Editor.java revision 259292ff3de5b9a64e8e3bb4a62a533aef4125b7
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.Nullable; 21import android.app.PendingIntent; 22import android.app.PendingIntent.CanceledException; 23import android.content.ClipData; 24import android.content.ClipData.Item; 25import android.content.Context; 26import android.content.Intent; 27import android.content.UndoManager; 28import android.content.UndoOperation; 29import android.content.UndoOwner; 30import android.content.pm.PackageManager; 31import android.content.pm.ResolveInfo; 32import android.content.res.TypedArray; 33import android.graphics.Canvas; 34import android.graphics.Color; 35import android.graphics.Matrix; 36import android.graphics.Paint; 37import android.graphics.Path; 38import android.graphics.Rect; 39import android.graphics.RectF; 40import android.graphics.drawable.Drawable; 41import android.inputmethodservice.ExtractEditText; 42import android.os.Bundle; 43import android.os.Handler; 44import android.os.Parcel; 45import android.os.Parcelable; 46import android.os.ParcelableParcel; 47import android.os.SystemClock; 48import android.provider.Settings; 49import android.text.DynamicLayout; 50import android.text.Editable; 51import android.text.InputFilter; 52import android.text.InputType; 53import android.text.Layout; 54import android.text.ParcelableSpan; 55import android.text.Selection; 56import android.text.SpanWatcher; 57import android.text.Spannable; 58import android.text.SpannableStringBuilder; 59import android.text.Spanned; 60import android.text.StaticLayout; 61import android.text.TextUtils; 62import android.text.method.KeyListener; 63import android.text.method.MetaKeyKeyListener; 64import android.text.method.MovementMethod; 65import android.text.method.WordIterator; 66import android.text.style.EasyEditSpan; 67import android.text.style.SuggestionRangeSpan; 68import android.text.style.SuggestionSpan; 69import android.text.style.TextAppearanceSpan; 70import android.text.style.URLSpan; 71import android.util.DisplayMetrics; 72import android.util.Log; 73import android.view.ActionMode; 74import android.view.ActionMode.Callback; 75import android.view.DisplayListCanvas; 76import android.view.DragEvent; 77import android.view.Gravity; 78import android.view.LayoutInflater; 79import android.view.Menu; 80import android.view.MenuItem; 81import android.view.MotionEvent; 82import android.view.RenderNode; 83import android.view.View; 84import android.view.View.DragShadowBuilder; 85import android.view.View.OnClickListener; 86import android.view.ViewConfiguration; 87import android.view.ViewGroup; 88import android.view.ViewGroup.LayoutParams; 89import android.view.ViewParent; 90import android.view.ViewTreeObserver; 91import android.view.WindowManager; 92import android.view.inputmethod.CorrectionInfo; 93import android.view.inputmethod.CursorAnchorInfo; 94import android.view.inputmethod.EditorInfo; 95import android.view.inputmethod.ExtractedText; 96import android.view.inputmethod.ExtractedTextRequest; 97import android.view.inputmethod.InputConnection; 98import android.view.inputmethod.InputMethodManager; 99import android.widget.AdapterView.OnItemClickListener; 100import android.widget.TextView.Drawables; 101import android.widget.TextView.OnEditorActionListener; 102 103import com.android.internal.util.ArrayUtils; 104import com.android.internal.util.GrowingArrayUtils; 105import com.android.internal.widget.EditableInputConnection; 106 107import java.text.BreakIterator; 108import java.util.Arrays; 109import java.util.Comparator; 110import java.util.HashMap; 111import java.util.List; 112 113/** 114 * Helper class used by TextView to handle editable text views. 115 * 116 * @hide 117 */ 118public class Editor { 119 private static final String TAG = "Editor"; 120 private static final boolean DEBUG_UNDO = false; 121 122 static final int BLINK = 500; 123 private static final float[] TEMP_POSITION = new float[2]; 124 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 125 // Tag used when the Editor maintains its own separate UndoManager. 126 private static final String UNDO_OWNER_TAG = "Editor"; 127 128 // Each Editor manages its own undo stack. 129 private final UndoManager mUndoManager = new UndoManager(); 130 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 131 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 132 boolean mAllowUndo = true; 133 134 // Cursor Controllers. 135 InsertionPointCursorController mInsertionPointCursorController; 136 SelectionModifierCursorController mSelectionModifierCursorController; 137 ActionMode mSelectionActionMode; 138 boolean mInsertionControllerEnabled; 139 boolean mSelectionControllerEnabled; 140 141 // Used to highlight a word when it is corrected by the IME 142 CorrectionHighlighter mCorrectionHighlighter; 143 144 InputContentType mInputContentType; 145 InputMethodState mInputMethodState; 146 147 private static class TextRenderNode { 148 RenderNode renderNode; 149 boolean isDirty; 150 public TextRenderNode(String name) { 151 isDirty = true; 152 renderNode = RenderNode.create(name, null); 153 } 154 boolean needsRecord() { return isDirty || !renderNode.isValid(); } 155 } 156 TextRenderNode[] mTextRenderNodes; 157 158 boolean mFrozenWithFocus; 159 boolean mSelectionMoved; 160 boolean mTouchFocusSelected; 161 162 KeyListener mKeyListener; 163 int mInputType = EditorInfo.TYPE_NULL; 164 165 boolean mDiscardNextActionUp; 166 boolean mIgnoreActionUpEvent; 167 168 long mShowCursor; 169 Blink mBlink; 170 171 boolean mCursorVisible = true; 172 boolean mSelectAllOnFocus; 173 boolean mTextIsSelectable; 174 175 CharSequence mError; 176 boolean mErrorWasChanged; 177 ErrorPopup mErrorPopup; 178 179 /** 180 * This flag is set if the TextView tries to display an error before it 181 * is attached to the window (so its position is still unknown). 182 * It causes the error to be shown later, when onAttachedToWindow() 183 * is called. 184 */ 185 boolean mShowErrorAfterAttach; 186 187 boolean mInBatchEditControllers; 188 boolean mShowSoftInputOnFocus = true; 189 boolean mPreserveDetachedSelection; 190 boolean mTemporaryDetach; 191 192 SuggestionsPopupWindow mSuggestionsPopupWindow; 193 SuggestionRangeSpan mSuggestionRangeSpan; 194 Runnable mShowSuggestionRunnable; 195 196 final Drawable[] mCursorDrawable = new Drawable[2]; 197 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 198 199 private Drawable mSelectHandleLeft; 200 private Drawable mSelectHandleRight; 201 private Drawable mSelectHandleCenter; 202 203 // Global listener that detects changes in the global position of the TextView 204 private PositionListener mPositionListener; 205 206 float mLastDownPositionX, mLastDownPositionY; 207 Callback mCustomSelectionActionModeCallback; 208 209 // Set when this TextView gained focus with some text selected. Will start selection mode. 210 boolean mCreatedWithASelection; 211 212 boolean mDoubleTap = false; 213 214 private Runnable mSelectionModeWithoutSelectionRunnable; 215 216 // The span controller helps monitoring the changes to which the Editor needs to react: 217 // - EasyEditSpans, for which we have some UI to display on attach and on hide 218 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 219 private SpanController mSpanController; 220 221 WordIterator mWordIterator; 222 SpellChecker mSpellChecker; 223 224 // This word iterator is set with text and used to determine word boundaries 225 // when a user is selecting text. 226 private WordIterator mWordIteratorWithText; 227 // Indicate that the text in the word iterator needs to be updated. 228 private boolean mUpdateWordIteratorText; 229 230 private Rect mTempRect; 231 232 private TextView mTextView; 233 234 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 235 236 Editor(TextView textView) { 237 mTextView = textView; 238 // Synchronize the filter list, which places the undo input filter at the end. 239 mTextView.setFilters(mTextView.getFilters()); 240 } 241 242 ParcelableParcel saveInstanceState() { 243 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 244 Parcel parcel = state.getParcel(); 245 mUndoManager.saveInstanceState(parcel); 246 mUndoInputFilter.saveInstanceState(parcel); 247 return state; 248 } 249 250 void restoreInstanceState(ParcelableParcel state) { 251 Parcel parcel = state.getParcel(); 252 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 253 mUndoInputFilter.restoreInstanceState(parcel); 254 // Re-associate this object as the owner of undo state. 255 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 256 } 257 258 /** 259 * Forgets all undo and redo operations for this Editor. 260 */ 261 void forgetUndoRedo() { 262 UndoOwner[] owners = { mUndoOwner }; 263 mUndoManager.forgetUndos(owners, -1 /* all */); 264 mUndoManager.forgetRedos(owners, -1 /* all */); 265 } 266 267 boolean canUndo() { 268 UndoOwner[] owners = { mUndoOwner }; 269 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 270 } 271 272 boolean canRedo() { 273 UndoOwner[] owners = { mUndoOwner }; 274 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 275 } 276 277 void undo() { 278 if (!mAllowUndo) { 279 return; 280 } 281 UndoOwner[] owners = { mUndoOwner }; 282 mUndoManager.undo(owners, 1); // Undo 1 action. 283 } 284 285 void redo() { 286 if (!mAllowUndo) { 287 return; 288 } 289 UndoOwner[] owners = { mUndoOwner }; 290 mUndoManager.redo(owners, 1); // Redo 1 action. 291 } 292 293 void replace() { 294 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 295 stopSelectionActionMode(); 296 Selection.setSelection((Spannable) mTextView.getText(), middle); 297 showSuggestions(); 298 } 299 300 void onAttachedToWindow() { 301 if (mShowErrorAfterAttach) { 302 showError(); 303 mShowErrorAfterAttach = false; 304 } 305 mTemporaryDetach = false; 306 307 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 308 // No need to create the controller. 309 // The get method will add the listener on controller creation. 310 if (mInsertionPointCursorController != null) { 311 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 312 } 313 if (mSelectionModifierCursorController != null) { 314 mSelectionModifierCursorController.resetTouchOffsets(); 315 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 316 } 317 updateSpellCheckSpans(0, mTextView.getText().length(), 318 true /* create the spell checker if needed */); 319 320 if (mTextView.hasTransientState() && 321 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 322 // Since transient state is reference counted make sure it stays matched 323 // with our own calls to it for managing selection. 324 // The action mode callback will set this back again when/if the action mode starts. 325 mTextView.setHasTransientState(false); 326 327 // We had an active selection from before, start the selection mode. 328 startSelectionActionModeWithSelection(); 329 } 330 331 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 332 resumeBlink(); 333 } 334 335 void onDetachedFromWindow() { 336 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 337 338 if (mError != null) { 339 hideError(); 340 } 341 342 suspendBlink(); 343 344 if (mInsertionPointCursorController != null) { 345 mInsertionPointCursorController.onDetached(); 346 } 347 348 if (mSelectionModifierCursorController != null) { 349 mSelectionModifierCursorController.onDetached(); 350 } 351 352 if (mShowSuggestionRunnable != null) { 353 mTextView.removeCallbacks(mShowSuggestionRunnable); 354 } 355 356 // Cancel the single tap delayed runnable. 357 if (mSelectionModeWithoutSelectionRunnable != null) { 358 mTextView.removeCallbacks(mSelectionModeWithoutSelectionRunnable); 359 } 360 361 destroyDisplayListsData(); 362 363 if (mSpellChecker != null) { 364 mSpellChecker.closeSession(); 365 // Forces the creation of a new SpellChecker next time this window is created. 366 // Will handle the cases where the settings has been changed in the meantime. 367 mSpellChecker = null; 368 } 369 370 mPreserveDetachedSelection = true; 371 hideControllers(); 372 mPreserveDetachedSelection = false; 373 mTemporaryDetach = false; 374 } 375 376 private void destroyDisplayListsData() { 377 if (mTextRenderNodes != null) { 378 for (int i = 0; i < mTextRenderNodes.length; i++) { 379 RenderNode displayList = mTextRenderNodes[i] != null 380 ? mTextRenderNodes[i].renderNode : null; 381 if (displayList != null && displayList.isValid()) { 382 displayList.destroyDisplayListData(); 383 } 384 } 385 } 386 } 387 388 private void showError() { 389 if (mTextView.getWindowToken() == null) { 390 mShowErrorAfterAttach = true; 391 return; 392 } 393 394 if (mErrorPopup == null) { 395 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 396 final TextView err = (TextView) inflater.inflate( 397 com.android.internal.R.layout.textview_hint, null); 398 399 final float scale = mTextView.getResources().getDisplayMetrics().density; 400 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 401 mErrorPopup.setFocusable(false); 402 // The user is entering text, so the input method is needed. We 403 // don't want the popup to be displayed on top of it. 404 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 405 } 406 407 TextView tv = (TextView) mErrorPopup.getContentView(); 408 chooseSize(mErrorPopup, mError, tv); 409 tv.setText(mError); 410 411 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 412 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 413 } 414 415 public void setError(CharSequence error, Drawable icon) { 416 mError = TextUtils.stringOrSpannedString(error); 417 mErrorWasChanged = true; 418 419 if (mError == null) { 420 setErrorIcon(null); 421 if (mErrorPopup != null) { 422 if (mErrorPopup.isShowing()) { 423 mErrorPopup.dismiss(); 424 } 425 426 mErrorPopup = null; 427 } 428 mShowErrorAfterAttach = false; 429 } else { 430 setErrorIcon(icon); 431 if (mTextView.isFocused()) { 432 showError(); 433 } 434 } 435 } 436 437 private void setErrorIcon(Drawable icon) { 438 Drawables dr = mTextView.mDrawables; 439 if (dr == null) { 440 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 441 } 442 dr.setErrorDrawable(icon, mTextView); 443 444 mTextView.resetResolvedDrawables(); 445 mTextView.invalidate(); 446 mTextView.requestLayout(); 447 } 448 449 private void hideError() { 450 if (mErrorPopup != null) { 451 if (mErrorPopup.isShowing()) { 452 mErrorPopup.dismiss(); 453 } 454 } 455 456 mShowErrorAfterAttach = false; 457 } 458 459 /** 460 * Returns the X offset to make the pointy top of the error point 461 * at the middle of the error icon. 462 */ 463 private int getErrorX() { 464 /* 465 * The "25" is the distance between the point and the right edge 466 * of the background 467 */ 468 final float scale = mTextView.getResources().getDisplayMetrics().density; 469 470 final Drawables dr = mTextView.mDrawables; 471 472 final int layoutDirection = mTextView.getLayoutDirection(); 473 int errorX; 474 int offset; 475 switch (layoutDirection) { 476 default: 477 case View.LAYOUT_DIRECTION_LTR: 478 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 479 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 480 mTextView.getPaddingRight() + offset; 481 break; 482 case View.LAYOUT_DIRECTION_RTL: 483 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 484 errorX = mTextView.getPaddingLeft() + offset; 485 break; 486 } 487 return errorX; 488 } 489 490 /** 491 * Returns the Y offset to make the pointy top of the error point 492 * at the bottom of the error icon. 493 */ 494 private int getErrorY() { 495 /* 496 * Compound, not extended, because the icon is not clipped 497 * if the text height is smaller. 498 */ 499 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 500 int vspace = mTextView.getBottom() - mTextView.getTop() - 501 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 502 503 final Drawables dr = mTextView.mDrawables; 504 505 final int layoutDirection = mTextView.getLayoutDirection(); 506 int height; 507 switch (layoutDirection) { 508 default: 509 case View.LAYOUT_DIRECTION_LTR: 510 height = (dr != null ? dr.mDrawableHeightRight : 0); 511 break; 512 case View.LAYOUT_DIRECTION_RTL: 513 height = (dr != null ? dr.mDrawableHeightLeft : 0); 514 break; 515 } 516 517 int icontop = compoundPaddingTop + (vspace - height) / 2; 518 519 /* 520 * The "2" is the distance between the point and the top edge 521 * of the background. 522 */ 523 final float scale = mTextView.getResources().getDisplayMetrics().density; 524 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 525 } 526 527 void createInputContentTypeIfNeeded() { 528 if (mInputContentType == null) { 529 mInputContentType = new InputContentType(); 530 } 531 } 532 533 void createInputMethodStateIfNeeded() { 534 if (mInputMethodState == null) { 535 mInputMethodState = new InputMethodState(); 536 } 537 } 538 539 boolean isCursorVisible() { 540 // The default value is true, even when there is no associated Editor 541 return mCursorVisible && mTextView.isTextEditable(); 542 } 543 544 void prepareCursorControllers() { 545 boolean windowSupportsHandles = false; 546 547 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 548 if (params instanceof WindowManager.LayoutParams) { 549 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 550 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 551 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 552 } 553 554 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 555 mInsertionControllerEnabled = enabled && isCursorVisible(); 556 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 557 558 if (!mInsertionControllerEnabled) { 559 hideInsertionPointCursorController(); 560 if (mInsertionPointCursorController != null) { 561 mInsertionPointCursorController.onDetached(); 562 mInsertionPointCursorController = null; 563 } 564 } 565 566 if (!mSelectionControllerEnabled) { 567 stopSelectionActionMode(); 568 if (mSelectionModifierCursorController != null) { 569 mSelectionModifierCursorController.onDetached(); 570 mSelectionModifierCursorController = null; 571 } 572 } 573 } 574 575 void hideInsertionPointCursorController() { 576 if (mInsertionPointCursorController != null) { 577 mInsertionPointCursorController.hide(); 578 } 579 } 580 581 /** 582 * Hides the insertion controller and stops text selection mode, hiding the selection controller 583 */ 584 void hideControllers() { 585 hideCursorControllers(); 586 hideSpanControllers(); 587 } 588 589 private void hideSpanControllers() { 590 if (mSpanController != null) { 591 mSpanController.hide(); 592 } 593 } 594 595 private void hideCursorControllers() { 596 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 597 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 598 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 599 // to distinguish one from the other. 600 if (mSuggestionsPopupWindow != null && ((mTextView instanceof ExtractEditText) || 601 !mSuggestionsPopupWindow.isShowingUp())) { 602 // Should be done before hide insertion point controller since it triggers a show of it 603 mSuggestionsPopupWindow.hide(); 604 } 605 hideInsertionPointCursorController(); 606 stopSelectionActionMode(); 607 } 608 609 /** 610 * Create new SpellCheckSpans on the modified region. 611 */ 612 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 613 // Remove spans whose adjacent characters are text not punctuation 614 mTextView.removeAdjacentSuggestionSpans(start); 615 mTextView.removeAdjacentSuggestionSpans(end); 616 617 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 618 !(mTextView instanceof ExtractEditText)) { 619 if (mSpellChecker == null && createSpellChecker) { 620 mSpellChecker = new SpellChecker(mTextView); 621 } 622 if (mSpellChecker != null) { 623 mSpellChecker.spellCheck(start, end); 624 } 625 } 626 } 627 628 void onScreenStateChanged(int screenState) { 629 switch (screenState) { 630 case View.SCREEN_STATE_ON: 631 resumeBlink(); 632 break; 633 case View.SCREEN_STATE_OFF: 634 suspendBlink(); 635 break; 636 } 637 } 638 639 private void suspendBlink() { 640 if (mBlink != null) { 641 mBlink.cancel(); 642 } 643 } 644 645 private void resumeBlink() { 646 if (mBlink != null) { 647 mBlink.uncancel(); 648 makeBlink(); 649 } 650 } 651 652 void adjustInputType(boolean password, boolean passwordInputType, 653 boolean webPasswordInputType, boolean numberPasswordInputType) { 654 // mInputType has been set from inputType, possibly modified by mInputMethod. 655 // Specialize mInputType to [web]password if we have a text class and the original input 656 // type was a password. 657 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 658 if (password || passwordInputType) { 659 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 660 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 661 } 662 if (webPasswordInputType) { 663 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 664 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 665 } 666 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 667 if (numberPasswordInputType) { 668 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 669 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 670 } 671 } 672 } 673 674 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 675 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 676 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 677 678 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 679 com.android.internal.R.dimen.textview_error_popup_default_width); 680 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 681 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 682 float max = 0; 683 for (int i = 0; i < l.getLineCount(); i++) { 684 max = Math.max(max, l.getLineWidth(i)); 685 } 686 687 /* 688 * Now set the popup size to be big enough for the text plus the border capped 689 * to DEFAULT_MAX_POPUP_WIDTH 690 */ 691 pop.setWidth(wid + (int) Math.ceil(max)); 692 pop.setHeight(ht + l.getHeight()); 693 } 694 695 void setFrame() { 696 if (mErrorPopup != null) { 697 TextView tv = (TextView) mErrorPopup.getContentView(); 698 chooseSize(mErrorPopup, mError, tv); 699 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 700 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 701 } 702 } 703 704 private int getWordStart(int offset) { 705 // FIXME - For this and similar methods we're not doing anything to check if there's 706 // a LocaleSpan in the text, this may be something we should try handling or checking for. 707 int retOffset = getWordIteratorWithText().prevBoundary(offset); 708 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 709 // On punctuation boundary or within group of punctuation, find punctuation start. 710 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 711 } else { 712 // Not on a punctuation boundary, find the word start. 713 retOffset = getWordIteratorWithText().getBeginning(offset); 714 } 715 if (retOffset == BreakIterator.DONE) { 716 return offset; 717 } 718 return retOffset; 719 } 720 721 private int getWordEnd(int offset) { 722 int retOffset = getWordIteratorWithText().nextBoundary(offset); 723 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 724 // On punctuation boundary or within group of punctuation, find punctuation end. 725 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 726 } else { 727 // Not on a punctuation boundary, find the word end. 728 retOffset = getWordIteratorWithText().getEnd(offset); 729 } 730 if (retOffset == BreakIterator.DONE) { 731 return offset; 732 } 733 return retOffset; 734 } 735 736 /** 737 * Adjusts selection to the word under last touch offset. Return true if the operation was 738 * successfully performed. 739 */ 740 private boolean selectCurrentWord() { 741 if (!mTextView.canSelectText()) { 742 return false; 743 } 744 745 if (mTextView.hasPasswordTransformationMethod()) { 746 // Always select all on a password field. 747 // Cut/copy menu entries are not available for passwords, but being able to select all 748 // is however useful to delete or paste to replace the entire content. 749 return mTextView.selectAllText(); 750 } 751 752 int inputType = mTextView.getInputType(); 753 int klass = inputType & InputType.TYPE_MASK_CLASS; 754 int variation = inputType & InputType.TYPE_MASK_VARIATION; 755 756 // Specific text field types: select the entire text for these 757 if (klass == InputType.TYPE_CLASS_NUMBER || 758 klass == InputType.TYPE_CLASS_PHONE || 759 klass == InputType.TYPE_CLASS_DATETIME || 760 variation == InputType.TYPE_TEXT_VARIATION_URI || 761 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 762 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 763 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 764 return mTextView.selectAllText(); 765 } 766 767 long lastTouchOffsets = getLastTouchOffsets(); 768 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 769 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 770 771 // Safety check in case standard touch event handling has been bypassed 772 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 773 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 774 775 int selectionStart, selectionEnd; 776 777 // If a URLSpan (web address, email, phone...) is found at that position, select it. 778 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 779 getSpans(minOffset, maxOffset, URLSpan.class); 780 if (urlSpans.length >= 1) { 781 URLSpan urlSpan = urlSpans[0]; 782 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 783 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 784 } else { 785 // FIXME - We should check if there's a LocaleSpan in the text, this may be 786 // something we should try handling or checking for. 787 final WordIterator wordIterator = getWordIterator(); 788 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 789 790 selectionStart = wordIterator.getBeginning(minOffset); 791 selectionEnd = wordIterator.getEnd(maxOffset); 792 793 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 794 selectionStart == selectionEnd) { 795 // Possible when the word iterator does not properly handle the text's language 796 long range = getCharClusterRange(minOffset); 797 selectionStart = TextUtils.unpackRangeStartFromLong(range); 798 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 799 } 800 } 801 802 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 803 return selectionEnd > selectionStart; 804 } 805 806 void onLocaleChanged() { 807 // Will be re-created on demand in getWordIterator with the proper new locale 808 mWordIterator = null; 809 mWordIteratorWithText = null; 810 } 811 812 /** 813 * @hide 814 */ 815 public WordIterator getWordIterator() { 816 if (mWordIterator == null) { 817 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 818 } 819 return mWordIterator; 820 } 821 822 private WordIterator getWordIteratorWithText() { 823 if (mWordIteratorWithText == null) { 824 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 825 mUpdateWordIteratorText = true; 826 } 827 if (mUpdateWordIteratorText) { 828 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 829 // to the user's selection is needed. A possible solution would be to 830 // copy some number N of characters near the selection and then when the 831 // user approaches N then we'd do another copy of the next N characters. 832 CharSequence text = mTextView.getText(); 833 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 834 mUpdateWordIteratorText = false; 835 } 836 return mWordIteratorWithText; 837 } 838 839 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 840 final Layout layout = mTextView.getLayout(); 841 if (layout == null) return offset; 842 final CharSequence text = mTextView.getText(); 843 final int nextOffset = layout.getPaint().getTextRunCursor(text, 0, text.length(), 844 layout.isRtlCharAt(offset) ? Paint.DIRECTION_RTL : Paint.DIRECTION_LTR, 845 offset, findAfterGivenOffset ? Paint.CURSOR_AFTER : Paint.CURSOR_BEFORE); 846 return nextOffset == -1 ? offset : nextOffset; 847 } 848 849 private long getCharClusterRange(int offset) { 850 final int textLength = mTextView.getText().length(); 851 if (offset < textLength) { 852 return TextUtils.packRangeInLong(offset, getNextCursorOffset(offset, true)); 853 } 854 if (offset - 1 >= 0) { 855 return TextUtils.packRangeInLong(getNextCursorOffset(offset, false), offset); 856 } 857 return TextUtils.packRangeInLong(offset, offset); 858 } 859 860 private boolean touchPositionIsInSelection() { 861 int selectionStart = mTextView.getSelectionStart(); 862 int selectionEnd = mTextView.getSelectionEnd(); 863 864 if (selectionStart == selectionEnd) { 865 return false; 866 } 867 868 if (selectionStart > selectionEnd) { 869 int tmp = selectionStart; 870 selectionStart = selectionEnd; 871 selectionEnd = tmp; 872 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 873 } 874 875 SelectionModifierCursorController selectionController = getSelectionController(); 876 int minOffset = selectionController.getMinTouchOffset(); 877 int maxOffset = selectionController.getMaxTouchOffset(); 878 879 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 880 } 881 882 private PositionListener getPositionListener() { 883 if (mPositionListener == null) { 884 mPositionListener = new PositionListener(); 885 } 886 return mPositionListener; 887 } 888 889 private interface TextViewPositionListener { 890 public void updatePosition(int parentPositionX, int parentPositionY, 891 boolean parentPositionChanged, boolean parentScrolled); 892 } 893 894 private boolean isPositionVisible(final float positionX, final float positionY) { 895 synchronized (TEMP_POSITION) { 896 final float[] position = TEMP_POSITION; 897 position[0] = positionX; 898 position[1] = positionY; 899 View view = mTextView; 900 901 while (view != null) { 902 if (view != mTextView) { 903 // Local scroll is already taken into account in positionX/Y 904 position[0] -= view.getScrollX(); 905 position[1] -= view.getScrollY(); 906 } 907 908 if (position[0] < 0 || position[1] < 0 || 909 position[0] > view.getWidth() || position[1] > view.getHeight()) { 910 return false; 911 } 912 913 if (!view.getMatrix().isIdentity()) { 914 view.getMatrix().mapPoints(position); 915 } 916 917 position[0] += view.getLeft(); 918 position[1] += view.getTop(); 919 920 final ViewParent parent = view.getParent(); 921 if (parent instanceof View) { 922 view = (View) parent; 923 } else { 924 // We've reached the ViewRoot, stop iterating 925 view = null; 926 } 927 } 928 } 929 930 // We've been able to walk up the view hierarchy and the position was never clipped 931 return true; 932 } 933 934 private boolean isOffsetVisible(int offset) { 935 Layout layout = mTextView.getLayout(); 936 if (layout == null) return false; 937 938 final int line = layout.getLineForOffset(offset); 939 final int lineBottom = layout.getLineBottom(line); 940 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 941 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 942 lineBottom + mTextView.viewportToContentVerticalOffset()); 943 } 944 945 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 946 * in the view. Returns false when the position is in the empty space of left/right of text. 947 */ 948 private boolean isPositionOnText(float x, float y) { 949 Layout layout = mTextView.getLayout(); 950 if (layout == null) return false; 951 952 final int line = mTextView.getLineAtCoordinate(y); 953 x = mTextView.convertToLocalHorizontalCoordinate(x); 954 955 if (x < layout.getLineLeft(line)) return false; 956 if (x > layout.getLineRight(line)) return false; 957 return true; 958 } 959 960 public boolean performLongClick(boolean handled) { 961 // Long press in empty space moves cursor and starts the selection action mode. 962 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 963 mInsertionControllerEnabled) { 964 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 965 mLastDownPositionY); 966 stopSelectionActionMode(); 967 Selection.setSelection((Spannable) mTextView.getText(), offset); 968 getInsertionController().show(); 969 startSelectionActionModeWithoutSelection(); 970 handled = true; 971 } 972 973 if (!handled && mSelectionActionMode != null) { 974 if (touchPositionIsInSelection()) { 975 // Start a drag 976 final int start = mTextView.getSelectionStart(); 977 final int end = mTextView.getSelectionEnd(); 978 CharSequence selectedText = mTextView.getTransformedText(start, end); 979 ClipData data = ClipData.newPlainText(null, selectedText); 980 DragLocalState localState = new DragLocalState(mTextView, start, end); 981 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 982 View.DRAG_FLAG_GLOBAL); 983 stopSelectionActionMode(); 984 } else { 985 stopSelectionActionMode(); 986 startSelectionActionModeWithSelectionAndStartDrag(); 987 } 988 handled = true; 989 } 990 991 // Start a new selection 992 if (!handled) { 993 handled = startSelectionActionModeWithSelectionAndStartDrag(); 994 } 995 996 return handled; 997 } 998 999 private long getLastTouchOffsets() { 1000 SelectionModifierCursorController selectionController = getSelectionController(); 1001 final int minOffset = selectionController.getMinTouchOffset(); 1002 final int maxOffset = selectionController.getMaxTouchOffset(); 1003 return TextUtils.packRangeInLong(minOffset, maxOffset); 1004 } 1005 1006 void onFocusChanged(boolean focused, int direction) { 1007 mShowCursor = SystemClock.uptimeMillis(); 1008 ensureEndedBatchEdit(); 1009 1010 if (focused) { 1011 int selStart = mTextView.getSelectionStart(); 1012 int selEnd = mTextView.getSelectionEnd(); 1013 1014 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1015 // mode for these, unless there was a specific selection already started. 1016 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1017 selEnd == mTextView.getText().length(); 1018 1019 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1020 !isFocusHighlighted; 1021 1022 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1023 // If a tap was used to give focus to that view, move cursor at tap position. 1024 // Has to be done before onTakeFocus, which can be overloaded. 1025 final int lastTapPosition = getLastTapPosition(); 1026 if (lastTapPosition >= 0) { 1027 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1028 } 1029 1030 // Note this may have to be moved out of the Editor class 1031 MovementMethod mMovement = mTextView.getMovementMethod(); 1032 if (mMovement != null) { 1033 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1034 } 1035 1036 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1037 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1038 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1039 // This special case ensure that we keep current selection in that case. 1040 // It would be better to know why the DecorView does not have focus at that time. 1041 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1042 selStart >= 0 && selEnd >= 0) { 1043 /* 1044 * Someone intentionally set the selection, so let them 1045 * do whatever it is that they wanted to do instead of 1046 * the default on-focus behavior. We reset the selection 1047 * here instead of just skipping the onTakeFocus() call 1048 * because some movement methods do something other than 1049 * just setting the selection in theirs and we still 1050 * need to go through that path. 1051 */ 1052 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1053 } 1054 1055 if (mSelectAllOnFocus) { 1056 mTextView.selectAllText(); 1057 } 1058 1059 mTouchFocusSelected = true; 1060 } 1061 1062 mFrozenWithFocus = false; 1063 mSelectionMoved = false; 1064 1065 if (mError != null) { 1066 showError(); 1067 } 1068 1069 makeBlink(); 1070 } else { 1071 if (mError != null) { 1072 hideError(); 1073 } 1074 // Don't leave us in the middle of a batch edit. 1075 mTextView.onEndBatchEdit(); 1076 1077 if (mTextView instanceof ExtractEditText) { 1078 // terminateTextSelectionMode removes selection, which we want to keep when 1079 // ExtractEditText goes out of focus. 1080 final int selStart = mTextView.getSelectionStart(); 1081 final int selEnd = mTextView.getSelectionEnd(); 1082 hideControllers(); 1083 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1084 } else { 1085 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1086 hideControllers(); 1087 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1088 downgradeEasyCorrectionSpans(); 1089 } 1090 1091 // No need to create the controller 1092 if (mSelectionModifierCursorController != null) { 1093 mSelectionModifierCursorController.resetTouchOffsets(); 1094 } 1095 } 1096 } 1097 1098 /** 1099 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1100 * span. 1101 */ 1102 private void downgradeEasyCorrectionSpans() { 1103 CharSequence text = mTextView.getText(); 1104 if (text instanceof Spannable) { 1105 Spannable spannable = (Spannable) text; 1106 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1107 spannable.length(), SuggestionSpan.class); 1108 for (int i = 0; i < suggestionSpans.length; i++) { 1109 int flags = suggestionSpans[i].getFlags(); 1110 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1111 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1112 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1113 suggestionSpans[i].setFlags(flags); 1114 } 1115 } 1116 } 1117 } 1118 1119 void sendOnTextChanged(int start, int after) { 1120 updateSpellCheckSpans(start, start + after, false); 1121 1122 // Flip flag to indicate the word iterator needs to have the text reset. 1123 mUpdateWordIteratorText = true; 1124 1125 // Hide the controllers as soon as text is modified (typing, procedural...) 1126 // We do not hide the span controllers, since they can be added when a new text is 1127 // inserted into the text view (voice IME). 1128 hideCursorControllers(); 1129 } 1130 1131 private int getLastTapPosition() { 1132 // No need to create the controller at that point, no last tap position saved 1133 if (mSelectionModifierCursorController != null) { 1134 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1135 if (lastTapPosition >= 0) { 1136 // Safety check, should not be possible. 1137 if (lastTapPosition > mTextView.getText().length()) { 1138 lastTapPosition = mTextView.getText().length(); 1139 } 1140 return lastTapPosition; 1141 } 1142 } 1143 1144 return -1; 1145 } 1146 1147 void onWindowFocusChanged(boolean hasWindowFocus) { 1148 if (hasWindowFocus) { 1149 if (mBlink != null) { 1150 mBlink.uncancel(); 1151 makeBlink(); 1152 } 1153 } else { 1154 if (mBlink != null) { 1155 mBlink.cancel(); 1156 } 1157 if (mInputContentType != null) { 1158 mInputContentType.enterDown = false; 1159 } 1160 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1161 hideControllers(); 1162 if (mSuggestionsPopupWindow != null) { 1163 mSuggestionsPopupWindow.onParentLostFocus(); 1164 } 1165 1166 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1167 ensureEndedBatchEdit(); 1168 } 1169 } 1170 1171 void onTouchEvent(MotionEvent event) { 1172 if (hasSelectionController()) { 1173 getSelectionController().onTouchEvent(event); 1174 } 1175 1176 if (mShowSuggestionRunnable != null) { 1177 mTextView.removeCallbacks(mShowSuggestionRunnable); 1178 mShowSuggestionRunnable = null; 1179 } 1180 1181 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1182 mLastDownPositionX = event.getX(); 1183 mLastDownPositionY = event.getY(); 1184 1185 // Reset this state; it will be re-set if super.onTouchEvent 1186 // causes focus to move to the view. 1187 mTouchFocusSelected = false; 1188 mIgnoreActionUpEvent = false; 1189 } 1190 } 1191 1192 public void beginBatchEdit() { 1193 mInBatchEditControllers = true; 1194 final InputMethodState ims = mInputMethodState; 1195 if (ims != null) { 1196 int nesting = ++ims.mBatchEditNesting; 1197 if (nesting == 1) { 1198 ims.mCursorChanged = false; 1199 ims.mChangedDelta = 0; 1200 if (ims.mContentChanged) { 1201 // We already have a pending change from somewhere else, 1202 // so turn this into a full update. 1203 ims.mChangedStart = 0; 1204 ims.mChangedEnd = mTextView.getText().length(); 1205 } else { 1206 ims.mChangedStart = EXTRACT_UNKNOWN; 1207 ims.mChangedEnd = EXTRACT_UNKNOWN; 1208 ims.mContentChanged = false; 1209 } 1210 mUndoInputFilter.beginBatchEdit(); 1211 mTextView.onBeginBatchEdit(); 1212 } 1213 } 1214 } 1215 1216 public void endBatchEdit() { 1217 mInBatchEditControllers = false; 1218 final InputMethodState ims = mInputMethodState; 1219 if (ims != null) { 1220 int nesting = --ims.mBatchEditNesting; 1221 if (nesting == 0) { 1222 finishBatchEdit(ims); 1223 } 1224 } 1225 } 1226 1227 void ensureEndedBatchEdit() { 1228 final InputMethodState ims = mInputMethodState; 1229 if (ims != null && ims.mBatchEditNesting != 0) { 1230 ims.mBatchEditNesting = 0; 1231 finishBatchEdit(ims); 1232 } 1233 } 1234 1235 void finishBatchEdit(final InputMethodState ims) { 1236 mTextView.onEndBatchEdit(); 1237 mUndoInputFilter.endBatchEdit(); 1238 1239 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1240 mTextView.updateAfterEdit(); 1241 reportExtractedText(); 1242 } else if (ims.mCursorChanged) { 1243 // Cheesy way to get us to report the current cursor location. 1244 mTextView.invalidateCursor(); 1245 } 1246 // sendUpdateSelection knows to avoid sending if the selection did 1247 // not actually change. 1248 sendUpdateSelection(); 1249 } 1250 1251 static final int EXTRACT_NOTHING = -2; 1252 static final int EXTRACT_UNKNOWN = -1; 1253 1254 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1255 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1256 EXTRACT_UNKNOWN, outText); 1257 } 1258 1259 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1260 int partialStartOffset, int partialEndOffset, int delta, 1261 @Nullable ExtractedText outText) { 1262 if (request == null || outText == null) { 1263 return false; 1264 } 1265 1266 final CharSequence content = mTextView.getText(); 1267 if (content == null) { 1268 return false; 1269 } 1270 1271 if (partialStartOffset != EXTRACT_NOTHING) { 1272 final int N = content.length(); 1273 if (partialStartOffset < 0) { 1274 outText.partialStartOffset = outText.partialEndOffset = -1; 1275 partialStartOffset = 0; 1276 partialEndOffset = N; 1277 } else { 1278 // Now use the delta to determine the actual amount of text 1279 // we need. 1280 partialEndOffset += delta; 1281 // Adjust offsets to ensure we contain full spans. 1282 if (content instanceof Spanned) { 1283 Spanned spanned = (Spanned)content; 1284 Object[] spans = spanned.getSpans(partialStartOffset, 1285 partialEndOffset, ParcelableSpan.class); 1286 int i = spans.length; 1287 while (i > 0) { 1288 i--; 1289 int j = spanned.getSpanStart(spans[i]); 1290 if (j < partialStartOffset) partialStartOffset = j; 1291 j = spanned.getSpanEnd(spans[i]); 1292 if (j > partialEndOffset) partialEndOffset = j; 1293 } 1294 } 1295 outText.partialStartOffset = partialStartOffset; 1296 outText.partialEndOffset = partialEndOffset - delta; 1297 1298 if (partialStartOffset > N) { 1299 partialStartOffset = N; 1300 } else if (partialStartOffset < 0) { 1301 partialStartOffset = 0; 1302 } 1303 if (partialEndOffset > N) { 1304 partialEndOffset = N; 1305 } else if (partialEndOffset < 0) { 1306 partialEndOffset = 0; 1307 } 1308 } 1309 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1310 outText.text = content.subSequence(partialStartOffset, 1311 partialEndOffset); 1312 } else { 1313 outText.text = TextUtils.substring(content, partialStartOffset, 1314 partialEndOffset); 1315 } 1316 } else { 1317 outText.partialStartOffset = 0; 1318 outText.partialEndOffset = 0; 1319 outText.text = ""; 1320 } 1321 outText.flags = 0; 1322 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1323 outText.flags |= ExtractedText.FLAG_SELECTING; 1324 } 1325 if (mTextView.isSingleLine()) { 1326 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1327 } 1328 outText.startOffset = 0; 1329 outText.selectionStart = mTextView.getSelectionStart(); 1330 outText.selectionEnd = mTextView.getSelectionEnd(); 1331 return true; 1332 } 1333 1334 boolean reportExtractedText() { 1335 final Editor.InputMethodState ims = mInputMethodState; 1336 if (ims != null) { 1337 final boolean contentChanged = ims.mContentChanged; 1338 if (contentChanged || ims.mSelectionModeChanged) { 1339 ims.mContentChanged = false; 1340 ims.mSelectionModeChanged = false; 1341 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1342 if (req != null) { 1343 InputMethodManager imm = InputMethodManager.peekInstance(); 1344 if (imm != null) { 1345 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1346 "Retrieving extracted start=" + ims.mChangedStart + 1347 " end=" + ims.mChangedEnd + 1348 " delta=" + ims.mChangedDelta); 1349 if (ims.mChangedStart < 0 && !contentChanged) { 1350 ims.mChangedStart = EXTRACT_NOTHING; 1351 } 1352 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1353 ims.mChangedDelta, ims.mExtractedText)) { 1354 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1355 "Reporting extracted start=" + 1356 ims.mExtractedText.partialStartOffset + 1357 " end=" + ims.mExtractedText.partialEndOffset + 1358 ": " + ims.mExtractedText.text); 1359 1360 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1361 ims.mChangedStart = EXTRACT_UNKNOWN; 1362 ims.mChangedEnd = EXTRACT_UNKNOWN; 1363 ims.mChangedDelta = 0; 1364 ims.mContentChanged = false; 1365 return true; 1366 } 1367 } 1368 } 1369 } 1370 } 1371 return false; 1372 } 1373 1374 private void sendUpdateSelection() { 1375 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1376 final InputMethodManager imm = InputMethodManager.peekInstance(); 1377 if (null != imm) { 1378 final int selectionStart = mTextView.getSelectionStart(); 1379 final int selectionEnd = mTextView.getSelectionEnd(); 1380 int candStart = -1; 1381 int candEnd = -1; 1382 if (mTextView.getText() instanceof Spannable) { 1383 final Spannable sp = (Spannable) mTextView.getText(); 1384 candStart = EditableInputConnection.getComposingSpanStart(sp); 1385 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1386 } 1387 // InputMethodManager#updateSelection skips sending the message if 1388 // none of the parameters have changed since the last time we called it. 1389 imm.updateSelection(mTextView, 1390 selectionStart, selectionEnd, candStart, candEnd); 1391 } 1392 } 1393 } 1394 1395 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1396 int cursorOffsetVertical) { 1397 final int selectionStart = mTextView.getSelectionStart(); 1398 final int selectionEnd = mTextView.getSelectionEnd(); 1399 1400 final InputMethodState ims = mInputMethodState; 1401 if (ims != null && ims.mBatchEditNesting == 0) { 1402 InputMethodManager imm = InputMethodManager.peekInstance(); 1403 if (imm != null) { 1404 if (imm.isActive(mTextView)) { 1405 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1406 // We are in extract mode and the content has changed 1407 // in some way... just report complete new text to the 1408 // input method. 1409 reportExtractedText(); 1410 } 1411 } 1412 } 1413 } 1414 1415 if (mCorrectionHighlighter != null) { 1416 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1417 } 1418 1419 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1420 drawCursor(canvas, cursorOffsetVertical); 1421 // Rely on the drawable entirely, do not draw the cursor line. 1422 // Has to be done after the IMM related code above which relies on the highlight. 1423 highlight = null; 1424 } 1425 1426 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1427 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1428 cursorOffsetVertical); 1429 } else { 1430 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1431 } 1432 } 1433 1434 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1435 Paint highlightPaint, int cursorOffsetVertical) { 1436 final long lineRange = layout.getLineRangeForDraw(canvas); 1437 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1438 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1439 if (lastLine < 0) return; 1440 1441 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1442 firstLine, lastLine); 1443 1444 if (layout instanceof DynamicLayout) { 1445 if (mTextRenderNodes == null) { 1446 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1447 } 1448 1449 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1450 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1451 int[] blockIndices = dynamicLayout.getBlockIndices(); 1452 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1453 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1454 1455 int endOfPreviousBlock = -1; 1456 int searchStartIndex = 0; 1457 for (int i = 0; i < numberOfBlocks; i++) { 1458 int blockEndLine = blockEndLines[i]; 1459 int blockIndex = blockIndices[i]; 1460 1461 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1462 if (blockIsInvalid) { 1463 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1464 searchStartIndex); 1465 // Note how dynamic layout's internal block indices get updated from Editor 1466 blockIndices[i] = blockIndex; 1467 if (mTextRenderNodes[blockIndex] != null) { 1468 mTextRenderNodes[blockIndex].isDirty = true; 1469 } 1470 searchStartIndex = blockIndex + 1; 1471 } 1472 1473 if (mTextRenderNodes[blockIndex] == null) { 1474 mTextRenderNodes[blockIndex] = 1475 new TextRenderNode("Text " + blockIndex); 1476 } 1477 1478 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1479 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1480 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1481 final int blockBeginLine = endOfPreviousBlock + 1; 1482 final int top = layout.getLineTop(blockBeginLine); 1483 final int bottom = layout.getLineBottom(blockEndLine); 1484 int left = 0; 1485 int right = mTextView.getWidth(); 1486 if (mTextView.getHorizontallyScrolling()) { 1487 float min = Float.MAX_VALUE; 1488 float max = Float.MIN_VALUE; 1489 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1490 min = Math.min(min, layout.getLineLeft(line)); 1491 max = Math.max(max, layout.getLineRight(line)); 1492 } 1493 left = (int) min; 1494 right = (int) (max + 0.5f); 1495 } 1496 1497 // Rebuild display list if it is invalid 1498 if (blockDisplayListIsInvalid) { 1499 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1500 right - left, bottom - top); 1501 try { 1502 // drawText is always relative to TextView's origin, this translation 1503 // brings this range of text back to the top left corner of the viewport 1504 displayListCanvas.translate(-left, -top); 1505 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1506 mTextRenderNodes[blockIndex].isDirty = false; 1507 // No need to untranslate, previous context is popped after 1508 // drawDisplayList 1509 } finally { 1510 blockDisplayList.end(displayListCanvas); 1511 // Same as drawDisplayList below, handled by our TextView's parent 1512 blockDisplayList.setClipToBounds(false); 1513 } 1514 } 1515 1516 // Valid disply list whose index is >= indexFirstChangedBlock 1517 // only needs to update its drawing location. 1518 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1519 } 1520 1521 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1522 1523 endOfPreviousBlock = blockEndLine; 1524 } 1525 1526 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1527 } else { 1528 // Boring layout is used for empty and hint text 1529 layout.drawText(canvas, firstLine, lastLine); 1530 } 1531 } 1532 1533 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1534 int searchStartIndex) { 1535 int length = mTextRenderNodes.length; 1536 for (int i = searchStartIndex; i < length; i++) { 1537 boolean blockIndexFound = false; 1538 for (int j = 0; j < numberOfBlocks; j++) { 1539 if (blockIndices[j] == i) { 1540 blockIndexFound = true; 1541 break; 1542 } 1543 } 1544 if (blockIndexFound) continue; 1545 return i; 1546 } 1547 1548 // No available index found, the pool has to grow 1549 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1550 return length; 1551 } 1552 1553 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1554 final boolean translate = cursorOffsetVertical != 0; 1555 if (translate) canvas.translate(0, cursorOffsetVertical); 1556 for (int i = 0; i < mCursorCount; i++) { 1557 mCursorDrawable[i].draw(canvas); 1558 } 1559 if (translate) canvas.translate(0, -cursorOffsetVertical); 1560 } 1561 1562 /** 1563 * Invalidates all the sub-display lists that overlap the specified character range 1564 */ 1565 void invalidateTextDisplayList(Layout layout, int start, int end) { 1566 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1567 final int firstLine = layout.getLineForOffset(start); 1568 final int lastLine = layout.getLineForOffset(end); 1569 1570 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1571 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1572 int[] blockIndices = dynamicLayout.getBlockIndices(); 1573 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1574 1575 int i = 0; 1576 // Skip the blocks before firstLine 1577 while (i < numberOfBlocks) { 1578 if (blockEndLines[i] >= firstLine) break; 1579 i++; 1580 } 1581 1582 // Invalidate all subsequent blocks until lastLine is passed 1583 while (i < numberOfBlocks) { 1584 final int blockIndex = blockIndices[i]; 1585 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1586 mTextRenderNodes[blockIndex].isDirty = true; 1587 } 1588 if (blockEndLines[i] >= lastLine) break; 1589 i++; 1590 } 1591 } 1592 } 1593 1594 void invalidateTextDisplayList() { 1595 if (mTextRenderNodes != null) { 1596 for (int i = 0; i < mTextRenderNodes.length; i++) { 1597 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1598 } 1599 } 1600 } 1601 1602 void updateCursorsPositions() { 1603 if (mTextView.mCursorDrawableRes == 0) { 1604 mCursorCount = 0; 1605 return; 1606 } 1607 1608 Layout layout = mTextView.getLayout(); 1609 Layout hintLayout = mTextView.getHintLayout(); 1610 final int offset = mTextView.getSelectionStart(); 1611 final int line = layout.getLineForOffset(offset); 1612 final int top = layout.getLineTop(line); 1613 final int bottom = layout.getLineTop(line + 1); 1614 1615 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1616 1617 int middle = bottom; 1618 if (mCursorCount == 2) { 1619 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1620 middle = (top + bottom) >> 1; 1621 } 1622 1623 boolean clamped = layout.shouldClampCursor(line); 1624 updateCursorPosition(0, top, middle, 1625 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1626 1627 if (mCursorCount == 2) { 1628 updateCursorPosition(1, middle, bottom, 1629 layout.getSecondaryHorizontal(offset, clamped)); 1630 } 1631 } 1632 1633 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1634 boolean clamped) { 1635 if (TextUtils.isEmpty(layout.getText()) && 1636 hintLayout != null && 1637 !TextUtils.isEmpty(hintLayout.getText())) { 1638 return hintLayout.getPrimaryHorizontal(offset, clamped); 1639 } else { 1640 return layout.getPrimaryHorizontal(offset, clamped); 1641 } 1642 } 1643 1644 /** 1645 * @return true if the selection mode was actually started. 1646 */ 1647 private boolean startSelectionActionModeWithoutSelection() { 1648 if (mSelectionActionMode != null) { 1649 // Selection action mode is already started 1650 // TODO: revisit invocations to minimize this case. 1651 mSelectionActionMode.invalidate(); 1652 return false; 1653 } 1654 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1655 mSelectionActionMode = mTextView.startActionMode( 1656 actionModeCallback, ActionMode.TYPE_FLOATING); 1657 return mSelectionActionMode != null; 1658 } 1659 1660 /** 1661 * Starts a Selection Action Mode with the current selection and enters drag mode. This should 1662 * be used whenever the mode is started from a touch event. 1663 * 1664 * @return true if the selection mode was actually started. 1665 */ 1666 private boolean startSelectionActionModeWithSelectionAndStartDrag() { 1667 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1668 if (selectionStarted) { 1669 getSelectionController().enterDrag(); 1670 } 1671 return selectionStarted; 1672 } 1673 1674 /** 1675 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1676 * are shown. This should be used when the mode is started from a non-touch event. 1677 * 1678 * @return true if the selection mode was actually started. 1679 */ 1680 boolean startSelectionActionModeWithSelection() { 1681 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1682 if (selectionStarted) { 1683 getSelectionController().show(); 1684 } 1685 return selectionStarted; 1686 } 1687 1688 private boolean startSelectionActionModeWithSelectionInternal() { 1689 if (mSelectionActionMode != null) { 1690 // Selection action mode is already started 1691 mSelectionActionMode.invalidate(); 1692 return false; 1693 } 1694 1695 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1696 Log.w(TextView.LOG_TAG, 1697 "TextView does not support text selection. Action mode cancelled."); 1698 return false; 1699 } 1700 1701 if (!mTextView.hasSelection()) { 1702 // There may already be a selection on device rotation 1703 if (!selectCurrentWord()) { 1704 // No word found under cursor or text selection not permitted. 1705 return false; 1706 } 1707 } 1708 1709 boolean willExtract = extractedTextModeWillBeStarted(); 1710 1711 // Do not start the action mode when extracted text will show up full screen, which would 1712 // immediately hide the newly created action bar and would be visually distracting. 1713 if (!willExtract) { 1714 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1715 mSelectionActionMode = mTextView.startActionMode( 1716 actionModeCallback, ActionMode.TYPE_FLOATING); 1717 } 1718 1719 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1720 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1721 // Show the IME to be able to replace text, except when selecting non editable text. 1722 final InputMethodManager imm = InputMethodManager.peekInstance(); 1723 if (imm != null) { 1724 imm.showSoftInput(mTextView, 0, null); 1725 } 1726 } 1727 return selectionStarted; 1728 } 1729 1730 private boolean extractedTextModeWillBeStarted() { 1731 if (!(mTextView instanceof ExtractEditText)) { 1732 final InputMethodManager imm = InputMethodManager.peekInstance(); 1733 return imm != null && imm.isFullscreenMode(); 1734 } 1735 return false; 1736 } 1737 1738 /** 1739 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1740 * the current cursor position or selection range. This method is consistent with the 1741 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1742 */ 1743 private boolean shouldOfferToShowSuggestions() { 1744 CharSequence text = mTextView.getText(); 1745 if (!(text instanceof Spannable)) return false; 1746 1747 final Spannable spannable = (Spannable) text; 1748 final int selectionStart = mTextView.getSelectionStart(); 1749 final int selectionEnd = mTextView.getSelectionEnd(); 1750 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1751 SuggestionSpan.class); 1752 if (suggestionSpans.length == 0) { 1753 return false; 1754 } 1755 if (selectionStart == selectionEnd) { 1756 // Spans overlap the cursor. 1757 return true; 1758 } 1759 int minSpanStart = mTextView.getText().length(); 1760 int maxSpanEnd = 0; 1761 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1762 int unionOfSpansCoveringSelectionStartEnd = 0; 1763 for (int i = 0; i < suggestionSpans.length; i++) { 1764 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1765 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1766 minSpanStart = Math.min(minSpanStart, spanStart); 1767 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1768 if (selectionStart < spanStart || selectionStart > spanEnd) { 1769 // The span doesn't cover the current selection start point. 1770 continue; 1771 } 1772 unionOfSpansCoveringSelectionStartStart = 1773 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1774 unionOfSpansCoveringSelectionStartEnd = 1775 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1776 } 1777 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1778 // No spans cover the selection start point. 1779 return false; 1780 } 1781 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1782 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1783 // There is a span that is not covered by the union. In this case, we soouldn't offer 1784 // to show suggestions as it's confusing. 1785 return false; 1786 } 1787 return true; 1788 } 1789 1790 /** 1791 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1792 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1793 */ 1794 private boolean isCursorInsideEasyCorrectionSpan() { 1795 Spannable spannable = (Spannable) mTextView.getText(); 1796 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1797 mTextView.getSelectionEnd(), SuggestionSpan.class); 1798 for (int i = 0; i < suggestionSpans.length; i++) { 1799 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1800 return true; 1801 } 1802 } 1803 return false; 1804 } 1805 1806 void onTouchUpEvent(MotionEvent event) { 1807 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1808 hideControllers(); 1809 CharSequence text = mTextView.getText(); 1810 if (!selectAllGotFocus && text.length() > 0) { 1811 // Move cursor 1812 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1813 Selection.setSelection((Spannable) text, offset); 1814 if (mSpellChecker != null) { 1815 // When the cursor moves, the word that was typed may need spell check 1816 mSpellChecker.onSelectionChanged(); 1817 } 1818 1819 if (!extractedTextModeWillBeStarted()) { 1820 if (isCursorInsideEasyCorrectionSpan()) { 1821 mShowSuggestionRunnable = new Runnable() { 1822 public void run() { 1823 showSuggestions(); 1824 } 1825 }; 1826 // removeCallbacks is performed on every touch 1827 mTextView.postDelayed(mShowSuggestionRunnable, 1828 ViewConfiguration.getDoubleTapTimeout()); 1829 } else if (hasInsertionController()) { 1830 getInsertionController().show(); 1831 } 1832 } 1833 } 1834 } 1835 1836 protected void stopSelectionActionMode() { 1837 if (mSelectionActionMode != null) { 1838 // This will hide the mSelectionModifierCursorController 1839 mSelectionActionMode.finish(); 1840 } 1841 } 1842 1843 /** 1844 * @return True if this view supports insertion handles. 1845 */ 1846 boolean hasInsertionController() { 1847 return mInsertionControllerEnabled; 1848 } 1849 1850 /** 1851 * @return True if this view supports selection handles. 1852 */ 1853 boolean hasSelectionController() { 1854 return mSelectionControllerEnabled; 1855 } 1856 1857 InsertionPointCursorController getInsertionController() { 1858 if (!mInsertionControllerEnabled) { 1859 return null; 1860 } 1861 1862 if (mInsertionPointCursorController == null) { 1863 mInsertionPointCursorController = new InsertionPointCursorController(); 1864 1865 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1866 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1867 } 1868 1869 return mInsertionPointCursorController; 1870 } 1871 1872 SelectionModifierCursorController getSelectionController() { 1873 if (!mSelectionControllerEnabled) { 1874 return null; 1875 } 1876 1877 if (mSelectionModifierCursorController == null) { 1878 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1879 1880 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1881 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1882 } 1883 1884 return mSelectionModifierCursorController; 1885 } 1886 1887 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1888 if (mCursorDrawable[cursorIndex] == null) 1889 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1890 mTextView.mCursorDrawableRes); 1891 1892 if (mTempRect == null) mTempRect = new Rect(); 1893 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1894 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1895 horizontal = Math.max(0.5f, horizontal - 0.5f); 1896 final int left = (int) (horizontal) - mTempRect.left; 1897 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1898 bottom + mTempRect.bottom); 1899 } 1900 1901 /** 1902 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1903 * a dictionary) from the current input method, provided by it calling 1904 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1905 * implementation flashes the background of the corrected word to provide feedback to the user. 1906 * 1907 * @param info The auto correct info about the text that was corrected. 1908 */ 1909 public void onCommitCorrection(CorrectionInfo info) { 1910 if (mCorrectionHighlighter == null) { 1911 mCorrectionHighlighter = new CorrectionHighlighter(); 1912 } else { 1913 mCorrectionHighlighter.invalidate(false); 1914 } 1915 1916 mCorrectionHighlighter.highlight(info); 1917 } 1918 1919 void showSuggestions() { 1920 if (mSuggestionsPopupWindow == null) { 1921 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1922 } 1923 hideControllers(); 1924 mSuggestionsPopupWindow.show(); 1925 } 1926 1927 void onScrollChanged() { 1928 if (mPositionListener != null) { 1929 mPositionListener.onScrollChanged(); 1930 } 1931 if (mSelectionActionMode != null) { 1932 mSelectionActionMode.invalidateContentRect(); 1933 } 1934 } 1935 1936 /** 1937 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 1938 */ 1939 private boolean shouldBlink() { 1940 if (!isCursorVisible() || !mTextView.isFocused()) return false; 1941 1942 final int start = mTextView.getSelectionStart(); 1943 if (start < 0) return false; 1944 1945 final int end = mTextView.getSelectionEnd(); 1946 if (end < 0) return false; 1947 1948 return start == end; 1949 } 1950 1951 void makeBlink() { 1952 if (shouldBlink()) { 1953 mShowCursor = SystemClock.uptimeMillis(); 1954 if (mBlink == null) mBlink = new Blink(); 1955 mBlink.removeCallbacks(mBlink); 1956 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 1957 } else { 1958 if (mBlink != null) mBlink.removeCallbacks(mBlink); 1959 } 1960 } 1961 1962 private class Blink extends Handler implements Runnable { 1963 private boolean mCancelled; 1964 1965 public void run() { 1966 if (mCancelled) { 1967 return; 1968 } 1969 1970 removeCallbacks(Blink.this); 1971 1972 if (shouldBlink()) { 1973 if (mTextView.getLayout() != null) { 1974 mTextView.invalidateCursorPath(); 1975 } 1976 1977 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 1978 } 1979 } 1980 1981 void cancel() { 1982 if (!mCancelled) { 1983 removeCallbacks(Blink.this); 1984 mCancelled = true; 1985 } 1986 } 1987 1988 void uncancel() { 1989 mCancelled = false; 1990 } 1991 } 1992 1993 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 1994 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 1995 com.android.internal.R.layout.text_drag_thumbnail, null); 1996 1997 if (shadowView == null) { 1998 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 1999 } 2000 2001 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2002 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2003 } 2004 shadowView.setText(text); 2005 shadowView.setTextColor(mTextView.getTextColors()); 2006 2007 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2008 shadowView.setGravity(Gravity.CENTER); 2009 2010 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2011 ViewGroup.LayoutParams.WRAP_CONTENT)); 2012 2013 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2014 shadowView.measure(size, size); 2015 2016 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2017 shadowView.invalidate(); 2018 return new DragShadowBuilder(shadowView); 2019 } 2020 2021 private static class DragLocalState { 2022 public TextView sourceTextView; 2023 public int start, end; 2024 2025 public DragLocalState(TextView sourceTextView, int start, int end) { 2026 this.sourceTextView = sourceTextView; 2027 this.start = start; 2028 this.end = end; 2029 } 2030 } 2031 2032 void onDrop(DragEvent event) { 2033 StringBuilder content = new StringBuilder(""); 2034 ClipData clipData = event.getClipData(); 2035 final int itemCount = clipData.getItemCount(); 2036 for (int i=0; i < itemCount; i++) { 2037 Item item = clipData.getItemAt(i); 2038 content.append(item.coerceToStyledText(mTextView.getContext())); 2039 } 2040 2041 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2042 2043 Object localState = event.getLocalState(); 2044 DragLocalState dragLocalState = null; 2045 if (localState instanceof DragLocalState) { 2046 dragLocalState = (DragLocalState) localState; 2047 } 2048 boolean dragDropIntoItself = dragLocalState != null && 2049 dragLocalState.sourceTextView == mTextView; 2050 2051 if (dragDropIntoItself) { 2052 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2053 // A drop inside the original selection discards the drop. 2054 return; 2055 } 2056 } 2057 2058 final int originalLength = mTextView.getText().length(); 2059 int min = offset; 2060 int max = offset; 2061 2062 Selection.setSelection((Spannable) mTextView.getText(), max); 2063 mTextView.replaceText_internal(min, max, content); 2064 2065 if (dragDropIntoItself) { 2066 int dragSourceStart = dragLocalState.start; 2067 int dragSourceEnd = dragLocalState.end; 2068 if (max <= dragSourceStart) { 2069 // Inserting text before selection has shifted positions 2070 final int shift = mTextView.getText().length() - originalLength; 2071 dragSourceStart += shift; 2072 dragSourceEnd += shift; 2073 } 2074 2075 // Delete original selection 2076 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2077 2078 // Make sure we do not leave two adjacent spaces. 2079 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2080 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2081 if (nextCharIdx > prevCharIdx + 1) { 2082 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2083 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2084 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2085 } 2086 } 2087 } 2088 } 2089 2090 public void addSpanWatchers(Spannable text) { 2091 final int textLength = text.length(); 2092 2093 if (mKeyListener != null) { 2094 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2095 } 2096 2097 if (mSpanController == null) { 2098 mSpanController = new SpanController(); 2099 } 2100 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2101 } 2102 2103 /** 2104 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2105 * pop-up should be displayed. 2106 * Also monitors {@link Selection} to call back to the attached input method. 2107 */ 2108 class SpanController implements SpanWatcher { 2109 2110 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2111 2112 private EasyEditPopupWindow mPopupWindow; 2113 2114 private Runnable mHidePopup; 2115 2116 // This function is pure but inner classes can't have static functions 2117 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2118 final Object span) { 2119 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2120 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2121 } 2122 2123 @Override 2124 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2125 if (isNonIntermediateSelectionSpan(text, span)) { 2126 sendUpdateSelection(); 2127 } else if (span instanceof EasyEditSpan) { 2128 if (mPopupWindow == null) { 2129 mPopupWindow = new EasyEditPopupWindow(); 2130 mHidePopup = new Runnable() { 2131 @Override 2132 public void run() { 2133 hide(); 2134 } 2135 }; 2136 } 2137 2138 // Make sure there is only at most one EasyEditSpan in the text 2139 if (mPopupWindow.mEasyEditSpan != null) { 2140 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2141 } 2142 2143 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2144 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2145 @Override 2146 public void onDeleteClick(EasyEditSpan span) { 2147 Editable editable = (Editable) mTextView.getText(); 2148 int start = editable.getSpanStart(span); 2149 int end = editable.getSpanEnd(span); 2150 if (start >= 0 && end >= 0) { 2151 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2152 mTextView.deleteText_internal(start, end); 2153 } 2154 editable.removeSpan(span); 2155 } 2156 }); 2157 2158 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2159 // The window is not visible yet, ignore the text change. 2160 return; 2161 } 2162 2163 if (mTextView.getLayout() == null) { 2164 // The view has not been laid out yet, ignore the text change 2165 return; 2166 } 2167 2168 if (extractedTextModeWillBeStarted()) { 2169 // The input is in extract mode. Do not handle the easy edit in 2170 // the original TextView, as the ExtractEditText will do 2171 return; 2172 } 2173 2174 mPopupWindow.show(); 2175 mTextView.removeCallbacks(mHidePopup); 2176 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2177 } 2178 } 2179 2180 @Override 2181 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2182 if (isNonIntermediateSelectionSpan(text, span)) { 2183 sendUpdateSelection(); 2184 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2185 hide(); 2186 } 2187 } 2188 2189 @Override 2190 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2191 int newStart, int newEnd) { 2192 if (isNonIntermediateSelectionSpan(text, span)) { 2193 sendUpdateSelection(); 2194 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2195 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2196 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2197 text.removeSpan(easyEditSpan); 2198 } 2199 } 2200 2201 public void hide() { 2202 if (mPopupWindow != null) { 2203 mPopupWindow.hide(); 2204 mTextView.removeCallbacks(mHidePopup); 2205 } 2206 } 2207 2208 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2209 try { 2210 PendingIntent pendingIntent = span.getPendingIntent(); 2211 if (pendingIntent != null) { 2212 Intent intent = new Intent(); 2213 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2214 pendingIntent.send(mTextView.getContext(), 0, intent); 2215 } 2216 } catch (CanceledException e) { 2217 // This should not happen, as we should try to send the intent only once. 2218 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2219 } 2220 } 2221 } 2222 2223 /** 2224 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2225 */ 2226 private interface EasyEditDeleteListener { 2227 2228 /** 2229 * Clicks the delete pop-up. 2230 */ 2231 void onDeleteClick(EasyEditSpan span); 2232 } 2233 2234 /** 2235 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2236 * by {@link SpanController}. 2237 */ 2238 private class EasyEditPopupWindow extends PinnedPopupWindow 2239 implements OnClickListener { 2240 private static final int POPUP_TEXT_LAYOUT = 2241 com.android.internal.R.layout.text_edit_action_popup_text; 2242 private TextView mDeleteTextView; 2243 private EasyEditSpan mEasyEditSpan; 2244 private EasyEditDeleteListener mOnDeleteListener; 2245 2246 @Override 2247 protected void createPopupWindow() { 2248 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2249 com.android.internal.R.attr.textSelectHandleWindowStyle); 2250 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2251 mPopupWindow.setClippingEnabled(true); 2252 } 2253 2254 @Override 2255 protected void initContentView() { 2256 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2257 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2258 mContentView = linearLayout; 2259 mContentView.setBackgroundResource( 2260 com.android.internal.R.drawable.text_edit_side_paste_window); 2261 2262 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2263 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2264 2265 LayoutParams wrapContent = new LayoutParams( 2266 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2267 2268 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2269 mDeleteTextView.setLayoutParams(wrapContent); 2270 mDeleteTextView.setText(com.android.internal.R.string.delete); 2271 mDeleteTextView.setOnClickListener(this); 2272 mContentView.addView(mDeleteTextView); 2273 } 2274 2275 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2276 mEasyEditSpan = easyEditSpan; 2277 } 2278 2279 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2280 mOnDeleteListener = listener; 2281 } 2282 2283 @Override 2284 public void onClick(View view) { 2285 if (view == mDeleteTextView 2286 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2287 && mOnDeleteListener != null) { 2288 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2289 } 2290 } 2291 2292 @Override 2293 public void hide() { 2294 if (mEasyEditSpan != null) { 2295 mEasyEditSpan.setDeleteEnabled(false); 2296 } 2297 mOnDeleteListener = null; 2298 super.hide(); 2299 } 2300 2301 @Override 2302 protected int getTextOffset() { 2303 // Place the pop-up at the end of the span 2304 Editable editable = (Editable) mTextView.getText(); 2305 return editable.getSpanEnd(mEasyEditSpan); 2306 } 2307 2308 @Override 2309 protected int getVerticalLocalPosition(int line) { 2310 return mTextView.getLayout().getLineBottom(line); 2311 } 2312 2313 @Override 2314 protected int clipVertically(int positionY) { 2315 // As we display the pop-up below the span, no vertical clipping is required. 2316 return positionY; 2317 } 2318 } 2319 2320 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2321 // 3 handles 2322 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2323 // 1 CursorAnchorInfoNotifier 2324 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2325 private TextViewPositionListener[] mPositionListeners = 2326 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2327 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2328 private boolean mPositionHasChanged = true; 2329 // Absolute position of the TextView with respect to its parent window 2330 private int mPositionX, mPositionY; 2331 private int mNumberOfListeners; 2332 private boolean mScrollHasChanged; 2333 final int[] mTempCoords = new int[2]; 2334 2335 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2336 if (mNumberOfListeners == 0) { 2337 updatePosition(); 2338 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2339 vto.addOnPreDrawListener(this); 2340 } 2341 2342 int emptySlotIndex = -1; 2343 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2344 TextViewPositionListener listener = mPositionListeners[i]; 2345 if (listener == positionListener) { 2346 return; 2347 } else if (emptySlotIndex < 0 && listener == null) { 2348 emptySlotIndex = i; 2349 } 2350 } 2351 2352 mPositionListeners[emptySlotIndex] = positionListener; 2353 mCanMove[emptySlotIndex] = canMove; 2354 mNumberOfListeners++; 2355 } 2356 2357 public void removeSubscriber(TextViewPositionListener positionListener) { 2358 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2359 if (mPositionListeners[i] == positionListener) { 2360 mPositionListeners[i] = null; 2361 mNumberOfListeners--; 2362 break; 2363 } 2364 } 2365 2366 if (mNumberOfListeners == 0) { 2367 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2368 vto.removeOnPreDrawListener(this); 2369 } 2370 } 2371 2372 public int getPositionX() { 2373 return mPositionX; 2374 } 2375 2376 public int getPositionY() { 2377 return mPositionY; 2378 } 2379 2380 @Override 2381 public boolean onPreDraw() { 2382 updatePosition(); 2383 2384 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2385 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2386 TextViewPositionListener positionListener = mPositionListeners[i]; 2387 if (positionListener != null) { 2388 positionListener.updatePosition(mPositionX, mPositionY, 2389 mPositionHasChanged, mScrollHasChanged); 2390 } 2391 } 2392 } 2393 2394 mScrollHasChanged = false; 2395 return true; 2396 } 2397 2398 private void updatePosition() { 2399 mTextView.getLocationInWindow(mTempCoords); 2400 2401 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2402 2403 mPositionX = mTempCoords[0]; 2404 mPositionY = mTempCoords[1]; 2405 } 2406 2407 public void onScrollChanged() { 2408 mScrollHasChanged = true; 2409 } 2410 } 2411 2412 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2413 protected PopupWindow mPopupWindow; 2414 protected ViewGroup mContentView; 2415 int mPositionX, mPositionY; 2416 2417 protected abstract void createPopupWindow(); 2418 protected abstract void initContentView(); 2419 protected abstract int getTextOffset(); 2420 protected abstract int getVerticalLocalPosition(int line); 2421 protected abstract int clipVertically(int positionY); 2422 2423 public PinnedPopupWindow() { 2424 createPopupWindow(); 2425 2426 mPopupWindow.setWindowLayoutType( 2427 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2428 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2429 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2430 2431 initContentView(); 2432 2433 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2434 ViewGroup.LayoutParams.WRAP_CONTENT); 2435 mContentView.setLayoutParams(wrapContent); 2436 2437 mPopupWindow.setContentView(mContentView); 2438 } 2439 2440 public void show() { 2441 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2442 2443 computeLocalPosition(); 2444 2445 final PositionListener positionListener = getPositionListener(); 2446 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2447 } 2448 2449 protected void measureContent() { 2450 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2451 mContentView.measure( 2452 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2453 View.MeasureSpec.AT_MOST), 2454 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2455 View.MeasureSpec.AT_MOST)); 2456 } 2457 2458 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2459 * positioned according to viewportToContentHorizontalOffset. 2460 * 2461 * This method assumes that mContentView has properly been measured from its content. */ 2462 private void computeLocalPosition() { 2463 measureContent(); 2464 final int width = mContentView.getMeasuredWidth(); 2465 final int offset = getTextOffset(); 2466 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2467 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2468 2469 final int line = mTextView.getLayout().getLineForOffset(offset); 2470 mPositionY = getVerticalLocalPosition(line); 2471 mPositionY += mTextView.viewportToContentVerticalOffset(); 2472 } 2473 2474 private void updatePosition(int parentPositionX, int parentPositionY) { 2475 int positionX = parentPositionX + mPositionX; 2476 int positionY = parentPositionY + mPositionY; 2477 2478 positionY = clipVertically(positionY); 2479 2480 // Horizontal clipping 2481 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2482 final int width = mContentView.getMeasuredWidth(); 2483 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2484 positionX = Math.max(0, positionX); 2485 2486 if (isShowing()) { 2487 mPopupWindow.update(positionX, positionY, -1, -1); 2488 } else { 2489 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2490 positionX, positionY); 2491 } 2492 } 2493 2494 public void hide() { 2495 mPopupWindow.dismiss(); 2496 getPositionListener().removeSubscriber(this); 2497 } 2498 2499 @Override 2500 public void updatePosition(int parentPositionX, int parentPositionY, 2501 boolean parentPositionChanged, boolean parentScrolled) { 2502 // Either parentPositionChanged or parentScrolled is true, check if still visible 2503 if (isShowing() && isOffsetVisible(getTextOffset())) { 2504 if (parentScrolled) computeLocalPosition(); 2505 updatePosition(parentPositionX, parentPositionY); 2506 } else { 2507 hide(); 2508 } 2509 } 2510 2511 public boolean isShowing() { 2512 return mPopupWindow.isShowing(); 2513 } 2514 } 2515 2516 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2517 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2518 private static final int ADD_TO_DICTIONARY = -1; 2519 private static final int DELETE_TEXT = -2; 2520 private SuggestionInfo[] mSuggestionInfos; 2521 private int mNumberOfSuggestions; 2522 private boolean mCursorWasVisibleBeforeSuggestions; 2523 private boolean mIsShowingUp = false; 2524 private SuggestionAdapter mSuggestionsAdapter; 2525 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2526 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2527 2528 private class CustomPopupWindow extends PopupWindow { 2529 public CustomPopupWindow(Context context, int defStyleAttr) { 2530 super(context, null, defStyleAttr); 2531 } 2532 2533 @Override 2534 public void dismiss() { 2535 super.dismiss(); 2536 2537 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2538 2539 // Safe cast since show() checks that mTextView.getText() is an Editable 2540 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2541 2542 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2543 if (hasInsertionController()) { 2544 getInsertionController().show(); 2545 } 2546 } 2547 } 2548 2549 public SuggestionsPopupWindow() { 2550 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2551 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2552 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2553 } 2554 2555 @Override 2556 protected void createPopupWindow() { 2557 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2558 com.android.internal.R.attr.textSuggestionsWindowStyle); 2559 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2560 mPopupWindow.setFocusable(true); 2561 mPopupWindow.setClippingEnabled(false); 2562 } 2563 2564 @Override 2565 protected void initContentView() { 2566 ListView listView = new ListView(mTextView.getContext()); 2567 mSuggestionsAdapter = new SuggestionAdapter(); 2568 listView.setAdapter(mSuggestionsAdapter); 2569 listView.setOnItemClickListener(this); 2570 mContentView = listView; 2571 2572 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2573 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2574 for (int i = 0; i < mSuggestionInfos.length; i++) { 2575 mSuggestionInfos[i] = new SuggestionInfo(); 2576 } 2577 } 2578 2579 public boolean isShowingUp() { 2580 return mIsShowingUp; 2581 } 2582 2583 public void onParentLostFocus() { 2584 mIsShowingUp = false; 2585 } 2586 2587 private class SuggestionInfo { 2588 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2589 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2590 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2591 SpannableStringBuilder text = new SpannableStringBuilder(); 2592 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2593 android.R.style.TextAppearance_SuggestionHighlight); 2594 } 2595 2596 private class SuggestionAdapter extends BaseAdapter { 2597 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2598 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2599 2600 @Override 2601 public int getCount() { 2602 return mNumberOfSuggestions; 2603 } 2604 2605 @Override 2606 public Object getItem(int position) { 2607 return mSuggestionInfos[position]; 2608 } 2609 2610 @Override 2611 public long getItemId(int position) { 2612 return position; 2613 } 2614 2615 @Override 2616 public View getView(int position, View convertView, ViewGroup parent) { 2617 TextView textView = (TextView) convertView; 2618 2619 if (textView == null) { 2620 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2621 parent, false); 2622 } 2623 2624 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2625 textView.setText(suggestionInfo.text); 2626 2627 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2628 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2629 textView.setBackgroundColor(Color.TRANSPARENT); 2630 } else { 2631 textView.setBackgroundColor(Color.WHITE); 2632 } 2633 2634 return textView; 2635 } 2636 } 2637 2638 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2639 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2640 final int flag1 = span1.getFlags(); 2641 final int flag2 = span2.getFlags(); 2642 if (flag1 != flag2) { 2643 // The order here should match what is used in updateDrawState 2644 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2645 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2646 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2647 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2648 if (easy1 && !misspelled1) return -1; 2649 if (easy2 && !misspelled2) return 1; 2650 if (misspelled1) return -1; 2651 if (misspelled2) return 1; 2652 } 2653 2654 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2655 } 2656 } 2657 2658 /** 2659 * Returns the suggestion spans that cover the current cursor position. The suggestion 2660 * spans are sorted according to the length of text that they are attached to. 2661 */ 2662 private SuggestionSpan[] getSuggestionSpans() { 2663 int pos = mTextView.getSelectionStart(); 2664 Spannable spannable = (Spannable) mTextView.getText(); 2665 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2666 2667 mSpansLengths.clear(); 2668 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2669 int start = spannable.getSpanStart(suggestionSpan); 2670 int end = spannable.getSpanEnd(suggestionSpan); 2671 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2672 } 2673 2674 // The suggestions are sorted according to their types (easy correction first, then 2675 // misspelled) and to the length of the text that they cover (shorter first). 2676 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2677 return suggestionSpans; 2678 } 2679 2680 @Override 2681 public void show() { 2682 if (!(mTextView.getText() instanceof Editable)) return; 2683 2684 if (updateSuggestions()) { 2685 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2686 mTextView.setCursorVisible(false); 2687 mIsShowingUp = true; 2688 super.show(); 2689 } 2690 } 2691 2692 @Override 2693 protected void measureContent() { 2694 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2695 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2696 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2697 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2698 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2699 2700 int width = 0; 2701 View view = null; 2702 for (int i = 0; i < mNumberOfSuggestions; i++) { 2703 view = mSuggestionsAdapter.getView(i, view, mContentView); 2704 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2705 view.measure(horizontalMeasure, verticalMeasure); 2706 width = Math.max(width, view.getMeasuredWidth()); 2707 } 2708 2709 // Enforce the width based on actual text widths 2710 mContentView.measure( 2711 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2712 verticalMeasure); 2713 2714 Drawable popupBackground = mPopupWindow.getBackground(); 2715 if (popupBackground != null) { 2716 if (mTempRect == null) mTempRect = new Rect(); 2717 popupBackground.getPadding(mTempRect); 2718 width += mTempRect.left + mTempRect.right; 2719 } 2720 mPopupWindow.setWidth(width); 2721 } 2722 2723 @Override 2724 protected int getTextOffset() { 2725 return mTextView.getSelectionStart(); 2726 } 2727 2728 @Override 2729 protected int getVerticalLocalPosition(int line) { 2730 return mTextView.getLayout().getLineBottom(line); 2731 } 2732 2733 @Override 2734 protected int clipVertically(int positionY) { 2735 final int height = mContentView.getMeasuredHeight(); 2736 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2737 return Math.min(positionY, displayMetrics.heightPixels - height); 2738 } 2739 2740 @Override 2741 public void hide() { 2742 super.hide(); 2743 } 2744 2745 private boolean updateSuggestions() { 2746 Spannable spannable = (Spannable) mTextView.getText(); 2747 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2748 2749 final int nbSpans = suggestionSpans.length; 2750 // Suggestions are shown after a delay: the underlying spans may have been removed 2751 if (nbSpans == 0) return false; 2752 2753 mNumberOfSuggestions = 0; 2754 int spanUnionStart = mTextView.getText().length(); 2755 int spanUnionEnd = 0; 2756 2757 SuggestionSpan misspelledSpan = null; 2758 int underlineColor = 0; 2759 2760 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2761 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2762 final int spanStart = spannable.getSpanStart(suggestionSpan); 2763 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2764 spanUnionStart = Math.min(spanStart, spanUnionStart); 2765 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2766 2767 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2768 misspelledSpan = suggestionSpan; 2769 } 2770 2771 // The first span dictates the background color of the highlighted text 2772 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2773 2774 String[] suggestions = suggestionSpan.getSuggestions(); 2775 int nbSuggestions = suggestions.length; 2776 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2777 String suggestion = suggestions[suggestionIndex]; 2778 2779 boolean suggestionIsDuplicate = false; 2780 for (int i = 0; i < mNumberOfSuggestions; i++) { 2781 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2782 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2783 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2784 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2785 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2786 suggestionIsDuplicate = true; 2787 break; 2788 } 2789 } 2790 } 2791 2792 if (!suggestionIsDuplicate) { 2793 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2794 suggestionInfo.suggestionSpan = suggestionSpan; 2795 suggestionInfo.suggestionIndex = suggestionIndex; 2796 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2797 2798 mNumberOfSuggestions++; 2799 2800 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2801 // Also end outer for loop 2802 spanIndex = nbSpans; 2803 break; 2804 } 2805 } 2806 } 2807 } 2808 2809 for (int i = 0; i < mNumberOfSuggestions; i++) { 2810 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2811 } 2812 2813 // Add "Add to dictionary" item if there is a span with the misspelled flag 2814 if (misspelledSpan != null) { 2815 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2816 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2817 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2818 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2819 suggestionInfo.suggestionSpan = misspelledSpan; 2820 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2821 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2822 getContext().getString(com.android.internal.R.string.addToDictionary)); 2823 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2824 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2825 2826 mNumberOfSuggestions++; 2827 } 2828 } 2829 2830 // Delete item 2831 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2832 suggestionInfo.suggestionSpan = null; 2833 suggestionInfo.suggestionIndex = DELETE_TEXT; 2834 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2835 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2836 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2837 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2838 mNumberOfSuggestions++; 2839 2840 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2841 if (underlineColor == 0) { 2842 // Fallback on the default highlight color when the first span does not provide one 2843 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2844 } else { 2845 final float BACKGROUND_TRANSPARENCY = 0.4f; 2846 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2847 mSuggestionRangeSpan.setBackgroundColor( 2848 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2849 } 2850 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2851 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2852 2853 mSuggestionsAdapter.notifyDataSetChanged(); 2854 return true; 2855 } 2856 2857 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2858 int unionEnd) { 2859 final Spannable text = (Spannable) mTextView.getText(); 2860 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2861 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2862 2863 // Adjust the start/end of the suggestion span 2864 suggestionInfo.suggestionStart = spanStart - unionStart; 2865 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2866 + suggestionInfo.text.length(); 2867 2868 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2869 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2870 2871 // Add the text before and after the span. 2872 final String textAsString = text.toString(); 2873 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2874 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2875 } 2876 2877 @Override 2878 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2879 Editable editable = (Editable) mTextView.getText(); 2880 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2881 2882 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2883 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2884 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2885 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2886 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2887 if (spanUnionEnd < editable.length() && 2888 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2889 (spanUnionStart == 0 || 2890 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2891 spanUnionEnd = spanUnionEnd + 1; 2892 } 2893 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2894 } 2895 hide(); 2896 return; 2897 } 2898 2899 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2900 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2901 if (spanStart < 0 || spanEnd <= spanStart) { 2902 // Span has been removed 2903 hide(); 2904 return; 2905 } 2906 2907 final String originalText = editable.toString().substring(spanStart, spanEnd); 2908 2909 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2910 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2911 intent.putExtra("word", originalText); 2912 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2913 // Put a listener to replace the original text with a word which the user 2914 // modified in a user dictionary dialog. 2915 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2916 mTextView.getContext().startActivity(intent); 2917 // There is no way to know if the word was indeed added. Re-check. 2918 // TODO The ExtractEditText should remove the span in the original text instead 2919 editable.removeSpan(suggestionInfo.suggestionSpan); 2920 Selection.setSelection(editable, spanEnd); 2921 updateSpellCheckSpans(spanStart, spanEnd, false); 2922 } else { 2923 // SuggestionSpans are removed by replace: save them before 2924 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2925 SuggestionSpan.class); 2926 final int length = suggestionSpans.length; 2927 int[] suggestionSpansStarts = new int[length]; 2928 int[] suggestionSpansEnds = new int[length]; 2929 int[] suggestionSpansFlags = new int[length]; 2930 for (int i = 0; i < length; i++) { 2931 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2932 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2933 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2934 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2935 2936 // Remove potential misspelled flags 2937 int suggestionSpanFlags = suggestionSpan.getFlags(); 2938 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 2939 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2940 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2941 suggestionSpan.setFlags(suggestionSpanFlags); 2942 } 2943 } 2944 2945 final int suggestionStart = suggestionInfo.suggestionStart; 2946 final int suggestionEnd = suggestionInfo.suggestionEnd; 2947 final String suggestion = suggestionInfo.text.subSequence( 2948 suggestionStart, suggestionEnd).toString(); 2949 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2950 2951 // Notify source IME of the suggestion pick. Do this before 2952 // swaping texts. 2953 suggestionInfo.suggestionSpan.notifySelection( 2954 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 2955 2956 // Swap text content between actual text and Suggestion span 2957 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 2958 suggestions[suggestionInfo.suggestionIndex] = originalText; 2959 2960 // Restore previous SuggestionSpans 2961 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 2962 for (int i = 0; i < length; i++) { 2963 // Only spans that include the modified region make sense after replacement 2964 // Spans partially included in the replaced region are removed, there is no 2965 // way to assign them a valid range after replacement 2966 if (suggestionSpansStarts[i] <= spanStart && 2967 suggestionSpansEnds[i] >= spanEnd) { 2968 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2969 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 2970 } 2971 } 2972 2973 // Move cursor at the end of the replaced word 2974 final int newCursorPosition = spanEnd + lengthDifference; 2975 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2976 } 2977 2978 hide(); 2979 } 2980 } 2981 2982 /** 2983 * An ActionMode Callback class that is used to provide actions while in text selection mode. 2984 * 2985 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 2986 * on which of these this TextView supports. 2987 */ 2988 private class SelectionActionModeCallback extends ActionMode.Callback2 { 2989 private final Path mSelectionPath = new Path(); 2990 private final RectF mSelectionBounds = new RectF(); 2991 2992 private int mSelectionHandleHeight; 2993 private int mInsertionHandleHeight; 2994 2995 public SelectionActionModeCallback() { 2996 SelectionModifierCursorController selectionController = getSelectionController(); 2997 if (selectionController.mStartHandle == null) { 2998 // As these are for initializing selectionController, hide() must be called. 2999 selectionController.initDrawables(); 3000 selectionController.initHandles(); 3001 selectionController.hide(); 3002 } 3003 mSelectionHandleHeight = Math.max( 3004 mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight()); 3005 InsertionPointCursorController insertionController = getInsertionController(); 3006 if (insertionController != null) { 3007 insertionController.getHandle(); 3008 mInsertionHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3009 } 3010 } 3011 3012 @Override 3013 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3014 mode.setTitle(mTextView.getContext().getString( 3015 com.android.internal.R.string.textSelectionCABTitle)); 3016 mode.setSubtitle(null); 3017 mode.setTitleOptionalHint(true); 3018 populateMenuWithItems(menu); 3019 3020 if (mCustomSelectionActionModeCallback != null) { 3021 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 3022 // The custom mode can choose to cancel the action mode 3023 return false; 3024 } 3025 } 3026 3027 addIntentMenuItemsForTextProcessing(menu); 3028 3029 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3030 mTextView.setHasTransientState(true); 3031 return true; 3032 } else { 3033 return false; 3034 } 3035 } 3036 3037 private void populateMenuWithItems(Menu menu) { 3038 if (mTextView.canCut()) { 3039 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 3040 setAlphabeticShortcut('x'). 3041 setShowAsAction( 3042 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3043 } 3044 3045 if (mTextView.canCopy()) { 3046 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 3047 setAlphabeticShortcut('c'). 3048 setShowAsAction( 3049 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3050 } 3051 3052 if (mTextView.canPaste()) { 3053 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 3054 setAlphabeticShortcut('v'). 3055 setShowAsAction( 3056 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3057 } 3058 3059 if (mTextView.canShare()) { 3060 menu.add(0, TextView.ID_SHARE, 0, com.android.internal.R.string.share). 3061 setShowAsAction( 3062 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3063 } 3064 3065 if (mTextView.canSelectAllText()) { 3066 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 3067 setAlphabeticShortcut('a'). 3068 setShowAsAction( 3069 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3070 } 3071 3072 updateReplaceItem(menu); 3073 } 3074 3075 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3076 if (mTextView.canProcessText()) { 3077 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3078 List<ResolveInfo> supportedActivities = 3079 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3080 for (ResolveInfo info : supportedActivities) { 3081 menu.add(info.loadLabel(packageManager)) 3082 .setIntent(createProcessTextIntentForResolveInfo(info)) 3083 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM 3084 | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3085 } 3086 } 3087 } 3088 3089 private Intent createProcessTextIntent() { 3090 return new Intent() 3091 .setAction(Intent.ACTION_PROCESS_TEXT) 3092 .setType("text/plain"); 3093 } 3094 3095 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3096 return createProcessTextIntent() 3097 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3098 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3099 } 3100 3101 @Override 3102 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3103 updateReplaceItem(menu); 3104 3105 if (mCustomSelectionActionModeCallback != null) { 3106 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3107 } 3108 return true; 3109 } 3110 3111 private void updateReplaceItem(Menu menu) { 3112 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3113 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3114 if (canReplace && !replaceItemExists) { 3115 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 3116 setShowAsAction( 3117 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3118 } else if (!canReplace && replaceItemExists) { 3119 menu.removeItem(TextView.ID_REPLACE); 3120 } 3121 } 3122 3123 @Override 3124 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3125 if (item.getIntent() != null 3126 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3127 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3128 mPreserveDetachedSelection = true; 3129 mTextView.startActivityForResult( 3130 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3131 return true; 3132 } 3133 if (mCustomSelectionActionModeCallback != null && 3134 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3135 return true; 3136 } 3137 return mTextView.onTextContextMenuItem(item.getItemId()); 3138 } 3139 3140 @Override 3141 public void onDestroyActionMode(ActionMode mode) { 3142 if (mCustomSelectionActionModeCallback != null) { 3143 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3144 } 3145 3146 /* 3147 * If we're ending this mode because we're detaching from a window, 3148 * we still have selection state to preserve. Don't clear it, we'll 3149 * bring back the selection mode when (if) we get reattached. 3150 */ 3151 if (!mPreserveDetachedSelection) { 3152 Selection.setSelection((Spannable) mTextView.getText(), 3153 mTextView.getSelectionEnd()); 3154 mTextView.setHasTransientState(false); 3155 } 3156 3157 if (mSelectionModifierCursorController != null) { 3158 mSelectionModifierCursorController.hide(); 3159 mSelectionModifierCursorController.resetTouchOffsets(); 3160 } 3161 3162 mSelectionActionMode = null; 3163 } 3164 3165 @Override 3166 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3167 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3168 super.onGetContentRect(mode, view, outRect); 3169 return; 3170 } 3171 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3172 // We have a selection. 3173 mSelectionPath.reset(); 3174 mTextView.getLayout().getSelectionPath( 3175 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3176 mSelectionPath.computeBounds(mSelectionBounds, true); 3177 mSelectionBounds.bottom += mSelectionHandleHeight; 3178 } else if (mCursorCount == 2) { 3179 // We have a split cursor. In this case, we take the rectangle that includes both 3180 // parts of the cursor to ensure we don't obscure either of them. 3181 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3182 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3183 mSelectionBounds.set( 3184 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3185 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3186 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3187 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3188 + mInsertionHandleHeight); 3189 } else { 3190 // We have a single cursor. 3191 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3192 float primaryHorizontal = 3193 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3194 mSelectionBounds.set( 3195 primaryHorizontal, 3196 mTextView.getLayout().getLineTop(line), 3197 primaryHorizontal + 1, 3198 mTextView.getLayout().getLineTop(line + 1) + mInsertionHandleHeight); 3199 } 3200 // Take TextView's padding and scroll into account. 3201 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3202 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3203 outRect.set( 3204 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3205 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3206 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3207 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3208 } 3209 } 3210 3211 /** 3212 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3213 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3214 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3215 */ 3216 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3217 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3218 final int[] mTmpIntOffset = new int[2]; 3219 final Matrix mViewToScreenMatrix = new Matrix(); 3220 3221 @Override 3222 public void updatePosition(int parentPositionX, int parentPositionY, 3223 boolean parentPositionChanged, boolean parentScrolled) { 3224 final InputMethodState ims = mInputMethodState; 3225 if (ims == null || ims.mBatchEditNesting > 0) { 3226 return; 3227 } 3228 final InputMethodManager imm = InputMethodManager.peekInstance(); 3229 if (null == imm) { 3230 return; 3231 } 3232 if (!imm.isActive(mTextView)) { 3233 return; 3234 } 3235 // Skip if the IME has not requested the cursor/anchor position. 3236 if (!imm.isCursorAnchorInfoEnabled()) { 3237 return; 3238 } 3239 Layout layout = mTextView.getLayout(); 3240 if (layout == null) { 3241 return; 3242 } 3243 3244 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3245 builder.reset(); 3246 3247 final int selectionStart = mTextView.getSelectionStart(); 3248 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3249 3250 // Construct transformation matrix from view local coordinates to screen coordinates. 3251 mViewToScreenMatrix.set(mTextView.getMatrix()); 3252 mTextView.getLocationOnScreen(mTmpIntOffset); 3253 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3254 builder.setMatrix(mViewToScreenMatrix); 3255 3256 final float viewportToContentHorizontalOffset = 3257 mTextView.viewportToContentHorizontalOffset(); 3258 final float viewportToContentVerticalOffset = 3259 mTextView.viewportToContentVerticalOffset(); 3260 3261 final CharSequence text = mTextView.getText(); 3262 if (text instanceof Spannable) { 3263 final Spannable sp = (Spannable) text; 3264 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3265 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3266 if (composingTextEnd < composingTextStart) { 3267 final int temp = composingTextEnd; 3268 composingTextEnd = composingTextStart; 3269 composingTextStart = temp; 3270 } 3271 final boolean hasComposingText = 3272 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3273 if (hasComposingText) { 3274 final CharSequence composingText = text.subSequence(composingTextStart, 3275 composingTextEnd); 3276 builder.setComposingText(composingTextStart, composingText); 3277 3278 final int minLine = layout.getLineForOffset(composingTextStart); 3279 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3280 for (int line = minLine; line <= maxLine; ++line) { 3281 final int lineStart = layout.getLineStart(line); 3282 final int lineEnd = layout.getLineEnd(line); 3283 final int offsetStart = Math.max(lineStart, composingTextStart); 3284 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3285 final boolean ltrLine = 3286 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3287 final float[] widths = new float[offsetEnd - offsetStart]; 3288 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3289 final float top = layout.getLineTop(line); 3290 final float bottom = layout.getLineBottom(line); 3291 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3292 final float charWidth = widths[offset - offsetStart]; 3293 final boolean isRtl = layout.isRtlCharAt(offset); 3294 final float primary = layout.getPrimaryHorizontal(offset); 3295 final float secondary = layout.getSecondaryHorizontal(offset); 3296 // TODO: This doesn't work perfectly for text with custom styles and 3297 // TAB chars. 3298 final float left; 3299 final float right; 3300 if (ltrLine) { 3301 if (isRtl) { 3302 left = secondary - charWidth; 3303 right = secondary; 3304 } else { 3305 left = primary; 3306 right = primary + charWidth; 3307 } 3308 } else { 3309 if (!isRtl) { 3310 left = secondary; 3311 right = secondary + charWidth; 3312 } else { 3313 left = primary - charWidth; 3314 right = primary; 3315 } 3316 } 3317 // TODO: Check top-right and bottom-left as well. 3318 final float localLeft = left + viewportToContentHorizontalOffset; 3319 final float localRight = right + viewportToContentHorizontalOffset; 3320 final float localTop = top + viewportToContentVerticalOffset; 3321 final float localBottom = bottom + viewportToContentVerticalOffset; 3322 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3323 final boolean isBottomRightVisible = 3324 isPositionVisible(localRight, localBottom); 3325 int characterBoundsFlags = 0; 3326 if (isTopLeftVisible || isBottomRightVisible) { 3327 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3328 } 3329 if (!isTopLeftVisible || !isBottomRightVisible) { 3330 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3331 } 3332 if (isRtl) { 3333 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3334 } 3335 // Here offset is the index in Java chars. 3336 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3337 localBottom, characterBoundsFlags); 3338 } 3339 } 3340 } 3341 } 3342 3343 // Treat selectionStart as the insertion point. 3344 if (0 <= selectionStart) { 3345 final int offset = selectionStart; 3346 final int line = layout.getLineForOffset(offset); 3347 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3348 + viewportToContentHorizontalOffset; 3349 final float insertionMarkerTop = layout.getLineTop(line) 3350 + viewportToContentVerticalOffset; 3351 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3352 + viewportToContentVerticalOffset; 3353 final float insertionMarkerBottom = layout.getLineBottom(line) 3354 + viewportToContentVerticalOffset; 3355 final boolean isTopVisible = 3356 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3357 final boolean isBottomVisible = 3358 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3359 int insertionMarkerFlags = 0; 3360 if (isTopVisible || isBottomVisible) { 3361 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3362 } 3363 if (!isTopVisible || !isBottomVisible) { 3364 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3365 } 3366 if (layout.isRtlCharAt(offset)) { 3367 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3368 } 3369 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3370 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3371 } 3372 3373 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3374 } 3375 } 3376 3377 private abstract class HandleView extends View implements TextViewPositionListener { 3378 protected Drawable mDrawable; 3379 protected Drawable mDrawableLtr; 3380 protected Drawable mDrawableRtl; 3381 private final PopupWindow mContainer; 3382 // Position with respect to the parent TextView 3383 private int mPositionX, mPositionY; 3384 private boolean mIsDragging; 3385 // Offset from touch position to mPosition 3386 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3387 protected int mHotspotX; 3388 protected int mHorizontalGravity; 3389 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3390 private float mTouchOffsetY; 3391 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3392 private float mIdealVerticalOffset; 3393 // Parent's (TextView) previous position in window 3394 private int mLastParentX, mLastParentY; 3395 // Previous text character offset 3396 protected int mPreviousOffset = -1; 3397 // Previous text character offset 3398 private boolean mPositionHasChanged = true; 3399 // Minimum touch target size for handles 3400 private int mMinSize; 3401 // Indicates the line of text that the handle is on. 3402 protected int mPrevLine = -1; 3403 3404 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3405 super(mTextView.getContext()); 3406 mContainer = new PopupWindow(mTextView.getContext(), null, 3407 com.android.internal.R.attr.textSelectHandleWindowStyle); 3408 mContainer.setSplitTouchEnabled(true); 3409 mContainer.setClippingEnabled(false); 3410 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3411 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3412 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3413 mContainer.setContentView(this); 3414 3415 mDrawableLtr = drawableLtr; 3416 mDrawableRtl = drawableRtl; 3417 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3418 com.android.internal.R.dimen.text_handle_min_size); 3419 3420 updateDrawable(); 3421 3422 final int handleHeight = getPreferredHeight(); 3423 mTouchOffsetY = -0.3f * handleHeight; 3424 mIdealVerticalOffset = 0.7f * handleHeight; 3425 } 3426 3427 protected void updateDrawable() { 3428 final int offset = getCurrentCursorOffset(); 3429 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3430 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3431 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3432 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3433 } 3434 3435 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3436 protected abstract int getHorizontalGravity(boolean isRtlRun); 3437 3438 // Touch-up filter: number of previous positions remembered 3439 private static final int HISTORY_SIZE = 5; 3440 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3441 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3442 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3443 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3444 private int mPreviousOffsetIndex = 0; 3445 private int mNumberPreviousOffsets = 0; 3446 3447 private void startTouchUpFilter(int offset) { 3448 mNumberPreviousOffsets = 0; 3449 addPositionToTouchUpFilter(offset); 3450 } 3451 3452 private void addPositionToTouchUpFilter(int offset) { 3453 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3454 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3455 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3456 mNumberPreviousOffsets++; 3457 } 3458 3459 private void filterOnTouchUp() { 3460 final long now = SystemClock.uptimeMillis(); 3461 int i = 0; 3462 int index = mPreviousOffsetIndex; 3463 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3464 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3465 i++; 3466 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3467 } 3468 3469 if (i > 0 && i < iMax && 3470 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3471 positionAtCursorOffset(mPreviousOffsets[index], false); 3472 } 3473 } 3474 3475 public boolean offsetHasBeenChanged() { 3476 return mNumberPreviousOffsets > 1; 3477 } 3478 3479 @Override 3480 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3481 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3482 } 3483 3484 private int getPreferredWidth() { 3485 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3486 } 3487 3488 private int getPreferredHeight() { 3489 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3490 } 3491 3492 public void show() { 3493 if (isShowing()) return; 3494 3495 getPositionListener().addSubscriber(this, true /* local position may change */); 3496 3497 // Make sure the offset is always considered new, even when focusing at same position 3498 mPreviousOffset = -1; 3499 positionAtCursorOffset(getCurrentCursorOffset(), false); 3500 } 3501 3502 protected void dismiss() { 3503 mIsDragging = false; 3504 mContainer.dismiss(); 3505 onDetached(); 3506 } 3507 3508 public void hide() { 3509 dismiss(); 3510 3511 getPositionListener().removeSubscriber(this); 3512 } 3513 3514 public boolean isShowing() { 3515 return mContainer.isShowing(); 3516 } 3517 3518 private boolean isVisible() { 3519 // Always show a dragging handle. 3520 if (mIsDragging) { 3521 return true; 3522 } 3523 3524 if (mTextView.isInBatchEditMode()) { 3525 return false; 3526 } 3527 3528 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3529 } 3530 3531 public abstract int getCurrentCursorOffset(); 3532 3533 protected abstract void updateSelection(int offset); 3534 3535 public abstract void updatePosition(float x, float y); 3536 3537 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3538 // A HandleView relies on the layout, which may be nulled by external methods 3539 Layout layout = mTextView.getLayout(); 3540 if (layout == null) { 3541 // Will update controllers' state, hiding them and stopping selection mode if needed 3542 prepareCursorControllers(); 3543 return; 3544 } 3545 3546 boolean offsetChanged = offset != mPreviousOffset; 3547 if (offsetChanged || parentScrolled) { 3548 if (offsetChanged) { 3549 updateSelection(offset); 3550 addPositionToTouchUpFilter(offset); 3551 } 3552 final int line = layout.getLineForOffset(offset); 3553 mPrevLine = line; 3554 3555 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3556 getHorizontalOffset() + getCursorOffset()); 3557 mPositionY = layout.getLineBottom(line); 3558 3559 // Take TextView's padding and scroll into account. 3560 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3561 mPositionY += mTextView.viewportToContentVerticalOffset(); 3562 3563 mPreviousOffset = offset; 3564 mPositionHasChanged = true; 3565 } 3566 } 3567 3568 public void updatePosition(int parentPositionX, int parentPositionY, 3569 boolean parentPositionChanged, boolean parentScrolled) { 3570 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3571 if (parentPositionChanged || mPositionHasChanged) { 3572 if (mIsDragging) { 3573 // Update touchToWindow offset in case of parent scrolling while dragging 3574 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3575 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3576 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3577 mLastParentX = parentPositionX; 3578 mLastParentY = parentPositionY; 3579 } 3580 3581 onHandleMoved(); 3582 } 3583 3584 if (isVisible()) { 3585 final int positionX = parentPositionX + mPositionX; 3586 final int positionY = parentPositionY + mPositionY; 3587 if (isShowing()) { 3588 mContainer.update(positionX, positionY, -1, -1); 3589 } else { 3590 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3591 positionX, positionY); 3592 } 3593 } else { 3594 if (isShowing()) { 3595 dismiss(); 3596 } 3597 } 3598 3599 mPositionHasChanged = false; 3600 } 3601 } 3602 3603 public void showAtLocation(int offset) { 3604 // TODO - investigate if there's a better way to show the handles 3605 // after the drag accelerator has occured. 3606 int[] tmpCords = new int[2]; 3607 mTextView.getLocationInWindow(tmpCords); 3608 3609 Layout layout = mTextView.getLayout(); 3610 int posX = tmpCords[0]; 3611 int posY = tmpCords[1]; 3612 3613 final int line = layout.getLineForOffset(offset); 3614 3615 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3616 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3617 int startY = layout.getLineBottom(line); 3618 3619 // Take TextView's padding and scroll into account. 3620 startX += mTextView.viewportToContentHorizontalOffset(); 3621 startY += mTextView.viewportToContentVerticalOffset(); 3622 3623 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3624 startX + posX, startY + posY); 3625 } 3626 3627 @Override 3628 protected void onDraw(Canvas c) { 3629 final int drawWidth = mDrawable.getIntrinsicWidth(); 3630 final int left = getHorizontalOffset(); 3631 3632 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3633 mDrawable.draw(c); 3634 } 3635 3636 private int getHorizontalOffset() { 3637 final int width = getPreferredWidth(); 3638 final int drawWidth = mDrawable.getIntrinsicWidth(); 3639 final int left; 3640 switch (mHorizontalGravity) { 3641 case Gravity.LEFT: 3642 left = 0; 3643 break; 3644 default: 3645 case Gravity.CENTER: 3646 left = (width - drawWidth) / 2; 3647 break; 3648 case Gravity.RIGHT: 3649 left = width - drawWidth; 3650 break; 3651 } 3652 return left; 3653 } 3654 3655 protected int getCursorOffset() { 3656 return 0; 3657 } 3658 3659 @Override 3660 public boolean onTouchEvent(MotionEvent ev) { 3661 switch (ev.getActionMasked()) { 3662 case MotionEvent.ACTION_DOWN: { 3663 startTouchUpFilter(getCurrentCursorOffset()); 3664 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3665 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3666 3667 final PositionListener positionListener = getPositionListener(); 3668 mLastParentX = positionListener.getPositionX(); 3669 mLastParentY = positionListener.getPositionY(); 3670 mIsDragging = true; 3671 break; 3672 } 3673 3674 case MotionEvent.ACTION_MOVE: { 3675 final float rawX = ev.getRawX(); 3676 final float rawY = ev.getRawY(); 3677 3678 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3679 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3680 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3681 float newVerticalOffset; 3682 if (previousVerticalOffset < mIdealVerticalOffset) { 3683 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3684 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3685 } else { 3686 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3687 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3688 } 3689 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3690 3691 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3692 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3693 3694 updatePosition(newPosX, newPosY); 3695 break; 3696 } 3697 3698 case MotionEvent.ACTION_UP: 3699 filterOnTouchUp(); 3700 mIsDragging = false; 3701 break; 3702 3703 case MotionEvent.ACTION_CANCEL: 3704 mIsDragging = false; 3705 break; 3706 } 3707 return true; 3708 } 3709 3710 public boolean isDragging() { 3711 return mIsDragging; 3712 } 3713 3714 void onHandleMoved() {} 3715 3716 public void onDetached() {} 3717 } 3718 3719 private class InsertionHandleView extends HandleView { 3720 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3721 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3722 3723 // Used to detect taps on the insertion handle, which will affect the selection action mode 3724 private float mDownPositionX, mDownPositionY; 3725 private Runnable mHider; 3726 3727 public InsertionHandleView(Drawable drawable) { 3728 super(drawable, drawable); 3729 } 3730 3731 @Override 3732 public void show() { 3733 super.show(); 3734 3735 final long durationSinceCutOrCopy = 3736 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 3737 3738 // Cancel the single tap delayed runnable. 3739 if (mDoubleTap && mSelectionModeWithoutSelectionRunnable != null) { 3740 mTextView.removeCallbacks(mSelectionModeWithoutSelectionRunnable); 3741 } 3742 3743 // Prepare and schedule the single tap runnable to run exactly after the double tap 3744 // timeout has passed. 3745 if (!mDoubleTap && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 3746 if (mSelectionModeWithoutSelectionRunnable == null) { 3747 mSelectionModeWithoutSelectionRunnable = new Runnable() { 3748 public void run() { 3749 startSelectionActionModeWithoutSelection(); 3750 } 3751 }; 3752 } 3753 3754 mTextView.postDelayed( 3755 mSelectionModeWithoutSelectionRunnable, 3756 ViewConfiguration.getDoubleTapTimeout() + 1); 3757 } 3758 3759 hideAfterDelay(); 3760 } 3761 3762 private void hideAfterDelay() { 3763 if (mHider == null) { 3764 mHider = new Runnable() { 3765 public void run() { 3766 hide(); 3767 } 3768 }; 3769 } else { 3770 removeHiderCallback(); 3771 } 3772 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3773 } 3774 3775 private void removeHiderCallback() { 3776 if (mHider != null) { 3777 mTextView.removeCallbacks(mHider); 3778 } 3779 } 3780 3781 @Override 3782 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3783 return drawable.getIntrinsicWidth() / 2; 3784 } 3785 3786 @Override 3787 protected int getHorizontalGravity(boolean isRtlRun) { 3788 return Gravity.CENTER_HORIZONTAL; 3789 } 3790 3791 @Override 3792 protected int getCursorOffset() { 3793 int offset = super.getCursorOffset(); 3794 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3795 if (cursor != null) { 3796 cursor.getPadding(mTempRect); 3797 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3798 } 3799 return offset; 3800 } 3801 3802 @Override 3803 public boolean onTouchEvent(MotionEvent ev) { 3804 final boolean result = super.onTouchEvent(ev); 3805 3806 switch (ev.getActionMasked()) { 3807 case MotionEvent.ACTION_DOWN: 3808 mDownPositionX = ev.getRawX(); 3809 mDownPositionY = ev.getRawY(); 3810 break; 3811 3812 case MotionEvent.ACTION_UP: 3813 if (!offsetHasBeenChanged()) { 3814 final float deltaX = mDownPositionX - ev.getRawX(); 3815 final float deltaY = mDownPositionY - ev.getRawY(); 3816 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3817 3818 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3819 mTextView.getContext()); 3820 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3821 3822 if (distanceSquared < touchSlop * touchSlop) { 3823 // Tapping on the handle toggles the selection action mode. 3824 if (mSelectionActionMode != null) { 3825 mSelectionActionMode.finish(); 3826 } else { 3827 startSelectionActionModeWithoutSelection(); 3828 } 3829 } 3830 } else { 3831 if (mSelectionActionMode != null) { 3832 mSelectionActionMode.invalidateContentRect(); 3833 } 3834 } 3835 hideAfterDelay(); 3836 break; 3837 3838 case MotionEvent.ACTION_CANCEL: 3839 hideAfterDelay(); 3840 break; 3841 3842 default: 3843 break; 3844 } 3845 3846 return result; 3847 } 3848 3849 @Override 3850 public int getCurrentCursorOffset() { 3851 return mTextView.getSelectionStart(); 3852 } 3853 3854 @Override 3855 public void updateSelection(int offset) { 3856 Selection.setSelection((Spannable) mTextView.getText(), offset); 3857 } 3858 3859 @Override 3860 public void updatePosition(float x, float y) { 3861 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3862 if (mSelectionActionMode != null) { 3863 mSelectionActionMode.invalidate(); 3864 } 3865 } 3866 3867 @Override 3868 void onHandleMoved() { 3869 super.onHandleMoved(); 3870 removeHiderCallback(); 3871 } 3872 3873 @Override 3874 public void onDetached() { 3875 super.onDetached(); 3876 removeHiderCallback(); 3877 } 3878 } 3879 3880 private class SelectionStartHandleView extends HandleView { 3881 // Indicates whether the cursor is making adjustments within a word. 3882 private boolean mInWord = false; 3883 // Difference between touch position and word boundary position. 3884 private float mTouchWordDelta; 3885 3886 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3887 super(drawableLtr, drawableRtl); 3888 } 3889 3890 @Override 3891 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3892 return isRtlRun ? 0 : drawable.getIntrinsicWidth(); 3893 } 3894 3895 @Override 3896 protected int getHorizontalGravity(boolean isRtlRun) { 3897 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 3898 } 3899 3900 @Override 3901 public int getCurrentCursorOffset() { 3902 return mTextView.getSelectionStart(); 3903 } 3904 3905 @Override 3906 public void updateSelection(int offset) { 3907 Selection.setSelection((Spannable) mTextView.getText(), offset, 3908 mTextView.getSelectionEnd()); 3909 updateDrawable(); 3910 if (mSelectionActionMode != null) { 3911 mSelectionActionMode.invalidate(); 3912 } 3913 } 3914 3915 @Override 3916 public void updatePosition(float x, float y) { 3917 final int trueOffset = mTextView.getOffsetForPosition(x, y); 3918 final int currLine = mTextView.getLineAtCoordinate(y); 3919 boolean positionCursor = false; 3920 int offset = trueOffset; 3921 int end = getWordEnd(offset); 3922 int start = getWordStart(offset); 3923 3924 if (offset < mPreviousOffset) { 3925 // User is increasing the selection. 3926 if (!mInWord || currLine < mPrevLine) { 3927 // We're not in a word, or we're on a different line so we'll expand by 3928 // word. First ensure the user has at least entered the next word. 3929 int offsetToWord = Math.min((end - start) / 2, 2); 3930 if (offset <= end - offsetToWord || currLine < mPrevLine) { 3931 offset = start; 3932 } else { 3933 offset = mPreviousOffset; 3934 } 3935 } 3936 final Layout layout = mTextView.getLayout(); 3937 if (layout != null && offset < trueOffset) { 3938 final float adjustedX = layout.getPrimaryHorizontal(offset); 3939 mTouchWordDelta = 3940 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 3941 } else { 3942 mTouchWordDelta = 0.0f; 3943 } 3944 positionCursor = true; 3945 } else { 3946 final int adjustedOffset = 3947 mTextView.getOffsetAtCoordinate(currLine, x - mTouchWordDelta); 3948 if (adjustedOffset > mPreviousOffset || currLine > mPrevLine) { 3949 // User is shrinking the selection. 3950 if (currLine > mPrevLine) { 3951 // We're on a different line, so we'll snap to word boundaries. 3952 offset = start; 3953 final Layout layout = mTextView.getLayout(); 3954 if (layout != null && offset < trueOffset) { 3955 final float adjustedX = layout.getPrimaryHorizontal(offset); 3956 mTouchWordDelta = 3957 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 3958 } else { 3959 mTouchWordDelta = 0.0f; 3960 } 3961 } else { 3962 offset = adjustedOffset; 3963 } 3964 positionCursor = true; 3965 } 3966 } 3967 3968 // Handles can not cross and selection is at least one character. 3969 if (positionCursor) { 3970 final int selectionEnd = mTextView.getSelectionEnd(); 3971 if (offset >= selectionEnd) { 3972 // We can't cross the handles so let's just constrain the Y value. 3973 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 3974 if (alteredOffset >= selectionEnd) { 3975 // Can't pass the other drag handle. 3976 offset = getNextCursorOffset(selectionEnd, false); 3977 } else { 3978 offset = alteredOffset; 3979 } 3980 mTouchWordDelta = 0.0f; 3981 } 3982 mInWord = !getWordIteratorWithText().isBoundary(offset); 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 mTouchWordDelta = 0.0f; 3993 } 3994 return superResult; 3995 } 3996 } 3997 3998 private class SelectionEndHandleView extends HandleView { 3999 // Indicates whether the cursor is making adjustments within a word. 4000 private boolean mInWord = false; 4001 // Difference between touch position and word boundary position. 4002 private float mTouchWordDelta; 4003 4004 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 4005 super(drawableLtr, drawableRtl); 4006 } 4007 4008 @Override 4009 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4010 return isRtlRun ? drawable.getIntrinsicWidth() : 0; 4011 } 4012 4013 @Override 4014 protected int getHorizontalGravity(boolean isRtlRun) { 4015 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 4016 } 4017 4018 @Override 4019 public int getCurrentCursorOffset() { 4020 return mTextView.getSelectionEnd(); 4021 } 4022 4023 @Override 4024 public void updateSelection(int offset) { 4025 Selection.setSelection((Spannable) mTextView.getText(), 4026 mTextView.getSelectionStart(), offset); 4027 if (mSelectionActionMode != null) { 4028 mSelectionActionMode.invalidate(); 4029 } 4030 updateDrawable(); 4031 } 4032 4033 @Override 4034 public void updatePosition(float x, float y) { 4035 final int trueOffset = mTextView.getOffsetForPosition(x, y); 4036 final int currLine = mTextView.getLineAtCoordinate(y); 4037 int offset = trueOffset; 4038 boolean positionCursor = false; 4039 int end = getWordEnd(offset); 4040 int start = getWordStart(offset); 4041 4042 if (offset > mPreviousOffset) { 4043 // User is increasing the selection. 4044 if (!mInWord || currLine > mPrevLine) { 4045 // We're not in a word, or we're on a different line so we'll expand by 4046 // word. First ensure the user has at least entered the next word. 4047 int midPoint = Math.min((end - start) / 2, 2); 4048 if (offset >= start + midPoint || currLine > mPrevLine) { 4049 offset = end; 4050 } else { 4051 offset = mPreviousOffset; 4052 } 4053 } 4054 final Layout layout = mTextView.getLayout(); 4055 if (layout != null && offset > trueOffset) { 4056 final float adjustedX = layout.getPrimaryHorizontal(offset); 4057 mTouchWordDelta = 4058 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4059 } else { 4060 mTouchWordDelta = 0.0f; 4061 } 4062 positionCursor = true; 4063 } else { 4064 final int adjustedOffset = 4065 mTextView.getOffsetAtCoordinate(currLine, x + mTouchWordDelta); 4066 if (adjustedOffset < mPreviousOffset || currLine < mPrevLine) { 4067 // User is shrinking the selection. 4068 if (currLine < mPrevLine) { 4069 // We're on a different line, so we'll snap to word boundaries. 4070 offset = end; 4071 final Layout layout = mTextView.getLayout(); 4072 if (layout != null && offset > trueOffset) { 4073 final float adjustedX = layout.getPrimaryHorizontal(offset); 4074 mTouchWordDelta = 4075 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4076 } else { 4077 mTouchWordDelta = 0.0f; 4078 } 4079 } else { 4080 offset = adjustedOffset; 4081 } 4082 positionCursor = true; 4083 } 4084 } 4085 4086 if (positionCursor) { 4087 final int selectionStart = mTextView.getSelectionStart(); 4088 if (offset <= selectionStart) { 4089 // We can't cross the handles so let's just constrain the Y value. 4090 int alteredOffset = mTextView.getOffsetAtCoordinate(mPrevLine, x); 4091 int length = mTextView.getText().length(); 4092 if (alteredOffset <= selectionStart) { 4093 // Can't pass the other drag handle. 4094 offset = getNextCursorOffset(selectionStart, true); 4095 } else { 4096 offset = Math.min(alteredOffset, length); 4097 } 4098 mTouchWordDelta = 0.0f; 4099 } 4100 mInWord = !getWordIteratorWithText().isBoundary(offset); 4101 positionAtCursorOffset(offset, false); 4102 } 4103 } 4104 4105 @Override 4106 public boolean onTouchEvent(MotionEvent event) { 4107 boolean superResult = super.onTouchEvent(event); 4108 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4109 // Reset the touch word offset when the user has lifted their finger. 4110 mTouchWordDelta = 0.0f; 4111 } 4112 return superResult; 4113 } 4114 } 4115 4116 /** 4117 * A CursorController instance can be used to control a cursor in the text. 4118 */ 4119 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4120 /** 4121 * Makes the cursor controller visible on screen. 4122 * See also {@link #hide()}. 4123 */ 4124 public void show(); 4125 4126 /** 4127 * Hide the cursor controller from screen. 4128 * See also {@link #show()}. 4129 */ 4130 public void hide(); 4131 4132 /** 4133 * Called when the view is detached from window. Perform house keeping task, such as 4134 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4135 * preventing the activity from being recycled. 4136 */ 4137 public void onDetached(); 4138 } 4139 4140 private class InsertionPointCursorController implements CursorController { 4141 private InsertionHandleView mHandle; 4142 4143 public void show() { 4144 getHandle().show(); 4145 4146 if (mSelectionModifierCursorController != null) { 4147 mSelectionModifierCursorController.hide(); 4148 } 4149 } 4150 4151 public void hide() { 4152 if (mHandle != null) { 4153 mHandle.hide(); 4154 } 4155 } 4156 4157 public void onTouchModeChanged(boolean isInTouchMode) { 4158 if (!isInTouchMode) { 4159 hide(); 4160 } 4161 } 4162 4163 private InsertionHandleView getHandle() { 4164 if (mSelectHandleCenter == null) { 4165 mSelectHandleCenter = mTextView.getContext().getDrawable( 4166 mTextView.mTextSelectHandleRes); 4167 } 4168 if (mHandle == null) { 4169 mHandle = new InsertionHandleView(mSelectHandleCenter); 4170 } 4171 return mHandle; 4172 } 4173 4174 @Override 4175 public void onDetached() { 4176 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4177 observer.removeOnTouchModeChangeListener(this); 4178 4179 if (mHandle != null) mHandle.onDetached(); 4180 } 4181 } 4182 4183 class SelectionModifierCursorController implements CursorController { 4184 // The cursor controller handles, lazily created when shown. 4185 private SelectionStartHandleView mStartHandle; 4186 private SelectionEndHandleView mEndHandle; 4187 // The offsets of that last touch down event. Remembered to start selection there. 4188 private int mMinTouchOffset, mMaxTouchOffset; 4189 4190 private float mDownPositionX, mDownPositionY; 4191 private boolean mGestureStayedInTapRegion; 4192 4193 // Where the user first starts the drag motion. 4194 private int mStartOffset = -1; 4195 // Indicates whether the user is selecting text and using the drag accelerator. 4196 private boolean mDragAcceleratorActive; 4197 4198 SelectionModifierCursorController() { 4199 resetTouchOffsets(); 4200 } 4201 4202 public void show() { 4203 if (mTextView.isInBatchEditMode()) { 4204 return; 4205 } 4206 initDrawables(); 4207 initHandles(); 4208 hideInsertionPointCursorController(); 4209 } 4210 4211 private void initDrawables() { 4212 if (mSelectHandleLeft == null) { 4213 mSelectHandleLeft = mTextView.getContext().getDrawable( 4214 mTextView.mTextSelectHandleLeftRes); 4215 } 4216 if (mSelectHandleRight == null) { 4217 mSelectHandleRight = mTextView.getContext().getDrawable( 4218 mTextView.mTextSelectHandleRightRes); 4219 } 4220 } 4221 4222 private void initHandles() { 4223 // Lazy object creation has to be done before updatePosition() is called. 4224 if (mStartHandle == null) { 4225 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4226 } 4227 if (mEndHandle == null) { 4228 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4229 } 4230 4231 mStartHandle.show(); 4232 mEndHandle.show(); 4233 4234 hideInsertionPointCursorController(); 4235 } 4236 4237 public void hide() { 4238 if (mStartHandle != null) mStartHandle.hide(); 4239 if (mEndHandle != null) mEndHandle.hide(); 4240 } 4241 4242 public void enterDrag() { 4243 // Just need to init the handles / hide insertion cursor. 4244 show(); 4245 mDragAcceleratorActive = true; 4246 // Start location of selection. 4247 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4248 mLastDownPositionY); 4249 // Don't show the handles until user has lifted finger. 4250 hide(); 4251 4252 // This stops scrolling parents from intercepting the touch event, allowing 4253 // the user to continue dragging across the screen to select text; TextView will 4254 // scroll as necessary. 4255 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4256 } 4257 4258 public void onTouchEvent(MotionEvent event) { 4259 // This is done even when the View does not have focus, so that long presses can start 4260 // selection and tap can move cursor from this tap position. 4261 switch (event.getActionMasked()) { 4262 case MotionEvent.ACTION_DOWN: 4263 final float x = event.getX(); 4264 final float y = event.getY(); 4265 4266 // Remember finger down position, to be able to start selection from there. 4267 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition(x, y); 4268 4269 // Double tap detection 4270 if (mGestureStayedInTapRegion) { 4271 if (mDoubleTap) { 4272 final float deltaX = x - mDownPositionX; 4273 final float deltaY = y - mDownPositionY; 4274 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4275 4276 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4277 mTextView.getContext()); 4278 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4279 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4280 4281 if (stayedInArea && isPositionOnText(x, y)) { 4282 startSelectionActionModeWithSelectionAndStartDrag(); 4283 mDiscardNextActionUp = true; 4284 } 4285 } 4286 } 4287 4288 mDownPositionX = x; 4289 mDownPositionY = y; 4290 mGestureStayedInTapRegion = true; 4291 break; 4292 4293 case MotionEvent.ACTION_POINTER_DOWN: 4294 case MotionEvent.ACTION_POINTER_UP: 4295 // Handle multi-point gestures. Keep min and max offset positions. 4296 // Only activated for devices that correctly handle multi-touch. 4297 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4298 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4299 updateMinAndMaxOffsets(event); 4300 } 4301 break; 4302 4303 case MotionEvent.ACTION_MOVE: 4304 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4305 mTextView.getContext()); 4306 4307 if (mGestureStayedInTapRegion) { 4308 final float deltaX = event.getX() - mDownPositionX; 4309 final float deltaY = event.getY() - mDownPositionY; 4310 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4311 4312 int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop(); 4313 4314 if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) { 4315 mGestureStayedInTapRegion = false; 4316 } 4317 } 4318 4319 if (mStartHandle != null && mStartHandle.isShowing()) { 4320 // Don't do the drag if the handles are showing already. 4321 break; 4322 } 4323 4324 if (mStartOffset != -1) { 4325 final int rawOffset = mTextView.getOffsetForPosition(event.getX(), 4326 event.getY()); 4327 int offset = rawOffset; 4328 4329 // We don't start "dragging" until the user is past the initial word that 4330 // gets selected on long press. 4331 int firstWordStart = getWordStart(mStartOffset); 4332 int firstWordEnd = getWordEnd(mStartOffset); 4333 if (offset > firstWordEnd || offset < firstWordStart) { 4334 4335 // Basically the goal in the below code is to have the highlight be 4336 // offset so that your finger isn't covering the end point. 4337 int fingerOffset = viewConfiguration.getScaledTouchSlop(); 4338 float mx = event.getX(); 4339 float my = event.getY(); 4340 if (mx > fingerOffset) mx -= fingerOffset; 4341 if (my > fingerOffset) my -= fingerOffset; 4342 offset = mTextView.getOffsetForPosition(mx, my); 4343 4344 // Perform the check for closeness at edge of view, if we're very close 4345 // don't adjust the offset to be in front of the finger - otherwise the 4346 // user can't select words at the edge. 4347 if (mTextView.getWidth() - fingerOffset > mx) { 4348 // We're going by word, so we need to make sure that the offset 4349 // that we get is within this, so we'll get the previous boundary. 4350 final WordIterator wordIterator = getWordIteratorWithText(); 4351 4352 final int precedingOffset = wordIterator.preceding(offset); 4353 if (mStartOffset < offset) { 4354 // Expanding with bottom handle, in this case the selection end 4355 // is before the finger. 4356 offset = Math.max(precedingOffset - 1, 0); 4357 } else { 4358 // Expand with the start handle, in this case the selection 4359 // start is before the finger. 4360 if (precedingOffset == WordIterator.DONE) { 4361 offset = 0; 4362 } else { 4363 offset = wordIterator.preceding(precedingOffset); 4364 } 4365 } 4366 } 4367 if (offset == WordIterator.DONE) 4368 offset = rawOffset; 4369 4370 // Need to adjust start offset based on direction of movement. 4371 int newStart = mStartOffset < offset ? getWordStart(mStartOffset) 4372 : getWordEnd(mStartOffset); 4373 Selection.setSelection((Spannable) mTextView.getText(), newStart, 4374 offset); 4375 } 4376 } 4377 break; 4378 4379 case MotionEvent.ACTION_UP: 4380 if (mDragAcceleratorActive) { 4381 // No longer dragging to select text, let the parent intercept events. 4382 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4383 4384 show(); 4385 int startOffset = mTextView.getSelectionStart(); 4386 int endOffset = mTextView.getSelectionEnd(); 4387 4388 // Since we don't let drag handles pass once they're visible, we need to 4389 // make sure the start / end locations are correct because the user *can* 4390 // switch directions during the initial drag. 4391 if (endOffset < startOffset) { 4392 int tmp = endOffset; 4393 endOffset = startOffset; 4394 startOffset = tmp; 4395 4396 // Also update the selection with the right offsets in this case. 4397 Selection.setSelection((Spannable) mTextView.getText(), 4398 startOffset, endOffset); 4399 } 4400 4401 // Need to do this to display the handles. 4402 mStartHandle.showAtLocation(startOffset); 4403 mEndHandle.showAtLocation(endOffset); 4404 4405 // No longer the first dragging motion, reset. 4406 mDragAcceleratorActive = false; 4407 mStartOffset = -1; 4408 } 4409 break; 4410 } 4411 } 4412 4413 /** 4414 * @param event 4415 */ 4416 private void updateMinAndMaxOffsets(MotionEvent event) { 4417 int pointerCount = event.getPointerCount(); 4418 for (int index = 0; index < pointerCount; index++) { 4419 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4420 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4421 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4422 } 4423 } 4424 4425 public int getMinTouchOffset() { 4426 return mMinTouchOffset; 4427 } 4428 4429 public int getMaxTouchOffset() { 4430 return mMaxTouchOffset; 4431 } 4432 4433 public void resetTouchOffsets() { 4434 mMinTouchOffset = mMaxTouchOffset = -1; 4435 mStartOffset = -1; 4436 mDragAcceleratorActive = false; 4437 } 4438 4439 /** 4440 * @return true iff this controller is currently used to move the selection start. 4441 */ 4442 public boolean isSelectionStartDragged() { 4443 return mStartHandle != null && mStartHandle.isDragging(); 4444 } 4445 4446 /** 4447 * @return true if the user is selecting text using the drag accelerator. 4448 */ 4449 public boolean isDragAcceleratorActive() { 4450 return mDragAcceleratorActive; 4451 } 4452 4453 public void onTouchModeChanged(boolean isInTouchMode) { 4454 if (!isInTouchMode) { 4455 hide(); 4456 } 4457 } 4458 4459 @Override 4460 public void onDetached() { 4461 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4462 observer.removeOnTouchModeChangeListener(this); 4463 4464 if (mStartHandle != null) mStartHandle.onDetached(); 4465 if (mEndHandle != null) mEndHandle.onDetached(); 4466 } 4467 } 4468 4469 private class CorrectionHighlighter { 4470 private final Path mPath = new Path(); 4471 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4472 private int mStart, mEnd; 4473 private long mFadingStartTime; 4474 private RectF mTempRectF; 4475 private final static int FADE_OUT_DURATION = 400; 4476 4477 public CorrectionHighlighter() { 4478 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4479 applicationScale); 4480 mPaint.setStyle(Paint.Style.FILL); 4481 } 4482 4483 public void highlight(CorrectionInfo info) { 4484 mStart = info.getOffset(); 4485 mEnd = mStart + info.getNewText().length(); 4486 mFadingStartTime = SystemClock.uptimeMillis(); 4487 4488 if (mStart < 0 || mEnd < 0) { 4489 stopAnimation(); 4490 } 4491 } 4492 4493 public void draw(Canvas canvas, int cursorOffsetVertical) { 4494 if (updatePath() && updatePaint()) { 4495 if (cursorOffsetVertical != 0) { 4496 canvas.translate(0, cursorOffsetVertical); 4497 } 4498 4499 canvas.drawPath(mPath, mPaint); 4500 4501 if (cursorOffsetVertical != 0) { 4502 canvas.translate(0, -cursorOffsetVertical); 4503 } 4504 invalidate(true); // TODO invalidate cursor region only 4505 } else { 4506 stopAnimation(); 4507 invalidate(false); // TODO invalidate cursor region only 4508 } 4509 } 4510 4511 private boolean updatePaint() { 4512 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4513 if (duration > FADE_OUT_DURATION) return false; 4514 4515 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4516 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4517 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4518 ((int) (highlightColorAlpha * coef) << 24); 4519 mPaint.setColor(color); 4520 return true; 4521 } 4522 4523 private boolean updatePath() { 4524 final Layout layout = mTextView.getLayout(); 4525 if (layout == null) return false; 4526 4527 // Update in case text is edited while the animation is run 4528 final int length = mTextView.getText().length(); 4529 int start = Math.min(length, mStart); 4530 int end = Math.min(length, mEnd); 4531 4532 mPath.reset(); 4533 layout.getSelectionPath(start, end, mPath); 4534 return true; 4535 } 4536 4537 private void invalidate(boolean delayed) { 4538 if (mTextView.getLayout() == null) return; 4539 4540 if (mTempRectF == null) mTempRectF = new RectF(); 4541 mPath.computeBounds(mTempRectF, false); 4542 4543 int left = mTextView.getCompoundPaddingLeft(); 4544 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4545 4546 if (delayed) { 4547 mTextView.postInvalidateOnAnimation( 4548 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4549 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4550 } else { 4551 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4552 (int) mTempRectF.right, (int) mTempRectF.bottom); 4553 } 4554 } 4555 4556 private void stopAnimation() { 4557 Editor.this.mCorrectionHighlighter = null; 4558 } 4559 } 4560 4561 private static class ErrorPopup extends PopupWindow { 4562 private boolean mAbove = false; 4563 private final TextView mView; 4564 private int mPopupInlineErrorBackgroundId = 0; 4565 private int mPopupInlineErrorAboveBackgroundId = 0; 4566 4567 ErrorPopup(TextView v, int width, int height) { 4568 super(v, width, height); 4569 mView = v; 4570 // Make sure the TextView has a background set as it will be used the first time it is 4571 // shown and positioned. Initialized with below background, which should have 4572 // dimensions identical to the above version for this to work (and is more likely). 4573 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4574 com.android.internal.R.styleable.Theme_errorMessageBackground); 4575 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4576 } 4577 4578 void fixDirection(boolean above) { 4579 mAbove = above; 4580 4581 if (above) { 4582 mPopupInlineErrorAboveBackgroundId = 4583 getResourceId(mPopupInlineErrorAboveBackgroundId, 4584 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4585 } else { 4586 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4587 com.android.internal.R.styleable.Theme_errorMessageBackground); 4588 } 4589 4590 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4591 mPopupInlineErrorBackgroundId); 4592 } 4593 4594 private int getResourceId(int currentId, int index) { 4595 if (currentId == 0) { 4596 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4597 R.styleable.Theme); 4598 currentId = styledAttributes.getResourceId(index, 0); 4599 styledAttributes.recycle(); 4600 } 4601 return currentId; 4602 } 4603 4604 @Override 4605 public void update(int x, int y, int w, int h, boolean force) { 4606 super.update(x, y, w, h, force); 4607 4608 boolean above = isAboveAnchor(); 4609 if (above != mAbove) { 4610 fixDirection(above); 4611 } 4612 } 4613 } 4614 4615 static class InputContentType { 4616 int imeOptions = EditorInfo.IME_NULL; 4617 String privateImeOptions; 4618 CharSequence imeActionLabel; 4619 int imeActionId; 4620 Bundle extras; 4621 OnEditorActionListener onEditorActionListener; 4622 boolean enterDown; 4623 } 4624 4625 static class InputMethodState { 4626 ExtractedTextRequest mExtractedTextRequest; 4627 final ExtractedText mExtractedText = new ExtractedText(); 4628 int mBatchEditNesting; 4629 boolean mCursorChanged; 4630 boolean mSelectionModeChanged; 4631 boolean mContentChanged; 4632 int mChangedStart, mChangedEnd, mChangedDelta; 4633 } 4634 4635 /** 4636 * @return True iff (start, end) is a valid range within the text. 4637 */ 4638 private static boolean isValidRange(CharSequence text, int start, int end) { 4639 return 0 <= start && start <= end && end <= text.length(); 4640 } 4641 4642 /** 4643 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4644 * text being typed (and hence always returns null from the filter() method). 4645 */ 4646 public static class UndoInputFilter implements InputFilter { 4647 private final Editor mEditor; 4648 4649 // Whether the current filter pass is directly caused by an end-user text edit. 4650 private boolean mIsUserEdit; 4651 4652 // Whether the text field is handling an IME composition. Must be parceled in case the user 4653 // rotates the screen during composition. 4654 private boolean mHasComposition; 4655 4656 public UndoInputFilter(Editor editor) { 4657 mEditor = editor; 4658 } 4659 4660 public void saveInstanceState(Parcel parcel) { 4661 parcel.writeInt(mIsUserEdit ? 1 : 0); 4662 parcel.writeInt(mHasComposition ? 1 : 0); 4663 } 4664 4665 public void restoreInstanceState(Parcel parcel) { 4666 mIsUserEdit = parcel.readInt() != 0; 4667 mHasComposition = parcel.readInt() != 0; 4668 } 4669 4670 /** 4671 * Signals that a user-triggered edit is starting. 4672 */ 4673 public void beginBatchEdit() { 4674 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4675 mIsUserEdit = true; 4676 } 4677 4678 public void endBatchEdit() { 4679 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4680 mIsUserEdit = false; 4681 } 4682 4683 @Override 4684 public CharSequence filter(CharSequence source, int start, int end, 4685 Spanned dest, int dstart, int dend) { 4686 if (DEBUG_UNDO) { 4687 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4688 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4689 } 4690 4691 // Check to see if this edit should be tracked for undo. 4692 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4693 return null; 4694 } 4695 4696 // Check for and handle IME composition edits. 4697 if (handleCompositionEdit(source, start, end, dstart)) { 4698 return null; 4699 } 4700 4701 // Handle keyboard edits. 4702 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4703 return null; 4704 } 4705 4706 /** 4707 * Returns true iff the edit was handled, either because it should be ignored or because 4708 * this function created an undo operation for it. 4709 */ 4710 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4711 // Ignore edits while the user is composing. 4712 if (isComposition(source)) { 4713 mHasComposition = true; 4714 return true; 4715 } 4716 final boolean hadComposition = mHasComposition; 4717 mHasComposition = false; 4718 4719 // Check for the transition out of the composing state. 4720 if (hadComposition) { 4721 // If there was no text the user canceled composition. Ignore the edit. 4722 if (start == end) { 4723 return true; 4724 } 4725 4726 // Otherwise the user inserted the composition. 4727 String newText = TextUtils.substring(source, start, end); 4728 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4729 recordEdit(edit, false /* forceMerge */); 4730 return true; 4731 } 4732 4733 // This was neither a composition event nor a transition out of composing. 4734 return false; 4735 } 4736 4737 private void handleKeyboardEdit(CharSequence source, int start, int end, 4738 Spanned dest, int dstart, int dend) { 4739 // An application may install a TextWatcher to provide additional modifications after 4740 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4741 // string). This results in multiple filter() calls for what the user considers to be 4742 // a single operation. Always undo the whole set of changes in one step. 4743 final boolean forceMerge = isInTextWatcher(); 4744 4745 // Build a new operation with all the information from this edit. 4746 String newText = TextUtils.substring(source, start, end); 4747 String oldText = TextUtils.substring(dest, dstart, dend); 4748 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4749 recordEdit(edit, forceMerge); 4750 } 4751 4752 /** 4753 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4754 * If forceMerge is true then the new edit is always merged. 4755 */ 4756 private void recordEdit(EditOperation edit, boolean forceMerge) { 4757 // Fetch the last edit operation and attempt to merge in the new edit. 4758 final UndoManager um = mEditor.mUndoManager; 4759 um.beginUpdate("Edit text"); 4760 EditOperation lastEdit = um.getLastOperation( 4761 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4762 if (lastEdit == null) { 4763 // Add this as the first edit. 4764 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4765 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4766 } else if (forceMerge) { 4767 // Forced merges take priority because they could be the result of a non-user-edit 4768 // change and this case should not create a new undo operation. 4769 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4770 lastEdit.forceMergeWith(edit); 4771 } else if (!mIsUserEdit) { 4772 // An application directly modified the Editable outside of a text edit. Treat this 4773 // as a new change and don't attempt to merge. 4774 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4775 um.commitState(mEditor.mUndoOwner); 4776 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4777 } else if (lastEdit.mergeWith(edit)) { 4778 // Merge succeeded, nothing else to do. 4779 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4780 } else { 4781 // Could not merge with the last edit, so commit the last edit and add this edit. 4782 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4783 um.commitState(mEditor.mUndoOwner); 4784 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4785 } 4786 um.endUpdate(); 4787 } 4788 4789 private boolean canUndoEdit(CharSequence source, int start, int end, 4790 Spanned dest, int dstart, int dend) { 4791 if (!mEditor.mAllowUndo) { 4792 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4793 return false; 4794 } 4795 4796 if (mEditor.mUndoManager.isInUndo()) { 4797 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4798 return false; 4799 } 4800 4801 // Text filters run before input operations are applied. However, some input operations 4802 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4803 // attempt to undo invalid operations. 4804 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4805 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4806 return false; 4807 } 4808 4809 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4810 // on an input field. Skip no-op changes. 4811 if (start == end && dstart == dend) { 4812 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4813 return false; 4814 } 4815 4816 return true; 4817 } 4818 4819 private boolean isComposition(CharSequence source) { 4820 if (!(source instanceof Spannable)) { 4821 return false; 4822 } 4823 // This is a composition edit if the source has a non-zero-length composing span. 4824 Spannable text = (Spannable) source; 4825 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4826 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4827 return composeBegin < composeEnd; 4828 } 4829 4830 private boolean isInTextWatcher() { 4831 CharSequence text = mEditor.mTextView.getText(); 4832 return (text instanceof SpannableStringBuilder) 4833 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4834 } 4835 } 4836 4837 /** 4838 * An operation to undo a single "edit" to a text view. 4839 */ 4840 public static class EditOperation extends UndoOperation<Editor> { 4841 private static final int TYPE_INSERT = 0; 4842 private static final int TYPE_DELETE = 1; 4843 private static final int TYPE_REPLACE = 2; 4844 4845 private int mType; 4846 private String mOldText; 4847 private int mOldTextStart; 4848 private String mNewText; 4849 private int mNewTextStart; 4850 4851 private int mOldCursorPos; 4852 private int mNewCursorPos; 4853 4854 /** 4855 * Constructs an edit operation from a text input operation on editor that replaces the 4856 * oldText starting at dstart with newText. 4857 */ 4858 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 4859 super(editor.mUndoOwner); 4860 mOldText = oldText; 4861 mNewText = newText; 4862 4863 // Determine the type of the edit and store where it occurred. Avoid storing 4864 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4865 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4866 // outside the bounds of the final text). 4867 if (mNewText.length() > 0 && mOldText.length() == 0) { 4868 mType = TYPE_INSERT; 4869 mNewTextStart = dstart; 4870 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4871 mType = TYPE_DELETE; 4872 mOldTextStart = dstart; 4873 } else { 4874 mType = TYPE_REPLACE; 4875 mOldTextStart = mNewTextStart = dstart; 4876 } 4877 4878 // Store cursor data. 4879 mOldCursorPos = editor.mTextView.getSelectionStart(); 4880 mNewCursorPos = dstart + mNewText.length(); 4881 } 4882 4883 public EditOperation(Parcel src, ClassLoader loader) { 4884 super(src, loader); 4885 mType = src.readInt(); 4886 mOldText = src.readString(); 4887 mOldTextStart = src.readInt(); 4888 mNewText = src.readString(); 4889 mNewTextStart = src.readInt(); 4890 mOldCursorPos = src.readInt(); 4891 mNewCursorPos = src.readInt(); 4892 } 4893 4894 @Override 4895 public void writeToParcel(Parcel dest, int flags) { 4896 dest.writeInt(mType); 4897 dest.writeString(mOldText); 4898 dest.writeInt(mOldTextStart); 4899 dest.writeString(mNewText); 4900 dest.writeInt(mNewTextStart); 4901 dest.writeInt(mOldCursorPos); 4902 dest.writeInt(mNewCursorPos); 4903 } 4904 4905 private int getNewTextEnd() { 4906 return mNewTextStart + mNewText.length(); 4907 } 4908 4909 private int getOldTextEnd() { 4910 return mOldTextStart + mOldText.length(); 4911 } 4912 4913 @Override 4914 public void commit() { 4915 } 4916 4917 @Override 4918 public void undo() { 4919 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4920 // Remove the new text and insert the old. 4921 Editor editor = getOwnerData(); 4922 Editable text = (Editable) editor.mTextView.getText(); 4923 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4924 mOldCursorPos); 4925 } 4926 4927 @Override 4928 public void redo() { 4929 if (DEBUG_UNDO) Log.d(TAG, "redo"); 4930 // Remove the old text and insert the new. 4931 Editor editor = getOwnerData(); 4932 Editable text = (Editable) editor.mTextView.getText(); 4933 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 4934 mNewCursorPos); 4935 } 4936 4937 /** 4938 * Attempts to merge this existing operation with a new edit. 4939 * @param edit The new edit operation. 4940 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 4941 * object unchanged. 4942 */ 4943 private boolean mergeWith(EditOperation edit) { 4944 if (DEBUG_UNDO) { 4945 Log.d(TAG, "mergeWith old " + this); 4946 Log.d(TAG, "mergeWith new " + edit); 4947 } 4948 switch (mType) { 4949 case TYPE_INSERT: 4950 return mergeInsertWith(edit); 4951 case TYPE_DELETE: 4952 return mergeDeleteWith(edit); 4953 case TYPE_REPLACE: 4954 return mergeReplaceWith(edit); 4955 default: 4956 return false; 4957 } 4958 } 4959 4960 private boolean mergeInsertWith(EditOperation edit) { 4961 // Only merge continuous insertions. 4962 if (edit.mType != TYPE_INSERT) { 4963 return false; 4964 } 4965 // Only merge insertions that are contiguous. 4966 if (getNewTextEnd() != edit.mNewTextStart) { 4967 return false; 4968 } 4969 mNewText += edit.mNewText; 4970 mNewCursorPos = edit.mNewCursorPos; 4971 return true; 4972 } 4973 4974 // TODO: Support forward delete. 4975 private boolean mergeDeleteWith(EditOperation edit) { 4976 // Only merge continuous deletes. 4977 if (edit.mType != TYPE_DELETE) { 4978 return false; 4979 } 4980 // Only merge deletions that are contiguous. 4981 if (mOldTextStart != edit.getOldTextEnd()) { 4982 return false; 4983 } 4984 mOldTextStart = edit.mOldTextStart; 4985 mOldText = edit.mOldText + mOldText; 4986 mNewCursorPos = edit.mNewCursorPos; 4987 return true; 4988 } 4989 4990 private boolean mergeReplaceWith(EditOperation edit) { 4991 // Replacements can merge only with adjacent inserts. 4992 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 4993 return false; 4994 } 4995 mOldText += edit.mOldText; 4996 mNewText += edit.mNewText; 4997 mNewCursorPos = edit.mNewCursorPos; 4998 return true; 4999 } 5000 5001 /** 5002 * Forcibly creates a single merged edit operation by simulating the entire text 5003 * contents being replaced. 5004 */ 5005 public void forceMergeWith(EditOperation edit) { 5006 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5007 Editor editor = getOwnerData(); 5008 5009 // Copy the text of the current field. 5010 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5011 // but would require two parallel implementations of modifyText() because Editable and 5012 // StringBuilder do not share an interface for replace/delete/insert. 5013 Editable editable = (Editable) editor.mTextView.getText(); 5014 Editable originalText = new SpannableStringBuilder(editable.toString()); 5015 5016 // Roll back the last operation. 5017 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5018 mOldCursorPos); 5019 5020 // Clone the text again and apply the new operation. 5021 Editable finalText = new SpannableStringBuilder(editable.toString()); 5022 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5023 edit.mNewTextStart, edit.mNewCursorPos); 5024 5025 // Convert this operation into a non-mergeable replacement of the entire string. 5026 mType = TYPE_REPLACE; 5027 mNewText = finalText.toString(); 5028 mNewTextStart = 0; 5029 mOldText = originalText.toString(); 5030 mOldTextStart = 0; 5031 mNewCursorPos = edit.mNewCursorPos; 5032 // mOldCursorPos is unchanged. 5033 } 5034 5035 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5036 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5037 // Apply the edit if it is still valid. 5038 if (isValidRange(text, deleteFrom, deleteTo) && 5039 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5040 if (deleteFrom != deleteTo) { 5041 text.delete(deleteFrom, deleteTo); 5042 } 5043 if (newText.length() != 0) { 5044 text.insert(newTextInsertAt, newText); 5045 } 5046 } 5047 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5048 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5049 // TODO: Select all the text that was undone. 5050 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5051 Selection.setSelection(text, newCursorPos); 5052 } 5053 } 5054 5055 private String getTypeString() { 5056 switch (mType) { 5057 case TYPE_INSERT: 5058 return "insert"; 5059 case TYPE_DELETE: 5060 return "delete"; 5061 case TYPE_REPLACE: 5062 return "replace"; 5063 default: 5064 return ""; 5065 } 5066 } 5067 5068 @Override 5069 public String toString() { 5070 return "[mType=" + getTypeString() + ", " + 5071 "mOldText=" + mOldText + ", " + 5072 "mOldTextStart=" + mOldTextStart + ", " + 5073 "mNewText=" + mNewText + ", " + 5074 "mNewTextStart=" + mNewTextStart + ", " + 5075 "mOldCursorPos=" + mOldCursorPos + ", " + 5076 "mNewCursorPos=" + mNewCursorPos + "]"; 5077 } 5078 5079 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5080 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5081 @Override 5082 public EditOperation createFromParcel(Parcel in) { 5083 return new EditOperation(in, null); 5084 } 5085 5086 @Override 5087 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5088 return new EditOperation(in, loader); 5089 } 5090 5091 @Override 5092 public EditOperation[] newArray(int size) { 5093 return new EditOperation[size]; 5094 } 5095 }; 5096 } 5097} 5098