Editor.java revision a18447dd4bda74c6500c4705b9eb54af63deaf3b
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.metrics.LogMaker; 45import android.os.Bundle; 46import android.os.LocaleList; 47import android.os.Parcel; 48import android.os.Parcelable; 49import android.os.ParcelableParcel; 50import android.os.SystemClock; 51import android.provider.Settings; 52import android.text.DynamicLayout; 53import android.text.Editable; 54import android.text.InputFilter; 55import android.text.InputType; 56import android.text.Layout; 57import android.text.ParcelableSpan; 58import android.text.Selection; 59import android.text.SpanWatcher; 60import android.text.Spannable; 61import android.text.SpannableStringBuilder; 62import android.text.Spanned; 63import android.text.StaticLayout; 64import android.text.TextUtils; 65import android.text.method.KeyListener; 66import android.text.method.MetaKeyKeyListener; 67import android.text.method.MovementMethod; 68import android.text.method.WordIterator; 69import android.text.style.EasyEditSpan; 70import android.text.style.SuggestionRangeSpan; 71import android.text.style.SuggestionSpan; 72import android.text.style.TextAppearanceSpan; 73import android.text.style.URLSpan; 74import android.util.ArraySet; 75import android.util.DisplayMetrics; 76import android.util.Log; 77import android.util.SparseArray; 78import android.view.ActionMode; 79import android.view.ActionMode.Callback; 80import android.view.ContextMenu; 81import android.view.ContextThemeWrapper; 82import android.view.DisplayListCanvas; 83import android.view.DragAndDropPermissions; 84import android.view.DragEvent; 85import android.view.Gravity; 86import android.view.HapticFeedbackConstants; 87import android.view.InputDevice; 88import android.view.LayoutInflater; 89import android.view.Menu; 90import android.view.MenuItem; 91import android.view.MotionEvent; 92import android.view.RenderNode; 93import android.view.SubMenu; 94import android.view.View; 95import android.view.View.DragShadowBuilder; 96import android.view.View.OnClickListener; 97import android.view.ViewConfiguration; 98import android.view.ViewGroup; 99import android.view.ViewGroup.LayoutParams; 100import android.view.ViewTreeObserver; 101import android.view.WindowManager; 102import android.view.accessibility.AccessibilityNodeInfo; 103import android.view.inputmethod.CorrectionInfo; 104import android.view.inputmethod.CursorAnchorInfo; 105import android.view.inputmethod.EditorInfo; 106import android.view.inputmethod.ExtractedText; 107import android.view.inputmethod.ExtractedTextRequest; 108import android.view.inputmethod.InputConnection; 109import android.view.inputmethod.InputMethodManager; 110import android.view.textclassifier.TextClassification; 111import android.widget.AdapterView.OnItemClickListener; 112import android.widget.TextView.Drawables; 113import android.widget.TextView.OnEditorActionListener; 114 115import com.android.internal.annotations.VisibleForTesting; 116import com.android.internal.logging.MetricsLogger; 117import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 118import com.android.internal.util.ArrayUtils; 119import com.android.internal.util.GrowingArrayUtils; 120import com.android.internal.util.Preconditions; 121import com.android.internal.widget.EditableInputConnection; 122import com.android.internal.widget.Magnifier; 123 124import java.lang.annotation.Retention; 125import java.lang.annotation.RetentionPolicy; 126import java.text.BreakIterator; 127import java.util.ArrayList; 128import java.util.Arrays; 129import java.util.Comparator; 130import java.util.HashMap; 131import java.util.List; 132 133 134/** 135 * Helper class used by TextView to handle editable text views. 136 * 137 * @hide 138 */ 139public class Editor { 140 private static final String TAG = "Editor"; 141 private static final boolean DEBUG_UNDO = false; 142 // Specifies whether to use or not the magnifier when pressing the insertion or selection 143 // handles. 144 private static final boolean FLAG_USE_MAGNIFIER = true; 145 146 static final int BLINK = 500; 147 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 148 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 149 private static final int UNSET_X_VALUE = -1; 150 private static final int UNSET_LINE = -1; 151 // Tag used when the Editor maintains its own separate UndoManager. 152 private static final String UNDO_OWNER_TAG = "Editor"; 153 154 // Ordering constants used to place the Action Mode or context menu items in their menu. 155 private static final int MENU_ITEM_ORDER_ASSIST = 0; 156 private static final int MENU_ITEM_ORDER_UNDO = 2; 157 private static final int MENU_ITEM_ORDER_REDO = 3; 158 private static final int MENU_ITEM_ORDER_CUT = 4; 159 private static final int MENU_ITEM_ORDER_COPY = 5; 160 private static final int MENU_ITEM_ORDER_PASTE = 6; 161 private static final int MENU_ITEM_ORDER_SHARE = 7; 162 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 163 private static final int MENU_ITEM_ORDER_REPLACE = 9; 164 private static final int MENU_ITEM_ORDER_AUTOFILL = 10; 165 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 11; 166 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 167 168 private static final float MAGNIFIER_ZOOM = 1.25f; 169 @IntDef({MagnifierHandleTrigger.SELECTION_START, 170 MagnifierHandleTrigger.SELECTION_END, 171 MagnifierHandleTrigger.INSERTION}) 172 @Retention(RetentionPolicy.SOURCE) 173 private @interface MagnifierHandleTrigger { 174 int INSERTION = 0; 175 int SELECTION_START = 1; 176 int SELECTION_END = 2; 177 } 178 179 // Each Editor manages its own undo stack. 180 private final UndoManager mUndoManager = new UndoManager(); 181 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 182 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 183 boolean mAllowUndo = true; 184 185 private final MetricsLogger mMetricsLogger = new MetricsLogger(); 186 187 // Cursor Controllers. 188 private InsertionPointCursorController mInsertionPointCursorController; 189 SelectionModifierCursorController mSelectionModifierCursorController; 190 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 191 private ActionMode mTextActionMode; 192 private boolean mInsertionControllerEnabled; 193 private boolean mSelectionControllerEnabled; 194 195 private final boolean mHapticTextHandleEnabled; 196 197 private final Magnifier mMagnifier; 198 199 // Used to highlight a word when it is corrected by the IME 200 private CorrectionHighlighter mCorrectionHighlighter; 201 202 InputContentType mInputContentType; 203 InputMethodState mInputMethodState; 204 205 private static class TextRenderNode { 206 // Render node has 3 recording states: 207 // 1. Recorded operations are valid. 208 // #needsRecord() returns false, but needsToBeShifted is false. 209 // 2. Recorded operations are not valid, but just the position needed to be updated. 210 // #needsRecord() returns false, but needsToBeShifted is true. 211 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 212 // true. 213 RenderNode renderNode; 214 boolean isDirty; 215 // Becomes true when recorded operations can be reused, but the position has to be updated. 216 boolean needsToBeShifted; 217 public TextRenderNode(String name) { 218 renderNode = RenderNode.create(name, null); 219 isDirty = true; 220 needsToBeShifted = true; 221 } 222 boolean needsRecord() { 223 return isDirty || !renderNode.isValid(); 224 } 225 } 226 private TextRenderNode[] mTextRenderNodes; 227 228 boolean mFrozenWithFocus; 229 boolean mSelectionMoved; 230 boolean mTouchFocusSelected; 231 232 KeyListener mKeyListener; 233 int mInputType = EditorInfo.TYPE_NULL; 234 235 boolean mDiscardNextActionUp; 236 boolean mIgnoreActionUpEvent; 237 238 long mShowCursor; 239 private Blink mBlink; 240 241 boolean mCursorVisible = true; 242 boolean mSelectAllOnFocus; 243 boolean mTextIsSelectable; 244 245 CharSequence mError; 246 boolean mErrorWasChanged; 247 private ErrorPopup mErrorPopup; 248 249 /** 250 * This flag is set if the TextView tries to display an error before it 251 * is attached to the window (so its position is still unknown). 252 * It causes the error to be shown later, when onAttachedToWindow() 253 * is called. 254 */ 255 private boolean mShowErrorAfterAttach; 256 257 boolean mInBatchEditControllers; 258 boolean mShowSoftInputOnFocus = true; 259 private boolean mPreserveSelection; 260 private boolean mRestartActionModeOnNextRefresh; 261 262 private SelectionActionModeHelper mSelectionActionModeHelper; 263 264 boolean mIsBeingLongClicked; 265 266 private SuggestionsPopupWindow mSuggestionsPopupWindow; 267 SuggestionRangeSpan mSuggestionRangeSpan; 268 private Runnable mShowSuggestionRunnable; 269 270 Drawable mDrawableForCursor = null; 271 272 private Drawable mSelectHandleLeft; 273 private Drawable mSelectHandleRight; 274 private Drawable mSelectHandleCenter; 275 276 // Global listener that detects changes in the global position of the TextView 277 private PositionListener mPositionListener; 278 279 private float mLastDownPositionX, mLastDownPositionY; 280 private float mLastUpPositionX, mLastUpPositionY; 281 private float mContextMenuAnchorX, mContextMenuAnchorY; 282 Callback mCustomSelectionActionModeCallback; 283 Callback mCustomInsertionActionModeCallback; 284 285 // Set when this TextView gained focus with some text selected. Will start selection mode. 286 boolean mCreatedWithASelection; 287 288 // Indicates the current tap state (first tap, double tap, or triple click). 289 private int mTapState = TAP_STATE_INITIAL; 290 private long mLastTouchUpTime = 0; 291 private static final int TAP_STATE_INITIAL = 0; 292 private static final int TAP_STATE_FIRST_TAP = 1; 293 private static final int TAP_STATE_DOUBLE_TAP = 2; 294 // Only for mouse input. 295 private static final int TAP_STATE_TRIPLE_CLICK = 3; 296 297 // The button state as of the last time #onTouchEvent is called. 298 private int mLastButtonState; 299 300 private Runnable mInsertionActionModeRunnable; 301 302 // The span controller helps monitoring the changes to which the Editor needs to react: 303 // - EasyEditSpans, for which we have some UI to display on attach and on hide 304 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 305 private SpanController mSpanController; 306 307 private WordIterator mWordIterator; 308 SpellChecker mSpellChecker; 309 310 // This word iterator is set with text and used to determine word boundaries 311 // when a user is selecting text. 312 private WordIterator mWordIteratorWithText; 313 // Indicate that the text in the word iterator needs to be updated. 314 private boolean mUpdateWordIteratorText; 315 316 private Rect mTempRect; 317 318 private final TextView mTextView; 319 320 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 321 322 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 323 new CursorAnchorInfoNotifier(); 324 325 private final Runnable mShowFloatingToolbar = new Runnable() { 326 @Override 327 public void run() { 328 if (mTextActionMode != null) { 329 mTextActionMode.hide(0); // hide off. 330 } 331 } 332 }; 333 334 boolean mIsInsertionActionModeStartPending = false; 335 336 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 337 338 Editor(TextView textView) { 339 mTextView = textView; 340 // Synchronize the filter list, which places the undo input filter at the end. 341 mTextView.setFilters(mTextView.getFilters()); 342 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 343 mHapticTextHandleEnabled = mTextView.getContext().getResources().getBoolean( 344 com.android.internal.R.bool.config_enableHapticTextHandle); 345 346 mMagnifier = FLAG_USE_MAGNIFIER ? new Magnifier(mTextView) : null; 347 } 348 349 ParcelableParcel saveInstanceState() { 350 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 351 Parcel parcel = state.getParcel(); 352 mUndoManager.saveInstanceState(parcel); 353 mUndoInputFilter.saveInstanceState(parcel); 354 return state; 355 } 356 357 void restoreInstanceState(ParcelableParcel state) { 358 Parcel parcel = state.getParcel(); 359 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 360 mUndoInputFilter.restoreInstanceState(parcel); 361 // Re-associate this object as the owner of undo state. 362 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 363 } 364 365 /** 366 * Forgets all undo and redo operations for this Editor. 367 */ 368 void forgetUndoRedo() { 369 UndoOwner[] owners = { mUndoOwner }; 370 mUndoManager.forgetUndos(owners, -1 /* all */); 371 mUndoManager.forgetRedos(owners, -1 /* all */); 372 } 373 374 boolean canUndo() { 375 UndoOwner[] owners = { mUndoOwner }; 376 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 377 } 378 379 boolean canRedo() { 380 UndoOwner[] owners = { mUndoOwner }; 381 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 382 } 383 384 void undo() { 385 if (!mAllowUndo) { 386 return; 387 } 388 UndoOwner[] owners = { mUndoOwner }; 389 mUndoManager.undo(owners, 1); // Undo 1 action. 390 } 391 392 void redo() { 393 if (!mAllowUndo) { 394 return; 395 } 396 UndoOwner[] owners = { mUndoOwner }; 397 mUndoManager.redo(owners, 1); // Redo 1 action. 398 } 399 400 void replace() { 401 if (mSuggestionsPopupWindow == null) { 402 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 403 } 404 hideCursorAndSpanControllers(); 405 mSuggestionsPopupWindow.show(); 406 407 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 408 Selection.setSelection((Spannable) mTextView.getText(), middle); 409 } 410 411 void onAttachedToWindow() { 412 if (mShowErrorAfterAttach) { 413 showError(); 414 mShowErrorAfterAttach = false; 415 } 416 417 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 418 // No need to create the controller. 419 // The get method will add the listener on controller creation. 420 if (mInsertionPointCursorController != null) { 421 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 422 } 423 if (mSelectionModifierCursorController != null) { 424 mSelectionModifierCursorController.resetTouchOffsets(); 425 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 426 } 427 updateSpellCheckSpans(0, mTextView.getText().length(), 428 true /* create the spell checker if needed */); 429 430 if (mTextView.hasSelection()) { 431 refreshTextActionMode(); 432 } 433 434 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 435 resumeBlink(); 436 } 437 438 void onDetachedFromWindow() { 439 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 440 441 if (mError != null) { 442 hideError(); 443 } 444 445 suspendBlink(); 446 447 if (mInsertionPointCursorController != null) { 448 mInsertionPointCursorController.onDetached(); 449 } 450 451 if (mSelectionModifierCursorController != null) { 452 mSelectionModifierCursorController.onDetached(); 453 } 454 455 if (mShowSuggestionRunnable != null) { 456 mTextView.removeCallbacks(mShowSuggestionRunnable); 457 } 458 459 // Cancel the single tap delayed runnable. 460 if (mInsertionActionModeRunnable != null) { 461 mTextView.removeCallbacks(mInsertionActionModeRunnable); 462 } 463 464 mTextView.removeCallbacks(mShowFloatingToolbar); 465 466 discardTextDisplayLists(); 467 468 if (mSpellChecker != null) { 469 mSpellChecker.closeSession(); 470 // Forces the creation of a new SpellChecker next time this window is created. 471 // Will handle the cases where the settings has been changed in the meantime. 472 mSpellChecker = null; 473 } 474 475 hideCursorAndSpanControllers(); 476 stopTextActionModeWithPreservingSelection(); 477 } 478 479 void invalidateMagnifier() { 480 final DisplayMetrics dm = mTextView.getResources().getDisplayMetrics(); 481 invalidateMagnifier(0, 0, dm.widthPixels, dm.heightPixels); 482 } 483 484 void invalidateMagnifier(final float l, final float t, final float r, final float b) { 485 if (mMagnifier != null) { 486 mTextView.post(() -> mMagnifier.invalidate(new RectF(l, t, r, b))); 487 } 488 } 489 490 private void discardTextDisplayLists() { 491 if (mTextRenderNodes != null) { 492 for (int i = 0; i < mTextRenderNodes.length; i++) { 493 RenderNode displayList = mTextRenderNodes[i] != null 494 ? mTextRenderNodes[i].renderNode : null; 495 if (displayList != null && displayList.isValid()) { 496 displayList.discardDisplayList(); 497 } 498 } 499 } 500 } 501 502 private void showError() { 503 if (mTextView.getWindowToken() == null) { 504 mShowErrorAfterAttach = true; 505 return; 506 } 507 508 if (mErrorPopup == null) { 509 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 510 final TextView err = (TextView) inflater.inflate( 511 com.android.internal.R.layout.textview_hint, null); 512 513 final float scale = mTextView.getResources().getDisplayMetrics().density; 514 mErrorPopup = 515 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 516 mErrorPopup.setFocusable(false); 517 // The user is entering text, so the input method is needed. We 518 // don't want the popup to be displayed on top of it. 519 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 520 } 521 522 TextView tv = (TextView) mErrorPopup.getContentView(); 523 chooseSize(mErrorPopup, mError, tv); 524 tv.setText(mError); 525 526 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 527 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 528 } 529 530 public void setError(CharSequence error, Drawable icon) { 531 mError = TextUtils.stringOrSpannedString(error); 532 mErrorWasChanged = true; 533 534 if (mError == null) { 535 setErrorIcon(null); 536 if (mErrorPopup != null) { 537 if (mErrorPopup.isShowing()) { 538 mErrorPopup.dismiss(); 539 } 540 541 mErrorPopup = null; 542 } 543 mShowErrorAfterAttach = false; 544 } else { 545 setErrorIcon(icon); 546 if (mTextView.isFocused()) { 547 showError(); 548 } 549 } 550 } 551 552 private void setErrorIcon(Drawable icon) { 553 Drawables dr = mTextView.mDrawables; 554 if (dr == null) { 555 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 556 } 557 dr.setErrorDrawable(icon, mTextView); 558 559 mTextView.resetResolvedDrawables(); 560 mTextView.invalidate(); 561 mTextView.requestLayout(); 562 } 563 564 private void hideError() { 565 if (mErrorPopup != null) { 566 if (mErrorPopup.isShowing()) { 567 mErrorPopup.dismiss(); 568 } 569 } 570 571 mShowErrorAfterAttach = false; 572 } 573 574 /** 575 * Returns the X offset to make the pointy top of the error point 576 * at the middle of the error icon. 577 */ 578 private int getErrorX() { 579 /* 580 * The "25" is the distance between the point and the right edge 581 * of the background 582 */ 583 final float scale = mTextView.getResources().getDisplayMetrics().density; 584 585 final Drawables dr = mTextView.mDrawables; 586 587 final int layoutDirection = mTextView.getLayoutDirection(); 588 int errorX; 589 int offset; 590 switch (layoutDirection) { 591 default: 592 case View.LAYOUT_DIRECTION_LTR: 593 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 594 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 595 - mTextView.getPaddingRight() + offset; 596 break; 597 case View.LAYOUT_DIRECTION_RTL: 598 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 599 errorX = mTextView.getPaddingLeft() + offset; 600 break; 601 } 602 return errorX; 603 } 604 605 /** 606 * Returns the Y offset to make the pointy top of the error point 607 * at the bottom of the error icon. 608 */ 609 private int getErrorY() { 610 /* 611 * Compound, not extended, because the icon is not clipped 612 * if the text height is smaller. 613 */ 614 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 615 int vspace = mTextView.getBottom() - mTextView.getTop() 616 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 617 618 final Drawables dr = mTextView.mDrawables; 619 620 final int layoutDirection = mTextView.getLayoutDirection(); 621 int height; 622 switch (layoutDirection) { 623 default: 624 case View.LAYOUT_DIRECTION_LTR: 625 height = (dr != null ? dr.mDrawableHeightRight : 0); 626 break; 627 case View.LAYOUT_DIRECTION_RTL: 628 height = (dr != null ? dr.mDrawableHeightLeft : 0); 629 break; 630 } 631 632 int icontop = compoundPaddingTop + (vspace - height) / 2; 633 634 /* 635 * The "2" is the distance between the point and the top edge 636 * of the background. 637 */ 638 final float scale = mTextView.getResources().getDisplayMetrics().density; 639 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 640 } 641 642 void createInputContentTypeIfNeeded() { 643 if (mInputContentType == null) { 644 mInputContentType = new InputContentType(); 645 } 646 } 647 648 void createInputMethodStateIfNeeded() { 649 if (mInputMethodState == null) { 650 mInputMethodState = new InputMethodState(); 651 } 652 } 653 654 boolean isCursorVisible() { 655 // The default value is true, even when there is no associated Editor 656 return mCursorVisible && mTextView.isTextEditable(); 657 } 658 659 void prepareCursorControllers() { 660 boolean windowSupportsHandles = false; 661 662 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 663 if (params instanceof WindowManager.LayoutParams) { 664 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 665 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 666 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 667 } 668 669 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 670 mInsertionControllerEnabled = enabled && isCursorVisible(); 671 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 672 673 if (!mInsertionControllerEnabled) { 674 hideInsertionPointCursorController(); 675 if (mInsertionPointCursorController != null) { 676 mInsertionPointCursorController.onDetached(); 677 mInsertionPointCursorController = null; 678 } 679 } 680 681 if (!mSelectionControllerEnabled) { 682 stopTextActionMode(); 683 if (mSelectionModifierCursorController != null) { 684 mSelectionModifierCursorController.onDetached(); 685 mSelectionModifierCursorController = null; 686 } 687 } 688 } 689 690 void hideInsertionPointCursorController() { 691 if (mInsertionPointCursorController != null) { 692 mInsertionPointCursorController.hide(); 693 } 694 } 695 696 /** 697 * Hides the insertion and span controllers. 698 */ 699 void hideCursorAndSpanControllers() { 700 hideCursorControllers(); 701 hideSpanControllers(); 702 } 703 704 private void hideSpanControllers() { 705 if (mSpanController != null) { 706 mSpanController.hide(); 707 } 708 } 709 710 private void hideCursorControllers() { 711 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 712 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 713 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 714 // to distinguish one from the other. 715 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 716 || !mSuggestionsPopupWindow.isShowingUp())) { 717 // Should be done before hide insertion point controller since it triggers a show of it 718 mSuggestionsPopupWindow.hide(); 719 } 720 hideInsertionPointCursorController(); 721 } 722 723 /** 724 * Create new SpellCheckSpans on the modified region. 725 */ 726 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 727 // Remove spans whose adjacent characters are text not punctuation 728 mTextView.removeAdjacentSuggestionSpans(start); 729 mTextView.removeAdjacentSuggestionSpans(end); 730 731 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 732 && !(mTextView.isInExtractedMode())) { 733 if (mSpellChecker == null && createSpellChecker) { 734 mSpellChecker = new SpellChecker(mTextView); 735 } 736 if (mSpellChecker != null) { 737 mSpellChecker.spellCheck(start, end); 738 } 739 } 740 } 741 742 void onScreenStateChanged(int screenState) { 743 switch (screenState) { 744 case View.SCREEN_STATE_ON: 745 resumeBlink(); 746 break; 747 case View.SCREEN_STATE_OFF: 748 suspendBlink(); 749 break; 750 } 751 } 752 753 private void suspendBlink() { 754 if (mBlink != null) { 755 mBlink.cancel(); 756 } 757 } 758 759 private void resumeBlink() { 760 if (mBlink != null) { 761 mBlink.uncancel(); 762 makeBlink(); 763 } 764 } 765 766 void adjustInputType(boolean password, boolean passwordInputType, 767 boolean webPasswordInputType, boolean numberPasswordInputType) { 768 // mInputType has been set from inputType, possibly modified by mInputMethod. 769 // Specialize mInputType to [web]password if we have a text class and the original input 770 // type was a password. 771 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 772 if (password || passwordInputType) { 773 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 774 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 775 } 776 if (webPasswordInputType) { 777 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 778 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 779 } 780 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 781 if (numberPasswordInputType) { 782 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 783 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 784 } 785 } 786 } 787 788 private void chooseSize(@NonNull PopupWindow pop, @NonNull CharSequence text, 789 @NonNull TextView tv) { 790 final int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 791 final int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 792 793 final int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 794 com.android.internal.R.dimen.textview_error_popup_default_width); 795 final StaticLayout l = StaticLayout.Builder.obtain(text, 0, text.length(), tv.getPaint(), 796 defaultWidthInPixels) 797 .setUseLineSpacingFromFallbacks(tv.mUseFallbackLineSpacing) 798 .build(); 799 800 float max = 0; 801 for (int i = 0; i < l.getLineCount(); i++) { 802 max = Math.max(max, l.getLineWidth(i)); 803 } 804 805 /* 806 * Now set the popup size to be big enough for the text plus the border capped 807 * to DEFAULT_MAX_POPUP_WIDTH 808 */ 809 pop.setWidth(wid + (int) Math.ceil(max)); 810 pop.setHeight(ht + l.getHeight()); 811 } 812 813 void setFrame() { 814 if (mErrorPopup != null) { 815 TextView tv = (TextView) mErrorPopup.getContentView(); 816 chooseSize(mErrorPopup, mError, tv); 817 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 818 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 819 } 820 } 821 822 private int getWordStart(int offset) { 823 // FIXME - For this and similar methods we're not doing anything to check if there's 824 // a LocaleSpan in the text, this may be something we should try handling or checking for. 825 int retOffset = getWordIteratorWithText().prevBoundary(offset); 826 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 827 // On punctuation boundary or within group of punctuation, find punctuation start. 828 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 829 } else { 830 // Not on a punctuation boundary, find the word start. 831 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 832 } 833 if (retOffset == BreakIterator.DONE) { 834 return offset; 835 } 836 return retOffset; 837 } 838 839 private int getWordEnd(int offset) { 840 int retOffset = getWordIteratorWithText().nextBoundary(offset); 841 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 842 // On punctuation boundary or within group of punctuation, find punctuation end. 843 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 844 } else { 845 // Not on a punctuation boundary, find the word end. 846 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 847 } 848 if (retOffset == BreakIterator.DONE) { 849 return offset; 850 } 851 return retOffset; 852 } 853 854 private boolean needsToSelectAllToSelectWordOrParagraph() { 855 if (mTextView.hasPasswordTransformationMethod()) { 856 // Always select all on a password field. 857 // Cut/copy menu entries are not available for passwords, but being able to select all 858 // is however useful to delete or paste to replace the entire content. 859 return true; 860 } 861 862 int inputType = mTextView.getInputType(); 863 int klass = inputType & InputType.TYPE_MASK_CLASS; 864 int variation = inputType & InputType.TYPE_MASK_VARIATION; 865 866 // Specific text field types: select the entire text for these 867 if (klass == InputType.TYPE_CLASS_NUMBER 868 || klass == InputType.TYPE_CLASS_PHONE 869 || klass == InputType.TYPE_CLASS_DATETIME 870 || variation == InputType.TYPE_TEXT_VARIATION_URI 871 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 872 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 873 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 874 return true; 875 } 876 return false; 877 } 878 879 /** 880 * Adjusts selection to the word under last touch offset. Return true if the operation was 881 * successfully performed. 882 */ 883 boolean selectCurrentWord() { 884 if (!mTextView.canSelectText()) { 885 return false; 886 } 887 888 if (needsToSelectAllToSelectWordOrParagraph()) { 889 return mTextView.selectAllText(); 890 } 891 892 long lastTouchOffsets = getLastTouchOffsets(); 893 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 894 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 895 896 // Safety check in case standard touch event handling has been bypassed 897 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 898 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 899 900 int selectionStart, selectionEnd; 901 902 // If a URLSpan (web address, email, phone...) is found at that position, select it. 903 URLSpan[] urlSpans = 904 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 905 if (urlSpans.length >= 1) { 906 URLSpan urlSpan = urlSpans[0]; 907 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 908 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 909 } else { 910 // FIXME - We should check if there's a LocaleSpan in the text, this may be 911 // something we should try handling or checking for. 912 final WordIterator wordIterator = getWordIterator(); 913 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 914 915 selectionStart = wordIterator.getBeginning(minOffset); 916 selectionEnd = wordIterator.getEnd(maxOffset); 917 918 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 919 || selectionStart == selectionEnd) { 920 // Possible when the word iterator does not properly handle the text's language 921 long range = getCharClusterRange(minOffset); 922 selectionStart = TextUtils.unpackRangeStartFromLong(range); 923 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 924 } 925 } 926 927 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 928 return selectionEnd > selectionStart; 929 } 930 931 /** 932 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 933 * successfully performed. 934 */ 935 private boolean selectCurrentParagraph() { 936 if (!mTextView.canSelectText()) { 937 return false; 938 } 939 940 if (needsToSelectAllToSelectWordOrParagraph()) { 941 return mTextView.selectAllText(); 942 } 943 944 long lastTouchOffsets = getLastTouchOffsets(); 945 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 946 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 947 948 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 949 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 950 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 951 if (start < end) { 952 Selection.setSelection((Spannable) mTextView.getText(), start, end); 953 return true; 954 } 955 return false; 956 } 957 958 /** 959 * Get the minimum range of paragraphs that contains startOffset and endOffset. 960 */ 961 private long getParagraphsRange(int startOffset, int endOffset) { 962 final Layout layout = mTextView.getLayout(); 963 if (layout == null) { 964 return TextUtils.packRangeInLong(-1, -1); 965 } 966 final CharSequence text = mTextView.getText(); 967 int minLine = layout.getLineForOffset(startOffset); 968 // Search paragraph start. 969 while (minLine > 0) { 970 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 971 if (text.charAt(prevLineEndOffset - 1) == '\n') { 972 break; 973 } 974 minLine--; 975 } 976 int maxLine = layout.getLineForOffset(endOffset); 977 // Search paragraph end. 978 while (maxLine < layout.getLineCount() - 1) { 979 final int lineEndOffset = layout.getLineEnd(maxLine); 980 if (text.charAt(lineEndOffset - 1) == '\n') { 981 break; 982 } 983 maxLine++; 984 } 985 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 986 } 987 988 void onLocaleChanged() { 989 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 990 // proper new locale 991 mWordIterator = null; 992 mWordIteratorWithText = null; 993 } 994 995 public WordIterator getWordIterator() { 996 if (mWordIterator == null) { 997 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 998 } 999 return mWordIterator; 1000 } 1001 1002 private WordIterator getWordIteratorWithText() { 1003 if (mWordIteratorWithText == null) { 1004 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 1005 mUpdateWordIteratorText = true; 1006 } 1007 if (mUpdateWordIteratorText) { 1008 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 1009 // to the user's selection is needed. A possible solution would be to 1010 // copy some number N of characters near the selection and then when the 1011 // user approaches N then we'd do another copy of the next N characters. 1012 CharSequence text = mTextView.getText(); 1013 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 1014 mUpdateWordIteratorText = false; 1015 } 1016 return mWordIteratorWithText; 1017 } 1018 1019 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 1020 final Layout layout = mTextView.getLayout(); 1021 if (layout == null) return offset; 1022 return findAfterGivenOffset == layout.isRtlCharAt(offset) 1023 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 1024 } 1025 1026 private long getCharClusterRange(int offset) { 1027 final int textLength = mTextView.getText().length(); 1028 if (offset < textLength) { 1029 final int clusterEndOffset = getNextCursorOffset(offset, true); 1030 return TextUtils.packRangeInLong( 1031 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 1032 } 1033 if (offset - 1 >= 0) { 1034 final int clusterStartOffset = getNextCursorOffset(offset, false); 1035 return TextUtils.packRangeInLong(clusterStartOffset, 1036 getNextCursorOffset(clusterStartOffset, true)); 1037 } 1038 return TextUtils.packRangeInLong(offset, offset); 1039 } 1040 1041 private boolean touchPositionIsInSelection() { 1042 int selectionStart = mTextView.getSelectionStart(); 1043 int selectionEnd = mTextView.getSelectionEnd(); 1044 1045 if (selectionStart == selectionEnd) { 1046 return false; 1047 } 1048 1049 if (selectionStart > selectionEnd) { 1050 int tmp = selectionStart; 1051 selectionStart = selectionEnd; 1052 selectionEnd = tmp; 1053 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1054 } 1055 1056 SelectionModifierCursorController selectionController = getSelectionController(); 1057 int minOffset = selectionController.getMinTouchOffset(); 1058 int maxOffset = selectionController.getMaxTouchOffset(); 1059 1060 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1061 } 1062 1063 private PositionListener getPositionListener() { 1064 if (mPositionListener == null) { 1065 mPositionListener = new PositionListener(); 1066 } 1067 return mPositionListener; 1068 } 1069 1070 private interface TextViewPositionListener { 1071 public void updatePosition(int parentPositionX, int parentPositionY, 1072 boolean parentPositionChanged, boolean parentScrolled); 1073 } 1074 1075 private boolean isOffsetVisible(int offset) { 1076 Layout layout = mTextView.getLayout(); 1077 if (layout == null) return false; 1078 1079 final int line = layout.getLineForOffset(offset); 1080 final int lineBottom = layout.getLineBottom(line); 1081 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1082 return mTextView.isPositionVisible( 1083 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1084 lineBottom + mTextView.viewportToContentVerticalOffset()); 1085 } 1086 1087 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1088 * in the view. Returns false when the position is in the empty space of left/right of text. 1089 */ 1090 private boolean isPositionOnText(float x, float y) { 1091 Layout layout = mTextView.getLayout(); 1092 if (layout == null) return false; 1093 1094 final int line = mTextView.getLineAtCoordinate(y); 1095 x = mTextView.convertToLocalHorizontalCoordinate(x); 1096 1097 if (x < layout.getLineLeft(line)) return false; 1098 if (x > layout.getLineRight(line)) return false; 1099 return true; 1100 } 1101 1102 private void startDragAndDrop() { 1103 getSelectionActionModeHelper().onSelectionDrag(); 1104 1105 // TODO: Fix drag and drop in full screen extracted mode. 1106 if (mTextView.isInExtractedMode()) { 1107 return; 1108 } 1109 final int start = mTextView.getSelectionStart(); 1110 final int end = mTextView.getSelectionEnd(); 1111 CharSequence selectedText = mTextView.getTransformedText(start, end); 1112 ClipData data = ClipData.newPlainText(null, selectedText); 1113 DragLocalState localState = new DragLocalState(mTextView, start, end); 1114 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1115 View.DRAG_FLAG_GLOBAL); 1116 stopTextActionMode(); 1117 if (hasSelectionController()) { 1118 getSelectionController().resetTouchOffsets(); 1119 } 1120 } 1121 1122 public boolean performLongClick(boolean handled) { 1123 // Long press in empty space moves cursor and starts the insertion action mode. 1124 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1125 && mInsertionControllerEnabled) { 1126 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1127 mLastDownPositionY); 1128 Selection.setSelection((Spannable) mTextView.getText(), offset); 1129 getInsertionController().show(); 1130 mIsInsertionActionModeStartPending = true; 1131 handled = true; 1132 MetricsLogger.action( 1133 mTextView.getContext(), 1134 MetricsEvent.TEXT_LONGPRESS, 1135 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1136 } 1137 1138 if (!handled && mTextActionMode != null) { 1139 if (touchPositionIsInSelection()) { 1140 startDragAndDrop(); 1141 MetricsLogger.action( 1142 mTextView.getContext(), 1143 MetricsEvent.TEXT_LONGPRESS, 1144 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1145 } else { 1146 stopTextActionMode(); 1147 selectCurrentWordAndStartDrag(); 1148 MetricsLogger.action( 1149 mTextView.getContext(), 1150 MetricsEvent.TEXT_LONGPRESS, 1151 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1152 } 1153 handled = true; 1154 } 1155 1156 // Start a new selection 1157 if (!handled) { 1158 handled = selectCurrentWordAndStartDrag(); 1159 if (handled) { 1160 MetricsLogger.action( 1161 mTextView.getContext(), 1162 MetricsEvent.TEXT_LONGPRESS, 1163 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1164 } 1165 } 1166 1167 return handled; 1168 } 1169 1170 float getLastUpPositionX() { 1171 return mLastUpPositionX; 1172 } 1173 1174 float getLastUpPositionY() { 1175 return mLastUpPositionY; 1176 } 1177 1178 private long getLastTouchOffsets() { 1179 SelectionModifierCursorController selectionController = getSelectionController(); 1180 final int minOffset = selectionController.getMinTouchOffset(); 1181 final int maxOffset = selectionController.getMaxTouchOffset(); 1182 return TextUtils.packRangeInLong(minOffset, maxOffset); 1183 } 1184 1185 void onFocusChanged(boolean focused, int direction) { 1186 mShowCursor = SystemClock.uptimeMillis(); 1187 ensureEndedBatchEdit(); 1188 1189 if (focused) { 1190 int selStart = mTextView.getSelectionStart(); 1191 int selEnd = mTextView.getSelectionEnd(); 1192 1193 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1194 // mode for these, unless there was a specific selection already started. 1195 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1196 && selEnd == mTextView.getText().length(); 1197 1198 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1199 && !isFocusHighlighted; 1200 1201 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1202 // If a tap was used to give focus to that view, move cursor at tap position. 1203 // Has to be done before onTakeFocus, which can be overloaded. 1204 final int lastTapPosition = getLastTapPosition(); 1205 if (lastTapPosition >= 0) { 1206 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1207 } 1208 1209 // Note this may have to be moved out of the Editor class 1210 MovementMethod mMovement = mTextView.getMovementMethod(); 1211 if (mMovement != null) { 1212 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1213 } 1214 1215 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1216 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1217 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1218 // This special case ensure that we keep current selection in that case. 1219 // It would be better to know why the DecorView does not have focus at that time. 1220 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1221 && selStart >= 0 && selEnd >= 0) { 1222 /* 1223 * Someone intentionally set the selection, so let them 1224 * do whatever it is that they wanted to do instead of 1225 * the default on-focus behavior. We reset the selection 1226 * here instead of just skipping the onTakeFocus() call 1227 * because some movement methods do something other than 1228 * just setting the selection in theirs and we still 1229 * need to go through that path. 1230 */ 1231 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1232 } 1233 1234 if (mSelectAllOnFocus) { 1235 mTextView.selectAllText(); 1236 } 1237 1238 mTouchFocusSelected = true; 1239 } 1240 1241 mFrozenWithFocus = false; 1242 mSelectionMoved = false; 1243 1244 if (mError != null) { 1245 showError(); 1246 } 1247 1248 makeBlink(); 1249 } else { 1250 if (mError != null) { 1251 hideError(); 1252 } 1253 // Don't leave us in the middle of a batch edit. 1254 mTextView.onEndBatchEdit(); 1255 1256 if (mTextView.isInExtractedMode()) { 1257 hideCursorAndSpanControllers(); 1258 stopTextActionModeWithPreservingSelection(); 1259 } else { 1260 hideCursorAndSpanControllers(); 1261 if (mTextView.isTemporarilyDetached()) { 1262 stopTextActionModeWithPreservingSelection(); 1263 } else { 1264 stopTextActionMode(); 1265 } 1266 downgradeEasyCorrectionSpans(); 1267 } 1268 // No need to create the controller 1269 if (mSelectionModifierCursorController != null) { 1270 mSelectionModifierCursorController.resetTouchOffsets(); 1271 } 1272 } 1273 } 1274 1275 /** 1276 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1277 * span. 1278 */ 1279 private void downgradeEasyCorrectionSpans() { 1280 CharSequence text = mTextView.getText(); 1281 if (text instanceof Spannable) { 1282 Spannable spannable = (Spannable) text; 1283 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1284 spannable.length(), SuggestionSpan.class); 1285 for (int i = 0; i < suggestionSpans.length; i++) { 1286 int flags = suggestionSpans[i].getFlags(); 1287 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1288 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1289 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1290 suggestionSpans[i].setFlags(flags); 1291 } 1292 } 1293 } 1294 } 1295 1296 void sendOnTextChanged(int start, int before, int after) { 1297 getSelectionActionModeHelper().onTextChanged(start, start + before); 1298 updateSpellCheckSpans(start, start + after, false); 1299 1300 // Flip flag to indicate the word iterator needs to have the text reset. 1301 mUpdateWordIteratorText = true; 1302 1303 // Hide the controllers as soon as text is modified (typing, procedural...) 1304 // We do not hide the span controllers, since they can be added when a new text is 1305 // inserted into the text view (voice IME). 1306 hideCursorControllers(); 1307 // Reset drag accelerator. 1308 if (mSelectionModifierCursorController != null) { 1309 mSelectionModifierCursorController.resetTouchOffsets(); 1310 } 1311 stopTextActionMode(); 1312 } 1313 1314 private int getLastTapPosition() { 1315 // No need to create the controller at that point, no last tap position saved 1316 if (mSelectionModifierCursorController != null) { 1317 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1318 if (lastTapPosition >= 0) { 1319 // Safety check, should not be possible. 1320 if (lastTapPosition > mTextView.getText().length()) { 1321 lastTapPosition = mTextView.getText().length(); 1322 } 1323 return lastTapPosition; 1324 } 1325 } 1326 1327 return -1; 1328 } 1329 1330 void onWindowFocusChanged(boolean hasWindowFocus) { 1331 if (hasWindowFocus) { 1332 if (mBlink != null) { 1333 mBlink.uncancel(); 1334 makeBlink(); 1335 } 1336 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1337 refreshTextActionMode(); 1338 } 1339 } else { 1340 if (mBlink != null) { 1341 mBlink.cancel(); 1342 } 1343 if (mInputContentType != null) { 1344 mInputContentType.enterDown = false; 1345 } 1346 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1347 hideCursorAndSpanControllers(); 1348 stopTextActionModeWithPreservingSelection(); 1349 if (mSuggestionsPopupWindow != null) { 1350 mSuggestionsPopupWindow.onParentLostFocus(); 1351 } 1352 1353 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1354 ensureEndedBatchEdit(); 1355 } 1356 } 1357 1358 private void updateTapState(MotionEvent event) { 1359 final int action = event.getActionMasked(); 1360 if (action == MotionEvent.ACTION_DOWN) { 1361 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1362 // Detect double tap and triple click. 1363 if (((mTapState == TAP_STATE_FIRST_TAP) 1364 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1365 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1366 <= ViewConfiguration.getDoubleTapTimeout()) { 1367 if (mTapState == TAP_STATE_FIRST_TAP) { 1368 mTapState = TAP_STATE_DOUBLE_TAP; 1369 } else { 1370 mTapState = TAP_STATE_TRIPLE_CLICK; 1371 } 1372 } else { 1373 mTapState = TAP_STATE_FIRST_TAP; 1374 } 1375 } 1376 if (action == MotionEvent.ACTION_UP) { 1377 mLastTouchUpTime = SystemClock.uptimeMillis(); 1378 } 1379 } 1380 1381 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1382 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1383 return false; 1384 } 1385 final boolean primaryButtonStateChanged = 1386 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1387 final int action = event.getActionMasked(); 1388 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1389 && !primaryButtonStateChanged) { 1390 return true; 1391 } 1392 if (action == MotionEvent.ACTION_MOVE 1393 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1394 return true; 1395 } 1396 return false; 1397 } 1398 1399 void onTouchEvent(MotionEvent event) { 1400 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1401 mLastButtonState = event.getButtonState(); 1402 if (filterOutEvent) { 1403 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1404 mDiscardNextActionUp = true; 1405 } 1406 return; 1407 } 1408 updateTapState(event); 1409 updateFloatingToolbarVisibility(event); 1410 1411 if (hasSelectionController()) { 1412 getSelectionController().onTouchEvent(event); 1413 } 1414 1415 if (mShowSuggestionRunnable != null) { 1416 mTextView.removeCallbacks(mShowSuggestionRunnable); 1417 mShowSuggestionRunnable = null; 1418 } 1419 1420 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1421 mLastUpPositionX = event.getX(); 1422 mLastUpPositionY = event.getY(); 1423 } 1424 1425 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1426 mLastDownPositionX = event.getX(); 1427 mLastDownPositionY = event.getY(); 1428 1429 // Reset this state; it will be re-set if super.onTouchEvent 1430 // causes focus to move to the view. 1431 mTouchFocusSelected = false; 1432 mIgnoreActionUpEvent = false; 1433 } 1434 } 1435 1436 private void updateFloatingToolbarVisibility(MotionEvent event) { 1437 if (mTextActionMode != null) { 1438 switch (event.getActionMasked()) { 1439 case MotionEvent.ACTION_MOVE: 1440 hideFloatingToolbar(ActionMode.DEFAULT_HIDE_DURATION); 1441 break; 1442 case MotionEvent.ACTION_UP: // fall through 1443 case MotionEvent.ACTION_CANCEL: 1444 showFloatingToolbar(); 1445 } 1446 } 1447 } 1448 1449 void hideFloatingToolbar(int duration) { 1450 if (mTextActionMode != null) { 1451 mTextView.removeCallbacks(mShowFloatingToolbar); 1452 mTextActionMode.hide(duration); 1453 } 1454 } 1455 1456 private void showFloatingToolbar() { 1457 if (mTextActionMode != null) { 1458 // Delay "show" so it doesn't interfere with click confirmations 1459 // or double-clicks that could "dismiss" the floating toolbar. 1460 int delay = ViewConfiguration.getDoubleTapTimeout(); 1461 mTextView.postDelayed(mShowFloatingToolbar, delay); 1462 1463 // This classifies the text and most likely returns before the toolbar is actually 1464 // shown. If not, it will update the toolbar with the result when classification 1465 // returns. We would rather not wait for a long running classification process. 1466 invalidateActionModeAsync(); 1467 } 1468 } 1469 1470 public void beginBatchEdit() { 1471 mInBatchEditControllers = true; 1472 final InputMethodState ims = mInputMethodState; 1473 if (ims != null) { 1474 int nesting = ++ims.mBatchEditNesting; 1475 if (nesting == 1) { 1476 ims.mCursorChanged = false; 1477 ims.mChangedDelta = 0; 1478 if (ims.mContentChanged) { 1479 // We already have a pending change from somewhere else, 1480 // so turn this into a full update. 1481 ims.mChangedStart = 0; 1482 ims.mChangedEnd = mTextView.getText().length(); 1483 } else { 1484 ims.mChangedStart = EXTRACT_UNKNOWN; 1485 ims.mChangedEnd = EXTRACT_UNKNOWN; 1486 ims.mContentChanged = false; 1487 } 1488 mUndoInputFilter.beginBatchEdit(); 1489 mTextView.onBeginBatchEdit(); 1490 } 1491 } 1492 } 1493 1494 public void endBatchEdit() { 1495 mInBatchEditControllers = false; 1496 final InputMethodState ims = mInputMethodState; 1497 if (ims != null) { 1498 int nesting = --ims.mBatchEditNesting; 1499 if (nesting == 0) { 1500 finishBatchEdit(ims); 1501 } 1502 } 1503 } 1504 1505 void ensureEndedBatchEdit() { 1506 final InputMethodState ims = mInputMethodState; 1507 if (ims != null && ims.mBatchEditNesting != 0) { 1508 ims.mBatchEditNesting = 0; 1509 finishBatchEdit(ims); 1510 } 1511 } 1512 1513 void finishBatchEdit(final InputMethodState ims) { 1514 mTextView.onEndBatchEdit(); 1515 mUndoInputFilter.endBatchEdit(); 1516 1517 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1518 mTextView.updateAfterEdit(); 1519 reportExtractedText(); 1520 } else if (ims.mCursorChanged) { 1521 // Cheesy way to get us to report the current cursor location. 1522 mTextView.invalidateCursor(); 1523 } 1524 // sendUpdateSelection knows to avoid sending if the selection did 1525 // not actually change. 1526 sendUpdateSelection(); 1527 1528 // Show drag handles if they were blocked by batch edit mode. 1529 if (mTextActionMode != null) { 1530 final CursorController cursorController = mTextView.hasSelection() 1531 ? getSelectionController() : getInsertionController(); 1532 if (cursorController != null && !cursorController.isActive() 1533 && !cursorController.isCursorBeingModified()) { 1534 cursorController.show(); 1535 } 1536 } 1537 } 1538 1539 static final int EXTRACT_NOTHING = -2; 1540 static final int EXTRACT_UNKNOWN = -1; 1541 1542 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1543 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1544 EXTRACT_UNKNOWN, outText); 1545 } 1546 1547 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1548 int partialStartOffset, int partialEndOffset, int delta, 1549 @Nullable ExtractedText outText) { 1550 if (request == null || outText == null) { 1551 return false; 1552 } 1553 1554 final CharSequence content = mTextView.getText(); 1555 if (content == null) { 1556 return false; 1557 } 1558 1559 if (partialStartOffset != EXTRACT_NOTHING) { 1560 final int N = content.length(); 1561 if (partialStartOffset < 0) { 1562 outText.partialStartOffset = outText.partialEndOffset = -1; 1563 partialStartOffset = 0; 1564 partialEndOffset = N; 1565 } else { 1566 // Now use the delta to determine the actual amount of text 1567 // we need. 1568 partialEndOffset += delta; 1569 // Adjust offsets to ensure we contain full spans. 1570 if (content instanceof Spanned) { 1571 Spanned spanned = (Spanned) content; 1572 Object[] spans = spanned.getSpans(partialStartOffset, 1573 partialEndOffset, ParcelableSpan.class); 1574 int i = spans.length; 1575 while (i > 0) { 1576 i--; 1577 int j = spanned.getSpanStart(spans[i]); 1578 if (j < partialStartOffset) partialStartOffset = j; 1579 j = spanned.getSpanEnd(spans[i]); 1580 if (j > partialEndOffset) partialEndOffset = j; 1581 } 1582 } 1583 outText.partialStartOffset = partialStartOffset; 1584 outText.partialEndOffset = partialEndOffset - delta; 1585 1586 if (partialStartOffset > N) { 1587 partialStartOffset = N; 1588 } else if (partialStartOffset < 0) { 1589 partialStartOffset = 0; 1590 } 1591 if (partialEndOffset > N) { 1592 partialEndOffset = N; 1593 } else if (partialEndOffset < 0) { 1594 partialEndOffset = 0; 1595 } 1596 } 1597 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1598 outText.text = content.subSequence(partialStartOffset, 1599 partialEndOffset); 1600 } else { 1601 outText.text = TextUtils.substring(content, partialStartOffset, 1602 partialEndOffset); 1603 } 1604 } else { 1605 outText.partialStartOffset = 0; 1606 outText.partialEndOffset = 0; 1607 outText.text = ""; 1608 } 1609 outText.flags = 0; 1610 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1611 outText.flags |= ExtractedText.FLAG_SELECTING; 1612 } 1613 if (mTextView.isSingleLine()) { 1614 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1615 } 1616 outText.startOffset = 0; 1617 outText.selectionStart = mTextView.getSelectionStart(); 1618 outText.selectionEnd = mTextView.getSelectionEnd(); 1619 outText.hint = mTextView.getHint(); 1620 return true; 1621 } 1622 1623 boolean reportExtractedText() { 1624 final Editor.InputMethodState ims = mInputMethodState; 1625 if (ims == null) { 1626 return false; 1627 } 1628 ims.mSelectionModeChanged = false; 1629 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1630 if (req == null) { 1631 return false; 1632 } 1633 final InputMethodManager imm = InputMethodManager.peekInstance(); 1634 if (imm == null) { 1635 return false; 1636 } 1637 if (TextView.DEBUG_EXTRACT) { 1638 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1639 + ims.mChangedStart 1640 + " end=" + ims.mChangedEnd 1641 + " delta=" + ims.mChangedDelta); 1642 } 1643 if (ims.mChangedStart < 0 && !ims.mContentChanged) { 1644 ims.mChangedStart = EXTRACT_NOTHING; 1645 } 1646 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1647 ims.mChangedDelta, ims.mExtractedText)) { 1648 if (TextView.DEBUG_EXTRACT) { 1649 Log.v(TextView.LOG_TAG, 1650 "Reporting extracted start=" 1651 + ims.mExtractedText.partialStartOffset 1652 + " end=" + ims.mExtractedText.partialEndOffset 1653 + ": " + ims.mExtractedText.text); 1654 } 1655 1656 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1657 ims.mChangedStart = EXTRACT_UNKNOWN; 1658 ims.mChangedEnd = EXTRACT_UNKNOWN; 1659 ims.mChangedDelta = 0; 1660 ims.mContentChanged = false; 1661 return true; 1662 } 1663 return false; 1664 } 1665 1666 private void sendUpdateSelection() { 1667 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1668 final InputMethodManager imm = InputMethodManager.peekInstance(); 1669 if (null != imm) { 1670 final int selectionStart = mTextView.getSelectionStart(); 1671 final int selectionEnd = mTextView.getSelectionEnd(); 1672 int candStart = -1; 1673 int candEnd = -1; 1674 if (mTextView.getText() instanceof Spannable) { 1675 final Spannable sp = (Spannable) mTextView.getText(); 1676 candStart = EditableInputConnection.getComposingSpanStart(sp); 1677 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1678 } 1679 // InputMethodManager#updateSelection skips sending the message if 1680 // none of the parameters have changed since the last time we called it. 1681 imm.updateSelection(mTextView, 1682 selectionStart, selectionEnd, candStart, candEnd); 1683 } 1684 } 1685 } 1686 1687 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1688 int cursorOffsetVertical) { 1689 final int selectionStart = mTextView.getSelectionStart(); 1690 final int selectionEnd = mTextView.getSelectionEnd(); 1691 1692 final InputMethodState ims = mInputMethodState; 1693 if (ims != null && ims.mBatchEditNesting == 0) { 1694 InputMethodManager imm = InputMethodManager.peekInstance(); 1695 if (imm != null) { 1696 if (imm.isActive(mTextView)) { 1697 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1698 // We are in extract mode and the content has changed 1699 // in some way... just report complete new text to the 1700 // input method. 1701 reportExtractedText(); 1702 } 1703 } 1704 } 1705 } 1706 1707 if (mCorrectionHighlighter != null) { 1708 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1709 } 1710 1711 if (highlight != null && selectionStart == selectionEnd && mDrawableForCursor != null) { 1712 drawCursor(canvas, cursorOffsetVertical); 1713 // Rely on the drawable entirely, do not draw the cursor line. 1714 // Has to be done after the IMM related code above which relies on the highlight. 1715 highlight = null; 1716 } 1717 1718 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1719 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1720 cursorOffsetVertical); 1721 } else { 1722 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1723 } 1724 1725 if (mSelectionActionModeHelper != null) { 1726 mSelectionActionModeHelper.onDraw(canvas); 1727 } 1728 } 1729 1730 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1731 Paint highlightPaint, int cursorOffsetVertical) { 1732 final long lineRange = layout.getLineRangeForDraw(canvas); 1733 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1734 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1735 if (lastLine < 0) return; 1736 1737 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1738 firstLine, lastLine); 1739 1740 if (layout instanceof DynamicLayout) { 1741 if (mTextRenderNodes == null) { 1742 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1743 } 1744 1745 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1746 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1747 int[] blockIndices = dynamicLayout.getBlockIndices(); 1748 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1749 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1750 1751 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1752 if (blockSet != null) { 1753 for (int i = 0; i < blockSet.size(); i++) { 1754 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1755 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1756 && mTextRenderNodes[blockIndex] != null) { 1757 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1758 } 1759 } 1760 } 1761 1762 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1763 if (startBlock < 0) { 1764 startBlock = -(startBlock + 1); 1765 } 1766 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1767 1768 int startIndexToFindAvailableRenderNode = 0; 1769 int lastIndex = numberOfBlocks; 1770 1771 for (int i = startBlock; i < numberOfBlocks; i++) { 1772 final int blockIndex = blockIndices[i]; 1773 if (i >= indexFirstChangedBlock 1774 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1775 && mTextRenderNodes[blockIndex] != null) { 1776 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1777 } 1778 if (blockEndLines[i] < firstLine) { 1779 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1780 // be redrawn after they get scrolled into drawing range. 1781 continue; 1782 } 1783 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1784 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1785 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1786 if (blockEndLines[i] >= lastLine) { 1787 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1788 break; 1789 } 1790 } 1791 if (blockSet != null) { 1792 for (int i = 0; i < blockSet.size(); i++) { 1793 final int block = blockSet.valueAt(i); 1794 final int blockIndex = dynamicLayout.getBlockIndex(block); 1795 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1796 || mTextRenderNodes[blockIndex] == null 1797 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1798 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1799 layout, highlight, highlightPaint, cursorOffsetVertical, 1800 blockEndLines, blockIndices, block, numberOfBlocks, 1801 startIndexToFindAvailableRenderNode); 1802 } 1803 } 1804 } 1805 1806 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1807 } else { 1808 // Boring layout is used for empty and hint text 1809 layout.drawText(canvas, firstLine, lastLine); 1810 } 1811 } 1812 1813 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1814 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1815 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1816 int startIndexToFindAvailableRenderNode) { 1817 final int blockEndLine = blockEndLines[blockInfoIndex]; 1818 int blockIndex = blockIndices[blockInfoIndex]; 1819 1820 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1821 if (blockIsInvalid) { 1822 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1823 startIndexToFindAvailableRenderNode); 1824 // Note how dynamic layout's internal block indices get updated from Editor 1825 blockIndices[blockInfoIndex] = blockIndex; 1826 if (mTextRenderNodes[blockIndex] != null) { 1827 mTextRenderNodes[blockIndex].isDirty = true; 1828 } 1829 startIndexToFindAvailableRenderNode = blockIndex + 1; 1830 } 1831 1832 if (mTextRenderNodes[blockIndex] == null) { 1833 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1834 } 1835 1836 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1837 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1838 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1839 final int blockBeginLine = blockInfoIndex == 0 ? 1840 0 : blockEndLines[blockInfoIndex - 1] + 1; 1841 final int top = layout.getLineTop(blockBeginLine); 1842 final int bottom = layout.getLineBottom(blockEndLine); 1843 int left = 0; 1844 int right = mTextView.getWidth(); 1845 if (mTextView.getHorizontallyScrolling()) { 1846 float min = Float.MAX_VALUE; 1847 float max = Float.MIN_VALUE; 1848 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1849 min = Math.min(min, layout.getLineLeft(line)); 1850 max = Math.max(max, layout.getLineRight(line)); 1851 } 1852 left = (int) min; 1853 right = (int) (max + 0.5f); 1854 } 1855 1856 // Rebuild display list if it is invalid 1857 if (blockDisplayListIsInvalid) { 1858 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1859 right - left, bottom - top); 1860 try { 1861 // drawText is always relative to TextView's origin, this translation 1862 // brings this range of text back to the top left corner of the viewport 1863 displayListCanvas.translate(-left, -top); 1864 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1865 mTextRenderNodes[blockIndex].isDirty = false; 1866 // No need to untranslate, previous context is popped after 1867 // drawDisplayList 1868 } finally { 1869 blockDisplayList.end(displayListCanvas); 1870 // Same as drawDisplayList below, handled by our TextView's parent 1871 blockDisplayList.setClipToBounds(false); 1872 } 1873 } 1874 1875 // Valid display list only needs to update its drawing location. 1876 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1877 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1878 } 1879 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1880 return startIndexToFindAvailableRenderNode; 1881 } 1882 1883 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1884 int searchStartIndex) { 1885 int length = mTextRenderNodes.length; 1886 for (int i = searchStartIndex; i < length; i++) { 1887 boolean blockIndexFound = false; 1888 for (int j = 0; j < numberOfBlocks; j++) { 1889 if (blockIndices[j] == i) { 1890 blockIndexFound = true; 1891 break; 1892 } 1893 } 1894 if (blockIndexFound) continue; 1895 return i; 1896 } 1897 1898 // No available index found, the pool has to grow 1899 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1900 return length; 1901 } 1902 1903 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1904 final boolean translate = cursorOffsetVertical != 0; 1905 if (translate) canvas.translate(0, cursorOffsetVertical); 1906 if (mDrawableForCursor != null) { 1907 mDrawableForCursor.draw(canvas); 1908 } 1909 if (translate) canvas.translate(0, -cursorOffsetVertical); 1910 } 1911 1912 void invalidateHandlesAndActionMode() { 1913 if (mSelectionModifierCursorController != null) { 1914 mSelectionModifierCursorController.invalidateHandles(); 1915 } 1916 if (mInsertionPointCursorController != null) { 1917 mInsertionPointCursorController.invalidateHandle(); 1918 } 1919 if (mTextActionMode != null) { 1920 invalidateActionMode(); 1921 } 1922 } 1923 1924 /** 1925 * Invalidates all the sub-display lists that overlap the specified character range 1926 */ 1927 void invalidateTextDisplayList(Layout layout, int start, int end) { 1928 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1929 final int firstLine = layout.getLineForOffset(start); 1930 final int lastLine = layout.getLineForOffset(end); 1931 1932 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1933 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1934 int[] blockIndices = dynamicLayout.getBlockIndices(); 1935 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1936 1937 int i = 0; 1938 // Skip the blocks before firstLine 1939 while (i < numberOfBlocks) { 1940 if (blockEndLines[i] >= firstLine) break; 1941 i++; 1942 } 1943 1944 // Invalidate all subsequent blocks until lastLine is passed 1945 while (i < numberOfBlocks) { 1946 final int blockIndex = blockIndices[i]; 1947 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1948 mTextRenderNodes[blockIndex].isDirty = true; 1949 } 1950 if (blockEndLines[i] >= lastLine) break; 1951 i++; 1952 } 1953 } 1954 } 1955 1956 void invalidateTextDisplayList() { 1957 if (mTextRenderNodes != null) { 1958 for (int i = 0; i < mTextRenderNodes.length; i++) { 1959 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1960 } 1961 } 1962 } 1963 1964 void updateCursorPosition() { 1965 if (mTextView.mCursorDrawableRes == 0) { 1966 mDrawableForCursor = null; 1967 return; 1968 } 1969 1970 final Layout layout = mTextView.getLayout(); 1971 final int offset = mTextView.getSelectionStart(); 1972 final int line = layout.getLineForOffset(offset); 1973 final int top = layout.getLineTop(line); 1974 final int bottom = layout.getLineBottomWithoutSpacing(line); 1975 1976 final boolean clamped = layout.shouldClampCursor(line); 1977 updateCursorPosition(top, bottom, layout.getPrimaryHorizontal(offset, clamped)); 1978 } 1979 1980 void refreshTextActionMode() { 1981 if (extractedTextModeWillBeStarted()) { 1982 mRestartActionModeOnNextRefresh = false; 1983 return; 1984 } 1985 final boolean hasSelection = mTextView.hasSelection(); 1986 final SelectionModifierCursorController selectionController = getSelectionController(); 1987 final InsertionPointCursorController insertionController = getInsertionController(); 1988 if ((selectionController != null && selectionController.isCursorBeingModified()) 1989 || (insertionController != null && insertionController.isCursorBeingModified())) { 1990 // ActionMode should be managed by the currently active cursor controller. 1991 mRestartActionModeOnNextRefresh = false; 1992 return; 1993 } 1994 if (hasSelection) { 1995 hideInsertionPointCursorController(); 1996 if (mTextActionMode == null) { 1997 if (mRestartActionModeOnNextRefresh) { 1998 // To avoid distraction, newly start action mode only when selection action 1999 // mode is being restarted. 2000 startSelectionActionModeAsync(false); 2001 } 2002 } else if (selectionController == null || !selectionController.isActive()) { 2003 // Insertion action mode is active. Avoid dismissing the selection. 2004 stopTextActionModeWithPreservingSelection(); 2005 startSelectionActionModeAsync(false); 2006 } else { 2007 mTextActionMode.invalidateContentRect(); 2008 } 2009 } else { 2010 // Insertion action mode is started only when insertion controller is explicitly 2011 // activated. 2012 if (insertionController == null || !insertionController.isActive()) { 2013 stopTextActionMode(); 2014 } else if (mTextActionMode != null) { 2015 mTextActionMode.invalidateContentRect(); 2016 } 2017 } 2018 mRestartActionModeOnNextRefresh = false; 2019 } 2020 2021 /** 2022 * Start an Insertion action mode. 2023 */ 2024 void startInsertionActionMode() { 2025 if (mInsertionActionModeRunnable != null) { 2026 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2027 } 2028 if (extractedTextModeWillBeStarted()) { 2029 return; 2030 } 2031 stopTextActionMode(); 2032 2033 ActionMode.Callback actionModeCallback = 2034 new TextActionModeCallback(false /* hasSelection */); 2035 mTextActionMode = mTextView.startActionMode( 2036 actionModeCallback, ActionMode.TYPE_FLOATING); 2037 if (mTextActionMode != null && getInsertionController() != null) { 2038 getInsertionController().show(); 2039 } 2040 } 2041 2042 @NonNull 2043 TextView getTextView() { 2044 return mTextView; 2045 } 2046 2047 @Nullable 2048 ActionMode getTextActionMode() { 2049 return mTextActionMode; 2050 } 2051 2052 void setRestartActionModeOnNextRefresh(boolean value) { 2053 mRestartActionModeOnNextRefresh = value; 2054 } 2055 2056 /** 2057 * Asynchronously starts a selection action mode using the TextClassifier. 2058 */ 2059 void startSelectionActionModeAsync(boolean adjustSelection) { 2060 getSelectionActionModeHelper().startActionModeAsync(adjustSelection); 2061 } 2062 2063 /** 2064 * Asynchronously invalidates an action mode using the TextClassifier. 2065 */ 2066 void invalidateActionModeAsync() { 2067 getSelectionActionModeHelper().invalidateActionModeAsync(); 2068 } 2069 2070 /** 2071 * Synchronously invalidates an action mode without the TextClassifier. 2072 */ 2073 private void invalidateActionMode() { 2074 if (mTextActionMode != null) { 2075 mTextActionMode.invalidate(); 2076 } 2077 } 2078 2079 private SelectionActionModeHelper getSelectionActionModeHelper() { 2080 if (mSelectionActionModeHelper == null) { 2081 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2082 } 2083 return mSelectionActionModeHelper; 2084 } 2085 2086 /** 2087 * If the TextView allows text selection, selects the current word when no existing selection 2088 * was available and starts a drag. 2089 * 2090 * @return true if the drag was started. 2091 */ 2092 private boolean selectCurrentWordAndStartDrag() { 2093 if (mInsertionActionModeRunnable != null) { 2094 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2095 } 2096 if (extractedTextModeWillBeStarted()) { 2097 return false; 2098 } 2099 if (!checkField()) { 2100 return false; 2101 } 2102 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2103 // No selection and cannot select a word. 2104 return false; 2105 } 2106 stopTextActionModeWithPreservingSelection(); 2107 getSelectionController().enterDrag( 2108 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2109 return true; 2110 } 2111 2112 /** 2113 * Checks whether a selection can be performed on the current TextView. 2114 * 2115 * @return true if a selection can be performed 2116 */ 2117 boolean checkField() { 2118 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2119 Log.w(TextView.LOG_TAG, 2120 "TextView does not support text selection. Selection cancelled."); 2121 return false; 2122 } 2123 return true; 2124 } 2125 2126 boolean startSelectionActionModeInternal() { 2127 if (extractedTextModeWillBeStarted()) { 2128 return false; 2129 } 2130 if (mTextActionMode != null) { 2131 // Text action mode is already started 2132 invalidateActionMode(); 2133 return false; 2134 } 2135 2136 if (!checkField() || !mTextView.hasSelection()) { 2137 return false; 2138 } 2139 2140 ActionMode.Callback actionModeCallback = 2141 new TextActionModeCallback(true /* hasSelection */); 2142 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2143 2144 final boolean selectionStarted = mTextActionMode != null; 2145 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2146 // Show the IME to be able to replace text, except when selecting non editable text. 2147 final InputMethodManager imm = InputMethodManager.peekInstance(); 2148 if (imm != null) { 2149 imm.showSoftInput(mTextView, 0, null); 2150 } 2151 } 2152 return selectionStarted; 2153 } 2154 2155 private boolean extractedTextModeWillBeStarted() { 2156 if (!(mTextView.isInExtractedMode())) { 2157 final InputMethodManager imm = InputMethodManager.peekInstance(); 2158 return imm != null && imm.isFullscreenMode(); 2159 } 2160 return false; 2161 } 2162 2163 /** 2164 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2165 * the current cursor position or selection range. This method is consistent with the 2166 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2167 */ 2168 private boolean shouldOfferToShowSuggestions() { 2169 CharSequence text = mTextView.getText(); 2170 if (!(text instanceof Spannable)) return false; 2171 2172 final Spannable spannable = (Spannable) text; 2173 final int selectionStart = mTextView.getSelectionStart(); 2174 final int selectionEnd = mTextView.getSelectionEnd(); 2175 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2176 SuggestionSpan.class); 2177 if (suggestionSpans.length == 0) { 2178 return false; 2179 } 2180 if (selectionStart == selectionEnd) { 2181 // Spans overlap the cursor. 2182 for (int i = 0; i < suggestionSpans.length; i++) { 2183 if (suggestionSpans[i].getSuggestions().length > 0) { 2184 return true; 2185 } 2186 } 2187 return false; 2188 } 2189 int minSpanStart = mTextView.getText().length(); 2190 int maxSpanEnd = 0; 2191 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2192 int unionOfSpansCoveringSelectionStartEnd = 0; 2193 boolean hasValidSuggestions = false; 2194 for (int i = 0; i < suggestionSpans.length; i++) { 2195 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2196 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2197 minSpanStart = Math.min(minSpanStart, spanStart); 2198 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2199 if (selectionStart < spanStart || selectionStart > spanEnd) { 2200 // The span doesn't cover the current selection start point. 2201 continue; 2202 } 2203 hasValidSuggestions = 2204 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2205 unionOfSpansCoveringSelectionStartStart = 2206 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2207 unionOfSpansCoveringSelectionStartEnd = 2208 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2209 } 2210 if (!hasValidSuggestions) { 2211 return false; 2212 } 2213 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2214 // No spans cover the selection start point. 2215 return false; 2216 } 2217 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2218 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2219 // There is a span that is not covered by the union. In this case, we soouldn't offer 2220 // to show suggestions as it's confusing. 2221 return false; 2222 } 2223 return true; 2224 } 2225 2226 /** 2227 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2228 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2229 */ 2230 private boolean isCursorInsideEasyCorrectionSpan() { 2231 Spannable spannable = (Spannable) mTextView.getText(); 2232 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2233 mTextView.getSelectionEnd(), SuggestionSpan.class); 2234 for (int i = 0; i < suggestionSpans.length; i++) { 2235 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2236 return true; 2237 } 2238 } 2239 return false; 2240 } 2241 2242 void onTouchUpEvent(MotionEvent event) { 2243 if (getSelectionActionModeHelper().resetSelection( 2244 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2245 return; 2246 } 2247 2248 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2249 hideCursorAndSpanControllers(); 2250 stopTextActionMode(); 2251 CharSequence text = mTextView.getText(); 2252 if (!selectAllGotFocus && text.length() > 0) { 2253 // Move cursor 2254 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2255 Selection.setSelection((Spannable) text, offset); 2256 if (mSpellChecker != null) { 2257 // When the cursor moves, the word that was typed may need spell check 2258 mSpellChecker.onSelectionChanged(); 2259 } 2260 2261 if (!extractedTextModeWillBeStarted()) { 2262 if (isCursorInsideEasyCorrectionSpan()) { 2263 // Cancel the single tap delayed runnable. 2264 if (mInsertionActionModeRunnable != null) { 2265 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2266 } 2267 2268 mShowSuggestionRunnable = new Runnable() { 2269 public void run() { 2270 replace(); 2271 } 2272 }; 2273 // removeCallbacks is performed on every touch 2274 mTextView.postDelayed(mShowSuggestionRunnable, 2275 ViewConfiguration.getDoubleTapTimeout()); 2276 } else if (hasInsertionController()) { 2277 getInsertionController().show(); 2278 } 2279 } 2280 } 2281 } 2282 2283 protected void stopTextActionMode() { 2284 if (mTextActionMode != null) { 2285 // This will hide the mSelectionModifierCursorController 2286 mTextActionMode.finish(); 2287 } 2288 } 2289 2290 private void stopTextActionModeWithPreservingSelection() { 2291 if (mTextActionMode != null) { 2292 mRestartActionModeOnNextRefresh = true; 2293 } 2294 mPreserveSelection = true; 2295 stopTextActionMode(); 2296 mPreserveSelection = false; 2297 } 2298 2299 /** 2300 * @return True if this view supports insertion handles. 2301 */ 2302 boolean hasInsertionController() { 2303 return mInsertionControllerEnabled; 2304 } 2305 2306 /** 2307 * @return True if this view supports selection handles. 2308 */ 2309 boolean hasSelectionController() { 2310 return mSelectionControllerEnabled; 2311 } 2312 2313 private InsertionPointCursorController getInsertionController() { 2314 if (!mInsertionControllerEnabled) { 2315 return null; 2316 } 2317 2318 if (mInsertionPointCursorController == null) { 2319 mInsertionPointCursorController = new InsertionPointCursorController(); 2320 2321 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2322 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2323 } 2324 2325 return mInsertionPointCursorController; 2326 } 2327 2328 @Nullable 2329 SelectionModifierCursorController getSelectionController() { 2330 if (!mSelectionControllerEnabled) { 2331 return null; 2332 } 2333 2334 if (mSelectionModifierCursorController == null) { 2335 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2336 2337 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2338 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2339 } 2340 2341 return mSelectionModifierCursorController; 2342 } 2343 2344 @VisibleForTesting 2345 @Nullable 2346 public Drawable getCursorDrawable() { 2347 return mDrawableForCursor; 2348 } 2349 2350 private void updateCursorPosition(int top, int bottom, float horizontal) { 2351 if (mDrawableForCursor == null) { 2352 mDrawableForCursor = mTextView.getContext().getDrawable( 2353 mTextView.mCursorDrawableRes); 2354 } 2355 final int left = clampHorizontalPosition(mDrawableForCursor, horizontal); 2356 final int width = mDrawableForCursor.getIntrinsicWidth(); 2357 mDrawableForCursor.setBounds(left, top - mTempRect.top, left + width, 2358 bottom + mTempRect.bottom); 2359 } 2360 2361 /** 2362 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2363 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2364 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2365 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2366 * of the view. 2367 * 2368 * @param drawable Drawable. Can be null. 2369 * @param horizontal Horizontal position for the drawable. 2370 * @return The clamped horizontal position for the drawable. 2371 */ 2372 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2373 horizontal = Math.max(0.5f, horizontal - 0.5f); 2374 if (mTempRect == null) mTempRect = new Rect(); 2375 2376 int drawableWidth = 0; 2377 if (drawable != null) { 2378 drawable.getPadding(mTempRect); 2379 drawableWidth = drawable.getIntrinsicWidth(); 2380 } else { 2381 mTempRect.setEmpty(); 2382 } 2383 2384 int scrollX = mTextView.getScrollX(); 2385 float horizontalDiff = horizontal - scrollX; 2386 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2387 - mTextView.getCompoundPaddingRight(); 2388 2389 final int left; 2390 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2391 // at the rightmost position 2392 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2393 } else if (Math.abs(horizontalDiff) <= 1f 2394 || (TextUtils.isEmpty(mTextView.getText()) 2395 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2396 && horizontal <= 1f)) { 2397 // at the leftmost position 2398 left = scrollX - mTempRect.left; 2399 } else { 2400 left = (int) horizontal - mTempRect.left; 2401 } 2402 return left; 2403 } 2404 2405 /** 2406 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2407 * a dictionary) from the current input method, provided by it calling 2408 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2409 * implementation flashes the background of the corrected word to provide feedback to the user. 2410 * 2411 * @param info The auto correct info about the text that was corrected. 2412 */ 2413 public void onCommitCorrection(CorrectionInfo info) { 2414 if (mCorrectionHighlighter == null) { 2415 mCorrectionHighlighter = new CorrectionHighlighter(); 2416 } else { 2417 mCorrectionHighlighter.invalidate(false); 2418 } 2419 2420 mCorrectionHighlighter.highlight(info); 2421 mUndoInputFilter.freezeLastEdit(); 2422 } 2423 2424 void onScrollChanged() { 2425 if (mPositionListener != null) { 2426 mPositionListener.onScrollChanged(); 2427 } 2428 if (mTextActionMode != null) { 2429 mTextActionMode.invalidateContentRect(); 2430 } 2431 } 2432 2433 /** 2434 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2435 */ 2436 private boolean shouldBlink() { 2437 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2438 2439 final int start = mTextView.getSelectionStart(); 2440 if (start < 0) return false; 2441 2442 final int end = mTextView.getSelectionEnd(); 2443 if (end < 0) return false; 2444 2445 return start == end; 2446 } 2447 2448 void makeBlink() { 2449 if (shouldBlink()) { 2450 mShowCursor = SystemClock.uptimeMillis(); 2451 if (mBlink == null) mBlink = new Blink(); 2452 mTextView.removeCallbacks(mBlink); 2453 mTextView.postDelayed(mBlink, BLINK); 2454 } else { 2455 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2456 } 2457 } 2458 2459 private class Blink implements Runnable { 2460 private boolean mCancelled; 2461 2462 public void run() { 2463 if (mCancelled) { 2464 return; 2465 } 2466 2467 mTextView.removeCallbacks(this); 2468 2469 if (shouldBlink()) { 2470 if (mTextView.getLayout() != null) { 2471 mTextView.invalidateCursorPath(); 2472 } 2473 2474 mTextView.postDelayed(this, BLINK); 2475 } 2476 } 2477 2478 void cancel() { 2479 if (!mCancelled) { 2480 mTextView.removeCallbacks(this); 2481 mCancelled = true; 2482 } 2483 } 2484 2485 void uncancel() { 2486 mCancelled = false; 2487 } 2488 } 2489 2490 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2491 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2492 com.android.internal.R.layout.text_drag_thumbnail, null); 2493 2494 if (shadowView == null) { 2495 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2496 } 2497 2498 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2499 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2500 end = TextUtils.unpackRangeEndFromLong(range); 2501 } 2502 final CharSequence text = mTextView.getTransformedText(start, end); 2503 shadowView.setText(text); 2504 shadowView.setTextColor(mTextView.getTextColors()); 2505 2506 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2507 shadowView.setGravity(Gravity.CENTER); 2508 2509 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2510 ViewGroup.LayoutParams.WRAP_CONTENT)); 2511 2512 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2513 shadowView.measure(size, size); 2514 2515 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2516 shadowView.invalidate(); 2517 return new DragShadowBuilder(shadowView); 2518 } 2519 2520 private static class DragLocalState { 2521 public TextView sourceTextView; 2522 public int start, end; 2523 2524 public DragLocalState(TextView sourceTextView, int start, int end) { 2525 this.sourceTextView = sourceTextView; 2526 this.start = start; 2527 this.end = end; 2528 } 2529 } 2530 2531 void onDrop(DragEvent event) { 2532 SpannableStringBuilder content = new SpannableStringBuilder(); 2533 2534 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2535 if (permissions != null) { 2536 permissions.takeTransient(); 2537 } 2538 2539 try { 2540 ClipData clipData = event.getClipData(); 2541 final int itemCount = clipData.getItemCount(); 2542 for (int i = 0; i < itemCount; i++) { 2543 Item item = clipData.getItemAt(i); 2544 content.append(item.coerceToStyledText(mTextView.getContext())); 2545 } 2546 } finally { 2547 if (permissions != null) { 2548 permissions.release(); 2549 } 2550 } 2551 2552 mTextView.beginBatchEdit(); 2553 mUndoInputFilter.freezeLastEdit(); 2554 try { 2555 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2556 Object localState = event.getLocalState(); 2557 DragLocalState dragLocalState = null; 2558 if (localState instanceof DragLocalState) { 2559 dragLocalState = (DragLocalState) localState; 2560 } 2561 boolean dragDropIntoItself = dragLocalState != null 2562 && dragLocalState.sourceTextView == mTextView; 2563 2564 if (dragDropIntoItself) { 2565 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2566 // A drop inside the original selection discards the drop. 2567 return; 2568 } 2569 } 2570 2571 final int originalLength = mTextView.getText().length(); 2572 int min = offset; 2573 int max = offset; 2574 2575 Selection.setSelection((Spannable) mTextView.getText(), max); 2576 mTextView.replaceText_internal(min, max, content); 2577 2578 if (dragDropIntoItself) { 2579 int dragSourceStart = dragLocalState.start; 2580 int dragSourceEnd = dragLocalState.end; 2581 if (max <= dragSourceStart) { 2582 // Inserting text before selection has shifted positions 2583 final int shift = mTextView.getText().length() - originalLength; 2584 dragSourceStart += shift; 2585 dragSourceEnd += shift; 2586 } 2587 2588 // Delete original selection 2589 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2590 2591 // Make sure we do not leave two adjacent spaces. 2592 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2593 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2594 if (nextCharIdx > prevCharIdx + 1) { 2595 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2596 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2597 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2598 } 2599 } 2600 } 2601 } finally { 2602 mTextView.endBatchEdit(); 2603 mUndoInputFilter.freezeLastEdit(); 2604 } 2605 } 2606 2607 public void addSpanWatchers(Spannable text) { 2608 final int textLength = text.length(); 2609 2610 if (mKeyListener != null) { 2611 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2612 } 2613 2614 if (mSpanController == null) { 2615 mSpanController = new SpanController(); 2616 } 2617 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2618 } 2619 2620 void setContextMenuAnchor(float x, float y) { 2621 mContextMenuAnchorX = x; 2622 mContextMenuAnchorY = y; 2623 } 2624 2625 void onCreateContextMenu(ContextMenu menu) { 2626 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2627 || Float.isNaN(mContextMenuAnchorY)) { 2628 return; 2629 } 2630 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2631 if (offset == -1) { 2632 return; 2633 } 2634 2635 stopTextActionModeWithPreservingSelection(); 2636 if (mTextView.canSelectText()) { 2637 final boolean isOnSelection = mTextView.hasSelection() 2638 && offset >= mTextView.getSelectionStart() 2639 && offset <= mTextView.getSelectionEnd(); 2640 if (!isOnSelection) { 2641 // Right clicked position is not on the selection. Remove the selection and move the 2642 // cursor to the right clicked position. 2643 Selection.setSelection((Spannable) mTextView.getText(), offset); 2644 stopTextActionMode(); 2645 } 2646 } 2647 2648 if (shouldOfferToShowSuggestions()) { 2649 final SuggestionInfo[] suggestionInfoArray = 2650 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2651 for (int i = 0; i < suggestionInfoArray.length; i++) { 2652 suggestionInfoArray[i] = new SuggestionInfo(); 2653 } 2654 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2655 com.android.internal.R.string.replace); 2656 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2657 for (int i = 0; i < numItems; i++) { 2658 final SuggestionInfo info = suggestionInfoArray[i]; 2659 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2660 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2661 @Override 2662 public boolean onMenuItemClick(MenuItem item) { 2663 replaceWithSuggestion(info); 2664 return true; 2665 } 2666 }); 2667 } 2668 } 2669 2670 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2671 com.android.internal.R.string.undo) 2672 .setAlphabeticShortcut('z') 2673 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2674 .setEnabled(mTextView.canUndo()); 2675 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2676 com.android.internal.R.string.redo) 2677 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2678 .setEnabled(mTextView.canRedo()); 2679 2680 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2681 com.android.internal.R.string.cut) 2682 .setAlphabeticShortcut('x') 2683 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2684 .setEnabled(mTextView.canCut()); 2685 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2686 com.android.internal.R.string.copy) 2687 .setAlphabeticShortcut('c') 2688 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2689 .setEnabled(mTextView.canCopy()); 2690 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2691 com.android.internal.R.string.paste) 2692 .setAlphabeticShortcut('v') 2693 .setEnabled(mTextView.canPaste()) 2694 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2695 menu.add(Menu.NONE, TextView.ID_PASTE_AS_PLAIN_TEXT, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2696 com.android.internal.R.string.paste_as_plain_text) 2697 .setEnabled(mTextView.canPasteAsPlainText()) 2698 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2699 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2700 com.android.internal.R.string.share) 2701 .setEnabled(mTextView.canShare()) 2702 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2703 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2704 com.android.internal.R.string.selectAll) 2705 .setAlphabeticShortcut('a') 2706 .setEnabled(mTextView.canSelectAllText()) 2707 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2708 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2709 android.R.string.autofill) 2710 .setEnabled(mTextView.canRequestAutofill()) 2711 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2712 2713 mPreserveSelection = true; 2714 } 2715 2716 @Nullable 2717 private SuggestionSpan findEquivalentSuggestionSpan( 2718 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2719 final Editable editable = (Editable) mTextView.getText(); 2720 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2721 // Exactly same span is found. 2722 return suggestionSpanInfo.mSuggestionSpan; 2723 } 2724 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2725 // contents. 2726 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2727 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2728 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2729 final int start = editable.getSpanStart(suggestionSpan); 2730 if (start != suggestionSpanInfo.mSpanStart) { 2731 continue; 2732 } 2733 final int end = editable.getSpanEnd(suggestionSpan); 2734 if (end != suggestionSpanInfo.mSpanEnd) { 2735 continue; 2736 } 2737 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2738 return suggestionSpan; 2739 } 2740 } 2741 return null; 2742 } 2743 2744 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2745 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2746 suggestionInfo.mSuggestionSpanInfo); 2747 if (targetSuggestionSpan == null) { 2748 // Span has been removed 2749 return; 2750 } 2751 final Editable editable = (Editable) mTextView.getText(); 2752 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2753 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2754 if (spanStart < 0 || spanEnd <= spanStart) { 2755 // Span has been removed 2756 return; 2757 } 2758 2759 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2760 // SuggestionSpans are removed by replace: save them before 2761 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2762 SuggestionSpan.class); 2763 final int length = suggestionSpans.length; 2764 int[] suggestionSpansStarts = new int[length]; 2765 int[] suggestionSpansEnds = new int[length]; 2766 int[] suggestionSpansFlags = new int[length]; 2767 for (int i = 0; i < length; i++) { 2768 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2769 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2770 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2771 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2772 2773 // Remove potential misspelled flags 2774 int suggestionSpanFlags = suggestionSpan.getFlags(); 2775 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2776 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2777 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2778 suggestionSpan.setFlags(suggestionSpanFlags); 2779 } 2780 } 2781 2782 // Notify source IME of the suggestion pick. Do this before swapping texts. 2783 targetSuggestionSpan.notifySelection( 2784 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2785 2786 // Swap text content between actual text and Suggestion span 2787 final int suggestionStart = suggestionInfo.mSuggestionStart; 2788 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2789 final String suggestion = suggestionInfo.mText.subSequence( 2790 suggestionStart, suggestionEnd).toString(); 2791 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2792 2793 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2794 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2795 2796 // Restore previous SuggestionSpans 2797 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2798 for (int i = 0; i < length; i++) { 2799 // Only spans that include the modified region make sense after replacement 2800 // Spans partially included in the replaced region are removed, there is no 2801 // way to assign them a valid range after replacement 2802 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2803 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2804 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2805 } 2806 } 2807 // Move cursor at the end of the replaced word 2808 final int newCursorPosition = spanEnd + lengthDelta; 2809 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2810 } 2811 2812 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2813 new MenuItem.OnMenuItemClickListener() { 2814 @Override 2815 public boolean onMenuItemClick(MenuItem item) { 2816 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2817 return true; 2818 } 2819 return mTextView.onTextContextMenuItem(item.getItemId()); 2820 } 2821 }; 2822 2823 /** 2824 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2825 * pop-up should be displayed. 2826 * Also monitors {@link Selection} to call back to the attached input method. 2827 */ 2828 private class SpanController implements SpanWatcher { 2829 2830 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2831 2832 private EasyEditPopupWindow mPopupWindow; 2833 2834 private Runnable mHidePopup; 2835 2836 // This function is pure but inner classes can't have static functions 2837 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2838 final Object span) { 2839 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2840 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2841 } 2842 2843 @Override 2844 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2845 if (isNonIntermediateSelectionSpan(text, span)) { 2846 sendUpdateSelection(); 2847 } else if (span instanceof EasyEditSpan) { 2848 if (mPopupWindow == null) { 2849 mPopupWindow = new EasyEditPopupWindow(); 2850 mHidePopup = new Runnable() { 2851 @Override 2852 public void run() { 2853 hide(); 2854 } 2855 }; 2856 } 2857 2858 // Make sure there is only at most one EasyEditSpan in the text 2859 if (mPopupWindow.mEasyEditSpan != null) { 2860 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2861 } 2862 2863 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2864 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2865 @Override 2866 public void onDeleteClick(EasyEditSpan span) { 2867 Editable editable = (Editable) mTextView.getText(); 2868 int start = editable.getSpanStart(span); 2869 int end = editable.getSpanEnd(span); 2870 if (start >= 0 && end >= 0) { 2871 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2872 mTextView.deleteText_internal(start, end); 2873 } 2874 editable.removeSpan(span); 2875 } 2876 }); 2877 2878 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2879 // The window is not visible yet, ignore the text change. 2880 return; 2881 } 2882 2883 if (mTextView.getLayout() == null) { 2884 // The view has not been laid out yet, ignore the text change 2885 return; 2886 } 2887 2888 if (extractedTextModeWillBeStarted()) { 2889 // The input is in extract mode. Do not handle the easy edit in 2890 // the original TextView, as the ExtractEditText will do 2891 return; 2892 } 2893 2894 mPopupWindow.show(); 2895 mTextView.removeCallbacks(mHidePopup); 2896 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2897 } 2898 } 2899 2900 @Override 2901 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2902 if (isNonIntermediateSelectionSpan(text, span)) { 2903 sendUpdateSelection(); 2904 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2905 hide(); 2906 } 2907 } 2908 2909 @Override 2910 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2911 int newStart, int newEnd) { 2912 if (isNonIntermediateSelectionSpan(text, span)) { 2913 sendUpdateSelection(); 2914 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2915 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2916 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2917 text.removeSpan(easyEditSpan); 2918 } 2919 } 2920 2921 public void hide() { 2922 if (mPopupWindow != null) { 2923 mPopupWindow.hide(); 2924 mTextView.removeCallbacks(mHidePopup); 2925 } 2926 } 2927 2928 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2929 try { 2930 PendingIntent pendingIntent = span.getPendingIntent(); 2931 if (pendingIntent != null) { 2932 Intent intent = new Intent(); 2933 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2934 pendingIntent.send(mTextView.getContext(), 0, intent); 2935 } 2936 } catch (CanceledException e) { 2937 // This should not happen, as we should try to send the intent only once. 2938 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2939 } 2940 } 2941 } 2942 2943 /** 2944 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2945 */ 2946 private interface EasyEditDeleteListener { 2947 2948 /** 2949 * Clicks the delete pop-up. 2950 */ 2951 void onDeleteClick(EasyEditSpan span); 2952 } 2953 2954 /** 2955 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2956 * by {@link SpanController}. 2957 */ 2958 private class EasyEditPopupWindow extends PinnedPopupWindow 2959 implements OnClickListener { 2960 private static final int POPUP_TEXT_LAYOUT = 2961 com.android.internal.R.layout.text_edit_action_popup_text; 2962 private TextView mDeleteTextView; 2963 private EasyEditSpan mEasyEditSpan; 2964 private EasyEditDeleteListener mOnDeleteListener; 2965 2966 @Override 2967 protected void createPopupWindow() { 2968 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2969 com.android.internal.R.attr.textSelectHandleWindowStyle); 2970 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2971 mPopupWindow.setClippingEnabled(true); 2972 } 2973 2974 @Override 2975 protected void initContentView() { 2976 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2977 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2978 mContentView = linearLayout; 2979 mContentView.setBackgroundResource( 2980 com.android.internal.R.drawable.text_edit_side_paste_window); 2981 2982 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 2983 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2984 2985 LayoutParams wrapContent = new LayoutParams( 2986 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2987 2988 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2989 mDeleteTextView.setLayoutParams(wrapContent); 2990 mDeleteTextView.setText(com.android.internal.R.string.delete); 2991 mDeleteTextView.setOnClickListener(this); 2992 mContentView.addView(mDeleteTextView); 2993 } 2994 2995 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2996 mEasyEditSpan = easyEditSpan; 2997 } 2998 2999 private void setOnDeleteListener(EasyEditDeleteListener listener) { 3000 mOnDeleteListener = listener; 3001 } 3002 3003 @Override 3004 public void onClick(View view) { 3005 if (view == mDeleteTextView 3006 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 3007 && mOnDeleteListener != null) { 3008 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 3009 } 3010 } 3011 3012 @Override 3013 public void hide() { 3014 if (mEasyEditSpan != null) { 3015 mEasyEditSpan.setDeleteEnabled(false); 3016 } 3017 mOnDeleteListener = null; 3018 super.hide(); 3019 } 3020 3021 @Override 3022 protected int getTextOffset() { 3023 // Place the pop-up at the end of the span 3024 Editable editable = (Editable) mTextView.getText(); 3025 return editable.getSpanEnd(mEasyEditSpan); 3026 } 3027 3028 @Override 3029 protected int getVerticalLocalPosition(int line) { 3030 final Layout layout = mTextView.getLayout(); 3031 return layout.getLineBottomWithoutSpacing(line); 3032 } 3033 3034 @Override 3035 protected int clipVertically(int positionY) { 3036 // As we display the pop-up below the span, no vertical clipping is required. 3037 return positionY; 3038 } 3039 } 3040 3041 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 3042 // 3 handles 3043 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 3044 // 1 CursorAnchorInfoNotifier 3045 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 3046 private TextViewPositionListener[] mPositionListeners = 3047 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 3048 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 3049 private boolean mPositionHasChanged = true; 3050 // Absolute position of the TextView with respect to its parent window 3051 private int mPositionX, mPositionY; 3052 private int mPositionXOnScreen, mPositionYOnScreen; 3053 private int mNumberOfListeners; 3054 private boolean mScrollHasChanged; 3055 final int[] mTempCoords = new int[2]; 3056 3057 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 3058 if (mNumberOfListeners == 0) { 3059 updatePosition(); 3060 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3061 vto.addOnPreDrawListener(this); 3062 } 3063 3064 int emptySlotIndex = -1; 3065 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3066 TextViewPositionListener listener = mPositionListeners[i]; 3067 if (listener == positionListener) { 3068 return; 3069 } else if (emptySlotIndex < 0 && listener == null) { 3070 emptySlotIndex = i; 3071 } 3072 } 3073 3074 mPositionListeners[emptySlotIndex] = positionListener; 3075 mCanMove[emptySlotIndex] = canMove; 3076 mNumberOfListeners++; 3077 } 3078 3079 public void removeSubscriber(TextViewPositionListener positionListener) { 3080 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3081 if (mPositionListeners[i] == positionListener) { 3082 mPositionListeners[i] = null; 3083 mNumberOfListeners--; 3084 break; 3085 } 3086 } 3087 3088 if (mNumberOfListeners == 0) { 3089 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3090 vto.removeOnPreDrawListener(this); 3091 } 3092 } 3093 3094 public int getPositionX() { 3095 return mPositionX; 3096 } 3097 3098 public int getPositionY() { 3099 return mPositionY; 3100 } 3101 3102 public int getPositionXOnScreen() { 3103 return mPositionXOnScreen; 3104 } 3105 3106 public int getPositionYOnScreen() { 3107 return mPositionYOnScreen; 3108 } 3109 3110 @Override 3111 public boolean onPreDraw() { 3112 updatePosition(); 3113 3114 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3115 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3116 TextViewPositionListener positionListener = mPositionListeners[i]; 3117 if (positionListener != null) { 3118 positionListener.updatePosition(mPositionX, mPositionY, 3119 mPositionHasChanged, mScrollHasChanged); 3120 } 3121 } 3122 } 3123 3124 mScrollHasChanged = false; 3125 return true; 3126 } 3127 3128 private void updatePosition() { 3129 mTextView.getLocationInWindow(mTempCoords); 3130 3131 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3132 3133 mPositionX = mTempCoords[0]; 3134 mPositionY = mTempCoords[1]; 3135 3136 mTextView.getLocationOnScreen(mTempCoords); 3137 3138 mPositionXOnScreen = mTempCoords[0]; 3139 mPositionYOnScreen = mTempCoords[1]; 3140 } 3141 3142 public void onScrollChanged() { 3143 mScrollHasChanged = true; 3144 } 3145 } 3146 3147 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3148 protected PopupWindow mPopupWindow; 3149 protected ViewGroup mContentView; 3150 int mPositionX, mPositionY; 3151 int mClippingLimitLeft, mClippingLimitRight; 3152 3153 protected abstract void createPopupWindow(); 3154 protected abstract void initContentView(); 3155 protected abstract int getTextOffset(); 3156 protected abstract int getVerticalLocalPosition(int line); 3157 protected abstract int clipVertically(int positionY); 3158 protected void setUp() { 3159 } 3160 3161 public PinnedPopupWindow() { 3162 // Due to calling subclass methods in base constructor, subclass constructor is not 3163 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3164 // a chance to initialize subclasses, call setUp() method here. 3165 // TODO: It is good to extract non trivial initialization code from constructor. 3166 setUp(); 3167 3168 createPopupWindow(); 3169 3170 mPopupWindow.setWindowLayoutType( 3171 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3172 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3173 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3174 3175 initContentView(); 3176 3177 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3178 ViewGroup.LayoutParams.WRAP_CONTENT); 3179 mContentView.setLayoutParams(wrapContent); 3180 3181 mPopupWindow.setContentView(mContentView); 3182 } 3183 3184 public void show() { 3185 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3186 3187 computeLocalPosition(); 3188 3189 final PositionListener positionListener = getPositionListener(); 3190 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3191 } 3192 3193 protected void measureContent() { 3194 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3195 mContentView.measure( 3196 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3197 View.MeasureSpec.AT_MOST), 3198 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3199 View.MeasureSpec.AT_MOST)); 3200 } 3201 3202 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3203 * positioned according to viewportToContentHorizontalOffset. 3204 * 3205 * This method assumes that mContentView has properly been measured from its content. */ 3206 private void computeLocalPosition() { 3207 measureContent(); 3208 final int width = mContentView.getMeasuredWidth(); 3209 final int offset = getTextOffset(); 3210 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3211 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3212 3213 final int line = mTextView.getLayout().getLineForOffset(offset); 3214 mPositionY = getVerticalLocalPosition(line); 3215 mPositionY += mTextView.viewportToContentVerticalOffset(); 3216 } 3217 3218 private void updatePosition(int parentPositionX, int parentPositionY) { 3219 int positionX = parentPositionX + mPositionX; 3220 int positionY = parentPositionY + mPositionY; 3221 3222 positionY = clipVertically(positionY); 3223 3224 // Horizontal clipping 3225 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3226 final int width = mContentView.getMeasuredWidth(); 3227 positionX = Math.min( 3228 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3229 positionX = Math.max(-mClippingLimitLeft, positionX); 3230 3231 if (isShowing()) { 3232 mPopupWindow.update(positionX, positionY, -1, -1); 3233 } else { 3234 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3235 positionX, positionY); 3236 } 3237 } 3238 3239 public void hide() { 3240 if (!isShowing()) { 3241 return; 3242 } 3243 mPopupWindow.dismiss(); 3244 getPositionListener().removeSubscriber(this); 3245 } 3246 3247 @Override 3248 public void updatePosition(int parentPositionX, int parentPositionY, 3249 boolean parentPositionChanged, boolean parentScrolled) { 3250 // Either parentPositionChanged or parentScrolled is true, check if still visible 3251 if (isShowing() && isOffsetVisible(getTextOffset())) { 3252 if (parentScrolled) computeLocalPosition(); 3253 updatePosition(parentPositionX, parentPositionY); 3254 } else { 3255 hide(); 3256 } 3257 } 3258 3259 public boolean isShowing() { 3260 return mPopupWindow.isShowing(); 3261 } 3262 } 3263 3264 private static final class SuggestionInfo { 3265 // Range of actual suggestion within mText 3266 int mSuggestionStart, mSuggestionEnd; 3267 3268 // The SuggestionSpan that this TextView represents 3269 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3270 3271 // The index of this suggestion inside suggestionSpan 3272 int mSuggestionIndex; 3273 3274 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3275 3276 void clear() { 3277 mSuggestionSpanInfo.clear(); 3278 mText.clear(); 3279 } 3280 3281 // Utility method to set attributes about a SuggestionSpan. 3282 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3283 mSuggestionSpanInfo.mSuggestionSpan = span; 3284 mSuggestionSpanInfo.mSpanStart = spanStart; 3285 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3286 } 3287 } 3288 3289 private static final class SuggestionSpanInfo { 3290 // The SuggestionSpan; 3291 @Nullable 3292 SuggestionSpan mSuggestionSpan; 3293 3294 // The SuggestionSpan start position 3295 int mSpanStart; 3296 3297 // The SuggestionSpan end position 3298 int mSpanEnd; 3299 3300 void clear() { 3301 mSuggestionSpan = null; 3302 } 3303 } 3304 3305 private class SuggestionHelper { 3306 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3307 new SuggestionSpanComparator(); 3308 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3309 new HashMap<SuggestionSpan, Integer>(); 3310 3311 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3312 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3313 final int flag1 = span1.getFlags(); 3314 final int flag2 = span2.getFlags(); 3315 if (flag1 != flag2) { 3316 // The order here should match what is used in updateDrawState 3317 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3318 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3319 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3320 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3321 if (easy1 && !misspelled1) return -1; 3322 if (easy2 && !misspelled2) return 1; 3323 if (misspelled1) return -1; 3324 if (misspelled2) return 1; 3325 } 3326 3327 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3328 } 3329 } 3330 3331 /** 3332 * Returns the suggestion spans that cover the current cursor position. The suggestion 3333 * spans are sorted according to the length of text that they are attached to. 3334 */ 3335 private SuggestionSpan[] getSortedSuggestionSpans() { 3336 int pos = mTextView.getSelectionStart(); 3337 Spannable spannable = (Spannable) mTextView.getText(); 3338 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3339 3340 mSpansLengths.clear(); 3341 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3342 int start = spannable.getSpanStart(suggestionSpan); 3343 int end = spannable.getSpanEnd(suggestionSpan); 3344 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3345 } 3346 3347 // The suggestions are sorted according to their types (easy correction first, then 3348 // misspelled) and to the length of the text that they cover (shorter first). 3349 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3350 mSpansLengths.clear(); 3351 3352 return suggestionSpans; 3353 } 3354 3355 /** 3356 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3357 * position. 3358 * 3359 * @param suggestionInfos SuggestionInfo array the results will be set. 3360 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3361 * @return the number of suggestions actually fetched. 3362 */ 3363 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3364 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3365 final Spannable spannable = (Spannable) mTextView.getText(); 3366 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3367 final int nbSpans = suggestionSpans.length; 3368 if (nbSpans == 0) return 0; 3369 3370 int numberOfSuggestions = 0; 3371 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3372 final int spanStart = spannable.getSpanStart(suggestionSpan); 3373 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3374 3375 if (misspelledSpanInfo != null 3376 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3377 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3378 misspelledSpanInfo.mSpanStart = spanStart; 3379 misspelledSpanInfo.mSpanEnd = spanEnd; 3380 } 3381 3382 final String[] suggestions = suggestionSpan.getSuggestions(); 3383 final int nbSuggestions = suggestions.length; 3384 suggestionLoop: 3385 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3386 final String suggestion = suggestions[suggestionIndex]; 3387 for (int i = 0; i < numberOfSuggestions; i++) { 3388 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3389 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3390 final int otherSpanStart = 3391 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3392 final int otherSpanEnd = 3393 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3394 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3395 continue suggestionLoop; 3396 } 3397 } 3398 } 3399 3400 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3401 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3402 suggestionInfo.mSuggestionIndex = suggestionIndex; 3403 suggestionInfo.mSuggestionStart = 0; 3404 suggestionInfo.mSuggestionEnd = suggestion.length(); 3405 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3406 numberOfSuggestions++; 3407 if (numberOfSuggestions >= suggestionInfos.length) { 3408 return numberOfSuggestions; 3409 } 3410 } 3411 } 3412 return numberOfSuggestions; 3413 } 3414 } 3415 3416 @VisibleForTesting 3417 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3418 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3419 3420 // Key of intent extras for inserting new word into user dictionary. 3421 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3422 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3423 3424 private SuggestionInfo[] mSuggestionInfos; 3425 private int mNumberOfSuggestions; 3426 private boolean mCursorWasVisibleBeforeSuggestions; 3427 private boolean mIsShowingUp = false; 3428 private SuggestionAdapter mSuggestionsAdapter; 3429 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3430 private TextView mAddToDictionaryButton; 3431 private TextView mDeleteButton; 3432 private ListView mSuggestionListView; 3433 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3434 private int mContainerMarginWidth; 3435 private int mContainerMarginTop; 3436 private LinearLayout mContainerView; 3437 private Context mContext; // TODO: Make mContext final. 3438 3439 private class CustomPopupWindow extends PopupWindow { 3440 3441 @Override 3442 public void dismiss() { 3443 if (!isShowing()) { 3444 return; 3445 } 3446 super.dismiss(); 3447 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3448 3449 // Safe cast since show() checks that mTextView.getText() is an Editable 3450 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3451 3452 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3453 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3454 getInsertionController().show(); 3455 } 3456 } 3457 } 3458 3459 public SuggestionsPopupWindow() { 3460 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3461 } 3462 3463 @Override 3464 protected void setUp() { 3465 mContext = applyDefaultTheme(mTextView.getContext()); 3466 mHighlightSpan = new TextAppearanceSpan(mContext, 3467 mTextView.mTextEditSuggestionHighlightStyle); 3468 } 3469 3470 private Context applyDefaultTheme(Context originalContext) { 3471 TypedArray a = originalContext.obtainStyledAttributes( 3472 new int[]{com.android.internal.R.attr.isLightTheme}); 3473 boolean isLightTheme = a.getBoolean(0, true); 3474 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3475 : R.style.ThemeOverlay_Material_Dark; 3476 a.recycle(); 3477 return new ContextThemeWrapper(originalContext, themeId); 3478 } 3479 3480 @Override 3481 protected void createPopupWindow() { 3482 mPopupWindow = new CustomPopupWindow(); 3483 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3484 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3485 mPopupWindow.setFocusable(true); 3486 mPopupWindow.setClippingEnabled(false); 3487 } 3488 3489 @Override 3490 protected void initContentView() { 3491 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3492 Context.LAYOUT_INFLATER_SERVICE); 3493 mContentView = (ViewGroup) inflater.inflate( 3494 mTextView.mTextEditSuggestionContainerLayout, null); 3495 3496 mContainerView = (LinearLayout) mContentView.findViewById( 3497 com.android.internal.R.id.suggestionWindowContainer); 3498 ViewGroup.MarginLayoutParams lp = 3499 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3500 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3501 mContainerMarginTop = lp.topMargin; 3502 mClippingLimitLeft = lp.leftMargin; 3503 mClippingLimitRight = lp.rightMargin; 3504 3505 mSuggestionListView = (ListView) mContentView.findViewById( 3506 com.android.internal.R.id.suggestionContainer); 3507 3508 mSuggestionsAdapter = new SuggestionAdapter(); 3509 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3510 mSuggestionListView.setOnItemClickListener(this); 3511 3512 // Inflate the suggestion items once and for all. 3513 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3514 for (int i = 0; i < mSuggestionInfos.length; i++) { 3515 mSuggestionInfos[i] = new SuggestionInfo(); 3516 } 3517 3518 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3519 com.android.internal.R.id.addToDictionaryButton); 3520 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3521 public void onClick(View v) { 3522 final SuggestionSpan misspelledSpan = 3523 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3524 if (misspelledSpan == null) { 3525 // Span has been removed. 3526 return; 3527 } 3528 final Editable editable = (Editable) mTextView.getText(); 3529 final int spanStart = editable.getSpanStart(misspelledSpan); 3530 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3531 if (spanStart < 0 || spanEnd <= spanStart) { 3532 return; 3533 } 3534 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3535 3536 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3537 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3538 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3539 mTextView.getTextServicesLocale().toString()); 3540 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3541 mTextView.getContext().startActivity(intent); 3542 // There is no way to know if the word was indeed added. Re-check. 3543 // TODO The ExtractEditText should remove the span in the original text instead 3544 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3545 Selection.setSelection(editable, spanEnd); 3546 updateSpellCheckSpans(spanStart, spanEnd, false); 3547 hideWithCleanUp(); 3548 } 3549 }); 3550 3551 mDeleteButton = (TextView) mContentView.findViewById( 3552 com.android.internal.R.id.deleteButton); 3553 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3554 public void onClick(View v) { 3555 final Editable editable = (Editable) mTextView.getText(); 3556 3557 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3558 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3559 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3560 // Do not leave two adjacent spaces after deletion, or one at beginning of 3561 // text 3562 if (spanUnionEnd < editable.length() 3563 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3564 && (spanUnionStart == 0 3565 || Character.isSpaceChar( 3566 editable.charAt(spanUnionStart - 1)))) { 3567 spanUnionEnd = spanUnionEnd + 1; 3568 } 3569 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3570 } 3571 hideWithCleanUp(); 3572 } 3573 }); 3574 3575 } 3576 3577 public boolean isShowingUp() { 3578 return mIsShowingUp; 3579 } 3580 3581 public void onParentLostFocus() { 3582 mIsShowingUp = false; 3583 } 3584 3585 private class SuggestionAdapter extends BaseAdapter { 3586 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3587 Context.LAYOUT_INFLATER_SERVICE); 3588 3589 @Override 3590 public int getCount() { 3591 return mNumberOfSuggestions; 3592 } 3593 3594 @Override 3595 public Object getItem(int position) { 3596 return mSuggestionInfos[position]; 3597 } 3598 3599 @Override 3600 public long getItemId(int position) { 3601 return position; 3602 } 3603 3604 @Override 3605 public View getView(int position, View convertView, ViewGroup parent) { 3606 TextView textView = (TextView) convertView; 3607 3608 if (textView == null) { 3609 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3610 parent, false); 3611 } 3612 3613 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3614 textView.setText(suggestionInfo.mText); 3615 return textView; 3616 } 3617 } 3618 3619 @VisibleForTesting 3620 public ViewGroup getContentViewForTesting() { 3621 return mContentView; 3622 } 3623 3624 @Override 3625 public void show() { 3626 if (!(mTextView.getText() instanceof Editable)) return; 3627 if (extractedTextModeWillBeStarted()) { 3628 return; 3629 } 3630 3631 if (updateSuggestions()) { 3632 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3633 mTextView.setCursorVisible(false); 3634 mIsShowingUp = true; 3635 super.show(); 3636 } 3637 } 3638 3639 @Override 3640 protected void measureContent() { 3641 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3642 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3643 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3644 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3645 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3646 3647 int width = 0; 3648 View view = null; 3649 for (int i = 0; i < mNumberOfSuggestions; i++) { 3650 view = mSuggestionsAdapter.getView(i, view, mContentView); 3651 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3652 view.measure(horizontalMeasure, verticalMeasure); 3653 width = Math.max(width, view.getMeasuredWidth()); 3654 } 3655 3656 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3657 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3658 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3659 } 3660 3661 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3662 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3663 3664 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3665 + mContainerMarginWidth; 3666 3667 // Enforce the width based on actual text widths 3668 mContentView.measure( 3669 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3670 verticalMeasure); 3671 3672 Drawable popupBackground = mPopupWindow.getBackground(); 3673 if (popupBackground != null) { 3674 if (mTempRect == null) mTempRect = new Rect(); 3675 popupBackground.getPadding(mTempRect); 3676 width += mTempRect.left + mTempRect.right; 3677 } 3678 mPopupWindow.setWidth(width); 3679 } 3680 3681 @Override 3682 protected int getTextOffset() { 3683 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3684 } 3685 3686 @Override 3687 protected int getVerticalLocalPosition(int line) { 3688 final Layout layout = mTextView.getLayout(); 3689 return layout.getLineBottomWithoutSpacing(line) - mContainerMarginTop; 3690 } 3691 3692 @Override 3693 protected int clipVertically(int positionY) { 3694 final int height = mContentView.getMeasuredHeight(); 3695 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3696 return Math.min(positionY, displayMetrics.heightPixels - height); 3697 } 3698 3699 private void hideWithCleanUp() { 3700 for (final SuggestionInfo info : mSuggestionInfos) { 3701 info.clear(); 3702 } 3703 mMisspelledSpanInfo.clear(); 3704 hide(); 3705 } 3706 3707 private boolean updateSuggestions() { 3708 Spannable spannable = (Spannable) mTextView.getText(); 3709 mNumberOfSuggestions = 3710 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3711 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3712 return false; 3713 } 3714 3715 int spanUnionStart = mTextView.getText().length(); 3716 int spanUnionEnd = 0; 3717 3718 for (int i = 0; i < mNumberOfSuggestions; i++) { 3719 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3720 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3721 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3722 } 3723 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3724 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3725 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3726 } 3727 3728 for (int i = 0; i < mNumberOfSuggestions; i++) { 3729 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3730 } 3731 3732 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3733 int addToDictionaryButtonVisibility = View.GONE; 3734 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3735 if (mMisspelledSpanInfo.mSpanStart >= 0 3736 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3737 addToDictionaryButtonVisibility = View.VISIBLE; 3738 } 3739 } 3740 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3741 3742 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3743 final int underlineColor; 3744 if (mNumberOfSuggestions != 0) { 3745 underlineColor = 3746 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3747 } else { 3748 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3749 } 3750 3751 if (underlineColor == 0) { 3752 // Fallback on the default highlight color when the first span does not provide one 3753 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3754 } else { 3755 final float BACKGROUND_TRANSPARENCY = 0.4f; 3756 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3757 mSuggestionRangeSpan.setBackgroundColor( 3758 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3759 } 3760 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3761 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3762 3763 mSuggestionsAdapter.notifyDataSetChanged(); 3764 return true; 3765 } 3766 3767 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3768 int unionEnd) { 3769 final Spannable text = (Spannable) mTextView.getText(); 3770 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3771 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3772 3773 // Adjust the start/end of the suggestion span 3774 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3775 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3776 + suggestionInfo.mText.length(); 3777 3778 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3779 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3780 3781 // Add the text before and after the span. 3782 final String textAsString = text.toString(); 3783 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3784 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3785 } 3786 3787 @Override 3788 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3789 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3790 replaceWithSuggestion(suggestionInfo); 3791 hideWithCleanUp(); 3792 } 3793 } 3794 3795 /** 3796 * An ActionMode Callback class that is used to provide actions while in text insertion or 3797 * selection mode. 3798 * 3799 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3800 * actions, depending on which of these this TextView supports and the current selection. 3801 */ 3802 private class TextActionModeCallback extends ActionMode.Callback2 { 3803 private final Path mSelectionPath = new Path(); 3804 private final RectF mSelectionBounds = new RectF(); 3805 private final boolean mHasSelection; 3806 private final int mHandleHeight; 3807 3808 public TextActionModeCallback(boolean hasSelection) { 3809 mHasSelection = hasSelection; 3810 if (mHasSelection) { 3811 SelectionModifierCursorController selectionController = getSelectionController(); 3812 if (selectionController.mStartHandle == null) { 3813 // As these are for initializing selectionController, hide() must be called. 3814 selectionController.initDrawables(); 3815 selectionController.initHandles(); 3816 selectionController.hide(); 3817 } 3818 mHandleHeight = Math.max( 3819 mSelectHandleLeft.getMinimumHeight(), 3820 mSelectHandleRight.getMinimumHeight()); 3821 } else { 3822 InsertionPointCursorController insertionController = getInsertionController(); 3823 if (insertionController != null) { 3824 insertionController.getHandle(); 3825 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3826 } else { 3827 mHandleHeight = 0; 3828 } 3829 } 3830 } 3831 3832 @Override 3833 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3834 mode.setTitle(null); 3835 mode.setSubtitle(null); 3836 mode.setTitleOptionalHint(true); 3837 populateMenuWithItems(menu); 3838 3839 Callback customCallback = getCustomCallback(); 3840 if (customCallback != null) { 3841 if (!customCallback.onCreateActionMode(mode, menu)) { 3842 // The custom mode can choose to cancel the action mode, dismiss selection. 3843 Selection.setSelection((Spannable) mTextView.getText(), 3844 mTextView.getSelectionEnd()); 3845 return false; 3846 } 3847 } 3848 3849 if (mTextView.canProcessText()) { 3850 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3851 } 3852 3853 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3854 if (mHasSelection && !mTextView.hasTransientState()) { 3855 mTextView.setHasTransientState(true); 3856 } 3857 return true; 3858 } else { 3859 return false; 3860 } 3861 } 3862 3863 private Callback getCustomCallback() { 3864 return mHasSelection 3865 ? mCustomSelectionActionModeCallback 3866 : mCustomInsertionActionModeCallback; 3867 } 3868 3869 private void populateMenuWithItems(Menu menu) { 3870 if (mTextView.canCut()) { 3871 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3872 com.android.internal.R.string.cut) 3873 .setAlphabeticShortcut('x') 3874 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3875 } 3876 3877 if (mTextView.canCopy()) { 3878 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3879 com.android.internal.R.string.copy) 3880 .setAlphabeticShortcut('c') 3881 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3882 } 3883 3884 if (mTextView.canPaste()) { 3885 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3886 com.android.internal.R.string.paste) 3887 .setAlphabeticShortcut('v') 3888 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3889 } 3890 3891 if (mTextView.canShare()) { 3892 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3893 com.android.internal.R.string.share) 3894 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3895 } 3896 3897 if (mTextView.canRequestAutofill()) { 3898 final String selected = mTextView.getSelectedText(); 3899 if (selected == null || selected.isEmpty()) { 3900 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3901 com.android.internal.R.string.autofill) 3902 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 3903 } 3904 } 3905 3906 if (mTextView.canPasteAsPlainText()) { 3907 menu.add( 3908 Menu.NONE, 3909 TextView.ID_PASTE_AS_PLAIN_TEXT, 3910 MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 3911 com.android.internal.R.string.paste_as_plain_text) 3912 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3913 } 3914 3915 updateSelectAllItem(menu); 3916 updateReplaceItem(menu); 3917 updateAssistMenuItem(menu); 3918 } 3919 3920 @Override 3921 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3922 updateSelectAllItem(menu); 3923 updateReplaceItem(menu); 3924 updateAssistMenuItem(menu); 3925 3926 Callback customCallback = getCustomCallback(); 3927 if (customCallback != null) { 3928 return customCallback.onPrepareActionMode(mode, menu); 3929 } 3930 return true; 3931 } 3932 3933 private void updateSelectAllItem(Menu menu) { 3934 boolean canSelectAll = mTextView.canSelectAllText(); 3935 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3936 if (canSelectAll && !selectAllItemExists) { 3937 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3938 com.android.internal.R.string.selectAll) 3939 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3940 } else if (!canSelectAll && selectAllItemExists) { 3941 menu.removeItem(TextView.ID_SELECT_ALL); 3942 } 3943 } 3944 3945 private void updateReplaceItem(Menu menu) { 3946 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3947 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3948 if (canReplace && !replaceItemExists) { 3949 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3950 com.android.internal.R.string.replace) 3951 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3952 } else if (!canReplace && replaceItemExists) { 3953 menu.removeItem(TextView.ID_REPLACE); 3954 } 3955 } 3956 3957 private void updateAssistMenuItem(Menu menu) { 3958 menu.removeItem(TextView.ID_ASSIST); 3959 final TextClassification textClassification = 3960 getSelectionActionModeHelper().getTextClassification(); 3961 if (canAssist()) { 3962 menu.add(TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, 3963 textClassification.getLabel()) 3964 .setIcon(textClassification.getIcon()) 3965 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3966 mMetricsLogger.write( 3967 new LogMaker(MetricsEvent.TEXT_SELECTION_MENU_ITEM_ASSIST) 3968 .setType(MetricsEvent.TYPE_OPEN) 3969 .setSubtype(textClassification.getLogType())); 3970 } 3971 } 3972 3973 private boolean canAssist() { 3974 final TextClassification textClassification = 3975 getSelectionActionModeHelper().getTextClassification(); 3976 return mTextView.isDeviceProvisioned() 3977 && textClassification != null 3978 && (textClassification.getIcon() != null 3979 || !TextUtils.isEmpty(textClassification.getLabel())) 3980 && (textClassification.getOnClickListener() != null 3981 || (textClassification.getIntent() != null 3982 && mTextView.getContext().canStartActivityForResult())); 3983 } 3984 3985 @Override 3986 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3987 getSelectionActionModeHelper().onSelectionAction(item.getItemId()); 3988 3989 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3990 return true; 3991 } 3992 Callback customCallback = getCustomCallback(); 3993 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3994 return true; 3995 } 3996 final TextClassification textClassification = 3997 getSelectionActionModeHelper().getTextClassification(); 3998 if (TextView.ID_ASSIST == item.getItemId() && textClassification != null) { 3999 final OnClickListener onClickListener = 4000 textClassification.getOnClickListener(); 4001 if (onClickListener != null) { 4002 onClickListener.onClick(mTextView); 4003 } else { 4004 final Intent intent = textClassification.getIntent(); 4005 if (intent != null) { 4006 TextClassification.createStartActivityOnClickListener( 4007 mTextView.getContext(), intent) 4008 .onClick(mTextView); 4009 } 4010 } 4011 mMetricsLogger.action( 4012 MetricsEvent.ACTION_TEXT_SELECTION_MENU_ITEM_ASSIST, 4013 textClassification.getLogType()); 4014 stopTextActionMode(); 4015 return true; 4016 } 4017 return mTextView.onTextContextMenuItem(item.getItemId()); 4018 } 4019 4020 @Override 4021 public void onDestroyActionMode(ActionMode mode) { 4022 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 4023 getSelectionActionModeHelper().onDestroyActionMode(); 4024 mTextActionMode = null; 4025 Callback customCallback = getCustomCallback(); 4026 if (customCallback != null) { 4027 customCallback.onDestroyActionMode(mode); 4028 } 4029 4030 if (!mPreserveSelection) { 4031 /* 4032 * Leave current selection when we tentatively destroy action mode for the 4033 * selection. If we're detaching from a window, we'll bring back the selection 4034 * mode when (if) we get reattached. 4035 */ 4036 Selection.setSelection((Spannable) mTextView.getText(), 4037 mTextView.getSelectionEnd()); 4038 } 4039 4040 if (mSelectionModifierCursorController != null) { 4041 mSelectionModifierCursorController.hide(); 4042 } 4043 } 4044 4045 @Override 4046 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 4047 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 4048 super.onGetContentRect(mode, view, outRect); 4049 return; 4050 } 4051 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 4052 // We have a selection. 4053 mSelectionPath.reset(); 4054 mTextView.getLayout().getSelectionPath( 4055 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 4056 mSelectionPath.computeBounds(mSelectionBounds, true); 4057 mSelectionBounds.bottom += mHandleHeight; 4058 } else { 4059 // We have a cursor. 4060 Layout layout = mTextView.getLayout(); 4061 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 4062 float primaryHorizontal = clampHorizontalPosition(null, 4063 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 4064 mSelectionBounds.set( 4065 primaryHorizontal, 4066 layout.getLineTop(line), 4067 primaryHorizontal, 4068 layout.getLineBottom(line) - layout.getLineBottom(line) + mHandleHeight); 4069 } 4070 // Take TextView's padding and scroll into account. 4071 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4072 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4073 outRect.set( 4074 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4075 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4076 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4077 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4078 } 4079 } 4080 4081 /** 4082 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4083 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4084 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4085 */ 4086 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4087 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4088 final int[] mTmpIntOffset = new int[2]; 4089 final Matrix mViewToScreenMatrix = new Matrix(); 4090 4091 @Override 4092 public void updatePosition(int parentPositionX, int parentPositionY, 4093 boolean parentPositionChanged, boolean parentScrolled) { 4094 final InputMethodState ims = mInputMethodState; 4095 if (ims == null || ims.mBatchEditNesting > 0) { 4096 return; 4097 } 4098 final InputMethodManager imm = InputMethodManager.peekInstance(); 4099 if (null == imm) { 4100 return; 4101 } 4102 if (!imm.isActive(mTextView)) { 4103 return; 4104 } 4105 // Skip if the IME has not requested the cursor/anchor position. 4106 if (!imm.isCursorAnchorInfoEnabled()) { 4107 return; 4108 } 4109 Layout layout = mTextView.getLayout(); 4110 if (layout == null) { 4111 return; 4112 } 4113 4114 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4115 builder.reset(); 4116 4117 final int selectionStart = mTextView.getSelectionStart(); 4118 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4119 4120 // Construct transformation matrix from view local coordinates to screen coordinates. 4121 mViewToScreenMatrix.set(mTextView.getMatrix()); 4122 mTextView.getLocationOnScreen(mTmpIntOffset); 4123 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4124 builder.setMatrix(mViewToScreenMatrix); 4125 4126 final float viewportToContentHorizontalOffset = 4127 mTextView.viewportToContentHorizontalOffset(); 4128 final float viewportToContentVerticalOffset = 4129 mTextView.viewportToContentVerticalOffset(); 4130 4131 final CharSequence text = mTextView.getText(); 4132 if (text instanceof Spannable) { 4133 final Spannable sp = (Spannable) text; 4134 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4135 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4136 if (composingTextEnd < composingTextStart) { 4137 final int temp = composingTextEnd; 4138 composingTextEnd = composingTextStart; 4139 composingTextStart = temp; 4140 } 4141 final boolean hasComposingText = 4142 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4143 if (hasComposingText) { 4144 final CharSequence composingText = text.subSequence(composingTextStart, 4145 composingTextEnd); 4146 builder.setComposingText(composingTextStart, composingText); 4147 mTextView.populateCharacterBounds(builder, composingTextStart, 4148 composingTextEnd, viewportToContentHorizontalOffset, 4149 viewportToContentVerticalOffset); 4150 } 4151 } 4152 4153 // Treat selectionStart as the insertion point. 4154 if (0 <= selectionStart) { 4155 final int offset = selectionStart; 4156 final int line = layout.getLineForOffset(offset); 4157 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4158 + viewportToContentHorizontalOffset; 4159 final float insertionMarkerTop = layout.getLineTop(line) 4160 + viewportToContentVerticalOffset; 4161 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4162 + viewportToContentVerticalOffset; 4163 final float insertionMarkerBottom = layout.getLineBottomWithoutSpacing(line) 4164 + viewportToContentVerticalOffset; 4165 final boolean isTopVisible = mTextView 4166 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4167 final boolean isBottomVisible = mTextView 4168 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4169 int insertionMarkerFlags = 0; 4170 if (isTopVisible || isBottomVisible) { 4171 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4172 } 4173 if (!isTopVisible || !isBottomVisible) { 4174 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4175 } 4176 if (layout.isRtlCharAt(offset)) { 4177 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4178 } 4179 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4180 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4181 } 4182 4183 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4184 } 4185 } 4186 4187 @VisibleForTesting 4188 public abstract class HandleView extends View implements TextViewPositionListener { 4189 protected Drawable mDrawable; 4190 protected Drawable mDrawableLtr; 4191 protected Drawable mDrawableRtl; 4192 private final PopupWindow mContainer; 4193 // Position with respect to the parent TextView 4194 private int mPositionX, mPositionY; 4195 private boolean mIsDragging; 4196 // Offset from touch position to mPosition 4197 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4198 protected int mHotspotX; 4199 protected int mHorizontalGravity; 4200 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4201 private float mTouchOffsetY; 4202 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4203 private float mIdealVerticalOffset; 4204 // Parent's (TextView) previous position in window 4205 private int mLastParentX, mLastParentY; 4206 // Parent's (TextView) previous position on screen 4207 private int mLastParentXOnScreen, mLastParentYOnScreen; 4208 // Previous text character offset 4209 protected int mPreviousOffset = -1; 4210 // Previous text character offset 4211 private boolean mPositionHasChanged = true; 4212 // Minimum touch target size for handles 4213 private int mMinSize; 4214 // Indicates the line of text that the handle is on. 4215 protected int mPrevLine = UNSET_LINE; 4216 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4217 // when selecting text when the handles jump to the end / start of words which may be on 4218 // a different line. 4219 protected int mPreviousLineTouched = UNSET_LINE; 4220 4221 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4222 super(mTextView.getContext()); 4223 setId(id); 4224 mContainer = new PopupWindow(mTextView.getContext(), null, 4225 com.android.internal.R.attr.textSelectHandleWindowStyle); 4226 mContainer.setSplitTouchEnabled(true); 4227 mContainer.setClippingEnabled(false); 4228 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4229 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4230 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4231 mContainer.setContentView(this); 4232 4233 mDrawableLtr = drawableLtr; 4234 mDrawableRtl = drawableRtl; 4235 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4236 com.android.internal.R.dimen.text_handle_min_size); 4237 4238 updateDrawable(); 4239 4240 final int handleHeight = getPreferredHeight(); 4241 mTouchOffsetY = -0.3f * handleHeight; 4242 mIdealVerticalOffset = 0.7f * handleHeight; 4243 } 4244 4245 public float getIdealVerticalOffset() { 4246 return mIdealVerticalOffset; 4247 } 4248 4249 protected void updateDrawable() { 4250 if (mIsDragging) { 4251 // Don't update drawable during dragging. 4252 return; 4253 } 4254 final Layout layout = mTextView.getLayout(); 4255 if (layout == null) { 4256 return; 4257 } 4258 final int offset = getCurrentCursorOffset(); 4259 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4260 final Drawable oldDrawable = mDrawable; 4261 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4262 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4263 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4264 if (oldDrawable != mDrawable && isShowing()) { 4265 // Update popup window position. 4266 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4267 - getHorizontalOffset() + getCursorOffset(); 4268 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4269 mPositionHasChanged = true; 4270 updatePosition(mLastParentX, mLastParentY, false, false); 4271 postInvalidate(); 4272 } 4273 } 4274 4275 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4276 protected abstract int getHorizontalGravity(boolean isRtlRun); 4277 4278 // Touch-up filter: number of previous positions remembered 4279 private static final int HISTORY_SIZE = 5; 4280 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4281 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4282 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4283 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4284 private int mPreviousOffsetIndex = 0; 4285 private int mNumberPreviousOffsets = 0; 4286 4287 private void startTouchUpFilter(int offset) { 4288 mNumberPreviousOffsets = 0; 4289 addPositionToTouchUpFilter(offset); 4290 } 4291 4292 private void addPositionToTouchUpFilter(int offset) { 4293 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4294 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4295 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4296 mNumberPreviousOffsets++; 4297 } 4298 4299 private void filterOnTouchUp(boolean fromTouchScreen) { 4300 final long now = SystemClock.uptimeMillis(); 4301 int i = 0; 4302 int index = mPreviousOffsetIndex; 4303 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4304 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4305 i++; 4306 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4307 } 4308 4309 if (i > 0 && i < iMax 4310 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4311 positionAtCursorOffset(mPreviousOffsets[index], false, fromTouchScreen); 4312 } 4313 } 4314 4315 public boolean offsetHasBeenChanged() { 4316 return mNumberPreviousOffsets > 1; 4317 } 4318 4319 @Override 4320 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4321 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4322 } 4323 4324 @Override 4325 public void invalidate() { 4326 super.invalidate(); 4327 if (isShowing()) { 4328 positionAtCursorOffset(getCurrentCursorOffset(), true, false); 4329 } 4330 }; 4331 4332 private int getPreferredWidth() { 4333 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4334 } 4335 4336 private int getPreferredHeight() { 4337 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4338 } 4339 4340 public void show() { 4341 if (isShowing()) return; 4342 4343 getPositionListener().addSubscriber(this, true /* local position may change */); 4344 4345 // Make sure the offset is always considered new, even when focusing at same position 4346 mPreviousOffset = -1; 4347 positionAtCursorOffset(getCurrentCursorOffset(), false, false); 4348 } 4349 4350 protected void dismiss() { 4351 mIsDragging = false; 4352 mContainer.dismiss(); 4353 onDetached(); 4354 } 4355 4356 public void hide() { 4357 dismiss(); 4358 4359 getPositionListener().removeSubscriber(this); 4360 } 4361 4362 public boolean isShowing() { 4363 return mContainer.isShowing(); 4364 } 4365 4366 private boolean isVisible() { 4367 // Always show a dragging handle. 4368 if (mIsDragging) { 4369 return true; 4370 } 4371 4372 if (mTextView.isInBatchEditMode()) { 4373 return false; 4374 } 4375 4376 return mTextView.isPositionVisible( 4377 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4378 } 4379 4380 public abstract int getCurrentCursorOffset(); 4381 4382 protected abstract void updateSelection(int offset); 4383 4384 protected abstract void updatePosition(float x, float y, boolean fromTouchScreen); 4385 4386 @MagnifierHandleTrigger 4387 protected abstract int getMagnifierHandleTrigger(); 4388 4389 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4390 return layout.isRtlCharAt(offset); 4391 } 4392 4393 @VisibleForTesting 4394 public float getHorizontal(@NonNull Layout layout, int offset) { 4395 return layout.getPrimaryHorizontal(offset); 4396 } 4397 4398 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4399 return mTextView.getOffsetAtCoordinate(line, x); 4400 } 4401 4402 /** 4403 * @param offset Cursor offset. Must be in [-1, length]. 4404 * @param forceUpdatePosition whether to force update the position. This should be true 4405 * when If the parent has been scrolled, for example. 4406 * @param fromTouchScreen {@code true} if the cursor is moved with motion events from the 4407 * touch screen. 4408 */ 4409 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4410 boolean fromTouchScreen) { 4411 // A HandleView relies on the layout, which may be nulled by external methods 4412 Layout layout = mTextView.getLayout(); 4413 if (layout == null) { 4414 // Will update controllers' state, hiding them and stopping selection mode if needed 4415 prepareCursorControllers(); 4416 return; 4417 } 4418 layout = mTextView.getLayout(); 4419 4420 boolean offsetChanged = offset != mPreviousOffset; 4421 if (offsetChanged || forceUpdatePosition) { 4422 if (offsetChanged) { 4423 updateSelection(offset); 4424 if (fromTouchScreen && mHapticTextHandleEnabled) { 4425 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 4426 } 4427 addPositionToTouchUpFilter(offset); 4428 } 4429 final int line = layout.getLineForOffset(offset); 4430 mPrevLine = line; 4431 4432 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4433 - getHorizontalOffset() + getCursorOffset(); 4434 mPositionY = layout.getLineBottomWithoutSpacing(line); 4435 4436 // Take TextView's padding and scroll into account. 4437 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4438 mPositionY += mTextView.viewportToContentVerticalOffset(); 4439 4440 mPreviousOffset = offset; 4441 mPositionHasChanged = true; 4442 } 4443 } 4444 4445 /** 4446 * Return the clamped horizontal position for the cursor. 4447 * 4448 * @param layout Text layout. 4449 * @param offset Character offset for the cursor. 4450 * @return The clamped horizontal position for the cursor. 4451 */ 4452 int getCursorHorizontalPosition(Layout layout, int offset) { 4453 return (int) (getHorizontal(layout, offset) - 0.5f); 4454 } 4455 4456 @Override 4457 public void updatePosition(int parentPositionX, int parentPositionY, 4458 boolean parentPositionChanged, boolean parentScrolled) { 4459 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled, false); 4460 if (parentPositionChanged || mPositionHasChanged) { 4461 if (mIsDragging) { 4462 // Update touchToWindow offset in case of parent scrolling while dragging 4463 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4464 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4465 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4466 mLastParentX = parentPositionX; 4467 mLastParentY = parentPositionY; 4468 } 4469 4470 onHandleMoved(); 4471 } 4472 4473 if (isVisible()) { 4474 // Transform to the window coordinates to follow the view tranformation. 4475 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4476 mTextView.transformFromViewToWindowSpace(pts); 4477 pts[0] -= mHotspotX + getHorizontalOffset(); 4478 4479 if (isShowing()) { 4480 mContainer.update(pts[0], pts[1], -1, -1); 4481 } else { 4482 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4483 } 4484 } else { 4485 if (isShowing()) { 4486 dismiss(); 4487 } 4488 } 4489 4490 mPositionHasChanged = false; 4491 } 4492 } 4493 4494 @Override 4495 protected void onDraw(Canvas c) { 4496 final int drawWidth = mDrawable.getIntrinsicWidth(); 4497 final int left = getHorizontalOffset(); 4498 4499 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4500 mDrawable.draw(c); 4501 } 4502 4503 private int getHorizontalOffset() { 4504 final int width = getPreferredWidth(); 4505 final int drawWidth = mDrawable.getIntrinsicWidth(); 4506 final int left; 4507 switch (mHorizontalGravity) { 4508 case Gravity.LEFT: 4509 left = 0; 4510 break; 4511 default: 4512 case Gravity.CENTER: 4513 left = (width - drawWidth) / 2; 4514 break; 4515 case Gravity.RIGHT: 4516 left = width - drawWidth; 4517 break; 4518 } 4519 return left; 4520 } 4521 4522 protected int getCursorOffset() { 4523 return 0; 4524 } 4525 4526 protected final void showMagnifier() { 4527 if (mMagnifier == null) { 4528 return; 4529 } 4530 4531 final int trigger = getMagnifierHandleTrigger(); 4532 final int offset; 4533 switch (trigger) { 4534 case MagnifierHandleTrigger.INSERTION: // Fall through. 4535 case MagnifierHandleTrigger.SELECTION_START: 4536 offset = mTextView.getSelectionStart(); 4537 break; 4538 case MagnifierHandleTrigger.SELECTION_END: 4539 offset = mTextView.getSelectionEnd(); 4540 break; 4541 default: 4542 offset = -1; 4543 break; 4544 } 4545 4546 if (offset == -1) { 4547 dismissMagnifier(); 4548 } 4549 4550 final Layout layout = mTextView.getLayout(); 4551 final int lineNumber = layout.getLineForOffset(offset); 4552 // Horizontally snap to character offset. 4553 final float xPosInView = getHorizontal(mTextView.getLayout(), offset); 4554 // Vertically snap to middle of current line. 4555 final float yPosInView = (mTextView.getLayout().getLineTop(lineNumber) 4556 + mTextView.getLayout().getLineBottom(lineNumber)) / 2.0f; 4557 final int[] coordinatesOnScreen = new int[2]; 4558 mTextView.getLocationOnScreen(coordinatesOnScreen); 4559 final float centerXOnScreen = mTextView.convertViewToScreenCoord(xPosInView, true); 4560 final float centerYOnScreen = mTextView.convertViewToScreenCoord(yPosInView, false); 4561 4562 suspendBlink(); 4563 mMagnifier.show(centerXOnScreen, centerYOnScreen, MAGNIFIER_ZOOM); 4564 } 4565 4566 protected final void dismissMagnifier() { 4567 if (mMagnifier != null) { 4568 mMagnifier.dismiss(); 4569 resumeBlink(); 4570 } 4571 } 4572 4573 @Override 4574 public boolean onTouchEvent(MotionEvent ev) { 4575 updateFloatingToolbarVisibility(ev); 4576 4577 switch (ev.getActionMasked()) { 4578 case MotionEvent.ACTION_DOWN: { 4579 startTouchUpFilter(getCurrentCursorOffset()); 4580 4581 final PositionListener positionListener = getPositionListener(); 4582 mLastParentX = positionListener.getPositionX(); 4583 mLastParentY = positionListener.getPositionY(); 4584 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4585 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4586 4587 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4588 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4589 mTouchToWindowOffsetX = xInWindow - mPositionX; 4590 mTouchToWindowOffsetY = yInWindow - mPositionY; 4591 4592 mIsDragging = true; 4593 mPreviousLineTouched = UNSET_LINE; 4594 break; 4595 } 4596 4597 case MotionEvent.ACTION_MOVE: { 4598 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4599 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4600 4601 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4602 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4603 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4604 float newVerticalOffset; 4605 if (previousVerticalOffset < mIdealVerticalOffset) { 4606 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4607 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4608 } else { 4609 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4610 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4611 } 4612 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4613 4614 final float newPosX = 4615 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4616 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4617 4618 updatePosition(newPosX, newPosY, 4619 ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4620 break; 4621 } 4622 4623 case MotionEvent.ACTION_UP: 4624 filterOnTouchUp(ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4625 // Fall through. 4626 case MotionEvent.ACTION_CANCEL: 4627 mIsDragging = false; 4628 updateDrawable(); 4629 break; 4630 } 4631 return true; 4632 } 4633 4634 public boolean isDragging() { 4635 return mIsDragging; 4636 } 4637 4638 void onHandleMoved() {} 4639 4640 public void onDetached() {} 4641 } 4642 4643 private class InsertionHandleView extends HandleView { 4644 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4645 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4646 4647 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4648 private float mDownPositionX, mDownPositionY; 4649 private Runnable mHider; 4650 4651 public InsertionHandleView(Drawable drawable) { 4652 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4653 } 4654 4655 @Override 4656 public void show() { 4657 super.show(); 4658 4659 final long durationSinceCutOrCopy = 4660 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4661 4662 // Cancel the single tap delayed runnable. 4663 if (mInsertionActionModeRunnable != null 4664 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4665 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4666 || isCursorInsideEasyCorrectionSpan())) { 4667 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4668 } 4669 4670 // Prepare and schedule the single tap runnable to run exactly after the double tap 4671 // timeout has passed. 4672 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4673 && !isCursorInsideEasyCorrectionSpan() 4674 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4675 if (mTextActionMode == null) { 4676 if (mInsertionActionModeRunnable == null) { 4677 mInsertionActionModeRunnable = new Runnable() { 4678 @Override 4679 public void run() { 4680 startInsertionActionMode(); 4681 } 4682 }; 4683 } 4684 mTextView.postDelayed( 4685 mInsertionActionModeRunnable, 4686 ViewConfiguration.getDoubleTapTimeout() + 1); 4687 } 4688 4689 } 4690 4691 hideAfterDelay(); 4692 } 4693 4694 private void hideAfterDelay() { 4695 if (mHider == null) { 4696 mHider = new Runnable() { 4697 public void run() { 4698 hide(); 4699 } 4700 }; 4701 } else { 4702 removeHiderCallback(); 4703 } 4704 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4705 } 4706 4707 private void removeHiderCallback() { 4708 if (mHider != null) { 4709 mTextView.removeCallbacks(mHider); 4710 } 4711 } 4712 4713 @Override 4714 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4715 return drawable.getIntrinsicWidth() / 2; 4716 } 4717 4718 @Override 4719 protected int getHorizontalGravity(boolean isRtlRun) { 4720 return Gravity.CENTER_HORIZONTAL; 4721 } 4722 4723 @Override 4724 protected int getCursorOffset() { 4725 int offset = super.getCursorOffset(); 4726 if (mDrawableForCursor != null) { 4727 mDrawableForCursor.getPadding(mTempRect); 4728 offset += (mDrawableForCursor.getIntrinsicWidth() 4729 - mTempRect.left - mTempRect.right) / 2; 4730 } 4731 return offset; 4732 } 4733 4734 @Override 4735 int getCursorHorizontalPosition(Layout layout, int offset) { 4736 if (mDrawableForCursor != null) { 4737 final float horizontal = getHorizontal(layout, offset); 4738 return clampHorizontalPosition(mDrawableForCursor, horizontal) + mTempRect.left; 4739 } 4740 return super.getCursorHorizontalPosition(layout, offset); 4741 } 4742 4743 @Override 4744 public boolean onTouchEvent(MotionEvent ev) { 4745 final boolean result = super.onTouchEvent(ev); 4746 4747 switch (ev.getActionMasked()) { 4748 case MotionEvent.ACTION_DOWN: 4749 mDownPositionX = ev.getRawX(); 4750 mDownPositionY = ev.getRawY(); 4751 showMagnifier(); 4752 break; 4753 4754 case MotionEvent.ACTION_MOVE: 4755 showMagnifier(); 4756 break; 4757 4758 case MotionEvent.ACTION_UP: 4759 if (!offsetHasBeenChanged()) { 4760 final float deltaX = mDownPositionX - ev.getRawX(); 4761 final float deltaY = mDownPositionY - ev.getRawY(); 4762 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4763 4764 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4765 mTextView.getContext()); 4766 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4767 4768 if (distanceSquared < touchSlop * touchSlop) { 4769 // Tapping on the handle toggles the insertion action mode. 4770 if (mTextActionMode != null) { 4771 stopTextActionMode(); 4772 } else { 4773 startInsertionActionMode(); 4774 } 4775 } 4776 } else { 4777 if (mTextActionMode != null) { 4778 mTextActionMode.invalidateContentRect(); 4779 } 4780 } 4781 // Fall through. 4782 case MotionEvent.ACTION_CANCEL: 4783 hideAfterDelay(); 4784 dismissMagnifier(); 4785 break; 4786 4787 default: 4788 break; 4789 } 4790 4791 return result; 4792 } 4793 4794 @Override 4795 public int getCurrentCursorOffset() { 4796 return mTextView.getSelectionStart(); 4797 } 4798 4799 @Override 4800 public void updateSelection(int offset) { 4801 Selection.setSelection((Spannable) mTextView.getText(), offset); 4802 } 4803 4804 @Override 4805 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4806 Layout layout = mTextView.getLayout(); 4807 int offset; 4808 if (layout != null) { 4809 if (mPreviousLineTouched == UNSET_LINE) { 4810 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4811 } 4812 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4813 offset = getOffsetAtCoordinate(layout, currLine, x); 4814 mPreviousLineTouched = currLine; 4815 } else { 4816 offset = -1; 4817 } 4818 positionAtCursorOffset(offset, false, fromTouchScreen); 4819 if (mTextActionMode != null) { 4820 invalidateActionMode(); 4821 } 4822 } 4823 4824 @Override 4825 void onHandleMoved() { 4826 super.onHandleMoved(); 4827 removeHiderCallback(); 4828 } 4829 4830 @Override 4831 public void onDetached() { 4832 super.onDetached(); 4833 removeHiderCallback(); 4834 } 4835 4836 @Override 4837 @MagnifierHandleTrigger 4838 protected int getMagnifierHandleTrigger() { 4839 return MagnifierHandleTrigger.INSERTION; 4840 } 4841 } 4842 4843 @Retention(RetentionPolicy.SOURCE) 4844 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4845 public @interface HandleType {} 4846 public static final int HANDLE_TYPE_SELECTION_START = 0; 4847 public static final int HANDLE_TYPE_SELECTION_END = 1; 4848 4849 /** For selection handles */ 4850 @VisibleForTesting 4851 public final class SelectionHandleView extends HandleView { 4852 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4853 // end (HANDLE_TYPE_SELECTION_END). 4854 @HandleType 4855 private final int mHandleType; 4856 // Indicates whether the cursor is making adjustments within a word. 4857 private boolean mInWord = false; 4858 // Difference between touch position and word boundary position. 4859 private float mTouchWordDelta; 4860 // X value of the previous updatePosition call. 4861 private float mPrevX; 4862 // Indicates if the handle has moved a boundary between LTR and RTL text. 4863 private boolean mLanguageDirectionChanged = false; 4864 // Distance from edge of horizontally scrolling text view 4865 // to use to switch to character mode. 4866 private final float mTextViewEdgeSlop; 4867 // Used to save text view location. 4868 private final int[] mTextViewLocation = new int[2]; 4869 4870 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4871 @HandleType int handleType) { 4872 super(drawableLtr, drawableRtl, id); 4873 mHandleType = handleType; 4874 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4875 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4876 } 4877 4878 private boolean isStartHandle() { 4879 return mHandleType == HANDLE_TYPE_SELECTION_START; 4880 } 4881 4882 @Override 4883 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4884 if (isRtlRun == isStartHandle()) { 4885 return drawable.getIntrinsicWidth() / 4; 4886 } else { 4887 return (drawable.getIntrinsicWidth() * 3) / 4; 4888 } 4889 } 4890 4891 @Override 4892 protected int getHorizontalGravity(boolean isRtlRun) { 4893 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4894 } 4895 4896 @Override 4897 public int getCurrentCursorOffset() { 4898 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4899 } 4900 4901 @Override 4902 protected void updateSelection(int offset) { 4903 if (isStartHandle()) { 4904 Selection.setSelection((Spannable) mTextView.getText(), offset, 4905 mTextView.getSelectionEnd()); 4906 } else { 4907 Selection.setSelection((Spannable) mTextView.getText(), 4908 mTextView.getSelectionStart(), offset); 4909 } 4910 updateDrawable(); 4911 if (mTextActionMode != null) { 4912 invalidateActionMode(); 4913 } 4914 } 4915 4916 @Override 4917 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4918 final Layout layout = mTextView.getLayout(); 4919 if (layout == null) { 4920 // HandleView will deal appropriately in positionAtCursorOffset when 4921 // layout is null. 4922 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y), 4923 fromTouchScreen); 4924 return; 4925 } 4926 4927 if (mPreviousLineTouched == UNSET_LINE) { 4928 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4929 } 4930 4931 boolean positionCursor = false; 4932 final int anotherHandleOffset = 4933 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4934 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4935 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4936 4937 if (isStartHandle() && initialOffset >= anotherHandleOffset 4938 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4939 // Handles have crossed, bound it to the first selected line and 4940 // adjust by word / char as normal. 4941 currLine = layout.getLineForOffset(anotherHandleOffset); 4942 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 4943 } 4944 4945 int offset = initialOffset; 4946 final int wordEnd = getWordEnd(offset); 4947 final int wordStart = getWordStart(offset); 4948 4949 if (mPrevX == UNSET_X_VALUE) { 4950 mPrevX = x; 4951 } 4952 4953 final int currentOffset = getCurrentCursorOffset(); 4954 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 4955 final boolean atRtl = isAtRtlRun(layout, offset); 4956 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4957 4958 // We can't determine if the user is expanding or shrinking the selection if they're 4959 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4960 // the cursor at the current position. 4961 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4962 // We're on a boundary or this is the first direction change -- just update 4963 // to the current position. 4964 mLanguageDirectionChanged = true; 4965 mTouchWordDelta = 0.0f; 4966 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4967 return; 4968 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4969 // We've just moved past the boundary so update the position. After this we can 4970 // figure out if the user is expanding or shrinking to go by word or character. 4971 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 4972 mTouchWordDelta = 0.0f; 4973 mLanguageDirectionChanged = false; 4974 return; 4975 } 4976 4977 boolean isExpanding; 4978 final float xDiff = x - mPrevX; 4979 if (isStartHandle()) { 4980 isExpanding = currLine < mPreviousLineTouched; 4981 } else { 4982 isExpanding = currLine > mPreviousLineTouched; 4983 } 4984 if (atRtl == isStartHandle()) { 4985 isExpanding |= xDiff > 0; 4986 } else { 4987 isExpanding |= xDiff < 0; 4988 } 4989 4990 if (mTextView.getHorizontallyScrolling()) { 4991 if (positionNearEdgeOfScrollingView(x, atRtl) 4992 && ((isStartHandle() && mTextView.getScrollX() != 0) 4993 || (!isStartHandle() 4994 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4995 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4996 || (!isStartHandle() && offset > currentOffset))) 4997 || !isExpanding)) { 4998 // If we're expanding ensure that the offset is actually expanding compared to 4999 // the current offset, if the handle snapped to the word, the finger position 5000 // may be out of sync and we don't want the selection to jump back. 5001 mTouchWordDelta = 0.0f; 5002 final int nextOffset = (atRtl == isStartHandle()) 5003 ? layout.getOffsetToRightOf(mPreviousOffset) 5004 : layout.getOffsetToLeftOf(mPreviousOffset); 5005 positionAndAdjustForCrossingHandles(nextOffset, fromTouchScreen); 5006 return; 5007 } 5008 } 5009 5010 if (isExpanding) { 5011 // User is increasing the selection. 5012 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 5013 final boolean snapToWord = (!mInWord 5014 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 5015 && atRtl == isAtRtlRun(layout, wordBoundary); 5016 if (snapToWord) { 5017 // Sometimes words can be broken across lines (Chinese, hyphenation). 5018 // We still snap to the word boundary but we only use the letters on the 5019 // current line to determine if the user is far enough into the word to snap. 5020 if (layout.getLineForOffset(wordBoundary) != currLine) { 5021 wordBoundary = isStartHandle() 5022 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 5023 } 5024 final int offsetThresholdToSnap = isStartHandle() 5025 ? wordEnd - ((wordEnd - wordBoundary) / 2) 5026 : wordStart + ((wordBoundary - wordStart) / 2); 5027 if (isStartHandle() 5028 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 5029 // User is far enough into the word or on a different line so we expand by 5030 // word. 5031 offset = wordStart; 5032 } else if (!isStartHandle() 5033 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 5034 // User is far enough into the word or on a different line so we expand by 5035 // word. 5036 offset = wordEnd; 5037 } else { 5038 offset = mPreviousOffset; 5039 } 5040 } 5041 if ((isStartHandle() && offset < initialOffset) 5042 || (!isStartHandle() && offset > initialOffset)) { 5043 final float adjustedX = getHorizontal(layout, offset); 5044 mTouchWordDelta = 5045 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 5046 } else { 5047 mTouchWordDelta = 0.0f; 5048 } 5049 positionCursor = true; 5050 } else { 5051 final int adjustedOffset = 5052 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 5053 final boolean shrinking = isStartHandle() 5054 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 5055 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 5056 if (shrinking) { 5057 // User is shrinking the selection. 5058 if (currLine != mPrevLine) { 5059 // We're on a different line, so we'll snap to word boundaries. 5060 offset = isStartHandle() ? wordStart : wordEnd; 5061 if ((isStartHandle() && offset < initialOffset) 5062 || (!isStartHandle() && offset > initialOffset)) { 5063 final float adjustedX = getHorizontal(layout, offset); 5064 mTouchWordDelta = 5065 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 5066 } else { 5067 mTouchWordDelta = 0.0f; 5068 } 5069 } else { 5070 offset = adjustedOffset; 5071 } 5072 positionCursor = true; 5073 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 5074 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 5075 // Handle has jumped to the word boundary, and the user is moving 5076 // their finger towards the handle, the delta should be updated. 5077 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 5078 - getHorizontal(layout, mPreviousOffset); 5079 } 5080 } 5081 5082 if (positionCursor) { 5083 mPreviousLineTouched = currLine; 5084 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5085 } 5086 mPrevX = x; 5087 } 5088 5089 @Override 5090 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 5091 boolean fromTouchScreen) { 5092 super.positionAtCursorOffset(offset, forceUpdatePosition, fromTouchScreen); 5093 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 5094 } 5095 5096 @Override 5097 public boolean onTouchEvent(MotionEvent event) { 5098 boolean superResult = super.onTouchEvent(event); 5099 5100 switch (event.getActionMasked()) { 5101 case MotionEvent.ACTION_DOWN: 5102 // Reset the touch word offset and x value when the user 5103 // re-engages the handle. 5104 mTouchWordDelta = 0.0f; 5105 mPrevX = UNSET_X_VALUE; 5106 showMagnifier(); 5107 break; 5108 5109 case MotionEvent.ACTION_MOVE: 5110 showMagnifier(); 5111 break; 5112 5113 case MotionEvent.ACTION_UP: 5114 case MotionEvent.ACTION_CANCEL: 5115 dismissMagnifier(); 5116 break; 5117 } 5118 5119 return superResult; 5120 } 5121 5122 private void positionAndAdjustForCrossingHandles(int offset, boolean fromTouchScreen) { 5123 final int anotherHandleOffset = 5124 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5125 if ((isStartHandle() && offset >= anotherHandleOffset) 5126 || (!isStartHandle() && offset <= anotherHandleOffset)) { 5127 mTouchWordDelta = 0.0f; 5128 final Layout layout = mTextView.getLayout(); 5129 if (layout != null && offset != anotherHandleOffset) { 5130 final float horiz = getHorizontal(layout, offset); 5131 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 5132 !isStartHandle()); 5133 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 5134 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 5135 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 5136 // This handle passes another one as it crossed a direction boundary. 5137 // Don't minimize the selection, but keep the handle at the run boundary. 5138 final int currentOffset = getCurrentCursorOffset(); 5139 final int offsetToGetRunRange = isStartHandle() 5140 ? currentOffset : Math.max(currentOffset - 1, 0); 5141 final long range = layout.getRunRange(offsetToGetRunRange); 5142 if (isStartHandle()) { 5143 offset = TextUtils.unpackRangeStartFromLong(range); 5144 } else { 5145 offset = TextUtils.unpackRangeEndFromLong(range); 5146 } 5147 positionAtCursorOffset(offset, false, fromTouchScreen); 5148 return; 5149 } 5150 } 5151 // Handles can not cross and selection is at least one character. 5152 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5153 } 5154 positionAtCursorOffset(offset, false, fromTouchScreen); 5155 } 5156 5157 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5158 mTextView.getLocationOnScreen(mTextViewLocation); 5159 boolean nearEdge; 5160 if (atRtl == isStartHandle()) { 5161 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5162 - mTextView.getPaddingRight(); 5163 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5164 } else { 5165 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5166 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5167 } 5168 return nearEdge; 5169 } 5170 5171 @Override 5172 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5173 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5174 return layout.isRtlCharAt(offsetToCheck); 5175 } 5176 5177 @Override 5178 public float getHorizontal(@NonNull Layout layout, int offset) { 5179 return getHorizontal(layout, offset, isStartHandle()); 5180 } 5181 5182 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5183 final int line = layout.getLineForOffset(offset); 5184 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5185 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5186 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5187 return (isRtlChar == isRtlParagraph) 5188 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5189 } 5190 5191 @Override 5192 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5193 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5194 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5195 if (!layout.isLevelBoundary(primaryOffset)) { 5196 return primaryOffset; 5197 } 5198 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5199 final int currentOffset = getCurrentCursorOffset(); 5200 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5201 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5202 if (primaryDiff < secondaryDiff) { 5203 return primaryOffset; 5204 } else if (primaryDiff > secondaryDiff) { 5205 return secondaryOffset; 5206 } else { 5207 final int offsetToCheck = isStartHandle() 5208 ? currentOffset : Math.max(currentOffset - 1, 0); 5209 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5210 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5211 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5212 } 5213 } 5214 5215 @MagnifierHandleTrigger 5216 protected int getMagnifierHandleTrigger() { 5217 return isStartHandle() 5218 ? MagnifierHandleTrigger.SELECTION_START 5219 : MagnifierHandleTrigger.SELECTION_END; 5220 } 5221 } 5222 5223 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5224 final int trueLine = mTextView.getLineAtCoordinate(y); 5225 if (layout == null || prevLine > layout.getLineCount() 5226 || layout.getLineCount() <= 0 || prevLine < 0) { 5227 // Invalid parameters, just return whatever line is at y. 5228 return trueLine; 5229 } 5230 5231 if (Math.abs(trueLine - prevLine) >= 2) { 5232 // Only stick to lines if we're within a line of the previous selection. 5233 return trueLine; 5234 } 5235 5236 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5237 final int lineCount = layout.getLineCount(); 5238 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5239 5240 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5241 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5242 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5243 5244 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5245 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5246 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5247 5248 // Determine if we've moved lines based on y position and previous line. 5249 int currLine; 5250 if (y <= yTopBound) { 5251 currLine = Math.max(prevLine - 1, 0); 5252 } else if (y >= yBottomBound) { 5253 currLine = Math.min(prevLine + 1, lineCount - 1); 5254 } else { 5255 currLine = prevLine; 5256 } 5257 return currLine; 5258 } 5259 5260 /** 5261 * A CursorController instance can be used to control a cursor in the text. 5262 */ 5263 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5264 /** 5265 * Makes the cursor controller visible on screen. 5266 * See also {@link #hide()}. 5267 */ 5268 public void show(); 5269 5270 /** 5271 * Hide the cursor controller from screen. 5272 * See also {@link #show()}. 5273 */ 5274 public void hide(); 5275 5276 /** 5277 * Called when the view is detached from window. Perform house keeping task, such as 5278 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5279 * preventing the activity from being recycled. 5280 */ 5281 public void onDetached(); 5282 5283 public boolean isCursorBeingModified(); 5284 5285 public boolean isActive(); 5286 } 5287 5288 private class InsertionPointCursorController implements CursorController { 5289 private InsertionHandleView mHandle; 5290 5291 public void show() { 5292 getHandle().show(); 5293 5294 if (mSelectionModifierCursorController != null) { 5295 mSelectionModifierCursorController.hide(); 5296 } 5297 } 5298 5299 public void hide() { 5300 if (mHandle != null) { 5301 mHandle.hide(); 5302 } 5303 } 5304 5305 public void onTouchModeChanged(boolean isInTouchMode) { 5306 if (!isInTouchMode) { 5307 hide(); 5308 } 5309 } 5310 5311 private InsertionHandleView getHandle() { 5312 if (mSelectHandleCenter == null) { 5313 mSelectHandleCenter = mTextView.getContext().getDrawable( 5314 mTextView.mTextSelectHandleRes); 5315 } 5316 if (mHandle == null) { 5317 mHandle = new InsertionHandleView(mSelectHandleCenter); 5318 } 5319 return mHandle; 5320 } 5321 5322 @Override 5323 public void onDetached() { 5324 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5325 observer.removeOnTouchModeChangeListener(this); 5326 5327 if (mHandle != null) mHandle.onDetached(); 5328 } 5329 5330 @Override 5331 public boolean isCursorBeingModified() { 5332 return mHandle != null && mHandle.isDragging(); 5333 } 5334 5335 @Override 5336 public boolean isActive() { 5337 return mHandle != null && mHandle.isShowing(); 5338 } 5339 5340 public void invalidateHandle() { 5341 if (mHandle != null) { 5342 mHandle.invalidate(); 5343 } 5344 } 5345 } 5346 5347 class SelectionModifierCursorController implements CursorController { 5348 // The cursor controller handles, lazily created when shown. 5349 private SelectionHandleView mStartHandle; 5350 private SelectionHandleView mEndHandle; 5351 // The offsets of that last touch down event. Remembered to start selection there. 5352 private int mMinTouchOffset, mMaxTouchOffset; 5353 5354 private float mDownPositionX, mDownPositionY; 5355 private boolean mGestureStayedInTapRegion; 5356 5357 // Where the user first starts the drag motion. 5358 private int mStartOffset = -1; 5359 5360 private boolean mHaventMovedEnoughToStartDrag; 5361 // The line that a selection happened most recently with the drag accelerator. 5362 private int mLineSelectionIsOn = -1; 5363 // Whether the drag accelerator has selected past the initial line. 5364 private boolean mSwitchedLines = false; 5365 5366 // Indicates the drag accelerator mode that the user is currently using. 5367 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5368 // Drag accelerator is inactive. 5369 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5370 // Character based selection by dragging. Only for mouse. 5371 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5372 // Word based selection by dragging. Enabled after long pressing or double tapping. 5373 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5374 // Paragraph based selection by dragging. Enabled after mouse triple click. 5375 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5376 5377 SelectionModifierCursorController() { 5378 resetTouchOffsets(); 5379 } 5380 5381 public void show() { 5382 if (mTextView.isInBatchEditMode()) { 5383 return; 5384 } 5385 initDrawables(); 5386 initHandles(); 5387 } 5388 5389 private void initDrawables() { 5390 if (mSelectHandleLeft == null) { 5391 mSelectHandleLeft = mTextView.getContext().getDrawable( 5392 mTextView.mTextSelectHandleLeftRes); 5393 } 5394 if (mSelectHandleRight == null) { 5395 mSelectHandleRight = mTextView.getContext().getDrawable( 5396 mTextView.mTextSelectHandleRightRes); 5397 } 5398 } 5399 5400 private void initHandles() { 5401 // Lazy object creation has to be done before updatePosition() is called. 5402 if (mStartHandle == null) { 5403 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5404 com.android.internal.R.id.selection_start_handle, 5405 HANDLE_TYPE_SELECTION_START); 5406 } 5407 if (mEndHandle == null) { 5408 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5409 com.android.internal.R.id.selection_end_handle, 5410 HANDLE_TYPE_SELECTION_END); 5411 } 5412 5413 mStartHandle.show(); 5414 mEndHandle.show(); 5415 5416 hideInsertionPointCursorController(); 5417 } 5418 5419 public void hide() { 5420 if (mStartHandle != null) mStartHandle.hide(); 5421 if (mEndHandle != null) mEndHandle.hide(); 5422 } 5423 5424 public void enterDrag(int dragAcceleratorMode) { 5425 // Just need to init the handles / hide insertion cursor. 5426 show(); 5427 mDragAcceleratorMode = dragAcceleratorMode; 5428 // Start location of selection. 5429 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5430 mLastDownPositionY); 5431 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5432 // Don't show the handles until user has lifted finger. 5433 hide(); 5434 5435 // This stops scrolling parents from intercepting the touch event, allowing 5436 // the user to continue dragging across the screen to select text; TextView will 5437 // scroll as necessary. 5438 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5439 mTextView.cancelLongPress(); 5440 } 5441 5442 public void onTouchEvent(MotionEvent event) { 5443 // This is done even when the View does not have focus, so that long presses can start 5444 // selection and tap can move cursor from this tap position. 5445 final float eventX = event.getX(); 5446 final float eventY = event.getY(); 5447 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5448 switch (event.getActionMasked()) { 5449 case MotionEvent.ACTION_DOWN: 5450 if (extractedTextModeWillBeStarted()) { 5451 // Prevent duplicating the selection handles until the mode starts. 5452 hide(); 5453 } else { 5454 // Remember finger down position, to be able to start selection from there. 5455 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5456 eventX, eventY); 5457 5458 // Double tap detection 5459 if (mGestureStayedInTapRegion) { 5460 if (mTapState == TAP_STATE_DOUBLE_TAP 5461 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5462 final float deltaX = eventX - mDownPositionX; 5463 final float deltaY = eventY - mDownPositionY; 5464 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5465 5466 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5467 mTextView.getContext()); 5468 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5469 boolean stayedInArea = 5470 distanceSquared < doubleTapSlop * doubleTapSlop; 5471 5472 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5473 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5474 selectCurrentWordAndStartDrag(); 5475 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5476 selectCurrentParagraphAndStartDrag(); 5477 } 5478 mDiscardNextActionUp = true; 5479 } 5480 } 5481 } 5482 5483 mDownPositionX = eventX; 5484 mDownPositionY = eventY; 5485 mGestureStayedInTapRegion = true; 5486 mHaventMovedEnoughToStartDrag = true; 5487 } 5488 break; 5489 5490 case MotionEvent.ACTION_POINTER_DOWN: 5491 case MotionEvent.ACTION_POINTER_UP: 5492 // Handle multi-point gestures. Keep min and max offset positions. 5493 // Only activated for devices that correctly handle multi-touch. 5494 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5495 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5496 updateMinAndMaxOffsets(event); 5497 } 5498 break; 5499 5500 case MotionEvent.ACTION_MOVE: 5501 final ViewConfiguration viewConfig = ViewConfiguration.get( 5502 mTextView.getContext()); 5503 final int touchSlop = viewConfig.getScaledTouchSlop(); 5504 5505 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5506 final float deltaX = eventX - mDownPositionX; 5507 final float deltaY = eventY - mDownPositionY; 5508 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5509 5510 if (mGestureStayedInTapRegion) { 5511 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5512 mGestureStayedInTapRegion = 5513 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5514 } 5515 if (mHaventMovedEnoughToStartDrag) { 5516 // We don't start dragging until the user has moved enough. 5517 mHaventMovedEnoughToStartDrag = 5518 distanceSquared <= touchSlop * touchSlop; 5519 } 5520 } 5521 5522 if (isMouse && !isDragAcceleratorActive()) { 5523 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5524 if (mTextView.hasSelection() 5525 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5526 && offset >= mTextView.getSelectionStart() 5527 && offset <= mTextView.getSelectionEnd()) { 5528 startDragAndDrop(); 5529 break; 5530 } 5531 5532 if (mStartOffset != offset) { 5533 // Start character based drag accelerator. 5534 stopTextActionMode(); 5535 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5536 mDiscardNextActionUp = true; 5537 mHaventMovedEnoughToStartDrag = false; 5538 } 5539 } 5540 5541 if (mStartHandle != null && mStartHandle.isShowing()) { 5542 // Don't do the drag if the handles are showing already. 5543 break; 5544 } 5545 5546 updateSelection(event); 5547 break; 5548 5549 case MotionEvent.ACTION_UP: 5550 if (!isDragAcceleratorActive()) { 5551 break; 5552 } 5553 updateSelection(event); 5554 5555 // No longer dragging to select text, let the parent intercept events. 5556 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5557 5558 // No longer the first dragging motion, reset. 5559 resetDragAcceleratorState(); 5560 5561 if (mTextView.hasSelection()) { 5562 // Drag selection should not be adjusted by the text classifier. 5563 startSelectionActionModeAsync(mHaventMovedEnoughToStartDrag); 5564 } 5565 break; 5566 } 5567 } 5568 5569 private void updateSelection(MotionEvent event) { 5570 if (mTextView.getLayout() != null) { 5571 switch (mDragAcceleratorMode) { 5572 case DRAG_ACCELERATOR_MODE_CHARACTER: 5573 updateCharacterBasedSelection(event); 5574 break; 5575 case DRAG_ACCELERATOR_MODE_WORD: 5576 updateWordBasedSelection(event); 5577 break; 5578 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5579 updateParagraphBasedSelection(event); 5580 break; 5581 } 5582 } 5583 } 5584 5585 /** 5586 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5587 * 5588 * @return true if the drag was started. 5589 */ 5590 private boolean selectCurrentParagraphAndStartDrag() { 5591 if (mInsertionActionModeRunnable != null) { 5592 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5593 } 5594 stopTextActionMode(); 5595 if (!selectCurrentParagraph()) { 5596 return false; 5597 } 5598 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5599 return true; 5600 } 5601 5602 private void updateCharacterBasedSelection(MotionEvent event) { 5603 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5604 updateSelectionInternal(mStartOffset, offset, 5605 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5606 } 5607 5608 private void updateWordBasedSelection(MotionEvent event) { 5609 if (mHaventMovedEnoughToStartDrag) { 5610 return; 5611 } 5612 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5613 final ViewConfiguration viewConfig = ViewConfiguration.get( 5614 mTextView.getContext()); 5615 final float eventX = event.getX(); 5616 final float eventY = event.getY(); 5617 final int currLine; 5618 if (isMouse) { 5619 // No need to offset the y coordinate for mouse input. 5620 currLine = mTextView.getLineAtCoordinate(eventY); 5621 } else { 5622 float y = eventY; 5623 if (mSwitchedLines) { 5624 // Offset the finger by the same vertical offset as the handles. 5625 // This improves visibility of the content being selected by 5626 // shifting the finger below the content, this is applied once 5627 // the user has switched lines. 5628 final int touchSlop = viewConfig.getScaledTouchSlop(); 5629 final float fingerOffset = (mStartHandle != null) 5630 ? mStartHandle.getIdealVerticalOffset() 5631 : touchSlop; 5632 y = eventY - fingerOffset; 5633 } 5634 5635 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5636 y); 5637 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5638 // Break early here, we want to offset the finger position from 5639 // the selection highlight, once the user moved their finger 5640 // to a different line we should apply the offset and *not* switch 5641 // lines until recomputing the position with the finger offset. 5642 mSwitchedLines = true; 5643 return; 5644 } 5645 } 5646 5647 int startOffset; 5648 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5649 // Snap to word boundaries. 5650 if (mStartOffset < offset) { 5651 // Expanding with end handle. 5652 offset = getWordEnd(offset); 5653 startOffset = getWordStart(mStartOffset); 5654 } else { 5655 // Expanding with start handle. 5656 offset = getWordStart(offset); 5657 startOffset = getWordEnd(mStartOffset); 5658 if (startOffset == offset) { 5659 offset = getNextCursorOffset(offset, false); 5660 } 5661 } 5662 mLineSelectionIsOn = currLine; 5663 updateSelectionInternal(startOffset, offset, 5664 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5665 } 5666 5667 private void updateParagraphBasedSelection(MotionEvent event) { 5668 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5669 5670 final int start = Math.min(offset, mStartOffset); 5671 final int end = Math.max(offset, mStartOffset); 5672 final long paragraphsRange = getParagraphsRange(start, end); 5673 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5674 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5675 updateSelectionInternal(selectionStart, selectionEnd, 5676 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5677 } 5678 5679 private void updateSelectionInternal(int selectionStart, int selectionEnd, 5680 boolean fromTouchScreen) { 5681 final boolean performHapticFeedback = fromTouchScreen && mHapticTextHandleEnabled 5682 && ((mTextView.getSelectionStart() != selectionStart) 5683 || (mTextView.getSelectionEnd() != selectionEnd)); 5684 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5685 if (performHapticFeedback) { 5686 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 5687 } 5688 } 5689 5690 /** 5691 * @param event 5692 */ 5693 private void updateMinAndMaxOffsets(MotionEvent event) { 5694 int pointerCount = event.getPointerCount(); 5695 for (int index = 0; index < pointerCount; index++) { 5696 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5697 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5698 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5699 } 5700 } 5701 5702 public int getMinTouchOffset() { 5703 return mMinTouchOffset; 5704 } 5705 5706 public int getMaxTouchOffset() { 5707 return mMaxTouchOffset; 5708 } 5709 5710 public void resetTouchOffsets() { 5711 mMinTouchOffset = mMaxTouchOffset = -1; 5712 resetDragAcceleratorState(); 5713 } 5714 5715 private void resetDragAcceleratorState() { 5716 mStartOffset = -1; 5717 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5718 mSwitchedLines = false; 5719 final int selectionStart = mTextView.getSelectionStart(); 5720 final int selectionEnd = mTextView.getSelectionEnd(); 5721 if (selectionStart > selectionEnd) { 5722 Selection.setSelection((Spannable) mTextView.getText(), 5723 selectionEnd, selectionStart); 5724 } 5725 } 5726 5727 /** 5728 * @return true iff this controller is currently used to move the selection start. 5729 */ 5730 public boolean isSelectionStartDragged() { 5731 return mStartHandle != null && mStartHandle.isDragging(); 5732 } 5733 5734 @Override 5735 public boolean isCursorBeingModified() { 5736 return isDragAcceleratorActive() || isSelectionStartDragged() 5737 || (mEndHandle != null && mEndHandle.isDragging()); 5738 } 5739 5740 /** 5741 * @return true if the user is selecting text using the drag accelerator. 5742 */ 5743 public boolean isDragAcceleratorActive() { 5744 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5745 } 5746 5747 public void onTouchModeChanged(boolean isInTouchMode) { 5748 if (!isInTouchMode) { 5749 hide(); 5750 } 5751 } 5752 5753 @Override 5754 public void onDetached() { 5755 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5756 observer.removeOnTouchModeChangeListener(this); 5757 5758 if (mStartHandle != null) mStartHandle.onDetached(); 5759 if (mEndHandle != null) mEndHandle.onDetached(); 5760 } 5761 5762 @Override 5763 public boolean isActive() { 5764 return mStartHandle != null && mStartHandle.isShowing(); 5765 } 5766 5767 public void invalidateHandles() { 5768 if (mStartHandle != null) { 5769 mStartHandle.invalidate(); 5770 } 5771 if (mEndHandle != null) { 5772 mEndHandle.invalidate(); 5773 } 5774 } 5775 } 5776 5777 private class CorrectionHighlighter { 5778 private final Path mPath = new Path(); 5779 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5780 private int mStart, mEnd; 5781 private long mFadingStartTime; 5782 private RectF mTempRectF; 5783 private static final int FADE_OUT_DURATION = 400; 5784 5785 public CorrectionHighlighter() { 5786 mPaint.setCompatibilityScaling( 5787 mTextView.getResources().getCompatibilityInfo().applicationScale); 5788 mPaint.setStyle(Paint.Style.FILL); 5789 } 5790 5791 public void highlight(CorrectionInfo info) { 5792 mStart = info.getOffset(); 5793 mEnd = mStart + info.getNewText().length(); 5794 mFadingStartTime = SystemClock.uptimeMillis(); 5795 5796 if (mStart < 0 || mEnd < 0) { 5797 stopAnimation(); 5798 } 5799 } 5800 5801 public void draw(Canvas canvas, int cursorOffsetVertical) { 5802 if (updatePath() && updatePaint()) { 5803 if (cursorOffsetVertical != 0) { 5804 canvas.translate(0, cursorOffsetVertical); 5805 } 5806 5807 canvas.drawPath(mPath, mPaint); 5808 5809 if (cursorOffsetVertical != 0) { 5810 canvas.translate(0, -cursorOffsetVertical); 5811 } 5812 invalidate(true); // TODO invalidate cursor region only 5813 } else { 5814 stopAnimation(); 5815 invalidate(false); // TODO invalidate cursor region only 5816 } 5817 } 5818 5819 private boolean updatePaint() { 5820 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5821 if (duration > FADE_OUT_DURATION) return false; 5822 5823 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5824 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5825 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5826 + ((int) (highlightColorAlpha * coef) << 24); 5827 mPaint.setColor(color); 5828 return true; 5829 } 5830 5831 private boolean updatePath() { 5832 final Layout layout = mTextView.getLayout(); 5833 if (layout == null) return false; 5834 5835 // Update in case text is edited while the animation is run 5836 final int length = mTextView.getText().length(); 5837 int start = Math.min(length, mStart); 5838 int end = Math.min(length, mEnd); 5839 5840 mPath.reset(); 5841 layout.getSelectionPath(start, end, mPath); 5842 return true; 5843 } 5844 5845 private void invalidate(boolean delayed) { 5846 if (mTextView.getLayout() == null) return; 5847 5848 if (mTempRectF == null) mTempRectF = new RectF(); 5849 mPath.computeBounds(mTempRectF, false); 5850 5851 int left = mTextView.getCompoundPaddingLeft(); 5852 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5853 5854 if (delayed) { 5855 mTextView.postInvalidateOnAnimation( 5856 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5857 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5858 } else { 5859 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5860 (int) mTempRectF.right, (int) mTempRectF.bottom); 5861 } 5862 } 5863 5864 private void stopAnimation() { 5865 Editor.this.mCorrectionHighlighter = null; 5866 } 5867 } 5868 5869 private static class ErrorPopup extends PopupWindow { 5870 private boolean mAbove = false; 5871 private final TextView mView; 5872 private int mPopupInlineErrorBackgroundId = 0; 5873 private int mPopupInlineErrorAboveBackgroundId = 0; 5874 5875 ErrorPopup(TextView v, int width, int height) { 5876 super(v, width, height); 5877 mView = v; 5878 // Make sure the TextView has a background set as it will be used the first time it is 5879 // shown and positioned. Initialized with below background, which should have 5880 // dimensions identical to the above version for this to work (and is more likely). 5881 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5882 com.android.internal.R.styleable.Theme_errorMessageBackground); 5883 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5884 } 5885 5886 void fixDirection(boolean above) { 5887 mAbove = above; 5888 5889 if (above) { 5890 mPopupInlineErrorAboveBackgroundId = 5891 getResourceId(mPopupInlineErrorAboveBackgroundId, 5892 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5893 } else { 5894 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5895 com.android.internal.R.styleable.Theme_errorMessageBackground); 5896 } 5897 5898 mView.setBackgroundResource( 5899 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 5900 } 5901 5902 private int getResourceId(int currentId, int index) { 5903 if (currentId == 0) { 5904 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5905 R.styleable.Theme); 5906 currentId = styledAttributes.getResourceId(index, 0); 5907 styledAttributes.recycle(); 5908 } 5909 return currentId; 5910 } 5911 5912 @Override 5913 public void update(int x, int y, int w, int h, boolean force) { 5914 super.update(x, y, w, h, force); 5915 5916 boolean above = isAboveAnchor(); 5917 if (above != mAbove) { 5918 fixDirection(above); 5919 } 5920 } 5921 } 5922 5923 static class InputContentType { 5924 int imeOptions = EditorInfo.IME_NULL; 5925 String privateImeOptions; 5926 CharSequence imeActionLabel; 5927 int imeActionId; 5928 Bundle extras; 5929 OnEditorActionListener onEditorActionListener; 5930 boolean enterDown; 5931 LocaleList imeHintLocales; 5932 } 5933 5934 static class InputMethodState { 5935 ExtractedTextRequest mExtractedTextRequest; 5936 final ExtractedText mExtractedText = new ExtractedText(); 5937 int mBatchEditNesting; 5938 boolean mCursorChanged; 5939 boolean mSelectionModeChanged; 5940 boolean mContentChanged; 5941 int mChangedStart, mChangedEnd, mChangedDelta; 5942 } 5943 5944 /** 5945 * @return True iff (start, end) is a valid range within the text. 5946 */ 5947 private static boolean isValidRange(CharSequence text, int start, int end) { 5948 return 0 <= start && start <= end && end <= text.length(); 5949 } 5950 5951 @VisibleForTesting 5952 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5953 return mSuggestionsPopupWindow; 5954 } 5955 5956 /** 5957 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5958 * text being typed (and hence always returns null from the filter() method). 5959 * 5960 * TODO: Make this span aware. 5961 */ 5962 public static class UndoInputFilter implements InputFilter { 5963 private final Editor mEditor; 5964 5965 // Whether the current filter pass is directly caused by an end-user text edit. 5966 private boolean mIsUserEdit; 5967 5968 // Whether the text field is handling an IME composition. Must be parceled in case the user 5969 // rotates the screen during composition. 5970 private boolean mHasComposition; 5971 5972 // Whether the user is expanding or shortening the text 5973 private boolean mExpanding; 5974 5975 // Whether the previous edit operation was in the current batch edit. 5976 private boolean mPreviousOperationWasInSameBatchEdit; 5977 5978 public UndoInputFilter(Editor editor) { 5979 mEditor = editor; 5980 } 5981 5982 public void saveInstanceState(Parcel parcel) { 5983 parcel.writeInt(mIsUserEdit ? 1 : 0); 5984 parcel.writeInt(mHasComposition ? 1 : 0); 5985 parcel.writeInt(mExpanding ? 1 : 0); 5986 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 5987 } 5988 5989 public void restoreInstanceState(Parcel parcel) { 5990 mIsUserEdit = parcel.readInt() != 0; 5991 mHasComposition = parcel.readInt() != 0; 5992 mExpanding = parcel.readInt() != 0; 5993 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 5994 } 5995 5996 /** 5997 * Signals that a user-triggered edit is starting. 5998 */ 5999 public void beginBatchEdit() { 6000 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 6001 mIsUserEdit = true; 6002 } 6003 6004 public void endBatchEdit() { 6005 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 6006 mIsUserEdit = false; 6007 mPreviousOperationWasInSameBatchEdit = false; 6008 } 6009 6010 @Override 6011 public CharSequence filter(CharSequence source, int start, int end, 6012 Spanned dest, int dstart, int dend) { 6013 if (DEBUG_UNDO) { 6014 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 6015 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 6016 } 6017 6018 // Check to see if this edit should be tracked for undo. 6019 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 6020 return null; 6021 } 6022 6023 final boolean hadComposition = mHasComposition; 6024 mHasComposition = isComposition(source); 6025 final boolean wasExpanding = mExpanding; 6026 boolean shouldCreateSeparateState = false; 6027 if ((end - start) != (dend - dstart)) { 6028 mExpanding = (end - start) > (dend - dstart); 6029 if (hadComposition && mExpanding != wasExpanding) { 6030 shouldCreateSeparateState = true; 6031 } 6032 } 6033 6034 // Handle edit. 6035 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 6036 return null; 6037 } 6038 6039 void freezeLastEdit() { 6040 mEditor.mUndoManager.beginUpdate("Edit text"); 6041 EditOperation lastEdit = getLastEdit(); 6042 if (lastEdit != null) { 6043 lastEdit.mFrozen = true; 6044 } 6045 mEditor.mUndoManager.endUpdate(); 6046 } 6047 6048 @Retention(RetentionPolicy.SOURCE) 6049 @IntDef({MERGE_EDIT_MODE_FORCE_MERGE, MERGE_EDIT_MODE_NEVER_MERGE, MERGE_EDIT_MODE_NORMAL}) 6050 private @interface MergeMode {} 6051 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 6052 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 6053 /** Use {@link EditOperation#mergeWith} to merge */ 6054 private static final int MERGE_EDIT_MODE_NORMAL = 2; 6055 6056 private void handleEdit(CharSequence source, int start, int end, 6057 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 6058 // An application may install a TextWatcher to provide additional modifications after 6059 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 6060 // string). This results in multiple filter() calls for what the user considers to be 6061 // a single operation. Always undo the whole set of changes in one step. 6062 @MergeMode 6063 final int mergeMode; 6064 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 6065 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 6066 } else if (shouldCreateSeparateState) { 6067 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 6068 } else { 6069 mergeMode = MERGE_EDIT_MODE_NORMAL; 6070 } 6071 // Build a new operation with all the information from this edit. 6072 String newText = TextUtils.substring(source, start, end); 6073 String oldText = TextUtils.substring(dest, dstart, dend); 6074 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 6075 mHasComposition); 6076 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 6077 return; 6078 } 6079 recordEdit(edit, mergeMode); 6080 } 6081 6082 private EditOperation getLastEdit() { 6083 final UndoManager um = mEditor.mUndoManager; 6084 return um.getLastOperation( 6085 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 6086 } 6087 /** 6088 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 6089 * If forceMerge is true then the new edit is always merged. 6090 */ 6091 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 6092 // Fetch the last edit operation and attempt to merge in the new edit. 6093 final UndoManager um = mEditor.mUndoManager; 6094 um.beginUpdate("Edit text"); 6095 EditOperation lastEdit = getLastEdit(); 6096 if (lastEdit == null) { 6097 // Add this as the first edit. 6098 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 6099 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6100 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 6101 // Forced merges take priority because they could be the result of a non-user-edit 6102 // change and this case should not create a new undo operation. 6103 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 6104 lastEdit.forceMergeWith(edit); 6105 } else if (!mIsUserEdit) { 6106 // An application directly modified the Editable outside of a text edit. Treat this 6107 // as a new change and don't attempt to merge. 6108 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 6109 um.commitState(mEditor.mUndoOwner); 6110 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6111 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 6112 // Merge succeeded, nothing else to do. 6113 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 6114 } else { 6115 // Could not merge with the last edit, so commit the last edit and add this edit. 6116 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 6117 um.commitState(mEditor.mUndoOwner); 6118 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6119 } 6120 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 6121 um.endUpdate(); 6122 } 6123 6124 private boolean canUndoEdit(CharSequence source, int start, int end, 6125 Spanned dest, int dstart, int dend) { 6126 if (!mEditor.mAllowUndo) { 6127 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 6128 return false; 6129 } 6130 6131 if (mEditor.mUndoManager.isInUndo()) { 6132 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 6133 return false; 6134 } 6135 6136 // Text filters run before input operations are applied. However, some input operations 6137 // are invalid and will throw exceptions when applied. This is common in tests. Don't 6138 // attempt to undo invalid operations. 6139 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 6140 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 6141 return false; 6142 } 6143 6144 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 6145 // on an input field. Skip no-op changes. 6146 if (start == end && dstart == dend) { 6147 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 6148 return false; 6149 } 6150 6151 return true; 6152 } 6153 6154 private static boolean isComposition(CharSequence source) { 6155 if (!(source instanceof Spannable)) { 6156 return false; 6157 } 6158 // This is a composition edit if the source has a non-zero-length composing span. 6159 Spannable text = (Spannable) source; 6160 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6161 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6162 return composeBegin < composeEnd; 6163 } 6164 6165 private boolean isInTextWatcher() { 6166 CharSequence text = mEditor.mTextView.getText(); 6167 return (text instanceof SpannableStringBuilder) 6168 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6169 } 6170 } 6171 6172 /** 6173 * An operation to undo a single "edit" to a text view. 6174 */ 6175 public static class EditOperation extends UndoOperation<Editor> { 6176 private static final int TYPE_INSERT = 0; 6177 private static final int TYPE_DELETE = 1; 6178 private static final int TYPE_REPLACE = 2; 6179 6180 private int mType; 6181 private String mOldText; 6182 private String mNewText; 6183 private int mStart; 6184 6185 private int mOldCursorPos; 6186 private int mNewCursorPos; 6187 private boolean mFrozen; 6188 private boolean mIsComposition; 6189 6190 /** 6191 * Constructs an edit operation from a text input operation on editor that replaces the 6192 * oldText starting at dstart with newText. 6193 */ 6194 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6195 boolean isComposition) { 6196 super(editor.mUndoOwner); 6197 mOldText = oldText; 6198 mNewText = newText; 6199 6200 // Determine the type of the edit. 6201 if (mNewText.length() > 0 && mOldText.length() == 0) { 6202 mType = TYPE_INSERT; 6203 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6204 mType = TYPE_DELETE; 6205 } else { 6206 mType = TYPE_REPLACE; 6207 } 6208 6209 mStart = dstart; 6210 // Store cursor data. 6211 mOldCursorPos = editor.mTextView.getSelectionStart(); 6212 mNewCursorPos = dstart + mNewText.length(); 6213 mIsComposition = isComposition; 6214 } 6215 6216 public EditOperation(Parcel src, ClassLoader loader) { 6217 super(src, loader); 6218 mType = src.readInt(); 6219 mOldText = src.readString(); 6220 mNewText = src.readString(); 6221 mStart = src.readInt(); 6222 mOldCursorPos = src.readInt(); 6223 mNewCursorPos = src.readInt(); 6224 mFrozen = src.readInt() == 1; 6225 mIsComposition = src.readInt() == 1; 6226 } 6227 6228 @Override 6229 public void writeToParcel(Parcel dest, int flags) { 6230 dest.writeInt(mType); 6231 dest.writeString(mOldText); 6232 dest.writeString(mNewText); 6233 dest.writeInt(mStart); 6234 dest.writeInt(mOldCursorPos); 6235 dest.writeInt(mNewCursorPos); 6236 dest.writeInt(mFrozen ? 1 : 0); 6237 dest.writeInt(mIsComposition ? 1 : 0); 6238 } 6239 6240 private int getNewTextEnd() { 6241 return mStart + mNewText.length(); 6242 } 6243 6244 private int getOldTextEnd() { 6245 return mStart + mOldText.length(); 6246 } 6247 6248 @Override 6249 public void commit() { 6250 } 6251 6252 @Override 6253 public void undo() { 6254 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6255 // Remove the new text and insert the old. 6256 Editor editor = getOwnerData(); 6257 Editable text = (Editable) editor.mTextView.getText(); 6258 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6259 } 6260 6261 @Override 6262 public void redo() { 6263 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6264 // Remove the old text and insert the new. 6265 Editor editor = getOwnerData(); 6266 Editable text = (Editable) editor.mTextView.getText(); 6267 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6268 } 6269 6270 /** 6271 * Attempts to merge this existing operation with a new edit. 6272 * @param edit The new edit operation. 6273 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6274 * object unchanged. 6275 */ 6276 private boolean mergeWith(EditOperation edit) { 6277 if (DEBUG_UNDO) { 6278 Log.d(TAG, "mergeWith old " + this); 6279 Log.d(TAG, "mergeWith new " + edit); 6280 } 6281 6282 if (mFrozen) { 6283 return false; 6284 } 6285 6286 switch (mType) { 6287 case TYPE_INSERT: 6288 return mergeInsertWith(edit); 6289 case TYPE_DELETE: 6290 return mergeDeleteWith(edit); 6291 case TYPE_REPLACE: 6292 return mergeReplaceWith(edit); 6293 default: 6294 return false; 6295 } 6296 } 6297 6298 private boolean mergeInsertWith(EditOperation edit) { 6299 if (edit.mType == TYPE_INSERT) { 6300 // Merge insertions that are contiguous even when it's frozen. 6301 if (getNewTextEnd() != edit.mStart) { 6302 return false; 6303 } 6304 mNewText += edit.mNewText; 6305 mNewCursorPos = edit.mNewCursorPos; 6306 mFrozen = edit.mFrozen; 6307 mIsComposition = edit.mIsComposition; 6308 return true; 6309 } 6310 if (mIsComposition && edit.mType == TYPE_REPLACE 6311 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6312 // Merge insertion with replace as they can be single insertion. 6313 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6314 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6315 mNewCursorPos = edit.mNewCursorPos; 6316 mIsComposition = edit.mIsComposition; 6317 return true; 6318 } 6319 return false; 6320 } 6321 6322 // TODO: Support forward delete. 6323 private boolean mergeDeleteWith(EditOperation edit) { 6324 // Only merge continuous deletes. 6325 if (edit.mType != TYPE_DELETE) { 6326 return false; 6327 } 6328 // Only merge deletions that are contiguous. 6329 if (mStart != edit.getOldTextEnd()) { 6330 return false; 6331 } 6332 mStart = edit.mStart; 6333 mOldText = edit.mOldText + mOldText; 6334 mNewCursorPos = edit.mNewCursorPos; 6335 mIsComposition = edit.mIsComposition; 6336 return true; 6337 } 6338 6339 private boolean mergeReplaceWith(EditOperation edit) { 6340 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6341 // Merge with adjacent insert. 6342 mNewText += edit.mNewText; 6343 mNewCursorPos = edit.mNewCursorPos; 6344 return true; 6345 } 6346 if (!mIsComposition) { 6347 return false; 6348 } 6349 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6350 && getNewTextEnd() >= edit.getOldTextEnd()) { 6351 // Merge with delete as they can be single operation. 6352 mNewText = mNewText.substring(0, edit.mStart - mStart) 6353 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6354 if (mNewText.isEmpty()) { 6355 mType = TYPE_DELETE; 6356 } 6357 mNewCursorPos = edit.mNewCursorPos; 6358 mIsComposition = edit.mIsComposition; 6359 return true; 6360 } 6361 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6362 && TextUtils.equals(mNewText, edit.mOldText)) { 6363 // Merge with the replace that replaces the same region. 6364 mNewText = edit.mNewText; 6365 mNewCursorPos = edit.mNewCursorPos; 6366 mIsComposition = edit.mIsComposition; 6367 return true; 6368 } 6369 return false; 6370 } 6371 6372 /** 6373 * Forcibly creates a single merged edit operation by simulating the entire text 6374 * contents being replaced. 6375 */ 6376 public void forceMergeWith(EditOperation edit) { 6377 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6378 if (mergeWith(edit)) { 6379 return; 6380 } 6381 Editor editor = getOwnerData(); 6382 6383 // Copy the text of the current field. 6384 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6385 // but would require two parallel implementations of modifyText() because Editable and 6386 // StringBuilder do not share an interface for replace/delete/insert. 6387 Editable editable = (Editable) editor.mTextView.getText(); 6388 Editable originalText = new SpannableStringBuilder(editable.toString()); 6389 6390 // Roll back the last operation. 6391 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6392 6393 // Clone the text again and apply the new operation. 6394 Editable finalText = new SpannableStringBuilder(editable.toString()); 6395 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6396 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6397 6398 // Convert this operation into a replace operation. 6399 mType = TYPE_REPLACE; 6400 mNewText = finalText.toString(); 6401 mOldText = originalText.toString(); 6402 mStart = 0; 6403 mNewCursorPos = edit.mNewCursorPos; 6404 mIsComposition = edit.mIsComposition; 6405 // mOldCursorPos is unchanged. 6406 } 6407 6408 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6409 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6410 // Apply the edit if it is still valid. 6411 if (isValidRange(text, deleteFrom, deleteTo) 6412 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6413 if (deleteFrom != deleteTo) { 6414 text.delete(deleteFrom, deleteTo); 6415 } 6416 if (newText.length() != 0) { 6417 text.insert(newTextInsertAt, newText); 6418 } 6419 } 6420 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6421 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6422 // TODO: Select all the text that was undone. 6423 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6424 Selection.setSelection(text, newCursorPos); 6425 } 6426 } 6427 6428 private String getTypeString() { 6429 switch (mType) { 6430 case TYPE_INSERT: 6431 return "insert"; 6432 case TYPE_DELETE: 6433 return "delete"; 6434 case TYPE_REPLACE: 6435 return "replace"; 6436 default: 6437 return ""; 6438 } 6439 } 6440 6441 @Override 6442 public String toString() { 6443 return "[mType=" + getTypeString() + ", " 6444 + "mOldText=" + mOldText + ", " 6445 + "mNewText=" + mNewText + ", " 6446 + "mStart=" + mStart + ", " 6447 + "mOldCursorPos=" + mOldCursorPos + ", " 6448 + "mNewCursorPos=" + mNewCursorPos + ", " 6449 + "mFrozen=" + mFrozen + ", " 6450 + "mIsComposition=" + mIsComposition + "]"; 6451 } 6452 6453 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6454 new Parcelable.ClassLoaderCreator<EditOperation>() { 6455 @Override 6456 public EditOperation createFromParcel(Parcel in) { 6457 return new EditOperation(in, null); 6458 } 6459 6460 @Override 6461 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6462 return new EditOperation(in, loader); 6463 } 6464 6465 @Override 6466 public EditOperation[] newArray(int size) { 6467 return new EditOperation[size]; 6468 } 6469 }; 6470 } 6471 6472 /** 6473 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6474 * These allow external applications to plug into currently selected text. 6475 */ 6476 static final class ProcessTextIntentActionsHandler { 6477 6478 private final Editor mEditor; 6479 private final TextView mTextView; 6480 private final Context mContext; 6481 private final PackageManager mPackageManager; 6482 private final String mPackageName; 6483 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6484 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6485 new SparseArray<>(); 6486 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6487 6488 private ProcessTextIntentActionsHandler(Editor editor) { 6489 mEditor = Preconditions.checkNotNull(editor); 6490 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6491 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6492 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6493 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6494 } 6495 6496 /** 6497 * Adds "PROCESS_TEXT" menu items to the specified menu. 6498 */ 6499 public void onInitializeMenu(Menu menu) { 6500 final int size = mSupportedActivities.size(); 6501 loadSupportedActivities(); 6502 for (int i = 0; i < size; i++) { 6503 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6504 menu.add(Menu.NONE, Menu.NONE, 6505 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 6506 getLabel(resolveInfo)) 6507 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6508 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 6509 } 6510 } 6511 6512 /** 6513 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6514 * menu item. 6515 * 6516 * @return True if the action was performed, false otherwise. 6517 */ 6518 public boolean performMenuItemAction(MenuItem item) { 6519 return fireIntent(item.getIntent()); 6520 } 6521 6522 /** 6523 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6524 */ 6525 public void initializeAccessibilityActions() { 6526 mAccessibilityIntents.clear(); 6527 mAccessibilityActions.clear(); 6528 int i = 0; 6529 loadSupportedActivities(); 6530 for (ResolveInfo resolveInfo : mSupportedActivities) { 6531 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6532 mAccessibilityActions.put( 6533 actionId, 6534 new AccessibilityNodeInfo.AccessibilityAction( 6535 actionId, getLabel(resolveInfo))); 6536 mAccessibilityIntents.put( 6537 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6538 } 6539 } 6540 6541 /** 6542 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6543 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6544 * latest accessibility actions available for this call. 6545 */ 6546 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6547 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6548 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6549 } 6550 } 6551 6552 /** 6553 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6554 * accessibility action id. 6555 * 6556 * @return True if the action was performed, false otherwise. 6557 */ 6558 public boolean performAccessibilityAction(int actionId) { 6559 return fireIntent(mAccessibilityIntents.get(actionId)); 6560 } 6561 6562 private boolean fireIntent(Intent intent) { 6563 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6564 String selectedText = mTextView.getSelectedText(); 6565 selectedText = TextUtils.trimToParcelableSize(selectedText); 6566 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, selectedText); 6567 mEditor.mPreserveSelection = true; 6568 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6569 return true; 6570 } 6571 return false; 6572 } 6573 6574 private void loadSupportedActivities() { 6575 mSupportedActivities.clear(); 6576 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6577 List<ResolveInfo> unfiltered = 6578 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6579 for (ResolveInfo info : unfiltered) { 6580 if (isSupportedActivity(info)) { 6581 mSupportedActivities.add(info); 6582 } 6583 } 6584 } 6585 6586 private boolean isSupportedActivity(ResolveInfo info) { 6587 return mPackageName.equals(info.activityInfo.packageName) 6588 || info.activityInfo.exported 6589 && (info.activityInfo.permission == null 6590 || mContext.checkSelfPermission(info.activityInfo.permission) 6591 == PackageManager.PERMISSION_GRANTED); 6592 } 6593 6594 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6595 return createProcessTextIntent() 6596 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6597 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6598 } 6599 6600 private Intent createProcessTextIntent() { 6601 return new Intent() 6602 .setAction(Intent.ACTION_PROCESS_TEXT) 6603 .setType("text/plain"); 6604 } 6605 6606 private CharSequence getLabel(ResolveInfo resolveInfo) { 6607 return resolveInfo.loadLabel(mPackageManager); 6608 } 6609 } 6610} 6611