleSpan in the text, this may be something we should try handling or checking for. 710 int retOffset = getWordIteratorWithText().getBeginning(offset); 711 if (retOffset == BreakIterator.DONE) retOffset = offset; 712 return retOffset; 713 } 714 715 private int getWordEnd(int offset, boolean includePunctuation) { 716 int retOffset = getWordIteratorWithText().getEnd(offset); 717 if (retOffset == BreakIterator.DONE) { 718 retOffset = offset; 719 } else if (includePunctuation) { 720 retOffset = handlePunctuation(retOffset); 721 } 722 return retOffset; 723 } 724 725 private boolean isEndBoundary(int offset) { 726 int thisEnd = getWordEnd(offset, false); 727 return offset == thisEnd; 728 } 729 730 private boolean isStartBoundary(int offset) { 731 int thisStart = getWordStart(offset); 732 return thisStart == offset; 733 } 734 735 private int handlePunctuation(int offset) { 736 // FIXME - Check with UX how repeated ending punctuation should be handled. 737 // FIXME - Check with UX if / how we would handle non sentence ending characters. 738 // FIXME - Consider punctuation in different languages. 739 CharSequence text = mTextView.getText(); 740 if (offset < text.length()) { 741 int c = Character.codePointAt(text, offset); 742 if (c == 0x002e /* period */|| c == 0x003f /* question mark */ 743 || c == 0x0021 /* exclamation mark */) { 744 offset = Character.offsetByCodePoints(text, offset, 1); 745 } 746 } 747 return offset; 748 } 749 750 /** 751 * Adjusts selection to the word under last touch offset. Return true if the operation was 752 * successfully performed. 753 */ 754 private boolean selectCurrentWord() { 755 if (!canSelectText()) { 756 return false; 757 } 758 759 if (hasPasswordTransformationMethod()) { 760 // Always select all on a password field. 761 // Cut/copy menu entries are not available for passwords, but being able to select all 762 // is however useful to delete or paste to replace the entire content. 763 return mTextView.selectAllText(); 764 } 765 766 int inputType = mTextView.getInputType(); 767 int klass = inputType & InputType.TYPE_MASK_CLASS; 768 int variation = inputType & InputType.TYPE_MASK_VARIATION; 769 770 // Specific text field types: select the entire text for these 771 if (klass == InputType.TYPE_CLASS_NUMBER || 772 klass == InputType.TYPE_CLASS_PHONE || 773 klass == InputType.TYPE_CLASS_DATETIME || 774 variation == InputType.TYPE_TEXT_VARIATION_URI || 775 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 776 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 777 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 778 return mTextView.selectAllText(); 779 } 780 781 long lastTouchOffsets = getLastTouchOffsets(); 782 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 783 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 784 785 // Safety check in case standard touch event handling has been bypassed 786 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 787 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 788 789 int selectionStart, selectionEnd; 790 791 // If a URLSpan (web address, email, phone...) is found at that position, select it. 792 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 793 getSpans(minOffset, maxOffset, URLSpan.class); 794 if (urlSpans.length >= 1) { 795 URLSpan urlSpan = urlSpans[0]; 796 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 797 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 798 } else { 799 // FIXME - We should check if there's a LocaleSpan in the text, this may be 800 // something we should try handling or checking for. 801 final WordIterator wordIterator = getWordIterator(); 802 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 803 804 selectionStart = wordIterator.getBeginning(minOffset); 805 selectionEnd = wordIterator.getEnd(maxOffset); 806 807 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 808 selectionStart == selectionEnd) { 809 // Possible when the word iterator does not properly handle the text's language 810 long range = getCharRange(minOffset); 811 selectionStart = TextUtils.unpackRangeStartFromLong(range); 812 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 813 } 814 } 815 816 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 817 return selectionEnd > selectionStart; 818 } 819 820 void onLocaleChanged() { 821 // Will be re-created on demand in getWordIterator with the proper new locale 822 mWordIterator = null; 823 mWordIteratorWithText = null; 824 } 825 826 /** 827 * @hide 828 */ 829 public WordIterator getWordIterator() { 830 if (mWordIterator == null) { 831 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 832 } 833 return mWordIterator; 834 } 835 836 private WordIterator getWordIteratorWithText() { 837 if (mWordIteratorWithText == null) { 838 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 839 mUpdateWordIteratorText = true; 840 } 841 if (mUpdateWordIteratorText) { 842 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 843 // to the user's selection is needed. A possible solution would be to 844 // copy some number N of characters near the selection and then when the 845 // user approaches N then we'd do another copy of the next N characters. 846 CharSequence text = mTextView.getText(); 847 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 848 mUpdateWordIteratorText = false; 849 } 850 return mWordIteratorWithText; 851 } 852 853 private long getCharRange(int offset) { 854 final int textLength = mTextView.getText().length(); 855 if (offset + 1 < textLength) { 856 final char currentChar = mTextView.getText().charAt(offset); 857 final char nextChar = mTextView.getText().charAt(offset + 1); 858 if (Character.isSurrogatePair(currentChar, nextChar)) { 859 return TextUtils.packRangeInLong(offset, offset + 2); 860 } 861 } 862 if (offset < textLength) { 863 return TextUtils.packRangeInLong(offset, offset + 1); 864 } 865 if (offset - 2 >= 0) { 866 final char previousChar = mTextView.getText().charAt(offset - 1); 867 final char previousPreviousChar = mTextView.getText().charAt(offset - 2); 868 if (Character.isSurrogatePair(previousPreviousChar, previousChar)) { 869 return TextUtils.packRangeInLong(offset - 2, offset); 870 } 871 } 872 if (offset - 1 >= 0) { 873 return TextUtils.packRangeInLong(offset - 1, offset); 874 } 875 return TextUtils.packRangeInLong(offset, offset); 876 } 877 878 private boolean touchPositionIsInSelection() { 879 int selectionStart = mTextView.getSelectionStart(); 880 int selectionEnd = mTextView.getSelectionEnd(); 881 882 if (selectionStart == selectionEnd) { 883 return false; 884 } 885 886 if (selectionStart > selectionEnd) { 887 int tmp = selectionStart; 888 selectionStart = selectionEnd; 889 selectionEnd = tmp; 890 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 891 } 892 893 SelectionModifierCursorController selectionController = getSelectionController(); 894 int minOffset = selectionController.getMinTouchOffset(); 895 int maxOffset = selectionController.getMaxTouchOffset(); 896 897 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 898 } 899 900 private PositionListener getPositionListener() { 901 if (mPositionListener == null) { 902 mPositionListener = new PositionListener(); 903 } 904 return mPositionListener; 905 } 906 907 private interface TextViewPositionListener { 908 public void updatePosition(int parentPositionX, int parentPositionY, 909 boolean parentPositionChanged, boolean parentScrolled); 910 } 911 912 private boolean isPositionVisible(final float positionX, final float positionY) { 913 synchronized (TEMP_POSITION) { 914 final float[] position = TEMP_POSITION; 915 position[0] = positionX; 916 position[1] = positionY; 917 View view = mTextView; 918 919 while (view != null) { 920 if (view != mTextView) { 921 // Local scroll is already taken into account in positionX/Y 922 position[0] -= view.getScrollX(); 923 position[1] -= view.getScrollY(); 924 } 925 926 if (position[0] < 0 || position[1] < 0 || 927 position[0] > view.getWidth() || position[1] > view.getHeight()) { 928 return false; 929 } 930 931 if (!view.getMatrix().isIdentity()) { 932 view.getMatrix().mapPoints(position); 933 } 934 935 position[0] += view.getLeft(); 936 position[1] += view.getTop(); 937 938 final ViewParent parent = view.getParent(); 939 if (parent instanceof View) { 940 view = (View) parent; 941 } else { 942 // We've reached the ViewRoot, stop iterating 943 view = null; 944 } 945 } 946 } 947 948 // We've been able to walk up the view hierarchy and the position was never clipped 949 return true; 950 } 951 952 private boolean isOffsetVisible(int offset) { 953 Layout layout = mTextView.getLayout(); 954 if (layout == null) return false; 955 956 final int line = layout.getLineForOffset(offset); 957 final int lineBottom = layout.getLineBottom(line); 958 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 959 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 960 lineBottom + mTextView.viewportToContentVerticalOffset()); 961 } 962 963 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 964 * in the view. Returns false when the position is in the empty space of left/right of text. 965 */ 966 private boolean isPositionOnText(float x, float y) { 967 Layout layout = mTextView.getLayout(); 968 if (layout == null) return false; 969 970 final int line = mTextView.getLineAtCoordinate(y); 971 x = mTextView.convertToLocalHorizontalCoordinate(x); 972 973 if (x < layout.getLineLeft(line)) return false; 974 if (x > layout.getLineRight(line)) return false; 975 return true; 976 } 977 978 public boolean performLongClick(boolean handled) { 979 // Long press in empty space moves cursor and starts the selection action mode. 980 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 981 mInsertionControllerEnabled) { 982 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 983 mLastDownPositionY); 984 stopSelectionActionMode(); 985 Selection.setSelection((Spannable) mTextView.getText(), offset); 986 getInsertionController().show(); 987 startSelectionActionModeWithoutSelection(); 988 handled = true; 989 } 990 991 if (!handled && mSelectionActionMode != null) { 992 if (touchPositionIsInSelection()) { 993 // Start a drag 994 final int start = mTextView.getSelectionStart(); 995 final int end = mTextView.getSelectionEnd(); 996 CharSequence selectedText = mTextView.getTransformedText(start, end); 997 ClipData data = ClipData.newPlainText(null, selectedText); 998 DragLocalState localState = new DragLocalState(mTextView, start, end); 999 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0); 1000 stopSelectionActionMode(); 1001 } else { 1002 stopSelectionActionMode(); 1003 startSelectionActionModeWithSelection(); 1004 } 1005 handled = true; 1006 } 1007 1008 // Start a new selection 1009 if (!handled) { 1010 handled = startSelectionActionModeWithSelection(); 1011 } 1012 1013 return handled; 1014 } 1015 1016 private long getLastTouchOffsets() { 1017 SelectionModifierCursorController selectionController = getSelectionController(); 1018 final int minOffset = selectionController.getMinTouchOffset(); 1019 final int maxOffset = selectionController.getMaxTouchOffset(); 1020 return TextUtils.packRangeInLong(minOffset, maxOffset); 1021 } 1022 1023 void onFocusChanged(boolean focused, int direction) { 1024 mShowCursor = SystemClock.uptimeMillis(); 1025 ensureEndedBatchEdit(); 1026 1027 if (focused) { 1028 int selStart = mTextView.getSelectionStart(); 1029 int selEnd = mTextView.getSelectionEnd(); 1030 1031 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1032 // mode for these, unless there was a specific selection already started. 1033 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1034 selEnd == mTextView.getText().length(); 1035 1036 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1037 !isFocusHighlighted; 1038 1039 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1040 // If a tap was used to give focus to that view, move cursor at tap position. 1041 // Has to be done before onTakeFocus, which can be overloaded. 1042 final int lastTapPosition = getLastTapPosition(); 1043 if (lastTapPosition >= 0) { 1044 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1045 } 1046 1047 // Note this may have to be moved out of the Editor class 1048 MovementMethod mMovement = mTextView.getMovementMethod(); 1049 if (mMovement != null) { 1050 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1051 } 1052 1053 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1054 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1055 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1056 // This special case ensure that we keep current selection in that case. 1057 // It would be better to know why the DecorView does not have focus at that time. 1058 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1059 selStart >= 0 && selEnd >= 0) { 1060 /* 1061 * Someone intentionally set the selection, so let them 1062 * do whatever it is that they wanted to do instead of 1063 * the default on-focus behavior. We reset the selection 1064 * here instead of just skipping the onTakeFocus() call 1065 * because some movement methods do something other than 1066 * just setting the selection in theirs and we still 1067 * need to go through that path. 1068 */ 1069 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1070 } 1071 1072 if (mSelectAllOnFocus) { 1073 mTextView.selectAllText(); 1074 } 1075 1076 mTouchFocusSelected = true; 1077 } 1078 1079 mFrozenWithFocus = false; 1080 mSelectionMoved = false; 1081 1082 if (mError != null) { 1083 showError(); 1084 } 1085 1086 makeBlink(); 1087 } else { 1088 if (mError != null) { 1089 hideError(); 1090 } 1091 // Don't leave us in the middle of a batch edit. 1092 mTextView.onEndBatchEdit(); 1093 1094 if (mTextView instanceof ExtractEditText) { 1095 // terminateTextSelectionMode removes selection, which we want to keep when 1096 // ExtractEditText goes out of focus. 1097 final int selStart = mTextView.getSelectionStart(); 1098 final int selEnd = mTextView.getSelectionEnd(); 1099 hideControllers(); 1100 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1101 } else { 1102 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1103 hideControllers(); 1104 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1105 downgradeEasyCorrectionSpans(); 1106 } 1107 1108 // No need to create the controller 1109 if (mSelectionModifierCursorController != null) { 1110 mSelectionModifierCursorController.resetTouchOffsets(); 1111 } 1112 } 1113 } 1114 1115 /** 1116 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1117 * span. 1118 */ 1119 private void downgradeEasyCorrectionSpans() { 1120 CharSequence text = mTextView.getText(); 1121 if (text instanceof Spannable) { 1122 Spannable spannable = (Spannable) text; 1123 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1124 spannable.length(), SuggestionSpan.class); 1125 for (int i = 0; i < suggestionSpans.length; i++) { 1126 int flags = suggestionSpans[i].getFlags(); 1127 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1128 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1129 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1130 suggestionSpans[i].setFlags(flags); 1131 } 1132 } 1133 } 1134 } 1135 1136 void sendOnTextChanged(int start, int after) { 1137 updateSpellCheckSpans(start, start + after, false); 1138 1139 // Flip flag to indicate the word iterator needs to have the text reset. 1140 mUpdateWordIteratorText = true; 1141 1142 // Hide the controllers as soon as text is modified (typing, procedural...) 1143 // We do not hide the span controllers, since they can be added when a new text is 1144 // inserted into the text view (voice IME). 1145 hideCursorControllers(); 1146 } 1147 1148 private int getLastTapPosition() { 1149 // No need to create the controller at that point, no last tap position saved 1150 if (mSelectionModifierCursorController != null) { 1151 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1152 if (lastTapPosition >= 0) { 1153 // Safety check, should not be possible. 1154 if (lastTapPosition > mTextView.getText().length()) { 1155 lastTapPosition = mTextView.getText().length(); 1156 } 1157 return lastTapPosition; 1158 } 1159 } 1160 1161 return -1; 1162 } 1163 1164 void onWindowFocusChanged(boolean hasWindowFocus) { 1165 if (hasWindowFocus) { 1166 if (mBlink != null) { 1167 mBlink.uncancel(); 1168 makeBlink(); 1169 } 1170 } else { 1171 if (mBlink != null) { 1172 mBlink.cancel(); 1173 } 1174 if (mInputContentType != null) { 1175 mInputContentType.enterDown = false; 1176 } 1177 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1178 hideControllers(); 1179 if (mSuggestionsPopupWindow != null) { 1180 mSuggestionsPopupWindow.onParentLostFocus(); 1181 } 1182 1183 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1184 ensureEndedBatchEdit(); 1185 } 1186 } 1187 1188 void onTouchEvent(MotionEvent event) { 1189 if (hasSelectionController()) { 1190 getSelectionController().onTouchEvent(event); 1191 } 1192 1193 if (mShowSuggestionRunnable != null) { 1194 mTextView.removeCallbacks(mShowSuggestionRunnable); 1195 mShowSuggestionRunnable = null; 1196 } 1197 1198 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1199 mLastDownPositionX = event.getX(); 1200 mLastDownPositionY = event.getY(); 1201 1202 // Reset this state; it will be re-set if super.onTouchEvent 1203 // causes focus to move to the view. 1204 mTouchFocusSelected = false; 1205 mIgnoreActionUpEvent = false; 1206 } 1207 } 1208 1209 public void beginBatchEdit() { 1210 mInBatchEditControllers = true; 1211 final InputMethodState ims = mInputMethodState; 1212 if (ims != null) { 1213 int nesting = ++ims.mBatchEditNesting; 1214 if (nesting == 1) { 1215 ims.mCursorChanged = false; 1216 ims.mChangedDelta = 0; 1217 if (ims.mContentChanged) { 1218 // We already have a pending change from somewhere else, 1219 // so turn this into a full update. 1220 ims.mChangedStart = 0; 1221 ims.mChangedEnd = mTextView.getText().length(); 1222 } else { 1223 ims.mChangedStart = EXTRACT_UNKNOWN; 1224 ims.mChangedEnd = EXTRACT_UNKNOWN; 1225 ims.mContentChanged = false; 1226 } 1227 mUndoInputFilter.beginBatchEdit(); 1228 mTextView.onBeginBatchEdit(); 1229 } 1230 } 1231 } 1232 1233 public void endBatchEdit() { 1234 mInBatchEditControllers = false; 1235 final InputMethodState ims = mInputMethodState; 1236 if (ims != null) { 1237 int nesting = --ims.mBatchEditNesting; 1238 if (nesting == 0) { 1239 finishBatchEdit(ims); 1240 } 1241 } 1242 } 1243 1244 void ensureEndedBatchEdit() { 1245 final InputMethodState ims = mInputMethodState; 1246 if (ims != null && ims.mBatchEditNesting != 0) { 1247 ims.mBatchEditNesting = 0; 1248 finishBatchEdit(ims); 1249 } 1250 } 1251 1252 void finishBatchEdit(final InputMethodState ims) { 1253 mTextView.onEndBatchEdit(); 1254 mUndoInputFilter.endBatchEdit(); 1255 1256 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1257 mTextView.updateAfterEdit(); 1258 reportExtractedText(); 1259 } else if (ims.mCursorChanged) { 1260 // Cheesy way to get us to report the current cursor location. 1261 mTextView.invalidateCursor(); 1262 } 1263 // sendUpdateSelection knows to avoid sending if the selection did 1264 // not actually change. 1265 sendUpdateSelection(); 1266 } 1267 1268 static final int EXTRACT_NOTHING = -2; 1269 static final int EXTRACT_UNKNOWN = -1; 1270 1271 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1272 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1273 EXTRACT_UNKNOWN, outText); 1274 } 1275 1276 private boolean extractTextInternal(ExtractedTextRequest request, 1277 int partialStartOffset, int partialEndOffset, int delta, 1278 ExtractedText outText) { 1279 final CharSequence content = mTextView.getText(); 1280 if (content != null) { 1281 if (partialStartOffset != EXTRACT_NOTHING) { 1282 final int N = content.length(); 1283 if (partialStartOffset < 0) { 1284 outText.partialStartOffset = outText.partialEndOffset = -1; 1285 partialStartOffset = 0; 1286 partialEndOffset = N; 1287 } else { 1288 // Now use the delta to determine the actual amount of text 1289 // we need. 1290 partialEndOffset += delta; 1291 // Adjust offsets to ensure we contain full spans. 1292 if (content instanceof Spanned) { 1293 Spanned spanned = (Spanned)content; 1294 Object[] spans = spanned.getSpans(partialStartOffset, 1295 partialEndOffset, ParcelableSpan.class); 1296 int i = spans.length; 1297 while (i > 0) { 1298 i--; 1299 int j = spanned.getSpanStart(spans[i]); 1300 if (j < partialStartOffset) partialStartOffset = j; 1301 j = spanned.getSpanEnd(spans[i]); 1302 if (j > partialEndOffset) partialEndOffset = j; 1303 } 1304 } 1305 outText.partialStartOffset = partialStartOffset; 1306 outText.partialEndOffset = partialEndOffset - delta; 1307 1308 if (partialStartOffset > N) { 1309 partialStartOffset = N; 1310 } else if (partialStartOffset < 0) { 1311 partialStartOffset = 0; 1312 } 1313 if (partialEndOffset > N) { 1314 partialEndOffset = N; 1315 } else if (partialEndOffset < 0) { 1316 partialEndOffset = 0; 1317 } 1318 } 1319 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1320 outText.text = content.subSequence(partialStartOffset, 1321 partialEndOffset); 1322 } else { 1323 outText.text = TextUtils.substring(content, partialStartOffset, 1324 partialEndOffset); 1325 } 1326 } else { 1327 outText.partialStartOffset = 0; 1328 outText.partialEndOffset = 0; 1329 outText.text = ""; 1330 } 1331 outText.flags = 0; 1332 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1333 outText.flags |= ExtractedText.FLAG_SELECTING; 1334 } 1335 if (mTextView.isSingleLine()) { 1336 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1337 } 1338 outText.startOffset = 0; 1339 outText.selectionStart = mTextView.getSelectionStart(); 1340 outText.selectionEnd = mTextView.getSelectionEnd(); 1341 return true; 1342 } 1343 return false; 1344 } 1345 1346 boolean reportExtractedText() { 1347 final Editor.InputMethodState ims = mInputMethodState; 1348 if (ims != null) { 1349 final boolean contentChanged = ims.mContentChanged; 1350 if (contentChanged || ims.mSelectionModeChanged) { 1351 ims.mContentChanged = false; 1352 ims.mSelectionModeChanged = false; 1353 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1354 if (req != null) { 1355 InputMethodManager imm = InputMethodManager.peekInstance(); 1356 if (imm != null) { 1357 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1358 "Retrieving extracted start=" + ims.mChangedStart + 1359 " end=" + ims.mChangedEnd + 1360 " delta=" + ims.mChangedDelta); 1361 if (ims.mChangedStart < 0 && !contentChanged) { 1362 ims.mChangedStart = EXTRACT_NOTHING; 1363 } 1364 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1365 ims.mChangedDelta, ims.mExtractedText)) { 1366 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1367 "Reporting extracted start=" + 1368 ims.mExtractedText.partialStartOffset + 1369 " end=" + ims.mExtractedText.partialEndOffset + 1370 ": " + ims.mExtractedText.text); 1371 1372 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1373 ims.mChangedStart = EXTRACT_UNKNOWN; 1374 ims.mChangedEnd = EXTRACT_UNKNOWN; 1375 ims.mChangedDelta = 0; 1376 ims.mContentChanged = false; 1377 return true; 1378 } 1379 } 1380 } 1381 } 1382 } 1383 return false; 1384 } 1385 1386 private void sendUpdateSelection() { 1387 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1388 final InputMethodManager imm = InputMethodManager.peekInstance(); 1389 if (null != imm) { 1390 final int selectionStart = mTextView.getSelectionStart(); 1391 final int selectionEnd = mTextView.getSelectionEnd(); 1392 int candStart = -1; 1393 int candEnd = -1; 1394 if (mTextView.getText() instanceof Spannable) { 1395 final Spannable sp = (Spannable) mTextView.getText(); 1396 candStart = EditableInputConnection.getComposingSpanStart(sp); 1397 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1398 } 1399 // InputMethodManager#updateSelection skips sending the message if 1400 // none of the parameters have changed since the last time we called it. 1401 imm.updateSelection(mTextView, 1402 selectionStart, selectionEnd, candStart, candEnd); 1403 } 1404 } 1405 } 1406 1407 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1408 int cursorOffsetVertical) { 1409 final int selectionStart = mTextView.getSelectionStart(); 1410 final int selectionEnd = mTextView.getSelectionEnd(); 1411 1412 final InputMethodState ims = mInputMethodState; 1413 if (ims != null && ims.mBatchEditNesting == 0) { 1414 InputMethodManager imm = InputMethodManager.peekInstance(); 1415 if (imm != null) { 1416 if (imm.isActive(mTextView)) { 1417 boolean reported = false; 1418 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1419 // We are in extract mode and the content has changed 1420 // in some way... just report complete new text to the 1421 // input method. 1422 reported = reportExtractedText(); 1423 } 1424 } 1425 } 1426 } 1427 1428 if (mCorrectionHighlighter != null) { 1429 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1430 } 1431 1432 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1433 drawCursor(canvas, cursorOffsetVertical); 1434 // Rely on the drawable entirely, do not draw the cursor line. 1435 // Has to be done after the IMM related code above which relies on the highlight. 1436 highlight = null; 1437 } 1438 1439 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1440 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1441 cursorOffsetVertical); 1442 } else { 1443 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1444 } 1445 } 1446 1447 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1448 Paint highlightPaint, int cursorOffsetVertical) { 1449 final long lineRange = layout.getLineRangeForDraw(canvas); 1450 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1451 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1452 if (lastLine < 0) return; 1453 1454 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1455 firstLine, lastLine); 1456 1457 if (layout instanceof DynamicLayout) { 1458 if (mTextDisplayLists == null) { 1459 mTextDisplayLists = ArrayUtils.emptyArray(TextDisplayList.class); 1460 } 1461 1462 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1463 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1464 int[] blockIndices = dynamicLayout.getBlockIndices(); 1465 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1466 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1467 1468 int endOfPreviousBlock = -1; 1469 int searchStartIndex = 0; 1470 for (int i = 0; i < numberOfBlocks; i++) { 1471 int blockEndLine = blockEndLines[i]; 1472 int blockIndex = blockIndices[i]; 1473 1474 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1475 if (blockIsInvalid) { 1476 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1477 searchStartIndex); 1478 // Note how dynamic layout's internal block indices get updated from Editor 1479 blockIndices[i] = blockIndex; 1480 if (mTextDisplayLists[blockIndex] != null) { 1481 mTextDisplayLists[blockIndex].isDirty = true; 1482 } 1483 searchStartIndex = blockIndex + 1; 1484 } 1485 1486 if (mTextDisplayLists[blockIndex] == null) { 1487 mTextDisplayLists[blockIndex] = 1488 new TextDisplayList("Text " + blockIndex); 1489 } 1490 1491 final boolean blockDisplayListIsInvalid = mTextDisplayLists[blockIndex].needsRecord(); 1492 RenderNode blockDisplayList = mTextDisplayLists[blockIndex].displayList; 1493 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1494 final int blockBeginLine = endOfPreviousBlock + 1; 1495 final int top = layout.getLineTop(blockBeginLine); 1496 final int bottom = layout.getLineBottom(blockEndLine); 1497 int left = 0; 1498 int right = mTextView.getWidth(); 1499 if (mTextView.getHorizontallyScrolling()) { 1500 float min = Float.MAX_VALUE; 1501 float max = Float.MIN_VALUE; 1502 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1503 min = Math.min(min, layout.getLineLeft(line)); 1504 max = Math.max(max, layout.getLineRight(line)); 1505 } 1506 left = (int) min; 1507 right = (int) (max + 0.5f); 1508 } 1509 1510 // Rebuild display list if it is invalid 1511 if (blockDisplayListIsInvalid) { 1512 final HardwareCanvas hardwareCanvas = blockDisplayList.start( 1513 right - left, bottom - top); 1514 try { 1515 // drawText is always relative to TextView's origin, this translation 1516 // brings this range of text back to the top left corner of the viewport 1517 hardwareCanvas.translate(-left, -top); 1518 layout.drawText(hardwareCanvas, blockBeginLine, blockEndLine); 1519 mTextDisplayLists[blockIndex].isDirty = false; 1520 // No need to untranslate, previous context is popped after 1521 // drawDisplayList 1522 } finally { 1523 blockDisplayList.end(hardwareCanvas); 1524 // Same as drawDisplayList below, handled by our TextView's parent 1525 blockDisplayList.setClipToBounds(false); 1526 } 1527 } 1528 1529 // Valid disply list whose index is >= indexFirstChangedBlock 1530 // only needs to update its drawing location. 1531 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1532 } 1533 1534 ((HardwareCanvas) canvas).drawRenderNode(blockDisplayList, 1535 0 /* no child clipping, our TextView parent enforces it */); 1536 1537 endOfPreviousBlock = blockEndLine; 1538 } 1539 1540 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1541 } else { 1542 // Boring layout is used for empty and hint text 1543 layout.drawText(canvas, firstLine, lastLine); 1544 } 1545 } 1546 1547 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1548 int searchStartIndex) { 1549 int length = mTextDisplayLists.length; 1550 for (int i = searchStartIndex; i < length; i++) { 1551 boolean blockIndexFound = false; 1552 for (int j = 0; j < numberOfBlocks; j++) { 1553 if (blockIndices[j] == i) { 1554 blockIndexFound = true; 1555 break; 1556 } 1557 } 1558 if (blockIndexFound) continue; 1559 return i; 1560 } 1561 1562 // No available index found, the pool has to grow 1563 mTextDisplayLists = GrowingArrayUtils.append(mTextDisplayLists, length, null); 1564 return length; 1565 } 1566 1567 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1568 final boolean translate = cursorOffsetVertical != 0; 1569 if (translate) canvas.translate(0, cursorOffsetVertical); 1570 for (int i = 0; i < mCursorCount; i++) { 1571 mCursorDrawable[i].draw(canvas); 1572 } 1573 if (translate) canvas.translate(0, -cursorOffsetVertical); 1574 } 1575 1576 /** 1577 * Invalidates all the sub-display lists that overlap the specified character range 1578 */ 1579 void invalidateTextDisplayList(Layout layout, int start, int end) { 1580 if (mTextDisplayLists != null && layout instanceof DynamicLayout) { 1581 final int firstLine = layout.getLineForOffset(start); 1582 final int lastLine = layout.getLineForOffset(end); 1583 1584 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1585 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1586 int[] blockIndices = dynamicLayout.getBlockIndices(); 1587 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1588 1589 int i = 0; 1590 // Skip the blocks before firstLine 1591 while (i < numberOfBlocks) { 1592 if (blockEndLines[i] >= firstLine) break; 1593 i++; 1594 } 1595 1596 // Invalidate all subsequent blocks until lastLine is passed 1597 while (i < numberOfBlocks) { 1598 final int blockIndex = blockIndices[i]; 1599 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1600 mTextDisplayLists[blockIndex].isDirty = true; 1601 } 1602 if (blockEndLines[i] >= lastLine) break; 1603 i++; 1604 } 1605 } 1606 } 1607 1608 void invalidateTextDisplayList() { 1609 if (mTextDisplayLists != null) { 1610 for (int i = 0; i < mTextDisplayLists.length; i++) { 1611 if (mTextDisplayLists[i] != null) mTextDisplayLists[i].isDirty = true; 1612 } 1613 } 1614 } 1615 1616 void updateCursorsPositions() { 1617 if (mTextView.mCursorDrawableRes == 0) { 1618 mCursorCount = 0; 1619 return; 1620 } 1621 1622 Layout layout = mTextView.getLayout(); 1623 Layout hintLayout = mTextView.getHintLayout(); 1624 final int offset = mTextView.getSelectionStart(); 1625 final int line = layout.getLineForOffset(offset); 1626 final int top = layout.getLineTop(line); 1627 final int bottom = layout.getLineTop(line + 1); 1628 1629 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1630 1631 int middle = bottom; 1632 if (mCursorCount == 2) { 1633 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1634 middle = (top + bottom) >> 1; 1635 } 1636 1637 boolean clamped = layout.shouldClampCursor(line); 1638 updateCursorPosition(0, top, middle, 1639 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1640 1641 if (mCursorCount == 2) { 1642 updateCursorPosition(1, middle, bottom, 1643 layout.getSecondaryHorizontal(offset, clamped)); 1644 } 1645 } 1646 1647 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1648 boolean clamped) { 1649 if (TextUtils.isEmpty(layout.getText()) && 1650 hintLayout != null && 1651 !TextUtils.isEmpty(hintLayout.getText())) { 1652 return hintLayout.getPrimaryHorizontal(offset, clamped); 1653 } else { 1654 return layout.getPrimaryHorizontal(offset, clamped); 1655 } 1656 } 1657 1658 /** 1659 * @return true if the selection mode was actually started. 1660 */ 1661 private boolean startSelectionActionModeWithoutSelection() { 1662 if (mSelectionActionMode != null) { 1663 // Selection action mode is already started 1664 // TODO: revisit invocations to minimize this case. 1665 return false; 1666 } 1667 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1668 mSelectionActionMode = mTextView.startActionMode(actionModeCallback); 1669 return mSelectionActionMode != null; 1670 } 1671 1672 /** 1673 * @return true if the selection mode was actually started. 1674 */ 1675 boolean startSelectionActionModeWithSelection() { 1676 if (mSelectionActionMode != null) { 1677 // Selection action mode is already started 1678 return false; 1679 } 1680 1681 if (!canSelectText() || !mTextView.requestFocus()) { 1682 Log.w(TextView.LOG_TAG, 1683 "TextView does not support text selection. Action mode cancelled."); 1684 return false; 1685 } 1686 1687 if (!mTextView.hasSelection()) { 1688 // There may already be a selection on device rotation 1689 if (!selectCurrentWord()) { 1690 // No word found under cursor or text selection not permitted. 1691 return false; 1692 } 1693 } 1694 1695 boolean willExtract = extractedTextModeWillBeStarted(); 1696 1697 // Do not start the action mode when extracted text will show up full screen, which would 1698 // immediately hide the newly created action bar and would be visually distracting. 1699 if (!willExtract) { 1700 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1701 mSelectionActionMode = mTextView.startActionMode(actionModeCallback); 1702 } 1703 1704 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1705 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1706 // Show the IME to be able to replace text, except when selecting non editable text. 1707 final InputMethodManager imm = InputMethodManager.peekInstance(); 1708 if (imm != null) { 1709 imm.showSoftInput(mTextView, 0, null); 1710 } 1711 } 1712 1713 if (selectionStarted) { 1714 getSelectionController().enterDrag(); 1715 } 1716 return selectionStarted; 1717 } 1718 1719 private boolean extractedTextModeWillBeStarted() { 1720 if (!(mTextView instanceof ExtractEditText)) { 1721 final InputMethodManager imm = InputMethodManager.peekInstance(); 1722 return imm != null && imm.isFullscreenMode(); 1723 } 1724 return false; 1725 } 1726 1727 /** 1728 * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}. 1729 */ 1730 private boolean isCursorInsideSuggestionSpan() { 1731 CharSequence text = mTextView.getText(); 1732 if (!(text instanceof Spannable)) return false; 1733 1734 SuggestionSpan[] suggestionSpans = ((Spannable) text).getSpans( 1735 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), SuggestionSpan.class); 1736 return (suggestionSpans.length > 0); 1737 } 1738 1739 /** 1740 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1741 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1742 */ 1743 private boolean isCursorInsideEasyCorrectionSpan() { 1744 Spannable spannable = (Spannable) mTextView.getText(); 1745 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1746 mTextView.getSelectionEnd(), SuggestionSpan.class); 1747 for (int i = 0; i < suggestionSpans.length; i++) { 1748 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1749 return true; 1750 } 1751 } 1752 return false; 1753 } 1754 1755 void onTouchUpEvent(MotionEvent event) { 1756 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1757 hideControllers(); 1758 CharSequence text = mTextView.getText(); 1759 if (!selectAllGotFocus && text.length() > 0) { 1760 // Move cursor 1761 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1762 Selection.setSelection((Spannable) text, offset); 1763 if (mSpellChecker != null) { 1764 // When the cursor moves, the word that was typed may need spell check 1765 mSpellChecker.onSelectionChanged(); 1766 } 1767 if (!extractedTextModeWillBeStarted()) { 1768 if (isCursorInsideEasyCorrectionSpan()) { 1769 mShowSuggestionRunnable = new Runnable() { 1770 public void run() { 1771 showSuggestions(); 1772 } 1773 }; 1774 // removeCallbacks is performed on every touch 1775 mTextView.postDelayed(mShowSuggestionRunnable, 1776 ViewConfiguration.getDoubleTapTimeout()); 1777 } else if (hasInsertionController()) { 1778 getInsertionController().show(); 1779 } 1780 } 1781 } 1782 } 1783 1784 protected void stopSelectionActionMode() { 1785 if (mSelectionActionMode != null) { 1786 // This will hide the mSelectionModifierCursorController 1787 mSelectionActionMode.finish(); 1788 } 1789 } 1790 1791 /** 1792 * @return True if this view supports insertion handles. 1793 */ 1794 boolean hasInsertionController() { 1795 return mInsertionControllerEnabled; 1796 } 1797 1798 /** 1799 * @return True if this view supports selection handles. 1800 */ 1801 boolean hasSelectionController() { 1802 return mSelectionControllerEnabled; 1803 } 1804 1805 InsertionPointCursorController getInsertionController() { 1806 if (!mInsertionControllerEnabled) { 1807 return null; 1808 } 1809 1810 if (mInsertionPointCursorController == null) { 1811 mInsertionPointCursorController = new InsertionPointCursorController(); 1812 1813 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1814 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1815 } 1816 1817 return mInsertionPointCursorController; 1818 } 1819 1820 SelectionModifierCursorController getSelectionController() { 1821 if (!mSelectionControllerEnabled) { 1822 return null; 1823 } 1824 1825 if (mSelectionModifierCursorController == null) { 1826 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1827 1828 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1829 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1830 } 1831 1832 return mSelectionModifierCursorController; 1833 } 1834 1835 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1836 if (mCursorDrawable[cursorIndex] == null) 1837 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1838 mTextView.mCursorDrawableRes); 1839 1840 if (mTempRect == null) mTempRect = new Rect(); 1841 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1842 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1843 horizontal = Math.max(0.5f, horizontal - 0.5f); 1844 final int left = (int) (horizontal) - mTempRect.left; 1845 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1846 bottom + mTempRect.bottom); 1847 } 1848 1849 /** 1850 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1851 * a dictionary) from the current input method, provided by it calling 1852 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1853 * implementation flashes the background of the corrected word to provide feedback to the user. 1854 * 1855 * @param info The auto correct info about the text that was corrected. 1856 */ 1857 public void onCommitCorrection(CorrectionInfo info) { 1858 if (mCorrectionHighlighter == null) { 1859 mCorrectionHighlighter = new CorrectionHighlighter(); 1860 } else { 1861 mCorrectionHighlighter.invalidate(false); 1862 } 1863 1864 mCorrectionHighlighter.highlight(info); 1865 } 1866 1867 void showSuggestions() { 1868 if (mSuggestionsPopupWindow == null) { 1869 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1870 } 1871 hideControllers(); 1872 mSuggestionsPopupWindow.show(); 1873 } 1874 1875 boolean areSuggestionsShown() { 1876 return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing(); 1877 } 1878 1879 void onScrollChanged() { 1880 if (mPositionListener != null) { 1881 mPositionListener.onScrollChanged(); 1882 } 1883 } 1884 1885 /** 1886 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1887 */ 1888 private boolean shouldBlink() { 1889 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1890 1891 final int start = mTextView.getSelectionStart(); 1892 if (start < 0) return false; 1893 1894 final int end = mTextView.getSelectionEnd(); 1895 if (end < 0) return false; 1896 1897 return start == end; 1898 } 1899 1900 void makeBlink() { 1901 if (shouldBlink()) { 1902 mShowCursor = SystemClock.uptimeMillis(); 1903 if (mBlink == null) mBlink = new Blink(); 1904 mBlink.removeCallbacks(mBlink); 1905 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 1906 } else { 1907 if (mBlink != null) mBlink.removeCallbacks(mBlink); 1908 } 1909 } 1910 1911 private class Blink extends Handler implements Runnable { 1912 private boolean mCancelled; 1913 1914 public void run() { 1915 if (mCancelled) { 1916 return; 1917 } 1918 1919 removeCallbacks(Blink.this); 1920 1921 if (shouldBlink()) { 1922 if (mTextView.getLayout() != null) { 1923 mTextView.invalidateCursorPath(); 1924 } 1925 1926 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 1927 } 1928 } 1929 1930 void cancel() { 1931 if (!mCancelled) { 1932 removeCallbacks(Blink.this); 1933 mCancelled = true; 1934 } 1935 } 1936 1937 void uncancel() { 1938 mCancelled = false; 1939 } 1940 } 1941 1942 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 1943 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 1944 com.android.internal.R.layout.text_drag_thumbnail, null); 1945 1946 if (shadowView == null) { 1947 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 1948 } 1949 1950 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 1951 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 1952 } 1953 shadowView.setText(text); 1954 shadowView.setTextColor(mTextView.getTextColors()); 1955 1956 shadowView.setTextAppearance(mTextView.getContext(), R.styleable.Theme_textAppearanceLarge); 1957 shadowView.setGravity(Gravity.CENTER); 1958 1959 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 1960 ViewGroup.LayoutParams.WRAP_CONTENT)); 1961 1962 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 1963 shadowView.measure(size, size); 1964 1965 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 1966 shadowView.invalidate(); 1967 return new DragShadowBuilder(shadowView); 1968 } 1969 1970 private static class DragLocalState { 1971 public TextView sourceTextView; 1972 public int start, end; 1973 1974 public DragLocalState(TextView sourceTextView, int start, int end) { 1975 this.sourceTextView = sourceTextView; 1976 this.start = start; 1977 this.end = end; 1978 } 1979 } 1980 1981 void onDrop(DragEvent event) { 1982 StringBuilder content = new StringBuilder(""); 1983 ClipData clipData = event.getClipData(); 1984 final int itemCount = clipData.getItemCount(); 1985 for (int i=0; i < itemCount; i++) { 1986 Item item = clipData.getItemAt(i); 1987 content.append(item.coerceToStyledText(mTextView.getContext())); 1988 } 1989 1990 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1991 1992 Object localState = event.getLocalState(); 1993 DragLocalState dragLocalState = null; 1994 if (localState instanceof DragLocalState) { 1995 dragLocalState = (DragLocalState) localState; 1996 } 1997 boolean dragDropIntoItself = dragLocalState != null && 1998 dragLocalState.sourceTextView == mTextView; 1999 2000 if (dragDropIntoItself) { 2001 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2002 // A drop inside the original selection discards the drop. 2003 return; 2004 } 2005 } 2006 2007 final int originalLength = mTextView.getText().length(); 2008 int min = offset; 2009 int max = offset; 2010 2011 Selection.setSelection((Spannable) mTextView.getText(), max); 2012 mTextView.replaceText_internal(min, max, content); 2013 2014 if (dragDropIntoItself) { 2015 int dragSourceStart = dragLocalState.start; 2016 int dragSourceEnd = dragLocalState.end; 2017 if (max <= dragSourceStart) { 2018 // Inserting text before selection has shifted positions 2019 final int shift = mTextView.getText().length() - originalLength; 2020 dragSourceStart += shift; 2021 dragSourceEnd += shift; 2022 } 2023 2024 // Delete original selection 2025 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2026 2027 // Make sure we do not leave two adjacent spaces. 2028 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2029 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2030 if (nextCharIdx > prevCharIdx + 1) { 2031 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2032 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2033 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2034 } 2035 } 2036 } 2037 } 2038 2039 public void addSpanWatchers(Spannable text) { 2040 final int textLength = text.length(); 2041 2042 if (mKeyListener != null) { 2043 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2044 } 2045 2046 if (mSpanController == null) { 2047 mSpanController = new SpanController(); 2048 } 2049 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2050 } 2051 2052 /** 2053 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2054 * pop-up should be displayed. 2055 * Also monitors {@link Selection} to call back to the attached input method. 2056 */ 2057 class SpanController implements SpanWatcher { 2058 2059 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2060 2061 private EasyEditPopupWindow mPopupWindow; 2062 2063 private Runnable mHidePopup; 2064 2065 // This function is pure but inner classes can't have static functions 2066 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2067 final Object span) { 2068 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2069 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2070 } 2071 2072 @Override 2073 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2074 if (isNonIntermediateSelectionSpan(text, span)) { 2075 sendUpdateSelection(); 2076 } else if (span instanceof EasyEditSpan) { 2077 if (mPopupWindow == null) { 2078 mPopupWindow = new EasyEditPopupWindow(); 2079 mHidePopup = new Runnable() { 2080 @Override 2081 public void run() { 2082 hide(); 2083 } 2084 }; 2085 } 2086 2087 // Make sure there is only at most one EasyEditSpan in the text 2088 if (mPopupWindow.mEasyEditSpan != null) { 2089 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2090 } 2091 2092 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2093 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2094 @Override 2095 public void onDeleteClick(EasyEditSpan span) { 2096 Editable editable = (Editable) mTextView.getText(); 2097 int start = editable.getSpanStart(span); 2098 int end = editable.getSpanEnd(span); 2099 if (start >= 0 && end >= 0) { 2100 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2101 mTextView.deleteText_internal(start, end); 2102 } 2103 editable.removeSpan(span); 2104 } 2105 }); 2106 2107 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2108 // The window is not visible yet, ignore the text change. 2109 return; 2110 } 2111 2112 if (mTextView.getLayout() == null) { 2113 // The view has not been laid out yet, ignore the text change 2114 return; 2115 } 2116 2117 if (extractedTextModeWillBeStarted()) { 2118 // The input is in extract mode. Do not handle the easy edit in 2119 // the original TextView, as the ExtractEditText will do 2120 return; 2121 } 2122 2123 mPopupWindow.show(); 2124 mTextView.removeCallbacks(mHidePopup); 2125 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2126 } 2127 } 2128 2129 @Override 2130 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2131 if (isNonIntermediateSelectionSpan(text, span)) { 2132 sendUpdateSelection(); 2133 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2134 hide(); 2135 } 2136 } 2137 2138 @Override 2139 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2140 int newStart, int newEnd) { 2141 if (isNonIntermediateSelectionSpan(text, span)) { 2142 sendUpdateSelection(); 2143 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2144 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2145 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2146 text.removeSpan(easyEditSpan); 2147 } 2148 } 2149 2150 public void hide() { 2151 if (mPopupWindow != null) { 2152 mPopupWindow.hide(); 2153 mTextView.removeCallbacks(mHidePopup); 2154 } 2155 } 2156 2157 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2158 try { 2159 PendingIntent pendingIntent = span.getPendingIntent(); 2160 if (pendingIntent != null) { 2161 Intent intent = new Intent(); 2162 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2163 pendingIntent.send(mTextView.getContext(), 0, intent); 2164 } 2165 } catch (CanceledException e) { 2166 // This should not happen, as we should try to send the intent only once. 2167 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2168 } 2169 } 2170 } 2171 2172 /** 2173 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2174 */ 2175 private interface EasyEditDeleteListener { 2176 2177 /** 2178 * Clicks the delete pop-up. 2179 */ 2180 void onDeleteClick(EasyEditSpan span); 2181 } 2182 2183 /** 2184 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2185 * by {@link SpanController}. 2186 */ 2187 private class EasyEditPopupWindow extends PinnedPopupWindow 2188 implements OnClickListener { 2189 private static final int POPUP_TEXT_LAYOUT = 2190 com.android.internal.R.layout.text_edit_action_popup_text; 2191 private TextView mDeleteTextView; 2192 private EasyEditSpan mEasyEditSpan; 2193 private EasyEditDeleteListener mOnDeleteListener; 2194 2195 @Override 2196 protected void createPopupWindow() { 2197 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2198 com.android.internal.R.attr.textSelectHandleWindowStyle); 2199 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2200 mPopupWindow.setClippingEnabled(true); 2201 } 2202 2203 @Override 2204 protected void initContentView() { 2205 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2206 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2207 mContentView = linearLayout; 2208 mContentView.setBackgroundResource( 2209 com.android.internal.R.drawable.text_edit_side_paste_window); 2210 2211 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2212 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2213 2214 LayoutParams wrapContent = new LayoutParams( 2215 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2216 2217 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2218 mDeleteTextView.setLayoutParams(wrapContent); 2219 mDeleteTextView.setText(com.android.internal.R.string.delete); 2220 mDeleteTextView.setOnClickListener(this); 2221 mContentView.addView(mDeleteTextView); 2222 } 2223 2224 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2225 mEasyEditSpan = easyEditSpan; 2226 } 2227 2228 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2229 mOnDeleteListener = listener; 2230 } 2231 2232 @Override 2233 public void onClick(View view) { 2234 if (view == mDeleteTextView 2235 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2236 && mOnDeleteListener != null) { 2237 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2238 } 2239 } 2240 2241 @Override 2242 public void hide() { 2243 if (mEasyEditSpan != null) { 2244 mEasyEditSpan.setDeleteEnabled(false); 2245 } 2246 mOnDeleteListener = null; 2247 super.hide(); 2248 } 2249 2250 @Override 2251 protected int getTextOffset() { 2252 // Place the pop-up at the end of the span 2253 Editable editable = (Editable) mTextView.getText(); 2254 return editable.getSpanEnd(mEasyEditSpan); 2255 } 2256 2257 @Override 2258 protected int getVerticalLocalPosition(int line) { 2259 return mTextView.getLayout().getLineBottom(line); 2260 } 2261 2262 @Override 2263 protected int clipVertically(int positionY) { 2264 // As we display the pop-up below the span, no vertical clipping is required. 2265 return positionY; 2266 } 2267 } 2268 2269 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2270 // 3 handles 2271 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2272 // 1 CursorAnchorInfoNotifier 2273 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2274 private TextViewPositionListener[] mPositionListeners = 2275 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2276 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2277 private boolean mPositionHasChanged = true; 2278 // Absolute position of the TextView with respect to its parent window 2279 private int mPositionX, mPositionY; 2280 private int mNumberOfListeners; 2281 private boolean mScrollHasChanged; 2282 final int[] mTempCoords = new int[2]; 2283 2284 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2285 if (mNumberOfListeners == 0) { 2286 updatePosition(); 2287 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2288 vto.addOnPreDrawListener(this); 2289 } 2290 2291 int emptySlotIndex = -1; 2292 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2293 TextViewPositionListener listener = mPositionListeners[i]; 2294 if (listener == positionListener) { 2295 return; 2296 } else if (emptySlotIndex < 0 && listener == null) { 2297 emptySlotIndex = i; 2298 } 2299 } 2300 2301 mPositionListeners[emptySlotIndex] = positionListener; 2302 mCanMove[emptySlotIndex] = canMove; 2303 mNumberOfListeners++; 2304 } 2305 2306 public void removeSubscriber(TextViewPositionListener positionListener) { 2307 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2308 if (mPositionListeners[i] == positionListener) { 2309 mPositionListeners[i] = null; 2310 mNumberOfListeners--; 2311 break; 2312 } 2313 } 2314 2315 if (mNumberOfListeners == 0) { 2316 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2317 vto.removeOnPreDrawListener(this); 2318 } 2319 } 2320 2321 public int getPositionX() { 2322 return mPositionX; 2323 } 2324 2325 public int getPositionY() { 2326 return mPositionY; 2327 } 2328 2329 @Override 2330 public boolean onPreDraw() { 2331 updatePosition(); 2332 2333 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2334 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2335 TextViewPositionListener positionListener = mPositionListeners[i]; 2336 if (positionListener != null) { 2337 positionListener.updatePosition(mPositionX, mPositionY, 2338 mPositionHasChanged, mScrollHasChanged); 2339 } 2340 } 2341 } 2342 2343 mScrollHasChanged = false; 2344 return true; 2345 } 2346 2347 private void updatePosition() { 2348 mTextView.getLocationInWindow(mTempCoords); 2349 2350 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2351 2352 mPositionX = mTempCoords[0]; 2353 mPositionY = mTempCoords[1]; 2354 } 2355 2356 public void onScrollChanged() { 2357 mScrollHasChanged = true; 2358 } 2359 } 2360 2361 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2362 protected PopupWindow mPopupWindow; 2363 protected ViewGroup mContentView; 2364 int mPositionX, mPositionY; 2365 2366 protected abstract void createPopupWindow(); 2367 protected abstract void initContentView(); 2368 protected abstract int getTextOffset(); 2369 protected abstract int getVerticalLocalPosition(int line); 2370 protected abstract int clipVertically(int positionY); 2371 2372 public PinnedPopupWindow() { 2373 createPopupWindow(); 2374 2375 mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 2376 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2377 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2378 2379 initContentView(); 2380 2381 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2382 ViewGroup.LayoutParams.WRAP_CONTENT); 2383 mContentView.setLayoutParams(wrapContent); 2384 2385 mPopupWindow.setContentView(mContentView); 2386 } 2387 2388 public void show() { 2389 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2390 2391 computeLocalPosition(); 2392 2393 final PositionListener positionListener = getPositionListener(); 2394 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2395 } 2396 2397 protected void measureContent() { 2398 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2399 mContentView.measure( 2400 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2401 View.MeasureSpec.AT_MOST), 2402 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2403 View.MeasureSpec.AT_MOST)); 2404 } 2405 2406 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2407 * positioned according to viewportToContentHorizontalOffset. 2408 * 2409 * This method assumes that mContentView has properly been measured from its content. */ 2410 private void computeLocalPosition() { 2411 measureContent(); 2412 final int width = mContentView.getMeasuredWidth(); 2413 final int offset = getTextOffset(); 2414 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2415 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2416 2417 final int line = mTextView.getLayout().getLineForOffset(offset); 2418 mPositionY = getVerticalLocalPosition(line); 2419 mPositionY += mTextView.viewportToContentVerticalOffset(); 2420 } 2421 2422 private void updatePosition(int parentPositionX, int parentPositionY) { 2423 int positionX = parentPositionX + mPositionX; 2424 int positionY = parentPositionY + mPositionY; 2425 2426 positionY = clipVertically(positionY); 2427 2428 // Horizontal clipping 2429 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2430 final int width = mContentView.getMeasuredWidth(); 2431 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2432 positionX = Math.max(0, positionX); 2433 2434 if (isShowing()) { 2435 mPopupWindow.update(positionX, positionY, -1, -1); 2436 } else { 2437 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2438 positionX, positionY); 2439 } 2440 } 2441 2442 public void hide() { 2443 mPopupWindow.dismiss(); 2444 getPositionListener().removeSubscriber(this); 2445 } 2446 2447 @Override 2448 public void updatePosition(int parentPositionX, int parentPositionY, 2449 boolean parentPositionChanged, boolean parentScrolled) { 2450 // Either parentPositionChanged or parentScrolled is true, check if still visible 2451 if (isShowing() && isOffsetVisible(getTextOffset())) { 2452 if (parentScrolled) computeLocalPosition(); 2453 updatePosition(parentPositionX, parentPositionY); 2454 } else { 2455 hide(); 2456 } 2457 } 2458 2459 public boolean isShowing() { 2460 return mPopupWindow.isShowing(); 2461 } 2462 } 2463 2464 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2465 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2466 private static final int ADD_TO_DICTIONARY = -1; 2467 private static final int DELETE_TEXT = -2; 2468 private SuggestionInfo[] mSuggestionInfos; 2469 private int mNumberOfSuggestions; 2470 private boolean mCursorWasVisibleBeforeSuggestions; 2471 private boolean mIsShowingUp = false; 2472 private SuggestionAdapter mSuggestionsAdapter; 2473 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2474 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2475 2476 private class CustomPopupWindow extends PopupWindow { 2477 public CustomPopupWindow(Context context, int defStyleAttr) { 2478 super(context, null, defStyleAttr); 2479 } 2480 2481 @Override 2482 public void dismiss() { 2483 super.dismiss(); 2484 2485 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2486 2487 // Safe cast since show() checks that mTextView.getText() is an Editable 2488 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2489 2490 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2491 if (hasInsertionController()) { 2492 getInsertionController().show(); 2493 } 2494 } 2495 } 2496 2497 public SuggestionsPopupWindow() { 2498 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2499 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2500 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2501 } 2502 2503 @Override 2504 protected void createPopupWindow() { 2505 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2506 com.android.internal.R.attr.textSuggestionsWindowStyle); 2507 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2508 mPopupWindow.setFocusable(true); 2509 mPopupWindow.setClippingEnabled(false); 2510 } 2511 2512 @Override 2513 protected void initContentView() { 2514 ListView listView = new ListView(mTextView.getContext()); 2515 mSuggestionsAdapter = new SuggestionAdapter(); 2516 listView.setAdapter(mSuggestionsAdapter); 2517 listView.setOnItemClickListener(this); 2518 mContentView = listView; 2519 2520 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2521 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2522 for (int i = 0; i < mSuggestionInfos.length; i++) { 2523 mSuggestionInfos[i] = new SuggestionInfo(); 2524 } 2525 } 2526 2527 public boolean isShowingUp() { 2528 return mIsShowingUp; 2529 } 2530 2531 public void onParentLostFocus() { 2532 mIsShowingUp = false; 2533 } 2534 2535 private class SuggestionInfo { 2536 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2537 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2538 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2539 SpannableStringBuilder text = new SpannableStringBuilder(); 2540 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2541 android.R.style.TextAppearance_SuggestionHighlight); 2542 } 2543 2544 private class SuggestionAdapter extends BaseAdapter { 2545 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2546 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2547 2548 @Override 2549 public int getCount() { 2550 return mNumberOfSuggestions; 2551 } 2552 2553 @Override 2554 public Object getItem(int position) { 2555 return mSuggestionInfos[position]; 2556 } 2557 2558 @Override 2559 public long getItemId(int position) { 2560 return position; 2561 } 2562 2563 @Override 2564 public View getView(int position, View convertView, ViewGroup parent) { 2565 TextView textView = (TextView) convertView; 2566 2567 if (textView == null) { 2568 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2569 parent, false); 2570 } 2571 2572 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2573 textView.setText(suggestionInfo.text); 2574 2575 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2576 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2577 textView.setBackgroundColor(Color.TRANSPARENT); 2578 } else { 2579 textView.setBackgroundColor(Color.WHITE); 2580 } 2581 2582 return textView; 2583 } 2584 } 2585 2586 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2587 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2588 final int flag1 = span1.getFlags(); 2589 final int flag2 = span2.getFlags(); 2590 if (flag1 != flag2) { 2591 // The order here should match what is used in updateDrawState 2592 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2593 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2594 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2595 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2596 if (easy1 && !misspelled1) return -1; 2597 if (easy2 && !misspelled2) return 1; 2598 if (misspelled1) return -1; 2599 if (misspelled2) return 1; 2600 } 2601 2602 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2603 } 2604 } 2605 2606 /** 2607 * Returns the suggestion spans that cover the current cursor position. The suggestion 2608 * spans are sorted according to the length of text that they are attached to. 2609 */ 2610 private SuggestionSpan[] getSuggestionSpans() { 2611 int pos = mTextView.getSelectionStart(); 2612 Spannable spannable = (Spannable) mTextView.getText(); 2613 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2614 2615 mSpansLengths.clear(); 2616 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2617 int start = spannable.getSpanStart(suggestionSpan); 2618 int end = spannable.getSpanEnd(suggestionSpan); 2619 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2620 } 2621 2622 // The suggestions are sorted according to their types (easy correction first, then 2623 // misspelled) and to the length of the text that they cover (shorter first). 2624 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2625 return suggestionSpans; 2626 } 2627 2628 @Override 2629 public void show() { 2630 if (!(mTextView.getText() instanceof Editable)) return; 2631 2632 if (updateSuggestions()) { 2633 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2634 mTextView.setCursorVisible(false); 2635 mIsShowingUp = true; 2636 super.show(); 2637 } 2638 } 2639 2640 @Override 2641 protected void measureContent() { 2642 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2643 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2644 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2645 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2646 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2647 2648 int width = 0; 2649 View view = null; 2650 for (int i = 0; i < mNumberOfSuggestions; i++) { 2651 view = mSuggestionsAdapter.getView(i, view, mContentView); 2652 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2653 view.measure(horizontalMeasure, verticalMeasure); 2654 width = Math.max(width, view.getMeasuredWidth()); 2655 } 2656 2657 // Enforce the width based on actual text widths 2658 mContentView.measure( 2659 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2660 verticalMeasure); 2661 2662 Drawable popupBackground = mPopupWindow.getBackground(); 2663 if (popupBackground != null) { 2664 if (mTempRect == null) mTempRect = new Rect(); 2665 popupBackground.getPadding(mTempRect); 2666 width += mTempRect.left + mTempRect.right; 2667 } 2668 mPopupWindow.setWidth(width); 2669 } 2670 2671 @Override 2672 protected int getTextOffset() { 2673 return mTextView.getSelectionStart(); 2674 } 2675 2676 @Override 2677 protected int getVerticalLocalPosition(int line) { 2678 return mTextView.getLayout().getLineBottom(line); 2679 } 2680 2681 @Override 2682 protected int clipVertically(int positionY) { 2683 final int height = mContentView.getMeasuredHeight(); 2684 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2685 return Math.min(positionY, displayMetrics.heightPixels - height); 2686 } 2687 2688 @Override 2689 public void hide() { 2690 super.hide(); 2691 } 2692 2693 private boolean updateSuggestions() { 2694 Spannable spannable = (Spannable) mTextView.getText(); 2695 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2696 2697 final int nbSpans = suggestionSpans.length; 2698 // Suggestions are shown after a delay: the underlying spans may have been removed 2699 if (nbSpans == 0) return false; 2700 2701 mNumberOfSuggestions = 0; 2702 int spanUnionStart = mTextView.getText().length(); 2703 int spanUnionEnd = 0; 2704 2705 SuggestionSpan misspelledSpan = null; 2706 int underlineColor = 0; 2707 2708 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2709 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2710 final int spanStart = spannable.getSpanStart(suggestionSpan); 2711 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2712 spanUnionStart = Math.min(spanStart, spanUnionStart); 2713 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2714 2715 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2716 misspelledSpan = suggestionSpan; 2717 } 2718 2719 // The first span dictates the background color of the highlighted text 2720 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2721 2722 String[] suggestions = suggestionSpan.getSuggestions(); 2723 int nbSuggestions = suggestions.length; 2724 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2725 String suggestion = suggestions[suggestionIndex]; 2726 2727 boolean suggestionIsDuplicate = false; 2728 for (int i = 0; i < mNumberOfSuggestions; i++) { 2729 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2730 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2731 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2732 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2733 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2734 suggestionIsDuplicate = true; 2735 break; 2736 } 2737 } 2738 } 2739 2740 if (!suggestionIsDuplicate) { 2741 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2742 suggestionInfo.suggestionSpan = suggestionSpan; 2743 suggestionInfo.suggestionIndex = suggestionIndex; 2744 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2745 2746 mNumberOfSuggestions++; 2747 2748 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2749 // Also end outer for loop 2750 spanIndex = nbSpans; 2751 break; 2752 } 2753 } 2754 } 2755 } 2756 2757 for (int i = 0; i < mNumberOfSuggestions; i++) { 2758 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2759 } 2760 2761 // Add "Add to dictionary" item if there is a span with the misspelled flag 2762 if (misspelledSpan != null) { 2763 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2764 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2765 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2766 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2767 suggestionInfo.suggestionSpan = misspelledSpan; 2768 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2769 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2770 getContext().getString(com.android.internal.R.string.addToDictionary)); 2771 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2772 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2773 2774 mNumberOfSuggestions++; 2775 } 2776 } 2777 2778 // Delete item 2779 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2780 suggestionInfo.suggestionSpan = null; 2781 suggestionInfo.suggestionIndex = DELETE_TEXT; 2782 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2783 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2784 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2785 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2786 mNumberOfSuggestions++; 2787 2788 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2789 if (underlineColor == 0) { 2790 // Fallback on the default highlight color when the first span does not provide one 2791 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2792 } else { 2793 final float BACKGROUND_TRANSPARENCY = 0.4f; 2794 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2795 mSuggestionRangeSpan.setBackgroundColor( 2796 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2797 } 2798 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2799 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2800 2801 mSuggestionsAdapter.notifyDataSetChanged(); 2802 return true; 2803 } 2804 2805 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2806 int unionEnd) { 2807 final Spannable text = (Spannable) mTextView.getText(); 2808 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2809 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2810 2811 // Adjust the start/end of the suggestion span 2812 suggestionInfo.suggestionStart = spanStart - unionStart; 2813 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2814 + suggestionInfo.text.length(); 2815 2816 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2817 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2818 2819 // Add the text before and after the span. 2820 final String textAsString = text.toString(); 2821 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2822 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2823 } 2824 2825 @Override 2826 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2827 Editable editable = (Editable) mTextView.getText(); 2828 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2829 2830 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2831 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2832 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2833 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2834 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2835 if (spanUnionEnd < editable.length() && 2836 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2837 (spanUnionStart == 0 || 2838 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2839 spanUnionEnd = spanUnionEnd + 1; 2840 } 2841 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2842 } 2843 hide(); 2844 return; 2845 } 2846 2847 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2848 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2849 if (spanStart < 0 || spanEnd <= spanStart) { 2850 // Span has been removed 2851 hide(); 2852 return; 2853 } 2854 2855 final String originalText = editable.toString().substring(spanStart, spanEnd); 2856 2857 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2858 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2859 intent.putExtra("word", originalText); 2860 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2861 // Put a listener to replace the original text with a word which the user 2862 // modified in a user dictionary dialog. 2863 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2864 mTextView.getContext().startActivity(intent); 2865 // There is no way to know if the word was indeed added. Re-check. 2866 // TODO The ExtractEditText should remove the span in the original text instead 2867 editable.removeSpan(suggestionInfo.suggestionSpan); 2868 Selection.setSelection(editable, spanEnd); 2869 updateSpellCheckSpans(spanStart, spanEnd, false); 2870 } else { 2871 // SuggestionSpans are removed by replace: save them before 2872 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2873 SuggestionSpan.class); 2874 final int length = suggestionSpans.length; 2875 int[] suggestionSpansStarts = new int[length]; 2876 int[] suggestionSpansEnds = new int[length]; 2877 int[] suggestionSpansFlags = new int[length]; 2878 for (int i = 0; i < length; i++) { 2879 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2880 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2881 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2882 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2883 2884 // Remove potential misspelled flags 2885 int suggestionSpanFlags = suggestionSpan.getFlags(); 2886 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2887 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2888 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2889 suggestionSpan.setFlags(suggestionSpanFlags); 2890 } 2891 } 2892 2893 final int suggestionStart = suggestionInfo.suggestionStart; 2894 final int suggestionEnd = suggestionInfo.suggestionEnd; 2895 final String suggestion = suggestionInfo.text.subSequence( 2896 suggestionStart, suggestionEnd).toString(); 2897 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2898 2899 // Notify source IME of the suggestion pick. Do this before 2900 // swaping texts. 2901 suggestionInfo.suggestionSpan.notifySelection( 2902 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 2903 2904 // Swap text content between actual text and Suggestion span 2905 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 2906 suggestions[suggestionInfo.suggestionIndex] = originalText; 2907 2908 // Restore previous SuggestionSpans 2909 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 2910 for (int i = 0; i < length; i++) { 2911 // Only spans that include the modified region make sense after replacement 2912 // Spans partially included in the replaced region are removed, there is no 2913 // way to assign them a valid range after replacement 2914 if (suggestionSpansStarts[i] <= spanStart && 2915 suggestionSpansEnds[i] >= spanEnd) { 2916 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2917 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 2918 } 2919 } 2920 2921 // Move cursor at the end of the replaced word 2922 final int newCursorPosition = spanEnd + lengthDifference; 2923 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2924 } 2925 2926 hide(); 2927 } 2928 } 2929 2930 /** 2931 * An ActionMode Callback class that is used to provide actions while in text selection mode. 2932 * 2933 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 2934 * on which of these this TextView supports. 2935 */ 2936 private class SelectionActionModeCallback implements ActionMode.Callback { 2937 2938 @Override 2939 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 2940 final boolean legacy = mTextView.getContext().getApplicationInfo().targetSdkVersion < 2941 Build.VERSION_CODES.LOLLIPOP; 2942 final Context context = !legacy && menu instanceof MenuBuilder ? 2943 ((MenuBuilder) menu).getContext() : 2944 mTextView.getContext(); 2945 final TypedArray styledAttributes = context.obtainStyledAttributes( 2946 com.android.internal.R.styleable.SelectionModeDrawables); 2947 2948 mode.setTitle(mTextView.getContext().getString( 2949 com.android.internal.R.string.textSelectionCABTitle)); 2950 mode.setSubtitle(null); 2951 mode.setTitleOptionalHint(true); 2952 2953 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 2954 setIcon(styledAttributes.getResourceId( 2955 R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0)). 2956 setAlphabeticShortcut('a'). 2957 setShowAsAction( 2958 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2959 2960 if (mTextView.canCut()) { 2961 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 2962 setIcon(styledAttributes.getResourceId( 2963 R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)). 2964 setAlphabeticShortcut('x'). 2965 setShowAsAction( 2966 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2967 } 2968 2969 if (mTextView.canCopy()) { 2970 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 2971 setIcon(styledAttributes.getResourceId( 2972 R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)). 2973 setAlphabeticShortcut('c'). 2974 setShowAsAction( 2975 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2976 } 2977 2978 if (mTextView.canPaste()) { 2979 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 2980 setIcon(styledAttributes.getResourceId( 2981 R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)). 2982 setAlphabeticShortcut('v'). 2983 setShowAsAction( 2984 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2985 } 2986 2987 if (mTextView.isSuggestionsEnabled() && isCursorInsideSuggestionSpan()) { 2988 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 2989 setShowAsAction( 2990 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 2991 } 2992 2993 styledAttributes.recycle(); 2994 2995 if (mCustomSelectionActionModeCallback != null) { 2996 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 2997 // The custom mode can choose to cancel the action mode 2998 return false; 2999 } 3000 } 3001 3002 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3003 mTextView.setHasTransientState(true); 3004 return true; 3005 } else { 3006 return false; 3007 } 3008 } 3009 3010 @Override 3011 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3012 if (mCustomSelectionActionModeCallback != null) { 3013 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3014 } 3015 return true; 3016 } 3017 3018 @Override 3019 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3020 if (mCustomSelectionActionModeCallback != null && 3021 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3022 return true; 3023 } 3024 if (item.getItemId() == TextView.ID_REPLACE) { 3025 onReplace(); 3026 return true; 3027 } 3028 return mTextView.onTextContextMenuItem(item.getItemId()); 3029 } 3030 3031 @Override 3032 public void onDestroyActionMode(ActionMode mode) { 3033 if (mCustomSelectionActionModeCallback != null) { 3034 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3035 } 3036 3037 /* 3038 * If we're ending this mode because we're detaching from a window, 3039 * we still have selection state to preserve. Don't clear it, we'll 3040 * bring back the selection mode when (if) we get reattached. 3041 */ 3042 if (!mPreserveDetachedSelection) { 3043 Selection.setSelection((Spannable) mTextView.getText(), 3044 mTextView.getSelectionEnd()); 3045 mTextView.setHasTransientState(false); 3046 } 3047 3048 if (mSelectionModifierCursorController != null) { 3049 mSelectionModifierCursorController.hide(); 3050 } 3051 3052 mSelectionActionMode = null; 3053 } 3054 } 3055 3056 private void onReplace() { 3057 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3058 stopSelectionActionMode(); 3059 Selection.setSelection((Spannable) mTextView.getText(), middle); 3060 showSuggestions(); 3061 } 3062 3063 private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener { 3064 private static final int POPUP_TEXT_LAYOUT = 3065 com.android.internal.R.layout.text_edit_action_popup_text; 3066 private TextView mPasteTextView; 3067 private TextView mReplaceTextView; 3068 3069 @Override 3070 protected void createPopupWindow() { 3071 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 3072 com.android.internal.R.attr.textSelectHandleWindowStyle); 3073 mPopupWindow.setClippingEnabled(true); 3074 } 3075 3076 @Override 3077 protected void initContentView() { 3078 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 3079 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 3080 mContentView = linearLayout; 3081 mContentView.setBackgroundResource( 3082 com.android.internal.R.drawable.text_edit_paste_window); 3083 3084 LayoutInflater inflater = (LayoutInflater) mTextView.getContext(). 3085 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 3086 3087 LayoutParams wrapContent = new LayoutParams( 3088 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 3089 3090 mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 3091 mPasteTextView.setLayoutParams(wrapContent); 3092 mContentView.addView(mPasteTextView); 3093 mPasteTextView.setText(com.android.internal.R.string.paste); 3094 mPasteTextView.setOnClickListener(this); 3095 3096 mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 3097 mReplaceTextView.setLayoutParams(wrapContent); 3098 mContentView.addView(mReplaceTextView); 3099 mReplaceTextView.setText(com.android.internal.R.string.replace); 3100 mReplaceTextView.setOnClickListener(this); 3101 } 3102 3103 @Override 3104 public void show() { 3105 boolean canPaste = mTextView.canPaste(); 3106 boolean canSuggest = mTextView.isSuggestionsEnabled() && isCursorInsideSuggestionSpan(); 3107 mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE); 3108 mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE); 3109 3110 if (!canPaste && !canSuggest) return; 3111 3112 super.show(); 3113 } 3114 3115 @Override 3116 public void onClick(View view) { 3117 if (view == mPasteTextView && mTextView.canPaste()) { 3118 mTextView.onTextContextMenuItem(TextView.ID_PASTE); 3119 hide(); 3120 } else if (view == mReplaceTextView) { 3121 onReplace(); 3122 } 3123 } 3124 3125 @Override 3126 protected int getTextOffset() { 3127 return (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 3128 } 3129 3130 @Override 3131 protected int getVerticalLocalPosition(int line) { 3132 return mTextView.getLayout().getLineTop(line) - mContentView.getMeasuredHeight(); 3133 } 3134 3135 @Override 3136 protected int clipVertically(int positionY) { 3137 if (positionY < 0) { 3138 final int offset = getTextOffset(); 3139 final Layout layout = mTextView.getLayout(); 3140 final int line = layout.getLineForOffset(offset); 3141 positionY += layout.getLineBottom(line) - layout.getLineTop(line); 3142 positionY += mContentView.getMeasuredHeight(); 3143 3144 // Assumes insertion and selection handles share the same height 3145 final Drawable handle = mTextView.getContext().getDrawable( 3146 mTextView.mTextSelectHandleRes); 3147 positionY += handle.getIntrinsicHeight(); 3148 } 3149 3150 return positionY; 3151 } 3152 } 3153 3154 /** 3155 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3156 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3157 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3158 */ 3159 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3160 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3161 final int[] mTmpIntOffset = new int[2]; 3162 final Matrix mViewToScreenMatrix = new Matrix(); 3163 3164 @Override 3165 public void updatePosition(int parentPositionX, int parentPositionY, 3166 boolean parentPositionChanged, boolean parentScrolled) { 3167 final InputMethodState ims = mInputMethodState; 3168 if (ims == null || ims.mBatchEditNesting > 0) { 3169 return; 3170 } 3171 final InputMethodManager imm = InputMethodManager.peekInstance(); 3172 if (null == imm) { 3173 return; 3174 } 3175 if (!imm.isActive(mTextView)) { 3176 return; 3177 } 3178 // Skip if the IME has not requested the cursor/anchor position. 3179 if (!imm.isCursorAnchorInfoEnabled()) { 3180 return; 3181 } 3182 Layout layout = mTextView.getLayout(); 3183 if (layout == null) { 3184 return; 3185 } 3186 3187 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3188 builder.reset(); 3189 3190 final int selectionStart = mTextView.getSelectionStart(); 3191 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3192 3193 // Construct transformation matrix from view local coordinates to screen coordinates. 3194 mViewToScreenMatrix.set(mTextView.getMatrix()); 3195 mTextView.getLocationOnScreen(mTmpIntOffset); 3196 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3197 builder.setMatrix(mViewToScreenMatrix); 3198 3199 final float viewportToContentHorizontalOffset = 3200 mTextView.viewportToContentHorizontalOffset(); 3201 final float viewportToContentVerticalOffset = 3202 mTextView.viewportToContentVerticalOffset(); 3203 3204 final CharSequence text = mTextView.getText(); 3205 if (text instanceof Spannable) { 3206 final Spannable sp = (Spannable) text; 3207 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3208 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3209 if (composingTextEnd < composingTextStart) { 3210 final int temp = composingTextEnd; 3211 composingTextEnd = composingTextStart; 3212 composingTextStart = temp; 3213 } 3214 final boolean hasComposingText = 3215 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3216 if (hasComposingText) { 3217 final CharSequence composingText = text.subSequence(composingTextStart, 3218 composingTextEnd); 3219 builder.setComposingText(composingTextStart, composingText); 3220 3221 final int minLine = layout.getLineForOffset(composingTextStart); 3222 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3223 for (int line = minLine; line <= maxLine; ++line) { 3224 final int lineStart = layout.getLineStart(line); 3225 final int lineEnd = layout.getLineEnd(line); 3226 final int offsetStart = Math.max(lineStart, composingTextStart); 3227 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3228 final boolean ltrLine = 3229 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3230 final float[] widths = new float[offsetEnd - offsetStart]; 3231 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3232 final float top = layout.getLineTop(line); 3233 final float bottom = layout.getLineBottom(line); 3234 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3235 final float charWidth = widths[offset - offsetStart]; 3236 final boolean isRtl = layout.isRtlCharAt(offset); 3237 final float primary = layout.getPrimaryHorizontal(offset); 3238 final float secondary = layout.getSecondaryHorizontal(offset); 3239 // TODO: This doesn't work perfectly for text with custom styles and 3240 // TAB chars. 3241 final float left; 3242 final float right; 3243 if (ltrLine) { 3244 if (isRtl) { 3245 left = secondary - charWidth; 3246 right = secondary; 3247 } else { 3248 left = primary; 3249 right = primary + charWidth; 3250 } 3251 } else { 3252 if (!isRtl) { 3253 left = secondary; 3254 right = secondary + charWidth; 3255 } else { 3256 left = primary - charWidth; 3257 right = primary; 3258 } 3259 } 3260 // TODO: Check top-right and bottom-left as well. 3261 final float localLeft = left + viewportToContentHorizontalOffset; 3262 final float localRight = right + viewportToContentHorizontalOffset; 3263 final float localTop = top + viewportToContentVerticalOffset; 3264 final float localBottom = bottom + viewportToContentVerticalOffset; 3265 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3266 final boolean isBottomRightVisible = 3267 isPositionVisible(localRight, localBottom); 3268 int characterBoundsFlags = 0; 3269 if (isTopLeftVisible || isBottomRightVisible) { 3270 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3271 } 3272 if (!isTopLeftVisible || !isTopLeftVisible) { 3273 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3274 } 3275 if (isRtl) { 3276 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3277 } 3278 // Here offset is the index in Java chars. 3279 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3280 localBottom, characterBoundsFlags); 3281 } 3282 } 3283 } 3284 } 3285 3286 // Treat selectionStart as the insertion point. 3287 if (0 <= selectionStart) { 3288 final int offset = selectionStart; 3289 final int line = layout.getLineForOffset(offset); 3290 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3291 + viewportToContentHorizontalOffset; 3292 final float insertionMarkerTop = layout.getLineTop(line) 3293 + viewportToContentVerticalOffset; 3294 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3295 + viewportToContentVerticalOffset; 3296 final float insertionMarkerBottom = layout.getLineBottom(line) 3297 + viewportToContentVerticalOffset; 3298 final boolean isTopVisible = 3299 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3300 final boolean isBottomVisible = 3301 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3302 int insertionMarkerFlags = 0; 3303 if (isTopVisible || isBottomVisible) { 3304 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3305 } 3306 if (!isTopVisible || !isBottomVisible) { 3307 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3308 } 3309 if (layout.isRtlCharAt(offset)) { 3310 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3311 } 3312 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3313 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3314 } 3315 3316 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3317 } 3318 } 3319 3320 private abstract class HandleView extends View implements TextViewPositionListener { 3321 protected Drawable mDrawable; 3322 protected Drawable mDrawableLtr; 3323 protected Drawable mDrawableRtl; 3324 private final PopupWindow mContainer; 3325 // Position with respect to the parent TextView 3326 private int mPositionX, mPositionY; 3327 private boolean mIsDragging; 3328 // Offset from touch position to mPosition 3329 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3330 protected int mHotspotX; 3331 protected int mHorizontalGravity; 3332 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3333 private float mTouchOffsetY; 3334 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3335 private float mIdealVerticalOffset; 3336 // Parent's (TextView) previous position in window 3337 private int mLastParentX, mLastParentY; 3338 // Previous text character offset 3339 private int mPreviousOffset = -1; 3340 // Previous text character offset 3341 private boolean mPositionHasChanged = true; 3342 // Minimum touch target size for handles 3343 private int mMinSize; 3344 // Indicates the line of text that the handle is on. 3345 protected int mLine = -1; 3346 3347 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3348 super(mTextView.getContext()); 3349 mContainer = new PopupWindow(mTextView.getContext(), null, 3350 com.android.internal.R.attr.textSelectHandleWindowStyle); 3351 mContainer.setSplitTouchEnabled(true); 3352 mContainer.setClippingEnabled(false); 3353 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3354 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3355 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3356 mContainer.setContentView(this); 3357 3358 mDrawableLtr = drawableLtr; 3359 mDrawableRtl = drawableRtl; 3360 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3361 com.android.internal.R.dimen.text_handle_min_size); 3362 3363 updateDrawable(); 3364 3365 final int handleHeight = getPreferredHeight(); 3366 mTouchOffsetY = -0.3f * handleHeight; 3367 mIdealVerticalOffset = 0.7f * handleHeight; 3368 } 3369 3370 protected void updateDrawable() { 3371 final int offset = getCurrentCursorOffset(); 3372 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3373 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3374 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3375 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3376 } 3377 3378 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3379 protected abstract int getHorizontalGravity(boolean isRtlRun); 3380 3381 // Touch-up filter: number of previous positions remembered 3382 private static final int HISTORY_SIZE = 5; 3383 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3384 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3385 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3386 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3387 private int mPreviousOffsetIndex = 0; 3388 private int mNumberPreviousOffsets = 0; 3389 3390 private void startTouchUpFilter(int offset) { 3391 mNumberPreviousOffsets = 0; 3392 addPositionToTouchUpFilter(offset); 3393 } 3394 3395 private void addPositionToTouchUpFilter(int offset) { 3396 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3397 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3398 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3399 mNumberPreviousOffsets++; 3400 } 3401 3402 private void filterOnTouchUp() { 3403 final long now = SystemClock.uptimeMillis(); 3404 int i = 0; 3405 int index = mPreviousOffsetIndex; 3406 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3407 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3408 i++; 3409 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3410 } 3411 3412 if (i > 0 && i < iMax && 3413 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3414 positionAtCursorOffset(mPreviousOffsets[index], false); 3415 } 3416 } 3417 3418 public boolean offsetHasBeenChanged() { 3419 return mNumberPreviousOffsets > 1; 3420 } 3421 3422 @Override 3423 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3424 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3425 } 3426 3427 private int getPreferredWidth() { 3428 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3429 } 3430 3431 private int getPreferredHeight() { 3432 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3433 } 3434 3435 public void show() { 3436 if (isShowing()) return; 3437 3438 getPositionListener().addSubscriber(this, true /* local position may change */); 3439 3440 // Make sure the offset is always considered new, even when focusing at same position 3441 mPreviousOffset = -1; 3442 positionAtCursorOffset(getCurrentCursorOffset(), false); 3443 } 3444 3445 protected void dismiss() { 3446 mIsDragging = false; 3447 mContainer.dismiss(); 3448 onDetached(); 3449 } 3450 3451 public void hide() { 3452 dismiss(); 3453 3454 getPositionListener().removeSubscriber(this); 3455 } 3456 3457 public boolean isShowing() { 3458 return mContainer.isShowing(); 3459 } 3460 3461 private boolean isVisible() { 3462 // Always show a dragging handle. 3463 if (mIsDragging) { 3464 return true; 3465 } 3466 3467 if (mTextView.isInBatchEditMode()) { 3468 return false; 3469 } 3470 3471 return isPositionVisible(mPositionX + mHotspotX, mPositionY); 3472 } 3473 3474 public abstract int getCurrentCursorOffset(); 3475 3476 protected abstract void updateSelection(int offset); 3477 3478 public abstract void updatePosition(float x, float y); 3479 3480 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3481 // A HandleView relies on the layout, which may be nulled by external methods 3482 Layout layout = mTextView.getLayout(); 3483 if (layout == null) { 3484 // Will update controllers' state, hiding them and stopping selection mode if needed 3485 prepareCursorControllers(); 3486 return; 3487 } 3488 3489 boolean offsetChanged = offset != mPreviousOffset; 3490 if (offsetChanged || parentScrolled) { 3491 if (offsetChanged) { 3492 updateSelection(offset); 3493 addPositionToTouchUpFilter(offset); 3494 } 3495 final int line = layout.getLineForOffset(offset); 3496 mLine = line; 3497 3498 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3499 getHorizontalOffset() + getCursorOffset()); 3500 mPositionY = layout.getLineBottom(line); 3501 3502 // Take TextView's padding and scroll into account. 3503 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3504 mPositionY += mTextView.viewportToContentVerticalOffset(); 3505 3506 mPreviousOffset = offset; 3507 mPositionHasChanged = true; 3508 } 3509 } 3510 3511 public void updatePosition(int parentPositionX, int parentPositionY, 3512 boolean parentPositionChanged, boolean parentScrolled) { 3513 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3514 if (parentPositionChanged || mPositionHasChanged) { 3515 if (mIsDragging) { 3516 // Update touchToWindow offset in case of parent scrolling while dragging 3517 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3518 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3519 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3520 mLastParentX = parentPositionX; 3521 mLastParentY = parentPositionY; 3522 } 3523 3524 onHandleMoved(); 3525 } 3526 3527 if (isVisible()) { 3528 final int positionX = parentPositionX + mPositionX; 3529 final int positionY = parentPositionY + mPositionY; 3530 if (isShowing()) { 3531 mContainer.update(positionX, positionY, -1, -1); 3532 } else { 3533 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3534 positionX, positionY); 3535 } 3536 } else { 3537 if (isShowing()) { 3538 dismiss(); 3539 } 3540 } 3541 3542 mPositionHasChanged = false; 3543 } 3544 } 3545 3546 public void showAtLocation(int offset) { 3547 // TODO - investigate if there's a better way to show the handles 3548 // after the drag accelerator has occured. 3549 int[] tmpCords = new int[2]; 3550 mTextView.getLocationInWindow(tmpCords); 3551 3552 Layout layout = mTextView.getLayout(); 3553 int posX = tmpCords[0]; 3554 int posY = tmpCords[1]; 3555 3556 final int line = layout.getLineForOffset(offset); 3557 3558 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3559 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3560 int startY = layout.getLineBottom(line); 3561 3562 // Take TextView's padding and scroll into account. 3563 startX += mTextView.viewportToContentHorizontalOffset(); 3564 startY += mTextView.viewportToContentVerticalOffset(); 3565 3566 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3567 startX + posX, startY + posY); 3568 } 3569 3570 @Override 3571 protected void onDraw(Canvas c) { 3572 final int drawWidth = mDrawable.getIntrinsicWidth(); 3573 final int left = getHorizontalOffset(); 3574 3575 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3576 mDrawable.draw(c); 3577 } 3578 3579 private int getHorizontalOffset() { 3580 final int width = getPreferredWidth(); 3581 final int drawWidth = mDrawable.getIntrinsicWidth(); 3582 final int left; 3583 switch (mHorizontalGravity) { 3584 case Gravity.LEFT: 3585 left = 0; 3586 break; 3587 default: 3588 case Gravity.CENTER: 3589 left = (width - drawWidth) / 2; 3590 break; 3591 case Gravity.RIGHT: 3592 left = width - drawWidth; 3593 break; 3594 } 3595 return left; 3596 } 3597 3598 protected int getCursorOffset() { 3599 return 0; 3600 } 3601 3602 @Override 3603 public boolean onTouchEvent(MotionEvent ev) { 3604 switch (ev.getActionMasked()) { 3605 case MotionEvent.ACTION_DOWN: { 3606 startTouchUpFilter(getCurrentCursorOffset()); 3607 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3608 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3609 3610 final PositionListener positionListener = getPositionListener(); 3611 mLastParentX = positionListener.getPositionX(); 3612 mLastParentY = positionListener.getPositionY(); 3613 mIsDragging = true; 3614 break; 3615 } 3616 3617 case MotionEvent.ACTION_MOVE: { 3618 final float rawX = ev.getRawX(); 3619 final float rawY = ev.getRawY(); 3620 3621 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3622 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3623 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3624 float newVerticalOffset; 3625 if (previousVerticalOffset < mIdealVerticalOffset) { 3626 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3627 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3628 } else { 3629 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3630 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3631 } 3632 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3633 3634 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3635 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3636 3637 updatePosition(newPosX, newPosY); 3638 break; 3639 } 3640 3641 case MotionEvent.ACTION_UP: 3642 filterOnTouchUp(); 3643 mIsDragging = false; 3644 break; 3645 3646 case MotionEvent.ACTION_CANCEL: 3647 mIsDragging = false; 3648 break; 3649 } 3650 return true; 3651 } 3652 3653 public boolean isDragging() { 3654 return mIsDragging; 3655 } 3656 3657 void onHandleMoved() {} 3658 3659 public void onDetached() {} 3660 } 3661 3662 private class InsertionHandleView extends HandleView { 3663 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3664 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3665 3666 // Used to detect taps on the insertion handle, which will affect the selection action mode 3667 private float mDownPositionX, mDownPositionY; 3668 private Runnable mHider; 3669 3670 public InsertionHandleView(Drawable drawable) { 3671 super(drawable, drawable); 3672 } 3673 3674 @Override 3675 public void show() { 3676 super.show(); 3677 3678 final long durationSinceCutOrCopy = 3679 SystemClock.uptimeMillis() - TextView.LAST_CUT_OR_COPY_TIME; 3680 if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) { 3681 startSelectionActionModeWithoutSelection(); 3682 } 3683 3684 hideAfterDelay(); 3685 } 3686 3687 private void hideAfterDelay() { 3688 if (mHider == null) { 3689 mHider = new Runnable() { 3690 public void run() { 3691 hide(); 3692 } 3693 }; 3694 } else { 3695 removeHiderCallback(); 3696 } 3697 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3698 } 3699 3700 private void removeHiderCallback() { 3701 if (mHider != null) { 3702 mTextView.removeCallbacks(mHider); 3703 } 3704 } 3705 3706 @Override 3707 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3708 return drawable.getIntrinsicWidth() / 2; 3709 } 3710 3711 @Override 3712 protected int getHorizontalGravity(boolean isRtlRun) { 3713 return Gravity.CENTER_HORIZONTAL; 3714 } 3715 3716 @Override 3717 protected int getCursorOffset() { 3718 int offset = super.getCursorOffset(); 3719 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3720 if (cursor != null) { 3721 cursor.getPadding(mTempRect); 3722 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3723 } 3724 return offset; 3725 } 3726 3727 @Override 3728 public boolean onTouchEvent(MotionEvent ev) { 3729 final boolean result = super.onTouchEvent(ev); 3730 3731 switch (ev.getActionMasked()) { 3732 case MotionEvent.ACTION_DOWN: 3733 mDownPositionX = ev.getRawX(); 3734 mDownPositionY = ev.getRawY(); 3735 break; 3736 3737 case MotionEvent.ACTION_UP: 3738 if (!offsetHasBeenChanged()) { 3739 final float deltaX = mDownPositionX - ev.getRawX(); 3740 final float deltaY = mDownPositionY - ev.getRawY(); 3741 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3742 3743 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3744 mTextView.getContext()); 3745 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3746 3747 if (distanceSquared < touchSlop * touchSlop) { 3748 // Tapping on the handle toggles the selection action mode. 3749 if (mSelectionActionMode != null) { 3750 mSelectionActionMode.finish(); 3751 } else { 3752 startSelectionActionModeWithoutSelection(); 3753 } 3754 } 3755 } 3756 hideAfterDelay(); 3757 break; 3758 3759 case MotionEvent.ACTION_CANCEL: 3760 hideAfterDelay(); 3761 break; 3762 3763 default: 3764 break; 3765 } 3766 3767 return result; 3768 } 3769 3770 @Override 3771 public int getCurrentCursorOffset() { 3772 return mTextView.getSelectionStart(); 3773 } 3774 3775 @Override 3776 public void updateSelection(int offset) { 3777 Selection.setSelection((Spannable) mTextView.getText(), offset); 3778 } 3779 3780 @Override 3781 public void updatePosition(float x, float y) { 3782 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3783 } 3784 3785 @Override 3786 void onHandleMoved() { 3787 super.onHandleMoved(); 3788 removeHiderCallback(); 3789 } 3790 3791 @Override 3792 public void onDetached() { 3793 super.onDetached(); 3794 removeHiderCallback(); 3795 } 3796 } 3797 3798 private class SelectionStartHandleView extends HandleView { 3799 // The previous offset this handle was at. 3800 private int mPrevOffset; 3801 // Indicates whether the cursor is making adjustments within a word. 3802 private boolean mInWord = false; 3803 // Offset to track difference between touch and word boundary. 3804 protected int mTouchWordOffset; 3805 3806 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3807 super(drawableLtr, drawableRtl); 3808 } 3809 3810 @Override 3811 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3812 return isRtlRun ? 0 : drawable.getIntrinsicWidth(); 3813 } 3814 3815 @Override 3816 protected int getHorizontalGravity(boolean isRtlRun) { 3817 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 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 mTextView.getSelectionEnd()); 3829 updateDrawable(); 3830 } 3831 3832 @Override 3833 public void updatePosition(float x, float y) { 3834 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3835 final int currLine = mTextView.getLineAtCoordinate(y); 3836 int offset = trueOffset; 3837 boolean positionCursor = false; 3838 3839 int end = getWordEnd(offset, true); 3840 int start = getWordStart(offset); 3841 3842 if (offset < mPrevOffset) { 3843 // User is increasing the selection. 3844 if (!mInWord || currLine < mLine) { 3845 // We're not in a word, or we're on a different line so we'll expand by 3846 // word. First ensure the user has at least entered the next word. 3847 int offsetToWord = Math.min((end - start) / 2, 2); 3848 if (offset <= end - offsetToWord || currLine < mLine) { 3849 offset = start; 3850 } else { 3851 offset = mPrevOffset; 3852 } 3853 } 3854 mPrevOffset = offset; 3855 mTouchWordOffset = Math.max(trueOffset - offset, 0); 3856 mInWord = !isStartBoundary(offset); 3857 positionCursor = true; 3858 } else if (offset - mTouchWordOffset > mPrevOffset) { 3859 // User is shrinking the selection. 3860 if (currLine > mLine) { 3861 // We're on a different line, so we'll snap to word boundaries. 3862 offset = end; 3863 } 3864 offset -= mTouchWordOffset; 3865 mPrevOffset = offset; 3866 mInWord = !isEndBoundary(offset); 3867 positionCursor = true; 3868 } 3869 3870 // Handles can not cross and selection is at least one character. 3871 if (positionCursor) { 3872 final int selectionEnd = mTextView.getSelectionEnd(); 3873 if (offset >= selectionEnd) { 3874 // We can't cross the handles so let's just constrain the Y value. 3875 int alteredOffset = mTextView.getOffsetAtCoordinate(mLine, x); 3876 if (alteredOffset >= selectionEnd) { 3877 // Can't pass the other drag handle. 3878 offset = Math.max(0, selectionEnd - 1); 3879 } else { 3880 offset = alteredOffset; 3881 } 3882 } 3883 positionAtCursorOffset(offset, false); 3884 } 3885 } 3886 3887 @Override 3888 public boolean onTouchEvent(MotionEvent event) { 3889 boolean superResult = super.onTouchEvent(event); 3890 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 3891 // Reset the touch word offset when the user has lifted their finger. 3892 mTouchWordOffset = 0; 3893 } 3894 return superResult; 3895 } 3896 } 3897 3898 private class SelectionEndHandleView extends HandleView { 3899 // The previous offset this handle was at. 3900 private int mPrevOffset; 3901 // Indicates whether the cursor is making adjustments within a word. 3902 private boolean mInWord = false; 3903 // Offset to track difference between touch and word boundary. 3904 protected int mTouchWordOffset; 3905 3906 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3907 super(drawableLtr, drawableRtl); 3908 } 3909 3910 @Override 3911 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3912 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 3913 } 3914 3915 @Override 3916 protected int getHorizontalGravity(boolean isRtlRun) { 3917 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 3918 } 3919 3920 @Override 3921 public int getCurrentCursorOffset() { 3922 return mTextView.getSelectionEnd(); 3923 } 3924 3925 @Override 3926 public void updateSelection(int offset) { 3927 Selection.setSelection((Spannable) mTextView.getText(), 3928 mTextView.getSelectionStart(), offset); 3929 updateDrawable(); 3930 } 3931 3932 @Override 3933 public void updatePosition(float x, float y) { 3934 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3935 final int currLine = mTextView.getLineAtCoordinate(y); 3936 int offset = trueOffset; 3937 boolean positionCursor = false; 3938 3939 int end = getWordEnd(offset, true); 3940 int start = getWordStart(offset); 3941 3942 if (offset > mPrevOffset) { 3943 // User is increasing the selection. 3944 if (!mInWord || currLine > mLine) { 3945 // We're not in a word, or we're on a different line so we'll expand by 3946 // word. First ensure the user has at least entered the next word. 3947 int midPoint = Math.min((end - start) / 2, 2); 3948 if (offset >= start + midPoint || currLine > mLine) { 3949 offset = end; 3950 } else { 3951 offset = mPrevOffset; 3952 } 3953 } 3954 mPrevOffset = offset; 3955 mTouchWordOffset = Math.max(offset - trueOffset, 0); 3956 mInWord = !isEndBoundary(offset); 3957 positionCursor = true; 3958 } else if (offset + mTouchWordOffset < mPrevOffset) { 3959 // User is shrinking the selection. 3960 if (currLine > mLine) { 3961 // We're on a different line, so we'll snap to word boundaries. 3962 offset = getWordStart(offset); 3963 } 3964 offset += mTouchWordOffset; 3965 mPrevOffset = offset; 3966 positionCursor = true; 3967 mInWord = !isStartBoundary(offset); 3968 } 3969 3970 if (positionCursor) { 3971 final int selectionStart = mTextView.getSelectionStart(); 3972 if (offset <= selectionStart) { 3973 // We can't cross the handles so let's just constrain the Y value. 3974 int alteredOffset = mTextView.getOffsetAtCoordinate(mLine, x); 3975 int length = mTextView.getText().length(); 3976 if (alteredOffset <= selectionStart) { 3977 // Can't pass the other drag handle. 3978 offset = Math.min(selectionStart + 1, length); 3979 } else { 3980 offset = Math.min(alteredOffset, length); 3981 } 3982 } 3983 positionAtCursorOffset(offset, false); 3984 } 3985 } 3986 3987 @Override 3988 public boolean onTouchEvent(MotionEvent event) { 3989 boolean superResult = super.onTouchEvent(event); 3990 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 3991 // Reset the touch word offset when the user has lifted their finger. 3992 mTouchWordOffset = 0; 3993 } 3994 return superResult; 3995 } 3996 } 3997 3998 /** 3999 * A CursorController instance can be used to control a cursor in the text. 4000 */ 4001 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4002 /** 4003 * Makes the cursor controller visible on screen. 4004 * See also {@link #hide()}. 4005 */ 4006 public void show(); 4007 4008 /** 4009 * Hide the cursor controller from screen. 4010 * See also {@link #show()}. 4011 */ 4012 public void hide(); 4013 4014 /** 4015 * Called when the view is detached from window. Perform house keeping task, such as 4016 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4017 * preventing the activity from being recycled. 4018 */ 4019 public void onDetached(); 4020 } 4021 4022 private class InsertionPointCursorController implements CursorController { 4023 private InsertionHandleView mHandle; 4024 4025 public void show() { 4026 getHandle().show(); 4027 } 4028 4029 public void hide() { 4030 if (mHandle != null) { 4031 mHandle.hide(); 4032 } 4033 } 4034 4035 public void onTouchModeChanged(boolean isInTouchMode) { 4036 if (!isInTouchMode) { 4037 hide(); 4038 } 4039 } 4040 4041 private InsertionHandleView getHandle() { 4042 if (mSelectHandleCenter == null) { 4043 mSelectHandleCenter = mTextView.getContext().getDrawable( 4044 mTextView.mTextSelectHandleRes); 4045 } 4046 if (mHandle == null) { 4047 mHandle = new InsertionHandleView(mSelectHandleCenter); 4048 } 4049 return mHandle; 4050 } 4051 4052 @Override 4053 public void onDetached() { 4054 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4055 observer.removeOnTouchModeChangeListener(this); 4056 4057 if (mHandle != null) mHandle.onDetached(); 4058 } 4059 } 4060 4061 class SelectionModifierCursorController implements CursorController { 4062 private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds 4063 // The cursor controller handles, lazily created when shown. 4064 private SelectionStartHandleView mStartHandle; 4065 private SelectionEndHandleView mEndHandle; 4066 // The offsets of that last touch down event. Remembered to start selection there. 4067 private int mMinTouchOffset, mMaxTouchOffset; 4068 4069 // Double tap detection 4070 private long mPreviousTapUpTime = 0; 4071 private float mDownPositionX, mDownPositionY; 4072 private boolean mGestureStayedInTapRegion; 4073 4074 // Where the user first starts the drag motion. 4075 private int mStartOffset = -1; 4076 // Indicates whether the user is selecting text and using the drag accelerator. 4077 private boolean mDragAcceleratorActive; 4078 4079 SelectionModifierCursorController() { 4080 resetTouchOffsets(); 4081 } 4082 4083 public void show() { 4084 if (mTextView.isInBatchEditMode()) { 4085 return; 4086 } 4087 initDrawables(); 4088 initHandles(); 4089 hideInsertionPointCursorController(); 4090 } 4091 4092 private void initDrawables() { 4093 if (mSelectHandleLeft == null) { 4094 mSelectHandleLeft = mTextView.getContext().getDrawable( 4095 mTextView.mTextSelectHandleLeftRes); 4096 } 4097 if (mSelectHandleRight == null) { 4098 mSelectHandleRight = mTextView.getContext().getDrawable( 4099 mTextView.mTextSelectHandleRightRes); 4100 } 4101 } 4102 4103 private void initHandles() { 4104 // Lazy object creation has to be done before updatePosition() is called. 4105 if (mStartHandle == null) { 4106 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4107 } 4108 if (mEndHandle == null) { 4109 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4110 } 4111 4112 mStartHandle.show(); 4113 mEndHandle.show(); 4114 4115 hideInsertionPointCursorController(); 4116 } 4117 4118 public void hide() { 4119 if (mStartHandle != null) mStartHandle.hide(); 4120 if (mEndHandle != null) mEndHandle.hide(); 4121 } 4122 4123 public void enterDrag() { 4124 // Just need to init the handles / hide insertion cursor. 4125 show(); 4126 mDragAcceleratorActive = true; 4127 // Start location of selection. 4128 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4129 mLastDownPositionY); 4130 // Don't show the handles until user has lifted finger. 4131 hide(); 4132 4133 // This stops scrolling parents from intercepting the touch event, allowing 4134 // the user to continue dragging across the screen to select text; TextView will 4135 // scroll as necessary. 4136 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4137 } 4138 4139 public void onTouchEvent(MotionEvent event) { 4140 // This is done even when the View does not have focus, so that long presses can start 4141 // selection and tap can move cursor from this tap position. 4142 switch (event.getActionMasked()) { 4143 case MotionEvent.ACTION_DOWN: 4144 final float x = event.getX(); 4145 final float y = event.getY(); 4146 4147 // Remember finger down position, to be able to start selection from there. 4148 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4149 4150 // Double tap detection 4151 if (mGestureStayedInTapRegion) { 4152 long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime; 4153 if (duration <= ViewConfiguration.getDoubleTapTimeout()) { 4154 final float deltaX = x - mDownPositionX; 4155 final float deltaY = y - mDownPositionY; 4156 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4157 4158 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4159 mTextView.getContext()); 4160 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4161 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4162 4163 if (stayedInArea && isPositionOnText(x, y)) { 4164 startSelectionActionModeWithSelection(); 4165 mDiscardNextActionUp = true; 4166 } 4167 } 4168 } 4169 4170 mDownPositionX = x; 4171 mDownPositionY = y; 4172 mGestureStayedInTapRegion = true; 4173 break; 4174 4175 case MotionEvent.ACTION_POINTER_DOWN: 4176 case MotionEvent.ACTION_POINTER_UP: 4177 // Handle multi-point gestures. Keep min and max offset positions. 4178 // Only activated for devices that correctly handle multi-touch. 4179 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4180 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4181 updateMinAndMaxOffsets(event); 4182 } 4183 break; 4184 4185 case MotionEvent.ACTION_MOVE: 4186 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4187 mTextView.getContext()); 4188 4189 if (mGestureStayedInTapRegion) { 4190 final float deltaX = event.getX() - mDownPositionX; 4191 final float deltaY = event.getY() - mDownPositionY; 4192 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4193 4194 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4195 4196 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4197 mGestureStayedInTapRegion = false; 4198 } 4199 } 4200 4201 if (mStartHandle != null && mStartHandle.isShowing()) { 4202 // Don't do the drag if the handles are showing already. 4203 break; 4204 } 4205 4206 if (mStartOffset != -1) { 4207 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4208 event.getY()); 4209 int offset = rawOffset; 4210 4211 // We don't start "dragging" until the user is past the initial word that 4212 // gets selected on long press. 4213 int firstWordStart = getWordStart(mStartOffset); 4214 int firstWordEnd = getWordEnd(mStartOffset, false); 4215 if (offset > firstWordEnd || offset < firstWordStart) { 4216 4217 // Basically the goal in the below code is to have the highlight be 4218 // offset so that your finger isn't covering the end point. 4219 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4220 float mx = event.getX(); 4221 float my = event.getY(); 4222 if (mx > fingerOffset) mx -= fingerOffset; 4223 if (my > fingerOffset) my -= fingerOffset; 4224 offset = mTextView.getOffsetForPosition(mx, my); 4225 4226 // Perform the check for closeness at edge of view, if we're very close 4227 // don't adjust the offset to be in front of the finger - otherwise the 4228 // user can't select words at the edge. 4229 if (mTextView.getWidth() - fingerOffset > mx) { 4230 // We're going by word, so we need to make sure that the offset 4231 // that we get is within this, so we'll get the previous boundary. 4232 final WordIterator wordIterator = getWordIteratorWithText(); 4233 4234 final int precedingOffset = wordIterator.preceding(offset); 4235 if (mStartOffset < offset) { 4236 // Expanding with bottom handle, in this case the selection end 4237 // is before the finger. 4238 offset = Math.max(precedingOffset - 1, 0); 4239 } else { 4240 // Expand with the start handle, in this case the selection 4241 // start is before the finger. 4242 if (precedingOffset == WordIterator.DONE) { 4243 offset = 0; 4244 } else { 4245 offset = wordIterator.preceding(precedingOffset); 4246 } 4247 } 4248 } 4249 if (offset == WordIterator.DONE) 4250 offset = rawOffset; 4251 4252 // Need to adjust start offset based on direction of movement. 4253 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4254 : getWordEnd(mStartOffset, true); 4255 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4256 offset); 4257 } 4258 } 4259 break; 4260 4261 case MotionEvent.ACTION_UP: 4262 mPreviousTapUpTime = SystemClock.uptimeMillis(); 4263 if (mDragAcceleratorActive) { 4264 // No longer dragging to select text, let the parent intercept events. 4265 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4266 4267 show(); 4268 int startOffset = mTextView.getSelectionStart(); 4269 int endOffset = mTextView.getSelectionEnd(); 4270 4271 // Since we don't let drag handles pass once they're visible, we need to 4272 // make sure the start / end locations are correct because the user *can* 4273 // switch directions during the initial drag. 4274 if (endOffset < startOffset) { 4275 int tmp = endOffset; 4276 endOffset = startOffset; 4277 startOffset = tmp; 4278 4279 // Also update the selection with the right offsets in this case. 4280 Selection.setSelection((Spannable) mTextView.getText(), 4281 startOffset, endOffset); 4282 } 4283 4284 // Need to do this to display the handles. 4285 mStartHandle.showAtLocation(startOffset); 4286 mEndHandle.showAtLocation(endOffset); 4287 4288 // No longer the first dragging motion, reset. 4289 mDragAcceleratorActive = false; 4290 mStartOffset = -1; 4291 } 4292 break; 4293 } 4294 } 4295 4296 /** 4297 * @param event 4298 */ 4299 private void updateMinAndMaxOffsets(MotionEvent event) { 4300 int pointerCount = event.getPointerCount(); 4301 for (int index = 0; index < pointerCount; index++) { 4302 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4303 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4304 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4305 } 4306 } 4307 4308 public int getMinTouchOffset() { 4309 return mMinTouchOffset; 4310 } 4311 4312 public int getMaxTouchOffset() { 4313 return mMaxTouchOffset; 4314 } 4315 4316 public void resetTouchOffsets() { 4317 mMinTouchOffset = mMaxTouchOffset = -1; 4318 mStartOffset = -1; 4319 mDragAcceleratorActive = false; 4320 } 4321 4322 /** 4323 * @return true iff this controller is currently used to move the selection start. 4324 */ 4325 public boolean isSelectionStartDragged() { 4326 return mStartHandle != null && mStartHandle.isDragging(); 4327 } 4328 4329 /** 4330 * @return true if the user is selecting text using the drag accelerator. 4331 */ 4332 public boolean isDragAcceleratorActive() { 4333 return mDragAcceleratorActive; 4334 } 4335 4336 public void onTouchModeChanged(boolean isInTouchMode) { 4337 if (!isInTouchMode) { 4338 hide(); 4339 } 4340 } 4341 4342 @Override 4343 public void onDetached() { 4344 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4345 observer.removeOnTouchModeChangeListener(this); 4346 4347 if (mStartHandle != null) mStartHandle.onDetached(); 4348 if (mEndHandle != null) mEndHandle.onDetached(); 4349 } 4350 } 4351 4352 private class CorrectionHighlighter { 4353 private final Path mPath = new Path(); 4354 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4355 private int mStart, mEnd; 4356 private long mFadingStartTime; 4357 private RectF mTempRectF; 4358 private final static int FADE_OUT_DURATION = 400; 4359 4360 public CorrectionHighlighter() { 4361 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4362 applicationScale); 4363 mPaint.setStyle(Paint.Style.FILL); 4364 } 4365 4366 public void highlight(CorrectionInfo info) { 4367 mStart = info.getOffset(); 4368 mEnd = mStart + info.getNewText().length(); 4369 mFadingStartTime = SystemClock.uptimeMillis(); 4370 4371 if (mStart < 0 || mEnd < 0) { 4372 stopAnimation(); 4373 } 4374 } 4375 4376 public void draw(Canvas canvas, int cursorOffsetVertical) { 4377 if (updatePath() && updatePaint()) { 4378 if (cursorOffsetVertical != 0) { 4379 canvas.translate(0, cursorOffsetVertical); 4380 } 4381 4382 canvas.drawPath(mPath, mPaint); 4383 4384 if (cursorOffsetVertical != 0) { 4385 canvas.translate(0, -cursorOffsetVertical); 4386 } 4387 invalidate(true); // TODO invalidate cursor region only 4388 } else { 4389 stopAnimation(); 4390 invalidate(false); // TODO invalidate cursor region only 4391 } 4392 } 4393 4394 private boolean updatePaint() { 4395 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4396 if (duration > FADE_OUT_DURATION) return false; 4397 4398 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4399 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4400 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4401 ((int) (highlightColorAlpha * coef) << 24); 4402 mPaint.setColor(color); 4403 return true; 4404 } 4405 4406 private boolean updatePath() { 4407 final Layout layout = mTextView.getLayout(); 4408 if (layout == null) return false; 4409 4410 // Update in case text is edited while the animation is run 4411 final int length = mTextView.getText().length(); 4412 int start = Math.min(length, mStart); 4413 int end = Math.min(length, mEnd); 4414 4415 mPath.reset(); 4416 layout.getSelectionPath(start, end, mPath); 4417 return true; 4418 } 4419 4420 private void invalidate(boolean delayed) { 4421 if (mTextView.getLayout() == null) return; 4422 4423 if (mTempRectF == null) mTempRectF = new RectF(); 4424 mPath.computeBounds(mTempRectF, false); 4425 4426 int left = mTextView.getCompoundPaddingLeft(); 4427 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4428 4429 if (delayed) { 4430 mTextView.postInvalidateOnAnimation( 4431 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4432 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4433 } else { 4434 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4435 (int) mTempRectF.right, (int) mTempRectF.bottom); 4436 } 4437 } 4438 4439 private void stopAnimation() { 4440 Editor.this.mCorrectionHighlighter = null; 4441 } 4442 } 4443 4444 private static class ErrorPopup extends PopupWindow { 4445 private boolean mAbove = false; 4446 private final TextView mView; 4447 private int mPopupInlineErrorBackgroundId = 0; 4448 private int mPopupInlineErrorAboveBackgroundId = 0; 4449 4450 ErrorPopup(TextView v, int width, int height) { 4451 super(v, width, height); 4452 mView = v; 4453 // Make sure the TextView has a background set as it will be used the first time it is 4454 // shown and positioned. Initialized with below background, which should have 4455 // dimensions identical to the above version for this to work (and is more likely). 4456 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4457 com.android.internal.R.styleable.Theme_errorMessageBackground); 4458 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4459 } 4460 4461 void fixDirection(boolean above) { 4462 mAbove = above; 4463 4464 if (above) { 4465 mPopupInlineErrorAboveBackgroundId = 4466 getResourceId(mPopupInlineErrorAboveBackgroundId, 4467 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4468 } else { 4469 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4470 com.android.internal.R.styleable.Theme_errorMessageBackground); 4471 } 4472 4473 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4474 mPopupInlineErrorBackgroundId); 4475 } 4476 4477 private int getResourceId(int currentId, int index) { 4478 if (currentId == 0) { 4479 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4480 R.styleable.Theme); 4481 currentId = styledAttributes.getResourceId(index, 0); 4482 styledAttributes.recycle(); 4483 } 4484 return currentId; 4485 } 4486 4487 @Override 4488 public void update(int x, int y, int w, int h, boolean force) { 4489 super.update(x, y, w, h, force); 4490 4491 boolean above = isAboveAnchor(); 4492 if (above != mAbove) { 4493 fixDirection(above); 4494 } 4495 } 4496 } 4497 4498 static class InputContentType { 4499 int imeOptions = EditorInfo.IME_NULL; 4500 String privateImeOptions; 4501 CharSequence imeActionLabel; 4502 int imeActionId; 4503 Bundle extras; 4504 OnEditorActionListener onEditorActionListener; 4505 boolean enterDown; 4506 } 4507 4508 static class InputMethodState { 4509 Rect mCursorRectInWindow = new Rect(); 4510 float[] mTmpOffset = new float[2]; 4511 ExtractedTextRequest mExtractedTextRequest; 4512 final ExtractedText mExtractedText = new ExtractedText(); 4513 int mBatchEditNesting; 4514 boolean mCursorChanged; 4515 boolean mSelectionModeChanged; 4516 boolean mContentChanged; 4517 int mChangedStart, mChangedEnd, mChangedDelta; 4518 } 4519 4520 /** 4521 * @return True iff (start, end) is a valid range within the text. 4522 */ 4523 private static boolean isValidRange(CharSequence text, int start, int end) { 4524 return 0 <= start && start <= end && end <= text.length(); 4525 } 4526 4527 /** 4528 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4529 * text being typed (and hence always returns null from the filter() method). 4530 */ 4531 public static class UndoInputFilter implements InputFilter { 4532 private final Editor mEditor; 4533 4534 // Whether the current filter pass is directly caused by an end-user text edit. 4535 private boolean mIsUserEdit; 4536 4537 // Whether this is the first pass through the filter for a given end-user text edit. 4538 private boolean mFirstFilterPass; 4539 4540 public UndoInputFilter(Editor editor) { 4541 mEditor = editor; 4542 } 4543 4544 /** 4545 * Signals that a user-triggered edit is starting. 4546 */ 4547 public void beginBatchEdit() { 4548 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4549 mIsUserEdit = true; 4550 mFirstFilterPass = true; 4551 } 4552 4553 public void endBatchEdit() { 4554 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4555 mIsUserEdit = false; 4556 } 4557 4558 @Override 4559 public CharSequence filter(CharSequence source, int start, int end, 4560 Spanned dest, int dstart, int dend) { 4561 if (DEBUG_UNDO) { 4562 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4563 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4564 } 4565 4566 // Check to see if this edit should be tracked for undo. 4567 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4568 return null; 4569 } 4570 4571 // An application may install a TextWatcher to provide additional modifications after 4572 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4573 // string). This results in multiple filter() calls for what the user considers to be 4574 // a single operation. Always undo the whole set of changes in one step. 4575 final boolean forceMerge = !mFirstFilterPass; 4576 mFirstFilterPass = false; 4577 4578 // Build a new operation with all the information from this edit. 4579 EditOperation edit = new EditOperation(mEditor, forceMerge, 4580 source, start, end, dest, dstart, dend); 4581 4582 // Fetch the last edit operation and attempt to merge in the new edit. 4583 final UndoManager um = mEditor.mUndoManager; 4584 um.beginUpdate("Edit text"); 4585 EditOperation lastEdit = um.getLastOperation( 4586 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4587 if (lastEdit == null) { 4588 // Add this as the first edit. 4589 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4590 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4591 } else if (!mIsUserEdit) { 4592 // An application directly modified the Editable outside of a text edit. Treat this 4593 // as a new change and don't attempt to merge. 4594 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4595 um.commitState(mEditor.mUndoOwner); 4596 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4597 } else if (lastEdit.mergeWith(edit)) { 4598 // Merge succeeded, nothing else to do. 4599 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4600 } else { 4601 // Could not merge with the last edit, so commit the last edit and add this edit. 4602 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4603 um.commitState(mEditor.mUndoOwner); 4604 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4605 } 4606 um.endUpdate(); 4607 return null; // Text not changed. 4608 } 4609 4610 private boolean canUndoEdit(CharSequence source, int start, int end, 4611 Spanned dest, int dstart, int dend) { 4612 if (!mEditor.mAllowUndo) { 4613 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4614 return false; 4615 } 4616 4617 if (mEditor.mUndoManager.isInUndo()) { 4618 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4619 return false; 4620 } 4621 4622 // Text filters run before input operations are applied. However, some input operations 4623 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4624 // attempt to undo invalid operations. 4625 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4626 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4627 return false; 4628 } 4629 4630 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4631 // on an input field. Skip no-op changes. 4632 if (start == end && dstart == dend) { 4633 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4634 return false; 4635 } 4636 4637 return true; 4638 } 4639 } 4640 4641 /** 4642 * An operation to undo a single "edit" to a text view. 4643 */ 4644 public static class EditOperation extends UndoOperation<Editor> { 4645 private static final int TYPE_INSERT = 0; 4646 private static final int TYPE_DELETE = 1; 4647 private static final int TYPE_REPLACE = 2; 4648 4649 private int mType; 4650 private boolean mForceMerge; 4651 private String mOldText; 4652 private int mOldTextStart; 4653 private String mNewText; 4654 private int mNewTextStart; 4655 4656 private int mOldCursorPos; 4657 private int mNewCursorPos; 4658 4659 /** 4660 * Constructs an edit operation from a text input operation that replaces the range 4661 * (dstart, dend) of dest with (start, end) of source. See {@link InputFilter#filter}. 4662 * If forceMerge is true then always forcibly merge this operation with any previous one. 4663 */ 4664 public EditOperation(Editor editor, boolean forceMerge, 4665 CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { 4666 super(editor.mUndoOwner); 4667 mForceMerge = forceMerge; 4668 4669 mOldText = dest.subSequence(dstart, dend).toString(); 4670 mNewText = source.subSequence(start, end).toString(); 4671 4672 // Determine the type of the edit and store where it occurred. Avoid storing 4673 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4674 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4675 // outside the bounds of the final text). 4676 if (mNewText.length() > 0 && mOldText.length() == 0) { 4677 mType = TYPE_INSERT; 4678 mNewTextStart = dstart; 4679 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4680 mType = TYPE_DELETE; 4681 mOldTextStart = dstart; 4682 } else { 4683 mType = TYPE_REPLACE; 4684 mOldTextStart = mNewTextStart = dstart; 4685 } 4686 4687 // Store cursor data. 4688 mOldCursorPos = editor.mTextView.getSelectionStart(); 4689 mNewCursorPos = dstart + (end - start); 4690 } 4691 4692 public EditOperation(Parcel src, ClassLoader loader) { 4693 super(src, loader); 4694 mType = src.readInt(); 4695 mForceMerge = src.readInt() != 0; 4696 mOldText = src.readString(); 4697 mOldTextStart = src.readInt(); 4698 mNewText = src.readString(); 4699 mNewTextStart = src.readInt(); 4700 mOldCursorPos = src.readInt(); 4701 mNewCursorPos = src.readInt(); 4702 } 4703 4704 @Override 4705 public void writeToParcel(Parcel dest, int flags) { 4706 dest.writeInt(mType); 4707 dest.writeInt(mForceMerge ? 1 : 0); 4708 dest.writeString(mOldText); 4709 dest.writeInt(mOldTextStart); 4710 dest.writeString(mNewText); 4711 dest.writeInt(mNewTextStart); 4712 dest.writeInt(mOldCursorPos); 4713 dest.writeInt(mNewCursorPos); 4714 } 4715 4716 private int getNewTextEnd() { 4717 return mNewTextStart + mNewText.length(); 4718 } 4719 4720 private int getOldTextEnd() { 4721 return mOldTextStart + mOldText.length(); 4722 } 4723 4724 @Override 4725 public void commit() { 4726 } 4727 4728 @Override 4729 public void undo() { 4730 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4731 // Remove the new text and insert the old. 4732 Editor editor = getOwnerData(); 4733 Editable text = (Editable) editor.mTextView.getText(); 4734 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4735 mOldCursorPos); 4736 } 4737 4738 @Override 4739 public void redo() { 4740 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4741 // Remove the old text and insert the new. 4742 Editor editor = getOwnerData(); 4743 Editable text = (Editable) editor.mTextView.getText(); 4744 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4745 mNewCursorPos); 4746 } 4747 4748 /** 4749 * Attempts to merge this existing operation with a new edit. 4750 * @param edit The new edit operation. 4751 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4752 * object unchanged. 4753 */ 4754 private boolean mergeWith(EditOperation edit) { 4755 if (DEBUG_UNDO) { 4756 Log.d(TAG, "mergeWith old " + this); 4757 Log.d(TAG, "mergeWith new " + edit); 4758 } 4759 if (edit.mForceMerge) { 4760 forceMergeWith(edit); 4761 return true; 4762 } 4763 switch (mType) { 4764 case TYPE_INSERT: 4765 return mergeInsertWith(edit); 4766 case TYPE_DELETE: 4767 return mergeDeleteWith(edit); 4768 case TYPE_REPLACE: 4769 return mergeReplaceWith(edit); 4770 default: 4771 return false; 4772 } 4773 } 4774 4775 private boolean mergeInsertWith(EditOperation edit) { 4776 // Only merge continuous insertions. 4777 if (edit.mType != TYPE_INSERT) { 4778 return false; 4779 } 4780 // Only merge insertions that are contiguous. 4781 if (getNewTextEnd() != edit.mNewTextStart) { 4782 return false; 4783 } 4784 mNewText += edit.mNewText; 4785 mNewCursorPos = edit.mNewCursorPos; 4786 return true; 4787 } 4788 4789 // TODO: Support forward delete. 4790 private boolean mergeDeleteWith(EditOperation edit) { 4791 // Only merge continuous deletes. 4792 if (edit.mType != TYPE_DELETE) { 4793 return false; 4794 } 4795 // Only merge deletions that are contiguous. 4796 if (mOldTextStart != edit.getOldTextEnd()) { 4797 return false; 4798 } 4799 mOldTextStart = edit.mOldTextStart; 4800 mOldText = edit.mOldText + mOldText; 4801 mNewCursorPos = edit.mNewCursorPos; 4802 return true; 4803 } 4804 4805 private boolean mergeReplaceWith(EditOperation edit) { 4806 // Replacements can merge only with adjacent inserts. 4807 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 4808 return false; 4809 } 4810 mOldText += edit.mOldText; 4811 mNewText += edit.mNewText; 4812 mNewCursorPos = edit.mNewCursorPos; 4813 return true; 4814 } 4815 4816 /** 4817 * Forcibly creates a single merged edit operation by simulating the entire text 4818 * contents being replaced. 4819 */ 4820 private void forceMergeWith(EditOperation edit) { 4821 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 4822 Editor editor = getOwnerData(); 4823 4824 // Copy the text of the current field. 4825 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 4826 // but would require two parallel implementations of modifyText() because Editable and 4827 // StringBuilder do not share an interface for replace/delete/insert. 4828 Editable editable = (Editable) editor.mTextView.getText(); 4829 Editable originalText = new SpannableStringBuilder(editable.toString()); 4830 4831 // Roll back the last operation. 4832 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4833 mOldCursorPos); 4834 4835 // Clone the text again and apply the new operation. 4836 Editable finalText = new SpannableStringBuilder(editable.toString()); 4837 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 4838 edit.mNewTextStart, edit.mNewCursorPos); 4839 4840 // Convert this operation into a non-mergeable replacement of the entire string. 4841 mType = TYPE_REPLACE; 4842 mNewText = finalText.toString(); 4843 mNewTextStart = 0; 4844 mOldText = originalText.toString(); 4845 mOldTextStart = 0; 4846 mNewCursorPos = edit.mNewCursorPos; 4847 // mOldCursorPos is unchanged. 4848 } 4849 4850 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 4851 CharSequence newText, int newTextInsertAt, int newCursorPos) { 4852 // Apply the edit if it is still valid. 4853 if (isValidRange(text, deleteFrom, deleteTo) && 4854 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 4855 if (deleteFrom != deleteTo) { 4856 text.delete(deleteFrom, deleteTo); 4857 } 4858 if (newText.length() != 0) { 4859 text.insert(newTextInsertAt, newText); 4860 } 4861 } 4862 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 4863 // don't explicitly set it and rely on SpannableStringBuilder to position it. 4864 // TODO: Select all the text that was undone. 4865 if (0 <= newCursorPos && newCursorPos <= text.length()) { 4866 Selection.setSelection(text, newCursorPos); 4867 } 4868 } 4869 4870 private String getTypeString() { 4871 switch (mType) { 4872 case TYPE_INSERT: 4873 return "insert"; 4874 case TYPE_DELETE: 4875 return "delete"; 4876 case TYPE_REPLACE: 4877 return "replace"; 4878 default: 4879 return ""; 4880 } 4881 } 4882 4883 @Override 4884 public String toString() { 4885 return "[mType=" + getTypeString() + ", " + 4886 "mOldText=" + mOldText + ", " + 4887 "mOldTextStart=" + mOldTextStart + ", " + 4888 "mNewText=" + mNewText + ", " + 4889 "mNewTextStart=" + mNewTextStart + ", " + 4890 "mOldCursorPos=" + mOldCursorPos + ", " + 4891 "mNewCursorPos=" + mNewCursorPos + "]"; 4892 } 4893 4894 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 4895 = new Parcelable.ClassLoaderCreator<EditOperation>() { 4896 @Override 4897 public EditOperation createFromParcel(Parcel in) { 4898 return new EditOperation(in, null); 4899 } 4900 4901 @Override 4902 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 4903 return new EditOperation(in, loader); 4904 } 4905 4906 @Override 4907 public EditOperation[] newArray(int size) { 4908 return new EditOperation[size]; 4909 } 4910 }; 4911 } 4912} 4913