Editor.java revision 0fd28c9f024e780fe8d63e8090286c6eae070b8b
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.Parcel; 46import android.os.Parcelable; 47import android.os.ParcelableParcel; 48import android.os.SystemClock; 49import android.provider.Settings; 50import android.text.DynamicLayout; 51import android.text.Editable; 52import android.text.InputFilter; 53import android.text.InputType; 54import android.text.Layout; 55import android.text.ParcelableSpan; 56import android.text.Selection; 57import android.text.SpanWatcher; 58import android.text.Spannable; 59import android.text.SpannableStringBuilder; 60import android.text.Spanned; 61import android.text.StaticLayout; 62import android.text.TextUtils; 63import android.text.method.KeyListener; 64import android.text.method.MetaKeyKeyListener; 65import android.text.method.MovementMethod; 66import android.text.method.WordIterator; 67import android.text.style.EasyEditSpan; 68import android.text.style.SuggestionRangeSpan; 69import android.text.style.SuggestionSpan; 70import android.text.style.TextAppearanceSpan; 71import android.text.style.URLSpan; 72import android.util.DisplayMetrics; 73import android.util.LocaleList; 74import android.util.Log; 75import android.util.SparseArray; 76import android.view.ActionMode; 77import android.view.ActionMode.Callback; 78import android.view.ContextMenu; 79import android.view.DisplayListCanvas; 80import android.view.DragEvent; 81import android.view.DropPermissions; 82import android.view.Gravity; 83import android.view.InputDevice; 84import android.view.LayoutInflater; 85import android.view.Menu; 86import android.view.MenuItem; 87import android.view.MotionEvent; 88import android.view.RenderNode; 89import android.view.SubMenu; 90import android.view.View; 91import android.view.View.DragShadowBuilder; 92import android.view.View.OnClickListener; 93import android.view.ViewConfiguration; 94import android.view.ViewGroup; 95import android.view.ViewGroup.LayoutParams; 96import android.view.ViewParent; 97import android.view.ViewTreeObserver; 98import android.view.WindowManager; 99import android.view.accessibility.AccessibilityNodeInfo; 100import android.view.inputmethod.CorrectionInfo; 101import android.view.inputmethod.CursorAnchorInfo; 102import android.view.inputmethod.EditorInfo; 103import android.view.inputmethod.ExtractedText; 104import android.view.inputmethod.ExtractedTextRequest; 105import android.view.inputmethod.InputConnection; 106import android.view.inputmethod.InputMethodManager; 107import android.widget.AdapterView.OnItemClickListener; 108import android.widget.TextView.Drawables; 109import android.widget.TextView.OnEditorActionListener; 110 111import com.android.internal.annotations.VisibleForTesting; 112import com.android.internal.util.ArrayUtils; 113import com.android.internal.util.GrowingArrayUtils; 114import com.android.internal.util.Preconditions; 115import com.android.internal.widget.EditableInputConnection; 116 117import java.lang.annotation.Retention; 118import java.lang.annotation.RetentionPolicy; 119import java.text.BreakIterator; 120import java.util.Arrays; 121import java.util.Comparator; 122import java.util.HashMap; 123import java.util.List; 124 125 126/** 127 * Helper class used by TextView to handle editable text views. 128 * 129 * @hide 130 */ 131public class Editor { 132 private static final String TAG = "Editor"; 133 private static final boolean DEBUG_UNDO = false; 134 135 static final int BLINK = 500; 136 private static final float[] TEMP_POSITION = new float[2]; 137 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 138 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 139 private static final int UNSET_X_VALUE = -1; 140 private static final int UNSET_LINE = -1; 141 // Tag used when the Editor maintains its own separate UndoManager. 142 private static final String UNDO_OWNER_TAG = "Editor"; 143 144 // Ordering constants used to place the Action Mode or context menu items in their menu. 145 private static final int MENU_ITEM_ORDER_UNDO = 1; 146 private static final int MENU_ITEM_ORDER_REDO = 2; 147 private static final int MENU_ITEM_ORDER_CUT = 3; 148 private static final int MENU_ITEM_ORDER_COPY = 4; 149 private static final int MENU_ITEM_ORDER_PASTE = 5; 150 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 6; 151 private static final int MENU_ITEM_ORDER_SHARE = 7; 152 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 153 private static final int MENU_ITEM_ORDER_REPLACE = 9; 154 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 10; 155 156 // Each Editor manages its own undo stack. 157 private final UndoManager mUndoManager = new UndoManager(); 158 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 159 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 160 boolean mAllowUndo = true; 161 162 // Cursor Controllers. 163 InsertionPointCursorController mInsertionPointCursorController; 164 SelectionModifierCursorController mSelectionModifierCursorController; 165 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 166 ActionMode mTextActionMode; 167 boolean mInsertionControllerEnabled; 168 boolean mSelectionControllerEnabled; 169 170 // Used to highlight a word when it is corrected by the IME 171 CorrectionHighlighter mCorrectionHighlighter; 172 173 InputContentType mInputContentType; 174 InputMethodState mInputMethodState; 175 176 private static class TextRenderNode { 177 RenderNode renderNode; 178 boolean isDirty; 179 public TextRenderNode(String name) { 180 isDirty = true; 181 renderNode = RenderNode.create(name, null); 182 } 183 boolean needsRecord() { return isDirty || !renderNode.isValid(); } 184 } 185 TextRenderNode[] mTextRenderNodes; 186 187 boolean mFrozenWithFocus; 188 boolean mSelectionMoved; 189 boolean mTouchFocusSelected; 190 191 KeyListener mKeyListener; 192 int mInputType = EditorInfo.TYPE_NULL; 193 194 boolean mDiscardNextActionUp; 195 boolean mIgnoreActionUpEvent; 196 private boolean mIgnoreNextMouseActionUpOrDown; 197 198 long mShowCursor; 199 Blink mBlink; 200 201 boolean mCursorVisible = true; 202 boolean mSelectAllOnFocus; 203 boolean mTextIsSelectable; 204 205 CharSequence mError; 206 boolean mErrorWasChanged; 207 ErrorPopup mErrorPopup; 208 209 /** 210 * This flag is set if the TextView tries to display an error before it 211 * is attached to the window (so its position is still unknown). 212 * It causes the error to be shown later, when onAttachedToWindow() 213 * is called. 214 */ 215 boolean mShowErrorAfterAttach; 216 217 boolean mInBatchEditControllers; 218 boolean mShowSoftInputOnFocus = true; 219 private boolean mPreserveSelection; 220 private boolean mRestartActionModeOnNextRefresh; 221 boolean mTemporaryDetach; 222 223 boolean mIsBeingLongClicked; 224 225 SuggestionsPopupWindow mSuggestionsPopupWindow; 226 SuggestionRangeSpan mSuggestionRangeSpan; 227 Runnable mShowSuggestionRunnable; 228 229 final Drawable[] mCursorDrawable = new Drawable[2]; 230 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 231 232 private Drawable mSelectHandleLeft; 233 private Drawable mSelectHandleRight; 234 private Drawable mSelectHandleCenter; 235 236 // Global listener that detects changes in the global position of the TextView 237 private PositionListener mPositionListener; 238 239 float mLastDownPositionX, mLastDownPositionY; 240 private float mContextMenuAnchorX, mContextMenuAnchorY; 241 Callback mCustomSelectionActionModeCallback; 242 Callback mCustomInsertionActionModeCallback; 243 244 // Set when this TextView gained focus with some text selected. Will start selection mode. 245 boolean mCreatedWithASelection; 246 247 // Indicates the current tap state (first tap, double tap, or triple click). 248 private int mTapState = TAP_STATE_INITIAL; 249 private long mLastTouchUpTime = 0; 250 private static final int TAP_STATE_INITIAL = 0; 251 private static final int TAP_STATE_FIRST_TAP = 1; 252 private static final int TAP_STATE_DOUBLE_TAP = 2; 253 // Only for mouse input. 254 private static final int TAP_STATE_TRIPLE_CLICK = 3; 255 256 // The button state as of the last time #onTouchEvent is called. 257 private int mLastButtonState; 258 259 private Runnable mInsertionActionModeRunnable; 260 261 // The span controller helps monitoring the changes to which the Editor needs to react: 262 // - EasyEditSpans, for which we have some UI to display on attach and on hide 263 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 264 private SpanController mSpanController; 265 266 WordIterator mWordIterator; 267 SpellChecker mSpellChecker; 268 269 // This word iterator is set with text and used to determine word boundaries 270 // when a user is selecting text. 271 private WordIterator mWordIteratorWithText; 272 // Indicate that the text in the word iterator needs to be updated. 273 private boolean mUpdateWordIteratorText; 274 275 private Rect mTempRect; 276 277 private TextView mTextView; 278 279 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 280 281 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 282 283 private final Runnable mShowFloatingToolbar = new Runnable() { 284 @Override 285 public void run() { 286 if (mTextActionMode != null) { 287 mTextActionMode.hide(0); // hide off. 288 } 289 } 290 }; 291 292 boolean mIsInsertionActionModeStartPending = false; 293 294 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 295 296 Editor(TextView textView) { 297 mTextView = textView; 298 // Synchronize the filter list, which places the undo input filter at the end. 299 mTextView.setFilters(mTextView.getFilters()); 300 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 301 } 302 303 ParcelableParcel saveInstanceState() { 304 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 305 Parcel parcel = state.getParcel(); 306 mUndoManager.saveInstanceState(parcel); 307 mUndoInputFilter.saveInstanceState(parcel); 308 return state; 309 } 310 311 void restoreInstanceState(ParcelableParcel state) { 312 Parcel parcel = state.getParcel(); 313 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 314 mUndoInputFilter.restoreInstanceState(parcel); 315 // Re-associate this object as the owner of undo state. 316 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 317 } 318 319 /** 320 * Forgets all undo and redo operations for this Editor. 321 */ 322 void forgetUndoRedo() { 323 UndoOwner[] owners = { mUndoOwner }; 324 mUndoManager.forgetUndos(owners, -1 /* all */); 325 mUndoManager.forgetRedos(owners, -1 /* all */); 326 } 327 328 boolean canUndo() { 329 UndoOwner[] owners = { mUndoOwner }; 330 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 331 } 332 333 boolean canRedo() { 334 UndoOwner[] owners = { mUndoOwner }; 335 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 336 } 337 338 void undo() { 339 if (!mAllowUndo) { 340 return; 341 } 342 UndoOwner[] owners = { mUndoOwner }; 343 mUndoManager.undo(owners, 1); // Undo 1 action. 344 } 345 346 void redo() { 347 if (!mAllowUndo) { 348 return; 349 } 350 UndoOwner[] owners = { mUndoOwner }; 351 mUndoManager.redo(owners, 1); // Redo 1 action. 352 } 353 354 void replace() { 355 if (mSuggestionsPopupWindow == null) { 356 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 357 } 358 hideCursorAndSpanControllers(); 359 mSuggestionsPopupWindow.show(); 360 361 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 362 Selection.setSelection((Spannable) mTextView.getText(), middle); 363 } 364 365 void onAttachedToWindow() { 366 if (mShowErrorAfterAttach) { 367 showError(); 368 mShowErrorAfterAttach = false; 369 } 370 mTemporaryDetach = false; 371 372 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 373 // No need to create the controller. 374 // The get method will add the listener on controller creation. 375 if (mInsertionPointCursorController != null) { 376 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 377 } 378 if (mSelectionModifierCursorController != null) { 379 mSelectionModifierCursorController.resetTouchOffsets(); 380 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 381 } 382 updateSpellCheckSpans(0, mTextView.getText().length(), 383 true /* create the spell checker if needed */); 384 385 if (mTextView.hasSelection()) { 386 refreshTextActionMode(); 387 } 388 389 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 390 resumeBlink(); 391 } 392 393 void onDetachedFromWindow() { 394 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 395 396 if (mError != null) { 397 hideError(); 398 } 399 400 suspendBlink(); 401 402 if (mInsertionPointCursorController != null) { 403 mInsertionPointCursorController.onDetached(); 404 } 405 406 if (mSelectionModifierCursorController != null) { 407 mSelectionModifierCursorController.onDetached(); 408 } 409 410 if (mShowSuggestionRunnable != null) { 411 mTextView.removeCallbacks(mShowSuggestionRunnable); 412 } 413 414 // Cancel the single tap delayed runnable. 415 if (mInsertionActionModeRunnable != null) { 416 mTextView.removeCallbacks(mInsertionActionModeRunnable); 417 } 418 419 mTextView.removeCallbacks(mShowFloatingToolbar); 420 421 discardTextDisplayLists(); 422 423 if (mSpellChecker != null) { 424 mSpellChecker.closeSession(); 425 // Forces the creation of a new SpellChecker next time this window is created. 426 // Will handle the cases where the settings has been changed in the meantime. 427 mSpellChecker = null; 428 } 429 430 hideCursorAndSpanControllers(); 431 stopTextActionModeWithPreservingSelection(); 432 mTemporaryDetach = false; 433 } 434 435 private void discardTextDisplayLists() { 436 if (mTextRenderNodes != null) { 437 for (int i = 0; i < mTextRenderNodes.length; i++) { 438 RenderNode displayList = mTextRenderNodes[i] != null 439 ? mTextRenderNodes[i].renderNode : null; 440 if (displayList != null && displayList.isValid()) { 441 displayList.discardDisplayList(); 442 } 443 } 444 } 445 } 446 447 private void showError() { 448 if (mTextView.getWindowToken() == null) { 449 mShowErrorAfterAttach = true; 450 return; 451 } 452 453 if (mErrorPopup == null) { 454 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 455 final TextView err = (TextView) inflater.inflate( 456 com.android.internal.R.layout.textview_hint, null); 457 458 final float scale = mTextView.getResources().getDisplayMetrics().density; 459 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 460 mErrorPopup.setFocusable(false); 461 // The user is entering text, so the input method is needed. We 462 // don't want the popup to be displayed on top of it. 463 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 464 } 465 466 TextView tv = (TextView) mErrorPopup.getContentView(); 467 chooseSize(mErrorPopup, mError, tv); 468 tv.setText(mError); 469 470 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 471 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 472 } 473 474 public void setError(CharSequence error, Drawable icon) { 475 mError = TextUtils.stringOrSpannedString(error); 476 mErrorWasChanged = true; 477 478 if (mError == null) { 479 setErrorIcon(null); 480 if (mErrorPopup != null) { 481 if (mErrorPopup.isShowing()) { 482 mErrorPopup.dismiss(); 483 } 484 485 mErrorPopup = null; 486 } 487 mShowErrorAfterAttach = false; 488 } else { 489 setErrorIcon(icon); 490 if (mTextView.isFocused()) { 491 showError(); 492 } 493 } 494 } 495 496 private void setErrorIcon(Drawable icon) { 497 Drawables dr = mTextView.mDrawables; 498 if (dr == null) { 499 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 500 } 501 dr.setErrorDrawable(icon, mTextView); 502 503 mTextView.resetResolvedDrawables(); 504 mTextView.invalidate(); 505 mTextView.requestLayout(); 506 } 507 508 private void hideError() { 509 if (mErrorPopup != null) { 510 if (mErrorPopup.isShowing()) { 511 mErrorPopup.dismiss(); 512 } 513 } 514 515 mShowErrorAfterAttach = false; 516 } 517 518 /** 519 * Returns the X offset to make the pointy top of the error point 520 * at the middle of the error icon. 521 */ 522 private int getErrorX() { 523 /* 524 * The "25" is the distance between the point and the right edge 525 * of the background 526 */ 527 final float scale = mTextView.getResources().getDisplayMetrics().density; 528 529 final Drawables dr = mTextView.mDrawables; 530 531 final int layoutDirection = mTextView.getLayoutDirection(); 532 int errorX; 533 int offset; 534 switch (layoutDirection) { 535 default: 536 case View.LAYOUT_DIRECTION_LTR: 537 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 538 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 539 mTextView.getPaddingRight() + offset; 540 break; 541 case View.LAYOUT_DIRECTION_RTL: 542 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 543 errorX = mTextView.getPaddingLeft() + offset; 544 break; 545 } 546 return errorX; 547 } 548 549 /** 550 * Returns the Y offset to make the pointy top of the error point 551 * at the bottom of the error icon. 552 */ 553 private int getErrorY() { 554 /* 555 * Compound, not extended, because the icon is not clipped 556 * if the text height is smaller. 557 */ 558 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 559 int vspace = mTextView.getBottom() - mTextView.getTop() - 560 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 561 562 final Drawables dr = mTextView.mDrawables; 563 564 final int layoutDirection = mTextView.getLayoutDirection(); 565 int height; 566 switch (layoutDirection) { 567 default: 568 case View.LAYOUT_DIRECTION_LTR: 569 height = (dr != null ? dr.mDrawableHeightRight : 0); 570 break; 571 case View.LAYOUT_DIRECTION_RTL: 572 height = (dr != null ? dr.mDrawableHeightLeft : 0); 573 break; 574 } 575 576 int icontop = compoundPaddingTop + (vspace - height) / 2; 577 578 /* 579 * The "2" is the distance between the point and the top edge 580 * of the background. 581 */ 582 final float scale = mTextView.getResources().getDisplayMetrics().density; 583 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 584 } 585 586 void createInputContentTypeIfNeeded() { 587 if (mInputContentType == null) { 588 mInputContentType = new InputContentType(); 589 } 590 } 591 592 void createInputMethodStateIfNeeded() { 593 if (mInputMethodState == null) { 594 mInputMethodState = new InputMethodState(); 595 } 596 } 597 598 boolean isCursorVisible() { 599 // The default value is true, even when there is no associated Editor 600 return mCursorVisible && mTextView.isTextEditable(); 601 } 602 603 void prepareCursorControllers() { 604 boolean windowSupportsHandles = false; 605 606 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 607 if (params instanceof WindowManager.LayoutParams) { 608 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 609 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 610 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 611 } 612 613 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 614 mInsertionControllerEnabled = enabled && isCursorVisible(); 615 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 616 617 if (!mInsertionControllerEnabled) { 618 hideInsertionPointCursorController(); 619 if (mInsertionPointCursorController != null) { 620 mInsertionPointCursorController.onDetached(); 621 mInsertionPointCursorController = null; 622 } 623 } 624 625 if (!mSelectionControllerEnabled) { 626 stopTextActionMode(); 627 if (mSelectionModifierCursorController != null) { 628 mSelectionModifierCursorController.onDetached(); 629 mSelectionModifierCursorController = null; 630 } 631 } 632 } 633 634 void hideInsertionPointCursorController() { 635 if (mInsertionPointCursorController != null) { 636 mInsertionPointCursorController.hide(); 637 } 638 } 639 640 /** 641 * Hides the insertion and span controllers. 642 */ 643 void hideCursorAndSpanControllers() { 644 hideCursorControllers(); 645 hideSpanControllers(); 646 } 647 648 private void hideSpanControllers() { 649 if (mSpanController != null) { 650 mSpanController.hide(); 651 } 652 } 653 654 private void hideCursorControllers() { 655 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 656 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 657 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 658 // to distinguish one from the other. 659 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) || 660 !mSuggestionsPopupWindow.isShowingUp())) { 661 // Should be done before hide insertion point controller since it triggers a show of it 662 mSuggestionsPopupWindow.hide(); 663 } 664 hideInsertionPointCursorController(); 665 } 666 667 /** 668 * Create new SpellCheckSpans on the modified region. 669 */ 670 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 671 // Remove spans whose adjacent characters are text not punctuation 672 mTextView.removeAdjacentSuggestionSpans(start); 673 mTextView.removeAdjacentSuggestionSpans(end); 674 675 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 676 !(mTextView.isInExtractedMode())) { 677 if (mSpellChecker == null && createSpellChecker) { 678 mSpellChecker = new SpellChecker(mTextView); 679 } 680 if (mSpellChecker != null) { 681 mSpellChecker.spellCheck(start, end); 682 } 683 } 684 } 685 686 void onScreenStateChanged(int screenState) { 687 switch (screenState) { 688 case View.SCREEN_STATE_ON: 689 resumeBlink(); 690 break; 691 case View.SCREEN_STATE_OFF: 692 suspendBlink(); 693 break; 694 } 695 } 696 697 private void suspendBlink() { 698 if (mBlink != null) { 699 mBlink.cancel(); 700 } 701 } 702 703 private void resumeBlink() { 704 if (mBlink != null) { 705 mBlink.uncancel(); 706 makeBlink(); 707 } 708 } 709 710 void adjustInputType(boolean password, boolean passwordInputType, 711 boolean webPasswordInputType, boolean numberPasswordInputType) { 712 // mInputType has been set from inputType, possibly modified by mInputMethod. 713 // Specialize mInputType to [web]password if we have a text class and the original input 714 // type was a password. 715 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 716 if (password || passwordInputType) { 717 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 718 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 719 } 720 if (webPasswordInputType) { 721 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 722 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 723 } 724 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 725 if (numberPasswordInputType) { 726 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 727 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 728 } 729 } 730 } 731 732 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 733 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 734 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 735 736 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 737 com.android.internal.R.dimen.textview_error_popup_default_width); 738 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 739 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 740 float max = 0; 741 for (int i = 0; i < l.getLineCount(); i++) { 742 max = Math.max(max, l.getLineWidth(i)); 743 } 744 745 /* 746 * Now set the popup size to be big enough for the text plus the border capped 747 * to DEFAULT_MAX_POPUP_WIDTH 748 */ 749 pop.setWidth(wid + (int) Math.ceil(max)); 750 pop.setHeight(ht + l.getHeight()); 751 } 752 753 void setFrame() { 754 if (mErrorPopup != null) { 755 TextView tv = (TextView) mErrorPopup.getContentView(); 756 chooseSize(mErrorPopup, mError, tv); 757 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 758 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 759 } 760 } 761 762 private int getWordStart(int offset) { 763 // FIXME - For this and similar methods we're not doing anything to check if there's 764 // a LocaleSpan in the text, this may be something we should try handling or checking for. 765 int retOffset = getWordIteratorWithText().prevBoundary(offset); 766 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 767 // On punctuation boundary or within group of punctuation, find punctuation start. 768 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 769 } else { 770 // Not on a punctuation boundary, find the word start. 771 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 772 } 773 if (retOffset == BreakIterator.DONE) { 774 return offset; 775 } 776 return retOffset; 777 } 778 779 private int getWordEnd(int offset) { 780 int retOffset = getWordIteratorWithText().nextBoundary(offset); 781 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 782 // On punctuation boundary or within group of punctuation, find punctuation end. 783 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 784 } else { 785 // Not on a punctuation boundary, find the word end. 786 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 787 } 788 if (retOffset == BreakIterator.DONE) { 789 return offset; 790 } 791 return retOffset; 792 } 793 794 private boolean needsToSelectAllToSelectWordOrParagraph() { 795 if (mTextView.hasPasswordTransformationMethod()) { 796 // Always select all on a password field. 797 // Cut/copy menu entries are not available for passwords, but being able to select all 798 // is however useful to delete or paste to replace the entire content. 799 return true; 800 } 801 802 int inputType = mTextView.getInputType(); 803 int klass = inputType & InputType.TYPE_MASK_CLASS; 804 int variation = inputType & InputType.TYPE_MASK_VARIATION; 805 806 // Specific text field types: select the entire text for these 807 if (klass == InputType.TYPE_CLASS_NUMBER || 808 klass == InputType.TYPE_CLASS_PHONE || 809 klass == InputType.TYPE_CLASS_DATETIME || 810 variation == InputType.TYPE_TEXT_VARIATION_URI || 811 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 812 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 813 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 814 return true; 815 } 816 return false; 817 } 818 819 /** 820 * Adjusts selection to the word under last touch offset. Return true if the operation was 821 * successfully performed. 822 */ 823 private boolean selectCurrentWord() { 824 if (!mTextView.canSelectText()) { 825 return false; 826 } 827 828 if (needsToSelectAllToSelectWordOrParagraph()) { 829 return mTextView.selectAllText(); 830 } 831 832 long lastTouchOffsets = getLastTouchOffsets(); 833 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 834 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 835 836 // Safety check in case standard touch event handling has been bypassed 837 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 838 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 839 840 int selectionStart, selectionEnd; 841 842 // If a URLSpan (web address, email, phone...) is found at that position, select it. 843 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 844 getSpans(minOffset, maxOffset, URLSpan.class); 845 if (urlSpans.length >= 1) { 846 URLSpan urlSpan = urlSpans[0]; 847 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 848 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 849 } else { 850 // FIXME - We should check if there's a LocaleSpan in the text, this may be 851 // something we should try handling or checking for. 852 final WordIterator wordIterator = getWordIterator(); 853 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 854 855 selectionStart = wordIterator.getBeginning(minOffset); 856 selectionEnd = wordIterator.getEnd(maxOffset); 857 858 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 859 selectionStart == selectionEnd) { 860 // Possible when the word iterator does not properly handle the text's language 861 long range = getCharClusterRange(minOffset); 862 selectionStart = TextUtils.unpackRangeStartFromLong(range); 863 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 864 } 865 } 866 867 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 868 return selectionEnd > selectionStart; 869 } 870 871 /** 872 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 873 * successfully performed. 874 */ 875 private boolean selectCurrentParagraph() { 876 if (!mTextView.canSelectText()) { 877 return false; 878 } 879 880 if (needsToSelectAllToSelectWordOrParagraph()) { 881 return mTextView.selectAllText(); 882 } 883 884 long lastTouchOffsets = getLastTouchOffsets(); 885 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 886 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 887 888 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 889 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 890 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 891 if (start < end) { 892 Selection.setSelection((Spannable) mTextView.getText(), start, end); 893 return true; 894 } 895 return false; 896 } 897 898 /** 899 * Get the minimum range of paragraphs that contains startOffset and endOffset. 900 */ 901 private long getParagraphsRange(int startOffset, int endOffset) { 902 final Layout layout = mTextView.getLayout(); 903 if (layout == null) { 904 return TextUtils.packRangeInLong(-1, -1); 905 } 906 final CharSequence text = mTextView.getText(); 907 int minLine = layout.getLineForOffset(startOffset); 908 // Search paragraph start. 909 while (minLine > 0) { 910 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 911 if (text.charAt(prevLineEndOffset - 1) == '\n') { 912 break; 913 } 914 minLine--; 915 } 916 int maxLine = layout.getLineForOffset(endOffset); 917 // Search paragraph end. 918 while (maxLine < layout.getLineCount() - 1) { 919 final int lineEndOffset = layout.getLineEnd(maxLine); 920 if (text.charAt(lineEndOffset - 1) == '\n') { 921 break; 922 } 923 maxLine++; 924 } 925 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 926 } 927 928 void onLocaleChanged() { 929 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 930 // proper new locale 931 mWordIterator = null; 932 mWordIteratorWithText = null; 933 } 934 935 /** 936 * @hide 937 */ 938 public WordIterator getWordIterator() { 939 if (mWordIterator == null) { 940 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 941 } 942 return mWordIterator; 943 } 944 945 private WordIterator getWordIteratorWithText() { 946 if (mWordIteratorWithText == null) { 947 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 948 mUpdateWordIteratorText = true; 949 } 950 if (mUpdateWordIteratorText) { 951 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 952 // to the user's selection is needed. A possible solution would be to 953 // copy some number N of characters near the selection and then when the 954 // user approaches N then we'd do another copy of the next N characters. 955 CharSequence text = mTextView.getText(); 956 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 957 mUpdateWordIteratorText = false; 958 } 959 return mWordIteratorWithText; 960 } 961 962 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 963 final Layout layout = mTextView.getLayout(); 964 if (layout == null) return offset; 965 return findAfterGivenOffset == layout.isRtlCharAt(offset) ? 966 layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 967 } 968 969 private long getCharClusterRange(int offset) { 970 final int textLength = mTextView.getText().length(); 971 if (offset < textLength) { 972 final int clusterEndOffset = getNextCursorOffset(offset, true); 973 return TextUtils.packRangeInLong( 974 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 975 } 976 if (offset - 1 >= 0) { 977 final int clusterStartOffset = getNextCursorOffset(offset, false); 978 return TextUtils.packRangeInLong(clusterStartOffset, 979 getNextCursorOffset(clusterStartOffset, true)); 980 } 981 return TextUtils.packRangeInLong(offset, offset); 982 } 983 984 private boolean touchPositionIsInSelection() { 985 int selectionStart = mTextView.getSelectionStart(); 986 int selectionEnd = mTextView.getSelectionEnd(); 987 988 if (selectionStart == selectionEnd) { 989 return false; 990 } 991 992 if (selectionStart > selectionEnd) { 993 int tmp = selectionStart; 994 selectionStart = selectionEnd; 995 selectionEnd = tmp; 996 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 997 } 998 999 SelectionModifierCursorController selectionController = getSelectionController(); 1000 int minOffset = selectionController.getMinTouchOffset(); 1001 int maxOffset = selectionController.getMaxTouchOffset(); 1002 1003 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1004 } 1005 1006 private PositionListener getPositionListener() { 1007 if (mPositionListener == null) { 1008 mPositionListener = new PositionListener(); 1009 } 1010 return mPositionListener; 1011 } 1012 1013 private interface TextViewPositionListener { 1014 public void updatePosition(int parentPositionX, int parentPositionY, 1015 boolean parentPositionChanged, boolean parentScrolled); 1016 } 1017 1018 private boolean isPositionVisible(final float positionX, final float positionY) { 1019 synchronized (TEMP_POSITION) { 1020 final float[] position = TEMP_POSITION; 1021 position[0] = positionX; 1022 position[1] = positionY; 1023 View view = mTextView; 1024 1025 while (view != null) { 1026 if (view != mTextView) { 1027 // Local scroll is already taken into account in positionX/Y 1028 position[0] -= view.getScrollX(); 1029 position[1] -= view.getScrollY(); 1030 } 1031 1032 if (position[0] < 0 || position[1] < 0 || 1033 position[0] > view.getWidth() || position[1] > view.getHeight()) { 1034 return false; 1035 } 1036 1037 if (!view.getMatrix().isIdentity()) { 1038 view.getMatrix().mapPoints(position); 1039 } 1040 1041 position[0] += view.getLeft(); 1042 position[1] += view.getTop(); 1043 1044 final ViewParent parent = view.getParent(); 1045 if (parent instanceof View) { 1046 view = (View) parent; 1047 } else { 1048 // We've reached the ViewRoot, stop iterating 1049 view = null; 1050 } 1051 } 1052 } 1053 1054 // We've been able to walk up the view hierarchy and the position was never clipped 1055 return true; 1056 } 1057 1058 private boolean isOffsetVisible(int offset) { 1059 Layout layout = mTextView.getLayout(); 1060 if (layout == null) return false; 1061 1062 final int line = layout.getLineForOffset(offset); 1063 final int lineBottom = layout.getLineBottom(line); 1064 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1065 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1066 lineBottom + mTextView.viewportToContentVerticalOffset()); 1067 } 1068 1069 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1070 * in the view. Returns false when the position is in the empty space of left/right of text. 1071 */ 1072 private boolean isPositionOnText(float x, float y) { 1073 Layout layout = mTextView.getLayout(); 1074 if (layout == null) return false; 1075 1076 final int line = mTextView.getLineAtCoordinate(y); 1077 x = mTextView.convertToLocalHorizontalCoordinate(x); 1078 1079 if (x < layout.getLineLeft(line)) return false; 1080 if (x > layout.getLineRight(line)) return false; 1081 return true; 1082 } 1083 1084 private void startDragAndDrop() { 1085 // TODO: Fix drag and drop in full screen extracted mode. 1086 if (mTextView.isInExtractedMode()) { 1087 return; 1088 } 1089 final int start = mTextView.getSelectionStart(); 1090 final int end = mTextView.getSelectionEnd(); 1091 CharSequence selectedText = mTextView.getTransformedText(start, end); 1092 ClipData data = ClipData.newPlainText(null, selectedText); 1093 DragLocalState localState = new DragLocalState(mTextView, start, end); 1094 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1095 View.DRAG_FLAG_GLOBAL); 1096 stopTextActionMode(); 1097 if (hasSelectionController()) { 1098 getSelectionController().resetTouchOffsets(); 1099 } 1100 } 1101 1102 public boolean performLongClick(boolean handled) { 1103 // Long press in empty space moves cursor and starts the insertion action mode. 1104 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 1105 mInsertionControllerEnabled) { 1106 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1107 mLastDownPositionY); 1108 Selection.setSelection((Spannable) mTextView.getText(), offset); 1109 getInsertionController().show(); 1110 mIsInsertionActionModeStartPending = true; 1111 handled = true; 1112 } 1113 1114 if (!handled && mTextActionMode != null) { 1115 if (touchPositionIsInSelection()) { 1116 startDragAndDrop(); 1117 } else { 1118 stopTextActionMode(); 1119 selectCurrentWordAndStartDrag(); 1120 } 1121 handled = true; 1122 } 1123 1124 // Start a new selection 1125 if (!handled) { 1126 handled = selectCurrentWordAndStartDrag(); 1127 } 1128 1129 return handled; 1130 } 1131 1132 private long getLastTouchOffsets() { 1133 SelectionModifierCursorController selectionController = getSelectionController(); 1134 final int minOffset = selectionController.getMinTouchOffset(); 1135 final int maxOffset = selectionController.getMaxTouchOffset(); 1136 return TextUtils.packRangeInLong(minOffset, maxOffset); 1137 } 1138 1139 void onFocusChanged(boolean focused, int direction) { 1140 mShowCursor = SystemClock.uptimeMillis(); 1141 ensureEndedBatchEdit(); 1142 1143 if (focused) { 1144 int selStart = mTextView.getSelectionStart(); 1145 int selEnd = mTextView.getSelectionEnd(); 1146 1147 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1148 // mode for these, unless there was a specific selection already started. 1149 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1150 selEnd == mTextView.getText().length(); 1151 1152 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1153 !isFocusHighlighted; 1154 1155 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1156 // If a tap was used to give focus to that view, move cursor at tap position. 1157 // Has to be done before onTakeFocus, which can be overloaded. 1158 final int lastTapPosition = getLastTapPosition(); 1159 if (lastTapPosition >= 0) { 1160 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1161 } 1162 1163 // Note this may have to be moved out of the Editor class 1164 MovementMethod mMovement = mTextView.getMovementMethod(); 1165 if (mMovement != null) { 1166 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1167 } 1168 1169 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1170 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1171 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1172 // This special case ensure that we keep current selection in that case. 1173 // It would be better to know why the DecorView does not have focus at that time. 1174 if (((mTextView.isInExtractedMode()) || mSelectionMoved) && 1175 selStart >= 0 && selEnd >= 0) { 1176 /* 1177 * Someone intentionally set the selection, so let them 1178 * do whatever it is that they wanted to do instead of 1179 * the default on-focus behavior. We reset the selection 1180 * here instead of just skipping the onTakeFocus() call 1181 * because some movement methods do something other than 1182 * just setting the selection in theirs and we still 1183 * need to go through that path. 1184 */ 1185 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1186 } 1187 1188 if (mSelectAllOnFocus) { 1189 mTextView.selectAllText(); 1190 } 1191 1192 mTouchFocusSelected = true; 1193 } 1194 1195 mFrozenWithFocus = false; 1196 mSelectionMoved = false; 1197 1198 if (mError != null) { 1199 showError(); 1200 } 1201 1202 makeBlink(); 1203 } else { 1204 if (mError != null) { 1205 hideError(); 1206 } 1207 // Don't leave us in the middle of a batch edit. 1208 mTextView.onEndBatchEdit(); 1209 1210 if (mTextView.isInExtractedMode()) { 1211 hideCursorAndSpanControllers(); 1212 stopTextActionModeWithPreservingSelection(); 1213 } else { 1214 hideCursorAndSpanControllers(); 1215 if (mTemporaryDetach) { 1216 stopTextActionModeWithPreservingSelection(); 1217 } else { 1218 stopTextActionMode(); 1219 } 1220 downgradeEasyCorrectionSpans(); 1221 } 1222 // No need to create the controller 1223 if (mSelectionModifierCursorController != null) { 1224 mSelectionModifierCursorController.resetTouchOffsets(); 1225 } 1226 } 1227 } 1228 1229 /** 1230 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1231 * span. 1232 */ 1233 private void downgradeEasyCorrectionSpans() { 1234 CharSequence text = mTextView.getText(); 1235 if (text instanceof Spannable) { 1236 Spannable spannable = (Spannable) text; 1237 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1238 spannable.length(), SuggestionSpan.class); 1239 for (int i = 0; i < suggestionSpans.length; i++) { 1240 int flags = suggestionSpans[i].getFlags(); 1241 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1242 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1243 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1244 suggestionSpans[i].setFlags(flags); 1245 } 1246 } 1247 } 1248 } 1249 1250 void sendOnTextChanged(int start, int after) { 1251 updateSpellCheckSpans(start, start + after, false); 1252 1253 // Flip flag to indicate the word iterator needs to have the text reset. 1254 mUpdateWordIteratorText = true; 1255 1256 // Hide the controllers as soon as text is modified (typing, procedural...) 1257 // We do not hide the span controllers, since they can be added when a new text is 1258 // inserted into the text view (voice IME). 1259 hideCursorControllers(); 1260 // Reset drag accelerator. 1261 if (mSelectionModifierCursorController != null) { 1262 mSelectionModifierCursorController.resetTouchOffsets(); 1263 } 1264 stopTextActionMode(); 1265 } 1266 1267 private int getLastTapPosition() { 1268 // No need to create the controller at that point, no last tap position saved 1269 if (mSelectionModifierCursorController != null) { 1270 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1271 if (lastTapPosition >= 0) { 1272 // Safety check, should not be possible. 1273 if (lastTapPosition > mTextView.getText().length()) { 1274 lastTapPosition = mTextView.getText().length(); 1275 } 1276 return lastTapPosition; 1277 } 1278 } 1279 1280 return -1; 1281 } 1282 1283 void onWindowFocusChanged(boolean hasWindowFocus) { 1284 if (hasWindowFocus) { 1285 if (mBlink != null) { 1286 mBlink.uncancel(); 1287 makeBlink(); 1288 } 1289 final InputMethodManager imm = InputMethodManager.peekInstance(); 1290 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1291 refreshTextActionMode(); 1292 } 1293 } else { 1294 if (mBlink != null) { 1295 mBlink.cancel(); 1296 } 1297 if (mInputContentType != null) { 1298 mInputContentType.enterDown = false; 1299 } 1300 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1301 hideCursorAndSpanControllers(); 1302 stopTextActionModeWithPreservingSelection(); 1303 if (mSuggestionsPopupWindow != null) { 1304 mSuggestionsPopupWindow.onParentLostFocus(); 1305 } 1306 1307 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1308 ensureEndedBatchEdit(); 1309 } 1310 } 1311 1312 private void updateTapState(MotionEvent event) { 1313 final int action = event.getActionMasked(); 1314 if (action == MotionEvent.ACTION_DOWN) { 1315 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1316 // Detect double tap and triple click. 1317 if (((mTapState == TAP_STATE_FIRST_TAP) 1318 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1319 && (SystemClock.uptimeMillis() - mLastTouchUpTime) <= 1320 ViewConfiguration.getDoubleTapTimeout()) { 1321 if (mTapState == TAP_STATE_FIRST_TAP) { 1322 mTapState = TAP_STATE_DOUBLE_TAP; 1323 } else { 1324 mTapState = TAP_STATE_TRIPLE_CLICK; 1325 } 1326 } else { 1327 mTapState = TAP_STATE_FIRST_TAP; 1328 } 1329 } 1330 if (action == MotionEvent.ACTION_UP) { 1331 mLastTouchUpTime = SystemClock.uptimeMillis(); 1332 } 1333 } 1334 1335 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1336 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1337 return false; 1338 } 1339 final boolean primaryButtonStateChanged = 1340 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1341 final int action = event.getActionMasked(); 1342 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1343 && !primaryButtonStateChanged) { 1344 return true; 1345 } 1346 if (action == MotionEvent.ACTION_MOVE 1347 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1348 return true; 1349 } 1350 return false; 1351 } 1352 1353 void onTouchEvent(MotionEvent event) { 1354 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1355 mLastButtonState = event.getButtonState(); 1356 if (filterOutEvent) { 1357 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1358 mDiscardNextActionUp = true; 1359 } 1360 return; 1361 } 1362 updateTapState(event); 1363 updateFloatingToolbarVisibility(event); 1364 1365 if (hasSelectionController()) { 1366 getSelectionController().onTouchEvent(event); 1367 } 1368 1369 if (mShowSuggestionRunnable != null) { 1370 mTextView.removeCallbacks(mShowSuggestionRunnable); 1371 mShowSuggestionRunnable = null; 1372 } 1373 1374 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1375 mLastDownPositionX = event.getX(); 1376 mLastDownPositionY = event.getY(); 1377 1378 // Reset this state; it will be re-set if super.onTouchEvent 1379 // causes focus to move to the view. 1380 mTouchFocusSelected = false; 1381 mIgnoreActionUpEvent = false; 1382 } 1383 } 1384 1385 private void updateFloatingToolbarVisibility(MotionEvent event) { 1386 if (mTextActionMode != null) { 1387 switch (event.getActionMasked()) { 1388 case MotionEvent.ACTION_MOVE: 1389 hideFloatingToolbar(); 1390 break; 1391 case MotionEvent.ACTION_UP: // fall through 1392 case MotionEvent.ACTION_CANCEL: 1393 showFloatingToolbar(); 1394 } 1395 } 1396 } 1397 1398 private void hideFloatingToolbar() { 1399 if (mTextActionMode != null) { 1400 mTextView.removeCallbacks(mShowFloatingToolbar); 1401 mTextActionMode.hide(ActionMode.DEFAULT_HIDE_DURATION); 1402 } 1403 } 1404 1405 private void showFloatingToolbar() { 1406 if (mTextActionMode != null) { 1407 // Delay "show" so it doesn't interfere with click confirmations 1408 // or double-clicks that could "dismiss" the floating toolbar. 1409 int delay = ViewConfiguration.getDoubleTapTimeout(); 1410 mTextView.postDelayed(mShowFloatingToolbar, delay); 1411 } 1412 } 1413 1414 public void beginBatchEdit() { 1415 mInBatchEditControllers = true; 1416 final InputMethodState ims = mInputMethodState; 1417 if (ims != null) { 1418 int nesting = ++ims.mBatchEditNesting; 1419 if (nesting == 1) { 1420 ims.mCursorChanged = false; 1421 ims.mChangedDelta = 0; 1422 if (ims.mContentChanged) { 1423 // We already have a pending change from somewhere else, 1424 // so turn this into a full update. 1425 ims.mChangedStart = 0; 1426 ims.mChangedEnd = mTextView.getText().length(); 1427 } else { 1428 ims.mChangedStart = EXTRACT_UNKNOWN; 1429 ims.mChangedEnd = EXTRACT_UNKNOWN; 1430 ims.mContentChanged = false; 1431 } 1432 mUndoInputFilter.beginBatchEdit(); 1433 mTextView.onBeginBatchEdit(); 1434 } 1435 } 1436 } 1437 1438 public void endBatchEdit() { 1439 mInBatchEditControllers = false; 1440 final InputMethodState ims = mInputMethodState; 1441 if (ims != null) { 1442 int nesting = --ims.mBatchEditNesting; 1443 if (nesting == 0) { 1444 finishBatchEdit(ims); 1445 } 1446 } 1447 } 1448 1449 void ensureEndedBatchEdit() { 1450 final InputMethodState ims = mInputMethodState; 1451 if (ims != null && ims.mBatchEditNesting != 0) { 1452 ims.mBatchEditNesting = 0; 1453 finishBatchEdit(ims); 1454 } 1455 } 1456 1457 void finishBatchEdit(final InputMethodState ims) { 1458 mTextView.onEndBatchEdit(); 1459 mUndoInputFilter.endBatchEdit(); 1460 1461 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1462 mTextView.updateAfterEdit(); 1463 reportExtractedText(); 1464 } else if (ims.mCursorChanged) { 1465 // Cheesy way to get us to report the current cursor location. 1466 mTextView.invalidateCursor(); 1467 } 1468 // sendUpdateSelection knows to avoid sending if the selection did 1469 // not actually change. 1470 sendUpdateSelection(); 1471 } 1472 1473 static final int EXTRACT_NOTHING = -2; 1474 static final int EXTRACT_UNKNOWN = -1; 1475 1476 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1477 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1478 EXTRACT_UNKNOWN, outText); 1479 } 1480 1481 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1482 int partialStartOffset, int partialEndOffset, int delta, 1483 @Nullable ExtractedText outText) { 1484 if (request == null || outText == null) { 1485 return false; 1486 } 1487 1488 final CharSequence content = mTextView.getText(); 1489 if (content == null) { 1490 return false; 1491 } 1492 1493 if (partialStartOffset != EXTRACT_NOTHING) { 1494 final int N = content.length(); 1495 if (partialStartOffset < 0) { 1496 outText.partialStartOffset = outText.partialEndOffset = -1; 1497 partialStartOffset = 0; 1498 partialEndOffset = N; 1499 } else { 1500 // Now use the delta to determine the actual amount of text 1501 // we need. 1502 partialEndOffset += delta; 1503 // Adjust offsets to ensure we contain full spans. 1504 if (content instanceof Spanned) { 1505 Spanned spanned = (Spanned)content; 1506 Object[] spans = spanned.getSpans(partialStartOffset, 1507 partialEndOffset, ParcelableSpan.class); 1508 int i = spans.length; 1509 while (i > 0) { 1510 i--; 1511 int j = spanned.getSpanStart(spans[i]); 1512 if (j < partialStartOffset) partialStartOffset = j; 1513 j = spanned.getSpanEnd(spans[i]); 1514 if (j > partialEndOffset) partialEndOffset = j; 1515 } 1516 } 1517 outText.partialStartOffset = partialStartOffset; 1518 outText.partialEndOffset = partialEndOffset - delta; 1519 1520 if (partialStartOffset > N) { 1521 partialStartOffset = N; 1522 } else if (partialStartOffset < 0) { 1523 partialStartOffset = 0; 1524 } 1525 if (partialEndOffset > N) { 1526 partialEndOffset = N; 1527 } else if (partialEndOffset < 0) { 1528 partialEndOffset = 0; 1529 } 1530 } 1531 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1532 outText.text = content.subSequence(partialStartOffset, 1533 partialEndOffset); 1534 } else { 1535 outText.text = TextUtils.substring(content, partialStartOffset, 1536 partialEndOffset); 1537 } 1538 } else { 1539 outText.partialStartOffset = 0; 1540 outText.partialEndOffset = 0; 1541 outText.text = ""; 1542 } 1543 outText.flags = 0; 1544 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1545 outText.flags |= ExtractedText.FLAG_SELECTING; 1546 } 1547 if (mTextView.isSingleLine()) { 1548 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1549 } 1550 outText.startOffset = 0; 1551 outText.selectionStart = mTextView.getSelectionStart(); 1552 outText.selectionEnd = mTextView.getSelectionEnd(); 1553 return true; 1554 } 1555 1556 boolean reportExtractedText() { 1557 final Editor.InputMethodState ims = mInputMethodState; 1558 if (ims != null) { 1559 final boolean contentChanged = ims.mContentChanged; 1560 if (contentChanged || ims.mSelectionModeChanged) { 1561 ims.mContentChanged = false; 1562 ims.mSelectionModeChanged = false; 1563 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1564 if (req != null) { 1565 InputMethodManager imm = InputMethodManager.peekInstance(); 1566 if (imm != null) { 1567 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1568 "Retrieving extracted start=" + ims.mChangedStart + 1569 " end=" + ims.mChangedEnd + 1570 " delta=" + ims.mChangedDelta); 1571 if (ims.mChangedStart < 0 && !contentChanged) { 1572 ims.mChangedStart = EXTRACT_NOTHING; 1573 } 1574 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1575 ims.mChangedDelta, ims.mExtractedText)) { 1576 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1577 "Reporting extracted start=" + 1578 ims.mExtractedText.partialStartOffset + 1579 " end=" + ims.mExtractedText.partialEndOffset + 1580 ": " + ims.mExtractedText.text); 1581 1582 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1583 ims.mChangedStart = EXTRACT_UNKNOWN; 1584 ims.mChangedEnd = EXTRACT_UNKNOWN; 1585 ims.mChangedDelta = 0; 1586 ims.mContentChanged = false; 1587 return true; 1588 } 1589 } 1590 } 1591 } 1592 } 1593 return false; 1594 } 1595 1596 private void sendUpdateSelection() { 1597 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1598 final InputMethodManager imm = InputMethodManager.peekInstance(); 1599 if (null != imm) { 1600 final int selectionStart = mTextView.getSelectionStart(); 1601 final int selectionEnd = mTextView.getSelectionEnd(); 1602 int candStart = -1; 1603 int candEnd = -1; 1604 if (mTextView.getText() instanceof Spannable) { 1605 final Spannable sp = (Spannable) mTextView.getText(); 1606 candStart = EditableInputConnection.getComposingSpanStart(sp); 1607 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1608 } 1609 // InputMethodManager#updateSelection skips sending the message if 1610 // none of the parameters have changed since the last time we called it. 1611 imm.updateSelection(mTextView, 1612 selectionStart, selectionEnd, candStart, candEnd); 1613 } 1614 } 1615 } 1616 1617 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1618 int cursorOffsetVertical) { 1619 final int selectionStart = mTextView.getSelectionStart(); 1620 final int selectionEnd = mTextView.getSelectionEnd(); 1621 1622 final InputMethodState ims = mInputMethodState; 1623 if (ims != null && ims.mBatchEditNesting == 0) { 1624 InputMethodManager imm = InputMethodManager.peekInstance(); 1625 if (imm != null) { 1626 if (imm.isActive(mTextView)) { 1627 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1628 // We are in extract mode and the content has changed 1629 // in some way... just report complete new text to the 1630 // input method. 1631 reportExtractedText(); 1632 } 1633 } 1634 } 1635 } 1636 1637 if (mCorrectionHighlighter != null) { 1638 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1639 } 1640 1641 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1642 drawCursor(canvas, cursorOffsetVertical); 1643 // Rely on the drawable entirely, do not draw the cursor line. 1644 // Has to be done after the IMM related code above which relies on the highlight. 1645 highlight = null; 1646 } 1647 1648 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1649 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1650 cursorOffsetVertical); 1651 } else { 1652 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1653 } 1654 } 1655 1656 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1657 Paint highlightPaint, int cursorOffsetVertical) { 1658 final long lineRange = layout.getLineRangeForDraw(canvas); 1659 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1660 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1661 if (lastLine < 0) return; 1662 1663 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1664 firstLine, lastLine); 1665 1666 if (layout instanceof DynamicLayout) { 1667 if (mTextRenderNodes == null) { 1668 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1669 } 1670 1671 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1672 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1673 int[] blockIndices = dynamicLayout.getBlockIndices(); 1674 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1675 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1676 1677 int endOfPreviousBlock = -1; 1678 int searchStartIndex = 0; 1679 for (int i = 0; i < numberOfBlocks; i++) { 1680 int blockEndLine = blockEndLines[i]; 1681 int blockIndex = blockIndices[i]; 1682 1683 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1684 if (blockIsInvalid) { 1685 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1686 searchStartIndex); 1687 // Note how dynamic layout's internal block indices get updated from Editor 1688 blockIndices[i] = blockIndex; 1689 if (mTextRenderNodes[blockIndex] != null) { 1690 mTextRenderNodes[blockIndex].isDirty = true; 1691 } 1692 searchStartIndex = blockIndex + 1; 1693 } 1694 1695 if (mTextRenderNodes[blockIndex] == null) { 1696 mTextRenderNodes[blockIndex] = 1697 new TextRenderNode("Text " + blockIndex); 1698 } 1699 1700 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1701 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1702 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1703 final int blockBeginLine = endOfPreviousBlock + 1; 1704 final int top = layout.getLineTop(blockBeginLine); 1705 final int bottom = layout.getLineBottom(blockEndLine); 1706 int left = 0; 1707 int right = mTextView.getWidth(); 1708 if (mTextView.getHorizontallyScrolling()) { 1709 float min = Float.MAX_VALUE; 1710 float max = Float.MIN_VALUE; 1711 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1712 min = Math.min(min, layout.getLineLeft(line)); 1713 max = Math.max(max, layout.getLineRight(line)); 1714 } 1715 left = (int) min; 1716 right = (int) (max + 0.5f); 1717 } 1718 1719 // Rebuild display list if it is invalid 1720 if (blockDisplayListIsInvalid) { 1721 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1722 right - left, bottom - top); 1723 try { 1724 // drawText is always relative to TextView's origin, this translation 1725 // brings this range of text back to the top left corner of the viewport 1726 displayListCanvas.translate(-left, -top); 1727 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1728 mTextRenderNodes[blockIndex].isDirty = false; 1729 // No need to untranslate, previous context is popped after 1730 // drawDisplayList 1731 } finally { 1732 blockDisplayList.end(displayListCanvas); 1733 // Same as drawDisplayList below, handled by our TextView's parent 1734 blockDisplayList.setClipToBounds(false); 1735 } 1736 } 1737 1738 // Valid disply list whose index is >= indexFirstChangedBlock 1739 // only needs to update its drawing location. 1740 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1741 } 1742 1743 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1744 1745 endOfPreviousBlock = blockEndLine; 1746 } 1747 1748 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1749 } else { 1750 // Boring layout is used for empty and hint text 1751 layout.drawText(canvas, firstLine, lastLine); 1752 } 1753 } 1754 1755 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1756 int searchStartIndex) { 1757 int length = mTextRenderNodes.length; 1758 for (int i = searchStartIndex; i < length; i++) { 1759 boolean blockIndexFound = false; 1760 for (int j = 0; j < numberOfBlocks; j++) { 1761 if (blockIndices[j] == i) { 1762 blockIndexFound = true; 1763 break; 1764 } 1765 } 1766 if (blockIndexFound) continue; 1767 return i; 1768 } 1769 1770 // No available index found, the pool has to grow 1771 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1772 return length; 1773 } 1774 1775 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1776 final boolean translate = cursorOffsetVertical != 0; 1777 if (translate) canvas.translate(0, cursorOffsetVertical); 1778 for (int i = 0; i < mCursorCount; i++) { 1779 mCursorDrawable[i].draw(canvas); 1780 } 1781 if (translate) canvas.translate(0, -cursorOffsetVertical); 1782 } 1783 1784 /** 1785 * Invalidates all the sub-display lists that overlap the specified character range 1786 */ 1787 void invalidateTextDisplayList(Layout layout, int start, int end) { 1788 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1789 final int firstLine = layout.getLineForOffset(start); 1790 final int lastLine = layout.getLineForOffset(end); 1791 1792 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1793 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1794 int[] blockIndices = dynamicLayout.getBlockIndices(); 1795 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1796 1797 int i = 0; 1798 // Skip the blocks before firstLine 1799 while (i < numberOfBlocks) { 1800 if (blockEndLines[i] >= firstLine) break; 1801 i++; 1802 } 1803 1804 // Invalidate all subsequent blocks until lastLine is passed 1805 while (i < numberOfBlocks) { 1806 final int blockIndex = blockIndices[i]; 1807 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1808 mTextRenderNodes[blockIndex].isDirty = true; 1809 } 1810 if (blockEndLines[i] >= lastLine) break; 1811 i++; 1812 } 1813 } 1814 } 1815 1816 void invalidateTextDisplayList() { 1817 if (mTextRenderNodes != null) { 1818 for (int i = 0; i < mTextRenderNodes.length; i++) { 1819 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1820 } 1821 } 1822 } 1823 1824 void updateCursorsPositions() { 1825 if (mTextView.mCursorDrawableRes == 0) { 1826 mCursorCount = 0; 1827 return; 1828 } 1829 1830 Layout layout = mTextView.getLayout(); 1831 final int offset = mTextView.getSelectionStart(); 1832 final int line = layout.getLineForOffset(offset); 1833 final int top = layout.getLineTop(line); 1834 final int bottom = layout.getLineTop(line + 1); 1835 1836 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1837 1838 int middle = bottom; 1839 if (mCursorCount == 2) { 1840 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1841 middle = (top + bottom) >> 1; 1842 } 1843 1844 boolean clamped = layout.shouldClampCursor(line); 1845 updateCursorPosition(0, top, middle, layout.getPrimaryHorizontal(offset, clamped)); 1846 1847 if (mCursorCount == 2) { 1848 updateCursorPosition(1, middle, bottom, layout.getSecondaryHorizontal(offset, clamped)); 1849 } 1850 } 1851 1852 void refreshTextActionMode() { 1853 if (extractedTextModeWillBeStarted()) { 1854 mRestartActionModeOnNextRefresh = false; 1855 return; 1856 } 1857 final boolean hasSelection = mTextView.hasSelection(); 1858 final SelectionModifierCursorController selectionController = getSelectionController(); 1859 final InsertionPointCursorController insertionController = getInsertionController(); 1860 if ((selectionController != null && selectionController.isCursorBeingModified()) 1861 || (insertionController != null && insertionController.isCursorBeingModified())) { 1862 // ActionMode should be managed by the currently active cursor controller. 1863 mRestartActionModeOnNextRefresh = false; 1864 return; 1865 } 1866 if (hasSelection) { 1867 hideInsertionPointCursorController(); 1868 if (mTextActionMode == null) { 1869 if (mRestartActionModeOnNextRefresh) { 1870 // To avoid distraction, newly start action mode only when selection action 1871 // mode is being restarted. 1872 startSelectionActionMode(); 1873 } 1874 } else if (selectionController == null || !selectionController.isActive()) { 1875 // Insertion action mode is active. Avoid dismissing the selection. 1876 stopTextActionModeWithPreservingSelection(); 1877 startSelectionActionMode(); 1878 } else { 1879 mTextActionMode.invalidateContentRect(); 1880 } 1881 } else { 1882 // Insertion action mode is started only when insertion controller is explicitly 1883 // activated. 1884 if (insertionController == null || !insertionController.isActive()) { 1885 stopTextActionMode(); 1886 } else if (mTextActionMode != null) { 1887 mTextActionMode.invalidateContentRect(); 1888 } 1889 } 1890 mRestartActionModeOnNextRefresh = false; 1891 } 1892 1893 /** 1894 * Start an Insertion action mode. 1895 */ 1896 void startInsertionActionMode() { 1897 if (mInsertionActionModeRunnable != null) { 1898 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1899 } 1900 if (extractedTextModeWillBeStarted()) { 1901 return; 1902 } 1903 stopTextActionMode(); 1904 1905 ActionMode.Callback actionModeCallback = 1906 new TextActionModeCallback(false /* hasSelection */); 1907 mTextActionMode = mTextView.startActionMode( 1908 actionModeCallback, ActionMode.TYPE_FLOATING); 1909 if (mTextActionMode != null && getInsertionController() != null) { 1910 getInsertionController().show(); 1911 } 1912 } 1913 1914 /** 1915 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1916 * are shown if there is a selection. This should be used when the mode is started from a 1917 * non-touch event. 1918 * 1919 * @return true if the selection mode was actually started. 1920 */ 1921 boolean startSelectionActionMode() { 1922 boolean selectionStarted = startSelectionActionModeInternal(); 1923 if (selectionStarted) { 1924 getSelectionController().show(); 1925 } 1926 mRestartActionModeOnNextRefresh = false; 1927 return selectionStarted; 1928 } 1929 1930 /** 1931 * If the TextView allows text selection, selects the current word when no existing selection 1932 * was available and starts a drag. 1933 * 1934 * @return true if the drag was started. 1935 */ 1936 private boolean selectCurrentWordAndStartDrag() { 1937 if (mInsertionActionModeRunnable != null) { 1938 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1939 } 1940 if (extractedTextModeWillBeStarted()) { 1941 return false; 1942 } 1943 if (!checkField()) { 1944 return false; 1945 } 1946 if (!mTextView.hasSelection() && !selectCurrentWord()) { 1947 // No selection and cannot select a word. 1948 return false; 1949 } 1950 stopTextActionModeWithPreservingSelection(); 1951 getSelectionController().enterDrag( 1952 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 1953 return true; 1954 } 1955 1956 /** 1957 * Checks whether a selection can be performed on the current TextView. 1958 * 1959 * @return true if a selection can be performed 1960 */ 1961 boolean checkField() { 1962 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1963 Log.w(TextView.LOG_TAG, 1964 "TextView does not support text selection. Selection cancelled."); 1965 return false; 1966 } 1967 return true; 1968 } 1969 1970 private boolean startSelectionActionModeInternal() { 1971 if (extractedTextModeWillBeStarted()) { 1972 return false; 1973 } 1974 if (mTextActionMode != null) { 1975 // Text action mode is already started 1976 mTextActionMode.invalidate(); 1977 return false; 1978 } 1979 1980 if (!checkField() || !mTextView.hasSelection()) { 1981 return false; 1982 } 1983 1984 ActionMode.Callback actionModeCallback = 1985 new TextActionModeCallback(true /* hasSelection */); 1986 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 1987 1988 final boolean selectionStarted = mTextActionMode != null; 1989 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1990 // Show the IME to be able to replace text, except when selecting non editable text. 1991 final InputMethodManager imm = InputMethodManager.peekInstance(); 1992 if (imm != null) { 1993 imm.showSoftInput(mTextView, 0, null); 1994 } 1995 } 1996 return selectionStarted; 1997 } 1998 1999 boolean extractedTextModeWillBeStarted() { 2000 if (!(mTextView.isInExtractedMode())) { 2001 final InputMethodManager imm = InputMethodManager.peekInstance(); 2002 return imm != null && imm.isFullscreenMode(); 2003 } 2004 return false; 2005 } 2006 2007 /** 2008 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2009 * the current cursor position or selection range. This method is consistent with the 2010 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2011 */ 2012 private boolean shouldOfferToShowSuggestions() { 2013 CharSequence text = mTextView.getText(); 2014 if (!(text instanceof Spannable)) return false; 2015 2016 final Spannable spannable = (Spannable) text; 2017 final int selectionStart = mTextView.getSelectionStart(); 2018 final int selectionEnd = mTextView.getSelectionEnd(); 2019 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2020 SuggestionSpan.class); 2021 if (suggestionSpans.length == 0) { 2022 return false; 2023 } 2024 if (selectionStart == selectionEnd) { 2025 // Spans overlap the cursor. 2026 for (int i = 0; i < suggestionSpans.length; i++) { 2027 if (suggestionSpans[i].getSuggestions().length > 0) { 2028 return true; 2029 } 2030 } 2031 return false; 2032 } 2033 int minSpanStart = mTextView.getText().length(); 2034 int maxSpanEnd = 0; 2035 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2036 int unionOfSpansCoveringSelectionStartEnd = 0; 2037 boolean hasValidSuggestions = false; 2038 for (int i = 0; i < suggestionSpans.length; i++) { 2039 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2040 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2041 minSpanStart = Math.min(minSpanStart, spanStart); 2042 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2043 if (selectionStart < spanStart || selectionStart > spanEnd) { 2044 // The span doesn't cover the current selection start point. 2045 continue; 2046 } 2047 hasValidSuggestions = 2048 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2049 unionOfSpansCoveringSelectionStartStart = 2050 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2051 unionOfSpansCoveringSelectionStartEnd = 2052 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2053 } 2054 if (!hasValidSuggestions) { 2055 return false; 2056 } 2057 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2058 // No spans cover the selection start point. 2059 return false; 2060 } 2061 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2062 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2063 // There is a span that is not covered by the union. In this case, we soouldn't offer 2064 // to show suggestions as it's confusing. 2065 return false; 2066 } 2067 return true; 2068 } 2069 2070 /** 2071 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2072 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2073 */ 2074 private boolean isCursorInsideEasyCorrectionSpan() { 2075 Spannable spannable = (Spannable) mTextView.getText(); 2076 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2077 mTextView.getSelectionEnd(), SuggestionSpan.class); 2078 for (int i = 0; i < suggestionSpans.length; i++) { 2079 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2080 return true; 2081 } 2082 } 2083 return false; 2084 } 2085 2086 void onTouchUpEvent(MotionEvent event) { 2087 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2088 hideCursorAndSpanControllers(); 2089 stopTextActionMode(); 2090 CharSequence text = mTextView.getText(); 2091 if (!selectAllGotFocus && text.length() > 0) { 2092 // Move cursor 2093 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2094 Selection.setSelection((Spannable) text, offset); 2095 if (mSpellChecker != null) { 2096 // When the cursor moves, the word that was typed may need spell check 2097 mSpellChecker.onSelectionChanged(); 2098 } 2099 2100 if (!extractedTextModeWillBeStarted()) { 2101 if (isCursorInsideEasyCorrectionSpan()) { 2102 // Cancel the single tap delayed runnable. 2103 if (mInsertionActionModeRunnable != null) { 2104 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2105 } 2106 2107 mShowSuggestionRunnable = new Runnable() { 2108 public void run() { 2109 replace(); 2110 } 2111 }; 2112 // removeCallbacks is performed on every touch 2113 mTextView.postDelayed(mShowSuggestionRunnable, 2114 ViewConfiguration.getDoubleTapTimeout()); 2115 } else if (hasInsertionController()) { 2116 getInsertionController().show(); 2117 } 2118 } 2119 } 2120 } 2121 2122 protected void stopTextActionMode() { 2123 if (mTextActionMode != null) { 2124 // This will hide the mSelectionModifierCursorController 2125 mTextActionMode.finish(); 2126 } 2127 } 2128 2129 private void stopTextActionModeWithPreservingSelection() { 2130 if (mTextActionMode != null) { 2131 mRestartActionModeOnNextRefresh = true; 2132 } 2133 mPreserveSelection = true; 2134 stopTextActionMode(); 2135 mPreserveSelection = false; 2136 } 2137 2138 /** 2139 * @return True if this view supports insertion handles. 2140 */ 2141 boolean hasInsertionController() { 2142 return mInsertionControllerEnabled; 2143 } 2144 2145 /** 2146 * @return True if this view supports selection handles. 2147 */ 2148 boolean hasSelectionController() { 2149 return mSelectionControllerEnabled; 2150 } 2151 2152 InsertionPointCursorController getInsertionController() { 2153 if (!mInsertionControllerEnabled) { 2154 return null; 2155 } 2156 2157 if (mInsertionPointCursorController == null) { 2158 mInsertionPointCursorController = new InsertionPointCursorController(); 2159 2160 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2161 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2162 } 2163 2164 return mInsertionPointCursorController; 2165 } 2166 2167 SelectionModifierCursorController getSelectionController() { 2168 if (!mSelectionControllerEnabled) { 2169 return null; 2170 } 2171 2172 if (mSelectionModifierCursorController == null) { 2173 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2174 2175 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2176 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2177 } 2178 2179 return mSelectionModifierCursorController; 2180 } 2181 2182 /** 2183 * @hide 2184 */ 2185 @VisibleForTesting 2186 public Drawable[] getCursorDrawable() { 2187 return mCursorDrawable; 2188 } 2189 2190 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2191 if (mCursorDrawable[cursorIndex] == null) 2192 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2193 mTextView.mCursorDrawableRes); 2194 final Drawable drawable = mCursorDrawable[cursorIndex]; 2195 final int left = clampHorizontalPosition(drawable, horizontal); 2196 final int width = drawable.getIntrinsicWidth(); 2197 drawable.setBounds(left, top - mTempRect.top, left + width, 2198 bottom + mTempRect.bottom); 2199 } 2200 2201 /** 2202 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2203 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2204 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2205 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2206 * of the view. 2207 * 2208 * @param drawable Drawable. Can be null. 2209 * @param horizontal Horizontal position for the drawable. 2210 * @return The clamped horizontal position for the drawable. 2211 */ 2212 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2213 horizontal = Math.max(0.5f, horizontal - 0.5f); 2214 if (mTempRect == null) mTempRect = new Rect(); 2215 2216 int drawableWidth = 0; 2217 if (drawable != null) { 2218 drawable.getPadding(mTempRect); 2219 drawableWidth = drawable.getIntrinsicWidth(); 2220 } else { 2221 mTempRect.setEmpty(); 2222 } 2223 2224 int scrollX = mTextView.getScrollX(); 2225 float horizontalDiff = horizontal - scrollX; 2226 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2227 - mTextView.getCompoundPaddingRight(); 2228 2229 final int left; 2230 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2231 // at the rightmost position 2232 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2233 } else if (Math.abs(horizontalDiff) <= 1f || 2234 (TextUtils.isEmpty(mTextView.getText()) 2235 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2236 && horizontal <= 1f)) { 2237 // at the leftmost position 2238 left = scrollX - mTempRect.left; 2239 } else { 2240 left = (int) horizontal - mTempRect.left; 2241 } 2242 return left; 2243 } 2244 2245 /** 2246 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2247 * a dictionary) from the current input method, provided by it calling 2248 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2249 * implementation flashes the background of the corrected word to provide feedback to the user. 2250 * 2251 * @param info The auto correct info about the text that was corrected. 2252 */ 2253 public void onCommitCorrection(CorrectionInfo info) { 2254 if (mCorrectionHighlighter == null) { 2255 mCorrectionHighlighter = new CorrectionHighlighter(); 2256 } else { 2257 mCorrectionHighlighter.invalidate(false); 2258 } 2259 2260 mCorrectionHighlighter.highlight(info); 2261 } 2262 2263 void onScrollChanged() { 2264 if (mPositionListener != null) { 2265 mPositionListener.onScrollChanged(); 2266 } 2267 if (mTextActionMode != null) { 2268 mTextActionMode.invalidateContentRect(); 2269 } 2270 } 2271 2272 /** 2273 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2274 */ 2275 private boolean shouldBlink() { 2276 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2277 2278 final int start = mTextView.getSelectionStart(); 2279 if (start < 0) return false; 2280 2281 final int end = mTextView.getSelectionEnd(); 2282 if (end < 0) return false; 2283 2284 return start == end; 2285 } 2286 2287 void makeBlink() { 2288 if (shouldBlink()) { 2289 mShowCursor = SystemClock.uptimeMillis(); 2290 if (mBlink == null) mBlink = new Blink(); 2291 mTextView.removeCallbacks(mBlink); 2292 mTextView.postDelayed(mBlink, BLINK); 2293 } else { 2294 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2295 } 2296 } 2297 2298 private class Blink implements Runnable { 2299 private boolean mCancelled; 2300 2301 public void run() { 2302 if (mCancelled) { 2303 return; 2304 } 2305 2306 mTextView.removeCallbacks(this); 2307 2308 if (shouldBlink()) { 2309 if (mTextView.getLayout() != null) { 2310 mTextView.invalidateCursorPath(); 2311 } 2312 2313 mTextView.postDelayed(this, BLINK); 2314 } 2315 } 2316 2317 void cancel() { 2318 if (!mCancelled) { 2319 mTextView.removeCallbacks(this); 2320 mCancelled = true; 2321 } 2322 } 2323 2324 void uncancel() { 2325 mCancelled = false; 2326 } 2327 } 2328 2329 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2330 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2331 com.android.internal.R.layout.text_drag_thumbnail, null); 2332 2333 if (shadowView == null) { 2334 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2335 } 2336 2337 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2338 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2339 end = TextUtils.unpackRangeEndFromLong(range); 2340 } 2341 final CharSequence text = mTextView.getTransformedText(start, end); 2342 shadowView.setText(text); 2343 shadowView.setTextColor(mTextView.getTextColors()); 2344 2345 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2346 shadowView.setGravity(Gravity.CENTER); 2347 2348 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2349 ViewGroup.LayoutParams.WRAP_CONTENT)); 2350 2351 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2352 shadowView.measure(size, size); 2353 2354 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2355 shadowView.invalidate(); 2356 return new DragShadowBuilder(shadowView); 2357 } 2358 2359 private static class DragLocalState { 2360 public TextView sourceTextView; 2361 public int start, end; 2362 2363 public DragLocalState(TextView sourceTextView, int start, int end) { 2364 this.sourceTextView = sourceTextView; 2365 this.start = start; 2366 this.end = end; 2367 } 2368 } 2369 2370 void onDrop(DragEvent event) { 2371 StringBuilder content = new StringBuilder(""); 2372 2373 final DropPermissions dropPermissions = DropPermissions.obtain(event); 2374 if (dropPermissions != null) { 2375 dropPermissions.takeTransient(); 2376 } 2377 2378 try { 2379 ClipData clipData = event.getClipData(); 2380 final int itemCount = clipData.getItemCount(); 2381 for (int i=0; i < itemCount; i++) { 2382 Item item = clipData.getItemAt(i); 2383 content.append(item.coerceToStyledText(mTextView.getContext())); 2384 } 2385 } 2386 finally { 2387 if (dropPermissions != null) { 2388 dropPermissions.release(); 2389 } 2390 } 2391 2392 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2393 2394 Object localState = event.getLocalState(); 2395 DragLocalState dragLocalState = null; 2396 if (localState instanceof DragLocalState) { 2397 dragLocalState = (DragLocalState) localState; 2398 } 2399 boolean dragDropIntoItself = dragLocalState != null && 2400 dragLocalState.sourceTextView == mTextView; 2401 2402 if (dragDropIntoItself) { 2403 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2404 // A drop inside the original selection discards the drop. 2405 return; 2406 } 2407 } 2408 2409 final int originalLength = mTextView.getText().length(); 2410 int min = offset; 2411 int max = offset; 2412 2413 Selection.setSelection((Spannable) mTextView.getText(), max); 2414 mTextView.replaceText_internal(min, max, content); 2415 2416 if (dragDropIntoItself) { 2417 int dragSourceStart = dragLocalState.start; 2418 int dragSourceEnd = dragLocalState.end; 2419 if (max <= dragSourceStart) { 2420 // Inserting text before selection has shifted positions 2421 final int shift = mTextView.getText().length() - originalLength; 2422 dragSourceStart += shift; 2423 dragSourceEnd += shift; 2424 } 2425 2426 mUndoInputFilter.setForceMerge(true); 2427 try { 2428 // Delete original selection 2429 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2430 2431 // Make sure we do not leave two adjacent spaces. 2432 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2433 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2434 if (nextCharIdx > prevCharIdx + 1) { 2435 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2436 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2437 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2438 } 2439 } 2440 } finally { 2441 mUndoInputFilter.setForceMerge(false); 2442 } 2443 } 2444 } 2445 2446 public void addSpanWatchers(Spannable text) { 2447 final int textLength = text.length(); 2448 2449 if (mKeyListener != null) { 2450 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2451 } 2452 2453 if (mSpanController == null) { 2454 mSpanController = new SpanController(); 2455 } 2456 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2457 } 2458 2459 void setContextMenuAnchor(float x, float y) { 2460 mContextMenuAnchorX = x; 2461 mContextMenuAnchorY = y; 2462 } 2463 2464 void onCreateContextMenu(ContextMenu menu) { 2465 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2466 || Float.isNaN(mContextMenuAnchorY)) { 2467 return; 2468 } 2469 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2470 if (offset == -1) { 2471 return; 2472 } 2473 stopTextActionModeWithPreservingSelection(); 2474 final boolean isOnSelection = mTextView.hasSelection() 2475 && offset >= mTextView.getSelectionStart() && offset <= mTextView.getSelectionEnd(); 2476 if (!isOnSelection) { 2477 // Right clicked position is not on the selection. Remove the selection and move the 2478 // cursor to the right clicked position. 2479 Selection.setSelection((Spannable) mTextView.getText(), offset); 2480 stopTextActionMode(); 2481 } 2482 2483 if (shouldOfferToShowSuggestions()) { 2484 final SuggestionInfo[] suggestionInfoArray = 2485 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2486 for (int i = 0; i < suggestionInfoArray.length; i++) { 2487 suggestionInfoArray[i] = new SuggestionInfo(); 2488 } 2489 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2490 com.android.internal.R.string.replace); 2491 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2492 for (int i = 0; i < numItems; i++) { 2493 final SuggestionInfo info = suggestionInfoArray[i]; 2494 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2495 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2496 @Override 2497 public boolean onMenuItemClick(MenuItem item) { 2498 replaceWithSuggestion(info); 2499 return true; 2500 } 2501 }); 2502 } 2503 } 2504 2505 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2506 com.android.internal.R.string.undo) 2507 .setAlphabeticShortcut('z') 2508 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2509 .setEnabled(mTextView.canUndo()); 2510 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2511 com.android.internal.R.string.redo) 2512 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2513 .setEnabled(mTextView.canRedo()); 2514 2515 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2516 com.android.internal.R.string.cut) 2517 .setAlphabeticShortcut('x') 2518 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2519 .setEnabled(mTextView.canCut()); 2520 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2521 com.android.internal.R.string.copy) 2522 .setAlphabeticShortcut('c') 2523 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2524 .setEnabled(mTextView.canCopy()); 2525 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2526 com.android.internal.R.string.paste) 2527 .setAlphabeticShortcut('v') 2528 .setEnabled(mTextView.canPaste()) 2529 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2530 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2531 com.android.internal.R.string.paste_as_plain_text) 2532 .setEnabled(mTextView.canPaste()) 2533 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2534 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2535 com.android.internal.R.string.share) 2536 .setEnabled(mTextView.canShare()) 2537 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2538 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2539 com.android.internal.R.string.selectAll) 2540 .setAlphabeticShortcut('a') 2541 .setEnabled(mTextView.canSelectAllText()) 2542 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2543 2544 mPreserveSelection = true; 2545 } 2546 2547 @Nullable 2548 private SuggestionSpan findEquivalentSuggestionSpan( 2549 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2550 final Editable editable = (Editable) mTextView.getText(); 2551 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2552 // Exactly same span is found. 2553 return suggestionSpanInfo.mSuggestionSpan; 2554 } 2555 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2556 // contents. 2557 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2558 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2559 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2560 final int start = editable.getSpanStart(suggestionSpan); 2561 if (start != suggestionSpanInfo.mSpanStart) { 2562 continue; 2563 } 2564 final int end = editable.getSpanEnd(suggestionSpan); 2565 if (end != suggestionSpanInfo.mSpanEnd) { 2566 continue; 2567 } 2568 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2569 return suggestionSpan; 2570 } 2571 } 2572 return null; 2573 } 2574 2575 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2576 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2577 suggestionInfo.mSuggestionSpanInfo); 2578 if (targetSuggestionSpan == null) { 2579 // Span has been removed 2580 return; 2581 } 2582 final Editable editable = (Editable) mTextView.getText(); 2583 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2584 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2585 if (spanStart < 0 || spanEnd <= spanStart) { 2586 // Span has been removed 2587 return; 2588 } 2589 2590 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2591 // SuggestionSpans are removed by replace: save them before 2592 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2593 SuggestionSpan.class); 2594 final int length = suggestionSpans.length; 2595 int[] suggestionSpansStarts = new int[length]; 2596 int[] suggestionSpansEnds = new int[length]; 2597 int[] suggestionSpansFlags = new int[length]; 2598 for (int i = 0; i < length; i++) { 2599 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2600 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2601 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2602 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2603 2604 // Remove potential misspelled flags 2605 int suggestionSpanFlags = suggestionSpan.getFlags(); 2606 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2607 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2608 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2609 suggestionSpan.setFlags(suggestionSpanFlags); 2610 } 2611 } 2612 2613 // Notify source IME of the suggestion pick. Do this before swapping texts. 2614 targetSuggestionSpan.notifySelection( 2615 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2616 2617 // Swap text content between actual text and Suggestion span 2618 final int suggestionStart = suggestionInfo.mSuggestionStart; 2619 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2620 final String suggestion = suggestionInfo.mText.subSequence( 2621 suggestionStart, suggestionEnd).toString(); 2622 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2623 2624 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2625 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2626 2627 // Restore previous SuggestionSpans 2628 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2629 for (int i = 0; i < length; i++) { 2630 // Only spans that include the modified region make sense after replacement 2631 // Spans partially included in the replaced region are removed, there is no 2632 // way to assign them a valid range after replacement 2633 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2634 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2635 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2636 } 2637 } 2638 // Move cursor at the end of the replaced word 2639 final int newCursorPosition = spanEnd + lengthDelta; 2640 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2641 } 2642 2643 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2644 new MenuItem.OnMenuItemClickListener() { 2645 @Override 2646 public boolean onMenuItemClick(MenuItem item) { 2647 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2648 return true; 2649 } 2650 return mTextView.onTextContextMenuItem(item.getItemId()); 2651 } 2652 }; 2653 2654 /** 2655 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2656 * pop-up should be displayed. 2657 * Also monitors {@link Selection} to call back to the attached input method. 2658 */ 2659 class SpanController implements SpanWatcher { 2660 2661 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2662 2663 private EasyEditPopupWindow mPopupWindow; 2664 2665 private Runnable mHidePopup; 2666 2667 // This function is pure but inner classes can't have static functions 2668 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2669 final Object span) { 2670 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2671 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2672 } 2673 2674 @Override 2675 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2676 if (isNonIntermediateSelectionSpan(text, span)) { 2677 sendUpdateSelection(); 2678 } else if (span instanceof EasyEditSpan) { 2679 if (mPopupWindow == null) { 2680 mPopupWindow = new EasyEditPopupWindow(); 2681 mHidePopup = new Runnable() { 2682 @Override 2683 public void run() { 2684 hide(); 2685 } 2686 }; 2687 } 2688 2689 // Make sure there is only at most one EasyEditSpan in the text 2690 if (mPopupWindow.mEasyEditSpan != null) { 2691 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2692 } 2693 2694 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2695 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2696 @Override 2697 public void onDeleteClick(EasyEditSpan span) { 2698 Editable editable = (Editable) mTextView.getText(); 2699 int start = editable.getSpanStart(span); 2700 int end = editable.getSpanEnd(span); 2701 if (start >= 0 && end >= 0) { 2702 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2703 mTextView.deleteText_internal(start, end); 2704 } 2705 editable.removeSpan(span); 2706 } 2707 }); 2708 2709 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2710 // The window is not visible yet, ignore the text change. 2711 return; 2712 } 2713 2714 if (mTextView.getLayout() == null) { 2715 // The view has not been laid out yet, ignore the text change 2716 return; 2717 } 2718 2719 if (extractedTextModeWillBeStarted()) { 2720 // The input is in extract mode. Do not handle the easy edit in 2721 // the original TextView, as the ExtractEditText will do 2722 return; 2723 } 2724 2725 mPopupWindow.show(); 2726 mTextView.removeCallbacks(mHidePopup); 2727 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2728 } 2729 } 2730 2731 @Override 2732 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2733 if (isNonIntermediateSelectionSpan(text, span)) { 2734 sendUpdateSelection(); 2735 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2736 hide(); 2737 } 2738 } 2739 2740 @Override 2741 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2742 int newStart, int newEnd) { 2743 if (isNonIntermediateSelectionSpan(text, span)) { 2744 sendUpdateSelection(); 2745 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2746 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2747 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2748 text.removeSpan(easyEditSpan); 2749 } 2750 } 2751 2752 public void hide() { 2753 if (mPopupWindow != null) { 2754 mPopupWindow.hide(); 2755 mTextView.removeCallbacks(mHidePopup); 2756 } 2757 } 2758 2759 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2760 try { 2761 PendingIntent pendingIntent = span.getPendingIntent(); 2762 if (pendingIntent != null) { 2763 Intent intent = new Intent(); 2764 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2765 pendingIntent.send(mTextView.getContext(), 0, intent); 2766 } 2767 } catch (CanceledException e) { 2768 // This should not happen, as we should try to send the intent only once. 2769 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2770 } 2771 } 2772 } 2773 2774 /** 2775 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2776 */ 2777 private interface EasyEditDeleteListener { 2778 2779 /** 2780 * Clicks the delete pop-up. 2781 */ 2782 void onDeleteClick(EasyEditSpan span); 2783 } 2784 2785 /** 2786 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2787 * by {@link SpanController}. 2788 */ 2789 private class EasyEditPopupWindow extends PinnedPopupWindow 2790 implements OnClickListener { 2791 private static final int POPUP_TEXT_LAYOUT = 2792 com.android.internal.R.layout.text_edit_action_popup_text; 2793 private TextView mDeleteTextView; 2794 private EasyEditSpan mEasyEditSpan; 2795 private EasyEditDeleteListener mOnDeleteListener; 2796 2797 @Override 2798 protected void createPopupWindow() { 2799 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2800 com.android.internal.R.attr.textSelectHandleWindowStyle); 2801 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2802 mPopupWindow.setClippingEnabled(true); 2803 } 2804 2805 @Override 2806 protected void initContentView() { 2807 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2808 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2809 mContentView = linearLayout; 2810 mContentView.setBackgroundResource( 2811 com.android.internal.R.drawable.text_edit_side_paste_window); 2812 2813 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2814 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2815 2816 LayoutParams wrapContent = new LayoutParams( 2817 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2818 2819 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2820 mDeleteTextView.setLayoutParams(wrapContent); 2821 mDeleteTextView.setText(com.android.internal.R.string.delete); 2822 mDeleteTextView.setOnClickListener(this); 2823 mContentView.addView(mDeleteTextView); 2824 } 2825 2826 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2827 mEasyEditSpan = easyEditSpan; 2828 } 2829 2830 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2831 mOnDeleteListener = listener; 2832 } 2833 2834 @Override 2835 public void onClick(View view) { 2836 if (view == mDeleteTextView 2837 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2838 && mOnDeleteListener != null) { 2839 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2840 } 2841 } 2842 2843 @Override 2844 public void hide() { 2845 if (mEasyEditSpan != null) { 2846 mEasyEditSpan.setDeleteEnabled(false); 2847 } 2848 mOnDeleteListener = null; 2849 super.hide(); 2850 } 2851 2852 @Override 2853 protected int getTextOffset() { 2854 // Place the pop-up at the end of the span 2855 Editable editable = (Editable) mTextView.getText(); 2856 return editable.getSpanEnd(mEasyEditSpan); 2857 } 2858 2859 @Override 2860 protected int getVerticalLocalPosition(int line) { 2861 return mTextView.getLayout().getLineBottom(line); 2862 } 2863 2864 @Override 2865 protected int clipVertically(int positionY) { 2866 // As we display the pop-up below the span, no vertical clipping is required. 2867 return positionY; 2868 } 2869 } 2870 2871 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2872 // 3 handles 2873 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2874 // 1 CursorAnchorInfoNotifier 2875 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2876 private TextViewPositionListener[] mPositionListeners = 2877 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2878 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2879 private boolean mPositionHasChanged = true; 2880 // Absolute position of the TextView with respect to its parent window 2881 private int mPositionX, mPositionY; 2882 private int mNumberOfListeners; 2883 private boolean mScrollHasChanged; 2884 final int[] mTempCoords = new int[2]; 2885 2886 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2887 if (mNumberOfListeners == 0) { 2888 updatePosition(); 2889 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2890 vto.addOnPreDrawListener(this); 2891 } 2892 2893 int emptySlotIndex = -1; 2894 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2895 TextViewPositionListener listener = mPositionListeners[i]; 2896 if (listener == positionListener) { 2897 return; 2898 } else if (emptySlotIndex < 0 && listener == null) { 2899 emptySlotIndex = i; 2900 } 2901 } 2902 2903 mPositionListeners[emptySlotIndex] = positionListener; 2904 mCanMove[emptySlotIndex] = canMove; 2905 mNumberOfListeners++; 2906 } 2907 2908 public void removeSubscriber(TextViewPositionListener positionListener) { 2909 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2910 if (mPositionListeners[i] == positionListener) { 2911 mPositionListeners[i] = null; 2912 mNumberOfListeners--; 2913 break; 2914 } 2915 } 2916 2917 if (mNumberOfListeners == 0) { 2918 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2919 vto.removeOnPreDrawListener(this); 2920 } 2921 } 2922 2923 public int getPositionX() { 2924 return mPositionX; 2925 } 2926 2927 public int getPositionY() { 2928 return mPositionY; 2929 } 2930 2931 @Override 2932 public boolean onPreDraw() { 2933 updatePosition(); 2934 2935 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2936 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2937 TextViewPositionListener positionListener = mPositionListeners[i]; 2938 if (positionListener != null) { 2939 positionListener.updatePosition(mPositionX, mPositionY, 2940 mPositionHasChanged, mScrollHasChanged); 2941 } 2942 } 2943 } 2944 2945 mScrollHasChanged = false; 2946 return true; 2947 } 2948 2949 private void updatePosition() { 2950 mTextView.getLocationInWindow(mTempCoords); 2951 2952 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2953 2954 mPositionX = mTempCoords[0]; 2955 mPositionY = mTempCoords[1]; 2956 } 2957 2958 public void onScrollChanged() { 2959 mScrollHasChanged = true; 2960 } 2961 } 2962 2963 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2964 protected PopupWindow mPopupWindow; 2965 protected ViewGroup mContentView; 2966 int mPositionX, mPositionY; 2967 int mClippingLimitLeft, mClippingLimitRight; 2968 2969 protected abstract void createPopupWindow(); 2970 protected abstract void initContentView(); 2971 protected abstract int getTextOffset(); 2972 protected abstract int getVerticalLocalPosition(int line); 2973 protected abstract int clipVertically(int positionY); 2974 2975 public PinnedPopupWindow() { 2976 createPopupWindow(); 2977 2978 mPopupWindow.setWindowLayoutType( 2979 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2980 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2981 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2982 2983 initContentView(); 2984 2985 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2986 ViewGroup.LayoutParams.WRAP_CONTENT); 2987 mContentView.setLayoutParams(wrapContent); 2988 2989 mPopupWindow.setContentView(mContentView); 2990 } 2991 2992 public void show() { 2993 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2994 2995 computeLocalPosition(); 2996 2997 final PositionListener positionListener = getPositionListener(); 2998 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2999 } 3000 3001 protected void measureContent() { 3002 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3003 mContentView.measure( 3004 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3005 View.MeasureSpec.AT_MOST), 3006 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3007 View.MeasureSpec.AT_MOST)); 3008 } 3009 3010 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3011 * positioned according to viewportToContentHorizontalOffset. 3012 * 3013 * This method assumes that mContentView has properly been measured from its content. */ 3014 private void computeLocalPosition() { 3015 measureContent(); 3016 final int width = mContentView.getMeasuredWidth(); 3017 final int offset = getTextOffset(); 3018 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3019 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3020 3021 final int line = mTextView.getLayout().getLineForOffset(offset); 3022 mPositionY = getVerticalLocalPosition(line); 3023 mPositionY += mTextView.viewportToContentVerticalOffset(); 3024 } 3025 3026 private void updatePosition(int parentPositionX, int parentPositionY) { 3027 int positionX = parentPositionX + mPositionX; 3028 int positionY = parentPositionY + mPositionY; 3029 3030 positionY = clipVertically(positionY); 3031 3032 // Horizontal clipping 3033 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3034 final int width = mContentView.getMeasuredWidth(); 3035 positionX = Math.min( 3036 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3037 positionX = Math.max(-mClippingLimitLeft, positionX); 3038 3039 if (isShowing()) { 3040 mPopupWindow.update(positionX, positionY, -1, -1); 3041 } else { 3042 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3043 positionX, positionY); 3044 } 3045 } 3046 3047 public void hide() { 3048 if (!isShowing()) { 3049 return; 3050 } 3051 mPopupWindow.dismiss(); 3052 getPositionListener().removeSubscriber(this); 3053 } 3054 3055 @Override 3056 public void updatePosition(int parentPositionX, int parentPositionY, 3057 boolean parentPositionChanged, boolean parentScrolled) { 3058 // Either parentPositionChanged or parentScrolled is true, check if still visible 3059 if (isShowing() && isOffsetVisible(getTextOffset())) { 3060 if (parentScrolled) computeLocalPosition(); 3061 updatePosition(parentPositionX, parentPositionY); 3062 } else { 3063 hide(); 3064 } 3065 } 3066 3067 public boolean isShowing() { 3068 return mPopupWindow.isShowing(); 3069 } 3070 } 3071 3072 private static final class SuggestionInfo { 3073 // Range of actual suggestion within mText 3074 int mSuggestionStart, mSuggestionEnd; 3075 3076 // The SuggestionSpan that this TextView represents 3077 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3078 3079 // The index of this suggestion inside suggestionSpan 3080 int mSuggestionIndex; 3081 3082 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3083 3084 void clear() { 3085 mSuggestionSpanInfo.clear(); 3086 mText.clear(); 3087 } 3088 3089 // Utility method to set attributes about a SuggestionSpan. 3090 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3091 mSuggestionSpanInfo.mSuggestionSpan = span; 3092 mSuggestionSpanInfo.mSpanStart = spanStart; 3093 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3094 } 3095 } 3096 3097 private static final class SuggestionSpanInfo { 3098 // The SuggestionSpan; 3099 @Nullable 3100 SuggestionSpan mSuggestionSpan; 3101 3102 // The SuggestionSpan start position 3103 int mSpanStart; 3104 3105 // The SuggestionSpan end position 3106 int mSpanEnd; 3107 3108 void clear() { 3109 mSuggestionSpan = null; 3110 } 3111 } 3112 3113 private class SuggestionHelper { 3114 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3115 new SuggestionSpanComparator(); 3116 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3117 new HashMap<SuggestionSpan, Integer>(); 3118 3119 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3120 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3121 final int flag1 = span1.getFlags(); 3122 final int flag2 = span2.getFlags(); 3123 if (flag1 != flag2) { 3124 // The order here should match what is used in updateDrawState 3125 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3126 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3127 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3128 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3129 if (easy1 && !misspelled1) return -1; 3130 if (easy2 && !misspelled2) return 1; 3131 if (misspelled1) return -1; 3132 if (misspelled2) return 1; 3133 } 3134 3135 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3136 } 3137 } 3138 3139 /** 3140 * Returns the suggestion spans that cover the current cursor position. The suggestion 3141 * spans are sorted according to the length of text that they are attached to. 3142 */ 3143 private SuggestionSpan[] getSortedSuggestionSpans() { 3144 int pos = mTextView.getSelectionStart(); 3145 Spannable spannable = (Spannable) mTextView.getText(); 3146 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3147 3148 mSpansLengths.clear(); 3149 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3150 int start = spannable.getSpanStart(suggestionSpan); 3151 int end = spannable.getSpanEnd(suggestionSpan); 3152 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3153 } 3154 3155 // The suggestions are sorted according to their types (easy correction first, then 3156 // misspelled) and to the length of the text that they cover (shorter first). 3157 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3158 mSpansLengths.clear(); 3159 3160 return suggestionSpans; 3161 } 3162 3163 /** 3164 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3165 * position. 3166 * 3167 * @param suggestionInfos SuggestionInfo array the results will be set. 3168 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3169 * @return the number of suggestions actually fetched. 3170 */ 3171 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3172 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3173 final Spannable spannable = (Spannable) mTextView.getText(); 3174 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3175 final int nbSpans = suggestionSpans.length; 3176 if (nbSpans == 0) return 0; 3177 3178 int numberOfSuggestions = 0; 3179 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3180 final int spanStart = spannable.getSpanStart(suggestionSpan); 3181 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3182 3183 if (misspelledSpanInfo != null 3184 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3185 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3186 misspelledSpanInfo.mSpanStart = spanStart; 3187 misspelledSpanInfo.mSpanEnd = spanEnd; 3188 } 3189 3190 final String[] suggestions = suggestionSpan.getSuggestions(); 3191 final int nbSuggestions = suggestions.length; 3192 suggestionLoop: 3193 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3194 final String suggestion = suggestions[suggestionIndex]; 3195 for (int i = 0; i < numberOfSuggestions; i++) { 3196 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3197 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3198 final int otherSpanStart = 3199 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3200 final int otherSpanEnd = 3201 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3202 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3203 continue suggestionLoop; 3204 } 3205 } 3206 } 3207 3208 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3209 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3210 suggestionInfo.mSuggestionIndex = suggestionIndex; 3211 suggestionInfo.mSuggestionStart = 0; 3212 suggestionInfo.mSuggestionEnd = suggestion.length(); 3213 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3214 numberOfSuggestions++; 3215 if (numberOfSuggestions >= suggestionInfos.length) { 3216 return numberOfSuggestions; 3217 } 3218 } 3219 } 3220 return numberOfSuggestions; 3221 } 3222 } 3223 3224 @VisibleForTesting 3225 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3226 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3227 3228 // Key of intent extras for inserting new word into user dictionary. 3229 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3230 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3231 3232 private SuggestionInfo[] mSuggestionInfos; 3233 private int mNumberOfSuggestions; 3234 private boolean mCursorWasVisibleBeforeSuggestions; 3235 private boolean mIsShowingUp = false; 3236 private SuggestionAdapter mSuggestionsAdapter; 3237 private final TextAppearanceSpan mHighlightSpan = new TextAppearanceSpan( 3238 mTextView.getContext(), mTextView.mTextEditSuggestionHighlightStyle); 3239 private TextView mAddToDictionaryButton; 3240 private TextView mDeleteButton; 3241 private ListView mSuggestionListView; 3242 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3243 private int mContainerMarginWidth; 3244 private int mContainerMarginTop; 3245 3246 private class CustomPopupWindow extends PopupWindow { 3247 @Override 3248 public void dismiss() { 3249 if (!isShowing()) { 3250 return; 3251 } 3252 super.dismiss(); 3253 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3254 3255 // Safe cast since show() checks that mTextView.getText() is an Editable 3256 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3257 3258 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3259 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3260 getInsertionController().show(); 3261 } 3262 } 3263 } 3264 3265 public SuggestionsPopupWindow() { 3266 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3267 } 3268 3269 @Override 3270 protected void createPopupWindow() { 3271 mPopupWindow = new CustomPopupWindow(); 3272 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3273 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3274 mPopupWindow.setFocusable(true); 3275 mPopupWindow.setClippingEnabled(false); 3276 } 3277 3278 @Override 3279 protected void initContentView() { 3280 final LayoutInflater inflater = (LayoutInflater) mTextView.getContext(). 3281 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 3282 final ViewGroup relativeLayout = (ViewGroup) inflater.inflate( 3283 mTextView.mTextEditSuggestionContainerLayout, null); 3284 3285 final LinearLayout suggestionWindowContainer = 3286 (LinearLayout) relativeLayout.findViewById( 3287 com.android.internal.R.id.suggestionWindowContainer); 3288 ViewGroup.MarginLayoutParams lp = 3289 (ViewGroup.MarginLayoutParams) suggestionWindowContainer.getLayoutParams(); 3290 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3291 mContainerMarginTop = lp.topMargin; 3292 mClippingLimitLeft = lp.leftMargin; 3293 mClippingLimitRight = lp.rightMargin; 3294 3295 mSuggestionListView = (ListView) relativeLayout.findViewById( 3296 com.android.internal.R.id.suggestionContainer); 3297 3298 mSuggestionsAdapter = new SuggestionAdapter(); 3299 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3300 mSuggestionListView.setOnItemClickListener(this); 3301 3302 // Inflate the suggestion items once and for all. 3303 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3304 for (int i = 0; i < mSuggestionInfos.length; i++) { 3305 mSuggestionInfos[i] = new SuggestionInfo(); 3306 } 3307 3308 mContentView = relativeLayout; 3309 3310 mAddToDictionaryButton = (TextView) relativeLayout.findViewById( 3311 com.android.internal.R.id.addToDictionaryButton); 3312 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3313 public void onClick(View v) { 3314 final SuggestionSpan misspelledSpan = 3315 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3316 if (misspelledSpan == null) { 3317 // Span has been removed. 3318 return; 3319 } 3320 final Editable editable = (Editable) mTextView.getText(); 3321 final int spanStart = editable.getSpanStart(misspelledSpan); 3322 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3323 if (spanStart < 0 || spanEnd <= spanStart) { 3324 return; 3325 } 3326 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3327 3328 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3329 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3330 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3331 mTextView.getTextServicesLocale().toString()); 3332 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3333 mTextView.getContext().startActivity(intent); 3334 // There is no way to know if the word was indeed added. Re-check. 3335 // TODO The ExtractEditText should remove the span in the original text instead 3336 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3337 Selection.setSelection(editable, spanEnd); 3338 updateSpellCheckSpans(spanStart, spanEnd, false); 3339 hideWithCleanUp(); 3340 } 3341 }); 3342 3343 mDeleteButton = (TextView) relativeLayout.findViewById( 3344 com.android.internal.R.id.deleteButton); 3345 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3346 public void onClick(View v) { 3347 final Editable editable = (Editable) mTextView.getText(); 3348 3349 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3350 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3351 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3352 // Do not leave two adjacent spaces after deletion, or one at beginning of 3353 // text 3354 if (spanUnionEnd < editable.length() && 3355 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 3356 (spanUnionStart == 0 || 3357 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 3358 spanUnionEnd = spanUnionEnd + 1; 3359 } 3360 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3361 } 3362 hideWithCleanUp(); 3363 } 3364 }); 3365 3366 } 3367 3368 public boolean isShowingUp() { 3369 return mIsShowingUp; 3370 } 3371 3372 public void onParentLostFocus() { 3373 mIsShowingUp = false; 3374 } 3375 3376 private class SuggestionAdapter extends BaseAdapter { 3377 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 3378 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 3379 3380 @Override 3381 public int getCount() { 3382 return mNumberOfSuggestions; 3383 } 3384 3385 @Override 3386 public Object getItem(int position) { 3387 return mSuggestionInfos[position]; 3388 } 3389 3390 @Override 3391 public long getItemId(int position) { 3392 return position; 3393 } 3394 3395 @Override 3396 public View getView(int position, View convertView, ViewGroup parent) { 3397 TextView textView = (TextView) convertView; 3398 3399 if (textView == null) { 3400 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3401 parent, false); 3402 } 3403 3404 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3405 textView.setText(suggestionInfo.mText); 3406 return textView; 3407 } 3408 } 3409 3410 @VisibleForTesting 3411 public ViewGroup getContentViewForTesting() { 3412 return mContentView; 3413 } 3414 3415 @Override 3416 public void show() { 3417 if (!(mTextView.getText() instanceof Editable)) return; 3418 if (extractedTextModeWillBeStarted()) { 3419 return; 3420 } 3421 3422 if (updateSuggestions()) { 3423 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3424 mTextView.setCursorVisible(false); 3425 mIsShowingUp = true; 3426 super.show(); 3427 } 3428 } 3429 3430 @Override 3431 protected void measureContent() { 3432 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3433 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3434 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3435 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3436 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3437 3438 int width = 0; 3439 View view = null; 3440 for (int i = 0; i < mNumberOfSuggestions; i++) { 3441 view = mSuggestionsAdapter.getView(i, view, mContentView); 3442 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3443 view.measure(horizontalMeasure, verticalMeasure); 3444 width = Math.max(width, view.getMeasuredWidth()); 3445 } 3446 3447 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3448 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3449 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3450 } 3451 3452 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3453 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3454 3455 width += mContainerMarginWidth; 3456 3457 // Enforce the width based on actual text widths 3458 mContentView.measure( 3459 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3460 verticalMeasure); 3461 3462 Drawable popupBackground = mPopupWindow.getBackground(); 3463 if (popupBackground != null) { 3464 if (mTempRect == null) mTempRect = new Rect(); 3465 popupBackground.getPadding(mTempRect); 3466 width += mTempRect.left + mTempRect.right; 3467 } 3468 mSuggestionListView.getLayoutParams().width = width; 3469 mPopupWindow.setWidth(width); 3470 } 3471 3472 @Override 3473 protected int getTextOffset() { 3474 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3475 } 3476 3477 @Override 3478 protected int getVerticalLocalPosition(int line) { 3479 return mTextView.getLayout().getLineBottom(line) - mContainerMarginTop; 3480 } 3481 3482 @Override 3483 protected int clipVertically(int positionY) { 3484 final int height = mContentView.getMeasuredHeight(); 3485 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3486 return Math.min(positionY, displayMetrics.heightPixels - height); 3487 } 3488 3489 private void hideWithCleanUp() { 3490 for (final SuggestionInfo info : mSuggestionInfos) { 3491 info.clear(); 3492 } 3493 mMisspelledSpanInfo.clear(); 3494 hide(); 3495 } 3496 3497 private boolean updateSuggestions() { 3498 Spannable spannable = (Spannable) mTextView.getText(); 3499 mNumberOfSuggestions = 3500 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3501 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3502 return false; 3503 } 3504 3505 int spanUnionStart = mTextView.getText().length(); 3506 int spanUnionEnd = 0; 3507 3508 for (int i = 0; i < mNumberOfSuggestions; i++) { 3509 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3510 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3511 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3512 } 3513 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3514 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3515 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3516 } 3517 3518 for (int i = 0; i < mNumberOfSuggestions; i++) { 3519 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3520 } 3521 3522 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3523 int addToDictionaryButtonVisibility = View.GONE; 3524 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3525 if (mMisspelledSpanInfo.mSpanStart >= 0 3526 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3527 addToDictionaryButtonVisibility = View.VISIBLE; 3528 } 3529 } 3530 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3531 3532 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3533 final int underlineColor; 3534 if (mNumberOfSuggestions != 0) { 3535 underlineColor = 3536 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3537 } else { 3538 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3539 } 3540 3541 if (underlineColor == 0) { 3542 // Fallback on the default highlight color when the first span does not provide one 3543 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3544 } else { 3545 final float BACKGROUND_TRANSPARENCY = 0.4f; 3546 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3547 mSuggestionRangeSpan.setBackgroundColor( 3548 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3549 } 3550 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3551 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3552 3553 mSuggestionsAdapter.notifyDataSetChanged(); 3554 return true; 3555 } 3556 3557 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3558 int unionEnd) { 3559 final Spannable text = (Spannable) mTextView.getText(); 3560 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3561 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3562 3563 // Adjust the start/end of the suggestion span 3564 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3565 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3566 + suggestionInfo.mText.length(); 3567 3568 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3569 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3570 3571 // Add the text before and after the span. 3572 final String textAsString = text.toString(); 3573 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3574 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3575 } 3576 3577 @Override 3578 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3579 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3580 replaceWithSuggestion(suggestionInfo); 3581 hideWithCleanUp(); 3582 } 3583 } 3584 3585 /** 3586 * An ActionMode Callback class that is used to provide actions while in text insertion or 3587 * selection mode. 3588 * 3589 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3590 * actions, depending on which of these this TextView supports and the current selection. 3591 */ 3592 private class TextActionModeCallback extends ActionMode.Callback2 { 3593 private final Path mSelectionPath = new Path(); 3594 private final RectF mSelectionBounds = new RectF(); 3595 private final boolean mHasSelection; 3596 3597 private int mHandleHeight; 3598 3599 public TextActionModeCallback(boolean hasSelection) { 3600 mHasSelection = hasSelection; 3601 if (mHasSelection) { 3602 SelectionModifierCursorController selectionController = getSelectionController(); 3603 if (selectionController.mStartHandle == null) { 3604 // As these are for initializing selectionController, hide() must be called. 3605 selectionController.initDrawables(); 3606 selectionController.initHandles(); 3607 selectionController.hide(); 3608 } 3609 mHandleHeight = Math.max( 3610 mSelectHandleLeft.getMinimumHeight(), 3611 mSelectHandleRight.getMinimumHeight()); 3612 } else { 3613 InsertionPointCursorController insertionController = getInsertionController(); 3614 if (insertionController != null) { 3615 insertionController.getHandle(); 3616 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3617 } 3618 } 3619 } 3620 3621 @Override 3622 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3623 mode.setTitle(null); 3624 mode.setSubtitle(null); 3625 mode.setTitleOptionalHint(true); 3626 populateMenuWithItems(menu); 3627 3628 Callback customCallback = getCustomCallback(); 3629 if (customCallback != null) { 3630 if (!customCallback.onCreateActionMode(mode, menu)) { 3631 // The custom mode can choose to cancel the action mode, dismiss selection. 3632 Selection.setSelection((Spannable) mTextView.getText(), 3633 mTextView.getSelectionEnd()); 3634 return false; 3635 } 3636 } 3637 3638 if (mTextView.canProcessText()) { 3639 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3640 } 3641 3642 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3643 if (mHasSelection && !mTextView.hasTransientState()) { 3644 mTextView.setHasTransientState(true); 3645 } 3646 return true; 3647 } else { 3648 return false; 3649 } 3650 } 3651 3652 private Callback getCustomCallback() { 3653 return mHasSelection 3654 ? mCustomSelectionActionModeCallback 3655 : mCustomInsertionActionModeCallback; 3656 } 3657 3658 private void populateMenuWithItems(Menu menu) { 3659 if (mTextView.canCut()) { 3660 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3661 com.android.internal.R.string.cut). 3662 setAlphabeticShortcut('x'). 3663 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3664 } 3665 3666 if (mTextView.canCopy()) { 3667 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3668 com.android.internal.R.string.copy). 3669 setAlphabeticShortcut('c'). 3670 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3671 } 3672 3673 if (mTextView.canPaste()) { 3674 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3675 com.android.internal.R.string.paste). 3676 setAlphabeticShortcut('v'). 3677 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3678 } 3679 3680 if (mTextView.canShare()) { 3681 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3682 com.android.internal.R.string.share). 3683 setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3684 } 3685 3686 updateSelectAllItem(menu); 3687 updateReplaceItem(menu); 3688 } 3689 3690 @Override 3691 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3692 updateSelectAllItem(menu); 3693 updateReplaceItem(menu); 3694 3695 Callback customCallback = getCustomCallback(); 3696 if (customCallback != null) { 3697 return customCallback.onPrepareActionMode(mode, menu); 3698 } 3699 return true; 3700 } 3701 3702 private void updateSelectAllItem(Menu menu) { 3703 boolean canSelectAll = mTextView.canSelectAllText(); 3704 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3705 if (canSelectAll && !selectAllItemExists) { 3706 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3707 com.android.internal.R.string.selectAll) 3708 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3709 } else if (!canSelectAll && selectAllItemExists) { 3710 menu.removeItem(TextView.ID_SELECT_ALL); 3711 } 3712 } 3713 3714 private void updateReplaceItem(Menu menu) { 3715 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3716 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3717 if (canReplace && !replaceItemExists) { 3718 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3719 com.android.internal.R.string.replace) 3720 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3721 } else if (!canReplace && replaceItemExists) { 3722 menu.removeItem(TextView.ID_REPLACE); 3723 } 3724 } 3725 3726 @Override 3727 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3728 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3729 return true; 3730 } 3731 Callback customCallback = getCustomCallback(); 3732 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3733 return true; 3734 } 3735 return mTextView.onTextContextMenuItem(item.getItemId()); 3736 } 3737 3738 @Override 3739 public void onDestroyActionMode(ActionMode mode) { 3740 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 3741 mTextActionMode = null; 3742 Callback customCallback = getCustomCallback(); 3743 if (customCallback != null) { 3744 customCallback.onDestroyActionMode(mode); 3745 } 3746 3747 if (!mPreserveSelection) { 3748 /* 3749 * Leave current selection when we tentatively destroy action mode for the 3750 * selection. If we're detaching from a window, we'll bring back the selection 3751 * mode when (if) we get reattached. 3752 */ 3753 Selection.setSelection((Spannable) mTextView.getText(), 3754 mTextView.getSelectionEnd()); 3755 } 3756 3757 if (mSelectionModifierCursorController != null) { 3758 mSelectionModifierCursorController.hide(); 3759 } 3760 } 3761 3762 @Override 3763 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3764 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3765 super.onGetContentRect(mode, view, outRect); 3766 return; 3767 } 3768 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3769 // We have a selection. 3770 mSelectionPath.reset(); 3771 mTextView.getLayout().getSelectionPath( 3772 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3773 mSelectionPath.computeBounds(mSelectionBounds, true); 3774 mSelectionBounds.bottom += mHandleHeight; 3775 } else if (mCursorCount == 2) { 3776 // We have a split cursor. In this case, we take the rectangle that includes both 3777 // parts of the cursor to ensure we don't obscure either of them. 3778 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3779 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3780 mSelectionBounds.set( 3781 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3782 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3783 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3784 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3785 + mHandleHeight); 3786 } else { 3787 // We have a single cursor. 3788 Layout layout = mTextView.getLayout(); 3789 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 3790 float primaryHorizontal = clampHorizontalPosition(null, 3791 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 3792 mSelectionBounds.set( 3793 primaryHorizontal, 3794 layout.getLineTop(line), 3795 primaryHorizontal, 3796 layout.getLineTop(line + 1) + mHandleHeight); 3797 } 3798 // Take TextView's padding and scroll into account. 3799 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3800 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3801 outRect.set( 3802 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3803 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3804 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3805 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3806 } 3807 } 3808 3809 /** 3810 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3811 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3812 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3813 */ 3814 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3815 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3816 final int[] mTmpIntOffset = new int[2]; 3817 final Matrix mViewToScreenMatrix = new Matrix(); 3818 3819 @Override 3820 public void updatePosition(int parentPositionX, int parentPositionY, 3821 boolean parentPositionChanged, boolean parentScrolled) { 3822 final InputMethodState ims = mInputMethodState; 3823 if (ims == null || ims.mBatchEditNesting > 0) { 3824 return; 3825 } 3826 final InputMethodManager imm = InputMethodManager.peekInstance(); 3827 if (null == imm) { 3828 return; 3829 } 3830 if (!imm.isActive(mTextView)) { 3831 return; 3832 } 3833 // Skip if the IME has not requested the cursor/anchor position. 3834 if (!imm.isCursorAnchorInfoEnabled()) { 3835 return; 3836 } 3837 Layout layout = mTextView.getLayout(); 3838 if (layout == null) { 3839 return; 3840 } 3841 3842 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3843 builder.reset(); 3844 3845 final int selectionStart = mTextView.getSelectionStart(); 3846 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3847 3848 // Construct transformation matrix from view local coordinates to screen coordinates. 3849 mViewToScreenMatrix.set(mTextView.getMatrix()); 3850 mTextView.getLocationOnScreen(mTmpIntOffset); 3851 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3852 builder.setMatrix(mViewToScreenMatrix); 3853 3854 final float viewportToContentHorizontalOffset = 3855 mTextView.viewportToContentHorizontalOffset(); 3856 final float viewportToContentVerticalOffset = 3857 mTextView.viewportToContentVerticalOffset(); 3858 3859 final CharSequence text = mTextView.getText(); 3860 if (text instanceof Spannable) { 3861 final Spannable sp = (Spannable) text; 3862 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3863 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3864 if (composingTextEnd < composingTextStart) { 3865 final int temp = composingTextEnd; 3866 composingTextEnd = composingTextStart; 3867 composingTextStart = temp; 3868 } 3869 final boolean hasComposingText = 3870 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3871 if (hasComposingText) { 3872 final CharSequence composingText = text.subSequence(composingTextStart, 3873 composingTextEnd); 3874 builder.setComposingText(composingTextStart, composingText); 3875 3876 final int minLine = layout.getLineForOffset(composingTextStart); 3877 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3878 for (int line = minLine; line <= maxLine; ++line) { 3879 final int lineStart = layout.getLineStart(line); 3880 final int lineEnd = layout.getLineEnd(line); 3881 final int offsetStart = Math.max(lineStart, composingTextStart); 3882 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3883 final boolean ltrLine = 3884 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3885 final float[] widths = new float[offsetEnd - offsetStart]; 3886 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3887 final float top = layout.getLineTop(line); 3888 final float bottom = layout.getLineBottom(line); 3889 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3890 final float charWidth = widths[offset - offsetStart]; 3891 final boolean isRtl = layout.isRtlCharAt(offset); 3892 final float primary = layout.getPrimaryHorizontal(offset); 3893 final float secondary = layout.getSecondaryHorizontal(offset); 3894 // TODO: This doesn't work perfectly for text with custom styles and 3895 // TAB chars. 3896 final float left; 3897 final float right; 3898 if (ltrLine) { 3899 if (isRtl) { 3900 left = secondary - charWidth; 3901 right = secondary; 3902 } else { 3903 left = primary; 3904 right = primary + charWidth; 3905 } 3906 } else { 3907 if (!isRtl) { 3908 left = secondary; 3909 right = secondary + charWidth; 3910 } else { 3911 left = primary - charWidth; 3912 right = primary; 3913 } 3914 } 3915 // TODO: Check top-right and bottom-left as well. 3916 final float localLeft = left + viewportToContentHorizontalOffset; 3917 final float localRight = right + viewportToContentHorizontalOffset; 3918 final float localTop = top + viewportToContentVerticalOffset; 3919 final float localBottom = bottom + viewportToContentVerticalOffset; 3920 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3921 final boolean isBottomRightVisible = 3922 isPositionVisible(localRight, localBottom); 3923 int characterBoundsFlags = 0; 3924 if (isTopLeftVisible || isBottomRightVisible) { 3925 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3926 } 3927 if (!isTopLeftVisible || !isBottomRightVisible) { 3928 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3929 } 3930 if (isRtl) { 3931 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3932 } 3933 // Here offset is the index in Java chars. 3934 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3935 localBottom, characterBoundsFlags); 3936 } 3937 } 3938 } 3939 } 3940 3941 // Treat selectionStart as the insertion point. 3942 if (0 <= selectionStart) { 3943 final int offset = selectionStart; 3944 final int line = layout.getLineForOffset(offset); 3945 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3946 + viewportToContentHorizontalOffset; 3947 final float insertionMarkerTop = layout.getLineTop(line) 3948 + viewportToContentVerticalOffset; 3949 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3950 + viewportToContentVerticalOffset; 3951 final float insertionMarkerBottom = layout.getLineBottom(line) 3952 + viewportToContentVerticalOffset; 3953 final boolean isTopVisible = 3954 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3955 final boolean isBottomVisible = 3956 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3957 int insertionMarkerFlags = 0; 3958 if (isTopVisible || isBottomVisible) { 3959 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3960 } 3961 if (!isTopVisible || !isBottomVisible) { 3962 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3963 } 3964 if (layout.isRtlCharAt(offset)) { 3965 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3966 } 3967 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3968 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3969 } 3970 3971 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3972 } 3973 } 3974 3975 @VisibleForTesting 3976 public abstract class HandleView extends View implements TextViewPositionListener { 3977 protected Drawable mDrawable; 3978 protected Drawable mDrawableLtr; 3979 protected Drawable mDrawableRtl; 3980 private final PopupWindow mContainer; 3981 // Position with respect to the parent TextView 3982 private int mPositionX, mPositionY; 3983 private boolean mIsDragging; 3984 // Offset from touch position to mPosition 3985 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3986 protected int mHotspotX; 3987 protected int mHorizontalGravity; 3988 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3989 private float mTouchOffsetY; 3990 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3991 private float mIdealVerticalOffset; 3992 // Parent's (TextView) previous position in window 3993 private int mLastParentX, mLastParentY; 3994 // Previous text character offset 3995 protected int mPreviousOffset = -1; 3996 // Previous text character offset 3997 private boolean mPositionHasChanged = true; 3998 // Minimum touch target size for handles 3999 private int mMinSize; 4000 // Indicates the line of text that the handle is on. 4001 protected int mPrevLine = UNSET_LINE; 4002 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4003 // when selecting text when the handles jump to the end / start of words which may be on 4004 // a different line. 4005 protected int mPreviousLineTouched = UNSET_LINE; 4006 4007 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4008 super(mTextView.getContext()); 4009 setId(id); 4010 mContainer = new PopupWindow(mTextView.getContext(), null, 4011 com.android.internal.R.attr.textSelectHandleWindowStyle); 4012 mContainer.setSplitTouchEnabled(true); 4013 mContainer.setClippingEnabled(false); 4014 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4015 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4016 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4017 mContainer.setContentView(this); 4018 4019 mDrawableLtr = drawableLtr; 4020 mDrawableRtl = drawableRtl; 4021 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4022 com.android.internal.R.dimen.text_handle_min_size); 4023 4024 updateDrawable(); 4025 4026 final int handleHeight = getPreferredHeight(); 4027 mTouchOffsetY = -0.3f * handleHeight; 4028 mIdealVerticalOffset = 0.7f * handleHeight; 4029 } 4030 4031 public float getIdealVerticalOffset() { 4032 return mIdealVerticalOffset; 4033 } 4034 4035 protected void updateDrawable() { 4036 if (mIsDragging) { 4037 // Don't update drawable during dragging. 4038 return; 4039 } 4040 final Layout layout = mTextView.getLayout(); 4041 if (layout == null) { 4042 return; 4043 } 4044 final int offset = getCurrentCursorOffset(); 4045 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4046 final Drawable oldDrawable = mDrawable; 4047 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4048 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4049 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4050 if (oldDrawable != mDrawable && isShowing()) { 4051 // Update popup window position. 4052 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX - 4053 getHorizontalOffset() + getCursorOffset(); 4054 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4055 mPositionHasChanged = true; 4056 updatePosition(mLastParentX, mLastParentY, false, false); 4057 postInvalidate(); 4058 } 4059 } 4060 4061 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4062 protected abstract int getHorizontalGravity(boolean isRtlRun); 4063 4064 // Touch-up filter: number of previous positions remembered 4065 private static final int HISTORY_SIZE = 5; 4066 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4067 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4068 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4069 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4070 private int mPreviousOffsetIndex = 0; 4071 private int mNumberPreviousOffsets = 0; 4072 4073 private void startTouchUpFilter(int offset) { 4074 mNumberPreviousOffsets = 0; 4075 addPositionToTouchUpFilter(offset); 4076 } 4077 4078 private void addPositionToTouchUpFilter(int offset) { 4079 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4080 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4081 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4082 mNumberPreviousOffsets++; 4083 } 4084 4085 private void filterOnTouchUp() { 4086 final long now = SystemClock.uptimeMillis(); 4087 int i = 0; 4088 int index = mPreviousOffsetIndex; 4089 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4090 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4091 i++; 4092 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4093 } 4094 4095 if (i > 0 && i < iMax && 4096 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4097 positionAtCursorOffset(mPreviousOffsets[index], false); 4098 } 4099 } 4100 4101 public boolean offsetHasBeenChanged() { 4102 return mNumberPreviousOffsets > 1; 4103 } 4104 4105 @Override 4106 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4107 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4108 } 4109 4110 private int getPreferredWidth() { 4111 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4112 } 4113 4114 private int getPreferredHeight() { 4115 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4116 } 4117 4118 public void show() { 4119 if (isShowing()) return; 4120 4121 getPositionListener().addSubscriber(this, true /* local position may change */); 4122 4123 // Make sure the offset is always considered new, even when focusing at same position 4124 mPreviousOffset = -1; 4125 positionAtCursorOffset(getCurrentCursorOffset(), false); 4126 } 4127 4128 protected void dismiss() { 4129 mIsDragging = false; 4130 mContainer.dismiss(); 4131 onDetached(); 4132 } 4133 4134 public void hide() { 4135 dismiss(); 4136 4137 getPositionListener().removeSubscriber(this); 4138 } 4139 4140 public boolean isShowing() { 4141 return mContainer.isShowing(); 4142 } 4143 4144 private boolean isVisible() { 4145 // Always show a dragging handle. 4146 if (mIsDragging) { 4147 return true; 4148 } 4149 4150 if (mTextView.isInBatchEditMode()) { 4151 return false; 4152 } 4153 4154 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4155 } 4156 4157 public abstract int getCurrentCursorOffset(); 4158 4159 protected abstract void updateSelection(int offset); 4160 4161 public abstract void updatePosition(float x, float y); 4162 4163 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4164 return layout.isRtlCharAt(offset); 4165 } 4166 4167 @VisibleForTesting 4168 public float getHorizontal(@NonNull Layout layout, int offset) { 4169 return layout.getPrimaryHorizontal(offset); 4170 } 4171 4172 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4173 return mTextView.getOffsetAtCoordinate(line, x); 4174 } 4175 4176 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4177 // A HandleView relies on the layout, which may be nulled by external methods 4178 Layout layout = mTextView.getLayout(); 4179 if (layout == null) { 4180 // Will update controllers' state, hiding them and stopping selection mode if needed 4181 prepareCursorControllers(); 4182 return; 4183 } 4184 layout = mTextView.getLayout(); 4185 4186 boolean offsetChanged = offset != mPreviousOffset; 4187 if (offsetChanged || parentScrolled) { 4188 if (offsetChanged) { 4189 updateSelection(offset); 4190 addPositionToTouchUpFilter(offset); 4191 } 4192 final int line = layout.getLineForOffset(offset); 4193 mPrevLine = line; 4194 4195 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX - 4196 getHorizontalOffset() + getCursorOffset(); 4197 mPositionY = layout.getLineBottom(line); 4198 4199 // Take TextView's padding and scroll into account. 4200 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4201 mPositionY += mTextView.viewportToContentVerticalOffset(); 4202 4203 mPreviousOffset = offset; 4204 mPositionHasChanged = true; 4205 } 4206 } 4207 4208 /** 4209 * Return the clamped horizontal position for the first cursor. 4210 * 4211 * @param layout Text layout. 4212 * @param offset Character offset for the cursor. 4213 * @return The clamped horizontal position for the cursor. 4214 */ 4215 int getCursorHorizontalPosition(Layout layout, int offset) { 4216 return (int) (getHorizontal(layout, offset) - 0.5f); 4217 } 4218 4219 public void updatePosition(int parentPositionX, int parentPositionY, 4220 boolean parentPositionChanged, boolean parentScrolled) { 4221 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 4222 if (parentPositionChanged || mPositionHasChanged) { 4223 if (mIsDragging) { 4224 // Update touchToWindow offset in case of parent scrolling while dragging 4225 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4226 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4227 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4228 mLastParentX = parentPositionX; 4229 mLastParentY = parentPositionY; 4230 } 4231 4232 onHandleMoved(); 4233 } 4234 4235 if (isVisible()) { 4236 // Transform to the window coordinates to follow the view tranformation. 4237 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4238 mTextView.transformFromViewToWindowSpace(pts); 4239 pts[0] -= mHotspotX + getHorizontalOffset(); 4240 4241 if (isShowing()) { 4242 mContainer.update(pts[0], pts[1], -1, -1); 4243 } else { 4244 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4245 } 4246 } else { 4247 if (isShowing()) { 4248 dismiss(); 4249 } 4250 } 4251 4252 mPositionHasChanged = false; 4253 } 4254 } 4255 4256 @Override 4257 protected void onDraw(Canvas c) { 4258 final int drawWidth = mDrawable.getIntrinsicWidth(); 4259 final int left = getHorizontalOffset(); 4260 4261 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4262 mDrawable.draw(c); 4263 } 4264 4265 private int getHorizontalOffset() { 4266 final int width = getPreferredWidth(); 4267 final int drawWidth = mDrawable.getIntrinsicWidth(); 4268 final int left; 4269 switch (mHorizontalGravity) { 4270 case Gravity.LEFT: 4271 left = 0; 4272 break; 4273 default: 4274 case Gravity.CENTER: 4275 left = (width - drawWidth) / 2; 4276 break; 4277 case Gravity.RIGHT: 4278 left = width - drawWidth; 4279 break; 4280 } 4281 return left; 4282 } 4283 4284 protected int getCursorOffset() { 4285 return 0; 4286 } 4287 4288 @Override 4289 public boolean onTouchEvent(MotionEvent ev) { 4290 updateFloatingToolbarVisibility(ev); 4291 4292 switch (ev.getActionMasked()) { 4293 case MotionEvent.ACTION_DOWN: { 4294 startTouchUpFilter(getCurrentCursorOffset()); 4295 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 4296 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 4297 4298 final PositionListener positionListener = getPositionListener(); 4299 mLastParentX = positionListener.getPositionX(); 4300 mLastParentY = positionListener.getPositionY(); 4301 mIsDragging = true; 4302 mPreviousLineTouched = UNSET_LINE; 4303 break; 4304 } 4305 4306 case MotionEvent.ACTION_MOVE: { 4307 final float rawX = ev.getRawX(); 4308 final float rawY = ev.getRawY(); 4309 4310 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4311 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4312 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 4313 float newVerticalOffset; 4314 if (previousVerticalOffset < mIdealVerticalOffset) { 4315 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4316 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4317 } else { 4318 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4319 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4320 } 4321 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4322 4323 final float newPosX = 4324 rawX - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4325 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 4326 4327 updatePosition(newPosX, newPosY); 4328 break; 4329 } 4330 4331 case MotionEvent.ACTION_UP: 4332 filterOnTouchUp(); 4333 mIsDragging = false; 4334 updateDrawable(); 4335 break; 4336 4337 case MotionEvent.ACTION_CANCEL: 4338 mIsDragging = false; 4339 updateDrawable(); 4340 break; 4341 } 4342 return true; 4343 } 4344 4345 public boolean isDragging() { 4346 return mIsDragging; 4347 } 4348 4349 void onHandleMoved() {} 4350 4351 public void onDetached() {} 4352 } 4353 4354 private class InsertionHandleView extends HandleView { 4355 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4356 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4357 4358 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4359 private float mDownPositionX, mDownPositionY; 4360 private Runnable mHider; 4361 4362 public InsertionHandleView(Drawable drawable) { 4363 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4364 } 4365 4366 @Override 4367 public void show() { 4368 super.show(); 4369 4370 final long durationSinceCutOrCopy = 4371 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4372 4373 // Cancel the single tap delayed runnable. 4374 if (mInsertionActionModeRunnable != null 4375 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4376 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4377 || isCursorInsideEasyCorrectionSpan())) { 4378 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4379 } 4380 4381 // Prepare and schedule the single tap runnable to run exactly after the double tap 4382 // timeout has passed. 4383 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4384 && !isCursorInsideEasyCorrectionSpan() 4385 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4386 if (mTextActionMode == null) { 4387 if (mInsertionActionModeRunnable == null) { 4388 mInsertionActionModeRunnable = new Runnable() { 4389 @Override 4390 public void run() { 4391 startInsertionActionMode(); 4392 } 4393 }; 4394 } 4395 mTextView.postDelayed( 4396 mInsertionActionModeRunnable, 4397 ViewConfiguration.getDoubleTapTimeout() + 1); 4398 } 4399 4400 } 4401 4402 hideAfterDelay(); 4403 } 4404 4405 private void hideAfterDelay() { 4406 if (mHider == null) { 4407 mHider = new Runnable() { 4408 public void run() { 4409 hide(); 4410 } 4411 }; 4412 } else { 4413 removeHiderCallback(); 4414 } 4415 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4416 } 4417 4418 private void removeHiderCallback() { 4419 if (mHider != null) { 4420 mTextView.removeCallbacks(mHider); 4421 } 4422 } 4423 4424 @Override 4425 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4426 return drawable.getIntrinsicWidth() / 2; 4427 } 4428 4429 @Override 4430 protected int getHorizontalGravity(boolean isRtlRun) { 4431 return Gravity.CENTER_HORIZONTAL; 4432 } 4433 4434 @Override 4435 protected int getCursorOffset() { 4436 int offset = super.getCursorOffset(); 4437 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4438 if (cursor != null) { 4439 cursor.getPadding(mTempRect); 4440 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4441 } 4442 return offset; 4443 } 4444 4445 @Override 4446 int getCursorHorizontalPosition(Layout layout, int offset) { 4447 final Drawable drawable = mCursorCount > 0 ? mCursorDrawable[0] : null; 4448 if (drawable != null) { 4449 final float horizontal = getHorizontal(layout, offset); 4450 return clampHorizontalPosition(drawable, horizontal) + mTempRect.left; 4451 } 4452 return super.getCursorHorizontalPosition(layout, offset); 4453 } 4454 4455 @Override 4456 public boolean onTouchEvent(MotionEvent ev) { 4457 final boolean result = super.onTouchEvent(ev); 4458 4459 switch (ev.getActionMasked()) { 4460 case MotionEvent.ACTION_DOWN: 4461 mDownPositionX = ev.getRawX(); 4462 mDownPositionY = ev.getRawY(); 4463 break; 4464 4465 case MotionEvent.ACTION_UP: 4466 if (!offsetHasBeenChanged()) { 4467 final float deltaX = mDownPositionX - ev.getRawX(); 4468 final float deltaY = mDownPositionY - ev.getRawY(); 4469 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4470 4471 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4472 mTextView.getContext()); 4473 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4474 4475 if (distanceSquared < touchSlop * touchSlop) { 4476 // Tapping on the handle toggles the insertion action mode. 4477 if (mTextActionMode != null) { 4478 stopTextActionMode(); 4479 } else { 4480 startInsertionActionMode(); 4481 } 4482 } 4483 } else { 4484 if (mTextActionMode != null) { 4485 mTextActionMode.invalidateContentRect(); 4486 } 4487 } 4488 hideAfterDelay(); 4489 break; 4490 4491 case MotionEvent.ACTION_CANCEL: 4492 hideAfterDelay(); 4493 break; 4494 4495 default: 4496 break; 4497 } 4498 4499 return result; 4500 } 4501 4502 @Override 4503 public int getCurrentCursorOffset() { 4504 return mTextView.getSelectionStart(); 4505 } 4506 4507 @Override 4508 public void updateSelection(int offset) { 4509 Selection.setSelection((Spannable) mTextView.getText(), offset); 4510 } 4511 4512 @Override 4513 public void updatePosition(float x, float y) { 4514 Layout layout = mTextView.getLayout(); 4515 int offset; 4516 if (layout != null) { 4517 if (mPreviousLineTouched == UNSET_LINE) { 4518 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4519 } 4520 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4521 offset = getOffsetAtCoordinate(layout, currLine, x); 4522 mPreviousLineTouched = currLine; 4523 } else { 4524 offset = -1; 4525 } 4526 positionAtCursorOffset(offset, false); 4527 if (mTextActionMode != null) { 4528 mTextActionMode.invalidate(); 4529 } 4530 } 4531 4532 @Override 4533 void onHandleMoved() { 4534 super.onHandleMoved(); 4535 removeHiderCallback(); 4536 } 4537 4538 @Override 4539 public void onDetached() { 4540 super.onDetached(); 4541 removeHiderCallback(); 4542 } 4543 } 4544 4545 @Retention(RetentionPolicy.SOURCE) 4546 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4547 public @interface HandleType {} 4548 public static final int HANDLE_TYPE_SELECTION_START = 0; 4549 public static final int HANDLE_TYPE_SELECTION_END = 1; 4550 4551 private class SelectionHandleView extends HandleView { 4552 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4553 // end (HANDLE_TYPE_SELECTION_END). 4554 @HandleType 4555 private final int mHandleType; 4556 // Indicates whether the cursor is making adjustments within a word. 4557 private boolean mInWord = false; 4558 // Difference between touch position and word boundary position. 4559 private float mTouchWordDelta; 4560 // X value of the previous updatePosition call. 4561 private float mPrevX; 4562 // Indicates if the handle has moved a boundary between LTR and RTL text. 4563 private boolean mLanguageDirectionChanged = false; 4564 // Distance from edge of horizontally scrolling text view 4565 // to use to switch to character mode. 4566 private final float mTextViewEdgeSlop; 4567 // Used to save text view location. 4568 private final int[] mTextViewLocation = new int[2]; 4569 4570 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4571 @HandleType int handleType) { 4572 super(drawableLtr, drawableRtl, id); 4573 mHandleType = handleType; 4574 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4575 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4576 } 4577 4578 private boolean isStartHandle() { 4579 return mHandleType == HANDLE_TYPE_SELECTION_START; 4580 } 4581 4582 @Override 4583 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4584 if (isRtlRun == isStartHandle()) { 4585 return drawable.getIntrinsicWidth() / 4; 4586 } else { 4587 return (drawable.getIntrinsicWidth() * 3) / 4; 4588 } 4589 } 4590 4591 @Override 4592 protected int getHorizontalGravity(boolean isRtlRun) { 4593 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4594 } 4595 4596 @Override 4597 public int getCurrentCursorOffset() { 4598 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4599 } 4600 4601 @Override 4602 protected void updateSelection(int offset) { 4603 if (isStartHandle()) { 4604 Selection.setSelection((Spannable) mTextView.getText(), offset, 4605 mTextView.getSelectionEnd()); 4606 } else { 4607 Selection.setSelection((Spannable) mTextView.getText(), 4608 mTextView.getSelectionStart(), offset); 4609 } 4610 updateDrawable(); 4611 if (mTextActionMode != null) { 4612 mTextActionMode.invalidate(); 4613 } 4614 } 4615 4616 @Override 4617 public void updatePosition(float x, float y) { 4618 final Layout layout = mTextView.getLayout(); 4619 if (layout == null) { 4620 // HandleView will deal appropriately in positionAtCursorOffset when 4621 // layout is null. 4622 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y)); 4623 return; 4624 } 4625 4626 if (mPreviousLineTouched == UNSET_LINE) { 4627 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4628 } 4629 4630 boolean positionCursor = false; 4631 final int anotherHandleOffset = 4632 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4633 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4634 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4635 4636 if (isStartHandle() && initialOffset >= anotherHandleOffset 4637 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4638 // Handles have crossed, bound it to the first selected line and 4639 // adjust by word / char as normal. 4640 currLine = layout.getLineForOffset(anotherHandleOffset); 4641 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4642 } 4643 4644 int offset = initialOffset; 4645 final int wordEnd = getWordEnd(offset); 4646 final int wordStart = getWordStart(offset); 4647 4648 if (mPrevX == UNSET_X_VALUE) { 4649 mPrevX = x; 4650 } 4651 4652 final int currentOffset = getCurrentCursorOffset(); 4653 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4654 final boolean atRtl = isAtRtlRun(layout, offset); 4655 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4656 4657 // We can't determine if the user is expanding or shrinking the selection if they're 4658 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4659 // the cursor at the current position. 4660 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4661 // We're on a boundary or this is the first direction change -- just update 4662 // to the current position. 4663 mLanguageDirectionChanged = true; 4664 mTouchWordDelta = 0.0f; 4665 positionAndAdjustForCrossingHandles(offset); 4666 return; 4667 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4668 // We've just moved past the boundary so update the position. After this we can 4669 // figure out if the user is expanding or shrinking to go by word or character. 4670 positionAndAdjustForCrossingHandles(offset); 4671 mTouchWordDelta = 0.0f; 4672 mLanguageDirectionChanged = false; 4673 return; 4674 } 4675 4676 boolean isExpanding; 4677 final float xDiff = x - mPrevX; 4678 if (isStartHandle()) { 4679 isExpanding = currLine < mPreviousLineTouched; 4680 } else { 4681 isExpanding = currLine > mPreviousLineTouched; 4682 } 4683 if (atRtl == isStartHandle()) { 4684 isExpanding |= xDiff > 0; 4685 } else { 4686 isExpanding |= xDiff < 0; 4687 } 4688 4689 if (mTextView.getHorizontallyScrolling()) { 4690 if (positionNearEdgeOfScrollingView(x, atRtl) 4691 && ((isStartHandle() && mTextView.getScrollX() != 0) 4692 || (!isStartHandle() 4693 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4694 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4695 || (!isStartHandle() && offset > currentOffset))) 4696 || !isExpanding)) { 4697 // If we're expanding ensure that the offset is actually expanding compared to 4698 // the current offset, if the handle snapped to the word, the finger position 4699 // may be out of sync and we don't want the selection to jump back. 4700 mTouchWordDelta = 0.0f; 4701 final int nextOffset = (atRtl == isStartHandle()) 4702 ? layout.getOffsetToRightOf(mPreviousOffset) 4703 : layout.getOffsetToLeftOf(mPreviousOffset); 4704 positionAndAdjustForCrossingHandles(nextOffset); 4705 return; 4706 } 4707 } 4708 4709 if (isExpanding) { 4710 // User is increasing the selection. 4711 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4712 final boolean snapToWord = (!mInWord 4713 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 4714 && atRtl == isAtRtlRun(layout, wordBoundary); 4715 if (snapToWord) { 4716 // Sometimes words can be broken across lines (Chinese, hyphenation). 4717 // We still snap to the word boundary but we only use the letters on the 4718 // current line to determine if the user is far enough into the word to snap. 4719 if (layout.getLineForOffset(wordBoundary) != currLine) { 4720 wordBoundary = isStartHandle() ? 4721 layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4722 } 4723 final int offsetThresholdToSnap = isStartHandle() 4724 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4725 : wordStart + ((wordBoundary - wordStart) / 2); 4726 if (isStartHandle() 4727 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4728 // User is far enough into the word or on a different line so we expand by 4729 // word. 4730 offset = wordStart; 4731 } else if (!isStartHandle() 4732 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4733 // User is far enough into the word or on a different line so we expand by 4734 // word. 4735 offset = wordEnd; 4736 } else { 4737 offset = mPreviousOffset; 4738 } 4739 } 4740 if ((isStartHandle() && offset < initialOffset) 4741 || (!isStartHandle() && offset > initialOffset)) { 4742 final float adjustedX = getHorizontal(layout, offset); 4743 mTouchWordDelta = 4744 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4745 } else { 4746 mTouchWordDelta = 0.0f; 4747 } 4748 positionCursor = true; 4749 } else { 4750 final int adjustedOffset = 4751 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 4752 final boolean shrinking = isStartHandle() 4753 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4754 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4755 if (shrinking) { 4756 // User is shrinking the selection. 4757 if (currLine != mPrevLine) { 4758 // We're on a different line, so we'll snap to word boundaries. 4759 offset = isStartHandle() ? wordStart : wordEnd; 4760 if ((isStartHandle() && offset < initialOffset) 4761 || (!isStartHandle() && offset > initialOffset)) { 4762 final float adjustedX = getHorizontal(layout, offset); 4763 mTouchWordDelta = 4764 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4765 } else { 4766 mTouchWordDelta = 0.0f; 4767 } 4768 } else { 4769 offset = adjustedOffset; 4770 } 4771 positionCursor = true; 4772 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4773 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4774 // Handle has jumped to the word boundary, and the user is moving 4775 // their finger towards the handle, the delta should be updated. 4776 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) - 4777 getHorizontal(layout, mPreviousOffset); 4778 } 4779 } 4780 4781 if (positionCursor) { 4782 mPreviousLineTouched = currLine; 4783 positionAndAdjustForCrossingHandles(offset); 4784 } 4785 mPrevX = x; 4786 } 4787 4788 /** 4789 * @param offset Cursor offset. Must be in [-1, length]. 4790 * @param parentScrolled If the parent has been scrolled or not. 4791 */ 4792 @Override 4793 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4794 super.positionAtCursorOffset(offset, parentScrolled); 4795 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 4796 } 4797 4798 @Override 4799 public boolean onTouchEvent(MotionEvent event) { 4800 boolean superResult = super.onTouchEvent(event); 4801 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 4802 // Reset the touch word offset and x value when the user 4803 // re-engages the handle. 4804 mTouchWordDelta = 0.0f; 4805 mPrevX = UNSET_X_VALUE; 4806 } 4807 return superResult; 4808 } 4809 4810 private void positionAndAdjustForCrossingHandles(int offset) { 4811 final int anotherHandleOffset = 4812 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4813 if ((isStartHandle() && offset >= anotherHandleOffset) 4814 || (!isStartHandle() && offset <= anotherHandleOffset)) { 4815 mTouchWordDelta = 0.0f; 4816 final Layout layout = mTextView.getLayout(); 4817 if (layout != null && offset != anotherHandleOffset) { 4818 final float horiz = getHorizontal(layout, offset); 4819 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 4820 !isStartHandle()); 4821 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 4822 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 4823 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 4824 // This handle passes another one as it crossed a direction boundary. 4825 // Don't minimize the selection, but keep the handle at the run boundary. 4826 final int currentOffset = getCurrentCursorOffset(); 4827 final int offsetToGetRunRange = isStartHandle() ? 4828 currentOffset : Math.max(currentOffset - 1, 0); 4829 final long range = layout.getRunRange(offsetToGetRunRange); 4830 if (isStartHandle()) { 4831 offset = TextUtils.unpackRangeStartFromLong(range); 4832 } else { 4833 offset = TextUtils.unpackRangeEndFromLong(range); 4834 } 4835 positionAtCursorOffset(offset, false); 4836 return; 4837 } 4838 } 4839 // Handles can not cross and selection is at least one character. 4840 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 4841 } 4842 positionAtCursorOffset(offset, false); 4843 } 4844 4845 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 4846 mTextView.getLocationOnScreen(mTextViewLocation); 4847 boolean nearEdge; 4848 if (atRtl == isStartHandle()) { 4849 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 4850 - mTextView.getPaddingRight(); 4851 nearEdge = x > rightEdge - mTextViewEdgeSlop; 4852 } else { 4853 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 4854 nearEdge = x < leftEdge + mTextViewEdgeSlop; 4855 } 4856 return nearEdge; 4857 } 4858 4859 @Override 4860 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4861 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 4862 return layout.isRtlCharAt(offsetToCheck); 4863 } 4864 4865 @Override 4866 public float getHorizontal(@NonNull Layout layout, int offset) { 4867 return getHorizontal(layout, offset, isStartHandle()); 4868 } 4869 4870 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 4871 final int line = layout.getLineForOffset(offset); 4872 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 4873 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 4874 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 4875 return (isRtlChar == isRtlParagraph) ? 4876 layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 4877 } 4878 4879 @Override 4880 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4881 final int primaryOffset = layout.getOffsetForHorizontal(line, x, true); 4882 if (!layout.isLevelBoundary(primaryOffset)) { 4883 return primaryOffset; 4884 } 4885 final int secondaryOffset = layout.getOffsetForHorizontal(line, x, false); 4886 final int currentOffset = getCurrentCursorOffset(); 4887 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 4888 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 4889 if (primaryDiff < secondaryDiff) { 4890 return primaryOffset; 4891 } else if (primaryDiff > secondaryDiff) { 4892 return secondaryOffset; 4893 } else { 4894 final int offsetToCheck = isStartHandle() ? 4895 currentOffset : Math.max(currentOffset - 1, 0); 4896 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 4897 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 4898 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 4899 } 4900 } 4901 } 4902 4903 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 4904 final int trueLine = mTextView.getLineAtCoordinate(y); 4905 if (layout == null || prevLine > layout.getLineCount() 4906 || layout.getLineCount() <= 0 || prevLine < 0) { 4907 // Invalid parameters, just return whatever line is at y. 4908 return trueLine; 4909 } 4910 4911 if (Math.abs(trueLine - prevLine) >= 2) { 4912 // Only stick to lines if we're within a line of the previous selection. 4913 return trueLine; 4914 } 4915 4916 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 4917 final int lineCount = layout.getLineCount(); 4918 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 4919 4920 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 4921 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 4922 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 4923 4924 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 4925 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 4926 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 4927 4928 // Determine if we've moved lines based on y position and previous line. 4929 int currLine; 4930 if (y <= yTopBound) { 4931 currLine = Math.max(prevLine - 1, 0); 4932 } else if (y >= yBottomBound) { 4933 currLine = Math.min(prevLine + 1, lineCount - 1); 4934 } else { 4935 currLine = prevLine; 4936 } 4937 return currLine; 4938 } 4939 4940 /** 4941 * A CursorController instance can be used to control a cursor in the text. 4942 */ 4943 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4944 /** 4945 * Makes the cursor controller visible on screen. 4946 * See also {@link #hide()}. 4947 */ 4948 public void show(); 4949 4950 /** 4951 * Hide the cursor controller from screen. 4952 * See also {@link #show()}. 4953 */ 4954 public void hide(); 4955 4956 /** 4957 * Called when the view is detached from window. Perform house keeping task, such as 4958 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4959 * preventing the activity from being recycled. 4960 */ 4961 public void onDetached(); 4962 4963 public boolean isCursorBeingModified(); 4964 4965 public boolean isActive(); 4966 } 4967 4968 private class InsertionPointCursorController implements CursorController { 4969 private InsertionHandleView mHandle; 4970 4971 public void show() { 4972 getHandle().show(); 4973 4974 if (mSelectionModifierCursorController != null) { 4975 mSelectionModifierCursorController.hide(); 4976 } 4977 } 4978 4979 public void hide() { 4980 if (mHandle != null) { 4981 mHandle.hide(); 4982 } 4983 } 4984 4985 public void onTouchModeChanged(boolean isInTouchMode) { 4986 if (!isInTouchMode) { 4987 hide(); 4988 } 4989 } 4990 4991 private InsertionHandleView getHandle() { 4992 if (mSelectHandleCenter == null) { 4993 mSelectHandleCenter = mTextView.getContext().getDrawable( 4994 mTextView.mTextSelectHandleRes); 4995 } 4996 if (mHandle == null) { 4997 mHandle = new InsertionHandleView(mSelectHandleCenter); 4998 } 4999 return mHandle; 5000 } 5001 5002 @Override 5003 public void onDetached() { 5004 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5005 observer.removeOnTouchModeChangeListener(this); 5006 5007 if (mHandle != null) mHandle.onDetached(); 5008 } 5009 5010 @Override 5011 public boolean isCursorBeingModified() { 5012 return mHandle != null && mHandle.isDragging(); 5013 } 5014 5015 @Override 5016 public boolean isActive() { 5017 return mHandle != null && mHandle.isShowing(); 5018 } 5019 } 5020 5021 class SelectionModifierCursorController implements CursorController { 5022 // The cursor controller handles, lazily created when shown. 5023 private SelectionHandleView mStartHandle; 5024 private SelectionHandleView mEndHandle; 5025 // The offsets of that last touch down event. Remembered to start selection there. 5026 private int mMinTouchOffset, mMaxTouchOffset; 5027 5028 private float mDownPositionX, mDownPositionY; 5029 private boolean mGestureStayedInTapRegion; 5030 5031 // Where the user first starts the drag motion. 5032 private int mStartOffset = -1; 5033 5034 private boolean mHaventMovedEnoughToStartDrag; 5035 // The line that a selection happened most recently with the drag accelerator. 5036 private int mLineSelectionIsOn = -1; 5037 // Whether the drag accelerator has selected past the initial line. 5038 private boolean mSwitchedLines = false; 5039 5040 // Indicates the drag accelerator mode that the user is currently using. 5041 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5042 // Drag accelerator is inactive. 5043 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5044 // Character based selection by dragging. Only for mouse. 5045 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5046 // Word based selection by dragging. Enabled after long pressing or double tapping. 5047 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5048 // Paragraph based selection by dragging. Enabled after mouse triple click. 5049 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5050 5051 SelectionModifierCursorController() { 5052 resetTouchOffsets(); 5053 } 5054 5055 public void show() { 5056 if (mTextView.isInBatchEditMode()) { 5057 return; 5058 } 5059 initDrawables(); 5060 initHandles(); 5061 } 5062 5063 private void initDrawables() { 5064 if (mSelectHandleLeft == null) { 5065 mSelectHandleLeft = mTextView.getContext().getDrawable( 5066 mTextView.mTextSelectHandleLeftRes); 5067 } 5068 if (mSelectHandleRight == null) { 5069 mSelectHandleRight = mTextView.getContext().getDrawable( 5070 mTextView.mTextSelectHandleRightRes); 5071 } 5072 } 5073 5074 private void initHandles() { 5075 // Lazy object creation has to be done before updatePosition() is called. 5076 if (mStartHandle == null) { 5077 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5078 com.android.internal.R.id.selection_start_handle, 5079 HANDLE_TYPE_SELECTION_START); 5080 } 5081 if (mEndHandle == null) { 5082 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5083 com.android.internal.R.id.selection_end_handle, 5084 HANDLE_TYPE_SELECTION_END); 5085 } 5086 5087 mStartHandle.show(); 5088 mEndHandle.show(); 5089 5090 hideInsertionPointCursorController(); 5091 } 5092 5093 public void hide() { 5094 if (mStartHandle != null) mStartHandle.hide(); 5095 if (mEndHandle != null) mEndHandle.hide(); 5096 } 5097 5098 public void enterDrag(int dragAcceleratorMode) { 5099 // Just need to init the handles / hide insertion cursor. 5100 show(); 5101 mDragAcceleratorMode = dragAcceleratorMode; 5102 // Start location of selection. 5103 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5104 mLastDownPositionY); 5105 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5106 // Don't show the handles until user has lifted finger. 5107 hide(); 5108 5109 // This stops scrolling parents from intercepting the touch event, allowing 5110 // the user to continue dragging across the screen to select text; TextView will 5111 // scroll as necessary. 5112 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5113 mTextView.cancelLongPress(); 5114 } 5115 5116 public void onTouchEvent(MotionEvent event) { 5117 // This is done even when the View does not have focus, so that long presses can start 5118 // selection and tap can move cursor from this tap position. 5119 final float eventX = event.getX(); 5120 final float eventY = event.getY(); 5121 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5122 switch (event.getActionMasked()) { 5123 case MotionEvent.ACTION_DOWN: 5124 if (extractedTextModeWillBeStarted()) { 5125 // Prevent duplicating the selection handles until the mode starts. 5126 hide(); 5127 } else { 5128 // Remember finger down position, to be able to start selection from there. 5129 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5130 eventX, eventY); 5131 5132 // Double tap detection 5133 if (mGestureStayedInTapRegion) { 5134 if (mTapState == TAP_STATE_DOUBLE_TAP 5135 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5136 final float deltaX = eventX - mDownPositionX; 5137 final float deltaY = eventY - mDownPositionY; 5138 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5139 5140 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5141 mTextView.getContext()); 5142 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5143 boolean stayedInArea = 5144 distanceSquared < doubleTapSlop * doubleTapSlop; 5145 5146 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5147 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5148 selectCurrentWordAndStartDrag(); 5149 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5150 selectCurrentParagraphAndStartDrag(); 5151 } 5152 mDiscardNextActionUp = true; 5153 } 5154 } 5155 } 5156 5157 mDownPositionX = eventX; 5158 mDownPositionY = eventY; 5159 mGestureStayedInTapRegion = true; 5160 mHaventMovedEnoughToStartDrag = true; 5161 } 5162 break; 5163 5164 case MotionEvent.ACTION_POINTER_DOWN: 5165 case MotionEvent.ACTION_POINTER_UP: 5166 // Handle multi-point gestures. Keep min and max offset positions. 5167 // Only activated for devices that correctly handle multi-touch. 5168 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5169 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5170 updateMinAndMaxOffsets(event); 5171 } 5172 break; 5173 5174 case MotionEvent.ACTION_MOVE: 5175 final ViewConfiguration viewConfig = ViewConfiguration.get( 5176 mTextView.getContext()); 5177 final int touchSlop = viewConfig.getScaledTouchSlop(); 5178 5179 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5180 final float deltaX = eventX - mDownPositionX; 5181 final float deltaY = eventY - mDownPositionY; 5182 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5183 5184 if (mGestureStayedInTapRegion) { 5185 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5186 mGestureStayedInTapRegion = 5187 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5188 } 5189 if (mHaventMovedEnoughToStartDrag) { 5190 // We don't start dragging until the user has moved enough. 5191 mHaventMovedEnoughToStartDrag = 5192 distanceSquared <= touchSlop * touchSlop; 5193 } 5194 } 5195 5196 if (isMouse && !isDragAcceleratorActive()) { 5197 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5198 if (mTextView.hasSelection() 5199 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5200 && offset >= mTextView.getSelectionStart() 5201 && offset <= mTextView.getSelectionEnd()) { 5202 startDragAndDrop(); 5203 break; 5204 } 5205 5206 if (mStartOffset != offset) { 5207 // Start character based drag accelerator. 5208 stopTextActionMode(); 5209 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5210 mDiscardNextActionUp = true; 5211 mHaventMovedEnoughToStartDrag = false; 5212 } 5213 } 5214 5215 if (mStartHandle != null && mStartHandle.isShowing()) { 5216 // Don't do the drag if the handles are showing already. 5217 break; 5218 } 5219 5220 updateSelection(event); 5221 break; 5222 5223 case MotionEvent.ACTION_UP: 5224 if (!isDragAcceleratorActive()) { 5225 break; 5226 } 5227 updateSelection(event); 5228 5229 // No longer dragging to select text, let the parent intercept events. 5230 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5231 5232 // No longer the first dragging motion, reset. 5233 resetDragAcceleratorState(); 5234 5235 if (mTextView.hasSelection()) { 5236 startSelectionActionMode(); 5237 } 5238 break; 5239 } 5240 } 5241 5242 private void updateSelection(MotionEvent event) { 5243 if (mTextView.getLayout() != null) { 5244 switch (mDragAcceleratorMode) { 5245 case DRAG_ACCELERATOR_MODE_CHARACTER: 5246 updateCharacterBasedSelection(event); 5247 break; 5248 case DRAG_ACCELERATOR_MODE_WORD: 5249 updateWordBasedSelection(event); 5250 break; 5251 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5252 updateParagraphBasedSelection(event); 5253 break; 5254 } 5255 } 5256 } 5257 5258 /** 5259 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5260 * 5261 * @return true if the drag was started. 5262 */ 5263 private boolean selectCurrentParagraphAndStartDrag() { 5264 if (mInsertionActionModeRunnable != null) { 5265 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5266 } 5267 stopTextActionMode(); 5268 if (!selectCurrentParagraph()) { 5269 return false; 5270 } 5271 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5272 return true; 5273 } 5274 5275 private void updateCharacterBasedSelection(MotionEvent event) { 5276 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5277 Selection.setSelection((Spannable) mTextView.getText(), mStartOffset, offset); 5278 } 5279 5280 private void updateWordBasedSelection(MotionEvent event) { 5281 if (mHaventMovedEnoughToStartDrag) { 5282 return; 5283 } 5284 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5285 final ViewConfiguration viewConfig = ViewConfiguration.get( 5286 mTextView.getContext()); 5287 final float eventX = event.getX(); 5288 final float eventY = event.getY(); 5289 final int currLine; 5290 if (isMouse) { 5291 // No need to offset the y coordinate for mouse input. 5292 currLine = mTextView.getLineAtCoordinate(eventY); 5293 } else { 5294 float y = eventY; 5295 if (mSwitchedLines) { 5296 // Offset the finger by the same vertical offset as the handles. 5297 // This improves visibility of the content being selected by 5298 // shifting the finger below the content, this is applied once 5299 // the user has switched lines. 5300 final int touchSlop = viewConfig.getScaledTouchSlop(); 5301 final float fingerOffset = (mStartHandle != null) 5302 ? mStartHandle.getIdealVerticalOffset() 5303 : touchSlop; 5304 y = eventY - fingerOffset; 5305 } 5306 5307 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5308 y); 5309 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5310 // Break early here, we want to offset the finger position from 5311 // the selection highlight, once the user moved their finger 5312 // to a different line we should apply the offset and *not* switch 5313 // lines until recomputing the position with the finger offset. 5314 mSwitchedLines = true; 5315 return; 5316 } 5317 } 5318 5319 int startOffset; 5320 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5321 // Snap to word boundaries. 5322 if (mStartOffset < offset) { 5323 // Expanding with end handle. 5324 offset = getWordEnd(offset); 5325 startOffset = getWordStart(mStartOffset); 5326 } else { 5327 // Expanding with start handle. 5328 offset = getWordStart(offset); 5329 startOffset = getWordEnd(mStartOffset); 5330 } 5331 mLineSelectionIsOn = currLine; 5332 Selection.setSelection((Spannable) mTextView.getText(), 5333 startOffset, offset); 5334 } 5335 5336 private void updateParagraphBasedSelection(MotionEvent event) { 5337 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5338 5339 final int start = Math.min(offset, mStartOffset); 5340 final int end = Math.max(offset, mStartOffset); 5341 final long paragraphsRange = getParagraphsRange(start, end); 5342 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5343 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5344 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5345 } 5346 5347 /** 5348 * @param event 5349 */ 5350 private void updateMinAndMaxOffsets(MotionEvent event) { 5351 int pointerCount = event.getPointerCount(); 5352 for (int index = 0; index < pointerCount; index++) { 5353 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5354 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5355 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5356 } 5357 } 5358 5359 public int getMinTouchOffset() { 5360 return mMinTouchOffset; 5361 } 5362 5363 public int getMaxTouchOffset() { 5364 return mMaxTouchOffset; 5365 } 5366 5367 public void resetTouchOffsets() { 5368 mMinTouchOffset = mMaxTouchOffset = -1; 5369 resetDragAcceleratorState(); 5370 } 5371 5372 private void resetDragAcceleratorState() { 5373 mStartOffset = -1; 5374 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5375 mSwitchedLines = false; 5376 final int selectionStart = mTextView.getSelectionStart(); 5377 final int selectionEnd = mTextView.getSelectionEnd(); 5378 if (selectionStart > selectionEnd) { 5379 Selection.setSelection((Spannable) mTextView.getText(), 5380 selectionEnd, selectionStart); 5381 } 5382 } 5383 5384 /** 5385 * @return true iff this controller is currently used to move the selection start. 5386 */ 5387 public boolean isSelectionStartDragged() { 5388 return mStartHandle != null && mStartHandle.isDragging(); 5389 } 5390 5391 @Override 5392 public boolean isCursorBeingModified() { 5393 return isDragAcceleratorActive() || isSelectionStartDragged() 5394 || (mEndHandle != null && mEndHandle.isDragging()); 5395 } 5396 5397 /** 5398 * @return true if the user is selecting text using the drag accelerator. 5399 */ 5400 public boolean isDragAcceleratorActive() { 5401 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5402 } 5403 5404 public void onTouchModeChanged(boolean isInTouchMode) { 5405 if (!isInTouchMode) { 5406 hide(); 5407 } 5408 } 5409 5410 @Override 5411 public void onDetached() { 5412 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5413 observer.removeOnTouchModeChangeListener(this); 5414 5415 if (mStartHandle != null) mStartHandle.onDetached(); 5416 if (mEndHandle != null) mEndHandle.onDetached(); 5417 } 5418 5419 @Override 5420 public boolean isActive() { 5421 return mStartHandle != null && mStartHandle.isShowing(); 5422 } 5423 } 5424 5425 private class CorrectionHighlighter { 5426 private final Path mPath = new Path(); 5427 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5428 private int mStart, mEnd; 5429 private long mFadingStartTime; 5430 private RectF mTempRectF; 5431 private final static int FADE_OUT_DURATION = 400; 5432 5433 public CorrectionHighlighter() { 5434 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 5435 applicationScale); 5436 mPaint.setStyle(Paint.Style.FILL); 5437 } 5438 5439 public void highlight(CorrectionInfo info) { 5440 mStart = info.getOffset(); 5441 mEnd = mStart + info.getNewText().length(); 5442 mFadingStartTime = SystemClock.uptimeMillis(); 5443 5444 if (mStart < 0 || mEnd < 0) { 5445 stopAnimation(); 5446 } 5447 } 5448 5449 public void draw(Canvas canvas, int cursorOffsetVertical) { 5450 if (updatePath() && updatePaint()) { 5451 if (cursorOffsetVertical != 0) { 5452 canvas.translate(0, cursorOffsetVertical); 5453 } 5454 5455 canvas.drawPath(mPath, mPaint); 5456 5457 if (cursorOffsetVertical != 0) { 5458 canvas.translate(0, -cursorOffsetVertical); 5459 } 5460 invalidate(true); // TODO invalidate cursor region only 5461 } else { 5462 stopAnimation(); 5463 invalidate(false); // TODO invalidate cursor region only 5464 } 5465 } 5466 5467 private boolean updatePaint() { 5468 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5469 if (duration > FADE_OUT_DURATION) return false; 5470 5471 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5472 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5473 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 5474 ((int) (highlightColorAlpha * coef) << 24); 5475 mPaint.setColor(color); 5476 return true; 5477 } 5478 5479 private boolean updatePath() { 5480 final Layout layout = mTextView.getLayout(); 5481 if (layout == null) return false; 5482 5483 // Update in case text is edited while the animation is run 5484 final int length = mTextView.getText().length(); 5485 int start = Math.min(length, mStart); 5486 int end = Math.min(length, mEnd); 5487 5488 mPath.reset(); 5489 layout.getSelectionPath(start, end, mPath); 5490 return true; 5491 } 5492 5493 private void invalidate(boolean delayed) { 5494 if (mTextView.getLayout() == null) return; 5495 5496 if (mTempRectF == null) mTempRectF = new RectF(); 5497 mPath.computeBounds(mTempRectF, false); 5498 5499 int left = mTextView.getCompoundPaddingLeft(); 5500 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5501 5502 if (delayed) { 5503 mTextView.postInvalidateOnAnimation( 5504 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5505 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5506 } else { 5507 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5508 (int) mTempRectF.right, (int) mTempRectF.bottom); 5509 } 5510 } 5511 5512 private void stopAnimation() { 5513 Editor.this.mCorrectionHighlighter = null; 5514 } 5515 } 5516 5517 private static class ErrorPopup extends PopupWindow { 5518 private boolean mAbove = false; 5519 private final TextView mView; 5520 private int mPopupInlineErrorBackgroundId = 0; 5521 private int mPopupInlineErrorAboveBackgroundId = 0; 5522 5523 ErrorPopup(TextView v, int width, int height) { 5524 super(v, width, height); 5525 mView = v; 5526 // Make sure the TextView has a background set as it will be used the first time it is 5527 // shown and positioned. Initialized with below background, which should have 5528 // dimensions identical to the above version for this to work (and is more likely). 5529 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5530 com.android.internal.R.styleable.Theme_errorMessageBackground); 5531 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5532 } 5533 5534 void fixDirection(boolean above) { 5535 mAbove = above; 5536 5537 if (above) { 5538 mPopupInlineErrorAboveBackgroundId = 5539 getResourceId(mPopupInlineErrorAboveBackgroundId, 5540 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5541 } else { 5542 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5543 com.android.internal.R.styleable.Theme_errorMessageBackground); 5544 } 5545 5546 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 5547 mPopupInlineErrorBackgroundId); 5548 } 5549 5550 private int getResourceId(int currentId, int index) { 5551 if (currentId == 0) { 5552 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5553 R.styleable.Theme); 5554 currentId = styledAttributes.getResourceId(index, 0); 5555 styledAttributes.recycle(); 5556 } 5557 return currentId; 5558 } 5559 5560 @Override 5561 public void update(int x, int y, int w, int h, boolean force) { 5562 super.update(x, y, w, h, force); 5563 5564 boolean above = isAboveAnchor(); 5565 if (above != mAbove) { 5566 fixDirection(above); 5567 } 5568 } 5569 } 5570 5571 static class InputContentType { 5572 int imeOptions = EditorInfo.IME_NULL; 5573 String privateImeOptions; 5574 CharSequence imeActionLabel; 5575 int imeActionId; 5576 Bundle extras; 5577 OnEditorActionListener onEditorActionListener; 5578 boolean enterDown; 5579 LocaleList imeHintLocales; 5580 } 5581 5582 static class InputMethodState { 5583 ExtractedTextRequest mExtractedTextRequest; 5584 final ExtractedText mExtractedText = new ExtractedText(); 5585 int mBatchEditNesting; 5586 boolean mCursorChanged; 5587 boolean mSelectionModeChanged; 5588 boolean mContentChanged; 5589 int mChangedStart, mChangedEnd, mChangedDelta; 5590 } 5591 5592 /** 5593 * @return True iff (start, end) is a valid range within the text. 5594 */ 5595 private static boolean isValidRange(CharSequence text, int start, int end) { 5596 return 0 <= start && start <= end && end <= text.length(); 5597 } 5598 5599 @VisibleForTesting 5600 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5601 return mSuggestionsPopupWindow; 5602 } 5603 5604 /** 5605 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5606 * text being typed (and hence always returns null from the filter() method). 5607 */ 5608 public static class UndoInputFilter implements InputFilter { 5609 private final Editor mEditor; 5610 5611 // Whether the current filter pass is directly caused by an end-user text edit. 5612 private boolean mIsUserEdit; 5613 5614 // Whether the text field is handling an IME composition. Must be parceled in case the user 5615 // rotates the screen during composition. 5616 private boolean mHasComposition; 5617 5618 // Whether to merge events into one operation. 5619 private boolean mForceMerge; 5620 5621 public UndoInputFilter(Editor editor) { 5622 mEditor = editor; 5623 } 5624 5625 public void saveInstanceState(Parcel parcel) { 5626 parcel.writeInt(mIsUserEdit ? 1 : 0); 5627 parcel.writeInt(mHasComposition ? 1 : 0); 5628 } 5629 5630 public void restoreInstanceState(Parcel parcel) { 5631 mIsUserEdit = parcel.readInt() != 0; 5632 mHasComposition = parcel.readInt() != 0; 5633 } 5634 5635 public void setForceMerge(boolean forceMerge) { 5636 mForceMerge = forceMerge; 5637 } 5638 5639 /** 5640 * Signals that a user-triggered edit is starting. 5641 */ 5642 public void beginBatchEdit() { 5643 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5644 mIsUserEdit = true; 5645 } 5646 5647 public void endBatchEdit() { 5648 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5649 mIsUserEdit = false; 5650 } 5651 5652 @Override 5653 public CharSequence filter(CharSequence source, int start, int end, 5654 Spanned dest, int dstart, int dend) { 5655 if (DEBUG_UNDO) { 5656 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 5657 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5658 } 5659 5660 // Check to see if this edit should be tracked for undo. 5661 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5662 return null; 5663 } 5664 5665 // Check for and handle IME composition edits. 5666 if (handleCompositionEdit(source, start, end, dstart)) { 5667 return null; 5668 } 5669 5670 // Handle keyboard edits. 5671 handleKeyboardEdit(source, start, end, dest, dstart, dend); 5672 return null; 5673 } 5674 5675 /** 5676 * Returns true iff the edit was handled, either because it should be ignored or because 5677 * this function created an undo operation for it. 5678 */ 5679 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 5680 // Ignore edits while the user is composing. 5681 if (isComposition(source)) { 5682 mHasComposition = true; 5683 return true; 5684 } 5685 final boolean hadComposition = mHasComposition; 5686 mHasComposition = false; 5687 5688 // Check for the transition out of the composing state. 5689 if (hadComposition) { 5690 // If there was no text the user canceled composition. Ignore the edit. 5691 if (start == end) { 5692 return true; 5693 } 5694 5695 // Otherwise the user inserted the composition. 5696 String newText = TextUtils.substring(source, start, end); 5697 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 5698 recordEdit(edit, mForceMerge); 5699 return true; 5700 } 5701 5702 // This was neither a composition event nor a transition out of composing. 5703 return false; 5704 } 5705 5706 private void handleKeyboardEdit(CharSequence source, int start, int end, 5707 Spanned dest, int dstart, int dend) { 5708 // An application may install a TextWatcher to provide additional modifications after 5709 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5710 // string). This results in multiple filter() calls for what the user considers to be 5711 // a single operation. Always undo the whole set of changes in one step. 5712 final boolean forceMerge = mForceMerge || isInTextWatcher(); 5713 5714 // Build a new operation with all the information from this edit. 5715 String newText = TextUtils.substring(source, start, end); 5716 String oldText = TextUtils.substring(dest, dstart, dend); 5717 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 5718 recordEdit(edit, forceMerge); 5719 } 5720 5721 /** 5722 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5723 * If forceMerge is true then the new edit is always merged. 5724 */ 5725 private void recordEdit(EditOperation edit, boolean forceMerge) { 5726 // Fetch the last edit operation and attempt to merge in the new edit. 5727 final UndoManager um = mEditor.mUndoManager; 5728 um.beginUpdate("Edit text"); 5729 EditOperation lastEdit = um.getLastOperation( 5730 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5731 if (lastEdit == null) { 5732 // Add this as the first edit. 5733 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5734 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5735 } else if (forceMerge) { 5736 // Forced merges take priority because they could be the result of a non-user-edit 5737 // change and this case should not create a new undo operation. 5738 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5739 lastEdit.forceMergeWith(edit); 5740 } else if (!mIsUserEdit) { 5741 // An application directly modified the Editable outside of a text edit. Treat this 5742 // as a new change and don't attempt to merge. 5743 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5744 um.commitState(mEditor.mUndoOwner); 5745 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5746 } else if (lastEdit.mergeWith(edit)) { 5747 // Merge succeeded, nothing else to do. 5748 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5749 } else { 5750 // Could not merge with the last edit, so commit the last edit and add this edit. 5751 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5752 um.commitState(mEditor.mUndoOwner); 5753 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5754 } 5755 um.endUpdate(); 5756 } 5757 5758 private boolean canUndoEdit(CharSequence source, int start, int end, 5759 Spanned dest, int dstart, int dend) { 5760 if (!mEditor.mAllowUndo) { 5761 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5762 return false; 5763 } 5764 5765 if (mEditor.mUndoManager.isInUndo()) { 5766 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5767 return false; 5768 } 5769 5770 // Text filters run before input operations are applied. However, some input operations 5771 // are invalid and will throw exceptions when applied. This is common in tests. Don't 5772 // attempt to undo invalid operations. 5773 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 5774 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 5775 return false; 5776 } 5777 5778 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 5779 // on an input field. Skip no-op changes. 5780 if (start == end && dstart == dend) { 5781 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 5782 return false; 5783 } 5784 5785 return true; 5786 } 5787 5788 private boolean isComposition(CharSequence source) { 5789 if (!(source instanceof Spannable)) { 5790 return false; 5791 } 5792 // This is a composition edit if the source has a non-zero-length composing span. 5793 Spannable text = (Spannable) source; 5794 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 5795 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 5796 return composeBegin < composeEnd; 5797 } 5798 5799 private boolean isInTextWatcher() { 5800 CharSequence text = mEditor.mTextView.getText(); 5801 return (text instanceof SpannableStringBuilder) 5802 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 5803 } 5804 } 5805 5806 /** 5807 * An operation to undo a single "edit" to a text view. 5808 */ 5809 public static class EditOperation extends UndoOperation<Editor> { 5810 private static final int TYPE_INSERT = 0; 5811 private static final int TYPE_DELETE = 1; 5812 private static final int TYPE_REPLACE = 2; 5813 5814 private int mType; 5815 private String mOldText; 5816 private int mOldTextStart; 5817 private String mNewText; 5818 private int mNewTextStart; 5819 5820 private int mOldCursorPos; 5821 private int mNewCursorPos; 5822 5823 /** 5824 * Constructs an edit operation from a text input operation on editor that replaces the 5825 * oldText starting at dstart with newText. 5826 */ 5827 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 5828 super(editor.mUndoOwner); 5829 mOldText = oldText; 5830 mNewText = newText; 5831 5832 // Determine the type of the edit and store where it occurred. Avoid storing 5833 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 5834 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 5835 // outside the bounds of the final text). 5836 if (mNewText.length() > 0 && mOldText.length() == 0) { 5837 mType = TYPE_INSERT; 5838 mNewTextStart = dstart; 5839 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 5840 mType = TYPE_DELETE; 5841 mOldTextStart = dstart; 5842 } else { 5843 mType = TYPE_REPLACE; 5844 mOldTextStart = mNewTextStart = dstart; 5845 } 5846 5847 // Store cursor data. 5848 mOldCursorPos = editor.mTextView.getSelectionStart(); 5849 mNewCursorPos = dstart + mNewText.length(); 5850 } 5851 5852 public EditOperation(Parcel src, ClassLoader loader) { 5853 super(src, loader); 5854 mType = src.readInt(); 5855 mOldText = src.readString(); 5856 mOldTextStart = src.readInt(); 5857 mNewText = src.readString(); 5858 mNewTextStart = src.readInt(); 5859 mOldCursorPos = src.readInt(); 5860 mNewCursorPos = src.readInt(); 5861 } 5862 5863 @Override 5864 public void writeToParcel(Parcel dest, int flags) { 5865 dest.writeInt(mType); 5866 dest.writeString(mOldText); 5867 dest.writeInt(mOldTextStart); 5868 dest.writeString(mNewText); 5869 dest.writeInt(mNewTextStart); 5870 dest.writeInt(mOldCursorPos); 5871 dest.writeInt(mNewCursorPos); 5872 } 5873 5874 private int getNewTextEnd() { 5875 return mNewTextStart + mNewText.length(); 5876 } 5877 5878 private int getOldTextEnd() { 5879 return mOldTextStart + mOldText.length(); 5880 } 5881 5882 @Override 5883 public void commit() { 5884 } 5885 5886 @Override 5887 public void undo() { 5888 if (DEBUG_UNDO) Log.d(TAG, "undo"); 5889 // Remove the new text and insert the old. 5890 Editor editor = getOwnerData(); 5891 Editable text = (Editable) editor.mTextView.getText(); 5892 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5893 mOldCursorPos); 5894 } 5895 5896 @Override 5897 public void redo() { 5898 if (DEBUG_UNDO) Log.d(TAG, "redo"); 5899 // Remove the old text and insert the new. 5900 Editor editor = getOwnerData(); 5901 Editable text = (Editable) editor.mTextView.getText(); 5902 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 5903 mNewCursorPos); 5904 } 5905 5906 /** 5907 * Attempts to merge this existing operation with a new edit. 5908 * @param edit The new edit operation. 5909 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 5910 * object unchanged. 5911 */ 5912 private boolean mergeWith(EditOperation edit) { 5913 if (DEBUG_UNDO) { 5914 Log.d(TAG, "mergeWith old " + this); 5915 Log.d(TAG, "mergeWith new " + edit); 5916 } 5917 switch (mType) { 5918 case TYPE_INSERT: 5919 return mergeInsertWith(edit); 5920 case TYPE_DELETE: 5921 return mergeDeleteWith(edit); 5922 case TYPE_REPLACE: 5923 return mergeReplaceWith(edit); 5924 default: 5925 return false; 5926 } 5927 } 5928 5929 private boolean mergeInsertWith(EditOperation edit) { 5930 // Only merge continuous insertions. 5931 if (edit.mType != TYPE_INSERT) { 5932 return false; 5933 } 5934 // Only merge insertions that are contiguous. 5935 if (getNewTextEnd() != edit.mNewTextStart) { 5936 return false; 5937 } 5938 mNewText += edit.mNewText; 5939 mNewCursorPos = edit.mNewCursorPos; 5940 return true; 5941 } 5942 5943 // TODO: Support forward delete. 5944 private boolean mergeDeleteWith(EditOperation edit) { 5945 // Only merge continuous deletes. 5946 if (edit.mType != TYPE_DELETE) { 5947 return false; 5948 } 5949 // Only merge deletions that are contiguous. 5950 if (mOldTextStart != edit.getOldTextEnd()) { 5951 return false; 5952 } 5953 mOldTextStart = edit.mOldTextStart; 5954 mOldText = edit.mOldText + mOldText; 5955 mNewCursorPos = edit.mNewCursorPos; 5956 return true; 5957 } 5958 5959 private boolean mergeReplaceWith(EditOperation edit) { 5960 // Replacements can merge only with adjacent inserts. 5961 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 5962 return false; 5963 } 5964 mOldText += edit.mOldText; 5965 mNewText += edit.mNewText; 5966 mNewCursorPos = edit.mNewCursorPos; 5967 return true; 5968 } 5969 5970 /** 5971 * Forcibly creates a single merged edit operation by simulating the entire text 5972 * contents being replaced. 5973 */ 5974 public void forceMergeWith(EditOperation edit) { 5975 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5976 Editor editor = getOwnerData(); 5977 5978 // Copy the text of the current field. 5979 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5980 // but would require two parallel implementations of modifyText() because Editable and 5981 // StringBuilder do not share an interface for replace/delete/insert. 5982 Editable editable = (Editable) editor.mTextView.getText(); 5983 Editable originalText = new SpannableStringBuilder(editable.toString()); 5984 5985 // Roll back the last operation. 5986 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5987 mOldCursorPos); 5988 5989 // Clone the text again and apply the new operation. 5990 Editable finalText = new SpannableStringBuilder(editable.toString()); 5991 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5992 edit.mNewTextStart, edit.mNewCursorPos); 5993 5994 // Convert this operation into a non-mergeable replacement of the entire string. 5995 mType = TYPE_REPLACE; 5996 mNewText = finalText.toString(); 5997 mNewTextStart = 0; 5998 mOldText = originalText.toString(); 5999 mOldTextStart = 0; 6000 mNewCursorPos = edit.mNewCursorPos; 6001 // mOldCursorPos is unchanged. 6002 } 6003 6004 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6005 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6006 // Apply the edit if it is still valid. 6007 if (isValidRange(text, deleteFrom, deleteTo) && 6008 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6009 if (deleteFrom != deleteTo) { 6010 text.delete(deleteFrom, deleteTo); 6011 } 6012 if (newText.length() != 0) { 6013 text.insert(newTextInsertAt, newText); 6014 } 6015 } 6016 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6017 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6018 // TODO: Select all the text that was undone. 6019 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6020 Selection.setSelection(text, newCursorPos); 6021 } 6022 } 6023 6024 private String getTypeString() { 6025 switch (mType) { 6026 case TYPE_INSERT: 6027 return "insert"; 6028 case TYPE_DELETE: 6029 return "delete"; 6030 case TYPE_REPLACE: 6031 return "replace"; 6032 default: 6033 return ""; 6034 } 6035 } 6036 6037 @Override 6038 public String toString() { 6039 return "[mType=" + getTypeString() + ", " + 6040 "mOldText=" + mOldText + ", " + 6041 "mOldTextStart=" + mOldTextStart + ", " + 6042 "mNewText=" + mNewText + ", " + 6043 "mNewTextStart=" + mNewTextStart + ", " + 6044 "mOldCursorPos=" + mOldCursorPos + ", " + 6045 "mNewCursorPos=" + mNewCursorPos + "]"; 6046 } 6047 6048 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 6049 = new Parcelable.ClassLoaderCreator<EditOperation>() { 6050 @Override 6051 public EditOperation createFromParcel(Parcel in) { 6052 return new EditOperation(in, null); 6053 } 6054 6055 @Override 6056 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6057 return new EditOperation(in, loader); 6058 } 6059 6060 @Override 6061 public EditOperation[] newArray(int size) { 6062 return new EditOperation[size]; 6063 } 6064 }; 6065 } 6066 6067 /** 6068 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6069 * These allow external applications to plug into currently selected text. 6070 */ 6071 static final class ProcessTextIntentActionsHandler { 6072 6073 private final Editor mEditor; 6074 private final TextView mTextView; 6075 private final PackageManager mPackageManager; 6076 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<Intent>(); 6077 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions 6078 = new SparseArray<AccessibilityNodeInfo.AccessibilityAction>(); 6079 6080 private ProcessTextIntentActionsHandler(Editor editor) { 6081 mEditor = Preconditions.checkNotNull(editor); 6082 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6083 mPackageManager = Preconditions.checkNotNull( 6084 mTextView.getContext().getPackageManager()); 6085 } 6086 6087 /** 6088 * Adds "PROCESS_TEXT" menu items to the specified menu. 6089 */ 6090 public void onInitializeMenu(Menu menu) { 6091 int i = 0; 6092 for (ResolveInfo resolveInfo : getSupportedActivities()) { 6093 menu.add(Menu.NONE, Menu.NONE, 6094 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6095 getLabel(resolveInfo)) 6096 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6097 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6098 } 6099 } 6100 6101 /** 6102 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6103 * menu item. 6104 * 6105 * @return True if the action was performed, false otherwise. 6106 */ 6107 public boolean performMenuItemAction(MenuItem item) { 6108 return fireIntent(item.getIntent()); 6109 } 6110 6111 /** 6112 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6113 */ 6114 public void initializeAccessibilityActions() { 6115 mAccessibilityIntents.clear(); 6116 mAccessibilityActions.clear(); 6117 int i = 0; 6118 for (ResolveInfo resolveInfo : getSupportedActivities()) { 6119 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6120 mAccessibilityActions.put( 6121 actionId, 6122 new AccessibilityNodeInfo.AccessibilityAction( 6123 actionId, getLabel(resolveInfo))); 6124 mAccessibilityIntents.put( 6125 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6126 } 6127 } 6128 6129 /** 6130 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6131 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6132 * latest accessibility actions available for this call. 6133 */ 6134 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6135 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6136 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6137 } 6138 } 6139 6140 /** 6141 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6142 * accessibility action id. 6143 * 6144 * @return True if the action was performed, false otherwise. 6145 */ 6146 public boolean performAccessibilityAction(int actionId) { 6147 return fireIntent(mAccessibilityIntents.get(actionId)); 6148 } 6149 6150 private boolean fireIntent(Intent intent) { 6151 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6152 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 6153 mEditor.mPreserveSelection = true; 6154 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6155 return true; 6156 } 6157 return false; 6158 } 6159 6160 private List<ResolveInfo> getSupportedActivities() { 6161 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6162 return packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6163 } 6164 6165 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6166 return createProcessTextIntent() 6167 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6168 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6169 } 6170 6171 private Intent createProcessTextIntent() { 6172 return new Intent() 6173 .setAction(Intent.ACTION_PROCESS_TEXT) 6174 .setType("text/plain"); 6175 } 6176 6177 private CharSequence getLabel(ResolveInfo resolveInfo) { 6178 return resolveInfo.loadLabel(mPackageManager); 6179 } 6180 } 6181} 6182