Editor.java revision 0d9fbb9bd15fb1c6eae171d316a2de65aaffeb48
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.IntDef; 21import android.annotation.NonNull; 22import android.annotation.Nullable; 23import android.app.PendingIntent; 24import android.app.PendingIntent.CanceledException; 25import android.content.ClipData; 26import android.content.ClipData.Item; 27import android.content.Context; 28import android.content.Intent; 29import android.content.UndoManager; 30import android.content.UndoOperation; 31import android.content.UndoOwner; 32import android.content.pm.PackageManager; 33import android.content.pm.ResolveInfo; 34import android.content.res.TypedArray; 35import android.graphics.Canvas; 36import android.graphics.Color; 37import android.graphics.Matrix; 38import android.graphics.Paint; 39import android.graphics.Path; 40import android.graphics.Rect; 41import android.graphics.RectF; 42import android.graphics.drawable.ColorDrawable; 43import android.graphics.drawable.Drawable; 44import android.os.Bundle; 45import android.os.LocaleList; 46import android.os.Parcel; 47import android.os.Parcelable; 48import android.os.ParcelableParcel; 49import android.os.SystemClock; 50import android.provider.Settings; 51import android.text.DynamicLayout; 52import android.text.Editable; 53import android.text.InputFilter; 54import android.text.InputType; 55import android.text.Layout; 56import android.text.ParcelableSpan; 57import android.text.Selection; 58import android.text.SpanWatcher; 59import android.text.Spannable; 60import android.text.SpannableStringBuilder; 61import android.text.Spanned; 62import android.text.StaticLayout; 63import android.text.TextUtils; 64import android.text.method.KeyListener; 65import android.text.method.MetaKeyKeyListener; 66import android.text.method.MovementMethod; 67import android.text.method.WordIterator; 68import android.text.style.EasyEditSpan; 69import android.text.style.SuggestionRangeSpan; 70import android.text.style.SuggestionSpan; 71import android.text.style.TextAppearanceSpan; 72import android.text.style.URLSpan; 73import android.util.ArraySet; 74import android.util.DisplayMetrics; 75import android.util.Log; 76import android.util.SparseArray; 77import android.view.ActionMode; 78import android.view.ActionMode.Callback; 79import android.view.ContextMenu; 80import android.view.ContextThemeWrapper; 81import android.view.DisplayListCanvas; 82import android.view.DragAndDropPermissions; 83import android.view.DragEvent; 84import android.view.Gravity; 85import android.view.HapticFeedbackConstants; 86import android.view.InputDevice; 87import android.view.LayoutInflater; 88import android.view.Menu; 89import android.view.MenuItem; 90import android.view.MotionEvent; 91import android.view.RenderNode; 92import android.view.SubMenu; 93import android.view.View; 94import android.view.View.DragShadowBuilder; 95import android.view.View.OnClickListener; 96import android.view.ViewConfiguration; 97import android.view.ViewGroup; 98import android.view.ViewGroup.LayoutParams; 99import android.view.ViewTreeObserver; 100import android.view.WindowManager; 101import android.view.accessibility.AccessibilityNodeInfo; 102import android.view.inputmethod.CorrectionInfo; 103import android.view.inputmethod.CursorAnchorInfo; 104import android.view.inputmethod.EditorInfo; 105import android.view.inputmethod.ExtractedText; 106import android.view.inputmethod.ExtractedTextRequest; 107import android.view.inputmethod.InputConnection; 108import android.view.inputmethod.InputMethodManager; 109import android.view.textclassifier.TextClassification; 110import android.view.textclassifier.TextLinks; 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; 122 123import java.lang.annotation.Retention; 124import java.lang.annotation.RetentionPolicy; 125import java.text.BreakIterator; 126import java.util.ArrayList; 127import java.util.Arrays; 128import java.util.Comparator; 129import java.util.HashMap; 130import java.util.List; 131import java.util.Map; 132 133/** 134 * Helper class used by TextView to handle editable text views. 135 * 136 * @hide 137 */ 138public class Editor { 139 private static final String TAG = "Editor"; 140 private static final boolean DEBUG_UNDO = false; 141 // Specifies whether to use or not the magnifier when pressing the insertion or selection 142 // handles. 143 private static final boolean FLAG_USE_MAGNIFIER = true; 144 145 static final int BLINK = 500; 146 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 147 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 148 private static final int UNSET_X_VALUE = -1; 149 private static final int UNSET_LINE = -1; 150 // Tag used when the Editor maintains its own separate UndoManager. 151 private static final String UNDO_OWNER_TAG = "Editor"; 152 153 // Ordering constants used to place the Action Mode or context menu items in their menu. 154 private static final int MENU_ITEM_ORDER_ASSIST = 0; 155 private static final int MENU_ITEM_ORDER_UNDO = 2; 156 private static final int MENU_ITEM_ORDER_REDO = 3; 157 private static final int MENU_ITEM_ORDER_CUT = 4; 158 private static final int MENU_ITEM_ORDER_COPY = 5; 159 private static final int MENU_ITEM_ORDER_PASTE = 6; 160 private static final int MENU_ITEM_ORDER_SHARE = 7; 161 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 162 private static final int MENU_ITEM_ORDER_REPLACE = 9; 163 private static final int MENU_ITEM_ORDER_AUTOFILL = 10; 164 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 11; 165 private static final int MENU_ITEM_ORDER_SECONDARY_ASSIST_ACTIONS_START = 50; 166 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 167 168 @IntDef({MagnifierHandleTrigger.SELECTION_START, 169 MagnifierHandleTrigger.SELECTION_END, 170 MagnifierHandleTrigger.INSERTION}) 171 @Retention(RetentionPolicy.SOURCE) 172 private @interface MagnifierHandleTrigger { 173 int INSERTION = 0; 174 int SELECTION_START = 1; 175 int SELECTION_END = 2; 176 } 177 178 @IntDef({TextActionMode.SELECTION, TextActionMode.INSERTION, TextActionMode.TEXT_LINK}) 179 @interface TextActionMode { 180 int SELECTION = 0; 181 int INSERTION = 1; 182 int TEXT_LINK = 2; 183 } 184 185 // Each Editor manages its own undo stack. 186 private final UndoManager mUndoManager = new UndoManager(); 187 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 188 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 189 boolean mAllowUndo = true; 190 191 private final MetricsLogger mMetricsLogger = new MetricsLogger(); 192 193 // Cursor Controllers. 194 private InsertionPointCursorController mInsertionPointCursorController; 195 SelectionModifierCursorController mSelectionModifierCursorController; 196 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 197 private ActionMode mTextActionMode; 198 private boolean mInsertionControllerEnabled; 199 private boolean mSelectionControllerEnabled; 200 201 private final boolean mHapticTextHandleEnabled; 202 203 private final Magnifier mMagnifier; 204 private final Runnable mUpdateMagnifierRunnable = new Runnable() { 205 @Override 206 public void run() { 207 mMagnifier.update(); 208 } 209 }; 210 // Update the magnifier contents whenever anything in the view hierarchy is updated. 211 // Note: this only captures UI thread-visible changes, so it's a known issue that an animating 212 // VectorDrawable or Ripple animation will not trigger capture, since they're owned by 213 // RenderThread. 214 private final ViewTreeObserver.OnDrawListener mMagnifierOnDrawListener = 215 new ViewTreeObserver.OnDrawListener() { 216 @Override 217 public void onDraw() { 218 if (mMagnifier != null) { 219 // Posting the method will ensure that updating the magnifier contents will 220 // happen right after the rendering of the current frame. 221 mTextView.post(mUpdateMagnifierRunnable); 222 } 223 } 224 }; 225 226 // Used to highlight a word when it is corrected by the IME 227 private CorrectionHighlighter mCorrectionHighlighter; 228 229 InputContentType mInputContentType; 230 InputMethodState mInputMethodState; 231 232 private static class TextRenderNode { 233 // Render node has 3 recording states: 234 // 1. Recorded operations are valid. 235 // #needsRecord() returns false, but needsToBeShifted is false. 236 // 2. Recorded operations are not valid, but just the position needed to be updated. 237 // #needsRecord() returns false, but needsToBeShifted is true. 238 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 239 // true. 240 RenderNode renderNode; 241 boolean isDirty; 242 // Becomes true when recorded operations can be reused, but the position has to be updated. 243 boolean needsToBeShifted; 244 public TextRenderNode(String name) { 245 renderNode = RenderNode.create(name, null); 246 isDirty = true; 247 needsToBeShifted = true; 248 } 249 boolean needsRecord() { 250 return isDirty || !renderNode.isValid(); 251 } 252 } 253 private TextRenderNode[] mTextRenderNodes; 254 255 boolean mFrozenWithFocus; 256 boolean mSelectionMoved; 257 boolean mTouchFocusSelected; 258 259 KeyListener mKeyListener; 260 int mInputType = EditorInfo.TYPE_NULL; 261 262 boolean mDiscardNextActionUp; 263 boolean mIgnoreActionUpEvent; 264 265 long mShowCursor; 266 private Blink mBlink; 267 268 boolean mCursorVisible = true; 269 boolean mSelectAllOnFocus; 270 boolean mTextIsSelectable; 271 272 CharSequence mError; 273 boolean mErrorWasChanged; 274 private ErrorPopup mErrorPopup; 275 276 /** 277 * This flag is set if the TextView tries to display an error before it 278 * is attached to the window (so its position is still unknown). 279 * It causes the error to be shown later, when onAttachedToWindow() 280 * is called. 281 */ 282 private boolean mShowErrorAfterAttach; 283 284 boolean mInBatchEditControllers; 285 boolean mShowSoftInputOnFocus = true; 286 private boolean mPreserveSelection; 287 private boolean mRestartActionModeOnNextRefresh; 288 289 private SelectionActionModeHelper mSelectionActionModeHelper; 290 291 boolean mIsBeingLongClicked; 292 293 private SuggestionsPopupWindow mSuggestionsPopupWindow; 294 SuggestionRangeSpan mSuggestionRangeSpan; 295 private Runnable mShowSuggestionRunnable; 296 297 Drawable mDrawableForCursor = null; 298 299 private Drawable mSelectHandleLeft; 300 private Drawable mSelectHandleRight; 301 private Drawable mSelectHandleCenter; 302 303 // Global listener that detects changes in the global position of the TextView 304 private PositionListener mPositionListener; 305 306 private float mLastDownPositionX, mLastDownPositionY; 307 private float mLastUpPositionX, mLastUpPositionY; 308 private float mContextMenuAnchorX, mContextMenuAnchorY; 309 Callback mCustomSelectionActionModeCallback; 310 Callback mCustomInsertionActionModeCallback; 311 312 // Set when this TextView gained focus with some text selected. Will start selection mode. 313 boolean mCreatedWithASelection; 314 315 // Indicates the current tap state (first tap, double tap, or triple click). 316 private int mTapState = TAP_STATE_INITIAL; 317 private long mLastTouchUpTime = 0; 318 private static final int TAP_STATE_INITIAL = 0; 319 private static final int TAP_STATE_FIRST_TAP = 1; 320 private static final int TAP_STATE_DOUBLE_TAP = 2; 321 // Only for mouse input. 322 private static final int TAP_STATE_TRIPLE_CLICK = 3; 323 324 // The button state as of the last time #onTouchEvent is called. 325 private int mLastButtonState; 326 327 private Runnable mInsertionActionModeRunnable; 328 329 // The span controller helps monitoring the changes to which the Editor needs to react: 330 // - EasyEditSpans, for which we have some UI to display on attach and on hide 331 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 332 private SpanController mSpanController; 333 334 private WordIterator mWordIterator; 335 SpellChecker mSpellChecker; 336 337 // This word iterator is set with text and used to determine word boundaries 338 // when a user is selecting text. 339 private WordIterator mWordIteratorWithText; 340 // Indicate that the text in the word iterator needs to be updated. 341 private boolean mUpdateWordIteratorText; 342 343 private Rect mTempRect; 344 345 private final TextView mTextView; 346 347 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 348 349 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 350 new CursorAnchorInfoNotifier(); 351 352 private final Runnable mShowFloatingToolbar = new Runnable() { 353 @Override 354 public void run() { 355 if (mTextActionMode != null) { 356 mTextActionMode.hide(0); // hide off. 357 } 358 } 359 }; 360 361 boolean mIsInsertionActionModeStartPending = false; 362 363 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 364 365 Editor(TextView textView) { 366 mTextView = textView; 367 // Synchronize the filter list, which places the undo input filter at the end. 368 mTextView.setFilters(mTextView.getFilters()); 369 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 370 mHapticTextHandleEnabled = mTextView.getContext().getResources().getBoolean( 371 com.android.internal.R.bool.config_enableHapticTextHandle); 372 373 mMagnifier = FLAG_USE_MAGNIFIER ? new Magnifier(mTextView) : null; 374 } 375 376 ParcelableParcel saveInstanceState() { 377 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 378 Parcel parcel = state.getParcel(); 379 mUndoManager.saveInstanceState(parcel); 380 mUndoInputFilter.saveInstanceState(parcel); 381 return state; 382 } 383 384 void restoreInstanceState(ParcelableParcel state) { 385 Parcel parcel = state.getParcel(); 386 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 387 mUndoInputFilter.restoreInstanceState(parcel); 388 // Re-associate this object as the owner of undo state. 389 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 390 } 391 392 /** 393 * Forgets all undo and redo operations for this Editor. 394 */ 395 void forgetUndoRedo() { 396 UndoOwner[] owners = { mUndoOwner }; 397 mUndoManager.forgetUndos(owners, -1 /* all */); 398 mUndoManager.forgetRedos(owners, -1 /* all */); 399 } 400 401 boolean canUndo() { 402 UndoOwner[] owners = { mUndoOwner }; 403 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 404 } 405 406 boolean canRedo() { 407 UndoOwner[] owners = { mUndoOwner }; 408 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 409 } 410 411 void undo() { 412 if (!mAllowUndo) { 413 return; 414 } 415 UndoOwner[] owners = { mUndoOwner }; 416 mUndoManager.undo(owners, 1); // Undo 1 action. 417 } 418 419 void redo() { 420 if (!mAllowUndo) { 421 return; 422 } 423 UndoOwner[] owners = { mUndoOwner }; 424 mUndoManager.redo(owners, 1); // Redo 1 action. 425 } 426 427 void replace() { 428 if (mSuggestionsPopupWindow == null) { 429 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 430 } 431 hideCursorAndSpanControllers(); 432 mSuggestionsPopupWindow.show(); 433 434 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 435 Selection.setSelection((Spannable) mTextView.getText(), middle); 436 } 437 438 void onAttachedToWindow() { 439 if (mShowErrorAfterAttach) { 440 showError(); 441 mShowErrorAfterAttach = false; 442 } 443 444 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 445 if (observer.isAlive()) { 446 // No need to create the controller. 447 // The get method will add the listener on controller creation. 448 if (mInsertionPointCursorController != null) { 449 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 450 } 451 if (mSelectionModifierCursorController != null) { 452 mSelectionModifierCursorController.resetTouchOffsets(); 453 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 454 } 455 if (FLAG_USE_MAGNIFIER) { 456 observer.addOnDrawListener(mMagnifierOnDrawListener); 457 } 458 } 459 460 updateSpellCheckSpans(0, mTextView.getText().length(), 461 true /* create the spell checker if needed */); 462 463 if (mTextView.hasSelection()) { 464 refreshTextActionMode(); 465 } 466 467 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 468 resumeBlink(); 469 } 470 471 void onDetachedFromWindow() { 472 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 473 474 if (mError != null) { 475 hideError(); 476 } 477 478 suspendBlink(); 479 480 if (mInsertionPointCursorController != null) { 481 mInsertionPointCursorController.onDetached(); 482 } 483 484 if (mSelectionModifierCursorController != null) { 485 mSelectionModifierCursorController.onDetached(); 486 } 487 488 if (mShowSuggestionRunnable != null) { 489 mTextView.removeCallbacks(mShowSuggestionRunnable); 490 } 491 492 // Cancel the single tap delayed runnable. 493 if (mInsertionActionModeRunnable != null) { 494 mTextView.removeCallbacks(mInsertionActionModeRunnable); 495 } 496 497 mTextView.removeCallbacks(mShowFloatingToolbar); 498 499 discardTextDisplayLists(); 500 501 if (mSpellChecker != null) { 502 mSpellChecker.closeSession(); 503 // Forces the creation of a new SpellChecker next time this window is created. 504 // Will handle the cases where the settings has been changed in the meantime. 505 mSpellChecker = null; 506 } 507 508 if (FLAG_USE_MAGNIFIER) { 509 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 510 if (observer.isAlive()) { 511 observer.removeOnDrawListener(mMagnifierOnDrawListener); 512 } 513 } 514 515 hideCursorAndSpanControllers(); 516 stopTextActionModeWithPreservingSelection(); 517 } 518 519 private void discardTextDisplayLists() { 520 if (mTextRenderNodes != null) { 521 for (int i = 0; i < mTextRenderNodes.length; i++) { 522 RenderNode displayList = mTextRenderNodes[i] != null 523 ? mTextRenderNodes[i].renderNode : null; 524 if (displayList != null && displayList.isValid()) { 525 displayList.discardDisplayList(); 526 } 527 } 528 } 529 } 530 531 private void showError() { 532 if (mTextView.getWindowToken() == null) { 533 mShowErrorAfterAttach = true; 534 return; 535 } 536 537 if (mErrorPopup == null) { 538 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 539 final TextView err = (TextView) inflater.inflate( 540 com.android.internal.R.layout.textview_hint, null); 541 542 final float scale = mTextView.getResources().getDisplayMetrics().density; 543 mErrorPopup = 544 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 545 mErrorPopup.setFocusable(false); 546 // The user is entering text, so the input method is needed. We 547 // don't want the popup to be displayed on top of it. 548 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 549 } 550 551 TextView tv = (TextView) mErrorPopup.getContentView(); 552 chooseSize(mErrorPopup, mError, tv); 553 tv.setText(mError); 554 555 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY(), 556 Gravity.TOP | Gravity.LEFT); 557 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 558 } 559 560 public void setError(CharSequence error, Drawable icon) { 561 mError = TextUtils.stringOrSpannedString(error); 562 mErrorWasChanged = true; 563 564 if (mError == null) { 565 setErrorIcon(null); 566 if (mErrorPopup != null) { 567 if (mErrorPopup.isShowing()) { 568 mErrorPopup.dismiss(); 569 } 570 571 mErrorPopup = null; 572 } 573 mShowErrorAfterAttach = false; 574 } else { 575 setErrorIcon(icon); 576 if (mTextView.isFocused()) { 577 showError(); 578 } 579 } 580 } 581 582 private void setErrorIcon(Drawable icon) { 583 Drawables dr = mTextView.mDrawables; 584 if (dr == null) { 585 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 586 } 587 dr.setErrorDrawable(icon, mTextView); 588 589 mTextView.resetResolvedDrawables(); 590 mTextView.invalidate(); 591 mTextView.requestLayout(); 592 } 593 594 private void hideError() { 595 if (mErrorPopup != null) { 596 if (mErrorPopup.isShowing()) { 597 mErrorPopup.dismiss(); 598 } 599 } 600 601 mShowErrorAfterAttach = false; 602 } 603 604 /** 605 * Returns the X offset to make the pointy top of the error point 606 * at the middle of the error icon. 607 */ 608 private int getErrorX() { 609 /* 610 * The "25" is the distance between the point and the right edge 611 * of the background 612 */ 613 final float scale = mTextView.getResources().getDisplayMetrics().density; 614 615 final Drawables dr = mTextView.mDrawables; 616 617 final int layoutDirection = mTextView.getLayoutDirection(); 618 int errorX; 619 int offset; 620 switch (layoutDirection) { 621 default: 622 case View.LAYOUT_DIRECTION_LTR: 623 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 624 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 625 - mTextView.getPaddingRight() + offset; 626 break; 627 case View.LAYOUT_DIRECTION_RTL: 628 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 629 errorX = mTextView.getPaddingLeft() + offset; 630 break; 631 } 632 return errorX; 633 } 634 635 /** 636 * Returns the Y offset to make the pointy top of the error point 637 * at the bottom of the error icon. 638 */ 639 private int getErrorY() { 640 /* 641 * Compound, not extended, because the icon is not clipped 642 * if the text height is smaller. 643 */ 644 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 645 int vspace = mTextView.getBottom() - mTextView.getTop() 646 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 647 648 final Drawables dr = mTextView.mDrawables; 649 650 final int layoutDirection = mTextView.getLayoutDirection(); 651 int height; 652 switch (layoutDirection) { 653 default: 654 case View.LAYOUT_DIRECTION_LTR: 655 height = (dr != null ? dr.mDrawableHeightRight : 0); 656 break; 657 case View.LAYOUT_DIRECTION_RTL: 658 height = (dr != null ? dr.mDrawableHeightLeft : 0); 659 break; 660 } 661 662 int icontop = compoundPaddingTop + (vspace - height) / 2; 663 664 /* 665 * The "2" is the distance between the point and the top edge 666 * of the background. 667 */ 668 final float scale = mTextView.getResources().getDisplayMetrics().density; 669 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 670 } 671 672 void createInputContentTypeIfNeeded() { 673 if (mInputContentType == null) { 674 mInputContentType = new InputContentType(); 675 } 676 } 677 678 void createInputMethodStateIfNeeded() { 679 if (mInputMethodState == null) { 680 mInputMethodState = new InputMethodState(); 681 } 682 } 683 684 boolean isCursorVisible() { 685 // The default value is true, even when there is no associated Editor 686 return mCursorVisible && mTextView.isTextEditable(); 687 } 688 689 void prepareCursorControllers() { 690 boolean windowSupportsHandles = false; 691 692 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 693 if (params instanceof WindowManager.LayoutParams) { 694 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 695 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 696 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 697 } 698 699 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 700 mInsertionControllerEnabled = enabled && isCursorVisible(); 701 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 702 703 if (!mInsertionControllerEnabled) { 704 hideInsertionPointCursorController(); 705 if (mInsertionPointCursorController != null) { 706 mInsertionPointCursorController.onDetached(); 707 mInsertionPointCursorController = null; 708 } 709 } 710 711 if (!mSelectionControllerEnabled) { 712 stopTextActionMode(); 713 if (mSelectionModifierCursorController != null) { 714 mSelectionModifierCursorController.onDetached(); 715 mSelectionModifierCursorController = null; 716 } 717 } 718 } 719 720 void hideInsertionPointCursorController() { 721 if (mInsertionPointCursorController != null) { 722 mInsertionPointCursorController.hide(); 723 } 724 } 725 726 /** 727 * Hides the insertion and span controllers. 728 */ 729 void hideCursorAndSpanControllers() { 730 hideCursorControllers(); 731 hideSpanControllers(); 732 } 733 734 private void hideSpanControllers() { 735 if (mSpanController != null) { 736 mSpanController.hide(); 737 } 738 } 739 740 private void hideCursorControllers() { 741 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 742 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 743 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 744 // to distinguish one from the other. 745 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 746 || !mSuggestionsPopupWindow.isShowingUp())) { 747 // Should be done before hide insertion point controller since it triggers a show of it 748 mSuggestionsPopupWindow.hide(); 749 } 750 hideInsertionPointCursorController(); 751 } 752 753 /** 754 * Create new SpellCheckSpans on the modified region. 755 */ 756 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 757 // Remove spans whose adjacent characters are text not punctuation 758 mTextView.removeAdjacentSuggestionSpans(start); 759 mTextView.removeAdjacentSuggestionSpans(end); 760 761 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 762 && !(mTextView.isInExtractedMode())) { 763 if (mSpellChecker == null && createSpellChecker) { 764 mSpellChecker = new SpellChecker(mTextView); 765 } 766 if (mSpellChecker != null) { 767 mSpellChecker.spellCheck(start, end); 768 } 769 } 770 } 771 772 void onScreenStateChanged(int screenState) { 773 switch (screenState) { 774 case View.SCREEN_STATE_ON: 775 resumeBlink(); 776 break; 777 case View.SCREEN_STATE_OFF: 778 suspendBlink(); 779 break; 780 } 781 } 782 783 private void suspendBlink() { 784 if (mBlink != null) { 785 mBlink.cancel(); 786 } 787 } 788 789 private void resumeBlink() { 790 if (mBlink != null) { 791 mBlink.uncancel(); 792 makeBlink(); 793 } 794 } 795 796 void adjustInputType(boolean password, boolean passwordInputType, 797 boolean webPasswordInputType, boolean numberPasswordInputType) { 798 // mInputType has been set from inputType, possibly modified by mInputMethod. 799 // Specialize mInputType to [web]password if we have a text class and the original input 800 // type was a password. 801 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 802 if (password || passwordInputType) { 803 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 804 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 805 } 806 if (webPasswordInputType) { 807 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 808 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 809 } 810 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 811 if (numberPasswordInputType) { 812 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 813 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 814 } 815 } 816 } 817 818 private void chooseSize(@NonNull PopupWindow pop, @NonNull CharSequence text, 819 @NonNull TextView tv) { 820 final int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 821 final int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 822 823 final int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 824 com.android.internal.R.dimen.textview_error_popup_default_width); 825 final StaticLayout l = StaticLayout.Builder.obtain(text, 0, text.length(), tv.getPaint(), 826 defaultWidthInPixels) 827 .setUseLineSpacingFromFallbacks(tv.mUseFallbackLineSpacing) 828 .build(); 829 830 float max = 0; 831 for (int i = 0; i < l.getLineCount(); i++) { 832 max = Math.max(max, l.getLineWidth(i)); 833 } 834 835 /* 836 * Now set the popup size to be big enough for the text plus the border capped 837 * to DEFAULT_MAX_POPUP_WIDTH 838 */ 839 pop.setWidth(wid + (int) Math.ceil(max)); 840 pop.setHeight(ht + l.getHeight()); 841 } 842 843 void setFrame() { 844 if (mErrorPopup != null) { 845 TextView tv = (TextView) mErrorPopup.getContentView(); 846 chooseSize(mErrorPopup, mError, tv); 847 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 848 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 849 } 850 } 851 852 private int getWordStart(int offset) { 853 // FIXME - For this and similar methods we're not doing anything to check if there's 854 // a LocaleSpan in the text, this may be something we should try handling or checking for. 855 int retOffset = getWordIteratorWithText().prevBoundary(offset); 856 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 857 // On punctuation boundary or within group of punctuation, find punctuation start. 858 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 859 } else { 860 // Not on a punctuation boundary, find the word start. 861 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 862 } 863 if (retOffset == BreakIterator.DONE) { 864 return offset; 865 } 866 return retOffset; 867 } 868 869 private int getWordEnd(int offset) { 870 int retOffset = getWordIteratorWithText().nextBoundary(offset); 871 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 872 // On punctuation boundary or within group of punctuation, find punctuation end. 873 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 874 } else { 875 // Not on a punctuation boundary, find the word end. 876 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 877 } 878 if (retOffset == BreakIterator.DONE) { 879 return offset; 880 } 881 return retOffset; 882 } 883 884 private boolean needsToSelectAllToSelectWordOrParagraph() { 885 if (mTextView.hasPasswordTransformationMethod()) { 886 // Always select all on a password field. 887 // Cut/copy menu entries are not available for passwords, but being able to select all 888 // is however useful to delete or paste to replace the entire content. 889 return true; 890 } 891 892 int inputType = mTextView.getInputType(); 893 int klass = inputType & InputType.TYPE_MASK_CLASS; 894 int variation = inputType & InputType.TYPE_MASK_VARIATION; 895 896 // Specific text field types: select the entire text for these 897 if (klass == InputType.TYPE_CLASS_NUMBER 898 || klass == InputType.TYPE_CLASS_PHONE 899 || klass == InputType.TYPE_CLASS_DATETIME 900 || variation == InputType.TYPE_TEXT_VARIATION_URI 901 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 902 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 903 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 904 return true; 905 } 906 return false; 907 } 908 909 /** 910 * Adjusts selection to the word under last touch offset. Return true if the operation was 911 * successfully performed. 912 */ 913 boolean selectCurrentWord() { 914 if (!mTextView.canSelectText()) { 915 return false; 916 } 917 918 if (needsToSelectAllToSelectWordOrParagraph()) { 919 return mTextView.selectAllText(); 920 } 921 922 long lastTouchOffsets = getLastTouchOffsets(); 923 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 924 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 925 926 // Safety check in case standard touch event handling has been bypassed 927 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 928 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 929 930 int selectionStart, selectionEnd; 931 932 // If a URLSpan (web address, email, phone...) is found at that position, select it. 933 URLSpan[] urlSpans = 934 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 935 if (urlSpans.length >= 1) { 936 URLSpan urlSpan = urlSpans[0]; 937 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 938 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 939 } else { 940 // FIXME - We should check if there's a LocaleSpan in the text, this may be 941 // something we should try handling or checking for. 942 final WordIterator wordIterator = getWordIterator(); 943 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 944 945 selectionStart = wordIterator.getBeginning(minOffset); 946 selectionEnd = wordIterator.getEnd(maxOffset); 947 948 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 949 || selectionStart == selectionEnd) { 950 // Possible when the word iterator does not properly handle the text's language 951 long range = getCharClusterRange(minOffset); 952 selectionStart = TextUtils.unpackRangeStartFromLong(range); 953 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 954 } 955 } 956 957 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 958 return selectionEnd > selectionStart; 959 } 960 961 /** 962 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 963 * successfully performed. 964 */ 965 private boolean selectCurrentParagraph() { 966 if (!mTextView.canSelectText()) { 967 return false; 968 } 969 970 if (needsToSelectAllToSelectWordOrParagraph()) { 971 return mTextView.selectAllText(); 972 } 973 974 long lastTouchOffsets = getLastTouchOffsets(); 975 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 976 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 977 978 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 979 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 980 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 981 if (start < end) { 982 Selection.setSelection((Spannable) mTextView.getText(), start, end); 983 return true; 984 } 985 return false; 986 } 987 988 /** 989 * Get the minimum range of paragraphs that contains startOffset and endOffset. 990 */ 991 private long getParagraphsRange(int startOffset, int endOffset) { 992 final Layout layout = mTextView.getLayout(); 993 if (layout == null) { 994 return TextUtils.packRangeInLong(-1, -1); 995 } 996 final CharSequence text = mTextView.getText(); 997 int minLine = layout.getLineForOffset(startOffset); 998 // Search paragraph start. 999 while (minLine > 0) { 1000 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 1001 if (text.charAt(prevLineEndOffset - 1) == '\n') { 1002 break; 1003 } 1004 minLine--; 1005 } 1006 int maxLine = layout.getLineForOffset(endOffset); 1007 // Search paragraph end. 1008 while (maxLine < layout.getLineCount() - 1) { 1009 final int lineEndOffset = layout.getLineEnd(maxLine); 1010 if (text.charAt(lineEndOffset - 1) == '\n') { 1011 break; 1012 } 1013 maxLine++; 1014 } 1015 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 1016 } 1017 1018 void onLocaleChanged() { 1019 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 1020 // proper new locale 1021 mWordIterator = null; 1022 mWordIteratorWithText = null; 1023 } 1024 1025 public WordIterator getWordIterator() { 1026 if (mWordIterator == null) { 1027 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 1028 } 1029 return mWordIterator; 1030 } 1031 1032 private WordIterator getWordIteratorWithText() { 1033 if (mWordIteratorWithText == null) { 1034 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 1035 mUpdateWordIteratorText = true; 1036 } 1037 if (mUpdateWordIteratorText) { 1038 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 1039 // to the user's selection is needed. A possible solution would be to 1040 // copy some number N of characters near the selection and then when the 1041 // user approaches N then we'd do another copy of the next N characters. 1042 CharSequence text = mTextView.getText(); 1043 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 1044 mUpdateWordIteratorText = false; 1045 } 1046 return mWordIteratorWithText; 1047 } 1048 1049 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 1050 final Layout layout = mTextView.getLayout(); 1051 if (layout == null) return offset; 1052 return findAfterGivenOffset == layout.isRtlCharAt(offset) 1053 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 1054 } 1055 1056 private long getCharClusterRange(int offset) { 1057 final int textLength = mTextView.getText().length(); 1058 if (offset < textLength) { 1059 final int clusterEndOffset = getNextCursorOffset(offset, true); 1060 return TextUtils.packRangeInLong( 1061 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 1062 } 1063 if (offset - 1 >= 0) { 1064 final int clusterStartOffset = getNextCursorOffset(offset, false); 1065 return TextUtils.packRangeInLong(clusterStartOffset, 1066 getNextCursorOffset(clusterStartOffset, true)); 1067 } 1068 return TextUtils.packRangeInLong(offset, offset); 1069 } 1070 1071 private boolean touchPositionIsInSelection() { 1072 int selectionStart = mTextView.getSelectionStart(); 1073 int selectionEnd = mTextView.getSelectionEnd(); 1074 1075 if (selectionStart == selectionEnd) { 1076 return false; 1077 } 1078 1079 if (selectionStart > selectionEnd) { 1080 int tmp = selectionStart; 1081 selectionStart = selectionEnd; 1082 selectionEnd = tmp; 1083 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1084 } 1085 1086 SelectionModifierCursorController selectionController = getSelectionController(); 1087 int minOffset = selectionController.getMinTouchOffset(); 1088 int maxOffset = selectionController.getMaxTouchOffset(); 1089 1090 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1091 } 1092 1093 private PositionListener getPositionListener() { 1094 if (mPositionListener == null) { 1095 mPositionListener = new PositionListener(); 1096 } 1097 return mPositionListener; 1098 } 1099 1100 private interface TextViewPositionListener { 1101 public void updatePosition(int parentPositionX, int parentPositionY, 1102 boolean parentPositionChanged, boolean parentScrolled); 1103 } 1104 1105 private boolean isOffsetVisible(int offset) { 1106 Layout layout = mTextView.getLayout(); 1107 if (layout == null) return false; 1108 1109 final int line = layout.getLineForOffset(offset); 1110 final int lineBottom = layout.getLineBottom(line); 1111 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1112 return mTextView.isPositionVisible( 1113 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1114 lineBottom + mTextView.viewportToContentVerticalOffset()); 1115 } 1116 1117 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1118 * in the view. Returns false when the position is in the empty space of left/right of text. 1119 */ 1120 private boolean isPositionOnText(float x, float y) { 1121 Layout layout = mTextView.getLayout(); 1122 if (layout == null) return false; 1123 1124 final int line = mTextView.getLineAtCoordinate(y); 1125 x = mTextView.convertToLocalHorizontalCoordinate(x); 1126 1127 if (x < layout.getLineLeft(line)) return false; 1128 if (x > layout.getLineRight(line)) return false; 1129 return true; 1130 } 1131 1132 private void startDragAndDrop() { 1133 getSelectionActionModeHelper().onSelectionDrag(); 1134 1135 // TODO: Fix drag and drop in full screen extracted mode. 1136 if (mTextView.isInExtractedMode()) { 1137 return; 1138 } 1139 final int start = mTextView.getSelectionStart(); 1140 final int end = mTextView.getSelectionEnd(); 1141 CharSequence selectedText = mTextView.getTransformedText(start, end); 1142 ClipData data = ClipData.newPlainText(null, selectedText); 1143 DragLocalState localState = new DragLocalState(mTextView, start, end); 1144 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1145 View.DRAG_FLAG_GLOBAL); 1146 stopTextActionMode(); 1147 if (hasSelectionController()) { 1148 getSelectionController().resetTouchOffsets(); 1149 } 1150 } 1151 1152 public boolean performLongClick(boolean handled) { 1153 // Long press in empty space moves cursor and starts the insertion action mode. 1154 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1155 && mInsertionControllerEnabled) { 1156 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1157 mLastDownPositionY); 1158 Selection.setSelection((Spannable) mTextView.getText(), offset); 1159 getInsertionController().show(); 1160 mIsInsertionActionModeStartPending = true; 1161 handled = true; 1162 MetricsLogger.action( 1163 mTextView.getContext(), 1164 MetricsEvent.TEXT_LONGPRESS, 1165 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1166 } 1167 1168 if (!handled && mTextActionMode != null) { 1169 if (touchPositionIsInSelection()) { 1170 startDragAndDrop(); 1171 MetricsLogger.action( 1172 mTextView.getContext(), 1173 MetricsEvent.TEXT_LONGPRESS, 1174 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1175 } else { 1176 stopTextActionMode(); 1177 selectCurrentWordAndStartDrag(); 1178 MetricsLogger.action( 1179 mTextView.getContext(), 1180 MetricsEvent.TEXT_LONGPRESS, 1181 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1182 } 1183 handled = true; 1184 } 1185 1186 // Start a new selection 1187 if (!handled) { 1188 handled = selectCurrentWordAndStartDrag(); 1189 if (handled) { 1190 MetricsLogger.action( 1191 mTextView.getContext(), 1192 MetricsEvent.TEXT_LONGPRESS, 1193 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1194 } 1195 } 1196 1197 return handled; 1198 } 1199 1200 float getLastUpPositionX() { 1201 return mLastUpPositionX; 1202 } 1203 1204 float getLastUpPositionY() { 1205 return mLastUpPositionY; 1206 } 1207 1208 private long getLastTouchOffsets() { 1209 SelectionModifierCursorController selectionController = getSelectionController(); 1210 final int minOffset = selectionController.getMinTouchOffset(); 1211 final int maxOffset = selectionController.getMaxTouchOffset(); 1212 return TextUtils.packRangeInLong(minOffset, maxOffset); 1213 } 1214 1215 void onFocusChanged(boolean focused, int direction) { 1216 mShowCursor = SystemClock.uptimeMillis(); 1217 ensureEndedBatchEdit(); 1218 1219 if (focused) { 1220 int selStart = mTextView.getSelectionStart(); 1221 int selEnd = mTextView.getSelectionEnd(); 1222 1223 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1224 // mode for these, unless there was a specific selection already started. 1225 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1226 && selEnd == mTextView.getText().length(); 1227 1228 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1229 && !isFocusHighlighted; 1230 1231 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1232 // If a tap was used to give focus to that view, move cursor at tap position. 1233 // Has to be done before onTakeFocus, which can be overloaded. 1234 final int lastTapPosition = getLastTapPosition(); 1235 if (lastTapPosition >= 0) { 1236 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1237 } 1238 1239 // Note this may have to be moved out of the Editor class 1240 MovementMethod mMovement = mTextView.getMovementMethod(); 1241 if (mMovement != null) { 1242 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1243 } 1244 1245 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1246 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1247 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1248 // This special case ensure that we keep current selection in that case. 1249 // It would be better to know why the DecorView does not have focus at that time. 1250 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1251 && selStart >= 0 && selEnd >= 0) { 1252 /* 1253 * Someone intentionally set the selection, so let them 1254 * do whatever it is that they wanted to do instead of 1255 * the default on-focus behavior. We reset the selection 1256 * here instead of just skipping the onTakeFocus() call 1257 * because some movement methods do something other than 1258 * just setting the selection in theirs and we still 1259 * need to go through that path. 1260 */ 1261 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1262 } 1263 1264 if (mSelectAllOnFocus) { 1265 mTextView.selectAllText(); 1266 } 1267 1268 mTouchFocusSelected = true; 1269 } 1270 1271 mFrozenWithFocus = false; 1272 mSelectionMoved = false; 1273 1274 if (mError != null) { 1275 showError(); 1276 } 1277 1278 makeBlink(); 1279 } else { 1280 if (mError != null) { 1281 hideError(); 1282 } 1283 // Don't leave us in the middle of a batch edit. 1284 mTextView.onEndBatchEdit(); 1285 1286 if (mTextView.isInExtractedMode()) { 1287 hideCursorAndSpanControllers(); 1288 stopTextActionModeWithPreservingSelection(); 1289 } else { 1290 hideCursorAndSpanControllers(); 1291 if (mTextView.isTemporarilyDetached()) { 1292 stopTextActionModeWithPreservingSelection(); 1293 } else { 1294 stopTextActionMode(); 1295 } 1296 downgradeEasyCorrectionSpans(); 1297 } 1298 // No need to create the controller 1299 if (mSelectionModifierCursorController != null) { 1300 mSelectionModifierCursorController.resetTouchOffsets(); 1301 } 1302 } 1303 } 1304 1305 /** 1306 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1307 * span. 1308 */ 1309 private void downgradeEasyCorrectionSpans() { 1310 CharSequence text = mTextView.getText(); 1311 if (text instanceof Spannable) { 1312 Spannable spannable = (Spannable) text; 1313 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1314 spannable.length(), SuggestionSpan.class); 1315 for (int i = 0; i < suggestionSpans.length; i++) { 1316 int flags = suggestionSpans[i].getFlags(); 1317 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1318 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1319 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1320 suggestionSpans[i].setFlags(flags); 1321 } 1322 } 1323 } 1324 } 1325 1326 void sendOnTextChanged(int start, int before, int after) { 1327 getSelectionActionModeHelper().onTextChanged(start, start + before); 1328 updateSpellCheckSpans(start, start + after, false); 1329 1330 // Flip flag to indicate the word iterator needs to have the text reset. 1331 mUpdateWordIteratorText = true; 1332 1333 // Hide the controllers as soon as text is modified (typing, procedural...) 1334 // We do not hide the span controllers, since they can be added when a new text is 1335 // inserted into the text view (voice IME). 1336 hideCursorControllers(); 1337 // Reset drag accelerator. 1338 if (mSelectionModifierCursorController != null) { 1339 mSelectionModifierCursorController.resetTouchOffsets(); 1340 } 1341 stopTextActionMode(); 1342 } 1343 1344 private int getLastTapPosition() { 1345 // No need to create the controller at that point, no last tap position saved 1346 if (mSelectionModifierCursorController != null) { 1347 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1348 if (lastTapPosition >= 0) { 1349 // Safety check, should not be possible. 1350 if (lastTapPosition > mTextView.getText().length()) { 1351 lastTapPosition = mTextView.getText().length(); 1352 } 1353 return lastTapPosition; 1354 } 1355 } 1356 1357 return -1; 1358 } 1359 1360 void onWindowFocusChanged(boolean hasWindowFocus) { 1361 if (hasWindowFocus) { 1362 if (mBlink != null) { 1363 mBlink.uncancel(); 1364 makeBlink(); 1365 } 1366 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1367 refreshTextActionMode(); 1368 } 1369 } else { 1370 if (mBlink != null) { 1371 mBlink.cancel(); 1372 } 1373 if (mInputContentType != null) { 1374 mInputContentType.enterDown = false; 1375 } 1376 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1377 hideCursorAndSpanControllers(); 1378 stopTextActionModeWithPreservingSelection(); 1379 if (mSuggestionsPopupWindow != null) { 1380 mSuggestionsPopupWindow.onParentLostFocus(); 1381 } 1382 1383 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1384 ensureEndedBatchEdit(); 1385 } 1386 } 1387 1388 private void updateTapState(MotionEvent event) { 1389 final int action = event.getActionMasked(); 1390 if (action == MotionEvent.ACTION_DOWN) { 1391 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1392 // Detect double tap and triple click. 1393 if (((mTapState == TAP_STATE_FIRST_TAP) 1394 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1395 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1396 <= ViewConfiguration.getDoubleTapTimeout()) { 1397 if (mTapState == TAP_STATE_FIRST_TAP) { 1398 mTapState = TAP_STATE_DOUBLE_TAP; 1399 } else { 1400 mTapState = TAP_STATE_TRIPLE_CLICK; 1401 } 1402 } else { 1403 mTapState = TAP_STATE_FIRST_TAP; 1404 } 1405 } 1406 if (action == MotionEvent.ACTION_UP) { 1407 mLastTouchUpTime = SystemClock.uptimeMillis(); 1408 } 1409 } 1410 1411 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1412 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1413 return false; 1414 } 1415 final boolean primaryButtonStateChanged = 1416 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1417 final int action = event.getActionMasked(); 1418 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1419 && !primaryButtonStateChanged) { 1420 return true; 1421 } 1422 if (action == MotionEvent.ACTION_MOVE 1423 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1424 return true; 1425 } 1426 return false; 1427 } 1428 1429 void onTouchEvent(MotionEvent event) { 1430 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1431 mLastButtonState = event.getButtonState(); 1432 if (filterOutEvent) { 1433 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1434 mDiscardNextActionUp = true; 1435 } 1436 return; 1437 } 1438 updateTapState(event); 1439 updateFloatingToolbarVisibility(event); 1440 1441 if (hasSelectionController()) { 1442 getSelectionController().onTouchEvent(event); 1443 } 1444 1445 if (mShowSuggestionRunnable != null) { 1446 mTextView.removeCallbacks(mShowSuggestionRunnable); 1447 mShowSuggestionRunnable = null; 1448 } 1449 1450 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1451 mLastUpPositionX = event.getX(); 1452 mLastUpPositionY = event.getY(); 1453 } 1454 1455 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1456 mLastDownPositionX = event.getX(); 1457 mLastDownPositionY = event.getY(); 1458 1459 // Reset this state; it will be re-set if super.onTouchEvent 1460 // causes focus to move to the view. 1461 mTouchFocusSelected = false; 1462 mIgnoreActionUpEvent = false; 1463 } 1464 } 1465 1466 private void updateFloatingToolbarVisibility(MotionEvent event) { 1467 if (mTextActionMode != null) { 1468 switch (event.getActionMasked()) { 1469 case MotionEvent.ACTION_MOVE: 1470 hideFloatingToolbar(ActionMode.DEFAULT_HIDE_DURATION); 1471 break; 1472 case MotionEvent.ACTION_UP: // fall through 1473 case MotionEvent.ACTION_CANCEL: 1474 showFloatingToolbar(); 1475 } 1476 } 1477 } 1478 1479 void hideFloatingToolbar(int duration) { 1480 if (mTextActionMode != null) { 1481 mTextView.removeCallbacks(mShowFloatingToolbar); 1482 mTextActionMode.hide(duration); 1483 } 1484 } 1485 1486 private void showFloatingToolbar() { 1487 if (mTextActionMode != null) { 1488 // Delay "show" so it doesn't interfere with click confirmations 1489 // or double-clicks that could "dismiss" the floating toolbar. 1490 int delay = ViewConfiguration.getDoubleTapTimeout(); 1491 mTextView.postDelayed(mShowFloatingToolbar, delay); 1492 1493 // This classifies the text and most likely returns before the toolbar is actually 1494 // shown. If not, it will update the toolbar with the result when classification 1495 // returns. We would rather not wait for a long running classification process. 1496 invalidateActionModeAsync(); 1497 } 1498 } 1499 1500 public void beginBatchEdit() { 1501 mInBatchEditControllers = true; 1502 final InputMethodState ims = mInputMethodState; 1503 if (ims != null) { 1504 int nesting = ++ims.mBatchEditNesting; 1505 if (nesting == 1) { 1506 ims.mCursorChanged = false; 1507 ims.mChangedDelta = 0; 1508 if (ims.mContentChanged) { 1509 // We already have a pending change from somewhere else, 1510 // so turn this into a full update. 1511 ims.mChangedStart = 0; 1512 ims.mChangedEnd = mTextView.getText().length(); 1513 } else { 1514 ims.mChangedStart = EXTRACT_UNKNOWN; 1515 ims.mChangedEnd = EXTRACT_UNKNOWN; 1516 ims.mContentChanged = false; 1517 } 1518 mUndoInputFilter.beginBatchEdit(); 1519 mTextView.onBeginBatchEdit(); 1520 } 1521 } 1522 } 1523 1524 public void endBatchEdit() { 1525 mInBatchEditControllers = false; 1526 final InputMethodState ims = mInputMethodState; 1527 if (ims != null) { 1528 int nesting = --ims.mBatchEditNesting; 1529 if (nesting == 0) { 1530 finishBatchEdit(ims); 1531 } 1532 } 1533 } 1534 1535 void ensureEndedBatchEdit() { 1536 final InputMethodState ims = mInputMethodState; 1537 if (ims != null && ims.mBatchEditNesting != 0) { 1538 ims.mBatchEditNesting = 0; 1539 finishBatchEdit(ims); 1540 } 1541 } 1542 1543 void finishBatchEdit(final InputMethodState ims) { 1544 mTextView.onEndBatchEdit(); 1545 mUndoInputFilter.endBatchEdit(); 1546 1547 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1548 mTextView.updateAfterEdit(); 1549 reportExtractedText(); 1550 } else if (ims.mCursorChanged) { 1551 // Cheesy way to get us to report the current cursor location. 1552 mTextView.invalidateCursor(); 1553 } 1554 // sendUpdateSelection knows to avoid sending if the selection did 1555 // not actually change. 1556 sendUpdateSelection(); 1557 1558 // Show drag handles if they were blocked by batch edit mode. 1559 if (mTextActionMode != null) { 1560 final CursorController cursorController = mTextView.hasSelection() 1561 ? getSelectionController() : getInsertionController(); 1562 if (cursorController != null && !cursorController.isActive() 1563 && !cursorController.isCursorBeingModified()) { 1564 cursorController.show(); 1565 } 1566 } 1567 } 1568 1569 static final int EXTRACT_NOTHING = -2; 1570 static final int EXTRACT_UNKNOWN = -1; 1571 1572 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1573 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1574 EXTRACT_UNKNOWN, outText); 1575 } 1576 1577 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1578 int partialStartOffset, int partialEndOffset, int delta, 1579 @Nullable ExtractedText outText) { 1580 if (request == null || outText == null) { 1581 return false; 1582 } 1583 1584 final CharSequence content = mTextView.getText(); 1585 if (content == null) { 1586 return false; 1587 } 1588 1589 if (partialStartOffset != EXTRACT_NOTHING) { 1590 final int N = content.length(); 1591 if (partialStartOffset < 0) { 1592 outText.partialStartOffset = outText.partialEndOffset = -1; 1593 partialStartOffset = 0; 1594 partialEndOffset = N; 1595 } else { 1596 // Now use the delta to determine the actual amount of text 1597 // we need. 1598 partialEndOffset += delta; 1599 // Adjust offsets to ensure we contain full spans. 1600 if (content instanceof Spanned) { 1601 Spanned spanned = (Spanned) content; 1602 Object[] spans = spanned.getSpans(partialStartOffset, 1603 partialEndOffset, ParcelableSpan.class); 1604 int i = spans.length; 1605 while (i > 0) { 1606 i--; 1607 int j = spanned.getSpanStart(spans[i]); 1608 if (j < partialStartOffset) partialStartOffset = j; 1609 j = spanned.getSpanEnd(spans[i]); 1610 if (j > partialEndOffset) partialEndOffset = j; 1611 } 1612 } 1613 outText.partialStartOffset = partialStartOffset; 1614 outText.partialEndOffset = partialEndOffset - delta; 1615 1616 if (partialStartOffset > N) { 1617 partialStartOffset = N; 1618 } else if (partialStartOffset < 0) { 1619 partialStartOffset = 0; 1620 } 1621 if (partialEndOffset > N) { 1622 partialEndOffset = N; 1623 } else if (partialEndOffset < 0) { 1624 partialEndOffset = 0; 1625 } 1626 } 1627 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1628 outText.text = content.subSequence(partialStartOffset, 1629 partialEndOffset); 1630 } else { 1631 outText.text = TextUtils.substring(content, partialStartOffset, 1632 partialEndOffset); 1633 } 1634 } else { 1635 outText.partialStartOffset = 0; 1636 outText.partialEndOffset = 0; 1637 outText.text = ""; 1638 } 1639 outText.flags = 0; 1640 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1641 outText.flags |= ExtractedText.FLAG_SELECTING; 1642 } 1643 if (mTextView.isSingleLine()) { 1644 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1645 } 1646 outText.startOffset = 0; 1647 outText.selectionStart = mTextView.getSelectionStart(); 1648 outText.selectionEnd = mTextView.getSelectionEnd(); 1649 outText.hint = mTextView.getHint(); 1650 return true; 1651 } 1652 1653 boolean reportExtractedText() { 1654 final Editor.InputMethodState ims = mInputMethodState; 1655 if (ims == null) { 1656 return false; 1657 } 1658 ims.mSelectionModeChanged = false; 1659 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1660 if (req == null) { 1661 return false; 1662 } 1663 final InputMethodManager imm = InputMethodManager.peekInstance(); 1664 if (imm == null) { 1665 return false; 1666 } 1667 if (TextView.DEBUG_EXTRACT) { 1668 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1669 + ims.mChangedStart 1670 + " end=" + ims.mChangedEnd 1671 + " delta=" + ims.mChangedDelta); 1672 } 1673 if (ims.mChangedStart < 0 && !ims.mContentChanged) { 1674 ims.mChangedStart = EXTRACT_NOTHING; 1675 } 1676 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1677 ims.mChangedDelta, ims.mExtractedText)) { 1678 if (TextView.DEBUG_EXTRACT) { 1679 Log.v(TextView.LOG_TAG, 1680 "Reporting extracted start=" 1681 + ims.mExtractedText.partialStartOffset 1682 + " end=" + ims.mExtractedText.partialEndOffset 1683 + ": " + ims.mExtractedText.text); 1684 } 1685 1686 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1687 ims.mChangedStart = EXTRACT_UNKNOWN; 1688 ims.mChangedEnd = EXTRACT_UNKNOWN; 1689 ims.mChangedDelta = 0; 1690 ims.mContentChanged = false; 1691 return true; 1692 } 1693 return false; 1694 } 1695 1696 private void sendUpdateSelection() { 1697 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1698 final InputMethodManager imm = InputMethodManager.peekInstance(); 1699 if (null != imm) { 1700 final int selectionStart = mTextView.getSelectionStart(); 1701 final int selectionEnd = mTextView.getSelectionEnd(); 1702 int candStart = -1; 1703 int candEnd = -1; 1704 if (mTextView.getText() instanceof Spannable) { 1705 final Spannable sp = (Spannable) mTextView.getText(); 1706 candStart = EditableInputConnection.getComposingSpanStart(sp); 1707 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1708 } 1709 // InputMethodManager#updateSelection skips sending the message if 1710 // none of the parameters have changed since the last time we called it. 1711 imm.updateSelection(mTextView, 1712 selectionStart, selectionEnd, candStart, candEnd); 1713 } 1714 } 1715 } 1716 1717 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1718 int cursorOffsetVertical) { 1719 final int selectionStart = mTextView.getSelectionStart(); 1720 final int selectionEnd = mTextView.getSelectionEnd(); 1721 1722 final InputMethodState ims = mInputMethodState; 1723 if (ims != null && ims.mBatchEditNesting == 0) { 1724 InputMethodManager imm = InputMethodManager.peekInstance(); 1725 if (imm != null) { 1726 if (imm.isActive(mTextView)) { 1727 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1728 // We are in extract mode and the content has changed 1729 // in some way... just report complete new text to the 1730 // input method. 1731 reportExtractedText(); 1732 } 1733 } 1734 } 1735 } 1736 1737 if (mCorrectionHighlighter != null) { 1738 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1739 } 1740 1741 if (highlight != null && selectionStart == selectionEnd && mDrawableForCursor != null) { 1742 drawCursor(canvas, cursorOffsetVertical); 1743 // Rely on the drawable entirely, do not draw the cursor line. 1744 // Has to be done after the IMM related code above which relies on the highlight. 1745 highlight = null; 1746 } 1747 1748 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1749 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1750 cursorOffsetVertical); 1751 } else { 1752 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1753 } 1754 1755 if (mSelectionActionModeHelper != null) { 1756 mSelectionActionModeHelper.onDraw(canvas); 1757 } 1758 } 1759 1760 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1761 Paint highlightPaint, int cursorOffsetVertical) { 1762 final long lineRange = layout.getLineRangeForDraw(canvas); 1763 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1764 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1765 if (lastLine < 0) return; 1766 1767 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1768 firstLine, lastLine); 1769 1770 if (layout instanceof DynamicLayout) { 1771 if (mTextRenderNodes == null) { 1772 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1773 } 1774 1775 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1776 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1777 int[] blockIndices = dynamicLayout.getBlockIndices(); 1778 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1779 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1780 1781 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1782 if (blockSet != null) { 1783 for (int i = 0; i < blockSet.size(); i++) { 1784 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1785 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1786 && mTextRenderNodes[blockIndex] != null) { 1787 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1788 } 1789 } 1790 } 1791 1792 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1793 if (startBlock < 0) { 1794 startBlock = -(startBlock + 1); 1795 } 1796 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1797 1798 int startIndexToFindAvailableRenderNode = 0; 1799 int lastIndex = numberOfBlocks; 1800 1801 for (int i = startBlock; i < numberOfBlocks; i++) { 1802 final int blockIndex = blockIndices[i]; 1803 if (i >= indexFirstChangedBlock 1804 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1805 && mTextRenderNodes[blockIndex] != null) { 1806 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1807 } 1808 if (blockEndLines[i] < firstLine) { 1809 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1810 // be redrawn after they get scrolled into drawing range. 1811 continue; 1812 } 1813 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1814 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1815 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1816 if (blockEndLines[i] >= lastLine) { 1817 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1818 break; 1819 } 1820 } 1821 if (blockSet != null) { 1822 for (int i = 0; i < blockSet.size(); i++) { 1823 final int block = blockSet.valueAt(i); 1824 final int blockIndex = dynamicLayout.getBlockIndex(block); 1825 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1826 || mTextRenderNodes[blockIndex] == null 1827 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1828 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1829 layout, highlight, highlightPaint, cursorOffsetVertical, 1830 blockEndLines, blockIndices, block, numberOfBlocks, 1831 startIndexToFindAvailableRenderNode); 1832 } 1833 } 1834 } 1835 1836 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1837 } else { 1838 // Boring layout is used for empty and hint text 1839 layout.drawText(canvas, firstLine, lastLine); 1840 } 1841 } 1842 1843 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1844 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1845 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1846 int startIndexToFindAvailableRenderNode) { 1847 final int blockEndLine = blockEndLines[blockInfoIndex]; 1848 int blockIndex = blockIndices[blockInfoIndex]; 1849 1850 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1851 if (blockIsInvalid) { 1852 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1853 startIndexToFindAvailableRenderNode); 1854 // Note how dynamic layout's internal block indices get updated from Editor 1855 blockIndices[blockInfoIndex] = blockIndex; 1856 if (mTextRenderNodes[blockIndex] != null) { 1857 mTextRenderNodes[blockIndex].isDirty = true; 1858 } 1859 startIndexToFindAvailableRenderNode = blockIndex + 1; 1860 } 1861 1862 if (mTextRenderNodes[blockIndex] == null) { 1863 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1864 } 1865 1866 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1867 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1868 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1869 final int blockBeginLine = blockInfoIndex == 0 ? 1870 0 : blockEndLines[blockInfoIndex - 1] + 1; 1871 final int top = layout.getLineTop(blockBeginLine); 1872 final int bottom = layout.getLineBottom(blockEndLine); 1873 int left = 0; 1874 int right = mTextView.getWidth(); 1875 if (mTextView.getHorizontallyScrolling()) { 1876 float min = Float.MAX_VALUE; 1877 float max = Float.MIN_VALUE; 1878 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1879 min = Math.min(min, layout.getLineLeft(line)); 1880 max = Math.max(max, layout.getLineRight(line)); 1881 } 1882 left = (int) min; 1883 right = (int) (max + 0.5f); 1884 } 1885 1886 // Rebuild display list if it is invalid 1887 if (blockDisplayListIsInvalid) { 1888 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1889 right - left, bottom - top); 1890 try { 1891 // drawText is always relative to TextView's origin, this translation 1892 // brings this range of text back to the top left corner of the viewport 1893 displayListCanvas.translate(-left, -top); 1894 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1895 mTextRenderNodes[blockIndex].isDirty = false; 1896 // No need to untranslate, previous context is popped after 1897 // drawDisplayList 1898 } finally { 1899 blockDisplayList.end(displayListCanvas); 1900 // Same as drawDisplayList below, handled by our TextView's parent 1901 blockDisplayList.setClipToBounds(false); 1902 } 1903 } 1904 1905 // Valid display list only needs to update its drawing location. 1906 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1907 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1908 } 1909 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1910 return startIndexToFindAvailableRenderNode; 1911 } 1912 1913 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1914 int searchStartIndex) { 1915 int length = mTextRenderNodes.length; 1916 for (int i = searchStartIndex; i < length; i++) { 1917 boolean blockIndexFound = false; 1918 for (int j = 0; j < numberOfBlocks; j++) { 1919 if (blockIndices[j] == i) { 1920 blockIndexFound = true; 1921 break; 1922 } 1923 } 1924 if (blockIndexFound) continue; 1925 return i; 1926 } 1927 1928 // No available index found, the pool has to grow 1929 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1930 return length; 1931 } 1932 1933 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1934 final boolean translate = cursorOffsetVertical != 0; 1935 if (translate) canvas.translate(0, cursorOffsetVertical); 1936 if (mDrawableForCursor != null) { 1937 mDrawableForCursor.draw(canvas); 1938 } 1939 if (translate) canvas.translate(0, -cursorOffsetVertical); 1940 } 1941 1942 void invalidateHandlesAndActionMode() { 1943 if (mSelectionModifierCursorController != null) { 1944 mSelectionModifierCursorController.invalidateHandles(); 1945 } 1946 if (mInsertionPointCursorController != null) { 1947 mInsertionPointCursorController.invalidateHandle(); 1948 } 1949 if (mTextActionMode != null) { 1950 invalidateActionMode(); 1951 } 1952 } 1953 1954 /** 1955 * Invalidates all the sub-display lists that overlap the specified character range 1956 */ 1957 void invalidateTextDisplayList(Layout layout, int start, int end) { 1958 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1959 final int firstLine = layout.getLineForOffset(start); 1960 final int lastLine = layout.getLineForOffset(end); 1961 1962 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1963 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1964 int[] blockIndices = dynamicLayout.getBlockIndices(); 1965 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1966 1967 int i = 0; 1968 // Skip the blocks before firstLine 1969 while (i < numberOfBlocks) { 1970 if (blockEndLines[i] >= firstLine) break; 1971 i++; 1972 } 1973 1974 // Invalidate all subsequent blocks until lastLine is passed 1975 while (i < numberOfBlocks) { 1976 final int blockIndex = blockIndices[i]; 1977 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1978 mTextRenderNodes[blockIndex].isDirty = true; 1979 } 1980 if (blockEndLines[i] >= lastLine) break; 1981 i++; 1982 } 1983 } 1984 } 1985 1986 void invalidateTextDisplayList() { 1987 if (mTextRenderNodes != null) { 1988 for (int i = 0; i < mTextRenderNodes.length; i++) { 1989 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1990 } 1991 } 1992 } 1993 1994 void updateCursorPosition() { 1995 if (mTextView.mCursorDrawableRes == 0) { 1996 mDrawableForCursor = null; 1997 return; 1998 } 1999 2000 final Layout layout = mTextView.getLayout(); 2001 final int offset = mTextView.getSelectionStart(); 2002 final int line = layout.getLineForOffset(offset); 2003 final int top = layout.getLineTop(line); 2004 final int bottom = layout.getLineBottomWithoutSpacing(line); 2005 2006 final boolean clamped = layout.shouldClampCursor(line); 2007 updateCursorPosition(top, bottom, layout.getPrimaryHorizontal(offset, clamped)); 2008 } 2009 2010 void refreshTextActionMode() { 2011 if (extractedTextModeWillBeStarted()) { 2012 mRestartActionModeOnNextRefresh = false; 2013 return; 2014 } 2015 final boolean hasSelection = mTextView.hasSelection(); 2016 final SelectionModifierCursorController selectionController = getSelectionController(); 2017 final InsertionPointCursorController insertionController = getInsertionController(); 2018 if ((selectionController != null && selectionController.isCursorBeingModified()) 2019 || (insertionController != null && insertionController.isCursorBeingModified())) { 2020 // ActionMode should be managed by the currently active cursor controller. 2021 mRestartActionModeOnNextRefresh = false; 2022 return; 2023 } 2024 if (hasSelection) { 2025 hideInsertionPointCursorController(); 2026 if (mTextActionMode == null) { 2027 if (mRestartActionModeOnNextRefresh) { 2028 // To avoid distraction, newly start action mode only when selection action 2029 // mode is being restarted. 2030 startSelectionActionModeAsync(false); 2031 } 2032 } else if (selectionController == null || !selectionController.isActive()) { 2033 // Insertion action mode is active. Avoid dismissing the selection. 2034 stopTextActionModeWithPreservingSelection(); 2035 startSelectionActionModeAsync(false); 2036 } else { 2037 mTextActionMode.invalidateContentRect(); 2038 } 2039 } else { 2040 // Insertion action mode is started only when insertion controller is explicitly 2041 // activated. 2042 if (insertionController == null || !insertionController.isActive()) { 2043 stopTextActionMode(); 2044 } else if (mTextActionMode != null) { 2045 mTextActionMode.invalidateContentRect(); 2046 } 2047 } 2048 mRestartActionModeOnNextRefresh = false; 2049 } 2050 2051 /** 2052 * Start an Insertion action mode. 2053 */ 2054 void startInsertionActionMode() { 2055 if (mInsertionActionModeRunnable != null) { 2056 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2057 } 2058 if (extractedTextModeWillBeStarted()) { 2059 return; 2060 } 2061 stopTextActionMode(); 2062 2063 ActionMode.Callback actionModeCallback = 2064 new TextActionModeCallback(TextActionMode.INSERTION); 2065 mTextActionMode = mTextView.startActionMode( 2066 actionModeCallback, ActionMode.TYPE_FLOATING); 2067 if (mTextActionMode != null && getInsertionController() != null) { 2068 getInsertionController().show(); 2069 } 2070 } 2071 2072 @NonNull 2073 TextView getTextView() { 2074 return mTextView; 2075 } 2076 2077 @Nullable 2078 ActionMode getTextActionMode() { 2079 return mTextActionMode; 2080 } 2081 2082 void setRestartActionModeOnNextRefresh(boolean value) { 2083 mRestartActionModeOnNextRefresh = value; 2084 } 2085 2086 /** 2087 * Asynchronously starts a selection action mode using the TextClassifier. 2088 */ 2089 void startSelectionActionModeAsync(boolean adjustSelection) { 2090 getSelectionActionModeHelper().startSelectionActionModeAsync(adjustSelection); 2091 } 2092 2093 void startLinkActionModeAsync(TextLinks.TextLink link) { 2094 Preconditions.checkNotNull(link); 2095 if (!(mTextView.getText() instanceof Spannable)) { 2096 return; 2097 } 2098 stopTextActionMode(); 2099 getSelectionActionModeHelper().startLinkActionModeAsync(link); 2100 } 2101 2102 /** 2103 * Asynchronously invalidates an action mode using the TextClassifier. 2104 */ 2105 void invalidateActionModeAsync() { 2106 getSelectionActionModeHelper().invalidateActionModeAsync(); 2107 } 2108 2109 /** 2110 * Synchronously invalidates an action mode without the TextClassifier. 2111 */ 2112 private void invalidateActionMode() { 2113 if (mTextActionMode != null) { 2114 mTextActionMode.invalidate(); 2115 } 2116 } 2117 2118 private SelectionActionModeHelper getSelectionActionModeHelper() { 2119 if (mSelectionActionModeHelper == null) { 2120 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2121 } 2122 return mSelectionActionModeHelper; 2123 } 2124 2125 /** 2126 * If the TextView allows text selection, selects the current word when no existing selection 2127 * was available and starts a drag. 2128 * 2129 * @return true if the drag was started. 2130 */ 2131 private boolean selectCurrentWordAndStartDrag() { 2132 if (mInsertionActionModeRunnable != null) { 2133 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2134 } 2135 if (extractedTextModeWillBeStarted()) { 2136 return false; 2137 } 2138 if (!checkField()) { 2139 return false; 2140 } 2141 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2142 // No selection and cannot select a word. 2143 return false; 2144 } 2145 stopTextActionModeWithPreservingSelection(); 2146 getSelectionController().enterDrag( 2147 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2148 return true; 2149 } 2150 2151 /** 2152 * Checks whether a selection can be performed on the current TextView. 2153 * 2154 * @return true if a selection can be performed 2155 */ 2156 boolean checkField() { 2157 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2158 Log.w(TextView.LOG_TAG, 2159 "TextView does not support text selection. Selection cancelled."); 2160 return false; 2161 } 2162 return true; 2163 } 2164 2165 boolean startActionModeInternal(@TextActionMode int actionMode) { 2166 if (extractedTextModeWillBeStarted()) { 2167 return false; 2168 } 2169 if (mTextActionMode != null) { 2170 // Text action mode is already started 2171 invalidateActionMode(); 2172 return false; 2173 } 2174 2175 if (actionMode != TextActionMode.TEXT_LINK 2176 && (!checkField() || !mTextView.hasSelection())) { 2177 return false; 2178 } 2179 2180 ActionMode.Callback actionModeCallback = new TextActionModeCallback(actionMode); 2181 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2182 2183 final boolean selectionStarted = mTextActionMode != null; 2184 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 2185 // Show the IME to be able to replace text, except when selecting non editable text. 2186 final InputMethodManager imm = InputMethodManager.peekInstance(); 2187 if (imm != null) { 2188 imm.showSoftInput(mTextView, 0, null); 2189 } 2190 } 2191 return selectionStarted; 2192 } 2193 2194 private boolean extractedTextModeWillBeStarted() { 2195 if (!(mTextView.isInExtractedMode())) { 2196 final InputMethodManager imm = InputMethodManager.peekInstance(); 2197 return imm != null && imm.isFullscreenMode(); 2198 } 2199 return false; 2200 } 2201 2202 /** 2203 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2204 * the current cursor position or selection range. This method is consistent with the 2205 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2206 */ 2207 private boolean shouldOfferToShowSuggestions() { 2208 CharSequence text = mTextView.getText(); 2209 if (!(text instanceof Spannable)) return false; 2210 2211 final Spannable spannable = (Spannable) text; 2212 final int selectionStart = mTextView.getSelectionStart(); 2213 final int selectionEnd = mTextView.getSelectionEnd(); 2214 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2215 SuggestionSpan.class); 2216 if (suggestionSpans.length == 0) { 2217 return false; 2218 } 2219 if (selectionStart == selectionEnd) { 2220 // Spans overlap the cursor. 2221 for (int i = 0; i < suggestionSpans.length; i++) { 2222 if (suggestionSpans[i].getSuggestions().length > 0) { 2223 return true; 2224 } 2225 } 2226 return false; 2227 } 2228 int minSpanStart = mTextView.getText().length(); 2229 int maxSpanEnd = 0; 2230 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2231 int unionOfSpansCoveringSelectionStartEnd = 0; 2232 boolean hasValidSuggestions = false; 2233 for (int i = 0; i < suggestionSpans.length; i++) { 2234 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2235 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2236 minSpanStart = Math.min(minSpanStart, spanStart); 2237 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2238 if (selectionStart < spanStart || selectionStart > spanEnd) { 2239 // The span doesn't cover the current selection start point. 2240 continue; 2241 } 2242 hasValidSuggestions = 2243 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2244 unionOfSpansCoveringSelectionStartStart = 2245 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2246 unionOfSpansCoveringSelectionStartEnd = 2247 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2248 } 2249 if (!hasValidSuggestions) { 2250 return false; 2251 } 2252 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2253 // No spans cover the selection start point. 2254 return false; 2255 } 2256 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2257 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2258 // There is a span that is not covered by the union. In this case, we soouldn't offer 2259 // to show suggestions as it's confusing. 2260 return false; 2261 } 2262 return true; 2263 } 2264 2265 /** 2266 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2267 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2268 */ 2269 private boolean isCursorInsideEasyCorrectionSpan() { 2270 Spannable spannable = (Spannable) mTextView.getText(); 2271 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2272 mTextView.getSelectionEnd(), SuggestionSpan.class); 2273 for (int i = 0; i < suggestionSpans.length; i++) { 2274 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2275 return true; 2276 } 2277 } 2278 return false; 2279 } 2280 2281 void onTouchUpEvent(MotionEvent event) { 2282 if (getSelectionActionModeHelper().resetSelection( 2283 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2284 return; 2285 } 2286 2287 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2288 hideCursorAndSpanControllers(); 2289 stopTextActionMode(); 2290 CharSequence text = mTextView.getText(); 2291 if (!selectAllGotFocus && text.length() > 0) { 2292 // Move cursor 2293 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2294 Selection.setSelection((Spannable) text, offset); 2295 if (mSpellChecker != null) { 2296 // When the cursor moves, the word that was typed may need spell check 2297 mSpellChecker.onSelectionChanged(); 2298 } 2299 2300 if (!extractedTextModeWillBeStarted()) { 2301 if (isCursorInsideEasyCorrectionSpan()) { 2302 // Cancel the single tap delayed runnable. 2303 if (mInsertionActionModeRunnable != null) { 2304 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2305 } 2306 2307 mShowSuggestionRunnable = new Runnable() { 2308 public void run() { 2309 replace(); 2310 } 2311 }; 2312 // removeCallbacks is performed on every touch 2313 mTextView.postDelayed(mShowSuggestionRunnable, 2314 ViewConfiguration.getDoubleTapTimeout()); 2315 } else if (hasInsertionController()) { 2316 getInsertionController().show(); 2317 } 2318 } 2319 } 2320 } 2321 2322 protected void stopTextActionMode() { 2323 if (mTextActionMode != null) { 2324 // This will hide the mSelectionModifierCursorController 2325 mTextActionMode.finish(); 2326 } 2327 } 2328 2329 private void stopTextActionModeWithPreservingSelection() { 2330 if (mTextActionMode != null) { 2331 mRestartActionModeOnNextRefresh = true; 2332 } 2333 mPreserveSelection = true; 2334 stopTextActionMode(); 2335 mPreserveSelection = false; 2336 } 2337 2338 /** 2339 * @return True if this view supports insertion handles. 2340 */ 2341 boolean hasInsertionController() { 2342 return mInsertionControllerEnabled; 2343 } 2344 2345 /** 2346 * @return True if this view supports selection handles. 2347 */ 2348 boolean hasSelectionController() { 2349 return mSelectionControllerEnabled; 2350 } 2351 2352 private InsertionPointCursorController getInsertionController() { 2353 if (!mInsertionControllerEnabled) { 2354 return null; 2355 } 2356 2357 if (mInsertionPointCursorController == null) { 2358 mInsertionPointCursorController = new InsertionPointCursorController(); 2359 2360 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2361 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2362 } 2363 2364 return mInsertionPointCursorController; 2365 } 2366 2367 @Nullable 2368 SelectionModifierCursorController getSelectionController() { 2369 if (!mSelectionControllerEnabled) { 2370 return null; 2371 } 2372 2373 if (mSelectionModifierCursorController == null) { 2374 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2375 2376 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2377 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2378 } 2379 2380 return mSelectionModifierCursorController; 2381 } 2382 2383 @VisibleForTesting 2384 @Nullable 2385 public Drawable getCursorDrawable() { 2386 return mDrawableForCursor; 2387 } 2388 2389 private void updateCursorPosition(int top, int bottom, float horizontal) { 2390 if (mDrawableForCursor == null) { 2391 mDrawableForCursor = mTextView.getContext().getDrawable( 2392 mTextView.mCursorDrawableRes); 2393 } 2394 final int left = clampHorizontalPosition(mDrawableForCursor, horizontal); 2395 final int width = mDrawableForCursor.getIntrinsicWidth(); 2396 mDrawableForCursor.setBounds(left, top - mTempRect.top, left + width, 2397 bottom + mTempRect.bottom); 2398 } 2399 2400 /** 2401 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2402 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2403 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2404 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2405 * of the view. 2406 * 2407 * @param drawable Drawable. Can be null. 2408 * @param horizontal Horizontal position for the drawable. 2409 * @return The clamped horizontal position for the drawable. 2410 */ 2411 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2412 horizontal = Math.max(0.5f, horizontal - 0.5f); 2413 if (mTempRect == null) mTempRect = new Rect(); 2414 2415 int drawableWidth = 0; 2416 if (drawable != null) { 2417 drawable.getPadding(mTempRect); 2418 drawableWidth = drawable.getIntrinsicWidth(); 2419 } else { 2420 mTempRect.setEmpty(); 2421 } 2422 2423 int scrollX = mTextView.getScrollX(); 2424 float horizontalDiff = horizontal - scrollX; 2425 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2426 - mTextView.getCompoundPaddingRight(); 2427 2428 final int left; 2429 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2430 // at the rightmost position 2431 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2432 } else if (Math.abs(horizontalDiff) <= 1f 2433 || (TextUtils.isEmpty(mTextView.getText()) 2434 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2435 && horizontal <= 1f)) { 2436 // at the leftmost position 2437 left = scrollX - mTempRect.left; 2438 } else { 2439 left = (int) horizontal - mTempRect.left; 2440 } 2441 return left; 2442 } 2443 2444 /** 2445 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2446 * a dictionary) from the current input method, provided by it calling 2447 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2448 * implementation flashes the background of the corrected word to provide feedback to the user. 2449 * 2450 * @param info The auto correct info about the text that was corrected. 2451 */ 2452 public void onCommitCorrection(CorrectionInfo info) { 2453 if (mCorrectionHighlighter == null) { 2454 mCorrectionHighlighter = new CorrectionHighlighter(); 2455 } else { 2456 mCorrectionHighlighter.invalidate(false); 2457 } 2458 2459 mCorrectionHighlighter.highlight(info); 2460 mUndoInputFilter.freezeLastEdit(); 2461 } 2462 2463 void onScrollChanged() { 2464 if (mPositionListener != null) { 2465 mPositionListener.onScrollChanged(); 2466 } 2467 if (mTextActionMode != null) { 2468 mTextActionMode.invalidateContentRect(); 2469 } 2470 } 2471 2472 /** 2473 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2474 */ 2475 private boolean shouldBlink() { 2476 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2477 2478 final int start = mTextView.getSelectionStart(); 2479 if (start < 0) return false; 2480 2481 final int end = mTextView.getSelectionEnd(); 2482 if (end < 0) return false; 2483 2484 return start == end; 2485 } 2486 2487 void makeBlink() { 2488 if (shouldBlink()) { 2489 mShowCursor = SystemClock.uptimeMillis(); 2490 if (mBlink == null) mBlink = new Blink(); 2491 mTextView.removeCallbacks(mBlink); 2492 mTextView.postDelayed(mBlink, BLINK); 2493 } else { 2494 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2495 } 2496 } 2497 2498 private class Blink implements Runnable { 2499 private boolean mCancelled; 2500 2501 public void run() { 2502 if (mCancelled) { 2503 return; 2504 } 2505 2506 mTextView.removeCallbacks(this); 2507 2508 if (shouldBlink()) { 2509 if (mTextView.getLayout() != null) { 2510 mTextView.invalidateCursorPath(); 2511 } 2512 2513 mTextView.postDelayed(this, BLINK); 2514 } 2515 } 2516 2517 void cancel() { 2518 if (!mCancelled) { 2519 mTextView.removeCallbacks(this); 2520 mCancelled = true; 2521 } 2522 } 2523 2524 void uncancel() { 2525 mCancelled = false; 2526 } 2527 } 2528 2529 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2530 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2531 com.android.internal.R.layout.text_drag_thumbnail, null); 2532 2533 if (shadowView == null) { 2534 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2535 } 2536 2537 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2538 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2539 end = TextUtils.unpackRangeEndFromLong(range); 2540 } 2541 final CharSequence text = mTextView.getTransformedText(start, end); 2542 shadowView.setText(text); 2543 shadowView.setTextColor(mTextView.getTextColors()); 2544 2545 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2546 shadowView.setGravity(Gravity.CENTER); 2547 2548 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2549 ViewGroup.LayoutParams.WRAP_CONTENT)); 2550 2551 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2552 shadowView.measure(size, size); 2553 2554 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2555 shadowView.invalidate(); 2556 return new DragShadowBuilder(shadowView); 2557 } 2558 2559 private static class DragLocalState { 2560 public TextView sourceTextView; 2561 public int start, end; 2562 2563 public DragLocalState(TextView sourceTextView, int start, int end) { 2564 this.sourceTextView = sourceTextView; 2565 this.start = start; 2566 this.end = end; 2567 } 2568 } 2569 2570 void onDrop(DragEvent event) { 2571 SpannableStringBuilder content = new SpannableStringBuilder(); 2572 2573 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2574 if (permissions != null) { 2575 permissions.takeTransient(); 2576 } 2577 2578 try { 2579 ClipData clipData = event.getClipData(); 2580 final int itemCount = clipData.getItemCount(); 2581 for (int i = 0; i < itemCount; i++) { 2582 Item item = clipData.getItemAt(i); 2583 content.append(item.coerceToStyledText(mTextView.getContext())); 2584 } 2585 } finally { 2586 if (permissions != null) { 2587 permissions.release(); 2588 } 2589 } 2590 2591 mTextView.beginBatchEdit(); 2592 mUndoInputFilter.freezeLastEdit(); 2593 try { 2594 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2595 Object localState = event.getLocalState(); 2596 DragLocalState dragLocalState = null; 2597 if (localState instanceof DragLocalState) { 2598 dragLocalState = (DragLocalState) localState; 2599 } 2600 boolean dragDropIntoItself = dragLocalState != null 2601 && dragLocalState.sourceTextView == mTextView; 2602 2603 if (dragDropIntoItself) { 2604 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2605 // A drop inside the original selection discards the drop. 2606 return; 2607 } 2608 } 2609 2610 final int originalLength = mTextView.getText().length(); 2611 int min = offset; 2612 int max = offset; 2613 2614 Selection.setSelection((Spannable) mTextView.getText(), max); 2615 mTextView.replaceText_internal(min, max, content); 2616 2617 if (dragDropIntoItself) { 2618 int dragSourceStart = dragLocalState.start; 2619 int dragSourceEnd = dragLocalState.end; 2620 if (max <= dragSourceStart) { 2621 // Inserting text before selection has shifted positions 2622 final int shift = mTextView.getText().length() - originalLength; 2623 dragSourceStart += shift; 2624 dragSourceEnd += shift; 2625 } 2626 2627 // Delete original selection 2628 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2629 2630 // Make sure we do not leave two adjacent spaces. 2631 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2632 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2633 if (nextCharIdx > prevCharIdx + 1) { 2634 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2635 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2636 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2637 } 2638 } 2639 } 2640 } finally { 2641 mTextView.endBatchEdit(); 2642 mUndoInputFilter.freezeLastEdit(); 2643 } 2644 } 2645 2646 public void addSpanWatchers(Spannable text) { 2647 final int textLength = text.length(); 2648 2649 if (mKeyListener != null) { 2650 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2651 } 2652 2653 if (mSpanController == null) { 2654 mSpanController = new SpanController(); 2655 } 2656 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2657 } 2658 2659 void setContextMenuAnchor(float x, float y) { 2660 mContextMenuAnchorX = x; 2661 mContextMenuAnchorY = y; 2662 } 2663 2664 void onCreateContextMenu(ContextMenu menu) { 2665 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2666 || Float.isNaN(mContextMenuAnchorY)) { 2667 return; 2668 } 2669 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2670 if (offset == -1) { 2671 return; 2672 } 2673 2674 stopTextActionModeWithPreservingSelection(); 2675 if (mTextView.canSelectText()) { 2676 final boolean isOnSelection = mTextView.hasSelection() 2677 && offset >= mTextView.getSelectionStart() 2678 && offset <= mTextView.getSelectionEnd(); 2679 if (!isOnSelection) { 2680 // Right clicked position is not on the selection. Remove the selection and move the 2681 // cursor to the right clicked position. 2682 Selection.setSelection((Spannable) mTextView.getText(), offset); 2683 stopTextActionMode(); 2684 } 2685 } 2686 2687 if (shouldOfferToShowSuggestions()) { 2688 final SuggestionInfo[] suggestionInfoArray = 2689 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2690 for (int i = 0; i < suggestionInfoArray.length; i++) { 2691 suggestionInfoArray[i] = new SuggestionInfo(); 2692 } 2693 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2694 com.android.internal.R.string.replace); 2695 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2696 for (int i = 0; i < numItems; i++) { 2697 final SuggestionInfo info = suggestionInfoArray[i]; 2698 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2699 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2700 @Override 2701 public boolean onMenuItemClick(MenuItem item) { 2702 replaceWithSuggestion(info); 2703 return true; 2704 } 2705 }); 2706 } 2707 } 2708 2709 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2710 com.android.internal.R.string.undo) 2711 .setAlphabeticShortcut('z') 2712 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2713 .setEnabled(mTextView.canUndo()); 2714 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2715 com.android.internal.R.string.redo) 2716 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2717 .setEnabled(mTextView.canRedo()); 2718 2719 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2720 com.android.internal.R.string.cut) 2721 .setAlphabeticShortcut('x') 2722 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2723 .setEnabled(mTextView.canCut()); 2724 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2725 com.android.internal.R.string.copy) 2726 .setAlphabeticShortcut('c') 2727 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2728 .setEnabled(mTextView.canCopy()); 2729 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2730 com.android.internal.R.string.paste) 2731 .setAlphabeticShortcut('v') 2732 .setEnabled(mTextView.canPaste()) 2733 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2734 menu.add(Menu.NONE, TextView.ID_PASTE_AS_PLAIN_TEXT, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2735 com.android.internal.R.string.paste_as_plain_text) 2736 .setEnabled(mTextView.canPasteAsPlainText()) 2737 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2738 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2739 com.android.internal.R.string.share) 2740 .setEnabled(mTextView.canShare()) 2741 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2742 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2743 com.android.internal.R.string.selectAll) 2744 .setAlphabeticShortcut('a') 2745 .setEnabled(mTextView.canSelectAllText()) 2746 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2747 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2748 android.R.string.autofill) 2749 .setEnabled(mTextView.canRequestAutofill()) 2750 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2751 2752 mPreserveSelection = true; 2753 } 2754 2755 @Nullable 2756 private SuggestionSpan findEquivalentSuggestionSpan( 2757 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2758 final Editable editable = (Editable) mTextView.getText(); 2759 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2760 // Exactly same span is found. 2761 return suggestionSpanInfo.mSuggestionSpan; 2762 } 2763 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2764 // contents. 2765 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2766 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2767 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2768 final int start = editable.getSpanStart(suggestionSpan); 2769 if (start != suggestionSpanInfo.mSpanStart) { 2770 continue; 2771 } 2772 final int end = editable.getSpanEnd(suggestionSpan); 2773 if (end != suggestionSpanInfo.mSpanEnd) { 2774 continue; 2775 } 2776 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2777 return suggestionSpan; 2778 } 2779 } 2780 return null; 2781 } 2782 2783 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2784 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2785 suggestionInfo.mSuggestionSpanInfo); 2786 if (targetSuggestionSpan == null) { 2787 // Span has been removed 2788 return; 2789 } 2790 final Editable editable = (Editable) mTextView.getText(); 2791 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2792 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2793 if (spanStart < 0 || spanEnd <= spanStart) { 2794 // Span has been removed 2795 return; 2796 } 2797 2798 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2799 // SuggestionSpans are removed by replace: save them before 2800 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2801 SuggestionSpan.class); 2802 final int length = suggestionSpans.length; 2803 int[] suggestionSpansStarts = new int[length]; 2804 int[] suggestionSpansEnds = new int[length]; 2805 int[] suggestionSpansFlags = new int[length]; 2806 for (int i = 0; i < length; i++) { 2807 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2808 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2809 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2810 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2811 2812 // Remove potential misspelled flags 2813 int suggestionSpanFlags = suggestionSpan.getFlags(); 2814 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2815 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2816 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2817 suggestionSpan.setFlags(suggestionSpanFlags); 2818 } 2819 } 2820 2821 // Notify source IME of the suggestion pick. Do this before swapping texts. 2822 targetSuggestionSpan.notifySelection( 2823 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2824 2825 // Swap text content between actual text and Suggestion span 2826 final int suggestionStart = suggestionInfo.mSuggestionStart; 2827 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2828 final String suggestion = suggestionInfo.mText.subSequence( 2829 suggestionStart, suggestionEnd).toString(); 2830 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2831 2832 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2833 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2834 2835 // Restore previous SuggestionSpans 2836 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2837 for (int i = 0; i < length; i++) { 2838 // Only spans that include the modified region make sense after replacement 2839 // Spans partially included in the replaced region are removed, there is no 2840 // way to assign them a valid range after replacement 2841 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2842 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2843 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2844 } 2845 } 2846 // Move cursor at the end of the replaced word 2847 final int newCursorPosition = spanEnd + lengthDelta; 2848 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2849 } 2850 2851 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2852 new MenuItem.OnMenuItemClickListener() { 2853 @Override 2854 public boolean onMenuItemClick(MenuItem item) { 2855 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2856 return true; 2857 } 2858 return mTextView.onTextContextMenuItem(item.getItemId()); 2859 } 2860 }; 2861 2862 /** 2863 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2864 * pop-up should be displayed. 2865 * Also monitors {@link Selection} to call back to the attached input method. 2866 */ 2867 private class SpanController implements SpanWatcher { 2868 2869 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2870 2871 private EasyEditPopupWindow mPopupWindow; 2872 2873 private Runnable mHidePopup; 2874 2875 // This function is pure but inner classes can't have static functions 2876 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2877 final Object span) { 2878 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2879 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2880 } 2881 2882 @Override 2883 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2884 if (isNonIntermediateSelectionSpan(text, span)) { 2885 sendUpdateSelection(); 2886 } else if (span instanceof EasyEditSpan) { 2887 if (mPopupWindow == null) { 2888 mPopupWindow = new EasyEditPopupWindow(); 2889 mHidePopup = new Runnable() { 2890 @Override 2891 public void run() { 2892 hide(); 2893 } 2894 }; 2895 } 2896 2897 // Make sure there is only at most one EasyEditSpan in the text 2898 if (mPopupWindow.mEasyEditSpan != null) { 2899 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2900 } 2901 2902 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2903 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2904 @Override 2905 public void onDeleteClick(EasyEditSpan span) { 2906 Editable editable = (Editable) mTextView.getText(); 2907 int start = editable.getSpanStart(span); 2908 int end = editable.getSpanEnd(span); 2909 if (start >= 0 && end >= 0) { 2910 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2911 mTextView.deleteText_internal(start, end); 2912 } 2913 editable.removeSpan(span); 2914 } 2915 }); 2916 2917 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2918 // The window is not visible yet, ignore the text change. 2919 return; 2920 } 2921 2922 if (mTextView.getLayout() == null) { 2923 // The view has not been laid out yet, ignore the text change 2924 return; 2925 } 2926 2927 if (extractedTextModeWillBeStarted()) { 2928 // The input is in extract mode. Do not handle the easy edit in 2929 // the original TextView, as the ExtractEditText will do 2930 return; 2931 } 2932 2933 mPopupWindow.show(); 2934 mTextView.removeCallbacks(mHidePopup); 2935 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2936 } 2937 } 2938 2939 @Override 2940 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2941 if (isNonIntermediateSelectionSpan(text, span)) { 2942 sendUpdateSelection(); 2943 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2944 hide(); 2945 } 2946 } 2947 2948 @Override 2949 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2950 int newStart, int newEnd) { 2951 if (isNonIntermediateSelectionSpan(text, span)) { 2952 sendUpdateSelection(); 2953 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2954 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2955 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2956 text.removeSpan(easyEditSpan); 2957 } 2958 } 2959 2960 public void hide() { 2961 if (mPopupWindow != null) { 2962 mPopupWindow.hide(); 2963 mTextView.removeCallbacks(mHidePopup); 2964 } 2965 } 2966 2967 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2968 try { 2969 PendingIntent pendingIntent = span.getPendingIntent(); 2970 if (pendingIntent != null) { 2971 Intent intent = new Intent(); 2972 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2973 pendingIntent.send(mTextView.getContext(), 0, intent); 2974 } 2975 } catch (CanceledException e) { 2976 // This should not happen, as we should try to send the intent only once. 2977 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2978 } 2979 } 2980 } 2981 2982 /** 2983 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2984 */ 2985 private interface EasyEditDeleteListener { 2986 2987 /** 2988 * Clicks the delete pop-up. 2989 */ 2990 void onDeleteClick(EasyEditSpan span); 2991 } 2992 2993 /** 2994 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2995 * by {@link SpanController}. 2996 */ 2997 private class EasyEditPopupWindow extends PinnedPopupWindow 2998 implements OnClickListener { 2999 private static final int POPUP_TEXT_LAYOUT = 3000 com.android.internal.R.layout.text_edit_action_popup_text; 3001 private TextView mDeleteTextView; 3002 private EasyEditSpan mEasyEditSpan; 3003 private EasyEditDeleteListener mOnDeleteListener; 3004 3005 @Override 3006 protected void createPopupWindow() { 3007 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 3008 com.android.internal.R.attr.textSelectHandleWindowStyle); 3009 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3010 mPopupWindow.setClippingEnabled(true); 3011 } 3012 3013 @Override 3014 protected void initContentView() { 3015 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 3016 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 3017 mContentView = linearLayout; 3018 mContentView.setBackgroundResource( 3019 com.android.internal.R.drawable.text_edit_side_paste_window); 3020 3021 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 3022 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 3023 3024 LayoutParams wrapContent = new LayoutParams( 3025 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 3026 3027 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 3028 mDeleteTextView.setLayoutParams(wrapContent); 3029 mDeleteTextView.setText(com.android.internal.R.string.delete); 3030 mDeleteTextView.setOnClickListener(this); 3031 mContentView.addView(mDeleteTextView); 3032 } 3033 3034 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 3035 mEasyEditSpan = easyEditSpan; 3036 } 3037 3038 private void setOnDeleteListener(EasyEditDeleteListener listener) { 3039 mOnDeleteListener = listener; 3040 } 3041 3042 @Override 3043 public void onClick(View view) { 3044 if (view == mDeleteTextView 3045 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 3046 && mOnDeleteListener != null) { 3047 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 3048 } 3049 } 3050 3051 @Override 3052 public void hide() { 3053 if (mEasyEditSpan != null) { 3054 mEasyEditSpan.setDeleteEnabled(false); 3055 } 3056 mOnDeleteListener = null; 3057 super.hide(); 3058 } 3059 3060 @Override 3061 protected int getTextOffset() { 3062 // Place the pop-up at the end of the span 3063 Editable editable = (Editable) mTextView.getText(); 3064 return editable.getSpanEnd(mEasyEditSpan); 3065 } 3066 3067 @Override 3068 protected int getVerticalLocalPosition(int line) { 3069 final Layout layout = mTextView.getLayout(); 3070 return layout.getLineBottomWithoutSpacing(line); 3071 } 3072 3073 @Override 3074 protected int clipVertically(int positionY) { 3075 // As we display the pop-up below the span, no vertical clipping is required. 3076 return positionY; 3077 } 3078 } 3079 3080 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 3081 // 3 handles 3082 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 3083 // 1 CursorAnchorInfoNotifier 3084 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 3085 private TextViewPositionListener[] mPositionListeners = 3086 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 3087 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 3088 private boolean mPositionHasChanged = true; 3089 // Absolute position of the TextView with respect to its parent window 3090 private int mPositionX, mPositionY; 3091 private int mPositionXOnScreen, mPositionYOnScreen; 3092 private int mNumberOfListeners; 3093 private boolean mScrollHasChanged; 3094 final int[] mTempCoords = new int[2]; 3095 3096 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 3097 if (mNumberOfListeners == 0) { 3098 updatePosition(); 3099 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3100 vto.addOnPreDrawListener(this); 3101 } 3102 3103 int emptySlotIndex = -1; 3104 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3105 TextViewPositionListener listener = mPositionListeners[i]; 3106 if (listener == positionListener) { 3107 return; 3108 } else if (emptySlotIndex < 0 && listener == null) { 3109 emptySlotIndex = i; 3110 } 3111 } 3112 3113 mPositionListeners[emptySlotIndex] = positionListener; 3114 mCanMove[emptySlotIndex] = canMove; 3115 mNumberOfListeners++; 3116 } 3117 3118 public void removeSubscriber(TextViewPositionListener positionListener) { 3119 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3120 if (mPositionListeners[i] == positionListener) { 3121 mPositionListeners[i] = null; 3122 mNumberOfListeners--; 3123 break; 3124 } 3125 } 3126 3127 if (mNumberOfListeners == 0) { 3128 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3129 vto.removeOnPreDrawListener(this); 3130 } 3131 } 3132 3133 public int getPositionX() { 3134 return mPositionX; 3135 } 3136 3137 public int getPositionY() { 3138 return mPositionY; 3139 } 3140 3141 public int getPositionXOnScreen() { 3142 return mPositionXOnScreen; 3143 } 3144 3145 public int getPositionYOnScreen() { 3146 return mPositionYOnScreen; 3147 } 3148 3149 @Override 3150 public boolean onPreDraw() { 3151 updatePosition(); 3152 3153 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3154 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3155 TextViewPositionListener positionListener = mPositionListeners[i]; 3156 if (positionListener != null) { 3157 positionListener.updatePosition(mPositionX, mPositionY, 3158 mPositionHasChanged, mScrollHasChanged); 3159 } 3160 } 3161 } 3162 3163 mScrollHasChanged = false; 3164 return true; 3165 } 3166 3167 private void updatePosition() { 3168 mTextView.getLocationInWindow(mTempCoords); 3169 3170 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3171 3172 mPositionX = mTempCoords[0]; 3173 mPositionY = mTempCoords[1]; 3174 3175 mTextView.getLocationOnScreen(mTempCoords); 3176 3177 mPositionXOnScreen = mTempCoords[0]; 3178 mPositionYOnScreen = mTempCoords[1]; 3179 } 3180 3181 public void onScrollChanged() { 3182 mScrollHasChanged = true; 3183 } 3184 } 3185 3186 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3187 protected PopupWindow mPopupWindow; 3188 protected ViewGroup mContentView; 3189 int mPositionX, mPositionY; 3190 int mClippingLimitLeft, mClippingLimitRight; 3191 3192 protected abstract void createPopupWindow(); 3193 protected abstract void initContentView(); 3194 protected abstract int getTextOffset(); 3195 protected abstract int getVerticalLocalPosition(int line); 3196 protected abstract int clipVertically(int positionY); 3197 protected void setUp() { 3198 } 3199 3200 public PinnedPopupWindow() { 3201 // Due to calling subclass methods in base constructor, subclass constructor is not 3202 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3203 // a chance to initialize subclasses, call setUp() method here. 3204 // TODO: It is good to extract non trivial initialization code from constructor. 3205 setUp(); 3206 3207 createPopupWindow(); 3208 3209 mPopupWindow.setWindowLayoutType( 3210 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3211 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3212 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3213 3214 initContentView(); 3215 3216 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3217 ViewGroup.LayoutParams.WRAP_CONTENT); 3218 mContentView.setLayoutParams(wrapContent); 3219 3220 mPopupWindow.setContentView(mContentView); 3221 } 3222 3223 public void show() { 3224 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3225 3226 computeLocalPosition(); 3227 3228 final PositionListener positionListener = getPositionListener(); 3229 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3230 } 3231 3232 protected void measureContent() { 3233 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3234 mContentView.measure( 3235 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3236 View.MeasureSpec.AT_MOST), 3237 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3238 View.MeasureSpec.AT_MOST)); 3239 } 3240 3241 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3242 * positioned according to viewportToContentHorizontalOffset. 3243 * 3244 * This method assumes that mContentView has properly been measured from its content. */ 3245 private void computeLocalPosition() { 3246 measureContent(); 3247 final int width = mContentView.getMeasuredWidth(); 3248 final int offset = getTextOffset(); 3249 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3250 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3251 3252 final int line = mTextView.getLayout().getLineForOffset(offset); 3253 mPositionY = getVerticalLocalPosition(line); 3254 mPositionY += mTextView.viewportToContentVerticalOffset(); 3255 } 3256 3257 private void updatePosition(int parentPositionX, int parentPositionY) { 3258 int positionX = parentPositionX + mPositionX; 3259 int positionY = parentPositionY + mPositionY; 3260 3261 positionY = clipVertically(positionY); 3262 3263 // Horizontal clipping 3264 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3265 final int width = mContentView.getMeasuredWidth(); 3266 positionX = Math.min( 3267 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3268 positionX = Math.max(-mClippingLimitLeft, positionX); 3269 3270 if (isShowing()) { 3271 mPopupWindow.update(positionX, positionY, -1, -1); 3272 } else { 3273 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3274 positionX, positionY); 3275 } 3276 } 3277 3278 public void hide() { 3279 if (!isShowing()) { 3280 return; 3281 } 3282 mPopupWindow.dismiss(); 3283 getPositionListener().removeSubscriber(this); 3284 } 3285 3286 @Override 3287 public void updatePosition(int parentPositionX, int parentPositionY, 3288 boolean parentPositionChanged, boolean parentScrolled) { 3289 // Either parentPositionChanged or parentScrolled is true, check if still visible 3290 if (isShowing() && isOffsetVisible(getTextOffset())) { 3291 if (parentScrolled) computeLocalPosition(); 3292 updatePosition(parentPositionX, parentPositionY); 3293 } else { 3294 hide(); 3295 } 3296 } 3297 3298 public boolean isShowing() { 3299 return mPopupWindow.isShowing(); 3300 } 3301 } 3302 3303 private static final class SuggestionInfo { 3304 // Range of actual suggestion within mText 3305 int mSuggestionStart, mSuggestionEnd; 3306 3307 // The SuggestionSpan that this TextView represents 3308 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3309 3310 // The index of this suggestion inside suggestionSpan 3311 int mSuggestionIndex; 3312 3313 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3314 3315 void clear() { 3316 mSuggestionSpanInfo.clear(); 3317 mText.clear(); 3318 } 3319 3320 // Utility method to set attributes about a SuggestionSpan. 3321 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3322 mSuggestionSpanInfo.mSuggestionSpan = span; 3323 mSuggestionSpanInfo.mSpanStart = spanStart; 3324 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3325 } 3326 } 3327 3328 private static final class SuggestionSpanInfo { 3329 // The SuggestionSpan; 3330 @Nullable 3331 SuggestionSpan mSuggestionSpan; 3332 3333 // The SuggestionSpan start position 3334 int mSpanStart; 3335 3336 // The SuggestionSpan end position 3337 int mSpanEnd; 3338 3339 void clear() { 3340 mSuggestionSpan = null; 3341 } 3342 } 3343 3344 private class SuggestionHelper { 3345 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3346 new SuggestionSpanComparator(); 3347 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3348 new HashMap<SuggestionSpan, Integer>(); 3349 3350 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3351 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3352 final int flag1 = span1.getFlags(); 3353 final int flag2 = span2.getFlags(); 3354 if (flag1 != flag2) { 3355 // The order here should match what is used in updateDrawState 3356 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3357 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3358 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3359 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3360 if (easy1 && !misspelled1) return -1; 3361 if (easy2 && !misspelled2) return 1; 3362 if (misspelled1) return -1; 3363 if (misspelled2) return 1; 3364 } 3365 3366 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3367 } 3368 } 3369 3370 /** 3371 * Returns the suggestion spans that cover the current cursor position. The suggestion 3372 * spans are sorted according to the length of text that they are attached to. 3373 */ 3374 private SuggestionSpan[] getSortedSuggestionSpans() { 3375 int pos = mTextView.getSelectionStart(); 3376 Spannable spannable = (Spannable) mTextView.getText(); 3377 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3378 3379 mSpansLengths.clear(); 3380 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3381 int start = spannable.getSpanStart(suggestionSpan); 3382 int end = spannable.getSpanEnd(suggestionSpan); 3383 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3384 } 3385 3386 // The suggestions are sorted according to their types (easy correction first, then 3387 // misspelled) and to the length of the text that they cover (shorter first). 3388 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3389 mSpansLengths.clear(); 3390 3391 return suggestionSpans; 3392 } 3393 3394 /** 3395 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3396 * position. 3397 * 3398 * @param suggestionInfos SuggestionInfo array the results will be set. 3399 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3400 * @return the number of suggestions actually fetched. 3401 */ 3402 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3403 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3404 final Spannable spannable = (Spannable) mTextView.getText(); 3405 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3406 final int nbSpans = suggestionSpans.length; 3407 if (nbSpans == 0) return 0; 3408 3409 int numberOfSuggestions = 0; 3410 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3411 final int spanStart = spannable.getSpanStart(suggestionSpan); 3412 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3413 3414 if (misspelledSpanInfo != null 3415 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3416 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3417 misspelledSpanInfo.mSpanStart = spanStart; 3418 misspelledSpanInfo.mSpanEnd = spanEnd; 3419 } 3420 3421 final String[] suggestions = suggestionSpan.getSuggestions(); 3422 final int nbSuggestions = suggestions.length; 3423 suggestionLoop: 3424 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3425 final String suggestion = suggestions[suggestionIndex]; 3426 for (int i = 0; i < numberOfSuggestions; i++) { 3427 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3428 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3429 final int otherSpanStart = 3430 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3431 final int otherSpanEnd = 3432 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3433 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3434 continue suggestionLoop; 3435 } 3436 } 3437 } 3438 3439 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3440 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3441 suggestionInfo.mSuggestionIndex = suggestionIndex; 3442 suggestionInfo.mSuggestionStart = 0; 3443 suggestionInfo.mSuggestionEnd = suggestion.length(); 3444 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3445 numberOfSuggestions++; 3446 if (numberOfSuggestions >= suggestionInfos.length) { 3447 return numberOfSuggestions; 3448 } 3449 } 3450 } 3451 return numberOfSuggestions; 3452 } 3453 } 3454 3455 @VisibleForTesting 3456 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3457 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3458 3459 // Key of intent extras for inserting new word into user dictionary. 3460 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3461 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3462 3463 private SuggestionInfo[] mSuggestionInfos; 3464 private int mNumberOfSuggestions; 3465 private boolean mCursorWasVisibleBeforeSuggestions; 3466 private boolean mIsShowingUp = false; 3467 private SuggestionAdapter mSuggestionsAdapter; 3468 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3469 private TextView mAddToDictionaryButton; 3470 private TextView mDeleteButton; 3471 private ListView mSuggestionListView; 3472 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3473 private int mContainerMarginWidth; 3474 private int mContainerMarginTop; 3475 private LinearLayout mContainerView; 3476 private Context mContext; // TODO: Make mContext final. 3477 3478 private class CustomPopupWindow extends PopupWindow { 3479 3480 @Override 3481 public void dismiss() { 3482 if (!isShowing()) { 3483 return; 3484 } 3485 super.dismiss(); 3486 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3487 3488 // Safe cast since show() checks that mTextView.getText() is an Editable 3489 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3490 3491 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3492 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3493 getInsertionController().show(); 3494 } 3495 } 3496 } 3497 3498 public SuggestionsPopupWindow() { 3499 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3500 } 3501 3502 @Override 3503 protected void setUp() { 3504 mContext = applyDefaultTheme(mTextView.getContext()); 3505 mHighlightSpan = new TextAppearanceSpan(mContext, 3506 mTextView.mTextEditSuggestionHighlightStyle); 3507 } 3508 3509 private Context applyDefaultTheme(Context originalContext) { 3510 TypedArray a = originalContext.obtainStyledAttributes( 3511 new int[]{com.android.internal.R.attr.isLightTheme}); 3512 boolean isLightTheme = a.getBoolean(0, true); 3513 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3514 : R.style.ThemeOverlay_Material_Dark; 3515 a.recycle(); 3516 return new ContextThemeWrapper(originalContext, themeId); 3517 } 3518 3519 @Override 3520 protected void createPopupWindow() { 3521 mPopupWindow = new CustomPopupWindow(); 3522 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3523 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3524 mPopupWindow.setFocusable(true); 3525 mPopupWindow.setClippingEnabled(false); 3526 } 3527 3528 @Override 3529 protected void initContentView() { 3530 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3531 Context.LAYOUT_INFLATER_SERVICE); 3532 mContentView = (ViewGroup) inflater.inflate( 3533 mTextView.mTextEditSuggestionContainerLayout, null); 3534 3535 mContainerView = (LinearLayout) mContentView.findViewById( 3536 com.android.internal.R.id.suggestionWindowContainer); 3537 ViewGroup.MarginLayoutParams lp = 3538 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3539 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3540 mContainerMarginTop = lp.topMargin; 3541 mClippingLimitLeft = lp.leftMargin; 3542 mClippingLimitRight = lp.rightMargin; 3543 3544 mSuggestionListView = (ListView) mContentView.findViewById( 3545 com.android.internal.R.id.suggestionContainer); 3546 3547 mSuggestionsAdapter = new SuggestionAdapter(); 3548 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3549 mSuggestionListView.setOnItemClickListener(this); 3550 3551 // Inflate the suggestion items once and for all. 3552 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3553 for (int i = 0; i < mSuggestionInfos.length; i++) { 3554 mSuggestionInfos[i] = new SuggestionInfo(); 3555 } 3556 3557 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3558 com.android.internal.R.id.addToDictionaryButton); 3559 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3560 public void onClick(View v) { 3561 final SuggestionSpan misspelledSpan = 3562 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3563 if (misspelledSpan == null) { 3564 // Span has been removed. 3565 return; 3566 } 3567 final Editable editable = (Editable) mTextView.getText(); 3568 final int spanStart = editable.getSpanStart(misspelledSpan); 3569 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3570 if (spanStart < 0 || spanEnd <= spanStart) { 3571 return; 3572 } 3573 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3574 3575 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3576 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3577 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3578 mTextView.getTextServicesLocale().toString()); 3579 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3580 mTextView.getContext().startActivity(intent); 3581 // There is no way to know if the word was indeed added. Re-check. 3582 // TODO The ExtractEditText should remove the span in the original text instead 3583 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3584 Selection.setSelection(editable, spanEnd); 3585 updateSpellCheckSpans(spanStart, spanEnd, false); 3586 hideWithCleanUp(); 3587 } 3588 }); 3589 3590 mDeleteButton = (TextView) mContentView.findViewById( 3591 com.android.internal.R.id.deleteButton); 3592 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3593 public void onClick(View v) { 3594 final Editable editable = (Editable) mTextView.getText(); 3595 3596 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3597 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3598 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3599 // Do not leave two adjacent spaces after deletion, or one at beginning of 3600 // text 3601 if (spanUnionEnd < editable.length() 3602 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3603 && (spanUnionStart == 0 3604 || Character.isSpaceChar( 3605 editable.charAt(spanUnionStart - 1)))) { 3606 spanUnionEnd = spanUnionEnd + 1; 3607 } 3608 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3609 } 3610 hideWithCleanUp(); 3611 } 3612 }); 3613 3614 } 3615 3616 public boolean isShowingUp() { 3617 return mIsShowingUp; 3618 } 3619 3620 public void onParentLostFocus() { 3621 mIsShowingUp = false; 3622 } 3623 3624 private class SuggestionAdapter extends BaseAdapter { 3625 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3626 Context.LAYOUT_INFLATER_SERVICE); 3627 3628 @Override 3629 public int getCount() { 3630 return mNumberOfSuggestions; 3631 } 3632 3633 @Override 3634 public Object getItem(int position) { 3635 return mSuggestionInfos[position]; 3636 } 3637 3638 @Override 3639 public long getItemId(int position) { 3640 return position; 3641 } 3642 3643 @Override 3644 public View getView(int position, View convertView, ViewGroup parent) { 3645 TextView textView = (TextView) convertView; 3646 3647 if (textView == null) { 3648 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3649 parent, false); 3650 } 3651 3652 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3653 textView.setText(suggestionInfo.mText); 3654 return textView; 3655 } 3656 } 3657 3658 @VisibleForTesting 3659 public ViewGroup getContentViewForTesting() { 3660 return mContentView; 3661 } 3662 3663 @Override 3664 public void show() { 3665 if (!(mTextView.getText() instanceof Editable)) return; 3666 if (extractedTextModeWillBeStarted()) { 3667 return; 3668 } 3669 3670 if (updateSuggestions()) { 3671 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3672 mTextView.setCursorVisible(false); 3673 mIsShowingUp = true; 3674 super.show(); 3675 } 3676 } 3677 3678 @Override 3679 protected void measureContent() { 3680 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3681 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3682 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3683 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3684 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3685 3686 int width = 0; 3687 View view = null; 3688 for (int i = 0; i < mNumberOfSuggestions; i++) { 3689 view = mSuggestionsAdapter.getView(i, view, mContentView); 3690 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3691 view.measure(horizontalMeasure, verticalMeasure); 3692 width = Math.max(width, view.getMeasuredWidth()); 3693 } 3694 3695 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3696 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3697 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3698 } 3699 3700 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3701 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3702 3703 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3704 + mContainerMarginWidth; 3705 3706 // Enforce the width based on actual text widths 3707 mContentView.measure( 3708 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3709 verticalMeasure); 3710 3711 Drawable popupBackground = mPopupWindow.getBackground(); 3712 if (popupBackground != null) { 3713 if (mTempRect == null) mTempRect = new Rect(); 3714 popupBackground.getPadding(mTempRect); 3715 width += mTempRect.left + mTempRect.right; 3716 } 3717 mPopupWindow.setWidth(width); 3718 } 3719 3720 @Override 3721 protected int getTextOffset() { 3722 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3723 } 3724 3725 @Override 3726 protected int getVerticalLocalPosition(int line) { 3727 final Layout layout = mTextView.getLayout(); 3728 return layout.getLineBottomWithoutSpacing(line) - mContainerMarginTop; 3729 } 3730 3731 @Override 3732 protected int clipVertically(int positionY) { 3733 final int height = mContentView.getMeasuredHeight(); 3734 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3735 return Math.min(positionY, displayMetrics.heightPixels - height); 3736 } 3737 3738 private void hideWithCleanUp() { 3739 for (final SuggestionInfo info : mSuggestionInfos) { 3740 info.clear(); 3741 } 3742 mMisspelledSpanInfo.clear(); 3743 hide(); 3744 } 3745 3746 private boolean updateSuggestions() { 3747 Spannable spannable = (Spannable) mTextView.getText(); 3748 mNumberOfSuggestions = 3749 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3750 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3751 return false; 3752 } 3753 3754 int spanUnionStart = mTextView.getText().length(); 3755 int spanUnionEnd = 0; 3756 3757 for (int i = 0; i < mNumberOfSuggestions; i++) { 3758 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3759 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3760 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3761 } 3762 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3763 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3764 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3765 } 3766 3767 for (int i = 0; i < mNumberOfSuggestions; i++) { 3768 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3769 } 3770 3771 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3772 int addToDictionaryButtonVisibility = View.GONE; 3773 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3774 if (mMisspelledSpanInfo.mSpanStart >= 0 3775 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3776 addToDictionaryButtonVisibility = View.VISIBLE; 3777 } 3778 } 3779 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3780 3781 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3782 final int underlineColor; 3783 if (mNumberOfSuggestions != 0) { 3784 underlineColor = 3785 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3786 } else { 3787 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3788 } 3789 3790 if (underlineColor == 0) { 3791 // Fallback on the default highlight color when the first span does not provide one 3792 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3793 } else { 3794 final float BACKGROUND_TRANSPARENCY = 0.4f; 3795 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3796 mSuggestionRangeSpan.setBackgroundColor( 3797 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3798 } 3799 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3800 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3801 3802 mSuggestionsAdapter.notifyDataSetChanged(); 3803 return true; 3804 } 3805 3806 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3807 int unionEnd) { 3808 final Spannable text = (Spannable) mTextView.getText(); 3809 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3810 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3811 3812 // Adjust the start/end of the suggestion span 3813 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3814 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3815 + suggestionInfo.mText.length(); 3816 3817 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3818 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3819 3820 // Add the text before and after the span. 3821 final String textAsString = text.toString(); 3822 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3823 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3824 } 3825 3826 @Override 3827 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3828 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3829 replaceWithSuggestion(suggestionInfo); 3830 hideWithCleanUp(); 3831 } 3832 } 3833 3834 /** 3835 * An ActionMode Callback class that is used to provide actions while in text insertion or 3836 * selection mode. 3837 * 3838 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3839 * actions, depending on which of these this TextView supports and the current selection. 3840 */ 3841 private class TextActionModeCallback extends ActionMode.Callback2 { 3842 private final Path mSelectionPath = new Path(); 3843 private final RectF mSelectionBounds = new RectF(); 3844 private final boolean mHasSelection; 3845 private final int mHandleHeight; 3846 private final Map<MenuItem, OnClickListener> mAssistClickHandlers = new HashMap<>(); 3847 3848 TextActionModeCallback(@TextActionMode int mode) { 3849 mHasSelection = mode == TextActionMode.SELECTION 3850 || (mTextIsSelectable && mode == TextActionMode.TEXT_LINK); 3851 if (mHasSelection) { 3852 SelectionModifierCursorController selectionController = getSelectionController(); 3853 if (selectionController.mStartHandle == null) { 3854 // As these are for initializing selectionController, hide() must be called. 3855 selectionController.initDrawables(); 3856 selectionController.initHandles(); 3857 selectionController.hide(); 3858 } 3859 mHandleHeight = Math.max( 3860 mSelectHandleLeft.getMinimumHeight(), 3861 mSelectHandleRight.getMinimumHeight()); 3862 } else { 3863 InsertionPointCursorController insertionController = getInsertionController(); 3864 if (insertionController != null) { 3865 insertionController.getHandle(); 3866 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3867 } else { 3868 mHandleHeight = 0; 3869 } 3870 } 3871 } 3872 3873 @Override 3874 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3875 mAssistClickHandlers.clear(); 3876 3877 mode.setTitle(null); 3878 mode.setSubtitle(null); 3879 mode.setTitleOptionalHint(true); 3880 populateMenuWithItems(menu); 3881 3882 Callback customCallback = getCustomCallback(); 3883 if (customCallback != null) { 3884 if (!customCallback.onCreateActionMode(mode, menu)) { 3885 // The custom mode can choose to cancel the action mode, dismiss selection. 3886 Selection.setSelection((Spannable) mTextView.getText(), 3887 mTextView.getSelectionEnd()); 3888 return false; 3889 } 3890 } 3891 3892 if (mTextView.canProcessText()) { 3893 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3894 } 3895 3896 if (mHasSelection && !mTextView.hasTransientState()) { 3897 mTextView.setHasTransientState(true); 3898 } 3899 return true; 3900 } 3901 3902 private Callback getCustomCallback() { 3903 return mHasSelection 3904 ? mCustomSelectionActionModeCallback 3905 : mCustomInsertionActionModeCallback; 3906 } 3907 3908 private void populateMenuWithItems(Menu menu) { 3909 if (mTextView.canCut()) { 3910 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3911 com.android.internal.R.string.cut) 3912 .setAlphabeticShortcut('x') 3913 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3914 } 3915 3916 if (mTextView.canCopy()) { 3917 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3918 com.android.internal.R.string.copy) 3919 .setAlphabeticShortcut('c') 3920 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3921 } 3922 3923 if (mTextView.canPaste()) { 3924 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3925 com.android.internal.R.string.paste) 3926 .setAlphabeticShortcut('v') 3927 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3928 } 3929 3930 if (mTextView.canShare()) { 3931 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3932 com.android.internal.R.string.share) 3933 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3934 } 3935 3936 if (mTextView.canRequestAutofill()) { 3937 final String selected = mTextView.getSelectedText(); 3938 if (selected == null || selected.isEmpty()) { 3939 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3940 com.android.internal.R.string.autofill) 3941 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 3942 } 3943 } 3944 3945 if (mTextView.canPasteAsPlainText()) { 3946 menu.add( 3947 Menu.NONE, 3948 TextView.ID_PASTE_AS_PLAIN_TEXT, 3949 MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 3950 com.android.internal.R.string.paste_as_plain_text) 3951 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3952 } 3953 3954 updateSelectAllItem(menu); 3955 updateReplaceItem(menu); 3956 updateAssistMenuItems(menu); 3957 } 3958 3959 @Override 3960 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3961 updateSelectAllItem(menu); 3962 updateReplaceItem(menu); 3963 updateAssistMenuItems(menu); 3964 3965 Callback customCallback = getCustomCallback(); 3966 if (customCallback != null) { 3967 return customCallback.onPrepareActionMode(mode, menu); 3968 } 3969 return true; 3970 } 3971 3972 private void updateSelectAllItem(Menu menu) { 3973 boolean canSelectAll = mTextView.canSelectAllText(); 3974 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3975 if (canSelectAll && !selectAllItemExists) { 3976 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3977 com.android.internal.R.string.selectAll) 3978 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3979 } else if (!canSelectAll && selectAllItemExists) { 3980 menu.removeItem(TextView.ID_SELECT_ALL); 3981 } 3982 } 3983 3984 private void updateReplaceItem(Menu menu) { 3985 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3986 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3987 if (canReplace && !replaceItemExists) { 3988 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3989 com.android.internal.R.string.replace) 3990 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3991 } else if (!canReplace && replaceItemExists) { 3992 menu.removeItem(TextView.ID_REPLACE); 3993 } 3994 } 3995 3996 private void updateAssistMenuItems(Menu menu) { 3997 clearAssistMenuItems(menu); 3998 if (!mTextView.isDeviceProvisioned()) { 3999 return; 4000 } 4001 final TextClassification textClassification = 4002 getSelectionActionModeHelper().getTextClassification(); 4003 if (textClassification == null) { 4004 return; 4005 } 4006 if (isValidAssistMenuItem( 4007 textClassification.getIcon(), 4008 textClassification.getLabel(), 4009 textClassification.getIntent())) { 4010 final MenuItem item = menu.add( 4011 TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, 4012 textClassification.getLabel()) 4013 .setIcon(textClassification.getIcon()) 4014 .setIntent(textClassification.getIntent()); 4015 item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 4016 mAssistClickHandlers.put( 4017 item, TextClassification.createStartActivityOnClickListener( 4018 mTextView.getContext(), textClassification.getIntent())); 4019 } 4020 final int count = textClassification.getSecondaryActionsCount(); 4021 for (int i = 0; i < count; i++) { 4022 if (!isValidAssistMenuItem( 4023 textClassification.getSecondaryIcon(i), 4024 textClassification.getSecondaryLabel(i), 4025 textClassification.getSecondaryIntent(i))) { 4026 continue; 4027 } 4028 final int order = MENU_ITEM_ORDER_SECONDARY_ASSIST_ACTIONS_START + i; 4029 final MenuItem item = menu.add( 4030 TextView.ID_ASSIST, Menu.NONE, order, 4031 textClassification.getSecondaryLabel(i)) 4032 .setIcon(textClassification.getSecondaryIcon(i)) 4033 .setIntent(textClassification.getSecondaryIntent(i)); 4034 item.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 4035 mAssistClickHandlers.put(item, 4036 TextClassification.createStartActivityOnClickListener( 4037 mTextView.getContext(), textClassification.getSecondaryIntent(i))); 4038 } 4039 } 4040 4041 private void clearAssistMenuItems(Menu menu) { 4042 int i = 0; 4043 while (i < menu.size()) { 4044 final MenuItem menuItem = menu.getItem(i); 4045 if (menuItem.getGroupId() == TextView.ID_ASSIST) { 4046 menu.removeItem(menuItem.getItemId()); 4047 continue; 4048 } 4049 i++; 4050 } 4051 } 4052 4053 private boolean isValidAssistMenuItem(Drawable icon, CharSequence label, Intent intent) { 4054 final boolean hasUi = icon != null || !TextUtils.isEmpty(label); 4055 final boolean hasAction = isSupportedIntent(intent); 4056 return hasUi && hasAction; 4057 } 4058 4059 private boolean isSupportedIntent(Intent intent) { 4060 if (intent == null) { 4061 return false; 4062 } 4063 final Context context = mTextView.getContext(); 4064 final ResolveInfo info = context.getPackageManager().resolveActivity(intent, 0); 4065 final boolean samePackage = context.getPackageName().equals( 4066 info.activityInfo.packageName); 4067 if (samePackage) { 4068 return true; 4069 } 4070 4071 final boolean exported = info.activityInfo.exported; 4072 final boolean requiresPermission = info.activityInfo.permission != null; 4073 final boolean hasPermission = !requiresPermission 4074 || context.checkSelfPermission(info.activityInfo.permission) 4075 == PackageManager.PERMISSION_GRANTED; 4076 return exported && hasPermission; 4077 } 4078 4079 private boolean onAssistMenuItemClicked(MenuItem assistMenuItem) { 4080 Preconditions.checkArgument(assistMenuItem.getGroupId() == TextView.ID_ASSIST); 4081 4082 final TextClassification textClassification = 4083 getSelectionActionModeHelper().getTextClassification(); 4084 if (!mTextView.isDeviceProvisioned() || textClassification == null) { 4085 // No textClassification result to handle the click. Eat the click. 4086 return true; 4087 } 4088 4089 OnClickListener onClickListener = mAssistClickHandlers.get(assistMenuItem); 4090 if (onClickListener == null) { 4091 final Intent intent = assistMenuItem.getIntent(); 4092 if (intent != null) { 4093 onClickListener = TextClassification.createStartActivityOnClickListener( 4094 mTextView.getContext(), intent); 4095 } 4096 } 4097 if (onClickListener != null) { 4098 onClickListener.onClick(mTextView); 4099 stopTextActionMode(); 4100 } 4101 // We tried our best. 4102 return true; 4103 } 4104 4105 @Override 4106 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 4107 getSelectionActionModeHelper().onSelectionAction(item.getItemId()); 4108 4109 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 4110 return true; 4111 } 4112 Callback customCallback = getCustomCallback(); 4113 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 4114 return true; 4115 } 4116 if (item.getGroupId() == TextView.ID_ASSIST && onAssistMenuItemClicked(item)) { 4117 return true; 4118 } 4119 return mTextView.onTextContextMenuItem(item.getItemId()); 4120 } 4121 4122 @Override 4123 public void onDestroyActionMode(ActionMode mode) { 4124 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 4125 getSelectionActionModeHelper().onDestroyActionMode(); 4126 mTextActionMode = null; 4127 Callback customCallback = getCustomCallback(); 4128 if (customCallback != null) { 4129 customCallback.onDestroyActionMode(mode); 4130 } 4131 4132 if (!mPreserveSelection) { 4133 /* 4134 * Leave current selection when we tentatively destroy action mode for the 4135 * selection. If we're detaching from a window, we'll bring back the selection 4136 * mode when (if) we get reattached. 4137 */ 4138 Selection.setSelection((Spannable) mTextView.getText(), 4139 mTextView.getSelectionEnd()); 4140 } 4141 4142 if (mSelectionModifierCursorController != null) { 4143 mSelectionModifierCursorController.hide(); 4144 } 4145 4146 mAssistClickHandlers.clear(); 4147 } 4148 4149 @Override 4150 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 4151 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 4152 super.onGetContentRect(mode, view, outRect); 4153 return; 4154 } 4155 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 4156 // We have a selection. 4157 mSelectionPath.reset(); 4158 mTextView.getLayout().getSelectionPath( 4159 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 4160 mSelectionPath.computeBounds(mSelectionBounds, true); 4161 mSelectionBounds.bottom += mHandleHeight; 4162 } else { 4163 // We have a cursor. 4164 Layout layout = mTextView.getLayout(); 4165 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 4166 float primaryHorizontal = clampHorizontalPosition(null, 4167 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 4168 mSelectionBounds.set( 4169 primaryHorizontal, 4170 layout.getLineTop(line), 4171 primaryHorizontal, 4172 layout.getLineBottom(line) - layout.getLineBottom(line) + mHandleHeight); 4173 } 4174 // Take TextView's padding and scroll into account. 4175 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4176 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4177 outRect.set( 4178 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4179 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4180 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4181 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4182 } 4183 } 4184 4185 /** 4186 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4187 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4188 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4189 */ 4190 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4191 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4192 final int[] mTmpIntOffset = new int[2]; 4193 final Matrix mViewToScreenMatrix = new Matrix(); 4194 4195 @Override 4196 public void updatePosition(int parentPositionX, int parentPositionY, 4197 boolean parentPositionChanged, boolean parentScrolled) { 4198 final InputMethodState ims = mInputMethodState; 4199 if (ims == null || ims.mBatchEditNesting > 0) { 4200 return; 4201 } 4202 final InputMethodManager imm = InputMethodManager.peekInstance(); 4203 if (null == imm) { 4204 return; 4205 } 4206 if (!imm.isActive(mTextView)) { 4207 return; 4208 } 4209 // Skip if the IME has not requested the cursor/anchor position. 4210 if (!imm.isCursorAnchorInfoEnabled()) { 4211 return; 4212 } 4213 Layout layout = mTextView.getLayout(); 4214 if (layout == null) { 4215 return; 4216 } 4217 4218 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4219 builder.reset(); 4220 4221 final int selectionStart = mTextView.getSelectionStart(); 4222 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4223 4224 // Construct transformation matrix from view local coordinates to screen coordinates. 4225 mViewToScreenMatrix.set(mTextView.getMatrix()); 4226 mTextView.getLocationOnScreen(mTmpIntOffset); 4227 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4228 builder.setMatrix(mViewToScreenMatrix); 4229 4230 final float viewportToContentHorizontalOffset = 4231 mTextView.viewportToContentHorizontalOffset(); 4232 final float viewportToContentVerticalOffset = 4233 mTextView.viewportToContentVerticalOffset(); 4234 4235 final CharSequence text = mTextView.getText(); 4236 if (text instanceof Spannable) { 4237 final Spannable sp = (Spannable) text; 4238 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4239 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4240 if (composingTextEnd < composingTextStart) { 4241 final int temp = composingTextEnd; 4242 composingTextEnd = composingTextStart; 4243 composingTextStart = temp; 4244 } 4245 final boolean hasComposingText = 4246 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4247 if (hasComposingText) { 4248 final CharSequence composingText = text.subSequence(composingTextStart, 4249 composingTextEnd); 4250 builder.setComposingText(composingTextStart, composingText); 4251 mTextView.populateCharacterBounds(builder, composingTextStart, 4252 composingTextEnd, viewportToContentHorizontalOffset, 4253 viewportToContentVerticalOffset); 4254 } 4255 } 4256 4257 // Treat selectionStart as the insertion point. 4258 if (0 <= selectionStart) { 4259 final int offset = selectionStart; 4260 final int line = layout.getLineForOffset(offset); 4261 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4262 + viewportToContentHorizontalOffset; 4263 final float insertionMarkerTop = layout.getLineTop(line) 4264 + viewportToContentVerticalOffset; 4265 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4266 + viewportToContentVerticalOffset; 4267 final float insertionMarkerBottom = layout.getLineBottomWithoutSpacing(line) 4268 + viewportToContentVerticalOffset; 4269 final boolean isTopVisible = mTextView 4270 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4271 final boolean isBottomVisible = mTextView 4272 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4273 int insertionMarkerFlags = 0; 4274 if (isTopVisible || isBottomVisible) { 4275 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4276 } 4277 if (!isTopVisible || !isBottomVisible) { 4278 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4279 } 4280 if (layout.isRtlCharAt(offset)) { 4281 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4282 } 4283 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4284 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4285 } 4286 4287 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4288 } 4289 } 4290 4291 @VisibleForTesting 4292 public abstract class HandleView extends View implements TextViewPositionListener { 4293 protected Drawable mDrawable; 4294 protected Drawable mDrawableLtr; 4295 protected Drawable mDrawableRtl; 4296 private final PopupWindow mContainer; 4297 // Position with respect to the parent TextView 4298 private int mPositionX, mPositionY; 4299 private boolean mIsDragging; 4300 // Offset from touch position to mPosition 4301 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4302 protected int mHotspotX; 4303 protected int mHorizontalGravity; 4304 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4305 private float mTouchOffsetY; 4306 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4307 private float mIdealVerticalOffset; 4308 // Parent's (TextView) previous position in window 4309 private int mLastParentX, mLastParentY; 4310 // Parent's (TextView) previous position on screen 4311 private int mLastParentXOnScreen, mLastParentYOnScreen; 4312 // Previous text character offset 4313 protected int mPreviousOffset = -1; 4314 // Previous text character offset 4315 private boolean mPositionHasChanged = true; 4316 // Minimum touch target size for handles 4317 private int mMinSize; 4318 // Indicates the line of text that the handle is on. 4319 protected int mPrevLine = UNSET_LINE; 4320 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4321 // when selecting text when the handles jump to the end / start of words which may be on 4322 // a different line. 4323 protected int mPreviousLineTouched = UNSET_LINE; 4324 4325 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4326 super(mTextView.getContext()); 4327 setId(id); 4328 mContainer = new PopupWindow(mTextView.getContext(), null, 4329 com.android.internal.R.attr.textSelectHandleWindowStyle); 4330 mContainer.setSplitTouchEnabled(true); 4331 mContainer.setClippingEnabled(false); 4332 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4333 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4334 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4335 mContainer.setContentView(this); 4336 4337 mDrawableLtr = drawableLtr; 4338 mDrawableRtl = drawableRtl; 4339 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4340 com.android.internal.R.dimen.text_handle_min_size); 4341 4342 updateDrawable(); 4343 4344 final int handleHeight = getPreferredHeight(); 4345 mTouchOffsetY = -0.3f * handleHeight; 4346 mIdealVerticalOffset = 0.7f * handleHeight; 4347 } 4348 4349 public float getIdealVerticalOffset() { 4350 return mIdealVerticalOffset; 4351 } 4352 4353 protected void updateDrawable() { 4354 if (mIsDragging) { 4355 // Don't update drawable during dragging. 4356 return; 4357 } 4358 final Layout layout = mTextView.getLayout(); 4359 if (layout == null) { 4360 return; 4361 } 4362 final int offset = getCurrentCursorOffset(); 4363 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4364 final Drawable oldDrawable = mDrawable; 4365 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4366 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4367 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4368 if (oldDrawable != mDrawable && isShowing()) { 4369 // Update popup window position. 4370 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4371 - getHorizontalOffset() + getCursorOffset(); 4372 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4373 mPositionHasChanged = true; 4374 updatePosition(mLastParentX, mLastParentY, false, false); 4375 postInvalidate(); 4376 } 4377 } 4378 4379 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4380 protected abstract int getHorizontalGravity(boolean isRtlRun); 4381 4382 // Touch-up filter: number of previous positions remembered 4383 private static final int HISTORY_SIZE = 5; 4384 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4385 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4386 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4387 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4388 private int mPreviousOffsetIndex = 0; 4389 private int mNumberPreviousOffsets = 0; 4390 4391 private void startTouchUpFilter(int offset) { 4392 mNumberPreviousOffsets = 0; 4393 addPositionToTouchUpFilter(offset); 4394 } 4395 4396 private void addPositionToTouchUpFilter(int offset) { 4397 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4398 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4399 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4400 mNumberPreviousOffsets++; 4401 } 4402 4403 private void filterOnTouchUp(boolean fromTouchScreen) { 4404 final long now = SystemClock.uptimeMillis(); 4405 int i = 0; 4406 int index = mPreviousOffsetIndex; 4407 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4408 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4409 i++; 4410 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4411 } 4412 4413 if (i > 0 && i < iMax 4414 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4415 positionAtCursorOffset(mPreviousOffsets[index], false, fromTouchScreen); 4416 } 4417 } 4418 4419 public boolean offsetHasBeenChanged() { 4420 return mNumberPreviousOffsets > 1; 4421 } 4422 4423 @Override 4424 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4425 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4426 } 4427 4428 @Override 4429 public void invalidate() { 4430 super.invalidate(); 4431 if (isShowing()) { 4432 positionAtCursorOffset(getCurrentCursorOffset(), true, false); 4433 } 4434 }; 4435 4436 private int getPreferredWidth() { 4437 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4438 } 4439 4440 private int getPreferredHeight() { 4441 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4442 } 4443 4444 public void show() { 4445 if (isShowing()) return; 4446 4447 getPositionListener().addSubscriber(this, true /* local position may change */); 4448 4449 // Make sure the offset is always considered new, even when focusing at same position 4450 mPreviousOffset = -1; 4451 positionAtCursorOffset(getCurrentCursorOffset(), false, false); 4452 } 4453 4454 protected void dismiss() { 4455 mIsDragging = false; 4456 mContainer.dismiss(); 4457 onDetached(); 4458 } 4459 4460 public void hide() { 4461 dismiss(); 4462 4463 getPositionListener().removeSubscriber(this); 4464 } 4465 4466 public boolean isShowing() { 4467 return mContainer.isShowing(); 4468 } 4469 4470 private boolean isVisible() { 4471 // Always show a dragging handle. 4472 if (mIsDragging) { 4473 return true; 4474 } 4475 4476 if (mTextView.isInBatchEditMode()) { 4477 return false; 4478 } 4479 4480 return mTextView.isPositionVisible( 4481 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4482 } 4483 4484 public abstract int getCurrentCursorOffset(); 4485 4486 protected abstract void updateSelection(int offset); 4487 4488 protected abstract void updatePosition(float x, float y, boolean fromTouchScreen); 4489 4490 @MagnifierHandleTrigger 4491 protected abstract int getMagnifierHandleTrigger(); 4492 4493 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4494 return layout.isRtlCharAt(offset); 4495 } 4496 4497 @VisibleForTesting 4498 public float getHorizontal(@NonNull Layout layout, int offset) { 4499 return layout.getPrimaryHorizontal(offset); 4500 } 4501 4502 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4503 return mTextView.getOffsetAtCoordinate(line, x); 4504 } 4505 4506 /** 4507 * @param offset Cursor offset. Must be in [-1, length]. 4508 * @param forceUpdatePosition whether to force update the position. This should be true 4509 * when If the parent has been scrolled, for example. 4510 * @param fromTouchScreen {@code true} if the cursor is moved with motion events from the 4511 * touch screen. 4512 */ 4513 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4514 boolean fromTouchScreen) { 4515 // A HandleView relies on the layout, which may be nulled by external methods 4516 Layout layout = mTextView.getLayout(); 4517 if (layout == null) { 4518 // Will update controllers' state, hiding them and stopping selection mode if needed 4519 prepareCursorControllers(); 4520 return; 4521 } 4522 layout = mTextView.getLayout(); 4523 4524 boolean offsetChanged = offset != mPreviousOffset; 4525 if (offsetChanged || forceUpdatePosition) { 4526 if (offsetChanged) { 4527 updateSelection(offset); 4528 if (fromTouchScreen && mHapticTextHandleEnabled) { 4529 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 4530 } 4531 addPositionToTouchUpFilter(offset); 4532 } 4533 final int line = layout.getLineForOffset(offset); 4534 mPrevLine = line; 4535 4536 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4537 - getHorizontalOffset() + getCursorOffset(); 4538 mPositionY = layout.getLineBottomWithoutSpacing(line); 4539 4540 // Take TextView's padding and scroll into account. 4541 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4542 mPositionY += mTextView.viewportToContentVerticalOffset(); 4543 4544 mPreviousOffset = offset; 4545 mPositionHasChanged = true; 4546 } 4547 } 4548 4549 /** 4550 * Return the clamped horizontal position for the cursor. 4551 * 4552 * @param layout Text layout. 4553 * @param offset Character offset for the cursor. 4554 * @return The clamped horizontal position for the cursor. 4555 */ 4556 int getCursorHorizontalPosition(Layout layout, int offset) { 4557 return (int) (getHorizontal(layout, offset) - 0.5f); 4558 } 4559 4560 @Override 4561 public void updatePosition(int parentPositionX, int parentPositionY, 4562 boolean parentPositionChanged, boolean parentScrolled) { 4563 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled, false); 4564 if (parentPositionChanged || mPositionHasChanged) { 4565 if (mIsDragging) { 4566 // Update touchToWindow offset in case of parent scrolling while dragging 4567 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4568 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4569 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4570 mLastParentX = parentPositionX; 4571 mLastParentY = parentPositionY; 4572 } 4573 4574 onHandleMoved(); 4575 } 4576 4577 if (isVisible()) { 4578 // Transform to the window coordinates to follow the view tranformation. 4579 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4580 mTextView.transformFromViewToWindowSpace(pts); 4581 pts[0] -= mHotspotX + getHorizontalOffset(); 4582 4583 if (isShowing()) { 4584 mContainer.update(pts[0], pts[1], -1, -1); 4585 } else { 4586 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4587 } 4588 } else { 4589 if (isShowing()) { 4590 dismiss(); 4591 } 4592 } 4593 4594 mPositionHasChanged = false; 4595 } 4596 } 4597 4598 @Override 4599 protected void onDraw(Canvas c) { 4600 final int drawWidth = mDrawable.getIntrinsicWidth(); 4601 final int left = getHorizontalOffset(); 4602 4603 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4604 mDrawable.draw(c); 4605 } 4606 4607 private int getHorizontalOffset() { 4608 final int width = getPreferredWidth(); 4609 final int drawWidth = mDrawable.getIntrinsicWidth(); 4610 final int left; 4611 switch (mHorizontalGravity) { 4612 case Gravity.LEFT: 4613 left = 0; 4614 break; 4615 default: 4616 case Gravity.CENTER: 4617 left = (width - drawWidth) / 2; 4618 break; 4619 case Gravity.RIGHT: 4620 left = width - drawWidth; 4621 break; 4622 } 4623 return left; 4624 } 4625 4626 protected int getCursorOffset() { 4627 return 0; 4628 } 4629 4630 protected final void showMagnifier() { 4631 if (mMagnifier == null) { 4632 return; 4633 } 4634 4635 final int trigger = getMagnifierHandleTrigger(); 4636 final int offset; 4637 switch (trigger) { 4638 case MagnifierHandleTrigger.INSERTION: // Fall through. 4639 case MagnifierHandleTrigger.SELECTION_START: 4640 offset = mTextView.getSelectionStart(); 4641 break; 4642 case MagnifierHandleTrigger.SELECTION_END: 4643 offset = mTextView.getSelectionEnd(); 4644 break; 4645 default: 4646 offset = -1; 4647 break; 4648 } 4649 4650 if (offset == -1) { 4651 dismissMagnifier(); 4652 } 4653 4654 final Layout layout = mTextView.getLayout(); 4655 final int lineNumber = layout.getLineForOffset(offset); 4656 // Horizontally snap to character offset. 4657 final float xPosInView = getHorizontal(mTextView.getLayout(), offset) 4658 + mTextView.getTotalPaddingLeft() - mTextView.getScrollX(); 4659 // Vertically snap to middle of current line. 4660 final float yPosInView = (mTextView.getLayout().getLineTop(lineNumber) 4661 + mTextView.getLayout().getLineBottom(lineNumber)) / 2.0f 4662 + mTextView.getTotalPaddingTop() - mTextView.getScrollY(); 4663 4664 suspendBlink(); 4665 mMagnifier.show(xPosInView, yPosInView); 4666 } 4667 4668 protected final void dismissMagnifier() { 4669 if (mMagnifier != null) { 4670 mMagnifier.dismiss(); 4671 resumeBlink(); 4672 } 4673 } 4674 4675 @Override 4676 public boolean onTouchEvent(MotionEvent ev) { 4677 updateFloatingToolbarVisibility(ev); 4678 4679 switch (ev.getActionMasked()) { 4680 case MotionEvent.ACTION_DOWN: { 4681 startTouchUpFilter(getCurrentCursorOffset()); 4682 4683 final PositionListener positionListener = getPositionListener(); 4684 mLastParentX = positionListener.getPositionX(); 4685 mLastParentY = positionListener.getPositionY(); 4686 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4687 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4688 4689 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4690 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4691 mTouchToWindowOffsetX = xInWindow - mPositionX; 4692 mTouchToWindowOffsetY = yInWindow - mPositionY; 4693 4694 mIsDragging = true; 4695 mPreviousLineTouched = UNSET_LINE; 4696 break; 4697 } 4698 4699 case MotionEvent.ACTION_MOVE: { 4700 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4701 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4702 4703 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4704 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4705 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4706 float newVerticalOffset; 4707 if (previousVerticalOffset < mIdealVerticalOffset) { 4708 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4709 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4710 } else { 4711 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4712 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4713 } 4714 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4715 4716 final float newPosX = 4717 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4718 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4719 4720 updatePosition(newPosX, newPosY, 4721 ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4722 break; 4723 } 4724 4725 case MotionEvent.ACTION_UP: 4726 filterOnTouchUp(ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4727 // Fall through. 4728 case MotionEvent.ACTION_CANCEL: 4729 mIsDragging = false; 4730 updateDrawable(); 4731 break; 4732 } 4733 return true; 4734 } 4735 4736 public boolean isDragging() { 4737 return mIsDragging; 4738 } 4739 4740 void onHandleMoved() {} 4741 4742 public void onDetached() {} 4743 } 4744 4745 private class InsertionHandleView extends HandleView { 4746 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4747 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4748 4749 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4750 private float mDownPositionX, mDownPositionY; 4751 private Runnable mHider; 4752 4753 public InsertionHandleView(Drawable drawable) { 4754 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4755 } 4756 4757 @Override 4758 public void show() { 4759 super.show(); 4760 4761 final long durationSinceCutOrCopy = 4762 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4763 4764 // Cancel the single tap delayed runnable. 4765 if (mInsertionActionModeRunnable != null 4766 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4767 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4768 || isCursorInsideEasyCorrectionSpan())) { 4769 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4770 } 4771 4772 // Prepare and schedule the single tap runnable to run exactly after the double tap 4773 // timeout has passed. 4774 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4775 && !isCursorInsideEasyCorrectionSpan() 4776 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4777 if (mTextActionMode == null) { 4778 if (mInsertionActionModeRunnable == null) { 4779 mInsertionActionModeRunnable = new Runnable() { 4780 @Override 4781 public void run() { 4782 startInsertionActionMode(); 4783 } 4784 }; 4785 } 4786 mTextView.postDelayed( 4787 mInsertionActionModeRunnable, 4788 ViewConfiguration.getDoubleTapTimeout() + 1); 4789 } 4790 4791 } 4792 4793 hideAfterDelay(); 4794 } 4795 4796 private void hideAfterDelay() { 4797 if (mHider == null) { 4798 mHider = new Runnable() { 4799 public void run() { 4800 hide(); 4801 } 4802 }; 4803 } else { 4804 removeHiderCallback(); 4805 } 4806 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4807 } 4808 4809 private void removeHiderCallback() { 4810 if (mHider != null) { 4811 mTextView.removeCallbacks(mHider); 4812 } 4813 } 4814 4815 @Override 4816 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4817 return drawable.getIntrinsicWidth() / 2; 4818 } 4819 4820 @Override 4821 protected int getHorizontalGravity(boolean isRtlRun) { 4822 return Gravity.CENTER_HORIZONTAL; 4823 } 4824 4825 @Override 4826 protected int getCursorOffset() { 4827 int offset = super.getCursorOffset(); 4828 if (mDrawableForCursor != null) { 4829 mDrawableForCursor.getPadding(mTempRect); 4830 offset += (mDrawableForCursor.getIntrinsicWidth() 4831 - mTempRect.left - mTempRect.right) / 2; 4832 } 4833 return offset; 4834 } 4835 4836 @Override 4837 int getCursorHorizontalPosition(Layout layout, int offset) { 4838 if (mDrawableForCursor != null) { 4839 final float horizontal = getHorizontal(layout, offset); 4840 return clampHorizontalPosition(mDrawableForCursor, horizontal) + mTempRect.left; 4841 } 4842 return super.getCursorHorizontalPosition(layout, offset); 4843 } 4844 4845 @Override 4846 public boolean onTouchEvent(MotionEvent ev) { 4847 final boolean result = super.onTouchEvent(ev); 4848 4849 switch (ev.getActionMasked()) { 4850 case MotionEvent.ACTION_DOWN: 4851 mDownPositionX = ev.getRawX(); 4852 mDownPositionY = ev.getRawY(); 4853 showMagnifier(); 4854 break; 4855 4856 case MotionEvent.ACTION_MOVE: 4857 showMagnifier(); 4858 break; 4859 4860 case MotionEvent.ACTION_UP: 4861 if (!offsetHasBeenChanged()) { 4862 final float deltaX = mDownPositionX - ev.getRawX(); 4863 final float deltaY = mDownPositionY - ev.getRawY(); 4864 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4865 4866 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4867 mTextView.getContext()); 4868 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4869 4870 if (distanceSquared < touchSlop * touchSlop) { 4871 // Tapping on the handle toggles the insertion action mode. 4872 if (mTextActionMode != null) { 4873 stopTextActionMode(); 4874 } else { 4875 startInsertionActionMode(); 4876 } 4877 } 4878 } else { 4879 if (mTextActionMode != null) { 4880 mTextActionMode.invalidateContentRect(); 4881 } 4882 } 4883 // Fall through. 4884 case MotionEvent.ACTION_CANCEL: 4885 hideAfterDelay(); 4886 dismissMagnifier(); 4887 break; 4888 4889 default: 4890 break; 4891 } 4892 4893 return result; 4894 } 4895 4896 @Override 4897 public int getCurrentCursorOffset() { 4898 return mTextView.getSelectionStart(); 4899 } 4900 4901 @Override 4902 public void updateSelection(int offset) { 4903 Selection.setSelection((Spannable) mTextView.getText(), offset); 4904 } 4905 4906 @Override 4907 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 4908 Layout layout = mTextView.getLayout(); 4909 int offset; 4910 if (layout != null) { 4911 if (mPreviousLineTouched == UNSET_LINE) { 4912 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4913 } 4914 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4915 offset = getOffsetAtCoordinate(layout, currLine, x); 4916 mPreviousLineTouched = currLine; 4917 } else { 4918 offset = -1; 4919 } 4920 positionAtCursorOffset(offset, false, fromTouchScreen); 4921 if (mTextActionMode != null) { 4922 invalidateActionMode(); 4923 } 4924 } 4925 4926 @Override 4927 void onHandleMoved() { 4928 super.onHandleMoved(); 4929 removeHiderCallback(); 4930 } 4931 4932 @Override 4933 public void onDetached() { 4934 super.onDetached(); 4935 removeHiderCallback(); 4936 } 4937 4938 @Override 4939 @MagnifierHandleTrigger 4940 protected int getMagnifierHandleTrigger() { 4941 return MagnifierHandleTrigger.INSERTION; 4942 } 4943 } 4944 4945 @Retention(RetentionPolicy.SOURCE) 4946 @IntDef(prefix = { "HANDLE_TYPE_" }, value = { 4947 HANDLE_TYPE_SELECTION_START, 4948 HANDLE_TYPE_SELECTION_END 4949 }) 4950 public @interface HandleType {} 4951 public static final int HANDLE_TYPE_SELECTION_START = 0; 4952 public static final int HANDLE_TYPE_SELECTION_END = 1; 4953 4954 /** For selection handles */ 4955 @VisibleForTesting 4956 public final class SelectionHandleView extends HandleView { 4957 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4958 // end (HANDLE_TYPE_SELECTION_END). 4959 @HandleType 4960 private final int mHandleType; 4961 // Indicates whether the cursor is making adjustments within a word. 4962 private boolean mInWord = false; 4963 // Difference between touch position and word boundary position. 4964 private float mTouchWordDelta; 4965 // X value of the previous updatePosition call. 4966 private float mPrevX; 4967 // Indicates if the handle has moved a boundary between LTR and RTL text. 4968 private boolean mLanguageDirectionChanged = false; 4969 // Distance from edge of horizontally scrolling text view 4970 // to use to switch to character mode. 4971 private final float mTextViewEdgeSlop; 4972 // Used to save text view location. 4973 private final int[] mTextViewLocation = new int[2]; 4974 4975 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4976 @HandleType int handleType) { 4977 super(drawableLtr, drawableRtl, id); 4978 mHandleType = handleType; 4979 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4980 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4981 } 4982 4983 private boolean isStartHandle() { 4984 return mHandleType == HANDLE_TYPE_SELECTION_START; 4985 } 4986 4987 @Override 4988 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4989 if (isRtlRun == isStartHandle()) { 4990 return drawable.getIntrinsicWidth() / 4; 4991 } else { 4992 return (drawable.getIntrinsicWidth() * 3) / 4; 4993 } 4994 } 4995 4996 @Override 4997 protected int getHorizontalGravity(boolean isRtlRun) { 4998 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4999 } 5000 5001 @Override 5002 public int getCurrentCursorOffset() { 5003 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 5004 } 5005 5006 @Override 5007 protected void updateSelection(int offset) { 5008 if (isStartHandle()) { 5009 Selection.setSelection((Spannable) mTextView.getText(), offset, 5010 mTextView.getSelectionEnd()); 5011 } else { 5012 Selection.setSelection((Spannable) mTextView.getText(), 5013 mTextView.getSelectionStart(), offset); 5014 } 5015 updateDrawable(); 5016 if (mTextActionMode != null) { 5017 invalidateActionMode(); 5018 } 5019 } 5020 5021 @Override 5022 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 5023 final Layout layout = mTextView.getLayout(); 5024 if (layout == null) { 5025 // HandleView will deal appropriately in positionAtCursorOffset when 5026 // layout is null. 5027 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y), 5028 fromTouchScreen); 5029 return; 5030 } 5031 5032 if (mPreviousLineTouched == UNSET_LINE) { 5033 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 5034 } 5035 5036 boolean positionCursor = false; 5037 final int anotherHandleOffset = 5038 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5039 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 5040 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 5041 5042 if (isStartHandle() && initialOffset >= anotherHandleOffset 5043 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 5044 // Handles have crossed, bound it to the first selected line and 5045 // adjust by word / char as normal. 5046 currLine = layout.getLineForOffset(anotherHandleOffset); 5047 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 5048 } 5049 5050 int offset = initialOffset; 5051 final int wordEnd = getWordEnd(offset); 5052 final int wordStart = getWordStart(offset); 5053 5054 if (mPrevX == UNSET_X_VALUE) { 5055 mPrevX = x; 5056 } 5057 5058 final int currentOffset = getCurrentCursorOffset(); 5059 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 5060 final boolean atRtl = isAtRtlRun(layout, offset); 5061 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 5062 5063 // We can't determine if the user is expanding or shrinking the selection if they're 5064 // on a bi-di boundary, so until they've moved past the boundary we'll just place 5065 // the cursor at the current position. 5066 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 5067 // We're on a boundary or this is the first direction change -- just update 5068 // to the current position. 5069 mLanguageDirectionChanged = true; 5070 mTouchWordDelta = 0.0f; 5071 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5072 return; 5073 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 5074 // We've just moved past the boundary so update the position. After this we can 5075 // figure out if the user is expanding or shrinking to go by word or character. 5076 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5077 mTouchWordDelta = 0.0f; 5078 mLanguageDirectionChanged = false; 5079 return; 5080 } 5081 5082 boolean isExpanding; 5083 final float xDiff = x - mPrevX; 5084 if (isStartHandle()) { 5085 isExpanding = currLine < mPreviousLineTouched; 5086 } else { 5087 isExpanding = currLine > mPreviousLineTouched; 5088 } 5089 if (atRtl == isStartHandle()) { 5090 isExpanding |= xDiff > 0; 5091 } else { 5092 isExpanding |= xDiff < 0; 5093 } 5094 5095 if (mTextView.getHorizontallyScrolling()) { 5096 if (positionNearEdgeOfScrollingView(x, atRtl) 5097 && ((isStartHandle() && mTextView.getScrollX() != 0) 5098 || (!isStartHandle() 5099 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 5100 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 5101 || (!isStartHandle() && offset > currentOffset))) 5102 || !isExpanding)) { 5103 // If we're expanding ensure that the offset is actually expanding compared to 5104 // the current offset, if the handle snapped to the word, the finger position 5105 // may be out of sync and we don't want the selection to jump back. 5106 mTouchWordDelta = 0.0f; 5107 final int nextOffset = (atRtl == isStartHandle()) 5108 ? layout.getOffsetToRightOf(mPreviousOffset) 5109 : layout.getOffsetToLeftOf(mPreviousOffset); 5110 positionAndAdjustForCrossingHandles(nextOffset, fromTouchScreen); 5111 return; 5112 } 5113 } 5114 5115 if (isExpanding) { 5116 // User is increasing the selection. 5117 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 5118 final boolean snapToWord = (!mInWord 5119 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 5120 && atRtl == isAtRtlRun(layout, wordBoundary); 5121 if (snapToWord) { 5122 // Sometimes words can be broken across lines (Chinese, hyphenation). 5123 // We still snap to the word boundary but we only use the letters on the 5124 // current line to determine if the user is far enough into the word to snap. 5125 if (layout.getLineForOffset(wordBoundary) != currLine) { 5126 wordBoundary = isStartHandle() 5127 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 5128 } 5129 final int offsetThresholdToSnap = isStartHandle() 5130 ? wordEnd - ((wordEnd - wordBoundary) / 2) 5131 : wordStart + ((wordBoundary - wordStart) / 2); 5132 if (isStartHandle() 5133 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 5134 // User is far enough into the word or on a different line so we expand by 5135 // word. 5136 offset = wordStart; 5137 } else if (!isStartHandle() 5138 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 5139 // User is far enough into the word or on a different line so we expand by 5140 // word. 5141 offset = wordEnd; 5142 } else { 5143 offset = mPreviousOffset; 5144 } 5145 } 5146 if ((isStartHandle() && offset < initialOffset) 5147 || (!isStartHandle() && offset > initialOffset)) { 5148 final float adjustedX = getHorizontal(layout, offset); 5149 mTouchWordDelta = 5150 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 5151 } else { 5152 mTouchWordDelta = 0.0f; 5153 } 5154 positionCursor = true; 5155 } else { 5156 final int adjustedOffset = 5157 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 5158 final boolean shrinking = isStartHandle() 5159 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 5160 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 5161 if (shrinking) { 5162 // User is shrinking the selection. 5163 if (currLine != mPrevLine) { 5164 // We're on a different line, so we'll snap to word boundaries. 5165 offset = isStartHandle() ? wordStart : wordEnd; 5166 if ((isStartHandle() && offset < initialOffset) 5167 || (!isStartHandle() && offset > initialOffset)) { 5168 final float adjustedX = getHorizontal(layout, offset); 5169 mTouchWordDelta = 5170 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 5171 } else { 5172 mTouchWordDelta = 0.0f; 5173 } 5174 } else { 5175 offset = adjustedOffset; 5176 } 5177 positionCursor = true; 5178 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 5179 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 5180 // Handle has jumped to the word boundary, and the user is moving 5181 // their finger towards the handle, the delta should be updated. 5182 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 5183 - getHorizontal(layout, mPreviousOffset); 5184 } 5185 } 5186 5187 if (positionCursor) { 5188 mPreviousLineTouched = currLine; 5189 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5190 } 5191 mPrevX = x; 5192 } 5193 5194 @Override 5195 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 5196 boolean fromTouchScreen) { 5197 super.positionAtCursorOffset(offset, forceUpdatePosition, fromTouchScreen); 5198 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 5199 } 5200 5201 @Override 5202 public boolean onTouchEvent(MotionEvent event) { 5203 boolean superResult = super.onTouchEvent(event); 5204 5205 switch (event.getActionMasked()) { 5206 case MotionEvent.ACTION_DOWN: 5207 // Reset the touch word offset and x value when the user 5208 // re-engages the handle. 5209 mTouchWordDelta = 0.0f; 5210 mPrevX = UNSET_X_VALUE; 5211 showMagnifier(); 5212 break; 5213 5214 case MotionEvent.ACTION_MOVE: 5215 showMagnifier(); 5216 break; 5217 5218 case MotionEvent.ACTION_UP: 5219 case MotionEvent.ACTION_CANCEL: 5220 dismissMagnifier(); 5221 break; 5222 } 5223 5224 return superResult; 5225 } 5226 5227 private void positionAndAdjustForCrossingHandles(int offset, boolean fromTouchScreen) { 5228 final int anotherHandleOffset = 5229 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5230 if ((isStartHandle() && offset >= anotherHandleOffset) 5231 || (!isStartHandle() && offset <= anotherHandleOffset)) { 5232 mTouchWordDelta = 0.0f; 5233 final Layout layout = mTextView.getLayout(); 5234 if (layout != null && offset != anotherHandleOffset) { 5235 final float horiz = getHorizontal(layout, offset); 5236 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 5237 !isStartHandle()); 5238 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 5239 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 5240 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 5241 // This handle passes another one as it crossed a direction boundary. 5242 // Don't minimize the selection, but keep the handle at the run boundary. 5243 final int currentOffset = getCurrentCursorOffset(); 5244 final int offsetToGetRunRange = isStartHandle() 5245 ? currentOffset : Math.max(currentOffset - 1, 0); 5246 final long range = layout.getRunRange(offsetToGetRunRange); 5247 if (isStartHandle()) { 5248 offset = TextUtils.unpackRangeStartFromLong(range); 5249 } else { 5250 offset = TextUtils.unpackRangeEndFromLong(range); 5251 } 5252 positionAtCursorOffset(offset, false, fromTouchScreen); 5253 return; 5254 } 5255 } 5256 // Handles can not cross and selection is at least one character. 5257 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5258 } 5259 positionAtCursorOffset(offset, false, fromTouchScreen); 5260 } 5261 5262 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5263 mTextView.getLocationOnScreen(mTextViewLocation); 5264 boolean nearEdge; 5265 if (atRtl == isStartHandle()) { 5266 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5267 - mTextView.getPaddingRight(); 5268 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5269 } else { 5270 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5271 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5272 } 5273 return nearEdge; 5274 } 5275 5276 @Override 5277 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5278 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5279 return layout.isRtlCharAt(offsetToCheck); 5280 } 5281 5282 @Override 5283 public float getHorizontal(@NonNull Layout layout, int offset) { 5284 return getHorizontal(layout, offset, isStartHandle()); 5285 } 5286 5287 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5288 final int line = layout.getLineForOffset(offset); 5289 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5290 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5291 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5292 return (isRtlChar == isRtlParagraph) 5293 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5294 } 5295 5296 @Override 5297 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5298 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5299 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5300 if (!layout.isLevelBoundary(primaryOffset)) { 5301 return primaryOffset; 5302 } 5303 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5304 final int currentOffset = getCurrentCursorOffset(); 5305 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5306 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5307 if (primaryDiff < secondaryDiff) { 5308 return primaryOffset; 5309 } else if (primaryDiff > secondaryDiff) { 5310 return secondaryOffset; 5311 } else { 5312 final int offsetToCheck = isStartHandle() 5313 ? currentOffset : Math.max(currentOffset - 1, 0); 5314 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5315 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5316 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5317 } 5318 } 5319 5320 @MagnifierHandleTrigger 5321 protected int getMagnifierHandleTrigger() { 5322 return isStartHandle() 5323 ? MagnifierHandleTrigger.SELECTION_START 5324 : MagnifierHandleTrigger.SELECTION_END; 5325 } 5326 } 5327 5328 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5329 final int trueLine = mTextView.getLineAtCoordinate(y); 5330 if (layout == null || prevLine > layout.getLineCount() 5331 || layout.getLineCount() <= 0 || prevLine < 0) { 5332 // Invalid parameters, just return whatever line is at y. 5333 return trueLine; 5334 } 5335 5336 if (Math.abs(trueLine - prevLine) >= 2) { 5337 // Only stick to lines if we're within a line of the previous selection. 5338 return trueLine; 5339 } 5340 5341 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5342 final int lineCount = layout.getLineCount(); 5343 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5344 5345 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5346 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5347 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5348 5349 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5350 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5351 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5352 5353 // Determine if we've moved lines based on y position and previous line. 5354 int currLine; 5355 if (y <= yTopBound) { 5356 currLine = Math.max(prevLine - 1, 0); 5357 } else if (y >= yBottomBound) { 5358 currLine = Math.min(prevLine + 1, lineCount - 1); 5359 } else { 5360 currLine = prevLine; 5361 } 5362 return currLine; 5363 } 5364 5365 /** 5366 * A CursorController instance can be used to control a cursor in the text. 5367 */ 5368 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5369 /** 5370 * Makes the cursor controller visible on screen. 5371 * See also {@link #hide()}. 5372 */ 5373 public void show(); 5374 5375 /** 5376 * Hide the cursor controller from screen. 5377 * See also {@link #show()}. 5378 */ 5379 public void hide(); 5380 5381 /** 5382 * Called when the view is detached from window. Perform house keeping task, such as 5383 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5384 * preventing the activity from being recycled. 5385 */ 5386 public void onDetached(); 5387 5388 public boolean isCursorBeingModified(); 5389 5390 public boolean isActive(); 5391 } 5392 5393 private class InsertionPointCursorController implements CursorController { 5394 private InsertionHandleView mHandle; 5395 5396 public void show() { 5397 getHandle().show(); 5398 5399 if (mSelectionModifierCursorController != null) { 5400 mSelectionModifierCursorController.hide(); 5401 } 5402 } 5403 5404 public void hide() { 5405 if (mHandle != null) { 5406 mHandle.hide(); 5407 } 5408 } 5409 5410 public void onTouchModeChanged(boolean isInTouchMode) { 5411 if (!isInTouchMode) { 5412 hide(); 5413 } 5414 } 5415 5416 private InsertionHandleView getHandle() { 5417 if (mSelectHandleCenter == null) { 5418 mSelectHandleCenter = mTextView.getContext().getDrawable( 5419 mTextView.mTextSelectHandleRes); 5420 } 5421 if (mHandle == null) { 5422 mHandle = new InsertionHandleView(mSelectHandleCenter); 5423 } 5424 return mHandle; 5425 } 5426 5427 @Override 5428 public void onDetached() { 5429 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5430 observer.removeOnTouchModeChangeListener(this); 5431 5432 if (mHandle != null) mHandle.onDetached(); 5433 } 5434 5435 @Override 5436 public boolean isCursorBeingModified() { 5437 return mHandle != null && mHandle.isDragging(); 5438 } 5439 5440 @Override 5441 public boolean isActive() { 5442 return mHandle != null && mHandle.isShowing(); 5443 } 5444 5445 public void invalidateHandle() { 5446 if (mHandle != null) { 5447 mHandle.invalidate(); 5448 } 5449 } 5450 } 5451 5452 class SelectionModifierCursorController implements CursorController { 5453 // The cursor controller handles, lazily created when shown. 5454 private SelectionHandleView mStartHandle; 5455 private SelectionHandleView mEndHandle; 5456 // The offsets of that last touch down event. Remembered to start selection there. 5457 private int mMinTouchOffset, mMaxTouchOffset; 5458 5459 private float mDownPositionX, mDownPositionY; 5460 private boolean mGestureStayedInTapRegion; 5461 5462 // Where the user first starts the drag motion. 5463 private int mStartOffset = -1; 5464 5465 private boolean mHaventMovedEnoughToStartDrag; 5466 // The line that a selection happened most recently with the drag accelerator. 5467 private int mLineSelectionIsOn = -1; 5468 // Whether the drag accelerator has selected past the initial line. 5469 private boolean mSwitchedLines = false; 5470 5471 // Indicates the drag accelerator mode that the user is currently using. 5472 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5473 // Drag accelerator is inactive. 5474 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5475 // Character based selection by dragging. Only for mouse. 5476 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5477 // Word based selection by dragging. Enabled after long pressing or double tapping. 5478 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5479 // Paragraph based selection by dragging. Enabled after mouse triple click. 5480 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5481 5482 SelectionModifierCursorController() { 5483 resetTouchOffsets(); 5484 } 5485 5486 public void show() { 5487 if (mTextView.isInBatchEditMode()) { 5488 return; 5489 } 5490 initDrawables(); 5491 initHandles(); 5492 } 5493 5494 private void initDrawables() { 5495 if (mSelectHandleLeft == null) { 5496 mSelectHandleLeft = mTextView.getContext().getDrawable( 5497 mTextView.mTextSelectHandleLeftRes); 5498 } 5499 if (mSelectHandleRight == null) { 5500 mSelectHandleRight = mTextView.getContext().getDrawable( 5501 mTextView.mTextSelectHandleRightRes); 5502 } 5503 } 5504 5505 private void initHandles() { 5506 // Lazy object creation has to be done before updatePosition() is called. 5507 if (mStartHandle == null) { 5508 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5509 com.android.internal.R.id.selection_start_handle, 5510 HANDLE_TYPE_SELECTION_START); 5511 } 5512 if (mEndHandle == null) { 5513 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5514 com.android.internal.R.id.selection_end_handle, 5515 HANDLE_TYPE_SELECTION_END); 5516 } 5517 5518 mStartHandle.show(); 5519 mEndHandle.show(); 5520 5521 hideInsertionPointCursorController(); 5522 } 5523 5524 public void hide() { 5525 if (mStartHandle != null) mStartHandle.hide(); 5526 if (mEndHandle != null) mEndHandle.hide(); 5527 } 5528 5529 public void enterDrag(int dragAcceleratorMode) { 5530 // Just need to init the handles / hide insertion cursor. 5531 show(); 5532 mDragAcceleratorMode = dragAcceleratorMode; 5533 // Start location of selection. 5534 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5535 mLastDownPositionY); 5536 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5537 // Don't show the handles until user has lifted finger. 5538 hide(); 5539 5540 // This stops scrolling parents from intercepting the touch event, allowing 5541 // the user to continue dragging across the screen to select text; TextView will 5542 // scroll as necessary. 5543 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5544 mTextView.cancelLongPress(); 5545 } 5546 5547 public void onTouchEvent(MotionEvent event) { 5548 // This is done even when the View does not have focus, so that long presses can start 5549 // selection and tap can move cursor from this tap position. 5550 final float eventX = event.getX(); 5551 final float eventY = event.getY(); 5552 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5553 switch (event.getActionMasked()) { 5554 case MotionEvent.ACTION_DOWN: 5555 if (extractedTextModeWillBeStarted()) { 5556 // Prevent duplicating the selection handles until the mode starts. 5557 hide(); 5558 } else { 5559 // Remember finger down position, to be able to start selection from there. 5560 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5561 eventX, eventY); 5562 5563 // Double tap detection 5564 if (mGestureStayedInTapRegion) { 5565 if (mTapState == TAP_STATE_DOUBLE_TAP 5566 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5567 final float deltaX = eventX - mDownPositionX; 5568 final float deltaY = eventY - mDownPositionY; 5569 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5570 5571 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5572 mTextView.getContext()); 5573 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5574 boolean stayedInArea = 5575 distanceSquared < doubleTapSlop * doubleTapSlop; 5576 5577 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5578 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5579 selectCurrentWordAndStartDrag(); 5580 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5581 selectCurrentParagraphAndStartDrag(); 5582 } 5583 mDiscardNextActionUp = true; 5584 } 5585 } 5586 } 5587 5588 mDownPositionX = eventX; 5589 mDownPositionY = eventY; 5590 mGestureStayedInTapRegion = true; 5591 mHaventMovedEnoughToStartDrag = true; 5592 } 5593 break; 5594 5595 case MotionEvent.ACTION_POINTER_DOWN: 5596 case MotionEvent.ACTION_POINTER_UP: 5597 // Handle multi-point gestures. Keep min and max offset positions. 5598 // Only activated for devices that correctly handle multi-touch. 5599 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5600 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5601 updateMinAndMaxOffsets(event); 5602 } 5603 break; 5604 5605 case MotionEvent.ACTION_MOVE: 5606 final ViewConfiguration viewConfig = ViewConfiguration.get( 5607 mTextView.getContext()); 5608 final int touchSlop = viewConfig.getScaledTouchSlop(); 5609 5610 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5611 final float deltaX = eventX - mDownPositionX; 5612 final float deltaY = eventY - mDownPositionY; 5613 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5614 5615 if (mGestureStayedInTapRegion) { 5616 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5617 mGestureStayedInTapRegion = 5618 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5619 } 5620 if (mHaventMovedEnoughToStartDrag) { 5621 // We don't start dragging until the user has moved enough. 5622 mHaventMovedEnoughToStartDrag = 5623 distanceSquared <= touchSlop * touchSlop; 5624 } 5625 } 5626 5627 if (isMouse && !isDragAcceleratorActive()) { 5628 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5629 if (mTextView.hasSelection() 5630 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5631 && offset >= mTextView.getSelectionStart() 5632 && offset <= mTextView.getSelectionEnd()) { 5633 startDragAndDrop(); 5634 break; 5635 } 5636 5637 if (mStartOffset != offset) { 5638 // Start character based drag accelerator. 5639 stopTextActionMode(); 5640 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5641 mDiscardNextActionUp = true; 5642 mHaventMovedEnoughToStartDrag = false; 5643 } 5644 } 5645 5646 if (mStartHandle != null && mStartHandle.isShowing()) { 5647 // Don't do the drag if the handles are showing already. 5648 break; 5649 } 5650 5651 updateSelection(event); 5652 break; 5653 5654 case MotionEvent.ACTION_UP: 5655 if (!isDragAcceleratorActive()) { 5656 break; 5657 } 5658 updateSelection(event); 5659 5660 // No longer dragging to select text, let the parent intercept events. 5661 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5662 5663 // No longer the first dragging motion, reset. 5664 resetDragAcceleratorState(); 5665 5666 if (mTextView.hasSelection()) { 5667 // Drag selection should not be adjusted by the text classifier. 5668 startSelectionActionModeAsync(mHaventMovedEnoughToStartDrag); 5669 } 5670 break; 5671 } 5672 } 5673 5674 private void updateSelection(MotionEvent event) { 5675 if (mTextView.getLayout() != null) { 5676 switch (mDragAcceleratorMode) { 5677 case DRAG_ACCELERATOR_MODE_CHARACTER: 5678 updateCharacterBasedSelection(event); 5679 break; 5680 case DRAG_ACCELERATOR_MODE_WORD: 5681 updateWordBasedSelection(event); 5682 break; 5683 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5684 updateParagraphBasedSelection(event); 5685 break; 5686 } 5687 } 5688 } 5689 5690 /** 5691 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5692 * 5693 * @return true if the drag was started. 5694 */ 5695 private boolean selectCurrentParagraphAndStartDrag() { 5696 if (mInsertionActionModeRunnable != null) { 5697 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5698 } 5699 stopTextActionMode(); 5700 if (!selectCurrentParagraph()) { 5701 return false; 5702 } 5703 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5704 return true; 5705 } 5706 5707 private void updateCharacterBasedSelection(MotionEvent event) { 5708 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5709 updateSelectionInternal(mStartOffset, offset, 5710 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5711 } 5712 5713 private void updateWordBasedSelection(MotionEvent event) { 5714 if (mHaventMovedEnoughToStartDrag) { 5715 return; 5716 } 5717 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5718 final ViewConfiguration viewConfig = ViewConfiguration.get( 5719 mTextView.getContext()); 5720 final float eventX = event.getX(); 5721 final float eventY = event.getY(); 5722 final int currLine; 5723 if (isMouse) { 5724 // No need to offset the y coordinate for mouse input. 5725 currLine = mTextView.getLineAtCoordinate(eventY); 5726 } else { 5727 float y = eventY; 5728 if (mSwitchedLines) { 5729 // Offset the finger by the same vertical offset as the handles. 5730 // This improves visibility of the content being selected by 5731 // shifting the finger below the content, this is applied once 5732 // the user has switched lines. 5733 final int touchSlop = viewConfig.getScaledTouchSlop(); 5734 final float fingerOffset = (mStartHandle != null) 5735 ? mStartHandle.getIdealVerticalOffset() 5736 : touchSlop; 5737 y = eventY - fingerOffset; 5738 } 5739 5740 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5741 y); 5742 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5743 // Break early here, we want to offset the finger position from 5744 // the selection highlight, once the user moved their finger 5745 // to a different line we should apply the offset and *not* switch 5746 // lines until recomputing the position with the finger offset. 5747 mSwitchedLines = true; 5748 return; 5749 } 5750 } 5751 5752 int startOffset; 5753 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5754 // Snap to word boundaries. 5755 if (mStartOffset < offset) { 5756 // Expanding with end handle. 5757 offset = getWordEnd(offset); 5758 startOffset = getWordStart(mStartOffset); 5759 } else { 5760 // Expanding with start handle. 5761 offset = getWordStart(offset); 5762 startOffset = getWordEnd(mStartOffset); 5763 if (startOffset == offset) { 5764 offset = getNextCursorOffset(offset, false); 5765 } 5766 } 5767 mLineSelectionIsOn = currLine; 5768 updateSelectionInternal(startOffset, offset, 5769 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5770 } 5771 5772 private void updateParagraphBasedSelection(MotionEvent event) { 5773 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5774 5775 final int start = Math.min(offset, mStartOffset); 5776 final int end = Math.max(offset, mStartOffset); 5777 final long paragraphsRange = getParagraphsRange(start, end); 5778 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5779 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5780 updateSelectionInternal(selectionStart, selectionEnd, 5781 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5782 } 5783 5784 private void updateSelectionInternal(int selectionStart, int selectionEnd, 5785 boolean fromTouchScreen) { 5786 final boolean performHapticFeedback = fromTouchScreen && mHapticTextHandleEnabled 5787 && ((mTextView.getSelectionStart() != selectionStart) 5788 || (mTextView.getSelectionEnd() != selectionEnd)); 5789 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5790 if (performHapticFeedback) { 5791 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 5792 } 5793 } 5794 5795 /** 5796 * @param event 5797 */ 5798 private void updateMinAndMaxOffsets(MotionEvent event) { 5799 int pointerCount = event.getPointerCount(); 5800 for (int index = 0; index < pointerCount; index++) { 5801 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5802 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5803 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5804 } 5805 } 5806 5807 public int getMinTouchOffset() { 5808 return mMinTouchOffset; 5809 } 5810 5811 public int getMaxTouchOffset() { 5812 return mMaxTouchOffset; 5813 } 5814 5815 public void resetTouchOffsets() { 5816 mMinTouchOffset = mMaxTouchOffset = -1; 5817 resetDragAcceleratorState(); 5818 } 5819 5820 private void resetDragAcceleratorState() { 5821 mStartOffset = -1; 5822 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5823 mSwitchedLines = false; 5824 final int selectionStart = mTextView.getSelectionStart(); 5825 final int selectionEnd = mTextView.getSelectionEnd(); 5826 if (selectionStart > selectionEnd) { 5827 Selection.setSelection((Spannable) mTextView.getText(), 5828 selectionEnd, selectionStart); 5829 } 5830 } 5831 5832 /** 5833 * @return true iff this controller is currently used to move the selection start. 5834 */ 5835 public boolean isSelectionStartDragged() { 5836 return mStartHandle != null && mStartHandle.isDragging(); 5837 } 5838 5839 @Override 5840 public boolean isCursorBeingModified() { 5841 return isDragAcceleratorActive() || isSelectionStartDragged() 5842 || (mEndHandle != null && mEndHandle.isDragging()); 5843 } 5844 5845 /** 5846 * @return true if the user is selecting text using the drag accelerator. 5847 */ 5848 public boolean isDragAcceleratorActive() { 5849 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5850 } 5851 5852 public void onTouchModeChanged(boolean isInTouchMode) { 5853 if (!isInTouchMode) { 5854 hide(); 5855 } 5856 } 5857 5858 @Override 5859 public void onDetached() { 5860 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5861 observer.removeOnTouchModeChangeListener(this); 5862 5863 if (mStartHandle != null) mStartHandle.onDetached(); 5864 if (mEndHandle != null) mEndHandle.onDetached(); 5865 } 5866 5867 @Override 5868 public boolean isActive() { 5869 return mStartHandle != null && mStartHandle.isShowing(); 5870 } 5871 5872 public void invalidateHandles() { 5873 if (mStartHandle != null) { 5874 mStartHandle.invalidate(); 5875 } 5876 if (mEndHandle != null) { 5877 mEndHandle.invalidate(); 5878 } 5879 } 5880 } 5881 5882 private class CorrectionHighlighter { 5883 private final Path mPath = new Path(); 5884 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5885 private int mStart, mEnd; 5886 private long mFadingStartTime; 5887 private RectF mTempRectF; 5888 private static final int FADE_OUT_DURATION = 400; 5889 5890 public CorrectionHighlighter() { 5891 mPaint.setCompatibilityScaling( 5892 mTextView.getResources().getCompatibilityInfo().applicationScale); 5893 mPaint.setStyle(Paint.Style.FILL); 5894 } 5895 5896 public void highlight(CorrectionInfo info) { 5897 mStart = info.getOffset(); 5898 mEnd = mStart + info.getNewText().length(); 5899 mFadingStartTime = SystemClock.uptimeMillis(); 5900 5901 if (mStart < 0 || mEnd < 0) { 5902 stopAnimation(); 5903 } 5904 } 5905 5906 public void draw(Canvas canvas, int cursorOffsetVertical) { 5907 if (updatePath() && updatePaint()) { 5908 if (cursorOffsetVertical != 0) { 5909 canvas.translate(0, cursorOffsetVertical); 5910 } 5911 5912 canvas.drawPath(mPath, mPaint); 5913 5914 if (cursorOffsetVertical != 0) { 5915 canvas.translate(0, -cursorOffsetVertical); 5916 } 5917 invalidate(true); // TODO invalidate cursor region only 5918 } else { 5919 stopAnimation(); 5920 invalidate(false); // TODO invalidate cursor region only 5921 } 5922 } 5923 5924 private boolean updatePaint() { 5925 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5926 if (duration > FADE_OUT_DURATION) return false; 5927 5928 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5929 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5930 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 5931 + ((int) (highlightColorAlpha * coef) << 24); 5932 mPaint.setColor(color); 5933 return true; 5934 } 5935 5936 private boolean updatePath() { 5937 final Layout layout = mTextView.getLayout(); 5938 if (layout == null) return false; 5939 5940 // Update in case text is edited while the animation is run 5941 final int length = mTextView.getText().length(); 5942 int start = Math.min(length, mStart); 5943 int end = Math.min(length, mEnd); 5944 5945 mPath.reset(); 5946 layout.getSelectionPath(start, end, mPath); 5947 return true; 5948 } 5949 5950 private void invalidate(boolean delayed) { 5951 if (mTextView.getLayout() == null) return; 5952 5953 if (mTempRectF == null) mTempRectF = new RectF(); 5954 mPath.computeBounds(mTempRectF, false); 5955 5956 int left = mTextView.getCompoundPaddingLeft(); 5957 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5958 5959 if (delayed) { 5960 mTextView.postInvalidateOnAnimation( 5961 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5962 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5963 } else { 5964 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5965 (int) mTempRectF.right, (int) mTempRectF.bottom); 5966 } 5967 } 5968 5969 private void stopAnimation() { 5970 Editor.this.mCorrectionHighlighter = null; 5971 } 5972 } 5973 5974 private static class ErrorPopup extends PopupWindow { 5975 private boolean mAbove = false; 5976 private final TextView mView; 5977 private int mPopupInlineErrorBackgroundId = 0; 5978 private int mPopupInlineErrorAboveBackgroundId = 0; 5979 5980 ErrorPopup(TextView v, int width, int height) { 5981 super(v, width, height); 5982 mView = v; 5983 // Make sure the TextView has a background set as it will be used the first time it is 5984 // shown and positioned. Initialized with below background, which should have 5985 // dimensions identical to the above version for this to work (and is more likely). 5986 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5987 com.android.internal.R.styleable.Theme_errorMessageBackground); 5988 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5989 } 5990 5991 void fixDirection(boolean above) { 5992 mAbove = above; 5993 5994 if (above) { 5995 mPopupInlineErrorAboveBackgroundId = 5996 getResourceId(mPopupInlineErrorAboveBackgroundId, 5997 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5998 } else { 5999 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 6000 com.android.internal.R.styleable.Theme_errorMessageBackground); 6001 } 6002 6003 mView.setBackgroundResource( 6004 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 6005 } 6006 6007 private int getResourceId(int currentId, int index) { 6008 if (currentId == 0) { 6009 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 6010 R.styleable.Theme); 6011 currentId = styledAttributes.getResourceId(index, 0); 6012 styledAttributes.recycle(); 6013 } 6014 return currentId; 6015 } 6016 6017 @Override 6018 public void update(int x, int y, int w, int h, boolean force) { 6019 super.update(x, y, w, h, force); 6020 6021 boolean above = isAboveAnchor(); 6022 if (above != mAbove) { 6023 fixDirection(above); 6024 } 6025 } 6026 } 6027 6028 static class InputContentType { 6029 int imeOptions = EditorInfo.IME_NULL; 6030 String privateImeOptions; 6031 CharSequence imeActionLabel; 6032 int imeActionId; 6033 Bundle extras; 6034 OnEditorActionListener onEditorActionListener; 6035 boolean enterDown; 6036 LocaleList imeHintLocales; 6037 } 6038 6039 static class InputMethodState { 6040 ExtractedTextRequest mExtractedTextRequest; 6041 final ExtractedText mExtractedText = new ExtractedText(); 6042 int mBatchEditNesting; 6043 boolean mCursorChanged; 6044 boolean mSelectionModeChanged; 6045 boolean mContentChanged; 6046 int mChangedStart, mChangedEnd, mChangedDelta; 6047 } 6048 6049 /** 6050 * @return True iff (start, end) is a valid range within the text. 6051 */ 6052 private static boolean isValidRange(CharSequence text, int start, int end) { 6053 return 0 <= start && start <= end && end <= text.length(); 6054 } 6055 6056 @VisibleForTesting 6057 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 6058 return mSuggestionsPopupWindow; 6059 } 6060 6061 /** 6062 * An InputFilter that monitors text input to maintain undo history. It does not modify the 6063 * text being typed (and hence always returns null from the filter() method). 6064 * 6065 * TODO: Make this span aware. 6066 */ 6067 public static class UndoInputFilter implements InputFilter { 6068 private final Editor mEditor; 6069 6070 // Whether the current filter pass is directly caused by an end-user text edit. 6071 private boolean mIsUserEdit; 6072 6073 // Whether the text field is handling an IME composition. Must be parceled in case the user 6074 // rotates the screen during composition. 6075 private boolean mHasComposition; 6076 6077 // Whether the user is expanding or shortening the text 6078 private boolean mExpanding; 6079 6080 // Whether the previous edit operation was in the current batch edit. 6081 private boolean mPreviousOperationWasInSameBatchEdit; 6082 6083 public UndoInputFilter(Editor editor) { 6084 mEditor = editor; 6085 } 6086 6087 public void saveInstanceState(Parcel parcel) { 6088 parcel.writeInt(mIsUserEdit ? 1 : 0); 6089 parcel.writeInt(mHasComposition ? 1 : 0); 6090 parcel.writeInt(mExpanding ? 1 : 0); 6091 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 6092 } 6093 6094 public void restoreInstanceState(Parcel parcel) { 6095 mIsUserEdit = parcel.readInt() != 0; 6096 mHasComposition = parcel.readInt() != 0; 6097 mExpanding = parcel.readInt() != 0; 6098 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 6099 } 6100 6101 /** 6102 * Signals that a user-triggered edit is starting. 6103 */ 6104 public void beginBatchEdit() { 6105 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 6106 mIsUserEdit = true; 6107 } 6108 6109 public void endBatchEdit() { 6110 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 6111 mIsUserEdit = false; 6112 mPreviousOperationWasInSameBatchEdit = false; 6113 } 6114 6115 @Override 6116 public CharSequence filter(CharSequence source, int start, int end, 6117 Spanned dest, int dstart, int dend) { 6118 if (DEBUG_UNDO) { 6119 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 6120 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 6121 } 6122 6123 // Check to see if this edit should be tracked for undo. 6124 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 6125 return null; 6126 } 6127 6128 final boolean hadComposition = mHasComposition; 6129 mHasComposition = isComposition(source); 6130 final boolean wasExpanding = mExpanding; 6131 boolean shouldCreateSeparateState = false; 6132 if ((end - start) != (dend - dstart)) { 6133 mExpanding = (end - start) > (dend - dstart); 6134 if (hadComposition && mExpanding != wasExpanding) { 6135 shouldCreateSeparateState = true; 6136 } 6137 } 6138 6139 // Handle edit. 6140 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 6141 return null; 6142 } 6143 6144 void freezeLastEdit() { 6145 mEditor.mUndoManager.beginUpdate("Edit text"); 6146 EditOperation lastEdit = getLastEdit(); 6147 if (lastEdit != null) { 6148 lastEdit.mFrozen = true; 6149 } 6150 mEditor.mUndoManager.endUpdate(); 6151 } 6152 6153 @Retention(RetentionPolicy.SOURCE) 6154 @IntDef(prefix = { "MERGE_EDIT_MODE_" }, value = { 6155 MERGE_EDIT_MODE_FORCE_MERGE, 6156 MERGE_EDIT_MODE_NEVER_MERGE, 6157 MERGE_EDIT_MODE_NORMAL 6158 }) 6159 private @interface MergeMode {} 6160 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 6161 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 6162 /** Use {@link EditOperation#mergeWith} to merge */ 6163 private static final int MERGE_EDIT_MODE_NORMAL = 2; 6164 6165 private void handleEdit(CharSequence source, int start, int end, 6166 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 6167 // An application may install a TextWatcher to provide additional modifications after 6168 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 6169 // string). This results in multiple filter() calls for what the user considers to be 6170 // a single operation. Always undo the whole set of changes in one step. 6171 @MergeMode 6172 final int mergeMode; 6173 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 6174 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 6175 } else if (shouldCreateSeparateState) { 6176 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 6177 } else { 6178 mergeMode = MERGE_EDIT_MODE_NORMAL; 6179 } 6180 // Build a new operation with all the information from this edit. 6181 String newText = TextUtils.substring(source, start, end); 6182 String oldText = TextUtils.substring(dest, dstart, dend); 6183 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 6184 mHasComposition); 6185 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 6186 return; 6187 } 6188 recordEdit(edit, mergeMode); 6189 } 6190 6191 private EditOperation getLastEdit() { 6192 final UndoManager um = mEditor.mUndoManager; 6193 return um.getLastOperation( 6194 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 6195 } 6196 /** 6197 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 6198 * If forceMerge is true then the new edit is always merged. 6199 */ 6200 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 6201 // Fetch the last edit operation and attempt to merge in the new edit. 6202 final UndoManager um = mEditor.mUndoManager; 6203 um.beginUpdate("Edit text"); 6204 EditOperation lastEdit = getLastEdit(); 6205 if (lastEdit == null) { 6206 // Add this as the first edit. 6207 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 6208 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6209 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 6210 // Forced merges take priority because they could be the result of a non-user-edit 6211 // change and this case should not create a new undo operation. 6212 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 6213 lastEdit.forceMergeWith(edit); 6214 } else if (!mIsUserEdit) { 6215 // An application directly modified the Editable outside of a text edit. Treat this 6216 // as a new change and don't attempt to merge. 6217 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 6218 um.commitState(mEditor.mUndoOwner); 6219 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6220 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 6221 // Merge succeeded, nothing else to do. 6222 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 6223 } else { 6224 // Could not merge with the last edit, so commit the last edit and add this edit. 6225 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 6226 um.commitState(mEditor.mUndoOwner); 6227 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6228 } 6229 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 6230 um.endUpdate(); 6231 } 6232 6233 private boolean canUndoEdit(CharSequence source, int start, int end, 6234 Spanned dest, int dstart, int dend) { 6235 if (!mEditor.mAllowUndo) { 6236 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 6237 return false; 6238 } 6239 6240 if (mEditor.mUndoManager.isInUndo()) { 6241 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 6242 return false; 6243 } 6244 6245 // Text filters run before input operations are applied. However, some input operations 6246 // are invalid and will throw exceptions when applied. This is common in tests. Don't 6247 // attempt to undo invalid operations. 6248 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 6249 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 6250 return false; 6251 } 6252 6253 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 6254 // on an input field. Skip no-op changes. 6255 if (start == end && dstart == dend) { 6256 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 6257 return false; 6258 } 6259 6260 return true; 6261 } 6262 6263 private static boolean isComposition(CharSequence source) { 6264 if (!(source instanceof Spannable)) { 6265 return false; 6266 } 6267 // This is a composition edit if the source has a non-zero-length composing span. 6268 Spannable text = (Spannable) source; 6269 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6270 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6271 return composeBegin < composeEnd; 6272 } 6273 6274 private boolean isInTextWatcher() { 6275 CharSequence text = mEditor.mTextView.getText(); 6276 return (text instanceof SpannableStringBuilder) 6277 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6278 } 6279 } 6280 6281 /** 6282 * An operation to undo a single "edit" to a text view. 6283 */ 6284 public static class EditOperation extends UndoOperation<Editor> { 6285 private static final int TYPE_INSERT = 0; 6286 private static final int TYPE_DELETE = 1; 6287 private static final int TYPE_REPLACE = 2; 6288 6289 private int mType; 6290 private String mOldText; 6291 private String mNewText; 6292 private int mStart; 6293 6294 private int mOldCursorPos; 6295 private int mNewCursorPos; 6296 private boolean mFrozen; 6297 private boolean mIsComposition; 6298 6299 /** 6300 * Constructs an edit operation from a text input operation on editor that replaces the 6301 * oldText starting at dstart with newText. 6302 */ 6303 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6304 boolean isComposition) { 6305 super(editor.mUndoOwner); 6306 mOldText = oldText; 6307 mNewText = newText; 6308 6309 // Determine the type of the edit. 6310 if (mNewText.length() > 0 && mOldText.length() == 0) { 6311 mType = TYPE_INSERT; 6312 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6313 mType = TYPE_DELETE; 6314 } else { 6315 mType = TYPE_REPLACE; 6316 } 6317 6318 mStart = dstart; 6319 // Store cursor data. 6320 mOldCursorPos = editor.mTextView.getSelectionStart(); 6321 mNewCursorPos = dstart + mNewText.length(); 6322 mIsComposition = isComposition; 6323 } 6324 6325 public EditOperation(Parcel src, ClassLoader loader) { 6326 super(src, loader); 6327 mType = src.readInt(); 6328 mOldText = src.readString(); 6329 mNewText = src.readString(); 6330 mStart = src.readInt(); 6331 mOldCursorPos = src.readInt(); 6332 mNewCursorPos = src.readInt(); 6333 mFrozen = src.readInt() == 1; 6334 mIsComposition = src.readInt() == 1; 6335 } 6336 6337 @Override 6338 public void writeToParcel(Parcel dest, int flags) { 6339 dest.writeInt(mType); 6340 dest.writeString(mOldText); 6341 dest.writeString(mNewText); 6342 dest.writeInt(mStart); 6343 dest.writeInt(mOldCursorPos); 6344 dest.writeInt(mNewCursorPos); 6345 dest.writeInt(mFrozen ? 1 : 0); 6346 dest.writeInt(mIsComposition ? 1 : 0); 6347 } 6348 6349 private int getNewTextEnd() { 6350 return mStart + mNewText.length(); 6351 } 6352 6353 private int getOldTextEnd() { 6354 return mStart + mOldText.length(); 6355 } 6356 6357 @Override 6358 public void commit() { 6359 } 6360 6361 @Override 6362 public void undo() { 6363 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6364 // Remove the new text and insert the old. 6365 Editor editor = getOwnerData(); 6366 Editable text = (Editable) editor.mTextView.getText(); 6367 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6368 } 6369 6370 @Override 6371 public void redo() { 6372 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6373 // Remove the old text and insert the new. 6374 Editor editor = getOwnerData(); 6375 Editable text = (Editable) editor.mTextView.getText(); 6376 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6377 } 6378 6379 /** 6380 * Attempts to merge this existing operation with a new edit. 6381 * @param edit The new edit operation. 6382 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6383 * object unchanged. 6384 */ 6385 private boolean mergeWith(EditOperation edit) { 6386 if (DEBUG_UNDO) { 6387 Log.d(TAG, "mergeWith old " + this); 6388 Log.d(TAG, "mergeWith new " + edit); 6389 } 6390 6391 if (mFrozen) { 6392 return false; 6393 } 6394 6395 switch (mType) { 6396 case TYPE_INSERT: 6397 return mergeInsertWith(edit); 6398 case TYPE_DELETE: 6399 return mergeDeleteWith(edit); 6400 case TYPE_REPLACE: 6401 return mergeReplaceWith(edit); 6402 default: 6403 return false; 6404 } 6405 } 6406 6407 private boolean mergeInsertWith(EditOperation edit) { 6408 if (edit.mType == TYPE_INSERT) { 6409 // Merge insertions that are contiguous even when it's frozen. 6410 if (getNewTextEnd() != edit.mStart) { 6411 return false; 6412 } 6413 mNewText += edit.mNewText; 6414 mNewCursorPos = edit.mNewCursorPos; 6415 mFrozen = edit.mFrozen; 6416 mIsComposition = edit.mIsComposition; 6417 return true; 6418 } 6419 if (mIsComposition && edit.mType == TYPE_REPLACE 6420 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6421 // Merge insertion with replace as they can be single insertion. 6422 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6423 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6424 mNewCursorPos = edit.mNewCursorPos; 6425 mIsComposition = edit.mIsComposition; 6426 return true; 6427 } 6428 return false; 6429 } 6430 6431 // TODO: Support forward delete. 6432 private boolean mergeDeleteWith(EditOperation edit) { 6433 // Only merge continuous deletes. 6434 if (edit.mType != TYPE_DELETE) { 6435 return false; 6436 } 6437 // Only merge deletions that are contiguous. 6438 if (mStart != edit.getOldTextEnd()) { 6439 return false; 6440 } 6441 mStart = edit.mStart; 6442 mOldText = edit.mOldText + mOldText; 6443 mNewCursorPos = edit.mNewCursorPos; 6444 mIsComposition = edit.mIsComposition; 6445 return true; 6446 } 6447 6448 private boolean mergeReplaceWith(EditOperation edit) { 6449 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6450 // Merge with adjacent insert. 6451 mNewText += edit.mNewText; 6452 mNewCursorPos = edit.mNewCursorPos; 6453 return true; 6454 } 6455 if (!mIsComposition) { 6456 return false; 6457 } 6458 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6459 && getNewTextEnd() >= edit.getOldTextEnd()) { 6460 // Merge with delete as they can be single operation. 6461 mNewText = mNewText.substring(0, edit.mStart - mStart) 6462 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6463 if (mNewText.isEmpty()) { 6464 mType = TYPE_DELETE; 6465 } 6466 mNewCursorPos = edit.mNewCursorPos; 6467 mIsComposition = edit.mIsComposition; 6468 return true; 6469 } 6470 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6471 && TextUtils.equals(mNewText, edit.mOldText)) { 6472 // Merge with the replace that replaces the same region. 6473 mNewText = edit.mNewText; 6474 mNewCursorPos = edit.mNewCursorPos; 6475 mIsComposition = edit.mIsComposition; 6476 return true; 6477 } 6478 return false; 6479 } 6480 6481 /** 6482 * Forcibly creates a single merged edit operation by simulating the entire text 6483 * contents being replaced. 6484 */ 6485 public void forceMergeWith(EditOperation edit) { 6486 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6487 if (mergeWith(edit)) { 6488 return; 6489 } 6490 Editor editor = getOwnerData(); 6491 6492 // Copy the text of the current field. 6493 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6494 // but would require two parallel implementations of modifyText() because Editable and 6495 // StringBuilder do not share an interface for replace/delete/insert. 6496 Editable editable = (Editable) editor.mTextView.getText(); 6497 Editable originalText = new SpannableStringBuilder(editable.toString()); 6498 6499 // Roll back the last operation. 6500 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6501 6502 // Clone the text again and apply the new operation. 6503 Editable finalText = new SpannableStringBuilder(editable.toString()); 6504 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6505 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6506 6507 // Convert this operation into a replace operation. 6508 mType = TYPE_REPLACE; 6509 mNewText = finalText.toString(); 6510 mOldText = originalText.toString(); 6511 mStart = 0; 6512 mNewCursorPos = edit.mNewCursorPos; 6513 mIsComposition = edit.mIsComposition; 6514 // mOldCursorPos is unchanged. 6515 } 6516 6517 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6518 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6519 // Apply the edit if it is still valid. 6520 if (isValidRange(text, deleteFrom, deleteTo) 6521 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6522 if (deleteFrom != deleteTo) { 6523 text.delete(deleteFrom, deleteTo); 6524 } 6525 if (newText.length() != 0) { 6526 text.insert(newTextInsertAt, newText); 6527 } 6528 } 6529 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6530 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6531 // TODO: Select all the text that was undone. 6532 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6533 Selection.setSelection(text, newCursorPos); 6534 } 6535 } 6536 6537 private String getTypeString() { 6538 switch (mType) { 6539 case TYPE_INSERT: 6540 return "insert"; 6541 case TYPE_DELETE: 6542 return "delete"; 6543 case TYPE_REPLACE: 6544 return "replace"; 6545 default: 6546 return ""; 6547 } 6548 } 6549 6550 @Override 6551 public String toString() { 6552 return "[mType=" + getTypeString() + ", " 6553 + "mOldText=" + mOldText + ", " 6554 + "mNewText=" + mNewText + ", " 6555 + "mStart=" + mStart + ", " 6556 + "mOldCursorPos=" + mOldCursorPos + ", " 6557 + "mNewCursorPos=" + mNewCursorPos + ", " 6558 + "mFrozen=" + mFrozen + ", " 6559 + "mIsComposition=" + mIsComposition + "]"; 6560 } 6561 6562 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6563 new Parcelable.ClassLoaderCreator<EditOperation>() { 6564 @Override 6565 public EditOperation createFromParcel(Parcel in) { 6566 return new EditOperation(in, null); 6567 } 6568 6569 @Override 6570 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6571 return new EditOperation(in, loader); 6572 } 6573 6574 @Override 6575 public EditOperation[] newArray(int size) { 6576 return new EditOperation[size]; 6577 } 6578 }; 6579 } 6580 6581 /** 6582 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6583 * These allow external applications to plug into currently selected text. 6584 */ 6585 static final class ProcessTextIntentActionsHandler { 6586 6587 private final Editor mEditor; 6588 private final TextView mTextView; 6589 private final Context mContext; 6590 private final PackageManager mPackageManager; 6591 private final String mPackageName; 6592 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6593 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6594 new SparseArray<>(); 6595 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6596 6597 private ProcessTextIntentActionsHandler(Editor editor) { 6598 mEditor = Preconditions.checkNotNull(editor); 6599 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6600 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6601 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6602 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6603 } 6604 6605 /** 6606 * Adds "PROCESS_TEXT" menu items to the specified menu. 6607 */ 6608 public void onInitializeMenu(Menu menu) { 6609 loadSupportedActivities(); 6610 final int size = mSupportedActivities.size(); 6611 for (int i = 0; i < size; i++) { 6612 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6613 menu.add(Menu.NONE, Menu.NONE, 6614 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i, 6615 getLabel(resolveInfo)) 6616 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6617 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 6618 } 6619 } 6620 6621 /** 6622 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6623 * menu item. 6624 * 6625 * @return True if the action was performed, false otherwise. 6626 */ 6627 public boolean performMenuItemAction(MenuItem item) { 6628 return fireIntent(item.getIntent()); 6629 } 6630 6631 /** 6632 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6633 */ 6634 public void initializeAccessibilityActions() { 6635 mAccessibilityIntents.clear(); 6636 mAccessibilityActions.clear(); 6637 int i = 0; 6638 loadSupportedActivities(); 6639 for (ResolveInfo resolveInfo : mSupportedActivities) { 6640 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6641 mAccessibilityActions.put( 6642 actionId, 6643 new AccessibilityNodeInfo.AccessibilityAction( 6644 actionId, getLabel(resolveInfo))); 6645 mAccessibilityIntents.put( 6646 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6647 } 6648 } 6649 6650 /** 6651 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6652 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6653 * latest accessibility actions available for this call. 6654 */ 6655 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6656 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6657 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6658 } 6659 } 6660 6661 /** 6662 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6663 * accessibility action id. 6664 * 6665 * @return True if the action was performed, false otherwise. 6666 */ 6667 public boolean performAccessibilityAction(int actionId) { 6668 return fireIntent(mAccessibilityIntents.get(actionId)); 6669 } 6670 6671 private boolean fireIntent(Intent intent) { 6672 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6673 String selectedText = mTextView.getSelectedText(); 6674 selectedText = TextUtils.trimToParcelableSize(selectedText); 6675 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, selectedText); 6676 mEditor.mPreserveSelection = true; 6677 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6678 return true; 6679 } 6680 return false; 6681 } 6682 6683 private void loadSupportedActivities() { 6684 mSupportedActivities.clear(); 6685 if (!mContext.canStartActivityForResult()) { 6686 return; 6687 } 6688 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6689 List<ResolveInfo> unfiltered = 6690 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6691 for (ResolveInfo info : unfiltered) { 6692 if (isSupportedActivity(info)) { 6693 mSupportedActivities.add(info); 6694 } 6695 } 6696 } 6697 6698 private boolean isSupportedActivity(ResolveInfo info) { 6699 return mPackageName.equals(info.activityInfo.packageName) 6700 || info.activityInfo.exported 6701 && (info.activityInfo.permission == null 6702 || mContext.checkSelfPermission(info.activityInfo.permission) 6703 == PackageManager.PERMISSION_GRANTED); 6704 } 6705 6706 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6707 return createProcessTextIntent() 6708 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6709 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6710 } 6711 6712 private Intent createProcessTextIntent() { 6713 return new Intent() 6714 .setAction(Intent.ACTION_PROCESS_TEXT) 6715 .setType("text/plain"); 6716 } 6717 6718 private CharSequence getLabel(ResolveInfo resolveInfo) { 6719 return resolveInfo.loadLabel(mPackageManager); 6720 } 6721 } 6722} 6723