Editor.java revision fa2d7b1f21641a94134906bbadcf1cdcef54697e
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.IntDef; 21import android.annotation.NonNull; 22import android.annotation.Nullable; 23import android.app.PendingIntent; 24import android.app.PendingIntent.CanceledException; 25import android.content.ClipData; 26import android.content.ClipData.Item; 27import android.content.Context; 28import android.content.Intent; 29import android.content.UndoManager; 30import android.content.UndoOperation; 31import android.content.UndoOwner; 32import android.content.pm.PackageManager; 33import android.content.pm.ResolveInfo; 34import android.content.res.TypedArray; 35import android.graphics.Canvas; 36import android.graphics.Color; 37import android.graphics.Matrix; 38import android.graphics.Paint; 39import android.graphics.Path; 40import android.graphics.Rect; 41import android.graphics.RectF; 42import android.graphics.drawable.ColorDrawable; 43import android.graphics.drawable.Drawable; 44import android.os.Bundle; 45import android.os.LocaleList; 46import android.os.Parcel; 47import android.os.Parcelable; 48import android.os.ParcelableParcel; 49import android.os.SystemClock; 50import android.provider.Settings; 51import android.text.DynamicLayout; 52import android.text.Editable; 53import android.text.InputFilter; 54import android.text.InputType; 55import android.text.Layout; 56import android.text.ParcelableSpan; 57import android.text.Selection; 58import android.text.SpanWatcher; 59import android.text.Spannable; 60import android.text.SpannableStringBuilder; 61import android.text.Spanned; 62import android.text.StaticLayout; 63import android.text.TextUtils; 64import android.text.method.KeyListener; 65import android.text.method.MetaKeyKeyListener; 66import android.text.method.MovementMethod; 67import android.text.method.WordIterator; 68import android.text.style.EasyEditSpan; 69import android.text.style.SuggestionRangeSpan; 70import android.text.style.SuggestionSpan; 71import android.text.style.TextAppearanceSpan; 72import android.text.style.URLSpan; 73import android.util.DisplayMetrics; 74import android.util.Log; 75import android.util.SparseArray; 76import android.view.ActionMode; 77import android.view.ActionMode.Callback; 78import android.view.ContextMenu; 79import android.view.ContextThemeWrapper; 80import android.view.DisplayListCanvas; 81import android.view.DragAndDropPermissions; 82import android.view.DragEvent; 83import android.view.Gravity; 84import android.view.InputDevice; 85import android.view.LayoutInflater; 86import android.view.Menu; 87import android.view.MenuItem; 88import android.view.MotionEvent; 89import android.view.RenderNode; 90import android.view.SubMenu; 91import android.view.View; 92import android.view.View.DragShadowBuilder; 93import android.view.View.OnClickListener; 94import android.view.ViewConfiguration; 95import android.view.ViewGroup; 96import android.view.ViewGroup.LayoutParams; 97import android.view.ViewParent; 98import android.view.ViewTreeObserver; 99import android.view.WindowManager; 100import android.view.accessibility.AccessibilityNodeInfo; 101import android.view.inputmethod.CorrectionInfo; 102import android.view.inputmethod.CursorAnchorInfo; 103import android.view.inputmethod.EditorInfo; 104import android.view.inputmethod.ExtractedText; 105import android.view.inputmethod.ExtractedTextRequest; 106import android.view.inputmethod.InputConnection; 107import android.view.inputmethod.InputMethodManager; 108import android.widget.AdapterView.OnItemClickListener; 109import android.widget.TextView.Drawables; 110import android.widget.TextView.OnEditorActionListener; 111 112import com.android.internal.annotations.VisibleForTesting; 113import com.android.internal.util.ArrayUtils; 114import com.android.internal.util.GrowingArrayUtils; 115import com.android.internal.util.Preconditions; 116import com.android.internal.widget.EditableInputConnection; 117 118import java.lang.annotation.Retention; 119import java.lang.annotation.RetentionPolicy; 120import java.text.BreakIterator; 121import java.util.ArrayList; 122import java.util.Arrays; 123import java.util.Comparator; 124import java.util.HashMap; 125import java.util.List; 126 127 128/** 129 * Helper class used by TextView to handle editable text views. 130 * 131 * @hide 132 */ 133public class Editor { 134 private static final String TAG = "Editor"; 135 private static final boolean DEBUG_UNDO = false; 136 137 static final int BLINK = 500; 138 private static final float[] TEMP_POSITION = new float[2]; 139 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 140 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 141 private static final int UNSET_X_VALUE = -1; 142 private static final int UNSET_LINE = -1; 143 // Tag used when the Editor maintains its own separate UndoManager. 144 private static final String UNDO_OWNER_TAG = "Editor"; 145 146 // Ordering constants used to place the Action Mode or context menu items in their menu. 147 private static final int MENU_ITEM_ORDER_UNDO = 1; 148 private static final int MENU_ITEM_ORDER_REDO = 2; 149 private static final int MENU_ITEM_ORDER_CUT = 3; 150 private static final int MENU_ITEM_ORDER_COPY = 4; 151 private static final int MENU_ITEM_ORDER_PASTE = 5; 152 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 6; 153 private static final int MENU_ITEM_ORDER_SHARE = 7; 154 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 155 private static final int MENU_ITEM_ORDER_REPLACE = 9; 156 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 10; 157 158 // Each Editor manages its own undo stack. 159 private final UndoManager mUndoManager = new UndoManager(); 160 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 161 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 162 boolean mAllowUndo = true; 163 164 // Cursor Controllers. 165 private InsertionPointCursorController mInsertionPointCursorController; 166 SelectionModifierCursorController mSelectionModifierCursorController; 167 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 168 ActionMode mTextActionMode; 169 private boolean mInsertionControllerEnabled; 170 private boolean mSelectionControllerEnabled; 171 172 // Used to highlight a word when it is corrected by the IME 173 private CorrectionHighlighter mCorrectionHighlighter; 174 175 InputContentType mInputContentType; 176 InputMethodState mInputMethodState; 177 178 private static class TextRenderNode { 179 RenderNode renderNode; 180 boolean isDirty; 181 public TextRenderNode(String name) { 182 isDirty = true; 183 renderNode = RenderNode.create(name, null); 184 } 185 boolean needsRecord() { return isDirty || !renderNode.isValid(); } 186 } 187 private TextRenderNode[] mTextRenderNodes; 188 189 boolean mFrozenWithFocus; 190 boolean mSelectionMoved; 191 boolean mTouchFocusSelected; 192 193 KeyListener mKeyListener; 194 int mInputType = EditorInfo.TYPE_NULL; 195 196 boolean mDiscardNextActionUp; 197 boolean mIgnoreActionUpEvent; 198 199 long mShowCursor; 200 private Blink mBlink; 201 202 boolean mCursorVisible = true; 203 boolean mSelectAllOnFocus; 204 boolean mTextIsSelectable; 205 206 CharSequence mError; 207 boolean mErrorWasChanged; 208 private ErrorPopup mErrorPopup; 209 210 /** 211 * This flag is set if the TextView tries to display an error before it 212 * is attached to the window (so its position is still unknown). 213 * It causes the error to be shown later, when onAttachedToWindow() 214 * is called. 215 */ 216 private boolean mShowErrorAfterAttach; 217 218 boolean mInBatchEditControllers; 219 boolean mShowSoftInputOnFocus = true; 220 private boolean mPreserveSelection; 221 private boolean mRestartActionModeOnNextRefresh; 222 223 boolean mIsBeingLongClicked; 224 225 private SuggestionsPopupWindow mSuggestionsPopupWindow; 226 SuggestionRangeSpan mSuggestionRangeSpan; 227 private Runnable mShowSuggestionRunnable; 228 229 final Drawable[] mCursorDrawable = new Drawable[2]; 230 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 231 232 private Drawable mSelectHandleLeft; 233 private Drawable mSelectHandleRight; 234 private Drawable mSelectHandleCenter; 235 236 // Global listener that detects changes in the global position of the TextView 237 private PositionListener mPositionListener; 238 239 private float mLastDownPositionX, mLastDownPositionY; 240 private float mContextMenuAnchorX, mContextMenuAnchorY; 241 Callback mCustomSelectionActionModeCallback; 242 Callback mCustomInsertionActionModeCallback; 243 244 // Set when this TextView gained focus with some text selected. Will start selection mode. 245 boolean mCreatedWithASelection; 246 247 // Indicates the current tap state (first tap, double tap, or triple click). 248 private int mTapState = TAP_STATE_INITIAL; 249 private long mLastTouchUpTime = 0; 250 private static final int TAP_STATE_INITIAL = 0; 251 private static final int TAP_STATE_FIRST_TAP = 1; 252 private static final int TAP_STATE_DOUBLE_TAP = 2; 253 // Only for mouse input. 254 private static final int TAP_STATE_TRIPLE_CLICK = 3; 255 256 // The button state as of the last time #onTouchEvent is called. 257 private int mLastButtonState; 258 259 private Runnable mInsertionActionModeRunnable; 260 261 // The span controller helps monitoring the changes to which the Editor needs to react: 262 // - EasyEditSpans, for which we have some UI to display on attach and on hide 263 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 264 private SpanController mSpanController; 265 266 private WordIterator mWordIterator; 267 SpellChecker mSpellChecker; 268 269 // This word iterator is set with text and used to determine word boundaries 270 // when a user is selecting text. 271 private WordIterator mWordIteratorWithText; 272 // Indicate that the text in the word iterator needs to be updated. 273 private boolean mUpdateWordIteratorText; 274 275 private Rect mTempRect; 276 277 private TextView mTextView; 278 279 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 280 281 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 282 283 private final Runnable mShowFloatingToolbar = new Runnable() { 284 @Override 285 public void run() { 286 if (mTextActionMode != null) { 287 mTextActionMode.hide(0); // hide off. 288 } 289 } 290 }; 291 292 boolean mIsInsertionActionModeStartPending = false; 293 294 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 295 296 Editor(TextView textView) { 297 mTextView = textView; 298 // Synchronize the filter list, which places the undo input filter at the end. 299 mTextView.setFilters(mTextView.getFilters()); 300 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 301 } 302 303 ParcelableParcel saveInstanceState() { 304 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 305 Parcel parcel = state.getParcel(); 306 mUndoManager.saveInstanceState(parcel); 307 mUndoInputFilter.saveInstanceState(parcel); 308 return state; 309 } 310 311 void restoreInstanceState(ParcelableParcel state) { 312 Parcel parcel = state.getParcel(); 313 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 314 mUndoInputFilter.restoreInstanceState(parcel); 315 // Re-associate this object as the owner of undo state. 316 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 317 } 318 319 /** 320 * Forgets all undo and redo operations for this Editor. 321 */ 322 void forgetUndoRedo() { 323 UndoOwner[] owners = { mUndoOwner }; 324 mUndoManager.forgetUndos(owners, -1 /* all */); 325 mUndoManager.forgetRedos(owners, -1 /* all */); 326 } 327 328 boolean canUndo() { 329 UndoOwner[] owners = { mUndoOwner }; 330 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 331 } 332 333 boolean canRedo() { 334 UndoOwner[] owners = { mUndoOwner }; 335 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 336 } 337 338 void undo() { 339 if (!mAllowUndo) { 340 return; 341 } 342 UndoOwner[] owners = { mUndoOwner }; 343 mUndoManager.undo(owners, 1); // Undo 1 action. 344 } 345 346 void redo() { 347 if (!mAllowUndo) { 348 return; 349 } 350 UndoOwner[] owners = { mUndoOwner }; 351 mUndoManager.redo(owners, 1); // Redo 1 action. 352 } 353 354 void replace() { 355 if (mSuggestionsPopupWindow == null) { 356 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 357 } 358 hideCursorAndSpanControllers(); 359 mSuggestionsPopupWindow.show(); 360 361 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 362 Selection.setSelection((Spannable) mTextView.getText(), middle); 363 } 364 365 void onAttachedToWindow() { 366 if (mShowErrorAfterAttach) { 367 showError(); 368 mShowErrorAfterAttach = false; 369 } 370 371 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 372 // No need to create the controller. 373 // The get method will add the listener on controller creation. 374 if (mInsertionPointCursorController != null) { 375 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 376 } 377 if (mSelectionModifierCursorController != null) { 378 mSelectionModifierCursorController.resetTouchOffsets(); 379 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 380 } 381 updateSpellCheckSpans(0, mTextView.getText().length(), 382 true /* create the spell checker if needed */); 383 384 if (mTextView.hasSelection()) { 385 refreshTextActionMode(); 386 } 387 388 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 389 resumeBlink(); 390 } 391 392 void onDetachedFromWindow() { 393 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 394 395 if (mError != null) { 396 hideError(); 397 } 398 399 suspendBlink(); 400 401 if (mInsertionPointCursorController != null) { 402 mInsertionPointCursorController.onDetached(); 403 } 404 405 if (mSelectionModifierCursorController != null) { 406 mSelectionModifierCursorController.onDetached(); 407 } 408 409 if (mShowSuggestionRunnable != null) { 410 mTextView.removeCallbacks(mShowSuggestionRunnable); 411 } 412 413 // Cancel the single tap delayed runnable. 414 if (mInsertionActionModeRunnable != null) { 415 mTextView.removeCallbacks(mInsertionActionModeRunnable); 416 } 417 418 mTextView.removeCallbacks(mShowFloatingToolbar); 419 420 discardTextDisplayLists(); 421 422 if (mSpellChecker != null) { 423 mSpellChecker.closeSession(); 424 // Forces the creation of a new SpellChecker next time this window is created. 425 // Will handle the cases where the settings has been changed in the meantime. 426 mSpellChecker = null; 427 } 428 429 hideCursorAndSpanControllers(); 430 stopTextActionModeWithPreservingSelection(); 431 } 432 433 private void discardTextDisplayLists() { 434 if (mTextRenderNodes != null) { 435 for (int i = 0; i < mTextRenderNodes.length; i++) { 436 RenderNode displayList = mTextRenderNodes[i] != null 437 ? mTextRenderNodes[i].renderNode : null; 438 if (displayList != null && displayList.isValid()) { 439 displayList.discardDisplayList(); 440 } 441 } 442 } 443 } 444 445 private void showError() { 446 if (mTextView.getWindowToken() == null) { 447 mShowErrorAfterAttach = true; 448 return; 449 } 450 451 if (mErrorPopup == null) { 452 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 453 final TextView err = (TextView) inflater.inflate( 454 com.android.internal.R.layout.textview_hint, null); 455 456 final float scale = mTextView.getResources().getDisplayMetrics().density; 457 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 458 mErrorPopup.setFocusable(false); 459 // The user is entering text, so the input method is needed. We 460 // don't want the popup to be displayed on top of it. 461 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 462 } 463 464 TextView tv = (TextView) mErrorPopup.getContentView(); 465 chooseSize(mErrorPopup, mError, tv); 466 tv.setText(mError); 467 468 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 469 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 470 } 471 472 public void setError(CharSequence error, Drawable icon) { 473 mError = TextUtils.stringOrSpannedString(error); 474 mErrorWasChanged = true; 475 476 if (mError == null) { 477 setErrorIcon(null); 478 if (mErrorPopup != null) { 479 if (mErrorPopup.isShowing()) { 480 mErrorPopup.dismiss(); 481 } 482 483 mErrorPopup = null; 484 } 485 mShowErrorAfterAttach = false; 486 } else { 487 setErrorIcon(icon); 488 if (mTextView.isFocused()) { 489 showError(); 490 } 491 } 492 } 493 494 private void setErrorIcon(Drawable icon) { 495 Drawables dr = mTextView.mDrawables; 496 if (dr == null) { 497 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 498 } 499 dr.setErrorDrawable(icon, mTextView); 500 501 mTextView.resetResolvedDrawables(); 502 mTextView.invalidate(); 503 mTextView.requestLayout(); 504 } 505 506 private void hideError() { 507 if (mErrorPopup != null) { 508 if (mErrorPopup.isShowing()) { 509 mErrorPopup.dismiss(); 510 } 511 } 512 513 mShowErrorAfterAttach = false; 514 } 515 516 /** 517 * Returns the X offset to make the pointy top of the error point 518 * at the middle of the error icon. 519 */ 520 private int getErrorX() { 521 /* 522 * The "25" is the distance between the point and the right edge 523 * of the background 524 */ 525 final float scale = mTextView.getResources().getDisplayMetrics().density; 526 527 final Drawables dr = mTextView.mDrawables; 528 529 final int layoutDirection = mTextView.getLayoutDirection(); 530 int errorX; 531 int offset; 532 switch (layoutDirection) { 533 default: 534 case View.LAYOUT_DIRECTION_LTR: 535 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 536 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 537 mTextView.getPaddingRight() + offset; 538 break; 539 case View.LAYOUT_DIRECTION_RTL: 540 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 541 errorX = mTextView.getPaddingLeft() + offset; 542 break; 543 } 544 return errorX; 545 } 546 547 /** 548 * Returns the Y offset to make the pointy top of the error point 549 * at the bottom of the error icon. 550 */ 551 private int getErrorY() { 552 /* 553 * Compound, not extended, because the icon is not clipped 554 * if the text height is smaller. 555 */ 556 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 557 int vspace = mTextView.getBottom() - mTextView.getTop() - 558 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 559 560 final Drawables dr = mTextView.mDrawables; 561 562 final int layoutDirection = mTextView.getLayoutDirection(); 563 int height; 564 switch (layoutDirection) { 565 default: 566 case View.LAYOUT_DIRECTION_LTR: 567 height = (dr != null ? dr.mDrawableHeightRight : 0); 568 break; 569 case View.LAYOUT_DIRECTION_RTL: 570 height = (dr != null ? dr.mDrawableHeightLeft : 0); 571 break; 572 } 573 574 int icontop = compoundPaddingTop + (vspace - height) / 2; 575 576 /* 577 * The "2" is the distance between the point and the top edge 578 * of the background. 579 */ 580 final float scale = mTextView.getResources().getDisplayMetrics().density; 581 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 582 } 583 584 void createInputContentTypeIfNeeded() { 585 if (mInputContentType == null) { 586 mInputContentType = new InputContentType(); 587 } 588 } 589 590 void createInputMethodStateIfNeeded() { 591 if (mInputMethodState == null) { 592 mInputMethodState = new InputMethodState(); 593 } 594 } 595 596 boolean isCursorVisible() { 597 // The default value is true, even when there is no associated Editor 598 return mCursorVisible && mTextView.isTextEditable(); 599 } 600 601 void prepareCursorControllers() { 602 boolean windowSupportsHandles = false; 603 604 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 605 if (params instanceof WindowManager.LayoutParams) { 606 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 607 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 608 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 609 } 610 611 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 612 mInsertionControllerEnabled = enabled && isCursorVisible(); 613 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 614 615 if (!mInsertionControllerEnabled) { 616 hideInsertionPointCursorController(); 617 if (mInsertionPointCursorController != null) { 618 mInsertionPointCursorController.onDetached(); 619 mInsertionPointCursorController = null; 620 } 621 } 622 623 if (!mSelectionControllerEnabled) { 624 stopTextActionMode(); 625 if (mSelectionModifierCursorController != null) { 626 mSelectionModifierCursorController.onDetached(); 627 mSelectionModifierCursorController = null; 628 } 629 } 630 } 631 632 void hideInsertionPointCursorController() { 633 if (mInsertionPointCursorController != null) { 634 mInsertionPointCursorController.hide(); 635 } 636 } 637 638 /** 639 * Hides the insertion and span controllers. 640 */ 641 void hideCursorAndSpanControllers() { 642 hideCursorControllers(); 643 hideSpanControllers(); 644 } 645 646 private void hideSpanControllers() { 647 if (mSpanController != null) { 648 mSpanController.hide(); 649 } 650 } 651 652 private void hideCursorControllers() { 653 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 654 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 655 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 656 // to distinguish one from the other. 657 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) || 658 !mSuggestionsPopupWindow.isShowingUp())) { 659 // Should be done before hide insertion point controller since it triggers a show of it 660 mSuggestionsPopupWindow.hide(); 661 } 662 hideInsertionPointCursorController(); 663 } 664 665 /** 666 * Create new SpellCheckSpans on the modified region. 667 */ 668 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 669 // Remove spans whose adjacent characters are text not punctuation 670 mTextView.removeAdjacentSuggestionSpans(start); 671 mTextView.removeAdjacentSuggestionSpans(end); 672 673 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 674 !(mTextView.isInExtractedMode())) { 675 if (mSpellChecker == null && createSpellChecker) { 676 mSpellChecker = new SpellChecker(mTextView); 677 } 678 if (mSpellChecker != null) { 679 mSpellChecker.spellCheck(start, end); 680 } 681 } 682 } 683 684 void onScreenStateChanged(int screenState) { 685 switch (screenState) { 686 case View.SCREEN_STATE_ON: 687 resumeBlink(); 688 break; 689 case View.SCREEN_STATE_OFF: 690 suspendBlink(); 691 break; 692 } 693 } 694 695 private void suspendBlink() { 696 if (mBlink != null) { 697 mBlink.cancel(); 698 } 699 } 700 701 private void resumeBlink() { 702 if (mBlink != null) { 703 mBlink.uncancel(); 704 makeBlink(); 705 } 706 } 707 708 void adjustInputType(boolean password, boolean passwordInputType, 709 boolean webPasswordInputType, boolean numberPasswordInputType) { 710 // mInputType has been set from inputType, possibly modified by mInputMethod. 711 // Specialize mInputType to [web]password if we have a text class and the original input 712 // type was a password. 713 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 714 if (password || passwordInputType) { 715 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 716 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 717 } 718 if (webPasswordInputType) { 719 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 720 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 721 } 722 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 723 if (numberPasswordInputType) { 724 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 725 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 726 } 727 } 728 } 729 730 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 731 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 732 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 733 734 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 735 com.android.internal.R.dimen.textview_error_popup_default_width); 736 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 737 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 738 float max = 0; 739 for (int i = 0; i < l.getLineCount(); i++) { 740 max = Math.max(max, l.getLineWidth(i)); 741 } 742 743 /* 744 * Now set the popup size to be big enough for the text plus the border capped 745 * to DEFAULT_MAX_POPUP_WIDTH 746 */ 747 pop.setWidth(wid + (int) Math.ceil(max)); 748 pop.setHeight(ht + l.getHeight()); 749 } 750 751 void setFrame() { 752 if (mErrorPopup != null) { 753 TextView tv = (TextView) mErrorPopup.getContentView(); 754 chooseSize(mErrorPopup, mError, tv); 755 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 756 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 757 } 758 } 759 760 private int getWordStart(int offset) { 761 // FIXME - For this and similar methods we're not doing anything to check if there's 762 // a LocaleSpan in the text, this may be something we should try handling or checking for. 763 int retOffset = getWordIteratorWithText().prevBoundary(offset); 764 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 765 // On punctuation boundary or within group of punctuation, find punctuation start. 766 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 767 } else { 768 // Not on a punctuation boundary, find the word start. 769 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 770 } 771 if (retOffset == BreakIterator.DONE) { 772 return offset; 773 } 774 return retOffset; 775 } 776 777 private int getWordEnd(int offset) { 778 int retOffset = getWordIteratorWithText().nextBoundary(offset); 779 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 780 // On punctuation boundary or within group of punctuation, find punctuation end. 781 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 782 } else { 783 // Not on a punctuation boundary, find the word end. 784 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 785 } 786 if (retOffset == BreakIterator.DONE) { 787 return offset; 788 } 789 return retOffset; 790 } 791 792 private boolean needsToSelectAllToSelectWordOrParagraph() { 793 if (mTextView.hasPasswordTransformationMethod()) { 794 // Always select all on a password field. 795 // Cut/copy menu entries are not available for passwords, but being able to select all 796 // is however useful to delete or paste to replace the entire content. 797 return true; 798 } 799 800 int inputType = mTextView.getInputType(); 801 int klass = inputType & InputType.TYPE_MASK_CLASS; 802 int variation = inputType & InputType.TYPE_MASK_VARIATION; 803 804 // Specific text field types: select the entire text for these 805 if (klass == InputType.TYPE_CLASS_NUMBER || 806 klass == InputType.TYPE_CLASS_PHONE || 807 klass == InputType.TYPE_CLASS_DATETIME || 808 variation == InputType.TYPE_TEXT_VARIATION_URI || 809 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 810 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 811 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 812 return true; 813 } 814 return false; 815 } 816 817 /** 818 * Adjusts selection to the word under last touch offset. Return true if the operation was 819 * successfully performed. 820 */ 821 private boolean selectCurrentWord() { 822 if (!mTextView.canSelectText()) { 823 return false; 824 } 825 826 if (needsToSelectAllToSelectWordOrParagraph()) { 827 return mTextView.selectAllText(); 828 } 829 830 long lastTouchOffsets = getLastTouchOffsets(); 831 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 832 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 833 834 // Safety check in case standard touch event handling has been bypassed 835 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 836 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 837 838 int selectionStart, selectionEnd; 839 840 // If a URLSpan (web address, email, phone...) is found at that position, select it. 841 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 842 getSpans(minOffset, maxOffset, URLSpan.class); 843 if (urlSpans.length >= 1) { 844 URLSpan urlSpan = urlSpans[0]; 845 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 846 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 847 } else { 848 // FIXME - We should check if there's a LocaleSpan in the text, this may be 849 // something we should try handling or checking for. 850 final WordIterator wordIterator = getWordIterator(); 851 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 852 853 selectionStart = wordIterator.getBeginning(minOffset); 854 selectionEnd = wordIterator.getEnd(maxOffset); 855 856 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 857 selectionStart == selectionEnd) { 858 // Possible when the word iterator does not properly handle the text's language 859 long range = getCharClusterRange(minOffset); 860 selectionStart = TextUtils.unpackRangeStartFromLong(range); 861 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 862 } 863 } 864 865 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 866 return selectionEnd > selectionStart; 867 } 868 869 /** 870 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 871 * successfully performed. 872 */ 873 private boolean selectCurrentParagraph() { 874 if (!mTextView.canSelectText()) { 875 return false; 876 } 877 878 if (needsToSelectAllToSelectWordOrParagraph()) { 879 return mTextView.selectAllText(); 880 } 881 882 long lastTouchOffsets = getLastTouchOffsets(); 883 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 884 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 885 886 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 887 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 888 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 889 if (start < end) { 890 Selection.setSelection((Spannable) mTextView.getText(), start, end); 891 return true; 892 } 893 return false; 894 } 895 896 /** 897 * Get the minimum range of paragraphs that contains startOffset and endOffset. 898 */ 899 private long getParagraphsRange(int startOffset, int endOffset) { 900 final Layout layout = mTextView.getLayout(); 901 if (layout == null) { 902 return TextUtils.packRangeInLong(-1, -1); 903 } 904 final CharSequence text = mTextView.getText(); 905 int minLine = layout.getLineForOffset(startOffset); 906 // Search paragraph start. 907 while (minLine > 0) { 908 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 909 if (text.charAt(prevLineEndOffset - 1) == '\n') { 910 break; 911 } 912 minLine--; 913 } 914 int maxLine = layout.getLineForOffset(endOffset); 915 // Search paragraph end. 916 while (maxLine < layout.getLineCount() - 1) { 917 final int lineEndOffset = layout.getLineEnd(maxLine); 918 if (text.charAt(lineEndOffset - 1) == '\n') { 919 break; 920 } 921 maxLine++; 922 } 923 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 924 } 925 926 void onLocaleChanged() { 927 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 928 // proper new locale 929 mWordIterator = null; 930 mWordIteratorWithText = null; 931 } 932 933 public WordIterator getWordIterator() { 934 if (mWordIterator == null) { 935 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 936 } 937 return mWordIterator; 938 } 939 940 private WordIterator getWordIteratorWithText() { 941 if (mWordIteratorWithText == null) { 942 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 943 mUpdateWordIteratorText = true; 944 } 945 if (mUpdateWordIteratorText) { 946 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 947 // to the user's selection is needed. A possible solution would be to 948 // copy some number N of characters near the selection and then when the 949 // user approaches N then we'd do another copy of the next N characters. 950 CharSequence text = mTextView.getText(); 951 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 952 mUpdateWordIteratorText = false; 953 } 954 return mWordIteratorWithText; 955 } 956 957 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 958 final Layout layout = mTextView.getLayout(); 959 if (layout == null) return offset; 960 return findAfterGivenOffset == layout.isRtlCharAt(offset) ? 961 layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 962 } 963 964 private long getCharClusterRange(int offset) { 965 final int textLength = mTextView.getText().length(); 966 if (offset < textLength) { 967 final int clusterEndOffset = getNextCursorOffset(offset, true); 968 return TextUtils.packRangeInLong( 969 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 970 } 971 if (offset - 1 >= 0) { 972 final int clusterStartOffset = getNextCursorOffset(offset, false); 973 return TextUtils.packRangeInLong(clusterStartOffset, 974 getNextCursorOffset(clusterStartOffset, true)); 975 } 976 return TextUtils.packRangeInLong(offset, offset); 977 } 978 979 private boolean touchPositionIsInSelection() { 980 int selectionStart = mTextView.getSelectionStart(); 981 int selectionEnd = mTextView.getSelectionEnd(); 982 983 if (selectionStart == selectionEnd) { 984 return false; 985 } 986 987 if (selectionStart > selectionEnd) { 988 int tmp = selectionStart; 989 selectionStart = selectionEnd; 990 selectionEnd = tmp; 991 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 992 } 993 994 SelectionModifierCursorController selectionController = getSelectionController(); 995 int minOffset = selectionController.getMinTouchOffset(); 996 int maxOffset = selectionController.getMaxTouchOffset(); 997 998 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 999 } 1000 1001 private PositionListener getPositionListener() { 1002 if (mPositionListener == null) { 1003 mPositionListener = new PositionListener(); 1004 } 1005 return mPositionListener; 1006 } 1007 1008 private interface TextViewPositionListener { 1009 public void updatePosition(int parentPositionX, int parentPositionY, 1010 boolean parentPositionChanged, boolean parentScrolled); 1011 } 1012 1013 private boolean isPositionVisible(final float positionX, final float positionY) { 1014 synchronized (TEMP_POSITION) { 1015 final float[] position = TEMP_POSITION; 1016 position[0] = positionX; 1017 position[1] = positionY; 1018 View view = mTextView; 1019 1020 while (view != null) { 1021 if (view != mTextView) { 1022 // Local scroll is already taken into account in positionX/Y 1023 position[0] -= view.getScrollX(); 1024 position[1] -= view.getScrollY(); 1025 } 1026 1027 if (position[0] < 0 || position[1] < 0 || 1028 position[0] > view.getWidth() || position[1] > view.getHeight()) { 1029 return false; 1030 } 1031 1032 if (!view.getMatrix().isIdentity()) { 1033 view.getMatrix().mapPoints(position); 1034 } 1035 1036 position[0] += view.getLeft(); 1037 position[1] += view.getTop(); 1038 1039 final ViewParent parent = view.getParent(); 1040 if (parent instanceof View) { 1041 view = (View) parent; 1042 } else { 1043 // We've reached the ViewRoot, stop iterating 1044 view = null; 1045 } 1046 } 1047 } 1048 1049 // We've been able to walk up the view hierarchy and the position was never clipped 1050 return true; 1051 } 1052 1053 private boolean isOffsetVisible(int offset) { 1054 Layout layout = mTextView.getLayout(); 1055 if (layout == null) return false; 1056 1057 final int line = layout.getLineForOffset(offset); 1058 final int lineBottom = layout.getLineBottom(line); 1059 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1060 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1061 lineBottom + mTextView.viewportToContentVerticalOffset()); 1062 } 1063 1064 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1065 * in the view. Returns false when the position is in the empty space of left/right of text. 1066 */ 1067 private boolean isPositionOnText(float x, float y) { 1068 Layout layout = mTextView.getLayout(); 1069 if (layout == null) return false; 1070 1071 final int line = mTextView.getLineAtCoordinate(y); 1072 x = mTextView.convertToLocalHorizontalCoordinate(x); 1073 1074 if (x < layout.getLineLeft(line)) return false; 1075 if (x > layout.getLineRight(line)) return false; 1076 return true; 1077 } 1078 1079 private void startDragAndDrop() { 1080 // TODO: Fix drag and drop in full screen extracted mode. 1081 if (mTextView.isInExtractedMode()) { 1082 return; 1083 } 1084 final int start = mTextView.getSelectionStart(); 1085 final int end = mTextView.getSelectionEnd(); 1086 CharSequence selectedText = mTextView.getTransformedText(start, end); 1087 ClipData data = ClipData.newPlainText(null, selectedText); 1088 DragLocalState localState = new DragLocalState(mTextView, start, end); 1089 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1090 View.DRAG_FLAG_GLOBAL); 1091 stopTextActionMode(); 1092 if (hasSelectionController()) { 1093 getSelectionController().resetTouchOffsets(); 1094 } 1095 } 1096 1097 public boolean performLongClick(boolean handled) { 1098 // Long press in empty space moves cursor and starts the insertion action mode. 1099 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 1100 mInsertionControllerEnabled) { 1101 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1102 mLastDownPositionY); 1103 Selection.setSelection((Spannable) mTextView.getText(), offset); 1104 getInsertionController().show(); 1105 mIsInsertionActionModeStartPending = true; 1106 handled = true; 1107 } 1108 1109 if (!handled && mTextActionMode != null) { 1110 if (touchPositionIsInSelection()) { 1111 startDragAndDrop(); 1112 } else { 1113 stopTextActionMode(); 1114 selectCurrentWordAndStartDrag(); 1115 } 1116 handled = true; 1117 } 1118 1119 // Start a new selection 1120 if (!handled) { 1121 handled = selectCurrentWordAndStartDrag(); 1122 } 1123 1124 return handled; 1125 } 1126 1127 private long getLastTouchOffsets() { 1128 SelectionModifierCursorController selectionController = getSelectionController(); 1129 final int minOffset = selectionController.getMinTouchOffset(); 1130 final int maxOffset = selectionController.getMaxTouchOffset(); 1131 return TextUtils.packRangeInLong(minOffset, maxOffset); 1132 } 1133 1134 void onFocusChanged(boolean focused, int direction) { 1135 mShowCursor = SystemClock.uptimeMillis(); 1136 ensureEndedBatchEdit(); 1137 1138 if (focused) { 1139 int selStart = mTextView.getSelectionStart(); 1140 int selEnd = mTextView.getSelectionEnd(); 1141 1142 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1143 // mode for these, unless there was a specific selection already started. 1144 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1145 selEnd == mTextView.getText().length(); 1146 1147 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1148 !isFocusHighlighted; 1149 1150 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1151 // If a tap was used to give focus to that view, move cursor at tap position. 1152 // Has to be done before onTakeFocus, which can be overloaded. 1153 final int lastTapPosition = getLastTapPosition(); 1154 if (lastTapPosition >= 0) { 1155 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1156 } 1157 1158 // Note this may have to be moved out of the Editor class 1159 MovementMethod mMovement = mTextView.getMovementMethod(); 1160 if (mMovement != null) { 1161 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1162 } 1163 1164 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1165 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1166 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1167 // This special case ensure that we keep current selection in that case. 1168 // It would be better to know why the DecorView does not have focus at that time. 1169 if (((mTextView.isInExtractedMode()) || mSelectionMoved) && 1170 selStart >= 0 && selEnd >= 0) { 1171 /* 1172 * Someone intentionally set the selection, so let them 1173 * do whatever it is that they wanted to do instead of 1174 * the default on-focus behavior. We reset the selection 1175 * here instead of just skipping the onTakeFocus() call 1176 * because some movement methods do something other than 1177 * just setting the selection in theirs and we still 1178 * need to go through that path. 1179 */ 1180 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1181 } 1182 1183 if (mSelectAllOnFocus) { 1184 mTextView.selectAllText(); 1185 } 1186 1187 mTouchFocusSelected = true; 1188 } 1189 1190 mFrozenWithFocus = false; 1191 mSelectionMoved = false; 1192 1193 if (mError != null) { 1194 showError(); 1195 } 1196 1197 makeBlink(); 1198 } else { 1199 if (mError != null) { 1200 hideError(); 1201 } 1202 // Don't leave us in the middle of a batch edit. 1203 mTextView.onEndBatchEdit(); 1204 1205 if (mTextView.isInExtractedMode()) { 1206 hideCursorAndSpanControllers(); 1207 stopTextActionModeWithPreservingSelection(); 1208 } else { 1209 hideCursorAndSpanControllers(); 1210 if (mTextView.isTemporarilyDetached()) { 1211 stopTextActionModeWithPreservingSelection(); 1212 } else { 1213 stopTextActionMode(); 1214 } 1215 downgradeEasyCorrectionSpans(); 1216 } 1217 // No need to create the controller 1218 if (mSelectionModifierCursorController != null) { 1219 mSelectionModifierCursorController.resetTouchOffsets(); 1220 } 1221 } 1222 } 1223 1224 /** 1225 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1226 * span. 1227 */ 1228 private void downgradeEasyCorrectionSpans() { 1229 CharSequence text = mTextView.getText(); 1230 if (text instanceof Spannable) { 1231 Spannable spannable = (Spannable) text; 1232 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1233 spannable.length(), SuggestionSpan.class); 1234 for (int i = 0; i < suggestionSpans.length; i++) { 1235 int flags = suggestionSpans[i].getFlags(); 1236 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1237 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1238 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1239 suggestionSpans[i].setFlags(flags); 1240 } 1241 } 1242 } 1243 } 1244 1245 void sendOnTextChanged(int start, int after) { 1246 updateSpellCheckSpans(start, start + after, false); 1247 1248 // Flip flag to indicate the word iterator needs to have the text reset. 1249 mUpdateWordIteratorText = true; 1250 1251 // Hide the controllers as soon as text is modified (typing, procedural...) 1252 // We do not hide the span controllers, since they can be added when a new text is 1253 // inserted into the text view (voice IME). 1254 hideCursorControllers(); 1255 // Reset drag accelerator. 1256 if (mSelectionModifierCursorController != null) { 1257 mSelectionModifierCursorController.resetTouchOffsets(); 1258 } 1259 stopTextActionMode(); 1260 } 1261 1262 private int getLastTapPosition() { 1263 // No need to create the controller at that point, no last tap position saved 1264 if (mSelectionModifierCursorController != null) { 1265 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1266 if (lastTapPosition >= 0) { 1267 // Safety check, should not be possible. 1268 if (lastTapPosition > mTextView.getText().length()) { 1269 lastTapPosition = mTextView.getText().length(); 1270 } 1271 return lastTapPosition; 1272 } 1273 } 1274 1275 return -1; 1276 } 1277 1278 void onWindowFocusChanged(boolean hasWindowFocus) { 1279 if (hasWindowFocus) { 1280 if (mBlink != null) { 1281 mBlink.uncancel(); 1282 makeBlink(); 1283 } 1284 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1285 refreshTextActionMode(); 1286 } 1287 } else { 1288 if (mBlink != null) { 1289 mBlink.cancel(); 1290 } 1291 if (mInputContentType != null) { 1292 mInputContentType.enterDown = false; 1293 } 1294 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1295 hideCursorAndSpanControllers(); 1296 stopTextActionModeWithPreservingSelection(); 1297 if (mSuggestionsPopupWindow != null) { 1298 mSuggestionsPopupWindow.onParentLostFocus(); 1299 } 1300 1301 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1302 ensureEndedBatchEdit(); 1303 } 1304 } 1305 1306 private void updateTapState(MotionEvent event) { 1307 final int action = event.getActionMasked(); 1308 if (action == MotionEvent.ACTION_DOWN) { 1309 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1310 // Detect double tap and triple click. 1311 if (((mTapState == TAP_STATE_FIRST_TAP) 1312 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1313 && (SystemClock.uptimeMillis() - mLastTouchUpTime) <= 1314 ViewConfiguration.getDoubleTapTimeout()) { 1315 if (mTapState == TAP_STATE_FIRST_TAP) { 1316 mTapState = TAP_STATE_DOUBLE_TAP; 1317 } else { 1318 mTapState = TAP_STATE_TRIPLE_CLICK; 1319 } 1320 } else { 1321 mTapState = TAP_STATE_FIRST_TAP; 1322 } 1323 } 1324 if (action == MotionEvent.ACTION_UP) { 1325 mLastTouchUpTime = SystemClock.uptimeMillis(); 1326 } 1327 } 1328 1329 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1330 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1331 return false; 1332 } 1333 final boolean primaryButtonStateChanged = 1334 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1335 final int action = event.getActionMasked(); 1336 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1337 && !primaryButtonStateChanged) { 1338 return true; 1339 } 1340 if (action == MotionEvent.ACTION_MOVE 1341 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1342 return true; 1343 } 1344 return false; 1345 } 1346 1347 void onTouchEvent(MotionEvent event) { 1348 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1349 mLastButtonState = event.getButtonState(); 1350 if (filterOutEvent) { 1351 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1352 mDiscardNextActionUp = true; 1353 } 1354 return; 1355 } 1356 updateTapState(event); 1357 updateFloatingToolbarVisibility(event); 1358 1359 if (hasSelectionController()) { 1360 getSelectionController().onTouchEvent(event); 1361 } 1362 1363 if (mShowSuggestionRunnable != null) { 1364 mTextView.removeCallbacks(mShowSuggestionRunnable); 1365 mShowSuggestionRunnable = null; 1366 } 1367 1368 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1369 mLastDownPositionX = event.getX(); 1370 mLastDownPositionY = event.getY(); 1371 1372 // Reset this state; it will be re-set if super.onTouchEvent 1373 // causes focus to move to the view. 1374 mTouchFocusSelected = false; 1375 mIgnoreActionUpEvent = false; 1376 } 1377 } 1378 1379 private void updateFloatingToolbarVisibility(MotionEvent event) { 1380 if (mTextActionMode != null) { 1381 switch (event.getActionMasked()) { 1382 case MotionEvent.ACTION_MOVE: 1383 hideFloatingToolbar(); 1384 break; 1385 case MotionEvent.ACTION_UP: // fall through 1386 case MotionEvent.ACTION_CANCEL: 1387 showFloatingToolbar(); 1388 } 1389 } 1390 } 1391 1392 private void hideFloatingToolbar() { 1393 if (mTextActionMode != null) { 1394 mTextView.removeCallbacks(mShowFloatingToolbar); 1395 mTextActionMode.hide(ActionMode.DEFAULT_HIDE_DURATION); 1396 } 1397 } 1398 1399 private void showFloatingToolbar() { 1400 if (mTextActionMode != null) { 1401 // Delay "show" so it doesn't interfere with click confirmations 1402 // or double-clicks that could "dismiss" the floating toolbar. 1403 int delay = ViewConfiguration.getDoubleTapTimeout(); 1404 mTextView.postDelayed(mShowFloatingToolbar, delay); 1405 } 1406 } 1407 1408 public void beginBatchEdit() { 1409 mInBatchEditControllers = true; 1410 final InputMethodState ims = mInputMethodState; 1411 if (ims != null) { 1412 int nesting = ++ims.mBatchEditNesting; 1413 if (nesting == 1) { 1414 ims.mCursorChanged = false; 1415 ims.mChangedDelta = 0; 1416 if (ims.mContentChanged) { 1417 // We already have a pending change from somewhere else, 1418 // so turn this into a full update. 1419 ims.mChangedStart = 0; 1420 ims.mChangedEnd = mTextView.getText().length(); 1421 } else { 1422 ims.mChangedStart = EXTRACT_UNKNOWN; 1423 ims.mChangedEnd = EXTRACT_UNKNOWN; 1424 ims.mContentChanged = false; 1425 } 1426 mUndoInputFilter.beginBatchEdit(); 1427 mTextView.onBeginBatchEdit(); 1428 } 1429 } 1430 } 1431 1432 public void endBatchEdit() { 1433 mInBatchEditControllers = false; 1434 final InputMethodState ims = mInputMethodState; 1435 if (ims != null) { 1436 int nesting = --ims.mBatchEditNesting; 1437 if (nesting == 0) { 1438 finishBatchEdit(ims); 1439 } 1440 } 1441 } 1442 1443 void ensureEndedBatchEdit() { 1444 final InputMethodState ims = mInputMethodState; 1445 if (ims != null && ims.mBatchEditNesting != 0) { 1446 ims.mBatchEditNesting = 0; 1447 finishBatchEdit(ims); 1448 } 1449 } 1450 1451 void finishBatchEdit(final InputMethodState ims) { 1452 mTextView.onEndBatchEdit(); 1453 mUndoInputFilter.endBatchEdit(); 1454 1455 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1456 mTextView.updateAfterEdit(); 1457 reportExtractedText(); 1458 } else if (ims.mCursorChanged) { 1459 // Cheesy way to get us to report the current cursor location. 1460 mTextView.invalidateCursor(); 1461 } 1462 // sendUpdateSelection knows to avoid sending if the selection did 1463 // not actually change. 1464 sendUpdateSelection(); 1465 1466 // Show drag handles if they were blocked by batch edit mode. 1467 if (mTextActionMode != null) { 1468 final CursorController cursorController = mTextView.hasSelection() ? 1469 getSelectionController() : getInsertionController(); 1470 if (cursorController != null && !cursorController.isActive() 1471 && !cursorController.isCursorBeingModified()) { 1472 cursorController.show(); 1473 } 1474 } 1475 } 1476 1477 static final int EXTRACT_NOTHING = -2; 1478 static final int EXTRACT_UNKNOWN = -1; 1479 1480 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1481 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1482 EXTRACT_UNKNOWN, outText); 1483 } 1484 1485 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1486 int partialStartOffset, int partialEndOffset, int delta, 1487 @Nullable ExtractedText outText) { 1488 if (request == null || outText == null) { 1489 return false; 1490 } 1491 1492 final CharSequence content = mTextView.getText(); 1493 if (content == null) { 1494 return false; 1495 } 1496 1497 if (partialStartOffset != EXTRACT_NOTHING) { 1498 final int N = content.length(); 1499 if (partialStartOffset < 0) { 1500 outText.partialStartOffset = outText.partialEndOffset = -1; 1501 partialStartOffset = 0; 1502 partialEndOffset = N; 1503 } else { 1504 // Now use the delta to determine the actual amount of text 1505 // we need. 1506 partialEndOffset += delta; 1507 // Adjust offsets to ensure we contain full spans. 1508 if (content instanceof Spanned) { 1509 Spanned spanned = (Spanned)content; 1510 Object[] spans = spanned.getSpans(partialStartOffset, 1511 partialEndOffset, ParcelableSpan.class); 1512 int i = spans.length; 1513 while (i > 0) { 1514 i--; 1515 int j = spanned.getSpanStart(spans[i]); 1516 if (j < partialStartOffset) partialStartOffset = j; 1517 j = spanned.getSpanEnd(spans[i]); 1518 if (j > partialEndOffset) partialEndOffset = j; 1519 } 1520 } 1521 outText.partialStartOffset = partialStartOffset; 1522 outText.partialEndOffset = partialEndOffset - delta; 1523 1524 if (partialStartOffset > N) { 1525 partialStartOffset = N; 1526 } else if (partialStartOffset < 0) { 1527 partialStartOffset = 0; 1528 } 1529 if (partialEndOffset > N) { 1530 partialEndOffset = N; 1531 } else if (partialEndOffset < 0) { 1532 partialEndOffset = 0; 1533 } 1534 } 1535 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1536 outText.text = content.subSequence(partialStartOffset, 1537 partialEndOffset); 1538 } else { 1539 outText.text = TextUtils.substring(content, partialStartOffset, 1540 partialEndOffset); 1541 } 1542 } else { 1543 outText.partialStartOffset = 0; 1544 outText.partialEndOffset = 0; 1545 outText.text = ""; 1546 } 1547 outText.flags = 0; 1548 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1549 outText.flags |= ExtractedText.FLAG_SELECTING; 1550 } 1551 if (mTextView.isSingleLine()) { 1552 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1553 } 1554 outText.startOffset = 0; 1555 outText.selectionStart = mTextView.getSelectionStart(); 1556 outText.selectionEnd = mTextView.getSelectionEnd(); 1557 return true; 1558 } 1559 1560 boolean reportExtractedText() { 1561 final Editor.InputMethodState ims = mInputMethodState; 1562 if (ims != null) { 1563 final boolean contentChanged = ims.mContentChanged; 1564 if (contentChanged || ims.mSelectionModeChanged) { 1565 ims.mContentChanged = false; 1566 ims.mSelectionModeChanged = false; 1567 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1568 if (req != null) { 1569 InputMethodManager imm = InputMethodManager.peekInstance(); 1570 if (imm != null) { 1571 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1572 "Retrieving extracted start=" + ims.mChangedStart + 1573 " end=" + ims.mChangedEnd + 1574 " delta=" + ims.mChangedDelta); 1575 if (ims.mChangedStart < 0 && !contentChanged) { 1576 ims.mChangedStart = EXTRACT_NOTHING; 1577 } 1578 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1579 ims.mChangedDelta, ims.mExtractedText)) { 1580 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1581 "Reporting extracted start=" + 1582 ims.mExtractedText.partialStartOffset + 1583 " end=" + ims.mExtractedText.partialEndOffset + 1584 ": " + ims.mExtractedText.text); 1585 1586 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1587 ims.mChangedStart = EXTRACT_UNKNOWN; 1588 ims.mChangedEnd = EXTRACT_UNKNOWN; 1589 ims.mChangedDelta = 0; 1590 ims.mContentChanged = false; 1591 return true; 1592 } 1593 } 1594 } 1595 } 1596 } 1597 return false; 1598 } 1599 1600 private void sendUpdateSelection() { 1601 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1602 final InputMethodManager imm = InputMethodManager.peekInstance(); 1603 if (null != imm) { 1604 final int selectionStart = mTextView.getSelectionStart(); 1605 final int selectionEnd = mTextView.getSelectionEnd(); 1606 int candStart = -1; 1607 int candEnd = -1; 1608 if (mTextView.getText() instanceof Spannable) { 1609 final Spannable sp = (Spannable) mTextView.getText(); 1610 candStart = EditableInputConnection.getComposingSpanStart(sp); 1611 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1612 } 1613 // InputMethodManager#updateSelection skips sending the message if 1614 // none of the parameters have changed since the last time we called it. 1615 imm.updateSelection(mTextView, 1616 selectionStart, selectionEnd, candStart, candEnd); 1617 } 1618 } 1619 } 1620 1621 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1622 int cursorOffsetVertical) { 1623 final int selectionStart = mTextView.getSelectionStart(); 1624 final int selectionEnd = mTextView.getSelectionEnd(); 1625 1626 final InputMethodState ims = mInputMethodState; 1627 if (ims != null && ims.mBatchEditNesting == 0) { 1628 InputMethodManager imm = InputMethodManager.peekInstance(); 1629 if (imm != null) { 1630 if (imm.isActive(mTextView)) { 1631 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1632 // We are in extract mode and the content has changed 1633 // in some way... just report complete new text to the 1634 // input method. 1635 reportExtractedText(); 1636 } 1637 } 1638 } 1639 } 1640 1641 if (mCorrectionHighlighter != null) { 1642 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1643 } 1644 1645 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1646 drawCursor(canvas, cursorOffsetVertical); 1647 // Rely on the drawable entirely, do not draw the cursor line. 1648 // Has to be done after the IMM related code above which relies on the highlight. 1649 highlight = null; 1650 } 1651 1652 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1653 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1654 cursorOffsetVertical); 1655 } else { 1656 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1657 } 1658 } 1659 1660 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1661 Paint highlightPaint, int cursorOffsetVertical) { 1662 final long lineRange = layout.getLineRangeForDraw(canvas); 1663 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1664 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1665 if (lastLine < 0) return; 1666 1667 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1668 firstLine, lastLine); 1669 1670 if (layout instanceof DynamicLayout) { 1671 if (mTextRenderNodes == null) { 1672 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1673 } 1674 1675 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1676 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1677 int[] blockIndices = dynamicLayout.getBlockIndices(); 1678 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1679 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1680 1681 int endOfPreviousBlock = -1; 1682 int searchStartIndex = 0; 1683 for (int i = 0; i < numberOfBlocks; i++) { 1684 int blockEndLine = blockEndLines[i]; 1685 int blockIndex = blockIndices[i]; 1686 1687 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1688 if (blockIsInvalid) { 1689 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1690 searchStartIndex); 1691 // Note how dynamic layout's internal block indices get updated from Editor 1692 blockIndices[i] = blockIndex; 1693 if (mTextRenderNodes[blockIndex] != null) { 1694 mTextRenderNodes[blockIndex].isDirty = true; 1695 } 1696 searchStartIndex = blockIndex + 1; 1697 } 1698 1699 if (mTextRenderNodes[blockIndex] == null) { 1700 mTextRenderNodes[blockIndex] = 1701 new TextRenderNode("Text " + blockIndex); 1702 } 1703 1704 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1705 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1706 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1707 final int blockBeginLine = endOfPreviousBlock + 1; 1708 final int top = layout.getLineTop(blockBeginLine); 1709 final int bottom = layout.getLineBottom(blockEndLine); 1710 int left = 0; 1711 int right = mTextView.getWidth(); 1712 if (mTextView.getHorizontallyScrolling()) { 1713 float min = Float.MAX_VALUE; 1714 float max = Float.MIN_VALUE; 1715 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1716 min = Math.min(min, layout.getLineLeft(line)); 1717 max = Math.max(max, layout.getLineRight(line)); 1718 } 1719 left = (int) min; 1720 right = (int) (max + 0.5f); 1721 } 1722 1723 // Rebuild display list if it is invalid 1724 if (blockDisplayListIsInvalid) { 1725 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1726 right - left, bottom - top); 1727 try { 1728 // drawText is always relative to TextView's origin, this translation 1729 // brings this range of text back to the top left corner of the viewport 1730 displayListCanvas.translate(-left, -top); 1731 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1732 mTextRenderNodes[blockIndex].isDirty = false; 1733 // No need to untranslate, previous context is popped after 1734 // drawDisplayList 1735 } finally { 1736 blockDisplayList.end(displayListCanvas); 1737 // Same as drawDisplayList below, handled by our TextView's parent 1738 blockDisplayList.setClipToBounds(false); 1739 } 1740 } 1741 1742 // Valid disply list whose index is >= indexFirstChangedBlock 1743 // only needs to update its drawing location. 1744 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1745 } 1746 1747 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1748 1749 endOfPreviousBlock = blockEndLine; 1750 } 1751 1752 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1753 } else { 1754 // Boring layout is used for empty and hint text 1755 layout.drawText(canvas, firstLine, lastLine); 1756 } 1757 } 1758 1759 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1760 int searchStartIndex) { 1761 int length = mTextRenderNodes.length; 1762 for (int i = searchStartIndex; i < length; i++) { 1763 boolean blockIndexFound = false; 1764 for (int j = 0; j < numberOfBlocks; j++) { 1765 if (blockIndices[j] == i) { 1766 blockIndexFound = true; 1767 break; 1768 } 1769 } 1770 if (blockIndexFound) continue; 1771 return i; 1772 } 1773 1774 // No available index found, the pool has to grow 1775 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1776 return length; 1777 } 1778 1779 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1780 final boolean translate = cursorOffsetVertical != 0; 1781 if (translate) canvas.translate(0, cursorOffsetVertical); 1782 for (int i = 0; i < mCursorCount; i++) { 1783 mCursorDrawable[i].draw(canvas); 1784 } 1785 if (translate) canvas.translate(0, -cursorOffsetVertical); 1786 } 1787 1788 void invalidateHandlesAndActionMode() { 1789 if (mSelectionModifierCursorController != null) { 1790 mSelectionModifierCursorController.invalidateHandles(); 1791 } 1792 if (mInsertionPointCursorController != null) { 1793 mInsertionPointCursorController.invalidateHandle(); 1794 } 1795 if (mTextActionMode != null) { 1796 mTextActionMode.invalidate(); 1797 } 1798 } 1799 1800 /** 1801 * Invalidates all the sub-display lists that overlap the specified character range 1802 */ 1803 void invalidateTextDisplayList(Layout layout, int start, int end) { 1804 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1805 final int firstLine = layout.getLineForOffset(start); 1806 final int lastLine = layout.getLineForOffset(end); 1807 1808 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1809 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1810 int[] blockIndices = dynamicLayout.getBlockIndices(); 1811 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1812 1813 int i = 0; 1814 // Skip the blocks before firstLine 1815 while (i < numberOfBlocks) { 1816 if (blockEndLines[i] >= firstLine) break; 1817 i++; 1818 } 1819 1820 // Invalidate all subsequent blocks until lastLine is passed 1821 while (i < numberOfBlocks) { 1822 final int blockIndex = blockIndices[i]; 1823 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1824 mTextRenderNodes[blockIndex].isDirty = true; 1825 } 1826 if (blockEndLines[i] >= lastLine) break; 1827 i++; 1828 } 1829 } 1830 } 1831 1832 void invalidateTextDisplayList() { 1833 if (mTextRenderNodes != null) { 1834 for (int i = 0; i < mTextRenderNodes.length; i++) { 1835 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1836 } 1837 } 1838 } 1839 1840 void updateCursorsPositions() { 1841 if (mTextView.mCursorDrawableRes == 0) { 1842 mCursorCount = 0; 1843 return; 1844 } 1845 1846 Layout layout = mTextView.getLayout(); 1847 final int offset = mTextView.getSelectionStart(); 1848 final int line = layout.getLineForOffset(offset); 1849 final int top = layout.getLineTop(line); 1850 final int bottom = layout.getLineTop(line + 1); 1851 1852 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1853 1854 int middle = bottom; 1855 if (mCursorCount == 2) { 1856 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1857 middle = (top + bottom) >> 1; 1858 } 1859 1860 boolean clamped = layout.shouldClampCursor(line); 1861 updateCursorPosition(0, top, middle, layout.getPrimaryHorizontal(offset, clamped)); 1862 1863 if (mCursorCount == 2) { 1864 updateCursorPosition(1, middle, bottom, layout.getSecondaryHorizontal(offset, clamped)); 1865 } 1866 } 1867 1868 void refreshTextActionMode() { 1869 if (extractedTextModeWillBeStarted()) { 1870 mRestartActionModeOnNextRefresh = false; 1871 return; 1872 } 1873 final boolean hasSelection = mTextView.hasSelection(); 1874 final SelectionModifierCursorController selectionController = getSelectionController(); 1875 final InsertionPointCursorController insertionController = getInsertionController(); 1876 if ((selectionController != null && selectionController.isCursorBeingModified()) 1877 || (insertionController != null && insertionController.isCursorBeingModified())) { 1878 // ActionMode should be managed by the currently active cursor controller. 1879 mRestartActionModeOnNextRefresh = false; 1880 return; 1881 } 1882 if (hasSelection) { 1883 hideInsertionPointCursorController(); 1884 if (mTextActionMode == null) { 1885 if (mRestartActionModeOnNextRefresh) { 1886 // To avoid distraction, newly start action mode only when selection action 1887 // mode is being restarted. 1888 startSelectionActionMode(); 1889 } 1890 } else if (selectionController == null || !selectionController.isActive()) { 1891 // Insertion action mode is active. Avoid dismissing the selection. 1892 stopTextActionModeWithPreservingSelection(); 1893 startSelectionActionMode(); 1894 } else { 1895 mTextActionMode.invalidateContentRect(); 1896 } 1897 } else { 1898 // Insertion action mode is started only when insertion controller is explicitly 1899 // activated. 1900 if (insertionController == null || !insertionController.isActive()) { 1901 stopTextActionMode(); 1902 } else if (mTextActionMode != null) { 1903 mTextActionMode.invalidateContentRect(); 1904 } 1905 } 1906 mRestartActionModeOnNextRefresh = false; 1907 } 1908 1909 /** 1910 * Start an Insertion action mode. 1911 */ 1912 void startInsertionActionMode() { 1913 if (mInsertionActionModeRunnable != null) { 1914 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1915 } 1916 if (extractedTextModeWillBeStarted()) { 1917 return; 1918 } 1919 stopTextActionMode(); 1920 1921 ActionMode.Callback actionModeCallback = 1922 new TextActionModeCallback(false /* hasSelection */); 1923 mTextActionMode = mTextView.startActionMode( 1924 actionModeCallback, ActionMode.TYPE_FLOATING); 1925 if (mTextActionMode != null && getInsertionController() != null) { 1926 getInsertionController().show(); 1927 } 1928 } 1929 1930 /** 1931 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1932 * are shown if there is a selection. This should be used when the mode is started from a 1933 * non-touch event. 1934 * 1935 * @return true if the selection mode was actually started. 1936 */ 1937 boolean startSelectionActionMode() { 1938 boolean selectionStarted = startSelectionActionModeInternal(); 1939 if (selectionStarted) { 1940 getSelectionController().show(); 1941 } 1942 mRestartActionModeOnNextRefresh = false; 1943 return selectionStarted; 1944 } 1945 1946 /** 1947 * If the TextView allows text selection, selects the current word when no existing selection 1948 * was available and starts a drag. 1949 * 1950 * @return true if the drag was started. 1951 */ 1952 private boolean selectCurrentWordAndStartDrag() { 1953 if (mInsertionActionModeRunnable != null) { 1954 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1955 } 1956 if (extractedTextModeWillBeStarted()) { 1957 return false; 1958 } 1959 if (!checkField()) { 1960 return false; 1961 } 1962 if (!mTextView.hasSelection() && !selectCurrentWord()) { 1963 // No selection and cannot select a word. 1964 return false; 1965 } 1966 stopTextActionModeWithPreservingSelection(); 1967 getSelectionController().enterDrag( 1968 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 1969 return true; 1970 } 1971 1972 /** 1973 * Checks whether a selection can be performed on the current TextView. 1974 * 1975 * @return true if a selection can be performed 1976 */ 1977 boolean checkField() { 1978 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1979 Log.w(TextView.LOG_TAG, 1980 "TextView does not support text selection. Selection cancelled."); 1981 return false; 1982 } 1983 return true; 1984 } 1985 1986 private boolean startSelectionActionModeInternal() { 1987 if (extractedTextModeWillBeStarted()) { 1988 return false; 1989 } 1990 if (mTextActionMode != null) { 1991 // Text action mode is already started 1992 mTextActionMode.invalidate(); 1993 return false; 1994 } 1995 1996 if (!checkField() || !mTextView.hasSelection()) { 1997 return false; 1998 } 1999 2000 ActionMode.Callback actionModeCallback = 2001 new TextActionModeCallback(true /* hasSelection */); 2002 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2003 2004 final boolean selectionStarted = mTextActionMode != null; 2005 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2006 // Show the IME to be able to replace text, except when selecting non editable text. 2007 final InputMethodManager imm = InputMethodManager.peekInstance(); 2008 if (imm != null) { 2009 imm.showSoftInput(mTextView, 0, null); 2010 } 2011 } 2012 return selectionStarted; 2013 } 2014 2015 private boolean extractedTextModeWillBeStarted() { 2016 if (!(mTextView.isInExtractedMode())) { 2017 final InputMethodManager imm = InputMethodManager.peekInstance(); 2018 return imm != null && imm.isFullscreenMode(); 2019 } 2020 return false; 2021 } 2022 2023 /** 2024 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2025 * the current cursor position or selection range. This method is consistent with the 2026 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2027 */ 2028 private boolean shouldOfferToShowSuggestions() { 2029 CharSequence text = mTextView.getText(); 2030 if (!(text instanceof Spannable)) return false; 2031 2032 final Spannable spannable = (Spannable) text; 2033 final int selectionStart = mTextView.getSelectionStart(); 2034 final int selectionEnd = mTextView.getSelectionEnd(); 2035 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2036 SuggestionSpan.class); 2037 if (suggestionSpans.length == 0) { 2038 return false; 2039 } 2040 if (selectionStart == selectionEnd) { 2041 // Spans overlap the cursor. 2042 for (int i = 0; i < suggestionSpans.length; i++) { 2043 if (suggestionSpans[i].getSuggestions().length > 0) { 2044 return true; 2045 } 2046 } 2047 return false; 2048 } 2049 int minSpanStart = mTextView.getText().length(); 2050 int maxSpanEnd = 0; 2051 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2052 int unionOfSpansCoveringSelectionStartEnd = 0; 2053 boolean hasValidSuggestions = false; 2054 for (int i = 0; i < suggestionSpans.length; i++) { 2055 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2056 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2057 minSpanStart = Math.min(minSpanStart, spanStart); 2058 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2059 if (selectionStart < spanStart || selectionStart > spanEnd) { 2060 // The span doesn't cover the current selection start point. 2061 continue; 2062 } 2063 hasValidSuggestions = 2064 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2065 unionOfSpansCoveringSelectionStartStart = 2066 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2067 unionOfSpansCoveringSelectionStartEnd = 2068 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2069 } 2070 if (!hasValidSuggestions) { 2071 return false; 2072 } 2073 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2074 // No spans cover the selection start point. 2075 return false; 2076 } 2077 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2078 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2079 // There is a span that is not covered by the union. In this case, we soouldn't offer 2080 // to show suggestions as it's confusing. 2081 return false; 2082 } 2083 return true; 2084 } 2085 2086 /** 2087 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2088 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2089 */ 2090 private boolean isCursorInsideEasyCorrectionSpan() { 2091 Spannable spannable = (Spannable) mTextView.getText(); 2092 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2093 mTextView.getSelectionEnd(), SuggestionSpan.class); 2094 for (int i = 0; i < suggestionSpans.length; i++) { 2095 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2096 return true; 2097 } 2098 } 2099 return false; 2100 } 2101 2102 void onTouchUpEvent(MotionEvent event) { 2103 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2104 hideCursorAndSpanControllers(); 2105 stopTextActionMode(); 2106 CharSequence text = mTextView.getText(); 2107 if (!selectAllGotFocus && text.length() > 0) { 2108 // Move cursor 2109 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2110 Selection.setSelection((Spannable) text, offset); 2111 if (mSpellChecker != null) { 2112 // When the cursor moves, the word that was typed may need spell check 2113 mSpellChecker.onSelectionChanged(); 2114 } 2115 2116 if (!extractedTextModeWillBeStarted()) { 2117 if (isCursorInsideEasyCorrectionSpan()) { 2118 // Cancel the single tap delayed runnable. 2119 if (mInsertionActionModeRunnable != null) { 2120 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2121 } 2122 2123 mShowSuggestionRunnable = new Runnable() { 2124 public void run() { 2125 replace(); 2126 } 2127 }; 2128 // removeCallbacks is performed on every touch 2129 mTextView.postDelayed(mShowSuggestionRunnable, 2130 ViewConfiguration.getDoubleTapTimeout()); 2131 } else if (hasInsertionController()) { 2132 getInsertionController().show(); 2133 } 2134 } 2135 } 2136 } 2137 2138 protected void stopTextActionMode() { 2139 if (mTextActionMode != null) { 2140 // This will hide the mSelectionModifierCursorController 2141 mTextActionMode.finish(); 2142 } 2143 } 2144 2145 private void stopTextActionModeWithPreservingSelection() { 2146 if (mTextActionMode != null) { 2147 mRestartActionModeOnNextRefresh = true; 2148 } 2149 mPreserveSelection = true; 2150 stopTextActionMode(); 2151 mPreserveSelection = false; 2152 } 2153 2154 /** 2155 * @return True if this view supports insertion handles. 2156 */ 2157 boolean hasInsertionController() { 2158 return mInsertionControllerEnabled; 2159 } 2160 2161 /** 2162 * @return True if this view supports selection handles. 2163 */ 2164 boolean hasSelectionController() { 2165 return mSelectionControllerEnabled; 2166 } 2167 2168 private InsertionPointCursorController getInsertionController() { 2169 if (!mInsertionControllerEnabled) { 2170 return null; 2171 } 2172 2173 if (mInsertionPointCursorController == null) { 2174 mInsertionPointCursorController = new InsertionPointCursorController(); 2175 2176 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2177 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2178 } 2179 2180 return mInsertionPointCursorController; 2181 } 2182 2183 private SelectionModifierCursorController getSelectionController() { 2184 if (!mSelectionControllerEnabled) { 2185 return null; 2186 } 2187 2188 if (mSelectionModifierCursorController == null) { 2189 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2190 2191 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2192 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2193 } 2194 2195 return mSelectionModifierCursorController; 2196 } 2197 2198 @VisibleForTesting 2199 public Drawable[] getCursorDrawable() { 2200 return mCursorDrawable; 2201 } 2202 2203 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2204 if (mCursorDrawable[cursorIndex] == null) 2205 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2206 mTextView.mCursorDrawableRes); 2207 final Drawable drawable = mCursorDrawable[cursorIndex]; 2208 final int left = clampHorizontalPosition(drawable, horizontal); 2209 final int width = drawable.getIntrinsicWidth(); 2210 drawable.setBounds(left, top - mTempRect.top, left + width, 2211 bottom + mTempRect.bottom); 2212 } 2213 2214 /** 2215 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2216 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2217 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2218 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2219 * of the view. 2220 * 2221 * @param drawable Drawable. Can be null. 2222 * @param horizontal Horizontal position for the drawable. 2223 * @return The clamped horizontal position for the drawable. 2224 */ 2225 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2226 horizontal = Math.max(0.5f, horizontal - 0.5f); 2227 if (mTempRect == null) mTempRect = new Rect(); 2228 2229 int drawableWidth = 0; 2230 if (drawable != null) { 2231 drawable.getPadding(mTempRect); 2232 drawableWidth = drawable.getIntrinsicWidth(); 2233 } else { 2234 mTempRect.setEmpty(); 2235 } 2236 2237 int scrollX = mTextView.getScrollX(); 2238 float horizontalDiff = horizontal - scrollX; 2239 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2240 - mTextView.getCompoundPaddingRight(); 2241 2242 final int left; 2243 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2244 // at the rightmost position 2245 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2246 } else if (Math.abs(horizontalDiff) <= 1f || 2247 (TextUtils.isEmpty(mTextView.getText()) 2248 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2249 && horizontal <= 1f)) { 2250 // at the leftmost position 2251 left = scrollX - mTempRect.left; 2252 } else { 2253 left = (int) horizontal - mTempRect.left; 2254 } 2255 return left; 2256 } 2257 2258 /** 2259 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2260 * a dictionary) from the current input method, provided by it calling 2261 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2262 * implementation flashes the background of the corrected word to provide feedback to the user. 2263 * 2264 * @param info The auto correct info about the text that was corrected. 2265 */ 2266 public void onCommitCorrection(CorrectionInfo info) { 2267 if (mCorrectionHighlighter == null) { 2268 mCorrectionHighlighter = new CorrectionHighlighter(); 2269 } else { 2270 mCorrectionHighlighter.invalidate(false); 2271 } 2272 2273 mCorrectionHighlighter.highlight(info); 2274 mUndoInputFilter.freezeLastEdit(); 2275 } 2276 2277 void onScrollChanged() { 2278 if (mPositionListener != null) { 2279 mPositionListener.onScrollChanged(); 2280 } 2281 if (mTextActionMode != null) { 2282 mTextActionMode.invalidateContentRect(); 2283 } 2284 } 2285 2286 /** 2287 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2288 */ 2289 private boolean shouldBlink() { 2290 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2291 2292 final int start = mTextView.getSelectionStart(); 2293 if (start < 0) return false; 2294 2295 final int end = mTextView.getSelectionEnd(); 2296 if (end < 0) return false; 2297 2298 return start == end; 2299 } 2300 2301 void makeBlink() { 2302 if (shouldBlink()) { 2303 mShowCursor = SystemClock.uptimeMillis(); 2304 if (mBlink == null) mBlink = new Blink(); 2305 mTextView.removeCallbacks(mBlink); 2306 mTextView.postDelayed(mBlink, BLINK); 2307 } else { 2308 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2309 } 2310 } 2311 2312 private class Blink implements Runnable { 2313 private boolean mCancelled; 2314 2315 public void run() { 2316 if (mCancelled) { 2317 return; 2318 } 2319 2320 mTextView.removeCallbacks(this); 2321 2322 if (shouldBlink()) { 2323 if (mTextView.getLayout() != null) { 2324 mTextView.invalidateCursorPath(); 2325 } 2326 2327 mTextView.postDelayed(this, BLINK); 2328 } 2329 } 2330 2331 void cancel() { 2332 if (!mCancelled) { 2333 mTextView.removeCallbacks(this); 2334 mCancelled = true; 2335 } 2336 } 2337 2338 void uncancel() { 2339 mCancelled = false; 2340 } 2341 } 2342 2343 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2344 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2345 com.android.internal.R.layout.text_drag_thumbnail, null); 2346 2347 if (shadowView == null) { 2348 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2349 } 2350 2351 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2352 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2353 end = TextUtils.unpackRangeEndFromLong(range); 2354 } 2355 final CharSequence text = mTextView.getTransformedText(start, end); 2356 shadowView.setText(text); 2357 shadowView.setTextColor(mTextView.getTextColors()); 2358 2359 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2360 shadowView.setGravity(Gravity.CENTER); 2361 2362 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2363 ViewGroup.LayoutParams.WRAP_CONTENT)); 2364 2365 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2366 shadowView.measure(size, size); 2367 2368 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2369 shadowView.invalidate(); 2370 return new DragShadowBuilder(shadowView); 2371 } 2372 2373 private static class DragLocalState { 2374 public TextView sourceTextView; 2375 public int start, end; 2376 2377 public DragLocalState(TextView sourceTextView, int start, int end) { 2378 this.sourceTextView = sourceTextView; 2379 this.start = start; 2380 this.end = end; 2381 } 2382 } 2383 2384 void onDrop(DragEvent event) { 2385 StringBuilder content = new StringBuilder(""); 2386 2387 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2388 if (permissions != null) { 2389 permissions.takeTransient(); 2390 } 2391 2392 try { 2393 ClipData clipData = event.getClipData(); 2394 final int itemCount = clipData.getItemCount(); 2395 for (int i=0; i < itemCount; i++) { 2396 Item item = clipData.getItemAt(i); 2397 content.append(item.coerceToStyledText(mTextView.getContext())); 2398 } 2399 } 2400 finally { 2401 if (permissions != null) { 2402 permissions.release(); 2403 } 2404 } 2405 2406 mTextView.beginBatchEdit(); 2407 mUndoInputFilter.freezeLastEdit(); 2408 try { 2409 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2410 Object localState = event.getLocalState(); 2411 DragLocalState dragLocalState = null; 2412 if (localState instanceof DragLocalState) { 2413 dragLocalState = (DragLocalState) localState; 2414 } 2415 boolean dragDropIntoItself = dragLocalState != null && 2416 dragLocalState.sourceTextView == mTextView; 2417 2418 if (dragDropIntoItself) { 2419 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2420 // A drop inside the original selection discards the drop. 2421 return; 2422 } 2423 } 2424 2425 final int originalLength = mTextView.getText().length(); 2426 int min = offset; 2427 int max = offset; 2428 2429 Selection.setSelection((Spannable) mTextView.getText(), max); 2430 mTextView.replaceText_internal(min, max, content); 2431 2432 if (dragDropIntoItself) { 2433 int dragSourceStart = dragLocalState.start; 2434 int dragSourceEnd = dragLocalState.end; 2435 if (max <= dragSourceStart) { 2436 // Inserting text before selection has shifted positions 2437 final int shift = mTextView.getText().length() - originalLength; 2438 dragSourceStart += shift; 2439 dragSourceEnd += shift; 2440 } 2441 2442 // Delete original selection 2443 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2444 2445 // Make sure we do not leave two adjacent spaces. 2446 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2447 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2448 if (nextCharIdx > prevCharIdx + 1) { 2449 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2450 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2451 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2452 } 2453 } 2454 } 2455 } finally { 2456 mTextView.endBatchEdit(); 2457 mUndoInputFilter.freezeLastEdit(); 2458 } 2459 } 2460 2461 public void addSpanWatchers(Spannable text) { 2462 final int textLength = text.length(); 2463 2464 if (mKeyListener != null) { 2465 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2466 } 2467 2468 if (mSpanController == null) { 2469 mSpanController = new SpanController(); 2470 } 2471 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2472 } 2473 2474 void setContextMenuAnchor(float x, float y) { 2475 mContextMenuAnchorX = x; 2476 mContextMenuAnchorY = y; 2477 } 2478 2479 void onCreateContextMenu(ContextMenu menu) { 2480 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2481 || Float.isNaN(mContextMenuAnchorY)) { 2482 return; 2483 } 2484 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2485 if (offset == -1) { 2486 return; 2487 } 2488 stopTextActionModeWithPreservingSelection(); 2489 final boolean isOnSelection = mTextView.hasSelection() 2490 && offset >= mTextView.getSelectionStart() && offset <= mTextView.getSelectionEnd(); 2491 if (!isOnSelection) { 2492 // Right clicked position is not on the selection. Remove the selection and move the 2493 // cursor to the right clicked position. 2494 Selection.setSelection((Spannable) mTextView.getText(), offset); 2495 stopTextActionMode(); 2496 } 2497 2498 if (shouldOfferToShowSuggestions()) { 2499 final SuggestionInfo[] suggestionInfoArray = 2500 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2501 for (int i = 0; i < suggestionInfoArray.length; i++) { 2502 suggestionInfoArray[i] = new SuggestionInfo(); 2503 } 2504 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2505 com.android.internal.R.string.replace); 2506 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2507 for (int i = 0; i < numItems; i++) { 2508 final SuggestionInfo info = suggestionInfoArray[i]; 2509 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2510 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2511 @Override 2512 public boolean onMenuItemClick(MenuItem item) { 2513 replaceWithSuggestion(info); 2514 return true; 2515 } 2516 }); 2517 } 2518 } 2519 2520 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2521 com.android.internal.R.string.undo) 2522 .setAlphabeticShortcut('z') 2523 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2524 .setEnabled(mTextView.canUndo()); 2525 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2526 com.android.internal.R.string.redo) 2527 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2528 .setEnabled(mTextView.canRedo()); 2529 2530 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2531 com.android.internal.R.string.cut) 2532 .setAlphabeticShortcut('x') 2533 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2534 .setEnabled(mTextView.canCut()); 2535 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2536 com.android.internal.R.string.copy) 2537 .setAlphabeticShortcut('c') 2538 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2539 .setEnabled(mTextView.canCopy()); 2540 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2541 com.android.internal.R.string.paste) 2542 .setAlphabeticShortcut('v') 2543 .setEnabled(mTextView.canPaste()) 2544 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2545 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2546 com.android.internal.R.string.paste_as_plain_text) 2547 .setEnabled(mTextView.canPaste()) 2548 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2549 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2550 com.android.internal.R.string.share) 2551 .setEnabled(mTextView.canShare()) 2552 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2553 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2554 com.android.internal.R.string.selectAll) 2555 .setAlphabeticShortcut('a') 2556 .setEnabled(mTextView.canSelectAllText()) 2557 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2558 2559 mPreserveSelection = true; 2560 } 2561 2562 @Nullable 2563 private SuggestionSpan findEquivalentSuggestionSpan( 2564 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2565 final Editable editable = (Editable) mTextView.getText(); 2566 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2567 // Exactly same span is found. 2568 return suggestionSpanInfo.mSuggestionSpan; 2569 } 2570 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2571 // contents. 2572 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2573 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2574 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2575 final int start = editable.getSpanStart(suggestionSpan); 2576 if (start != suggestionSpanInfo.mSpanStart) { 2577 continue; 2578 } 2579 final int end = editable.getSpanEnd(suggestionSpan); 2580 if (end != suggestionSpanInfo.mSpanEnd) { 2581 continue; 2582 } 2583 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2584 return suggestionSpan; 2585 } 2586 } 2587 return null; 2588 } 2589 2590 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2591 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2592 suggestionInfo.mSuggestionSpanInfo); 2593 if (targetSuggestionSpan == null) { 2594 // Span has been removed 2595 return; 2596 } 2597 final Editable editable = (Editable) mTextView.getText(); 2598 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2599 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2600 if (spanStart < 0 || spanEnd <= spanStart) { 2601 // Span has been removed 2602 return; 2603 } 2604 2605 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2606 // SuggestionSpans are removed by replace: save them before 2607 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2608 SuggestionSpan.class); 2609 final int length = suggestionSpans.length; 2610 int[] suggestionSpansStarts = new int[length]; 2611 int[] suggestionSpansEnds = new int[length]; 2612 int[] suggestionSpansFlags = new int[length]; 2613 for (int i = 0; i < length; i++) { 2614 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2615 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2616 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2617 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2618 2619 // Remove potential misspelled flags 2620 int suggestionSpanFlags = suggestionSpan.getFlags(); 2621 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2622 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2623 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2624 suggestionSpan.setFlags(suggestionSpanFlags); 2625 } 2626 } 2627 2628 // Notify source IME of the suggestion pick. Do this before swapping texts. 2629 targetSuggestionSpan.notifySelection( 2630 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2631 2632 // Swap text content between actual text and Suggestion span 2633 final int suggestionStart = suggestionInfo.mSuggestionStart; 2634 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2635 final String suggestion = suggestionInfo.mText.subSequence( 2636 suggestionStart, suggestionEnd).toString(); 2637 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2638 2639 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2640 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2641 2642 // Restore previous SuggestionSpans 2643 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2644 for (int i = 0; i < length; i++) { 2645 // Only spans that include the modified region make sense after replacement 2646 // Spans partially included in the replaced region are removed, there is no 2647 // way to assign them a valid range after replacement 2648 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2649 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2650 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2651 } 2652 } 2653 // Move cursor at the end of the replaced word 2654 final int newCursorPosition = spanEnd + lengthDelta; 2655 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2656 } 2657 2658 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2659 new MenuItem.OnMenuItemClickListener() { 2660 @Override 2661 public boolean onMenuItemClick(MenuItem item) { 2662 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2663 return true; 2664 } 2665 return mTextView.onTextContextMenuItem(item.getItemId()); 2666 } 2667 }; 2668 2669 /** 2670 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2671 * pop-up should be displayed. 2672 * Also monitors {@link Selection} to call back to the attached input method. 2673 */ 2674 private class SpanController implements SpanWatcher { 2675 2676 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2677 2678 private EasyEditPopupWindow mPopupWindow; 2679 2680 private Runnable mHidePopup; 2681 2682 // This function is pure but inner classes can't have static functions 2683 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2684 final Object span) { 2685 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2686 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2687 } 2688 2689 @Override 2690 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2691 if (isNonIntermediateSelectionSpan(text, span)) { 2692 sendUpdateSelection(); 2693 } else if (span instanceof EasyEditSpan) { 2694 if (mPopupWindow == null) { 2695 mPopupWindow = new EasyEditPopupWindow(); 2696 mHidePopup = new Runnable() { 2697 @Override 2698 public void run() { 2699 hide(); 2700 } 2701 }; 2702 } 2703 2704 // Make sure there is only at most one EasyEditSpan in the text 2705 if (mPopupWindow.mEasyEditSpan != null) { 2706 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2707 } 2708 2709 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2710 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2711 @Override 2712 public void onDeleteClick(EasyEditSpan span) { 2713 Editable editable = (Editable) mTextView.getText(); 2714 int start = editable.getSpanStart(span); 2715 int end = editable.getSpanEnd(span); 2716 if (start >= 0 && end >= 0) { 2717 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2718 mTextView.deleteText_internal(start, end); 2719 } 2720 editable.removeSpan(span); 2721 } 2722 }); 2723 2724 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2725 // The window is not visible yet, ignore the text change. 2726 return; 2727 } 2728 2729 if (mTextView.getLayout() == null) { 2730 // The view has not been laid out yet, ignore the text change 2731 return; 2732 } 2733 2734 if (extractedTextModeWillBeStarted()) { 2735 // The input is in extract mode. Do not handle the easy edit in 2736 // the original TextView, as the ExtractEditText will do 2737 return; 2738 } 2739 2740 mPopupWindow.show(); 2741 mTextView.removeCallbacks(mHidePopup); 2742 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2743 } 2744 } 2745 2746 @Override 2747 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2748 if (isNonIntermediateSelectionSpan(text, span)) { 2749 sendUpdateSelection(); 2750 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2751 hide(); 2752 } 2753 } 2754 2755 @Override 2756 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2757 int newStart, int newEnd) { 2758 if (isNonIntermediateSelectionSpan(text, span)) { 2759 sendUpdateSelection(); 2760 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2761 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2762 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2763 text.removeSpan(easyEditSpan); 2764 } 2765 } 2766 2767 public void hide() { 2768 if (mPopupWindow != null) { 2769 mPopupWindow.hide(); 2770 mTextView.removeCallbacks(mHidePopup); 2771 } 2772 } 2773 2774 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2775 try { 2776 PendingIntent pendingIntent = span.getPendingIntent(); 2777 if (pendingIntent != null) { 2778 Intent intent = new Intent(); 2779 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2780 pendingIntent.send(mTextView.getContext(), 0, intent); 2781 } 2782 } catch (CanceledException e) { 2783 // This should not happen, as we should try to send the intent only once. 2784 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2785 } 2786 } 2787 } 2788 2789 /** 2790 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2791 */ 2792 private interface EasyEditDeleteListener { 2793 2794 /** 2795 * Clicks the delete pop-up. 2796 */ 2797 void onDeleteClick(EasyEditSpan span); 2798 } 2799 2800 /** 2801 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2802 * by {@link SpanController}. 2803 */ 2804 private class EasyEditPopupWindow extends PinnedPopupWindow 2805 implements OnClickListener { 2806 private static final int POPUP_TEXT_LAYOUT = 2807 com.android.internal.R.layout.text_edit_action_popup_text; 2808 private TextView mDeleteTextView; 2809 private EasyEditSpan mEasyEditSpan; 2810 private EasyEditDeleteListener mOnDeleteListener; 2811 2812 @Override 2813 protected void createPopupWindow() { 2814 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2815 com.android.internal.R.attr.textSelectHandleWindowStyle); 2816 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2817 mPopupWindow.setClippingEnabled(true); 2818 } 2819 2820 @Override 2821 protected void initContentView() { 2822 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2823 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2824 mContentView = linearLayout; 2825 mContentView.setBackgroundResource( 2826 com.android.internal.R.drawable.text_edit_side_paste_window); 2827 2828 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2829 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2830 2831 LayoutParams wrapContent = new LayoutParams( 2832 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2833 2834 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2835 mDeleteTextView.setLayoutParams(wrapContent); 2836 mDeleteTextView.setText(com.android.internal.R.string.delete); 2837 mDeleteTextView.setOnClickListener(this); 2838 mContentView.addView(mDeleteTextView); 2839 } 2840 2841 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2842 mEasyEditSpan = easyEditSpan; 2843 } 2844 2845 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2846 mOnDeleteListener = listener; 2847 } 2848 2849 @Override 2850 public void onClick(View view) { 2851 if (view == mDeleteTextView 2852 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2853 && mOnDeleteListener != null) { 2854 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2855 } 2856 } 2857 2858 @Override 2859 public void hide() { 2860 if (mEasyEditSpan != null) { 2861 mEasyEditSpan.setDeleteEnabled(false); 2862 } 2863 mOnDeleteListener = null; 2864 super.hide(); 2865 } 2866 2867 @Override 2868 protected int getTextOffset() { 2869 // Place the pop-up at the end of the span 2870 Editable editable = (Editable) mTextView.getText(); 2871 return editable.getSpanEnd(mEasyEditSpan); 2872 } 2873 2874 @Override 2875 protected int getVerticalLocalPosition(int line) { 2876 return mTextView.getLayout().getLineBottom(line); 2877 } 2878 2879 @Override 2880 protected int clipVertically(int positionY) { 2881 // As we display the pop-up below the span, no vertical clipping is required. 2882 return positionY; 2883 } 2884 } 2885 2886 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2887 // 3 handles 2888 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2889 // 1 CursorAnchorInfoNotifier 2890 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2891 private TextViewPositionListener[] mPositionListeners = 2892 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2893 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2894 private boolean mPositionHasChanged = true; 2895 // Absolute position of the TextView with respect to its parent window 2896 private int mPositionX, mPositionY; 2897 private int mPositionXOnScreen, mPositionYOnScreen; 2898 private int mNumberOfListeners; 2899 private boolean mScrollHasChanged; 2900 final int[] mTempCoords = new int[2]; 2901 2902 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2903 if (mNumberOfListeners == 0) { 2904 updatePosition(); 2905 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2906 vto.addOnPreDrawListener(this); 2907 } 2908 2909 int emptySlotIndex = -1; 2910 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2911 TextViewPositionListener listener = mPositionListeners[i]; 2912 if (listener == positionListener) { 2913 return; 2914 } else if (emptySlotIndex < 0 && listener == null) { 2915 emptySlotIndex = i; 2916 } 2917 } 2918 2919 mPositionListeners[emptySlotIndex] = positionListener; 2920 mCanMove[emptySlotIndex] = canMove; 2921 mNumberOfListeners++; 2922 } 2923 2924 public void removeSubscriber(TextViewPositionListener positionListener) { 2925 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2926 if (mPositionListeners[i] == positionListener) { 2927 mPositionListeners[i] = null; 2928 mNumberOfListeners--; 2929 break; 2930 } 2931 } 2932 2933 if (mNumberOfListeners == 0) { 2934 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2935 vto.removeOnPreDrawListener(this); 2936 } 2937 } 2938 2939 public int getPositionX() { 2940 return mPositionX; 2941 } 2942 2943 public int getPositionY() { 2944 return mPositionY; 2945 } 2946 2947 public int getPositionXOnScreen() { 2948 return mPositionXOnScreen; 2949 } 2950 2951 public int getPositionYOnScreen() { 2952 return mPositionYOnScreen; 2953 } 2954 2955 @Override 2956 public boolean onPreDraw() { 2957 updatePosition(); 2958 2959 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2960 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2961 TextViewPositionListener positionListener = mPositionListeners[i]; 2962 if (positionListener != null) { 2963 positionListener.updatePosition(mPositionX, mPositionY, 2964 mPositionHasChanged, mScrollHasChanged); 2965 } 2966 } 2967 } 2968 2969 mScrollHasChanged = false; 2970 return true; 2971 } 2972 2973 private void updatePosition() { 2974 mTextView.getLocationInWindow(mTempCoords); 2975 2976 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2977 2978 mPositionX = mTempCoords[0]; 2979 mPositionY = mTempCoords[1]; 2980 2981 mTextView.getLocationOnScreen(mTempCoords); 2982 2983 mPositionXOnScreen = mTempCoords[0]; 2984 mPositionYOnScreen = mTempCoords[1]; 2985 } 2986 2987 public void onScrollChanged() { 2988 mScrollHasChanged = true; 2989 } 2990 } 2991 2992 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2993 protected PopupWindow mPopupWindow; 2994 protected ViewGroup mContentView; 2995 int mPositionX, mPositionY; 2996 int mClippingLimitLeft, mClippingLimitRight; 2997 2998 protected abstract void createPopupWindow(); 2999 protected abstract void initContentView(); 3000 protected abstract int getTextOffset(); 3001 protected abstract int getVerticalLocalPosition(int line); 3002 protected abstract int clipVertically(int positionY); 3003 protected void setUp() { 3004 } 3005 3006 public PinnedPopupWindow() { 3007 // Due to calling subclass methods in base constructor, subclass constructor is not 3008 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3009 // a chance to initialize subclasses, call setUp() method here. 3010 // TODO: It is good to extract non trivial initialization code from constructor. 3011 setUp(); 3012 3013 createPopupWindow(); 3014 3015 mPopupWindow.setWindowLayoutType( 3016 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3017 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3018 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3019 3020 initContentView(); 3021 3022 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3023 ViewGroup.LayoutParams.WRAP_CONTENT); 3024 mContentView.setLayoutParams(wrapContent); 3025 3026 mPopupWindow.setContentView(mContentView); 3027 } 3028 3029 public void show() { 3030 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3031 3032 computeLocalPosition(); 3033 3034 final PositionListener positionListener = getPositionListener(); 3035 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3036 } 3037 3038 protected void measureContent() { 3039 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3040 mContentView.measure( 3041 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3042 View.MeasureSpec.AT_MOST), 3043 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3044 View.MeasureSpec.AT_MOST)); 3045 } 3046 3047 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3048 * positioned according to viewportToContentHorizontalOffset. 3049 * 3050 * This method assumes that mContentView has properly been measured from its content. */ 3051 private void computeLocalPosition() { 3052 measureContent(); 3053 final int width = mContentView.getMeasuredWidth(); 3054 final int offset = getTextOffset(); 3055 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3056 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3057 3058 final int line = mTextView.getLayout().getLineForOffset(offset); 3059 mPositionY = getVerticalLocalPosition(line); 3060 mPositionY += mTextView.viewportToContentVerticalOffset(); 3061 } 3062 3063 private void updatePosition(int parentPositionX, int parentPositionY) { 3064 int positionX = parentPositionX + mPositionX; 3065 int positionY = parentPositionY + mPositionY; 3066 3067 positionY = clipVertically(positionY); 3068 3069 // Horizontal clipping 3070 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3071 final int width = mContentView.getMeasuredWidth(); 3072 positionX = Math.min( 3073 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3074 positionX = Math.max(-mClippingLimitLeft, positionX); 3075 3076 if (isShowing()) { 3077 mPopupWindow.update(positionX, positionY, -1, -1); 3078 } else { 3079 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3080 positionX, positionY); 3081 } 3082 } 3083 3084 public void hide() { 3085 if (!isShowing()) { 3086 return; 3087 } 3088 mPopupWindow.dismiss(); 3089 getPositionListener().removeSubscriber(this); 3090 } 3091 3092 @Override 3093 public void updatePosition(int parentPositionX, int parentPositionY, 3094 boolean parentPositionChanged, boolean parentScrolled) { 3095 // Either parentPositionChanged or parentScrolled is true, check if still visible 3096 if (isShowing() && isOffsetVisible(getTextOffset())) { 3097 if (parentScrolled) computeLocalPosition(); 3098 updatePosition(parentPositionX, parentPositionY); 3099 } else { 3100 hide(); 3101 } 3102 } 3103 3104 public boolean isShowing() { 3105 return mPopupWindow.isShowing(); 3106 } 3107 } 3108 3109 private static final class SuggestionInfo { 3110 // Range of actual suggestion within mText 3111 int mSuggestionStart, mSuggestionEnd; 3112 3113 // The SuggestionSpan that this TextView represents 3114 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3115 3116 // The index of this suggestion inside suggestionSpan 3117 int mSuggestionIndex; 3118 3119 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3120 3121 void clear() { 3122 mSuggestionSpanInfo.clear(); 3123 mText.clear(); 3124 } 3125 3126 // Utility method to set attributes about a SuggestionSpan. 3127 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3128 mSuggestionSpanInfo.mSuggestionSpan = span; 3129 mSuggestionSpanInfo.mSpanStart = spanStart; 3130 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3131 } 3132 } 3133 3134 private static final class SuggestionSpanInfo { 3135 // The SuggestionSpan; 3136 @Nullable 3137 SuggestionSpan mSuggestionSpan; 3138 3139 // The SuggestionSpan start position 3140 int mSpanStart; 3141 3142 // The SuggestionSpan end position 3143 int mSpanEnd; 3144 3145 void clear() { 3146 mSuggestionSpan = null; 3147 } 3148 } 3149 3150 private class SuggestionHelper { 3151 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3152 new SuggestionSpanComparator(); 3153 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3154 new HashMap<SuggestionSpan, Integer>(); 3155 3156 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3157 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3158 final int flag1 = span1.getFlags(); 3159 final int flag2 = span2.getFlags(); 3160 if (flag1 != flag2) { 3161 // The order here should match what is used in updateDrawState 3162 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3163 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3164 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3165 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3166 if (easy1 && !misspelled1) return -1; 3167 if (easy2 && !misspelled2) return 1; 3168 if (misspelled1) return -1; 3169 if (misspelled2) return 1; 3170 } 3171 3172 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3173 } 3174 } 3175 3176 /** 3177 * Returns the suggestion spans that cover the current cursor position. The suggestion 3178 * spans are sorted according to the length of text that they are attached to. 3179 */ 3180 private SuggestionSpan[] getSortedSuggestionSpans() { 3181 int pos = mTextView.getSelectionStart(); 3182 Spannable spannable = (Spannable) mTextView.getText(); 3183 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3184 3185 mSpansLengths.clear(); 3186 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3187 int start = spannable.getSpanStart(suggestionSpan); 3188 int end = spannable.getSpanEnd(suggestionSpan); 3189 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3190 } 3191 3192 // The suggestions are sorted according to their types (easy correction first, then 3193 // misspelled) and to the length of the text that they cover (shorter first). 3194 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3195 mSpansLengths.clear(); 3196 3197 return suggestionSpans; 3198 } 3199 3200 /** 3201 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3202 * position. 3203 * 3204 * @param suggestionInfos SuggestionInfo array the results will be set. 3205 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3206 * @return the number of suggestions actually fetched. 3207 */ 3208 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3209 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3210 final Spannable spannable = (Spannable) mTextView.getText(); 3211 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3212 final int nbSpans = suggestionSpans.length; 3213 if (nbSpans == 0) return 0; 3214 3215 int numberOfSuggestions = 0; 3216 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3217 final int spanStart = spannable.getSpanStart(suggestionSpan); 3218 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3219 3220 if (misspelledSpanInfo != null 3221 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3222 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3223 misspelledSpanInfo.mSpanStart = spanStart; 3224 misspelledSpanInfo.mSpanEnd = spanEnd; 3225 } 3226 3227 final String[] suggestions = suggestionSpan.getSuggestions(); 3228 final int nbSuggestions = suggestions.length; 3229 suggestionLoop: 3230 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3231 final String suggestion = suggestions[suggestionIndex]; 3232 for (int i = 0; i < numberOfSuggestions; i++) { 3233 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3234 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3235 final int otherSpanStart = 3236 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3237 final int otherSpanEnd = 3238 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3239 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3240 continue suggestionLoop; 3241 } 3242 } 3243 } 3244 3245 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3246 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3247 suggestionInfo.mSuggestionIndex = suggestionIndex; 3248 suggestionInfo.mSuggestionStart = 0; 3249 suggestionInfo.mSuggestionEnd = suggestion.length(); 3250 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3251 numberOfSuggestions++; 3252 if (numberOfSuggestions >= suggestionInfos.length) { 3253 return numberOfSuggestions; 3254 } 3255 } 3256 } 3257 return numberOfSuggestions; 3258 } 3259 } 3260 3261 @VisibleForTesting 3262 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3263 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3264 3265 // Key of intent extras for inserting new word into user dictionary. 3266 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3267 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3268 3269 private SuggestionInfo[] mSuggestionInfos; 3270 private int mNumberOfSuggestions; 3271 private boolean mCursorWasVisibleBeforeSuggestions; 3272 private boolean mIsShowingUp = false; 3273 private SuggestionAdapter mSuggestionsAdapter; 3274 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3275 private TextView mAddToDictionaryButton; 3276 private TextView mDeleteButton; 3277 private ListView mSuggestionListView; 3278 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3279 private int mContainerMarginWidth; 3280 private int mContainerMarginTop; 3281 private LinearLayout mContainerView; 3282 private Context mContext; // TODO: Make mContext final. 3283 3284 private class CustomPopupWindow extends PopupWindow { 3285 3286 @Override 3287 public void dismiss() { 3288 if (!isShowing()) { 3289 return; 3290 } 3291 super.dismiss(); 3292 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3293 3294 // Safe cast since show() checks that mTextView.getText() is an Editable 3295 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3296 3297 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3298 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3299 getInsertionController().show(); 3300 } 3301 } 3302 } 3303 3304 public SuggestionsPopupWindow() { 3305 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3306 } 3307 3308 @Override 3309 protected void setUp() { 3310 mContext = applyDefaultTheme(mTextView.getContext()); 3311 mHighlightSpan = new TextAppearanceSpan(mContext, 3312 mTextView.mTextEditSuggestionHighlightStyle); 3313 } 3314 3315 private Context applyDefaultTheme(Context originalContext) { 3316 TypedArray a = originalContext.obtainStyledAttributes( 3317 new int[]{com.android.internal.R.attr.isLightTheme}); 3318 boolean isLightTheme = a.getBoolean(0, true); 3319 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3320 : R.style.ThemeOverlay_Material_Dark; 3321 a.recycle(); 3322 return new ContextThemeWrapper(originalContext, themeId); 3323 } 3324 3325 @Override 3326 protected void createPopupWindow() { 3327 mPopupWindow = new CustomPopupWindow(); 3328 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3329 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3330 mPopupWindow.setFocusable(true); 3331 mPopupWindow.setClippingEnabled(false); 3332 } 3333 3334 @Override 3335 protected void initContentView() { 3336 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3337 Context.LAYOUT_INFLATER_SERVICE); 3338 mContentView = (ViewGroup) inflater.inflate( 3339 mTextView.mTextEditSuggestionContainerLayout, null); 3340 3341 mContainerView = (LinearLayout) mContentView.findViewById( 3342 com.android.internal.R.id.suggestionWindowContainer); 3343 ViewGroup.MarginLayoutParams lp = 3344 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3345 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3346 mContainerMarginTop = lp.topMargin; 3347 mClippingLimitLeft = lp.leftMargin; 3348 mClippingLimitRight = lp.rightMargin; 3349 3350 mSuggestionListView = (ListView) mContentView.findViewById( 3351 com.android.internal.R.id.suggestionContainer); 3352 3353 mSuggestionsAdapter = new SuggestionAdapter(); 3354 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3355 mSuggestionListView.setOnItemClickListener(this); 3356 3357 // Inflate the suggestion items once and for all. 3358 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3359 for (int i = 0; i < mSuggestionInfos.length; i++) { 3360 mSuggestionInfos[i] = new SuggestionInfo(); 3361 } 3362 3363 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3364 com.android.internal.R.id.addToDictionaryButton); 3365 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3366 public void onClick(View v) { 3367 final SuggestionSpan misspelledSpan = 3368 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3369 if (misspelledSpan == null) { 3370 // Span has been removed. 3371 return; 3372 } 3373 final Editable editable = (Editable) mTextView.getText(); 3374 final int spanStart = editable.getSpanStart(misspelledSpan); 3375 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3376 if (spanStart < 0 || spanEnd <= spanStart) { 3377 return; 3378 } 3379 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3380 3381 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3382 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3383 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3384 mTextView.getTextServicesLocale().toString()); 3385 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3386 mTextView.getContext().startActivity(intent); 3387 // There is no way to know if the word was indeed added. Re-check. 3388 // TODO The ExtractEditText should remove the span in the original text instead 3389 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3390 Selection.setSelection(editable, spanEnd); 3391 updateSpellCheckSpans(spanStart, spanEnd, false); 3392 hideWithCleanUp(); 3393 } 3394 }); 3395 3396 mDeleteButton = (TextView) mContentView.findViewById( 3397 com.android.internal.R.id.deleteButton); 3398 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3399 public void onClick(View v) { 3400 final Editable editable = (Editable) mTextView.getText(); 3401 3402 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3403 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3404 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3405 // Do not leave two adjacent spaces after deletion, or one at beginning of 3406 // text 3407 if (spanUnionEnd < editable.length() && 3408 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 3409 (spanUnionStart == 0 || 3410 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 3411 spanUnionEnd = spanUnionEnd + 1; 3412 } 3413 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3414 } 3415 hideWithCleanUp(); 3416 } 3417 }); 3418 3419 } 3420 3421 public boolean isShowingUp() { 3422 return mIsShowingUp; 3423 } 3424 3425 public void onParentLostFocus() { 3426 mIsShowingUp = false; 3427 } 3428 3429 private class SuggestionAdapter extends BaseAdapter { 3430 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3431 Context.LAYOUT_INFLATER_SERVICE); 3432 3433 @Override 3434 public int getCount() { 3435 return mNumberOfSuggestions; 3436 } 3437 3438 @Override 3439 public Object getItem(int position) { 3440 return mSuggestionInfos[position]; 3441 } 3442 3443 @Override 3444 public long getItemId(int position) { 3445 return position; 3446 } 3447 3448 @Override 3449 public View getView(int position, View convertView, ViewGroup parent) { 3450 TextView textView = (TextView) convertView; 3451 3452 if (textView == null) { 3453 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3454 parent, false); 3455 } 3456 3457 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3458 textView.setText(suggestionInfo.mText); 3459 return textView; 3460 } 3461 } 3462 3463 @VisibleForTesting 3464 public ViewGroup getContentViewForTesting() { 3465 return mContentView; 3466 } 3467 3468 @Override 3469 public void show() { 3470 if (!(mTextView.getText() instanceof Editable)) return; 3471 if (extractedTextModeWillBeStarted()) { 3472 return; 3473 } 3474 3475 if (updateSuggestions()) { 3476 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3477 mTextView.setCursorVisible(false); 3478 mIsShowingUp = true; 3479 super.show(); 3480 } 3481 } 3482 3483 @Override 3484 protected void measureContent() { 3485 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3486 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3487 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3488 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3489 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3490 3491 int width = 0; 3492 View view = null; 3493 for (int i = 0; i < mNumberOfSuggestions; i++) { 3494 view = mSuggestionsAdapter.getView(i, view, mContentView); 3495 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3496 view.measure(horizontalMeasure, verticalMeasure); 3497 width = Math.max(width, view.getMeasuredWidth()); 3498 } 3499 3500 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3501 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3502 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3503 } 3504 3505 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3506 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3507 3508 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3509 + mContainerMarginWidth; 3510 3511 // Enforce the width based on actual text widths 3512 mContentView.measure( 3513 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3514 verticalMeasure); 3515 3516 Drawable popupBackground = mPopupWindow.getBackground(); 3517 if (popupBackground != null) { 3518 if (mTempRect == null) mTempRect = new Rect(); 3519 popupBackground.getPadding(mTempRect); 3520 width += mTempRect.left + mTempRect.right; 3521 } 3522 mPopupWindow.setWidth(width); 3523 } 3524 3525 @Override 3526 protected int getTextOffset() { 3527 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3528 } 3529 3530 @Override 3531 protected int getVerticalLocalPosition(int line) { 3532 return mTextView.getLayout().getLineBottom(line) - mContainerMarginTop; 3533 } 3534 3535 @Override 3536 protected int clipVertically(int positionY) { 3537 final int height = mContentView.getMeasuredHeight(); 3538 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3539 return Math.min(positionY, displayMetrics.heightPixels - height); 3540 } 3541 3542 private void hideWithCleanUp() { 3543 for (final SuggestionInfo info : mSuggestionInfos) { 3544 info.clear(); 3545 } 3546 mMisspelledSpanInfo.clear(); 3547 hide(); 3548 } 3549 3550 private boolean updateSuggestions() { 3551 Spannable spannable = (Spannable) mTextView.getText(); 3552 mNumberOfSuggestions = 3553 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3554 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3555 return false; 3556 } 3557 3558 int spanUnionStart = mTextView.getText().length(); 3559 int spanUnionEnd = 0; 3560 3561 for (int i = 0; i < mNumberOfSuggestions; i++) { 3562 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3563 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3564 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3565 } 3566 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3567 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3568 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3569 } 3570 3571 for (int i = 0; i < mNumberOfSuggestions; i++) { 3572 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3573 } 3574 3575 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3576 int addToDictionaryButtonVisibility = View.GONE; 3577 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3578 if (mMisspelledSpanInfo.mSpanStart >= 0 3579 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3580 addToDictionaryButtonVisibility = View.VISIBLE; 3581 } 3582 } 3583 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3584 3585 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3586 final int underlineColor; 3587 if (mNumberOfSuggestions != 0) { 3588 underlineColor = 3589 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3590 } else { 3591 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3592 } 3593 3594 if (underlineColor == 0) { 3595 // Fallback on the default highlight color when the first span does not provide one 3596 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3597 } else { 3598 final float BACKGROUND_TRANSPARENCY = 0.4f; 3599 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3600 mSuggestionRangeSpan.setBackgroundColor( 3601 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3602 } 3603 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3604 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3605 3606 mSuggestionsAdapter.notifyDataSetChanged(); 3607 return true; 3608 } 3609 3610 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3611 int unionEnd) { 3612 final Spannable text = (Spannable) mTextView.getText(); 3613 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3614 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3615 3616 // Adjust the start/end of the suggestion span 3617 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3618 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3619 + suggestionInfo.mText.length(); 3620 3621 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3622 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3623 3624 // Add the text before and after the span. 3625 final String textAsString = text.toString(); 3626 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3627 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3628 } 3629 3630 @Override 3631 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3632 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3633 replaceWithSuggestion(suggestionInfo); 3634 hideWithCleanUp(); 3635 } 3636 } 3637 3638 /** 3639 * An ActionMode Callback class that is used to provide actions while in text insertion or 3640 * selection mode. 3641 * 3642 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3643 * actions, depending on which of these this TextView supports and the current selection. 3644 */ 3645 private class TextActionModeCallback extends ActionMode.Callback2 { 3646 private final Path mSelectionPath = new Path(); 3647 private final RectF mSelectionBounds = new RectF(); 3648 private final boolean mHasSelection; 3649 3650 private int mHandleHeight; 3651 3652 public TextActionModeCallback(boolean hasSelection) { 3653 mHasSelection = hasSelection; 3654 if (mHasSelection) { 3655 SelectionModifierCursorController selectionController = getSelectionController(); 3656 if (selectionController.mStartHandle == null) { 3657 // As these are for initializing selectionController, hide() must be called. 3658 selectionController.initDrawables(); 3659 selectionController.initHandles(); 3660 selectionController.hide(); 3661 } 3662 mHandleHeight = Math.max( 3663 mSelectHandleLeft.getMinimumHeight(), 3664 mSelectHandleRight.getMinimumHeight()); 3665 } else { 3666 InsertionPointCursorController insertionController = getInsertionController(); 3667 if (insertionController != null) { 3668 insertionController.getHandle(); 3669 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3670 } 3671 } 3672 } 3673 3674 @Override 3675 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3676 mode.setTitle(null); 3677 mode.setSubtitle(null); 3678 mode.setTitleOptionalHint(true); 3679 populateMenuWithItems(menu); 3680 3681 Callback customCallback = getCustomCallback(); 3682 if (customCallback != null) { 3683 if (!customCallback.onCreateActionMode(mode, menu)) { 3684 // The custom mode can choose to cancel the action mode, dismiss selection. 3685 Selection.setSelection((Spannable) mTextView.getText(), 3686 mTextView.getSelectionEnd()); 3687 return false; 3688 } 3689 } 3690 3691 if (mTextView.canProcessText()) { 3692 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3693 } 3694 3695 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3696 if (mHasSelection && !mTextView.hasTransientState()) { 3697 mTextView.setHasTransientState(true); 3698 } 3699 return true; 3700 } else { 3701 return false; 3702 } 3703 } 3704 3705 private Callback getCustomCallback() { 3706 return mHasSelection 3707 ? mCustomSelectionActionModeCallback 3708 : mCustomInsertionActionModeCallback; 3709 } 3710 3711 private void populateMenuWithItems(Menu menu) { 3712 if (mTextView.canCut()) { 3713 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3714 com.android.internal.R.string.cut). 3715 setAlphabeticShortcut('x'). 3716 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3717 } 3718 3719 if (mTextView.canCopy()) { 3720 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3721 com.android.internal.R.string.copy). 3722 setAlphabeticShortcut('c'). 3723 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3724 } 3725 3726 if (mTextView.canPaste()) { 3727 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3728 com.android.internal.R.string.paste). 3729 setAlphabeticShortcut('v'). 3730 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3731 } 3732 3733 if (mTextView.canShare()) { 3734 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3735 com.android.internal.R.string.share). 3736 setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3737 } 3738 3739 updateSelectAllItem(menu); 3740 updateReplaceItem(menu); 3741 } 3742 3743 @Override 3744 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3745 updateSelectAllItem(menu); 3746 updateReplaceItem(menu); 3747 3748 Callback customCallback = getCustomCallback(); 3749 if (customCallback != null) { 3750 return customCallback.onPrepareActionMode(mode, menu); 3751 } 3752 return true; 3753 } 3754 3755 private void updateSelectAllItem(Menu menu) { 3756 boolean canSelectAll = mTextView.canSelectAllText(); 3757 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3758 if (canSelectAll && !selectAllItemExists) { 3759 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3760 com.android.internal.R.string.selectAll) 3761 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3762 } else if (!canSelectAll && selectAllItemExists) { 3763 menu.removeItem(TextView.ID_SELECT_ALL); 3764 } 3765 } 3766 3767 private void updateReplaceItem(Menu menu) { 3768 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3769 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3770 if (canReplace && !replaceItemExists) { 3771 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3772 com.android.internal.R.string.replace) 3773 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3774 } else if (!canReplace && replaceItemExists) { 3775 menu.removeItem(TextView.ID_REPLACE); 3776 } 3777 } 3778 3779 @Override 3780 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3781 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3782 return true; 3783 } 3784 Callback customCallback = getCustomCallback(); 3785 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3786 return true; 3787 } 3788 return mTextView.onTextContextMenuItem(item.getItemId()); 3789 } 3790 3791 @Override 3792 public void onDestroyActionMode(ActionMode mode) { 3793 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3794 mTextActionMode = null; 3795 Callback customCallback = getCustomCallback(); 3796 if (customCallback != null) { 3797 customCallback.onDestroyActionMode(mode); 3798 } 3799 3800 if (!mPreserveSelection) { 3801 /* 3802 * Leave current selection when we tentatively destroy action mode for the 3803 * selection. If we're detaching from a window, we'll bring back the selection 3804 * mode when (if) we get reattached. 3805 */ 3806 Selection.setSelection((Spannable) mTextView.getText(), 3807 mTextView.getSelectionEnd()); 3808 } 3809 3810 if (mSelectionModifierCursorController != null) { 3811 mSelectionModifierCursorController.hide(); 3812 } 3813 } 3814 3815 @Override 3816 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3817 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3818 super.onGetContentRect(mode, view, outRect); 3819 return; 3820 } 3821 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3822 // We have a selection. 3823 mSelectionPath.reset(); 3824 mTextView.getLayout().getSelectionPath( 3825 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3826 mSelectionPath.computeBounds(mSelectionBounds, true); 3827 mSelectionBounds.bottom += mHandleHeight; 3828 } else if (mCursorCount == 2) { 3829 // We have a split cursor. In this case, we take the rectangle that includes both 3830 // parts of the cursor to ensure we don't obscure either of them. 3831 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3832 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3833 mSelectionBounds.set( 3834 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3835 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3836 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3837 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3838 + mHandleHeight); 3839 } else { 3840 // We have a single cursor. 3841 Layout layout = mTextView.getLayout(); 3842 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 3843 float primaryHorizontal = clampHorizontalPosition(null, 3844 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 3845 mSelectionBounds.set( 3846 primaryHorizontal, 3847 layout.getLineTop(line), 3848 primaryHorizontal, 3849 layout.getLineTop(line + 1) + mHandleHeight); 3850 } 3851 // Take TextView's padding and scroll into account. 3852 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3853 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3854 outRect.set( 3855 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3856 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3857 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3858 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3859 } 3860 } 3861 3862 /** 3863 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3864 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3865 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3866 */ 3867 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3868 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3869 final int[] mTmpIntOffset = new int[2]; 3870 final Matrix mViewToScreenMatrix = new Matrix(); 3871 3872 @Override 3873 public void updatePosition(int parentPositionX, int parentPositionY, 3874 boolean parentPositionChanged, boolean parentScrolled) { 3875 final InputMethodState ims = mInputMethodState; 3876 if (ims == null || ims.mBatchEditNesting > 0) { 3877 return; 3878 } 3879 final InputMethodManager imm = InputMethodManager.peekInstance(); 3880 if (null == imm) { 3881 return; 3882 } 3883 if (!imm.isActive(mTextView)) { 3884 return; 3885 } 3886 // Skip if the IME has not requested the cursor/anchor position. 3887 if (!imm.isCursorAnchorInfoEnabled()) { 3888 return; 3889 } 3890 Layout layout = mTextView.getLayout(); 3891 if (layout == null) { 3892 return; 3893 } 3894 3895 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3896 builder.reset(); 3897 3898 final int selectionStart = mTextView.getSelectionStart(); 3899 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3900 3901 // Construct transformation matrix from view local coordinates to screen coordinates. 3902 mViewToScreenMatrix.set(mTextView.getMatrix()); 3903 mTextView.getLocationOnScreen(mTmpIntOffset); 3904 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3905 builder.setMatrix(mViewToScreenMatrix); 3906 3907 final float viewportToContentHorizontalOffset = 3908 mTextView.viewportToContentHorizontalOffset(); 3909 final float viewportToContentVerticalOffset = 3910 mTextView.viewportToContentVerticalOffset(); 3911 3912 final CharSequence text = mTextView.getText(); 3913 if (text instanceof Spannable) { 3914 final Spannable sp = (Spannable) text; 3915 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3916 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3917 if (composingTextEnd < composingTextStart) { 3918 final int temp = composingTextEnd; 3919 composingTextEnd = composingTextStart; 3920 composingTextStart = temp; 3921 } 3922 final boolean hasComposingText = 3923 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3924 if (hasComposingText) { 3925 final CharSequence composingText = text.subSequence(composingTextStart, 3926 composingTextEnd); 3927 builder.setComposingText(composingTextStart, composingText); 3928 3929 final int minLine = layout.getLineForOffset(composingTextStart); 3930 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3931 for (int line = minLine; line <= maxLine; ++line) { 3932 final int lineStart = layout.getLineStart(line); 3933 final int lineEnd = layout.getLineEnd(line); 3934 final int offsetStart = Math.max(lineStart, composingTextStart); 3935 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3936 final boolean ltrLine = 3937 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3938 final float[] widths = new float[offsetEnd - offsetStart]; 3939 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3940 final float top = layout.getLineTop(line); 3941 final float bottom = layout.getLineBottom(line); 3942 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3943 final float charWidth = widths[offset - offsetStart]; 3944 final boolean isRtl = layout.isRtlCharAt(offset); 3945 final float primary = layout.getPrimaryHorizontal(offset); 3946 final float secondary = layout.getSecondaryHorizontal(offset); 3947 // TODO: This doesn't work perfectly for text with custom styles and 3948 // TAB chars. 3949 final float left; 3950 final float right; 3951 if (ltrLine) { 3952 if (isRtl) { 3953 left = secondary - charWidth; 3954 right = secondary; 3955 } else { 3956 left = primary; 3957 right = primary + charWidth; 3958 } 3959 } else { 3960 if (!isRtl) { 3961 left = secondary; 3962 right = secondary + charWidth; 3963 } else { 3964 left = primary - charWidth; 3965 right = primary; 3966 } 3967 } 3968 // TODO: Check top-right and bottom-left as well. 3969 final float localLeft = left + viewportToContentHorizontalOffset; 3970 final float localRight = right + viewportToContentHorizontalOffset; 3971 final float localTop = top + viewportToContentVerticalOffset; 3972 final float localBottom = bottom + viewportToContentVerticalOffset; 3973 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3974 final boolean isBottomRightVisible = 3975 isPositionVisible(localRight, localBottom); 3976 int characterBoundsFlags = 0; 3977 if (isTopLeftVisible || isBottomRightVisible) { 3978 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3979 } 3980 if (!isTopLeftVisible || !isBottomRightVisible) { 3981 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3982 } 3983 if (isRtl) { 3984 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3985 } 3986 // Here offset is the index in Java chars. 3987 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3988 localBottom, characterBoundsFlags); 3989 } 3990 } 3991 } 3992 } 3993 3994 // Treat selectionStart as the insertion point. 3995 if (0 <= selectionStart) { 3996 final int offset = selectionStart; 3997 final int line = layout.getLineForOffset(offset); 3998 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3999 + viewportToContentHorizontalOffset; 4000 final float insertionMarkerTop = layout.getLineTop(line) 4001 + viewportToContentVerticalOffset; 4002 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4003 + viewportToContentVerticalOffset; 4004 final float insertionMarkerBottom = layout.getLineBottom(line) 4005 + viewportToContentVerticalOffset; 4006 final boolean isTopVisible = 4007 isPositionVisible(insertionMarkerX, insertionMarkerTop); 4008 final boolean isBottomVisible = 4009 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4010 int insertionMarkerFlags = 0; 4011 if (isTopVisible || isBottomVisible) { 4012 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4013 } 4014 if (!isTopVisible || !isBottomVisible) { 4015 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4016 } 4017 if (layout.isRtlCharAt(offset)) { 4018 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4019 } 4020 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4021 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4022 } 4023 4024 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4025 } 4026 } 4027 4028 @VisibleForTesting 4029 public abstract class HandleView extends View implements TextViewPositionListener { 4030 protected Drawable mDrawable; 4031 protected Drawable mDrawableLtr; 4032 protected Drawable mDrawableRtl; 4033 private final PopupWindow mContainer; 4034 // Position with respect to the parent TextView 4035 private int mPositionX, mPositionY; 4036 private boolean mIsDragging; 4037 // Offset from touch position to mPosition 4038 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4039 protected int mHotspotX; 4040 protected int mHorizontalGravity; 4041 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4042 private float mTouchOffsetY; 4043 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4044 private float mIdealVerticalOffset; 4045 // Parent's (TextView) previous position in window 4046 private int mLastParentX, mLastParentY; 4047 // Parent's (TextView) previous position on screen 4048 private int mLastParentXOnScreen, mLastParentYOnScreen; 4049 // Previous text character offset 4050 protected int mPreviousOffset = -1; 4051 // Previous text character offset 4052 private boolean mPositionHasChanged = true; 4053 // Minimum touch target size for handles 4054 private int mMinSize; 4055 // Indicates the line of text that the handle is on. 4056 protected int mPrevLine = UNSET_LINE; 4057 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4058 // when selecting text when the handles jump to the end / start of words which may be on 4059 // a different line. 4060 protected int mPreviousLineTouched = UNSET_LINE; 4061 4062 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4063 super(mTextView.getContext()); 4064 setId(id); 4065 mContainer = new PopupWindow(mTextView.getContext(), null, 4066 com.android.internal.R.attr.textSelectHandleWindowStyle); 4067 mContainer.setSplitTouchEnabled(true); 4068 mContainer.setClippingEnabled(false); 4069 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4070 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4071 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4072 mContainer.setContentView(this); 4073 4074 mDrawableLtr = drawableLtr; 4075 mDrawableRtl = drawableRtl; 4076 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4077 com.android.internal.R.dimen.text_handle_min_size); 4078 4079 updateDrawable(); 4080 4081 final int handleHeight = getPreferredHeight(); 4082 mTouchOffsetY = -0.3f * handleHeight; 4083 mIdealVerticalOffset = 0.7f * handleHeight; 4084 } 4085 4086 public float getIdealVerticalOffset() { 4087 return mIdealVerticalOffset; 4088 } 4089 4090 protected void updateDrawable() { 4091 if (mIsDragging) { 4092 // Don't update drawable during dragging. 4093 return; 4094 } 4095 final Layout layout = mTextView.getLayout(); 4096 if (layout == null) { 4097 return; 4098 } 4099 final int offset = getCurrentCursorOffset(); 4100 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4101 final Drawable oldDrawable = mDrawable; 4102 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4103 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4104 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4105 if (oldDrawable != mDrawable && isShowing()) { 4106 // Update popup window position. 4107 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX - 4108 getHorizontalOffset() + getCursorOffset(); 4109 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4110 mPositionHasChanged = true; 4111 updatePosition(mLastParentX, mLastParentY, false, false); 4112 postInvalidate(); 4113 } 4114 } 4115 4116 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4117 protected abstract int getHorizontalGravity(boolean isRtlRun); 4118 4119 // Touch-up filter: number of previous positions remembered 4120 private static final int HISTORY_SIZE = 5; 4121 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4122 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4123 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4124 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4125 private int mPreviousOffsetIndex = 0; 4126 private int mNumberPreviousOffsets = 0; 4127 4128 private void startTouchUpFilter(int offset) { 4129 mNumberPreviousOffsets = 0; 4130 addPositionToTouchUpFilter(offset); 4131 } 4132 4133 private void addPositionToTouchUpFilter(int offset) { 4134 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4135 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4136 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4137 mNumberPreviousOffsets++; 4138 } 4139 4140 private void filterOnTouchUp() { 4141 final long now = SystemClock.uptimeMillis(); 4142 int i = 0; 4143 int index = mPreviousOffsetIndex; 4144 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4145 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4146 i++; 4147 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4148 } 4149 4150 if (i > 0 && i < iMax && 4151 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4152 positionAtCursorOffset(mPreviousOffsets[index], false); 4153 } 4154 } 4155 4156 public boolean offsetHasBeenChanged() { 4157 return mNumberPreviousOffsets > 1; 4158 } 4159 4160 @Override 4161 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4162 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4163 } 4164 4165 @Override 4166 public void invalidate() { 4167 super.invalidate(); 4168 if (isShowing()) { 4169 positionAtCursorOffset(getCurrentCursorOffset(), true); 4170 } 4171 }; 4172 4173 private int getPreferredWidth() { 4174 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4175 } 4176 4177 private int getPreferredHeight() { 4178 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4179 } 4180 4181 public void show() { 4182 if (isShowing()) return; 4183 4184 getPositionListener().addSubscriber(this, true /* local position may change */); 4185 4186 // Make sure the offset is always considered new, even when focusing at same position 4187 mPreviousOffset = -1; 4188 positionAtCursorOffset(getCurrentCursorOffset(), false); 4189 } 4190 4191 protected void dismiss() { 4192 mIsDragging = false; 4193 mContainer.dismiss(); 4194 onDetached(); 4195 } 4196 4197 public void hide() { 4198 dismiss(); 4199 4200 getPositionListener().removeSubscriber(this); 4201 } 4202 4203 public boolean isShowing() { 4204 return mContainer.isShowing(); 4205 } 4206 4207 private boolean isVisible() { 4208 // Always show a dragging handle. 4209 if (mIsDragging) { 4210 return true; 4211 } 4212 4213 if (mTextView.isInBatchEditMode()) { 4214 return false; 4215 } 4216 4217 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4218 } 4219 4220 public abstract int getCurrentCursorOffset(); 4221 4222 protected abstract void updateSelection(int offset); 4223 4224 public abstract void updatePosition(float x, float y); 4225 4226 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4227 return layout.isRtlCharAt(offset); 4228 } 4229 4230 @VisibleForTesting 4231 public float getHorizontal(@NonNull Layout layout, int offset) { 4232 return layout.getPrimaryHorizontal(offset); 4233 } 4234 4235 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4236 return mTextView.getOffsetAtCoordinate(line, x); 4237 } 4238 4239 /** 4240 * @param offset Cursor offset. Must be in [-1, length]. 4241 * @param forceUpdatePosition whether to force update the position. This should be true 4242 * when If the parent has been scrolled, for example. 4243 */ 4244 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4245 // A HandleView relies on the layout, which may be nulled by external methods 4246 Layout layout = mTextView.getLayout(); 4247 if (layout == null) { 4248 // Will update controllers' state, hiding them and stopping selection mode if needed 4249 prepareCursorControllers(); 4250 return; 4251 } 4252 layout = mTextView.getLayout(); 4253 4254 boolean offsetChanged = offset != mPreviousOffset; 4255 if (offsetChanged || forceUpdatePosition) { 4256 if (offsetChanged) { 4257 updateSelection(offset); 4258 addPositionToTouchUpFilter(offset); 4259 } 4260 final int line = layout.getLineForOffset(offset); 4261 mPrevLine = line; 4262 4263 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX - 4264 getHorizontalOffset() + getCursorOffset(); 4265 mPositionY = layout.getLineBottom(line); 4266 4267 // Take TextView's padding and scroll into account. 4268 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4269 mPositionY += mTextView.viewportToContentVerticalOffset(); 4270 4271 mPreviousOffset = offset; 4272 mPositionHasChanged = true; 4273 } 4274 } 4275 4276 /** 4277 * Return the clamped horizontal position for the first cursor. 4278 * 4279 * @param layout Text layout. 4280 * @param offset Character offset for the cursor. 4281 * @return The clamped horizontal position for the cursor. 4282 */ 4283 int getCursorHorizontalPosition(Layout layout, int offset) { 4284 return (int) (getHorizontal(layout, offset) - 0.5f); 4285 } 4286 4287 @Override 4288 public void updatePosition(int parentPositionX, int parentPositionY, 4289 boolean parentPositionChanged, boolean parentScrolled) { 4290 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 4291 if (parentPositionChanged || mPositionHasChanged) { 4292 if (mIsDragging) { 4293 // Update touchToWindow offset in case of parent scrolling while dragging 4294 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4295 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4296 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4297 mLastParentX = parentPositionX; 4298 mLastParentY = parentPositionY; 4299 } 4300 4301 onHandleMoved(); 4302 } 4303 4304 if (isVisible()) { 4305 // Transform to the window coordinates to follow the view tranformation. 4306 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4307 mTextView.transformFromViewToWindowSpace(pts); 4308 pts[0] -= mHotspotX + getHorizontalOffset(); 4309 4310 if (isShowing()) { 4311 mContainer.update(pts[0], pts[1], -1, -1); 4312 } else { 4313 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4314 } 4315 } else { 4316 if (isShowing()) { 4317 dismiss(); 4318 } 4319 } 4320 4321 mPositionHasChanged = false; 4322 } 4323 } 4324 4325 @Override 4326 protected void onDraw(Canvas c) { 4327 final int drawWidth = mDrawable.getIntrinsicWidth(); 4328 final int left = getHorizontalOffset(); 4329 4330 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4331 mDrawable.draw(c); 4332 } 4333 4334 private int getHorizontalOffset() { 4335 final int width = getPreferredWidth(); 4336 final int drawWidth = mDrawable.getIntrinsicWidth(); 4337 final int left; 4338 switch (mHorizontalGravity) { 4339 case Gravity.LEFT: 4340 left = 0; 4341 break; 4342 default: 4343 case Gravity.CENTER: 4344 left = (width - drawWidth) / 2; 4345 break; 4346 case Gravity.RIGHT: 4347 left = width - drawWidth; 4348 break; 4349 } 4350 return left; 4351 } 4352 4353 protected int getCursorOffset() { 4354 return 0; 4355 } 4356 4357 @Override 4358 public boolean onTouchEvent(MotionEvent ev) { 4359 updateFloatingToolbarVisibility(ev); 4360 4361 switch (ev.getActionMasked()) { 4362 case MotionEvent.ACTION_DOWN: { 4363 startTouchUpFilter(getCurrentCursorOffset()); 4364 4365 final PositionListener positionListener = getPositionListener(); 4366 mLastParentX = positionListener.getPositionX(); 4367 mLastParentY = positionListener.getPositionY(); 4368 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4369 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4370 4371 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4372 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4373 mTouchToWindowOffsetX = xInWindow - mPositionX; 4374 mTouchToWindowOffsetY = yInWindow - mPositionY; 4375 4376 mIsDragging = true; 4377 mPreviousLineTouched = UNSET_LINE; 4378 break; 4379 } 4380 4381 case MotionEvent.ACTION_MOVE: { 4382 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4383 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4384 4385 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4386 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4387 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4388 float newVerticalOffset; 4389 if (previousVerticalOffset < mIdealVerticalOffset) { 4390 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4391 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4392 } else { 4393 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4394 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4395 } 4396 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4397 4398 final float newPosX = 4399 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4400 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4401 4402 updatePosition(newPosX, newPosY); 4403 break; 4404 } 4405 4406 case MotionEvent.ACTION_UP: 4407 filterOnTouchUp(); 4408 mIsDragging = false; 4409 updateDrawable(); 4410 break; 4411 4412 case MotionEvent.ACTION_CANCEL: 4413 mIsDragging = false; 4414 updateDrawable(); 4415 break; 4416 } 4417 return true; 4418 } 4419 4420 public boolean isDragging() { 4421 return mIsDragging; 4422 } 4423 4424 void onHandleMoved() {} 4425 4426 public void onDetached() {} 4427 } 4428 4429 private class InsertionHandleView extends HandleView { 4430 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4431 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4432 4433 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4434 private float mDownPositionX, mDownPositionY; 4435 private Runnable mHider; 4436 4437 public InsertionHandleView(Drawable drawable) { 4438 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4439 } 4440 4441 @Override 4442 public void show() { 4443 super.show(); 4444 4445 final long durationSinceCutOrCopy = 4446 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4447 4448 // Cancel the single tap delayed runnable. 4449 if (mInsertionActionModeRunnable != null 4450 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4451 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4452 || isCursorInsideEasyCorrectionSpan())) { 4453 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4454 } 4455 4456 // Prepare and schedule the single tap runnable to run exactly after the double tap 4457 // timeout has passed. 4458 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4459 && !isCursorInsideEasyCorrectionSpan() 4460 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4461 if (mTextActionMode == null) { 4462 if (mInsertionActionModeRunnable == null) { 4463 mInsertionActionModeRunnable = new Runnable() { 4464 @Override 4465 public void run() { 4466 startInsertionActionMode(); 4467 } 4468 }; 4469 } 4470 mTextView.postDelayed( 4471 mInsertionActionModeRunnable, 4472 ViewConfiguration.getDoubleTapTimeout() + 1); 4473 } 4474 4475 } 4476 4477 hideAfterDelay(); 4478 } 4479 4480 private void hideAfterDelay() { 4481 if (mHider == null) { 4482 mHider = new Runnable() { 4483 public void run() { 4484 hide(); 4485 } 4486 }; 4487 } else { 4488 removeHiderCallback(); 4489 } 4490 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4491 } 4492 4493 private void removeHiderCallback() { 4494 if (mHider != null) { 4495 mTextView.removeCallbacks(mHider); 4496 } 4497 } 4498 4499 @Override 4500 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4501 return drawable.getIntrinsicWidth() / 2; 4502 } 4503 4504 @Override 4505 protected int getHorizontalGravity(boolean isRtlRun) { 4506 return Gravity.CENTER_HORIZONTAL; 4507 } 4508 4509 @Override 4510 protected int getCursorOffset() { 4511 int offset = super.getCursorOffset(); 4512 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4513 if (cursor != null) { 4514 cursor.getPadding(mTempRect); 4515 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4516 } 4517 return offset; 4518 } 4519 4520 @Override 4521 int getCursorHorizontalPosition(Layout layout, int offset) { 4522 final Drawable drawable = mCursorCount > 0 ? mCursorDrawable[0] : null; 4523 if (drawable != null) { 4524 final float horizontal = getHorizontal(layout, offset); 4525 return clampHorizontalPosition(drawable, horizontal) + mTempRect.left; 4526 } 4527 return super.getCursorHorizontalPosition(layout, offset); 4528 } 4529 4530 @Override 4531 public boolean onTouchEvent(MotionEvent ev) { 4532 final boolean result = super.onTouchEvent(ev); 4533 4534 switch (ev.getActionMasked()) { 4535 case MotionEvent.ACTION_DOWN: 4536 mDownPositionX = ev.getRawX(); 4537 mDownPositionY = ev.getRawY(); 4538 break; 4539 4540 case MotionEvent.ACTION_UP: 4541 if (!offsetHasBeenChanged()) { 4542 final float deltaX = mDownPositionX - ev.getRawX(); 4543 final float deltaY = mDownPositionY - ev.getRawY(); 4544 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4545 4546 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4547 mTextView.getContext()); 4548 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4549 4550 if (distanceSquared < touchSlop * touchSlop) { 4551 // Tapping on the handle toggles the insertion action mode. 4552 if (mTextActionMode != null) { 4553 stopTextActionMode(); 4554 } else { 4555 startInsertionActionMode(); 4556 } 4557 } 4558 } else { 4559 if (mTextActionMode != null) { 4560 mTextActionMode.invalidateContentRect(); 4561 } 4562 } 4563 hideAfterDelay(); 4564 break; 4565 4566 case MotionEvent.ACTION_CANCEL: 4567 hideAfterDelay(); 4568 break; 4569 4570 default: 4571 break; 4572 } 4573 4574 return result; 4575 } 4576 4577 @Override 4578 public int getCurrentCursorOffset() { 4579 return mTextView.getSelectionStart(); 4580 } 4581 4582 @Override 4583 public void updateSelection(int offset) { 4584 Selection.setSelection((Spannable) mTextView.getText(), offset); 4585 } 4586 4587 @Override 4588 public void updatePosition(float x, float y) { 4589 Layout layout = mTextView.getLayout(); 4590 int offset; 4591 if (layout != null) { 4592 if (mPreviousLineTouched == UNSET_LINE) { 4593 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4594 } 4595 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4596 offset = getOffsetAtCoordinate(layout, currLine, x); 4597 mPreviousLineTouched = currLine; 4598 } else { 4599 offset = -1; 4600 } 4601 positionAtCursorOffset(offset, false); 4602 if (mTextActionMode != null) { 4603 mTextActionMode.invalidate(); 4604 } 4605 } 4606 4607 @Override 4608 void onHandleMoved() { 4609 super.onHandleMoved(); 4610 removeHiderCallback(); 4611 } 4612 4613 @Override 4614 public void onDetached() { 4615 super.onDetached(); 4616 removeHiderCallback(); 4617 } 4618 } 4619 4620 @Retention(RetentionPolicy.SOURCE) 4621 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4622 public @interface HandleType {} 4623 public static final int HANDLE_TYPE_SELECTION_START = 0; 4624 public static final int HANDLE_TYPE_SELECTION_END = 1; 4625 4626 private class SelectionHandleView extends HandleView { 4627 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4628 // end (HANDLE_TYPE_SELECTION_END). 4629 @HandleType 4630 private final int mHandleType; 4631 // Indicates whether the cursor is making adjustments within a word. 4632 private boolean mInWord = false; 4633 // Difference between touch position and word boundary position. 4634 private float mTouchWordDelta; 4635 // X value of the previous updatePosition call. 4636 private float mPrevX; 4637 // Indicates if the handle has moved a boundary between LTR and RTL text. 4638 private boolean mLanguageDirectionChanged = false; 4639 // Distance from edge of horizontally scrolling text view 4640 // to use to switch to character mode. 4641 private final float mTextViewEdgeSlop; 4642 // Used to save text view location. 4643 private final int[] mTextViewLocation = new int[2]; 4644 4645 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4646 @HandleType int handleType) { 4647 super(drawableLtr, drawableRtl, id); 4648 mHandleType = handleType; 4649 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4650 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4651 } 4652 4653 private boolean isStartHandle() { 4654 return mHandleType == HANDLE_TYPE_SELECTION_START; 4655 } 4656 4657 @Override 4658 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4659 if (isRtlRun == isStartHandle()) { 4660 return drawable.getIntrinsicWidth() / 4; 4661 } else { 4662 return (drawable.getIntrinsicWidth() * 3) / 4; 4663 } 4664 } 4665 4666 @Override 4667 protected int getHorizontalGravity(boolean isRtlRun) { 4668 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4669 } 4670 4671 @Override 4672 public int getCurrentCursorOffset() { 4673 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4674 } 4675 4676 @Override 4677 protected void updateSelection(int offset) { 4678 if (isStartHandle()) { 4679 Selection.setSelection((Spannable) mTextView.getText(), offset, 4680 mTextView.getSelectionEnd()); 4681 } else { 4682 Selection.setSelection((Spannable) mTextView.getText(), 4683 mTextView.getSelectionStart(), offset); 4684 } 4685 updateDrawable(); 4686 if (mTextActionMode != null) { 4687 mTextActionMode.invalidate(); 4688 } 4689 } 4690 4691 @Override 4692 public void updatePosition(float x, float y) { 4693 final Layout layout = mTextView.getLayout(); 4694 if (layout == null) { 4695 // HandleView will deal appropriately in positionAtCursorOffset when 4696 // layout is null. 4697 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y)); 4698 return; 4699 } 4700 4701 if (mPreviousLineTouched == UNSET_LINE) { 4702 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4703 } 4704 4705 boolean positionCursor = false; 4706 final int anotherHandleOffset = 4707 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4708 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4709 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4710 4711 if (isStartHandle() && initialOffset >= anotherHandleOffset 4712 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4713 // Handles have crossed, bound it to the first selected line and 4714 // adjust by word / char as normal. 4715 currLine = layout.getLineForOffset(anotherHandleOffset); 4716 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4717 } 4718 4719 int offset = initialOffset; 4720 final int wordEnd = getWordEnd(offset); 4721 final int wordStart = getWordStart(offset); 4722 4723 if (mPrevX == UNSET_X_VALUE) { 4724 mPrevX = x; 4725 } 4726 4727 final int currentOffset = getCurrentCursorOffset(); 4728 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4729 final boolean atRtl = isAtRtlRun(layout, offset); 4730 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4731 4732 // We can't determine if the user is expanding or shrinking the selection if they're 4733 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4734 // the cursor at the current position. 4735 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4736 // We're on a boundary or this is the first direction change -- just update 4737 // to the current position. 4738 mLanguageDirectionChanged = true; 4739 mTouchWordDelta = 0.0f; 4740 positionAndAdjustForCrossingHandles(offset); 4741 return; 4742 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4743 // We've just moved past the boundary so update the position. After this we can 4744 // figure out if the user is expanding or shrinking to go by word or character. 4745 positionAndAdjustForCrossingHandles(offset); 4746 mTouchWordDelta = 0.0f; 4747 mLanguageDirectionChanged = false; 4748 return; 4749 } 4750 4751 boolean isExpanding; 4752 final float xDiff = x - mPrevX; 4753 if (isStartHandle()) { 4754 isExpanding = currLine < mPreviousLineTouched; 4755 } else { 4756 isExpanding = currLine > mPreviousLineTouched; 4757 } 4758 if (atRtl == isStartHandle()) { 4759 isExpanding |= xDiff > 0; 4760 } else { 4761 isExpanding |= xDiff < 0; 4762 } 4763 4764 if (mTextView.getHorizontallyScrolling()) { 4765 if (positionNearEdgeOfScrollingView(x, atRtl) 4766 && ((isStartHandle() && mTextView.getScrollX() != 0) 4767 || (!isStartHandle() 4768 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4769 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4770 || (!isStartHandle() && offset > currentOffset))) 4771 || !isExpanding)) { 4772 // If we're expanding ensure that the offset is actually expanding compared to 4773 // the current offset, if the handle snapped to the word, the finger position 4774 // may be out of sync and we don't want the selection to jump back. 4775 mTouchWordDelta = 0.0f; 4776 final int nextOffset = (atRtl == isStartHandle()) 4777 ? layout.getOffsetToRightOf(mPreviousOffset) 4778 : layout.getOffsetToLeftOf(mPreviousOffset); 4779 positionAndAdjustForCrossingHandles(nextOffset); 4780 return; 4781 } 4782 } 4783 4784 if (isExpanding) { 4785 // User is increasing the selection. 4786 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4787 final boolean snapToWord = (!mInWord 4788 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4789 && atRtl == isAtRtlRun(layout, wordBoundary); 4790 if (snapToWord) { 4791 // Sometimes words can be broken across lines (Chinese, hyphenation). 4792 // We still snap to the word boundary but we only use the letters on the 4793 // current line to determine if the user is far enough into the word to snap. 4794 if (layout.getLineForOffset(wordBoundary) != currLine) { 4795 wordBoundary = isStartHandle() ? 4796 layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4797 } 4798 final int offsetThresholdToSnap = isStartHandle() 4799 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4800 : wordStart + ((wordBoundary - wordStart) / 2); 4801 if (isStartHandle() 4802 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4803 // User is far enough into the word or on a different line so we expand by 4804 // word. 4805 offset = wordStart; 4806 } else if (!isStartHandle() 4807 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4808 // User is far enough into the word or on a different line so we expand by 4809 // word. 4810 offset = wordEnd; 4811 } else { 4812 offset = mPreviousOffset; 4813 } 4814 } 4815 if ((isStartHandle() && offset < initialOffset) 4816 || (!isStartHandle() && offset > initialOffset)) { 4817 final float adjustedX = getHorizontal(layout, offset); 4818 mTouchWordDelta = 4819 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4820 } else { 4821 mTouchWordDelta = 0.0f; 4822 } 4823 positionCursor = true; 4824 } else { 4825 final int adjustedOffset = 4826 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4827 final boolean shrinking = isStartHandle() 4828 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4829 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4830 if (shrinking) { 4831 // User is shrinking the selection. 4832 if (currLine != mPrevLine) { 4833 // We're on a different line, so we'll snap to word boundaries. 4834 offset = isStartHandle() ? wordStart : wordEnd; 4835 if ((isStartHandle() && offset < initialOffset) 4836 || (!isStartHandle() && offset > initialOffset)) { 4837 final float adjustedX = getHorizontal(layout, offset); 4838 mTouchWordDelta = 4839 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4840 } else { 4841 mTouchWordDelta = 0.0f; 4842 } 4843 } else { 4844 offset = adjustedOffset; 4845 } 4846 positionCursor = true; 4847 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4848 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4849 // Handle has jumped to the word boundary, and the user is moving 4850 // their finger towards the handle, the delta should be updated. 4851 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) - 4852 getHorizontal(layout, mPreviousOffset); 4853 } 4854 } 4855 4856 if (positionCursor) { 4857 mPreviousLineTouched = currLine; 4858 positionAndAdjustForCrossingHandles(offset); 4859 } 4860 mPrevX = x; 4861 } 4862 4863 @Override 4864 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4865 super.positionAtCursorOffset(offset, forceUpdatePosition); 4866 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 4867 } 4868 4869 @Override 4870 public boolean onTouchEvent(MotionEvent event) { 4871 boolean superResult = super.onTouchEvent(event); 4872 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 4873 // Reset the touch word offset and x value when the user 4874 // re-engages the handle. 4875 mTouchWordDelta = 0.0f; 4876 mPrevX = UNSET_X_VALUE; 4877 } 4878 return superResult; 4879 } 4880 4881 private void positionAndAdjustForCrossingHandles(int offset) { 4882 final int anotherHandleOffset = 4883 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4884 if ((isStartHandle() && offset >= anotherHandleOffset) 4885 || (!isStartHandle() && offset <= anotherHandleOffset)) { 4886 mTouchWordDelta = 0.0f; 4887 final Layout layout = mTextView.getLayout(); 4888 if (layout != null && offset != anotherHandleOffset) { 4889 final float horiz = getHorizontal(layout, offset); 4890 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 4891 !isStartHandle()); 4892 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 4893 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 4894 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 4895 // This handle passes another one as it crossed a direction boundary. 4896 // Don't minimize the selection, but keep the handle at the run boundary. 4897 final int currentOffset = getCurrentCursorOffset(); 4898 final int offsetToGetRunRange = isStartHandle() ? 4899 currentOffset : Math.max(currentOffset - 1, 0); 4900 final long range = layout.getRunRange(offsetToGetRunRange); 4901 if (isStartHandle()) { 4902 offset = TextUtils.unpackRangeStartFromLong(range); 4903 } else { 4904 offset = TextUtils.unpackRangeEndFromLong(range); 4905 } 4906 positionAtCursorOffset(offset, false); 4907 return; 4908 } 4909 } 4910 // Handles can not cross and selection is at least one character. 4911 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 4912 } 4913 positionAtCursorOffset(offset, false); 4914 } 4915 4916 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 4917 mTextView.getLocationOnScreen(mTextViewLocation); 4918 boolean nearEdge; 4919 if (atRtl == isStartHandle()) { 4920 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 4921 - mTextView.getPaddingRight(); 4922 nearEdge = x > rightEdge - mTextViewEdgeSlop; 4923 } else { 4924 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 4925 nearEdge = x < leftEdge + mTextViewEdgeSlop; 4926 } 4927 return nearEdge; 4928 } 4929 4930 @Override 4931 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4932 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 4933 return layout.isRtlCharAt(offsetToCheck); 4934 } 4935 4936 @Override 4937 public float getHorizontal(@NonNull Layout layout, int offset) { 4938 return getHorizontal(layout, offset, isStartHandle()); 4939 } 4940 4941 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 4942 final int line = layout.getLineForOffset(offset); 4943 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 4944 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 4945 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 4946 return (isRtlChar == isRtlParagraph) ? 4947 layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 4948 } 4949 4950 @Override 4951 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4952 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 4953 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 4954 if (!layout.isLevelBoundary(primaryOffset)) { 4955 return primaryOffset; 4956 } 4957 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 4958 final int currentOffset = getCurrentCursorOffset(); 4959 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 4960 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 4961 if (primaryDiff < secondaryDiff) { 4962 return primaryOffset; 4963 } else if (primaryDiff > secondaryDiff) { 4964 return secondaryOffset; 4965 } else { 4966 final int offsetToCheck = isStartHandle() ? 4967 currentOffset : Math.max(currentOffset - 1, 0); 4968 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 4969 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 4970 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 4971 } 4972 } 4973 } 4974 4975 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 4976 final int trueLine = mTextView.getLineAtCoordinate(y); 4977 if (layout == null || prevLine > layout.getLineCount() 4978 || layout.getLineCount() <= 0 || prevLine < 0) { 4979 // Invalid parameters, just return whatever line is at y. 4980 return trueLine; 4981 } 4982 4983 if (Math.abs(trueLine - prevLine) >= 2) { 4984 // Only stick to lines if we're within a line of the previous selection. 4985 return trueLine; 4986 } 4987 4988 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 4989 final int lineCount = layout.getLineCount(); 4990 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 4991 4992 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 4993 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 4994 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 4995 4996 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 4997 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 4998 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 4999 5000 // Determine if we've moved lines based on y position and previous line. 5001 int currLine; 5002 if (y <= yTopBound) { 5003 currLine = Math.max(prevLine - 1, 0); 5004 } else if (y >= yBottomBound) { 5005 currLine = Math.min(prevLine + 1, lineCount - 1); 5006 } else { 5007 currLine = prevLine; 5008 } 5009 return currLine; 5010 } 5011 5012 /** 5013 * A CursorController instance can be used to control a cursor in the text. 5014 */ 5015 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5016 /** 5017 * Makes the cursor controller visible on screen. 5018 * See also {@link #hide()}. 5019 */ 5020 public void show(); 5021 5022 /** 5023 * Hide the cursor controller from screen. 5024 * See also {@link #show()}. 5025 */ 5026 public void hide(); 5027 5028 /** 5029 * Called when the view is detached from window. Perform house keeping task, such as 5030 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5031 * preventing the activity from being recycled. 5032 */ 5033 public void onDetached(); 5034 5035 public boolean isCursorBeingModified(); 5036 5037 public boolean isActive(); 5038 } 5039 5040 private class InsertionPointCursorController implements CursorController { 5041 private InsertionHandleView mHandle; 5042 5043 public void show() { 5044 getHandle().show(); 5045 5046 if (mSelectionModifierCursorController != null) { 5047 mSelectionModifierCursorController.hide(); 5048 } 5049 } 5050 5051 public void hide() { 5052 if (mHandle != null) { 5053 mHandle.hide(); 5054 } 5055 } 5056 5057 public void onTouchModeChanged(boolean isInTouchMode) { 5058 if (!isInTouchMode) { 5059 hide(); 5060 } 5061 } 5062 5063 private InsertionHandleView getHandle() { 5064 if (mSelectHandleCenter == null) { 5065 mSelectHandleCenter = mTextView.getContext().getDrawable( 5066 mTextView.mTextSelectHandleRes); 5067 } 5068 if (mHandle == null) { 5069 mHandle = new InsertionHandleView(mSelectHandleCenter); 5070 } 5071 return mHandle; 5072 } 5073 5074 @Override 5075 public void onDetached() { 5076 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5077 observer.removeOnTouchModeChangeListener(this); 5078 5079 if (mHandle != null) mHandle.onDetached(); 5080 } 5081 5082 @Override 5083 public boolean isCursorBeingModified() { 5084 return mHandle != null && mHandle.isDragging(); 5085 } 5086 5087 @Override 5088 public boolean isActive() { 5089 return mHandle != null && mHandle.isShowing(); 5090 } 5091 5092 public void invalidateHandle() { 5093 if (mHandle != null) { 5094 mHandle.invalidate(); 5095 } 5096 } 5097 } 5098 5099 class SelectionModifierCursorController implements CursorController { 5100 // The cursor controller handles, lazily created when shown. 5101 private SelectionHandleView mStartHandle; 5102 private SelectionHandleView mEndHandle; 5103 // The offsets of that last touch down event. Remembered to start selection there. 5104 private int mMinTouchOffset, mMaxTouchOffset; 5105 5106 private float mDownPositionX, mDownPositionY; 5107 private boolean mGestureStayedInTapRegion; 5108 5109 // Where the user first starts the drag motion. 5110 private int mStartOffset = -1; 5111 5112 private boolean mHaventMovedEnoughToStartDrag; 5113 // The line that a selection happened most recently with the drag accelerator. 5114 private int mLineSelectionIsOn = -1; 5115 // Whether the drag accelerator has selected past the initial line. 5116 private boolean mSwitchedLines = false; 5117 5118 // Indicates the drag accelerator mode that the user is currently using. 5119 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5120 // Drag accelerator is inactive. 5121 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5122 // Character based selection by dragging. Only for mouse. 5123 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5124 // Word based selection by dragging. Enabled after long pressing or double tapping. 5125 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5126 // Paragraph based selection by dragging. Enabled after mouse triple click. 5127 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5128 5129 SelectionModifierCursorController() { 5130 resetTouchOffsets(); 5131 } 5132 5133 public void show() { 5134 if (mTextView.isInBatchEditMode()) { 5135 return; 5136 } 5137 initDrawables(); 5138 initHandles(); 5139 } 5140 5141 private void initDrawables() { 5142 if (mSelectHandleLeft == null) { 5143 mSelectHandleLeft = mTextView.getContext().getDrawable( 5144 mTextView.mTextSelectHandleLeftRes); 5145 } 5146 if (mSelectHandleRight == null) { 5147 mSelectHandleRight = mTextView.getContext().getDrawable( 5148 mTextView.mTextSelectHandleRightRes); 5149 } 5150 } 5151 5152 private void initHandles() { 5153 // Lazy object creation has to be done before updatePosition() is called. 5154 if (mStartHandle == null) { 5155 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5156 com.android.internal.R.id.selection_start_handle, 5157 HANDLE_TYPE_SELECTION_START); 5158 } 5159 if (mEndHandle == null) { 5160 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5161 com.android.internal.R.id.selection_end_handle, 5162 HANDLE_TYPE_SELECTION_END); 5163 } 5164 5165 mStartHandle.show(); 5166 mEndHandle.show(); 5167 5168 hideInsertionPointCursorController(); 5169 } 5170 5171 public void hide() { 5172 if (mStartHandle != null) mStartHandle.hide(); 5173 if (mEndHandle != null) mEndHandle.hide(); 5174 } 5175 5176 public void enterDrag(int dragAcceleratorMode) { 5177 // Just need to init the handles / hide insertion cursor. 5178 show(); 5179 mDragAcceleratorMode = dragAcceleratorMode; 5180 // Start location of selection. 5181 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5182 mLastDownPositionY); 5183 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5184 // Don't show the handles until user has lifted finger. 5185 hide(); 5186 5187 // This stops scrolling parents from intercepting the touch event, allowing 5188 // the user to continue dragging across the screen to select text; TextView will 5189 // scroll as necessary. 5190 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5191 mTextView.cancelLongPress(); 5192 } 5193 5194 public void onTouchEvent(MotionEvent event) { 5195 // This is done even when the View does not have focus, so that long presses can start 5196 // selection and tap can move cursor from this tap position. 5197 final float eventX = event.getX(); 5198 final float eventY = event.getY(); 5199 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5200 switch (event.getActionMasked()) { 5201 case MotionEvent.ACTION_DOWN: 5202 if (extractedTextModeWillBeStarted()) { 5203 // Prevent duplicating the selection handles until the mode starts. 5204 hide(); 5205 } else { 5206 // Remember finger down position, to be able to start selection from there. 5207 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5208 eventX, eventY); 5209 5210 // Double tap detection 5211 if (mGestureStayedInTapRegion) { 5212 if (mTapState == TAP_STATE_DOUBLE_TAP 5213 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5214 final float deltaX = eventX - mDownPositionX; 5215 final float deltaY = eventY - mDownPositionY; 5216 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5217 5218 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5219 mTextView.getContext()); 5220 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5221 boolean stayedInArea = 5222 distanceSquared < doubleTapSlop * doubleTapSlop; 5223 5224 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5225 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5226 selectCurrentWordAndStartDrag(); 5227 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5228 selectCurrentParagraphAndStartDrag(); 5229 } 5230 mDiscardNextActionUp = true; 5231 } 5232 } 5233 } 5234 5235 mDownPositionX = eventX; 5236 mDownPositionY = eventY; 5237 mGestureStayedInTapRegion = true; 5238 mHaventMovedEnoughToStartDrag = true; 5239 } 5240 break; 5241 5242 case MotionEvent.ACTION_POINTER_DOWN: 5243 case MotionEvent.ACTION_POINTER_UP: 5244 // Handle multi-point gestures. Keep min and max offset positions. 5245 // Only activated for devices that correctly handle multi-touch. 5246 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5247 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5248 updateMinAndMaxOffsets(event); 5249 } 5250 break; 5251 5252 case MotionEvent.ACTION_MOVE: 5253 final ViewConfiguration viewConfig = ViewConfiguration.get( 5254 mTextView.getContext()); 5255 final int touchSlop = viewConfig.getScaledTouchSlop(); 5256 5257 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5258 final float deltaX = eventX - mDownPositionX; 5259 final float deltaY = eventY - mDownPositionY; 5260 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5261 5262 if (mGestureStayedInTapRegion) { 5263 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5264 mGestureStayedInTapRegion = 5265 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5266 } 5267 if (mHaventMovedEnoughToStartDrag) { 5268 // We don't start dragging until the user has moved enough. 5269 mHaventMovedEnoughToStartDrag = 5270 distanceSquared <= touchSlop * touchSlop; 5271 } 5272 } 5273 5274 if (isMouse && !isDragAcceleratorActive()) { 5275 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5276 if (mTextView.hasSelection() 5277 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5278 && offset >= mTextView.getSelectionStart() 5279 && offset <= mTextView.getSelectionEnd()) { 5280 startDragAndDrop(); 5281 break; 5282 } 5283 5284 if (mStartOffset != offset) { 5285 // Start character based drag accelerator. 5286 stopTextActionMode(); 5287 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5288 mDiscardNextActionUp = true; 5289 mHaventMovedEnoughToStartDrag = false; 5290 } 5291 } 5292 5293 if (mStartHandle != null && mStartHandle.isShowing()) { 5294 // Don't do the drag if the handles are showing already. 5295 break; 5296 } 5297 5298 updateSelection(event); 5299 break; 5300 5301 case MotionEvent.ACTION_UP: 5302 if (!isDragAcceleratorActive()) { 5303 break; 5304 } 5305 updateSelection(event); 5306 5307 // No longer dragging to select text, let the parent intercept events. 5308 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5309 5310 // No longer the first dragging motion, reset. 5311 resetDragAcceleratorState(); 5312 5313 if (mTextView.hasSelection()) { 5314 startSelectionActionMode(); 5315 } 5316 break; 5317 } 5318 } 5319 5320 private void updateSelection(MotionEvent event) { 5321 if (mTextView.getLayout() != null) { 5322 switch (mDragAcceleratorMode) { 5323 case DRAG_ACCELERATOR_MODE_CHARACTER: 5324 updateCharacterBasedSelection(event); 5325 break; 5326 case DRAG_ACCELERATOR_MODE_WORD: 5327 updateWordBasedSelection(event); 5328 break; 5329 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5330 updateParagraphBasedSelection(event); 5331 break; 5332 } 5333 } 5334 } 5335 5336 /** 5337 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5338 * 5339 * @return true if the drag was started. 5340 */ 5341 private boolean selectCurrentParagraphAndStartDrag() { 5342 if (mInsertionActionModeRunnable != null) { 5343 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5344 } 5345 stopTextActionMode(); 5346 if (!selectCurrentParagraph()) { 5347 return false; 5348 } 5349 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5350 return true; 5351 } 5352 5353 private void updateCharacterBasedSelection(MotionEvent event) { 5354 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5355 Selection.setSelection((Spannable) mTextView.getText(), mStartOffset, offset); 5356 } 5357 5358 private void updateWordBasedSelection(MotionEvent event) { 5359 if (mHaventMovedEnoughToStartDrag) { 5360 return; 5361 } 5362 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5363 final ViewConfiguration viewConfig = ViewConfiguration.get( 5364 mTextView.getContext()); 5365 final float eventX = event.getX(); 5366 final float eventY = event.getY(); 5367 final int currLine; 5368 if (isMouse) { 5369 // No need to offset the y coordinate for mouse input. 5370 currLine = mTextView.getLineAtCoordinate(eventY); 5371 } else { 5372 float y = eventY; 5373 if (mSwitchedLines) { 5374 // Offset the finger by the same vertical offset as the handles. 5375 // This improves visibility of the content being selected by 5376 // shifting the finger below the content, this is applied once 5377 // the user has switched lines. 5378 final int touchSlop = viewConfig.getScaledTouchSlop(); 5379 final float fingerOffset = (mStartHandle != null) 5380 ? mStartHandle.getIdealVerticalOffset() 5381 : touchSlop; 5382 y = eventY - fingerOffset; 5383 } 5384 5385 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5386 y); 5387 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5388 // Break early here, we want to offset the finger position from 5389 // the selection highlight, once the user moved their finger 5390 // to a different line we should apply the offset and *not* switch 5391 // lines until recomputing the position with the finger offset. 5392 mSwitchedLines = true; 5393 return; 5394 } 5395 } 5396 5397 int startOffset; 5398 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5399 // Snap to word boundaries. 5400 if (mStartOffset < offset) { 5401 // Expanding with end handle. 5402 offset = getWordEnd(offset); 5403 startOffset = getWordStart(mStartOffset); 5404 } else { 5405 // Expanding with start handle. 5406 offset = getWordStart(offset); 5407 startOffset = getWordEnd(mStartOffset); 5408 } 5409 mLineSelectionIsOn = currLine; 5410 Selection.setSelection((Spannable) mTextView.getText(), 5411 startOffset, offset); 5412 } 5413 5414 private void updateParagraphBasedSelection(MotionEvent event) { 5415 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5416 5417 final int start = Math.min(offset, mStartOffset); 5418 final int end = Math.max(offset, mStartOffset); 5419 final long paragraphsRange = getParagraphsRange(start, end); 5420 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5421 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5422 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5423 } 5424 5425 /** 5426 * @param event 5427 */ 5428 private void updateMinAndMaxOffsets(MotionEvent event) { 5429 int pointerCount = event.getPointerCount(); 5430 for (int index = 0; index < pointerCount; index++) { 5431 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5432 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5433 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5434 } 5435 } 5436 5437 public int getMinTouchOffset() { 5438 return mMinTouchOffset; 5439 } 5440 5441 public int getMaxTouchOffset() { 5442 return mMaxTouchOffset; 5443 } 5444 5445 public void resetTouchOffsets() { 5446 mMinTouchOffset = mMaxTouchOffset = -1; 5447 resetDragAcceleratorState(); 5448 } 5449 5450 private void resetDragAcceleratorState() { 5451 mStartOffset = -1; 5452 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5453 mSwitchedLines = false; 5454 final int selectionStart = mTextView.getSelectionStart(); 5455 final int selectionEnd = mTextView.getSelectionEnd(); 5456 if (selectionStart > selectionEnd) { 5457 Selection.setSelection((Spannable) mTextView.getText(), 5458 selectionEnd, selectionStart); 5459 } 5460 } 5461 5462 /** 5463 * @return true iff this controller is currently used to move the selection start. 5464 */ 5465 public boolean isSelectionStartDragged() { 5466 return mStartHandle != null && mStartHandle.isDragging(); 5467 } 5468 5469 @Override 5470 public boolean isCursorBeingModified() { 5471 return isDragAcceleratorActive() || isSelectionStartDragged() 5472 || (mEndHandle != null && mEndHandle.isDragging()); 5473 } 5474 5475 /** 5476 * @return true if the user is selecting text using the drag accelerator. 5477 */ 5478 public boolean isDragAcceleratorActive() { 5479 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5480 } 5481 5482 public void onTouchModeChanged(boolean isInTouchMode) { 5483 if (!isInTouchMode) { 5484 hide(); 5485 } 5486 } 5487 5488 @Override 5489 public void onDetached() { 5490 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5491 observer.removeOnTouchModeChangeListener(this); 5492 5493 if (mStartHandle != null) mStartHandle.onDetached(); 5494 if (mEndHandle != null) mEndHandle.onDetached(); 5495 } 5496 5497 @Override 5498 public boolean isActive() { 5499 return mStartHandle != null && mStartHandle.isShowing(); 5500 } 5501 5502 public void invalidateHandles() { 5503 if (mStartHandle != null) { 5504 mStartHandle.invalidate(); 5505 } 5506 if (mEndHandle != null) { 5507 mEndHandle.invalidate(); 5508 } 5509 } 5510 } 5511 5512 private class CorrectionHighlighter { 5513 private final Path mPath = new Path(); 5514 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5515 private int mStart, mEnd; 5516 private long mFadingStartTime; 5517 private RectF mTempRectF; 5518 private final static int FADE_OUT_DURATION = 400; 5519 5520 public CorrectionHighlighter() { 5521 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 5522 applicationScale); 5523 mPaint.setStyle(Paint.Style.FILL); 5524 } 5525 5526 public void highlight(CorrectionInfo info) { 5527 mStart = info.getOffset(); 5528 mEnd = mStart + info.getNewText().length(); 5529 mFadingStartTime = SystemClock.uptimeMillis(); 5530 5531 if (mStart < 0 || mEnd < 0) { 5532 stopAnimation(); 5533 } 5534 } 5535 5536 public void draw(Canvas canvas, int cursorOffsetVertical) { 5537 if (updatePath() && updatePaint()) { 5538 if (cursorOffsetVertical != 0) { 5539 canvas.translate(0, cursorOffsetVertical); 5540 } 5541 5542 canvas.drawPath(mPath, mPaint); 5543 5544 if (cursorOffsetVertical != 0) { 5545 canvas.translate(0, -cursorOffsetVertical); 5546 } 5547 invalidate(true); // TODO invalidate cursor region only 5548 } else { 5549 stopAnimation(); 5550 invalidate(false); // TODO invalidate cursor region only 5551 } 5552 } 5553 5554 private boolean updatePaint() { 5555 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5556 if (duration > FADE_OUT_DURATION) return false; 5557 5558 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5559 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5560 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 5561 ((int) (highlightColorAlpha * coef) << 24); 5562 mPaint.setColor(color); 5563 return true; 5564 } 5565 5566 private boolean updatePath() { 5567 final Layout layout = mTextView.getLayout(); 5568 if (layout == null) return false; 5569 5570 // Update in case text is edited while the animation is run 5571 final int length = mTextView.getText().length(); 5572 int start = Math.min(length, mStart); 5573 int end = Math.min(length, mEnd); 5574 5575 mPath.reset(); 5576 layout.getSelectionPath(start, end, mPath); 5577 return true; 5578 } 5579 5580 private void invalidate(boolean delayed) { 5581 if (mTextView.getLayout() == null) return; 5582 5583 if (mTempRectF == null) mTempRectF = new RectF(); 5584 mPath.computeBounds(mTempRectF, false); 5585 5586 int left = mTextView.getCompoundPaddingLeft(); 5587 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5588 5589 if (delayed) { 5590 mTextView.postInvalidateOnAnimation( 5591 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5592 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5593 } else { 5594 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5595 (int) mTempRectF.right, (int) mTempRectF.bottom); 5596 } 5597 } 5598 5599 private void stopAnimation() { 5600 Editor.this.mCorrectionHighlighter = null; 5601 } 5602 } 5603 5604 private static class ErrorPopup extends PopupWindow { 5605 private boolean mAbove = false; 5606 private final TextView mView; 5607 private int mPopupInlineErrorBackgroundId = 0; 5608 private int mPopupInlineErrorAboveBackgroundId = 0; 5609 5610 ErrorPopup(TextView v, int width, int height) { 5611 super(v, width, height); 5612 mView = v; 5613 // Make sure the TextView has a background set as it will be used the first time it is 5614 // shown and positioned. Initialized with below background, which should have 5615 // dimensions identical to the above version for this to work (and is more likely). 5616 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5617 com.android.internal.R.styleable.Theme_errorMessageBackground); 5618 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5619 } 5620 5621 void fixDirection(boolean above) { 5622 mAbove = above; 5623 5624 if (above) { 5625 mPopupInlineErrorAboveBackgroundId = 5626 getResourceId(mPopupInlineErrorAboveBackgroundId, 5627 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5628 } else { 5629 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5630 com.android.internal.R.styleable.Theme_errorMessageBackground); 5631 } 5632 5633 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 5634 mPopupInlineErrorBackgroundId); 5635 } 5636 5637 private int getResourceId(int currentId, int index) { 5638 if (currentId == 0) { 5639 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5640 R.styleable.Theme); 5641 currentId = styledAttributes.getResourceId(index, 0); 5642 styledAttributes.recycle(); 5643 } 5644 return currentId; 5645 } 5646 5647 @Override 5648 public void update(int x, int y, int w, int h, boolean force) { 5649 super.update(x, y, w, h, force); 5650 5651 boolean above = isAboveAnchor(); 5652 if (above != mAbove) { 5653 fixDirection(above); 5654 } 5655 } 5656 } 5657 5658 static class InputContentType { 5659 int imeOptions = EditorInfo.IME_NULL; 5660 String privateImeOptions; 5661 CharSequence imeActionLabel; 5662 int imeActionId; 5663 Bundle extras; 5664 OnEditorActionListener onEditorActionListener; 5665 boolean enterDown; 5666 LocaleList imeHintLocales; 5667 } 5668 5669 static class InputMethodState { 5670 ExtractedTextRequest mExtractedTextRequest; 5671 final ExtractedText mExtractedText = new ExtractedText(); 5672 int mBatchEditNesting; 5673 boolean mCursorChanged; 5674 boolean mSelectionModeChanged; 5675 boolean mContentChanged; 5676 int mChangedStart, mChangedEnd, mChangedDelta; 5677 } 5678 5679 /** 5680 * @return True iff (start, end) is a valid range within the text. 5681 */ 5682 private static boolean isValidRange(CharSequence text, int start, int end) { 5683 return 0 <= start && start <= end && end <= text.length(); 5684 } 5685 5686 @VisibleForTesting 5687 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5688 return mSuggestionsPopupWindow; 5689 } 5690 5691 /** 5692 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5693 * text being typed (and hence always returns null from the filter() method). 5694 * 5695 * TODO: Make this span aware. 5696 */ 5697 public static class UndoInputFilter implements InputFilter { 5698 private final Editor mEditor; 5699 5700 // Whether the current filter pass is directly caused by an end-user text edit. 5701 private boolean mIsUserEdit; 5702 5703 // Whether the text field is handling an IME composition. Must be parceled in case the user 5704 // rotates the screen during composition. 5705 private boolean mHasComposition; 5706 5707 // Whether the user is expanding or shortening the text 5708 private boolean mExpanding; 5709 5710 // Whether the previous edit operation was in the current batch edit. 5711 private boolean mPreviousOperationWasInSameBatchEdit; 5712 5713 public UndoInputFilter(Editor editor) { 5714 mEditor = editor; 5715 } 5716 5717 public void saveInstanceState(Parcel parcel) { 5718 parcel.writeInt(mIsUserEdit ? 1 : 0); 5719 parcel.writeInt(mHasComposition ? 1 : 0); 5720 parcel.writeInt(mExpanding ? 1 : 0); 5721 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5722 } 5723 5724 public void restoreInstanceState(Parcel parcel) { 5725 mIsUserEdit = parcel.readInt() != 0; 5726 mHasComposition = parcel.readInt() != 0; 5727 mExpanding = parcel.readInt() != 0; 5728 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5729 } 5730 5731 /** 5732 * Signals that a user-triggered edit is starting. 5733 */ 5734 public void beginBatchEdit() { 5735 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5736 mIsUserEdit = true; 5737 } 5738 5739 public void endBatchEdit() { 5740 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5741 mIsUserEdit = false; 5742 mPreviousOperationWasInSameBatchEdit = false; 5743 } 5744 5745 @Override 5746 public CharSequence filter(CharSequence source, int start, int end, 5747 Spanned dest, int dstart, int dend) { 5748 if (DEBUG_UNDO) { 5749 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 5750 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5751 } 5752 5753 // Check to see if this edit should be tracked for undo. 5754 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5755 return null; 5756 } 5757 5758 final boolean hadComposition = mHasComposition; 5759 mHasComposition = isComposition(source); 5760 final boolean wasExpanding = mExpanding; 5761 boolean shouldCreateSeparateState = false; 5762 if ((end - start) != (dend - dstart)) { 5763 mExpanding = (end - start) > (dend - dstart); 5764 if (hadComposition && mExpanding != wasExpanding) { 5765 shouldCreateSeparateState = true; 5766 } 5767 } 5768 5769 // Handle edit. 5770 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5771 return null; 5772 } 5773 5774 void freezeLastEdit() { 5775 mEditor.mUndoManager.beginUpdate("Edit text"); 5776 EditOperation lastEdit = getLastEdit(); 5777 if (lastEdit != null) { 5778 lastEdit.mFrozen = true; 5779 } 5780 mEditor.mUndoManager.endUpdate(); 5781 } 5782 5783 @Retention(RetentionPolicy.SOURCE) 5784 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5785 private @interface MergeMode {} 5786 private final static int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5787 private final static int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5788 /** Use {@link EditOperation#mergeWith} to merge */ 5789 private final static int MERGE_EDIT_MODE_NORMAL = 2; 5790 5791 private void handleEdit(CharSequence source, int start, int end, 5792 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5793 // An application may install a TextWatcher to provide additional modifications after 5794 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5795 // string). This results in multiple filter() calls for what the user considers to be 5796 // a single operation. Always undo the whole set of changes in one step. 5797 @MergeMode 5798 final int mergeMode; 5799 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5800 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5801 } else if (shouldCreateSeparateState) { 5802 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5803 } else { 5804 mergeMode = MERGE_EDIT_MODE_NORMAL; 5805 } 5806 // Build a new operation with all the information from this edit. 5807 String newText = TextUtils.substring(source, start, end); 5808 String oldText = TextUtils.substring(dest, dstart, dend); 5809 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5810 mHasComposition); 5811 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5812 return; 5813 } 5814 recordEdit(edit, mergeMode); 5815 } 5816 5817 private EditOperation getLastEdit() { 5818 final UndoManager um = mEditor.mUndoManager; 5819 return um.getLastOperation( 5820 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5821 } 5822 /** 5823 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5824 * If forceMerge is true then the new edit is always merged. 5825 */ 5826 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5827 // Fetch the last edit operation and attempt to merge in the new edit. 5828 final UndoManager um = mEditor.mUndoManager; 5829 um.beginUpdate("Edit text"); 5830 EditOperation lastEdit = getLastEdit(); 5831 if (lastEdit == null) { 5832 // Add this as the first edit. 5833 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5834 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5835 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5836 // Forced merges take priority because they could be the result of a non-user-edit 5837 // change and this case should not create a new undo operation. 5838 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5839 lastEdit.forceMergeWith(edit); 5840 } else if (!mIsUserEdit) { 5841 // An application directly modified the Editable outside of a text edit. Treat this 5842 // as a new change and don't attempt to merge. 5843 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5844 um.commitState(mEditor.mUndoOwner); 5845 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5846 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 5847 // Merge succeeded, nothing else to do. 5848 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5849 } else { 5850 // Could not merge with the last edit, so commit the last edit and add this edit. 5851 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5852 um.commitState(mEditor.mUndoOwner); 5853 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5854 } 5855 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 5856 um.endUpdate(); 5857 } 5858 5859 private boolean canUndoEdit(CharSequence source, int start, int end, 5860 Spanned dest, int dstart, int dend) { 5861 if (!mEditor.mAllowUndo) { 5862 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5863 return false; 5864 } 5865 5866 if (mEditor.mUndoManager.isInUndo()) { 5867 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5868 return false; 5869 } 5870 5871 // Text filters run before input operations are applied. However, some input operations 5872 // are invalid and will throw exceptions when applied. This is common in tests. Don't 5873 // attempt to undo invalid operations. 5874 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 5875 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 5876 return false; 5877 } 5878 5879 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 5880 // on an input field. Skip no-op changes. 5881 if (start == end && dstart == dend) { 5882 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 5883 return false; 5884 } 5885 5886 return true; 5887 } 5888 5889 private static boolean isComposition(CharSequence source) { 5890 if (!(source instanceof Spannable)) { 5891 return false; 5892 } 5893 // This is a composition edit if the source has a non-zero-length composing span. 5894 Spannable text = (Spannable) source; 5895 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 5896 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 5897 return composeBegin < composeEnd; 5898 } 5899 5900 private boolean isInTextWatcher() { 5901 CharSequence text = mEditor.mTextView.getText(); 5902 return (text instanceof SpannableStringBuilder) 5903 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 5904 } 5905 } 5906 5907 /** 5908 * An operation to undo a single "edit" to a text view. 5909 */ 5910 public static class EditOperation extends UndoOperation<Editor> { 5911 private static final int TYPE_INSERT = 0; 5912 private static final int TYPE_DELETE = 1; 5913 private static final int TYPE_REPLACE = 2; 5914 5915 private int mType; 5916 private String mOldText; 5917 private String mNewText; 5918 private int mStart; 5919 5920 private int mOldCursorPos; 5921 private int mNewCursorPos; 5922 private boolean mFrozen; 5923 private boolean mIsComposition; 5924 5925 /** 5926 * Constructs an edit operation from a text input operation on editor that replaces the 5927 * oldText starting at dstart with newText. 5928 */ 5929 public EditOperation(Editor editor, String oldText, int dstart, String newText, 5930 boolean isComposition) { 5931 super(editor.mUndoOwner); 5932 mOldText = oldText; 5933 mNewText = newText; 5934 5935 // Determine the type of the edit. 5936 if (mNewText.length() > 0 && mOldText.length() == 0) { 5937 mType = TYPE_INSERT; 5938 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 5939 mType = TYPE_DELETE; 5940 } else { 5941 mType = TYPE_REPLACE; 5942 } 5943 5944 mStart = dstart; 5945 // Store cursor data. 5946 mOldCursorPos = editor.mTextView.getSelectionStart(); 5947 mNewCursorPos = dstart + mNewText.length(); 5948 mIsComposition = isComposition; 5949 } 5950 5951 public EditOperation(Parcel src, ClassLoader loader) { 5952 super(src, loader); 5953 mType = src.readInt(); 5954 mOldText = src.readString(); 5955 mNewText = src.readString(); 5956 mStart = src.readInt(); 5957 mOldCursorPos = src.readInt(); 5958 mNewCursorPos = src.readInt(); 5959 mFrozen = src.readInt() == 1; 5960 mIsComposition = src.readInt() == 1; 5961 } 5962 5963 @Override 5964 public void writeToParcel(Parcel dest, int flags) { 5965 dest.writeInt(mType); 5966 dest.writeString(mOldText); 5967 dest.writeString(mNewText); 5968 dest.writeInt(mStart); 5969 dest.writeInt(mOldCursorPos); 5970 dest.writeInt(mNewCursorPos); 5971 dest.writeInt(mFrozen ? 1 : 0); 5972 dest.writeInt(mIsComposition ? 1 : 0); 5973 } 5974 5975 private int getNewTextEnd() { 5976 return mStart + mNewText.length(); 5977 } 5978 5979 private int getOldTextEnd() { 5980 return mStart + mOldText.length(); 5981 } 5982 5983 @Override 5984 public void commit() { 5985 } 5986 5987 @Override 5988 public void undo() { 5989 if (DEBUG_UNDO) Log.d(TAG, "undo"); 5990 // Remove the new text and insert the old. 5991 Editor editor = getOwnerData(); 5992 Editable text = (Editable) editor.mTextView.getText(); 5993 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 5994 } 5995 5996 @Override 5997 public void redo() { 5998 if (DEBUG_UNDO) Log.d(TAG, "redo"); 5999 // Remove the old text and insert the new. 6000 Editor editor = getOwnerData(); 6001 Editable text = (Editable) editor.mTextView.getText(); 6002 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6003 } 6004 6005 /** 6006 * Attempts to merge this existing operation with a new edit. 6007 * @param edit The new edit operation. 6008 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6009 * object unchanged. 6010 */ 6011 private boolean mergeWith(EditOperation edit) { 6012 if (DEBUG_UNDO) { 6013 Log.d(TAG, "mergeWith old " + this); 6014 Log.d(TAG, "mergeWith new " + edit); 6015 } 6016 6017 if (mFrozen) { 6018 return false; 6019 } 6020 6021 switch (mType) { 6022 case TYPE_INSERT: 6023 return mergeInsertWith(edit); 6024 case TYPE_DELETE: 6025 return mergeDeleteWith(edit); 6026 case TYPE_REPLACE: 6027 return mergeReplaceWith(edit); 6028 default: 6029 return false; 6030 } 6031 } 6032 6033 private boolean mergeInsertWith(EditOperation edit) { 6034 if (edit.mType == TYPE_INSERT) { 6035 // Merge insertions that are contiguous even when it's frozen. 6036 if (getNewTextEnd() != edit.mStart) { 6037 return false; 6038 } 6039 mNewText += edit.mNewText; 6040 mNewCursorPos = edit.mNewCursorPos; 6041 mFrozen = edit.mFrozen; 6042 mIsComposition = edit.mIsComposition; 6043 return true; 6044 } 6045 if (mIsComposition && edit.mType == TYPE_REPLACE && 6046 mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6047 // Merge insertion with replace as they can be single insertion. 6048 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6049 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6050 mNewCursorPos = edit.mNewCursorPos; 6051 mIsComposition = edit.mIsComposition; 6052 return true; 6053 } 6054 return false; 6055 } 6056 6057 // TODO: Support forward delete. 6058 private boolean mergeDeleteWith(EditOperation edit) { 6059 // Only merge continuous deletes. 6060 if (edit.mType != TYPE_DELETE) { 6061 return false; 6062 } 6063 // Only merge deletions that are contiguous. 6064 if (mStart != edit.getOldTextEnd()) { 6065 return false; 6066 } 6067 mStart = edit.mStart; 6068 mOldText = edit.mOldText + mOldText; 6069 mNewCursorPos = edit.mNewCursorPos; 6070 mIsComposition = edit.mIsComposition; 6071 return true; 6072 } 6073 6074 private boolean mergeReplaceWith(EditOperation edit) { 6075 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6076 // Merge with adjacent insert. 6077 mNewText += edit.mNewText; 6078 mNewCursorPos = edit.mNewCursorPos; 6079 return true; 6080 } 6081 if (!mIsComposition) { 6082 return false; 6083 } 6084 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6085 && getNewTextEnd() >= edit.getOldTextEnd()) { 6086 // Merge with delete as they can be single operation. 6087 mNewText = mNewText.substring(0, edit.mStart - mStart) 6088 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6089 if (mNewText.isEmpty()) { 6090 mType = TYPE_DELETE; 6091 } 6092 mNewCursorPos = edit.mNewCursorPos; 6093 mIsComposition = edit.mIsComposition; 6094 return true; 6095 } 6096 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6097 && TextUtils.equals(mNewText, edit.mOldText)) { 6098 // Merge with the replace that replaces the same region. 6099 mNewText = edit.mNewText; 6100 mNewCursorPos = edit.mNewCursorPos; 6101 mIsComposition = edit.mIsComposition; 6102 return true; 6103 } 6104 return false; 6105 } 6106 6107 /** 6108 * Forcibly creates a single merged edit operation by simulating the entire text 6109 * contents being replaced. 6110 */ 6111 public void forceMergeWith(EditOperation edit) { 6112 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6113 if (mergeWith(edit)) { 6114 return; 6115 } 6116 Editor editor = getOwnerData(); 6117 6118 // Copy the text of the current field. 6119 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6120 // but would require two parallel implementations of modifyText() because Editable and 6121 // StringBuilder do not share an interface for replace/delete/insert. 6122 Editable editable = (Editable) editor.mTextView.getText(); 6123 Editable originalText = new SpannableStringBuilder(editable.toString()); 6124 6125 // Roll back the last operation. 6126 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6127 6128 // Clone the text again and apply the new operation. 6129 Editable finalText = new SpannableStringBuilder(editable.toString()); 6130 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6131 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6132 6133 // Convert this operation into a replace operation. 6134 mType = TYPE_REPLACE; 6135 mNewText = finalText.toString(); 6136 mOldText = originalText.toString(); 6137 mStart = 0; 6138 mNewCursorPos = edit.mNewCursorPos; 6139 mIsComposition = edit.mIsComposition; 6140 // mOldCursorPos is unchanged. 6141 } 6142 6143 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6144 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6145 // Apply the edit if it is still valid. 6146 if (isValidRange(text, deleteFrom, deleteTo) && 6147 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6148 if (deleteFrom != deleteTo) { 6149 text.delete(deleteFrom, deleteTo); 6150 } 6151 if (newText.length() != 0) { 6152 text.insert(newTextInsertAt, newText); 6153 } 6154 } 6155 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6156 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6157 // TODO: Select all the text that was undone. 6158 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6159 Selection.setSelection(text, newCursorPos); 6160 } 6161 } 6162 6163 private String getTypeString() { 6164 switch (mType) { 6165 case TYPE_INSERT: 6166 return "insert"; 6167 case TYPE_DELETE: 6168 return "delete"; 6169 case TYPE_REPLACE: 6170 return "replace"; 6171 default: 6172 return ""; 6173 } 6174 } 6175 6176 @Override 6177 public String toString() { 6178 return "[mType=" + getTypeString() + ", " + 6179 "mOldText=" + mOldText + ", " + 6180 "mNewText=" + mNewText + ", " + 6181 "mStart=" + mStart + ", " + 6182 "mOldCursorPos=" + mOldCursorPos + ", " + 6183 "mNewCursorPos=" + mNewCursorPos + ", " + 6184 "mFrozen=" + mFrozen + ", " + 6185 "mIsComposition=" + mIsComposition + "]"; 6186 } 6187 6188 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 6189 = new Parcelable.ClassLoaderCreator<EditOperation>() { 6190 @Override 6191 public EditOperation createFromParcel(Parcel in) { 6192 return new EditOperation(in, null); 6193 } 6194 6195 @Override 6196 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6197 return new EditOperation(in, loader); 6198 } 6199 6200 @Override 6201 public EditOperation[] newArray(int size) { 6202 return new EditOperation[size]; 6203 } 6204 }; 6205 } 6206 6207 /** 6208 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6209 * These allow external applications to plug into currently selected text. 6210 */ 6211 static final class ProcessTextIntentActionsHandler { 6212 6213 private final Editor mEditor; 6214 private final TextView mTextView; 6215 private final Context mContext; 6216 private final PackageManager mPackageManager; 6217 private final String mPackageName; 6218 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6219 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions 6220 = new SparseArray<>(); 6221 private final List<ResolveInfo> supportedActivities = new ArrayList<>(); 6222 6223 private ProcessTextIntentActionsHandler(Editor editor) { 6224 mEditor = Preconditions.checkNotNull(editor); 6225 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6226 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6227 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6228 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6229 } 6230 6231 /** 6232 * Adds "PROCESS_TEXT" menu items to the specified menu. 6233 */ 6234 public void onInitializeMenu(Menu menu) { 6235 int i = 0; 6236 loadSupportedActivities(); 6237 for (ResolveInfo resolveInfo : supportedActivities) { 6238 menu.add(Menu.NONE, Menu.NONE, 6239 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6240 getLabel(resolveInfo)) 6241 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6242 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6243 } 6244 } 6245 6246 /** 6247 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6248 * menu item. 6249 * 6250 * @return True if the action was performed, false otherwise. 6251 */ 6252 public boolean performMenuItemAction(MenuItem item) { 6253 return fireIntent(item.getIntent()); 6254 } 6255 6256 /** 6257 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6258 */ 6259 public void initializeAccessibilityActions() { 6260 mAccessibilityIntents.clear(); 6261 mAccessibilityActions.clear(); 6262 int i = 0; 6263 loadSupportedActivities(); 6264 for (ResolveInfo resolveInfo : supportedActivities) { 6265 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6266 mAccessibilityActions.put( 6267 actionId, 6268 new AccessibilityNodeInfo.AccessibilityAction( 6269 actionId, getLabel(resolveInfo))); 6270 mAccessibilityIntents.put( 6271 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6272 } 6273 } 6274 6275 /** 6276 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6277 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6278 * latest accessibility actions available for this call. 6279 */ 6280 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6281 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6282 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6283 } 6284 } 6285 6286 /** 6287 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6288 * accessibility action id. 6289 * 6290 * @return True if the action was performed, false otherwise. 6291 */ 6292 public boolean performAccessibilityAction(int actionId) { 6293 return fireIntent(mAccessibilityIntents.get(actionId)); 6294 } 6295 6296 private boolean fireIntent(Intent intent) { 6297 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6298 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 6299 mEditor.mPreserveSelection = true; 6300 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6301 return true; 6302 } 6303 return false; 6304 } 6305 6306 private void loadSupportedActivities() { 6307 supportedActivities.clear(); 6308 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6309 List<ResolveInfo> unfiltered = packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6310 for (ResolveInfo info : unfiltered) { 6311 if (isSupportedActivity(info)) { 6312 supportedActivities.add(info); 6313 } 6314 } 6315 } 6316 6317 private boolean isSupportedActivity(ResolveInfo info) { 6318 return mPackageName.equals(info.activityInfo.packageName) 6319 || info.activityInfo.exported 6320 && (info.activityInfo.permission == null 6321 || mContext.checkSelfPermission(info.activityInfo.permission) 6322 == PackageManager.PERMISSION_GRANTED); 6323 } 6324 6325 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6326 return createProcessTextIntent() 6327 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6328 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6329 } 6330 6331 private Intent createProcessTextIntent() { 6332 return new Intent() 6333 .setAction(Intent.ACTION_PROCESS_TEXT) 6334 .setType("text/plain"); 6335 } 6336 6337 private CharSequence getLabel(ResolveInfo resolveInfo) { 6338 return resolveInfo.loadLabel(mPackageManager); 6339 } 6340 } 6341} 6342