Editor.java revision 7c263ddd582abacbbe9c71341a6ef4c704d12100
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.ArraySet; 74import android.util.DisplayMetrics; 75import android.util.Log; 76import android.util.SparseArray; 77import android.view.ActionMode; 78import android.view.ActionMode.Callback; 79import android.view.ContextMenu; 80import android.view.ContextThemeWrapper; 81import android.view.DisplayListCanvas; 82import android.view.DragAndDropPermissions; 83import android.view.DragEvent; 84import android.view.Gravity; 85import android.view.InputDevice; 86import android.view.LayoutInflater; 87import android.view.Menu; 88import android.view.MenuItem; 89import android.view.MotionEvent; 90import android.view.RenderNode; 91import android.view.SubMenu; 92import android.view.View; 93import android.view.View.DragShadowBuilder; 94import android.view.View.OnClickListener; 95import android.view.ViewConfiguration; 96import android.view.ViewGroup; 97import android.view.ViewGroup.LayoutParams; 98import android.view.ViewParent; 99import android.view.ViewTreeObserver; 100import android.view.WindowManager; 101import android.view.accessibility.AccessibilityNodeInfo; 102import android.view.inputmethod.CorrectionInfo; 103import android.view.inputmethod.CursorAnchorInfo; 104import android.view.inputmethod.EditorInfo; 105import android.view.inputmethod.ExtractedText; 106import android.view.inputmethod.ExtractedTextRequest; 107import android.view.inputmethod.InputConnection; 108import android.view.inputmethod.InputMethodManager; 109import android.widget.AdapterView.OnItemClickListener; 110import android.widget.TextView.Drawables; 111import android.widget.TextView.OnEditorActionListener; 112 113import com.android.internal.annotations.VisibleForTesting; 114import com.android.internal.util.ArrayUtils; 115import com.android.internal.util.GrowingArrayUtils; 116import com.android.internal.util.Preconditions; 117import com.android.internal.widget.EditableInputConnection; 118 119import java.lang.annotation.Retention; 120import java.lang.annotation.RetentionPolicy; 121import java.text.BreakIterator; 122import java.util.ArrayList; 123import java.util.Arrays; 124import java.util.Comparator; 125import java.util.HashMap; 126import java.util.List; 127 128 129/** 130 * Helper class used by TextView to handle editable text views. 131 * 132 * @hide 133 */ 134public class Editor { 135 private static final String TAG = "Editor"; 136 private static final boolean DEBUG_UNDO = false; 137 138 static final int BLINK = 500; 139 private static final float[] TEMP_POSITION = new float[2]; 140 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 141 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 142 private static final int UNSET_X_VALUE = -1; 143 private static final int UNSET_LINE = -1; 144 // Tag used when the Editor maintains its own separate UndoManager. 145 private static final String UNDO_OWNER_TAG = "Editor"; 146 147 // Ordering constants used to place the Action Mode or context menu items in their menu. 148 private static final int MENU_ITEM_ORDER_UNDO = 1; 149 private static final int MENU_ITEM_ORDER_REDO = 2; 150 private static final int MENU_ITEM_ORDER_CUT = 3; 151 private static final int MENU_ITEM_ORDER_COPY = 4; 152 private static final int MENU_ITEM_ORDER_PASTE = 5; 153 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 6; 154 private static final int MENU_ITEM_ORDER_SHARE = 7; 155 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 156 private static final int MENU_ITEM_ORDER_REPLACE = 9; 157 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 10; 158 159 // Each Editor manages its own undo stack. 160 private final UndoManager mUndoManager = new UndoManager(); 161 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 162 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 163 boolean mAllowUndo = true; 164 165 // Cursor Controllers. 166 private InsertionPointCursorController mInsertionPointCursorController; 167 SelectionModifierCursorController mSelectionModifierCursorController; 168 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 169 ActionMode mTextActionMode; 170 private boolean mInsertionControllerEnabled; 171 private boolean mSelectionControllerEnabled; 172 173 // Used to highlight a word when it is corrected by the IME 174 private CorrectionHighlighter mCorrectionHighlighter; 175 176 InputContentType mInputContentType; 177 InputMethodState mInputMethodState; 178 179 private static class TextRenderNode { 180 // Render node has 3 recording states: 181 // 1. Recorded operations are valid. 182 // #needsRecord() returns false, but needsToBeShifted is false. 183 // 2. Recorded operations are not valid, but just the position needed to be updated. 184 // #needsRecord() returns false, but needsToBeShifted is true. 185 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 186 // true. 187 RenderNode renderNode; 188 boolean isDirty; 189 // Becomes true when recorded operations can be reused, but the position has to be updated. 190 boolean needsToBeShifted; 191 public TextRenderNode(String name) { 192 renderNode = RenderNode.create(name, null); 193 isDirty = true; 194 needsToBeShifted = true; 195 } 196 boolean needsRecord() { 197 return isDirty || !renderNode.isValid(); 198 } 199 } 200 private TextRenderNode[] mTextRenderNodes; 201 202 boolean mFrozenWithFocus; 203 boolean mSelectionMoved; 204 boolean mTouchFocusSelected; 205 206 KeyListener mKeyListener; 207 int mInputType = EditorInfo.TYPE_NULL; 208 209 boolean mDiscardNextActionUp; 210 boolean mIgnoreActionUpEvent; 211 212 long mShowCursor; 213 private Blink mBlink; 214 215 boolean mCursorVisible = true; 216 boolean mSelectAllOnFocus; 217 boolean mTextIsSelectable; 218 219 CharSequence mError; 220 boolean mErrorWasChanged; 221 private ErrorPopup mErrorPopup; 222 223 /** 224 * This flag is set if the TextView tries to display an error before it 225 * is attached to the window (so its position is still unknown). 226 * It causes the error to be shown later, when onAttachedToWindow() 227 * is called. 228 */ 229 private boolean mShowErrorAfterAttach; 230 231 boolean mInBatchEditControllers; 232 boolean mShowSoftInputOnFocus = true; 233 private boolean mPreserveSelection; 234 private boolean mRestartActionModeOnNextRefresh; 235 236 boolean mIsBeingLongClicked; 237 238 private SuggestionsPopupWindow mSuggestionsPopupWindow; 239 SuggestionRangeSpan mSuggestionRangeSpan; 240 private Runnable mShowSuggestionRunnable; 241 242 final Drawable[] mCursorDrawable = new Drawable[2]; 243 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 244 245 private Drawable mSelectHandleLeft; 246 private Drawable mSelectHandleRight; 247 private Drawable mSelectHandleCenter; 248 249 // Global listener that detects changes in the global position of the TextView 250 private PositionListener mPositionListener; 251 252 private float mLastDownPositionX, mLastDownPositionY; 253 private float mContextMenuAnchorX, mContextMenuAnchorY; 254 Callback mCustomSelectionActionModeCallback; 255 Callback mCustomInsertionActionModeCallback; 256 257 // Set when this TextView gained focus with some text selected. Will start selection mode. 258 boolean mCreatedWithASelection; 259 260 // Indicates the current tap state (first tap, double tap, or triple click). 261 private int mTapState = TAP_STATE_INITIAL; 262 private long mLastTouchUpTime = 0; 263 private static final int TAP_STATE_INITIAL = 0; 264 private static final int TAP_STATE_FIRST_TAP = 1; 265 private static final int TAP_STATE_DOUBLE_TAP = 2; 266 // Only for mouse input. 267 private static final int TAP_STATE_TRIPLE_CLICK = 3; 268 269 // The button state as of the last time #onTouchEvent is called. 270 private int mLastButtonState; 271 272 private Runnable mInsertionActionModeRunnable; 273 274 // The span controller helps monitoring the changes to which the Editor needs to react: 275 // - EasyEditSpans, for which we have some UI to display on attach and on hide 276 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 277 private SpanController mSpanController; 278 279 private WordIterator mWordIterator; 280 SpellChecker mSpellChecker; 281 282 // This word iterator is set with text and used to determine word boundaries 283 // when a user is selecting text. 284 private WordIterator mWordIteratorWithText; 285 // Indicate that the text in the word iterator needs to be updated. 286 private boolean mUpdateWordIteratorText; 287 288 private Rect mTempRect; 289 290 private TextView mTextView; 291 292 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 293 294 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 295 new CursorAnchorInfoNotifier(); 296 297 private final Runnable mShowFloatingToolbar = new Runnable() { 298 @Override 299 public void run() { 300 if (mTextActionMode != null) { 301 mTextActionMode.hide(0); // hide off. 302 } 303 } 304 }; 305 306 boolean mIsInsertionActionModeStartPending = false; 307 308 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 309 310 Editor(TextView textView) { 311 mTextView = textView; 312 // Synchronize the filter list, which places the undo input filter at the end. 313 mTextView.setFilters(mTextView.getFilters()); 314 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 315 } 316 317 ParcelableParcel saveInstanceState() { 318 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 319 Parcel parcel = state.getParcel(); 320 mUndoManager.saveInstanceState(parcel); 321 mUndoInputFilter.saveInstanceState(parcel); 322 return state; 323 } 324 325 void restoreInstanceState(ParcelableParcel state) { 326 Parcel parcel = state.getParcel(); 327 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 328 mUndoInputFilter.restoreInstanceState(parcel); 329 // Re-associate this object as the owner of undo state. 330 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 331 } 332 333 /** 334 * Forgets all undo and redo operations for this Editor. 335 */ 336 void forgetUndoRedo() { 337 UndoOwner[] owners = { mUndoOwner }; 338 mUndoManager.forgetUndos(owners, -1 /* all */); 339 mUndoManager.forgetRedos(owners, -1 /* all */); 340 } 341 342 boolean canUndo() { 343 UndoOwner[] owners = { mUndoOwner }; 344 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 345 } 346 347 boolean canRedo() { 348 UndoOwner[] owners = { mUndoOwner }; 349 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 350 } 351 352 void undo() { 353 if (!mAllowUndo) { 354 return; 355 } 356 UndoOwner[] owners = { mUndoOwner }; 357 mUndoManager.undo(owners, 1); // Undo 1 action. 358 } 359 360 void redo() { 361 if (!mAllowUndo) { 362 return; 363 } 364 UndoOwner[] owners = { mUndoOwner }; 365 mUndoManager.redo(owners, 1); // Redo 1 action. 366 } 367 368 void replace() { 369 if (mSuggestionsPopupWindow == null) { 370 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 371 } 372 hideCursorAndSpanControllers(); 373 mSuggestionsPopupWindow.show(); 374 375 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 376 Selection.setSelection((Spannable) mTextView.getText(), middle); 377 } 378 379 void onAttachedToWindow() { 380 if (mShowErrorAfterAttach) { 381 showError(); 382 mShowErrorAfterAttach = false; 383 } 384 385 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 386 // No need to create the controller. 387 // The get method will add the listener on controller creation. 388 if (mInsertionPointCursorController != null) { 389 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 390 } 391 if (mSelectionModifierCursorController != null) { 392 mSelectionModifierCursorController.resetTouchOffsets(); 393 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 394 } 395 updateSpellCheckSpans(0, mTextView.getText().length(), 396 true /* create the spell checker if needed */); 397 398 if (mTextView.hasSelection()) { 399 refreshTextActionMode(); 400 } 401 402 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 403 resumeBlink(); 404 } 405 406 void onDetachedFromWindow() { 407 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 408 409 if (mError != null) { 410 hideError(); 411 } 412 413 suspendBlink(); 414 415 if (mInsertionPointCursorController != null) { 416 mInsertionPointCursorController.onDetached(); 417 } 418 419 if (mSelectionModifierCursorController != null) { 420 mSelectionModifierCursorController.onDetached(); 421 } 422 423 if (mShowSuggestionRunnable != null) { 424 mTextView.removeCallbacks(mShowSuggestionRunnable); 425 } 426 427 // Cancel the single tap delayed runnable. 428 if (mInsertionActionModeRunnable != null) { 429 mTextView.removeCallbacks(mInsertionActionModeRunnable); 430 } 431 432 mTextView.removeCallbacks(mShowFloatingToolbar); 433 434 discardTextDisplayLists(); 435 436 if (mSpellChecker != null) { 437 mSpellChecker.closeSession(); 438 // Forces the creation of a new SpellChecker next time this window is created. 439 // Will handle the cases where the settings has been changed in the meantime. 440 mSpellChecker = null; 441 } 442 443 hideCursorAndSpanControllers(); 444 stopTextActionModeWithPreservingSelection(); 445 } 446 447 private void discardTextDisplayLists() { 448 if (mTextRenderNodes != null) { 449 for (int i = 0; i < mTextRenderNodes.length; i++) { 450 RenderNode displayList = mTextRenderNodes[i] != null 451 ? mTextRenderNodes[i].renderNode : null; 452 if (displayList != null && displayList.isValid()) { 453 displayList.discardDisplayList(); 454 } 455 } 456 } 457 } 458 459 private void showError() { 460 if (mTextView.getWindowToken() == null) { 461 mShowErrorAfterAttach = true; 462 return; 463 } 464 465 if (mErrorPopup == null) { 466 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 467 final TextView err = (TextView) inflater.inflate( 468 com.android.internal.R.layout.textview_hint, null); 469 470 final float scale = mTextView.getResources().getDisplayMetrics().density; 471 mErrorPopup = 472 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 473 mErrorPopup.setFocusable(false); 474 // The user is entering text, so the input method is needed. We 475 // don't want the popup to be displayed on top of it. 476 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 477 } 478 479 TextView tv = (TextView) mErrorPopup.getContentView(); 480 chooseSize(mErrorPopup, mError, tv); 481 tv.setText(mError); 482 483 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 484 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 485 } 486 487 public void setError(CharSequence error, Drawable icon) { 488 mError = TextUtils.stringOrSpannedString(error); 489 mErrorWasChanged = true; 490 491 if (mError == null) { 492 setErrorIcon(null); 493 if (mErrorPopup != null) { 494 if (mErrorPopup.isShowing()) { 495 mErrorPopup.dismiss(); 496 } 497 498 mErrorPopup = null; 499 } 500 mShowErrorAfterAttach = false; 501 } else { 502 setErrorIcon(icon); 503 if (mTextView.isFocused()) { 504 showError(); 505 } 506 } 507 } 508 509 private void setErrorIcon(Drawable icon) { 510 Drawables dr = mTextView.mDrawables; 511 if (dr == null) { 512 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 513 } 514 dr.setErrorDrawable(icon, mTextView); 515 516 mTextView.resetResolvedDrawables(); 517 mTextView.invalidate(); 518 mTextView.requestLayout(); 519 } 520 521 private void hideError() { 522 if (mErrorPopup != null) { 523 if (mErrorPopup.isShowing()) { 524 mErrorPopup.dismiss(); 525 } 526 } 527 528 mShowErrorAfterAttach = false; 529 } 530 531 /** 532 * Returns the X offset to make the pointy top of the error point 533 * at the middle of the error icon. 534 */ 535 private int getErrorX() { 536 /* 537 * The "25" is the distance between the point and the right edge 538 * of the background 539 */ 540 final float scale = mTextView.getResources().getDisplayMetrics().density; 541 542 final Drawables dr = mTextView.mDrawables; 543 544 final int layoutDirection = mTextView.getLayoutDirection(); 545 int errorX; 546 int offset; 547 switch (layoutDirection) { 548 default: 549 case View.LAYOUT_DIRECTION_LTR: 550 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 551 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 552 - mTextView.getPaddingRight() + offset; 553 break; 554 case View.LAYOUT_DIRECTION_RTL: 555 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 556 errorX = mTextView.getPaddingLeft() + offset; 557 break; 558 } 559 return errorX; 560 } 561 562 /** 563 * Returns the Y offset to make the pointy top of the error point 564 * at the bottom of the error icon. 565 */ 566 private int getErrorY() { 567 /* 568 * Compound, not extended, because the icon is not clipped 569 * if the text height is smaller. 570 */ 571 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 572 int vspace = mTextView.getBottom() - mTextView.getTop() 573 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 574 575 final Drawables dr = mTextView.mDrawables; 576 577 final int layoutDirection = mTextView.getLayoutDirection(); 578 int height; 579 switch (layoutDirection) { 580 default: 581 case View.LAYOUT_DIRECTION_LTR: 582 height = (dr != null ? dr.mDrawableHeightRight : 0); 583 break; 584 case View.LAYOUT_DIRECTION_RTL: 585 height = (dr != null ? dr.mDrawableHeightLeft : 0); 586 break; 587 } 588 589 int icontop = compoundPaddingTop + (vspace - height) / 2; 590 591 /* 592 * The "2" is the distance between the point and the top edge 593 * of the background. 594 */ 595 final float scale = mTextView.getResources().getDisplayMetrics().density; 596 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 597 } 598 599 void createInputContentTypeIfNeeded() { 600 if (mInputContentType == null) { 601 mInputContentType = new InputContentType(); 602 } 603 } 604 605 void createInputMethodStateIfNeeded() { 606 if (mInputMethodState == null) { 607 mInputMethodState = new InputMethodState(); 608 } 609 } 610 611 boolean isCursorVisible() { 612 // The default value is true, even when there is no associated Editor 613 return mCursorVisible && mTextView.isTextEditable(); 614 } 615 616 void prepareCursorControllers() { 617 boolean windowSupportsHandles = false; 618 619 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 620 if (params instanceof WindowManager.LayoutParams) { 621 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 622 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 623 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 624 } 625 626 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 627 mInsertionControllerEnabled = enabled && isCursorVisible(); 628 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 629 630 if (!mInsertionControllerEnabled) { 631 hideInsertionPointCursorController(); 632 if (mInsertionPointCursorController != null) { 633 mInsertionPointCursorController.onDetached(); 634 mInsertionPointCursorController = null; 635 } 636 } 637 638 if (!mSelectionControllerEnabled) { 639 stopTextActionMode(); 640 if (mSelectionModifierCursorController != null) { 641 mSelectionModifierCursorController.onDetached(); 642 mSelectionModifierCursorController = null; 643 } 644 } 645 } 646 647 void hideInsertionPointCursorController() { 648 if (mInsertionPointCursorController != null) { 649 mInsertionPointCursorController.hide(); 650 } 651 } 652 653 /** 654 * Hides the insertion and span controllers. 655 */ 656 void hideCursorAndSpanControllers() { 657 hideCursorControllers(); 658 hideSpanControllers(); 659 } 660 661 private void hideSpanControllers() { 662 if (mSpanController != null) { 663 mSpanController.hide(); 664 } 665 } 666 667 private void hideCursorControllers() { 668 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 669 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 670 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 671 // to distinguish one from the other. 672 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 673 || !mSuggestionsPopupWindow.isShowingUp())) { 674 // Should be done before hide insertion point controller since it triggers a show of it 675 mSuggestionsPopupWindow.hide(); 676 } 677 hideInsertionPointCursorController(); 678 } 679 680 /** 681 * Create new SpellCheckSpans on the modified region. 682 */ 683 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 684 // Remove spans whose adjacent characters are text not punctuation 685 mTextView.removeAdjacentSuggestionSpans(start); 686 mTextView.removeAdjacentSuggestionSpans(end); 687 688 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 689 && !(mTextView.isInExtractedMode())) { 690 if (mSpellChecker == null && createSpellChecker) { 691 mSpellChecker = new SpellChecker(mTextView); 692 } 693 if (mSpellChecker != null) { 694 mSpellChecker.spellCheck(start, end); 695 } 696 } 697 } 698 699 void onScreenStateChanged(int screenState) { 700 switch (screenState) { 701 case View.SCREEN_STATE_ON: 702 resumeBlink(); 703 break; 704 case View.SCREEN_STATE_OFF: 705 suspendBlink(); 706 break; 707 } 708 } 709 710 private void suspendBlink() { 711 if (mBlink != null) { 712 mBlink.cancel(); 713 } 714 } 715 716 private void resumeBlink() { 717 if (mBlink != null) { 718 mBlink.uncancel(); 719 makeBlink(); 720 } 721 } 722 723 void adjustInputType(boolean password, boolean passwordInputType, 724 boolean webPasswordInputType, boolean numberPasswordInputType) { 725 // mInputType has been set from inputType, possibly modified by mInputMethod. 726 // Specialize mInputType to [web]password if we have a text class and the original input 727 // type was a password. 728 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 729 if (password || passwordInputType) { 730 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 731 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 732 } 733 if (webPasswordInputType) { 734 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 735 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 736 } 737 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 738 if (numberPasswordInputType) { 739 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 740 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 741 } 742 } 743 } 744 745 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 746 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 747 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 748 749 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 750 com.android.internal.R.dimen.textview_error_popup_default_width); 751 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 752 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 753 float max = 0; 754 for (int i = 0; i < l.getLineCount(); i++) { 755 max = Math.max(max, l.getLineWidth(i)); 756 } 757 758 /* 759 * Now set the popup size to be big enough for the text plus the border capped 760 * to DEFAULT_MAX_POPUP_WIDTH 761 */ 762 pop.setWidth(wid + (int) Math.ceil(max)); 763 pop.setHeight(ht + l.getHeight()); 764 } 765 766 void setFrame() { 767 if (mErrorPopup != null) { 768 TextView tv = (TextView) mErrorPopup.getContentView(); 769 chooseSize(mErrorPopup, mError, tv); 770 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 771 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 772 } 773 } 774 775 private int getWordStart(int offset) { 776 // FIXME - For this and similar methods we're not doing anything to check if there's 777 // a LocaleSpan in the text, this may be something we should try handling or checking for. 778 int retOffset = getWordIteratorWithText().prevBoundary(offset); 779 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 780 // On punctuation boundary or within group of punctuation, find punctuation start. 781 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 782 } else { 783 // Not on a punctuation boundary, find the word start. 784 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 785 } 786 if (retOffset == BreakIterator.DONE) { 787 return offset; 788 } 789 return retOffset; 790 } 791 792 private int getWordEnd(int offset) { 793 int retOffset = getWordIteratorWithText().nextBoundary(offset); 794 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 795 // On punctuation boundary or within group of punctuation, find punctuation end. 796 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 797 } else { 798 // Not on a punctuation boundary, find the word end. 799 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 800 } 801 if (retOffset == BreakIterator.DONE) { 802 return offset; 803 } 804 return retOffset; 805 } 806 807 private boolean needsToSelectAllToSelectWordOrParagraph() { 808 if (mTextView.hasPasswordTransformationMethod()) { 809 // Always select all on a password field. 810 // Cut/copy menu entries are not available for passwords, but being able to select all 811 // is however useful to delete or paste to replace the entire content. 812 return true; 813 } 814 815 int inputType = mTextView.getInputType(); 816 int klass = inputType & InputType.TYPE_MASK_CLASS; 817 int variation = inputType & InputType.TYPE_MASK_VARIATION; 818 819 // Specific text field types: select the entire text for these 820 if (klass == InputType.TYPE_CLASS_NUMBER 821 || klass == InputType.TYPE_CLASS_PHONE 822 || klass == InputType.TYPE_CLASS_DATETIME 823 || variation == InputType.TYPE_TEXT_VARIATION_URI 824 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 825 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 826 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 827 return true; 828 } 829 return false; 830 } 831 832 /** 833 * Adjusts selection to the word under last touch offset. Return true if the operation was 834 * successfully performed. 835 */ 836 private boolean selectCurrentWord() { 837 if (!mTextView.canSelectText()) { 838 return false; 839 } 840 841 if (needsToSelectAllToSelectWordOrParagraph()) { 842 return mTextView.selectAllText(); 843 } 844 845 long lastTouchOffsets = getLastTouchOffsets(); 846 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 847 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 848 849 // Safety check in case standard touch event handling has been bypassed 850 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 851 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 852 853 int selectionStart, selectionEnd; 854 855 // If a URLSpan (web address, email, phone...) is found at that position, select it. 856 URLSpan[] urlSpans = 857 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 858 if (urlSpans.length >= 1) { 859 URLSpan urlSpan = urlSpans[0]; 860 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 861 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 862 } else { 863 // FIXME - We should check if there's a LocaleSpan in the text, this may be 864 // something we should try handling or checking for. 865 final WordIterator wordIterator = getWordIterator(); 866 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 867 868 selectionStart = wordIterator.getBeginning(minOffset); 869 selectionEnd = wordIterator.getEnd(maxOffset); 870 871 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 872 || selectionStart == selectionEnd) { 873 // Possible when the word iterator does not properly handle the text's language 874 long range = getCharClusterRange(minOffset); 875 selectionStart = TextUtils.unpackRangeStartFromLong(range); 876 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 877 } 878 } 879 880 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 881 return selectionEnd > selectionStart; 882 } 883 884 /** 885 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 886 * successfully performed. 887 */ 888 private boolean selectCurrentParagraph() { 889 if (!mTextView.canSelectText()) { 890 return false; 891 } 892 893 if (needsToSelectAllToSelectWordOrParagraph()) { 894 return mTextView.selectAllText(); 895 } 896 897 long lastTouchOffsets = getLastTouchOffsets(); 898 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 899 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 900 901 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 902 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 903 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 904 if (start < end) { 905 Selection.setSelection((Spannable) mTextView.getText(), start, end); 906 return true; 907 } 908 return false; 909 } 910 911 /** 912 * Get the minimum range of paragraphs that contains startOffset and endOffset. 913 */ 914 private long getParagraphsRange(int startOffset, int endOffset) { 915 final Layout layout = mTextView.getLayout(); 916 if (layout == null) { 917 return TextUtils.packRangeInLong(-1, -1); 918 } 919 final CharSequence text = mTextView.getText(); 920 int minLine = layout.getLineForOffset(startOffset); 921 // Search paragraph start. 922 while (minLine > 0) { 923 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 924 if (text.charAt(prevLineEndOffset - 1) == '\n') { 925 break; 926 } 927 minLine--; 928 } 929 int maxLine = layout.getLineForOffset(endOffset); 930 // Search paragraph end. 931 while (maxLine < layout.getLineCount() - 1) { 932 final int lineEndOffset = layout.getLineEnd(maxLine); 933 if (text.charAt(lineEndOffset - 1) == '\n') { 934 break; 935 } 936 maxLine++; 937 } 938 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 939 } 940 941 void onLocaleChanged() { 942 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 943 // proper new locale 944 mWordIterator = null; 945 mWordIteratorWithText = null; 946 } 947 948 public WordIterator getWordIterator() { 949 if (mWordIterator == null) { 950 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 951 } 952 return mWordIterator; 953 } 954 955 private WordIterator getWordIteratorWithText() { 956 if (mWordIteratorWithText == null) { 957 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 958 mUpdateWordIteratorText = true; 959 } 960 if (mUpdateWordIteratorText) { 961 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 962 // to the user's selection is needed. A possible solution would be to 963 // copy some number N of characters near the selection and then when the 964 // user approaches N then we'd do another copy of the next N characters. 965 CharSequence text = mTextView.getText(); 966 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 967 mUpdateWordIteratorText = false; 968 } 969 return mWordIteratorWithText; 970 } 971 972 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 973 final Layout layout = mTextView.getLayout(); 974 if (layout == null) return offset; 975 return findAfterGivenOffset == layout.isRtlCharAt(offset) 976 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 977 } 978 979 private long getCharClusterRange(int offset) { 980 final int textLength = mTextView.getText().length(); 981 if (offset < textLength) { 982 final int clusterEndOffset = getNextCursorOffset(offset, true); 983 return TextUtils.packRangeInLong( 984 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 985 } 986 if (offset - 1 >= 0) { 987 final int clusterStartOffset = getNextCursorOffset(offset, false); 988 return TextUtils.packRangeInLong(clusterStartOffset, 989 getNextCursorOffset(clusterStartOffset, true)); 990 } 991 return TextUtils.packRangeInLong(offset, offset); 992 } 993 994 private boolean touchPositionIsInSelection() { 995 int selectionStart = mTextView.getSelectionStart(); 996 int selectionEnd = mTextView.getSelectionEnd(); 997 998 if (selectionStart == selectionEnd) { 999 return false; 1000 } 1001 1002 if (selectionStart > selectionEnd) { 1003 int tmp = selectionStart; 1004 selectionStart = selectionEnd; 1005 selectionEnd = tmp; 1006 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1007 } 1008 1009 SelectionModifierCursorController selectionController = getSelectionController(); 1010 int minOffset = selectionController.getMinTouchOffset(); 1011 int maxOffset = selectionController.getMaxTouchOffset(); 1012 1013 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1014 } 1015 1016 private PositionListener getPositionListener() { 1017 if (mPositionListener == null) { 1018 mPositionListener = new PositionListener(); 1019 } 1020 return mPositionListener; 1021 } 1022 1023 private interface TextViewPositionListener { 1024 public void updatePosition(int parentPositionX, int parentPositionY, 1025 boolean parentPositionChanged, boolean parentScrolled); 1026 } 1027 1028 private boolean isPositionVisible(final float positionX, final float positionY) { 1029 synchronized (TEMP_POSITION) { 1030 final float[] position = TEMP_POSITION; 1031 position[0] = positionX; 1032 position[1] = positionY; 1033 View view = mTextView; 1034 1035 while (view != null) { 1036 if (view != mTextView) { 1037 // Local scroll is already taken into account in positionX/Y 1038 position[0] -= view.getScrollX(); 1039 position[1] -= view.getScrollY(); 1040 } 1041 1042 if (position[0] < 0 || position[1] < 0 || position[0] > view.getWidth() 1043 || position[1] > view.getHeight()) { 1044 return false; 1045 } 1046 1047 if (!view.getMatrix().isIdentity()) { 1048 view.getMatrix().mapPoints(position); 1049 } 1050 1051 position[0] += view.getLeft(); 1052 position[1] += view.getTop(); 1053 1054 final ViewParent parent = view.getParent(); 1055 if (parent instanceof View) { 1056 view = (View) parent; 1057 } else { 1058 // We've reached the ViewRoot, stop iterating 1059 view = null; 1060 } 1061 } 1062 } 1063 1064 // We've been able to walk up the view hierarchy and the position was never clipped 1065 return true; 1066 } 1067 1068 private boolean isOffsetVisible(int offset) { 1069 Layout layout = mTextView.getLayout(); 1070 if (layout == null) return false; 1071 1072 final int line = layout.getLineForOffset(offset); 1073 final int lineBottom = layout.getLineBottom(line); 1074 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1075 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1076 lineBottom + mTextView.viewportToContentVerticalOffset()); 1077 } 1078 1079 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1080 * in the view. Returns false when the position is in the empty space of left/right of text. 1081 */ 1082 private boolean isPositionOnText(float x, float y) { 1083 Layout layout = mTextView.getLayout(); 1084 if (layout == null) return false; 1085 1086 final int line = mTextView.getLineAtCoordinate(y); 1087 x = mTextView.convertToLocalHorizontalCoordinate(x); 1088 1089 if (x < layout.getLineLeft(line)) return false; 1090 if (x > layout.getLineRight(line)) return false; 1091 return true; 1092 } 1093 1094 private void startDragAndDrop() { 1095 // TODO: Fix drag and drop in full screen extracted mode. 1096 if (mTextView.isInExtractedMode()) { 1097 return; 1098 } 1099 final int start = mTextView.getSelectionStart(); 1100 final int end = mTextView.getSelectionEnd(); 1101 CharSequence selectedText = mTextView.getTransformedText(start, end); 1102 ClipData data = ClipData.newPlainText(null, selectedText); 1103 DragLocalState localState = new DragLocalState(mTextView, start, end); 1104 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1105 View.DRAG_FLAG_GLOBAL); 1106 stopTextActionMode(); 1107 if (hasSelectionController()) { 1108 getSelectionController().resetTouchOffsets(); 1109 } 1110 } 1111 1112 public boolean performLongClick(boolean handled) { 1113 // Long press in empty space moves cursor and starts the insertion action mode. 1114 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1115 && mInsertionControllerEnabled) { 1116 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1117 mLastDownPositionY); 1118 Selection.setSelection((Spannable) mTextView.getText(), offset); 1119 getInsertionController().show(); 1120 mIsInsertionActionModeStartPending = true; 1121 handled = true; 1122 } 1123 1124 if (!handled && mTextActionMode != null) { 1125 if (touchPositionIsInSelection()) { 1126 startDragAndDrop(); 1127 } else { 1128 stopTextActionMode(); 1129 selectCurrentWordAndStartDrag(); 1130 } 1131 handled = true; 1132 } 1133 1134 // Start a new selection 1135 if (!handled) { 1136 handled = selectCurrentWordAndStartDrag(); 1137 } 1138 1139 return handled; 1140 } 1141 1142 private long getLastTouchOffsets() { 1143 SelectionModifierCursorController selectionController = getSelectionController(); 1144 final int minOffset = selectionController.getMinTouchOffset(); 1145 final int maxOffset = selectionController.getMaxTouchOffset(); 1146 return TextUtils.packRangeInLong(minOffset, maxOffset); 1147 } 1148 1149 void onFocusChanged(boolean focused, int direction) { 1150 mShowCursor = SystemClock.uptimeMillis(); 1151 ensureEndedBatchEdit(); 1152 1153 if (focused) { 1154 int selStart = mTextView.getSelectionStart(); 1155 int selEnd = mTextView.getSelectionEnd(); 1156 1157 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1158 // mode for these, unless there was a specific selection already started. 1159 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1160 && selEnd == mTextView.getText().length(); 1161 1162 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1163 && !isFocusHighlighted; 1164 1165 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1166 // If a tap was used to give focus to that view, move cursor at tap position. 1167 // Has to be done before onTakeFocus, which can be overloaded. 1168 final int lastTapPosition = getLastTapPosition(); 1169 if (lastTapPosition >= 0) { 1170 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1171 } 1172 1173 // Note this may have to be moved out of the Editor class 1174 MovementMethod mMovement = mTextView.getMovementMethod(); 1175 if (mMovement != null) { 1176 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1177 } 1178 1179 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1180 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1181 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1182 // This special case ensure that we keep current selection in that case. 1183 // It would be better to know why the DecorView does not have focus at that time. 1184 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1185 && selStart >= 0 && selEnd >= 0) { 1186 /* 1187 * Someone intentionally set the selection, so let them 1188 * do whatever it is that they wanted to do instead of 1189 * the default on-focus behavior. We reset the selection 1190 * here instead of just skipping the onTakeFocus() call 1191 * because some movement methods do something other than 1192 * just setting the selection in theirs and we still 1193 * need to go through that path. 1194 */ 1195 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1196 } 1197 1198 if (mSelectAllOnFocus) { 1199 mTextView.selectAllText(); 1200 } 1201 1202 mTouchFocusSelected = true; 1203 } 1204 1205 mFrozenWithFocus = false; 1206 mSelectionMoved = false; 1207 1208 if (mError != null) { 1209 showError(); 1210 } 1211 1212 makeBlink(); 1213 } else { 1214 if (mError != null) { 1215 hideError(); 1216 } 1217 // Don't leave us in the middle of a batch edit. 1218 mTextView.onEndBatchEdit(); 1219 1220 if (mTextView.isInExtractedMode()) { 1221 hideCursorAndSpanControllers(); 1222 stopTextActionModeWithPreservingSelection(); 1223 } else { 1224 hideCursorAndSpanControllers(); 1225 if (mTextView.isTemporarilyDetached()) { 1226 stopTextActionModeWithPreservingSelection(); 1227 } else { 1228 stopTextActionMode(); 1229 } 1230 downgradeEasyCorrectionSpans(); 1231 } 1232 // No need to create the controller 1233 if (mSelectionModifierCursorController != null) { 1234 mSelectionModifierCursorController.resetTouchOffsets(); 1235 } 1236 } 1237 } 1238 1239 /** 1240 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1241 * span. 1242 */ 1243 private void downgradeEasyCorrectionSpans() { 1244 CharSequence text = mTextView.getText(); 1245 if (text instanceof Spannable) { 1246 Spannable spannable = (Spannable) text; 1247 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1248 spannable.length(), SuggestionSpan.class); 1249 for (int i = 0; i < suggestionSpans.length; i++) { 1250 int flags = suggestionSpans[i].getFlags(); 1251 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1252 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1253 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1254 suggestionSpans[i].setFlags(flags); 1255 } 1256 } 1257 } 1258 } 1259 1260 void sendOnTextChanged(int start, int after) { 1261 updateSpellCheckSpans(start, start + after, false); 1262 1263 // Flip flag to indicate the word iterator needs to have the text reset. 1264 mUpdateWordIteratorText = true; 1265 1266 // Hide the controllers as soon as text is modified (typing, procedural...) 1267 // We do not hide the span controllers, since they can be added when a new text is 1268 // inserted into the text view (voice IME). 1269 hideCursorControllers(); 1270 // Reset drag accelerator. 1271 if (mSelectionModifierCursorController != null) { 1272 mSelectionModifierCursorController.resetTouchOffsets(); 1273 } 1274 stopTextActionMode(); 1275 } 1276 1277 private int getLastTapPosition() { 1278 // No need to create the controller at that point, no last tap position saved 1279 if (mSelectionModifierCursorController != null) { 1280 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1281 if (lastTapPosition >= 0) { 1282 // Safety check, should not be possible. 1283 if (lastTapPosition > mTextView.getText().length()) { 1284 lastTapPosition = mTextView.getText().length(); 1285 } 1286 return lastTapPosition; 1287 } 1288 } 1289 1290 return -1; 1291 } 1292 1293 void onWindowFocusChanged(boolean hasWindowFocus) { 1294 if (hasWindowFocus) { 1295 if (mBlink != null) { 1296 mBlink.uncancel(); 1297 makeBlink(); 1298 } 1299 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1300 refreshTextActionMode(); 1301 } 1302 } else { 1303 if (mBlink != null) { 1304 mBlink.cancel(); 1305 } 1306 if (mInputContentType != null) { 1307 mInputContentType.enterDown = false; 1308 } 1309 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1310 hideCursorAndSpanControllers(); 1311 stopTextActionModeWithPreservingSelection(); 1312 if (mSuggestionsPopupWindow != null) { 1313 mSuggestionsPopupWindow.onParentLostFocus(); 1314 } 1315 1316 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1317 ensureEndedBatchEdit(); 1318 } 1319 } 1320 1321 private void updateTapState(MotionEvent event) { 1322 final int action = event.getActionMasked(); 1323 if (action == MotionEvent.ACTION_DOWN) { 1324 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1325 // Detect double tap and triple click. 1326 if (((mTapState == TAP_STATE_FIRST_TAP) 1327 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1328 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1329 <= ViewConfiguration.getDoubleTapTimeout()) { 1330 if (mTapState == TAP_STATE_FIRST_TAP) { 1331 mTapState = TAP_STATE_DOUBLE_TAP; 1332 } else { 1333 mTapState = TAP_STATE_TRIPLE_CLICK; 1334 } 1335 } else { 1336 mTapState = TAP_STATE_FIRST_TAP; 1337 } 1338 } 1339 if (action == MotionEvent.ACTION_UP) { 1340 mLastTouchUpTime = SystemClock.uptimeMillis(); 1341 } 1342 } 1343 1344 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1345 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1346 return false; 1347 } 1348 final boolean primaryButtonStateChanged = 1349 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1350 final int action = event.getActionMasked(); 1351 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1352 && !primaryButtonStateChanged) { 1353 return true; 1354 } 1355 if (action == MotionEvent.ACTION_MOVE 1356 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1357 return true; 1358 } 1359 return false; 1360 } 1361 1362 void onTouchEvent(MotionEvent event) { 1363 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1364 mLastButtonState = event.getButtonState(); 1365 if (filterOutEvent) { 1366 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1367 mDiscardNextActionUp = true; 1368 } 1369 return; 1370 } 1371 updateTapState(event); 1372 updateFloatingToolbarVisibility(event); 1373 1374 if (hasSelectionController()) { 1375 getSelectionController().onTouchEvent(event); 1376 } 1377 1378 if (mShowSuggestionRunnable != null) { 1379 mTextView.removeCallbacks(mShowSuggestionRunnable); 1380 mShowSuggestionRunnable = null; 1381 } 1382 1383 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1384 mLastDownPositionX = event.getX(); 1385 mLastDownPositionY = event.getY(); 1386 1387 // Reset this state; it will be re-set if super.onTouchEvent 1388 // causes focus to move to the view. 1389 mTouchFocusSelected = false; 1390 mIgnoreActionUpEvent = false; 1391 } 1392 } 1393 1394 private void updateFloatingToolbarVisibility(MotionEvent event) { 1395 if (mTextActionMode != null) { 1396 switch (event.getActionMasked()) { 1397 case MotionEvent.ACTION_MOVE: 1398 hideFloatingToolbar(); 1399 break; 1400 case MotionEvent.ACTION_UP: // fall through 1401 case MotionEvent.ACTION_CANCEL: 1402 showFloatingToolbar(); 1403 } 1404 } 1405 } 1406 1407 private void hideFloatingToolbar() { 1408 if (mTextActionMode != null) { 1409 mTextView.removeCallbacks(mShowFloatingToolbar); 1410 mTextActionMode.hide(ActionMode.DEFAULT_HIDE_DURATION); 1411 } 1412 } 1413 1414 private void showFloatingToolbar() { 1415 if (mTextActionMode != null) { 1416 // Delay "show" so it doesn't interfere with click confirmations 1417 // or double-clicks that could "dismiss" the floating toolbar. 1418 int delay = ViewConfiguration.getDoubleTapTimeout(); 1419 mTextView.postDelayed(mShowFloatingToolbar, delay); 1420 } 1421 } 1422 1423 public void beginBatchEdit() { 1424 mInBatchEditControllers = true; 1425 final InputMethodState ims = mInputMethodState; 1426 if (ims != null) { 1427 int nesting = ++ims.mBatchEditNesting; 1428 if (nesting == 1) { 1429 ims.mCursorChanged = false; 1430 ims.mChangedDelta = 0; 1431 if (ims.mContentChanged) { 1432 // We already have a pending change from somewhere else, 1433 // so turn this into a full update. 1434 ims.mChangedStart = 0; 1435 ims.mChangedEnd = mTextView.getText().length(); 1436 } else { 1437 ims.mChangedStart = EXTRACT_UNKNOWN; 1438 ims.mChangedEnd = EXTRACT_UNKNOWN; 1439 ims.mContentChanged = false; 1440 } 1441 mUndoInputFilter.beginBatchEdit(); 1442 mTextView.onBeginBatchEdit(); 1443 } 1444 } 1445 } 1446 1447 public void endBatchEdit() { 1448 mInBatchEditControllers = false; 1449 final InputMethodState ims = mInputMethodState; 1450 if (ims != null) { 1451 int nesting = --ims.mBatchEditNesting; 1452 if (nesting == 0) { 1453 finishBatchEdit(ims); 1454 } 1455 } 1456 } 1457 1458 void ensureEndedBatchEdit() { 1459 final InputMethodState ims = mInputMethodState; 1460 if (ims != null && ims.mBatchEditNesting != 0) { 1461 ims.mBatchEditNesting = 0; 1462 finishBatchEdit(ims); 1463 } 1464 } 1465 1466 void finishBatchEdit(final InputMethodState ims) { 1467 mTextView.onEndBatchEdit(); 1468 mUndoInputFilter.endBatchEdit(); 1469 1470 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1471 mTextView.updateAfterEdit(); 1472 reportExtractedText(); 1473 } else if (ims.mCursorChanged) { 1474 // Cheesy way to get us to report the current cursor location. 1475 mTextView.invalidateCursor(); 1476 } 1477 // sendUpdateSelection knows to avoid sending if the selection did 1478 // not actually change. 1479 sendUpdateSelection(); 1480 1481 // Show drag handles if they were blocked by batch edit mode. 1482 if (mTextActionMode != null) { 1483 final CursorController cursorController = mTextView.hasSelection() 1484 ? getSelectionController() : getInsertionController(); 1485 if (cursorController != null && !cursorController.isActive() 1486 && !cursorController.isCursorBeingModified()) { 1487 cursorController.show(); 1488 } 1489 } 1490 } 1491 1492 static final int EXTRACT_NOTHING = -2; 1493 static final int EXTRACT_UNKNOWN = -1; 1494 1495 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1496 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1497 EXTRACT_UNKNOWN, outText); 1498 } 1499 1500 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1501 int partialStartOffset, int partialEndOffset, int delta, 1502 @Nullable ExtractedText outText) { 1503 if (request == null || outText == null) { 1504 return false; 1505 } 1506 1507 final CharSequence content = mTextView.getText(); 1508 if (content == null) { 1509 return false; 1510 } 1511 1512 if (partialStartOffset != EXTRACT_NOTHING) { 1513 final int N = content.length(); 1514 if (partialStartOffset < 0) { 1515 outText.partialStartOffset = outText.partialEndOffset = -1; 1516 partialStartOffset = 0; 1517 partialEndOffset = N; 1518 } else { 1519 // Now use the delta to determine the actual amount of text 1520 // we need. 1521 partialEndOffset += delta; 1522 // Adjust offsets to ensure we contain full spans. 1523 if (content instanceof Spanned) { 1524 Spanned spanned = (Spanned) content; 1525 Object[] spans = spanned.getSpans(partialStartOffset, 1526 partialEndOffset, ParcelableSpan.class); 1527 int i = spans.length; 1528 while (i > 0) { 1529 i--; 1530 int j = spanned.getSpanStart(spans[i]); 1531 if (j < partialStartOffset) partialStartOffset = j; 1532 j = spanned.getSpanEnd(spans[i]); 1533 if (j > partialEndOffset) partialEndOffset = j; 1534 } 1535 } 1536 outText.partialStartOffset = partialStartOffset; 1537 outText.partialEndOffset = partialEndOffset - delta; 1538 1539 if (partialStartOffset > N) { 1540 partialStartOffset = N; 1541 } else if (partialStartOffset < 0) { 1542 partialStartOffset = 0; 1543 } 1544 if (partialEndOffset > N) { 1545 partialEndOffset = N; 1546 } else if (partialEndOffset < 0) { 1547 partialEndOffset = 0; 1548 } 1549 } 1550 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1551 outText.text = content.subSequence(partialStartOffset, 1552 partialEndOffset); 1553 } else { 1554 outText.text = TextUtils.substring(content, partialStartOffset, 1555 partialEndOffset); 1556 } 1557 } else { 1558 outText.partialStartOffset = 0; 1559 outText.partialEndOffset = 0; 1560 outText.text = ""; 1561 } 1562 outText.flags = 0; 1563 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1564 outText.flags |= ExtractedText.FLAG_SELECTING; 1565 } 1566 if (mTextView.isSingleLine()) { 1567 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1568 } 1569 outText.startOffset = 0; 1570 outText.selectionStart = mTextView.getSelectionStart(); 1571 outText.selectionEnd = mTextView.getSelectionEnd(); 1572 return true; 1573 } 1574 1575 boolean reportExtractedText() { 1576 final Editor.InputMethodState ims = mInputMethodState; 1577 if (ims != null) { 1578 final boolean contentChanged = ims.mContentChanged; 1579 if (contentChanged || ims.mSelectionModeChanged) { 1580 ims.mContentChanged = false; 1581 ims.mSelectionModeChanged = false; 1582 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1583 if (req != null) { 1584 InputMethodManager imm = InputMethodManager.peekInstance(); 1585 if (imm != null) { 1586 if (TextView.DEBUG_EXTRACT) { 1587 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1588 + ims.mChangedStart 1589 + " end=" + ims.mChangedEnd 1590 + " delta=" + ims.mChangedDelta); 1591 } 1592 if (ims.mChangedStart < 0 && !contentChanged) { 1593 ims.mChangedStart = EXTRACT_NOTHING; 1594 } 1595 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1596 ims.mChangedDelta, ims.mExtractedText)) { 1597 if (TextView.DEBUG_EXTRACT) { 1598 Log.v(TextView.LOG_TAG, 1599 "Reporting extracted start=" 1600 + ims.mExtractedText.partialStartOffset 1601 + " end=" + ims.mExtractedText.partialEndOffset 1602 + ": " + ims.mExtractedText.text); 1603 } 1604 1605 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1606 ims.mChangedStart = EXTRACT_UNKNOWN; 1607 ims.mChangedEnd = EXTRACT_UNKNOWN; 1608 ims.mChangedDelta = 0; 1609 ims.mContentChanged = false; 1610 return true; 1611 } 1612 } 1613 } 1614 } 1615 } 1616 return false; 1617 } 1618 1619 private void sendUpdateSelection() { 1620 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1621 final InputMethodManager imm = InputMethodManager.peekInstance(); 1622 if (null != imm) { 1623 final int selectionStart = mTextView.getSelectionStart(); 1624 final int selectionEnd = mTextView.getSelectionEnd(); 1625 int candStart = -1; 1626 int candEnd = -1; 1627 if (mTextView.getText() instanceof Spannable) { 1628 final Spannable sp = (Spannable) mTextView.getText(); 1629 candStart = EditableInputConnection.getComposingSpanStart(sp); 1630 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1631 } 1632 // InputMethodManager#updateSelection skips sending the message if 1633 // none of the parameters have changed since the last time we called it. 1634 imm.updateSelection(mTextView, 1635 selectionStart, selectionEnd, candStart, candEnd); 1636 } 1637 } 1638 } 1639 1640 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1641 int cursorOffsetVertical) { 1642 final int selectionStart = mTextView.getSelectionStart(); 1643 final int selectionEnd = mTextView.getSelectionEnd(); 1644 1645 final InputMethodState ims = mInputMethodState; 1646 if (ims != null && ims.mBatchEditNesting == 0) { 1647 InputMethodManager imm = InputMethodManager.peekInstance(); 1648 if (imm != null) { 1649 if (imm.isActive(mTextView)) { 1650 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1651 // We are in extract mode and the content has changed 1652 // in some way... just report complete new text to the 1653 // input method. 1654 reportExtractedText(); 1655 } 1656 } 1657 } 1658 } 1659 1660 if (mCorrectionHighlighter != null) { 1661 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1662 } 1663 1664 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1665 drawCursor(canvas, cursorOffsetVertical); 1666 // Rely on the drawable entirely, do not draw the cursor line. 1667 // Has to be done after the IMM related code above which relies on the highlight. 1668 highlight = null; 1669 } 1670 1671 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1672 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1673 cursorOffsetVertical); 1674 } else { 1675 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1676 } 1677 } 1678 1679 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1680 Paint highlightPaint, int cursorOffsetVertical) { 1681 final long lineRange = layout.getLineRangeForDraw(canvas); 1682 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1683 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1684 if (lastLine < 0) return; 1685 1686 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1687 firstLine, lastLine); 1688 1689 if (layout instanceof DynamicLayout) { 1690 if (mTextRenderNodes == null) { 1691 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1692 } 1693 1694 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1695 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1696 int[] blockIndices = dynamicLayout.getBlockIndices(); 1697 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1698 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1699 1700 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1701 if (blockSet != null) { 1702 for (int i = 0; i < blockSet.size(); i++) { 1703 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1704 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1705 && mTextRenderNodes[blockIndex] != null) { 1706 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1707 } 1708 } 1709 } 1710 1711 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1712 if (startBlock < 0) { 1713 startBlock = -(startBlock + 1); 1714 } 1715 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1716 1717 int startIndexToFindAvailableRenderNode = 0; 1718 int lastIndex = numberOfBlocks; 1719 1720 for (int i = startBlock; i < numberOfBlocks; i++) { 1721 final int blockIndex = blockIndices[i]; 1722 if (i >= indexFirstChangedBlock 1723 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1724 && mTextRenderNodes[blockIndex] != null) { 1725 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1726 } 1727 if (blockEndLines[i] < firstLine) { 1728 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1729 // be redrawn after they get scrolled into drawing range. 1730 continue; 1731 } 1732 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1733 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1734 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1735 if (blockEndLines[i] >= lastLine) { 1736 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1737 break; 1738 } 1739 } 1740 if (blockSet != null) { 1741 for (int i = 0; i < blockSet.size(); i++) { 1742 final int block = blockSet.valueAt(i); 1743 final int blockIndex = dynamicLayout.getBlockIndex(block); 1744 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1745 || mTextRenderNodes[blockIndex] == null 1746 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1747 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1748 layout, highlight, highlightPaint, cursorOffsetVertical, 1749 blockEndLines, blockIndices, block, numberOfBlocks, 1750 startIndexToFindAvailableRenderNode); 1751 } 1752 } 1753 } 1754 1755 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1756 } else { 1757 // Boring layout is used for empty and hint text 1758 layout.drawText(canvas, firstLine, lastLine); 1759 } 1760 } 1761 1762 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1763 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1764 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1765 int startIndexToFindAvailableRenderNode) { 1766 final int blockEndLine = blockEndLines[blockInfoIndex]; 1767 int blockIndex = blockIndices[blockInfoIndex]; 1768 1769 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1770 if (blockIsInvalid) { 1771 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1772 startIndexToFindAvailableRenderNode); 1773 // Note how dynamic layout's internal block indices get updated from Editor 1774 blockIndices[blockInfoIndex] = blockIndex; 1775 if (mTextRenderNodes[blockIndex] != null) { 1776 mTextRenderNodes[blockIndex].isDirty = true; 1777 } 1778 startIndexToFindAvailableRenderNode = blockIndex + 1; 1779 } 1780 1781 if (mTextRenderNodes[blockIndex] == null) { 1782 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1783 } 1784 1785 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1786 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1787 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1788 final int blockBeginLine = blockInfoIndex == 0 ? 1789 0 : blockEndLines[blockInfoIndex - 1] + 1; 1790 final int top = layout.getLineTop(blockBeginLine); 1791 final int bottom = layout.getLineBottom(blockEndLine); 1792 int left = 0; 1793 int right = mTextView.getWidth(); 1794 if (mTextView.getHorizontallyScrolling()) { 1795 float min = Float.MAX_VALUE; 1796 float max = Float.MIN_VALUE; 1797 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1798 min = Math.min(min, layout.getLineLeft(line)); 1799 max = Math.max(max, layout.getLineRight(line)); 1800 } 1801 left = (int) min; 1802 right = (int) (max + 0.5f); 1803 } 1804 1805 // Rebuild display list if it is invalid 1806 if (blockDisplayListIsInvalid) { 1807 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1808 right - left, bottom - top); 1809 try { 1810 // drawText is always relative to TextView's origin, this translation 1811 // brings this range of text back to the top left corner of the viewport 1812 displayListCanvas.translate(-left, -top); 1813 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1814 mTextRenderNodes[blockIndex].isDirty = false; 1815 // No need to untranslate, previous context is popped after 1816 // drawDisplayList 1817 } finally { 1818 blockDisplayList.end(displayListCanvas); 1819 // Same as drawDisplayList below, handled by our TextView's parent 1820 blockDisplayList.setClipToBounds(false); 1821 } 1822 } 1823 1824 // Valid display list only needs to update its drawing location. 1825 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1826 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1827 } 1828 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1829 return startIndexToFindAvailableRenderNode; 1830 } 1831 1832 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1833 int searchStartIndex) { 1834 int length = mTextRenderNodes.length; 1835 for (int i = searchStartIndex; i < length; i++) { 1836 boolean blockIndexFound = false; 1837 for (int j = 0; j < numberOfBlocks; j++) { 1838 if (blockIndices[j] == i) { 1839 blockIndexFound = true; 1840 break; 1841 } 1842 } 1843 if (blockIndexFound) continue; 1844 return i; 1845 } 1846 1847 // No available index found, the pool has to grow 1848 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1849 return length; 1850 } 1851 1852 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1853 final boolean translate = cursorOffsetVertical != 0; 1854 if (translate) canvas.translate(0, cursorOffsetVertical); 1855 for (int i = 0; i < mCursorCount; i++) { 1856 mCursorDrawable[i].draw(canvas); 1857 } 1858 if (translate) canvas.translate(0, -cursorOffsetVertical); 1859 } 1860 1861 void invalidateHandlesAndActionMode() { 1862 if (mSelectionModifierCursorController != null) { 1863 mSelectionModifierCursorController.invalidateHandles(); 1864 } 1865 if (mInsertionPointCursorController != null) { 1866 mInsertionPointCursorController.invalidateHandle(); 1867 } 1868 if (mTextActionMode != null) { 1869 mTextActionMode.invalidate(); 1870 } 1871 } 1872 1873 /** 1874 * Invalidates all the sub-display lists that overlap the specified character range 1875 */ 1876 void invalidateTextDisplayList(Layout layout, int start, int end) { 1877 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1878 final int firstLine = layout.getLineForOffset(start); 1879 final int lastLine = layout.getLineForOffset(end); 1880 1881 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1882 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1883 int[] blockIndices = dynamicLayout.getBlockIndices(); 1884 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1885 1886 int i = 0; 1887 // Skip the blocks before firstLine 1888 while (i < numberOfBlocks) { 1889 if (blockEndLines[i] >= firstLine) break; 1890 i++; 1891 } 1892 1893 // Invalidate all subsequent blocks until lastLine is passed 1894 while (i < numberOfBlocks) { 1895 final int blockIndex = blockIndices[i]; 1896 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1897 mTextRenderNodes[blockIndex].isDirty = true; 1898 } 1899 if (blockEndLines[i] >= lastLine) break; 1900 i++; 1901 } 1902 } 1903 } 1904 1905 void invalidateTextDisplayList() { 1906 if (mTextRenderNodes != null) { 1907 for (int i = 0; i < mTextRenderNodes.length; i++) { 1908 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1909 } 1910 } 1911 } 1912 1913 void updateCursorsPositions() { 1914 if (mTextView.mCursorDrawableRes == 0) { 1915 mCursorCount = 0; 1916 return; 1917 } 1918 1919 Layout layout = mTextView.getLayout(); 1920 final int offset = mTextView.getSelectionStart(); 1921 final int line = layout.getLineForOffset(offset); 1922 final int top = layout.getLineTop(line); 1923 final int bottom = layout.getLineTop(line + 1); 1924 1925 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1926 1927 int middle = bottom; 1928 if (mCursorCount == 2) { 1929 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1930 middle = (top + bottom) >> 1; 1931 } 1932 1933 boolean clamped = layout.shouldClampCursor(line); 1934 updateCursorPosition(0, top, middle, layout.getPrimaryHorizontal(offset, clamped, true)); 1935 1936 if (mCursorCount == 2) { 1937 updateCursorPosition(1, middle, bottom, 1938 layout.getSecondaryHorizontal(offset, clamped, true)); 1939 } 1940 } 1941 1942 void refreshTextActionMode() { 1943 if (extractedTextModeWillBeStarted()) { 1944 mRestartActionModeOnNextRefresh = false; 1945 return; 1946 } 1947 final boolean hasSelection = mTextView.hasSelection(); 1948 final SelectionModifierCursorController selectionController = getSelectionController(); 1949 final InsertionPointCursorController insertionController = getInsertionController(); 1950 if ((selectionController != null && selectionController.isCursorBeingModified()) 1951 || (insertionController != null && insertionController.isCursorBeingModified())) { 1952 // ActionMode should be managed by the currently active cursor controller. 1953 mRestartActionModeOnNextRefresh = false; 1954 return; 1955 } 1956 if (hasSelection) { 1957 hideInsertionPointCursorController(); 1958 if (mTextActionMode == null) { 1959 if (mRestartActionModeOnNextRefresh) { 1960 // To avoid distraction, newly start action mode only when selection action 1961 // mode is being restarted. 1962 startSelectionActionMode(); 1963 } 1964 } else if (selectionController == null || !selectionController.isActive()) { 1965 // Insertion action mode is active. Avoid dismissing the selection. 1966 stopTextActionModeWithPreservingSelection(); 1967 startSelectionActionMode(); 1968 } else { 1969 mTextActionMode.invalidateContentRect(); 1970 } 1971 } else { 1972 // Insertion action mode is started only when insertion controller is explicitly 1973 // activated. 1974 if (insertionController == null || !insertionController.isActive()) { 1975 stopTextActionMode(); 1976 } else if (mTextActionMode != null) { 1977 mTextActionMode.invalidateContentRect(); 1978 } 1979 } 1980 mRestartActionModeOnNextRefresh = false; 1981 } 1982 1983 /** 1984 * Start an Insertion action mode. 1985 */ 1986 void startInsertionActionMode() { 1987 if (mInsertionActionModeRunnable != null) { 1988 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1989 } 1990 if (extractedTextModeWillBeStarted()) { 1991 return; 1992 } 1993 stopTextActionMode(); 1994 1995 ActionMode.Callback actionModeCallback = 1996 new TextActionModeCallback(false /* hasSelection */); 1997 mTextActionMode = mTextView.startActionMode( 1998 actionModeCallback, ActionMode.TYPE_FLOATING); 1999 if (mTextActionMode != null && getInsertionController() != null) { 2000 getInsertionController().show(); 2001 } 2002 } 2003 2004 /** 2005 * Starts a Selection Action Mode with the current selection and ensures the selection handles 2006 * are shown if there is a selection. This should be used when the mode is started from a 2007 * non-touch event. 2008 * 2009 * @return true if the selection mode was actually started. 2010 */ 2011 boolean startSelectionActionMode() { 2012 boolean selectionStarted = startSelectionActionModeInternal(); 2013 if (selectionStarted) { 2014 getSelectionController().show(); 2015 } 2016 mRestartActionModeOnNextRefresh = false; 2017 return selectionStarted; 2018 } 2019 2020 /** 2021 * If the TextView allows text selection, selects the current word when no existing selection 2022 * was available and starts a drag. 2023 * 2024 * @return true if the drag was started. 2025 */ 2026 private boolean selectCurrentWordAndStartDrag() { 2027 if (mInsertionActionModeRunnable != null) { 2028 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2029 } 2030 if (extractedTextModeWillBeStarted()) { 2031 return false; 2032 } 2033 if (!checkField()) { 2034 return false; 2035 } 2036 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2037 // No selection and cannot select a word. 2038 return false; 2039 } 2040 stopTextActionModeWithPreservingSelection(); 2041 getSelectionController().enterDrag( 2042 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2043 return true; 2044 } 2045 2046 /** 2047 * Checks whether a selection can be performed on the current TextView. 2048 * 2049 * @return true if a selection can be performed 2050 */ 2051 boolean checkField() { 2052 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2053 Log.w(TextView.LOG_TAG, 2054 "TextView does not support text selection. Selection cancelled."); 2055 return false; 2056 } 2057 return true; 2058 } 2059 2060 private boolean startSelectionActionModeInternal() { 2061 if (extractedTextModeWillBeStarted()) { 2062 return false; 2063 } 2064 if (mTextActionMode != null) { 2065 // Text action mode is already started 2066 mTextActionMode.invalidate(); 2067 return false; 2068 } 2069 2070 if (!checkField() || !mTextView.hasSelection()) { 2071 return false; 2072 } 2073 2074 ActionMode.Callback actionModeCallback = 2075 new TextActionModeCallback(true /* hasSelection */); 2076 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2077 2078 final boolean selectionStarted = mTextActionMode != null; 2079 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2080 // Show the IME to be able to replace text, except when selecting non editable text. 2081 final InputMethodManager imm = InputMethodManager.peekInstance(); 2082 if (imm != null) { 2083 imm.showSoftInput(mTextView, 0, null); 2084 } 2085 } 2086 return selectionStarted; 2087 } 2088 2089 private boolean extractedTextModeWillBeStarted() { 2090 if (!(mTextView.isInExtractedMode())) { 2091 final InputMethodManager imm = InputMethodManager.peekInstance(); 2092 return imm != null && imm.isFullscreenMode(); 2093 } 2094 return false; 2095 } 2096 2097 /** 2098 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2099 * the current cursor position or selection range. This method is consistent with the 2100 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2101 */ 2102 private boolean shouldOfferToShowSuggestions() { 2103 CharSequence text = mTextView.getText(); 2104 if (!(text instanceof Spannable)) return false; 2105 2106 final Spannable spannable = (Spannable) text; 2107 final int selectionStart = mTextView.getSelectionStart(); 2108 final int selectionEnd = mTextView.getSelectionEnd(); 2109 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2110 SuggestionSpan.class); 2111 if (suggestionSpans.length == 0) { 2112 return false; 2113 } 2114 if (selectionStart == selectionEnd) { 2115 // Spans overlap the cursor. 2116 for (int i = 0; i < suggestionSpans.length; i++) { 2117 if (suggestionSpans[i].getSuggestions().length > 0) { 2118 return true; 2119 } 2120 } 2121 return false; 2122 } 2123 int minSpanStart = mTextView.getText().length(); 2124 int maxSpanEnd = 0; 2125 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2126 int unionOfSpansCoveringSelectionStartEnd = 0; 2127 boolean hasValidSuggestions = false; 2128 for (int i = 0; i < suggestionSpans.length; i++) { 2129 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2130 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2131 minSpanStart = Math.min(minSpanStart, spanStart); 2132 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2133 if (selectionStart < spanStart || selectionStart > spanEnd) { 2134 // The span doesn't cover the current selection start point. 2135 continue; 2136 } 2137 hasValidSuggestions = 2138 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2139 unionOfSpansCoveringSelectionStartStart = 2140 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2141 unionOfSpansCoveringSelectionStartEnd = 2142 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2143 } 2144 if (!hasValidSuggestions) { 2145 return false; 2146 } 2147 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2148 // No spans cover the selection start point. 2149 return false; 2150 } 2151 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2152 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2153 // There is a span that is not covered by the union. In this case, we soouldn't offer 2154 // to show suggestions as it's confusing. 2155 return false; 2156 } 2157 return true; 2158 } 2159 2160 /** 2161 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2162 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2163 */ 2164 private boolean isCursorInsideEasyCorrectionSpan() { 2165 Spannable spannable = (Spannable) mTextView.getText(); 2166 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2167 mTextView.getSelectionEnd(), SuggestionSpan.class); 2168 for (int i = 0; i < suggestionSpans.length; i++) { 2169 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2170 return true; 2171 } 2172 } 2173 return false; 2174 } 2175 2176 void onTouchUpEvent(MotionEvent event) { 2177 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2178 hideCursorAndSpanControllers(); 2179 stopTextActionMode(); 2180 CharSequence text = mTextView.getText(); 2181 if (!selectAllGotFocus && text.length() > 0) { 2182 // Move cursor 2183 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2184 Selection.setSelection((Spannable) text, offset); 2185 if (mSpellChecker != null) { 2186 // When the cursor moves, the word that was typed may need spell check 2187 mSpellChecker.onSelectionChanged(); 2188 } 2189 2190 if (!extractedTextModeWillBeStarted()) { 2191 if (isCursorInsideEasyCorrectionSpan()) { 2192 // Cancel the single tap delayed runnable. 2193 if (mInsertionActionModeRunnable != null) { 2194 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2195 } 2196 2197 mShowSuggestionRunnable = new Runnable() { 2198 public void run() { 2199 replace(); 2200 } 2201 }; 2202 // removeCallbacks is performed on every touch 2203 mTextView.postDelayed(mShowSuggestionRunnable, 2204 ViewConfiguration.getDoubleTapTimeout()); 2205 } else if (hasInsertionController()) { 2206 getInsertionController().show(); 2207 } 2208 } 2209 } 2210 } 2211 2212 protected void stopTextActionMode() { 2213 if (mTextActionMode != null) { 2214 // This will hide the mSelectionModifierCursorController 2215 mTextActionMode.finish(); 2216 } 2217 } 2218 2219 private void stopTextActionModeWithPreservingSelection() { 2220 if (mTextActionMode != null) { 2221 mRestartActionModeOnNextRefresh = true; 2222 } 2223 mPreserveSelection = true; 2224 stopTextActionMode(); 2225 mPreserveSelection = false; 2226 } 2227 2228 /** 2229 * @return True if this view supports insertion handles. 2230 */ 2231 boolean hasInsertionController() { 2232 return mInsertionControllerEnabled; 2233 } 2234 2235 /** 2236 * @return True if this view supports selection handles. 2237 */ 2238 boolean hasSelectionController() { 2239 return mSelectionControllerEnabled; 2240 } 2241 2242 private InsertionPointCursorController getInsertionController() { 2243 if (!mInsertionControllerEnabled) { 2244 return null; 2245 } 2246 2247 if (mInsertionPointCursorController == null) { 2248 mInsertionPointCursorController = new InsertionPointCursorController(); 2249 2250 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2251 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2252 } 2253 2254 return mInsertionPointCursorController; 2255 } 2256 2257 private SelectionModifierCursorController getSelectionController() { 2258 if (!mSelectionControllerEnabled) { 2259 return null; 2260 } 2261 2262 if (mSelectionModifierCursorController == null) { 2263 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2264 2265 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2266 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2267 } 2268 2269 return mSelectionModifierCursorController; 2270 } 2271 2272 @VisibleForTesting 2273 public Drawable[] getCursorDrawable() { 2274 return mCursorDrawable; 2275 } 2276 2277 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2278 if (mCursorDrawable[cursorIndex] == null) { 2279 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2280 mTextView.mCursorDrawableRes); 2281 } 2282 final Drawable drawable = mCursorDrawable[cursorIndex]; 2283 final int left = clampHorizontalPosition(drawable, horizontal); 2284 final int width = drawable.getIntrinsicWidth(); 2285 drawable.setBounds(left, top - mTempRect.top, left + width, 2286 bottom + mTempRect.bottom); 2287 } 2288 2289 /** 2290 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2291 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2292 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2293 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2294 * of the view. 2295 * 2296 * @param drawable Drawable. Can be null. 2297 * @param horizontal Horizontal position for the drawable. 2298 * @return The clamped horizontal position for the drawable. 2299 */ 2300 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2301 horizontal = Math.max(0.5f, horizontal - 0.5f); 2302 if (mTempRect == null) mTempRect = new Rect(); 2303 2304 int drawableWidth = 0; 2305 if (drawable != null) { 2306 drawable.getPadding(mTempRect); 2307 drawableWidth = drawable.getIntrinsicWidth(); 2308 } else { 2309 mTempRect.setEmpty(); 2310 } 2311 2312 int scrollX = mTextView.getScrollX(); 2313 float horizontalDiff = horizontal - scrollX; 2314 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2315 - mTextView.getCompoundPaddingRight(); 2316 2317 final int left; 2318 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2319 // at the rightmost position 2320 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2321 } else if (Math.abs(horizontalDiff) <= 1f 2322 || (TextUtils.isEmpty(mTextView.getText()) 2323 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2324 && horizontal <= 1f)) { 2325 // at the leftmost position 2326 left = scrollX - mTempRect.left; 2327 } else { 2328 left = (int) horizontal - mTempRect.left; 2329 } 2330 return left; 2331 } 2332 2333 /** 2334 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2335 * a dictionary) from the current input method, provided by it calling 2336 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2337 * implementation flashes the background of the corrected word to provide feedback to the user. 2338 * 2339 * @param info The auto correct info about the text that was corrected. 2340 */ 2341 public void onCommitCorrection(CorrectionInfo info) { 2342 if (mCorrectionHighlighter == null) { 2343 mCorrectionHighlighter = new CorrectionHighlighter(); 2344 } else { 2345 mCorrectionHighlighter.invalidate(false); 2346 } 2347 2348 mCorrectionHighlighter.highlight(info); 2349 mUndoInputFilter.freezeLastEdit(); 2350 } 2351 2352 void onScrollChanged() { 2353 if (mPositionListener != null) { 2354 mPositionListener.onScrollChanged(); 2355 } 2356 if (mTextActionMode != null) { 2357 mTextActionMode.invalidateContentRect(); 2358 } 2359 } 2360 2361 /** 2362 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2363 */ 2364 private boolean shouldBlink() { 2365 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2366 2367 final int start = mTextView.getSelectionStart(); 2368 if (start < 0) return false; 2369 2370 final int end = mTextView.getSelectionEnd(); 2371 if (end < 0) return false; 2372 2373 return start == end; 2374 } 2375 2376 void makeBlink() { 2377 if (shouldBlink()) { 2378 mShowCursor = SystemClock.uptimeMillis(); 2379 if (mBlink == null) mBlink = new Blink(); 2380 mTextView.removeCallbacks(mBlink); 2381 mTextView.postDelayed(mBlink, BLINK); 2382 } else { 2383 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2384 } 2385 } 2386 2387 private class Blink implements Runnable { 2388 private boolean mCancelled; 2389 2390 public void run() { 2391 if (mCancelled) { 2392 return; 2393 } 2394 2395 mTextView.removeCallbacks(this); 2396 2397 if (shouldBlink()) { 2398 if (mTextView.getLayout() != null) { 2399 mTextView.invalidateCursorPath(); 2400 } 2401 2402 mTextView.postDelayed(this, BLINK); 2403 } 2404 } 2405 2406 void cancel() { 2407 if (!mCancelled) { 2408 mTextView.removeCallbacks(this); 2409 mCancelled = true; 2410 } 2411 } 2412 2413 void uncancel() { 2414 mCancelled = false; 2415 } 2416 } 2417 2418 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2419 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2420 com.android.internal.R.layout.text_drag_thumbnail, null); 2421 2422 if (shadowView == null) { 2423 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2424 } 2425 2426 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2427 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2428 end = TextUtils.unpackRangeEndFromLong(range); 2429 } 2430 final CharSequence text = mTextView.getTransformedText(start, end); 2431 shadowView.setText(text); 2432 shadowView.setTextColor(mTextView.getTextColors()); 2433 2434 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2435 shadowView.setGravity(Gravity.CENTER); 2436 2437 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2438 ViewGroup.LayoutParams.WRAP_CONTENT)); 2439 2440 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2441 shadowView.measure(size, size); 2442 2443 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2444 shadowView.invalidate(); 2445 return new DragShadowBuilder(shadowView); 2446 } 2447 2448 private static class DragLocalState { 2449 public TextView sourceTextView; 2450 public int start, end; 2451 2452 public DragLocalState(TextView sourceTextView, int start, int end) { 2453 this.sourceTextView = sourceTextView; 2454 this.start = start; 2455 this.end = end; 2456 } 2457 } 2458 2459 void onDrop(DragEvent event) { 2460 StringBuilder content = new StringBuilder(""); 2461 2462 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2463 if (permissions != null) { 2464 permissions.takeTransient(); 2465 } 2466 2467 try { 2468 ClipData clipData = event.getClipData(); 2469 final int itemCount = clipData.getItemCount(); 2470 for (int i = 0; i < itemCount; i++) { 2471 Item item = clipData.getItemAt(i); 2472 content.append(item.coerceToStyledText(mTextView.getContext())); 2473 } 2474 } finally { 2475 if (permissions != null) { 2476 permissions.release(); 2477 } 2478 } 2479 2480 mTextView.beginBatchEdit(); 2481 mUndoInputFilter.freezeLastEdit(); 2482 try { 2483 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2484 Object localState = event.getLocalState(); 2485 DragLocalState dragLocalState = null; 2486 if (localState instanceof DragLocalState) { 2487 dragLocalState = (DragLocalState) localState; 2488 } 2489 boolean dragDropIntoItself = dragLocalState != null 2490 && dragLocalState.sourceTextView == mTextView; 2491 2492 if (dragDropIntoItself) { 2493 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2494 // A drop inside the original selection discards the drop. 2495 return; 2496 } 2497 } 2498 2499 final int originalLength = mTextView.getText().length(); 2500 int min = offset; 2501 int max = offset; 2502 2503 Selection.setSelection((Spannable) mTextView.getText(), max); 2504 mTextView.replaceText_internal(min, max, content); 2505 2506 if (dragDropIntoItself) { 2507 int dragSourceStart = dragLocalState.start; 2508 int dragSourceEnd = dragLocalState.end; 2509 if (max <= dragSourceStart) { 2510 // Inserting text before selection has shifted positions 2511 final int shift = mTextView.getText().length() - originalLength; 2512 dragSourceStart += shift; 2513 dragSourceEnd += shift; 2514 } 2515 2516 // Delete original selection 2517 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2518 2519 // Make sure we do not leave two adjacent spaces. 2520 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2521 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2522 if (nextCharIdx > prevCharIdx + 1) { 2523 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2524 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2525 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2526 } 2527 } 2528 } 2529 } finally { 2530 mTextView.endBatchEdit(); 2531 mUndoInputFilter.freezeLastEdit(); 2532 } 2533 } 2534 2535 public void addSpanWatchers(Spannable text) { 2536 final int textLength = text.length(); 2537 2538 if (mKeyListener != null) { 2539 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2540 } 2541 2542 if (mSpanController == null) { 2543 mSpanController = new SpanController(); 2544 } 2545 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2546 } 2547 2548 void setContextMenuAnchor(float x, float y) { 2549 mContextMenuAnchorX = x; 2550 mContextMenuAnchorY = y; 2551 } 2552 2553 void onCreateContextMenu(ContextMenu menu) { 2554 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2555 || Float.isNaN(mContextMenuAnchorY)) { 2556 return; 2557 } 2558 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2559 if (offset == -1) { 2560 return; 2561 } 2562 stopTextActionModeWithPreservingSelection(); 2563 final boolean isOnSelection = mTextView.hasSelection() 2564 && offset >= mTextView.getSelectionStart() && offset <= mTextView.getSelectionEnd(); 2565 if (!isOnSelection) { 2566 // Right clicked position is not on the selection. Remove the selection and move the 2567 // cursor to the right clicked position. 2568 Selection.setSelection((Spannable) mTextView.getText(), offset); 2569 stopTextActionMode(); 2570 } 2571 2572 if (shouldOfferToShowSuggestions()) { 2573 final SuggestionInfo[] suggestionInfoArray = 2574 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2575 for (int i = 0; i < suggestionInfoArray.length; i++) { 2576 suggestionInfoArray[i] = new SuggestionInfo(); 2577 } 2578 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2579 com.android.internal.R.string.replace); 2580 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2581 for (int i = 0; i < numItems; i++) { 2582 final SuggestionInfo info = suggestionInfoArray[i]; 2583 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2584 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2585 @Override 2586 public boolean onMenuItemClick(MenuItem item) { 2587 replaceWithSuggestion(info); 2588 return true; 2589 } 2590 }); 2591 } 2592 } 2593 2594 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2595 com.android.internal.R.string.undo) 2596 .setAlphabeticShortcut('z') 2597 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2598 .setEnabled(mTextView.canUndo()); 2599 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2600 com.android.internal.R.string.redo) 2601 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2602 .setEnabled(mTextView.canRedo()); 2603 2604 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2605 com.android.internal.R.string.cut) 2606 .setAlphabeticShortcut('x') 2607 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2608 .setEnabled(mTextView.canCut()); 2609 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2610 com.android.internal.R.string.copy) 2611 .setAlphabeticShortcut('c') 2612 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2613 .setEnabled(mTextView.canCopy()); 2614 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2615 com.android.internal.R.string.paste) 2616 .setAlphabeticShortcut('v') 2617 .setEnabled(mTextView.canPaste()) 2618 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2619 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2620 com.android.internal.R.string.paste_as_plain_text) 2621 .setEnabled(mTextView.canPaste()) 2622 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2623 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2624 com.android.internal.R.string.share) 2625 .setEnabled(mTextView.canShare()) 2626 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2627 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2628 com.android.internal.R.string.selectAll) 2629 .setAlphabeticShortcut('a') 2630 .setEnabled(mTextView.canSelectAllText()) 2631 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2632 2633 mPreserveSelection = true; 2634 } 2635 2636 @Nullable 2637 private SuggestionSpan findEquivalentSuggestionSpan( 2638 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2639 final Editable editable = (Editable) mTextView.getText(); 2640 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2641 // Exactly same span is found. 2642 return suggestionSpanInfo.mSuggestionSpan; 2643 } 2644 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2645 // contents. 2646 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2647 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2648 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2649 final int start = editable.getSpanStart(suggestionSpan); 2650 if (start != suggestionSpanInfo.mSpanStart) { 2651 continue; 2652 } 2653 final int end = editable.getSpanEnd(suggestionSpan); 2654 if (end != suggestionSpanInfo.mSpanEnd) { 2655 continue; 2656 } 2657 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2658 return suggestionSpan; 2659 } 2660 } 2661 return null; 2662 } 2663 2664 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2665 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2666 suggestionInfo.mSuggestionSpanInfo); 2667 if (targetSuggestionSpan == null) { 2668 // Span has been removed 2669 return; 2670 } 2671 final Editable editable = (Editable) mTextView.getText(); 2672 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2673 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2674 if (spanStart < 0 || spanEnd <= spanStart) { 2675 // Span has been removed 2676 return; 2677 } 2678 2679 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2680 // SuggestionSpans are removed by replace: save them before 2681 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2682 SuggestionSpan.class); 2683 final int length = suggestionSpans.length; 2684 int[] suggestionSpansStarts = new int[length]; 2685 int[] suggestionSpansEnds = new int[length]; 2686 int[] suggestionSpansFlags = new int[length]; 2687 for (int i = 0; i < length; i++) { 2688 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2689 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2690 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2691 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2692 2693 // Remove potential misspelled flags 2694 int suggestionSpanFlags = suggestionSpan.getFlags(); 2695 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2696 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2697 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2698 suggestionSpan.setFlags(suggestionSpanFlags); 2699 } 2700 } 2701 2702 // Notify source IME of the suggestion pick. Do this before swapping texts. 2703 targetSuggestionSpan.notifySelection( 2704 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2705 2706 // Swap text content between actual text and Suggestion span 2707 final int suggestionStart = suggestionInfo.mSuggestionStart; 2708 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2709 final String suggestion = suggestionInfo.mText.subSequence( 2710 suggestionStart, suggestionEnd).toString(); 2711 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2712 2713 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2714 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2715 2716 // Restore previous SuggestionSpans 2717 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2718 for (int i = 0; i < length; i++) { 2719 // Only spans that include the modified region make sense after replacement 2720 // Spans partially included in the replaced region are removed, there is no 2721 // way to assign them a valid range after replacement 2722 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2723 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2724 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2725 } 2726 } 2727 // Move cursor at the end of the replaced word 2728 final int newCursorPosition = spanEnd + lengthDelta; 2729 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2730 } 2731 2732 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2733 new MenuItem.OnMenuItemClickListener() { 2734 @Override 2735 public boolean onMenuItemClick(MenuItem item) { 2736 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2737 return true; 2738 } 2739 return mTextView.onTextContextMenuItem(item.getItemId()); 2740 } 2741 }; 2742 2743 /** 2744 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2745 * pop-up should be displayed. 2746 * Also monitors {@link Selection} to call back to the attached input method. 2747 */ 2748 private class SpanController implements SpanWatcher { 2749 2750 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2751 2752 private EasyEditPopupWindow mPopupWindow; 2753 2754 private Runnable mHidePopup; 2755 2756 // This function is pure but inner classes can't have static functions 2757 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2758 final Object span) { 2759 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2760 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2761 } 2762 2763 @Override 2764 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2765 if (isNonIntermediateSelectionSpan(text, span)) { 2766 sendUpdateSelection(); 2767 } else if (span instanceof EasyEditSpan) { 2768 if (mPopupWindow == null) { 2769 mPopupWindow = new EasyEditPopupWindow(); 2770 mHidePopup = new Runnable() { 2771 @Override 2772 public void run() { 2773 hide(); 2774 } 2775 }; 2776 } 2777 2778 // Make sure there is only at most one EasyEditSpan in the text 2779 if (mPopupWindow.mEasyEditSpan != null) { 2780 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2781 } 2782 2783 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2784 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2785 @Override 2786 public void onDeleteClick(EasyEditSpan span) { 2787 Editable editable = (Editable) mTextView.getText(); 2788 int start = editable.getSpanStart(span); 2789 int end = editable.getSpanEnd(span); 2790 if (start >= 0 && end >= 0) { 2791 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2792 mTextView.deleteText_internal(start, end); 2793 } 2794 editable.removeSpan(span); 2795 } 2796 }); 2797 2798 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2799 // The window is not visible yet, ignore the text change. 2800 return; 2801 } 2802 2803 if (mTextView.getLayout() == null) { 2804 // The view has not been laid out yet, ignore the text change 2805 return; 2806 } 2807 2808 if (extractedTextModeWillBeStarted()) { 2809 // The input is in extract mode. Do not handle the easy edit in 2810 // the original TextView, as the ExtractEditText will do 2811 return; 2812 } 2813 2814 mPopupWindow.show(); 2815 mTextView.removeCallbacks(mHidePopup); 2816 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2817 } 2818 } 2819 2820 @Override 2821 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2822 if (isNonIntermediateSelectionSpan(text, span)) { 2823 sendUpdateSelection(); 2824 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2825 hide(); 2826 } 2827 } 2828 2829 @Override 2830 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2831 int newStart, int newEnd) { 2832 if (isNonIntermediateSelectionSpan(text, span)) { 2833 sendUpdateSelection(); 2834 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2835 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2836 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2837 text.removeSpan(easyEditSpan); 2838 } 2839 } 2840 2841 public void hide() { 2842 if (mPopupWindow != null) { 2843 mPopupWindow.hide(); 2844 mTextView.removeCallbacks(mHidePopup); 2845 } 2846 } 2847 2848 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2849 try { 2850 PendingIntent pendingIntent = span.getPendingIntent(); 2851 if (pendingIntent != null) { 2852 Intent intent = new Intent(); 2853 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2854 pendingIntent.send(mTextView.getContext(), 0, intent); 2855 } 2856 } catch (CanceledException e) { 2857 // This should not happen, as we should try to send the intent only once. 2858 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2859 } 2860 } 2861 } 2862 2863 /** 2864 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2865 */ 2866 private interface EasyEditDeleteListener { 2867 2868 /** 2869 * Clicks the delete pop-up. 2870 */ 2871 void onDeleteClick(EasyEditSpan span); 2872 } 2873 2874 /** 2875 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2876 * by {@link SpanController}. 2877 */ 2878 private class EasyEditPopupWindow extends PinnedPopupWindow 2879 implements OnClickListener { 2880 private static final int POPUP_TEXT_LAYOUT = 2881 com.android.internal.R.layout.text_edit_action_popup_text; 2882 private TextView mDeleteTextView; 2883 private EasyEditSpan mEasyEditSpan; 2884 private EasyEditDeleteListener mOnDeleteListener; 2885 2886 @Override 2887 protected void createPopupWindow() { 2888 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2889 com.android.internal.R.attr.textSelectHandleWindowStyle); 2890 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2891 mPopupWindow.setClippingEnabled(true); 2892 } 2893 2894 @Override 2895 protected void initContentView() { 2896 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2897 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2898 mContentView = linearLayout; 2899 mContentView.setBackgroundResource( 2900 com.android.internal.R.drawable.text_edit_side_paste_window); 2901 2902 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 2903 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2904 2905 LayoutParams wrapContent = new LayoutParams( 2906 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2907 2908 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2909 mDeleteTextView.setLayoutParams(wrapContent); 2910 mDeleteTextView.setText(com.android.internal.R.string.delete); 2911 mDeleteTextView.setOnClickListener(this); 2912 mContentView.addView(mDeleteTextView); 2913 } 2914 2915 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2916 mEasyEditSpan = easyEditSpan; 2917 } 2918 2919 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2920 mOnDeleteListener = listener; 2921 } 2922 2923 @Override 2924 public void onClick(View view) { 2925 if (view == mDeleteTextView 2926 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2927 && mOnDeleteListener != null) { 2928 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2929 } 2930 } 2931 2932 @Override 2933 public void hide() { 2934 if (mEasyEditSpan != null) { 2935 mEasyEditSpan.setDeleteEnabled(false); 2936 } 2937 mOnDeleteListener = null; 2938 super.hide(); 2939 } 2940 2941 @Override 2942 protected int getTextOffset() { 2943 // Place the pop-up at the end of the span 2944 Editable editable = (Editable) mTextView.getText(); 2945 return editable.getSpanEnd(mEasyEditSpan); 2946 } 2947 2948 @Override 2949 protected int getVerticalLocalPosition(int line) { 2950 return mTextView.getLayout().getLineBottom(line); 2951 } 2952 2953 @Override 2954 protected int clipVertically(int positionY) { 2955 // As we display the pop-up below the span, no vertical clipping is required. 2956 return positionY; 2957 } 2958 } 2959 2960 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2961 // 3 handles 2962 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2963 // 1 CursorAnchorInfoNotifier 2964 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2965 private TextViewPositionListener[] mPositionListeners = 2966 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2967 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2968 private boolean mPositionHasChanged = true; 2969 // Absolute position of the TextView with respect to its parent window 2970 private int mPositionX, mPositionY; 2971 private int mPositionXOnScreen, mPositionYOnScreen; 2972 private int mNumberOfListeners; 2973 private boolean mScrollHasChanged; 2974 final int[] mTempCoords = new int[2]; 2975 2976 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2977 if (mNumberOfListeners == 0) { 2978 updatePosition(); 2979 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2980 vto.addOnPreDrawListener(this); 2981 } 2982 2983 int emptySlotIndex = -1; 2984 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2985 TextViewPositionListener listener = mPositionListeners[i]; 2986 if (listener == positionListener) { 2987 return; 2988 } else if (emptySlotIndex < 0 && listener == null) { 2989 emptySlotIndex = i; 2990 } 2991 } 2992 2993 mPositionListeners[emptySlotIndex] = positionListener; 2994 mCanMove[emptySlotIndex] = canMove; 2995 mNumberOfListeners++; 2996 } 2997 2998 public void removeSubscriber(TextViewPositionListener positionListener) { 2999 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3000 if (mPositionListeners[i] == positionListener) { 3001 mPositionListeners[i] = null; 3002 mNumberOfListeners--; 3003 break; 3004 } 3005 } 3006 3007 if (mNumberOfListeners == 0) { 3008 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3009 vto.removeOnPreDrawListener(this); 3010 } 3011 } 3012 3013 public int getPositionX() { 3014 return mPositionX; 3015 } 3016 3017 public int getPositionY() { 3018 return mPositionY; 3019 } 3020 3021 public int getPositionXOnScreen() { 3022 return mPositionXOnScreen; 3023 } 3024 3025 public int getPositionYOnScreen() { 3026 return mPositionYOnScreen; 3027 } 3028 3029 @Override 3030 public boolean onPreDraw() { 3031 updatePosition(); 3032 3033 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3034 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3035 TextViewPositionListener positionListener = mPositionListeners[i]; 3036 if (positionListener != null) { 3037 positionListener.updatePosition(mPositionX, mPositionY, 3038 mPositionHasChanged, mScrollHasChanged); 3039 } 3040 } 3041 } 3042 3043 mScrollHasChanged = false; 3044 return true; 3045 } 3046 3047 private void updatePosition() { 3048 mTextView.getLocationInWindow(mTempCoords); 3049 3050 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3051 3052 mPositionX = mTempCoords[0]; 3053 mPositionY = mTempCoords[1]; 3054 3055 mTextView.getLocationOnScreen(mTempCoords); 3056 3057 mPositionXOnScreen = mTempCoords[0]; 3058 mPositionYOnScreen = mTempCoords[1]; 3059 } 3060 3061 public void onScrollChanged() { 3062 mScrollHasChanged = true; 3063 } 3064 } 3065 3066 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3067 protected PopupWindow mPopupWindow; 3068 protected ViewGroup mContentView; 3069 int mPositionX, mPositionY; 3070 int mClippingLimitLeft, mClippingLimitRight; 3071 3072 protected abstract void createPopupWindow(); 3073 protected abstract void initContentView(); 3074 protected abstract int getTextOffset(); 3075 protected abstract int getVerticalLocalPosition(int line); 3076 protected abstract int clipVertically(int positionY); 3077 protected void setUp() { 3078 } 3079 3080 public PinnedPopupWindow() { 3081 // Due to calling subclass methods in base constructor, subclass constructor is not 3082 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3083 // a chance to initialize subclasses, call setUp() method here. 3084 // TODO: It is good to extract non trivial initialization code from constructor. 3085 setUp(); 3086 3087 createPopupWindow(); 3088 3089 mPopupWindow.setWindowLayoutType( 3090 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3091 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3092 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3093 3094 initContentView(); 3095 3096 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3097 ViewGroup.LayoutParams.WRAP_CONTENT); 3098 mContentView.setLayoutParams(wrapContent); 3099 3100 mPopupWindow.setContentView(mContentView); 3101 } 3102 3103 public void show() { 3104 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3105 3106 computeLocalPosition(); 3107 3108 final PositionListener positionListener = getPositionListener(); 3109 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3110 } 3111 3112 protected void measureContent() { 3113 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3114 mContentView.measure( 3115 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3116 View.MeasureSpec.AT_MOST), 3117 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3118 View.MeasureSpec.AT_MOST)); 3119 } 3120 3121 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3122 * positioned according to viewportToContentHorizontalOffset. 3123 * 3124 * This method assumes that mContentView has properly been measured from its content. */ 3125 private void computeLocalPosition() { 3126 measureContent(); 3127 final int width = mContentView.getMeasuredWidth(); 3128 final int offset = getTextOffset(); 3129 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3130 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3131 3132 final int line = mTextView.getLayout().getLineForOffset(offset); 3133 mPositionY = getVerticalLocalPosition(line); 3134 mPositionY += mTextView.viewportToContentVerticalOffset(); 3135 } 3136 3137 private void updatePosition(int parentPositionX, int parentPositionY) { 3138 int positionX = parentPositionX + mPositionX; 3139 int positionY = parentPositionY + mPositionY; 3140 3141 positionY = clipVertically(positionY); 3142 3143 // Horizontal clipping 3144 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3145 final int width = mContentView.getMeasuredWidth(); 3146 positionX = Math.min( 3147 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3148 positionX = Math.max(-mClippingLimitLeft, positionX); 3149 3150 if (isShowing()) { 3151 mPopupWindow.update(positionX, positionY, -1, -1); 3152 } else { 3153 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3154 positionX, positionY); 3155 } 3156 } 3157 3158 public void hide() { 3159 if (!isShowing()) { 3160 return; 3161 } 3162 mPopupWindow.dismiss(); 3163 getPositionListener().removeSubscriber(this); 3164 } 3165 3166 @Override 3167 public void updatePosition(int parentPositionX, int parentPositionY, 3168 boolean parentPositionChanged, boolean parentScrolled) { 3169 // Either parentPositionChanged or parentScrolled is true, check if still visible 3170 if (isShowing() && isOffsetVisible(getTextOffset())) { 3171 if (parentScrolled) computeLocalPosition(); 3172 updatePosition(parentPositionX, parentPositionY); 3173 } else { 3174 hide(); 3175 } 3176 } 3177 3178 public boolean isShowing() { 3179 return mPopupWindow.isShowing(); 3180 } 3181 } 3182 3183 private static final class SuggestionInfo { 3184 // Range of actual suggestion within mText 3185 int mSuggestionStart, mSuggestionEnd; 3186 3187 // The SuggestionSpan that this TextView represents 3188 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3189 3190 // The index of this suggestion inside suggestionSpan 3191 int mSuggestionIndex; 3192 3193 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3194 3195 void clear() { 3196 mSuggestionSpanInfo.clear(); 3197 mText.clear(); 3198 } 3199 3200 // Utility method to set attributes about a SuggestionSpan. 3201 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3202 mSuggestionSpanInfo.mSuggestionSpan = span; 3203 mSuggestionSpanInfo.mSpanStart = spanStart; 3204 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3205 } 3206 } 3207 3208 private static final class SuggestionSpanInfo { 3209 // The SuggestionSpan; 3210 @Nullable 3211 SuggestionSpan mSuggestionSpan; 3212 3213 // The SuggestionSpan start position 3214 int mSpanStart; 3215 3216 // The SuggestionSpan end position 3217 int mSpanEnd; 3218 3219 void clear() { 3220 mSuggestionSpan = null; 3221 } 3222 } 3223 3224 private class SuggestionHelper { 3225 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3226 new SuggestionSpanComparator(); 3227 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3228 new HashMap<SuggestionSpan, Integer>(); 3229 3230 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3231 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3232 final int flag1 = span1.getFlags(); 3233 final int flag2 = span2.getFlags(); 3234 if (flag1 != flag2) { 3235 // The order here should match what is used in updateDrawState 3236 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3237 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3238 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3239 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3240 if (easy1 && !misspelled1) return -1; 3241 if (easy2 && !misspelled2) return 1; 3242 if (misspelled1) return -1; 3243 if (misspelled2) return 1; 3244 } 3245 3246 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3247 } 3248 } 3249 3250 /** 3251 * Returns the suggestion spans that cover the current cursor position. The suggestion 3252 * spans are sorted according to the length of text that they are attached to. 3253 */ 3254 private SuggestionSpan[] getSortedSuggestionSpans() { 3255 int pos = mTextView.getSelectionStart(); 3256 Spannable spannable = (Spannable) mTextView.getText(); 3257 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3258 3259 mSpansLengths.clear(); 3260 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3261 int start = spannable.getSpanStart(suggestionSpan); 3262 int end = spannable.getSpanEnd(suggestionSpan); 3263 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3264 } 3265 3266 // The suggestions are sorted according to their types (easy correction first, then 3267 // misspelled) and to the length of the text that they cover (shorter first). 3268 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3269 mSpansLengths.clear(); 3270 3271 return suggestionSpans; 3272 } 3273 3274 /** 3275 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3276 * position. 3277 * 3278 * @param suggestionInfos SuggestionInfo array the results will be set. 3279 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3280 * @return the number of suggestions actually fetched. 3281 */ 3282 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3283 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3284 final Spannable spannable = (Spannable) mTextView.getText(); 3285 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3286 final int nbSpans = suggestionSpans.length; 3287 if (nbSpans == 0) return 0; 3288 3289 int numberOfSuggestions = 0; 3290 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3291 final int spanStart = spannable.getSpanStart(suggestionSpan); 3292 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3293 3294 if (misspelledSpanInfo != null 3295 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3296 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3297 misspelledSpanInfo.mSpanStart = spanStart; 3298 misspelledSpanInfo.mSpanEnd = spanEnd; 3299 } 3300 3301 final String[] suggestions = suggestionSpan.getSuggestions(); 3302 final int nbSuggestions = suggestions.length; 3303 suggestionLoop: 3304 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3305 final String suggestion = suggestions[suggestionIndex]; 3306 for (int i = 0; i < numberOfSuggestions; i++) { 3307 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3308 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3309 final int otherSpanStart = 3310 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3311 final int otherSpanEnd = 3312 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3313 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3314 continue suggestionLoop; 3315 } 3316 } 3317 } 3318 3319 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3320 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3321 suggestionInfo.mSuggestionIndex = suggestionIndex; 3322 suggestionInfo.mSuggestionStart = 0; 3323 suggestionInfo.mSuggestionEnd = suggestion.length(); 3324 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3325 numberOfSuggestions++; 3326 if (numberOfSuggestions >= suggestionInfos.length) { 3327 return numberOfSuggestions; 3328 } 3329 } 3330 } 3331 return numberOfSuggestions; 3332 } 3333 } 3334 3335 @VisibleForTesting 3336 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3337 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3338 3339 // Key of intent extras for inserting new word into user dictionary. 3340 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3341 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3342 3343 private SuggestionInfo[] mSuggestionInfos; 3344 private int mNumberOfSuggestions; 3345 private boolean mCursorWasVisibleBeforeSuggestions; 3346 private boolean mIsShowingUp = false; 3347 private SuggestionAdapter mSuggestionsAdapter; 3348 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3349 private TextView mAddToDictionaryButton; 3350 private TextView mDeleteButton; 3351 private ListView mSuggestionListView; 3352 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3353 private int mContainerMarginWidth; 3354 private int mContainerMarginTop; 3355 private LinearLayout mContainerView; 3356 private Context mContext; // TODO: Make mContext final. 3357 3358 private class CustomPopupWindow extends PopupWindow { 3359 3360 @Override 3361 public void dismiss() { 3362 if (!isShowing()) { 3363 return; 3364 } 3365 super.dismiss(); 3366 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3367 3368 // Safe cast since show() checks that mTextView.getText() is an Editable 3369 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3370 3371 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3372 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3373 getInsertionController().show(); 3374 } 3375 } 3376 } 3377 3378 public SuggestionsPopupWindow() { 3379 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3380 } 3381 3382 @Override 3383 protected void setUp() { 3384 mContext = applyDefaultTheme(mTextView.getContext()); 3385 mHighlightSpan = new TextAppearanceSpan(mContext, 3386 mTextView.mTextEditSuggestionHighlightStyle); 3387 } 3388 3389 private Context applyDefaultTheme(Context originalContext) { 3390 TypedArray a = originalContext.obtainStyledAttributes( 3391 new int[]{com.android.internal.R.attr.isLightTheme}); 3392 boolean isLightTheme = a.getBoolean(0, true); 3393 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3394 : R.style.ThemeOverlay_Material_Dark; 3395 a.recycle(); 3396 return new ContextThemeWrapper(originalContext, themeId); 3397 } 3398 3399 @Override 3400 protected void createPopupWindow() { 3401 mPopupWindow = new CustomPopupWindow(); 3402 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3403 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3404 mPopupWindow.setFocusable(true); 3405 mPopupWindow.setClippingEnabled(false); 3406 } 3407 3408 @Override 3409 protected void initContentView() { 3410 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3411 Context.LAYOUT_INFLATER_SERVICE); 3412 mContentView = (ViewGroup) inflater.inflate( 3413 mTextView.mTextEditSuggestionContainerLayout, null); 3414 3415 mContainerView = (LinearLayout) mContentView.findViewById( 3416 com.android.internal.R.id.suggestionWindowContainer); 3417 ViewGroup.MarginLayoutParams lp = 3418 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3419 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3420 mContainerMarginTop = lp.topMargin; 3421 mClippingLimitLeft = lp.leftMargin; 3422 mClippingLimitRight = lp.rightMargin; 3423 3424 mSuggestionListView = (ListView) mContentView.findViewById( 3425 com.android.internal.R.id.suggestionContainer); 3426 3427 mSuggestionsAdapter = new SuggestionAdapter(); 3428 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3429 mSuggestionListView.setOnItemClickListener(this); 3430 3431 // Inflate the suggestion items once and for all. 3432 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3433 for (int i = 0; i < mSuggestionInfos.length; i++) { 3434 mSuggestionInfos[i] = new SuggestionInfo(); 3435 } 3436 3437 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3438 com.android.internal.R.id.addToDictionaryButton); 3439 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3440 public void onClick(View v) { 3441 final SuggestionSpan misspelledSpan = 3442 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3443 if (misspelledSpan == null) { 3444 // Span has been removed. 3445 return; 3446 } 3447 final Editable editable = (Editable) mTextView.getText(); 3448 final int spanStart = editable.getSpanStart(misspelledSpan); 3449 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3450 if (spanStart < 0 || spanEnd <= spanStart) { 3451 return; 3452 } 3453 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3454 3455 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3456 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3457 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3458 mTextView.getTextServicesLocale().toString()); 3459 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3460 mTextView.getContext().startActivity(intent); 3461 // There is no way to know if the word was indeed added. Re-check. 3462 // TODO The ExtractEditText should remove the span in the original text instead 3463 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3464 Selection.setSelection(editable, spanEnd); 3465 updateSpellCheckSpans(spanStart, spanEnd, false); 3466 hideWithCleanUp(); 3467 } 3468 }); 3469 3470 mDeleteButton = (TextView) mContentView.findViewById( 3471 com.android.internal.R.id.deleteButton); 3472 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3473 public void onClick(View v) { 3474 final Editable editable = (Editable) mTextView.getText(); 3475 3476 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3477 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3478 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3479 // Do not leave two adjacent spaces after deletion, or one at beginning of 3480 // text 3481 if (spanUnionEnd < editable.length() 3482 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3483 && (spanUnionStart == 0 3484 || Character.isSpaceChar( 3485 editable.charAt(spanUnionStart - 1)))) { 3486 spanUnionEnd = spanUnionEnd + 1; 3487 } 3488 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3489 } 3490 hideWithCleanUp(); 3491 } 3492 }); 3493 3494 } 3495 3496 public boolean isShowingUp() { 3497 return mIsShowingUp; 3498 } 3499 3500 public void onParentLostFocus() { 3501 mIsShowingUp = false; 3502 } 3503 3504 private class SuggestionAdapter extends BaseAdapter { 3505 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3506 Context.LAYOUT_INFLATER_SERVICE); 3507 3508 @Override 3509 public int getCount() { 3510 return mNumberOfSuggestions; 3511 } 3512 3513 @Override 3514 public Object getItem(int position) { 3515 return mSuggestionInfos[position]; 3516 } 3517 3518 @Override 3519 public long getItemId(int position) { 3520 return position; 3521 } 3522 3523 @Override 3524 public View getView(int position, View convertView, ViewGroup parent) { 3525 TextView textView = (TextView) convertView; 3526 3527 if (textView == null) { 3528 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3529 parent, false); 3530 } 3531 3532 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3533 textView.setText(suggestionInfo.mText); 3534 return textView; 3535 } 3536 } 3537 3538 @VisibleForTesting 3539 public ViewGroup getContentViewForTesting() { 3540 return mContentView; 3541 } 3542 3543 @Override 3544 public void show() { 3545 if (!(mTextView.getText() instanceof Editable)) return; 3546 if (extractedTextModeWillBeStarted()) { 3547 return; 3548 } 3549 3550 if (updateSuggestions()) { 3551 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3552 mTextView.setCursorVisible(false); 3553 mIsShowingUp = true; 3554 super.show(); 3555 } 3556 } 3557 3558 @Override 3559 protected void measureContent() { 3560 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3561 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3562 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3563 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3564 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3565 3566 int width = 0; 3567 View view = null; 3568 for (int i = 0; i < mNumberOfSuggestions; i++) { 3569 view = mSuggestionsAdapter.getView(i, view, mContentView); 3570 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3571 view.measure(horizontalMeasure, verticalMeasure); 3572 width = Math.max(width, view.getMeasuredWidth()); 3573 } 3574 3575 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3576 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3577 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3578 } 3579 3580 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3581 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3582 3583 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3584 + mContainerMarginWidth; 3585 3586 // Enforce the width based on actual text widths 3587 mContentView.measure( 3588 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3589 verticalMeasure); 3590 3591 Drawable popupBackground = mPopupWindow.getBackground(); 3592 if (popupBackground != null) { 3593 if (mTempRect == null) mTempRect = new Rect(); 3594 popupBackground.getPadding(mTempRect); 3595 width += mTempRect.left + mTempRect.right; 3596 } 3597 mPopupWindow.setWidth(width); 3598 } 3599 3600 @Override 3601 protected int getTextOffset() { 3602 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3603 } 3604 3605 @Override 3606 protected int getVerticalLocalPosition(int line) { 3607 return mTextView.getLayout().getLineBottom(line) - mContainerMarginTop; 3608 } 3609 3610 @Override 3611 protected int clipVertically(int positionY) { 3612 final int height = mContentView.getMeasuredHeight(); 3613 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3614 return Math.min(positionY, displayMetrics.heightPixels - height); 3615 } 3616 3617 private void hideWithCleanUp() { 3618 for (final SuggestionInfo info : mSuggestionInfos) { 3619 info.clear(); 3620 } 3621 mMisspelledSpanInfo.clear(); 3622 hide(); 3623 } 3624 3625 private boolean updateSuggestions() { 3626 Spannable spannable = (Spannable) mTextView.getText(); 3627 mNumberOfSuggestions = 3628 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3629 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3630 return false; 3631 } 3632 3633 int spanUnionStart = mTextView.getText().length(); 3634 int spanUnionEnd = 0; 3635 3636 for (int i = 0; i < mNumberOfSuggestions; i++) { 3637 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3638 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3639 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3640 } 3641 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3642 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3643 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3644 } 3645 3646 for (int i = 0; i < mNumberOfSuggestions; i++) { 3647 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3648 } 3649 3650 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3651 int addToDictionaryButtonVisibility = View.GONE; 3652 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3653 if (mMisspelledSpanInfo.mSpanStart >= 0 3654 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3655 addToDictionaryButtonVisibility = View.VISIBLE; 3656 } 3657 } 3658 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3659 3660 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3661 final int underlineColor; 3662 if (mNumberOfSuggestions != 0) { 3663 underlineColor = 3664 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3665 } else { 3666 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3667 } 3668 3669 if (underlineColor == 0) { 3670 // Fallback on the default highlight color when the first span does not provide one 3671 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3672 } else { 3673 final float BACKGROUND_TRANSPARENCY = 0.4f; 3674 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3675 mSuggestionRangeSpan.setBackgroundColor( 3676 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3677 } 3678 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3679 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3680 3681 mSuggestionsAdapter.notifyDataSetChanged(); 3682 return true; 3683 } 3684 3685 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3686 int unionEnd) { 3687 final Spannable text = (Spannable) mTextView.getText(); 3688 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3689 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3690 3691 // Adjust the start/end of the suggestion span 3692 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3693 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3694 + suggestionInfo.mText.length(); 3695 3696 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3697 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3698 3699 // Add the text before and after the span. 3700 final String textAsString = text.toString(); 3701 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3702 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3703 } 3704 3705 @Override 3706 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3707 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3708 replaceWithSuggestion(suggestionInfo); 3709 hideWithCleanUp(); 3710 } 3711 } 3712 3713 /** 3714 * An ActionMode Callback class that is used to provide actions while in text insertion or 3715 * selection mode. 3716 * 3717 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3718 * actions, depending on which of these this TextView supports and the current selection. 3719 */ 3720 private class TextActionModeCallback extends ActionMode.Callback2 { 3721 private final Path mSelectionPath = new Path(); 3722 private final RectF mSelectionBounds = new RectF(); 3723 private final boolean mHasSelection; 3724 3725 private int mHandleHeight; 3726 3727 public TextActionModeCallback(boolean hasSelection) { 3728 mHasSelection = hasSelection; 3729 if (mHasSelection) { 3730 SelectionModifierCursorController selectionController = getSelectionController(); 3731 if (selectionController.mStartHandle == null) { 3732 // As these are for initializing selectionController, hide() must be called. 3733 selectionController.initDrawables(); 3734 selectionController.initHandles(); 3735 selectionController.hide(); 3736 } 3737 mHandleHeight = Math.max( 3738 mSelectHandleLeft.getMinimumHeight(), 3739 mSelectHandleRight.getMinimumHeight()); 3740 } else { 3741 InsertionPointCursorController insertionController = getInsertionController(); 3742 if (insertionController != null) { 3743 insertionController.getHandle(); 3744 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3745 } 3746 } 3747 } 3748 3749 @Override 3750 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3751 mode.setTitle(null); 3752 mode.setSubtitle(null); 3753 mode.setTitleOptionalHint(true); 3754 populateMenuWithItems(menu); 3755 3756 Callback customCallback = getCustomCallback(); 3757 if (customCallback != null) { 3758 if (!customCallback.onCreateActionMode(mode, menu)) { 3759 // The custom mode can choose to cancel the action mode, dismiss selection. 3760 Selection.setSelection((Spannable) mTextView.getText(), 3761 mTextView.getSelectionEnd()); 3762 return false; 3763 } 3764 } 3765 3766 if (mTextView.canProcessText()) { 3767 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3768 } 3769 3770 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3771 if (mHasSelection && !mTextView.hasTransientState()) { 3772 mTextView.setHasTransientState(true); 3773 } 3774 return true; 3775 } else { 3776 return false; 3777 } 3778 } 3779 3780 private Callback getCustomCallback() { 3781 return mHasSelection 3782 ? mCustomSelectionActionModeCallback 3783 : mCustomInsertionActionModeCallback; 3784 } 3785 3786 private void populateMenuWithItems(Menu menu) { 3787 if (mTextView.canCut()) { 3788 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3789 com.android.internal.R.string.cut) 3790 .setAlphabeticShortcut('x') 3791 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3792 } 3793 3794 if (mTextView.canCopy()) { 3795 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3796 com.android.internal.R.string.copy) 3797 .setAlphabeticShortcut('c') 3798 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3799 } 3800 3801 if (mTextView.canPaste()) { 3802 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3803 com.android.internal.R.string.paste) 3804 .setAlphabeticShortcut('v') 3805 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3806 } 3807 3808 if (mTextView.canShare()) { 3809 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3810 com.android.internal.R.string.share) 3811 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3812 } 3813 3814 updateSelectAllItem(menu); 3815 updateReplaceItem(menu); 3816 } 3817 3818 @Override 3819 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3820 updateSelectAllItem(menu); 3821 updateReplaceItem(menu); 3822 3823 Callback customCallback = getCustomCallback(); 3824 if (customCallback != null) { 3825 return customCallback.onPrepareActionMode(mode, menu); 3826 } 3827 return true; 3828 } 3829 3830 private void updateSelectAllItem(Menu menu) { 3831 boolean canSelectAll = mTextView.canSelectAllText(); 3832 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3833 if (canSelectAll && !selectAllItemExists) { 3834 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3835 com.android.internal.R.string.selectAll) 3836 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3837 } else if (!canSelectAll && selectAllItemExists) { 3838 menu.removeItem(TextView.ID_SELECT_ALL); 3839 } 3840 } 3841 3842 private void updateReplaceItem(Menu menu) { 3843 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3844 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3845 if (canReplace && !replaceItemExists) { 3846 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3847 com.android.internal.R.string.replace) 3848 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3849 } else if (!canReplace && replaceItemExists) { 3850 menu.removeItem(TextView.ID_REPLACE); 3851 } 3852 } 3853 3854 @Override 3855 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3856 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3857 return true; 3858 } 3859 Callback customCallback = getCustomCallback(); 3860 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3861 return true; 3862 } 3863 return mTextView.onTextContextMenuItem(item.getItemId()); 3864 } 3865 3866 @Override 3867 public void onDestroyActionMode(ActionMode mode) { 3868 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3869 mTextActionMode = null; 3870 Callback customCallback = getCustomCallback(); 3871 if (customCallback != null) { 3872 customCallback.onDestroyActionMode(mode); 3873 } 3874 3875 if (!mPreserveSelection) { 3876 /* 3877 * Leave current selection when we tentatively destroy action mode for the 3878 * selection. If we're detaching from a window, we'll bring back the selection 3879 * mode when (if) we get reattached. 3880 */ 3881 Selection.setSelection((Spannable) mTextView.getText(), 3882 mTextView.getSelectionEnd()); 3883 } 3884 3885 if (mSelectionModifierCursorController != null) { 3886 mSelectionModifierCursorController.hide(); 3887 } 3888 } 3889 3890 @Override 3891 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3892 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3893 super.onGetContentRect(mode, view, outRect); 3894 return; 3895 } 3896 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3897 // We have a selection. 3898 mSelectionPath.reset(); 3899 mTextView.getLayout().getSelectionPath( 3900 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3901 mSelectionPath.computeBounds(mSelectionBounds, true); 3902 mSelectionBounds.bottom += mHandleHeight; 3903 } else if (mCursorCount == 2) { 3904 // We have a split cursor. In this case, we take the rectangle that includes both 3905 // parts of the cursor to ensure we don't obscure either of them. 3906 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3907 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3908 mSelectionBounds.set( 3909 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3910 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3911 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3912 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3913 + mHandleHeight); 3914 } else { 3915 // We have a single cursor. 3916 Layout layout = mTextView.getLayout(); 3917 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 3918 float primaryHorizontal = clampHorizontalPosition(null, 3919 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 3920 mSelectionBounds.set( 3921 primaryHorizontal, 3922 layout.getLineTop(line), 3923 primaryHorizontal, 3924 layout.getLineTop(line + 1) + mHandleHeight); 3925 } 3926 // Take TextView's padding and scroll into account. 3927 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3928 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3929 outRect.set( 3930 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3931 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3932 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3933 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3934 } 3935 } 3936 3937 /** 3938 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3939 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3940 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3941 */ 3942 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3943 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3944 final int[] mTmpIntOffset = new int[2]; 3945 final Matrix mViewToScreenMatrix = new Matrix(); 3946 3947 @Override 3948 public void updatePosition(int parentPositionX, int parentPositionY, 3949 boolean parentPositionChanged, boolean parentScrolled) { 3950 final InputMethodState ims = mInputMethodState; 3951 if (ims == null || ims.mBatchEditNesting > 0) { 3952 return; 3953 } 3954 final InputMethodManager imm = InputMethodManager.peekInstance(); 3955 if (null == imm) { 3956 return; 3957 } 3958 if (!imm.isActive(mTextView)) { 3959 return; 3960 } 3961 // Skip if the IME has not requested the cursor/anchor position. 3962 if (!imm.isCursorAnchorInfoEnabled()) { 3963 return; 3964 } 3965 Layout layout = mTextView.getLayout(); 3966 if (layout == null) { 3967 return; 3968 } 3969 3970 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3971 builder.reset(); 3972 3973 final int selectionStart = mTextView.getSelectionStart(); 3974 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3975 3976 // Construct transformation matrix from view local coordinates to screen coordinates. 3977 mViewToScreenMatrix.set(mTextView.getMatrix()); 3978 mTextView.getLocationOnScreen(mTmpIntOffset); 3979 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3980 builder.setMatrix(mViewToScreenMatrix); 3981 3982 final float viewportToContentHorizontalOffset = 3983 mTextView.viewportToContentHorizontalOffset(); 3984 final float viewportToContentVerticalOffset = 3985 mTextView.viewportToContentVerticalOffset(); 3986 3987 final CharSequence text = mTextView.getText(); 3988 if (text instanceof Spannable) { 3989 final Spannable sp = (Spannable) text; 3990 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3991 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3992 if (composingTextEnd < composingTextStart) { 3993 final int temp = composingTextEnd; 3994 composingTextEnd = composingTextStart; 3995 composingTextStart = temp; 3996 } 3997 final boolean hasComposingText = 3998 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3999 if (hasComposingText) { 4000 final CharSequence composingText = text.subSequence(composingTextStart, 4001 composingTextEnd); 4002 builder.setComposingText(composingTextStart, composingText); 4003 4004 final int minLine = layout.getLineForOffset(composingTextStart); 4005 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 4006 for (int line = minLine; line <= maxLine; ++line) { 4007 final int lineStart = layout.getLineStart(line); 4008 final int lineEnd = layout.getLineEnd(line); 4009 final int offsetStart = Math.max(lineStart, composingTextStart); 4010 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 4011 final boolean ltrLine = 4012 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 4013 final float[] widths = new float[offsetEnd - offsetStart]; 4014 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 4015 final float top = layout.getLineTop(line); 4016 final float bottom = layout.getLineBottom(line); 4017 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 4018 final float charWidth = widths[offset - offsetStart]; 4019 final boolean isRtl = layout.isRtlCharAt(offset); 4020 final float primary = layout.getPrimaryHorizontal(offset); 4021 final float secondary = layout.getSecondaryHorizontal(offset); 4022 // TODO: This doesn't work perfectly for text with custom styles and 4023 // TAB chars. 4024 final float left; 4025 final float right; 4026 if (ltrLine) { 4027 if (isRtl) { 4028 left = secondary - charWidth; 4029 right = secondary; 4030 } else { 4031 left = primary; 4032 right = primary + charWidth; 4033 } 4034 } else { 4035 if (!isRtl) { 4036 left = secondary; 4037 right = secondary + charWidth; 4038 } else { 4039 left = primary - charWidth; 4040 right = primary; 4041 } 4042 } 4043 // TODO: Check top-right and bottom-left as well. 4044 final float localLeft = left + viewportToContentHorizontalOffset; 4045 final float localRight = right + viewportToContentHorizontalOffset; 4046 final float localTop = top + viewportToContentVerticalOffset; 4047 final float localBottom = bottom + viewportToContentVerticalOffset; 4048 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 4049 final boolean isBottomRightVisible = 4050 isPositionVisible(localRight, localBottom); 4051 int characterBoundsFlags = 0; 4052 if (isTopLeftVisible || isBottomRightVisible) { 4053 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4054 } 4055 if (!isTopLeftVisible || !isBottomRightVisible) { 4056 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4057 } 4058 if (isRtl) { 4059 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4060 } 4061 // Here offset is the index in Java chars. 4062 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 4063 localBottom, characterBoundsFlags); 4064 } 4065 } 4066 } 4067 } 4068 4069 // Treat selectionStart as the insertion point. 4070 if (0 <= selectionStart) { 4071 final int offset = selectionStart; 4072 final int line = layout.getLineForOffset(offset); 4073 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4074 + viewportToContentHorizontalOffset; 4075 final float insertionMarkerTop = layout.getLineTop(line) 4076 + viewportToContentVerticalOffset; 4077 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4078 + viewportToContentVerticalOffset; 4079 final float insertionMarkerBottom = layout.getLineBottom(line) 4080 + viewportToContentVerticalOffset; 4081 final boolean isTopVisible = 4082 isPositionVisible(insertionMarkerX, insertionMarkerTop); 4083 final boolean isBottomVisible = 4084 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4085 int insertionMarkerFlags = 0; 4086 if (isTopVisible || isBottomVisible) { 4087 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4088 } 4089 if (!isTopVisible || !isBottomVisible) { 4090 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4091 } 4092 if (layout.isRtlCharAt(offset)) { 4093 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4094 } 4095 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4096 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4097 } 4098 4099 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4100 } 4101 } 4102 4103 @VisibleForTesting 4104 public abstract class HandleView extends View implements TextViewPositionListener { 4105 protected Drawable mDrawable; 4106 protected Drawable mDrawableLtr; 4107 protected Drawable mDrawableRtl; 4108 private final PopupWindow mContainer; 4109 // Position with respect to the parent TextView 4110 private int mPositionX, mPositionY; 4111 private boolean mIsDragging; 4112 // Offset from touch position to mPosition 4113 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4114 protected int mHotspotX; 4115 protected int mHorizontalGravity; 4116 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4117 private float mTouchOffsetY; 4118 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4119 private float mIdealVerticalOffset; 4120 // Parent's (TextView) previous position in window 4121 private int mLastParentX, mLastParentY; 4122 // Parent's (TextView) previous position on screen 4123 private int mLastParentXOnScreen, mLastParentYOnScreen; 4124 // Previous text character offset 4125 protected int mPreviousOffset = -1; 4126 // Previous text character offset 4127 private boolean mPositionHasChanged = true; 4128 // Minimum touch target size for handles 4129 private int mMinSize; 4130 // Indicates the line of text that the handle is on. 4131 protected int mPrevLine = UNSET_LINE; 4132 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4133 // when selecting text when the handles jump to the end / start of words which may be on 4134 // a different line. 4135 protected int mPreviousLineTouched = UNSET_LINE; 4136 4137 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4138 super(mTextView.getContext()); 4139 setId(id); 4140 mContainer = new PopupWindow(mTextView.getContext(), null, 4141 com.android.internal.R.attr.textSelectHandleWindowStyle); 4142 mContainer.setSplitTouchEnabled(true); 4143 mContainer.setClippingEnabled(false); 4144 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4145 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4146 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4147 mContainer.setContentView(this); 4148 4149 mDrawableLtr = drawableLtr; 4150 mDrawableRtl = drawableRtl; 4151 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4152 com.android.internal.R.dimen.text_handle_min_size); 4153 4154 updateDrawable(); 4155 4156 final int handleHeight = getPreferredHeight(); 4157 mTouchOffsetY = -0.3f * handleHeight; 4158 mIdealVerticalOffset = 0.7f * handleHeight; 4159 } 4160 4161 public float getIdealVerticalOffset() { 4162 return mIdealVerticalOffset; 4163 } 4164 4165 protected void updateDrawable() { 4166 if (mIsDragging) { 4167 // Don't update drawable during dragging. 4168 return; 4169 } 4170 final Layout layout = mTextView.getLayout(); 4171 if (layout == null) { 4172 return; 4173 } 4174 final int offset = getCurrentCursorOffset(); 4175 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4176 final Drawable oldDrawable = mDrawable; 4177 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4178 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4179 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4180 if (oldDrawable != mDrawable && isShowing()) { 4181 // Update popup window position. 4182 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4183 - getHorizontalOffset() + getCursorOffset(); 4184 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4185 mPositionHasChanged = true; 4186 updatePosition(mLastParentX, mLastParentY, false, false); 4187 postInvalidate(); 4188 } 4189 } 4190 4191 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4192 protected abstract int getHorizontalGravity(boolean isRtlRun); 4193 4194 // Touch-up filter: number of previous positions remembered 4195 private static final int HISTORY_SIZE = 5; 4196 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4197 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4198 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4199 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4200 private int mPreviousOffsetIndex = 0; 4201 private int mNumberPreviousOffsets = 0; 4202 4203 private void startTouchUpFilter(int offset) { 4204 mNumberPreviousOffsets = 0; 4205 addPositionToTouchUpFilter(offset); 4206 } 4207 4208 private void addPositionToTouchUpFilter(int offset) { 4209 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4210 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4211 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4212 mNumberPreviousOffsets++; 4213 } 4214 4215 private void filterOnTouchUp() { 4216 final long now = SystemClock.uptimeMillis(); 4217 int i = 0; 4218 int index = mPreviousOffsetIndex; 4219 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4220 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4221 i++; 4222 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4223 } 4224 4225 if (i > 0 && i < iMax 4226 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4227 positionAtCursorOffset(mPreviousOffsets[index], false); 4228 } 4229 } 4230 4231 public boolean offsetHasBeenChanged() { 4232 return mNumberPreviousOffsets > 1; 4233 } 4234 4235 @Override 4236 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4237 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4238 } 4239 4240 @Override 4241 public void invalidate() { 4242 super.invalidate(); 4243 if (isShowing()) { 4244 positionAtCursorOffset(getCurrentCursorOffset(), true); 4245 } 4246 }; 4247 4248 private int getPreferredWidth() { 4249 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4250 } 4251 4252 private int getPreferredHeight() { 4253 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4254 } 4255 4256 public void show() { 4257 if (isShowing()) return; 4258 4259 getPositionListener().addSubscriber(this, true /* local position may change */); 4260 4261 // Make sure the offset is always considered new, even when focusing at same position 4262 mPreviousOffset = -1; 4263 positionAtCursorOffset(getCurrentCursorOffset(), false); 4264 } 4265 4266 protected void dismiss() { 4267 mIsDragging = false; 4268 mContainer.dismiss(); 4269 onDetached(); 4270 } 4271 4272 public void hide() { 4273 dismiss(); 4274 4275 getPositionListener().removeSubscriber(this); 4276 } 4277 4278 public boolean isShowing() { 4279 return mContainer.isShowing(); 4280 } 4281 4282 private boolean isVisible() { 4283 // Always show a dragging handle. 4284 if (mIsDragging) { 4285 return true; 4286 } 4287 4288 if (mTextView.isInBatchEditMode()) { 4289 return false; 4290 } 4291 4292 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4293 } 4294 4295 public abstract int getCurrentCursorOffset(); 4296 4297 protected abstract void updateSelection(int offset); 4298 4299 public abstract void updatePosition(float x, float y); 4300 4301 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4302 return layout.isRtlCharAt(offset); 4303 } 4304 4305 @VisibleForTesting 4306 public float getHorizontal(@NonNull Layout layout, int offset) { 4307 return layout.getPrimaryHorizontal(offset); 4308 } 4309 4310 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4311 return mTextView.getOffsetAtCoordinate(line, x); 4312 } 4313 4314 /** 4315 * @param offset Cursor offset. Must be in [-1, length]. 4316 * @param forceUpdatePosition whether to force update the position. This should be true 4317 * when If the parent has been scrolled, for example. 4318 */ 4319 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4320 // A HandleView relies on the layout, which may be nulled by external methods 4321 Layout layout = mTextView.getLayout(); 4322 if (layout == null) { 4323 // Will update controllers' state, hiding them and stopping selection mode if needed 4324 prepareCursorControllers(); 4325 return; 4326 } 4327 layout = mTextView.getLayout(); 4328 4329 boolean offsetChanged = offset != mPreviousOffset; 4330 if (offsetChanged || forceUpdatePosition) { 4331 if (offsetChanged) { 4332 updateSelection(offset); 4333 addPositionToTouchUpFilter(offset); 4334 } 4335 final int line = getLineForOffset(layout, offset); 4336 mPrevLine = line; 4337 4338 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4339 - getHorizontalOffset() + getCursorOffset(); 4340 mPositionY = layout.getLineBottom(line); 4341 4342 // Take TextView's padding and scroll into account. 4343 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4344 mPositionY += mTextView.viewportToContentVerticalOffset(); 4345 4346 mPreviousOffset = offset; 4347 mPositionHasChanged = true; 4348 } 4349 } 4350 4351 /** 4352 * Return the clamped horizontal position for the first cursor. 4353 * 4354 * @param layout Text layout. 4355 * @param offset Character offset for the cursor. 4356 * @return The clamped horizontal position for the cursor. 4357 */ 4358 int getCursorHorizontalPosition(Layout layout, int offset) { 4359 return (int) (getHorizontal(layout, offset) - 0.5f); 4360 } 4361 4362 /** 4363 * @param layout Text layout. 4364 * @param offset Character offset for the cursor. 4365 * @return The line the cursor should be at. 4366 */ 4367 int getLineForOffset(Layout layout, int offset) { 4368 return layout.getLineForOffset(offset); 4369 } 4370 4371 @Override 4372 public void updatePosition(int parentPositionX, int parentPositionY, 4373 boolean parentPositionChanged, boolean parentScrolled) { 4374 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 4375 if (parentPositionChanged || mPositionHasChanged) { 4376 if (mIsDragging) { 4377 // Update touchToWindow offset in case of parent scrolling while dragging 4378 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4379 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4380 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4381 mLastParentX = parentPositionX; 4382 mLastParentY = parentPositionY; 4383 } 4384 4385 onHandleMoved(); 4386 } 4387 4388 if (isVisible()) { 4389 // Transform to the window coordinates to follow the view tranformation. 4390 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4391 mTextView.transformFromViewToWindowSpace(pts); 4392 pts[0] -= mHotspotX + getHorizontalOffset(); 4393 4394 if (isShowing()) { 4395 mContainer.update(pts[0], pts[1], -1, -1); 4396 } else { 4397 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4398 } 4399 } else { 4400 if (isShowing()) { 4401 dismiss(); 4402 } 4403 } 4404 4405 mPositionHasChanged = false; 4406 } 4407 } 4408 4409 @Override 4410 protected void onDraw(Canvas c) { 4411 final int drawWidth = mDrawable.getIntrinsicWidth(); 4412 final int left = getHorizontalOffset(); 4413 4414 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4415 mDrawable.draw(c); 4416 } 4417 4418 private int getHorizontalOffset() { 4419 final int width = getPreferredWidth(); 4420 final int drawWidth = mDrawable.getIntrinsicWidth(); 4421 final int left; 4422 switch (mHorizontalGravity) { 4423 case Gravity.LEFT: 4424 left = 0; 4425 break; 4426 default: 4427 case Gravity.CENTER: 4428 left = (width - drawWidth) / 2; 4429 break; 4430 case Gravity.RIGHT: 4431 left = width - drawWidth; 4432 break; 4433 } 4434 return left; 4435 } 4436 4437 protected int getCursorOffset() { 4438 return 0; 4439 } 4440 4441 @Override 4442 public boolean onTouchEvent(MotionEvent ev) { 4443 updateFloatingToolbarVisibility(ev); 4444 4445 switch (ev.getActionMasked()) { 4446 case MotionEvent.ACTION_DOWN: { 4447 startTouchUpFilter(getCurrentCursorOffset()); 4448 4449 final PositionListener positionListener = getPositionListener(); 4450 mLastParentX = positionListener.getPositionX(); 4451 mLastParentY = positionListener.getPositionY(); 4452 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4453 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4454 4455 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4456 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4457 mTouchToWindowOffsetX = xInWindow - mPositionX; 4458 mTouchToWindowOffsetY = yInWindow - mPositionY; 4459 4460 mIsDragging = true; 4461 mPreviousLineTouched = UNSET_LINE; 4462 break; 4463 } 4464 4465 case MotionEvent.ACTION_MOVE: { 4466 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4467 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4468 4469 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4470 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4471 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4472 float newVerticalOffset; 4473 if (previousVerticalOffset < mIdealVerticalOffset) { 4474 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4475 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4476 } else { 4477 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4478 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4479 } 4480 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4481 4482 final float newPosX = 4483 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4484 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4485 4486 updatePosition(newPosX, newPosY); 4487 break; 4488 } 4489 4490 case MotionEvent.ACTION_UP: 4491 filterOnTouchUp(); 4492 mIsDragging = false; 4493 updateDrawable(); 4494 break; 4495 4496 case MotionEvent.ACTION_CANCEL: 4497 mIsDragging = false; 4498 updateDrawable(); 4499 break; 4500 } 4501 return true; 4502 } 4503 4504 public boolean isDragging() { 4505 return mIsDragging; 4506 } 4507 4508 void onHandleMoved() {} 4509 4510 public void onDetached() {} 4511 } 4512 4513 private class InsertionHandleView extends HandleView { 4514 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4515 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4516 4517 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4518 private float mDownPositionX, mDownPositionY; 4519 private Runnable mHider; 4520 4521 public InsertionHandleView(Drawable drawable) { 4522 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4523 } 4524 4525 @Override 4526 public void show() { 4527 super.show(); 4528 4529 final long durationSinceCutOrCopy = 4530 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4531 4532 // Cancel the single tap delayed runnable. 4533 if (mInsertionActionModeRunnable != null 4534 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4535 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4536 || isCursorInsideEasyCorrectionSpan())) { 4537 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4538 } 4539 4540 // Prepare and schedule the single tap runnable to run exactly after the double tap 4541 // timeout has passed. 4542 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4543 && !isCursorInsideEasyCorrectionSpan() 4544 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4545 if (mTextActionMode == null) { 4546 if (mInsertionActionModeRunnable == null) { 4547 mInsertionActionModeRunnable = new Runnable() { 4548 @Override 4549 public void run() { 4550 startInsertionActionMode(); 4551 } 4552 }; 4553 } 4554 mTextView.postDelayed( 4555 mInsertionActionModeRunnable, 4556 ViewConfiguration.getDoubleTapTimeout() + 1); 4557 } 4558 4559 } 4560 4561 hideAfterDelay(); 4562 } 4563 4564 private void hideAfterDelay() { 4565 if (mHider == null) { 4566 mHider = new Runnable() { 4567 public void run() { 4568 hide(); 4569 } 4570 }; 4571 } else { 4572 removeHiderCallback(); 4573 } 4574 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4575 } 4576 4577 private void removeHiderCallback() { 4578 if (mHider != null) { 4579 mTextView.removeCallbacks(mHider); 4580 } 4581 } 4582 4583 @Override 4584 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4585 return drawable.getIntrinsicWidth() / 2; 4586 } 4587 4588 @Override 4589 protected int getHorizontalGravity(boolean isRtlRun) { 4590 return Gravity.CENTER_HORIZONTAL; 4591 } 4592 4593 @Override 4594 protected int getCursorOffset() { 4595 int offset = super.getCursorOffset(); 4596 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4597 if (cursor != null) { 4598 cursor.getPadding(mTempRect); 4599 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4600 } 4601 return offset; 4602 } 4603 4604 @Override 4605 int getCursorHorizontalPosition(Layout layout, int offset) { 4606 final Drawable drawable = mCursorCount > 0 ? mCursorDrawable[0] : null; 4607 if (drawable != null) { 4608 final float horizontal = getHorizontal(layout, offset); 4609 return clampHorizontalPosition(drawable, horizontal) + mTempRect.left; 4610 } 4611 return super.getCursorHorizontalPosition(layout, offset); 4612 } 4613 4614 @Override 4615 public boolean onTouchEvent(MotionEvent ev) { 4616 final boolean result = super.onTouchEvent(ev); 4617 4618 switch (ev.getActionMasked()) { 4619 case MotionEvent.ACTION_DOWN: 4620 mDownPositionX = ev.getRawX(); 4621 mDownPositionY = ev.getRawY(); 4622 break; 4623 4624 case MotionEvent.ACTION_UP: 4625 if (!offsetHasBeenChanged()) { 4626 final float deltaX = mDownPositionX - ev.getRawX(); 4627 final float deltaY = mDownPositionY - ev.getRawY(); 4628 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4629 4630 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4631 mTextView.getContext()); 4632 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4633 4634 if (distanceSquared < touchSlop * touchSlop) { 4635 // Tapping on the handle toggles the insertion action mode. 4636 if (mTextActionMode != null) { 4637 stopTextActionMode(); 4638 } else { 4639 startInsertionActionMode(); 4640 } 4641 } 4642 } else { 4643 if (mTextActionMode != null) { 4644 mTextActionMode.invalidateContentRect(); 4645 } 4646 } 4647 hideAfterDelay(); 4648 break; 4649 4650 case MotionEvent.ACTION_CANCEL: 4651 hideAfterDelay(); 4652 break; 4653 4654 default: 4655 break; 4656 } 4657 4658 return result; 4659 } 4660 4661 @Override 4662 public int getCurrentCursorOffset() { 4663 return mTextView.getSelectionStart(); 4664 } 4665 4666 @Override 4667 public void updateSelection(int offset) { 4668 Selection.setSelection((Spannable) mTextView.getText(), offset); 4669 } 4670 4671 @Override 4672 public void updatePosition(float x, float y) { 4673 Layout layout = mTextView.getLayout(); 4674 int offset; 4675 if (layout != null) { 4676 if (mPreviousLineTouched == UNSET_LINE) { 4677 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4678 } 4679 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4680 offset = getOffsetAtCoordinate(layout, currLine, x); 4681 mPreviousLineTouched = currLine; 4682 } else { 4683 offset = -1; 4684 } 4685 positionAtCursorOffset(offset, false); 4686 if (mTextActionMode != null) { 4687 mTextActionMode.invalidate(); 4688 } 4689 } 4690 4691 @Override 4692 void onHandleMoved() { 4693 super.onHandleMoved(); 4694 removeHiderCallback(); 4695 } 4696 4697 @Override 4698 public void onDetached() { 4699 super.onDetached(); 4700 removeHiderCallback(); 4701 } 4702 } 4703 4704 @Retention(RetentionPolicy.SOURCE) 4705 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4706 public @interface HandleType {} 4707 public static final int HANDLE_TYPE_SELECTION_START = 0; 4708 public static final int HANDLE_TYPE_SELECTION_END = 1; 4709 4710 private class SelectionHandleView extends HandleView { 4711 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4712 // end (HANDLE_TYPE_SELECTION_END). 4713 @HandleType 4714 private final int mHandleType; 4715 // Indicates whether the cursor is making adjustments within a word. 4716 private boolean mInWord = false; 4717 // Difference between touch position and word boundary position. 4718 private float mTouchWordDelta; 4719 // X value of the previous updatePosition call. 4720 private float mPrevX; 4721 // Indicates if the handle has moved a boundary between LTR and RTL text. 4722 private boolean mLanguageDirectionChanged = false; 4723 // Distance from edge of horizontally scrolling text view 4724 // to use to switch to character mode. 4725 private final float mTextViewEdgeSlop; 4726 // Used to save text view location. 4727 private final int[] mTextViewLocation = new int[2]; 4728 4729 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4730 @HandleType int handleType) { 4731 super(drawableLtr, drawableRtl, id); 4732 mHandleType = handleType; 4733 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4734 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4735 } 4736 4737 private boolean isStartHandle() { 4738 return mHandleType == HANDLE_TYPE_SELECTION_START; 4739 } 4740 4741 @Override 4742 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4743 if (isRtlRun == isStartHandle()) { 4744 return drawable.getIntrinsicWidth() / 4; 4745 } else { 4746 return (drawable.getIntrinsicWidth() * 3) / 4; 4747 } 4748 } 4749 4750 @Override 4751 protected int getHorizontalGravity(boolean isRtlRun) { 4752 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4753 } 4754 4755 @Override 4756 public int getCurrentCursorOffset() { 4757 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4758 } 4759 4760 @Override 4761 protected void updateSelection(int offset) { 4762 if (isStartHandle()) { 4763 Selection.setSelection((Spannable) mTextView.getText(), offset, 4764 mTextView.getSelectionEnd()); 4765 } else { 4766 Selection.setSelection((Spannable) mTextView.getText(), 4767 mTextView.getSelectionStart(), offset); 4768 } 4769 updateDrawable(); 4770 if (mTextActionMode != null) { 4771 mTextActionMode.invalidate(); 4772 } 4773 } 4774 4775 @Override 4776 public void updatePosition(float x, float y) { 4777 final Layout layout = mTextView.getLayout(); 4778 if (layout == null) { 4779 // HandleView will deal appropriately in positionAtCursorOffset when 4780 // layout is null. 4781 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y)); 4782 return; 4783 } 4784 4785 if (mPreviousLineTouched == UNSET_LINE) { 4786 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4787 } 4788 4789 boolean positionCursor = false; 4790 final int anotherHandleOffset = 4791 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4792 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4793 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4794 4795 if (isStartHandle() && initialOffset >= anotherHandleOffset 4796 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4797 // Handles have crossed, bound it to the first selected line and 4798 // adjust by word / char as normal. 4799 currLine = getLineForOffset(layout, anotherHandleOffset, !isStartHandle()); 4800 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4801 } 4802 4803 int offset = initialOffset; 4804 final int wordEnd = getWordEnd(offset); 4805 final int wordStart = getWordStart(offset); 4806 4807 if (mPrevX == UNSET_X_VALUE) { 4808 mPrevX = x; 4809 } 4810 4811 final int currentOffset = getCurrentCursorOffset(); 4812 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4813 final boolean atRtl = isAtRtlRun(layout, offset); 4814 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4815 4816 // We can't determine if the user is expanding or shrinking the selection if they're 4817 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4818 // the cursor at the current position. 4819 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4820 // We're on a boundary or this is the first direction change -- just update 4821 // to the current position. 4822 mLanguageDirectionChanged = true; 4823 mTouchWordDelta = 0.0f; 4824 positionAndAdjustForCrossingHandles(offset); 4825 return; 4826 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4827 // We've just moved past the boundary so update the position. After this we can 4828 // figure out if the user is expanding or shrinking to go by word or character. 4829 positionAndAdjustForCrossingHandles(offset); 4830 mTouchWordDelta = 0.0f; 4831 mLanguageDirectionChanged = false; 4832 return; 4833 } 4834 4835 boolean isExpanding; 4836 final float xDiff = x - mPrevX; 4837 if (isStartHandle()) { 4838 isExpanding = currLine < mPreviousLineTouched; 4839 } else { 4840 isExpanding = currLine > mPreviousLineTouched; 4841 } 4842 if (atRtl == isStartHandle()) { 4843 isExpanding |= xDiff > 0; 4844 } else { 4845 isExpanding |= xDiff < 0; 4846 } 4847 4848 if (mTextView.getHorizontallyScrolling()) { 4849 if (positionNearEdgeOfScrollingView(x, atRtl) 4850 && ((isStartHandle() && mTextView.getScrollX() != 0) 4851 || (!isStartHandle() 4852 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4853 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4854 || (!isStartHandle() && offset > currentOffset))) 4855 || !isExpanding)) { 4856 // If we're expanding ensure that the offset is actually expanding compared to 4857 // the current offset, if the handle snapped to the word, the finger position 4858 // may be out of sync and we don't want the selection to jump back. 4859 mTouchWordDelta = 0.0f; 4860 final int nextOffset = (atRtl == isStartHandle()) 4861 ? layout.getOffsetToRightOf(mPreviousOffset) 4862 : layout.getOffsetToLeftOf(mPreviousOffset); 4863 positionAndAdjustForCrossingHandles(nextOffset); 4864 return; 4865 } 4866 } 4867 4868 if (isExpanding) { 4869 // User is increasing the selection. 4870 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4871 final boolean atLineBoundary = layout.getLineStart(currLine) == offset 4872 || layout.getLineEnd(currLine) == offset; 4873 final boolean atWordBoundary = getWordIteratorWithText().isBoundary(offset); 4874 final boolean snapToWord = !(atLineBoundary && atWordBoundary) 4875 && (!mInWord 4876 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4877 && atRtl == isAtRtlRun(layout, wordBoundary); 4878 if (snapToWord) { 4879 // Sometimes words can be broken across lines (Chinese, hyphenation). 4880 // We still snap to the word boundary but we only use the letters on the 4881 // current line to determine if the user is far enough into the word to snap. 4882 if (getLineForOffset(layout, wordBoundary) != currLine) { 4883 wordBoundary = isStartHandle() 4884 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4885 } 4886 final int offsetThresholdToSnap = isStartHandle() 4887 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4888 : wordStart + ((wordBoundary - wordStart) / 2); 4889 if (isStartHandle() 4890 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4891 // User is far enough into the word or on a different line so we expand by 4892 // word. 4893 offset = wordStart; 4894 } else if (!isStartHandle() 4895 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4896 // User is far enough into the word or on a different line so we expand by 4897 // word. 4898 offset = wordEnd; 4899 } else { 4900 offset = mPreviousOffset; 4901 } 4902 } 4903 if ((isStartHandle() && offset < initialOffset) 4904 || (!isStartHandle() && offset > initialOffset)) { 4905 final float adjustedX = getHorizontal(layout, offset); 4906 mTouchWordDelta = 4907 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4908 } else { 4909 mTouchWordDelta = 0.0f; 4910 } 4911 positionCursor = true; 4912 } else { 4913 final int adjustedOffset = 4914 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4915 final boolean shrinking = isStartHandle() 4916 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4917 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4918 if (shrinking) { 4919 // User is shrinking the selection. 4920 if (currLine != mPrevLine) { 4921 // We're on a different line, so we'll snap to word boundaries. 4922 offset = isStartHandle() ? wordStart : wordEnd; 4923 if ((isStartHandle() && offset < initialOffset) 4924 || (!isStartHandle() && offset > initialOffset)) { 4925 final float adjustedX = getHorizontal(layout, offset); 4926 mTouchWordDelta = 4927 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4928 } else { 4929 mTouchWordDelta = 0.0f; 4930 } 4931 } else { 4932 offset = adjustedOffset; 4933 } 4934 positionCursor = true; 4935 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4936 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4937 // Handle has jumped to the word boundary, and the user is moving 4938 // their finger towards the handle, the delta should be updated. 4939 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4940 - getHorizontal(layout, mPreviousOffset); 4941 } 4942 } 4943 4944 if (positionCursor) { 4945 mPreviousLineTouched = currLine; 4946 positionAndAdjustForCrossingHandles(offset); 4947 } 4948 mPrevX = x; 4949 } 4950 4951 @Override 4952 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition) { 4953 super.positionAtCursorOffset(offset, forceUpdatePosition); 4954 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 4955 } 4956 4957 @Override 4958 public boolean onTouchEvent(MotionEvent event) { 4959 boolean superResult = super.onTouchEvent(event); 4960 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 4961 // Reset the touch word offset and x value when the user 4962 // re-engages the handle. 4963 mTouchWordDelta = 0.0f; 4964 mPrevX = UNSET_X_VALUE; 4965 } 4966 return superResult; 4967 } 4968 4969 private void positionAndAdjustForCrossingHandles(int offset) { 4970 final int anotherHandleOffset = 4971 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4972 if ((isStartHandle() && offset >= anotherHandleOffset) 4973 || (!isStartHandle() && offset <= anotherHandleOffset)) { 4974 mTouchWordDelta = 0.0f; 4975 final Layout layout = mTextView.getLayout(); 4976 if (layout != null && offset != anotherHandleOffset) { 4977 final float horiz = getHorizontal(layout, offset); 4978 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 4979 !isStartHandle()); 4980 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 4981 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 4982 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 4983 // This handle passes another one as it crossed a direction boundary. 4984 // Don't minimize the selection, but keep the handle at the run boundary. 4985 final int currentOffset = getCurrentCursorOffset(); 4986 final int offsetToGetRunRange = isStartHandle() 4987 ? currentOffset : Math.max(currentOffset - 1, 0); 4988 final long range = layout.getRunRange(offsetToGetRunRange); 4989 if (isStartHandle()) { 4990 offset = TextUtils.unpackRangeStartFromLong(range); 4991 } else { 4992 offset = TextUtils.unpackRangeEndFromLong(range); 4993 } 4994 positionAtCursorOffset(offset, false); 4995 return; 4996 } 4997 } 4998 // Handles can not cross and selection is at least one character. 4999 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5000 } 5001 positionAtCursorOffset(offset, false); 5002 } 5003 5004 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5005 mTextView.getLocationOnScreen(mTextViewLocation); 5006 boolean nearEdge; 5007 if (atRtl == isStartHandle()) { 5008 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5009 - mTextView.getPaddingRight(); 5010 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5011 } else { 5012 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5013 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5014 } 5015 return nearEdge; 5016 } 5017 5018 @Override 5019 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5020 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5021 return layout.isRtlCharAt(offsetToCheck); 5022 } 5023 5024 @Override 5025 public float getHorizontal(@NonNull Layout layout, int offset) { 5026 return getHorizontal(layout, offset, isStartHandle()); 5027 } 5028 5029 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5030 final int line = getLineForOffset(layout, offset); 5031 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5032 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5033 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5034 return (isRtlChar == isRtlParagraph) 5035 ? layout.getPrimaryHorizontal(offset, false, startHandle) 5036 : layout.getSecondaryHorizontal(offset, false, startHandle); 5037 } 5038 5039 @Override 5040 public int getLineForOffset(@NonNull Layout layout, int offset) { 5041 return getLineForOffset(layout, offset, isStartHandle()); 5042 } 5043 5044 private int getLineForOffset(@NonNull Layout layout, int offset, boolean startHandle) { 5045 final int line = layout.getLineForOffset(offset); 5046 if (!startHandle && line > 0 && layout.getLineStart(line) == offset 5047 && mTextView.getText().charAt(offset - 1) != '\n') { 5048 // If end handle is at a line break in a paragraph, the handle should be at the 5049 // previous line. 5050 return line - 1; 5051 } 5052 return line; 5053 } 5054 5055 @Override 5056 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5057 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5058 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5059 if (!layout.isLevelBoundary(primaryOffset)) { 5060 return primaryOffset; 5061 } 5062 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5063 final int currentOffset = getCurrentCursorOffset(); 5064 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5065 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5066 if (primaryDiff < secondaryDiff) { 5067 return primaryOffset; 5068 } else if (primaryDiff > secondaryDiff) { 5069 return secondaryOffset; 5070 } else { 5071 final int offsetToCheck = isStartHandle() 5072 ? currentOffset : Math.max(currentOffset - 1, 0); 5073 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5074 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5075 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5076 } 5077 } 5078 } 5079 5080 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5081 final int trueLine = mTextView.getLineAtCoordinate(y); 5082 if (layout == null || prevLine > layout.getLineCount() 5083 || layout.getLineCount() <= 0 || prevLine < 0) { 5084 // Invalid parameters, just return whatever line is at y. 5085 return trueLine; 5086 } 5087 5088 if (Math.abs(trueLine - prevLine) >= 2) { 5089 // Only stick to lines if we're within a line of the previous selection. 5090 return trueLine; 5091 } 5092 5093 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5094 final int lineCount = layout.getLineCount(); 5095 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5096 5097 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5098 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5099 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5100 5101 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5102 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5103 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5104 5105 // Determine if we've moved lines based on y position and previous line. 5106 int currLine; 5107 if (y <= yTopBound) { 5108 currLine = Math.max(prevLine - 1, 0); 5109 } else if (y >= yBottomBound) { 5110 currLine = Math.min(prevLine + 1, lineCount - 1); 5111 } else { 5112 currLine = prevLine; 5113 } 5114 return currLine; 5115 } 5116 5117 /** 5118 * A CursorController instance can be used to control a cursor in the text. 5119 */ 5120 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5121 /** 5122 * Makes the cursor controller visible on screen. 5123 * See also {@link #hide()}. 5124 */ 5125 public void show(); 5126 5127 /** 5128 * Hide the cursor controller from screen. 5129 * See also {@link #show()}. 5130 */ 5131 public void hide(); 5132 5133 /** 5134 * Called when the view is detached from window. Perform house keeping task, such as 5135 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5136 * preventing the activity from being recycled. 5137 */ 5138 public void onDetached(); 5139 5140 public boolean isCursorBeingModified(); 5141 5142 public boolean isActive(); 5143 } 5144 5145 private class InsertionPointCursorController implements CursorController { 5146 private InsertionHandleView mHandle; 5147 5148 public void show() { 5149 getHandle().show(); 5150 5151 if (mSelectionModifierCursorController != null) { 5152 mSelectionModifierCursorController.hide(); 5153 } 5154 } 5155 5156 public void hide() { 5157 if (mHandle != null) { 5158 mHandle.hide(); 5159 } 5160 } 5161 5162 public void onTouchModeChanged(boolean isInTouchMode) { 5163 if (!isInTouchMode) { 5164 hide(); 5165 } 5166 } 5167 5168 private InsertionHandleView getHandle() { 5169 if (mSelectHandleCenter == null) { 5170 mSelectHandleCenter = mTextView.getContext().getDrawable( 5171 mTextView.mTextSelectHandleRes); 5172 } 5173 if (mHandle == null) { 5174 mHandle = new InsertionHandleView(mSelectHandleCenter); 5175 } 5176 return mHandle; 5177 } 5178 5179 @Override 5180 public void onDetached() { 5181 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5182 observer.removeOnTouchModeChangeListener(this); 5183 5184 if (mHandle != null) mHandle.onDetached(); 5185 } 5186 5187 @Override 5188 public boolean isCursorBeingModified() { 5189 return mHandle != null && mHandle.isDragging(); 5190 } 5191 5192 @Override 5193 public boolean isActive() { 5194 return mHandle != null && mHandle.isShowing(); 5195 } 5196 5197 public void invalidateHandle() { 5198 if (mHandle != null) { 5199 mHandle.invalidate(); 5200 } 5201 } 5202 } 5203 5204 class SelectionModifierCursorController implements CursorController { 5205 // The cursor controller handles, lazily created when shown. 5206 private SelectionHandleView mStartHandle; 5207 private SelectionHandleView mEndHandle; 5208 // The offsets of that last touch down event. Remembered to start selection there. 5209 private int mMinTouchOffset, mMaxTouchOffset; 5210 5211 private float mDownPositionX, mDownPositionY; 5212 private boolean mGestureStayedInTapRegion; 5213 5214 // Where the user first starts the drag motion. 5215 private int mStartOffset = -1; 5216 5217 private boolean mHaventMovedEnoughToStartDrag; 5218 // The line that a selection happened most recently with the drag accelerator. 5219 private int mLineSelectionIsOn = -1; 5220 // Whether the drag accelerator has selected past the initial line. 5221 private boolean mSwitchedLines = false; 5222 5223 // Indicates the drag accelerator mode that the user is currently using. 5224 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5225 // Drag accelerator is inactive. 5226 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5227 // Character based selection by dragging. Only for mouse. 5228 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5229 // Word based selection by dragging. Enabled after long pressing or double tapping. 5230 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5231 // Paragraph based selection by dragging. Enabled after mouse triple click. 5232 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5233 5234 SelectionModifierCursorController() { 5235 resetTouchOffsets(); 5236 } 5237 5238 public void show() { 5239 if (mTextView.isInBatchEditMode()) { 5240 return; 5241 } 5242 initDrawables(); 5243 initHandles(); 5244 } 5245 5246 private void initDrawables() { 5247 if (mSelectHandleLeft == null) { 5248 mSelectHandleLeft = mTextView.getContext().getDrawable( 5249 mTextView.mTextSelectHandleLeftRes); 5250 } 5251 if (mSelectHandleRight == null) { 5252 mSelectHandleRight = mTextView.getContext().getDrawable( 5253 mTextView.mTextSelectHandleRightRes); 5254 } 5255 } 5256 5257 private void initHandles() { 5258 // Lazy object creation has to be done before updatePosition() is called. 5259 if (mStartHandle == null) { 5260 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5261 com.android.internal.R.id.selection_start_handle, 5262 HANDLE_TYPE_SELECTION_START); 5263 } 5264 if (mEndHandle == null) { 5265 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5266 com.android.internal.R.id.selection_end_handle, 5267 HANDLE_TYPE_SELECTION_END); 5268 } 5269 5270 mStartHandle.show(); 5271 mEndHandle.show(); 5272 5273 hideInsertionPointCursorController(); 5274 } 5275 5276 public void hide() { 5277 if (mStartHandle != null) mStartHandle.hide(); 5278 if (mEndHandle != null) mEndHandle.hide(); 5279 } 5280 5281 public void enterDrag(int dragAcceleratorMode) { 5282 // Just need to init the handles / hide insertion cursor. 5283 show(); 5284 mDragAcceleratorMode = dragAcceleratorMode; 5285 // Start location of selection. 5286 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5287 mLastDownPositionY); 5288 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5289 // Don't show the handles until user has lifted finger. 5290 hide(); 5291 5292 // This stops scrolling parents from intercepting the touch event, allowing 5293 // the user to continue dragging across the screen to select text; TextView will 5294 // scroll as necessary. 5295 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5296 mTextView.cancelLongPress(); 5297 } 5298 5299 public void onTouchEvent(MotionEvent event) { 5300 // This is done even when the View does not have focus, so that long presses can start 5301 // selection and tap can move cursor from this tap position. 5302 final float eventX = event.getX(); 5303 final float eventY = event.getY(); 5304 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5305 switch (event.getActionMasked()) { 5306 case MotionEvent.ACTION_DOWN: 5307 if (extractedTextModeWillBeStarted()) { 5308 // Prevent duplicating the selection handles until the mode starts. 5309 hide(); 5310 } else { 5311 // Remember finger down position, to be able to start selection from there. 5312 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5313 eventX, eventY); 5314 5315 // Double tap detection 5316 if (mGestureStayedInTapRegion) { 5317 if (mTapState == TAP_STATE_DOUBLE_TAP 5318 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5319 final float deltaX = eventX - mDownPositionX; 5320 final float deltaY = eventY - mDownPositionY; 5321 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5322 5323 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5324 mTextView.getContext()); 5325 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5326 boolean stayedInArea = 5327 distanceSquared < doubleTapSlop * doubleTapSlop; 5328 5329 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5330 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5331 selectCurrentWordAndStartDrag(); 5332 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5333 selectCurrentParagraphAndStartDrag(); 5334 } 5335 mDiscardNextActionUp = true; 5336 } 5337 } 5338 } 5339 5340 mDownPositionX = eventX; 5341 mDownPositionY = eventY; 5342 mGestureStayedInTapRegion = true; 5343 mHaventMovedEnoughToStartDrag = true; 5344 } 5345 break; 5346 5347 case MotionEvent.ACTION_POINTER_DOWN: 5348 case MotionEvent.ACTION_POINTER_UP: 5349 // Handle multi-point gestures. Keep min and max offset positions. 5350 // Only activated for devices that correctly handle multi-touch. 5351 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5352 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5353 updateMinAndMaxOffsets(event); 5354 } 5355 break; 5356 5357 case MotionEvent.ACTION_MOVE: 5358 final ViewConfiguration viewConfig = ViewConfiguration.get( 5359 mTextView.getContext()); 5360 final int touchSlop = viewConfig.getScaledTouchSlop(); 5361 5362 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5363 final float deltaX = eventX - mDownPositionX; 5364 final float deltaY = eventY - mDownPositionY; 5365 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5366 5367 if (mGestureStayedInTapRegion) { 5368 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5369 mGestureStayedInTapRegion = 5370 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5371 } 5372 if (mHaventMovedEnoughToStartDrag) { 5373 // We don't start dragging until the user has moved enough. 5374 mHaventMovedEnoughToStartDrag = 5375 distanceSquared <= touchSlop * touchSlop; 5376 } 5377 } 5378 5379 if (isMouse && !isDragAcceleratorActive()) { 5380 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5381 if (mTextView.hasSelection() 5382 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5383 && offset >= mTextView.getSelectionStart() 5384 && offset <= mTextView.getSelectionEnd()) { 5385 startDragAndDrop(); 5386 break; 5387 } 5388 5389 if (mStartOffset != offset) { 5390 // Start character based drag accelerator. 5391 stopTextActionMode(); 5392 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5393 mDiscardNextActionUp = true; 5394 mHaventMovedEnoughToStartDrag = false; 5395 } 5396 } 5397 5398 if (mStartHandle != null && mStartHandle.isShowing()) { 5399 // Don't do the drag if the handles are showing already. 5400 break; 5401 } 5402 5403 updateSelection(event); 5404 break; 5405 5406 case MotionEvent.ACTION_UP: 5407 if (!isDragAcceleratorActive()) { 5408 break; 5409 } 5410 updateSelection(event); 5411 5412 // No longer dragging to select text, let the parent intercept events. 5413 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5414 5415 // No longer the first dragging motion, reset. 5416 resetDragAcceleratorState(); 5417 5418 if (mTextView.hasSelection()) { 5419 startSelectionActionMode(); 5420 } 5421 break; 5422 } 5423 } 5424 5425 private void updateSelection(MotionEvent event) { 5426 if (mTextView.getLayout() != null) { 5427 switch (mDragAcceleratorMode) { 5428 case DRAG_ACCELERATOR_MODE_CHARACTER: 5429 updateCharacterBasedSelection(event); 5430 break; 5431 case DRAG_ACCELERATOR_MODE_WORD: 5432 updateWordBasedSelection(event); 5433 break; 5434 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5435 updateParagraphBasedSelection(event); 5436 break; 5437 } 5438 } 5439 } 5440 5441 /** 5442 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5443 * 5444 * @return true if the drag was started. 5445 */ 5446 private boolean selectCurrentParagraphAndStartDrag() { 5447 if (mInsertionActionModeRunnable != null) { 5448 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5449 } 5450 stopTextActionMode(); 5451 if (!selectCurrentParagraph()) { 5452 return false; 5453 } 5454 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5455 return true; 5456 } 5457 5458 private void updateCharacterBasedSelection(MotionEvent event) { 5459 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5460 Selection.setSelection((Spannable) mTextView.getText(), mStartOffset, offset); 5461 } 5462 5463 private void updateWordBasedSelection(MotionEvent event) { 5464 if (mHaventMovedEnoughToStartDrag) { 5465 return; 5466 } 5467 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5468 final ViewConfiguration viewConfig = ViewConfiguration.get( 5469 mTextView.getContext()); 5470 final float eventX = event.getX(); 5471 final float eventY = event.getY(); 5472 final int currLine; 5473 if (isMouse) { 5474 // No need to offset the y coordinate for mouse input. 5475 currLine = mTextView.getLineAtCoordinate(eventY); 5476 } else { 5477 float y = eventY; 5478 if (mSwitchedLines) { 5479 // Offset the finger by the same vertical offset as the handles. 5480 // This improves visibility of the content being selected by 5481 // shifting the finger below the content, this is applied once 5482 // the user has switched lines. 5483 final int touchSlop = viewConfig.getScaledTouchSlop(); 5484 final float fingerOffset = (mStartHandle != null) 5485 ? mStartHandle.getIdealVerticalOffset() 5486 : touchSlop; 5487 y = eventY - fingerOffset; 5488 } 5489 5490 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5491 y); 5492 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5493 // Break early here, we want to offset the finger position from 5494 // the selection highlight, once the user moved their finger 5495 // to a different line we should apply the offset and *not* switch 5496 // lines until recomputing the position with the finger offset. 5497 mSwitchedLines = true; 5498 return; 5499 } 5500 } 5501 5502 int startOffset; 5503 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5504 // Snap to word boundaries. 5505 if (mStartOffset < offset) { 5506 // Expanding with end handle. 5507 offset = getWordEnd(offset); 5508 startOffset = getWordStart(mStartOffset); 5509 } else { 5510 // Expanding with start handle. 5511 offset = getWordStart(offset); 5512 startOffset = getWordEnd(mStartOffset); 5513 if (startOffset == offset) { 5514 offset = getNextCursorOffset(offset, false); 5515 } 5516 } 5517 mLineSelectionIsOn = currLine; 5518 Selection.setSelection((Spannable) mTextView.getText(), startOffset, offset); 5519 } 5520 5521 private void updateParagraphBasedSelection(MotionEvent event) { 5522 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5523 5524 final int start = Math.min(offset, mStartOffset); 5525 final int end = Math.max(offset, mStartOffset); 5526 final long paragraphsRange = getParagraphsRange(start, end); 5527 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5528 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5529 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5530 } 5531 5532 /** 5533 * @param event 5534 */ 5535 private void updateMinAndMaxOffsets(MotionEvent event) { 5536 int pointerCount = event.getPointerCount(); 5537 for (int index = 0; index < pointerCount; index++) { 5538 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5539 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5540 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5541 } 5542 } 5543 5544 public int getMinTouchOffset() { 5545 return mMinTouchOffset; 5546 } 5547 5548 public int getMaxTouchOffset() { 5549 return mMaxTouchOffset; 5550 } 5551 5552 public void resetTouchOffsets() { 5553 mMinTouchOffset = mMaxTouchOffset = -1; 5554 resetDragAcceleratorState(); 5555 } 5556 5557 private void resetDragAcceleratorState() { 5558 mStartOffset = -1; 5559 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5560 mSwitchedLines = false; 5561 final int selectionStart = mTextView.getSelectionStart(); 5562 final int selectionEnd = mTextView.getSelectionEnd(); 5563 if (selectionStart > selectionEnd) { 5564 Selection.setSelection((Spannable) mTextView.getText(), 5565 selectionEnd, selectionStart); 5566 } 5567 } 5568 5569 /** 5570 * @return true iff this controller is currently used to move the selection start. 5571 */ 5572 public boolean isSelectionStartDragged() { 5573 return mStartHandle != null && mStartHandle.isDragging(); 5574 } 5575 5576 @Override 5577 public boolean isCursorBeingModified() { 5578 return isDragAcceleratorActive() || isSelectionStartDragged() 5579 || (mEndHandle != null && mEndHandle.isDragging()); 5580 } 5581 5582 /** 5583 * @return true if the user is selecting text using the drag accelerator. 5584 */ 5585 public boolean isDragAcceleratorActive() { 5586 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5587 } 5588 5589 public void onTouchModeChanged(boolean isInTouchMode) { 5590 if (!isInTouchMode) { 5591 hide(); 5592 } 5593 } 5594 5595 @Override 5596 public void onDetached() { 5597 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5598 observer.removeOnTouchModeChangeListener(this); 5599 5600 if (mStartHandle != null) mStartHandle.onDetached(); 5601 if (mEndHandle != null) mEndHandle.onDetached(); 5602 } 5603 5604 @Override 5605 public boolean isActive() { 5606 return mStartHandle != null && mStartHandle.isShowing(); 5607 } 5608 5609 public void invalidateHandles() { 5610 if (mStartHandle != null) { 5611 mStartHandle.invalidate(); 5612 } 5613 if (mEndHandle != null) { 5614 mEndHandle.invalidate(); 5615 } 5616 } 5617 } 5618 5619 private class CorrectionHighlighter { 5620 private final Path mPath = new Path(); 5621 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5622 private int mStart, mEnd; 5623 private long mFadingStartTime; 5624 private RectF mTempRectF; 5625 private static final int FADE_OUT_DURATION = 400; 5626 5627 public CorrectionHighlighter() { 5628 mPaint.setCompatibilityScaling( 5629 mTextView.getResources().getCompatibilityInfo().applicationScale); 5630 mPaint.setStyle(Paint.Style.FILL); 5631 } 5632 5633 public void highlight(CorrectionInfo info) { 5634 mStart = info.getOffset(); 5635 mEnd = mStart + info.getNewText().length(); 5636 mFadingStartTime = SystemClock.uptimeMillis(); 5637 5638 if (mStart < 0 || mEnd < 0) { 5639 stopAnimation(); 5640 } 5641 } 5642 5643 public void draw(Canvas canvas, int cursorOffsetVertical) { 5644 if (updatePath() && updatePaint()) { 5645 if (cursorOffsetVertical != 0) { 5646 canvas.translate(0, cursorOffsetVertical); 5647 } 5648 5649 canvas.drawPath(mPath, mPaint); 5650 5651 if (cursorOffsetVertical != 0) { 5652 canvas.translate(0, -cursorOffsetVertical); 5653 } 5654 invalidate(true); // TODO invalidate cursor region only 5655 } else { 5656 stopAnimation(); 5657 invalidate(false); // TODO invalidate cursor region only 5658 } 5659 } 5660 5661 private boolean updatePaint() { 5662 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5663 if (duration > FADE_OUT_DURATION) return false; 5664 5665 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5666 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5667 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5668 + ((int) (highlightColorAlpha * coef) << 24); 5669 mPaint.setColor(color); 5670 return true; 5671 } 5672 5673 private boolean updatePath() { 5674 final Layout layout = mTextView.getLayout(); 5675 if (layout == null) return false; 5676 5677 // Update in case text is edited while the animation is run 5678 final int length = mTextView.getText().length(); 5679 int start = Math.min(length, mStart); 5680 int end = Math.min(length, mEnd); 5681 5682 mPath.reset(); 5683 layout.getSelectionPath(start, end, mPath); 5684 return true; 5685 } 5686 5687 private void invalidate(boolean delayed) { 5688 if (mTextView.getLayout() == null) return; 5689 5690 if (mTempRectF == null) mTempRectF = new RectF(); 5691 mPath.computeBounds(mTempRectF, false); 5692 5693 int left = mTextView.getCompoundPaddingLeft(); 5694 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5695 5696 if (delayed) { 5697 mTextView.postInvalidateOnAnimation( 5698 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5699 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5700 } else { 5701 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5702 (int) mTempRectF.right, (int) mTempRectF.bottom); 5703 } 5704 } 5705 5706 private void stopAnimation() { 5707 Editor.this.mCorrectionHighlighter = null; 5708 } 5709 } 5710 5711 private static class ErrorPopup extends PopupWindow { 5712 private boolean mAbove = false; 5713 private final TextView mView; 5714 private int mPopupInlineErrorBackgroundId = 0; 5715 private int mPopupInlineErrorAboveBackgroundId = 0; 5716 5717 ErrorPopup(TextView v, int width, int height) { 5718 super(v, width, height); 5719 mView = v; 5720 // Make sure the TextView has a background set as it will be used the first time it is 5721 // shown and positioned. Initialized with below background, which should have 5722 // dimensions identical to the above version for this to work (and is more likely). 5723 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5724 com.android.internal.R.styleable.Theme_errorMessageBackground); 5725 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5726 } 5727 5728 void fixDirection(boolean above) { 5729 mAbove = above; 5730 5731 if (above) { 5732 mPopupInlineErrorAboveBackgroundId = 5733 getResourceId(mPopupInlineErrorAboveBackgroundId, 5734 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5735 } else { 5736 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5737 com.android.internal.R.styleable.Theme_errorMessageBackground); 5738 } 5739 5740 mView.setBackgroundResource( 5741 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5742 } 5743 5744 private int getResourceId(int currentId, int index) { 5745 if (currentId == 0) { 5746 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5747 R.styleable.Theme); 5748 currentId = styledAttributes.getResourceId(index, 0); 5749 styledAttributes.recycle(); 5750 } 5751 return currentId; 5752 } 5753 5754 @Override 5755 public void update(int x, int y, int w, int h, boolean force) { 5756 super.update(x, y, w, h, force); 5757 5758 boolean above = isAboveAnchor(); 5759 if (above != mAbove) { 5760 fixDirection(above); 5761 } 5762 } 5763 } 5764 5765 static class InputContentType { 5766 int imeOptions = EditorInfo.IME_NULL; 5767 String privateImeOptions; 5768 CharSequence imeActionLabel; 5769 int imeActionId; 5770 Bundle extras; 5771 OnEditorActionListener onEditorActionListener; 5772 boolean enterDown; 5773 LocaleList imeHintLocales; 5774 } 5775 5776 static class InputMethodState { 5777 ExtractedTextRequest mExtractedTextRequest; 5778 final ExtractedText mExtractedText = new ExtractedText(); 5779 int mBatchEditNesting; 5780 boolean mCursorChanged; 5781 boolean mSelectionModeChanged; 5782 boolean mContentChanged; 5783 int mChangedStart, mChangedEnd, mChangedDelta; 5784 } 5785 5786 /** 5787 * @return True iff (start, end) is a valid range within the text. 5788 */ 5789 private static boolean isValidRange(CharSequence text, int start, int end) { 5790 return 0 <= start && start <= end && end <= text.length(); 5791 } 5792 5793 @VisibleForTesting 5794 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5795 return mSuggestionsPopupWindow; 5796 } 5797 5798 /** 5799 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5800 * text being typed (and hence always returns null from the filter() method). 5801 * 5802 * TODO: Make this span aware. 5803 */ 5804 public static class UndoInputFilter implements InputFilter { 5805 private final Editor mEditor; 5806 5807 // Whether the current filter pass is directly caused by an end-user text edit. 5808 private boolean mIsUserEdit; 5809 5810 // Whether the text field is handling an IME composition. Must be parceled in case the user 5811 // rotates the screen during composition. 5812 private boolean mHasComposition; 5813 5814 // Whether the user is expanding or shortening the text 5815 private boolean mExpanding; 5816 5817 // Whether the previous edit operation was in the current batch edit. 5818 private boolean mPreviousOperationWasInSameBatchEdit; 5819 5820 public UndoInputFilter(Editor editor) { 5821 mEditor = editor; 5822 } 5823 5824 public void saveInstanceState(Parcel parcel) { 5825 parcel.writeInt(mIsUserEdit ? 1 : 0); 5826 parcel.writeInt(mHasComposition ? 1 : 0); 5827 parcel.writeInt(mExpanding ? 1 : 0); 5828 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5829 } 5830 5831 public void restoreInstanceState(Parcel parcel) { 5832 mIsUserEdit = parcel.readInt() != 0; 5833 mHasComposition = parcel.readInt() != 0; 5834 mExpanding = parcel.readInt() != 0; 5835 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5836 } 5837 5838 /** 5839 * Signals that a user-triggered edit is starting. 5840 */ 5841 public void beginBatchEdit() { 5842 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5843 mIsUserEdit = true; 5844 } 5845 5846 public void endBatchEdit() { 5847 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5848 mIsUserEdit = false; 5849 mPreviousOperationWasInSameBatchEdit = false; 5850 } 5851 5852 @Override 5853 public CharSequence filter(CharSequence source, int start, int end, 5854 Spanned dest, int dstart, int dend) { 5855 if (DEBUG_UNDO) { 5856 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 5857 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5858 } 5859 5860 // Check to see if this edit should be tracked for undo. 5861 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5862 return null; 5863 } 5864 5865 final boolean hadComposition = mHasComposition; 5866 mHasComposition = isComposition(source); 5867 final boolean wasExpanding = mExpanding; 5868 boolean shouldCreateSeparateState = false; 5869 if ((end - start) != (dend - dstart)) { 5870 mExpanding = (end - start) > (dend - dstart); 5871 if (hadComposition && mExpanding != wasExpanding) { 5872 shouldCreateSeparateState = true; 5873 } 5874 } 5875 5876 // Handle edit. 5877 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 5878 return null; 5879 } 5880 5881 void freezeLastEdit() { 5882 mEditor.mUndoManager.beginUpdate("Edit text"); 5883 EditOperation lastEdit = getLastEdit(); 5884 if (lastEdit != null) { 5885 lastEdit.mFrozen = true; 5886 } 5887 mEditor.mUndoManager.endUpdate(); 5888 } 5889 5890 @Retention(RetentionPolicy.SOURCE) 5891 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 5892 private @interface MergeMode {} 5893 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 5894 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 5895 /** Use {@link EditOperation#mergeWith} to merge */ 5896 private static final int MERGE_EDIT_MODE_NORMAL = 2; 5897 5898 private void handleEdit(CharSequence source, int start, int end, 5899 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 5900 // An application may install a TextWatcher to provide additional modifications after 5901 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5902 // string). This results in multiple filter() calls for what the user considers to be 5903 // a single operation. Always undo the whole set of changes in one step. 5904 @MergeMode 5905 final int mergeMode; 5906 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 5907 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 5908 } else if (shouldCreateSeparateState) { 5909 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 5910 } else { 5911 mergeMode = MERGE_EDIT_MODE_NORMAL; 5912 } 5913 // Build a new operation with all the information from this edit. 5914 String newText = TextUtils.substring(source, start, end); 5915 String oldText = TextUtils.substring(dest, dstart, dend); 5916 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 5917 mHasComposition); 5918 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 5919 return; 5920 } 5921 recordEdit(edit, mergeMode); 5922 } 5923 5924 private EditOperation getLastEdit() { 5925 final UndoManager um = mEditor.mUndoManager; 5926 return um.getLastOperation( 5927 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5928 } 5929 /** 5930 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5931 * If forceMerge is true then the new edit is always merged. 5932 */ 5933 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 5934 // Fetch the last edit operation and attempt to merge in the new edit. 5935 final UndoManager um = mEditor.mUndoManager; 5936 um.beginUpdate("Edit text"); 5937 EditOperation lastEdit = getLastEdit(); 5938 if (lastEdit == null) { 5939 // Add this as the first edit. 5940 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5941 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5942 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 5943 // Forced merges take priority because they could be the result of a non-user-edit 5944 // change and this case should not create a new undo operation. 5945 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5946 lastEdit.forceMergeWith(edit); 5947 } else if (!mIsUserEdit) { 5948 // An application directly modified the Editable outside of a text edit. Treat this 5949 // as a new change and don't attempt to merge. 5950 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5951 um.commitState(mEditor.mUndoOwner); 5952 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5953 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 5954 // Merge succeeded, nothing else to do. 5955 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5956 } else { 5957 // Could not merge with the last edit, so commit the last edit and add this edit. 5958 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5959 um.commitState(mEditor.mUndoOwner); 5960 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5961 } 5962 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 5963 um.endUpdate(); 5964 } 5965 5966 private boolean canUndoEdit(CharSequence source, int start, int end, 5967 Spanned dest, int dstart, int dend) { 5968 if (!mEditor.mAllowUndo) { 5969 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5970 return false; 5971 } 5972 5973 if (mEditor.mUndoManager.isInUndo()) { 5974 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5975 return false; 5976 } 5977 5978 // Text filters run before input operations are applied. However, some input operations 5979 // are invalid and will throw exceptions when applied. This is common in tests. Don't 5980 // attempt to undo invalid operations. 5981 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 5982 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 5983 return false; 5984 } 5985 5986 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 5987 // on an input field. Skip no-op changes. 5988 if (start == end && dstart == dend) { 5989 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 5990 return false; 5991 } 5992 5993 return true; 5994 } 5995 5996 private static boolean isComposition(CharSequence source) { 5997 if (!(source instanceof Spannable)) { 5998 return false; 5999 } 6000 // This is a composition edit if the source has a non-zero-length composing span. 6001 Spannable text = (Spannable) source; 6002 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6003 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6004 return composeBegin < composeEnd; 6005 } 6006 6007 private boolean isInTextWatcher() { 6008 CharSequence text = mEditor.mTextView.getText(); 6009 return (text instanceof SpannableStringBuilder) 6010 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6011 } 6012 } 6013 6014 /** 6015 * An operation to undo a single "edit" to a text view. 6016 */ 6017 public static class EditOperation extends UndoOperation<Editor> { 6018 private static final int TYPE_INSERT = 0; 6019 private static final int TYPE_DELETE = 1; 6020 private static final int TYPE_REPLACE = 2; 6021 6022 private int mType; 6023 private String mOldText; 6024 private String mNewText; 6025 private int mStart; 6026 6027 private int mOldCursorPos; 6028 private int mNewCursorPos; 6029 private boolean mFrozen; 6030 private boolean mIsComposition; 6031 6032 /** 6033 * Constructs an edit operation from a text input operation on editor that replaces the 6034 * oldText starting at dstart with newText. 6035 */ 6036 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6037 boolean isComposition) { 6038 super(editor.mUndoOwner); 6039 mOldText = oldText; 6040 mNewText = newText; 6041 6042 // Determine the type of the edit. 6043 if (mNewText.length() > 0 && mOldText.length() == 0) { 6044 mType = TYPE_INSERT; 6045 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6046 mType = TYPE_DELETE; 6047 } else { 6048 mType = TYPE_REPLACE; 6049 } 6050 6051 mStart = dstart; 6052 // Store cursor data. 6053 mOldCursorPos = editor.mTextView.getSelectionStart(); 6054 mNewCursorPos = dstart + mNewText.length(); 6055 mIsComposition = isComposition; 6056 } 6057 6058 public EditOperation(Parcel src, ClassLoader loader) { 6059 super(src, loader); 6060 mType = src.readInt(); 6061 mOldText = src.readString(); 6062 mNewText = src.readString(); 6063 mStart = src.readInt(); 6064 mOldCursorPos = src.readInt(); 6065 mNewCursorPos = src.readInt(); 6066 mFrozen = src.readInt() == 1; 6067 mIsComposition = src.readInt() == 1; 6068 } 6069 6070 @Override 6071 public void writeToParcel(Parcel dest, int flags) { 6072 dest.writeInt(mType); 6073 dest.writeString(mOldText); 6074 dest.writeString(mNewText); 6075 dest.writeInt(mStart); 6076 dest.writeInt(mOldCursorPos); 6077 dest.writeInt(mNewCursorPos); 6078 dest.writeInt(mFrozen ? 1 : 0); 6079 dest.writeInt(mIsComposition ? 1 : 0); 6080 } 6081 6082 private int getNewTextEnd() { 6083 return mStart + mNewText.length(); 6084 } 6085 6086 private int getOldTextEnd() { 6087 return mStart + mOldText.length(); 6088 } 6089 6090 @Override 6091 public void commit() { 6092 } 6093 6094 @Override 6095 public void undo() { 6096 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6097 // Remove the new text and insert the old. 6098 Editor editor = getOwnerData(); 6099 Editable text = (Editable) editor.mTextView.getText(); 6100 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6101 } 6102 6103 @Override 6104 public void redo() { 6105 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6106 // Remove the old text and insert the new. 6107 Editor editor = getOwnerData(); 6108 Editable text = (Editable) editor.mTextView.getText(); 6109 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6110 } 6111 6112 /** 6113 * Attempts to merge this existing operation with a new edit. 6114 * @param edit The new edit operation. 6115 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6116 * object unchanged. 6117 */ 6118 private boolean mergeWith(EditOperation edit) { 6119 if (DEBUG_UNDO) { 6120 Log.d(TAG, "mergeWith old " + this); 6121 Log.d(TAG, "mergeWith new " + edit); 6122 } 6123 6124 if (mFrozen) { 6125 return false; 6126 } 6127 6128 switch (mType) { 6129 case TYPE_INSERT: 6130 return mergeInsertWith(edit); 6131 case TYPE_DELETE: 6132 return mergeDeleteWith(edit); 6133 case TYPE_REPLACE: 6134 return mergeReplaceWith(edit); 6135 default: 6136 return false; 6137 } 6138 } 6139 6140 private boolean mergeInsertWith(EditOperation edit) { 6141 if (edit.mType == TYPE_INSERT) { 6142 // Merge insertions that are contiguous even when it's frozen. 6143 if (getNewTextEnd() != edit.mStart) { 6144 return false; 6145 } 6146 mNewText += edit.mNewText; 6147 mNewCursorPos = edit.mNewCursorPos; 6148 mFrozen = edit.mFrozen; 6149 mIsComposition = edit.mIsComposition; 6150 return true; 6151 } 6152 if (mIsComposition && edit.mType == TYPE_REPLACE 6153 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6154 // Merge insertion with replace as they can be single insertion. 6155 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6156 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6157 mNewCursorPos = edit.mNewCursorPos; 6158 mIsComposition = edit.mIsComposition; 6159 return true; 6160 } 6161 return false; 6162 } 6163 6164 // TODO: Support forward delete. 6165 private boolean mergeDeleteWith(EditOperation edit) { 6166 // Only merge continuous deletes. 6167 if (edit.mType != TYPE_DELETE) { 6168 return false; 6169 } 6170 // Only merge deletions that are contiguous. 6171 if (mStart != edit.getOldTextEnd()) { 6172 return false; 6173 } 6174 mStart = edit.mStart; 6175 mOldText = edit.mOldText + mOldText; 6176 mNewCursorPos = edit.mNewCursorPos; 6177 mIsComposition = edit.mIsComposition; 6178 return true; 6179 } 6180 6181 private boolean mergeReplaceWith(EditOperation edit) { 6182 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6183 // Merge with adjacent insert. 6184 mNewText += edit.mNewText; 6185 mNewCursorPos = edit.mNewCursorPos; 6186 return true; 6187 } 6188 if (!mIsComposition) { 6189 return false; 6190 } 6191 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6192 && getNewTextEnd() >= edit.getOldTextEnd()) { 6193 // Merge with delete as they can be single operation. 6194 mNewText = mNewText.substring(0, edit.mStart - mStart) 6195 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6196 if (mNewText.isEmpty()) { 6197 mType = TYPE_DELETE; 6198 } 6199 mNewCursorPos = edit.mNewCursorPos; 6200 mIsComposition = edit.mIsComposition; 6201 return true; 6202 } 6203 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6204 && TextUtils.equals(mNewText, edit.mOldText)) { 6205 // Merge with the replace that replaces the same region. 6206 mNewText = edit.mNewText; 6207 mNewCursorPos = edit.mNewCursorPos; 6208 mIsComposition = edit.mIsComposition; 6209 return true; 6210 } 6211 return false; 6212 } 6213 6214 /** 6215 * Forcibly creates a single merged edit operation by simulating the entire text 6216 * contents being replaced. 6217 */ 6218 public void forceMergeWith(EditOperation edit) { 6219 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6220 if (mergeWith(edit)) { 6221 return; 6222 } 6223 Editor editor = getOwnerData(); 6224 6225 // Copy the text of the current field. 6226 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6227 // but would require two parallel implementations of modifyText() because Editable and 6228 // StringBuilder do not share an interface for replace/delete/insert. 6229 Editable editable = (Editable) editor.mTextView.getText(); 6230 Editable originalText = new SpannableStringBuilder(editable.toString()); 6231 6232 // Roll back the last operation. 6233 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6234 6235 // Clone the text again and apply the new operation. 6236 Editable finalText = new SpannableStringBuilder(editable.toString()); 6237 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6238 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6239 6240 // Convert this operation into a replace operation. 6241 mType = TYPE_REPLACE; 6242 mNewText = finalText.toString(); 6243 mOldText = originalText.toString(); 6244 mStart = 0; 6245 mNewCursorPos = edit.mNewCursorPos; 6246 mIsComposition = edit.mIsComposition; 6247 // mOldCursorPos is unchanged. 6248 } 6249 6250 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6251 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6252 // Apply the edit if it is still valid. 6253 if (isValidRange(text, deleteFrom, deleteTo) 6254 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6255 if (deleteFrom != deleteTo) { 6256 text.delete(deleteFrom, deleteTo); 6257 } 6258 if (newText.length() != 0) { 6259 text.insert(newTextInsertAt, newText); 6260 } 6261 } 6262 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6263 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6264 // TODO: Select all the text that was undone. 6265 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6266 Selection.setSelection(text, newCursorPos); 6267 } 6268 } 6269 6270 private String getTypeString() { 6271 switch (mType) { 6272 case TYPE_INSERT: 6273 return "insert"; 6274 case TYPE_DELETE: 6275 return "delete"; 6276 case TYPE_REPLACE: 6277 return "replace"; 6278 default: 6279 return ""; 6280 } 6281 } 6282 6283 @Override 6284 public String toString() { 6285 return "[mType=" + getTypeString() + ", " 6286 + "mOldText=" + mOldText + ", " 6287 + "mNewText=" + mNewText + ", " 6288 + "mStart=" + mStart + ", " 6289 + "mOldCursorPos=" + mOldCursorPos + ", " 6290 + "mNewCursorPos=" + mNewCursorPos + ", " 6291 + "mFrozen=" + mFrozen + ", " 6292 + "mIsComposition=" + mIsComposition + "]"; 6293 } 6294 6295 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6296 new Parcelable.ClassLoaderCreator<EditOperation>() { 6297 @Override 6298 public EditOperation createFromParcel(Parcel in) { 6299 return new EditOperation(in, null); 6300 } 6301 6302 @Override 6303 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6304 return new EditOperation(in, loader); 6305 } 6306 6307 @Override 6308 public EditOperation[] newArray(int size) { 6309 return new EditOperation[size]; 6310 } 6311 }; 6312 } 6313 6314 /** 6315 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6316 * These allow external applications to plug into currently selected text. 6317 */ 6318 static final class ProcessTextIntentActionsHandler { 6319 6320 private final Editor mEditor; 6321 private final TextView mTextView; 6322 private final Context mContext; 6323 private final PackageManager mPackageManager; 6324 private final String mPackageName; 6325 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6326 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6327 new SparseArray<>(); 6328 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6329 6330 private ProcessTextIntentActionsHandler(Editor editor) { 6331 mEditor = Preconditions.checkNotNull(editor); 6332 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6333 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6334 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6335 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6336 } 6337 6338 /** 6339 * Adds "PROCESS_TEXT" menu items to the specified menu. 6340 */ 6341 public void onInitializeMenu(Menu menu) { 6342 int i = 0; 6343 loadSupportedActivities(); 6344 for (ResolveInfo resolveInfo : mSupportedActivities) { 6345 menu.add(Menu.NONE, Menu.NONE, 6346 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6347 getLabel(resolveInfo)) 6348 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6349 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6350 } 6351 } 6352 6353 /** 6354 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6355 * menu item. 6356 * 6357 * @return True if the action was performed, false otherwise. 6358 */ 6359 public boolean performMenuItemAction(MenuItem item) { 6360 return fireIntent(item.getIntent()); 6361 } 6362 6363 /** 6364 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6365 */ 6366 public void initializeAccessibilityActions() { 6367 mAccessibilityIntents.clear(); 6368 mAccessibilityActions.clear(); 6369 int i = 0; 6370 loadSupportedActivities(); 6371 for (ResolveInfo resolveInfo : mSupportedActivities) { 6372 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6373 mAccessibilityActions.put( 6374 actionId, 6375 new AccessibilityNodeInfo.AccessibilityAction( 6376 actionId, getLabel(resolveInfo))); 6377 mAccessibilityIntents.put( 6378 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6379 } 6380 } 6381 6382 /** 6383 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6384 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6385 * latest accessibility actions available for this call. 6386 */ 6387 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6388 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6389 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6390 } 6391 } 6392 6393 /** 6394 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6395 * accessibility action id. 6396 * 6397 * @return True if the action was performed, false otherwise. 6398 */ 6399 public boolean performAccessibilityAction(int actionId) { 6400 return fireIntent(mAccessibilityIntents.get(actionId)); 6401 } 6402 6403 private boolean fireIntent(Intent intent) { 6404 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6405 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 6406 mEditor.mPreserveSelection = true; 6407 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6408 return true; 6409 } 6410 return false; 6411 } 6412 6413 private void loadSupportedActivities() { 6414 mSupportedActivities.clear(); 6415 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6416 List<ResolveInfo> unfiltered = 6417 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6418 for (ResolveInfo info : unfiltered) { 6419 if (isSupportedActivity(info)) { 6420 mSupportedActivities.add(info); 6421 } 6422 } 6423 } 6424 6425 private boolean isSupportedActivity(ResolveInfo info) { 6426 return mPackageName.equals(info.activityInfo.packageName) 6427 || info.activityInfo.exported 6428 && (info.activityInfo.permission == null 6429 || mContext.checkSelfPermission(info.activityInfo.permission) 6430 == PackageManager.PERMISSION_GRANTED); 6431 } 6432 6433 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6434 return createProcessTextIntent() 6435 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6436 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6437 } 6438 6439 private Intent createProcessTextIntent() { 6440 return new Intent() 6441 .setAction(Intent.ACTION_PROCESS_TEXT) 6442 .setType("text/plain"); 6443 } 6444 6445 private CharSequence getLabel(ResolveInfo resolveInfo) { 6446 return resolveInfo.loadLabel(mPackageManager); 6447 } 6448 } 6449} 6450